Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 1 | /* |
| 2 | * HTTP/2 mux-demux for connections |
| 3 | * |
| 4 | * Copyright 2017 Willy Tarreau <w@1wt.eu> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <common/cfgparse.h> |
| 14 | #include <common/config.h> |
Willy Tarreau | afba57a | 2018-12-11 13:44:24 +0100 | [diff] [blame] | 15 | #include <common/h1.h> |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 16 | #include <common/h2.h> |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 17 | #include <common/hpack-dec.h> |
Willy Tarreau | 9e5ae1d | 2017-10-17 19:58:20 +0200 | [diff] [blame] | 18 | #include <common/hpack-enc.h> |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 19 | #include <common/hpack-tbl.h> |
Willy Tarreau | b96b77e | 2018-12-11 10:22:41 +0100 | [diff] [blame] | 20 | #include <common/htx.h> |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 21 | #include <common/initcall.h> |
Willy Tarreau | e482074 | 2017-07-27 13:37:23 +0200 | [diff] [blame] | 22 | #include <common/net_helper.h> |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 23 | #include <proto/connection.h> |
Willy Tarreau | bcd3bb3 | 2018-12-01 18:59:00 +0100 | [diff] [blame] | 24 | #include <proto/http_htx.h> |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 25 | #include <proto/trace.h> |
Olivier Houchard | 44d5914 | 2018-12-13 18:46:22 +0100 | [diff] [blame] | 26 | #include <proto/session.h> |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 27 | #include <proto/stream.h> |
Olivier Houchard | 44d5914 | 2018-12-13 18:46:22 +0100 | [diff] [blame] | 28 | #include <proto/stream_interface.h> |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 29 | #include <types/session.h> |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 30 | #include <eb32tree.h> |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 31 | |
| 32 | |
Willy Tarreau | ecb9dcd | 2019-01-03 12:00:17 +0100 | [diff] [blame] | 33 | /* dummy streams returned for closed, error, refused, idle and states */ |
Willy Tarreau | 2a85618 | 2017-05-16 15:20:39 +0200 | [diff] [blame] | 34 | static const struct h2s *h2_closed_stream; |
Willy Tarreau | ecb9dcd | 2019-01-03 12:00:17 +0100 | [diff] [blame] | 35 | static const struct h2s *h2_error_stream; |
Willy Tarreau | 8d0d58b | 2018-12-23 18:29:12 +0100 | [diff] [blame] | 36 | static const struct h2s *h2_refused_stream; |
Willy Tarreau | 2a85618 | 2017-05-16 15:20:39 +0200 | [diff] [blame] | 37 | static const struct h2s *h2_idle_stream; |
| 38 | |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 39 | /* Connection flags (32 bit), in h2c->flags */ |
| 40 | #define H2_CF_NONE 0x00000000 |
| 41 | |
Willy Tarreau | 2e5b60e | 2017-09-25 11:49:03 +0200 | [diff] [blame] | 42 | /* Flags indicating why writing to the mux is blocked. */ |
| 43 | #define H2_CF_MUX_MALLOC 0x00000001 // mux blocked on lack of connection's mux buffer |
| 44 | #define H2_CF_MUX_MFULL 0x00000002 // mux blocked on connection's mux buffer full |
| 45 | #define H2_CF_MUX_BLOCK_ANY 0x00000003 // aggregate of the mux flags above |
| 46 | |
Willy Tarreau | 315d807 | 2017-12-10 22:17:57 +0100 | [diff] [blame] | 47 | /* Flags indicating why writing to the demux is blocked. |
| 48 | * The first two ones directly affect the ability for the mux to receive data |
| 49 | * from the connection. The other ones affect the mux's ability to demux |
| 50 | * received data. |
| 51 | */ |
Willy Tarreau | 2e5b60e | 2017-09-25 11:49:03 +0200 | [diff] [blame] | 52 | #define H2_CF_DEM_DALLOC 0x00000004 // demux blocked on lack of connection's demux buffer |
| 53 | #define H2_CF_DEM_DFULL 0x00000008 // demux blocked on connection's demux buffer full |
Willy Tarreau | 315d807 | 2017-12-10 22:17:57 +0100 | [diff] [blame] | 54 | |
Willy Tarreau | 2e5b60e | 2017-09-25 11:49:03 +0200 | [diff] [blame] | 55 | #define H2_CF_DEM_MBUSY 0x00000010 // demux blocked on connection's mux side busy |
| 56 | #define H2_CF_DEM_MROOM 0x00000020 // demux blocked on lack of room in mux buffer |
| 57 | #define H2_CF_DEM_SALLOC 0x00000040 // demux blocked on lack of stream's request buffer |
| 58 | #define H2_CF_DEM_SFULL 0x00000080 // demux blocked on stream request buffer full |
Willy Tarreau | f210191 | 2018-07-19 10:11:38 +0200 | [diff] [blame] | 59 | #define H2_CF_DEM_TOOMANY 0x00000100 // demux blocked waiting for some conn_streams to leave |
| 60 | #define H2_CF_DEM_BLOCK_ANY 0x000001F0 // aggregate of the demux flags above except DALLOC/DFULL |
Willy Tarreau | 2e5b60e | 2017-09-25 11:49:03 +0200 | [diff] [blame] | 61 | |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 62 | /* other flags */ |
Willy Tarreau | f210191 | 2018-07-19 10:11:38 +0200 | [diff] [blame] | 63 | #define H2_CF_GOAWAY_SENT 0x00001000 // a GOAWAY frame was successfully sent |
| 64 | #define H2_CF_GOAWAY_FAILED 0x00002000 // a GOAWAY frame failed to be sent |
| 65 | #define H2_CF_WAIT_FOR_HS 0x00004000 // We did check that at least a stream was waiting for handshake |
Willy Tarreau | b3fb56d | 2018-10-03 13:56:38 +0200 | [diff] [blame] | 66 | #define H2_CF_IS_BACK 0x00008000 // this is an outgoing connection |
Willy Tarreau | 97aaa67 | 2018-12-23 09:49:04 +0100 | [diff] [blame] | 67 | #define H2_CF_WINDOW_OPENED 0x00010000 // demux increased window already advertised |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 68 | |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 69 | /* H2 connection state, in h2c->st0 */ |
| 70 | enum h2_cs { |
| 71 | H2_CS_PREFACE, // init done, waiting for connection preface |
| 72 | H2_CS_SETTINGS1, // preface OK, waiting for first settings frame |
| 73 | H2_CS_FRAME_H, // first settings frame ok, waiting for frame header |
| 74 | H2_CS_FRAME_P, // frame header OK, waiting for frame payload |
Willy Tarreau | a20a519 | 2017-12-27 11:02:06 +0100 | [diff] [blame] | 75 | H2_CS_FRAME_A, // frame payload OK, trying to send ACK frame |
| 76 | H2_CS_FRAME_E, // frame payload OK, trying to send RST frame |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 77 | H2_CS_ERROR, // send GOAWAY(errcode) and close the connection ASAP |
| 78 | H2_CS_ERROR2, // GOAWAY(errcode) sent, close the connection ASAP |
| 79 | H2_CS_ENTRIES // must be last |
| 80 | } __attribute__((packed)); |
| 81 | |
Willy Tarreau | 5133096 | 2019-05-26 09:38:07 +0200 | [diff] [blame] | 82 | |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 83 | /* 32 buffers: one for the ring's root, rest for the mbuf itself */ |
| 84 | #define H2C_MBUF_CNT 32 |
Willy Tarreau | 5133096 | 2019-05-26 09:38:07 +0200 | [diff] [blame] | 85 | |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 86 | /* H2 connection descriptor */ |
| 87 | struct h2c { |
| 88 | struct connection *conn; |
| 89 | |
| 90 | enum h2_cs st0; /* mux state */ |
| 91 | enum h2_err errcode; /* H2 err code (H2_ERR_*) */ |
| 92 | |
| 93 | /* 16 bit hole here */ |
| 94 | uint32_t flags; /* connection flags: H2_CF_* */ |
Willy Tarreau | 2e2083a | 2019-01-31 10:34:07 +0100 | [diff] [blame] | 95 | uint32_t streams_limit; /* maximum number of concurrent streams the peer supports */ |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 96 | int32_t max_id; /* highest ID known on this connection, <0 before preface */ |
| 97 | uint32_t rcvd_c; /* newly received data to ACK for the connection */ |
| 98 | uint32_t rcvd_s; /* newly received data to ACK for the current stream (dsi) */ |
| 99 | |
| 100 | /* states for the demux direction */ |
| 101 | struct hpack_dht *ddht; /* demux dynamic header table */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 102 | struct buffer dbuf; /* demux buffer */ |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 103 | |
| 104 | int32_t dsi; /* demux stream ID (<0 = idle) */ |
| 105 | int32_t dfl; /* demux frame length (if dsi >= 0) */ |
| 106 | int8_t dft; /* demux frame type (if dsi >= 0) */ |
| 107 | int8_t dff; /* demux frame flags (if dsi >= 0) */ |
Willy Tarreau | 05e5daf | 2017-12-11 15:17:36 +0100 | [diff] [blame] | 108 | uint8_t dpl; /* demux pad length (part of dfl), init to 0 */ |
| 109 | /* 8 bit hole here */ |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 110 | int32_t last_sid; /* last processed stream ID for GOAWAY, <0 before preface */ |
| 111 | |
| 112 | /* states for the mux direction */ |
Willy Tarreau | 5133096 | 2019-05-26 09:38:07 +0200 | [diff] [blame] | 113 | struct buffer mbuf[H2C_MBUF_CNT]; /* mux buffers (ring) */ |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 114 | int32_t msi; /* mux stream ID (<0 = idle) */ |
| 115 | int32_t mfl; /* mux frame length (if dsi >= 0) */ |
| 116 | int8_t mft; /* mux frame type (if dsi >= 0) */ |
| 117 | int8_t mff; /* mux frame flags (if dsi >= 0) */ |
| 118 | /* 16 bit hole here */ |
| 119 | int32_t miw; /* mux initial window size for all new streams */ |
| 120 | int32_t mws; /* mux window size. Can be negative. */ |
| 121 | int32_t mfs; /* mux's max frame size */ |
| 122 | |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 123 | int timeout; /* idle timeout duration in ticks */ |
Willy Tarreau | 599391a | 2017-11-24 10:16:00 +0100 | [diff] [blame] | 124 | int shut_timeout; /* idle timeout duration in ticks after GOAWAY was sent */ |
Willy Tarreau | 4974561 | 2017-12-03 18:56:02 +0100 | [diff] [blame] | 125 | unsigned int nb_streams; /* number of streams in the tree */ |
Willy Tarreau | 7ac60e8 | 2018-07-19 09:04:05 +0200 | [diff] [blame] | 126 | unsigned int nb_cs; /* number of attached conn_streams */ |
Willy Tarreau | d64a3eb | 2019-01-23 10:22:21 +0100 | [diff] [blame] | 127 | unsigned int nb_reserved; /* number of reserved streams */ |
Willy Tarreau | e9634bd | 2019-01-23 10:25:10 +0100 | [diff] [blame] | 128 | unsigned int stream_cnt; /* total number of streams seen */ |
Willy Tarreau | 0b37d65 | 2018-10-03 10:33:02 +0200 | [diff] [blame] | 129 | struct proxy *proxy; /* the proxy this connection was created for */ |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 130 | struct task *task; /* timeout management task */ |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 131 | struct eb_root streams_by_id; /* all active streams by their ID */ |
| 132 | struct list send_list; /* list of blocked streams requesting to send */ |
| 133 | struct list fctl_list; /* list of streams blocked by connection's fctl */ |
Willy Tarreau | 9edf6db | 2019-10-02 10:49:59 +0200 | [diff] [blame] | 134 | struct list blocked_list; /* list of streams blocked for other reasons (e.g. sfctl, dep) */ |
Willy Tarreau | 44e973f | 2018-03-01 17:49:30 +0100 | [diff] [blame] | 135 | struct buffer_wait buf_wait; /* wait list for buffer allocations */ |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 136 | struct wait_event wait_event; /* To be used if we're waiting for I/Os */ |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 137 | }; |
| 138 | |
Willy Tarreau | 1831264 | 2017-10-11 07:57:07 +0200 | [diff] [blame] | 139 | /* H2 stream state, in h2s->st */ |
| 140 | enum h2_ss { |
| 141 | H2_SS_IDLE = 0, // idle |
| 142 | H2_SS_RLOC, // reserved(local) |
| 143 | H2_SS_RREM, // reserved(remote) |
| 144 | H2_SS_OPEN, // open |
| 145 | H2_SS_HREM, // half-closed(remote) |
| 146 | H2_SS_HLOC, // half-closed(local) |
Willy Tarreau | 96060ba | 2017-10-16 18:34:34 +0200 | [diff] [blame] | 147 | H2_SS_ERROR, // an error needs to be sent using RST_STREAM |
Willy Tarreau | 1831264 | 2017-10-11 07:57:07 +0200 | [diff] [blame] | 148 | H2_SS_CLOSED, // closed |
| 149 | H2_SS_ENTRIES // must be last |
| 150 | } __attribute__((packed)); |
| 151 | |
Willy Tarreau | 4c688eb | 2019-05-14 11:44:03 +0200 | [diff] [blame] | 152 | #define H2_SS_MASK(state) (1UL << (state)) |
| 153 | #define H2_SS_IDLE_BIT (1UL << H2_SS_IDLE) |
| 154 | #define H2_SS_RLOC_BIT (1UL << H2_SS_RLOC) |
| 155 | #define H2_SS_RREM_BIT (1UL << H2_SS_RREM) |
| 156 | #define H2_SS_OPEN_BIT (1UL << H2_SS_OPEN) |
| 157 | #define H2_SS_HREM_BIT (1UL << H2_SS_HREM) |
| 158 | #define H2_SS_HLOC_BIT (1UL << H2_SS_HLOC) |
| 159 | #define H2_SS_ERROR_BIT (1UL << H2_SS_ERROR) |
| 160 | #define H2_SS_CLOSED_BIT (1UL << H2_SS_CLOSED) |
Willy Tarreau | 4c688eb | 2019-05-14 11:44:03 +0200 | [diff] [blame] | 161 | |
Willy Tarreau | 1831264 | 2017-10-11 07:57:07 +0200 | [diff] [blame] | 162 | /* HTTP/2 stream flags (32 bit), in h2s->flags */ |
| 163 | #define H2_SF_NONE 0x00000000 |
| 164 | #define H2_SF_ES_RCVD 0x00000001 |
| 165 | #define H2_SF_ES_SENT 0x00000002 |
| 166 | |
| 167 | #define H2_SF_RST_RCVD 0x00000004 // received RST_STREAM |
| 168 | #define H2_SF_RST_SENT 0x00000008 // sent RST_STREAM |
| 169 | |
Willy Tarreau | 2e5b60e | 2017-09-25 11:49:03 +0200 | [diff] [blame] | 170 | /* stream flags indicating the reason the stream is blocked */ |
| 171 | #define H2_SF_BLK_MBUSY 0x00000010 // blocked waiting for mux access (transient) |
Willy Tarreau | 9edf6db | 2019-10-02 10:49:59 +0200 | [diff] [blame] | 172 | #define H2_SF_BLK_MROOM 0x00000020 // blocked waiting for room in the mux (must be in send list) |
| 173 | #define H2_SF_BLK_MFCTL 0x00000040 // blocked due to mux fctl (must be in fctl list) |
| 174 | #define H2_SF_BLK_SFCTL 0x00000080 // blocked due to stream fctl (must be in blocked list) |
Willy Tarreau | 2e5b60e | 2017-09-25 11:49:03 +0200 | [diff] [blame] | 175 | #define H2_SF_BLK_ANY 0x000000F0 // any of the reasons above |
| 176 | |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 177 | /* stream flags indicating how data is supposed to be sent */ |
| 178 | #define H2_SF_DATA_CLEN 0x00000100 // data sent using content-length |
Willy Tarreau | d946416 | 2020-01-10 18:25:07 +0100 | [diff] [blame] | 179 | /* unused flags: 0x00000200, 0x00000400 */ |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 180 | |
Willy Tarreau | d946416 | 2020-01-10 18:25:07 +0100 | [diff] [blame] | 181 | #define H2_SF_NOTIFIED 0x00000800 // a paused stream was notified to try to send again |
Willy Tarreau | 6743420 | 2017-11-06 20:20:51 +0100 | [diff] [blame] | 182 | #define H2_SF_HEADERS_SENT 0x00001000 // a HEADERS frame was sent for this stream |
Willy Tarreau | c4312d3 | 2017-11-07 12:01:53 +0100 | [diff] [blame] | 183 | #define H2_SF_OUTGOING_DATA 0x00002000 // set whenever we've seen outgoing data |
Willy Tarreau | 6743420 | 2017-11-06 20:20:51 +0100 | [diff] [blame] | 184 | |
Willy Tarreau | 6cc85a5 | 2019-01-02 15:49:20 +0100 | [diff] [blame] | 185 | #define H2_SF_HEADERS_RCVD 0x00004000 // a HEADERS frame was received for this stream |
| 186 | |
Willy Tarreau | 2c249eb | 2019-05-13 18:06:17 +0200 | [diff] [blame] | 187 | #define H2_SF_WANT_SHUTR 0x00008000 // a stream couldn't shutr() (mux full/busy) |
| 188 | #define H2_SF_WANT_SHUTW 0x00010000 // a stream couldn't shutw() (mux full/busy) |
Willy Tarreau | 3cf69fe | 2019-05-14 10:44:40 +0200 | [diff] [blame] | 189 | #define H2_SF_KILL_CONN 0x00020000 // kill the whole connection with this stream |
Willy Tarreau | 2c249eb | 2019-05-13 18:06:17 +0200 | [diff] [blame] | 190 | |
| 191 | |
Willy Tarreau | 1831264 | 2017-10-11 07:57:07 +0200 | [diff] [blame] | 192 | /* H2 stream descriptor, describing the stream as it appears in the H2C, and as |
| 193 | * it is being processed in the internal HTTP representation (H1 for now). |
| 194 | */ |
| 195 | struct h2s { |
| 196 | struct conn_stream *cs; |
Olivier Houchard | f502aca | 2018-12-14 19:42:40 +0100 | [diff] [blame] | 197 | struct session *sess; |
Willy Tarreau | 1831264 | 2017-10-11 07:57:07 +0200 | [diff] [blame] | 198 | struct h2c *h2c; |
Willy Tarreau | a40704a | 2018-09-11 13:52:04 +0200 | [diff] [blame] | 199 | struct h1m h1m; /* request or response parser state for H1 */ |
Willy Tarreau | 1831264 | 2017-10-11 07:57:07 +0200 | [diff] [blame] | 200 | struct eb32_node by_id; /* place in h2c's streams_by_id */ |
Willy Tarreau | 1831264 | 2017-10-11 07:57:07 +0200 | [diff] [blame] | 201 | int32_t id; /* stream ID */ |
| 202 | uint32_t flags; /* H2_SF_* */ |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 203 | int sws; /* stream window size, to be added to the mux's initial window size */ |
Willy Tarreau | 1831264 | 2017-10-11 07:57:07 +0200 | [diff] [blame] | 204 | enum h2_err errcode; /* H2 err code (H2_ERR_*) */ |
| 205 | enum h2_ss st; |
Willy Tarreau | 9c5e22e | 2018-09-11 19:22:14 +0200 | [diff] [blame] | 206 | uint16_t status; /* HTTP response status */ |
Willy Tarreau | 1915ca2 | 2019-01-24 11:49:37 +0100 | [diff] [blame] | 207 | unsigned long long body_len; /* remaining body length according to content-length if H2_SF_DATA_CLEN */ |
Olivier Houchard | 638b799 | 2018-08-16 15:41:52 +0200 | [diff] [blame] | 208 | struct buffer rxbuf; /* receive buffer, always valid (buf_empty or real buffer) */ |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 209 | struct wait_event *subs; /* recv wait_event the conn_stream associated is waiting on (via h2_subscribe) */ |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 210 | struct list list; /* To be used when adding in h2c->send_list or h2c->fctl_lsit */ |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 211 | struct tasklet *shut_tl; /* deferred shutdown tasklet, to retry to send an RST after we failed to, |
| 212 | * in case there's no other subscription to do it */ |
Willy Tarreau | 1831264 | 2017-10-11 07:57:07 +0200 | [diff] [blame] | 213 | }; |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 214 | |
Willy Tarreau | c640514 | 2017-09-21 20:23:50 +0200 | [diff] [blame] | 215 | /* descriptor for an h2 frame header */ |
| 216 | struct h2_fh { |
| 217 | uint32_t len; /* length, host order, 24 bits */ |
| 218 | uint32_t sid; /* stream id, host order, 31 bits */ |
| 219 | uint8_t ft; /* frame type */ |
| 220 | uint8_t ff; /* frame flags */ |
| 221 | }; |
| 222 | |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 223 | /* trace source and events */ |
Willy Tarreau | db3cfff | 2019-08-19 17:56:27 +0200 | [diff] [blame] | 224 | static void h2_trace(enum trace_level level, uint64_t mask, \ |
| 225 | const struct trace_source *src, |
| 226 | const struct ist where, const struct ist func, |
| 227 | const void *a1, const void *a2, const void *a3, const void *a4); |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 228 | |
| 229 | /* The event representation is split like this : |
| 230 | * strm - application layer |
| 231 | * h2s - internal H2 stream |
| 232 | * h2c - internal H2 connection |
| 233 | * conn - external connection |
| 234 | * |
| 235 | */ |
| 236 | static const struct trace_event h2_trace_events[] = { |
| 237 | #define H2_EV_H2C_NEW (1ULL << 0) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 238 | { .mask = H2_EV_H2C_NEW, .name = "h2c_new", .desc = "new H2 connection" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 239 | #define H2_EV_H2C_RECV (1ULL << 1) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 240 | { .mask = H2_EV_H2C_RECV, .name = "h2c_recv", .desc = "Rx on H2 connection" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 241 | #define H2_EV_H2C_SEND (1ULL << 2) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 242 | { .mask = H2_EV_H2C_SEND, .name = "h2c_send", .desc = "Tx on H2 connection" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 243 | #define H2_EV_H2C_FCTL (1ULL << 3) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 244 | { .mask = H2_EV_H2C_FCTL, .name = "h2c_fctl", .desc = "H2 connection flow-controlled" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 245 | #define H2_EV_H2C_BLK (1ULL << 4) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 246 | { .mask = H2_EV_H2C_BLK, .name = "h2c_blk", .desc = "H2 connection blocked" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 247 | #define H2_EV_H2C_WAKE (1ULL << 5) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 248 | { .mask = H2_EV_H2C_WAKE, .name = "h2c_wake", .desc = "H2 connection woken up" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 249 | #define H2_EV_H2C_END (1ULL << 6) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 250 | { .mask = H2_EV_H2C_END, .name = "h2c_end", .desc = "H2 connection terminated" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 251 | #define H2_EV_H2C_ERR (1ULL << 7) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 252 | { .mask = H2_EV_H2C_ERR, .name = "h2c_err", .desc = "error on H2 connection" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 253 | #define H2_EV_RX_FHDR (1ULL << 8) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 254 | { .mask = H2_EV_RX_FHDR, .name = "rx_fhdr", .desc = "H2 frame header received" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 255 | #define H2_EV_RX_FRAME (1ULL << 9) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 256 | { .mask = H2_EV_RX_FRAME, .name = "rx_frame", .desc = "receipt of any H2 frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 257 | #define H2_EV_RX_EOI (1ULL << 10) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 258 | { .mask = H2_EV_RX_EOI, .name = "rx_eoi", .desc = "receipt of end of H2 input (ES or RST)" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 259 | #define H2_EV_RX_PREFACE (1ULL << 11) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 260 | { .mask = H2_EV_RX_PREFACE, .name = "rx_preface", .desc = "receipt of H2 preface" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 261 | #define H2_EV_RX_DATA (1ULL << 12) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 262 | { .mask = H2_EV_RX_DATA, .name = "rx_data", .desc = "receipt of H2 DATA frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 263 | #define H2_EV_RX_HDR (1ULL << 13) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 264 | { .mask = H2_EV_RX_HDR, .name = "rx_hdr", .desc = "receipt of H2 HEADERS frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 265 | #define H2_EV_RX_PRIO (1ULL << 14) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 266 | { .mask = H2_EV_RX_PRIO, .name = "rx_prio", .desc = "receipt of H2 PRIORITY frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 267 | #define H2_EV_RX_RST (1ULL << 15) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 268 | { .mask = H2_EV_RX_RST, .name = "rx_rst", .desc = "receipt of H2 RST_STREAM frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 269 | #define H2_EV_RX_SETTINGS (1ULL << 16) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 270 | { .mask = H2_EV_RX_SETTINGS, .name = "rx_settings", .desc = "receipt of H2 SETTINGS frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 271 | #define H2_EV_RX_PUSH (1ULL << 17) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 272 | { .mask = H2_EV_RX_PUSH, .name = "rx_push", .desc = "receipt of H2 PUSH_PROMISE frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 273 | #define H2_EV_RX_PING (1ULL << 18) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 274 | { .mask = H2_EV_RX_PING, .name = "rx_ping", .desc = "receipt of H2 PING frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 275 | #define H2_EV_RX_GOAWAY (1ULL << 19) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 276 | { .mask = H2_EV_RX_GOAWAY, .name = "rx_goaway", .desc = "receipt of H2 GOAWAY frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 277 | #define H2_EV_RX_WU (1ULL << 20) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 278 | { .mask = H2_EV_RX_WU, .name = "rx_wu", .desc = "receipt of H2 WINDOW_UPDATE frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 279 | #define H2_EV_RX_CONT (1ULL << 21) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 280 | { .mask = H2_EV_RX_CONT, .name = "rx_cont", .desc = "receipt of H2 CONTINUATION frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 281 | #define H2_EV_TX_FRAME (1ULL << 22) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 282 | { .mask = H2_EV_TX_FRAME, .name = "tx_frame", .desc = "transmission of any H2 frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 283 | #define H2_EV_TX_EOI (1ULL << 23) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 284 | { .mask = H2_EV_TX_EOI, .name = "tx_eoi", .desc = "transmission of H2 end of input (ES or RST)" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 285 | #define H2_EV_TX_PREFACE (1ULL << 24) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 286 | { .mask = H2_EV_TX_PREFACE, .name = "tx_preface", .desc = "transmission of H2 preface" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 287 | #define H2_EV_TX_DATA (1ULL << 25) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 288 | { .mask = H2_EV_TX_DATA, .name = "tx_data", .desc = "transmission of H2 DATA frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 289 | #define H2_EV_TX_HDR (1ULL << 26) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 290 | { .mask = H2_EV_TX_HDR, .name = "tx_hdr", .desc = "transmission of H2 HEADERS frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 291 | #define H2_EV_TX_PRIO (1ULL << 27) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 292 | { .mask = H2_EV_TX_PRIO, .name = "tx_prio", .desc = "transmission of H2 PRIORITY frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 293 | #define H2_EV_TX_RST (1ULL << 28) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 294 | { .mask = H2_EV_TX_RST, .name = "tx_rst", .desc = "transmission of H2 RST_STREAM frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 295 | #define H2_EV_TX_SETTINGS (1ULL << 29) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 296 | { .mask = H2_EV_TX_SETTINGS, .name = "tx_settings", .desc = "transmission of H2 SETTINGS frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 297 | #define H2_EV_TX_PUSH (1ULL << 30) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 298 | { .mask = H2_EV_TX_PUSH, .name = "tx_push", .desc = "transmission of H2 PUSH_PROMISE frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 299 | #define H2_EV_TX_PING (1ULL << 31) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 300 | { .mask = H2_EV_TX_PING, .name = "tx_ping", .desc = "transmission of H2 PING frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 301 | #define H2_EV_TX_GOAWAY (1ULL << 32) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 302 | { .mask = H2_EV_TX_GOAWAY, .name = "tx_goaway", .desc = "transmission of H2 GOAWAY frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 303 | #define H2_EV_TX_WU (1ULL << 33) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 304 | { .mask = H2_EV_TX_WU, .name = "tx_wu", .desc = "transmission of H2 WINDOW_UPDATE frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 305 | #define H2_EV_TX_CONT (1ULL << 34) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 306 | { .mask = H2_EV_TX_CONT, .name = "tx_cont", .desc = "transmission of H2 CONTINUATION frame" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 307 | #define H2_EV_H2S_NEW (1ULL << 35) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 308 | { .mask = H2_EV_H2S_NEW, .name = "h2s_new", .desc = "new H2 stream" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 309 | #define H2_EV_H2S_RECV (1ULL << 36) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 310 | { .mask = H2_EV_H2S_RECV, .name = "h2s_recv", .desc = "Rx for H2 stream" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 311 | #define H2_EV_H2S_SEND (1ULL << 37) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 312 | { .mask = H2_EV_H2S_SEND, .name = "h2s_send", .desc = "Tx for H2 stream" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 313 | #define H2_EV_H2S_FCTL (1ULL << 38) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 314 | { .mask = H2_EV_H2S_FCTL, .name = "h2s_fctl", .desc = "H2 stream flow-controlled" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 315 | #define H2_EV_H2S_BLK (1ULL << 39) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 316 | { .mask = H2_EV_H2S_BLK, .name = "h2s_blk", .desc = "H2 stream blocked" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 317 | #define H2_EV_H2S_WAKE (1ULL << 40) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 318 | { .mask = H2_EV_H2S_WAKE, .name = "h2s_wake", .desc = "H2 stream woken up" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 319 | #define H2_EV_H2S_END (1ULL << 41) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 320 | { .mask = H2_EV_H2S_END, .name = "h2s_end", .desc = "H2 stream terminated" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 321 | #define H2_EV_H2S_ERR (1ULL << 42) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 322 | { .mask = H2_EV_H2S_ERR, .name = "h2s_err", .desc = "error on H2 stream" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 323 | #define H2_EV_STRM_NEW (1ULL << 43) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 324 | { .mask = H2_EV_STRM_NEW, .name = "strm_new", .desc = "app-layer stream creation" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 325 | #define H2_EV_STRM_RECV (1ULL << 44) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 326 | { .mask = H2_EV_STRM_RECV, .name = "strm_recv", .desc = "receiving data for stream" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 327 | #define H2_EV_STRM_SEND (1ULL << 45) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 328 | { .mask = H2_EV_STRM_SEND, .name = "strm_send", .desc = "sending data for stream" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 329 | #define H2_EV_STRM_FULL (1ULL << 46) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 330 | { .mask = H2_EV_STRM_FULL, .name = "strm_full", .desc = "stream buffer full" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 331 | #define H2_EV_STRM_WAKE (1ULL << 47) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 332 | { .mask = H2_EV_STRM_WAKE, .name = "strm_wake", .desc = "stream woken up" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 333 | #define H2_EV_STRM_SHUT (1ULL << 48) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 334 | { .mask = H2_EV_STRM_SHUT, .name = "strm_shut", .desc = "stream shutdown" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 335 | #define H2_EV_STRM_END (1ULL << 49) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 336 | { .mask = H2_EV_STRM_END, .name = "strm_end", .desc = "detaching app-layer stream" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 337 | #define H2_EV_STRM_ERR (1ULL << 50) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 338 | { .mask = H2_EV_STRM_ERR, .name = "strm_err", .desc = "stream error" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 339 | #define H2_EV_PROTO_ERR (1ULL << 51) |
Willy Tarreau | 8795194 | 2019-08-30 07:34:36 +0200 | [diff] [blame] | 340 | { .mask = H2_EV_PROTO_ERR, .name = "proto_err", .desc = "protocol error" }, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 341 | { } |
| 342 | }; |
| 343 | |
| 344 | static const struct name_desc h2_trace_lockon_args[4] = { |
| 345 | /* arg1 */ { /* already used by the connection */ }, |
| 346 | /* arg2 */ { .name="h2s", .desc="H2 stream" }, |
| 347 | /* arg3 */ { }, |
| 348 | /* arg4 */ { } |
| 349 | }; |
| 350 | |
| 351 | static const struct name_desc h2_trace_decoding[] = { |
Willy Tarreau | f7dd519 | 2019-08-30 07:21:18 +0200 | [diff] [blame] | 352 | #define H2_VERB_CLEAN 1 |
| 353 | { .name="clean", .desc="only user-friendly stuff, generally suitable for level \"user\"" }, |
| 354 | #define H2_VERB_MINIMAL 2 |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 355 | { .name="minimal", .desc="report only h2c/h2s state and flags, no real decoding" }, |
Willy Tarreau | f7dd519 | 2019-08-30 07:21:18 +0200 | [diff] [blame] | 356 | #define H2_VERB_SIMPLE 3 |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 357 | { .name="simple", .desc="add request/response status line or frame info when available" }, |
Willy Tarreau | f7dd519 | 2019-08-30 07:21:18 +0200 | [diff] [blame] | 358 | #define H2_VERB_ADVANCED 4 |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 359 | { .name="advanced", .desc="add header fields or frame decoding when available" }, |
Willy Tarreau | f7dd519 | 2019-08-30 07:21:18 +0200 | [diff] [blame] | 360 | #define H2_VERB_COMPLETE 5 |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 361 | { .name="complete", .desc="add full data dump when available" }, |
| 362 | { /* end */ } |
| 363 | }; |
| 364 | |
| 365 | static struct trace_source trace_h2 = { |
| 366 | .name = IST("h2"), |
| 367 | .desc = "HTTP/2 multiplexer", |
| 368 | .arg_def = TRC_ARG1_CONN, // TRACE()'s first argument is always a connection |
Willy Tarreau | db3cfff | 2019-08-19 17:56:27 +0200 | [diff] [blame] | 369 | .default_cb = h2_trace, |
Willy Tarreau | 12ae212 | 2019-08-08 18:23:12 +0200 | [diff] [blame] | 370 | .known_events = h2_trace_events, |
| 371 | .lockon_args = h2_trace_lockon_args, |
| 372 | .decoding = h2_trace_decoding, |
| 373 | .report_events = ~0, // report everything by default |
| 374 | }; |
| 375 | |
| 376 | #define TRACE_SOURCE &trace_h2 |
| 377 | INITCALL1(STG_REGISTER, trace_register_source, TRACE_SOURCE); |
| 378 | |
Willy Tarreau | 8ceae72 | 2018-11-26 11:58:30 +0100 | [diff] [blame] | 379 | /* the h2c connection pool */ |
| 380 | DECLARE_STATIC_POOL(pool_head_h2c, "h2c", sizeof(struct h2c)); |
| 381 | |
| 382 | /* the h2s stream pool */ |
| 383 | DECLARE_STATIC_POOL(pool_head_h2s, "h2s", sizeof(struct h2s)); |
| 384 | |
Willy Tarreau | dc57236 | 2018-12-12 08:08:05 +0100 | [diff] [blame] | 385 | /* The default connection window size is 65535, it may only be enlarged using |
| 386 | * a WINDOW_UPDATE message. Since the window must never be larger than 2G-1, |
| 387 | * we'll pretend we already received the difference between the two to send |
| 388 | * an equivalent window update to enlarge it to 2G-1. |
| 389 | */ |
| 390 | #define H2_INITIAL_WINDOW_INCREMENT ((1U<<31)-1 - 65535) |
| 391 | |
Willy Tarreau | 455d568 | 2019-05-24 19:42:18 +0200 | [diff] [blame] | 392 | /* maximum amount of data we're OK with re-aligning for buffer optimizations */ |
| 393 | #define MAX_DATA_REALIGN 1024 |
| 394 | |
Willy Tarreau | fe20e5b | 2017-07-27 11:42:14 +0200 | [diff] [blame] | 395 | /* a few settings from the global section */ |
| 396 | static int h2_settings_header_table_size = 4096; /* initial value */ |
Willy Tarreau | e6baec0 | 2017-07-27 11:45:11 +0200 | [diff] [blame] | 397 | static int h2_settings_initial_window_size = 65535; /* initial value */ |
Willy Tarreau | 5a490b6 | 2019-01-31 10:39:51 +0100 | [diff] [blame] | 398 | static unsigned int h2_settings_max_concurrent_streams = 100; |
Willy Tarreau | a24b35c | 2019-02-21 13:24:36 +0100 | [diff] [blame] | 399 | static int h2_settings_max_frame_size = 0; /* unset */ |
Willy Tarreau | fe20e5b | 2017-07-27 11:42:14 +0200 | [diff] [blame] | 400 | |
Willy Tarreau | 2a85618 | 2017-05-16 15:20:39 +0200 | [diff] [blame] | 401 | /* a dmumy closed stream */ |
| 402 | static const struct h2s *h2_closed_stream = &(const struct h2s){ |
| 403 | .cs = NULL, |
| 404 | .h2c = NULL, |
| 405 | .st = H2_SS_CLOSED, |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 406 | .errcode = H2_ERR_STREAM_CLOSED, |
Willy Tarreau | ab83750 | 2017-12-27 15:07:30 +0100 | [diff] [blame] | 407 | .flags = H2_SF_RST_RCVD, |
Willy Tarreau | 2a85618 | 2017-05-16 15:20:39 +0200 | [diff] [blame] | 408 | .id = 0, |
| 409 | }; |
| 410 | |
Willy Tarreau | ecb9dcd | 2019-01-03 12:00:17 +0100 | [diff] [blame] | 411 | /* a dmumy closed stream returning a PROTOCOL_ERROR error */ |
| 412 | static const struct h2s *h2_error_stream = &(const struct h2s){ |
| 413 | .cs = NULL, |
| 414 | .h2c = NULL, |
| 415 | .st = H2_SS_CLOSED, |
| 416 | .errcode = H2_ERR_PROTOCOL_ERROR, |
| 417 | .flags = 0, |
| 418 | .id = 0, |
| 419 | }; |
| 420 | |
Willy Tarreau | 8d0d58b | 2018-12-23 18:29:12 +0100 | [diff] [blame] | 421 | /* a dmumy closed stream returning a REFUSED_STREAM error */ |
| 422 | static const struct h2s *h2_refused_stream = &(const struct h2s){ |
| 423 | .cs = NULL, |
| 424 | .h2c = NULL, |
| 425 | .st = H2_SS_CLOSED, |
| 426 | .errcode = H2_ERR_REFUSED_STREAM, |
| 427 | .flags = 0, |
| 428 | .id = 0, |
| 429 | }; |
| 430 | |
Willy Tarreau | 2a85618 | 2017-05-16 15:20:39 +0200 | [diff] [blame] | 431 | /* and a dummy idle stream for use with any unannounced stream */ |
| 432 | static const struct h2s *h2_idle_stream = &(const struct h2s){ |
| 433 | .cs = NULL, |
| 434 | .h2c = NULL, |
| 435 | .st = H2_SS_IDLE, |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 436 | .errcode = H2_ERR_STREAM_CLOSED, |
Willy Tarreau | 2a85618 | 2017-05-16 15:20:39 +0200 | [diff] [blame] | 437 | .id = 0, |
| 438 | }; |
| 439 | |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 440 | static struct task *h2_timeout_task(struct task *t, void *context, unsigned short state); |
Olivier Houchard | d4dd22d | 2018-08-17 18:39:46 +0200 | [diff] [blame] | 441 | static int h2_send(struct h2c *h2c); |
| 442 | static int h2_recv(struct h2c *h2c); |
Olivier Houchard | 7505f94 | 2018-08-21 18:10:44 +0200 | [diff] [blame] | 443 | static int h2_process(struct h2c *h2c); |
Olivier Houchard | 29fb89d | 2018-08-02 18:56:36 +0200 | [diff] [blame] | 444 | static struct task *h2_io_cb(struct task *t, void *ctx, unsigned short state); |
Willy Tarreau | 0b55907 | 2018-02-26 15:22:17 +0100 | [diff] [blame] | 445 | static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id); |
Willy Tarreau | 4790f7c | 2019-01-24 11:33:02 +0100 | [diff] [blame] | 446 | static int h2c_decode_headers(struct h2c *h2c, struct buffer *rxbuf, uint32_t *flags, unsigned long long *body_len); |
Willy Tarreau | a56a6de | 2018-02-26 15:59:07 +0100 | [diff] [blame] | 447 | static int h2_frt_transfer_data(struct h2s *h2s); |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 448 | static struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned short state); |
Olivier Houchard | f502aca | 2018-12-14 19:42:40 +0100 | [diff] [blame] | 449 | static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess); |
Willy Tarreau | 8b2757c | 2018-12-19 17:36:48 +0100 | [diff] [blame] | 450 | static void h2s_alert(struct h2s *h2s); |
Willy Tarreau | fe20e5b | 2017-07-27 11:42:14 +0200 | [diff] [blame] | 451 | |
Willy Tarreau | ab2ec45 | 2019-08-30 07:07:08 +0200 | [diff] [blame] | 452 | /* returns a h2c state as an abbreviated 3-letter string, or "???" if unknown */ |
| 453 | static inline const char *h2c_st_to_str(enum h2_cs st) |
| 454 | { |
| 455 | switch (st) { |
| 456 | case H2_CS_PREFACE: return "PRF"; |
| 457 | case H2_CS_SETTINGS1: return "STG"; |
| 458 | case H2_CS_FRAME_H: return "FRH"; |
| 459 | case H2_CS_FRAME_P: return "FRP"; |
| 460 | case H2_CS_FRAME_A: return "FRA"; |
| 461 | case H2_CS_FRAME_E: return "FRE"; |
| 462 | case H2_CS_ERROR: return "ERR"; |
| 463 | case H2_CS_ERROR2: return "ER2"; |
| 464 | default: return "???"; |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | /* returns a h2s state as an abbreviated 3-letter string, or "???" if unknown */ |
| 469 | static inline const char *h2s_st_to_str(enum h2_ss st) |
| 470 | { |
| 471 | switch (st) { |
| 472 | case H2_SS_IDLE: return "IDL"; // idle |
| 473 | case H2_SS_RLOC: return "RSL"; // reserved local |
| 474 | case H2_SS_RREM: return "RSR"; // reserved remote |
| 475 | case H2_SS_OPEN: return "OPN"; // open |
| 476 | case H2_SS_HREM: return "HCR"; // half-closed remote |
| 477 | case H2_SS_HLOC: return "HCL"; // half-closed local |
| 478 | case H2_SS_ERROR : return "ERR"; // error |
| 479 | case H2_SS_CLOSED: return "CLO"; // closed |
| 480 | default: return "???"; |
| 481 | } |
| 482 | } |
| 483 | |
Willy Tarreau | db3cfff | 2019-08-19 17:56:27 +0200 | [diff] [blame] | 484 | /* the H2 traces always expect that arg1, if non-null, is of type connection |
| 485 | * (from which we can derive h2c), that arg2, if non-null, is of type h2s, and |
| 486 | * that arg3, if non-null, is either of type htx for tx headers, or of type |
| 487 | * buffer for everything else. |
| 488 | */ |
| 489 | static void h2_trace(enum trace_level level, uint64_t mask, const struct trace_source *src, |
| 490 | const struct ist where, const struct ist func, |
| 491 | const void *a1, const void *a2, const void *a3, const void *a4) |
| 492 | { |
| 493 | const struct connection *conn = a1; |
| 494 | const struct h2c *h2c = conn ? conn->ctx : NULL; |
| 495 | const struct h2s *h2s = a2; |
| 496 | const struct buffer *buf = a3; |
| 497 | const struct htx *htx; |
| 498 | int pos; |
| 499 | |
| 500 | if (!h2c) // nothing to add |
| 501 | return; |
| 502 | |
Willy Tarreau | 17104d4 | 2019-08-30 07:12:55 +0200 | [diff] [blame] | 503 | if (src->verbosity > H2_VERB_CLEAN) { |
Willy Tarreau | 73db434 | 2019-09-25 07:28:44 +0200 | [diff] [blame] | 504 | chunk_appendf(&trace_buf, " : h2c=%p(%c,%s)", h2c, conn_is_back(conn) ? 'B' : 'F', h2c_st_to_str(h2c->st0)); |
| 505 | |
Willy Tarreau | f3ce041 | 2019-11-24 14:57:00 +0100 | [diff] [blame] | 506 | if (h2c->errcode) |
| 507 | chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2c->errcode), h2c->errcode); |
| 508 | |
Willy Tarreau | 73db434 | 2019-09-25 07:28:44 +0200 | [diff] [blame] | 509 | if (h2c->dsi >= 0 && |
| 510 | (mask & (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) == (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) { |
| 511 | chunk_appendf(&trace_buf, " dft=%s/%02x", h2_ft_str(h2c->dft), h2c->dff); |
| 512 | } |
| 513 | |
| 514 | if (h2s) { |
| 515 | if (h2s->id <= 0) |
| 516 | chunk_appendf(&trace_buf, " dsi=%d", h2c->dsi); |
| 517 | chunk_appendf(&trace_buf, " h2s=%p(%d,%s)", h2s, h2s->id, h2s_st_to_str(h2s->st)); |
Willy Tarreau | f3ce041 | 2019-11-24 14:57:00 +0100 | [diff] [blame] | 518 | if (h2s->id && h2s->errcode) |
| 519 | chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2s->errcode), h2s->errcode); |
Willy Tarreau | 73db434 | 2019-09-25 07:28:44 +0200 | [diff] [blame] | 520 | } |
Willy Tarreau | db3cfff | 2019-08-19 17:56:27 +0200 | [diff] [blame] | 521 | } |
| 522 | |
| 523 | /* Let's dump decoded requests and responses right after parsing. They |
| 524 | * are traced at level USER with a few recognizable flags. |
| 525 | */ |
| 526 | if ((mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW) || |
| 527 | mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR)) && buf) |
| 528 | htx = htxbuf(buf); // recv req/res |
| 529 | else if (mask == (H2_EV_TX_FRAME|H2_EV_TX_HDR)) |
| 530 | htx = a3; // send req/res |
| 531 | else |
| 532 | htx = NULL; |
| 533 | |
Willy Tarreau | 94f1dcf | 2019-08-30 07:11:30 +0200 | [diff] [blame] | 534 | if (level == TRACE_LEVEL_USER && src->verbosity != H2_VERB_MINIMAL && htx && (pos = htx_get_head(htx)) != -1) { |
Willy Tarreau | db3cfff | 2019-08-19 17:56:27 +0200 | [diff] [blame] | 535 | const struct htx_blk *blk = htx_get_blk(htx, pos); |
| 536 | const struct htx_sl *sl = htx_get_blk_ptr(htx, blk); |
| 537 | enum htx_blk_type type = htx_get_blk_type(blk); |
| 538 | |
| 539 | if (type == HTX_BLK_REQ_SL) |
| 540 | chunk_appendf(&trace_buf, " : [%d] H2 REQ: %.*s %.*s %.*s", |
Willy Tarreau | c067a3a | 2019-08-30 07:28:24 +0200 | [diff] [blame] | 541 | h2s ? h2s->id : h2c->dsi, |
Willy Tarreau | db3cfff | 2019-08-19 17:56:27 +0200 | [diff] [blame] | 542 | HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl), |
| 543 | HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl), |
| 544 | HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl)); |
| 545 | else if (type == HTX_BLK_RES_SL) |
| 546 | chunk_appendf(&trace_buf, " : [%d] H2 RES: %.*s %.*s %.*s", |
Willy Tarreau | c067a3a | 2019-08-30 07:28:24 +0200 | [diff] [blame] | 547 | h2s ? h2s->id : h2c->dsi, |
Willy Tarreau | db3cfff | 2019-08-19 17:56:27 +0200 | [diff] [blame] | 548 | HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl), |
| 549 | HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl), |
| 550 | HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl)); |
| 551 | } |
| 552 | } |
| 553 | |
Willy Tarreau | c2ea47f | 2019-10-01 10:12:00 +0200 | [diff] [blame] | 554 | /* returns true if the connection is allowed to expire, false otherwise. A |
| 555 | * connection may expire when: |
| 556 | * - it has no stream |
| 557 | * - it has data in the mux buffer |
| 558 | * - it has streams in the blocked list |
| 559 | * - it has streams in the fctl list |
| 560 | * - it has streams in the send list |
| 561 | * Otherwise it means some streams are waiting in the data layer and it should |
| 562 | * not expire. |
| 563 | */ |
| 564 | static inline int h2c_may_expire(const struct h2c *h2c) |
| 565 | { |
| 566 | return eb_is_empty(&h2c->streams_by_id) || |
| 567 | br_data(h2c->mbuf) || |
| 568 | !LIST_ISEMPTY(&h2c->blocked_list) || |
| 569 | !LIST_ISEMPTY(&h2c->fctl_list) || |
Willy Tarreau | d946416 | 2020-01-10 18:25:07 +0100 | [diff] [blame] | 570 | !LIST_ISEMPTY(&h2c->send_list); |
Willy Tarreau | c2ea47f | 2019-10-01 10:12:00 +0200 | [diff] [blame] | 571 | } |
| 572 | |
Olivier Houchard | 7a97743 | 2019-03-21 15:47:13 +0100 | [diff] [blame] | 573 | static __inline int |
Willy Tarreau | c2ea47f | 2019-10-01 10:12:00 +0200 | [diff] [blame] | 574 | h2c_is_dead(const struct h2c *h2c) |
Olivier Houchard | 7a97743 | 2019-03-21 15:47:13 +0100 | [diff] [blame] | 575 | { |
| 576 | if (eb_is_empty(&h2c->streams_by_id) && /* don't close if streams exist */ |
| 577 | ((h2c->conn->flags & CO_FL_ERROR) || /* errors close immediately */ |
| 578 | (h2c->st0 >= H2_CS_ERROR && !h2c->task) || /* a timeout stroke earlier */ |
| 579 | (!(h2c->conn->owner)) || /* Nobody's left to take care of the connection, drop it now */ |
Willy Tarreau | 662fafc | 2019-05-26 09:43:07 +0200 | [diff] [blame] | 580 | (!br_data(h2c->mbuf) && /* mux buffer empty, also process clean events below */ |
Olivier Houchard | 7a97743 | 2019-03-21 15:47:13 +0100 | [diff] [blame] | 581 | (conn_xprt_read0_pending(h2c->conn) || |
| 582 | (h2c->last_sid >= 0 && h2c->max_id >= h2c->last_sid))))) |
| 583 | return 1; |
| 584 | |
| 585 | return 0; |
Olivier Houchard | 7a97743 | 2019-03-21 15:47:13 +0100 | [diff] [blame] | 586 | } |
| 587 | |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame] | 588 | /*****************************************************/ |
| 589 | /* functions below are for dynamic buffer management */ |
| 590 | /*****************************************************/ |
| 591 | |
Willy Tarreau | 315d807 | 2017-12-10 22:17:57 +0100 | [diff] [blame] | 592 | /* indicates whether or not the we may call the h2_recv() function to attempt |
| 593 | * to receive data into the buffer and/or demux pending data. The condition is |
| 594 | * a bit complex due to some API limits for now. The rules are the following : |
| 595 | * - if an error or a shutdown was detected on the connection and the buffer |
| 596 | * is empty, we must not attempt to receive |
| 597 | * - if the demux buf failed to be allocated, we must not try to receive and |
| 598 | * we know there is nothing pending |
Willy Tarreau | 6042aeb | 2017-12-12 11:01:44 +0100 | [diff] [blame] | 599 | * - if no flag indicates a blocking condition, we may attempt to receive, |
| 600 | * regardless of whether the demux buffer is full or not, so that only |
| 601 | * de demux part decides whether or not to block. This is needed because |
| 602 | * the connection API indeed prevents us from re-enabling receipt that is |
| 603 | * already enabled in a polled state, so we must always immediately stop |
| 604 | * as soon as the demux can't proceed so as never to hit an end of read |
| 605 | * with data pending in the buffers. |
Willy Tarreau | 315d807 | 2017-12-10 22:17:57 +0100 | [diff] [blame] | 606 | * - otherwise must may not attempt |
| 607 | */ |
| 608 | static inline int h2_recv_allowed(const struct h2c *h2c) |
| 609 | { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 610 | if (b_data(&h2c->dbuf) == 0 && |
Willy Tarreau | 315d807 | 2017-12-10 22:17:57 +0100 | [diff] [blame] | 611 | (h2c->st0 >= H2_CS_ERROR || |
| 612 | h2c->conn->flags & CO_FL_ERROR || |
| 613 | conn_xprt_read0_pending(h2c->conn))) |
| 614 | return 0; |
| 615 | |
| 616 | if (!(h2c->flags & H2_CF_DEM_DALLOC) && |
Willy Tarreau | 6042aeb | 2017-12-12 11:01:44 +0100 | [diff] [blame] | 617 | !(h2c->flags & H2_CF_DEM_BLOCK_ANY)) |
Willy Tarreau | 315d807 | 2017-12-10 22:17:57 +0100 | [diff] [blame] | 618 | return 1; |
| 619 | |
| 620 | return 0; |
| 621 | } |
| 622 | |
Willy Tarreau | 47b515a | 2018-12-21 16:09:41 +0100 | [diff] [blame] | 623 | /* restarts reading on the connection if it was not enabled */ |
Olivier Houchard | 3ca18bf | 2019-04-05 15:34:34 +0200 | [diff] [blame] | 624 | static inline void h2c_restart_reading(const struct h2c *h2c, int consider_buffer) |
Willy Tarreau | 47b515a | 2018-12-21 16:09:41 +0100 | [diff] [blame] | 625 | { |
| 626 | if (!h2_recv_allowed(h2c)) |
| 627 | return; |
Olivier Houchard | 3ca18bf | 2019-04-05 15:34:34 +0200 | [diff] [blame] | 628 | if ((!consider_buffer || !b_data(&h2c->dbuf)) |
| 629 | && (h2c->wait_event.events & SUB_RETRY_RECV)) |
Willy Tarreau | 47b515a | 2018-12-21 16:09:41 +0100 | [diff] [blame] | 630 | return; |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 631 | tasklet_wakeup(h2c->wait_event.tasklet); |
Willy Tarreau | 47b515a | 2018-12-21 16:09:41 +0100 | [diff] [blame] | 632 | } |
| 633 | |
| 634 | |
Willy Tarreau | fa1d357 | 2019-01-31 10:31:51 +0100 | [diff] [blame] | 635 | /* returns true if the front connection has too many conn_streams attached */ |
| 636 | static inline int h2_frt_has_too_many_cs(const struct h2c *h2c) |
Willy Tarreau | f210191 | 2018-07-19 10:11:38 +0200 | [diff] [blame] | 637 | { |
Willy Tarreau | a875466 | 2018-12-23 20:43:58 +0100 | [diff] [blame] | 638 | return h2c->nb_cs > h2_settings_max_concurrent_streams; |
Willy Tarreau | f210191 | 2018-07-19 10:11:38 +0200 | [diff] [blame] | 639 | } |
| 640 | |
Willy Tarreau | 44e973f | 2018-03-01 17:49:30 +0100 | [diff] [blame] | 641 | /* Tries to grab a buffer and to re-enable processing on mux <target>. The h2c |
| 642 | * flags are used to figure what buffer was requested. It returns 1 if the |
| 643 | * allocation succeeds, in which case the connection is woken up, or 0 if it's |
| 644 | * impossible to wake up and we prefer to be woken up later. |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame] | 645 | */ |
Willy Tarreau | 44e973f | 2018-03-01 17:49:30 +0100 | [diff] [blame] | 646 | static int h2_buf_available(void *target) |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame] | 647 | { |
| 648 | struct h2c *h2c = target; |
Willy Tarreau | 0b55907 | 2018-02-26 15:22:17 +0100 | [diff] [blame] | 649 | struct h2s *h2s; |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame] | 650 | |
Willy Tarreau | 44e973f | 2018-03-01 17:49:30 +0100 | [diff] [blame] | 651 | if ((h2c->flags & H2_CF_DEM_DALLOC) && b_alloc_margin(&h2c->dbuf, 0)) { |
Willy Tarreau | 1b62c5c | 2017-09-25 11:55:01 +0200 | [diff] [blame] | 652 | h2c->flags &= ~H2_CF_DEM_DALLOC; |
Olivier Houchard | 3ca18bf | 2019-04-05 15:34:34 +0200 | [diff] [blame] | 653 | h2c_restart_reading(h2c, 1); |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame] | 654 | return 1; |
| 655 | } |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame] | 656 | |
Willy Tarreau | 5133096 | 2019-05-26 09:38:07 +0200 | [diff] [blame] | 657 | if ((h2c->flags & H2_CF_MUX_MALLOC) && b_alloc_margin(br_tail(h2c->mbuf), 0)) { |
Willy Tarreau | 44e973f | 2018-03-01 17:49:30 +0100 | [diff] [blame] | 658 | h2c->flags &= ~H2_CF_MUX_MALLOC; |
Willy Tarreau | 1b62c5c | 2017-09-25 11:55:01 +0200 | [diff] [blame] | 659 | |
| 660 | if (h2c->flags & H2_CF_DEM_MROOM) { |
| 661 | h2c->flags &= ~H2_CF_DEM_MROOM; |
Olivier Houchard | 3ca18bf | 2019-04-05 15:34:34 +0200 | [diff] [blame] | 662 | h2c_restart_reading(h2c, 1); |
Willy Tarreau | 1b62c5c | 2017-09-25 11:55:01 +0200 | [diff] [blame] | 663 | } |
Willy Tarreau | 1439812 | 2017-09-22 14:26:04 +0200 | [diff] [blame] | 664 | return 1; |
| 665 | } |
Willy Tarreau | 0b55907 | 2018-02-26 15:22:17 +0100 | [diff] [blame] | 666 | |
| 667 | if ((h2c->flags & H2_CF_DEM_SALLOC) && |
| 668 | (h2s = h2c_st_by_id(h2c, h2c->dsi)) && h2s->cs && |
Olivier Houchard | 638b799 | 2018-08-16 15:41:52 +0200 | [diff] [blame] | 669 | b_alloc_margin(&h2s->rxbuf, 0)) { |
Willy Tarreau | 0b55907 | 2018-02-26 15:22:17 +0100 | [diff] [blame] | 670 | h2c->flags &= ~H2_CF_DEM_SALLOC; |
Olivier Houchard | 3ca18bf | 2019-04-05 15:34:34 +0200 | [diff] [blame] | 671 | h2c_restart_reading(h2c, 1); |
Willy Tarreau | 0b55907 | 2018-02-26 15:22:17 +0100 | [diff] [blame] | 672 | return 1; |
| 673 | } |
| 674 | |
Willy Tarreau | 1439812 | 2017-09-22 14:26:04 +0200 | [diff] [blame] | 675 | return 0; |
| 676 | } |
| 677 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 678 | static inline struct buffer *h2_get_buf(struct h2c *h2c, struct buffer *bptr) |
Willy Tarreau | 1439812 | 2017-09-22 14:26:04 +0200 | [diff] [blame] | 679 | { |
| 680 | struct buffer *buf = NULL; |
| 681 | |
Willy Tarreau | c234ae3 | 2019-05-13 17:56:11 +0200 | [diff] [blame] | 682 | if (likely(!LIST_ADDED(&h2c->buf_wait.list)) && |
Willy Tarreau | 44e973f | 2018-03-01 17:49:30 +0100 | [diff] [blame] | 683 | unlikely((buf = b_alloc_margin(bptr, 0)) == NULL)) { |
| 684 | h2c->buf_wait.target = h2c; |
| 685 | h2c->buf_wait.wakeup_cb = h2_buf_available; |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 686 | HA_SPIN_LOCK(BUF_WQ_LOCK, &buffer_wq_lock); |
Willy Tarreau | 44e973f | 2018-03-01 17:49:30 +0100 | [diff] [blame] | 687 | LIST_ADDQ(&buffer_wq, &h2c->buf_wait.list); |
Christopher Faulet | 2a944ee | 2017-11-07 10:42:54 +0100 | [diff] [blame] | 688 | HA_SPIN_UNLOCK(BUF_WQ_LOCK, &buffer_wq_lock); |
Willy Tarreau | 1439812 | 2017-09-22 14:26:04 +0200 | [diff] [blame] | 689 | __conn_xprt_stop_recv(h2c->conn); |
| 690 | } |
| 691 | return buf; |
| 692 | } |
| 693 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 694 | static inline void h2_release_buf(struct h2c *h2c, struct buffer *bptr) |
Willy Tarreau | 1439812 | 2017-09-22 14:26:04 +0200 | [diff] [blame] | 695 | { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 696 | if (bptr->size) { |
Willy Tarreau | 44e973f | 2018-03-01 17:49:30 +0100 | [diff] [blame] | 697 | b_free(bptr); |
Willy Tarreau | 201840a | 2019-05-29 17:50:48 +0200 | [diff] [blame] | 698 | offer_buffers(NULL, tasks_run_queue); |
Willy Tarreau | 1439812 | 2017-09-22 14:26:04 +0200 | [diff] [blame] | 699 | } |
| 700 | } |
| 701 | |
Willy Tarreau | 2e3c000 | 2019-05-26 09:45:23 +0200 | [diff] [blame] | 702 | static inline void h2_release_mbuf(struct h2c *h2c) |
| 703 | { |
| 704 | struct buffer *buf; |
| 705 | unsigned int count = 0; |
| 706 | |
| 707 | while (b_size(buf = br_head_pick(h2c->mbuf))) { |
| 708 | b_free(buf); |
| 709 | count++; |
| 710 | } |
| 711 | if (count) |
Willy Tarreau | 201840a | 2019-05-29 17:50:48 +0200 | [diff] [blame] | 712 | offer_buffers(NULL, tasks_run_queue); |
Willy Tarreau | 2e3c000 | 2019-05-26 09:45:23 +0200 | [diff] [blame] | 713 | } |
| 714 | |
Willy Tarreau | d64a3eb | 2019-01-23 10:22:21 +0100 | [diff] [blame] | 715 | /* returns the number of allocatable outgoing streams for the connection taking |
| 716 | * the last_sid and the reserved ones into account. |
| 717 | */ |
| 718 | static inline int h2_streams_left(const struct h2c *h2c) |
| 719 | { |
| 720 | int ret; |
| 721 | |
| 722 | /* consider the number of outgoing streams we're allowed to create before |
| 723 | * reaching the last GOAWAY frame seen. max_id is the last assigned id, |
| 724 | * nb_reserved is the number of streams which don't yet have an ID. |
| 725 | */ |
| 726 | ret = (h2c->last_sid >= 0) ? h2c->last_sid : 0x7FFFFFFF; |
| 727 | ret = (unsigned int)(ret - h2c->max_id) / 2 - h2c->nb_reserved - 1; |
| 728 | if (ret < 0) |
| 729 | ret = 0; |
| 730 | return ret; |
| 731 | } |
| 732 | |
Willy Tarreau | 00f18a3 | 2019-01-26 12:19:01 +0100 | [diff] [blame] | 733 | /* returns the number of streams in use on a connection to figure if it's |
| 734 | * idle or not. We check nb_cs and not nb_streams as the caller will want |
| 735 | * to know if it was the last one after a detach(). |
| 736 | */ |
| 737 | static int h2_used_streams(struct connection *conn) |
| 738 | { |
| 739 | struct h2c *h2c = conn->ctx; |
| 740 | |
| 741 | return h2c->nb_cs; |
| 742 | } |
| 743 | |
Willy Tarreau | d64a3eb | 2019-01-23 10:22:21 +0100 | [diff] [blame] | 744 | /* returns the number of concurrent streams available on the connection */ |
Olivier Houchard | d540b36 | 2018-11-05 18:37:53 +0100 | [diff] [blame] | 745 | static int h2_avail_streams(struct connection *conn) |
| 746 | { |
Willy Tarreau | e9634bd | 2019-01-23 10:25:10 +0100 | [diff] [blame] | 747 | struct server *srv = objt_server(conn->target); |
Willy Tarreau | 3d2ee55 | 2018-12-19 14:12:10 +0100 | [diff] [blame] | 748 | struct h2c *h2c = conn->ctx; |
Willy Tarreau | d64a3eb | 2019-01-23 10:22:21 +0100 | [diff] [blame] | 749 | int ret1, ret2; |
Olivier Houchard | d540b36 | 2018-11-05 18:37:53 +0100 | [diff] [blame] | 750 | |
Willy Tarreau | 6afec46 | 2019-01-28 06:40:19 +0100 | [diff] [blame] | 751 | /* RFC7540#6.8: Receivers of a GOAWAY frame MUST NOT open additional |
| 752 | * streams on the connection. |
| 753 | */ |
| 754 | if (h2c->last_sid >= 0) |
| 755 | return 0; |
| 756 | |
Willy Tarreau | c61966f | 2019-10-31 15:10:03 +0100 | [diff] [blame] | 757 | if (h2c->st0 >= H2_CS_ERROR) |
| 758 | return 0; |
| 759 | |
Willy Tarreau | 8694978 | 2019-01-31 10:42:05 +0100 | [diff] [blame] | 760 | /* note: may be negative if a SETTINGS frame changes the limit */ |
| 761 | ret1 = h2c->streams_limit - h2c->nb_streams; |
Willy Tarreau | d64a3eb | 2019-01-23 10:22:21 +0100 | [diff] [blame] | 762 | |
| 763 | /* we must also consider the limit imposed by stream IDs */ |
| 764 | ret2 = h2_streams_left(h2c); |
Willy Tarreau | e9634bd | 2019-01-23 10:25:10 +0100 | [diff] [blame] | 765 | ret1 = MIN(ret1, ret2); |
Willy Tarreau | 8694978 | 2019-01-31 10:42:05 +0100 | [diff] [blame] | 766 | if (ret1 > 0 && srv && srv->max_reuse >= 0) { |
Willy Tarreau | e9634bd | 2019-01-23 10:25:10 +0100 | [diff] [blame] | 767 | ret2 = h2c->stream_cnt <= srv->max_reuse ? srv->max_reuse - h2c->stream_cnt + 1: 0; |
| 768 | ret1 = MIN(ret1, ret2); |
| 769 | } |
| 770 | return ret1; |
Olivier Houchard | d540b36 | 2018-11-05 18:37:53 +0100 | [diff] [blame] | 771 | } |
| 772 | |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame] | 773 | |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 774 | /*****************************************************************/ |
| 775 | /* functions below are dedicated to the mux setup and management */ |
| 776 | /*****************************************************************/ |
| 777 | |
Willy Tarreau | 7dc24e4 | 2018-10-03 13:52:41 +0200 | [diff] [blame] | 778 | /* Initialize the mux once it's attached. For outgoing connections, the context |
| 779 | * is already initialized before installing the mux, so we detect incoming |
Christopher Faulet | 51f73eb | 2019-04-08 11:22:47 +0200 | [diff] [blame] | 780 | * connections from the fact that the context is still NULL (even during mux |
| 781 | * upgrades). <input> is always used as Input buffer and may contain data. It is |
| 782 | * the caller responsibility to not reuse it anymore. Returns < 0 on error. |
Willy Tarreau | 7dc24e4 | 2018-10-03 13:52:41 +0200 | [diff] [blame] | 783 | */ |
Christopher Faulet | 51f73eb | 2019-04-08 11:22:47 +0200 | [diff] [blame] | 784 | static int h2_init(struct connection *conn, struct proxy *prx, struct session *sess, |
| 785 | struct buffer *input) |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 786 | { |
| 787 | struct h2c *h2c; |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 788 | struct task *t = NULL; |
Christopher Faulet | f81ef03 | 2019-10-04 15:19:43 +0200 | [diff] [blame] | 789 | void *conn_ctx = conn->ctx; |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 790 | |
Christopher Faulet | f81ef03 | 2019-10-04 15:19:43 +0200 | [diff] [blame] | 791 | TRACE_ENTER(H2_EV_H2C_NEW); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 792 | |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 793 | h2c = pool_alloc(pool_head_h2c); |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 794 | if (!h2c) |
mildis | cd2d7de | 2018-10-02 16:44:18 +0200 | [diff] [blame] | 795 | goto fail_no_h2c; |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 796 | |
Christopher Faulet | e9b7072 | 2019-04-08 10:46:02 +0200 | [diff] [blame] | 797 | if (conn_is_back(conn)) { |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 798 | h2c->flags = H2_CF_IS_BACK; |
| 799 | h2c->shut_timeout = h2c->timeout = prx->timeout.server; |
| 800 | if (tick_isset(prx->timeout.serverfin)) |
| 801 | h2c->shut_timeout = prx->timeout.serverfin; |
| 802 | } else { |
| 803 | h2c->flags = H2_CF_NONE; |
| 804 | h2c->shut_timeout = h2c->timeout = prx->timeout.client; |
| 805 | if (tick_isset(prx->timeout.clientfin)) |
| 806 | h2c->shut_timeout = prx->timeout.clientfin; |
| 807 | } |
Willy Tarreau | 3f13357 | 2017-10-31 19:21:06 +0100 | [diff] [blame] | 808 | |
Willy Tarreau | 0b37d65 | 2018-10-03 10:33:02 +0200 | [diff] [blame] | 809 | h2c->proxy = prx; |
Willy Tarreau | 3340029 | 2017-11-05 11:23:40 +0100 | [diff] [blame] | 810 | h2c->task = NULL; |
Willy Tarreau | 3f13357 | 2017-10-31 19:21:06 +0100 | [diff] [blame] | 811 | if (tick_isset(h2c->timeout)) { |
| 812 | t = task_new(tid_bit); |
| 813 | if (!t) |
| 814 | goto fail; |
| 815 | |
| 816 | h2c->task = t; |
| 817 | t->process = h2_timeout_task; |
| 818 | t->context = h2c; |
| 819 | t->expire = tick_add(now_ms, h2c->timeout); |
| 820 | } |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 821 | |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 822 | h2c->wait_event.tasklet = tasklet_new(); |
| 823 | if (!h2c->wait_event.tasklet) |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 824 | goto fail; |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 825 | h2c->wait_event.tasklet->process = h2_io_cb; |
| 826 | h2c->wait_event.tasklet->context = h2c; |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 827 | h2c->wait_event.events = 0; |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 828 | |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 829 | h2c->ddht = hpack_dht_alloc(h2_settings_header_table_size); |
| 830 | if (!h2c->ddht) |
| 831 | goto fail; |
| 832 | |
| 833 | /* Initialise the context. */ |
| 834 | h2c->st0 = H2_CS_PREFACE; |
| 835 | h2c->conn = conn; |
Willy Tarreau | 2e2083a | 2019-01-31 10:34:07 +0100 | [diff] [blame] | 836 | h2c->streams_limit = h2_settings_max_concurrent_streams; |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 837 | h2c->max_id = -1; |
| 838 | h2c->errcode = H2_ERR_NO_ERROR; |
Willy Tarreau | 97aaa67 | 2018-12-23 09:49:04 +0100 | [diff] [blame] | 839 | h2c->rcvd_c = 0; |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 840 | h2c->rcvd_s = 0; |
Willy Tarreau | 4974561 | 2017-12-03 18:56:02 +0100 | [diff] [blame] | 841 | h2c->nb_streams = 0; |
Willy Tarreau | 7ac60e8 | 2018-07-19 09:04:05 +0200 | [diff] [blame] | 842 | h2c->nb_cs = 0; |
Willy Tarreau | d64a3eb | 2019-01-23 10:22:21 +0100 | [diff] [blame] | 843 | h2c->nb_reserved = 0; |
Willy Tarreau | e9634bd | 2019-01-23 10:25:10 +0100 | [diff] [blame] | 844 | h2c->stream_cnt = 0; |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 845 | |
Christopher Faulet | 51f73eb | 2019-04-08 11:22:47 +0200 | [diff] [blame] | 846 | h2c->dbuf = *input; |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 847 | h2c->dsi = -1; |
| 848 | h2c->msi = -1; |
Willy Tarreau | e9634bd | 2019-01-23 10:25:10 +0100 | [diff] [blame] | 849 | |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 850 | h2c->last_sid = -1; |
| 851 | |
Willy Tarreau | 5133096 | 2019-05-26 09:38:07 +0200 | [diff] [blame] | 852 | br_init(h2c->mbuf, sizeof(h2c->mbuf) / sizeof(h2c->mbuf[0])); |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 853 | h2c->miw = 65535; /* mux initial window size */ |
| 854 | h2c->mws = 65535; /* mux window size */ |
| 855 | h2c->mfs = 16384; /* initial max frame size */ |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 856 | h2c->streams_by_id = EB_ROOT; |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 857 | LIST_INIT(&h2c->send_list); |
| 858 | LIST_INIT(&h2c->fctl_list); |
Willy Tarreau | 9edf6db | 2019-10-02 10:49:59 +0200 | [diff] [blame] | 859 | LIST_INIT(&h2c->blocked_list); |
Willy Tarreau | 44e973f | 2018-03-01 17:49:30 +0100 | [diff] [blame] | 860 | LIST_INIT(&h2c->buf_wait.list); |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 861 | |
Christopher Faulet | f81ef03 | 2019-10-04 15:19:43 +0200 | [diff] [blame] | 862 | conn->ctx = h2c; |
| 863 | |
Willy Tarreau | 3f13357 | 2017-10-31 19:21:06 +0100 | [diff] [blame] | 864 | if (t) |
| 865 | task_queue(t); |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 866 | |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 867 | if (h2c->flags & H2_CF_IS_BACK) { |
| 868 | /* FIXME: this is temporary, for outgoing connections we need |
| 869 | * to immediately allocate a stream until the code is modified |
| 870 | * so that the caller calls ->attach(). For now the outgoing cs |
Christopher Faulet | f81ef03 | 2019-10-04 15:19:43 +0200 | [diff] [blame] | 871 | * is stored as conn->ctx by the caller and saved in conn_ctx. |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 872 | */ |
| 873 | struct h2s *h2s; |
| 874 | |
Christopher Faulet | f81ef03 | 2019-10-04 15:19:43 +0200 | [diff] [blame] | 875 | h2s = h2c_bck_stream_new(h2c, conn_ctx, sess); |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 876 | if (!h2s) |
| 877 | goto fail_stream; |
| 878 | } |
| 879 | |
Willy Tarreau | 0f38358 | 2018-10-03 14:22:21 +0200 | [diff] [blame] | 880 | /* prepare to read something */ |
Olivier Houchard | 3ca18bf | 2019-04-05 15:34:34 +0200 | [diff] [blame] | 881 | h2c_restart_reading(h2c, 1); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 882 | TRACE_LEAVE(H2_EV_H2C_NEW, conn); |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 883 | return 0; |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 884 | fail_stream: |
| 885 | hpack_dht_free(h2c->ddht); |
mildis | cd2d7de | 2018-10-02 16:44:18 +0200 | [diff] [blame] | 886 | fail: |
Willy Tarreau | f656279 | 2019-05-07 19:05:35 +0200 | [diff] [blame] | 887 | task_destroy(t); |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 888 | if (h2c->wait_event.tasklet) |
| 889 | tasklet_free(h2c->wait_event.tasklet); |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 890 | pool_free(pool_head_h2c, h2c); |
mildis | cd2d7de | 2018-10-02 16:44:18 +0200 | [diff] [blame] | 891 | fail_no_h2c: |
Christopher Faulet | f81ef03 | 2019-10-04 15:19:43 +0200 | [diff] [blame] | 892 | conn->ctx = conn_ctx; /* restore saved ctx */ |
| 893 | TRACE_DEVEL("leaving in error", H2_EV_H2C_NEW|H2_EV_H2C_END|H2_EV_H2C_ERR); |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 894 | return -1; |
| 895 | } |
| 896 | |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 897 | /* returns the next allocatable outgoing stream ID for the H2 connection, or |
| 898 | * -1 if no more is allocatable. |
| 899 | */ |
| 900 | static inline int32_t h2c_get_next_sid(const struct h2c *h2c) |
| 901 | { |
| 902 | int32_t id = (h2c->max_id + 1) | 1; |
Willy Tarreau | a80dca8 | 2019-01-24 17:08:28 +0100 | [diff] [blame] | 903 | |
| 904 | if ((id & 0x80000000U) || (h2c->last_sid >= 0 && id > h2c->last_sid)) |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 905 | id = -1; |
| 906 | return id; |
| 907 | } |
| 908 | |
Willy Tarreau | 2373acc | 2017-10-12 17:35:14 +0200 | [diff] [blame] | 909 | /* returns the stream associated with id <id> or NULL if not found */ |
| 910 | static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id) |
| 911 | { |
| 912 | struct eb32_node *node; |
| 913 | |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 914 | if (id == 0) |
| 915 | return (struct h2s *)h2_closed_stream; |
| 916 | |
Willy Tarreau | 2a85618 | 2017-05-16 15:20:39 +0200 | [diff] [blame] | 917 | if (id > h2c->max_id) |
| 918 | return (struct h2s *)h2_idle_stream; |
| 919 | |
Willy Tarreau | 2373acc | 2017-10-12 17:35:14 +0200 | [diff] [blame] | 920 | node = eb32_lookup(&h2c->streams_by_id, id); |
| 921 | if (!node) |
Willy Tarreau | 2a85618 | 2017-05-16 15:20:39 +0200 | [diff] [blame] | 922 | return (struct h2s *)h2_closed_stream; |
Willy Tarreau | 2373acc | 2017-10-12 17:35:14 +0200 | [diff] [blame] | 923 | |
| 924 | return container_of(node, struct h2s, by_id); |
| 925 | } |
| 926 | |
Christopher Faulet | 73c1207 | 2019-04-08 11:23:22 +0200 | [diff] [blame] | 927 | /* release function. This one should be called to free all resources allocated |
| 928 | * to the mux. |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 929 | */ |
Christopher Faulet | 73c1207 | 2019-04-08 11:23:22 +0200 | [diff] [blame] | 930 | static void h2_release(struct h2c *h2c) |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 931 | { |
Christopher Faulet | 61840e7 | 2019-04-15 09:33:32 +0200 | [diff] [blame] | 932 | struct connection *conn = NULL;; |
Christopher Faulet | 39a96ee | 2019-04-08 10:52:21 +0200 | [diff] [blame] | 933 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 934 | TRACE_ENTER(H2_EV_H2C_END); |
| 935 | |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 936 | if (h2c) { |
Christopher Faulet | 61840e7 | 2019-04-15 09:33:32 +0200 | [diff] [blame] | 937 | /* The connection must be aattached to this mux to be released */ |
| 938 | if (h2c->conn && h2c->conn->ctx == h2c) |
| 939 | conn = h2c->conn; |
| 940 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 941 | TRACE_DEVEL("freeing h2c", H2_EV_H2C_END, conn); |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 942 | hpack_dht_free(h2c->ddht); |
Willy Tarreau | 1439812 | 2017-09-22 14:26:04 +0200 | [diff] [blame] | 943 | |
Willy Tarreau | 186e96e | 2019-05-28 17:21:18 +0200 | [diff] [blame] | 944 | if (LIST_ADDED(&h2c->buf_wait.list)) { |
| 945 | HA_SPIN_LOCK(BUF_WQ_LOCK, &buffer_wq_lock); |
| 946 | LIST_DEL(&h2c->buf_wait.list); |
| 947 | HA_SPIN_UNLOCK(BUF_WQ_LOCK, &buffer_wq_lock); |
| 948 | } |
Willy Tarreau | 1439812 | 2017-09-22 14:26:04 +0200 | [diff] [blame] | 949 | |
Willy Tarreau | 44e973f | 2018-03-01 17:49:30 +0100 | [diff] [blame] | 950 | h2_release_buf(h2c, &h2c->dbuf); |
Willy Tarreau | 2e3c000 | 2019-05-26 09:45:23 +0200 | [diff] [blame] | 951 | h2_release_mbuf(h2c); |
Willy Tarreau | 44e973f | 2018-03-01 17:49:30 +0100 | [diff] [blame] | 952 | |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 953 | if (h2c->task) { |
Willy Tarreau | 0975f11 | 2018-03-29 15:22:59 +0200 | [diff] [blame] | 954 | h2c->task->context = NULL; |
| 955 | task_wakeup(h2c->task, TASK_WOKEN_OTHER); |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 956 | h2c->task = NULL; |
| 957 | } |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 958 | if (h2c->wait_event.tasklet) |
| 959 | tasklet_free(h2c->wait_event.tasklet); |
Christopher Faulet | 21d849f | 2019-09-18 11:07:20 +0200 | [diff] [blame] | 960 | if (conn && h2c->wait_event.events != 0) |
Olivier Houchard | e179d0e | 2019-03-21 18:27:17 +0100 | [diff] [blame] | 961 | conn->xprt->unsubscribe(conn, conn->xprt_ctx, h2c->wait_event.events, |
Christopher Faulet | 21d849f | 2019-09-18 11:07:20 +0200 | [diff] [blame] | 962 | &h2c->wait_event); |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 963 | |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 964 | pool_free(pool_head_h2c, h2c); |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 965 | } |
| 966 | |
Christopher Faulet | 39a96ee | 2019-04-08 10:52:21 +0200 | [diff] [blame] | 967 | if (conn) { |
| 968 | conn->mux = NULL; |
| 969 | conn->ctx = NULL; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 970 | TRACE_DEVEL("freeing conn", H2_EV_H2C_END, conn); |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 971 | |
Christopher Faulet | 39a96ee | 2019-04-08 10:52:21 +0200 | [diff] [blame] | 972 | conn_stop_tracking(conn); |
| 973 | conn_full_close(conn); |
| 974 | if (conn->destroy_cb) |
| 975 | conn->destroy_cb(conn); |
| 976 | conn_free(conn); |
| 977 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 978 | |
| 979 | TRACE_LEAVE(H2_EV_H2C_END); |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 980 | } |
| 981 | |
| 982 | |
Willy Tarreau | 7168117 | 2017-10-23 14:39:06 +0200 | [diff] [blame] | 983 | /******************************************************/ |
| 984 | /* functions below are for the H2 protocol processing */ |
| 985 | /******************************************************/ |
| 986 | |
| 987 | /* returns the stream if of stream <h2s> or 0 if <h2s> is NULL */ |
Willy Tarreau | 1f09467 | 2017-11-20 21:27:45 +0100 | [diff] [blame] | 988 | static inline __maybe_unused int h2s_id(const struct h2s *h2s) |
Willy Tarreau | 7168117 | 2017-10-23 14:39:06 +0200 | [diff] [blame] | 989 | { |
| 990 | return h2s ? h2s->id : 0; |
| 991 | } |
| 992 | |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 993 | /* returns the sum of the stream's own window size and the mux's initial |
| 994 | * window, which together form the stream's effective window size. |
| 995 | */ |
| 996 | static inline int h2s_mws(const struct h2s *h2s) |
| 997 | { |
| 998 | return h2s->sws + h2s->h2c->miw; |
| 999 | } |
| 1000 | |
Willy Tarreau | 5b5e687 | 2017-09-25 16:17:25 +0200 | [diff] [blame] | 1001 | /* returns true of the mux is currently busy as seen from stream <h2s> */ |
Willy Tarreau | 1f09467 | 2017-11-20 21:27:45 +0100 | [diff] [blame] | 1002 | static inline __maybe_unused int h2c_mux_busy(const struct h2c *h2c, const struct h2s *h2s) |
Willy Tarreau | 5b5e687 | 2017-09-25 16:17:25 +0200 | [diff] [blame] | 1003 | { |
| 1004 | if (h2c->msi < 0) |
| 1005 | return 0; |
| 1006 | |
| 1007 | if (h2c->msi == h2s_id(h2s)) |
| 1008 | return 0; |
| 1009 | |
| 1010 | return 1; |
| 1011 | } |
| 1012 | |
Willy Tarreau | 741d6df | 2017-10-17 08:00:59 +0200 | [diff] [blame] | 1013 | /* marks an error on the connection */ |
Willy Tarreau | 1f09467 | 2017-11-20 21:27:45 +0100 | [diff] [blame] | 1014 | static inline __maybe_unused void h2c_error(struct h2c *h2c, enum h2_err err) |
Willy Tarreau | 741d6df | 2017-10-17 08:00:59 +0200 | [diff] [blame] | 1015 | { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1016 | TRACE_POINT(H2_EV_H2C_ERR, h2c->conn,,, (void *)(long)(err)); |
Willy Tarreau | 741d6df | 2017-10-17 08:00:59 +0200 | [diff] [blame] | 1017 | h2c->errcode = err; |
| 1018 | h2c->st0 = H2_CS_ERROR; |
| 1019 | } |
| 1020 | |
Willy Tarreau | 175cebb | 2019-01-24 10:02:24 +0100 | [diff] [blame] | 1021 | /* marks an error on the stream. It may also update an already closed stream |
| 1022 | * (e.g. to report an error after an RST was received). |
| 1023 | */ |
Willy Tarreau | 1f09467 | 2017-11-20 21:27:45 +0100 | [diff] [blame] | 1024 | static inline __maybe_unused void h2s_error(struct h2s *h2s, enum h2_err err) |
Willy Tarreau | 2e43f08 | 2017-10-17 08:03:59 +0200 | [diff] [blame] | 1025 | { |
Willy Tarreau | 175cebb | 2019-01-24 10:02:24 +0100 | [diff] [blame] | 1026 | if (h2s->id && h2s->st != H2_SS_ERROR) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1027 | TRACE_POINT(H2_EV_H2S_ERR, h2s->h2c->conn, h2s,, (void *)(long)(err)); |
Willy Tarreau | 2e43f08 | 2017-10-17 08:03:59 +0200 | [diff] [blame] | 1028 | h2s->errcode = err; |
Willy Tarreau | 175cebb | 2019-01-24 10:02:24 +0100 | [diff] [blame] | 1029 | if (h2s->st < H2_SS_ERROR) |
| 1030 | h2s->st = H2_SS_ERROR; |
Willy Tarreau | ec988c7 | 2018-12-19 18:00:29 +0100 | [diff] [blame] | 1031 | if (h2s->cs) |
| 1032 | cs_set_error(h2s->cs); |
Willy Tarreau | 2e43f08 | 2017-10-17 08:03:59 +0200 | [diff] [blame] | 1033 | } |
| 1034 | } |
| 1035 | |
Willy Tarreau | 7e09445 | 2018-12-19 18:08:52 +0100 | [diff] [blame] | 1036 | /* attempt to notify the data layer of recv availability */ |
| 1037 | static void __maybe_unused h2s_notify_recv(struct h2s *h2s) |
| 1038 | { |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 1039 | if (h2s->subs && h2s->subs->events & SUB_RETRY_RECV) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1040 | TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s); |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 1041 | tasklet_wakeup(h2s->subs->tasklet); |
| 1042 | h2s->subs->events &= ~SUB_RETRY_RECV; |
| 1043 | if (!h2s->subs->events) |
| 1044 | h2s->subs = NULL; |
Willy Tarreau | 7e09445 | 2018-12-19 18:08:52 +0100 | [diff] [blame] | 1045 | } |
| 1046 | } |
| 1047 | |
| 1048 | /* attempt to notify the data layer of send availability */ |
| 1049 | static void __maybe_unused h2s_notify_send(struct h2s *h2s) |
| 1050 | { |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 1051 | if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1052 | TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s); |
Willy Tarreau | d946416 | 2020-01-10 18:25:07 +0100 | [diff] [blame] | 1053 | h2s->flags |= H2_SF_NOTIFIED; |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 1054 | tasklet_wakeup(h2s->subs->tasklet); |
| 1055 | h2s->subs->events &= ~SUB_RETRY_SEND; |
| 1056 | if (!h2s->subs->events) |
| 1057 | h2s->subs = NULL; |
Willy Tarreau | 7e09445 | 2018-12-19 18:08:52 +0100 | [diff] [blame] | 1058 | } |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 1059 | else if (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) { |
| 1060 | TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s); |
| 1061 | tasklet_wakeup(h2s->shut_tl); |
| 1062 | } |
Willy Tarreau | 7e09445 | 2018-12-19 18:08:52 +0100 | [diff] [blame] | 1063 | } |
| 1064 | |
Willy Tarreau | 8b2757c | 2018-12-19 17:36:48 +0100 | [diff] [blame] | 1065 | /* alerts the data layer, trying to wake it up by all means, following |
| 1066 | * this sequence : |
| 1067 | * - if the h2s' data layer is subscribed to recv, then it's woken up for recv |
| 1068 | * - if its subscribed to send, then it's woken up for send |
| 1069 | * - if it was subscribed to neither, its ->wake() callback is called |
| 1070 | * It is safe to call this function with a closed stream which doesn't have a |
| 1071 | * conn_stream anymore. |
| 1072 | */ |
| 1073 | static void __maybe_unused h2s_alert(struct h2s *h2s) |
| 1074 | { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1075 | TRACE_ENTER(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s); |
| 1076 | |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 1077 | if (h2s->subs || |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 1078 | (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW))) { |
Willy Tarreau | 8b2757c | 2018-12-19 17:36:48 +0100 | [diff] [blame] | 1079 | h2s_notify_recv(h2s); |
| 1080 | h2s_notify_send(h2s); |
| 1081 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1082 | else if (h2s->cs && h2s->cs->data_cb->wake != NULL) { |
| 1083 | TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s); |
Willy Tarreau | 8b2757c | 2018-12-19 17:36:48 +0100 | [diff] [blame] | 1084 | h2s->cs->data_cb->wake(h2s->cs); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1085 | } |
| 1086 | |
| 1087 | TRACE_LEAVE(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s); |
Willy Tarreau | 8b2757c | 2018-12-19 17:36:48 +0100 | [diff] [blame] | 1088 | } |
| 1089 | |
Willy Tarreau | e482074 | 2017-07-27 13:37:23 +0200 | [diff] [blame] | 1090 | /* writes the 24-bit frame size <len> at address <frame> */ |
Willy Tarreau | 1f09467 | 2017-11-20 21:27:45 +0100 | [diff] [blame] | 1091 | static inline __maybe_unused void h2_set_frame_size(void *frame, uint32_t len) |
Willy Tarreau | e482074 | 2017-07-27 13:37:23 +0200 | [diff] [blame] | 1092 | { |
| 1093 | uint8_t *out = frame; |
| 1094 | |
| 1095 | *out = len >> 16; |
| 1096 | write_n16(out + 1, len); |
| 1097 | } |
| 1098 | |
Willy Tarreau | 54c1506 | 2017-10-10 17:10:03 +0200 | [diff] [blame] | 1099 | /* reads <bytes> bytes from buffer <b> starting at relative offset <o> from the |
| 1100 | * current pointer, dealing with wrapping, and stores the result in <dst>. It's |
| 1101 | * the caller's responsibility to verify that there are at least <bytes> bytes |
Willy Tarreau | 9c7f2d1 | 2018-06-15 11:51:32 +0200 | [diff] [blame] | 1102 | * available in the buffer's input prior to calling this function. The buffer |
| 1103 | * is assumed not to hold any output data. |
Willy Tarreau | 54c1506 | 2017-10-10 17:10:03 +0200 | [diff] [blame] | 1104 | */ |
Willy Tarreau | 1f09467 | 2017-11-20 21:27:45 +0100 | [diff] [blame] | 1105 | static inline __maybe_unused void h2_get_buf_bytes(void *dst, size_t bytes, |
Willy Tarreau | 54c1506 | 2017-10-10 17:10:03 +0200 | [diff] [blame] | 1106 | const struct buffer *b, int o) |
| 1107 | { |
Willy Tarreau | 591d445 | 2018-06-15 17:21:00 +0200 | [diff] [blame] | 1108 | readv_bytes(dst, bytes, b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b)); |
Willy Tarreau | 54c1506 | 2017-10-10 17:10:03 +0200 | [diff] [blame] | 1109 | } |
| 1110 | |
Willy Tarreau | 1f09467 | 2017-11-20 21:27:45 +0100 | [diff] [blame] | 1111 | static inline __maybe_unused uint16_t h2_get_n16(const struct buffer *b, int o) |
Willy Tarreau | 54c1506 | 2017-10-10 17:10:03 +0200 | [diff] [blame] | 1112 | { |
Willy Tarreau | 591d445 | 2018-06-15 17:21:00 +0200 | [diff] [blame] | 1113 | return readv_n16(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b)); |
Willy Tarreau | 54c1506 | 2017-10-10 17:10:03 +0200 | [diff] [blame] | 1114 | } |
| 1115 | |
Willy Tarreau | 1f09467 | 2017-11-20 21:27:45 +0100 | [diff] [blame] | 1116 | static inline __maybe_unused uint32_t h2_get_n32(const struct buffer *b, int o) |
Willy Tarreau | 54c1506 | 2017-10-10 17:10:03 +0200 | [diff] [blame] | 1117 | { |
Willy Tarreau | 591d445 | 2018-06-15 17:21:00 +0200 | [diff] [blame] | 1118 | return readv_n32(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b)); |
Willy Tarreau | 54c1506 | 2017-10-10 17:10:03 +0200 | [diff] [blame] | 1119 | } |
| 1120 | |
Willy Tarreau | 1f09467 | 2017-11-20 21:27:45 +0100 | [diff] [blame] | 1121 | static inline __maybe_unused uint64_t h2_get_n64(const struct buffer *b, int o) |
Willy Tarreau | 54c1506 | 2017-10-10 17:10:03 +0200 | [diff] [blame] | 1122 | { |
Willy Tarreau | 591d445 | 2018-06-15 17:21:00 +0200 | [diff] [blame] | 1123 | return readv_n64(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b)); |
Willy Tarreau | 54c1506 | 2017-10-10 17:10:03 +0200 | [diff] [blame] | 1124 | } |
| 1125 | |
| 1126 | |
Willy Tarreau | a4428bd | 2018-12-22 18:11:41 +0100 | [diff] [blame] | 1127 | /* Peeks an H2 frame header from offset <o> of buffer <b> into descriptor <h>. |
| 1128 | * The algorithm is not obvious. It turns out that H2 headers are neither |
| 1129 | * aligned nor do they use regular sizes. And to add to the trouble, the buffer |
| 1130 | * may wrap so each byte read must be checked. The header is formed like this : |
Willy Tarreau | 715d531 | 2017-07-11 15:20:24 +0200 | [diff] [blame] | 1131 | * |
| 1132 | * b0 b1 b2 b3 b4 b5..b8 |
| 1133 | * +----------+---------+--------+----+----+----------------------+ |
| 1134 | * |len[23:16]|len[15:8]|len[7:0]|type|flag|sid[31:0] (big endian)| |
| 1135 | * +----------+---------+--------+----+----+----------------------+ |
| 1136 | * |
| 1137 | * Here we read a big-endian 64 bit word from h[1]. This way in a single read |
| 1138 | * we get the sid properly aligned and ordered, and 16 bits of len properly |
| 1139 | * ordered as well. The type and flags can be extracted using bit shifts from |
| 1140 | * the word, and only one extra read is needed to fetch len[16:23]. |
Willy Tarreau | 9c7f2d1 | 2018-06-15 11:51:32 +0200 | [diff] [blame] | 1141 | * Returns zero if some bytes are missing, otherwise non-zero on success. The |
| 1142 | * buffer is assumed not to contain any output data. |
Willy Tarreau | 715d531 | 2017-07-11 15:20:24 +0200 | [diff] [blame] | 1143 | */ |
Willy Tarreau | a4428bd | 2018-12-22 18:11:41 +0100 | [diff] [blame] | 1144 | static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, int o, struct h2_fh *h) |
Willy Tarreau | 715d531 | 2017-07-11 15:20:24 +0200 | [diff] [blame] | 1145 | { |
| 1146 | uint64_t w; |
| 1147 | |
Willy Tarreau | a4428bd | 2018-12-22 18:11:41 +0100 | [diff] [blame] | 1148 | if (b_data(b) < o + 9) |
Willy Tarreau | 715d531 | 2017-07-11 15:20:24 +0200 | [diff] [blame] | 1149 | return 0; |
| 1150 | |
Willy Tarreau | a4428bd | 2018-12-22 18:11:41 +0100 | [diff] [blame] | 1151 | w = h2_get_n64(b, o + 1); |
| 1152 | h->len = *(uint8_t*)b_peek(b, o) << 16; |
Willy Tarreau | 715d531 | 2017-07-11 15:20:24 +0200 | [diff] [blame] | 1153 | h->sid = w & 0x7FFFFFFF; /* RFC7540#4.1: R bit must be ignored */ |
| 1154 | h->ff = w >> 32; |
| 1155 | h->ft = w >> 40; |
| 1156 | h->len += w >> 48; |
| 1157 | return 1; |
| 1158 | } |
| 1159 | |
| 1160 | /* skip the next 9 bytes corresponding to the frame header possibly parsed by |
| 1161 | * h2_peek_frame_hdr() above. |
| 1162 | */ |
Willy Tarreau | 1f09467 | 2017-11-20 21:27:45 +0100 | [diff] [blame] | 1163 | static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b) |
Willy Tarreau | 715d531 | 2017-07-11 15:20:24 +0200 | [diff] [blame] | 1164 | { |
Willy Tarreau | e5f12ce | 2018-06-15 10:28:05 +0200 | [diff] [blame] | 1165 | b_del(b, 9); |
Willy Tarreau | 715d531 | 2017-07-11 15:20:24 +0200 | [diff] [blame] | 1166 | } |
| 1167 | |
| 1168 | /* same as above, automatically advances the buffer on success */ |
Willy Tarreau | 1f09467 | 2017-11-20 21:27:45 +0100 | [diff] [blame] | 1169 | static inline __maybe_unused int h2_get_frame_hdr(struct buffer *b, struct h2_fh *h) |
Willy Tarreau | 715d531 | 2017-07-11 15:20:24 +0200 | [diff] [blame] | 1170 | { |
| 1171 | int ret; |
| 1172 | |
Willy Tarreau | a4428bd | 2018-12-22 18:11:41 +0100 | [diff] [blame] | 1173 | ret = h2_peek_frame_hdr(b, 0, h); |
Willy Tarreau | 715d531 | 2017-07-11 15:20:24 +0200 | [diff] [blame] | 1174 | if (ret > 0) |
| 1175 | h2_skip_frame_hdr(b); |
| 1176 | return ret; |
| 1177 | } |
| 1178 | |
Willy Tarreau | cb985a4 | 2019-10-07 16:56:34 +0200 | [diff] [blame] | 1179 | |
| 1180 | /* try to fragment the headers frame present at the beginning of buffer <b>, |
| 1181 | * enforcing a limit of <mfs> bytes per frame. Returns 0 on failure, 1 on |
| 1182 | * success. Typical causes of failure include a buffer not large enough to |
| 1183 | * add extra frame headers. The existing frame size is read in the current |
| 1184 | * frame. Its EH flag will be cleared if CONTINUATION frames need to be added, |
| 1185 | * and its length will be adjusted. The stream ID for continuation frames will |
| 1186 | * be copied from the initial frame's. |
| 1187 | */ |
| 1188 | static int h2_fragment_headers(struct buffer *b, uint32_t mfs) |
| 1189 | { |
| 1190 | size_t remain = b->data - 9; |
| 1191 | int extra_frames = (remain - 1) / mfs; |
| 1192 | size_t fsize; |
| 1193 | char *fptr; |
| 1194 | int frame; |
| 1195 | |
| 1196 | if (b->data <= mfs + 9) |
| 1197 | return 1; |
| 1198 | |
| 1199 | /* Too large a frame, we need to fragment it using CONTINUATION |
| 1200 | * frames. We start from the end and move tails as needed. |
| 1201 | */ |
| 1202 | if (b->data + extra_frames * 9 > b->size) |
| 1203 | return 0; |
| 1204 | |
| 1205 | for (frame = extra_frames; frame; frame--) { |
| 1206 | fsize = ((remain - 1) % mfs) + 1; |
| 1207 | remain -= fsize; |
| 1208 | |
| 1209 | /* move data */ |
| 1210 | fptr = b->area + 9 + remain + (frame - 1) * 9; |
| 1211 | memmove(fptr + 9, b->area + 9 + remain, fsize); |
| 1212 | b->data += 9; |
| 1213 | |
| 1214 | /* write new frame header */ |
| 1215 | h2_set_frame_size(fptr, fsize); |
| 1216 | fptr[3] = H2_FT_CONTINUATION; |
| 1217 | fptr[4] = (frame == extra_frames) ? H2_F_HEADERS_END_HEADERS : 0; |
| 1218 | write_n32(fptr + 5, read_n32(b->area + 5)); |
| 1219 | } |
| 1220 | |
| 1221 | b->area[4] &= ~H2_F_HEADERS_END_HEADERS; |
| 1222 | h2_set_frame_size(b->area, remain); |
| 1223 | return 1; |
| 1224 | } |
| 1225 | |
| 1226 | |
Willy Tarreau | 00dd078 | 2018-03-01 16:31:34 +0100 | [diff] [blame] | 1227 | /* marks stream <h2s> as CLOSED and decrement the number of active streams for |
| 1228 | * its connection if the stream was not yet closed. Please use this exclusively |
| 1229 | * before closing a stream to ensure stream count is well maintained. |
Willy Tarreau | 91bfdd7 | 2017-12-14 12:00:14 +0100 | [diff] [blame] | 1230 | */ |
Willy Tarreau | 00dd078 | 2018-03-01 16:31:34 +0100 | [diff] [blame] | 1231 | static inline void h2s_close(struct h2s *h2s) |
Willy Tarreau | 91bfdd7 | 2017-12-14 12:00:14 +0100 | [diff] [blame] | 1232 | { |
Willy Tarreau | d64a3eb | 2019-01-23 10:22:21 +0100 | [diff] [blame] | 1233 | if (h2s->st != H2_SS_CLOSED) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1234 | TRACE_ENTER(H2_EV_H2S_END, h2s->h2c->conn, h2s); |
Willy Tarreau | 91bfdd7 | 2017-12-14 12:00:14 +0100 | [diff] [blame] | 1235 | h2s->h2c->nb_streams--; |
Willy Tarreau | d64a3eb | 2019-01-23 10:22:21 +0100 | [diff] [blame] | 1236 | if (!h2s->id) |
| 1237 | h2s->h2c->nb_reserved--; |
Willy Tarreau | a27db38 | 2019-03-25 18:13:16 +0100 | [diff] [blame] | 1238 | if (h2s->cs) { |
Willy Tarreau | a27db38 | 2019-03-25 18:13:16 +0100 | [diff] [blame] | 1239 | if (!(h2s->cs->flags & CS_FL_EOS) && !b_data(&h2s->rxbuf)) |
| 1240 | h2s_notify_recv(h2s); |
| 1241 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1242 | TRACE_LEAVE(H2_EV_H2S_END, h2s->h2c->conn, h2s); |
Willy Tarreau | d64a3eb | 2019-01-23 10:22:21 +0100 | [diff] [blame] | 1243 | } |
Willy Tarreau | 91bfdd7 | 2017-12-14 12:00:14 +0100 | [diff] [blame] | 1244 | h2s->st = H2_SS_CLOSED; |
| 1245 | } |
| 1246 | |
Willy Tarreau | 71049cc | 2018-03-28 13:56:39 +0200 | [diff] [blame] | 1247 | /* detaches an H2 stream from its H2C and releases it to the H2S pool. */ |
Olivier Houchard | 5a3671d | 2019-10-11 16:33:49 +0200 | [diff] [blame] | 1248 | /* h2s_destroy should only ever be called by the thread that owns the stream, |
| 1249 | * that means that a tasklet should be used if we want to destroy the h2s |
| 1250 | * from another thread |
| 1251 | */ |
Willy Tarreau | 71049cc | 2018-03-28 13:56:39 +0200 | [diff] [blame] | 1252 | static void h2s_destroy(struct h2s *h2s) |
Willy Tarreau | 0a10de6 | 2018-03-01 16:27:53 +0100 | [diff] [blame] | 1253 | { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1254 | struct connection *conn = h2s->h2c->conn; |
| 1255 | |
| 1256 | TRACE_ENTER(H2_EV_H2S_END, conn, h2s); |
| 1257 | |
Willy Tarreau | 0a10de6 | 2018-03-01 16:27:53 +0100 | [diff] [blame] | 1258 | h2s_close(h2s); |
| 1259 | eb32_delete(&h2s->by_id); |
Olivier Houchard | 638b799 | 2018-08-16 15:41:52 +0200 | [diff] [blame] | 1260 | if (b_size(&h2s->rxbuf)) { |
| 1261 | b_free(&h2s->rxbuf); |
| 1262 | offer_buffers(NULL, tasks_run_queue); |
| 1263 | } |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 1264 | |
| 1265 | if (h2s->subs) |
| 1266 | h2s->subs->events = 0; |
| 1267 | |
Joseph Herlant | d77575d | 2018-11-25 10:54:45 -0800 | [diff] [blame] | 1268 | /* There's no need to explicitly call unsubscribe here, the only |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 1269 | * reference left would be in the h2c send_list/fctl_list, and if |
| 1270 | * we're in it, we're getting out anyway |
| 1271 | */ |
Olivier Houchard | d360ac6 | 2019-03-22 17:37:16 +0100 | [diff] [blame] | 1272 | LIST_DEL_INIT(&h2s->list); |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 1273 | |
Olivier Houchard | 5a3671d | 2019-10-11 16:33:49 +0200 | [diff] [blame] | 1274 | /* ditto, calling tasklet_free() here should be ok */ |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 1275 | tasklet_free(h2s->shut_tl); |
Willy Tarreau | 0a10de6 | 2018-03-01 16:27:53 +0100 | [diff] [blame] | 1276 | pool_free(pool_head_h2s, h2s); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1277 | |
| 1278 | TRACE_LEAVE(H2_EV_H2S_END, conn); |
Willy Tarreau | 0a10de6 | 2018-03-01 16:27:53 +0100 | [diff] [blame] | 1279 | } |
| 1280 | |
Willy Tarreau | a8e4954 | 2018-10-03 18:53:55 +0200 | [diff] [blame] | 1281 | /* allocates a new stream <id> for connection <h2c> and adds it into h2c's |
| 1282 | * stream tree. In case of error, nothing is added and NULL is returned. The |
| 1283 | * causes of errors can be any failed memory allocation. The caller is |
| 1284 | * responsible for checking if the connection may support an extra stream |
| 1285 | * prior to calling this function. |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1286 | */ |
Willy Tarreau | a8e4954 | 2018-10-03 18:53:55 +0200 | [diff] [blame] | 1287 | static struct h2s *h2s_new(struct h2c *h2c, int id) |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1288 | { |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1289 | struct h2s *h2s; |
| 1290 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1291 | TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn); |
| 1292 | |
Willy Tarreau | bafbe01 | 2017-11-24 17:34:44 +0100 | [diff] [blame] | 1293 | h2s = pool_alloc(pool_head_h2s); |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1294 | if (!h2s) |
| 1295 | goto out; |
| 1296 | |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 1297 | h2s->shut_tl = tasklet_new(); |
| 1298 | if (!h2s->shut_tl) { |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 1299 | pool_free(pool_head_h2s, h2s); |
| 1300 | goto out; |
| 1301 | } |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 1302 | h2s->subs = NULL; |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 1303 | h2s->shut_tl->process = h2_deferred_shut; |
| 1304 | h2s->shut_tl->context = h2s; |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 1305 | LIST_INIT(&h2s->list); |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1306 | h2s->h2c = h2c; |
Willy Tarreau | a8e4954 | 2018-10-03 18:53:55 +0200 | [diff] [blame] | 1307 | h2s->cs = NULL; |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 1308 | h2s->sws = 0; |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1309 | h2s->flags = H2_SF_NONE; |
| 1310 | h2s->errcode = H2_ERR_NO_ERROR; |
| 1311 | h2s->st = H2_SS_IDLE; |
Willy Tarreau | 9c5e22e | 2018-09-11 19:22:14 +0200 | [diff] [blame] | 1312 | h2s->status = 0; |
Willy Tarreau | 1915ca2 | 2019-01-24 11:49:37 +0100 | [diff] [blame] | 1313 | h2s->body_len = 0; |
Olivier Houchard | 638b799 | 2018-08-16 15:41:52 +0200 | [diff] [blame] | 1314 | h2s->rxbuf = BUF_NULL; |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 1315 | |
| 1316 | if (h2c->flags & H2_CF_IS_BACK) { |
| 1317 | h1m_init_req(&h2s->h1m); |
| 1318 | h2s->h1m.err_pos = -1; // don't care about errors on the request path |
| 1319 | h2s->h1m.flags |= H1_MF_TOLOWER; |
| 1320 | } else { |
| 1321 | h1m_init_res(&h2s->h1m); |
| 1322 | h2s->h1m.err_pos = -1; // don't care about errors on the response path |
| 1323 | h2s->h1m.flags |= H1_MF_TOLOWER; |
| 1324 | } |
| 1325 | |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1326 | h2s->by_id.key = h2s->id = id; |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 1327 | if (id > 0) |
| 1328 | h2c->max_id = id; |
Willy Tarreau | d64a3eb | 2019-01-23 10:22:21 +0100 | [diff] [blame] | 1329 | else |
| 1330 | h2c->nb_reserved++; |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1331 | |
| 1332 | eb32_insert(&h2c->streams_by_id, &h2s->by_id); |
Willy Tarreau | 4974561 | 2017-12-03 18:56:02 +0100 | [diff] [blame] | 1333 | h2c->nb_streams++; |
Willy Tarreau | e9634bd | 2019-01-23 10:25:10 +0100 | [diff] [blame] | 1334 | h2c->stream_cnt++; |
Willy Tarreau | a8e4954 | 2018-10-03 18:53:55 +0200 | [diff] [blame] | 1335 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1336 | TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s); |
Willy Tarreau | a8e4954 | 2018-10-03 18:53:55 +0200 | [diff] [blame] | 1337 | return h2s; |
Willy Tarreau | a8e4954 | 2018-10-03 18:53:55 +0200 | [diff] [blame] | 1338 | out: |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1339 | TRACE_DEVEL("leaving in error", H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn); |
Willy Tarreau | a8e4954 | 2018-10-03 18:53:55 +0200 | [diff] [blame] | 1340 | return NULL; |
| 1341 | } |
| 1342 | |
| 1343 | /* creates a new stream <id> on the h2c connection and returns it, or NULL in |
| 1344 | * case of memory allocation error. |
| 1345 | */ |
| 1346 | static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id) |
| 1347 | { |
| 1348 | struct session *sess = h2c->conn->owner; |
| 1349 | struct conn_stream *cs; |
| 1350 | struct h2s *h2s; |
| 1351 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1352 | TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn); |
| 1353 | |
Willy Tarreau | a8e4954 | 2018-10-03 18:53:55 +0200 | [diff] [blame] | 1354 | if (h2c->nb_streams >= h2_settings_max_concurrent_streams) |
| 1355 | goto out; |
| 1356 | |
| 1357 | h2s = h2s_new(h2c, id); |
| 1358 | if (!h2s) |
| 1359 | goto out; |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1360 | |
| 1361 | cs = cs_new(h2c->conn); |
| 1362 | if (!cs) |
| 1363 | goto out_close; |
| 1364 | |
Olivier Houchard | 746fb77 | 2018-12-15 19:42:00 +0100 | [diff] [blame] | 1365 | cs->flags |= CS_FL_NOT_FIRST; |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1366 | h2s->cs = cs; |
| 1367 | cs->ctx = h2s; |
Willy Tarreau | 7ac60e8 | 2018-07-19 09:04:05 +0200 | [diff] [blame] | 1368 | h2c->nb_cs++; |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1369 | |
| 1370 | if (stream_create_from_cs(cs) < 0) |
| 1371 | goto out_free_cs; |
| 1372 | |
Willy Tarreau | 590a051 | 2018-09-05 11:56:48 +0200 | [diff] [blame] | 1373 | /* We want the accept date presented to the next stream to be the one |
| 1374 | * we have now, the handshake time to be null (since the next stream |
| 1375 | * is not delayed by a handshake), and the idle time to count since |
| 1376 | * right now. |
| 1377 | */ |
| 1378 | sess->accept_date = date; |
| 1379 | sess->tv_accept = now; |
| 1380 | sess->t_handshake = 0; |
| 1381 | |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1382 | /* OK done, the stream lives its own life now */ |
Willy Tarreau | fa1d357 | 2019-01-31 10:31:51 +0100 | [diff] [blame] | 1383 | if (h2_frt_has_too_many_cs(h2c)) |
Willy Tarreau | f210191 | 2018-07-19 10:11:38 +0200 | [diff] [blame] | 1384 | h2c->flags |= H2_CF_DEM_TOOMANY; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1385 | TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn); |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1386 | return h2s; |
| 1387 | |
| 1388 | out_free_cs: |
Willy Tarreau | 7ac60e8 | 2018-07-19 09:04:05 +0200 | [diff] [blame] | 1389 | h2c->nb_cs--; |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1390 | cs_free(cs); |
Olivier Houchard | 58d87f3 | 2019-05-29 16:44:17 +0200 | [diff] [blame] | 1391 | h2s->cs = NULL; |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1392 | out_close: |
Willy Tarreau | 71049cc | 2018-03-28 13:56:39 +0200 | [diff] [blame] | 1393 | h2s_destroy(h2s); |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1394 | out: |
Willy Tarreau | 45efc07 | 2018-10-03 18:27:52 +0200 | [diff] [blame] | 1395 | sess_log(sess); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1396 | TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn); |
Willy Tarreau | 45efc07 | 2018-10-03 18:27:52 +0200 | [diff] [blame] | 1397 | return NULL; |
Willy Tarreau | 3ccf4b2 | 2017-10-13 19:07:26 +0200 | [diff] [blame] | 1398 | } |
| 1399 | |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 1400 | /* allocates a new stream associated to conn_stream <cs> on the h2c connection |
| 1401 | * and returns it, or NULL in case of memory allocation error or if the highest |
| 1402 | * possible stream ID was reached. |
| 1403 | */ |
Olivier Houchard | f502aca | 2018-12-14 19:42:40 +0100 | [diff] [blame] | 1404 | static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess) |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 1405 | { |
| 1406 | struct h2s *h2s = NULL; |
| 1407 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1408 | TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn); |
| 1409 | |
Willy Tarreau | 8694978 | 2019-01-31 10:42:05 +0100 | [diff] [blame] | 1410 | if (h2c->nb_streams >= h2c->streams_limit) |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 1411 | goto out; |
| 1412 | |
Willy Tarreau | a80dca8 | 2019-01-24 17:08:28 +0100 | [diff] [blame] | 1413 | if (h2_streams_left(h2c) < 1) |
| 1414 | goto out; |
| 1415 | |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 1416 | /* Defer choosing the ID until we send the first message to create the stream */ |
| 1417 | h2s = h2s_new(h2c, 0); |
| 1418 | if (!h2s) |
| 1419 | goto out; |
| 1420 | |
| 1421 | h2s->cs = cs; |
Olivier Houchard | f502aca | 2018-12-14 19:42:40 +0100 | [diff] [blame] | 1422 | h2s->sess = sess; |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 1423 | cs->ctx = h2s; |
| 1424 | h2c->nb_cs++; |
| 1425 | |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 1426 | out: |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1427 | if (likely(h2s)) |
| 1428 | TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s); |
| 1429 | else |
| 1430 | TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn, h2s); |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 1431 | return h2s; |
| 1432 | } |
| 1433 | |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1434 | /* try to send a settings frame on the connection. Returns > 0 on success, 0 if |
| 1435 | * it couldn't do anything. It may return an error in h2c. See RFC7540#11.3 for |
| 1436 | * the various settings codes. |
| 1437 | */ |
Willy Tarreau | 7f0cc49 | 2018-10-08 07:13:08 +0200 | [diff] [blame] | 1438 | static int h2c_send_settings(struct h2c *h2c) |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1439 | { |
| 1440 | struct buffer *res; |
| 1441 | char buf_data[100]; // enough for 15 settings |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 1442 | struct buffer buf; |
Willy Tarreau | a24b35c | 2019-02-21 13:24:36 +0100 | [diff] [blame] | 1443 | int mfs; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1444 | int ret = 0; |
| 1445 | |
| 1446 | TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn); |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1447 | |
| 1448 | if (h2c_mux_busy(h2c, NULL)) { |
| 1449 | h2c->flags |= H2_CF_DEM_MBUSY; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1450 | goto out; |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1451 | } |
| 1452 | |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1453 | chunk_init(&buf, buf_data, sizeof(buf_data)); |
| 1454 | chunk_memcpy(&buf, |
| 1455 | "\x00\x00\x00" /* length : 0 for now */ |
| 1456 | "\x04\x00" /* type : 4 (settings), flags : 0 */ |
| 1457 | "\x00\x00\x00\x00", /* stream ID : 0 */ |
| 1458 | 9); |
| 1459 | |
Willy Tarreau | 0bbad6b | 2019-02-26 16:01:52 +0100 | [diff] [blame] | 1460 | if (h2c->flags & H2_CF_IS_BACK) { |
| 1461 | /* send settings_enable_push=0 */ |
| 1462 | chunk_memcat(&buf, "\x00\x02\x00\x00\x00\x00", 6); |
| 1463 | } |
| 1464 | |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1465 | if (h2_settings_header_table_size != 4096) { |
| 1466 | char str[6] = "\x00\x01"; /* header_table_size */ |
| 1467 | |
| 1468 | write_n32(str + 2, h2_settings_header_table_size); |
| 1469 | chunk_memcat(&buf, str, 6); |
| 1470 | } |
| 1471 | |
| 1472 | if (h2_settings_initial_window_size != 65535) { |
| 1473 | char str[6] = "\x00\x04"; /* initial_window_size */ |
| 1474 | |
| 1475 | write_n32(str + 2, h2_settings_initial_window_size); |
| 1476 | chunk_memcat(&buf, str, 6); |
| 1477 | } |
| 1478 | |
| 1479 | if (h2_settings_max_concurrent_streams != 0) { |
| 1480 | char str[6] = "\x00\x03"; /* max_concurrent_streams */ |
| 1481 | |
| 1482 | /* Note: 0 means "unlimited" for haproxy's config but not for |
| 1483 | * the protocol, so never send this value! |
| 1484 | */ |
| 1485 | write_n32(str + 2, h2_settings_max_concurrent_streams); |
| 1486 | chunk_memcat(&buf, str, 6); |
| 1487 | } |
| 1488 | |
Willy Tarreau | a24b35c | 2019-02-21 13:24:36 +0100 | [diff] [blame] | 1489 | mfs = h2_settings_max_frame_size; |
| 1490 | if (mfs > global.tune.bufsize) |
| 1491 | mfs = global.tune.bufsize; |
| 1492 | |
| 1493 | if (!mfs) |
| 1494 | mfs = global.tune.bufsize; |
| 1495 | |
| 1496 | if (mfs != 16384) { |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1497 | char str[6] = "\x00\x05"; /* max_frame_size */ |
| 1498 | |
| 1499 | /* note: similarly we could also emit MAX_HEADER_LIST_SIZE to |
| 1500 | * match bufsize - rewrite size, but at the moment it seems |
| 1501 | * that clients don't take care of it. |
| 1502 | */ |
Willy Tarreau | a24b35c | 2019-02-21 13:24:36 +0100 | [diff] [blame] | 1503 | write_n32(str + 2, mfs); |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1504 | chunk_memcat(&buf, str, 6); |
| 1505 | } |
| 1506 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 1507 | h2_set_frame_size(buf.area, buf.data - 9); |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1508 | |
| 1509 | res = br_tail(h2c->mbuf); |
| 1510 | retry: |
| 1511 | if (!h2_get_buf(h2c, res)) { |
| 1512 | h2c->flags |= H2_CF_MUX_MALLOC; |
| 1513 | h2c->flags |= H2_CF_DEM_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1514 | goto out; |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1515 | } |
| 1516 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 1517 | ret = b_istput(res, ist2(buf.area, buf.data)); |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1518 | if (unlikely(ret <= 0)) { |
| 1519 | if (!ret) { |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1520 | if ((res = br_tail_add(h2c->mbuf)) != NULL) |
| 1521 | goto retry; |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1522 | h2c->flags |= H2_CF_MUX_MFULL; |
| 1523 | h2c->flags |= H2_CF_DEM_MROOM; |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1524 | } |
| 1525 | else { |
| 1526 | h2c_error(h2c, H2_ERR_INTERNAL_ERROR); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1527 | ret = 0; |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1528 | } |
| 1529 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1530 | out: |
| 1531 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn); |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1532 | return ret; |
| 1533 | } |
| 1534 | |
Willy Tarreau | 52eed75 | 2017-09-22 15:05:09 +0200 | [diff] [blame] | 1535 | /* Try to receive a connection preface, then upon success try to send our |
| 1536 | * preface which is a SETTINGS frame. Returns > 0 on success or zero on |
| 1537 | * missing data. It may return an error in h2c. |
| 1538 | */ |
| 1539 | static int h2c_frt_recv_preface(struct h2c *h2c) |
| 1540 | { |
| 1541 | int ret1; |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1542 | int ret2; |
Willy Tarreau | 52eed75 | 2017-09-22 15:05:09 +0200 | [diff] [blame] | 1543 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1544 | TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn); |
| 1545 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1546 | ret1 = b_isteq(&h2c->dbuf, 0, b_data(&h2c->dbuf), ist(H2_CONN_PREFACE)); |
Willy Tarreau | 52eed75 | 2017-09-22 15:05:09 +0200 | [diff] [blame] | 1547 | |
| 1548 | if (unlikely(ret1 <= 0)) { |
Willy Tarreau | 22de8d3 | 2018-09-05 19:55:58 +0200 | [diff] [blame] | 1549 | if (ret1 < 0) |
| 1550 | sess_log(h2c->conn->owner); |
| 1551 | |
Willy Tarreau | 52eed75 | 2017-09-22 15:05:09 +0200 | [diff] [blame] | 1552 | if (ret1 < 0 || conn_xprt_read0_pending(h2c->conn)) |
| 1553 | h2c_error(h2c, H2_ERR_PROTOCOL_ERROR); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1554 | ret2 = 0; |
| 1555 | goto out; |
Willy Tarreau | 52eed75 | 2017-09-22 15:05:09 +0200 | [diff] [blame] | 1556 | } |
| 1557 | |
Willy Tarreau | 7f0cc49 | 2018-10-08 07:13:08 +0200 | [diff] [blame] | 1558 | ret2 = h2c_send_settings(h2c); |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1559 | if (ret2 > 0) |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 1560 | b_del(&h2c->dbuf, ret1); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1561 | out: |
| 1562 | TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn); |
Willy Tarreau | be5b715 | 2017-09-25 16:25:39 +0200 | [diff] [blame] | 1563 | return ret2; |
Willy Tarreau | 52eed75 | 2017-09-22 15:05:09 +0200 | [diff] [blame] | 1564 | } |
| 1565 | |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 1566 | /* Try to send a connection preface, then upon success try to send our |
| 1567 | * preface which is a SETTINGS frame. Returns > 0 on success or zero on |
| 1568 | * missing data. It may return an error in h2c. |
| 1569 | */ |
| 1570 | static int h2c_bck_send_preface(struct h2c *h2c) |
| 1571 | { |
| 1572 | struct buffer *res; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1573 | int ret = 0; |
| 1574 | |
| 1575 | TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn); |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 1576 | |
| 1577 | if (h2c_mux_busy(h2c, NULL)) { |
| 1578 | h2c->flags |= H2_CF_DEM_MBUSY; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1579 | goto out; |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 1580 | } |
| 1581 | |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 1582 | res = br_tail(h2c->mbuf); |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1583 | retry: |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 1584 | if (!h2_get_buf(h2c, res)) { |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 1585 | h2c->flags |= H2_CF_MUX_MALLOC; |
| 1586 | h2c->flags |= H2_CF_DEM_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1587 | goto out; |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 1588 | } |
| 1589 | |
| 1590 | if (!b_data(res)) { |
| 1591 | /* preface not yet sent */ |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1592 | ret = b_istput(res, ist(H2_CONN_PREFACE)); |
| 1593 | if (unlikely(ret <= 0)) { |
| 1594 | if (!ret) { |
| 1595 | if ((res = br_tail_add(h2c->mbuf)) != NULL) |
| 1596 | goto retry; |
| 1597 | h2c->flags |= H2_CF_MUX_MFULL; |
| 1598 | h2c->flags |= H2_CF_DEM_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1599 | goto out; |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1600 | } |
| 1601 | else { |
| 1602 | h2c_error(h2c, H2_ERR_INTERNAL_ERROR); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1603 | ret = 0; |
| 1604 | goto out; |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1605 | } |
| 1606 | } |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 1607 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1608 | ret = h2c_send_settings(h2c); |
| 1609 | out: |
| 1610 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn); |
| 1611 | return ret; |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 1612 | } |
| 1613 | |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 1614 | /* try to send a GOAWAY frame on the connection to report an error or a graceful |
| 1615 | * shutdown, with h2c->errcode as the error code. Returns > 0 on success or zero |
| 1616 | * if nothing was done. It uses h2c->last_sid as the advertised ID, or copies it |
| 1617 | * from h2c->max_id if it's not set yet (<0). In case of lack of room to write |
| 1618 | * the message, it subscribes the requester (either <h2s> or <h2c>) to future |
| 1619 | * notifications. It sets H2_CF_GOAWAY_SENT on success, and H2_CF_GOAWAY_FAILED |
| 1620 | * on unrecoverable failure. It will not attempt to send one again in this last |
| 1621 | * case so that it is safe to use h2c_error() to report such errors. |
| 1622 | */ |
| 1623 | static int h2c_send_goaway_error(struct h2c *h2c, struct h2s *h2s) |
| 1624 | { |
| 1625 | struct buffer *res; |
| 1626 | char str[17]; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1627 | int ret = 0; |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 1628 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1629 | TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn); |
| 1630 | |
| 1631 | if (h2c->flags & H2_CF_GOAWAY_FAILED) { |
| 1632 | ret = 1; // claim that it worked |
| 1633 | goto out; |
| 1634 | } |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 1635 | |
| 1636 | if (h2c_mux_busy(h2c, h2s)) { |
| 1637 | if (h2s) |
| 1638 | h2s->flags |= H2_SF_BLK_MBUSY; |
| 1639 | else |
| 1640 | h2c->flags |= H2_CF_DEM_MBUSY; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1641 | goto out; |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 1642 | } |
| 1643 | |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1644 | /* len: 8, type: 7, flags: none, sid: 0 */ |
| 1645 | memcpy(str, "\x00\x00\x08\x07\x00\x00\x00\x00\x00", 9); |
| 1646 | |
| 1647 | if (h2c->last_sid < 0) |
| 1648 | h2c->last_sid = h2c->max_id; |
| 1649 | |
| 1650 | write_n32(str + 9, h2c->last_sid); |
| 1651 | write_n32(str + 13, h2c->errcode); |
| 1652 | |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 1653 | res = br_tail(h2c->mbuf); |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1654 | retry: |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 1655 | if (!h2_get_buf(h2c, res)) { |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 1656 | h2c->flags |= H2_CF_MUX_MALLOC; |
| 1657 | if (h2s) |
| 1658 | h2s->flags |= H2_SF_BLK_MROOM; |
| 1659 | else |
| 1660 | h2c->flags |= H2_CF_DEM_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1661 | goto out; |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 1662 | } |
| 1663 | |
Willy Tarreau | ea1b06d | 2018-07-12 09:02:47 +0200 | [diff] [blame] | 1664 | ret = b_istput(res, ist2(str, 17)); |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 1665 | if (unlikely(ret <= 0)) { |
| 1666 | if (!ret) { |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1667 | if ((res = br_tail_add(h2c->mbuf)) != NULL) |
| 1668 | goto retry; |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 1669 | h2c->flags |= H2_CF_MUX_MFULL; |
| 1670 | if (h2s) |
| 1671 | h2s->flags |= H2_SF_BLK_MROOM; |
| 1672 | else |
| 1673 | h2c->flags |= H2_CF_DEM_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1674 | goto out; |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 1675 | } |
| 1676 | else { |
| 1677 | /* we cannot report this error using GOAWAY, so we mark |
| 1678 | * it and claim a success. |
| 1679 | */ |
| 1680 | h2c_error(h2c, H2_ERR_INTERNAL_ERROR); |
| 1681 | h2c->flags |= H2_CF_GOAWAY_FAILED; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1682 | ret = 1; |
| 1683 | goto out; |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 1684 | } |
| 1685 | } |
| 1686 | h2c->flags |= H2_CF_GOAWAY_SENT; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1687 | out: |
| 1688 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn); |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 1689 | return ret; |
| 1690 | } |
| 1691 | |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1692 | /* Try to send an RST_STREAM frame on the connection for the indicated stream |
| 1693 | * during mux operations. This stream must be valid and cannot be closed |
| 1694 | * already. h2s->id will be used for the stream ID and h2s->errcode will be |
| 1695 | * used for the error code. h2s->st will be update to H2_SS_CLOSED if it was |
| 1696 | * not yet. |
| 1697 | * |
| 1698 | * Returns > 0 on success or zero if nothing was done. In case of lack of room |
| 1699 | * to write the message, it subscribes the stream to future notifications. |
| 1700 | */ |
| 1701 | static int h2s_send_rst_stream(struct h2c *h2c, struct h2s *h2s) |
| 1702 | { |
| 1703 | struct buffer *res; |
| 1704 | char str[13]; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1705 | int ret = 0; |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1706 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1707 | TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s); |
| 1708 | |
| 1709 | if (!h2s || h2s->st == H2_SS_CLOSED) { |
| 1710 | ret = 1; |
| 1711 | goto out; |
| 1712 | } |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1713 | |
Willy Tarreau | 8adae7c | 2018-03-22 17:37:05 +0100 | [diff] [blame] | 1714 | /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a |
| 1715 | * RST_STREAM in response to a RST_STREAM frame. |
| 1716 | */ |
Willy Tarreau | 231f616 | 2019-08-06 10:01:40 +0200 | [diff] [blame] | 1717 | if (h2c->dsi == h2s->id && h2c->dft == H2_FT_RST_STREAM) { |
Willy Tarreau | 8adae7c | 2018-03-22 17:37:05 +0100 | [diff] [blame] | 1718 | ret = 1; |
| 1719 | goto ignore; |
| 1720 | } |
| 1721 | |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1722 | if (h2c_mux_busy(h2c, h2s)) { |
| 1723 | h2s->flags |= H2_SF_BLK_MBUSY; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1724 | goto out; |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1725 | } |
| 1726 | |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1727 | /* len: 4, type: 3, flags: none */ |
| 1728 | memcpy(str, "\x00\x00\x04\x03\x00", 5); |
| 1729 | write_n32(str + 5, h2s->id); |
| 1730 | write_n32(str + 9, h2s->errcode); |
| 1731 | |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 1732 | res = br_tail(h2c->mbuf); |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1733 | retry: |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 1734 | if (!h2_get_buf(h2c, res)) { |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1735 | h2c->flags |= H2_CF_MUX_MALLOC; |
| 1736 | h2s->flags |= H2_SF_BLK_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1737 | goto out; |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1738 | } |
| 1739 | |
Willy Tarreau | ea1b06d | 2018-07-12 09:02:47 +0200 | [diff] [blame] | 1740 | ret = b_istput(res, ist2(str, 13)); |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1741 | if (unlikely(ret <= 0)) { |
| 1742 | if (!ret) { |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1743 | if ((res = br_tail_add(h2c->mbuf)) != NULL) |
| 1744 | goto retry; |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1745 | h2c->flags |= H2_CF_MUX_MFULL; |
| 1746 | h2s->flags |= H2_SF_BLK_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1747 | goto out; |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1748 | } |
| 1749 | else { |
| 1750 | h2c_error(h2c, H2_ERR_INTERNAL_ERROR); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1751 | ret = 0; |
| 1752 | goto out; |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1753 | } |
| 1754 | } |
| 1755 | |
Willy Tarreau | 8adae7c | 2018-03-22 17:37:05 +0100 | [diff] [blame] | 1756 | ignore: |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1757 | h2s->flags |= H2_SF_RST_SENT; |
Willy Tarreau | 00dd078 | 2018-03-01 16:31:34 +0100 | [diff] [blame] | 1758 | h2s_close(h2s); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1759 | out: |
| 1760 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s); |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1761 | return ret; |
| 1762 | } |
| 1763 | |
| 1764 | /* Try to send an RST_STREAM frame on the connection for the stream being |
| 1765 | * demuxed using h2c->dsi for the stream ID. It will use h2s->errcode as the |
Willy Tarreau | e6888ff | 2018-12-23 18:26:26 +0100 | [diff] [blame] | 1766 | * error code, even if the stream is one of the dummy ones, and will update |
| 1767 | * h2s->st to H2_SS_CLOSED if it was not yet. |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1768 | * |
| 1769 | * Returns > 0 on success or zero if nothing was done. In case of lack of room |
| 1770 | * to write the message, it blocks the demuxer and subscribes it to future |
Joseph Herlant | d77575d | 2018-11-25 10:54:45 -0800 | [diff] [blame] | 1771 | * notifications. It's worth mentioning that an RST may even be sent for a |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1772 | * closed stream. |
Willy Tarreau | 27a84c9 | 2017-10-17 08:10:17 +0200 | [diff] [blame] | 1773 | */ |
| 1774 | static int h2c_send_rst_stream(struct h2c *h2c, struct h2s *h2s) |
| 1775 | { |
| 1776 | struct buffer *res; |
| 1777 | char str[13]; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1778 | int ret = 0; |
| 1779 | |
| 1780 | TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s); |
Willy Tarreau | 27a84c9 | 2017-10-17 08:10:17 +0200 | [diff] [blame] | 1781 | |
Willy Tarreau | 8adae7c | 2018-03-22 17:37:05 +0100 | [diff] [blame] | 1782 | /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a |
| 1783 | * RST_STREAM in response to a RST_STREAM frame. |
| 1784 | */ |
| 1785 | if (h2c->dft == H2_FT_RST_STREAM) { |
| 1786 | ret = 1; |
| 1787 | goto ignore; |
| 1788 | } |
| 1789 | |
Willy Tarreau | 27a84c9 | 2017-10-17 08:10:17 +0200 | [diff] [blame] | 1790 | if (h2c_mux_busy(h2c, h2s)) { |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1791 | h2c->flags |= H2_CF_DEM_MBUSY; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1792 | goto out; |
Willy Tarreau | 27a84c9 | 2017-10-17 08:10:17 +0200 | [diff] [blame] | 1793 | } |
| 1794 | |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1795 | /* len: 4, type: 3, flags: none */ |
| 1796 | memcpy(str, "\x00\x00\x04\x03\x00", 5); |
| 1797 | |
| 1798 | write_n32(str + 5, h2c->dsi); |
| 1799 | write_n32(str + 9, h2s->errcode); |
| 1800 | |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 1801 | res = br_tail(h2c->mbuf); |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1802 | retry: |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 1803 | if (!h2_get_buf(h2c, res)) { |
Willy Tarreau | 27a84c9 | 2017-10-17 08:10:17 +0200 | [diff] [blame] | 1804 | h2c->flags |= H2_CF_MUX_MALLOC; |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1805 | h2c->flags |= H2_CF_DEM_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1806 | goto out; |
Willy Tarreau | 27a84c9 | 2017-10-17 08:10:17 +0200 | [diff] [blame] | 1807 | } |
| 1808 | |
Willy Tarreau | ea1b06d | 2018-07-12 09:02:47 +0200 | [diff] [blame] | 1809 | ret = b_istput(res, ist2(str, 13)); |
Willy Tarreau | 27a84c9 | 2017-10-17 08:10:17 +0200 | [diff] [blame] | 1810 | if (unlikely(ret <= 0)) { |
| 1811 | if (!ret) { |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1812 | if ((res = br_tail_add(h2c->mbuf)) != NULL) |
| 1813 | goto retry; |
Willy Tarreau | 27a84c9 | 2017-10-17 08:10:17 +0200 | [diff] [blame] | 1814 | h2c->flags |= H2_CF_MUX_MFULL; |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1815 | h2c->flags |= H2_CF_DEM_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1816 | goto out; |
Willy Tarreau | 27a84c9 | 2017-10-17 08:10:17 +0200 | [diff] [blame] | 1817 | } |
| 1818 | else { |
| 1819 | h2c_error(h2c, H2_ERR_INTERNAL_ERROR); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1820 | ret = 0; |
| 1821 | goto out; |
Willy Tarreau | 27a84c9 | 2017-10-17 08:10:17 +0200 | [diff] [blame] | 1822 | } |
| 1823 | } |
| 1824 | |
Willy Tarreau | 8adae7c | 2018-03-22 17:37:05 +0100 | [diff] [blame] | 1825 | ignore: |
Willy Tarreau | ab0e1da | 2018-10-05 10:16:37 +0200 | [diff] [blame] | 1826 | if (h2s->id) { |
Willy Tarreau | 27a84c9 | 2017-10-17 08:10:17 +0200 | [diff] [blame] | 1827 | h2s->flags |= H2_SF_RST_SENT; |
Willy Tarreau | 00dd078 | 2018-03-01 16:31:34 +0100 | [diff] [blame] | 1828 | h2s_close(h2s); |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 1829 | } |
| 1830 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1831 | out: |
| 1832 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s); |
Willy Tarreau | 27a84c9 | 2017-10-17 08:10:17 +0200 | [diff] [blame] | 1833 | return ret; |
| 1834 | } |
| 1835 | |
Willy Tarreau | c7576ea | 2017-10-29 22:00:09 +0100 | [diff] [blame] | 1836 | /* try to send an empty DATA frame with the ES flag set to notify about the |
| 1837 | * end of stream and match a shutdown(write). If an ES was already sent as |
| 1838 | * indicated by HLOC/ERROR/RESET/CLOSED states, nothing is done. Returns > 0 |
| 1839 | * on success or zero if nothing was done. In case of lack of room to write the |
| 1840 | * message, it subscribes the requesting stream to future notifications. |
| 1841 | */ |
| 1842 | static int h2_send_empty_data_es(struct h2s *h2s) |
| 1843 | { |
| 1844 | struct h2c *h2c = h2s->h2c; |
| 1845 | struct buffer *res; |
| 1846 | char str[9]; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1847 | int ret = 0; |
Willy Tarreau | c7576ea | 2017-10-29 22:00:09 +0100 | [diff] [blame] | 1848 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1849 | TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s); |
| 1850 | |
| 1851 | if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED) { |
| 1852 | ret = 1; |
| 1853 | goto out; |
| 1854 | } |
Willy Tarreau | c7576ea | 2017-10-29 22:00:09 +0100 | [diff] [blame] | 1855 | |
| 1856 | if (h2c_mux_busy(h2c, h2s)) { |
| 1857 | h2s->flags |= H2_SF_BLK_MBUSY; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1858 | goto out; |
Willy Tarreau | c7576ea | 2017-10-29 22:00:09 +0100 | [diff] [blame] | 1859 | } |
| 1860 | |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1861 | /* len: 0x000000, type: 0(DATA), flags: ES=1 */ |
| 1862 | memcpy(str, "\x00\x00\x00\x00\x01", 5); |
| 1863 | write_n32(str + 5, h2s->id); |
| 1864 | |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 1865 | res = br_tail(h2c->mbuf); |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1866 | retry: |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 1867 | if (!h2_get_buf(h2c, res)) { |
Willy Tarreau | c7576ea | 2017-10-29 22:00:09 +0100 | [diff] [blame] | 1868 | h2c->flags |= H2_CF_MUX_MALLOC; |
| 1869 | h2s->flags |= H2_SF_BLK_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1870 | goto out; |
Willy Tarreau | c7576ea | 2017-10-29 22:00:09 +0100 | [diff] [blame] | 1871 | } |
| 1872 | |
Willy Tarreau | ea1b06d | 2018-07-12 09:02:47 +0200 | [diff] [blame] | 1873 | ret = b_istput(res, ist2(str, 9)); |
Willy Tarreau | 6d8b682 | 2017-11-07 14:39:09 +0100 | [diff] [blame] | 1874 | if (likely(ret > 0)) { |
| 1875 | h2s->flags |= H2_SF_ES_SENT; |
| 1876 | } |
| 1877 | else if (!ret) { |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 1878 | if ((res = br_tail_add(h2c->mbuf)) != NULL) |
| 1879 | goto retry; |
Willy Tarreau | 6d8b682 | 2017-11-07 14:39:09 +0100 | [diff] [blame] | 1880 | h2c->flags |= H2_CF_MUX_MFULL; |
| 1881 | h2s->flags |= H2_SF_BLK_MROOM; |
Willy Tarreau | 6d8b682 | 2017-11-07 14:39:09 +0100 | [diff] [blame] | 1882 | } |
| 1883 | else { |
| 1884 | h2c_error(h2c, H2_ERR_INTERNAL_ERROR); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1885 | ret = 0; |
Willy Tarreau | c7576ea | 2017-10-29 22:00:09 +0100 | [diff] [blame] | 1886 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1887 | out: |
| 1888 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s); |
Willy Tarreau | c7576ea | 2017-10-29 22:00:09 +0100 | [diff] [blame] | 1889 | return ret; |
| 1890 | } |
| 1891 | |
Willy Tarreau | 13b6c2e | 2019-05-07 17:26:05 +0200 | [diff] [blame] | 1892 | /* wake a specific stream and assign its conn_stream som CS_FL_* flags among |
Willy Tarreau | 99ad1b3 | 2019-05-14 11:46:28 +0200 | [diff] [blame] | 1893 | * CS_FL_ERR_PENDING and CS_FL_ERROR if needed. The stream's state |
Willy Tarreau | 13b6c2e | 2019-05-07 17:26:05 +0200 | [diff] [blame] | 1894 | * is automatically updated accordingly. If the stream is orphaned, it is |
| 1895 | * destroyed. |
Christopher Faulet | f02ca00 | 2019-03-07 16:21:34 +0100 | [diff] [blame] | 1896 | */ |
Willy Tarreau | 13b6c2e | 2019-05-07 17:26:05 +0200 | [diff] [blame] | 1897 | static void h2s_wake_one_stream(struct h2s *h2s) |
Christopher Faulet | f02ca00 | 2019-03-07 16:21:34 +0100 | [diff] [blame] | 1898 | { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1899 | struct h2c *h2c = h2s->h2c; |
| 1900 | |
| 1901 | TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn, h2s); |
| 1902 | |
Christopher Faulet | f02ca00 | 2019-03-07 16:21:34 +0100 | [diff] [blame] | 1903 | if (!h2s->cs) { |
| 1904 | /* this stream was already orphaned */ |
| 1905 | h2s_destroy(h2s); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1906 | TRACE_DEVEL("leaving with no h2s", H2_EV_H2S_WAKE, h2c->conn); |
Christopher Faulet | f02ca00 | 2019-03-07 16:21:34 +0100 | [diff] [blame] | 1907 | return; |
| 1908 | } |
| 1909 | |
Willy Tarreau | aebbe5e | 2019-05-07 17:48:59 +0200 | [diff] [blame] | 1910 | if (conn_xprt_read0_pending(h2s->h2c->conn)) { |
Willy Tarreau | aebbe5e | 2019-05-07 17:48:59 +0200 | [diff] [blame] | 1911 | if (h2s->st == H2_SS_OPEN) |
| 1912 | h2s->st = H2_SS_HREM; |
| 1913 | else if (h2s->st == H2_SS_HLOC) |
| 1914 | h2s_close(h2s); |
| 1915 | } |
Willy Tarreau | 13b6c2e | 2019-05-07 17:26:05 +0200 | [diff] [blame] | 1916 | |
Willy Tarreau | aebbe5e | 2019-05-07 17:48:59 +0200 | [diff] [blame] | 1917 | if ((h2s->h2c->st0 >= H2_CS_ERROR || h2s->h2c->conn->flags & CO_FL_ERROR) || |
| 1918 | (h2s->h2c->last_sid > 0 && (!h2s->id || h2s->id > h2s->h2c->last_sid))) { |
| 1919 | h2s->cs->flags |= CS_FL_ERR_PENDING; |
| 1920 | if (h2s->cs->flags & CS_FL_EOS) |
| 1921 | h2s->cs->flags |= CS_FL_ERROR; |
Willy Tarreau | 2348291 | 2019-05-07 15:23:14 +0200 | [diff] [blame] | 1922 | |
Willy Tarreau | aebbe5e | 2019-05-07 17:48:59 +0200 | [diff] [blame] | 1923 | if (h2s->st < H2_SS_ERROR) |
| 1924 | h2s->st = H2_SS_ERROR; |
| 1925 | } |
Christopher Faulet | f02ca00 | 2019-03-07 16:21:34 +0100 | [diff] [blame] | 1926 | |
| 1927 | h2s_alert(h2s); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1928 | TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn); |
Christopher Faulet | f02ca00 | 2019-03-07 16:21:34 +0100 | [diff] [blame] | 1929 | } |
| 1930 | |
| 1931 | /* wake the streams attached to the connection, whose id is greater than <last> |
| 1932 | * or unassigned. |
Willy Tarreau | 23b92aa | 2017-10-30 00:26:54 +0100 | [diff] [blame] | 1933 | */ |
Willy Tarreau | 2348291 | 2019-05-07 15:23:14 +0200 | [diff] [blame] | 1934 | static void h2_wake_some_streams(struct h2c *h2c, int last) |
Willy Tarreau | 23b92aa | 2017-10-30 00:26:54 +0100 | [diff] [blame] | 1935 | { |
| 1936 | struct eb32_node *node; |
| 1937 | struct h2s *h2s; |
Willy Tarreau | 23b92aa | 2017-10-30 00:26:54 +0100 | [diff] [blame] | 1938 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1939 | TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn); |
| 1940 | |
Christopher Faulet | f02ca00 | 2019-03-07 16:21:34 +0100 | [diff] [blame] | 1941 | /* Wake all streams with ID > last */ |
Willy Tarreau | 23b92aa | 2017-10-30 00:26:54 +0100 | [diff] [blame] | 1942 | node = eb32_lookup_ge(&h2c->streams_by_id, last + 1); |
| 1943 | while (node) { |
| 1944 | h2s = container_of(node, struct h2s, by_id); |
Willy Tarreau | 23b92aa | 2017-10-30 00:26:54 +0100 | [diff] [blame] | 1945 | node = eb32_next(node); |
Willy Tarreau | 13b6c2e | 2019-05-07 17:26:05 +0200 | [diff] [blame] | 1946 | h2s_wake_one_stream(h2s); |
Christopher Faulet | f02ca00 | 2019-03-07 16:21:34 +0100 | [diff] [blame] | 1947 | } |
Willy Tarreau | 22cf59b | 2017-11-10 11:42:33 +0100 | [diff] [blame] | 1948 | |
Christopher Faulet | f02ca00 | 2019-03-07 16:21:34 +0100 | [diff] [blame] | 1949 | /* Wake all streams with unassigned ID (ID == 0) */ |
| 1950 | node = eb32_lookup(&h2c->streams_by_id, 0); |
| 1951 | while (node) { |
| 1952 | h2s = container_of(node, struct h2s, by_id); |
| 1953 | if (h2s->id > 0) |
| 1954 | break; |
| 1955 | node = eb32_next(node); |
Willy Tarreau | 13b6c2e | 2019-05-07 17:26:05 +0200 | [diff] [blame] | 1956 | h2s_wake_one_stream(h2s); |
Willy Tarreau | 23b92aa | 2017-10-30 00:26:54 +0100 | [diff] [blame] | 1957 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1958 | |
| 1959 | TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn); |
Willy Tarreau | 23b92aa | 2017-10-30 00:26:54 +0100 | [diff] [blame] | 1960 | } |
| 1961 | |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 1962 | /* Wake up all blocked streams whose window size has become positive after the |
| 1963 | * mux's initial window was adjusted. This should be done after having processed |
| 1964 | * SETTINGS frames which have updated the mux's initial window size. |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 1965 | */ |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 1966 | static void h2c_unblock_sfctl(struct h2c *h2c) |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 1967 | { |
| 1968 | struct h2s *h2s; |
| 1969 | struct eb32_node *node; |
| 1970 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1971 | TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn); |
| 1972 | |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 1973 | node = eb32_first(&h2c->streams_by_id); |
| 1974 | while (node) { |
| 1975 | h2s = container_of(node, struct h2s, by_id); |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 1976 | if (h2s->flags & H2_SF_BLK_SFCTL && h2s_mws(h2s) > 0) { |
Willy Tarreau | b1c9edc | 2019-01-30 16:11:20 +0100 | [diff] [blame] | 1977 | h2s->flags &= ~H2_SF_BLK_SFCTL; |
Willy Tarreau | 9edf6db | 2019-10-02 10:49:59 +0200 | [diff] [blame] | 1978 | LIST_DEL_INIT(&h2s->list); |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 1979 | if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) || |
| 1980 | h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) |
Willy Tarreau | b1c9edc | 2019-01-30 16:11:20 +0100 | [diff] [blame] | 1981 | LIST_ADDQ(&h2c->send_list, &h2s->list); |
Willy Tarreau | b1c9edc | 2019-01-30 16:11:20 +0100 | [diff] [blame] | 1982 | } |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 1983 | node = eb32_next(node); |
| 1984 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1985 | |
| 1986 | TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn); |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 1987 | } |
| 1988 | |
| 1989 | /* processes a SETTINGS frame whose payload is <payload> for <plen> bytes, and |
| 1990 | * ACKs it if needed. Returns > 0 on success or zero on missing data. It may |
Willy Tarreau | b860c73 | 2019-01-30 15:39:55 +0100 | [diff] [blame] | 1991 | * return an error in h2c. The caller must have already verified frame length |
| 1992 | * and stream ID validity. Described in RFC7540#6.5. |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 1993 | */ |
| 1994 | static int h2c_handle_settings(struct h2c *h2c) |
| 1995 | { |
| 1996 | unsigned int offset; |
| 1997 | int error; |
| 1998 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 1999 | TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn); |
| 2000 | |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2001 | if (h2c->dff & H2_F_SETTINGS_ACK) { |
| 2002 | if (h2c->dfl) { |
| 2003 | error = H2_ERR_FRAME_SIZE_ERROR; |
| 2004 | goto fail; |
| 2005 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2006 | goto done; |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2007 | } |
| 2008 | |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2009 | /* process full frame only */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2010 | if (b_data(&h2c->dbuf) < h2c->dfl) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2011 | goto out0; |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2012 | |
| 2013 | /* parse the frame */ |
| 2014 | for (offset = 0; offset < h2c->dfl; offset += 6) { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2015 | uint16_t type = h2_get_n16(&h2c->dbuf, offset); |
| 2016 | int32_t arg = h2_get_n32(&h2c->dbuf, offset + 2); |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2017 | |
| 2018 | switch (type) { |
| 2019 | case H2_SETTINGS_INITIAL_WINDOW_SIZE: |
| 2020 | /* we need to update all existing streams with the |
| 2021 | * difference from the previous iws. |
| 2022 | */ |
| 2023 | if (arg < 0) { // RFC7540#6.5.2 |
| 2024 | error = H2_ERR_FLOW_CONTROL_ERROR; |
| 2025 | goto fail; |
| 2026 | } |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2027 | h2c->miw = arg; |
| 2028 | break; |
| 2029 | case H2_SETTINGS_MAX_FRAME_SIZE: |
| 2030 | if (arg < 16384 || arg > 16777215) { // RFC7540#6.5.2 |
| 2031 | error = H2_ERR_PROTOCOL_ERROR; |
| 2032 | goto fail; |
| 2033 | } |
| 2034 | h2c->mfs = arg; |
| 2035 | break; |
Willy Tarreau | 1b38b46 | 2017-12-03 19:02:28 +0100 | [diff] [blame] | 2036 | case H2_SETTINGS_ENABLE_PUSH: |
| 2037 | if (arg < 0 || arg > 1) { // RFC7540#6.5.2 |
| 2038 | error = H2_ERR_PROTOCOL_ERROR; |
| 2039 | goto fail; |
| 2040 | } |
| 2041 | break; |
Willy Tarreau | 2e2083a | 2019-01-31 10:34:07 +0100 | [diff] [blame] | 2042 | case H2_SETTINGS_MAX_CONCURRENT_STREAMS: |
| 2043 | if (h2c->flags & H2_CF_IS_BACK) { |
| 2044 | /* the limit is only for the backend; for the frontend it is our limit */ |
| 2045 | if ((unsigned int)arg > h2_settings_max_concurrent_streams) |
| 2046 | arg = h2_settings_max_concurrent_streams; |
| 2047 | h2c->streams_limit = arg; |
| 2048 | } |
| 2049 | break; |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2050 | } |
| 2051 | } |
| 2052 | |
| 2053 | /* need to ACK this frame now */ |
| 2054 | h2c->st0 = H2_CS_FRAME_A; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2055 | done: |
| 2056 | TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn); |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2057 | return 1; |
| 2058 | fail: |
Willy Tarreau | 9364a5f | 2019-10-23 11:06:35 +0200 | [diff] [blame] | 2059 | if (!(h2c->flags & H2_CF_IS_BACK)) |
| 2060 | sess_log(h2c->conn->owner); |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2061 | h2c_error(h2c, error); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2062 | out0: |
| 2063 | TRACE_DEVEL("leaving with missing data or error", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn); |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2064 | return 0; |
| 2065 | } |
| 2066 | |
| 2067 | /* try to send an ACK for a settings frame on the connection. Returns > 0 on |
| 2068 | * success or one of the h2_status values. |
| 2069 | */ |
| 2070 | static int h2c_ack_settings(struct h2c *h2c) |
| 2071 | { |
| 2072 | struct buffer *res; |
| 2073 | char str[9]; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2074 | int ret = 0; |
| 2075 | |
| 2076 | TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn); |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2077 | |
| 2078 | if (h2c_mux_busy(h2c, NULL)) { |
| 2079 | h2c->flags |= H2_CF_DEM_MBUSY; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2080 | goto out; |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2081 | } |
| 2082 | |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 2083 | memcpy(str, |
| 2084 | "\x00\x00\x00" /* length : 0 (no data) */ |
| 2085 | "\x04" "\x01" /* type : 4, flags : ACK */ |
| 2086 | "\x00\x00\x00\x00" /* stream ID */, 9); |
| 2087 | |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 2088 | res = br_tail(h2c->mbuf); |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 2089 | retry: |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 2090 | if (!h2_get_buf(h2c, res)) { |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2091 | h2c->flags |= H2_CF_MUX_MALLOC; |
| 2092 | h2c->flags |= H2_CF_DEM_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2093 | goto out; |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2094 | } |
| 2095 | |
Willy Tarreau | ea1b06d | 2018-07-12 09:02:47 +0200 | [diff] [blame] | 2096 | ret = b_istput(res, ist2(str, 9)); |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2097 | if (unlikely(ret <= 0)) { |
| 2098 | if (!ret) { |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 2099 | if ((res = br_tail_add(h2c->mbuf)) != NULL) |
| 2100 | goto retry; |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2101 | h2c->flags |= H2_CF_MUX_MFULL; |
| 2102 | h2c->flags |= H2_CF_DEM_MROOM; |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2103 | } |
| 2104 | else { |
| 2105 | h2c_error(h2c, H2_ERR_INTERNAL_ERROR); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2106 | ret = 0; |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2107 | } |
| 2108 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2109 | out: |
| 2110 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn); |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 2111 | return ret; |
| 2112 | } |
| 2113 | |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 2114 | /* processes a PING frame and schedules an ACK if needed. The caller must pass |
| 2115 | * the pointer to the payload in <payload>. Returns > 0 on success or zero on |
Willy Tarreau | b860c73 | 2019-01-30 15:39:55 +0100 | [diff] [blame] | 2116 | * missing data. The caller must have already verified frame length |
| 2117 | * and stream ID validity. |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 2118 | */ |
| 2119 | static int h2c_handle_ping(struct h2c *h2c) |
| 2120 | { |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 2121 | /* schedule a response */ |
Willy Tarreau | 68ed641 | 2017-12-03 18:15:56 +0100 | [diff] [blame] | 2122 | if (!(h2c->dff & H2_F_PING_ACK)) |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 2123 | h2c->st0 = H2_CS_FRAME_A; |
| 2124 | return 1; |
| 2125 | } |
| 2126 | |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2127 | /* Try to send a window update for stream id <sid> and value <increment>. |
| 2128 | * Returns > 0 on success or zero on missing room or failure. It may return an |
| 2129 | * error in h2c. |
| 2130 | */ |
| 2131 | static int h2c_send_window_update(struct h2c *h2c, int sid, uint32_t increment) |
| 2132 | { |
| 2133 | struct buffer *res; |
| 2134 | char str[13]; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2135 | int ret = 0; |
| 2136 | |
| 2137 | TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn); |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2138 | |
| 2139 | if (h2c_mux_busy(h2c, NULL)) { |
| 2140 | h2c->flags |= H2_CF_DEM_MBUSY; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2141 | goto out; |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2142 | } |
| 2143 | |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 2144 | /* length: 4, type: 8, flags: none */ |
| 2145 | memcpy(str, "\x00\x00\x04\x08\x00", 5); |
| 2146 | write_n32(str + 5, sid); |
| 2147 | write_n32(str + 9, increment); |
| 2148 | |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 2149 | res = br_tail(h2c->mbuf); |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 2150 | retry: |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 2151 | if (!h2_get_buf(h2c, res)) { |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2152 | h2c->flags |= H2_CF_MUX_MALLOC; |
| 2153 | h2c->flags |= H2_CF_DEM_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2154 | goto out; |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2155 | } |
| 2156 | |
Willy Tarreau | ea1b06d | 2018-07-12 09:02:47 +0200 | [diff] [blame] | 2157 | ret = b_istput(res, ist2(str, 13)); |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2158 | if (unlikely(ret <= 0)) { |
| 2159 | if (!ret) { |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 2160 | if ((res = br_tail_add(h2c->mbuf)) != NULL) |
| 2161 | goto retry; |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2162 | h2c->flags |= H2_CF_MUX_MFULL; |
| 2163 | h2c->flags |= H2_CF_DEM_MROOM; |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2164 | } |
| 2165 | else { |
| 2166 | h2c_error(h2c, H2_ERR_INTERNAL_ERROR); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2167 | ret = 0; |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2168 | } |
| 2169 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2170 | out: |
| 2171 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn); |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2172 | return ret; |
| 2173 | } |
| 2174 | |
| 2175 | /* try to send pending window update for the connection. It's safe to call it |
| 2176 | * with no pending updates. Returns > 0 on success or zero on missing room or |
| 2177 | * failure. It may return an error in h2c. |
| 2178 | */ |
| 2179 | static int h2c_send_conn_wu(struct h2c *h2c) |
| 2180 | { |
| 2181 | int ret = 1; |
| 2182 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2183 | TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn); |
| 2184 | |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2185 | if (h2c->rcvd_c <= 0) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2186 | goto out; |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2187 | |
Willy Tarreau | 97aaa67 | 2018-12-23 09:49:04 +0100 | [diff] [blame] | 2188 | if (!(h2c->flags & H2_CF_WINDOW_OPENED)) { |
| 2189 | /* increase the advertised connection window to 2G on |
| 2190 | * first update. |
| 2191 | */ |
| 2192 | h2c->flags |= H2_CF_WINDOW_OPENED; |
| 2193 | h2c->rcvd_c += H2_INITIAL_WINDOW_INCREMENT; |
| 2194 | } |
| 2195 | |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2196 | /* send WU for the connection */ |
| 2197 | ret = h2c_send_window_update(h2c, 0, h2c->rcvd_c); |
| 2198 | if (ret > 0) |
| 2199 | h2c->rcvd_c = 0; |
| 2200 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2201 | out: |
| 2202 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn); |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2203 | return ret; |
| 2204 | } |
| 2205 | |
| 2206 | /* try to send pending window update for the current dmux stream. It's safe to |
| 2207 | * call it with no pending updates. Returns > 0 on success or zero on missing |
| 2208 | * room or failure. It may return an error in h2c. |
| 2209 | */ |
| 2210 | static int h2c_send_strm_wu(struct h2c *h2c) |
| 2211 | { |
| 2212 | int ret = 1; |
| 2213 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2214 | TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn); |
| 2215 | |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2216 | if (h2c->rcvd_s <= 0) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2217 | goto out; |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2218 | |
| 2219 | /* send WU for the stream */ |
| 2220 | ret = h2c_send_window_update(h2c, h2c->dsi, h2c->rcvd_s); |
| 2221 | if (ret > 0) |
| 2222 | h2c->rcvd_s = 0; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2223 | out: |
| 2224 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn); |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 2225 | return ret; |
| 2226 | } |
| 2227 | |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 2228 | /* try to send an ACK for a ping frame on the connection. Returns > 0 on |
| 2229 | * success, 0 on missing data or one of the h2_status values. |
| 2230 | */ |
| 2231 | static int h2c_ack_ping(struct h2c *h2c) |
| 2232 | { |
| 2233 | struct buffer *res; |
| 2234 | char str[17]; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2235 | int ret = 0; |
| 2236 | |
| 2237 | TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn); |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 2238 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2239 | if (b_data(&h2c->dbuf) < 8) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2240 | goto out; |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 2241 | |
| 2242 | if (h2c_mux_busy(h2c, NULL)) { |
| 2243 | h2c->flags |= H2_CF_DEM_MBUSY; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2244 | goto out; |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 2245 | } |
| 2246 | |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 2247 | memcpy(str, |
| 2248 | "\x00\x00\x08" /* length : 8 (same payload) */ |
| 2249 | "\x06" "\x01" /* type : 6, flags : ACK */ |
| 2250 | "\x00\x00\x00\x00" /* stream ID */, 9); |
| 2251 | |
| 2252 | /* copy the original payload */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2253 | h2_get_buf_bytes(str + 9, 8, &h2c->dbuf, 0); |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 2254 | |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 2255 | res = br_tail(h2c->mbuf); |
| 2256 | retry: |
| 2257 | if (!h2_get_buf(h2c, res)) { |
| 2258 | h2c->flags |= H2_CF_MUX_MALLOC; |
| 2259 | h2c->flags |= H2_CF_DEM_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2260 | goto out; |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 2261 | } |
| 2262 | |
Willy Tarreau | ea1b06d | 2018-07-12 09:02:47 +0200 | [diff] [blame] | 2263 | ret = b_istput(res, ist2(str, 17)); |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 2264 | if (unlikely(ret <= 0)) { |
| 2265 | if (!ret) { |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 2266 | if ((res = br_tail_add(h2c->mbuf)) != NULL) |
| 2267 | goto retry; |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 2268 | h2c->flags |= H2_CF_MUX_MFULL; |
| 2269 | h2c->flags |= H2_CF_DEM_MROOM; |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 2270 | } |
| 2271 | else { |
| 2272 | h2c_error(h2c, H2_ERR_INTERNAL_ERROR); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2273 | ret = 0; |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 2274 | } |
| 2275 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2276 | out: |
| 2277 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn); |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 2278 | return ret; |
| 2279 | } |
| 2280 | |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 2281 | /* processes a WINDOW_UPDATE frame whose payload is <payload> for <plen> bytes. |
| 2282 | * Returns > 0 on success or zero on missing data. It may return an error in |
Willy Tarreau | b860c73 | 2019-01-30 15:39:55 +0100 | [diff] [blame] | 2283 | * h2c or h2s. The caller must have already verified frame length and stream ID |
| 2284 | * validity. Described in RFC7540#6.9. |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 2285 | */ |
| 2286 | static int h2c_handle_window_update(struct h2c *h2c, struct h2s *h2s) |
| 2287 | { |
| 2288 | int32_t inc; |
| 2289 | int error; |
| 2290 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2291 | TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn); |
| 2292 | |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 2293 | /* process full frame only */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2294 | if (b_data(&h2c->dbuf) < h2c->dfl) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2295 | goto out0; |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 2296 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2297 | inc = h2_get_n32(&h2c->dbuf, 0); |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 2298 | |
| 2299 | if (h2c->dsi != 0) { |
| 2300 | /* stream window update */ |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 2301 | |
| 2302 | /* it's not an error to receive WU on a closed stream */ |
| 2303 | if (h2s->st == H2_SS_CLOSED) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2304 | goto done; |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 2305 | |
| 2306 | if (!inc) { |
| 2307 | error = H2_ERR_PROTOCOL_ERROR; |
| 2308 | goto strm_err; |
| 2309 | } |
| 2310 | |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 2311 | if (h2s_mws(h2s) >= 0 && h2s_mws(h2s) + inc < 0) { |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 2312 | error = H2_ERR_FLOW_CONTROL_ERROR; |
| 2313 | goto strm_err; |
| 2314 | } |
| 2315 | |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 2316 | h2s->sws += inc; |
| 2317 | if (h2s_mws(h2s) > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) { |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 2318 | h2s->flags &= ~H2_SF_BLK_SFCTL; |
Willy Tarreau | 9edf6db | 2019-10-02 10:49:59 +0200 | [diff] [blame] | 2319 | LIST_DEL_INIT(&h2s->list); |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 2320 | if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) || |
| 2321 | h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) |
Olivier Houchard | dddfe31 | 2018-10-10 18:51:00 +0200 | [diff] [blame] | 2322 | LIST_ADDQ(&h2c->send_list, &h2s->list); |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 2323 | } |
| 2324 | } |
| 2325 | else { |
| 2326 | /* connection window update */ |
| 2327 | if (!inc) { |
| 2328 | error = H2_ERR_PROTOCOL_ERROR; |
| 2329 | goto conn_err; |
| 2330 | } |
| 2331 | |
| 2332 | if (h2c->mws >= 0 && h2c->mws + inc < 0) { |
| 2333 | error = H2_ERR_FLOW_CONTROL_ERROR; |
| 2334 | goto conn_err; |
| 2335 | } |
| 2336 | |
| 2337 | h2c->mws += inc; |
| 2338 | } |
| 2339 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2340 | done: |
| 2341 | TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn); |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 2342 | return 1; |
| 2343 | |
| 2344 | conn_err: |
| 2345 | h2c_error(h2c, error); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2346 | out0: |
| 2347 | TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn); |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 2348 | return 0; |
| 2349 | |
| 2350 | strm_err: |
Willy Tarreau | 6432dc8 | 2019-01-30 15:42:44 +0100 | [diff] [blame] | 2351 | h2s_error(h2s, error); |
| 2352 | h2c->st0 = H2_CS_FRAME_E; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2353 | TRACE_DEVEL("leaving on stream error", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn); |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 2354 | return 0; |
| 2355 | } |
| 2356 | |
Willy Tarreau | e96b092 | 2017-10-30 00:28:29 +0100 | [diff] [blame] | 2357 | /* processes a GOAWAY frame, and signals all streams whose ID is greater than |
Willy Tarreau | b860c73 | 2019-01-30 15:39:55 +0100 | [diff] [blame] | 2358 | * the last ID. Returns > 0 on success or zero on missing data. The caller must |
| 2359 | * have already verified frame length and stream ID validity. Described in |
| 2360 | * RFC7540#6.8. |
Willy Tarreau | e96b092 | 2017-10-30 00:28:29 +0100 | [diff] [blame] | 2361 | */ |
| 2362 | static int h2c_handle_goaway(struct h2c *h2c) |
| 2363 | { |
Willy Tarreau | e96b092 | 2017-10-30 00:28:29 +0100 | [diff] [blame] | 2364 | int last; |
| 2365 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2366 | TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn); |
Willy Tarreau | e96b092 | 2017-10-30 00:28:29 +0100 | [diff] [blame] | 2367 | /* process full frame only */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2368 | if (b_data(&h2c->dbuf) < h2c->dfl) { |
| 2369 | TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn); |
Willy Tarreau | e96b092 | 2017-10-30 00:28:29 +0100 | [diff] [blame] | 2370 | return 0; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2371 | } |
Willy Tarreau | e96b092 | 2017-10-30 00:28:29 +0100 | [diff] [blame] | 2372 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2373 | last = h2_get_n32(&h2c->dbuf, 0); |
| 2374 | h2c->errcode = h2_get_n32(&h2c->dbuf, 4); |
Willy Tarreau | 11cc2d6 | 2017-12-03 10:27:47 +0100 | [diff] [blame] | 2375 | if (h2c->last_sid < 0) |
| 2376 | h2c->last_sid = last; |
Willy Tarreau | 2348291 | 2019-05-07 15:23:14 +0200 | [diff] [blame] | 2377 | h2_wake_some_streams(h2c, last); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2378 | TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn); |
Willy Tarreau | e96b092 | 2017-10-30 00:28:29 +0100 | [diff] [blame] | 2379 | return 1; |
Willy Tarreau | e96b092 | 2017-10-30 00:28:29 +0100 | [diff] [blame] | 2380 | } |
| 2381 | |
Willy Tarreau | 92153fc | 2017-12-03 19:46:19 +0100 | [diff] [blame] | 2382 | /* processes a PRIORITY frame, and either skips it or rejects if it is |
Willy Tarreau | b860c73 | 2019-01-30 15:39:55 +0100 | [diff] [blame] | 2383 | * invalid. Returns > 0 on success or zero on missing data. It may return an |
| 2384 | * error in h2c. The caller must have already verified frame length and stream |
| 2385 | * ID validity. Described in RFC7540#6.3. |
Willy Tarreau | 92153fc | 2017-12-03 19:46:19 +0100 | [diff] [blame] | 2386 | */ |
| 2387 | static int h2c_handle_priority(struct h2c *h2c) |
| 2388 | { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2389 | TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn); |
| 2390 | |
Willy Tarreau | 92153fc | 2017-12-03 19:46:19 +0100 | [diff] [blame] | 2391 | /* process full frame only */ |
Willy Tarreau | e7bbbca | 2019-08-30 15:02:22 +0200 | [diff] [blame] | 2392 | if (b_data(&h2c->dbuf) < h2c->dfl) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2393 | TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn); |
Willy Tarreau | 92153fc | 2017-12-03 19:46:19 +0100 | [diff] [blame] | 2394 | return 0; |
Willy Tarreau | e7bbbca | 2019-08-30 15:02:22 +0200 | [diff] [blame] | 2395 | } |
Willy Tarreau | 92153fc | 2017-12-03 19:46:19 +0100 | [diff] [blame] | 2396 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2397 | if (h2_get_n32(&h2c->dbuf, 0) == h2c->dsi) { |
Willy Tarreau | 92153fc | 2017-12-03 19:46:19 +0100 | [diff] [blame] | 2398 | /* 7540#5.3 : can't depend on itself */ |
Willy Tarreau | b860c73 | 2019-01-30 15:39:55 +0100 | [diff] [blame] | 2399 | h2c_error(h2c, H2_ERR_PROTOCOL_ERROR); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2400 | TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn); |
Willy Tarreau | b860c73 | 2019-01-30 15:39:55 +0100 | [diff] [blame] | 2401 | return 0; |
Willy Tarreau | 92153fc | 2017-12-03 19:46:19 +0100 | [diff] [blame] | 2402 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2403 | TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn); |
Willy Tarreau | 92153fc | 2017-12-03 19:46:19 +0100 | [diff] [blame] | 2404 | return 1; |
Willy Tarreau | 92153fc | 2017-12-03 19:46:19 +0100 | [diff] [blame] | 2405 | } |
| 2406 | |
Willy Tarreau | cd234e9 | 2017-08-18 10:59:39 +0200 | [diff] [blame] | 2407 | /* processes an RST_STREAM frame, and sets the 32-bit error code on the stream. |
Willy Tarreau | b860c73 | 2019-01-30 15:39:55 +0100 | [diff] [blame] | 2408 | * Returns > 0 on success or zero on missing data. The caller must have already |
| 2409 | * verified frame length and stream ID validity. Described in RFC7540#6.4. |
Willy Tarreau | cd234e9 | 2017-08-18 10:59:39 +0200 | [diff] [blame] | 2410 | */ |
| 2411 | static int h2c_handle_rst_stream(struct h2c *h2c, struct h2s *h2s) |
| 2412 | { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2413 | TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s); |
| 2414 | |
Willy Tarreau | cd234e9 | 2017-08-18 10:59:39 +0200 | [diff] [blame] | 2415 | /* process full frame only */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2416 | if (b_data(&h2c->dbuf) < h2c->dfl) { |
| 2417 | TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s); |
Willy Tarreau | cd234e9 | 2017-08-18 10:59:39 +0200 | [diff] [blame] | 2418 | return 0; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2419 | } |
Willy Tarreau | cd234e9 | 2017-08-18 10:59:39 +0200 | [diff] [blame] | 2420 | |
| 2421 | /* late RST, already handled */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2422 | if (h2s->st == H2_SS_CLOSED) { |
| 2423 | TRACE_DEVEL("leaving on stream closed", H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s); |
Willy Tarreau | cd234e9 | 2017-08-18 10:59:39 +0200 | [diff] [blame] | 2424 | return 1; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2425 | } |
Willy Tarreau | cd234e9 | 2017-08-18 10:59:39 +0200 | [diff] [blame] | 2426 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2427 | h2s->errcode = h2_get_n32(&h2c->dbuf, 0); |
Willy Tarreau | 00dd078 | 2018-03-01 16:31:34 +0100 | [diff] [blame] | 2428 | h2s_close(h2s); |
Willy Tarreau | cd234e9 | 2017-08-18 10:59:39 +0200 | [diff] [blame] | 2429 | |
| 2430 | if (h2s->cs) { |
Willy Tarreau | ec988c7 | 2018-12-19 18:00:29 +0100 | [diff] [blame] | 2431 | cs_set_error(h2s->cs); |
Willy Tarreau | f830f01 | 2018-12-19 17:44:55 +0100 | [diff] [blame] | 2432 | h2s_alert(h2s); |
Willy Tarreau | cd234e9 | 2017-08-18 10:59:39 +0200 | [diff] [blame] | 2433 | } |
| 2434 | |
| 2435 | h2s->flags |= H2_SF_RST_RCVD; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2436 | TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s); |
Willy Tarreau | cd234e9 | 2017-08-18 10:59:39 +0200 | [diff] [blame] | 2437 | return 1; |
Willy Tarreau | cd234e9 | 2017-08-18 10:59:39 +0200 | [diff] [blame] | 2438 | } |
| 2439 | |
Willy Tarreau | 2a761dc | 2018-02-26 18:50:57 +0100 | [diff] [blame] | 2440 | /* processes a HEADERS frame. Returns h2s on success or NULL on missing data. |
| 2441 | * It may return an error in h2c or h2s. The caller must consider that the |
| 2442 | * return value is the new h2s in case one was allocated (most common case). |
| 2443 | * Described in RFC7540#6.2. Most of the |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2444 | * errors here are reported as connection errors since it's impossible to |
| 2445 | * recover from such errors after the compression context has been altered. |
| 2446 | */ |
Willy Tarreau | 2a761dc | 2018-02-26 18:50:57 +0100 | [diff] [blame] | 2447 | static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s) |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2448 | { |
Willy Tarreau | 5c8cafa | 2018-12-23 11:30:42 +0100 | [diff] [blame] | 2449 | struct buffer rxbuf = BUF_NULL; |
Willy Tarreau | 4790f7c | 2019-01-24 11:33:02 +0100 | [diff] [blame] | 2450 | unsigned long long body_len = 0; |
Willy Tarreau | 5c8cafa | 2018-12-23 11:30:42 +0100 | [diff] [blame] | 2451 | uint32_t flags = 0; |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2452 | int error; |
| 2453 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2454 | TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s); |
| 2455 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2456 | if (!b_size(&h2c->dbuf)) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2457 | goto out; // empty buffer |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2458 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2459 | if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2460 | goto out; // incomplete frame |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2461 | |
| 2462 | /* now either the frame is complete or the buffer is complete */ |
| 2463 | if (h2s->st != H2_SS_IDLE) { |
Willy Tarreau | 88d138e | 2019-01-02 19:38:14 +0100 | [diff] [blame] | 2464 | /* The stream exists/existed, this must be a trailers frame */ |
| 2465 | if (h2s->st != H2_SS_CLOSED) { |
Willy Tarreau | aab1a60 | 2019-05-06 11:12:18 +0200 | [diff] [blame] | 2466 | error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &body_len); |
| 2467 | /* unrecoverable error ? */ |
| 2468 | if (h2c->st0 >= H2_CS_ERROR) |
| 2469 | goto out; |
| 2470 | |
| 2471 | if (error == 0) |
| 2472 | goto out; // missing data |
| 2473 | |
| 2474 | if (error < 0) { |
| 2475 | /* Failed to decode this frame (e.g. too large request) |
| 2476 | * but the HPACK decompressor is still synchronized. |
| 2477 | */ |
| 2478 | h2s_error(h2s, H2_ERR_INTERNAL_ERROR); |
| 2479 | h2c->st0 = H2_CS_FRAME_E; |
Willy Tarreau | 88d138e | 2019-01-02 19:38:14 +0100 | [diff] [blame] | 2480 | goto out; |
Willy Tarreau | aab1a60 | 2019-05-06 11:12:18 +0200 | [diff] [blame] | 2481 | } |
Willy Tarreau | 88d138e | 2019-01-02 19:38:14 +0100 | [diff] [blame] | 2482 | goto done; |
| 2483 | } |
Willy Tarreau | 1f03550 | 2019-01-30 11:44:07 +0100 | [diff] [blame] | 2484 | /* the connection was already killed by an RST, let's consume |
| 2485 | * the data and send another RST. |
| 2486 | */ |
| 2487 | error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len); |
| 2488 | h2s = (struct h2s*)h2_error_stream; |
| 2489 | goto send_rst; |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2490 | } |
| 2491 | else if (h2c->dsi <= h2c->max_id || !(h2c->dsi & 1)) { |
| 2492 | /* RFC7540#5.1.1 stream id > prev ones, and must be odd here */ |
| 2493 | error = H2_ERR_PROTOCOL_ERROR; |
Willy Tarreau | 22de8d3 | 2018-09-05 19:55:58 +0200 | [diff] [blame] | 2494 | sess_log(h2c->conn->owner); |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2495 | goto conn_err; |
| 2496 | } |
Willy Tarreau | 415b1ee | 2019-01-02 13:59:43 +0100 | [diff] [blame] | 2497 | else if (h2c->flags & H2_CF_DEM_TOOMANY) |
| 2498 | goto out; // IDLE but too many cs still present |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2499 | |
Willy Tarreau | 4790f7c | 2019-01-24 11:33:02 +0100 | [diff] [blame] | 2500 | error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len); |
Willy Tarreau | 5c8cafa | 2018-12-23 11:30:42 +0100 | [diff] [blame] | 2501 | |
Willy Tarreau | 2591923 | 2019-01-03 14:48:18 +0100 | [diff] [blame] | 2502 | /* unrecoverable error ? */ |
Willy Tarreau | 5c8cafa | 2018-12-23 11:30:42 +0100 | [diff] [blame] | 2503 | if (h2c->st0 >= H2_CS_ERROR) |
| 2504 | goto out; |
| 2505 | |
Willy Tarreau | 2591923 | 2019-01-03 14:48:18 +0100 | [diff] [blame] | 2506 | if (error <= 0) { |
| 2507 | if (error == 0) |
| 2508 | goto out; // missing data |
| 2509 | |
| 2510 | /* Failed to decode this stream (e.g. too large request) |
| 2511 | * but the HPACK decompressor is still synchronized. |
| 2512 | */ |
| 2513 | h2s = (struct h2s*)h2_error_stream; |
| 2514 | goto send_rst; |
| 2515 | } |
| 2516 | |
Willy Tarreau | 22de8d3 | 2018-09-05 19:55:58 +0200 | [diff] [blame] | 2517 | /* Note: we don't emit any other logs below because ff we return |
Willy Tarreau | a8e4954 | 2018-10-03 18:53:55 +0200 | [diff] [blame] | 2518 | * positively from h2c_frt_stream_new(), the stream will report the error, |
| 2519 | * and if we return in error, h2c_frt_stream_new() will emit the error. |
Willy Tarreau | 22de8d3 | 2018-09-05 19:55:58 +0200 | [diff] [blame] | 2520 | */ |
Willy Tarreau | a8e4954 | 2018-10-03 18:53:55 +0200 | [diff] [blame] | 2521 | h2s = h2c_frt_stream_new(h2c, h2c->dsi); |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2522 | if (!h2s) { |
Willy Tarreau | 96a10c2 | 2018-12-23 18:30:44 +0100 | [diff] [blame] | 2523 | h2s = (struct h2s*)h2_refused_stream; |
| 2524 | goto send_rst; |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2525 | } |
| 2526 | |
| 2527 | h2s->st = H2_SS_OPEN; |
Willy Tarreau | 5c8cafa | 2018-12-23 11:30:42 +0100 | [diff] [blame] | 2528 | h2s->rxbuf = rxbuf; |
| 2529 | h2s->flags |= flags; |
Willy Tarreau | 1915ca2 | 2019-01-24 11:49:37 +0100 | [diff] [blame] | 2530 | h2s->body_len = body_len; |
Willy Tarreau | 5c8cafa | 2018-12-23 11:30:42 +0100 | [diff] [blame] | 2531 | |
Willy Tarreau | 88d138e | 2019-01-02 19:38:14 +0100 | [diff] [blame] | 2532 | done: |
Willy Tarreau | 5c8cafa | 2018-12-23 11:30:42 +0100 | [diff] [blame] | 2533 | if (h2c->dff & H2_F_HEADERS_END_STREAM) |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2534 | h2s->flags |= H2_SF_ES_RCVD; |
Willy Tarreau | 5c8cafa | 2018-12-23 11:30:42 +0100 | [diff] [blame] | 2535 | |
| 2536 | if (h2s->flags & H2_SF_ES_RCVD) { |
Willy Tarreau | fc10f59 | 2019-01-30 19:28:32 +0100 | [diff] [blame] | 2537 | if (h2s->st == H2_SS_OPEN) |
| 2538 | h2s->st = H2_SS_HREM; |
| 2539 | else |
| 2540 | h2s_close(h2s); |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2541 | } |
| 2542 | |
Willy Tarreau | 3a429f0 | 2019-01-03 11:41:50 +0100 | [diff] [blame] | 2543 | /* update the max stream ID if the request is being processed */ |
| 2544 | if (h2s->id > h2c->max_id) |
| 2545 | h2c->max_id = h2s->id; |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2546 | |
Willy Tarreau | 8fecec2 | 2019-08-30 07:29:53 +0200 | [diff] [blame] | 2547 | TRACE_USER("rcvd H2 request ", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW, h2c->conn,, &rxbuf); |
Willy Tarreau | 2a761dc | 2018-02-26 18:50:57 +0100 | [diff] [blame] | 2548 | return h2s; |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2549 | |
| 2550 | conn_err: |
| 2551 | h2c_error(h2c, error); |
Willy Tarreau | 5c8cafa | 2018-12-23 11:30:42 +0100 | [diff] [blame] | 2552 | goto out; |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2553 | |
Willy Tarreau | 5c8cafa | 2018-12-23 11:30:42 +0100 | [diff] [blame] | 2554 | out: |
| 2555 | h2_release_buf(h2c, &rxbuf); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2556 | TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s); |
Willy Tarreau | 2a761dc | 2018-02-26 18:50:57 +0100 | [diff] [blame] | 2557 | return NULL; |
Willy Tarreau | 96a10c2 | 2018-12-23 18:30:44 +0100 | [diff] [blame] | 2558 | |
| 2559 | send_rst: |
| 2560 | /* make the demux send an RST for the current stream. We may only |
| 2561 | * do this if we're certain that the HEADERS frame was properly |
| 2562 | * decompressed so that the HPACK decoder is still kept up to date. |
| 2563 | */ |
| 2564 | h2_release_buf(h2c, &rxbuf); |
| 2565 | h2c->st0 = H2_CS_FRAME_E; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2566 | |
| 2567 | TRACE_USER("rejected H2 request", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn,, &rxbuf); |
| 2568 | TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s); |
Willy Tarreau | 96a10c2 | 2018-12-23 18:30:44 +0100 | [diff] [blame] | 2569 | return h2s; |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 2570 | } |
| 2571 | |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 2572 | /* processes a HEADERS frame. Returns h2s on success or NULL on missing data. |
| 2573 | * It may return an error in h2c or h2s. Described in RFC7540#6.2. Most of the |
| 2574 | * errors here are reported as connection errors since it's impossible to |
| 2575 | * recover from such errors after the compression context has been altered. |
| 2576 | */ |
| 2577 | static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s) |
| 2578 | { |
Christopher Faulet | 6884aa3 | 2019-09-23 15:28:20 +0200 | [diff] [blame] | 2579 | struct buffer rxbuf = BUF_NULL; |
| 2580 | unsigned long long body_len = 0; |
| 2581 | uint32_t flags = 0; |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 2582 | int error; |
| 2583 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2584 | TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s); |
| 2585 | |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 2586 | if (!b_size(&h2c->dbuf)) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2587 | goto fail; // empty buffer |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 2588 | |
| 2589 | if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2590 | goto fail; // incomplete frame |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 2591 | |
Christopher Faulet | 6884aa3 | 2019-09-23 15:28:20 +0200 | [diff] [blame] | 2592 | if (h2s->st != H2_SS_CLOSED) { |
| 2593 | error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &h2s->body_len); |
| 2594 | } |
| 2595 | else { |
| 2596 | /* the connection was already killed by an RST, let's consume |
| 2597 | * the data and send another RST. |
| 2598 | */ |
| 2599 | error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len); |
Christopher Faulet | ea7a778 | 2019-09-26 16:19:13 +0200 | [diff] [blame] | 2600 | h2s = (struct h2s*)h2_error_stream; |
Christopher Faulet | 6884aa3 | 2019-09-23 15:28:20 +0200 | [diff] [blame] | 2601 | h2c->st0 = H2_CS_FRAME_E; |
| 2602 | goto send_rst; |
| 2603 | } |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 2604 | |
Willy Tarreau | 2591923 | 2019-01-03 14:48:18 +0100 | [diff] [blame] | 2605 | /* unrecoverable error ? */ |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 2606 | if (h2c->st0 >= H2_CS_ERROR) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2607 | goto fail; |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 2608 | |
Willy Tarreau | 08bb1d6 | 2019-01-30 16:55:48 +0100 | [diff] [blame] | 2609 | if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) { |
| 2610 | /* RFC7540#5.1 */ |
| 2611 | h2s_error(h2s, H2_ERR_STREAM_CLOSED); |
| 2612 | h2c->st0 = H2_CS_FRAME_E; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2613 | goto fail; |
Willy Tarreau | 08bb1d6 | 2019-01-30 16:55:48 +0100 | [diff] [blame] | 2614 | } |
| 2615 | |
Willy Tarreau | 2591923 | 2019-01-03 14:48:18 +0100 | [diff] [blame] | 2616 | if (error <= 0) { |
| 2617 | if (error == 0) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2618 | goto fail; // missing data |
Willy Tarreau | 2591923 | 2019-01-03 14:48:18 +0100 | [diff] [blame] | 2619 | |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 2620 | /* stream error : send RST_STREAM */ |
Willy Tarreau | 2591923 | 2019-01-03 14:48:18 +0100 | [diff] [blame] | 2621 | h2s_error(h2s, H2_ERR_PROTOCOL_ERROR); |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 2622 | h2c->st0 = H2_CS_FRAME_E; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2623 | goto fail; |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 2624 | } |
| 2625 | |
Christopher Faulet | fa922f0 | 2019-05-07 10:55:17 +0200 | [diff] [blame] | 2626 | if (h2c->dff & H2_F_HEADERS_END_STREAM) |
Willy Tarreau | 45ffc0c | 2019-01-03 09:32:20 +0100 | [diff] [blame] | 2627 | h2s->flags |= H2_SF_ES_RCVD; |
Willy Tarreau | 45ffc0c | 2019-01-03 09:32:20 +0100 | [diff] [blame] | 2628 | |
Willy Tarreau | 927b88b | 2019-03-04 08:03:25 +0100 | [diff] [blame] | 2629 | if (h2s->cs && h2s->cs->flags & CS_FL_ERROR && h2s->st < H2_SS_ERROR) |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 2630 | h2s->st = H2_SS_ERROR; |
Christopher Faulet | fa922f0 | 2019-05-07 10:55:17 +0200 | [diff] [blame] | 2631 | else if (h2s->flags & H2_SF_ES_RCVD) { |
| 2632 | if (h2s->st == H2_SS_OPEN) |
| 2633 | h2s->st = H2_SS_HREM; |
| 2634 | else if (h2s->st == H2_SS_HLOC) |
| 2635 | h2s_close(h2s); |
| 2636 | } |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 2637 | |
Willy Tarreau | 8fecec2 | 2019-08-30 07:29:53 +0200 | [diff] [blame] | 2638 | TRACE_USER("rcvd H2 response", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn,, &h2s->rxbuf); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2639 | TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s); |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 2640 | return h2s; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2641 | fail: |
| 2642 | TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s); |
| 2643 | return NULL; |
Christopher Faulet | 6884aa3 | 2019-09-23 15:28:20 +0200 | [diff] [blame] | 2644 | |
| 2645 | send_rst: |
| 2646 | /* make the demux send an RST for the current stream. We may only |
| 2647 | * do this if we're certain that the HEADERS frame was properly |
| 2648 | * decompressed so that the HPACK decoder is still kept up to date. |
| 2649 | */ |
| 2650 | h2_release_buf(h2c, &rxbuf); |
| 2651 | h2c->st0 = H2_CS_FRAME_E; |
| 2652 | |
| 2653 | TRACE_USER("rejected H2 response", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn,, &rxbuf); |
| 2654 | TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s); |
| 2655 | return h2s; |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 2656 | } |
| 2657 | |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 2658 | /* processes a DATA frame. Returns > 0 on success or zero on missing data. |
| 2659 | * It may return an error in h2c or h2s. Described in RFC7540#6.1. |
| 2660 | */ |
| 2661 | static int h2c_frt_handle_data(struct h2c *h2c, struct h2s *h2s) |
| 2662 | { |
| 2663 | int error; |
| 2664 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2665 | TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s); |
| 2666 | |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 2667 | /* note that empty DATA frames are perfectly valid and sometimes used |
| 2668 | * to signal an end of stream (with the ES flag). |
| 2669 | */ |
| 2670 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2671 | if (!b_size(&h2c->dbuf) && h2c->dfl) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2672 | goto fail; // empty buffer |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 2673 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2674 | if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2675 | goto fail; // incomplete frame |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 2676 | |
| 2677 | /* now either the frame is complete or the buffer is complete */ |
| 2678 | |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 2679 | if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) { |
| 2680 | /* RFC7540#6.1 */ |
| 2681 | error = H2_ERR_STREAM_CLOSED; |
| 2682 | goto strm_err; |
| 2683 | } |
| 2684 | |
Christopher Faulet | 4f09ec8 | 2019-06-19 09:25:58 +0200 | [diff] [blame] | 2685 | if ((h2s->flags & H2_SF_DATA_CLEN) && (h2c->dfl - h2c->dpl) > h2s->body_len) { |
Willy Tarreau | 1915ca2 | 2019-01-24 11:49:37 +0100 | [diff] [blame] | 2686 | /* RFC7540#8.1.2 */ |
| 2687 | error = H2_ERR_PROTOCOL_ERROR; |
| 2688 | goto strm_err; |
| 2689 | } |
| 2690 | |
Willy Tarreau | a56a6de | 2018-02-26 15:59:07 +0100 | [diff] [blame] | 2691 | if (!h2_frt_transfer_data(h2s)) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2692 | goto fail; |
Willy Tarreau | a56a6de | 2018-02-26 15:59:07 +0100 | [diff] [blame] | 2693 | |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 2694 | /* call the upper layers to process the frame, then let the upper layer |
| 2695 | * notify the stream about any change. |
| 2696 | */ |
| 2697 | if (!h2s->cs) { |
Willy Tarreau | 082c457 | 2019-08-06 10:11:02 +0200 | [diff] [blame] | 2698 | /* The upper layer has already closed, this may happen on |
| 2699 | * 4xx/redirects during POST, or when receiving a response |
| 2700 | * from an H2 server after the client has aborted. |
| 2701 | */ |
| 2702 | error = H2_ERR_CANCEL; |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 2703 | goto strm_err; |
| 2704 | } |
| 2705 | |
Willy Tarreau | 8f650c3 | 2017-11-21 19:36:21 +0100 | [diff] [blame] | 2706 | if (h2c->st0 >= H2_CS_ERROR) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2707 | goto fail; |
Willy Tarreau | 8f650c3 | 2017-11-21 19:36:21 +0100 | [diff] [blame] | 2708 | |
Willy Tarreau | 721c974 | 2017-11-07 11:05:42 +0100 | [diff] [blame] | 2709 | if (h2s->st >= H2_SS_ERROR) { |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 2710 | /* stream error : send RST_STREAM */ |
Willy Tarreau | a20a519 | 2017-12-27 11:02:06 +0100 | [diff] [blame] | 2711 | h2c->st0 = H2_CS_FRAME_E; |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 2712 | } |
| 2713 | |
| 2714 | /* check for completion : the callee will change this to FRAME_A or |
| 2715 | * FRAME_H once done. |
| 2716 | */ |
| 2717 | if (h2c->st0 == H2_CS_FRAME_P) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2718 | goto fail; |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 2719 | |
Willy Tarreau | c4134ba | 2017-12-11 18:45:08 +0100 | [diff] [blame] | 2720 | /* last frame */ |
| 2721 | if (h2c->dff & H2_F_DATA_END_STREAM) { |
Christopher Faulet | fa922f0 | 2019-05-07 10:55:17 +0200 | [diff] [blame] | 2722 | h2s->flags |= H2_SF_ES_RCVD; |
Willy Tarreau | fc10f59 | 2019-01-30 19:28:32 +0100 | [diff] [blame] | 2723 | if (h2s->st == H2_SS_OPEN) |
| 2724 | h2s->st = H2_SS_HREM; |
| 2725 | else |
| 2726 | h2s_close(h2s); |
| 2727 | |
Willy Tarreau | 1915ca2 | 2019-01-24 11:49:37 +0100 | [diff] [blame] | 2728 | if (h2s->flags & H2_SF_DATA_CLEN && h2s->body_len) { |
| 2729 | /* RFC7540#8.1.2 */ |
| 2730 | error = H2_ERR_PROTOCOL_ERROR; |
| 2731 | goto strm_err; |
| 2732 | } |
Willy Tarreau | c4134ba | 2017-12-11 18:45:08 +0100 | [diff] [blame] | 2733 | } |
| 2734 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2735 | TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s); |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 2736 | return 1; |
| 2737 | |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 2738 | strm_err: |
Willy Tarreau | 6432dc8 | 2019-01-30 15:42:44 +0100 | [diff] [blame] | 2739 | h2s_error(h2s, error); |
| 2740 | h2c->st0 = H2_CS_FRAME_E; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2741 | fail: |
| 2742 | TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s); |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 2743 | return 0; |
| 2744 | } |
| 2745 | |
Willy Tarreau | 6386481 | 2019-08-07 14:25:20 +0200 | [diff] [blame] | 2746 | /* check that the current frame described in h2c->{dsi,dft,dfl,dff,...} is |
| 2747 | * valid for the current stream state. This is needed only after parsing the |
| 2748 | * frame header but in practice it can be performed at any time during |
| 2749 | * H2_CS_FRAME_P since no state transition happens there. Returns >0 on success |
| 2750 | * or 0 in case of error, in which case either h2s or h2c will carry an error. |
| 2751 | */ |
| 2752 | static int h2_frame_check_vs_state(struct h2c *h2c, struct h2s *h2s) |
| 2753 | { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2754 | TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s); |
| 2755 | |
Willy Tarreau | 6386481 | 2019-08-07 14:25:20 +0200 | [diff] [blame] | 2756 | if (h2s->st == H2_SS_IDLE && |
| 2757 | h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) { |
| 2758 | /* RFC7540#5.1: any frame other than HEADERS or PRIORITY in |
| 2759 | * this state MUST be treated as a connection error |
| 2760 | */ |
| 2761 | h2c_error(h2c, H2_ERR_PROTOCOL_ERROR); |
Willy Tarreau | 9364a5f | 2019-10-23 11:06:35 +0200 | [diff] [blame] | 2762 | if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) { |
Willy Tarreau | 6386481 | 2019-08-07 14:25:20 +0200 | [diff] [blame] | 2763 | /* only log if no other stream can report the error */ |
| 2764 | sess_log(h2c->conn->owner); |
| 2765 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2766 | TRACE_DEVEL("leaving in error (idle&!hdrs&!prio)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s); |
Willy Tarreau | 6386481 | 2019-08-07 14:25:20 +0200 | [diff] [blame] | 2767 | return 0; |
| 2768 | } |
| 2769 | |
Willy Tarreau | 57a1816 | 2019-11-24 14:57:53 +0100 | [diff] [blame] | 2770 | if (h2s->st == H2_SS_IDLE && (h2c->flags & H2_CF_IS_BACK)) { |
| 2771 | /* only PUSH_PROMISE would be permitted here */ |
| 2772 | h2c_error(h2c, H2_ERR_PROTOCOL_ERROR); |
| 2773 | TRACE_DEVEL("leaving in error (idle&back)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s); |
| 2774 | return 0; |
| 2775 | } |
| 2776 | |
Willy Tarreau | 6386481 | 2019-08-07 14:25:20 +0200 | [diff] [blame] | 2777 | if (h2s->st == H2_SS_HREM && h2c->dft != H2_FT_WINDOW_UPDATE && |
| 2778 | h2c->dft != H2_FT_RST_STREAM && h2c->dft != H2_FT_PRIORITY) { |
| 2779 | /* RFC7540#5.1: any frame other than WU/PRIO/RST in |
| 2780 | * this state MUST be treated as a stream error. |
| 2781 | * 6.2, 6.6 and 6.10 further mandate that HEADERS/ |
| 2782 | * PUSH_PROMISE/CONTINUATION cause connection errors. |
| 2783 | */ |
| 2784 | if (h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) |
| 2785 | h2c_error(h2c, H2_ERR_PROTOCOL_ERROR); |
| 2786 | else |
| 2787 | h2s_error(h2s, H2_ERR_STREAM_CLOSED); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2788 | TRACE_DEVEL("leaving in error (hrem&!wu&!rst&!prio)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s); |
Willy Tarreau | 6386481 | 2019-08-07 14:25:20 +0200 | [diff] [blame] | 2789 | return 0; |
| 2790 | } |
| 2791 | |
| 2792 | /* Below the management of frames received in closed state is a |
| 2793 | * bit hackish because the spec makes strong differences between |
| 2794 | * streams closed by receiving RST, sending RST, and seeing ES |
| 2795 | * in both directions. In addition to this, the creation of a |
| 2796 | * new stream reusing the identifier of a closed one will be |
| 2797 | * detected here. Given that we cannot keep track of all closed |
| 2798 | * streams forever, we consider that unknown closed streams were |
| 2799 | * closed on RST received, which allows us to respond with an |
| 2800 | * RST without breaking the connection (eg: to abort a transfer). |
| 2801 | * Some frames have to be silently ignored as well. |
| 2802 | */ |
| 2803 | if (h2s->st == H2_SS_CLOSED && h2c->dsi) { |
| 2804 | if (!(h2c->flags & H2_CF_IS_BACK) && h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) { |
| 2805 | /* #5.1.1: The identifier of a newly |
| 2806 | * established stream MUST be numerically |
| 2807 | * greater than all streams that the initiating |
| 2808 | * endpoint has opened or reserved. This |
| 2809 | * governs streams that are opened using a |
| 2810 | * HEADERS frame and streams that are reserved |
| 2811 | * using PUSH_PROMISE. An endpoint that |
| 2812 | * receives an unexpected stream identifier |
| 2813 | * MUST respond with a connection error. |
| 2814 | */ |
| 2815 | h2c_error(h2c, H2_ERR_STREAM_CLOSED); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2816 | TRACE_DEVEL("leaving in error (closed&hdrmask)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s); |
Willy Tarreau | 6386481 | 2019-08-07 14:25:20 +0200 | [diff] [blame] | 2817 | return 0; |
| 2818 | } |
| 2819 | |
Willy Tarreau | 4c08f12 | 2019-09-26 08:47:15 +0200 | [diff] [blame] | 2820 | if (h2s->flags & H2_SF_RST_RCVD && |
| 2821 | !(h2_ft_bit(h2c->dft) & (H2_FT_HDR_MASK | H2_FT_RST_STREAM_BIT | H2_FT_PRIORITY_BIT | H2_FT_WINDOW_UPDATE_BIT))) { |
Willy Tarreau | 6386481 | 2019-08-07 14:25:20 +0200 | [diff] [blame] | 2822 | /* RFC7540#5.1:closed: an endpoint that |
| 2823 | * receives any frame other than PRIORITY after |
| 2824 | * receiving a RST_STREAM MUST treat that as a |
| 2825 | * stream error of type STREAM_CLOSED. |
| 2826 | * |
| 2827 | * Note that old streams fall into this category |
| 2828 | * and will lead to an RST being sent. |
| 2829 | * |
| 2830 | * However, we cannot generalize this to all frame types. Those |
| 2831 | * carrying compression state must still be processed before |
| 2832 | * being dropped or we'll desynchronize the decoder. This can |
| 2833 | * happen with request trailers received after sending an |
| 2834 | * RST_STREAM, or with header/trailers responses received after |
| 2835 | * sending RST_STREAM (aborted stream). |
Willy Tarreau | 4c08f12 | 2019-09-26 08:47:15 +0200 | [diff] [blame] | 2836 | * |
| 2837 | * In addition, since our CLOSED streams always carry the |
| 2838 | * RST_RCVD bit, we don't want to accidently catch valid |
| 2839 | * frames for a closed stream, i.e. RST/PRIO/WU. |
Willy Tarreau | 6386481 | 2019-08-07 14:25:20 +0200 | [diff] [blame] | 2840 | */ |
| 2841 | h2s_error(h2s, H2_ERR_STREAM_CLOSED); |
| 2842 | h2c->st0 = H2_CS_FRAME_E; |
Christopher Faulet | 6884aa3 | 2019-09-23 15:28:20 +0200 | [diff] [blame] | 2843 | TRACE_DEVEL("leaving in error (rst_rcvd&!hdrmask)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s); |
Willy Tarreau | 6386481 | 2019-08-07 14:25:20 +0200 | [diff] [blame] | 2844 | return 0; |
| 2845 | } |
| 2846 | |
| 2847 | /* RFC7540#5.1:closed: if this state is reached as a |
| 2848 | * result of sending a RST_STREAM frame, the peer that |
| 2849 | * receives the RST_STREAM might have already sent |
| 2850 | * frames on the stream that cannot be withdrawn. An |
| 2851 | * endpoint MUST ignore frames that it receives on |
| 2852 | * closed streams after it has sent a RST_STREAM |
| 2853 | * frame. An endpoint MAY choose to limit the period |
| 2854 | * over which it ignores frames and treat frames that |
| 2855 | * arrive after this time as being in error. |
| 2856 | */ |
| 2857 | if (h2s->id && !(h2s->flags & H2_SF_RST_SENT)) { |
| 2858 | /* RFC7540#5.1:closed: any frame other than |
| 2859 | * PRIO/WU/RST in this state MUST be treated as |
| 2860 | * a connection error |
| 2861 | */ |
| 2862 | if (h2c->dft != H2_FT_RST_STREAM && |
| 2863 | h2c->dft != H2_FT_PRIORITY && |
| 2864 | h2c->dft != H2_FT_WINDOW_UPDATE) { |
| 2865 | h2c_error(h2c, H2_ERR_STREAM_CLOSED); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2866 | TRACE_DEVEL("leaving in error (rst_sent&!rst&!prio&!wu)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s); |
Willy Tarreau | 6386481 | 2019-08-07 14:25:20 +0200 | [diff] [blame] | 2867 | return 0; |
| 2868 | } |
| 2869 | } |
| 2870 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2871 | TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s); |
Willy Tarreau | 6386481 | 2019-08-07 14:25:20 +0200 | [diff] [blame] | 2872 | return 1; |
| 2873 | } |
| 2874 | |
Willy Tarreau | bc93393 | 2017-10-09 16:21:43 +0200 | [diff] [blame] | 2875 | /* process Rx frames to be demultiplexed */ |
| 2876 | static void h2_process_demux(struct h2c *h2c) |
| 2877 | { |
Willy Tarreau | 2a761dc | 2018-02-26 18:50:57 +0100 | [diff] [blame] | 2878 | struct h2s *h2s = NULL, *tmp_h2s; |
Willy Tarreau | 54f46e5 | 2019-01-30 15:11:03 +0100 | [diff] [blame] | 2879 | struct h2_fh hdr; |
| 2880 | unsigned int padlen = 0; |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 2881 | int32_t old_iw = h2c->miw; |
Willy Tarreau | f3ee069 | 2017-10-17 08:18:25 +0200 | [diff] [blame] | 2882 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2883 | TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn); |
| 2884 | |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 2885 | if (h2c->st0 >= H2_CS_ERROR) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2886 | goto out; |
Willy Tarreau | 52eed75 | 2017-09-22 15:05:09 +0200 | [diff] [blame] | 2887 | |
| 2888 | if (unlikely(h2c->st0 < H2_CS_FRAME_H)) { |
| 2889 | if (h2c->st0 == H2_CS_PREFACE) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2890 | TRACE_STATE("expecting preface", H2_EV_RX_PREFACE, h2c->conn); |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 2891 | if (h2c->flags & H2_CF_IS_BACK) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2892 | goto out; |
| 2893 | |
Willy Tarreau | 52eed75 | 2017-09-22 15:05:09 +0200 | [diff] [blame] | 2894 | if (unlikely(h2c_frt_recv_preface(h2c) <= 0)) { |
| 2895 | /* RFC7540#3.5: a GOAWAY frame MAY be omitted */ |
Willy Tarreau | 22de8d3 | 2018-09-05 19:55:58 +0200 | [diff] [blame] | 2896 | if (h2c->st0 == H2_CS_ERROR) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2897 | TRACE_PROTO("failed to receive preface", H2_EV_RX_PREFACE|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | 52eed75 | 2017-09-22 15:05:09 +0200 | [diff] [blame] | 2898 | h2c->st0 = H2_CS_ERROR2; |
Willy Tarreau | 22de8d3 | 2018-09-05 19:55:58 +0200 | [diff] [blame] | 2899 | sess_log(h2c->conn->owner); |
| 2900 | } |
Willy Tarreau | 52eed75 | 2017-09-22 15:05:09 +0200 | [diff] [blame] | 2901 | goto fail; |
| 2902 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2903 | TRACE_PROTO("received preface", H2_EV_RX_PREFACE, h2c->conn); |
Willy Tarreau | 52eed75 | 2017-09-22 15:05:09 +0200 | [diff] [blame] | 2904 | |
| 2905 | h2c->max_id = 0; |
| 2906 | h2c->st0 = H2_CS_SETTINGS1; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2907 | TRACE_STATE("switching to SETTINGS1", H2_EV_RX_PREFACE, h2c->conn); |
Willy Tarreau | 52eed75 | 2017-09-22 15:05:09 +0200 | [diff] [blame] | 2908 | } |
Willy Tarreau | 4c3690b | 2017-10-10 15:16:55 +0200 | [diff] [blame] | 2909 | |
| 2910 | if (h2c->st0 == H2_CS_SETTINGS1) { |
Willy Tarreau | 4c3690b | 2017-10-10 15:16:55 +0200 | [diff] [blame] | 2911 | /* ensure that what is pending is a valid SETTINGS frame |
| 2912 | * without an ACK. |
| 2913 | */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2914 | TRACE_STATE("expecting settings", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_SETTINGS, h2c->conn); |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 2915 | if (!h2_get_frame_hdr(&h2c->dbuf, &hdr)) { |
Willy Tarreau | 4c3690b | 2017-10-10 15:16:55 +0200 | [diff] [blame] | 2916 | /* RFC7540#3.5: a GOAWAY frame MAY be omitted */ |
Willy Tarreau | 22de8d3 | 2018-09-05 19:55:58 +0200 | [diff] [blame] | 2917 | if (h2c->st0 == H2_CS_ERROR) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2918 | TRACE_PROTO("failed to receive settings", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_SETTINGS|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | 4c3690b | 2017-10-10 15:16:55 +0200 | [diff] [blame] | 2919 | h2c->st0 = H2_CS_ERROR2; |
Willy Tarreau | 9364a5f | 2019-10-23 11:06:35 +0200 | [diff] [blame] | 2920 | if (!(h2c->flags & H2_CF_IS_BACK)) |
| 2921 | sess_log(h2c->conn->owner); |
Willy Tarreau | 22de8d3 | 2018-09-05 19:55:58 +0200 | [diff] [blame] | 2922 | } |
Willy Tarreau | 4c3690b | 2017-10-10 15:16:55 +0200 | [diff] [blame] | 2923 | goto fail; |
| 2924 | } |
| 2925 | |
| 2926 | if (hdr.sid || hdr.ft != H2_FT_SETTINGS || hdr.ff & H2_F_SETTINGS_ACK) { |
| 2927 | /* RFC7540#3.5: a GOAWAY frame MAY be omitted */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2928 | TRACE_PROTO("unexpected frame type or flags", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_SETTINGS|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | 4c3690b | 2017-10-10 15:16:55 +0200 | [diff] [blame] | 2929 | h2c_error(h2c, H2_ERR_PROTOCOL_ERROR); |
| 2930 | h2c->st0 = H2_CS_ERROR2; |
Willy Tarreau | 9364a5f | 2019-10-23 11:06:35 +0200 | [diff] [blame] | 2931 | if (!(h2c->flags & H2_CF_IS_BACK)) |
| 2932 | sess_log(h2c->conn->owner); |
Willy Tarreau | 4c3690b | 2017-10-10 15:16:55 +0200 | [diff] [blame] | 2933 | goto fail; |
| 2934 | } |
| 2935 | |
Willy Tarreau | 3f0e1ec | 2018-04-17 10:28:27 +0200 | [diff] [blame] | 2936 | if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) { |
Willy Tarreau | 4c3690b | 2017-10-10 15:16:55 +0200 | [diff] [blame] | 2937 | /* RFC7540#3.5: a GOAWAY frame MAY be omitted */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2938 | TRACE_PROTO("invalid settings frame length", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_SETTINGS|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | 4c3690b | 2017-10-10 15:16:55 +0200 | [diff] [blame] | 2939 | h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR); |
| 2940 | h2c->st0 = H2_CS_ERROR2; |
Willy Tarreau | 9364a5f | 2019-10-23 11:06:35 +0200 | [diff] [blame] | 2941 | if (!(h2c->flags & H2_CF_IS_BACK)) |
| 2942 | sess_log(h2c->conn->owner); |
Willy Tarreau | 4c3690b | 2017-10-10 15:16:55 +0200 | [diff] [blame] | 2943 | goto fail; |
| 2944 | } |
| 2945 | |
Willy Tarreau | 3bf6918 | 2018-12-21 15:34:50 +0100 | [diff] [blame] | 2946 | /* that's OK, switch to FRAME_P to process it. This is |
| 2947 | * a SETTINGS frame whose header has already been |
| 2948 | * deleted above. |
| 2949 | */ |
Willy Tarreau | 54f46e5 | 2019-01-30 15:11:03 +0100 | [diff] [blame] | 2950 | padlen = 0; |
| 2951 | goto new_frame; |
Willy Tarreau | 4c3690b | 2017-10-10 15:16:55 +0200 | [diff] [blame] | 2952 | } |
Willy Tarreau | 52eed75 | 2017-09-22 15:05:09 +0200 | [diff] [blame] | 2953 | } |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 2954 | |
| 2955 | /* process as many incoming frames as possible below */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2956 | while (1) { |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 2957 | int ret = 0; |
| 2958 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2959 | if (!b_data(&h2c->dbuf)) { |
| 2960 | TRACE_DEVEL("no more Rx data", H2_EV_RX_FRAME, h2c->conn); |
| 2961 | break; |
| 2962 | } |
| 2963 | |
| 2964 | if (h2c->st0 >= H2_CS_ERROR) { |
| 2965 | TRACE_STATE("end of connection reported", H2_EV_RX_FRAME|H2_EV_RX_EOI, h2c->conn); |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 2966 | break; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2967 | } |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 2968 | |
| 2969 | if (h2c->st0 == H2_CS_FRAME_H) { |
Willy Tarreau | 30d05f3 | 2019-08-06 15:49:51 +0200 | [diff] [blame] | 2970 | h2c->rcvd_s = 0; |
| 2971 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2972 | TRACE_STATE("expecting H2 frame header", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn); |
Willy Tarreau | a4428bd | 2018-12-22 18:11:41 +0100 | [diff] [blame] | 2973 | if (!h2_peek_frame_hdr(&h2c->dbuf, 0, &hdr)) |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 2974 | break; |
| 2975 | |
Willy Tarreau | 3f0e1ec | 2018-04-17 10:28:27 +0200 | [diff] [blame] | 2976 | if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2977 | TRACE_PROTO("invalid H2 frame length", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 2978 | h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR); |
Willy Tarreau | 9364a5f | 2019-10-23 11:06:35 +0200 | [diff] [blame] | 2979 | if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) { |
Willy Tarreau | 22de8d3 | 2018-09-05 19:55:58 +0200 | [diff] [blame] | 2980 | /* only log if no other stream can report the error */ |
| 2981 | sess_log(h2c->conn->owner); |
| 2982 | } |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 2983 | break; |
| 2984 | } |
| 2985 | |
Christopher Faulet | dd2a562 | 2019-06-18 12:22:38 +0200 | [diff] [blame] | 2986 | padlen = 0; |
Willy Tarreau | 3bf6918 | 2018-12-21 15:34:50 +0100 | [diff] [blame] | 2987 | if (h2_ft_bit(hdr.ft) & H2_FT_PADDED_MASK && hdr.ff & H2_F_PADDED) { |
| 2988 | /* If the frame is padded (HEADERS, PUSH_PROMISE or DATA), |
| 2989 | * we read the pad length and drop it from the remaining |
| 2990 | * payload (one byte + the 9 remaining ones = 10 total |
| 2991 | * removed), so we have a frame payload starting after the |
| 2992 | * pad len. Flow controlled frames (DATA) also count the |
| 2993 | * padlen in the flow control, so it must be adjusted. |
| 2994 | */ |
| 2995 | if (hdr.len < 1) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 2996 | TRACE_PROTO("invalid H2 padded frame length", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | 3bf6918 | 2018-12-21 15:34:50 +0100 | [diff] [blame] | 2997 | h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR); |
Willy Tarreau | 9364a5f | 2019-10-23 11:06:35 +0200 | [diff] [blame] | 2998 | if (!(h2c->flags & H2_CF_IS_BACK)) |
| 2999 | sess_log(h2c->conn->owner); |
Willy Tarreau | 3bf6918 | 2018-12-21 15:34:50 +0100 | [diff] [blame] | 3000 | goto fail; |
| 3001 | } |
| 3002 | hdr.len--; |
| 3003 | |
| 3004 | if (b_data(&h2c->dbuf) < 10) |
| 3005 | break; // missing padlen |
| 3006 | |
| 3007 | padlen = *(uint8_t *)b_peek(&h2c->dbuf, 9); |
| 3008 | |
| 3009 | if (padlen > hdr.len) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3010 | TRACE_PROTO("invalid H2 padding length", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | 3bf6918 | 2018-12-21 15:34:50 +0100 | [diff] [blame] | 3011 | /* RFC7540#6.1 : pad length = length of |
| 3012 | * frame payload or greater => error. |
| 3013 | */ |
| 3014 | h2c_error(h2c, H2_ERR_PROTOCOL_ERROR); |
Willy Tarreau | 9364a5f | 2019-10-23 11:06:35 +0200 | [diff] [blame] | 3015 | if (!(h2c->flags & H2_CF_IS_BACK)) |
| 3016 | sess_log(h2c->conn->owner); |
Willy Tarreau | 3bf6918 | 2018-12-21 15:34:50 +0100 | [diff] [blame] | 3017 | goto fail; |
| 3018 | } |
| 3019 | |
| 3020 | if (h2_ft_bit(hdr.ft) & H2_FT_FC_MASK) { |
| 3021 | h2c->rcvd_c++; |
| 3022 | h2c->rcvd_s++; |
| 3023 | } |
| 3024 | b_del(&h2c->dbuf, 1); |
| 3025 | } |
| 3026 | h2_skip_frame_hdr(&h2c->dbuf); |
Willy Tarreau | 54f46e5 | 2019-01-30 15:11:03 +0100 | [diff] [blame] | 3027 | |
| 3028 | new_frame: |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 3029 | h2c->dfl = hdr.len; |
| 3030 | h2c->dsi = hdr.sid; |
| 3031 | h2c->dft = hdr.ft; |
| 3032 | h2c->dff = hdr.ff; |
Willy Tarreau | 3bf6918 | 2018-12-21 15:34:50 +0100 | [diff] [blame] | 3033 | h2c->dpl = padlen; |
Willy Tarreau | 73db434 | 2019-09-25 07:28:44 +0200 | [diff] [blame] | 3034 | TRACE_STATE("rcvd H2 frame header, switching to FRAME_P state", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn); |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 3035 | h2c->st0 = H2_CS_FRAME_P; |
Willy Tarreau | 54f46e5 | 2019-01-30 15:11:03 +0100 | [diff] [blame] | 3036 | |
| 3037 | /* check for minimum basic frame format validity */ |
| 3038 | ret = h2_frame_check(h2c->dft, 1, h2c->dsi, h2c->dfl, global.tune.bufsize); |
| 3039 | if (ret != H2_ERR_NO_ERROR) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3040 | TRACE_PROTO("received invalid H2 frame header", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | 54f46e5 | 2019-01-30 15:11:03 +0100 | [diff] [blame] | 3041 | h2c_error(h2c, ret); |
Willy Tarreau | 9364a5f | 2019-10-23 11:06:35 +0200 | [diff] [blame] | 3042 | if (!(h2c->flags & H2_CF_IS_BACK)) |
| 3043 | sess_log(h2c->conn->owner); |
Willy Tarreau | 54f46e5 | 2019-01-30 15:11:03 +0100 | [diff] [blame] | 3044 | goto fail; |
| 3045 | } |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 3046 | } |
| 3047 | |
Willy Tarreau | 9fd5aa8 | 2019-08-06 15:21:45 +0200 | [diff] [blame] | 3048 | /* Only H2_CS_FRAME_P, H2_CS_FRAME_A and H2_CS_FRAME_E here. |
| 3049 | * H2_CS_FRAME_P indicates an incomplete previous operation |
| 3050 | * (most often the first attempt) and requires some validity |
| 3051 | * checks for the frame and the current state. The two other |
| 3052 | * ones are set after completion (or abortion) and must skip |
| 3053 | * validity checks. |
| 3054 | */ |
Willy Tarreau | 2a761dc | 2018-02-26 18:50:57 +0100 | [diff] [blame] | 3055 | tmp_h2s = h2c_st_by_id(h2c, h2c->dsi); |
| 3056 | |
Willy Tarreau | 567beb8 | 2018-12-18 16:52:44 +0100 | [diff] [blame] | 3057 | if (tmp_h2s != h2s && h2s && h2s->cs && |
| 3058 | (b_data(&h2s->rxbuf) || |
Willy Tarreau | 76c8382 | 2019-06-15 09:55:50 +0200 | [diff] [blame] | 3059 | conn_xprt_read0_pending(h2c->conn) || |
| 3060 | h2s->st == H2_SS_CLOSED || |
Christopher Faulet | fa922f0 | 2019-05-07 10:55:17 +0200 | [diff] [blame] | 3061 | (h2s->flags & H2_SF_ES_RCVD) || |
| 3062 | (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) { |
Willy Tarreau | 2a761dc | 2018-02-26 18:50:57 +0100 | [diff] [blame] | 3063 | /* we may have to signal the upper layers */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3064 | TRACE_DEVEL("notifying stream before switching SID", H2_EV_RX_FRAME|H2_EV_STRM_WAKE, h2c->conn, h2s); |
Willy Tarreau | 2a761dc | 2018-02-26 18:50:57 +0100 | [diff] [blame] | 3065 | h2s->cs->flags |= CS_FL_RCV_MORE; |
Willy Tarreau | 7e09445 | 2018-12-19 18:08:52 +0100 | [diff] [blame] | 3066 | h2s_notify_recv(h2s); |
Willy Tarreau | 2a761dc | 2018-02-26 18:50:57 +0100 | [diff] [blame] | 3067 | } |
| 3068 | h2s = tmp_h2s; |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 3069 | |
Willy Tarreau | 6386481 | 2019-08-07 14:25:20 +0200 | [diff] [blame] | 3070 | if (h2c->st0 == H2_CS_FRAME_E || |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3071 | (h2c->st0 == H2_CS_FRAME_P && !h2_frame_check_vs_state(h2c, h2s))) { |
| 3072 | TRACE_PROTO("stream error reported", H2_EV_RX_FRAME|H2_EV_PROTO_ERR, h2c->conn, h2s); |
Willy Tarreau | f182a9a | 2017-10-30 12:03:50 +0100 | [diff] [blame] | 3073 | goto strm_err; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3074 | } |
Willy Tarreau | c0da196 | 2017-10-30 18:38:00 +0100 | [diff] [blame] | 3075 | |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 3076 | switch (h2c->dft) { |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 3077 | case H2_FT_SETTINGS: |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3078 | if (h2c->st0 == H2_CS_FRAME_P) { |
| 3079 | TRACE_PROTO("receiving H2 SETTINGS frame", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn, h2s); |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 3080 | ret = h2c_handle_settings(h2c); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3081 | } |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 3082 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3083 | if (h2c->st0 == H2_CS_FRAME_A) { |
| 3084 | TRACE_PROTO("sending H2 SETTINGS ACK frame", H2_EV_TX_FRAME|H2_EV_RX_SETTINGS, h2c->conn, h2s); |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 3085 | ret = h2c_ack_settings(h2c); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3086 | } |
Willy Tarreau | 3421aba | 2017-07-27 15:41:03 +0200 | [diff] [blame] | 3087 | break; |
| 3088 | |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 3089 | case H2_FT_PING: |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3090 | if (h2c->st0 == H2_CS_FRAME_P) { |
| 3091 | TRACE_PROTO("receiving H2 PING frame", H2_EV_RX_FRAME|H2_EV_RX_PING, h2c->conn, h2s); |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 3092 | ret = h2c_handle_ping(h2c); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3093 | } |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 3094 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3095 | if (h2c->st0 == H2_CS_FRAME_A) { |
| 3096 | TRACE_PROTO("sending H2 PING ACK frame", H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn, h2s); |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 3097 | ret = h2c_ack_ping(h2c); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3098 | } |
Willy Tarreau | cf68c78 | 2017-10-10 17:11:41 +0200 | [diff] [blame] | 3099 | break; |
| 3100 | |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 3101 | case H2_FT_WINDOW_UPDATE: |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3102 | if (h2c->st0 == H2_CS_FRAME_P) { |
| 3103 | TRACE_PROTO("receiving H2 WINDOW_UPDATE frame", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn, h2s); |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 3104 | ret = h2c_handle_window_update(h2c, h2s); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3105 | } |
Willy Tarreau | 26f9595 | 2017-07-27 17:18:30 +0200 | [diff] [blame] | 3106 | break; |
| 3107 | |
Willy Tarreau | 61290ec | 2017-10-17 08:19:21 +0200 | [diff] [blame] | 3108 | case H2_FT_CONTINUATION: |
Willy Tarreau | ea18f86 | 2018-12-22 20:19:26 +0100 | [diff] [blame] | 3109 | /* RFC7540#6.10: CONTINUATION may only be preceeded by |
| 3110 | * a HEADERS/PUSH_PROMISE/CONTINUATION frame. These |
| 3111 | * frames' parsers consume all following CONTINUATION |
| 3112 | * frames so this one is out of sequence. |
Willy Tarreau | 61290ec | 2017-10-17 08:19:21 +0200 | [diff] [blame] | 3113 | */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3114 | TRACE_PROTO("received unexpected H2 CONTINUATION frame", H2_EV_RX_FRAME|H2_EV_RX_CONT|H2_EV_H2C_ERR, h2c->conn, h2s); |
Willy Tarreau | ea18f86 | 2018-12-22 20:19:26 +0100 | [diff] [blame] | 3115 | h2c_error(h2c, H2_ERR_PROTOCOL_ERROR); |
Willy Tarreau | 9364a5f | 2019-10-23 11:06:35 +0200 | [diff] [blame] | 3116 | if (!(h2c->flags & H2_CF_IS_BACK)) |
| 3117 | sess_log(h2c->conn->owner); |
Willy Tarreau | ea18f86 | 2018-12-22 20:19:26 +0100 | [diff] [blame] | 3118 | goto fail; |
Willy Tarreau | 61290ec | 2017-10-17 08:19:21 +0200 | [diff] [blame] | 3119 | |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 3120 | case H2_FT_HEADERS: |
Willy Tarreau | 2a761dc | 2018-02-26 18:50:57 +0100 | [diff] [blame] | 3121 | if (h2c->st0 == H2_CS_FRAME_P) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3122 | TRACE_PROTO("receiving H2 HEADERS frame", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s); |
Willy Tarreau | c12f38f | 2018-10-08 14:53:27 +0200 | [diff] [blame] | 3123 | if (h2c->flags & H2_CF_IS_BACK) |
| 3124 | tmp_h2s = h2c_bck_handle_headers(h2c, h2s); |
| 3125 | else |
| 3126 | tmp_h2s = h2c_frt_handle_headers(h2c, h2s); |
Willy Tarreau | 2a761dc | 2018-02-26 18:50:57 +0100 | [diff] [blame] | 3127 | if (tmp_h2s) { |
| 3128 | h2s = tmp_h2s; |
| 3129 | ret = 1; |
| 3130 | } |
| 3131 | } |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 3132 | break; |
| 3133 | |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 3134 | case H2_FT_DATA: |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3135 | if (h2c->st0 == H2_CS_FRAME_P) { |
| 3136 | TRACE_PROTO("receiving H2 DATA frame", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s); |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 3137 | ret = h2c_frt_handle_data(h2c, h2s); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3138 | } |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 3139 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3140 | if (h2c->st0 == H2_CS_FRAME_A) { |
| 3141 | TRACE_PROTO("sending stream WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn, h2s); |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 3142 | ret = h2c_send_strm_wu(h2c); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3143 | } |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 3144 | break; |
Willy Tarreau | cd234e9 | 2017-08-18 10:59:39 +0200 | [diff] [blame] | 3145 | |
Willy Tarreau | 92153fc | 2017-12-03 19:46:19 +0100 | [diff] [blame] | 3146 | case H2_FT_PRIORITY: |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3147 | if (h2c->st0 == H2_CS_FRAME_P) { |
| 3148 | TRACE_PROTO("receiving H2 PRIORITY frame", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn, h2s); |
Willy Tarreau | 92153fc | 2017-12-03 19:46:19 +0100 | [diff] [blame] | 3149 | ret = h2c_handle_priority(h2c); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3150 | } |
Willy Tarreau | 92153fc | 2017-12-03 19:46:19 +0100 | [diff] [blame] | 3151 | break; |
| 3152 | |
Willy Tarreau | cd234e9 | 2017-08-18 10:59:39 +0200 | [diff] [blame] | 3153 | case H2_FT_RST_STREAM: |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3154 | if (h2c->st0 == H2_CS_FRAME_P) { |
| 3155 | TRACE_PROTO("receiving H2 RST_STREAM frame", H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s); |
Willy Tarreau | cd234e9 | 2017-08-18 10:59:39 +0200 | [diff] [blame] | 3156 | ret = h2c_handle_rst_stream(h2c, h2s); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3157 | } |
Willy Tarreau | cd234e9 | 2017-08-18 10:59:39 +0200 | [diff] [blame] | 3158 | break; |
| 3159 | |
Willy Tarreau | e96b092 | 2017-10-30 00:28:29 +0100 | [diff] [blame] | 3160 | case H2_FT_GOAWAY: |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3161 | if (h2c->st0 == H2_CS_FRAME_P) { |
| 3162 | TRACE_PROTO("receiving H2 GOAWAY frame", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn, h2s); |
Willy Tarreau | e96b092 | 2017-10-30 00:28:29 +0100 | [diff] [blame] | 3163 | ret = h2c_handle_goaway(h2c); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3164 | } |
Willy Tarreau | e96b092 | 2017-10-30 00:28:29 +0100 | [diff] [blame] | 3165 | break; |
| 3166 | |
Willy Tarreau | 1c66198 | 2017-10-30 13:52:01 +0100 | [diff] [blame] | 3167 | /* implement all extra frame types here */ |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 3168 | default: |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3169 | TRACE_PROTO("receiving H2 ignored frame", H2_EV_RX_FRAME, h2c->conn, h2s); |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 3170 | /* drop frames that we ignore. They may be larger than |
| 3171 | * the buffer so we drain all of their contents until |
| 3172 | * we reach the end. |
| 3173 | */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3174 | ret = MIN(b_data(&h2c->dbuf), h2c->dfl); |
| 3175 | b_del(&h2c->dbuf, ret); |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 3176 | h2c->dfl -= ret; |
| 3177 | ret = h2c->dfl == 0; |
| 3178 | } |
| 3179 | |
Willy Tarreau | f182a9a | 2017-10-30 12:03:50 +0100 | [diff] [blame] | 3180 | strm_err: |
Willy Tarreau | a20a519 | 2017-12-27 11:02:06 +0100 | [diff] [blame] | 3181 | /* We may have to send an RST if not done yet */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3182 | if (h2s->st == H2_SS_ERROR) { |
| 3183 | TRACE_STATE("stream error, switching to FRAME_E", H2_EV_RX_FRAME|H2_EV_H2S_ERR, h2c->conn, h2s); |
Willy Tarreau | a20a519 | 2017-12-27 11:02:06 +0100 | [diff] [blame] | 3184 | h2c->st0 = H2_CS_FRAME_E; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3185 | } |
Willy Tarreau | 27a84c9 | 2017-10-17 08:10:17 +0200 | [diff] [blame] | 3186 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3187 | if (h2c->st0 == H2_CS_FRAME_E) { |
| 3188 | TRACE_PROTO("sending H2 RST_STREAM frame", H2_EV_TX_FRAME|H2_EV_TX_RST|H2_EV_TX_EOI, h2c->conn, h2s); |
Willy Tarreau | a20a519 | 2017-12-27 11:02:06 +0100 | [diff] [blame] | 3189 | ret = h2c_send_rst_stream(h2c, h2s); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3190 | } |
Willy Tarreau | 27a84c9 | 2017-10-17 08:10:17 +0200 | [diff] [blame] | 3191 | |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 3192 | /* error or missing data condition met above ? */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3193 | if (ret <= 0) { |
| 3194 | TRACE_DEVEL("insufficient data to proceed", H2_EV_RX_FRAME, h2c->conn, h2s); |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 3195 | break; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3196 | } |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 3197 | |
| 3198 | if (h2c->st0 != H2_CS_FRAME_H) { |
Christopher Faulet | 5112a60 | 2019-09-26 16:38:28 +0200 | [diff] [blame] | 3199 | TRACE_DEVEL("stream error, skip frame payload", H2_EV_RX_FRAME, h2c->conn, h2s); |
| 3200 | ret = MIN(b_data(&h2c->dbuf), h2c->dfl); |
| 3201 | b_del(&h2c->dbuf, ret); |
| 3202 | h2c->dfl -= ret; |
| 3203 | if (!h2c->dfl) { |
| 3204 | TRACE_STATE("switching to FRAME_H", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn); |
| 3205 | h2c->st0 = H2_CS_FRAME_H; |
| 3206 | h2c->dsi = -1; |
| 3207 | } |
Willy Tarreau | 7e98c05 | 2017-10-10 15:56:59 +0200 | [diff] [blame] | 3208 | } |
| 3209 | } |
Willy Tarreau | 52eed75 | 2017-09-22 15:05:09 +0200 | [diff] [blame] | 3210 | |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 3211 | if (h2c->rcvd_c > 0 && |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3212 | !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))) { |
| 3213 | TRACE_PROTO("sending H2 WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn); |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 3214 | h2c_send_conn_wu(h2c); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3215 | } |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 3216 | |
Willy Tarreau | 52eed75 | 2017-09-22 15:05:09 +0200 | [diff] [blame] | 3217 | fail: |
| 3218 | /* we can go here on missing data, blocked response or error */ |
Willy Tarreau | 567beb8 | 2018-12-18 16:52:44 +0100 | [diff] [blame] | 3219 | if (h2s && h2s->cs && |
| 3220 | (b_data(&h2s->rxbuf) || |
Willy Tarreau | 76c8382 | 2019-06-15 09:55:50 +0200 | [diff] [blame] | 3221 | conn_xprt_read0_pending(h2c->conn) || |
| 3222 | h2s->st == H2_SS_CLOSED || |
Christopher Faulet | fa922f0 | 2019-05-07 10:55:17 +0200 | [diff] [blame] | 3223 | (h2s->flags & H2_SF_ES_RCVD) || |
| 3224 | (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) { |
Willy Tarreau | 2a761dc | 2018-02-26 18:50:57 +0100 | [diff] [blame] | 3225 | /* we may have to signal the upper layers */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3226 | TRACE_DEVEL("notifying stream before switching SID", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn, h2s); |
Willy Tarreau | 2a761dc | 2018-02-26 18:50:57 +0100 | [diff] [blame] | 3227 | h2s->cs->flags |= CS_FL_RCV_MORE; |
Willy Tarreau | 7e09445 | 2018-12-19 18:08:52 +0100 | [diff] [blame] | 3228 | h2s_notify_recv(h2s); |
Willy Tarreau | 2a761dc | 2018-02-26 18:50:57 +0100 | [diff] [blame] | 3229 | } |
Willy Tarreau | 1ed87b7 | 2018-11-25 08:45:16 +0100 | [diff] [blame] | 3230 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3231 | if (old_iw != h2c->miw) { |
| 3232 | TRACE_STATE("notifying streams about SFCTL increase", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn); |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 3233 | h2c_unblock_sfctl(h2c); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3234 | } |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 3235 | |
Olivier Houchard | 3ca18bf | 2019-04-05 15:34:34 +0200 | [diff] [blame] | 3236 | h2c_restart_reading(h2c, 0); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3237 | out: |
| 3238 | TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn); |
Willy Tarreau | bc93393 | 2017-10-09 16:21:43 +0200 | [diff] [blame] | 3239 | } |
| 3240 | |
Willy Tarreau | 989539b | 2020-01-10 17:01:29 +0100 | [diff] [blame] | 3241 | /* resume each h2s eligible for sending in list head <head> */ |
| 3242 | static void h2_resume_each_sending_h2s(struct h2c *h2c, struct list *head) |
| 3243 | { |
| 3244 | struct h2s *h2s, *h2s_back; |
| 3245 | |
| 3246 | TRACE_ENTER(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn); |
| 3247 | |
| 3248 | list_for_each_entry_safe(h2s, h2s_back, head, list) { |
| 3249 | if (h2c->mws <= 0 || |
| 3250 | h2c->flags & H2_CF_MUX_BLOCK_ANY || |
| 3251 | h2c->st0 >= H2_CS_ERROR) |
| 3252 | break; |
| 3253 | |
| 3254 | h2s->flags &= ~H2_SF_BLK_ANY; |
Willy Tarreau | 70c5b0e | 2020-01-10 18:20:15 +0100 | [diff] [blame] | 3255 | |
Willy Tarreau | d946416 | 2020-01-10 18:25:07 +0100 | [diff] [blame] | 3256 | if (h2s->flags & H2_SF_NOTIFIED) |
Willy Tarreau | 70c5b0e | 2020-01-10 18:20:15 +0100 | [diff] [blame] | 3257 | continue; |
| 3258 | |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 3259 | /* If the sender changed his mind and unsubscribed, let's just |
| 3260 | * remove the stream from the send_list. |
Willy Tarreau | 989539b | 2020-01-10 17:01:29 +0100 | [diff] [blame] | 3261 | */ |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 3262 | if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) && |
| 3263 | (!h2s->subs || !(h2s->subs->events & SUB_RETRY_SEND))) { |
Willy Tarreau | 989539b | 2020-01-10 17:01:29 +0100 | [diff] [blame] | 3264 | LIST_DEL_INIT(&h2s->list); |
| 3265 | continue; |
| 3266 | } |
| 3267 | |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 3268 | if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) { |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 3269 | h2s->flags |= H2_SF_NOTIFIED; |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 3270 | tasklet_wakeup(h2s->subs->tasklet); |
| 3271 | h2s->subs->events &= ~SUB_RETRY_SEND; |
| 3272 | if (!h2s->subs->events) |
| 3273 | h2s->subs = NULL; |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 3274 | } |
| 3275 | else if (h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) { |
| 3276 | tasklet_wakeup(h2s->shut_tl); |
| 3277 | } |
Willy Tarreau | 989539b | 2020-01-10 17:01:29 +0100 | [diff] [blame] | 3278 | } |
| 3279 | |
| 3280 | TRACE_LEAVE(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn); |
| 3281 | } |
| 3282 | |
Willy Tarreau | bc93393 | 2017-10-09 16:21:43 +0200 | [diff] [blame] | 3283 | /* process Tx frames from streams to be multiplexed. Returns > 0 if it reached |
| 3284 | * the end. |
| 3285 | */ |
| 3286 | static int h2_process_mux(struct h2c *h2c) |
| 3287 | { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3288 | TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn); |
| 3289 | |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 3290 | if (unlikely(h2c->st0 < H2_CS_FRAME_H)) { |
| 3291 | if (unlikely(h2c->st0 == H2_CS_PREFACE && (h2c->flags & H2_CF_IS_BACK))) { |
| 3292 | if (unlikely(h2c_bck_send_preface(h2c) <= 0)) { |
| 3293 | /* RFC7540#3.5: a GOAWAY frame MAY be omitted */ |
Willy Tarreau | 9364a5f | 2019-10-23 11:06:35 +0200 | [diff] [blame] | 3294 | if (h2c->st0 == H2_CS_ERROR) |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 3295 | h2c->st0 = H2_CS_ERROR2; |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 3296 | goto fail; |
| 3297 | } |
| 3298 | h2c->st0 = H2_CS_SETTINGS1; |
| 3299 | } |
| 3300 | /* need to wait for the other side */ |
Willy Tarreau | 75a930a | 2018-12-12 08:03:58 +0100 | [diff] [blame] | 3301 | if (h2c->st0 < H2_CS_FRAME_H) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3302 | goto done; |
Willy Tarreau | 01b4482 | 2018-10-03 14:26:37 +0200 | [diff] [blame] | 3303 | } |
| 3304 | |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 3305 | /* start by sending possibly pending window updates */ |
Willy Tarreau | e74679a | 2019-08-06 15:39:32 +0200 | [diff] [blame] | 3306 | if (h2c->rcvd_s > 0 && |
| 3307 | !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) && |
| 3308 | h2c_send_strm_wu(h2c) < 0) |
| 3309 | goto fail; |
| 3310 | |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 3311 | if (h2c->rcvd_c > 0 && |
| 3312 | !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) && |
| 3313 | h2c_send_conn_wu(h2c) < 0) |
| 3314 | goto fail; |
| 3315 | |
Willy Tarreau | bacdf5a | 2017-10-17 10:57:04 +0200 | [diff] [blame] | 3316 | /* First we always process the flow control list because the streams |
| 3317 | * waiting there were already elected for immediate emission but were |
| 3318 | * blocked just on this. |
| 3319 | */ |
Willy Tarreau | 989539b | 2020-01-10 17:01:29 +0100 | [diff] [blame] | 3320 | h2_resume_each_sending_h2s(h2c, &h2c->fctl_list); |
| 3321 | h2_resume_each_sending_h2s(h2c, &h2c->send_list); |
Willy Tarreau | bacdf5a | 2017-10-17 10:57:04 +0200 | [diff] [blame] | 3322 | |
Willy Tarreau | cc0b8c3 | 2017-10-26 16:55:59 +0200 | [diff] [blame] | 3323 | fail: |
Willy Tarreau | 3eabe9b | 2017-11-07 11:03:01 +0100 | [diff] [blame] | 3324 | if (unlikely(h2c->st0 >= H2_CS_ERROR)) { |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 3325 | if (h2c->st0 == H2_CS_ERROR) { |
| 3326 | if (h2c->max_id >= 0) { |
| 3327 | h2c_send_goaway_error(h2c, NULL); |
| 3328 | if (h2c->flags & H2_CF_MUX_BLOCK_ANY) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3329 | goto out0; |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 3330 | } |
| 3331 | |
| 3332 | h2c->st0 = H2_CS_ERROR2; // sent (or failed hard) ! |
| 3333 | } |
Willy Tarreau | 081d472 | 2017-05-16 21:51:05 +0200 | [diff] [blame] | 3334 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3335 | done: |
| 3336 | TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn); |
| 3337 | return 1; |
| 3338 | out0: |
| 3339 | TRACE_DEVEL("leaving in blocked situation", H2_EV_H2C_WAKE, h2c->conn); |
| 3340 | return 0; |
Willy Tarreau | bc93393 | 2017-10-09 16:21:43 +0200 | [diff] [blame] | 3341 | } |
| 3342 | |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 3343 | |
Willy Tarreau | 479998a | 2018-11-18 06:30:59 +0100 | [diff] [blame] | 3344 | /* Attempt to read data, and subscribe if none available. |
| 3345 | * The function returns 1 if data has been received, otherwise zero. |
| 3346 | */ |
Olivier Houchard | d4dd22d | 2018-08-17 18:39:46 +0200 | [diff] [blame] | 3347 | static int h2_recv(struct h2c *h2c) |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 3348 | { |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 3349 | struct connection *conn = h2c->conn; |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame] | 3350 | struct buffer *buf; |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 3351 | int max; |
Olivier Houchard | 7505f94 | 2018-08-21 18:10:44 +0200 | [diff] [blame] | 3352 | size_t ret; |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 3353 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3354 | TRACE_ENTER(H2_EV_H2C_RECV, h2c->conn); |
| 3355 | |
| 3356 | if (h2c->wait_event.events & SUB_RETRY_RECV) { |
| 3357 | TRACE_DEVEL("leaving on sub_recv", H2_EV_H2C_RECV, h2c->conn); |
Olivier Houchard | 81a15af | 2018-10-19 17:26:49 +0200 | [diff] [blame] | 3358 | return (b_data(&h2c->dbuf)); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3359 | } |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 3360 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3361 | if (!h2_recv_allowed(h2c)) { |
| 3362 | TRACE_DEVEL("leaving on !recv_allowed", H2_EV_H2C_RECV, h2c->conn); |
Olivier Houchard | 81a15af | 2018-10-19 17:26:49 +0200 | [diff] [blame] | 3363 | return 1; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3364 | } |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 3365 | |
Willy Tarreau | 44e973f | 2018-03-01 17:49:30 +0100 | [diff] [blame] | 3366 | buf = h2_get_buf(h2c, &h2c->dbuf); |
Willy Tarreau | 1b62c5c | 2017-09-25 11:55:01 +0200 | [diff] [blame] | 3367 | if (!buf) { |
| 3368 | h2c->flags |= H2_CF_DEM_DALLOC; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3369 | TRACE_DEVEL("leaving on !alloc", H2_EV_H2C_RECV, h2c->conn); |
Olivier Houchard | d4dd22d | 2018-08-17 18:39:46 +0200 | [diff] [blame] | 3370 | return 0; |
Willy Tarreau | 1b62c5c | 2017-09-25 11:55:01 +0200 | [diff] [blame] | 3371 | } |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame] | 3372 | |
Willy Tarreau | 4d7a884 | 2019-07-31 16:00:48 +0200 | [diff] [blame] | 3373 | b_realign_if_empty(buf); |
| 3374 | if (!b_data(buf)) { |
| 3375 | /* try to pre-align the buffer like the |
| 3376 | * rxbufs will be to optimize memory copies. We'll make |
| 3377 | * sure that the frame header lands at the end of the |
| 3378 | * HTX block to alias it upon recv. We cannot use the |
| 3379 | * head because rcv_buf() will realign the buffer if |
| 3380 | * it's empty. Thus we cheat and pretend we already |
| 3381 | * have a few bytes there. |
| 3382 | */ |
| 3383 | max = buf_room_for_htx_data(buf) + 9; |
| 3384 | buf->head = sizeof(struct htx) - 9; |
| 3385 | } |
| 3386 | else |
| 3387 | max = b_room(buf); |
Willy Tarreau | 2a59e87 | 2018-12-12 08:23:47 +0100 | [diff] [blame] | 3388 | |
Willy Tarreau | 4d7a884 | 2019-07-31 16:00:48 +0200 | [diff] [blame] | 3389 | ret = max ? conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0) : 0; |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 3390 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3391 | if (max && !ret && h2_recv_allowed(h2c)) { |
| 3392 | TRACE_DATA("failed to receive data, subscribing", H2_EV_H2C_RECV, h2c->conn); |
Olivier Houchard | e179d0e | 2019-03-21 18:27:17 +0100 | [diff] [blame] | 3393 | conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h2c->wait_event); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3394 | } else if (ret) |
| 3395 | TRACE_DATA("received data", H2_EV_H2C_RECV, h2c->conn,,, (void*)(long)ret); |
Olivier Houchard | 81a15af | 2018-10-19 17:26:49 +0200 | [diff] [blame] | 3396 | |
Olivier Houchard | a1411e6 | 2018-08-17 18:42:48 +0200 | [diff] [blame] | 3397 | if (!b_data(buf)) { |
Willy Tarreau | 44e973f | 2018-03-01 17:49:30 +0100 | [diff] [blame] | 3398 | h2_release_buf(h2c, &h2c->dbuf); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3399 | TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn); |
Olivier Houchard | 4667773 | 2018-11-29 17:06:17 +0100 | [diff] [blame] | 3400 | return (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn)); |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 3401 | } |
| 3402 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3403 | if (b_data(buf) == buf->size) { |
Willy Tarreau | fbe3b4f | 2017-10-09 15:14:19 +0200 | [diff] [blame] | 3404 | h2c->flags |= H2_CF_DEM_DFULL; |
Willy Tarreau | 35fb846 | 2019-10-02 11:05:46 +0200 | [diff] [blame] | 3405 | TRACE_STATE("demux buffer full", H2_EV_H2C_RECV|H2_EV_H2C_BLK, h2c->conn); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3406 | } |
| 3407 | |
| 3408 | TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn); |
Willy Tarreau | 4d7a884 | 2019-07-31 16:00:48 +0200 | [diff] [blame] | 3409 | return !!ret || (conn->flags & CO_FL_ERROR) || conn_xprt_read0_pending(conn); |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 3410 | } |
| 3411 | |
Willy Tarreau | 479998a | 2018-11-18 06:30:59 +0100 | [diff] [blame] | 3412 | /* Try to send data if possible. |
| 3413 | * The function returns 1 if data have been sent, otherwise zero. |
| 3414 | */ |
Olivier Houchard | d4dd22d | 2018-08-17 18:39:46 +0200 | [diff] [blame] | 3415 | static int h2_send(struct h2c *h2c) |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 3416 | { |
Olivier Houchard | 29fb89d | 2018-08-02 18:56:36 +0200 | [diff] [blame] | 3417 | struct connection *conn = h2c->conn; |
Willy Tarreau | bc93393 | 2017-10-09 16:21:43 +0200 | [diff] [blame] | 3418 | int done; |
Olivier Houchard | d4dd22d | 2018-08-17 18:39:46 +0200 | [diff] [blame] | 3419 | int sent = 0; |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 3420 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3421 | TRACE_ENTER(H2_EV_H2C_SEND, h2c->conn); |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 3422 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3423 | if (conn->flags & CO_FL_ERROR) { |
| 3424 | TRACE_DEVEL("leaving on error", H2_EV_H2C_SEND, h2c->conn); |
| 3425 | return 1; |
| 3426 | } |
Olivier Houchard | 7505f94 | 2018-08-21 18:10:44 +0200 | [diff] [blame] | 3427 | |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 3428 | if (conn->flags & (CO_FL_HANDSHAKE|CO_FL_WAIT_L4_CONN|CO_FL_WAIT_L6_CONN)) { |
| 3429 | /* a handshake was requested */ |
Olivier Houchard | d4dd22d | 2018-08-17 18:39:46 +0200 | [diff] [blame] | 3430 | goto schedule; |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 3431 | } |
| 3432 | |
Willy Tarreau | bc93393 | 2017-10-09 16:21:43 +0200 | [diff] [blame] | 3433 | /* This loop is quite simple : it tries to fill as much as it can from |
| 3434 | * pending streams into the existing buffer until it's reportedly full |
| 3435 | * or the end of send requests is reached. Then it tries to send this |
| 3436 | * buffer's contents out, marks it not full if at least one byte could |
| 3437 | * be sent, and tries again. |
| 3438 | * |
| 3439 | * The snd_buf() function normally takes a "flags" argument which may |
| 3440 | * be made of a combination of CO_SFL_MSG_MORE to indicate that more |
| 3441 | * data immediately comes and CO_SFL_STREAMER to indicate that the |
| 3442 | * connection is streaming lots of data (used to increase TLS record |
| 3443 | * size at the expense of latency). The former can be sent any time |
| 3444 | * there's a buffer full flag, as it indicates at least one stream |
| 3445 | * attempted to send and failed so there are pending data. An |
| 3446 | * alternative would be to set it as long as there's an active stream |
| 3447 | * but that would be problematic for ACKs until we have an absolute |
| 3448 | * guarantee that all waiters have at least one byte to send. The |
| 3449 | * latter should possibly not be set for now. |
| 3450 | */ |
| 3451 | |
| 3452 | done = 0; |
| 3453 | while (!done) { |
| 3454 | unsigned int flags = 0; |
Willy Tarreau | 41c4d6a | 2019-05-26 09:49:17 +0200 | [diff] [blame] | 3455 | unsigned int released = 0; |
| 3456 | struct buffer *buf; |
Willy Tarreau | bc93393 | 2017-10-09 16:21:43 +0200 | [diff] [blame] | 3457 | |
| 3458 | /* fill as much as we can into the current buffer */ |
| 3459 | while (((h2c->flags & (H2_CF_MUX_MFULL|H2_CF_MUX_MALLOC)) == 0) && !done) |
| 3460 | done = h2_process_mux(h2c); |
| 3461 | |
Olivier Houchard | 2b09443 | 2019-01-29 18:28:36 +0100 | [diff] [blame] | 3462 | if (h2c->flags & H2_CF_MUX_MALLOC) |
Willy Tarreau | 7f1265a | 2019-05-29 17:36:37 +0200 | [diff] [blame] | 3463 | done = 1; // we won't go further without extra buffers |
Olivier Houchard | 2b09443 | 2019-01-29 18:28:36 +0100 | [diff] [blame] | 3464 | |
Willy Tarreau | bc93393 | 2017-10-09 16:21:43 +0200 | [diff] [blame] | 3465 | if (conn->flags & CO_FL_ERROR) |
| 3466 | break; |
| 3467 | |
| 3468 | if (h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM)) |
| 3469 | flags |= CO_SFL_MSG_MORE; |
| 3470 | |
Willy Tarreau | 41c4d6a | 2019-05-26 09:49:17 +0200 | [diff] [blame] | 3471 | for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) { |
| 3472 | if (b_data(buf)) { |
| 3473 | int ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, buf, b_data(buf), flags); |
Willy Tarreau | 7f1265a | 2019-05-29 17:36:37 +0200 | [diff] [blame] | 3474 | if (!ret) { |
| 3475 | done = 1; |
Willy Tarreau | 41c4d6a | 2019-05-26 09:49:17 +0200 | [diff] [blame] | 3476 | break; |
Willy Tarreau | 7f1265a | 2019-05-29 17:36:37 +0200 | [diff] [blame] | 3477 | } |
Willy Tarreau | 41c4d6a | 2019-05-26 09:49:17 +0200 | [diff] [blame] | 3478 | sent = 1; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3479 | TRACE_DATA("sent data", H2_EV_H2C_SEND, h2c->conn,, buf, (void*)(long)ret); |
Willy Tarreau | 41c4d6a | 2019-05-26 09:49:17 +0200 | [diff] [blame] | 3480 | b_del(buf, ret); |
Willy Tarreau | 7f1265a | 2019-05-29 17:36:37 +0200 | [diff] [blame] | 3481 | if (b_data(buf)) { |
| 3482 | done = 1; |
Willy Tarreau | 41c4d6a | 2019-05-26 09:49:17 +0200 | [diff] [blame] | 3483 | break; |
Willy Tarreau | 7f1265a | 2019-05-29 17:36:37 +0200 | [diff] [blame] | 3484 | } |
Willy Tarreau | 41c4d6a | 2019-05-26 09:49:17 +0200 | [diff] [blame] | 3485 | } |
| 3486 | b_free(buf); |
| 3487 | released++; |
Willy Tarreau | 787db9a | 2018-06-14 18:31:46 +0200 | [diff] [blame] | 3488 | } |
Willy Tarreau | bc93393 | 2017-10-09 16:21:43 +0200 | [diff] [blame] | 3489 | |
Willy Tarreau | 41c4d6a | 2019-05-26 09:49:17 +0200 | [diff] [blame] | 3490 | if (released) |
Willy Tarreau | 201840a | 2019-05-29 17:50:48 +0200 | [diff] [blame] | 3491 | offer_buffers(NULL, tasks_run_queue); |
Willy Tarreau | 41c4d6a | 2019-05-26 09:49:17 +0200 | [diff] [blame] | 3492 | |
Willy Tarreau | bc93393 | 2017-10-09 16:21:43 +0200 | [diff] [blame] | 3493 | /* wrote at least one byte, the buffer is not full anymore */ |
Christopher Faulet | 69fe5ce | 2019-10-24 10:31:01 +0200 | [diff] [blame] | 3494 | if (sent) |
| 3495 | h2c->flags &= ~(H2_CF_MUX_MFULL | H2_CF_DEM_MROOM); |
Willy Tarreau | bc93393 | 2017-10-09 16:21:43 +0200 | [diff] [blame] | 3496 | } |
| 3497 | |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 3498 | if (conn->flags & CO_FL_SOCK_WR_SH) { |
| 3499 | /* output closed, nothing to send, clear the buffer to release it */ |
Willy Tarreau | 5133096 | 2019-05-26 09:38:07 +0200 | [diff] [blame] | 3500 | b_reset(br_tail(h2c->mbuf)); |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 3501 | } |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 3502 | /* We're not full anymore, so we can wake any task that are waiting |
| 3503 | * for us. |
| 3504 | */ |
Willy Tarreau | 989539b | 2020-01-10 17:01:29 +0100 | [diff] [blame] | 3505 | if (!(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM)) && h2c->st0 >= H2_CS_FRAME_H) |
| 3506 | h2_resume_each_sending_h2s(h2c, &h2c->send_list); |
Olivier Houchard | d360ac6 | 2019-03-22 17:37:16 +0100 | [diff] [blame] | 3507 | |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 3508 | /* We're done, no more to send */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3509 | if (!br_data(h2c->mbuf)) { |
| 3510 | TRACE_DEVEL("leaving with everything sent", H2_EV_H2C_SEND, h2c->conn); |
Olivier Houchard | d4dd22d | 2018-08-17 18:39:46 +0200 | [diff] [blame] | 3511 | return sent; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3512 | } |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 3513 | schedule: |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3514 | if (!(conn->flags & CO_FL_ERROR) && !(h2c->wait_event.events & SUB_RETRY_SEND)) { |
| 3515 | TRACE_STATE("more data to send, subscribing", H2_EV_H2C_SEND, h2c->conn); |
Olivier Houchard | e179d0e | 2019-03-21 18:27:17 +0100 | [diff] [blame] | 3516 | conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &h2c->wait_event); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3517 | } |
Willy Tarreau | 7f1265a | 2019-05-29 17:36:37 +0200 | [diff] [blame] | 3518 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3519 | TRACE_DEVEL("leaving with some data left to send", H2_EV_H2C_SEND, h2c->conn); |
Olivier Houchard | d4dd22d | 2018-08-17 18:39:46 +0200 | [diff] [blame] | 3520 | return sent; |
Olivier Houchard | 29fb89d | 2018-08-02 18:56:36 +0200 | [diff] [blame] | 3521 | } |
| 3522 | |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 3523 | /* this is the tasklet referenced in h2c->wait_event.tasklet */ |
Olivier Houchard | 29fb89d | 2018-08-02 18:56:36 +0200 | [diff] [blame] | 3524 | static struct task *h2_io_cb(struct task *t, void *ctx, unsigned short status) |
| 3525 | { |
| 3526 | struct h2c *h2c = ctx; |
Olivier Houchard | 7505f94 | 2018-08-21 18:10:44 +0200 | [diff] [blame] | 3527 | int ret = 0; |
Olivier Houchard | 29fb89d | 2018-08-02 18:56:36 +0200 | [diff] [blame] | 3528 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3529 | TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn); |
| 3530 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 3531 | if (!(h2c->wait_event.events & SUB_RETRY_SEND)) |
Olivier Houchard | 7505f94 | 2018-08-21 18:10:44 +0200 | [diff] [blame] | 3532 | ret = h2_send(h2c); |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 3533 | if (!(h2c->wait_event.events & SUB_RETRY_RECV)) |
Olivier Houchard | 7505f94 | 2018-08-21 18:10:44 +0200 | [diff] [blame] | 3534 | ret |= h2_recv(h2c); |
Willy Tarreau | cef5c8e | 2018-12-18 10:29:54 +0100 | [diff] [blame] | 3535 | if (ret || b_data(&h2c->dbuf)) |
Olivier Houchard | 7505f94 | 2018-08-21 18:10:44 +0200 | [diff] [blame] | 3536 | h2_process(h2c); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3537 | |
| 3538 | TRACE_LEAVE(H2_EV_H2C_WAKE); |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 3539 | return NULL; |
Willy Tarreau | fbe3b4f | 2017-10-09 15:14:19 +0200 | [diff] [blame] | 3540 | } |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 3541 | |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 3542 | /* callback called on any event by the connection handler. |
| 3543 | * It applies changes and returns zero, or < 0 if it wants immediate |
| 3544 | * destruction of the connection (which normally doesn not happen in h2). |
| 3545 | */ |
Olivier Houchard | 7505f94 | 2018-08-21 18:10:44 +0200 | [diff] [blame] | 3546 | static int h2_process(struct h2c *h2c) |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 3547 | { |
Olivier Houchard | 7505f94 | 2018-08-21 18:10:44 +0200 | [diff] [blame] | 3548 | struct connection *conn = h2c->conn; |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 3549 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3550 | TRACE_ENTER(H2_EV_H2C_WAKE, conn); |
| 3551 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3552 | if (b_data(&h2c->dbuf) && !(h2c->flags & H2_CF_DEM_BLOCK_ANY)) { |
Willy Tarreau | d13bf27 | 2017-12-14 10:34:52 +0100 | [diff] [blame] | 3553 | h2_process_demux(h2c); |
| 3554 | |
| 3555 | if (h2c->st0 >= H2_CS_ERROR || conn->flags & CO_FL_ERROR) |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3556 | b_reset(&h2c->dbuf); |
Willy Tarreau | d13bf27 | 2017-12-14 10:34:52 +0100 | [diff] [blame] | 3557 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3558 | if (!b_full(&h2c->dbuf)) |
Willy Tarreau | d13bf27 | 2017-12-14 10:34:52 +0100 | [diff] [blame] | 3559 | h2c->flags &= ~H2_CF_DEM_DFULL; |
| 3560 | } |
Olivier Houchard | 7505f94 | 2018-08-21 18:10:44 +0200 | [diff] [blame] | 3561 | h2_send(h2c); |
Willy Tarreau | d13bf27 | 2017-12-14 10:34:52 +0100 | [diff] [blame] | 3562 | |
Willy Tarreau | 0b37d65 | 2018-10-03 10:33:02 +0200 | [diff] [blame] | 3563 | if (unlikely(h2c->proxy->state == PR_STSTOPPED)) { |
Willy Tarreau | 8ec1406 | 2017-12-30 18:08:13 +0100 | [diff] [blame] | 3564 | /* frontend is stopping, reload likely in progress, let's try |
| 3565 | * to announce a graceful shutdown if not yet done. We don't |
| 3566 | * care if it fails, it will be tried again later. |
| 3567 | */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3568 | TRACE_STATE("proxy stopped, sending GOAWAY", H2_EV_H2C_WAKE|H2_EV_TX_FRAME, conn); |
Willy Tarreau | 8ec1406 | 2017-12-30 18:08:13 +0100 | [diff] [blame] | 3569 | if (!(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) { |
| 3570 | if (h2c->last_sid < 0) |
| 3571 | h2c->last_sid = (1U << 31) - 1; |
| 3572 | h2c_send_goaway_error(h2c, NULL); |
| 3573 | } |
| 3574 | } |
| 3575 | |
Olivier Houchard | 7fc96d5 | 2017-11-23 18:25:47 +0100 | [diff] [blame] | 3576 | /* |
Olivier Houchard | 6fa63d9 | 2017-11-27 18:41:32 +0100 | [diff] [blame] | 3577 | * If we received early data, and the handshake is done, wake |
| 3578 | * any stream that was waiting for it. |
Olivier Houchard | 7fc96d5 | 2017-11-23 18:25:47 +0100 | [diff] [blame] | 3579 | */ |
Olivier Houchard | 6fa63d9 | 2017-11-27 18:41:32 +0100 | [diff] [blame] | 3580 | if (!(h2c->flags & H2_CF_WAIT_FOR_HS) && |
| 3581 | (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_HANDSHAKE | CO_FL_EARLY_DATA)) == CO_FL_EARLY_DATA) { |
| 3582 | struct eb32_node *node; |
| 3583 | struct h2s *h2s; |
| 3584 | |
| 3585 | h2c->flags |= H2_CF_WAIT_FOR_HS; |
| 3586 | node = eb32_lookup_ge(&h2c->streams_by_id, 1); |
| 3587 | |
| 3588 | while (node) { |
| 3589 | h2s = container_of(node, struct h2s, by_id); |
Willy Tarreau | fde287c | 2018-12-19 18:33:16 +0100 | [diff] [blame] | 3590 | if (h2s->cs && h2s->cs->flags & CS_FL_WAIT_FOR_HS) |
Willy Tarreau | 7e09445 | 2018-12-19 18:08:52 +0100 | [diff] [blame] | 3591 | h2s_notify_recv(h2s); |
Olivier Houchard | 6fa63d9 | 2017-11-27 18:41:32 +0100 | [diff] [blame] | 3592 | node = eb32_next(node); |
| 3593 | } |
Olivier Houchard | 7fc96d5 | 2017-11-23 18:25:47 +0100 | [diff] [blame] | 3594 | } |
Olivier Houchard | 6fa63d9 | 2017-11-27 18:41:32 +0100 | [diff] [blame] | 3595 | |
Willy Tarreau | 26bd761 | 2017-10-09 16:47:04 +0200 | [diff] [blame] | 3596 | if (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn) || |
Willy Tarreau | 29a9824 | 2017-10-31 06:59:15 +0100 | [diff] [blame] | 3597 | h2c->st0 == H2_CS_ERROR2 || h2c->flags & H2_CF_GOAWAY_FAILED || |
| 3598 | (eb_is_empty(&h2c->streams_by_id) && h2c->last_sid >= 0 && |
| 3599 | h2c->max_id >= h2c->last_sid)) { |
Willy Tarreau | 2348291 | 2019-05-07 15:23:14 +0200 | [diff] [blame] | 3600 | h2_wake_some_streams(h2c, 0); |
Willy Tarreau | fbe3b4f | 2017-10-09 15:14:19 +0200 | [diff] [blame] | 3601 | |
| 3602 | if (eb_is_empty(&h2c->streams_by_id)) { |
| 3603 | /* no more stream, kill the connection now */ |
Christopher Faulet | 73c1207 | 2019-04-08 11:23:22 +0200 | [diff] [blame] | 3604 | h2_release(h2c); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3605 | TRACE_DEVEL("leaving after releasing the connection", H2_EV_H2C_WAKE); |
Willy Tarreau | fbe3b4f | 2017-10-09 15:14:19 +0200 | [diff] [blame] | 3606 | return -1; |
| 3607 | } |
Willy Tarreau | 4481e26 | 2019-10-31 15:36:30 +0100 | [diff] [blame] | 3608 | |
| 3609 | /* connections in error must be removed from the idle lists */ |
| 3610 | HA_SPIN_LOCK(OTHER_LOCK, &toremove_lock[tid]); |
| 3611 | MT_LIST_DEL((struct mt_list *)&conn->list); |
| 3612 | HA_SPIN_UNLOCK(OTHER_LOCK, &toremove_lock[tid]); |
| 3613 | } |
| 3614 | else if (h2c->st0 == H2_CS_ERROR) { |
| 3615 | /* connections in error must be removed from the idle lists */ |
| 3616 | HA_SPIN_LOCK(OTHER_LOCK, &toremove_lock[tid]); |
| 3617 | MT_LIST_DEL((struct mt_list *)&conn->list); |
| 3618 | HA_SPIN_UNLOCK(OTHER_LOCK, &toremove_lock[tid]); |
Willy Tarreau | fbe3b4f | 2017-10-09 15:14:19 +0200 | [diff] [blame] | 3619 | } |
| 3620 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 3621 | if (!b_data(&h2c->dbuf)) |
Willy Tarreau | 44e973f | 2018-03-01 17:49:30 +0100 | [diff] [blame] | 3622 | h2_release_buf(h2c, &h2c->dbuf); |
Willy Tarreau | fbe3b4f | 2017-10-09 15:14:19 +0200 | [diff] [blame] | 3623 | |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 3624 | if ((conn->flags & CO_FL_SOCK_WR_SH) || |
| 3625 | h2c->st0 == H2_CS_ERROR2 || (h2c->flags & H2_CF_GOAWAY_FAILED) || |
| 3626 | (h2c->st0 != H2_CS_ERROR && |
Willy Tarreau | 662fafc | 2019-05-26 09:43:07 +0200 | [diff] [blame] | 3627 | !br_data(h2c->mbuf) && |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 3628 | (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) && |
| 3629 | ((h2c->flags & H2_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&h2c->send_list)))) |
Willy Tarreau | 2e3c000 | 2019-05-26 09:45:23 +0200 | [diff] [blame] | 3630 | h2_release_mbuf(h2c); |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 3631 | |
Willy Tarreau | 3f13357 | 2017-10-31 19:21:06 +0100 | [diff] [blame] | 3632 | if (h2c->task) { |
Willy Tarreau | c2ea47f | 2019-10-01 10:12:00 +0200 | [diff] [blame] | 3633 | if (h2c_may_expire(h2c)) |
| 3634 | h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout); |
| 3635 | else |
| 3636 | h2c->task->expire = TICK_ETERNITY; |
Willy Tarreau | 7348119 | 2019-06-07 08:20:46 +0200 | [diff] [blame] | 3637 | task_queue(h2c->task); |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 3638 | } |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 3639 | |
Olivier Houchard | 7505f94 | 2018-08-21 18:10:44 +0200 | [diff] [blame] | 3640 | h2_send(h2c); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3641 | TRACE_LEAVE(H2_EV_H2C_WAKE, conn); |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 3642 | return 0; |
| 3643 | } |
| 3644 | |
Willy Tarreau | 749f5ca | 2019-03-21 19:19:36 +0100 | [diff] [blame] | 3645 | /* wake-up function called by the connection layer (mux_ops.wake) */ |
Olivier Houchard | 21df6cc | 2018-09-14 23:21:44 +0200 | [diff] [blame] | 3646 | static int h2_wake(struct connection *conn) |
| 3647 | { |
Willy Tarreau | 3d2ee55 | 2018-12-19 14:12:10 +0100 | [diff] [blame] | 3648 | struct h2c *h2c = conn->ctx; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3649 | int ret; |
Olivier Houchard | 21df6cc | 2018-09-14 23:21:44 +0200 | [diff] [blame] | 3650 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3651 | TRACE_ENTER(H2_EV_H2C_WAKE, conn); |
| 3652 | ret = h2_process(h2c); |
Olivier Houchard | 477902b | 2020-01-22 18:08:48 +0100 | [diff] [blame] | 3653 | h2_wake_some_streams(h2c, 0); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3654 | TRACE_LEAVE(H2_EV_H2C_WAKE); |
| 3655 | return ret; |
Olivier Houchard | 21df6cc | 2018-09-14 23:21:44 +0200 | [diff] [blame] | 3656 | } |
| 3657 | |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 3658 | /* Connection timeout management. The principle is that if there's no receipt |
| 3659 | * nor sending for a certain amount of time, the connection is closed. If the |
| 3660 | * MUX buffer still has lying data or is not allocatable, the connection is |
| 3661 | * immediately killed. If it's allocatable and empty, we attempt to send a |
| 3662 | * GOAWAY frame. |
| 3663 | */ |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 3664 | static struct task *h2_timeout_task(struct task *t, void *context, unsigned short state) |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 3665 | { |
Olivier Houchard | 9f6af33 | 2018-05-25 14:04:04 +0200 | [diff] [blame] | 3666 | struct h2c *h2c = context; |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 3667 | int expired = tick_is_expired(t->expire, now_ms); |
| 3668 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3669 | TRACE_ENTER(H2_EV_H2C_WAKE, h2c ? h2c->conn : NULL); |
| 3670 | |
| 3671 | if (!expired && h2c) { |
| 3672 | TRACE_DEVEL("leaving (not expired)", H2_EV_H2C_WAKE, h2c->conn); |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 3673 | return t; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3674 | } |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 3675 | |
Willy Tarreau | c2ea47f | 2019-10-01 10:12:00 +0200 | [diff] [blame] | 3676 | if (h2c && !h2c_may_expire(h2c)) { |
| 3677 | /* we do still have streams but all of them are idle, waiting |
| 3678 | * for the data layer, so we must not enforce the timeout here. |
| 3679 | */ |
| 3680 | t->expire = TICK_ETERNITY; |
| 3681 | return t; |
| 3682 | } |
| 3683 | |
Olivier Houchard | 3f795f7 | 2019-04-17 22:51:06 +0200 | [diff] [blame] | 3684 | task_destroy(t); |
Willy Tarreau | 0975f11 | 2018-03-29 15:22:59 +0200 | [diff] [blame] | 3685 | |
| 3686 | if (!h2c) { |
| 3687 | /* resources were already deleted */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3688 | TRACE_DEVEL("leaving (not more h2c)", H2_EV_H2C_WAKE); |
Willy Tarreau | 0975f11 | 2018-03-29 15:22:59 +0200 | [diff] [blame] | 3689 | return NULL; |
| 3690 | } |
| 3691 | |
| 3692 | h2c->task = NULL; |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 3693 | h2c_error(h2c, H2_ERR_NO_ERROR); |
Willy Tarreau | 2348291 | 2019-05-07 15:23:14 +0200 | [diff] [blame] | 3694 | h2_wake_some_streams(h2c, 0); |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 3695 | |
Willy Tarreau | 662fafc | 2019-05-26 09:43:07 +0200 | [diff] [blame] | 3696 | if (br_data(h2c->mbuf)) { |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 3697 | /* don't even try to send a GOAWAY, the buffer is stuck */ |
| 3698 | h2c->flags |= H2_CF_GOAWAY_FAILED; |
| 3699 | } |
| 3700 | |
| 3701 | /* try to send but no need to insist */ |
Willy Tarreau | 599391a | 2017-11-24 10:16:00 +0100 | [diff] [blame] | 3702 | h2c->last_sid = h2c->max_id; |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 3703 | if (h2c_send_goaway_error(h2c, NULL) <= 0) |
| 3704 | h2c->flags |= H2_CF_GOAWAY_FAILED; |
| 3705 | |
Willy Tarreau | 662fafc | 2019-05-26 09:43:07 +0200 | [diff] [blame] | 3706 | if (br_data(h2c->mbuf) && !(h2c->flags & H2_CF_GOAWAY_FAILED) && conn_xprt_ready(h2c->conn)) { |
Willy Tarreau | 41c4d6a | 2019-05-26 09:49:17 +0200 | [diff] [blame] | 3707 | unsigned int released = 0; |
| 3708 | struct buffer *buf; |
| 3709 | |
| 3710 | for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) { |
| 3711 | if (b_data(buf)) { |
| 3712 | int ret = h2c->conn->xprt->snd_buf(h2c->conn, h2c->conn->xprt_ctx, buf, b_data(buf), 0); |
| 3713 | if (!ret) |
| 3714 | break; |
| 3715 | b_del(buf, ret); |
| 3716 | if (b_data(buf)) |
| 3717 | break; |
| 3718 | b_free(buf); |
| 3719 | released++; |
| 3720 | } |
Willy Tarreau | 787db9a | 2018-06-14 18:31:46 +0200 | [diff] [blame] | 3721 | } |
Willy Tarreau | 41c4d6a | 2019-05-26 09:49:17 +0200 | [diff] [blame] | 3722 | |
| 3723 | if (released) |
Willy Tarreau | 201840a | 2019-05-29 17:50:48 +0200 | [diff] [blame] | 3724 | offer_buffers(NULL, tasks_run_queue); |
Willy Tarreau | 787db9a | 2018-06-14 18:31:46 +0200 | [diff] [blame] | 3725 | } |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 3726 | |
Willy Tarreau | 4481e26 | 2019-10-31 15:36:30 +0100 | [diff] [blame] | 3727 | /* in any case this connection must not be considered idle anymore */ |
| 3728 | HA_SPIN_LOCK(OTHER_LOCK, &toremove_lock[tid]); |
| 3729 | MT_LIST_DEL((struct mt_list *)&h2c->conn->list); |
| 3730 | HA_SPIN_UNLOCK(OTHER_LOCK, &toremove_lock[tid]); |
| 3731 | |
Willy Tarreau | 0975f11 | 2018-03-29 15:22:59 +0200 | [diff] [blame] | 3732 | /* either we can release everything now or it will be done later once |
| 3733 | * the last stream closes. |
| 3734 | */ |
| 3735 | if (eb_is_empty(&h2c->streams_by_id)) |
Christopher Faulet | 73c1207 | 2019-04-08 11:23:22 +0200 | [diff] [blame] | 3736 | h2_release(h2c); |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 3737 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3738 | TRACE_LEAVE(H2_EV_H2C_WAKE); |
Willy Tarreau | ea39282 | 2017-10-31 10:02:25 +0100 | [diff] [blame] | 3739 | return NULL; |
| 3740 | } |
| 3741 | |
| 3742 | |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 3743 | /*******************************************/ |
| 3744 | /* functions below are used by the streams */ |
| 3745 | /*******************************************/ |
| 3746 | |
| 3747 | /* |
| 3748 | * Attach a new stream to a connection |
| 3749 | * (Used for outgoing connections) |
| 3750 | */ |
Olivier Houchard | f502aca | 2018-12-14 19:42:40 +0100 | [diff] [blame] | 3751 | static struct conn_stream *h2_attach(struct connection *conn, struct session *sess) |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 3752 | { |
Olivier Houchard | 7a57e8a | 2018-11-27 17:36:33 +0100 | [diff] [blame] | 3753 | struct conn_stream *cs; |
| 3754 | struct h2s *h2s; |
Willy Tarreau | 3d2ee55 | 2018-12-19 14:12:10 +0100 | [diff] [blame] | 3755 | struct h2c *h2c = conn->ctx; |
Olivier Houchard | 7a57e8a | 2018-11-27 17:36:33 +0100 | [diff] [blame] | 3756 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3757 | TRACE_ENTER(H2_EV_H2S_NEW, conn); |
Olivier Houchard | 7a57e8a | 2018-11-27 17:36:33 +0100 | [diff] [blame] | 3758 | cs = cs_new(conn); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3759 | if (!cs) { |
| 3760 | TRACE_DEVEL("leaving on CS allocation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn); |
Olivier Houchard | 7a57e8a | 2018-11-27 17:36:33 +0100 | [diff] [blame] | 3761 | return NULL; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3762 | } |
Olivier Houchard | f502aca | 2018-12-14 19:42:40 +0100 | [diff] [blame] | 3763 | h2s = h2c_bck_stream_new(h2c, cs, sess); |
Olivier Houchard | 7a57e8a | 2018-11-27 17:36:33 +0100 | [diff] [blame] | 3764 | if (!h2s) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3765 | TRACE_DEVEL("leaving on stream creation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn); |
Olivier Houchard | 7a57e8a | 2018-11-27 17:36:33 +0100 | [diff] [blame] | 3766 | cs_free(cs); |
| 3767 | return NULL; |
| 3768 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3769 | TRACE_LEAVE(H2_EV_H2S_NEW, conn, h2s); |
Olivier Houchard | 7a57e8a | 2018-11-27 17:36:33 +0100 | [diff] [blame] | 3770 | return cs; |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 3771 | } |
| 3772 | |
Willy Tarreau | fafd398 | 2018-11-18 21:29:20 +0100 | [diff] [blame] | 3773 | /* Retrieves the first valid conn_stream from this connection, or returns NULL. |
| 3774 | * We have to scan because we may have some orphan streams. It might be |
| 3775 | * beneficial to scan backwards from the end to reduce the likeliness to find |
| 3776 | * orphans. |
| 3777 | */ |
| 3778 | static const struct conn_stream *h2_get_first_cs(const struct connection *conn) |
| 3779 | { |
Willy Tarreau | 3d2ee55 | 2018-12-19 14:12:10 +0100 | [diff] [blame] | 3780 | struct h2c *h2c = conn->ctx; |
Willy Tarreau | fafd398 | 2018-11-18 21:29:20 +0100 | [diff] [blame] | 3781 | struct h2s *h2s; |
| 3782 | struct eb32_node *node; |
| 3783 | |
| 3784 | node = eb32_first(&h2c->streams_by_id); |
| 3785 | while (node) { |
| 3786 | h2s = container_of(node, struct h2s, by_id); |
| 3787 | if (h2s->cs) |
| 3788 | return h2s->cs; |
| 3789 | node = eb32_next(node); |
| 3790 | } |
| 3791 | return NULL; |
| 3792 | } |
| 3793 | |
Olivier Houchard | 9b8e11e | 2019-10-25 16:19:26 +0200 | [diff] [blame] | 3794 | static int h2_ctl(struct connection *conn, enum mux_ctl_type mux_ctl, void *output) |
| 3795 | { |
| 3796 | int ret = 0; |
| 3797 | struct h2c *h2c = conn->ctx; |
| 3798 | |
| 3799 | switch (mux_ctl) { |
| 3800 | case MUX_STATUS: |
| 3801 | /* Only consider the mux to be ready if we're done with |
| 3802 | * the preface and settings, and we had no error. |
| 3803 | */ |
| 3804 | if (h2c->st0 >= H2_CS_FRAME_H && h2c->st0 < H2_CS_ERROR) |
| 3805 | ret |= MUX_STATUS_READY; |
| 3806 | return ret; |
| 3807 | default: |
| 3808 | return -1; |
| 3809 | } |
| 3810 | } |
| 3811 | |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 3812 | /* |
Olivier Houchard | 060ed43 | 2018-11-06 16:32:42 +0100 | [diff] [blame] | 3813 | * Destroy the mux and the associated connection, if it is no longer used |
| 3814 | */ |
Christopher Faulet | 73c1207 | 2019-04-08 11:23:22 +0200 | [diff] [blame] | 3815 | static void h2_destroy(void *ctx) |
Olivier Houchard | 060ed43 | 2018-11-06 16:32:42 +0100 | [diff] [blame] | 3816 | { |
Christopher Faulet | 73c1207 | 2019-04-08 11:23:22 +0200 | [diff] [blame] | 3817 | struct h2c *h2c = ctx; |
Olivier Houchard | 060ed43 | 2018-11-06 16:32:42 +0100 | [diff] [blame] | 3818 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3819 | TRACE_ENTER(H2_EV_H2C_END, h2c->conn); |
Christopher Faulet | 39a96ee | 2019-04-08 10:52:21 +0200 | [diff] [blame] | 3820 | if (eb_is_empty(&h2c->streams_by_id) || !h2c->conn || h2c->conn->ctx != h2c) |
Christopher Faulet | 73c1207 | 2019-04-08 11:23:22 +0200 | [diff] [blame] | 3821 | h2_release(h2c); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3822 | TRACE_LEAVE(H2_EV_H2C_END); |
Olivier Houchard | 060ed43 | 2018-11-06 16:32:42 +0100 | [diff] [blame] | 3823 | } |
| 3824 | |
| 3825 | /* |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 3826 | * Detach the stream from the connection and possibly release the connection. |
| 3827 | */ |
| 3828 | static void h2_detach(struct conn_stream *cs) |
| 3829 | { |
Willy Tarreau | 6093514 | 2017-10-16 18:11:19 +0200 | [diff] [blame] | 3830 | struct h2s *h2s = cs->ctx; |
| 3831 | struct h2c *h2c; |
Olivier Houchard | f502aca | 2018-12-14 19:42:40 +0100 | [diff] [blame] | 3832 | struct session *sess; |
Willy Tarreau | 6093514 | 2017-10-16 18:11:19 +0200 | [diff] [blame] | 3833 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3834 | TRACE_ENTER(H2_EV_STRM_END, h2s ? h2s->h2c->conn : NULL, h2s); |
| 3835 | |
Willy Tarreau | 6093514 | 2017-10-16 18:11:19 +0200 | [diff] [blame] | 3836 | cs->ctx = NULL; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3837 | if (!h2s) { |
| 3838 | TRACE_LEAVE(H2_EV_STRM_END); |
Willy Tarreau | 6093514 | 2017-10-16 18:11:19 +0200 | [diff] [blame] | 3839 | return; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3840 | } |
Willy Tarreau | 6093514 | 2017-10-16 18:11:19 +0200 | [diff] [blame] | 3841 | |
Willy Tarreau | d946416 | 2020-01-10 18:25:07 +0100 | [diff] [blame] | 3842 | /* there's no txbuf so we're certain not to be able to send anything */ |
| 3843 | h2s->flags &= ~H2_SF_NOTIFIED; |
Olivier Houchard | 998410a | 2019-04-15 19:23:37 +0200 | [diff] [blame] | 3844 | |
Olivier Houchard | f502aca | 2018-12-14 19:42:40 +0100 | [diff] [blame] | 3845 | sess = h2s->sess; |
Willy Tarreau | 6093514 | 2017-10-16 18:11:19 +0200 | [diff] [blame] | 3846 | h2c = h2s->h2c; |
| 3847 | h2s->cs = NULL; |
Willy Tarreau | 7ac60e8 | 2018-07-19 09:04:05 +0200 | [diff] [blame] | 3848 | h2c->nb_cs--; |
Willy Tarreau | fa1d357 | 2019-01-31 10:31:51 +0100 | [diff] [blame] | 3849 | if ((h2c->flags & (H2_CF_IS_BACK|H2_CF_DEM_TOOMANY)) == H2_CF_DEM_TOOMANY && |
| 3850 | !h2_frt_has_too_many_cs(h2c)) { |
| 3851 | /* frontend connection was blocking new streams creation */ |
Willy Tarreau | f210191 | 2018-07-19 10:11:38 +0200 | [diff] [blame] | 3852 | h2c->flags &= ~H2_CF_DEM_TOOMANY; |
Olivier Houchard | 3ca18bf | 2019-04-05 15:34:34 +0200 | [diff] [blame] | 3853 | h2c_restart_reading(h2c, 1); |
Willy Tarreau | f210191 | 2018-07-19 10:11:38 +0200 | [diff] [blame] | 3854 | } |
Willy Tarreau | 6093514 | 2017-10-16 18:11:19 +0200 | [diff] [blame] | 3855 | |
Willy Tarreau | 22cf59b | 2017-11-10 11:42:33 +0100 | [diff] [blame] | 3856 | /* this stream may be blocked waiting for some data to leave (possibly |
| 3857 | * an ES or RST frame), so orphan it in this case. |
| 3858 | */ |
Willy Tarreau | 3041fcc | 2018-03-29 15:41:32 +0200 | [diff] [blame] | 3859 | if (!(cs->conn->flags & CO_FL_ERROR) && |
Willy Tarreau | a2b5181 | 2018-07-27 09:55:14 +0200 | [diff] [blame] | 3860 | (h2c->st0 < H2_CS_ERROR) && |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 3861 | (h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL)) && |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 3862 | ((h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) || h2s->subs)) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3863 | TRACE_DEVEL("leaving on stream blocked", H2_EV_STRM_END|H2_EV_H2S_BLK, h2c->conn, h2s); |
Willy Tarreau | 22cf59b | 2017-11-10 11:42:33 +0100 | [diff] [blame] | 3864 | return; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3865 | } |
Willy Tarreau | 22cf59b | 2017-11-10 11:42:33 +0100 | [diff] [blame] | 3866 | |
Willy Tarreau | 45f752e | 2017-10-30 15:44:59 +0100 | [diff] [blame] | 3867 | if ((h2c->flags & H2_CF_DEM_BLOCK_ANY && h2s->id == h2c->dsi) || |
| 3868 | (h2c->flags & H2_CF_MUX_BLOCK_ANY && h2s->id == h2c->msi)) { |
| 3869 | /* unblock the connection if it was blocked on this |
| 3870 | * stream. |
| 3871 | */ |
| 3872 | h2c->flags &= ~H2_CF_DEM_BLOCK_ANY; |
| 3873 | h2c->flags &= ~H2_CF_MUX_BLOCK_ANY; |
Olivier Houchard | 3ca18bf | 2019-04-05 15:34:34 +0200 | [diff] [blame] | 3874 | h2c_restart_reading(h2c, 1); |
Willy Tarreau | 45f752e | 2017-10-30 15:44:59 +0100 | [diff] [blame] | 3875 | } |
| 3876 | |
Willy Tarreau | 71049cc | 2018-03-28 13:56:39 +0200 | [diff] [blame] | 3877 | h2s_destroy(h2s); |
Willy Tarreau | 6093514 | 2017-10-16 18:11:19 +0200 | [diff] [blame] | 3878 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 3879 | if (h2c->flags & H2_CF_IS_BACK) { |
Olivier Houchard | 8a78690 | 2018-12-15 16:05:40 +0100 | [diff] [blame] | 3880 | if (!(h2c->conn->flags & |
| 3881 | (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH))) { |
| 3882 | if (!h2c->conn->owner) { |
Olivier Houchard | f502aca | 2018-12-14 19:42:40 +0100 | [diff] [blame] | 3883 | h2c->conn->owner = sess; |
Olivier Houchard | 351411f | 2018-12-27 17:20:54 +0100 | [diff] [blame] | 3884 | if (!session_add_conn(sess, h2c->conn, h2c->conn->target)) { |
| 3885 | h2c->conn->owner = NULL; |
| 3886 | if (eb_is_empty(&h2c->streams_by_id)) { |
| 3887 | if (!srv_add_to_idle_list(objt_server(h2c->conn->target), h2c->conn)) |
| 3888 | /* The server doesn't want it, let's kill the connection right away */ |
| 3889 | h2c->conn->mux->destroy(h2c->conn); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3890 | TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR); |
Olivier Houchard | 351411f | 2018-12-27 17:20:54 +0100 | [diff] [blame] | 3891 | return; |
| 3892 | } |
| 3893 | } |
Olivier Houchard | 8a78690 | 2018-12-15 16:05:40 +0100 | [diff] [blame] | 3894 | } |
Olivier Houchard | a4d4fdf | 2018-12-14 19:27:06 +0100 | [diff] [blame] | 3895 | if (eb_is_empty(&h2c->streams_by_id)) { |
Christopher Faulet | b2d930e | 2019-09-26 16:15:10 +0200 | [diff] [blame] | 3896 | if (session_check_idle_conn(h2c->conn->owner, h2c->conn) != 0) { |
Olivier Houchard | a4d4fdf | 2018-12-14 19:27:06 +0100 | [diff] [blame] | 3897 | /* At this point either the connection is destroyed, or it's been added to the server idle list, just stop */ |
Willy Tarreau | fe1c908 | 2019-08-30 14:57:17 +0200 | [diff] [blame] | 3898 | TRACE_DEVEL("leaving without reusable idle connection", H2_EV_STRM_END); |
Olivier Houchard | a4d4fdf | 2018-12-14 19:27:06 +0100 | [diff] [blame] | 3899 | return; |
Christopher Faulet | b2d930e | 2019-09-26 16:15:10 +0200 | [diff] [blame] | 3900 | } |
Olivier Houchard | a4d4fdf | 2018-12-14 19:27:06 +0100 | [diff] [blame] | 3901 | } |
Olivier Houchard | 8a78690 | 2018-12-15 16:05:40 +0100 | [diff] [blame] | 3902 | /* Never ever allow to reuse a connection from a non-reuse backend */ |
| 3903 | if ((h2c->proxy->options & PR_O_REUSE_MASK) == PR_O_REUSE_NEVR) |
| 3904 | h2c->conn->flags |= CO_FL_PRIVATE; |
Willy Tarreau | c234ae3 | 2019-05-13 17:56:11 +0200 | [diff] [blame] | 3905 | if (!LIST_ADDED(&h2c->conn->list) && h2c->nb_streams < h2c->streams_limit) { |
Olivier Houchard | 8a78690 | 2018-12-15 16:05:40 +0100 | [diff] [blame] | 3906 | struct server *srv = objt_server(h2c->conn->target); |
| 3907 | |
| 3908 | if (srv) { |
| 3909 | if (h2c->conn->flags & CO_FL_PRIVATE) |
| 3910 | LIST_ADD(&srv->priv_conns[tid], &h2c->conn->list); |
| 3911 | else |
| 3912 | LIST_ADD(&srv->idle_conns[tid], &h2c->conn->list); |
| 3913 | } |
| 3914 | |
| 3915 | } |
| 3916 | } |
| 3917 | } |
| 3918 | |
Willy Tarreau | e323f34 | 2018-03-28 13:51:45 +0200 | [diff] [blame] | 3919 | /* We don't want to close right now unless we're removing the |
| 3920 | * last stream, and either the connection is in error, or it |
| 3921 | * reached the ID already specified in a GOAWAY frame received |
| 3922 | * or sent (as seen by last_sid >= 0). |
| 3923 | */ |
Olivier Houchard | 7a97743 | 2019-03-21 15:47:13 +0100 | [diff] [blame] | 3924 | if (h2c_is_dead(h2c)) { |
Willy Tarreau | e323f34 | 2018-03-28 13:51:45 +0200 | [diff] [blame] | 3925 | /* no more stream will come, kill it now */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3926 | TRACE_DEVEL("leaving and killing dead connection", H2_EV_STRM_END, h2c->conn); |
Christopher Faulet | 73c1207 | 2019-04-08 11:23:22 +0200 | [diff] [blame] | 3927 | h2_release(h2c); |
Willy Tarreau | e323f34 | 2018-03-28 13:51:45 +0200 | [diff] [blame] | 3928 | } |
| 3929 | else if (h2c->task) { |
Willy Tarreau | c2ea47f | 2019-10-01 10:12:00 +0200 | [diff] [blame] | 3930 | if (h2c_may_expire(h2c)) |
| 3931 | h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout); |
| 3932 | else |
| 3933 | h2c->task->expire = TICK_ETERNITY; |
Willy Tarreau | 7348119 | 2019-06-07 08:20:46 +0200 | [diff] [blame] | 3934 | task_queue(h2c->task); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3935 | TRACE_DEVEL("leaving, refreshing connection's timeout", H2_EV_STRM_END, h2c->conn); |
Willy Tarreau | 6093514 | 2017-10-16 18:11:19 +0200 | [diff] [blame] | 3936 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3937 | else |
| 3938 | TRACE_DEVEL("leaving", H2_EV_STRM_END, h2c->conn); |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 3939 | } |
| 3940 | |
Willy Tarreau | 88bdba3 | 2019-05-13 18:17:53 +0200 | [diff] [blame] | 3941 | /* Performs a synchronous or asynchronous shutr(). */ |
| 3942 | static void h2_do_shutr(struct h2s *h2s) |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 3943 | { |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 3944 | struct h2c *h2c = h2s->h2c; |
Willy Tarreau | c7576ea | 2017-10-29 22:00:09 +0100 | [diff] [blame] | 3945 | |
Willy Tarreau | f983d00 | 2019-05-14 10:40:21 +0200 | [diff] [blame] | 3946 | if (h2s->st == H2_SS_CLOSED) |
Willy Tarreau | 88bdba3 | 2019-05-13 18:17:53 +0200 | [diff] [blame] | 3947 | goto done; |
Willy Tarreau | c7576ea | 2017-10-29 22:00:09 +0100 | [diff] [blame] | 3948 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3949 | TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s); |
| 3950 | |
Willy Tarreau | 1805904 | 2019-01-31 19:12:48 +0100 | [diff] [blame] | 3951 | /* a connstream may require us to immediately kill the whole connection |
| 3952 | * for example because of a "tcp-request content reject" rule that is |
| 3953 | * normally used to limit abuse. In this case we schedule a goaway to |
| 3954 | * close the connection. |
Willy Tarreau | 926fa4c | 2017-11-07 14:42:12 +0100 | [diff] [blame] | 3955 | */ |
Willy Tarreau | 3cf69fe | 2019-05-14 10:44:40 +0200 | [diff] [blame] | 3956 | if ((h2s->flags & H2_SF_KILL_CONN) && |
Willy Tarreau | 1805904 | 2019-01-31 19:12:48 +0100 | [diff] [blame] | 3957 | !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3958 | TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s); |
Willy Tarreau | 1805904 | 2019-01-31 19:12:48 +0100 | [diff] [blame] | 3959 | h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM); |
| 3960 | h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM); |
| 3961 | } |
Christopher Faulet | 35757d3 | 2019-03-07 15:51:33 +0100 | [diff] [blame] | 3962 | else if (!(h2s->flags & H2_SF_HEADERS_SENT)) { |
| 3963 | /* Nothing was never sent for this stream, so reset with |
| 3964 | * REFUSED_STREAM error to let the client retry the |
| 3965 | * request. |
| 3966 | */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3967 | TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s); |
Christopher Faulet | 35757d3 | 2019-03-07 15:51:33 +0100 | [diff] [blame] | 3968 | h2s_error(h2s, H2_ERR_REFUSED_STREAM); |
| 3969 | } |
Willy Tarreau | cfba9d6 | 2019-08-06 10:30:58 +0200 | [diff] [blame] | 3970 | else { |
| 3971 | /* a final response was already provided, we don't want this |
| 3972 | * stream anymore. This may happen when the server responds |
| 3973 | * before the end of an upload and closes quickly (redirect, |
| 3974 | * deny, ...) |
| 3975 | */ |
| 3976 | h2s_error(h2s, H2_ERR_CANCEL); |
| 3977 | } |
Willy Tarreau | 1805904 | 2019-01-31 19:12:48 +0100 | [diff] [blame] | 3978 | |
Willy Tarreau | 90c3232 | 2017-11-24 08:00:30 +0100 | [diff] [blame] | 3979 | if (!(h2s->flags & H2_SF_RST_SENT) && |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 3980 | h2s_send_rst_stream(h2c, h2s) <= 0) |
Willy Tarreau | b2e290a | 2018-03-30 17:35:38 +0200 | [diff] [blame] | 3981 | goto add_to_list; |
Willy Tarreau | 90c3232 | 2017-11-24 08:00:30 +0100 | [diff] [blame] | 3982 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 3983 | if (!(h2c->wait_event.events & SUB_RETRY_SEND)) |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 3984 | tasklet_wakeup(h2c->wait_event.tasklet); |
Willy Tarreau | 00dd078 | 2018-03-01 16:31:34 +0100 | [diff] [blame] | 3985 | h2s_close(h2s); |
Willy Tarreau | 88bdba3 | 2019-05-13 18:17:53 +0200 | [diff] [blame] | 3986 | done: |
| 3987 | h2s->flags &= ~H2_SF_WANT_SHUTR; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 3988 | TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s); |
Willy Tarreau | 88bdba3 | 2019-05-13 18:17:53 +0200 | [diff] [blame] | 3989 | return; |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 3990 | add_to_list: |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 3991 | /* Let the handler know we want to shutr, and add ourselves to the |
| 3992 | * most relevant list if not yet done. h2_deferred_shut() will be |
| 3993 | * automatically called via the shut_tl tasklet when there's room |
| 3994 | * again. |
| 3995 | */ |
| 3996 | h2s->flags |= H2_SF_WANT_SHUTR; |
Willy Tarreau | c234ae3 | 2019-05-13 17:56:11 +0200 | [diff] [blame] | 3997 | if (!LIST_ADDED(&h2s->list)) { |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 3998 | if (h2s->flags & H2_SF_BLK_MFCTL) |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 3999 | LIST_ADDQ(&h2c->fctl_list, &h2s->list); |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 4000 | else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM)) |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 4001 | LIST_ADDQ(&h2c->send_list, &h2s->list); |
Willy Tarreau | b2e290a | 2018-03-30 17:35:38 +0200 | [diff] [blame] | 4002 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4003 | TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s); |
Willy Tarreau | 88bdba3 | 2019-05-13 18:17:53 +0200 | [diff] [blame] | 4004 | return; |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 4005 | } |
| 4006 | |
Willy Tarreau | 88bdba3 | 2019-05-13 18:17:53 +0200 | [diff] [blame] | 4007 | /* Performs a synchronous or asynchronous shutw(). */ |
| 4008 | static void h2_do_shutw(struct h2s *h2s) |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 4009 | { |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 4010 | struct h2c *h2c = h2s->h2c; |
Willy Tarreau | c7576ea | 2017-10-29 22:00:09 +0100 | [diff] [blame] | 4011 | |
Willy Tarreau | cfba9d6 | 2019-08-06 10:30:58 +0200 | [diff] [blame] | 4012 | if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_CLOSED) |
Willy Tarreau | 88bdba3 | 2019-05-13 18:17:53 +0200 | [diff] [blame] | 4013 | goto done; |
Willy Tarreau | c7576ea | 2017-10-29 22:00:09 +0100 | [diff] [blame] | 4014 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4015 | TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s); |
| 4016 | |
Willy Tarreau | cfba9d6 | 2019-08-06 10:30:58 +0200 | [diff] [blame] | 4017 | if (h2s->st != H2_SS_ERROR && (h2s->flags & H2_SF_HEADERS_SENT)) { |
Willy Tarreau | 58e3208 | 2017-11-07 14:41:09 +0100 | [diff] [blame] | 4018 | /* we can cleanly close using an empty data frame only after headers */ |
| 4019 | |
| 4020 | if (!(h2s->flags & (H2_SF_ES_SENT|H2_SF_RST_SENT)) && |
| 4021 | h2_send_empty_data_es(h2s) <= 0) |
Willy Tarreau | b2e290a | 2018-03-30 17:35:38 +0200 | [diff] [blame] | 4022 | goto add_to_list; |
Willy Tarreau | 58e3208 | 2017-11-07 14:41:09 +0100 | [diff] [blame] | 4023 | |
| 4024 | if (h2s->st == H2_SS_HREM) |
Willy Tarreau | 00dd078 | 2018-03-01 16:31:34 +0100 | [diff] [blame] | 4025 | h2s_close(h2s); |
Willy Tarreau | 58e3208 | 2017-11-07 14:41:09 +0100 | [diff] [blame] | 4026 | else |
| 4027 | h2s->st = H2_SS_HLOC; |
Willy Tarreau | c7576ea | 2017-10-29 22:00:09 +0100 | [diff] [blame] | 4028 | } else { |
Willy Tarreau | 1805904 | 2019-01-31 19:12:48 +0100 | [diff] [blame] | 4029 | /* a connstream may require us to immediately kill the whole connection |
| 4030 | * for example because of a "tcp-request content reject" rule that is |
| 4031 | * normally used to limit abuse. In this case we schedule a goaway to |
| 4032 | * close the connection. |
Willy Tarreau | a1349f0 | 2017-10-31 07:41:55 +0100 | [diff] [blame] | 4033 | */ |
Willy Tarreau | 3cf69fe | 2019-05-14 10:44:40 +0200 | [diff] [blame] | 4034 | if ((h2s->flags & H2_SF_KILL_CONN) && |
Willy Tarreau | 1805904 | 2019-01-31 19:12:48 +0100 | [diff] [blame] | 4035 | !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4036 | TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s); |
Willy Tarreau | 1805904 | 2019-01-31 19:12:48 +0100 | [diff] [blame] | 4037 | h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM); |
| 4038 | h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM); |
| 4039 | } |
Christopher Faulet | 35757d3 | 2019-03-07 15:51:33 +0100 | [diff] [blame] | 4040 | else { |
| 4041 | /* Nothing was never sent for this stream, so reset with |
| 4042 | * REFUSED_STREAM error to let the client retry the |
| 4043 | * request. |
| 4044 | */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4045 | TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s); |
Christopher Faulet | 35757d3 | 2019-03-07 15:51:33 +0100 | [diff] [blame] | 4046 | h2s_error(h2s, H2_ERR_REFUSED_STREAM); |
| 4047 | } |
Willy Tarreau | 1805904 | 2019-01-31 19:12:48 +0100 | [diff] [blame] | 4048 | |
Willy Tarreau | 90c3232 | 2017-11-24 08:00:30 +0100 | [diff] [blame] | 4049 | if (!(h2s->flags & H2_SF_RST_SENT) && |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 4050 | h2s_send_rst_stream(h2c, h2s) <= 0) |
Willy Tarreau | b2e290a | 2018-03-30 17:35:38 +0200 | [diff] [blame] | 4051 | goto add_to_list; |
Willy Tarreau | 90c3232 | 2017-11-24 08:00:30 +0100 | [diff] [blame] | 4052 | |
Willy Tarreau | 00dd078 | 2018-03-01 16:31:34 +0100 | [diff] [blame] | 4053 | h2s_close(h2s); |
Willy Tarreau | c7576ea | 2017-10-29 22:00:09 +0100 | [diff] [blame] | 4054 | } |
| 4055 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 4056 | if (!(h2c->wait_event.events & SUB_RETRY_SEND)) |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 4057 | tasklet_wakeup(h2c->wait_event.tasklet); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4058 | |
| 4059 | TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s); |
| 4060 | |
Willy Tarreau | 88bdba3 | 2019-05-13 18:17:53 +0200 | [diff] [blame] | 4061 | done: |
| 4062 | h2s->flags &= ~H2_SF_WANT_SHUTW; |
| 4063 | return; |
Willy Tarreau | b2e290a | 2018-03-30 17:35:38 +0200 | [diff] [blame] | 4064 | |
| 4065 | add_to_list: |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 4066 | /* Let the handler know we want to shutw, and add ourselves to the |
| 4067 | * most relevant list if not yet done. h2_deferred_shut() will be |
| 4068 | * automatically called via the shut_tl tasklet when there's room |
| 4069 | * again. |
| 4070 | */ |
| 4071 | h2s->flags |= H2_SF_WANT_SHUTW; |
Willy Tarreau | c234ae3 | 2019-05-13 17:56:11 +0200 | [diff] [blame] | 4072 | if (!LIST_ADDED(&h2s->list)) { |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 4073 | if (h2s->flags & H2_SF_BLK_MFCTL) |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 4074 | LIST_ADDQ(&h2c->fctl_list, &h2s->list); |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 4075 | else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM)) |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 4076 | LIST_ADDQ(&h2c->send_list, &h2s->list); |
Willy Tarreau | b2e290a | 2018-03-30 17:35:38 +0200 | [diff] [blame] | 4077 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4078 | TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s); |
Willy Tarreau | 88bdba3 | 2019-05-13 18:17:53 +0200 | [diff] [blame] | 4079 | return; |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 4080 | } |
| 4081 | |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 4082 | /* This is the tasklet referenced in h2s->shut_tl, it is used for |
Willy Tarreau | 749f5ca | 2019-03-21 19:19:36 +0100 | [diff] [blame] | 4083 | * deferred shutdowns when the h2_detach() was done but the mux buffer was full |
| 4084 | * and prevented the last frame from being emitted. |
| 4085 | */ |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 4086 | static struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned short state) |
| 4087 | { |
| 4088 | struct h2s *h2s = ctx; |
Willy Tarreau | 88bdba3 | 2019-05-13 18:17:53 +0200 | [diff] [blame] | 4089 | struct h2c *h2c = h2s->h2c; |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 4090 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4091 | TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s); |
| 4092 | |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 4093 | if (h2s->flags & H2_SF_NOTIFIED) { |
| 4094 | /* some data processing remains to be done first */ |
| 4095 | goto end; |
| 4096 | } |
| 4097 | |
Willy Tarreau | 2c249eb | 2019-05-13 18:06:17 +0200 | [diff] [blame] | 4098 | if (h2s->flags & H2_SF_WANT_SHUTW) |
Willy Tarreau | 88bdba3 | 2019-05-13 18:17:53 +0200 | [diff] [blame] | 4099 | h2_do_shutw(h2s); |
| 4100 | |
Willy Tarreau | 2c249eb | 2019-05-13 18:06:17 +0200 | [diff] [blame] | 4101 | if (h2s->flags & H2_SF_WANT_SHUTR) |
Willy Tarreau | 88bdba3 | 2019-05-13 18:17:53 +0200 | [diff] [blame] | 4102 | h2_do_shutr(h2s); |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 4103 | |
Willy Tarreau | 88bdba3 | 2019-05-13 18:17:53 +0200 | [diff] [blame] | 4104 | if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) { |
Olivier Houchard | afc7cb8 | 2019-03-25 14:08:01 +0100 | [diff] [blame] | 4105 | /* We're done trying to send, remove ourself from the send_list */ |
Olivier Houchard | afc7cb8 | 2019-03-25 14:08:01 +0100 | [diff] [blame] | 4106 | LIST_DEL_INIT(&h2s->list); |
Olivier Houchard | 7a97743 | 2019-03-21 15:47:13 +0100 | [diff] [blame] | 4107 | |
Willy Tarreau | 88bdba3 | 2019-05-13 18:17:53 +0200 | [diff] [blame] | 4108 | if (!h2s->cs) { |
| 4109 | h2s_destroy(h2s); |
| 4110 | if (h2c_is_dead(h2c)) |
| 4111 | h2_release(h2c); |
| 4112 | } |
Olivier Houchard | 7a97743 | 2019-03-21 15:47:13 +0100 | [diff] [blame] | 4113 | } |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 4114 | end: |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4115 | TRACE_LEAVE(H2_EV_STRM_SHUT); |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 4116 | return NULL; |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 4117 | } |
| 4118 | |
Willy Tarreau | 749f5ca | 2019-03-21 19:19:36 +0100 | [diff] [blame] | 4119 | /* shutr() called by the conn_stream (mux_ops.shutr) */ |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 4120 | static void h2_shutr(struct conn_stream *cs, enum cs_shr_mode mode) |
| 4121 | { |
| 4122 | struct h2s *h2s = cs->ctx; |
| 4123 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4124 | TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s); |
Willy Tarreau | 3cf69fe | 2019-05-14 10:44:40 +0200 | [diff] [blame] | 4125 | if (cs->flags & CS_FL_KILL_CONN) |
| 4126 | h2s->flags |= H2_SF_KILL_CONN; |
| 4127 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4128 | if (mode) |
| 4129 | h2_do_shutr(h2s); |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 4130 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4131 | TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s); |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 4132 | } |
| 4133 | |
Willy Tarreau | 749f5ca | 2019-03-21 19:19:36 +0100 | [diff] [blame] | 4134 | /* shutw() called by the conn_stream (mux_ops.shutw) */ |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 4135 | static void h2_shutw(struct conn_stream *cs, enum cs_shw_mode mode) |
| 4136 | { |
| 4137 | struct h2s *h2s = cs->ctx; |
| 4138 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4139 | TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s); |
Willy Tarreau | 3cf69fe | 2019-05-14 10:44:40 +0200 | [diff] [blame] | 4140 | if (cs->flags & CS_FL_KILL_CONN) |
| 4141 | h2s->flags |= H2_SF_KILL_CONN; |
| 4142 | |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 4143 | h2_do_shutw(h2s); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4144 | TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s); |
Olivier Houchard | 8ae735d | 2018-09-11 18:24:28 +0200 | [diff] [blame] | 4145 | } |
| 4146 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4147 | /* Decode the payload of a HEADERS frame and produce the HTX request or response |
| 4148 | * depending on the connection's side. Returns a positive value on success, a |
| 4149 | * negative value on failure, or 0 if it couldn't proceed. May report connection |
| 4150 | * errors in h2c->errcode if the frame is non-decodable and the connection |
| 4151 | * unrecoverable. In absence of connection error when a failure is reported, the |
| 4152 | * caller must assume a stream error. |
Willy Tarreau | ea18f86 | 2018-12-22 20:19:26 +0100 | [diff] [blame] | 4153 | * |
| 4154 | * The function may fold CONTINUATION frames into the initial HEADERS frame |
| 4155 | * by removing padding and next frame header, then moving the CONTINUATION |
| 4156 | * frame's payload and adjusting h2c->dfl to match the new aggregated frame, |
| 4157 | * leaving a hole between the main frame and the beginning of the next one. |
| 4158 | * The possibly remaining incomplete or next frame at the end may be moved |
| 4159 | * if the aggregated frame is not deleted, in order to fill the hole. Wrapped |
| 4160 | * HEADERS frames are unwrapped into a temporary buffer before decoding. |
| 4161 | * |
| 4162 | * A buffer at the beginning of processing may look like this : |
| 4163 | * |
| 4164 | * ,---.---------.-----.--------------.--------------.------.---. |
| 4165 | * |///| HEADERS | PAD | CONTINUATION | CONTINUATION | DATA |///| |
| 4166 | * `---^---------^-----^--------------^--------------^------^---' |
| 4167 | * | | <-----> | | |
| 4168 | * area | dpl | wrap |
| 4169 | * |<--------------> | |
| 4170 | * | dfl | |
| 4171 | * |<-------------------------------------------------->| |
| 4172 | * head data |
| 4173 | * |
| 4174 | * Padding is automatically overwritten when folding, participating to the |
| 4175 | * hole size after dfl : |
| 4176 | * |
| 4177 | * ,---.------------------------.-----.--------------.------.---. |
| 4178 | * |///| HEADERS : CONTINUATION |/////| CONTINUATION | DATA |///| |
| 4179 | * `---^------------------------^-----^--------------^------^---' |
| 4180 | * | | <-----> | | |
| 4181 | * area | hole | wrap |
| 4182 | * |<-----------------------> | |
| 4183 | * | dfl | |
| 4184 | * |<-------------------------------------------------->| |
| 4185 | * head data |
| 4186 | * |
| 4187 | * Please note that the HEADERS frame is always deprived from its PADLEN byte |
| 4188 | * however it may start with the 5 stream-dep+weight bytes in case of PRIORITY |
| 4189 | * bit. |
Willy Tarreau | 6cc85a5 | 2019-01-02 15:49:20 +0100 | [diff] [blame] | 4190 | * |
| 4191 | * The <flags> field must point to either the stream's flags or to a copy of it |
| 4192 | * so that the function can update the following flags : |
| 4193 | * - H2_SF_DATA_CLEN when content-length is seen |
Willy Tarreau | 6cc85a5 | 2019-01-02 15:49:20 +0100 | [diff] [blame] | 4194 | * - H2_SF_HEADERS_RCVD once the frame is successfully decoded |
Willy Tarreau | 88d138e | 2019-01-02 19:38:14 +0100 | [diff] [blame] | 4195 | * |
| 4196 | * The H2_SF_HEADERS_RCVD flag is also looked at in the <flags> field prior to |
| 4197 | * decoding, in order to detect if we're dealing with a headers or a trailers |
| 4198 | * block (the trailers block appears after H2_SF_HEADERS_RCVD was seen). |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 4199 | */ |
Willy Tarreau | 4790f7c | 2019-01-24 11:33:02 +0100 | [diff] [blame] | 4200 | static int h2c_decode_headers(struct h2c *h2c, struct buffer *rxbuf, uint32_t *flags, unsigned long long *body_len) |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 4201 | { |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 4202 | const uint8_t *hdrs = (uint8_t *)b_head(&h2c->dbuf); |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 4203 | struct buffer *tmp = get_trash_chunk(); |
Christopher Faulet | e4ab11b | 2019-06-11 15:05:37 +0200 | [diff] [blame] | 4204 | struct http_hdr list[global.tune.max_http_hdr * 2]; |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 4205 | struct buffer *copy = NULL; |
Willy Tarreau | 174b06a | 2018-04-25 18:13:58 +0200 | [diff] [blame] | 4206 | unsigned int msgf; |
Willy Tarreau | bd4a6b6 | 2018-11-27 09:29:36 +0100 | [diff] [blame] | 4207 | struct htx *htx = NULL; |
Willy Tarreau | ea18f86 | 2018-12-22 20:19:26 +0100 | [diff] [blame] | 4208 | int flen; // header frame len |
| 4209 | int hole = 0; |
Willy Tarreau | 86277d4 | 2019-01-02 15:36:11 +0100 | [diff] [blame] | 4210 | int ret = 0; |
| 4211 | int outlen; |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 4212 | int wrap; |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 4213 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4214 | TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn); |
| 4215 | |
Willy Tarreau | ea18f86 | 2018-12-22 20:19:26 +0100 | [diff] [blame] | 4216 | next_frame: |
| 4217 | if (b_data(&h2c->dbuf) - hole < h2c->dfl) |
| 4218 | goto leave; // incomplete input frame |
| 4219 | |
| 4220 | /* No END_HEADERS means there's one or more CONTINUATION frames. In |
| 4221 | * this case, we'll try to paste it immediately after the initial |
| 4222 | * HEADERS frame payload and kill any possible padding. The initial |
| 4223 | * frame's length will be increased to represent the concatenation |
| 4224 | * of the two frames. The next frame is read from position <tlen> |
| 4225 | * and written at position <flen> (minus padding if some is present). |
| 4226 | */ |
| 4227 | if (unlikely(!(h2c->dff & H2_F_HEADERS_END_HEADERS))) { |
| 4228 | struct h2_fh hdr; |
| 4229 | int clen; // CONTINUATION frame's payload length |
| 4230 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4231 | TRACE_STATE("EH missing, expecting continuation frame", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_HDR, h2c->conn); |
Willy Tarreau | ea18f86 | 2018-12-22 20:19:26 +0100 | [diff] [blame] | 4232 | if (!h2_peek_frame_hdr(&h2c->dbuf, h2c->dfl + hole, &hdr)) { |
| 4233 | /* no more data, the buffer may be full, either due to |
| 4234 | * too large a frame or because of too large a hole that |
| 4235 | * we're going to compact at the end. |
| 4236 | */ |
| 4237 | goto leave; |
| 4238 | } |
| 4239 | |
| 4240 | if (hdr.ft != H2_FT_CONTINUATION) { |
| 4241 | /* RFC7540#6.10: frame of unexpected type */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4242 | TRACE_STATE("not continuation!", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_HDR|H2_EV_RX_CONT|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | ea18f86 | 2018-12-22 20:19:26 +0100 | [diff] [blame] | 4243 | h2c_error(h2c, H2_ERR_PROTOCOL_ERROR); |
| 4244 | goto fail; |
| 4245 | } |
| 4246 | |
| 4247 | if (hdr.sid != h2c->dsi) { |
| 4248 | /* RFC7540#6.10: frame of different stream */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4249 | TRACE_STATE("different stream ID!", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_HDR|H2_EV_RX_CONT|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | ea18f86 | 2018-12-22 20:19:26 +0100 | [diff] [blame] | 4250 | h2c_error(h2c, H2_ERR_PROTOCOL_ERROR); |
| 4251 | goto fail; |
| 4252 | } |
| 4253 | |
| 4254 | if ((unsigned)hdr.len > (unsigned)global.tune.bufsize) { |
| 4255 | /* RFC7540#4.2: invalid frame length */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4256 | TRACE_STATE("too large frame!", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_HDR|H2_EV_RX_CONT|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | ea18f86 | 2018-12-22 20:19:26 +0100 | [diff] [blame] | 4257 | h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR); |
| 4258 | goto fail; |
| 4259 | } |
| 4260 | |
| 4261 | /* detect when we must stop aggragating frames */ |
| 4262 | h2c->dff |= hdr.ff & H2_F_HEADERS_END_HEADERS; |
| 4263 | |
| 4264 | /* Take as much as we can of the CONTINUATION frame's payload */ |
| 4265 | clen = b_data(&h2c->dbuf) - (h2c->dfl + hole + 9); |
| 4266 | if (clen > hdr.len) |
| 4267 | clen = hdr.len; |
| 4268 | |
| 4269 | /* Move the frame's payload over the padding, hole and frame |
| 4270 | * header. At least one of hole or dpl is null (see diagrams |
| 4271 | * above). The hole moves after the new aggragated frame. |
| 4272 | */ |
| 4273 | b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole + 9), clen, -(h2c->dpl + hole + 9)); |
| 4274 | h2c->dfl += clen - h2c->dpl; |
| 4275 | hole += h2c->dpl + 9; |
| 4276 | h2c->dpl = 0; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4277 | TRACE_STATE("waiting for next continuation frame", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_CONT|H2_EV_RX_HDR, h2c->conn); |
Willy Tarreau | ea18f86 | 2018-12-22 20:19:26 +0100 | [diff] [blame] | 4278 | goto next_frame; |
| 4279 | } |
| 4280 | |
| 4281 | flen = h2c->dfl - h2c->dpl; |
Willy Tarreau | 6847262 | 2017-12-11 18:36:37 +0100 | [diff] [blame] | 4282 | |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 4283 | /* if the input buffer wraps, take a temporary copy of it (rare) */ |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 4284 | wrap = b_wrap(&h2c->dbuf) - b_head(&h2c->dbuf); |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 4285 | if (wrap < h2c->dfl) { |
Willy Tarreau | 68dd985 | 2017-07-03 14:44:26 +0200 | [diff] [blame] | 4286 | copy = alloc_trash_chunk(); |
| 4287 | if (!copy) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4288 | TRACE_DEVEL("failed to allocate temporary buffer", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_ERR, h2c->conn); |
Willy Tarreau | 68dd985 | 2017-07-03 14:44:26 +0200 | [diff] [blame] | 4289 | h2c_error(h2c, H2_ERR_INTERNAL_ERROR); |
| 4290 | goto fail; |
| 4291 | } |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 4292 | memcpy(copy->area, b_head(&h2c->dbuf), wrap); |
| 4293 | memcpy(copy->area + wrap, b_orig(&h2c->dbuf), h2c->dfl - wrap); |
| 4294 | hdrs = (uint8_t *) copy->area; |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 4295 | } |
| 4296 | |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 4297 | /* Skip StreamDep and weight for now (we don't support PRIORITY) */ |
| 4298 | if (h2c->dff & H2_F_HEADERS_PRIORITY) { |
Willy Tarreau | 5c8cafa | 2018-12-23 11:30:42 +0100 | [diff] [blame] | 4299 | if (read_n32(hdrs) == h2c->dsi) { |
Willy Tarreau | 18b86cd | 2017-12-03 19:24:50 +0100 | [diff] [blame] | 4300 | /* RFC7540#5.3.1 : stream dep may not depend on itself */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4301 | TRACE_STATE("invalid stream dependency!", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | 18b86cd | 2017-12-03 19:24:50 +0100 | [diff] [blame] | 4302 | h2c_error(h2c, H2_ERR_PROTOCOL_ERROR); |
Willy Tarreau | a0d11b6 | 2018-09-05 18:30:05 +0200 | [diff] [blame] | 4303 | goto fail; |
Willy Tarreau | 18b86cd | 2017-12-03 19:24:50 +0100 | [diff] [blame] | 4304 | } |
| 4305 | |
Willy Tarreau | a01f45e | 2018-12-31 07:41:24 +0100 | [diff] [blame] | 4306 | if (flen < 5) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4307 | TRACE_STATE("frame too short for priority!", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | a01f45e | 2018-12-31 07:41:24 +0100 | [diff] [blame] | 4308 | h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR); |
| 4309 | goto fail; |
| 4310 | } |
| 4311 | |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 4312 | hdrs += 5; // stream dep = 4, weight = 1 |
| 4313 | flen -= 5; |
| 4314 | } |
| 4315 | |
Willy Tarreau | 5c8cafa | 2018-12-23 11:30:42 +0100 | [diff] [blame] | 4316 | if (!h2_get_buf(h2c, rxbuf)) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4317 | TRACE_STATE("waiting for h2c rxbuf allocation", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_BLK, h2c->conn); |
Willy Tarreau | 937f760 | 2018-02-26 15:22:17 +0100 | [diff] [blame] | 4318 | h2c->flags |= H2_CF_DEM_SALLOC; |
Willy Tarreau | 86277d4 | 2019-01-02 15:36:11 +0100 | [diff] [blame] | 4319 | goto leave; |
Willy Tarreau | 59a10fb | 2017-11-21 20:03:02 +0100 | [diff] [blame] | 4320 | } |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 4321 | |
Willy Tarreau | 937f760 | 2018-02-26 15:22:17 +0100 | [diff] [blame] | 4322 | /* we can't retry a failed decompression operation so we must be very |
| 4323 | * careful not to take any risks. In practice the output buffer is |
| 4324 | * always empty except maybe for trailers, in which case we simply have |
| 4325 | * to wait for the upper layer to finish consuming what is available. |
| 4326 | */ |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4327 | htx = htx_from_buf(rxbuf); |
| 4328 | if (!htx_is_empty(htx)) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4329 | TRACE_STATE("waiting for room in h2c rxbuf", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_BLK, h2c->conn); |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4330 | h2c->flags |= H2_CF_DEM_SFULL; |
| 4331 | goto leave; |
Willy Tarreau | bd4a6b6 | 2018-11-27 09:29:36 +0100 | [diff] [blame] | 4332 | } |
Willy Tarreau | 59a10fb | 2017-11-21 20:03:02 +0100 | [diff] [blame] | 4333 | |
Willy Tarreau | 2591923 | 2019-01-03 14:48:18 +0100 | [diff] [blame] | 4334 | /* past this point we cannot roll back in case of error */ |
Willy Tarreau | 59a10fb | 2017-11-21 20:03:02 +0100 | [diff] [blame] | 4335 | outlen = hpack_decode_frame(h2c->ddht, hdrs, flen, list, |
| 4336 | sizeof(list)/sizeof(list[0]), tmp); |
| 4337 | if (outlen < 0) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4338 | TRACE_STATE("failed to decompress HPACK", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | 59a10fb | 2017-11-21 20:03:02 +0100 | [diff] [blame] | 4339 | h2c_error(h2c, H2_ERR_COMPRESSION_ERROR); |
| 4340 | goto fail; |
| 4341 | } |
| 4342 | |
Willy Tarreau | 2591923 | 2019-01-03 14:48:18 +0100 | [diff] [blame] | 4343 | /* The PACK decompressor was updated, let's update the input buffer and |
| 4344 | * the parser's state to commit these changes and allow us to later |
| 4345 | * fail solely on the stream if needed. |
| 4346 | */ |
| 4347 | b_del(&h2c->dbuf, h2c->dfl + hole); |
| 4348 | h2c->dfl = hole = 0; |
| 4349 | h2c->st0 = H2_CS_FRAME_H; |
| 4350 | |
Willy Tarreau | 59a10fb | 2017-11-21 20:03:02 +0100 | [diff] [blame] | 4351 | /* OK now we have our header list in <list> */ |
Willy Tarreau | 880f580 | 2019-01-03 08:10:14 +0100 | [diff] [blame] | 4352 | msgf = (h2c->dff & H2_F_HEADERS_END_STREAM) ? 0 : H2_MSGF_BODY; |
Willy Tarreau | bd4a6b6 | 2018-11-27 09:29:36 +0100 | [diff] [blame] | 4353 | |
Willy Tarreau | 88d138e | 2019-01-02 19:38:14 +0100 | [diff] [blame] | 4354 | if (*flags & H2_SF_HEADERS_RCVD) |
| 4355 | goto trailers; |
| 4356 | |
| 4357 | /* This is the first HEADERS frame so it's a headers block */ |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4358 | if (h2c->flags & H2_CF_IS_BACK) |
| 4359 | outlen = h2_make_htx_response(list, htx, &msgf, body_len); |
| 4360 | else |
| 4361 | outlen = h2_make_htx_request(list, htx, &msgf, body_len); |
Willy Tarreau | 59a10fb | 2017-11-21 20:03:02 +0100 | [diff] [blame] | 4362 | |
| 4363 | if (outlen < 0) { |
Willy Tarreau | 2591923 | 2019-01-03 14:48:18 +0100 | [diff] [blame] | 4364 | /* too large headers? this is a stream error only */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4365 | TRACE_STATE("request headers too large", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2S_ERR|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | 59a10fb | 2017-11-21 20:03:02 +0100 | [diff] [blame] | 4366 | goto fail; |
| 4367 | } |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 4368 | |
Willy Tarreau | 174b06a | 2018-04-25 18:13:58 +0200 | [diff] [blame] | 4369 | if (msgf & H2_MSGF_BODY) { |
| 4370 | /* a payload is present */ |
Christopher Faulet | eaf0d2a | 2019-02-18 16:04:35 +0100 | [diff] [blame] | 4371 | if (msgf & H2_MSGF_BODY_CL) { |
Willy Tarreau | 5c8cafa | 2018-12-23 11:30:42 +0100 | [diff] [blame] | 4372 | *flags |= H2_SF_DATA_CLEN; |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4373 | htx->extra = *body_len; |
Christopher Faulet | eaf0d2a | 2019-02-18 16:04:35 +0100 | [diff] [blame] | 4374 | } |
Willy Tarreau | 174b06a | 2018-04-25 18:13:58 +0200 | [diff] [blame] | 4375 | } |
| 4376 | |
Willy Tarreau | 88d138e | 2019-01-02 19:38:14 +0100 | [diff] [blame] | 4377 | done: |
Christopher Faulet | 0b46548 | 2019-02-19 15:14:23 +0100 | [diff] [blame] | 4378 | /* indicate that a HEADERS frame was received for this stream, except |
| 4379 | * for 1xx responses. For 1xx responses, another HEADERS frame is |
| 4380 | * expected. |
| 4381 | */ |
| 4382 | if (!(msgf & H2_MSGF_RSP_1XX)) |
| 4383 | *flags |= H2_SF_HEADERS_RCVD; |
Willy Tarreau | 6cc85a5 | 2019-01-02 15:49:20 +0100 | [diff] [blame] | 4384 | |
Christopher Faulet | b75b5ea | 2019-05-17 08:37:28 +0200 | [diff] [blame] | 4385 | if ((h2c->dff & H2_F_HEADERS_END_STREAM)) { |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4386 | /* Mark the end of message using EOM */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4387 | if (!htx_add_endof(htx, HTX_BLK_EOM)) { |
| 4388 | TRACE_STATE("failed to append HTX EOM block into rxbuf", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2S_ERR, h2c->conn); |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4389 | goto fail; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4390 | } |
Willy Tarreau | 88d138e | 2019-01-02 19:38:14 +0100 | [diff] [blame] | 4391 | } |
Willy Tarreau | 937f760 | 2018-02-26 15:22:17 +0100 | [diff] [blame] | 4392 | |
Willy Tarreau | 86277d4 | 2019-01-02 15:36:11 +0100 | [diff] [blame] | 4393 | /* success */ |
| 4394 | ret = 1; |
| 4395 | |
Willy Tarreau | 68dd985 | 2017-07-03 14:44:26 +0200 | [diff] [blame] | 4396 | leave: |
Willy Tarreau | 86277d4 | 2019-01-02 15:36:11 +0100 | [diff] [blame] | 4397 | /* If there is a hole left and it's not at the end, we are forced to |
Willy Tarreau | ea18f86 | 2018-12-22 20:19:26 +0100 | [diff] [blame] | 4398 | * move the remaining data over it. |
| 4399 | */ |
| 4400 | if (hole) { |
| 4401 | if (b_data(&h2c->dbuf) > h2c->dfl + hole) |
| 4402 | b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole), |
| 4403 | b_data(&h2c->dbuf) - (h2c->dfl + hole), -hole); |
| 4404 | b_sub(&h2c->dbuf, hole); |
| 4405 | } |
| 4406 | |
Willy Tarreau | 97215ca | 2019-04-29 10:20:21 +0200 | [diff] [blame] | 4407 | if (b_full(&h2c->dbuf) && h2c->dfl >= b_data(&h2c->dbuf)) { |
Willy Tarreau | ea18f86 | 2018-12-22 20:19:26 +0100 | [diff] [blame] | 4408 | /* too large frames */ |
| 4409 | h2c_error(h2c, H2_ERR_INTERNAL_ERROR); |
Willy Tarreau | 86277d4 | 2019-01-02 15:36:11 +0100 | [diff] [blame] | 4410 | ret = -1; |
Willy Tarreau | ea18f86 | 2018-12-22 20:19:26 +0100 | [diff] [blame] | 4411 | } |
| 4412 | |
Christopher Faulet | 27ba2dc | 2018-12-05 11:53:24 +0100 | [diff] [blame] | 4413 | if (htx) |
Willy Tarreau | 5c8cafa | 2018-12-23 11:30:42 +0100 | [diff] [blame] | 4414 | htx_to_buf(htx, rxbuf); |
Willy Tarreau | 68dd985 | 2017-07-03 14:44:26 +0200 | [diff] [blame] | 4415 | free_trash_chunk(copy); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4416 | TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn); |
Willy Tarreau | 86277d4 | 2019-01-02 15:36:11 +0100 | [diff] [blame] | 4417 | return ret; |
| 4418 | |
Willy Tarreau | 68dd985 | 2017-07-03 14:44:26 +0200 | [diff] [blame] | 4419 | fail: |
Willy Tarreau | 86277d4 | 2019-01-02 15:36:11 +0100 | [diff] [blame] | 4420 | ret = -1; |
Willy Tarreau | 68dd985 | 2017-07-03 14:44:26 +0200 | [diff] [blame] | 4421 | goto leave; |
Willy Tarreau | 88d138e | 2019-01-02 19:38:14 +0100 | [diff] [blame] | 4422 | |
| 4423 | trailers: |
| 4424 | /* This is the last HEADERS frame hence a trailer */ |
Willy Tarreau | 88d138e | 2019-01-02 19:38:14 +0100 | [diff] [blame] | 4425 | if (!(h2c->dff & H2_F_HEADERS_END_STREAM)) { |
| 4426 | /* It's a trailer but it's missing ES flag */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4427 | TRACE_STATE("missing EH on trailers frame", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn); |
Willy Tarreau | 88d138e | 2019-01-02 19:38:14 +0100 | [diff] [blame] | 4428 | h2c_error(h2c, H2_ERR_PROTOCOL_ERROR); |
| 4429 | goto fail; |
| 4430 | } |
| 4431 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4432 | /* Trailers terminate a DATA sequence */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4433 | if (h2_make_htx_trailers(list, htx) <= 0) { |
| 4434 | TRACE_STATE("failed to append HTX trailers into rxbuf", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2S_ERR, h2c->conn); |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4435 | goto fail; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4436 | } |
Willy Tarreau | 88d138e | 2019-01-02 19:38:14 +0100 | [diff] [blame] | 4437 | goto done; |
Willy Tarreau | 13278b4 | 2017-10-13 19:23:14 +0200 | [diff] [blame] | 4438 | } |
| 4439 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4440 | /* Transfer the payload of a DATA frame to the HTTP/1 side. The HTTP/2 frame |
Willy Tarreau | 61ea7dc | 2018-12-01 23:23:04 +0100 | [diff] [blame] | 4441 | * parser state is automatically updated. Returns > 0 if it could completely |
| 4442 | * send the current frame, 0 if it couldn't complete, in which case |
| 4443 | * CS_FL_RCV_MORE must be checked to know if some data remain pending (an empty |
| 4444 | * DATA frame can return 0 as a valid result). Stream errors are reported in |
| 4445 | * h2s->errcode and connection errors in h2c->errcode. The caller must already |
| 4446 | * have checked the frame header and ensured that the frame was complete or the |
| 4447 | * buffer full. It changes the frame state to FRAME_A once done. |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 4448 | */ |
Willy Tarreau | 454b57b | 2018-02-26 15:50:05 +0100 | [diff] [blame] | 4449 | static int h2_frt_transfer_data(struct h2s *h2s) |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 4450 | { |
| 4451 | struct h2c *h2c = h2s->h2c; |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4452 | int block; |
Willy Tarreau | d755ea6 | 2018-02-26 15:44:54 +0100 | [diff] [blame] | 4453 | unsigned int flen = 0; |
Willy Tarreau | 61ea7dc | 2018-12-01 23:23:04 +0100 | [diff] [blame] | 4454 | struct htx *htx = NULL; |
Willy Tarreau | d755ea6 | 2018-02-26 15:44:54 +0100 | [diff] [blame] | 4455 | struct buffer *csbuf; |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4456 | unsigned int sent; |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 4457 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4458 | TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s); |
| 4459 | |
Willy Tarreau | 8fc016d | 2017-12-11 18:27:15 +0100 | [diff] [blame] | 4460 | h2c->flags &= ~H2_CF_DEM_SFULL; |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 4461 | |
Olivier Houchard | 638b799 | 2018-08-16 15:41:52 +0200 | [diff] [blame] | 4462 | csbuf = h2_get_buf(h2c, &h2s->rxbuf); |
Willy Tarreau | d755ea6 | 2018-02-26 15:44:54 +0100 | [diff] [blame] | 4463 | if (!csbuf) { |
| 4464 | h2c->flags |= H2_CF_DEM_SALLOC; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4465 | TRACE_STATE("waiting for an h2s rxbuf", H2_EV_RX_FRAME|H2_EV_RX_DATA|H2_EV_H2S_BLK, h2c->conn, h2s); |
Willy Tarreau | 454b57b | 2018-02-26 15:50:05 +0100 | [diff] [blame] | 4466 | goto fail; |
Willy Tarreau | d755ea6 | 2018-02-26 15:44:54 +0100 | [diff] [blame] | 4467 | } |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4468 | htx = htx_from_buf(csbuf); |
Willy Tarreau | d755ea6 | 2018-02-26 15:44:54 +0100 | [diff] [blame] | 4469 | |
Willy Tarreau | 61ea7dc | 2018-12-01 23:23:04 +0100 | [diff] [blame] | 4470 | try_again: |
Willy Tarreau | 8fc016d | 2017-12-11 18:27:15 +0100 | [diff] [blame] | 4471 | flen = h2c->dfl - h2c->dpl; |
| 4472 | if (!flen) |
Willy Tarreau | 4a28da1 | 2018-01-04 14:41:00 +0100 | [diff] [blame] | 4473 | goto end_transfer; |
Willy Tarreau | 8fc016d | 2017-12-11 18:27:15 +0100 | [diff] [blame] | 4474 | |
Willy Tarreau | c9fa048 | 2018-07-10 17:43:27 +0200 | [diff] [blame] | 4475 | if (flen > b_data(&h2c->dbuf)) { |
| 4476 | flen = b_data(&h2c->dbuf); |
Willy Tarreau | 8fc016d | 2017-12-11 18:27:15 +0100 | [diff] [blame] | 4477 | if (!flen) |
Willy Tarreau | 454b57b | 2018-02-26 15:50:05 +0100 | [diff] [blame] | 4478 | goto fail; |
Willy Tarreau | d755ea6 | 2018-02-26 15:44:54 +0100 | [diff] [blame] | 4479 | } |
| 4480 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4481 | block = htx_free_data_space(htx); |
| 4482 | if (!block) { |
| 4483 | h2c->flags |= H2_CF_DEM_SFULL; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4484 | TRACE_STATE("h2s rxbuf is full", H2_EV_RX_FRAME|H2_EV_RX_DATA|H2_EV_H2S_BLK, h2c->conn, h2s); |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4485 | goto fail; |
Willy Tarreau | eba10f2 | 2018-04-25 20:44:22 +0200 | [diff] [blame] | 4486 | } |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4487 | if (flen > block) |
| 4488 | flen = block; |
Willy Tarreau | eba10f2 | 2018-04-25 20:44:22 +0200 | [diff] [blame] | 4489 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4490 | /* here, flen is the max we can copy into the output buffer */ |
| 4491 | block = b_contig_data(&h2c->dbuf, 0); |
| 4492 | if (flen > block) |
| 4493 | flen = block; |
Willy Tarreau | eba10f2 | 2018-04-25 20:44:22 +0200 | [diff] [blame] | 4494 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4495 | sent = htx_add_data(htx, ist2(b_head(&h2c->dbuf), flen)); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4496 | TRACE_DATA("move some data to h2s rxbuf", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s,, (void *)(long)sent); |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 4497 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4498 | b_del(&h2c->dbuf, sent); |
| 4499 | h2c->dfl -= sent; |
| 4500 | h2c->rcvd_c += sent; |
| 4501 | h2c->rcvd_s += sent; // warning, this can also affect the closed streams! |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 4502 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4503 | if (h2s->flags & H2_SF_DATA_CLEN) { |
| 4504 | h2s->body_len -= sent; |
| 4505 | htx->extra = h2s->body_len; |
Willy Tarreau | eba10f2 | 2018-04-25 20:44:22 +0200 | [diff] [blame] | 4506 | } |
| 4507 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4508 | if (sent < flen) { |
Willy Tarreau | d755ea6 | 2018-02-26 15:44:54 +0100 | [diff] [blame] | 4509 | h2c->flags |= H2_CF_DEM_SFULL; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4510 | TRACE_STATE("h2s rxbuf is full", H2_EV_RX_FRAME|H2_EV_RX_DATA|H2_EV_H2S_BLK, h2c->conn, h2s); |
Willy Tarreau | 454b57b | 2018-02-26 15:50:05 +0100 | [diff] [blame] | 4511 | goto fail; |
Willy Tarreau | 8fc016d | 2017-12-11 18:27:15 +0100 | [diff] [blame] | 4512 | } |
| 4513 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4514 | goto try_again; |
| 4515 | |
Willy Tarreau | 4a28da1 | 2018-01-04 14:41:00 +0100 | [diff] [blame] | 4516 | end_transfer: |
Willy Tarreau | 8fc016d | 2017-12-11 18:27:15 +0100 | [diff] [blame] | 4517 | /* here we're done with the frame, all the payload (except padding) was |
| 4518 | * transferred. |
| 4519 | */ |
Willy Tarreau | eba10f2 | 2018-04-25 20:44:22 +0200 | [diff] [blame] | 4520 | |
Willy Tarreau | 61ea7dc | 2018-12-01 23:23:04 +0100 | [diff] [blame] | 4521 | if (h2c->dff & H2_F_DATA_END_STREAM) { |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4522 | if (!htx_add_endof(htx, HTX_BLK_EOM)) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4523 | TRACE_STATE("h2s rxbuf is full, failed to add EOM", H2_EV_RX_FRAME|H2_EV_RX_DATA|H2_EV_H2S_BLK, h2c->conn, h2s); |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4524 | h2c->flags |= H2_CF_DEM_SFULL; |
| 4525 | goto fail; |
Willy Tarreau | 61ea7dc | 2018-12-01 23:23:04 +0100 | [diff] [blame] | 4526 | } |
Willy Tarreau | eba10f2 | 2018-04-25 20:44:22 +0200 | [diff] [blame] | 4527 | } |
| 4528 | |
Willy Tarreau | d1023bb | 2018-03-22 16:53:12 +0100 | [diff] [blame] | 4529 | h2c->rcvd_c += h2c->dpl; |
| 4530 | h2c->rcvd_s += h2c->dpl; |
| 4531 | h2c->dpl = 0; |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 4532 | h2c->st0 = H2_CS_FRAME_A; // send the corresponding window update |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4533 | htx_to_buf(htx, csbuf); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4534 | TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s); |
Willy Tarreau | 61ea7dc | 2018-12-01 23:23:04 +0100 | [diff] [blame] | 4535 | return 1; |
Willy Tarreau | 454b57b | 2018-02-26 15:50:05 +0100 | [diff] [blame] | 4536 | fail: |
Christopher Faulet | 27ba2dc | 2018-12-05 11:53:24 +0100 | [diff] [blame] | 4537 | if (htx) |
| 4538 | htx_to_buf(htx, csbuf); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4539 | TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s); |
Willy Tarreau | 454b57b | 2018-02-26 15:50:05 +0100 | [diff] [blame] | 4540 | return 0; |
Willy Tarreau | 454f905 | 2017-10-26 19:40:35 +0200 | [diff] [blame] | 4541 | } |
| 4542 | |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4543 | /* Try to send a HEADERS frame matching HTX response present in HTX message |
| 4544 | * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller |
| 4545 | * must check the stream's status to detect any error which might have happened |
| 4546 | * subsequently to a successful send. The htx blocks are automatically removed |
| 4547 | * from the message. The htx message is assumed to be valid since produced from |
| 4548 | * the internal code, hence it contains a start line, an optional series of |
| 4549 | * header blocks and an end of header, otherwise an invalid frame could be |
| 4550 | * emitted and the resulting htx message could be left in an inconsistent state. |
| 4551 | */ |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4552 | static size_t h2s_frt_make_resp_headers(struct h2s *h2s, struct htx *htx) |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4553 | { |
Christopher Faulet | e4ab11b | 2019-06-11 15:05:37 +0200 | [diff] [blame] | 4554 | struct http_hdr list[global.tune.max_http_hdr]; |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4555 | struct h2c *h2c = h2s->h2c; |
| 4556 | struct htx_blk *blk; |
| 4557 | struct htx_blk *blk_end; |
| 4558 | struct buffer outbuf; |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 4559 | struct buffer *mbuf; |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4560 | struct htx_sl *sl; |
| 4561 | enum htx_blk_type type; |
| 4562 | int es_now = 0; |
| 4563 | int ret = 0; |
| 4564 | int hdr; |
| 4565 | int idx; |
| 4566 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4567 | TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s); |
| 4568 | |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4569 | if (h2c_mux_busy(h2c, h2s)) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4570 | TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s); |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4571 | h2s->flags |= H2_SF_BLK_MBUSY; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4572 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s); |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4573 | return 0; |
| 4574 | } |
| 4575 | |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4576 | /* determine the first block which must not be deleted, blk_end may |
| 4577 | * be NULL if all blocks have to be deleted. |
| 4578 | */ |
| 4579 | idx = htx_get_head(htx); |
| 4580 | blk_end = NULL; |
| 4581 | while (idx != -1) { |
| 4582 | type = htx_get_blk_type(htx_get_blk(htx, idx)); |
| 4583 | idx = htx_get_next(htx, idx); |
| 4584 | if (type == HTX_BLK_EOH) { |
| 4585 | if (idx != -1) |
| 4586 | blk_end = htx_get_blk(htx, idx); |
| 4587 | break; |
| 4588 | } |
| 4589 | } |
| 4590 | |
| 4591 | /* get the start line, we do have one */ |
Christopher Faulet | b77a1d2 | 2019-05-13 11:55:10 +0200 | [diff] [blame] | 4592 | blk = htx_get_head_blk(htx); |
Christopher Faulet | ea00973 | 2019-11-18 15:50:25 +0100 | [diff] [blame] | 4593 | BUG_ON(!blk || htx_get_blk_type(blk) != HTX_BLK_RES_SL); |
Christopher Faulet | b77a1d2 | 2019-05-13 11:55:10 +0200 | [diff] [blame] | 4594 | ALREADY_CHECKED(blk); |
| 4595 | sl = htx_get_blk_ptr(htx, blk); |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4596 | h2s->status = sl->info.res.status; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4597 | if (h2s->status < 100 || h2s->status > 999) { |
| 4598 | TRACE_PROTO("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s); |
Willy Tarreau | aafdf58 | 2018-12-10 18:06:40 +0100 | [diff] [blame] | 4599 | goto fail; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4600 | } |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4601 | |
| 4602 | /* and the rest of the headers, that we dump starting at header 0 */ |
| 4603 | hdr = 0; |
| 4604 | |
Willy Tarreau | 8e162ee | 2018-12-06 14:07:27 +0100 | [diff] [blame] | 4605 | idx = htx_get_head(htx); // returns the SL that we skip |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4606 | while ((idx = htx_get_next(htx, idx)) != -1) { |
| 4607 | blk = htx_get_blk(htx, idx); |
| 4608 | type = htx_get_blk_type(blk); |
| 4609 | |
| 4610 | if (type == HTX_BLK_UNUSED) |
| 4611 | continue; |
| 4612 | |
| 4613 | if (type != HTX_BLK_HDR) |
| 4614 | break; |
| 4615 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4616 | if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) { |
| 4617 | TRACE_PROTO("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s); |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4618 | goto fail; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4619 | } |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4620 | |
| 4621 | list[hdr].n = htx_get_blk_name(htx, blk); |
| 4622 | list[hdr].v = htx_get_blk_value(htx, blk); |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4623 | hdr++; |
| 4624 | } |
| 4625 | |
| 4626 | /* marker for end of headers */ |
| 4627 | list[hdr].n = ist(""); |
| 4628 | |
| 4629 | if (h2s->status == 204 || h2s->status == 304) { |
| 4630 | /* no contents, claim c-len is present and set to zero */ |
| 4631 | es_now = 1; |
| 4632 | } |
| 4633 | |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 4634 | mbuf = br_tail(h2c->mbuf); |
| 4635 | retry: |
| 4636 | if (!h2_get_buf(h2c, mbuf)) { |
| 4637 | h2c->flags |= H2_CF_MUX_MALLOC; |
| 4638 | h2s->flags |= H2_SF_BLK_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4639 | TRACE_STATE("waiting for room in output buffer", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_BLK, h2c->conn, h2s); |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 4640 | return 0; |
| 4641 | } |
| 4642 | |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4643 | chunk_reset(&outbuf); |
| 4644 | |
| 4645 | while (1) { |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 4646 | outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0); |
| 4647 | if (outbuf.size >= 9 || !b_space_wraps(mbuf)) |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4648 | break; |
| 4649 | realign_again: |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 4650 | b_slow_realign(mbuf, trash.area, b_data(mbuf)); |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4651 | } |
| 4652 | |
| 4653 | if (outbuf.size < 9) |
| 4654 | goto full; |
| 4655 | |
| 4656 | /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */ |
| 4657 | memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5); |
| 4658 | write_n32(outbuf.area + 5, h2s->id); // 4 bytes |
| 4659 | outbuf.data = 9; |
| 4660 | |
| 4661 | /* encode status, which necessarily is the first one */ |
Willy Tarreau | aafdf58 | 2018-12-10 18:06:40 +0100 | [diff] [blame] | 4662 | if (!hpack_encode_int_status(&outbuf, h2s->status)) { |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 4663 | if (b_space_wraps(mbuf)) |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4664 | goto realign_again; |
| 4665 | goto full; |
| 4666 | } |
| 4667 | |
| 4668 | /* encode all headers, stop at empty name */ |
| 4669 | for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) { |
| 4670 | /* these ones do not exist in H2 and must be dropped. */ |
| 4671 | if (isteq(list[hdr].n, ist("connection")) || |
| 4672 | isteq(list[hdr].n, ist("proxy-connection")) || |
| 4673 | isteq(list[hdr].n, ist("keep-alive")) || |
| 4674 | isteq(list[hdr].n, ist("upgrade")) || |
| 4675 | isteq(list[hdr].n, ist("transfer-encoding"))) |
| 4676 | continue; |
| 4677 | |
Christopher Faulet | 86d144c | 2019-08-14 16:32:25 +0200 | [diff] [blame] | 4678 | /* Skip all pseudo-headers */ |
| 4679 | if (*(list[hdr].n.ptr) == ':') |
| 4680 | continue; |
| 4681 | |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4682 | if (isteq(list[hdr].n, ist(""))) |
| 4683 | break; // end |
| 4684 | |
| 4685 | if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) { |
| 4686 | /* output full */ |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 4687 | if (b_space_wraps(mbuf)) |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4688 | goto realign_again; |
| 4689 | goto full; |
| 4690 | } |
| 4691 | } |
| 4692 | |
Willy Tarreau | cb985a4 | 2019-10-07 16:56:34 +0200 | [diff] [blame] | 4693 | /* update the frame's size */ |
| 4694 | h2_set_frame_size(outbuf.area, outbuf.data - 9); |
| 4695 | |
| 4696 | if (outbuf.data > h2c->mfs + 9) { |
| 4697 | if (!h2_fragment_headers(&outbuf, h2c->mfs)) { |
| 4698 | /* output full */ |
| 4699 | if (b_space_wraps(mbuf)) |
| 4700 | goto realign_again; |
| 4701 | goto full; |
| 4702 | } |
| 4703 | } |
| 4704 | |
Christopher Faulet | 0b46548 | 2019-02-19 15:14:23 +0100 | [diff] [blame] | 4705 | /* we may need to add END_STREAM except for 1xx responses. |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4706 | * FIXME: we should also set it when we know for sure that the |
| 4707 | * content-length is zero as well as on 204/304 |
| 4708 | */ |
Christopher Faulet | 0b46548 | 2019-02-19 15:14:23 +0100 | [diff] [blame] | 4709 | if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM && |
| 4710 | (h2s->status >= 200 || h2s->status == 101)) |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4711 | es_now = 1; |
| 4712 | |
Willy Tarreau | 927b88b | 2019-03-04 08:03:25 +0100 | [diff] [blame] | 4713 | if (!h2s->cs || h2s->cs->flags & CS_FL_SHW) |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4714 | es_now = 1; |
| 4715 | |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4716 | if (es_now) |
| 4717 | outbuf.area[4] |= H2_F_HEADERS_END_STREAM; |
| 4718 | |
| 4719 | /* commit the H2 response */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4720 | TRACE_USER("sent H2 response", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx); |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 4721 | b_add(mbuf, outbuf.data); |
Christopher Faulet | 0b46548 | 2019-02-19 15:14:23 +0100 | [diff] [blame] | 4722 | |
| 4723 | /* indicates the HEADERS frame was sent, except for 1xx responses. For |
| 4724 | * 1xx responses, another HEADERS frame is expected. |
| 4725 | */ |
| 4726 | if (h2s->status >= 200 || h2s->status == 101) |
| 4727 | h2s->flags |= H2_SF_HEADERS_SENT; |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4728 | |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4729 | if (es_now) { |
| 4730 | h2s->flags |= H2_SF_ES_SENT; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4731 | TRACE_PROTO("setting ES on HEADERS frame", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx); |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4732 | if (h2s->st == H2_SS_OPEN) |
| 4733 | h2s->st = H2_SS_HLOC; |
| 4734 | else |
| 4735 | h2s_close(h2s); |
| 4736 | } |
| 4737 | |
| 4738 | /* OK we could properly deliver the response */ |
| 4739 | |
| 4740 | /* remove all header blocks including the EOH and compute the |
| 4741 | * corresponding size. |
| 4742 | * |
| 4743 | * FIXME: We should remove everything when es_now is set. |
| 4744 | */ |
| 4745 | ret = 0; |
| 4746 | idx = htx_get_head(htx); |
| 4747 | blk = htx_get_blk(htx, idx); |
| 4748 | while (blk != blk_end) { |
| 4749 | ret += htx_get_blksz(blk); |
| 4750 | blk = htx_remove_blk(htx, blk); |
| 4751 | } |
Willy Tarreau | c5753ae | 2018-12-02 12:28:01 +0100 | [diff] [blame] | 4752 | |
Christopher Faulet | 316934d | 2019-05-15 14:22:48 +0200 | [diff] [blame] | 4753 | if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) { |
| 4754 | ret += htx_get_blksz(blk_end); |
Willy Tarreau | c5753ae | 2018-12-02 12:28:01 +0100 | [diff] [blame] | 4755 | htx_remove_blk(htx, blk_end); |
Christopher Faulet | 316934d | 2019-05-15 14:22:48 +0200 | [diff] [blame] | 4756 | } |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4757 | end: |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4758 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s); |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4759 | return ret; |
| 4760 | full: |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 4761 | if ((mbuf = br_tail_add(h2c->mbuf)) != NULL) |
| 4762 | goto retry; |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4763 | h2c->flags |= H2_CF_MUX_MFULL; |
| 4764 | h2s->flags |= H2_SF_BLK_MROOM; |
| 4765 | ret = 0; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4766 | TRACE_STATE("mux buffer full", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_BLK, h2c->conn, h2s); |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 4767 | goto end; |
| 4768 | fail: |
| 4769 | /* unparsable HTX messages, too large ones to be produced in the local |
| 4770 | * list etc go here (unrecoverable errors). |
| 4771 | */ |
| 4772 | h2s_error(h2s, H2_ERR_INTERNAL_ERROR); |
| 4773 | ret = 0; |
| 4774 | goto end; |
| 4775 | } |
| 4776 | |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4777 | /* Try to send a HEADERS frame matching HTX request present in HTX message |
| 4778 | * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller |
| 4779 | * must check the stream's status to detect any error which might have happened |
| 4780 | * subsequently to a successful send. The htx blocks are automatically removed |
| 4781 | * from the message. The htx message is assumed to be valid since produced from |
| 4782 | * the internal code, hence it contains a start line, an optional series of |
| 4783 | * header blocks and an end of header, otherwise an invalid frame could be |
| 4784 | * emitted and the resulting htx message could be left in an inconsistent state. |
| 4785 | */ |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 4786 | static size_t h2s_bck_make_req_headers(struct h2s *h2s, struct htx *htx) |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4787 | { |
Christopher Faulet | e4ab11b | 2019-06-11 15:05:37 +0200 | [diff] [blame] | 4788 | struct http_hdr list[global.tune.max_http_hdr]; |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4789 | struct h2c *h2c = h2s->h2c; |
| 4790 | struct htx_blk *blk; |
| 4791 | struct htx_blk *blk_end; |
| 4792 | struct buffer outbuf; |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 4793 | struct buffer *mbuf; |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4794 | struct htx_sl *sl; |
Willy Tarreau | b8ce890 | 2019-10-08 18:16:18 +0200 | [diff] [blame] | 4795 | struct ist meth, uri, auth; |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4796 | enum htx_blk_type type; |
| 4797 | int es_now = 0; |
| 4798 | int ret = 0; |
| 4799 | int hdr; |
| 4800 | int idx; |
| 4801 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4802 | TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s); |
| 4803 | |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4804 | if (h2c_mux_busy(h2c, h2s)) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4805 | TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s); |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4806 | h2s->flags |= H2_SF_BLK_MBUSY; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4807 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s); |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4808 | return 0; |
| 4809 | } |
| 4810 | |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4811 | /* determine the first block which must not be deleted, blk_end may |
| 4812 | * be NULL if all blocks have to be deleted. |
| 4813 | */ |
| 4814 | idx = htx_get_head(htx); |
| 4815 | blk_end = NULL; |
| 4816 | while (idx != -1) { |
| 4817 | type = htx_get_blk_type(htx_get_blk(htx, idx)); |
| 4818 | idx = htx_get_next(htx, idx); |
| 4819 | if (type == HTX_BLK_EOH) { |
| 4820 | if (idx != -1) |
| 4821 | blk_end = htx_get_blk(htx, idx); |
| 4822 | break; |
| 4823 | } |
| 4824 | } |
| 4825 | |
| 4826 | /* get the start line, we do have one */ |
Christopher Faulet | b77a1d2 | 2019-05-13 11:55:10 +0200 | [diff] [blame] | 4827 | blk = htx_get_head_blk(htx); |
Christopher Faulet | ea00973 | 2019-11-18 15:50:25 +0100 | [diff] [blame] | 4828 | BUG_ON(!blk || htx_get_blk_type(blk) != HTX_BLK_REQ_SL); |
Christopher Faulet | b77a1d2 | 2019-05-13 11:55:10 +0200 | [diff] [blame] | 4829 | ALREADY_CHECKED(blk); |
| 4830 | sl = htx_get_blk_ptr(htx, blk); |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4831 | meth = htx_sl_req_meth(sl); |
Willy Tarreau | b8ce890 | 2019-10-08 18:16:18 +0200 | [diff] [blame] | 4832 | uri = htx_sl_req_uri(sl); |
| 4833 | if (unlikely(uri.len == 0)) { |
| 4834 | TRACE_PROTO("no URI in HTX request", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s); |
| 4835 | goto fail; |
| 4836 | } |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4837 | |
| 4838 | /* and the rest of the headers, that we dump starting at header 0 */ |
| 4839 | hdr = 0; |
| 4840 | |
Willy Tarreau | 8e162ee | 2018-12-06 14:07:27 +0100 | [diff] [blame] | 4841 | idx = htx_get_head(htx); // returns the SL that we skip |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4842 | while ((idx = htx_get_next(htx, idx)) != -1) { |
| 4843 | blk = htx_get_blk(htx, idx); |
| 4844 | type = htx_get_blk_type(blk); |
| 4845 | |
| 4846 | if (type == HTX_BLK_UNUSED) |
| 4847 | continue; |
| 4848 | |
| 4849 | if (type != HTX_BLK_HDR) |
| 4850 | break; |
| 4851 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4852 | if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) { |
| 4853 | TRACE_PROTO("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s); |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4854 | goto fail; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4855 | } |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4856 | |
| 4857 | list[hdr].n = htx_get_blk_name(htx, blk); |
| 4858 | list[hdr].v = htx_get_blk_value(htx, blk); |
Christopher Faulet | 67d5809 | 2019-10-02 10:51:38 +0200 | [diff] [blame] | 4859 | |
| 4860 | /* Skip header if same name is used to add the server name */ |
| 4861 | if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name && |
| 4862 | isteq(list[hdr].n, ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len))) |
| 4863 | continue; |
| 4864 | |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4865 | hdr++; |
| 4866 | } |
| 4867 | |
Christopher Faulet | 72ba6cd | 2019-09-24 16:20:05 +0200 | [diff] [blame] | 4868 | /* Now add the server name to a header (if requested) */ |
| 4869 | if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name) { |
| 4870 | struct server *srv = objt_server(h2c->conn->target); |
| 4871 | |
| 4872 | if (srv) { |
| 4873 | list[hdr].n = ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len); |
| 4874 | list[hdr].v = ist(srv->id); |
| 4875 | hdr++; |
| 4876 | } |
| 4877 | } |
| 4878 | |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4879 | /* marker for end of headers */ |
| 4880 | list[hdr].n = ist(""); |
| 4881 | |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 4882 | mbuf = br_tail(h2c->mbuf); |
| 4883 | retry: |
| 4884 | if (!h2_get_buf(h2c, mbuf)) { |
| 4885 | h2c->flags |= H2_CF_MUX_MALLOC; |
| 4886 | h2s->flags |= H2_SF_BLK_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 4887 | TRACE_STATE("waiting for room in output buffer", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_BLK, h2c->conn, h2s); |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 4888 | return 0; |
| 4889 | } |
| 4890 | |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4891 | chunk_reset(&outbuf); |
| 4892 | |
| 4893 | while (1) { |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 4894 | outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0); |
| 4895 | if (outbuf.size >= 9 || !b_space_wraps(mbuf)) |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4896 | break; |
| 4897 | realign_again: |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 4898 | b_slow_realign(mbuf, trash.area, b_data(mbuf)); |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4899 | } |
| 4900 | |
| 4901 | if (outbuf.size < 9) |
| 4902 | goto full; |
| 4903 | |
| 4904 | /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */ |
| 4905 | memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5); |
| 4906 | write_n32(outbuf.area + 5, h2s->id); // 4 bytes |
| 4907 | outbuf.data = 9; |
| 4908 | |
| 4909 | /* encode the method, which necessarily is the first one */ |
Willy Tarreau | bdabc3a | 2018-12-10 18:25:11 +0100 | [diff] [blame] | 4910 | if (!hpack_encode_method(&outbuf, sl->info.req.meth, meth)) { |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 4911 | if (b_space_wraps(mbuf)) |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4912 | goto realign_again; |
| 4913 | goto full; |
| 4914 | } |
| 4915 | |
Willy Tarreau | b8ce890 | 2019-10-08 18:16:18 +0200 | [diff] [blame] | 4916 | auth = ist(NULL); |
| 4917 | |
Willy Tarreau | 5be92ff | 2019-02-01 15:51:59 +0100 | [diff] [blame] | 4918 | /* RFC7540 #8.3: the CONNECT method must have : |
| 4919 | * - :authority set to the URI part (host:port) |
| 4920 | * - :method set to CONNECT |
| 4921 | * - :scheme and :path omitted |
| 4922 | */ |
Willy Tarreau | b8ce890 | 2019-10-08 18:16:18 +0200 | [diff] [blame] | 4923 | if (unlikely(sl->info.req.meth == HTTP_METH_CONNECT)) { |
| 4924 | auth = uri; |
| 4925 | |
| 4926 | if (!hpack_encode_header(&outbuf, ist(":authority"), auth)) { |
| 4927 | /* output full */ |
| 4928 | if (b_space_wraps(mbuf)) |
| 4929 | goto realign_again; |
| 4930 | goto full; |
| 4931 | } |
| 4932 | } else { |
| 4933 | /* other methods need a :scheme. If an authority is known from |
| 4934 | * the request line, it must be sent, otherwise only host is |
| 4935 | * sent. Host is never sent as the authority. |
| 4936 | */ |
| 4937 | struct ist scheme = { }; |
Christopher Faulet | 3b44c54 | 2019-06-14 10:46:51 +0200 | [diff] [blame] | 4938 | |
Willy Tarreau | b8ce890 | 2019-10-08 18:16:18 +0200 | [diff] [blame] | 4939 | if (uri.ptr[0] != '/' && uri.ptr[0] != '*') { |
| 4940 | /* the URI seems to start with a scheme */ |
| 4941 | int len = 1; |
| 4942 | |
| 4943 | while (len < uri.len && uri.ptr[len] != ':') |
| 4944 | len++; |
| 4945 | |
| 4946 | if (len + 2 < uri.len && uri.ptr[len + 1] == '/' && uri.ptr[len + 2] == '/') { |
| 4947 | /* make the uri start at the authority now */ |
| 4948 | scheme.ptr = uri.ptr; |
| 4949 | scheme.len = len, |
| 4950 | uri.ptr += len + 3; |
| 4951 | uri.len -= len + 3; |
| 4952 | |
| 4953 | /* find the auth part of the URI */ |
| 4954 | auth.ptr = uri.ptr; |
| 4955 | auth.len = 0; |
| 4956 | while (auth.len < uri.len && auth.ptr[auth.len] != '/') |
| 4957 | auth.len++; |
| 4958 | |
| 4959 | uri.ptr += auth.len; |
| 4960 | uri.len -= auth.len; |
| 4961 | } |
| 4962 | } |
| 4963 | |
| 4964 | if (!scheme.len) { |
| 4965 | /* no explicit scheme, we're using an origin-form URI, |
| 4966 | * probably from an H1 request transcoded to H2 via an |
| 4967 | * external layer, then received as H2 without authority. |
| 4968 | * So we have to look up the scheme from the HTX flags. |
| 4969 | * In such a case only http and https are possible, and |
| 4970 | * https is the default (sent by browsers). |
| 4971 | */ |
| 4972 | if ((sl->flags & (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP)) == (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP)) |
| 4973 | scheme = ist("http"); |
| 4974 | else |
| 4975 | scheme = ist("https"); |
| 4976 | } |
Christopher Faulet | 3b44c54 | 2019-06-14 10:46:51 +0200 | [diff] [blame] | 4977 | |
| 4978 | if (!hpack_encode_scheme(&outbuf, scheme)) { |
Willy Tarreau | 5be92ff | 2019-02-01 15:51:59 +0100 | [diff] [blame] | 4979 | /* output full */ |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 4980 | if (b_space_wraps(mbuf)) |
Willy Tarreau | 5be92ff | 2019-02-01 15:51:59 +0100 | [diff] [blame] | 4981 | goto realign_again; |
| 4982 | goto full; |
| 4983 | } |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 4984 | |
Willy Tarreau | b8ce890 | 2019-10-08 18:16:18 +0200 | [diff] [blame] | 4985 | if (auth.len && !hpack_encode_header(&outbuf, ist(":authority"), auth)) { |
Willy Tarreau | 5be92ff | 2019-02-01 15:51:59 +0100 | [diff] [blame] | 4986 | /* output full */ |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 4987 | if (b_space_wraps(mbuf)) |
Willy Tarreau | 5be92ff | 2019-02-01 15:51:59 +0100 | [diff] [blame] | 4988 | goto realign_again; |
| 4989 | goto full; |
| 4990 | } |
Willy Tarreau | 053c157 | 2019-02-01 16:13:59 +0100 | [diff] [blame] | 4991 | |
Willy Tarreau | b8ce890 | 2019-10-08 18:16:18 +0200 | [diff] [blame] | 4992 | /* encode the path. RFC7540#8.1.2.3: if path is empty it must |
| 4993 | * be sent as '/' or '*'. |
| 4994 | */ |
| 4995 | if (unlikely(!uri.len)) { |
| 4996 | if (sl->info.req.meth == HTTP_METH_OPTIONS) |
| 4997 | uri = ist("*"); |
| 4998 | else |
| 4999 | uri = ist("/"); |
Willy Tarreau | 053c157 | 2019-02-01 16:13:59 +0100 | [diff] [blame] | 5000 | } |
Willy Tarreau | 053c157 | 2019-02-01 16:13:59 +0100 | [diff] [blame] | 5001 | |
Willy Tarreau | b8ce890 | 2019-10-08 18:16:18 +0200 | [diff] [blame] | 5002 | if (!hpack_encode_path(&outbuf, uri)) { |
| 5003 | /* output full */ |
| 5004 | if (b_space_wraps(mbuf)) |
| 5005 | goto realign_again; |
| 5006 | goto full; |
| 5007 | } |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5008 | } |
| 5009 | |
Willy Tarreau | b8ce890 | 2019-10-08 18:16:18 +0200 | [diff] [blame] | 5010 | /* encode all headers, stop at empty name. Host is only sent if we |
| 5011 | * do not provide an authority. |
| 5012 | */ |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5013 | for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) { |
| 5014 | /* these ones do not exist in H2 and must be dropped. */ |
| 5015 | if (isteq(list[hdr].n, ist("connection")) || |
Willy Tarreau | b8ce890 | 2019-10-08 18:16:18 +0200 | [diff] [blame] | 5016 | (auth.len && isteq(list[hdr].n, ist("host"))) || |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5017 | isteq(list[hdr].n, ist("proxy-connection")) || |
| 5018 | isteq(list[hdr].n, ist("keep-alive")) || |
| 5019 | isteq(list[hdr].n, ist("upgrade")) || |
| 5020 | isteq(list[hdr].n, ist("transfer-encoding"))) |
| 5021 | continue; |
| 5022 | |
Christopher Faulet | 86d144c | 2019-08-14 16:32:25 +0200 | [diff] [blame] | 5023 | /* Skip all pseudo-headers */ |
| 5024 | if (*(list[hdr].n.ptr) == ':') |
| 5025 | continue; |
| 5026 | |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5027 | if (isteq(list[hdr].n, ist(""))) |
| 5028 | break; // end |
| 5029 | |
| 5030 | if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) { |
| 5031 | /* output full */ |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5032 | if (b_space_wraps(mbuf)) |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5033 | goto realign_again; |
| 5034 | goto full; |
| 5035 | } |
| 5036 | } |
| 5037 | |
Willy Tarreau | cb985a4 | 2019-10-07 16:56:34 +0200 | [diff] [blame] | 5038 | /* update the frame's size */ |
| 5039 | h2_set_frame_size(outbuf.area, outbuf.data - 9); |
| 5040 | |
| 5041 | if (outbuf.data > h2c->mfs + 9) { |
| 5042 | if (!h2_fragment_headers(&outbuf, h2c->mfs)) { |
| 5043 | /* output full */ |
| 5044 | if (b_space_wraps(mbuf)) |
| 5045 | goto realign_again; |
| 5046 | goto full; |
| 5047 | } |
| 5048 | } |
| 5049 | |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5050 | /* we may need to add END_STREAM if we have no body : |
| 5051 | * - request already closed, or : |
| 5052 | * - no transfer-encoding, and : |
| 5053 | * - no content-length or content-length:0 |
| 5054 | * Fixme: this doesn't take into account CONNECT requests. |
| 5055 | */ |
| 5056 | if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) |
| 5057 | es_now = 1; |
| 5058 | |
| 5059 | if (sl->flags & HTX_SL_F_BODYLESS) |
| 5060 | es_now = 1; |
| 5061 | |
Willy Tarreau | 927b88b | 2019-03-04 08:03:25 +0100 | [diff] [blame] | 5062 | if (!h2s->cs || h2s->cs->flags & CS_FL_SHW) |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5063 | es_now = 1; |
| 5064 | |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5065 | if (es_now) |
| 5066 | outbuf.area[4] |= H2_F_HEADERS_END_STREAM; |
| 5067 | |
| 5068 | /* commit the H2 response */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5069 | TRACE_USER("sent H2 request", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx); |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5070 | b_add(mbuf, outbuf.data); |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5071 | h2s->flags |= H2_SF_HEADERS_SENT; |
| 5072 | h2s->st = H2_SS_OPEN; |
| 5073 | |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5074 | if (es_now) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5075 | TRACE_PROTO("setting ES on HEADERS frame", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx); |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5076 | // trim any possibly pending data (eg: inconsistent content-length) |
| 5077 | h2s->flags |= H2_SF_ES_SENT; |
| 5078 | h2s->st = H2_SS_HLOC; |
| 5079 | } |
| 5080 | |
| 5081 | /* remove all header blocks including the EOH and compute the |
| 5082 | * corresponding size. |
| 5083 | * |
| 5084 | * FIXME: We should remove everything when es_now is set. |
| 5085 | */ |
| 5086 | ret = 0; |
| 5087 | idx = htx_get_head(htx); |
| 5088 | blk = htx_get_blk(htx, idx); |
| 5089 | while (blk != blk_end) { |
| 5090 | ret += htx_get_blksz(blk); |
| 5091 | blk = htx_remove_blk(htx, blk); |
| 5092 | } |
| 5093 | |
Christopher Faulet | 316934d | 2019-05-15 14:22:48 +0200 | [diff] [blame] | 5094 | if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) { |
| 5095 | ret += htx_get_blksz(blk_end); |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5096 | htx_remove_blk(htx, blk_end); |
Christopher Faulet | 316934d | 2019-05-15 14:22:48 +0200 | [diff] [blame] | 5097 | } |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5098 | |
| 5099 | end: |
| 5100 | return ret; |
| 5101 | full: |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 5102 | if ((mbuf = br_tail_add(h2c->mbuf)) != NULL) |
| 5103 | goto retry; |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5104 | h2c->flags |= H2_CF_MUX_MFULL; |
| 5105 | h2s->flags |= H2_SF_BLK_MROOM; |
| 5106 | ret = 0; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5107 | TRACE_STATE("mux buffer full", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_BLK, h2c->conn, h2s); |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5108 | goto end; |
| 5109 | fail: |
| 5110 | /* unparsable HTX messages, too large ones to be produced in the local |
| 5111 | * list etc go here (unrecoverable errors). |
| 5112 | */ |
| 5113 | h2s_error(h2s, H2_ERR_INTERNAL_ERROR); |
| 5114 | ret = 0; |
| 5115 | goto end; |
| 5116 | } |
| 5117 | |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5118 | /* Try to send a DATA frame matching HTTP response present in HTX structure |
Willy Tarreau | 98de12a | 2018-12-12 07:03:00 +0100 | [diff] [blame] | 5119 | * present in <buf>, for stream <h2s>. Returns the number of bytes sent. The |
| 5120 | * caller must check the stream's status to detect any error which might have |
| 5121 | * happened subsequently to a successful send. Returns the number of data bytes |
Christopher Faulet | 54b5e21 | 2019-06-04 10:08:28 +0200 | [diff] [blame] | 5122 | * consumed, or zero if nothing done. Note that EOM count for 1 byte. |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5123 | */ |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5124 | static size_t h2s_frt_make_resp_data(struct h2s *h2s, struct buffer *buf, size_t count) |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5125 | { |
| 5126 | struct h2c *h2c = h2s->h2c; |
Willy Tarreau | 98de12a | 2018-12-12 07:03:00 +0100 | [diff] [blame] | 5127 | struct htx *htx; |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5128 | struct buffer outbuf; |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5129 | struct buffer *mbuf; |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5130 | size_t total = 0; |
| 5131 | int es_now = 0; |
| 5132 | int bsize; /* htx block size */ |
| 5133 | int fsize; /* h2 frame size */ |
| 5134 | struct htx_blk *blk; |
| 5135 | enum htx_blk_type type; |
| 5136 | int idx; |
Willy Tarreau | c7ce4e3 | 2020-01-14 11:42:59 +0100 | [diff] [blame] | 5137 | int trunc_out; /* non-zero if truncated on out buf */ |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5138 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5139 | TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s); |
| 5140 | |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5141 | if (h2c_mux_busy(h2c, h2s)) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5142 | TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s); |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5143 | h2s->flags |= H2_SF_BLK_MBUSY; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5144 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s); |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5145 | goto end; |
| 5146 | } |
| 5147 | |
Willy Tarreau | 98de12a | 2018-12-12 07:03:00 +0100 | [diff] [blame] | 5148 | htx = htx_from_buf(buf); |
| 5149 | |
Christopher Faulet | 54b5e21 | 2019-06-04 10:08:28 +0200 | [diff] [blame] | 5150 | /* We only come here with HTX_BLK_DATA blocks. However, while looping, |
| 5151 | * we can meet an HTX_BLK_EOM block that we'll leave to the caller to |
| 5152 | * handle. |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5153 | */ |
| 5154 | |
| 5155 | new_frame: |
Willy Tarreau | ee57376 | 2018-12-04 15:25:57 +0100 | [diff] [blame] | 5156 | if (!count || htx_is_empty(htx)) |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5157 | goto end; |
| 5158 | |
| 5159 | idx = htx_get_head(htx); |
| 5160 | blk = htx_get_blk(htx, idx); |
Christopher Faulet | 54b5e21 | 2019-06-04 10:08:28 +0200 | [diff] [blame] | 5161 | type = htx_get_blk_type(blk); // DATA or EOM |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5162 | bsize = htx_get_blksz(blk); |
| 5163 | fsize = bsize; |
Willy Tarreau | c7ce4e3 | 2020-01-14 11:42:59 +0100 | [diff] [blame] | 5164 | trunc_out = 0; |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5165 | |
Christopher Faulet | 54b5e21 | 2019-06-04 10:08:28 +0200 | [diff] [blame] | 5166 | if (type == HTX_BLK_EOM) { |
Willy Tarreau | 7eeb10a | 2019-01-04 09:28:17 +0100 | [diff] [blame] | 5167 | if (h2s->flags & H2_SF_ES_SENT) { |
| 5168 | /* ES already sent */ |
| 5169 | htx_remove_blk(htx, blk); |
| 5170 | total++; // EOM counts as one byte |
| 5171 | count--; |
| 5172 | goto end; |
| 5173 | } |
| 5174 | } |
| 5175 | else if (type != HTX_BLK_DATA) |
Willy Tarreau | 2fb1d4c | 2018-12-04 15:28:03 +0100 | [diff] [blame] | 5176 | goto end; |
Willy Tarreau | 98de12a | 2018-12-12 07:03:00 +0100 | [diff] [blame] | 5177 | |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 5178 | mbuf = br_tail(h2c->mbuf); |
| 5179 | retry: |
| 5180 | if (!h2_get_buf(h2c, mbuf)) { |
| 5181 | h2c->flags |= H2_CF_MUX_MALLOC; |
| 5182 | h2s->flags |= H2_SF_BLK_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5183 | TRACE_STATE("waiting for room in output buffer", H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_H2S_BLK, h2c->conn, h2s); |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 5184 | goto end; |
| 5185 | } |
| 5186 | |
Willy Tarreau | 98de12a | 2018-12-12 07:03:00 +0100 | [diff] [blame] | 5187 | /* Perform some optimizations to reduce the number of buffer copies. |
| 5188 | * First, if the mux's buffer is empty and the htx area contains |
| 5189 | * exactly one data block of the same size as the requested count, and |
| 5190 | * this count fits within the frame size, the stream's window size, and |
| 5191 | * the connection's window size, then it's possible to simply swap the |
| 5192 | * caller's buffer with the mux's output buffer and adjust offsets and |
| 5193 | * length to match the entire DATA HTX block in the middle. In this |
| 5194 | * case we perform a true zero-copy operation from end-to-end. This is |
| 5195 | * the situation that happens all the time with large files. Second, if |
| 5196 | * this is not possible, but the mux's output buffer is empty, we still |
| 5197 | * have an opportunity to avoid the copy to the intermediary buffer, by |
| 5198 | * making the intermediary buffer's area point to the output buffer's |
| 5199 | * area. In this case we want to skip the HTX header to make sure that |
| 5200 | * copies remain aligned and that this operation remains possible all |
| 5201 | * the time. This goes for headers, data blocks and any data extracted |
| 5202 | * from the HTX blocks. |
| 5203 | */ |
| 5204 | if (unlikely(fsize == count && |
Christopher Faulet | 192c6a2 | 2019-06-11 16:32:24 +0200 | [diff] [blame] | 5205 | htx_nbblks(htx) == 1 && type == HTX_BLK_DATA && |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 5206 | fsize <= h2s_mws(h2s) && fsize <= h2c->mws && fsize <= h2c->mfs)) { |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5207 | void *old_area = mbuf->area; |
Willy Tarreau | 98de12a | 2018-12-12 07:03:00 +0100 | [diff] [blame] | 5208 | |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5209 | if (b_data(mbuf)) { |
Willy Tarreau | 8ab128c | 2019-03-21 17:47:28 +0100 | [diff] [blame] | 5210 | /* Too bad there are data left there. We're willing to memcpy/memmove |
| 5211 | * up to 1/4 of the buffer, which means that it's OK to copy a large |
| 5212 | * frame into a buffer containing few data if it needs to be realigned, |
| 5213 | * and that it's also OK to copy few data without realigning. Otherwise |
| 5214 | * we'll pretend the mbuf is full and wait for it to become empty. |
Willy Tarreau | 98de12a | 2018-12-12 07:03:00 +0100 | [diff] [blame] | 5215 | */ |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5216 | if (fsize + 9 <= b_room(mbuf) && |
| 5217 | (b_data(mbuf) <= b_size(mbuf) / 4 || |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5218 | (fsize <= b_size(mbuf) / 4 && fsize + 9 <= b_contig_space(mbuf)))) { |
| 5219 | TRACE_STATE("small data present in output buffer, appending", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s); |
Willy Tarreau | 98de12a | 2018-12-12 07:03:00 +0100 | [diff] [blame] | 5220 | goto copy; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5221 | } |
Willy Tarreau | 8ab128c | 2019-03-21 17:47:28 +0100 | [diff] [blame] | 5222 | |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 5223 | if ((mbuf = br_tail_add(h2c->mbuf)) != NULL) |
| 5224 | goto retry; |
| 5225 | |
Willy Tarreau | 98de12a | 2018-12-12 07:03:00 +0100 | [diff] [blame] | 5226 | h2c->flags |= H2_CF_MUX_MFULL; |
| 5227 | h2s->flags |= H2_SF_BLK_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5228 | TRACE_STATE("too large data present in output buffer, waiting for emptiness", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s); |
Willy Tarreau | 98de12a | 2018-12-12 07:03:00 +0100 | [diff] [blame] | 5229 | goto end; |
| 5230 | } |
| 5231 | |
| 5232 | /* map an H2 frame to the HTX block so that we can put the |
| 5233 | * frame header there. |
| 5234 | */ |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5235 | *mbuf = b_make(buf->area, buf->size, sizeof(struct htx) + blk->addr - 9, fsize + 9); |
| 5236 | outbuf.area = b_head(mbuf); |
Willy Tarreau | 98de12a | 2018-12-12 07:03:00 +0100 | [diff] [blame] | 5237 | |
| 5238 | /* prepend an H2 DATA frame header just before the DATA block */ |
| 5239 | memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5); |
| 5240 | write_n32(outbuf.area + 5, h2s->id); // 4 bytes |
| 5241 | h2_set_frame_size(outbuf.area, fsize); |
| 5242 | |
| 5243 | /* update windows */ |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 5244 | h2s->sws -= fsize; |
Willy Tarreau | 98de12a | 2018-12-12 07:03:00 +0100 | [diff] [blame] | 5245 | h2c->mws -= fsize; |
| 5246 | |
| 5247 | /* and exchange with our old area */ |
| 5248 | buf->area = old_area; |
| 5249 | buf->data = buf->head = 0; |
| 5250 | total += fsize; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5251 | |
| 5252 | TRACE_PROTO("sent H2 DATA frame (zero-copy)", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s); |
Willy Tarreau | 98de12a | 2018-12-12 07:03:00 +0100 | [diff] [blame] | 5253 | goto end; |
| 5254 | } |
Willy Tarreau | 2fb1d4c | 2018-12-04 15:28:03 +0100 | [diff] [blame] | 5255 | |
Willy Tarreau | 98de12a | 2018-12-12 07:03:00 +0100 | [diff] [blame] | 5256 | copy: |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5257 | /* for DATA and EOM we'll have to emit a frame, even if empty */ |
| 5258 | |
| 5259 | while (1) { |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5260 | outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0); |
| 5261 | if (outbuf.size >= 9 || !b_space_wraps(mbuf)) |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5262 | break; |
| 5263 | realign_again: |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5264 | b_slow_realign(mbuf, trash.area, b_data(mbuf)); |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5265 | } |
| 5266 | |
| 5267 | if (outbuf.size < 9) { |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 5268 | if ((mbuf = br_tail_add(h2c->mbuf)) != NULL) |
| 5269 | goto retry; |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5270 | h2c->flags |= H2_CF_MUX_MFULL; |
| 5271 | h2s->flags |= H2_SF_BLK_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5272 | TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s); |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5273 | goto end; |
| 5274 | } |
| 5275 | |
| 5276 | /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */ |
| 5277 | memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5); |
| 5278 | write_n32(outbuf.area + 5, h2s->id); // 4 bytes |
| 5279 | outbuf.data = 9; |
| 5280 | |
| 5281 | /* we have in <fsize> the exact number of bytes we need to copy from |
| 5282 | * the HTX buffer. We need to check this against the connection's and |
| 5283 | * the stream's send windows, and to ensure that this fits in the max |
| 5284 | * frame size and in the buffer's available space minus 9 bytes (for |
| 5285 | * the frame header). The connection's flow control is applied last so |
| 5286 | * that we can use a separate list of streams which are immediately |
| 5287 | * unblocked on window opening. Note: we don't implement padding. |
| 5288 | */ |
| 5289 | |
| 5290 | /* EOM is presented with bsize==1 but would lead to the emission of an |
| 5291 | * empty frame, thus we force it to zero here. |
| 5292 | */ |
| 5293 | if (type == HTX_BLK_EOM) |
| 5294 | bsize = fsize = 0; |
| 5295 | |
| 5296 | if (!fsize) |
| 5297 | goto send_empty; |
| 5298 | |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 5299 | if (h2s_mws(h2s) <= 0) { |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5300 | h2s->flags |= H2_SF_BLK_SFCTL; |
Willy Tarreau | c234ae3 | 2019-05-13 17:56:11 +0200 | [diff] [blame] | 5301 | if (LIST_ADDED(&h2s->list)) |
Olivier Houchard | bfe2a83 | 2019-05-10 14:02:21 +0200 | [diff] [blame] | 5302 | LIST_DEL_INIT(&h2s->list); |
Willy Tarreau | 9edf6db | 2019-10-02 10:49:59 +0200 | [diff] [blame] | 5303 | LIST_ADDQ(&h2c->blocked_list, &h2s->list); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5304 | TRACE_STATE("stream window <=0, flow-controlled", H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_H2S_FCTL, h2c->conn, h2s); |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5305 | goto end; |
| 5306 | } |
| 5307 | |
Willy Tarreau | ee57376 | 2018-12-04 15:25:57 +0100 | [diff] [blame] | 5308 | if (fsize > count) |
| 5309 | fsize = count; |
| 5310 | |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 5311 | if (fsize > h2s_mws(h2s)) |
| 5312 | fsize = h2s_mws(h2s); // >0 |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5313 | |
| 5314 | if (h2c->mfs && fsize > h2c->mfs) |
| 5315 | fsize = h2c->mfs; // >0 |
| 5316 | |
| 5317 | if (fsize + 9 > outbuf.size) { |
Willy Tarreau | 455d568 | 2019-05-24 19:42:18 +0200 | [diff] [blame] | 5318 | /* It doesn't fit at once. If it at least fits once split and |
| 5319 | * the amount of data to move is low, let's defragment the |
| 5320 | * buffer now. |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5321 | */ |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5322 | if (b_space_wraps(mbuf) && |
| 5323 | (fsize + 9 <= b_room(mbuf)) && |
| 5324 | b_data(mbuf) <= MAX_DATA_REALIGN) |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5325 | goto realign_again; |
| 5326 | fsize = outbuf.size - 9; |
Willy Tarreau | c7ce4e3 | 2020-01-14 11:42:59 +0100 | [diff] [blame] | 5327 | trunc_out = 1; |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5328 | |
| 5329 | if (fsize <= 0) { |
| 5330 | /* no need to send an empty frame here */ |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 5331 | if ((mbuf = br_tail_add(h2c->mbuf)) != NULL) |
| 5332 | goto retry; |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5333 | h2c->flags |= H2_CF_MUX_MFULL; |
| 5334 | h2s->flags |= H2_SF_BLK_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5335 | TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s); |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5336 | goto end; |
| 5337 | } |
| 5338 | } |
| 5339 | |
| 5340 | if (h2c->mws <= 0) { |
| 5341 | h2s->flags |= H2_SF_BLK_MFCTL; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5342 | TRACE_STATE("connection window <=0, stream flow-controlled", H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_H2C_FCTL, h2c->conn, h2s); |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5343 | goto end; |
| 5344 | } |
| 5345 | |
| 5346 | if (fsize > h2c->mws) |
| 5347 | fsize = h2c->mws; |
| 5348 | |
| 5349 | /* now let's copy this this into the output buffer */ |
| 5350 | memcpy(outbuf.area + 9, htx_get_blk_ptr(htx, blk), fsize); |
Willy Tarreau | 1d4a0f8 | 2019-08-02 07:52:08 +0200 | [diff] [blame] | 5351 | h2s->sws -= fsize; |
Willy Tarreau | 0f799ca | 2018-12-04 15:20:11 +0100 | [diff] [blame] | 5352 | h2c->mws -= fsize; |
Willy Tarreau | ee57376 | 2018-12-04 15:25:57 +0100 | [diff] [blame] | 5353 | count -= fsize; |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5354 | |
| 5355 | send_empty: |
| 5356 | /* update the frame's size */ |
| 5357 | h2_set_frame_size(outbuf.area, fsize); |
| 5358 | |
| 5359 | /* FIXME: for now we only set the ES flag on empty DATA frames, once |
| 5360 | * meeting EOM. We should optimize this later. |
| 5361 | */ |
| 5362 | if (type == HTX_BLK_EOM) { |
Willy Tarreau | ee57376 | 2018-12-04 15:25:57 +0100 | [diff] [blame] | 5363 | total++; // EOM counts as one byte |
| 5364 | count--; |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5365 | es_now = 1; |
| 5366 | } |
| 5367 | |
| 5368 | if (es_now) |
| 5369 | outbuf.area[4] |= H2_F_DATA_END_STREAM; |
| 5370 | |
| 5371 | /* commit the H2 response */ |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5372 | b_add(mbuf, fsize + 9); |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5373 | |
| 5374 | /* consume incoming HTX block, including EOM */ |
| 5375 | total += fsize; |
| 5376 | if (fsize == bsize) { |
| 5377 | htx_remove_blk(htx, blk); |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5378 | if (fsize) { |
| 5379 | TRACE_DEVEL("more data available, trying to send another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s); |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5380 | goto new_frame; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5381 | } |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5382 | } else { |
| 5383 | /* we've truncated this block */ |
| 5384 | htx_cut_data_blk(htx, blk, fsize); |
Willy Tarreau | c7ce4e3 | 2020-01-14 11:42:59 +0100 | [diff] [blame] | 5385 | if (trunc_out) |
| 5386 | goto new_frame; |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5387 | } |
| 5388 | |
| 5389 | if (es_now) { |
| 5390 | if (h2s->st == H2_SS_OPEN) |
| 5391 | h2s->st = H2_SS_HLOC; |
| 5392 | else |
| 5393 | h2s_close(h2s); |
| 5394 | |
| 5395 | h2s->flags |= H2_SF_ES_SENT; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5396 | TRACE_PROTO("ES flag set on outgoing frame", H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s); |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5397 | } |
| 5398 | |
| 5399 | end: |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5400 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s); |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5401 | return total; |
| 5402 | } |
| 5403 | |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5404 | /* Try to send a HEADERS frame matching HTX_BLK_TLR series of blocks present in |
| 5405 | * HTX message <htx> for the H2 stream <h2s>. Returns the number of bytes |
| 5406 | * processed. The caller must check the stream's status to detect any error |
| 5407 | * which might have happened subsequently to a successful send. The htx blocks |
| 5408 | * are automatically removed from the message. The htx message is assumed to be |
| 5409 | * valid since produced from the internal code. Processing stops when meeting |
Willy Tarreau | fb07b3f | 2019-05-06 11:23:29 +0200 | [diff] [blame] | 5410 | * the EOM, which is *not* removed. All trailers are processed at once and sent |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5411 | * as a single frame. The ES flag is always set. |
| 5412 | */ |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5413 | static size_t h2s_make_trailers(struct h2s *h2s, struct htx *htx) |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5414 | { |
Christopher Faulet | e4ab11b | 2019-06-11 15:05:37 +0200 | [diff] [blame] | 5415 | struct http_hdr list[global.tune.max_http_hdr]; |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5416 | struct h2c *h2c = h2s->h2c; |
| 5417 | struct htx_blk *blk; |
| 5418 | struct htx_blk *blk_end; |
| 5419 | struct buffer outbuf; |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5420 | struct buffer *mbuf; |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5421 | enum htx_blk_type type; |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5422 | int ret = 0; |
| 5423 | int hdr; |
| 5424 | int idx; |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5425 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5426 | TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s); |
| 5427 | |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5428 | if (h2c_mux_busy(h2c, h2s)) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5429 | TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s); |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5430 | h2s->flags |= H2_SF_BLK_MBUSY; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5431 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s); |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5432 | goto end; |
| 5433 | } |
| 5434 | |
Christopher Faulet | 2d7c539 | 2019-06-03 10:41:26 +0200 | [diff] [blame] | 5435 | /* determine the first block which must not be deleted, blk_end may |
| 5436 | * be NULL if all blocks have to be deleted. also get trailers. |
| 5437 | */ |
| 5438 | idx = htx_get_head(htx); |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5439 | blk_end = NULL; |
| 5440 | |
Christopher Faulet | 2d7c539 | 2019-06-03 10:41:26 +0200 | [diff] [blame] | 5441 | hdr = 0; |
| 5442 | while (idx != -1) { |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5443 | blk = htx_get_blk(htx, idx); |
| 5444 | type = htx_get_blk_type(blk); |
Christopher Faulet | 2d7c539 | 2019-06-03 10:41:26 +0200 | [diff] [blame] | 5445 | idx = htx_get_next(htx, idx); |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5446 | if (type == HTX_BLK_UNUSED) |
| 5447 | continue; |
| 5448 | |
Christopher Faulet | 2d7c539 | 2019-06-03 10:41:26 +0200 | [diff] [blame] | 5449 | if (type == HTX_BLK_EOT) { |
| 5450 | if (idx != -1) |
| 5451 | blk_end = blk; |
| 5452 | break; |
| 5453 | } |
Willy Tarreau | fb07b3f | 2019-05-06 11:23:29 +0200 | [diff] [blame] | 5454 | if (type != HTX_BLK_TLR) |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5455 | break; |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5456 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5457 | if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) { |
| 5458 | TRACE_PROTO("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s); |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5459 | goto fail; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5460 | } |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5461 | |
Christopher Faulet | 2d7c539 | 2019-06-03 10:41:26 +0200 | [diff] [blame] | 5462 | list[hdr].n = htx_get_blk_name(htx, blk); |
| 5463 | list[hdr].v = htx_get_blk_value(htx, blk); |
| 5464 | hdr++; |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5465 | } |
| 5466 | |
Christopher Faulet | 2d7c539 | 2019-06-03 10:41:26 +0200 | [diff] [blame] | 5467 | /* marker for end of trailers */ |
| 5468 | list[hdr].n = ist(""); |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5469 | |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 5470 | mbuf = br_tail(h2c->mbuf); |
| 5471 | retry: |
| 5472 | if (!h2_get_buf(h2c, mbuf)) { |
| 5473 | h2c->flags |= H2_CF_MUX_MALLOC; |
| 5474 | h2s->flags |= H2_SF_BLK_MROOM; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5475 | TRACE_STATE("waiting for room in output buffer", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_BLK, h2c->conn, h2s); |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 5476 | goto end; |
| 5477 | } |
| 5478 | |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5479 | chunk_reset(&outbuf); |
| 5480 | |
| 5481 | while (1) { |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5482 | outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0); |
| 5483 | if (outbuf.size >= 9 || !b_space_wraps(mbuf)) |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5484 | break; |
| 5485 | realign_again: |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5486 | b_slow_realign(mbuf, trash.area, b_data(mbuf)); |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5487 | } |
| 5488 | |
| 5489 | if (outbuf.size < 9) |
| 5490 | goto full; |
| 5491 | |
| 5492 | /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4,ES=1 */ |
| 5493 | memcpy(outbuf.area, "\x00\x00\x00\x01\x05", 5); |
| 5494 | write_n32(outbuf.area + 5, h2s->id); // 4 bytes |
| 5495 | outbuf.data = 9; |
| 5496 | |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5497 | /* encode all headers */ |
| 5498 | for (idx = 0; idx < hdr; idx++) { |
| 5499 | /* these ones do not exist in H2 or must not appear in |
| 5500 | * trailers and must be dropped. |
| 5501 | */ |
| 5502 | if (isteq(list[idx].n, ist("host")) || |
| 5503 | isteq(list[idx].n, ist("content-length")) || |
| 5504 | isteq(list[idx].n, ist("connection")) || |
| 5505 | isteq(list[idx].n, ist("proxy-connection")) || |
| 5506 | isteq(list[idx].n, ist("keep-alive")) || |
| 5507 | isteq(list[idx].n, ist("upgrade")) || |
| 5508 | isteq(list[idx].n, ist("te")) || |
| 5509 | isteq(list[idx].n, ist("transfer-encoding"))) |
| 5510 | continue; |
| 5511 | |
Christopher Faulet | 86d144c | 2019-08-14 16:32:25 +0200 | [diff] [blame] | 5512 | /* Skip all pseudo-headers */ |
| 5513 | if (*(list[idx].n.ptr) == ':') |
| 5514 | continue; |
| 5515 | |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5516 | if (!hpack_encode_header(&outbuf, list[idx].n, list[idx].v)) { |
| 5517 | /* output full */ |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5518 | if (b_space_wraps(mbuf)) |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5519 | goto realign_again; |
| 5520 | goto full; |
| 5521 | } |
| 5522 | } |
| 5523 | |
Willy Tarreau | 5121e5d | 2019-05-06 15:13:41 +0200 | [diff] [blame] | 5524 | if (outbuf.data == 9) { |
| 5525 | /* here we have a problem, we have nothing to emit (either we |
| 5526 | * received an empty trailers block followed or we removed its |
| 5527 | * contents above). Because of this we can't send a HEADERS |
| 5528 | * frame, so we have to cheat and instead send an empty DATA |
| 5529 | * frame conveying the ES flag. |
Willy Tarreau | 67b8cae | 2019-02-21 18:16:35 +0100 | [diff] [blame] | 5530 | */ |
| 5531 | outbuf.area[3] = H2_FT_DATA; |
| 5532 | outbuf.area[4] = H2_F_DATA_END_STREAM; |
| 5533 | } |
| 5534 | |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5535 | /* update the frame's size */ |
| 5536 | h2_set_frame_size(outbuf.area, outbuf.data - 9); |
| 5537 | |
Willy Tarreau | 572d9f5 | 2019-10-11 16:58:37 +0200 | [diff] [blame] | 5538 | if (outbuf.data > h2c->mfs + 9) { |
| 5539 | if (!h2_fragment_headers(&outbuf, h2c->mfs)) { |
| 5540 | /* output full */ |
| 5541 | if (b_space_wraps(mbuf)) |
| 5542 | goto realign_again; |
| 5543 | goto full; |
| 5544 | } |
| 5545 | } |
| 5546 | |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5547 | /* commit the H2 response */ |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5548 | TRACE_PROTO("sent H2 trailers HEADERS frame", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_TX_EOI, h2c->conn, h2s); |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5549 | b_add(mbuf, outbuf.data); |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5550 | h2s->flags |= H2_SF_ES_SENT; |
| 5551 | |
| 5552 | if (h2s->st == H2_SS_OPEN) |
| 5553 | h2s->st = H2_SS_HLOC; |
| 5554 | else |
| 5555 | h2s_close(h2s); |
| 5556 | |
| 5557 | /* OK we could properly deliver the response */ |
| 5558 | done: |
Willy Tarreau | fb07b3f | 2019-05-06 11:23:29 +0200 | [diff] [blame] | 5559 | /* remove all header blocks till the end and compute the corresponding size. */ |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5560 | ret = 0; |
| 5561 | idx = htx_get_head(htx); |
| 5562 | blk = htx_get_blk(htx, idx); |
| 5563 | while (blk != blk_end) { |
| 5564 | ret += htx_get_blksz(blk); |
| 5565 | blk = htx_remove_blk(htx, blk); |
| 5566 | } |
Christopher Faulet | 2d7c539 | 2019-06-03 10:41:26 +0200 | [diff] [blame] | 5567 | |
| 5568 | if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) { |
| 5569 | ret += htx_get_blksz(blk_end); |
| 5570 | htx_remove_blk(htx, blk_end); |
| 5571 | } |
| 5572 | |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5573 | end: |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5574 | TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s); |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5575 | return ret; |
| 5576 | full: |
Willy Tarreau | 9c218e7 | 2019-05-26 10:08:28 +0200 | [diff] [blame] | 5577 | if ((mbuf = br_tail_add(h2c->mbuf)) != NULL) |
| 5578 | goto retry; |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5579 | h2c->flags |= H2_CF_MUX_MFULL; |
| 5580 | h2s->flags |= H2_SF_BLK_MROOM; |
| 5581 | ret = 0; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5582 | TRACE_STATE("mux buffer full", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_BLK, h2c->conn, h2s); |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5583 | goto end; |
| 5584 | fail: |
| 5585 | /* unparsable HTX messages, too large ones to be produced in the local |
| 5586 | * list etc go here (unrecoverable errors). |
| 5587 | */ |
| 5588 | h2s_error(h2s, H2_ERR_INTERNAL_ERROR); |
| 5589 | ret = 0; |
| 5590 | goto end; |
| 5591 | } |
| 5592 | |
Willy Tarreau | ee1a6fc | 2020-01-17 07:52:13 +0100 | [diff] [blame] | 5593 | /* Called from the upper layer, to subscribe <es> to events <event_type>. The |
| 5594 | * event subscriber <es> is not allowed to change from a previous call as long |
| 5595 | * as at least one event is still subscribed. The <event_type> must only be a |
| 5596 | * combination of SUB_RETRY_RECV and SUB_RETRY_SEND. It always returns 0. |
Willy Tarreau | 749f5ca | 2019-03-21 19:19:36 +0100 | [diff] [blame] | 5597 | */ |
Willy Tarreau | ee1a6fc | 2020-01-17 07:52:13 +0100 | [diff] [blame] | 5598 | static int h2_subscribe(struct conn_stream *cs, int event_type, struct wait_event *es) |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 5599 | { |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 5600 | struct h2s *h2s = cs->ctx; |
Olivier Houchard | 4cf7fb1 | 2018-08-02 19:23:05 +0200 | [diff] [blame] | 5601 | struct h2c *h2c = h2s->h2c; |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 5602 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5603 | TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s); |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 5604 | |
| 5605 | BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV)); |
| 5606 | BUG_ON(h2s->subs && h2s->subs->events & event_type); |
Willy Tarreau | ee1a6fc | 2020-01-17 07:52:13 +0100 | [diff] [blame] | 5607 | BUG_ON(h2s->subs && h2s->subs != es); |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 5608 | |
Willy Tarreau | ee1a6fc | 2020-01-17 07:52:13 +0100 | [diff] [blame] | 5609 | es->events |= event_type; |
| 5610 | h2s->subs = es; |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 5611 | |
| 5612 | if (event_type & SUB_RETRY_RECV) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5613 | TRACE_DEVEL("subscribe(recv)", H2_EV_STRM_RECV, h2c->conn, h2s); |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 5614 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 5615 | if (event_type & SUB_RETRY_SEND) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5616 | TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2c->conn, h2s); |
Olivier Houchard | f833815 | 2019-05-14 17:50:32 +0200 | [diff] [blame] | 5617 | if (!(h2s->flags & H2_SF_BLK_SFCTL) && |
| 5618 | !LIST_ADDED(&h2s->list)) { |
| 5619 | if (h2s->flags & H2_SF_BLK_MFCTL) |
| 5620 | LIST_ADDQ(&h2c->fctl_list, &h2s->list); |
| 5621 | else |
| 5622 | LIST_ADDQ(&h2c->send_list, &h2s->list); |
Olivier Houchard | e1c6dbc | 2018-08-01 17:06:43 +0200 | [diff] [blame] | 5623 | } |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 5624 | } |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5625 | TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s); |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 5626 | return 0; |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 5627 | } |
| 5628 | |
Willy Tarreau | ee1a6fc | 2020-01-17 07:52:13 +0100 | [diff] [blame] | 5629 | /* Called from the upper layer, to unsubscribe <es> from events <event_type>. |
| 5630 | * The <es> pointer is not allowed to differ from the one passed to the |
| 5631 | * subscribe() call. It always returns zero. |
Willy Tarreau | 749f5ca | 2019-03-21 19:19:36 +0100 | [diff] [blame] | 5632 | */ |
Willy Tarreau | ee1a6fc | 2020-01-17 07:52:13 +0100 | [diff] [blame] | 5633 | static int h2_unsubscribe(struct conn_stream *cs, int event_type, struct wait_event *es) |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 5634 | { |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 5635 | struct h2s *h2s = cs->ctx; |
| 5636 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5637 | TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s); |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 5638 | |
| 5639 | BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV)); |
Willy Tarreau | ee1a6fc | 2020-01-17 07:52:13 +0100 | [diff] [blame] | 5640 | BUG_ON(h2s->subs && h2s->subs != es); |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 5641 | |
Willy Tarreau | ee1a6fc | 2020-01-17 07:52:13 +0100 | [diff] [blame] | 5642 | es->events &= ~event_type; |
| 5643 | if (!es->events) |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 5644 | h2s->subs = NULL; |
| 5645 | |
| 5646 | if (event_type & SUB_RETRY_RECV) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5647 | TRACE_DEVEL("unsubscribe(recv)", H2_EV_STRM_RECV, h2s->h2c->conn, h2s); |
Willy Tarreau | d946416 | 2020-01-10 18:25:07 +0100 | [diff] [blame] | 5648 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 5649 | if (event_type & SUB_RETRY_SEND) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5650 | TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2s->h2c->conn, h2s); |
Willy Tarreau | d946416 | 2020-01-10 18:25:07 +0100 | [diff] [blame] | 5651 | h2s->flags &= ~H2_SF_NOTIFIED; |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 5652 | if (!(h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW))) |
| 5653 | LIST_DEL_INIT(&h2s->list); |
Olivier Houchard | d846c26 | 2018-10-19 17:24:29 +0200 | [diff] [blame] | 5654 | } |
Willy Tarreau | f96508a | 2020-01-10 11:12:48 +0100 | [diff] [blame] | 5655 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5656 | TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s); |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 5657 | return 0; |
| 5658 | } |
| 5659 | |
| 5660 | |
Olivier Houchard | 511efea | 2018-08-16 15:30:32 +0200 | [diff] [blame] | 5661 | /* Called from the upper layer, to receive data */ |
| 5662 | static size_t h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags) |
| 5663 | { |
Olivier Houchard | 638b799 | 2018-08-16 15:41:52 +0200 | [diff] [blame] | 5664 | struct h2s *h2s = cs->ctx; |
Willy Tarreau | 082f559 | 2018-11-25 08:03:32 +0100 | [diff] [blame] | 5665 | struct h2c *h2c = h2s->h2c; |
Willy Tarreau | 86724e2 | 2018-12-01 23:19:43 +0100 | [diff] [blame] | 5666 | struct htx *h2s_htx = NULL; |
| 5667 | struct htx *buf_htx = NULL; |
Olivier Houchard | 511efea | 2018-08-16 15:30:32 +0200 | [diff] [blame] | 5668 | size_t ret = 0; |
| 5669 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5670 | TRACE_ENTER(H2_EV_STRM_RECV, h2c->conn, h2s); |
| 5671 | |
Olivier Houchard | 511efea | 2018-08-16 15:30:32 +0200 | [diff] [blame] | 5672 | /* transfer possibly pending data to the upper layer */ |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5673 | h2s_htx = htx_from_buf(&h2s->rxbuf); |
| 5674 | if (htx_is_empty(h2s_htx)) { |
| 5675 | /* Here htx_to_buf() will set buffer data to 0 because |
| 5676 | * the HTX is empty. |
| 5677 | */ |
| 5678 | htx_to_buf(h2s_htx, &h2s->rxbuf); |
| 5679 | goto end; |
| 5680 | } |
Willy Tarreau | 7196dd6 | 2019-03-05 10:51:11 +0100 | [diff] [blame] | 5681 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5682 | ret = h2s_htx->data; |
| 5683 | buf_htx = htx_from_buf(buf); |
Willy Tarreau | 7196dd6 | 2019-03-05 10:51:11 +0100 | [diff] [blame] | 5684 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5685 | /* <buf> is empty and the message is small enough, swap the |
| 5686 | * buffers. */ |
| 5687 | if (htx_is_empty(buf_htx) && htx_used_space(h2s_htx) <= count) { |
Christopher Faulet | 27ba2dc | 2018-12-05 11:53:24 +0100 | [diff] [blame] | 5688 | htx_to_buf(buf_htx, buf); |
| 5689 | htx_to_buf(h2s_htx, &h2s->rxbuf); |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5690 | b_xfer(buf, &h2s->rxbuf, b_data(&h2s->rxbuf)); |
| 5691 | goto end; |
Willy Tarreau | 86724e2 | 2018-12-01 23:19:43 +0100 | [diff] [blame] | 5692 | } |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5693 | |
| 5694 | htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_EOM); |
| 5695 | |
| 5696 | if (h2s_htx->flags & HTX_FL_PARSING_ERROR) { |
| 5697 | buf_htx->flags |= HTX_FL_PARSING_ERROR; |
| 5698 | if (htx_is_empty(buf_htx)) |
| 5699 | cs->flags |= CS_FL_EOI; |
Willy Tarreau | 86724e2 | 2018-12-01 23:19:43 +0100 | [diff] [blame] | 5700 | } |
Olivier Houchard | 511efea | 2018-08-16 15:30:32 +0200 | [diff] [blame] | 5701 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5702 | buf_htx->extra = (h2s_htx->extra ? (h2s_htx->data + h2s_htx->extra) : 0); |
| 5703 | htx_to_buf(buf_htx, buf); |
| 5704 | htx_to_buf(h2s_htx, &h2s->rxbuf); |
| 5705 | ret -= h2s_htx->data; |
| 5706 | |
Christopher Faulet | 37070b2 | 2019-02-14 15:12:14 +0100 | [diff] [blame] | 5707 | end: |
Olivier Houchard | 638b799 | 2018-08-16 15:41:52 +0200 | [diff] [blame] | 5708 | if (b_data(&h2s->rxbuf)) |
Olivier Houchard | d247be0 | 2018-12-06 16:22:29 +0100 | [diff] [blame] | 5709 | cs->flags |= (CS_FL_RCV_MORE | CS_FL_WANT_ROOM); |
Olivier Houchard | 511efea | 2018-08-16 15:30:32 +0200 | [diff] [blame] | 5710 | else { |
Olivier Houchard | d247be0 | 2018-12-06 16:22:29 +0100 | [diff] [blame] | 5711 | cs->flags &= ~(CS_FL_RCV_MORE | CS_FL_WANT_ROOM); |
Christopher Faulet | fa922f0 | 2019-05-07 10:55:17 +0200 | [diff] [blame] | 5712 | if (h2s->flags & H2_SF_ES_RCVD) |
| 5713 | cs->flags |= CS_FL_EOI; |
Willy Tarreau | 76c8382 | 2019-06-15 09:55:50 +0200 | [diff] [blame] | 5714 | if (conn_xprt_read0_pending(h2c->conn) || h2s->st == H2_SS_CLOSED) |
Olivier Houchard | 511efea | 2018-08-16 15:30:32 +0200 | [diff] [blame] | 5715 | cs->flags |= CS_FL_EOS; |
Olivier Houchard | 71748cb | 2018-12-17 14:16:46 +0100 | [diff] [blame] | 5716 | if (cs->flags & CS_FL_ERR_PENDING) |
| 5717 | cs->flags |= CS_FL_ERROR; |
Olivier Houchard | 638b799 | 2018-08-16 15:41:52 +0200 | [diff] [blame] | 5718 | if (b_size(&h2s->rxbuf)) { |
| 5719 | b_free(&h2s->rxbuf); |
| 5720 | offer_buffers(NULL, tasks_run_queue); |
| 5721 | } |
Olivier Houchard | 511efea | 2018-08-16 15:30:32 +0200 | [diff] [blame] | 5722 | } |
| 5723 | |
Willy Tarreau | 082f559 | 2018-11-25 08:03:32 +0100 | [diff] [blame] | 5724 | if (ret && h2c->dsi == h2s->id) { |
| 5725 | /* demux is blocking on this stream's buffer */ |
| 5726 | h2c->flags &= ~H2_CF_DEM_SFULL; |
Olivier Houchard | 3ca18bf | 2019-04-05 15:34:34 +0200 | [diff] [blame] | 5727 | h2c_restart_reading(h2c, 1); |
Willy Tarreau | 082f559 | 2018-11-25 08:03:32 +0100 | [diff] [blame] | 5728 | } |
Christopher Faulet | 37070b2 | 2019-02-14 15:12:14 +0100 | [diff] [blame] | 5729 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5730 | TRACE_LEAVE(H2_EV_STRM_RECV, h2c->conn, h2s); |
Olivier Houchard | 511efea | 2018-08-16 15:30:32 +0200 | [diff] [blame] | 5731 | return ret; |
| 5732 | } |
| 5733 | |
Olivier Houchard | d846c26 | 2018-10-19 17:24:29 +0200 | [diff] [blame] | 5734 | |
Willy Tarreau | 749f5ca | 2019-03-21 19:19:36 +0100 | [diff] [blame] | 5735 | /* Called from the upper layer, to send data from buffer <buf> for no more than |
| 5736 | * <count> bytes. Returns the number of bytes effectively sent. Some status |
| 5737 | * flags may be updated on the conn_stream. |
| 5738 | */ |
Christopher Faulet | d44a9b3 | 2018-07-27 11:59:41 +0200 | [diff] [blame] | 5739 | static size_t h2_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags) |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 5740 | { |
Willy Tarreau | 9e5ae1d | 2017-10-17 19:58:20 +0200 | [diff] [blame] | 5741 | struct h2s *h2s = cs->ctx; |
Willy Tarreau | 1dc41e7 | 2018-06-14 13:21:28 +0200 | [diff] [blame] | 5742 | size_t total = 0; |
Willy Tarreau | 5dd1735 | 2018-06-14 13:33:30 +0200 | [diff] [blame] | 5743 | size_t ret; |
Willy Tarreau | bcd3bb3 | 2018-12-01 18:59:00 +0100 | [diff] [blame] | 5744 | struct htx *htx; |
| 5745 | struct htx_blk *blk; |
| 5746 | enum htx_blk_type btype; |
| 5747 | uint32_t bsize; |
| 5748 | int32_t idx; |
Willy Tarreau | 9e5ae1d | 2017-10-17 19:58:20 +0200 | [diff] [blame] | 5749 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5750 | TRACE_ENTER(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s); |
| 5751 | |
Olivier Houchard | d360ac6 | 2019-03-22 17:37:16 +0100 | [diff] [blame] | 5752 | /* If we were not just woken because we wanted to send but couldn't, |
| 5753 | * and there's somebody else that is waiting to send, do nothing, |
| 5754 | * we will subscribe later and be put at the end of the list |
| 5755 | */ |
Willy Tarreau | d946416 | 2020-01-10 18:25:07 +0100 | [diff] [blame] | 5756 | if (!(h2s->flags & H2_SF_NOTIFIED) && |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5757 | (!LIST_ISEMPTY(&h2s->h2c->send_list) || !LIST_ISEMPTY(&h2s->h2c->fctl_list))) { |
| 5758 | TRACE_DEVEL("other streams already waiting, going to the queue and leaving", H2_EV_H2S_SEND|H2_EV_H2S_BLK, h2s->h2c->conn, h2s); |
Olivier Houchard | d360ac6 | 2019-03-22 17:37:16 +0100 | [diff] [blame] | 5759 | return 0; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5760 | } |
Willy Tarreau | d946416 | 2020-01-10 18:25:07 +0100 | [diff] [blame] | 5761 | h2s->flags &= ~H2_SF_NOTIFIED; |
Olivier Houchard | 998410a | 2019-04-15 19:23:37 +0200 | [diff] [blame] | 5762 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5763 | if (h2s->h2c->st0 < H2_CS_FRAME_H) { |
| 5764 | TRACE_DEVEL("connection not ready, leaving", H2_EV_H2S_SEND|H2_EV_H2S_BLK, h2s->h2c->conn, h2s); |
Willy Tarreau | 6bf641a | 2018-10-08 09:43:03 +0200 | [diff] [blame] | 5765 | return 0; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5766 | } |
Willy Tarreau | 6bf641a | 2018-10-08 09:43:03 +0200 | [diff] [blame] | 5767 | |
Willy Tarreau | cab2295 | 2019-10-31 15:48:18 +0100 | [diff] [blame] | 5768 | if (h2s->h2c->st0 >= H2_CS_ERROR) { |
| 5769 | cs->flags |= CS_FL_ERROR; |
| 5770 | TRACE_DEVEL("connection is in error, leaving in error", H2_EV_H2S_SEND|H2_EV_H2S_BLK|H2_EV_H2S_ERR|H2_EV_STRM_ERR, h2s->h2c->conn, h2s); |
| 5771 | return 0; |
| 5772 | } |
| 5773 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5774 | htx = htx_from_buf(buf); |
Willy Tarreau | bcd3bb3 | 2018-12-01 18:59:00 +0100 | [diff] [blame] | 5775 | |
Willy Tarreau | 0bad043 | 2018-06-14 16:54:01 +0200 | [diff] [blame] | 5776 | if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count) |
Willy Tarreau | c4312d3 | 2017-11-07 12:01:53 +0100 | [diff] [blame] | 5777 | h2s->flags |= H2_SF_OUTGOING_DATA; |
| 5778 | |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 5779 | if (h2s->id == 0) { |
| 5780 | int32_t id = h2c_get_next_sid(h2s->h2c); |
| 5781 | |
| 5782 | if (id < 0) { |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 5783 | cs->flags |= CS_FL_ERROR; |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5784 | TRACE_DEVEL("couldn't get a stream ID, leaving in error", H2_EV_H2S_SEND|H2_EV_H2S_BLK|H2_EV_H2S_ERR|H2_EV_STRM_ERR, h2s->h2c->conn, h2s); |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 5785 | return 0; |
| 5786 | } |
| 5787 | |
| 5788 | eb32_delete(&h2s->by_id); |
| 5789 | h2s->by_id.key = h2s->id = id; |
| 5790 | h2s->h2c->max_id = id; |
Willy Tarreau | d64a3eb | 2019-01-23 10:22:21 +0100 | [diff] [blame] | 5791 | h2s->h2c->nb_reserved--; |
Willy Tarreau | 751f2d0 | 2018-10-05 09:35:00 +0200 | [diff] [blame] | 5792 | eb32_insert(&h2s->h2c->streams_by_id, &h2s->by_id); |
| 5793 | } |
| 5794 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5795 | while (h2s->st < H2_SS_HLOC && !(h2s->flags & H2_SF_BLK_ANY) && |
| 5796 | count && !htx_is_empty(htx)) { |
| 5797 | idx = htx_get_head(htx); |
| 5798 | blk = htx_get_blk(htx, idx); |
| 5799 | btype = htx_get_blk_type(blk); |
| 5800 | bsize = htx_get_blksz(blk); |
Willy Tarreau | bcd3bb3 | 2018-12-01 18:59:00 +0100 | [diff] [blame] | 5801 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5802 | switch (btype) { |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5803 | case HTX_BLK_REQ_SL: |
| 5804 | /* start-line before headers */ |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5805 | ret = h2s_bck_make_req_headers(h2s, htx); |
Willy Tarreau | 8073969 | 2018-10-05 11:35:57 +0200 | [diff] [blame] | 5806 | if (ret > 0) { |
| 5807 | total += ret; |
| 5808 | count -= ret; |
| 5809 | if (ret < bsize) |
| 5810 | goto done; |
| 5811 | } |
| 5812 | break; |
| 5813 | |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 5814 | case HTX_BLK_RES_SL: |
| 5815 | /* start-line before headers */ |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5816 | ret = h2s_frt_make_resp_headers(h2s, htx); |
Willy Tarreau | 115e83b | 2018-12-01 19:17:53 +0100 | [diff] [blame] | 5817 | if (ret > 0) { |
| 5818 | total += ret; |
| 5819 | count -= ret; |
| 5820 | if (ret < bsize) |
| 5821 | goto done; |
| 5822 | } |
| 5823 | break; |
| 5824 | |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5825 | case HTX_BLK_DATA: |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5826 | case HTX_BLK_EOM: |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5827 | /* all these cause the emission of a DATA frame (possibly empty). |
| 5828 | * This EOM necessarily is one before trailers, as the EOM following |
| 5829 | * trailers would have been consumed by the trailers parser. |
| 5830 | */ |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5831 | ret = h2s_frt_make_resp_data(h2s, buf, count); |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5832 | if (ret > 0) { |
Willy Tarreau | 98de12a | 2018-12-12 07:03:00 +0100 | [diff] [blame] | 5833 | htx = htx_from_buf(buf); |
Willy Tarreau | 0c535fd | 2018-12-01 19:25:56 +0100 | [diff] [blame] | 5834 | total += ret; |
| 5835 | count -= ret; |
| 5836 | if (ret < bsize) |
| 5837 | goto done; |
| 5838 | } |
| 5839 | break; |
| 5840 | |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5841 | case HTX_BLK_TLR: |
Christopher Faulet | 2d7c539 | 2019-06-03 10:41:26 +0200 | [diff] [blame] | 5842 | case HTX_BLK_EOT: |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5843 | /* This is the first trailers block, all the subsequent ones AND |
| 5844 | * the EOM will be swallowed by the parser. |
| 5845 | */ |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5846 | ret = h2s_make_trailers(h2s, htx); |
Willy Tarreau | 1bb812f | 2019-01-04 10:56:26 +0100 | [diff] [blame] | 5847 | if (ret > 0) { |
| 5848 | total += ret; |
| 5849 | count -= ret; |
| 5850 | if (ret < bsize) |
| 5851 | goto done; |
| 5852 | } |
| 5853 | break; |
| 5854 | |
Willy Tarreau | bcd3bb3 | 2018-12-01 18:59:00 +0100 | [diff] [blame] | 5855 | default: |
| 5856 | htx_remove_blk(htx, blk); |
| 5857 | total += bsize; |
| 5858 | count -= bsize; |
| 5859 | break; |
Willy Tarreau | bcd3bb3 | 2018-12-01 18:59:00 +0100 | [diff] [blame] | 5860 | } |
Willy Tarreau | bcd3bb3 | 2018-12-01 18:59:00 +0100 | [diff] [blame] | 5861 | } |
| 5862 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5863 | done: |
Willy Tarreau | 2b77848 | 2019-05-06 15:00:22 +0200 | [diff] [blame] | 5864 | if (h2s->st >= H2_SS_HLOC) { |
Willy Tarreau | 0061096 | 2018-07-19 10:58:28 +0200 | [diff] [blame] | 5865 | /* trim any possibly pending data after we close (extra CR-LF, |
| 5866 | * unprocessed trailers, abnormal extra data, ...) |
| 5867 | */ |
Willy Tarreau | 0bad043 | 2018-06-14 16:54:01 +0200 | [diff] [blame] | 5868 | total += count; |
| 5869 | count = 0; |
Willy Tarreau | 0061096 | 2018-07-19 10:58:28 +0200 | [diff] [blame] | 5870 | } |
| 5871 | |
Willy Tarreau | c6795ca | 2017-11-07 09:43:06 +0100 | [diff] [blame] | 5872 | /* RST are sent similarly to frame acks */ |
Willy Tarreau | 0249219 | 2017-12-07 15:59:29 +0100 | [diff] [blame] | 5873 | if (h2s->st == H2_SS_ERROR || h2s->flags & H2_SF_RST_RCVD) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5874 | TRACE_DEVEL("reporting RST/error to the app-layer stream", H2_EV_H2S_SEND|H2_EV_H2S_ERR|H2_EV_STRM_ERR, h2s->h2c->conn, h2s); |
Willy Tarreau | ec988c7 | 2018-12-19 18:00:29 +0100 | [diff] [blame] | 5875 | cs_set_error(cs); |
Willy Tarreau | 8c0ea7d | 2017-11-10 10:05:24 +0100 | [diff] [blame] | 5876 | if (h2s_send_rst_stream(h2s->h2c, h2s) > 0) |
Willy Tarreau | 00dd078 | 2018-03-01 16:31:34 +0100 | [diff] [blame] | 5877 | h2s_close(h2s); |
Willy Tarreau | c6795ca | 2017-11-07 09:43:06 +0100 | [diff] [blame] | 5878 | } |
| 5879 | |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 5880 | htx_to_buf(htx, buf); |
Olivier Houchard | d846c26 | 2018-10-19 17:24:29 +0200 | [diff] [blame] | 5881 | |
Olivier Houchard | 7505f94 | 2018-08-21 18:10:44 +0200 | [diff] [blame] | 5882 | if (total > 0) { |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 5883 | if (!(h2s->h2c->wait_event.events & SUB_RETRY_SEND)) |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5884 | TRACE_DEVEL("data queued, waking up h2c sender", H2_EV_H2S_SEND|H2_EV_H2C_SEND, h2s->h2c->conn, h2s); |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 5885 | tasklet_wakeup(h2s->h2c->wait_event.tasklet); |
Olivier Houchard | d846c26 | 2018-10-19 17:24:29 +0200 | [diff] [blame] | 5886 | |
Olivier Houchard | 7505f94 | 2018-08-21 18:10:44 +0200 | [diff] [blame] | 5887 | } |
Olivier Houchard | 6dea2ee | 2018-12-19 18:16:17 +0100 | [diff] [blame] | 5888 | /* If we're waiting for flow control, and we got a shutr on the |
| 5889 | * connection, we will never be unlocked, so add an error on |
| 5890 | * the conn_stream. |
| 5891 | */ |
| 5892 | if (conn_xprt_read0_pending(h2s->h2c->conn) && |
| 5893 | !b_data(&h2s->h2c->dbuf) && |
| 5894 | (h2s->flags & (H2_SF_BLK_SFCTL | H2_SF_BLK_MFCTL))) { |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5895 | TRACE_DEVEL("fctl with shutr, reporting error to app-layer", H2_EV_H2S_SEND|H2_EV_STRM_SEND|H2_EV_STRM_ERR, h2s->h2c->conn, h2s); |
Olivier Houchard | 6dea2ee | 2018-12-19 18:16:17 +0100 | [diff] [blame] | 5896 | if (cs->flags & CS_FL_EOS) |
| 5897 | cs->flags |= CS_FL_ERROR; |
| 5898 | else |
| 5899 | cs->flags |= CS_FL_ERR_PENDING; |
| 5900 | } |
Willy Tarreau | 9edf6db | 2019-10-02 10:49:59 +0200 | [diff] [blame] | 5901 | |
Willy Tarreau | 5723f29 | 2020-01-10 15:16:57 +0100 | [diff] [blame] | 5902 | if (total > 0 && !(h2s->flags & H2_SF_BLK_SFCTL) && |
| 5903 | !(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) { |
Willy Tarreau | 9edf6db | 2019-10-02 10:49:59 +0200 | [diff] [blame] | 5904 | /* Ok we managed to send something, leave the send_list if we were still there */ |
Olivier Houchard | d360ac6 | 2019-03-22 17:37:16 +0100 | [diff] [blame] | 5905 | LIST_DEL_INIT(&h2s->list); |
| 5906 | } |
Willy Tarreau | 9edf6db | 2019-10-02 10:49:59 +0200 | [diff] [blame] | 5907 | |
Willy Tarreau | 7838a79 | 2019-08-12 18:42:03 +0200 | [diff] [blame] | 5908 | TRACE_LEAVE(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s); |
Willy Tarreau | 9e5ae1d | 2017-10-17 19:58:20 +0200 | [diff] [blame] | 5909 | return total; |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 5910 | } |
| 5911 | |
Willy Tarreau | e3f36cd | 2018-03-30 14:43:13 +0200 | [diff] [blame] | 5912 | /* for debugging with CLI's "show fd" command */ |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 5913 | static void h2_show_fd(struct buffer *msg, struct connection *conn) |
Willy Tarreau | e3f36cd | 2018-03-30 14:43:13 +0200 | [diff] [blame] | 5914 | { |
Willy Tarreau | 3d2ee55 | 2018-12-19 14:12:10 +0100 | [diff] [blame] | 5915 | struct h2c *h2c = conn->ctx; |
Willy Tarreau | 987c063 | 2018-12-18 10:32:05 +0100 | [diff] [blame] | 5916 | struct h2s *h2s = NULL; |
Willy Tarreau | e3f36cd | 2018-03-30 14:43:13 +0200 | [diff] [blame] | 5917 | struct eb32_node *node; |
| 5918 | int fctl_cnt = 0; |
| 5919 | int send_cnt = 0; |
| 5920 | int tree_cnt = 0; |
| 5921 | int orph_cnt = 0; |
Willy Tarreau | 60f6268 | 2019-05-26 11:32:27 +0200 | [diff] [blame] | 5922 | struct buffer *hmbuf, *tmbuf; |
Willy Tarreau | e3f36cd | 2018-03-30 14:43:13 +0200 | [diff] [blame] | 5923 | |
| 5924 | if (!h2c) |
| 5925 | return; |
| 5926 | |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 5927 | list_for_each_entry(h2s, &h2c->fctl_list, list) |
Willy Tarreau | e3f36cd | 2018-03-30 14:43:13 +0200 | [diff] [blame] | 5928 | fctl_cnt++; |
| 5929 | |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 5930 | list_for_each_entry(h2s, &h2c->send_list, list) |
Willy Tarreau | e3f36cd | 2018-03-30 14:43:13 +0200 | [diff] [blame] | 5931 | send_cnt++; |
| 5932 | |
Willy Tarreau | 3af3771 | 2018-12-18 14:34:41 +0100 | [diff] [blame] | 5933 | h2s = NULL; |
Willy Tarreau | e3f36cd | 2018-03-30 14:43:13 +0200 | [diff] [blame] | 5934 | node = eb32_first(&h2c->streams_by_id); |
| 5935 | while (node) { |
| 5936 | h2s = container_of(node, struct h2s, by_id); |
| 5937 | tree_cnt++; |
| 5938 | if (!h2s->cs) |
| 5939 | orph_cnt++; |
| 5940 | node = eb32_next(node); |
| 5941 | } |
| 5942 | |
Willy Tarreau | 60f6268 | 2019-05-26 11:32:27 +0200 | [diff] [blame] | 5943 | hmbuf = br_head(h2c->mbuf); |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5944 | tmbuf = br_tail(h2c->mbuf); |
Willy Tarreau | ab2ec45 | 2019-08-30 07:07:08 +0200 | [diff] [blame] | 5945 | chunk_appendf(msg, " h2c.st0=%s .err=%d .maxid=%d .lastid=%d .flg=0x%04x" |
Willy Tarreau | 987c063 | 2018-12-18 10:32:05 +0100 | [diff] [blame] | 5946 | " .nbst=%u .nbcs=%u .fctl_cnt=%d .send_cnt=%d .tree_cnt=%d" |
Willy Tarreau | 60f6268 | 2019-05-26 11:32:27 +0200 | [diff] [blame] | 5947 | " .orph_cnt=%d .sub=%d .dsi=%d .dbuf=%u@%p+%u/%u .msi=%d" |
| 5948 | " .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]", |
Willy Tarreau | ab2ec45 | 2019-08-30 07:07:08 +0200 | [diff] [blame] | 5949 | h2c_st_to_str(h2c->st0), h2c->errcode, h2c->max_id, h2c->last_sid, h2c->flags, |
Willy Tarreau | 616ac81 | 2018-07-24 14:12:42 +0200 | [diff] [blame] | 5950 | h2c->nb_streams, h2c->nb_cs, fctl_cnt, send_cnt, tree_cnt, orph_cnt, |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 5951 | h2c->wait_event.events, h2c->dsi, |
Willy Tarreau | 987c063 | 2018-12-18 10:32:05 +0100 | [diff] [blame] | 5952 | (unsigned int)b_data(&h2c->dbuf), b_orig(&h2c->dbuf), |
| 5953 | (unsigned int)b_head_ofs(&h2c->dbuf), (unsigned int)b_size(&h2c->dbuf), |
| 5954 | h2c->msi, |
Willy Tarreau | 60f6268 | 2019-05-26 11:32:27 +0200 | [diff] [blame] | 5955 | br_head_idx(h2c->mbuf), br_tail_idx(h2c->mbuf), br_size(h2c->mbuf), |
| 5956 | (unsigned int)b_data(hmbuf), b_orig(hmbuf), |
| 5957 | (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf), |
Willy Tarreau | bcc4595 | 2019-05-26 10:05:50 +0200 | [diff] [blame] | 5958 | (unsigned int)b_data(tmbuf), b_orig(tmbuf), |
| 5959 | (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf)); |
Willy Tarreau | 987c063 | 2018-12-18 10:32:05 +0100 | [diff] [blame] | 5960 | |
| 5961 | if (h2s) { |
Willy Tarreau | ab2ec45 | 2019-08-30 07:07:08 +0200 | [diff] [blame] | 5962 | chunk_appendf(msg, " last_h2s=%p .id=%d .st=%s.flg=0x%04x .rxbuf=%u@%p+%u/%u .cs=%p", |
| 5963 | h2s, h2s->id, h2s_st_to_str(h2s->st), h2s->flags, |
Willy Tarreau | 987c063 | 2018-12-18 10:32:05 +0100 | [diff] [blame] | 5964 | (unsigned int)b_data(&h2s->rxbuf), b_orig(&h2s->rxbuf), |
| 5965 | (unsigned int)b_head_ofs(&h2s->rxbuf), (unsigned int)b_size(&h2s->rxbuf), |
| 5966 | h2s->cs); |
| 5967 | if (h2s->cs) |
| 5968 | chunk_appendf(msg, " .cs.flg=0x%08x .cs.data=%p", |
| 5969 | h2s->cs->flags, h2s->cs->data); |
| 5970 | } |
Willy Tarreau | e3f36cd | 2018-03-30 14:43:13 +0200 | [diff] [blame] | 5971 | } |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 5972 | |
| 5973 | /*******************************************************/ |
| 5974 | /* functions below are dedicated to the config parsers */ |
| 5975 | /*******************************************************/ |
| 5976 | |
Willy Tarreau | fe20e5b | 2017-07-27 11:42:14 +0200 | [diff] [blame] | 5977 | /* config parser for global "tune.h2.header-table-size" */ |
| 5978 | static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx, |
| 5979 | struct proxy *defpx, const char *file, int line, |
| 5980 | char **err) |
| 5981 | { |
| 5982 | if (too_many_args(1, args, err, NULL)) |
| 5983 | return -1; |
| 5984 | |
| 5985 | h2_settings_header_table_size = atoi(args[1]); |
| 5986 | if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) { |
| 5987 | memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]); |
| 5988 | return -1; |
| 5989 | } |
| 5990 | return 0; |
| 5991 | } |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 5992 | |
Willy Tarreau | e6baec0 | 2017-07-27 11:45:11 +0200 | [diff] [blame] | 5993 | /* config parser for global "tune.h2.initial-window-size" */ |
| 5994 | static int h2_parse_initial_window_size(char **args, int section_type, struct proxy *curpx, |
| 5995 | struct proxy *defpx, const char *file, int line, |
| 5996 | char **err) |
| 5997 | { |
| 5998 | if (too_many_args(1, args, err, NULL)) |
| 5999 | return -1; |
| 6000 | |
| 6001 | h2_settings_initial_window_size = atoi(args[1]); |
| 6002 | if (h2_settings_initial_window_size < 0) { |
| 6003 | memprintf(err, "'%s' expects a positive numeric value.", args[0]); |
| 6004 | return -1; |
| 6005 | } |
| 6006 | return 0; |
| 6007 | } |
| 6008 | |
Willy Tarreau | 5242ef8 | 2017-07-27 11:47:28 +0200 | [diff] [blame] | 6009 | /* config parser for global "tune.h2.max-concurrent-streams" */ |
| 6010 | static int h2_parse_max_concurrent_streams(char **args, int section_type, struct proxy *curpx, |
| 6011 | struct proxy *defpx, const char *file, int line, |
| 6012 | char **err) |
| 6013 | { |
| 6014 | if (too_many_args(1, args, err, NULL)) |
| 6015 | return -1; |
| 6016 | |
| 6017 | h2_settings_max_concurrent_streams = atoi(args[1]); |
Willy Tarreau | 5a490b6 | 2019-01-31 10:39:51 +0100 | [diff] [blame] | 6018 | if ((int)h2_settings_max_concurrent_streams < 0) { |
Willy Tarreau | 5242ef8 | 2017-07-27 11:47:28 +0200 | [diff] [blame] | 6019 | memprintf(err, "'%s' expects a positive numeric value.", args[0]); |
| 6020 | return -1; |
| 6021 | } |
| 6022 | return 0; |
| 6023 | } |
| 6024 | |
Willy Tarreau | a24b35c | 2019-02-21 13:24:36 +0100 | [diff] [blame] | 6025 | /* config parser for global "tune.h2.max-frame-size" */ |
| 6026 | static int h2_parse_max_frame_size(char **args, int section_type, struct proxy *curpx, |
| 6027 | struct proxy *defpx, const char *file, int line, |
| 6028 | char **err) |
| 6029 | { |
| 6030 | if (too_many_args(1, args, err, NULL)) |
| 6031 | return -1; |
| 6032 | |
| 6033 | h2_settings_max_frame_size = atoi(args[1]); |
| 6034 | if (h2_settings_max_frame_size < 16384 || h2_settings_max_frame_size > 16777215) { |
| 6035 | memprintf(err, "'%s' expects a numeric value between 16384 and 16777215.", args[0]); |
| 6036 | return -1; |
| 6037 | } |
| 6038 | return 0; |
| 6039 | } |
| 6040 | |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 6041 | |
| 6042 | /****************************************/ |
| 6043 | /* MUX initialization and instanciation */ |
| 6044 | /***************************************/ |
| 6045 | |
| 6046 | /* The mux operations */ |
Willy Tarreau | 680b2bd | 2018-11-27 07:30:17 +0100 | [diff] [blame] | 6047 | static const struct mux_ops h2_ops = { |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 6048 | .init = h2_init, |
Olivier Houchard | 21df6cc | 2018-09-14 23:21:44 +0200 | [diff] [blame] | 6049 | .wake = h2_wake, |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 6050 | .snd_buf = h2_snd_buf, |
Olivier Houchard | 511efea | 2018-08-16 15:30:32 +0200 | [diff] [blame] | 6051 | .rcv_buf = h2_rcv_buf, |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 6052 | .subscribe = h2_subscribe, |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 6053 | .unsubscribe = h2_unsubscribe, |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 6054 | .attach = h2_attach, |
Willy Tarreau | fafd398 | 2018-11-18 21:29:20 +0100 | [diff] [blame] | 6055 | .get_first_cs = h2_get_first_cs, |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 6056 | .detach = h2_detach, |
Olivier Houchard | 060ed43 | 2018-11-06 16:32:42 +0100 | [diff] [blame] | 6057 | .destroy = h2_destroy, |
Olivier Houchard | d540b36 | 2018-11-05 18:37:53 +0100 | [diff] [blame] | 6058 | .avail_streams = h2_avail_streams, |
Willy Tarreau | 00f18a3 | 2019-01-26 12:19:01 +0100 | [diff] [blame] | 6059 | .used_streams = h2_used_streams, |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 6060 | .shutr = h2_shutr, |
| 6061 | .shutw = h2_shutw, |
Olivier Houchard | 9b8e11e | 2019-10-25 16:19:26 +0200 | [diff] [blame] | 6062 | .ctl = h2_ctl, |
Willy Tarreau | e3f36cd | 2018-03-30 14:43:13 +0200 | [diff] [blame] | 6063 | .show_fd = h2_show_fd, |
Christopher Faulet | 9b79a10 | 2019-07-15 11:22:56 +0200 | [diff] [blame] | 6064 | .flags = MX_FL_CLEAN_ABRT|MX_FL_HTX, |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 6065 | .name = "H2", |
| 6066 | }; |
| 6067 | |
Christopher Faulet | 32f61c0 | 2018-04-10 14:33:41 +0200 | [diff] [blame] | 6068 | static struct mux_proto_list mux_proto_h2 = |
Christopher Faulet | c985f6c | 2019-07-15 11:42:52 +0200 | [diff] [blame] | 6069 | { .token = IST("h2"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BOTH, .mux = &h2_ops }; |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 6070 | |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 6071 | INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2); |
| 6072 | |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 6073 | /* config keyword parsers */ |
| 6074 | static struct cfg_kw_list cfg_kws = {ILH, { |
Willy Tarreau | fe20e5b | 2017-07-27 11:42:14 +0200 | [diff] [blame] | 6075 | { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size }, |
Willy Tarreau | e6baec0 | 2017-07-27 11:45:11 +0200 | [diff] [blame] | 6076 | { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size }, |
Willy Tarreau | 5242ef8 | 2017-07-27 11:47:28 +0200 | [diff] [blame] | 6077 | { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams }, |
Willy Tarreau | a24b35c | 2019-02-21 13:24:36 +0100 | [diff] [blame] | 6078 | { CFG_GLOBAL, "tune.h2.max-frame-size", h2_parse_max_frame_size }, |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 6079 | { 0, NULL, NULL } |
| 6080 | }}; |
| 6081 | |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 6082 | INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws); |