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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 Tarreauc61966f2019-10-31 15:10:03 +0100755 if (h2c->st0 >= H2_CS_ERROR)
756 return 0;
757
Willy Tarreau86949782019-01-31 10:42:05 +0100758 /* note: may be negative if a SETTINGS frame changes the limit */
759 ret1 = h2c->streams_limit - h2c->nb_streams;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100760
761 /* we must also consider the limit imposed by stream IDs */
762 ret2 = h2_streams_left(h2c);
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100763 ret1 = MIN(ret1, ret2);
Willy Tarreau86949782019-01-31 10:42:05 +0100764 if (ret1 > 0 && srv && srv->max_reuse >= 0) {
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100765 ret2 = h2c->stream_cnt <= srv->max_reuse ? srv->max_reuse - h2c->stream_cnt + 1: 0;
766 ret1 = MIN(ret1, ret2);
767 }
768 return ret1;
Olivier Houchardd540b362018-11-05 18:37:53 +0100769}
770
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200771
Willy Tarreau62f52692017-10-08 23:01:42 +0200772/*****************************************************************/
773/* functions below are dedicated to the mux setup and management */
774/*****************************************************************/
775
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200776/* Initialize the mux once it's attached. For outgoing connections, the context
777 * is already initialized before installing the mux, so we detect incoming
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200778 * connections from the fact that the context is still NULL (even during mux
779 * upgrades). <input> is always used as Input buffer and may contain data. It is
780 * the caller responsibility to not reuse it anymore. Returns < 0 on error.
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200781 */
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200782static int h2_init(struct connection *conn, struct proxy *prx, struct session *sess,
783 struct buffer *input)
Willy Tarreau32218eb2017-09-22 08:07:25 +0200784{
785 struct h2c *h2c;
Willy Tarreauea392822017-10-31 10:02:25 +0100786 struct task *t = NULL;
Christopher Fauletf81ef032019-10-04 15:19:43 +0200787 void *conn_ctx = conn->ctx;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200788
Christopher Fauletf81ef032019-10-04 15:19:43 +0200789 TRACE_ENTER(H2_EV_H2C_NEW);
Willy Tarreau7838a792019-08-12 18:42:03 +0200790
Willy Tarreaubafbe012017-11-24 17:34:44 +0100791 h2c = pool_alloc(pool_head_h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200792 if (!h2c)
mildiscd2d7de2018-10-02 16:44:18 +0200793 goto fail_no_h2c;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200794
Christopher Faulete9b70722019-04-08 10:46:02 +0200795 if (conn_is_back(conn)) {
Willy Tarreau01b44822018-10-03 14:26:37 +0200796 h2c->flags = H2_CF_IS_BACK;
797 h2c->shut_timeout = h2c->timeout = prx->timeout.server;
798 if (tick_isset(prx->timeout.serverfin))
799 h2c->shut_timeout = prx->timeout.serverfin;
800 } else {
801 h2c->flags = H2_CF_NONE;
802 h2c->shut_timeout = h2c->timeout = prx->timeout.client;
803 if (tick_isset(prx->timeout.clientfin))
804 h2c->shut_timeout = prx->timeout.clientfin;
805 }
Willy Tarreau3f133572017-10-31 19:21:06 +0100806
Willy Tarreau0b37d652018-10-03 10:33:02 +0200807 h2c->proxy = prx;
Willy Tarreau33400292017-11-05 11:23:40 +0100808 h2c->task = NULL;
Willy Tarreau3f133572017-10-31 19:21:06 +0100809 if (tick_isset(h2c->timeout)) {
810 t = task_new(tid_bit);
811 if (!t)
812 goto fail;
813
814 h2c->task = t;
815 t->process = h2_timeout_task;
816 t->context = h2c;
817 t->expire = tick_add(now_ms, h2c->timeout);
818 }
Willy Tarreauea392822017-10-31 10:02:25 +0100819
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200820 h2c->wait_event.tasklet = tasklet_new();
821 if (!h2c->wait_event.tasklet)
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200822 goto fail;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200823 h2c->wait_event.tasklet->process = h2_io_cb;
824 h2c->wait_event.tasklet->context = h2c;
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100825 h2c->wait_event.events = 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200826
Willy Tarreau32218eb2017-09-22 08:07:25 +0200827 h2c->ddht = hpack_dht_alloc(h2_settings_header_table_size);
828 if (!h2c->ddht)
829 goto fail;
830
831 /* Initialise the context. */
832 h2c->st0 = H2_CS_PREFACE;
833 h2c->conn = conn;
Willy Tarreau2e2083a2019-01-31 10:34:07 +0100834 h2c->streams_limit = h2_settings_max_concurrent_streams;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200835 h2c->max_id = -1;
836 h2c->errcode = H2_ERR_NO_ERROR;
Willy Tarreau97aaa672018-12-23 09:49:04 +0100837 h2c->rcvd_c = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200838 h2c->rcvd_s = 0;
Willy Tarreau49745612017-12-03 18:56:02 +0100839 h2c->nb_streams = 0;
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200840 h2c->nb_cs = 0;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100841 h2c->nb_reserved = 0;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100842 h2c->stream_cnt = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200843
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200844 h2c->dbuf = *input;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200845 h2c->dsi = -1;
846 h2c->msi = -1;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100847
Willy Tarreau32218eb2017-09-22 08:07:25 +0200848 h2c->last_sid = -1;
849
Willy Tarreau51330962019-05-26 09:38:07 +0200850 br_init(h2c->mbuf, sizeof(h2c->mbuf) / sizeof(h2c->mbuf[0]));
Willy Tarreau32218eb2017-09-22 08:07:25 +0200851 h2c->miw = 65535; /* mux initial window size */
852 h2c->mws = 65535; /* mux window size */
853 h2c->mfs = 16384; /* initial max frame size */
Willy Tarreau751f2d02018-10-05 09:35:00 +0200854 h2c->streams_by_id = EB_ROOT;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200855 LIST_INIT(&h2c->send_list);
856 LIST_INIT(&h2c->fctl_list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200857 LIST_INIT(&h2c->blocked_list);
Olivier Houchardd846c262018-10-19 17:24:29 +0200858 LIST_INIT(&h2c->sending_list);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100859 LIST_INIT(&h2c->buf_wait.list);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200860
Christopher Fauletf81ef032019-10-04 15:19:43 +0200861 conn->ctx = h2c;
862
Willy Tarreau3f133572017-10-31 19:21:06 +0100863 if (t)
864 task_queue(t);
Willy Tarreauea392822017-10-31 10:02:25 +0100865
Willy Tarreau01b44822018-10-03 14:26:37 +0200866 if (h2c->flags & H2_CF_IS_BACK) {
867 /* FIXME: this is temporary, for outgoing connections we need
868 * to immediately allocate a stream until the code is modified
869 * so that the caller calls ->attach(). For now the outgoing cs
Christopher Fauletf81ef032019-10-04 15:19:43 +0200870 * is stored as conn->ctx by the caller and saved in conn_ctx.
Willy Tarreau01b44822018-10-03 14:26:37 +0200871 */
872 struct h2s *h2s;
873
Christopher Fauletf81ef032019-10-04 15:19:43 +0200874 h2s = h2c_bck_stream_new(h2c, conn_ctx, sess);
Willy Tarreau01b44822018-10-03 14:26:37 +0200875 if (!h2s)
876 goto fail_stream;
877 }
878
Willy Tarreau0f383582018-10-03 14:22:21 +0200879 /* prepare to read something */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200880 h2c_restart_reading(h2c, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +0200881 TRACE_LEAVE(H2_EV_H2C_NEW, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200882 return 0;
Willy Tarreau01b44822018-10-03 14:26:37 +0200883 fail_stream:
884 hpack_dht_free(h2c->ddht);
mildiscd2d7de2018-10-02 16:44:18 +0200885 fail:
Willy Tarreauf6562792019-05-07 19:05:35 +0200886 task_destroy(t);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200887 if (h2c->wait_event.tasklet)
888 tasklet_free(h2c->wait_event.tasklet);
Willy Tarreaubafbe012017-11-24 17:34:44 +0100889 pool_free(pool_head_h2c, h2c);
mildiscd2d7de2018-10-02 16:44:18 +0200890 fail_no_h2c:
Christopher Fauletf81ef032019-10-04 15:19:43 +0200891 conn->ctx = conn_ctx; /* restore saved ctx */
892 TRACE_DEVEL("leaving in error", H2_EV_H2C_NEW|H2_EV_H2C_END|H2_EV_H2C_ERR);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200893 return -1;
894}
895
Willy Tarreau751f2d02018-10-05 09:35:00 +0200896/* returns the next allocatable outgoing stream ID for the H2 connection, or
897 * -1 if no more is allocatable.
898 */
899static inline int32_t h2c_get_next_sid(const struct h2c *h2c)
900{
901 int32_t id = (h2c->max_id + 1) | 1;
Willy Tarreaua80dca82019-01-24 17:08:28 +0100902
903 if ((id & 0x80000000U) || (h2c->last_sid >= 0 && id > h2c->last_sid))
Willy Tarreau751f2d02018-10-05 09:35:00 +0200904 id = -1;
905 return id;
906}
907
Willy Tarreau2373acc2017-10-12 17:35:14 +0200908/* returns the stream associated with id <id> or NULL if not found */
909static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id)
910{
911 struct eb32_node *node;
912
Willy Tarreau751f2d02018-10-05 09:35:00 +0200913 if (id == 0)
914 return (struct h2s *)h2_closed_stream;
915
Willy Tarreau2a856182017-05-16 15:20:39 +0200916 if (id > h2c->max_id)
917 return (struct h2s *)h2_idle_stream;
918
Willy Tarreau2373acc2017-10-12 17:35:14 +0200919 node = eb32_lookup(&h2c->streams_by_id, id);
920 if (!node)
Willy Tarreau2a856182017-05-16 15:20:39 +0200921 return (struct h2s *)h2_closed_stream;
Willy Tarreau2373acc2017-10-12 17:35:14 +0200922
923 return container_of(node, struct h2s, by_id);
924}
925
Christopher Faulet73c12072019-04-08 11:23:22 +0200926/* release function. This one should be called to free all resources allocated
927 * to the mux.
Willy Tarreau62f52692017-10-08 23:01:42 +0200928 */
Christopher Faulet73c12072019-04-08 11:23:22 +0200929static void h2_release(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +0200930{
Christopher Faulet61840e72019-04-15 09:33:32 +0200931 struct connection *conn = NULL;;
Christopher Faulet39a96ee2019-04-08 10:52:21 +0200932
Willy Tarreau7838a792019-08-12 18:42:03 +0200933 TRACE_ENTER(H2_EV_H2C_END);
934
Willy Tarreau32218eb2017-09-22 08:07:25 +0200935 if (h2c) {
Christopher Faulet61840e72019-04-15 09:33:32 +0200936 /* The connection must be aattached to this mux to be released */
937 if (h2c->conn && h2c->conn->ctx == h2c)
938 conn = h2c->conn;
939
Willy Tarreau7838a792019-08-12 18:42:03 +0200940 TRACE_DEVEL("freeing h2c", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200941 hpack_dht_free(h2c->ddht);
Willy Tarreau14398122017-09-22 14:26:04 +0200942
Willy Tarreau186e96e2019-05-28 17:21:18 +0200943 if (LIST_ADDED(&h2c->buf_wait.list)) {
944 HA_SPIN_LOCK(BUF_WQ_LOCK, &buffer_wq_lock);
945 LIST_DEL(&h2c->buf_wait.list);
946 HA_SPIN_UNLOCK(BUF_WQ_LOCK, &buffer_wq_lock);
947 }
Willy Tarreau14398122017-09-22 14:26:04 +0200948
Willy Tarreau44e973f2018-03-01 17:49:30 +0100949 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200950 h2_release_mbuf(h2c);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100951
Willy Tarreauea392822017-10-31 10:02:25 +0100952 if (h2c->task) {
Willy Tarreau0975f112018-03-29 15:22:59 +0200953 h2c->task->context = NULL;
954 task_wakeup(h2c->task, TASK_WOKEN_OTHER);
Willy Tarreauea392822017-10-31 10:02:25 +0100955 h2c->task = NULL;
956 }
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200957 if (h2c->wait_event.tasklet)
958 tasklet_free(h2c->wait_event.tasklet);
Christopher Faulet21d849f2019-09-18 11:07:20 +0200959 if (conn && h2c->wait_event.events != 0)
Olivier Houcharde179d0e2019-03-21 18:27:17 +0100960 conn->xprt->unsubscribe(conn, conn->xprt_ctx, h2c->wait_event.events,
Christopher Faulet21d849f2019-09-18 11:07:20 +0200961 &h2c->wait_event);
Willy Tarreauea392822017-10-31 10:02:25 +0100962
Willy Tarreaubafbe012017-11-24 17:34:44 +0100963 pool_free(pool_head_h2c, h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200964 }
965
Christopher Faulet39a96ee2019-04-08 10:52:21 +0200966 if (conn) {
967 conn->mux = NULL;
968 conn->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +0200969 TRACE_DEVEL("freeing conn", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200970
Christopher Faulet39a96ee2019-04-08 10:52:21 +0200971 conn_stop_tracking(conn);
972 conn_full_close(conn);
973 if (conn->destroy_cb)
974 conn->destroy_cb(conn);
975 conn_free(conn);
976 }
Willy Tarreau7838a792019-08-12 18:42:03 +0200977
978 TRACE_LEAVE(H2_EV_H2C_END);
Willy Tarreau62f52692017-10-08 23:01:42 +0200979}
980
981
Willy Tarreau71681172017-10-23 14:39:06 +0200982/******************************************************/
983/* functions below are for the H2 protocol processing */
984/******************************************************/
985
986/* returns the stream if of stream <h2s> or 0 if <h2s> is NULL */
Willy Tarreau1f094672017-11-20 21:27:45 +0100987static inline __maybe_unused int h2s_id(const struct h2s *h2s)
Willy Tarreau71681172017-10-23 14:39:06 +0200988{
989 return h2s ? h2s->id : 0;
990}
991
Willy Tarreau1d4a0f82019-08-02 07:52:08 +0200992/* returns the sum of the stream's own window size and the mux's initial
993 * window, which together form the stream's effective window size.
994 */
995static inline int h2s_mws(const struct h2s *h2s)
996{
997 return h2s->sws + h2s->h2c->miw;
998}
999
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001000/* returns true of the mux is currently busy as seen from stream <h2s> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001001static inline __maybe_unused int h2c_mux_busy(const struct h2c *h2c, const struct h2s *h2s)
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001002{
1003 if (h2c->msi < 0)
1004 return 0;
1005
1006 if (h2c->msi == h2s_id(h2s))
1007 return 0;
1008
1009 return 1;
1010}
1011
Willy Tarreau741d6df2017-10-17 08:00:59 +02001012/* marks an error on the connection */
Willy Tarreau1f094672017-11-20 21:27:45 +01001013static inline __maybe_unused void h2c_error(struct h2c *h2c, enum h2_err err)
Willy Tarreau741d6df2017-10-17 08:00:59 +02001014{
Willy Tarreau7838a792019-08-12 18:42:03 +02001015 TRACE_POINT(H2_EV_H2C_ERR, h2c->conn,,, (void *)(long)(err));
Willy Tarreau741d6df2017-10-17 08:00:59 +02001016 h2c->errcode = err;
1017 h2c->st0 = H2_CS_ERROR;
1018}
1019
Willy Tarreau175cebb2019-01-24 10:02:24 +01001020/* marks an error on the stream. It may also update an already closed stream
1021 * (e.g. to report an error after an RST was received).
1022 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001023static inline __maybe_unused void h2s_error(struct h2s *h2s, enum h2_err err)
Willy Tarreau2e43f082017-10-17 08:03:59 +02001024{
Willy Tarreau175cebb2019-01-24 10:02:24 +01001025 if (h2s->id && h2s->st != H2_SS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001026 TRACE_POINT(H2_EV_H2S_ERR, h2s->h2c->conn, h2s,, (void *)(long)(err));
Willy Tarreau2e43f082017-10-17 08:03:59 +02001027 h2s->errcode = err;
Willy Tarreau175cebb2019-01-24 10:02:24 +01001028 if (h2s->st < H2_SS_ERROR)
1029 h2s->st = H2_SS_ERROR;
Willy Tarreauec988c72018-12-19 18:00:29 +01001030 if (h2s->cs)
1031 cs_set_error(h2s->cs);
Willy Tarreau2e43f082017-10-17 08:03:59 +02001032 }
1033}
1034
Willy Tarreau7e094452018-12-19 18:08:52 +01001035/* attempt to notify the data layer of recv availability */
1036static void __maybe_unused h2s_notify_recv(struct h2s *h2s)
1037{
1038 struct wait_event *sw;
1039
1040 if (h2s->recv_wait) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001041 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau7e094452018-12-19 18:08:52 +01001042 sw = h2s->recv_wait;
1043 sw->events &= ~SUB_RETRY_RECV;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001044 tasklet_wakeup(sw->tasklet);
Willy Tarreau7e094452018-12-19 18:08:52 +01001045 h2s->recv_wait = NULL;
1046 }
1047}
1048
1049/* attempt to notify the data layer of send availability */
1050static void __maybe_unused h2s_notify_send(struct h2s *h2s)
1051{
1052 struct wait_event *sw;
1053
Willy Tarreauc234ae32019-05-13 17:56:11 +02001054 if (h2s->send_wait && !LIST_ADDED(&h2s->sending_list)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001055 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau7e094452018-12-19 18:08:52 +01001056 sw = h2s->send_wait;
1057 sw->events &= ~SUB_RETRY_SEND;
Olivier Houchardfd1e96d2019-03-25 14:04:25 +01001058 LIST_ADDQ(&h2s->h2c->sending_list, &h2s->sending_list);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001059 tasklet_wakeup(sw->tasklet);
Willy Tarreau7e094452018-12-19 18:08:52 +01001060 }
1061}
1062
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001063/* alerts the data layer, trying to wake it up by all means, following
1064 * this sequence :
1065 * - if the h2s' data layer is subscribed to recv, then it's woken up for recv
1066 * - if its subscribed to send, then it's woken up for send
1067 * - if it was subscribed to neither, its ->wake() callback is called
1068 * It is safe to call this function with a closed stream which doesn't have a
1069 * conn_stream anymore.
1070 */
1071static void __maybe_unused h2s_alert(struct h2s *h2s)
1072{
Willy Tarreau7838a792019-08-12 18:42:03 +02001073 TRACE_ENTER(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
1074
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001075 if (h2s->recv_wait || h2s->send_wait) {
1076 h2s_notify_recv(h2s);
1077 h2s_notify_send(h2s);
1078 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001079 else if (h2s->cs && h2s->cs->data_cb->wake != NULL) {
1080 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001081 h2s->cs->data_cb->wake(h2s->cs);
Willy Tarreau7838a792019-08-12 18:42:03 +02001082 }
1083
1084 TRACE_LEAVE(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001085}
1086
Willy Tarreaue4820742017-07-27 13:37:23 +02001087/* writes the 24-bit frame size <len> at address <frame> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001088static inline __maybe_unused void h2_set_frame_size(void *frame, uint32_t len)
Willy Tarreaue4820742017-07-27 13:37:23 +02001089{
1090 uint8_t *out = frame;
1091
1092 *out = len >> 16;
1093 write_n16(out + 1, len);
1094}
1095
Willy Tarreau54c15062017-10-10 17:10:03 +02001096/* reads <bytes> bytes from buffer <b> starting at relative offset <o> from the
1097 * current pointer, dealing with wrapping, and stores the result in <dst>. It's
1098 * the caller's responsibility to verify that there are at least <bytes> bytes
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001099 * available in the buffer's input prior to calling this function. The buffer
1100 * is assumed not to hold any output data.
Willy Tarreau54c15062017-10-10 17:10:03 +02001101 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001102static inline __maybe_unused void h2_get_buf_bytes(void *dst, size_t bytes,
Willy Tarreau54c15062017-10-10 17:10:03 +02001103 const struct buffer *b, int o)
1104{
Willy Tarreau591d4452018-06-15 17:21:00 +02001105 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 +02001106}
1107
Willy Tarreau1f094672017-11-20 21:27:45 +01001108static inline __maybe_unused uint16_t h2_get_n16(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001109{
Willy Tarreau591d4452018-06-15 17:21:00 +02001110 return readv_n16(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001111}
1112
Willy Tarreau1f094672017-11-20 21:27:45 +01001113static inline __maybe_unused uint32_t h2_get_n32(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001114{
Willy Tarreau591d4452018-06-15 17:21:00 +02001115 return readv_n32(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001116}
1117
Willy Tarreau1f094672017-11-20 21:27:45 +01001118static inline __maybe_unused uint64_t h2_get_n64(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001119{
Willy Tarreau591d4452018-06-15 17:21:00 +02001120 return readv_n64(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001121}
1122
1123
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001124/* Peeks an H2 frame header from offset <o> of buffer <b> into descriptor <h>.
1125 * The algorithm is not obvious. It turns out that H2 headers are neither
1126 * aligned nor do they use regular sizes. And to add to the trouble, the buffer
1127 * may wrap so each byte read must be checked. The header is formed like this :
Willy Tarreau715d5312017-07-11 15:20:24 +02001128 *
1129 * b0 b1 b2 b3 b4 b5..b8
1130 * +----------+---------+--------+----+----+----------------------+
1131 * |len[23:16]|len[15:8]|len[7:0]|type|flag|sid[31:0] (big endian)|
1132 * +----------+---------+--------+----+----+----------------------+
1133 *
1134 * Here we read a big-endian 64 bit word from h[1]. This way in a single read
1135 * we get the sid properly aligned and ordered, and 16 bits of len properly
1136 * ordered as well. The type and flags can be extracted using bit shifts from
1137 * the word, and only one extra read is needed to fetch len[16:23].
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001138 * Returns zero if some bytes are missing, otherwise non-zero on success. The
1139 * buffer is assumed not to contain any output data.
Willy Tarreau715d5312017-07-11 15:20:24 +02001140 */
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001141static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, int o, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001142{
1143 uint64_t w;
1144
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001145 if (b_data(b) < o + 9)
Willy Tarreau715d5312017-07-11 15:20:24 +02001146 return 0;
1147
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001148 w = h2_get_n64(b, o + 1);
1149 h->len = *(uint8_t*)b_peek(b, o) << 16;
Willy Tarreau715d5312017-07-11 15:20:24 +02001150 h->sid = w & 0x7FFFFFFF; /* RFC7540#4.1: R bit must be ignored */
1151 h->ff = w >> 32;
1152 h->ft = w >> 40;
1153 h->len += w >> 48;
1154 return 1;
1155}
1156
1157/* skip the next 9 bytes corresponding to the frame header possibly parsed by
1158 * h2_peek_frame_hdr() above.
1159 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001160static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b)
Willy Tarreau715d5312017-07-11 15:20:24 +02001161{
Willy Tarreaue5f12ce2018-06-15 10:28:05 +02001162 b_del(b, 9);
Willy Tarreau715d5312017-07-11 15:20:24 +02001163}
1164
1165/* same as above, automatically advances the buffer on success */
Willy Tarreau1f094672017-11-20 21:27:45 +01001166static inline __maybe_unused int h2_get_frame_hdr(struct buffer *b, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001167{
1168 int ret;
1169
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001170 ret = h2_peek_frame_hdr(b, 0, h);
Willy Tarreau715d5312017-07-11 15:20:24 +02001171 if (ret > 0)
1172 h2_skip_frame_hdr(b);
1173 return ret;
1174}
1175
Willy Tarreaucb985a42019-10-07 16:56:34 +02001176
1177/* try to fragment the headers frame present at the beginning of buffer <b>,
1178 * enforcing a limit of <mfs> bytes per frame. Returns 0 on failure, 1 on
1179 * success. Typical causes of failure include a buffer not large enough to
1180 * add extra frame headers. The existing frame size is read in the current
1181 * frame. Its EH flag will be cleared if CONTINUATION frames need to be added,
1182 * and its length will be adjusted. The stream ID for continuation frames will
1183 * be copied from the initial frame's.
1184 */
1185static int h2_fragment_headers(struct buffer *b, uint32_t mfs)
1186{
1187 size_t remain = b->data - 9;
1188 int extra_frames = (remain - 1) / mfs;
1189 size_t fsize;
1190 char *fptr;
1191 int frame;
1192
1193 if (b->data <= mfs + 9)
1194 return 1;
1195
1196 /* Too large a frame, we need to fragment it using CONTINUATION
1197 * frames. We start from the end and move tails as needed.
1198 */
1199 if (b->data + extra_frames * 9 > b->size)
1200 return 0;
1201
1202 for (frame = extra_frames; frame; frame--) {
1203 fsize = ((remain - 1) % mfs) + 1;
1204 remain -= fsize;
1205
1206 /* move data */
1207 fptr = b->area + 9 + remain + (frame - 1) * 9;
1208 memmove(fptr + 9, b->area + 9 + remain, fsize);
1209 b->data += 9;
1210
1211 /* write new frame header */
1212 h2_set_frame_size(fptr, fsize);
1213 fptr[3] = H2_FT_CONTINUATION;
1214 fptr[4] = (frame == extra_frames) ? H2_F_HEADERS_END_HEADERS : 0;
1215 write_n32(fptr + 5, read_n32(b->area + 5));
1216 }
1217
1218 b->area[4] &= ~H2_F_HEADERS_END_HEADERS;
1219 h2_set_frame_size(b->area, remain);
1220 return 1;
1221}
1222
1223
Willy Tarreau00dd0782018-03-01 16:31:34 +01001224/* marks stream <h2s> as CLOSED and decrement the number of active streams for
1225 * its connection if the stream was not yet closed. Please use this exclusively
1226 * before closing a stream to ensure stream count is well maintained.
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001227 */
Willy Tarreau00dd0782018-03-01 16:31:34 +01001228static inline void h2s_close(struct h2s *h2s)
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001229{
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001230 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001231 TRACE_ENTER(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001232 h2s->h2c->nb_streams--;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001233 if (!h2s->id)
1234 h2s->h2c->nb_reserved--;
Willy Tarreaua27db382019-03-25 18:13:16 +01001235 if (h2s->cs) {
Willy Tarreaua27db382019-03-25 18:13:16 +01001236 if (!(h2s->cs->flags & CS_FL_EOS) && !b_data(&h2s->rxbuf))
1237 h2s_notify_recv(h2s);
1238 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001239 TRACE_LEAVE(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001240 }
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001241 h2s->st = H2_SS_CLOSED;
1242}
1243
Willy Tarreau71049cc2018-03-28 13:56:39 +02001244/* detaches an H2 stream from its H2C and releases it to the H2S pool. */
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001245/* h2s_destroy should only ever be called by the thread that owns the stream,
1246 * that means that a tasklet should be used if we want to destroy the h2s
1247 * from another thread
1248 */
Willy Tarreau71049cc2018-03-28 13:56:39 +02001249static void h2s_destroy(struct h2s *h2s)
Willy Tarreau0a10de62018-03-01 16:27:53 +01001250{
Willy Tarreau7838a792019-08-12 18:42:03 +02001251 struct connection *conn = h2s->h2c->conn;
1252
1253 TRACE_ENTER(H2_EV_H2S_END, conn, h2s);
1254
Willy Tarreau0a10de62018-03-01 16:27:53 +01001255 h2s_close(h2s);
1256 eb32_delete(&h2s->by_id);
Olivier Houchard638b7992018-08-16 15:41:52 +02001257 if (b_size(&h2s->rxbuf)) {
1258 b_free(&h2s->rxbuf);
1259 offer_buffers(NULL, tasks_run_queue);
1260 }
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001261 if (h2s->send_wait != NULL)
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001262 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001263 if (h2s->recv_wait != NULL)
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001264 h2s->recv_wait->events &= ~SUB_RETRY_RECV;
Joseph Herlantd77575d2018-11-25 10:54:45 -08001265 /* There's no need to explicitly call unsubscribe here, the only
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001266 * reference left would be in the h2c send_list/fctl_list, and if
1267 * we're in it, we're getting out anyway
1268 */
Olivier Houchardd360ac62019-03-22 17:37:16 +01001269 LIST_DEL_INIT(&h2s->list);
Willy Tarreauc234ae32019-05-13 17:56:11 +02001270 if (LIST_ADDED(&h2s->sending_list)) {
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001271 /* It should be OK to call tasklet_remove_from_tasklet_list()
1272 * here, as only the thread responsible for the tasklet should
1273 * be called here.
1274 */
Willy Tarreau86eded62019-06-14 14:47:49 +02001275 tasklet_remove_from_tasklet_list(h2s->send_wait->tasklet);
Olivier Houchard998410a2019-04-15 19:23:37 +02001276 LIST_DEL_INIT(&h2s->sending_list);
1277 }
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001278 /* ditto, calling tasklet_free() here should be ok */
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001279 tasklet_free(h2s->wait_event.tasklet);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001280 pool_free(pool_head_h2s, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001281
1282 TRACE_LEAVE(H2_EV_H2S_END, conn);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001283}
1284
Willy Tarreaua8e49542018-10-03 18:53:55 +02001285/* allocates a new stream <id> for connection <h2c> and adds it into h2c's
1286 * stream tree. In case of error, nothing is added and NULL is returned. The
1287 * causes of errors can be any failed memory allocation. The caller is
1288 * responsible for checking if the connection may support an extra stream
1289 * prior to calling this function.
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001290 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02001291static struct h2s *h2s_new(struct h2c *h2c, int id)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001292{
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001293 struct h2s *h2s;
1294
Willy Tarreau7838a792019-08-12 18:42:03 +02001295 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1296
Willy Tarreaubafbe012017-11-24 17:34:44 +01001297 h2s = pool_alloc(pool_head_h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001298 if (!h2s)
1299 goto out;
1300
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001301 h2s->wait_event.tasklet = tasklet_new();
1302 if (!h2s->wait_event.tasklet) {
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001303 pool_free(pool_head_h2s, h2s);
1304 goto out;
1305 }
1306 h2s->send_wait = NULL;
1307 h2s->recv_wait = NULL;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001308 h2s->wait_event.tasklet->process = h2_deferred_shut;
1309 h2s->wait_event.tasklet->context = h2s;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001310 h2s->wait_event.events = 0;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001311 LIST_INIT(&h2s->list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01001312 LIST_INIT(&h2s->sending_list);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001313 h2s->h2c = h2c;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001314 h2s->cs = NULL;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001315 h2s->sws = 0;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001316 h2s->flags = H2_SF_NONE;
1317 h2s->errcode = H2_ERR_NO_ERROR;
1318 h2s->st = H2_SS_IDLE;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02001319 h2s->status = 0;
Willy Tarreau1915ca22019-01-24 11:49:37 +01001320 h2s->body_len = 0;
Olivier Houchard638b7992018-08-16 15:41:52 +02001321 h2s->rxbuf = BUF_NULL;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001322
1323 if (h2c->flags & H2_CF_IS_BACK) {
1324 h1m_init_req(&h2s->h1m);
1325 h2s->h1m.err_pos = -1; // don't care about errors on the request path
1326 h2s->h1m.flags |= H1_MF_TOLOWER;
1327 } else {
1328 h1m_init_res(&h2s->h1m);
1329 h2s->h1m.err_pos = -1; // don't care about errors on the response path
1330 h2s->h1m.flags |= H1_MF_TOLOWER;
1331 }
1332
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001333 h2s->by_id.key = h2s->id = id;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001334 if (id > 0)
1335 h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001336 else
1337 h2c->nb_reserved++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001338
1339 eb32_insert(&h2c->streams_by_id, &h2s->by_id);
Willy Tarreau49745612017-12-03 18:56:02 +01001340 h2c->nb_streams++;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001341 h2c->stream_cnt++;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001342
Willy Tarreau7838a792019-08-12 18:42:03 +02001343 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001344 return h2s;
1345
1346 out_free_h2s:
1347 pool_free(pool_head_h2s, h2s);
1348 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001349 TRACE_DEVEL("leaving in error", H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001350 return NULL;
1351}
1352
1353/* creates a new stream <id> on the h2c connection and returns it, or NULL in
1354 * case of memory allocation error.
1355 */
1356static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id)
1357{
1358 struct session *sess = h2c->conn->owner;
1359 struct conn_stream *cs;
1360 struct h2s *h2s;
1361
Willy Tarreau7838a792019-08-12 18:42:03 +02001362 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1363
Willy Tarreaua8e49542018-10-03 18:53:55 +02001364 if (h2c->nb_streams >= h2_settings_max_concurrent_streams)
1365 goto out;
1366
1367 h2s = h2s_new(h2c, id);
1368 if (!h2s)
1369 goto out;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001370
1371 cs = cs_new(h2c->conn);
1372 if (!cs)
1373 goto out_close;
1374
Olivier Houchard746fb772018-12-15 19:42:00 +01001375 cs->flags |= CS_FL_NOT_FIRST;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001376 h2s->cs = cs;
1377 cs->ctx = h2s;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001378 h2c->nb_cs++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001379
1380 if (stream_create_from_cs(cs) < 0)
1381 goto out_free_cs;
1382
Willy Tarreau590a0512018-09-05 11:56:48 +02001383 /* We want the accept date presented to the next stream to be the one
1384 * we have now, the handshake time to be null (since the next stream
1385 * is not delayed by a handshake), and the idle time to count since
1386 * right now.
1387 */
1388 sess->accept_date = date;
1389 sess->tv_accept = now;
1390 sess->t_handshake = 0;
1391
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001392 /* OK done, the stream lives its own life now */
Willy Tarreaufa1d3572019-01-31 10:31:51 +01001393 if (h2_frt_has_too_many_cs(h2c))
Willy Tarreauf2101912018-07-19 10:11:38 +02001394 h2c->flags |= H2_CF_DEM_TOOMANY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001395 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001396 return h2s;
1397
1398 out_free_cs:
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001399 h2c->nb_cs--;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001400 cs_free(cs);
Olivier Houchard58d87f32019-05-29 16:44:17 +02001401 h2s->cs = NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001402 out_close:
Willy Tarreau71049cc2018-03-28 13:56:39 +02001403 h2s_destroy(h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001404 out:
Willy Tarreau45efc072018-10-03 18:27:52 +02001405 sess_log(sess);
Willy Tarreau7838a792019-08-12 18:42:03 +02001406 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreau45efc072018-10-03 18:27:52 +02001407 return NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001408}
1409
Willy Tarreau751f2d02018-10-05 09:35:00 +02001410/* allocates a new stream associated to conn_stream <cs> on the h2c connection
1411 * and returns it, or NULL in case of memory allocation error or if the highest
1412 * possible stream ID was reached.
1413 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01001414static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001415{
1416 struct h2s *h2s = NULL;
1417
Willy Tarreau7838a792019-08-12 18:42:03 +02001418 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1419
Willy Tarreau86949782019-01-31 10:42:05 +01001420 if (h2c->nb_streams >= h2c->streams_limit)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001421 goto out;
1422
Willy Tarreaua80dca82019-01-24 17:08:28 +01001423 if (h2_streams_left(h2c) < 1)
1424 goto out;
1425
Willy Tarreau751f2d02018-10-05 09:35:00 +02001426 /* Defer choosing the ID until we send the first message to create the stream */
1427 h2s = h2s_new(h2c, 0);
1428 if (!h2s)
1429 goto out;
1430
1431 h2s->cs = cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001432 h2s->sess = sess;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001433 cs->ctx = h2s;
1434 h2c->nb_cs++;
1435
Willy Tarreau751f2d02018-10-05 09:35:00 +02001436 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001437 if (likely(h2s))
1438 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
1439 else
1440 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn, h2s);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001441 return h2s;
1442}
1443
Willy Tarreaube5b7152017-09-25 16:25:39 +02001444/* try to send a settings frame on the connection. Returns > 0 on success, 0 if
1445 * it couldn't do anything. It may return an error in h2c. See RFC7540#11.3 for
1446 * the various settings codes.
1447 */
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001448static int h2c_send_settings(struct h2c *h2c)
Willy Tarreaube5b7152017-09-25 16:25:39 +02001449{
1450 struct buffer *res;
1451 char buf_data[100]; // enough for 15 settings
Willy Tarreau83061a82018-07-13 11:56:34 +02001452 struct buffer buf;
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001453 int mfs;
Willy Tarreau7838a792019-08-12 18:42:03 +02001454 int ret = 0;
1455
1456 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001457
1458 if (h2c_mux_busy(h2c, NULL)) {
1459 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001460 goto out;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001461 }
1462
Willy Tarreaube5b7152017-09-25 16:25:39 +02001463 chunk_init(&buf, buf_data, sizeof(buf_data));
1464 chunk_memcpy(&buf,
1465 "\x00\x00\x00" /* length : 0 for now */
1466 "\x04\x00" /* type : 4 (settings), flags : 0 */
1467 "\x00\x00\x00\x00", /* stream ID : 0 */
1468 9);
1469
Willy Tarreau0bbad6b2019-02-26 16:01:52 +01001470 if (h2c->flags & H2_CF_IS_BACK) {
1471 /* send settings_enable_push=0 */
1472 chunk_memcat(&buf, "\x00\x02\x00\x00\x00\x00", 6);
1473 }
1474
Willy Tarreaube5b7152017-09-25 16:25:39 +02001475 if (h2_settings_header_table_size != 4096) {
1476 char str[6] = "\x00\x01"; /* header_table_size */
1477
1478 write_n32(str + 2, h2_settings_header_table_size);
1479 chunk_memcat(&buf, str, 6);
1480 }
1481
1482 if (h2_settings_initial_window_size != 65535) {
1483 char str[6] = "\x00\x04"; /* initial_window_size */
1484
1485 write_n32(str + 2, h2_settings_initial_window_size);
1486 chunk_memcat(&buf, str, 6);
1487 }
1488
1489 if (h2_settings_max_concurrent_streams != 0) {
1490 char str[6] = "\x00\x03"; /* max_concurrent_streams */
1491
1492 /* Note: 0 means "unlimited" for haproxy's config but not for
1493 * the protocol, so never send this value!
1494 */
1495 write_n32(str + 2, h2_settings_max_concurrent_streams);
1496 chunk_memcat(&buf, str, 6);
1497 }
1498
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001499 mfs = h2_settings_max_frame_size;
1500 if (mfs > global.tune.bufsize)
1501 mfs = global.tune.bufsize;
1502
1503 if (!mfs)
1504 mfs = global.tune.bufsize;
1505
1506 if (mfs != 16384) {
Willy Tarreaube5b7152017-09-25 16:25:39 +02001507 char str[6] = "\x00\x05"; /* max_frame_size */
1508
1509 /* note: similarly we could also emit MAX_HEADER_LIST_SIZE to
1510 * match bufsize - rewrite size, but at the moment it seems
1511 * that clients don't take care of it.
1512 */
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001513 write_n32(str + 2, mfs);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001514 chunk_memcat(&buf, str, 6);
1515 }
1516
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001517 h2_set_frame_size(buf.area, buf.data - 9);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001518
1519 res = br_tail(h2c->mbuf);
1520 retry:
1521 if (!h2_get_buf(h2c, res)) {
1522 h2c->flags |= H2_CF_MUX_MALLOC;
1523 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001524 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001525 }
1526
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001527 ret = b_istput(res, ist2(buf.area, buf.data));
Willy Tarreaube5b7152017-09-25 16:25:39 +02001528 if (unlikely(ret <= 0)) {
1529 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001530 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1531 goto retry;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001532 h2c->flags |= H2_CF_MUX_MFULL;
1533 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001534 }
1535 else {
1536 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001537 ret = 0;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001538 }
1539 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001540 out:
1541 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001542 return ret;
1543}
1544
Willy Tarreau52eed752017-09-22 15:05:09 +02001545/* Try to receive a connection preface, then upon success try to send our
1546 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1547 * missing data. It may return an error in h2c.
1548 */
1549static int h2c_frt_recv_preface(struct h2c *h2c)
1550{
1551 int ret1;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001552 int ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001553
Willy Tarreau7838a792019-08-12 18:42:03 +02001554 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
1555
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001556 ret1 = b_isteq(&h2c->dbuf, 0, b_data(&h2c->dbuf), ist(H2_CONN_PREFACE));
Willy Tarreau52eed752017-09-22 15:05:09 +02001557
1558 if (unlikely(ret1 <= 0)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02001559 if (ret1 < 0)
1560 sess_log(h2c->conn->owner);
1561
Willy Tarreau52eed752017-09-22 15:05:09 +02001562 if (ret1 < 0 || conn_xprt_read0_pending(h2c->conn))
1563 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001564 ret2 = 0;
1565 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02001566 }
1567
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001568 ret2 = h2c_send_settings(h2c);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001569 if (ret2 > 0)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001570 b_del(&h2c->dbuf, ret1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001571 out:
1572 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001573 return ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001574}
1575
Willy Tarreau01b44822018-10-03 14:26:37 +02001576/* Try to send a connection preface, then upon success try to send our
1577 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1578 * missing data. It may return an error in h2c.
1579 */
1580static int h2c_bck_send_preface(struct h2c *h2c)
1581{
1582 struct buffer *res;
Willy Tarreau7838a792019-08-12 18:42:03 +02001583 int ret = 0;
1584
1585 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02001586
1587 if (h2c_mux_busy(h2c, NULL)) {
1588 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001589 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001590 }
1591
Willy Tarreaubcc45952019-05-26 10:05:50 +02001592 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001593 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001594 if (!h2_get_buf(h2c, res)) {
Willy Tarreau01b44822018-10-03 14:26:37 +02001595 h2c->flags |= H2_CF_MUX_MALLOC;
1596 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001597 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001598 }
1599
1600 if (!b_data(res)) {
1601 /* preface not yet sent */
Willy Tarreau9c218e72019-05-26 10:08:28 +02001602 ret = b_istput(res, ist(H2_CONN_PREFACE));
1603 if (unlikely(ret <= 0)) {
1604 if (!ret) {
1605 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1606 goto retry;
1607 h2c->flags |= H2_CF_MUX_MFULL;
1608 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001609 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001610 }
1611 else {
1612 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001613 ret = 0;
1614 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001615 }
1616 }
Willy Tarreau01b44822018-10-03 14:26:37 +02001617 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001618 ret = h2c_send_settings(h2c);
1619 out:
1620 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
1621 return ret;
Willy Tarreau01b44822018-10-03 14:26:37 +02001622}
1623
Willy Tarreau081d4722017-05-16 21:51:05 +02001624/* try to send a GOAWAY frame on the connection to report an error or a graceful
1625 * shutdown, with h2c->errcode as the error code. Returns > 0 on success or zero
1626 * if nothing was done. It uses h2c->last_sid as the advertised ID, or copies it
1627 * from h2c->max_id if it's not set yet (<0). In case of lack of room to write
1628 * the message, it subscribes the requester (either <h2s> or <h2c>) to future
1629 * notifications. It sets H2_CF_GOAWAY_SENT on success, and H2_CF_GOAWAY_FAILED
1630 * on unrecoverable failure. It will not attempt to send one again in this last
1631 * case so that it is safe to use h2c_error() to report such errors.
1632 */
1633static int h2c_send_goaway_error(struct h2c *h2c, struct h2s *h2s)
1634{
1635 struct buffer *res;
1636 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02001637 int ret = 0;
Willy Tarreau081d4722017-05-16 21:51:05 +02001638
Willy Tarreau7838a792019-08-12 18:42:03 +02001639 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
1640
1641 if (h2c->flags & H2_CF_GOAWAY_FAILED) {
1642 ret = 1; // claim that it worked
1643 goto out;
1644 }
Willy Tarreau081d4722017-05-16 21:51:05 +02001645
1646 if (h2c_mux_busy(h2c, h2s)) {
1647 if (h2s)
1648 h2s->flags |= H2_SF_BLK_MBUSY;
1649 else
1650 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001651 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001652 }
1653
Willy Tarreau9c218e72019-05-26 10:08:28 +02001654 /* len: 8, type: 7, flags: none, sid: 0 */
1655 memcpy(str, "\x00\x00\x08\x07\x00\x00\x00\x00\x00", 9);
1656
1657 if (h2c->last_sid < 0)
1658 h2c->last_sid = h2c->max_id;
1659
1660 write_n32(str + 9, h2c->last_sid);
1661 write_n32(str + 13, h2c->errcode);
1662
Willy Tarreaubcc45952019-05-26 10:05:50 +02001663 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001664 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001665 if (!h2_get_buf(h2c, res)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02001666 h2c->flags |= H2_CF_MUX_MALLOC;
1667 if (h2s)
1668 h2s->flags |= H2_SF_BLK_MROOM;
1669 else
1670 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001671 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001672 }
1673
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001674 ret = b_istput(res, ist2(str, 17));
Willy Tarreau081d4722017-05-16 21:51:05 +02001675 if (unlikely(ret <= 0)) {
1676 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001677 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1678 goto retry;
Willy Tarreau081d4722017-05-16 21:51:05 +02001679 h2c->flags |= H2_CF_MUX_MFULL;
1680 if (h2s)
1681 h2s->flags |= H2_SF_BLK_MROOM;
1682 else
1683 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001684 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001685 }
1686 else {
1687 /* we cannot report this error using GOAWAY, so we mark
1688 * it and claim a success.
1689 */
1690 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1691 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau7838a792019-08-12 18:42:03 +02001692 ret = 1;
1693 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001694 }
1695 }
1696 h2c->flags |= H2_CF_GOAWAY_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02001697 out:
1698 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
Willy Tarreau081d4722017-05-16 21:51:05 +02001699 return ret;
1700}
1701
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001702/* Try to send an RST_STREAM frame on the connection for the indicated stream
1703 * during mux operations. This stream must be valid and cannot be closed
1704 * already. h2s->id will be used for the stream ID and h2s->errcode will be
1705 * used for the error code. h2s->st will be update to H2_SS_CLOSED if it was
1706 * not yet.
1707 *
1708 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1709 * to write the message, it subscribes the stream to future notifications.
1710 */
1711static int h2s_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1712{
1713 struct buffer *res;
1714 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001715 int ret = 0;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001716
Willy Tarreau7838a792019-08-12 18:42:03 +02001717 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
1718
1719 if (!h2s || h2s->st == H2_SS_CLOSED) {
1720 ret = 1;
1721 goto out;
1722 }
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001723
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001724 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1725 * RST_STREAM in response to a RST_STREAM frame.
1726 */
Willy Tarreau231f6162019-08-06 10:01:40 +02001727 if (h2c->dsi == h2s->id && h2c->dft == H2_FT_RST_STREAM) {
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001728 ret = 1;
1729 goto ignore;
1730 }
1731
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001732 if (h2c_mux_busy(h2c, h2s)) {
1733 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001734 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001735 }
1736
Willy Tarreau9c218e72019-05-26 10:08:28 +02001737 /* len: 4, type: 3, flags: none */
1738 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1739 write_n32(str + 5, h2s->id);
1740 write_n32(str + 9, h2s->errcode);
1741
Willy Tarreaubcc45952019-05-26 10:05:50 +02001742 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001743 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001744 if (!h2_get_buf(h2c, res)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001745 h2c->flags |= H2_CF_MUX_MALLOC;
1746 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001747 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001748 }
1749
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001750 ret = b_istput(res, ist2(str, 13));
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001751 if (unlikely(ret <= 0)) {
1752 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001753 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1754 goto retry;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001755 h2c->flags |= H2_CF_MUX_MFULL;
1756 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001757 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001758 }
1759 else {
1760 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001761 ret = 0;
1762 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001763 }
1764 }
1765
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001766 ignore:
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001767 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001768 h2s_close(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001769 out:
1770 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001771 return ret;
1772}
1773
1774/* Try to send an RST_STREAM frame on the connection for the stream being
1775 * demuxed using h2c->dsi for the stream ID. It will use h2s->errcode as the
Willy Tarreaue6888ff2018-12-23 18:26:26 +01001776 * error code, even if the stream is one of the dummy ones, and will update
1777 * h2s->st to H2_SS_CLOSED if it was not yet.
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001778 *
1779 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1780 * to write the message, it blocks the demuxer and subscribes it to future
Joseph Herlantd77575d2018-11-25 10:54:45 -08001781 * notifications. It's worth mentioning that an RST may even be sent for a
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001782 * closed stream.
Willy Tarreau27a84c92017-10-17 08:10:17 +02001783 */
1784static int h2c_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1785{
1786 struct buffer *res;
1787 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001788 int ret = 0;
1789
1790 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02001791
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001792 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1793 * RST_STREAM in response to a RST_STREAM frame.
1794 */
1795 if (h2c->dft == H2_FT_RST_STREAM) {
1796 ret = 1;
1797 goto ignore;
1798 }
1799
Willy Tarreau27a84c92017-10-17 08:10:17 +02001800 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001801 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001802 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001803 }
1804
Willy Tarreau9c218e72019-05-26 10:08:28 +02001805 /* len: 4, type: 3, flags: none */
1806 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1807
1808 write_n32(str + 5, h2c->dsi);
1809 write_n32(str + 9, h2s->errcode);
1810
Willy Tarreaubcc45952019-05-26 10:05:50 +02001811 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001812 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001813 if (!h2_get_buf(h2c, res)) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02001814 h2c->flags |= H2_CF_MUX_MALLOC;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001815 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001816 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001817 }
1818
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001819 ret = b_istput(res, ist2(str, 13));
Willy Tarreau27a84c92017-10-17 08:10:17 +02001820 if (unlikely(ret <= 0)) {
1821 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001822 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1823 goto retry;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001824 h2c->flags |= H2_CF_MUX_MFULL;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001825 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001826 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001827 }
1828 else {
1829 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001830 ret = 0;
1831 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001832 }
1833 }
1834
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001835 ignore:
Willy Tarreauab0e1da2018-10-05 10:16:37 +02001836 if (h2s->id) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02001837 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001838 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001839 }
1840
Willy Tarreau7838a792019-08-12 18:42:03 +02001841 out:
1842 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02001843 return ret;
1844}
1845
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001846/* try to send an empty DATA frame with the ES flag set to notify about the
1847 * end of stream and match a shutdown(write). If an ES was already sent as
1848 * indicated by HLOC/ERROR/RESET/CLOSED states, nothing is done. Returns > 0
1849 * on success or zero if nothing was done. In case of lack of room to write the
1850 * message, it subscribes the requesting stream to future notifications.
1851 */
1852static int h2_send_empty_data_es(struct h2s *h2s)
1853{
1854 struct h2c *h2c = h2s->h2c;
1855 struct buffer *res;
1856 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02001857 int ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001858
Willy Tarreau7838a792019-08-12 18:42:03 +02001859 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
1860
1861 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED) {
1862 ret = 1;
1863 goto out;
1864 }
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001865
1866 if (h2c_mux_busy(h2c, h2s)) {
1867 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001868 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001869 }
1870
Willy Tarreau9c218e72019-05-26 10:08:28 +02001871 /* len: 0x000000, type: 0(DATA), flags: ES=1 */
1872 memcpy(str, "\x00\x00\x00\x00\x01", 5);
1873 write_n32(str + 5, h2s->id);
1874
Willy Tarreaubcc45952019-05-26 10:05:50 +02001875 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001876 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001877 if (!h2_get_buf(h2c, res)) {
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001878 h2c->flags |= H2_CF_MUX_MALLOC;
1879 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001880 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001881 }
1882
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001883 ret = b_istput(res, ist2(str, 9));
Willy Tarreau6d8b6822017-11-07 14:39:09 +01001884 if (likely(ret > 0)) {
1885 h2s->flags |= H2_SF_ES_SENT;
1886 }
1887 else if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001888 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1889 goto retry;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01001890 h2c->flags |= H2_CF_MUX_MFULL;
1891 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01001892 }
1893 else {
1894 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001895 ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001896 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001897 out:
1898 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001899 return ret;
1900}
1901
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001902/* wake a specific stream and assign its conn_stream som CS_FL_* flags among
Willy Tarreau99ad1b32019-05-14 11:46:28 +02001903 * CS_FL_ERR_PENDING and CS_FL_ERROR if needed. The stream's state
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001904 * is automatically updated accordingly. If the stream is orphaned, it is
1905 * destroyed.
Christopher Fauletf02ca002019-03-07 16:21:34 +01001906 */
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001907static void h2s_wake_one_stream(struct h2s *h2s)
Christopher Fauletf02ca002019-03-07 16:21:34 +01001908{
Willy Tarreau7838a792019-08-12 18:42:03 +02001909 struct h2c *h2c = h2s->h2c;
1910
1911 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn, h2s);
1912
Christopher Fauletf02ca002019-03-07 16:21:34 +01001913 if (!h2s->cs) {
1914 /* this stream was already orphaned */
1915 h2s_destroy(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001916 TRACE_DEVEL("leaving with no h2s", H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01001917 return;
1918 }
1919
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001920 if (conn_xprt_read0_pending(h2s->h2c->conn)) {
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001921 if (h2s->st == H2_SS_OPEN)
1922 h2s->st = H2_SS_HREM;
1923 else if (h2s->st == H2_SS_HLOC)
1924 h2s_close(h2s);
1925 }
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001926
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001927 if ((h2s->h2c->st0 >= H2_CS_ERROR || h2s->h2c->conn->flags & CO_FL_ERROR) ||
1928 (h2s->h2c->last_sid > 0 && (!h2s->id || h2s->id > h2s->h2c->last_sid))) {
1929 h2s->cs->flags |= CS_FL_ERR_PENDING;
1930 if (h2s->cs->flags & CS_FL_EOS)
1931 h2s->cs->flags |= CS_FL_ERROR;
Willy Tarreau23482912019-05-07 15:23:14 +02001932
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001933 if (h2s->st < H2_SS_ERROR)
1934 h2s->st = H2_SS_ERROR;
1935 }
Christopher Fauletf02ca002019-03-07 16:21:34 +01001936
1937 h2s_alert(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001938 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01001939}
1940
1941/* wake the streams attached to the connection, whose id is greater than <last>
1942 * or unassigned.
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001943 */
Willy Tarreau23482912019-05-07 15:23:14 +02001944static void h2_wake_some_streams(struct h2c *h2c, int last)
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001945{
1946 struct eb32_node *node;
1947 struct h2s *h2s;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001948
Willy Tarreau7838a792019-08-12 18:42:03 +02001949 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn);
1950
Christopher Fauletf02ca002019-03-07 16:21:34 +01001951 /* Wake all streams with ID > last */
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001952 node = eb32_lookup_ge(&h2c->streams_by_id, last + 1);
1953 while (node) {
1954 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001955 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001956 h2s_wake_one_stream(h2s);
Christopher Fauletf02ca002019-03-07 16:21:34 +01001957 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01001958
Christopher Fauletf02ca002019-03-07 16:21:34 +01001959 /* Wake all streams with unassigned ID (ID == 0) */
1960 node = eb32_lookup(&h2c->streams_by_id, 0);
1961 while (node) {
1962 h2s = container_of(node, struct h2s, by_id);
1963 if (h2s->id > 0)
1964 break;
1965 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001966 h2s_wake_one_stream(h2s);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001967 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001968
1969 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001970}
1971
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001972/* Wake up all blocked streams whose window size has become positive after the
1973 * mux's initial window was adjusted. This should be done after having processed
1974 * SETTINGS frames which have updated the mux's initial window size.
Willy Tarreau3421aba2017-07-27 15:41:03 +02001975 */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001976static void h2c_unblock_sfctl(struct h2c *h2c)
Willy Tarreau3421aba2017-07-27 15:41:03 +02001977{
1978 struct h2s *h2s;
1979 struct eb32_node *node;
1980
Willy Tarreau7838a792019-08-12 18:42:03 +02001981 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
1982
Willy Tarreau3421aba2017-07-27 15:41:03 +02001983 node = eb32_first(&h2c->streams_by_id);
1984 while (node) {
1985 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001986 if (h2s->flags & H2_SF_BLK_SFCTL && h2s_mws(h2s) > 0) {
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01001987 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02001988 LIST_DEL_INIT(&h2s->list);
1989 if (h2s->send_wait)
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01001990 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01001991 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02001992 node = eb32_next(node);
1993 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001994
1995 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02001996}
1997
1998/* processes a SETTINGS frame whose payload is <payload> for <plen> bytes, and
1999 * ACKs it if needed. Returns > 0 on success or zero on missing data. It may
Willy Tarreaub860c732019-01-30 15:39:55 +01002000 * return an error in h2c. The caller must have already verified frame length
2001 * and stream ID validity. Described in RFC7540#6.5.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002002 */
2003static int h2c_handle_settings(struct h2c *h2c)
2004{
2005 unsigned int offset;
2006 int error;
2007
Willy Tarreau7838a792019-08-12 18:42:03 +02002008 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
2009
Willy Tarreau3421aba2017-07-27 15:41:03 +02002010 if (h2c->dff & H2_F_SETTINGS_ACK) {
2011 if (h2c->dfl) {
2012 error = H2_ERR_FRAME_SIZE_ERROR;
2013 goto fail;
2014 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002015 goto done;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002016 }
2017
Willy Tarreau3421aba2017-07-27 15:41:03 +02002018 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002019 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau7838a792019-08-12 18:42:03 +02002020 goto out0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002021
2022 /* parse the frame */
2023 for (offset = 0; offset < h2c->dfl; offset += 6) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002024 uint16_t type = h2_get_n16(&h2c->dbuf, offset);
2025 int32_t arg = h2_get_n32(&h2c->dbuf, offset + 2);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002026
2027 switch (type) {
2028 case H2_SETTINGS_INITIAL_WINDOW_SIZE:
2029 /* we need to update all existing streams with the
2030 * difference from the previous iws.
2031 */
2032 if (arg < 0) { // RFC7540#6.5.2
2033 error = H2_ERR_FLOW_CONTROL_ERROR;
2034 goto fail;
2035 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002036 h2c->miw = arg;
2037 break;
2038 case H2_SETTINGS_MAX_FRAME_SIZE:
2039 if (arg < 16384 || arg > 16777215) { // RFC7540#6.5.2
2040 error = H2_ERR_PROTOCOL_ERROR;
2041 goto fail;
2042 }
2043 h2c->mfs = arg;
2044 break;
Willy Tarreau1b38b462017-12-03 19:02:28 +01002045 case H2_SETTINGS_ENABLE_PUSH:
2046 if (arg < 0 || arg > 1) { // RFC7540#6.5.2
2047 error = H2_ERR_PROTOCOL_ERROR;
2048 goto fail;
2049 }
2050 break;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01002051 case H2_SETTINGS_MAX_CONCURRENT_STREAMS:
2052 if (h2c->flags & H2_CF_IS_BACK) {
2053 /* the limit is only for the backend; for the frontend it is our limit */
2054 if ((unsigned int)arg > h2_settings_max_concurrent_streams)
2055 arg = h2_settings_max_concurrent_streams;
2056 h2c->streams_limit = arg;
2057 }
2058 break;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002059 }
2060 }
2061
2062 /* need to ACK this frame now */
2063 h2c->st0 = H2_CS_FRAME_A;
Willy Tarreau7838a792019-08-12 18:42:03 +02002064 done:
2065 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002066 return 1;
2067 fail:
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002068 if (!(h2c->flags & H2_CF_IS_BACK))
2069 sess_log(h2c->conn->owner);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002070 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002071 out0:
2072 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 +02002073 return 0;
2074}
2075
2076/* try to send an ACK for a settings frame on the connection. Returns > 0 on
2077 * success or one of the h2_status values.
2078 */
2079static int h2c_ack_settings(struct h2c *h2c)
2080{
2081 struct buffer *res;
2082 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002083 int ret = 0;
2084
2085 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002086
2087 if (h2c_mux_busy(h2c, NULL)) {
2088 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002089 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002090 }
2091
Willy Tarreau9c218e72019-05-26 10:08:28 +02002092 memcpy(str,
2093 "\x00\x00\x00" /* length : 0 (no data) */
2094 "\x04" "\x01" /* type : 4, flags : ACK */
2095 "\x00\x00\x00\x00" /* stream ID */, 9);
2096
Willy Tarreaubcc45952019-05-26 10:05:50 +02002097 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002098 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002099 if (!h2_get_buf(h2c, res)) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02002100 h2c->flags |= H2_CF_MUX_MALLOC;
2101 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002102 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002103 }
2104
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002105 ret = b_istput(res, ist2(str, 9));
Willy Tarreau3421aba2017-07-27 15:41:03 +02002106 if (unlikely(ret <= 0)) {
2107 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002108 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2109 goto retry;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002110 h2c->flags |= H2_CF_MUX_MFULL;
2111 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002112 }
2113 else {
2114 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002115 ret = 0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002116 }
2117 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002118 out:
2119 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002120 return ret;
2121}
2122
Willy Tarreaucf68c782017-10-10 17:11:41 +02002123/* processes a PING frame and schedules an ACK if needed. The caller must pass
2124 * the pointer to the payload in <payload>. Returns > 0 on success or zero on
Willy Tarreaub860c732019-01-30 15:39:55 +01002125 * missing data. The caller must have already verified frame length
2126 * and stream ID validity.
Willy Tarreaucf68c782017-10-10 17:11:41 +02002127 */
2128static int h2c_handle_ping(struct h2c *h2c)
2129{
Willy Tarreaucf68c782017-10-10 17:11:41 +02002130 /* schedule a response */
Willy Tarreau68ed6412017-12-03 18:15:56 +01002131 if (!(h2c->dff & H2_F_PING_ACK))
Willy Tarreaucf68c782017-10-10 17:11:41 +02002132 h2c->st0 = H2_CS_FRAME_A;
2133 return 1;
2134}
2135
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002136/* Try to send a window update for stream id <sid> and value <increment>.
2137 * Returns > 0 on success or zero on missing room or failure. It may return an
2138 * error in h2c.
2139 */
2140static int h2c_send_window_update(struct h2c *h2c, int sid, uint32_t increment)
2141{
2142 struct buffer *res;
2143 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002144 int ret = 0;
2145
2146 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002147
2148 if (h2c_mux_busy(h2c, NULL)) {
2149 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002150 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002151 }
2152
Willy Tarreau9c218e72019-05-26 10:08:28 +02002153 /* length: 4, type: 8, flags: none */
2154 memcpy(str, "\x00\x00\x04\x08\x00", 5);
2155 write_n32(str + 5, sid);
2156 write_n32(str + 9, increment);
2157
Willy Tarreaubcc45952019-05-26 10:05:50 +02002158 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002159 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002160 if (!h2_get_buf(h2c, res)) {
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002161 h2c->flags |= H2_CF_MUX_MALLOC;
2162 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002163 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002164 }
2165
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002166 ret = b_istput(res, ist2(str, 13));
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002167 if (unlikely(ret <= 0)) {
2168 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002169 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2170 goto retry;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002171 h2c->flags |= H2_CF_MUX_MFULL;
2172 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002173 }
2174 else {
2175 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002176 ret = 0;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002177 }
2178 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002179 out:
2180 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002181 return ret;
2182}
2183
2184/* try to send pending window update for the connection. It's safe to call it
2185 * with no pending updates. Returns > 0 on success or zero on missing room or
2186 * failure. It may return an error in h2c.
2187 */
2188static int h2c_send_conn_wu(struct h2c *h2c)
2189{
2190 int ret = 1;
2191
Willy Tarreau7838a792019-08-12 18:42:03 +02002192 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2193
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002194 if (h2c->rcvd_c <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002195 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002196
Willy Tarreau97aaa672018-12-23 09:49:04 +01002197 if (!(h2c->flags & H2_CF_WINDOW_OPENED)) {
2198 /* increase the advertised connection window to 2G on
2199 * first update.
2200 */
2201 h2c->flags |= H2_CF_WINDOW_OPENED;
2202 h2c->rcvd_c += H2_INITIAL_WINDOW_INCREMENT;
2203 }
2204
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002205 /* send WU for the connection */
2206 ret = h2c_send_window_update(h2c, 0, h2c->rcvd_c);
2207 if (ret > 0)
2208 h2c->rcvd_c = 0;
2209
Willy Tarreau7838a792019-08-12 18:42:03 +02002210 out:
2211 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002212 return ret;
2213}
2214
2215/* try to send pending window update for the current dmux stream. It's safe to
2216 * call it with no pending updates. Returns > 0 on success or zero on missing
2217 * room or failure. It may return an error in h2c.
2218 */
2219static int h2c_send_strm_wu(struct h2c *h2c)
2220{
2221 int ret = 1;
2222
Willy Tarreau7838a792019-08-12 18:42:03 +02002223 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2224
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002225 if (h2c->rcvd_s <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002226 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002227
2228 /* send WU for the stream */
2229 ret = h2c_send_window_update(h2c, h2c->dsi, h2c->rcvd_s);
2230 if (ret > 0)
2231 h2c->rcvd_s = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002232 out:
2233 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002234 return ret;
2235}
2236
Willy Tarreaucf68c782017-10-10 17:11:41 +02002237/* try to send an ACK for a ping frame on the connection. Returns > 0 on
2238 * success, 0 on missing data or one of the h2_status values.
2239 */
2240static int h2c_ack_ping(struct h2c *h2c)
2241{
2242 struct buffer *res;
2243 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02002244 int ret = 0;
2245
2246 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002247
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002248 if (b_data(&h2c->dbuf) < 8)
Willy Tarreau7838a792019-08-12 18:42:03 +02002249 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002250
2251 if (h2c_mux_busy(h2c, NULL)) {
2252 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002253 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002254 }
2255
Willy Tarreaucf68c782017-10-10 17:11:41 +02002256 memcpy(str,
2257 "\x00\x00\x08" /* length : 8 (same payload) */
2258 "\x06" "\x01" /* type : 6, flags : ACK */
2259 "\x00\x00\x00\x00" /* stream ID */, 9);
2260
2261 /* copy the original payload */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002262 h2_get_buf_bytes(str + 9, 8, &h2c->dbuf, 0);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002263
Willy Tarreau9c218e72019-05-26 10:08:28 +02002264 res = br_tail(h2c->mbuf);
2265 retry:
2266 if (!h2_get_buf(h2c, res)) {
2267 h2c->flags |= H2_CF_MUX_MALLOC;
2268 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002269 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02002270 }
2271
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002272 ret = b_istput(res, ist2(str, 17));
Willy Tarreaucf68c782017-10-10 17:11:41 +02002273 if (unlikely(ret <= 0)) {
2274 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002275 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2276 goto retry;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002277 h2c->flags |= H2_CF_MUX_MFULL;
2278 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002279 }
2280 else {
2281 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002282 ret = 0;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002283 }
2284 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002285 out:
2286 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002287 return ret;
2288}
2289
Willy Tarreau26f95952017-07-27 17:18:30 +02002290/* processes a WINDOW_UPDATE frame whose payload is <payload> for <plen> bytes.
2291 * Returns > 0 on success or zero on missing data. It may return an error in
Willy Tarreaub860c732019-01-30 15:39:55 +01002292 * h2c or h2s. The caller must have already verified frame length and stream ID
2293 * validity. Described in RFC7540#6.9.
Willy Tarreau26f95952017-07-27 17:18:30 +02002294 */
2295static int h2c_handle_window_update(struct h2c *h2c, struct h2s *h2s)
2296{
2297 int32_t inc;
2298 int error;
2299
Willy Tarreau7838a792019-08-12 18:42:03 +02002300 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
2301
Willy Tarreau26f95952017-07-27 17:18:30 +02002302 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002303 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau7838a792019-08-12 18:42:03 +02002304 goto out0;
Willy Tarreau26f95952017-07-27 17:18:30 +02002305
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002306 inc = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau26f95952017-07-27 17:18:30 +02002307
2308 if (h2c->dsi != 0) {
2309 /* stream window update */
Willy Tarreau26f95952017-07-27 17:18:30 +02002310
2311 /* it's not an error to receive WU on a closed stream */
2312 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau7838a792019-08-12 18:42:03 +02002313 goto done;
Willy Tarreau26f95952017-07-27 17:18:30 +02002314
2315 if (!inc) {
2316 error = H2_ERR_PROTOCOL_ERROR;
2317 goto strm_err;
2318 }
2319
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002320 if (h2s_mws(h2s) >= 0 && h2s_mws(h2s) + inc < 0) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002321 error = H2_ERR_FLOW_CONTROL_ERROR;
2322 goto strm_err;
2323 }
2324
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002325 h2s->sws += inc;
2326 if (h2s_mws(h2s) > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002327 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002328 LIST_DEL_INIT(&h2s->list);
2329 if (h2s->send_wait)
Olivier Houcharddddfe312018-10-10 18:51:00 +02002330 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreau26f95952017-07-27 17:18:30 +02002331 }
2332 }
2333 else {
2334 /* connection window update */
2335 if (!inc) {
2336 error = H2_ERR_PROTOCOL_ERROR;
2337 goto conn_err;
2338 }
2339
2340 if (h2c->mws >= 0 && h2c->mws + inc < 0) {
2341 error = H2_ERR_FLOW_CONTROL_ERROR;
2342 goto conn_err;
2343 }
2344
2345 h2c->mws += inc;
2346 }
2347
Willy Tarreau7838a792019-08-12 18:42:03 +02002348 done:
2349 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002350 return 1;
2351
2352 conn_err:
2353 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002354 out0:
2355 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 +02002356 return 0;
2357
2358 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002359 h2s_error(h2s, error);
2360 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002361 TRACE_DEVEL("leaving on stream error", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002362 return 0;
2363}
2364
Willy Tarreaue96b0922017-10-30 00:28:29 +01002365/* processes a GOAWAY frame, and signals all streams whose ID is greater than
Willy Tarreaub860c732019-01-30 15:39:55 +01002366 * the last ID. Returns > 0 on success or zero on missing data. The caller must
2367 * have already verified frame length and stream ID validity. Described in
2368 * RFC7540#6.8.
Willy Tarreaue96b0922017-10-30 00:28:29 +01002369 */
2370static int h2c_handle_goaway(struct h2c *h2c)
2371{
Willy Tarreaue96b0922017-10-30 00:28:29 +01002372 int last;
2373
Willy Tarreau7838a792019-08-12 18:42:03 +02002374 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002375 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002376 if (b_data(&h2c->dbuf) < h2c->dfl) {
2377 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002378 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002379 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01002380
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002381 last = h2_get_n32(&h2c->dbuf, 0);
2382 h2c->errcode = h2_get_n32(&h2c->dbuf, 4);
Willy Tarreau11cc2d62017-12-03 10:27:47 +01002383 if (h2c->last_sid < 0)
2384 h2c->last_sid = last;
Willy Tarreau23482912019-05-07 15:23:14 +02002385 h2_wake_some_streams(h2c, last);
Willy Tarreau7838a792019-08-12 18:42:03 +02002386 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002387 return 1;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002388}
2389
Willy Tarreau92153fc2017-12-03 19:46:19 +01002390/* processes a PRIORITY frame, and either skips it or rejects if it is
Willy Tarreaub860c732019-01-30 15:39:55 +01002391 * invalid. Returns > 0 on success or zero on missing data. It may return an
2392 * error in h2c. The caller must have already verified frame length and stream
2393 * ID validity. Described in RFC7540#6.3.
Willy Tarreau92153fc2017-12-03 19:46:19 +01002394 */
2395static int h2c_handle_priority(struct h2c *h2c)
2396{
Willy Tarreau7838a792019-08-12 18:42:03 +02002397 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
2398
Willy Tarreau92153fc2017-12-03 19:46:19 +01002399 /* process full frame only */
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002400 if (b_data(&h2c->dbuf) < h2c->dfl) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002401 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002402 return 0;
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002403 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01002404
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002405 if (h2_get_n32(&h2c->dbuf, 0) == h2c->dsi) {
Willy Tarreau92153fc2017-12-03 19:46:19 +01002406 /* 7540#5.3 : can't depend on itself */
Willy Tarreaub860c732019-01-30 15:39:55 +01002407 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002408 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002409 return 0;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002410 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002411 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002412 return 1;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002413}
2414
Willy Tarreaucd234e92017-08-18 10:59:39 +02002415/* processes an RST_STREAM frame, and sets the 32-bit error code on the stream.
Willy Tarreaub860c732019-01-30 15:39:55 +01002416 * Returns > 0 on success or zero on missing data. The caller must have already
2417 * verified frame length and stream ID validity. Described in RFC7540#6.4.
Willy Tarreaucd234e92017-08-18 10:59:39 +02002418 */
2419static int h2c_handle_rst_stream(struct h2c *h2c, struct h2s *h2s)
2420{
Willy Tarreau7838a792019-08-12 18:42:03 +02002421 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
2422
Willy Tarreaucd234e92017-08-18 10:59:39 +02002423 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002424 if (b_data(&h2c->dbuf) < h2c->dfl) {
2425 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 +02002426 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002427 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002428
2429 /* late RST, already handled */
Willy Tarreau7838a792019-08-12 18:42:03 +02002430 if (h2s->st == H2_SS_CLOSED) {
2431 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 +02002432 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002433 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002434
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002435 h2s->errcode = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau00dd0782018-03-01 16:31:34 +01002436 h2s_close(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002437
2438 if (h2s->cs) {
Willy Tarreauec988c72018-12-19 18:00:29 +01002439 cs_set_error(h2s->cs);
Willy Tarreauf830f012018-12-19 17:44:55 +01002440 h2s_alert(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002441 }
2442
2443 h2s->flags |= H2_SF_RST_RCVD;
Willy Tarreau7838a792019-08-12 18:42:03 +02002444 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002445 return 1;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002446}
2447
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002448/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2449 * It may return an error in h2c or h2s. The caller must consider that the
2450 * return value is the new h2s in case one was allocated (most common case).
2451 * Described in RFC7540#6.2. Most of the
Willy Tarreau13278b42017-10-13 19:23:14 +02002452 * errors here are reported as connection errors since it's impossible to
2453 * recover from such errors after the compression context has been altered.
2454 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002455static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau13278b42017-10-13 19:23:14 +02002456{
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002457 struct buffer rxbuf = BUF_NULL;
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002458 unsigned long long body_len = 0;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002459 uint32_t flags = 0;
Willy Tarreau13278b42017-10-13 19:23:14 +02002460 int error;
2461
Willy Tarreau7838a792019-08-12 18:42:03 +02002462 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2463
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002464 if (!b_size(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002465 goto out; // empty buffer
Willy Tarreau13278b42017-10-13 19:23:14 +02002466
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002467 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002468 goto out; // incomplete frame
Willy Tarreau13278b42017-10-13 19:23:14 +02002469
2470 /* now either the frame is complete or the buffer is complete */
2471 if (h2s->st != H2_SS_IDLE) {
Willy Tarreau88d138e2019-01-02 19:38:14 +01002472 /* The stream exists/existed, this must be a trailers frame */
2473 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreauaab1a602019-05-06 11:12:18 +02002474 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &body_len);
2475 /* unrecoverable error ? */
2476 if (h2c->st0 >= H2_CS_ERROR)
2477 goto out;
2478
2479 if (error == 0)
2480 goto out; // missing data
2481
2482 if (error < 0) {
2483 /* Failed to decode this frame (e.g. too large request)
2484 * but the HPACK decompressor is still synchronized.
2485 */
2486 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
2487 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau88d138e2019-01-02 19:38:14 +01002488 goto out;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002489 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01002490 goto done;
2491 }
Willy Tarreau1f035502019-01-30 11:44:07 +01002492 /* the connection was already killed by an RST, let's consume
2493 * the data and send another RST.
2494 */
2495 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
2496 h2s = (struct h2s*)h2_error_stream;
2497 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002498 }
2499 else if (h2c->dsi <= h2c->max_id || !(h2c->dsi & 1)) {
2500 /* RFC7540#5.1.1 stream id > prev ones, and must be odd here */
2501 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002502 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02002503 goto conn_err;
2504 }
Willy Tarreau415b1ee2019-01-02 13:59:43 +01002505 else if (h2c->flags & H2_CF_DEM_TOOMANY)
2506 goto out; // IDLE but too many cs still present
Willy Tarreau13278b42017-10-13 19:23:14 +02002507
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002508 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002509
Willy Tarreau25919232019-01-03 14:48:18 +01002510 /* unrecoverable error ? */
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002511 if (h2c->st0 >= H2_CS_ERROR)
2512 goto out;
2513
Willy Tarreau25919232019-01-03 14:48:18 +01002514 if (error <= 0) {
2515 if (error == 0)
2516 goto out; // missing data
2517
2518 /* Failed to decode this stream (e.g. too large request)
2519 * but the HPACK decompressor is still synchronized.
2520 */
2521 h2s = (struct h2s*)h2_error_stream;
2522 goto send_rst;
2523 }
2524
Willy Tarreau22de8d32018-09-05 19:55:58 +02002525 /* Note: we don't emit any other logs below because ff we return
Willy Tarreaua8e49542018-10-03 18:53:55 +02002526 * positively from h2c_frt_stream_new(), the stream will report the error,
2527 * and if we return in error, h2c_frt_stream_new() will emit the error.
Willy Tarreau22de8d32018-09-05 19:55:58 +02002528 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02002529 h2s = h2c_frt_stream_new(h2c, h2c->dsi);
Willy Tarreau13278b42017-10-13 19:23:14 +02002530 if (!h2s) {
Willy Tarreau96a10c22018-12-23 18:30:44 +01002531 h2s = (struct h2s*)h2_refused_stream;
2532 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002533 }
2534
2535 h2s->st = H2_SS_OPEN;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002536 h2s->rxbuf = rxbuf;
2537 h2s->flags |= flags;
Willy Tarreau1915ca22019-01-24 11:49:37 +01002538 h2s->body_len = body_len;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002539
Willy Tarreau88d138e2019-01-02 19:38:14 +01002540 done:
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002541 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau13278b42017-10-13 19:23:14 +02002542 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002543
2544 if (h2s->flags & H2_SF_ES_RCVD) {
Willy Tarreaufc10f592019-01-30 19:28:32 +01002545 if (h2s->st == H2_SS_OPEN)
2546 h2s->st = H2_SS_HREM;
2547 else
2548 h2s_close(h2s);
Willy Tarreau13278b42017-10-13 19:23:14 +02002549 }
2550
Willy Tarreau3a429f02019-01-03 11:41:50 +01002551 /* update the max stream ID if the request is being processed */
2552 if (h2s->id > h2c->max_id)
2553 h2c->max_id = h2s->id;
Willy Tarreau13278b42017-10-13 19:23:14 +02002554
Willy Tarreau8fecec22019-08-30 07:29:53 +02002555 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 +01002556 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002557
2558 conn_err:
2559 h2c_error(h2c, error);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002560 goto out;
Willy Tarreau13278b42017-10-13 19:23:14 +02002561
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002562 out:
2563 h2_release_buf(h2c, &rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002564 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 +01002565 return NULL;
Willy Tarreau96a10c22018-12-23 18:30:44 +01002566
2567 send_rst:
2568 /* make the demux send an RST for the current stream. We may only
2569 * do this if we're certain that the HEADERS frame was properly
2570 * decompressed so that the HPACK decoder is still kept up to date.
2571 */
2572 h2_release_buf(h2c, &rxbuf);
2573 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002574
2575 TRACE_USER("rejected H2 request", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn,, &rxbuf);
2576 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau96a10c22018-12-23 18:30:44 +01002577 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002578}
2579
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002580/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2581 * It may return an error in h2c or h2s. Described in RFC7540#6.2. Most of the
2582 * errors here are reported as connection errors since it's impossible to
2583 * recover from such errors after the compression context has been altered.
2584 */
2585static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
2586{
Christopher Faulet6884aa32019-09-23 15:28:20 +02002587 struct buffer rxbuf = BUF_NULL;
2588 unsigned long long body_len = 0;
2589 uint32_t flags = 0;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002590 int error;
2591
Willy Tarreau7838a792019-08-12 18:42:03 +02002592 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2593
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002594 if (!b_size(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002595 goto fail; // empty buffer
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002596
2597 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002598 goto fail; // incomplete frame
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002599
Christopher Faulet6884aa32019-09-23 15:28:20 +02002600 if (h2s->st != H2_SS_CLOSED) {
2601 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &h2s->body_len);
2602 }
2603 else {
2604 /* the connection was already killed by an RST, let's consume
2605 * the data and send another RST.
2606 */
2607 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
Christopher Fauletea7a7782019-09-26 16:19:13 +02002608 h2s = (struct h2s*)h2_error_stream;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002609 h2c->st0 = H2_CS_FRAME_E;
2610 goto send_rst;
2611 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002612
Willy Tarreau25919232019-01-03 14:48:18 +01002613 /* unrecoverable error ? */
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002614 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002615 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002616
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002617 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2618 /* RFC7540#5.1 */
2619 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2620 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002621 goto fail;
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002622 }
2623
Willy Tarreau25919232019-01-03 14:48:18 +01002624 if (error <= 0) {
2625 if (error == 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002626 goto fail; // missing data
Willy Tarreau25919232019-01-03 14:48:18 +01002627
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002628 /* stream error : send RST_STREAM */
Willy Tarreau25919232019-01-03 14:48:18 +01002629 h2s_error(h2s, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002630 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002631 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002632 }
2633
Christopher Fauletfa922f02019-05-07 10:55:17 +02002634 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002635 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002636
Willy Tarreau927b88b2019-03-04 08:03:25 +01002637 if (h2s->cs && h2s->cs->flags & CS_FL_ERROR && h2s->st < H2_SS_ERROR)
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002638 h2s->st = H2_SS_ERROR;
Christopher Fauletfa922f02019-05-07 10:55:17 +02002639 else if (h2s->flags & H2_SF_ES_RCVD) {
2640 if (h2s->st == H2_SS_OPEN)
2641 h2s->st = H2_SS_HREM;
2642 else if (h2s->st == H2_SS_HLOC)
2643 h2s_close(h2s);
2644 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002645
Willy Tarreau8fecec22019-08-30 07:29:53 +02002646 TRACE_USER("rcvd H2 response", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn,, &h2s->rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002647 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002648 return h2s;
Willy Tarreau7838a792019-08-12 18:42:03 +02002649 fail:
2650 TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2651 return NULL;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002652
2653 send_rst:
2654 /* make the demux send an RST for the current stream. We may only
2655 * do this if we're certain that the HEADERS frame was properly
2656 * decompressed so that the HPACK decoder is still kept up to date.
2657 */
2658 h2_release_buf(h2c, &rxbuf);
2659 h2c->st0 = H2_CS_FRAME_E;
2660
2661 TRACE_USER("rejected H2 response", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn,, &rxbuf);
2662 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2663 return h2s;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002664}
2665
Willy Tarreau454f9052017-10-26 19:40:35 +02002666/* processes a DATA frame. Returns > 0 on success or zero on missing data.
2667 * It may return an error in h2c or h2s. Described in RFC7540#6.1.
2668 */
2669static int h2c_frt_handle_data(struct h2c *h2c, struct h2s *h2s)
2670{
2671 int error;
2672
Willy Tarreau7838a792019-08-12 18:42:03 +02002673 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2674
Willy Tarreau454f9052017-10-26 19:40:35 +02002675 /* note that empty DATA frames are perfectly valid and sometimes used
2676 * to signal an end of stream (with the ES flag).
2677 */
2678
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002679 if (!b_size(&h2c->dbuf) && h2c->dfl)
Willy Tarreau7838a792019-08-12 18:42:03 +02002680 goto fail; // empty buffer
Willy Tarreau454f9052017-10-26 19:40:35 +02002681
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002682 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002683 goto fail; // incomplete frame
Willy Tarreau454f9052017-10-26 19:40:35 +02002684
2685 /* now either the frame is complete or the buffer is complete */
2686
Willy Tarreau454f9052017-10-26 19:40:35 +02002687 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2688 /* RFC7540#6.1 */
2689 error = H2_ERR_STREAM_CLOSED;
2690 goto strm_err;
2691 }
2692
Christopher Faulet4f09ec82019-06-19 09:25:58 +02002693 if ((h2s->flags & H2_SF_DATA_CLEN) && (h2c->dfl - h2c->dpl) > h2s->body_len) {
Willy Tarreau1915ca22019-01-24 11:49:37 +01002694 /* RFC7540#8.1.2 */
2695 error = H2_ERR_PROTOCOL_ERROR;
2696 goto strm_err;
2697 }
2698
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002699 if (!h2_frt_transfer_data(h2s))
Willy Tarreau7838a792019-08-12 18:42:03 +02002700 goto fail;
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002701
Willy Tarreau454f9052017-10-26 19:40:35 +02002702 /* call the upper layers to process the frame, then let the upper layer
2703 * notify the stream about any change.
2704 */
2705 if (!h2s->cs) {
Willy Tarreau082c4572019-08-06 10:11:02 +02002706 /* The upper layer has already closed, this may happen on
2707 * 4xx/redirects during POST, or when receiving a response
2708 * from an H2 server after the client has aborted.
2709 */
2710 error = H2_ERR_CANCEL;
Willy Tarreau454f9052017-10-26 19:40:35 +02002711 goto strm_err;
2712 }
2713
Willy Tarreau8f650c32017-11-21 19:36:21 +01002714 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002715 goto fail;
Willy Tarreau8f650c32017-11-21 19:36:21 +01002716
Willy Tarreau721c9742017-11-07 11:05:42 +01002717 if (h2s->st >= H2_SS_ERROR) {
Willy Tarreau454f9052017-10-26 19:40:35 +02002718 /* stream error : send RST_STREAM */
Willy Tarreaua20a5192017-12-27 11:02:06 +01002719 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02002720 }
2721
2722 /* check for completion : the callee will change this to FRAME_A or
2723 * FRAME_H once done.
2724 */
2725 if (h2c->st0 == H2_CS_FRAME_P)
Willy Tarreau7838a792019-08-12 18:42:03 +02002726 goto fail;
Willy Tarreau454f9052017-10-26 19:40:35 +02002727
Willy Tarreauc4134ba2017-12-11 18:45:08 +01002728 /* last frame */
2729 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02002730 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreaufc10f592019-01-30 19:28:32 +01002731 if (h2s->st == H2_SS_OPEN)
2732 h2s->st = H2_SS_HREM;
2733 else
2734 h2s_close(h2s);
2735
Willy Tarreau1915ca22019-01-24 11:49:37 +01002736 if (h2s->flags & H2_SF_DATA_CLEN && h2s->body_len) {
2737 /* RFC7540#8.1.2 */
2738 error = H2_ERR_PROTOCOL_ERROR;
2739 goto strm_err;
2740 }
Willy Tarreauc4134ba2017-12-11 18:45:08 +01002741 }
2742
Willy Tarreau7838a792019-08-12 18:42:03 +02002743 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02002744 return 1;
2745
Willy Tarreau454f9052017-10-26 19:40:35 +02002746 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002747 h2s_error(h2s, error);
2748 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002749 fail:
2750 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 +02002751 return 0;
2752}
2753
Willy Tarreau63864812019-08-07 14:25:20 +02002754/* check that the current frame described in h2c->{dsi,dft,dfl,dff,...} is
2755 * valid for the current stream state. This is needed only after parsing the
2756 * frame header but in practice it can be performed at any time during
2757 * H2_CS_FRAME_P since no state transition happens there. Returns >0 on success
2758 * or 0 in case of error, in which case either h2s or h2c will carry an error.
2759 */
2760static int h2_frame_check_vs_state(struct h2c *h2c, struct h2s *h2s)
2761{
Willy Tarreau7838a792019-08-12 18:42:03 +02002762 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
2763
Willy Tarreau63864812019-08-07 14:25:20 +02002764 if (h2s->st == H2_SS_IDLE &&
2765 h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) {
2766 /* RFC7540#5.1: any frame other than HEADERS or PRIORITY in
2767 * this state MUST be treated as a connection error
2768 */
2769 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002770 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau63864812019-08-07 14:25:20 +02002771 /* only log if no other stream can report the error */
2772 sess_log(h2c->conn->owner);
2773 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002774 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 +02002775 return 0;
2776 }
2777
2778 if (h2s->st == H2_SS_HREM && h2c->dft != H2_FT_WINDOW_UPDATE &&
2779 h2c->dft != H2_FT_RST_STREAM && h2c->dft != H2_FT_PRIORITY) {
2780 /* RFC7540#5.1: any frame other than WU/PRIO/RST in
2781 * this state MUST be treated as a stream error.
2782 * 6.2, 6.6 and 6.10 further mandate that HEADERS/
2783 * PUSH_PROMISE/CONTINUATION cause connection errors.
2784 */
2785 if (h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK)
2786 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2787 else
2788 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02002789 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 +02002790 return 0;
2791 }
2792
2793 /* Below the management of frames received in closed state is a
2794 * bit hackish because the spec makes strong differences between
2795 * streams closed by receiving RST, sending RST, and seeing ES
2796 * in both directions. In addition to this, the creation of a
2797 * new stream reusing the identifier of a closed one will be
2798 * detected here. Given that we cannot keep track of all closed
2799 * streams forever, we consider that unknown closed streams were
2800 * closed on RST received, which allows us to respond with an
2801 * RST without breaking the connection (eg: to abort a transfer).
2802 * Some frames have to be silently ignored as well.
2803 */
2804 if (h2s->st == H2_SS_CLOSED && h2c->dsi) {
2805 if (!(h2c->flags & H2_CF_IS_BACK) && h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
2806 /* #5.1.1: The identifier of a newly
2807 * established stream MUST be numerically
2808 * greater than all streams that the initiating
2809 * endpoint has opened or reserved. This
2810 * governs streams that are opened using a
2811 * HEADERS frame and streams that are reserved
2812 * using PUSH_PROMISE. An endpoint that
2813 * receives an unexpected stream identifier
2814 * MUST respond with a connection error.
2815 */
2816 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02002817 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 +02002818 return 0;
2819 }
2820
Willy Tarreau4c08f122019-09-26 08:47:15 +02002821 if (h2s->flags & H2_SF_RST_RCVD &&
2822 !(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 +02002823 /* RFC7540#5.1:closed: an endpoint that
2824 * receives any frame other than PRIORITY after
2825 * receiving a RST_STREAM MUST treat that as a
2826 * stream error of type STREAM_CLOSED.
2827 *
2828 * Note that old streams fall into this category
2829 * and will lead to an RST being sent.
2830 *
2831 * However, we cannot generalize this to all frame types. Those
2832 * carrying compression state must still be processed before
2833 * being dropped or we'll desynchronize the decoder. This can
2834 * happen with request trailers received after sending an
2835 * RST_STREAM, or with header/trailers responses received after
2836 * sending RST_STREAM (aborted stream).
Willy Tarreau4c08f122019-09-26 08:47:15 +02002837 *
2838 * In addition, since our CLOSED streams always carry the
2839 * RST_RCVD bit, we don't want to accidently catch valid
2840 * frames for a closed stream, i.e. RST/PRIO/WU.
Willy Tarreau63864812019-08-07 14:25:20 +02002841 */
2842 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2843 h2c->st0 = H2_CS_FRAME_E;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002844 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 +02002845 return 0;
2846 }
2847
2848 /* RFC7540#5.1:closed: if this state is reached as a
2849 * result of sending a RST_STREAM frame, the peer that
2850 * receives the RST_STREAM might have already sent
2851 * frames on the stream that cannot be withdrawn. An
2852 * endpoint MUST ignore frames that it receives on
2853 * closed streams after it has sent a RST_STREAM
2854 * frame. An endpoint MAY choose to limit the period
2855 * over which it ignores frames and treat frames that
2856 * arrive after this time as being in error.
2857 */
2858 if (h2s->id && !(h2s->flags & H2_SF_RST_SENT)) {
2859 /* RFC7540#5.1:closed: any frame other than
2860 * PRIO/WU/RST in this state MUST be treated as
2861 * a connection error
2862 */
2863 if (h2c->dft != H2_FT_RST_STREAM &&
2864 h2c->dft != H2_FT_PRIORITY &&
2865 h2c->dft != H2_FT_WINDOW_UPDATE) {
2866 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02002867 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 +02002868 return 0;
2869 }
2870 }
2871 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002872 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02002873 return 1;
2874}
2875
Willy Tarreaubc933932017-10-09 16:21:43 +02002876/* process Rx frames to be demultiplexed */
2877static void h2_process_demux(struct h2c *h2c)
2878{
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002879 struct h2s *h2s = NULL, *tmp_h2s;
Willy Tarreau54f46e52019-01-30 15:11:03 +01002880 struct h2_fh hdr;
2881 unsigned int padlen = 0;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002882 int32_t old_iw = h2c->miw;
Willy Tarreauf3ee0692017-10-17 08:18:25 +02002883
Willy Tarreau7838a792019-08-12 18:42:03 +02002884 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
2885
Willy Tarreau081d4722017-05-16 21:51:05 +02002886 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002887 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02002888
2889 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
2890 if (h2c->st0 == H2_CS_PREFACE) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002891 TRACE_STATE("expecting preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02002892 if (h2c->flags & H2_CF_IS_BACK)
Willy Tarreau7838a792019-08-12 18:42:03 +02002893 goto out;
2894
Willy Tarreau52eed752017-09-22 15:05:09 +02002895 if (unlikely(h2c_frt_recv_preface(h2c) <= 0)) {
2896 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02002897 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002898 TRACE_PROTO("failed to receive preface", H2_EV_RX_PREFACE|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02002899 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002900 sess_log(h2c->conn->owner);
2901 }
Willy Tarreau52eed752017-09-22 15:05:09 +02002902 goto fail;
2903 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002904 TRACE_PROTO("received preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02002905
2906 h2c->max_id = 0;
2907 h2c->st0 = H2_CS_SETTINGS1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002908 TRACE_STATE("switching to SETTINGS1", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02002909 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002910
2911 if (h2c->st0 == H2_CS_SETTINGS1) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002912 /* ensure that what is pending is a valid SETTINGS frame
2913 * without an ACK.
2914 */
Willy Tarreau7838a792019-08-12 18:42:03 +02002915 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 +02002916 if (!h2_get_frame_hdr(&h2c->dbuf, &hdr)) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002917 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02002918 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002919 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 +02002920 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002921 if (!(h2c->flags & H2_CF_IS_BACK))
2922 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02002923 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002924 goto fail;
2925 }
2926
2927 if (hdr.sid || hdr.ft != H2_FT_SETTINGS || hdr.ff & H2_F_SETTINGS_ACK) {
2928 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau7838a792019-08-12 18:42:03 +02002929 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 +02002930 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2931 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002932 if (!(h2c->flags & H2_CF_IS_BACK))
2933 sess_log(h2c->conn->owner);
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002934 goto fail;
2935 }
2936
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02002937 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002938 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau7838a792019-08-12 18:42:03 +02002939 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 +02002940 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
2941 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002942 if (!(h2c->flags & H2_CF_IS_BACK))
2943 sess_log(h2c->conn->owner);
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002944 goto fail;
2945 }
2946
Willy Tarreau3bf69182018-12-21 15:34:50 +01002947 /* that's OK, switch to FRAME_P to process it. This is
2948 * a SETTINGS frame whose header has already been
2949 * deleted above.
2950 */
Willy Tarreau54f46e52019-01-30 15:11:03 +01002951 padlen = 0;
2952 goto new_frame;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002953 }
Willy Tarreau52eed752017-09-22 15:05:09 +02002954 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002955
2956 /* process as many incoming frames as possible below */
Willy Tarreau7838a792019-08-12 18:42:03 +02002957 while (1) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02002958 int ret = 0;
2959
Willy Tarreau7838a792019-08-12 18:42:03 +02002960 if (!b_data(&h2c->dbuf)) {
2961 TRACE_DEVEL("no more Rx data", H2_EV_RX_FRAME, h2c->conn);
2962 break;
2963 }
2964
2965 if (h2c->st0 >= H2_CS_ERROR) {
2966 TRACE_STATE("end of connection reported", H2_EV_RX_FRAME|H2_EV_RX_EOI, h2c->conn);
Willy Tarreau7e98c052017-10-10 15:56:59 +02002967 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02002968 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002969
2970 if (h2c->st0 == H2_CS_FRAME_H) {
Willy Tarreau30d05f32019-08-06 15:49:51 +02002971 h2c->rcvd_s = 0;
2972
Willy Tarreau7838a792019-08-12 18:42:03 +02002973 TRACE_STATE("expecting H2 frame header", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
Willy Tarreaua4428bd2018-12-22 18:11:41 +01002974 if (!h2_peek_frame_hdr(&h2c->dbuf, 0, &hdr))
Willy Tarreau7e98c052017-10-10 15:56:59 +02002975 break;
2976
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02002977 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002978 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 +02002979 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002980 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02002981 /* only log if no other stream can report the error */
2982 sess_log(h2c->conn->owner);
2983 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002984 break;
2985 }
2986
Christopher Fauletdd2a5622019-06-18 12:22:38 +02002987 padlen = 0;
Willy Tarreau3bf69182018-12-21 15:34:50 +01002988 if (h2_ft_bit(hdr.ft) & H2_FT_PADDED_MASK && hdr.ff & H2_F_PADDED) {
2989 /* If the frame is padded (HEADERS, PUSH_PROMISE or DATA),
2990 * we read the pad length and drop it from the remaining
2991 * payload (one byte + the 9 remaining ones = 10 total
2992 * removed), so we have a frame payload starting after the
2993 * pad len. Flow controlled frames (DATA) also count the
2994 * padlen in the flow control, so it must be adjusted.
2995 */
2996 if (hdr.len < 1) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002997 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 +01002998 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002999 if (!(h2c->flags & H2_CF_IS_BACK))
3000 sess_log(h2c->conn->owner);
Willy Tarreau3bf69182018-12-21 15:34:50 +01003001 goto fail;
3002 }
3003 hdr.len--;
3004
3005 if (b_data(&h2c->dbuf) < 10)
3006 break; // missing padlen
3007
3008 padlen = *(uint8_t *)b_peek(&h2c->dbuf, 9);
3009
3010 if (padlen > hdr.len) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003011 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 +01003012 /* RFC7540#6.1 : pad length = length of
3013 * frame payload or greater => error.
3014 */
3015 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003016 if (!(h2c->flags & H2_CF_IS_BACK))
3017 sess_log(h2c->conn->owner);
Willy Tarreau3bf69182018-12-21 15:34:50 +01003018 goto fail;
3019 }
3020
3021 if (h2_ft_bit(hdr.ft) & H2_FT_FC_MASK) {
3022 h2c->rcvd_c++;
3023 h2c->rcvd_s++;
3024 }
3025 b_del(&h2c->dbuf, 1);
3026 }
3027 h2_skip_frame_hdr(&h2c->dbuf);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003028
3029 new_frame:
Willy Tarreau7e98c052017-10-10 15:56:59 +02003030 h2c->dfl = hdr.len;
3031 h2c->dsi = hdr.sid;
3032 h2c->dft = hdr.ft;
3033 h2c->dff = hdr.ff;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003034 h2c->dpl = padlen;
Willy Tarreau73db4342019-09-25 07:28:44 +02003035 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 +02003036 h2c->st0 = H2_CS_FRAME_P;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003037
3038 /* check for minimum basic frame format validity */
3039 ret = h2_frame_check(h2c->dft, 1, h2c->dsi, h2c->dfl, global.tune.bufsize);
3040 if (ret != H2_ERR_NO_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003041 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 +01003042 h2c_error(h2c, ret);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003043 if (!(h2c->flags & H2_CF_IS_BACK))
3044 sess_log(h2c->conn->owner);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003045 goto fail;
3046 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003047 }
3048
Willy Tarreau9fd5aa82019-08-06 15:21:45 +02003049 /* Only H2_CS_FRAME_P, H2_CS_FRAME_A and H2_CS_FRAME_E here.
3050 * H2_CS_FRAME_P indicates an incomplete previous operation
3051 * (most often the first attempt) and requires some validity
3052 * checks for the frame and the current state. The two other
3053 * ones are set after completion (or abortion) and must skip
3054 * validity checks.
3055 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003056 tmp_h2s = h2c_st_by_id(h2c, h2c->dsi);
3057
Willy Tarreau567beb82018-12-18 16:52:44 +01003058 if (tmp_h2s != h2s && h2s && h2s->cs &&
3059 (b_data(&h2s->rxbuf) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003060 conn_xprt_read0_pending(h2c->conn) ||
3061 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003062 (h2s->flags & H2_SF_ES_RCVD) ||
3063 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003064 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003065 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 +01003066 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003067 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003068 }
3069 h2s = tmp_h2s;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003070
Willy Tarreau63864812019-08-07 14:25:20 +02003071 if (h2c->st0 == H2_CS_FRAME_E ||
Willy Tarreau7838a792019-08-12 18:42:03 +02003072 (h2c->st0 == H2_CS_FRAME_P && !h2_frame_check_vs_state(h2c, h2s))) {
3073 TRACE_PROTO("stream error reported", H2_EV_RX_FRAME|H2_EV_PROTO_ERR, h2c->conn, h2s);
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003074 goto strm_err;
Willy Tarreau7838a792019-08-12 18:42:03 +02003075 }
Willy Tarreauc0da1962017-10-30 18:38:00 +01003076
Willy Tarreau7e98c052017-10-10 15:56:59 +02003077 switch (h2c->dft) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02003078 case H2_FT_SETTINGS:
Willy Tarreau7838a792019-08-12 18:42:03 +02003079 if (h2c->st0 == H2_CS_FRAME_P) {
3080 TRACE_PROTO("receiving H2 SETTINGS frame", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn, h2s);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003081 ret = h2c_handle_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003082 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003083
Willy Tarreau7838a792019-08-12 18:42:03 +02003084 if (h2c->st0 == H2_CS_FRAME_A) {
3085 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 +02003086 ret = h2c_ack_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003087 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003088 break;
3089
Willy Tarreaucf68c782017-10-10 17:11:41 +02003090 case H2_FT_PING:
Willy Tarreau7838a792019-08-12 18:42:03 +02003091 if (h2c->st0 == H2_CS_FRAME_P) {
3092 TRACE_PROTO("receiving H2 PING frame", H2_EV_RX_FRAME|H2_EV_RX_PING, h2c->conn, h2s);
Willy Tarreaucf68c782017-10-10 17:11:41 +02003093 ret = h2c_handle_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003094 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003095
Willy Tarreau7838a792019-08-12 18:42:03 +02003096 if (h2c->st0 == H2_CS_FRAME_A) {
3097 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 +02003098 ret = h2c_ack_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003099 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003100 break;
3101
Willy Tarreau26f95952017-07-27 17:18:30 +02003102 case H2_FT_WINDOW_UPDATE:
Willy Tarreau7838a792019-08-12 18:42:03 +02003103 if (h2c->st0 == H2_CS_FRAME_P) {
3104 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 +02003105 ret = h2c_handle_window_update(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003106 }
Willy Tarreau26f95952017-07-27 17:18:30 +02003107 break;
3108
Willy Tarreau61290ec2017-10-17 08:19:21 +02003109 case H2_FT_CONTINUATION:
Willy Tarreauea18f862018-12-22 20:19:26 +01003110 /* RFC7540#6.10: CONTINUATION may only be preceeded by
3111 * a HEADERS/PUSH_PROMISE/CONTINUATION frame. These
3112 * frames' parsers consume all following CONTINUATION
3113 * frames so this one is out of sequence.
Willy Tarreau61290ec2017-10-17 08:19:21 +02003114 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003115 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 +01003116 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003117 if (!(h2c->flags & H2_CF_IS_BACK))
3118 sess_log(h2c->conn->owner);
Willy Tarreauea18f862018-12-22 20:19:26 +01003119 goto fail;
Willy Tarreau61290ec2017-10-17 08:19:21 +02003120
Willy Tarreau13278b42017-10-13 19:23:14 +02003121 case H2_FT_HEADERS:
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003122 if (h2c->st0 == H2_CS_FRAME_P) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003123 TRACE_PROTO("receiving H2 HEADERS frame", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02003124 if (h2c->flags & H2_CF_IS_BACK)
3125 tmp_h2s = h2c_bck_handle_headers(h2c, h2s);
3126 else
3127 tmp_h2s = h2c_frt_handle_headers(h2c, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003128 if (tmp_h2s) {
3129 h2s = tmp_h2s;
3130 ret = 1;
3131 }
3132 }
Willy Tarreau13278b42017-10-13 19:23:14 +02003133 break;
3134
Willy Tarreau454f9052017-10-26 19:40:35 +02003135 case H2_FT_DATA:
Willy Tarreau7838a792019-08-12 18:42:03 +02003136 if (h2c->st0 == H2_CS_FRAME_P) {
3137 TRACE_PROTO("receiving H2 DATA frame", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02003138 ret = h2c_frt_handle_data(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003139 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003140
Willy Tarreau7838a792019-08-12 18:42:03 +02003141 if (h2c->st0 == H2_CS_FRAME_A) {
3142 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 +02003143 ret = h2c_send_strm_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003144 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003145 break;
Willy Tarreaucd234e92017-08-18 10:59:39 +02003146
Willy Tarreau92153fc2017-12-03 19:46:19 +01003147 case H2_FT_PRIORITY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003148 if (h2c->st0 == H2_CS_FRAME_P) {
3149 TRACE_PROTO("receiving H2 PRIORITY frame", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn, h2s);
Willy Tarreau92153fc2017-12-03 19:46:19 +01003150 ret = h2c_handle_priority(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003151 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01003152 break;
3153
Willy Tarreaucd234e92017-08-18 10:59:39 +02003154 case H2_FT_RST_STREAM:
Willy Tarreau7838a792019-08-12 18:42:03 +02003155 if (h2c->st0 == H2_CS_FRAME_P) {
3156 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 +02003157 ret = h2c_handle_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003158 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02003159 break;
3160
Willy Tarreaue96b0922017-10-30 00:28:29 +01003161 case H2_FT_GOAWAY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003162 if (h2c->st0 == H2_CS_FRAME_P) {
3163 TRACE_PROTO("receiving H2 GOAWAY frame", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn, h2s);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003164 ret = h2c_handle_goaway(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003165 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01003166 break;
3167
Willy Tarreau1c661982017-10-30 13:52:01 +01003168 /* implement all extra frame types here */
Willy Tarreau7e98c052017-10-10 15:56:59 +02003169 default:
Willy Tarreau7838a792019-08-12 18:42:03 +02003170 TRACE_PROTO("receiving H2 ignored frame", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003171 /* drop frames that we ignore. They may be larger than
3172 * the buffer so we drain all of their contents until
3173 * we reach the end.
3174 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003175 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3176 b_del(&h2c->dbuf, ret);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003177 h2c->dfl -= ret;
3178 ret = h2c->dfl == 0;
3179 }
3180
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003181 strm_err:
Willy Tarreaua20a5192017-12-27 11:02:06 +01003182 /* We may have to send an RST if not done yet */
Willy Tarreau7838a792019-08-12 18:42:03 +02003183 if (h2s->st == H2_SS_ERROR) {
3184 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 +01003185 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003186 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003187
Willy Tarreau7838a792019-08-12 18:42:03 +02003188 if (h2c->st0 == H2_CS_FRAME_E) {
3189 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 +01003190 ret = h2c_send_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003191 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003192
Willy Tarreau7e98c052017-10-10 15:56:59 +02003193 /* error or missing data condition met above ? */
Willy Tarreau7838a792019-08-12 18:42:03 +02003194 if (ret <= 0) {
3195 TRACE_DEVEL("insufficient data to proceed", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003196 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003197 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003198
3199 if (h2c->st0 != H2_CS_FRAME_H) {
Christopher Faulet5112a602019-09-26 16:38:28 +02003200 TRACE_DEVEL("stream error, skip frame payload", H2_EV_RX_FRAME, h2c->conn, h2s);
3201 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3202 b_del(&h2c->dbuf, ret);
3203 h2c->dfl -= ret;
3204 if (!h2c->dfl) {
3205 TRACE_STATE("switching to FRAME_H", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
3206 h2c->st0 = H2_CS_FRAME_H;
3207 h2c->dsi = -1;
3208 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003209 }
3210 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003211
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003212 if (h2c->rcvd_c > 0 &&
Willy Tarreau7838a792019-08-12 18:42:03 +02003213 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))) {
3214 TRACE_PROTO("sending H2 WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003215 h2c_send_conn_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003216 }
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003217
Willy Tarreau52eed752017-09-22 15:05:09 +02003218 fail:
3219 /* we can go here on missing data, blocked response or error */
Willy Tarreau567beb82018-12-18 16:52:44 +01003220 if (h2s && h2s->cs &&
3221 (b_data(&h2s->rxbuf) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003222 conn_xprt_read0_pending(h2c->conn) ||
3223 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003224 (h2s->flags & H2_SF_ES_RCVD) ||
3225 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003226 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003227 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 +01003228 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003229 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003230 }
Willy Tarreau1ed87b72018-11-25 08:45:16 +01003231
Willy Tarreau7838a792019-08-12 18:42:03 +02003232 if (old_iw != h2c->miw) {
3233 TRACE_STATE("notifying streams about SFCTL increase", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003234 h2c_unblock_sfctl(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003235 }
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003236
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003237 h2c_restart_reading(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02003238 out:
3239 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreaubc933932017-10-09 16:21:43 +02003240}
3241
3242/* process Tx frames from streams to be multiplexed. Returns > 0 if it reached
3243 * the end.
3244 */
3245static int h2_process_mux(struct h2c *h2c)
3246{
Olivier Houchard998410a2019-04-15 19:23:37 +02003247 struct h2s *h2s, *h2s_back;
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003248
Willy Tarreau7838a792019-08-12 18:42:03 +02003249 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3250
Willy Tarreau01b44822018-10-03 14:26:37 +02003251 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3252 if (unlikely(h2c->st0 == H2_CS_PREFACE && (h2c->flags & H2_CF_IS_BACK))) {
3253 if (unlikely(h2c_bck_send_preface(h2c) <= 0)) {
3254 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003255 if (h2c->st0 == H2_CS_ERROR)
Willy Tarreau01b44822018-10-03 14:26:37 +02003256 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau01b44822018-10-03 14:26:37 +02003257 goto fail;
3258 }
3259 h2c->st0 = H2_CS_SETTINGS1;
3260 }
3261 /* need to wait for the other side */
Willy Tarreau75a930a2018-12-12 08:03:58 +01003262 if (h2c->st0 < H2_CS_FRAME_H)
Willy Tarreau7838a792019-08-12 18:42:03 +02003263 goto done;
Willy Tarreau01b44822018-10-03 14:26:37 +02003264 }
3265
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003266 /* start by sending possibly pending window updates */
Willy Tarreaue74679a2019-08-06 15:39:32 +02003267 if (h2c->rcvd_s > 0 &&
3268 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3269 h2c_send_strm_wu(h2c) < 0)
3270 goto fail;
3271
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003272 if (h2c->rcvd_c > 0 &&
3273 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3274 h2c_send_conn_wu(h2c) < 0)
3275 goto fail;
3276
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003277 /* First we always process the flow control list because the streams
3278 * waiting there were already elected for immediate emission but were
3279 * blocked just on this.
3280 */
3281
Olivier Houchard998410a2019-04-15 19:23:37 +02003282 list_for_each_entry_safe(h2s, h2s_back, &h2c->fctl_list, list) {
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003283 if (h2c->mws <= 0 || h2c->flags & H2_CF_MUX_BLOCK_ANY ||
3284 h2c->st0 >= H2_CS_ERROR)
3285 break;
Olivier Houchard998410a2019-04-15 19:23:37 +02003286
Willy Tarreauc234ae32019-05-13 17:56:11 +02003287 if (LIST_ADDED(&h2s->sending_list))
Olivier Houchardd360ac62019-03-22 17:37:16 +01003288 continue;
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003289
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003290 h2s->flags &= ~H2_SF_BLK_ANY;
Olivier Houchard998410a2019-04-15 19:23:37 +02003291 /* For some reason, the upper layer failed to subsribe again,
3292 * so remove it from the send_list
3293 */
3294 if (!h2s->send_wait) {
3295 LIST_DEL_INIT(&h2s->list);
3296 continue;
3297 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003298 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Olivier Houchardd360ac62019-03-22 17:37:16 +01003299 LIST_ADDQ(&h2c->sending_list, &h2s->sending_list);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003300 tasklet_wakeup(h2s->send_wait->tasklet);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003301 }
3302
Olivier Houchard998410a2019-04-15 19:23:37 +02003303 list_for_each_entry_safe(h2s, h2s_back, &h2c->send_list, list) {
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003304 if (h2c->st0 >= H2_CS_ERROR || h2c->flags & H2_CF_MUX_BLOCK_ANY)
3305 break;
Olivier Houchard998410a2019-04-15 19:23:37 +02003306
Willy Tarreauc234ae32019-05-13 17:56:11 +02003307 if (LIST_ADDED(&h2s->sending_list))
Olivier Houchardd360ac62019-03-22 17:37:16 +01003308 continue;
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003309
Olivier Houchard998410a2019-04-15 19:23:37 +02003310 /* For some reason, the upper layer failed to subsribe again,
3311 * so remove it from the send_list
3312 */
3313 if (!h2s->send_wait) {
3314 LIST_DEL_INIT(&h2s->list);
3315 continue;
3316 }
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003317 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003318 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Olivier Houchardd360ac62019-03-22 17:37:16 +01003319 LIST_ADDQ(&h2c->sending_list, &h2s->sending_list);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003320 tasklet_wakeup(h2s->send_wait->tasklet);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003321 }
3322
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003323 fail:
Willy Tarreau3eabe9b2017-11-07 11:03:01 +01003324 if (unlikely(h2c->st0 >= H2_CS_ERROR)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02003325 if (h2c->st0 == H2_CS_ERROR) {
3326 if (h2c->max_id >= 0) {
3327 h2c_send_goaway_error(h2c, NULL);
3328 if (h2c->flags & H2_CF_MUX_BLOCK_ANY)
Willy Tarreau7838a792019-08-12 18:42:03 +02003329 goto out0;
Willy Tarreau081d4722017-05-16 21:51:05 +02003330 }
3331
3332 h2c->st0 = H2_CS_ERROR2; // sent (or failed hard) !
3333 }
Willy Tarreau081d4722017-05-16 21:51:05 +02003334 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003335 done:
3336 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
3337 return 1;
3338 out0:
3339 TRACE_DEVEL("leaving in blocked situation", H2_EV_H2C_WAKE, h2c->conn);
3340 return 0;
Willy Tarreaubc933932017-10-09 16:21:43 +02003341}
3342
Willy Tarreau62f52692017-10-08 23:01:42 +02003343
Willy Tarreau479998a2018-11-18 06:30:59 +01003344/* Attempt to read data, and subscribe if none available.
3345 * The function returns 1 if data has been received, otherwise zero.
3346 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003347static int h2_recv(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003348{
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003349 struct connection *conn = h2c->conn;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003350 struct buffer *buf;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003351 int max;
Olivier Houchard7505f942018-08-21 18:10:44 +02003352 size_t ret;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003353
Willy Tarreau7838a792019-08-12 18:42:03 +02003354 TRACE_ENTER(H2_EV_H2C_RECV, h2c->conn);
3355
3356 if (h2c->wait_event.events & SUB_RETRY_RECV) {
3357 TRACE_DEVEL("leaving on sub_recv", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003358 return (b_data(&h2c->dbuf));
Willy Tarreau7838a792019-08-12 18:42:03 +02003359 }
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003360
Willy Tarreau7838a792019-08-12 18:42:03 +02003361 if (!h2_recv_allowed(h2c)) {
3362 TRACE_DEVEL("leaving on !recv_allowed", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003363 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003364 }
Willy Tarreaua2af5122017-10-09 11:56:46 +02003365
Willy Tarreau44e973f2018-03-01 17:49:30 +01003366 buf = h2_get_buf(h2c, &h2c->dbuf);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003367 if (!buf) {
3368 h2c->flags |= H2_CF_DEM_DALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02003369 TRACE_DEVEL("leaving on !alloc", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003370 return 0;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003371 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003372
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003373 b_realign_if_empty(buf);
3374 if (!b_data(buf)) {
3375 /* try to pre-align the buffer like the
3376 * rxbufs will be to optimize memory copies. We'll make
3377 * sure that the frame header lands at the end of the
3378 * HTX block to alias it upon recv. We cannot use the
3379 * head because rcv_buf() will realign the buffer if
3380 * it's empty. Thus we cheat and pretend we already
3381 * have a few bytes there.
3382 */
3383 max = buf_room_for_htx_data(buf) + 9;
3384 buf->head = sizeof(struct htx) - 9;
3385 }
3386 else
3387 max = b_room(buf);
Willy Tarreau2a59e872018-12-12 08:23:47 +01003388
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003389 ret = max ? conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0) : 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003390
Willy Tarreau7838a792019-08-12 18:42:03 +02003391 if (max && !ret && h2_recv_allowed(h2c)) {
3392 TRACE_DATA("failed to receive data, subscribing", H2_EV_H2C_RECV, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003393 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003394 } else if (ret)
3395 TRACE_DATA("received data", H2_EV_H2C_RECV, h2c->conn,,, (void*)(long)ret);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003396
Olivier Houcharda1411e62018-08-17 18:42:48 +02003397 if (!b_data(buf)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +01003398 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02003399 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard46677732018-11-29 17:06:17 +01003400 return (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003401 }
3402
Willy Tarreau7838a792019-08-12 18:42:03 +02003403 if (b_data(buf) == buf->size) {
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003404 h2c->flags |= H2_CF_DEM_DFULL;
Willy Tarreau35fb8462019-10-02 11:05:46 +02003405 TRACE_STATE("demux buffer full", H2_EV_H2C_RECV|H2_EV_H2C_BLK, h2c->conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003406 }
3407
3408 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003409 return !!ret || (conn->flags & CO_FL_ERROR) || conn_xprt_read0_pending(conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003410}
3411
Willy Tarreau479998a2018-11-18 06:30:59 +01003412/* Try to send data if possible.
3413 * The function returns 1 if data have been sent, otherwise zero.
3414 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003415static int h2_send(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003416{
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003417 struct connection *conn = h2c->conn;
Willy Tarreaubc933932017-10-09 16:21:43 +02003418 int done;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003419 int sent = 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003420
Willy Tarreau7838a792019-08-12 18:42:03 +02003421 TRACE_ENTER(H2_EV_H2C_SEND, h2c->conn);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003422
Willy Tarreau7838a792019-08-12 18:42:03 +02003423 if (conn->flags & CO_FL_ERROR) {
3424 TRACE_DEVEL("leaving on error", H2_EV_H2C_SEND, h2c->conn);
3425 return 1;
3426 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003427
Willy Tarreaua2af5122017-10-09 11:56:46 +02003428 if (conn->flags & (CO_FL_HANDSHAKE|CO_FL_WAIT_L4_CONN|CO_FL_WAIT_L6_CONN)) {
3429 /* a handshake was requested */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003430 goto schedule;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003431 }
3432
Willy Tarreaubc933932017-10-09 16:21:43 +02003433 /* This loop is quite simple : it tries to fill as much as it can from
3434 * pending streams into the existing buffer until it's reportedly full
3435 * or the end of send requests is reached. Then it tries to send this
3436 * buffer's contents out, marks it not full if at least one byte could
3437 * be sent, and tries again.
3438 *
3439 * The snd_buf() function normally takes a "flags" argument which may
3440 * be made of a combination of CO_SFL_MSG_MORE to indicate that more
3441 * data immediately comes and CO_SFL_STREAMER to indicate that the
3442 * connection is streaming lots of data (used to increase TLS record
3443 * size at the expense of latency). The former can be sent any time
3444 * there's a buffer full flag, as it indicates at least one stream
3445 * attempted to send and failed so there are pending data. An
3446 * alternative would be to set it as long as there's an active stream
3447 * but that would be problematic for ACKs until we have an absolute
3448 * guarantee that all waiters have at least one byte to send. The
3449 * latter should possibly not be set for now.
3450 */
3451
3452 done = 0;
3453 while (!done) {
3454 unsigned int flags = 0;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003455 unsigned int released = 0;
3456 struct buffer *buf;
Willy Tarreaubc933932017-10-09 16:21:43 +02003457
3458 /* fill as much as we can into the current buffer */
3459 while (((h2c->flags & (H2_CF_MUX_MFULL|H2_CF_MUX_MALLOC)) == 0) && !done)
3460 done = h2_process_mux(h2c);
3461
Olivier Houchard2b094432019-01-29 18:28:36 +01003462 if (h2c->flags & H2_CF_MUX_MALLOC)
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003463 done = 1; // we won't go further without extra buffers
Olivier Houchard2b094432019-01-29 18:28:36 +01003464
Willy Tarreaubc933932017-10-09 16:21:43 +02003465 if (conn->flags & CO_FL_ERROR)
3466 break;
3467
3468 if (h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))
3469 flags |= CO_SFL_MSG_MORE;
3470
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003471 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3472 if (b_data(buf)) {
3473 int ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, buf, b_data(buf), flags);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003474 if (!ret) {
3475 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003476 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003477 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003478 sent = 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003479 TRACE_DATA("sent data", H2_EV_H2C_SEND, h2c->conn,, buf, (void*)(long)ret);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003480 b_del(buf, ret);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003481 if (b_data(buf)) {
3482 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003483 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003484 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003485 }
3486 b_free(buf);
3487 released++;
Willy Tarreau787db9a2018-06-14 18:31:46 +02003488 }
Willy Tarreaubc933932017-10-09 16:21:43 +02003489
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003490 if (released)
Willy Tarreau201840a2019-05-29 17:50:48 +02003491 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003492
Willy Tarreaubc933932017-10-09 16:21:43 +02003493 /* wrote at least one byte, the buffer is not full anymore */
Christopher Faulet69fe5ce2019-10-24 10:31:01 +02003494 if (sent)
3495 h2c->flags &= ~(H2_CF_MUX_MFULL | H2_CF_DEM_MROOM);
Willy Tarreaubc933932017-10-09 16:21:43 +02003496 }
3497
Willy Tarreaua2af5122017-10-09 11:56:46 +02003498 if (conn->flags & CO_FL_SOCK_WR_SH) {
3499 /* output closed, nothing to send, clear the buffer to release it */
Willy Tarreau51330962019-05-26 09:38:07 +02003500 b_reset(br_tail(h2c->mbuf));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003501 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02003502 /* We're not full anymore, so we can wake any task that are waiting
3503 * for us.
3504 */
Willy Tarreaucec60052019-09-25 07:57:31 +02003505 if (!(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM)) && h2c->st0 >= H2_CS_FRAME_H) {
Olivier Houchardd360ac62019-03-22 17:37:16 +01003506 struct h2s *h2s;
3507
3508 list_for_each_entry(h2s, &h2c->send_list, list) {
3509 if (h2c->st0 >= H2_CS_ERROR || h2c->flags & H2_CF_MUX_BLOCK_ANY)
3510 break;
Olivier Houchard998410a2019-04-15 19:23:37 +02003511
Willy Tarreauc234ae32019-05-13 17:56:11 +02003512 if (LIST_ADDED(&h2s->sending_list))
Olivier Houchardd360ac62019-03-22 17:37:16 +01003513 continue;
3514
Olivier Houchard998410a2019-04-15 19:23:37 +02003515 /* For some reason, the upper layer failed to subsribe again,
3516 * so remove it from the send_list
3517 */
3518 if (!h2s->send_wait) {
3519 LIST_DEL_INIT(&h2s->list);
3520 continue;
3521 }
Olivier Houchardd360ac62019-03-22 17:37:16 +01003522 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003523 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Willy Tarreau7838a792019-08-12 18:42:03 +02003524 TRACE_DEVEL("waking up pending stream", H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn, h2s);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003525 tasklet_wakeup(h2s->send_wait->tasklet);
Olivier Houchardd360ac62019-03-22 17:37:16 +01003526 LIST_ADDQ(&h2c->sending_list, &h2s->sending_list);
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02003527 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02003528 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003529 /* We're done, no more to send */
Willy Tarreau7838a792019-08-12 18:42:03 +02003530 if (!br_data(h2c->mbuf)) {
3531 TRACE_DEVEL("leaving with everything sent", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003532 return sent;
Willy Tarreau7838a792019-08-12 18:42:03 +02003533 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003534schedule:
Willy Tarreau7838a792019-08-12 18:42:03 +02003535 if (!(conn->flags & CO_FL_ERROR) && !(h2c->wait_event.events & SUB_RETRY_SEND)) {
3536 TRACE_STATE("more data to send, subscribing", H2_EV_H2C_SEND, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003537 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003538 }
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003539
Willy Tarreau7838a792019-08-12 18:42:03 +02003540 TRACE_DEVEL("leaving with some data left to send", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003541 return sent;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003542}
3543
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003544/* this is the tasklet referenced in h2c->wait_event.tasklet */
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003545static struct task *h2_io_cb(struct task *t, void *ctx, unsigned short status)
3546{
3547 struct h2c *h2c = ctx;
Olivier Houchard7505f942018-08-21 18:10:44 +02003548 int ret = 0;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003549
Willy Tarreau7838a792019-08-12 18:42:03 +02003550 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3551
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003552 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchard7505f942018-08-21 18:10:44 +02003553 ret = h2_send(h2c);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003554 if (!(h2c->wait_event.events & SUB_RETRY_RECV))
Olivier Houchard7505f942018-08-21 18:10:44 +02003555 ret |= h2_recv(h2c);
Willy Tarreaucef5c8e2018-12-18 10:29:54 +01003556 if (ret || b_data(&h2c->dbuf))
Olivier Houchard7505f942018-08-21 18:10:44 +02003557 h2_process(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003558
3559 TRACE_LEAVE(H2_EV_H2C_WAKE);
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003560 return NULL;
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003561}
Willy Tarreaua2af5122017-10-09 11:56:46 +02003562
Willy Tarreau62f52692017-10-08 23:01:42 +02003563/* callback called on any event by the connection handler.
3564 * It applies changes and returns zero, or < 0 if it wants immediate
3565 * destruction of the connection (which normally doesn not happen in h2).
3566 */
Olivier Houchard7505f942018-08-21 18:10:44 +02003567static int h2_process(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003568{
Olivier Houchard7505f942018-08-21 18:10:44 +02003569 struct connection *conn = h2c->conn;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003570
Willy Tarreau7838a792019-08-12 18:42:03 +02003571 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3572
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003573 if (b_data(&h2c->dbuf) && !(h2c->flags & H2_CF_DEM_BLOCK_ANY)) {
Willy Tarreaud13bf272017-12-14 10:34:52 +01003574 h2_process_demux(h2c);
3575
3576 if (h2c->st0 >= H2_CS_ERROR || conn->flags & CO_FL_ERROR)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003577 b_reset(&h2c->dbuf);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003578
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003579 if (!b_full(&h2c->dbuf))
Willy Tarreaud13bf272017-12-14 10:34:52 +01003580 h2c->flags &= ~H2_CF_DEM_DFULL;
3581 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003582 h2_send(h2c);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003583
Willy Tarreau0b37d652018-10-03 10:33:02 +02003584 if (unlikely(h2c->proxy->state == PR_STSTOPPED)) {
Willy Tarreau8ec14062017-12-30 18:08:13 +01003585 /* frontend is stopping, reload likely in progress, let's try
3586 * to announce a graceful shutdown if not yet done. We don't
3587 * care if it fails, it will be tried again later.
3588 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003589 TRACE_STATE("proxy stopped, sending GOAWAY", H2_EV_H2C_WAKE|H2_EV_TX_FRAME, conn);
Willy Tarreau8ec14062017-12-30 18:08:13 +01003590 if (!(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
3591 if (h2c->last_sid < 0)
3592 h2c->last_sid = (1U << 31) - 1;
3593 h2c_send_goaway_error(h2c, NULL);
3594 }
3595 }
3596
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003597 /*
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003598 * If we received early data, and the handshake is done, wake
3599 * any stream that was waiting for it.
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003600 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003601 if (!(h2c->flags & H2_CF_WAIT_FOR_HS) &&
3602 (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_HANDSHAKE | CO_FL_EARLY_DATA)) == CO_FL_EARLY_DATA) {
3603 struct eb32_node *node;
3604 struct h2s *h2s;
3605
3606 h2c->flags |= H2_CF_WAIT_FOR_HS;
3607 node = eb32_lookup_ge(&h2c->streams_by_id, 1);
3608
3609 while (node) {
3610 h2s = container_of(node, struct h2s, by_id);
Willy Tarreaufde287c2018-12-19 18:33:16 +01003611 if (h2s->cs && h2s->cs->flags & CS_FL_WAIT_FOR_HS)
Willy Tarreau7e094452018-12-19 18:08:52 +01003612 h2s_notify_recv(h2s);
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003613 node = eb32_next(node);
3614 }
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003615 }
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003616
Willy Tarreau26bd7612017-10-09 16:47:04 +02003617 if (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn) ||
Willy Tarreau29a98242017-10-31 06:59:15 +01003618 h2c->st0 == H2_CS_ERROR2 || h2c->flags & H2_CF_GOAWAY_FAILED ||
3619 (eb_is_empty(&h2c->streams_by_id) && h2c->last_sid >= 0 &&
3620 h2c->max_id >= h2c->last_sid)) {
Willy Tarreau23482912019-05-07 15:23:14 +02003621 h2_wake_some_streams(h2c, 0);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003622
3623 if (eb_is_empty(&h2c->streams_by_id)) {
3624 /* no more stream, kill the connection now */
Christopher Faulet73c12072019-04-08 11:23:22 +02003625 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003626 TRACE_DEVEL("leaving after releasing the connection", H2_EV_H2C_WAKE);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003627 return -1;
3628 }
Willy Tarreau4481e262019-10-31 15:36:30 +01003629
3630 /* connections in error must be removed from the idle lists */
3631 HA_SPIN_LOCK(OTHER_LOCK, &toremove_lock[tid]);
3632 MT_LIST_DEL((struct mt_list *)&conn->list);
3633 HA_SPIN_UNLOCK(OTHER_LOCK, &toremove_lock[tid]);
3634 }
3635 else if (h2c->st0 == H2_CS_ERROR) {
3636 /* connections in error must be removed from the idle lists */
3637 HA_SPIN_LOCK(OTHER_LOCK, &toremove_lock[tid]);
3638 MT_LIST_DEL((struct mt_list *)&conn->list);
3639 HA_SPIN_UNLOCK(OTHER_LOCK, &toremove_lock[tid]);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003640 }
3641
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003642 if (!b_data(&h2c->dbuf))
Willy Tarreau44e973f2018-03-01 17:49:30 +01003643 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003644
Olivier Houchard53216e72018-10-10 15:46:36 +02003645 if ((conn->flags & CO_FL_SOCK_WR_SH) ||
3646 h2c->st0 == H2_CS_ERROR2 || (h2c->flags & H2_CF_GOAWAY_FAILED) ||
3647 (h2c->st0 != H2_CS_ERROR &&
Willy Tarreau662fafc2019-05-26 09:43:07 +02003648 !br_data(h2c->mbuf) &&
Olivier Houchard53216e72018-10-10 15:46:36 +02003649 (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) &&
3650 ((h2c->flags & H2_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&h2c->send_list))))
Willy Tarreau2e3c0002019-05-26 09:45:23 +02003651 h2_release_mbuf(h2c);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003652
Willy Tarreau3f133572017-10-31 19:21:06 +01003653 if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02003654 if (h2c_may_expire(h2c))
3655 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
3656 else
3657 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02003658 task_queue(h2c->task);
Willy Tarreauea392822017-10-31 10:02:25 +01003659 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003660
Olivier Houchard7505f942018-08-21 18:10:44 +02003661 h2_send(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003662 TRACE_LEAVE(H2_EV_H2C_WAKE, conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003663 return 0;
3664}
3665
Willy Tarreau749f5ca2019-03-21 19:19:36 +01003666/* wake-up function called by the connection layer (mux_ops.wake) */
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003667static int h2_wake(struct connection *conn)
3668{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003669 struct h2c *h2c = conn->ctx;
Willy Tarreau7838a792019-08-12 18:42:03 +02003670 int ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003671
Willy Tarreau7838a792019-08-12 18:42:03 +02003672 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3673 ret = h2_process(h2c);
3674 TRACE_LEAVE(H2_EV_H2C_WAKE);
3675 return ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003676}
3677
Willy Tarreauea392822017-10-31 10:02:25 +01003678/* Connection timeout management. The principle is that if there's no receipt
3679 * nor sending for a certain amount of time, the connection is closed. If the
3680 * MUX buffer still has lying data or is not allocatable, the connection is
3681 * immediately killed. If it's allocatable and empty, we attempt to send a
3682 * GOAWAY frame.
3683 */
Olivier Houchard9f6af332018-05-25 14:04:04 +02003684static struct task *h2_timeout_task(struct task *t, void *context, unsigned short state)
Willy Tarreauea392822017-10-31 10:02:25 +01003685{
Olivier Houchard9f6af332018-05-25 14:04:04 +02003686 struct h2c *h2c = context;
Willy Tarreauea392822017-10-31 10:02:25 +01003687 int expired = tick_is_expired(t->expire, now_ms);
3688
Willy Tarreau7838a792019-08-12 18:42:03 +02003689 TRACE_ENTER(H2_EV_H2C_WAKE, h2c ? h2c->conn : NULL);
3690
3691 if (!expired && h2c) {
3692 TRACE_DEVEL("leaving (not expired)", H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreauea392822017-10-31 10:02:25 +01003693 return t;
Willy Tarreau7838a792019-08-12 18:42:03 +02003694 }
Willy Tarreauea392822017-10-31 10:02:25 +01003695
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02003696 if (h2c && !h2c_may_expire(h2c)) {
3697 /* we do still have streams but all of them are idle, waiting
3698 * for the data layer, so we must not enforce the timeout here.
3699 */
3700 t->expire = TICK_ETERNITY;
3701 return t;
3702 }
3703
Olivier Houchard3f795f72019-04-17 22:51:06 +02003704 task_destroy(t);
Willy Tarreau0975f112018-03-29 15:22:59 +02003705
3706 if (!h2c) {
3707 /* resources were already deleted */
Willy Tarreau7838a792019-08-12 18:42:03 +02003708 TRACE_DEVEL("leaving (not more h2c)", H2_EV_H2C_WAKE);
Willy Tarreau0975f112018-03-29 15:22:59 +02003709 return NULL;
3710 }
3711
3712 h2c->task = NULL;
Willy Tarreauea392822017-10-31 10:02:25 +01003713 h2c_error(h2c, H2_ERR_NO_ERROR);
Willy Tarreau23482912019-05-07 15:23:14 +02003714 h2_wake_some_streams(h2c, 0);
Willy Tarreauea392822017-10-31 10:02:25 +01003715
Willy Tarreau662fafc2019-05-26 09:43:07 +02003716 if (br_data(h2c->mbuf)) {
Willy Tarreauea392822017-10-31 10:02:25 +01003717 /* don't even try to send a GOAWAY, the buffer is stuck */
3718 h2c->flags |= H2_CF_GOAWAY_FAILED;
3719 }
3720
3721 /* try to send but no need to insist */
Willy Tarreau599391a2017-11-24 10:16:00 +01003722 h2c->last_sid = h2c->max_id;
Willy Tarreauea392822017-10-31 10:02:25 +01003723 if (h2c_send_goaway_error(h2c, NULL) <= 0)
3724 h2c->flags |= H2_CF_GOAWAY_FAILED;
3725
Willy Tarreau662fafc2019-05-26 09:43:07 +02003726 if (br_data(h2c->mbuf) && !(h2c->flags & H2_CF_GOAWAY_FAILED) && conn_xprt_ready(h2c->conn)) {
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003727 unsigned int released = 0;
3728 struct buffer *buf;
3729
3730 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3731 if (b_data(buf)) {
3732 int ret = h2c->conn->xprt->snd_buf(h2c->conn, h2c->conn->xprt_ctx, buf, b_data(buf), 0);
3733 if (!ret)
3734 break;
3735 b_del(buf, ret);
3736 if (b_data(buf))
3737 break;
3738 b_free(buf);
3739 released++;
3740 }
Willy Tarreau787db9a2018-06-14 18:31:46 +02003741 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003742
3743 if (released)
Willy Tarreau201840a2019-05-29 17:50:48 +02003744 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau787db9a2018-06-14 18:31:46 +02003745 }
Willy Tarreauea392822017-10-31 10:02:25 +01003746
Willy Tarreau4481e262019-10-31 15:36:30 +01003747 /* in any case this connection must not be considered idle anymore */
3748 HA_SPIN_LOCK(OTHER_LOCK, &toremove_lock[tid]);
3749 MT_LIST_DEL((struct mt_list *)&h2c->conn->list);
3750 HA_SPIN_UNLOCK(OTHER_LOCK, &toremove_lock[tid]);
3751
Willy Tarreau0975f112018-03-29 15:22:59 +02003752 /* either we can release everything now or it will be done later once
3753 * the last stream closes.
3754 */
3755 if (eb_is_empty(&h2c->streams_by_id))
Christopher Faulet73c12072019-04-08 11:23:22 +02003756 h2_release(h2c);
Willy Tarreauea392822017-10-31 10:02:25 +01003757
Willy Tarreau7838a792019-08-12 18:42:03 +02003758 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreauea392822017-10-31 10:02:25 +01003759 return NULL;
3760}
3761
3762
Willy Tarreau62f52692017-10-08 23:01:42 +02003763/*******************************************/
3764/* functions below are used by the streams */
3765/*******************************************/
3766
3767/*
3768 * Attach a new stream to a connection
3769 * (Used for outgoing connections)
3770 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01003771static struct conn_stream *h2_attach(struct connection *conn, struct session *sess)
Willy Tarreau62f52692017-10-08 23:01:42 +02003772{
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003773 struct conn_stream *cs;
3774 struct h2s *h2s;
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003775 struct h2c *h2c = conn->ctx;
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003776
Willy Tarreau7838a792019-08-12 18:42:03 +02003777 TRACE_ENTER(H2_EV_H2S_NEW, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003778 cs = cs_new(conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003779 if (!cs) {
3780 TRACE_DEVEL("leaving on CS allocation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003781 return NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02003782 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01003783 h2s = h2c_bck_stream_new(h2c, cs, sess);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003784 if (!h2s) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003785 TRACE_DEVEL("leaving on stream creation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003786 cs_free(cs);
3787 return NULL;
3788 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003789 TRACE_LEAVE(H2_EV_H2S_NEW, conn, h2s);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003790 return cs;
Willy Tarreau62f52692017-10-08 23:01:42 +02003791}
3792
Willy Tarreaufafd3982018-11-18 21:29:20 +01003793/* Retrieves the first valid conn_stream from this connection, or returns NULL.
3794 * We have to scan because we may have some orphan streams. It might be
3795 * beneficial to scan backwards from the end to reduce the likeliness to find
3796 * orphans.
3797 */
3798static const struct conn_stream *h2_get_first_cs(const struct connection *conn)
3799{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003800 struct h2c *h2c = conn->ctx;
Willy Tarreaufafd3982018-11-18 21:29:20 +01003801 struct h2s *h2s;
3802 struct eb32_node *node;
3803
3804 node = eb32_first(&h2c->streams_by_id);
3805 while (node) {
3806 h2s = container_of(node, struct h2s, by_id);
3807 if (h2s->cs)
3808 return h2s->cs;
3809 node = eb32_next(node);
3810 }
3811 return NULL;
3812}
3813
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02003814static int h2_ctl(struct connection *conn, enum mux_ctl_type mux_ctl, void *output)
3815{
3816 int ret = 0;
3817 struct h2c *h2c = conn->ctx;
3818
3819 switch (mux_ctl) {
3820 case MUX_STATUS:
3821 /* Only consider the mux to be ready if we're done with
3822 * the preface and settings, and we had no error.
3823 */
3824 if (h2c->st0 >= H2_CS_FRAME_H && h2c->st0 < H2_CS_ERROR)
3825 ret |= MUX_STATUS_READY;
3826 return ret;
3827 default:
3828 return -1;
3829 }
3830}
3831
Willy Tarreau62f52692017-10-08 23:01:42 +02003832/*
Olivier Houchard060ed432018-11-06 16:32:42 +01003833 * Destroy the mux and the associated connection, if it is no longer used
3834 */
Christopher Faulet73c12072019-04-08 11:23:22 +02003835static void h2_destroy(void *ctx)
Olivier Houchard060ed432018-11-06 16:32:42 +01003836{
Christopher Faulet73c12072019-04-08 11:23:22 +02003837 struct h2c *h2c = ctx;
Olivier Houchard060ed432018-11-06 16:32:42 +01003838
Willy Tarreau7838a792019-08-12 18:42:03 +02003839 TRACE_ENTER(H2_EV_H2C_END, h2c->conn);
Christopher Faulet39a96ee2019-04-08 10:52:21 +02003840 if (eb_is_empty(&h2c->streams_by_id) || !h2c->conn || h2c->conn->ctx != h2c)
Christopher Faulet73c12072019-04-08 11:23:22 +02003841 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003842 TRACE_LEAVE(H2_EV_H2C_END);
Olivier Houchard060ed432018-11-06 16:32:42 +01003843}
3844
3845/*
Willy Tarreau62f52692017-10-08 23:01:42 +02003846 * Detach the stream from the connection and possibly release the connection.
3847 */
3848static void h2_detach(struct conn_stream *cs)
3849{
Willy Tarreau60935142017-10-16 18:11:19 +02003850 struct h2s *h2s = cs->ctx;
3851 struct h2c *h2c;
Olivier Houchardf502aca2018-12-14 19:42:40 +01003852 struct session *sess;
Willy Tarreau60935142017-10-16 18:11:19 +02003853
Willy Tarreau7838a792019-08-12 18:42:03 +02003854 TRACE_ENTER(H2_EV_STRM_END, h2s ? h2s->h2c->conn : NULL, h2s);
3855
Willy Tarreau60935142017-10-16 18:11:19 +02003856 cs->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02003857 if (!h2s) {
3858 TRACE_LEAVE(H2_EV_STRM_END);
Willy Tarreau60935142017-10-16 18:11:19 +02003859 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02003860 }
Willy Tarreau60935142017-10-16 18:11:19 +02003861
Olivier Houchard998410a2019-04-15 19:23:37 +02003862 /* The stream is about to die, so no need to attempt to run its task */
Willy Tarreauc234ae32019-05-13 17:56:11 +02003863 if (LIST_ADDED(&h2s->sending_list) &&
Olivier Houchard998410a2019-04-15 19:23:37 +02003864 h2s->send_wait != &h2s->wait_event) {
Olivier Houchard5a3671d2019-10-11 16:33:49 +02003865 /*
3866 * Calling tasklet_remove_from_tasklet_list() here is fine,
3867 * as only the thread responsible for the tasklet should
3868 * call h2_detach().
3869 */
Willy Tarreau86eded62019-06-14 14:47:49 +02003870 tasklet_remove_from_tasklet_list(h2s->send_wait->tasklet);
Olivier Houchard998410a2019-04-15 19:23:37 +02003871 LIST_DEL_INIT(&h2s->sending_list);
Olivier Houchardd9986ed2019-05-09 13:24:08 +02003872 /*
3873 * At this point, the stream_interface is supposed to have called
3874 * h2_unsubscribe(), so the only way there's still a
3875 * subscription that came from the stream_interface (as we
3876 * can subscribe ourself, in h2_do_shutw() and h2_do_shutr(),
3877 * without the stream_interface involved) is that we subscribed
3878 * for sending, we woke the tasklet up and removed the
3879 * SUB_RETRY_SEND flag, so the stream_interface would not
3880 * know it has to unsubscribe for send, but the tasklet hasn't
3881 * run yet. Make sure to handle that by explicitely setting
3882 * send_wait to NULL, as nothing else will do it for us.
3883 */
3884 h2s->send_wait = NULL;
Olivier Houchard998410a2019-04-15 19:23:37 +02003885 }
3886
Olivier Houchardf502aca2018-12-14 19:42:40 +01003887 sess = h2s->sess;
Willy Tarreau60935142017-10-16 18:11:19 +02003888 h2c = h2s->h2c;
3889 h2s->cs = NULL;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02003890 h2c->nb_cs--;
Willy Tarreaufa1d3572019-01-31 10:31:51 +01003891 if ((h2c->flags & (H2_CF_IS_BACK|H2_CF_DEM_TOOMANY)) == H2_CF_DEM_TOOMANY &&
3892 !h2_frt_has_too_many_cs(h2c)) {
3893 /* frontend connection was blocking new streams creation */
Willy Tarreauf2101912018-07-19 10:11:38 +02003894 h2c->flags &= ~H2_CF_DEM_TOOMANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003895 h2c_restart_reading(h2c, 1);
Willy Tarreauf2101912018-07-19 10:11:38 +02003896 }
Willy Tarreau60935142017-10-16 18:11:19 +02003897
Willy Tarreau22cf59b2017-11-10 11:42:33 +01003898 /* this stream may be blocked waiting for some data to leave (possibly
3899 * an ES or RST frame), so orphan it in this case.
3900 */
Willy Tarreau3041fcc2018-03-29 15:41:32 +02003901 if (!(cs->conn->flags & CO_FL_ERROR) &&
Willy Tarreaua2b51812018-07-27 09:55:14 +02003902 (h2c->st0 < H2_CS_ERROR) &&
Willy Tarreau7838a792019-08-12 18:42:03 +02003903 (h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL)) && (h2s->send_wait || h2s->recv_wait)) {
3904 TRACE_DEVEL("leaving on stream blocked", H2_EV_STRM_END|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau22cf59b2017-11-10 11:42:33 +01003905 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02003906 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01003907
Willy Tarreau45f752e2017-10-30 15:44:59 +01003908 if ((h2c->flags & H2_CF_DEM_BLOCK_ANY && h2s->id == h2c->dsi) ||
3909 (h2c->flags & H2_CF_MUX_BLOCK_ANY && h2s->id == h2c->msi)) {
3910 /* unblock the connection if it was blocked on this
3911 * stream.
3912 */
3913 h2c->flags &= ~H2_CF_DEM_BLOCK_ANY;
3914 h2c->flags &= ~H2_CF_MUX_BLOCK_ANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003915 h2c_restart_reading(h2c, 1);
Willy Tarreau45f752e2017-10-30 15:44:59 +01003916 }
3917
Willy Tarreau71049cc2018-03-28 13:56:39 +02003918 h2s_destroy(h2s);
Willy Tarreau60935142017-10-16 18:11:19 +02003919
Christopher Faulet9b79a102019-07-15 11:22:56 +02003920 if (h2c->flags & H2_CF_IS_BACK) {
Olivier Houchard8a786902018-12-15 16:05:40 +01003921 if (!(h2c->conn->flags &
3922 (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH))) {
3923 if (!h2c->conn->owner) {
Olivier Houchardf502aca2018-12-14 19:42:40 +01003924 h2c->conn->owner = sess;
Olivier Houchard351411f2018-12-27 17:20:54 +01003925 if (!session_add_conn(sess, h2c->conn, h2c->conn->target)) {
3926 h2c->conn->owner = NULL;
3927 if (eb_is_empty(&h2c->streams_by_id)) {
3928 if (!srv_add_to_idle_list(objt_server(h2c->conn->target), h2c->conn))
3929 /* The server doesn't want it, let's kill the connection right away */
3930 h2c->conn->mux->destroy(h2c->conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003931 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
Olivier Houchard351411f2018-12-27 17:20:54 +01003932 return;
3933 }
3934 }
Olivier Houchard8a786902018-12-15 16:05:40 +01003935 }
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003936 if (eb_is_empty(&h2c->streams_by_id)) {
Christopher Fauletb2d930e2019-09-26 16:15:10 +02003937 if (session_check_idle_conn(h2c->conn->owner, h2c->conn) != 0) {
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003938 /* 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 +02003939 TRACE_DEVEL("leaving without reusable idle connection", H2_EV_STRM_END);
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003940 return;
Christopher Fauletb2d930e2019-09-26 16:15:10 +02003941 }
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003942 }
Olivier Houchard8a786902018-12-15 16:05:40 +01003943 /* Never ever allow to reuse a connection from a non-reuse backend */
3944 if ((h2c->proxy->options & PR_O_REUSE_MASK) == PR_O_REUSE_NEVR)
3945 h2c->conn->flags |= CO_FL_PRIVATE;
Willy Tarreauc234ae32019-05-13 17:56:11 +02003946 if (!LIST_ADDED(&h2c->conn->list) && h2c->nb_streams < h2c->streams_limit) {
Olivier Houchard8a786902018-12-15 16:05:40 +01003947 struct server *srv = objt_server(h2c->conn->target);
3948
3949 if (srv) {
3950 if (h2c->conn->flags & CO_FL_PRIVATE)
3951 LIST_ADD(&srv->priv_conns[tid], &h2c->conn->list);
3952 else
3953 LIST_ADD(&srv->idle_conns[tid], &h2c->conn->list);
3954 }
3955
3956 }
3957 }
3958 }
3959
Willy Tarreaue323f342018-03-28 13:51:45 +02003960 /* We don't want to close right now unless we're removing the
3961 * last stream, and either the connection is in error, or it
3962 * reached the ID already specified in a GOAWAY frame received
3963 * or sent (as seen by last_sid >= 0).
3964 */
Olivier Houchard7a977432019-03-21 15:47:13 +01003965 if (h2c_is_dead(h2c)) {
Willy Tarreaue323f342018-03-28 13:51:45 +02003966 /* no more stream will come, kill it now */
Willy Tarreau7838a792019-08-12 18:42:03 +02003967 TRACE_DEVEL("leaving and killing dead connection", H2_EV_STRM_END, h2c->conn);
Christopher Faulet73c12072019-04-08 11:23:22 +02003968 h2_release(h2c);
Willy Tarreaue323f342018-03-28 13:51:45 +02003969 }
3970 else if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02003971 if (h2c_may_expire(h2c))
3972 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
3973 else
3974 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02003975 task_queue(h2c->task);
Willy Tarreau7838a792019-08-12 18:42:03 +02003976 TRACE_DEVEL("leaving, refreshing connection's timeout", H2_EV_STRM_END, h2c->conn);
Willy Tarreau60935142017-10-16 18:11:19 +02003977 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003978 else
3979 TRACE_DEVEL("leaving", H2_EV_STRM_END, h2c->conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003980}
3981
Willy Tarreau88bdba32019-05-13 18:17:53 +02003982/* Performs a synchronous or asynchronous shutr(). */
3983static void h2_do_shutr(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02003984{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003985 struct h2c *h2c = h2s->h2c;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003986 struct wait_event *sw = &h2s->wait_event;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003987
Willy Tarreauf983d002019-05-14 10:40:21 +02003988 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02003989 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003990
Willy Tarreau7838a792019-08-12 18:42:03 +02003991 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
3992
Willy Tarreau18059042019-01-31 19:12:48 +01003993 /* a connstream may require us to immediately kill the whole connection
3994 * for example because of a "tcp-request content reject" rule that is
3995 * normally used to limit abuse. In this case we schedule a goaway to
3996 * close the connection.
Willy Tarreau926fa4c2017-11-07 14:42:12 +01003997 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02003998 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01003999 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004000 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004001 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4002 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4003 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004004 else if (!(h2s->flags & H2_SF_HEADERS_SENT)) {
4005 /* Nothing was never sent for this stream, so reset with
4006 * REFUSED_STREAM error to let the client retry the
4007 * request.
4008 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004009 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004010 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4011 }
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004012 else {
4013 /* a final response was already provided, we don't want this
4014 * stream anymore. This may happen when the server responds
4015 * before the end of an upload and closes quickly (redirect,
4016 * deny, ...)
4017 */
4018 h2s_error(h2s, H2_ERR_CANCEL);
4019 }
Willy Tarreau18059042019-01-31 19:12:48 +01004020
Willy Tarreau90c32322017-11-24 08:00:30 +01004021 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004022 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004023 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004024
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004025 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004026 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau00dd0782018-03-01 16:31:34 +01004027 h2s_close(h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004028 done:
4029 h2s->flags &= ~H2_SF_WANT_SHUTR;
Willy Tarreau7838a792019-08-12 18:42:03 +02004030 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004031 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004032add_to_list:
Willy Tarreauc234ae32019-05-13 17:56:11 +02004033 if (!LIST_ADDED(&h2s->list)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004034 sw->events |= SUB_RETRY_SEND;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004035 if (h2s->flags & H2_SF_BLK_MFCTL) {
4036 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
4037 h2s->send_wait = sw;
4038 } else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM)) {
4039 h2s->send_wait = sw;
4040 LIST_ADDQ(&h2c->send_list, &h2s->list);
4041 }
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004042 }
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004043 /* Let the handler know we want shutr */
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004044 h2s->flags |= H2_SF_WANT_SHUTR;
Willy Tarreau7838a792019-08-12 18:42:03 +02004045 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004046 return;
Willy Tarreau62f52692017-10-08 23:01:42 +02004047}
4048
Willy Tarreau88bdba32019-05-13 18:17:53 +02004049/* Performs a synchronous or asynchronous shutw(). */
4050static void h2_do_shutw(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004051{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004052 struct h2c *h2c = h2s->h2c;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004053 struct wait_event *sw = &h2s->wait_event;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004054
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004055 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004056 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004057
Willy Tarreau7838a792019-08-12 18:42:03 +02004058 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4059
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004060 if (h2s->st != H2_SS_ERROR && (h2s->flags & H2_SF_HEADERS_SENT)) {
Willy Tarreau58e32082017-11-07 14:41:09 +01004061 /* we can cleanly close using an empty data frame only after headers */
4062
4063 if (!(h2s->flags & (H2_SF_ES_SENT|H2_SF_RST_SENT)) &&
4064 h2_send_empty_data_es(h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004065 goto add_to_list;
Willy Tarreau58e32082017-11-07 14:41:09 +01004066
4067 if (h2s->st == H2_SS_HREM)
Willy Tarreau00dd0782018-03-01 16:31:34 +01004068 h2s_close(h2s);
Willy Tarreau58e32082017-11-07 14:41:09 +01004069 else
4070 h2s->st = H2_SS_HLOC;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004071 } else {
Willy Tarreau18059042019-01-31 19:12:48 +01004072 /* a connstream may require us to immediately kill the whole connection
4073 * for example because of a "tcp-request content reject" rule that is
4074 * normally used to limit abuse. In this case we schedule a goaway to
4075 * close the connection.
Willy Tarreaua1349f02017-10-31 07:41:55 +01004076 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004077 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004078 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004079 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004080 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4081 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4082 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004083 else {
4084 /* Nothing was never sent for this stream, so reset with
4085 * REFUSED_STREAM error to let the client retry the
4086 * request.
4087 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004088 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004089 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4090 }
Willy Tarreau18059042019-01-31 19:12:48 +01004091
Willy Tarreau90c32322017-11-24 08:00:30 +01004092 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004093 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004094 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004095
Willy Tarreau00dd0782018-03-01 16:31:34 +01004096 h2s_close(h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004097 }
4098
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004099 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004100 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau7838a792019-08-12 18:42:03 +02004101
4102 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
4103
Willy Tarreau88bdba32019-05-13 18:17:53 +02004104 done:
4105 h2s->flags &= ~H2_SF_WANT_SHUTW;
4106 return;
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004107
4108 add_to_list:
Willy Tarreauc234ae32019-05-13 17:56:11 +02004109 if (!LIST_ADDED(&h2s->list)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004110 sw->events |= SUB_RETRY_SEND;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004111 if (h2s->flags & H2_SF_BLK_MFCTL) {
4112 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
4113 h2s->send_wait = sw;
4114 } else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM)) {
4115 h2s->send_wait = sw;
4116 LIST_ADDQ(&h2c->send_list, &h2s->list);
4117 }
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004118 }
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004119 /* let the handler know we want to shutw */
4120 h2s->flags |= H2_SF_WANT_SHUTW;
Willy Tarreau7838a792019-08-12 18:42:03 +02004121 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004122 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004123}
4124
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004125/* This is the tasklet referenced in h2s->wait_event.tasklet, it is used for
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004126 * deferred shutdowns when the h2_detach() was done but the mux buffer was full
4127 * and prevented the last frame from being emitted.
4128 */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004129static struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned short state)
4130{
4131 struct h2s *h2s = ctx;
Willy Tarreau88bdba32019-05-13 18:17:53 +02004132 struct h2c *h2c = h2s->h2c;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004133
Willy Tarreau7838a792019-08-12 18:42:03 +02004134 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4135
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004136 LIST_DEL_INIT(&h2s->sending_list);
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004137 if (h2s->flags & H2_SF_WANT_SHUTW)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004138 h2_do_shutw(h2s);
4139
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004140 if (h2s->flags & H2_SF_WANT_SHUTR)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004141 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004142
Willy Tarreau88bdba32019-05-13 18:17:53 +02004143 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004144 /* We're done trying to send, remove ourself from the send_list */
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004145 LIST_DEL_INIT(&h2s->list);
Olivier Houchard7a977432019-03-21 15:47:13 +01004146
Willy Tarreau88bdba32019-05-13 18:17:53 +02004147 if (!h2s->cs) {
4148 h2s_destroy(h2s);
4149 if (h2c_is_dead(h2c))
4150 h2_release(h2c);
4151 }
Olivier Houchard7a977432019-03-21 15:47:13 +01004152 }
4153
Willy Tarreau7838a792019-08-12 18:42:03 +02004154 TRACE_LEAVE(H2_EV_STRM_SHUT);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004155 return NULL;
Willy Tarreau62f52692017-10-08 23:01:42 +02004156}
4157
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004158/* shutr() called by the conn_stream (mux_ops.shutr) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004159static void h2_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
4160{
4161 struct h2s *h2s = cs->ctx;
4162
Willy Tarreau7838a792019-08-12 18:42:03 +02004163 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004164 if (cs->flags & CS_FL_KILL_CONN)
4165 h2s->flags |= H2_SF_KILL_CONN;
4166
Willy Tarreau7838a792019-08-12 18:42:03 +02004167 if (mode)
4168 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004169
Willy Tarreau7838a792019-08-12 18:42:03 +02004170 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004171}
4172
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004173/* shutw() called by the conn_stream (mux_ops.shutw) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004174static void h2_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
4175{
4176 struct h2s *h2s = cs->ctx;
4177
Willy Tarreau7838a792019-08-12 18:42:03 +02004178 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004179 if (cs->flags & CS_FL_KILL_CONN)
4180 h2s->flags |= H2_SF_KILL_CONN;
4181
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004182 h2_do_shutw(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02004183 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004184}
4185
Christopher Faulet9b79a102019-07-15 11:22:56 +02004186/* Decode the payload of a HEADERS frame and produce the HTX request or response
4187 * depending on the connection's side. Returns a positive value on success, a
4188 * negative value on failure, or 0 if it couldn't proceed. May report connection
4189 * errors in h2c->errcode if the frame is non-decodable and the connection
4190 * unrecoverable. In absence of connection error when a failure is reported, the
4191 * caller must assume a stream error.
Willy Tarreauea18f862018-12-22 20:19:26 +01004192 *
4193 * The function may fold CONTINUATION frames into the initial HEADERS frame
4194 * by removing padding and next frame header, then moving the CONTINUATION
4195 * frame's payload and adjusting h2c->dfl to match the new aggregated frame,
4196 * leaving a hole between the main frame and the beginning of the next one.
4197 * The possibly remaining incomplete or next frame at the end may be moved
4198 * if the aggregated frame is not deleted, in order to fill the hole. Wrapped
4199 * HEADERS frames are unwrapped into a temporary buffer before decoding.
4200 *
4201 * A buffer at the beginning of processing may look like this :
4202 *
4203 * ,---.---------.-----.--------------.--------------.------.---.
4204 * |///| HEADERS | PAD | CONTINUATION | CONTINUATION | DATA |///|
4205 * `---^---------^-----^--------------^--------------^------^---'
4206 * | | <-----> | |
4207 * area | dpl | wrap
4208 * |<--------------> |
4209 * | dfl |
4210 * |<-------------------------------------------------->|
4211 * head data
4212 *
4213 * Padding is automatically overwritten when folding, participating to the
4214 * hole size after dfl :
4215 *
4216 * ,---.------------------------.-----.--------------.------.---.
4217 * |///| HEADERS : CONTINUATION |/////| CONTINUATION | DATA |///|
4218 * `---^------------------------^-----^--------------^------^---'
4219 * | | <-----> | |
4220 * area | hole | wrap
4221 * |<-----------------------> |
4222 * | dfl |
4223 * |<-------------------------------------------------->|
4224 * head data
4225 *
4226 * Please note that the HEADERS frame is always deprived from its PADLEN byte
4227 * however it may start with the 5 stream-dep+weight bytes in case of PRIORITY
4228 * bit.
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004229 *
4230 * The <flags> field must point to either the stream's flags or to a copy of it
4231 * so that the function can update the following flags :
4232 * - H2_SF_DATA_CLEN when content-length is seen
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004233 * - H2_SF_HEADERS_RCVD once the frame is successfully decoded
Willy Tarreau88d138e2019-01-02 19:38:14 +01004234 *
4235 * The H2_SF_HEADERS_RCVD flag is also looked at in the <flags> field prior to
4236 * decoding, in order to detect if we're dealing with a headers or a trailers
4237 * block (the trailers block appears after H2_SF_HEADERS_RCVD was seen).
Willy Tarreau13278b42017-10-13 19:23:14 +02004238 */
Willy Tarreau4790f7c2019-01-24 11:33:02 +01004239static 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 +02004240{
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004241 const uint8_t *hdrs = (uint8_t *)b_head(&h2c->dbuf);
Willy Tarreau83061a82018-07-13 11:56:34 +02004242 struct buffer *tmp = get_trash_chunk();
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004243 struct http_hdr list[global.tune.max_http_hdr * 2];
Willy Tarreau83061a82018-07-13 11:56:34 +02004244 struct buffer *copy = NULL;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004245 unsigned int msgf;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004246 struct htx *htx = NULL;
Willy Tarreauea18f862018-12-22 20:19:26 +01004247 int flen; // header frame len
4248 int hole = 0;
Willy Tarreau86277d42019-01-02 15:36:11 +01004249 int ret = 0;
4250 int outlen;
Willy Tarreau13278b42017-10-13 19:23:14 +02004251 int wrap;
Willy Tarreau13278b42017-10-13 19:23:14 +02004252
Willy Tarreau7838a792019-08-12 18:42:03 +02004253 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
4254
Willy Tarreauea18f862018-12-22 20:19:26 +01004255next_frame:
4256 if (b_data(&h2c->dbuf) - hole < h2c->dfl)
4257 goto leave; // incomplete input frame
4258
4259 /* No END_HEADERS means there's one or more CONTINUATION frames. In
4260 * this case, we'll try to paste it immediately after the initial
4261 * HEADERS frame payload and kill any possible padding. The initial
4262 * frame's length will be increased to represent the concatenation
4263 * of the two frames. The next frame is read from position <tlen>
4264 * and written at position <flen> (minus padding if some is present).
4265 */
4266 if (unlikely(!(h2c->dff & H2_F_HEADERS_END_HEADERS))) {
4267 struct h2_fh hdr;
4268 int clen; // CONTINUATION frame's payload length
4269
Willy Tarreau7838a792019-08-12 18:42:03 +02004270 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 +01004271 if (!h2_peek_frame_hdr(&h2c->dbuf, h2c->dfl + hole, &hdr)) {
4272 /* no more data, the buffer may be full, either due to
4273 * too large a frame or because of too large a hole that
4274 * we're going to compact at the end.
4275 */
4276 goto leave;
4277 }
4278
4279 if (hdr.ft != H2_FT_CONTINUATION) {
4280 /* RFC7540#6.10: frame of unexpected type */
Willy Tarreau7838a792019-08-12 18:42:03 +02004281 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 +01004282 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
4283 goto fail;
4284 }
4285
4286 if (hdr.sid != h2c->dsi) {
4287 /* RFC7540#6.10: frame of different stream */
Willy Tarreau7838a792019-08-12 18:42:03 +02004288 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 +01004289 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
4290 goto fail;
4291 }
4292
4293 if ((unsigned)hdr.len > (unsigned)global.tune.bufsize) {
4294 /* RFC7540#4.2: invalid frame length */
Willy Tarreau7838a792019-08-12 18:42:03 +02004295 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 +01004296 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4297 goto fail;
4298 }
4299
4300 /* detect when we must stop aggragating frames */
4301 h2c->dff |= hdr.ff & H2_F_HEADERS_END_HEADERS;
4302
4303 /* Take as much as we can of the CONTINUATION frame's payload */
4304 clen = b_data(&h2c->dbuf) - (h2c->dfl + hole + 9);
4305 if (clen > hdr.len)
4306 clen = hdr.len;
4307
4308 /* Move the frame's payload over the padding, hole and frame
4309 * header. At least one of hole or dpl is null (see diagrams
4310 * above). The hole moves after the new aggragated frame.
4311 */
4312 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole + 9), clen, -(h2c->dpl + hole + 9));
4313 h2c->dfl += clen - h2c->dpl;
4314 hole += h2c->dpl + 9;
4315 h2c->dpl = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004316 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 +01004317 goto next_frame;
4318 }
4319
4320 flen = h2c->dfl - h2c->dpl;
Willy Tarreau68472622017-12-11 18:36:37 +01004321
Willy Tarreau13278b42017-10-13 19:23:14 +02004322 /* if the input buffer wraps, take a temporary copy of it (rare) */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004323 wrap = b_wrap(&h2c->dbuf) - b_head(&h2c->dbuf);
Willy Tarreau13278b42017-10-13 19:23:14 +02004324 if (wrap < h2c->dfl) {
Willy Tarreau68dd9852017-07-03 14:44:26 +02004325 copy = alloc_trash_chunk();
4326 if (!copy) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004327 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 +02004328 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
4329 goto fail;
4330 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004331 memcpy(copy->area, b_head(&h2c->dbuf), wrap);
4332 memcpy(copy->area + wrap, b_orig(&h2c->dbuf), h2c->dfl - wrap);
4333 hdrs = (uint8_t *) copy->area;
Willy Tarreau13278b42017-10-13 19:23:14 +02004334 }
4335
Willy Tarreau13278b42017-10-13 19:23:14 +02004336 /* Skip StreamDep and weight for now (we don't support PRIORITY) */
4337 if (h2c->dff & H2_F_HEADERS_PRIORITY) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004338 if (read_n32(hdrs) == h2c->dsi) {
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004339 /* RFC7540#5.3.1 : stream dep may not depend on itself */
Willy Tarreau7838a792019-08-12 18:42:03 +02004340 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 +01004341 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreaua0d11b62018-09-05 18:30:05 +02004342 goto fail;
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004343 }
4344
Willy Tarreaua01f45e2018-12-31 07:41:24 +01004345 if (flen < 5) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004346 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 +01004347 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4348 goto fail;
4349 }
4350
Willy Tarreau13278b42017-10-13 19:23:14 +02004351 hdrs += 5; // stream dep = 4, weight = 1
4352 flen -= 5;
4353 }
4354
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004355 if (!h2_get_buf(h2c, rxbuf)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004356 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 +01004357 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau86277d42019-01-02 15:36:11 +01004358 goto leave;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004359 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004360
Willy Tarreau937f7602018-02-26 15:22:17 +01004361 /* we can't retry a failed decompression operation so we must be very
4362 * careful not to take any risks. In practice the output buffer is
4363 * always empty except maybe for trailers, in which case we simply have
4364 * to wait for the upper layer to finish consuming what is available.
4365 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004366 htx = htx_from_buf(rxbuf);
4367 if (!htx_is_empty(htx)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004368 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 +02004369 h2c->flags |= H2_CF_DEM_SFULL;
4370 goto leave;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004371 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004372
Willy Tarreau25919232019-01-03 14:48:18 +01004373 /* past this point we cannot roll back in case of error */
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004374 outlen = hpack_decode_frame(h2c->ddht, hdrs, flen, list,
4375 sizeof(list)/sizeof(list[0]), tmp);
4376 if (outlen < 0) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004377 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 +01004378 h2c_error(h2c, H2_ERR_COMPRESSION_ERROR);
4379 goto fail;
4380 }
4381
Willy Tarreau25919232019-01-03 14:48:18 +01004382 /* The PACK decompressor was updated, let's update the input buffer and
4383 * the parser's state to commit these changes and allow us to later
4384 * fail solely on the stream if needed.
4385 */
4386 b_del(&h2c->dbuf, h2c->dfl + hole);
4387 h2c->dfl = hole = 0;
4388 h2c->st0 = H2_CS_FRAME_H;
4389
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004390 /* OK now we have our header list in <list> */
Willy Tarreau880f5802019-01-03 08:10:14 +01004391 msgf = (h2c->dff & H2_F_HEADERS_END_STREAM) ? 0 : H2_MSGF_BODY;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004392
Willy Tarreau88d138e2019-01-02 19:38:14 +01004393 if (*flags & H2_SF_HEADERS_RCVD)
4394 goto trailers;
4395
4396 /* This is the first HEADERS frame so it's a headers block */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004397 if (h2c->flags & H2_CF_IS_BACK)
4398 outlen = h2_make_htx_response(list, htx, &msgf, body_len);
4399 else
4400 outlen = h2_make_htx_request(list, htx, &msgf, body_len);
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004401
4402 if (outlen < 0) {
Willy Tarreau25919232019-01-03 14:48:18 +01004403 /* too large headers? this is a stream error only */
Willy Tarreau7838a792019-08-12 18:42:03 +02004404 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 +01004405 goto fail;
4406 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004407
Willy Tarreau174b06a2018-04-25 18:13:58 +02004408 if (msgf & H2_MSGF_BODY) {
4409 /* a payload is present */
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004410 if (msgf & H2_MSGF_BODY_CL) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004411 *flags |= H2_SF_DATA_CLEN;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004412 htx->extra = *body_len;
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004413 }
Willy Tarreau174b06a2018-04-25 18:13:58 +02004414 }
4415
Willy Tarreau88d138e2019-01-02 19:38:14 +01004416 done:
Christopher Faulet0b465482019-02-19 15:14:23 +01004417 /* indicate that a HEADERS frame was received for this stream, except
4418 * for 1xx responses. For 1xx responses, another HEADERS frame is
4419 * expected.
4420 */
4421 if (!(msgf & H2_MSGF_RSP_1XX))
4422 *flags |= H2_SF_HEADERS_RCVD;
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004423
Christopher Fauletb75b5ea2019-05-17 08:37:28 +02004424 if ((h2c->dff & H2_F_HEADERS_END_STREAM)) {
Christopher Faulet9b79a102019-07-15 11:22:56 +02004425 /* Mark the end of message using EOM */
Willy Tarreau7838a792019-08-12 18:42:03 +02004426 if (!htx_add_endof(htx, HTX_BLK_EOM)) {
4427 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 +02004428 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004429 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01004430 }
Willy Tarreau937f7602018-02-26 15:22:17 +01004431
Willy Tarreau86277d42019-01-02 15:36:11 +01004432 /* success */
4433 ret = 1;
4434
Willy Tarreau68dd9852017-07-03 14:44:26 +02004435 leave:
Willy Tarreau86277d42019-01-02 15:36:11 +01004436 /* If there is a hole left and it's not at the end, we are forced to
Willy Tarreauea18f862018-12-22 20:19:26 +01004437 * move the remaining data over it.
4438 */
4439 if (hole) {
4440 if (b_data(&h2c->dbuf) > h2c->dfl + hole)
4441 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole),
4442 b_data(&h2c->dbuf) - (h2c->dfl + hole), -hole);
4443 b_sub(&h2c->dbuf, hole);
4444 }
4445
Willy Tarreau97215ca2019-04-29 10:20:21 +02004446 if (b_full(&h2c->dbuf) && h2c->dfl >= b_data(&h2c->dbuf)) {
Willy Tarreauea18f862018-12-22 20:19:26 +01004447 /* too large frames */
4448 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau86277d42019-01-02 15:36:11 +01004449 ret = -1;
Willy Tarreauea18f862018-12-22 20:19:26 +01004450 }
4451
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004452 if (htx)
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004453 htx_to_buf(htx, rxbuf);
Willy Tarreau68dd9852017-07-03 14:44:26 +02004454 free_trash_chunk(copy);
Willy Tarreau7838a792019-08-12 18:42:03 +02004455 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau86277d42019-01-02 15:36:11 +01004456 return ret;
4457
Willy Tarreau68dd9852017-07-03 14:44:26 +02004458 fail:
Willy Tarreau86277d42019-01-02 15:36:11 +01004459 ret = -1;
Willy Tarreau68dd9852017-07-03 14:44:26 +02004460 goto leave;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004461
4462 trailers:
4463 /* This is the last HEADERS frame hence a trailer */
Willy Tarreau88d138e2019-01-02 19:38:14 +01004464 if (!(h2c->dff & H2_F_HEADERS_END_STREAM)) {
4465 /* It's a trailer but it's missing ES flag */
Willy Tarreau7838a792019-08-12 18:42:03 +02004466 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 +01004467 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
4468 goto fail;
4469 }
4470
Christopher Faulet9b79a102019-07-15 11:22:56 +02004471 /* Trailers terminate a DATA sequence */
Willy Tarreau7838a792019-08-12 18:42:03 +02004472 if (h2_make_htx_trailers(list, htx) <= 0) {
4473 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 +02004474 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004475 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01004476 goto done;
Willy Tarreau13278b42017-10-13 19:23:14 +02004477}
4478
Christopher Faulet9b79a102019-07-15 11:22:56 +02004479/* Transfer the payload of a DATA frame to the HTTP/1 side. The HTTP/2 frame
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004480 * parser state is automatically updated. Returns > 0 if it could completely
4481 * send the current frame, 0 if it couldn't complete, in which case
4482 * CS_FL_RCV_MORE must be checked to know if some data remain pending (an empty
4483 * DATA frame can return 0 as a valid result). Stream errors are reported in
4484 * h2s->errcode and connection errors in h2c->errcode. The caller must already
4485 * have checked the frame header and ensured that the frame was complete or the
4486 * buffer full. It changes the frame state to FRAME_A once done.
Willy Tarreau454f9052017-10-26 19:40:35 +02004487 */
Willy Tarreau454b57b2018-02-26 15:50:05 +01004488static int h2_frt_transfer_data(struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02004489{
4490 struct h2c *h2c = h2s->h2c;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004491 int block;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004492 unsigned int flen = 0;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004493 struct htx *htx = NULL;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004494 struct buffer *csbuf;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004495 unsigned int sent;
Willy Tarreau454f9052017-10-26 19:40:35 +02004496
Willy Tarreau7838a792019-08-12 18:42:03 +02004497 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
4498
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004499 h2c->flags &= ~H2_CF_DEM_SFULL;
Willy Tarreau454f9052017-10-26 19:40:35 +02004500
Olivier Houchard638b7992018-08-16 15:41:52 +02004501 csbuf = h2_get_buf(h2c, &h2s->rxbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004502 if (!csbuf) {
4503 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02004504 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 +01004505 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004506 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004507 htx = htx_from_buf(csbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004508
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004509try_again:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004510 flen = h2c->dfl - h2c->dpl;
4511 if (!flen)
Willy Tarreau4a28da12018-01-04 14:41:00 +01004512 goto end_transfer;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004513
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004514 if (flen > b_data(&h2c->dbuf)) {
4515 flen = b_data(&h2c->dbuf);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004516 if (!flen)
Willy Tarreau454b57b2018-02-26 15:50:05 +01004517 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004518 }
4519
Christopher Faulet9b79a102019-07-15 11:22:56 +02004520 block = htx_free_data_space(htx);
4521 if (!block) {
4522 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004523 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 +02004524 goto fail;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004525 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004526 if (flen > block)
4527 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004528
Christopher Faulet9b79a102019-07-15 11:22:56 +02004529 /* here, flen is the max we can copy into the output buffer */
4530 block = b_contig_data(&h2c->dbuf, 0);
4531 if (flen > block)
4532 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004533
Christopher Faulet9b79a102019-07-15 11:22:56 +02004534 sent = htx_add_data(htx, ist2(b_head(&h2c->dbuf), flen));
Willy Tarreau7838a792019-08-12 18:42:03 +02004535 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 +02004536
Christopher Faulet9b79a102019-07-15 11:22:56 +02004537 b_del(&h2c->dbuf, sent);
4538 h2c->dfl -= sent;
4539 h2c->rcvd_c += sent;
4540 h2c->rcvd_s += sent; // warning, this can also affect the closed streams!
Willy Tarreau454f9052017-10-26 19:40:35 +02004541
Christopher Faulet9b79a102019-07-15 11:22:56 +02004542 if (h2s->flags & H2_SF_DATA_CLEN) {
4543 h2s->body_len -= sent;
4544 htx->extra = h2s->body_len;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004545 }
4546
Christopher Faulet9b79a102019-07-15 11:22:56 +02004547 if (sent < flen) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01004548 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004549 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 +01004550 goto fail;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004551 }
4552
Christopher Faulet9b79a102019-07-15 11:22:56 +02004553 goto try_again;
4554
Willy Tarreau4a28da12018-01-04 14:41:00 +01004555 end_transfer:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004556 /* here we're done with the frame, all the payload (except padding) was
4557 * transferred.
4558 */
Willy Tarreaueba10f22018-04-25 20:44:22 +02004559
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004560 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Faulet9b79a102019-07-15 11:22:56 +02004561 if (!htx_add_endof(htx, HTX_BLK_EOM)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004562 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 +02004563 h2c->flags |= H2_CF_DEM_SFULL;
4564 goto fail;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004565 }
Willy Tarreaueba10f22018-04-25 20:44:22 +02004566 }
4567
Willy Tarreaud1023bb2018-03-22 16:53:12 +01004568 h2c->rcvd_c += h2c->dpl;
4569 h2c->rcvd_s += h2c->dpl;
4570 h2c->dpl = 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02004571 h2c->st0 = H2_CS_FRAME_A; // send the corresponding window update
Christopher Faulet9b79a102019-07-15 11:22:56 +02004572 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02004573 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004574 return 1;
Willy Tarreau454b57b2018-02-26 15:50:05 +01004575 fail:
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004576 if (htx)
4577 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02004578 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454b57b2018-02-26 15:50:05 +01004579 return 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02004580}
4581
Willy Tarreau115e83b2018-12-01 19:17:53 +01004582/* Try to send a HEADERS frame matching HTX response present in HTX message
4583 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
4584 * must check the stream's status to detect any error which might have happened
4585 * subsequently to a successful send. The htx blocks are automatically removed
4586 * from the message. The htx message is assumed to be valid since produced from
4587 * the internal code, hence it contains a start line, an optional series of
4588 * header blocks and an end of header, otherwise an invalid frame could be
4589 * emitted and the resulting htx message could be left in an inconsistent state.
4590 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004591static size_t h2s_frt_make_resp_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau115e83b2018-12-01 19:17:53 +01004592{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004593 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau115e83b2018-12-01 19:17:53 +01004594 struct h2c *h2c = h2s->h2c;
4595 struct htx_blk *blk;
4596 struct htx_blk *blk_end;
4597 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02004598 struct buffer *mbuf;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004599 struct htx_sl *sl;
4600 enum htx_blk_type type;
4601 int es_now = 0;
4602 int ret = 0;
4603 int hdr;
4604 int idx;
4605
Willy Tarreau7838a792019-08-12 18:42:03 +02004606 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
4607
Willy Tarreau115e83b2018-12-01 19:17:53 +01004608 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004609 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004610 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02004611 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004612 return 0;
4613 }
4614
Willy Tarreau115e83b2018-12-01 19:17:53 +01004615 /* determine the first block which must not be deleted, blk_end may
4616 * be NULL if all blocks have to be deleted.
4617 */
4618 idx = htx_get_head(htx);
4619 blk_end = NULL;
4620 while (idx != -1) {
4621 type = htx_get_blk_type(htx_get_blk(htx, idx));
4622 idx = htx_get_next(htx, idx);
4623 if (type == HTX_BLK_EOH) {
4624 if (idx != -1)
4625 blk_end = htx_get_blk(htx, idx);
4626 break;
4627 }
4628 }
4629
4630 /* get the start line, we do have one */
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004631 blk = htx_get_head_blk(htx);
Christopher Fauletea009732019-11-18 15:50:25 +01004632 BUG_ON(!blk || htx_get_blk_type(blk) != HTX_BLK_RES_SL);
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004633 ALREADY_CHECKED(blk);
4634 sl = htx_get_blk_ptr(htx, blk);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004635 h2s->status = sl->info.res.status;
Willy Tarreau7838a792019-08-12 18:42:03 +02004636 if (h2s->status < 100 || h2s->status > 999) {
4637 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 +01004638 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004639 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01004640
4641 /* and the rest of the headers, that we dump starting at header 0 */
4642 hdr = 0;
4643
Willy Tarreau8e162ee2018-12-06 14:07:27 +01004644 idx = htx_get_head(htx); // returns the SL that we skip
Willy Tarreau115e83b2018-12-01 19:17:53 +01004645 while ((idx = htx_get_next(htx, idx)) != -1) {
4646 blk = htx_get_blk(htx, idx);
4647 type = htx_get_blk_type(blk);
4648
4649 if (type == HTX_BLK_UNUSED)
4650 continue;
4651
4652 if (type != HTX_BLK_HDR)
4653 break;
4654
Willy Tarreau7838a792019-08-12 18:42:03 +02004655 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
4656 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 +01004657 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004658 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01004659
4660 list[hdr].n = htx_get_blk_name(htx, blk);
4661 list[hdr].v = htx_get_blk_value(htx, blk);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004662 hdr++;
4663 }
4664
4665 /* marker for end of headers */
4666 list[hdr].n = ist("");
4667
4668 if (h2s->status == 204 || h2s->status == 304) {
4669 /* no contents, claim c-len is present and set to zero */
4670 es_now = 1;
4671 }
4672
Willy Tarreau9c218e72019-05-26 10:08:28 +02004673 mbuf = br_tail(h2c->mbuf);
4674 retry:
4675 if (!h2_get_buf(h2c, mbuf)) {
4676 h2c->flags |= H2_CF_MUX_MALLOC;
4677 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02004678 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 +02004679 return 0;
4680 }
4681
Willy Tarreau115e83b2018-12-01 19:17:53 +01004682 chunk_reset(&outbuf);
4683
4684 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004685 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
4686 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004687 break;
4688 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02004689 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau115e83b2018-12-01 19:17:53 +01004690 }
4691
4692 if (outbuf.size < 9)
4693 goto full;
4694
4695 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
4696 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
4697 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4698 outbuf.data = 9;
4699
4700 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01004701 if (!hpack_encode_int_status(&outbuf, h2s->status)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004702 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004703 goto realign_again;
4704 goto full;
4705 }
4706
4707 /* encode all headers, stop at empty name */
4708 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
4709 /* these ones do not exist in H2 and must be dropped. */
4710 if (isteq(list[hdr].n, ist("connection")) ||
4711 isteq(list[hdr].n, ist("proxy-connection")) ||
4712 isteq(list[hdr].n, ist("keep-alive")) ||
4713 isteq(list[hdr].n, ist("upgrade")) ||
4714 isteq(list[hdr].n, ist("transfer-encoding")))
4715 continue;
4716
Christopher Faulet86d144c2019-08-14 16:32:25 +02004717 /* Skip all pseudo-headers */
4718 if (*(list[hdr].n.ptr) == ':')
4719 continue;
4720
Willy Tarreau115e83b2018-12-01 19:17:53 +01004721 if (isteq(list[hdr].n, ist("")))
4722 break; // end
4723
4724 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
4725 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004726 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004727 goto realign_again;
4728 goto full;
4729 }
4730 }
4731
Willy Tarreaucb985a42019-10-07 16:56:34 +02004732 /* update the frame's size */
4733 h2_set_frame_size(outbuf.area, outbuf.data - 9);
4734
4735 if (outbuf.data > h2c->mfs + 9) {
4736 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
4737 /* output full */
4738 if (b_space_wraps(mbuf))
4739 goto realign_again;
4740 goto full;
4741 }
4742 }
4743
Christopher Faulet0b465482019-02-19 15:14:23 +01004744 /* we may need to add END_STREAM except for 1xx responses.
Willy Tarreau115e83b2018-12-01 19:17:53 +01004745 * FIXME: we should also set it when we know for sure that the
4746 * content-length is zero as well as on 204/304
4747 */
Christopher Faulet0b465482019-02-19 15:14:23 +01004748 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM &&
4749 (h2s->status >= 200 || h2s->status == 101))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004750 es_now = 1;
4751
Willy Tarreau927b88b2019-03-04 08:03:25 +01004752 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW)
Willy Tarreau115e83b2018-12-01 19:17:53 +01004753 es_now = 1;
4754
Willy Tarreau115e83b2018-12-01 19:17:53 +01004755 if (es_now)
4756 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
4757
4758 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02004759 TRACE_USER("sent H2 response", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
Willy Tarreaubcc45952019-05-26 10:05:50 +02004760 b_add(mbuf, outbuf.data);
Christopher Faulet0b465482019-02-19 15:14:23 +01004761
4762 /* indicates the HEADERS frame was sent, except for 1xx responses. For
4763 * 1xx responses, another HEADERS frame is expected.
4764 */
4765 if (h2s->status >= 200 || h2s->status == 101)
4766 h2s->flags |= H2_SF_HEADERS_SENT;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004767
Willy Tarreau115e83b2018-12-01 19:17:53 +01004768 if (es_now) {
4769 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02004770 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 +01004771 if (h2s->st == H2_SS_OPEN)
4772 h2s->st = H2_SS_HLOC;
4773 else
4774 h2s_close(h2s);
4775 }
4776
4777 /* OK we could properly deliver the response */
4778
4779 /* remove all header blocks including the EOH and compute the
4780 * corresponding size.
4781 *
4782 * FIXME: We should remove everything when es_now is set.
4783 */
4784 ret = 0;
4785 idx = htx_get_head(htx);
4786 blk = htx_get_blk(htx, idx);
4787 while (blk != blk_end) {
4788 ret += htx_get_blksz(blk);
4789 blk = htx_remove_blk(htx, blk);
4790 }
Willy Tarreauc5753ae2018-12-02 12:28:01 +01004791
Christopher Faulet316934d2019-05-15 14:22:48 +02004792 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
4793 ret += htx_get_blksz(blk_end);
Willy Tarreauc5753ae2018-12-02 12:28:01 +01004794 htx_remove_blk(htx, blk_end);
Christopher Faulet316934d2019-05-15 14:22:48 +02004795 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01004796 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02004797 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004798 return ret;
4799 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02004800 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
4801 goto retry;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004802 h2c->flags |= H2_CF_MUX_MFULL;
4803 h2s->flags |= H2_SF_BLK_MROOM;
4804 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004805 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 +01004806 goto end;
4807 fail:
4808 /* unparsable HTX messages, too large ones to be produced in the local
4809 * list etc go here (unrecoverable errors).
4810 */
4811 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
4812 ret = 0;
4813 goto end;
4814}
4815
Willy Tarreau80739692018-10-05 11:35:57 +02004816/* Try to send a HEADERS frame matching HTX request present in HTX message
4817 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
4818 * must check the stream's status to detect any error which might have happened
4819 * subsequently to a successful send. The htx blocks are automatically removed
4820 * from the message. The htx message is assumed to be valid since produced from
4821 * the internal code, hence it contains a start line, an optional series of
4822 * header blocks and an end of header, otherwise an invalid frame could be
4823 * emitted and the resulting htx message could be left in an inconsistent state.
4824 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004825static size_t h2s_bck_make_req_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau80739692018-10-05 11:35:57 +02004826{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004827 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau80739692018-10-05 11:35:57 +02004828 struct h2c *h2c = h2s->h2c;
4829 struct htx_blk *blk;
4830 struct htx_blk *blk_end;
4831 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02004832 struct buffer *mbuf;
Willy Tarreau80739692018-10-05 11:35:57 +02004833 struct htx_sl *sl;
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004834 struct ist meth, uri, auth;
Willy Tarreau80739692018-10-05 11:35:57 +02004835 enum htx_blk_type type;
4836 int es_now = 0;
4837 int ret = 0;
4838 int hdr;
4839 int idx;
4840
Willy Tarreau7838a792019-08-12 18:42:03 +02004841 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
4842
Willy Tarreau80739692018-10-05 11:35:57 +02004843 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004844 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02004845 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02004846 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02004847 return 0;
4848 }
4849
Willy Tarreau80739692018-10-05 11:35:57 +02004850 /* determine the first block which must not be deleted, blk_end may
4851 * be NULL if all blocks have to be deleted.
4852 */
4853 idx = htx_get_head(htx);
4854 blk_end = NULL;
4855 while (idx != -1) {
4856 type = htx_get_blk_type(htx_get_blk(htx, idx));
4857 idx = htx_get_next(htx, idx);
4858 if (type == HTX_BLK_EOH) {
4859 if (idx != -1)
4860 blk_end = htx_get_blk(htx, idx);
4861 break;
4862 }
4863 }
4864
4865 /* get the start line, we do have one */
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004866 blk = htx_get_head_blk(htx);
Christopher Fauletea009732019-11-18 15:50:25 +01004867 BUG_ON(!blk || htx_get_blk_type(blk) != HTX_BLK_REQ_SL);
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004868 ALREADY_CHECKED(blk);
4869 sl = htx_get_blk_ptr(htx, blk);
Willy Tarreau80739692018-10-05 11:35:57 +02004870 meth = htx_sl_req_meth(sl);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004871 uri = htx_sl_req_uri(sl);
4872 if (unlikely(uri.len == 0)) {
4873 TRACE_PROTO("no URI in HTX request", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
4874 goto fail;
4875 }
Willy Tarreau80739692018-10-05 11:35:57 +02004876
4877 /* and the rest of the headers, that we dump starting at header 0 */
4878 hdr = 0;
4879
Willy Tarreau8e162ee2018-12-06 14:07:27 +01004880 idx = htx_get_head(htx); // returns the SL that we skip
Willy Tarreau80739692018-10-05 11:35:57 +02004881 while ((idx = htx_get_next(htx, idx)) != -1) {
4882 blk = htx_get_blk(htx, idx);
4883 type = htx_get_blk_type(blk);
4884
4885 if (type == HTX_BLK_UNUSED)
4886 continue;
4887
4888 if (type != HTX_BLK_HDR)
4889 break;
4890
Willy Tarreau7838a792019-08-12 18:42:03 +02004891 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
4892 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 +02004893 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004894 }
Willy Tarreau80739692018-10-05 11:35:57 +02004895
4896 list[hdr].n = htx_get_blk_name(htx, blk);
4897 list[hdr].v = htx_get_blk_value(htx, blk);
Christopher Faulet67d58092019-10-02 10:51:38 +02004898
4899 /* Skip header if same name is used to add the server name */
4900 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name &&
4901 isteq(list[hdr].n, ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len)))
4902 continue;
4903
Willy Tarreau80739692018-10-05 11:35:57 +02004904 hdr++;
4905 }
4906
Christopher Faulet72ba6cd2019-09-24 16:20:05 +02004907 /* Now add the server name to a header (if requested) */
4908 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name) {
4909 struct server *srv = objt_server(h2c->conn->target);
4910
4911 if (srv) {
4912 list[hdr].n = ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len);
4913 list[hdr].v = ist(srv->id);
4914 hdr++;
4915 }
4916 }
4917
Willy Tarreau80739692018-10-05 11:35:57 +02004918 /* marker for end of headers */
4919 list[hdr].n = ist("");
4920
Willy Tarreau9c218e72019-05-26 10:08:28 +02004921 mbuf = br_tail(h2c->mbuf);
4922 retry:
4923 if (!h2_get_buf(h2c, mbuf)) {
4924 h2c->flags |= H2_CF_MUX_MALLOC;
4925 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02004926 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 +02004927 return 0;
4928 }
4929
Willy Tarreau80739692018-10-05 11:35:57 +02004930 chunk_reset(&outbuf);
4931
4932 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004933 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
4934 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02004935 break;
4936 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02004937 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau80739692018-10-05 11:35:57 +02004938 }
4939
4940 if (outbuf.size < 9)
4941 goto full;
4942
4943 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
4944 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
4945 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4946 outbuf.data = 9;
4947
4948 /* encode the method, which necessarily is the first one */
Willy Tarreaubdabc3a2018-12-10 18:25:11 +01004949 if (!hpack_encode_method(&outbuf, sl->info.req.meth, meth)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004950 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02004951 goto realign_again;
4952 goto full;
4953 }
4954
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004955 auth = ist(NULL);
4956
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004957 /* RFC7540 #8.3: the CONNECT method must have :
4958 * - :authority set to the URI part (host:port)
4959 * - :method set to CONNECT
4960 * - :scheme and :path omitted
4961 */
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004962 if (unlikely(sl->info.req.meth == HTTP_METH_CONNECT)) {
4963 auth = uri;
4964
4965 if (!hpack_encode_header(&outbuf, ist(":authority"), auth)) {
4966 /* output full */
4967 if (b_space_wraps(mbuf))
4968 goto realign_again;
4969 goto full;
4970 }
4971 } else {
4972 /* other methods need a :scheme. If an authority is known from
4973 * the request line, it must be sent, otherwise only host is
4974 * sent. Host is never sent as the authority.
4975 */
4976 struct ist scheme = { };
Christopher Faulet3b44c542019-06-14 10:46:51 +02004977
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004978 if (uri.ptr[0] != '/' && uri.ptr[0] != '*') {
4979 /* the URI seems to start with a scheme */
4980 int len = 1;
4981
4982 while (len < uri.len && uri.ptr[len] != ':')
4983 len++;
4984
4985 if (len + 2 < uri.len && uri.ptr[len + 1] == '/' && uri.ptr[len + 2] == '/') {
4986 /* make the uri start at the authority now */
4987 scheme.ptr = uri.ptr;
4988 scheme.len = len,
4989 uri.ptr += len + 3;
4990 uri.len -= len + 3;
4991
4992 /* find the auth part of the URI */
4993 auth.ptr = uri.ptr;
4994 auth.len = 0;
4995 while (auth.len < uri.len && auth.ptr[auth.len] != '/')
4996 auth.len++;
4997
4998 uri.ptr += auth.len;
4999 uri.len -= auth.len;
5000 }
5001 }
5002
5003 if (!scheme.len) {
5004 /* no explicit scheme, we're using an origin-form URI,
5005 * probably from an H1 request transcoded to H2 via an
5006 * external layer, then received as H2 without authority.
5007 * So we have to look up the scheme from the HTX flags.
5008 * In such a case only http and https are possible, and
5009 * https is the default (sent by browsers).
5010 */
5011 if ((sl->flags & (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP)) == (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP))
5012 scheme = ist("http");
5013 else
5014 scheme = ist("https");
5015 }
Christopher Faulet3b44c542019-06-14 10:46:51 +02005016
5017 if (!hpack_encode_scheme(&outbuf, scheme)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005018 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005019 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005020 goto realign_again;
5021 goto full;
5022 }
Willy Tarreau80739692018-10-05 11:35:57 +02005023
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005024 if (auth.len && !hpack_encode_header(&outbuf, ist(":authority"), auth)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005025 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005026 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005027 goto realign_again;
5028 goto full;
5029 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005030
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005031 /* encode the path. RFC7540#8.1.2.3: if path is empty it must
5032 * be sent as '/' or '*'.
5033 */
5034 if (unlikely(!uri.len)) {
5035 if (sl->info.req.meth == HTTP_METH_OPTIONS)
5036 uri = ist("*");
5037 else
5038 uri = ist("/");
Willy Tarreau053c1572019-02-01 16:13:59 +01005039 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005040
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005041 if (!hpack_encode_path(&outbuf, uri)) {
5042 /* output full */
5043 if (b_space_wraps(mbuf))
5044 goto realign_again;
5045 goto full;
5046 }
Willy Tarreau80739692018-10-05 11:35:57 +02005047 }
5048
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005049 /* encode all headers, stop at empty name. Host is only sent if we
5050 * do not provide an authority.
5051 */
Willy Tarreau80739692018-10-05 11:35:57 +02005052 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
5053 /* these ones do not exist in H2 and must be dropped. */
5054 if (isteq(list[hdr].n, ist("connection")) ||
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005055 (auth.len && isteq(list[hdr].n, ist("host"))) ||
Willy Tarreau80739692018-10-05 11:35:57 +02005056 isteq(list[hdr].n, ist("proxy-connection")) ||
5057 isteq(list[hdr].n, ist("keep-alive")) ||
5058 isteq(list[hdr].n, ist("upgrade")) ||
5059 isteq(list[hdr].n, ist("transfer-encoding")))
5060 continue;
5061
Christopher Faulet86d144c2019-08-14 16:32:25 +02005062 /* Skip all pseudo-headers */
5063 if (*(list[hdr].n.ptr) == ':')
5064 continue;
5065
Willy Tarreau80739692018-10-05 11:35:57 +02005066 if (isteq(list[hdr].n, ist("")))
5067 break; // end
5068
5069 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
5070 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005071 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005072 goto realign_again;
5073 goto full;
5074 }
5075 }
5076
Willy Tarreaucb985a42019-10-07 16:56:34 +02005077 /* update the frame's size */
5078 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5079
5080 if (outbuf.data > h2c->mfs + 9) {
5081 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5082 /* output full */
5083 if (b_space_wraps(mbuf))
5084 goto realign_again;
5085 goto full;
5086 }
5087 }
5088
Willy Tarreau80739692018-10-05 11:35:57 +02005089 /* we may need to add END_STREAM if we have no body :
5090 * - request already closed, or :
5091 * - no transfer-encoding, and :
5092 * - no content-length or content-length:0
5093 * Fixme: this doesn't take into account CONNECT requests.
5094 */
5095 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM)
5096 es_now = 1;
5097
5098 if (sl->flags & HTX_SL_F_BODYLESS)
5099 es_now = 1;
5100
Willy Tarreau927b88b2019-03-04 08:03:25 +01005101 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW)
Willy Tarreau80739692018-10-05 11:35:57 +02005102 es_now = 1;
5103
Willy Tarreau80739692018-10-05 11:35:57 +02005104 if (es_now)
5105 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5106
5107 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02005108 TRACE_USER("sent H2 request", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
Willy Tarreaubcc45952019-05-26 10:05:50 +02005109 b_add(mbuf, outbuf.data);
Willy Tarreau80739692018-10-05 11:35:57 +02005110 h2s->flags |= H2_SF_HEADERS_SENT;
5111 h2s->st = H2_SS_OPEN;
5112
Willy Tarreau80739692018-10-05 11:35:57 +02005113 if (es_now) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005114 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 +02005115 // trim any possibly pending data (eg: inconsistent content-length)
5116 h2s->flags |= H2_SF_ES_SENT;
5117 h2s->st = H2_SS_HLOC;
5118 }
5119
5120 /* remove all header blocks including the EOH and compute the
5121 * corresponding size.
5122 *
5123 * FIXME: We should remove everything when es_now is set.
5124 */
5125 ret = 0;
5126 idx = htx_get_head(htx);
5127 blk = htx_get_blk(htx, idx);
5128 while (blk != blk_end) {
5129 ret += htx_get_blksz(blk);
5130 blk = htx_remove_blk(htx, blk);
5131 }
5132
Christopher Faulet316934d2019-05-15 14:22:48 +02005133 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
5134 ret += htx_get_blksz(blk_end);
Willy Tarreau80739692018-10-05 11:35:57 +02005135 htx_remove_blk(htx, blk_end);
Christopher Faulet316934d2019-05-15 14:22:48 +02005136 }
Willy Tarreau80739692018-10-05 11:35:57 +02005137
5138 end:
5139 return ret;
5140 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005141 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5142 goto retry;
Willy Tarreau80739692018-10-05 11:35:57 +02005143 h2c->flags |= H2_CF_MUX_MFULL;
5144 h2s->flags |= H2_SF_BLK_MROOM;
5145 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005146 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 +02005147 goto end;
5148 fail:
5149 /* unparsable HTX messages, too large ones to be produced in the local
5150 * list etc go here (unrecoverable errors).
5151 */
5152 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5153 ret = 0;
5154 goto end;
5155}
5156
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005157/* Try to send a DATA frame matching HTTP response present in HTX structure
Willy Tarreau98de12a2018-12-12 07:03:00 +01005158 * present in <buf>, for stream <h2s>. Returns the number of bytes sent. The
5159 * caller must check the stream's status to detect any error which might have
5160 * happened subsequently to a successful send. Returns the number of data bytes
Christopher Faulet54b5e212019-06-04 10:08:28 +02005161 * consumed, or zero if nothing done. Note that EOM count for 1 byte.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005162 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005163static size_t h2s_frt_make_resp_data(struct h2s *h2s, struct buffer *buf, size_t count)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005164{
5165 struct h2c *h2c = h2s->h2c;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005166 struct htx *htx;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005167 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005168 struct buffer *mbuf;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005169 size_t total = 0;
5170 int es_now = 0;
5171 int bsize; /* htx block size */
5172 int fsize; /* h2 frame size */
5173 struct htx_blk *blk;
5174 enum htx_blk_type type;
5175 int idx;
5176
Willy Tarreau7838a792019-08-12 18:42:03 +02005177 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5178
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005179 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005180 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005181 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005182 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005183 goto end;
5184 }
5185
Willy Tarreau98de12a2018-12-12 07:03:00 +01005186 htx = htx_from_buf(buf);
5187
Christopher Faulet54b5e212019-06-04 10:08:28 +02005188 /* We only come here with HTX_BLK_DATA blocks. However, while looping,
5189 * we can meet an HTX_BLK_EOM block that we'll leave to the caller to
5190 * handle.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005191 */
5192
5193 new_frame:
Willy Tarreauee573762018-12-04 15:25:57 +01005194 if (!count || htx_is_empty(htx))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005195 goto end;
5196
5197 idx = htx_get_head(htx);
5198 blk = htx_get_blk(htx, idx);
Christopher Faulet54b5e212019-06-04 10:08:28 +02005199 type = htx_get_blk_type(blk); // DATA or EOM
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005200 bsize = htx_get_blksz(blk);
5201 fsize = bsize;
5202
Christopher Faulet54b5e212019-06-04 10:08:28 +02005203 if (type == HTX_BLK_EOM) {
Willy Tarreau7eeb10a2019-01-04 09:28:17 +01005204 if (h2s->flags & H2_SF_ES_SENT) {
5205 /* ES already sent */
5206 htx_remove_blk(htx, blk);
5207 total++; // EOM counts as one byte
5208 count--;
5209 goto end;
5210 }
5211 }
5212 else if (type != HTX_BLK_DATA)
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005213 goto end;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005214
Willy Tarreau9c218e72019-05-26 10:08:28 +02005215 mbuf = br_tail(h2c->mbuf);
5216 retry:
5217 if (!h2_get_buf(h2c, mbuf)) {
5218 h2c->flags |= H2_CF_MUX_MALLOC;
5219 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005220 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 +02005221 goto end;
5222 }
5223
Willy Tarreau98de12a2018-12-12 07:03:00 +01005224 /* Perform some optimizations to reduce the number of buffer copies.
5225 * First, if the mux's buffer is empty and the htx area contains
5226 * exactly one data block of the same size as the requested count, and
5227 * this count fits within the frame size, the stream's window size, and
5228 * the connection's window size, then it's possible to simply swap the
5229 * caller's buffer with the mux's output buffer and adjust offsets and
5230 * length to match the entire DATA HTX block in the middle. In this
5231 * case we perform a true zero-copy operation from end-to-end. This is
5232 * the situation that happens all the time with large files. Second, if
5233 * this is not possible, but the mux's output buffer is empty, we still
5234 * have an opportunity to avoid the copy to the intermediary buffer, by
5235 * making the intermediary buffer's area point to the output buffer's
5236 * area. In this case we want to skip the HTX header to make sure that
5237 * copies remain aligned and that this operation remains possible all
5238 * the time. This goes for headers, data blocks and any data extracted
5239 * from the HTX blocks.
5240 */
5241 if (unlikely(fsize == count &&
Christopher Faulet192c6a22019-06-11 16:32:24 +02005242 htx_nbblks(htx) == 1 && type == HTX_BLK_DATA &&
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005243 fsize <= h2s_mws(h2s) && fsize <= h2c->mws && fsize <= h2c->mfs)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005244 void *old_area = mbuf->area;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005245
Willy Tarreaubcc45952019-05-26 10:05:50 +02005246 if (b_data(mbuf)) {
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005247 /* Too bad there are data left there. We're willing to memcpy/memmove
5248 * up to 1/4 of the buffer, which means that it's OK to copy a large
5249 * frame into a buffer containing few data if it needs to be realigned,
5250 * and that it's also OK to copy few data without realigning. Otherwise
5251 * we'll pretend the mbuf is full and wait for it to become empty.
Willy Tarreau98de12a2018-12-12 07:03:00 +01005252 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005253 if (fsize + 9 <= b_room(mbuf) &&
5254 (b_data(mbuf) <= b_size(mbuf) / 4 ||
Willy Tarreau7838a792019-08-12 18:42:03 +02005255 (fsize <= b_size(mbuf) / 4 && fsize + 9 <= b_contig_space(mbuf)))) {
5256 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 +01005257 goto copy;
Willy Tarreau7838a792019-08-12 18:42:03 +02005258 }
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005259
Willy Tarreau9c218e72019-05-26 10:08:28 +02005260 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5261 goto retry;
5262
Willy Tarreau98de12a2018-12-12 07:03:00 +01005263 h2c->flags |= H2_CF_MUX_MFULL;
5264 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005265 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 +01005266 goto end;
5267 }
5268
5269 /* map an H2 frame to the HTX block so that we can put the
5270 * frame header there.
5271 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005272 *mbuf = b_make(buf->area, buf->size, sizeof(struct htx) + blk->addr - 9, fsize + 9);
5273 outbuf.area = b_head(mbuf);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005274
5275 /* prepend an H2 DATA frame header just before the DATA block */
5276 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5277 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5278 h2_set_frame_size(outbuf.area, fsize);
5279
5280 /* update windows */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005281 h2s->sws -= fsize;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005282 h2c->mws -= fsize;
5283
5284 /* and exchange with our old area */
5285 buf->area = old_area;
5286 buf->data = buf->head = 0;
5287 total += fsize;
Willy Tarreau7838a792019-08-12 18:42:03 +02005288
5289 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 +01005290 goto end;
5291 }
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005292
Willy Tarreau98de12a2018-12-12 07:03:00 +01005293 copy:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005294 /* for DATA and EOM we'll have to emit a frame, even if empty */
5295
5296 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005297 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5298 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005299 break;
5300 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005301 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005302 }
5303
5304 if (outbuf.size < 9) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02005305 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5306 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005307 h2c->flags |= H2_CF_MUX_MFULL;
5308 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005309 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005310 goto end;
5311 }
5312
5313 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
5314 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5315 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5316 outbuf.data = 9;
5317
5318 /* we have in <fsize> the exact number of bytes we need to copy from
5319 * the HTX buffer. We need to check this against the connection's and
5320 * the stream's send windows, and to ensure that this fits in the max
5321 * frame size and in the buffer's available space minus 9 bytes (for
5322 * the frame header). The connection's flow control is applied last so
5323 * that we can use a separate list of streams which are immediately
5324 * unblocked on window opening. Note: we don't implement padding.
5325 */
5326
5327 /* EOM is presented with bsize==1 but would lead to the emission of an
5328 * empty frame, thus we force it to zero here.
5329 */
5330 if (type == HTX_BLK_EOM)
5331 bsize = fsize = 0;
5332
5333 if (!fsize)
5334 goto send_empty;
5335
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005336 if (h2s_mws(h2s) <= 0) {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005337 h2s->flags |= H2_SF_BLK_SFCTL;
Willy Tarreauc234ae32019-05-13 17:56:11 +02005338 if (LIST_ADDED(&h2s->list))
Olivier Houchardbfe2a832019-05-10 14:02:21 +02005339 LIST_DEL_INIT(&h2s->list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +02005340 LIST_ADDQ(&h2c->blocked_list, &h2s->list);
Willy Tarreau7838a792019-08-12 18:42:03 +02005341 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 +01005342 goto end;
5343 }
5344
Willy Tarreauee573762018-12-04 15:25:57 +01005345 if (fsize > count)
5346 fsize = count;
5347
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005348 if (fsize > h2s_mws(h2s))
5349 fsize = h2s_mws(h2s); // >0
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005350
5351 if (h2c->mfs && fsize > h2c->mfs)
5352 fsize = h2c->mfs; // >0
5353
5354 if (fsize + 9 > outbuf.size) {
Willy Tarreau455d5682019-05-24 19:42:18 +02005355 /* It doesn't fit at once. If it at least fits once split and
5356 * the amount of data to move is low, let's defragment the
5357 * buffer now.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005358 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005359 if (b_space_wraps(mbuf) &&
5360 (fsize + 9 <= b_room(mbuf)) &&
5361 b_data(mbuf) <= MAX_DATA_REALIGN)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005362 goto realign_again;
5363 fsize = outbuf.size - 9;
5364
5365 if (fsize <= 0) {
5366 /* no need to send an empty frame here */
Willy Tarreau9c218e72019-05-26 10:08:28 +02005367 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5368 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005369 h2c->flags |= H2_CF_MUX_MFULL;
5370 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005371 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005372 goto end;
5373 }
5374 }
5375
5376 if (h2c->mws <= 0) {
5377 h2s->flags |= H2_SF_BLK_MFCTL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005378 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 +01005379 goto end;
5380 }
5381
5382 if (fsize > h2c->mws)
5383 fsize = h2c->mws;
5384
5385 /* now let's copy this this into the output buffer */
5386 memcpy(outbuf.area + 9, htx_get_blk_ptr(htx, blk), fsize);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005387 h2s->sws -= fsize;
Willy Tarreau0f799ca2018-12-04 15:20:11 +01005388 h2c->mws -= fsize;
Willy Tarreauee573762018-12-04 15:25:57 +01005389 count -= fsize;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005390
5391 send_empty:
5392 /* update the frame's size */
5393 h2_set_frame_size(outbuf.area, fsize);
5394
5395 /* FIXME: for now we only set the ES flag on empty DATA frames, once
5396 * meeting EOM. We should optimize this later.
5397 */
5398 if (type == HTX_BLK_EOM) {
Willy Tarreauee573762018-12-04 15:25:57 +01005399 total++; // EOM counts as one byte
5400 count--;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005401 es_now = 1;
5402 }
5403
5404 if (es_now)
5405 outbuf.area[4] |= H2_F_DATA_END_STREAM;
5406
5407 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005408 b_add(mbuf, fsize + 9);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005409
5410 /* consume incoming HTX block, including EOM */
5411 total += fsize;
5412 if (fsize == bsize) {
5413 htx_remove_blk(htx, blk);
Willy Tarreau7838a792019-08-12 18:42:03 +02005414 if (fsize) {
5415 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 +01005416 goto new_frame;
Willy Tarreau7838a792019-08-12 18:42:03 +02005417 }
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005418 } else {
5419 /* we've truncated this block */
5420 htx_cut_data_blk(htx, blk, fsize);
5421 }
5422
5423 if (es_now) {
5424 if (h2s->st == H2_SS_OPEN)
5425 h2s->st = H2_SS_HLOC;
5426 else
5427 h2s_close(h2s);
5428
5429 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005430 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 +01005431 }
5432
5433 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005434 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005435 return total;
5436}
5437
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005438/* Try to send a HEADERS frame matching HTX_BLK_TLR series of blocks present in
5439 * HTX message <htx> for the H2 stream <h2s>. Returns the number of bytes
5440 * processed. The caller must check the stream's status to detect any error
5441 * which might have happened subsequently to a successful send. The htx blocks
5442 * are automatically removed from the message. The htx message is assumed to be
5443 * valid since produced from the internal code. Processing stops when meeting
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005444 * the EOM, which is *not* removed. All trailers are processed at once and sent
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005445 * as a single frame. The ES flag is always set.
5446 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005447static size_t h2s_make_trailers(struct h2s *h2s, struct htx *htx)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005448{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005449 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005450 struct h2c *h2c = h2s->h2c;
5451 struct htx_blk *blk;
5452 struct htx_blk *blk_end;
5453 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005454 struct buffer *mbuf;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005455 enum htx_blk_type type;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005456 int ret = 0;
5457 int hdr;
5458 int idx;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005459
Willy Tarreau7838a792019-08-12 18:42:03 +02005460 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5461
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005462 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005463 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005464 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005465 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005466 goto end;
5467 }
5468
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005469 /* determine the first block which must not be deleted, blk_end may
5470 * be NULL if all blocks have to be deleted. also get trailers.
5471 */
5472 idx = htx_get_head(htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005473 blk_end = NULL;
5474
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005475 hdr = 0;
5476 while (idx != -1) {
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005477 blk = htx_get_blk(htx, idx);
5478 type = htx_get_blk_type(blk);
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005479 idx = htx_get_next(htx, idx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005480 if (type == HTX_BLK_UNUSED)
5481 continue;
5482
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005483 if (type == HTX_BLK_EOT) {
5484 if (idx != -1)
5485 blk_end = blk;
5486 break;
5487 }
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005488 if (type != HTX_BLK_TLR)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005489 break;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005490
Willy Tarreau7838a792019-08-12 18:42:03 +02005491 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5492 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 +01005493 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005494 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005495
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005496 list[hdr].n = htx_get_blk_name(htx, blk);
5497 list[hdr].v = htx_get_blk_value(htx, blk);
5498 hdr++;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005499 }
5500
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005501 /* marker for end of trailers */
5502 list[hdr].n = ist("");
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005503
Willy Tarreau9c218e72019-05-26 10:08:28 +02005504 mbuf = br_tail(h2c->mbuf);
5505 retry:
5506 if (!h2_get_buf(h2c, mbuf)) {
5507 h2c->flags |= H2_CF_MUX_MALLOC;
5508 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005509 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 +02005510 goto end;
5511 }
5512
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005513 chunk_reset(&outbuf);
5514
5515 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005516 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5517 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005518 break;
5519 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005520 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005521 }
5522
5523 if (outbuf.size < 9)
5524 goto full;
5525
5526 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4,ES=1 */
5527 memcpy(outbuf.area, "\x00\x00\x00\x01\x05", 5);
5528 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5529 outbuf.data = 9;
5530
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005531 /* encode all headers */
5532 for (idx = 0; idx < hdr; idx++) {
5533 /* these ones do not exist in H2 or must not appear in
5534 * trailers and must be dropped.
5535 */
5536 if (isteq(list[idx].n, ist("host")) ||
5537 isteq(list[idx].n, ist("content-length")) ||
5538 isteq(list[idx].n, ist("connection")) ||
5539 isteq(list[idx].n, ist("proxy-connection")) ||
5540 isteq(list[idx].n, ist("keep-alive")) ||
5541 isteq(list[idx].n, ist("upgrade")) ||
5542 isteq(list[idx].n, ist("te")) ||
5543 isteq(list[idx].n, ist("transfer-encoding")))
5544 continue;
5545
Christopher Faulet86d144c2019-08-14 16:32:25 +02005546 /* Skip all pseudo-headers */
5547 if (*(list[idx].n.ptr) == ':')
5548 continue;
5549
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005550 if (!hpack_encode_header(&outbuf, list[idx].n, list[idx].v)) {
5551 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005552 if (b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005553 goto realign_again;
5554 goto full;
5555 }
5556 }
5557
Willy Tarreau5121e5d2019-05-06 15:13:41 +02005558 if (outbuf.data == 9) {
5559 /* here we have a problem, we have nothing to emit (either we
5560 * received an empty trailers block followed or we removed its
5561 * contents above). Because of this we can't send a HEADERS
5562 * frame, so we have to cheat and instead send an empty DATA
5563 * frame conveying the ES flag.
Willy Tarreau67b8cae2019-02-21 18:16:35 +01005564 */
5565 outbuf.area[3] = H2_FT_DATA;
5566 outbuf.area[4] = H2_F_DATA_END_STREAM;
5567 }
5568
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005569 /* update the frame's size */
5570 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5571
Willy Tarreau572d9f52019-10-11 16:58:37 +02005572 if (outbuf.data > h2c->mfs + 9) {
5573 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5574 /* output full */
5575 if (b_space_wraps(mbuf))
5576 goto realign_again;
5577 goto full;
5578 }
5579 }
5580
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005581 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02005582 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 +02005583 b_add(mbuf, outbuf.data);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005584 h2s->flags |= H2_SF_ES_SENT;
5585
5586 if (h2s->st == H2_SS_OPEN)
5587 h2s->st = H2_SS_HLOC;
5588 else
5589 h2s_close(h2s);
5590
5591 /* OK we could properly deliver the response */
5592 done:
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005593 /* remove all header blocks till the end and compute the corresponding size. */
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005594 ret = 0;
5595 idx = htx_get_head(htx);
5596 blk = htx_get_blk(htx, idx);
5597 while (blk != blk_end) {
5598 ret += htx_get_blksz(blk);
5599 blk = htx_remove_blk(htx, blk);
5600 }
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005601
5602 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
5603 ret += htx_get_blksz(blk_end);
5604 htx_remove_blk(htx, blk_end);
5605 }
5606
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005607 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005608 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005609 return ret;
5610 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005611 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5612 goto retry;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005613 h2c->flags |= H2_CF_MUX_MFULL;
5614 h2s->flags |= H2_SF_BLK_MROOM;
5615 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005616 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 +01005617 goto end;
5618 fail:
5619 /* unparsable HTX messages, too large ones to be produced in the local
5620 * list etc go here (unrecoverable errors).
5621 */
5622 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5623 ret = 0;
5624 goto end;
5625}
5626
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005627/* Called from the upper layer, to subscribe to events, such as being able to send.
5628 * The <param> argument here is supposed to be a pointer to a wait_event struct
5629 * which will be passed to h2s->recv_wait or h2s->send_wait depending on the
5630 * event_type. The event_type must only be a combination of SUB_RETRY_RECV and
5631 * SUB_RETRY_SEND, other values will lead to -1 being returned. It always
5632 * returns 0 except for the error above.
5633 */
Olivier Houchard6ff20392018-07-17 18:46:31 +02005634static int h2_subscribe(struct conn_stream *cs, int event_type, void *param)
5635{
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005636 struct wait_event *sw;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005637 struct h2s *h2s = cs->ctx;
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02005638 struct h2c *h2c = h2s->h2c;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005639
Willy Tarreau7838a792019-08-12 18:42:03 +02005640 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005641 if (event_type & SUB_RETRY_RECV) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005642 TRACE_DEVEL("subscribe(recv)", H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02005643 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005644 BUG_ON(h2s->recv_wait != NULL || (sw->events & SUB_RETRY_RECV));
5645 sw->events |= SUB_RETRY_RECV;
5646 h2s->recv_wait = sw;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005647 event_type &= ~SUB_RETRY_RECV;
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005648 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005649 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005650 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2c->conn, h2s);
Olivier Houchard6ff20392018-07-17 18:46:31 +02005651 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005652 BUG_ON(h2s->send_wait != NULL || (sw->events & SUB_RETRY_SEND));
5653 sw->events |= SUB_RETRY_SEND;
5654 h2s->send_wait = sw;
5655 if (!(h2s->flags & H2_SF_BLK_SFCTL) &&
5656 !LIST_ADDED(&h2s->list)) {
5657 if (h2s->flags & H2_SF_BLK_MFCTL)
5658 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
5659 else
5660 LIST_ADDQ(&h2c->send_list, &h2s->list);
Olivier Houcharde1c6dbc2018-08-01 17:06:43 +02005661 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005662 event_type &= ~SUB_RETRY_SEND;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005663 }
Willy Tarreau7838a792019-08-12 18:42:03 +02005664 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005665 if (event_type != 0)
5666 return -1;
5667 return 0;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005668}
5669
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005670/* Called from the upper layer, to unsubscribe some events (undo h2_subscribe).
5671 * The <param> argument here is supposed to be a pointer to the same wait_event
5672 * struct that was passed to h2_subscribe() otherwise nothing will be changed.
5673 * It always returns zero.
5674 */
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005675static int h2_unsubscribe(struct conn_stream *cs, int event_type, void *param)
5676{
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005677 struct wait_event *sw;
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005678 struct h2s *h2s = cs->ctx;
5679
Willy Tarreau7838a792019-08-12 18:42:03 +02005680 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005681 if (event_type & SUB_RETRY_RECV) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005682 TRACE_DEVEL("unsubscribe(recv)", H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005683 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005684 BUG_ON(h2s->recv_wait != sw);
5685 sw->events &= ~SUB_RETRY_RECV;
5686 h2s->recv_wait = NULL;
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005687 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005688 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005689 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005690 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005691 BUG_ON(h2s->send_wait != sw);
5692 LIST_DEL(&h2s->list);
5693 LIST_INIT(&h2s->list);
5694 sw->events &= ~SUB_RETRY_SEND;
5695 /* We were about to send, make sure it does not happen */
5696 if (LIST_ADDED(&h2s->sending_list) &&
5697 h2s->send_wait != &h2s->wait_event) {
Olivier Houchard5a3671d2019-10-11 16:33:49 +02005698 /* This call should be ok, as only the thread responsible
5699 * for the tasklet should call unsubscribe.
5700 */
Willy Tarreau86eded62019-06-14 14:47:49 +02005701 tasklet_remove_from_tasklet_list(h2s->send_wait->tasklet);
Olivier Houchardf8338152019-05-14 17:50:32 +02005702 LIST_DEL_INIT(&h2s->sending_list);
Olivier Houchardd846c262018-10-19 17:24:29 +02005703 }
Olivier Houchardf8338152019-05-14 17:50:32 +02005704 h2s->send_wait = NULL;
Olivier Houchardd846c262018-10-19 17:24:29 +02005705 }
Willy Tarreau7838a792019-08-12 18:42:03 +02005706 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005707 return 0;
5708}
5709
5710
Olivier Houchard511efea2018-08-16 15:30:32 +02005711/* Called from the upper layer, to receive data */
5712static size_t h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
5713{
Olivier Houchard638b7992018-08-16 15:41:52 +02005714 struct h2s *h2s = cs->ctx;
Willy Tarreau082f5592018-11-25 08:03:32 +01005715 struct h2c *h2c = h2s->h2c;
Willy Tarreau86724e22018-12-01 23:19:43 +01005716 struct htx *h2s_htx = NULL;
5717 struct htx *buf_htx = NULL;
Olivier Houchard511efea2018-08-16 15:30:32 +02005718 size_t ret = 0;
5719
Willy Tarreau7838a792019-08-12 18:42:03 +02005720 TRACE_ENTER(H2_EV_STRM_RECV, h2c->conn, h2s);
5721
Olivier Houchard511efea2018-08-16 15:30:32 +02005722 /* transfer possibly pending data to the upper layer */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005723 h2s_htx = htx_from_buf(&h2s->rxbuf);
5724 if (htx_is_empty(h2s_htx)) {
5725 /* Here htx_to_buf() will set buffer data to 0 because
5726 * the HTX is empty.
5727 */
5728 htx_to_buf(h2s_htx, &h2s->rxbuf);
5729 goto end;
5730 }
Willy Tarreau7196dd62019-03-05 10:51:11 +01005731
Christopher Faulet9b79a102019-07-15 11:22:56 +02005732 ret = h2s_htx->data;
5733 buf_htx = htx_from_buf(buf);
Willy Tarreau7196dd62019-03-05 10:51:11 +01005734
Christopher Faulet9b79a102019-07-15 11:22:56 +02005735 /* <buf> is empty and the message is small enough, swap the
5736 * buffers. */
5737 if (htx_is_empty(buf_htx) && htx_used_space(h2s_htx) <= count) {
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005738 htx_to_buf(buf_htx, buf);
5739 htx_to_buf(h2s_htx, &h2s->rxbuf);
Christopher Faulet9b79a102019-07-15 11:22:56 +02005740 b_xfer(buf, &h2s->rxbuf, b_data(&h2s->rxbuf));
5741 goto end;
Willy Tarreau86724e22018-12-01 23:19:43 +01005742 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02005743
5744 htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_EOM);
5745
5746 if (h2s_htx->flags & HTX_FL_PARSING_ERROR) {
5747 buf_htx->flags |= HTX_FL_PARSING_ERROR;
5748 if (htx_is_empty(buf_htx))
5749 cs->flags |= CS_FL_EOI;
Willy Tarreau86724e22018-12-01 23:19:43 +01005750 }
Olivier Houchard511efea2018-08-16 15:30:32 +02005751
Christopher Faulet9b79a102019-07-15 11:22:56 +02005752 buf_htx->extra = (h2s_htx->extra ? (h2s_htx->data + h2s_htx->extra) : 0);
5753 htx_to_buf(buf_htx, buf);
5754 htx_to_buf(h2s_htx, &h2s->rxbuf);
5755 ret -= h2s_htx->data;
5756
Christopher Faulet37070b22019-02-14 15:12:14 +01005757 end:
Olivier Houchard638b7992018-08-16 15:41:52 +02005758 if (b_data(&h2s->rxbuf))
Olivier Houchardd247be02018-12-06 16:22:29 +01005759 cs->flags |= (CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02005760 else {
Olivier Houchardd247be02018-12-06 16:22:29 +01005761 cs->flags &= ~(CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Christopher Fauletfa922f02019-05-07 10:55:17 +02005762 if (h2s->flags & H2_SF_ES_RCVD)
5763 cs->flags |= CS_FL_EOI;
Willy Tarreau76c83822019-06-15 09:55:50 +02005764 if (conn_xprt_read0_pending(h2c->conn) || h2s->st == H2_SS_CLOSED)
Olivier Houchard511efea2018-08-16 15:30:32 +02005765 cs->flags |= CS_FL_EOS;
Olivier Houchard71748cb2018-12-17 14:16:46 +01005766 if (cs->flags & CS_FL_ERR_PENDING)
5767 cs->flags |= CS_FL_ERROR;
Olivier Houchard638b7992018-08-16 15:41:52 +02005768 if (b_size(&h2s->rxbuf)) {
5769 b_free(&h2s->rxbuf);
5770 offer_buffers(NULL, tasks_run_queue);
5771 }
Olivier Houchard511efea2018-08-16 15:30:32 +02005772 }
5773
Willy Tarreau082f5592018-11-25 08:03:32 +01005774 if (ret && h2c->dsi == h2s->id) {
5775 /* demux is blocking on this stream's buffer */
5776 h2c->flags &= ~H2_CF_DEM_SFULL;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02005777 h2c_restart_reading(h2c, 1);
Willy Tarreau082f5592018-11-25 08:03:32 +01005778 }
Christopher Faulet37070b22019-02-14 15:12:14 +01005779
Willy Tarreau7838a792019-08-12 18:42:03 +02005780 TRACE_LEAVE(H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard511efea2018-08-16 15:30:32 +02005781 return ret;
5782}
5783
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005784/* stops all senders of this connection for example when the mux buffer is full.
5785 * They are moved from the sending_list to either fctl_list or send_list.
5786 */
Olivier Houchardd846c262018-10-19 17:24:29 +02005787static void h2_stop_senders(struct h2c *h2c)
5788{
5789 struct h2s *h2s, *h2s_back;
5790
Olivier Houchardd360ac62019-03-22 17:37:16 +01005791 list_for_each_entry_safe(h2s, h2s_back, &h2c->sending_list, sending_list) {
5792 LIST_DEL_INIT(&h2s->sending_list);
Olivier Houchard5a3671d2019-10-11 16:33:49 +02005793 /* XXX: This won't work when/if streams are running on different
5794 * threads, so we will have to find another way to prevent
5795 * tasklets to run when we can no longer send data. The best
5796 * may be to only wake enough tasklets to fill the buffer.
5797 */
Willy Tarreau86eded62019-06-14 14:47:49 +02005798 tasklet_remove_from_tasklet_list(h2s->send_wait->tasklet);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005799 h2s->send_wait->events |= SUB_RETRY_SEND;
Olivier Houchardd846c262018-10-19 17:24:29 +02005800 }
5801}
5802
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005803/* Called from the upper layer, to send data from buffer <buf> for no more than
5804 * <count> bytes. Returns the number of bytes effectively sent. Some status
5805 * flags may be updated on the conn_stream.
5806 */
Christopher Fauletd44a9b32018-07-27 11:59:41 +02005807static size_t h2_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
Willy Tarreau62f52692017-10-08 23:01:42 +02005808{
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005809 struct h2s *h2s = cs->ctx;
Willy Tarreau1dc41e72018-06-14 13:21:28 +02005810 size_t total = 0;
Willy Tarreau5dd17352018-06-14 13:33:30 +02005811 size_t ret;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005812 struct htx *htx;
5813 struct htx_blk *blk;
5814 enum htx_blk_type btype;
5815 uint32_t bsize;
5816 int32_t idx;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005817
Willy Tarreau7838a792019-08-12 18:42:03 +02005818 TRACE_ENTER(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
5819
Olivier Houchardd360ac62019-03-22 17:37:16 +01005820 /* If we were not just woken because we wanted to send but couldn't,
5821 * and there's somebody else that is waiting to send, do nothing,
5822 * we will subscribe later and be put at the end of the list
5823 */
Willy Tarreauc234ae32019-05-13 17:56:11 +02005824 if (!LIST_ADDED(&h2s->sending_list) &&
Willy Tarreau7838a792019-08-12 18:42:03 +02005825 (!LIST_ISEMPTY(&h2s->h2c->send_list) || !LIST_ISEMPTY(&h2s->h2c->fctl_list))) {
5826 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 +01005827 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005828 }
Olivier Houchard998410a2019-04-15 19:23:37 +02005829 LIST_DEL_INIT(&h2s->sending_list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01005830
Olivier Houchard998410a2019-04-15 19:23:37 +02005831 /* We couldn't set it to NULL before, because we needed it in case
5832 * we had to cancel the tasklet
5833 */
5834 h2s->send_wait = NULL;
5835
Willy Tarreau7838a792019-08-12 18:42:03 +02005836 if (h2s->h2c->st0 < H2_CS_FRAME_H) {
5837 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 +02005838 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005839 }
Willy Tarreau6bf641a2018-10-08 09:43:03 +02005840
Willy Tarreaucab22952019-10-31 15:48:18 +01005841 if (h2s->h2c->st0 >= H2_CS_ERROR) {
5842 cs->flags |= CS_FL_ERROR;
5843 TRACE_DEVEL("connection is in error, leaving in error", H2_EV_H2S_SEND|H2_EV_H2S_BLK|H2_EV_H2S_ERR|H2_EV_STRM_ERR, h2s->h2c->conn, h2s);
5844 return 0;
5845 }
5846
Christopher Faulet9b79a102019-07-15 11:22:56 +02005847 htx = htx_from_buf(buf);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005848
Willy Tarreau0bad0432018-06-14 16:54:01 +02005849 if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count)
Willy Tarreauc4312d32017-11-07 12:01:53 +01005850 h2s->flags |= H2_SF_OUTGOING_DATA;
5851
Willy Tarreau751f2d02018-10-05 09:35:00 +02005852 if (h2s->id == 0) {
5853 int32_t id = h2c_get_next_sid(h2s->h2c);
5854
5855 if (id < 0) {
Willy Tarreau751f2d02018-10-05 09:35:00 +02005856 cs->flags |= CS_FL_ERROR;
Willy Tarreau7838a792019-08-12 18:42:03 +02005857 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 +02005858 return 0;
5859 }
5860
5861 eb32_delete(&h2s->by_id);
5862 h2s->by_id.key = h2s->id = id;
5863 h2s->h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01005864 h2s->h2c->nb_reserved--;
Willy Tarreau751f2d02018-10-05 09:35:00 +02005865 eb32_insert(&h2s->h2c->streams_by_id, &h2s->by_id);
5866 }
5867
Christopher Faulet9b79a102019-07-15 11:22:56 +02005868 while (h2s->st < H2_SS_HLOC && !(h2s->flags & H2_SF_BLK_ANY) &&
5869 count && !htx_is_empty(htx)) {
5870 idx = htx_get_head(htx);
5871 blk = htx_get_blk(htx, idx);
5872 btype = htx_get_blk_type(blk);
5873 bsize = htx_get_blksz(blk);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005874
Christopher Faulet9b79a102019-07-15 11:22:56 +02005875 switch (btype) {
Willy Tarreau80739692018-10-05 11:35:57 +02005876 case HTX_BLK_REQ_SL:
5877 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005878 ret = h2s_bck_make_req_headers(h2s, htx);
Willy Tarreau80739692018-10-05 11:35:57 +02005879 if (ret > 0) {
5880 total += ret;
5881 count -= ret;
5882 if (ret < bsize)
5883 goto done;
5884 }
5885 break;
5886
Willy Tarreau115e83b2018-12-01 19:17:53 +01005887 case HTX_BLK_RES_SL:
5888 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005889 ret = h2s_frt_make_resp_headers(h2s, htx);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005890 if (ret > 0) {
5891 total += ret;
5892 count -= ret;
5893 if (ret < bsize)
5894 goto done;
5895 }
5896 break;
5897
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005898 case HTX_BLK_DATA:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005899 case HTX_BLK_EOM:
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005900 /* all these cause the emission of a DATA frame (possibly empty).
5901 * This EOM necessarily is one before trailers, as the EOM following
5902 * trailers would have been consumed by the trailers parser.
5903 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005904 ret = h2s_frt_make_resp_data(h2s, buf, count);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005905 if (ret > 0) {
Willy Tarreau98de12a2018-12-12 07:03:00 +01005906 htx = htx_from_buf(buf);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005907 total += ret;
5908 count -= ret;
5909 if (ret < bsize)
5910 goto done;
5911 }
5912 break;
5913
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005914 case HTX_BLK_TLR:
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005915 case HTX_BLK_EOT:
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005916 /* This is the first trailers block, all the subsequent ones AND
5917 * the EOM will be swallowed by the parser.
5918 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005919 ret = h2s_make_trailers(h2s, htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005920 if (ret > 0) {
5921 total += ret;
5922 count -= ret;
5923 if (ret < bsize)
5924 goto done;
5925 }
5926 break;
5927
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005928 default:
5929 htx_remove_blk(htx, blk);
5930 total += bsize;
5931 count -= bsize;
5932 break;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005933 }
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005934 }
5935
Christopher Faulet9b79a102019-07-15 11:22:56 +02005936 done:
Willy Tarreau2b778482019-05-06 15:00:22 +02005937 if (h2s->st >= H2_SS_HLOC) {
Willy Tarreau00610962018-07-19 10:58:28 +02005938 /* trim any possibly pending data after we close (extra CR-LF,
5939 * unprocessed trailers, abnormal extra data, ...)
5940 */
Willy Tarreau0bad0432018-06-14 16:54:01 +02005941 total += count;
5942 count = 0;
Willy Tarreau00610962018-07-19 10:58:28 +02005943 }
5944
Willy Tarreauc6795ca2017-11-07 09:43:06 +01005945 /* RST are sent similarly to frame acks */
Willy Tarreau02492192017-12-07 15:59:29 +01005946 if (h2s->st == H2_SS_ERROR || h2s->flags & H2_SF_RST_RCVD) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005947 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 +01005948 cs_set_error(cs);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01005949 if (h2s_send_rst_stream(h2s->h2c, h2s) > 0)
Willy Tarreau00dd0782018-03-01 16:31:34 +01005950 h2s_close(h2s);
Willy Tarreauc6795ca2017-11-07 09:43:06 +01005951 }
5952
Christopher Faulet9b79a102019-07-15 11:22:56 +02005953 htx_to_buf(htx, buf);
Olivier Houchardd846c262018-10-19 17:24:29 +02005954
5955 /* The mux is full, cancel the pending tasks */
5956 if ((h2s->h2c->flags & H2_CF_MUX_BLOCK_ANY) ||
Willy Tarreau7838a792019-08-12 18:42:03 +02005957 (h2s->flags & H2_SF_BLK_MBUSY)) {
5958 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 +02005959 h2_stop_senders(h2s->h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02005960 }
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005961
Olivier Houchard7505f942018-08-21 18:10:44 +02005962 if (total > 0) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005963 if (!(h2s->h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau7838a792019-08-12 18:42:03 +02005964 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 +02005965 tasklet_wakeup(h2s->h2c->wait_event.tasklet);
Olivier Houchardd846c262018-10-19 17:24:29 +02005966
Olivier Houchard7505f942018-08-21 18:10:44 +02005967 }
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01005968 /* If we're waiting for flow control, and we got a shutr on the
5969 * connection, we will never be unlocked, so add an error on
5970 * the conn_stream.
5971 */
5972 if (conn_xprt_read0_pending(h2s->h2c->conn) &&
5973 !b_data(&h2s->h2c->dbuf) &&
5974 (h2s->flags & (H2_SF_BLK_SFCTL | H2_SF_BLK_MFCTL))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005975 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 +01005976 if (cs->flags & CS_FL_EOS)
5977 cs->flags |= CS_FL_ERROR;
5978 else
5979 cs->flags |= CS_FL_ERR_PENDING;
5980 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02005981
5982 if (total > 0 && !(h2s->flags & H2_SF_BLK_SFCTL)) {
5983 /* Ok we managed to send something, leave the send_list if we were still there */
Olivier Houchardd360ac62019-03-22 17:37:16 +01005984 LIST_DEL_INIT(&h2s->list);
5985 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02005986
Willy Tarreau7838a792019-08-12 18:42:03 +02005987 TRACE_LEAVE(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005988 return total;
Willy Tarreau62f52692017-10-08 23:01:42 +02005989}
5990
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005991/* for debugging with CLI's "show fd" command */
Willy Tarreau83061a82018-07-13 11:56:34 +02005992static void h2_show_fd(struct buffer *msg, struct connection *conn)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005993{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01005994 struct h2c *h2c = conn->ctx;
Willy Tarreau987c0632018-12-18 10:32:05 +01005995 struct h2s *h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005996 struct eb32_node *node;
5997 int fctl_cnt = 0;
5998 int send_cnt = 0;
5999 int tree_cnt = 0;
6000 int orph_cnt = 0;
Willy Tarreau60f62682019-05-26 11:32:27 +02006001 struct buffer *hmbuf, *tmbuf;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006002
6003 if (!h2c)
6004 return;
6005
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006006 list_for_each_entry(h2s, &h2c->fctl_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006007 fctl_cnt++;
6008
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006009 list_for_each_entry(h2s, &h2c->send_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006010 send_cnt++;
6011
Willy Tarreau3af37712018-12-18 14:34:41 +01006012 h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006013 node = eb32_first(&h2c->streams_by_id);
6014 while (node) {
6015 h2s = container_of(node, struct h2s, by_id);
6016 tree_cnt++;
6017 if (!h2s->cs)
6018 orph_cnt++;
6019 node = eb32_next(node);
6020 }
6021
Willy Tarreau60f62682019-05-26 11:32:27 +02006022 hmbuf = br_head(h2c->mbuf);
Willy Tarreaubcc45952019-05-26 10:05:50 +02006023 tmbuf = br_tail(h2c->mbuf);
Willy Tarreauab2ec452019-08-30 07:07:08 +02006024 chunk_appendf(msg, " h2c.st0=%s .err=%d .maxid=%d .lastid=%d .flg=0x%04x"
Willy Tarreau987c0632018-12-18 10:32:05 +01006025 " .nbst=%u .nbcs=%u .fctl_cnt=%d .send_cnt=%d .tree_cnt=%d"
Willy Tarreau60f62682019-05-26 11:32:27 +02006026 " .orph_cnt=%d .sub=%d .dsi=%d .dbuf=%u@%p+%u/%u .msi=%d"
6027 " .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]",
Willy Tarreauab2ec452019-08-30 07:07:08 +02006028 h2c_st_to_str(h2c->st0), h2c->errcode, h2c->max_id, h2c->last_sid, h2c->flags,
Willy Tarreau616ac812018-07-24 14:12:42 +02006029 h2c->nb_streams, h2c->nb_cs, fctl_cnt, send_cnt, tree_cnt, orph_cnt,
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006030 h2c->wait_event.events, h2c->dsi,
Willy Tarreau987c0632018-12-18 10:32:05 +01006031 (unsigned int)b_data(&h2c->dbuf), b_orig(&h2c->dbuf),
6032 (unsigned int)b_head_ofs(&h2c->dbuf), (unsigned int)b_size(&h2c->dbuf),
6033 h2c->msi,
Willy Tarreau60f62682019-05-26 11:32:27 +02006034 br_head_idx(h2c->mbuf), br_tail_idx(h2c->mbuf), br_size(h2c->mbuf),
6035 (unsigned int)b_data(hmbuf), b_orig(hmbuf),
6036 (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf),
Willy Tarreaubcc45952019-05-26 10:05:50 +02006037 (unsigned int)b_data(tmbuf), b_orig(tmbuf),
6038 (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf));
Willy Tarreau987c0632018-12-18 10:32:05 +01006039
6040 if (h2s) {
Willy Tarreauab2ec452019-08-30 07:07:08 +02006041 chunk_appendf(msg, " last_h2s=%p .id=%d .st=%s.flg=0x%04x .rxbuf=%u@%p+%u/%u .cs=%p",
6042 h2s, h2s->id, h2s_st_to_str(h2s->st), h2s->flags,
Willy Tarreau987c0632018-12-18 10:32:05 +01006043 (unsigned int)b_data(&h2s->rxbuf), b_orig(&h2s->rxbuf),
6044 (unsigned int)b_head_ofs(&h2s->rxbuf), (unsigned int)b_size(&h2s->rxbuf),
6045 h2s->cs);
6046 if (h2s->cs)
6047 chunk_appendf(msg, " .cs.flg=0x%08x .cs.data=%p",
6048 h2s->cs->flags, h2s->cs->data);
6049 }
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006050}
Willy Tarreau62f52692017-10-08 23:01:42 +02006051
6052/*******************************************************/
6053/* functions below are dedicated to the config parsers */
6054/*******************************************************/
6055
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006056/* config parser for global "tune.h2.header-table-size" */
6057static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx,
6058 struct proxy *defpx, const char *file, int line,
6059 char **err)
6060{
6061 if (too_many_args(1, args, err, NULL))
6062 return -1;
6063
6064 h2_settings_header_table_size = atoi(args[1]);
6065 if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) {
6066 memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]);
6067 return -1;
6068 }
6069 return 0;
6070}
Willy Tarreau62f52692017-10-08 23:01:42 +02006071
Willy Tarreaue6baec02017-07-27 11:45:11 +02006072/* config parser for global "tune.h2.initial-window-size" */
6073static int h2_parse_initial_window_size(char **args, int section_type, struct proxy *curpx,
6074 struct proxy *defpx, const char *file, int line,
6075 char **err)
6076{
6077 if (too_many_args(1, args, err, NULL))
6078 return -1;
6079
6080 h2_settings_initial_window_size = atoi(args[1]);
6081 if (h2_settings_initial_window_size < 0) {
6082 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6083 return -1;
6084 }
6085 return 0;
6086}
6087
Willy Tarreau5242ef82017-07-27 11:47:28 +02006088/* config parser for global "tune.h2.max-concurrent-streams" */
6089static int h2_parse_max_concurrent_streams(char **args, int section_type, struct proxy *curpx,
6090 struct proxy *defpx, const char *file, int line,
6091 char **err)
6092{
6093 if (too_many_args(1, args, err, NULL))
6094 return -1;
6095
6096 h2_settings_max_concurrent_streams = atoi(args[1]);
Willy Tarreau5a490b62019-01-31 10:39:51 +01006097 if ((int)h2_settings_max_concurrent_streams < 0) {
Willy Tarreau5242ef82017-07-27 11:47:28 +02006098 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6099 return -1;
6100 }
6101 return 0;
6102}
6103
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006104/* config parser for global "tune.h2.max-frame-size" */
6105static int h2_parse_max_frame_size(char **args, int section_type, struct proxy *curpx,
6106 struct proxy *defpx, const char *file, int line,
6107 char **err)
6108{
6109 if (too_many_args(1, args, err, NULL))
6110 return -1;
6111
6112 h2_settings_max_frame_size = atoi(args[1]);
6113 if (h2_settings_max_frame_size < 16384 || h2_settings_max_frame_size > 16777215) {
6114 memprintf(err, "'%s' expects a numeric value between 16384 and 16777215.", args[0]);
6115 return -1;
6116 }
6117 return 0;
6118}
6119
Willy Tarreau62f52692017-10-08 23:01:42 +02006120
6121/****************************************/
6122/* MUX initialization and instanciation */
6123/***************************************/
6124
6125/* The mux operations */
Willy Tarreau680b2bd2018-11-27 07:30:17 +01006126static const struct mux_ops h2_ops = {
Willy Tarreau62f52692017-10-08 23:01:42 +02006127 .init = h2_init,
Olivier Houchard21df6cc2018-09-14 23:21:44 +02006128 .wake = h2_wake,
Willy Tarreau62f52692017-10-08 23:01:42 +02006129 .snd_buf = h2_snd_buf,
Olivier Houchard511efea2018-08-16 15:30:32 +02006130 .rcv_buf = h2_rcv_buf,
Olivier Houchard6ff20392018-07-17 18:46:31 +02006131 .subscribe = h2_subscribe,
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006132 .unsubscribe = h2_unsubscribe,
Willy Tarreau62f52692017-10-08 23:01:42 +02006133 .attach = h2_attach,
Willy Tarreaufafd3982018-11-18 21:29:20 +01006134 .get_first_cs = h2_get_first_cs,
Willy Tarreau62f52692017-10-08 23:01:42 +02006135 .detach = h2_detach,
Olivier Houchard060ed432018-11-06 16:32:42 +01006136 .destroy = h2_destroy,
Olivier Houchardd540b362018-11-05 18:37:53 +01006137 .avail_streams = h2_avail_streams,
Willy Tarreau00f18a32019-01-26 12:19:01 +01006138 .used_streams = h2_used_streams,
Willy Tarreau62f52692017-10-08 23:01:42 +02006139 .shutr = h2_shutr,
6140 .shutw = h2_shutw,
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02006141 .ctl = h2_ctl,
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006142 .show_fd = h2_show_fd,
Christopher Faulet9b79a102019-07-15 11:22:56 +02006143 .flags = MX_FL_CLEAN_ABRT|MX_FL_HTX,
Willy Tarreau62f52692017-10-08 23:01:42 +02006144 .name = "H2",
6145};
6146
Christopher Faulet32f61c02018-04-10 14:33:41 +02006147static struct mux_proto_list mux_proto_h2 =
Christopher Fauletc985f6c2019-07-15 11:42:52 +02006148 { .token = IST("h2"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BOTH, .mux = &h2_ops };
Willy Tarreau62f52692017-10-08 23:01:42 +02006149
Willy Tarreau0108d902018-11-25 19:14:37 +01006150INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2);
6151
Willy Tarreau62f52692017-10-08 23:01:42 +02006152/* config keyword parsers */
6153static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006154 { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size },
Willy Tarreaue6baec02017-07-27 11:45:11 +02006155 { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size },
Willy Tarreau5242ef82017-07-27 11:47:28 +02006156 { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006157 { CFG_GLOBAL, "tune.h2.max-frame-size", h2_parse_max_frame_size },
Willy Tarreau62f52692017-10-08 23:01:42 +02006158 { 0, NULL, NULL }
6159}};
6160
Willy Tarreau0108d902018-11-25 19:14:37 +01006161INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);