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Willy Tarreau62f52692017-10-08 23:01:42 +02001/*
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 Tarreauafba57a2018-12-11 13:44:24 +010015#include <common/h1.h>
Willy Tarreau5ab6b572017-09-22 08:05:00 +020016#include <common/h2.h>
Willy Tarreau13278b42017-10-13 19:23:14 +020017#include <common/hpack-dec.h>
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +020018#include <common/hpack-enc.h>
Willy Tarreau5ab6b572017-09-22 08:05:00 +020019#include <common/hpack-tbl.h>
Willy Tarreaub96b77e2018-12-11 10:22:41 +010020#include <common/htx.h>
Willy Tarreau0108d902018-11-25 19:14:37 +010021#include <common/initcall.h>
Willy Tarreaue4820742017-07-27 13:37:23 +020022#include <common/net_helper.h>
Willy Tarreau62f52692017-10-08 23:01:42 +020023#include <proto/connection.h>
Willy Tarreaubcd3bb32018-12-01 18:59:00 +010024#include <proto/http_htx.h>
Willy Tarreau12ae2122019-08-08 18:23:12 +020025#include <proto/trace.h>
Olivier Houchard44d59142018-12-13 18:46:22 +010026#include <proto/session.h>
Willy Tarreau62f52692017-10-08 23:01:42 +020027#include <proto/stream.h>
Olivier Houchard44d59142018-12-13 18:46:22 +010028#include <proto/stream_interface.h>
Willy Tarreauea392822017-10-31 10:02:25 +010029#include <types/session.h>
Willy Tarreau5ab6b572017-09-22 08:05:00 +020030#include <eb32tree.h>
Willy Tarreau62f52692017-10-08 23:01:42 +020031
32
Willy Tarreauecb9dcd2019-01-03 12:00:17 +010033/* dummy streams returned for closed, error, refused, idle and states */
Willy Tarreau2a856182017-05-16 15:20:39 +020034static const struct h2s *h2_closed_stream;
Willy Tarreauecb9dcd2019-01-03 12:00:17 +010035static const struct h2s *h2_error_stream;
Willy Tarreau8d0d58b2018-12-23 18:29:12 +010036static const struct h2s *h2_refused_stream;
Willy Tarreau2a856182017-05-16 15:20:39 +020037static const struct h2s *h2_idle_stream;
38
Willy Tarreau5ab6b572017-09-22 08:05:00 +020039/* Connection flags (32 bit), in h2c->flags */
40#define H2_CF_NONE 0x00000000
41
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020042/* 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 Tarreau315d8072017-12-10 22:17:57 +010047/* 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 Tarreau2e5b60e2017-09-25 11:49:03 +020052#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 Tarreau315d8072017-12-10 22:17:57 +010054
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020055#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 Tarreauf2101912018-07-19 10:11:38 +020059#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 Tarreau2e5b60e2017-09-25 11:49:03 +020061
Willy Tarreau081d4722017-05-16 21:51:05 +020062/* other flags */
Willy Tarreauf2101912018-07-19 10:11:38 +020063#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 Tarreaub3fb56d2018-10-03 13:56:38 +020066#define H2_CF_IS_BACK 0x00008000 // this is an outgoing connection
Willy Tarreau97aaa672018-12-23 09:49:04 +010067#define H2_CF_WINDOW_OPENED 0x00010000 // demux increased window already advertised
Willy Tarreau081d4722017-05-16 21:51:05 +020068
Willy Tarreau5ab6b572017-09-22 08:05:00 +020069/* H2 connection state, in h2c->st0 */
70enum 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 Tarreaua20a5192017-12-27 11:02:06 +010075 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 Tarreau5ab6b572017-09-22 08:05:00 +020077 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 Tarreau51330962019-05-26 09:38:07 +020082
Willy Tarreau9c218e72019-05-26 10:08:28 +020083/* 32 buffers: one for the ring's root, rest for the mbuf itself */
84#define H2C_MBUF_CNT 32
Willy Tarreau51330962019-05-26 09:38:07 +020085
Willy Tarreau5ab6b572017-09-22 08:05:00 +020086/* H2 connection descriptor */
87struct 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 Tarreau2e2083a2019-01-31 10:34:07 +010095 uint32_t streams_limit; /* maximum number of concurrent streams the peer supports */
Willy Tarreau5ab6b572017-09-22 08:05:00 +020096 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 Tarreauc9fa0482018-07-10 17:43:27 +0200102 struct buffer dbuf; /* demux buffer */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200103
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 Tarreau05e5daf2017-12-11 15:17:36 +0100108 uint8_t dpl; /* demux pad length (part of dfl), init to 0 */
109 /* 8 bit hole here */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200110 int32_t last_sid; /* last processed stream ID for GOAWAY, <0 before preface */
111
112 /* states for the mux direction */
Willy Tarreau51330962019-05-26 09:38:07 +0200113 struct buffer mbuf[H2C_MBUF_CNT]; /* mux buffers (ring) */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200114 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 Tarreauea392822017-10-31 10:02:25 +0100123 int timeout; /* idle timeout duration in ticks */
Willy Tarreau599391a2017-11-24 10:16:00 +0100124 int shut_timeout; /* idle timeout duration in ticks after GOAWAY was sent */
Willy Tarreau49745612017-12-03 18:56:02 +0100125 unsigned int nb_streams; /* number of streams in the tree */
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200126 unsigned int nb_cs; /* number of attached conn_streams */
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100127 unsigned int nb_reserved; /* number of reserved streams */
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100128 unsigned int stream_cnt; /* total number of streams seen */
Willy Tarreau0b37d652018-10-03 10:33:02 +0200129 struct proxy *proxy; /* the proxy this connection was created for */
Willy Tarreauea392822017-10-31 10:02:25 +0100130 struct task *task; /* timeout management task */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200131 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 Tarreau9edf6db2019-10-02 10:49:59 +0200134 struct list blocked_list; /* list of streams blocked for other reasons (e.g. sfctl, dep) */
Olivier Houchardd846c262018-10-19 17:24:29 +0200135 struct list sending_list; /* list of h2s scheduled to send data */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100136 struct buffer_wait buf_wait; /* wait list for buffer allocations */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200137 struct wait_event wait_event; /* To be used if we're waiting for I/Os */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200138};
139
Willy Tarreau18312642017-10-11 07:57:07 +0200140/* H2 stream state, in h2s->st */
141enum h2_ss {
142 H2_SS_IDLE = 0, // idle
143 H2_SS_RLOC, // reserved(local)
144 H2_SS_RREM, // reserved(remote)
145 H2_SS_OPEN, // open
146 H2_SS_HREM, // half-closed(remote)
147 H2_SS_HLOC, // half-closed(local)
Willy Tarreau96060ba2017-10-16 18:34:34 +0200148 H2_SS_ERROR, // an error needs to be sent using RST_STREAM
Willy Tarreau18312642017-10-11 07:57:07 +0200149 H2_SS_CLOSED, // closed
150 H2_SS_ENTRIES // must be last
151} __attribute__((packed));
152
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200153#define H2_SS_MASK(state) (1UL << (state))
154#define H2_SS_IDLE_BIT (1UL << H2_SS_IDLE)
155#define H2_SS_RLOC_BIT (1UL << H2_SS_RLOC)
156#define H2_SS_RREM_BIT (1UL << H2_SS_RREM)
157#define H2_SS_OPEN_BIT (1UL << H2_SS_OPEN)
158#define H2_SS_HREM_BIT (1UL << H2_SS_HREM)
159#define H2_SS_HLOC_BIT (1UL << H2_SS_HLOC)
160#define H2_SS_ERROR_BIT (1UL << H2_SS_ERROR)
161#define H2_SS_CLOSED_BIT (1UL << H2_SS_CLOSED)
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200162
Willy Tarreau18312642017-10-11 07:57:07 +0200163/* HTTP/2 stream flags (32 bit), in h2s->flags */
164#define H2_SF_NONE 0x00000000
165#define H2_SF_ES_RCVD 0x00000001
166#define H2_SF_ES_SENT 0x00000002
167
168#define H2_SF_RST_RCVD 0x00000004 // received RST_STREAM
169#define H2_SF_RST_SENT 0x00000008 // sent RST_STREAM
170
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200171/* stream flags indicating the reason the stream is blocked */
172#define H2_SF_BLK_MBUSY 0x00000010 // blocked waiting for mux access (transient)
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200173#define H2_SF_BLK_MROOM 0x00000020 // blocked waiting for room in the mux (must be in send list)
174#define H2_SF_BLK_MFCTL 0x00000040 // blocked due to mux fctl (must be in fctl list)
175#define H2_SF_BLK_SFCTL 0x00000080 // blocked due to stream fctl (must be in blocked list)
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200176#define H2_SF_BLK_ANY 0x000000F0 // any of the reasons above
177
Willy Tarreau454f9052017-10-26 19:40:35 +0200178/* stream flags indicating how data is supposed to be sent */
179#define H2_SF_DATA_CLEN 0x00000100 // data sent using content-length
Willy Tarreau454f9052017-10-26 19:40:35 +0200180
Christopher Faulet3e395632019-09-13 09:37:21 +0200181/* unused flags: 0x00000200, 0x00000400, 0x00000800 */
Willy Tarreau454f9052017-10-26 19:40:35 +0200182
Willy Tarreau67434202017-11-06 20:20:51 +0100183#define H2_SF_HEADERS_SENT 0x00001000 // a HEADERS frame was sent for this stream
Willy Tarreauc4312d32017-11-07 12:01:53 +0100184#define H2_SF_OUTGOING_DATA 0x00002000 // set whenever we've seen outgoing data
Willy Tarreau67434202017-11-06 20:20:51 +0100185
Willy Tarreau6cc85a52019-01-02 15:49:20 +0100186#define H2_SF_HEADERS_RCVD 0x00004000 // a HEADERS frame was received for this stream
187
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200188#define H2_SF_WANT_SHUTR 0x00008000 // a stream couldn't shutr() (mux full/busy)
189#define H2_SF_WANT_SHUTW 0x00010000 // a stream couldn't shutw() (mux full/busy)
Willy Tarreau3cf69fe2019-05-14 10:44:40 +0200190#define H2_SF_KILL_CONN 0x00020000 // kill the whole connection with this stream
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200191
192
Willy Tarreau18312642017-10-11 07:57:07 +0200193/* H2 stream descriptor, describing the stream as it appears in the H2C, and as
194 * it is being processed in the internal HTTP representation (H1 for now).
195 */
196struct h2s {
197 struct conn_stream *cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +0100198 struct session *sess;
Willy Tarreau18312642017-10-11 07:57:07 +0200199 struct h2c *h2c;
Willy Tarreaua40704a2018-09-11 13:52:04 +0200200 struct h1m h1m; /* request or response parser state for H1 */
Willy Tarreau18312642017-10-11 07:57:07 +0200201 struct eb32_node by_id; /* place in h2c's streams_by_id */
Willy Tarreau18312642017-10-11 07:57:07 +0200202 int32_t id; /* stream ID */
203 uint32_t flags; /* H2_SF_* */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +0200204 int sws; /* stream window size, to be added to the mux's initial window size */
Willy Tarreau18312642017-10-11 07:57:07 +0200205 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
206 enum h2_ss st;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +0200207 uint16_t status; /* HTTP response status */
Willy Tarreau1915ca22019-01-24 11:49:37 +0100208 unsigned long long body_len; /* remaining body length according to content-length if H2_SF_DATA_CLEN */
Olivier Houchard638b7992018-08-16 15:41:52 +0200209 struct buffer rxbuf; /* receive buffer, always valid (buf_empty or real buffer) */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200210 struct wait_event wait_event; /* Wait list, when we're attempting to send a RST but we can't send */
Willy Tarreau749f5ca2019-03-21 19:19:36 +0100211 struct wait_event *recv_wait; /* recv wait_event the conn_stream associated is waiting on (via h2_subscribe) */
212 struct wait_event *send_wait; /* send wait_event the conn_stream associated is waiting on (via h2_subscribe) */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200213 struct list list; /* To be used when adding in h2c->send_list or h2c->fctl_lsit */
Olivier Houchardd360ac62019-03-22 17:37:16 +0100214 struct list sending_list; /* To be used when adding in h2c->sending_list */
Willy Tarreau18312642017-10-11 07:57:07 +0200215};
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200216
Willy Tarreauc6405142017-09-21 20:23:50 +0200217/* descriptor for an h2 frame header */
218struct h2_fh {
219 uint32_t len; /* length, host order, 24 bits */
220 uint32_t sid; /* stream id, host order, 31 bits */
221 uint8_t ft; /* frame type */
222 uint8_t ff; /* frame flags */
223};
224
Willy Tarreau12ae2122019-08-08 18:23:12 +0200225/* trace source and events */
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200226static void h2_trace(enum trace_level level, uint64_t mask, \
227 const struct trace_source *src,
228 const struct ist where, const struct ist func,
229 const void *a1, const void *a2, const void *a3, const void *a4);
Willy Tarreau12ae2122019-08-08 18:23:12 +0200230
231/* The event representation is split like this :
232 * strm - application layer
233 * h2s - internal H2 stream
234 * h2c - internal H2 connection
235 * conn - external connection
236 *
237 */
238static const struct trace_event h2_trace_events[] = {
239#define H2_EV_H2C_NEW (1ULL << 0)
Willy Tarreau87951942019-08-30 07:34:36 +0200240 { .mask = H2_EV_H2C_NEW, .name = "h2c_new", .desc = "new H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200241#define H2_EV_H2C_RECV (1ULL << 1)
Willy Tarreau87951942019-08-30 07:34:36 +0200242 { .mask = H2_EV_H2C_RECV, .name = "h2c_recv", .desc = "Rx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200243#define H2_EV_H2C_SEND (1ULL << 2)
Willy Tarreau87951942019-08-30 07:34:36 +0200244 { .mask = H2_EV_H2C_SEND, .name = "h2c_send", .desc = "Tx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200245#define H2_EV_H2C_FCTL (1ULL << 3)
Willy Tarreau87951942019-08-30 07:34:36 +0200246 { .mask = H2_EV_H2C_FCTL, .name = "h2c_fctl", .desc = "H2 connection flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200247#define H2_EV_H2C_BLK (1ULL << 4)
Willy Tarreau87951942019-08-30 07:34:36 +0200248 { .mask = H2_EV_H2C_BLK, .name = "h2c_blk", .desc = "H2 connection blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200249#define H2_EV_H2C_WAKE (1ULL << 5)
Willy Tarreau87951942019-08-30 07:34:36 +0200250 { .mask = H2_EV_H2C_WAKE, .name = "h2c_wake", .desc = "H2 connection woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200251#define H2_EV_H2C_END (1ULL << 6)
Willy Tarreau87951942019-08-30 07:34:36 +0200252 { .mask = H2_EV_H2C_END, .name = "h2c_end", .desc = "H2 connection terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200253#define H2_EV_H2C_ERR (1ULL << 7)
Willy Tarreau87951942019-08-30 07:34:36 +0200254 { .mask = H2_EV_H2C_ERR, .name = "h2c_err", .desc = "error on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200255#define H2_EV_RX_FHDR (1ULL << 8)
Willy Tarreau87951942019-08-30 07:34:36 +0200256 { .mask = H2_EV_RX_FHDR, .name = "rx_fhdr", .desc = "H2 frame header received" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200257#define H2_EV_RX_FRAME (1ULL << 9)
Willy Tarreau87951942019-08-30 07:34:36 +0200258 { .mask = H2_EV_RX_FRAME, .name = "rx_frame", .desc = "receipt of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200259#define H2_EV_RX_EOI (1ULL << 10)
Willy Tarreau87951942019-08-30 07:34:36 +0200260 { .mask = H2_EV_RX_EOI, .name = "rx_eoi", .desc = "receipt of end of H2 input (ES or RST)" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200261#define H2_EV_RX_PREFACE (1ULL << 11)
Willy Tarreau87951942019-08-30 07:34:36 +0200262 { .mask = H2_EV_RX_PREFACE, .name = "rx_preface", .desc = "receipt of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200263#define H2_EV_RX_DATA (1ULL << 12)
Willy Tarreau87951942019-08-30 07:34:36 +0200264 { .mask = H2_EV_RX_DATA, .name = "rx_data", .desc = "receipt of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200265#define H2_EV_RX_HDR (1ULL << 13)
Willy Tarreau87951942019-08-30 07:34:36 +0200266 { .mask = H2_EV_RX_HDR, .name = "rx_hdr", .desc = "receipt of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200267#define H2_EV_RX_PRIO (1ULL << 14)
Willy Tarreau87951942019-08-30 07:34:36 +0200268 { .mask = H2_EV_RX_PRIO, .name = "rx_prio", .desc = "receipt of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200269#define H2_EV_RX_RST (1ULL << 15)
Willy Tarreau87951942019-08-30 07:34:36 +0200270 { .mask = H2_EV_RX_RST, .name = "rx_rst", .desc = "receipt of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200271#define H2_EV_RX_SETTINGS (1ULL << 16)
Willy Tarreau87951942019-08-30 07:34:36 +0200272 { .mask = H2_EV_RX_SETTINGS, .name = "rx_settings", .desc = "receipt of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200273#define H2_EV_RX_PUSH (1ULL << 17)
Willy Tarreau87951942019-08-30 07:34:36 +0200274 { .mask = H2_EV_RX_PUSH, .name = "rx_push", .desc = "receipt of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200275#define H2_EV_RX_PING (1ULL << 18)
Willy Tarreau87951942019-08-30 07:34:36 +0200276 { .mask = H2_EV_RX_PING, .name = "rx_ping", .desc = "receipt of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200277#define H2_EV_RX_GOAWAY (1ULL << 19)
Willy Tarreau87951942019-08-30 07:34:36 +0200278 { .mask = H2_EV_RX_GOAWAY, .name = "rx_goaway", .desc = "receipt of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200279#define H2_EV_RX_WU (1ULL << 20)
Willy Tarreau87951942019-08-30 07:34:36 +0200280 { .mask = H2_EV_RX_WU, .name = "rx_wu", .desc = "receipt of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200281#define H2_EV_RX_CONT (1ULL << 21)
Willy Tarreau87951942019-08-30 07:34:36 +0200282 { .mask = H2_EV_RX_CONT, .name = "rx_cont", .desc = "receipt of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200283#define H2_EV_TX_FRAME (1ULL << 22)
Willy Tarreau87951942019-08-30 07:34:36 +0200284 { .mask = H2_EV_TX_FRAME, .name = "tx_frame", .desc = "transmission of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200285#define H2_EV_TX_EOI (1ULL << 23)
Willy Tarreau87951942019-08-30 07:34:36 +0200286 { .mask = H2_EV_TX_EOI, .name = "tx_eoi", .desc = "transmission of H2 end of input (ES or RST)" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200287#define H2_EV_TX_PREFACE (1ULL << 24)
Willy Tarreau87951942019-08-30 07:34:36 +0200288 { .mask = H2_EV_TX_PREFACE, .name = "tx_preface", .desc = "transmission of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200289#define H2_EV_TX_DATA (1ULL << 25)
Willy Tarreau87951942019-08-30 07:34:36 +0200290 { .mask = H2_EV_TX_DATA, .name = "tx_data", .desc = "transmission of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200291#define H2_EV_TX_HDR (1ULL << 26)
Willy Tarreau87951942019-08-30 07:34:36 +0200292 { .mask = H2_EV_TX_HDR, .name = "tx_hdr", .desc = "transmission of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200293#define H2_EV_TX_PRIO (1ULL << 27)
Willy Tarreau87951942019-08-30 07:34:36 +0200294 { .mask = H2_EV_TX_PRIO, .name = "tx_prio", .desc = "transmission of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200295#define H2_EV_TX_RST (1ULL << 28)
Willy Tarreau87951942019-08-30 07:34:36 +0200296 { .mask = H2_EV_TX_RST, .name = "tx_rst", .desc = "transmission of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200297#define H2_EV_TX_SETTINGS (1ULL << 29)
Willy Tarreau87951942019-08-30 07:34:36 +0200298 { .mask = H2_EV_TX_SETTINGS, .name = "tx_settings", .desc = "transmission of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200299#define H2_EV_TX_PUSH (1ULL << 30)
Willy Tarreau87951942019-08-30 07:34:36 +0200300 { .mask = H2_EV_TX_PUSH, .name = "tx_push", .desc = "transmission of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200301#define H2_EV_TX_PING (1ULL << 31)
Willy Tarreau87951942019-08-30 07:34:36 +0200302 { .mask = H2_EV_TX_PING, .name = "tx_ping", .desc = "transmission of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200303#define H2_EV_TX_GOAWAY (1ULL << 32)
Willy Tarreau87951942019-08-30 07:34:36 +0200304 { .mask = H2_EV_TX_GOAWAY, .name = "tx_goaway", .desc = "transmission of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200305#define H2_EV_TX_WU (1ULL << 33)
Willy Tarreau87951942019-08-30 07:34:36 +0200306 { .mask = H2_EV_TX_WU, .name = "tx_wu", .desc = "transmission of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200307#define H2_EV_TX_CONT (1ULL << 34)
Willy Tarreau87951942019-08-30 07:34:36 +0200308 { .mask = H2_EV_TX_CONT, .name = "tx_cont", .desc = "transmission of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200309#define H2_EV_H2S_NEW (1ULL << 35)
Willy Tarreau87951942019-08-30 07:34:36 +0200310 { .mask = H2_EV_H2S_NEW, .name = "h2s_new", .desc = "new H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200311#define H2_EV_H2S_RECV (1ULL << 36)
Willy Tarreau87951942019-08-30 07:34:36 +0200312 { .mask = H2_EV_H2S_RECV, .name = "h2s_recv", .desc = "Rx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200313#define H2_EV_H2S_SEND (1ULL << 37)
Willy Tarreau87951942019-08-30 07:34:36 +0200314 { .mask = H2_EV_H2S_SEND, .name = "h2s_send", .desc = "Tx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200315#define H2_EV_H2S_FCTL (1ULL << 38)
Willy Tarreau87951942019-08-30 07:34:36 +0200316 { .mask = H2_EV_H2S_FCTL, .name = "h2s_fctl", .desc = "H2 stream flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200317#define H2_EV_H2S_BLK (1ULL << 39)
Willy Tarreau87951942019-08-30 07:34:36 +0200318 { .mask = H2_EV_H2S_BLK, .name = "h2s_blk", .desc = "H2 stream blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200319#define H2_EV_H2S_WAKE (1ULL << 40)
Willy Tarreau87951942019-08-30 07:34:36 +0200320 { .mask = H2_EV_H2S_WAKE, .name = "h2s_wake", .desc = "H2 stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200321#define H2_EV_H2S_END (1ULL << 41)
Willy Tarreau87951942019-08-30 07:34:36 +0200322 { .mask = H2_EV_H2S_END, .name = "h2s_end", .desc = "H2 stream terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200323#define H2_EV_H2S_ERR (1ULL << 42)
Willy Tarreau87951942019-08-30 07:34:36 +0200324 { .mask = H2_EV_H2S_ERR, .name = "h2s_err", .desc = "error on H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200325#define H2_EV_STRM_NEW (1ULL << 43)
Willy Tarreau87951942019-08-30 07:34:36 +0200326 { .mask = H2_EV_STRM_NEW, .name = "strm_new", .desc = "app-layer stream creation" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200327#define H2_EV_STRM_RECV (1ULL << 44)
Willy Tarreau87951942019-08-30 07:34:36 +0200328 { .mask = H2_EV_STRM_RECV, .name = "strm_recv", .desc = "receiving data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200329#define H2_EV_STRM_SEND (1ULL << 45)
Willy Tarreau87951942019-08-30 07:34:36 +0200330 { .mask = H2_EV_STRM_SEND, .name = "strm_send", .desc = "sending data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200331#define H2_EV_STRM_FULL (1ULL << 46)
Willy Tarreau87951942019-08-30 07:34:36 +0200332 { .mask = H2_EV_STRM_FULL, .name = "strm_full", .desc = "stream buffer full" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200333#define H2_EV_STRM_WAKE (1ULL << 47)
Willy Tarreau87951942019-08-30 07:34:36 +0200334 { .mask = H2_EV_STRM_WAKE, .name = "strm_wake", .desc = "stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200335#define H2_EV_STRM_SHUT (1ULL << 48)
Willy Tarreau87951942019-08-30 07:34:36 +0200336 { .mask = H2_EV_STRM_SHUT, .name = "strm_shut", .desc = "stream shutdown" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200337#define H2_EV_STRM_END (1ULL << 49)
Willy Tarreau87951942019-08-30 07:34:36 +0200338 { .mask = H2_EV_STRM_END, .name = "strm_end", .desc = "detaching app-layer stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200339#define H2_EV_STRM_ERR (1ULL << 50)
Willy Tarreau87951942019-08-30 07:34:36 +0200340 { .mask = H2_EV_STRM_ERR, .name = "strm_err", .desc = "stream error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200341#define H2_EV_PROTO_ERR (1ULL << 51)
Willy Tarreau87951942019-08-30 07:34:36 +0200342 { .mask = H2_EV_PROTO_ERR, .name = "proto_err", .desc = "protocol error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200343 { }
344};
345
346static const struct name_desc h2_trace_lockon_args[4] = {
347 /* arg1 */ { /* already used by the connection */ },
348 /* arg2 */ { .name="h2s", .desc="H2 stream" },
349 /* arg3 */ { },
350 /* arg4 */ { }
351};
352
353static const struct name_desc h2_trace_decoding[] = {
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200354#define H2_VERB_CLEAN 1
355 { .name="clean", .desc="only user-friendly stuff, generally suitable for level \"user\"" },
356#define H2_VERB_MINIMAL 2
Willy Tarreau12ae2122019-08-08 18:23:12 +0200357 { .name="minimal", .desc="report only h2c/h2s state and flags, no real decoding" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200358#define H2_VERB_SIMPLE 3
Willy Tarreau12ae2122019-08-08 18:23:12 +0200359 { .name="simple", .desc="add request/response status line or frame info when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200360#define H2_VERB_ADVANCED 4
Willy Tarreau12ae2122019-08-08 18:23:12 +0200361 { .name="advanced", .desc="add header fields or frame decoding when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200362#define H2_VERB_COMPLETE 5
Willy Tarreau12ae2122019-08-08 18:23:12 +0200363 { .name="complete", .desc="add full data dump when available" },
364 { /* end */ }
365};
366
367static struct trace_source trace_h2 = {
368 .name = IST("h2"),
369 .desc = "HTTP/2 multiplexer",
370 .arg_def = TRC_ARG1_CONN, // TRACE()'s first argument is always a connection
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200371 .default_cb = h2_trace,
Willy Tarreau12ae2122019-08-08 18:23:12 +0200372 .known_events = h2_trace_events,
373 .lockon_args = h2_trace_lockon_args,
374 .decoding = h2_trace_decoding,
375 .report_events = ~0, // report everything by default
376};
377
378#define TRACE_SOURCE &trace_h2
379INITCALL1(STG_REGISTER, trace_register_source, TRACE_SOURCE);
380
Willy Tarreau8ceae722018-11-26 11:58:30 +0100381/* the h2c connection pool */
382DECLARE_STATIC_POOL(pool_head_h2c, "h2c", sizeof(struct h2c));
383
384/* the h2s stream pool */
385DECLARE_STATIC_POOL(pool_head_h2s, "h2s", sizeof(struct h2s));
386
Willy Tarreaudc572362018-12-12 08:08:05 +0100387/* The default connection window size is 65535, it may only be enlarged using
388 * a WINDOW_UPDATE message. Since the window must never be larger than 2G-1,
389 * we'll pretend we already received the difference between the two to send
390 * an equivalent window update to enlarge it to 2G-1.
391 */
392#define H2_INITIAL_WINDOW_INCREMENT ((1U<<31)-1 - 65535)
393
Willy Tarreau455d5682019-05-24 19:42:18 +0200394/* maximum amount of data we're OK with re-aligning for buffer optimizations */
395#define MAX_DATA_REALIGN 1024
396
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200397/* a few settings from the global section */
398static int h2_settings_header_table_size = 4096; /* initial value */
Willy Tarreaue6baec02017-07-27 11:45:11 +0200399static int h2_settings_initial_window_size = 65535; /* initial value */
Willy Tarreau5a490b62019-01-31 10:39:51 +0100400static unsigned int h2_settings_max_concurrent_streams = 100;
Willy Tarreaua24b35c2019-02-21 13:24:36 +0100401static int h2_settings_max_frame_size = 0; /* unset */
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200402
Willy Tarreau2a856182017-05-16 15:20:39 +0200403/* a dmumy closed stream */
404static const struct h2s *h2_closed_stream = &(const struct h2s){
405 .cs = NULL,
406 .h2c = NULL,
407 .st = H2_SS_CLOSED,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100408 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreauab837502017-12-27 15:07:30 +0100409 .flags = H2_SF_RST_RCVD,
Willy Tarreau2a856182017-05-16 15:20:39 +0200410 .id = 0,
411};
412
Willy Tarreauecb9dcd2019-01-03 12:00:17 +0100413/* a dmumy closed stream returning a PROTOCOL_ERROR error */
414static const struct h2s *h2_error_stream = &(const struct h2s){
415 .cs = NULL,
416 .h2c = NULL,
417 .st = H2_SS_CLOSED,
418 .errcode = H2_ERR_PROTOCOL_ERROR,
419 .flags = 0,
420 .id = 0,
421};
422
Willy Tarreau8d0d58b2018-12-23 18:29:12 +0100423/* a dmumy closed stream returning a REFUSED_STREAM error */
424static const struct h2s *h2_refused_stream = &(const struct h2s){
425 .cs = NULL,
426 .h2c = NULL,
427 .st = H2_SS_CLOSED,
428 .errcode = H2_ERR_REFUSED_STREAM,
429 .flags = 0,
430 .id = 0,
431};
432
Willy Tarreau2a856182017-05-16 15:20:39 +0200433/* and a dummy idle stream for use with any unannounced stream */
434static const struct h2s *h2_idle_stream = &(const struct h2s){
435 .cs = NULL,
436 .h2c = NULL,
437 .st = H2_SS_IDLE,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100438 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreau2a856182017-05-16 15:20:39 +0200439 .id = 0,
440};
441
Olivier Houchard9f6af332018-05-25 14:04:04 +0200442static struct task *h2_timeout_task(struct task *t, void *context, unsigned short state);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +0200443static int h2_send(struct h2c *h2c);
444static int h2_recv(struct h2c *h2c);
Olivier Houchard7505f942018-08-21 18:10:44 +0200445static int h2_process(struct h2c *h2c);
Olivier Houchard29fb89d2018-08-02 18:56:36 +0200446static struct task *h2_io_cb(struct task *t, void *ctx, unsigned short state);
Willy Tarreau0b559072018-02-26 15:22:17 +0100447static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id);
Willy Tarreau4790f7c2019-01-24 11:33:02 +0100448static int h2c_decode_headers(struct h2c *h2c, struct buffer *rxbuf, uint32_t *flags, unsigned long long *body_len);
Willy Tarreaua56a6de2018-02-26 15:59:07 +0100449static int h2_frt_transfer_data(struct h2s *h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +0200450static struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned short state);
Olivier Houchardf502aca2018-12-14 19:42:40 +0100451static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess);
Willy Tarreau8b2757c2018-12-19 17:36:48 +0100452static void h2s_alert(struct h2s *h2s);
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200453
Willy Tarreauab2ec452019-08-30 07:07:08 +0200454/* returns a h2c state as an abbreviated 3-letter string, or "???" if unknown */
455static inline const char *h2c_st_to_str(enum h2_cs st)
456{
457 switch (st) {
458 case H2_CS_PREFACE: return "PRF";
459 case H2_CS_SETTINGS1: return "STG";
460 case H2_CS_FRAME_H: return "FRH";
461 case H2_CS_FRAME_P: return "FRP";
462 case H2_CS_FRAME_A: return "FRA";
463 case H2_CS_FRAME_E: return "FRE";
464 case H2_CS_ERROR: return "ERR";
465 case H2_CS_ERROR2: return "ER2";
466 default: return "???";
467 }
468}
469
470/* returns a h2s state as an abbreviated 3-letter string, or "???" if unknown */
471static inline const char *h2s_st_to_str(enum h2_ss st)
472{
473 switch (st) {
474 case H2_SS_IDLE: return "IDL"; // idle
475 case H2_SS_RLOC: return "RSL"; // reserved local
476 case H2_SS_RREM: return "RSR"; // reserved remote
477 case H2_SS_OPEN: return "OPN"; // open
478 case H2_SS_HREM: return "HCR"; // half-closed remote
479 case H2_SS_HLOC: return "HCL"; // half-closed local
480 case H2_SS_ERROR : return "ERR"; // error
481 case H2_SS_CLOSED: return "CLO"; // closed
482 default: return "???";
483 }
484}
485
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200486/* the H2 traces always expect that arg1, if non-null, is of type connection
487 * (from which we can derive h2c), that arg2, if non-null, is of type h2s, and
488 * that arg3, if non-null, is either of type htx for tx headers, or of type
489 * buffer for everything else.
490 */
491static void h2_trace(enum trace_level level, uint64_t mask, const struct trace_source *src,
492 const struct ist where, const struct ist func,
493 const void *a1, const void *a2, const void *a3, const void *a4)
494{
495 const struct connection *conn = a1;
496 const struct h2c *h2c = conn ? conn->ctx : NULL;
497 const struct h2s *h2s = a2;
498 const struct buffer *buf = a3;
499 const struct htx *htx;
500 int pos;
501
502 if (!h2c) // nothing to add
503 return;
504
Willy Tarreau17104d42019-08-30 07:12:55 +0200505 if (src->verbosity > H2_VERB_CLEAN) {
Willy Tarreau73db4342019-09-25 07:28:44 +0200506 chunk_appendf(&trace_buf, " : h2c=%p(%c,%s)", h2c, conn_is_back(conn) ? 'B' : 'F', h2c_st_to_str(h2c->st0));
507
508 if (h2c->dsi >= 0 &&
509 (mask & (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) == (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) {
510 chunk_appendf(&trace_buf, " dft=%s/%02x", h2_ft_str(h2c->dft), h2c->dff);
511 }
512
513 if (h2s) {
514 if (h2s->id <= 0)
515 chunk_appendf(&trace_buf, " dsi=%d", h2c->dsi);
516 chunk_appendf(&trace_buf, " h2s=%p(%d,%s)", h2s, h2s->id, h2s_st_to_str(h2s->st));
517 }
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200518 }
519
520 /* Let's dump decoded requests and responses right after parsing. They
521 * are traced at level USER with a few recognizable flags.
522 */
523 if ((mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW) ||
524 mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR)) && buf)
525 htx = htxbuf(buf); // recv req/res
526 else if (mask == (H2_EV_TX_FRAME|H2_EV_TX_HDR))
527 htx = a3; // send req/res
528 else
529 htx = NULL;
530
Willy Tarreau94f1dcf2019-08-30 07:11:30 +0200531 if (level == TRACE_LEVEL_USER && src->verbosity != H2_VERB_MINIMAL && htx && (pos = htx_get_head(htx)) != -1) {
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200532 const struct htx_blk *blk = htx_get_blk(htx, pos);
533 const struct htx_sl *sl = htx_get_blk_ptr(htx, blk);
534 enum htx_blk_type type = htx_get_blk_type(blk);
535
536 if (type == HTX_BLK_REQ_SL)
537 chunk_appendf(&trace_buf, " : [%d] H2 REQ: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200538 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200539 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
540 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
541 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
542 else if (type == HTX_BLK_RES_SL)
543 chunk_appendf(&trace_buf, " : [%d] H2 RES: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200544 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200545 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
546 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
547 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
548 }
549}
550
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200551/* returns true if the connection is allowed to expire, false otherwise. A
552 * connection may expire when:
553 * - it has no stream
554 * - it has data in the mux buffer
555 * - it has streams in the blocked list
556 * - it has streams in the fctl list
557 * - it has streams in the send list
558 * Otherwise it means some streams are waiting in the data layer and it should
559 * not expire.
560 */
561static inline int h2c_may_expire(const struct h2c *h2c)
562{
563 return eb_is_empty(&h2c->streams_by_id) ||
564 br_data(h2c->mbuf) ||
565 !LIST_ISEMPTY(&h2c->blocked_list) ||
566 !LIST_ISEMPTY(&h2c->fctl_list) ||
567 !LIST_ISEMPTY(&h2c->send_list) ||
568 !LIST_ISEMPTY(&h2c->sending_list);
569}
570
Olivier Houchard7a977432019-03-21 15:47:13 +0100571static __inline int
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200572h2c_is_dead(const struct h2c *h2c)
Olivier Houchard7a977432019-03-21 15:47:13 +0100573{
574 if (eb_is_empty(&h2c->streams_by_id) && /* don't close if streams exist */
575 ((h2c->conn->flags & CO_FL_ERROR) || /* errors close immediately */
576 (h2c->st0 >= H2_CS_ERROR && !h2c->task) || /* a timeout stroke earlier */
577 (!(h2c->conn->owner)) || /* Nobody's left to take care of the connection, drop it now */
Willy Tarreau662fafc2019-05-26 09:43:07 +0200578 (!br_data(h2c->mbuf) && /* mux buffer empty, also process clean events below */
Olivier Houchard7a977432019-03-21 15:47:13 +0100579 (conn_xprt_read0_pending(h2c->conn) ||
580 (h2c->last_sid >= 0 && h2c->max_id >= h2c->last_sid)))))
581 return 1;
582
583 return 0;
Olivier Houchard7a977432019-03-21 15:47:13 +0100584}
585
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200586/*****************************************************/
587/* functions below are for dynamic buffer management */
588/*****************************************************/
589
Willy Tarreau315d8072017-12-10 22:17:57 +0100590/* indicates whether or not the we may call the h2_recv() function to attempt
591 * to receive data into the buffer and/or demux pending data. The condition is
592 * a bit complex due to some API limits for now. The rules are the following :
593 * - if an error or a shutdown was detected on the connection and the buffer
594 * is empty, we must not attempt to receive
595 * - if the demux buf failed to be allocated, we must not try to receive and
596 * we know there is nothing pending
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100597 * - if no flag indicates a blocking condition, we may attempt to receive,
598 * regardless of whether the demux buffer is full or not, so that only
599 * de demux part decides whether or not to block. This is needed because
600 * the connection API indeed prevents us from re-enabling receipt that is
601 * already enabled in a polled state, so we must always immediately stop
602 * as soon as the demux can't proceed so as never to hit an end of read
603 * with data pending in the buffers.
Willy Tarreau315d8072017-12-10 22:17:57 +0100604 * - otherwise must may not attempt
605 */
606static inline int h2_recv_allowed(const struct h2c *h2c)
607{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200608 if (b_data(&h2c->dbuf) == 0 &&
Willy Tarreau315d8072017-12-10 22:17:57 +0100609 (h2c->st0 >= H2_CS_ERROR ||
610 h2c->conn->flags & CO_FL_ERROR ||
611 conn_xprt_read0_pending(h2c->conn)))
612 return 0;
613
614 if (!(h2c->flags & H2_CF_DEM_DALLOC) &&
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100615 !(h2c->flags & H2_CF_DEM_BLOCK_ANY))
Willy Tarreau315d8072017-12-10 22:17:57 +0100616 return 1;
617
618 return 0;
619}
620
Willy Tarreau47b515a2018-12-21 16:09:41 +0100621/* restarts reading on the connection if it was not enabled */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200622static inline void h2c_restart_reading(const struct h2c *h2c, int consider_buffer)
Willy Tarreau47b515a2018-12-21 16:09:41 +0100623{
624 if (!h2_recv_allowed(h2c))
625 return;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200626 if ((!consider_buffer || !b_data(&h2c->dbuf))
627 && (h2c->wait_event.events & SUB_RETRY_RECV))
Willy Tarreau47b515a2018-12-21 16:09:41 +0100628 return;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200629 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau47b515a2018-12-21 16:09:41 +0100630}
631
632
Willy Tarreaufa1d3572019-01-31 10:31:51 +0100633/* returns true if the front connection has too many conn_streams attached */
634static inline int h2_frt_has_too_many_cs(const struct h2c *h2c)
Willy Tarreauf2101912018-07-19 10:11:38 +0200635{
Willy Tarreaua8754662018-12-23 20:43:58 +0100636 return h2c->nb_cs > h2_settings_max_concurrent_streams;
Willy Tarreauf2101912018-07-19 10:11:38 +0200637}
638
Willy Tarreau44e973f2018-03-01 17:49:30 +0100639/* Tries to grab a buffer and to re-enable processing on mux <target>. The h2c
640 * flags are used to figure what buffer was requested. It returns 1 if the
641 * allocation succeeds, in which case the connection is woken up, or 0 if it's
642 * impossible to wake up and we prefer to be woken up later.
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200643 */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100644static int h2_buf_available(void *target)
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200645{
646 struct h2c *h2c = target;
Willy Tarreau0b559072018-02-26 15:22:17 +0100647 struct h2s *h2s;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200648
Willy Tarreau44e973f2018-03-01 17:49:30 +0100649 if ((h2c->flags & H2_CF_DEM_DALLOC) && b_alloc_margin(&h2c->dbuf, 0)) {
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200650 h2c->flags &= ~H2_CF_DEM_DALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200651 h2c_restart_reading(h2c, 1);
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200652 return 1;
653 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200654
Willy Tarreau51330962019-05-26 09:38:07 +0200655 if ((h2c->flags & H2_CF_MUX_MALLOC) && b_alloc_margin(br_tail(h2c->mbuf), 0)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100656 h2c->flags &= ~H2_CF_MUX_MALLOC;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200657
658 if (h2c->flags & H2_CF_DEM_MROOM) {
659 h2c->flags &= ~H2_CF_DEM_MROOM;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200660 h2c_restart_reading(h2c, 1);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200661 }
Willy Tarreau14398122017-09-22 14:26:04 +0200662 return 1;
663 }
Willy Tarreau0b559072018-02-26 15:22:17 +0100664
665 if ((h2c->flags & H2_CF_DEM_SALLOC) &&
666 (h2s = h2c_st_by_id(h2c, h2c->dsi)) && h2s->cs &&
Olivier Houchard638b7992018-08-16 15:41:52 +0200667 b_alloc_margin(&h2s->rxbuf, 0)) {
Willy Tarreau0b559072018-02-26 15:22:17 +0100668 h2c->flags &= ~H2_CF_DEM_SALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200669 h2c_restart_reading(h2c, 1);
Willy Tarreau0b559072018-02-26 15:22:17 +0100670 return 1;
671 }
672
Willy Tarreau14398122017-09-22 14:26:04 +0200673 return 0;
674}
675
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200676static inline struct buffer *h2_get_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200677{
678 struct buffer *buf = NULL;
679
Willy Tarreauc234ae32019-05-13 17:56:11 +0200680 if (likely(!LIST_ADDED(&h2c->buf_wait.list)) &&
Willy Tarreau44e973f2018-03-01 17:49:30 +0100681 unlikely((buf = b_alloc_margin(bptr, 0)) == NULL)) {
682 h2c->buf_wait.target = h2c;
683 h2c->buf_wait.wakeup_cb = h2_buf_available;
Christopher Faulet2a944ee2017-11-07 10:42:54 +0100684 HA_SPIN_LOCK(BUF_WQ_LOCK, &buffer_wq_lock);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100685 LIST_ADDQ(&buffer_wq, &h2c->buf_wait.list);
Christopher Faulet2a944ee2017-11-07 10:42:54 +0100686 HA_SPIN_UNLOCK(BUF_WQ_LOCK, &buffer_wq_lock);
Willy Tarreau14398122017-09-22 14:26:04 +0200687 __conn_xprt_stop_recv(h2c->conn);
688 }
689 return buf;
690}
691
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200692static inline void h2_release_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200693{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200694 if (bptr->size) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100695 b_free(bptr);
Willy Tarreau201840a2019-05-29 17:50:48 +0200696 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau14398122017-09-22 14:26:04 +0200697 }
698}
699
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200700static inline void h2_release_mbuf(struct h2c *h2c)
701{
702 struct buffer *buf;
703 unsigned int count = 0;
704
705 while (b_size(buf = br_head_pick(h2c->mbuf))) {
706 b_free(buf);
707 count++;
708 }
709 if (count)
Willy Tarreau201840a2019-05-29 17:50:48 +0200710 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200711}
712
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100713/* returns the number of allocatable outgoing streams for the connection taking
714 * the last_sid and the reserved ones into account.
715 */
716static inline int h2_streams_left(const struct h2c *h2c)
717{
718 int ret;
719
720 /* consider the number of outgoing streams we're allowed to create before
721 * reaching the last GOAWAY frame seen. max_id is the last assigned id,
722 * nb_reserved is the number of streams which don't yet have an ID.
723 */
724 ret = (h2c->last_sid >= 0) ? h2c->last_sid : 0x7FFFFFFF;
725 ret = (unsigned int)(ret - h2c->max_id) / 2 - h2c->nb_reserved - 1;
726 if (ret < 0)
727 ret = 0;
728 return ret;
729}
730
Willy Tarreau00f18a32019-01-26 12:19:01 +0100731/* returns the number of streams in use on a connection to figure if it's
732 * idle or not. We check nb_cs and not nb_streams as the caller will want
733 * to know if it was the last one after a detach().
734 */
735static int h2_used_streams(struct connection *conn)
736{
737 struct h2c *h2c = conn->ctx;
738
739 return h2c->nb_cs;
740}
741
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100742/* returns the number of concurrent streams available on the connection */
Olivier Houchardd540b362018-11-05 18:37:53 +0100743static int h2_avail_streams(struct connection *conn)
744{
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100745 struct server *srv = objt_server(conn->target);
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100746 struct h2c *h2c = conn->ctx;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100747 int ret1, ret2;
Olivier Houchardd540b362018-11-05 18:37:53 +0100748
Willy Tarreau6afec462019-01-28 06:40:19 +0100749 /* RFC7540#6.8: Receivers of a GOAWAY frame MUST NOT open additional
750 * streams on the connection.
751 */
752 if (h2c->last_sid >= 0)
753 return 0;
754
Willy Tarreau86949782019-01-31 10:42:05 +0100755 /* note: may be negative if a SETTINGS frame changes the limit */
756 ret1 = h2c->streams_limit - h2c->nb_streams;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100757
758 /* we must also consider the limit imposed by stream IDs */
759 ret2 = h2_streams_left(h2c);
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100760 ret1 = MIN(ret1, ret2);
Willy Tarreau86949782019-01-31 10:42:05 +0100761 if (ret1 > 0 && srv && srv->max_reuse >= 0) {
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100762 ret2 = h2c->stream_cnt <= srv->max_reuse ? srv->max_reuse - h2c->stream_cnt + 1: 0;
763 ret1 = MIN(ret1, ret2);
764 }
765 return ret1;
Olivier Houchardd540b362018-11-05 18:37:53 +0100766}
767
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200768
Willy Tarreau62f52692017-10-08 23:01:42 +0200769/*****************************************************************/
770/* functions below are dedicated to the mux setup and management */
771/*****************************************************************/
772
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200773/* Initialize the mux once it's attached. For outgoing connections, the context
774 * is already initialized before installing the mux, so we detect incoming
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200775 * connections from the fact that the context is still NULL (even during mux
776 * upgrades). <input> is always used as Input buffer and may contain data. It is
777 * the caller responsibility to not reuse it anymore. Returns < 0 on error.
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200778 */
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200779static int h2_init(struct connection *conn, struct proxy *prx, struct session *sess,
780 struct buffer *input)
Willy Tarreau32218eb2017-09-22 08:07:25 +0200781{
782 struct h2c *h2c;
Willy Tarreauea392822017-10-31 10:02:25 +0100783 struct task *t = NULL;
Christopher Fauletf81ef032019-10-04 15:19:43 +0200784 void *conn_ctx = conn->ctx;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200785
Christopher Fauletf81ef032019-10-04 15:19:43 +0200786 TRACE_ENTER(H2_EV_H2C_NEW);
Willy Tarreau7838a792019-08-12 18:42:03 +0200787
Willy Tarreaubafbe012017-11-24 17:34:44 +0100788 h2c = pool_alloc(pool_head_h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200789 if (!h2c)
mildiscd2d7de2018-10-02 16:44:18 +0200790 goto fail_no_h2c;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200791
Christopher Faulete9b70722019-04-08 10:46:02 +0200792 if (conn_is_back(conn)) {
Willy Tarreau01b44822018-10-03 14:26:37 +0200793 h2c->flags = H2_CF_IS_BACK;
794 h2c->shut_timeout = h2c->timeout = prx->timeout.server;
795 if (tick_isset(prx->timeout.serverfin))
796 h2c->shut_timeout = prx->timeout.serverfin;
797 } else {
798 h2c->flags = H2_CF_NONE;
799 h2c->shut_timeout = h2c->timeout = prx->timeout.client;
800 if (tick_isset(prx->timeout.clientfin))
801 h2c->shut_timeout = prx->timeout.clientfin;
802 }
Willy Tarreau3f133572017-10-31 19:21:06 +0100803
Willy Tarreau0b37d652018-10-03 10:33:02 +0200804 h2c->proxy = prx;
Willy Tarreau33400292017-11-05 11:23:40 +0100805 h2c->task = NULL;
Willy Tarreau3f133572017-10-31 19:21:06 +0100806 if (tick_isset(h2c->timeout)) {
807 t = task_new(tid_bit);
808 if (!t)
809 goto fail;
810
811 h2c->task = t;
812 t->process = h2_timeout_task;
813 t->context = h2c;
814 t->expire = tick_add(now_ms, h2c->timeout);
815 }
Willy Tarreauea392822017-10-31 10:02:25 +0100816
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200817 h2c->wait_event.tasklet = tasklet_new();
818 if (!h2c->wait_event.tasklet)
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200819 goto fail;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200820 h2c->wait_event.tasklet->process = h2_io_cb;
821 h2c->wait_event.tasklet->context = h2c;
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100822 h2c->wait_event.events = 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200823
Willy Tarreau32218eb2017-09-22 08:07:25 +0200824 h2c->ddht = hpack_dht_alloc(h2_settings_header_table_size);
825 if (!h2c->ddht)
826 goto fail;
827
828 /* Initialise the context. */
829 h2c->st0 = H2_CS_PREFACE;
830 h2c->conn = conn;
Willy Tarreau2e2083a2019-01-31 10:34:07 +0100831 h2c->streams_limit = h2_settings_max_concurrent_streams;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200832 h2c->max_id = -1;
833 h2c->errcode = H2_ERR_NO_ERROR;
Willy Tarreau97aaa672018-12-23 09:49:04 +0100834 h2c->rcvd_c = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200835 h2c->rcvd_s = 0;
Willy Tarreau49745612017-12-03 18:56:02 +0100836 h2c->nb_streams = 0;
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200837 h2c->nb_cs = 0;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100838 h2c->nb_reserved = 0;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100839 h2c->stream_cnt = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200840
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200841 h2c->dbuf = *input;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200842 h2c->dsi = -1;
843 h2c->msi = -1;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100844
Willy Tarreau32218eb2017-09-22 08:07:25 +0200845 h2c->last_sid = -1;
846
Willy Tarreau51330962019-05-26 09:38:07 +0200847 br_init(h2c->mbuf, sizeof(h2c->mbuf) / sizeof(h2c->mbuf[0]));
Willy Tarreau32218eb2017-09-22 08:07:25 +0200848 h2c->miw = 65535; /* mux initial window size */
849 h2c->mws = 65535; /* mux window size */
850 h2c->mfs = 16384; /* initial max frame size */
Willy Tarreau751f2d02018-10-05 09:35:00 +0200851 h2c->streams_by_id = EB_ROOT;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200852 LIST_INIT(&h2c->send_list);
853 LIST_INIT(&h2c->fctl_list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200854 LIST_INIT(&h2c->blocked_list);
Olivier Houchardd846c262018-10-19 17:24:29 +0200855 LIST_INIT(&h2c->sending_list);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100856 LIST_INIT(&h2c->buf_wait.list);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200857
Christopher Fauletf81ef032019-10-04 15:19:43 +0200858 conn->ctx = h2c;
859
Willy Tarreau3f133572017-10-31 19:21:06 +0100860 if (t)
861 task_queue(t);
Willy Tarreauea392822017-10-31 10:02:25 +0100862
Willy Tarreau01b44822018-10-03 14:26:37 +0200863 if (h2c->flags & H2_CF_IS_BACK) {
864 /* FIXME: this is temporary, for outgoing connections we need
865 * to immediately allocate a stream until the code is modified
866 * so that the caller calls ->attach(). For now the outgoing cs
Christopher Fauletf81ef032019-10-04 15:19:43 +0200867 * is stored as conn->ctx by the caller and saved in conn_ctx.
Willy Tarreau01b44822018-10-03 14:26:37 +0200868 */
869 struct h2s *h2s;
870
Christopher Fauletf81ef032019-10-04 15:19:43 +0200871 h2s = h2c_bck_stream_new(h2c, conn_ctx, sess);
Willy Tarreau01b44822018-10-03 14:26:37 +0200872 if (!h2s)
873 goto fail_stream;
874 }
875
Willy Tarreau0f383582018-10-03 14:22:21 +0200876 /* prepare to read something */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200877 h2c_restart_reading(h2c, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +0200878 TRACE_LEAVE(H2_EV_H2C_NEW, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200879 return 0;
Willy Tarreau01b44822018-10-03 14:26:37 +0200880 fail_stream:
881 hpack_dht_free(h2c->ddht);
mildiscd2d7de2018-10-02 16:44:18 +0200882 fail:
Willy Tarreauf6562792019-05-07 19:05:35 +0200883 task_destroy(t);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200884 if (h2c->wait_event.tasklet)
885 tasklet_free(h2c->wait_event.tasklet);
Willy Tarreaubafbe012017-11-24 17:34:44 +0100886 pool_free(pool_head_h2c, h2c);
mildiscd2d7de2018-10-02 16:44:18 +0200887 fail_no_h2c:
Christopher Fauletf81ef032019-10-04 15:19:43 +0200888 conn->ctx = conn_ctx; /* restore saved ctx */
889 TRACE_DEVEL("leaving in error", H2_EV_H2C_NEW|H2_EV_H2C_END|H2_EV_H2C_ERR);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200890 return -1;
891}
892
Willy Tarreau751f2d02018-10-05 09:35:00 +0200893/* returns the next allocatable outgoing stream ID for the H2 connection, or
894 * -1 if no more is allocatable.
895 */
896static inline int32_t h2c_get_next_sid(const struct h2c *h2c)
897{
898 int32_t id = (h2c->max_id + 1) | 1;
Willy Tarreaua80dca82019-01-24 17:08:28 +0100899
900 if ((id & 0x80000000U) || (h2c->last_sid >= 0 && id > h2c->last_sid))
Willy Tarreau751f2d02018-10-05 09:35:00 +0200901 id = -1;
902 return id;
903}
904
Willy Tarreau2373acc2017-10-12 17:35:14 +0200905/* returns the stream associated with id <id> or NULL if not found */
906static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id)
907{
908 struct eb32_node *node;
909
Willy Tarreau751f2d02018-10-05 09:35:00 +0200910 if (id == 0)
911 return (struct h2s *)h2_closed_stream;
912
Willy Tarreau2a856182017-05-16 15:20:39 +0200913 if (id > h2c->max_id)
914 return (struct h2s *)h2_idle_stream;
915
Willy Tarreau2373acc2017-10-12 17:35:14 +0200916 node = eb32_lookup(&h2c->streams_by_id, id);
917 if (!node)
Willy Tarreau2a856182017-05-16 15:20:39 +0200918 return (struct h2s *)h2_closed_stream;
Willy Tarreau2373acc2017-10-12 17:35:14 +0200919
920 return container_of(node, struct h2s, by_id);
921}
922
Christopher Faulet73c12072019-04-08 11:23:22 +0200923/* release function. This one should be called to free all resources allocated
924 * to the mux.
Willy Tarreau62f52692017-10-08 23:01:42 +0200925 */
Christopher Faulet73c12072019-04-08 11:23:22 +0200926static void h2_release(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +0200927{
Christopher Faulet61840e72019-04-15 09:33:32 +0200928 struct connection *conn = NULL;;
Christopher Faulet39a96ee2019-04-08 10:52:21 +0200929
Willy Tarreau7838a792019-08-12 18:42:03 +0200930 TRACE_ENTER(H2_EV_H2C_END);
931
Willy Tarreau32218eb2017-09-22 08:07:25 +0200932 if (h2c) {
Christopher Faulet61840e72019-04-15 09:33:32 +0200933 /* The connection must be aattached to this mux to be released */
934 if (h2c->conn && h2c->conn->ctx == h2c)
935 conn = h2c->conn;
936
Willy Tarreau7838a792019-08-12 18:42:03 +0200937 TRACE_DEVEL("freeing h2c", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200938 hpack_dht_free(h2c->ddht);
Willy Tarreau14398122017-09-22 14:26:04 +0200939
Willy Tarreau186e96e2019-05-28 17:21:18 +0200940 if (LIST_ADDED(&h2c->buf_wait.list)) {
941 HA_SPIN_LOCK(BUF_WQ_LOCK, &buffer_wq_lock);
942 LIST_DEL(&h2c->buf_wait.list);
943 HA_SPIN_UNLOCK(BUF_WQ_LOCK, &buffer_wq_lock);
944 }
Willy Tarreau14398122017-09-22 14:26:04 +0200945
Willy Tarreau44e973f2018-03-01 17:49:30 +0100946 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200947 h2_release_mbuf(h2c);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100948
Willy Tarreauea392822017-10-31 10:02:25 +0100949 if (h2c->task) {
Willy Tarreau0975f112018-03-29 15:22:59 +0200950 h2c->task->context = NULL;
951 task_wakeup(h2c->task, TASK_WOKEN_OTHER);
Willy Tarreauea392822017-10-31 10:02:25 +0100952 h2c->task = NULL;
953 }
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200954 if (h2c->wait_event.tasklet)
955 tasklet_free(h2c->wait_event.tasklet);
Christopher Faulet21d849f2019-09-18 11:07:20 +0200956 if (conn && h2c->wait_event.events != 0)
Olivier Houcharde179d0e2019-03-21 18:27:17 +0100957 conn->xprt->unsubscribe(conn, conn->xprt_ctx, h2c->wait_event.events,
Christopher Faulet21d849f2019-09-18 11:07:20 +0200958 &h2c->wait_event);
Willy Tarreauea392822017-10-31 10:02:25 +0100959
Willy Tarreaubafbe012017-11-24 17:34:44 +0100960 pool_free(pool_head_h2c, h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200961 }
962
Christopher Faulet39a96ee2019-04-08 10:52:21 +0200963 if (conn) {
964 conn->mux = NULL;
965 conn->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +0200966 TRACE_DEVEL("freeing conn", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200967
Christopher Faulet39a96ee2019-04-08 10:52:21 +0200968 conn_stop_tracking(conn);
969 conn_full_close(conn);
970 if (conn->destroy_cb)
971 conn->destroy_cb(conn);
972 conn_free(conn);
973 }
Willy Tarreau7838a792019-08-12 18:42:03 +0200974
975 TRACE_LEAVE(H2_EV_H2C_END);
Willy Tarreau62f52692017-10-08 23:01:42 +0200976}
977
978
Willy Tarreau71681172017-10-23 14:39:06 +0200979/******************************************************/
980/* functions below are for the H2 protocol processing */
981/******************************************************/
982
983/* returns the stream if of stream <h2s> or 0 if <h2s> is NULL */
Willy Tarreau1f094672017-11-20 21:27:45 +0100984static inline __maybe_unused int h2s_id(const struct h2s *h2s)
Willy Tarreau71681172017-10-23 14:39:06 +0200985{
986 return h2s ? h2s->id : 0;
987}
988
Willy Tarreau1d4a0f82019-08-02 07:52:08 +0200989/* returns the sum of the stream's own window size and the mux's initial
990 * window, which together form the stream's effective window size.
991 */
992static inline int h2s_mws(const struct h2s *h2s)
993{
994 return h2s->sws + h2s->h2c->miw;
995}
996
Willy Tarreau5b5e6872017-09-25 16:17:25 +0200997/* returns true of the mux is currently busy as seen from stream <h2s> */
Willy Tarreau1f094672017-11-20 21:27:45 +0100998static inline __maybe_unused int h2c_mux_busy(const struct h2c *h2c, const struct h2s *h2s)
Willy Tarreau5b5e6872017-09-25 16:17:25 +0200999{
1000 if (h2c->msi < 0)
1001 return 0;
1002
1003 if (h2c->msi == h2s_id(h2s))
1004 return 0;
1005
1006 return 1;
1007}
1008
Willy Tarreau741d6df2017-10-17 08:00:59 +02001009/* marks an error on the connection */
Willy Tarreau1f094672017-11-20 21:27:45 +01001010static inline __maybe_unused void h2c_error(struct h2c *h2c, enum h2_err err)
Willy Tarreau741d6df2017-10-17 08:00:59 +02001011{
Willy Tarreau7838a792019-08-12 18:42:03 +02001012 TRACE_POINT(H2_EV_H2C_ERR, h2c->conn,,, (void *)(long)(err));
Willy Tarreau741d6df2017-10-17 08:00:59 +02001013 h2c->errcode = err;
1014 h2c->st0 = H2_CS_ERROR;
1015}
1016
Willy Tarreau175cebb2019-01-24 10:02:24 +01001017/* marks an error on the stream. It may also update an already closed stream
1018 * (e.g. to report an error after an RST was received).
1019 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001020static inline __maybe_unused void h2s_error(struct h2s *h2s, enum h2_err err)
Willy Tarreau2e43f082017-10-17 08:03:59 +02001021{
Willy Tarreau175cebb2019-01-24 10:02:24 +01001022 if (h2s->id && h2s->st != H2_SS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001023 TRACE_POINT(H2_EV_H2S_ERR, h2s->h2c->conn, h2s,, (void *)(long)(err));
Willy Tarreau2e43f082017-10-17 08:03:59 +02001024 h2s->errcode = err;
Willy Tarreau175cebb2019-01-24 10:02:24 +01001025 if (h2s->st < H2_SS_ERROR)
1026 h2s->st = H2_SS_ERROR;
Willy Tarreauec988c72018-12-19 18:00:29 +01001027 if (h2s->cs)
1028 cs_set_error(h2s->cs);
Willy Tarreau2e43f082017-10-17 08:03:59 +02001029 }
1030}
1031
Willy Tarreau7e094452018-12-19 18:08:52 +01001032/* attempt to notify the data layer of recv availability */
1033static void __maybe_unused h2s_notify_recv(struct h2s *h2s)
1034{
1035 struct wait_event *sw;
1036
1037 if (h2s->recv_wait) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001038 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau7e094452018-12-19 18:08:52 +01001039 sw = h2s->recv_wait;
1040 sw->events &= ~SUB_RETRY_RECV;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001041 tasklet_wakeup(sw->tasklet);
Willy Tarreau7e094452018-12-19 18:08:52 +01001042 h2s->recv_wait = NULL;
1043 }
1044}
1045
1046/* attempt to notify the data layer of send availability */
1047static void __maybe_unused h2s_notify_send(struct h2s *h2s)
1048{
1049 struct wait_event *sw;
1050
Willy Tarreauc234ae32019-05-13 17:56:11 +02001051 if (h2s->send_wait && !LIST_ADDED(&h2s->sending_list)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001052 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau7e094452018-12-19 18:08:52 +01001053 sw = h2s->send_wait;
1054 sw->events &= ~SUB_RETRY_SEND;
Olivier Houchardfd1e96d2019-03-25 14:04:25 +01001055 LIST_ADDQ(&h2s->h2c->sending_list, &h2s->sending_list);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001056 tasklet_wakeup(sw->tasklet);
Willy Tarreau7e094452018-12-19 18:08:52 +01001057 }
1058}
1059
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001060/* alerts the data layer, trying to wake it up by all means, following
1061 * this sequence :
1062 * - if the h2s' data layer is subscribed to recv, then it's woken up for recv
1063 * - if its subscribed to send, then it's woken up for send
1064 * - if it was subscribed to neither, its ->wake() callback is called
1065 * It is safe to call this function with a closed stream which doesn't have a
1066 * conn_stream anymore.
1067 */
1068static void __maybe_unused h2s_alert(struct h2s *h2s)
1069{
Willy Tarreau7838a792019-08-12 18:42:03 +02001070 TRACE_ENTER(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
1071
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001072 if (h2s->recv_wait || h2s->send_wait) {
1073 h2s_notify_recv(h2s);
1074 h2s_notify_send(h2s);
1075 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001076 else if (h2s->cs && h2s->cs->data_cb->wake != NULL) {
1077 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001078 h2s->cs->data_cb->wake(h2s->cs);
Willy Tarreau7838a792019-08-12 18:42:03 +02001079 }
1080
1081 TRACE_LEAVE(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001082}
1083
Willy Tarreaue4820742017-07-27 13:37:23 +02001084/* writes the 24-bit frame size <len> at address <frame> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001085static inline __maybe_unused void h2_set_frame_size(void *frame, uint32_t len)
Willy Tarreaue4820742017-07-27 13:37:23 +02001086{
1087 uint8_t *out = frame;
1088
1089 *out = len >> 16;
1090 write_n16(out + 1, len);
1091}
1092
Willy Tarreau54c15062017-10-10 17:10:03 +02001093/* reads <bytes> bytes from buffer <b> starting at relative offset <o> from the
1094 * current pointer, dealing with wrapping, and stores the result in <dst>. It's
1095 * the caller's responsibility to verify that there are at least <bytes> bytes
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001096 * available in the buffer's input prior to calling this function. The buffer
1097 * is assumed not to hold any output data.
Willy Tarreau54c15062017-10-10 17:10:03 +02001098 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001099static inline __maybe_unused void h2_get_buf_bytes(void *dst, size_t bytes,
Willy Tarreau54c15062017-10-10 17:10:03 +02001100 const struct buffer *b, int o)
1101{
Willy Tarreau591d4452018-06-15 17:21:00 +02001102 readv_bytes(dst, bytes, b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001103}
1104
Willy Tarreau1f094672017-11-20 21:27:45 +01001105static inline __maybe_unused uint16_t h2_get_n16(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001106{
Willy Tarreau591d4452018-06-15 17:21:00 +02001107 return readv_n16(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001108}
1109
Willy Tarreau1f094672017-11-20 21:27:45 +01001110static inline __maybe_unused uint32_t h2_get_n32(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001111{
Willy Tarreau591d4452018-06-15 17:21:00 +02001112 return readv_n32(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001113}
1114
Willy Tarreau1f094672017-11-20 21:27:45 +01001115static inline __maybe_unused uint64_t h2_get_n64(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001116{
Willy Tarreau591d4452018-06-15 17:21:00 +02001117 return readv_n64(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001118}
1119
1120
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001121/* Peeks an H2 frame header from offset <o> of buffer <b> into descriptor <h>.
1122 * The algorithm is not obvious. It turns out that H2 headers are neither
1123 * aligned nor do they use regular sizes. And to add to the trouble, the buffer
1124 * may wrap so each byte read must be checked. The header is formed like this :
Willy Tarreau715d5312017-07-11 15:20:24 +02001125 *
1126 * b0 b1 b2 b3 b4 b5..b8
1127 * +----------+---------+--------+----+----+----------------------+
1128 * |len[23:16]|len[15:8]|len[7:0]|type|flag|sid[31:0] (big endian)|
1129 * +----------+---------+--------+----+----+----------------------+
1130 *
1131 * Here we read a big-endian 64 bit word from h[1]. This way in a single read
1132 * we get the sid properly aligned and ordered, and 16 bits of len properly
1133 * ordered as well. The type and flags can be extracted using bit shifts from
1134 * the word, and only one extra read is needed to fetch len[16:23].
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001135 * Returns zero if some bytes are missing, otherwise non-zero on success. The
1136 * buffer is assumed not to contain any output data.
Willy Tarreau715d5312017-07-11 15:20:24 +02001137 */
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001138static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, int o, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001139{
1140 uint64_t w;
1141
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001142 if (b_data(b) < o + 9)
Willy Tarreau715d5312017-07-11 15:20:24 +02001143 return 0;
1144
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001145 w = h2_get_n64(b, o + 1);
1146 h->len = *(uint8_t*)b_peek(b, o) << 16;
Willy Tarreau715d5312017-07-11 15:20:24 +02001147 h->sid = w & 0x7FFFFFFF; /* RFC7540#4.1: R bit must be ignored */
1148 h->ff = w >> 32;
1149 h->ft = w >> 40;
1150 h->len += w >> 48;
1151 return 1;
1152}
1153
1154/* skip the next 9 bytes corresponding to the frame header possibly parsed by
1155 * h2_peek_frame_hdr() above.
1156 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001157static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b)
Willy Tarreau715d5312017-07-11 15:20:24 +02001158{
Willy Tarreaue5f12ce2018-06-15 10:28:05 +02001159 b_del(b, 9);
Willy Tarreau715d5312017-07-11 15:20:24 +02001160}
1161
1162/* same as above, automatically advances the buffer on success */
Willy Tarreau1f094672017-11-20 21:27:45 +01001163static inline __maybe_unused int h2_get_frame_hdr(struct buffer *b, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001164{
1165 int ret;
1166
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001167 ret = h2_peek_frame_hdr(b, 0, h);
Willy Tarreau715d5312017-07-11 15:20:24 +02001168 if (ret > 0)
1169 h2_skip_frame_hdr(b);
1170 return ret;
1171}
1172
Willy Tarreaucb985a42019-10-07 16:56:34 +02001173
1174/* try to fragment the headers frame present at the beginning of buffer <b>,
1175 * enforcing a limit of <mfs> bytes per frame. Returns 0 on failure, 1 on
1176 * success. Typical causes of failure include a buffer not large enough to
1177 * add extra frame headers. The existing frame size is read in the current
1178 * frame. Its EH flag will be cleared if CONTINUATION frames need to be added,
1179 * and its length will be adjusted. The stream ID for continuation frames will
1180 * be copied from the initial frame's.
1181 */
1182static int h2_fragment_headers(struct buffer *b, uint32_t mfs)
1183{
1184 size_t remain = b->data - 9;
1185 int extra_frames = (remain - 1) / mfs;
1186 size_t fsize;
1187 char *fptr;
1188 int frame;
1189
1190 if (b->data <= mfs + 9)
1191 return 1;
1192
1193 /* Too large a frame, we need to fragment it using CONTINUATION
1194 * frames. We start from the end and move tails as needed.
1195 */
1196 if (b->data + extra_frames * 9 > b->size)
1197 return 0;
1198
1199 for (frame = extra_frames; frame; frame--) {
1200 fsize = ((remain - 1) % mfs) + 1;
1201 remain -= fsize;
1202
1203 /* move data */
1204 fptr = b->area + 9 + remain + (frame - 1) * 9;
1205 memmove(fptr + 9, b->area + 9 + remain, fsize);
1206 b->data += 9;
1207
1208 /* write new frame header */
1209 h2_set_frame_size(fptr, fsize);
1210 fptr[3] = H2_FT_CONTINUATION;
1211 fptr[4] = (frame == extra_frames) ? H2_F_HEADERS_END_HEADERS : 0;
1212 write_n32(fptr + 5, read_n32(b->area + 5));
1213 }
1214
1215 b->area[4] &= ~H2_F_HEADERS_END_HEADERS;
1216 h2_set_frame_size(b->area, remain);
1217 return 1;
1218}
1219
1220
Willy Tarreau00dd0782018-03-01 16:31:34 +01001221/* marks stream <h2s> as CLOSED and decrement the number of active streams for
1222 * its connection if the stream was not yet closed. Please use this exclusively
1223 * before closing a stream to ensure stream count is well maintained.
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001224 */
Willy Tarreau00dd0782018-03-01 16:31:34 +01001225static inline void h2s_close(struct h2s *h2s)
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001226{
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001227 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001228 TRACE_ENTER(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001229 h2s->h2c->nb_streams--;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001230 if (!h2s->id)
1231 h2s->h2c->nb_reserved--;
Willy Tarreaua27db382019-03-25 18:13:16 +01001232 if (h2s->cs) {
Willy Tarreaua27db382019-03-25 18:13:16 +01001233 if (!(h2s->cs->flags & CS_FL_EOS) && !b_data(&h2s->rxbuf))
1234 h2s_notify_recv(h2s);
1235 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001236 TRACE_LEAVE(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001237 }
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001238 h2s->st = H2_SS_CLOSED;
1239}
1240
Willy Tarreau71049cc2018-03-28 13:56:39 +02001241/* detaches an H2 stream from its H2C and releases it to the H2S pool. */
1242static void h2s_destroy(struct h2s *h2s)
Willy Tarreau0a10de62018-03-01 16:27:53 +01001243{
Willy Tarreau7838a792019-08-12 18:42:03 +02001244 struct connection *conn = h2s->h2c->conn;
1245
1246 TRACE_ENTER(H2_EV_H2S_END, conn, h2s);
1247
Willy Tarreau0a10de62018-03-01 16:27:53 +01001248 h2s_close(h2s);
1249 eb32_delete(&h2s->by_id);
Olivier Houchard638b7992018-08-16 15:41:52 +02001250 if (b_size(&h2s->rxbuf)) {
1251 b_free(&h2s->rxbuf);
1252 offer_buffers(NULL, tasks_run_queue);
1253 }
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001254 if (h2s->send_wait != NULL)
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001255 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001256 if (h2s->recv_wait != NULL)
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001257 h2s->recv_wait->events &= ~SUB_RETRY_RECV;
Joseph Herlantd77575d2018-11-25 10:54:45 -08001258 /* There's no need to explicitly call unsubscribe here, the only
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001259 * reference left would be in the h2c send_list/fctl_list, and if
1260 * we're in it, we're getting out anyway
1261 */
Olivier Houchardd360ac62019-03-22 17:37:16 +01001262 LIST_DEL_INIT(&h2s->list);
Willy Tarreauc234ae32019-05-13 17:56:11 +02001263 if (LIST_ADDED(&h2s->sending_list)) {
Willy Tarreau86eded62019-06-14 14:47:49 +02001264 tasklet_remove_from_tasklet_list(h2s->send_wait->tasklet);
Olivier Houchard998410a2019-04-15 19:23:37 +02001265 LIST_DEL_INIT(&h2s->sending_list);
1266 }
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001267 tasklet_free(h2s->wait_event.tasklet);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001268 pool_free(pool_head_h2s, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001269
1270 TRACE_LEAVE(H2_EV_H2S_END, conn);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001271}
1272
Willy Tarreaua8e49542018-10-03 18:53:55 +02001273/* allocates a new stream <id> for connection <h2c> and adds it into h2c's
1274 * stream tree. In case of error, nothing is added and NULL is returned. The
1275 * causes of errors can be any failed memory allocation. The caller is
1276 * responsible for checking if the connection may support an extra stream
1277 * prior to calling this function.
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001278 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02001279static struct h2s *h2s_new(struct h2c *h2c, int id)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001280{
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001281 struct h2s *h2s;
1282
Willy Tarreau7838a792019-08-12 18:42:03 +02001283 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1284
Willy Tarreaubafbe012017-11-24 17:34:44 +01001285 h2s = pool_alloc(pool_head_h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001286 if (!h2s)
1287 goto out;
1288
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001289 h2s->wait_event.tasklet = tasklet_new();
1290 if (!h2s->wait_event.tasklet) {
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001291 pool_free(pool_head_h2s, h2s);
1292 goto out;
1293 }
1294 h2s->send_wait = NULL;
1295 h2s->recv_wait = NULL;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001296 h2s->wait_event.tasklet->process = h2_deferred_shut;
1297 h2s->wait_event.tasklet->context = h2s;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001298 h2s->wait_event.events = 0;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001299 LIST_INIT(&h2s->list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01001300 LIST_INIT(&h2s->sending_list);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001301 h2s->h2c = h2c;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001302 h2s->cs = NULL;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001303 h2s->sws = 0;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001304 h2s->flags = H2_SF_NONE;
1305 h2s->errcode = H2_ERR_NO_ERROR;
1306 h2s->st = H2_SS_IDLE;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02001307 h2s->status = 0;
Willy Tarreau1915ca22019-01-24 11:49:37 +01001308 h2s->body_len = 0;
Olivier Houchard638b7992018-08-16 15:41:52 +02001309 h2s->rxbuf = BUF_NULL;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001310
1311 if (h2c->flags & H2_CF_IS_BACK) {
1312 h1m_init_req(&h2s->h1m);
1313 h2s->h1m.err_pos = -1; // don't care about errors on the request path
1314 h2s->h1m.flags |= H1_MF_TOLOWER;
1315 } else {
1316 h1m_init_res(&h2s->h1m);
1317 h2s->h1m.err_pos = -1; // don't care about errors on the response path
1318 h2s->h1m.flags |= H1_MF_TOLOWER;
1319 }
1320
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001321 h2s->by_id.key = h2s->id = id;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001322 if (id > 0)
1323 h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001324 else
1325 h2c->nb_reserved++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001326
1327 eb32_insert(&h2c->streams_by_id, &h2s->by_id);
Willy Tarreau49745612017-12-03 18:56:02 +01001328 h2c->nb_streams++;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001329 h2c->stream_cnt++;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001330
Willy Tarreau7838a792019-08-12 18:42:03 +02001331 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001332 return h2s;
1333
1334 out_free_h2s:
1335 pool_free(pool_head_h2s, h2s);
1336 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001337 TRACE_DEVEL("leaving in error", H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001338 return NULL;
1339}
1340
1341/* creates a new stream <id> on the h2c connection and returns it, or NULL in
1342 * case of memory allocation error.
1343 */
1344static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id)
1345{
1346 struct session *sess = h2c->conn->owner;
1347 struct conn_stream *cs;
1348 struct h2s *h2s;
1349
Willy Tarreau7838a792019-08-12 18:42:03 +02001350 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1351
Willy Tarreaua8e49542018-10-03 18:53:55 +02001352 if (h2c->nb_streams >= h2_settings_max_concurrent_streams)
1353 goto out;
1354
1355 h2s = h2s_new(h2c, id);
1356 if (!h2s)
1357 goto out;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001358
1359 cs = cs_new(h2c->conn);
1360 if (!cs)
1361 goto out_close;
1362
Olivier Houchard746fb772018-12-15 19:42:00 +01001363 cs->flags |= CS_FL_NOT_FIRST;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001364 h2s->cs = cs;
1365 cs->ctx = h2s;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001366 h2c->nb_cs++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001367
1368 if (stream_create_from_cs(cs) < 0)
1369 goto out_free_cs;
1370
Willy Tarreau590a0512018-09-05 11:56:48 +02001371 /* We want the accept date presented to the next stream to be the one
1372 * we have now, the handshake time to be null (since the next stream
1373 * is not delayed by a handshake), and the idle time to count since
1374 * right now.
1375 */
1376 sess->accept_date = date;
1377 sess->tv_accept = now;
1378 sess->t_handshake = 0;
1379
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001380 /* OK done, the stream lives its own life now */
Willy Tarreaufa1d3572019-01-31 10:31:51 +01001381 if (h2_frt_has_too_many_cs(h2c))
Willy Tarreauf2101912018-07-19 10:11:38 +02001382 h2c->flags |= H2_CF_DEM_TOOMANY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001383 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001384 return h2s;
1385
1386 out_free_cs:
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001387 h2c->nb_cs--;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001388 cs_free(cs);
Olivier Houchard58d87f32019-05-29 16:44:17 +02001389 h2s->cs = NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001390 out_close:
Willy Tarreau71049cc2018-03-28 13:56:39 +02001391 h2s_destroy(h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001392 out:
Willy Tarreau45efc072018-10-03 18:27:52 +02001393 sess_log(sess);
Willy Tarreau7838a792019-08-12 18:42:03 +02001394 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreau45efc072018-10-03 18:27:52 +02001395 return NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001396}
1397
Willy Tarreau751f2d02018-10-05 09:35:00 +02001398/* allocates a new stream associated to conn_stream <cs> on the h2c connection
1399 * and returns it, or NULL in case of memory allocation error or if the highest
1400 * possible stream ID was reached.
1401 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01001402static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001403{
1404 struct h2s *h2s = NULL;
1405
Willy Tarreau7838a792019-08-12 18:42:03 +02001406 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1407
Willy Tarreau86949782019-01-31 10:42:05 +01001408 if (h2c->nb_streams >= h2c->streams_limit)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001409 goto out;
1410
Willy Tarreaua80dca82019-01-24 17:08:28 +01001411 if (h2_streams_left(h2c) < 1)
1412 goto out;
1413
Willy Tarreau751f2d02018-10-05 09:35:00 +02001414 /* Defer choosing the ID until we send the first message to create the stream */
1415 h2s = h2s_new(h2c, 0);
1416 if (!h2s)
1417 goto out;
1418
1419 h2s->cs = cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001420 h2s->sess = sess;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001421 cs->ctx = h2s;
1422 h2c->nb_cs++;
1423
Willy Tarreau751f2d02018-10-05 09:35:00 +02001424 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001425 if (likely(h2s))
1426 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
1427 else
1428 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn, h2s);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001429 return h2s;
1430}
1431
Willy Tarreaube5b7152017-09-25 16:25:39 +02001432/* try to send a settings frame on the connection. Returns > 0 on success, 0 if
1433 * it couldn't do anything. It may return an error in h2c. See RFC7540#11.3 for
1434 * the various settings codes.
1435 */
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001436static int h2c_send_settings(struct h2c *h2c)
Willy Tarreaube5b7152017-09-25 16:25:39 +02001437{
1438 struct buffer *res;
1439 char buf_data[100]; // enough for 15 settings
Willy Tarreau83061a82018-07-13 11:56:34 +02001440 struct buffer buf;
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001441 int mfs;
Willy Tarreau7838a792019-08-12 18:42:03 +02001442 int ret = 0;
1443
1444 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001445
1446 if (h2c_mux_busy(h2c, NULL)) {
1447 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001448 goto out;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001449 }
1450
Willy Tarreaube5b7152017-09-25 16:25:39 +02001451 chunk_init(&buf, buf_data, sizeof(buf_data));
1452 chunk_memcpy(&buf,
1453 "\x00\x00\x00" /* length : 0 for now */
1454 "\x04\x00" /* type : 4 (settings), flags : 0 */
1455 "\x00\x00\x00\x00", /* stream ID : 0 */
1456 9);
1457
Willy Tarreau0bbad6b2019-02-26 16:01:52 +01001458 if (h2c->flags & H2_CF_IS_BACK) {
1459 /* send settings_enable_push=0 */
1460 chunk_memcat(&buf, "\x00\x02\x00\x00\x00\x00", 6);
1461 }
1462
Willy Tarreaube5b7152017-09-25 16:25:39 +02001463 if (h2_settings_header_table_size != 4096) {
1464 char str[6] = "\x00\x01"; /* header_table_size */
1465
1466 write_n32(str + 2, h2_settings_header_table_size);
1467 chunk_memcat(&buf, str, 6);
1468 }
1469
1470 if (h2_settings_initial_window_size != 65535) {
1471 char str[6] = "\x00\x04"; /* initial_window_size */
1472
1473 write_n32(str + 2, h2_settings_initial_window_size);
1474 chunk_memcat(&buf, str, 6);
1475 }
1476
1477 if (h2_settings_max_concurrent_streams != 0) {
1478 char str[6] = "\x00\x03"; /* max_concurrent_streams */
1479
1480 /* Note: 0 means "unlimited" for haproxy's config but not for
1481 * the protocol, so never send this value!
1482 */
1483 write_n32(str + 2, h2_settings_max_concurrent_streams);
1484 chunk_memcat(&buf, str, 6);
1485 }
1486
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001487 mfs = h2_settings_max_frame_size;
1488 if (mfs > global.tune.bufsize)
1489 mfs = global.tune.bufsize;
1490
1491 if (!mfs)
1492 mfs = global.tune.bufsize;
1493
1494 if (mfs != 16384) {
Willy Tarreaube5b7152017-09-25 16:25:39 +02001495 char str[6] = "\x00\x05"; /* max_frame_size */
1496
1497 /* note: similarly we could also emit MAX_HEADER_LIST_SIZE to
1498 * match bufsize - rewrite size, but at the moment it seems
1499 * that clients don't take care of it.
1500 */
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001501 write_n32(str + 2, mfs);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001502 chunk_memcat(&buf, str, 6);
1503 }
1504
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001505 h2_set_frame_size(buf.area, buf.data - 9);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001506
1507 res = br_tail(h2c->mbuf);
1508 retry:
1509 if (!h2_get_buf(h2c, res)) {
1510 h2c->flags |= H2_CF_MUX_MALLOC;
1511 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001512 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001513 }
1514
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001515 ret = b_istput(res, ist2(buf.area, buf.data));
Willy Tarreaube5b7152017-09-25 16:25:39 +02001516 if (unlikely(ret <= 0)) {
1517 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001518 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1519 goto retry;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001520 h2c->flags |= H2_CF_MUX_MFULL;
1521 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001522 }
1523 else {
1524 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001525 ret = 0;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001526 }
1527 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001528 out:
1529 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001530 return ret;
1531}
1532
Willy Tarreau52eed752017-09-22 15:05:09 +02001533/* Try to receive a connection preface, then upon success try to send our
1534 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1535 * missing data. It may return an error in h2c.
1536 */
1537static int h2c_frt_recv_preface(struct h2c *h2c)
1538{
1539 int ret1;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001540 int ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001541
Willy Tarreau7838a792019-08-12 18:42:03 +02001542 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
1543
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001544 ret1 = b_isteq(&h2c->dbuf, 0, b_data(&h2c->dbuf), ist(H2_CONN_PREFACE));
Willy Tarreau52eed752017-09-22 15:05:09 +02001545
1546 if (unlikely(ret1 <= 0)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02001547 if (ret1 < 0)
1548 sess_log(h2c->conn->owner);
1549
Willy Tarreau52eed752017-09-22 15:05:09 +02001550 if (ret1 < 0 || conn_xprt_read0_pending(h2c->conn))
1551 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001552 ret2 = 0;
1553 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02001554 }
1555
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001556 ret2 = h2c_send_settings(h2c);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001557 if (ret2 > 0)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001558 b_del(&h2c->dbuf, ret1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001559 out:
1560 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001561 return ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001562}
1563
Willy Tarreau01b44822018-10-03 14:26:37 +02001564/* Try to send a connection preface, then upon success try to send our
1565 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1566 * missing data. It may return an error in h2c.
1567 */
1568static int h2c_bck_send_preface(struct h2c *h2c)
1569{
1570 struct buffer *res;
Willy Tarreau7838a792019-08-12 18:42:03 +02001571 int ret = 0;
1572
1573 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02001574
1575 if (h2c_mux_busy(h2c, NULL)) {
1576 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001577 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001578 }
1579
Willy Tarreaubcc45952019-05-26 10:05:50 +02001580 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001581 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001582 if (!h2_get_buf(h2c, res)) {
Willy Tarreau01b44822018-10-03 14:26:37 +02001583 h2c->flags |= H2_CF_MUX_MALLOC;
1584 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001585 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001586 }
1587
1588 if (!b_data(res)) {
1589 /* preface not yet sent */
Willy Tarreau9c218e72019-05-26 10:08:28 +02001590 ret = b_istput(res, ist(H2_CONN_PREFACE));
1591 if (unlikely(ret <= 0)) {
1592 if (!ret) {
1593 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1594 goto retry;
1595 h2c->flags |= H2_CF_MUX_MFULL;
1596 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001597 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001598 }
1599 else {
1600 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001601 ret = 0;
1602 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001603 }
1604 }
Willy Tarreau01b44822018-10-03 14:26:37 +02001605 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001606 ret = h2c_send_settings(h2c);
1607 out:
1608 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
1609 return ret;
Willy Tarreau01b44822018-10-03 14:26:37 +02001610}
1611
Willy Tarreau081d4722017-05-16 21:51:05 +02001612/* try to send a GOAWAY frame on the connection to report an error or a graceful
1613 * shutdown, with h2c->errcode as the error code. Returns > 0 on success or zero
1614 * if nothing was done. It uses h2c->last_sid as the advertised ID, or copies it
1615 * from h2c->max_id if it's not set yet (<0). In case of lack of room to write
1616 * the message, it subscribes the requester (either <h2s> or <h2c>) to future
1617 * notifications. It sets H2_CF_GOAWAY_SENT on success, and H2_CF_GOAWAY_FAILED
1618 * on unrecoverable failure. It will not attempt to send one again in this last
1619 * case so that it is safe to use h2c_error() to report such errors.
1620 */
1621static int h2c_send_goaway_error(struct h2c *h2c, struct h2s *h2s)
1622{
1623 struct buffer *res;
1624 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02001625 int ret = 0;
Willy Tarreau081d4722017-05-16 21:51:05 +02001626
Willy Tarreau7838a792019-08-12 18:42:03 +02001627 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
1628
1629 if (h2c->flags & H2_CF_GOAWAY_FAILED) {
1630 ret = 1; // claim that it worked
1631 goto out;
1632 }
Willy Tarreau081d4722017-05-16 21:51:05 +02001633
1634 if (h2c_mux_busy(h2c, h2s)) {
1635 if (h2s)
1636 h2s->flags |= H2_SF_BLK_MBUSY;
1637 else
1638 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001639 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001640 }
1641
Willy Tarreau9c218e72019-05-26 10:08:28 +02001642 /* len: 8, type: 7, flags: none, sid: 0 */
1643 memcpy(str, "\x00\x00\x08\x07\x00\x00\x00\x00\x00", 9);
1644
1645 if (h2c->last_sid < 0)
1646 h2c->last_sid = h2c->max_id;
1647
1648 write_n32(str + 9, h2c->last_sid);
1649 write_n32(str + 13, h2c->errcode);
1650
Willy Tarreaubcc45952019-05-26 10:05:50 +02001651 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001652 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001653 if (!h2_get_buf(h2c, res)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02001654 h2c->flags |= H2_CF_MUX_MALLOC;
1655 if (h2s)
1656 h2s->flags |= H2_SF_BLK_MROOM;
1657 else
1658 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001659 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001660 }
1661
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001662 ret = b_istput(res, ist2(str, 17));
Willy Tarreau081d4722017-05-16 21:51:05 +02001663 if (unlikely(ret <= 0)) {
1664 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001665 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1666 goto retry;
Willy Tarreau081d4722017-05-16 21:51:05 +02001667 h2c->flags |= H2_CF_MUX_MFULL;
1668 if (h2s)
1669 h2s->flags |= H2_SF_BLK_MROOM;
1670 else
1671 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001672 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001673 }
1674 else {
1675 /* we cannot report this error using GOAWAY, so we mark
1676 * it and claim a success.
1677 */
1678 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1679 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau7838a792019-08-12 18:42:03 +02001680 ret = 1;
1681 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001682 }
1683 }
1684 h2c->flags |= H2_CF_GOAWAY_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02001685 out:
1686 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
Willy Tarreau081d4722017-05-16 21:51:05 +02001687 return ret;
1688}
1689
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001690/* Try to send an RST_STREAM frame on the connection for the indicated stream
1691 * during mux operations. This stream must be valid and cannot be closed
1692 * already. h2s->id will be used for the stream ID and h2s->errcode will be
1693 * used for the error code. h2s->st will be update to H2_SS_CLOSED if it was
1694 * not yet.
1695 *
1696 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1697 * to write the message, it subscribes the stream to future notifications.
1698 */
1699static int h2s_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1700{
1701 struct buffer *res;
1702 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001703 int ret = 0;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001704
Willy Tarreau7838a792019-08-12 18:42:03 +02001705 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
1706
1707 if (!h2s || h2s->st == H2_SS_CLOSED) {
1708 ret = 1;
1709 goto out;
1710 }
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001711
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001712 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1713 * RST_STREAM in response to a RST_STREAM frame.
1714 */
Willy Tarreau231f6162019-08-06 10:01:40 +02001715 if (h2c->dsi == h2s->id && h2c->dft == H2_FT_RST_STREAM) {
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001716 ret = 1;
1717 goto ignore;
1718 }
1719
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001720 if (h2c_mux_busy(h2c, h2s)) {
1721 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001722 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001723 }
1724
Willy Tarreau9c218e72019-05-26 10:08:28 +02001725 /* len: 4, type: 3, flags: none */
1726 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1727 write_n32(str + 5, h2s->id);
1728 write_n32(str + 9, h2s->errcode);
1729
Willy Tarreaubcc45952019-05-26 10:05:50 +02001730 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001731 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001732 if (!h2_get_buf(h2c, res)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001733 h2c->flags |= H2_CF_MUX_MALLOC;
1734 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001735 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001736 }
1737
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001738 ret = b_istput(res, ist2(str, 13));
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001739 if (unlikely(ret <= 0)) {
1740 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001741 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1742 goto retry;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001743 h2c->flags |= H2_CF_MUX_MFULL;
1744 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001745 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001746 }
1747 else {
1748 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001749 ret = 0;
1750 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001751 }
1752 }
1753
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001754 ignore:
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001755 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001756 h2s_close(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001757 out:
1758 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001759 return ret;
1760}
1761
1762/* Try to send an RST_STREAM frame on the connection for the stream being
1763 * demuxed using h2c->dsi for the stream ID. It will use h2s->errcode as the
Willy Tarreaue6888ff2018-12-23 18:26:26 +01001764 * error code, even if the stream is one of the dummy ones, and will update
1765 * h2s->st to H2_SS_CLOSED if it was not yet.
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001766 *
1767 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1768 * to write the message, it blocks the demuxer and subscribes it to future
Joseph Herlantd77575d2018-11-25 10:54:45 -08001769 * notifications. It's worth mentioning that an RST may even be sent for a
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001770 * closed stream.
Willy Tarreau27a84c92017-10-17 08:10:17 +02001771 */
1772static int h2c_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1773{
1774 struct buffer *res;
1775 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001776 int ret = 0;
1777
1778 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02001779
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001780 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1781 * RST_STREAM in response to a RST_STREAM frame.
1782 */
1783 if (h2c->dft == H2_FT_RST_STREAM) {
1784 ret = 1;
1785 goto ignore;
1786 }
1787
Willy Tarreau27a84c92017-10-17 08:10:17 +02001788 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001789 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001790 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001791 }
1792
Willy Tarreau9c218e72019-05-26 10:08:28 +02001793 /* len: 4, type: 3, flags: none */
1794 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1795
1796 write_n32(str + 5, h2c->dsi);
1797 write_n32(str + 9, h2s->errcode);
1798
Willy Tarreaubcc45952019-05-26 10:05:50 +02001799 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001800 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001801 if (!h2_get_buf(h2c, res)) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02001802 h2c->flags |= H2_CF_MUX_MALLOC;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001803 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001804 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001805 }
1806
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001807 ret = b_istput(res, ist2(str, 13));
Willy Tarreau27a84c92017-10-17 08:10:17 +02001808 if (unlikely(ret <= 0)) {
1809 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001810 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1811 goto retry;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001812 h2c->flags |= H2_CF_MUX_MFULL;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001813 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001814 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001815 }
1816 else {
1817 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001818 ret = 0;
1819 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001820 }
1821 }
1822
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001823 ignore:
Willy Tarreauab0e1da2018-10-05 10:16:37 +02001824 if (h2s->id) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02001825 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001826 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001827 }
1828
Willy Tarreau7838a792019-08-12 18:42:03 +02001829 out:
1830 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02001831 return ret;
1832}
1833
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001834/* try to send an empty DATA frame with the ES flag set to notify about the
1835 * end of stream and match a shutdown(write). If an ES was already sent as
1836 * indicated by HLOC/ERROR/RESET/CLOSED states, nothing is done. Returns > 0
1837 * on success or zero if nothing was done. In case of lack of room to write the
1838 * message, it subscribes the requesting stream to future notifications.
1839 */
1840static int h2_send_empty_data_es(struct h2s *h2s)
1841{
1842 struct h2c *h2c = h2s->h2c;
1843 struct buffer *res;
1844 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02001845 int ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001846
Willy Tarreau7838a792019-08-12 18:42:03 +02001847 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
1848
1849 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED) {
1850 ret = 1;
1851 goto out;
1852 }
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001853
1854 if (h2c_mux_busy(h2c, h2s)) {
1855 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001856 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001857 }
1858
Willy Tarreau9c218e72019-05-26 10:08:28 +02001859 /* len: 0x000000, type: 0(DATA), flags: ES=1 */
1860 memcpy(str, "\x00\x00\x00\x00\x01", 5);
1861 write_n32(str + 5, h2s->id);
1862
Willy Tarreaubcc45952019-05-26 10:05:50 +02001863 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001864 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001865 if (!h2_get_buf(h2c, res)) {
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001866 h2c->flags |= H2_CF_MUX_MALLOC;
1867 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001868 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001869 }
1870
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001871 ret = b_istput(res, ist2(str, 9));
Willy Tarreau6d8b6822017-11-07 14:39:09 +01001872 if (likely(ret > 0)) {
1873 h2s->flags |= H2_SF_ES_SENT;
1874 }
1875 else if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001876 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1877 goto retry;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01001878 h2c->flags |= H2_CF_MUX_MFULL;
1879 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01001880 }
1881 else {
1882 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001883 ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001884 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001885 out:
1886 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001887 return ret;
1888}
1889
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001890/* wake a specific stream and assign its conn_stream som CS_FL_* flags among
Willy Tarreau99ad1b32019-05-14 11:46:28 +02001891 * CS_FL_ERR_PENDING and CS_FL_ERROR if needed. The stream's state
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001892 * is automatically updated accordingly. If the stream is orphaned, it is
1893 * destroyed.
Christopher Fauletf02ca002019-03-07 16:21:34 +01001894 */
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001895static void h2s_wake_one_stream(struct h2s *h2s)
Christopher Fauletf02ca002019-03-07 16:21:34 +01001896{
Willy Tarreau7838a792019-08-12 18:42:03 +02001897 struct h2c *h2c = h2s->h2c;
1898
1899 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn, h2s);
1900
Christopher Fauletf02ca002019-03-07 16:21:34 +01001901 if (!h2s->cs) {
1902 /* this stream was already orphaned */
1903 h2s_destroy(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001904 TRACE_DEVEL("leaving with no h2s", H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01001905 return;
1906 }
1907
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001908 if (conn_xprt_read0_pending(h2s->h2c->conn)) {
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001909 if (h2s->st == H2_SS_OPEN)
1910 h2s->st = H2_SS_HREM;
1911 else if (h2s->st == H2_SS_HLOC)
1912 h2s_close(h2s);
1913 }
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001914
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001915 if ((h2s->h2c->st0 >= H2_CS_ERROR || h2s->h2c->conn->flags & CO_FL_ERROR) ||
1916 (h2s->h2c->last_sid > 0 && (!h2s->id || h2s->id > h2s->h2c->last_sid))) {
1917 h2s->cs->flags |= CS_FL_ERR_PENDING;
1918 if (h2s->cs->flags & CS_FL_EOS)
1919 h2s->cs->flags |= CS_FL_ERROR;
Willy Tarreau23482912019-05-07 15:23:14 +02001920
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001921 if (h2s->st < H2_SS_ERROR)
1922 h2s->st = H2_SS_ERROR;
1923 }
Christopher Fauletf02ca002019-03-07 16:21:34 +01001924
1925 h2s_alert(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001926 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01001927}
1928
1929/* wake the streams attached to the connection, whose id is greater than <last>
1930 * or unassigned.
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001931 */
Willy Tarreau23482912019-05-07 15:23:14 +02001932static void h2_wake_some_streams(struct h2c *h2c, int last)
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001933{
1934 struct eb32_node *node;
1935 struct h2s *h2s;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001936
Willy Tarreau7838a792019-08-12 18:42:03 +02001937 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn);
1938
Christopher Fauletf02ca002019-03-07 16:21:34 +01001939 /* Wake all streams with ID > last */
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001940 node = eb32_lookup_ge(&h2c->streams_by_id, last + 1);
1941 while (node) {
1942 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001943 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001944 h2s_wake_one_stream(h2s);
Christopher Fauletf02ca002019-03-07 16:21:34 +01001945 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01001946
Christopher Fauletf02ca002019-03-07 16:21:34 +01001947 /* Wake all streams with unassigned ID (ID == 0) */
1948 node = eb32_lookup(&h2c->streams_by_id, 0);
1949 while (node) {
1950 h2s = container_of(node, struct h2s, by_id);
1951 if (h2s->id > 0)
1952 break;
1953 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001954 h2s_wake_one_stream(h2s);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001955 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001956
1957 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001958}
1959
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001960/* Wake up all blocked streams whose window size has become positive after the
1961 * mux's initial window was adjusted. This should be done after having processed
1962 * SETTINGS frames which have updated the mux's initial window size.
Willy Tarreau3421aba2017-07-27 15:41:03 +02001963 */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001964static void h2c_unblock_sfctl(struct h2c *h2c)
Willy Tarreau3421aba2017-07-27 15:41:03 +02001965{
1966 struct h2s *h2s;
1967 struct eb32_node *node;
1968
Willy Tarreau7838a792019-08-12 18:42:03 +02001969 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
1970
Willy Tarreau3421aba2017-07-27 15:41:03 +02001971 node = eb32_first(&h2c->streams_by_id);
1972 while (node) {
1973 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001974 if (h2s->flags & H2_SF_BLK_SFCTL && h2s_mws(h2s) > 0) {
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01001975 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02001976 LIST_DEL_INIT(&h2s->list);
1977 if (h2s->send_wait)
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01001978 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01001979 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02001980 node = eb32_next(node);
1981 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001982
1983 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02001984}
1985
1986/* processes a SETTINGS frame whose payload is <payload> for <plen> bytes, and
1987 * ACKs it if needed. Returns > 0 on success or zero on missing data. It may
Willy Tarreaub860c732019-01-30 15:39:55 +01001988 * return an error in h2c. The caller must have already verified frame length
1989 * and stream ID validity. Described in RFC7540#6.5.
Willy Tarreau3421aba2017-07-27 15:41:03 +02001990 */
1991static int h2c_handle_settings(struct h2c *h2c)
1992{
1993 unsigned int offset;
1994 int error;
1995
Willy Tarreau7838a792019-08-12 18:42:03 +02001996 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
1997
Willy Tarreau3421aba2017-07-27 15:41:03 +02001998 if (h2c->dff & H2_F_SETTINGS_ACK) {
1999 if (h2c->dfl) {
2000 error = H2_ERR_FRAME_SIZE_ERROR;
2001 goto fail;
2002 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002003 goto done;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002004 }
2005
Willy Tarreau3421aba2017-07-27 15:41:03 +02002006 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002007 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau7838a792019-08-12 18:42:03 +02002008 goto out0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002009
2010 /* parse the frame */
2011 for (offset = 0; offset < h2c->dfl; offset += 6) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002012 uint16_t type = h2_get_n16(&h2c->dbuf, offset);
2013 int32_t arg = h2_get_n32(&h2c->dbuf, offset + 2);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002014
2015 switch (type) {
2016 case H2_SETTINGS_INITIAL_WINDOW_SIZE:
2017 /* we need to update all existing streams with the
2018 * difference from the previous iws.
2019 */
2020 if (arg < 0) { // RFC7540#6.5.2
2021 error = H2_ERR_FLOW_CONTROL_ERROR;
2022 goto fail;
2023 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002024 h2c->miw = arg;
2025 break;
2026 case H2_SETTINGS_MAX_FRAME_SIZE:
2027 if (arg < 16384 || arg > 16777215) { // RFC7540#6.5.2
2028 error = H2_ERR_PROTOCOL_ERROR;
2029 goto fail;
2030 }
2031 h2c->mfs = arg;
2032 break;
Willy Tarreau1b38b462017-12-03 19:02:28 +01002033 case H2_SETTINGS_ENABLE_PUSH:
2034 if (arg < 0 || arg > 1) { // RFC7540#6.5.2
2035 error = H2_ERR_PROTOCOL_ERROR;
2036 goto fail;
2037 }
2038 break;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01002039 case H2_SETTINGS_MAX_CONCURRENT_STREAMS:
2040 if (h2c->flags & H2_CF_IS_BACK) {
2041 /* the limit is only for the backend; for the frontend it is our limit */
2042 if ((unsigned int)arg > h2_settings_max_concurrent_streams)
2043 arg = h2_settings_max_concurrent_streams;
2044 h2c->streams_limit = arg;
2045 }
2046 break;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002047 }
2048 }
2049
2050 /* need to ACK this frame now */
2051 h2c->st0 = H2_CS_FRAME_A;
Willy Tarreau7838a792019-08-12 18:42:03 +02002052 done:
2053 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002054 return 1;
2055 fail:
Willy Tarreau22de8d32018-09-05 19:55:58 +02002056 sess_log(h2c->conn->owner);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002057 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002058 out0:
2059 TRACE_DEVEL("leaving with missing data or error", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002060 return 0;
2061}
2062
2063/* try to send an ACK for a settings frame on the connection. Returns > 0 on
2064 * success or one of the h2_status values.
2065 */
2066static int h2c_ack_settings(struct h2c *h2c)
2067{
2068 struct buffer *res;
2069 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002070 int ret = 0;
2071
2072 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002073
2074 if (h2c_mux_busy(h2c, NULL)) {
2075 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002076 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002077 }
2078
Willy Tarreau9c218e72019-05-26 10:08:28 +02002079 memcpy(str,
2080 "\x00\x00\x00" /* length : 0 (no data) */
2081 "\x04" "\x01" /* type : 4, flags : ACK */
2082 "\x00\x00\x00\x00" /* stream ID */, 9);
2083
Willy Tarreaubcc45952019-05-26 10:05:50 +02002084 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002085 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002086 if (!h2_get_buf(h2c, res)) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02002087 h2c->flags |= H2_CF_MUX_MALLOC;
2088 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002089 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002090 }
2091
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002092 ret = b_istput(res, ist2(str, 9));
Willy Tarreau3421aba2017-07-27 15:41:03 +02002093 if (unlikely(ret <= 0)) {
2094 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002095 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2096 goto retry;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002097 h2c->flags |= H2_CF_MUX_MFULL;
2098 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002099 }
2100 else {
2101 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002102 ret = 0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002103 }
2104 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002105 out:
2106 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002107 return ret;
2108}
2109
Willy Tarreaucf68c782017-10-10 17:11:41 +02002110/* processes a PING frame and schedules an ACK if needed. The caller must pass
2111 * the pointer to the payload in <payload>. Returns > 0 on success or zero on
Willy Tarreaub860c732019-01-30 15:39:55 +01002112 * missing data. The caller must have already verified frame length
2113 * and stream ID validity.
Willy Tarreaucf68c782017-10-10 17:11:41 +02002114 */
2115static int h2c_handle_ping(struct h2c *h2c)
2116{
Willy Tarreaucf68c782017-10-10 17:11:41 +02002117 /* schedule a response */
Willy Tarreau68ed6412017-12-03 18:15:56 +01002118 if (!(h2c->dff & H2_F_PING_ACK))
Willy Tarreaucf68c782017-10-10 17:11:41 +02002119 h2c->st0 = H2_CS_FRAME_A;
2120 return 1;
2121}
2122
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002123/* Try to send a window update for stream id <sid> and value <increment>.
2124 * Returns > 0 on success or zero on missing room or failure. It may return an
2125 * error in h2c.
2126 */
2127static int h2c_send_window_update(struct h2c *h2c, int sid, uint32_t increment)
2128{
2129 struct buffer *res;
2130 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002131 int ret = 0;
2132
2133 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002134
2135 if (h2c_mux_busy(h2c, NULL)) {
2136 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002137 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002138 }
2139
Willy Tarreau9c218e72019-05-26 10:08:28 +02002140 /* length: 4, type: 8, flags: none */
2141 memcpy(str, "\x00\x00\x04\x08\x00", 5);
2142 write_n32(str + 5, sid);
2143 write_n32(str + 9, increment);
2144
Willy Tarreaubcc45952019-05-26 10:05:50 +02002145 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002146 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002147 if (!h2_get_buf(h2c, res)) {
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002148 h2c->flags |= H2_CF_MUX_MALLOC;
2149 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002150 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002151 }
2152
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002153 ret = b_istput(res, ist2(str, 13));
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002154 if (unlikely(ret <= 0)) {
2155 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002156 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2157 goto retry;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002158 h2c->flags |= H2_CF_MUX_MFULL;
2159 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002160 }
2161 else {
2162 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002163 ret = 0;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002164 }
2165 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002166 out:
2167 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002168 return ret;
2169}
2170
2171/* try to send pending window update for the connection. It's safe to call it
2172 * with no pending updates. Returns > 0 on success or zero on missing room or
2173 * failure. It may return an error in h2c.
2174 */
2175static int h2c_send_conn_wu(struct h2c *h2c)
2176{
2177 int ret = 1;
2178
Willy Tarreau7838a792019-08-12 18:42:03 +02002179 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2180
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002181 if (h2c->rcvd_c <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002182 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002183
Willy Tarreau97aaa672018-12-23 09:49:04 +01002184 if (!(h2c->flags & H2_CF_WINDOW_OPENED)) {
2185 /* increase the advertised connection window to 2G on
2186 * first update.
2187 */
2188 h2c->flags |= H2_CF_WINDOW_OPENED;
2189 h2c->rcvd_c += H2_INITIAL_WINDOW_INCREMENT;
2190 }
2191
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002192 /* send WU for the connection */
2193 ret = h2c_send_window_update(h2c, 0, h2c->rcvd_c);
2194 if (ret > 0)
2195 h2c->rcvd_c = 0;
2196
Willy Tarreau7838a792019-08-12 18:42:03 +02002197 out:
2198 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002199 return ret;
2200}
2201
2202/* try to send pending window update for the current dmux stream. It's safe to
2203 * call it with no pending updates. Returns > 0 on success or zero on missing
2204 * room or failure. It may return an error in h2c.
2205 */
2206static int h2c_send_strm_wu(struct h2c *h2c)
2207{
2208 int ret = 1;
2209
Willy Tarreau7838a792019-08-12 18:42:03 +02002210 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2211
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002212 if (h2c->rcvd_s <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002213 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002214
2215 /* send WU for the stream */
2216 ret = h2c_send_window_update(h2c, h2c->dsi, h2c->rcvd_s);
2217 if (ret > 0)
2218 h2c->rcvd_s = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002219 out:
2220 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002221 return ret;
2222}
2223
Willy Tarreaucf68c782017-10-10 17:11:41 +02002224/* try to send an ACK for a ping frame on the connection. Returns > 0 on
2225 * success, 0 on missing data or one of the h2_status values.
2226 */
2227static int h2c_ack_ping(struct h2c *h2c)
2228{
2229 struct buffer *res;
2230 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02002231 int ret = 0;
2232
2233 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002234
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002235 if (b_data(&h2c->dbuf) < 8)
Willy Tarreau7838a792019-08-12 18:42:03 +02002236 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002237
2238 if (h2c_mux_busy(h2c, NULL)) {
2239 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002240 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002241 }
2242
Willy Tarreaucf68c782017-10-10 17:11:41 +02002243 memcpy(str,
2244 "\x00\x00\x08" /* length : 8 (same payload) */
2245 "\x06" "\x01" /* type : 6, flags : ACK */
2246 "\x00\x00\x00\x00" /* stream ID */, 9);
2247
2248 /* copy the original payload */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002249 h2_get_buf_bytes(str + 9, 8, &h2c->dbuf, 0);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002250
Willy Tarreau9c218e72019-05-26 10:08:28 +02002251 res = br_tail(h2c->mbuf);
2252 retry:
2253 if (!h2_get_buf(h2c, res)) {
2254 h2c->flags |= H2_CF_MUX_MALLOC;
2255 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002256 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02002257 }
2258
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002259 ret = b_istput(res, ist2(str, 17));
Willy Tarreaucf68c782017-10-10 17:11:41 +02002260 if (unlikely(ret <= 0)) {
2261 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002262 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2263 goto retry;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002264 h2c->flags |= H2_CF_MUX_MFULL;
2265 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002266 }
2267 else {
2268 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002269 ret = 0;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002270 }
2271 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002272 out:
2273 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002274 return ret;
2275}
2276
Willy Tarreau26f95952017-07-27 17:18:30 +02002277/* processes a WINDOW_UPDATE frame whose payload is <payload> for <plen> bytes.
2278 * Returns > 0 on success or zero on missing data. It may return an error in
Willy Tarreaub860c732019-01-30 15:39:55 +01002279 * h2c or h2s. The caller must have already verified frame length and stream ID
2280 * validity. Described in RFC7540#6.9.
Willy Tarreau26f95952017-07-27 17:18:30 +02002281 */
2282static int h2c_handle_window_update(struct h2c *h2c, struct h2s *h2s)
2283{
2284 int32_t inc;
2285 int error;
2286
Willy Tarreau7838a792019-08-12 18:42:03 +02002287 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
2288
Willy Tarreau26f95952017-07-27 17:18:30 +02002289 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002290 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau7838a792019-08-12 18:42:03 +02002291 goto out0;
Willy Tarreau26f95952017-07-27 17:18:30 +02002292
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002293 inc = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau26f95952017-07-27 17:18:30 +02002294
2295 if (h2c->dsi != 0) {
2296 /* stream window update */
Willy Tarreau26f95952017-07-27 17:18:30 +02002297
2298 /* it's not an error to receive WU on a closed stream */
2299 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau7838a792019-08-12 18:42:03 +02002300 goto done;
Willy Tarreau26f95952017-07-27 17:18:30 +02002301
2302 if (!inc) {
2303 error = H2_ERR_PROTOCOL_ERROR;
2304 goto strm_err;
2305 }
2306
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002307 if (h2s_mws(h2s) >= 0 && h2s_mws(h2s) + inc < 0) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002308 error = H2_ERR_FLOW_CONTROL_ERROR;
2309 goto strm_err;
2310 }
2311
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002312 h2s->sws += inc;
2313 if (h2s_mws(h2s) > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002314 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002315 LIST_DEL_INIT(&h2s->list);
2316 if (h2s->send_wait)
Olivier Houcharddddfe312018-10-10 18:51:00 +02002317 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreau26f95952017-07-27 17:18:30 +02002318 }
2319 }
2320 else {
2321 /* connection window update */
2322 if (!inc) {
2323 error = H2_ERR_PROTOCOL_ERROR;
2324 goto conn_err;
2325 }
2326
2327 if (h2c->mws >= 0 && h2c->mws + inc < 0) {
2328 error = H2_ERR_FLOW_CONTROL_ERROR;
2329 goto conn_err;
2330 }
2331
2332 h2c->mws += inc;
2333 }
2334
Willy Tarreau7838a792019-08-12 18:42:03 +02002335 done:
2336 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002337 return 1;
2338
2339 conn_err:
2340 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002341 out0:
2342 TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002343 return 0;
2344
2345 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002346 h2s_error(h2s, error);
2347 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002348 TRACE_DEVEL("leaving on stream error", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002349 return 0;
2350}
2351
Willy Tarreaue96b0922017-10-30 00:28:29 +01002352/* processes a GOAWAY frame, and signals all streams whose ID is greater than
Willy Tarreaub860c732019-01-30 15:39:55 +01002353 * the last ID. Returns > 0 on success or zero on missing data. The caller must
2354 * have already verified frame length and stream ID validity. Described in
2355 * RFC7540#6.8.
Willy Tarreaue96b0922017-10-30 00:28:29 +01002356 */
2357static int h2c_handle_goaway(struct h2c *h2c)
2358{
Willy Tarreaue96b0922017-10-30 00:28:29 +01002359 int last;
2360
Willy Tarreau7838a792019-08-12 18:42:03 +02002361 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002362 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002363 if (b_data(&h2c->dbuf) < h2c->dfl) {
2364 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002365 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002366 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01002367
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002368 last = h2_get_n32(&h2c->dbuf, 0);
2369 h2c->errcode = h2_get_n32(&h2c->dbuf, 4);
Willy Tarreau11cc2d62017-12-03 10:27:47 +01002370 if (h2c->last_sid < 0)
2371 h2c->last_sid = last;
Willy Tarreau23482912019-05-07 15:23:14 +02002372 h2_wake_some_streams(h2c, last);
Willy Tarreau7838a792019-08-12 18:42:03 +02002373 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002374 return 1;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002375}
2376
Willy Tarreau92153fc2017-12-03 19:46:19 +01002377/* processes a PRIORITY frame, and either skips it or rejects if it is
Willy Tarreaub860c732019-01-30 15:39:55 +01002378 * invalid. Returns > 0 on success or zero on missing data. It may return an
2379 * error in h2c. The caller must have already verified frame length and stream
2380 * ID validity. Described in RFC7540#6.3.
Willy Tarreau92153fc2017-12-03 19:46:19 +01002381 */
2382static int h2c_handle_priority(struct h2c *h2c)
2383{
Willy Tarreau7838a792019-08-12 18:42:03 +02002384 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
2385
Willy Tarreau92153fc2017-12-03 19:46:19 +01002386 /* process full frame only */
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002387 if (b_data(&h2c->dbuf) < h2c->dfl) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002388 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002389 return 0;
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002390 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01002391
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002392 if (h2_get_n32(&h2c->dbuf, 0) == h2c->dsi) {
Willy Tarreau92153fc2017-12-03 19:46:19 +01002393 /* 7540#5.3 : can't depend on itself */
Willy Tarreaub860c732019-01-30 15:39:55 +01002394 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002395 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002396 return 0;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002397 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002398 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002399 return 1;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002400}
2401
Willy Tarreaucd234e92017-08-18 10:59:39 +02002402/* processes an RST_STREAM frame, and sets the 32-bit error code on the stream.
Willy Tarreaub860c732019-01-30 15:39:55 +01002403 * Returns > 0 on success or zero on missing data. The caller must have already
2404 * verified frame length and stream ID validity. Described in RFC7540#6.4.
Willy Tarreaucd234e92017-08-18 10:59:39 +02002405 */
2406static int h2c_handle_rst_stream(struct h2c *h2c, struct h2s *h2s)
2407{
Willy Tarreau7838a792019-08-12 18:42:03 +02002408 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
2409
Willy Tarreaucd234e92017-08-18 10:59:39 +02002410 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002411 if (b_data(&h2c->dbuf) < h2c->dfl) {
2412 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002413 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002414 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002415
2416 /* late RST, already handled */
Willy Tarreau7838a792019-08-12 18:42:03 +02002417 if (h2s->st == H2_SS_CLOSED) {
2418 TRACE_DEVEL("leaving on stream closed", H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002419 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002420 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002421
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002422 h2s->errcode = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau00dd0782018-03-01 16:31:34 +01002423 h2s_close(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002424
2425 if (h2s->cs) {
Willy Tarreauec988c72018-12-19 18:00:29 +01002426 cs_set_error(h2s->cs);
Willy Tarreauf830f012018-12-19 17:44:55 +01002427 h2s_alert(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002428 }
2429
2430 h2s->flags |= H2_SF_RST_RCVD;
Willy Tarreau7838a792019-08-12 18:42:03 +02002431 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002432 return 1;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002433}
2434
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002435/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2436 * It may return an error in h2c or h2s. The caller must consider that the
2437 * return value is the new h2s in case one was allocated (most common case).
2438 * Described in RFC7540#6.2. Most of the
Willy Tarreau13278b42017-10-13 19:23:14 +02002439 * errors here are reported as connection errors since it's impossible to
2440 * recover from such errors after the compression context has been altered.
2441 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002442static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau13278b42017-10-13 19:23:14 +02002443{
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002444 struct buffer rxbuf = BUF_NULL;
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002445 unsigned long long body_len = 0;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002446 uint32_t flags = 0;
Willy Tarreau13278b42017-10-13 19:23:14 +02002447 int error;
2448
Willy Tarreau7838a792019-08-12 18:42:03 +02002449 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2450
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002451 if (!b_size(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002452 goto out; // empty buffer
Willy Tarreau13278b42017-10-13 19:23:14 +02002453
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002454 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002455 goto out; // incomplete frame
Willy Tarreau13278b42017-10-13 19:23:14 +02002456
2457 /* now either the frame is complete or the buffer is complete */
2458 if (h2s->st != H2_SS_IDLE) {
Willy Tarreau88d138e2019-01-02 19:38:14 +01002459 /* The stream exists/existed, this must be a trailers frame */
2460 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreauaab1a602019-05-06 11:12:18 +02002461 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &body_len);
2462 /* unrecoverable error ? */
2463 if (h2c->st0 >= H2_CS_ERROR)
2464 goto out;
2465
2466 if (error == 0)
2467 goto out; // missing data
2468
2469 if (error < 0) {
2470 /* Failed to decode this frame (e.g. too large request)
2471 * but the HPACK decompressor is still synchronized.
2472 */
2473 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
2474 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau88d138e2019-01-02 19:38:14 +01002475 goto out;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002476 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01002477 goto done;
2478 }
Willy Tarreau1f035502019-01-30 11:44:07 +01002479 /* the connection was already killed by an RST, let's consume
2480 * the data and send another RST.
2481 */
2482 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
2483 h2s = (struct h2s*)h2_error_stream;
2484 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002485 }
2486 else if (h2c->dsi <= h2c->max_id || !(h2c->dsi & 1)) {
2487 /* RFC7540#5.1.1 stream id > prev ones, and must be odd here */
2488 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002489 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02002490 goto conn_err;
2491 }
Willy Tarreau415b1ee2019-01-02 13:59:43 +01002492 else if (h2c->flags & H2_CF_DEM_TOOMANY)
2493 goto out; // IDLE but too many cs still present
Willy Tarreau13278b42017-10-13 19:23:14 +02002494
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002495 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002496
Willy Tarreau25919232019-01-03 14:48:18 +01002497 /* unrecoverable error ? */
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002498 if (h2c->st0 >= H2_CS_ERROR)
2499 goto out;
2500
Willy Tarreau25919232019-01-03 14:48:18 +01002501 if (error <= 0) {
2502 if (error == 0)
2503 goto out; // missing data
2504
2505 /* Failed to decode this stream (e.g. too large request)
2506 * but the HPACK decompressor is still synchronized.
2507 */
2508 h2s = (struct h2s*)h2_error_stream;
2509 goto send_rst;
2510 }
2511
Willy Tarreau22de8d32018-09-05 19:55:58 +02002512 /* Note: we don't emit any other logs below because ff we return
Willy Tarreaua8e49542018-10-03 18:53:55 +02002513 * positively from h2c_frt_stream_new(), the stream will report the error,
2514 * and if we return in error, h2c_frt_stream_new() will emit the error.
Willy Tarreau22de8d32018-09-05 19:55:58 +02002515 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02002516 h2s = h2c_frt_stream_new(h2c, h2c->dsi);
Willy Tarreau13278b42017-10-13 19:23:14 +02002517 if (!h2s) {
Willy Tarreau96a10c22018-12-23 18:30:44 +01002518 h2s = (struct h2s*)h2_refused_stream;
2519 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002520 }
2521
2522 h2s->st = H2_SS_OPEN;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002523 h2s->rxbuf = rxbuf;
2524 h2s->flags |= flags;
Willy Tarreau1915ca22019-01-24 11:49:37 +01002525 h2s->body_len = body_len;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002526
Willy Tarreau88d138e2019-01-02 19:38:14 +01002527 done:
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002528 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau13278b42017-10-13 19:23:14 +02002529 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002530
2531 if (h2s->flags & H2_SF_ES_RCVD) {
Willy Tarreaufc10f592019-01-30 19:28:32 +01002532 if (h2s->st == H2_SS_OPEN)
2533 h2s->st = H2_SS_HREM;
2534 else
2535 h2s_close(h2s);
Willy Tarreau13278b42017-10-13 19:23:14 +02002536 }
2537
Willy Tarreau3a429f02019-01-03 11:41:50 +01002538 /* update the max stream ID if the request is being processed */
2539 if (h2s->id > h2c->max_id)
2540 h2c->max_id = h2s->id;
Willy Tarreau13278b42017-10-13 19:23:14 +02002541
Willy Tarreau8fecec22019-08-30 07:29:53 +02002542 TRACE_USER("rcvd H2 request ", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW, h2c->conn,, &rxbuf);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002543 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002544
2545 conn_err:
2546 h2c_error(h2c, error);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002547 goto out;
Willy Tarreau13278b42017-10-13 19:23:14 +02002548
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002549 out:
2550 h2_release_buf(h2c, &rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002551 TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002552 return NULL;
Willy Tarreau96a10c22018-12-23 18:30:44 +01002553
2554 send_rst:
2555 /* make the demux send an RST for the current stream. We may only
2556 * do this if we're certain that the HEADERS frame was properly
2557 * decompressed so that the HPACK decoder is still kept up to date.
2558 */
2559 h2_release_buf(h2c, &rxbuf);
2560 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002561
2562 TRACE_USER("rejected H2 request", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn,, &rxbuf);
2563 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau96a10c22018-12-23 18:30:44 +01002564 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002565}
2566
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002567/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2568 * It may return an error in h2c or h2s. Described in RFC7540#6.2. Most of the
2569 * errors here are reported as connection errors since it's impossible to
2570 * recover from such errors after the compression context has been altered.
2571 */
2572static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
2573{
Christopher Faulet6884aa32019-09-23 15:28:20 +02002574 struct buffer rxbuf = BUF_NULL;
2575 unsigned long long body_len = 0;
2576 uint32_t flags = 0;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002577 int error;
2578
Willy Tarreau7838a792019-08-12 18:42:03 +02002579 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2580
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002581 if (!b_size(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002582 goto fail; // empty buffer
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002583
2584 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002585 goto fail; // incomplete frame
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002586
Christopher Faulet6884aa32019-09-23 15:28:20 +02002587 if (h2s->st != H2_SS_CLOSED) {
2588 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &h2s->body_len);
2589 }
2590 else {
2591 /* the connection was already killed by an RST, let's consume
2592 * the data and send another RST.
2593 */
2594 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
Christopher Fauletea7a7782019-09-26 16:19:13 +02002595 h2s = (struct h2s*)h2_error_stream;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002596 h2c->st0 = H2_CS_FRAME_E;
2597 goto send_rst;
2598 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002599
Willy Tarreau25919232019-01-03 14:48:18 +01002600 /* unrecoverable error ? */
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002601 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002602 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002603
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002604 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2605 /* RFC7540#5.1 */
2606 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2607 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002608 goto fail;
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002609 }
2610
Willy Tarreau25919232019-01-03 14:48:18 +01002611 if (error <= 0) {
2612 if (error == 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002613 goto fail; // missing data
Willy Tarreau25919232019-01-03 14:48:18 +01002614
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002615 /* stream error : send RST_STREAM */
Willy Tarreau25919232019-01-03 14:48:18 +01002616 h2s_error(h2s, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002617 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002618 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002619 }
2620
Christopher Fauletfa922f02019-05-07 10:55:17 +02002621 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002622 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002623
Willy Tarreau927b88b2019-03-04 08:03:25 +01002624 if (h2s->cs && h2s->cs->flags & CS_FL_ERROR && h2s->st < H2_SS_ERROR)
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002625 h2s->st = H2_SS_ERROR;
Christopher Fauletfa922f02019-05-07 10:55:17 +02002626 else if (h2s->flags & H2_SF_ES_RCVD) {
2627 if (h2s->st == H2_SS_OPEN)
2628 h2s->st = H2_SS_HREM;
2629 else if (h2s->st == H2_SS_HLOC)
2630 h2s_close(h2s);
2631 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002632
Willy Tarreau8fecec22019-08-30 07:29:53 +02002633 TRACE_USER("rcvd H2 response", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn,, &h2s->rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002634 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002635 return h2s;
Willy Tarreau7838a792019-08-12 18:42:03 +02002636 fail:
2637 TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2638 return NULL;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002639
2640 send_rst:
2641 /* make the demux send an RST for the current stream. We may only
2642 * do this if we're certain that the HEADERS frame was properly
2643 * decompressed so that the HPACK decoder is still kept up to date.
2644 */
2645 h2_release_buf(h2c, &rxbuf);
2646 h2c->st0 = H2_CS_FRAME_E;
2647
2648 TRACE_USER("rejected H2 response", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn,, &rxbuf);
2649 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2650 return h2s;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002651}
2652
Willy Tarreau454f9052017-10-26 19:40:35 +02002653/* processes a DATA frame. Returns > 0 on success or zero on missing data.
2654 * It may return an error in h2c or h2s. Described in RFC7540#6.1.
2655 */
2656static int h2c_frt_handle_data(struct h2c *h2c, struct h2s *h2s)
2657{
2658 int error;
2659
Willy Tarreau7838a792019-08-12 18:42:03 +02002660 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2661
Willy Tarreau454f9052017-10-26 19:40:35 +02002662 /* note that empty DATA frames are perfectly valid and sometimes used
2663 * to signal an end of stream (with the ES flag).
2664 */
2665
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002666 if (!b_size(&h2c->dbuf) && h2c->dfl)
Willy Tarreau7838a792019-08-12 18:42:03 +02002667 goto fail; // empty buffer
Willy Tarreau454f9052017-10-26 19:40:35 +02002668
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002669 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002670 goto fail; // incomplete frame
Willy Tarreau454f9052017-10-26 19:40:35 +02002671
2672 /* now either the frame is complete or the buffer is complete */
2673
Willy Tarreau454f9052017-10-26 19:40:35 +02002674 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2675 /* RFC7540#6.1 */
2676 error = H2_ERR_STREAM_CLOSED;
2677 goto strm_err;
2678 }
2679
Christopher Faulet4f09ec82019-06-19 09:25:58 +02002680 if ((h2s->flags & H2_SF_DATA_CLEN) && (h2c->dfl - h2c->dpl) > h2s->body_len) {
Willy Tarreau1915ca22019-01-24 11:49:37 +01002681 /* RFC7540#8.1.2 */
2682 error = H2_ERR_PROTOCOL_ERROR;
2683 goto strm_err;
2684 }
2685
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002686 if (!h2_frt_transfer_data(h2s))
Willy Tarreau7838a792019-08-12 18:42:03 +02002687 goto fail;
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002688
Willy Tarreau454f9052017-10-26 19:40:35 +02002689 /* call the upper layers to process the frame, then let the upper layer
2690 * notify the stream about any change.
2691 */
2692 if (!h2s->cs) {
Willy Tarreau082c4572019-08-06 10:11:02 +02002693 /* The upper layer has already closed, this may happen on
2694 * 4xx/redirects during POST, or when receiving a response
2695 * from an H2 server after the client has aborted.
2696 */
2697 error = H2_ERR_CANCEL;
Willy Tarreau454f9052017-10-26 19:40:35 +02002698 goto strm_err;
2699 }
2700
Willy Tarreau8f650c32017-11-21 19:36:21 +01002701 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002702 goto fail;
Willy Tarreau8f650c32017-11-21 19:36:21 +01002703
Willy Tarreau721c9742017-11-07 11:05:42 +01002704 if (h2s->st >= H2_SS_ERROR) {
Willy Tarreau454f9052017-10-26 19:40:35 +02002705 /* stream error : send RST_STREAM */
Willy Tarreaua20a5192017-12-27 11:02:06 +01002706 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02002707 }
2708
2709 /* check for completion : the callee will change this to FRAME_A or
2710 * FRAME_H once done.
2711 */
2712 if (h2c->st0 == H2_CS_FRAME_P)
Willy Tarreau7838a792019-08-12 18:42:03 +02002713 goto fail;
Willy Tarreau454f9052017-10-26 19:40:35 +02002714
Willy Tarreauc4134ba2017-12-11 18:45:08 +01002715 /* last frame */
2716 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02002717 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreaufc10f592019-01-30 19:28:32 +01002718 if (h2s->st == H2_SS_OPEN)
2719 h2s->st = H2_SS_HREM;
2720 else
2721 h2s_close(h2s);
2722
Willy Tarreau1915ca22019-01-24 11:49:37 +01002723 if (h2s->flags & H2_SF_DATA_CLEN && h2s->body_len) {
2724 /* RFC7540#8.1.2 */
2725 error = H2_ERR_PROTOCOL_ERROR;
2726 goto strm_err;
2727 }
Willy Tarreauc4134ba2017-12-11 18:45:08 +01002728 }
2729
Willy Tarreau7838a792019-08-12 18:42:03 +02002730 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02002731 return 1;
2732
Willy Tarreau454f9052017-10-26 19:40:35 +02002733 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002734 h2s_error(h2s, error);
2735 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002736 fail:
2737 TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02002738 return 0;
2739}
2740
Willy Tarreau63864812019-08-07 14:25:20 +02002741/* check that the current frame described in h2c->{dsi,dft,dfl,dff,...} is
2742 * valid for the current stream state. This is needed only after parsing the
2743 * frame header but in practice it can be performed at any time during
2744 * H2_CS_FRAME_P since no state transition happens there. Returns >0 on success
2745 * or 0 in case of error, in which case either h2s or h2c will carry an error.
2746 */
2747static int h2_frame_check_vs_state(struct h2c *h2c, struct h2s *h2s)
2748{
Willy Tarreau7838a792019-08-12 18:42:03 +02002749 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
2750
Willy Tarreau63864812019-08-07 14:25:20 +02002751 if (h2s->st == H2_SS_IDLE &&
2752 h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) {
2753 /* RFC7540#5.1: any frame other than HEADERS or PRIORITY in
2754 * this state MUST be treated as a connection error
2755 */
2756 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2757 if (!h2c->nb_streams) {
2758 /* only log if no other stream can report the error */
2759 sess_log(h2c->conn->owner);
2760 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002761 TRACE_DEVEL("leaving in error (idle&!hdrs&!prio)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02002762 return 0;
2763 }
2764
2765 if (h2s->st == H2_SS_HREM && h2c->dft != H2_FT_WINDOW_UPDATE &&
2766 h2c->dft != H2_FT_RST_STREAM && h2c->dft != H2_FT_PRIORITY) {
2767 /* RFC7540#5.1: any frame other than WU/PRIO/RST in
2768 * this state MUST be treated as a stream error.
2769 * 6.2, 6.6 and 6.10 further mandate that HEADERS/
2770 * PUSH_PROMISE/CONTINUATION cause connection errors.
2771 */
2772 if (h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK)
2773 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2774 else
2775 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02002776 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 Tarreau63864812019-08-07 14:25:20 +02002777 return 0;
2778 }
2779
2780 /* Below the management of frames received in closed state is a
2781 * bit hackish because the spec makes strong differences between
2782 * streams closed by receiving RST, sending RST, and seeing ES
2783 * in both directions. In addition to this, the creation of a
2784 * new stream reusing the identifier of a closed one will be
2785 * detected here. Given that we cannot keep track of all closed
2786 * streams forever, we consider that unknown closed streams were
2787 * closed on RST received, which allows us to respond with an
2788 * RST without breaking the connection (eg: to abort a transfer).
2789 * Some frames have to be silently ignored as well.
2790 */
2791 if (h2s->st == H2_SS_CLOSED && h2c->dsi) {
2792 if (!(h2c->flags & H2_CF_IS_BACK) && h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
2793 /* #5.1.1: The identifier of a newly
2794 * established stream MUST be numerically
2795 * greater than all streams that the initiating
2796 * endpoint has opened or reserved. This
2797 * governs streams that are opened using a
2798 * HEADERS frame and streams that are reserved
2799 * using PUSH_PROMISE. An endpoint that
2800 * receives an unexpected stream identifier
2801 * MUST respond with a connection error.
2802 */
2803 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02002804 TRACE_DEVEL("leaving in error (closed&hdrmask)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02002805 return 0;
2806 }
2807
Willy Tarreau4c08f122019-09-26 08:47:15 +02002808 if (h2s->flags & H2_SF_RST_RCVD &&
2809 !(h2_ft_bit(h2c->dft) & (H2_FT_HDR_MASK | H2_FT_RST_STREAM_BIT | H2_FT_PRIORITY_BIT | H2_FT_WINDOW_UPDATE_BIT))) {
Willy Tarreau63864812019-08-07 14:25:20 +02002810 /* RFC7540#5.1:closed: an endpoint that
2811 * receives any frame other than PRIORITY after
2812 * receiving a RST_STREAM MUST treat that as a
2813 * stream error of type STREAM_CLOSED.
2814 *
2815 * Note that old streams fall into this category
2816 * and will lead to an RST being sent.
2817 *
2818 * However, we cannot generalize this to all frame types. Those
2819 * carrying compression state must still be processed before
2820 * being dropped or we'll desynchronize the decoder. This can
2821 * happen with request trailers received after sending an
2822 * RST_STREAM, or with header/trailers responses received after
2823 * sending RST_STREAM (aborted stream).
Willy Tarreau4c08f122019-09-26 08:47:15 +02002824 *
2825 * In addition, since our CLOSED streams always carry the
2826 * RST_RCVD bit, we don't want to accidently catch valid
2827 * frames for a closed stream, i.e. RST/PRIO/WU.
Willy Tarreau63864812019-08-07 14:25:20 +02002828 */
2829 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2830 h2c->st0 = H2_CS_FRAME_E;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002831 TRACE_DEVEL("leaving in error (rst_rcvd&!hdrmask)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02002832 return 0;
2833 }
2834
2835 /* RFC7540#5.1:closed: if this state is reached as a
2836 * result of sending a RST_STREAM frame, the peer that
2837 * receives the RST_STREAM might have already sent
2838 * frames on the stream that cannot be withdrawn. An
2839 * endpoint MUST ignore frames that it receives on
2840 * closed streams after it has sent a RST_STREAM
2841 * frame. An endpoint MAY choose to limit the period
2842 * over which it ignores frames and treat frames that
2843 * arrive after this time as being in error.
2844 */
2845 if (h2s->id && !(h2s->flags & H2_SF_RST_SENT)) {
2846 /* RFC7540#5.1:closed: any frame other than
2847 * PRIO/WU/RST in this state MUST be treated as
2848 * a connection error
2849 */
2850 if (h2c->dft != H2_FT_RST_STREAM &&
2851 h2c->dft != H2_FT_PRIORITY &&
2852 h2c->dft != H2_FT_WINDOW_UPDATE) {
2853 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02002854 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 Tarreau63864812019-08-07 14:25:20 +02002855 return 0;
2856 }
2857 }
2858 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002859 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02002860 return 1;
2861}
2862
Willy Tarreaubc933932017-10-09 16:21:43 +02002863/* process Rx frames to be demultiplexed */
2864static void h2_process_demux(struct h2c *h2c)
2865{
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002866 struct h2s *h2s = NULL, *tmp_h2s;
Willy Tarreau54f46e52019-01-30 15:11:03 +01002867 struct h2_fh hdr;
2868 unsigned int padlen = 0;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002869 int32_t old_iw = h2c->miw;
Willy Tarreauf3ee0692017-10-17 08:18:25 +02002870
Willy Tarreau7838a792019-08-12 18:42:03 +02002871 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
2872
Willy Tarreau081d4722017-05-16 21:51:05 +02002873 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002874 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02002875
2876 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
2877 if (h2c->st0 == H2_CS_PREFACE) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002878 TRACE_STATE("expecting preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02002879 if (h2c->flags & H2_CF_IS_BACK)
Willy Tarreau7838a792019-08-12 18:42:03 +02002880 goto out;
2881
Willy Tarreau52eed752017-09-22 15:05:09 +02002882 if (unlikely(h2c_frt_recv_preface(h2c) <= 0)) {
2883 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02002884 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002885 TRACE_PROTO("failed to receive preface", H2_EV_RX_PREFACE|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02002886 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002887 sess_log(h2c->conn->owner);
2888 }
Willy Tarreau52eed752017-09-22 15:05:09 +02002889 goto fail;
2890 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002891 TRACE_PROTO("received preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02002892
2893 h2c->max_id = 0;
2894 h2c->st0 = H2_CS_SETTINGS1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002895 TRACE_STATE("switching to SETTINGS1", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02002896 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002897
2898 if (h2c->st0 == H2_CS_SETTINGS1) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002899 /* ensure that what is pending is a valid SETTINGS frame
2900 * without an ACK.
2901 */
Willy Tarreau7838a792019-08-12 18:42:03 +02002902 TRACE_STATE("expecting settings", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002903 if (!h2_get_frame_hdr(&h2c->dbuf, &hdr)) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002904 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02002905 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002906 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 Tarreau4c3690b2017-10-10 15:16:55 +02002907 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002908 sess_log(h2c->conn->owner);
2909 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002910 goto fail;
2911 }
2912
2913 if (hdr.sid || hdr.ft != H2_FT_SETTINGS || hdr.ff & H2_F_SETTINGS_ACK) {
2914 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau7838a792019-08-12 18:42:03 +02002915 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 Tarreau4c3690b2017-10-10 15:16:55 +02002916 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2917 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002918 sess_log(h2c->conn->owner);
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002919 goto fail;
2920 }
2921
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02002922 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002923 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau7838a792019-08-12 18:42:03 +02002924 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 Tarreau4c3690b2017-10-10 15:16:55 +02002925 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
2926 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002927 sess_log(h2c->conn->owner);
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002928 goto fail;
2929 }
2930
Willy Tarreau3bf69182018-12-21 15:34:50 +01002931 /* that's OK, switch to FRAME_P to process it. This is
2932 * a SETTINGS frame whose header has already been
2933 * deleted above.
2934 */
Willy Tarreau54f46e52019-01-30 15:11:03 +01002935 padlen = 0;
2936 goto new_frame;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002937 }
Willy Tarreau52eed752017-09-22 15:05:09 +02002938 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002939
2940 /* process as many incoming frames as possible below */
Willy Tarreau7838a792019-08-12 18:42:03 +02002941 while (1) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02002942 int ret = 0;
2943
Willy Tarreau7838a792019-08-12 18:42:03 +02002944 if (!b_data(&h2c->dbuf)) {
2945 TRACE_DEVEL("no more Rx data", H2_EV_RX_FRAME, h2c->conn);
2946 break;
2947 }
2948
2949 if (h2c->st0 >= H2_CS_ERROR) {
2950 TRACE_STATE("end of connection reported", H2_EV_RX_FRAME|H2_EV_RX_EOI, h2c->conn);
Willy Tarreau7e98c052017-10-10 15:56:59 +02002951 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02002952 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002953
2954 if (h2c->st0 == H2_CS_FRAME_H) {
Willy Tarreau30d05f32019-08-06 15:49:51 +02002955 h2c->rcvd_s = 0;
2956
Willy Tarreau7838a792019-08-12 18:42:03 +02002957 TRACE_STATE("expecting H2 frame header", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
Willy Tarreaua4428bd2018-12-22 18:11:41 +01002958 if (!h2_peek_frame_hdr(&h2c->dbuf, 0, &hdr))
Willy Tarreau7e98c052017-10-10 15:56:59 +02002959 break;
2960
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02002961 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002962 TRACE_PROTO("invalid H2 frame length", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau7e98c052017-10-10 15:56:59 +02002963 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau22de8d32018-09-05 19:55:58 +02002964 if (!h2c->nb_streams) {
2965 /* only log if no other stream can report the error */
2966 sess_log(h2c->conn->owner);
2967 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002968 break;
2969 }
2970
Christopher Fauletdd2a5622019-06-18 12:22:38 +02002971 padlen = 0;
Willy Tarreau3bf69182018-12-21 15:34:50 +01002972 if (h2_ft_bit(hdr.ft) & H2_FT_PADDED_MASK && hdr.ff & H2_F_PADDED) {
2973 /* If the frame is padded (HEADERS, PUSH_PROMISE or DATA),
2974 * we read the pad length and drop it from the remaining
2975 * payload (one byte + the 9 remaining ones = 10 total
2976 * removed), so we have a frame payload starting after the
2977 * pad len. Flow controlled frames (DATA) also count the
2978 * padlen in the flow control, so it must be adjusted.
2979 */
2980 if (hdr.len < 1) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002981 TRACE_PROTO("invalid H2 padded frame length", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau3bf69182018-12-21 15:34:50 +01002982 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
2983 sess_log(h2c->conn->owner);
2984 goto fail;
2985 }
2986 hdr.len--;
2987
2988 if (b_data(&h2c->dbuf) < 10)
2989 break; // missing padlen
2990
2991 padlen = *(uint8_t *)b_peek(&h2c->dbuf, 9);
2992
2993 if (padlen > hdr.len) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002994 TRACE_PROTO("invalid H2 padding length", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau3bf69182018-12-21 15:34:50 +01002995 /* RFC7540#6.1 : pad length = length of
2996 * frame payload or greater => error.
2997 */
2998 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2999 sess_log(h2c->conn->owner);
3000 goto fail;
3001 }
3002
3003 if (h2_ft_bit(hdr.ft) & H2_FT_FC_MASK) {
3004 h2c->rcvd_c++;
3005 h2c->rcvd_s++;
3006 }
3007 b_del(&h2c->dbuf, 1);
3008 }
3009 h2_skip_frame_hdr(&h2c->dbuf);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003010
3011 new_frame:
Willy Tarreau7e98c052017-10-10 15:56:59 +02003012 h2c->dfl = hdr.len;
3013 h2c->dsi = hdr.sid;
3014 h2c->dft = hdr.ft;
3015 h2c->dff = hdr.ff;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003016 h2c->dpl = padlen;
Willy Tarreau73db4342019-09-25 07:28:44 +02003017 TRACE_STATE("rcvd H2 frame header, switching to FRAME_P state", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003018 h2c->st0 = H2_CS_FRAME_P;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003019
3020 /* check for minimum basic frame format validity */
3021 ret = h2_frame_check(h2c->dft, 1, h2c->dsi, h2c->dfl, global.tune.bufsize);
3022 if (ret != H2_ERR_NO_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003023 TRACE_PROTO("received invalid H2 frame header", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003024 h2c_error(h2c, ret);
3025 sess_log(h2c->conn->owner);
3026 goto fail;
3027 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003028 }
3029
Willy Tarreau9fd5aa82019-08-06 15:21:45 +02003030 /* Only H2_CS_FRAME_P, H2_CS_FRAME_A and H2_CS_FRAME_E here.
3031 * H2_CS_FRAME_P indicates an incomplete previous operation
3032 * (most often the first attempt) and requires some validity
3033 * checks for the frame and the current state. The two other
3034 * ones are set after completion (or abortion) and must skip
3035 * validity checks.
3036 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003037 tmp_h2s = h2c_st_by_id(h2c, h2c->dsi);
3038
Willy Tarreau567beb82018-12-18 16:52:44 +01003039 if (tmp_h2s != h2s && h2s && h2s->cs &&
3040 (b_data(&h2s->rxbuf) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003041 conn_xprt_read0_pending(h2c->conn) ||
3042 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003043 (h2s->flags & H2_SF_ES_RCVD) ||
3044 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003045 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003046 TRACE_DEVEL("notifying stream before switching SID", H2_EV_RX_FRAME|H2_EV_STRM_WAKE, h2c->conn, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003047 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003048 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003049 }
3050 h2s = tmp_h2s;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003051
Willy Tarreau63864812019-08-07 14:25:20 +02003052 if (h2c->st0 == H2_CS_FRAME_E ||
Willy Tarreau7838a792019-08-12 18:42:03 +02003053 (h2c->st0 == H2_CS_FRAME_P && !h2_frame_check_vs_state(h2c, h2s))) {
3054 TRACE_PROTO("stream error reported", H2_EV_RX_FRAME|H2_EV_PROTO_ERR, h2c->conn, h2s);
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003055 goto strm_err;
Willy Tarreau7838a792019-08-12 18:42:03 +02003056 }
Willy Tarreauc0da1962017-10-30 18:38:00 +01003057
Willy Tarreau7e98c052017-10-10 15:56:59 +02003058 switch (h2c->dft) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02003059 case H2_FT_SETTINGS:
Willy Tarreau7838a792019-08-12 18:42:03 +02003060 if (h2c->st0 == H2_CS_FRAME_P) {
3061 TRACE_PROTO("receiving H2 SETTINGS frame", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn, h2s);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003062 ret = h2c_handle_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003063 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003064
Willy Tarreau7838a792019-08-12 18:42:03 +02003065 if (h2c->st0 == H2_CS_FRAME_A) {
3066 TRACE_PROTO("sending H2 SETTINGS ACK frame", H2_EV_TX_FRAME|H2_EV_RX_SETTINGS, h2c->conn, h2s);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003067 ret = h2c_ack_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003068 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003069 break;
3070
Willy Tarreaucf68c782017-10-10 17:11:41 +02003071 case H2_FT_PING:
Willy Tarreau7838a792019-08-12 18:42:03 +02003072 if (h2c->st0 == H2_CS_FRAME_P) {
3073 TRACE_PROTO("receiving H2 PING frame", H2_EV_RX_FRAME|H2_EV_RX_PING, h2c->conn, h2s);
Willy Tarreaucf68c782017-10-10 17:11:41 +02003074 ret = h2c_handle_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003075 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003076
Willy Tarreau7838a792019-08-12 18:42:03 +02003077 if (h2c->st0 == H2_CS_FRAME_A) {
3078 TRACE_PROTO("sending H2 PING ACK frame", H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn, h2s);
Willy Tarreaucf68c782017-10-10 17:11:41 +02003079 ret = h2c_ack_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003080 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003081 break;
3082
Willy Tarreau26f95952017-07-27 17:18:30 +02003083 case H2_FT_WINDOW_UPDATE:
Willy Tarreau7838a792019-08-12 18:42:03 +02003084 if (h2c->st0 == H2_CS_FRAME_P) {
3085 TRACE_PROTO("receiving H2 WINDOW_UPDATE frame", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn, h2s);
Willy Tarreau26f95952017-07-27 17:18:30 +02003086 ret = h2c_handle_window_update(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003087 }
Willy Tarreau26f95952017-07-27 17:18:30 +02003088 break;
3089
Willy Tarreau61290ec2017-10-17 08:19:21 +02003090 case H2_FT_CONTINUATION:
Willy Tarreauea18f862018-12-22 20:19:26 +01003091 /* RFC7540#6.10: CONTINUATION may only be preceeded by
3092 * a HEADERS/PUSH_PROMISE/CONTINUATION frame. These
3093 * frames' parsers consume all following CONTINUATION
3094 * frames so this one is out of sequence.
Willy Tarreau61290ec2017-10-17 08:19:21 +02003095 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003096 TRACE_PROTO("received unexpected H2 CONTINUATION frame", H2_EV_RX_FRAME|H2_EV_RX_CONT|H2_EV_H2C_ERR, h2c->conn, h2s);
Willy Tarreauea18f862018-12-22 20:19:26 +01003097 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
3098 sess_log(h2c->conn->owner);
3099 goto fail;
Willy Tarreau61290ec2017-10-17 08:19:21 +02003100
Willy Tarreau13278b42017-10-13 19:23:14 +02003101 case H2_FT_HEADERS:
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003102 if (h2c->st0 == H2_CS_FRAME_P) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003103 TRACE_PROTO("receiving H2 HEADERS frame", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02003104 if (h2c->flags & H2_CF_IS_BACK)
3105 tmp_h2s = h2c_bck_handle_headers(h2c, h2s);
3106 else
3107 tmp_h2s = h2c_frt_handle_headers(h2c, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003108 if (tmp_h2s) {
3109 h2s = tmp_h2s;
3110 ret = 1;
3111 }
3112 }
Willy Tarreau13278b42017-10-13 19:23:14 +02003113 break;
3114
Willy Tarreau454f9052017-10-26 19:40:35 +02003115 case H2_FT_DATA:
Willy Tarreau7838a792019-08-12 18:42:03 +02003116 if (h2c->st0 == H2_CS_FRAME_P) {
3117 TRACE_PROTO("receiving H2 DATA frame", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02003118 ret = h2c_frt_handle_data(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003119 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003120
Willy Tarreau7838a792019-08-12 18:42:03 +02003121 if (h2c->st0 == H2_CS_FRAME_A) {
3122 TRACE_PROTO("sending stream WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02003123 ret = h2c_send_strm_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003124 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003125 break;
Willy Tarreaucd234e92017-08-18 10:59:39 +02003126
Willy Tarreau92153fc2017-12-03 19:46:19 +01003127 case H2_FT_PRIORITY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003128 if (h2c->st0 == H2_CS_FRAME_P) {
3129 TRACE_PROTO("receiving H2 PRIORITY frame", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn, h2s);
Willy Tarreau92153fc2017-12-03 19:46:19 +01003130 ret = h2c_handle_priority(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003131 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01003132 break;
3133
Willy Tarreaucd234e92017-08-18 10:59:39 +02003134 case H2_FT_RST_STREAM:
Willy Tarreau7838a792019-08-12 18:42:03 +02003135 if (h2c->st0 == H2_CS_FRAME_P) {
3136 TRACE_PROTO("receiving H2 RST_STREAM frame", H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02003137 ret = h2c_handle_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003138 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02003139 break;
3140
Willy Tarreaue96b0922017-10-30 00:28:29 +01003141 case H2_FT_GOAWAY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003142 if (h2c->st0 == H2_CS_FRAME_P) {
3143 TRACE_PROTO("receiving H2 GOAWAY frame", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn, h2s);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003144 ret = h2c_handle_goaway(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003145 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01003146 break;
3147
Willy Tarreau1c661982017-10-30 13:52:01 +01003148 /* implement all extra frame types here */
Willy Tarreau7e98c052017-10-10 15:56:59 +02003149 default:
Willy Tarreau7838a792019-08-12 18:42:03 +02003150 TRACE_PROTO("receiving H2 ignored frame", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003151 /* drop frames that we ignore. They may be larger than
3152 * the buffer so we drain all of their contents until
3153 * we reach the end.
3154 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003155 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3156 b_del(&h2c->dbuf, ret);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003157 h2c->dfl -= ret;
3158 ret = h2c->dfl == 0;
3159 }
3160
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003161 strm_err:
Willy Tarreaua20a5192017-12-27 11:02:06 +01003162 /* We may have to send an RST if not done yet */
Willy Tarreau7838a792019-08-12 18:42:03 +02003163 if (h2s->st == H2_SS_ERROR) {
3164 TRACE_STATE("stream error, switching to FRAME_E", H2_EV_RX_FRAME|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreaua20a5192017-12-27 11:02:06 +01003165 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003166 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003167
Willy Tarreau7838a792019-08-12 18:42:03 +02003168 if (h2c->st0 == H2_CS_FRAME_E) {
3169 TRACE_PROTO("sending H2 RST_STREAM frame", H2_EV_TX_FRAME|H2_EV_TX_RST|H2_EV_TX_EOI, h2c->conn, h2s);
Willy Tarreaua20a5192017-12-27 11:02:06 +01003170 ret = h2c_send_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003171 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003172
Willy Tarreau7e98c052017-10-10 15:56:59 +02003173 /* error or missing data condition met above ? */
Willy Tarreau7838a792019-08-12 18:42:03 +02003174 if (ret <= 0) {
3175 TRACE_DEVEL("insufficient data to proceed", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003176 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003177 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003178
3179 if (h2c->st0 != H2_CS_FRAME_H) {
Christopher Faulet5112a602019-09-26 16:38:28 +02003180 TRACE_DEVEL("stream error, skip frame payload", H2_EV_RX_FRAME, h2c->conn, h2s);
3181 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3182 b_del(&h2c->dbuf, ret);
3183 h2c->dfl -= ret;
3184 if (!h2c->dfl) {
3185 TRACE_STATE("switching to FRAME_H", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
3186 h2c->st0 = H2_CS_FRAME_H;
3187 h2c->dsi = -1;
3188 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003189 }
3190 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003191
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003192 if (h2c->rcvd_c > 0 &&
Willy Tarreau7838a792019-08-12 18:42:03 +02003193 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))) {
3194 TRACE_PROTO("sending H2 WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003195 h2c_send_conn_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003196 }
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003197
Willy Tarreau52eed752017-09-22 15:05:09 +02003198 fail:
3199 /* we can go here on missing data, blocked response or error */
Willy Tarreau567beb82018-12-18 16:52:44 +01003200 if (h2s && h2s->cs &&
3201 (b_data(&h2s->rxbuf) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003202 conn_xprt_read0_pending(h2c->conn) ||
3203 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003204 (h2s->flags & H2_SF_ES_RCVD) ||
3205 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003206 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003207 TRACE_DEVEL("notifying stream before switching SID", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003208 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003209 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003210 }
Willy Tarreau1ed87b72018-11-25 08:45:16 +01003211
Willy Tarreau7838a792019-08-12 18:42:03 +02003212 if (old_iw != h2c->miw) {
3213 TRACE_STATE("notifying streams about SFCTL increase", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003214 h2c_unblock_sfctl(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003215 }
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003216
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003217 h2c_restart_reading(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02003218 out:
3219 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreaubc933932017-10-09 16:21:43 +02003220}
3221
3222/* process Tx frames from streams to be multiplexed. Returns > 0 if it reached
3223 * the end.
3224 */
3225static int h2_process_mux(struct h2c *h2c)
3226{
Olivier Houchard998410a2019-04-15 19:23:37 +02003227 struct h2s *h2s, *h2s_back;
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003228
Willy Tarreau7838a792019-08-12 18:42:03 +02003229 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3230
Willy Tarreau01b44822018-10-03 14:26:37 +02003231 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3232 if (unlikely(h2c->st0 == H2_CS_PREFACE && (h2c->flags & H2_CF_IS_BACK))) {
3233 if (unlikely(h2c_bck_send_preface(h2c) <= 0)) {
3234 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
3235 if (h2c->st0 == H2_CS_ERROR) {
3236 h2c->st0 = H2_CS_ERROR2;
3237 sess_log(h2c->conn->owner);
3238 }
3239 goto fail;
3240 }
3241 h2c->st0 = H2_CS_SETTINGS1;
3242 }
3243 /* need to wait for the other side */
Willy Tarreau75a930a2018-12-12 08:03:58 +01003244 if (h2c->st0 < H2_CS_FRAME_H)
Willy Tarreau7838a792019-08-12 18:42:03 +02003245 goto done;
Willy Tarreau01b44822018-10-03 14:26:37 +02003246 }
3247
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003248 /* start by sending possibly pending window updates */
Willy Tarreaue74679a2019-08-06 15:39:32 +02003249 if (h2c->rcvd_s > 0 &&
3250 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3251 h2c_send_strm_wu(h2c) < 0)
3252 goto fail;
3253
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003254 if (h2c->rcvd_c > 0 &&
3255 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3256 h2c_send_conn_wu(h2c) < 0)
3257 goto fail;
3258
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003259 /* First we always process the flow control list because the streams
3260 * waiting there were already elected for immediate emission but were
3261 * blocked just on this.
3262 */
3263
Olivier Houchard998410a2019-04-15 19:23:37 +02003264 list_for_each_entry_safe(h2s, h2s_back, &h2c->fctl_list, list) {
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003265 if (h2c->mws <= 0 || h2c->flags & H2_CF_MUX_BLOCK_ANY ||
3266 h2c->st0 >= H2_CS_ERROR)
3267 break;
Olivier Houchard998410a2019-04-15 19:23:37 +02003268
Willy Tarreauc234ae32019-05-13 17:56:11 +02003269 if (LIST_ADDED(&h2s->sending_list))
Olivier Houchardd360ac62019-03-22 17:37:16 +01003270 continue;
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003271
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003272 h2s->flags &= ~H2_SF_BLK_ANY;
Olivier Houchard998410a2019-04-15 19:23:37 +02003273 /* For some reason, the upper layer failed to subsribe again,
3274 * so remove it from the send_list
3275 */
3276 if (!h2s->send_wait) {
3277 LIST_DEL_INIT(&h2s->list);
3278 continue;
3279 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003280 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Olivier Houchardd360ac62019-03-22 17:37:16 +01003281 LIST_ADDQ(&h2c->sending_list, &h2s->sending_list);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003282 tasklet_wakeup(h2s->send_wait->tasklet);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003283 }
3284
Olivier Houchard998410a2019-04-15 19:23:37 +02003285 list_for_each_entry_safe(h2s, h2s_back, &h2c->send_list, list) {
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003286 if (h2c->st0 >= H2_CS_ERROR || h2c->flags & H2_CF_MUX_BLOCK_ANY)
3287 break;
Olivier Houchard998410a2019-04-15 19:23:37 +02003288
Willy Tarreauc234ae32019-05-13 17:56:11 +02003289 if (LIST_ADDED(&h2s->sending_list))
Olivier Houchardd360ac62019-03-22 17:37:16 +01003290 continue;
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003291
Olivier Houchard998410a2019-04-15 19:23:37 +02003292 /* For some reason, the upper layer failed to subsribe again,
3293 * so remove it from the send_list
3294 */
3295 if (!h2s->send_wait) {
3296 LIST_DEL_INIT(&h2s->list);
3297 continue;
3298 }
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003299 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003300 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Olivier Houchardd360ac62019-03-22 17:37:16 +01003301 LIST_ADDQ(&h2c->sending_list, &h2s->sending_list);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003302 tasklet_wakeup(h2s->send_wait->tasklet);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003303 }
3304
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003305 fail:
Willy Tarreau3eabe9b2017-11-07 11:03:01 +01003306 if (unlikely(h2c->st0 >= H2_CS_ERROR)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02003307 if (h2c->st0 == H2_CS_ERROR) {
3308 if (h2c->max_id >= 0) {
3309 h2c_send_goaway_error(h2c, NULL);
3310 if (h2c->flags & H2_CF_MUX_BLOCK_ANY)
Willy Tarreau7838a792019-08-12 18:42:03 +02003311 goto out0;
Willy Tarreau081d4722017-05-16 21:51:05 +02003312 }
3313
3314 h2c->st0 = H2_CS_ERROR2; // sent (or failed hard) !
3315 }
Willy Tarreau081d4722017-05-16 21:51:05 +02003316 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003317 done:
3318 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
3319 return 1;
3320 out0:
3321 TRACE_DEVEL("leaving in blocked situation", H2_EV_H2C_WAKE, h2c->conn);
3322 return 0;
Willy Tarreaubc933932017-10-09 16:21:43 +02003323}
3324
Willy Tarreau62f52692017-10-08 23:01:42 +02003325
Willy Tarreau479998a2018-11-18 06:30:59 +01003326/* Attempt to read data, and subscribe if none available.
3327 * The function returns 1 if data has been received, otherwise zero.
3328 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003329static int h2_recv(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003330{
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003331 struct connection *conn = h2c->conn;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003332 struct buffer *buf;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003333 int max;
Olivier Houchard7505f942018-08-21 18:10:44 +02003334 size_t ret;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003335
Willy Tarreau7838a792019-08-12 18:42:03 +02003336 TRACE_ENTER(H2_EV_H2C_RECV, h2c->conn);
3337
3338 if (h2c->wait_event.events & SUB_RETRY_RECV) {
3339 TRACE_DEVEL("leaving on sub_recv", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003340 return (b_data(&h2c->dbuf));
Willy Tarreau7838a792019-08-12 18:42:03 +02003341 }
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003342
Willy Tarreau7838a792019-08-12 18:42:03 +02003343 if (!h2_recv_allowed(h2c)) {
3344 TRACE_DEVEL("leaving on !recv_allowed", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003345 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003346 }
Willy Tarreaua2af5122017-10-09 11:56:46 +02003347
Willy Tarreau44e973f2018-03-01 17:49:30 +01003348 buf = h2_get_buf(h2c, &h2c->dbuf);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003349 if (!buf) {
3350 h2c->flags |= H2_CF_DEM_DALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02003351 TRACE_DEVEL("leaving on !alloc", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003352 return 0;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003353 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003354
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003355 b_realign_if_empty(buf);
3356 if (!b_data(buf)) {
3357 /* try to pre-align the buffer like the
3358 * rxbufs will be to optimize memory copies. We'll make
3359 * sure that the frame header lands at the end of the
3360 * HTX block to alias it upon recv. We cannot use the
3361 * head because rcv_buf() will realign the buffer if
3362 * it's empty. Thus we cheat and pretend we already
3363 * have a few bytes there.
3364 */
3365 max = buf_room_for_htx_data(buf) + 9;
3366 buf->head = sizeof(struct htx) - 9;
3367 }
3368 else
3369 max = b_room(buf);
Willy Tarreau2a59e872018-12-12 08:23:47 +01003370
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003371 ret = max ? conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0) : 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003372
Willy Tarreau7838a792019-08-12 18:42:03 +02003373 if (max && !ret && h2_recv_allowed(h2c)) {
3374 TRACE_DATA("failed to receive data, subscribing", H2_EV_H2C_RECV, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003375 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003376 } else if (ret)
3377 TRACE_DATA("received data", H2_EV_H2C_RECV, h2c->conn,,, (void*)(long)ret);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003378
Olivier Houcharda1411e62018-08-17 18:42:48 +02003379 if (!b_data(buf)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +01003380 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02003381 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard46677732018-11-29 17:06:17 +01003382 return (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003383 }
3384
Willy Tarreau7838a792019-08-12 18:42:03 +02003385 if (b_data(buf) == buf->size) {
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003386 h2c->flags |= H2_CF_DEM_DFULL;
Willy Tarreau35fb8462019-10-02 11:05:46 +02003387 TRACE_STATE("demux buffer full", H2_EV_H2C_RECV|H2_EV_H2C_BLK, h2c->conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003388 }
3389
3390 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003391 return !!ret || (conn->flags & CO_FL_ERROR) || conn_xprt_read0_pending(conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003392}
3393
Willy Tarreau479998a2018-11-18 06:30:59 +01003394/* Try to send data if possible.
3395 * The function returns 1 if data have been sent, otherwise zero.
3396 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003397static int h2_send(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003398{
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003399 struct connection *conn = h2c->conn;
Willy Tarreaubc933932017-10-09 16:21:43 +02003400 int done;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003401 int sent = 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003402
Willy Tarreau7838a792019-08-12 18:42:03 +02003403 TRACE_ENTER(H2_EV_H2C_SEND, h2c->conn);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003404
Willy Tarreau7838a792019-08-12 18:42:03 +02003405 if (conn->flags & CO_FL_ERROR) {
3406 TRACE_DEVEL("leaving on error", H2_EV_H2C_SEND, h2c->conn);
3407 return 1;
3408 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003409
Willy Tarreaua2af5122017-10-09 11:56:46 +02003410 if (conn->flags & (CO_FL_HANDSHAKE|CO_FL_WAIT_L4_CONN|CO_FL_WAIT_L6_CONN)) {
3411 /* a handshake was requested */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003412 goto schedule;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003413 }
3414
Willy Tarreaubc933932017-10-09 16:21:43 +02003415 /* This loop is quite simple : it tries to fill as much as it can from
3416 * pending streams into the existing buffer until it's reportedly full
3417 * or the end of send requests is reached. Then it tries to send this
3418 * buffer's contents out, marks it not full if at least one byte could
3419 * be sent, and tries again.
3420 *
3421 * The snd_buf() function normally takes a "flags" argument which may
3422 * be made of a combination of CO_SFL_MSG_MORE to indicate that more
3423 * data immediately comes and CO_SFL_STREAMER to indicate that the
3424 * connection is streaming lots of data (used to increase TLS record
3425 * size at the expense of latency). The former can be sent any time
3426 * there's a buffer full flag, as it indicates at least one stream
3427 * attempted to send and failed so there are pending data. An
3428 * alternative would be to set it as long as there's an active stream
3429 * but that would be problematic for ACKs until we have an absolute
3430 * guarantee that all waiters have at least one byte to send. The
3431 * latter should possibly not be set for now.
3432 */
3433
3434 done = 0;
3435 while (!done) {
3436 unsigned int flags = 0;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003437 unsigned int released = 0;
3438 struct buffer *buf;
Willy Tarreaubc933932017-10-09 16:21:43 +02003439
3440 /* fill as much as we can into the current buffer */
3441 while (((h2c->flags & (H2_CF_MUX_MFULL|H2_CF_MUX_MALLOC)) == 0) && !done)
3442 done = h2_process_mux(h2c);
3443
Olivier Houchard2b094432019-01-29 18:28:36 +01003444 if (h2c->flags & H2_CF_MUX_MALLOC)
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003445 done = 1; // we won't go further without extra buffers
Olivier Houchard2b094432019-01-29 18:28:36 +01003446
Willy Tarreaubc933932017-10-09 16:21:43 +02003447 if (conn->flags & CO_FL_ERROR)
3448 break;
3449
3450 if (h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))
3451 flags |= CO_SFL_MSG_MORE;
3452
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003453 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3454 if (b_data(buf)) {
3455 int ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, buf, b_data(buf), flags);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003456 if (!ret) {
3457 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003458 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003459 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003460 sent = 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003461 TRACE_DATA("sent data", H2_EV_H2C_SEND, h2c->conn,, buf, (void*)(long)ret);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003462 b_del(buf, ret);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003463 if (b_data(buf)) {
3464 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003465 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003466 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003467 }
3468 b_free(buf);
3469 released++;
Willy Tarreau787db9a2018-06-14 18:31:46 +02003470 }
Willy Tarreaubc933932017-10-09 16:21:43 +02003471
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003472 if (released)
Willy Tarreau201840a2019-05-29 17:50:48 +02003473 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003474
Willy Tarreaubc933932017-10-09 16:21:43 +02003475 /* wrote at least one byte, the buffer is not full anymore */
3476 h2c->flags &= ~(H2_CF_MUX_MFULL | H2_CF_DEM_MROOM);
3477 }
3478
Willy Tarreaua2af5122017-10-09 11:56:46 +02003479 if (conn->flags & CO_FL_SOCK_WR_SH) {
3480 /* output closed, nothing to send, clear the buffer to release it */
Willy Tarreau51330962019-05-26 09:38:07 +02003481 b_reset(br_tail(h2c->mbuf));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003482 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02003483 /* We're not full anymore, so we can wake any task that are waiting
3484 * for us.
3485 */
Willy Tarreaucec60052019-09-25 07:57:31 +02003486 if (!(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM)) && h2c->st0 >= H2_CS_FRAME_H) {
Olivier Houchardd360ac62019-03-22 17:37:16 +01003487 struct h2s *h2s;
3488
3489 list_for_each_entry(h2s, &h2c->send_list, list) {
3490 if (h2c->st0 >= H2_CS_ERROR || h2c->flags & H2_CF_MUX_BLOCK_ANY)
3491 break;
Olivier Houchard998410a2019-04-15 19:23:37 +02003492
Willy Tarreauc234ae32019-05-13 17:56:11 +02003493 if (LIST_ADDED(&h2s->sending_list))
Olivier Houchardd360ac62019-03-22 17:37:16 +01003494 continue;
3495
Olivier Houchard998410a2019-04-15 19:23:37 +02003496 /* For some reason, the upper layer failed to subsribe again,
3497 * so remove it from the send_list
3498 */
3499 if (!h2s->send_wait) {
3500 LIST_DEL_INIT(&h2s->list);
3501 continue;
3502 }
Olivier Houchardd360ac62019-03-22 17:37:16 +01003503 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003504 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Willy Tarreau7838a792019-08-12 18:42:03 +02003505 TRACE_DEVEL("waking up pending stream", H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn, h2s);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003506 tasklet_wakeup(h2s->send_wait->tasklet);
Olivier Houchardd360ac62019-03-22 17:37:16 +01003507 LIST_ADDQ(&h2c->sending_list, &h2s->sending_list);
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02003508 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02003509 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003510 /* We're done, no more to send */
Willy Tarreau7838a792019-08-12 18:42:03 +02003511 if (!br_data(h2c->mbuf)) {
3512 TRACE_DEVEL("leaving with everything sent", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003513 return sent;
Willy Tarreau7838a792019-08-12 18:42:03 +02003514 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003515schedule:
Willy Tarreau7838a792019-08-12 18:42:03 +02003516 if (!(conn->flags & CO_FL_ERROR) && !(h2c->wait_event.events & SUB_RETRY_SEND)) {
3517 TRACE_STATE("more data to send, subscribing", H2_EV_H2C_SEND, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003518 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003519 }
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003520
Willy Tarreau7838a792019-08-12 18:42:03 +02003521 TRACE_DEVEL("leaving with some data left to send", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003522 return sent;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003523}
3524
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003525/* this is the tasklet referenced in h2c->wait_event.tasklet */
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003526static struct task *h2_io_cb(struct task *t, void *ctx, unsigned short status)
3527{
3528 struct h2c *h2c = ctx;
Olivier Houchard7505f942018-08-21 18:10:44 +02003529 int ret = 0;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003530
Willy Tarreau7838a792019-08-12 18:42:03 +02003531 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3532
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003533 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchard7505f942018-08-21 18:10:44 +02003534 ret = h2_send(h2c);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003535 if (!(h2c->wait_event.events & SUB_RETRY_RECV))
Olivier Houchard7505f942018-08-21 18:10:44 +02003536 ret |= h2_recv(h2c);
Willy Tarreaucef5c8e2018-12-18 10:29:54 +01003537 if (ret || b_data(&h2c->dbuf))
Olivier Houchard7505f942018-08-21 18:10:44 +02003538 h2_process(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003539
3540 TRACE_LEAVE(H2_EV_H2C_WAKE);
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003541 return NULL;
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003542}
Willy Tarreaua2af5122017-10-09 11:56:46 +02003543
Willy Tarreau62f52692017-10-08 23:01:42 +02003544/* callback called on any event by the connection handler.
3545 * It applies changes and returns zero, or < 0 if it wants immediate
3546 * destruction of the connection (which normally doesn not happen in h2).
3547 */
Olivier Houchard7505f942018-08-21 18:10:44 +02003548static int h2_process(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003549{
Olivier Houchard7505f942018-08-21 18:10:44 +02003550 struct connection *conn = h2c->conn;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003551
Willy Tarreau7838a792019-08-12 18:42:03 +02003552 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3553
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003554 if (b_data(&h2c->dbuf) && !(h2c->flags & H2_CF_DEM_BLOCK_ANY)) {
Willy Tarreaud13bf272017-12-14 10:34:52 +01003555 h2_process_demux(h2c);
3556
3557 if (h2c->st0 >= H2_CS_ERROR || conn->flags & CO_FL_ERROR)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003558 b_reset(&h2c->dbuf);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003559
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003560 if (!b_full(&h2c->dbuf))
Willy Tarreaud13bf272017-12-14 10:34:52 +01003561 h2c->flags &= ~H2_CF_DEM_DFULL;
3562 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003563 h2_send(h2c);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003564
Willy Tarreau0b37d652018-10-03 10:33:02 +02003565 if (unlikely(h2c->proxy->state == PR_STSTOPPED)) {
Willy Tarreau8ec14062017-12-30 18:08:13 +01003566 /* frontend is stopping, reload likely in progress, let's try
3567 * to announce a graceful shutdown if not yet done. We don't
3568 * care if it fails, it will be tried again later.
3569 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003570 TRACE_STATE("proxy stopped, sending GOAWAY", H2_EV_H2C_WAKE|H2_EV_TX_FRAME, conn);
Willy Tarreau8ec14062017-12-30 18:08:13 +01003571 if (!(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
3572 if (h2c->last_sid < 0)
3573 h2c->last_sid = (1U << 31) - 1;
3574 h2c_send_goaway_error(h2c, NULL);
3575 }
3576 }
3577
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003578 /*
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003579 * If we received early data, and the handshake is done, wake
3580 * any stream that was waiting for it.
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003581 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003582 if (!(h2c->flags & H2_CF_WAIT_FOR_HS) &&
3583 (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_HANDSHAKE | CO_FL_EARLY_DATA)) == CO_FL_EARLY_DATA) {
3584 struct eb32_node *node;
3585 struct h2s *h2s;
3586
3587 h2c->flags |= H2_CF_WAIT_FOR_HS;
3588 node = eb32_lookup_ge(&h2c->streams_by_id, 1);
3589
3590 while (node) {
3591 h2s = container_of(node, struct h2s, by_id);
Willy Tarreaufde287c2018-12-19 18:33:16 +01003592 if (h2s->cs && h2s->cs->flags & CS_FL_WAIT_FOR_HS)
Willy Tarreau7e094452018-12-19 18:08:52 +01003593 h2s_notify_recv(h2s);
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003594 node = eb32_next(node);
3595 }
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003596 }
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003597
Willy Tarreau26bd7612017-10-09 16:47:04 +02003598 if (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn) ||
Willy Tarreau29a98242017-10-31 06:59:15 +01003599 h2c->st0 == H2_CS_ERROR2 || h2c->flags & H2_CF_GOAWAY_FAILED ||
3600 (eb_is_empty(&h2c->streams_by_id) && h2c->last_sid >= 0 &&
3601 h2c->max_id >= h2c->last_sid)) {
Willy Tarreau23482912019-05-07 15:23:14 +02003602 h2_wake_some_streams(h2c, 0);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003603
3604 if (eb_is_empty(&h2c->streams_by_id)) {
3605 /* no more stream, kill the connection now */
Christopher Faulet73c12072019-04-08 11:23:22 +02003606 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003607 TRACE_DEVEL("leaving after releasing the connection", H2_EV_H2C_WAKE);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003608 return -1;
3609 }
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003610 }
3611
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003612 if (!b_data(&h2c->dbuf))
Willy Tarreau44e973f2018-03-01 17:49:30 +01003613 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003614
Olivier Houchard53216e72018-10-10 15:46:36 +02003615 if ((conn->flags & CO_FL_SOCK_WR_SH) ||
3616 h2c->st0 == H2_CS_ERROR2 || (h2c->flags & H2_CF_GOAWAY_FAILED) ||
3617 (h2c->st0 != H2_CS_ERROR &&
Willy Tarreau662fafc2019-05-26 09:43:07 +02003618 !br_data(h2c->mbuf) &&
Olivier Houchard53216e72018-10-10 15:46:36 +02003619 (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) &&
3620 ((h2c->flags & H2_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&h2c->send_list))))
Willy Tarreau2e3c0002019-05-26 09:45:23 +02003621 h2_release_mbuf(h2c);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003622
Willy Tarreau3f133572017-10-31 19:21:06 +01003623 if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02003624 if (h2c_may_expire(h2c))
3625 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
3626 else
3627 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02003628 task_queue(h2c->task);
Willy Tarreauea392822017-10-31 10:02:25 +01003629 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003630
Olivier Houchard7505f942018-08-21 18:10:44 +02003631 h2_send(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003632 TRACE_LEAVE(H2_EV_H2C_WAKE, conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003633 return 0;
3634}
3635
Willy Tarreau749f5ca2019-03-21 19:19:36 +01003636/* wake-up function called by the connection layer (mux_ops.wake) */
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003637static int h2_wake(struct connection *conn)
3638{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003639 struct h2c *h2c = conn->ctx;
Willy Tarreau7838a792019-08-12 18:42:03 +02003640 int ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003641
Willy Tarreau7838a792019-08-12 18:42:03 +02003642 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3643 ret = h2_process(h2c);
3644 TRACE_LEAVE(H2_EV_H2C_WAKE);
3645 return ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003646}
3647
Willy Tarreauea392822017-10-31 10:02:25 +01003648/* Connection timeout management. The principle is that if there's no receipt
3649 * nor sending for a certain amount of time, the connection is closed. If the
3650 * MUX buffer still has lying data or is not allocatable, the connection is
3651 * immediately killed. If it's allocatable and empty, we attempt to send a
3652 * GOAWAY frame.
3653 */
Olivier Houchard9f6af332018-05-25 14:04:04 +02003654static struct task *h2_timeout_task(struct task *t, void *context, unsigned short state)
Willy Tarreauea392822017-10-31 10:02:25 +01003655{
Olivier Houchard9f6af332018-05-25 14:04:04 +02003656 struct h2c *h2c = context;
Willy Tarreauea392822017-10-31 10:02:25 +01003657 int expired = tick_is_expired(t->expire, now_ms);
3658
Willy Tarreau7838a792019-08-12 18:42:03 +02003659 TRACE_ENTER(H2_EV_H2C_WAKE, h2c ? h2c->conn : NULL);
3660
3661 if (!expired && h2c) {
3662 TRACE_DEVEL("leaving (not expired)", H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreauea392822017-10-31 10:02:25 +01003663 return t;
Willy Tarreau7838a792019-08-12 18:42:03 +02003664 }
Willy Tarreauea392822017-10-31 10:02:25 +01003665
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02003666 if (h2c && !h2c_may_expire(h2c)) {
3667 /* we do still have streams but all of them are idle, waiting
3668 * for the data layer, so we must not enforce the timeout here.
3669 */
3670 t->expire = TICK_ETERNITY;
3671 return t;
3672 }
3673
Olivier Houchard3f795f72019-04-17 22:51:06 +02003674 task_destroy(t);
Willy Tarreau0975f112018-03-29 15:22:59 +02003675
3676 if (!h2c) {
3677 /* resources were already deleted */
Willy Tarreau7838a792019-08-12 18:42:03 +02003678 TRACE_DEVEL("leaving (not more h2c)", H2_EV_H2C_WAKE);
Willy Tarreau0975f112018-03-29 15:22:59 +02003679 return NULL;
3680 }
3681
3682 h2c->task = NULL;
Willy Tarreauea392822017-10-31 10:02:25 +01003683 h2c_error(h2c, H2_ERR_NO_ERROR);
Willy Tarreau23482912019-05-07 15:23:14 +02003684 h2_wake_some_streams(h2c, 0);
Willy Tarreauea392822017-10-31 10:02:25 +01003685
Willy Tarreau662fafc2019-05-26 09:43:07 +02003686 if (br_data(h2c->mbuf)) {
Willy Tarreauea392822017-10-31 10:02:25 +01003687 /* don't even try to send a GOAWAY, the buffer is stuck */
3688 h2c->flags |= H2_CF_GOAWAY_FAILED;
3689 }
3690
3691 /* try to send but no need to insist */
Willy Tarreau599391a2017-11-24 10:16:00 +01003692 h2c->last_sid = h2c->max_id;
Willy Tarreauea392822017-10-31 10:02:25 +01003693 if (h2c_send_goaway_error(h2c, NULL) <= 0)
3694 h2c->flags |= H2_CF_GOAWAY_FAILED;
3695
Willy Tarreau662fafc2019-05-26 09:43:07 +02003696 if (br_data(h2c->mbuf) && !(h2c->flags & H2_CF_GOAWAY_FAILED) && conn_xprt_ready(h2c->conn)) {
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003697 unsigned int released = 0;
3698 struct buffer *buf;
3699
3700 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3701 if (b_data(buf)) {
3702 int ret = h2c->conn->xprt->snd_buf(h2c->conn, h2c->conn->xprt_ctx, buf, b_data(buf), 0);
3703 if (!ret)
3704 break;
3705 b_del(buf, ret);
3706 if (b_data(buf))
3707 break;
3708 b_free(buf);
3709 released++;
3710 }
Willy Tarreau787db9a2018-06-14 18:31:46 +02003711 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003712
3713 if (released)
Willy Tarreau201840a2019-05-29 17:50:48 +02003714 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau787db9a2018-06-14 18:31:46 +02003715 }
Willy Tarreauea392822017-10-31 10:02:25 +01003716
Willy Tarreau0975f112018-03-29 15:22:59 +02003717 /* either we can release everything now or it will be done later once
3718 * the last stream closes.
3719 */
3720 if (eb_is_empty(&h2c->streams_by_id))
Christopher Faulet73c12072019-04-08 11:23:22 +02003721 h2_release(h2c);
Willy Tarreauea392822017-10-31 10:02:25 +01003722
Willy Tarreau7838a792019-08-12 18:42:03 +02003723 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreauea392822017-10-31 10:02:25 +01003724 return NULL;
3725}
3726
3727
Willy Tarreau62f52692017-10-08 23:01:42 +02003728/*******************************************/
3729/* functions below are used by the streams */
3730/*******************************************/
3731
3732/*
3733 * Attach a new stream to a connection
3734 * (Used for outgoing connections)
3735 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01003736static struct conn_stream *h2_attach(struct connection *conn, struct session *sess)
Willy Tarreau62f52692017-10-08 23:01:42 +02003737{
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003738 struct conn_stream *cs;
3739 struct h2s *h2s;
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003740 struct h2c *h2c = conn->ctx;
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003741
Willy Tarreau7838a792019-08-12 18:42:03 +02003742 TRACE_ENTER(H2_EV_H2S_NEW, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003743 cs = cs_new(conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003744 if (!cs) {
3745 TRACE_DEVEL("leaving on CS allocation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003746 return NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02003747 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01003748 h2s = h2c_bck_stream_new(h2c, cs, sess);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003749 if (!h2s) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003750 TRACE_DEVEL("leaving on stream creation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003751 cs_free(cs);
3752 return NULL;
3753 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003754 TRACE_LEAVE(H2_EV_H2S_NEW, conn, h2s);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003755 return cs;
Willy Tarreau62f52692017-10-08 23:01:42 +02003756}
3757
Willy Tarreaufafd3982018-11-18 21:29:20 +01003758/* Retrieves the first valid conn_stream from this connection, or returns NULL.
3759 * We have to scan because we may have some orphan streams. It might be
3760 * beneficial to scan backwards from the end to reduce the likeliness to find
3761 * orphans.
3762 */
3763static const struct conn_stream *h2_get_first_cs(const struct connection *conn)
3764{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003765 struct h2c *h2c = conn->ctx;
Willy Tarreaufafd3982018-11-18 21:29:20 +01003766 struct h2s *h2s;
3767 struct eb32_node *node;
3768
3769 node = eb32_first(&h2c->streams_by_id);
3770 while (node) {
3771 h2s = container_of(node, struct h2s, by_id);
3772 if (h2s->cs)
3773 return h2s->cs;
3774 node = eb32_next(node);
3775 }
3776 return NULL;
3777}
3778
Willy Tarreau62f52692017-10-08 23:01:42 +02003779/*
Olivier Houchard060ed432018-11-06 16:32:42 +01003780 * Destroy the mux and the associated connection, if it is no longer used
3781 */
Christopher Faulet73c12072019-04-08 11:23:22 +02003782static void h2_destroy(void *ctx)
Olivier Houchard060ed432018-11-06 16:32:42 +01003783{
Christopher Faulet73c12072019-04-08 11:23:22 +02003784 struct h2c *h2c = ctx;
Olivier Houchard060ed432018-11-06 16:32:42 +01003785
Willy Tarreau7838a792019-08-12 18:42:03 +02003786 TRACE_ENTER(H2_EV_H2C_END, h2c->conn);
Christopher Faulet39a96ee2019-04-08 10:52:21 +02003787 if (eb_is_empty(&h2c->streams_by_id) || !h2c->conn || h2c->conn->ctx != h2c)
Christopher Faulet73c12072019-04-08 11:23:22 +02003788 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003789 TRACE_LEAVE(H2_EV_H2C_END);
Olivier Houchard060ed432018-11-06 16:32:42 +01003790}
3791
3792/*
Willy Tarreau62f52692017-10-08 23:01:42 +02003793 * Detach the stream from the connection and possibly release the connection.
3794 */
3795static void h2_detach(struct conn_stream *cs)
3796{
Willy Tarreau60935142017-10-16 18:11:19 +02003797 struct h2s *h2s = cs->ctx;
3798 struct h2c *h2c;
Olivier Houchardf502aca2018-12-14 19:42:40 +01003799 struct session *sess;
Willy Tarreau60935142017-10-16 18:11:19 +02003800
Willy Tarreau7838a792019-08-12 18:42:03 +02003801 TRACE_ENTER(H2_EV_STRM_END, h2s ? h2s->h2c->conn : NULL, h2s);
3802
Willy Tarreau60935142017-10-16 18:11:19 +02003803 cs->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02003804 if (!h2s) {
3805 TRACE_LEAVE(H2_EV_STRM_END);
Willy Tarreau60935142017-10-16 18:11:19 +02003806 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02003807 }
Willy Tarreau60935142017-10-16 18:11:19 +02003808
Olivier Houchard998410a2019-04-15 19:23:37 +02003809 /* The stream is about to die, so no need to attempt to run its task */
Willy Tarreauc234ae32019-05-13 17:56:11 +02003810 if (LIST_ADDED(&h2s->sending_list) &&
Olivier Houchard998410a2019-04-15 19:23:37 +02003811 h2s->send_wait != &h2s->wait_event) {
Willy Tarreau86eded62019-06-14 14:47:49 +02003812 tasklet_remove_from_tasklet_list(h2s->send_wait->tasklet);
Olivier Houchard998410a2019-04-15 19:23:37 +02003813 LIST_DEL_INIT(&h2s->sending_list);
Olivier Houchardd9986ed2019-05-09 13:24:08 +02003814 /*
3815 * At this point, the stream_interface is supposed to have called
3816 * h2_unsubscribe(), so the only way there's still a
3817 * subscription that came from the stream_interface (as we
3818 * can subscribe ourself, in h2_do_shutw() and h2_do_shutr(),
3819 * without the stream_interface involved) is that we subscribed
3820 * for sending, we woke the tasklet up and removed the
3821 * SUB_RETRY_SEND flag, so the stream_interface would not
3822 * know it has to unsubscribe for send, but the tasklet hasn't
3823 * run yet. Make sure to handle that by explicitely setting
3824 * send_wait to NULL, as nothing else will do it for us.
3825 */
3826 h2s->send_wait = NULL;
Olivier Houchard998410a2019-04-15 19:23:37 +02003827 }
3828
Olivier Houchardf502aca2018-12-14 19:42:40 +01003829 sess = h2s->sess;
Willy Tarreau60935142017-10-16 18:11:19 +02003830 h2c = h2s->h2c;
3831 h2s->cs = NULL;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02003832 h2c->nb_cs--;
Willy Tarreaufa1d3572019-01-31 10:31:51 +01003833 if ((h2c->flags & (H2_CF_IS_BACK|H2_CF_DEM_TOOMANY)) == H2_CF_DEM_TOOMANY &&
3834 !h2_frt_has_too_many_cs(h2c)) {
3835 /* frontend connection was blocking new streams creation */
Willy Tarreauf2101912018-07-19 10:11:38 +02003836 h2c->flags &= ~H2_CF_DEM_TOOMANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003837 h2c_restart_reading(h2c, 1);
Willy Tarreauf2101912018-07-19 10:11:38 +02003838 }
Willy Tarreau60935142017-10-16 18:11:19 +02003839
Willy Tarreau22cf59b2017-11-10 11:42:33 +01003840 /* this stream may be blocked waiting for some data to leave (possibly
3841 * an ES or RST frame), so orphan it in this case.
3842 */
Willy Tarreau3041fcc2018-03-29 15:41:32 +02003843 if (!(cs->conn->flags & CO_FL_ERROR) &&
Willy Tarreaua2b51812018-07-27 09:55:14 +02003844 (h2c->st0 < H2_CS_ERROR) &&
Willy Tarreau7838a792019-08-12 18:42:03 +02003845 (h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL)) && (h2s->send_wait || h2s->recv_wait)) {
3846 TRACE_DEVEL("leaving on stream blocked", H2_EV_STRM_END|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau22cf59b2017-11-10 11:42:33 +01003847 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02003848 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01003849
Willy Tarreau45f752e2017-10-30 15:44:59 +01003850 if ((h2c->flags & H2_CF_DEM_BLOCK_ANY && h2s->id == h2c->dsi) ||
3851 (h2c->flags & H2_CF_MUX_BLOCK_ANY && h2s->id == h2c->msi)) {
3852 /* unblock the connection if it was blocked on this
3853 * stream.
3854 */
3855 h2c->flags &= ~H2_CF_DEM_BLOCK_ANY;
3856 h2c->flags &= ~H2_CF_MUX_BLOCK_ANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003857 h2c_restart_reading(h2c, 1);
Willy Tarreau45f752e2017-10-30 15:44:59 +01003858 }
3859
Willy Tarreau71049cc2018-03-28 13:56:39 +02003860 h2s_destroy(h2s);
Willy Tarreau60935142017-10-16 18:11:19 +02003861
Christopher Faulet9b79a102019-07-15 11:22:56 +02003862 if (h2c->flags & H2_CF_IS_BACK) {
Olivier Houchard8a786902018-12-15 16:05:40 +01003863 if (!(h2c->conn->flags &
3864 (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH))) {
3865 if (!h2c->conn->owner) {
Olivier Houchardf502aca2018-12-14 19:42:40 +01003866 h2c->conn->owner = sess;
Olivier Houchard351411f2018-12-27 17:20:54 +01003867 if (!session_add_conn(sess, h2c->conn, h2c->conn->target)) {
3868 h2c->conn->owner = NULL;
3869 if (eb_is_empty(&h2c->streams_by_id)) {
3870 if (!srv_add_to_idle_list(objt_server(h2c->conn->target), h2c->conn))
3871 /* The server doesn't want it, let's kill the connection right away */
3872 h2c->conn->mux->destroy(h2c->conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003873 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
Olivier Houchard351411f2018-12-27 17:20:54 +01003874 return;
3875 }
3876 }
Olivier Houchard8a786902018-12-15 16:05:40 +01003877 }
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003878 if (eb_is_empty(&h2c->streams_by_id)) {
Christopher Fauletb2d930e2019-09-26 16:15:10 +02003879 if (session_check_idle_conn(h2c->conn->owner, h2c->conn) != 0) {
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003880 /* At this point either the connection is destroyed, or it's been added to the server idle list, just stop */
Willy Tarreaufe1c9082019-08-30 14:57:17 +02003881 TRACE_DEVEL("leaving without reusable idle connection", H2_EV_STRM_END);
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003882 return;
Christopher Fauletb2d930e2019-09-26 16:15:10 +02003883 }
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003884 }
Olivier Houchard8a786902018-12-15 16:05:40 +01003885 /* Never ever allow to reuse a connection from a non-reuse backend */
3886 if ((h2c->proxy->options & PR_O_REUSE_MASK) == PR_O_REUSE_NEVR)
3887 h2c->conn->flags |= CO_FL_PRIVATE;
Willy Tarreauc234ae32019-05-13 17:56:11 +02003888 if (!LIST_ADDED(&h2c->conn->list) && h2c->nb_streams < h2c->streams_limit) {
Olivier Houchard8a786902018-12-15 16:05:40 +01003889 struct server *srv = objt_server(h2c->conn->target);
3890
3891 if (srv) {
3892 if (h2c->conn->flags & CO_FL_PRIVATE)
3893 LIST_ADD(&srv->priv_conns[tid], &h2c->conn->list);
3894 else
3895 LIST_ADD(&srv->idle_conns[tid], &h2c->conn->list);
3896 }
3897
3898 }
3899 }
3900 }
3901
Willy Tarreaue323f342018-03-28 13:51:45 +02003902 /* We don't want to close right now unless we're removing the
3903 * last stream, and either the connection is in error, or it
3904 * reached the ID already specified in a GOAWAY frame received
3905 * or sent (as seen by last_sid >= 0).
3906 */
Olivier Houchard7a977432019-03-21 15:47:13 +01003907 if (h2c_is_dead(h2c)) {
Willy Tarreaue323f342018-03-28 13:51:45 +02003908 /* no more stream will come, kill it now */
Willy Tarreau7838a792019-08-12 18:42:03 +02003909 TRACE_DEVEL("leaving and killing dead connection", H2_EV_STRM_END, h2c->conn);
Christopher Faulet73c12072019-04-08 11:23:22 +02003910 h2_release(h2c);
Willy Tarreaue323f342018-03-28 13:51:45 +02003911 }
3912 else if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02003913 if (h2c_may_expire(h2c))
3914 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
3915 else
3916 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02003917 task_queue(h2c->task);
Willy Tarreau7838a792019-08-12 18:42:03 +02003918 TRACE_DEVEL("leaving, refreshing connection's timeout", H2_EV_STRM_END, h2c->conn);
Willy Tarreau60935142017-10-16 18:11:19 +02003919 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003920 else
3921 TRACE_DEVEL("leaving", H2_EV_STRM_END, h2c->conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003922}
3923
Willy Tarreau88bdba32019-05-13 18:17:53 +02003924/* Performs a synchronous or asynchronous shutr(). */
3925static void h2_do_shutr(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02003926{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003927 struct h2c *h2c = h2s->h2c;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003928 struct wait_event *sw = &h2s->wait_event;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003929
Willy Tarreauf983d002019-05-14 10:40:21 +02003930 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02003931 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003932
Willy Tarreau7838a792019-08-12 18:42:03 +02003933 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
3934
Willy Tarreau18059042019-01-31 19:12:48 +01003935 /* a connstream may require us to immediately kill the whole connection
3936 * for example because of a "tcp-request content reject" rule that is
3937 * normally used to limit abuse. In this case we schedule a goaway to
3938 * close the connection.
Willy Tarreau926fa4c2017-11-07 14:42:12 +01003939 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02003940 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01003941 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003942 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01003943 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
3944 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
3945 }
Christopher Faulet35757d32019-03-07 15:51:33 +01003946 else if (!(h2s->flags & H2_SF_HEADERS_SENT)) {
3947 /* Nothing was never sent for this stream, so reset with
3948 * REFUSED_STREAM error to let the client retry the
3949 * request.
3950 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003951 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01003952 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
3953 }
Willy Tarreaucfba9d62019-08-06 10:30:58 +02003954 else {
3955 /* a final response was already provided, we don't want this
3956 * stream anymore. This may happen when the server responds
3957 * before the end of an upload and closes quickly (redirect,
3958 * deny, ...)
3959 */
3960 h2s_error(h2s, H2_ERR_CANCEL);
3961 }
Willy Tarreau18059042019-01-31 19:12:48 +01003962
Willy Tarreau90c32322017-11-24 08:00:30 +01003963 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003964 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02003965 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01003966
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003967 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003968 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau00dd0782018-03-01 16:31:34 +01003969 h2s_close(h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02003970 done:
3971 h2s->flags &= ~H2_SF_WANT_SHUTR;
Willy Tarreau7838a792019-08-12 18:42:03 +02003972 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02003973 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003974add_to_list:
Willy Tarreauc234ae32019-05-13 17:56:11 +02003975 if (!LIST_ADDED(&h2s->list)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003976 sw->events |= SUB_RETRY_SEND;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003977 if (h2s->flags & H2_SF_BLK_MFCTL) {
3978 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
3979 h2s->send_wait = sw;
3980 } else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM)) {
3981 h2s->send_wait = sw;
3982 LIST_ADDQ(&h2c->send_list, &h2s->list);
3983 }
Willy Tarreaub2e290a2018-03-30 17:35:38 +02003984 }
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003985 /* Let the handler know we want shutr */
Willy Tarreau2c249eb2019-05-13 18:06:17 +02003986 h2s->flags |= H2_SF_WANT_SHUTR;
Willy Tarreau7838a792019-08-12 18:42:03 +02003987 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02003988 return;
Willy Tarreau62f52692017-10-08 23:01:42 +02003989}
3990
Willy Tarreau88bdba32019-05-13 18:17:53 +02003991/* Performs a synchronous or asynchronous shutw(). */
3992static void h2_do_shutw(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02003993{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003994 struct h2c *h2c = h2s->h2c;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003995 struct wait_event *sw = &h2s->wait_event;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003996
Willy Tarreaucfba9d62019-08-06 10:30:58 +02003997 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02003998 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003999
Willy Tarreau7838a792019-08-12 18:42:03 +02004000 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4001
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004002 if (h2s->st != H2_SS_ERROR && (h2s->flags & H2_SF_HEADERS_SENT)) {
Willy Tarreau58e32082017-11-07 14:41:09 +01004003 /* we can cleanly close using an empty data frame only after headers */
4004
4005 if (!(h2s->flags & (H2_SF_ES_SENT|H2_SF_RST_SENT)) &&
4006 h2_send_empty_data_es(h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004007 goto add_to_list;
Willy Tarreau58e32082017-11-07 14:41:09 +01004008
4009 if (h2s->st == H2_SS_HREM)
Willy Tarreau00dd0782018-03-01 16:31:34 +01004010 h2s_close(h2s);
Willy Tarreau58e32082017-11-07 14:41:09 +01004011 else
4012 h2s->st = H2_SS_HLOC;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004013 } else {
Willy Tarreau18059042019-01-31 19:12:48 +01004014 /* a connstream may require us to immediately kill the whole connection
4015 * for example because of a "tcp-request content reject" rule that is
4016 * normally used to limit abuse. In this case we schedule a goaway to
4017 * close the connection.
Willy Tarreaua1349f02017-10-31 07:41:55 +01004018 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004019 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004020 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004021 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004022 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4023 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4024 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004025 else {
4026 /* Nothing was never sent for this stream, so reset with
4027 * REFUSED_STREAM error to let the client retry the
4028 * request.
4029 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004030 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004031 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4032 }
Willy Tarreau18059042019-01-31 19:12:48 +01004033
Willy Tarreau90c32322017-11-24 08:00:30 +01004034 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004035 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004036 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004037
Willy Tarreau00dd0782018-03-01 16:31:34 +01004038 h2s_close(h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004039 }
4040
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004041 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004042 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau7838a792019-08-12 18:42:03 +02004043
4044 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
4045
Willy Tarreau88bdba32019-05-13 18:17:53 +02004046 done:
4047 h2s->flags &= ~H2_SF_WANT_SHUTW;
4048 return;
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004049
4050 add_to_list:
Willy Tarreauc234ae32019-05-13 17:56:11 +02004051 if (!LIST_ADDED(&h2s->list)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004052 sw->events |= SUB_RETRY_SEND;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004053 if (h2s->flags & H2_SF_BLK_MFCTL) {
4054 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
4055 h2s->send_wait = sw;
4056 } else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM)) {
4057 h2s->send_wait = sw;
4058 LIST_ADDQ(&h2c->send_list, &h2s->list);
4059 }
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004060 }
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004061 /* let the handler know we want to shutw */
4062 h2s->flags |= H2_SF_WANT_SHUTW;
Willy Tarreau7838a792019-08-12 18:42:03 +02004063 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004064 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004065}
4066
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004067/* This is the tasklet referenced in h2s->wait_event.tasklet, it is used for
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004068 * deferred shutdowns when the h2_detach() was done but the mux buffer was full
4069 * and prevented the last frame from being emitted.
4070 */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004071static struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned short state)
4072{
4073 struct h2s *h2s = ctx;
Willy Tarreau88bdba32019-05-13 18:17:53 +02004074 struct h2c *h2c = h2s->h2c;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004075
Willy Tarreau7838a792019-08-12 18:42:03 +02004076 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4077
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004078 LIST_DEL_INIT(&h2s->sending_list);
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004079 if (h2s->flags & H2_SF_WANT_SHUTW)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004080 h2_do_shutw(h2s);
4081
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004082 if (h2s->flags & H2_SF_WANT_SHUTR)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004083 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004084
Willy Tarreau88bdba32019-05-13 18:17:53 +02004085 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004086 /* We're done trying to send, remove ourself from the send_list */
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004087 LIST_DEL_INIT(&h2s->list);
Olivier Houchard7a977432019-03-21 15:47:13 +01004088
Willy Tarreau88bdba32019-05-13 18:17:53 +02004089 if (!h2s->cs) {
4090 h2s_destroy(h2s);
4091 if (h2c_is_dead(h2c))
4092 h2_release(h2c);
4093 }
Olivier Houchard7a977432019-03-21 15:47:13 +01004094 }
4095
Willy Tarreau7838a792019-08-12 18:42:03 +02004096 TRACE_LEAVE(H2_EV_STRM_SHUT);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004097 return NULL;
Willy Tarreau62f52692017-10-08 23:01:42 +02004098}
4099
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004100/* shutr() called by the conn_stream (mux_ops.shutr) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004101static void h2_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
4102{
4103 struct h2s *h2s = cs->ctx;
4104
Willy Tarreau7838a792019-08-12 18:42:03 +02004105 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004106 if (cs->flags & CS_FL_KILL_CONN)
4107 h2s->flags |= H2_SF_KILL_CONN;
4108
Willy Tarreau7838a792019-08-12 18:42:03 +02004109 if (mode)
4110 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004111
Willy Tarreau7838a792019-08-12 18:42:03 +02004112 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004113}
4114
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004115/* shutw() called by the conn_stream (mux_ops.shutw) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004116static void h2_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
4117{
4118 struct h2s *h2s = cs->ctx;
4119
Willy Tarreau7838a792019-08-12 18:42:03 +02004120 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004121 if (cs->flags & CS_FL_KILL_CONN)
4122 h2s->flags |= H2_SF_KILL_CONN;
4123
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004124 h2_do_shutw(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02004125 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004126}
4127
Christopher Faulet9b79a102019-07-15 11:22:56 +02004128/* Decode the payload of a HEADERS frame and produce the HTX request or response
4129 * depending on the connection's side. Returns a positive value on success, a
4130 * negative value on failure, or 0 if it couldn't proceed. May report connection
4131 * errors in h2c->errcode if the frame is non-decodable and the connection
4132 * unrecoverable. In absence of connection error when a failure is reported, the
4133 * caller must assume a stream error.
Willy Tarreauea18f862018-12-22 20:19:26 +01004134 *
4135 * The function may fold CONTINUATION frames into the initial HEADERS frame
4136 * by removing padding and next frame header, then moving the CONTINUATION
4137 * frame's payload and adjusting h2c->dfl to match the new aggregated frame,
4138 * leaving a hole between the main frame and the beginning of the next one.
4139 * The possibly remaining incomplete or next frame at the end may be moved
4140 * if the aggregated frame is not deleted, in order to fill the hole. Wrapped
4141 * HEADERS frames are unwrapped into a temporary buffer before decoding.
4142 *
4143 * A buffer at the beginning of processing may look like this :
4144 *
4145 * ,---.---------.-----.--------------.--------------.------.---.
4146 * |///| HEADERS | PAD | CONTINUATION | CONTINUATION | DATA |///|
4147 * `---^---------^-----^--------------^--------------^------^---'
4148 * | | <-----> | |
4149 * area | dpl | wrap
4150 * |<--------------> |
4151 * | dfl |
4152 * |<-------------------------------------------------->|
4153 * head data
4154 *
4155 * Padding is automatically overwritten when folding, participating to the
4156 * hole size after dfl :
4157 *
4158 * ,---.------------------------.-----.--------------.------.---.
4159 * |///| HEADERS : CONTINUATION |/////| CONTINUATION | DATA |///|
4160 * `---^------------------------^-----^--------------^------^---'
4161 * | | <-----> | |
4162 * area | hole | wrap
4163 * |<-----------------------> |
4164 * | dfl |
4165 * |<-------------------------------------------------->|
4166 * head data
4167 *
4168 * Please note that the HEADERS frame is always deprived from its PADLEN byte
4169 * however it may start with the 5 stream-dep+weight bytes in case of PRIORITY
4170 * bit.
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004171 *
4172 * The <flags> field must point to either the stream's flags or to a copy of it
4173 * so that the function can update the following flags :
4174 * - H2_SF_DATA_CLEN when content-length is seen
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004175 * - H2_SF_HEADERS_RCVD once the frame is successfully decoded
Willy Tarreau88d138e2019-01-02 19:38:14 +01004176 *
4177 * The H2_SF_HEADERS_RCVD flag is also looked at in the <flags> field prior to
4178 * decoding, in order to detect if we're dealing with a headers or a trailers
4179 * block (the trailers block appears after H2_SF_HEADERS_RCVD was seen).
Willy Tarreau13278b42017-10-13 19:23:14 +02004180 */
Willy Tarreau4790f7c2019-01-24 11:33:02 +01004181static int h2c_decode_headers(struct h2c *h2c, struct buffer *rxbuf, uint32_t *flags, unsigned long long *body_len)
Willy Tarreau13278b42017-10-13 19:23:14 +02004182{
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004183 const uint8_t *hdrs = (uint8_t *)b_head(&h2c->dbuf);
Willy Tarreau83061a82018-07-13 11:56:34 +02004184 struct buffer *tmp = get_trash_chunk();
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004185 struct http_hdr list[global.tune.max_http_hdr * 2];
Willy Tarreau83061a82018-07-13 11:56:34 +02004186 struct buffer *copy = NULL;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004187 unsigned int msgf;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004188 struct htx *htx = NULL;
Willy Tarreauea18f862018-12-22 20:19:26 +01004189 int flen; // header frame len
4190 int hole = 0;
Willy Tarreau86277d42019-01-02 15:36:11 +01004191 int ret = 0;
4192 int outlen;
Willy Tarreau13278b42017-10-13 19:23:14 +02004193 int wrap;
Willy Tarreau13278b42017-10-13 19:23:14 +02004194
Willy Tarreau7838a792019-08-12 18:42:03 +02004195 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
4196
Willy Tarreauea18f862018-12-22 20:19:26 +01004197next_frame:
4198 if (b_data(&h2c->dbuf) - hole < h2c->dfl)
4199 goto leave; // incomplete input frame
4200
4201 /* No END_HEADERS means there's one or more CONTINUATION frames. In
4202 * this case, we'll try to paste it immediately after the initial
4203 * HEADERS frame payload and kill any possible padding. The initial
4204 * frame's length will be increased to represent the concatenation
4205 * of the two frames. The next frame is read from position <tlen>
4206 * and written at position <flen> (minus padding if some is present).
4207 */
4208 if (unlikely(!(h2c->dff & H2_F_HEADERS_END_HEADERS))) {
4209 struct h2_fh hdr;
4210 int clen; // CONTINUATION frame's payload length
4211
Willy Tarreau7838a792019-08-12 18:42:03 +02004212 TRACE_STATE("EH missing, expecting continuation frame", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_HDR, h2c->conn);
Willy Tarreauea18f862018-12-22 20:19:26 +01004213 if (!h2_peek_frame_hdr(&h2c->dbuf, h2c->dfl + hole, &hdr)) {
4214 /* no more data, the buffer may be full, either due to
4215 * too large a frame or because of too large a hole that
4216 * we're going to compact at the end.
4217 */
4218 goto leave;
4219 }
4220
4221 if (hdr.ft != H2_FT_CONTINUATION) {
4222 /* RFC7540#6.10: frame of unexpected type */
Willy Tarreau7838a792019-08-12 18:42:03 +02004223 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 Tarreauea18f862018-12-22 20:19:26 +01004224 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
4225 goto fail;
4226 }
4227
4228 if (hdr.sid != h2c->dsi) {
4229 /* RFC7540#6.10: frame of different stream */
Willy Tarreau7838a792019-08-12 18:42:03 +02004230 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 Tarreauea18f862018-12-22 20:19:26 +01004231 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
4232 goto fail;
4233 }
4234
4235 if ((unsigned)hdr.len > (unsigned)global.tune.bufsize) {
4236 /* RFC7540#4.2: invalid frame length */
Willy Tarreau7838a792019-08-12 18:42:03 +02004237 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 Tarreauea18f862018-12-22 20:19:26 +01004238 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4239 goto fail;
4240 }
4241
4242 /* detect when we must stop aggragating frames */
4243 h2c->dff |= hdr.ff & H2_F_HEADERS_END_HEADERS;
4244
4245 /* Take as much as we can of the CONTINUATION frame's payload */
4246 clen = b_data(&h2c->dbuf) - (h2c->dfl + hole + 9);
4247 if (clen > hdr.len)
4248 clen = hdr.len;
4249
4250 /* Move the frame's payload over the padding, hole and frame
4251 * header. At least one of hole or dpl is null (see diagrams
4252 * above). The hole moves after the new aggragated frame.
4253 */
4254 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole + 9), clen, -(h2c->dpl + hole + 9));
4255 h2c->dfl += clen - h2c->dpl;
4256 hole += h2c->dpl + 9;
4257 h2c->dpl = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004258 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 Tarreauea18f862018-12-22 20:19:26 +01004259 goto next_frame;
4260 }
4261
4262 flen = h2c->dfl - h2c->dpl;
Willy Tarreau68472622017-12-11 18:36:37 +01004263
Willy Tarreau13278b42017-10-13 19:23:14 +02004264 /* if the input buffer wraps, take a temporary copy of it (rare) */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004265 wrap = b_wrap(&h2c->dbuf) - b_head(&h2c->dbuf);
Willy Tarreau13278b42017-10-13 19:23:14 +02004266 if (wrap < h2c->dfl) {
Willy Tarreau68dd9852017-07-03 14:44:26 +02004267 copy = alloc_trash_chunk();
4268 if (!copy) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004269 TRACE_DEVEL("failed to allocate temporary buffer", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_ERR, h2c->conn);
Willy Tarreau68dd9852017-07-03 14:44:26 +02004270 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
4271 goto fail;
4272 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004273 memcpy(copy->area, b_head(&h2c->dbuf), wrap);
4274 memcpy(copy->area + wrap, b_orig(&h2c->dbuf), h2c->dfl - wrap);
4275 hdrs = (uint8_t *) copy->area;
Willy Tarreau13278b42017-10-13 19:23:14 +02004276 }
4277
Willy Tarreau13278b42017-10-13 19:23:14 +02004278 /* Skip StreamDep and weight for now (we don't support PRIORITY) */
4279 if (h2c->dff & H2_F_HEADERS_PRIORITY) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004280 if (read_n32(hdrs) == h2c->dsi) {
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004281 /* RFC7540#5.3.1 : stream dep may not depend on itself */
Willy Tarreau7838a792019-08-12 18:42:03 +02004282 TRACE_STATE("invalid stream dependency!", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004283 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreaua0d11b62018-09-05 18:30:05 +02004284 goto fail;
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004285 }
4286
Willy Tarreaua01f45e2018-12-31 07:41:24 +01004287 if (flen < 5) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004288 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 Tarreaua01f45e2018-12-31 07:41:24 +01004289 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4290 goto fail;
4291 }
4292
Willy Tarreau13278b42017-10-13 19:23:14 +02004293 hdrs += 5; // stream dep = 4, weight = 1
4294 flen -= 5;
4295 }
4296
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004297 if (!h2_get_buf(h2c, rxbuf)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004298 TRACE_STATE("waiting for h2c rxbuf allocation", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_BLK, h2c->conn);
Willy Tarreau937f7602018-02-26 15:22:17 +01004299 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau86277d42019-01-02 15:36:11 +01004300 goto leave;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004301 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004302
Willy Tarreau937f7602018-02-26 15:22:17 +01004303 /* we can't retry a failed decompression operation so we must be very
4304 * careful not to take any risks. In practice the output buffer is
4305 * always empty except maybe for trailers, in which case we simply have
4306 * to wait for the upper layer to finish consuming what is available.
4307 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004308 htx = htx_from_buf(rxbuf);
4309 if (!htx_is_empty(htx)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004310 TRACE_STATE("waiting for room in h2c rxbuf", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_BLK, h2c->conn);
Christopher Faulet9b79a102019-07-15 11:22:56 +02004311 h2c->flags |= H2_CF_DEM_SFULL;
4312 goto leave;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004313 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004314
Willy Tarreau25919232019-01-03 14:48:18 +01004315 /* past this point we cannot roll back in case of error */
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004316 outlen = hpack_decode_frame(h2c->ddht, hdrs, flen, list,
4317 sizeof(list)/sizeof(list[0]), tmp);
4318 if (outlen < 0) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004319 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 Tarreau59a10fb2017-11-21 20:03:02 +01004320 h2c_error(h2c, H2_ERR_COMPRESSION_ERROR);
4321 goto fail;
4322 }
4323
Willy Tarreau25919232019-01-03 14:48:18 +01004324 /* The PACK decompressor was updated, let's update the input buffer and
4325 * the parser's state to commit these changes and allow us to later
4326 * fail solely on the stream if needed.
4327 */
4328 b_del(&h2c->dbuf, h2c->dfl + hole);
4329 h2c->dfl = hole = 0;
4330 h2c->st0 = H2_CS_FRAME_H;
4331
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004332 /* OK now we have our header list in <list> */
Willy Tarreau880f5802019-01-03 08:10:14 +01004333 msgf = (h2c->dff & H2_F_HEADERS_END_STREAM) ? 0 : H2_MSGF_BODY;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004334
Willy Tarreau88d138e2019-01-02 19:38:14 +01004335 if (*flags & H2_SF_HEADERS_RCVD)
4336 goto trailers;
4337
4338 /* This is the first HEADERS frame so it's a headers block */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004339 if (h2c->flags & H2_CF_IS_BACK)
4340 outlen = h2_make_htx_response(list, htx, &msgf, body_len);
4341 else
4342 outlen = h2_make_htx_request(list, htx, &msgf, body_len);
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004343
4344 if (outlen < 0) {
Willy Tarreau25919232019-01-03 14:48:18 +01004345 /* too large headers? this is a stream error only */
Willy Tarreau7838a792019-08-12 18:42:03 +02004346 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 Tarreau59a10fb2017-11-21 20:03:02 +01004347 goto fail;
4348 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004349
Willy Tarreau174b06a2018-04-25 18:13:58 +02004350 if (msgf & H2_MSGF_BODY) {
4351 /* a payload is present */
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004352 if (msgf & H2_MSGF_BODY_CL) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004353 *flags |= H2_SF_DATA_CLEN;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004354 htx->extra = *body_len;
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004355 }
Willy Tarreau174b06a2018-04-25 18:13:58 +02004356 }
4357
Willy Tarreau88d138e2019-01-02 19:38:14 +01004358 done:
Christopher Faulet0b465482019-02-19 15:14:23 +01004359 /* indicate that a HEADERS frame was received for this stream, except
4360 * for 1xx responses. For 1xx responses, another HEADERS frame is
4361 * expected.
4362 */
4363 if (!(msgf & H2_MSGF_RSP_1XX))
4364 *flags |= H2_SF_HEADERS_RCVD;
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004365
Christopher Fauletb75b5ea2019-05-17 08:37:28 +02004366 if ((h2c->dff & H2_F_HEADERS_END_STREAM)) {
Christopher Faulet9b79a102019-07-15 11:22:56 +02004367 /* Mark the end of message using EOM */
Willy Tarreau7838a792019-08-12 18:42:03 +02004368 if (!htx_add_endof(htx, HTX_BLK_EOM)) {
4369 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 Faulet9b79a102019-07-15 11:22:56 +02004370 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004371 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01004372 }
Willy Tarreau937f7602018-02-26 15:22:17 +01004373
Willy Tarreau86277d42019-01-02 15:36:11 +01004374 /* success */
4375 ret = 1;
4376
Willy Tarreau68dd9852017-07-03 14:44:26 +02004377 leave:
Willy Tarreau86277d42019-01-02 15:36:11 +01004378 /* If there is a hole left and it's not at the end, we are forced to
Willy Tarreauea18f862018-12-22 20:19:26 +01004379 * move the remaining data over it.
4380 */
4381 if (hole) {
4382 if (b_data(&h2c->dbuf) > h2c->dfl + hole)
4383 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole),
4384 b_data(&h2c->dbuf) - (h2c->dfl + hole), -hole);
4385 b_sub(&h2c->dbuf, hole);
4386 }
4387
Willy Tarreau97215ca2019-04-29 10:20:21 +02004388 if (b_full(&h2c->dbuf) && h2c->dfl >= b_data(&h2c->dbuf)) {
Willy Tarreauea18f862018-12-22 20:19:26 +01004389 /* too large frames */
4390 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau86277d42019-01-02 15:36:11 +01004391 ret = -1;
Willy Tarreauea18f862018-12-22 20:19:26 +01004392 }
4393
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004394 if (htx)
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004395 htx_to_buf(htx, rxbuf);
Willy Tarreau68dd9852017-07-03 14:44:26 +02004396 free_trash_chunk(copy);
Willy Tarreau7838a792019-08-12 18:42:03 +02004397 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau86277d42019-01-02 15:36:11 +01004398 return ret;
4399
Willy Tarreau68dd9852017-07-03 14:44:26 +02004400 fail:
Willy Tarreau86277d42019-01-02 15:36:11 +01004401 ret = -1;
Willy Tarreau68dd9852017-07-03 14:44:26 +02004402 goto leave;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004403
4404 trailers:
4405 /* This is the last HEADERS frame hence a trailer */
Willy Tarreau88d138e2019-01-02 19:38:14 +01004406 if (!(h2c->dff & H2_F_HEADERS_END_STREAM)) {
4407 /* It's a trailer but it's missing ES flag */
Willy Tarreau7838a792019-08-12 18:42:03 +02004408 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 Tarreau88d138e2019-01-02 19:38:14 +01004409 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
4410 goto fail;
4411 }
4412
Christopher Faulet9b79a102019-07-15 11:22:56 +02004413 /* Trailers terminate a DATA sequence */
Willy Tarreau7838a792019-08-12 18:42:03 +02004414 if (h2_make_htx_trailers(list, htx) <= 0) {
4415 TRACE_STATE("failed to append HTX trailers into rxbuf", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2S_ERR, h2c->conn);
Christopher Faulet9b79a102019-07-15 11:22:56 +02004416 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004417 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01004418 goto done;
Willy Tarreau13278b42017-10-13 19:23:14 +02004419}
4420
Christopher Faulet9b79a102019-07-15 11:22:56 +02004421/* Transfer the payload of a DATA frame to the HTTP/1 side. The HTTP/2 frame
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004422 * parser state is automatically updated. Returns > 0 if it could completely
4423 * send the current frame, 0 if it couldn't complete, in which case
4424 * CS_FL_RCV_MORE must be checked to know if some data remain pending (an empty
4425 * DATA frame can return 0 as a valid result). Stream errors are reported in
4426 * h2s->errcode and connection errors in h2c->errcode. The caller must already
4427 * have checked the frame header and ensured that the frame was complete or the
4428 * buffer full. It changes the frame state to FRAME_A once done.
Willy Tarreau454f9052017-10-26 19:40:35 +02004429 */
Willy Tarreau454b57b2018-02-26 15:50:05 +01004430static int h2_frt_transfer_data(struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02004431{
4432 struct h2c *h2c = h2s->h2c;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004433 int block;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004434 unsigned int flen = 0;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004435 struct htx *htx = NULL;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004436 struct buffer *csbuf;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004437 unsigned int sent;
Willy Tarreau454f9052017-10-26 19:40:35 +02004438
Willy Tarreau7838a792019-08-12 18:42:03 +02004439 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
4440
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004441 h2c->flags &= ~H2_CF_DEM_SFULL;
Willy Tarreau454f9052017-10-26 19:40:35 +02004442
Olivier Houchard638b7992018-08-16 15:41:52 +02004443 csbuf = h2_get_buf(h2c, &h2s->rxbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004444 if (!csbuf) {
4445 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02004446 TRACE_STATE("waiting for an h2s rxbuf", H2_EV_RX_FRAME|H2_EV_RX_DATA|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau454b57b2018-02-26 15:50:05 +01004447 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004448 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004449 htx = htx_from_buf(csbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004450
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004451try_again:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004452 flen = h2c->dfl - h2c->dpl;
4453 if (!flen)
Willy Tarreau4a28da12018-01-04 14:41:00 +01004454 goto end_transfer;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004455
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004456 if (flen > b_data(&h2c->dbuf)) {
4457 flen = b_data(&h2c->dbuf);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004458 if (!flen)
Willy Tarreau454b57b2018-02-26 15:50:05 +01004459 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004460 }
4461
Christopher Faulet9b79a102019-07-15 11:22:56 +02004462 block = htx_free_data_space(htx);
4463 if (!block) {
4464 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004465 TRACE_STATE("h2s rxbuf is full", H2_EV_RX_FRAME|H2_EV_RX_DATA|H2_EV_H2S_BLK, h2c->conn, h2s);
Christopher Faulet9b79a102019-07-15 11:22:56 +02004466 goto fail;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004467 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004468 if (flen > block)
4469 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004470
Christopher Faulet9b79a102019-07-15 11:22:56 +02004471 /* here, flen is the max we can copy into the output buffer */
4472 block = b_contig_data(&h2c->dbuf, 0);
4473 if (flen > block)
4474 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004475
Christopher Faulet9b79a102019-07-15 11:22:56 +02004476 sent = htx_add_data(htx, ist2(b_head(&h2c->dbuf), flen));
Willy Tarreau7838a792019-08-12 18:42:03 +02004477 TRACE_DATA("move some data to h2s rxbuf", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s,, (void *)(long)sent);
Willy Tarreau454f9052017-10-26 19:40:35 +02004478
Christopher Faulet9b79a102019-07-15 11:22:56 +02004479 b_del(&h2c->dbuf, sent);
4480 h2c->dfl -= sent;
4481 h2c->rcvd_c += sent;
4482 h2c->rcvd_s += sent; // warning, this can also affect the closed streams!
Willy Tarreau454f9052017-10-26 19:40:35 +02004483
Christopher Faulet9b79a102019-07-15 11:22:56 +02004484 if (h2s->flags & H2_SF_DATA_CLEN) {
4485 h2s->body_len -= sent;
4486 htx->extra = h2s->body_len;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004487 }
4488
Christopher Faulet9b79a102019-07-15 11:22:56 +02004489 if (sent < flen) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01004490 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004491 TRACE_STATE("h2s rxbuf is full", H2_EV_RX_FRAME|H2_EV_RX_DATA|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau454b57b2018-02-26 15:50:05 +01004492 goto fail;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004493 }
4494
Christopher Faulet9b79a102019-07-15 11:22:56 +02004495 goto try_again;
4496
Willy Tarreau4a28da12018-01-04 14:41:00 +01004497 end_transfer:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004498 /* here we're done with the frame, all the payload (except padding) was
4499 * transferred.
4500 */
Willy Tarreaueba10f22018-04-25 20:44:22 +02004501
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004502 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Faulet9b79a102019-07-15 11:22:56 +02004503 if (!htx_add_endof(htx, HTX_BLK_EOM)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004504 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 Faulet9b79a102019-07-15 11:22:56 +02004505 h2c->flags |= H2_CF_DEM_SFULL;
4506 goto fail;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004507 }
Willy Tarreaueba10f22018-04-25 20:44:22 +02004508 }
4509
Willy Tarreaud1023bb2018-03-22 16:53:12 +01004510 h2c->rcvd_c += h2c->dpl;
4511 h2c->rcvd_s += h2c->dpl;
4512 h2c->dpl = 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02004513 h2c->st0 = H2_CS_FRAME_A; // send the corresponding window update
Christopher Faulet9b79a102019-07-15 11:22:56 +02004514 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02004515 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004516 return 1;
Willy Tarreau454b57b2018-02-26 15:50:05 +01004517 fail:
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004518 if (htx)
4519 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02004520 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454b57b2018-02-26 15:50:05 +01004521 return 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02004522}
4523
Willy Tarreau115e83b2018-12-01 19:17:53 +01004524/* Try to send a HEADERS frame matching HTX response present in HTX message
4525 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
4526 * must check the stream's status to detect any error which might have happened
4527 * subsequently to a successful send. The htx blocks are automatically removed
4528 * from the message. The htx message is assumed to be valid since produced from
4529 * the internal code, hence it contains a start line, an optional series of
4530 * header blocks and an end of header, otherwise an invalid frame could be
4531 * emitted and the resulting htx message could be left in an inconsistent state.
4532 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004533static size_t h2s_frt_make_resp_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau115e83b2018-12-01 19:17:53 +01004534{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004535 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau115e83b2018-12-01 19:17:53 +01004536 struct h2c *h2c = h2s->h2c;
4537 struct htx_blk *blk;
4538 struct htx_blk *blk_end;
4539 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02004540 struct buffer *mbuf;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004541 struct htx_sl *sl;
4542 enum htx_blk_type type;
4543 int es_now = 0;
4544 int ret = 0;
4545 int hdr;
4546 int idx;
4547
Willy Tarreau7838a792019-08-12 18:42:03 +02004548 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
4549
Willy Tarreau115e83b2018-12-01 19:17:53 +01004550 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004551 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004552 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02004553 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004554 return 0;
4555 }
4556
Willy Tarreau115e83b2018-12-01 19:17:53 +01004557 /* determine the first block which must not be deleted, blk_end may
4558 * be NULL if all blocks have to be deleted.
4559 */
4560 idx = htx_get_head(htx);
4561 blk_end = NULL;
4562 while (idx != -1) {
4563 type = htx_get_blk_type(htx_get_blk(htx, idx));
4564 idx = htx_get_next(htx, idx);
4565 if (type == HTX_BLK_EOH) {
4566 if (idx != -1)
4567 blk_end = htx_get_blk(htx, idx);
4568 break;
4569 }
4570 }
4571
4572 /* get the start line, we do have one */
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004573 blk = htx_get_head_blk(htx);
4574 BUG_ON(htx_get_blk_type(blk) != HTX_BLK_RES_SL);
4575 ALREADY_CHECKED(blk);
4576 sl = htx_get_blk_ptr(htx, blk);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004577 h2s->status = sl->info.res.status;
Willy Tarreau7838a792019-08-12 18:42:03 +02004578 if (h2s->status < 100 || h2s->status > 999) {
4579 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 Tarreauaafdf582018-12-10 18:06:40 +01004580 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004581 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01004582
4583 /* and the rest of the headers, that we dump starting at header 0 */
4584 hdr = 0;
4585
Willy Tarreau8e162ee2018-12-06 14:07:27 +01004586 idx = htx_get_head(htx); // returns the SL that we skip
Willy Tarreau115e83b2018-12-01 19:17:53 +01004587 while ((idx = htx_get_next(htx, idx)) != -1) {
4588 blk = htx_get_blk(htx, idx);
4589 type = htx_get_blk_type(blk);
4590
4591 if (type == HTX_BLK_UNUSED)
4592 continue;
4593
4594 if (type != HTX_BLK_HDR)
4595 break;
4596
Willy Tarreau7838a792019-08-12 18:42:03 +02004597 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
4598 TRACE_PROTO("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004599 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004600 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01004601
4602 list[hdr].n = htx_get_blk_name(htx, blk);
4603 list[hdr].v = htx_get_blk_value(htx, blk);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004604 hdr++;
4605 }
4606
4607 /* marker for end of headers */
4608 list[hdr].n = ist("");
4609
4610 if (h2s->status == 204 || h2s->status == 304) {
4611 /* no contents, claim c-len is present and set to zero */
4612 es_now = 1;
4613 }
4614
Willy Tarreau9c218e72019-05-26 10:08:28 +02004615 mbuf = br_tail(h2c->mbuf);
4616 retry:
4617 if (!h2_get_buf(h2c, mbuf)) {
4618 h2c->flags |= H2_CF_MUX_MALLOC;
4619 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02004620 TRACE_STATE("waiting for room in output buffer", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau9c218e72019-05-26 10:08:28 +02004621 return 0;
4622 }
4623
Willy Tarreau115e83b2018-12-01 19:17:53 +01004624 chunk_reset(&outbuf);
4625
4626 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004627 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
4628 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004629 break;
4630 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02004631 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau115e83b2018-12-01 19:17:53 +01004632 }
4633
4634 if (outbuf.size < 9)
4635 goto full;
4636
4637 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
4638 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
4639 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4640 outbuf.data = 9;
4641
4642 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01004643 if (!hpack_encode_int_status(&outbuf, h2s->status)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004644 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004645 goto realign_again;
4646 goto full;
4647 }
4648
4649 /* encode all headers, stop at empty name */
4650 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
4651 /* these ones do not exist in H2 and must be dropped. */
4652 if (isteq(list[hdr].n, ist("connection")) ||
4653 isteq(list[hdr].n, ist("proxy-connection")) ||
4654 isteq(list[hdr].n, ist("keep-alive")) ||
4655 isteq(list[hdr].n, ist("upgrade")) ||
4656 isteq(list[hdr].n, ist("transfer-encoding")))
4657 continue;
4658
Christopher Faulet86d144c2019-08-14 16:32:25 +02004659 /* Skip all pseudo-headers */
4660 if (*(list[hdr].n.ptr) == ':')
4661 continue;
4662
Willy Tarreau115e83b2018-12-01 19:17:53 +01004663 if (isteq(list[hdr].n, ist("")))
4664 break; // end
4665
4666 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
4667 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004668 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004669 goto realign_again;
4670 goto full;
4671 }
4672 }
4673
Willy Tarreaucb985a42019-10-07 16:56:34 +02004674 /* update the frame's size */
4675 h2_set_frame_size(outbuf.area, outbuf.data - 9);
4676
4677 if (outbuf.data > h2c->mfs + 9) {
4678 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
4679 /* output full */
4680 if (b_space_wraps(mbuf))
4681 goto realign_again;
4682 goto full;
4683 }
4684 }
4685
Christopher Faulet0b465482019-02-19 15:14:23 +01004686 /* we may need to add END_STREAM except for 1xx responses.
Willy Tarreau115e83b2018-12-01 19:17:53 +01004687 * FIXME: we should also set it when we know for sure that the
4688 * content-length is zero as well as on 204/304
4689 */
Christopher Faulet0b465482019-02-19 15:14:23 +01004690 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM &&
4691 (h2s->status >= 200 || h2s->status == 101))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004692 es_now = 1;
4693
Willy Tarreau927b88b2019-03-04 08:03:25 +01004694 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW)
Willy Tarreau115e83b2018-12-01 19:17:53 +01004695 es_now = 1;
4696
Willy Tarreau115e83b2018-12-01 19:17:53 +01004697 if (es_now)
4698 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
4699
4700 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02004701 TRACE_USER("sent H2 response", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
Willy Tarreaubcc45952019-05-26 10:05:50 +02004702 b_add(mbuf, outbuf.data);
Christopher Faulet0b465482019-02-19 15:14:23 +01004703
4704 /* indicates the HEADERS frame was sent, except for 1xx responses. For
4705 * 1xx responses, another HEADERS frame is expected.
4706 */
4707 if (h2s->status >= 200 || h2s->status == 101)
4708 h2s->flags |= H2_SF_HEADERS_SENT;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004709
Willy Tarreau115e83b2018-12-01 19:17:53 +01004710 if (es_now) {
4711 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02004712 TRACE_PROTO("setting ES on HEADERS frame", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004713 if (h2s->st == H2_SS_OPEN)
4714 h2s->st = H2_SS_HLOC;
4715 else
4716 h2s_close(h2s);
4717 }
4718
4719 /* OK we could properly deliver the response */
4720
4721 /* remove all header blocks including the EOH and compute the
4722 * corresponding size.
4723 *
4724 * FIXME: We should remove everything when es_now is set.
4725 */
4726 ret = 0;
4727 idx = htx_get_head(htx);
4728 blk = htx_get_blk(htx, idx);
4729 while (blk != blk_end) {
4730 ret += htx_get_blksz(blk);
4731 blk = htx_remove_blk(htx, blk);
4732 }
Willy Tarreauc5753ae2018-12-02 12:28:01 +01004733
Christopher Faulet316934d2019-05-15 14:22:48 +02004734 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
4735 ret += htx_get_blksz(blk_end);
Willy Tarreauc5753ae2018-12-02 12:28:01 +01004736 htx_remove_blk(htx, blk_end);
Christopher Faulet316934d2019-05-15 14:22:48 +02004737 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01004738 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02004739 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004740 return ret;
4741 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02004742 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
4743 goto retry;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004744 h2c->flags |= H2_CF_MUX_MFULL;
4745 h2s->flags |= H2_SF_BLK_MROOM;
4746 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004747 TRACE_STATE("mux buffer full", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004748 goto end;
4749 fail:
4750 /* unparsable HTX messages, too large ones to be produced in the local
4751 * list etc go here (unrecoverable errors).
4752 */
4753 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
4754 ret = 0;
4755 goto end;
4756}
4757
Willy Tarreau80739692018-10-05 11:35:57 +02004758/* Try to send a HEADERS frame matching HTX request present in HTX message
4759 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
4760 * must check the stream's status to detect any error which might have happened
4761 * subsequently to a successful send. The htx blocks are automatically removed
4762 * from the message. The htx message is assumed to be valid since produced from
4763 * the internal code, hence it contains a start line, an optional series of
4764 * header blocks and an end of header, otherwise an invalid frame could be
4765 * emitted and the resulting htx message could be left in an inconsistent state.
4766 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004767static size_t h2s_bck_make_req_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau80739692018-10-05 11:35:57 +02004768{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004769 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau80739692018-10-05 11:35:57 +02004770 struct h2c *h2c = h2s->h2c;
4771 struct htx_blk *blk;
4772 struct htx_blk *blk_end;
4773 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02004774 struct buffer *mbuf;
Willy Tarreau80739692018-10-05 11:35:57 +02004775 struct htx_sl *sl;
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004776 struct ist meth, uri, auth;
Willy Tarreau80739692018-10-05 11:35:57 +02004777 enum htx_blk_type type;
4778 int es_now = 0;
4779 int ret = 0;
4780 int hdr;
4781 int idx;
4782
Willy Tarreau7838a792019-08-12 18:42:03 +02004783 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
4784
Willy Tarreau80739692018-10-05 11:35:57 +02004785 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004786 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02004787 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02004788 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02004789 return 0;
4790 }
4791
Willy Tarreau80739692018-10-05 11:35:57 +02004792 /* determine the first block which must not be deleted, blk_end may
4793 * be NULL if all blocks have to be deleted.
4794 */
4795 idx = htx_get_head(htx);
4796 blk_end = NULL;
4797 while (idx != -1) {
4798 type = htx_get_blk_type(htx_get_blk(htx, idx));
4799 idx = htx_get_next(htx, idx);
4800 if (type == HTX_BLK_EOH) {
4801 if (idx != -1)
4802 blk_end = htx_get_blk(htx, idx);
4803 break;
4804 }
4805 }
4806
4807 /* get the start line, we do have one */
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004808 blk = htx_get_head_blk(htx);
4809 BUG_ON(htx_get_blk_type(blk) != HTX_BLK_REQ_SL);
4810 ALREADY_CHECKED(blk);
4811 sl = htx_get_blk_ptr(htx, blk);
Willy Tarreau80739692018-10-05 11:35:57 +02004812 meth = htx_sl_req_meth(sl);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004813 uri = htx_sl_req_uri(sl);
4814 if (unlikely(uri.len == 0)) {
4815 TRACE_PROTO("no URI in HTX request", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
4816 goto fail;
4817 }
Willy Tarreau80739692018-10-05 11:35:57 +02004818
4819 /* and the rest of the headers, that we dump starting at header 0 */
4820 hdr = 0;
4821
Willy Tarreau8e162ee2018-12-06 14:07:27 +01004822 idx = htx_get_head(htx); // returns the SL that we skip
Willy Tarreau80739692018-10-05 11:35:57 +02004823 while ((idx = htx_get_next(htx, idx)) != -1) {
4824 blk = htx_get_blk(htx, idx);
4825 type = htx_get_blk_type(blk);
4826
4827 if (type == HTX_BLK_UNUSED)
4828 continue;
4829
4830 if (type != HTX_BLK_HDR)
4831 break;
4832
Willy Tarreau7838a792019-08-12 18:42:03 +02004833 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
4834 TRACE_PROTO("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02004835 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004836 }
Willy Tarreau80739692018-10-05 11:35:57 +02004837
4838 list[hdr].n = htx_get_blk_name(htx, blk);
4839 list[hdr].v = htx_get_blk_value(htx, blk);
Christopher Faulet67d58092019-10-02 10:51:38 +02004840
4841 /* Skip header if same name is used to add the server name */
4842 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name &&
4843 isteq(list[hdr].n, ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len)))
4844 continue;
4845
Willy Tarreau80739692018-10-05 11:35:57 +02004846 hdr++;
4847 }
4848
Christopher Faulet72ba6cd2019-09-24 16:20:05 +02004849 /* Now add the server name to a header (if requested) */
4850 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name) {
4851 struct server *srv = objt_server(h2c->conn->target);
4852
4853 if (srv) {
4854 list[hdr].n = ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len);
4855 list[hdr].v = ist(srv->id);
4856 hdr++;
4857 }
4858 }
4859
Willy Tarreau80739692018-10-05 11:35:57 +02004860 /* marker for end of headers */
4861 list[hdr].n = ist("");
4862
Willy Tarreau9c218e72019-05-26 10:08:28 +02004863 mbuf = br_tail(h2c->mbuf);
4864 retry:
4865 if (!h2_get_buf(h2c, mbuf)) {
4866 h2c->flags |= H2_CF_MUX_MALLOC;
4867 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02004868 TRACE_STATE("waiting for room in output buffer", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau9c218e72019-05-26 10:08:28 +02004869 return 0;
4870 }
4871
Willy Tarreau80739692018-10-05 11:35:57 +02004872 chunk_reset(&outbuf);
4873
4874 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004875 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
4876 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02004877 break;
4878 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02004879 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau80739692018-10-05 11:35:57 +02004880 }
4881
4882 if (outbuf.size < 9)
4883 goto full;
4884
4885 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
4886 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
4887 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4888 outbuf.data = 9;
4889
4890 /* encode the method, which necessarily is the first one */
Willy Tarreaubdabc3a2018-12-10 18:25:11 +01004891 if (!hpack_encode_method(&outbuf, sl->info.req.meth, meth)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004892 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02004893 goto realign_again;
4894 goto full;
4895 }
4896
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004897 auth = ist(NULL);
4898
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004899 /* RFC7540 #8.3: the CONNECT method must have :
4900 * - :authority set to the URI part (host:port)
4901 * - :method set to CONNECT
4902 * - :scheme and :path omitted
4903 */
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004904 if (unlikely(sl->info.req.meth == HTTP_METH_CONNECT)) {
4905 auth = uri;
4906
4907 if (!hpack_encode_header(&outbuf, ist(":authority"), auth)) {
4908 /* output full */
4909 if (b_space_wraps(mbuf))
4910 goto realign_again;
4911 goto full;
4912 }
4913 } else {
4914 /* other methods need a :scheme. If an authority is known from
4915 * the request line, it must be sent, otherwise only host is
4916 * sent. Host is never sent as the authority.
4917 */
4918 struct ist scheme = { };
Christopher Faulet3b44c542019-06-14 10:46:51 +02004919
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004920 if (uri.ptr[0] != '/' && uri.ptr[0] != '*') {
4921 /* the URI seems to start with a scheme */
4922 int len = 1;
4923
4924 while (len < uri.len && uri.ptr[len] != ':')
4925 len++;
4926
4927 if (len + 2 < uri.len && uri.ptr[len + 1] == '/' && uri.ptr[len + 2] == '/') {
4928 /* make the uri start at the authority now */
4929 scheme.ptr = uri.ptr;
4930 scheme.len = len,
4931 uri.ptr += len + 3;
4932 uri.len -= len + 3;
4933
4934 /* find the auth part of the URI */
4935 auth.ptr = uri.ptr;
4936 auth.len = 0;
4937 while (auth.len < uri.len && auth.ptr[auth.len] != '/')
4938 auth.len++;
4939
4940 uri.ptr += auth.len;
4941 uri.len -= auth.len;
4942 }
4943 }
4944
4945 if (!scheme.len) {
4946 /* no explicit scheme, we're using an origin-form URI,
4947 * probably from an H1 request transcoded to H2 via an
4948 * external layer, then received as H2 without authority.
4949 * So we have to look up the scheme from the HTX flags.
4950 * In such a case only http and https are possible, and
4951 * https is the default (sent by browsers).
4952 */
4953 if ((sl->flags & (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP)) == (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP))
4954 scheme = ist("http");
4955 else
4956 scheme = ist("https");
4957 }
Christopher Faulet3b44c542019-06-14 10:46:51 +02004958
4959 if (!hpack_encode_scheme(&outbuf, scheme)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004960 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004961 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004962 goto realign_again;
4963 goto full;
4964 }
Willy Tarreau80739692018-10-05 11:35:57 +02004965
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004966 if (auth.len && !hpack_encode_header(&outbuf, ist(":authority"), auth)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004967 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004968 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004969 goto realign_again;
4970 goto full;
4971 }
Willy Tarreau053c1572019-02-01 16:13:59 +01004972
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004973 /* encode the path. RFC7540#8.1.2.3: if path is empty it must
4974 * be sent as '/' or '*'.
4975 */
4976 if (unlikely(!uri.len)) {
4977 if (sl->info.req.meth == HTTP_METH_OPTIONS)
4978 uri = ist("*");
4979 else
4980 uri = ist("/");
Willy Tarreau053c1572019-02-01 16:13:59 +01004981 }
Willy Tarreau053c1572019-02-01 16:13:59 +01004982
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004983 if (!hpack_encode_path(&outbuf, uri)) {
4984 /* output full */
4985 if (b_space_wraps(mbuf))
4986 goto realign_again;
4987 goto full;
4988 }
Willy Tarreau80739692018-10-05 11:35:57 +02004989 }
4990
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004991 /* encode all headers, stop at empty name. Host is only sent if we
4992 * do not provide an authority.
4993 */
Willy Tarreau80739692018-10-05 11:35:57 +02004994 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
4995 /* these ones do not exist in H2 and must be dropped. */
4996 if (isteq(list[hdr].n, ist("connection")) ||
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004997 (auth.len && isteq(list[hdr].n, ist("host"))) ||
Willy Tarreau80739692018-10-05 11:35:57 +02004998 isteq(list[hdr].n, ist("proxy-connection")) ||
4999 isteq(list[hdr].n, ist("keep-alive")) ||
5000 isteq(list[hdr].n, ist("upgrade")) ||
5001 isteq(list[hdr].n, ist("transfer-encoding")))
5002 continue;
5003
Christopher Faulet86d144c2019-08-14 16:32:25 +02005004 /* Skip all pseudo-headers */
5005 if (*(list[hdr].n.ptr) == ':')
5006 continue;
5007
Willy Tarreau80739692018-10-05 11:35:57 +02005008 if (isteq(list[hdr].n, ist("")))
5009 break; // end
5010
5011 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
5012 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005013 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005014 goto realign_again;
5015 goto full;
5016 }
5017 }
5018
Willy Tarreaucb985a42019-10-07 16:56:34 +02005019 /* update the frame's size */
5020 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5021
5022 if (outbuf.data > h2c->mfs + 9) {
5023 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5024 /* output full */
5025 if (b_space_wraps(mbuf))
5026 goto realign_again;
5027 goto full;
5028 }
5029 }
5030
Willy Tarreau80739692018-10-05 11:35:57 +02005031 /* we may need to add END_STREAM if we have no body :
5032 * - request already closed, or :
5033 * - no transfer-encoding, and :
5034 * - no content-length or content-length:0
5035 * Fixme: this doesn't take into account CONNECT requests.
5036 */
5037 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM)
5038 es_now = 1;
5039
5040 if (sl->flags & HTX_SL_F_BODYLESS)
5041 es_now = 1;
5042
Willy Tarreau927b88b2019-03-04 08:03:25 +01005043 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW)
Willy Tarreau80739692018-10-05 11:35:57 +02005044 es_now = 1;
5045
Willy Tarreau80739692018-10-05 11:35:57 +02005046 if (es_now)
5047 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5048
5049 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02005050 TRACE_USER("sent H2 request", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
Willy Tarreaubcc45952019-05-26 10:05:50 +02005051 b_add(mbuf, outbuf.data);
Willy Tarreau80739692018-10-05 11:35:57 +02005052 h2s->flags |= H2_SF_HEADERS_SENT;
5053 h2s->st = H2_SS_OPEN;
5054
Willy Tarreau80739692018-10-05 11:35:57 +02005055 if (es_now) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005056 TRACE_PROTO("setting ES on HEADERS frame", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
Willy Tarreau80739692018-10-05 11:35:57 +02005057 // trim any possibly pending data (eg: inconsistent content-length)
5058 h2s->flags |= H2_SF_ES_SENT;
5059 h2s->st = H2_SS_HLOC;
5060 }
5061
5062 /* remove all header blocks including the EOH and compute the
5063 * corresponding size.
5064 *
5065 * FIXME: We should remove everything when es_now is set.
5066 */
5067 ret = 0;
5068 idx = htx_get_head(htx);
5069 blk = htx_get_blk(htx, idx);
5070 while (blk != blk_end) {
5071 ret += htx_get_blksz(blk);
5072 blk = htx_remove_blk(htx, blk);
5073 }
5074
Christopher Faulet316934d2019-05-15 14:22:48 +02005075 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
5076 ret += htx_get_blksz(blk_end);
Willy Tarreau80739692018-10-05 11:35:57 +02005077 htx_remove_blk(htx, blk_end);
Christopher Faulet316934d2019-05-15 14:22:48 +02005078 }
Willy Tarreau80739692018-10-05 11:35:57 +02005079
5080 end:
5081 return ret;
5082 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005083 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5084 goto retry;
Willy Tarreau80739692018-10-05 11:35:57 +02005085 h2c->flags |= H2_CF_MUX_MFULL;
5086 h2s->flags |= H2_SF_BLK_MROOM;
5087 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005088 TRACE_STATE("mux buffer full", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02005089 goto end;
5090 fail:
5091 /* unparsable HTX messages, too large ones to be produced in the local
5092 * list etc go here (unrecoverable errors).
5093 */
5094 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5095 ret = 0;
5096 goto end;
5097}
5098
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005099/* Try to send a DATA frame matching HTTP response present in HTX structure
Willy Tarreau98de12a2018-12-12 07:03:00 +01005100 * present in <buf>, for stream <h2s>. Returns the number of bytes sent. The
5101 * caller must check the stream's status to detect any error which might have
5102 * happened subsequently to a successful send. Returns the number of data bytes
Christopher Faulet54b5e212019-06-04 10:08:28 +02005103 * consumed, or zero if nothing done. Note that EOM count for 1 byte.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005104 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005105static size_t h2s_frt_make_resp_data(struct h2s *h2s, struct buffer *buf, size_t count)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005106{
5107 struct h2c *h2c = h2s->h2c;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005108 struct htx *htx;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005109 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005110 struct buffer *mbuf;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005111 size_t total = 0;
5112 int es_now = 0;
5113 int bsize; /* htx block size */
5114 int fsize; /* h2 frame size */
5115 struct htx_blk *blk;
5116 enum htx_blk_type type;
5117 int idx;
5118
Willy Tarreau7838a792019-08-12 18:42:03 +02005119 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5120
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005121 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005122 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005123 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005124 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005125 goto end;
5126 }
5127
Willy Tarreau98de12a2018-12-12 07:03:00 +01005128 htx = htx_from_buf(buf);
5129
Christopher Faulet54b5e212019-06-04 10:08:28 +02005130 /* We only come here with HTX_BLK_DATA blocks. However, while looping,
5131 * we can meet an HTX_BLK_EOM block that we'll leave to the caller to
5132 * handle.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005133 */
5134
5135 new_frame:
Willy Tarreauee573762018-12-04 15:25:57 +01005136 if (!count || htx_is_empty(htx))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005137 goto end;
5138
5139 idx = htx_get_head(htx);
5140 blk = htx_get_blk(htx, idx);
Christopher Faulet54b5e212019-06-04 10:08:28 +02005141 type = htx_get_blk_type(blk); // DATA or EOM
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005142 bsize = htx_get_blksz(blk);
5143 fsize = bsize;
5144
Christopher Faulet54b5e212019-06-04 10:08:28 +02005145 if (type == HTX_BLK_EOM) {
Willy Tarreau7eeb10a2019-01-04 09:28:17 +01005146 if (h2s->flags & H2_SF_ES_SENT) {
5147 /* ES already sent */
5148 htx_remove_blk(htx, blk);
5149 total++; // EOM counts as one byte
5150 count--;
5151 goto end;
5152 }
5153 }
5154 else if (type != HTX_BLK_DATA)
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005155 goto end;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005156
Willy Tarreau9c218e72019-05-26 10:08:28 +02005157 mbuf = br_tail(h2c->mbuf);
5158 retry:
5159 if (!h2_get_buf(h2c, mbuf)) {
5160 h2c->flags |= H2_CF_MUX_MALLOC;
5161 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005162 TRACE_STATE("waiting for room in output buffer", H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau9c218e72019-05-26 10:08:28 +02005163 goto end;
5164 }
5165
Willy Tarreau98de12a2018-12-12 07:03:00 +01005166 /* Perform some optimizations to reduce the number of buffer copies.
5167 * First, if the mux's buffer is empty and the htx area contains
5168 * exactly one data block of the same size as the requested count, and
5169 * this count fits within the frame size, the stream's window size, and
5170 * the connection's window size, then it's possible to simply swap the
5171 * caller's buffer with the mux's output buffer and adjust offsets and
5172 * length to match the entire DATA HTX block in the middle. In this
5173 * case we perform a true zero-copy operation from end-to-end. This is
5174 * the situation that happens all the time with large files. Second, if
5175 * this is not possible, but the mux's output buffer is empty, we still
5176 * have an opportunity to avoid the copy to the intermediary buffer, by
5177 * making the intermediary buffer's area point to the output buffer's
5178 * area. In this case we want to skip the HTX header to make sure that
5179 * copies remain aligned and that this operation remains possible all
5180 * the time. This goes for headers, data blocks and any data extracted
5181 * from the HTX blocks.
5182 */
5183 if (unlikely(fsize == count &&
Christopher Faulet192c6a22019-06-11 16:32:24 +02005184 htx_nbblks(htx) == 1 && type == HTX_BLK_DATA &&
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005185 fsize <= h2s_mws(h2s) && fsize <= h2c->mws && fsize <= h2c->mfs)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005186 void *old_area = mbuf->area;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005187
Willy Tarreaubcc45952019-05-26 10:05:50 +02005188 if (b_data(mbuf)) {
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005189 /* Too bad there are data left there. We're willing to memcpy/memmove
5190 * up to 1/4 of the buffer, which means that it's OK to copy a large
5191 * frame into a buffer containing few data if it needs to be realigned,
5192 * and that it's also OK to copy few data without realigning. Otherwise
5193 * we'll pretend the mbuf is full and wait for it to become empty.
Willy Tarreau98de12a2018-12-12 07:03:00 +01005194 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005195 if (fsize + 9 <= b_room(mbuf) &&
5196 (b_data(mbuf) <= b_size(mbuf) / 4 ||
Willy Tarreau7838a792019-08-12 18:42:03 +02005197 (fsize <= b_size(mbuf) / 4 && fsize + 9 <= b_contig_space(mbuf)))) {
5198 TRACE_STATE("small data present in output buffer, appending", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005199 goto copy;
Willy Tarreau7838a792019-08-12 18:42:03 +02005200 }
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005201
Willy Tarreau9c218e72019-05-26 10:08:28 +02005202 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5203 goto retry;
5204
Willy Tarreau98de12a2018-12-12 07:03:00 +01005205 h2c->flags |= H2_CF_MUX_MFULL;
5206 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005207 TRACE_STATE("too large data present in output buffer, waiting for emptiness", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005208 goto end;
5209 }
5210
5211 /* map an H2 frame to the HTX block so that we can put the
5212 * frame header there.
5213 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005214 *mbuf = b_make(buf->area, buf->size, sizeof(struct htx) + blk->addr - 9, fsize + 9);
5215 outbuf.area = b_head(mbuf);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005216
5217 /* prepend an H2 DATA frame header just before the DATA block */
5218 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5219 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5220 h2_set_frame_size(outbuf.area, fsize);
5221
5222 /* update windows */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005223 h2s->sws -= fsize;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005224 h2c->mws -= fsize;
5225
5226 /* and exchange with our old area */
5227 buf->area = old_area;
5228 buf->data = buf->head = 0;
5229 total += fsize;
Willy Tarreau7838a792019-08-12 18:42:03 +02005230
5231 TRACE_PROTO("sent H2 DATA frame (zero-copy)", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005232 goto end;
5233 }
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005234
Willy Tarreau98de12a2018-12-12 07:03:00 +01005235 copy:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005236 /* for DATA and EOM we'll have to emit a frame, even if empty */
5237
5238 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005239 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5240 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005241 break;
5242 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005243 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005244 }
5245
5246 if (outbuf.size < 9) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02005247 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5248 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005249 h2c->flags |= H2_CF_MUX_MFULL;
5250 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005251 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005252 goto end;
5253 }
5254
5255 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
5256 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5257 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5258 outbuf.data = 9;
5259
5260 /* we have in <fsize> the exact number of bytes we need to copy from
5261 * the HTX buffer. We need to check this against the connection's and
5262 * the stream's send windows, and to ensure that this fits in the max
5263 * frame size and in the buffer's available space minus 9 bytes (for
5264 * the frame header). The connection's flow control is applied last so
5265 * that we can use a separate list of streams which are immediately
5266 * unblocked on window opening. Note: we don't implement padding.
5267 */
5268
5269 /* EOM is presented with bsize==1 but would lead to the emission of an
5270 * empty frame, thus we force it to zero here.
5271 */
5272 if (type == HTX_BLK_EOM)
5273 bsize = fsize = 0;
5274
5275 if (!fsize)
5276 goto send_empty;
5277
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005278 if (h2s_mws(h2s) <= 0) {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005279 h2s->flags |= H2_SF_BLK_SFCTL;
Willy Tarreauc234ae32019-05-13 17:56:11 +02005280 if (LIST_ADDED(&h2s->list))
Olivier Houchardbfe2a832019-05-10 14:02:21 +02005281 LIST_DEL_INIT(&h2s->list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +02005282 LIST_ADDQ(&h2c->blocked_list, &h2s->list);
Willy Tarreau7838a792019-08-12 18:42:03 +02005283 TRACE_STATE("stream window <=0, flow-controlled", H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_H2S_FCTL, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005284 goto end;
5285 }
5286
Willy Tarreauee573762018-12-04 15:25:57 +01005287 if (fsize > count)
5288 fsize = count;
5289
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005290 if (fsize > h2s_mws(h2s))
5291 fsize = h2s_mws(h2s); // >0
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005292
5293 if (h2c->mfs && fsize > h2c->mfs)
5294 fsize = h2c->mfs; // >0
5295
5296 if (fsize + 9 > outbuf.size) {
Willy Tarreau455d5682019-05-24 19:42:18 +02005297 /* It doesn't fit at once. If it at least fits once split and
5298 * the amount of data to move is low, let's defragment the
5299 * buffer now.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005300 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005301 if (b_space_wraps(mbuf) &&
5302 (fsize + 9 <= b_room(mbuf)) &&
5303 b_data(mbuf) <= MAX_DATA_REALIGN)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005304 goto realign_again;
5305 fsize = outbuf.size - 9;
5306
5307 if (fsize <= 0) {
5308 /* no need to send an empty frame here */
Willy Tarreau9c218e72019-05-26 10:08:28 +02005309 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5310 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005311 h2c->flags |= H2_CF_MUX_MFULL;
5312 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005313 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005314 goto end;
5315 }
5316 }
5317
5318 if (h2c->mws <= 0) {
5319 h2s->flags |= H2_SF_BLK_MFCTL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005320 TRACE_STATE("connection window <=0, stream flow-controlled", H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_H2C_FCTL, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005321 goto end;
5322 }
5323
5324 if (fsize > h2c->mws)
5325 fsize = h2c->mws;
5326
5327 /* now let's copy this this into the output buffer */
5328 memcpy(outbuf.area + 9, htx_get_blk_ptr(htx, blk), fsize);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005329 h2s->sws -= fsize;
Willy Tarreau0f799ca2018-12-04 15:20:11 +01005330 h2c->mws -= fsize;
Willy Tarreauee573762018-12-04 15:25:57 +01005331 count -= fsize;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005332
5333 send_empty:
5334 /* update the frame's size */
5335 h2_set_frame_size(outbuf.area, fsize);
5336
5337 /* FIXME: for now we only set the ES flag on empty DATA frames, once
5338 * meeting EOM. We should optimize this later.
5339 */
5340 if (type == HTX_BLK_EOM) {
Willy Tarreauee573762018-12-04 15:25:57 +01005341 total++; // EOM counts as one byte
5342 count--;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005343 es_now = 1;
5344 }
5345
5346 if (es_now)
5347 outbuf.area[4] |= H2_F_DATA_END_STREAM;
5348
5349 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005350 b_add(mbuf, fsize + 9);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005351
5352 /* consume incoming HTX block, including EOM */
5353 total += fsize;
5354 if (fsize == bsize) {
5355 htx_remove_blk(htx, blk);
Willy Tarreau7838a792019-08-12 18:42:03 +02005356 if (fsize) {
5357 TRACE_DEVEL("more data available, trying to send another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005358 goto new_frame;
Willy Tarreau7838a792019-08-12 18:42:03 +02005359 }
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005360 } else {
5361 /* we've truncated this block */
5362 htx_cut_data_blk(htx, blk, fsize);
5363 }
5364
5365 if (es_now) {
5366 if (h2s->st == H2_SS_OPEN)
5367 h2s->st = H2_SS_HLOC;
5368 else
5369 h2s_close(h2s);
5370
5371 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005372 TRACE_PROTO("ES flag set on outgoing frame", H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005373 }
5374
5375 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005376 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005377 return total;
5378}
5379
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005380/* Try to send a HEADERS frame matching HTX_BLK_TLR series of blocks present in
5381 * HTX message <htx> for the H2 stream <h2s>. Returns the number of bytes
5382 * processed. The caller must check the stream's status to detect any error
5383 * which might have happened subsequently to a successful send. The htx blocks
5384 * are automatically removed from the message. The htx message is assumed to be
5385 * valid since produced from the internal code. Processing stops when meeting
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005386 * the EOM, which is *not* removed. All trailers are processed at once and sent
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005387 * as a single frame. The ES flag is always set.
5388 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005389static size_t h2s_make_trailers(struct h2s *h2s, struct htx *htx)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005390{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005391 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005392 struct h2c *h2c = h2s->h2c;
5393 struct htx_blk *blk;
5394 struct htx_blk *blk_end;
5395 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005396 struct buffer *mbuf;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005397 enum htx_blk_type type;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005398 int ret = 0;
5399 int hdr;
5400 int idx;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005401
Willy Tarreau7838a792019-08-12 18:42:03 +02005402 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5403
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005404 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005405 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005406 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005407 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005408 goto end;
5409 }
5410
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005411 /* determine the first block which must not be deleted, blk_end may
5412 * be NULL if all blocks have to be deleted. also get trailers.
5413 */
5414 idx = htx_get_head(htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005415 blk_end = NULL;
5416
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005417 hdr = 0;
5418 while (idx != -1) {
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005419 blk = htx_get_blk(htx, idx);
5420 type = htx_get_blk_type(blk);
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005421 idx = htx_get_next(htx, idx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005422 if (type == HTX_BLK_UNUSED)
5423 continue;
5424
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005425 if (type == HTX_BLK_EOT) {
5426 if (idx != -1)
5427 blk_end = blk;
5428 break;
5429 }
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005430 if (type != HTX_BLK_TLR)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005431 break;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005432
Willy Tarreau7838a792019-08-12 18:42:03 +02005433 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5434 TRACE_PROTO("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005435 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005436 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005437
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005438 list[hdr].n = htx_get_blk_name(htx, blk);
5439 list[hdr].v = htx_get_blk_value(htx, blk);
5440 hdr++;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005441 }
5442
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005443 /* marker for end of trailers */
5444 list[hdr].n = ist("");
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005445
Willy Tarreau9c218e72019-05-26 10:08:28 +02005446 mbuf = br_tail(h2c->mbuf);
5447 retry:
5448 if (!h2_get_buf(h2c, mbuf)) {
5449 h2c->flags |= H2_CF_MUX_MALLOC;
5450 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005451 TRACE_STATE("waiting for room in output buffer", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau9c218e72019-05-26 10:08:28 +02005452 goto end;
5453 }
5454
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005455 chunk_reset(&outbuf);
5456
5457 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005458 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5459 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005460 break;
5461 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005462 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005463 }
5464
5465 if (outbuf.size < 9)
5466 goto full;
5467
5468 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4,ES=1 */
5469 memcpy(outbuf.area, "\x00\x00\x00\x01\x05", 5);
5470 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5471 outbuf.data = 9;
5472
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005473 /* encode all headers */
5474 for (idx = 0; idx < hdr; idx++) {
5475 /* these ones do not exist in H2 or must not appear in
5476 * trailers and must be dropped.
5477 */
5478 if (isteq(list[idx].n, ist("host")) ||
5479 isteq(list[idx].n, ist("content-length")) ||
5480 isteq(list[idx].n, ist("connection")) ||
5481 isteq(list[idx].n, ist("proxy-connection")) ||
5482 isteq(list[idx].n, ist("keep-alive")) ||
5483 isteq(list[idx].n, ist("upgrade")) ||
5484 isteq(list[idx].n, ist("te")) ||
5485 isteq(list[idx].n, ist("transfer-encoding")))
5486 continue;
5487
Christopher Faulet86d144c2019-08-14 16:32:25 +02005488 /* Skip all pseudo-headers */
5489 if (*(list[idx].n.ptr) == ':')
5490 continue;
5491
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005492 if (!hpack_encode_header(&outbuf, list[idx].n, list[idx].v)) {
5493 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005494 if (b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005495 goto realign_again;
5496 goto full;
5497 }
5498 }
5499
Willy Tarreau5121e5d2019-05-06 15:13:41 +02005500 if (outbuf.data == 9) {
5501 /* here we have a problem, we have nothing to emit (either we
5502 * received an empty trailers block followed or we removed its
5503 * contents above). Because of this we can't send a HEADERS
5504 * frame, so we have to cheat and instead send an empty DATA
5505 * frame conveying the ES flag.
Willy Tarreau67b8cae2019-02-21 18:16:35 +01005506 */
5507 outbuf.area[3] = H2_FT_DATA;
5508 outbuf.area[4] = H2_F_DATA_END_STREAM;
5509 }
5510
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005511 /* update the frame's size */
5512 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5513
5514 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02005515 TRACE_PROTO("sent H2 trailers HEADERS frame", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_TX_EOI, h2c->conn, h2s);
Willy Tarreaubcc45952019-05-26 10:05:50 +02005516 b_add(mbuf, outbuf.data);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005517 h2s->flags |= H2_SF_ES_SENT;
5518
5519 if (h2s->st == H2_SS_OPEN)
5520 h2s->st = H2_SS_HLOC;
5521 else
5522 h2s_close(h2s);
5523
5524 /* OK we could properly deliver the response */
5525 done:
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005526 /* remove all header blocks till the end and compute the corresponding size. */
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005527 ret = 0;
5528 idx = htx_get_head(htx);
5529 blk = htx_get_blk(htx, idx);
5530 while (blk != blk_end) {
5531 ret += htx_get_blksz(blk);
5532 blk = htx_remove_blk(htx, blk);
5533 }
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005534
5535 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
5536 ret += htx_get_blksz(blk_end);
5537 htx_remove_blk(htx, blk_end);
5538 }
5539
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005540 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005541 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005542 return ret;
5543 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005544 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5545 goto retry;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005546 h2c->flags |= H2_CF_MUX_MFULL;
5547 h2s->flags |= H2_SF_BLK_MROOM;
5548 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005549 TRACE_STATE("mux buffer full", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005550 goto end;
5551 fail:
5552 /* unparsable HTX messages, too large ones to be produced in the local
5553 * list etc go here (unrecoverable errors).
5554 */
5555 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5556 ret = 0;
5557 goto end;
5558}
5559
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005560/* Called from the upper layer, to subscribe to events, such as being able to send.
5561 * The <param> argument here is supposed to be a pointer to a wait_event struct
5562 * which will be passed to h2s->recv_wait or h2s->send_wait depending on the
5563 * event_type. The event_type must only be a combination of SUB_RETRY_RECV and
5564 * SUB_RETRY_SEND, other values will lead to -1 being returned. It always
5565 * returns 0 except for the error above.
5566 */
Olivier Houchard6ff20392018-07-17 18:46:31 +02005567static int h2_subscribe(struct conn_stream *cs, int event_type, void *param)
5568{
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005569 struct wait_event *sw;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005570 struct h2s *h2s = cs->ctx;
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02005571 struct h2c *h2c = h2s->h2c;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005572
Willy Tarreau7838a792019-08-12 18:42:03 +02005573 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005574 if (event_type & SUB_RETRY_RECV) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005575 TRACE_DEVEL("subscribe(recv)", H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02005576 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005577 BUG_ON(h2s->recv_wait != NULL || (sw->events & SUB_RETRY_RECV));
5578 sw->events |= SUB_RETRY_RECV;
5579 h2s->recv_wait = sw;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005580 event_type &= ~SUB_RETRY_RECV;
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005581 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005582 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005583 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2c->conn, h2s);
Olivier Houchard6ff20392018-07-17 18:46:31 +02005584 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005585 BUG_ON(h2s->send_wait != NULL || (sw->events & SUB_RETRY_SEND));
5586 sw->events |= SUB_RETRY_SEND;
5587 h2s->send_wait = sw;
5588 if (!(h2s->flags & H2_SF_BLK_SFCTL) &&
5589 !LIST_ADDED(&h2s->list)) {
5590 if (h2s->flags & H2_SF_BLK_MFCTL)
5591 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
5592 else
5593 LIST_ADDQ(&h2c->send_list, &h2s->list);
Olivier Houcharde1c6dbc2018-08-01 17:06:43 +02005594 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005595 event_type &= ~SUB_RETRY_SEND;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005596 }
Willy Tarreau7838a792019-08-12 18:42:03 +02005597 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005598 if (event_type != 0)
5599 return -1;
5600 return 0;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005601}
5602
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005603/* Called from the upper layer, to unsubscribe some events (undo h2_subscribe).
5604 * The <param> argument here is supposed to be a pointer to the same wait_event
5605 * struct that was passed to h2_subscribe() otherwise nothing will be changed.
5606 * It always returns zero.
5607 */
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005608static int h2_unsubscribe(struct conn_stream *cs, int event_type, void *param)
5609{
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005610 struct wait_event *sw;
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005611 struct h2s *h2s = cs->ctx;
5612
Willy Tarreau7838a792019-08-12 18:42:03 +02005613 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005614 if (event_type & SUB_RETRY_RECV) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005615 TRACE_DEVEL("unsubscribe(recv)", H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005616 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005617 BUG_ON(h2s->recv_wait != sw);
5618 sw->events &= ~SUB_RETRY_RECV;
5619 h2s->recv_wait = NULL;
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005620 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005621 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005622 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005623 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005624 BUG_ON(h2s->send_wait != sw);
5625 LIST_DEL(&h2s->list);
5626 LIST_INIT(&h2s->list);
5627 sw->events &= ~SUB_RETRY_SEND;
5628 /* We were about to send, make sure it does not happen */
5629 if (LIST_ADDED(&h2s->sending_list) &&
5630 h2s->send_wait != &h2s->wait_event) {
Willy Tarreau86eded62019-06-14 14:47:49 +02005631 tasklet_remove_from_tasklet_list(h2s->send_wait->tasklet);
Olivier Houchardf8338152019-05-14 17:50:32 +02005632 LIST_DEL_INIT(&h2s->sending_list);
Olivier Houchardd846c262018-10-19 17:24:29 +02005633 }
Olivier Houchardf8338152019-05-14 17:50:32 +02005634 h2s->send_wait = NULL;
Olivier Houchardd846c262018-10-19 17:24:29 +02005635 }
Willy Tarreau7838a792019-08-12 18:42:03 +02005636 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005637 return 0;
5638}
5639
5640
Olivier Houchard511efea2018-08-16 15:30:32 +02005641/* Called from the upper layer, to receive data */
5642static size_t h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
5643{
Olivier Houchard638b7992018-08-16 15:41:52 +02005644 struct h2s *h2s = cs->ctx;
Willy Tarreau082f5592018-11-25 08:03:32 +01005645 struct h2c *h2c = h2s->h2c;
Willy Tarreau86724e22018-12-01 23:19:43 +01005646 struct htx *h2s_htx = NULL;
5647 struct htx *buf_htx = NULL;
Olivier Houchard511efea2018-08-16 15:30:32 +02005648 size_t ret = 0;
5649
Willy Tarreau7838a792019-08-12 18:42:03 +02005650 TRACE_ENTER(H2_EV_STRM_RECV, h2c->conn, h2s);
5651
Olivier Houchard511efea2018-08-16 15:30:32 +02005652 /* transfer possibly pending data to the upper layer */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005653 h2s_htx = htx_from_buf(&h2s->rxbuf);
5654 if (htx_is_empty(h2s_htx)) {
5655 /* Here htx_to_buf() will set buffer data to 0 because
5656 * the HTX is empty.
5657 */
5658 htx_to_buf(h2s_htx, &h2s->rxbuf);
5659 goto end;
5660 }
Willy Tarreau7196dd62019-03-05 10:51:11 +01005661
Christopher Faulet9b79a102019-07-15 11:22:56 +02005662 ret = h2s_htx->data;
5663 buf_htx = htx_from_buf(buf);
Willy Tarreau7196dd62019-03-05 10:51:11 +01005664
Christopher Faulet9b79a102019-07-15 11:22:56 +02005665 /* <buf> is empty and the message is small enough, swap the
5666 * buffers. */
5667 if (htx_is_empty(buf_htx) && htx_used_space(h2s_htx) <= count) {
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005668 htx_to_buf(buf_htx, buf);
5669 htx_to_buf(h2s_htx, &h2s->rxbuf);
Christopher Faulet9b79a102019-07-15 11:22:56 +02005670 b_xfer(buf, &h2s->rxbuf, b_data(&h2s->rxbuf));
5671 goto end;
Willy Tarreau86724e22018-12-01 23:19:43 +01005672 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02005673
5674 htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_EOM);
5675
5676 if (h2s_htx->flags & HTX_FL_PARSING_ERROR) {
5677 buf_htx->flags |= HTX_FL_PARSING_ERROR;
5678 if (htx_is_empty(buf_htx))
5679 cs->flags |= CS_FL_EOI;
Willy Tarreau86724e22018-12-01 23:19:43 +01005680 }
Olivier Houchard511efea2018-08-16 15:30:32 +02005681
Christopher Faulet9b79a102019-07-15 11:22:56 +02005682 buf_htx->extra = (h2s_htx->extra ? (h2s_htx->data + h2s_htx->extra) : 0);
5683 htx_to_buf(buf_htx, buf);
5684 htx_to_buf(h2s_htx, &h2s->rxbuf);
5685 ret -= h2s_htx->data;
5686
Christopher Faulet37070b22019-02-14 15:12:14 +01005687 end:
Olivier Houchard638b7992018-08-16 15:41:52 +02005688 if (b_data(&h2s->rxbuf))
Olivier Houchardd247be02018-12-06 16:22:29 +01005689 cs->flags |= (CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02005690 else {
Olivier Houchardd247be02018-12-06 16:22:29 +01005691 cs->flags &= ~(CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Christopher Fauletfa922f02019-05-07 10:55:17 +02005692 if (h2s->flags & H2_SF_ES_RCVD)
5693 cs->flags |= CS_FL_EOI;
Willy Tarreau76c83822019-06-15 09:55:50 +02005694 if (conn_xprt_read0_pending(h2c->conn) || h2s->st == H2_SS_CLOSED)
Olivier Houchard511efea2018-08-16 15:30:32 +02005695 cs->flags |= CS_FL_EOS;
Olivier Houchard71748cb2018-12-17 14:16:46 +01005696 if (cs->flags & CS_FL_ERR_PENDING)
5697 cs->flags |= CS_FL_ERROR;
Olivier Houchard638b7992018-08-16 15:41:52 +02005698 if (b_size(&h2s->rxbuf)) {
5699 b_free(&h2s->rxbuf);
5700 offer_buffers(NULL, tasks_run_queue);
5701 }
Olivier Houchard511efea2018-08-16 15:30:32 +02005702 }
5703
Willy Tarreau082f5592018-11-25 08:03:32 +01005704 if (ret && h2c->dsi == h2s->id) {
5705 /* demux is blocking on this stream's buffer */
5706 h2c->flags &= ~H2_CF_DEM_SFULL;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02005707 h2c_restart_reading(h2c, 1);
Willy Tarreau082f5592018-11-25 08:03:32 +01005708 }
Christopher Faulet37070b22019-02-14 15:12:14 +01005709
Willy Tarreau7838a792019-08-12 18:42:03 +02005710 TRACE_LEAVE(H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard511efea2018-08-16 15:30:32 +02005711 return ret;
5712}
5713
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005714/* stops all senders of this connection for example when the mux buffer is full.
5715 * They are moved from the sending_list to either fctl_list or send_list.
5716 */
Olivier Houchardd846c262018-10-19 17:24:29 +02005717static void h2_stop_senders(struct h2c *h2c)
5718{
5719 struct h2s *h2s, *h2s_back;
5720
Olivier Houchardd360ac62019-03-22 17:37:16 +01005721 list_for_each_entry_safe(h2s, h2s_back, &h2c->sending_list, sending_list) {
5722 LIST_DEL_INIT(&h2s->sending_list);
Willy Tarreau86eded62019-06-14 14:47:49 +02005723 tasklet_remove_from_tasklet_list(h2s->send_wait->tasklet);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005724 h2s->send_wait->events |= SUB_RETRY_SEND;
Olivier Houchardd846c262018-10-19 17:24:29 +02005725 }
5726}
5727
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005728/* Called from the upper layer, to send data from buffer <buf> for no more than
5729 * <count> bytes. Returns the number of bytes effectively sent. Some status
5730 * flags may be updated on the conn_stream.
5731 */
Christopher Fauletd44a9b32018-07-27 11:59:41 +02005732static size_t h2_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
Willy Tarreau62f52692017-10-08 23:01:42 +02005733{
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005734 struct h2s *h2s = cs->ctx;
Willy Tarreau1dc41e72018-06-14 13:21:28 +02005735 size_t total = 0;
Willy Tarreau5dd17352018-06-14 13:33:30 +02005736 size_t ret;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005737 struct htx *htx;
5738 struct htx_blk *blk;
5739 enum htx_blk_type btype;
5740 uint32_t bsize;
5741 int32_t idx;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005742
Willy Tarreau7838a792019-08-12 18:42:03 +02005743 TRACE_ENTER(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
5744
Olivier Houchardd360ac62019-03-22 17:37:16 +01005745 /* If we were not just woken because we wanted to send but couldn't,
5746 * and there's somebody else that is waiting to send, do nothing,
5747 * we will subscribe later and be put at the end of the list
5748 */
Willy Tarreauc234ae32019-05-13 17:56:11 +02005749 if (!LIST_ADDED(&h2s->sending_list) &&
Willy Tarreau7838a792019-08-12 18:42:03 +02005750 (!LIST_ISEMPTY(&h2s->h2c->send_list) || !LIST_ISEMPTY(&h2s->h2c->fctl_list))) {
5751 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 Houchardd360ac62019-03-22 17:37:16 +01005752 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005753 }
Olivier Houchard998410a2019-04-15 19:23:37 +02005754 LIST_DEL_INIT(&h2s->sending_list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01005755
Olivier Houchard998410a2019-04-15 19:23:37 +02005756 /* We couldn't set it to NULL before, because we needed it in case
5757 * we had to cancel the tasklet
5758 */
5759 h2s->send_wait = NULL;
5760
Willy Tarreau7838a792019-08-12 18:42:03 +02005761 if (h2s->h2c->st0 < H2_CS_FRAME_H) {
5762 TRACE_DEVEL("connection not ready, leaving", H2_EV_H2S_SEND|H2_EV_H2S_BLK, h2s->h2c->conn, h2s);
Willy Tarreau6bf641a2018-10-08 09:43:03 +02005763 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005764 }
Willy Tarreau6bf641a2018-10-08 09:43:03 +02005765
Christopher Faulet9b79a102019-07-15 11:22:56 +02005766 htx = htx_from_buf(buf);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005767
Willy Tarreau0bad0432018-06-14 16:54:01 +02005768 if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count)
Willy Tarreauc4312d32017-11-07 12:01:53 +01005769 h2s->flags |= H2_SF_OUTGOING_DATA;
5770
Willy Tarreau751f2d02018-10-05 09:35:00 +02005771 if (h2s->id == 0) {
5772 int32_t id = h2c_get_next_sid(h2s->h2c);
5773
5774 if (id < 0) {
Willy Tarreau751f2d02018-10-05 09:35:00 +02005775 cs->flags |= CS_FL_ERROR;
Willy Tarreau7838a792019-08-12 18:42:03 +02005776 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 Tarreau751f2d02018-10-05 09:35:00 +02005777 return 0;
5778 }
5779
5780 eb32_delete(&h2s->by_id);
5781 h2s->by_id.key = h2s->id = id;
5782 h2s->h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01005783 h2s->h2c->nb_reserved--;
Willy Tarreau751f2d02018-10-05 09:35:00 +02005784 eb32_insert(&h2s->h2c->streams_by_id, &h2s->by_id);
5785 }
5786
Christopher Faulet9b79a102019-07-15 11:22:56 +02005787 while (h2s->st < H2_SS_HLOC && !(h2s->flags & H2_SF_BLK_ANY) &&
5788 count && !htx_is_empty(htx)) {
5789 idx = htx_get_head(htx);
5790 blk = htx_get_blk(htx, idx);
5791 btype = htx_get_blk_type(blk);
5792 bsize = htx_get_blksz(blk);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005793
Christopher Faulet9b79a102019-07-15 11:22:56 +02005794 switch (btype) {
Willy Tarreau80739692018-10-05 11:35:57 +02005795 case HTX_BLK_REQ_SL:
5796 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005797 ret = h2s_bck_make_req_headers(h2s, htx);
Willy Tarreau80739692018-10-05 11:35:57 +02005798 if (ret > 0) {
5799 total += ret;
5800 count -= ret;
5801 if (ret < bsize)
5802 goto done;
5803 }
5804 break;
5805
Willy Tarreau115e83b2018-12-01 19:17:53 +01005806 case HTX_BLK_RES_SL:
5807 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005808 ret = h2s_frt_make_resp_headers(h2s, htx);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005809 if (ret > 0) {
5810 total += ret;
5811 count -= ret;
5812 if (ret < bsize)
5813 goto done;
5814 }
5815 break;
5816
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005817 case HTX_BLK_DATA:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005818 case HTX_BLK_EOM:
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005819 /* all these cause the emission of a DATA frame (possibly empty).
5820 * This EOM necessarily is one before trailers, as the EOM following
5821 * trailers would have been consumed by the trailers parser.
5822 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005823 ret = h2s_frt_make_resp_data(h2s, buf, count);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005824 if (ret > 0) {
Willy Tarreau98de12a2018-12-12 07:03:00 +01005825 htx = htx_from_buf(buf);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005826 total += ret;
5827 count -= ret;
5828 if (ret < bsize)
5829 goto done;
5830 }
5831 break;
5832
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005833 case HTX_BLK_TLR:
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005834 case HTX_BLK_EOT:
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005835 /* This is the first trailers block, all the subsequent ones AND
5836 * the EOM will be swallowed by the parser.
5837 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005838 ret = h2s_make_trailers(h2s, htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005839 if (ret > 0) {
5840 total += ret;
5841 count -= ret;
5842 if (ret < bsize)
5843 goto done;
5844 }
5845 break;
5846
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005847 default:
5848 htx_remove_blk(htx, blk);
5849 total += bsize;
5850 count -= bsize;
5851 break;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005852 }
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005853 }
5854
Christopher Faulet9b79a102019-07-15 11:22:56 +02005855 done:
Willy Tarreau2b778482019-05-06 15:00:22 +02005856 if (h2s->st >= H2_SS_HLOC) {
Willy Tarreau00610962018-07-19 10:58:28 +02005857 /* trim any possibly pending data after we close (extra CR-LF,
5858 * unprocessed trailers, abnormal extra data, ...)
5859 */
Willy Tarreau0bad0432018-06-14 16:54:01 +02005860 total += count;
5861 count = 0;
Willy Tarreau00610962018-07-19 10:58:28 +02005862 }
5863
Willy Tarreauc6795ca2017-11-07 09:43:06 +01005864 /* RST are sent similarly to frame acks */
Willy Tarreau02492192017-12-07 15:59:29 +01005865 if (h2s->st == H2_SS_ERROR || h2s->flags & H2_SF_RST_RCVD) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005866 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 Tarreauec988c72018-12-19 18:00:29 +01005867 cs_set_error(cs);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01005868 if (h2s_send_rst_stream(h2s->h2c, h2s) > 0)
Willy Tarreau00dd0782018-03-01 16:31:34 +01005869 h2s_close(h2s);
Willy Tarreauc6795ca2017-11-07 09:43:06 +01005870 }
5871
Christopher Faulet9b79a102019-07-15 11:22:56 +02005872 htx_to_buf(htx, buf);
Olivier Houchardd846c262018-10-19 17:24:29 +02005873
5874 /* The mux is full, cancel the pending tasks */
5875 if ((h2s->h2c->flags & H2_CF_MUX_BLOCK_ANY) ||
Willy Tarreau7838a792019-08-12 18:42:03 +02005876 (h2s->flags & H2_SF_BLK_MBUSY)) {
5877 TRACE_DEVEL("mux full, stopping senders", H2_EV_H2S_SEND|H2_EV_H2C_BLK|H2_EV_H2S_BLK, h2s->h2c->conn, h2s);
Olivier Houchardd846c262018-10-19 17:24:29 +02005878 h2_stop_senders(h2s->h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02005879 }
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005880
Olivier Houchard7505f942018-08-21 18:10:44 +02005881 if (total > 0) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005882 if (!(h2s->h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau7838a792019-08-12 18:42:03 +02005883 TRACE_DEVEL("data queued, waking up h2c sender", H2_EV_H2S_SEND|H2_EV_H2C_SEND, h2s->h2c->conn, h2s);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02005884 tasklet_wakeup(h2s->h2c->wait_event.tasklet);
Olivier Houchardd846c262018-10-19 17:24:29 +02005885
Olivier Houchard7505f942018-08-21 18:10:44 +02005886 }
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01005887 /* If we're waiting for flow control, and we got a shutr on the
5888 * connection, we will never be unlocked, so add an error on
5889 * the conn_stream.
5890 */
5891 if (conn_xprt_read0_pending(h2s->h2c->conn) &&
5892 !b_data(&h2s->h2c->dbuf) &&
5893 (h2s->flags & (H2_SF_BLK_SFCTL | H2_SF_BLK_MFCTL))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005894 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 Houchard6dea2ee2018-12-19 18:16:17 +01005895 if (cs->flags & CS_FL_EOS)
5896 cs->flags |= CS_FL_ERROR;
5897 else
5898 cs->flags |= CS_FL_ERR_PENDING;
5899 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02005900
5901 if (total > 0 && !(h2s->flags & H2_SF_BLK_SFCTL)) {
5902 /* Ok we managed to send something, leave the send_list if we were still there */
Olivier Houchardd360ac62019-03-22 17:37:16 +01005903 LIST_DEL_INIT(&h2s->list);
5904 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02005905
Willy Tarreau7838a792019-08-12 18:42:03 +02005906 TRACE_LEAVE(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005907 return total;
Willy Tarreau62f52692017-10-08 23:01:42 +02005908}
5909
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005910/* for debugging with CLI's "show fd" command */
Willy Tarreau83061a82018-07-13 11:56:34 +02005911static void h2_show_fd(struct buffer *msg, struct connection *conn)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005912{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01005913 struct h2c *h2c = conn->ctx;
Willy Tarreau987c0632018-12-18 10:32:05 +01005914 struct h2s *h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005915 struct eb32_node *node;
5916 int fctl_cnt = 0;
5917 int send_cnt = 0;
5918 int tree_cnt = 0;
5919 int orph_cnt = 0;
Willy Tarreau60f62682019-05-26 11:32:27 +02005920 struct buffer *hmbuf, *tmbuf;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005921
5922 if (!h2c)
5923 return;
5924
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005925 list_for_each_entry(h2s, &h2c->fctl_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005926 fctl_cnt++;
5927
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005928 list_for_each_entry(h2s, &h2c->send_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005929 send_cnt++;
5930
Willy Tarreau3af37712018-12-18 14:34:41 +01005931 h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005932 node = eb32_first(&h2c->streams_by_id);
5933 while (node) {
5934 h2s = container_of(node, struct h2s, by_id);
5935 tree_cnt++;
5936 if (!h2s->cs)
5937 orph_cnt++;
5938 node = eb32_next(node);
5939 }
5940
Willy Tarreau60f62682019-05-26 11:32:27 +02005941 hmbuf = br_head(h2c->mbuf);
Willy Tarreaubcc45952019-05-26 10:05:50 +02005942 tmbuf = br_tail(h2c->mbuf);
Willy Tarreauab2ec452019-08-30 07:07:08 +02005943 chunk_appendf(msg, " h2c.st0=%s .err=%d .maxid=%d .lastid=%d .flg=0x%04x"
Willy Tarreau987c0632018-12-18 10:32:05 +01005944 " .nbst=%u .nbcs=%u .fctl_cnt=%d .send_cnt=%d .tree_cnt=%d"
Willy Tarreau60f62682019-05-26 11:32:27 +02005945 " .orph_cnt=%d .sub=%d .dsi=%d .dbuf=%u@%p+%u/%u .msi=%d"
5946 " .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]",
Willy Tarreauab2ec452019-08-30 07:07:08 +02005947 h2c_st_to_str(h2c->st0), h2c->errcode, h2c->max_id, h2c->last_sid, h2c->flags,
Willy Tarreau616ac812018-07-24 14:12:42 +02005948 h2c->nb_streams, h2c->nb_cs, fctl_cnt, send_cnt, tree_cnt, orph_cnt,
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005949 h2c->wait_event.events, h2c->dsi,
Willy Tarreau987c0632018-12-18 10:32:05 +01005950 (unsigned int)b_data(&h2c->dbuf), b_orig(&h2c->dbuf),
5951 (unsigned int)b_head_ofs(&h2c->dbuf), (unsigned int)b_size(&h2c->dbuf),
5952 h2c->msi,
Willy Tarreau60f62682019-05-26 11:32:27 +02005953 br_head_idx(h2c->mbuf), br_tail_idx(h2c->mbuf), br_size(h2c->mbuf),
5954 (unsigned int)b_data(hmbuf), b_orig(hmbuf),
5955 (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf),
Willy Tarreaubcc45952019-05-26 10:05:50 +02005956 (unsigned int)b_data(tmbuf), b_orig(tmbuf),
5957 (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf));
Willy Tarreau987c0632018-12-18 10:32:05 +01005958
5959 if (h2s) {
Willy Tarreauab2ec452019-08-30 07:07:08 +02005960 chunk_appendf(msg, " last_h2s=%p .id=%d .st=%s.flg=0x%04x .rxbuf=%u@%p+%u/%u .cs=%p",
5961 h2s, h2s->id, h2s_st_to_str(h2s->st), h2s->flags,
Willy Tarreau987c0632018-12-18 10:32:05 +01005962 (unsigned int)b_data(&h2s->rxbuf), b_orig(&h2s->rxbuf),
5963 (unsigned int)b_head_ofs(&h2s->rxbuf), (unsigned int)b_size(&h2s->rxbuf),
5964 h2s->cs);
5965 if (h2s->cs)
5966 chunk_appendf(msg, " .cs.flg=0x%08x .cs.data=%p",
5967 h2s->cs->flags, h2s->cs->data);
5968 }
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005969}
Willy Tarreau62f52692017-10-08 23:01:42 +02005970
5971/*******************************************************/
5972/* functions below are dedicated to the config parsers */
5973/*******************************************************/
5974
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02005975/* config parser for global "tune.h2.header-table-size" */
5976static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx,
5977 struct proxy *defpx, const char *file, int line,
5978 char **err)
5979{
5980 if (too_many_args(1, args, err, NULL))
5981 return -1;
5982
5983 h2_settings_header_table_size = atoi(args[1]);
5984 if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) {
5985 memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]);
5986 return -1;
5987 }
5988 return 0;
5989}
Willy Tarreau62f52692017-10-08 23:01:42 +02005990
Willy Tarreaue6baec02017-07-27 11:45:11 +02005991/* config parser for global "tune.h2.initial-window-size" */
5992static int h2_parse_initial_window_size(char **args, int section_type, struct proxy *curpx,
5993 struct proxy *defpx, const char *file, int line,
5994 char **err)
5995{
5996 if (too_many_args(1, args, err, NULL))
5997 return -1;
5998
5999 h2_settings_initial_window_size = atoi(args[1]);
6000 if (h2_settings_initial_window_size < 0) {
6001 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6002 return -1;
6003 }
6004 return 0;
6005}
6006
Willy Tarreau5242ef82017-07-27 11:47:28 +02006007/* config parser for global "tune.h2.max-concurrent-streams" */
6008static int h2_parse_max_concurrent_streams(char **args, int section_type, struct proxy *curpx,
6009 struct proxy *defpx, const char *file, int line,
6010 char **err)
6011{
6012 if (too_many_args(1, args, err, NULL))
6013 return -1;
6014
6015 h2_settings_max_concurrent_streams = atoi(args[1]);
Willy Tarreau5a490b62019-01-31 10:39:51 +01006016 if ((int)h2_settings_max_concurrent_streams < 0) {
Willy Tarreau5242ef82017-07-27 11:47:28 +02006017 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6018 return -1;
6019 }
6020 return 0;
6021}
6022
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006023/* config parser for global "tune.h2.max-frame-size" */
6024static int h2_parse_max_frame_size(char **args, int section_type, struct proxy *curpx,
6025 struct proxy *defpx, const char *file, int line,
6026 char **err)
6027{
6028 if (too_many_args(1, args, err, NULL))
6029 return -1;
6030
6031 h2_settings_max_frame_size = atoi(args[1]);
6032 if (h2_settings_max_frame_size < 16384 || h2_settings_max_frame_size > 16777215) {
6033 memprintf(err, "'%s' expects a numeric value between 16384 and 16777215.", args[0]);
6034 return -1;
6035 }
6036 return 0;
6037}
6038
Willy Tarreau62f52692017-10-08 23:01:42 +02006039
6040/****************************************/
6041/* MUX initialization and instanciation */
6042/***************************************/
6043
6044/* The mux operations */
Willy Tarreau680b2bd2018-11-27 07:30:17 +01006045static const struct mux_ops h2_ops = {
Willy Tarreau62f52692017-10-08 23:01:42 +02006046 .init = h2_init,
Olivier Houchard21df6cc2018-09-14 23:21:44 +02006047 .wake = h2_wake,
Willy Tarreau62f52692017-10-08 23:01:42 +02006048 .snd_buf = h2_snd_buf,
Olivier Houchard511efea2018-08-16 15:30:32 +02006049 .rcv_buf = h2_rcv_buf,
Olivier Houchard6ff20392018-07-17 18:46:31 +02006050 .subscribe = h2_subscribe,
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006051 .unsubscribe = h2_unsubscribe,
Willy Tarreau62f52692017-10-08 23:01:42 +02006052 .attach = h2_attach,
Willy Tarreaufafd3982018-11-18 21:29:20 +01006053 .get_first_cs = h2_get_first_cs,
Willy Tarreau62f52692017-10-08 23:01:42 +02006054 .detach = h2_detach,
Olivier Houchard060ed432018-11-06 16:32:42 +01006055 .destroy = h2_destroy,
Olivier Houchardd540b362018-11-05 18:37:53 +01006056 .avail_streams = h2_avail_streams,
Willy Tarreau00f18a32019-01-26 12:19:01 +01006057 .used_streams = h2_used_streams,
Willy Tarreau62f52692017-10-08 23:01:42 +02006058 .shutr = h2_shutr,
6059 .shutw = h2_shutw,
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006060 .show_fd = h2_show_fd,
Christopher Faulet9b79a102019-07-15 11:22:56 +02006061 .flags = MX_FL_CLEAN_ABRT|MX_FL_HTX,
Willy Tarreau62f52692017-10-08 23:01:42 +02006062 .name = "H2",
6063};
6064
Christopher Faulet32f61c02018-04-10 14:33:41 +02006065static struct mux_proto_list mux_proto_h2 =
Christopher Fauletc985f6c2019-07-15 11:42:52 +02006066 { .token = IST("h2"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BOTH, .mux = &h2_ops };
Willy Tarreau62f52692017-10-08 23:01:42 +02006067
Willy Tarreau0108d902018-11-25 19:14:37 +01006068INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2);
6069
Willy Tarreau62f52692017-10-08 23:01:42 +02006070/* config keyword parsers */
6071static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006072 { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size },
Willy Tarreaue6baec02017-07-27 11:45:11 +02006073 { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size },
Willy Tarreau5242ef82017-07-27 11:47:28 +02006074 { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006075 { CFG_GLOBAL, "tune.h2.max-frame-size", h2_parse_max_frame_size },
Willy Tarreau62f52692017-10-08 23:01:42 +02006076 { 0, NULL, NULL }
6077}};
6078
Willy Tarreau0108d902018-11-25 19:14:37 +01006079INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);