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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
692 * connection may expire when:
693 * - it has no stream
694 * - it has data in the mux buffer
695 * - it has streams in the blocked list
696 * - it has streams in the fctl list
697 * - it has streams in the send list
698 * Otherwise it means some streams are waiting in the data layer and it should
699 * not expire.
700 */
701static inline int h2c_may_expire(const struct h2c *h2c)
702{
703 return eb_is_empty(&h2c->streams_by_id) ||
704 br_data(h2c->mbuf) ||
705 !LIST_ISEMPTY(&h2c->blocked_list) ||
706 !LIST_ISEMPTY(&h2c->fctl_list) ||
Willy Tarreaud9464162020-01-10 18:25:07 +0100707 !LIST_ISEMPTY(&h2c->send_list);
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200708}
709
Olivier Houchard7a977432019-03-21 15:47:13 +0100710static __inline int
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200711h2c_is_dead(const struct h2c *h2c)
Olivier Houchard7a977432019-03-21 15:47:13 +0100712{
713 if (eb_is_empty(&h2c->streams_by_id) && /* don't close if streams exist */
714 ((h2c->conn->flags & CO_FL_ERROR) || /* errors close immediately */
715 (h2c->st0 >= H2_CS_ERROR && !h2c->task) || /* a timeout stroke earlier */
716 (!(h2c->conn->owner)) || /* Nobody's left to take care of the connection, drop it now */
Willy Tarreau662fafc2019-05-26 09:43:07 +0200717 (!br_data(h2c->mbuf) && /* mux buffer empty, also process clean events below */
Olivier Houchard7a977432019-03-21 15:47:13 +0100718 (conn_xprt_read0_pending(h2c->conn) ||
719 (h2c->last_sid >= 0 && h2c->max_id >= h2c->last_sid)))))
720 return 1;
721
722 return 0;
Olivier Houchard7a977432019-03-21 15:47:13 +0100723}
724
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200725/*****************************************************/
726/* functions below are for dynamic buffer management */
727/*****************************************************/
728
Willy Tarreau315d8072017-12-10 22:17:57 +0100729/* indicates whether or not the we may call the h2_recv() function to attempt
730 * to receive data into the buffer and/or demux pending data. The condition is
731 * a bit complex due to some API limits for now. The rules are the following :
732 * - if an error or a shutdown was detected on the connection and the buffer
733 * is empty, we must not attempt to receive
734 * - if the demux buf failed to be allocated, we must not try to receive and
735 * we know there is nothing pending
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100736 * - if no flag indicates a blocking condition, we may attempt to receive,
737 * regardless of whether the demux buffer is full or not, so that only
738 * de demux part decides whether or not to block. This is needed because
739 * the connection API indeed prevents us from re-enabling receipt that is
740 * already enabled in a polled state, so we must always immediately stop
741 * as soon as the demux can't proceed so as never to hit an end of read
742 * with data pending in the buffers.
Willy Tarreau315d8072017-12-10 22:17:57 +0100743 * - otherwise must may not attempt
744 */
745static inline int h2_recv_allowed(const struct h2c *h2c)
746{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200747 if (b_data(&h2c->dbuf) == 0 &&
Willy Tarreau315d8072017-12-10 22:17:57 +0100748 (h2c->st0 >= H2_CS_ERROR ||
749 h2c->conn->flags & CO_FL_ERROR ||
750 conn_xprt_read0_pending(h2c->conn)))
751 return 0;
752
753 if (!(h2c->flags & H2_CF_DEM_DALLOC) &&
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100754 !(h2c->flags & H2_CF_DEM_BLOCK_ANY))
Willy Tarreau315d8072017-12-10 22:17:57 +0100755 return 1;
756
757 return 0;
758}
759
Willy Tarreau47b515a2018-12-21 16:09:41 +0100760/* restarts reading on the connection if it was not enabled */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200761static inline void h2c_restart_reading(const struct h2c *h2c, int consider_buffer)
Willy Tarreau47b515a2018-12-21 16:09:41 +0100762{
763 if (!h2_recv_allowed(h2c))
764 return;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200765 if ((!consider_buffer || !b_data(&h2c->dbuf))
766 && (h2c->wait_event.events & SUB_RETRY_RECV))
Willy Tarreau47b515a2018-12-21 16:09:41 +0100767 return;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200768 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau47b515a2018-12-21 16:09:41 +0100769}
770
771
Willy Tarreaufa1d3572019-01-31 10:31:51 +0100772/* returns true if the front connection has too many conn_streams attached */
773static inline int h2_frt_has_too_many_cs(const struct h2c *h2c)
Willy Tarreauf2101912018-07-19 10:11:38 +0200774{
Willy Tarreaua8754662018-12-23 20:43:58 +0100775 return h2c->nb_cs > h2_settings_max_concurrent_streams;
Willy Tarreauf2101912018-07-19 10:11:38 +0200776}
777
Willy Tarreau44e973f2018-03-01 17:49:30 +0100778/* Tries to grab a buffer and to re-enable processing on mux <target>. The h2c
779 * flags are used to figure what buffer was requested. It returns 1 if the
780 * allocation succeeds, in which case the connection is woken up, or 0 if it's
781 * impossible to wake up and we prefer to be woken up later.
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200782 */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100783static int h2_buf_available(void *target)
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200784{
785 struct h2c *h2c = target;
Willy Tarreau0b559072018-02-26 15:22:17 +0100786 struct h2s *h2s;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200787
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100788 if ((h2c->flags & H2_CF_DEM_DALLOC) && b_alloc(&h2c->dbuf)) {
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200789 h2c->flags &= ~H2_CF_DEM_DALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200790 h2c_restart_reading(h2c, 1);
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200791 return 1;
792 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200793
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100794 if ((h2c->flags & H2_CF_MUX_MALLOC) && b_alloc(br_tail(h2c->mbuf))) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100795 h2c->flags &= ~H2_CF_MUX_MALLOC;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200796
797 if (h2c->flags & H2_CF_DEM_MROOM) {
798 h2c->flags &= ~H2_CF_DEM_MROOM;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200799 h2c_restart_reading(h2c, 1);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200800 }
Willy Tarreau14398122017-09-22 14:26:04 +0200801 return 1;
802 }
Willy Tarreau0b559072018-02-26 15:22:17 +0100803
804 if ((h2c->flags & H2_CF_DEM_SALLOC) &&
805 (h2s = h2c_st_by_id(h2c, h2c->dsi)) && h2s->cs &&
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100806 b_alloc(&h2s->rxbuf)) {
Willy Tarreau0b559072018-02-26 15:22:17 +0100807 h2c->flags &= ~H2_CF_DEM_SALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200808 h2c_restart_reading(h2c, 1);
Willy Tarreau0b559072018-02-26 15:22:17 +0100809 return 1;
810 }
811
Willy Tarreau14398122017-09-22 14:26:04 +0200812 return 0;
813}
814
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200815static inline struct buffer *h2_get_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200816{
817 struct buffer *buf = NULL;
818
Willy Tarreau2b718102021-04-21 07:32:39 +0200819 if (likely(!LIST_INLIST(&h2c->buf_wait.list)) &&
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100820 unlikely((buf = b_alloc(bptr)) == NULL)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100821 h2c->buf_wait.target = h2c;
822 h2c->buf_wait.wakeup_cb = h2_buf_available;
Willy Tarreau2b718102021-04-21 07:32:39 +0200823 LIST_APPEND(&ti->buffer_wq, &h2c->buf_wait.list);
Willy Tarreau14398122017-09-22 14:26:04 +0200824 }
825 return buf;
826}
827
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200828static inline void h2_release_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200829{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200830 if (bptr->size) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100831 b_free(bptr);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +0100832 offer_buffers(NULL, 1);
Willy Tarreau14398122017-09-22 14:26:04 +0200833 }
834}
835
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200836static inline void h2_release_mbuf(struct h2c *h2c)
837{
838 struct buffer *buf;
839 unsigned int count = 0;
840
841 while (b_size(buf = br_head_pick(h2c->mbuf))) {
842 b_free(buf);
843 count++;
844 }
845 if (count)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +0100846 offer_buffers(NULL, count);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200847}
848
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100849/* returns the number of allocatable outgoing streams for the connection taking
850 * the last_sid and the reserved ones into account.
851 */
852static inline int h2_streams_left(const struct h2c *h2c)
853{
854 int ret;
855
856 /* consider the number of outgoing streams we're allowed to create before
857 * reaching the last GOAWAY frame seen. max_id is the last assigned id,
858 * nb_reserved is the number of streams which don't yet have an ID.
859 */
860 ret = (h2c->last_sid >= 0) ? h2c->last_sid : 0x7FFFFFFF;
861 ret = (unsigned int)(ret - h2c->max_id) / 2 - h2c->nb_reserved - 1;
862 if (ret < 0)
863 ret = 0;
864 return ret;
865}
866
Willy Tarreau00f18a32019-01-26 12:19:01 +0100867/* returns the number of streams in use on a connection to figure if it's
868 * idle or not. We check nb_cs and not nb_streams as the caller will want
869 * to know if it was the last one after a detach().
870 */
871static int h2_used_streams(struct connection *conn)
872{
873 struct h2c *h2c = conn->ctx;
874
875 return h2c->nb_cs;
876}
877
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100878/* returns the number of concurrent streams available on the connection */
Olivier Houchardd540b362018-11-05 18:37:53 +0100879static int h2_avail_streams(struct connection *conn)
880{
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100881 struct server *srv = objt_server(conn->target);
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100882 struct h2c *h2c = conn->ctx;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100883 int ret1, ret2;
Olivier Houchardd540b362018-11-05 18:37:53 +0100884
Willy Tarreau6afec462019-01-28 06:40:19 +0100885 /* RFC7540#6.8: Receivers of a GOAWAY frame MUST NOT open additional
886 * streams on the connection.
887 */
888 if (h2c->last_sid >= 0)
889 return 0;
890
Willy Tarreauc61966f2019-10-31 15:10:03 +0100891 if (h2c->st0 >= H2_CS_ERROR)
892 return 0;
893
Willy Tarreau86949782019-01-31 10:42:05 +0100894 /* note: may be negative if a SETTINGS frame changes the limit */
895 ret1 = h2c->streams_limit - h2c->nb_streams;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100896
897 /* we must also consider the limit imposed by stream IDs */
898 ret2 = h2_streams_left(h2c);
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100899 ret1 = MIN(ret1, ret2);
Willy Tarreau86949782019-01-31 10:42:05 +0100900 if (ret1 > 0 && srv && srv->max_reuse >= 0) {
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100901 ret2 = h2c->stream_cnt <= srv->max_reuse ? srv->max_reuse - h2c->stream_cnt + 1: 0;
902 ret1 = MIN(ret1, ret2);
903 }
904 return ret1;
Olivier Houchardd540b362018-11-05 18:37:53 +0100905}
906
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200907
Willy Tarreau62f52692017-10-08 23:01:42 +0200908/*****************************************************************/
909/* functions below are dedicated to the mux setup and management */
910/*****************************************************************/
911
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200912/* Initialize the mux once it's attached. For outgoing connections, the context
913 * is already initialized before installing the mux, so we detect incoming
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200914 * connections from the fact that the context is still NULL (even during mux
915 * upgrades). <input> is always used as Input buffer and may contain data. It is
916 * the caller responsibility to not reuse it anymore. Returns < 0 on error.
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200917 */
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200918static int h2_init(struct connection *conn, struct proxy *prx, struct session *sess,
919 struct buffer *input)
Willy Tarreau32218eb2017-09-22 08:07:25 +0200920{
921 struct h2c *h2c;
Willy Tarreauea392822017-10-31 10:02:25 +0100922 struct task *t = NULL;
Christopher Fauletf81ef032019-10-04 15:19:43 +0200923 void *conn_ctx = conn->ctx;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200924
Christopher Fauletf81ef032019-10-04 15:19:43 +0200925 TRACE_ENTER(H2_EV_H2C_NEW);
Willy Tarreau7838a792019-08-12 18:42:03 +0200926
Willy Tarreaubafbe012017-11-24 17:34:44 +0100927 h2c = pool_alloc(pool_head_h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200928 if (!h2c)
mildiscd2d7de2018-10-02 16:44:18 +0200929 goto fail_no_h2c;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200930
Christopher Faulete9b70722019-04-08 10:46:02 +0200931 if (conn_is_back(conn)) {
Willy Tarreau01b44822018-10-03 14:26:37 +0200932 h2c->flags = H2_CF_IS_BACK;
933 h2c->shut_timeout = h2c->timeout = prx->timeout.server;
934 if (tick_isset(prx->timeout.serverfin))
935 h2c->shut_timeout = prx->timeout.serverfin;
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100936
937 h2c->px_counters = EXTRA_COUNTERS_GET(prx->extra_counters_be,
938 &h2_stats_module);
Willy Tarreau01b44822018-10-03 14:26:37 +0200939 } else {
940 h2c->flags = H2_CF_NONE;
941 h2c->shut_timeout = h2c->timeout = prx->timeout.client;
942 if (tick_isset(prx->timeout.clientfin))
943 h2c->shut_timeout = prx->timeout.clientfin;
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100944
945 h2c->px_counters = EXTRA_COUNTERS_GET(prx->extra_counters_fe,
946 &h2_stats_module);
Willy Tarreau01b44822018-10-03 14:26:37 +0200947 }
Willy Tarreau3f133572017-10-31 19:21:06 +0100948
Willy Tarreau0b37d652018-10-03 10:33:02 +0200949 h2c->proxy = prx;
Willy Tarreau33400292017-11-05 11:23:40 +0100950 h2c->task = NULL;
Willy Tarreau3f133572017-10-31 19:21:06 +0100951 if (tick_isset(h2c->timeout)) {
952 t = task_new(tid_bit);
953 if (!t)
954 goto fail;
955
956 h2c->task = t;
957 t->process = h2_timeout_task;
958 t->context = h2c;
959 t->expire = tick_add(now_ms, h2c->timeout);
960 }
Willy Tarreauea392822017-10-31 10:02:25 +0100961
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200962 h2c->wait_event.tasklet = tasklet_new();
963 if (!h2c->wait_event.tasklet)
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200964 goto fail;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200965 h2c->wait_event.tasklet->process = h2_io_cb;
966 h2c->wait_event.tasklet->context = h2c;
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100967 h2c->wait_event.events = 0;
Amaury Denoyelled3a88c12021-05-03 10:47:51 +0200968 if (!conn_is_back(conn)) {
969 /* Connection might already be in the stopping_list if subject
970 * to h1->h2 upgrade.
971 */
972 if (!LIST_INLIST(&conn->stopping_list)) {
973 LIST_APPEND(&mux_stopping_data[tid].list,
974 &conn->stopping_list);
975 }
976 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200977
Willy Tarreau2bdcc702020-05-19 11:31:11 +0200978 h2c->ddht = hpack_dht_alloc();
Willy Tarreau32218eb2017-09-22 08:07:25 +0200979 if (!h2c->ddht)
980 goto fail;
981
982 /* Initialise the context. */
983 h2c->st0 = H2_CS_PREFACE;
984 h2c->conn = conn;
Willy Tarreau2e2083a2019-01-31 10:34:07 +0100985 h2c->streams_limit = h2_settings_max_concurrent_streams;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200986 h2c->max_id = -1;
987 h2c->errcode = H2_ERR_NO_ERROR;
Willy Tarreau97aaa672018-12-23 09:49:04 +0100988 h2c->rcvd_c = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200989 h2c->rcvd_s = 0;
Willy Tarreau49745612017-12-03 18:56:02 +0100990 h2c->nb_streams = 0;
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200991 h2c->nb_cs = 0;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100992 h2c->nb_reserved = 0;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100993 h2c->stream_cnt = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200994
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200995 h2c->dbuf = *input;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200996 h2c->dsi = -1;
997 h2c->msi = -1;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100998
Willy Tarreau32218eb2017-09-22 08:07:25 +0200999 h2c->last_sid = -1;
1000
Willy Tarreau51330962019-05-26 09:38:07 +02001001 br_init(h2c->mbuf, sizeof(h2c->mbuf) / sizeof(h2c->mbuf[0]));
Willy Tarreau32218eb2017-09-22 08:07:25 +02001002 h2c->miw = 65535; /* mux initial window size */
1003 h2c->mws = 65535; /* mux window size */
1004 h2c->mfs = 16384; /* initial max frame size */
Willy Tarreau751f2d02018-10-05 09:35:00 +02001005 h2c->streams_by_id = EB_ROOT;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001006 LIST_INIT(&h2c->send_list);
1007 LIST_INIT(&h2c->fctl_list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +02001008 LIST_INIT(&h2c->blocked_list);
Willy Tarreau90f366b2021-02-20 11:49:49 +01001009 LIST_INIT(&h2c->buf_wait.list);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001010
Christopher Fauletf81ef032019-10-04 15:19:43 +02001011 conn->ctx = h2c;
1012
Willy Tarreaue2f68e92021-06-16 17:47:24 +02001013 TRACE_USER("new H2 connection", H2_EV_H2C_NEW, conn);
1014
Willy Tarreau3f133572017-10-31 19:21:06 +01001015 if (t)
1016 task_queue(t);
Willy Tarreauea392822017-10-31 10:02:25 +01001017
Willy Tarreau01b44822018-10-03 14:26:37 +02001018 if (h2c->flags & H2_CF_IS_BACK) {
1019 /* FIXME: this is temporary, for outgoing connections we need
1020 * to immediately allocate a stream until the code is modified
1021 * so that the caller calls ->attach(). For now the outgoing cs
Christopher Fauletf81ef032019-10-04 15:19:43 +02001022 * is stored as conn->ctx by the caller and saved in conn_ctx.
Willy Tarreau01b44822018-10-03 14:26:37 +02001023 */
1024 struct h2s *h2s;
1025
Christopher Fauletf81ef032019-10-04 15:19:43 +02001026 h2s = h2c_bck_stream_new(h2c, conn_ctx, sess);
Willy Tarreau01b44822018-10-03 14:26:37 +02001027 if (!h2s)
1028 goto fail_stream;
1029 }
1030
Willy Tarreau4781b152021-04-06 13:53:36 +02001031 HA_ATOMIC_INC(&h2c->px_counters->open_conns);
1032 HA_ATOMIC_INC(&h2c->px_counters->total_conns);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001033
Willy Tarreau0f383582018-10-03 14:22:21 +02001034 /* prepare to read something */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02001035 h2c_restart_reading(h2c, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001036 TRACE_LEAVE(H2_EV_H2C_NEW, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001037 return 0;
Willy Tarreau01b44822018-10-03 14:26:37 +02001038 fail_stream:
1039 hpack_dht_free(h2c->ddht);
mildiscd2d7de2018-10-02 16:44:18 +02001040 fail:
Willy Tarreauf6562792019-05-07 19:05:35 +02001041 task_destroy(t);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001042 if (h2c->wait_event.tasklet)
1043 tasklet_free(h2c->wait_event.tasklet);
Willy Tarreaubafbe012017-11-24 17:34:44 +01001044 pool_free(pool_head_h2c, h2c);
mildiscd2d7de2018-10-02 16:44:18 +02001045 fail_no_h2c:
Willy Tarreau8802bf12022-01-12 17:24:26 +01001046 if (!conn_is_back(conn))
1047 LIST_DEL_INIT(&conn->stopping_list);
Christopher Fauletf81ef032019-10-04 15:19:43 +02001048 conn->ctx = conn_ctx; /* restore saved ctx */
1049 TRACE_DEVEL("leaving in error", H2_EV_H2C_NEW|H2_EV_H2C_END|H2_EV_H2C_ERR);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001050 return -1;
1051}
1052
Willy Tarreau751f2d02018-10-05 09:35:00 +02001053/* returns the next allocatable outgoing stream ID for the H2 connection, or
1054 * -1 if no more is allocatable.
1055 */
1056static inline int32_t h2c_get_next_sid(const struct h2c *h2c)
1057{
1058 int32_t id = (h2c->max_id + 1) | 1;
Willy Tarreaua80dca82019-01-24 17:08:28 +01001059
1060 if ((id & 0x80000000U) || (h2c->last_sid >= 0 && id > h2c->last_sid))
Willy Tarreau751f2d02018-10-05 09:35:00 +02001061 id = -1;
1062 return id;
1063}
1064
Willy Tarreau2373acc2017-10-12 17:35:14 +02001065/* returns the stream associated with id <id> or NULL if not found */
1066static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id)
1067{
1068 struct eb32_node *node;
1069
Willy Tarreau751f2d02018-10-05 09:35:00 +02001070 if (id == 0)
1071 return (struct h2s *)h2_closed_stream;
1072
Willy Tarreau2a856182017-05-16 15:20:39 +02001073 if (id > h2c->max_id)
1074 return (struct h2s *)h2_idle_stream;
1075
Willy Tarreau2373acc2017-10-12 17:35:14 +02001076 node = eb32_lookup(&h2c->streams_by_id, id);
1077 if (!node)
Willy Tarreau2a856182017-05-16 15:20:39 +02001078 return (struct h2s *)h2_closed_stream;
Willy Tarreau2373acc2017-10-12 17:35:14 +02001079
1080 return container_of(node, struct h2s, by_id);
1081}
1082
Christopher Faulet73c12072019-04-08 11:23:22 +02001083/* release function. This one should be called to free all resources allocated
1084 * to the mux.
Willy Tarreau62f52692017-10-08 23:01:42 +02001085 */
Christopher Faulet73c12072019-04-08 11:23:22 +02001086static void h2_release(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02001087{
William Dauchy477757c2020-08-07 22:19:23 +02001088 struct connection *conn = NULL;
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001089
Willy Tarreau7838a792019-08-12 18:42:03 +02001090 TRACE_ENTER(H2_EV_H2C_END);
1091
Willy Tarreau32218eb2017-09-22 08:07:25 +02001092 if (h2c) {
Christopher Faulet61840e72019-04-15 09:33:32 +02001093 /* The connection must be aattached to this mux to be released */
1094 if (h2c->conn && h2c->conn->ctx == h2c)
1095 conn = h2c->conn;
1096
Willy Tarreau7838a792019-08-12 18:42:03 +02001097 TRACE_DEVEL("freeing h2c", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001098 hpack_dht_free(h2c->ddht);
Willy Tarreau14398122017-09-22 14:26:04 +02001099
Willy Tarreau2b718102021-04-21 07:32:39 +02001100 if (LIST_INLIST(&h2c->buf_wait.list))
Willy Tarreau90f366b2021-02-20 11:49:49 +01001101 LIST_DEL_INIT(&h2c->buf_wait.list);
Willy Tarreau14398122017-09-22 14:26:04 +02001102
Willy Tarreau44e973f2018-03-01 17:49:30 +01001103 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau2e3c0002019-05-26 09:45:23 +02001104 h2_release_mbuf(h2c);
Willy Tarreau44e973f2018-03-01 17:49:30 +01001105
Willy Tarreauea392822017-10-31 10:02:25 +01001106 if (h2c->task) {
Willy Tarreau0975f112018-03-29 15:22:59 +02001107 h2c->task->context = NULL;
1108 task_wakeup(h2c->task, TASK_WOKEN_OTHER);
Willy Tarreauea392822017-10-31 10:02:25 +01001109 h2c->task = NULL;
1110 }
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001111 if (h2c->wait_event.tasklet)
1112 tasklet_free(h2c->wait_event.tasklet);
Christopher Faulet21d849f2019-09-18 11:07:20 +02001113 if (conn && h2c->wait_event.events != 0)
Olivier Houcharde179d0e2019-03-21 18:27:17 +01001114 conn->xprt->unsubscribe(conn, conn->xprt_ctx, h2c->wait_event.events,
Christopher Faulet21d849f2019-09-18 11:07:20 +02001115 &h2c->wait_event);
Willy Tarreauea392822017-10-31 10:02:25 +01001116
Willy Tarreau4781b152021-04-06 13:53:36 +02001117 HA_ATOMIC_DEC(&h2c->px_counters->open_conns);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001118
Willy Tarreaubafbe012017-11-24 17:34:44 +01001119 pool_free(pool_head_h2c, h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001120 }
1121
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001122 if (conn) {
Amaury Denoyelled3a88c12021-05-03 10:47:51 +02001123 if (!conn_is_back(conn))
1124 LIST_DEL_INIT(&conn->stopping_list);
1125
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001126 conn->mux = NULL;
1127 conn->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02001128 TRACE_DEVEL("freeing conn", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001129
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001130 conn_stop_tracking(conn);
Willy Tarreaudaa0e5f2021-10-21 22:24:31 +02001131
1132 /* there might be a GOAWAY frame still pending in the TCP
1133 * stack, and if the peer continues to send (i.e. window
1134 * updates etc), this can result in losing the GOAWAY. For
1135 * this reason we try to drain anything received in between.
1136 */
1137 conn->flags |= CO_FL_WANT_DRAIN;
1138
1139 conn_xprt_shutw(conn);
1140 conn_xprt_close(conn);
1141 conn_sock_shutw(conn, !conn_is_back(conn));
1142 conn_ctrl_close(conn);
1143
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001144 if (conn->destroy_cb)
1145 conn->destroy_cb(conn);
1146 conn_free(conn);
1147 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001148
1149 TRACE_LEAVE(H2_EV_H2C_END);
Willy Tarreau62f52692017-10-08 23:01:42 +02001150}
1151
1152
Willy Tarreau71681172017-10-23 14:39:06 +02001153/******************************************************/
1154/* functions below are for the H2 protocol processing */
1155/******************************************************/
1156
1157/* returns the stream if of stream <h2s> or 0 if <h2s> is NULL */
Willy Tarreau1f094672017-11-20 21:27:45 +01001158static inline __maybe_unused int h2s_id(const struct h2s *h2s)
Willy Tarreau71681172017-10-23 14:39:06 +02001159{
1160 return h2s ? h2s->id : 0;
1161}
1162
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001163/* returns the sum of the stream's own window size and the mux's initial
1164 * window, which together form the stream's effective window size.
1165 */
1166static inline int h2s_mws(const struct h2s *h2s)
1167{
1168 return h2s->sws + h2s->h2c->miw;
1169}
1170
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001171/* returns true of the mux is currently busy as seen from stream <h2s> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001172static inline __maybe_unused int h2c_mux_busy(const struct h2c *h2c, const struct h2s *h2s)
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001173{
1174 if (h2c->msi < 0)
1175 return 0;
1176
1177 if (h2c->msi == h2s_id(h2s))
1178 return 0;
1179
1180 return 1;
1181}
1182
Willy Tarreau741d6df2017-10-17 08:00:59 +02001183/* marks an error on the connection */
Willy Tarreau1f094672017-11-20 21:27:45 +01001184static inline __maybe_unused void h2c_error(struct h2c *h2c, enum h2_err err)
Willy Tarreau741d6df2017-10-17 08:00:59 +02001185{
Willy Tarreau022e5e52020-09-10 09:33:15 +02001186 TRACE_POINT(H2_EV_H2C_ERR, h2c->conn, 0, 0, (void *)(long)(err));
Willy Tarreau741d6df2017-10-17 08:00:59 +02001187 h2c->errcode = err;
1188 h2c->st0 = H2_CS_ERROR;
1189}
1190
Willy Tarreau175cebb2019-01-24 10:02:24 +01001191/* marks an error on the stream. It may also update an already closed stream
1192 * (e.g. to report an error after an RST was received).
1193 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001194static inline __maybe_unused void h2s_error(struct h2s *h2s, enum h2_err err)
Willy Tarreau2e43f082017-10-17 08:03:59 +02001195{
Willy Tarreau175cebb2019-01-24 10:02:24 +01001196 if (h2s->id && h2s->st != H2_SS_ERROR) {
Willy Tarreau022e5e52020-09-10 09:33:15 +02001197 TRACE_POINT(H2_EV_H2S_ERR, h2s->h2c->conn, h2s, 0, (void *)(long)(err));
Willy Tarreau2e43f082017-10-17 08:03:59 +02001198 h2s->errcode = err;
Willy Tarreau175cebb2019-01-24 10:02:24 +01001199 if (h2s->st < H2_SS_ERROR)
1200 h2s->st = H2_SS_ERROR;
Willy Tarreauec988c72018-12-19 18:00:29 +01001201 if (h2s->cs)
1202 cs_set_error(h2s->cs);
Willy Tarreau2e43f082017-10-17 08:03:59 +02001203 }
1204}
1205
Willy Tarreau7e094452018-12-19 18:08:52 +01001206/* attempt to notify the data layer of recv availability */
1207static void __maybe_unused h2s_notify_recv(struct h2s *h2s)
1208{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001209 if (h2s->subs && h2s->subs->events & SUB_RETRY_RECV) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001210 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01001211 tasklet_wakeup(h2s->subs->tasklet);
1212 h2s->subs->events &= ~SUB_RETRY_RECV;
1213 if (!h2s->subs->events)
1214 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001215 }
1216}
1217
1218/* attempt to notify the data layer of send availability */
1219static void __maybe_unused h2s_notify_send(struct h2s *h2s)
1220{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001221 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001222 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01001223 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01001224 tasklet_wakeup(h2s->subs->tasklet);
1225 h2s->subs->events &= ~SUB_RETRY_SEND;
1226 if (!h2s->subs->events)
1227 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001228 }
Willy Tarreau5723f292020-01-10 15:16:57 +01001229 else if (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) {
1230 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
1231 tasklet_wakeup(h2s->shut_tl);
1232 }
Willy Tarreau7e094452018-12-19 18:08:52 +01001233}
1234
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001235/* alerts the data layer, trying to wake it up by all means, following
1236 * this sequence :
1237 * - if the h2s' data layer is subscribed to recv, then it's woken up for recv
1238 * - if its subscribed to send, then it's woken up for send
1239 * - if it was subscribed to neither, its ->wake() callback is called
1240 * It is safe to call this function with a closed stream which doesn't have a
1241 * conn_stream anymore.
1242 */
1243static void __maybe_unused h2s_alert(struct h2s *h2s)
1244{
Willy Tarreau7838a792019-08-12 18:42:03 +02001245 TRACE_ENTER(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
1246
Willy Tarreauf96508a2020-01-10 11:12:48 +01001247 if (h2s->subs ||
Willy Tarreau5723f292020-01-10 15:16:57 +01001248 (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW))) {
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001249 h2s_notify_recv(h2s);
1250 h2s_notify_send(h2s);
1251 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001252 else if (h2s->cs && h2s->cs->data_cb->wake != NULL) {
1253 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001254 h2s->cs->data_cb->wake(h2s->cs);
Willy Tarreau7838a792019-08-12 18:42:03 +02001255 }
1256
1257 TRACE_LEAVE(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001258}
1259
Willy Tarreaue4820742017-07-27 13:37:23 +02001260/* writes the 24-bit frame size <len> at address <frame> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001261static inline __maybe_unused void h2_set_frame_size(void *frame, uint32_t len)
Willy Tarreaue4820742017-07-27 13:37:23 +02001262{
1263 uint8_t *out = frame;
1264
1265 *out = len >> 16;
1266 write_n16(out + 1, len);
1267}
1268
Willy Tarreau54c15062017-10-10 17:10:03 +02001269/* reads <bytes> bytes from buffer <b> starting at relative offset <o> from the
1270 * current pointer, dealing with wrapping, and stores the result in <dst>. It's
1271 * the caller's responsibility to verify that there are at least <bytes> bytes
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001272 * available in the buffer's input prior to calling this function. The buffer
1273 * is assumed not to hold any output data.
Willy Tarreau54c15062017-10-10 17:10:03 +02001274 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001275static inline __maybe_unused void h2_get_buf_bytes(void *dst, size_t bytes,
Willy Tarreau54c15062017-10-10 17:10:03 +02001276 const struct buffer *b, int o)
1277{
Willy Tarreau591d4452018-06-15 17:21:00 +02001278 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 +02001279}
1280
Willy Tarreau1f094672017-11-20 21:27:45 +01001281static inline __maybe_unused uint16_t h2_get_n16(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001282{
Willy Tarreau591d4452018-06-15 17:21:00 +02001283 return readv_n16(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001284}
1285
Willy Tarreau1f094672017-11-20 21:27:45 +01001286static inline __maybe_unused uint32_t h2_get_n32(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001287{
Willy Tarreau591d4452018-06-15 17:21:00 +02001288 return readv_n32(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001289}
1290
Willy Tarreau1f094672017-11-20 21:27:45 +01001291static inline __maybe_unused uint64_t h2_get_n64(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001292{
Willy Tarreau591d4452018-06-15 17:21:00 +02001293 return readv_n64(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001294}
1295
1296
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001297/* Peeks an H2 frame header from offset <o> of buffer <b> into descriptor <h>.
1298 * The algorithm is not obvious. It turns out that H2 headers are neither
1299 * aligned nor do they use regular sizes. And to add to the trouble, the buffer
1300 * may wrap so each byte read must be checked. The header is formed like this :
Willy Tarreau715d5312017-07-11 15:20:24 +02001301 *
1302 * b0 b1 b2 b3 b4 b5..b8
1303 * +----------+---------+--------+----+----+----------------------+
1304 * |len[23:16]|len[15:8]|len[7:0]|type|flag|sid[31:0] (big endian)|
1305 * +----------+---------+--------+----+----+----------------------+
1306 *
1307 * Here we read a big-endian 64 bit word from h[1]. This way in a single read
1308 * we get the sid properly aligned and ordered, and 16 bits of len properly
1309 * ordered as well. The type and flags can be extracted using bit shifts from
1310 * the word, and only one extra read is needed to fetch len[16:23].
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001311 * Returns zero if some bytes are missing, otherwise non-zero on success. The
1312 * buffer is assumed not to contain any output data.
Willy Tarreau715d5312017-07-11 15:20:24 +02001313 */
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001314static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, int o, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001315{
1316 uint64_t w;
1317
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001318 if (b_data(b) < o + 9)
Willy Tarreau715d5312017-07-11 15:20:24 +02001319 return 0;
1320
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001321 w = h2_get_n64(b, o + 1);
1322 h->len = *(uint8_t*)b_peek(b, o) << 16;
Willy Tarreau715d5312017-07-11 15:20:24 +02001323 h->sid = w & 0x7FFFFFFF; /* RFC7540#4.1: R bit must be ignored */
1324 h->ff = w >> 32;
1325 h->ft = w >> 40;
1326 h->len += w >> 48;
1327 return 1;
1328}
1329
1330/* skip the next 9 bytes corresponding to the frame header possibly parsed by
1331 * h2_peek_frame_hdr() above.
1332 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001333static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b)
Willy Tarreau715d5312017-07-11 15:20:24 +02001334{
Willy Tarreaue5f12ce2018-06-15 10:28:05 +02001335 b_del(b, 9);
Willy Tarreau715d5312017-07-11 15:20:24 +02001336}
1337
1338/* same as above, automatically advances the buffer on success */
Willy Tarreau1f094672017-11-20 21:27:45 +01001339static inline __maybe_unused int h2_get_frame_hdr(struct buffer *b, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001340{
1341 int ret;
1342
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001343 ret = h2_peek_frame_hdr(b, 0, h);
Willy Tarreau715d5312017-07-11 15:20:24 +02001344 if (ret > 0)
1345 h2_skip_frame_hdr(b);
1346 return ret;
1347}
1348
Willy Tarreaucb985a42019-10-07 16:56:34 +02001349
1350/* try to fragment the headers frame present at the beginning of buffer <b>,
1351 * enforcing a limit of <mfs> bytes per frame. Returns 0 on failure, 1 on
1352 * success. Typical causes of failure include a buffer not large enough to
1353 * add extra frame headers. The existing frame size is read in the current
1354 * frame. Its EH flag will be cleared if CONTINUATION frames need to be added,
1355 * and its length will be adjusted. The stream ID for continuation frames will
1356 * be copied from the initial frame's.
1357 */
1358static int h2_fragment_headers(struct buffer *b, uint32_t mfs)
1359{
1360 size_t remain = b->data - 9;
1361 int extra_frames = (remain - 1) / mfs;
1362 size_t fsize;
1363 char *fptr;
1364 int frame;
1365
1366 if (b->data <= mfs + 9)
1367 return 1;
1368
1369 /* Too large a frame, we need to fragment it using CONTINUATION
1370 * frames. We start from the end and move tails as needed.
1371 */
1372 if (b->data + extra_frames * 9 > b->size)
1373 return 0;
1374
1375 for (frame = extra_frames; frame; frame--) {
1376 fsize = ((remain - 1) % mfs) + 1;
1377 remain -= fsize;
1378
1379 /* move data */
1380 fptr = b->area + 9 + remain + (frame - 1) * 9;
1381 memmove(fptr + 9, b->area + 9 + remain, fsize);
1382 b->data += 9;
1383
1384 /* write new frame header */
1385 h2_set_frame_size(fptr, fsize);
1386 fptr[3] = H2_FT_CONTINUATION;
1387 fptr[4] = (frame == extra_frames) ? H2_F_HEADERS_END_HEADERS : 0;
1388 write_n32(fptr + 5, read_n32(b->area + 5));
1389 }
1390
1391 b->area[4] &= ~H2_F_HEADERS_END_HEADERS;
1392 h2_set_frame_size(b->area, remain);
1393 return 1;
1394}
1395
1396
Willy Tarreau00dd0782018-03-01 16:31:34 +01001397/* marks stream <h2s> as CLOSED and decrement the number of active streams for
1398 * its connection if the stream was not yet closed. Please use this exclusively
1399 * before closing a stream to ensure stream count is well maintained.
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001400 */
Willy Tarreau00dd0782018-03-01 16:31:34 +01001401static inline void h2s_close(struct h2s *h2s)
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001402{
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001403 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001404 TRACE_ENTER(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001405 h2s->h2c->nb_streams--;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001406 if (!h2s->id)
1407 h2s->h2c->nb_reserved--;
Willy Tarreaua27db382019-03-25 18:13:16 +01001408 if (h2s->cs) {
Willy Tarreaua27db382019-03-25 18:13:16 +01001409 if (!(h2s->cs->flags & CS_FL_EOS) && !b_data(&h2s->rxbuf))
1410 h2s_notify_recv(h2s);
1411 }
Willy Tarreau4781b152021-04-06 13:53:36 +02001412 HA_ATOMIC_DEC(&h2s->h2c->px_counters->open_streams);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001413
Willy Tarreau7838a792019-08-12 18:42:03 +02001414 TRACE_LEAVE(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001415 }
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001416 h2s->st = H2_SS_CLOSED;
1417}
1418
Willy Tarreau71049cc2018-03-28 13:56:39 +02001419/* detaches an H2 stream from its H2C and releases it to the H2S pool. */
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001420/* h2s_destroy should only ever be called by the thread that owns the stream,
1421 * that means that a tasklet should be used if we want to destroy the h2s
1422 * from another thread
1423 */
Willy Tarreau71049cc2018-03-28 13:56:39 +02001424static void h2s_destroy(struct h2s *h2s)
Willy Tarreau0a10de62018-03-01 16:27:53 +01001425{
Willy Tarreau7838a792019-08-12 18:42:03 +02001426 struct connection *conn = h2s->h2c->conn;
1427
1428 TRACE_ENTER(H2_EV_H2S_END, conn, h2s);
1429
Willy Tarreau0a10de62018-03-01 16:27:53 +01001430 h2s_close(h2s);
1431 eb32_delete(&h2s->by_id);
Olivier Houchard638b7992018-08-16 15:41:52 +02001432 if (b_size(&h2s->rxbuf)) {
1433 b_free(&h2s->rxbuf);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01001434 offer_buffers(NULL, 1);
Olivier Houchard638b7992018-08-16 15:41:52 +02001435 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001436
1437 if (h2s->subs)
1438 h2s->subs->events = 0;
1439
Joseph Herlantd77575d2018-11-25 10:54:45 -08001440 /* There's no need to explicitly call unsubscribe here, the only
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001441 * reference left would be in the h2c send_list/fctl_list, and if
1442 * we're in it, we're getting out anyway
1443 */
Olivier Houchardd360ac62019-03-22 17:37:16 +01001444 LIST_DEL_INIT(&h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01001445
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001446 /* ditto, calling tasklet_free() here should be ok */
Willy Tarreau5723f292020-01-10 15:16:57 +01001447 tasklet_free(h2s->shut_tl);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001448 pool_free(pool_head_h2s, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001449
1450 TRACE_LEAVE(H2_EV_H2S_END, conn);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001451}
1452
Willy Tarreaua8e49542018-10-03 18:53:55 +02001453/* allocates a new stream <id> for connection <h2c> and adds it into h2c's
1454 * stream tree. In case of error, nothing is added and NULL is returned. The
1455 * causes of errors can be any failed memory allocation. The caller is
1456 * responsible for checking if the connection may support an extra stream
1457 * prior to calling this function.
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001458 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02001459static struct h2s *h2s_new(struct h2c *h2c, int id)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001460{
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001461 struct h2s *h2s;
1462
Willy Tarreau7838a792019-08-12 18:42:03 +02001463 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1464
Willy Tarreaubafbe012017-11-24 17:34:44 +01001465 h2s = pool_alloc(pool_head_h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001466 if (!h2s)
1467 goto out;
1468
Willy Tarreau5723f292020-01-10 15:16:57 +01001469 h2s->shut_tl = tasklet_new();
1470 if (!h2s->shut_tl) {
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001471 pool_free(pool_head_h2s, h2s);
1472 goto out;
1473 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001474 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01001475 h2s->shut_tl->process = h2_deferred_shut;
1476 h2s->shut_tl->context = h2s;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001477 LIST_INIT(&h2s->list);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001478 h2s->h2c = h2c;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001479 h2s->cs = NULL;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001480 h2s->sws = 0;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001481 h2s->flags = H2_SF_NONE;
1482 h2s->errcode = H2_ERR_NO_ERROR;
1483 h2s->st = H2_SS_IDLE;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02001484 h2s->status = 0;
Willy Tarreau1915ca22019-01-24 11:49:37 +01001485 h2s->body_len = 0;
Olivier Houchard638b7992018-08-16 15:41:52 +02001486 h2s->rxbuf = BUF_NULL;
Amaury Denoyelle74162742020-12-11 17:53:05 +01001487 memset(h2s->upgrade_protocol, 0, sizeof(h2s->upgrade_protocol));
Willy Tarreau751f2d02018-10-05 09:35:00 +02001488
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001489 h2s->by_id.key = h2s->id = id;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001490 if (id > 0)
1491 h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001492 else
1493 h2c->nb_reserved++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001494
1495 eb32_insert(&h2c->streams_by_id, &h2s->by_id);
Willy Tarreau49745612017-12-03 18:56:02 +01001496 h2c->nb_streams++;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001497 h2c->stream_cnt++;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001498
Willy Tarreau4781b152021-04-06 13:53:36 +02001499 HA_ATOMIC_INC(&h2c->px_counters->open_streams);
1500 HA_ATOMIC_INC(&h2c->px_counters->total_streams);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001501
Willy Tarreau7838a792019-08-12 18:42:03 +02001502 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001503 return h2s;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001504 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001505 TRACE_DEVEL("leaving in error", H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001506 return NULL;
1507}
1508
1509/* creates a new stream <id> on the h2c connection and returns it, or NULL in
Christopher Faulet7d013e72020-12-15 16:56:50 +01001510 * case of memory allocation error. <input> is used as input buffer for the new
1511 * stream. On success, it is transferred to the stream and the mux is no longer
1512 * responsible of it. On error, <input> is unchanged, thus the mux must still
1513 * take care of it.
Willy Tarreaua8e49542018-10-03 18:53:55 +02001514 */
Amaury Denoyelleee7fcd52021-10-18 14:45:49 +02001515static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id, struct buffer *input, uint32_t flags)
Willy Tarreaua8e49542018-10-03 18:53:55 +02001516{
1517 struct session *sess = h2c->conn->owner;
1518 struct conn_stream *cs;
1519 struct h2s *h2s;
1520
Willy Tarreau7838a792019-08-12 18:42:03 +02001521 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1522
Willy Tarreaua8e49542018-10-03 18:53:55 +02001523 if (h2c->nb_streams >= h2_settings_max_concurrent_streams)
1524 goto out;
1525
1526 h2s = h2s_new(h2c, id);
1527 if (!h2s)
1528 goto out;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001529
Christopher Faulet236c93b2020-07-02 09:19:54 +02001530 cs = cs_new(h2c->conn, h2c->conn->target);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001531 if (!cs)
1532 goto out_close;
1533
Olivier Houchard746fb772018-12-15 19:42:00 +01001534 cs->flags |= CS_FL_NOT_FIRST;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001535 h2s->cs = cs;
1536 cs->ctx = h2s;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001537 h2c->nb_cs++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001538
Amaury Denoyelleee7fcd52021-10-18 14:45:49 +02001539 /* FIXME wrong analogy between ext-connect and websocket, this need to
1540 * be refine.
1541 */
1542 if (flags & H2_SF_EXT_CONNECT_RCVD)
1543 cs->flags |= CS_FL_WEBSOCKET;
1544
Willy Tarreaua217df92022-02-04 09:05:37 +01001545 /* The stream will record the request's accept date (which is either the
1546 * end of the connection's or the date immediately after the previous
1547 * request) and the idle time, which is the delay since the previous
1548 * request. We can set the value now, it will be copied by stream_new().
1549 */
1550 sess->t_idle = tv_ms_elapsed(&sess->tv_accept, &now) - sess->t_handshake;
Christopher Faulet7d013e72020-12-15 16:56:50 +01001551 if (stream_create_from_cs(cs, input) < 0)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001552 goto out_free_cs;
1553
Willy Tarreau590a0512018-09-05 11:56:48 +02001554 /* We want the accept date presented to the next stream to be the one
1555 * we have now, the handshake time to be null (since the next stream
1556 * is not delayed by a handshake), and the idle time to count since
1557 * right now.
1558 */
1559 sess->accept_date = date;
1560 sess->tv_accept = now;
1561 sess->t_handshake = 0;
Willy Tarreaua217df92022-02-04 09:05:37 +01001562 sess->t_idle = 0;
Willy Tarreau590a0512018-09-05 11:56:48 +02001563
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001564 /* OK done, the stream lives its own life now */
Willy Tarreaufa1d3572019-01-31 10:31:51 +01001565 if (h2_frt_has_too_many_cs(h2c))
Willy Tarreauf2101912018-07-19 10:11:38 +02001566 h2c->flags |= H2_CF_DEM_TOOMANY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001567 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001568 return h2s;
1569
1570 out_free_cs:
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001571 h2c->nb_cs--;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001572 cs_free(cs);
Olivier Houchard58d87f32019-05-29 16:44:17 +02001573 h2s->cs = NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001574 out_close:
Willy Tarreau71049cc2018-03-28 13:56:39 +02001575 h2s_destroy(h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001576 out:
Willy Tarreau45efc072018-10-03 18:27:52 +02001577 sess_log(sess);
Willy Tarreau7838a792019-08-12 18:42:03 +02001578 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreau45efc072018-10-03 18:27:52 +02001579 return NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001580}
1581
Willy Tarreau751f2d02018-10-05 09:35:00 +02001582/* allocates a new stream associated to conn_stream <cs> on the h2c connection
1583 * and returns it, or NULL in case of memory allocation error or if the highest
1584 * possible stream ID was reached.
1585 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01001586static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001587{
1588 struct h2s *h2s = NULL;
1589
Willy Tarreau7838a792019-08-12 18:42:03 +02001590 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1591
Willy Tarreau86949782019-01-31 10:42:05 +01001592 if (h2c->nb_streams >= h2c->streams_limit)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001593 goto out;
1594
Willy Tarreaua80dca82019-01-24 17:08:28 +01001595 if (h2_streams_left(h2c) < 1)
1596 goto out;
1597
Willy Tarreau751f2d02018-10-05 09:35:00 +02001598 /* Defer choosing the ID until we send the first message to create the stream */
1599 h2s = h2s_new(h2c, 0);
1600 if (!h2s)
1601 goto out;
1602
1603 h2s->cs = cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001604 h2s->sess = sess;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001605 cs->ctx = h2s;
1606 h2c->nb_cs++;
1607
Willy Tarreau751f2d02018-10-05 09:35:00 +02001608 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001609 if (likely(h2s))
1610 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
1611 else
1612 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn, h2s);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001613 return h2s;
1614}
1615
Willy Tarreaube5b7152017-09-25 16:25:39 +02001616/* try to send a settings frame on the connection. Returns > 0 on success, 0 if
1617 * it couldn't do anything. It may return an error in h2c. See RFC7540#11.3 for
1618 * the various settings codes.
1619 */
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001620static int h2c_send_settings(struct h2c *h2c)
Willy Tarreaube5b7152017-09-25 16:25:39 +02001621{
1622 struct buffer *res;
1623 char buf_data[100]; // enough for 15 settings
Willy Tarreau83061a82018-07-13 11:56:34 +02001624 struct buffer buf;
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001625 int mfs;
Willy Tarreau7838a792019-08-12 18:42:03 +02001626 int ret = 0;
1627
1628 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001629
1630 if (h2c_mux_busy(h2c, NULL)) {
1631 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001632 goto out;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001633 }
1634
Willy Tarreaube5b7152017-09-25 16:25:39 +02001635 chunk_init(&buf, buf_data, sizeof(buf_data));
1636 chunk_memcpy(&buf,
1637 "\x00\x00\x00" /* length : 0 for now */
1638 "\x04\x00" /* type : 4 (settings), flags : 0 */
1639 "\x00\x00\x00\x00", /* stream ID : 0 */
1640 9);
1641
Willy Tarreau0bbad6b2019-02-26 16:01:52 +01001642 if (h2c->flags & H2_CF_IS_BACK) {
1643 /* send settings_enable_push=0 */
1644 chunk_memcat(&buf, "\x00\x02\x00\x00\x00\x00", 6);
1645 }
1646
Amaury Denoyelle0ea2c4f2021-07-09 17:14:30 +02001647 /* rfc 8441 #3 SETTINGS_ENABLE_CONNECT_PROTOCOL=1,
1648 * sent automatically unless disabled in the global config */
1649 if (!(global.tune.options & GTUNE_DISABLE_H2_WEBSOCKET))
1650 chunk_memcat(&buf, "\x00\x08\x00\x00\x00\x01", 6);
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01001651
Willy Tarreaube5b7152017-09-25 16:25:39 +02001652 if (h2_settings_header_table_size != 4096) {
1653 char str[6] = "\x00\x01"; /* header_table_size */
1654
1655 write_n32(str + 2, h2_settings_header_table_size);
1656 chunk_memcat(&buf, str, 6);
1657 }
1658
1659 if (h2_settings_initial_window_size != 65535) {
1660 char str[6] = "\x00\x04"; /* initial_window_size */
1661
1662 write_n32(str + 2, h2_settings_initial_window_size);
1663 chunk_memcat(&buf, str, 6);
1664 }
1665
1666 if (h2_settings_max_concurrent_streams != 0) {
1667 char str[6] = "\x00\x03"; /* max_concurrent_streams */
1668
1669 /* Note: 0 means "unlimited" for haproxy's config but not for
1670 * the protocol, so never send this value!
1671 */
1672 write_n32(str + 2, h2_settings_max_concurrent_streams);
1673 chunk_memcat(&buf, str, 6);
1674 }
1675
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001676 mfs = h2_settings_max_frame_size;
1677 if (mfs > global.tune.bufsize)
1678 mfs = global.tune.bufsize;
1679
1680 if (!mfs)
1681 mfs = global.tune.bufsize;
1682
1683 if (mfs != 16384) {
Willy Tarreaube5b7152017-09-25 16:25:39 +02001684 char str[6] = "\x00\x05"; /* max_frame_size */
1685
1686 /* note: similarly we could also emit MAX_HEADER_LIST_SIZE to
1687 * match bufsize - rewrite size, but at the moment it seems
1688 * that clients don't take care of it.
1689 */
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001690 write_n32(str + 2, mfs);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001691 chunk_memcat(&buf, str, 6);
1692 }
1693
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001694 h2_set_frame_size(buf.area, buf.data - 9);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001695
1696 res = br_tail(h2c->mbuf);
1697 retry:
1698 if (!h2_get_buf(h2c, res)) {
1699 h2c->flags |= H2_CF_MUX_MALLOC;
1700 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001701 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001702 }
1703
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001704 ret = b_istput(res, ist2(buf.area, buf.data));
Willy Tarreaube5b7152017-09-25 16:25:39 +02001705 if (unlikely(ret <= 0)) {
1706 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001707 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1708 goto retry;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001709 h2c->flags |= H2_CF_MUX_MFULL;
1710 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001711 }
1712 else {
1713 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001714 ret = 0;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001715 }
1716 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001717 out:
1718 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001719 return ret;
1720}
1721
Willy Tarreau52eed752017-09-22 15:05:09 +02001722/* Try to receive a connection preface, then upon success try to send our
1723 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1724 * missing data. It may return an error in h2c.
1725 */
1726static int h2c_frt_recv_preface(struct h2c *h2c)
1727{
1728 int ret1;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001729 int ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001730
Willy Tarreau7838a792019-08-12 18:42:03 +02001731 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
1732
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001733 ret1 = b_isteq(&h2c->dbuf, 0, b_data(&h2c->dbuf), ist(H2_CONN_PREFACE));
Willy Tarreau52eed752017-09-22 15:05:09 +02001734
1735 if (unlikely(ret1 <= 0)) {
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02001736 if (!ret1)
1737 h2c->flags |= H2_CF_DEM_SHORT_READ;
Amaury Denoyellea8879232020-10-27 17:16:03 +01001738 if (ret1 < 0 || conn_xprt_read0_pending(h2c->conn)) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01001739 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 +02001740 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc23d6d12021-06-17 08:08:48 +02001741 if (b_data(&h2c->dbuf) ||
1742 !(((const struct session *)h2c->conn->owner)->fe->options & PR_O_IGNORE_PRB))
1743 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Amaury Denoyellea8879232020-10-27 17:16:03 +01001744 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001745 ret2 = 0;
1746 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02001747 }
1748
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001749 ret2 = h2c_send_settings(h2c);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001750 if (ret2 > 0)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001751 b_del(&h2c->dbuf, ret1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001752 out:
1753 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001754 return ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001755}
1756
Willy Tarreau01b44822018-10-03 14:26:37 +02001757/* Try to send a connection preface, then upon success try to send our
1758 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1759 * missing data. It may return an error in h2c.
1760 */
1761static int h2c_bck_send_preface(struct h2c *h2c)
1762{
1763 struct buffer *res;
Willy Tarreau7838a792019-08-12 18:42:03 +02001764 int ret = 0;
1765
1766 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02001767
1768 if (h2c_mux_busy(h2c, NULL)) {
1769 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001770 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001771 }
1772
Willy Tarreaubcc45952019-05-26 10:05:50 +02001773 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001774 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001775 if (!h2_get_buf(h2c, res)) {
Willy Tarreau01b44822018-10-03 14:26:37 +02001776 h2c->flags |= H2_CF_MUX_MALLOC;
1777 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001778 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001779 }
1780
1781 if (!b_data(res)) {
1782 /* preface not yet sent */
Willy Tarreau9c218e72019-05-26 10:08:28 +02001783 ret = b_istput(res, ist(H2_CONN_PREFACE));
1784 if (unlikely(ret <= 0)) {
1785 if (!ret) {
1786 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1787 goto retry;
1788 h2c->flags |= H2_CF_MUX_MFULL;
1789 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001790 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001791 }
1792 else {
1793 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001794 ret = 0;
1795 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001796 }
1797 }
Willy Tarreau01b44822018-10-03 14:26:37 +02001798 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001799 ret = h2c_send_settings(h2c);
1800 out:
1801 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
1802 return ret;
Willy Tarreau01b44822018-10-03 14:26:37 +02001803}
1804
Willy Tarreau081d4722017-05-16 21:51:05 +02001805/* try to send a GOAWAY frame on the connection to report an error or a graceful
1806 * shutdown, with h2c->errcode as the error code. Returns > 0 on success or zero
1807 * if nothing was done. It uses h2c->last_sid as the advertised ID, or copies it
1808 * from h2c->max_id if it's not set yet (<0). In case of lack of room to write
1809 * the message, it subscribes the requester (either <h2s> or <h2c>) to future
1810 * notifications. It sets H2_CF_GOAWAY_SENT on success, and H2_CF_GOAWAY_FAILED
1811 * on unrecoverable failure. It will not attempt to send one again in this last
1812 * case so that it is safe to use h2c_error() to report such errors.
1813 */
1814static int h2c_send_goaway_error(struct h2c *h2c, struct h2s *h2s)
1815{
1816 struct buffer *res;
1817 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02001818 int ret = 0;
Willy Tarreau081d4722017-05-16 21:51:05 +02001819
Willy Tarreau7838a792019-08-12 18:42:03 +02001820 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
1821
1822 if (h2c->flags & H2_CF_GOAWAY_FAILED) {
1823 ret = 1; // claim that it worked
1824 goto out;
1825 }
Willy Tarreau081d4722017-05-16 21:51:05 +02001826
1827 if (h2c_mux_busy(h2c, h2s)) {
1828 if (h2s)
1829 h2s->flags |= H2_SF_BLK_MBUSY;
1830 else
1831 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001832 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001833 }
1834
Willy Tarreau9c218e72019-05-26 10:08:28 +02001835 /* len: 8, type: 7, flags: none, sid: 0 */
1836 memcpy(str, "\x00\x00\x08\x07\x00\x00\x00\x00\x00", 9);
1837
1838 if (h2c->last_sid < 0)
1839 h2c->last_sid = h2c->max_id;
1840
1841 write_n32(str + 9, h2c->last_sid);
1842 write_n32(str + 13, h2c->errcode);
1843
Willy Tarreaubcc45952019-05-26 10:05:50 +02001844 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001845 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001846 if (!h2_get_buf(h2c, res)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02001847 h2c->flags |= H2_CF_MUX_MALLOC;
1848 if (h2s)
1849 h2s->flags |= H2_SF_BLK_MROOM;
1850 else
1851 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001852 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001853 }
1854
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001855 ret = b_istput(res, ist2(str, 17));
Willy Tarreau081d4722017-05-16 21:51:05 +02001856 if (unlikely(ret <= 0)) {
1857 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001858 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1859 goto retry;
Willy Tarreau081d4722017-05-16 21:51:05 +02001860 h2c->flags |= H2_CF_MUX_MFULL;
1861 if (h2s)
1862 h2s->flags |= H2_SF_BLK_MROOM;
1863 else
1864 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001865 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001866 }
1867 else {
1868 /* we cannot report this error using GOAWAY, so we mark
1869 * it and claim a success.
1870 */
1871 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1872 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau7838a792019-08-12 18:42:03 +02001873 ret = 1;
1874 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001875 }
1876 }
1877 h2c->flags |= H2_CF_GOAWAY_SENT;
Willy Tarreauf965b2a2020-12-01 10:47:18 +01001878
1879 /* some codes are not for real errors, just attempts to close cleanly */
1880 switch (h2c->errcode) {
1881 case H2_ERR_NO_ERROR:
1882 case H2_ERR_ENHANCE_YOUR_CALM:
1883 case H2_ERR_REFUSED_STREAM:
1884 case H2_ERR_CANCEL:
1885 break;
1886 default:
Willy Tarreau4781b152021-04-06 13:53:36 +02001887 HA_ATOMIC_INC(&h2c->px_counters->goaway_resp);
Willy Tarreauf965b2a2020-12-01 10:47:18 +01001888 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001889 out:
1890 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
Willy Tarreau081d4722017-05-16 21:51:05 +02001891 return ret;
1892}
1893
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001894/* Try to send an RST_STREAM frame on the connection for the indicated stream
1895 * during mux operations. This stream must be valid and cannot be closed
1896 * already. h2s->id will be used for the stream ID and h2s->errcode will be
1897 * used for the error code. h2s->st will be update to H2_SS_CLOSED if it was
1898 * not yet.
1899 *
1900 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1901 * to write the message, it subscribes the stream to future notifications.
1902 */
1903static int h2s_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1904{
1905 struct buffer *res;
1906 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001907 int ret = 0;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001908
Willy Tarreau7838a792019-08-12 18:42:03 +02001909 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
1910
1911 if (!h2s || h2s->st == H2_SS_CLOSED) {
1912 ret = 1;
1913 goto out;
1914 }
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001915
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001916 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1917 * RST_STREAM in response to a RST_STREAM frame.
1918 */
Willy Tarreau231f6162019-08-06 10:01:40 +02001919 if (h2c->dsi == h2s->id && h2c->dft == H2_FT_RST_STREAM) {
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001920 ret = 1;
1921 goto ignore;
1922 }
1923
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001924 if (h2c_mux_busy(h2c, h2s)) {
1925 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001926 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001927 }
1928
Willy Tarreau9c218e72019-05-26 10:08:28 +02001929 /* len: 4, type: 3, flags: none */
1930 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1931 write_n32(str + 5, h2s->id);
1932 write_n32(str + 9, h2s->errcode);
1933
Willy Tarreaubcc45952019-05-26 10:05:50 +02001934 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001935 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001936 if (!h2_get_buf(h2c, res)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001937 h2c->flags |= H2_CF_MUX_MALLOC;
1938 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001939 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001940 }
1941
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001942 ret = b_istput(res, ist2(str, 13));
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001943 if (unlikely(ret <= 0)) {
1944 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001945 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1946 goto retry;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001947 h2c->flags |= H2_CF_MUX_MFULL;
1948 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001949 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001950 }
1951 else {
1952 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001953 ret = 0;
1954 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001955 }
1956 }
1957
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001958 ignore:
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001959 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001960 h2s_close(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001961 out:
1962 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001963 return ret;
1964}
1965
1966/* Try to send an RST_STREAM frame on the connection for the stream being
1967 * demuxed using h2c->dsi for the stream ID. It will use h2s->errcode as the
Willy Tarreaue6888ff2018-12-23 18:26:26 +01001968 * error code, even if the stream is one of the dummy ones, and will update
1969 * h2s->st to H2_SS_CLOSED if it was not yet.
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001970 *
1971 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1972 * to write the message, it blocks the demuxer and subscribes it to future
Joseph Herlantd77575d2018-11-25 10:54:45 -08001973 * notifications. It's worth mentioning that an RST may even be sent for a
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001974 * closed stream.
Willy Tarreau27a84c92017-10-17 08:10:17 +02001975 */
1976static int h2c_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1977{
1978 struct buffer *res;
1979 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001980 int ret = 0;
1981
1982 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02001983
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001984 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1985 * RST_STREAM in response to a RST_STREAM frame.
1986 */
1987 if (h2c->dft == H2_FT_RST_STREAM) {
1988 ret = 1;
1989 goto ignore;
1990 }
1991
Willy Tarreau27a84c92017-10-17 08:10:17 +02001992 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001993 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001994 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001995 }
1996
Willy Tarreau9c218e72019-05-26 10:08:28 +02001997 /* len: 4, type: 3, flags: none */
1998 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1999
2000 write_n32(str + 5, h2c->dsi);
2001 write_n32(str + 9, h2s->errcode);
2002
Willy Tarreaubcc45952019-05-26 10:05:50 +02002003 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002004 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002005 if (!h2_get_buf(h2c, res)) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02002006 h2c->flags |= H2_CF_MUX_MALLOC;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002007 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002008 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002009 }
2010
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002011 ret = b_istput(res, ist2(str, 13));
Willy Tarreau27a84c92017-10-17 08:10:17 +02002012 if (unlikely(ret <= 0)) {
2013 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002014 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2015 goto retry;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002016 h2c->flags |= H2_CF_MUX_MFULL;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002017 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002018 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002019 }
2020 else {
2021 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002022 ret = 0;
2023 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002024 }
2025 }
2026
Willy Tarreau8adae7c2018-03-22 17:37:05 +01002027 ignore:
Willy Tarreauab0e1da2018-10-05 10:16:37 +02002028 if (h2s->id) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02002029 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01002030 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002031 }
2032
Willy Tarreau7838a792019-08-12 18:42:03 +02002033 out:
Willy Tarreau4781b152021-04-06 13:53:36 +02002034 HA_ATOMIC_INC(&h2c->px_counters->rst_stream_resp);
Willy Tarreau7838a792019-08-12 18:42:03 +02002035 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02002036 return ret;
2037}
2038
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002039/* try to send an empty DATA frame with the ES flag set to notify about the
2040 * end of stream and match a shutdown(write). If an ES was already sent as
2041 * indicated by HLOC/ERROR/RESET/CLOSED states, nothing is done. Returns > 0
2042 * on success or zero if nothing was done. In case of lack of room to write the
2043 * message, it subscribes the requesting stream to future notifications.
2044 */
2045static int h2_send_empty_data_es(struct h2s *h2s)
2046{
2047 struct h2c *h2c = h2s->h2c;
2048 struct buffer *res;
2049 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002050 int ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002051
Willy Tarreau7838a792019-08-12 18:42:03 +02002052 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
2053
2054 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED) {
2055 ret = 1;
2056 goto out;
2057 }
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002058
2059 if (h2c_mux_busy(h2c, h2s)) {
2060 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002061 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002062 }
2063
Willy Tarreau9c218e72019-05-26 10:08:28 +02002064 /* len: 0x000000, type: 0(DATA), flags: ES=1 */
2065 memcpy(str, "\x00\x00\x00\x00\x01", 5);
2066 write_n32(str + 5, h2s->id);
2067
Willy Tarreaubcc45952019-05-26 10:05:50 +02002068 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002069 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002070 if (!h2_get_buf(h2c, res)) {
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002071 h2c->flags |= H2_CF_MUX_MALLOC;
2072 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002073 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002074 }
2075
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002076 ret = b_istput(res, ist2(str, 9));
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002077 if (likely(ret > 0)) {
2078 h2s->flags |= H2_SF_ES_SENT;
2079 }
2080 else if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002081 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2082 goto retry;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002083 h2c->flags |= H2_CF_MUX_MFULL;
2084 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002085 }
2086 else {
2087 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002088 ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002089 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002090 out:
2091 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002092 return ret;
2093}
2094
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05002095/* wake a specific stream and assign its conn_stream some CS_FL_* flags among
Willy Tarreau99ad1b32019-05-14 11:46:28 +02002096 * CS_FL_ERR_PENDING and CS_FL_ERROR if needed. The stream's state
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002097 * is automatically updated accordingly. If the stream is orphaned, it is
2098 * destroyed.
Christopher Fauletf02ca002019-03-07 16:21:34 +01002099 */
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002100static void h2s_wake_one_stream(struct h2s *h2s)
Christopher Fauletf02ca002019-03-07 16:21:34 +01002101{
Willy Tarreau7838a792019-08-12 18:42:03 +02002102 struct h2c *h2c = h2s->h2c;
2103
2104 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn, h2s);
2105
Christopher Fauletf02ca002019-03-07 16:21:34 +01002106 if (!h2s->cs) {
2107 /* this stream was already orphaned */
2108 h2s_destroy(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002109 TRACE_DEVEL("leaving with no h2s", H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002110 return;
2111 }
2112
Christopher Fauletaade4ed2020-10-08 15:38:41 +02002113 if (h2c_read0_pending(h2s->h2c)) {
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002114 if (h2s->st == H2_SS_OPEN)
2115 h2s->st = H2_SS_HREM;
2116 else if (h2s->st == H2_SS_HLOC)
2117 h2s_close(h2s);
2118 }
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002119
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002120 if ((h2s->h2c->st0 >= H2_CS_ERROR || h2s->h2c->conn->flags & CO_FL_ERROR) ||
2121 (h2s->h2c->last_sid > 0 && (!h2s->id || h2s->id > h2s->h2c->last_sid))) {
2122 h2s->cs->flags |= CS_FL_ERR_PENDING;
2123 if (h2s->cs->flags & CS_FL_EOS)
2124 h2s->cs->flags |= CS_FL_ERROR;
Willy Tarreau23482912019-05-07 15:23:14 +02002125
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002126 if (h2s->st < H2_SS_ERROR)
2127 h2s->st = H2_SS_ERROR;
2128 }
Christopher Fauletf02ca002019-03-07 16:21:34 +01002129
2130 h2s_alert(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002131 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002132}
2133
2134/* wake the streams attached to the connection, whose id is greater than <last>
2135 * or unassigned.
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002136 */
Willy Tarreau23482912019-05-07 15:23:14 +02002137static void h2_wake_some_streams(struct h2c *h2c, int last)
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002138{
2139 struct eb32_node *node;
2140 struct h2s *h2s;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002141
Willy Tarreau7838a792019-08-12 18:42:03 +02002142 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn);
2143
Christopher Fauletf02ca002019-03-07 16:21:34 +01002144 /* Wake all streams with ID > last */
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002145 node = eb32_lookup_ge(&h2c->streams_by_id, last + 1);
2146 while (node) {
2147 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002148 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002149 h2s_wake_one_stream(h2s);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002150 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01002151
Christopher Fauletf02ca002019-03-07 16:21:34 +01002152 /* Wake all streams with unassigned ID (ID == 0) */
2153 node = eb32_lookup(&h2c->streams_by_id, 0);
2154 while (node) {
2155 h2s = container_of(node, struct h2s, by_id);
2156 if (h2s->id > 0)
2157 break;
2158 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002159 h2s_wake_one_stream(h2s);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002160 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002161
2162 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002163}
2164
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002165/* Wake up all blocked streams whose window size has become positive after the
2166 * mux's initial window was adjusted. This should be done after having processed
2167 * SETTINGS frames which have updated the mux's initial window size.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002168 */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002169static void h2c_unblock_sfctl(struct h2c *h2c)
Willy Tarreau3421aba2017-07-27 15:41:03 +02002170{
2171 struct h2s *h2s;
2172 struct eb32_node *node;
2173
Willy Tarreau7838a792019-08-12 18:42:03 +02002174 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
2175
Willy Tarreau3421aba2017-07-27 15:41:03 +02002176 node = eb32_first(&h2c->streams_by_id);
2177 while (node) {
2178 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002179 if (h2s->flags & H2_SF_BLK_SFCTL && h2s_mws(h2s) > 0) {
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002180 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002181 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002182 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2183 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreau2b718102021-04-21 07:32:39 +02002184 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002185 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002186 node = eb32_next(node);
2187 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002188
2189 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002190}
2191
2192/* processes a SETTINGS frame whose payload is <payload> for <plen> bytes, and
2193 * ACKs it if needed. Returns > 0 on success or zero on missing data. It may
Willy Tarreaub860c732019-01-30 15:39:55 +01002194 * return an error in h2c. The caller must have already verified frame length
2195 * and stream ID validity. Described in RFC7540#6.5.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002196 */
2197static int h2c_handle_settings(struct h2c *h2c)
2198{
2199 unsigned int offset;
2200 int error;
2201
Willy Tarreau7838a792019-08-12 18:42:03 +02002202 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
2203
Willy Tarreau3421aba2017-07-27 15:41:03 +02002204 if (h2c->dff & H2_F_SETTINGS_ACK) {
2205 if (h2c->dfl) {
2206 error = H2_ERR_FRAME_SIZE_ERROR;
2207 goto fail;
2208 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002209 goto done;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002210 }
2211
Willy Tarreau3421aba2017-07-27 15:41:03 +02002212 /* process full frame only */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002213 if (b_data(&h2c->dbuf) < h2c->dfl) {
2214 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002215 goto out0;
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002216 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002217
2218 /* parse the frame */
2219 for (offset = 0; offset < h2c->dfl; offset += 6) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002220 uint16_t type = h2_get_n16(&h2c->dbuf, offset);
2221 int32_t arg = h2_get_n32(&h2c->dbuf, offset + 2);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002222
2223 switch (type) {
2224 case H2_SETTINGS_INITIAL_WINDOW_SIZE:
2225 /* we need to update all existing streams with the
2226 * difference from the previous iws.
2227 */
2228 if (arg < 0) { // RFC7540#6.5.2
2229 error = H2_ERR_FLOW_CONTROL_ERROR;
2230 goto fail;
2231 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002232 h2c->miw = arg;
2233 break;
2234 case H2_SETTINGS_MAX_FRAME_SIZE:
2235 if (arg < 16384 || arg > 16777215) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002236 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 +02002237 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002238 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002239 goto fail;
2240 }
2241 h2c->mfs = arg;
2242 break;
Willy Tarreau8a4dca02022-01-13 16:00:12 +01002243 case H2_SETTINGS_HEADER_TABLE_SIZE:
2244 h2c->flags |= H2_CF_SHTS_UPDATED;
2245 break;
Willy Tarreau1b38b462017-12-03 19:02:28 +01002246 case H2_SETTINGS_ENABLE_PUSH:
2247 if (arg < 0 || arg > 1) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002248 TRACE_ERROR("ENABLE_PUSH out of range", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002249 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002250 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002251 goto fail;
2252 }
2253 break;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01002254 case H2_SETTINGS_MAX_CONCURRENT_STREAMS:
2255 if (h2c->flags & H2_CF_IS_BACK) {
2256 /* the limit is only for the backend; for the frontend it is our limit */
2257 if ((unsigned int)arg > h2_settings_max_concurrent_streams)
2258 arg = h2_settings_max_concurrent_streams;
2259 h2c->streams_limit = arg;
2260 }
2261 break;
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01002262 case H2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
Amaury Denoyelle68993a12021-10-18 09:43:29 +02002263 if (arg == 1)
2264 h2c->flags |= H2_CF_RCVD_RFC8441;
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01002265 break;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002266 }
2267 }
2268
2269 /* need to ACK this frame now */
2270 h2c->st0 = H2_CS_FRAME_A;
Willy Tarreau7838a792019-08-12 18:42:03 +02002271 done:
2272 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002273 return 1;
2274 fail:
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002275 if (!(h2c->flags & H2_CF_IS_BACK))
2276 sess_log(h2c->conn->owner);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002277 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002278 out0:
2279 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 +02002280 return 0;
2281}
2282
2283/* try to send an ACK for a settings frame on the connection. Returns > 0 on
2284 * success or one of the h2_status values.
2285 */
2286static int h2c_ack_settings(struct h2c *h2c)
2287{
2288 struct buffer *res;
2289 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002290 int ret = 0;
2291
2292 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002293
2294 if (h2c_mux_busy(h2c, NULL)) {
2295 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002296 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002297 }
2298
Willy Tarreau9c218e72019-05-26 10:08:28 +02002299 memcpy(str,
2300 "\x00\x00\x00" /* length : 0 (no data) */
2301 "\x04" "\x01" /* type : 4, flags : ACK */
2302 "\x00\x00\x00\x00" /* stream ID */, 9);
2303
Willy Tarreaubcc45952019-05-26 10:05:50 +02002304 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002305 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002306 if (!h2_get_buf(h2c, res)) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02002307 h2c->flags |= H2_CF_MUX_MALLOC;
2308 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002309 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002310 }
2311
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002312 ret = b_istput(res, ist2(str, 9));
Willy Tarreau3421aba2017-07-27 15:41:03 +02002313 if (unlikely(ret <= 0)) {
2314 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002315 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2316 goto retry;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002317 h2c->flags |= H2_CF_MUX_MFULL;
2318 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002319 }
2320 else {
2321 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002322 ret = 0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002323 }
2324 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002325 out:
2326 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002327 return ret;
2328}
2329
Willy Tarreaucf68c782017-10-10 17:11:41 +02002330/* processes a PING frame and schedules an ACK if needed. The caller must pass
2331 * the pointer to the payload in <payload>. Returns > 0 on success or zero on
Willy Tarreaub860c732019-01-30 15:39:55 +01002332 * missing data. The caller must have already verified frame length
2333 * and stream ID validity.
Willy Tarreaucf68c782017-10-10 17:11:41 +02002334 */
2335static int h2c_handle_ping(struct h2c *h2c)
2336{
Willy Tarreaucf68c782017-10-10 17:11:41 +02002337 /* schedule a response */
Willy Tarreau68ed6412017-12-03 18:15:56 +01002338 if (!(h2c->dff & H2_F_PING_ACK))
Willy Tarreaucf68c782017-10-10 17:11:41 +02002339 h2c->st0 = H2_CS_FRAME_A;
2340 return 1;
2341}
2342
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002343/* Try to send a window update for stream id <sid> and value <increment>.
2344 * Returns > 0 on success or zero on missing room or failure. It may return an
2345 * error in h2c.
2346 */
2347static int h2c_send_window_update(struct h2c *h2c, int sid, uint32_t increment)
2348{
2349 struct buffer *res;
2350 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002351 int ret = 0;
2352
2353 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002354
2355 if (h2c_mux_busy(h2c, NULL)) {
2356 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002357 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002358 }
2359
Willy Tarreau9c218e72019-05-26 10:08:28 +02002360 /* length: 4, type: 8, flags: none */
2361 memcpy(str, "\x00\x00\x04\x08\x00", 5);
2362 write_n32(str + 5, sid);
2363 write_n32(str + 9, increment);
2364
Willy Tarreaubcc45952019-05-26 10:05:50 +02002365 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002366 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002367 if (!h2_get_buf(h2c, res)) {
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002368 h2c->flags |= H2_CF_MUX_MALLOC;
2369 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002370 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002371 }
2372
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002373 ret = b_istput(res, ist2(str, 13));
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002374 if (unlikely(ret <= 0)) {
2375 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002376 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2377 goto retry;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002378 h2c->flags |= H2_CF_MUX_MFULL;
2379 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002380 }
2381 else {
2382 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002383 ret = 0;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002384 }
2385 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002386 out:
2387 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002388 return ret;
2389}
2390
2391/* try to send pending window update for the connection. It's safe to call it
2392 * with no pending updates. Returns > 0 on success or zero on missing room or
2393 * failure. It may return an error in h2c.
2394 */
2395static int h2c_send_conn_wu(struct h2c *h2c)
2396{
2397 int ret = 1;
2398
Willy Tarreau7838a792019-08-12 18:42:03 +02002399 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2400
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002401 if (h2c->rcvd_c <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002402 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002403
Willy Tarreau97aaa672018-12-23 09:49:04 +01002404 if (!(h2c->flags & H2_CF_WINDOW_OPENED)) {
2405 /* increase the advertised connection window to 2G on
2406 * first update.
2407 */
2408 h2c->flags |= H2_CF_WINDOW_OPENED;
2409 h2c->rcvd_c += H2_INITIAL_WINDOW_INCREMENT;
2410 }
2411
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002412 /* send WU for the connection */
2413 ret = h2c_send_window_update(h2c, 0, h2c->rcvd_c);
2414 if (ret > 0)
2415 h2c->rcvd_c = 0;
2416
Willy Tarreau7838a792019-08-12 18:42:03 +02002417 out:
2418 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002419 return ret;
2420}
2421
2422/* try to send pending window update for the current dmux stream. It's safe to
2423 * call it with no pending updates. Returns > 0 on success or zero on missing
2424 * room or failure. It may return an error in h2c.
2425 */
2426static int h2c_send_strm_wu(struct h2c *h2c)
2427{
2428 int ret = 1;
2429
Willy Tarreau7838a792019-08-12 18:42:03 +02002430 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2431
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002432 if (h2c->rcvd_s <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002433 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002434
2435 /* send WU for the stream */
2436 ret = h2c_send_window_update(h2c, h2c->dsi, h2c->rcvd_s);
2437 if (ret > 0)
2438 h2c->rcvd_s = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002439 out:
2440 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002441 return ret;
2442}
2443
Willy Tarreaucf68c782017-10-10 17:11:41 +02002444/* try to send an ACK for a ping frame on the connection. Returns > 0 on
2445 * success, 0 on missing data or one of the h2_status values.
2446 */
2447static int h2c_ack_ping(struct h2c *h2c)
2448{
2449 struct buffer *res;
2450 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02002451 int ret = 0;
2452
2453 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002454
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002455 if (b_data(&h2c->dbuf) < 8)
Willy Tarreau7838a792019-08-12 18:42:03 +02002456 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002457
2458 if (h2c_mux_busy(h2c, NULL)) {
2459 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002460 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002461 }
2462
Willy Tarreaucf68c782017-10-10 17:11:41 +02002463 memcpy(str,
2464 "\x00\x00\x08" /* length : 8 (same payload) */
2465 "\x06" "\x01" /* type : 6, flags : ACK */
2466 "\x00\x00\x00\x00" /* stream ID */, 9);
2467
2468 /* copy the original payload */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002469 h2_get_buf_bytes(str + 9, 8, &h2c->dbuf, 0);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002470
Willy Tarreau9c218e72019-05-26 10:08:28 +02002471 res = br_tail(h2c->mbuf);
2472 retry:
2473 if (!h2_get_buf(h2c, res)) {
2474 h2c->flags |= H2_CF_MUX_MALLOC;
2475 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002476 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02002477 }
2478
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002479 ret = b_istput(res, ist2(str, 17));
Willy Tarreaucf68c782017-10-10 17:11:41 +02002480 if (unlikely(ret <= 0)) {
2481 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002482 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2483 goto retry;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002484 h2c->flags |= H2_CF_MUX_MFULL;
2485 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002486 }
2487 else {
2488 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002489 ret = 0;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002490 }
2491 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002492 out:
2493 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002494 return ret;
2495}
2496
Willy Tarreau26f95952017-07-27 17:18:30 +02002497/* processes a WINDOW_UPDATE frame whose payload is <payload> for <plen> bytes.
2498 * Returns > 0 on success or zero on missing data. It may return an error in
Willy Tarreaub860c732019-01-30 15:39:55 +01002499 * h2c or h2s. The caller must have already verified frame length and stream ID
2500 * validity. Described in RFC7540#6.9.
Willy Tarreau26f95952017-07-27 17:18:30 +02002501 */
2502static int h2c_handle_window_update(struct h2c *h2c, struct h2s *h2s)
2503{
2504 int32_t inc;
2505 int error;
2506
Willy Tarreau7838a792019-08-12 18:42:03 +02002507 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
2508
Willy Tarreau26f95952017-07-27 17:18:30 +02002509 /* process full frame only */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002510 if (b_data(&h2c->dbuf) < h2c->dfl) {
2511 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002512 goto out0;
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002513 }
Willy Tarreau26f95952017-07-27 17:18:30 +02002514
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002515 inc = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau26f95952017-07-27 17:18:30 +02002516
2517 if (h2c->dsi != 0) {
2518 /* stream window update */
Willy Tarreau26f95952017-07-27 17:18:30 +02002519
2520 /* it's not an error to receive WU on a closed stream */
2521 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau7838a792019-08-12 18:42:03 +02002522 goto done;
Willy Tarreau26f95952017-07-27 17:18:30 +02002523
2524 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002525 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 +02002526 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002527 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002528 goto strm_err;
2529 }
2530
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002531 if (h2s_mws(h2s) >= 0 && h2s_mws(h2s) + inc < 0) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002532 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 +02002533 error = H2_ERR_FLOW_CONTROL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002534 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002535 goto strm_err;
2536 }
2537
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002538 h2s->sws += inc;
2539 if (h2s_mws(h2s) > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002540 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002541 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002542 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2543 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreau2b718102021-04-21 07:32:39 +02002544 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreau26f95952017-07-27 17:18:30 +02002545 }
2546 }
2547 else {
2548 /* connection window update */
2549 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002550 TRACE_ERROR("conn WINDOW_UPDATE inc=0", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002551 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002552 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002553 goto conn_err;
2554 }
2555
2556 if (h2c->mws >= 0 && h2c->mws + inc < 0) {
2557 error = H2_ERR_FLOW_CONTROL_ERROR;
2558 goto conn_err;
2559 }
2560
2561 h2c->mws += inc;
2562 }
2563
Willy Tarreau7838a792019-08-12 18:42:03 +02002564 done:
2565 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002566 return 1;
2567
2568 conn_err:
2569 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002570 out0:
2571 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 +02002572 return 0;
2573
2574 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002575 h2s_error(h2s, error);
2576 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002577 TRACE_DEVEL("leaving on stream error", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002578 return 0;
2579}
2580
Willy Tarreaue96b0922017-10-30 00:28:29 +01002581/* processes a GOAWAY frame, and signals all streams whose ID is greater than
Willy Tarreaub860c732019-01-30 15:39:55 +01002582 * the last ID. Returns > 0 on success or zero on missing data. The caller must
2583 * have already verified frame length and stream ID validity. Described in
2584 * RFC7540#6.8.
Willy Tarreaue96b0922017-10-30 00:28:29 +01002585 */
2586static int h2c_handle_goaway(struct h2c *h2c)
2587{
Willy Tarreaue96b0922017-10-30 00:28:29 +01002588 int last;
2589
Willy Tarreau7838a792019-08-12 18:42:03 +02002590 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002591 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002592 if (b_data(&h2c->dbuf) < h2c->dfl) {
2593 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002594 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002595 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002596 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01002597
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002598 last = h2_get_n32(&h2c->dbuf, 0);
2599 h2c->errcode = h2_get_n32(&h2c->dbuf, 4);
Willy Tarreau11cc2d62017-12-03 10:27:47 +01002600 if (h2c->last_sid < 0)
2601 h2c->last_sid = last;
Willy Tarreau23482912019-05-07 15:23:14 +02002602 h2_wake_some_streams(h2c, last);
Willy Tarreau7838a792019-08-12 18:42:03 +02002603 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002604 return 1;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002605}
2606
Willy Tarreau92153fc2017-12-03 19:46:19 +01002607/* processes a PRIORITY frame, and either skips it or rejects if it is
Willy Tarreaub860c732019-01-30 15:39:55 +01002608 * invalid. Returns > 0 on success or zero on missing data. It may return an
2609 * error in h2c. The caller must have already verified frame length and stream
2610 * ID validity. Described in RFC7540#6.3.
Willy Tarreau92153fc2017-12-03 19:46:19 +01002611 */
2612static int h2c_handle_priority(struct h2c *h2c)
2613{
Willy Tarreau7838a792019-08-12 18:42:03 +02002614 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
2615
Willy Tarreau92153fc2017-12-03 19:46:19 +01002616 /* process full frame only */
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002617 if (b_data(&h2c->dbuf) < h2c->dfl) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002618 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002619 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002620 return 0;
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002621 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01002622
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002623 if (h2_get_n32(&h2c->dbuf, 0) == h2c->dsi) {
Willy Tarreau92153fc2017-12-03 19:46:19 +01002624 /* 7540#5.3 : can't depend on itself */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002625 TRACE_ERROR("PRIORITY depends on itself", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002626 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02002627 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002628 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002629 return 0;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002630 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002631 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002632 return 1;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002633}
2634
Willy Tarreaucd234e92017-08-18 10:59:39 +02002635/* processes an RST_STREAM frame, and sets the 32-bit error code on the stream.
Willy Tarreaub860c732019-01-30 15:39:55 +01002636 * Returns > 0 on success or zero on missing data. The caller must have already
2637 * verified frame length and stream ID validity. Described in RFC7540#6.4.
Willy Tarreaucd234e92017-08-18 10:59:39 +02002638 */
2639static int h2c_handle_rst_stream(struct h2c *h2c, struct h2s *h2s)
2640{
Willy Tarreau7838a792019-08-12 18:42:03 +02002641 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
2642
Willy Tarreaucd234e92017-08-18 10:59:39 +02002643 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002644 if (b_data(&h2c->dbuf) < h2c->dfl) {
2645 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 +02002646 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002647 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002648 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002649
2650 /* late RST, already handled */
Willy Tarreau7838a792019-08-12 18:42:03 +02002651 if (h2s->st == H2_SS_CLOSED) {
2652 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 +02002653 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002654 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002655
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002656 h2s->errcode = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau00dd0782018-03-01 16:31:34 +01002657 h2s_close(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002658
2659 if (h2s->cs) {
Willy Tarreauec988c72018-12-19 18:00:29 +01002660 cs_set_error(h2s->cs);
Willy Tarreauf830f012018-12-19 17:44:55 +01002661 h2s_alert(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002662 }
2663
2664 h2s->flags |= H2_SF_RST_RCVD;
Willy Tarreau7838a792019-08-12 18:42:03 +02002665 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002666 return 1;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002667}
2668
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002669/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2670 * It may return an error in h2c or h2s. The caller must consider that the
2671 * return value is the new h2s in case one was allocated (most common case).
2672 * Described in RFC7540#6.2. Most of the
Willy Tarreau13278b42017-10-13 19:23:14 +02002673 * errors here are reported as connection errors since it's impossible to
2674 * recover from such errors after the compression context has been altered.
2675 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002676static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau13278b42017-10-13 19:23:14 +02002677{
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002678 struct buffer rxbuf = BUF_NULL;
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002679 unsigned long long body_len = 0;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002680 uint32_t flags = 0;
Willy Tarreau13278b42017-10-13 19:23:14 +02002681 int error;
2682
Willy Tarreau7838a792019-08-12 18:42:03 +02002683 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2684
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002685 if (!b_size(&h2c->dbuf)) {
2686 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002687 goto out; // empty buffer
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002688 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002689
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002690 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2691 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002692 goto out; // incomplete frame
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002693 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002694
2695 /* now either the frame is complete or the buffer is complete */
2696 if (h2s->st != H2_SS_IDLE) {
Willy Tarreau88d138e2019-01-02 19:38:14 +01002697 /* The stream exists/existed, this must be a trailers frame */
2698 if (h2s->st != H2_SS_CLOSED) {
Amaury Denoyelle74162742020-12-11 17:53:05 +01002699 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &body_len, NULL);
Willy Tarreauaab1a602019-05-06 11:12:18 +02002700 /* unrecoverable error ? */
2701 if (h2c->st0 >= H2_CS_ERROR)
2702 goto out;
2703
Christopher Faulet0de3f552021-10-08 08:56:00 +02002704 if (error == 0) {
2705 /* Demux not blocked because of the stream, it is an incomplete frame */
2706 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2707 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002708 goto out; // missing data
Christopher Faulet0de3f552021-10-08 08:56:00 +02002709 }
Willy Tarreauaab1a602019-05-06 11:12:18 +02002710
2711 if (error < 0) {
2712 /* Failed to decode this frame (e.g. too large request)
2713 * but the HPACK decompressor is still synchronized.
2714 */
2715 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
2716 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau88d138e2019-01-02 19:38:14 +01002717 goto out;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002718 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01002719 goto done;
2720 }
Willy Tarreau1f035502019-01-30 11:44:07 +01002721 /* the connection was already killed by an RST, let's consume
2722 * the data and send another RST.
2723 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01002724 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Willy Tarreau1f035502019-01-30 11:44:07 +01002725 h2s = (struct h2s*)h2_error_stream;
2726 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002727 }
2728 else if (h2c->dsi <= h2c->max_id || !(h2c->dsi & 1)) {
2729 /* RFC7540#5.1.1 stream id > prev ones, and must be odd here */
2730 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002731 TRACE_ERROR("HEADERS on invalid stream ID", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau4781b152021-04-06 13:53:36 +02002732 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau22de8d32018-09-05 19:55:58 +02002733 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02002734 goto conn_err;
2735 }
Willy Tarreau415b1ee2019-01-02 13:59:43 +01002736 else if (h2c->flags & H2_CF_DEM_TOOMANY)
2737 goto out; // IDLE but too many cs still present
Willy Tarreau13278b42017-10-13 19:23:14 +02002738
Amaury Denoyelle74162742020-12-11 17:53:05 +01002739 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002740
Willy Tarreau25919232019-01-03 14:48:18 +01002741 /* unrecoverable error ? */
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002742 if (h2c->st0 >= H2_CS_ERROR)
2743 goto out;
2744
Willy Tarreau25919232019-01-03 14:48:18 +01002745 if (error <= 0) {
Christopher Faulet0de3f552021-10-08 08:56:00 +02002746 if (error == 0) {
2747 /* Demux not blocked because of the stream, it is an incomplete frame */
2748 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2749 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau25919232019-01-03 14:48:18 +01002750 goto out; // missing data
Christopher Faulet0de3f552021-10-08 08:56:00 +02002751 }
Willy Tarreau25919232019-01-03 14:48:18 +01002752
2753 /* Failed to decode this stream (e.g. too large request)
2754 * but the HPACK decompressor is still synchronized.
2755 */
2756 h2s = (struct h2s*)h2_error_stream;
2757 goto send_rst;
2758 }
2759
Willy Tarreau3c10d512021-06-17 08:29:14 +02002760 TRACE_USER("rcvd H2 request ", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW, h2c->conn, 0, &rxbuf);
2761
Willy Tarreau22de8d32018-09-05 19:55:58 +02002762 /* Note: we don't emit any other logs below because ff we return
Willy Tarreaua8e49542018-10-03 18:53:55 +02002763 * positively from h2c_frt_stream_new(), the stream will report the error,
2764 * and if we return in error, h2c_frt_stream_new() will emit the error.
Christopher Faulet7d013e72020-12-15 16:56:50 +01002765 *
2766 * Xfer the rxbuf to the stream. On success, the new stream owns the
2767 * rxbuf. On error, it is released here.
Willy Tarreau22de8d32018-09-05 19:55:58 +02002768 */
Amaury Denoyelleee7fcd52021-10-18 14:45:49 +02002769 h2s = h2c_frt_stream_new(h2c, h2c->dsi, &rxbuf, flags);
Willy Tarreau13278b42017-10-13 19:23:14 +02002770 if (!h2s) {
Willy Tarreau96a10c22018-12-23 18:30:44 +01002771 h2s = (struct h2s*)h2_refused_stream;
2772 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002773 }
2774
2775 h2s->st = H2_SS_OPEN;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002776 h2s->flags |= flags;
Willy Tarreau1915ca22019-01-24 11:49:37 +01002777 h2s->body_len = body_len;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002778
Willy Tarreau88d138e2019-01-02 19:38:14 +01002779 done:
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002780 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau13278b42017-10-13 19:23:14 +02002781 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002782
2783 if (h2s->flags & H2_SF_ES_RCVD) {
Willy Tarreaufc10f592019-01-30 19:28:32 +01002784 if (h2s->st == H2_SS_OPEN)
2785 h2s->st = H2_SS_HREM;
2786 else
2787 h2s_close(h2s);
Willy Tarreau13278b42017-10-13 19:23:14 +02002788 }
2789
Willy Tarreau3a429f02019-01-03 11:41:50 +01002790 /* update the max stream ID if the request is being processed */
2791 if (h2s->id > h2c->max_id)
2792 h2c->max_id = h2s->id;
Willy Tarreau13278b42017-10-13 19:23:14 +02002793
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002794 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002795
2796 conn_err:
2797 h2c_error(h2c, error);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002798 goto out;
Willy Tarreau13278b42017-10-13 19:23:14 +02002799
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002800 out:
2801 h2_release_buf(h2c, &rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002802 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 +01002803 return NULL;
Willy Tarreau96a10c22018-12-23 18:30:44 +01002804
2805 send_rst:
2806 /* make the demux send an RST for the current stream. We may only
2807 * do this if we're certain that the HEADERS frame was properly
2808 * decompressed so that the HPACK decoder is still kept up to date.
2809 */
2810 h2_release_buf(h2c, &rxbuf);
2811 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002812
Willy Tarreau022e5e52020-09-10 09:33:15 +02002813 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 +02002814 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau96a10c22018-12-23 18:30:44 +01002815 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002816}
2817
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002818/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2819 * It may return an error in h2c or h2s. Described in RFC7540#6.2. Most of the
2820 * errors here are reported as connection errors since it's impossible to
2821 * recover from such errors after the compression context has been altered.
2822 */
2823static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
2824{
Christopher Faulet6884aa32019-09-23 15:28:20 +02002825 struct buffer rxbuf = BUF_NULL;
2826 unsigned long long body_len = 0;
2827 uint32_t flags = 0;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002828 int error;
2829
Willy Tarreau7838a792019-08-12 18:42:03 +02002830 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2831
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002832 if (!b_size(&h2c->dbuf)) {
2833 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002834 goto fail; // empty buffer
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002835 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002836
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002837 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2838 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002839 goto fail; // incomplete frame
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002840 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002841
Christopher Faulet6884aa32019-09-23 15:28:20 +02002842 if (h2s->st != H2_SS_CLOSED) {
Amaury Denoyelle74162742020-12-11 17:53:05 +01002843 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &h2s->body_len, h2s->upgrade_protocol);
Christopher Faulet6884aa32019-09-23 15:28:20 +02002844 }
2845 else {
2846 /* the connection was already killed by an RST, let's consume
2847 * the data and send another RST.
2848 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01002849 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Christopher Fauletea7a7782019-09-26 16:19:13 +02002850 h2s = (struct h2s*)h2_error_stream;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002851 h2c->st0 = H2_CS_FRAME_E;
2852 goto send_rst;
2853 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002854
Willy Tarreau25919232019-01-03 14:48:18 +01002855 /* unrecoverable error ? */
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002856 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002857 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002858
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002859 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2860 /* RFC7540#5.1 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002861 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 +01002862 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2863 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau4781b152021-04-06 13:53:36 +02002864 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002865 goto fail;
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002866 }
2867
Willy Tarreau25919232019-01-03 14:48:18 +01002868 if (error <= 0) {
Christopher Faulet0de3f552021-10-08 08:56:00 +02002869 if (error == 0) {
2870 /* Demux not blocked because of the stream, it is an incomplete frame */
2871 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2872 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002873 goto fail; // missing data
Christopher Faulet0de3f552021-10-08 08:56:00 +02002874 }
Willy Tarreau25919232019-01-03 14:48:18 +01002875
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002876 /* stream error : send RST_STREAM */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002877 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 +01002878 h2s_error(h2s, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002879 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau4781b152021-04-06 13:53:36 +02002880 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002881 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002882 }
2883
Christopher Fauletfa922f02019-05-07 10:55:17 +02002884 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002885 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002886
Willy Tarreau927b88b2019-03-04 08:03:25 +01002887 if (h2s->cs && h2s->cs->flags & CS_FL_ERROR && h2s->st < H2_SS_ERROR)
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002888 h2s->st = H2_SS_ERROR;
Christopher Fauletfa922f02019-05-07 10:55:17 +02002889 else if (h2s->flags & H2_SF_ES_RCVD) {
2890 if (h2s->st == H2_SS_OPEN)
2891 h2s->st = H2_SS_HREM;
2892 else if (h2s->st == H2_SS_HLOC)
2893 h2s_close(h2s);
2894 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002895
Christopher Fauletf95f8762021-01-22 11:59:07 +01002896 /* Unblock busy server h2s waiting for the response headers to validate
2897 * the tunnel establishment or the end of the response of an oborted
2898 * tunnel
2899 */
2900 if ((h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY)) == (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY) ||
2901 (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)) {
2902 TRACE_STATE("Unblock h2s blocked on tunnel establishment/abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2903 h2s->flags &= ~H2_SF_BLK_MBUSY;
2904 }
2905
Willy Tarreaucbd37e02021-06-16 18:32:42 +02002906 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 +02002907 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002908 return h2s;
Willy Tarreau7838a792019-08-12 18:42:03 +02002909 fail:
2910 TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2911 return NULL;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002912
2913 send_rst:
2914 /* make the demux send an RST for the current stream. We may only
2915 * do this if we're certain that the HEADERS frame was properly
2916 * decompressed so that the HPACK decoder is still kept up to date.
2917 */
2918 h2_release_buf(h2c, &rxbuf);
2919 h2c->st0 = H2_CS_FRAME_E;
2920
Willy Tarreau022e5e52020-09-10 09:33:15 +02002921 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 +02002922 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2923 return h2s;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002924}
2925
Willy Tarreau454f9052017-10-26 19:40:35 +02002926/* processes a DATA frame. Returns > 0 on success or zero on missing data.
2927 * It may return an error in h2c or h2s. Described in RFC7540#6.1.
2928 */
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01002929static int h2c_handle_data(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02002930{
2931 int error;
2932
Willy Tarreau7838a792019-08-12 18:42:03 +02002933 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2934
Willy Tarreau454f9052017-10-26 19:40:35 +02002935 /* note that empty DATA frames are perfectly valid and sometimes used
2936 * to signal an end of stream (with the ES flag).
2937 */
2938
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002939 if (!b_size(&h2c->dbuf) && h2c->dfl) {
2940 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002941 goto fail; // empty buffer
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002942 }
Willy Tarreau454f9052017-10-26 19:40:35 +02002943
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002944 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2945 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002946 goto fail; // incomplete frame
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002947 }
Willy Tarreau454f9052017-10-26 19:40:35 +02002948
2949 /* now either the frame is complete or the buffer is complete */
2950
Willy Tarreau454f9052017-10-26 19:40:35 +02002951 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2952 /* RFC7540#6.1 */
2953 error = H2_ERR_STREAM_CLOSED;
2954 goto strm_err;
2955 }
2956
Christopher Faulet4f09ec82019-06-19 09:25:58 +02002957 if ((h2s->flags & H2_SF_DATA_CLEN) && (h2c->dfl - h2c->dpl) > h2s->body_len) {
Willy Tarreau1915ca22019-01-24 11:49:37 +01002958 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002959 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 +01002960 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002961 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau1915ca22019-01-24 11:49:37 +01002962 goto strm_err;
2963 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01002964 if (!(h2c->flags & H2_CF_IS_BACK) &&
2965 (h2s->flags & (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT)) == (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT) &&
2966 ((h2c->dfl - h2c->dpl) || !(h2c->dff & H2_F_DATA_END_STREAM))) {
2967 /* a tunnel attempt was aborted but the client still try to send some raw data.
2968 * Thus the stream is closed with the CANCEL error. Here we take care it is not
2969 * an empty DATA Frame with the ES flag. The error is only handled if ES was
2970 * already sent to the client because depending on the scheduling, these data may
Ilya Shipitsinacf84592021-02-06 22:29:08 +05002971 * have been sent before the server response but not handle here.
Christopher Faulet91b21dc2021-01-22 12:13:15 +01002972 */
2973 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2974 error = H2_ERR_CANCEL;
2975 goto strm_err;
2976 }
Willy Tarreau1915ca22019-01-24 11:49:37 +01002977
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002978 if (!h2_frt_transfer_data(h2s))
Willy Tarreau7838a792019-08-12 18:42:03 +02002979 goto fail;
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002980
Willy Tarreau454f9052017-10-26 19:40:35 +02002981 /* call the upper layers to process the frame, then let the upper layer
2982 * notify the stream about any change.
2983 */
2984 if (!h2s->cs) {
Willy Tarreau082c4572019-08-06 10:11:02 +02002985 /* The upper layer has already closed, this may happen on
2986 * 4xx/redirects during POST, or when receiving a response
2987 * from an H2 server after the client has aborted.
2988 */
2989 error = H2_ERR_CANCEL;
Willy Tarreau454f9052017-10-26 19:40:35 +02002990 goto strm_err;
2991 }
2992
Willy Tarreau8f650c32017-11-21 19:36:21 +01002993 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002994 goto fail;
Willy Tarreau8f650c32017-11-21 19:36:21 +01002995
Willy Tarreau721c9742017-11-07 11:05:42 +01002996 if (h2s->st >= H2_SS_ERROR) {
Willy Tarreau454f9052017-10-26 19:40:35 +02002997 /* stream error : send RST_STREAM */
Willy Tarreaua20a5192017-12-27 11:02:06 +01002998 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02002999 }
3000
3001 /* check for completion : the callee will change this to FRAME_A or
3002 * FRAME_H once done.
3003 */
3004 if (h2c->st0 == H2_CS_FRAME_P)
Willy Tarreau7838a792019-08-12 18:42:03 +02003005 goto fail;
Willy Tarreau454f9052017-10-26 19:40:35 +02003006
Willy Tarreauc4134ba2017-12-11 18:45:08 +01003007 /* last frame */
3008 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02003009 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreaufc10f592019-01-30 19:28:32 +01003010 if (h2s->st == H2_SS_OPEN)
3011 h2s->st = H2_SS_HREM;
3012 else
3013 h2s_close(h2s);
3014
Willy Tarreau1915ca22019-01-24 11:49:37 +01003015 if (h2s->flags & H2_SF_DATA_CLEN && h2s->body_len) {
3016 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003017 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 +01003018 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02003019 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau1915ca22019-01-24 11:49:37 +01003020 goto strm_err;
3021 }
Willy Tarreauc4134ba2017-12-11 18:45:08 +01003022 }
3023
Christopher Fauletf95f8762021-01-22 11:59:07 +01003024 /* Unblock busy server h2s waiting for the end of the response for an
3025 * aborted tunnel
3026 */
3027 if ((h2c->flags & H2_CF_IS_BACK) &&
3028 (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)) {
3029 TRACE_STATE("Unblock h2s blocked on tunnel abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
3030 h2s->flags &= ~H2_SF_BLK_MBUSY;
3031 }
3032
Willy Tarreau7838a792019-08-12 18:42:03 +02003033 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02003034 return 1;
3035
Willy Tarreau454f9052017-10-26 19:40:35 +02003036 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01003037 h2s_error(h2s, error);
3038 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003039 fail:
3040 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 +02003041 return 0;
3042}
3043
Willy Tarreau63864812019-08-07 14:25:20 +02003044/* check that the current frame described in h2c->{dsi,dft,dfl,dff,...} is
3045 * valid for the current stream state. This is needed only after parsing the
3046 * frame header but in practice it can be performed at any time during
3047 * H2_CS_FRAME_P since no state transition happens there. Returns >0 on success
3048 * or 0 in case of error, in which case either h2s or h2c will carry an error.
3049 */
3050static int h2_frame_check_vs_state(struct h2c *h2c, struct h2s *h2s)
3051{
Willy Tarreau7838a792019-08-12 18:42:03 +02003052 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
3053
Willy Tarreau63864812019-08-07 14:25:20 +02003054 if (h2s->st == H2_SS_IDLE &&
3055 h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) {
3056 /* RFC7540#5.1: any frame other than HEADERS or PRIORITY in
3057 * this state MUST be treated as a connection error
3058 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003059 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 +02003060 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003061 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau63864812019-08-07 14:25:20 +02003062 /* only log if no other stream can report the error */
3063 sess_log(h2c->conn->owner);
3064 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003065 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02003066 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 +02003067 return 0;
3068 }
3069
Willy Tarreau57a18162019-11-24 14:57:53 +01003070 if (h2s->st == H2_SS_IDLE && (h2c->flags & H2_CF_IS_BACK)) {
3071 /* only PUSH_PROMISE would be permitted here */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003072 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 +01003073 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02003074 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau57a18162019-11-24 14:57:53 +01003075 TRACE_DEVEL("leaving in error (idle&back)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s);
3076 return 0;
3077 }
3078
Willy Tarreau63864812019-08-07 14:25:20 +02003079 if (h2s->st == H2_SS_HREM && h2c->dft != H2_FT_WINDOW_UPDATE &&
3080 h2c->dft != H2_FT_RST_STREAM && h2c->dft != H2_FT_PRIORITY) {
3081 /* RFC7540#5.1: any frame other than WU/PRIO/RST in
3082 * this state MUST be treated as a stream error.
3083 * 6.2, 6.6 and 6.10 further mandate that HEADERS/
3084 * PUSH_PROMISE/CONTINUATION cause connection errors.
3085 */
Amaury Denoyellea8879232020-10-27 17:16:03 +01003086 if (h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003087 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 +02003088 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02003089 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Amaury Denoyellea8879232020-10-27 17:16:03 +01003090 }
3091 else {
Willy Tarreau63864812019-08-07 14:25:20 +02003092 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
Amaury Denoyellea8879232020-10-27 17:16:03 +01003093 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003094 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 +02003095 return 0;
3096 }
3097
3098 /* Below the management of frames received in closed state is a
3099 * bit hackish because the spec makes strong differences between
3100 * streams closed by receiving RST, sending RST, and seeing ES
3101 * in both directions. In addition to this, the creation of a
3102 * new stream reusing the identifier of a closed one will be
3103 * detected here. Given that we cannot keep track of all closed
3104 * streams forever, we consider that unknown closed streams were
3105 * closed on RST received, which allows us to respond with an
3106 * RST without breaking the connection (eg: to abort a transfer).
3107 * Some frames have to be silently ignored as well.
3108 */
3109 if (h2s->st == H2_SS_CLOSED && h2c->dsi) {
3110 if (!(h2c->flags & H2_CF_IS_BACK) && h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
3111 /* #5.1.1: The identifier of a newly
3112 * established stream MUST be numerically
3113 * greater than all streams that the initiating
3114 * endpoint has opened or reserved. This
3115 * governs streams that are opened using a
3116 * HEADERS frame and streams that are reserved
3117 * using PUSH_PROMISE. An endpoint that
3118 * receives an unexpected stream identifier
3119 * MUST respond with a connection error.
3120 */
3121 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003122 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 +02003123 return 0;
3124 }
3125
Willy Tarreau4c08f122019-09-26 08:47:15 +02003126 if (h2s->flags & H2_SF_RST_RCVD &&
3127 !(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 +02003128 /* RFC7540#5.1:closed: an endpoint that
3129 * receives any frame other than PRIORITY after
3130 * receiving a RST_STREAM MUST treat that as a
3131 * stream error of type STREAM_CLOSED.
3132 *
3133 * Note that old streams fall into this category
3134 * and will lead to an RST being sent.
3135 *
3136 * However, we cannot generalize this to all frame types. Those
3137 * carrying compression state must still be processed before
3138 * being dropped or we'll desynchronize the decoder. This can
3139 * happen with request trailers received after sending an
3140 * RST_STREAM, or with header/trailers responses received after
3141 * sending RST_STREAM (aborted stream).
Willy Tarreau4c08f122019-09-26 08:47:15 +02003142 *
3143 * In addition, since our CLOSED streams always carry the
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003144 * RST_RCVD bit, we don't want to accidentally catch valid
Willy Tarreau4c08f122019-09-26 08:47:15 +02003145 * frames for a closed stream, i.e. RST/PRIO/WU.
Willy Tarreau63864812019-08-07 14:25:20 +02003146 */
3147 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
3148 h2c->st0 = H2_CS_FRAME_E;
Christopher Faulet6884aa32019-09-23 15:28:20 +02003149 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 +02003150 return 0;
3151 }
3152
3153 /* RFC7540#5.1:closed: if this state is reached as a
3154 * result of sending a RST_STREAM frame, the peer that
3155 * receives the RST_STREAM might have already sent
3156 * frames on the stream that cannot be withdrawn. An
3157 * endpoint MUST ignore frames that it receives on
3158 * closed streams after it has sent a RST_STREAM
3159 * frame. An endpoint MAY choose to limit the period
3160 * over which it ignores frames and treat frames that
3161 * arrive after this time as being in error.
3162 */
3163 if (h2s->id && !(h2s->flags & H2_SF_RST_SENT)) {
3164 /* RFC7540#5.1:closed: any frame other than
3165 * PRIO/WU/RST in this state MUST be treated as
3166 * a connection error
3167 */
3168 if (h2c->dft != H2_FT_RST_STREAM &&
3169 h2c->dft != H2_FT_PRIORITY &&
3170 h2c->dft != H2_FT_WINDOW_UPDATE) {
3171 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003172 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 +02003173 return 0;
3174 }
3175 }
3176 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003177 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02003178 return 1;
3179}
3180
Willy Tarreaubc933932017-10-09 16:21:43 +02003181/* process Rx frames to be demultiplexed */
3182static void h2_process_demux(struct h2c *h2c)
3183{
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003184 struct h2s *h2s = NULL, *tmp_h2s;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003185 struct h2_fh hdr;
3186 unsigned int padlen = 0;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003187 int32_t old_iw = h2c->miw;
Willy Tarreauf3ee0692017-10-17 08:18:25 +02003188
Willy Tarreau7838a792019-08-12 18:42:03 +02003189 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3190
Willy Tarreau081d4722017-05-16 21:51:05 +02003191 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02003192 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02003193
3194 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3195 if (h2c->st0 == H2_CS_PREFACE) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003196 TRACE_STATE("expecting preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02003197 if (h2c->flags & H2_CF_IS_BACK)
Willy Tarreau7838a792019-08-12 18:42:03 +02003198 goto out;
3199
Willy Tarreau52eed752017-09-22 15:05:09 +02003200 if (unlikely(h2c_frt_recv_preface(h2c) <= 0)) {
3201 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02003202 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003203 TRACE_PROTO("failed to receive preface", H2_EV_RX_PREFACE|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003204 h2c->st0 = H2_CS_ERROR2;
Willy Tarreauc23d6d12021-06-17 08:08:48 +02003205 if (b_data(&h2c->dbuf) ||
Christopher Faulet79b347d2021-07-26 10:18:35 +02003206 !(((const struct session *)h2c->conn->owner)->fe->options & (PR_O_NULLNOLOG|PR_O_IGNORE_PRB)))
Willy Tarreauc23d6d12021-06-17 08:08:48 +02003207 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02003208 }
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003209 goto done;
Willy Tarreau52eed752017-09-22 15:05:09 +02003210 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003211 TRACE_PROTO("received preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003212
3213 h2c->max_id = 0;
3214 h2c->st0 = H2_CS_SETTINGS1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003215 TRACE_STATE("switching to SETTINGS1", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003216 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003217
3218 if (h2c->st0 == H2_CS_SETTINGS1) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003219 /* ensure that what is pending is a valid SETTINGS frame
3220 * without an ACK.
3221 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003222 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 +02003223 if (!h2_get_frame_hdr(&h2c->dbuf, &hdr)) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003224 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003225 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau22de8d32018-09-05 19:55:58 +02003226 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003227 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 +02003228 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003229 if (!(h2c->flags & H2_CF_IS_BACK))
3230 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02003231 }
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003232 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003233 }
3234
3235 if (hdr.sid || hdr.ft != H2_FT_SETTINGS || hdr.ff & H2_F_SETTINGS_ACK) {
3236 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003237 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 +02003238 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
3239 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003240 if (!(h2c->flags & H2_CF_IS_BACK))
3241 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003242 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003243 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003244 }
3245
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003246 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003247 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003248 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 +02003249 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
3250 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003251 if (!(h2c->flags & H2_CF_IS_BACK))
3252 sess_log(h2c->conn->owner);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003253 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003254 }
3255
Willy Tarreau3bf69182018-12-21 15:34:50 +01003256 /* that's OK, switch to FRAME_P to process it. This is
3257 * a SETTINGS frame whose header has already been
3258 * deleted above.
3259 */
Willy Tarreau54f46e52019-01-30 15:11:03 +01003260 padlen = 0;
Willy Tarreau4781b152021-04-06 13:53:36 +02003261 HA_ATOMIC_INC(&h2c->px_counters->settings_rcvd);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003262 goto new_frame;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003263 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003264 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003265
3266 /* process as many incoming frames as possible below */
Willy Tarreau7838a792019-08-12 18:42:03 +02003267 while (1) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02003268 int ret = 0;
3269
Willy Tarreau7838a792019-08-12 18:42:03 +02003270 if (!b_data(&h2c->dbuf)) {
3271 TRACE_DEVEL("no more Rx data", H2_EV_RX_FRAME, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003272 h2c->flags |= H2_CF_DEM_SHORT_READ;
3273 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003274 }
3275
3276 if (h2c->st0 >= H2_CS_ERROR) {
3277 TRACE_STATE("end of connection reported", H2_EV_RX_FRAME|H2_EV_RX_EOI, h2c->conn);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003278 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003279 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003280
3281 if (h2c->st0 == H2_CS_FRAME_H) {
Willy Tarreau30d05f32019-08-06 15:49:51 +02003282 h2c->rcvd_s = 0;
3283
Willy Tarreau7838a792019-08-12 18:42:03 +02003284 TRACE_STATE("expecting H2 frame header", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003285 if (!h2_peek_frame_hdr(&h2c->dbuf, 0, &hdr)) {
3286 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003287 break;
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003288 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003289
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003290 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003291 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 +02003292 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003293 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02003294 /* only log if no other stream can report the error */
3295 sess_log(h2c->conn->owner);
3296 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003297 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003298 break;
3299 }
3300
Christopher Fauletdd2a5622019-06-18 12:22:38 +02003301 padlen = 0;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003302 if (h2_ft_bit(hdr.ft) & H2_FT_PADDED_MASK && hdr.ff & H2_F_PADDED) {
3303 /* If the frame is padded (HEADERS, PUSH_PROMISE or DATA),
3304 * we read the pad length and drop it from the remaining
3305 * payload (one byte + the 9 remaining ones = 10 total
3306 * removed), so we have a frame payload starting after the
3307 * pad len. Flow controlled frames (DATA) also count the
3308 * padlen in the flow control, so it must be adjusted.
3309 */
3310 if (hdr.len < 1) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003311 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 +01003312 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003313 if (!(h2c->flags & H2_CF_IS_BACK))
3314 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003315 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003316 goto done;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003317 }
3318 hdr.len--;
3319
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003320 if (b_data(&h2c->dbuf) < 10) {
3321 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003322 break; // missing padlen
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003323 }
Willy Tarreau3bf69182018-12-21 15:34:50 +01003324
3325 padlen = *(uint8_t *)b_peek(&h2c->dbuf, 9);
3326
3327 if (padlen > hdr.len) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003328 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 +01003329 /* RFC7540#6.1 : pad length = length of
3330 * frame payload or greater => error.
3331 */
3332 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003333 if (!(h2c->flags & H2_CF_IS_BACK))
3334 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003335 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003336 goto done;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003337 }
3338
3339 if (h2_ft_bit(hdr.ft) & H2_FT_FC_MASK) {
3340 h2c->rcvd_c++;
3341 h2c->rcvd_s++;
3342 }
3343 b_del(&h2c->dbuf, 1);
3344 }
3345 h2_skip_frame_hdr(&h2c->dbuf);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003346
3347 new_frame:
Willy Tarreau7e98c052017-10-10 15:56:59 +02003348 h2c->dfl = hdr.len;
3349 h2c->dsi = hdr.sid;
3350 h2c->dft = hdr.ft;
3351 h2c->dff = hdr.ff;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003352 h2c->dpl = padlen;
Willy Tarreau73db4342019-09-25 07:28:44 +02003353 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 +02003354 h2c->st0 = H2_CS_FRAME_P;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003355
3356 /* check for minimum basic frame format validity */
3357 ret = h2_frame_check(h2c->dft, 1, h2c->dsi, h2c->dfl, global.tune.bufsize);
3358 if (ret != H2_ERR_NO_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003359 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 +01003360 h2c_error(h2c, ret);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003361 if (!(h2c->flags & H2_CF_IS_BACK))
3362 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003363 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003364 goto done;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003365 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003366 }
3367
Willy Tarreau9fd5aa82019-08-06 15:21:45 +02003368 /* Only H2_CS_FRAME_P, H2_CS_FRAME_A and H2_CS_FRAME_E here.
3369 * H2_CS_FRAME_P indicates an incomplete previous operation
3370 * (most often the first attempt) and requires some validity
3371 * checks for the frame and the current state. The two other
3372 * ones are set after completion (or abortion) and must skip
3373 * validity checks.
3374 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003375 tmp_h2s = h2c_st_by_id(h2c, h2c->dsi);
3376
Willy Tarreau567beb82018-12-18 16:52:44 +01003377 if (tmp_h2s != h2s && h2s && h2s->cs &&
3378 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003379 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003380 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003381 (h2s->flags & H2_SF_ES_RCVD) ||
3382 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003383 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003384 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 +01003385 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003386 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003387 }
3388 h2s = tmp_h2s;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003389
Willy Tarreau63864812019-08-07 14:25:20 +02003390 if (h2c->st0 == H2_CS_FRAME_E ||
Willy Tarreau7838a792019-08-12 18:42:03 +02003391 (h2c->st0 == H2_CS_FRAME_P && !h2_frame_check_vs_state(h2c, h2s))) {
3392 TRACE_PROTO("stream error reported", H2_EV_RX_FRAME|H2_EV_PROTO_ERR, h2c->conn, h2s);
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003393 goto strm_err;
Willy Tarreau7838a792019-08-12 18:42:03 +02003394 }
Willy Tarreauc0da1962017-10-30 18:38:00 +01003395
Willy Tarreau7e98c052017-10-10 15:56:59 +02003396 switch (h2c->dft) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02003397 case H2_FT_SETTINGS:
Willy Tarreau7838a792019-08-12 18:42:03 +02003398 if (h2c->st0 == H2_CS_FRAME_P) {
3399 TRACE_PROTO("receiving H2 SETTINGS frame", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn, h2s);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003400 ret = h2c_handle_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003401 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003402 HA_ATOMIC_INC(&h2c->px_counters->settings_rcvd);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003403
Willy Tarreau7838a792019-08-12 18:42:03 +02003404 if (h2c->st0 == H2_CS_FRAME_A) {
3405 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 +02003406 ret = h2c_ack_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003407 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003408 break;
3409
Willy Tarreaucf68c782017-10-10 17:11:41 +02003410 case H2_FT_PING:
Willy Tarreau7838a792019-08-12 18:42:03 +02003411 if (h2c->st0 == H2_CS_FRAME_P) {
3412 TRACE_PROTO("receiving H2 PING frame", H2_EV_RX_FRAME|H2_EV_RX_PING, h2c->conn, h2s);
Willy Tarreaucf68c782017-10-10 17:11:41 +02003413 ret = h2c_handle_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003414 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003415
Willy Tarreau7838a792019-08-12 18:42:03 +02003416 if (h2c->st0 == H2_CS_FRAME_A) {
3417 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 +02003418 ret = h2c_ack_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003419 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003420 break;
3421
Willy Tarreau26f95952017-07-27 17:18:30 +02003422 case H2_FT_WINDOW_UPDATE:
Willy Tarreau7838a792019-08-12 18:42:03 +02003423 if (h2c->st0 == H2_CS_FRAME_P) {
3424 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 +02003425 ret = h2c_handle_window_update(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003426 }
Willy Tarreau26f95952017-07-27 17:18:30 +02003427 break;
3428
Willy Tarreau61290ec2017-10-17 08:19:21 +02003429 case H2_FT_CONTINUATION:
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003430 /* RFC7540#6.10: CONTINUATION may only be preceded by
Willy Tarreauea18f862018-12-22 20:19:26 +01003431 * a HEADERS/PUSH_PROMISE/CONTINUATION frame. These
3432 * frames' parsers consume all following CONTINUATION
3433 * frames so this one is out of sequence.
Willy Tarreau61290ec2017-10-17 08:19:21 +02003434 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003435 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 +01003436 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003437 if (!(h2c->flags & H2_CF_IS_BACK))
3438 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003439 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003440 goto done;
Willy Tarreau61290ec2017-10-17 08:19:21 +02003441
Willy Tarreau13278b42017-10-13 19:23:14 +02003442 case H2_FT_HEADERS:
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003443 if (h2c->st0 == H2_CS_FRAME_P) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003444 TRACE_PROTO("receiving H2 HEADERS frame", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02003445 if (h2c->flags & H2_CF_IS_BACK)
3446 tmp_h2s = h2c_bck_handle_headers(h2c, h2s);
3447 else
3448 tmp_h2s = h2c_frt_handle_headers(h2c, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003449 if (tmp_h2s) {
3450 h2s = tmp_h2s;
3451 ret = 1;
3452 }
3453 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003454 HA_ATOMIC_INC(&h2c->px_counters->headers_rcvd);
Willy Tarreau13278b42017-10-13 19:23:14 +02003455 break;
3456
Willy Tarreau454f9052017-10-26 19:40:35 +02003457 case H2_FT_DATA:
Willy Tarreau7838a792019-08-12 18:42:03 +02003458 if (h2c->st0 == H2_CS_FRAME_P) {
3459 TRACE_PROTO("receiving H2 DATA frame", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01003460 ret = h2c_handle_data(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003461 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003462 HA_ATOMIC_INC(&h2c->px_counters->data_rcvd);
Willy Tarreau454f9052017-10-26 19:40:35 +02003463
Willy Tarreau7838a792019-08-12 18:42:03 +02003464 if (h2c->st0 == H2_CS_FRAME_A) {
3465 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 +02003466 ret = h2c_send_strm_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003467 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003468 break;
Willy Tarreaucd234e92017-08-18 10:59:39 +02003469
Willy Tarreau92153fc2017-12-03 19:46:19 +01003470 case H2_FT_PRIORITY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003471 if (h2c->st0 == H2_CS_FRAME_P) {
3472 TRACE_PROTO("receiving H2 PRIORITY frame", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn, h2s);
Willy Tarreau92153fc2017-12-03 19:46:19 +01003473 ret = h2c_handle_priority(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003474 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01003475 break;
3476
Willy Tarreaucd234e92017-08-18 10:59:39 +02003477 case H2_FT_RST_STREAM:
Willy Tarreau7838a792019-08-12 18:42:03 +02003478 if (h2c->st0 == H2_CS_FRAME_P) {
3479 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 +02003480 ret = h2c_handle_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003481 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003482 HA_ATOMIC_INC(&h2c->px_counters->rst_stream_rcvd);
Willy Tarreaucd234e92017-08-18 10:59:39 +02003483 break;
3484
Willy Tarreaue96b0922017-10-30 00:28:29 +01003485 case H2_FT_GOAWAY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003486 if (h2c->st0 == H2_CS_FRAME_P) {
3487 TRACE_PROTO("receiving H2 GOAWAY frame", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn, h2s);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003488 ret = h2c_handle_goaway(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003489 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003490 HA_ATOMIC_INC(&h2c->px_counters->goaway_rcvd);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003491 break;
3492
Willy Tarreau1c661982017-10-30 13:52:01 +01003493 /* implement all extra frame types here */
Willy Tarreau7e98c052017-10-10 15:56:59 +02003494 default:
Willy Tarreau7838a792019-08-12 18:42:03 +02003495 TRACE_PROTO("receiving H2 ignored frame", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003496 /* drop frames that we ignore. They may be larger than
3497 * the buffer so we drain all of their contents until
3498 * we reach the end.
3499 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003500 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3501 b_del(&h2c->dbuf, ret);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003502 h2c->dfl -= ret;
3503 ret = h2c->dfl == 0;
3504 }
3505
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003506 strm_err:
Willy Tarreaua20a5192017-12-27 11:02:06 +01003507 /* We may have to send an RST if not done yet */
Willy Tarreau7838a792019-08-12 18:42:03 +02003508 if (h2s->st == H2_SS_ERROR) {
3509 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 +01003510 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003511 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003512
Willy Tarreau7838a792019-08-12 18:42:03 +02003513 if (h2c->st0 == H2_CS_FRAME_E) {
3514 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 +01003515 ret = h2c_send_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003516 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003517
Willy Tarreau7e98c052017-10-10 15:56:59 +02003518 /* error or missing data condition met above ? */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003519 if (ret <= 0)
Willy Tarreau7e98c052017-10-10 15:56:59 +02003520 break;
3521
3522 if (h2c->st0 != H2_CS_FRAME_H) {
Willy Tarreaubba7a4d2020-09-18 07:41:28 +02003523 if (h2c->dfl)
3524 TRACE_DEVEL("skipping remaining frame payload", H2_EV_RX_FRAME, h2c->conn, h2s);
Christopher Faulet5112a602019-09-26 16:38:28 +02003525 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3526 b_del(&h2c->dbuf, ret);
3527 h2c->dfl -= ret;
3528 if (!h2c->dfl) {
3529 TRACE_STATE("switching to FRAME_H", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
3530 h2c->st0 = H2_CS_FRAME_H;
3531 h2c->dsi = -1;
3532 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003533 }
3534 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003535
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003536 if (h2c->rcvd_c > 0 &&
Willy Tarreau7838a792019-08-12 18:42:03 +02003537 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))) {
3538 TRACE_PROTO("sending H2 WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003539 h2c_send_conn_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003540 }
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003541
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003542 done:
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003543 if (h2c->st0 >= H2_CS_ERROR || (h2c->flags & H2_CF_DEM_SHORT_READ)) {
3544 if (h2c->flags & H2_CF_RCVD_SHUT)
3545 h2c->flags |= H2_CF_END_REACHED;
3546 }
3547
Willy Tarreau567beb82018-12-18 16:52:44 +01003548 if (h2s && h2s->cs &&
3549 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003550 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003551 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003552 (h2s->flags & H2_SF_ES_RCVD) ||
3553 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003554 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003555 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 +01003556 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003557 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003558 }
Willy Tarreau1ed87b72018-11-25 08:45:16 +01003559
Willy Tarreau7838a792019-08-12 18:42:03 +02003560 if (old_iw != h2c->miw) {
3561 TRACE_STATE("notifying streams about SFCTL increase", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003562 h2c_unblock_sfctl(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003563 }
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003564
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003565 h2c_restart_reading(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02003566 out:
3567 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003568 return;
Willy Tarreaubc933932017-10-09 16:21:43 +02003569}
3570
Willy Tarreau989539b2020-01-10 17:01:29 +01003571/* resume each h2s eligible for sending in list head <head> */
3572static void h2_resume_each_sending_h2s(struct h2c *h2c, struct list *head)
3573{
3574 struct h2s *h2s, *h2s_back;
3575
3576 TRACE_ENTER(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3577
3578 list_for_each_entry_safe(h2s, h2s_back, head, list) {
3579 if (h2c->mws <= 0 ||
3580 h2c->flags & H2_CF_MUX_BLOCK_ANY ||
3581 h2c->st0 >= H2_CS_ERROR)
3582 break;
3583
3584 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003585
Willy Tarreaud9464162020-01-10 18:25:07 +01003586 if (h2s->flags & H2_SF_NOTIFIED)
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003587 continue;
3588
Willy Tarreau5723f292020-01-10 15:16:57 +01003589 /* If the sender changed his mind and unsubscribed, let's just
3590 * remove the stream from the send_list.
Willy Tarreau989539b2020-01-10 17:01:29 +01003591 */
Willy Tarreauf96508a2020-01-10 11:12:48 +01003592 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) &&
3593 (!h2s->subs || !(h2s->subs->events & SUB_RETRY_SEND))) {
Willy Tarreau989539b2020-01-10 17:01:29 +01003594 LIST_DEL_INIT(&h2s->list);
3595 continue;
3596 }
3597
Willy Tarreauf96508a2020-01-10 11:12:48 +01003598 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau5723f292020-01-10 15:16:57 +01003599 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01003600 tasklet_wakeup(h2s->subs->tasklet);
3601 h2s->subs->events &= ~SUB_RETRY_SEND;
3602 if (!h2s->subs->events)
3603 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01003604 }
3605 else if (h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) {
3606 tasklet_wakeup(h2s->shut_tl);
3607 }
Willy Tarreau989539b2020-01-10 17:01:29 +01003608 }
3609
3610 TRACE_LEAVE(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3611}
3612
Willy Tarreaubc933932017-10-09 16:21:43 +02003613/* process Tx frames from streams to be multiplexed. Returns > 0 if it reached
3614 * the end.
3615 */
3616static int h2_process_mux(struct h2c *h2c)
3617{
Willy Tarreau7838a792019-08-12 18:42:03 +02003618 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3619
Willy Tarreau01b44822018-10-03 14:26:37 +02003620 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3621 if (unlikely(h2c->st0 == H2_CS_PREFACE && (h2c->flags & H2_CF_IS_BACK))) {
3622 if (unlikely(h2c_bck_send_preface(h2c) <= 0)) {
3623 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003624 if (h2c->st0 == H2_CS_ERROR)
Willy Tarreau01b44822018-10-03 14:26:37 +02003625 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau01b44822018-10-03 14:26:37 +02003626 goto fail;
3627 }
3628 h2c->st0 = H2_CS_SETTINGS1;
3629 }
3630 /* need to wait for the other side */
Willy Tarreau75a930a2018-12-12 08:03:58 +01003631 if (h2c->st0 < H2_CS_FRAME_H)
Willy Tarreau7838a792019-08-12 18:42:03 +02003632 goto done;
Willy Tarreau01b44822018-10-03 14:26:37 +02003633 }
3634
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003635 /* start by sending possibly pending window updates */
Willy Tarreaue74679a2019-08-06 15:39:32 +02003636 if (h2c->rcvd_s > 0 &&
3637 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3638 h2c_send_strm_wu(h2c) < 0)
3639 goto fail;
3640
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003641 if (h2c->rcvd_c > 0 &&
3642 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3643 h2c_send_conn_wu(h2c) < 0)
3644 goto fail;
3645
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003646 /* First we always process the flow control list because the streams
3647 * waiting there were already elected for immediate emission but were
3648 * blocked just on this.
3649 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003650 h2_resume_each_sending_h2s(h2c, &h2c->fctl_list);
3651 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003652
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003653 fail:
Willy Tarreau3eabe9b2017-11-07 11:03:01 +01003654 if (unlikely(h2c->st0 >= H2_CS_ERROR)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02003655 if (h2c->st0 == H2_CS_ERROR) {
3656 if (h2c->max_id >= 0) {
3657 h2c_send_goaway_error(h2c, NULL);
3658 if (h2c->flags & H2_CF_MUX_BLOCK_ANY)
Willy Tarreau7838a792019-08-12 18:42:03 +02003659 goto out0;
Willy Tarreau081d4722017-05-16 21:51:05 +02003660 }
3661
3662 h2c->st0 = H2_CS_ERROR2; // sent (or failed hard) !
3663 }
Willy Tarreau081d4722017-05-16 21:51:05 +02003664 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003665 done:
3666 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
3667 return 1;
3668 out0:
3669 TRACE_DEVEL("leaving in blocked situation", H2_EV_H2C_WAKE, h2c->conn);
3670 return 0;
Willy Tarreaubc933932017-10-09 16:21:43 +02003671}
3672
Willy Tarreau62f52692017-10-08 23:01:42 +02003673
Willy Tarreau479998a2018-11-18 06:30:59 +01003674/* Attempt to read data, and subscribe if none available.
3675 * The function returns 1 if data has been received, otherwise zero.
3676 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003677static int h2_recv(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003678{
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003679 struct connection *conn = h2c->conn;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003680 struct buffer *buf;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003681 int max;
Olivier Houchard7505f942018-08-21 18:10:44 +02003682 size_t ret;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003683
Willy Tarreau7838a792019-08-12 18:42:03 +02003684 TRACE_ENTER(H2_EV_H2C_RECV, h2c->conn);
3685
3686 if (h2c->wait_event.events & SUB_RETRY_RECV) {
3687 TRACE_DEVEL("leaving on sub_recv", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003688 return (b_data(&h2c->dbuf));
Willy Tarreau7838a792019-08-12 18:42:03 +02003689 }
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003690
Willy Tarreau7838a792019-08-12 18:42:03 +02003691 if (!h2_recv_allowed(h2c)) {
3692 TRACE_DEVEL("leaving on !recv_allowed", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003693 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003694 }
Willy Tarreaua2af5122017-10-09 11:56:46 +02003695
Willy Tarreau44e973f2018-03-01 17:49:30 +01003696 buf = h2_get_buf(h2c, &h2c->dbuf);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003697 if (!buf) {
3698 h2c->flags |= H2_CF_DEM_DALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02003699 TRACE_DEVEL("leaving on !alloc", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003700 return 0;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003701 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003702
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003703 if (h2c->flags & H2_CF_RCVD_SHUT) {
3704 TRACE_DEVEL("leaving on rcvd_shut", H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau49acac02021-11-19 11:41:10 +01003705 return 1;
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003706 }
3707
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003708 if (!b_data(buf)) {
3709 /* try to pre-align the buffer like the
3710 * rxbufs will be to optimize memory copies. We'll make
3711 * sure that the frame header lands at the end of the
3712 * HTX block to alias it upon recv. We cannot use the
3713 * head because rcv_buf() will realign the buffer if
3714 * it's empty. Thus we cheat and pretend we already
3715 * have a few bytes there.
3716 */
3717 max = buf_room_for_htx_data(buf) + 9;
3718 buf->head = sizeof(struct htx) - 9;
3719 }
3720 else
3721 max = b_room(buf);
Willy Tarreau2a59e872018-12-12 08:23:47 +01003722
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003723 ret = max ? conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0) : 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003724
Christopher Fauletde9d6052021-04-23 12:25:18 +02003725 if (max && !ret && h2_recv_allowed(h2c)) {
3726 TRACE_DATA("failed to receive data, subscribing", H2_EV_H2C_RECV, h2c->conn);
3727 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h2c->wait_event);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003728 } else if (ret) {
Willy Tarreau022e5e52020-09-10 09:33:15 +02003729 TRACE_DATA("received data", H2_EV_H2C_RECV, h2c->conn, 0, 0, (void*)(long)ret);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003730 h2c->flags &= ~H2_CF_DEM_SHORT_READ;
3731 }
Olivier Houchard81a15af2018-10-19 17:26:49 +02003732
Christopher Fauletde9d6052021-04-23 12:25:18 +02003733 if (conn_xprt_read0_pending(h2c->conn)) {
3734 TRACE_DATA("received read0", H2_EV_H2C_RECV, h2c->conn);
3735 h2c->flags |= H2_CF_RCVD_SHUT;
3736 }
3737
Olivier Houcharda1411e62018-08-17 18:42:48 +02003738 if (!b_data(buf)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +01003739 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02003740 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard46677732018-11-29 17:06:17 +01003741 return (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003742 }
3743
Willy Tarreau7838a792019-08-12 18:42:03 +02003744 if (b_data(buf) == buf->size) {
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003745 h2c->flags |= H2_CF_DEM_DFULL;
Willy Tarreau35fb8462019-10-02 11:05:46 +02003746 TRACE_STATE("demux buffer full", H2_EV_H2C_RECV|H2_EV_H2C_BLK, h2c->conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003747 }
3748
3749 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003750 return !!ret || (conn->flags & CO_FL_ERROR) || conn_xprt_read0_pending(conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003751}
3752
Willy Tarreau479998a2018-11-18 06:30:59 +01003753/* Try to send data if possible.
3754 * The function returns 1 if data have been sent, otherwise zero.
3755 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003756static int h2_send(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003757{
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003758 struct connection *conn = h2c->conn;
Willy Tarreaubc933932017-10-09 16:21:43 +02003759 int done;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003760 int sent = 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003761
Willy Tarreau7838a792019-08-12 18:42:03 +02003762 TRACE_ENTER(H2_EV_H2C_SEND, h2c->conn);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003763
Willy Tarreau7838a792019-08-12 18:42:03 +02003764 if (conn->flags & CO_FL_ERROR) {
3765 TRACE_DEVEL("leaving on error", H2_EV_H2C_SEND, h2c->conn);
3766 return 1;
3767 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003768
Willy Tarreau911db9b2020-01-23 16:27:54 +01003769 if (conn->flags & CO_FL_WAIT_XPRT) {
Willy Tarreaua2af5122017-10-09 11:56:46 +02003770 /* a handshake was requested */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003771 goto schedule;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003772 }
3773
Willy Tarreaubc933932017-10-09 16:21:43 +02003774 /* This loop is quite simple : it tries to fill as much as it can from
3775 * pending streams into the existing buffer until it's reportedly full
3776 * or the end of send requests is reached. Then it tries to send this
3777 * buffer's contents out, marks it not full if at least one byte could
3778 * be sent, and tries again.
3779 *
3780 * The snd_buf() function normally takes a "flags" argument which may
3781 * be made of a combination of CO_SFL_MSG_MORE to indicate that more
3782 * data immediately comes and CO_SFL_STREAMER to indicate that the
3783 * connection is streaming lots of data (used to increase TLS record
3784 * size at the expense of latency). The former can be sent any time
3785 * there's a buffer full flag, as it indicates at least one stream
3786 * attempted to send and failed so there are pending data. An
3787 * alternative would be to set it as long as there's an active stream
3788 * but that would be problematic for ACKs until we have an absolute
3789 * guarantee that all waiters have at least one byte to send. The
3790 * latter should possibly not be set for now.
3791 */
3792
3793 done = 0;
3794 while (!done) {
3795 unsigned int flags = 0;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003796 unsigned int released = 0;
3797 struct buffer *buf;
Willy Tarreaubc933932017-10-09 16:21:43 +02003798
3799 /* fill as much as we can into the current buffer */
3800 while (((h2c->flags & (H2_CF_MUX_MFULL|H2_CF_MUX_MALLOC)) == 0) && !done)
3801 done = h2_process_mux(h2c);
3802
Olivier Houchard2b094432019-01-29 18:28:36 +01003803 if (h2c->flags & H2_CF_MUX_MALLOC)
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003804 done = 1; // we won't go further without extra buffers
Olivier Houchard2b094432019-01-29 18:28:36 +01003805
Christopher Faulet9a3d3fc2020-10-22 16:24:58 +02003806 if ((conn->flags & (CO_FL_SOCK_WR_SH|CO_FL_ERROR)) ||
Willy Tarreaue90653b2021-10-21 17:30:06 +02003807 (h2c->flags & H2_CF_GOAWAY_FAILED))
Willy Tarreaubc933932017-10-09 16:21:43 +02003808 break;
3809
3810 if (h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))
3811 flags |= CO_SFL_MSG_MORE;
3812
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003813 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3814 if (b_data(buf)) {
3815 int ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, buf, b_data(buf), flags);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003816 if (!ret) {
3817 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003818 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003819 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003820 sent = 1;
Willy Tarreau022e5e52020-09-10 09:33:15 +02003821 TRACE_DATA("sent data", H2_EV_H2C_SEND, h2c->conn, 0, buf, (void*)(long)ret);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003822 b_del(buf, ret);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003823 if (b_data(buf)) {
3824 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003825 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003826 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003827 }
3828 b_free(buf);
3829 released++;
Willy Tarreau787db9a2018-06-14 18:31:46 +02003830 }
Willy Tarreaubc933932017-10-09 16:21:43 +02003831
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003832 if (released)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01003833 offer_buffers(NULL, released);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003834
Willy Tarreaubc933932017-10-09 16:21:43 +02003835 /* wrote at least one byte, the buffer is not full anymore */
Christopher Faulet69fe5ce2019-10-24 10:31:01 +02003836 if (sent)
3837 h2c->flags &= ~(H2_CF_MUX_MFULL | H2_CF_DEM_MROOM);
Willy Tarreaubc933932017-10-09 16:21:43 +02003838 }
3839
Willy Tarreaua2af5122017-10-09 11:56:46 +02003840 if (conn->flags & CO_FL_SOCK_WR_SH) {
3841 /* output closed, nothing to send, clear the buffer to release it */
Willy Tarreau51330962019-05-26 09:38:07 +02003842 b_reset(br_tail(h2c->mbuf));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003843 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02003844 /* We're not full anymore, so we can wake any task that are waiting
3845 * for us.
3846 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003847 if (!(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM)) && h2c->st0 >= H2_CS_FRAME_H)
3848 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01003849
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003850 /* We're done, no more to send */
Willy Tarreau7838a792019-08-12 18:42:03 +02003851 if (!br_data(h2c->mbuf)) {
3852 TRACE_DEVEL("leaving with everything sent", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003853 return sent;
Willy Tarreau7838a792019-08-12 18:42:03 +02003854 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003855schedule:
Willy Tarreau7838a792019-08-12 18:42:03 +02003856 if (!(conn->flags & CO_FL_ERROR) && !(h2c->wait_event.events & SUB_RETRY_SEND)) {
3857 TRACE_STATE("more data to send, subscribing", H2_EV_H2C_SEND, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003858 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003859 }
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003860
Willy Tarreau7838a792019-08-12 18:42:03 +02003861 TRACE_DEVEL("leaving with some data left to send", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003862 return sent;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003863}
3864
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003865/* this is the tasklet referenced in h2c->wait_event.tasklet */
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003866struct task *h2_io_cb(struct task *t, void *ctx, unsigned int state)
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003867{
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003868 struct connection *conn;
3869 struct tasklet *tl = (struct tasklet *)t;
3870 int conn_in_list;
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003871 struct h2c *h2c = ctx;
Olivier Houchard7505f942018-08-21 18:10:44 +02003872 int ret = 0;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003873
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003874 if (state & TASK_F_USR1) {
3875 /* the tasklet was idling on an idle connection, it might have
3876 * been stolen, let's be careful!
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003877 */
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003878 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3879 if (t->context == NULL) {
3880 /* The connection has been taken over by another thread,
3881 * we're no longer responsible for it, so just free the
3882 * tasklet, and do nothing.
3883 */
3884 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3885 tasklet_free(tl);
Willy Tarreau74163142021-03-13 11:30:19 +01003886 t = NULL;
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003887 goto leave;
3888 }
3889 conn = h2c->conn;
3890 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003891
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003892 conn_in_list = conn->flags & CO_FL_LIST_MASK;
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003893
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003894 /* Remove the connection from the list, to be sure nobody attempts
3895 * to use it while we handle the I/O events
3896 */
3897 if (conn_in_list)
3898 conn_delete_from_tree(&conn->hash_node->node);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003899
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003900 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3901 } else {
3902 /* we're certain the connection was not in an idle list */
3903 conn = h2c->conn;
3904 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3905 conn_in_list = 0;
3906 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003907
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003908 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchard7505f942018-08-21 18:10:44 +02003909 ret = h2_send(h2c);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003910 if (!(h2c->wait_event.events & SUB_RETRY_RECV))
Olivier Houchard7505f942018-08-21 18:10:44 +02003911 ret |= h2_recv(h2c);
Willy Tarreaucef5c8e2018-12-18 10:29:54 +01003912 if (ret || b_data(&h2c->dbuf))
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003913 ret = h2_process(h2c);
3914
3915 /* If we were in an idle list, we want to add it back into it,
3916 * unless h2_process() returned -1, which mean it has destroyed
3917 * the connection (testing !ret is enough, if h2_process() wasn't
3918 * called then ret will be 0 anyway.
3919 */
Willy Tarreau74163142021-03-13 11:30:19 +01003920 if (ret < 0)
3921 t = NULL;
3922
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003923 if (!ret && conn_in_list) {
3924 struct server *srv = objt_server(conn->target);
3925
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01003926 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003927 if (conn_in_list == CO_FL_SAFE_LIST)
Willy Tarreau430bf4a2021-03-04 09:45:32 +01003928 ebmb_insert(&srv->per_thr[tid].safe_conns, &conn->hash_node->node, sizeof(conn->hash_node->hash));
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003929 else
Willy Tarreau430bf4a2021-03-04 09:45:32 +01003930 ebmb_insert(&srv->per_thr[tid].idle_conns, &conn->hash_node->node, sizeof(conn->hash_node->hash));
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01003931 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003932 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003933
Willy Tarreau38468772020-06-28 00:31:13 +02003934leave:
Willy Tarreau7838a792019-08-12 18:42:03 +02003935 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreau74163142021-03-13 11:30:19 +01003936 return t;
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003937}
Willy Tarreaua2af5122017-10-09 11:56:46 +02003938
Willy Tarreau62f52692017-10-08 23:01:42 +02003939/* callback called on any event by the connection handler.
3940 * It applies changes and returns zero, or < 0 if it wants immediate
3941 * destruction of the connection (which normally doesn not happen in h2).
3942 */
Olivier Houchard7505f942018-08-21 18:10:44 +02003943static int h2_process(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003944{
Olivier Houchard7505f942018-08-21 18:10:44 +02003945 struct connection *conn = h2c->conn;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003946
Willy Tarreau7838a792019-08-12 18:42:03 +02003947 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3948
Willy Tarreauf0961222021-02-05 11:41:46 +01003949 if (!(h2c->flags & H2_CF_DEM_BLOCK_ANY) &&
3950 (b_data(&h2c->dbuf) || (h2c->flags & H2_CF_RCVD_SHUT))) {
Willy Tarreaud13bf272017-12-14 10:34:52 +01003951 h2_process_demux(h2c);
3952
3953 if (h2c->st0 >= H2_CS_ERROR || conn->flags & CO_FL_ERROR)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003954 b_reset(&h2c->dbuf);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003955
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003956 if (!b_full(&h2c->dbuf))
Willy Tarreaud13bf272017-12-14 10:34:52 +01003957 h2c->flags &= ~H2_CF_DEM_DFULL;
3958 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003959 h2_send(h2c);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003960
Willy Tarreaub1e600c2020-10-13 18:09:15 +02003961 if (unlikely(h2c->proxy->disabled) && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau8ec14062017-12-30 18:08:13 +01003962 /* frontend is stopping, reload likely in progress, let's try
3963 * to announce a graceful shutdown if not yet done. We don't
3964 * care if it fails, it will be tried again later.
3965 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003966 TRACE_STATE("proxy stopped, sending GOAWAY", H2_EV_H2C_WAKE|H2_EV_TX_FRAME, conn);
Willy Tarreau8ec14062017-12-30 18:08:13 +01003967 if (!(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
3968 if (h2c->last_sid < 0)
3969 h2c->last_sid = (1U << 31) - 1;
3970 h2c_send_goaway_error(h2c, NULL);
3971 }
3972 }
3973
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003974 /*
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003975 * If we received early data, and the handshake is done, wake
3976 * any stream that was waiting for it.
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003977 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003978 if (!(h2c->flags & H2_CF_WAIT_FOR_HS) &&
Willy Tarreau911db9b2020-01-23 16:27:54 +01003979 (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 +01003980 struct eb32_node *node;
3981 struct h2s *h2s;
3982
3983 h2c->flags |= H2_CF_WAIT_FOR_HS;
3984 node = eb32_lookup_ge(&h2c->streams_by_id, 1);
3985
3986 while (node) {
3987 h2s = container_of(node, struct h2s, by_id);
Willy Tarreaufde287c2018-12-19 18:33:16 +01003988 if (h2s->cs && h2s->cs->flags & CS_FL_WAIT_FOR_HS)
Willy Tarreau7e094452018-12-19 18:08:52 +01003989 h2s_notify_recv(h2s);
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003990 node = eb32_next(node);
3991 }
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003992 }
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003993
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003994 if (conn->flags & CO_FL_ERROR || h2c_read0_pending(h2c) ||
Willy Tarreau29a98242017-10-31 06:59:15 +01003995 h2c->st0 == H2_CS_ERROR2 || h2c->flags & H2_CF_GOAWAY_FAILED ||
3996 (eb_is_empty(&h2c->streams_by_id) && h2c->last_sid >= 0 &&
3997 h2c->max_id >= h2c->last_sid)) {
Willy Tarreau23482912019-05-07 15:23:14 +02003998 h2_wake_some_streams(h2c, 0);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003999
4000 if (eb_is_empty(&h2c->streams_by_id)) {
4001 /* no more stream, kill the connection now */
Christopher Faulet73c12072019-04-08 11:23:22 +02004002 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004003 TRACE_DEVEL("leaving after releasing the connection", H2_EV_H2C_WAKE);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004004 return -1;
4005 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004006
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 Tarreau4481e262019-10-31 15:36:30 +01004013 }
4014 else if (h2c->st0 == H2_CS_ERROR) {
4015 /* connections in error must be removed from the idle lists */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004016 if (conn->flags & CO_FL_LIST_MASK) {
4017 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004018 conn_delete_from_tree(&conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004019 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4020 }
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004021 }
4022
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004023 if (!b_data(&h2c->dbuf))
Willy Tarreau44e973f2018-03-01 17:49:30 +01004024 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004025
Olivier Houchard53216e72018-10-10 15:46:36 +02004026 if ((conn->flags & CO_FL_SOCK_WR_SH) ||
4027 h2c->st0 == H2_CS_ERROR2 || (h2c->flags & H2_CF_GOAWAY_FAILED) ||
4028 (h2c->st0 != H2_CS_ERROR &&
Willy Tarreau662fafc2019-05-26 09:43:07 +02004029 !br_data(h2c->mbuf) &&
Olivier Houchard53216e72018-10-10 15:46:36 +02004030 (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) &&
4031 ((h2c->flags & H2_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&h2c->send_list))))
Willy Tarreau2e3c0002019-05-26 09:45:23 +02004032 h2_release_mbuf(h2c);
Willy Tarreaua2af5122017-10-09 11:56:46 +02004033
Willy Tarreau3f133572017-10-31 19:21:06 +01004034 if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02004035 if (h2c_may_expire(h2c))
4036 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
4037 else
4038 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02004039 task_queue(h2c->task);
Willy Tarreauea392822017-10-31 10:02:25 +01004040 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02004041
Olivier Houchard7505f942018-08-21 18:10:44 +02004042 h2_send(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004043 TRACE_LEAVE(H2_EV_H2C_WAKE, conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02004044 return 0;
4045}
4046
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004047/* wake-up function called by the connection layer (mux_ops.wake) */
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004048static int h2_wake(struct connection *conn)
4049{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004050 struct h2c *h2c = conn->ctx;
Willy Tarreau7838a792019-08-12 18:42:03 +02004051 int ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004052
Willy Tarreau7838a792019-08-12 18:42:03 +02004053 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
4054 ret = h2_process(h2c);
Willy Tarreau508f9892020-02-11 04:38:56 +01004055 if (ret >= 0)
4056 h2_wake_some_streams(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02004057 TRACE_LEAVE(H2_EV_H2C_WAKE);
4058 return ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004059}
4060
Willy Tarreauea392822017-10-31 10:02:25 +01004061/* Connection timeout management. The principle is that if there's no receipt
4062 * nor sending for a certain amount of time, the connection is closed. If the
4063 * MUX buffer still has lying data or is not allocatable, the connection is
4064 * immediately killed. If it's allocatable and empty, we attempt to send a
4065 * GOAWAY frame.
4066 */
Willy Tarreau144f84a2021-03-02 16:09:26 +01004067struct task *h2_timeout_task(struct task *t, void *context, unsigned int state)
Willy Tarreauea392822017-10-31 10:02:25 +01004068{
Olivier Houchard9f6af332018-05-25 14:04:04 +02004069 struct h2c *h2c = context;
Willy Tarreauea392822017-10-31 10:02:25 +01004070 int expired = tick_is_expired(t->expire, now_ms);
4071
Willy Tarreau7838a792019-08-12 18:42:03 +02004072 TRACE_ENTER(H2_EV_H2C_WAKE, h2c ? h2c->conn : NULL);
4073
Willy Tarreaubd42e922020-06-30 11:19:23 +02004074 if (h2c) {
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004075 /* Make sure nobody stole the connection from us */
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004076 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004077
4078 /* Somebody already stole the connection from us, so we should not
4079 * free it, we just have to free the task.
4080 */
4081 if (!t->context) {
4082 h2c = NULL;
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004083 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004084 goto do_leave;
4085 }
4086
4087
Willy Tarreaubd42e922020-06-30 11:19:23 +02004088 if (!expired) {
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004089 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004090 TRACE_DEVEL("leaving (not expired)", H2_EV_H2C_WAKE, h2c->conn);
4091 return t;
4092 }
Willy Tarreauea392822017-10-31 10:02:25 +01004093
Willy Tarreaubd42e922020-06-30 11:19:23 +02004094 if (!h2c_may_expire(h2c)) {
4095 /* we do still have streams but all of them are idle, waiting
4096 * for the data layer, so we must not enforce the timeout here.
4097 */
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004098 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004099 t->expire = TICK_ETERNITY;
4100 return t;
4101 }
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02004102
Willy Tarreaubd42e922020-06-30 11:19:23 +02004103 /* We're about to destroy the connection, so make sure nobody attempts
4104 * to steal it from us.
4105 */
Willy Tarreaubd42e922020-06-30 11:19:23 +02004106 if (h2c->conn->flags & CO_FL_LIST_MASK)
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004107 conn_delete_from_tree(&h2c->conn->hash_node->node);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004108
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004109 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004110 }
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004111
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004112do_leave:
Olivier Houchard3f795f72019-04-17 22:51:06 +02004113 task_destroy(t);
Willy Tarreau0975f112018-03-29 15:22:59 +02004114
4115 if (!h2c) {
4116 /* resources were already deleted */
Willy Tarreau7838a792019-08-12 18:42:03 +02004117 TRACE_DEVEL("leaving (not more h2c)", H2_EV_H2C_WAKE);
Willy Tarreau0975f112018-03-29 15:22:59 +02004118 return NULL;
4119 }
4120
4121 h2c->task = NULL;
Willy Tarreauea392822017-10-31 10:02:25 +01004122 h2c_error(h2c, H2_ERR_NO_ERROR);
Willy Tarreau23482912019-05-07 15:23:14 +02004123 h2_wake_some_streams(h2c, 0);
Willy Tarreauea392822017-10-31 10:02:25 +01004124
Willy Tarreau662fafc2019-05-26 09:43:07 +02004125 if (br_data(h2c->mbuf)) {
Willy Tarreauea392822017-10-31 10:02:25 +01004126 /* don't even try to send a GOAWAY, the buffer is stuck */
4127 h2c->flags |= H2_CF_GOAWAY_FAILED;
4128 }
4129
4130 /* try to send but no need to insist */
Willy Tarreau599391a2017-11-24 10:16:00 +01004131 h2c->last_sid = h2c->max_id;
Willy Tarreauea392822017-10-31 10:02:25 +01004132 if (h2c_send_goaway_error(h2c, NULL) <= 0)
4133 h2c->flags |= H2_CF_GOAWAY_FAILED;
4134
Willy Tarreau662fafc2019-05-26 09:43:07 +02004135 if (br_data(h2c->mbuf) && !(h2c->flags & H2_CF_GOAWAY_FAILED) && conn_xprt_ready(h2c->conn)) {
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004136 unsigned int released = 0;
4137 struct buffer *buf;
4138
4139 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
4140 if (b_data(buf)) {
4141 int ret = h2c->conn->xprt->snd_buf(h2c->conn, h2c->conn->xprt_ctx, buf, b_data(buf), 0);
4142 if (!ret)
4143 break;
4144 b_del(buf, ret);
4145 if (b_data(buf))
4146 break;
4147 b_free(buf);
4148 released++;
4149 }
Willy Tarreau787db9a2018-06-14 18:31:46 +02004150 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004151
4152 if (released)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01004153 offer_buffers(NULL, released);
Willy Tarreau787db9a2018-06-14 18:31:46 +02004154 }
Willy Tarreauea392822017-10-31 10:02:25 +01004155
Willy Tarreau4481e262019-10-31 15:36:30 +01004156 /* in any case this connection must not be considered idle anymore */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004157 if (h2c->conn->flags & CO_FL_LIST_MASK) {
4158 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004159 conn_delete_from_tree(&h2c->conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004160 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4161 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004162
Willy Tarreau0975f112018-03-29 15:22:59 +02004163 /* either we can release everything now or it will be done later once
4164 * the last stream closes.
4165 */
4166 if (eb_is_empty(&h2c->streams_by_id))
Christopher Faulet73c12072019-04-08 11:23:22 +02004167 h2_release(h2c);
Willy Tarreauea392822017-10-31 10:02:25 +01004168
Willy Tarreau7838a792019-08-12 18:42:03 +02004169 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreauea392822017-10-31 10:02:25 +01004170 return NULL;
4171}
4172
4173
Willy Tarreau62f52692017-10-08 23:01:42 +02004174/*******************************************/
4175/* functions below are used by the streams */
4176/*******************************************/
4177
4178/*
4179 * Attach a new stream to a connection
4180 * (Used for outgoing connections)
4181 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01004182static struct conn_stream *h2_attach(struct connection *conn, struct session *sess)
Willy Tarreau62f52692017-10-08 23:01:42 +02004183{
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004184 struct conn_stream *cs;
4185 struct h2s *h2s;
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004186 struct h2c *h2c = conn->ctx;
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004187
Willy Tarreau7838a792019-08-12 18:42:03 +02004188 TRACE_ENTER(H2_EV_H2S_NEW, conn);
Christopher Faulet236c93b2020-07-02 09:19:54 +02004189 cs = cs_new(conn, conn->target);
Willy Tarreau7838a792019-08-12 18:42:03 +02004190 if (!cs) {
4191 TRACE_DEVEL("leaving on CS allocation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004192 return NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004193 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01004194 h2s = h2c_bck_stream_new(h2c, cs, sess);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004195 if (!h2s) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004196 TRACE_DEVEL("leaving on stream creation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004197 cs_free(cs);
4198 return NULL;
4199 }
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004200
4201 /* the connection is not idle anymore, let's mark this */
4202 HA_ATOMIC_AND(&h2c->wait_event.tasklet->state, ~TASK_F_USR1);
Willy Tarreau4f8cd432021-03-02 17:27:58 +01004203 xprt_set_used(h2c->conn, h2c->conn->xprt, h2c->conn->xprt_ctx);
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004204
Willy Tarreau7838a792019-08-12 18:42:03 +02004205 TRACE_LEAVE(H2_EV_H2S_NEW, conn, h2s);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004206 return cs;
Willy Tarreau62f52692017-10-08 23:01:42 +02004207}
4208
Willy Tarreaufafd3982018-11-18 21:29:20 +01004209/* Retrieves the first valid conn_stream from this connection, or returns NULL.
4210 * We have to scan because we may have some orphan streams. It might be
4211 * beneficial to scan backwards from the end to reduce the likeliness to find
4212 * orphans.
4213 */
4214static const struct conn_stream *h2_get_first_cs(const struct connection *conn)
4215{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004216 struct h2c *h2c = conn->ctx;
Willy Tarreaufafd3982018-11-18 21:29:20 +01004217 struct h2s *h2s;
4218 struct eb32_node *node;
4219
4220 node = eb32_first(&h2c->streams_by_id);
4221 while (node) {
4222 h2s = container_of(node, struct h2s, by_id);
4223 if (h2s->cs)
4224 return h2s->cs;
4225 node = eb32_next(node);
4226 }
4227 return NULL;
4228}
4229
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004230static int h2_ctl(struct connection *conn, enum mux_ctl_type mux_ctl, void *output)
4231{
4232 int ret = 0;
4233 struct h2c *h2c = conn->ctx;
4234
4235 switch (mux_ctl) {
4236 case MUX_STATUS:
4237 /* Only consider the mux to be ready if we're done with
4238 * the preface and settings, and we had no error.
4239 */
4240 if (h2c->st0 >= H2_CS_FRAME_H && h2c->st0 < H2_CS_ERROR)
4241 ret |= MUX_STATUS_READY;
4242 return ret;
Christopher Faulet4c8ad842020-10-06 14:59:17 +02004243 case MUX_EXIT_STATUS:
4244 return MUX_ES_UNKNOWN;
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004245 default:
4246 return -1;
4247 }
4248}
4249
Willy Tarreau62f52692017-10-08 23:01:42 +02004250/*
Olivier Houchard060ed432018-11-06 16:32:42 +01004251 * Destroy the mux and the associated connection, if it is no longer used
4252 */
Christopher Faulet73c12072019-04-08 11:23:22 +02004253static void h2_destroy(void *ctx)
Olivier Houchard060ed432018-11-06 16:32:42 +01004254{
Christopher Faulet73c12072019-04-08 11:23:22 +02004255 struct h2c *h2c = ctx;
Olivier Houchard060ed432018-11-06 16:32:42 +01004256
Willy Tarreau7838a792019-08-12 18:42:03 +02004257 TRACE_ENTER(H2_EV_H2C_END, h2c->conn);
Christopher Faulet39a96ee2019-04-08 10:52:21 +02004258 if (eb_is_empty(&h2c->streams_by_id) || !h2c->conn || h2c->conn->ctx != h2c)
Christopher Faulet73c12072019-04-08 11:23:22 +02004259 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004260 TRACE_LEAVE(H2_EV_H2C_END);
Olivier Houchard060ed432018-11-06 16:32:42 +01004261}
4262
4263/*
Willy Tarreau62f52692017-10-08 23:01:42 +02004264 * Detach the stream from the connection and possibly release the connection.
4265 */
4266static void h2_detach(struct conn_stream *cs)
4267{
Willy Tarreau60935142017-10-16 18:11:19 +02004268 struct h2s *h2s = cs->ctx;
4269 struct h2c *h2c;
Olivier Houchardf502aca2018-12-14 19:42:40 +01004270 struct session *sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004271
Willy Tarreau7838a792019-08-12 18:42:03 +02004272 TRACE_ENTER(H2_EV_STRM_END, h2s ? h2s->h2c->conn : NULL, h2s);
4273
Willy Tarreau60935142017-10-16 18:11:19 +02004274 cs->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004275 if (!h2s) {
4276 TRACE_LEAVE(H2_EV_STRM_END);
Willy Tarreau60935142017-10-16 18:11:19 +02004277 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004278 }
Willy Tarreau60935142017-10-16 18:11:19 +02004279
Willy Tarreaud9464162020-01-10 18:25:07 +01004280 /* there's no txbuf so we're certain not to be able to send anything */
4281 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02004282
Olivier Houchardf502aca2018-12-14 19:42:40 +01004283 sess = h2s->sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004284 h2c = h2s->h2c;
4285 h2s->cs = NULL;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02004286 h2c->nb_cs--;
Willy Tarreaufa1d3572019-01-31 10:31:51 +01004287 if ((h2c->flags & (H2_CF_IS_BACK|H2_CF_DEM_TOOMANY)) == H2_CF_DEM_TOOMANY &&
4288 !h2_frt_has_too_many_cs(h2c)) {
4289 /* frontend connection was blocking new streams creation */
Willy Tarreauf2101912018-07-19 10:11:38 +02004290 h2c->flags &= ~H2_CF_DEM_TOOMANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004291 h2c_restart_reading(h2c, 1);
Willy Tarreauf2101912018-07-19 10:11:38 +02004292 }
Willy Tarreau60935142017-10-16 18:11:19 +02004293
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004294 /* this stream may be blocked waiting for some data to leave (possibly
4295 * an ES or RST frame), so orphan it in this case.
4296 */
Willy Tarreau3041fcc2018-03-29 15:41:32 +02004297 if (!(cs->conn->flags & CO_FL_ERROR) &&
Willy Tarreaua2b51812018-07-27 09:55:14 +02004298 (h2c->st0 < H2_CS_ERROR) &&
Willy Tarreau5723f292020-01-10 15:16:57 +01004299 (h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL)) &&
Willy Tarreauf96508a2020-01-10 11:12:48 +01004300 ((h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) || h2s->subs)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004301 TRACE_DEVEL("leaving on stream blocked", H2_EV_STRM_END|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004302 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004303 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004304
Willy Tarreau45f752e2017-10-30 15:44:59 +01004305 if ((h2c->flags & H2_CF_DEM_BLOCK_ANY && h2s->id == h2c->dsi) ||
4306 (h2c->flags & H2_CF_MUX_BLOCK_ANY && h2s->id == h2c->msi)) {
4307 /* unblock the connection if it was blocked on this
4308 * stream.
4309 */
4310 h2c->flags &= ~H2_CF_DEM_BLOCK_ANY;
4311 h2c->flags &= ~H2_CF_MUX_BLOCK_ANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004312 h2c_restart_reading(h2c, 1);
Willy Tarreau45f752e2017-10-30 15:44:59 +01004313 }
4314
Willy Tarreau71049cc2018-03-28 13:56:39 +02004315 h2s_destroy(h2s);
Willy Tarreau60935142017-10-16 18:11:19 +02004316
Christopher Faulet9b79a102019-07-15 11:22:56 +02004317 if (h2c->flags & H2_CF_IS_BACK) {
Olivier Houchard8a786902018-12-15 16:05:40 +01004318 if (!(h2c->conn->flags &
4319 (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH))) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004320 if (h2c->conn->flags & CO_FL_PRIVATE) {
Christopher Faulet08016ab2020-07-01 16:10:06 +02004321 /* Add the connection in the session server list, if not already done */
4322 if (!session_add_conn(sess, h2c->conn, h2c->conn->target)) {
4323 h2c->conn->owner = NULL;
4324 if (eb_is_empty(&h2c->streams_by_id)) {
4325 h2c->conn->mux->destroy(h2c);
4326 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4327 return;
Christopher Fauletc5579d12020-07-01 15:45:41 +02004328 }
4329 }
Christopher Faulet08016ab2020-07-01 16:10:06 +02004330 if (eb_is_empty(&h2c->streams_by_id)) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004331 if (session_check_idle_conn(h2c->conn->owner, h2c->conn) != 0) {
4332 /* At this point either the connection is destroyed, or it's been added to the server idle list, just stop */
4333 TRACE_DEVEL("leaving without reusable idle connection", H2_EV_STRM_END);
Olivier Houchard351411f2018-12-27 17:20:54 +01004334 return;
4335 }
4336 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004337 }
Christopher Fauletc5579d12020-07-01 15:45:41 +02004338 else {
4339 if (eb_is_empty(&h2c->streams_by_id)) {
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004340 /* If the connection is owned by the session, first remove it
4341 * from its list
4342 */
4343 if (h2c->conn->owner) {
4344 session_unown_conn(h2c->conn->owner, h2c->conn);
4345 h2c->conn->owner = NULL;
4346 }
4347
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004348 /* mark that the tasklet may lose its context to another thread and
4349 * that the handler needs to check it under the idle conns lock.
4350 */
4351 HA_ATOMIC_OR(&h2c->wait_event.tasklet->state, TASK_F_USR1);
Willy Tarreau4f8cd432021-03-02 17:27:58 +01004352 xprt_set_idle(h2c->conn, h2c->conn->xprt, h2c->conn->xprt_ctx);
4353
Olivier Houcharddc2f2752020-02-13 19:12:07 +01004354 if (!srv_add_to_idle_list(objt_server(h2c->conn->target), h2c->conn, 1)) {
Olivier Houchard2444aa52020-01-20 13:56:01 +01004355 /* The server doesn't want it, let's kill the connection right away */
4356 h2c->conn->mux->destroy(h2c);
4357 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4358 return;
4359 }
Olivier Houchard199d4fa2020-03-22 23:25:51 +01004360 /* At this point, the connection has been added to the
4361 * server idle list, so another thread may already have
4362 * hijacked it, so we can't do anything with it.
4363 */
Olivier Houchard2444aa52020-01-20 13:56:01 +01004364 TRACE_DEVEL("reusable idle connection", H2_EV_STRM_END);
4365 return;
Olivier Houchard8a786902018-12-15 16:05:40 +01004366
Olivier Houchard8a786902018-12-15 16:05:40 +01004367 }
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004368 else if (!h2c->conn->hash_node->node.node.leaf_p &&
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004369 h2_avail_streams(h2c->conn) > 0 && objt_server(h2c->conn->target) &&
Willy Tarreau2b718102021-04-21 07:32:39 +02004370 !LIST_INLIST(&h2c->conn->session_list)) {
Willy Tarreau430bf4a2021-03-04 09:45:32 +01004371 ebmb_insert(&__objt_server(h2c->conn->target)->per_thr[tid].avail_conns,
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004372 &h2c->conn->hash_node->node,
4373 sizeof(h2c->conn->hash_node->hash));
Christopher Fauletc5579d12020-07-01 15:45:41 +02004374 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004375 }
4376 }
4377 }
4378
Willy Tarreaue323f342018-03-28 13:51:45 +02004379 /* We don't want to close right now unless we're removing the
4380 * last stream, and either the connection is in error, or it
4381 * reached the ID already specified in a GOAWAY frame received
4382 * or sent (as seen by last_sid >= 0).
4383 */
Olivier Houchard7a977432019-03-21 15:47:13 +01004384 if (h2c_is_dead(h2c)) {
Willy Tarreaue323f342018-03-28 13:51:45 +02004385 /* no more stream will come, kill it now */
Willy Tarreau7838a792019-08-12 18:42:03 +02004386 TRACE_DEVEL("leaving and killing dead connection", H2_EV_STRM_END, h2c->conn);
Christopher Faulet73c12072019-04-08 11:23:22 +02004387 h2_release(h2c);
Willy Tarreaue323f342018-03-28 13:51:45 +02004388 }
4389 else if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02004390 if (h2c_may_expire(h2c))
4391 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
4392 else
4393 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02004394 task_queue(h2c->task);
Willy Tarreau7838a792019-08-12 18:42:03 +02004395 TRACE_DEVEL("leaving, refreshing connection's timeout", H2_EV_STRM_END, h2c->conn);
Willy Tarreau60935142017-10-16 18:11:19 +02004396 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004397 else
4398 TRACE_DEVEL("leaving", H2_EV_STRM_END, h2c->conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02004399}
4400
Willy Tarreau88bdba32019-05-13 18:17:53 +02004401/* Performs a synchronous or asynchronous shutr(). */
4402static void h2_do_shutr(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004403{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004404 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004405
Willy Tarreauf983d002019-05-14 10:40:21 +02004406 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004407 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004408
Willy Tarreau7838a792019-08-12 18:42:03 +02004409 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4410
Willy Tarreau18059042019-01-31 19:12:48 +01004411 /* a connstream may require us to immediately kill the whole connection
4412 * for example because of a "tcp-request content reject" rule that is
4413 * normally used to limit abuse. In this case we schedule a goaway to
4414 * close the connection.
Willy Tarreau926fa4c2017-11-07 14:42:12 +01004415 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004416 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004417 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004418 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004419 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4420 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4421 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004422 else if (!(h2s->flags & H2_SF_HEADERS_SENT)) {
4423 /* Nothing was never sent for this stream, so reset with
4424 * REFUSED_STREAM error to let the client retry the
4425 * request.
4426 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004427 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004428 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4429 }
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004430 else {
4431 /* a final response was already provided, we don't want this
4432 * stream anymore. This may happen when the server responds
4433 * before the end of an upload and closes quickly (redirect,
4434 * deny, ...)
4435 */
4436 h2s_error(h2s, H2_ERR_CANCEL);
4437 }
Willy Tarreau18059042019-01-31 19:12:48 +01004438
Willy Tarreau90c32322017-11-24 08:00:30 +01004439 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004440 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004441 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004442
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004443 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004444 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau00dd0782018-03-01 16:31:34 +01004445 h2s_close(h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004446 done:
4447 h2s->flags &= ~H2_SF_WANT_SHUTR;
Willy Tarreau7838a792019-08-12 18:42:03 +02004448 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004449 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004450add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004451 /* Let the handler know we want to shutr, and add ourselves to the
4452 * most relevant list if not yet done. h2_deferred_shut() will be
4453 * automatically called via the shut_tl tasklet when there's room
4454 * again.
4455 */
4456 h2s->flags |= H2_SF_WANT_SHUTR;
Willy Tarreau2b718102021-04-21 07:32:39 +02004457 if (!LIST_INLIST(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004458 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02004459 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004460 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Willy Tarreau2b718102021-04-21 07:32:39 +02004461 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004462 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004463 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004464 return;
Willy Tarreau62f52692017-10-08 23:01:42 +02004465}
4466
Willy Tarreau88bdba32019-05-13 18:17:53 +02004467/* Performs a synchronous or asynchronous shutw(). */
4468static void h2_do_shutw(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004469{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004470 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004471
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004472 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004473 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004474
Willy Tarreau7838a792019-08-12 18:42:03 +02004475 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4476
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004477 if (h2s->st != H2_SS_ERROR && (h2s->flags & H2_SF_HEADERS_SENT)) {
Willy Tarreau58e32082017-11-07 14:41:09 +01004478 /* we can cleanly close using an empty data frame only after headers */
4479
4480 if (!(h2s->flags & (H2_SF_ES_SENT|H2_SF_RST_SENT)) &&
4481 h2_send_empty_data_es(h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004482 goto add_to_list;
Willy Tarreau58e32082017-11-07 14:41:09 +01004483
4484 if (h2s->st == H2_SS_HREM)
Willy Tarreau00dd0782018-03-01 16:31:34 +01004485 h2s_close(h2s);
Willy Tarreau58e32082017-11-07 14:41:09 +01004486 else
4487 h2s->st = H2_SS_HLOC;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004488 } else {
Willy Tarreau18059042019-01-31 19:12:48 +01004489 /* a connstream may require us to immediately kill the whole connection
4490 * for example because of a "tcp-request content reject" rule that is
4491 * normally used to limit abuse. In this case we schedule a goaway to
4492 * close the connection.
Willy Tarreaua1349f02017-10-31 07:41:55 +01004493 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004494 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004495 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004496 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004497 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4498 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4499 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004500 else {
4501 /* Nothing was never sent for this stream, so reset with
4502 * REFUSED_STREAM error to let the client retry the
4503 * request.
4504 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004505 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004506 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4507 }
Willy Tarreau18059042019-01-31 19:12:48 +01004508
Willy Tarreau90c32322017-11-24 08:00:30 +01004509 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004510 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004511 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004512
Willy Tarreau00dd0782018-03-01 16:31:34 +01004513 h2s_close(h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004514 }
4515
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004516 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004517 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau7838a792019-08-12 18:42:03 +02004518
4519 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
4520
Willy Tarreau88bdba32019-05-13 18:17:53 +02004521 done:
4522 h2s->flags &= ~H2_SF_WANT_SHUTW;
4523 return;
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004524
4525 add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004526 /* Let the handler know we want to shutw, and add ourselves to the
4527 * most relevant list if not yet done. h2_deferred_shut() will be
4528 * automatically called via the shut_tl tasklet when there's room
4529 * again.
4530 */
4531 h2s->flags |= H2_SF_WANT_SHUTW;
Willy Tarreau2b718102021-04-21 07:32:39 +02004532 if (!LIST_INLIST(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004533 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02004534 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004535 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Willy Tarreau2b718102021-04-21 07:32:39 +02004536 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004537 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004538 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004539 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004540}
4541
Willy Tarreau5723f292020-01-10 15:16:57 +01004542/* This is the tasklet referenced in h2s->shut_tl, it is used for
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004543 * deferred shutdowns when the h2_detach() was done but the mux buffer was full
4544 * and prevented the last frame from being emitted.
4545 */
Willy Tarreau144f84a2021-03-02 16:09:26 +01004546struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned int state)
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004547{
4548 struct h2s *h2s = ctx;
Willy Tarreau88bdba32019-05-13 18:17:53 +02004549 struct h2c *h2c = h2s->h2c;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004550
Willy Tarreau7838a792019-08-12 18:42:03 +02004551 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4552
Willy Tarreau5723f292020-01-10 15:16:57 +01004553 if (h2s->flags & H2_SF_NOTIFIED) {
4554 /* some data processing remains to be done first */
4555 goto end;
4556 }
4557
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004558 if (h2s->flags & H2_SF_WANT_SHUTW)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004559 h2_do_shutw(h2s);
4560
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004561 if (h2s->flags & H2_SF_WANT_SHUTR)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004562 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004563
Willy Tarreau88bdba32019-05-13 18:17:53 +02004564 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004565 /* We're done trying to send, remove ourself from the send_list */
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004566 LIST_DEL_INIT(&h2s->list);
Olivier Houchard7a977432019-03-21 15:47:13 +01004567
Willy Tarreau88bdba32019-05-13 18:17:53 +02004568 if (!h2s->cs) {
4569 h2s_destroy(h2s);
Willy Tarreau74163142021-03-13 11:30:19 +01004570 if (h2c_is_dead(h2c)) {
Willy Tarreau88bdba32019-05-13 18:17:53 +02004571 h2_release(h2c);
Willy Tarreau74163142021-03-13 11:30:19 +01004572 t = NULL;
4573 }
Willy Tarreau88bdba32019-05-13 18:17:53 +02004574 }
Olivier Houchard7a977432019-03-21 15:47:13 +01004575 }
Willy Tarreau5723f292020-01-10 15:16:57 +01004576 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02004577 TRACE_LEAVE(H2_EV_STRM_SHUT);
Willy Tarreau74163142021-03-13 11:30:19 +01004578 return t;
Willy Tarreau62f52692017-10-08 23:01:42 +02004579}
4580
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004581/* shutr() called by the conn_stream (mux_ops.shutr) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004582static void h2_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
4583{
4584 struct h2s *h2s = cs->ctx;
4585
Willy Tarreau7838a792019-08-12 18:42:03 +02004586 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004587 if (cs->flags & CS_FL_KILL_CONN)
4588 h2s->flags |= H2_SF_KILL_CONN;
4589
Willy Tarreau7838a792019-08-12 18:42:03 +02004590 if (mode)
4591 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004592
Willy Tarreau7838a792019-08-12 18:42:03 +02004593 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004594}
4595
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004596/* shutw() called by the conn_stream (mux_ops.shutw) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004597static void h2_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
4598{
4599 struct h2s *h2s = cs->ctx;
4600
Willy Tarreau7838a792019-08-12 18:42:03 +02004601 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004602 if (cs->flags & CS_FL_KILL_CONN)
4603 h2s->flags |= H2_SF_KILL_CONN;
4604
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004605 h2_do_shutw(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02004606 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004607}
4608
Christopher Faulet9b79a102019-07-15 11:22:56 +02004609/* Decode the payload of a HEADERS frame and produce the HTX request or response
4610 * depending on the connection's side. Returns a positive value on success, a
4611 * negative value on failure, or 0 if it couldn't proceed. May report connection
4612 * errors in h2c->errcode if the frame is non-decodable and the connection
4613 * unrecoverable. In absence of connection error when a failure is reported, the
4614 * caller must assume a stream error.
Willy Tarreauea18f862018-12-22 20:19:26 +01004615 *
4616 * The function may fold CONTINUATION frames into the initial HEADERS frame
4617 * by removing padding and next frame header, then moving the CONTINUATION
4618 * frame's payload and adjusting h2c->dfl to match the new aggregated frame,
4619 * leaving a hole between the main frame and the beginning of the next one.
4620 * The possibly remaining incomplete or next frame at the end may be moved
4621 * if the aggregated frame is not deleted, in order to fill the hole. Wrapped
4622 * HEADERS frames are unwrapped into a temporary buffer before decoding.
4623 *
4624 * A buffer at the beginning of processing may look like this :
4625 *
4626 * ,---.---------.-----.--------------.--------------.------.---.
4627 * |///| HEADERS | PAD | CONTINUATION | CONTINUATION | DATA |///|
4628 * `---^---------^-----^--------------^--------------^------^---'
4629 * | | <-----> | |
4630 * area | dpl | wrap
4631 * |<--------------> |
4632 * | dfl |
4633 * |<-------------------------------------------------->|
4634 * head data
4635 *
4636 * Padding is automatically overwritten when folding, participating to the
4637 * hole size after dfl :
4638 *
4639 * ,---.------------------------.-----.--------------.------.---.
4640 * |///| HEADERS : CONTINUATION |/////| CONTINUATION | DATA |///|
4641 * `---^------------------------^-----^--------------^------^---'
4642 * | | <-----> | |
4643 * area | hole | wrap
4644 * |<-----------------------> |
4645 * | dfl |
4646 * |<-------------------------------------------------->|
4647 * head data
4648 *
4649 * Please note that the HEADERS frame is always deprived from its PADLEN byte
4650 * however it may start with the 5 stream-dep+weight bytes in case of PRIORITY
4651 * bit.
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004652 *
4653 * The <flags> field must point to either the stream's flags or to a copy of it
4654 * so that the function can update the following flags :
4655 * - H2_SF_DATA_CLEN when content-length is seen
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004656 * - H2_SF_HEADERS_RCVD once the frame is successfully decoded
Willy Tarreau88d138e2019-01-02 19:38:14 +01004657 *
4658 * The H2_SF_HEADERS_RCVD flag is also looked at in the <flags> field prior to
4659 * decoding, in order to detect if we're dealing with a headers or a trailers
4660 * block (the trailers block appears after H2_SF_HEADERS_RCVD was seen).
Willy Tarreau13278b42017-10-13 19:23:14 +02004661 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01004662static 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 +02004663{
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004664 const uint8_t *hdrs = (uint8_t *)b_head(&h2c->dbuf);
Willy Tarreau83061a82018-07-13 11:56:34 +02004665 struct buffer *tmp = get_trash_chunk();
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004666 struct http_hdr list[global.tune.max_http_hdr * 2];
Willy Tarreau83061a82018-07-13 11:56:34 +02004667 struct buffer *copy = NULL;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004668 unsigned int msgf;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004669 struct htx *htx = NULL;
Willy Tarreauea18f862018-12-22 20:19:26 +01004670 int flen; // header frame len
4671 int hole = 0;
Willy Tarreau86277d42019-01-02 15:36:11 +01004672 int ret = 0;
4673 int outlen;
Willy Tarreau13278b42017-10-13 19:23:14 +02004674 int wrap;
Willy Tarreau13278b42017-10-13 19:23:14 +02004675
Willy Tarreau7838a792019-08-12 18:42:03 +02004676 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
4677
Willy Tarreauea18f862018-12-22 20:19:26 +01004678next_frame:
4679 if (b_data(&h2c->dbuf) - hole < h2c->dfl)
4680 goto leave; // incomplete input frame
4681
4682 /* No END_HEADERS means there's one or more CONTINUATION frames. In
4683 * this case, we'll try to paste it immediately after the initial
4684 * HEADERS frame payload and kill any possible padding. The initial
4685 * frame's length will be increased to represent the concatenation
4686 * of the two frames. The next frame is read from position <tlen>
4687 * and written at position <flen> (minus padding if some is present).
4688 */
4689 if (unlikely(!(h2c->dff & H2_F_HEADERS_END_HEADERS))) {
4690 struct h2_fh hdr;
4691 int clen; // CONTINUATION frame's payload length
4692
Willy Tarreau7838a792019-08-12 18:42:03 +02004693 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 +01004694 if (!h2_peek_frame_hdr(&h2c->dbuf, h2c->dfl + hole, &hdr)) {
4695 /* no more data, the buffer may be full, either due to
4696 * too large a frame or because of too large a hole that
4697 * we're going to compact at the end.
4698 */
4699 goto leave;
4700 }
4701
4702 if (hdr.ft != H2_FT_CONTINUATION) {
4703 /* RFC7540#6.10: frame of unexpected type */
Willy Tarreau7838a792019-08-12 18:42:03 +02004704 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 +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 (hdr.sid != h2c->dsi) {
4711 /* RFC7540#6.10: frame of different stream */
Willy Tarreau7838a792019-08-12 18:42:03 +02004712 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 +01004713 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004714 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreauea18f862018-12-22 20:19:26 +01004715 goto fail;
4716 }
4717
4718 if ((unsigned)hdr.len > (unsigned)global.tune.bufsize) {
4719 /* RFC7540#4.2: invalid frame length */
Willy Tarreau7838a792019-08-12 18:42:03 +02004720 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 +01004721 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4722 goto fail;
4723 }
4724
4725 /* detect when we must stop aggragating frames */
4726 h2c->dff |= hdr.ff & H2_F_HEADERS_END_HEADERS;
4727
4728 /* Take as much as we can of the CONTINUATION frame's payload */
4729 clen = b_data(&h2c->dbuf) - (h2c->dfl + hole + 9);
4730 if (clen > hdr.len)
4731 clen = hdr.len;
4732
4733 /* Move the frame's payload over the padding, hole and frame
4734 * header. At least one of hole or dpl is null (see diagrams
4735 * above). The hole moves after the new aggragated frame.
4736 */
4737 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 +02004738 h2c->dfl += hdr.len - h2c->dpl;
Willy Tarreauea18f862018-12-22 20:19:26 +01004739 hole += h2c->dpl + 9;
4740 h2c->dpl = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004741 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 +01004742 goto next_frame;
4743 }
4744
4745 flen = h2c->dfl - h2c->dpl;
Willy Tarreau68472622017-12-11 18:36:37 +01004746
Willy Tarreau13278b42017-10-13 19:23:14 +02004747 /* if the input buffer wraps, take a temporary copy of it (rare) */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004748 wrap = b_wrap(&h2c->dbuf) - b_head(&h2c->dbuf);
Willy Tarreau13278b42017-10-13 19:23:14 +02004749 if (wrap < h2c->dfl) {
Willy Tarreau68dd9852017-07-03 14:44:26 +02004750 copy = alloc_trash_chunk();
4751 if (!copy) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004752 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 +02004753 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
4754 goto fail;
4755 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004756 memcpy(copy->area, b_head(&h2c->dbuf), wrap);
4757 memcpy(copy->area + wrap, b_orig(&h2c->dbuf), h2c->dfl - wrap);
4758 hdrs = (uint8_t *) copy->area;
Willy Tarreau13278b42017-10-13 19:23:14 +02004759 }
4760
Willy Tarreau13278b42017-10-13 19:23:14 +02004761 /* Skip StreamDep and weight for now (we don't support PRIORITY) */
4762 if (h2c->dff & H2_F_HEADERS_PRIORITY) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004763 if (read_n32(hdrs) == h2c->dsi) {
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004764 /* RFC7540#5.3.1 : stream dep may not depend on itself */
Willy Tarreau7838a792019-08-12 18:42:03 +02004765 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 +01004766 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004767 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreaua0d11b62018-09-05 18:30:05 +02004768 goto fail;
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004769 }
4770
Willy Tarreaua01f45e2018-12-31 07:41:24 +01004771 if (flen < 5) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004772 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 +01004773 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4774 goto fail;
4775 }
4776
Willy Tarreau13278b42017-10-13 19:23:14 +02004777 hdrs += 5; // stream dep = 4, weight = 1
4778 flen -= 5;
4779 }
4780
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004781 if (!h2_get_buf(h2c, rxbuf)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004782 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 +01004783 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau86277d42019-01-02 15:36:11 +01004784 goto leave;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004785 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004786
Willy Tarreau937f7602018-02-26 15:22:17 +01004787 /* we can't retry a failed decompression operation so we must be very
4788 * careful not to take any risks. In practice the output buffer is
4789 * always empty except maybe for trailers, in which case we simply have
4790 * to wait for the upper layer to finish consuming what is available.
4791 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004792 htx = htx_from_buf(rxbuf);
4793 if (!htx_is_empty(htx)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004794 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 +02004795 h2c->flags |= H2_CF_DEM_SFULL;
4796 goto leave;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004797 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004798
Willy Tarreau25919232019-01-03 14:48:18 +01004799 /* past this point we cannot roll back in case of error */
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004800 outlen = hpack_decode_frame(h2c->ddht, hdrs, flen, list,
4801 sizeof(list)/sizeof(list[0]), tmp);
4802 if (outlen < 0) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004803 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 +01004804 h2c_error(h2c, H2_ERR_COMPRESSION_ERROR);
4805 goto fail;
4806 }
4807
Willy Tarreau25919232019-01-03 14:48:18 +01004808 /* The PACK decompressor was updated, let's update the input buffer and
4809 * the parser's state to commit these changes and allow us to later
4810 * fail solely on the stream if needed.
4811 */
4812 b_del(&h2c->dbuf, h2c->dfl + hole);
4813 h2c->dfl = hole = 0;
4814 h2c->st0 = H2_CS_FRAME_H;
4815
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004816 /* OK now we have our header list in <list> */
Willy Tarreau880f5802019-01-03 08:10:14 +01004817 msgf = (h2c->dff & H2_F_HEADERS_END_STREAM) ? 0 : H2_MSGF_BODY;
Christopher Fauletd0db4232021-01-22 11:46:30 +01004818 msgf |= (*flags & H2_SF_BODY_TUNNEL) ? H2_MSGF_BODY_TUNNEL: 0;
Amaury Denoyelle74162742020-12-11 17:53:05 +01004819 /* If an Extended CONNECT has been sent on this stream, set message flag
Ilya Shipitsinacf84592021-02-06 22:29:08 +05004820 * to convert 200 response to 101 htx response */
Amaury Denoyelle74162742020-12-11 17:53:05 +01004821 msgf |= (*flags & H2_SF_EXT_CONNECT_SENT) ? H2_MSGF_EXT_CONNECT: 0;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004822
Willy Tarreau88d138e2019-01-02 19:38:14 +01004823 if (*flags & H2_SF_HEADERS_RCVD)
4824 goto trailers;
4825
4826 /* This is the first HEADERS frame so it's a headers block */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004827 if (h2c->flags & H2_CF_IS_BACK)
Amaury Denoyelle74162742020-12-11 17:53:05 +01004828 outlen = h2_make_htx_response(list, htx, &msgf, body_len, upgrade_protocol);
Christopher Faulet9b79a102019-07-15 11:22:56 +02004829 else
4830 outlen = h2_make_htx_request(list, htx, &msgf, body_len);
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004831
Christopher Faulet3d875582021-04-26 17:46:13 +02004832 if (outlen < 0 || htx_free_space(htx) < global.tune.maxrewrite) {
Willy Tarreau25919232019-01-03 14:48:18 +01004833 /* too large headers? this is a stream error only */
Christopher Faulet3d875582021-04-26 17:46:13 +02004834 TRACE_STATE("message headers too large", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2S_ERR|H2_EV_PROTO_ERR, h2c->conn);
4835 htx->flags |= HTX_FL_PARSING_ERROR;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004836 goto fail;
4837 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004838
Willy Tarreau174b06a2018-04-25 18:13:58 +02004839 if (msgf & H2_MSGF_BODY) {
4840 /* a payload is present */
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004841 if (msgf & H2_MSGF_BODY_CL) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004842 *flags |= H2_SF_DATA_CLEN;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004843 htx->extra = *body_len;
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004844 }
Willy Tarreau174b06a2018-04-25 18:13:58 +02004845 }
Christopher Faulet7d247f02020-12-02 14:26:36 +01004846 if (msgf & H2_MSGF_BODYLESS_RSP)
4847 *flags |= H2_SF_BODYLESS_RESP;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004848
Christopher Fauletd0db4232021-01-22 11:46:30 +01004849 if (msgf & H2_MSGF_BODY_TUNNEL)
4850 *flags |= H2_SF_BODY_TUNNEL;
4851 else {
4852 /* Abort the tunnel attempt, if any */
4853 if (*flags & H2_SF_BODY_TUNNEL)
4854 *flags |= H2_SF_TUNNEL_ABRT;
4855 *flags &= ~H2_SF_BODY_TUNNEL;
4856 }
4857
Willy Tarreau88d138e2019-01-02 19:38:14 +01004858 done:
Christopher Faulet0b465482019-02-19 15:14:23 +01004859 /* indicate that a HEADERS frame was received for this stream, except
4860 * for 1xx responses. For 1xx responses, another HEADERS frame is
4861 * expected.
4862 */
4863 if (!(msgf & H2_MSGF_RSP_1XX))
4864 *flags |= H2_SF_HEADERS_RCVD;
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004865
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004866 if (h2c->dff & H2_F_HEADERS_END_STREAM) {
4867 /* no more data are expected for this message */
4868 htx->flags |= HTX_FL_EOM;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004869 }
Willy Tarreau937f7602018-02-26 15:22:17 +01004870
Amaury Denoyelleefe22762020-12-11 17:53:08 +01004871 if (msgf & H2_MSGF_EXT_CONNECT)
4872 *flags |= H2_SF_EXT_CONNECT_RCVD;
4873
Willy Tarreau86277d42019-01-02 15:36:11 +01004874 /* success */
4875 ret = 1;
4876
Willy Tarreau68dd9852017-07-03 14:44:26 +02004877 leave:
Willy Tarreau86277d42019-01-02 15:36:11 +01004878 /* If there is a hole left and it's not at the end, we are forced to
Willy Tarreauea18f862018-12-22 20:19:26 +01004879 * move the remaining data over it.
4880 */
4881 if (hole) {
4882 if (b_data(&h2c->dbuf) > h2c->dfl + hole)
4883 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole),
4884 b_data(&h2c->dbuf) - (h2c->dfl + hole), -hole);
4885 b_sub(&h2c->dbuf, hole);
4886 }
4887
Christopher Faulet07f88d72021-04-21 10:39:53 +02004888 if (b_full(&h2c->dbuf) && h2c->dfl) {
Willy Tarreauea18f862018-12-22 20:19:26 +01004889 /* too large frames */
4890 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau86277d42019-01-02 15:36:11 +01004891 ret = -1;
Willy Tarreauea18f862018-12-22 20:19:26 +01004892 }
4893
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004894 if (htx)
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004895 htx_to_buf(htx, rxbuf);
Willy Tarreau68dd9852017-07-03 14:44:26 +02004896 free_trash_chunk(copy);
Willy Tarreau7838a792019-08-12 18:42:03 +02004897 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau86277d42019-01-02 15:36:11 +01004898 return ret;
4899
Willy Tarreau68dd9852017-07-03 14:44:26 +02004900 fail:
Willy Tarreau86277d42019-01-02 15:36:11 +01004901 ret = -1;
Willy Tarreau68dd9852017-07-03 14:44:26 +02004902 goto leave;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004903
4904 trailers:
4905 /* This is the last HEADERS frame hence a trailer */
Willy Tarreau88d138e2019-01-02 19:38:14 +01004906 if (!(h2c->dff & H2_F_HEADERS_END_STREAM)) {
4907 /* It's a trailer but it's missing ES flag */
Willy Tarreau7838a792019-08-12 18:42:03 +02004908 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 +01004909 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004910 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau88d138e2019-01-02 19:38:14 +01004911 goto fail;
4912 }
4913
Christopher Faulet9b79a102019-07-15 11:22:56 +02004914 /* Trailers terminate a DATA sequence */
Willy Tarreau7838a792019-08-12 18:42:03 +02004915 if (h2_make_htx_trailers(list, htx) <= 0) {
4916 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 +02004917 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004918 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01004919 goto done;
Willy Tarreau13278b42017-10-13 19:23:14 +02004920}
4921
Christopher Faulet9b79a102019-07-15 11:22:56 +02004922/* Transfer the payload of a DATA frame to the HTTP/1 side. The HTTP/2 frame
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004923 * parser state is automatically updated. Returns > 0 if it could completely
4924 * send the current frame, 0 if it couldn't complete, in which case
4925 * CS_FL_RCV_MORE must be checked to know if some data remain pending (an empty
4926 * DATA frame can return 0 as a valid result). Stream errors are reported in
4927 * h2s->errcode and connection errors in h2c->errcode. The caller must already
4928 * have checked the frame header and ensured that the frame was complete or the
4929 * buffer full. It changes the frame state to FRAME_A once done.
Willy Tarreau454f9052017-10-26 19:40:35 +02004930 */
Willy Tarreau454b57b2018-02-26 15:50:05 +01004931static int h2_frt_transfer_data(struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02004932{
4933 struct h2c *h2c = h2s->h2c;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004934 int block;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004935 unsigned int flen = 0;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004936 struct htx *htx = NULL;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004937 struct buffer *csbuf;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004938 unsigned int sent;
Willy Tarreau454f9052017-10-26 19:40:35 +02004939
Willy Tarreau7838a792019-08-12 18:42:03 +02004940 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
4941
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004942 h2c->flags &= ~H2_CF_DEM_SFULL;
Willy Tarreau454f9052017-10-26 19:40:35 +02004943
Olivier Houchard638b7992018-08-16 15:41:52 +02004944 csbuf = h2_get_buf(h2c, &h2s->rxbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004945 if (!csbuf) {
4946 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02004947 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 +01004948 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004949 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004950 htx = htx_from_buf(csbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004951
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004952try_again:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004953 flen = h2c->dfl - h2c->dpl;
4954 if (!flen)
Willy Tarreau4a28da12018-01-04 14:41:00 +01004955 goto end_transfer;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004956
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004957 if (flen > b_data(&h2c->dbuf)) {
4958 flen = b_data(&h2c->dbuf);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004959 if (!flen)
Willy Tarreau454b57b2018-02-26 15:50:05 +01004960 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004961 }
4962
Christopher Faulet9b79a102019-07-15 11:22:56 +02004963 block = htx_free_data_space(htx);
4964 if (!block) {
4965 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004966 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 +02004967 goto fail;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004968 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004969 if (flen > block)
4970 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004971
Christopher Faulet9b79a102019-07-15 11:22:56 +02004972 /* here, flen is the max we can copy into the output buffer */
4973 block = b_contig_data(&h2c->dbuf, 0);
4974 if (flen > block)
4975 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004976
Christopher Faulet9b79a102019-07-15 11:22:56 +02004977 sent = htx_add_data(htx, ist2(b_head(&h2c->dbuf), flen));
Willy Tarreau022e5e52020-09-10 09:33:15 +02004978 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 +02004979
Christopher Faulet9b79a102019-07-15 11:22:56 +02004980 b_del(&h2c->dbuf, sent);
4981 h2c->dfl -= sent;
4982 h2c->rcvd_c += sent;
4983 h2c->rcvd_s += sent; // warning, this can also affect the closed streams!
Willy Tarreau454f9052017-10-26 19:40:35 +02004984
Christopher Faulet9b79a102019-07-15 11:22:56 +02004985 if (h2s->flags & H2_SF_DATA_CLEN) {
4986 h2s->body_len -= sent;
4987 htx->extra = h2s->body_len;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004988 }
4989
Christopher Faulet9b79a102019-07-15 11:22:56 +02004990 if (sent < flen) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01004991 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004992 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 +01004993 goto fail;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004994 }
4995
Christopher Faulet9b79a102019-07-15 11:22:56 +02004996 goto try_again;
4997
Willy Tarreau4a28da12018-01-04 14:41:00 +01004998 end_transfer:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004999 /* here we're done with the frame, all the payload (except padding) was
5000 * transferred.
5001 */
Willy Tarreaueba10f22018-04-25 20:44:22 +02005002
Christopher Faulet5be651d2021-01-22 15:28:03 +01005003 if (!(h2s->flags & H2_SF_BODY_TUNNEL) && (h2c->dff & H2_F_DATA_END_STREAM)) {
5004 /* no more data are expected for this message. This add the EOM
5005 * flag but only on the response path or if no tunnel attempt
5006 * was aborted. Otherwise (request path + tunnel abrted), the
5007 * EOM was already reported.
5008 */
Christopher Faulet33724322021-02-10 09:04:59 +01005009 if ((h2c->flags & H2_CF_IS_BACK) || !(h2s->flags & H2_SF_TUNNEL_ABRT)) {
5010 /* If we receive an empty DATA frame with ES flag while the HTX
5011 * message is empty, we must be sure to push a block to be sure
5012 * the HTX EOM flag will be handled on the other side. It is a
5013 * workaround because for now it is not possible to push empty
5014 * HTX DATA block. And without this block, there is no way to
5015 * "commit" the end of the message.
5016 */
5017 if (htx_is_empty(htx)) {
5018 if (!htx_add_endof(htx, HTX_BLK_EOT))
5019 goto fail;
5020 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005021 htx->flags |= HTX_FL_EOM;
Christopher Faulet33724322021-02-10 09:04:59 +01005022 }
Willy Tarreaueba10f22018-04-25 20:44:22 +02005023 }
5024
Willy Tarreaud1023bb2018-03-22 16:53:12 +01005025 h2c->rcvd_c += h2c->dpl;
5026 h2c->rcvd_s += h2c->dpl;
5027 h2c->dpl = 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02005028 h2c->st0 = H2_CS_FRAME_A; // send the corresponding window update
Christopher Faulet9b79a102019-07-15 11:22:56 +02005029 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02005030 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005031 return 1;
Willy Tarreau454b57b2018-02-26 15:50:05 +01005032 fail:
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005033 if (htx)
5034 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02005035 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454b57b2018-02-26 15:50:05 +01005036 return 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02005037}
5038
Willy Tarreau115e83b2018-12-01 19:17:53 +01005039/* Try to send a HEADERS frame matching HTX response present in HTX message
5040 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
5041 * must check the stream's status to detect any error which might have happened
5042 * subsequently to a successful send. The htx blocks are automatically removed
5043 * from the message. The htx message is assumed to be valid since produced from
5044 * the internal code, hence it contains a start line, an optional series of
5045 * header blocks and an end of header, otherwise an invalid frame could be
5046 * emitted and the resulting htx message could be left in an inconsistent state.
5047 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005048static size_t h2s_frt_make_resp_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005049{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005050 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau115e83b2018-12-01 19:17:53 +01005051 struct h2c *h2c = h2s->h2c;
5052 struct htx_blk *blk;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005053 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005054 struct buffer *mbuf;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005055 struct htx_sl *sl;
5056 enum htx_blk_type type;
5057 int es_now = 0;
5058 int ret = 0;
5059 int hdr;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005060
Willy Tarreau7838a792019-08-12 18:42:03 +02005061 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5062
Willy Tarreau115e83b2018-12-01 19:17:53 +01005063 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005064 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005065 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005066 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005067 return 0;
5068 }
5069
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005070 /* get the start line (we do have one) and the rest of the headers,
5071 * that we dump starting at header 0 */
5072 sl = NULL;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005073 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005074 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau115e83b2018-12-01 19:17:53 +01005075 type = htx_get_blk_type(blk);
5076
5077 if (type == HTX_BLK_UNUSED)
5078 continue;
5079
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005080 if (type == HTX_BLK_EOH)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005081 break;
5082
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005083 if (type == HTX_BLK_HDR) {
Christopher Faulet56498132021-01-29 11:39:43 +01005084 BUG_ON(!sl); /* The start-line mut be defined before any headers */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005085 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5086 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5087 goto fail;
5088 }
5089
5090 list[hdr].n = htx_get_blk_name(htx, blk);
5091 list[hdr].v = htx_get_blk_value(htx, blk);
5092 hdr++;
5093 }
5094 else if (type == HTX_BLK_RES_SL) {
Christopher Faulet56498132021-01-29 11:39:43 +01005095 BUG_ON(sl); /* Only one start-line expected */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005096 sl = htx_get_blk_ptr(htx, blk);
5097 h2s->status = sl->info.res.status;
Christopher Faulet7d247f02020-12-02 14:26:36 +01005098 if (h2s->status == 204 || h2s->status == 304)
5099 h2s->flags |= H2_SF_BODYLESS_RESP;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005100 if (h2s->status < 100 || h2s->status > 999) {
5101 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5102 goto fail;
5103 }
5104 else if (h2s->status == 101) {
Amaury Denoyelleefe22762020-12-11 17:53:08 +01005105 if (unlikely(h2s->flags & H2_SF_EXT_CONNECT_RCVD)) {
5106 /* If an Extended CONNECT has been received, we need to convert 101 to 200 */
5107 h2s->status = 200;
5108 h2s->flags &= ~H2_SF_EXT_CONNECT_RCVD;
5109 }
5110 else {
5111 /* Otherwise, 101 responses are not supported in H2, so return a error (RFC7540#8.1.1) */
5112 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5113 goto fail;
5114 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005115 }
5116 else if ((h2s->flags & H2_SF_BODY_TUNNEL) && h2s->status >= 300) {
5117 /* Abort the tunnel attempt */
5118 h2s->flags &= ~H2_SF_BODY_TUNNEL;
5119 h2s->flags |= H2_SF_TUNNEL_ABRT;
5120 }
5121 }
5122 else {
5123 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 +01005124 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005125 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005126 }
5127
Christopher Faulet56498132021-01-29 11:39:43 +01005128 /* The start-line me be defined */
5129 BUG_ON(!sl);
5130
Willy Tarreau115e83b2018-12-01 19:17:53 +01005131 /* marker for end of headers */
5132 list[hdr].n = ist("");
5133
Willy Tarreau9c218e72019-05-26 10:08:28 +02005134 mbuf = br_tail(h2c->mbuf);
5135 retry:
5136 if (!h2_get_buf(h2c, mbuf)) {
5137 h2c->flags |= H2_CF_MUX_MALLOC;
5138 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005139 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 +02005140 return 0;
5141 }
5142
Willy Tarreau115e83b2018-12-01 19:17:53 +01005143 chunk_reset(&outbuf);
5144
5145 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005146 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5147 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005148 break;
5149 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005150 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau115e83b2018-12-01 19:17:53 +01005151 }
5152
5153 if (outbuf.size < 9)
5154 goto full;
5155
5156 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5157 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5158 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5159 outbuf.data = 9;
5160
Willy Tarreau8a4dca02022-01-13 16:00:12 +01005161 if ((h2c->flags & (H2_CF_SHTS_UPDATED|H2_CF_DTSU_EMITTED)) == H2_CF_SHTS_UPDATED) {
5162 /* SETTINGS_HEADER_TABLE_SIZE changed, we must send an HPACK
5163 * dynamic table size update so that some clients are not
5164 * confused. In practice we only need to send the DTSU when the
5165 * advertised size is lower than the current one, and since we
5166 * don't use it and don't care about the default 4096 bytes,
5167 * we only ack it with a zero size thus we at most have to deal
5168 * with this once. See RFC7541#4.2 and #6.3 for the spec, and
5169 * below for the whole context and interoperability risks:
5170 * https://lists.w3.org/Archives/Public/ietf-http-wg/2021OctDec/0235.html
5171 */
5172 if (b_room(&outbuf) < 1)
5173 goto full;
5174 outbuf.area[outbuf.data++] = 0x20; // HPACK DTSU 0 bytes
5175
5176 /* let's not update the flags now but only once the buffer is
5177 * really committed.
5178 */
5179 }
5180
Willy Tarreau115e83b2018-12-01 19:17:53 +01005181 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01005182 if (!hpack_encode_int_status(&outbuf, h2s->status)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005183 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005184 goto realign_again;
5185 goto full;
5186 }
5187
5188 /* encode all headers, stop at empty name */
5189 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
5190 /* these ones do not exist in H2 and must be dropped. */
5191 if (isteq(list[hdr].n, ist("connection")) ||
5192 isteq(list[hdr].n, ist("proxy-connection")) ||
5193 isteq(list[hdr].n, ist("keep-alive")) ||
5194 isteq(list[hdr].n, ist("upgrade")) ||
5195 isteq(list[hdr].n, ist("transfer-encoding")))
5196 continue;
5197
Christopher Faulet86d144c2019-08-14 16:32:25 +02005198 /* Skip all pseudo-headers */
5199 if (*(list[hdr].n.ptr) == ':')
5200 continue;
5201
Willy Tarreau115e83b2018-12-01 19:17:53 +01005202 if (isteq(list[hdr].n, ist("")))
5203 break; // end
5204
5205 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
5206 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005207 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005208 goto realign_again;
5209 goto full;
5210 }
5211 }
5212
Willy Tarreaucb985a42019-10-07 16:56:34 +02005213 /* update the frame's size */
5214 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5215
5216 if (outbuf.data > h2c->mfs + 9) {
5217 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5218 /* output full */
5219 if (b_space_wraps(mbuf))
5220 goto realign_again;
5221 goto full;
5222 }
5223 }
5224
Willy Tarreau38b5bec2021-06-17 08:40:04 +02005225 TRACE_USER("sent H2 response ", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
5226
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005227 /* remove all header blocks including the EOH and compute the
5228 * corresponding size.
Willy Tarreau115e83b2018-12-01 19:17:53 +01005229 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005230 ret = 0;
5231 blk = htx_get_head_blk(htx);
5232 while (blk) {
5233 type = htx_get_blk_type(blk);
5234 ret += htx_get_blksz(blk);
5235 blk = htx_remove_blk(htx, blk);
5236 /* The removed block is the EOH */
5237 if (type == HTX_BLK_EOH)
5238 break;
Christopher Faulet5be651d2021-01-22 15:28:03 +01005239 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005240
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005241 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW) {
5242 /* Response already closed: add END_STREAM */
5243 es_now = 1;
5244 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005245 else if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx) && h2s->status >= 200) {
5246 /* EOM+empty: we may need to add END_STREAM except for 1xx
Christopher Faulet991febd2020-12-02 15:17:31 +01005247 * responses and tunneled response.
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005248 */
Christopher Faulet991febd2020-12-02 15:17:31 +01005249 if (!(h2s->flags & H2_SF_BODY_TUNNEL) || h2s->status >= 300)
5250 es_now = 1;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005251 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005252
Willy Tarreau115e83b2018-12-01 19:17:53 +01005253 if (es_now)
5254 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5255
5256 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005257 b_add(mbuf, outbuf.data);
Christopher Faulet0b465482019-02-19 15:14:23 +01005258
5259 /* indicates the HEADERS frame was sent, except for 1xx responses. For
5260 * 1xx responses, another HEADERS frame is expected.
5261 */
Christopher Faulet89899422020-12-07 18:24:43 +01005262 if (h2s->status >= 200)
Christopher Faulet0b465482019-02-19 15:14:23 +01005263 h2s->flags |= H2_SF_HEADERS_SENT;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005264
Willy Tarreau8a4dca02022-01-13 16:00:12 +01005265 if (h2c->flags & H2_CF_SHTS_UPDATED) {
5266 /* was sent above */
5267 h2c->flags |= H2_CF_DTSU_EMITTED;
Willy Tarreaub05f4dd2022-02-16 14:28:14 +01005268 h2c->flags &= ~H2_CF_SHTS_UPDATED;
Willy Tarreau8a4dca02022-01-13 16:00:12 +01005269 }
5270
Willy Tarreau115e83b2018-12-01 19:17:53 +01005271 if (es_now) {
5272 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005273 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 +01005274 if (h2s->st == H2_SS_OPEN)
5275 h2s->st = H2_SS_HLOC;
5276 else
5277 h2s_close(h2s);
5278 }
5279
5280 /* OK we could properly deliver the response */
Willy Tarreau115e83b2018-12-01 19:17:53 +01005281 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005282 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005283 return ret;
5284 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005285 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5286 goto retry;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005287 h2c->flags |= H2_CF_MUX_MFULL;
5288 h2s->flags |= H2_SF_BLK_MROOM;
5289 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005290 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 +01005291 goto end;
5292 fail:
5293 /* unparsable HTX messages, too large ones to be produced in the local
5294 * list etc go here (unrecoverable errors).
5295 */
5296 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5297 ret = 0;
5298 goto end;
5299}
5300
Willy Tarreau80739692018-10-05 11:35:57 +02005301/* Try to send a HEADERS frame matching HTX request present in HTX message
5302 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
5303 * must check the stream's status to detect any error which might have happened
5304 * subsequently to a successful send. The htx blocks are automatically removed
5305 * from the message. The htx message is assumed to be valid since produced from
5306 * the internal code, hence it contains a start line, an optional series of
5307 * header blocks and an end of header, otherwise an invalid frame could be
5308 * emitted and the resulting htx message could be left in an inconsistent state.
5309 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005310static size_t h2s_bck_make_req_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau80739692018-10-05 11:35:57 +02005311{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005312 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau80739692018-10-05 11:35:57 +02005313 struct h2c *h2c = h2s->h2c;
5314 struct htx_blk *blk;
Willy Tarreau80739692018-10-05 11:35:57 +02005315 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005316 struct buffer *mbuf;
Willy Tarreau80739692018-10-05 11:35:57 +02005317 struct htx_sl *sl;
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005318 struct ist meth, uri, auth, host = IST_NULL;
Willy Tarreau80739692018-10-05 11:35:57 +02005319 enum htx_blk_type type;
5320 int es_now = 0;
5321 int ret = 0;
5322 int hdr;
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005323 int extended_connect = 0;
Willy Tarreau80739692018-10-05 11:35:57 +02005324
Willy Tarreau7838a792019-08-12 18:42:03 +02005325 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5326
Willy Tarreau80739692018-10-05 11:35:57 +02005327 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005328 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02005329 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005330 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02005331 return 0;
5332 }
5333
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005334 /* get the start line (we do have one) and the rest of the headers,
5335 * that we dump starting at header 0 */
5336 sl = NULL;
Willy Tarreau80739692018-10-05 11:35:57 +02005337 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005338 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005339 type = htx_get_blk_type(blk);
5340
5341 if (type == HTX_BLK_UNUSED)
5342 continue;
5343
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005344 if (type == HTX_BLK_EOH)
Willy Tarreau80739692018-10-05 11:35:57 +02005345 break;
5346
Christopher Fauletc29b4bf2021-01-29 11:49:16 +01005347 if (type == HTX_BLK_HDR) {
Christopher Faulet56498132021-01-29 11:39:43 +01005348 BUG_ON(!sl); /* The start-line mut be defined before any headers */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005349 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5350 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5351 goto fail;
5352 }
Willy Tarreau80739692018-10-05 11:35:57 +02005353
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005354 list[hdr].n = htx_get_blk_name(htx, blk);
5355 list[hdr].v = htx_get_blk_value(htx, blk);
Christopher Faulet67d58092019-10-02 10:51:38 +02005356
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005357 /* Skip header if same name is used to add the server name */
5358 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name &&
5359 isteq(list[hdr].n, ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len)))
5360 continue;
Christopher Faulet67d58092019-10-02 10:51:38 +02005361
Ilya Shipitsinacf84592021-02-06 22:29:08 +05005362 /* Convert connection: upgrade to Extended connect from rfc 8441 */
Christopher Faulet673504a2021-09-09 09:52:51 +02005363 if ((sl->flags & HTX_SL_F_CONN_UPG) && isteqi(list[hdr].n, ist("connection"))) {
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005364 /* rfc 7230 #6.1 Connection = list of tokens */
5365 struct ist connection_ist = list[hdr].v;
5366 do {
5367 if (isteqi(iststop(connection_ist, ','),
5368 ist("upgrade"))) {
Amaury Denoyelle68993a12021-10-18 09:43:29 +02005369 if (!(h2c->flags & H2_CF_RCVD_RFC8441)) {
5370 TRACE_STATE("reject upgrade because of no RFC8441 support", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5371 goto fail;
5372 }
5373
Amaury Denoyellea1fa1542021-10-18 10:05:16 +02005374 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 +01005375 h2s->flags |= (H2_SF_BODY_TUNNEL|H2_SF_EXT_CONNECT_SENT);
5376 sl->info.req.meth = HTTP_METH_CONNECT;
5377 meth = ist("CONNECT");
5378
5379 extended_connect = 1;
5380 break;
5381 }
5382
5383 connection_ist = istadv(istfind(connection_ist, ','), 1);
5384 } while (istlen(connection_ist));
5385 }
5386
Christopher Faulet673504a2021-09-09 09:52:51 +02005387 if ((sl->flags & HTX_SL_F_CONN_UPG) && isteq(list[hdr].n, ist("upgrade"))) {
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005388 /* rfc 7230 #6.7 Upgrade = list of protocols
5389 * rfc 8441 #4 Extended connect = :protocol is single-valued
5390 *
5391 * only first HTTP/1 protocol is preserved
5392 */
5393 const struct ist protocol = iststop(list[hdr].v, ',');
5394 /* upgrade_protocol field is 16 bytes long in h2s */
5395 istpad(h2s->upgrade_protocol, isttrim(protocol, 15));
5396 }
5397
5398 if (isteq(list[hdr].n, ist("host")))
5399 host = list[hdr].v;
5400
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005401 hdr++;
5402 }
Christopher Fauletc29b4bf2021-01-29 11:49:16 +01005403 else if (type == HTX_BLK_REQ_SL) {
5404 BUG_ON(sl); /* Only one start-line expected */
5405 sl = htx_get_blk_ptr(htx, blk);
5406 meth = htx_sl_req_meth(sl);
5407 uri = htx_sl_req_uri(sl);
5408 if (sl->info.req.meth == HTTP_METH_HEAD)
5409 h2s->flags |= H2_SF_BODYLESS_RESP;
5410 if (unlikely(uri.len == 0)) {
5411 TRACE_ERROR("no URI in HTX request", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5412 goto fail;
5413 }
5414 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005415 else {
5416 TRACE_ERROR("will not encode unexpected htx block", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5417 goto fail;
5418 }
Willy Tarreau80739692018-10-05 11:35:57 +02005419 }
5420
Christopher Faulet56498132021-01-29 11:39:43 +01005421 /* The start-line me be defined */
5422 BUG_ON(!sl);
5423
Christopher Faulet72ba6cd2019-09-24 16:20:05 +02005424 /* Now add the server name to a header (if requested) */
5425 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name) {
5426 struct server *srv = objt_server(h2c->conn->target);
5427
5428 if (srv) {
5429 list[hdr].n = ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len);
5430 list[hdr].v = ist(srv->id);
5431 hdr++;
5432 }
5433 }
5434
Willy Tarreau80739692018-10-05 11:35:57 +02005435 /* marker for end of headers */
5436 list[hdr].n = ist("");
5437
Willy Tarreau9c218e72019-05-26 10:08:28 +02005438 mbuf = br_tail(h2c->mbuf);
5439 retry:
5440 if (!h2_get_buf(h2c, mbuf)) {
5441 h2c->flags |= H2_CF_MUX_MALLOC;
5442 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005443 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 +02005444 return 0;
5445 }
5446
Willy Tarreau80739692018-10-05 11:35:57 +02005447 chunk_reset(&outbuf);
5448
5449 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005450 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5451 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005452 break;
5453 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005454 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau80739692018-10-05 11:35:57 +02005455 }
5456
5457 if (outbuf.size < 9)
5458 goto full;
5459
5460 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5461 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5462 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5463 outbuf.data = 9;
5464
5465 /* encode the method, which necessarily is the first one */
Willy Tarreaubdabc3a2018-12-10 18:25:11 +01005466 if (!hpack_encode_method(&outbuf, sl->info.req.meth, meth)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005467 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005468 goto realign_again;
5469 goto full;
5470 }
5471
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005472 auth = ist(NULL);
5473
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005474 /* RFC7540 #8.3: the CONNECT method must have :
5475 * - :authority set to the URI part (host:port)
5476 * - :method set to CONNECT
5477 * - :scheme and :path omitted
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005478 *
5479 * Note that this is not applicable in case of the Extended CONNECT
5480 * protocol from rfc 8441.
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005481 */
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005482 if (unlikely(sl->info.req.meth == HTTP_METH_CONNECT) && !extended_connect) {
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005483 auth = uri;
5484
5485 if (!hpack_encode_header(&outbuf, ist(":authority"), auth)) {
5486 /* output full */
5487 if (b_space_wraps(mbuf))
5488 goto realign_again;
5489 goto full;
5490 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005491 h2s->flags |= H2_SF_BODY_TUNNEL;
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005492 } else {
5493 /* other methods need a :scheme. If an authority is known from
5494 * the request line, it must be sent, otherwise only host is
5495 * sent. Host is never sent as the authority.
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005496 *
5497 * This code is also applicable for Extended CONNECT protocol
5498 * from rfc 8441.
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005499 */
5500 struct ist scheme = { };
Christopher Faulet3b44c542019-06-14 10:46:51 +02005501
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005502 if (uri.ptr[0] != '/' && uri.ptr[0] != '*') {
5503 /* the URI seems to start with a scheme */
5504 int len = 1;
5505
5506 while (len < uri.len && uri.ptr[len] != ':')
5507 len++;
5508
5509 if (len + 2 < uri.len && uri.ptr[len + 1] == '/' && uri.ptr[len + 2] == '/') {
5510 /* make the uri start at the authority now */
Tim Duesterhus9f75ed12021-03-02 18:57:26 +01005511 scheme = ist2(uri.ptr, len);
Tim Duesterhus154374c2021-03-02 18:57:27 +01005512 uri = istadv(uri, len + 3);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005513
5514 /* find the auth part of the URI */
Tim Duesterhus92c696e2021-02-28 16:11:36 +01005515 auth = ist2(uri.ptr, 0);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005516 while (auth.len < uri.len && auth.ptr[auth.len] != '/')
5517 auth.len++;
5518
Tim Duesterhus154374c2021-03-02 18:57:27 +01005519 uri = istadv(uri, auth.len);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005520 }
5521 }
5522
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005523 /* For Extended CONNECT, the :authority must be present.
5524 * Use host value for it.
5525 */
5526 if (unlikely(extended_connect) && isttest(host))
5527 auth = host;
5528
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005529 if (!scheme.len) {
5530 /* no explicit scheme, we're using an origin-form URI,
5531 * probably from an H1 request transcoded to H2 via an
5532 * external layer, then received as H2 without authority.
5533 * So we have to look up the scheme from the HTX flags.
5534 * In such a case only http and https are possible, and
5535 * https is the default (sent by browsers).
5536 */
5537 if ((sl->flags & (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP)) == (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP))
5538 scheme = ist("http");
5539 else
5540 scheme = ist("https");
5541 }
Christopher Faulet3b44c542019-06-14 10:46:51 +02005542
5543 if (!hpack_encode_scheme(&outbuf, scheme)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005544 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005545 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005546 goto realign_again;
5547 goto full;
5548 }
Willy Tarreau80739692018-10-05 11:35:57 +02005549
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005550 if (auth.len && !hpack_encode_header(&outbuf, ist(":authority"), auth)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005551 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005552 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005553 goto realign_again;
5554 goto full;
5555 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005556
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005557 /* encode the path. RFC7540#8.1.2.3: if path is empty it must
5558 * be sent as '/' or '*'.
5559 */
5560 if (unlikely(!uri.len)) {
5561 if (sl->info.req.meth == HTTP_METH_OPTIONS)
5562 uri = ist("*");
5563 else
5564 uri = ist("/");
Willy Tarreau053c1572019-02-01 16:13:59 +01005565 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005566
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005567 if (!hpack_encode_path(&outbuf, uri)) {
5568 /* output full */
5569 if (b_space_wraps(mbuf))
5570 goto realign_again;
5571 goto full;
5572 }
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005573
5574 /* encode the pseudo-header protocol from rfc8441 if using
5575 * Extended CONNECT method.
5576 */
5577 if (unlikely(extended_connect)) {
5578 const struct ist protocol = ist(h2s->upgrade_protocol);
5579 if (isttest(protocol)) {
5580 if (!hpack_encode_header(&outbuf,
5581 ist(":protocol"),
5582 protocol)) {
5583 /* output full */
5584 if (b_space_wraps(mbuf))
5585 goto realign_again;
5586 goto full;
5587 }
5588 }
5589 }
Willy Tarreau80739692018-10-05 11:35:57 +02005590 }
5591
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005592 /* encode all headers, stop at empty name. Host is only sent if we
5593 * do not provide an authority.
5594 */
Willy Tarreau80739692018-10-05 11:35:57 +02005595 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005596 struct ist n = list[hdr].n;
5597 struct ist v = list[hdr].v;
5598
Willy Tarreau80739692018-10-05 11:35:57 +02005599 /* these ones do not exist in H2 and must be dropped. */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005600 if (isteq(n, ist("connection")) ||
5601 (auth.len && isteq(n, ist("host"))) ||
5602 isteq(n, ist("proxy-connection")) ||
5603 isteq(n, ist("keep-alive")) ||
5604 isteq(n, ist("upgrade")) ||
5605 isteq(n, ist("transfer-encoding")))
Willy Tarreau80739692018-10-05 11:35:57 +02005606 continue;
5607
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005608 if (isteq(n, ist("te"))) {
5609 /* "te" may only be sent with "trailers" if this value
5610 * is present, otherwise it must be deleted.
5611 */
5612 v = istist(v, ist("trailers"));
Tim Duesterhus7b5777d2021-03-02 18:57:28 +01005613 if (!isttest(v) || (v.len > 8 && v.ptr[8] != ','))
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005614 continue;
5615 v = ist("trailers");
5616 }
5617
Christopher Faulet86d144c2019-08-14 16:32:25 +02005618 /* Skip all pseudo-headers */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005619 if (*(n.ptr) == ':')
Christopher Faulet86d144c2019-08-14 16:32:25 +02005620 continue;
5621
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005622 if (isteq(n, ist("")))
Willy Tarreau80739692018-10-05 11:35:57 +02005623 break; // end
5624
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005625 if (!hpack_encode_header(&outbuf, n, v)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005626 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005627 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005628 goto realign_again;
5629 goto full;
5630 }
5631 }
5632
Willy Tarreaucb985a42019-10-07 16:56:34 +02005633 /* update the frame's size */
5634 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5635
5636 if (outbuf.data > h2c->mfs + 9) {
5637 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5638 /* output full */
5639 if (b_space_wraps(mbuf))
5640 goto realign_again;
5641 goto full;
5642 }
5643 }
5644
Willy Tarreau38b5bec2021-06-17 08:40:04 +02005645 TRACE_USER("sent H2 request ", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
5646
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005647 /* remove all header blocks including the EOH and compute the
5648 * corresponding size.
Willy Tarreau80739692018-10-05 11:35:57 +02005649 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005650 ret = 0;
5651 blk = htx_get_head_blk(htx);
5652 while (blk) {
5653 type = htx_get_blk_type(blk);
5654 ret += htx_get_blksz(blk);
5655 blk = htx_remove_blk(htx, blk);
5656 /* The removed block is the EOH */
5657 if (type == HTX_BLK_EOH)
5658 break;
Christopher Fauletd0db4232021-01-22 11:46:30 +01005659 }
Willy Tarreau80739692018-10-05 11:35:57 +02005660
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005661 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW) {
5662 /* Request already closed: add END_STREAM */
Willy Tarreau80739692018-10-05 11:35:57 +02005663 es_now = 1;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005664 }
5665 if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx)) {
5666 /* EOM+empty: we may need to add END_STREAM (except for CONNECT
5667 * request)
5668 */
5669 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5670 es_now = 1;
5671 }
Willy Tarreau80739692018-10-05 11:35:57 +02005672
Willy Tarreau80739692018-10-05 11:35:57 +02005673 if (es_now)
5674 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5675
5676 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005677 b_add(mbuf, outbuf.data);
Willy Tarreau80739692018-10-05 11:35:57 +02005678 h2s->flags |= H2_SF_HEADERS_SENT;
5679 h2s->st = H2_SS_OPEN;
5680
Willy Tarreau80739692018-10-05 11:35:57 +02005681 if (es_now) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005682 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 +02005683 // trim any possibly pending data (eg: inconsistent content-length)
5684 h2s->flags |= H2_SF_ES_SENT;
5685 h2s->st = H2_SS_HLOC;
5686 }
5687
Willy Tarreau80739692018-10-05 11:35:57 +02005688 end:
5689 return ret;
5690 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005691 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5692 goto retry;
Willy Tarreau80739692018-10-05 11:35:57 +02005693 h2c->flags |= H2_CF_MUX_MFULL;
5694 h2s->flags |= H2_SF_BLK_MROOM;
5695 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005696 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 +02005697 goto end;
5698 fail:
5699 /* unparsable HTX messages, too large ones to be produced in the local
5700 * list etc go here (unrecoverable errors).
5701 */
5702 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5703 ret = 0;
5704 goto end;
5705}
5706
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005707/* Try to send a DATA frame matching HTTP response present in HTX structure
Willy Tarreau98de12a2018-12-12 07:03:00 +01005708 * present in <buf>, for stream <h2s>. Returns the number of bytes sent. The
5709 * caller must check the stream's status to detect any error which might have
5710 * happened subsequently to a successful send. Returns the number of data bytes
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005711 * consumed, or zero if nothing done.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005712 */
Christopher Faulet142854b2020-12-02 15:12:40 +01005713static size_t h2s_make_data(struct h2s *h2s, struct buffer *buf, size_t count)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005714{
5715 struct h2c *h2c = h2s->h2c;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005716 struct htx *htx;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005717 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005718 struct buffer *mbuf;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005719 size_t total = 0;
5720 int es_now = 0;
5721 int bsize; /* htx block size */
5722 int fsize; /* h2 frame size */
5723 struct htx_blk *blk;
5724 enum htx_blk_type type;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005725 int trunc_out; /* non-zero if truncated on out buf */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005726
Willy Tarreau7838a792019-08-12 18:42:03 +02005727 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5728
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005729 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005730 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005731 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005732 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005733 goto end;
5734 }
5735
Willy Tarreau98de12a2018-12-12 07:03:00 +01005736 htx = htx_from_buf(buf);
5737
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005738 /* We only come here with HTX_BLK_DATA blocks */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005739
5740 new_frame:
Willy Tarreauee573762018-12-04 15:25:57 +01005741 if (!count || htx_is_empty(htx))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005742 goto end;
5743
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005744 if ((h2c->flags & H2_CF_IS_BACK) &&
Christopher Fauletf95f8762021-01-22 11:59:07 +01005745 (h2s->flags & (H2_SF_HEADERS_RCVD|H2_SF_BODY_TUNNEL)) == H2_SF_BODY_TUNNEL) {
5746 /* The response HEADERS frame not received yet. Thus the tunnel
5747 * is not fully established yet. In this situation, we block
5748 * data sending.
5749 */
5750 h2s->flags |= H2_SF_BLK_MBUSY;
5751 TRACE_STATE("Request DATA frame blocked waiting for tunnel establishment", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5752 goto end;
5753 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01005754 else if ((h2c->flags & H2_CF_IS_BACK) && (h2s->flags & H2_SF_TUNNEL_ABRT)) {
5755 /* a tunnel attempt was aborted but the is pending raw data to xfer to the server.
5756 * Thus the stream is closed with the CANCEL error. The error will be reported to
5757 * the upper layer as aserver abort. But at this stage there is nothing more we can
5758 * do. We just wait for the end of the response to be sure to not truncate it.
5759 */
5760 if (!(h2s->flags & H2_SF_ES_RCVD)) {
5761 TRACE_STATE("Request DATA frame blocked waiting end of aborted tunnel", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5762 h2s->flags |= H2_SF_BLK_MBUSY;
5763 }
5764 else {
5765 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
5766 h2s_error(h2s, H2_ERR_CANCEL);
5767 }
5768 goto end;
5769 }
Willy Tarreau98de12a2018-12-12 07:03:00 +01005770
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005771 blk = htx_get_head_blk(htx);
5772 type = htx_get_blk_type(blk);
5773 bsize = htx_get_blksz(blk);
5774 fsize = bsize;
5775 trunc_out = 0;
5776 if (type != HTX_BLK_DATA)
5777 goto end;
5778
Willy Tarreau9c218e72019-05-26 10:08:28 +02005779 mbuf = br_tail(h2c->mbuf);
5780 retry:
5781 if (!h2_get_buf(h2c, mbuf)) {
5782 h2c->flags |= H2_CF_MUX_MALLOC;
5783 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005784 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 +02005785 goto end;
5786 }
5787
Willy Tarreau98de12a2018-12-12 07:03:00 +01005788 /* Perform some optimizations to reduce the number of buffer copies.
5789 * First, if the mux's buffer is empty and the htx area contains
5790 * exactly one data block of the same size as the requested count, and
5791 * this count fits within the frame size, the stream's window size, and
5792 * the connection's window size, then it's possible to simply swap the
5793 * caller's buffer with the mux's output buffer and adjust offsets and
5794 * length to match the entire DATA HTX block in the middle. In this
5795 * case we perform a true zero-copy operation from end-to-end. This is
5796 * the situation that happens all the time with large files. Second, if
5797 * this is not possible, but the mux's output buffer is empty, we still
5798 * have an opportunity to avoid the copy to the intermediary buffer, by
5799 * making the intermediary buffer's area point to the output buffer's
5800 * area. In this case we want to skip the HTX header to make sure that
5801 * copies remain aligned and that this operation remains possible all
5802 * the time. This goes for headers, data blocks and any data extracted
5803 * from the HTX blocks.
5804 */
5805 if (unlikely(fsize == count &&
Christopher Faulet192c6a22019-06-11 16:32:24 +02005806 htx_nbblks(htx) == 1 && type == HTX_BLK_DATA &&
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005807 fsize <= h2s_mws(h2s) && fsize <= h2c->mws && fsize <= h2c->mfs)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005808 void *old_area = mbuf->area;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005809
Willy Tarreaubcc45952019-05-26 10:05:50 +02005810 if (b_data(mbuf)) {
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005811 /* Too bad there are data left there. We're willing to memcpy/memmove
5812 * up to 1/4 of the buffer, which means that it's OK to copy a large
5813 * frame into a buffer containing few data if it needs to be realigned,
5814 * and that it's also OK to copy few data without realigning. Otherwise
5815 * we'll pretend the mbuf is full and wait for it to become empty.
Willy Tarreau98de12a2018-12-12 07:03:00 +01005816 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005817 if (fsize + 9 <= b_room(mbuf) &&
5818 (b_data(mbuf) <= b_size(mbuf) / 4 ||
Willy Tarreau7838a792019-08-12 18:42:03 +02005819 (fsize <= b_size(mbuf) / 4 && fsize + 9 <= b_contig_space(mbuf)))) {
5820 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 +01005821 goto copy;
Willy Tarreau7838a792019-08-12 18:42:03 +02005822 }
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005823
Willy Tarreau9c218e72019-05-26 10:08:28 +02005824 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5825 goto retry;
5826
Willy Tarreau98de12a2018-12-12 07:03:00 +01005827 h2c->flags |= H2_CF_MUX_MFULL;
5828 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005829 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 +01005830 goto end;
5831 }
5832
Christopher Faulet925abdf2021-04-27 22:51:07 +02005833 if (htx->flags & HTX_FL_EOM) {
5834 /* EOM+empty: we may need to add END_STREAM (except for tunneled
5835 * message)
5836 */
5837 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5838 es_now = 1;
5839 }
Willy Tarreau98de12a2018-12-12 07:03:00 +01005840 /* map an H2 frame to the HTX block so that we can put the
5841 * frame header there.
5842 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005843 *mbuf = b_make(buf->area, buf->size, sizeof(struct htx) + blk->addr - 9, fsize + 9);
5844 outbuf.area = b_head(mbuf);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005845
5846 /* prepend an H2 DATA frame header just before the DATA block */
5847 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5848 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
Christopher Faulet925abdf2021-04-27 22:51:07 +02005849 if (es_now)
5850 outbuf.area[4] |= H2_F_DATA_END_STREAM;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005851 h2_set_frame_size(outbuf.area, fsize);
5852
5853 /* update windows */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005854 h2s->sws -= fsize;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005855 h2c->mws -= fsize;
5856
5857 /* and exchange with our old area */
5858 buf->area = old_area;
5859 buf->data = buf->head = 0;
5860 total += fsize;
Christopher Faulet925abdf2021-04-27 22:51:07 +02005861 fsize = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005862
5863 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 +02005864 goto out;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005865 }
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005866
Willy Tarreau98de12a2018-12-12 07:03:00 +01005867 copy:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005868 /* for DATA and EOM we'll have to emit a frame, even if empty */
5869
5870 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005871 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5872 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005873 break;
5874 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005875 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005876 }
5877
5878 if (outbuf.size < 9) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02005879 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5880 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005881 h2c->flags |= H2_CF_MUX_MFULL;
5882 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005883 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005884 goto end;
5885 }
5886
5887 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
5888 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5889 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5890 outbuf.data = 9;
5891
5892 /* we have in <fsize> the exact number of bytes we need to copy from
5893 * the HTX buffer. We need to check this against the connection's and
5894 * the stream's send windows, and to ensure that this fits in the max
5895 * frame size and in the buffer's available space minus 9 bytes (for
5896 * the frame header). The connection's flow control is applied last so
5897 * that we can use a separate list of streams which are immediately
5898 * unblocked on window opening. Note: we don't implement padding.
5899 */
5900
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005901 if (!fsize)
5902 goto send_empty;
5903
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005904 if (h2s_mws(h2s) <= 0) {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005905 h2s->flags |= H2_SF_BLK_SFCTL;
Willy Tarreau2b718102021-04-21 07:32:39 +02005906 if (LIST_INLIST(&h2s->list))
Olivier Houchardbfe2a832019-05-10 14:02:21 +02005907 LIST_DEL_INIT(&h2s->list);
Willy Tarreau2b718102021-04-21 07:32:39 +02005908 LIST_APPEND(&h2c->blocked_list, &h2s->list);
Willy Tarreau7838a792019-08-12 18:42:03 +02005909 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 +01005910 goto end;
5911 }
5912
Willy Tarreauee573762018-12-04 15:25:57 +01005913 if (fsize > count)
5914 fsize = count;
5915
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005916 if (fsize > h2s_mws(h2s))
5917 fsize = h2s_mws(h2s); // >0
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005918
5919 if (h2c->mfs && fsize > h2c->mfs)
5920 fsize = h2c->mfs; // >0
5921
5922 if (fsize + 9 > outbuf.size) {
Willy Tarreau455d5682019-05-24 19:42:18 +02005923 /* It doesn't fit at once. If it at least fits once split and
5924 * the amount of data to move is low, let's defragment the
5925 * buffer now.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005926 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005927 if (b_space_wraps(mbuf) &&
5928 (fsize + 9 <= b_room(mbuf)) &&
5929 b_data(mbuf) <= MAX_DATA_REALIGN)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005930 goto realign_again;
5931 fsize = outbuf.size - 9;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005932 trunc_out = 1;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005933
5934 if (fsize <= 0) {
5935 /* no need to send an empty frame here */
Willy Tarreau9c218e72019-05-26 10:08:28 +02005936 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5937 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005938 h2c->flags |= H2_CF_MUX_MFULL;
5939 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005940 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005941 goto end;
5942 }
5943 }
5944
5945 if (h2c->mws <= 0) {
5946 h2s->flags |= H2_SF_BLK_MFCTL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005947 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 +01005948 goto end;
5949 }
5950
5951 if (fsize > h2c->mws)
5952 fsize = h2c->mws;
5953
5954 /* now let's copy this this into the output buffer */
5955 memcpy(outbuf.area + 9, htx_get_blk_ptr(htx, blk), fsize);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005956 h2s->sws -= fsize;
Willy Tarreau0f799ca2018-12-04 15:20:11 +01005957 h2c->mws -= fsize;
Willy Tarreauee573762018-12-04 15:25:57 +01005958 count -= fsize;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005959
5960 send_empty:
5961 /* update the frame's size */
5962 h2_set_frame_size(outbuf.area, fsize);
5963
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005964 /* consume incoming HTX block */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005965 total += fsize;
5966 if (fsize == bsize) {
5967 htx_remove_blk(htx, blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005968 if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx)) {
5969 /* EOM+empty: we may need to add END_STREAM (except for tunneled
5970 * message)
5971 */
5972 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5973 es_now = 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02005974 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005975 }
5976 else {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005977 /* we've truncated this block */
5978 htx_cut_data_blk(htx, blk, fsize);
5979 }
5980
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005981 if (es_now)
5982 outbuf.area[4] |= H2_F_DATA_END_STREAM;
5983
5984 /* commit the H2 response */
5985 b_add(mbuf, fsize + 9);
5986
Christopher Faulet925abdf2021-04-27 22:51:07 +02005987 out:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005988 if (es_now) {
5989 if (h2s->st == H2_SS_OPEN)
5990 h2s->st = H2_SS_HLOC;
5991 else
5992 h2s_close(h2s);
5993
5994 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005995 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 +01005996 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005997 else if (fsize) {
5998 if (fsize == bsize) {
5999 TRACE_DEVEL("more data may be available, trying to send another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6000 goto new_frame;
6001 }
6002 else if (trunc_out) {
6003 /* we've truncated this block */
6004 goto new_frame;
6005 }
6006 }
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006007
6008 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02006009 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006010 return total;
6011}
6012
Christopher Faulet991febd2020-12-02 15:17:31 +01006013/* Skip the message payload (DATA blocks) and emit an empty DATA frame with the
6014 * ES flag set for stream <h2s>. This function is called for response known to
6015 * have no payload. Only DATA blocks are skipped. This means the trailers are
Ilya Shipitsinacf84592021-02-06 22:29:08 +05006016 * still emitted. The caller must check the stream's status to detect any error
Christopher Faulet991febd2020-12-02 15:17:31 +01006017 * which might have happened subsequently to a successful send. Returns the
6018 * number of data bytes consumed, or zero if nothing done.
6019 */
6020static size_t h2s_skip_data(struct h2s *h2s, struct buffer *buf, size_t count)
6021{
6022 struct h2c *h2c = h2s->h2c;
6023 struct htx *htx;
6024 int bsize; /* htx block size */
6025 int fsize; /* h2 frame size */
6026 struct htx_blk *blk;
6027 enum htx_blk_type type;
6028 size_t total = 0;
6029
6030 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6031
6032 if (h2c_mux_busy(h2c, h2s)) {
6033 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6034 h2s->flags |= H2_SF_BLK_MBUSY;
6035 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6036 goto end;
6037 }
6038
6039 htx = htx_from_buf(buf);
6040
6041 next_data:
6042 if (!count || htx_is_empty(htx))
6043 goto end;
6044 blk = htx_get_head_blk(htx);
6045 type = htx_get_blk_type(blk);
6046 bsize = htx_get_blksz(blk);
6047 fsize = bsize;
6048 if (type != HTX_BLK_DATA)
6049 goto end;
6050
6051 if (fsize > count)
6052 fsize = count;
6053
6054 if (fsize != bsize)
6055 goto skip_data;
6056
6057 if (!(htx->flags & HTX_FL_EOM) || !htx_is_unique_blk(htx, blk))
6058 goto skip_data;
6059
6060 /* Here, it is the last block and it is also the end of the message. So
6061 * we can emit an empty DATA frame with the ES flag set
6062 */
6063 if (h2_send_empty_data_es(h2s) <= 0)
6064 goto end;
6065
6066 if (h2s->st == H2_SS_OPEN)
6067 h2s->st = H2_SS_HLOC;
6068 else
6069 h2s_close(h2s);
6070
6071 skip_data:
6072 /* consume incoming HTX block */
6073 total += fsize;
6074 if (fsize == bsize) {
6075 TRACE_DEVEL("more data may be available, trying to skip another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6076 htx_remove_blk(htx, blk);
6077 goto next_data;
6078 }
6079 else {
6080 /* we've truncated this block */
6081 htx_cut_data_blk(htx, blk, fsize);
6082 }
6083
6084 end:
6085 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6086 return total;
6087}
6088
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006089/* Try to send a HEADERS frame matching HTX_BLK_TLR series of blocks present in
6090 * HTX message <htx> for the H2 stream <h2s>. Returns the number of bytes
6091 * processed. The caller must check the stream's status to detect any error
6092 * which might have happened subsequently to a successful send. The htx blocks
6093 * are automatically removed from the message. The htx message is assumed to be
6094 * valid since produced from the internal code. Processing stops when meeting
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006095 * the EOT, which *is* removed. All trailers are processed at once and sent as a
6096 * single frame. The ES flag is always set.
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006097 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006098static size_t h2s_make_trailers(struct h2s *h2s, struct htx *htx)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006099{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02006100 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006101 struct h2c *h2c = h2s->h2c;
6102 struct htx_blk *blk;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006103 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02006104 struct buffer *mbuf;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006105 enum htx_blk_type type;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006106 int ret = 0;
6107 int hdr;
6108 int idx;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006109
Willy Tarreau7838a792019-08-12 18:42:03 +02006110 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
6111
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006112 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006113 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006114 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02006115 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006116 goto end;
6117 }
6118
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006119 /* get trailers. */
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006120 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006121 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006122 type = htx_get_blk_type(blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006123
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006124 if (type == HTX_BLK_UNUSED)
6125 continue;
6126
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006127 if (type == HTX_BLK_EOT)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006128 break;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006129 if (type == HTX_BLK_TLR) {
6130 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
6131 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
6132 goto fail;
6133 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006134
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006135 list[hdr].n = htx_get_blk_name(htx, blk);
6136 list[hdr].v = htx_get_blk_value(htx, blk);
6137 hdr++;
6138 }
6139 else {
6140 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 +01006141 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02006142 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006143 }
6144
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006145 /* marker for end of trailers */
6146 list[hdr].n = ist("");
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006147
Willy Tarreau9c218e72019-05-26 10:08:28 +02006148 mbuf = br_tail(h2c->mbuf);
6149 retry:
6150 if (!h2_get_buf(h2c, mbuf)) {
6151 h2c->flags |= H2_CF_MUX_MALLOC;
6152 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02006153 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 +02006154 goto end;
6155 }
6156
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006157 chunk_reset(&outbuf);
6158
6159 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02006160 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
6161 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006162 break;
6163 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02006164 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006165 }
6166
6167 if (outbuf.size < 9)
6168 goto full;
6169
6170 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4,ES=1 */
6171 memcpy(outbuf.area, "\x00\x00\x00\x01\x05", 5);
6172 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
6173 outbuf.data = 9;
6174
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006175 /* encode all headers */
6176 for (idx = 0; idx < hdr; idx++) {
6177 /* these ones do not exist in H2 or must not appear in
6178 * trailers and must be dropped.
6179 */
6180 if (isteq(list[idx].n, ist("host")) ||
6181 isteq(list[idx].n, ist("content-length")) ||
6182 isteq(list[idx].n, ist("connection")) ||
6183 isteq(list[idx].n, ist("proxy-connection")) ||
6184 isteq(list[idx].n, ist("keep-alive")) ||
6185 isteq(list[idx].n, ist("upgrade")) ||
6186 isteq(list[idx].n, ist("te")) ||
6187 isteq(list[idx].n, ist("transfer-encoding")))
6188 continue;
6189
Christopher Faulet86d144c2019-08-14 16:32:25 +02006190 /* Skip all pseudo-headers */
6191 if (*(list[idx].n.ptr) == ':')
6192 continue;
6193
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006194 if (!hpack_encode_header(&outbuf, list[idx].n, list[idx].v)) {
6195 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02006196 if (b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006197 goto realign_again;
6198 goto full;
6199 }
6200 }
6201
Willy Tarreau5121e5d2019-05-06 15:13:41 +02006202 if (outbuf.data == 9) {
6203 /* here we have a problem, we have nothing to emit (either we
6204 * received an empty trailers block followed or we removed its
6205 * contents above). Because of this we can't send a HEADERS
6206 * frame, so we have to cheat and instead send an empty DATA
6207 * frame conveying the ES flag.
Willy Tarreau67b8cae2019-02-21 18:16:35 +01006208 */
6209 outbuf.area[3] = H2_FT_DATA;
6210 outbuf.area[4] = H2_F_DATA_END_STREAM;
6211 }
6212
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006213 /* update the frame's size */
6214 h2_set_frame_size(outbuf.area, outbuf.data - 9);
6215
Willy Tarreau572d9f52019-10-11 16:58:37 +02006216 if (outbuf.data > h2c->mfs + 9) {
6217 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
6218 /* output full */
6219 if (b_space_wraps(mbuf))
6220 goto realign_again;
6221 goto full;
6222 }
6223 }
6224
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006225 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02006226 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 +02006227 b_add(mbuf, outbuf.data);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006228 h2s->flags |= H2_SF_ES_SENT;
6229
6230 if (h2s->st == H2_SS_OPEN)
6231 h2s->st = H2_SS_HLOC;
6232 else
6233 h2s_close(h2s);
6234
6235 /* OK we could properly deliver the response */
6236 done:
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02006237 /* remove all header blocks till the end and compute the corresponding size. */
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006238 ret = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006239 blk = htx_get_head_blk(htx);
6240 while (blk) {
6241 type = htx_get_blk_type(blk);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006242 ret += htx_get_blksz(blk);
6243 blk = htx_remove_blk(htx, blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006244 /* The removed block is the EOT */
6245 if (type == HTX_BLK_EOT)
6246 break;
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006247 }
6248
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006249 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02006250 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006251 return ret;
6252 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02006253 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
6254 goto retry;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006255 h2c->flags |= H2_CF_MUX_MFULL;
6256 h2s->flags |= H2_SF_BLK_MROOM;
6257 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006258 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 +01006259 goto end;
6260 fail:
6261 /* unparsable HTX messages, too large ones to be produced in the local
6262 * list etc go here (unrecoverable errors).
6263 */
6264 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
6265 ret = 0;
6266 goto end;
6267}
6268
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006269/* Called from the upper layer, to subscribe <es> to events <event_type>. The
6270 * event subscriber <es> is not allowed to change from a previous call as long
6271 * as at least one event is still subscribed. The <event_type> must only be a
6272 * combination of SUB_RETRY_RECV and SUB_RETRY_SEND. It always returns 0.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006273 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006274static int h2_subscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard6ff20392018-07-17 18:46:31 +02006275{
Olivier Houchard6ff20392018-07-17 18:46:31 +02006276 struct h2s *h2s = cs->ctx;
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02006277 struct h2c *h2c = h2s->h2c;
Olivier Houchard6ff20392018-07-17 18:46:31 +02006278
Willy Tarreau7838a792019-08-12 18:42:03 +02006279 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006280
6281 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006282 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006283
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006284 es->events |= event_type;
6285 h2s->subs = es;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006286
6287 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006288 TRACE_DEVEL("subscribe(recv)", H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006289
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006290 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006291 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2c->conn, h2s);
Olivier Houchardf8338152019-05-14 17:50:32 +02006292 if (!(h2s->flags & H2_SF_BLK_SFCTL) &&
Willy Tarreau2b718102021-04-21 07:32:39 +02006293 !LIST_INLIST(&h2s->list)) {
Olivier Houchardf8338152019-05-14 17:50:32 +02006294 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02006295 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Olivier Houchardf8338152019-05-14 17:50:32 +02006296 else
Willy Tarreau2b718102021-04-21 07:32:39 +02006297 LIST_APPEND(&h2c->send_list, &h2s->list);
Olivier Houcharde1c6dbc2018-08-01 17:06:43 +02006298 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02006299 }
Willy Tarreau7838a792019-08-12 18:42:03 +02006300 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006301 return 0;
Olivier Houchard6ff20392018-07-17 18:46:31 +02006302}
6303
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006304/* Called from the upper layer, to unsubscribe <es> from events <event_type>.
6305 * The <es> pointer is not allowed to differ from the one passed to the
6306 * subscribe() call. It always returns zero.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006307 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006308static int h2_unsubscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006309{
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006310 struct h2s *h2s = cs->ctx;
6311
Willy Tarreau7838a792019-08-12 18:42:03 +02006312 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006313
6314 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006315 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006316
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006317 es->events &= ~event_type;
6318 if (!es->events)
Willy Tarreauf96508a2020-01-10 11:12:48 +01006319 h2s->subs = NULL;
6320
6321 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006322 TRACE_DEVEL("unsubscribe(recv)", H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006323
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006324 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006325 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006326 h2s->flags &= ~H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006327 if (!(h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)))
6328 LIST_DEL_INIT(&h2s->list);
Olivier Houchardd846c262018-10-19 17:24:29 +02006329 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01006330
Willy Tarreau7838a792019-08-12 18:42:03 +02006331 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006332 return 0;
6333}
6334
6335
Christopher Faulet93a466b2021-09-21 15:50:55 +02006336/* Called from the upper layer, to receive data
6337 *
6338 * The caller is responsible for defragmenting <buf> if necessary. But <flags>
6339 * must be tested to know the calling context. If CO_RFL_BUF_FLUSH is set, it
6340 * means the caller wants to flush input data (from the mux buffer and the
6341 * channel buffer) to be able to use kernel splicing or any kind of mux-to-mux
6342 * xfer. If CO_RFL_KEEP_RECV is set, the mux must always subscribe for read
6343 * events before giving back. CO_RFL_BUF_WET is set if <buf> is congested with
6344 * data scheduled for leaving soon. CO_RFL_BUF_NOT_STUCK is set to instruct the
6345 * mux it may optimize the data copy to <buf> if necessary. Otherwise, it should
6346 * copy as much data as possible.
6347 */
Olivier Houchard511efea2018-08-16 15:30:32 +02006348static size_t h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
6349{
Olivier Houchard638b7992018-08-16 15:41:52 +02006350 struct h2s *h2s = cs->ctx;
Willy Tarreau082f5592018-11-25 08:03:32 +01006351 struct h2c *h2c = h2s->h2c;
Willy Tarreau86724e22018-12-01 23:19:43 +01006352 struct htx *h2s_htx = NULL;
6353 struct htx *buf_htx = NULL;
Olivier Houchard511efea2018-08-16 15:30:32 +02006354 size_t ret = 0;
6355
Willy Tarreau7838a792019-08-12 18:42:03 +02006356 TRACE_ENTER(H2_EV_STRM_RECV, h2c->conn, h2s);
6357
Olivier Houchard511efea2018-08-16 15:30:32 +02006358 /* transfer possibly pending data to the upper layer */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006359 h2s_htx = htx_from_buf(&h2s->rxbuf);
Christopher Faulet83f3d3d2022-02-21 15:12:54 +01006360 if (htx_is_empty(h2s_htx) && !(h2s_htx->flags & HTX_FL_PARSING_ERROR)) {
Christopher Faulet9b79a102019-07-15 11:22:56 +02006361 /* Here htx_to_buf() will set buffer data to 0 because
6362 * the HTX is empty.
6363 */
6364 htx_to_buf(h2s_htx, &h2s->rxbuf);
6365 goto end;
6366 }
Willy Tarreau7196dd62019-03-05 10:51:11 +01006367
Christopher Faulet9b79a102019-07-15 11:22:56 +02006368 ret = h2s_htx->data;
6369 buf_htx = htx_from_buf(buf);
Willy Tarreau7196dd62019-03-05 10:51:11 +01006370
Christopher Faulet9b79a102019-07-15 11:22:56 +02006371 /* <buf> is empty and the message is small enough, swap the
6372 * buffers. */
6373 if (htx_is_empty(buf_htx) && htx_used_space(h2s_htx) <= count) {
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01006374 htx_to_buf(buf_htx, buf);
6375 htx_to_buf(h2s_htx, &h2s->rxbuf);
Christopher Faulet9b79a102019-07-15 11:22:56 +02006376 b_xfer(buf, &h2s->rxbuf, b_data(&h2s->rxbuf));
6377 goto end;
Willy Tarreau86724e22018-12-01 23:19:43 +01006378 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02006379
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006380 htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_UNUSED);
Christopher Faulet9b79a102019-07-15 11:22:56 +02006381
6382 if (h2s_htx->flags & HTX_FL_PARSING_ERROR) {
6383 buf_htx->flags |= HTX_FL_PARSING_ERROR;
6384 if (htx_is_empty(buf_htx))
6385 cs->flags |= CS_FL_EOI;
Willy Tarreau86724e22018-12-01 23:19:43 +01006386 }
Christopher Faulet810df062020-07-22 16:20:34 +02006387 else if (htx_is_empty(h2s_htx))
Christopher Faulet42432f32020-11-20 17:43:16 +01006388 buf_htx->flags |= (h2s_htx->flags & HTX_FL_EOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02006389
Christopher Faulet9b79a102019-07-15 11:22:56 +02006390 buf_htx->extra = (h2s_htx->extra ? (h2s_htx->data + h2s_htx->extra) : 0);
6391 htx_to_buf(buf_htx, buf);
6392 htx_to_buf(h2s_htx, &h2s->rxbuf);
6393 ret -= h2s_htx->data;
6394
Christopher Faulet37070b22019-02-14 15:12:14 +01006395 end:
Olivier Houchard638b7992018-08-16 15:41:52 +02006396 if (b_data(&h2s->rxbuf))
Olivier Houchardd247be02018-12-06 16:22:29 +01006397 cs->flags |= (CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02006398 else {
Olivier Houchardd247be02018-12-06 16:22:29 +01006399 cs->flags &= ~(CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Christopher Fauletd0db4232021-01-22 11:46:30 +01006400 if (h2s->flags & H2_SF_ES_RCVD) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02006401 cs->flags |= CS_FL_EOI;
Christopher Fauletd0db4232021-01-22 11:46:30 +01006402 /* Add EOS flag for tunnel */
6403 if (h2s->flags & H2_SF_BODY_TUNNEL)
6404 cs->flags |= CS_FL_EOS;
6405 }
Christopher Fauletaade4ed2020-10-08 15:38:41 +02006406 if (h2c_read0_pending(h2c) || h2s->st == H2_SS_CLOSED)
Olivier Houchard511efea2018-08-16 15:30:32 +02006407 cs->flags |= CS_FL_EOS;
Olivier Houchard71748cb2018-12-17 14:16:46 +01006408 if (cs->flags & CS_FL_ERR_PENDING)
6409 cs->flags |= CS_FL_ERROR;
Olivier Houchard638b7992018-08-16 15:41:52 +02006410 if (b_size(&h2s->rxbuf)) {
6411 b_free(&h2s->rxbuf);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01006412 offer_buffers(NULL, 1);
Olivier Houchard638b7992018-08-16 15:41:52 +02006413 }
Olivier Houchard511efea2018-08-16 15:30:32 +02006414 }
6415
Willy Tarreau082f5592018-11-25 08:03:32 +01006416 if (ret && h2c->dsi == h2s->id) {
6417 /* demux is blocking on this stream's buffer */
6418 h2c->flags &= ~H2_CF_DEM_SFULL;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02006419 h2c_restart_reading(h2c, 1);
Willy Tarreau082f5592018-11-25 08:03:32 +01006420 }
Christopher Faulet37070b22019-02-14 15:12:14 +01006421
Willy Tarreau7838a792019-08-12 18:42:03 +02006422 TRACE_LEAVE(H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard511efea2018-08-16 15:30:32 +02006423 return ret;
6424}
6425
Olivier Houchardd846c262018-10-19 17:24:29 +02006426
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006427/* Called from the upper layer, to send data from buffer <buf> for no more than
6428 * <count> bytes. Returns the number of bytes effectively sent. Some status
6429 * flags may be updated on the conn_stream.
6430 */
Christopher Fauletd44a9b32018-07-27 11:59:41 +02006431static size_t h2_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
Willy Tarreau62f52692017-10-08 23:01:42 +02006432{
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006433 struct h2s *h2s = cs->ctx;
Willy Tarreau1dc41e72018-06-14 13:21:28 +02006434 size_t total = 0;
Willy Tarreau5dd17352018-06-14 13:33:30 +02006435 size_t ret;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006436 struct htx *htx;
6437 struct htx_blk *blk;
6438 enum htx_blk_type btype;
6439 uint32_t bsize;
6440 int32_t idx;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006441
Willy Tarreau7838a792019-08-12 18:42:03 +02006442 TRACE_ENTER(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
6443
Olivier Houchardd360ac62019-03-22 17:37:16 +01006444 /* If we were not just woken because we wanted to send but couldn't,
6445 * and there's somebody else that is waiting to send, do nothing,
6446 * we will subscribe later and be put at the end of the list
6447 */
Willy Tarreaud9464162020-01-10 18:25:07 +01006448 if (!(h2s->flags & H2_SF_NOTIFIED) &&
Willy Tarreau7838a792019-08-12 18:42:03 +02006449 (!LIST_ISEMPTY(&h2s->h2c->send_list) || !LIST_ISEMPTY(&h2s->h2c->fctl_list))) {
6450 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 +01006451 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006452 }
Willy Tarreaud9464162020-01-10 18:25:07 +01006453 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02006454
Willy Tarreau7838a792019-08-12 18:42:03 +02006455 if (h2s->h2c->st0 < H2_CS_FRAME_H) {
6456 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 +02006457 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006458 }
Willy Tarreau6bf641a2018-10-08 09:43:03 +02006459
Willy Tarreaucab22952019-10-31 15:48:18 +01006460 if (h2s->h2c->st0 >= H2_CS_ERROR) {
6461 cs->flags |= CS_FL_ERROR;
6462 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);
6463 return 0;
6464 }
6465
Christopher Faulet9b79a102019-07-15 11:22:56 +02006466 htx = htx_from_buf(buf);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006467
Willy Tarreau0bad0432018-06-14 16:54:01 +02006468 if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count)
Willy Tarreauc4312d32017-11-07 12:01:53 +01006469 h2s->flags |= H2_SF_OUTGOING_DATA;
6470
Willy Tarreau751f2d02018-10-05 09:35:00 +02006471 if (h2s->id == 0) {
6472 int32_t id = h2c_get_next_sid(h2s->h2c);
6473
6474 if (id < 0) {
Willy Tarreau751f2d02018-10-05 09:35:00 +02006475 cs->flags |= CS_FL_ERROR;
Willy Tarreau7838a792019-08-12 18:42:03 +02006476 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 +02006477 return 0;
6478 }
6479
6480 eb32_delete(&h2s->by_id);
6481 h2s->by_id.key = h2s->id = id;
6482 h2s->h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01006483 h2s->h2c->nb_reserved--;
Willy Tarreau751f2d02018-10-05 09:35:00 +02006484 eb32_insert(&h2s->h2c->streams_by_id, &h2s->by_id);
6485 }
6486
Christopher Faulet9b79a102019-07-15 11:22:56 +02006487 while (h2s->st < H2_SS_HLOC && !(h2s->flags & H2_SF_BLK_ANY) &&
6488 count && !htx_is_empty(htx)) {
6489 idx = htx_get_head(htx);
6490 blk = htx_get_blk(htx, idx);
6491 btype = htx_get_blk_type(blk);
6492 bsize = htx_get_blksz(blk);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006493
Christopher Faulet9b79a102019-07-15 11:22:56 +02006494 switch (btype) {
Willy Tarreau80739692018-10-05 11:35:57 +02006495 case HTX_BLK_REQ_SL:
6496 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006497 ret = h2s_bck_make_req_headers(h2s, htx);
Willy Tarreau80739692018-10-05 11:35:57 +02006498 if (ret > 0) {
6499 total += ret;
6500 count -= ret;
6501 if (ret < bsize)
6502 goto done;
6503 }
6504 break;
6505
Willy Tarreau115e83b2018-12-01 19:17:53 +01006506 case HTX_BLK_RES_SL:
6507 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006508 ret = h2s_frt_make_resp_headers(h2s, htx);
Willy Tarreau115e83b2018-12-01 19:17:53 +01006509 if (ret > 0) {
6510 total += ret;
6511 count -= ret;
6512 if (ret < bsize)
6513 goto done;
6514 }
6515 break;
6516
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006517 case HTX_BLK_DATA:
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006518 /* all these cause the emission of a DATA frame (possibly empty) */
Christopher Faulet991febd2020-12-02 15:17:31 +01006519 if (!(h2s->h2c->flags & H2_CF_IS_BACK) &&
6520 (h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_BODYLESS_RESP)) == H2_SF_BODYLESS_RESP)
6521 ret = h2s_skip_data(h2s, buf, count);
6522 else
6523 ret = h2s_make_data(h2s, buf, count);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006524 if (ret > 0) {
Willy Tarreau98de12a2018-12-12 07:03:00 +01006525 htx = htx_from_buf(buf);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006526 total += ret;
6527 count -= ret;
6528 if (ret < bsize)
6529 goto done;
6530 }
6531 break;
6532
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006533 case HTX_BLK_TLR:
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006534 case HTX_BLK_EOT:
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006535 /* This is the first trailers block, all the subsequent ones */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006536 ret = h2s_make_trailers(h2s, htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006537 if (ret > 0) {
6538 total += ret;
6539 count -= ret;
6540 if (ret < bsize)
6541 goto done;
6542 }
6543 break;
6544
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006545 default:
6546 htx_remove_blk(htx, blk);
6547 total += bsize;
6548 count -= bsize;
6549 break;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006550 }
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006551 }
6552
Christopher Faulet9b79a102019-07-15 11:22:56 +02006553 done:
Willy Tarreau2b778482019-05-06 15:00:22 +02006554 if (h2s->st >= H2_SS_HLOC) {
Willy Tarreau00610962018-07-19 10:58:28 +02006555 /* trim any possibly pending data after we close (extra CR-LF,
6556 * unprocessed trailers, abnormal extra data, ...)
6557 */
Willy Tarreau0bad0432018-06-14 16:54:01 +02006558 total += count;
6559 count = 0;
Willy Tarreau00610962018-07-19 10:58:28 +02006560 }
6561
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006562 /* RST are sent similarly to frame acks */
Willy Tarreau02492192017-12-07 15:59:29 +01006563 if (h2s->st == H2_SS_ERROR || h2s->flags & H2_SF_RST_RCVD) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006564 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 +01006565 cs_set_error(cs);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01006566 if (h2s_send_rst_stream(h2s->h2c, h2s) > 0)
Willy Tarreau00dd0782018-03-01 16:31:34 +01006567 h2s_close(h2s);
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006568 }
6569
Christopher Faulet9b79a102019-07-15 11:22:56 +02006570 htx_to_buf(htx, buf);
Olivier Houchardd846c262018-10-19 17:24:29 +02006571
Olivier Houchard7505f942018-08-21 18:10:44 +02006572 if (total > 0) {
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006573 if (!(h2s->h2c->wait_event.events & SUB_RETRY_SEND)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006574 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 +02006575 tasklet_wakeup(h2s->h2c->wait_event.tasklet);
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006576 }
Olivier Houchardd846c262018-10-19 17:24:29 +02006577
Olivier Houchard7505f942018-08-21 18:10:44 +02006578 }
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01006579 /* If we're waiting for flow control, and we got a shutr on the
6580 * connection, we will never be unlocked, so add an error on
6581 * the conn_stream.
6582 */
6583 if (conn_xprt_read0_pending(h2s->h2c->conn) &&
6584 !b_data(&h2s->h2c->dbuf) &&
6585 (h2s->flags & (H2_SF_BLK_SFCTL | H2_SF_BLK_MFCTL))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006586 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 +01006587 if (cs->flags & CS_FL_EOS)
6588 cs->flags |= CS_FL_ERROR;
6589 else
6590 cs->flags |= CS_FL_ERR_PENDING;
6591 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006592
Willy Tarreau5723f292020-01-10 15:16:57 +01006593 if (total > 0 && !(h2s->flags & H2_SF_BLK_SFCTL) &&
6594 !(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006595 /* Ok we managed to send something, leave the send_list if we were still there */
Olivier Houchardd360ac62019-03-22 17:37:16 +01006596 LIST_DEL_INIT(&h2s->list);
6597 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006598
Willy Tarreau7838a792019-08-12 18:42:03 +02006599 TRACE_LEAVE(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006600 return total;
Willy Tarreau62f52692017-10-08 23:01:42 +02006601}
6602
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006603/* for debugging with CLI's "show fd" command */
Willy Tarreau8050efe2021-01-21 08:26:06 +01006604static int h2_show_fd(struct buffer *msg, struct connection *conn)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006605{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01006606 struct h2c *h2c = conn->ctx;
Willy Tarreau987c0632018-12-18 10:32:05 +01006607 struct h2s *h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006608 struct eb32_node *node;
6609 int fctl_cnt = 0;
6610 int send_cnt = 0;
6611 int tree_cnt = 0;
6612 int orph_cnt = 0;
Willy Tarreau60f62682019-05-26 11:32:27 +02006613 struct buffer *hmbuf, *tmbuf;
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006614 int ret = 0;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006615
6616 if (!h2c)
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006617 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006618
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006619 list_for_each_entry(h2s, &h2c->fctl_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006620 fctl_cnt++;
6621
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006622 list_for_each_entry(h2s, &h2c->send_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006623 send_cnt++;
6624
Willy Tarreau3af37712018-12-18 14:34:41 +01006625 h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006626 node = eb32_first(&h2c->streams_by_id);
6627 while (node) {
6628 h2s = container_of(node, struct h2s, by_id);
6629 tree_cnt++;
6630 if (!h2s->cs)
6631 orph_cnt++;
6632 node = eb32_next(node);
6633 }
6634
Willy Tarreau60f62682019-05-26 11:32:27 +02006635 hmbuf = br_head(h2c->mbuf);
Willy Tarreaubcc45952019-05-26 10:05:50 +02006636 tmbuf = br_tail(h2c->mbuf);
Willy Tarreauab2ec452019-08-30 07:07:08 +02006637 chunk_appendf(msg, " h2c.st0=%s .err=%d .maxid=%d .lastid=%d .flg=0x%04x"
Willy Tarreau987c0632018-12-18 10:32:05 +01006638 " .nbst=%u .nbcs=%u .fctl_cnt=%d .send_cnt=%d .tree_cnt=%d"
Willy Tarreau60f62682019-05-26 11:32:27 +02006639 " .orph_cnt=%d .sub=%d .dsi=%d .dbuf=%u@%p+%u/%u .msi=%d"
6640 " .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]",
Willy Tarreauab2ec452019-08-30 07:07:08 +02006641 h2c_st_to_str(h2c->st0), h2c->errcode, h2c->max_id, h2c->last_sid, h2c->flags,
Willy Tarreau616ac812018-07-24 14:12:42 +02006642 h2c->nb_streams, h2c->nb_cs, fctl_cnt, send_cnt, tree_cnt, orph_cnt,
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006643 h2c->wait_event.events, h2c->dsi,
Willy Tarreau987c0632018-12-18 10:32:05 +01006644 (unsigned int)b_data(&h2c->dbuf), b_orig(&h2c->dbuf),
6645 (unsigned int)b_head_ofs(&h2c->dbuf), (unsigned int)b_size(&h2c->dbuf),
6646 h2c->msi,
Willy Tarreau60f62682019-05-26 11:32:27 +02006647 br_head_idx(h2c->mbuf), br_tail_idx(h2c->mbuf), br_size(h2c->mbuf),
6648 (unsigned int)b_data(hmbuf), b_orig(hmbuf),
6649 (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf),
Willy Tarreaubcc45952019-05-26 10:05:50 +02006650 (unsigned int)b_data(tmbuf), b_orig(tmbuf),
6651 (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf));
Willy Tarreau987c0632018-12-18 10:32:05 +01006652
6653 if (h2s) {
Willy Tarreaued4464e2021-01-20 15:50:03 +01006654 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 +02006655 h2s, h2s->id, h2s_st_to_str(h2s->st), h2s->flags,
Willy Tarreau987c0632018-12-18 10:32:05 +01006656 (unsigned int)b_data(&h2s->rxbuf), b_orig(&h2s->rxbuf),
6657 (unsigned int)b_head_ofs(&h2s->rxbuf), (unsigned int)b_size(&h2s->rxbuf),
6658 h2s->cs);
6659 if (h2s->cs)
Willy Tarreau98e40b92021-01-20 16:27:01 +01006660 chunk_appendf(msg, "(.flg=0x%08x .data=%p)",
Willy Tarreau987c0632018-12-18 10:32:05 +01006661 h2s->cs->flags, h2s->cs->data);
Willy Tarreau98e40b92021-01-20 16:27:01 +01006662
6663 chunk_appendf(&trash, " .subs=%p", h2s->subs);
6664 if (h2s->subs) {
Christopher Faulet6c93c4e2021-02-25 10:06:29 +01006665 chunk_appendf(&trash, "(ev=%d tl=%p", h2s->subs->events, h2s->subs->tasklet);
6666 chunk_appendf(&trash, " tl.calls=%d tl.ctx=%p tl.fct=",
6667 h2s->subs->tasklet->calls,
6668 h2s->subs->tasklet->context);
6669 if (h2s->subs->tasklet->calls >= 1000000)
6670 ret = 1;
6671 resolve_sym_name(&trash, NULL, h2s->subs->tasklet->process);
6672 chunk_appendf(&trash, ")");
Willy Tarreau98e40b92021-01-20 16:27:01 +01006673 }
Willy Tarreau987c0632018-12-18 10:32:05 +01006674 }
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006675 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006676}
Willy Tarreau62f52692017-10-08 23:01:42 +02006677
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006678/* Migrate the the connection to the current thread.
6679 * Return 0 if successful, non-zero otherwise.
6680 * Expected to be called with the old thread lock held.
6681 */
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006682static int h2_takeover(struct connection *conn, int orig_tid)
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006683{
6684 struct h2c *h2c = conn->ctx;
Willy Tarreau617e80f2020-07-01 16:39:33 +02006685 struct task *task;
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006686
6687 if (fd_takeover(conn->handle.fd, conn) != 0)
6688 return -1;
Olivier Houcharda74bb7e2020-07-03 14:01:21 +02006689
6690 if (conn->xprt->takeover && conn->xprt->takeover(conn, conn->xprt_ctx, orig_tid) != 0) {
6691 /* We failed to takeover the xprt, even if the connection may
6692 * still be valid, flag it as error'd, as we have already
6693 * taken over the fd, and wake the tasklet, so that it will
6694 * destroy it.
6695 */
6696 conn->flags |= CO_FL_ERROR;
6697 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
6698 return -1;
6699 }
6700
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006701 if (h2c->wait_event.events)
6702 h2c->conn->xprt->unsubscribe(h2c->conn, h2c->conn->xprt_ctx,
6703 h2c->wait_event.events, &h2c->wait_event);
6704 /* To let the tasklet know it should free itself, and do nothing else,
6705 * set its context to NULL.
6706 */
6707 h2c->wait_event.tasklet->context = NULL;
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006708 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
Willy Tarreau617e80f2020-07-01 16:39:33 +02006709
6710 task = h2c->task;
6711 if (task) {
6712 task->context = NULL;
6713 h2c->task = NULL;
6714 __ha_barrier_store();
6715 task_kill(task);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006716
6717 h2c->task = task_new(tid_bit);
6718 if (!h2c->task) {
6719 h2_release(h2c);
6720 return -1;
6721 }
6722 h2c->task->process = h2_timeout_task;
6723 h2c->task->context = h2c;
6724 }
6725 h2c->wait_event.tasklet = tasklet_new();
6726 if (!h2c->wait_event.tasklet) {
6727 h2_release(h2c);
6728 return -1;
6729 }
6730 h2c->wait_event.tasklet->process = h2_io_cb;
6731 h2c->wait_event.tasklet->context = h2c;
6732 h2c->conn->xprt->subscribe(h2c->conn, h2c->conn->xprt_ctx,
6733 SUB_RETRY_RECV, &h2c->wait_event);
6734
6735 return 0;
6736}
6737
Willy Tarreau62f52692017-10-08 23:01:42 +02006738/*******************************************************/
6739/* functions below are dedicated to the config parsers */
6740/*******************************************************/
6741
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006742/* config parser for global "tune.h2.header-table-size" */
6743static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006744 const struct proxy *defpx, const char *file, int line,
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006745 char **err)
6746{
6747 if (too_many_args(1, args, err, NULL))
6748 return -1;
6749
6750 h2_settings_header_table_size = atoi(args[1]);
6751 if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) {
6752 memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]);
6753 return -1;
6754 }
6755 return 0;
6756}
Willy Tarreau62f52692017-10-08 23:01:42 +02006757
Willy Tarreaue6baec02017-07-27 11:45:11 +02006758/* config parser for global "tune.h2.initial-window-size" */
6759static int h2_parse_initial_window_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006760 const struct proxy *defpx, const char *file, int line,
Willy Tarreaue6baec02017-07-27 11:45:11 +02006761 char **err)
6762{
6763 if (too_many_args(1, args, err, NULL))
6764 return -1;
6765
6766 h2_settings_initial_window_size = atoi(args[1]);
6767 if (h2_settings_initial_window_size < 0) {
6768 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6769 return -1;
6770 }
6771 return 0;
6772}
6773
Willy Tarreau5242ef82017-07-27 11:47:28 +02006774/* config parser for global "tune.h2.max-concurrent-streams" */
6775static int h2_parse_max_concurrent_streams(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006776 const struct proxy *defpx, const char *file, int line,
Willy Tarreau5242ef82017-07-27 11:47:28 +02006777 char **err)
6778{
6779 if (too_many_args(1, args, err, NULL))
6780 return -1;
6781
6782 h2_settings_max_concurrent_streams = atoi(args[1]);
Willy Tarreau5a490b62019-01-31 10:39:51 +01006783 if ((int)h2_settings_max_concurrent_streams < 0) {
Willy Tarreau5242ef82017-07-27 11:47:28 +02006784 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6785 return -1;
6786 }
6787 return 0;
6788}
6789
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006790/* config parser for global "tune.h2.max-frame-size" */
6791static int h2_parse_max_frame_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006792 const struct proxy *defpx, const char *file, int line,
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006793 char **err)
6794{
6795 if (too_many_args(1, args, err, NULL))
6796 return -1;
6797
6798 h2_settings_max_frame_size = atoi(args[1]);
6799 if (h2_settings_max_frame_size < 16384 || h2_settings_max_frame_size > 16777215) {
6800 memprintf(err, "'%s' expects a numeric value between 16384 and 16777215.", args[0]);
6801 return -1;
6802 }
6803 return 0;
6804}
6805
Willy Tarreau62f52692017-10-08 23:01:42 +02006806
6807/****************************************/
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05006808/* MUX initialization and instantiation */
Willy Tarreau62f52692017-10-08 23:01:42 +02006809/***************************************/
6810
6811/* The mux operations */
Willy Tarreau680b2bd2018-11-27 07:30:17 +01006812static const struct mux_ops h2_ops = {
Willy Tarreau62f52692017-10-08 23:01:42 +02006813 .init = h2_init,
Olivier Houchard21df6cc2018-09-14 23:21:44 +02006814 .wake = h2_wake,
Willy Tarreau62f52692017-10-08 23:01:42 +02006815 .snd_buf = h2_snd_buf,
Olivier Houchard511efea2018-08-16 15:30:32 +02006816 .rcv_buf = h2_rcv_buf,
Olivier Houchard6ff20392018-07-17 18:46:31 +02006817 .subscribe = h2_subscribe,
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006818 .unsubscribe = h2_unsubscribe,
Willy Tarreau62f52692017-10-08 23:01:42 +02006819 .attach = h2_attach,
Willy Tarreaufafd3982018-11-18 21:29:20 +01006820 .get_first_cs = h2_get_first_cs,
Willy Tarreau62f52692017-10-08 23:01:42 +02006821 .detach = h2_detach,
Olivier Houchard060ed432018-11-06 16:32:42 +01006822 .destroy = h2_destroy,
Olivier Houchardd540b362018-11-05 18:37:53 +01006823 .avail_streams = h2_avail_streams,
Willy Tarreau00f18a32019-01-26 12:19:01 +01006824 .used_streams = h2_used_streams,
Willy Tarreau62f52692017-10-08 23:01:42 +02006825 .shutr = h2_shutr,
6826 .shutw = h2_shutw,
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02006827 .ctl = h2_ctl,
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006828 .show_fd = h2_show_fd,
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006829 .takeover = h2_takeover,
Christopher Fauleta4600572021-03-08 15:28:28 +01006830 .flags = MX_FL_CLEAN_ABRT|MX_FL_HTX|MX_FL_HOL_RISK|MX_FL_NO_UPG,
Willy Tarreau62f52692017-10-08 23:01:42 +02006831 .name = "H2",
6832};
6833
Christopher Faulet32f61c02018-04-10 14:33:41 +02006834static struct mux_proto_list mux_proto_h2 =
Christopher Fauletc985f6c2019-07-15 11:42:52 +02006835 { .token = IST("h2"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BOTH, .mux = &h2_ops };
Willy Tarreau62f52692017-10-08 23:01:42 +02006836
Willy Tarreau0108d902018-11-25 19:14:37 +01006837INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2);
6838
Willy Tarreau62f52692017-10-08 23:01:42 +02006839/* config keyword parsers */
6840static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006841 { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size },
Willy Tarreaue6baec02017-07-27 11:45:11 +02006842 { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size },
Willy Tarreau5242ef82017-07-27 11:47:28 +02006843 { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006844 { CFG_GLOBAL, "tune.h2.max-frame-size", h2_parse_max_frame_size },
Willy Tarreau62f52692017-10-08 23:01:42 +02006845 { 0, NULL, NULL }
6846}};
6847
Willy Tarreau0108d902018-11-25 19:14:37 +01006848INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
Willy Tarreau2bdcc702020-05-19 11:31:11 +02006849
6850/* initialize internal structs after the config is parsed.
6851 * Returns zero on success, non-zero on error.
6852 */
6853static int init_h2()
6854{
6855 pool_head_hpack_tbl = create_pool("hpack_tbl",
6856 h2_settings_header_table_size,
6857 MEM_F_SHARED|MEM_F_EXACT);
Christopher Faulet52140992020-11-06 15:23:39 +01006858 if (!pool_head_hpack_tbl) {
6859 ha_alert("failed to allocate hpack_tbl memory pool\n");
6860 return (ERR_ALERT | ERR_FATAL);
6861 }
6862 return ERR_NONE;
Willy Tarreau2bdcc702020-05-19 11:31:11 +02006863}
6864
6865REGISTER_POST_CHECK(init_h2);