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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
Willy Tarreaudfd3de82020-06-04 23:46:14 +020013#include <import/eb32tree.h>
Willy Tarreau4c7e4b72020-05-27 12:58:42 +020014#include <haproxy/api.h>
Willy Tarreau6be78492020-06-05 00:00:29 +020015#include <haproxy/cfgparse.h>
Willy Tarreau7ea393d2020-06-04 18:02:10 +020016#include <haproxy/connection.h>
Willy Tarreaubf073142020-06-03 12:04:01 +020017#include <haproxy/h2.h>
Willy Tarreaube327fa2020-06-03 09:09:57 +020018#include <haproxy/hpack-dec.h>
19#include <haproxy/hpack-enc.h>
20#include <haproxy/hpack-tbl.h>
Willy Tarreau87735332020-06-04 09:08:41 +020021#include <haproxy/http_htx.h>
Willy Tarreau16f958c2020-06-03 08:44:35 +020022#include <haproxy/htx.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020023#include <haproxy/istbuf.h>
Willy Tarreau36979d92020-06-05 17:27:29 +020024#include <haproxy/log.h>
Willy Tarreau6131d6a2020-06-02 16:48:09 +020025#include <haproxy/net_helper.h>
Willy Tarreau48d25b32020-06-04 18:58:52 +020026#include <haproxy/session-t.h>
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +010027#include <haproxy/stats.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020028#include <haproxy/stream.h>
Willy Tarreau5e539c92020-06-04 20:45:39 +020029#include <haproxy/stream_interface.h>
Willy Tarreauc6d61d72020-06-04 19:02:42 +020030#include <haproxy/trace.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
Christopher Fauleta9cc1e82021-07-26 12:06:53 +020061 // (SHORT_READ is also excluded)
62
Christopher Faulet484f10a2021-11-10 17:50:10 +010063#define H2_CF_DEM_SHORT_READ 0x00000200 // demux blocked on incomplete frame
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020064
Willy Tarreau081d4722017-05-16 21:51:05 +020065/* other flags */
Willy Tarreauf2101912018-07-19 10:11:38 +020066#define H2_CF_GOAWAY_SENT 0x00001000 // a GOAWAY frame was successfully sent
67#define H2_CF_GOAWAY_FAILED 0x00002000 // a GOAWAY frame failed to be sent
68#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 +020069#define H2_CF_IS_BACK 0x00008000 // this is an outgoing connection
Willy Tarreau3d4631f2021-01-20 10:53:13 +010070#define H2_CF_WINDOW_OPENED 0x00010000 // demux increased window already advertised
71#define H2_CF_RCVD_SHUT 0x00020000 // a recv() attempt already failed on a shutdown
72#define H2_CF_END_REACHED 0x00040000 // pending data too short with RCVD_SHUT present
Willy Tarreau081d4722017-05-16 21:51:05 +020073
Amaury Denoyelle68993a12021-10-18 09:43:29 +020074#define H2_CF_RCVD_RFC8441 0x00100000 // settings from RFC8441 has been received indicating support for Extended CONNECT
Willy Tarreau8a4dca02022-01-13 16:00:12 +010075#define H2_CF_SHTS_UPDATED 0x00200000 // SETTINGS_HEADER_TABLE_SIZE updated
76#define H2_CF_DTSU_EMITTED 0x00400000 // HPACK Dynamic Table Size Update opcode emitted
Amaury Denoyelle68993a12021-10-18 09:43:29 +020077
Willy Tarreau5ab6b572017-09-22 08:05:00 +020078/* H2 connection state, in h2c->st0 */
79enum h2_cs {
80 H2_CS_PREFACE, // init done, waiting for connection preface
81 H2_CS_SETTINGS1, // preface OK, waiting for first settings frame
82 H2_CS_FRAME_H, // first settings frame ok, waiting for frame header
83 H2_CS_FRAME_P, // frame header OK, waiting for frame payload
Willy Tarreaua20a5192017-12-27 11:02:06 +010084 H2_CS_FRAME_A, // frame payload OK, trying to send ACK frame
85 H2_CS_FRAME_E, // frame payload OK, trying to send RST frame
Willy Tarreau5ab6b572017-09-22 08:05:00 +020086 H2_CS_ERROR, // send GOAWAY(errcode) and close the connection ASAP
87 H2_CS_ERROR2, // GOAWAY(errcode) sent, close the connection ASAP
88 H2_CS_ENTRIES // must be last
89} __attribute__((packed));
90
Willy Tarreau51330962019-05-26 09:38:07 +020091
Willy Tarreau9c218e72019-05-26 10:08:28 +020092/* 32 buffers: one for the ring's root, rest for the mbuf itself */
93#define H2C_MBUF_CNT 32
Willy Tarreau51330962019-05-26 09:38:07 +020094
Willy Tarreau5ab6b572017-09-22 08:05:00 +020095/* H2 connection descriptor */
96struct h2c {
97 struct connection *conn;
98
99 enum h2_cs st0; /* mux state */
100 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
101
102 /* 16 bit hole here */
103 uint32_t flags; /* connection flags: H2_CF_* */
Willy Tarreau2e2083a2019-01-31 10:34:07 +0100104 uint32_t streams_limit; /* maximum number of concurrent streams the peer supports */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200105 int32_t max_id; /* highest ID known on this connection, <0 before preface */
106 uint32_t rcvd_c; /* newly received data to ACK for the connection */
107 uint32_t rcvd_s; /* newly received data to ACK for the current stream (dsi) */
108
109 /* states for the demux direction */
110 struct hpack_dht *ddht; /* demux dynamic header table */
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200111 struct buffer dbuf; /* demux buffer */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200112
113 int32_t dsi; /* demux stream ID (<0 = idle) */
114 int32_t dfl; /* demux frame length (if dsi >= 0) */
115 int8_t dft; /* demux frame type (if dsi >= 0) */
116 int8_t dff; /* demux frame flags (if dsi >= 0) */
Willy Tarreau05e5daf2017-12-11 15:17:36 +0100117 uint8_t dpl; /* demux pad length (part of dfl), init to 0 */
118 /* 8 bit hole here */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200119 int32_t last_sid; /* last processed stream ID for GOAWAY, <0 before preface */
120
121 /* states for the mux direction */
Willy Tarreau51330962019-05-26 09:38:07 +0200122 struct buffer mbuf[H2C_MBUF_CNT]; /* mux buffers (ring) */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200123 int32_t msi; /* mux stream ID (<0 = idle) */
124 int32_t mfl; /* mux frame length (if dsi >= 0) */
125 int8_t mft; /* mux frame type (if dsi >= 0) */
126 int8_t mff; /* mux frame flags (if dsi >= 0) */
127 /* 16 bit hole here */
128 int32_t miw; /* mux initial window size for all new streams */
129 int32_t mws; /* mux window size. Can be negative. */
130 int32_t mfs; /* mux's max frame size */
131
Willy Tarreauea392822017-10-31 10:02:25 +0100132 int timeout; /* idle timeout duration in ticks */
Willy Tarreau599391a2017-11-24 10:16:00 +0100133 int shut_timeout; /* idle timeout duration in ticks after GOAWAY was sent */
Willy Tarreau49745612017-12-03 18:56:02 +0100134 unsigned int nb_streams; /* number of streams in the tree */
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200135 unsigned int nb_cs; /* number of attached conn_streams */
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100136 unsigned int nb_reserved; /* number of reserved streams */
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100137 unsigned int stream_cnt; /* total number of streams seen */
Willy Tarreau0b37d652018-10-03 10:33:02 +0200138 struct proxy *proxy; /* the proxy this connection was created for */
Willy Tarreauea392822017-10-31 10:02:25 +0100139 struct task *task; /* timeout management task */
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100140 struct h2_counters *px_counters; /* h2 counters attached to proxy */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200141 struct eb_root streams_by_id; /* all active streams by their ID */
142 struct list send_list; /* list of blocked streams requesting to send */
143 struct list fctl_list; /* list of streams blocked by connection's fctl */
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200144 struct list blocked_list; /* list of streams blocked for other reasons (e.g. sfctl, dep) */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100145 struct buffer_wait buf_wait; /* wait list for buffer allocations */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200146 struct wait_event wait_event; /* To be used if we're waiting for I/Os */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200147};
148
Willy Tarreau18312642017-10-11 07:57:07 +0200149/* H2 stream state, in h2s->st */
150enum h2_ss {
151 H2_SS_IDLE = 0, // idle
152 H2_SS_RLOC, // reserved(local)
153 H2_SS_RREM, // reserved(remote)
154 H2_SS_OPEN, // open
155 H2_SS_HREM, // half-closed(remote)
156 H2_SS_HLOC, // half-closed(local)
Willy Tarreau96060ba2017-10-16 18:34:34 +0200157 H2_SS_ERROR, // an error needs to be sent using RST_STREAM
Willy Tarreau18312642017-10-11 07:57:07 +0200158 H2_SS_CLOSED, // closed
159 H2_SS_ENTRIES // must be last
160} __attribute__((packed));
161
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200162#define H2_SS_MASK(state) (1UL << (state))
163#define H2_SS_IDLE_BIT (1UL << H2_SS_IDLE)
164#define H2_SS_RLOC_BIT (1UL << H2_SS_RLOC)
165#define H2_SS_RREM_BIT (1UL << H2_SS_RREM)
166#define H2_SS_OPEN_BIT (1UL << H2_SS_OPEN)
167#define H2_SS_HREM_BIT (1UL << H2_SS_HREM)
168#define H2_SS_HLOC_BIT (1UL << H2_SS_HLOC)
169#define H2_SS_ERROR_BIT (1UL << H2_SS_ERROR)
170#define H2_SS_CLOSED_BIT (1UL << H2_SS_CLOSED)
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200171
Willy Tarreau18312642017-10-11 07:57:07 +0200172/* HTTP/2 stream flags (32 bit), in h2s->flags */
173#define H2_SF_NONE 0x00000000
174#define H2_SF_ES_RCVD 0x00000001
175#define H2_SF_ES_SENT 0x00000002
176
177#define H2_SF_RST_RCVD 0x00000004 // received RST_STREAM
178#define H2_SF_RST_SENT 0x00000008 // sent RST_STREAM
179
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200180/* stream flags indicating the reason the stream is blocked */
181#define H2_SF_BLK_MBUSY 0x00000010 // blocked waiting for mux access (transient)
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200182#define H2_SF_BLK_MROOM 0x00000020 // blocked waiting for room in the mux (must be in send list)
183#define H2_SF_BLK_MFCTL 0x00000040 // blocked due to mux fctl (must be in fctl list)
184#define H2_SF_BLK_SFCTL 0x00000080 // blocked due to stream fctl (must be in blocked list)
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200185#define H2_SF_BLK_ANY 0x000000F0 // any of the reasons above
186
Willy Tarreau454f9052017-10-26 19:40:35 +0200187/* stream flags indicating how data is supposed to be sent */
188#define H2_SF_DATA_CLEN 0x00000100 // data sent using content-length
Christopher Faulet7d247f02020-12-02 14:26:36 +0100189#define H2_SF_BODYLESS_RESP 0x00000200 /* Bodyless response message */
Christopher Fauletd0db4232021-01-22 11:46:30 +0100190#define H2_SF_BODY_TUNNEL 0x00000400 // Attempt to establish a Tunnelled stream (the result depends on the status code)
191
Willy Tarreau454f9052017-10-26 19:40:35 +0200192
Willy Tarreaud9464162020-01-10 18:25:07 +0100193#define H2_SF_NOTIFIED 0x00000800 // a paused stream was notified to try to send again
Willy Tarreau67434202017-11-06 20:20:51 +0100194#define H2_SF_HEADERS_SENT 0x00001000 // a HEADERS frame was sent for this stream
Willy Tarreauc4312d32017-11-07 12:01:53 +0100195#define H2_SF_OUTGOING_DATA 0x00002000 // set whenever we've seen outgoing data
Willy Tarreau67434202017-11-06 20:20:51 +0100196
Willy Tarreau6cc85a52019-01-02 15:49:20 +0100197#define H2_SF_HEADERS_RCVD 0x00004000 // a HEADERS frame was received for this stream
198
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200199#define H2_SF_WANT_SHUTR 0x00008000 // a stream couldn't shutr() (mux full/busy)
200#define H2_SF_WANT_SHUTW 0x00010000 // a stream couldn't shutw() (mux full/busy)
Willy Tarreau3cf69fe2019-05-14 10:44:40 +0200201#define H2_SF_KILL_CONN 0x00020000 // kill the whole connection with this stream
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200202
Amaury Denoyelle5fb48ea2020-12-11 17:53:04 +0100203#define H2_SF_EXT_CONNECT_SENT 0x00040000 // rfc 8441 an Extended CONNECT has been sent
Amaury Denoyelleefe22762020-12-11 17:53:08 +0100204#define H2_SF_EXT_CONNECT_RCVD 0x00080000 // rfc 8441 an Extended CONNECT has been received and parsed
Christopher Fauletd0db4232021-01-22 11:46:30 +0100205
Amaury Denoyelle5fb48ea2020-12-11 17:53:04 +0100206#define H2_SF_TUNNEL_ABRT 0x00100000 // A tunnel attempt was aborted
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200207
Willy Tarreau18312642017-10-11 07:57:07 +0200208/* H2 stream descriptor, describing the stream as it appears in the H2C, and as
Christopher Fauletfafd1b02020-11-03 18:25:52 +0100209 * it is being processed in the internal HTTP representation (HTX).
Willy Tarreau18312642017-10-11 07:57:07 +0200210 */
211struct h2s {
212 struct conn_stream *cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +0100213 struct session *sess;
Willy Tarreau18312642017-10-11 07:57:07 +0200214 struct h2c *h2c;
Willy Tarreau18312642017-10-11 07:57:07 +0200215 struct eb32_node by_id; /* place in h2c's streams_by_id */
Willy Tarreau18312642017-10-11 07:57:07 +0200216 int32_t id; /* stream ID */
217 uint32_t flags; /* H2_SF_* */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +0200218 int sws; /* stream window size, to be added to the mux's initial window size */
Willy Tarreau18312642017-10-11 07:57:07 +0200219 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
220 enum h2_ss st;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +0200221 uint16_t status; /* HTTP response status */
Willy Tarreau1915ca22019-01-24 11:49:37 +0100222 unsigned long long body_len; /* remaining body length according to content-length if H2_SF_DATA_CLEN */
Olivier Houchard638b7992018-08-16 15:41:52 +0200223 struct buffer rxbuf; /* receive buffer, always valid (buf_empty or real buffer) */
Willy Tarreauf96508a2020-01-10 11:12:48 +0100224 struct wait_event *subs; /* recv wait_event the conn_stream associated is waiting on (via h2_subscribe) */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200225 struct list list; /* To be used when adding in h2c->send_list or h2c->fctl_lsit */
Willy Tarreau5723f292020-01-10 15:16:57 +0100226 struct tasklet *shut_tl; /* deferred shutdown tasklet, to retry to send an RST after we failed to,
227 * in case there's no other subscription to do it */
Amaury Denoyelle74162742020-12-11 17:53:05 +0100228
229 char upgrade_protocol[16]; /* rfc 8441: requested protocol on Extended CONNECT */
Willy Tarreau18312642017-10-11 07:57:07 +0200230};
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200231
Willy Tarreauc6405142017-09-21 20:23:50 +0200232/* descriptor for an h2 frame header */
233struct h2_fh {
234 uint32_t len; /* length, host order, 24 bits */
235 uint32_t sid; /* stream id, host order, 31 bits */
236 uint8_t ft; /* frame type */
237 uint8_t ff; /* frame flags */
238};
239
Willy Tarreau12ae2122019-08-08 18:23:12 +0200240/* trace source and events */
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200241static void h2_trace(enum trace_level level, uint64_t mask, \
242 const struct trace_source *src,
243 const struct ist where, const struct ist func,
244 const void *a1, const void *a2, const void *a3, const void *a4);
Willy Tarreau12ae2122019-08-08 18:23:12 +0200245
246/* The event representation is split like this :
247 * strm - application layer
248 * h2s - internal H2 stream
249 * h2c - internal H2 connection
250 * conn - external connection
251 *
252 */
253static const struct trace_event h2_trace_events[] = {
254#define H2_EV_H2C_NEW (1ULL << 0)
Willy Tarreau87951942019-08-30 07:34:36 +0200255 { .mask = H2_EV_H2C_NEW, .name = "h2c_new", .desc = "new H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200256#define H2_EV_H2C_RECV (1ULL << 1)
Willy Tarreau87951942019-08-30 07:34:36 +0200257 { .mask = H2_EV_H2C_RECV, .name = "h2c_recv", .desc = "Rx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200258#define H2_EV_H2C_SEND (1ULL << 2)
Willy Tarreau87951942019-08-30 07:34:36 +0200259 { .mask = H2_EV_H2C_SEND, .name = "h2c_send", .desc = "Tx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200260#define H2_EV_H2C_FCTL (1ULL << 3)
Willy Tarreau87951942019-08-30 07:34:36 +0200261 { .mask = H2_EV_H2C_FCTL, .name = "h2c_fctl", .desc = "H2 connection flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200262#define H2_EV_H2C_BLK (1ULL << 4)
Willy Tarreau87951942019-08-30 07:34:36 +0200263 { .mask = H2_EV_H2C_BLK, .name = "h2c_blk", .desc = "H2 connection blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200264#define H2_EV_H2C_WAKE (1ULL << 5)
Willy Tarreau87951942019-08-30 07:34:36 +0200265 { .mask = H2_EV_H2C_WAKE, .name = "h2c_wake", .desc = "H2 connection woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200266#define H2_EV_H2C_END (1ULL << 6)
Willy Tarreau87951942019-08-30 07:34:36 +0200267 { .mask = H2_EV_H2C_END, .name = "h2c_end", .desc = "H2 connection terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200268#define H2_EV_H2C_ERR (1ULL << 7)
Willy Tarreau87951942019-08-30 07:34:36 +0200269 { .mask = H2_EV_H2C_ERR, .name = "h2c_err", .desc = "error on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200270#define H2_EV_RX_FHDR (1ULL << 8)
Willy Tarreau87951942019-08-30 07:34:36 +0200271 { .mask = H2_EV_RX_FHDR, .name = "rx_fhdr", .desc = "H2 frame header received" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200272#define H2_EV_RX_FRAME (1ULL << 9)
Willy Tarreau87951942019-08-30 07:34:36 +0200273 { .mask = H2_EV_RX_FRAME, .name = "rx_frame", .desc = "receipt of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200274#define H2_EV_RX_EOI (1ULL << 10)
Willy Tarreau87951942019-08-30 07:34:36 +0200275 { .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 +0200276#define H2_EV_RX_PREFACE (1ULL << 11)
Willy Tarreau87951942019-08-30 07:34:36 +0200277 { .mask = H2_EV_RX_PREFACE, .name = "rx_preface", .desc = "receipt of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200278#define H2_EV_RX_DATA (1ULL << 12)
Willy Tarreau87951942019-08-30 07:34:36 +0200279 { .mask = H2_EV_RX_DATA, .name = "rx_data", .desc = "receipt of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200280#define H2_EV_RX_HDR (1ULL << 13)
Willy Tarreau87951942019-08-30 07:34:36 +0200281 { .mask = H2_EV_RX_HDR, .name = "rx_hdr", .desc = "receipt of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200282#define H2_EV_RX_PRIO (1ULL << 14)
Willy Tarreau87951942019-08-30 07:34:36 +0200283 { .mask = H2_EV_RX_PRIO, .name = "rx_prio", .desc = "receipt of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200284#define H2_EV_RX_RST (1ULL << 15)
Willy Tarreau87951942019-08-30 07:34:36 +0200285 { .mask = H2_EV_RX_RST, .name = "rx_rst", .desc = "receipt of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200286#define H2_EV_RX_SETTINGS (1ULL << 16)
Willy Tarreau87951942019-08-30 07:34:36 +0200287 { .mask = H2_EV_RX_SETTINGS, .name = "rx_settings", .desc = "receipt of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200288#define H2_EV_RX_PUSH (1ULL << 17)
Willy Tarreau87951942019-08-30 07:34:36 +0200289 { .mask = H2_EV_RX_PUSH, .name = "rx_push", .desc = "receipt of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200290#define H2_EV_RX_PING (1ULL << 18)
Willy Tarreau87951942019-08-30 07:34:36 +0200291 { .mask = H2_EV_RX_PING, .name = "rx_ping", .desc = "receipt of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200292#define H2_EV_RX_GOAWAY (1ULL << 19)
Willy Tarreau87951942019-08-30 07:34:36 +0200293 { .mask = H2_EV_RX_GOAWAY, .name = "rx_goaway", .desc = "receipt of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200294#define H2_EV_RX_WU (1ULL << 20)
Willy Tarreau87951942019-08-30 07:34:36 +0200295 { .mask = H2_EV_RX_WU, .name = "rx_wu", .desc = "receipt of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200296#define H2_EV_RX_CONT (1ULL << 21)
Willy Tarreau87951942019-08-30 07:34:36 +0200297 { .mask = H2_EV_RX_CONT, .name = "rx_cont", .desc = "receipt of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200298#define H2_EV_TX_FRAME (1ULL << 22)
Willy Tarreau87951942019-08-30 07:34:36 +0200299 { .mask = H2_EV_TX_FRAME, .name = "tx_frame", .desc = "transmission of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200300#define H2_EV_TX_EOI (1ULL << 23)
Willy Tarreau87951942019-08-30 07:34:36 +0200301 { .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 +0200302#define H2_EV_TX_PREFACE (1ULL << 24)
Willy Tarreau87951942019-08-30 07:34:36 +0200303 { .mask = H2_EV_TX_PREFACE, .name = "tx_preface", .desc = "transmission of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200304#define H2_EV_TX_DATA (1ULL << 25)
Willy Tarreau87951942019-08-30 07:34:36 +0200305 { .mask = H2_EV_TX_DATA, .name = "tx_data", .desc = "transmission of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200306#define H2_EV_TX_HDR (1ULL << 26)
Willy Tarreau87951942019-08-30 07:34:36 +0200307 { .mask = H2_EV_TX_HDR, .name = "tx_hdr", .desc = "transmission of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200308#define H2_EV_TX_PRIO (1ULL << 27)
Willy Tarreau87951942019-08-30 07:34:36 +0200309 { .mask = H2_EV_TX_PRIO, .name = "tx_prio", .desc = "transmission of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200310#define H2_EV_TX_RST (1ULL << 28)
Willy Tarreau87951942019-08-30 07:34:36 +0200311 { .mask = H2_EV_TX_RST, .name = "tx_rst", .desc = "transmission of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200312#define H2_EV_TX_SETTINGS (1ULL << 29)
Willy Tarreau87951942019-08-30 07:34:36 +0200313 { .mask = H2_EV_TX_SETTINGS, .name = "tx_settings", .desc = "transmission of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200314#define H2_EV_TX_PUSH (1ULL << 30)
Willy Tarreau87951942019-08-30 07:34:36 +0200315 { .mask = H2_EV_TX_PUSH, .name = "tx_push", .desc = "transmission of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200316#define H2_EV_TX_PING (1ULL << 31)
Willy Tarreau87951942019-08-30 07:34:36 +0200317 { .mask = H2_EV_TX_PING, .name = "tx_ping", .desc = "transmission of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200318#define H2_EV_TX_GOAWAY (1ULL << 32)
Willy Tarreau87951942019-08-30 07:34:36 +0200319 { .mask = H2_EV_TX_GOAWAY, .name = "tx_goaway", .desc = "transmission of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200320#define H2_EV_TX_WU (1ULL << 33)
Willy Tarreau87951942019-08-30 07:34:36 +0200321 { .mask = H2_EV_TX_WU, .name = "tx_wu", .desc = "transmission of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200322#define H2_EV_TX_CONT (1ULL << 34)
Willy Tarreau87951942019-08-30 07:34:36 +0200323 { .mask = H2_EV_TX_CONT, .name = "tx_cont", .desc = "transmission of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200324#define H2_EV_H2S_NEW (1ULL << 35)
Willy Tarreau87951942019-08-30 07:34:36 +0200325 { .mask = H2_EV_H2S_NEW, .name = "h2s_new", .desc = "new H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200326#define H2_EV_H2S_RECV (1ULL << 36)
Willy Tarreau87951942019-08-30 07:34:36 +0200327 { .mask = H2_EV_H2S_RECV, .name = "h2s_recv", .desc = "Rx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200328#define H2_EV_H2S_SEND (1ULL << 37)
Willy Tarreau87951942019-08-30 07:34:36 +0200329 { .mask = H2_EV_H2S_SEND, .name = "h2s_send", .desc = "Tx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200330#define H2_EV_H2S_FCTL (1ULL << 38)
Willy Tarreau87951942019-08-30 07:34:36 +0200331 { .mask = H2_EV_H2S_FCTL, .name = "h2s_fctl", .desc = "H2 stream flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200332#define H2_EV_H2S_BLK (1ULL << 39)
Willy Tarreau87951942019-08-30 07:34:36 +0200333 { .mask = H2_EV_H2S_BLK, .name = "h2s_blk", .desc = "H2 stream blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200334#define H2_EV_H2S_WAKE (1ULL << 40)
Willy Tarreau87951942019-08-30 07:34:36 +0200335 { .mask = H2_EV_H2S_WAKE, .name = "h2s_wake", .desc = "H2 stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200336#define H2_EV_H2S_END (1ULL << 41)
Willy Tarreau87951942019-08-30 07:34:36 +0200337 { .mask = H2_EV_H2S_END, .name = "h2s_end", .desc = "H2 stream terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200338#define H2_EV_H2S_ERR (1ULL << 42)
Willy Tarreau87951942019-08-30 07:34:36 +0200339 { .mask = H2_EV_H2S_ERR, .name = "h2s_err", .desc = "error on H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200340#define H2_EV_STRM_NEW (1ULL << 43)
Willy Tarreau87951942019-08-30 07:34:36 +0200341 { .mask = H2_EV_STRM_NEW, .name = "strm_new", .desc = "app-layer stream creation" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200342#define H2_EV_STRM_RECV (1ULL << 44)
Willy Tarreau87951942019-08-30 07:34:36 +0200343 { .mask = H2_EV_STRM_RECV, .name = "strm_recv", .desc = "receiving data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200344#define H2_EV_STRM_SEND (1ULL << 45)
Willy Tarreau87951942019-08-30 07:34:36 +0200345 { .mask = H2_EV_STRM_SEND, .name = "strm_send", .desc = "sending data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200346#define H2_EV_STRM_FULL (1ULL << 46)
Willy Tarreau87951942019-08-30 07:34:36 +0200347 { .mask = H2_EV_STRM_FULL, .name = "strm_full", .desc = "stream buffer full" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200348#define H2_EV_STRM_WAKE (1ULL << 47)
Willy Tarreau87951942019-08-30 07:34:36 +0200349 { .mask = H2_EV_STRM_WAKE, .name = "strm_wake", .desc = "stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200350#define H2_EV_STRM_SHUT (1ULL << 48)
Willy Tarreau87951942019-08-30 07:34:36 +0200351 { .mask = H2_EV_STRM_SHUT, .name = "strm_shut", .desc = "stream shutdown" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200352#define H2_EV_STRM_END (1ULL << 49)
Willy Tarreau87951942019-08-30 07:34:36 +0200353 { .mask = H2_EV_STRM_END, .name = "strm_end", .desc = "detaching app-layer stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200354#define H2_EV_STRM_ERR (1ULL << 50)
Willy Tarreau87951942019-08-30 07:34:36 +0200355 { .mask = H2_EV_STRM_ERR, .name = "strm_err", .desc = "stream error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200356#define H2_EV_PROTO_ERR (1ULL << 51)
Willy Tarreau87951942019-08-30 07:34:36 +0200357 { .mask = H2_EV_PROTO_ERR, .name = "proto_err", .desc = "protocol error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200358 { }
359};
360
361static const struct name_desc h2_trace_lockon_args[4] = {
362 /* arg1 */ { /* already used by the connection */ },
363 /* arg2 */ { .name="h2s", .desc="H2 stream" },
364 /* arg3 */ { },
365 /* arg4 */ { }
366};
367
368static const struct name_desc h2_trace_decoding[] = {
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200369#define H2_VERB_CLEAN 1
370 { .name="clean", .desc="only user-friendly stuff, generally suitable for level \"user\"" },
371#define H2_VERB_MINIMAL 2
Willy Tarreau12ae2122019-08-08 18:23:12 +0200372 { .name="minimal", .desc="report only h2c/h2s state and flags, no real decoding" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200373#define H2_VERB_SIMPLE 3
Willy Tarreau12ae2122019-08-08 18:23:12 +0200374 { .name="simple", .desc="add request/response status line or frame info when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200375#define H2_VERB_ADVANCED 4
Willy Tarreau12ae2122019-08-08 18:23:12 +0200376 { .name="advanced", .desc="add header fields or frame decoding when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200377#define H2_VERB_COMPLETE 5
Willy Tarreau12ae2122019-08-08 18:23:12 +0200378 { .name="complete", .desc="add full data dump when available" },
379 { /* end */ }
380};
381
Willy Tarreau6eb3d372021-04-10 19:29:26 +0200382static struct trace_source trace_h2 __read_mostly = {
Willy Tarreau12ae2122019-08-08 18:23:12 +0200383 .name = IST("h2"),
384 .desc = "HTTP/2 multiplexer",
385 .arg_def = TRC_ARG1_CONN, // TRACE()'s first argument is always a connection
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200386 .default_cb = h2_trace,
Willy Tarreau12ae2122019-08-08 18:23:12 +0200387 .known_events = h2_trace_events,
388 .lockon_args = h2_trace_lockon_args,
389 .decoding = h2_trace_decoding,
390 .report_events = ~0, // report everything by default
391};
392
393#define TRACE_SOURCE &trace_h2
394INITCALL1(STG_REGISTER, trace_register_source, TRACE_SOURCE);
395
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100396/* h2 stats module */
397enum {
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100398 H2_ST_HEADERS_RCVD,
399 H2_ST_DATA_RCVD,
400 H2_ST_SETTINGS_RCVD,
401 H2_ST_RST_STREAM_RCVD,
402 H2_ST_GOAWAY_RCVD,
403
Amaury Denoyellea8879232020-10-27 17:16:03 +0100404 H2_ST_CONN_PROTO_ERR,
405 H2_ST_STRM_PROTO_ERR,
406 H2_ST_RST_STREAM_RESP,
407 H2_ST_GOAWAY_RESP,
408
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100409 H2_ST_OPEN_CONN,
410 H2_ST_OPEN_STREAM,
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100411 H2_ST_TOTAL_CONN,
412 H2_ST_TOTAL_STREAM,
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100413
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100414 H2_STATS_COUNT /* must be the last member of the enum */
415};
416
417static struct name_desc h2_stats[] = {
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100418 [H2_ST_HEADERS_RCVD] = { .name = "h2_headers_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100419 .desc = "Total number of received HEADERS frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100420 [H2_ST_DATA_RCVD] = { .name = "h2_data_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100421 .desc = "Total number of received DATA frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100422 [H2_ST_SETTINGS_RCVD] = { .name = "h2_settings_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100423 .desc = "Total number of received SETTINGS frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100424 [H2_ST_RST_STREAM_RCVD] = { .name = "h2_rst_stream_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100425 .desc = "Total number of received RST_STREAM frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100426 [H2_ST_GOAWAY_RCVD] = { .name = "h2_goaway_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100427 .desc = "Total number of received GOAWAY frames" },
Amaury Denoyellea8879232020-10-27 17:16:03 +0100428
429 [H2_ST_CONN_PROTO_ERR] = { .name = "h2_detected_conn_protocol_errors",
430 .desc = "Total number of connection protocol errors" },
431 [H2_ST_STRM_PROTO_ERR] = { .name = "h2_detected_strm_protocol_errors",
432 .desc = "Total number of stream protocol errors" },
433 [H2_ST_RST_STREAM_RESP] = { .name = "h2_rst_stream_resp",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100434 .desc = "Total number of RST_STREAM sent on detected error" },
Amaury Denoyellea8879232020-10-27 17:16:03 +0100435 [H2_ST_GOAWAY_RESP] = { .name = "h2_goaway_resp",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100436 .desc = "Total number of GOAWAY sent on detected error" },
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100437
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100438 [H2_ST_OPEN_CONN] = { .name = "h2_open_connections",
439 .desc = "Count of currently open connections" },
440 [H2_ST_OPEN_STREAM] = { .name = "h2_backend_open_streams",
441 .desc = "Count of currently open streams" },
Amaury Denoyelle377d8782021-02-03 16:27:22 +0100442 [H2_ST_TOTAL_CONN] = { .name = "h2_total_connections",
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100443 .desc = "Total number of connections" },
Amaury Denoyelle377d8782021-02-03 16:27:22 +0100444 [H2_ST_TOTAL_STREAM] = { .name = "h2_backend_total_streams",
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100445 .desc = "Total number of streams" },
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100446};
447
448static struct h2_counters {
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100449 long long headers_rcvd; /* total number of HEADERS frame received */
450 long long data_rcvd; /* total number of DATA frame received */
451 long long settings_rcvd; /* total number of SETTINGS frame received */
452 long long rst_stream_rcvd; /* total number of RST_STREAM frame received */
453 long long goaway_rcvd; /* total number of GOAWAY frame received */
Amaury Denoyellea8879232020-10-27 17:16:03 +0100454
455 long long conn_proto_err; /* total number of protocol errors detected */
456 long long strm_proto_err; /* total number of protocol errors detected */
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100457 long long rst_stream_resp; /* total number of RST_STREAM frame sent on error */
458 long long goaway_resp; /* total number of GOAWAY frame sent on error */
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100459
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100460 long long open_conns; /* count of currently open connections */
461 long long open_streams; /* count of currently open streams */
462 long long total_conns; /* total number of connections */
463 long long total_streams; /* total number of streams */
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100464} h2_counters;
465
466static void h2_fill_stats(void *data, struct field *stats)
467{
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100468 struct h2_counters *counters = data;
469
470 stats[H2_ST_HEADERS_RCVD] = mkf_u64(FN_COUNTER, counters->headers_rcvd);
471 stats[H2_ST_DATA_RCVD] = mkf_u64(FN_COUNTER, counters->data_rcvd);
472 stats[H2_ST_SETTINGS_RCVD] = mkf_u64(FN_COUNTER, counters->settings_rcvd);
473 stats[H2_ST_RST_STREAM_RCVD] = mkf_u64(FN_COUNTER, counters->rst_stream_rcvd);
474 stats[H2_ST_GOAWAY_RCVD] = mkf_u64(FN_COUNTER, counters->goaway_rcvd);
Amaury Denoyellea8879232020-10-27 17:16:03 +0100475
476 stats[H2_ST_CONN_PROTO_ERR] = mkf_u64(FN_COUNTER, counters->conn_proto_err);
477 stats[H2_ST_STRM_PROTO_ERR] = mkf_u64(FN_COUNTER, counters->strm_proto_err);
478 stats[H2_ST_RST_STREAM_RESP] = mkf_u64(FN_COUNTER, counters->rst_stream_resp);
479 stats[H2_ST_GOAWAY_RESP] = mkf_u64(FN_COUNTER, counters->goaway_resp);
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100480
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100481 stats[H2_ST_OPEN_CONN] = mkf_u64(FN_GAUGE, counters->open_conns);
482 stats[H2_ST_OPEN_STREAM] = mkf_u64(FN_GAUGE, counters->open_streams);
483 stats[H2_ST_TOTAL_CONN] = mkf_u64(FN_COUNTER, counters->total_conns);
484 stats[H2_ST_TOTAL_STREAM] = mkf_u64(FN_COUNTER, counters->total_streams);
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100485}
486
487static struct stats_module h2_stats_module = {
488 .name = "h2",
489 .fill_stats = h2_fill_stats,
490 .stats = h2_stats,
491 .stats_count = H2_STATS_COUNT,
492 .counters = &h2_counters,
493 .counters_size = sizeof(h2_counters),
494 .domain_flags = MK_STATS_PROXY_DOMAIN(STATS_PX_CAP_FE|STATS_PX_CAP_BE),
495 .clearable = 1,
496};
497
498INITCALL1(STG_REGISTER, stats_register_module, &h2_stats_module);
499
Willy Tarreau8ceae722018-11-26 11:58:30 +0100500/* the h2c connection pool */
501DECLARE_STATIC_POOL(pool_head_h2c, "h2c", sizeof(struct h2c));
502
503/* the h2s stream pool */
504DECLARE_STATIC_POOL(pool_head_h2s, "h2s", sizeof(struct h2s));
505
Willy Tarreaudc572362018-12-12 08:08:05 +0100506/* The default connection window size is 65535, it may only be enlarged using
507 * a WINDOW_UPDATE message. Since the window must never be larger than 2G-1,
508 * we'll pretend we already received the difference between the two to send
509 * an equivalent window update to enlarge it to 2G-1.
510 */
511#define H2_INITIAL_WINDOW_INCREMENT ((1U<<31)-1 - 65535)
512
Willy Tarreau455d5682019-05-24 19:42:18 +0200513/* maximum amount of data we're OK with re-aligning for buffer optimizations */
514#define MAX_DATA_REALIGN 1024
515
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200516/* a few settings from the global section */
517static int h2_settings_header_table_size = 4096; /* initial value */
Willy Tarreaue6baec02017-07-27 11:45:11 +0200518static int h2_settings_initial_window_size = 65535; /* initial value */
Willy Tarreau5a490b62019-01-31 10:39:51 +0100519static unsigned int h2_settings_max_concurrent_streams = 100;
Willy Tarreaua24b35c2019-02-21 13:24:36 +0100520static int h2_settings_max_frame_size = 0; /* unset */
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200521
Willy Tarreau2a856182017-05-16 15:20:39 +0200522/* a dmumy closed stream */
523static const struct h2s *h2_closed_stream = &(const struct h2s){
524 .cs = NULL,
525 .h2c = NULL,
526 .st = H2_SS_CLOSED,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100527 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreauab837502017-12-27 15:07:30 +0100528 .flags = H2_SF_RST_RCVD,
Willy Tarreau2a856182017-05-16 15:20:39 +0200529 .id = 0,
530};
531
Willy Tarreauecb9dcd2019-01-03 12:00:17 +0100532/* a dmumy closed stream returning a PROTOCOL_ERROR error */
533static const struct h2s *h2_error_stream = &(const struct h2s){
534 .cs = NULL,
535 .h2c = NULL,
536 .st = H2_SS_CLOSED,
537 .errcode = H2_ERR_PROTOCOL_ERROR,
538 .flags = 0,
539 .id = 0,
540};
541
Willy Tarreau8d0d58b2018-12-23 18:29:12 +0100542/* a dmumy closed stream returning a REFUSED_STREAM error */
543static const struct h2s *h2_refused_stream = &(const struct h2s){
544 .cs = NULL,
545 .h2c = NULL,
546 .st = H2_SS_CLOSED,
547 .errcode = H2_ERR_REFUSED_STREAM,
548 .flags = 0,
549 .id = 0,
550};
551
Willy Tarreau2a856182017-05-16 15:20:39 +0200552/* and a dummy idle stream for use with any unannounced stream */
553static const struct h2s *h2_idle_stream = &(const struct h2s){
554 .cs = NULL,
555 .h2c = NULL,
556 .st = H2_SS_IDLE,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100557 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreau2a856182017-05-16 15:20:39 +0200558 .id = 0,
559};
560
Willy Tarreau144f84a2021-03-02 16:09:26 +0100561struct task *h2_timeout_task(struct task *t, void *context, unsigned int state);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +0200562static int h2_send(struct h2c *h2c);
563static int h2_recv(struct h2c *h2c);
Olivier Houchard7505f942018-08-21 18:10:44 +0200564static int h2_process(struct h2c *h2c);
Willy Tarreau691d5032021-01-20 14:55:01 +0100565/* h2_io_cb is exported to see it resolved in "show fd" */
Willy Tarreau144f84a2021-03-02 16:09:26 +0100566struct task *h2_io_cb(struct task *t, void *ctx, unsigned int state);
Willy Tarreau0b559072018-02-26 15:22:17 +0100567static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id);
Amaury Denoyelle74162742020-12-11 17:53:05 +0100568static int h2c_decode_headers(struct h2c *h2c, struct buffer *rxbuf, uint32_t *flags, unsigned long long *body_len, char *upgrade_protocol);
Willy Tarreaua56a6de2018-02-26 15:59:07 +0100569static int h2_frt_transfer_data(struct h2s *h2s);
Willy Tarreau144f84a2021-03-02 16:09:26 +0100570struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned int state);
Olivier Houchardf502aca2018-12-14 19:42:40 +0100571static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess);
Willy Tarreau8b2757c2018-12-19 17:36:48 +0100572static void h2s_alert(struct h2s *h2s);
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200573
Willy Tarreauab2ec452019-08-30 07:07:08 +0200574/* returns a h2c state as an abbreviated 3-letter string, or "???" if unknown */
575static inline const char *h2c_st_to_str(enum h2_cs st)
576{
577 switch (st) {
578 case H2_CS_PREFACE: return "PRF";
579 case H2_CS_SETTINGS1: return "STG";
580 case H2_CS_FRAME_H: return "FRH";
581 case H2_CS_FRAME_P: return "FRP";
582 case H2_CS_FRAME_A: return "FRA";
583 case H2_CS_FRAME_E: return "FRE";
584 case H2_CS_ERROR: return "ERR";
585 case H2_CS_ERROR2: return "ER2";
586 default: return "???";
587 }
588}
589
590/* returns a h2s state as an abbreviated 3-letter string, or "???" if unknown */
591static inline const char *h2s_st_to_str(enum h2_ss st)
592{
593 switch (st) {
594 case H2_SS_IDLE: return "IDL"; // idle
595 case H2_SS_RLOC: return "RSL"; // reserved local
596 case H2_SS_RREM: return "RSR"; // reserved remote
597 case H2_SS_OPEN: return "OPN"; // open
598 case H2_SS_HREM: return "HCR"; // half-closed remote
599 case H2_SS_HLOC: return "HCL"; // half-closed local
600 case H2_SS_ERROR : return "ERR"; // error
601 case H2_SS_CLOSED: return "CLO"; // closed
602 default: return "???";
603 }
604}
605
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200606/* the H2 traces always expect that arg1, if non-null, is of type connection
607 * (from which we can derive h2c), that arg2, if non-null, is of type h2s, and
608 * that arg3, if non-null, is either of type htx for tx headers, or of type
609 * buffer for everything else.
610 */
611static void h2_trace(enum trace_level level, uint64_t mask, const struct trace_source *src,
612 const struct ist where, const struct ist func,
613 const void *a1, const void *a2, const void *a3, const void *a4)
614{
615 const struct connection *conn = a1;
616 const struct h2c *h2c = conn ? conn->ctx : NULL;
617 const struct h2s *h2s = a2;
618 const struct buffer *buf = a3;
619 const struct htx *htx;
620 int pos;
621
622 if (!h2c) // nothing to add
623 return;
624
Willy Tarreau17104d42019-08-30 07:12:55 +0200625 if (src->verbosity > H2_VERB_CLEAN) {
Willy Tarreau73db4342019-09-25 07:28:44 +0200626 chunk_appendf(&trace_buf, " : h2c=%p(%c,%s)", h2c, conn_is_back(conn) ? 'B' : 'F', h2c_st_to_str(h2c->st0));
627
Willy Tarreaue2f68e92021-06-16 17:47:24 +0200628 if (mask & H2_EV_H2C_NEW) // inside h2_init, otherwise it's hard to match conn & h2c
629 conn_append_debug_info(&trace_buf, conn, " : ");
630
Willy Tarreauf3ce0412019-11-24 14:57:00 +0100631 if (h2c->errcode)
632 chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2c->errcode), h2c->errcode);
633
Willy Tarreau73db4342019-09-25 07:28:44 +0200634 if (h2c->dsi >= 0 &&
635 (mask & (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) == (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) {
Willy Tarreau8520d872020-09-18 07:39:29 +0200636 chunk_appendf(&trace_buf, " dft=%s/%02x dfl=%d", h2_ft_str(h2c->dft), h2c->dff, h2c->dfl);
Willy Tarreau73db4342019-09-25 07:28:44 +0200637 }
638
639 if (h2s) {
640 if (h2s->id <= 0)
641 chunk_appendf(&trace_buf, " dsi=%d", h2c->dsi);
642 chunk_appendf(&trace_buf, " h2s=%p(%d,%s)", h2s, h2s->id, h2s_st_to_str(h2s->st));
Willy Tarreauf3ce0412019-11-24 14:57:00 +0100643 if (h2s->id && h2s->errcode)
644 chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2s->errcode), h2s->errcode);
Willy Tarreau73db4342019-09-25 07:28:44 +0200645 }
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200646 }
647
648 /* Let's dump decoded requests and responses right after parsing. They
649 * are traced at level USER with a few recognizable flags.
650 */
651 if ((mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW) ||
652 mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR)) && buf)
653 htx = htxbuf(buf); // recv req/res
654 else if (mask == (H2_EV_TX_FRAME|H2_EV_TX_HDR))
655 htx = a3; // send req/res
656 else
657 htx = NULL;
658
Willy Tarreau94f1dcf2019-08-30 07:11:30 +0200659 if (level == TRACE_LEVEL_USER && src->verbosity != H2_VERB_MINIMAL && htx && (pos = htx_get_head(htx)) != -1) {
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200660 const struct htx_blk *blk = htx_get_blk(htx, pos);
661 const struct htx_sl *sl = htx_get_blk_ptr(htx, blk);
662 enum htx_blk_type type = htx_get_blk_type(blk);
663
664 if (type == HTX_BLK_REQ_SL)
665 chunk_appendf(&trace_buf, " : [%d] H2 REQ: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200666 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200667 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
668 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
669 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
670 else if (type == HTX_BLK_RES_SL)
671 chunk_appendf(&trace_buf, " : [%d] H2 RES: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200672 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200673 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
674 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
675 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
676 }
677}
678
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200679
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100680/* Detect a pending read0 for a H2 connection. It happens if a read0 was
681 * already reported on a previous xprt->rcvbuf() AND a frame parser failed
682 * to parse pending data, confirming no more progress is possible because
683 * we're facing a truncated frame. The function returns 1 to report a read0
684 * or 0 otherwise.
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200685 */
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100686static inline int h2c_read0_pending(struct h2c *h2c)
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200687{
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100688 return !!(h2c->flags & H2_CF_END_REACHED);
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200689}
690
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200691/* returns true if the connection is allowed to expire, false otherwise. A
Willy Tarreaud34d25a2022-03-18 14:59:54 +0100692 * connection may expire when it has no attached streams. As long as streams
693 * are attached, the application layer is responsible for timeout management,
694 * and each layer will detach when it doesn't want to wait anymore. When the
695 * last one leaves, the connection must take over timeout management.
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200696 */
697static inline int h2c_may_expire(const struct h2c *h2c)
698{
Willy Tarreaud34d25a2022-03-18 14:59:54 +0100699 return !h2c->nb_cs;
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200700}
701
Olivier Houchard7a977432019-03-21 15:47:13 +0100702static __inline int
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200703h2c_is_dead(const struct h2c *h2c)
Olivier Houchard7a977432019-03-21 15:47:13 +0100704{
705 if (eb_is_empty(&h2c->streams_by_id) && /* don't close if streams exist */
706 ((h2c->conn->flags & CO_FL_ERROR) || /* errors close immediately */
707 (h2c->st0 >= H2_CS_ERROR && !h2c->task) || /* a timeout stroke earlier */
708 (!(h2c->conn->owner)) || /* Nobody's left to take care of the connection, drop it now */
Willy Tarreau662fafc2019-05-26 09:43:07 +0200709 (!br_data(h2c->mbuf) && /* mux buffer empty, also process clean events below */
Olivier Houchard7a977432019-03-21 15:47:13 +0100710 (conn_xprt_read0_pending(h2c->conn) ||
711 (h2c->last_sid >= 0 && h2c->max_id >= h2c->last_sid)))))
712 return 1;
713
714 return 0;
Olivier Houchard7a977432019-03-21 15:47:13 +0100715}
716
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200717/*****************************************************/
718/* functions below are for dynamic buffer management */
719/*****************************************************/
720
Willy Tarreau315d8072017-12-10 22:17:57 +0100721/* indicates whether or not the we may call the h2_recv() function to attempt
722 * to receive data into the buffer and/or demux pending data. The condition is
723 * a bit complex due to some API limits for now. The rules are the following :
724 * - if an error or a shutdown was detected on the connection and the buffer
725 * is empty, we must not attempt to receive
726 * - if the demux buf failed to be allocated, we must not try to receive and
727 * we know there is nothing pending
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100728 * - if no flag indicates a blocking condition, we may attempt to receive,
729 * regardless of whether the demux buffer is full or not, so that only
730 * de demux part decides whether or not to block. This is needed because
731 * the connection API indeed prevents us from re-enabling receipt that is
732 * already enabled in a polled state, so we must always immediately stop
733 * as soon as the demux can't proceed so as never to hit an end of read
734 * with data pending in the buffers.
Willy Tarreau315d8072017-12-10 22:17:57 +0100735 * - otherwise must may not attempt
736 */
737static inline int h2_recv_allowed(const struct h2c *h2c)
738{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200739 if (b_data(&h2c->dbuf) == 0 &&
Willy Tarreau315d8072017-12-10 22:17:57 +0100740 (h2c->st0 >= H2_CS_ERROR ||
741 h2c->conn->flags & CO_FL_ERROR ||
742 conn_xprt_read0_pending(h2c->conn)))
743 return 0;
744
745 if (!(h2c->flags & H2_CF_DEM_DALLOC) &&
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100746 !(h2c->flags & H2_CF_DEM_BLOCK_ANY))
Willy Tarreau315d8072017-12-10 22:17:57 +0100747 return 1;
748
749 return 0;
750}
751
Willy Tarreau47b515a2018-12-21 16:09:41 +0100752/* restarts reading on the connection if it was not enabled */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200753static inline void h2c_restart_reading(const struct h2c *h2c, int consider_buffer)
Willy Tarreau47b515a2018-12-21 16:09:41 +0100754{
755 if (!h2_recv_allowed(h2c))
756 return;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200757 if ((!consider_buffer || !b_data(&h2c->dbuf))
758 && (h2c->wait_event.events & SUB_RETRY_RECV))
Willy Tarreau47b515a2018-12-21 16:09:41 +0100759 return;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200760 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau47b515a2018-12-21 16:09:41 +0100761}
762
763
Willy Tarreaufa1d3572019-01-31 10:31:51 +0100764/* returns true if the front connection has too many conn_streams attached */
765static inline int h2_frt_has_too_many_cs(const struct h2c *h2c)
Willy Tarreauf2101912018-07-19 10:11:38 +0200766{
Willy Tarreaua8754662018-12-23 20:43:58 +0100767 return h2c->nb_cs > h2_settings_max_concurrent_streams;
Willy Tarreauf2101912018-07-19 10:11:38 +0200768}
769
Willy Tarreau44e973f2018-03-01 17:49:30 +0100770/* Tries to grab a buffer and to re-enable processing on mux <target>. The h2c
771 * flags are used to figure what buffer was requested. It returns 1 if the
772 * allocation succeeds, in which case the connection is woken up, or 0 if it's
773 * impossible to wake up and we prefer to be woken up later.
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200774 */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100775static int h2_buf_available(void *target)
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200776{
777 struct h2c *h2c = target;
Willy Tarreau0b559072018-02-26 15:22:17 +0100778 struct h2s *h2s;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200779
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100780 if ((h2c->flags & H2_CF_DEM_DALLOC) && b_alloc(&h2c->dbuf)) {
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200781 h2c->flags &= ~H2_CF_DEM_DALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200782 h2c_restart_reading(h2c, 1);
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200783 return 1;
784 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200785
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100786 if ((h2c->flags & H2_CF_MUX_MALLOC) && b_alloc(br_tail(h2c->mbuf))) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100787 h2c->flags &= ~H2_CF_MUX_MALLOC;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200788
789 if (h2c->flags & H2_CF_DEM_MROOM) {
790 h2c->flags &= ~H2_CF_DEM_MROOM;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200791 h2c_restart_reading(h2c, 1);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200792 }
Willy Tarreau14398122017-09-22 14:26:04 +0200793 return 1;
794 }
Willy Tarreau0b559072018-02-26 15:22:17 +0100795
796 if ((h2c->flags & H2_CF_DEM_SALLOC) &&
797 (h2s = h2c_st_by_id(h2c, h2c->dsi)) && h2s->cs &&
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100798 b_alloc(&h2s->rxbuf)) {
Willy Tarreau0b559072018-02-26 15:22:17 +0100799 h2c->flags &= ~H2_CF_DEM_SALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200800 h2c_restart_reading(h2c, 1);
Willy Tarreau0b559072018-02-26 15:22:17 +0100801 return 1;
802 }
803
Willy Tarreau14398122017-09-22 14:26:04 +0200804 return 0;
805}
806
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200807static inline struct buffer *h2_get_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200808{
809 struct buffer *buf = NULL;
810
Willy Tarreau2b718102021-04-21 07:32:39 +0200811 if (likely(!LIST_INLIST(&h2c->buf_wait.list)) &&
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100812 unlikely((buf = b_alloc(bptr)) == NULL)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100813 h2c->buf_wait.target = h2c;
814 h2c->buf_wait.wakeup_cb = h2_buf_available;
Willy Tarreau2b718102021-04-21 07:32:39 +0200815 LIST_APPEND(&ti->buffer_wq, &h2c->buf_wait.list);
Willy Tarreau14398122017-09-22 14:26:04 +0200816 }
817 return buf;
818}
819
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200820static inline void h2_release_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200821{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200822 if (bptr->size) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100823 b_free(bptr);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +0100824 offer_buffers(NULL, 1);
Willy Tarreau14398122017-09-22 14:26:04 +0200825 }
826}
827
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200828static inline void h2_release_mbuf(struct h2c *h2c)
829{
830 struct buffer *buf;
831 unsigned int count = 0;
832
833 while (b_size(buf = br_head_pick(h2c->mbuf))) {
834 b_free(buf);
835 count++;
836 }
837 if (count)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +0100838 offer_buffers(NULL, count);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200839}
840
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100841/* returns the number of allocatable outgoing streams for the connection taking
842 * the last_sid and the reserved ones into account.
843 */
844static inline int h2_streams_left(const struct h2c *h2c)
845{
846 int ret;
847
848 /* consider the number of outgoing streams we're allowed to create before
849 * reaching the last GOAWAY frame seen. max_id is the last assigned id,
850 * nb_reserved is the number of streams which don't yet have an ID.
851 */
852 ret = (h2c->last_sid >= 0) ? h2c->last_sid : 0x7FFFFFFF;
853 ret = (unsigned int)(ret - h2c->max_id) / 2 - h2c->nb_reserved - 1;
854 if (ret < 0)
855 ret = 0;
856 return ret;
857}
858
Willy Tarreau00f18a32019-01-26 12:19:01 +0100859/* returns the number of streams in use on a connection to figure if it's
860 * idle or not. We check nb_cs and not nb_streams as the caller will want
861 * to know if it was the last one after a detach().
862 */
863static int h2_used_streams(struct connection *conn)
864{
865 struct h2c *h2c = conn->ctx;
866
867 return h2c->nb_cs;
868}
869
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100870/* returns the number of concurrent streams available on the connection */
Olivier Houchardd540b362018-11-05 18:37:53 +0100871static int h2_avail_streams(struct connection *conn)
872{
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100873 struct server *srv = objt_server(conn->target);
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100874 struct h2c *h2c = conn->ctx;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100875 int ret1, ret2;
Olivier Houchardd540b362018-11-05 18:37:53 +0100876
Willy Tarreau6afec462019-01-28 06:40:19 +0100877 /* RFC7540#6.8: Receivers of a GOAWAY frame MUST NOT open additional
878 * streams on the connection.
879 */
880 if (h2c->last_sid >= 0)
881 return 0;
882
Willy Tarreauc61966f2019-10-31 15:10:03 +0100883 if (h2c->st0 >= H2_CS_ERROR)
884 return 0;
885
Willy Tarreau86949782019-01-31 10:42:05 +0100886 /* note: may be negative if a SETTINGS frame changes the limit */
887 ret1 = h2c->streams_limit - h2c->nb_streams;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100888
889 /* we must also consider the limit imposed by stream IDs */
890 ret2 = h2_streams_left(h2c);
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100891 ret1 = MIN(ret1, ret2);
Willy Tarreau86949782019-01-31 10:42:05 +0100892 if (ret1 > 0 && srv && srv->max_reuse >= 0) {
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100893 ret2 = h2c->stream_cnt <= srv->max_reuse ? srv->max_reuse - h2c->stream_cnt + 1: 0;
894 ret1 = MIN(ret1, ret2);
895 }
896 return ret1;
Olivier Houchardd540b362018-11-05 18:37:53 +0100897}
898
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200899
Willy Tarreau62f52692017-10-08 23:01:42 +0200900/*****************************************************************/
901/* functions below are dedicated to the mux setup and management */
902/*****************************************************************/
903
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200904/* Initialize the mux once it's attached. For outgoing connections, the context
905 * is already initialized before installing the mux, so we detect incoming
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200906 * connections from the fact that the context is still NULL (even during mux
907 * upgrades). <input> is always used as Input buffer and may contain data. It is
908 * the caller responsibility to not reuse it anymore. Returns < 0 on error.
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200909 */
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200910static int h2_init(struct connection *conn, struct proxy *prx, struct session *sess,
911 struct buffer *input)
Willy Tarreau32218eb2017-09-22 08:07:25 +0200912{
913 struct h2c *h2c;
Willy Tarreauea392822017-10-31 10:02:25 +0100914 struct task *t = NULL;
Christopher Fauletf81ef032019-10-04 15:19:43 +0200915 void *conn_ctx = conn->ctx;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200916
Christopher Fauletf81ef032019-10-04 15:19:43 +0200917 TRACE_ENTER(H2_EV_H2C_NEW);
Willy Tarreau7838a792019-08-12 18:42:03 +0200918
Willy Tarreaubafbe012017-11-24 17:34:44 +0100919 h2c = pool_alloc(pool_head_h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200920 if (!h2c)
mildiscd2d7de2018-10-02 16:44:18 +0200921 goto fail_no_h2c;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200922
Christopher Faulete9b70722019-04-08 10:46:02 +0200923 if (conn_is_back(conn)) {
Willy Tarreau01b44822018-10-03 14:26:37 +0200924 h2c->flags = H2_CF_IS_BACK;
925 h2c->shut_timeout = h2c->timeout = prx->timeout.server;
926 if (tick_isset(prx->timeout.serverfin))
927 h2c->shut_timeout = prx->timeout.serverfin;
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100928
929 h2c->px_counters = EXTRA_COUNTERS_GET(prx->extra_counters_be,
930 &h2_stats_module);
Willy Tarreau01b44822018-10-03 14:26:37 +0200931 } else {
932 h2c->flags = H2_CF_NONE;
933 h2c->shut_timeout = h2c->timeout = prx->timeout.client;
934 if (tick_isset(prx->timeout.clientfin))
935 h2c->shut_timeout = prx->timeout.clientfin;
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100936
937 h2c->px_counters = EXTRA_COUNTERS_GET(prx->extra_counters_fe,
938 &h2_stats_module);
Willy Tarreau01b44822018-10-03 14:26:37 +0200939 }
Willy Tarreau3f133572017-10-31 19:21:06 +0100940
Willy Tarreau0b37d652018-10-03 10:33:02 +0200941 h2c->proxy = prx;
Willy Tarreau33400292017-11-05 11:23:40 +0100942 h2c->task = NULL;
Willy Tarreau3f133572017-10-31 19:21:06 +0100943 if (tick_isset(h2c->timeout)) {
944 t = task_new(tid_bit);
945 if (!t)
946 goto fail;
947
948 h2c->task = t;
949 t->process = h2_timeout_task;
950 t->context = h2c;
951 t->expire = tick_add(now_ms, h2c->timeout);
952 }
Willy Tarreauea392822017-10-31 10:02:25 +0100953
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200954 h2c->wait_event.tasklet = tasklet_new();
955 if (!h2c->wait_event.tasklet)
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200956 goto fail;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200957 h2c->wait_event.tasklet->process = h2_io_cb;
958 h2c->wait_event.tasklet->context = h2c;
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100959 h2c->wait_event.events = 0;
Amaury Denoyelled3a88c12021-05-03 10:47:51 +0200960 if (!conn_is_back(conn)) {
961 /* Connection might already be in the stopping_list if subject
962 * to h1->h2 upgrade.
963 */
964 if (!LIST_INLIST(&conn->stopping_list)) {
965 LIST_APPEND(&mux_stopping_data[tid].list,
966 &conn->stopping_list);
967 }
968 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200969
Willy Tarreau2bdcc702020-05-19 11:31:11 +0200970 h2c->ddht = hpack_dht_alloc();
Willy Tarreau32218eb2017-09-22 08:07:25 +0200971 if (!h2c->ddht)
972 goto fail;
973
974 /* Initialise the context. */
975 h2c->st0 = H2_CS_PREFACE;
976 h2c->conn = conn;
Willy Tarreau2e2083a2019-01-31 10:34:07 +0100977 h2c->streams_limit = h2_settings_max_concurrent_streams;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200978 h2c->max_id = -1;
979 h2c->errcode = H2_ERR_NO_ERROR;
Willy Tarreau97aaa672018-12-23 09:49:04 +0100980 h2c->rcvd_c = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200981 h2c->rcvd_s = 0;
Willy Tarreau49745612017-12-03 18:56:02 +0100982 h2c->nb_streams = 0;
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200983 h2c->nb_cs = 0;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100984 h2c->nb_reserved = 0;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100985 h2c->stream_cnt = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200986
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200987 h2c->dbuf = *input;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200988 h2c->dsi = -1;
989 h2c->msi = -1;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100990
Willy Tarreau32218eb2017-09-22 08:07:25 +0200991 h2c->last_sid = -1;
992
Willy Tarreau51330962019-05-26 09:38:07 +0200993 br_init(h2c->mbuf, sizeof(h2c->mbuf) / sizeof(h2c->mbuf[0]));
Willy Tarreau32218eb2017-09-22 08:07:25 +0200994 h2c->miw = 65535; /* mux initial window size */
995 h2c->mws = 65535; /* mux window size */
996 h2c->mfs = 16384; /* initial max frame size */
Willy Tarreau751f2d02018-10-05 09:35:00 +0200997 h2c->streams_by_id = EB_ROOT;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200998 LIST_INIT(&h2c->send_list);
999 LIST_INIT(&h2c->fctl_list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +02001000 LIST_INIT(&h2c->blocked_list);
Willy Tarreau90f366b2021-02-20 11:49:49 +01001001 LIST_INIT(&h2c->buf_wait.list);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001002
Christopher Fauletf81ef032019-10-04 15:19:43 +02001003 conn->ctx = h2c;
1004
Willy Tarreaue2f68e92021-06-16 17:47:24 +02001005 TRACE_USER("new H2 connection", H2_EV_H2C_NEW, conn);
1006
Willy Tarreau3f133572017-10-31 19:21:06 +01001007 if (t)
1008 task_queue(t);
Willy Tarreauea392822017-10-31 10:02:25 +01001009
Willy Tarreau01b44822018-10-03 14:26:37 +02001010 if (h2c->flags & H2_CF_IS_BACK) {
1011 /* FIXME: this is temporary, for outgoing connections we need
1012 * to immediately allocate a stream until the code is modified
1013 * so that the caller calls ->attach(). For now the outgoing cs
Christopher Fauletf81ef032019-10-04 15:19:43 +02001014 * is stored as conn->ctx by the caller and saved in conn_ctx.
Willy Tarreau01b44822018-10-03 14:26:37 +02001015 */
1016 struct h2s *h2s;
1017
Christopher Fauletf81ef032019-10-04 15:19:43 +02001018 h2s = h2c_bck_stream_new(h2c, conn_ctx, sess);
Willy Tarreau01b44822018-10-03 14:26:37 +02001019 if (!h2s)
1020 goto fail_stream;
1021 }
1022
Willy Tarreau4781b152021-04-06 13:53:36 +02001023 HA_ATOMIC_INC(&h2c->px_counters->open_conns);
1024 HA_ATOMIC_INC(&h2c->px_counters->total_conns);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001025
Willy Tarreau0f383582018-10-03 14:22:21 +02001026 /* prepare to read something */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02001027 h2c_restart_reading(h2c, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001028 TRACE_LEAVE(H2_EV_H2C_NEW, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001029 return 0;
Willy Tarreau01b44822018-10-03 14:26:37 +02001030 fail_stream:
1031 hpack_dht_free(h2c->ddht);
mildiscd2d7de2018-10-02 16:44:18 +02001032 fail:
Willy Tarreauf6562792019-05-07 19:05:35 +02001033 task_destroy(t);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001034 if (h2c->wait_event.tasklet)
1035 tasklet_free(h2c->wait_event.tasklet);
Willy Tarreaubafbe012017-11-24 17:34:44 +01001036 pool_free(pool_head_h2c, h2c);
mildiscd2d7de2018-10-02 16:44:18 +02001037 fail_no_h2c:
Willy Tarreau8802bf12022-01-12 17:24:26 +01001038 if (!conn_is_back(conn))
1039 LIST_DEL_INIT(&conn->stopping_list);
Christopher Fauletf81ef032019-10-04 15:19:43 +02001040 conn->ctx = conn_ctx; /* restore saved ctx */
1041 TRACE_DEVEL("leaving in error", H2_EV_H2C_NEW|H2_EV_H2C_END|H2_EV_H2C_ERR);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001042 return -1;
1043}
1044
Willy Tarreau751f2d02018-10-05 09:35:00 +02001045/* returns the next allocatable outgoing stream ID for the H2 connection, or
1046 * -1 if no more is allocatable.
1047 */
1048static inline int32_t h2c_get_next_sid(const struct h2c *h2c)
1049{
1050 int32_t id = (h2c->max_id + 1) | 1;
Willy Tarreaua80dca82019-01-24 17:08:28 +01001051
1052 if ((id & 0x80000000U) || (h2c->last_sid >= 0 && id > h2c->last_sid))
Willy Tarreau751f2d02018-10-05 09:35:00 +02001053 id = -1;
1054 return id;
1055}
1056
Willy Tarreau2373acc2017-10-12 17:35:14 +02001057/* returns the stream associated with id <id> or NULL if not found */
1058static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id)
1059{
1060 struct eb32_node *node;
1061
Willy Tarreau751f2d02018-10-05 09:35:00 +02001062 if (id == 0)
1063 return (struct h2s *)h2_closed_stream;
1064
Willy Tarreau2a856182017-05-16 15:20:39 +02001065 if (id > h2c->max_id)
1066 return (struct h2s *)h2_idle_stream;
1067
Willy Tarreau2373acc2017-10-12 17:35:14 +02001068 node = eb32_lookup(&h2c->streams_by_id, id);
1069 if (!node)
Willy Tarreau2a856182017-05-16 15:20:39 +02001070 return (struct h2s *)h2_closed_stream;
Willy Tarreau2373acc2017-10-12 17:35:14 +02001071
1072 return container_of(node, struct h2s, by_id);
1073}
1074
Christopher Faulet73c12072019-04-08 11:23:22 +02001075/* release function. This one should be called to free all resources allocated
1076 * to the mux.
Willy Tarreau62f52692017-10-08 23:01:42 +02001077 */
Christopher Faulet73c12072019-04-08 11:23:22 +02001078static void h2_release(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02001079{
William Dauchy477757c2020-08-07 22:19:23 +02001080 struct connection *conn = NULL;
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001081
Willy Tarreau7838a792019-08-12 18:42:03 +02001082 TRACE_ENTER(H2_EV_H2C_END);
1083
Willy Tarreau32218eb2017-09-22 08:07:25 +02001084 if (h2c) {
Christopher Faulet61840e72019-04-15 09:33:32 +02001085 /* The connection must be aattached to this mux to be released */
1086 if (h2c->conn && h2c->conn->ctx == h2c)
1087 conn = h2c->conn;
1088
Willy Tarreau7838a792019-08-12 18:42:03 +02001089 TRACE_DEVEL("freeing h2c", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001090 hpack_dht_free(h2c->ddht);
Willy Tarreau14398122017-09-22 14:26:04 +02001091
Willy Tarreau2b718102021-04-21 07:32:39 +02001092 if (LIST_INLIST(&h2c->buf_wait.list))
Willy Tarreau90f366b2021-02-20 11:49:49 +01001093 LIST_DEL_INIT(&h2c->buf_wait.list);
Willy Tarreau14398122017-09-22 14:26:04 +02001094
Willy Tarreau44e973f2018-03-01 17:49:30 +01001095 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau2e3c0002019-05-26 09:45:23 +02001096 h2_release_mbuf(h2c);
Willy Tarreau44e973f2018-03-01 17:49:30 +01001097
Willy Tarreauea392822017-10-31 10:02:25 +01001098 if (h2c->task) {
Willy Tarreau0975f112018-03-29 15:22:59 +02001099 h2c->task->context = NULL;
1100 task_wakeup(h2c->task, TASK_WOKEN_OTHER);
Willy Tarreauea392822017-10-31 10:02:25 +01001101 h2c->task = NULL;
1102 }
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001103 if (h2c->wait_event.tasklet)
1104 tasklet_free(h2c->wait_event.tasklet);
Christopher Faulet21d849f2019-09-18 11:07:20 +02001105 if (conn && h2c->wait_event.events != 0)
Olivier Houcharde179d0e2019-03-21 18:27:17 +01001106 conn->xprt->unsubscribe(conn, conn->xprt_ctx, h2c->wait_event.events,
Christopher Faulet21d849f2019-09-18 11:07:20 +02001107 &h2c->wait_event);
Willy Tarreauea392822017-10-31 10:02:25 +01001108
Willy Tarreau4781b152021-04-06 13:53:36 +02001109 HA_ATOMIC_DEC(&h2c->px_counters->open_conns);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001110
Willy Tarreaubafbe012017-11-24 17:34:44 +01001111 pool_free(pool_head_h2c, h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001112 }
1113
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001114 if (conn) {
Amaury Denoyelled3a88c12021-05-03 10:47:51 +02001115 if (!conn_is_back(conn))
1116 LIST_DEL_INIT(&conn->stopping_list);
1117
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001118 conn->mux = NULL;
1119 conn->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02001120 TRACE_DEVEL("freeing conn", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001121
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001122 conn_stop_tracking(conn);
Willy Tarreaudaa0e5f2021-10-21 22:24:31 +02001123
1124 /* there might be a GOAWAY frame still pending in the TCP
1125 * stack, and if the peer continues to send (i.e. window
1126 * updates etc), this can result in losing the GOAWAY. For
1127 * this reason we try to drain anything received in between.
1128 */
1129 conn->flags |= CO_FL_WANT_DRAIN;
1130
1131 conn_xprt_shutw(conn);
1132 conn_xprt_close(conn);
1133 conn_sock_shutw(conn, !conn_is_back(conn));
1134 conn_ctrl_close(conn);
1135
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001136 if (conn->destroy_cb)
1137 conn->destroy_cb(conn);
1138 conn_free(conn);
1139 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001140
1141 TRACE_LEAVE(H2_EV_H2C_END);
Willy Tarreau62f52692017-10-08 23:01:42 +02001142}
1143
1144
Willy Tarreau71681172017-10-23 14:39:06 +02001145/******************************************************/
1146/* functions below are for the H2 protocol processing */
1147/******************************************************/
1148
1149/* returns the stream if of stream <h2s> or 0 if <h2s> is NULL */
Willy Tarreau1f094672017-11-20 21:27:45 +01001150static inline __maybe_unused int h2s_id(const struct h2s *h2s)
Willy Tarreau71681172017-10-23 14:39:06 +02001151{
1152 return h2s ? h2s->id : 0;
1153}
1154
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001155/* returns the sum of the stream's own window size and the mux's initial
1156 * window, which together form the stream's effective window size.
1157 */
1158static inline int h2s_mws(const struct h2s *h2s)
1159{
1160 return h2s->sws + h2s->h2c->miw;
1161}
1162
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001163/* returns true of the mux is currently busy as seen from stream <h2s> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001164static inline __maybe_unused int h2c_mux_busy(const struct h2c *h2c, const struct h2s *h2s)
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001165{
1166 if (h2c->msi < 0)
1167 return 0;
1168
1169 if (h2c->msi == h2s_id(h2s))
1170 return 0;
1171
1172 return 1;
1173}
1174
Willy Tarreau741d6df2017-10-17 08:00:59 +02001175/* marks an error on the connection */
Willy Tarreau1f094672017-11-20 21:27:45 +01001176static inline __maybe_unused void h2c_error(struct h2c *h2c, enum h2_err err)
Willy Tarreau741d6df2017-10-17 08:00:59 +02001177{
Willy Tarreau022e5e52020-09-10 09:33:15 +02001178 TRACE_POINT(H2_EV_H2C_ERR, h2c->conn, 0, 0, (void *)(long)(err));
Willy Tarreau741d6df2017-10-17 08:00:59 +02001179 h2c->errcode = err;
1180 h2c->st0 = H2_CS_ERROR;
1181}
1182
Willy Tarreau175cebb2019-01-24 10:02:24 +01001183/* marks an error on the stream. It may also update an already closed stream
1184 * (e.g. to report an error after an RST was received).
1185 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001186static inline __maybe_unused void h2s_error(struct h2s *h2s, enum h2_err err)
Willy Tarreau2e43f082017-10-17 08:03:59 +02001187{
Willy Tarreau175cebb2019-01-24 10:02:24 +01001188 if (h2s->id && h2s->st != H2_SS_ERROR) {
Willy Tarreau022e5e52020-09-10 09:33:15 +02001189 TRACE_POINT(H2_EV_H2S_ERR, h2s->h2c->conn, h2s, 0, (void *)(long)(err));
Willy Tarreau2e43f082017-10-17 08:03:59 +02001190 h2s->errcode = err;
Willy Tarreau175cebb2019-01-24 10:02:24 +01001191 if (h2s->st < H2_SS_ERROR)
1192 h2s->st = H2_SS_ERROR;
Willy Tarreauec988c72018-12-19 18:00:29 +01001193 if (h2s->cs)
1194 cs_set_error(h2s->cs);
Willy Tarreau2e43f082017-10-17 08:03:59 +02001195 }
1196}
1197
Willy Tarreau7e094452018-12-19 18:08:52 +01001198/* attempt to notify the data layer of recv availability */
1199static void __maybe_unused h2s_notify_recv(struct h2s *h2s)
1200{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001201 if (h2s->subs && h2s->subs->events & SUB_RETRY_RECV) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001202 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01001203 tasklet_wakeup(h2s->subs->tasklet);
1204 h2s->subs->events &= ~SUB_RETRY_RECV;
1205 if (!h2s->subs->events)
1206 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001207 }
1208}
1209
1210/* attempt to notify the data layer of send availability */
1211static void __maybe_unused h2s_notify_send(struct h2s *h2s)
1212{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001213 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001214 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01001215 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01001216 tasklet_wakeup(h2s->subs->tasklet);
1217 h2s->subs->events &= ~SUB_RETRY_SEND;
1218 if (!h2s->subs->events)
1219 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001220 }
Willy Tarreau5723f292020-01-10 15:16:57 +01001221 else if (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) {
1222 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
1223 tasklet_wakeup(h2s->shut_tl);
1224 }
Willy Tarreau7e094452018-12-19 18:08:52 +01001225}
1226
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001227/* alerts the data layer, trying to wake it up by all means, following
1228 * this sequence :
1229 * - if the h2s' data layer is subscribed to recv, then it's woken up for recv
1230 * - if its subscribed to send, then it's woken up for send
1231 * - if it was subscribed to neither, its ->wake() callback is called
1232 * It is safe to call this function with a closed stream which doesn't have a
1233 * conn_stream anymore.
1234 */
1235static void __maybe_unused h2s_alert(struct h2s *h2s)
1236{
Willy Tarreau7838a792019-08-12 18:42:03 +02001237 TRACE_ENTER(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
1238
Willy Tarreauf96508a2020-01-10 11:12:48 +01001239 if (h2s->subs ||
Willy Tarreau5723f292020-01-10 15:16:57 +01001240 (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW))) {
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001241 h2s_notify_recv(h2s);
1242 h2s_notify_send(h2s);
1243 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001244 else if (h2s->cs && h2s->cs->data_cb->wake != NULL) {
1245 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001246 h2s->cs->data_cb->wake(h2s->cs);
Willy Tarreau7838a792019-08-12 18:42:03 +02001247 }
1248
1249 TRACE_LEAVE(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001250}
1251
Willy Tarreaue4820742017-07-27 13:37:23 +02001252/* writes the 24-bit frame size <len> at address <frame> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001253static inline __maybe_unused void h2_set_frame_size(void *frame, uint32_t len)
Willy Tarreaue4820742017-07-27 13:37:23 +02001254{
1255 uint8_t *out = frame;
1256
1257 *out = len >> 16;
1258 write_n16(out + 1, len);
1259}
1260
Willy Tarreau54c15062017-10-10 17:10:03 +02001261/* reads <bytes> bytes from buffer <b> starting at relative offset <o> from the
1262 * current pointer, dealing with wrapping, and stores the result in <dst>. It's
1263 * the caller's responsibility to verify that there are at least <bytes> bytes
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001264 * available in the buffer's input prior to calling this function. The buffer
1265 * is assumed not to hold any output data.
Willy Tarreau54c15062017-10-10 17:10:03 +02001266 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001267static inline __maybe_unused void h2_get_buf_bytes(void *dst, size_t bytes,
Willy Tarreau54c15062017-10-10 17:10:03 +02001268 const struct buffer *b, int o)
1269{
Willy Tarreau591d4452018-06-15 17:21:00 +02001270 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 +02001271}
1272
Willy Tarreau1f094672017-11-20 21:27:45 +01001273static inline __maybe_unused uint16_t h2_get_n16(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001274{
Willy Tarreau591d4452018-06-15 17:21:00 +02001275 return readv_n16(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001276}
1277
Willy Tarreau1f094672017-11-20 21:27:45 +01001278static inline __maybe_unused uint32_t h2_get_n32(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001279{
Willy Tarreau591d4452018-06-15 17:21:00 +02001280 return readv_n32(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001281}
1282
Willy Tarreau1f094672017-11-20 21:27:45 +01001283static inline __maybe_unused uint64_t h2_get_n64(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001284{
Willy Tarreau591d4452018-06-15 17:21:00 +02001285 return readv_n64(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001286}
1287
1288
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001289/* Peeks an H2 frame header from offset <o> of buffer <b> into descriptor <h>.
1290 * The algorithm is not obvious. It turns out that H2 headers are neither
1291 * aligned nor do they use regular sizes. And to add to the trouble, the buffer
1292 * may wrap so each byte read must be checked. The header is formed like this :
Willy Tarreau715d5312017-07-11 15:20:24 +02001293 *
1294 * b0 b1 b2 b3 b4 b5..b8
1295 * +----------+---------+--------+----+----+----------------------+
1296 * |len[23:16]|len[15:8]|len[7:0]|type|flag|sid[31:0] (big endian)|
1297 * +----------+---------+--------+----+----+----------------------+
1298 *
1299 * Here we read a big-endian 64 bit word from h[1]. This way in a single read
1300 * we get the sid properly aligned and ordered, and 16 bits of len properly
1301 * ordered as well. The type and flags can be extracted using bit shifts from
1302 * the word, and only one extra read is needed to fetch len[16:23].
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001303 * Returns zero if some bytes are missing, otherwise non-zero on success. The
1304 * buffer is assumed not to contain any output data.
Willy Tarreau715d5312017-07-11 15:20:24 +02001305 */
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001306static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, int o, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001307{
1308 uint64_t w;
1309
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001310 if (b_data(b) < o + 9)
Willy Tarreau715d5312017-07-11 15:20:24 +02001311 return 0;
1312
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001313 w = h2_get_n64(b, o + 1);
1314 h->len = *(uint8_t*)b_peek(b, o) << 16;
Willy Tarreau715d5312017-07-11 15:20:24 +02001315 h->sid = w & 0x7FFFFFFF; /* RFC7540#4.1: R bit must be ignored */
1316 h->ff = w >> 32;
1317 h->ft = w >> 40;
1318 h->len += w >> 48;
1319 return 1;
1320}
1321
1322/* skip the next 9 bytes corresponding to the frame header possibly parsed by
1323 * h2_peek_frame_hdr() above.
1324 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001325static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b)
Willy Tarreau715d5312017-07-11 15:20:24 +02001326{
Willy Tarreaue5f12ce2018-06-15 10:28:05 +02001327 b_del(b, 9);
Willy Tarreau715d5312017-07-11 15:20:24 +02001328}
1329
1330/* same as above, automatically advances the buffer on success */
Willy Tarreau1f094672017-11-20 21:27:45 +01001331static inline __maybe_unused int h2_get_frame_hdr(struct buffer *b, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001332{
1333 int ret;
1334
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001335 ret = h2_peek_frame_hdr(b, 0, h);
Willy Tarreau715d5312017-07-11 15:20:24 +02001336 if (ret > 0)
1337 h2_skip_frame_hdr(b);
1338 return ret;
1339}
1340
Willy Tarreaucb985a42019-10-07 16:56:34 +02001341
1342/* try to fragment the headers frame present at the beginning of buffer <b>,
1343 * enforcing a limit of <mfs> bytes per frame. Returns 0 on failure, 1 on
1344 * success. Typical causes of failure include a buffer not large enough to
1345 * add extra frame headers. The existing frame size is read in the current
1346 * frame. Its EH flag will be cleared if CONTINUATION frames need to be added,
1347 * and its length will be adjusted. The stream ID for continuation frames will
1348 * be copied from the initial frame's.
1349 */
1350static int h2_fragment_headers(struct buffer *b, uint32_t mfs)
1351{
1352 size_t remain = b->data - 9;
1353 int extra_frames = (remain - 1) / mfs;
1354 size_t fsize;
1355 char *fptr;
1356 int frame;
1357
1358 if (b->data <= mfs + 9)
1359 return 1;
1360
1361 /* Too large a frame, we need to fragment it using CONTINUATION
1362 * frames. We start from the end and move tails as needed.
1363 */
1364 if (b->data + extra_frames * 9 > b->size)
1365 return 0;
1366
1367 for (frame = extra_frames; frame; frame--) {
1368 fsize = ((remain - 1) % mfs) + 1;
1369 remain -= fsize;
1370
1371 /* move data */
1372 fptr = b->area + 9 + remain + (frame - 1) * 9;
1373 memmove(fptr + 9, b->area + 9 + remain, fsize);
1374 b->data += 9;
1375
1376 /* write new frame header */
1377 h2_set_frame_size(fptr, fsize);
1378 fptr[3] = H2_FT_CONTINUATION;
1379 fptr[4] = (frame == extra_frames) ? H2_F_HEADERS_END_HEADERS : 0;
1380 write_n32(fptr + 5, read_n32(b->area + 5));
1381 }
1382
1383 b->area[4] &= ~H2_F_HEADERS_END_HEADERS;
1384 h2_set_frame_size(b->area, remain);
1385 return 1;
1386}
1387
1388
Willy Tarreau00dd0782018-03-01 16:31:34 +01001389/* marks stream <h2s> as CLOSED and decrement the number of active streams for
1390 * its connection if the stream was not yet closed. Please use this exclusively
1391 * before closing a stream to ensure stream count is well maintained.
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001392 */
Willy Tarreau00dd0782018-03-01 16:31:34 +01001393static inline void h2s_close(struct h2s *h2s)
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001394{
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001395 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001396 TRACE_ENTER(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001397 h2s->h2c->nb_streams--;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001398 if (!h2s->id)
1399 h2s->h2c->nb_reserved--;
Willy Tarreaua27db382019-03-25 18:13:16 +01001400 if (h2s->cs) {
Willy Tarreaua27db382019-03-25 18:13:16 +01001401 if (!(h2s->cs->flags & CS_FL_EOS) && !b_data(&h2s->rxbuf))
1402 h2s_notify_recv(h2s);
1403 }
Willy Tarreau4781b152021-04-06 13:53:36 +02001404 HA_ATOMIC_DEC(&h2s->h2c->px_counters->open_streams);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001405
Willy Tarreau7838a792019-08-12 18:42:03 +02001406 TRACE_LEAVE(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001407 }
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001408 h2s->st = H2_SS_CLOSED;
1409}
1410
Willy Tarreau71049cc2018-03-28 13:56:39 +02001411/* detaches an H2 stream from its H2C and releases it to the H2S pool. */
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001412/* h2s_destroy should only ever be called by the thread that owns the stream,
1413 * that means that a tasklet should be used if we want to destroy the h2s
1414 * from another thread
1415 */
Willy Tarreau71049cc2018-03-28 13:56:39 +02001416static void h2s_destroy(struct h2s *h2s)
Willy Tarreau0a10de62018-03-01 16:27:53 +01001417{
Willy Tarreau7838a792019-08-12 18:42:03 +02001418 struct connection *conn = h2s->h2c->conn;
1419
1420 TRACE_ENTER(H2_EV_H2S_END, conn, h2s);
1421
Willy Tarreau0a10de62018-03-01 16:27:53 +01001422 h2s_close(h2s);
1423 eb32_delete(&h2s->by_id);
Olivier Houchard638b7992018-08-16 15:41:52 +02001424 if (b_size(&h2s->rxbuf)) {
1425 b_free(&h2s->rxbuf);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01001426 offer_buffers(NULL, 1);
Olivier Houchard638b7992018-08-16 15:41:52 +02001427 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001428
1429 if (h2s->subs)
1430 h2s->subs->events = 0;
1431
Joseph Herlantd77575d2018-11-25 10:54:45 -08001432 /* There's no need to explicitly call unsubscribe here, the only
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001433 * reference left would be in the h2c send_list/fctl_list, and if
1434 * we're in it, we're getting out anyway
1435 */
Olivier Houchardd360ac62019-03-22 17:37:16 +01001436 LIST_DEL_INIT(&h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01001437
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001438 /* ditto, calling tasklet_free() here should be ok */
Willy Tarreau5723f292020-01-10 15:16:57 +01001439 tasklet_free(h2s->shut_tl);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001440 pool_free(pool_head_h2s, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001441
1442 TRACE_LEAVE(H2_EV_H2S_END, conn);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001443}
1444
Willy Tarreaua8e49542018-10-03 18:53:55 +02001445/* allocates a new stream <id> for connection <h2c> and adds it into h2c's
1446 * stream tree. In case of error, nothing is added and NULL is returned. The
1447 * causes of errors can be any failed memory allocation. The caller is
1448 * responsible for checking if the connection may support an extra stream
1449 * prior to calling this function.
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001450 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02001451static struct h2s *h2s_new(struct h2c *h2c, int id)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001452{
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001453 struct h2s *h2s;
1454
Willy Tarreau7838a792019-08-12 18:42:03 +02001455 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1456
Willy Tarreaubafbe012017-11-24 17:34:44 +01001457 h2s = pool_alloc(pool_head_h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001458 if (!h2s)
1459 goto out;
1460
Willy Tarreau5723f292020-01-10 15:16:57 +01001461 h2s->shut_tl = tasklet_new();
1462 if (!h2s->shut_tl) {
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001463 pool_free(pool_head_h2s, h2s);
1464 goto out;
1465 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001466 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01001467 h2s->shut_tl->process = h2_deferred_shut;
1468 h2s->shut_tl->context = h2s;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001469 LIST_INIT(&h2s->list);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001470 h2s->h2c = h2c;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001471 h2s->cs = NULL;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001472 h2s->sws = 0;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001473 h2s->flags = H2_SF_NONE;
1474 h2s->errcode = H2_ERR_NO_ERROR;
1475 h2s->st = H2_SS_IDLE;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02001476 h2s->status = 0;
Willy Tarreau1915ca22019-01-24 11:49:37 +01001477 h2s->body_len = 0;
Olivier Houchard638b7992018-08-16 15:41:52 +02001478 h2s->rxbuf = BUF_NULL;
Amaury Denoyelle74162742020-12-11 17:53:05 +01001479 memset(h2s->upgrade_protocol, 0, sizeof(h2s->upgrade_protocol));
Willy Tarreau751f2d02018-10-05 09:35:00 +02001480
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001481 h2s->by_id.key = h2s->id = id;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001482 if (id > 0)
1483 h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001484 else
1485 h2c->nb_reserved++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001486
1487 eb32_insert(&h2c->streams_by_id, &h2s->by_id);
Willy Tarreau49745612017-12-03 18:56:02 +01001488 h2c->nb_streams++;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001489 h2c->stream_cnt++;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001490
Willy Tarreau4781b152021-04-06 13:53:36 +02001491 HA_ATOMIC_INC(&h2c->px_counters->open_streams);
1492 HA_ATOMIC_INC(&h2c->px_counters->total_streams);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001493
Willy Tarreau7838a792019-08-12 18:42:03 +02001494 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001495 return h2s;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001496 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001497 TRACE_DEVEL("leaving in error", H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001498 return NULL;
1499}
1500
1501/* creates a new stream <id> on the h2c connection and returns it, or NULL in
Christopher Faulet7d013e72020-12-15 16:56:50 +01001502 * case of memory allocation error. <input> is used as input buffer for the new
1503 * stream. On success, it is transferred to the stream and the mux is no longer
1504 * responsible of it. On error, <input> is unchanged, thus the mux must still
1505 * take care of it.
Willy Tarreaua8e49542018-10-03 18:53:55 +02001506 */
Amaury Denoyelleee7fcd52021-10-18 14:45:49 +02001507static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id, struct buffer *input, uint32_t flags)
Willy Tarreaua8e49542018-10-03 18:53:55 +02001508{
1509 struct session *sess = h2c->conn->owner;
1510 struct conn_stream *cs;
1511 struct h2s *h2s;
1512
Willy Tarreau7838a792019-08-12 18:42:03 +02001513 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1514
Willy Tarreaua8e49542018-10-03 18:53:55 +02001515 if (h2c->nb_streams >= h2_settings_max_concurrent_streams)
1516 goto out;
1517
1518 h2s = h2s_new(h2c, id);
1519 if (!h2s)
1520 goto out;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001521
Christopher Faulet236c93b2020-07-02 09:19:54 +02001522 cs = cs_new(h2c->conn, h2c->conn->target);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001523 if (!cs)
1524 goto out_close;
1525
Olivier Houchard746fb772018-12-15 19:42:00 +01001526 cs->flags |= CS_FL_NOT_FIRST;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001527 h2s->cs = cs;
1528 cs->ctx = h2s;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001529 h2c->nb_cs++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001530
Amaury Denoyelleee7fcd52021-10-18 14:45:49 +02001531 /* FIXME wrong analogy between ext-connect and websocket, this need to
1532 * be refine.
1533 */
1534 if (flags & H2_SF_EXT_CONNECT_RCVD)
1535 cs->flags |= CS_FL_WEBSOCKET;
1536
Willy Tarreaua217df92022-02-04 09:05:37 +01001537 /* The stream will record the request's accept date (which is either the
1538 * end of the connection's or the date immediately after the previous
1539 * request) and the idle time, which is the delay since the previous
1540 * request. We can set the value now, it will be copied by stream_new().
1541 */
1542 sess->t_idle = tv_ms_elapsed(&sess->tv_accept, &now) - sess->t_handshake;
Christopher Faulet7d013e72020-12-15 16:56:50 +01001543 if (stream_create_from_cs(cs, input) < 0)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001544 goto out_free_cs;
1545
Willy Tarreau590a0512018-09-05 11:56:48 +02001546 /* We want the accept date presented to the next stream to be the one
1547 * we have now, the handshake time to be null (since the next stream
1548 * is not delayed by a handshake), and the idle time to count since
1549 * right now.
1550 */
1551 sess->accept_date = date;
1552 sess->tv_accept = now;
1553 sess->t_handshake = 0;
Willy Tarreaua217df92022-02-04 09:05:37 +01001554 sess->t_idle = 0;
Willy Tarreau590a0512018-09-05 11:56:48 +02001555
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001556 /* OK done, the stream lives its own life now */
Willy Tarreaufa1d3572019-01-31 10:31:51 +01001557 if (h2_frt_has_too_many_cs(h2c))
Willy Tarreauf2101912018-07-19 10:11:38 +02001558 h2c->flags |= H2_CF_DEM_TOOMANY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001559 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001560 return h2s;
1561
1562 out_free_cs:
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001563 h2c->nb_cs--;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001564 cs_free(cs);
Olivier Houchard58d87f32019-05-29 16:44:17 +02001565 h2s->cs = NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001566 out_close:
Willy Tarreau71049cc2018-03-28 13:56:39 +02001567 h2s_destroy(h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001568 out:
Willy Tarreau45efc072018-10-03 18:27:52 +02001569 sess_log(sess);
Willy Tarreau7838a792019-08-12 18:42:03 +02001570 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreau45efc072018-10-03 18:27:52 +02001571 return NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001572}
1573
Willy Tarreau751f2d02018-10-05 09:35:00 +02001574/* allocates a new stream associated to conn_stream <cs> on the h2c connection
1575 * and returns it, or NULL in case of memory allocation error or if the highest
1576 * possible stream ID was reached.
1577 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01001578static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001579{
1580 struct h2s *h2s = NULL;
1581
Willy Tarreau7838a792019-08-12 18:42:03 +02001582 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1583
Willy Tarreau86949782019-01-31 10:42:05 +01001584 if (h2c->nb_streams >= h2c->streams_limit)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001585 goto out;
1586
Willy Tarreaua80dca82019-01-24 17:08:28 +01001587 if (h2_streams_left(h2c) < 1)
1588 goto out;
1589
Willy Tarreau751f2d02018-10-05 09:35:00 +02001590 /* Defer choosing the ID until we send the first message to create the stream */
1591 h2s = h2s_new(h2c, 0);
1592 if (!h2s)
1593 goto out;
1594
1595 h2s->cs = cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001596 h2s->sess = sess;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001597 cs->ctx = h2s;
1598 h2c->nb_cs++;
1599
Willy Tarreau751f2d02018-10-05 09:35:00 +02001600 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001601 if (likely(h2s))
1602 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
1603 else
1604 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn, h2s);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001605 return h2s;
1606}
1607
Willy Tarreaube5b7152017-09-25 16:25:39 +02001608/* try to send a settings frame on the connection. Returns > 0 on success, 0 if
1609 * it couldn't do anything. It may return an error in h2c. See RFC7540#11.3 for
1610 * the various settings codes.
1611 */
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001612static int h2c_send_settings(struct h2c *h2c)
Willy Tarreaube5b7152017-09-25 16:25:39 +02001613{
1614 struct buffer *res;
1615 char buf_data[100]; // enough for 15 settings
Willy Tarreau83061a82018-07-13 11:56:34 +02001616 struct buffer buf;
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001617 int mfs;
Willy Tarreau7838a792019-08-12 18:42:03 +02001618 int ret = 0;
1619
1620 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001621
1622 if (h2c_mux_busy(h2c, NULL)) {
1623 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001624 goto out;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001625 }
1626
Willy Tarreaube5b7152017-09-25 16:25:39 +02001627 chunk_init(&buf, buf_data, sizeof(buf_data));
1628 chunk_memcpy(&buf,
1629 "\x00\x00\x00" /* length : 0 for now */
1630 "\x04\x00" /* type : 4 (settings), flags : 0 */
1631 "\x00\x00\x00\x00", /* stream ID : 0 */
1632 9);
1633
Willy Tarreau0bbad6b2019-02-26 16:01:52 +01001634 if (h2c->flags & H2_CF_IS_BACK) {
1635 /* send settings_enable_push=0 */
1636 chunk_memcat(&buf, "\x00\x02\x00\x00\x00\x00", 6);
1637 }
1638
Amaury Denoyelle0ea2c4f2021-07-09 17:14:30 +02001639 /* rfc 8441 #3 SETTINGS_ENABLE_CONNECT_PROTOCOL=1,
1640 * sent automatically unless disabled in the global config */
1641 if (!(global.tune.options & GTUNE_DISABLE_H2_WEBSOCKET))
1642 chunk_memcat(&buf, "\x00\x08\x00\x00\x00\x01", 6);
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01001643
Willy Tarreaube5b7152017-09-25 16:25:39 +02001644 if (h2_settings_header_table_size != 4096) {
1645 char str[6] = "\x00\x01"; /* header_table_size */
1646
1647 write_n32(str + 2, h2_settings_header_table_size);
1648 chunk_memcat(&buf, str, 6);
1649 }
1650
1651 if (h2_settings_initial_window_size != 65535) {
1652 char str[6] = "\x00\x04"; /* initial_window_size */
1653
1654 write_n32(str + 2, h2_settings_initial_window_size);
1655 chunk_memcat(&buf, str, 6);
1656 }
1657
1658 if (h2_settings_max_concurrent_streams != 0) {
1659 char str[6] = "\x00\x03"; /* max_concurrent_streams */
1660
1661 /* Note: 0 means "unlimited" for haproxy's config but not for
1662 * the protocol, so never send this value!
1663 */
1664 write_n32(str + 2, h2_settings_max_concurrent_streams);
1665 chunk_memcat(&buf, str, 6);
1666 }
1667
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001668 mfs = h2_settings_max_frame_size;
1669 if (mfs > global.tune.bufsize)
1670 mfs = global.tune.bufsize;
1671
1672 if (!mfs)
1673 mfs = global.tune.bufsize;
1674
1675 if (mfs != 16384) {
Willy Tarreaube5b7152017-09-25 16:25:39 +02001676 char str[6] = "\x00\x05"; /* max_frame_size */
1677
1678 /* note: similarly we could also emit MAX_HEADER_LIST_SIZE to
1679 * match bufsize - rewrite size, but at the moment it seems
1680 * that clients don't take care of it.
1681 */
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001682 write_n32(str + 2, mfs);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001683 chunk_memcat(&buf, str, 6);
1684 }
1685
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001686 h2_set_frame_size(buf.area, buf.data - 9);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001687
1688 res = br_tail(h2c->mbuf);
1689 retry:
1690 if (!h2_get_buf(h2c, res)) {
1691 h2c->flags |= H2_CF_MUX_MALLOC;
1692 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001693 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001694 }
1695
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001696 ret = b_istput(res, ist2(buf.area, buf.data));
Willy Tarreaube5b7152017-09-25 16:25:39 +02001697 if (unlikely(ret <= 0)) {
1698 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001699 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1700 goto retry;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001701 h2c->flags |= H2_CF_MUX_MFULL;
1702 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001703 }
1704 else {
1705 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001706 ret = 0;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001707 }
1708 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001709 out:
1710 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001711 return ret;
1712}
1713
Willy Tarreau52eed752017-09-22 15:05:09 +02001714/* Try to receive a connection preface, then upon success try to send our
1715 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1716 * missing data. It may return an error in h2c.
1717 */
1718static int h2c_frt_recv_preface(struct h2c *h2c)
1719{
1720 int ret1;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001721 int ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001722
Willy Tarreau7838a792019-08-12 18:42:03 +02001723 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
1724
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001725 ret1 = b_isteq(&h2c->dbuf, 0, b_data(&h2c->dbuf), ist(H2_CONN_PREFACE));
Willy Tarreau52eed752017-09-22 15:05:09 +02001726
1727 if (unlikely(ret1 <= 0)) {
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02001728 if (!ret1)
1729 h2c->flags |= H2_CF_DEM_SHORT_READ;
Amaury Denoyellea8879232020-10-27 17:16:03 +01001730 if (ret1 < 0 || conn_xprt_read0_pending(h2c->conn)) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01001731 TRACE_ERROR("I/O error or short read", H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02001732 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc23d6d12021-06-17 08:08:48 +02001733 if (b_data(&h2c->dbuf) ||
1734 !(((const struct session *)h2c->conn->owner)->fe->options & PR_O_IGNORE_PRB))
1735 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Amaury Denoyellea8879232020-10-27 17:16:03 +01001736 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001737 ret2 = 0;
1738 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02001739 }
1740
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001741 ret2 = h2c_send_settings(h2c);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001742 if (ret2 > 0)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001743 b_del(&h2c->dbuf, ret1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001744 out:
1745 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001746 return ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001747}
1748
Willy Tarreau01b44822018-10-03 14:26:37 +02001749/* Try to send a connection preface, then upon success try to send our
1750 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1751 * missing data. It may return an error in h2c.
1752 */
1753static int h2c_bck_send_preface(struct h2c *h2c)
1754{
1755 struct buffer *res;
Willy Tarreau7838a792019-08-12 18:42:03 +02001756 int ret = 0;
1757
1758 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02001759
1760 if (h2c_mux_busy(h2c, NULL)) {
1761 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001762 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001763 }
1764
Willy Tarreaubcc45952019-05-26 10:05:50 +02001765 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001766 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001767 if (!h2_get_buf(h2c, res)) {
Willy Tarreau01b44822018-10-03 14:26:37 +02001768 h2c->flags |= H2_CF_MUX_MALLOC;
1769 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001770 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001771 }
1772
1773 if (!b_data(res)) {
1774 /* preface not yet sent */
Willy Tarreau9c218e72019-05-26 10:08:28 +02001775 ret = b_istput(res, ist(H2_CONN_PREFACE));
1776 if (unlikely(ret <= 0)) {
1777 if (!ret) {
1778 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1779 goto retry;
1780 h2c->flags |= H2_CF_MUX_MFULL;
1781 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001782 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001783 }
1784 else {
1785 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001786 ret = 0;
1787 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001788 }
1789 }
Willy Tarreau01b44822018-10-03 14:26:37 +02001790 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001791 ret = h2c_send_settings(h2c);
1792 out:
1793 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
1794 return ret;
Willy Tarreau01b44822018-10-03 14:26:37 +02001795}
1796
Willy Tarreau081d4722017-05-16 21:51:05 +02001797/* try to send a GOAWAY frame on the connection to report an error or a graceful
1798 * shutdown, with h2c->errcode as the error code. Returns > 0 on success or zero
1799 * if nothing was done. It uses h2c->last_sid as the advertised ID, or copies it
1800 * from h2c->max_id if it's not set yet (<0). In case of lack of room to write
1801 * the message, it subscribes the requester (either <h2s> or <h2c>) to future
1802 * notifications. It sets H2_CF_GOAWAY_SENT on success, and H2_CF_GOAWAY_FAILED
1803 * on unrecoverable failure. It will not attempt to send one again in this last
1804 * case so that it is safe to use h2c_error() to report such errors.
1805 */
1806static int h2c_send_goaway_error(struct h2c *h2c, struct h2s *h2s)
1807{
1808 struct buffer *res;
1809 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02001810 int ret = 0;
Willy Tarreau081d4722017-05-16 21:51:05 +02001811
Willy Tarreau7838a792019-08-12 18:42:03 +02001812 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
1813
1814 if (h2c->flags & H2_CF_GOAWAY_FAILED) {
1815 ret = 1; // claim that it worked
1816 goto out;
1817 }
Willy Tarreau081d4722017-05-16 21:51:05 +02001818
1819 if (h2c_mux_busy(h2c, h2s)) {
1820 if (h2s)
1821 h2s->flags |= H2_SF_BLK_MBUSY;
1822 else
1823 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001824 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001825 }
1826
Willy Tarreau9c218e72019-05-26 10:08:28 +02001827 /* len: 8, type: 7, flags: none, sid: 0 */
1828 memcpy(str, "\x00\x00\x08\x07\x00\x00\x00\x00\x00", 9);
1829
1830 if (h2c->last_sid < 0)
1831 h2c->last_sid = h2c->max_id;
1832
1833 write_n32(str + 9, h2c->last_sid);
1834 write_n32(str + 13, h2c->errcode);
1835
Willy Tarreaubcc45952019-05-26 10:05:50 +02001836 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001837 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001838 if (!h2_get_buf(h2c, res)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02001839 h2c->flags |= H2_CF_MUX_MALLOC;
1840 if (h2s)
1841 h2s->flags |= H2_SF_BLK_MROOM;
1842 else
1843 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001844 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001845 }
1846
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001847 ret = b_istput(res, ist2(str, 17));
Willy Tarreau081d4722017-05-16 21:51:05 +02001848 if (unlikely(ret <= 0)) {
1849 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001850 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1851 goto retry;
Willy Tarreau081d4722017-05-16 21:51:05 +02001852 h2c->flags |= H2_CF_MUX_MFULL;
1853 if (h2s)
1854 h2s->flags |= H2_SF_BLK_MROOM;
1855 else
1856 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001857 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001858 }
1859 else {
1860 /* we cannot report this error using GOAWAY, so we mark
1861 * it and claim a success.
1862 */
1863 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1864 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau7838a792019-08-12 18:42:03 +02001865 ret = 1;
1866 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001867 }
1868 }
1869 h2c->flags |= H2_CF_GOAWAY_SENT;
Willy Tarreauf965b2a2020-12-01 10:47:18 +01001870
1871 /* some codes are not for real errors, just attempts to close cleanly */
1872 switch (h2c->errcode) {
1873 case H2_ERR_NO_ERROR:
1874 case H2_ERR_ENHANCE_YOUR_CALM:
1875 case H2_ERR_REFUSED_STREAM:
1876 case H2_ERR_CANCEL:
1877 break;
1878 default:
Willy Tarreau4781b152021-04-06 13:53:36 +02001879 HA_ATOMIC_INC(&h2c->px_counters->goaway_resp);
Willy Tarreauf965b2a2020-12-01 10:47:18 +01001880 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001881 out:
1882 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
Willy Tarreau081d4722017-05-16 21:51:05 +02001883 return ret;
1884}
1885
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001886/* Try to send an RST_STREAM frame on the connection for the indicated stream
1887 * during mux operations. This stream must be valid and cannot be closed
1888 * already. h2s->id will be used for the stream ID and h2s->errcode will be
1889 * used for the error code. h2s->st will be update to H2_SS_CLOSED if it was
1890 * not yet.
1891 *
1892 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1893 * to write the message, it subscribes the stream to future notifications.
1894 */
1895static int h2s_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1896{
1897 struct buffer *res;
1898 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001899 int ret = 0;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001900
Willy Tarreau7838a792019-08-12 18:42:03 +02001901 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
1902
1903 if (!h2s || h2s->st == H2_SS_CLOSED) {
1904 ret = 1;
1905 goto out;
1906 }
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001907
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001908 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1909 * RST_STREAM in response to a RST_STREAM frame.
1910 */
Willy Tarreau231f6162019-08-06 10:01:40 +02001911 if (h2c->dsi == h2s->id && h2c->dft == H2_FT_RST_STREAM) {
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001912 ret = 1;
1913 goto ignore;
1914 }
1915
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001916 if (h2c_mux_busy(h2c, h2s)) {
1917 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001918 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001919 }
1920
Willy Tarreau9c218e72019-05-26 10:08:28 +02001921 /* len: 4, type: 3, flags: none */
1922 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1923 write_n32(str + 5, h2s->id);
1924 write_n32(str + 9, h2s->errcode);
1925
Willy Tarreaubcc45952019-05-26 10:05:50 +02001926 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001927 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001928 if (!h2_get_buf(h2c, res)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001929 h2c->flags |= H2_CF_MUX_MALLOC;
1930 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001931 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001932 }
1933
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001934 ret = b_istput(res, ist2(str, 13));
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001935 if (unlikely(ret <= 0)) {
1936 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001937 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1938 goto retry;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001939 h2c->flags |= H2_CF_MUX_MFULL;
1940 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001941 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001942 }
1943 else {
1944 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001945 ret = 0;
1946 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001947 }
1948 }
1949
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001950 ignore:
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001951 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001952 h2s_close(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001953 out:
1954 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001955 return ret;
1956}
1957
1958/* Try to send an RST_STREAM frame on the connection for the stream being
1959 * demuxed using h2c->dsi for the stream ID. It will use h2s->errcode as the
Willy Tarreaue6888ff2018-12-23 18:26:26 +01001960 * error code, even if the stream is one of the dummy ones, and will update
1961 * h2s->st to H2_SS_CLOSED if it was not yet.
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001962 *
1963 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1964 * to write the message, it blocks the demuxer and subscribes it to future
Joseph Herlantd77575d2018-11-25 10:54:45 -08001965 * notifications. It's worth mentioning that an RST may even be sent for a
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001966 * closed stream.
Willy Tarreau27a84c92017-10-17 08:10:17 +02001967 */
1968static int h2c_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1969{
1970 struct buffer *res;
1971 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001972 int ret = 0;
1973
1974 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02001975
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001976 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1977 * RST_STREAM in response to a RST_STREAM frame.
1978 */
1979 if (h2c->dft == H2_FT_RST_STREAM) {
1980 ret = 1;
1981 goto ignore;
1982 }
1983
Willy Tarreau27a84c92017-10-17 08:10:17 +02001984 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001985 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001986 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001987 }
1988
Willy Tarreau9c218e72019-05-26 10:08:28 +02001989 /* len: 4, type: 3, flags: none */
1990 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1991
1992 write_n32(str + 5, h2c->dsi);
1993 write_n32(str + 9, h2s->errcode);
1994
Willy Tarreaubcc45952019-05-26 10:05:50 +02001995 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001996 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001997 if (!h2_get_buf(h2c, res)) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02001998 h2c->flags |= H2_CF_MUX_MALLOC;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001999 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002000 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002001 }
2002
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002003 ret = b_istput(res, ist2(str, 13));
Willy Tarreau27a84c92017-10-17 08:10:17 +02002004 if (unlikely(ret <= 0)) {
2005 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002006 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2007 goto retry;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002008 h2c->flags |= H2_CF_MUX_MFULL;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002009 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002010 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002011 }
2012 else {
2013 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002014 ret = 0;
2015 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002016 }
2017 }
2018
Willy Tarreau8adae7c2018-03-22 17:37:05 +01002019 ignore:
Willy Tarreauab0e1da2018-10-05 10:16:37 +02002020 if (h2s->id) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02002021 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01002022 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002023 }
2024
Willy Tarreau7838a792019-08-12 18:42:03 +02002025 out:
Willy Tarreau4781b152021-04-06 13:53:36 +02002026 HA_ATOMIC_INC(&h2c->px_counters->rst_stream_resp);
Willy Tarreau7838a792019-08-12 18:42:03 +02002027 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02002028 return ret;
2029}
2030
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002031/* try to send an empty DATA frame with the ES flag set to notify about the
2032 * end of stream and match a shutdown(write). If an ES was already sent as
2033 * indicated by HLOC/ERROR/RESET/CLOSED states, nothing is done. Returns > 0
2034 * on success or zero if nothing was done. In case of lack of room to write the
2035 * message, it subscribes the requesting stream to future notifications.
2036 */
2037static int h2_send_empty_data_es(struct h2s *h2s)
2038{
2039 struct h2c *h2c = h2s->h2c;
2040 struct buffer *res;
2041 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002042 int ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002043
Willy Tarreau7838a792019-08-12 18:42:03 +02002044 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
2045
2046 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED) {
2047 ret = 1;
2048 goto out;
2049 }
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002050
2051 if (h2c_mux_busy(h2c, h2s)) {
2052 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002053 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002054 }
2055
Willy Tarreau9c218e72019-05-26 10:08:28 +02002056 /* len: 0x000000, type: 0(DATA), flags: ES=1 */
2057 memcpy(str, "\x00\x00\x00\x00\x01", 5);
2058 write_n32(str + 5, h2s->id);
2059
Willy Tarreaubcc45952019-05-26 10:05:50 +02002060 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002061 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002062 if (!h2_get_buf(h2c, res)) {
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002063 h2c->flags |= H2_CF_MUX_MALLOC;
2064 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002065 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002066 }
2067
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002068 ret = b_istput(res, ist2(str, 9));
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002069 if (likely(ret > 0)) {
2070 h2s->flags |= H2_SF_ES_SENT;
2071 }
2072 else if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002073 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2074 goto retry;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002075 h2c->flags |= H2_CF_MUX_MFULL;
2076 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002077 }
2078 else {
2079 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002080 ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002081 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002082 out:
2083 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002084 return ret;
2085}
2086
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05002087/* wake a specific stream and assign its conn_stream some CS_FL_* flags among
Willy Tarreau99ad1b32019-05-14 11:46:28 +02002088 * CS_FL_ERR_PENDING and CS_FL_ERROR if needed. The stream's state
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002089 * is automatically updated accordingly. If the stream is orphaned, it is
2090 * destroyed.
Christopher Fauletf02ca002019-03-07 16:21:34 +01002091 */
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002092static void h2s_wake_one_stream(struct h2s *h2s)
Christopher Fauletf02ca002019-03-07 16:21:34 +01002093{
Willy Tarreau7838a792019-08-12 18:42:03 +02002094 struct h2c *h2c = h2s->h2c;
2095
2096 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn, h2s);
2097
Christopher Fauletf02ca002019-03-07 16:21:34 +01002098 if (!h2s->cs) {
2099 /* this stream was already orphaned */
2100 h2s_destroy(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002101 TRACE_DEVEL("leaving with no h2s", H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002102 return;
2103 }
2104
Christopher Fauletaade4ed2020-10-08 15:38:41 +02002105 if (h2c_read0_pending(h2s->h2c)) {
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002106 if (h2s->st == H2_SS_OPEN)
2107 h2s->st = H2_SS_HREM;
2108 else if (h2s->st == H2_SS_HLOC)
2109 h2s_close(h2s);
2110 }
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002111
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002112 if ((h2s->h2c->st0 >= H2_CS_ERROR || h2s->h2c->conn->flags & CO_FL_ERROR) ||
2113 (h2s->h2c->last_sid > 0 && (!h2s->id || h2s->id > h2s->h2c->last_sid))) {
2114 h2s->cs->flags |= CS_FL_ERR_PENDING;
2115 if (h2s->cs->flags & CS_FL_EOS)
2116 h2s->cs->flags |= CS_FL_ERROR;
Willy Tarreau23482912019-05-07 15:23:14 +02002117
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002118 if (h2s->st < H2_SS_ERROR)
2119 h2s->st = H2_SS_ERROR;
2120 }
Christopher Fauletf02ca002019-03-07 16:21:34 +01002121
2122 h2s_alert(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002123 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002124}
2125
2126/* wake the streams attached to the connection, whose id is greater than <last>
2127 * or unassigned.
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002128 */
Willy Tarreau23482912019-05-07 15:23:14 +02002129static void h2_wake_some_streams(struct h2c *h2c, int last)
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002130{
2131 struct eb32_node *node;
2132 struct h2s *h2s;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002133
Willy Tarreau7838a792019-08-12 18:42:03 +02002134 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn);
2135
Christopher Fauletf02ca002019-03-07 16:21:34 +01002136 /* Wake all streams with ID > last */
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002137 node = eb32_lookup_ge(&h2c->streams_by_id, last + 1);
2138 while (node) {
2139 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002140 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002141 h2s_wake_one_stream(h2s);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002142 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01002143
Christopher Fauletf02ca002019-03-07 16:21:34 +01002144 /* Wake all streams with unassigned ID (ID == 0) */
2145 node = eb32_lookup(&h2c->streams_by_id, 0);
2146 while (node) {
2147 h2s = container_of(node, struct h2s, by_id);
2148 if (h2s->id > 0)
2149 break;
2150 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002151 h2s_wake_one_stream(h2s);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002152 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002153
2154 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002155}
2156
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002157/* Wake up all blocked streams whose window size has become positive after the
2158 * mux's initial window was adjusted. This should be done after having processed
2159 * SETTINGS frames which have updated the mux's initial window size.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002160 */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002161static void h2c_unblock_sfctl(struct h2c *h2c)
Willy Tarreau3421aba2017-07-27 15:41:03 +02002162{
2163 struct h2s *h2s;
2164 struct eb32_node *node;
2165
Willy Tarreau7838a792019-08-12 18:42:03 +02002166 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
2167
Willy Tarreau3421aba2017-07-27 15:41:03 +02002168 node = eb32_first(&h2c->streams_by_id);
2169 while (node) {
2170 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002171 if (h2s->flags & H2_SF_BLK_SFCTL && h2s_mws(h2s) > 0) {
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002172 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002173 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002174 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2175 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreau2b718102021-04-21 07:32:39 +02002176 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002177 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002178 node = eb32_next(node);
2179 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002180
2181 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002182}
2183
2184/* processes a SETTINGS frame whose payload is <payload> for <plen> bytes, and
2185 * ACKs it if needed. Returns > 0 on success or zero on missing data. It may
Willy Tarreaub860c732019-01-30 15:39:55 +01002186 * return an error in h2c. The caller must have already verified frame length
2187 * and stream ID validity. Described in RFC7540#6.5.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002188 */
2189static int h2c_handle_settings(struct h2c *h2c)
2190{
2191 unsigned int offset;
2192 int error;
2193
Willy Tarreau7838a792019-08-12 18:42:03 +02002194 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
2195
Willy Tarreau3421aba2017-07-27 15:41:03 +02002196 if (h2c->dff & H2_F_SETTINGS_ACK) {
2197 if (h2c->dfl) {
2198 error = H2_ERR_FRAME_SIZE_ERROR;
2199 goto fail;
2200 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002201 goto done;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002202 }
2203
Willy Tarreau3421aba2017-07-27 15:41:03 +02002204 /* process full frame only */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002205 if (b_data(&h2c->dbuf) < h2c->dfl) {
2206 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002207 goto out0;
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002208 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002209
2210 /* parse the frame */
2211 for (offset = 0; offset < h2c->dfl; offset += 6) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002212 uint16_t type = h2_get_n16(&h2c->dbuf, offset);
2213 int32_t arg = h2_get_n32(&h2c->dbuf, offset + 2);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002214
2215 switch (type) {
2216 case H2_SETTINGS_INITIAL_WINDOW_SIZE:
2217 /* we need to update all existing streams with the
2218 * difference from the previous iws.
2219 */
2220 if (arg < 0) { // RFC7540#6.5.2
2221 error = H2_ERR_FLOW_CONTROL_ERROR;
2222 goto fail;
2223 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002224 h2c->miw = arg;
2225 break;
2226 case H2_SETTINGS_MAX_FRAME_SIZE:
2227 if (arg < 16384 || arg > 16777215) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002228 TRACE_ERROR("MAX_FRAME_SIZE out of range", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002229 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002230 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002231 goto fail;
2232 }
2233 h2c->mfs = arg;
2234 break;
Willy Tarreau8a4dca02022-01-13 16:00:12 +01002235 case H2_SETTINGS_HEADER_TABLE_SIZE:
2236 h2c->flags |= H2_CF_SHTS_UPDATED;
2237 break;
Willy Tarreau1b38b462017-12-03 19:02:28 +01002238 case H2_SETTINGS_ENABLE_PUSH:
2239 if (arg < 0 || arg > 1) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002240 TRACE_ERROR("ENABLE_PUSH out of range", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002241 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002242 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002243 goto fail;
2244 }
2245 break;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01002246 case H2_SETTINGS_MAX_CONCURRENT_STREAMS:
2247 if (h2c->flags & H2_CF_IS_BACK) {
2248 /* the limit is only for the backend; for the frontend it is our limit */
2249 if ((unsigned int)arg > h2_settings_max_concurrent_streams)
2250 arg = h2_settings_max_concurrent_streams;
2251 h2c->streams_limit = arg;
2252 }
2253 break;
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01002254 case H2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
Amaury Denoyelle68993a12021-10-18 09:43:29 +02002255 if (arg == 1)
2256 h2c->flags |= H2_CF_RCVD_RFC8441;
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01002257 break;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002258 }
2259 }
2260
2261 /* need to ACK this frame now */
2262 h2c->st0 = H2_CS_FRAME_A;
Willy Tarreau7838a792019-08-12 18:42:03 +02002263 done:
2264 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002265 return 1;
2266 fail:
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002267 if (!(h2c->flags & H2_CF_IS_BACK))
2268 sess_log(h2c->conn->owner);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002269 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002270 out0:
2271 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 +02002272 return 0;
2273}
2274
2275/* try to send an ACK for a settings frame on the connection. Returns > 0 on
2276 * success or one of the h2_status values.
2277 */
2278static int h2c_ack_settings(struct h2c *h2c)
2279{
2280 struct buffer *res;
2281 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002282 int ret = 0;
2283
2284 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002285
2286 if (h2c_mux_busy(h2c, NULL)) {
2287 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002288 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002289 }
2290
Willy Tarreau9c218e72019-05-26 10:08:28 +02002291 memcpy(str,
2292 "\x00\x00\x00" /* length : 0 (no data) */
2293 "\x04" "\x01" /* type : 4, flags : ACK */
2294 "\x00\x00\x00\x00" /* stream ID */, 9);
2295
Willy Tarreaubcc45952019-05-26 10:05:50 +02002296 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002297 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002298 if (!h2_get_buf(h2c, res)) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02002299 h2c->flags |= H2_CF_MUX_MALLOC;
2300 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002301 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002302 }
2303
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002304 ret = b_istput(res, ist2(str, 9));
Willy Tarreau3421aba2017-07-27 15:41:03 +02002305 if (unlikely(ret <= 0)) {
2306 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002307 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2308 goto retry;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002309 h2c->flags |= H2_CF_MUX_MFULL;
2310 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002311 }
2312 else {
2313 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002314 ret = 0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002315 }
2316 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002317 out:
2318 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002319 return ret;
2320}
2321
Willy Tarreaucf68c782017-10-10 17:11:41 +02002322/* processes a PING frame and schedules an ACK if needed. The caller must pass
2323 * the pointer to the payload in <payload>. Returns > 0 on success or zero on
Willy Tarreaub860c732019-01-30 15:39:55 +01002324 * missing data. The caller must have already verified frame length
2325 * and stream ID validity.
Willy Tarreaucf68c782017-10-10 17:11:41 +02002326 */
2327static int h2c_handle_ping(struct h2c *h2c)
2328{
Willy Tarreaucf68c782017-10-10 17:11:41 +02002329 /* schedule a response */
Willy Tarreau68ed6412017-12-03 18:15:56 +01002330 if (!(h2c->dff & H2_F_PING_ACK))
Willy Tarreaucf68c782017-10-10 17:11:41 +02002331 h2c->st0 = H2_CS_FRAME_A;
2332 return 1;
2333}
2334
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002335/* Try to send a window update for stream id <sid> and value <increment>.
2336 * Returns > 0 on success or zero on missing room or failure. It may return an
2337 * error in h2c.
2338 */
2339static int h2c_send_window_update(struct h2c *h2c, int sid, uint32_t increment)
2340{
2341 struct buffer *res;
2342 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002343 int ret = 0;
2344
2345 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002346
2347 if (h2c_mux_busy(h2c, NULL)) {
2348 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002349 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002350 }
2351
Willy Tarreau9c218e72019-05-26 10:08:28 +02002352 /* length: 4, type: 8, flags: none */
2353 memcpy(str, "\x00\x00\x04\x08\x00", 5);
2354 write_n32(str + 5, sid);
2355 write_n32(str + 9, increment);
2356
Willy Tarreaubcc45952019-05-26 10:05:50 +02002357 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002358 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002359 if (!h2_get_buf(h2c, res)) {
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002360 h2c->flags |= H2_CF_MUX_MALLOC;
2361 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002362 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002363 }
2364
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002365 ret = b_istput(res, ist2(str, 13));
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002366 if (unlikely(ret <= 0)) {
2367 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002368 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2369 goto retry;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002370 h2c->flags |= H2_CF_MUX_MFULL;
2371 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002372 }
2373 else {
2374 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002375 ret = 0;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002376 }
2377 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002378 out:
2379 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002380 return ret;
2381}
2382
2383/* try to send pending window update for the connection. It's safe to call it
2384 * with no pending updates. Returns > 0 on success or zero on missing room or
2385 * failure. It may return an error in h2c.
2386 */
2387static int h2c_send_conn_wu(struct h2c *h2c)
2388{
2389 int ret = 1;
2390
Willy Tarreau7838a792019-08-12 18:42:03 +02002391 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2392
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002393 if (h2c->rcvd_c <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002394 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002395
Willy Tarreau97aaa672018-12-23 09:49:04 +01002396 if (!(h2c->flags & H2_CF_WINDOW_OPENED)) {
2397 /* increase the advertised connection window to 2G on
2398 * first update.
2399 */
2400 h2c->flags |= H2_CF_WINDOW_OPENED;
2401 h2c->rcvd_c += H2_INITIAL_WINDOW_INCREMENT;
2402 }
2403
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002404 /* send WU for the connection */
2405 ret = h2c_send_window_update(h2c, 0, h2c->rcvd_c);
2406 if (ret > 0)
2407 h2c->rcvd_c = 0;
2408
Willy Tarreau7838a792019-08-12 18:42:03 +02002409 out:
2410 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002411 return ret;
2412}
2413
2414/* try to send pending window update for the current dmux stream. It's safe to
2415 * call it with no pending updates. Returns > 0 on success or zero on missing
2416 * room or failure. It may return an error in h2c.
2417 */
2418static int h2c_send_strm_wu(struct h2c *h2c)
2419{
2420 int ret = 1;
2421
Willy Tarreau7838a792019-08-12 18:42:03 +02002422 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2423
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002424 if (h2c->rcvd_s <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002425 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002426
2427 /* send WU for the stream */
2428 ret = h2c_send_window_update(h2c, h2c->dsi, h2c->rcvd_s);
2429 if (ret > 0)
2430 h2c->rcvd_s = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002431 out:
2432 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002433 return ret;
2434}
2435
Willy Tarreaucf68c782017-10-10 17:11:41 +02002436/* try to send an ACK for a ping frame on the connection. Returns > 0 on
2437 * success, 0 on missing data or one of the h2_status values.
2438 */
2439static int h2c_ack_ping(struct h2c *h2c)
2440{
2441 struct buffer *res;
2442 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02002443 int ret = 0;
2444
2445 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002446
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002447 if (b_data(&h2c->dbuf) < 8)
Willy Tarreau7838a792019-08-12 18:42:03 +02002448 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002449
2450 if (h2c_mux_busy(h2c, NULL)) {
2451 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002452 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002453 }
2454
Willy Tarreaucf68c782017-10-10 17:11:41 +02002455 memcpy(str,
2456 "\x00\x00\x08" /* length : 8 (same payload) */
2457 "\x06" "\x01" /* type : 6, flags : ACK */
2458 "\x00\x00\x00\x00" /* stream ID */, 9);
2459
2460 /* copy the original payload */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002461 h2_get_buf_bytes(str + 9, 8, &h2c->dbuf, 0);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002462
Willy Tarreau9c218e72019-05-26 10:08:28 +02002463 res = br_tail(h2c->mbuf);
2464 retry:
2465 if (!h2_get_buf(h2c, res)) {
2466 h2c->flags |= H2_CF_MUX_MALLOC;
2467 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002468 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02002469 }
2470
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002471 ret = b_istput(res, ist2(str, 17));
Willy Tarreaucf68c782017-10-10 17:11:41 +02002472 if (unlikely(ret <= 0)) {
2473 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002474 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2475 goto retry;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002476 h2c->flags |= H2_CF_MUX_MFULL;
2477 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002478 }
2479 else {
2480 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002481 ret = 0;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002482 }
2483 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002484 out:
2485 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002486 return ret;
2487}
2488
Willy Tarreau26f95952017-07-27 17:18:30 +02002489/* processes a WINDOW_UPDATE frame whose payload is <payload> for <plen> bytes.
2490 * Returns > 0 on success or zero on missing data. It may return an error in
Willy Tarreaub860c732019-01-30 15:39:55 +01002491 * h2c or h2s. The caller must have already verified frame length and stream ID
2492 * validity. Described in RFC7540#6.9.
Willy Tarreau26f95952017-07-27 17:18:30 +02002493 */
2494static int h2c_handle_window_update(struct h2c *h2c, struct h2s *h2s)
2495{
2496 int32_t inc;
2497 int error;
2498
Willy Tarreau7838a792019-08-12 18:42:03 +02002499 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
2500
Willy Tarreau26f95952017-07-27 17:18:30 +02002501 /* process full frame only */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002502 if (b_data(&h2c->dbuf) < h2c->dfl) {
2503 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002504 goto out0;
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002505 }
Willy Tarreau26f95952017-07-27 17:18:30 +02002506
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002507 inc = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau26f95952017-07-27 17:18:30 +02002508
2509 if (h2c->dsi != 0) {
2510 /* stream window update */
Willy Tarreau26f95952017-07-27 17:18:30 +02002511
2512 /* it's not an error to receive WU on a closed stream */
2513 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau7838a792019-08-12 18:42:03 +02002514 goto done;
Willy Tarreau26f95952017-07-27 17:18:30 +02002515
2516 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002517 TRACE_ERROR("stream WINDOW_UPDATE inc=0", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn, h2s);
Willy Tarreau26f95952017-07-27 17:18:30 +02002518 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002519 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002520 goto strm_err;
2521 }
2522
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002523 if (h2s_mws(h2s) >= 0 && h2s_mws(h2s) + inc < 0) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002524 TRACE_ERROR("stream WINDOW_UPDATE inc<0", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn, h2s);
Willy Tarreau26f95952017-07-27 17:18:30 +02002525 error = H2_ERR_FLOW_CONTROL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002526 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002527 goto strm_err;
2528 }
2529
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002530 h2s->sws += inc;
2531 if (h2s_mws(h2s) > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002532 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002533 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002534 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2535 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreau2b718102021-04-21 07:32:39 +02002536 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreau26f95952017-07-27 17:18:30 +02002537 }
2538 }
2539 else {
2540 /* connection window update */
2541 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002542 TRACE_ERROR("conn WINDOW_UPDATE inc=0", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002543 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002544 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002545 goto conn_err;
2546 }
2547
2548 if (h2c->mws >= 0 && h2c->mws + inc < 0) {
2549 error = H2_ERR_FLOW_CONTROL_ERROR;
2550 goto conn_err;
2551 }
2552
2553 h2c->mws += inc;
2554 }
2555
Willy Tarreau7838a792019-08-12 18:42:03 +02002556 done:
2557 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002558 return 1;
2559
2560 conn_err:
2561 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002562 out0:
2563 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 +02002564 return 0;
2565
2566 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002567 h2s_error(h2s, error);
2568 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002569 TRACE_DEVEL("leaving on stream error", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002570 return 0;
2571}
2572
Willy Tarreaue96b0922017-10-30 00:28:29 +01002573/* processes a GOAWAY frame, and signals all streams whose ID is greater than
Willy Tarreaub860c732019-01-30 15:39:55 +01002574 * the last ID. Returns > 0 on success or zero on missing data. The caller must
2575 * have already verified frame length and stream ID validity. Described in
2576 * RFC7540#6.8.
Willy Tarreaue96b0922017-10-30 00:28:29 +01002577 */
2578static int h2c_handle_goaway(struct h2c *h2c)
2579{
Willy Tarreaue96b0922017-10-30 00:28:29 +01002580 int last;
2581
Willy Tarreau7838a792019-08-12 18:42:03 +02002582 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002583 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002584 if (b_data(&h2c->dbuf) < h2c->dfl) {
2585 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002586 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002587 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002588 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01002589
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002590 last = h2_get_n32(&h2c->dbuf, 0);
2591 h2c->errcode = h2_get_n32(&h2c->dbuf, 4);
Willy Tarreau11cc2d62017-12-03 10:27:47 +01002592 if (h2c->last_sid < 0)
2593 h2c->last_sid = last;
Willy Tarreau23482912019-05-07 15:23:14 +02002594 h2_wake_some_streams(h2c, last);
Willy Tarreau7838a792019-08-12 18:42:03 +02002595 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002596 return 1;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002597}
2598
Willy Tarreau92153fc2017-12-03 19:46:19 +01002599/* processes a PRIORITY frame, and either skips it or rejects if it is
Willy Tarreaub860c732019-01-30 15:39:55 +01002600 * invalid. Returns > 0 on success or zero on missing data. It may return an
2601 * error in h2c. The caller must have already verified frame length and stream
2602 * ID validity. Described in RFC7540#6.3.
Willy Tarreau92153fc2017-12-03 19:46:19 +01002603 */
2604static int h2c_handle_priority(struct h2c *h2c)
2605{
Willy Tarreau7838a792019-08-12 18:42:03 +02002606 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
2607
Willy Tarreau92153fc2017-12-03 19:46:19 +01002608 /* process full frame only */
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002609 if (b_data(&h2c->dbuf) < h2c->dfl) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002610 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002611 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002612 return 0;
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002613 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01002614
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002615 if (h2_get_n32(&h2c->dbuf, 0) == h2c->dsi) {
Willy Tarreau92153fc2017-12-03 19:46:19 +01002616 /* 7540#5.3 : can't depend on itself */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002617 TRACE_ERROR("PRIORITY depends on itself", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002618 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02002619 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002620 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002621 return 0;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002622 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002623 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002624 return 1;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002625}
2626
Willy Tarreaucd234e92017-08-18 10:59:39 +02002627/* processes an RST_STREAM frame, and sets the 32-bit error code on the stream.
Willy Tarreaub860c732019-01-30 15:39:55 +01002628 * Returns > 0 on success or zero on missing data. The caller must have already
2629 * verified frame length and stream ID validity. Described in RFC7540#6.4.
Willy Tarreaucd234e92017-08-18 10:59:39 +02002630 */
2631static int h2c_handle_rst_stream(struct h2c *h2c, struct h2s *h2s)
2632{
Willy Tarreau7838a792019-08-12 18:42:03 +02002633 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
2634
Willy Tarreaucd234e92017-08-18 10:59:39 +02002635 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002636 if (b_data(&h2c->dbuf) < h2c->dfl) {
2637 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002638 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002639 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002640 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002641
2642 /* late RST, already handled */
Willy Tarreau7838a792019-08-12 18:42:03 +02002643 if (h2s->st == H2_SS_CLOSED) {
2644 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 +02002645 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002646 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002647
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002648 h2s->errcode = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau00dd0782018-03-01 16:31:34 +01002649 h2s_close(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002650
2651 if (h2s->cs) {
Willy Tarreauec988c72018-12-19 18:00:29 +01002652 cs_set_error(h2s->cs);
Willy Tarreauf830f012018-12-19 17:44:55 +01002653 h2s_alert(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002654 }
2655
2656 h2s->flags |= H2_SF_RST_RCVD;
Willy Tarreau7838a792019-08-12 18:42:03 +02002657 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002658 return 1;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002659}
2660
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002661/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2662 * It may return an error in h2c or h2s. The caller must consider that the
2663 * return value is the new h2s in case one was allocated (most common case).
2664 * Described in RFC7540#6.2. Most of the
Willy Tarreau13278b42017-10-13 19:23:14 +02002665 * errors here are reported as connection errors since it's impossible to
2666 * recover from such errors after the compression context has been altered.
2667 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002668static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau13278b42017-10-13 19:23:14 +02002669{
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002670 struct buffer rxbuf = BUF_NULL;
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002671 unsigned long long body_len = 0;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002672 uint32_t flags = 0;
Willy Tarreau13278b42017-10-13 19:23:14 +02002673 int error;
2674
Willy Tarreau7838a792019-08-12 18:42:03 +02002675 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2676
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002677 if (!b_size(&h2c->dbuf)) {
2678 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002679 goto out; // empty buffer
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002680 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002681
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002682 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2683 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002684 goto out; // incomplete frame
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002685 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002686
2687 /* now either the frame is complete or the buffer is complete */
2688 if (h2s->st != H2_SS_IDLE) {
Willy Tarreau88d138e2019-01-02 19:38:14 +01002689 /* The stream exists/existed, this must be a trailers frame */
2690 if (h2s->st != H2_SS_CLOSED) {
Amaury Denoyelle74162742020-12-11 17:53:05 +01002691 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &body_len, NULL);
Willy Tarreauaab1a602019-05-06 11:12:18 +02002692 /* unrecoverable error ? */
2693 if (h2c->st0 >= H2_CS_ERROR)
2694 goto out;
2695
Christopher Faulet0de3f552021-10-08 08:56:00 +02002696 if (error == 0) {
2697 /* Demux not blocked because of the stream, it is an incomplete frame */
2698 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2699 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002700 goto out; // missing data
Christopher Faulet0de3f552021-10-08 08:56:00 +02002701 }
Willy Tarreauaab1a602019-05-06 11:12:18 +02002702
2703 if (error < 0) {
2704 /* Failed to decode this frame (e.g. too large request)
2705 * but the HPACK decompressor is still synchronized.
2706 */
2707 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
2708 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau88d138e2019-01-02 19:38:14 +01002709 goto out;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002710 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01002711 goto done;
2712 }
Willy Tarreau1f035502019-01-30 11:44:07 +01002713 /* the connection was already killed by an RST, let's consume
2714 * the data and send another RST.
2715 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01002716 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Willy Tarreau1f035502019-01-30 11:44:07 +01002717 h2s = (struct h2s*)h2_error_stream;
2718 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002719 }
2720 else if (h2c->dsi <= h2c->max_id || !(h2c->dsi & 1)) {
2721 /* RFC7540#5.1.1 stream id > prev ones, and must be odd here */
2722 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002723 TRACE_ERROR("HEADERS on invalid stream ID", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau4781b152021-04-06 13:53:36 +02002724 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau22de8d32018-09-05 19:55:58 +02002725 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02002726 goto conn_err;
2727 }
Willy Tarreau415b1ee2019-01-02 13:59:43 +01002728 else if (h2c->flags & H2_CF_DEM_TOOMANY)
2729 goto out; // IDLE but too many cs still present
Willy Tarreau13278b42017-10-13 19:23:14 +02002730
Amaury Denoyelle74162742020-12-11 17:53:05 +01002731 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002732
Willy Tarreau25919232019-01-03 14:48:18 +01002733 /* unrecoverable error ? */
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002734 if (h2c->st0 >= H2_CS_ERROR)
2735 goto out;
2736
Willy Tarreau25919232019-01-03 14:48:18 +01002737 if (error <= 0) {
Christopher Faulet0de3f552021-10-08 08:56:00 +02002738 if (error == 0) {
2739 /* Demux not blocked because of the stream, it is an incomplete frame */
2740 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2741 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau25919232019-01-03 14:48:18 +01002742 goto out; // missing data
Christopher Faulet0de3f552021-10-08 08:56:00 +02002743 }
Willy Tarreau25919232019-01-03 14:48:18 +01002744
2745 /* Failed to decode this stream (e.g. too large request)
2746 * but the HPACK decompressor is still synchronized.
2747 */
2748 h2s = (struct h2s*)h2_error_stream;
2749 goto send_rst;
2750 }
2751
Willy Tarreau3c10d512021-06-17 08:29:14 +02002752 TRACE_USER("rcvd H2 request ", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW, h2c->conn, 0, &rxbuf);
2753
Willy Tarreau22de8d32018-09-05 19:55:58 +02002754 /* Note: we don't emit any other logs below because ff we return
Willy Tarreaua8e49542018-10-03 18:53:55 +02002755 * positively from h2c_frt_stream_new(), the stream will report the error,
2756 * and if we return in error, h2c_frt_stream_new() will emit the error.
Christopher Faulet7d013e72020-12-15 16:56:50 +01002757 *
2758 * Xfer the rxbuf to the stream. On success, the new stream owns the
2759 * rxbuf. On error, it is released here.
Willy Tarreau22de8d32018-09-05 19:55:58 +02002760 */
Amaury Denoyelleee7fcd52021-10-18 14:45:49 +02002761 h2s = h2c_frt_stream_new(h2c, h2c->dsi, &rxbuf, flags);
Willy Tarreau13278b42017-10-13 19:23:14 +02002762 if (!h2s) {
Willy Tarreau96a10c22018-12-23 18:30:44 +01002763 h2s = (struct h2s*)h2_refused_stream;
2764 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002765 }
2766
2767 h2s->st = H2_SS_OPEN;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002768 h2s->flags |= flags;
Willy Tarreau1915ca22019-01-24 11:49:37 +01002769 h2s->body_len = body_len;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002770
Willy Tarreau88d138e2019-01-02 19:38:14 +01002771 done:
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002772 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau13278b42017-10-13 19:23:14 +02002773 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002774
2775 if (h2s->flags & H2_SF_ES_RCVD) {
Willy Tarreaufc10f592019-01-30 19:28:32 +01002776 if (h2s->st == H2_SS_OPEN)
2777 h2s->st = H2_SS_HREM;
2778 else
2779 h2s_close(h2s);
Willy Tarreau13278b42017-10-13 19:23:14 +02002780 }
2781
Willy Tarreau3a429f02019-01-03 11:41:50 +01002782 /* update the max stream ID if the request is being processed */
2783 if (h2s->id > h2c->max_id)
2784 h2c->max_id = h2s->id;
Willy Tarreau13278b42017-10-13 19:23:14 +02002785
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002786 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002787
2788 conn_err:
2789 h2c_error(h2c, error);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002790 goto out;
Willy Tarreau13278b42017-10-13 19:23:14 +02002791
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002792 out:
2793 h2_release_buf(h2c, &rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002794 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 +01002795 return NULL;
Willy Tarreau96a10c22018-12-23 18:30:44 +01002796
2797 send_rst:
2798 /* make the demux send an RST for the current stream. We may only
2799 * do this if we're certain that the HEADERS frame was properly
2800 * decompressed so that the HPACK decoder is still kept up to date.
2801 */
2802 h2_release_buf(h2c, &rxbuf);
2803 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002804
Willy Tarreau022e5e52020-09-10 09:33:15 +02002805 TRACE_USER("rejected H2 request", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn, 0, &rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002806 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau96a10c22018-12-23 18:30:44 +01002807 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002808}
2809
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002810/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2811 * It may return an error in h2c or h2s. Described in RFC7540#6.2. Most of the
2812 * errors here are reported as connection errors since it's impossible to
2813 * recover from such errors after the compression context has been altered.
2814 */
2815static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
2816{
Christopher Faulet6884aa32019-09-23 15:28:20 +02002817 struct buffer rxbuf = BUF_NULL;
2818 unsigned long long body_len = 0;
2819 uint32_t flags = 0;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002820 int error;
2821
Willy Tarreau7838a792019-08-12 18:42:03 +02002822 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2823
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002824 if (!b_size(&h2c->dbuf)) {
2825 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002826 goto fail; // empty buffer
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002827 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002828
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002829 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2830 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002831 goto fail; // incomplete frame
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002832 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002833
Christopher Faulet6884aa32019-09-23 15:28:20 +02002834 if (h2s->st != H2_SS_CLOSED) {
Amaury Denoyelle74162742020-12-11 17:53:05 +01002835 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &h2s->body_len, h2s->upgrade_protocol);
Christopher Faulet6884aa32019-09-23 15:28:20 +02002836 }
2837 else {
2838 /* the connection was already killed by an RST, let's consume
2839 * the data and send another RST.
2840 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01002841 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Christopher Fauletea7a7782019-09-26 16:19:13 +02002842 h2s = (struct h2s*)h2_error_stream;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002843 h2c->st0 = H2_CS_FRAME_E;
2844 goto send_rst;
2845 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002846
Willy Tarreau25919232019-01-03 14:48:18 +01002847 /* unrecoverable error ? */
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002848 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002849 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002850
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002851 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2852 /* RFC7540#5.1 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002853 TRACE_ERROR("response HEADERS in invalid state", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002854 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2855 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau4781b152021-04-06 13:53:36 +02002856 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002857 goto fail;
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002858 }
2859
Willy Tarreau25919232019-01-03 14:48:18 +01002860 if (error <= 0) {
Christopher Faulet0de3f552021-10-08 08:56:00 +02002861 if (error == 0) {
2862 /* Demux not blocked because of the stream, it is an incomplete frame */
2863 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2864 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002865 goto fail; // missing data
Christopher Faulet0de3f552021-10-08 08:56:00 +02002866 }
Willy Tarreau25919232019-01-03 14:48:18 +01002867
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002868 /* stream error : send RST_STREAM */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002869 TRACE_ERROR("couldn't decode response HEADERS", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau25919232019-01-03 14:48:18 +01002870 h2s_error(h2s, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002871 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau4781b152021-04-06 13:53:36 +02002872 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002873 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002874 }
2875
Christopher Fauletfa922f02019-05-07 10:55:17 +02002876 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002877 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002878
Willy Tarreau927b88b2019-03-04 08:03:25 +01002879 if (h2s->cs && h2s->cs->flags & CS_FL_ERROR && h2s->st < H2_SS_ERROR)
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002880 h2s->st = H2_SS_ERROR;
Christopher Fauletfa922f02019-05-07 10:55:17 +02002881 else if (h2s->flags & H2_SF_ES_RCVD) {
2882 if (h2s->st == H2_SS_OPEN)
2883 h2s->st = H2_SS_HREM;
2884 else if (h2s->st == H2_SS_HLOC)
2885 h2s_close(h2s);
2886 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002887
Christopher Fauletf95f8762021-01-22 11:59:07 +01002888 /* Unblock busy server h2s waiting for the response headers to validate
2889 * the tunnel establishment or the end of the response of an oborted
2890 * tunnel
2891 */
2892 if ((h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY)) == (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY) ||
2893 (h2s->flags & (H2_SF_TUNNEL_ABRT|H2_SF_ES_RCVD|H2_SF_BLK_MBUSY)) == (H2_SF_TUNNEL_ABRT|H2_SF_ES_RCVD|H2_SF_BLK_MBUSY)) {
2894 TRACE_STATE("Unblock h2s blocked on tunnel establishment/abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2895 h2s->flags &= ~H2_SF_BLK_MBUSY;
2896 }
2897
Willy Tarreaucbd37e02021-06-16 18:32:42 +02002898 TRACE_USER("rcvd H2 response ", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, 0, &h2s->rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002899 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002900 return h2s;
Willy Tarreau7838a792019-08-12 18:42:03 +02002901 fail:
2902 TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2903 return NULL;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002904
2905 send_rst:
2906 /* make the demux send an RST for the current stream. We may only
2907 * do this if we're certain that the HEADERS frame was properly
2908 * decompressed so that the HPACK decoder is still kept up to date.
2909 */
2910 h2_release_buf(h2c, &rxbuf);
2911 h2c->st0 = H2_CS_FRAME_E;
2912
Willy Tarreau022e5e52020-09-10 09:33:15 +02002913 TRACE_USER("rejected H2 response", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn, 0, &rxbuf);
Christopher Faulet6884aa32019-09-23 15:28:20 +02002914 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2915 return h2s;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002916}
2917
Willy Tarreau454f9052017-10-26 19:40:35 +02002918/* processes a DATA frame. Returns > 0 on success or zero on missing data.
2919 * It may return an error in h2c or h2s. Described in RFC7540#6.1.
2920 */
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01002921static int h2c_handle_data(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02002922{
2923 int error;
2924
Willy Tarreau7838a792019-08-12 18:42:03 +02002925 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2926
Willy Tarreau454f9052017-10-26 19:40:35 +02002927 /* note that empty DATA frames are perfectly valid and sometimes used
2928 * to signal an end of stream (with the ES flag).
2929 */
2930
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002931 if (!b_size(&h2c->dbuf) && h2c->dfl) {
2932 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002933 goto fail; // empty buffer
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002934 }
Willy Tarreau454f9052017-10-26 19:40:35 +02002935
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002936 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2937 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002938 goto fail; // incomplete frame
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002939 }
Willy Tarreau454f9052017-10-26 19:40:35 +02002940
2941 /* now either the frame is complete or the buffer is complete */
2942
Willy Tarreau454f9052017-10-26 19:40:35 +02002943 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2944 /* RFC7540#6.1 */
2945 error = H2_ERR_STREAM_CLOSED;
2946 goto strm_err;
2947 }
2948
Christopher Faulet4f09ec82019-06-19 09:25:58 +02002949 if ((h2s->flags & H2_SF_DATA_CLEN) && (h2c->dfl - h2c->dpl) > h2s->body_len) {
Willy Tarreau1915ca22019-01-24 11:49:37 +01002950 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002951 TRACE_ERROR("DATA frame larger than content-length", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau1915ca22019-01-24 11:49:37 +01002952 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002953 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau1915ca22019-01-24 11:49:37 +01002954 goto strm_err;
2955 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01002956 if (!(h2c->flags & H2_CF_IS_BACK) &&
2957 (h2s->flags & (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT)) == (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT) &&
2958 ((h2c->dfl - h2c->dpl) || !(h2c->dff & H2_F_DATA_END_STREAM))) {
2959 /* a tunnel attempt was aborted but the client still try to send some raw data.
2960 * Thus the stream is closed with the CANCEL error. Here we take care it is not
2961 * an empty DATA Frame with the ES flag. The error is only handled if ES was
2962 * already sent to the client because depending on the scheduling, these data may
Ilya Shipitsinacf84592021-02-06 22:29:08 +05002963 * have been sent before the server response but not handle here.
Christopher Faulet91b21dc2021-01-22 12:13:15 +01002964 */
2965 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2966 error = H2_ERR_CANCEL;
2967 goto strm_err;
2968 }
Willy Tarreau1915ca22019-01-24 11:49:37 +01002969
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002970 if (!h2_frt_transfer_data(h2s))
Willy Tarreau7838a792019-08-12 18:42:03 +02002971 goto fail;
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002972
Willy Tarreau454f9052017-10-26 19:40:35 +02002973 /* call the upper layers to process the frame, then let the upper layer
2974 * notify the stream about any change.
2975 */
2976 if (!h2s->cs) {
Willy Tarreau082c4572019-08-06 10:11:02 +02002977 /* The upper layer has already closed, this may happen on
2978 * 4xx/redirects during POST, or when receiving a response
2979 * from an H2 server after the client has aborted.
2980 */
2981 error = H2_ERR_CANCEL;
Willy Tarreau454f9052017-10-26 19:40:35 +02002982 goto strm_err;
2983 }
2984
Willy Tarreau8f650c32017-11-21 19:36:21 +01002985 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002986 goto fail;
Willy Tarreau8f650c32017-11-21 19:36:21 +01002987
Willy Tarreau721c9742017-11-07 11:05:42 +01002988 if (h2s->st >= H2_SS_ERROR) {
Willy Tarreau454f9052017-10-26 19:40:35 +02002989 /* stream error : send RST_STREAM */
Willy Tarreaua20a5192017-12-27 11:02:06 +01002990 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02002991 }
2992
2993 /* check for completion : the callee will change this to FRAME_A or
2994 * FRAME_H once done.
2995 */
2996 if (h2c->st0 == H2_CS_FRAME_P)
Willy Tarreau7838a792019-08-12 18:42:03 +02002997 goto fail;
Willy Tarreau454f9052017-10-26 19:40:35 +02002998
Willy Tarreauc4134ba2017-12-11 18:45:08 +01002999 /* last frame */
3000 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02003001 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreaufc10f592019-01-30 19:28:32 +01003002 if (h2s->st == H2_SS_OPEN)
3003 h2s->st = H2_SS_HREM;
3004 else
3005 h2s_close(h2s);
3006
Willy Tarreau1915ca22019-01-24 11:49:37 +01003007 if (h2s->flags & H2_SF_DATA_CLEN && h2s->body_len) {
3008 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003009 TRACE_ERROR("ES on DATA frame before content-length", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau1915ca22019-01-24 11:49:37 +01003010 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02003011 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau1915ca22019-01-24 11:49:37 +01003012 goto strm_err;
3013 }
Willy Tarreauc4134ba2017-12-11 18:45:08 +01003014 }
3015
Christopher Fauletf95f8762021-01-22 11:59:07 +01003016 /* Unblock busy server h2s waiting for the end of the response for an
3017 * aborted tunnel
3018 */
3019 if ((h2c->flags & H2_CF_IS_BACK) &&
3020 (h2s->flags & (H2_SF_TUNNEL_ABRT|H2_SF_ES_RCVD|H2_SF_BLK_MBUSY)) == (H2_SF_TUNNEL_ABRT|H2_SF_ES_RCVD|H2_SF_BLK_MBUSY)) {
3021 TRACE_STATE("Unblock h2s blocked on tunnel abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
3022 h2s->flags &= ~H2_SF_BLK_MBUSY;
3023 }
3024
Willy Tarreau7838a792019-08-12 18:42:03 +02003025 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02003026 return 1;
3027
Willy Tarreau454f9052017-10-26 19:40:35 +02003028 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01003029 h2s_error(h2s, error);
3030 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003031 fail:
3032 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 +02003033 return 0;
3034}
3035
Willy Tarreau63864812019-08-07 14:25:20 +02003036/* check that the current frame described in h2c->{dsi,dft,dfl,dff,...} is
3037 * valid for the current stream state. This is needed only after parsing the
3038 * frame header but in practice it can be performed at any time during
3039 * H2_CS_FRAME_P since no state transition happens there. Returns >0 on success
3040 * or 0 in case of error, in which case either h2s or h2c will carry an error.
3041 */
3042static int h2_frame_check_vs_state(struct h2c *h2c, struct h2s *h2s)
3043{
Willy Tarreau7838a792019-08-12 18:42:03 +02003044 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
3045
Willy Tarreau63864812019-08-07 14:25:20 +02003046 if (h2s->st == H2_SS_IDLE &&
3047 h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) {
3048 /* RFC7540#5.1: any frame other than HEADERS or PRIORITY in
3049 * this state MUST be treated as a connection error
3050 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003051 TRACE_ERROR("invalid frame type for IDLE state", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02003052 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003053 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau63864812019-08-07 14:25:20 +02003054 /* only log if no other stream can report the error */
3055 sess_log(h2c->conn->owner);
3056 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003057 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02003058 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 +02003059 return 0;
3060 }
3061
Willy Tarreau57a18162019-11-24 14:57:53 +01003062 if (h2s->st == H2_SS_IDLE && (h2c->flags & H2_CF_IS_BACK)) {
3063 /* only PUSH_PROMISE would be permitted here */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003064 TRACE_ERROR("invalid frame type for IDLE state (back)", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
Willy Tarreau57a18162019-11-24 14:57:53 +01003065 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02003066 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau57a18162019-11-24 14:57:53 +01003067 TRACE_DEVEL("leaving in error (idle&back)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s);
3068 return 0;
3069 }
3070
Willy Tarreau63864812019-08-07 14:25:20 +02003071 if (h2s->st == H2_SS_HREM && h2c->dft != H2_FT_WINDOW_UPDATE &&
3072 h2c->dft != H2_FT_RST_STREAM && h2c->dft != H2_FT_PRIORITY) {
3073 /* RFC7540#5.1: any frame other than WU/PRIO/RST in
3074 * this state MUST be treated as a stream error.
3075 * 6.2, 6.6 and 6.10 further mandate that HEADERS/
3076 * PUSH_PROMISE/CONTINUATION cause connection errors.
3077 */
Amaury Denoyellea8879232020-10-27 17:16:03 +01003078 if (h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003079 TRACE_ERROR("invalid frame type for HREM state", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02003080 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02003081 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Amaury Denoyellea8879232020-10-27 17:16:03 +01003082 }
3083 else {
Willy Tarreau63864812019-08-07 14:25:20 +02003084 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
Amaury Denoyellea8879232020-10-27 17:16:03 +01003085 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003086 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 +02003087 return 0;
3088 }
3089
3090 /* Below the management of frames received in closed state is a
3091 * bit hackish because the spec makes strong differences between
3092 * streams closed by receiving RST, sending RST, and seeing ES
3093 * in both directions. In addition to this, the creation of a
3094 * new stream reusing the identifier of a closed one will be
3095 * detected here. Given that we cannot keep track of all closed
3096 * streams forever, we consider that unknown closed streams were
3097 * closed on RST received, which allows us to respond with an
3098 * RST without breaking the connection (eg: to abort a transfer).
3099 * Some frames have to be silently ignored as well.
3100 */
3101 if (h2s->st == H2_SS_CLOSED && h2c->dsi) {
3102 if (!(h2c->flags & H2_CF_IS_BACK) && h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
3103 /* #5.1.1: The identifier of a newly
3104 * established stream MUST be numerically
3105 * greater than all streams that the initiating
3106 * endpoint has opened or reserved. This
3107 * governs streams that are opened using a
3108 * HEADERS frame and streams that are reserved
3109 * using PUSH_PROMISE. An endpoint that
3110 * receives an unexpected stream identifier
3111 * MUST respond with a connection error.
3112 */
3113 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003114 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 +02003115 return 0;
3116 }
3117
Willy Tarreau4c08f122019-09-26 08:47:15 +02003118 if (h2s->flags & H2_SF_RST_RCVD &&
3119 !(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 +02003120 /* RFC7540#5.1:closed: an endpoint that
3121 * receives any frame other than PRIORITY after
3122 * receiving a RST_STREAM MUST treat that as a
3123 * stream error of type STREAM_CLOSED.
3124 *
3125 * Note that old streams fall into this category
3126 * and will lead to an RST being sent.
3127 *
3128 * However, we cannot generalize this to all frame types. Those
3129 * carrying compression state must still be processed before
3130 * being dropped or we'll desynchronize the decoder. This can
3131 * happen with request trailers received after sending an
3132 * RST_STREAM, or with header/trailers responses received after
3133 * sending RST_STREAM (aborted stream).
Willy Tarreau4c08f122019-09-26 08:47:15 +02003134 *
3135 * In addition, since our CLOSED streams always carry the
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003136 * RST_RCVD bit, we don't want to accidentally catch valid
Willy Tarreau4c08f122019-09-26 08:47:15 +02003137 * frames for a closed stream, i.e. RST/PRIO/WU.
Willy Tarreau63864812019-08-07 14:25:20 +02003138 */
3139 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
3140 h2c->st0 = H2_CS_FRAME_E;
Christopher Faulet6884aa32019-09-23 15:28:20 +02003141 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 +02003142 return 0;
3143 }
3144
3145 /* RFC7540#5.1:closed: if this state is reached as a
3146 * result of sending a RST_STREAM frame, the peer that
3147 * receives the RST_STREAM might have already sent
3148 * frames on the stream that cannot be withdrawn. An
3149 * endpoint MUST ignore frames that it receives on
3150 * closed streams after it has sent a RST_STREAM
3151 * frame. An endpoint MAY choose to limit the period
3152 * over which it ignores frames and treat frames that
3153 * arrive after this time as being in error.
3154 */
3155 if (h2s->id && !(h2s->flags & H2_SF_RST_SENT)) {
3156 /* RFC7540#5.1:closed: any frame other than
3157 * PRIO/WU/RST in this state MUST be treated as
3158 * a connection error
3159 */
3160 if (h2c->dft != H2_FT_RST_STREAM &&
3161 h2c->dft != H2_FT_PRIORITY &&
3162 h2c->dft != H2_FT_WINDOW_UPDATE) {
3163 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003164 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 +02003165 return 0;
3166 }
3167 }
3168 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003169 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02003170 return 1;
3171}
3172
Willy Tarreaubc933932017-10-09 16:21:43 +02003173/* process Rx frames to be demultiplexed */
3174static void h2_process_demux(struct h2c *h2c)
3175{
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003176 struct h2s *h2s = NULL, *tmp_h2s;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003177 struct h2_fh hdr;
3178 unsigned int padlen = 0;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003179 int32_t old_iw = h2c->miw;
Willy Tarreauf3ee0692017-10-17 08:18:25 +02003180
Willy Tarreau7838a792019-08-12 18:42:03 +02003181 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3182
Willy Tarreau081d4722017-05-16 21:51:05 +02003183 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02003184 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02003185
3186 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3187 if (h2c->st0 == H2_CS_PREFACE) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003188 TRACE_STATE("expecting preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02003189 if (h2c->flags & H2_CF_IS_BACK)
Willy Tarreau7838a792019-08-12 18:42:03 +02003190 goto out;
3191
Willy Tarreau52eed752017-09-22 15:05:09 +02003192 if (unlikely(h2c_frt_recv_preface(h2c) <= 0)) {
3193 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02003194 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003195 TRACE_PROTO("failed to receive preface", H2_EV_RX_PREFACE|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003196 h2c->st0 = H2_CS_ERROR2;
Willy Tarreauc23d6d12021-06-17 08:08:48 +02003197 if (b_data(&h2c->dbuf) ||
Christopher Faulet79b347d2021-07-26 10:18:35 +02003198 !(((const struct session *)h2c->conn->owner)->fe->options & (PR_O_NULLNOLOG|PR_O_IGNORE_PRB)))
Willy Tarreauc23d6d12021-06-17 08:08:48 +02003199 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02003200 }
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003201 goto done;
Willy Tarreau52eed752017-09-22 15:05:09 +02003202 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003203 TRACE_PROTO("received preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003204
3205 h2c->max_id = 0;
3206 h2c->st0 = H2_CS_SETTINGS1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003207 TRACE_STATE("switching to SETTINGS1", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003208 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003209
3210 if (h2c->st0 == H2_CS_SETTINGS1) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003211 /* ensure that what is pending is a valid SETTINGS frame
3212 * without an ACK.
3213 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003214 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 +02003215 if (!h2_get_frame_hdr(&h2c->dbuf, &hdr)) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003216 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003217 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau22de8d32018-09-05 19:55:58 +02003218 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003219 TRACE_ERROR("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 +02003220 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003221 if (!(h2c->flags & H2_CF_IS_BACK))
3222 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02003223 }
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003224 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003225 }
3226
3227 if (hdr.sid || hdr.ft != H2_FT_SETTINGS || hdr.ff & H2_F_SETTINGS_ACK) {
3228 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003229 TRACE_ERROR("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 +02003230 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
3231 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003232 if (!(h2c->flags & H2_CF_IS_BACK))
3233 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003234 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003235 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003236 }
3237
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003238 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003239 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003240 TRACE_ERROR("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 +02003241 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
3242 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003243 if (!(h2c->flags & H2_CF_IS_BACK))
3244 sess_log(h2c->conn->owner);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003245 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003246 }
3247
Willy Tarreau3bf69182018-12-21 15:34:50 +01003248 /* that's OK, switch to FRAME_P to process it. This is
3249 * a SETTINGS frame whose header has already been
3250 * deleted above.
3251 */
Willy Tarreau54f46e52019-01-30 15:11:03 +01003252 padlen = 0;
Willy Tarreau4781b152021-04-06 13:53:36 +02003253 HA_ATOMIC_INC(&h2c->px_counters->settings_rcvd);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003254 goto new_frame;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003255 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003256 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003257
3258 /* process as many incoming frames as possible below */
Willy Tarreau7838a792019-08-12 18:42:03 +02003259 while (1) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02003260 int ret = 0;
3261
Willy Tarreau7838a792019-08-12 18:42:03 +02003262 if (!b_data(&h2c->dbuf)) {
3263 TRACE_DEVEL("no more Rx data", H2_EV_RX_FRAME, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003264 h2c->flags |= H2_CF_DEM_SHORT_READ;
3265 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003266 }
3267
3268 if (h2c->st0 >= H2_CS_ERROR) {
3269 TRACE_STATE("end of connection reported", H2_EV_RX_FRAME|H2_EV_RX_EOI, h2c->conn);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003270 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003271 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003272
3273 if (h2c->st0 == H2_CS_FRAME_H) {
Willy Tarreau30d05f32019-08-06 15:49:51 +02003274 h2c->rcvd_s = 0;
3275
Willy Tarreau7838a792019-08-12 18:42:03 +02003276 TRACE_STATE("expecting H2 frame header", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003277 if (!h2_peek_frame_hdr(&h2c->dbuf, 0, &hdr)) {
3278 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003279 break;
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003280 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003281
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003282 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003283 TRACE_ERROR("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 +02003284 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003285 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02003286 /* only log if no other stream can report the error */
3287 sess_log(h2c->conn->owner);
3288 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003289 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003290 break;
3291 }
3292
Christopher Fauletdd2a5622019-06-18 12:22:38 +02003293 padlen = 0;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003294 if (h2_ft_bit(hdr.ft) & H2_FT_PADDED_MASK && hdr.ff & H2_F_PADDED) {
3295 /* If the frame is padded (HEADERS, PUSH_PROMISE or DATA),
3296 * we read the pad length and drop it from the remaining
3297 * payload (one byte + the 9 remaining ones = 10 total
3298 * removed), so we have a frame payload starting after the
3299 * pad len. Flow controlled frames (DATA) also count the
3300 * padlen in the flow control, so it must be adjusted.
3301 */
3302 if (hdr.len < 1) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003303 TRACE_ERROR("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 +01003304 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003305 if (!(h2c->flags & H2_CF_IS_BACK))
3306 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003307 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003308 goto done;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003309 }
3310 hdr.len--;
3311
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003312 if (b_data(&h2c->dbuf) < 10) {
3313 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003314 break; // missing padlen
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003315 }
Willy Tarreau3bf69182018-12-21 15:34:50 +01003316
3317 padlen = *(uint8_t *)b_peek(&h2c->dbuf, 9);
3318
3319 if (padlen > hdr.len) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003320 TRACE_ERROR("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 +01003321 /* RFC7540#6.1 : pad length = length of
3322 * frame payload or greater => error.
3323 */
3324 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003325 if (!(h2c->flags & H2_CF_IS_BACK))
3326 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003327 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003328 goto done;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003329 }
3330
3331 if (h2_ft_bit(hdr.ft) & H2_FT_FC_MASK) {
3332 h2c->rcvd_c++;
3333 h2c->rcvd_s++;
3334 }
3335 b_del(&h2c->dbuf, 1);
3336 }
3337 h2_skip_frame_hdr(&h2c->dbuf);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003338
3339 new_frame:
Willy Tarreau7e98c052017-10-10 15:56:59 +02003340 h2c->dfl = hdr.len;
3341 h2c->dsi = hdr.sid;
3342 h2c->dft = hdr.ft;
3343 h2c->dff = hdr.ff;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003344 h2c->dpl = padlen;
Willy Tarreau73db4342019-09-25 07:28:44 +02003345 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 +02003346 h2c->st0 = H2_CS_FRAME_P;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003347
3348 /* check for minimum basic frame format validity */
3349 ret = h2_frame_check(h2c->dft, 1, h2c->dsi, h2c->dfl, global.tune.bufsize);
3350 if (ret != H2_ERR_NO_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003351 TRACE_ERROR("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 +01003352 h2c_error(h2c, ret);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003353 if (!(h2c->flags & H2_CF_IS_BACK))
3354 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003355 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003356 goto done;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003357 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003358 }
3359
Willy Tarreau9fd5aa82019-08-06 15:21:45 +02003360 /* Only H2_CS_FRAME_P, H2_CS_FRAME_A and H2_CS_FRAME_E here.
3361 * H2_CS_FRAME_P indicates an incomplete previous operation
3362 * (most often the first attempt) and requires some validity
3363 * checks for the frame and the current state. The two other
3364 * ones are set after completion (or abortion) and must skip
3365 * validity checks.
3366 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003367 tmp_h2s = h2c_st_by_id(h2c, h2c->dsi);
3368
Willy Tarreau567beb82018-12-18 16:52:44 +01003369 if (tmp_h2s != h2s && h2s && h2s->cs &&
3370 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003371 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003372 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003373 (h2s->flags & H2_SF_ES_RCVD) ||
3374 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003375 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003376 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 +01003377 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003378 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003379 }
3380 h2s = tmp_h2s;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003381
Willy Tarreau63864812019-08-07 14:25:20 +02003382 if (h2c->st0 == H2_CS_FRAME_E ||
Willy Tarreau7838a792019-08-12 18:42:03 +02003383 (h2c->st0 == H2_CS_FRAME_P && !h2_frame_check_vs_state(h2c, h2s))) {
3384 TRACE_PROTO("stream error reported", H2_EV_RX_FRAME|H2_EV_PROTO_ERR, h2c->conn, h2s);
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003385 goto strm_err;
Willy Tarreau7838a792019-08-12 18:42:03 +02003386 }
Willy Tarreauc0da1962017-10-30 18:38:00 +01003387
Willy Tarreau7e98c052017-10-10 15:56:59 +02003388 switch (h2c->dft) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02003389 case H2_FT_SETTINGS:
Willy Tarreau7838a792019-08-12 18:42:03 +02003390 if (h2c->st0 == H2_CS_FRAME_P) {
3391 TRACE_PROTO("receiving H2 SETTINGS frame", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn, h2s);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003392 ret = h2c_handle_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003393 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003394 HA_ATOMIC_INC(&h2c->px_counters->settings_rcvd);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003395
Willy Tarreau7838a792019-08-12 18:42:03 +02003396 if (h2c->st0 == H2_CS_FRAME_A) {
3397 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 +02003398 ret = h2c_ack_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003399 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003400 break;
3401
Willy Tarreaucf68c782017-10-10 17:11:41 +02003402 case H2_FT_PING:
Willy Tarreau7838a792019-08-12 18:42:03 +02003403 if (h2c->st0 == H2_CS_FRAME_P) {
3404 TRACE_PROTO("receiving H2 PING frame", H2_EV_RX_FRAME|H2_EV_RX_PING, h2c->conn, h2s);
Willy Tarreaucf68c782017-10-10 17:11:41 +02003405 ret = h2c_handle_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003406 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003407
Willy Tarreau7838a792019-08-12 18:42:03 +02003408 if (h2c->st0 == H2_CS_FRAME_A) {
3409 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 +02003410 ret = h2c_ack_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003411 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003412 break;
3413
Willy Tarreau26f95952017-07-27 17:18:30 +02003414 case H2_FT_WINDOW_UPDATE:
Willy Tarreau7838a792019-08-12 18:42:03 +02003415 if (h2c->st0 == H2_CS_FRAME_P) {
3416 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 +02003417 ret = h2c_handle_window_update(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003418 }
Willy Tarreau26f95952017-07-27 17:18:30 +02003419 break;
3420
Willy Tarreau61290ec2017-10-17 08:19:21 +02003421 case H2_FT_CONTINUATION:
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003422 /* RFC7540#6.10: CONTINUATION may only be preceded by
Willy Tarreauea18f862018-12-22 20:19:26 +01003423 * a HEADERS/PUSH_PROMISE/CONTINUATION frame. These
3424 * frames' parsers consume all following CONTINUATION
3425 * frames so this one is out of sequence.
Willy Tarreau61290ec2017-10-17 08:19:21 +02003426 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003427 TRACE_ERROR("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 +01003428 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003429 if (!(h2c->flags & H2_CF_IS_BACK))
3430 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003431 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003432 goto done;
Willy Tarreau61290ec2017-10-17 08:19:21 +02003433
Willy Tarreau13278b42017-10-13 19:23:14 +02003434 case H2_FT_HEADERS:
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003435 if (h2c->st0 == H2_CS_FRAME_P) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003436 TRACE_PROTO("receiving H2 HEADERS frame", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02003437 if (h2c->flags & H2_CF_IS_BACK)
3438 tmp_h2s = h2c_bck_handle_headers(h2c, h2s);
3439 else
3440 tmp_h2s = h2c_frt_handle_headers(h2c, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003441 if (tmp_h2s) {
3442 h2s = tmp_h2s;
3443 ret = 1;
3444 }
3445 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003446 HA_ATOMIC_INC(&h2c->px_counters->headers_rcvd);
Willy Tarreau13278b42017-10-13 19:23:14 +02003447 break;
3448
Willy Tarreau454f9052017-10-26 19:40:35 +02003449 case H2_FT_DATA:
Willy Tarreau7838a792019-08-12 18:42:03 +02003450 if (h2c->st0 == H2_CS_FRAME_P) {
3451 TRACE_PROTO("receiving H2 DATA frame", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01003452 ret = h2c_handle_data(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003453 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003454 HA_ATOMIC_INC(&h2c->px_counters->data_rcvd);
Willy Tarreau454f9052017-10-26 19:40:35 +02003455
Willy Tarreau7838a792019-08-12 18:42:03 +02003456 if (h2c->st0 == H2_CS_FRAME_A) {
3457 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 +02003458 ret = h2c_send_strm_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003459 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003460 break;
Willy Tarreaucd234e92017-08-18 10:59:39 +02003461
Willy Tarreau92153fc2017-12-03 19:46:19 +01003462 case H2_FT_PRIORITY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003463 if (h2c->st0 == H2_CS_FRAME_P) {
3464 TRACE_PROTO("receiving H2 PRIORITY frame", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn, h2s);
Willy Tarreau92153fc2017-12-03 19:46:19 +01003465 ret = h2c_handle_priority(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003466 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01003467 break;
3468
Willy Tarreaucd234e92017-08-18 10:59:39 +02003469 case H2_FT_RST_STREAM:
Willy Tarreau7838a792019-08-12 18:42:03 +02003470 if (h2c->st0 == H2_CS_FRAME_P) {
3471 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 +02003472 ret = h2c_handle_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003473 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003474 HA_ATOMIC_INC(&h2c->px_counters->rst_stream_rcvd);
Willy Tarreaucd234e92017-08-18 10:59:39 +02003475 break;
3476
Willy Tarreaue96b0922017-10-30 00:28:29 +01003477 case H2_FT_GOAWAY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003478 if (h2c->st0 == H2_CS_FRAME_P) {
3479 TRACE_PROTO("receiving H2 GOAWAY frame", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn, h2s);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003480 ret = h2c_handle_goaway(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003481 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003482 HA_ATOMIC_INC(&h2c->px_counters->goaway_rcvd);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003483 break;
3484
Willy Tarreau1c661982017-10-30 13:52:01 +01003485 /* implement all extra frame types here */
Willy Tarreau7e98c052017-10-10 15:56:59 +02003486 default:
Willy Tarreau7838a792019-08-12 18:42:03 +02003487 TRACE_PROTO("receiving H2 ignored frame", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003488 /* drop frames that we ignore. They may be larger than
3489 * the buffer so we drain all of their contents until
3490 * we reach the end.
3491 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003492 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3493 b_del(&h2c->dbuf, ret);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003494 h2c->dfl -= ret;
3495 ret = h2c->dfl == 0;
3496 }
3497
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003498 strm_err:
Willy Tarreaua20a5192017-12-27 11:02:06 +01003499 /* We may have to send an RST if not done yet */
Willy Tarreau7838a792019-08-12 18:42:03 +02003500 if (h2s->st == H2_SS_ERROR) {
3501 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 +01003502 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003503 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003504
Willy Tarreau7838a792019-08-12 18:42:03 +02003505 if (h2c->st0 == H2_CS_FRAME_E) {
3506 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 +01003507 ret = h2c_send_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003508 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003509
Willy Tarreau7e98c052017-10-10 15:56:59 +02003510 /* error or missing data condition met above ? */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003511 if (ret <= 0)
Willy Tarreau7e98c052017-10-10 15:56:59 +02003512 break;
3513
3514 if (h2c->st0 != H2_CS_FRAME_H) {
Willy Tarreaubba7a4d2020-09-18 07:41:28 +02003515 if (h2c->dfl)
3516 TRACE_DEVEL("skipping remaining frame payload", H2_EV_RX_FRAME, h2c->conn, h2s);
Christopher Faulet5112a602019-09-26 16:38:28 +02003517 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3518 b_del(&h2c->dbuf, ret);
3519 h2c->dfl -= ret;
3520 if (!h2c->dfl) {
3521 TRACE_STATE("switching to FRAME_H", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
3522 h2c->st0 = H2_CS_FRAME_H;
3523 h2c->dsi = -1;
3524 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003525 }
3526 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003527
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003528 if (h2c->rcvd_c > 0 &&
Willy Tarreau7838a792019-08-12 18:42:03 +02003529 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))) {
3530 TRACE_PROTO("sending H2 WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003531 h2c_send_conn_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003532 }
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003533
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003534 done:
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003535 if (h2c->st0 >= H2_CS_ERROR || (h2c->flags & H2_CF_DEM_SHORT_READ)) {
3536 if (h2c->flags & H2_CF_RCVD_SHUT)
3537 h2c->flags |= H2_CF_END_REACHED;
3538 }
3539
Willy Tarreau567beb82018-12-18 16:52:44 +01003540 if (h2s && h2s->cs &&
3541 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003542 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003543 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003544 (h2s->flags & H2_SF_ES_RCVD) ||
3545 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003546 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003547 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 +01003548 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003549 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003550 }
Willy Tarreau1ed87b72018-11-25 08:45:16 +01003551
Willy Tarreau7838a792019-08-12 18:42:03 +02003552 if (old_iw != h2c->miw) {
3553 TRACE_STATE("notifying streams about SFCTL increase", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003554 h2c_unblock_sfctl(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003555 }
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003556
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003557 h2c_restart_reading(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02003558 out:
3559 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003560 return;
Willy Tarreaubc933932017-10-09 16:21:43 +02003561}
3562
Willy Tarreau989539b2020-01-10 17:01:29 +01003563/* resume each h2s eligible for sending in list head <head> */
3564static void h2_resume_each_sending_h2s(struct h2c *h2c, struct list *head)
3565{
3566 struct h2s *h2s, *h2s_back;
3567
3568 TRACE_ENTER(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3569
3570 list_for_each_entry_safe(h2s, h2s_back, head, list) {
3571 if (h2c->mws <= 0 ||
3572 h2c->flags & H2_CF_MUX_BLOCK_ANY ||
3573 h2c->st0 >= H2_CS_ERROR)
3574 break;
3575
3576 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003577
Willy Tarreaud9464162020-01-10 18:25:07 +01003578 if (h2s->flags & H2_SF_NOTIFIED)
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003579 continue;
3580
Willy Tarreau5723f292020-01-10 15:16:57 +01003581 /* If the sender changed his mind and unsubscribed, let's just
3582 * remove the stream from the send_list.
Willy Tarreau989539b2020-01-10 17:01:29 +01003583 */
Willy Tarreauf96508a2020-01-10 11:12:48 +01003584 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) &&
3585 (!h2s->subs || !(h2s->subs->events & SUB_RETRY_SEND))) {
Willy Tarreau989539b2020-01-10 17:01:29 +01003586 LIST_DEL_INIT(&h2s->list);
3587 continue;
3588 }
3589
Willy Tarreauf96508a2020-01-10 11:12:48 +01003590 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau5723f292020-01-10 15:16:57 +01003591 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01003592 tasklet_wakeup(h2s->subs->tasklet);
3593 h2s->subs->events &= ~SUB_RETRY_SEND;
3594 if (!h2s->subs->events)
3595 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01003596 }
3597 else if (h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) {
3598 tasklet_wakeup(h2s->shut_tl);
3599 }
Willy Tarreau989539b2020-01-10 17:01:29 +01003600 }
3601
3602 TRACE_LEAVE(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3603}
3604
Willy Tarreaubc933932017-10-09 16:21:43 +02003605/* process Tx frames from streams to be multiplexed. Returns > 0 if it reached
3606 * the end.
3607 */
3608static int h2_process_mux(struct h2c *h2c)
3609{
Willy Tarreau7838a792019-08-12 18:42:03 +02003610 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3611
Willy Tarreau01b44822018-10-03 14:26:37 +02003612 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3613 if (unlikely(h2c->st0 == H2_CS_PREFACE && (h2c->flags & H2_CF_IS_BACK))) {
3614 if (unlikely(h2c_bck_send_preface(h2c) <= 0)) {
3615 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003616 if (h2c->st0 == H2_CS_ERROR)
Willy Tarreau01b44822018-10-03 14:26:37 +02003617 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau01b44822018-10-03 14:26:37 +02003618 goto fail;
3619 }
3620 h2c->st0 = H2_CS_SETTINGS1;
3621 }
3622 /* need to wait for the other side */
Willy Tarreau75a930a2018-12-12 08:03:58 +01003623 if (h2c->st0 < H2_CS_FRAME_H)
Willy Tarreau7838a792019-08-12 18:42:03 +02003624 goto done;
Willy Tarreau01b44822018-10-03 14:26:37 +02003625 }
3626
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003627 /* start by sending possibly pending window updates */
Willy Tarreaue74679a2019-08-06 15:39:32 +02003628 if (h2c->rcvd_s > 0 &&
3629 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3630 h2c_send_strm_wu(h2c) < 0)
3631 goto fail;
3632
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003633 if (h2c->rcvd_c > 0 &&
3634 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3635 h2c_send_conn_wu(h2c) < 0)
3636 goto fail;
3637
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003638 /* First we always process the flow control list because the streams
3639 * waiting there were already elected for immediate emission but were
3640 * blocked just on this.
3641 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003642 h2_resume_each_sending_h2s(h2c, &h2c->fctl_list);
3643 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003644
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003645 fail:
Willy Tarreau3eabe9b2017-11-07 11:03:01 +01003646 if (unlikely(h2c->st0 >= H2_CS_ERROR)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02003647 if (h2c->st0 == H2_CS_ERROR) {
3648 if (h2c->max_id >= 0) {
3649 h2c_send_goaway_error(h2c, NULL);
3650 if (h2c->flags & H2_CF_MUX_BLOCK_ANY)
Willy Tarreau7838a792019-08-12 18:42:03 +02003651 goto out0;
Willy Tarreau081d4722017-05-16 21:51:05 +02003652 }
3653
3654 h2c->st0 = H2_CS_ERROR2; // sent (or failed hard) !
3655 }
Willy Tarreau081d4722017-05-16 21:51:05 +02003656 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003657 done:
3658 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
3659 return 1;
3660 out0:
3661 TRACE_DEVEL("leaving in blocked situation", H2_EV_H2C_WAKE, h2c->conn);
3662 return 0;
Willy Tarreaubc933932017-10-09 16:21:43 +02003663}
3664
Willy Tarreau62f52692017-10-08 23:01:42 +02003665
Willy Tarreau479998a2018-11-18 06:30:59 +01003666/* Attempt to read data, and subscribe if none available.
3667 * The function returns 1 if data has been received, otherwise zero.
3668 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003669static int h2_recv(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003670{
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003671 struct connection *conn = h2c->conn;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003672 struct buffer *buf;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003673 int max;
Olivier Houchard7505f942018-08-21 18:10:44 +02003674 size_t ret;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003675
Willy Tarreau7838a792019-08-12 18:42:03 +02003676 TRACE_ENTER(H2_EV_H2C_RECV, h2c->conn);
3677
3678 if (h2c->wait_event.events & SUB_RETRY_RECV) {
3679 TRACE_DEVEL("leaving on sub_recv", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003680 return (b_data(&h2c->dbuf));
Willy Tarreau7838a792019-08-12 18:42:03 +02003681 }
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003682
Willy Tarreau7838a792019-08-12 18:42:03 +02003683 if (!h2_recv_allowed(h2c)) {
3684 TRACE_DEVEL("leaving on !recv_allowed", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003685 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003686 }
Willy Tarreaua2af5122017-10-09 11:56:46 +02003687
Willy Tarreau44e973f2018-03-01 17:49:30 +01003688 buf = h2_get_buf(h2c, &h2c->dbuf);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003689 if (!buf) {
3690 h2c->flags |= H2_CF_DEM_DALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02003691 TRACE_DEVEL("leaving on !alloc", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003692 return 0;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003693 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003694
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003695 if (h2c->flags & H2_CF_RCVD_SHUT) {
3696 TRACE_DEVEL("leaving on rcvd_shut", H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau49acac02021-11-19 11:41:10 +01003697 return 1;
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003698 }
3699
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003700 if (!b_data(buf)) {
3701 /* try to pre-align the buffer like the
3702 * rxbufs will be to optimize memory copies. We'll make
3703 * sure that the frame header lands at the end of the
3704 * HTX block to alias it upon recv. We cannot use the
3705 * head because rcv_buf() will realign the buffer if
3706 * it's empty. Thus we cheat and pretend we already
3707 * have a few bytes there.
3708 */
3709 max = buf_room_for_htx_data(buf) + 9;
3710 buf->head = sizeof(struct htx) - 9;
3711 }
3712 else
3713 max = b_room(buf);
Willy Tarreau2a59e872018-12-12 08:23:47 +01003714
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003715 ret = max ? conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0) : 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003716
Christopher Fauletde9d6052021-04-23 12:25:18 +02003717 if (max && !ret && h2_recv_allowed(h2c)) {
3718 TRACE_DATA("failed to receive data, subscribing", H2_EV_H2C_RECV, h2c->conn);
3719 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h2c->wait_event);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003720 } else if (ret) {
Willy Tarreau022e5e52020-09-10 09:33:15 +02003721 TRACE_DATA("received data", H2_EV_H2C_RECV, h2c->conn, 0, 0, (void*)(long)ret);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003722 h2c->flags &= ~H2_CF_DEM_SHORT_READ;
3723 }
Olivier Houchard81a15af2018-10-19 17:26:49 +02003724
Christopher Fauletde9d6052021-04-23 12:25:18 +02003725 if (conn_xprt_read0_pending(h2c->conn)) {
3726 TRACE_DATA("received read0", H2_EV_H2C_RECV, h2c->conn);
3727 h2c->flags |= H2_CF_RCVD_SHUT;
3728 }
3729
Olivier Houcharda1411e62018-08-17 18:42:48 +02003730 if (!b_data(buf)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +01003731 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02003732 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard46677732018-11-29 17:06:17 +01003733 return (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003734 }
3735
Willy Tarreau7838a792019-08-12 18:42:03 +02003736 if (b_data(buf) == buf->size) {
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003737 h2c->flags |= H2_CF_DEM_DFULL;
Willy Tarreau35fb8462019-10-02 11:05:46 +02003738 TRACE_STATE("demux buffer full", H2_EV_H2C_RECV|H2_EV_H2C_BLK, h2c->conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003739 }
3740
3741 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003742 return !!ret || (conn->flags & CO_FL_ERROR) || conn_xprt_read0_pending(conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003743}
3744
Willy Tarreau479998a2018-11-18 06:30:59 +01003745/* Try to send data if possible.
3746 * The function returns 1 if data have been sent, otherwise zero.
3747 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003748static int h2_send(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003749{
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003750 struct connection *conn = h2c->conn;
Willy Tarreaubc933932017-10-09 16:21:43 +02003751 int done;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003752 int sent = 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003753
Willy Tarreau7838a792019-08-12 18:42:03 +02003754 TRACE_ENTER(H2_EV_H2C_SEND, h2c->conn);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003755
Willy Tarreau7838a792019-08-12 18:42:03 +02003756 if (conn->flags & CO_FL_ERROR) {
3757 TRACE_DEVEL("leaving on error", H2_EV_H2C_SEND, h2c->conn);
3758 return 1;
3759 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003760
Willy Tarreau911db9b2020-01-23 16:27:54 +01003761 if (conn->flags & CO_FL_WAIT_XPRT) {
Willy Tarreaua2af5122017-10-09 11:56:46 +02003762 /* a handshake was requested */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003763 goto schedule;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003764 }
3765
Willy Tarreaubc933932017-10-09 16:21:43 +02003766 /* This loop is quite simple : it tries to fill as much as it can from
3767 * pending streams into the existing buffer until it's reportedly full
3768 * or the end of send requests is reached. Then it tries to send this
3769 * buffer's contents out, marks it not full if at least one byte could
3770 * be sent, and tries again.
3771 *
3772 * The snd_buf() function normally takes a "flags" argument which may
3773 * be made of a combination of CO_SFL_MSG_MORE to indicate that more
3774 * data immediately comes and CO_SFL_STREAMER to indicate that the
3775 * connection is streaming lots of data (used to increase TLS record
3776 * size at the expense of latency). The former can be sent any time
3777 * there's a buffer full flag, as it indicates at least one stream
3778 * attempted to send and failed so there are pending data. An
3779 * alternative would be to set it as long as there's an active stream
3780 * but that would be problematic for ACKs until we have an absolute
3781 * guarantee that all waiters have at least one byte to send. The
3782 * latter should possibly not be set for now.
3783 */
3784
3785 done = 0;
3786 while (!done) {
3787 unsigned int flags = 0;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003788 unsigned int released = 0;
3789 struct buffer *buf;
Willy Tarreaubc933932017-10-09 16:21:43 +02003790
3791 /* fill as much as we can into the current buffer */
3792 while (((h2c->flags & (H2_CF_MUX_MFULL|H2_CF_MUX_MALLOC)) == 0) && !done)
3793 done = h2_process_mux(h2c);
3794
Olivier Houchard2b094432019-01-29 18:28:36 +01003795 if (h2c->flags & H2_CF_MUX_MALLOC)
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003796 done = 1; // we won't go further without extra buffers
Olivier Houchard2b094432019-01-29 18:28:36 +01003797
Christopher Faulet9a3d3fc2020-10-22 16:24:58 +02003798 if ((conn->flags & (CO_FL_SOCK_WR_SH|CO_FL_ERROR)) ||
Willy Tarreaue90653b2021-10-21 17:30:06 +02003799 (h2c->flags & H2_CF_GOAWAY_FAILED))
Willy Tarreaubc933932017-10-09 16:21:43 +02003800 break;
3801
3802 if (h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))
3803 flags |= CO_SFL_MSG_MORE;
3804
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003805 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3806 if (b_data(buf)) {
3807 int ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, buf, b_data(buf), flags);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003808 if (!ret) {
3809 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003810 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003811 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003812 sent = 1;
Willy Tarreau022e5e52020-09-10 09:33:15 +02003813 TRACE_DATA("sent data", H2_EV_H2C_SEND, h2c->conn, 0, buf, (void*)(long)ret);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003814 b_del(buf, ret);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003815 if (b_data(buf)) {
3816 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003817 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003818 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003819 }
3820 b_free(buf);
3821 released++;
Willy Tarreau787db9a2018-06-14 18:31:46 +02003822 }
Willy Tarreaubc933932017-10-09 16:21:43 +02003823
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003824 if (released)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01003825 offer_buffers(NULL, released);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003826
Willy Tarreaubc933932017-10-09 16:21:43 +02003827 /* wrote at least one byte, the buffer is not full anymore */
Christopher Faulet69fe5ce2019-10-24 10:31:01 +02003828 if (sent)
3829 h2c->flags &= ~(H2_CF_MUX_MFULL | H2_CF_DEM_MROOM);
Willy Tarreaubc933932017-10-09 16:21:43 +02003830 }
3831
Willy Tarreaua2af5122017-10-09 11:56:46 +02003832 if (conn->flags & CO_FL_SOCK_WR_SH) {
3833 /* output closed, nothing to send, clear the buffer to release it */
Willy Tarreau51330962019-05-26 09:38:07 +02003834 b_reset(br_tail(h2c->mbuf));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003835 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02003836 /* We're not full anymore, so we can wake any task that are waiting
3837 * for us.
3838 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003839 if (!(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM)) && h2c->st0 >= H2_CS_FRAME_H)
3840 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01003841
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003842 /* We're done, no more to send */
Willy Tarreau7838a792019-08-12 18:42:03 +02003843 if (!br_data(h2c->mbuf)) {
3844 TRACE_DEVEL("leaving with everything sent", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003845 return sent;
Willy Tarreau7838a792019-08-12 18:42:03 +02003846 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003847schedule:
Willy Tarreau7838a792019-08-12 18:42:03 +02003848 if (!(conn->flags & CO_FL_ERROR) && !(h2c->wait_event.events & SUB_RETRY_SEND)) {
3849 TRACE_STATE("more data to send, subscribing", H2_EV_H2C_SEND, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003850 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003851 }
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003852
Willy Tarreau7838a792019-08-12 18:42:03 +02003853 TRACE_DEVEL("leaving with some data left to send", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003854 return sent;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003855}
3856
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003857/* this is the tasklet referenced in h2c->wait_event.tasklet */
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003858struct task *h2_io_cb(struct task *t, void *ctx, unsigned int state)
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003859{
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003860 struct connection *conn;
3861 struct tasklet *tl = (struct tasklet *)t;
3862 int conn_in_list;
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003863 struct h2c *h2c = ctx;
Olivier Houchard7505f942018-08-21 18:10:44 +02003864 int ret = 0;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003865
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003866 if (state & TASK_F_USR1) {
3867 /* the tasklet was idling on an idle connection, it might have
3868 * been stolen, let's be careful!
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003869 */
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003870 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3871 if (t->context == NULL) {
3872 /* The connection has been taken over by another thread,
3873 * we're no longer responsible for it, so just free the
3874 * tasklet, and do nothing.
3875 */
3876 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3877 tasklet_free(tl);
Willy Tarreau74163142021-03-13 11:30:19 +01003878 t = NULL;
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003879 goto leave;
3880 }
3881 conn = h2c->conn;
3882 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003883
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003884 conn_in_list = conn->flags & CO_FL_LIST_MASK;
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003885
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003886 /* Remove the connection from the list, to be sure nobody attempts
3887 * to use it while we handle the I/O events
3888 */
3889 if (conn_in_list)
3890 conn_delete_from_tree(&conn->hash_node->node);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003891
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003892 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3893 } else {
3894 /* we're certain the connection was not in an idle list */
3895 conn = h2c->conn;
3896 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3897 conn_in_list = 0;
3898 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003899
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003900 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchard7505f942018-08-21 18:10:44 +02003901 ret = h2_send(h2c);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003902 if (!(h2c->wait_event.events & SUB_RETRY_RECV))
Olivier Houchard7505f942018-08-21 18:10:44 +02003903 ret |= h2_recv(h2c);
Willy Tarreaucef5c8e2018-12-18 10:29:54 +01003904 if (ret || b_data(&h2c->dbuf))
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003905 ret = h2_process(h2c);
3906
3907 /* If we were in an idle list, we want to add it back into it,
3908 * unless h2_process() returned -1, which mean it has destroyed
3909 * the connection (testing !ret is enough, if h2_process() wasn't
3910 * called then ret will be 0 anyway.
3911 */
Willy Tarreau74163142021-03-13 11:30:19 +01003912 if (ret < 0)
3913 t = NULL;
3914
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003915 if (!ret && conn_in_list) {
3916 struct server *srv = objt_server(conn->target);
3917
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01003918 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003919 if (conn_in_list == CO_FL_SAFE_LIST)
Willy Tarreau430bf4a2021-03-04 09:45:32 +01003920 ebmb_insert(&srv->per_thr[tid].safe_conns, &conn->hash_node->node, sizeof(conn->hash_node->hash));
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003921 else
Willy Tarreau430bf4a2021-03-04 09:45:32 +01003922 ebmb_insert(&srv->per_thr[tid].idle_conns, &conn->hash_node->node, sizeof(conn->hash_node->hash));
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01003923 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003924 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003925
Willy Tarreau38468772020-06-28 00:31:13 +02003926leave:
Willy Tarreau7838a792019-08-12 18:42:03 +02003927 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreau74163142021-03-13 11:30:19 +01003928 return t;
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003929}
Willy Tarreaua2af5122017-10-09 11:56:46 +02003930
Willy Tarreau62f52692017-10-08 23:01:42 +02003931/* callback called on any event by the connection handler.
3932 * It applies changes and returns zero, or < 0 if it wants immediate
3933 * destruction of the connection (which normally doesn not happen in h2).
3934 */
Olivier Houchard7505f942018-08-21 18:10:44 +02003935static int h2_process(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003936{
Olivier Houchard7505f942018-08-21 18:10:44 +02003937 struct connection *conn = h2c->conn;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003938
Willy Tarreau7838a792019-08-12 18:42:03 +02003939 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3940
Willy Tarreauf0961222021-02-05 11:41:46 +01003941 if (!(h2c->flags & H2_CF_DEM_BLOCK_ANY) &&
3942 (b_data(&h2c->dbuf) || (h2c->flags & H2_CF_RCVD_SHUT))) {
Willy Tarreaud13bf272017-12-14 10:34:52 +01003943 h2_process_demux(h2c);
3944
3945 if (h2c->st0 >= H2_CS_ERROR || conn->flags & CO_FL_ERROR)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003946 b_reset(&h2c->dbuf);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003947
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003948 if (!b_full(&h2c->dbuf))
Willy Tarreaud13bf272017-12-14 10:34:52 +01003949 h2c->flags &= ~H2_CF_DEM_DFULL;
3950 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003951 h2_send(h2c);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003952
Willy Tarreaub1e600c2020-10-13 18:09:15 +02003953 if (unlikely(h2c->proxy->disabled) && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau8ec14062017-12-30 18:08:13 +01003954 /* frontend is stopping, reload likely in progress, let's try
3955 * to announce a graceful shutdown if not yet done. We don't
3956 * care if it fails, it will be tried again later.
3957 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003958 TRACE_STATE("proxy stopped, sending GOAWAY", H2_EV_H2C_WAKE|H2_EV_TX_FRAME, conn);
Willy Tarreau8ec14062017-12-30 18:08:13 +01003959 if (!(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
3960 if (h2c->last_sid < 0)
3961 h2c->last_sid = (1U << 31) - 1;
3962 h2c_send_goaway_error(h2c, NULL);
3963 }
3964 }
3965
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003966 /*
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003967 * If we received early data, and the handshake is done, wake
3968 * any stream that was waiting for it.
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003969 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003970 if (!(h2c->flags & H2_CF_WAIT_FOR_HS) &&
Willy Tarreau911db9b2020-01-23 16:27:54 +01003971 (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_WAIT_XPRT | CO_FL_EARLY_DATA)) == CO_FL_EARLY_DATA) {
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003972 struct eb32_node *node;
3973 struct h2s *h2s;
3974
3975 h2c->flags |= H2_CF_WAIT_FOR_HS;
3976 node = eb32_lookup_ge(&h2c->streams_by_id, 1);
3977
3978 while (node) {
3979 h2s = container_of(node, struct h2s, by_id);
Willy Tarreaufde287c2018-12-19 18:33:16 +01003980 if (h2s->cs && h2s->cs->flags & CS_FL_WAIT_FOR_HS)
Willy Tarreau7e094452018-12-19 18:08:52 +01003981 h2s_notify_recv(h2s);
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003982 node = eb32_next(node);
3983 }
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003984 }
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003985
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003986 if (conn->flags & CO_FL_ERROR || h2c_read0_pending(h2c) ||
Willy Tarreau29a98242017-10-31 06:59:15 +01003987 h2c->st0 == H2_CS_ERROR2 || h2c->flags & H2_CF_GOAWAY_FAILED ||
3988 (eb_is_empty(&h2c->streams_by_id) && h2c->last_sid >= 0 &&
3989 h2c->max_id >= h2c->last_sid)) {
Willy Tarreau23482912019-05-07 15:23:14 +02003990 h2_wake_some_streams(h2c, 0);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003991
3992 if (eb_is_empty(&h2c->streams_by_id)) {
3993 /* no more stream, kill the connection now */
Christopher Faulet73c12072019-04-08 11:23:22 +02003994 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003995 TRACE_DEVEL("leaving after releasing the connection", H2_EV_H2C_WAKE);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003996 return -1;
3997 }
Willy Tarreau4481e262019-10-31 15:36:30 +01003998
3999 /* connections in error must be removed from the idle lists */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004000 if (conn->flags & CO_FL_LIST_MASK) {
4001 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004002 conn_delete_from_tree(&conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004003 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4004 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004005 }
4006 else if (h2c->st0 == H2_CS_ERROR) {
4007 /* connections in error must be removed from the idle lists */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004008 if (conn->flags & CO_FL_LIST_MASK) {
4009 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004010 conn_delete_from_tree(&conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004011 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4012 }
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004013 }
4014
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004015 if (!b_data(&h2c->dbuf))
Willy Tarreau44e973f2018-03-01 17:49:30 +01004016 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004017
Olivier Houchard53216e72018-10-10 15:46:36 +02004018 if ((conn->flags & CO_FL_SOCK_WR_SH) ||
4019 h2c->st0 == H2_CS_ERROR2 || (h2c->flags & H2_CF_GOAWAY_FAILED) ||
4020 (h2c->st0 != H2_CS_ERROR &&
Willy Tarreau662fafc2019-05-26 09:43:07 +02004021 !br_data(h2c->mbuf) &&
Olivier Houchard53216e72018-10-10 15:46:36 +02004022 (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) &&
4023 ((h2c->flags & H2_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&h2c->send_list))))
Willy Tarreau2e3c0002019-05-26 09:45:23 +02004024 h2_release_mbuf(h2c);
Willy Tarreaua2af5122017-10-09 11:56:46 +02004025
Willy Tarreau3f133572017-10-31 19:21:06 +01004026 if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02004027 if (h2c_may_expire(h2c))
4028 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
4029 else
4030 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02004031 task_queue(h2c->task);
Willy Tarreauea392822017-10-31 10:02:25 +01004032 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02004033
Olivier Houchard7505f942018-08-21 18:10:44 +02004034 h2_send(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004035 TRACE_LEAVE(H2_EV_H2C_WAKE, conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02004036 return 0;
4037}
4038
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004039/* wake-up function called by the connection layer (mux_ops.wake) */
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004040static int h2_wake(struct connection *conn)
4041{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004042 struct h2c *h2c = conn->ctx;
Willy Tarreau7838a792019-08-12 18:42:03 +02004043 int ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004044
Willy Tarreau7838a792019-08-12 18:42:03 +02004045 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
4046 ret = h2_process(h2c);
Willy Tarreau508f9892020-02-11 04:38:56 +01004047 if (ret >= 0)
4048 h2_wake_some_streams(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02004049 TRACE_LEAVE(H2_EV_H2C_WAKE);
4050 return ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004051}
4052
Willy Tarreauea392822017-10-31 10:02:25 +01004053/* Connection timeout management. The principle is that if there's no receipt
4054 * nor sending for a certain amount of time, the connection is closed. If the
4055 * MUX buffer still has lying data or is not allocatable, the connection is
4056 * immediately killed. If it's allocatable and empty, we attempt to send a
4057 * GOAWAY frame.
4058 */
Willy Tarreau144f84a2021-03-02 16:09:26 +01004059struct task *h2_timeout_task(struct task *t, void *context, unsigned int state)
Willy Tarreauea392822017-10-31 10:02:25 +01004060{
Olivier Houchard9f6af332018-05-25 14:04:04 +02004061 struct h2c *h2c = context;
Willy Tarreauea392822017-10-31 10:02:25 +01004062 int expired = tick_is_expired(t->expire, now_ms);
4063
Willy Tarreau7838a792019-08-12 18:42:03 +02004064 TRACE_ENTER(H2_EV_H2C_WAKE, h2c ? h2c->conn : NULL);
4065
Willy Tarreaubd42e922020-06-30 11:19:23 +02004066 if (h2c) {
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004067 /* Make sure nobody stole the connection from us */
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004068 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004069
4070 /* Somebody already stole the connection from us, so we should not
4071 * free it, we just have to free the task.
4072 */
4073 if (!t->context) {
4074 h2c = NULL;
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004075 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004076 goto do_leave;
4077 }
4078
4079
Willy Tarreaubd42e922020-06-30 11:19:23 +02004080 if (!expired) {
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004081 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004082 TRACE_DEVEL("leaving (not expired)", H2_EV_H2C_WAKE, h2c->conn);
4083 return t;
4084 }
Willy Tarreauea392822017-10-31 10:02:25 +01004085
Willy Tarreaubd42e922020-06-30 11:19:23 +02004086 if (!h2c_may_expire(h2c)) {
4087 /* we do still have streams but all of them are idle, waiting
4088 * for the data layer, so we must not enforce the timeout here.
4089 */
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004090 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004091 t->expire = TICK_ETERNITY;
4092 return t;
4093 }
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02004094
Willy Tarreaubd42e922020-06-30 11:19:23 +02004095 /* We're about to destroy the connection, so make sure nobody attempts
4096 * to steal it from us.
4097 */
Willy Tarreaubd42e922020-06-30 11:19:23 +02004098 if (h2c->conn->flags & CO_FL_LIST_MASK)
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004099 conn_delete_from_tree(&h2c->conn->hash_node->node);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004100
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004101 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004102 }
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004103
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004104do_leave:
Olivier Houchard3f795f72019-04-17 22:51:06 +02004105 task_destroy(t);
Willy Tarreau0975f112018-03-29 15:22:59 +02004106
4107 if (!h2c) {
4108 /* resources were already deleted */
Willy Tarreau7838a792019-08-12 18:42:03 +02004109 TRACE_DEVEL("leaving (not more h2c)", H2_EV_H2C_WAKE);
Willy Tarreau0975f112018-03-29 15:22:59 +02004110 return NULL;
4111 }
4112
4113 h2c->task = NULL;
Willy Tarreauea392822017-10-31 10:02:25 +01004114 h2c_error(h2c, H2_ERR_NO_ERROR);
Willy Tarreau23482912019-05-07 15:23:14 +02004115 h2_wake_some_streams(h2c, 0);
Willy Tarreauea392822017-10-31 10:02:25 +01004116
Willy Tarreau662fafc2019-05-26 09:43:07 +02004117 if (br_data(h2c->mbuf)) {
Willy Tarreauea392822017-10-31 10:02:25 +01004118 /* don't even try to send a GOAWAY, the buffer is stuck */
4119 h2c->flags |= H2_CF_GOAWAY_FAILED;
4120 }
4121
4122 /* try to send but no need to insist */
Willy Tarreau599391a2017-11-24 10:16:00 +01004123 h2c->last_sid = h2c->max_id;
Willy Tarreauea392822017-10-31 10:02:25 +01004124 if (h2c_send_goaway_error(h2c, NULL) <= 0)
4125 h2c->flags |= H2_CF_GOAWAY_FAILED;
4126
Willy Tarreau662fafc2019-05-26 09:43:07 +02004127 if (br_data(h2c->mbuf) && !(h2c->flags & H2_CF_GOAWAY_FAILED) && conn_xprt_ready(h2c->conn)) {
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004128 unsigned int released = 0;
4129 struct buffer *buf;
4130
4131 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
4132 if (b_data(buf)) {
4133 int ret = h2c->conn->xprt->snd_buf(h2c->conn, h2c->conn->xprt_ctx, buf, b_data(buf), 0);
4134 if (!ret)
4135 break;
4136 b_del(buf, ret);
4137 if (b_data(buf))
4138 break;
4139 b_free(buf);
4140 released++;
4141 }
Willy Tarreau787db9a2018-06-14 18:31:46 +02004142 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004143
4144 if (released)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01004145 offer_buffers(NULL, released);
Willy Tarreau787db9a2018-06-14 18:31:46 +02004146 }
Willy Tarreauea392822017-10-31 10:02:25 +01004147
Willy Tarreau4481e262019-10-31 15:36:30 +01004148 /* in any case this connection must not be considered idle anymore */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004149 if (h2c->conn->flags & CO_FL_LIST_MASK) {
4150 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004151 conn_delete_from_tree(&h2c->conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004152 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4153 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004154
Willy Tarreau0975f112018-03-29 15:22:59 +02004155 /* either we can release everything now or it will be done later once
4156 * the last stream closes.
4157 */
4158 if (eb_is_empty(&h2c->streams_by_id))
Christopher Faulet73c12072019-04-08 11:23:22 +02004159 h2_release(h2c);
Willy Tarreauea392822017-10-31 10:02:25 +01004160
Willy Tarreau7838a792019-08-12 18:42:03 +02004161 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreauea392822017-10-31 10:02:25 +01004162 return NULL;
4163}
4164
4165
Willy Tarreau62f52692017-10-08 23:01:42 +02004166/*******************************************/
4167/* functions below are used by the streams */
4168/*******************************************/
4169
4170/*
4171 * Attach a new stream to a connection
4172 * (Used for outgoing connections)
4173 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01004174static struct conn_stream *h2_attach(struct connection *conn, struct session *sess)
Willy Tarreau62f52692017-10-08 23:01:42 +02004175{
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004176 struct conn_stream *cs;
4177 struct h2s *h2s;
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004178 struct h2c *h2c = conn->ctx;
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004179
Willy Tarreau7838a792019-08-12 18:42:03 +02004180 TRACE_ENTER(H2_EV_H2S_NEW, conn);
Christopher Faulet236c93b2020-07-02 09:19:54 +02004181 cs = cs_new(conn, conn->target);
Willy Tarreau7838a792019-08-12 18:42:03 +02004182 if (!cs) {
4183 TRACE_DEVEL("leaving on CS allocation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004184 return NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004185 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01004186 h2s = h2c_bck_stream_new(h2c, cs, sess);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004187 if (!h2s) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004188 TRACE_DEVEL("leaving on stream creation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004189 cs_free(cs);
4190 return NULL;
4191 }
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004192
4193 /* the connection is not idle anymore, let's mark this */
4194 HA_ATOMIC_AND(&h2c->wait_event.tasklet->state, ~TASK_F_USR1);
Willy Tarreau4f8cd432021-03-02 17:27:58 +01004195 xprt_set_used(h2c->conn, h2c->conn->xprt, h2c->conn->xprt_ctx);
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004196
Willy Tarreau7838a792019-08-12 18:42:03 +02004197 TRACE_LEAVE(H2_EV_H2S_NEW, conn, h2s);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004198 return cs;
Willy Tarreau62f52692017-10-08 23:01:42 +02004199}
4200
Willy Tarreaufafd3982018-11-18 21:29:20 +01004201/* Retrieves the first valid conn_stream from this connection, or returns NULL.
4202 * We have to scan because we may have some orphan streams. It might be
4203 * beneficial to scan backwards from the end to reduce the likeliness to find
4204 * orphans.
4205 */
4206static const struct conn_stream *h2_get_first_cs(const struct connection *conn)
4207{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004208 struct h2c *h2c = conn->ctx;
Willy Tarreaufafd3982018-11-18 21:29:20 +01004209 struct h2s *h2s;
4210 struct eb32_node *node;
4211
4212 node = eb32_first(&h2c->streams_by_id);
4213 while (node) {
4214 h2s = container_of(node, struct h2s, by_id);
4215 if (h2s->cs)
4216 return h2s->cs;
4217 node = eb32_next(node);
4218 }
4219 return NULL;
4220}
4221
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004222static int h2_ctl(struct connection *conn, enum mux_ctl_type mux_ctl, void *output)
4223{
4224 int ret = 0;
4225 struct h2c *h2c = conn->ctx;
4226
4227 switch (mux_ctl) {
4228 case MUX_STATUS:
4229 /* Only consider the mux to be ready if we're done with
4230 * the preface and settings, and we had no error.
4231 */
4232 if (h2c->st0 >= H2_CS_FRAME_H && h2c->st0 < H2_CS_ERROR)
4233 ret |= MUX_STATUS_READY;
4234 return ret;
Christopher Faulet4c8ad842020-10-06 14:59:17 +02004235 case MUX_EXIT_STATUS:
4236 return MUX_ES_UNKNOWN;
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004237 default:
4238 return -1;
4239 }
4240}
4241
Willy Tarreau62f52692017-10-08 23:01:42 +02004242/*
Olivier Houchard060ed432018-11-06 16:32:42 +01004243 * Destroy the mux and the associated connection, if it is no longer used
4244 */
Christopher Faulet73c12072019-04-08 11:23:22 +02004245static void h2_destroy(void *ctx)
Olivier Houchard060ed432018-11-06 16:32:42 +01004246{
Christopher Faulet73c12072019-04-08 11:23:22 +02004247 struct h2c *h2c = ctx;
Olivier Houchard060ed432018-11-06 16:32:42 +01004248
Willy Tarreau7838a792019-08-12 18:42:03 +02004249 TRACE_ENTER(H2_EV_H2C_END, h2c->conn);
Christopher Faulet39a96ee2019-04-08 10:52:21 +02004250 if (eb_is_empty(&h2c->streams_by_id) || !h2c->conn || h2c->conn->ctx != h2c)
Christopher Faulet73c12072019-04-08 11:23:22 +02004251 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004252 TRACE_LEAVE(H2_EV_H2C_END);
Olivier Houchard060ed432018-11-06 16:32:42 +01004253}
4254
4255/*
Willy Tarreau62f52692017-10-08 23:01:42 +02004256 * Detach the stream from the connection and possibly release the connection.
4257 */
4258static void h2_detach(struct conn_stream *cs)
4259{
Willy Tarreau60935142017-10-16 18:11:19 +02004260 struct h2s *h2s = cs->ctx;
4261 struct h2c *h2c;
Olivier Houchardf502aca2018-12-14 19:42:40 +01004262 struct session *sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004263
Willy Tarreau7838a792019-08-12 18:42:03 +02004264 TRACE_ENTER(H2_EV_STRM_END, h2s ? h2s->h2c->conn : NULL, h2s);
4265
Willy Tarreau60935142017-10-16 18:11:19 +02004266 cs->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004267 if (!h2s) {
4268 TRACE_LEAVE(H2_EV_STRM_END);
Willy Tarreau60935142017-10-16 18:11:19 +02004269 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004270 }
Willy Tarreau60935142017-10-16 18:11:19 +02004271
Willy Tarreaud9464162020-01-10 18:25:07 +01004272 /* there's no txbuf so we're certain not to be able to send anything */
4273 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02004274
Olivier Houchardf502aca2018-12-14 19:42:40 +01004275 sess = h2s->sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004276 h2c = h2s->h2c;
4277 h2s->cs = NULL;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02004278 h2c->nb_cs--;
Willy Tarreaufa1d3572019-01-31 10:31:51 +01004279 if ((h2c->flags & (H2_CF_IS_BACK|H2_CF_DEM_TOOMANY)) == H2_CF_DEM_TOOMANY &&
4280 !h2_frt_has_too_many_cs(h2c)) {
4281 /* frontend connection was blocking new streams creation */
Willy Tarreauf2101912018-07-19 10:11:38 +02004282 h2c->flags &= ~H2_CF_DEM_TOOMANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004283 h2c_restart_reading(h2c, 1);
Willy Tarreauf2101912018-07-19 10:11:38 +02004284 }
Willy Tarreau60935142017-10-16 18:11:19 +02004285
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004286 /* this stream may be blocked waiting for some data to leave (possibly
4287 * an ES or RST frame), so orphan it in this case.
4288 */
Willy Tarreau3041fcc2018-03-29 15:41:32 +02004289 if (!(cs->conn->flags & CO_FL_ERROR) &&
Willy Tarreaua2b51812018-07-27 09:55:14 +02004290 (h2c->st0 < H2_CS_ERROR) &&
Willy Tarreau5723f292020-01-10 15:16:57 +01004291 (h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL)) &&
Willy Tarreauf96508a2020-01-10 11:12:48 +01004292 ((h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) || h2s->subs)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004293 TRACE_DEVEL("leaving on stream blocked", H2_EV_STRM_END|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004294 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004295 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004296
Willy Tarreau45f752e2017-10-30 15:44:59 +01004297 if ((h2c->flags & H2_CF_DEM_BLOCK_ANY && h2s->id == h2c->dsi) ||
4298 (h2c->flags & H2_CF_MUX_BLOCK_ANY && h2s->id == h2c->msi)) {
4299 /* unblock the connection if it was blocked on this
4300 * stream.
4301 */
4302 h2c->flags &= ~H2_CF_DEM_BLOCK_ANY;
4303 h2c->flags &= ~H2_CF_MUX_BLOCK_ANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004304 h2c_restart_reading(h2c, 1);
Willy Tarreau45f752e2017-10-30 15:44:59 +01004305 }
4306
Willy Tarreau71049cc2018-03-28 13:56:39 +02004307 h2s_destroy(h2s);
Willy Tarreau60935142017-10-16 18:11:19 +02004308
Christopher Faulet9b79a102019-07-15 11:22:56 +02004309 if (h2c->flags & H2_CF_IS_BACK) {
Olivier Houchard8a786902018-12-15 16:05:40 +01004310 if (!(h2c->conn->flags &
4311 (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH))) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004312 if (h2c->conn->flags & CO_FL_PRIVATE) {
Christopher Faulet08016ab2020-07-01 16:10:06 +02004313 /* Add the connection in the session server list, if not already done */
4314 if (!session_add_conn(sess, h2c->conn, h2c->conn->target)) {
4315 h2c->conn->owner = NULL;
4316 if (eb_is_empty(&h2c->streams_by_id)) {
4317 h2c->conn->mux->destroy(h2c);
4318 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4319 return;
Christopher Fauletc5579d12020-07-01 15:45:41 +02004320 }
4321 }
Christopher Faulet08016ab2020-07-01 16:10:06 +02004322 if (eb_is_empty(&h2c->streams_by_id)) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004323 if (session_check_idle_conn(h2c->conn->owner, h2c->conn) != 0) {
4324 /* At this point either the connection is destroyed, or it's been added to the server idle list, just stop */
4325 TRACE_DEVEL("leaving without reusable idle connection", H2_EV_STRM_END);
Olivier Houchard351411f2018-12-27 17:20:54 +01004326 return;
4327 }
4328 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004329 }
Christopher Fauletc5579d12020-07-01 15:45:41 +02004330 else {
4331 if (eb_is_empty(&h2c->streams_by_id)) {
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004332 /* If the connection is owned by the session, first remove it
4333 * from its list
4334 */
4335 if (h2c->conn->owner) {
4336 session_unown_conn(h2c->conn->owner, h2c->conn);
4337 h2c->conn->owner = NULL;
4338 }
4339
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004340 /* mark that the tasklet may lose its context to another thread and
4341 * that the handler needs to check it under the idle conns lock.
4342 */
4343 HA_ATOMIC_OR(&h2c->wait_event.tasklet->state, TASK_F_USR1);
Willy Tarreau4f8cd432021-03-02 17:27:58 +01004344 xprt_set_idle(h2c->conn, h2c->conn->xprt, h2c->conn->xprt_ctx);
4345
Olivier Houcharddc2f2752020-02-13 19:12:07 +01004346 if (!srv_add_to_idle_list(objt_server(h2c->conn->target), h2c->conn, 1)) {
Olivier Houchard2444aa52020-01-20 13:56:01 +01004347 /* The server doesn't want it, let's kill the connection right away */
4348 h2c->conn->mux->destroy(h2c);
4349 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4350 return;
4351 }
Olivier Houchard199d4fa2020-03-22 23:25:51 +01004352 /* At this point, the connection has been added to the
4353 * server idle list, so another thread may already have
4354 * hijacked it, so we can't do anything with it.
4355 */
Olivier Houchard2444aa52020-01-20 13:56:01 +01004356 TRACE_DEVEL("reusable idle connection", H2_EV_STRM_END);
4357 return;
Olivier Houchard8a786902018-12-15 16:05:40 +01004358
Olivier Houchard8a786902018-12-15 16:05:40 +01004359 }
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004360 else if (!h2c->conn->hash_node->node.node.leaf_p &&
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004361 h2_avail_streams(h2c->conn) > 0 && objt_server(h2c->conn->target) &&
Willy Tarreau2b718102021-04-21 07:32:39 +02004362 !LIST_INLIST(&h2c->conn->session_list)) {
Willy Tarreau430bf4a2021-03-04 09:45:32 +01004363 ebmb_insert(&__objt_server(h2c->conn->target)->per_thr[tid].avail_conns,
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004364 &h2c->conn->hash_node->node,
4365 sizeof(h2c->conn->hash_node->hash));
Christopher Fauletc5579d12020-07-01 15:45:41 +02004366 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004367 }
4368 }
4369 }
4370
Willy Tarreaue323f342018-03-28 13:51:45 +02004371 /* We don't want to close right now unless we're removing the
4372 * last stream, and either the connection is in error, or it
4373 * reached the ID already specified in a GOAWAY frame received
4374 * or sent (as seen by last_sid >= 0).
4375 */
Olivier Houchard7a977432019-03-21 15:47:13 +01004376 if (h2c_is_dead(h2c)) {
Willy Tarreaue323f342018-03-28 13:51:45 +02004377 /* no more stream will come, kill it now */
Willy Tarreau7838a792019-08-12 18:42:03 +02004378 TRACE_DEVEL("leaving and killing dead connection", H2_EV_STRM_END, h2c->conn);
Christopher Faulet73c12072019-04-08 11:23:22 +02004379 h2_release(h2c);
Willy Tarreaue323f342018-03-28 13:51:45 +02004380 }
4381 else if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02004382 if (h2c_may_expire(h2c))
4383 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
4384 else
4385 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02004386 task_queue(h2c->task);
Willy Tarreau7838a792019-08-12 18:42:03 +02004387 TRACE_DEVEL("leaving, refreshing connection's timeout", H2_EV_STRM_END, h2c->conn);
Willy Tarreau60935142017-10-16 18:11:19 +02004388 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004389 else
4390 TRACE_DEVEL("leaving", H2_EV_STRM_END, h2c->conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02004391}
4392
Willy Tarreau88bdba32019-05-13 18:17:53 +02004393/* Performs a synchronous or asynchronous shutr(). */
4394static void h2_do_shutr(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004395{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004396 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004397
Willy Tarreauf983d002019-05-14 10:40:21 +02004398 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004399 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004400
Willy Tarreau7838a792019-08-12 18:42:03 +02004401 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4402
Willy Tarreau18059042019-01-31 19:12:48 +01004403 /* a connstream may require us to immediately kill the whole connection
4404 * for example because of a "tcp-request content reject" rule that is
4405 * normally used to limit abuse. In this case we schedule a goaway to
4406 * close the connection.
Willy Tarreau926fa4c2017-11-07 14:42:12 +01004407 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004408 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004409 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004410 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004411 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4412 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4413 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004414 else if (!(h2s->flags & H2_SF_HEADERS_SENT)) {
4415 /* Nothing was never sent for this stream, so reset with
4416 * REFUSED_STREAM error to let the client retry the
4417 * request.
4418 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004419 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004420 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4421 }
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004422 else {
4423 /* a final response was already provided, we don't want this
4424 * stream anymore. This may happen when the server responds
4425 * before the end of an upload and closes quickly (redirect,
4426 * deny, ...)
4427 */
4428 h2s_error(h2s, H2_ERR_CANCEL);
4429 }
Willy Tarreau18059042019-01-31 19:12:48 +01004430
Willy Tarreau90c32322017-11-24 08:00:30 +01004431 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004432 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004433 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004434
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004435 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004436 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau00dd0782018-03-01 16:31:34 +01004437 h2s_close(h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004438 done:
4439 h2s->flags &= ~H2_SF_WANT_SHUTR;
Willy Tarreau7838a792019-08-12 18:42:03 +02004440 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004441 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004442add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004443 /* Let the handler know we want to shutr, and add ourselves to the
4444 * most relevant list if not yet done. h2_deferred_shut() will be
4445 * automatically called via the shut_tl tasklet when there's room
4446 * again.
4447 */
4448 h2s->flags |= H2_SF_WANT_SHUTR;
Willy Tarreau2b718102021-04-21 07:32:39 +02004449 if (!LIST_INLIST(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004450 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02004451 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004452 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Willy Tarreau2b718102021-04-21 07:32:39 +02004453 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004454 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004455 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004456 return;
Willy Tarreau62f52692017-10-08 23:01:42 +02004457}
4458
Willy Tarreau88bdba32019-05-13 18:17:53 +02004459/* Performs a synchronous or asynchronous shutw(). */
4460static void h2_do_shutw(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004461{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004462 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004463
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004464 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004465 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004466
Willy Tarreau7838a792019-08-12 18:42:03 +02004467 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4468
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004469 if (h2s->st != H2_SS_ERROR && (h2s->flags & H2_SF_HEADERS_SENT)) {
Willy Tarreau58e32082017-11-07 14:41:09 +01004470 /* we can cleanly close using an empty data frame only after headers */
4471
4472 if (!(h2s->flags & (H2_SF_ES_SENT|H2_SF_RST_SENT)) &&
4473 h2_send_empty_data_es(h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004474 goto add_to_list;
Willy Tarreau58e32082017-11-07 14:41:09 +01004475
4476 if (h2s->st == H2_SS_HREM)
Willy Tarreau00dd0782018-03-01 16:31:34 +01004477 h2s_close(h2s);
Willy Tarreau58e32082017-11-07 14:41:09 +01004478 else
4479 h2s->st = H2_SS_HLOC;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004480 } else {
Willy Tarreau18059042019-01-31 19:12:48 +01004481 /* a connstream may require us to immediately kill the whole connection
4482 * for example because of a "tcp-request content reject" rule that is
4483 * normally used to limit abuse. In this case we schedule a goaway to
4484 * close the connection.
Willy Tarreaua1349f02017-10-31 07:41:55 +01004485 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004486 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004487 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004488 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004489 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4490 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4491 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004492 else {
4493 /* Nothing was never sent for this stream, so reset with
4494 * REFUSED_STREAM error to let the client retry the
4495 * request.
4496 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004497 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004498 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4499 }
Willy Tarreau18059042019-01-31 19:12:48 +01004500
Willy Tarreau90c32322017-11-24 08:00:30 +01004501 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004502 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004503 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004504
Willy Tarreau00dd0782018-03-01 16:31:34 +01004505 h2s_close(h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004506 }
4507
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004508 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004509 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau7838a792019-08-12 18:42:03 +02004510
4511 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
4512
Willy Tarreau88bdba32019-05-13 18:17:53 +02004513 done:
4514 h2s->flags &= ~H2_SF_WANT_SHUTW;
4515 return;
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004516
4517 add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004518 /* Let the handler know we want to shutw, and add ourselves to the
4519 * most relevant list if not yet done. h2_deferred_shut() will be
4520 * automatically called via the shut_tl tasklet when there's room
4521 * again.
4522 */
4523 h2s->flags |= H2_SF_WANT_SHUTW;
Willy Tarreau2b718102021-04-21 07:32:39 +02004524 if (!LIST_INLIST(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004525 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02004526 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004527 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Willy Tarreau2b718102021-04-21 07:32:39 +02004528 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004529 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004530 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004531 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004532}
4533
Willy Tarreau5723f292020-01-10 15:16:57 +01004534/* This is the tasklet referenced in h2s->shut_tl, it is used for
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004535 * deferred shutdowns when the h2_detach() was done but the mux buffer was full
4536 * and prevented the last frame from being emitted.
4537 */
Willy Tarreau144f84a2021-03-02 16:09:26 +01004538struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned int state)
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004539{
4540 struct h2s *h2s = ctx;
Willy Tarreau88bdba32019-05-13 18:17:53 +02004541 struct h2c *h2c = h2s->h2c;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004542
Willy Tarreau7838a792019-08-12 18:42:03 +02004543 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4544
Willy Tarreau5723f292020-01-10 15:16:57 +01004545 if (h2s->flags & H2_SF_NOTIFIED) {
4546 /* some data processing remains to be done first */
4547 goto end;
4548 }
4549
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004550 if (h2s->flags & H2_SF_WANT_SHUTW)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004551 h2_do_shutw(h2s);
4552
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004553 if (h2s->flags & H2_SF_WANT_SHUTR)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004554 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004555
Willy Tarreau88bdba32019-05-13 18:17:53 +02004556 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004557 /* We're done trying to send, remove ourself from the send_list */
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004558 LIST_DEL_INIT(&h2s->list);
Olivier Houchard7a977432019-03-21 15:47:13 +01004559
Willy Tarreau88bdba32019-05-13 18:17:53 +02004560 if (!h2s->cs) {
4561 h2s_destroy(h2s);
Willy Tarreau74163142021-03-13 11:30:19 +01004562 if (h2c_is_dead(h2c)) {
Willy Tarreau88bdba32019-05-13 18:17:53 +02004563 h2_release(h2c);
Willy Tarreau74163142021-03-13 11:30:19 +01004564 t = NULL;
4565 }
Willy Tarreau88bdba32019-05-13 18:17:53 +02004566 }
Olivier Houchard7a977432019-03-21 15:47:13 +01004567 }
Willy Tarreau5723f292020-01-10 15:16:57 +01004568 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02004569 TRACE_LEAVE(H2_EV_STRM_SHUT);
Willy Tarreau74163142021-03-13 11:30:19 +01004570 return t;
Willy Tarreau62f52692017-10-08 23:01:42 +02004571}
4572
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004573/* shutr() called by the conn_stream (mux_ops.shutr) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004574static void h2_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
4575{
4576 struct h2s *h2s = cs->ctx;
4577
Willy Tarreau7838a792019-08-12 18:42:03 +02004578 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004579 if (cs->flags & CS_FL_KILL_CONN)
4580 h2s->flags |= H2_SF_KILL_CONN;
4581
Willy Tarreau7838a792019-08-12 18:42:03 +02004582 if (mode)
4583 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004584
Willy Tarreau7838a792019-08-12 18:42:03 +02004585 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004586}
4587
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004588/* shutw() called by the conn_stream (mux_ops.shutw) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004589static void h2_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
4590{
4591 struct h2s *h2s = cs->ctx;
4592
Willy Tarreau7838a792019-08-12 18:42:03 +02004593 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004594 if (cs->flags & CS_FL_KILL_CONN)
4595 h2s->flags |= H2_SF_KILL_CONN;
4596
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004597 h2_do_shutw(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02004598 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004599}
4600
Christopher Faulet9b79a102019-07-15 11:22:56 +02004601/* Decode the payload of a HEADERS frame and produce the HTX request or response
4602 * depending on the connection's side. Returns a positive value on success, a
4603 * negative value on failure, or 0 if it couldn't proceed. May report connection
4604 * errors in h2c->errcode if the frame is non-decodable and the connection
4605 * unrecoverable. In absence of connection error when a failure is reported, the
4606 * caller must assume a stream error.
Willy Tarreauea18f862018-12-22 20:19:26 +01004607 *
4608 * The function may fold CONTINUATION frames into the initial HEADERS frame
4609 * by removing padding and next frame header, then moving the CONTINUATION
4610 * frame's payload and adjusting h2c->dfl to match the new aggregated frame,
4611 * leaving a hole between the main frame and the beginning of the next one.
4612 * The possibly remaining incomplete or next frame at the end may be moved
4613 * if the aggregated frame is not deleted, in order to fill the hole. Wrapped
4614 * HEADERS frames are unwrapped into a temporary buffer before decoding.
4615 *
4616 * A buffer at the beginning of processing may look like this :
4617 *
4618 * ,---.---------.-----.--------------.--------------.------.---.
4619 * |///| HEADERS | PAD | CONTINUATION | CONTINUATION | DATA |///|
4620 * `---^---------^-----^--------------^--------------^------^---'
4621 * | | <-----> | |
4622 * area | dpl | wrap
4623 * |<--------------> |
4624 * | dfl |
4625 * |<-------------------------------------------------->|
4626 * head data
4627 *
4628 * Padding is automatically overwritten when folding, participating to the
4629 * hole size after dfl :
4630 *
4631 * ,---.------------------------.-----.--------------.------.---.
4632 * |///| HEADERS : CONTINUATION |/////| CONTINUATION | DATA |///|
4633 * `---^------------------------^-----^--------------^------^---'
4634 * | | <-----> | |
4635 * area | hole | wrap
4636 * |<-----------------------> |
4637 * | dfl |
4638 * |<-------------------------------------------------->|
4639 * head data
4640 *
4641 * Please note that the HEADERS frame is always deprived from its PADLEN byte
4642 * however it may start with the 5 stream-dep+weight bytes in case of PRIORITY
4643 * bit.
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004644 *
4645 * The <flags> field must point to either the stream's flags or to a copy of it
4646 * so that the function can update the following flags :
4647 * - H2_SF_DATA_CLEN when content-length is seen
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004648 * - H2_SF_HEADERS_RCVD once the frame is successfully decoded
Willy Tarreau88d138e2019-01-02 19:38:14 +01004649 *
4650 * The H2_SF_HEADERS_RCVD flag is also looked at in the <flags> field prior to
4651 * decoding, in order to detect if we're dealing with a headers or a trailers
4652 * block (the trailers block appears after H2_SF_HEADERS_RCVD was seen).
Willy Tarreau13278b42017-10-13 19:23:14 +02004653 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01004654static int h2c_decode_headers(struct h2c *h2c, struct buffer *rxbuf, uint32_t *flags, unsigned long long *body_len, char *upgrade_protocol)
Willy Tarreau13278b42017-10-13 19:23:14 +02004655{
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004656 const uint8_t *hdrs = (uint8_t *)b_head(&h2c->dbuf);
Willy Tarreau83061a82018-07-13 11:56:34 +02004657 struct buffer *tmp = get_trash_chunk();
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004658 struct http_hdr list[global.tune.max_http_hdr * 2];
Willy Tarreau83061a82018-07-13 11:56:34 +02004659 struct buffer *copy = NULL;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004660 unsigned int msgf;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004661 struct htx *htx = NULL;
Willy Tarreauea18f862018-12-22 20:19:26 +01004662 int flen; // header frame len
4663 int hole = 0;
Willy Tarreau86277d42019-01-02 15:36:11 +01004664 int ret = 0;
4665 int outlen;
Willy Tarreau13278b42017-10-13 19:23:14 +02004666 int wrap;
Willy Tarreau13278b42017-10-13 19:23:14 +02004667
Willy Tarreau7838a792019-08-12 18:42:03 +02004668 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
4669
Willy Tarreauea18f862018-12-22 20:19:26 +01004670next_frame:
4671 if (b_data(&h2c->dbuf) - hole < h2c->dfl)
4672 goto leave; // incomplete input frame
4673
4674 /* No END_HEADERS means there's one or more CONTINUATION frames. In
4675 * this case, we'll try to paste it immediately after the initial
4676 * HEADERS frame payload and kill any possible padding. The initial
4677 * frame's length will be increased to represent the concatenation
4678 * of the two frames. The next frame is read from position <tlen>
4679 * and written at position <flen> (minus padding if some is present).
4680 */
4681 if (unlikely(!(h2c->dff & H2_F_HEADERS_END_HEADERS))) {
4682 struct h2_fh hdr;
4683 int clen; // CONTINUATION frame's payload length
4684
Willy Tarreau7838a792019-08-12 18:42:03 +02004685 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 +01004686 if (!h2_peek_frame_hdr(&h2c->dbuf, h2c->dfl + hole, &hdr)) {
4687 /* no more data, the buffer may be full, either due to
4688 * too large a frame or because of too large a hole that
4689 * we're going to compact at the end.
4690 */
4691 goto leave;
4692 }
4693
4694 if (hdr.ft != H2_FT_CONTINUATION) {
4695 /* RFC7540#6.10: frame of unexpected type */
Willy Tarreau7838a792019-08-12 18:42:03 +02004696 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 +01004697 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004698 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreauea18f862018-12-22 20:19:26 +01004699 goto fail;
4700 }
4701
4702 if (hdr.sid != h2c->dsi) {
4703 /* RFC7540#6.10: frame of different stream */
Willy Tarreau7838a792019-08-12 18:42:03 +02004704 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 +01004705 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004706 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreauea18f862018-12-22 20:19:26 +01004707 goto fail;
4708 }
4709
4710 if ((unsigned)hdr.len > (unsigned)global.tune.bufsize) {
4711 /* RFC7540#4.2: invalid frame length */
Willy Tarreau7838a792019-08-12 18:42:03 +02004712 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 +01004713 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4714 goto fail;
4715 }
4716
4717 /* detect when we must stop aggragating frames */
4718 h2c->dff |= hdr.ff & H2_F_HEADERS_END_HEADERS;
4719
4720 /* Take as much as we can of the CONTINUATION frame's payload */
4721 clen = b_data(&h2c->dbuf) - (h2c->dfl + hole + 9);
4722 if (clen > hdr.len)
4723 clen = hdr.len;
4724
4725 /* Move the frame's payload over the padding, hole and frame
4726 * header. At least one of hole or dpl is null (see diagrams
4727 * above). The hole moves after the new aggragated frame.
4728 */
4729 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole + 9), clen, -(h2c->dpl + hole + 9));
Christopher Fauletcb1847c2021-04-21 11:11:21 +02004730 h2c->dfl += hdr.len - h2c->dpl;
Willy Tarreauea18f862018-12-22 20:19:26 +01004731 hole += h2c->dpl + 9;
4732 h2c->dpl = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004733 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 +01004734 goto next_frame;
4735 }
4736
4737 flen = h2c->dfl - h2c->dpl;
Willy Tarreau68472622017-12-11 18:36:37 +01004738
Willy Tarreau13278b42017-10-13 19:23:14 +02004739 /* if the input buffer wraps, take a temporary copy of it (rare) */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004740 wrap = b_wrap(&h2c->dbuf) - b_head(&h2c->dbuf);
Willy Tarreau13278b42017-10-13 19:23:14 +02004741 if (wrap < h2c->dfl) {
Willy Tarreau68dd9852017-07-03 14:44:26 +02004742 copy = alloc_trash_chunk();
4743 if (!copy) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004744 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 +02004745 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
4746 goto fail;
4747 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004748 memcpy(copy->area, b_head(&h2c->dbuf), wrap);
4749 memcpy(copy->area + wrap, b_orig(&h2c->dbuf), h2c->dfl - wrap);
4750 hdrs = (uint8_t *) copy->area;
Willy Tarreau13278b42017-10-13 19:23:14 +02004751 }
4752
Willy Tarreau13278b42017-10-13 19:23:14 +02004753 /* Skip StreamDep and weight for now (we don't support PRIORITY) */
4754 if (h2c->dff & H2_F_HEADERS_PRIORITY) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004755 if (read_n32(hdrs) == h2c->dsi) {
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004756 /* RFC7540#5.3.1 : stream dep may not depend on itself */
Willy Tarreau7838a792019-08-12 18:42:03 +02004757 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 +01004758 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004759 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreaua0d11b62018-09-05 18:30:05 +02004760 goto fail;
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004761 }
4762
Willy Tarreaua01f45e2018-12-31 07:41:24 +01004763 if (flen < 5) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004764 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 +01004765 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4766 goto fail;
4767 }
4768
Willy Tarreau13278b42017-10-13 19:23:14 +02004769 hdrs += 5; // stream dep = 4, weight = 1
4770 flen -= 5;
4771 }
4772
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004773 if (!h2_get_buf(h2c, rxbuf)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004774 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 +01004775 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau86277d42019-01-02 15:36:11 +01004776 goto leave;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004777 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004778
Willy Tarreau937f7602018-02-26 15:22:17 +01004779 /* we can't retry a failed decompression operation so we must be very
4780 * careful not to take any risks. In practice the output buffer is
4781 * always empty except maybe for trailers, in which case we simply have
4782 * to wait for the upper layer to finish consuming what is available.
4783 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004784 htx = htx_from_buf(rxbuf);
4785 if (!htx_is_empty(htx)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004786 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 +02004787 h2c->flags |= H2_CF_DEM_SFULL;
4788 goto leave;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004789 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004790
Willy Tarreau25919232019-01-03 14:48:18 +01004791 /* past this point we cannot roll back in case of error */
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004792 outlen = hpack_decode_frame(h2c->ddht, hdrs, flen, list,
4793 sizeof(list)/sizeof(list[0]), tmp);
4794 if (outlen < 0) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004795 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 +01004796 h2c_error(h2c, H2_ERR_COMPRESSION_ERROR);
4797 goto fail;
4798 }
4799
Willy Tarreau25919232019-01-03 14:48:18 +01004800 /* The PACK decompressor was updated, let's update the input buffer and
4801 * the parser's state to commit these changes and allow us to later
4802 * fail solely on the stream if needed.
4803 */
4804 b_del(&h2c->dbuf, h2c->dfl + hole);
4805 h2c->dfl = hole = 0;
4806 h2c->st0 = H2_CS_FRAME_H;
4807
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004808 /* OK now we have our header list in <list> */
Willy Tarreau880f5802019-01-03 08:10:14 +01004809 msgf = (h2c->dff & H2_F_HEADERS_END_STREAM) ? 0 : H2_MSGF_BODY;
Christopher Fauletd0db4232021-01-22 11:46:30 +01004810 msgf |= (*flags & H2_SF_BODY_TUNNEL) ? H2_MSGF_BODY_TUNNEL: 0;
Amaury Denoyelle74162742020-12-11 17:53:05 +01004811 /* If an Extended CONNECT has been sent on this stream, set message flag
Ilya Shipitsinacf84592021-02-06 22:29:08 +05004812 * to convert 200 response to 101 htx response */
Amaury Denoyelle74162742020-12-11 17:53:05 +01004813 msgf |= (*flags & H2_SF_EXT_CONNECT_SENT) ? H2_MSGF_EXT_CONNECT: 0;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004814
Willy Tarreau88d138e2019-01-02 19:38:14 +01004815 if (*flags & H2_SF_HEADERS_RCVD)
4816 goto trailers;
4817
4818 /* This is the first HEADERS frame so it's a headers block */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004819 if (h2c->flags & H2_CF_IS_BACK)
Amaury Denoyelle74162742020-12-11 17:53:05 +01004820 outlen = h2_make_htx_response(list, htx, &msgf, body_len, upgrade_protocol);
Christopher Faulet9b79a102019-07-15 11:22:56 +02004821 else
4822 outlen = h2_make_htx_request(list, htx, &msgf, body_len);
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004823
Christopher Faulet3d875582021-04-26 17:46:13 +02004824 if (outlen < 0 || htx_free_space(htx) < global.tune.maxrewrite) {
Willy Tarreau25919232019-01-03 14:48:18 +01004825 /* too large headers? this is a stream error only */
Christopher Faulet3d875582021-04-26 17:46:13 +02004826 TRACE_STATE("message headers too large", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2S_ERR|H2_EV_PROTO_ERR, h2c->conn);
4827 htx->flags |= HTX_FL_PARSING_ERROR;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004828 goto fail;
4829 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004830
Willy Tarreau174b06a2018-04-25 18:13:58 +02004831 if (msgf & H2_MSGF_BODY) {
4832 /* a payload is present */
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004833 if (msgf & H2_MSGF_BODY_CL) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004834 *flags |= H2_SF_DATA_CLEN;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004835 htx->extra = *body_len;
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004836 }
Willy Tarreau174b06a2018-04-25 18:13:58 +02004837 }
Christopher Faulet7d247f02020-12-02 14:26:36 +01004838 if (msgf & H2_MSGF_BODYLESS_RSP)
4839 *flags |= H2_SF_BODYLESS_RESP;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004840
Christopher Fauletd0db4232021-01-22 11:46:30 +01004841 if (msgf & H2_MSGF_BODY_TUNNEL)
4842 *flags |= H2_SF_BODY_TUNNEL;
4843 else {
4844 /* Abort the tunnel attempt, if any */
4845 if (*flags & H2_SF_BODY_TUNNEL)
4846 *flags |= H2_SF_TUNNEL_ABRT;
4847 *flags &= ~H2_SF_BODY_TUNNEL;
4848 }
4849
Willy Tarreau88d138e2019-01-02 19:38:14 +01004850 done:
Christopher Faulet0b465482019-02-19 15:14:23 +01004851 /* indicate that a HEADERS frame was received for this stream, except
4852 * for 1xx responses. For 1xx responses, another HEADERS frame is
4853 * expected.
4854 */
4855 if (!(msgf & H2_MSGF_RSP_1XX))
4856 *flags |= H2_SF_HEADERS_RCVD;
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004857
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004858 if (h2c->dff & H2_F_HEADERS_END_STREAM) {
4859 /* no more data are expected for this message */
4860 htx->flags |= HTX_FL_EOM;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004861 }
Willy Tarreau937f7602018-02-26 15:22:17 +01004862
Amaury Denoyelleefe22762020-12-11 17:53:08 +01004863 if (msgf & H2_MSGF_EXT_CONNECT)
4864 *flags |= H2_SF_EXT_CONNECT_RCVD;
4865
Willy Tarreau86277d42019-01-02 15:36:11 +01004866 /* success */
4867 ret = 1;
4868
Willy Tarreau68dd9852017-07-03 14:44:26 +02004869 leave:
Willy Tarreau86277d42019-01-02 15:36:11 +01004870 /* If there is a hole left and it's not at the end, we are forced to
Willy Tarreauea18f862018-12-22 20:19:26 +01004871 * move the remaining data over it.
4872 */
4873 if (hole) {
4874 if (b_data(&h2c->dbuf) > h2c->dfl + hole)
4875 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole),
4876 b_data(&h2c->dbuf) - (h2c->dfl + hole), -hole);
4877 b_sub(&h2c->dbuf, hole);
4878 }
4879
Christopher Faulet07f88d72021-04-21 10:39:53 +02004880 if (b_full(&h2c->dbuf) && h2c->dfl) {
Willy Tarreauea18f862018-12-22 20:19:26 +01004881 /* too large frames */
4882 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau86277d42019-01-02 15:36:11 +01004883 ret = -1;
Willy Tarreauea18f862018-12-22 20:19:26 +01004884 }
4885
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004886 if (htx)
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004887 htx_to_buf(htx, rxbuf);
Willy Tarreau68dd9852017-07-03 14:44:26 +02004888 free_trash_chunk(copy);
Willy Tarreau7838a792019-08-12 18:42:03 +02004889 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau86277d42019-01-02 15:36:11 +01004890 return ret;
4891
Willy Tarreau68dd9852017-07-03 14:44:26 +02004892 fail:
Willy Tarreau86277d42019-01-02 15:36:11 +01004893 ret = -1;
Willy Tarreau68dd9852017-07-03 14:44:26 +02004894 goto leave;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004895
4896 trailers:
4897 /* This is the last HEADERS frame hence a trailer */
Willy Tarreau88d138e2019-01-02 19:38:14 +01004898 if (!(h2c->dff & H2_F_HEADERS_END_STREAM)) {
4899 /* It's a trailer but it's missing ES flag */
Willy Tarreau7838a792019-08-12 18:42:03 +02004900 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 +01004901 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004902 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau88d138e2019-01-02 19:38:14 +01004903 goto fail;
4904 }
4905
Christopher Faulet9b79a102019-07-15 11:22:56 +02004906 /* Trailers terminate a DATA sequence */
Willy Tarreau7838a792019-08-12 18:42:03 +02004907 if (h2_make_htx_trailers(list, htx) <= 0) {
4908 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 +02004909 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004910 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01004911 goto done;
Willy Tarreau13278b42017-10-13 19:23:14 +02004912}
4913
Christopher Faulet9b79a102019-07-15 11:22:56 +02004914/* Transfer the payload of a DATA frame to the HTTP/1 side. The HTTP/2 frame
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004915 * parser state is automatically updated. Returns > 0 if it could completely
4916 * send the current frame, 0 if it couldn't complete, in which case
4917 * CS_FL_RCV_MORE must be checked to know if some data remain pending (an empty
4918 * DATA frame can return 0 as a valid result). Stream errors are reported in
4919 * h2s->errcode and connection errors in h2c->errcode. The caller must already
4920 * have checked the frame header and ensured that the frame was complete or the
4921 * buffer full. It changes the frame state to FRAME_A once done.
Willy Tarreau454f9052017-10-26 19:40:35 +02004922 */
Willy Tarreau454b57b2018-02-26 15:50:05 +01004923static int h2_frt_transfer_data(struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02004924{
4925 struct h2c *h2c = h2s->h2c;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004926 int block;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004927 unsigned int flen = 0;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004928 struct htx *htx = NULL;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004929 struct buffer *csbuf;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004930 unsigned int sent;
Willy Tarreau454f9052017-10-26 19:40:35 +02004931
Willy Tarreau7838a792019-08-12 18:42:03 +02004932 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
4933
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004934 h2c->flags &= ~H2_CF_DEM_SFULL;
Willy Tarreau454f9052017-10-26 19:40:35 +02004935
Olivier Houchard638b7992018-08-16 15:41:52 +02004936 csbuf = h2_get_buf(h2c, &h2s->rxbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004937 if (!csbuf) {
4938 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02004939 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 +01004940 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004941 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004942 htx = htx_from_buf(csbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004943
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004944try_again:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004945 flen = h2c->dfl - h2c->dpl;
4946 if (!flen)
Willy Tarreau4a28da12018-01-04 14:41:00 +01004947 goto end_transfer;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004948
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004949 if (flen > b_data(&h2c->dbuf)) {
4950 flen = b_data(&h2c->dbuf);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004951 if (!flen)
Willy Tarreau454b57b2018-02-26 15:50:05 +01004952 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004953 }
4954
Christopher Faulet9b79a102019-07-15 11:22:56 +02004955 block = htx_free_data_space(htx);
4956 if (!block) {
4957 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004958 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 +02004959 goto fail;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004960 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004961 if (flen > block)
4962 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004963
Christopher Faulet9b79a102019-07-15 11:22:56 +02004964 /* here, flen is the max we can copy into the output buffer */
4965 block = b_contig_data(&h2c->dbuf, 0);
4966 if (flen > block)
4967 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004968
Christopher Faulet9b79a102019-07-15 11:22:56 +02004969 sent = htx_add_data(htx, ist2(b_head(&h2c->dbuf), flen));
Willy Tarreau022e5e52020-09-10 09:33:15 +02004970 TRACE_DATA("move some data to h2s rxbuf", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s, 0, (void *)(long)sent);
Willy Tarreau454f9052017-10-26 19:40:35 +02004971
Christopher Faulet9b79a102019-07-15 11:22:56 +02004972 b_del(&h2c->dbuf, sent);
4973 h2c->dfl -= sent;
4974 h2c->rcvd_c += sent;
4975 h2c->rcvd_s += sent; // warning, this can also affect the closed streams!
Willy Tarreau454f9052017-10-26 19:40:35 +02004976
Christopher Faulet9b79a102019-07-15 11:22:56 +02004977 if (h2s->flags & H2_SF_DATA_CLEN) {
4978 h2s->body_len -= sent;
4979 htx->extra = h2s->body_len;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004980 }
4981
Christopher Faulet9b79a102019-07-15 11:22:56 +02004982 if (sent < flen) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01004983 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004984 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 +01004985 goto fail;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004986 }
4987
Christopher Faulet9b79a102019-07-15 11:22:56 +02004988 goto try_again;
4989
Willy Tarreau4a28da12018-01-04 14:41:00 +01004990 end_transfer:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004991 /* here we're done with the frame, all the payload (except padding) was
4992 * transferred.
4993 */
Willy Tarreaueba10f22018-04-25 20:44:22 +02004994
Christopher Faulet5be651d2021-01-22 15:28:03 +01004995 if (!(h2s->flags & H2_SF_BODY_TUNNEL) && (h2c->dff & H2_F_DATA_END_STREAM)) {
4996 /* no more data are expected for this message. This add the EOM
4997 * flag but only on the response path or if no tunnel attempt
4998 * was aborted. Otherwise (request path + tunnel abrted), the
4999 * EOM was already reported.
5000 */
Christopher Faulet33724322021-02-10 09:04:59 +01005001 if ((h2c->flags & H2_CF_IS_BACK) || !(h2s->flags & H2_SF_TUNNEL_ABRT)) {
5002 /* If we receive an empty DATA frame with ES flag while the HTX
5003 * message is empty, we must be sure to push a block to be sure
5004 * the HTX EOM flag will be handled on the other side. It is a
5005 * workaround because for now it is not possible to push empty
5006 * HTX DATA block. And without this block, there is no way to
5007 * "commit" the end of the message.
5008 */
5009 if (htx_is_empty(htx)) {
5010 if (!htx_add_endof(htx, HTX_BLK_EOT))
5011 goto fail;
5012 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005013 htx->flags |= HTX_FL_EOM;
Christopher Faulet33724322021-02-10 09:04:59 +01005014 }
Willy Tarreaueba10f22018-04-25 20:44:22 +02005015 }
5016
Willy Tarreaud1023bb2018-03-22 16:53:12 +01005017 h2c->rcvd_c += h2c->dpl;
5018 h2c->rcvd_s += h2c->dpl;
5019 h2c->dpl = 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02005020 h2c->st0 = H2_CS_FRAME_A; // send the corresponding window update
Christopher Faulet9b79a102019-07-15 11:22:56 +02005021 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02005022 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005023 return 1;
Willy Tarreau454b57b2018-02-26 15:50:05 +01005024 fail:
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005025 if (htx)
5026 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02005027 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454b57b2018-02-26 15:50:05 +01005028 return 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02005029}
5030
Willy Tarreau115e83b2018-12-01 19:17:53 +01005031/* Try to send a HEADERS frame matching HTX response present in HTX message
5032 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
5033 * must check the stream's status to detect any error which might have happened
5034 * subsequently to a successful send. The htx blocks are automatically removed
5035 * from the message. The htx message is assumed to be valid since produced from
5036 * the internal code, hence it contains a start line, an optional series of
5037 * header blocks and an end of header, otherwise an invalid frame could be
5038 * emitted and the resulting htx message could be left in an inconsistent state.
5039 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005040static size_t h2s_frt_make_resp_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005041{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005042 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau115e83b2018-12-01 19:17:53 +01005043 struct h2c *h2c = h2s->h2c;
5044 struct htx_blk *blk;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005045 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005046 struct buffer *mbuf;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005047 struct htx_sl *sl;
5048 enum htx_blk_type type;
5049 int es_now = 0;
5050 int ret = 0;
5051 int hdr;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005052
Willy Tarreau7838a792019-08-12 18:42:03 +02005053 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5054
Willy Tarreau115e83b2018-12-01 19:17:53 +01005055 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005056 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005057 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005058 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005059 return 0;
5060 }
5061
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005062 /* get the start line (we do have one) and the rest of the headers,
5063 * that we dump starting at header 0 */
5064 sl = NULL;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005065 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005066 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau115e83b2018-12-01 19:17:53 +01005067 type = htx_get_blk_type(blk);
5068
5069 if (type == HTX_BLK_UNUSED)
5070 continue;
5071
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005072 if (type == HTX_BLK_EOH)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005073 break;
5074
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005075 if (type == HTX_BLK_HDR) {
Christopher Faulet56498132021-01-29 11:39:43 +01005076 BUG_ON(!sl); /* The start-line mut be defined before any headers */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005077 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5078 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5079 goto fail;
5080 }
5081
5082 list[hdr].n = htx_get_blk_name(htx, blk);
5083 list[hdr].v = htx_get_blk_value(htx, blk);
5084 hdr++;
5085 }
5086 else if (type == HTX_BLK_RES_SL) {
Christopher Faulet56498132021-01-29 11:39:43 +01005087 BUG_ON(sl); /* Only one start-line expected */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005088 sl = htx_get_blk_ptr(htx, blk);
5089 h2s->status = sl->info.res.status;
Christopher Faulet7d247f02020-12-02 14:26:36 +01005090 if (h2s->status == 204 || h2s->status == 304)
5091 h2s->flags |= H2_SF_BODYLESS_RESP;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005092 if (h2s->status < 100 || h2s->status > 999) {
5093 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5094 goto fail;
5095 }
5096 else if (h2s->status == 101) {
Amaury Denoyelleefe22762020-12-11 17:53:08 +01005097 if (unlikely(h2s->flags & H2_SF_EXT_CONNECT_RCVD)) {
5098 /* If an Extended CONNECT has been received, we need to convert 101 to 200 */
5099 h2s->status = 200;
5100 h2s->flags &= ~H2_SF_EXT_CONNECT_RCVD;
5101 }
5102 else {
5103 /* Otherwise, 101 responses are not supported in H2, so return a error (RFC7540#8.1.1) */
5104 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5105 goto fail;
5106 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005107 }
5108 else if ((h2s->flags & H2_SF_BODY_TUNNEL) && h2s->status >= 300) {
5109 /* Abort the tunnel attempt */
5110 h2s->flags &= ~H2_SF_BODY_TUNNEL;
5111 h2s->flags |= H2_SF_TUNNEL_ABRT;
5112 }
5113 }
5114 else {
5115 TRACE_ERROR("will not encode unexpected htx block", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005116 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005117 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005118 }
5119
Christopher Faulet56498132021-01-29 11:39:43 +01005120 /* The start-line me be defined */
5121 BUG_ON(!sl);
5122
Willy Tarreau115e83b2018-12-01 19:17:53 +01005123 /* marker for end of headers */
5124 list[hdr].n = ist("");
5125
Willy Tarreau9c218e72019-05-26 10:08:28 +02005126 mbuf = br_tail(h2c->mbuf);
5127 retry:
5128 if (!h2_get_buf(h2c, mbuf)) {
5129 h2c->flags |= H2_CF_MUX_MALLOC;
5130 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005131 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 +02005132 return 0;
5133 }
5134
Willy Tarreau115e83b2018-12-01 19:17:53 +01005135 chunk_reset(&outbuf);
5136
5137 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005138 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5139 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005140 break;
5141 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005142 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau115e83b2018-12-01 19:17:53 +01005143 }
5144
5145 if (outbuf.size < 9)
5146 goto full;
5147
5148 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5149 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5150 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5151 outbuf.data = 9;
5152
Willy Tarreau8a4dca02022-01-13 16:00:12 +01005153 if ((h2c->flags & (H2_CF_SHTS_UPDATED|H2_CF_DTSU_EMITTED)) == H2_CF_SHTS_UPDATED) {
5154 /* SETTINGS_HEADER_TABLE_SIZE changed, we must send an HPACK
5155 * dynamic table size update so that some clients are not
5156 * confused. In practice we only need to send the DTSU when the
5157 * advertised size is lower than the current one, and since we
5158 * don't use it and don't care about the default 4096 bytes,
5159 * we only ack it with a zero size thus we at most have to deal
5160 * with this once. See RFC7541#4.2 and #6.3 for the spec, and
5161 * below for the whole context and interoperability risks:
5162 * https://lists.w3.org/Archives/Public/ietf-http-wg/2021OctDec/0235.html
5163 */
5164 if (b_room(&outbuf) < 1)
5165 goto full;
5166 outbuf.area[outbuf.data++] = 0x20; // HPACK DTSU 0 bytes
5167
5168 /* let's not update the flags now but only once the buffer is
5169 * really committed.
5170 */
5171 }
5172
Willy Tarreau115e83b2018-12-01 19:17:53 +01005173 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01005174 if (!hpack_encode_int_status(&outbuf, h2s->status)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005175 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005176 goto realign_again;
5177 goto full;
5178 }
5179
5180 /* encode all headers, stop at empty name */
5181 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
5182 /* these ones do not exist in H2 and must be dropped. */
5183 if (isteq(list[hdr].n, ist("connection")) ||
5184 isteq(list[hdr].n, ist("proxy-connection")) ||
5185 isteq(list[hdr].n, ist("keep-alive")) ||
5186 isteq(list[hdr].n, ist("upgrade")) ||
5187 isteq(list[hdr].n, ist("transfer-encoding")))
5188 continue;
5189
Christopher Faulet86d144c2019-08-14 16:32:25 +02005190 /* Skip all pseudo-headers */
5191 if (*(list[hdr].n.ptr) == ':')
5192 continue;
5193
Willy Tarreau115e83b2018-12-01 19:17:53 +01005194 if (isteq(list[hdr].n, ist("")))
5195 break; // end
5196
5197 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
5198 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005199 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005200 goto realign_again;
5201 goto full;
5202 }
5203 }
5204
Willy Tarreaucb985a42019-10-07 16:56:34 +02005205 /* update the frame's size */
5206 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5207
5208 if (outbuf.data > h2c->mfs + 9) {
5209 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5210 /* output full */
5211 if (b_space_wraps(mbuf))
5212 goto realign_again;
5213 goto full;
5214 }
5215 }
5216
Willy Tarreau38b5bec2021-06-17 08:40:04 +02005217 TRACE_USER("sent H2 response ", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
5218
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005219 /* remove all header blocks including the EOH and compute the
5220 * corresponding size.
Willy Tarreau115e83b2018-12-01 19:17:53 +01005221 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005222 ret = 0;
5223 blk = htx_get_head_blk(htx);
5224 while (blk) {
5225 type = htx_get_blk_type(blk);
5226 ret += htx_get_blksz(blk);
5227 blk = htx_remove_blk(htx, blk);
5228 /* The removed block is the EOH */
5229 if (type == HTX_BLK_EOH)
5230 break;
Christopher Faulet5be651d2021-01-22 15:28:03 +01005231 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005232
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005233 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW) {
5234 /* Response already closed: add END_STREAM */
5235 es_now = 1;
5236 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005237 else if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx) && h2s->status >= 200) {
5238 /* EOM+empty: we may need to add END_STREAM except for 1xx
Christopher Faulet991febd2020-12-02 15:17:31 +01005239 * responses and tunneled response.
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005240 */
Christopher Faulet991febd2020-12-02 15:17:31 +01005241 if (!(h2s->flags & H2_SF_BODY_TUNNEL) || h2s->status >= 300)
5242 es_now = 1;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005243 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005244
Willy Tarreau115e83b2018-12-01 19:17:53 +01005245 if (es_now)
5246 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5247
5248 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005249 b_add(mbuf, outbuf.data);
Christopher Faulet0b465482019-02-19 15:14:23 +01005250
5251 /* indicates the HEADERS frame was sent, except for 1xx responses. For
5252 * 1xx responses, another HEADERS frame is expected.
5253 */
Christopher Faulet89899422020-12-07 18:24:43 +01005254 if (h2s->status >= 200)
Christopher Faulet0b465482019-02-19 15:14:23 +01005255 h2s->flags |= H2_SF_HEADERS_SENT;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005256
Willy Tarreau8a4dca02022-01-13 16:00:12 +01005257 if (h2c->flags & H2_CF_SHTS_UPDATED) {
5258 /* was sent above */
5259 h2c->flags |= H2_CF_DTSU_EMITTED;
Willy Tarreaub05f4dd2022-02-16 14:28:14 +01005260 h2c->flags &= ~H2_CF_SHTS_UPDATED;
Willy Tarreau8a4dca02022-01-13 16:00:12 +01005261 }
5262
Willy Tarreau115e83b2018-12-01 19:17:53 +01005263 if (es_now) {
5264 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005265 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 +01005266 if (h2s->st == H2_SS_OPEN)
5267 h2s->st = H2_SS_HLOC;
5268 else
5269 h2s_close(h2s);
5270 }
5271
5272 /* OK we could properly deliver the response */
Willy Tarreau115e83b2018-12-01 19:17:53 +01005273 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005274 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005275 return ret;
5276 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005277 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5278 goto retry;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005279 h2c->flags |= H2_CF_MUX_MFULL;
5280 h2s->flags |= H2_SF_BLK_MROOM;
5281 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005282 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 +01005283 goto end;
5284 fail:
5285 /* unparsable HTX messages, too large ones to be produced in the local
5286 * list etc go here (unrecoverable errors).
5287 */
5288 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5289 ret = 0;
5290 goto end;
5291}
5292
Willy Tarreau80739692018-10-05 11:35:57 +02005293/* Try to send a HEADERS frame matching HTX request present in HTX message
5294 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
5295 * must check the stream's status to detect any error which might have happened
5296 * subsequently to a successful send. The htx blocks are automatically removed
5297 * from the message. The htx message is assumed to be valid since produced from
5298 * the internal code, hence it contains a start line, an optional series of
5299 * header blocks and an end of header, otherwise an invalid frame could be
5300 * emitted and the resulting htx message could be left in an inconsistent state.
5301 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005302static size_t h2s_bck_make_req_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau80739692018-10-05 11:35:57 +02005303{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005304 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau80739692018-10-05 11:35:57 +02005305 struct h2c *h2c = h2s->h2c;
5306 struct htx_blk *blk;
Willy Tarreau80739692018-10-05 11:35:57 +02005307 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005308 struct buffer *mbuf;
Willy Tarreau80739692018-10-05 11:35:57 +02005309 struct htx_sl *sl;
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005310 struct ist meth, uri, auth, host = IST_NULL;
Willy Tarreau80739692018-10-05 11:35:57 +02005311 enum htx_blk_type type;
5312 int es_now = 0;
5313 int ret = 0;
5314 int hdr;
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005315 int extended_connect = 0;
Willy Tarreau80739692018-10-05 11:35:57 +02005316
Willy Tarreau7838a792019-08-12 18:42:03 +02005317 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5318
Willy Tarreau80739692018-10-05 11:35:57 +02005319 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005320 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02005321 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005322 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02005323 return 0;
5324 }
5325
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005326 /* get the start line (we do have one) and the rest of the headers,
5327 * that we dump starting at header 0 */
5328 sl = NULL;
Willy Tarreau80739692018-10-05 11:35:57 +02005329 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005330 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005331 type = htx_get_blk_type(blk);
5332
5333 if (type == HTX_BLK_UNUSED)
5334 continue;
5335
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005336 if (type == HTX_BLK_EOH)
Willy Tarreau80739692018-10-05 11:35:57 +02005337 break;
5338
Christopher Fauletc29b4bf2021-01-29 11:49:16 +01005339 if (type == HTX_BLK_HDR) {
Christopher Faulet56498132021-01-29 11:39:43 +01005340 BUG_ON(!sl); /* The start-line mut be defined before any headers */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005341 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5342 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5343 goto fail;
5344 }
Willy Tarreau80739692018-10-05 11:35:57 +02005345
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005346 list[hdr].n = htx_get_blk_name(htx, blk);
5347 list[hdr].v = htx_get_blk_value(htx, blk);
Christopher Faulet67d58092019-10-02 10:51:38 +02005348
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005349 /* Skip header if same name is used to add the server name */
5350 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name &&
5351 isteq(list[hdr].n, ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len)))
5352 continue;
Christopher Faulet67d58092019-10-02 10:51:38 +02005353
Ilya Shipitsinacf84592021-02-06 22:29:08 +05005354 /* Convert connection: upgrade to Extended connect from rfc 8441 */
Christopher Faulet673504a2021-09-09 09:52:51 +02005355 if ((sl->flags & HTX_SL_F_CONN_UPG) && isteqi(list[hdr].n, ist("connection"))) {
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005356 /* rfc 7230 #6.1 Connection = list of tokens */
5357 struct ist connection_ist = list[hdr].v;
5358 do {
5359 if (isteqi(iststop(connection_ist, ','),
5360 ist("upgrade"))) {
Amaury Denoyelle68993a12021-10-18 09:43:29 +02005361 if (!(h2c->flags & H2_CF_RCVD_RFC8441)) {
5362 TRACE_STATE("reject upgrade because of no RFC8441 support", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5363 goto fail;
5364 }
5365
Amaury Denoyellea1fa1542021-10-18 10:05:16 +02005366 TRACE_STATE("convert upgrade to extended connect method", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005367 h2s->flags |= (H2_SF_BODY_TUNNEL|H2_SF_EXT_CONNECT_SENT);
5368 sl->info.req.meth = HTTP_METH_CONNECT;
5369 meth = ist("CONNECT");
5370
5371 extended_connect = 1;
5372 break;
5373 }
5374
5375 connection_ist = istadv(istfind(connection_ist, ','), 1);
5376 } while (istlen(connection_ist));
5377 }
5378
Christopher Faulet673504a2021-09-09 09:52:51 +02005379 if ((sl->flags & HTX_SL_F_CONN_UPG) && isteq(list[hdr].n, ist("upgrade"))) {
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005380 /* rfc 7230 #6.7 Upgrade = list of protocols
5381 * rfc 8441 #4 Extended connect = :protocol is single-valued
5382 *
5383 * only first HTTP/1 protocol is preserved
5384 */
5385 const struct ist protocol = iststop(list[hdr].v, ',');
5386 /* upgrade_protocol field is 16 bytes long in h2s */
5387 istpad(h2s->upgrade_protocol, isttrim(protocol, 15));
5388 }
5389
5390 if (isteq(list[hdr].n, ist("host")))
5391 host = list[hdr].v;
5392
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005393 hdr++;
5394 }
Christopher Fauletc29b4bf2021-01-29 11:49:16 +01005395 else if (type == HTX_BLK_REQ_SL) {
5396 BUG_ON(sl); /* Only one start-line expected */
5397 sl = htx_get_blk_ptr(htx, blk);
5398 meth = htx_sl_req_meth(sl);
5399 uri = htx_sl_req_uri(sl);
5400 if (sl->info.req.meth == HTTP_METH_HEAD)
5401 h2s->flags |= H2_SF_BODYLESS_RESP;
5402 if (unlikely(uri.len == 0)) {
5403 TRACE_ERROR("no URI in HTX request", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5404 goto fail;
5405 }
5406 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005407 else {
5408 TRACE_ERROR("will not encode unexpected htx block", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5409 goto fail;
5410 }
Willy Tarreau80739692018-10-05 11:35:57 +02005411 }
5412
Christopher Faulet56498132021-01-29 11:39:43 +01005413 /* The start-line me be defined */
5414 BUG_ON(!sl);
5415
Christopher Faulet72ba6cd2019-09-24 16:20:05 +02005416 /* Now add the server name to a header (if requested) */
5417 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name) {
5418 struct server *srv = objt_server(h2c->conn->target);
5419
5420 if (srv) {
5421 list[hdr].n = ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len);
5422 list[hdr].v = ist(srv->id);
5423 hdr++;
5424 }
5425 }
5426
Willy Tarreau80739692018-10-05 11:35:57 +02005427 /* marker for end of headers */
5428 list[hdr].n = ist("");
5429
Willy Tarreau9c218e72019-05-26 10:08:28 +02005430 mbuf = br_tail(h2c->mbuf);
5431 retry:
5432 if (!h2_get_buf(h2c, mbuf)) {
5433 h2c->flags |= H2_CF_MUX_MALLOC;
5434 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005435 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 +02005436 return 0;
5437 }
5438
Willy Tarreau80739692018-10-05 11:35:57 +02005439 chunk_reset(&outbuf);
5440
5441 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005442 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5443 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005444 break;
5445 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005446 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau80739692018-10-05 11:35:57 +02005447 }
5448
5449 if (outbuf.size < 9)
5450 goto full;
5451
5452 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5453 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5454 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5455 outbuf.data = 9;
5456
5457 /* encode the method, which necessarily is the first one */
Willy Tarreaubdabc3a2018-12-10 18:25:11 +01005458 if (!hpack_encode_method(&outbuf, sl->info.req.meth, meth)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005459 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005460 goto realign_again;
5461 goto full;
5462 }
5463
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005464 auth = ist(NULL);
5465
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005466 /* RFC7540 #8.3: the CONNECT method must have :
5467 * - :authority set to the URI part (host:port)
5468 * - :method set to CONNECT
5469 * - :scheme and :path omitted
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005470 *
5471 * Note that this is not applicable in case of the Extended CONNECT
5472 * protocol from rfc 8441.
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005473 */
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005474 if (unlikely(sl->info.req.meth == HTTP_METH_CONNECT) && !extended_connect) {
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005475 auth = uri;
5476
5477 if (!hpack_encode_header(&outbuf, ist(":authority"), auth)) {
5478 /* output full */
5479 if (b_space_wraps(mbuf))
5480 goto realign_again;
5481 goto full;
5482 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005483 h2s->flags |= H2_SF_BODY_TUNNEL;
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005484 } else {
5485 /* other methods need a :scheme. If an authority is known from
5486 * the request line, it must be sent, otherwise only host is
5487 * sent. Host is never sent as the authority.
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005488 *
5489 * This code is also applicable for Extended CONNECT protocol
5490 * from rfc 8441.
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005491 */
5492 struct ist scheme = { };
Christopher Faulet3b44c542019-06-14 10:46:51 +02005493
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005494 if (uri.ptr[0] != '/' && uri.ptr[0] != '*') {
5495 /* the URI seems to start with a scheme */
5496 int len = 1;
5497
5498 while (len < uri.len && uri.ptr[len] != ':')
5499 len++;
5500
5501 if (len + 2 < uri.len && uri.ptr[len + 1] == '/' && uri.ptr[len + 2] == '/') {
5502 /* make the uri start at the authority now */
Tim Duesterhus9f75ed12021-03-02 18:57:26 +01005503 scheme = ist2(uri.ptr, len);
Tim Duesterhus154374c2021-03-02 18:57:27 +01005504 uri = istadv(uri, len + 3);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005505
5506 /* find the auth part of the URI */
Tim Duesterhus92c696e2021-02-28 16:11:36 +01005507 auth = ist2(uri.ptr, 0);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005508 while (auth.len < uri.len && auth.ptr[auth.len] != '/')
5509 auth.len++;
5510
Tim Duesterhus154374c2021-03-02 18:57:27 +01005511 uri = istadv(uri, auth.len);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005512 }
5513 }
5514
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005515 /* For Extended CONNECT, the :authority must be present.
5516 * Use host value for it.
5517 */
5518 if (unlikely(extended_connect) && isttest(host))
5519 auth = host;
5520
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005521 if (!scheme.len) {
5522 /* no explicit scheme, we're using an origin-form URI,
5523 * probably from an H1 request transcoded to H2 via an
5524 * external layer, then received as H2 without authority.
5525 * So we have to look up the scheme from the HTX flags.
5526 * In such a case only http and https are possible, and
5527 * https is the default (sent by browsers).
5528 */
5529 if ((sl->flags & (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP)) == (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP))
5530 scheme = ist("http");
5531 else
5532 scheme = ist("https");
5533 }
Christopher Faulet3b44c542019-06-14 10:46:51 +02005534
5535 if (!hpack_encode_scheme(&outbuf, scheme)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005536 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005537 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005538 goto realign_again;
5539 goto full;
5540 }
Willy Tarreau80739692018-10-05 11:35:57 +02005541
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005542 if (auth.len && !hpack_encode_header(&outbuf, ist(":authority"), auth)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005543 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005544 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005545 goto realign_again;
5546 goto full;
5547 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005548
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005549 /* encode the path. RFC7540#8.1.2.3: if path is empty it must
5550 * be sent as '/' or '*'.
5551 */
5552 if (unlikely(!uri.len)) {
5553 if (sl->info.req.meth == HTTP_METH_OPTIONS)
5554 uri = ist("*");
5555 else
5556 uri = ist("/");
Willy Tarreau053c1572019-02-01 16:13:59 +01005557 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005558
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005559 if (!hpack_encode_path(&outbuf, uri)) {
5560 /* output full */
5561 if (b_space_wraps(mbuf))
5562 goto realign_again;
5563 goto full;
5564 }
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005565
5566 /* encode the pseudo-header protocol from rfc8441 if using
5567 * Extended CONNECT method.
5568 */
5569 if (unlikely(extended_connect)) {
5570 const struct ist protocol = ist(h2s->upgrade_protocol);
5571 if (isttest(protocol)) {
5572 if (!hpack_encode_header(&outbuf,
5573 ist(":protocol"),
5574 protocol)) {
5575 /* output full */
5576 if (b_space_wraps(mbuf))
5577 goto realign_again;
5578 goto full;
5579 }
5580 }
5581 }
Willy Tarreau80739692018-10-05 11:35:57 +02005582 }
5583
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005584 /* encode all headers, stop at empty name. Host is only sent if we
5585 * do not provide an authority.
5586 */
Willy Tarreau80739692018-10-05 11:35:57 +02005587 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005588 struct ist n = list[hdr].n;
5589 struct ist v = list[hdr].v;
5590
Willy Tarreau80739692018-10-05 11:35:57 +02005591 /* these ones do not exist in H2 and must be dropped. */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005592 if (isteq(n, ist("connection")) ||
5593 (auth.len && isteq(n, ist("host"))) ||
5594 isteq(n, ist("proxy-connection")) ||
5595 isteq(n, ist("keep-alive")) ||
5596 isteq(n, ist("upgrade")) ||
5597 isteq(n, ist("transfer-encoding")))
Willy Tarreau80739692018-10-05 11:35:57 +02005598 continue;
5599
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005600 if (isteq(n, ist("te"))) {
5601 /* "te" may only be sent with "trailers" if this value
5602 * is present, otherwise it must be deleted.
5603 */
5604 v = istist(v, ist("trailers"));
Tim Duesterhus7b5777d2021-03-02 18:57:28 +01005605 if (!isttest(v) || (v.len > 8 && v.ptr[8] != ','))
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005606 continue;
5607 v = ist("trailers");
5608 }
5609
Christopher Faulet86d144c2019-08-14 16:32:25 +02005610 /* Skip all pseudo-headers */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005611 if (*(n.ptr) == ':')
Christopher Faulet86d144c2019-08-14 16:32:25 +02005612 continue;
5613
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005614 if (isteq(n, ist("")))
Willy Tarreau80739692018-10-05 11:35:57 +02005615 break; // end
5616
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005617 if (!hpack_encode_header(&outbuf, n, v)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005618 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005619 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005620 goto realign_again;
5621 goto full;
5622 }
5623 }
5624
Willy Tarreaucb985a42019-10-07 16:56:34 +02005625 /* update the frame's size */
5626 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5627
5628 if (outbuf.data > h2c->mfs + 9) {
5629 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5630 /* output full */
5631 if (b_space_wraps(mbuf))
5632 goto realign_again;
5633 goto full;
5634 }
5635 }
5636
Willy Tarreau38b5bec2021-06-17 08:40:04 +02005637 TRACE_USER("sent H2 request ", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
5638
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005639 /* remove all header blocks including the EOH and compute the
5640 * corresponding size.
Willy Tarreau80739692018-10-05 11:35:57 +02005641 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005642 ret = 0;
5643 blk = htx_get_head_blk(htx);
5644 while (blk) {
5645 type = htx_get_blk_type(blk);
5646 ret += htx_get_blksz(blk);
5647 blk = htx_remove_blk(htx, blk);
5648 /* The removed block is the EOH */
5649 if (type == HTX_BLK_EOH)
5650 break;
Christopher Fauletd0db4232021-01-22 11:46:30 +01005651 }
Willy Tarreau80739692018-10-05 11:35:57 +02005652
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005653 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW) {
5654 /* Request already closed: add END_STREAM */
Willy Tarreau80739692018-10-05 11:35:57 +02005655 es_now = 1;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005656 }
5657 if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx)) {
5658 /* EOM+empty: we may need to add END_STREAM (except for CONNECT
5659 * request)
5660 */
5661 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5662 es_now = 1;
5663 }
Willy Tarreau80739692018-10-05 11:35:57 +02005664
Willy Tarreau80739692018-10-05 11:35:57 +02005665 if (es_now)
5666 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5667
5668 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005669 b_add(mbuf, outbuf.data);
Willy Tarreau80739692018-10-05 11:35:57 +02005670 h2s->flags |= H2_SF_HEADERS_SENT;
5671 h2s->st = H2_SS_OPEN;
5672
Willy Tarreau80739692018-10-05 11:35:57 +02005673 if (es_now) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005674 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 +02005675 // trim any possibly pending data (eg: inconsistent content-length)
5676 h2s->flags |= H2_SF_ES_SENT;
5677 h2s->st = H2_SS_HLOC;
5678 }
5679
Willy Tarreau80739692018-10-05 11:35:57 +02005680 end:
5681 return ret;
5682 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005683 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5684 goto retry;
Willy Tarreau80739692018-10-05 11:35:57 +02005685 h2c->flags |= H2_CF_MUX_MFULL;
5686 h2s->flags |= H2_SF_BLK_MROOM;
5687 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005688 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 +02005689 goto end;
5690 fail:
5691 /* unparsable HTX messages, too large ones to be produced in the local
5692 * list etc go here (unrecoverable errors).
5693 */
5694 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5695 ret = 0;
5696 goto end;
5697}
5698
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005699/* Try to send a DATA frame matching HTTP response present in HTX structure
Willy Tarreau98de12a2018-12-12 07:03:00 +01005700 * present in <buf>, for stream <h2s>. Returns the number of bytes sent. The
5701 * caller must check the stream's status to detect any error which might have
5702 * happened subsequently to a successful send. Returns the number of data bytes
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005703 * consumed, or zero if nothing done.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005704 */
Christopher Faulet142854b2020-12-02 15:12:40 +01005705static size_t h2s_make_data(struct h2s *h2s, struct buffer *buf, size_t count)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005706{
5707 struct h2c *h2c = h2s->h2c;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005708 struct htx *htx;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005709 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005710 struct buffer *mbuf;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005711 size_t total = 0;
5712 int es_now = 0;
5713 int bsize; /* htx block size */
5714 int fsize; /* h2 frame size */
5715 struct htx_blk *blk;
5716 enum htx_blk_type type;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005717 int trunc_out; /* non-zero if truncated on out buf */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005718
Willy Tarreau7838a792019-08-12 18:42:03 +02005719 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5720
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005721 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005722 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005723 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005724 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005725 goto end;
5726 }
5727
Willy Tarreau98de12a2018-12-12 07:03:00 +01005728 htx = htx_from_buf(buf);
5729
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005730 /* We only come here with HTX_BLK_DATA blocks */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005731
5732 new_frame:
Willy Tarreauee573762018-12-04 15:25:57 +01005733 if (!count || htx_is_empty(htx))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005734 goto end;
5735
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005736 if ((h2c->flags & H2_CF_IS_BACK) &&
Christopher Fauletf95f8762021-01-22 11:59:07 +01005737 (h2s->flags & (H2_SF_HEADERS_RCVD|H2_SF_BODY_TUNNEL)) == H2_SF_BODY_TUNNEL) {
5738 /* The response HEADERS frame not received yet. Thus the tunnel
5739 * is not fully established yet. In this situation, we block
5740 * data sending.
5741 */
5742 h2s->flags |= H2_SF_BLK_MBUSY;
5743 TRACE_STATE("Request DATA frame blocked waiting for tunnel establishment", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5744 goto end;
5745 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01005746 else if ((h2c->flags & H2_CF_IS_BACK) && (h2s->flags & H2_SF_TUNNEL_ABRT)) {
5747 /* a tunnel attempt was aborted but the is pending raw data to xfer to the server.
5748 * Thus the stream is closed with the CANCEL error. The error will be reported to
5749 * the upper layer as aserver abort. But at this stage there is nothing more we can
5750 * do. We just wait for the end of the response to be sure to not truncate it.
5751 */
5752 if (!(h2s->flags & H2_SF_ES_RCVD)) {
5753 TRACE_STATE("Request DATA frame blocked waiting end of aborted tunnel", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5754 h2s->flags |= H2_SF_BLK_MBUSY;
5755 }
5756 else {
5757 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
5758 h2s_error(h2s, H2_ERR_CANCEL);
5759 }
5760 goto end;
5761 }
Willy Tarreau98de12a2018-12-12 07:03:00 +01005762
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005763 blk = htx_get_head_blk(htx);
5764 type = htx_get_blk_type(blk);
5765 bsize = htx_get_blksz(blk);
5766 fsize = bsize;
5767 trunc_out = 0;
5768 if (type != HTX_BLK_DATA)
5769 goto end;
5770
Willy Tarreau9c218e72019-05-26 10:08:28 +02005771 mbuf = br_tail(h2c->mbuf);
5772 retry:
5773 if (!h2_get_buf(h2c, mbuf)) {
5774 h2c->flags |= H2_CF_MUX_MALLOC;
5775 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005776 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 +02005777 goto end;
5778 }
5779
Willy Tarreau98de12a2018-12-12 07:03:00 +01005780 /* Perform some optimizations to reduce the number of buffer copies.
5781 * First, if the mux's buffer is empty and the htx area contains
5782 * exactly one data block of the same size as the requested count, and
5783 * this count fits within the frame size, the stream's window size, and
5784 * the connection's window size, then it's possible to simply swap the
5785 * caller's buffer with the mux's output buffer and adjust offsets and
5786 * length to match the entire DATA HTX block in the middle. In this
5787 * case we perform a true zero-copy operation from end-to-end. This is
5788 * the situation that happens all the time with large files. Second, if
5789 * this is not possible, but the mux's output buffer is empty, we still
5790 * have an opportunity to avoid the copy to the intermediary buffer, by
5791 * making the intermediary buffer's area point to the output buffer's
5792 * area. In this case we want to skip the HTX header to make sure that
5793 * copies remain aligned and that this operation remains possible all
5794 * the time. This goes for headers, data blocks and any data extracted
5795 * from the HTX blocks.
5796 */
5797 if (unlikely(fsize == count &&
Christopher Faulet192c6a22019-06-11 16:32:24 +02005798 htx_nbblks(htx) == 1 && type == HTX_BLK_DATA &&
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005799 fsize <= h2s_mws(h2s) && fsize <= h2c->mws && fsize <= h2c->mfs)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005800 void *old_area = mbuf->area;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005801
Willy Tarreaubcc45952019-05-26 10:05:50 +02005802 if (b_data(mbuf)) {
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005803 /* Too bad there are data left there. We're willing to memcpy/memmove
5804 * up to 1/4 of the buffer, which means that it's OK to copy a large
5805 * frame into a buffer containing few data if it needs to be realigned,
5806 * and that it's also OK to copy few data without realigning. Otherwise
5807 * we'll pretend the mbuf is full and wait for it to become empty.
Willy Tarreau98de12a2018-12-12 07:03:00 +01005808 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005809 if (fsize + 9 <= b_room(mbuf) &&
5810 (b_data(mbuf) <= b_size(mbuf) / 4 ||
Willy Tarreau7838a792019-08-12 18:42:03 +02005811 (fsize <= b_size(mbuf) / 4 && fsize + 9 <= b_contig_space(mbuf)))) {
5812 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 +01005813 goto copy;
Willy Tarreau7838a792019-08-12 18:42:03 +02005814 }
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005815
Willy Tarreau9c218e72019-05-26 10:08:28 +02005816 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5817 goto retry;
5818
Willy Tarreau98de12a2018-12-12 07:03:00 +01005819 h2c->flags |= H2_CF_MUX_MFULL;
5820 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005821 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 +01005822 goto end;
5823 }
5824
Christopher Faulet925abdf2021-04-27 22:51:07 +02005825 if (htx->flags & HTX_FL_EOM) {
5826 /* EOM+empty: we may need to add END_STREAM (except for tunneled
5827 * message)
5828 */
5829 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5830 es_now = 1;
5831 }
Willy Tarreau98de12a2018-12-12 07:03:00 +01005832 /* map an H2 frame to the HTX block so that we can put the
5833 * frame header there.
5834 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005835 *mbuf = b_make(buf->area, buf->size, sizeof(struct htx) + blk->addr - 9, fsize + 9);
5836 outbuf.area = b_head(mbuf);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005837
5838 /* prepend an H2 DATA frame header just before the DATA block */
5839 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5840 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
Christopher Faulet925abdf2021-04-27 22:51:07 +02005841 if (es_now)
5842 outbuf.area[4] |= H2_F_DATA_END_STREAM;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005843 h2_set_frame_size(outbuf.area, fsize);
5844
5845 /* update windows */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005846 h2s->sws -= fsize;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005847 h2c->mws -= fsize;
5848
5849 /* and exchange with our old area */
5850 buf->area = old_area;
5851 buf->data = buf->head = 0;
5852 total += fsize;
Christopher Faulet925abdf2021-04-27 22:51:07 +02005853 fsize = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005854
5855 TRACE_PROTO("sent H2 DATA frame (zero-copy)", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Christopher Faulet925abdf2021-04-27 22:51:07 +02005856 goto out;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005857 }
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005858
Willy Tarreau98de12a2018-12-12 07:03:00 +01005859 copy:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005860 /* for DATA and EOM we'll have to emit a frame, even if empty */
5861
5862 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005863 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5864 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005865 break;
5866 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005867 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005868 }
5869
5870 if (outbuf.size < 9) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02005871 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5872 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005873 h2c->flags |= H2_CF_MUX_MFULL;
5874 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005875 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005876 goto end;
5877 }
5878
5879 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
5880 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5881 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5882 outbuf.data = 9;
5883
5884 /* we have in <fsize> the exact number of bytes we need to copy from
5885 * the HTX buffer. We need to check this against the connection's and
5886 * the stream's send windows, and to ensure that this fits in the max
5887 * frame size and in the buffer's available space minus 9 bytes (for
5888 * the frame header). The connection's flow control is applied last so
5889 * that we can use a separate list of streams which are immediately
5890 * unblocked on window opening. Note: we don't implement padding.
5891 */
5892
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005893 if (!fsize)
5894 goto send_empty;
5895
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005896 if (h2s_mws(h2s) <= 0) {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005897 h2s->flags |= H2_SF_BLK_SFCTL;
Willy Tarreau2b718102021-04-21 07:32:39 +02005898 if (LIST_INLIST(&h2s->list))
Olivier Houchardbfe2a832019-05-10 14:02:21 +02005899 LIST_DEL_INIT(&h2s->list);
Willy Tarreau2b718102021-04-21 07:32:39 +02005900 LIST_APPEND(&h2c->blocked_list, &h2s->list);
Willy Tarreau7838a792019-08-12 18:42:03 +02005901 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 +01005902 goto end;
5903 }
5904
Willy Tarreauee573762018-12-04 15:25:57 +01005905 if (fsize > count)
5906 fsize = count;
5907
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005908 if (fsize > h2s_mws(h2s))
5909 fsize = h2s_mws(h2s); // >0
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005910
5911 if (h2c->mfs && fsize > h2c->mfs)
5912 fsize = h2c->mfs; // >0
5913
5914 if (fsize + 9 > outbuf.size) {
Willy Tarreau455d5682019-05-24 19:42:18 +02005915 /* It doesn't fit at once. If it at least fits once split and
5916 * the amount of data to move is low, let's defragment the
5917 * buffer now.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005918 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005919 if (b_space_wraps(mbuf) &&
5920 (fsize + 9 <= b_room(mbuf)) &&
5921 b_data(mbuf) <= MAX_DATA_REALIGN)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005922 goto realign_again;
5923 fsize = outbuf.size - 9;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005924 trunc_out = 1;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005925
5926 if (fsize <= 0) {
5927 /* no need to send an empty frame here */
Willy Tarreau9c218e72019-05-26 10:08:28 +02005928 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5929 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005930 h2c->flags |= H2_CF_MUX_MFULL;
5931 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005932 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005933 goto end;
5934 }
5935 }
5936
5937 if (h2c->mws <= 0) {
5938 h2s->flags |= H2_SF_BLK_MFCTL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005939 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 +01005940 goto end;
5941 }
5942
5943 if (fsize > h2c->mws)
5944 fsize = h2c->mws;
5945
5946 /* now let's copy this this into the output buffer */
5947 memcpy(outbuf.area + 9, htx_get_blk_ptr(htx, blk), fsize);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005948 h2s->sws -= fsize;
Willy Tarreau0f799ca2018-12-04 15:20:11 +01005949 h2c->mws -= fsize;
Willy Tarreauee573762018-12-04 15:25:57 +01005950 count -= fsize;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005951
5952 send_empty:
5953 /* update the frame's size */
5954 h2_set_frame_size(outbuf.area, fsize);
5955
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005956 /* consume incoming HTX block */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005957 total += fsize;
5958 if (fsize == bsize) {
5959 htx_remove_blk(htx, blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005960 if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx)) {
5961 /* EOM+empty: we may need to add END_STREAM (except for tunneled
5962 * message)
5963 */
5964 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5965 es_now = 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02005966 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005967 }
5968 else {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005969 /* we've truncated this block */
5970 htx_cut_data_blk(htx, blk, fsize);
5971 }
5972
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005973 if (es_now)
5974 outbuf.area[4] |= H2_F_DATA_END_STREAM;
5975
5976 /* commit the H2 response */
5977 b_add(mbuf, fsize + 9);
5978
Christopher Faulet925abdf2021-04-27 22:51:07 +02005979 out:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005980 if (es_now) {
5981 if (h2s->st == H2_SS_OPEN)
5982 h2s->st = H2_SS_HLOC;
5983 else
5984 h2s_close(h2s);
5985
5986 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005987 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 +01005988 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005989 else if (fsize) {
5990 if (fsize == bsize) {
5991 TRACE_DEVEL("more data may be available, trying to send another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5992 goto new_frame;
5993 }
5994 else if (trunc_out) {
5995 /* we've truncated this block */
5996 goto new_frame;
5997 }
5998 }
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005999
6000 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02006001 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006002 return total;
6003}
6004
Christopher Faulet991febd2020-12-02 15:17:31 +01006005/* Skip the message payload (DATA blocks) and emit an empty DATA frame with the
6006 * ES flag set for stream <h2s>. This function is called for response known to
6007 * have no payload. Only DATA blocks are skipped. This means the trailers are
Ilya Shipitsinacf84592021-02-06 22:29:08 +05006008 * still emitted. The caller must check the stream's status to detect any error
Christopher Faulet991febd2020-12-02 15:17:31 +01006009 * which might have happened subsequently to a successful send. Returns the
6010 * number of data bytes consumed, or zero if nothing done.
6011 */
6012static size_t h2s_skip_data(struct h2s *h2s, struct buffer *buf, size_t count)
6013{
6014 struct h2c *h2c = h2s->h2c;
6015 struct htx *htx;
6016 int bsize; /* htx block size */
6017 int fsize; /* h2 frame size */
6018 struct htx_blk *blk;
6019 enum htx_blk_type type;
6020 size_t total = 0;
6021
6022 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6023
6024 if (h2c_mux_busy(h2c, h2s)) {
6025 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6026 h2s->flags |= H2_SF_BLK_MBUSY;
6027 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6028 goto end;
6029 }
6030
6031 htx = htx_from_buf(buf);
6032
6033 next_data:
6034 if (!count || htx_is_empty(htx))
6035 goto end;
6036 blk = htx_get_head_blk(htx);
6037 type = htx_get_blk_type(blk);
6038 bsize = htx_get_blksz(blk);
6039 fsize = bsize;
6040 if (type != HTX_BLK_DATA)
6041 goto end;
6042
6043 if (fsize > count)
6044 fsize = count;
6045
6046 if (fsize != bsize)
6047 goto skip_data;
6048
6049 if (!(htx->flags & HTX_FL_EOM) || !htx_is_unique_blk(htx, blk))
6050 goto skip_data;
6051
6052 /* Here, it is the last block and it is also the end of the message. So
6053 * we can emit an empty DATA frame with the ES flag set
6054 */
6055 if (h2_send_empty_data_es(h2s) <= 0)
6056 goto end;
6057
6058 if (h2s->st == H2_SS_OPEN)
6059 h2s->st = H2_SS_HLOC;
6060 else
6061 h2s_close(h2s);
6062
6063 skip_data:
6064 /* consume incoming HTX block */
6065 total += fsize;
6066 if (fsize == bsize) {
6067 TRACE_DEVEL("more data may be available, trying to skip another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6068 htx_remove_blk(htx, blk);
6069 goto next_data;
6070 }
6071 else {
6072 /* we've truncated this block */
6073 htx_cut_data_blk(htx, blk, fsize);
6074 }
6075
6076 end:
6077 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6078 return total;
6079}
6080
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006081/* Try to send a HEADERS frame matching HTX_BLK_TLR series of blocks present in
6082 * HTX message <htx> for the H2 stream <h2s>. Returns the number of bytes
6083 * processed. The caller must check the stream's status to detect any error
6084 * which might have happened subsequently to a successful send. The htx blocks
6085 * are automatically removed from the message. The htx message is assumed to be
6086 * valid since produced from the internal code. Processing stops when meeting
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006087 * the EOT, which *is* removed. All trailers are processed at once and sent as a
6088 * single frame. The ES flag is always set.
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006089 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006090static size_t h2s_make_trailers(struct h2s *h2s, struct htx *htx)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006091{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02006092 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006093 struct h2c *h2c = h2s->h2c;
6094 struct htx_blk *blk;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006095 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02006096 struct buffer *mbuf;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006097 enum htx_blk_type type;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006098 int ret = 0;
6099 int hdr;
6100 int idx;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006101
Willy Tarreau7838a792019-08-12 18:42:03 +02006102 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
6103
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006104 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006105 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006106 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02006107 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006108 goto end;
6109 }
6110
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006111 /* get trailers. */
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006112 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006113 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006114 type = htx_get_blk_type(blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006115
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006116 if (type == HTX_BLK_UNUSED)
6117 continue;
6118
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006119 if (type == HTX_BLK_EOT)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006120 break;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006121 if (type == HTX_BLK_TLR) {
6122 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
6123 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
6124 goto fail;
6125 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006126
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006127 list[hdr].n = htx_get_blk_name(htx, blk);
6128 list[hdr].v = htx_get_blk_value(htx, blk);
6129 hdr++;
6130 }
6131 else {
6132 TRACE_ERROR("will not encode unexpected htx block", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006133 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02006134 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006135 }
6136
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006137 /* marker for end of trailers */
6138 list[hdr].n = ist("");
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006139
Willy Tarreau9c218e72019-05-26 10:08:28 +02006140 mbuf = br_tail(h2c->mbuf);
6141 retry:
6142 if (!h2_get_buf(h2c, mbuf)) {
6143 h2c->flags |= H2_CF_MUX_MALLOC;
6144 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02006145 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 +02006146 goto end;
6147 }
6148
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006149 chunk_reset(&outbuf);
6150
6151 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02006152 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
6153 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006154 break;
6155 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02006156 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006157 }
6158
6159 if (outbuf.size < 9)
6160 goto full;
6161
6162 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4,ES=1 */
6163 memcpy(outbuf.area, "\x00\x00\x00\x01\x05", 5);
6164 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
6165 outbuf.data = 9;
6166
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006167 /* encode all headers */
6168 for (idx = 0; idx < hdr; idx++) {
6169 /* these ones do not exist in H2 or must not appear in
6170 * trailers and must be dropped.
6171 */
6172 if (isteq(list[idx].n, ist("host")) ||
6173 isteq(list[idx].n, ist("content-length")) ||
6174 isteq(list[idx].n, ist("connection")) ||
6175 isteq(list[idx].n, ist("proxy-connection")) ||
6176 isteq(list[idx].n, ist("keep-alive")) ||
6177 isteq(list[idx].n, ist("upgrade")) ||
6178 isteq(list[idx].n, ist("te")) ||
6179 isteq(list[idx].n, ist("transfer-encoding")))
6180 continue;
6181
Christopher Faulet86d144c2019-08-14 16:32:25 +02006182 /* Skip all pseudo-headers */
6183 if (*(list[idx].n.ptr) == ':')
6184 continue;
6185
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006186 if (!hpack_encode_header(&outbuf, list[idx].n, list[idx].v)) {
6187 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02006188 if (b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006189 goto realign_again;
6190 goto full;
6191 }
6192 }
6193
Willy Tarreau5121e5d2019-05-06 15:13:41 +02006194 if (outbuf.data == 9) {
6195 /* here we have a problem, we have nothing to emit (either we
6196 * received an empty trailers block followed or we removed its
6197 * contents above). Because of this we can't send a HEADERS
6198 * frame, so we have to cheat and instead send an empty DATA
6199 * frame conveying the ES flag.
Willy Tarreau67b8cae2019-02-21 18:16:35 +01006200 */
6201 outbuf.area[3] = H2_FT_DATA;
6202 outbuf.area[4] = H2_F_DATA_END_STREAM;
6203 }
6204
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006205 /* update the frame's size */
6206 h2_set_frame_size(outbuf.area, outbuf.data - 9);
6207
Willy Tarreau572d9f52019-10-11 16:58:37 +02006208 if (outbuf.data > h2c->mfs + 9) {
6209 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
6210 /* output full */
6211 if (b_space_wraps(mbuf))
6212 goto realign_again;
6213 goto full;
6214 }
6215 }
6216
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006217 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02006218 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 +02006219 b_add(mbuf, outbuf.data);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006220 h2s->flags |= H2_SF_ES_SENT;
6221
6222 if (h2s->st == H2_SS_OPEN)
6223 h2s->st = H2_SS_HLOC;
6224 else
6225 h2s_close(h2s);
6226
6227 /* OK we could properly deliver the response */
6228 done:
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02006229 /* remove all header blocks till the end and compute the corresponding size. */
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006230 ret = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006231 blk = htx_get_head_blk(htx);
6232 while (blk) {
6233 type = htx_get_blk_type(blk);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006234 ret += htx_get_blksz(blk);
6235 blk = htx_remove_blk(htx, blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006236 /* The removed block is the EOT */
6237 if (type == HTX_BLK_EOT)
6238 break;
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006239 }
6240
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006241 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02006242 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006243 return ret;
6244 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02006245 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
6246 goto retry;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006247 h2c->flags |= H2_CF_MUX_MFULL;
6248 h2s->flags |= H2_SF_BLK_MROOM;
6249 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006250 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 +01006251 goto end;
6252 fail:
6253 /* unparsable HTX messages, too large ones to be produced in the local
6254 * list etc go here (unrecoverable errors).
6255 */
6256 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
6257 ret = 0;
6258 goto end;
6259}
6260
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006261/* Called from the upper layer, to subscribe <es> to events <event_type>. The
6262 * event subscriber <es> is not allowed to change from a previous call as long
6263 * as at least one event is still subscribed. The <event_type> must only be a
6264 * combination of SUB_RETRY_RECV and SUB_RETRY_SEND. It always returns 0.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006265 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006266static int h2_subscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard6ff20392018-07-17 18:46:31 +02006267{
Olivier Houchard6ff20392018-07-17 18:46:31 +02006268 struct h2s *h2s = cs->ctx;
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02006269 struct h2c *h2c = h2s->h2c;
Olivier Houchard6ff20392018-07-17 18:46:31 +02006270
Willy Tarreau7838a792019-08-12 18:42:03 +02006271 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006272
6273 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006274 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006275
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006276 es->events |= event_type;
6277 h2s->subs = es;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006278
6279 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006280 TRACE_DEVEL("subscribe(recv)", H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006281
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006282 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006283 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2c->conn, h2s);
Olivier Houchardf8338152019-05-14 17:50:32 +02006284 if (!(h2s->flags & H2_SF_BLK_SFCTL) &&
Willy Tarreau2b718102021-04-21 07:32:39 +02006285 !LIST_INLIST(&h2s->list)) {
Olivier Houchardf8338152019-05-14 17:50:32 +02006286 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02006287 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Olivier Houchardf8338152019-05-14 17:50:32 +02006288 else
Willy Tarreau2b718102021-04-21 07:32:39 +02006289 LIST_APPEND(&h2c->send_list, &h2s->list);
Olivier Houcharde1c6dbc2018-08-01 17:06:43 +02006290 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02006291 }
Willy Tarreau7838a792019-08-12 18:42:03 +02006292 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006293 return 0;
Olivier Houchard6ff20392018-07-17 18:46:31 +02006294}
6295
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006296/* Called from the upper layer, to unsubscribe <es> from events <event_type>.
6297 * The <es> pointer is not allowed to differ from the one passed to the
6298 * subscribe() call. It always returns zero.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006299 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006300static int h2_unsubscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006301{
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006302 struct h2s *h2s = cs->ctx;
6303
Willy Tarreau7838a792019-08-12 18:42:03 +02006304 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006305
6306 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006307 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006308
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006309 es->events &= ~event_type;
6310 if (!es->events)
Willy Tarreauf96508a2020-01-10 11:12:48 +01006311 h2s->subs = NULL;
6312
6313 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006314 TRACE_DEVEL("unsubscribe(recv)", H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006315
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006316 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006317 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006318 h2s->flags &= ~H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006319 if (!(h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)))
6320 LIST_DEL_INIT(&h2s->list);
Olivier Houchardd846c262018-10-19 17:24:29 +02006321 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01006322
Willy Tarreau7838a792019-08-12 18:42:03 +02006323 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006324 return 0;
6325}
6326
6327
Christopher Faulet93a466b2021-09-21 15:50:55 +02006328/* Called from the upper layer, to receive data
6329 *
6330 * The caller is responsible for defragmenting <buf> if necessary. But <flags>
6331 * must be tested to know the calling context. If CO_RFL_BUF_FLUSH is set, it
6332 * means the caller wants to flush input data (from the mux buffer and the
6333 * channel buffer) to be able to use kernel splicing or any kind of mux-to-mux
6334 * xfer. If CO_RFL_KEEP_RECV is set, the mux must always subscribe for read
6335 * events before giving back. CO_RFL_BUF_WET is set if <buf> is congested with
6336 * data scheduled for leaving soon. CO_RFL_BUF_NOT_STUCK is set to instruct the
6337 * mux it may optimize the data copy to <buf> if necessary. Otherwise, it should
6338 * copy as much data as possible.
6339 */
Olivier Houchard511efea2018-08-16 15:30:32 +02006340static size_t h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
6341{
Olivier Houchard638b7992018-08-16 15:41:52 +02006342 struct h2s *h2s = cs->ctx;
Willy Tarreau082f5592018-11-25 08:03:32 +01006343 struct h2c *h2c = h2s->h2c;
Willy Tarreau86724e22018-12-01 23:19:43 +01006344 struct htx *h2s_htx = NULL;
6345 struct htx *buf_htx = NULL;
Olivier Houchard511efea2018-08-16 15:30:32 +02006346 size_t ret = 0;
6347
Willy Tarreau7838a792019-08-12 18:42:03 +02006348 TRACE_ENTER(H2_EV_STRM_RECV, h2c->conn, h2s);
6349
Olivier Houchard511efea2018-08-16 15:30:32 +02006350 /* transfer possibly pending data to the upper layer */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006351 h2s_htx = htx_from_buf(&h2s->rxbuf);
Christopher Faulet83f3d3d2022-02-21 15:12:54 +01006352 if (htx_is_empty(h2s_htx) && !(h2s_htx->flags & HTX_FL_PARSING_ERROR)) {
Christopher Faulet9b79a102019-07-15 11:22:56 +02006353 /* Here htx_to_buf() will set buffer data to 0 because
6354 * the HTX is empty.
6355 */
6356 htx_to_buf(h2s_htx, &h2s->rxbuf);
6357 goto end;
6358 }
Willy Tarreau7196dd62019-03-05 10:51:11 +01006359
Christopher Faulet9b79a102019-07-15 11:22:56 +02006360 ret = h2s_htx->data;
6361 buf_htx = htx_from_buf(buf);
Willy Tarreau7196dd62019-03-05 10:51:11 +01006362
Christopher Faulet9b79a102019-07-15 11:22:56 +02006363 /* <buf> is empty and the message is small enough, swap the
6364 * buffers. */
6365 if (htx_is_empty(buf_htx) && htx_used_space(h2s_htx) <= count) {
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01006366 htx_to_buf(buf_htx, buf);
6367 htx_to_buf(h2s_htx, &h2s->rxbuf);
Christopher Faulet9b79a102019-07-15 11:22:56 +02006368 b_xfer(buf, &h2s->rxbuf, b_data(&h2s->rxbuf));
6369 goto end;
Willy Tarreau86724e22018-12-01 23:19:43 +01006370 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02006371
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006372 htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_UNUSED);
Christopher Faulet9b79a102019-07-15 11:22:56 +02006373
6374 if (h2s_htx->flags & HTX_FL_PARSING_ERROR) {
6375 buf_htx->flags |= HTX_FL_PARSING_ERROR;
6376 if (htx_is_empty(buf_htx))
6377 cs->flags |= CS_FL_EOI;
Willy Tarreau86724e22018-12-01 23:19:43 +01006378 }
Christopher Faulet810df062020-07-22 16:20:34 +02006379 else if (htx_is_empty(h2s_htx))
Christopher Faulet42432f32020-11-20 17:43:16 +01006380 buf_htx->flags |= (h2s_htx->flags & HTX_FL_EOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02006381
Christopher Faulet9b79a102019-07-15 11:22:56 +02006382 buf_htx->extra = (h2s_htx->extra ? (h2s_htx->data + h2s_htx->extra) : 0);
6383 htx_to_buf(buf_htx, buf);
6384 htx_to_buf(h2s_htx, &h2s->rxbuf);
6385 ret -= h2s_htx->data;
6386
Christopher Faulet37070b22019-02-14 15:12:14 +01006387 end:
Olivier Houchard638b7992018-08-16 15:41:52 +02006388 if (b_data(&h2s->rxbuf))
Olivier Houchardd247be02018-12-06 16:22:29 +01006389 cs->flags |= (CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02006390 else {
Olivier Houchardd247be02018-12-06 16:22:29 +01006391 cs->flags &= ~(CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Christopher Fauletd0db4232021-01-22 11:46:30 +01006392 if (h2s->flags & H2_SF_ES_RCVD) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02006393 cs->flags |= CS_FL_EOI;
Christopher Fauletd0db4232021-01-22 11:46:30 +01006394 /* Add EOS flag for tunnel */
6395 if (h2s->flags & H2_SF_BODY_TUNNEL)
6396 cs->flags |= CS_FL_EOS;
6397 }
Christopher Fauletaade4ed2020-10-08 15:38:41 +02006398 if (h2c_read0_pending(h2c) || h2s->st == H2_SS_CLOSED)
Olivier Houchard511efea2018-08-16 15:30:32 +02006399 cs->flags |= CS_FL_EOS;
Olivier Houchard71748cb2018-12-17 14:16:46 +01006400 if (cs->flags & CS_FL_ERR_PENDING)
6401 cs->flags |= CS_FL_ERROR;
Olivier Houchard638b7992018-08-16 15:41:52 +02006402 if (b_size(&h2s->rxbuf)) {
6403 b_free(&h2s->rxbuf);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01006404 offer_buffers(NULL, 1);
Olivier Houchard638b7992018-08-16 15:41:52 +02006405 }
Olivier Houchard511efea2018-08-16 15:30:32 +02006406 }
6407
Willy Tarreau082f5592018-11-25 08:03:32 +01006408 if (ret && h2c->dsi == h2s->id) {
6409 /* demux is blocking on this stream's buffer */
6410 h2c->flags &= ~H2_CF_DEM_SFULL;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02006411 h2c_restart_reading(h2c, 1);
Willy Tarreau082f5592018-11-25 08:03:32 +01006412 }
Christopher Faulet37070b22019-02-14 15:12:14 +01006413
Willy Tarreau7838a792019-08-12 18:42:03 +02006414 TRACE_LEAVE(H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard511efea2018-08-16 15:30:32 +02006415 return ret;
6416}
6417
Olivier Houchardd846c262018-10-19 17:24:29 +02006418
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006419/* Called from the upper layer, to send data from buffer <buf> for no more than
6420 * <count> bytes. Returns the number of bytes effectively sent. Some status
6421 * flags may be updated on the conn_stream.
6422 */
Christopher Fauletd44a9b32018-07-27 11:59:41 +02006423static size_t h2_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
Willy Tarreau62f52692017-10-08 23:01:42 +02006424{
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006425 struct h2s *h2s = cs->ctx;
Willy Tarreau1dc41e72018-06-14 13:21:28 +02006426 size_t total = 0;
Willy Tarreau5dd17352018-06-14 13:33:30 +02006427 size_t ret;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006428 struct htx *htx;
6429 struct htx_blk *blk;
6430 enum htx_blk_type btype;
6431 uint32_t bsize;
6432 int32_t idx;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006433
Willy Tarreau7838a792019-08-12 18:42:03 +02006434 TRACE_ENTER(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
6435
Olivier Houchardd360ac62019-03-22 17:37:16 +01006436 /* If we were not just woken because we wanted to send but couldn't,
6437 * and there's somebody else that is waiting to send, do nothing,
6438 * we will subscribe later and be put at the end of the list
6439 */
Willy Tarreaud9464162020-01-10 18:25:07 +01006440 if (!(h2s->flags & H2_SF_NOTIFIED) &&
Willy Tarreau7838a792019-08-12 18:42:03 +02006441 (!LIST_ISEMPTY(&h2s->h2c->send_list) || !LIST_ISEMPTY(&h2s->h2c->fctl_list))) {
6442 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 +01006443 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006444 }
Willy Tarreaud9464162020-01-10 18:25:07 +01006445 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02006446
Willy Tarreau7838a792019-08-12 18:42:03 +02006447 if (h2s->h2c->st0 < H2_CS_FRAME_H) {
6448 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 +02006449 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006450 }
Willy Tarreau6bf641a2018-10-08 09:43:03 +02006451
Willy Tarreaucab22952019-10-31 15:48:18 +01006452 if (h2s->h2c->st0 >= H2_CS_ERROR) {
6453 cs->flags |= CS_FL_ERROR;
6454 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);
6455 return 0;
6456 }
6457
Christopher Faulet9b79a102019-07-15 11:22:56 +02006458 htx = htx_from_buf(buf);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006459
Willy Tarreau0bad0432018-06-14 16:54:01 +02006460 if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count)
Willy Tarreauc4312d32017-11-07 12:01:53 +01006461 h2s->flags |= H2_SF_OUTGOING_DATA;
6462
Willy Tarreau751f2d02018-10-05 09:35:00 +02006463 if (h2s->id == 0) {
6464 int32_t id = h2c_get_next_sid(h2s->h2c);
6465
6466 if (id < 0) {
Willy Tarreau751f2d02018-10-05 09:35:00 +02006467 cs->flags |= CS_FL_ERROR;
Willy Tarreau7838a792019-08-12 18:42:03 +02006468 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 +02006469 return 0;
6470 }
6471
6472 eb32_delete(&h2s->by_id);
6473 h2s->by_id.key = h2s->id = id;
6474 h2s->h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01006475 h2s->h2c->nb_reserved--;
Willy Tarreau751f2d02018-10-05 09:35:00 +02006476 eb32_insert(&h2s->h2c->streams_by_id, &h2s->by_id);
6477 }
6478
Christopher Faulet9b79a102019-07-15 11:22:56 +02006479 while (h2s->st < H2_SS_HLOC && !(h2s->flags & H2_SF_BLK_ANY) &&
6480 count && !htx_is_empty(htx)) {
6481 idx = htx_get_head(htx);
6482 blk = htx_get_blk(htx, idx);
6483 btype = htx_get_blk_type(blk);
6484 bsize = htx_get_blksz(blk);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006485
Christopher Faulet9b79a102019-07-15 11:22:56 +02006486 switch (btype) {
Willy Tarreau80739692018-10-05 11:35:57 +02006487 case HTX_BLK_REQ_SL:
6488 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006489 ret = h2s_bck_make_req_headers(h2s, htx);
Willy Tarreau80739692018-10-05 11:35:57 +02006490 if (ret > 0) {
6491 total += ret;
6492 count -= ret;
6493 if (ret < bsize)
6494 goto done;
6495 }
6496 break;
6497
Willy Tarreau115e83b2018-12-01 19:17:53 +01006498 case HTX_BLK_RES_SL:
6499 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006500 ret = h2s_frt_make_resp_headers(h2s, htx);
Willy Tarreau115e83b2018-12-01 19:17:53 +01006501 if (ret > 0) {
6502 total += ret;
6503 count -= ret;
6504 if (ret < bsize)
6505 goto done;
6506 }
6507 break;
6508
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006509 case HTX_BLK_DATA:
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006510 /* all these cause the emission of a DATA frame (possibly empty) */
Christopher Faulet991febd2020-12-02 15:17:31 +01006511 if (!(h2s->h2c->flags & H2_CF_IS_BACK) &&
6512 (h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_BODYLESS_RESP)) == H2_SF_BODYLESS_RESP)
6513 ret = h2s_skip_data(h2s, buf, count);
6514 else
6515 ret = h2s_make_data(h2s, buf, count);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006516 if (ret > 0) {
Willy Tarreau98de12a2018-12-12 07:03:00 +01006517 htx = htx_from_buf(buf);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006518 total += ret;
6519 count -= ret;
6520 if (ret < bsize)
6521 goto done;
6522 }
6523 break;
6524
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006525 case HTX_BLK_TLR:
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006526 case HTX_BLK_EOT:
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006527 /* This is the first trailers block, all the subsequent ones */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006528 ret = h2s_make_trailers(h2s, htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006529 if (ret > 0) {
6530 total += ret;
6531 count -= ret;
6532 if (ret < bsize)
6533 goto done;
6534 }
6535 break;
6536
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006537 default:
6538 htx_remove_blk(htx, blk);
6539 total += bsize;
6540 count -= bsize;
6541 break;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006542 }
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006543 }
6544
Christopher Faulet9b79a102019-07-15 11:22:56 +02006545 done:
Willy Tarreau2b778482019-05-06 15:00:22 +02006546 if (h2s->st >= H2_SS_HLOC) {
Willy Tarreau00610962018-07-19 10:58:28 +02006547 /* trim any possibly pending data after we close (extra CR-LF,
6548 * unprocessed trailers, abnormal extra data, ...)
6549 */
Willy Tarreau0bad0432018-06-14 16:54:01 +02006550 total += count;
6551 count = 0;
Willy Tarreau00610962018-07-19 10:58:28 +02006552 }
6553
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006554 /* RST are sent similarly to frame acks */
Willy Tarreau02492192017-12-07 15:59:29 +01006555 if (h2s->st == H2_SS_ERROR || h2s->flags & H2_SF_RST_RCVD) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006556 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 +01006557 cs_set_error(cs);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01006558 if (h2s_send_rst_stream(h2s->h2c, h2s) > 0)
Willy Tarreau00dd0782018-03-01 16:31:34 +01006559 h2s_close(h2s);
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006560 }
6561
Christopher Faulet9b79a102019-07-15 11:22:56 +02006562 htx_to_buf(htx, buf);
Olivier Houchardd846c262018-10-19 17:24:29 +02006563
Olivier Houchard7505f942018-08-21 18:10:44 +02006564 if (total > 0) {
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006565 if (!(h2s->h2c->wait_event.events & SUB_RETRY_SEND)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006566 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 +02006567 tasklet_wakeup(h2s->h2c->wait_event.tasklet);
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006568 }
Olivier Houchardd846c262018-10-19 17:24:29 +02006569
Olivier Houchard7505f942018-08-21 18:10:44 +02006570 }
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01006571 /* If we're waiting for flow control, and we got a shutr on the
6572 * connection, we will never be unlocked, so add an error on
6573 * the conn_stream.
6574 */
6575 if (conn_xprt_read0_pending(h2s->h2c->conn) &&
6576 !b_data(&h2s->h2c->dbuf) &&
6577 (h2s->flags & (H2_SF_BLK_SFCTL | H2_SF_BLK_MFCTL))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006578 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 +01006579 if (cs->flags & CS_FL_EOS)
6580 cs->flags |= CS_FL_ERROR;
6581 else
6582 cs->flags |= CS_FL_ERR_PENDING;
6583 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006584
Willy Tarreau5723f292020-01-10 15:16:57 +01006585 if (total > 0 && !(h2s->flags & H2_SF_BLK_SFCTL) &&
6586 !(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006587 /* Ok we managed to send something, leave the send_list if we were still there */
Olivier Houchardd360ac62019-03-22 17:37:16 +01006588 LIST_DEL_INIT(&h2s->list);
6589 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006590
Willy Tarreau7838a792019-08-12 18:42:03 +02006591 TRACE_LEAVE(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006592 return total;
Willy Tarreau62f52692017-10-08 23:01:42 +02006593}
6594
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006595/* for debugging with CLI's "show fd" command */
Willy Tarreau8050efe2021-01-21 08:26:06 +01006596static int h2_show_fd(struct buffer *msg, struct connection *conn)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006597{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01006598 struct h2c *h2c = conn->ctx;
Willy Tarreau987c0632018-12-18 10:32:05 +01006599 struct h2s *h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006600 struct eb32_node *node;
6601 int fctl_cnt = 0;
6602 int send_cnt = 0;
6603 int tree_cnt = 0;
6604 int orph_cnt = 0;
Willy Tarreau60f62682019-05-26 11:32:27 +02006605 struct buffer *hmbuf, *tmbuf;
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006606 int ret = 0;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006607
6608 if (!h2c)
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006609 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006610
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006611 list_for_each_entry(h2s, &h2c->fctl_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006612 fctl_cnt++;
6613
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006614 list_for_each_entry(h2s, &h2c->send_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006615 send_cnt++;
6616
Willy Tarreau3af37712018-12-18 14:34:41 +01006617 h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006618 node = eb32_first(&h2c->streams_by_id);
6619 while (node) {
6620 h2s = container_of(node, struct h2s, by_id);
6621 tree_cnt++;
6622 if (!h2s->cs)
6623 orph_cnt++;
6624 node = eb32_next(node);
6625 }
6626
Willy Tarreau60f62682019-05-26 11:32:27 +02006627 hmbuf = br_head(h2c->mbuf);
Willy Tarreaubcc45952019-05-26 10:05:50 +02006628 tmbuf = br_tail(h2c->mbuf);
Willy Tarreauab2ec452019-08-30 07:07:08 +02006629 chunk_appendf(msg, " h2c.st0=%s .err=%d .maxid=%d .lastid=%d .flg=0x%04x"
Willy Tarreau987c0632018-12-18 10:32:05 +01006630 " .nbst=%u .nbcs=%u .fctl_cnt=%d .send_cnt=%d .tree_cnt=%d"
Willy Tarreau60f62682019-05-26 11:32:27 +02006631 " .orph_cnt=%d .sub=%d .dsi=%d .dbuf=%u@%p+%u/%u .msi=%d"
6632 " .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]",
Willy Tarreauab2ec452019-08-30 07:07:08 +02006633 h2c_st_to_str(h2c->st0), h2c->errcode, h2c->max_id, h2c->last_sid, h2c->flags,
Willy Tarreau616ac812018-07-24 14:12:42 +02006634 h2c->nb_streams, h2c->nb_cs, fctl_cnt, send_cnt, tree_cnt, orph_cnt,
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006635 h2c->wait_event.events, h2c->dsi,
Willy Tarreau987c0632018-12-18 10:32:05 +01006636 (unsigned int)b_data(&h2c->dbuf), b_orig(&h2c->dbuf),
6637 (unsigned int)b_head_ofs(&h2c->dbuf), (unsigned int)b_size(&h2c->dbuf),
6638 h2c->msi,
Willy Tarreau60f62682019-05-26 11:32:27 +02006639 br_head_idx(h2c->mbuf), br_tail_idx(h2c->mbuf), br_size(h2c->mbuf),
6640 (unsigned int)b_data(hmbuf), b_orig(hmbuf),
6641 (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf),
Willy Tarreaubcc45952019-05-26 10:05:50 +02006642 (unsigned int)b_data(tmbuf), b_orig(tmbuf),
6643 (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf));
Willy Tarreau987c0632018-12-18 10:32:05 +01006644
6645 if (h2s) {
Willy Tarreaued4464e2021-01-20 15:50:03 +01006646 chunk_appendf(msg, " last_h2s=%p .id=%d .st=%s .flg=0x%04x .rxbuf=%u@%p+%u/%u .cs=%p",
Willy Tarreauab2ec452019-08-30 07:07:08 +02006647 h2s, h2s->id, h2s_st_to_str(h2s->st), h2s->flags,
Willy Tarreau987c0632018-12-18 10:32:05 +01006648 (unsigned int)b_data(&h2s->rxbuf), b_orig(&h2s->rxbuf),
6649 (unsigned int)b_head_ofs(&h2s->rxbuf), (unsigned int)b_size(&h2s->rxbuf),
6650 h2s->cs);
6651 if (h2s->cs)
Willy Tarreau98e40b92021-01-20 16:27:01 +01006652 chunk_appendf(msg, "(.flg=0x%08x .data=%p)",
Willy Tarreau987c0632018-12-18 10:32:05 +01006653 h2s->cs->flags, h2s->cs->data);
Willy Tarreau98e40b92021-01-20 16:27:01 +01006654
6655 chunk_appendf(&trash, " .subs=%p", h2s->subs);
6656 if (h2s->subs) {
Christopher Faulet6c93c4e2021-02-25 10:06:29 +01006657 chunk_appendf(&trash, "(ev=%d tl=%p", h2s->subs->events, h2s->subs->tasklet);
6658 chunk_appendf(&trash, " tl.calls=%d tl.ctx=%p tl.fct=",
6659 h2s->subs->tasklet->calls,
6660 h2s->subs->tasklet->context);
6661 if (h2s->subs->tasklet->calls >= 1000000)
6662 ret = 1;
6663 resolve_sym_name(&trash, NULL, h2s->subs->tasklet->process);
6664 chunk_appendf(&trash, ")");
Willy Tarreau98e40b92021-01-20 16:27:01 +01006665 }
Willy Tarreau987c0632018-12-18 10:32:05 +01006666 }
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006667 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006668}
Willy Tarreau62f52692017-10-08 23:01:42 +02006669
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006670/* Migrate the the connection to the current thread.
6671 * Return 0 if successful, non-zero otherwise.
6672 * Expected to be called with the old thread lock held.
6673 */
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006674static int h2_takeover(struct connection *conn, int orig_tid)
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006675{
6676 struct h2c *h2c = conn->ctx;
Willy Tarreau617e80f2020-07-01 16:39:33 +02006677 struct task *task;
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006678
6679 if (fd_takeover(conn->handle.fd, conn) != 0)
6680 return -1;
Olivier Houcharda74bb7e2020-07-03 14:01:21 +02006681
6682 if (conn->xprt->takeover && conn->xprt->takeover(conn, conn->xprt_ctx, orig_tid) != 0) {
6683 /* We failed to takeover the xprt, even if the connection may
6684 * still be valid, flag it as error'd, as we have already
6685 * taken over the fd, and wake the tasklet, so that it will
6686 * destroy it.
6687 */
6688 conn->flags |= CO_FL_ERROR;
6689 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
6690 return -1;
6691 }
6692
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006693 if (h2c->wait_event.events)
6694 h2c->conn->xprt->unsubscribe(h2c->conn, h2c->conn->xprt_ctx,
6695 h2c->wait_event.events, &h2c->wait_event);
6696 /* To let the tasklet know it should free itself, and do nothing else,
6697 * set its context to NULL.
6698 */
6699 h2c->wait_event.tasklet->context = NULL;
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006700 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
Willy Tarreau617e80f2020-07-01 16:39:33 +02006701
6702 task = h2c->task;
6703 if (task) {
6704 task->context = NULL;
6705 h2c->task = NULL;
6706 __ha_barrier_store();
6707 task_kill(task);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006708
6709 h2c->task = task_new(tid_bit);
6710 if (!h2c->task) {
6711 h2_release(h2c);
6712 return -1;
6713 }
6714 h2c->task->process = h2_timeout_task;
6715 h2c->task->context = h2c;
6716 }
6717 h2c->wait_event.tasklet = tasklet_new();
6718 if (!h2c->wait_event.tasklet) {
6719 h2_release(h2c);
6720 return -1;
6721 }
6722 h2c->wait_event.tasklet->process = h2_io_cb;
6723 h2c->wait_event.tasklet->context = h2c;
6724 h2c->conn->xprt->subscribe(h2c->conn, h2c->conn->xprt_ctx,
6725 SUB_RETRY_RECV, &h2c->wait_event);
6726
6727 return 0;
6728}
6729
Willy Tarreau62f52692017-10-08 23:01:42 +02006730/*******************************************************/
6731/* functions below are dedicated to the config parsers */
6732/*******************************************************/
6733
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006734/* config parser for global "tune.h2.header-table-size" */
6735static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006736 const struct proxy *defpx, const char *file, int line,
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006737 char **err)
6738{
6739 if (too_many_args(1, args, err, NULL))
6740 return -1;
6741
6742 h2_settings_header_table_size = atoi(args[1]);
6743 if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) {
6744 memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]);
6745 return -1;
6746 }
6747 return 0;
6748}
Willy Tarreau62f52692017-10-08 23:01:42 +02006749
Willy Tarreaue6baec02017-07-27 11:45:11 +02006750/* config parser for global "tune.h2.initial-window-size" */
6751static int h2_parse_initial_window_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006752 const struct proxy *defpx, const char *file, int line,
Willy Tarreaue6baec02017-07-27 11:45:11 +02006753 char **err)
6754{
6755 if (too_many_args(1, args, err, NULL))
6756 return -1;
6757
6758 h2_settings_initial_window_size = atoi(args[1]);
6759 if (h2_settings_initial_window_size < 0) {
6760 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6761 return -1;
6762 }
6763 return 0;
6764}
6765
Willy Tarreau5242ef82017-07-27 11:47:28 +02006766/* config parser for global "tune.h2.max-concurrent-streams" */
6767static int h2_parse_max_concurrent_streams(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006768 const struct proxy *defpx, const char *file, int line,
Willy Tarreau5242ef82017-07-27 11:47:28 +02006769 char **err)
6770{
6771 if (too_many_args(1, args, err, NULL))
6772 return -1;
6773
6774 h2_settings_max_concurrent_streams = atoi(args[1]);
Willy Tarreau5a490b62019-01-31 10:39:51 +01006775 if ((int)h2_settings_max_concurrent_streams < 0) {
Willy Tarreau5242ef82017-07-27 11:47:28 +02006776 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6777 return -1;
6778 }
6779 return 0;
6780}
6781
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006782/* config parser for global "tune.h2.max-frame-size" */
6783static int h2_parse_max_frame_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006784 const struct proxy *defpx, const char *file, int line,
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006785 char **err)
6786{
6787 if (too_many_args(1, args, err, NULL))
6788 return -1;
6789
6790 h2_settings_max_frame_size = atoi(args[1]);
6791 if (h2_settings_max_frame_size < 16384 || h2_settings_max_frame_size > 16777215) {
6792 memprintf(err, "'%s' expects a numeric value between 16384 and 16777215.", args[0]);
6793 return -1;
6794 }
6795 return 0;
6796}
6797
Willy Tarreau62f52692017-10-08 23:01:42 +02006798
6799/****************************************/
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05006800/* MUX initialization and instantiation */
Willy Tarreau62f52692017-10-08 23:01:42 +02006801/***************************************/
6802
6803/* The mux operations */
Willy Tarreau680b2bd2018-11-27 07:30:17 +01006804static const struct mux_ops h2_ops = {
Willy Tarreau62f52692017-10-08 23:01:42 +02006805 .init = h2_init,
Olivier Houchard21df6cc2018-09-14 23:21:44 +02006806 .wake = h2_wake,
Willy Tarreau62f52692017-10-08 23:01:42 +02006807 .snd_buf = h2_snd_buf,
Olivier Houchard511efea2018-08-16 15:30:32 +02006808 .rcv_buf = h2_rcv_buf,
Olivier Houchard6ff20392018-07-17 18:46:31 +02006809 .subscribe = h2_subscribe,
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006810 .unsubscribe = h2_unsubscribe,
Willy Tarreau62f52692017-10-08 23:01:42 +02006811 .attach = h2_attach,
Willy Tarreaufafd3982018-11-18 21:29:20 +01006812 .get_first_cs = h2_get_first_cs,
Willy Tarreau62f52692017-10-08 23:01:42 +02006813 .detach = h2_detach,
Olivier Houchard060ed432018-11-06 16:32:42 +01006814 .destroy = h2_destroy,
Olivier Houchardd540b362018-11-05 18:37:53 +01006815 .avail_streams = h2_avail_streams,
Willy Tarreau00f18a32019-01-26 12:19:01 +01006816 .used_streams = h2_used_streams,
Willy Tarreau62f52692017-10-08 23:01:42 +02006817 .shutr = h2_shutr,
6818 .shutw = h2_shutw,
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02006819 .ctl = h2_ctl,
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006820 .show_fd = h2_show_fd,
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006821 .takeover = h2_takeover,
Christopher Fauleta4600572021-03-08 15:28:28 +01006822 .flags = MX_FL_CLEAN_ABRT|MX_FL_HTX|MX_FL_HOL_RISK|MX_FL_NO_UPG,
Willy Tarreau62f52692017-10-08 23:01:42 +02006823 .name = "H2",
6824};
6825
Christopher Faulet32f61c02018-04-10 14:33:41 +02006826static struct mux_proto_list mux_proto_h2 =
Christopher Fauletc985f6c2019-07-15 11:42:52 +02006827 { .token = IST("h2"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BOTH, .mux = &h2_ops };
Willy Tarreau62f52692017-10-08 23:01:42 +02006828
Willy Tarreau0108d902018-11-25 19:14:37 +01006829INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2);
6830
Willy Tarreau62f52692017-10-08 23:01:42 +02006831/* config keyword parsers */
6832static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006833 { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size },
Willy Tarreaue6baec02017-07-27 11:45:11 +02006834 { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size },
Willy Tarreau5242ef82017-07-27 11:47:28 +02006835 { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006836 { CFG_GLOBAL, "tune.h2.max-frame-size", h2_parse_max_frame_size },
Willy Tarreau62f52692017-10-08 23:01:42 +02006837 { 0, NULL, NULL }
6838}};
6839
Willy Tarreau0108d902018-11-25 19:14:37 +01006840INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
Willy Tarreau2bdcc702020-05-19 11:31:11 +02006841
6842/* initialize internal structs after the config is parsed.
6843 * Returns zero on success, non-zero on error.
6844 */
6845static int init_h2()
6846{
6847 pool_head_hpack_tbl = create_pool("hpack_tbl",
6848 h2_settings_header_table_size,
6849 MEM_F_SHARED|MEM_F_EXACT);
Christopher Faulet52140992020-11-06 15:23:39 +01006850 if (!pool_head_hpack_tbl) {
6851 ha_alert("failed to allocate hpack_tbl memory pool\n");
6852 return (ERR_ALERT | ERR_FATAL);
6853 }
6854 return ERR_NONE;
Willy Tarreau2bdcc702020-05-19 11:31:11 +02006855}
6856
6857REGISTER_POST_CHECK(init_h2);