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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 Tarreau63617db2021-10-06 18:23:40 +020014#include <import/ebmbtree.h>
Willy Tarreau4c7e4b72020-05-27 12:58:42 +020015#include <haproxy/api.h>
Willy Tarreau6be78492020-06-05 00:00:29 +020016#include <haproxy/cfgparse.h>
Willy Tarreau7ea393d2020-06-04 18:02:10 +020017#include <haproxy/connection.h>
Willy Tarreaubf073142020-06-03 12:04:01 +020018#include <haproxy/h2.h>
Willy Tarreaube327fa2020-06-03 09:09:57 +020019#include <haproxy/hpack-dec.h>
20#include <haproxy/hpack-enc.h>
21#include <haproxy/hpack-tbl.h>
Willy Tarreau87735332020-06-04 09:08:41 +020022#include <haproxy/http_htx.h>
Willy Tarreau16f958c2020-06-03 08:44:35 +020023#include <haproxy/htx.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020024#include <haproxy/istbuf.h>
Willy Tarreau36979d92020-06-05 17:27:29 +020025#include <haproxy/log.h>
Willy Tarreau6131d6a2020-06-02 16:48:09 +020026#include <haproxy/net_helper.h>
Willy Tarreau48d25b32020-06-04 18:58:52 +020027#include <haproxy/session-t.h>
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +010028#include <haproxy/stats.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020029#include <haproxy/stream.h>
Willy Tarreau5e539c92020-06-04 20:45:39 +020030#include <haproxy/stream_interface.h>
Willy Tarreauc6d61d72020-06-04 19:02:42 +020031#include <haproxy/trace.h>
Willy Tarreau62f52692017-10-08 23:01:42 +020032
33
Willy Tarreauecb9dcd2019-01-03 12:00:17 +010034/* dummy streams returned for closed, error, refused, idle and states */
Willy Tarreau2a856182017-05-16 15:20:39 +020035static const struct h2s *h2_closed_stream;
Willy Tarreauecb9dcd2019-01-03 12:00:17 +010036static const struct h2s *h2_error_stream;
Willy Tarreau8d0d58b2018-12-23 18:29:12 +010037static const struct h2s *h2_refused_stream;
Willy Tarreau2a856182017-05-16 15:20:39 +020038static const struct h2s *h2_idle_stream;
39
Willy Tarreau5ab6b572017-09-22 08:05:00 +020040/* Connection flags (32 bit), in h2c->flags */
41#define H2_CF_NONE 0x00000000
42
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020043/* Flags indicating why writing to the mux is blocked. */
44#define H2_CF_MUX_MALLOC 0x00000001 // mux blocked on lack of connection's mux buffer
45#define H2_CF_MUX_MFULL 0x00000002 // mux blocked on connection's mux buffer full
46#define H2_CF_MUX_BLOCK_ANY 0x00000003 // aggregate of the mux flags above
47
Willy Tarreau315d8072017-12-10 22:17:57 +010048/* Flags indicating why writing to the demux is blocked.
49 * The first two ones directly affect the ability for the mux to receive data
50 * from the connection. The other ones affect the mux's ability to demux
51 * received data.
52 */
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020053#define H2_CF_DEM_DALLOC 0x00000004 // demux blocked on lack of connection's demux buffer
54#define H2_CF_DEM_DFULL 0x00000008 // demux blocked on connection's demux buffer full
Willy Tarreau315d8072017-12-10 22:17:57 +010055
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020056#define H2_CF_DEM_MBUSY 0x00000010 // demux blocked on connection's mux side busy
57#define H2_CF_DEM_MROOM 0x00000020 // demux blocked on lack of room in mux buffer
58#define H2_CF_DEM_SALLOC 0x00000040 // demux blocked on lack of stream's request buffer
59#define H2_CF_DEM_SFULL 0x00000080 // demux blocked on stream request buffer full
Willy Tarreauf2101912018-07-19 10:11:38 +020060#define H2_CF_DEM_TOOMANY 0x00000100 // demux blocked waiting for some conn_streams to leave
61#define H2_CF_DEM_BLOCK_ANY 0x000001F0 // aggregate of the demux flags above except DALLOC/DFULL
Christopher Fauletb5f7b522021-07-26 12:06:53 +020062 // (SHORT_READ is also excluded)
63
64#define H2_CF_DEM_SHORT_READ 0x00080200 // demux blocked on incomplete frame
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020065
Willy Tarreau081d4722017-05-16 21:51:05 +020066/* other flags */
Willy Tarreauf2101912018-07-19 10:11:38 +020067#define H2_CF_GOAWAY_SENT 0x00001000 // a GOAWAY frame was successfully sent
68#define H2_CF_GOAWAY_FAILED 0x00002000 // a GOAWAY frame failed to be sent
69#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 +020070#define H2_CF_IS_BACK 0x00008000 // this is an outgoing connection
Willy Tarreau3d4631f2021-01-20 10:53:13 +010071#define H2_CF_WINDOW_OPENED 0x00010000 // demux increased window already advertised
72#define H2_CF_RCVD_SHUT 0x00020000 // a recv() attempt already failed on a shutdown
73#define H2_CF_END_REACHED 0x00040000 // pending data too short with RCVD_SHUT present
Willy Tarreau081d4722017-05-16 21:51:05 +020074
Amaury Denoyelle0df04362021-10-18 09:43:29 +020075#define H2_CF_RCVD_RFC8441 0x00100000 // settings from RFC8441 has been received indicating support for Extended CONNECT
76
Willy Tarreau5ab6b572017-09-22 08:05:00 +020077/* H2 connection state, in h2c->st0 */
78enum h2_cs {
79 H2_CS_PREFACE, // init done, waiting for connection preface
80 H2_CS_SETTINGS1, // preface OK, waiting for first settings frame
81 H2_CS_FRAME_H, // first settings frame ok, waiting for frame header
82 H2_CS_FRAME_P, // frame header OK, waiting for frame payload
Willy Tarreaua20a5192017-12-27 11:02:06 +010083 H2_CS_FRAME_A, // frame payload OK, trying to send ACK frame
84 H2_CS_FRAME_E, // frame payload OK, trying to send RST frame
Willy Tarreau5ab6b572017-09-22 08:05:00 +020085 H2_CS_ERROR, // send GOAWAY(errcode) and close the connection ASAP
86 H2_CS_ERROR2, // GOAWAY(errcode) sent, close the connection ASAP
87 H2_CS_ENTRIES // must be last
88} __attribute__((packed));
89
Willy Tarreau51330962019-05-26 09:38:07 +020090
Willy Tarreau9c218e72019-05-26 10:08:28 +020091/* 32 buffers: one for the ring's root, rest for the mbuf itself */
92#define H2C_MBUF_CNT 32
Willy Tarreau51330962019-05-26 09:38:07 +020093
Willy Tarreau5ab6b572017-09-22 08:05:00 +020094/* H2 connection descriptor */
95struct h2c {
96 struct connection *conn;
97
98 enum h2_cs st0; /* mux state */
99 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
100
101 /* 16 bit hole here */
102 uint32_t flags; /* connection flags: H2_CF_* */
Willy Tarreau2e2083a2019-01-31 10:34:07 +0100103 uint32_t streams_limit; /* maximum number of concurrent streams the peer supports */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200104 int32_t max_id; /* highest ID known on this connection, <0 before preface */
105 uint32_t rcvd_c; /* newly received data to ACK for the connection */
106 uint32_t rcvd_s; /* newly received data to ACK for the current stream (dsi) */
107
108 /* states for the demux direction */
109 struct hpack_dht *ddht; /* demux dynamic header table */
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200110 struct buffer dbuf; /* demux buffer */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200111
112 int32_t dsi; /* demux stream ID (<0 = idle) */
113 int32_t dfl; /* demux frame length (if dsi >= 0) */
114 int8_t dft; /* demux frame type (if dsi >= 0) */
115 int8_t dff; /* demux frame flags (if dsi >= 0) */
Willy Tarreau05e5daf2017-12-11 15:17:36 +0100116 uint8_t dpl; /* demux pad length (part of dfl), init to 0 */
117 /* 8 bit hole here */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200118 int32_t last_sid; /* last processed stream ID for GOAWAY, <0 before preface */
119
120 /* states for the mux direction */
Willy Tarreau51330962019-05-26 09:38:07 +0200121 struct buffer mbuf[H2C_MBUF_CNT]; /* mux buffers (ring) */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200122 int32_t msi; /* mux stream ID (<0 = idle) */
123 int32_t mfl; /* mux frame length (if dsi >= 0) */
124 int8_t mft; /* mux frame type (if dsi >= 0) */
125 int8_t mff; /* mux frame flags (if dsi >= 0) */
126 /* 16 bit hole here */
127 int32_t miw; /* mux initial window size for all new streams */
128 int32_t mws; /* mux window size. Can be negative. */
129 int32_t mfs; /* mux's max frame size */
130
Willy Tarreauea392822017-10-31 10:02:25 +0100131 int timeout; /* idle timeout duration in ticks */
Willy Tarreau599391a2017-11-24 10:16:00 +0100132 int shut_timeout; /* idle timeout duration in ticks after GOAWAY was sent */
Willy Tarreau49745612017-12-03 18:56:02 +0100133 unsigned int nb_streams; /* number of streams in the tree */
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200134 unsigned int nb_cs; /* number of attached conn_streams */
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100135 unsigned int nb_reserved; /* number of reserved streams */
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100136 unsigned int stream_cnt; /* total number of streams seen */
Willy Tarreau0b37d652018-10-03 10:33:02 +0200137 struct proxy *proxy; /* the proxy this connection was created for */
Willy Tarreauea392822017-10-31 10:02:25 +0100138 struct task *task; /* timeout management task */
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100139 struct h2_counters *px_counters; /* h2 counters attached to proxy */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200140 struct eb_root streams_by_id; /* all active streams by their ID */
141 struct list send_list; /* list of blocked streams requesting to send */
142 struct list fctl_list; /* list of streams blocked by connection's fctl */
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200143 struct list blocked_list; /* list of streams blocked for other reasons (e.g. sfctl, dep) */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100144 struct buffer_wait buf_wait; /* wait list for buffer allocations */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200145 struct wait_event wait_event; /* To be used if we're waiting for I/Os */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200146};
147
Willy Tarreau18312642017-10-11 07:57:07 +0200148/* H2 stream state, in h2s->st */
149enum h2_ss {
150 H2_SS_IDLE = 0, // idle
151 H2_SS_RLOC, // reserved(local)
152 H2_SS_RREM, // reserved(remote)
153 H2_SS_OPEN, // open
154 H2_SS_HREM, // half-closed(remote)
155 H2_SS_HLOC, // half-closed(local)
Willy Tarreau96060ba2017-10-16 18:34:34 +0200156 H2_SS_ERROR, // an error needs to be sent using RST_STREAM
Willy Tarreau18312642017-10-11 07:57:07 +0200157 H2_SS_CLOSED, // closed
158 H2_SS_ENTRIES // must be last
159} __attribute__((packed));
160
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200161#define H2_SS_MASK(state) (1UL << (state))
162#define H2_SS_IDLE_BIT (1UL << H2_SS_IDLE)
163#define H2_SS_RLOC_BIT (1UL << H2_SS_RLOC)
164#define H2_SS_RREM_BIT (1UL << H2_SS_RREM)
165#define H2_SS_OPEN_BIT (1UL << H2_SS_OPEN)
166#define H2_SS_HREM_BIT (1UL << H2_SS_HREM)
167#define H2_SS_HLOC_BIT (1UL << H2_SS_HLOC)
168#define H2_SS_ERROR_BIT (1UL << H2_SS_ERROR)
169#define H2_SS_CLOSED_BIT (1UL << H2_SS_CLOSED)
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200170
Willy Tarreau18312642017-10-11 07:57:07 +0200171/* HTTP/2 stream flags (32 bit), in h2s->flags */
172#define H2_SF_NONE 0x00000000
173#define H2_SF_ES_RCVD 0x00000001
174#define H2_SF_ES_SENT 0x00000002
175
176#define H2_SF_RST_RCVD 0x00000004 // received RST_STREAM
177#define H2_SF_RST_SENT 0x00000008 // sent RST_STREAM
178
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200179/* stream flags indicating the reason the stream is blocked */
180#define H2_SF_BLK_MBUSY 0x00000010 // blocked waiting for mux access (transient)
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200181#define H2_SF_BLK_MROOM 0x00000020 // blocked waiting for room in the mux (must be in send list)
182#define H2_SF_BLK_MFCTL 0x00000040 // blocked due to mux fctl (must be in fctl list)
183#define H2_SF_BLK_SFCTL 0x00000080 // blocked due to stream fctl (must be in blocked list)
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200184#define H2_SF_BLK_ANY 0x000000F0 // any of the reasons above
185
Willy Tarreau454f9052017-10-26 19:40:35 +0200186/* stream flags indicating how data is supposed to be sent */
187#define H2_SF_DATA_CLEN 0x00000100 // data sent using content-length
Christopher Faulet7d247f02020-12-02 14:26:36 +0100188#define H2_SF_BODYLESS_RESP 0x00000200 /* Bodyless response message */
Christopher Fauletd0db4232021-01-22 11:46:30 +0100189#define H2_SF_BODY_TUNNEL 0x00000400 // Attempt to establish a Tunnelled stream (the result depends on the status code)
190
Willy Tarreau454f9052017-10-26 19:40:35 +0200191
Willy Tarreaud9464162020-01-10 18:25:07 +0100192#define H2_SF_NOTIFIED 0x00000800 // a paused stream was notified to try to send again
Willy Tarreau67434202017-11-06 20:20:51 +0100193#define H2_SF_HEADERS_SENT 0x00001000 // a HEADERS frame was sent for this stream
Willy Tarreauc4312d32017-11-07 12:01:53 +0100194#define H2_SF_OUTGOING_DATA 0x00002000 // set whenever we've seen outgoing data
Willy Tarreau67434202017-11-06 20:20:51 +0100195
Willy Tarreau6cc85a52019-01-02 15:49:20 +0100196#define H2_SF_HEADERS_RCVD 0x00004000 // a HEADERS frame was received for this stream
197
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200198#define H2_SF_WANT_SHUTR 0x00008000 // a stream couldn't shutr() (mux full/busy)
199#define H2_SF_WANT_SHUTW 0x00010000 // a stream couldn't shutw() (mux full/busy)
Willy Tarreau3cf69fe2019-05-14 10:44:40 +0200200#define H2_SF_KILL_CONN 0x00020000 // kill the whole connection with this stream
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200201
Amaury Denoyelle5fb48ea2020-12-11 17:53:04 +0100202#define H2_SF_EXT_CONNECT_SENT 0x00040000 // rfc 8441 an Extended CONNECT has been sent
Amaury Denoyelleefe22762020-12-11 17:53:08 +0100203#define H2_SF_EXT_CONNECT_RCVD 0x00080000 // rfc 8441 an Extended CONNECT has been received and parsed
Christopher Fauletd0db4232021-01-22 11:46:30 +0100204
Amaury Denoyelle5fb48ea2020-12-11 17:53:04 +0100205#define H2_SF_TUNNEL_ABRT 0x00100000 // A tunnel attempt was aborted
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200206
Willy Tarreau18312642017-10-11 07:57:07 +0200207/* H2 stream descriptor, describing the stream as it appears in the H2C, and as
Christopher Fauletfafd1b02020-11-03 18:25:52 +0100208 * it is being processed in the internal HTTP representation (HTX).
Willy Tarreau18312642017-10-11 07:57:07 +0200209 */
210struct h2s {
211 struct conn_stream *cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +0100212 struct session *sess;
Willy Tarreau18312642017-10-11 07:57:07 +0200213 struct h2c *h2c;
Willy Tarreau18312642017-10-11 07:57:07 +0200214 struct eb32_node by_id; /* place in h2c's streams_by_id */
Willy Tarreau18312642017-10-11 07:57:07 +0200215 int32_t id; /* stream ID */
216 uint32_t flags; /* H2_SF_* */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +0200217 int sws; /* stream window size, to be added to the mux's initial window size */
Willy Tarreau18312642017-10-11 07:57:07 +0200218 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
219 enum h2_ss st;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +0200220 uint16_t status; /* HTTP response status */
Willy Tarreau1915ca22019-01-24 11:49:37 +0100221 unsigned long long body_len; /* remaining body length according to content-length if H2_SF_DATA_CLEN */
Olivier Houchard638b7992018-08-16 15:41:52 +0200222 struct buffer rxbuf; /* receive buffer, always valid (buf_empty or real buffer) */
Willy Tarreauf96508a2020-01-10 11:12:48 +0100223 struct wait_event *subs; /* recv wait_event the conn_stream associated is waiting on (via h2_subscribe) */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200224 struct list list; /* To be used when adding in h2c->send_list or h2c->fctl_lsit */
Willy Tarreau5723f292020-01-10 15:16:57 +0100225 struct tasklet *shut_tl; /* deferred shutdown tasklet, to retry to send an RST after we failed to,
226 * in case there's no other subscription to do it */
Amaury Denoyelle74162742020-12-11 17:53:05 +0100227
228 char upgrade_protocol[16]; /* rfc 8441: requested protocol on Extended CONNECT */
Willy Tarreau18312642017-10-11 07:57:07 +0200229};
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200230
Willy Tarreauc6405142017-09-21 20:23:50 +0200231/* descriptor for an h2 frame header */
232struct h2_fh {
233 uint32_t len; /* length, host order, 24 bits */
234 uint32_t sid; /* stream id, host order, 31 bits */
235 uint8_t ft; /* frame type */
236 uint8_t ff; /* frame flags */
237};
238
Willy Tarreau12ae2122019-08-08 18:23:12 +0200239/* trace source and events */
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200240static void h2_trace(enum trace_level level, uint64_t mask, \
241 const struct trace_source *src,
242 const struct ist where, const struct ist func,
243 const void *a1, const void *a2, const void *a3, const void *a4);
Willy Tarreau12ae2122019-08-08 18:23:12 +0200244
245/* The event representation is split like this :
246 * strm - application layer
247 * h2s - internal H2 stream
248 * h2c - internal H2 connection
249 * conn - external connection
250 *
251 */
252static const struct trace_event h2_trace_events[] = {
253#define H2_EV_H2C_NEW (1ULL << 0)
Willy Tarreau87951942019-08-30 07:34:36 +0200254 { .mask = H2_EV_H2C_NEW, .name = "h2c_new", .desc = "new H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200255#define H2_EV_H2C_RECV (1ULL << 1)
Willy Tarreau87951942019-08-30 07:34:36 +0200256 { .mask = H2_EV_H2C_RECV, .name = "h2c_recv", .desc = "Rx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200257#define H2_EV_H2C_SEND (1ULL << 2)
Willy Tarreau87951942019-08-30 07:34:36 +0200258 { .mask = H2_EV_H2C_SEND, .name = "h2c_send", .desc = "Tx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200259#define H2_EV_H2C_FCTL (1ULL << 3)
Willy Tarreau87951942019-08-30 07:34:36 +0200260 { .mask = H2_EV_H2C_FCTL, .name = "h2c_fctl", .desc = "H2 connection flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200261#define H2_EV_H2C_BLK (1ULL << 4)
Willy Tarreau87951942019-08-30 07:34:36 +0200262 { .mask = H2_EV_H2C_BLK, .name = "h2c_blk", .desc = "H2 connection blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200263#define H2_EV_H2C_WAKE (1ULL << 5)
Willy Tarreau87951942019-08-30 07:34:36 +0200264 { .mask = H2_EV_H2C_WAKE, .name = "h2c_wake", .desc = "H2 connection woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200265#define H2_EV_H2C_END (1ULL << 6)
Willy Tarreau87951942019-08-30 07:34:36 +0200266 { .mask = H2_EV_H2C_END, .name = "h2c_end", .desc = "H2 connection terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200267#define H2_EV_H2C_ERR (1ULL << 7)
Willy Tarreau87951942019-08-30 07:34:36 +0200268 { .mask = H2_EV_H2C_ERR, .name = "h2c_err", .desc = "error on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200269#define H2_EV_RX_FHDR (1ULL << 8)
Willy Tarreau87951942019-08-30 07:34:36 +0200270 { .mask = H2_EV_RX_FHDR, .name = "rx_fhdr", .desc = "H2 frame header received" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200271#define H2_EV_RX_FRAME (1ULL << 9)
Willy Tarreau87951942019-08-30 07:34:36 +0200272 { .mask = H2_EV_RX_FRAME, .name = "rx_frame", .desc = "receipt of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200273#define H2_EV_RX_EOI (1ULL << 10)
Willy Tarreau87951942019-08-30 07:34:36 +0200274 { .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 +0200275#define H2_EV_RX_PREFACE (1ULL << 11)
Willy Tarreau87951942019-08-30 07:34:36 +0200276 { .mask = H2_EV_RX_PREFACE, .name = "rx_preface", .desc = "receipt of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200277#define H2_EV_RX_DATA (1ULL << 12)
Willy Tarreau87951942019-08-30 07:34:36 +0200278 { .mask = H2_EV_RX_DATA, .name = "rx_data", .desc = "receipt of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200279#define H2_EV_RX_HDR (1ULL << 13)
Willy Tarreau87951942019-08-30 07:34:36 +0200280 { .mask = H2_EV_RX_HDR, .name = "rx_hdr", .desc = "receipt of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200281#define H2_EV_RX_PRIO (1ULL << 14)
Willy Tarreau87951942019-08-30 07:34:36 +0200282 { .mask = H2_EV_RX_PRIO, .name = "rx_prio", .desc = "receipt of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200283#define H2_EV_RX_RST (1ULL << 15)
Willy Tarreau87951942019-08-30 07:34:36 +0200284 { .mask = H2_EV_RX_RST, .name = "rx_rst", .desc = "receipt of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200285#define H2_EV_RX_SETTINGS (1ULL << 16)
Willy Tarreau87951942019-08-30 07:34:36 +0200286 { .mask = H2_EV_RX_SETTINGS, .name = "rx_settings", .desc = "receipt of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200287#define H2_EV_RX_PUSH (1ULL << 17)
Willy Tarreau87951942019-08-30 07:34:36 +0200288 { .mask = H2_EV_RX_PUSH, .name = "rx_push", .desc = "receipt of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200289#define H2_EV_RX_PING (1ULL << 18)
Willy Tarreau87951942019-08-30 07:34:36 +0200290 { .mask = H2_EV_RX_PING, .name = "rx_ping", .desc = "receipt of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200291#define H2_EV_RX_GOAWAY (1ULL << 19)
Willy Tarreau87951942019-08-30 07:34:36 +0200292 { .mask = H2_EV_RX_GOAWAY, .name = "rx_goaway", .desc = "receipt of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200293#define H2_EV_RX_WU (1ULL << 20)
Willy Tarreau87951942019-08-30 07:34:36 +0200294 { .mask = H2_EV_RX_WU, .name = "rx_wu", .desc = "receipt of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200295#define H2_EV_RX_CONT (1ULL << 21)
Willy Tarreau87951942019-08-30 07:34:36 +0200296 { .mask = H2_EV_RX_CONT, .name = "rx_cont", .desc = "receipt of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200297#define H2_EV_TX_FRAME (1ULL << 22)
Willy Tarreau87951942019-08-30 07:34:36 +0200298 { .mask = H2_EV_TX_FRAME, .name = "tx_frame", .desc = "transmission of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200299#define H2_EV_TX_EOI (1ULL << 23)
Willy Tarreau87951942019-08-30 07:34:36 +0200300 { .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 +0200301#define H2_EV_TX_PREFACE (1ULL << 24)
Willy Tarreau87951942019-08-30 07:34:36 +0200302 { .mask = H2_EV_TX_PREFACE, .name = "tx_preface", .desc = "transmission of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200303#define H2_EV_TX_DATA (1ULL << 25)
Willy Tarreau87951942019-08-30 07:34:36 +0200304 { .mask = H2_EV_TX_DATA, .name = "tx_data", .desc = "transmission of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200305#define H2_EV_TX_HDR (1ULL << 26)
Willy Tarreau87951942019-08-30 07:34:36 +0200306 { .mask = H2_EV_TX_HDR, .name = "tx_hdr", .desc = "transmission of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200307#define H2_EV_TX_PRIO (1ULL << 27)
Willy Tarreau87951942019-08-30 07:34:36 +0200308 { .mask = H2_EV_TX_PRIO, .name = "tx_prio", .desc = "transmission of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200309#define H2_EV_TX_RST (1ULL << 28)
Willy Tarreau87951942019-08-30 07:34:36 +0200310 { .mask = H2_EV_TX_RST, .name = "tx_rst", .desc = "transmission of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200311#define H2_EV_TX_SETTINGS (1ULL << 29)
Willy Tarreau87951942019-08-30 07:34:36 +0200312 { .mask = H2_EV_TX_SETTINGS, .name = "tx_settings", .desc = "transmission of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200313#define H2_EV_TX_PUSH (1ULL << 30)
Willy Tarreau87951942019-08-30 07:34:36 +0200314 { .mask = H2_EV_TX_PUSH, .name = "tx_push", .desc = "transmission of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200315#define H2_EV_TX_PING (1ULL << 31)
Willy Tarreau87951942019-08-30 07:34:36 +0200316 { .mask = H2_EV_TX_PING, .name = "tx_ping", .desc = "transmission of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200317#define H2_EV_TX_GOAWAY (1ULL << 32)
Willy Tarreau87951942019-08-30 07:34:36 +0200318 { .mask = H2_EV_TX_GOAWAY, .name = "tx_goaway", .desc = "transmission of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200319#define H2_EV_TX_WU (1ULL << 33)
Willy Tarreau87951942019-08-30 07:34:36 +0200320 { .mask = H2_EV_TX_WU, .name = "tx_wu", .desc = "transmission of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200321#define H2_EV_TX_CONT (1ULL << 34)
Willy Tarreau87951942019-08-30 07:34:36 +0200322 { .mask = H2_EV_TX_CONT, .name = "tx_cont", .desc = "transmission of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200323#define H2_EV_H2S_NEW (1ULL << 35)
Willy Tarreau87951942019-08-30 07:34:36 +0200324 { .mask = H2_EV_H2S_NEW, .name = "h2s_new", .desc = "new H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200325#define H2_EV_H2S_RECV (1ULL << 36)
Willy Tarreau87951942019-08-30 07:34:36 +0200326 { .mask = H2_EV_H2S_RECV, .name = "h2s_recv", .desc = "Rx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200327#define H2_EV_H2S_SEND (1ULL << 37)
Willy Tarreau87951942019-08-30 07:34:36 +0200328 { .mask = H2_EV_H2S_SEND, .name = "h2s_send", .desc = "Tx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200329#define H2_EV_H2S_FCTL (1ULL << 38)
Willy Tarreau87951942019-08-30 07:34:36 +0200330 { .mask = H2_EV_H2S_FCTL, .name = "h2s_fctl", .desc = "H2 stream flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200331#define H2_EV_H2S_BLK (1ULL << 39)
Willy Tarreau87951942019-08-30 07:34:36 +0200332 { .mask = H2_EV_H2S_BLK, .name = "h2s_blk", .desc = "H2 stream blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200333#define H2_EV_H2S_WAKE (1ULL << 40)
Willy Tarreau87951942019-08-30 07:34:36 +0200334 { .mask = H2_EV_H2S_WAKE, .name = "h2s_wake", .desc = "H2 stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200335#define H2_EV_H2S_END (1ULL << 41)
Willy Tarreau87951942019-08-30 07:34:36 +0200336 { .mask = H2_EV_H2S_END, .name = "h2s_end", .desc = "H2 stream terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200337#define H2_EV_H2S_ERR (1ULL << 42)
Willy Tarreau87951942019-08-30 07:34:36 +0200338 { .mask = H2_EV_H2S_ERR, .name = "h2s_err", .desc = "error on H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200339#define H2_EV_STRM_NEW (1ULL << 43)
Willy Tarreau87951942019-08-30 07:34:36 +0200340 { .mask = H2_EV_STRM_NEW, .name = "strm_new", .desc = "app-layer stream creation" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200341#define H2_EV_STRM_RECV (1ULL << 44)
Willy Tarreau87951942019-08-30 07:34:36 +0200342 { .mask = H2_EV_STRM_RECV, .name = "strm_recv", .desc = "receiving data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200343#define H2_EV_STRM_SEND (1ULL << 45)
Willy Tarreau87951942019-08-30 07:34:36 +0200344 { .mask = H2_EV_STRM_SEND, .name = "strm_send", .desc = "sending data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200345#define H2_EV_STRM_FULL (1ULL << 46)
Willy Tarreau87951942019-08-30 07:34:36 +0200346 { .mask = H2_EV_STRM_FULL, .name = "strm_full", .desc = "stream buffer full" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200347#define H2_EV_STRM_WAKE (1ULL << 47)
Willy Tarreau87951942019-08-30 07:34:36 +0200348 { .mask = H2_EV_STRM_WAKE, .name = "strm_wake", .desc = "stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200349#define H2_EV_STRM_SHUT (1ULL << 48)
Willy Tarreau87951942019-08-30 07:34:36 +0200350 { .mask = H2_EV_STRM_SHUT, .name = "strm_shut", .desc = "stream shutdown" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200351#define H2_EV_STRM_END (1ULL << 49)
Willy Tarreau87951942019-08-30 07:34:36 +0200352 { .mask = H2_EV_STRM_END, .name = "strm_end", .desc = "detaching app-layer stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200353#define H2_EV_STRM_ERR (1ULL << 50)
Willy Tarreau87951942019-08-30 07:34:36 +0200354 { .mask = H2_EV_STRM_ERR, .name = "strm_err", .desc = "stream error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200355#define H2_EV_PROTO_ERR (1ULL << 51)
Willy Tarreau87951942019-08-30 07:34:36 +0200356 { .mask = H2_EV_PROTO_ERR, .name = "proto_err", .desc = "protocol error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200357 { }
358};
359
360static const struct name_desc h2_trace_lockon_args[4] = {
361 /* arg1 */ { /* already used by the connection */ },
362 /* arg2 */ { .name="h2s", .desc="H2 stream" },
363 /* arg3 */ { },
364 /* arg4 */ { }
365};
366
367static const struct name_desc h2_trace_decoding[] = {
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200368#define H2_VERB_CLEAN 1
369 { .name="clean", .desc="only user-friendly stuff, generally suitable for level \"user\"" },
370#define H2_VERB_MINIMAL 2
Willy Tarreau12ae2122019-08-08 18:23:12 +0200371 { .name="minimal", .desc="report only h2c/h2s state and flags, no real decoding" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200372#define H2_VERB_SIMPLE 3
Willy Tarreau12ae2122019-08-08 18:23:12 +0200373 { .name="simple", .desc="add request/response status line or frame info when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200374#define H2_VERB_ADVANCED 4
Willy Tarreau12ae2122019-08-08 18:23:12 +0200375 { .name="advanced", .desc="add header fields or frame decoding when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200376#define H2_VERB_COMPLETE 5
Willy Tarreau12ae2122019-08-08 18:23:12 +0200377 { .name="complete", .desc="add full data dump when available" },
378 { /* end */ }
379};
380
Willy Tarreau6eb3d372021-04-10 19:29:26 +0200381static struct trace_source trace_h2 __read_mostly = {
Willy Tarreau12ae2122019-08-08 18:23:12 +0200382 .name = IST("h2"),
383 .desc = "HTTP/2 multiplexer",
384 .arg_def = TRC_ARG1_CONN, // TRACE()'s first argument is always a connection
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200385 .default_cb = h2_trace,
Willy Tarreau12ae2122019-08-08 18:23:12 +0200386 .known_events = h2_trace_events,
387 .lockon_args = h2_trace_lockon_args,
388 .decoding = h2_trace_decoding,
389 .report_events = ~0, // report everything by default
390};
391
392#define TRACE_SOURCE &trace_h2
393INITCALL1(STG_REGISTER, trace_register_source, TRACE_SOURCE);
394
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100395/* h2 stats module */
396enum {
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100397 H2_ST_HEADERS_RCVD,
398 H2_ST_DATA_RCVD,
399 H2_ST_SETTINGS_RCVD,
400 H2_ST_RST_STREAM_RCVD,
401 H2_ST_GOAWAY_RCVD,
402
Amaury Denoyellea8879232020-10-27 17:16:03 +0100403 H2_ST_CONN_PROTO_ERR,
404 H2_ST_STRM_PROTO_ERR,
405 H2_ST_RST_STREAM_RESP,
406 H2_ST_GOAWAY_RESP,
407
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100408 H2_ST_OPEN_CONN,
409 H2_ST_OPEN_STREAM,
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100410 H2_ST_TOTAL_CONN,
411 H2_ST_TOTAL_STREAM,
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100412
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100413 H2_STATS_COUNT /* must be the last member of the enum */
414};
415
416static struct name_desc h2_stats[] = {
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100417 [H2_ST_HEADERS_RCVD] = { .name = "h2_headers_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100418 .desc = "Total number of received HEADERS frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100419 [H2_ST_DATA_RCVD] = { .name = "h2_data_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100420 .desc = "Total number of received DATA frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100421 [H2_ST_SETTINGS_RCVD] = { .name = "h2_settings_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100422 .desc = "Total number of received SETTINGS frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100423 [H2_ST_RST_STREAM_RCVD] = { .name = "h2_rst_stream_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100424 .desc = "Total number of received RST_STREAM frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100425 [H2_ST_GOAWAY_RCVD] = { .name = "h2_goaway_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100426 .desc = "Total number of received GOAWAY frames" },
Amaury Denoyellea8879232020-10-27 17:16:03 +0100427
428 [H2_ST_CONN_PROTO_ERR] = { .name = "h2_detected_conn_protocol_errors",
429 .desc = "Total number of connection protocol errors" },
430 [H2_ST_STRM_PROTO_ERR] = { .name = "h2_detected_strm_protocol_errors",
431 .desc = "Total number of stream protocol errors" },
432 [H2_ST_RST_STREAM_RESP] = { .name = "h2_rst_stream_resp",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100433 .desc = "Total number of RST_STREAM sent on detected error" },
Amaury Denoyellea8879232020-10-27 17:16:03 +0100434 [H2_ST_GOAWAY_RESP] = { .name = "h2_goaway_resp",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100435 .desc = "Total number of GOAWAY sent on detected error" },
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100436
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100437 [H2_ST_OPEN_CONN] = { .name = "h2_open_connections",
438 .desc = "Count of currently open connections" },
439 [H2_ST_OPEN_STREAM] = { .name = "h2_backend_open_streams",
440 .desc = "Count of currently open streams" },
Amaury Denoyelle377d8782021-02-03 16:27:22 +0100441 [H2_ST_TOTAL_CONN] = { .name = "h2_total_connections",
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100442 .desc = "Total number of connections" },
Amaury Denoyelle377d8782021-02-03 16:27:22 +0100443 [H2_ST_TOTAL_STREAM] = { .name = "h2_backend_total_streams",
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100444 .desc = "Total number of streams" },
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100445};
446
447static struct h2_counters {
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100448 long long headers_rcvd; /* total number of HEADERS frame received */
449 long long data_rcvd; /* total number of DATA frame received */
450 long long settings_rcvd; /* total number of SETTINGS frame received */
451 long long rst_stream_rcvd; /* total number of RST_STREAM frame received */
452 long long goaway_rcvd; /* total number of GOAWAY frame received */
Amaury Denoyellea8879232020-10-27 17:16:03 +0100453
454 long long conn_proto_err; /* total number of protocol errors detected */
455 long long strm_proto_err; /* total number of protocol errors detected */
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100456 long long rst_stream_resp; /* total number of RST_STREAM frame sent on error */
457 long long goaway_resp; /* total number of GOAWAY frame sent on error */
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100458
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100459 long long open_conns; /* count of currently open connections */
460 long long open_streams; /* count of currently open streams */
461 long long total_conns; /* total number of connections */
462 long long total_streams; /* total number of streams */
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100463} h2_counters;
464
465static void h2_fill_stats(void *data, struct field *stats)
466{
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100467 struct h2_counters *counters = data;
468
469 stats[H2_ST_HEADERS_RCVD] = mkf_u64(FN_COUNTER, counters->headers_rcvd);
470 stats[H2_ST_DATA_RCVD] = mkf_u64(FN_COUNTER, counters->data_rcvd);
471 stats[H2_ST_SETTINGS_RCVD] = mkf_u64(FN_COUNTER, counters->settings_rcvd);
472 stats[H2_ST_RST_STREAM_RCVD] = mkf_u64(FN_COUNTER, counters->rst_stream_rcvd);
473 stats[H2_ST_GOAWAY_RCVD] = mkf_u64(FN_COUNTER, counters->goaway_rcvd);
Amaury Denoyellea8879232020-10-27 17:16:03 +0100474
475 stats[H2_ST_CONN_PROTO_ERR] = mkf_u64(FN_COUNTER, counters->conn_proto_err);
476 stats[H2_ST_STRM_PROTO_ERR] = mkf_u64(FN_COUNTER, counters->strm_proto_err);
477 stats[H2_ST_RST_STREAM_RESP] = mkf_u64(FN_COUNTER, counters->rst_stream_resp);
478 stats[H2_ST_GOAWAY_RESP] = mkf_u64(FN_COUNTER, counters->goaway_resp);
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100479
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100480 stats[H2_ST_OPEN_CONN] = mkf_u64(FN_GAUGE, counters->open_conns);
481 stats[H2_ST_OPEN_STREAM] = mkf_u64(FN_GAUGE, counters->open_streams);
482 stats[H2_ST_TOTAL_CONN] = mkf_u64(FN_COUNTER, counters->total_conns);
483 stats[H2_ST_TOTAL_STREAM] = mkf_u64(FN_COUNTER, counters->total_streams);
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100484}
485
486static struct stats_module h2_stats_module = {
487 .name = "h2",
488 .fill_stats = h2_fill_stats,
489 .stats = h2_stats,
490 .stats_count = H2_STATS_COUNT,
491 .counters = &h2_counters,
492 .counters_size = sizeof(h2_counters),
493 .domain_flags = MK_STATS_PROXY_DOMAIN(STATS_PX_CAP_FE|STATS_PX_CAP_BE),
494 .clearable = 1,
495};
496
497INITCALL1(STG_REGISTER, stats_register_module, &h2_stats_module);
498
Willy Tarreau8ceae722018-11-26 11:58:30 +0100499/* the h2c connection pool */
500DECLARE_STATIC_POOL(pool_head_h2c, "h2c", sizeof(struct h2c));
501
502/* the h2s stream pool */
503DECLARE_STATIC_POOL(pool_head_h2s, "h2s", sizeof(struct h2s));
504
Willy Tarreaudc572362018-12-12 08:08:05 +0100505/* The default connection window size is 65535, it may only be enlarged using
506 * a WINDOW_UPDATE message. Since the window must never be larger than 2G-1,
507 * we'll pretend we already received the difference between the two to send
508 * an equivalent window update to enlarge it to 2G-1.
509 */
510#define H2_INITIAL_WINDOW_INCREMENT ((1U<<31)-1 - 65535)
511
Willy Tarreau455d5682019-05-24 19:42:18 +0200512/* maximum amount of data we're OK with re-aligning for buffer optimizations */
513#define MAX_DATA_REALIGN 1024
514
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200515/* a few settings from the global section */
516static int h2_settings_header_table_size = 4096; /* initial value */
Willy Tarreaue6baec02017-07-27 11:45:11 +0200517static int h2_settings_initial_window_size = 65535; /* initial value */
Willy Tarreau5a490b62019-01-31 10:39:51 +0100518static unsigned int h2_settings_max_concurrent_streams = 100;
Willy Tarreaua24b35c2019-02-21 13:24:36 +0100519static int h2_settings_max_frame_size = 0; /* unset */
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200520
Willy Tarreau2a856182017-05-16 15:20:39 +0200521/* a dmumy closed stream */
522static const struct h2s *h2_closed_stream = &(const struct h2s){
523 .cs = NULL,
524 .h2c = NULL,
525 .st = H2_SS_CLOSED,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100526 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreauab837502017-12-27 15:07:30 +0100527 .flags = H2_SF_RST_RCVD,
Willy Tarreau2a856182017-05-16 15:20:39 +0200528 .id = 0,
529};
530
Willy Tarreauecb9dcd2019-01-03 12:00:17 +0100531/* a dmumy closed stream returning a PROTOCOL_ERROR error */
532static const struct h2s *h2_error_stream = &(const struct h2s){
533 .cs = NULL,
534 .h2c = NULL,
535 .st = H2_SS_CLOSED,
536 .errcode = H2_ERR_PROTOCOL_ERROR,
537 .flags = 0,
538 .id = 0,
539};
540
Willy Tarreau8d0d58b2018-12-23 18:29:12 +0100541/* a dmumy closed stream returning a REFUSED_STREAM error */
542static const struct h2s *h2_refused_stream = &(const struct h2s){
543 .cs = NULL,
544 .h2c = NULL,
545 .st = H2_SS_CLOSED,
546 .errcode = H2_ERR_REFUSED_STREAM,
547 .flags = 0,
548 .id = 0,
549};
550
Willy Tarreau2a856182017-05-16 15:20:39 +0200551/* and a dummy idle stream for use with any unannounced stream */
552static const struct h2s *h2_idle_stream = &(const struct h2s){
553 .cs = NULL,
554 .h2c = NULL,
555 .st = H2_SS_IDLE,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100556 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreau2a856182017-05-16 15:20:39 +0200557 .id = 0,
558};
559
Willy Tarreau144f84a2021-03-02 16:09:26 +0100560struct task *h2_timeout_task(struct task *t, void *context, unsigned int state);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +0200561static int h2_send(struct h2c *h2c);
562static int h2_recv(struct h2c *h2c);
Olivier Houchard7505f942018-08-21 18:10:44 +0200563static int h2_process(struct h2c *h2c);
Willy Tarreau691d5032021-01-20 14:55:01 +0100564/* h2_io_cb is exported to see it resolved in "show fd" */
Willy Tarreau144f84a2021-03-02 16:09:26 +0100565struct task *h2_io_cb(struct task *t, void *ctx, unsigned int state);
Willy Tarreau0b559072018-02-26 15:22:17 +0100566static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id);
Amaury Denoyelle74162742020-12-11 17:53:05 +0100567static 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 +0100568static int h2_frt_transfer_data(struct h2s *h2s);
Willy Tarreau144f84a2021-03-02 16:09:26 +0100569struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned int state);
Olivier Houchardf502aca2018-12-14 19:42:40 +0100570static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess);
Willy Tarreau8b2757c2018-12-19 17:36:48 +0100571static void h2s_alert(struct h2s *h2s);
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200572
Willy Tarreauab2ec452019-08-30 07:07:08 +0200573/* returns a h2c state as an abbreviated 3-letter string, or "???" if unknown */
574static inline const char *h2c_st_to_str(enum h2_cs st)
575{
576 switch (st) {
577 case H2_CS_PREFACE: return "PRF";
578 case H2_CS_SETTINGS1: return "STG";
579 case H2_CS_FRAME_H: return "FRH";
580 case H2_CS_FRAME_P: return "FRP";
581 case H2_CS_FRAME_A: return "FRA";
582 case H2_CS_FRAME_E: return "FRE";
583 case H2_CS_ERROR: return "ERR";
584 case H2_CS_ERROR2: return "ER2";
585 default: return "???";
586 }
587}
588
589/* returns a h2s state as an abbreviated 3-letter string, or "???" if unknown */
590static inline const char *h2s_st_to_str(enum h2_ss st)
591{
592 switch (st) {
593 case H2_SS_IDLE: return "IDL"; // idle
594 case H2_SS_RLOC: return "RSL"; // reserved local
595 case H2_SS_RREM: return "RSR"; // reserved remote
596 case H2_SS_OPEN: return "OPN"; // open
597 case H2_SS_HREM: return "HCR"; // half-closed remote
598 case H2_SS_HLOC: return "HCL"; // half-closed local
599 case H2_SS_ERROR : return "ERR"; // error
600 case H2_SS_CLOSED: return "CLO"; // closed
601 default: return "???";
602 }
603}
604
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200605/* the H2 traces always expect that arg1, if non-null, is of type connection
606 * (from which we can derive h2c), that arg2, if non-null, is of type h2s, and
607 * that arg3, if non-null, is either of type htx for tx headers, or of type
608 * buffer for everything else.
609 */
610static void h2_trace(enum trace_level level, uint64_t mask, const struct trace_source *src,
611 const struct ist where, const struct ist func,
612 const void *a1, const void *a2, const void *a3, const void *a4)
613{
614 const struct connection *conn = a1;
615 const struct h2c *h2c = conn ? conn->ctx : NULL;
616 const struct h2s *h2s = a2;
617 const struct buffer *buf = a3;
618 const struct htx *htx;
619 int pos;
620
621 if (!h2c) // nothing to add
622 return;
623
Willy Tarreau17104d42019-08-30 07:12:55 +0200624 if (src->verbosity > H2_VERB_CLEAN) {
Willy Tarreau73db4342019-09-25 07:28:44 +0200625 chunk_appendf(&trace_buf, " : h2c=%p(%c,%s)", h2c, conn_is_back(conn) ? 'B' : 'F', h2c_st_to_str(h2c->st0));
626
Willy Tarreau8e6f7492021-06-16 17:47:24 +0200627 if (mask & H2_EV_H2C_NEW) // inside h2_init, otherwise it's hard to match conn & h2c
628 conn_append_debug_info(&trace_buf, conn, " : ");
629
Willy Tarreauf3ce0412019-11-24 14:57:00 +0100630 if (h2c->errcode)
631 chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2c->errcode), h2c->errcode);
632
Willy Tarreau73db4342019-09-25 07:28:44 +0200633 if (h2c->dsi >= 0 &&
634 (mask & (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) == (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) {
Willy Tarreau8520d872020-09-18 07:39:29 +0200635 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 +0200636 }
637
638 if (h2s) {
639 if (h2s->id <= 0)
640 chunk_appendf(&trace_buf, " dsi=%d", h2c->dsi);
641 chunk_appendf(&trace_buf, " h2s=%p(%d,%s)", h2s, h2s->id, h2s_st_to_str(h2s->st));
Willy Tarreauf3ce0412019-11-24 14:57:00 +0100642 if (h2s->id && h2s->errcode)
643 chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2s->errcode), h2s->errcode);
Willy Tarreau73db4342019-09-25 07:28:44 +0200644 }
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200645 }
646
647 /* Let's dump decoded requests and responses right after parsing. They
648 * are traced at level USER with a few recognizable flags.
649 */
650 if ((mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW) ||
651 mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR)) && buf)
652 htx = htxbuf(buf); // recv req/res
653 else if (mask == (H2_EV_TX_FRAME|H2_EV_TX_HDR))
654 htx = a3; // send req/res
655 else
656 htx = NULL;
657
Willy Tarreau94f1dcf2019-08-30 07:11:30 +0200658 if (level == TRACE_LEVEL_USER && src->verbosity != H2_VERB_MINIMAL && htx && (pos = htx_get_head(htx)) != -1) {
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200659 const struct htx_blk *blk = htx_get_blk(htx, pos);
660 const struct htx_sl *sl = htx_get_blk_ptr(htx, blk);
661 enum htx_blk_type type = htx_get_blk_type(blk);
662
663 if (type == HTX_BLK_REQ_SL)
664 chunk_appendf(&trace_buf, " : [%d] H2 REQ: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200665 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200666 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
667 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
668 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
669 else if (type == HTX_BLK_RES_SL)
670 chunk_appendf(&trace_buf, " : [%d] H2 RES: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200671 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200672 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
673 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
674 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
675 }
676}
677
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200678
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100679/* Detect a pending read0 for a H2 connection. It happens if a read0 was
680 * already reported on a previous xprt->rcvbuf() AND a frame parser failed
681 * to parse pending data, confirming no more progress is possible because
682 * we're facing a truncated frame. The function returns 1 to report a read0
683 * or 0 otherwise.
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200684 */
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100685static inline int h2c_read0_pending(struct h2c *h2c)
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200686{
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100687 return !!(h2c->flags & H2_CF_END_REACHED);
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200688}
689
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200690/* returns true if the connection is allowed to expire, false otherwise. A
691 * connection may expire when:
692 * - it has no stream
693 * - it has data in the mux buffer
694 * - it has streams in the blocked list
695 * - it has streams in the fctl list
696 * - it has streams in the send list
697 * Otherwise it means some streams are waiting in the data layer and it should
698 * not expire.
699 */
700static inline int h2c_may_expire(const struct h2c *h2c)
701{
702 return eb_is_empty(&h2c->streams_by_id) ||
703 br_data(h2c->mbuf) ||
704 !LIST_ISEMPTY(&h2c->blocked_list) ||
705 !LIST_ISEMPTY(&h2c->fctl_list) ||
Willy Tarreaud9464162020-01-10 18:25:07 +0100706 !LIST_ISEMPTY(&h2c->send_list);
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200707}
708
Olivier Houchard7a977432019-03-21 15:47:13 +0100709static __inline int
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200710h2c_is_dead(const struct h2c *h2c)
Olivier Houchard7a977432019-03-21 15:47:13 +0100711{
712 if (eb_is_empty(&h2c->streams_by_id) && /* don't close if streams exist */
713 ((h2c->conn->flags & CO_FL_ERROR) || /* errors close immediately */
714 (h2c->st0 >= H2_CS_ERROR && !h2c->task) || /* a timeout stroke earlier */
715 (!(h2c->conn->owner)) || /* Nobody's left to take care of the connection, drop it now */
Willy Tarreau662fafc2019-05-26 09:43:07 +0200716 (!br_data(h2c->mbuf) && /* mux buffer empty, also process clean events below */
Olivier Houchard7a977432019-03-21 15:47:13 +0100717 (conn_xprt_read0_pending(h2c->conn) ||
718 (h2c->last_sid >= 0 && h2c->max_id >= h2c->last_sid)))))
719 return 1;
720
721 return 0;
Olivier Houchard7a977432019-03-21 15:47:13 +0100722}
723
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200724/*****************************************************/
725/* functions below are for dynamic buffer management */
726/*****************************************************/
727
Willy Tarreau315d8072017-12-10 22:17:57 +0100728/* indicates whether or not the we may call the h2_recv() function to attempt
729 * to receive data into the buffer and/or demux pending data. The condition is
730 * a bit complex due to some API limits for now. The rules are the following :
731 * - if an error or a shutdown was detected on the connection and the buffer
732 * is empty, we must not attempt to receive
733 * - if the demux buf failed to be allocated, we must not try to receive and
734 * we know there is nothing pending
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100735 * - if no flag indicates a blocking condition, we may attempt to receive,
736 * regardless of whether the demux buffer is full or not, so that only
737 * de demux part decides whether or not to block. This is needed because
738 * the connection API indeed prevents us from re-enabling receipt that is
739 * already enabled in a polled state, so we must always immediately stop
740 * as soon as the demux can't proceed so as never to hit an end of read
741 * with data pending in the buffers.
Willy Tarreau315d8072017-12-10 22:17:57 +0100742 * - otherwise must may not attempt
743 */
744static inline int h2_recv_allowed(const struct h2c *h2c)
745{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200746 if (b_data(&h2c->dbuf) == 0 &&
Willy Tarreau315d8072017-12-10 22:17:57 +0100747 (h2c->st0 >= H2_CS_ERROR ||
748 h2c->conn->flags & CO_FL_ERROR ||
749 conn_xprt_read0_pending(h2c->conn)))
750 return 0;
751
752 if (!(h2c->flags & H2_CF_DEM_DALLOC) &&
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100753 !(h2c->flags & H2_CF_DEM_BLOCK_ANY))
Willy Tarreau315d8072017-12-10 22:17:57 +0100754 return 1;
755
756 return 0;
757}
758
Willy Tarreau47b515a2018-12-21 16:09:41 +0100759/* restarts reading on the connection if it was not enabled */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200760static inline void h2c_restart_reading(const struct h2c *h2c, int consider_buffer)
Willy Tarreau47b515a2018-12-21 16:09:41 +0100761{
762 if (!h2_recv_allowed(h2c))
763 return;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200764 if ((!consider_buffer || !b_data(&h2c->dbuf))
765 && (h2c->wait_event.events & SUB_RETRY_RECV))
Willy Tarreau47b515a2018-12-21 16:09:41 +0100766 return;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200767 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau47b515a2018-12-21 16:09:41 +0100768}
769
770
Willy Tarreaufa1d3572019-01-31 10:31:51 +0100771/* returns true if the front connection has too many conn_streams attached */
772static inline int h2_frt_has_too_many_cs(const struct h2c *h2c)
Willy Tarreauf2101912018-07-19 10:11:38 +0200773{
Willy Tarreaua8754662018-12-23 20:43:58 +0100774 return h2c->nb_cs > h2_settings_max_concurrent_streams;
Willy Tarreauf2101912018-07-19 10:11:38 +0200775}
776
Willy Tarreau44e973f2018-03-01 17:49:30 +0100777/* Tries to grab a buffer and to re-enable processing on mux <target>. The h2c
778 * flags are used to figure what buffer was requested. It returns 1 if the
779 * allocation succeeds, in which case the connection is woken up, or 0 if it's
780 * impossible to wake up and we prefer to be woken up later.
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200781 */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100782static int h2_buf_available(void *target)
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200783{
784 struct h2c *h2c = target;
Willy Tarreau0b559072018-02-26 15:22:17 +0100785 struct h2s *h2s;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200786
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100787 if ((h2c->flags & H2_CF_DEM_DALLOC) && b_alloc(&h2c->dbuf)) {
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200788 h2c->flags &= ~H2_CF_DEM_DALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200789 h2c_restart_reading(h2c, 1);
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200790 return 1;
791 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200792
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100793 if ((h2c->flags & H2_CF_MUX_MALLOC) && b_alloc(br_tail(h2c->mbuf))) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100794 h2c->flags &= ~H2_CF_MUX_MALLOC;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200795
796 if (h2c->flags & H2_CF_DEM_MROOM) {
797 h2c->flags &= ~H2_CF_DEM_MROOM;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200798 h2c_restart_reading(h2c, 1);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200799 }
Willy Tarreau14398122017-09-22 14:26:04 +0200800 return 1;
801 }
Willy Tarreau0b559072018-02-26 15:22:17 +0100802
803 if ((h2c->flags & H2_CF_DEM_SALLOC) &&
804 (h2s = h2c_st_by_id(h2c, h2c->dsi)) && h2s->cs &&
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100805 b_alloc(&h2s->rxbuf)) {
Willy Tarreau0b559072018-02-26 15:22:17 +0100806 h2c->flags &= ~H2_CF_DEM_SALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200807 h2c_restart_reading(h2c, 1);
Willy Tarreau0b559072018-02-26 15:22:17 +0100808 return 1;
809 }
810
Willy Tarreau14398122017-09-22 14:26:04 +0200811 return 0;
812}
813
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200814static inline struct buffer *h2_get_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200815{
816 struct buffer *buf = NULL;
817
Willy Tarreau2b718102021-04-21 07:32:39 +0200818 if (likely(!LIST_INLIST(&h2c->buf_wait.list)) &&
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100819 unlikely((buf = b_alloc(bptr)) == NULL)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100820 h2c->buf_wait.target = h2c;
821 h2c->buf_wait.wakeup_cb = h2_buf_available;
Willy Tarreaub4e34762021-09-30 19:02:18 +0200822 LIST_APPEND(&th_ctx->buffer_wq, &h2c->buf_wait.list);
Willy Tarreau14398122017-09-22 14:26:04 +0200823 }
824 return buf;
825}
826
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200827static inline void h2_release_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200828{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200829 if (bptr->size) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100830 b_free(bptr);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +0100831 offer_buffers(NULL, 1);
Willy Tarreau14398122017-09-22 14:26:04 +0200832 }
833}
834
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200835static inline void h2_release_mbuf(struct h2c *h2c)
836{
837 struct buffer *buf;
838 unsigned int count = 0;
839
840 while (b_size(buf = br_head_pick(h2c->mbuf))) {
841 b_free(buf);
842 count++;
843 }
844 if (count)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +0100845 offer_buffers(NULL, count);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200846}
847
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100848/* returns the number of allocatable outgoing streams for the connection taking
849 * the last_sid and the reserved ones into account.
850 */
851static inline int h2_streams_left(const struct h2c *h2c)
852{
853 int ret;
854
855 /* consider the number of outgoing streams we're allowed to create before
856 * reaching the last GOAWAY frame seen. max_id is the last assigned id,
857 * nb_reserved is the number of streams which don't yet have an ID.
858 */
859 ret = (h2c->last_sid >= 0) ? h2c->last_sid : 0x7FFFFFFF;
860 ret = (unsigned int)(ret - h2c->max_id) / 2 - h2c->nb_reserved - 1;
861 if (ret < 0)
862 ret = 0;
863 return ret;
864}
865
Willy Tarreau00f18a32019-01-26 12:19:01 +0100866/* returns the number of streams in use on a connection to figure if it's
867 * idle or not. We check nb_cs and not nb_streams as the caller will want
868 * to know if it was the last one after a detach().
869 */
870static int h2_used_streams(struct connection *conn)
871{
872 struct h2c *h2c = conn->ctx;
873
874 return h2c->nb_cs;
875}
876
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100877/* returns the number of concurrent streams available on the connection */
Olivier Houchardd540b362018-11-05 18:37:53 +0100878static int h2_avail_streams(struct connection *conn)
879{
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100880 struct server *srv = objt_server(conn->target);
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100881 struct h2c *h2c = conn->ctx;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100882 int ret1, ret2;
Olivier Houchardd540b362018-11-05 18:37:53 +0100883
Willy Tarreau6afec462019-01-28 06:40:19 +0100884 /* RFC7540#6.8: Receivers of a GOAWAY frame MUST NOT open additional
885 * streams on the connection.
886 */
887 if (h2c->last_sid >= 0)
888 return 0;
889
Willy Tarreauc61966f2019-10-31 15:10:03 +0100890 if (h2c->st0 >= H2_CS_ERROR)
891 return 0;
892
Willy Tarreau86949782019-01-31 10:42:05 +0100893 /* note: may be negative if a SETTINGS frame changes the limit */
894 ret1 = h2c->streams_limit - h2c->nb_streams;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100895
896 /* we must also consider the limit imposed by stream IDs */
897 ret2 = h2_streams_left(h2c);
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100898 ret1 = MIN(ret1, ret2);
Willy Tarreau86949782019-01-31 10:42:05 +0100899 if (ret1 > 0 && srv && srv->max_reuse >= 0) {
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100900 ret2 = h2c->stream_cnt <= srv->max_reuse ? srv->max_reuse - h2c->stream_cnt + 1: 0;
901 ret1 = MIN(ret1, ret2);
902 }
903 return ret1;
Olivier Houchardd540b362018-11-05 18:37:53 +0100904}
905
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200906
Willy Tarreau62f52692017-10-08 23:01:42 +0200907/*****************************************************************/
908/* functions below are dedicated to the mux setup and management */
909/*****************************************************************/
910
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200911/* Initialize the mux once it's attached. For outgoing connections, the context
912 * is already initialized before installing the mux, so we detect incoming
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200913 * connections from the fact that the context is still NULL (even during mux
914 * upgrades). <input> is always used as Input buffer and may contain data. It is
915 * the caller responsibility to not reuse it anymore. Returns < 0 on error.
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200916 */
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200917static int h2_init(struct connection *conn, struct proxy *prx, struct session *sess,
918 struct buffer *input)
Willy Tarreau32218eb2017-09-22 08:07:25 +0200919{
920 struct h2c *h2c;
Willy Tarreauea392822017-10-31 10:02:25 +0100921 struct task *t = NULL;
Christopher Fauletf81ef032019-10-04 15:19:43 +0200922 void *conn_ctx = conn->ctx;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200923
Christopher Fauletf81ef032019-10-04 15:19:43 +0200924 TRACE_ENTER(H2_EV_H2C_NEW);
Willy Tarreau7838a792019-08-12 18:42:03 +0200925
Willy Tarreaubafbe012017-11-24 17:34:44 +0100926 h2c = pool_alloc(pool_head_h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200927 if (!h2c)
mildiscd2d7de2018-10-02 16:44:18 +0200928 goto fail_no_h2c;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200929
Christopher Faulete9b70722019-04-08 10:46:02 +0200930 if (conn_is_back(conn)) {
Willy Tarreau01b44822018-10-03 14:26:37 +0200931 h2c->flags = H2_CF_IS_BACK;
932 h2c->shut_timeout = h2c->timeout = prx->timeout.server;
933 if (tick_isset(prx->timeout.serverfin))
934 h2c->shut_timeout = prx->timeout.serverfin;
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100935
936 h2c->px_counters = EXTRA_COUNTERS_GET(prx->extra_counters_be,
937 &h2_stats_module);
Willy Tarreau01b44822018-10-03 14:26:37 +0200938 } else {
939 h2c->flags = H2_CF_NONE;
940 h2c->shut_timeout = h2c->timeout = prx->timeout.client;
941 if (tick_isset(prx->timeout.clientfin))
942 h2c->shut_timeout = prx->timeout.clientfin;
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100943
944 h2c->px_counters = EXTRA_COUNTERS_GET(prx->extra_counters_fe,
945 &h2_stats_module);
Willy Tarreau01b44822018-10-03 14:26:37 +0200946 }
Willy Tarreau3f133572017-10-31 19:21:06 +0100947
Willy Tarreau0b37d652018-10-03 10:33:02 +0200948 h2c->proxy = prx;
Willy Tarreau33400292017-11-05 11:23:40 +0100949 h2c->task = NULL;
Willy Tarreau3f133572017-10-31 19:21:06 +0100950 if (tick_isset(h2c->timeout)) {
Willy Tarreaubeeabf52021-10-01 18:23:30 +0200951 t = task_new_here();
Willy Tarreau3f133572017-10-31 19:21:06 +0100952 if (!t)
953 goto fail;
954
955 h2c->task = t;
956 t->process = h2_timeout_task;
957 t->context = h2c;
958 t->expire = tick_add(now_ms, h2c->timeout);
959 }
Willy Tarreauea392822017-10-31 10:02:25 +0100960
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200961 h2c->wait_event.tasklet = tasklet_new();
962 if (!h2c->wait_event.tasklet)
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200963 goto fail;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200964 h2c->wait_event.tasklet->process = h2_io_cb;
965 h2c->wait_event.tasklet->context = h2c;
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100966 h2c->wait_event.events = 0;
Amaury Denoyelled3a88c12021-05-03 10:47:51 +0200967 if (!conn_is_back(conn)) {
968 /* Connection might already be in the stopping_list if subject
969 * to h1->h2 upgrade.
970 */
971 if (!LIST_INLIST(&conn->stopping_list)) {
972 LIST_APPEND(&mux_stopping_data[tid].list,
973 &conn->stopping_list);
974 }
975 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200976
Willy Tarreau2bdcc702020-05-19 11:31:11 +0200977 h2c->ddht = hpack_dht_alloc();
Willy Tarreau32218eb2017-09-22 08:07:25 +0200978 if (!h2c->ddht)
979 goto fail;
980
981 /* Initialise the context. */
982 h2c->st0 = H2_CS_PREFACE;
983 h2c->conn = conn;
Willy Tarreau2e2083a2019-01-31 10:34:07 +0100984 h2c->streams_limit = h2_settings_max_concurrent_streams;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200985 h2c->max_id = -1;
986 h2c->errcode = H2_ERR_NO_ERROR;
Willy Tarreau97aaa672018-12-23 09:49:04 +0100987 h2c->rcvd_c = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200988 h2c->rcvd_s = 0;
Willy Tarreau49745612017-12-03 18:56:02 +0100989 h2c->nb_streams = 0;
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200990 h2c->nb_cs = 0;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100991 h2c->nb_reserved = 0;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100992 h2c->stream_cnt = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200993
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200994 h2c->dbuf = *input;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200995 h2c->dsi = -1;
996 h2c->msi = -1;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100997
Willy Tarreau32218eb2017-09-22 08:07:25 +0200998 h2c->last_sid = -1;
999
Willy Tarreau51330962019-05-26 09:38:07 +02001000 br_init(h2c->mbuf, sizeof(h2c->mbuf) / sizeof(h2c->mbuf[0]));
Willy Tarreau32218eb2017-09-22 08:07:25 +02001001 h2c->miw = 65535; /* mux initial window size */
1002 h2c->mws = 65535; /* mux window size */
1003 h2c->mfs = 16384; /* initial max frame size */
Willy Tarreau751f2d02018-10-05 09:35:00 +02001004 h2c->streams_by_id = EB_ROOT;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001005 LIST_INIT(&h2c->send_list);
1006 LIST_INIT(&h2c->fctl_list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +02001007 LIST_INIT(&h2c->blocked_list);
Willy Tarreau90f366b2021-02-20 11:49:49 +01001008 LIST_INIT(&h2c->buf_wait.list);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001009
Christopher Fauletf81ef032019-10-04 15:19:43 +02001010 conn->ctx = h2c;
1011
Willy Tarreau8e6f7492021-06-16 17:47:24 +02001012 TRACE_USER("new H2 connection", H2_EV_H2C_NEW, conn);
1013
Willy Tarreau3f133572017-10-31 19:21:06 +01001014 if (t)
1015 task_queue(t);
Willy Tarreauea392822017-10-31 10:02:25 +01001016
Willy Tarreau01b44822018-10-03 14:26:37 +02001017 if (h2c->flags & H2_CF_IS_BACK) {
1018 /* FIXME: this is temporary, for outgoing connections we need
1019 * to immediately allocate a stream until the code is modified
1020 * so that the caller calls ->attach(). For now the outgoing cs
Christopher Fauletf81ef032019-10-04 15:19:43 +02001021 * is stored as conn->ctx by the caller and saved in conn_ctx.
Willy Tarreau01b44822018-10-03 14:26:37 +02001022 */
1023 struct h2s *h2s;
1024
Christopher Fauletf81ef032019-10-04 15:19:43 +02001025 h2s = h2c_bck_stream_new(h2c, conn_ctx, sess);
Willy Tarreau01b44822018-10-03 14:26:37 +02001026 if (!h2s)
1027 goto fail_stream;
1028 }
1029
Willy Tarreau4781b152021-04-06 13:53:36 +02001030 HA_ATOMIC_INC(&h2c->px_counters->open_conns);
1031 HA_ATOMIC_INC(&h2c->px_counters->total_conns);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001032
Willy Tarreau0f383582018-10-03 14:22:21 +02001033 /* prepare to read something */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02001034 h2c_restart_reading(h2c, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001035 TRACE_LEAVE(H2_EV_H2C_NEW, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001036 return 0;
Willy Tarreau01b44822018-10-03 14:26:37 +02001037 fail_stream:
1038 hpack_dht_free(h2c->ddht);
mildiscd2d7de2018-10-02 16:44:18 +02001039 fail:
Willy Tarreauf6562792019-05-07 19:05:35 +02001040 task_destroy(t);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001041 if (h2c->wait_event.tasklet)
1042 tasklet_free(h2c->wait_event.tasklet);
Willy Tarreaubafbe012017-11-24 17:34:44 +01001043 pool_free(pool_head_h2c, h2c);
mildiscd2d7de2018-10-02 16:44:18 +02001044 fail_no_h2c:
Christopher Fauletf81ef032019-10-04 15:19:43 +02001045 conn->ctx = conn_ctx; /* restore saved ctx */
1046 TRACE_DEVEL("leaving in error", H2_EV_H2C_NEW|H2_EV_H2C_END|H2_EV_H2C_ERR);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001047 return -1;
1048}
1049
Willy Tarreau751f2d02018-10-05 09:35:00 +02001050/* returns the next allocatable outgoing stream ID for the H2 connection, or
1051 * -1 if no more is allocatable.
1052 */
1053static inline int32_t h2c_get_next_sid(const struct h2c *h2c)
1054{
1055 int32_t id = (h2c->max_id + 1) | 1;
Willy Tarreaua80dca82019-01-24 17:08:28 +01001056
1057 if ((id & 0x80000000U) || (h2c->last_sid >= 0 && id > h2c->last_sid))
Willy Tarreau751f2d02018-10-05 09:35:00 +02001058 id = -1;
1059 return id;
1060}
1061
Willy Tarreau2373acc2017-10-12 17:35:14 +02001062/* returns the stream associated with id <id> or NULL if not found */
1063static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id)
1064{
1065 struct eb32_node *node;
1066
Willy Tarreau751f2d02018-10-05 09:35:00 +02001067 if (id == 0)
1068 return (struct h2s *)h2_closed_stream;
1069
Willy Tarreau2a856182017-05-16 15:20:39 +02001070 if (id > h2c->max_id)
1071 return (struct h2s *)h2_idle_stream;
1072
Willy Tarreau2373acc2017-10-12 17:35:14 +02001073 node = eb32_lookup(&h2c->streams_by_id, id);
1074 if (!node)
Willy Tarreau2a856182017-05-16 15:20:39 +02001075 return (struct h2s *)h2_closed_stream;
Willy Tarreau2373acc2017-10-12 17:35:14 +02001076
1077 return container_of(node, struct h2s, by_id);
1078}
1079
Christopher Faulet73c12072019-04-08 11:23:22 +02001080/* release function. This one should be called to free all resources allocated
1081 * to the mux.
Willy Tarreau62f52692017-10-08 23:01:42 +02001082 */
Christopher Faulet73c12072019-04-08 11:23:22 +02001083static void h2_release(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02001084{
William Dauchy477757c2020-08-07 22:19:23 +02001085 struct connection *conn = NULL;
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001086
Willy Tarreau7838a792019-08-12 18:42:03 +02001087 TRACE_ENTER(H2_EV_H2C_END);
1088
Willy Tarreau32218eb2017-09-22 08:07:25 +02001089 if (h2c) {
Christopher Faulet61840e72019-04-15 09:33:32 +02001090 /* The connection must be aattached to this mux to be released */
1091 if (h2c->conn && h2c->conn->ctx == h2c)
1092 conn = h2c->conn;
1093
Willy Tarreau7838a792019-08-12 18:42:03 +02001094 TRACE_DEVEL("freeing h2c", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001095 hpack_dht_free(h2c->ddht);
Willy Tarreau14398122017-09-22 14:26:04 +02001096
Willy Tarreau2b718102021-04-21 07:32:39 +02001097 if (LIST_INLIST(&h2c->buf_wait.list))
Willy Tarreau90f366b2021-02-20 11:49:49 +01001098 LIST_DEL_INIT(&h2c->buf_wait.list);
Willy Tarreau14398122017-09-22 14:26:04 +02001099
Willy Tarreau44e973f2018-03-01 17:49:30 +01001100 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau2e3c0002019-05-26 09:45:23 +02001101 h2_release_mbuf(h2c);
Willy Tarreau44e973f2018-03-01 17:49:30 +01001102
Willy Tarreauea392822017-10-31 10:02:25 +01001103 if (h2c->task) {
Willy Tarreau0975f112018-03-29 15:22:59 +02001104 h2c->task->context = NULL;
1105 task_wakeup(h2c->task, TASK_WOKEN_OTHER);
Willy Tarreauea392822017-10-31 10:02:25 +01001106 h2c->task = NULL;
1107 }
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001108 if (h2c->wait_event.tasklet)
1109 tasklet_free(h2c->wait_event.tasklet);
Christopher Faulet21d849f2019-09-18 11:07:20 +02001110 if (conn && h2c->wait_event.events != 0)
Olivier Houcharde179d0e2019-03-21 18:27:17 +01001111 conn->xprt->unsubscribe(conn, conn->xprt_ctx, h2c->wait_event.events,
Christopher Faulet21d849f2019-09-18 11:07:20 +02001112 &h2c->wait_event);
Willy Tarreauea392822017-10-31 10:02:25 +01001113
Willy Tarreau4781b152021-04-06 13:53:36 +02001114 HA_ATOMIC_DEC(&h2c->px_counters->open_conns);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001115
Willy Tarreaubafbe012017-11-24 17:34:44 +01001116 pool_free(pool_head_h2c, h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001117 }
1118
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001119 if (conn) {
Amaury Denoyelled3a88c12021-05-03 10:47:51 +02001120 if (!conn_is_back(conn))
1121 LIST_DEL_INIT(&conn->stopping_list);
1122
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001123 conn->mux = NULL;
1124 conn->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02001125 TRACE_DEVEL("freeing conn", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001126
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001127 conn_stop_tracking(conn);
Willy Tarreau0b222472021-10-21 22:24:31 +02001128
1129 /* there might be a GOAWAY frame still pending in the TCP
1130 * stack, and if the peer continues to send (i.e. window
1131 * updates etc), this can result in losing the GOAWAY. For
1132 * this reason we try to drain anything received in between.
1133 */
1134 conn->flags |= CO_FL_WANT_DRAIN;
1135
1136 conn_xprt_shutw(conn);
1137 conn_xprt_close(conn);
1138 conn_sock_shutw(conn, !conn_is_back(conn));
1139 conn_ctrl_close(conn);
1140
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001141 if (conn->destroy_cb)
1142 conn->destroy_cb(conn);
1143 conn_free(conn);
1144 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001145
1146 TRACE_LEAVE(H2_EV_H2C_END);
Willy Tarreau62f52692017-10-08 23:01:42 +02001147}
1148
1149
Willy Tarreau71681172017-10-23 14:39:06 +02001150/******************************************************/
1151/* functions below are for the H2 protocol processing */
1152/******************************************************/
1153
1154/* returns the stream if of stream <h2s> or 0 if <h2s> is NULL */
Willy Tarreau1f094672017-11-20 21:27:45 +01001155static inline __maybe_unused int h2s_id(const struct h2s *h2s)
Willy Tarreau71681172017-10-23 14:39:06 +02001156{
1157 return h2s ? h2s->id : 0;
1158}
1159
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001160/* returns the sum of the stream's own window size and the mux's initial
1161 * window, which together form the stream's effective window size.
1162 */
1163static inline int h2s_mws(const struct h2s *h2s)
1164{
1165 return h2s->sws + h2s->h2c->miw;
1166}
1167
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001168/* returns true of the mux is currently busy as seen from stream <h2s> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001169static inline __maybe_unused int h2c_mux_busy(const struct h2c *h2c, const struct h2s *h2s)
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001170{
1171 if (h2c->msi < 0)
1172 return 0;
1173
1174 if (h2c->msi == h2s_id(h2s))
1175 return 0;
1176
1177 return 1;
1178}
1179
Willy Tarreau741d6df2017-10-17 08:00:59 +02001180/* marks an error on the connection */
Willy Tarreau1f094672017-11-20 21:27:45 +01001181static inline __maybe_unused void h2c_error(struct h2c *h2c, enum h2_err err)
Willy Tarreau741d6df2017-10-17 08:00:59 +02001182{
Willy Tarreau022e5e52020-09-10 09:33:15 +02001183 TRACE_POINT(H2_EV_H2C_ERR, h2c->conn, 0, 0, (void *)(long)(err));
Willy Tarreau741d6df2017-10-17 08:00:59 +02001184 h2c->errcode = err;
1185 h2c->st0 = H2_CS_ERROR;
1186}
1187
Willy Tarreau175cebb2019-01-24 10:02:24 +01001188/* marks an error on the stream. It may also update an already closed stream
1189 * (e.g. to report an error after an RST was received).
1190 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001191static inline __maybe_unused void h2s_error(struct h2s *h2s, enum h2_err err)
Willy Tarreau2e43f082017-10-17 08:03:59 +02001192{
Willy Tarreau175cebb2019-01-24 10:02:24 +01001193 if (h2s->id && h2s->st != H2_SS_ERROR) {
Willy Tarreau022e5e52020-09-10 09:33:15 +02001194 TRACE_POINT(H2_EV_H2S_ERR, h2s->h2c->conn, h2s, 0, (void *)(long)(err));
Willy Tarreau2e43f082017-10-17 08:03:59 +02001195 h2s->errcode = err;
Willy Tarreau175cebb2019-01-24 10:02:24 +01001196 if (h2s->st < H2_SS_ERROR)
1197 h2s->st = H2_SS_ERROR;
Willy Tarreauec988c72018-12-19 18:00:29 +01001198 if (h2s->cs)
1199 cs_set_error(h2s->cs);
Willy Tarreau2e43f082017-10-17 08:03:59 +02001200 }
1201}
1202
Willy Tarreau7e094452018-12-19 18:08:52 +01001203/* attempt to notify the data layer of recv availability */
1204static void __maybe_unused h2s_notify_recv(struct h2s *h2s)
1205{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001206 if (h2s->subs && h2s->subs->events & SUB_RETRY_RECV) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001207 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01001208 tasklet_wakeup(h2s->subs->tasklet);
1209 h2s->subs->events &= ~SUB_RETRY_RECV;
1210 if (!h2s->subs->events)
1211 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001212 }
1213}
1214
1215/* attempt to notify the data layer of send availability */
1216static void __maybe_unused h2s_notify_send(struct h2s *h2s)
1217{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001218 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001219 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01001220 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01001221 tasklet_wakeup(h2s->subs->tasklet);
1222 h2s->subs->events &= ~SUB_RETRY_SEND;
1223 if (!h2s->subs->events)
1224 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001225 }
Willy Tarreau5723f292020-01-10 15:16:57 +01001226 else if (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) {
1227 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
1228 tasklet_wakeup(h2s->shut_tl);
1229 }
Willy Tarreau7e094452018-12-19 18:08:52 +01001230}
1231
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001232/* alerts the data layer, trying to wake it up by all means, following
1233 * this sequence :
1234 * - if the h2s' data layer is subscribed to recv, then it's woken up for recv
1235 * - if its subscribed to send, then it's woken up for send
1236 * - if it was subscribed to neither, its ->wake() callback is called
1237 * It is safe to call this function with a closed stream which doesn't have a
1238 * conn_stream anymore.
1239 */
1240static void __maybe_unused h2s_alert(struct h2s *h2s)
1241{
Willy Tarreau7838a792019-08-12 18:42:03 +02001242 TRACE_ENTER(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
1243
Willy Tarreauf96508a2020-01-10 11:12:48 +01001244 if (h2s->subs ||
Willy Tarreau5723f292020-01-10 15:16:57 +01001245 (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW))) {
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001246 h2s_notify_recv(h2s);
1247 h2s_notify_send(h2s);
1248 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001249 else if (h2s->cs && h2s->cs->data_cb->wake != NULL) {
1250 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001251 h2s->cs->data_cb->wake(h2s->cs);
Willy Tarreau7838a792019-08-12 18:42:03 +02001252 }
1253
1254 TRACE_LEAVE(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001255}
1256
Willy Tarreaue4820742017-07-27 13:37:23 +02001257/* writes the 24-bit frame size <len> at address <frame> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001258static inline __maybe_unused void h2_set_frame_size(void *frame, uint32_t len)
Willy Tarreaue4820742017-07-27 13:37:23 +02001259{
1260 uint8_t *out = frame;
1261
1262 *out = len >> 16;
1263 write_n16(out + 1, len);
1264}
1265
Willy Tarreau54c15062017-10-10 17:10:03 +02001266/* reads <bytes> bytes from buffer <b> starting at relative offset <o> from the
1267 * current pointer, dealing with wrapping, and stores the result in <dst>. It's
1268 * the caller's responsibility to verify that there are at least <bytes> bytes
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001269 * available in the buffer's input prior to calling this function. The buffer
1270 * is assumed not to hold any output data.
Willy Tarreau54c15062017-10-10 17:10:03 +02001271 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001272static inline __maybe_unused void h2_get_buf_bytes(void *dst, size_t bytes,
Willy Tarreau54c15062017-10-10 17:10:03 +02001273 const struct buffer *b, int o)
1274{
Willy Tarreau591d4452018-06-15 17:21:00 +02001275 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 +02001276}
1277
Willy Tarreau1f094672017-11-20 21:27:45 +01001278static inline __maybe_unused uint16_t h2_get_n16(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001279{
Willy Tarreau591d4452018-06-15 17:21:00 +02001280 return readv_n16(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001281}
1282
Willy Tarreau1f094672017-11-20 21:27:45 +01001283static inline __maybe_unused uint32_t h2_get_n32(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001284{
Willy Tarreau591d4452018-06-15 17:21:00 +02001285 return readv_n32(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001286}
1287
Willy Tarreau1f094672017-11-20 21:27:45 +01001288static inline __maybe_unused uint64_t h2_get_n64(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001289{
Willy Tarreau591d4452018-06-15 17:21:00 +02001290 return readv_n64(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001291}
1292
1293
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001294/* Peeks an H2 frame header from offset <o> of buffer <b> into descriptor <h>.
1295 * The algorithm is not obvious. It turns out that H2 headers are neither
1296 * aligned nor do they use regular sizes. And to add to the trouble, the buffer
1297 * may wrap so each byte read must be checked. The header is formed like this :
Willy Tarreau715d5312017-07-11 15:20:24 +02001298 *
1299 * b0 b1 b2 b3 b4 b5..b8
1300 * +----------+---------+--------+----+----+----------------------+
1301 * |len[23:16]|len[15:8]|len[7:0]|type|flag|sid[31:0] (big endian)|
1302 * +----------+---------+--------+----+----+----------------------+
1303 *
1304 * Here we read a big-endian 64 bit word from h[1]. This way in a single read
1305 * we get the sid properly aligned and ordered, and 16 bits of len properly
1306 * ordered as well. The type and flags can be extracted using bit shifts from
1307 * the word, and only one extra read is needed to fetch len[16:23].
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001308 * Returns zero if some bytes are missing, otherwise non-zero on success. The
1309 * buffer is assumed not to contain any output data.
Willy Tarreau715d5312017-07-11 15:20:24 +02001310 */
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001311static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, int o, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001312{
1313 uint64_t w;
1314
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001315 if (b_data(b) < o + 9)
Willy Tarreau715d5312017-07-11 15:20:24 +02001316 return 0;
1317
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001318 w = h2_get_n64(b, o + 1);
1319 h->len = *(uint8_t*)b_peek(b, o) << 16;
Willy Tarreau715d5312017-07-11 15:20:24 +02001320 h->sid = w & 0x7FFFFFFF; /* RFC7540#4.1: R bit must be ignored */
1321 h->ff = w >> 32;
1322 h->ft = w >> 40;
1323 h->len += w >> 48;
1324 return 1;
1325}
1326
1327/* skip the next 9 bytes corresponding to the frame header possibly parsed by
1328 * h2_peek_frame_hdr() above.
1329 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001330static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b)
Willy Tarreau715d5312017-07-11 15:20:24 +02001331{
Willy Tarreaue5f12ce2018-06-15 10:28:05 +02001332 b_del(b, 9);
Willy Tarreau715d5312017-07-11 15:20:24 +02001333}
1334
1335/* same as above, automatically advances the buffer on success */
Willy Tarreau1f094672017-11-20 21:27:45 +01001336static inline __maybe_unused int h2_get_frame_hdr(struct buffer *b, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001337{
1338 int ret;
1339
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001340 ret = h2_peek_frame_hdr(b, 0, h);
Willy Tarreau715d5312017-07-11 15:20:24 +02001341 if (ret > 0)
1342 h2_skip_frame_hdr(b);
1343 return ret;
1344}
1345
Willy Tarreaucb985a42019-10-07 16:56:34 +02001346
1347/* try to fragment the headers frame present at the beginning of buffer <b>,
1348 * enforcing a limit of <mfs> bytes per frame. Returns 0 on failure, 1 on
1349 * success. Typical causes of failure include a buffer not large enough to
1350 * add extra frame headers. The existing frame size is read in the current
1351 * frame. Its EH flag will be cleared if CONTINUATION frames need to be added,
1352 * and its length will be adjusted. The stream ID for continuation frames will
1353 * be copied from the initial frame's.
1354 */
1355static int h2_fragment_headers(struct buffer *b, uint32_t mfs)
1356{
1357 size_t remain = b->data - 9;
1358 int extra_frames = (remain - 1) / mfs;
1359 size_t fsize;
1360 char *fptr;
1361 int frame;
1362
1363 if (b->data <= mfs + 9)
1364 return 1;
1365
1366 /* Too large a frame, we need to fragment it using CONTINUATION
1367 * frames. We start from the end and move tails as needed.
1368 */
1369 if (b->data + extra_frames * 9 > b->size)
1370 return 0;
1371
1372 for (frame = extra_frames; frame; frame--) {
1373 fsize = ((remain - 1) % mfs) + 1;
1374 remain -= fsize;
1375
1376 /* move data */
1377 fptr = b->area + 9 + remain + (frame - 1) * 9;
1378 memmove(fptr + 9, b->area + 9 + remain, fsize);
1379 b->data += 9;
1380
1381 /* write new frame header */
1382 h2_set_frame_size(fptr, fsize);
1383 fptr[3] = H2_FT_CONTINUATION;
1384 fptr[4] = (frame == extra_frames) ? H2_F_HEADERS_END_HEADERS : 0;
1385 write_n32(fptr + 5, read_n32(b->area + 5));
1386 }
1387
1388 b->area[4] &= ~H2_F_HEADERS_END_HEADERS;
1389 h2_set_frame_size(b->area, remain);
1390 return 1;
1391}
1392
1393
Willy Tarreau00dd0782018-03-01 16:31:34 +01001394/* marks stream <h2s> as CLOSED and decrement the number of active streams for
1395 * its connection if the stream was not yet closed. Please use this exclusively
1396 * before closing a stream to ensure stream count is well maintained.
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001397 */
Willy Tarreau00dd0782018-03-01 16:31:34 +01001398static inline void h2s_close(struct h2s *h2s)
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001399{
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001400 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001401 TRACE_ENTER(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001402 h2s->h2c->nb_streams--;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001403 if (!h2s->id)
1404 h2s->h2c->nb_reserved--;
Willy Tarreaua27db382019-03-25 18:13:16 +01001405 if (h2s->cs) {
Willy Tarreaua27db382019-03-25 18:13:16 +01001406 if (!(h2s->cs->flags & CS_FL_EOS) && !b_data(&h2s->rxbuf))
1407 h2s_notify_recv(h2s);
1408 }
Willy Tarreau4781b152021-04-06 13:53:36 +02001409 HA_ATOMIC_DEC(&h2s->h2c->px_counters->open_streams);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001410
Willy Tarreau7838a792019-08-12 18:42:03 +02001411 TRACE_LEAVE(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001412 }
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001413 h2s->st = H2_SS_CLOSED;
1414}
1415
Willy Tarreau71049cc2018-03-28 13:56:39 +02001416/* detaches an H2 stream from its H2C and releases it to the H2S pool. */
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001417/* h2s_destroy should only ever be called by the thread that owns the stream,
1418 * that means that a tasklet should be used if we want to destroy the h2s
1419 * from another thread
1420 */
Willy Tarreau71049cc2018-03-28 13:56:39 +02001421static void h2s_destroy(struct h2s *h2s)
Willy Tarreau0a10de62018-03-01 16:27:53 +01001422{
Willy Tarreau7838a792019-08-12 18:42:03 +02001423 struct connection *conn = h2s->h2c->conn;
1424
1425 TRACE_ENTER(H2_EV_H2S_END, conn, h2s);
1426
Willy Tarreau0a10de62018-03-01 16:27:53 +01001427 h2s_close(h2s);
1428 eb32_delete(&h2s->by_id);
Olivier Houchard638b7992018-08-16 15:41:52 +02001429 if (b_size(&h2s->rxbuf)) {
1430 b_free(&h2s->rxbuf);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01001431 offer_buffers(NULL, 1);
Olivier Houchard638b7992018-08-16 15:41:52 +02001432 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001433
1434 if (h2s->subs)
1435 h2s->subs->events = 0;
1436
Joseph Herlantd77575d2018-11-25 10:54:45 -08001437 /* There's no need to explicitly call unsubscribe here, the only
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001438 * reference left would be in the h2c send_list/fctl_list, and if
1439 * we're in it, we're getting out anyway
1440 */
Olivier Houchardd360ac62019-03-22 17:37:16 +01001441 LIST_DEL_INIT(&h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01001442
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001443 /* ditto, calling tasklet_free() here should be ok */
Willy Tarreau5723f292020-01-10 15:16:57 +01001444 tasklet_free(h2s->shut_tl);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001445 pool_free(pool_head_h2s, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001446
1447 TRACE_LEAVE(H2_EV_H2S_END, conn);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001448}
1449
Willy Tarreaua8e49542018-10-03 18:53:55 +02001450/* allocates a new stream <id> for connection <h2c> and adds it into h2c's
1451 * stream tree. In case of error, nothing is added and NULL is returned. The
1452 * causes of errors can be any failed memory allocation. The caller is
1453 * responsible for checking if the connection may support an extra stream
1454 * prior to calling this function.
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001455 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02001456static struct h2s *h2s_new(struct h2c *h2c, int id)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001457{
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001458 struct h2s *h2s;
1459
Willy Tarreau7838a792019-08-12 18:42:03 +02001460 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1461
Willy Tarreaubafbe012017-11-24 17:34:44 +01001462 h2s = pool_alloc(pool_head_h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001463 if (!h2s)
1464 goto out;
1465
Willy Tarreau5723f292020-01-10 15:16:57 +01001466 h2s->shut_tl = tasklet_new();
1467 if (!h2s->shut_tl) {
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001468 pool_free(pool_head_h2s, h2s);
1469 goto out;
1470 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001471 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01001472 h2s->shut_tl->process = h2_deferred_shut;
1473 h2s->shut_tl->context = h2s;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001474 LIST_INIT(&h2s->list);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001475 h2s->h2c = h2c;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001476 h2s->cs = NULL;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001477 h2s->sws = 0;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001478 h2s->flags = H2_SF_NONE;
1479 h2s->errcode = H2_ERR_NO_ERROR;
1480 h2s->st = H2_SS_IDLE;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02001481 h2s->status = 0;
Willy Tarreau1915ca22019-01-24 11:49:37 +01001482 h2s->body_len = 0;
Olivier Houchard638b7992018-08-16 15:41:52 +02001483 h2s->rxbuf = BUF_NULL;
Amaury Denoyelle74162742020-12-11 17:53:05 +01001484 memset(h2s->upgrade_protocol, 0, sizeof(h2s->upgrade_protocol));
Willy Tarreau751f2d02018-10-05 09:35:00 +02001485
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001486 h2s->by_id.key = h2s->id = id;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001487 if (id > 0)
1488 h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001489 else
1490 h2c->nb_reserved++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001491
1492 eb32_insert(&h2c->streams_by_id, &h2s->by_id);
Willy Tarreau49745612017-12-03 18:56:02 +01001493 h2c->nb_streams++;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001494 h2c->stream_cnt++;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001495
Willy Tarreau4781b152021-04-06 13:53:36 +02001496 HA_ATOMIC_INC(&h2c->px_counters->open_streams);
1497 HA_ATOMIC_INC(&h2c->px_counters->total_streams);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001498
Willy Tarreau7838a792019-08-12 18:42:03 +02001499 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001500 return h2s;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001501 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001502 TRACE_DEVEL("leaving in error", H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001503 return NULL;
1504}
1505
1506/* creates a new stream <id> on the h2c connection and returns it, or NULL in
Christopher Faulet7d013e72020-12-15 16:56:50 +01001507 * case of memory allocation error. <input> is used as input buffer for the new
1508 * stream. On success, it is transferred to the stream and the mux is no longer
1509 * responsible of it. On error, <input> is unchanged, thus the mux must still
1510 * take care of it.
Willy Tarreaua8e49542018-10-03 18:53:55 +02001511 */
Amaury Denoyelle90ac6052021-10-18 14:45:49 +02001512static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id, struct buffer *input, uint32_t flags)
Willy Tarreaua8e49542018-10-03 18:53:55 +02001513{
1514 struct session *sess = h2c->conn->owner;
1515 struct conn_stream *cs;
1516 struct h2s *h2s;
1517
Willy Tarreau7838a792019-08-12 18:42:03 +02001518 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1519
Willy Tarreaua8e49542018-10-03 18:53:55 +02001520 if (h2c->nb_streams >= h2_settings_max_concurrent_streams)
1521 goto out;
1522
1523 h2s = h2s_new(h2c, id);
1524 if (!h2s)
1525 goto out;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001526
Christopher Faulet236c93b2020-07-02 09:19:54 +02001527 cs = cs_new(h2c->conn, h2c->conn->target);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001528 if (!cs)
1529 goto out_close;
1530
Olivier Houchard746fb772018-12-15 19:42:00 +01001531 cs->flags |= CS_FL_NOT_FIRST;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001532 h2s->cs = cs;
1533 cs->ctx = h2s;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001534 h2c->nb_cs++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001535
Amaury Denoyelle90ac6052021-10-18 14:45:49 +02001536 /* FIXME wrong analogy between ext-connect and websocket, this need to
1537 * be refine.
1538 */
1539 if (flags & H2_SF_EXT_CONNECT_RCVD)
1540 cs->flags |= CS_FL_WEBSOCKET;
1541
Christopher Faulet7d013e72020-12-15 16:56:50 +01001542 if (stream_create_from_cs(cs, input) < 0)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001543 goto out_free_cs;
1544
Willy Tarreau590a0512018-09-05 11:56:48 +02001545 /* We want the accept date presented to the next stream to be the one
1546 * we have now, the handshake time to be null (since the next stream
1547 * is not delayed by a handshake), and the idle time to count since
1548 * right now.
1549 */
1550 sess->accept_date = date;
1551 sess->tv_accept = now;
1552 sess->t_handshake = 0;
1553
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001554 /* OK done, the stream lives its own life now */
Willy Tarreaufa1d3572019-01-31 10:31:51 +01001555 if (h2_frt_has_too_many_cs(h2c))
Willy Tarreauf2101912018-07-19 10:11:38 +02001556 h2c->flags |= H2_CF_DEM_TOOMANY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001557 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001558 return h2s;
1559
1560 out_free_cs:
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001561 h2c->nb_cs--;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001562 cs_free(cs);
Olivier Houchard58d87f32019-05-29 16:44:17 +02001563 h2s->cs = NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001564 out_close:
Willy Tarreau71049cc2018-03-28 13:56:39 +02001565 h2s_destroy(h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001566 out:
Willy Tarreau45efc072018-10-03 18:27:52 +02001567 sess_log(sess);
Willy Tarreau7838a792019-08-12 18:42:03 +02001568 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreau45efc072018-10-03 18:27:52 +02001569 return NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001570}
1571
Willy Tarreau751f2d02018-10-05 09:35:00 +02001572/* allocates a new stream associated to conn_stream <cs> on the h2c connection
1573 * and returns it, or NULL in case of memory allocation error or if the highest
1574 * possible stream ID was reached.
1575 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01001576static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001577{
1578 struct h2s *h2s = NULL;
1579
Willy Tarreau7838a792019-08-12 18:42:03 +02001580 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1581
Willy Tarreau86949782019-01-31 10:42:05 +01001582 if (h2c->nb_streams >= h2c->streams_limit)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001583 goto out;
1584
Willy Tarreaua80dca82019-01-24 17:08:28 +01001585 if (h2_streams_left(h2c) < 1)
1586 goto out;
1587
Willy Tarreau751f2d02018-10-05 09:35:00 +02001588 /* Defer choosing the ID until we send the first message to create the stream */
1589 h2s = h2s_new(h2c, 0);
1590 if (!h2s)
1591 goto out;
1592
1593 h2s->cs = cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001594 h2s->sess = sess;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001595 cs->ctx = h2s;
1596 h2c->nb_cs++;
1597
Willy Tarreau751f2d02018-10-05 09:35:00 +02001598 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001599 if (likely(h2s))
1600 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
1601 else
1602 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn, h2s);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001603 return h2s;
1604}
1605
Willy Tarreaube5b7152017-09-25 16:25:39 +02001606/* try to send a settings frame on the connection. Returns > 0 on success, 0 if
1607 * it couldn't do anything. It may return an error in h2c. See RFC7540#11.3 for
1608 * the various settings codes.
1609 */
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001610static int h2c_send_settings(struct h2c *h2c)
Willy Tarreaube5b7152017-09-25 16:25:39 +02001611{
1612 struct buffer *res;
1613 char buf_data[100]; // enough for 15 settings
Willy Tarreau83061a82018-07-13 11:56:34 +02001614 struct buffer buf;
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001615 int mfs;
Willy Tarreau7838a792019-08-12 18:42:03 +02001616 int ret = 0;
1617
1618 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001619
1620 if (h2c_mux_busy(h2c, NULL)) {
1621 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001622 goto out;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001623 }
1624
Willy Tarreaube5b7152017-09-25 16:25:39 +02001625 chunk_init(&buf, buf_data, sizeof(buf_data));
1626 chunk_memcpy(&buf,
1627 "\x00\x00\x00" /* length : 0 for now */
1628 "\x04\x00" /* type : 4 (settings), flags : 0 */
1629 "\x00\x00\x00\x00", /* stream ID : 0 */
1630 9);
1631
Willy Tarreau0bbad6b2019-02-26 16:01:52 +01001632 if (h2c->flags & H2_CF_IS_BACK) {
1633 /* send settings_enable_push=0 */
1634 chunk_memcat(&buf, "\x00\x02\x00\x00\x00\x00", 6);
1635 }
1636
Amaury Denoyellebefeae82021-07-09 17:14:30 +02001637 /* rfc 8441 #3 SETTINGS_ENABLE_CONNECT_PROTOCOL=1,
1638 * sent automatically unless disabled in the global config */
1639 if (!(global.tune.options & GTUNE_DISABLE_H2_WEBSOCKET))
1640 chunk_memcat(&buf, "\x00\x08\x00\x00\x00\x01", 6);
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01001641
Willy Tarreaube5b7152017-09-25 16:25:39 +02001642 if (h2_settings_header_table_size != 4096) {
1643 char str[6] = "\x00\x01"; /* header_table_size */
1644
1645 write_n32(str + 2, h2_settings_header_table_size);
1646 chunk_memcat(&buf, str, 6);
1647 }
1648
1649 if (h2_settings_initial_window_size != 65535) {
1650 char str[6] = "\x00\x04"; /* initial_window_size */
1651
1652 write_n32(str + 2, h2_settings_initial_window_size);
1653 chunk_memcat(&buf, str, 6);
1654 }
1655
1656 if (h2_settings_max_concurrent_streams != 0) {
1657 char str[6] = "\x00\x03"; /* max_concurrent_streams */
1658
1659 /* Note: 0 means "unlimited" for haproxy's config but not for
1660 * the protocol, so never send this value!
1661 */
1662 write_n32(str + 2, h2_settings_max_concurrent_streams);
1663 chunk_memcat(&buf, str, 6);
1664 }
1665
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001666 mfs = h2_settings_max_frame_size;
1667 if (mfs > global.tune.bufsize)
1668 mfs = global.tune.bufsize;
1669
1670 if (!mfs)
1671 mfs = global.tune.bufsize;
1672
1673 if (mfs != 16384) {
Willy Tarreaube5b7152017-09-25 16:25:39 +02001674 char str[6] = "\x00\x05"; /* max_frame_size */
1675
1676 /* note: similarly we could also emit MAX_HEADER_LIST_SIZE to
1677 * match bufsize - rewrite size, but at the moment it seems
1678 * that clients don't take care of it.
1679 */
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001680 write_n32(str + 2, mfs);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001681 chunk_memcat(&buf, str, 6);
1682 }
1683
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001684 h2_set_frame_size(buf.area, buf.data - 9);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001685
1686 res = br_tail(h2c->mbuf);
1687 retry:
1688 if (!h2_get_buf(h2c, res)) {
1689 h2c->flags |= H2_CF_MUX_MALLOC;
1690 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001691 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001692 }
1693
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001694 ret = b_istput(res, ist2(buf.area, buf.data));
Willy Tarreaube5b7152017-09-25 16:25:39 +02001695 if (unlikely(ret <= 0)) {
1696 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001697 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1698 goto retry;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001699 h2c->flags |= H2_CF_MUX_MFULL;
1700 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001701 }
1702 else {
1703 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001704 ret = 0;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001705 }
1706 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001707 out:
1708 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001709 return ret;
1710}
1711
Willy Tarreau52eed752017-09-22 15:05:09 +02001712/* Try to receive a connection preface, then upon success try to send our
1713 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1714 * missing data. It may return an error in h2c.
1715 */
1716static int h2c_frt_recv_preface(struct h2c *h2c)
1717{
1718 int ret1;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001719 int ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001720
Willy Tarreau7838a792019-08-12 18:42:03 +02001721 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
1722
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001723 ret1 = b_isteq(&h2c->dbuf, 0, b_data(&h2c->dbuf), ist(H2_CONN_PREFACE));
Willy Tarreau52eed752017-09-22 15:05:09 +02001724
1725 if (unlikely(ret1 <= 0)) {
Christopher Fauletb5f7b522021-07-26 12:06:53 +02001726 if (!ret1)
1727 h2c->flags |= H2_CF_DEM_SHORT_READ;
Amaury Denoyellea8879232020-10-27 17:16:03 +01001728 if (ret1 < 0 || conn_xprt_read0_pending(h2c->conn)) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01001729 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 +02001730 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauee4684f2021-06-17 08:08:48 +02001731 if (b_data(&h2c->dbuf) ||
1732 !(((const struct session *)h2c->conn->owner)->fe->options & PR_O_IGNORE_PRB))
1733 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Amaury Denoyellea8879232020-10-27 17:16:03 +01001734 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001735 ret2 = 0;
1736 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02001737 }
1738
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001739 ret2 = h2c_send_settings(h2c);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001740 if (ret2 > 0)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001741 b_del(&h2c->dbuf, ret1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001742 out:
1743 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001744 return ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001745}
1746
Willy Tarreau01b44822018-10-03 14:26:37 +02001747/* Try to send a connection preface, then upon success try to send our
1748 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1749 * missing data. It may return an error in h2c.
1750 */
1751static int h2c_bck_send_preface(struct h2c *h2c)
1752{
1753 struct buffer *res;
Willy Tarreau7838a792019-08-12 18:42:03 +02001754 int ret = 0;
1755
1756 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02001757
1758 if (h2c_mux_busy(h2c, NULL)) {
1759 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001760 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001761 }
1762
Willy Tarreaubcc45952019-05-26 10:05:50 +02001763 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001764 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001765 if (!h2_get_buf(h2c, res)) {
Willy Tarreau01b44822018-10-03 14:26:37 +02001766 h2c->flags |= H2_CF_MUX_MALLOC;
1767 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001768 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001769 }
1770
1771 if (!b_data(res)) {
1772 /* preface not yet sent */
Willy Tarreau9c218e72019-05-26 10:08:28 +02001773 ret = b_istput(res, ist(H2_CONN_PREFACE));
1774 if (unlikely(ret <= 0)) {
1775 if (!ret) {
1776 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1777 goto retry;
1778 h2c->flags |= H2_CF_MUX_MFULL;
1779 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001780 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001781 }
1782 else {
1783 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001784 ret = 0;
1785 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001786 }
1787 }
Willy Tarreau01b44822018-10-03 14:26:37 +02001788 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001789 ret = h2c_send_settings(h2c);
1790 out:
1791 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
1792 return ret;
Willy Tarreau01b44822018-10-03 14:26:37 +02001793}
1794
Willy Tarreau081d4722017-05-16 21:51:05 +02001795/* try to send a GOAWAY frame on the connection to report an error or a graceful
1796 * shutdown, with h2c->errcode as the error code. Returns > 0 on success or zero
1797 * if nothing was done. It uses h2c->last_sid as the advertised ID, or copies it
1798 * from h2c->max_id if it's not set yet (<0). In case of lack of room to write
1799 * the message, it subscribes the requester (either <h2s> or <h2c>) to future
1800 * notifications. It sets H2_CF_GOAWAY_SENT on success, and H2_CF_GOAWAY_FAILED
1801 * on unrecoverable failure. It will not attempt to send one again in this last
1802 * case so that it is safe to use h2c_error() to report such errors.
1803 */
1804static int h2c_send_goaway_error(struct h2c *h2c, struct h2s *h2s)
1805{
1806 struct buffer *res;
1807 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02001808 int ret = 0;
Willy Tarreau081d4722017-05-16 21:51:05 +02001809
Willy Tarreau7838a792019-08-12 18:42:03 +02001810 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
1811
1812 if (h2c->flags & H2_CF_GOAWAY_FAILED) {
1813 ret = 1; // claim that it worked
1814 goto out;
1815 }
Willy Tarreau081d4722017-05-16 21:51:05 +02001816
1817 if (h2c_mux_busy(h2c, h2s)) {
1818 if (h2s)
1819 h2s->flags |= H2_SF_BLK_MBUSY;
1820 else
1821 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001822 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001823 }
1824
Willy Tarreau9c218e72019-05-26 10:08:28 +02001825 /* len: 8, type: 7, flags: none, sid: 0 */
1826 memcpy(str, "\x00\x00\x08\x07\x00\x00\x00\x00\x00", 9);
1827
1828 if (h2c->last_sid < 0)
1829 h2c->last_sid = h2c->max_id;
1830
1831 write_n32(str + 9, h2c->last_sid);
1832 write_n32(str + 13, h2c->errcode);
1833
Willy Tarreaubcc45952019-05-26 10:05:50 +02001834 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001835 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001836 if (!h2_get_buf(h2c, res)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02001837 h2c->flags |= H2_CF_MUX_MALLOC;
1838 if (h2s)
1839 h2s->flags |= H2_SF_BLK_MROOM;
1840 else
1841 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001842 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001843 }
1844
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001845 ret = b_istput(res, ist2(str, 17));
Willy Tarreau081d4722017-05-16 21:51:05 +02001846 if (unlikely(ret <= 0)) {
1847 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001848 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1849 goto retry;
Willy Tarreau081d4722017-05-16 21:51:05 +02001850 h2c->flags |= H2_CF_MUX_MFULL;
1851 if (h2s)
1852 h2s->flags |= H2_SF_BLK_MROOM;
1853 else
1854 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001855 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001856 }
1857 else {
1858 /* we cannot report this error using GOAWAY, so we mark
1859 * it and claim a success.
1860 */
1861 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1862 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau7838a792019-08-12 18:42:03 +02001863 ret = 1;
1864 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001865 }
1866 }
1867 h2c->flags |= H2_CF_GOAWAY_SENT;
Willy Tarreauf965b2a2020-12-01 10:47:18 +01001868
1869 /* some codes are not for real errors, just attempts to close cleanly */
1870 switch (h2c->errcode) {
1871 case H2_ERR_NO_ERROR:
1872 case H2_ERR_ENHANCE_YOUR_CALM:
1873 case H2_ERR_REFUSED_STREAM:
1874 case H2_ERR_CANCEL:
1875 break;
1876 default:
Willy Tarreau4781b152021-04-06 13:53:36 +02001877 HA_ATOMIC_INC(&h2c->px_counters->goaway_resp);
Willy Tarreauf965b2a2020-12-01 10:47:18 +01001878 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001879 out:
1880 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
Willy Tarreau081d4722017-05-16 21:51:05 +02001881 return ret;
1882}
1883
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001884/* Try to send an RST_STREAM frame on the connection for the indicated stream
1885 * during mux operations. This stream must be valid and cannot be closed
1886 * already. h2s->id will be used for the stream ID and h2s->errcode will be
1887 * used for the error code. h2s->st will be update to H2_SS_CLOSED if it was
1888 * not yet.
1889 *
1890 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1891 * to write the message, it subscribes the stream to future notifications.
1892 */
1893static int h2s_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1894{
1895 struct buffer *res;
1896 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001897 int ret = 0;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001898
Willy Tarreau7838a792019-08-12 18:42:03 +02001899 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
1900
1901 if (!h2s || h2s->st == H2_SS_CLOSED) {
1902 ret = 1;
1903 goto out;
1904 }
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001905
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001906 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1907 * RST_STREAM in response to a RST_STREAM frame.
1908 */
Willy Tarreau231f6162019-08-06 10:01:40 +02001909 if (h2c->dsi == h2s->id && h2c->dft == H2_FT_RST_STREAM) {
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001910 ret = 1;
1911 goto ignore;
1912 }
1913
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001914 if (h2c_mux_busy(h2c, h2s)) {
1915 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001916 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001917 }
1918
Willy Tarreau9c218e72019-05-26 10:08:28 +02001919 /* len: 4, type: 3, flags: none */
1920 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1921 write_n32(str + 5, h2s->id);
1922 write_n32(str + 9, h2s->errcode);
1923
Willy Tarreaubcc45952019-05-26 10:05:50 +02001924 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001925 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001926 if (!h2_get_buf(h2c, res)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001927 h2c->flags |= H2_CF_MUX_MALLOC;
1928 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001929 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001930 }
1931
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001932 ret = b_istput(res, ist2(str, 13));
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001933 if (unlikely(ret <= 0)) {
1934 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001935 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1936 goto retry;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001937 h2c->flags |= H2_CF_MUX_MFULL;
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 else {
1942 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001943 ret = 0;
1944 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001945 }
1946 }
1947
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001948 ignore:
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001949 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001950 h2s_close(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001951 out:
1952 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001953 return ret;
1954}
1955
1956/* Try to send an RST_STREAM frame on the connection for the stream being
1957 * demuxed using h2c->dsi for the stream ID. It will use h2s->errcode as the
Willy Tarreaue6888ff2018-12-23 18:26:26 +01001958 * error code, even if the stream is one of the dummy ones, and will update
1959 * h2s->st to H2_SS_CLOSED if it was not yet.
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001960 *
1961 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1962 * to write the message, it blocks the demuxer and subscribes it to future
Joseph Herlantd77575d2018-11-25 10:54:45 -08001963 * notifications. It's worth mentioning that an RST may even be sent for a
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001964 * closed stream.
Willy Tarreau27a84c92017-10-17 08:10:17 +02001965 */
1966static int h2c_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1967{
1968 struct buffer *res;
1969 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001970 int ret = 0;
1971
1972 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02001973
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001974 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1975 * RST_STREAM in response to a RST_STREAM frame.
1976 */
1977 if (h2c->dft == H2_FT_RST_STREAM) {
1978 ret = 1;
1979 goto ignore;
1980 }
1981
Willy Tarreau27a84c92017-10-17 08:10:17 +02001982 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001983 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001984 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001985 }
1986
Willy Tarreau9c218e72019-05-26 10:08:28 +02001987 /* len: 4, type: 3, flags: none */
1988 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1989
1990 write_n32(str + 5, h2c->dsi);
1991 write_n32(str + 9, h2s->errcode);
1992
Willy Tarreaubcc45952019-05-26 10:05:50 +02001993 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001994 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001995 if (!h2_get_buf(h2c, res)) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02001996 h2c->flags |= H2_CF_MUX_MALLOC;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001997 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001998 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001999 }
2000
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002001 ret = b_istput(res, ist2(str, 13));
Willy Tarreau27a84c92017-10-17 08:10:17 +02002002 if (unlikely(ret <= 0)) {
2003 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002004 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2005 goto retry;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002006 h2c->flags |= H2_CF_MUX_MFULL;
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 else {
2011 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002012 ret = 0;
2013 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002014 }
2015 }
2016
Willy Tarreau8adae7c2018-03-22 17:37:05 +01002017 ignore:
Willy Tarreauab0e1da2018-10-05 10:16:37 +02002018 if (h2s->id) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02002019 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01002020 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002021 }
2022
Willy Tarreau7838a792019-08-12 18:42:03 +02002023 out:
Willy Tarreau4781b152021-04-06 13:53:36 +02002024 HA_ATOMIC_INC(&h2c->px_counters->rst_stream_resp);
Willy Tarreau7838a792019-08-12 18:42:03 +02002025 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02002026 return ret;
2027}
2028
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002029/* try to send an empty DATA frame with the ES flag set to notify about the
2030 * end of stream and match a shutdown(write). If an ES was already sent as
2031 * indicated by HLOC/ERROR/RESET/CLOSED states, nothing is done. Returns > 0
2032 * on success or zero if nothing was done. In case of lack of room to write the
2033 * message, it subscribes the requesting stream to future notifications.
2034 */
2035static int h2_send_empty_data_es(struct h2s *h2s)
2036{
2037 struct h2c *h2c = h2s->h2c;
2038 struct buffer *res;
2039 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002040 int ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002041
Willy Tarreau7838a792019-08-12 18:42:03 +02002042 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
2043
2044 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED) {
2045 ret = 1;
2046 goto out;
2047 }
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002048
2049 if (h2c_mux_busy(h2c, h2s)) {
2050 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002051 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002052 }
2053
Willy Tarreau9c218e72019-05-26 10:08:28 +02002054 /* len: 0x000000, type: 0(DATA), flags: ES=1 */
2055 memcpy(str, "\x00\x00\x00\x00\x01", 5);
2056 write_n32(str + 5, h2s->id);
2057
Willy Tarreaubcc45952019-05-26 10:05:50 +02002058 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002059 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002060 if (!h2_get_buf(h2c, res)) {
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002061 h2c->flags |= H2_CF_MUX_MALLOC;
2062 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002063 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002064 }
2065
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002066 ret = b_istput(res, ist2(str, 9));
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002067 if (likely(ret > 0)) {
2068 h2s->flags |= H2_SF_ES_SENT;
2069 }
2070 else if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002071 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2072 goto retry;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002073 h2c->flags |= H2_CF_MUX_MFULL;
2074 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002075 }
2076 else {
2077 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002078 ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002079 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002080 out:
2081 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002082 return ret;
2083}
2084
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05002085/* wake a specific stream and assign its conn_stream some CS_FL_* flags among
Willy Tarreau99ad1b32019-05-14 11:46:28 +02002086 * CS_FL_ERR_PENDING and CS_FL_ERROR if needed. The stream's state
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002087 * is automatically updated accordingly. If the stream is orphaned, it is
2088 * destroyed.
Christopher Fauletf02ca002019-03-07 16:21:34 +01002089 */
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002090static void h2s_wake_one_stream(struct h2s *h2s)
Christopher Fauletf02ca002019-03-07 16:21:34 +01002091{
Willy Tarreau7838a792019-08-12 18:42:03 +02002092 struct h2c *h2c = h2s->h2c;
2093
2094 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn, h2s);
2095
Christopher Fauletf02ca002019-03-07 16:21:34 +01002096 if (!h2s->cs) {
2097 /* this stream was already orphaned */
2098 h2s_destroy(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002099 TRACE_DEVEL("leaving with no h2s", H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002100 return;
2101 }
2102
Christopher Fauletaade4ed2020-10-08 15:38:41 +02002103 if (h2c_read0_pending(h2s->h2c)) {
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002104 if (h2s->st == H2_SS_OPEN)
2105 h2s->st = H2_SS_HREM;
2106 else if (h2s->st == H2_SS_HLOC)
2107 h2s_close(h2s);
2108 }
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002109
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002110 if ((h2s->h2c->st0 >= H2_CS_ERROR || h2s->h2c->conn->flags & CO_FL_ERROR) ||
2111 (h2s->h2c->last_sid > 0 && (!h2s->id || h2s->id > h2s->h2c->last_sid))) {
2112 h2s->cs->flags |= CS_FL_ERR_PENDING;
2113 if (h2s->cs->flags & CS_FL_EOS)
2114 h2s->cs->flags |= CS_FL_ERROR;
Willy Tarreau23482912019-05-07 15:23:14 +02002115
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002116 if (h2s->st < H2_SS_ERROR)
2117 h2s->st = H2_SS_ERROR;
2118 }
Christopher Fauletf02ca002019-03-07 16:21:34 +01002119
2120 h2s_alert(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002121 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002122}
2123
2124/* wake the streams attached to the connection, whose id is greater than <last>
2125 * or unassigned.
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002126 */
Willy Tarreau23482912019-05-07 15:23:14 +02002127static void h2_wake_some_streams(struct h2c *h2c, int last)
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002128{
2129 struct eb32_node *node;
2130 struct h2s *h2s;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002131
Willy Tarreau7838a792019-08-12 18:42:03 +02002132 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn);
2133
Christopher Fauletf02ca002019-03-07 16:21:34 +01002134 /* Wake all streams with ID > last */
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002135 node = eb32_lookup_ge(&h2c->streams_by_id, last + 1);
2136 while (node) {
2137 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002138 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002139 h2s_wake_one_stream(h2s);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002140 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01002141
Christopher Fauletf02ca002019-03-07 16:21:34 +01002142 /* Wake all streams with unassigned ID (ID == 0) */
2143 node = eb32_lookup(&h2c->streams_by_id, 0);
2144 while (node) {
2145 h2s = container_of(node, struct h2s, by_id);
2146 if (h2s->id > 0)
2147 break;
2148 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002149 h2s_wake_one_stream(h2s);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002150 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002151
2152 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002153}
2154
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002155/* Wake up all blocked streams whose window size has become positive after the
2156 * mux's initial window was adjusted. This should be done after having processed
2157 * SETTINGS frames which have updated the mux's initial window size.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002158 */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002159static void h2c_unblock_sfctl(struct h2c *h2c)
Willy Tarreau3421aba2017-07-27 15:41:03 +02002160{
2161 struct h2s *h2s;
2162 struct eb32_node *node;
2163
Willy Tarreau7838a792019-08-12 18:42:03 +02002164 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
2165
Willy Tarreau3421aba2017-07-27 15:41:03 +02002166 node = eb32_first(&h2c->streams_by_id);
2167 while (node) {
2168 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002169 if (h2s->flags & H2_SF_BLK_SFCTL && h2s_mws(h2s) > 0) {
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002170 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002171 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002172 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2173 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreau2b718102021-04-21 07:32:39 +02002174 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002175 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002176 node = eb32_next(node);
2177 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002178
2179 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002180}
2181
2182/* processes a SETTINGS frame whose payload is <payload> for <plen> bytes, and
2183 * ACKs it if needed. Returns > 0 on success or zero on missing data. It may
Willy Tarreaub860c732019-01-30 15:39:55 +01002184 * return an error in h2c. The caller must have already verified frame length
2185 * and stream ID validity. Described in RFC7540#6.5.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002186 */
2187static int h2c_handle_settings(struct h2c *h2c)
2188{
2189 unsigned int offset;
2190 int error;
2191
Willy Tarreau7838a792019-08-12 18:42:03 +02002192 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
2193
Willy Tarreau3421aba2017-07-27 15:41:03 +02002194 if (h2c->dff & H2_F_SETTINGS_ACK) {
2195 if (h2c->dfl) {
2196 error = H2_ERR_FRAME_SIZE_ERROR;
2197 goto fail;
2198 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002199 goto done;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002200 }
2201
Willy Tarreau3421aba2017-07-27 15:41:03 +02002202 /* process full frame only */
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002203 if (b_data(&h2c->dbuf) < h2c->dfl) {
2204 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002205 goto out0;
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002206 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002207
2208 /* parse the frame */
2209 for (offset = 0; offset < h2c->dfl; offset += 6) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002210 uint16_t type = h2_get_n16(&h2c->dbuf, offset);
2211 int32_t arg = h2_get_n32(&h2c->dbuf, offset + 2);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002212
2213 switch (type) {
2214 case H2_SETTINGS_INITIAL_WINDOW_SIZE:
2215 /* we need to update all existing streams with the
2216 * difference from the previous iws.
2217 */
2218 if (arg < 0) { // RFC7540#6.5.2
2219 error = H2_ERR_FLOW_CONTROL_ERROR;
2220 goto fail;
2221 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002222 h2c->miw = arg;
2223 break;
2224 case H2_SETTINGS_MAX_FRAME_SIZE:
2225 if (arg < 16384 || arg > 16777215) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002226 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 +02002227 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002228 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002229 goto fail;
2230 }
2231 h2c->mfs = arg;
2232 break;
Willy Tarreau1b38b462017-12-03 19:02:28 +01002233 case H2_SETTINGS_ENABLE_PUSH:
2234 if (arg < 0 || arg > 1) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002235 TRACE_ERROR("ENABLE_PUSH out of range", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002236 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002237 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002238 goto fail;
2239 }
2240 break;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01002241 case H2_SETTINGS_MAX_CONCURRENT_STREAMS:
2242 if (h2c->flags & H2_CF_IS_BACK) {
2243 /* the limit is only for the backend; for the frontend it is our limit */
2244 if ((unsigned int)arg > h2_settings_max_concurrent_streams)
2245 arg = h2_settings_max_concurrent_streams;
2246 h2c->streams_limit = arg;
2247 }
2248 break;
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01002249 case H2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
Amaury Denoyelle0df04362021-10-18 09:43:29 +02002250 if (arg == 1)
2251 h2c->flags |= H2_CF_RCVD_RFC8441;
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01002252 break;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002253 }
2254 }
2255
2256 /* need to ACK this frame now */
2257 h2c->st0 = H2_CS_FRAME_A;
Willy Tarreau7838a792019-08-12 18:42:03 +02002258 done:
2259 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002260 return 1;
2261 fail:
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002262 if (!(h2c->flags & H2_CF_IS_BACK))
2263 sess_log(h2c->conn->owner);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002264 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002265 out0:
2266 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 +02002267 return 0;
2268}
2269
2270/* try to send an ACK for a settings frame on the connection. Returns > 0 on
2271 * success or one of the h2_status values.
2272 */
2273static int h2c_ack_settings(struct h2c *h2c)
2274{
2275 struct buffer *res;
2276 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002277 int ret = 0;
2278
2279 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002280
2281 if (h2c_mux_busy(h2c, NULL)) {
2282 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002283 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002284 }
2285
Willy Tarreau9c218e72019-05-26 10:08:28 +02002286 memcpy(str,
2287 "\x00\x00\x00" /* length : 0 (no data) */
2288 "\x04" "\x01" /* type : 4, flags : ACK */
2289 "\x00\x00\x00\x00" /* stream ID */, 9);
2290
Willy Tarreaubcc45952019-05-26 10:05:50 +02002291 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002292 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002293 if (!h2_get_buf(h2c, res)) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02002294 h2c->flags |= H2_CF_MUX_MALLOC;
2295 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002296 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002297 }
2298
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002299 ret = b_istput(res, ist2(str, 9));
Willy Tarreau3421aba2017-07-27 15:41:03 +02002300 if (unlikely(ret <= 0)) {
2301 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002302 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2303 goto retry;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002304 h2c->flags |= H2_CF_MUX_MFULL;
2305 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002306 }
2307 else {
2308 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002309 ret = 0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002310 }
2311 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002312 out:
2313 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002314 return ret;
2315}
2316
Willy Tarreaucf68c782017-10-10 17:11:41 +02002317/* processes a PING frame and schedules an ACK if needed. The caller must pass
2318 * the pointer to the payload in <payload>. Returns > 0 on success or zero on
Willy Tarreaub860c732019-01-30 15:39:55 +01002319 * missing data. The caller must have already verified frame length
2320 * and stream ID validity.
Willy Tarreaucf68c782017-10-10 17:11:41 +02002321 */
2322static int h2c_handle_ping(struct h2c *h2c)
2323{
Willy Tarreaucf68c782017-10-10 17:11:41 +02002324 /* schedule a response */
Willy Tarreau68ed6412017-12-03 18:15:56 +01002325 if (!(h2c->dff & H2_F_PING_ACK))
Willy Tarreaucf68c782017-10-10 17:11:41 +02002326 h2c->st0 = H2_CS_FRAME_A;
2327 return 1;
2328}
2329
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002330/* Try to send a window update for stream id <sid> and value <increment>.
2331 * Returns > 0 on success or zero on missing room or failure. It may return an
2332 * error in h2c.
2333 */
2334static int h2c_send_window_update(struct h2c *h2c, int sid, uint32_t increment)
2335{
2336 struct buffer *res;
2337 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002338 int ret = 0;
2339
2340 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002341
2342 if (h2c_mux_busy(h2c, NULL)) {
2343 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002344 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002345 }
2346
Willy Tarreau9c218e72019-05-26 10:08:28 +02002347 /* length: 4, type: 8, flags: none */
2348 memcpy(str, "\x00\x00\x04\x08\x00", 5);
2349 write_n32(str + 5, sid);
2350 write_n32(str + 9, increment);
2351
Willy Tarreaubcc45952019-05-26 10:05:50 +02002352 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002353 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002354 if (!h2_get_buf(h2c, res)) {
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002355 h2c->flags |= H2_CF_MUX_MALLOC;
2356 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002357 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002358 }
2359
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002360 ret = b_istput(res, ist2(str, 13));
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002361 if (unlikely(ret <= 0)) {
2362 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002363 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2364 goto retry;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002365 h2c->flags |= H2_CF_MUX_MFULL;
2366 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002367 }
2368 else {
2369 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002370 ret = 0;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002371 }
2372 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002373 out:
2374 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002375 return ret;
2376}
2377
2378/* try to send pending window update for the connection. It's safe to call it
2379 * with no pending updates. Returns > 0 on success or zero on missing room or
2380 * failure. It may return an error in h2c.
2381 */
2382static int h2c_send_conn_wu(struct h2c *h2c)
2383{
2384 int ret = 1;
2385
Willy Tarreau7838a792019-08-12 18:42:03 +02002386 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2387
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002388 if (h2c->rcvd_c <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002389 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002390
Willy Tarreau97aaa672018-12-23 09:49:04 +01002391 if (!(h2c->flags & H2_CF_WINDOW_OPENED)) {
2392 /* increase the advertised connection window to 2G on
2393 * first update.
2394 */
2395 h2c->flags |= H2_CF_WINDOW_OPENED;
2396 h2c->rcvd_c += H2_INITIAL_WINDOW_INCREMENT;
2397 }
2398
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002399 /* send WU for the connection */
2400 ret = h2c_send_window_update(h2c, 0, h2c->rcvd_c);
2401 if (ret > 0)
2402 h2c->rcvd_c = 0;
2403
Willy Tarreau7838a792019-08-12 18:42:03 +02002404 out:
2405 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002406 return ret;
2407}
2408
2409/* try to send pending window update for the current dmux stream. It's safe to
2410 * call it with no pending updates. Returns > 0 on success or zero on missing
2411 * room or failure. It may return an error in h2c.
2412 */
2413static int h2c_send_strm_wu(struct h2c *h2c)
2414{
2415 int ret = 1;
2416
Willy Tarreau7838a792019-08-12 18:42:03 +02002417 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2418
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002419 if (h2c->rcvd_s <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002420 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002421
2422 /* send WU for the stream */
2423 ret = h2c_send_window_update(h2c, h2c->dsi, h2c->rcvd_s);
2424 if (ret > 0)
2425 h2c->rcvd_s = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002426 out:
2427 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002428 return ret;
2429}
2430
Willy Tarreaucf68c782017-10-10 17:11:41 +02002431/* try to send an ACK for a ping frame on the connection. Returns > 0 on
2432 * success, 0 on missing data or one of the h2_status values.
2433 */
2434static int h2c_ack_ping(struct h2c *h2c)
2435{
2436 struct buffer *res;
2437 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02002438 int ret = 0;
2439
2440 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002441
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002442 if (b_data(&h2c->dbuf) < 8)
Willy Tarreau7838a792019-08-12 18:42:03 +02002443 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002444
2445 if (h2c_mux_busy(h2c, NULL)) {
2446 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002447 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002448 }
2449
Willy Tarreaucf68c782017-10-10 17:11:41 +02002450 memcpy(str,
2451 "\x00\x00\x08" /* length : 8 (same payload) */
2452 "\x06" "\x01" /* type : 6, flags : ACK */
2453 "\x00\x00\x00\x00" /* stream ID */, 9);
2454
2455 /* copy the original payload */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002456 h2_get_buf_bytes(str + 9, 8, &h2c->dbuf, 0);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002457
Willy Tarreau9c218e72019-05-26 10:08:28 +02002458 res = br_tail(h2c->mbuf);
2459 retry:
2460 if (!h2_get_buf(h2c, res)) {
2461 h2c->flags |= H2_CF_MUX_MALLOC;
2462 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002463 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02002464 }
2465
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002466 ret = b_istput(res, ist2(str, 17));
Willy Tarreaucf68c782017-10-10 17:11:41 +02002467 if (unlikely(ret <= 0)) {
2468 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002469 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2470 goto retry;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002471 h2c->flags |= H2_CF_MUX_MFULL;
2472 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002473 }
2474 else {
2475 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002476 ret = 0;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002477 }
2478 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002479 out:
2480 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002481 return ret;
2482}
2483
Willy Tarreau26f95952017-07-27 17:18:30 +02002484/* processes a WINDOW_UPDATE frame whose payload is <payload> for <plen> bytes.
2485 * Returns > 0 on success or zero on missing data. It may return an error in
Willy Tarreaub860c732019-01-30 15:39:55 +01002486 * h2c or h2s. The caller must have already verified frame length and stream ID
2487 * validity. Described in RFC7540#6.9.
Willy Tarreau26f95952017-07-27 17:18:30 +02002488 */
2489static int h2c_handle_window_update(struct h2c *h2c, struct h2s *h2s)
2490{
2491 int32_t inc;
2492 int error;
2493
Willy Tarreau7838a792019-08-12 18:42:03 +02002494 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
2495
Willy Tarreau26f95952017-07-27 17:18:30 +02002496 /* process full frame only */
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002497 if (b_data(&h2c->dbuf) < h2c->dfl) {
2498 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002499 goto out0;
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002500 }
Willy Tarreau26f95952017-07-27 17:18:30 +02002501
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002502 inc = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau26f95952017-07-27 17:18:30 +02002503
2504 if (h2c->dsi != 0) {
2505 /* stream window update */
Willy Tarreau26f95952017-07-27 17:18:30 +02002506
2507 /* it's not an error to receive WU on a closed stream */
2508 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau7838a792019-08-12 18:42:03 +02002509 goto done;
Willy Tarreau26f95952017-07-27 17:18:30 +02002510
2511 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002512 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 +02002513 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002514 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002515 goto strm_err;
2516 }
2517
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002518 if (h2s_mws(h2s) >= 0 && h2s_mws(h2s) + inc < 0) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002519 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 +02002520 error = H2_ERR_FLOW_CONTROL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002521 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002522 goto strm_err;
2523 }
2524
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002525 h2s->sws += inc;
2526 if (h2s_mws(h2s) > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002527 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002528 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002529 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2530 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreau2b718102021-04-21 07:32:39 +02002531 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreau26f95952017-07-27 17:18:30 +02002532 }
2533 }
2534 else {
2535 /* connection window update */
2536 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002537 TRACE_ERROR("conn WINDOW_UPDATE inc=0", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002538 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002539 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002540 goto conn_err;
2541 }
2542
2543 if (h2c->mws >= 0 && h2c->mws + inc < 0) {
2544 error = H2_ERR_FLOW_CONTROL_ERROR;
2545 goto conn_err;
2546 }
2547
2548 h2c->mws += inc;
2549 }
2550
Willy Tarreau7838a792019-08-12 18:42:03 +02002551 done:
2552 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002553 return 1;
2554
2555 conn_err:
2556 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002557 out0:
2558 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 +02002559 return 0;
2560
2561 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002562 h2s_error(h2s, error);
2563 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002564 TRACE_DEVEL("leaving on stream error", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002565 return 0;
2566}
2567
Willy Tarreaue96b0922017-10-30 00:28:29 +01002568/* processes a GOAWAY frame, and signals all streams whose ID is greater than
Willy Tarreaub860c732019-01-30 15:39:55 +01002569 * the last ID. Returns > 0 on success or zero on missing data. The caller must
2570 * have already verified frame length and stream ID validity. Described in
2571 * RFC7540#6.8.
Willy Tarreaue96b0922017-10-30 00:28:29 +01002572 */
2573static int h2c_handle_goaway(struct h2c *h2c)
2574{
Willy Tarreaue96b0922017-10-30 00:28:29 +01002575 int last;
2576
Willy Tarreau7838a792019-08-12 18:42:03 +02002577 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002578 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002579 if (b_data(&h2c->dbuf) < h2c->dfl) {
2580 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002581 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002582 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002583 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01002584
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002585 last = h2_get_n32(&h2c->dbuf, 0);
2586 h2c->errcode = h2_get_n32(&h2c->dbuf, 4);
Willy Tarreau11cc2d62017-12-03 10:27:47 +01002587 if (h2c->last_sid < 0)
2588 h2c->last_sid = last;
Willy Tarreau23482912019-05-07 15:23:14 +02002589 h2_wake_some_streams(h2c, last);
Willy Tarreau7838a792019-08-12 18:42:03 +02002590 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002591 return 1;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002592}
2593
Willy Tarreau92153fc2017-12-03 19:46:19 +01002594/* processes a PRIORITY frame, and either skips it or rejects if it is
Willy Tarreaub860c732019-01-30 15:39:55 +01002595 * invalid. Returns > 0 on success or zero on missing data. It may return an
2596 * error in h2c. The caller must have already verified frame length and stream
2597 * ID validity. Described in RFC7540#6.3.
Willy Tarreau92153fc2017-12-03 19:46:19 +01002598 */
2599static int h2c_handle_priority(struct h2c *h2c)
2600{
Willy Tarreau7838a792019-08-12 18:42:03 +02002601 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
2602
Willy Tarreau92153fc2017-12-03 19:46:19 +01002603 /* process full frame only */
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002604 if (b_data(&h2c->dbuf) < h2c->dfl) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002605 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002606 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002607 return 0;
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002608 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01002609
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002610 if (h2_get_n32(&h2c->dbuf, 0) == h2c->dsi) {
Willy Tarreau92153fc2017-12-03 19:46:19 +01002611 /* 7540#5.3 : can't depend on itself */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002612 TRACE_ERROR("PRIORITY depends on itself", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002613 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02002614 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002615 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002616 return 0;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002617 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002618 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002619 return 1;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002620}
2621
Willy Tarreaucd234e92017-08-18 10:59:39 +02002622/* processes an RST_STREAM frame, and sets the 32-bit error code on the stream.
Willy Tarreaub860c732019-01-30 15:39:55 +01002623 * Returns > 0 on success or zero on missing data. The caller must have already
2624 * verified frame length and stream ID validity. Described in RFC7540#6.4.
Willy Tarreaucd234e92017-08-18 10:59:39 +02002625 */
2626static int h2c_handle_rst_stream(struct h2c *h2c, struct h2s *h2s)
2627{
Willy Tarreau7838a792019-08-12 18:42:03 +02002628 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
2629
Willy Tarreaucd234e92017-08-18 10:59:39 +02002630 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002631 if (b_data(&h2c->dbuf) < h2c->dfl) {
2632 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002633 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002634 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002635 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002636
2637 /* late RST, already handled */
Willy Tarreau7838a792019-08-12 18:42:03 +02002638 if (h2s->st == H2_SS_CLOSED) {
2639 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 +02002640 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002641 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002642
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002643 h2s->errcode = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau00dd0782018-03-01 16:31:34 +01002644 h2s_close(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002645
2646 if (h2s->cs) {
Willy Tarreauec988c72018-12-19 18:00:29 +01002647 cs_set_error(h2s->cs);
Willy Tarreauf830f012018-12-19 17:44:55 +01002648 h2s_alert(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002649 }
2650
2651 h2s->flags |= H2_SF_RST_RCVD;
Willy Tarreau7838a792019-08-12 18:42:03 +02002652 TRACE_LEAVE(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 Tarreaucd234e92017-08-18 10:59:39 +02002654}
2655
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002656/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2657 * It may return an error in h2c or h2s. The caller must consider that the
2658 * return value is the new h2s in case one was allocated (most common case).
2659 * Described in RFC7540#6.2. Most of the
Willy Tarreau13278b42017-10-13 19:23:14 +02002660 * errors here are reported as connection errors since it's impossible to
2661 * recover from such errors after the compression context has been altered.
2662 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002663static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau13278b42017-10-13 19:23:14 +02002664{
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002665 struct buffer rxbuf = BUF_NULL;
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002666 unsigned long long body_len = 0;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002667 uint32_t flags = 0;
Willy Tarreau13278b42017-10-13 19:23:14 +02002668 int error;
2669
Willy Tarreau7838a792019-08-12 18:42:03 +02002670 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2671
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002672 if (!b_size(&h2c->dbuf)) {
2673 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002674 goto out; // empty buffer
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002675 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002676
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002677 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2678 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002679 goto out; // incomplete frame
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002680 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002681
2682 /* now either the frame is complete or the buffer is complete */
2683 if (h2s->st != H2_SS_IDLE) {
Willy Tarreau88d138e2019-01-02 19:38:14 +01002684 /* The stream exists/existed, this must be a trailers frame */
2685 if (h2s->st != H2_SS_CLOSED) {
Amaury Denoyelle74162742020-12-11 17:53:05 +01002686 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &body_len, NULL);
Willy Tarreauaab1a602019-05-06 11:12:18 +02002687 /* unrecoverable error ? */
2688 if (h2c->st0 >= H2_CS_ERROR)
2689 goto out;
2690
Christopher Faulet485da0b2021-10-08 08:56:00 +02002691 if (error == 0) {
2692 /* Demux not blocked because of the stream, it is an incomplete frame */
2693 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2694 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002695 goto out; // missing data
Christopher Faulet485da0b2021-10-08 08:56:00 +02002696 }
Willy Tarreauaab1a602019-05-06 11:12:18 +02002697
2698 if (error < 0) {
2699 /* Failed to decode this frame (e.g. too large request)
2700 * but the HPACK decompressor is still synchronized.
2701 */
2702 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
2703 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau88d138e2019-01-02 19:38:14 +01002704 goto out;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002705 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01002706 goto done;
2707 }
Willy Tarreau1f035502019-01-30 11:44:07 +01002708 /* the connection was already killed by an RST, let's consume
2709 * the data and send another RST.
2710 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01002711 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Willy Tarreau1f035502019-01-30 11:44:07 +01002712 h2s = (struct h2s*)h2_error_stream;
2713 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002714 }
2715 else if (h2c->dsi <= h2c->max_id || !(h2c->dsi & 1)) {
2716 /* RFC7540#5.1.1 stream id > prev ones, and must be odd here */
2717 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002718 TRACE_ERROR("HEADERS on invalid stream ID", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau4781b152021-04-06 13:53:36 +02002719 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau22de8d32018-09-05 19:55:58 +02002720 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02002721 goto conn_err;
2722 }
Willy Tarreau415b1ee2019-01-02 13:59:43 +01002723 else if (h2c->flags & H2_CF_DEM_TOOMANY)
2724 goto out; // IDLE but too many cs still present
Willy Tarreau13278b42017-10-13 19:23:14 +02002725
Amaury Denoyelle74162742020-12-11 17:53:05 +01002726 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002727
Willy Tarreau25919232019-01-03 14:48:18 +01002728 /* unrecoverable error ? */
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002729 if (h2c->st0 >= H2_CS_ERROR)
2730 goto out;
2731
Willy Tarreau25919232019-01-03 14:48:18 +01002732 if (error <= 0) {
Christopher Faulet485da0b2021-10-08 08:56:00 +02002733 if (error == 0) {
2734 /* Demux not blocked because of the stream, it is an incomplete frame */
2735 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2736 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau25919232019-01-03 14:48:18 +01002737 goto out; // missing data
Christopher Faulet485da0b2021-10-08 08:56:00 +02002738 }
Willy Tarreau25919232019-01-03 14:48:18 +01002739
2740 /* Failed to decode this stream (e.g. too large request)
2741 * but the HPACK decompressor is still synchronized.
2742 */
2743 h2s = (struct h2s*)h2_error_stream;
2744 goto send_rst;
2745 }
2746
Willy Tarreau29268e92021-06-17 08:29:14 +02002747 TRACE_USER("rcvd H2 request ", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW, h2c->conn, 0, &rxbuf);
2748
Willy Tarreau22de8d32018-09-05 19:55:58 +02002749 /* Note: we don't emit any other logs below because ff we return
Willy Tarreaua8e49542018-10-03 18:53:55 +02002750 * positively from h2c_frt_stream_new(), the stream will report the error,
2751 * and if we return in error, h2c_frt_stream_new() will emit the error.
Christopher Faulet7d013e72020-12-15 16:56:50 +01002752 *
2753 * Xfer the rxbuf to the stream. On success, the new stream owns the
2754 * rxbuf. On error, it is released here.
Willy Tarreau22de8d32018-09-05 19:55:58 +02002755 */
Amaury Denoyelle90ac6052021-10-18 14:45:49 +02002756 h2s = h2c_frt_stream_new(h2c, h2c->dsi, &rxbuf, flags);
Willy Tarreau13278b42017-10-13 19:23:14 +02002757 if (!h2s) {
Willy Tarreau96a10c22018-12-23 18:30:44 +01002758 h2s = (struct h2s*)h2_refused_stream;
2759 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002760 }
2761
2762 h2s->st = H2_SS_OPEN;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002763 h2s->flags |= flags;
Willy Tarreau1915ca22019-01-24 11:49:37 +01002764 h2s->body_len = body_len;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002765
Willy Tarreau88d138e2019-01-02 19:38:14 +01002766 done:
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002767 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau13278b42017-10-13 19:23:14 +02002768 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002769
2770 if (h2s->flags & H2_SF_ES_RCVD) {
Willy Tarreaufc10f592019-01-30 19:28:32 +01002771 if (h2s->st == H2_SS_OPEN)
2772 h2s->st = H2_SS_HREM;
2773 else
2774 h2s_close(h2s);
Willy Tarreau13278b42017-10-13 19:23:14 +02002775 }
2776
Willy Tarreau3a429f02019-01-03 11:41:50 +01002777 /* update the max stream ID if the request is being processed */
2778 if (h2s->id > h2c->max_id)
2779 h2c->max_id = h2s->id;
Willy Tarreau13278b42017-10-13 19:23:14 +02002780
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002781 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002782
2783 conn_err:
2784 h2c_error(h2c, error);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002785 goto out;
Willy Tarreau13278b42017-10-13 19:23:14 +02002786
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002787 out:
2788 h2_release_buf(h2c, &rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002789 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 +01002790 return NULL;
Willy Tarreau96a10c22018-12-23 18:30:44 +01002791
2792 send_rst:
2793 /* make the demux send an RST for the current stream. We may only
2794 * do this if we're certain that the HEADERS frame was properly
2795 * decompressed so that the HPACK decoder is still kept up to date.
2796 */
2797 h2_release_buf(h2c, &rxbuf);
2798 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002799
Willy Tarreau022e5e52020-09-10 09:33:15 +02002800 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 +02002801 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau96a10c22018-12-23 18:30:44 +01002802 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002803}
2804
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002805/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2806 * It may return an error in h2c or h2s. Described in RFC7540#6.2. Most of the
2807 * errors here are reported as connection errors since it's impossible to
2808 * recover from such errors after the compression context has been altered.
2809 */
2810static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
2811{
Christopher Faulet6884aa32019-09-23 15:28:20 +02002812 struct buffer rxbuf = BUF_NULL;
2813 unsigned long long body_len = 0;
2814 uint32_t flags = 0;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002815 int error;
2816
Willy Tarreau7838a792019-08-12 18:42:03 +02002817 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2818
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002819 if (!b_size(&h2c->dbuf)) {
2820 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002821 goto fail; // empty buffer
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002822 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002823
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002824 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2825 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002826 goto fail; // incomplete frame
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002827 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002828
Christopher Faulet6884aa32019-09-23 15:28:20 +02002829 if (h2s->st != H2_SS_CLOSED) {
Amaury Denoyelle74162742020-12-11 17:53:05 +01002830 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &h2s->body_len, h2s->upgrade_protocol);
Christopher Faulet6884aa32019-09-23 15:28:20 +02002831 }
2832 else {
2833 /* the connection was already killed by an RST, let's consume
2834 * the data and send another RST.
2835 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01002836 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Christopher Fauletea7a7782019-09-26 16:19:13 +02002837 h2s = (struct h2s*)h2_error_stream;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002838 h2c->st0 = H2_CS_FRAME_E;
2839 goto send_rst;
2840 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002841
Willy Tarreau25919232019-01-03 14:48:18 +01002842 /* unrecoverable error ? */
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002843 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002844 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002845
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002846 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2847 /* RFC7540#5.1 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002848 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 +01002849 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2850 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau4781b152021-04-06 13:53:36 +02002851 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002852 goto fail;
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002853 }
2854
Willy Tarreau25919232019-01-03 14:48:18 +01002855 if (error <= 0) {
Christopher Faulet485da0b2021-10-08 08:56:00 +02002856 if (error == 0) {
2857 /* Demux not blocked because of the stream, it is an incomplete frame */
2858 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2859 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002860 goto fail; // missing data
Christopher Faulet485da0b2021-10-08 08:56:00 +02002861 }
Willy Tarreau25919232019-01-03 14:48:18 +01002862
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002863 /* stream error : send RST_STREAM */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002864 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 +01002865 h2s_error(h2s, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002866 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau4781b152021-04-06 13:53:36 +02002867 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002868 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002869 }
2870
Christopher Fauletfa922f02019-05-07 10:55:17 +02002871 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002872 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002873
Willy Tarreau927b88b2019-03-04 08:03:25 +01002874 if (h2s->cs && h2s->cs->flags & CS_FL_ERROR && h2s->st < H2_SS_ERROR)
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002875 h2s->st = H2_SS_ERROR;
Christopher Fauletfa922f02019-05-07 10:55:17 +02002876 else if (h2s->flags & H2_SF_ES_RCVD) {
2877 if (h2s->st == H2_SS_OPEN)
2878 h2s->st = H2_SS_HREM;
2879 else if (h2s->st == H2_SS_HLOC)
2880 h2s_close(h2s);
2881 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002882
Christopher Fauletf95f8762021-01-22 11:59:07 +01002883 /* Unblock busy server h2s waiting for the response headers to validate
2884 * the tunnel establishment or the end of the response of an oborted
2885 * tunnel
2886 */
2887 if ((h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY)) == (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY) ||
2888 (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)) {
2889 TRACE_STATE("Unblock h2s blocked on tunnel establishment/abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2890 h2s->flags &= ~H2_SF_BLK_MBUSY;
2891 }
2892
Willy Tarreau9abb3172021-06-16 18:32:42 +02002893 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 +02002894 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002895 return h2s;
Willy Tarreau7838a792019-08-12 18:42:03 +02002896 fail:
2897 TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2898 return NULL;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002899
2900 send_rst:
2901 /* make the demux send an RST for the current stream. We may only
2902 * do this if we're certain that the HEADERS frame was properly
2903 * decompressed so that the HPACK decoder is still kept up to date.
2904 */
2905 h2_release_buf(h2c, &rxbuf);
2906 h2c->st0 = H2_CS_FRAME_E;
2907
Willy Tarreau022e5e52020-09-10 09:33:15 +02002908 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 +02002909 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2910 return h2s;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002911}
2912
Willy Tarreau454f9052017-10-26 19:40:35 +02002913/* processes a DATA frame. Returns > 0 on success or zero on missing data.
2914 * It may return an error in h2c or h2s. Described in RFC7540#6.1.
2915 */
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01002916static int h2c_handle_data(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02002917{
2918 int error;
2919
Willy Tarreau7838a792019-08-12 18:42:03 +02002920 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2921
Willy Tarreau454f9052017-10-26 19:40:35 +02002922 /* note that empty DATA frames are perfectly valid and sometimes used
2923 * to signal an end of stream (with the ES flag).
2924 */
2925
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002926 if (!b_size(&h2c->dbuf) && h2c->dfl) {
2927 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002928 goto fail; // empty buffer
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002929 }
Willy Tarreau454f9052017-10-26 19:40:35 +02002930
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002931 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2932 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002933 goto fail; // incomplete frame
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002934 }
Willy Tarreau454f9052017-10-26 19:40:35 +02002935
2936 /* now either the frame is complete or the buffer is complete */
2937
Willy Tarreau454f9052017-10-26 19:40:35 +02002938 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2939 /* RFC7540#6.1 */
2940 error = H2_ERR_STREAM_CLOSED;
2941 goto strm_err;
2942 }
2943
Christopher Faulet4f09ec82019-06-19 09:25:58 +02002944 if ((h2s->flags & H2_SF_DATA_CLEN) && (h2c->dfl - h2c->dpl) > h2s->body_len) {
Willy Tarreau1915ca22019-01-24 11:49:37 +01002945 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002946 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 +01002947 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002948 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau1915ca22019-01-24 11:49:37 +01002949 goto strm_err;
2950 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01002951 if (!(h2c->flags & H2_CF_IS_BACK) &&
2952 (h2s->flags & (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT)) == (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT) &&
2953 ((h2c->dfl - h2c->dpl) || !(h2c->dff & H2_F_DATA_END_STREAM))) {
2954 /* a tunnel attempt was aborted but the client still try to send some raw data.
2955 * Thus the stream is closed with the CANCEL error. Here we take care it is not
2956 * an empty DATA Frame with the ES flag. The error is only handled if ES was
2957 * already sent to the client because depending on the scheduling, these data may
Ilya Shipitsinacf84592021-02-06 22:29:08 +05002958 * have been sent before the server response but not handle here.
Christopher Faulet91b21dc2021-01-22 12:13:15 +01002959 */
2960 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2961 error = H2_ERR_CANCEL;
2962 goto strm_err;
2963 }
Willy Tarreau1915ca22019-01-24 11:49:37 +01002964
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002965 if (!h2_frt_transfer_data(h2s))
Willy Tarreau7838a792019-08-12 18:42:03 +02002966 goto fail;
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002967
Willy Tarreau454f9052017-10-26 19:40:35 +02002968 /* call the upper layers to process the frame, then let the upper layer
2969 * notify the stream about any change.
2970 */
2971 if (!h2s->cs) {
Willy Tarreau082c4572019-08-06 10:11:02 +02002972 /* The upper layer has already closed, this may happen on
2973 * 4xx/redirects during POST, or when receiving a response
2974 * from an H2 server after the client has aborted.
2975 */
2976 error = H2_ERR_CANCEL;
Willy Tarreau454f9052017-10-26 19:40:35 +02002977 goto strm_err;
2978 }
2979
Willy Tarreau8f650c32017-11-21 19:36:21 +01002980 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002981 goto fail;
Willy Tarreau8f650c32017-11-21 19:36:21 +01002982
Willy Tarreau721c9742017-11-07 11:05:42 +01002983 if (h2s->st >= H2_SS_ERROR) {
Willy Tarreau454f9052017-10-26 19:40:35 +02002984 /* stream error : send RST_STREAM */
Willy Tarreaua20a5192017-12-27 11:02:06 +01002985 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02002986 }
2987
2988 /* check for completion : the callee will change this to FRAME_A or
2989 * FRAME_H once done.
2990 */
2991 if (h2c->st0 == H2_CS_FRAME_P)
Willy Tarreau7838a792019-08-12 18:42:03 +02002992 goto fail;
Willy Tarreau454f9052017-10-26 19:40:35 +02002993
Willy Tarreauc4134ba2017-12-11 18:45:08 +01002994 /* last frame */
2995 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02002996 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreaufc10f592019-01-30 19:28:32 +01002997 if (h2s->st == H2_SS_OPEN)
2998 h2s->st = H2_SS_HREM;
2999 else
3000 h2s_close(h2s);
3001
Willy Tarreau1915ca22019-01-24 11:49:37 +01003002 if (h2s->flags & H2_SF_DATA_CLEN && h2s->body_len) {
3003 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003004 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 +01003005 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02003006 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau1915ca22019-01-24 11:49:37 +01003007 goto strm_err;
3008 }
Willy Tarreauc4134ba2017-12-11 18:45:08 +01003009 }
3010
Christopher Fauletf95f8762021-01-22 11:59:07 +01003011 /* Unblock busy server h2s waiting for the end of the response for an
3012 * aborted tunnel
3013 */
3014 if ((h2c->flags & H2_CF_IS_BACK) &&
3015 (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)) {
3016 TRACE_STATE("Unblock h2s blocked on tunnel abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
3017 h2s->flags &= ~H2_SF_BLK_MBUSY;
3018 }
3019
Willy Tarreau7838a792019-08-12 18:42:03 +02003020 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02003021 return 1;
3022
Willy Tarreau454f9052017-10-26 19:40:35 +02003023 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01003024 h2s_error(h2s, error);
3025 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003026 fail:
3027 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 +02003028 return 0;
3029}
3030
Willy Tarreau63864812019-08-07 14:25:20 +02003031/* check that the current frame described in h2c->{dsi,dft,dfl,dff,...} is
3032 * valid for the current stream state. This is needed only after parsing the
3033 * frame header but in practice it can be performed at any time during
3034 * H2_CS_FRAME_P since no state transition happens there. Returns >0 on success
3035 * or 0 in case of error, in which case either h2s or h2c will carry an error.
3036 */
3037static int h2_frame_check_vs_state(struct h2c *h2c, struct h2s *h2s)
3038{
Willy Tarreau7838a792019-08-12 18:42:03 +02003039 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
3040
Willy Tarreau63864812019-08-07 14:25:20 +02003041 if (h2s->st == H2_SS_IDLE &&
3042 h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) {
3043 /* RFC7540#5.1: any frame other than HEADERS or PRIORITY in
3044 * this state MUST be treated as a connection error
3045 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003046 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 +02003047 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003048 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau63864812019-08-07 14:25:20 +02003049 /* only log if no other stream can report the error */
3050 sess_log(h2c->conn->owner);
3051 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003052 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02003053 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 +02003054 return 0;
3055 }
3056
Willy Tarreau57a18162019-11-24 14:57:53 +01003057 if (h2s->st == H2_SS_IDLE && (h2c->flags & H2_CF_IS_BACK)) {
3058 /* only PUSH_PROMISE would be permitted here */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003059 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 +01003060 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02003061 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau57a18162019-11-24 14:57:53 +01003062 TRACE_DEVEL("leaving in error (idle&back)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s);
3063 return 0;
3064 }
3065
Willy Tarreau63864812019-08-07 14:25:20 +02003066 if (h2s->st == H2_SS_HREM && h2c->dft != H2_FT_WINDOW_UPDATE &&
3067 h2c->dft != H2_FT_RST_STREAM && h2c->dft != H2_FT_PRIORITY) {
3068 /* RFC7540#5.1: any frame other than WU/PRIO/RST in
3069 * this state MUST be treated as a stream error.
3070 * 6.2, 6.6 and 6.10 further mandate that HEADERS/
3071 * PUSH_PROMISE/CONTINUATION cause connection errors.
3072 */
Amaury Denoyellea8879232020-10-27 17:16:03 +01003073 if (h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003074 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 +02003075 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02003076 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Amaury Denoyellea8879232020-10-27 17:16:03 +01003077 }
3078 else {
Willy Tarreau63864812019-08-07 14:25:20 +02003079 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
Amaury Denoyellea8879232020-10-27 17:16:03 +01003080 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003081 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 +02003082 return 0;
3083 }
3084
3085 /* Below the management of frames received in closed state is a
3086 * bit hackish because the spec makes strong differences between
3087 * streams closed by receiving RST, sending RST, and seeing ES
3088 * in both directions. In addition to this, the creation of a
3089 * new stream reusing the identifier of a closed one will be
3090 * detected here. Given that we cannot keep track of all closed
3091 * streams forever, we consider that unknown closed streams were
3092 * closed on RST received, which allows us to respond with an
3093 * RST without breaking the connection (eg: to abort a transfer).
3094 * Some frames have to be silently ignored as well.
3095 */
3096 if (h2s->st == H2_SS_CLOSED && h2c->dsi) {
3097 if (!(h2c->flags & H2_CF_IS_BACK) && h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
3098 /* #5.1.1: The identifier of a newly
3099 * established stream MUST be numerically
3100 * greater than all streams that the initiating
3101 * endpoint has opened or reserved. This
3102 * governs streams that are opened using a
3103 * HEADERS frame and streams that are reserved
3104 * using PUSH_PROMISE. An endpoint that
3105 * receives an unexpected stream identifier
3106 * MUST respond with a connection error.
3107 */
3108 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003109 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 +02003110 return 0;
3111 }
3112
Willy Tarreau4c08f122019-09-26 08:47:15 +02003113 if (h2s->flags & H2_SF_RST_RCVD &&
3114 !(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 +02003115 /* RFC7540#5.1:closed: an endpoint that
3116 * receives any frame other than PRIORITY after
3117 * receiving a RST_STREAM MUST treat that as a
3118 * stream error of type STREAM_CLOSED.
3119 *
3120 * Note that old streams fall into this category
3121 * and will lead to an RST being sent.
3122 *
3123 * However, we cannot generalize this to all frame types. Those
3124 * carrying compression state must still be processed before
3125 * being dropped or we'll desynchronize the decoder. This can
3126 * happen with request trailers received after sending an
3127 * RST_STREAM, or with header/trailers responses received after
3128 * sending RST_STREAM (aborted stream).
Willy Tarreau4c08f122019-09-26 08:47:15 +02003129 *
3130 * In addition, since our CLOSED streams always carry the
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003131 * RST_RCVD bit, we don't want to accidentally catch valid
Willy Tarreau4c08f122019-09-26 08:47:15 +02003132 * frames for a closed stream, i.e. RST/PRIO/WU.
Willy Tarreau63864812019-08-07 14:25:20 +02003133 */
3134 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
3135 h2c->st0 = H2_CS_FRAME_E;
Christopher Faulet6884aa32019-09-23 15:28:20 +02003136 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 +02003137 return 0;
3138 }
3139
3140 /* RFC7540#5.1:closed: if this state is reached as a
3141 * result of sending a RST_STREAM frame, the peer that
3142 * receives the RST_STREAM might have already sent
3143 * frames on the stream that cannot be withdrawn. An
3144 * endpoint MUST ignore frames that it receives on
3145 * closed streams after it has sent a RST_STREAM
3146 * frame. An endpoint MAY choose to limit the period
3147 * over which it ignores frames and treat frames that
3148 * arrive after this time as being in error.
3149 */
3150 if (h2s->id && !(h2s->flags & H2_SF_RST_SENT)) {
3151 /* RFC7540#5.1:closed: any frame other than
3152 * PRIO/WU/RST in this state MUST be treated as
3153 * a connection error
3154 */
3155 if (h2c->dft != H2_FT_RST_STREAM &&
3156 h2c->dft != H2_FT_PRIORITY &&
3157 h2c->dft != H2_FT_WINDOW_UPDATE) {
3158 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003159 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 +02003160 return 0;
3161 }
3162 }
3163 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003164 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02003165 return 1;
3166}
3167
Willy Tarreaubc933932017-10-09 16:21:43 +02003168/* process Rx frames to be demultiplexed */
3169static void h2_process_demux(struct h2c *h2c)
3170{
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003171 struct h2s *h2s = NULL, *tmp_h2s;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003172 struct h2_fh hdr;
3173 unsigned int padlen = 0;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003174 int32_t old_iw = h2c->miw;
Willy Tarreauf3ee0692017-10-17 08:18:25 +02003175
Willy Tarreau7838a792019-08-12 18:42:03 +02003176 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3177
Willy Tarreau081d4722017-05-16 21:51:05 +02003178 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02003179 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02003180
3181 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3182 if (h2c->st0 == H2_CS_PREFACE) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003183 TRACE_STATE("expecting preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02003184 if (h2c->flags & H2_CF_IS_BACK)
Willy Tarreau7838a792019-08-12 18:42:03 +02003185 goto out;
3186
Willy Tarreau52eed752017-09-22 15:05:09 +02003187 if (unlikely(h2c_frt_recv_preface(h2c) <= 0)) {
3188 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02003189 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003190 TRACE_PROTO("failed to receive preface", H2_EV_RX_PREFACE|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003191 h2c->st0 = H2_CS_ERROR2;
Willy Tarreauee4684f2021-06-17 08:08:48 +02003192 if (b_data(&h2c->dbuf) ||
Christopher Faulet3f35da22021-07-26 10:18:35 +02003193 !(((const struct session *)h2c->conn->owner)->fe->options & (PR_O_NULLNOLOG|PR_O_IGNORE_PRB)))
Willy Tarreauee4684f2021-06-17 08:08:48 +02003194 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02003195 }
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003196 goto done;
Willy Tarreau52eed752017-09-22 15:05:09 +02003197 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003198 TRACE_PROTO("received preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003199
3200 h2c->max_id = 0;
3201 h2c->st0 = H2_CS_SETTINGS1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003202 TRACE_STATE("switching to SETTINGS1", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003203 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003204
3205 if (h2c->st0 == H2_CS_SETTINGS1) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003206 /* ensure that what is pending is a valid SETTINGS frame
3207 * without an ACK.
3208 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003209 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 +02003210 if (!h2_get_frame_hdr(&h2c->dbuf, &hdr)) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003211 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003212 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau22de8d32018-09-05 19:55:58 +02003213 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003214 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 +02003215 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003216 if (!(h2c->flags & H2_CF_IS_BACK))
3217 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02003218 }
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003219 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003220 }
3221
3222 if (hdr.sid || hdr.ft != H2_FT_SETTINGS || hdr.ff & H2_F_SETTINGS_ACK) {
3223 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003224 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 +02003225 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
3226 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003227 if (!(h2c->flags & H2_CF_IS_BACK))
3228 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003229 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003230 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003231 }
3232
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003233 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003234 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003235 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 +02003236 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
3237 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003238 if (!(h2c->flags & H2_CF_IS_BACK))
3239 sess_log(h2c->conn->owner);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003240 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003241 }
3242
Willy Tarreau3bf69182018-12-21 15:34:50 +01003243 /* that's OK, switch to FRAME_P to process it. This is
3244 * a SETTINGS frame whose header has already been
3245 * deleted above.
3246 */
Willy Tarreau54f46e52019-01-30 15:11:03 +01003247 padlen = 0;
Willy Tarreau4781b152021-04-06 13:53:36 +02003248 HA_ATOMIC_INC(&h2c->px_counters->settings_rcvd);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003249 goto new_frame;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003250 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003251 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003252
3253 /* process as many incoming frames as possible below */
Willy Tarreau7838a792019-08-12 18:42:03 +02003254 while (1) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02003255 int ret = 0;
3256
Willy Tarreau7838a792019-08-12 18:42:03 +02003257 if (!b_data(&h2c->dbuf)) {
3258 TRACE_DEVEL("no more Rx data", H2_EV_RX_FRAME, h2c->conn);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003259 h2c->flags |= H2_CF_DEM_SHORT_READ;
3260 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003261 }
3262
3263 if (h2c->st0 >= H2_CS_ERROR) {
3264 TRACE_STATE("end of connection reported", H2_EV_RX_FRAME|H2_EV_RX_EOI, h2c->conn);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003265 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003266 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003267
3268 if (h2c->st0 == H2_CS_FRAME_H) {
Willy Tarreau30d05f32019-08-06 15:49:51 +02003269 h2c->rcvd_s = 0;
3270
Willy Tarreau7838a792019-08-12 18:42:03 +02003271 TRACE_STATE("expecting H2 frame header", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003272 if (!h2_peek_frame_hdr(&h2c->dbuf, 0, &hdr)) {
3273 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003274 break;
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003275 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003276
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003277 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003278 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 +02003279 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003280 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02003281 /* only log if no other stream can report the error */
3282 sess_log(h2c->conn->owner);
3283 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003284 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003285 break;
3286 }
3287
Christopher Fauletdd2a5622019-06-18 12:22:38 +02003288 padlen = 0;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003289 if (h2_ft_bit(hdr.ft) & H2_FT_PADDED_MASK && hdr.ff & H2_F_PADDED) {
3290 /* If the frame is padded (HEADERS, PUSH_PROMISE or DATA),
3291 * we read the pad length and drop it from the remaining
3292 * payload (one byte + the 9 remaining ones = 10 total
3293 * removed), so we have a frame payload starting after the
3294 * pad len. Flow controlled frames (DATA) also count the
3295 * padlen in the flow control, so it must be adjusted.
3296 */
3297 if (hdr.len < 1) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003298 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 +01003299 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003300 if (!(h2c->flags & H2_CF_IS_BACK))
3301 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003302 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003303 goto done;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003304 }
3305 hdr.len--;
3306
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003307 if (b_data(&h2c->dbuf) < 10) {
3308 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003309 break; // missing padlen
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003310 }
Willy Tarreau3bf69182018-12-21 15:34:50 +01003311
3312 padlen = *(uint8_t *)b_peek(&h2c->dbuf, 9);
3313
3314 if (padlen > hdr.len) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003315 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 +01003316 /* RFC7540#6.1 : pad length = length of
3317 * frame payload or greater => error.
3318 */
3319 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003320 if (!(h2c->flags & H2_CF_IS_BACK))
3321 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003322 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003323 goto done;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003324 }
3325
3326 if (h2_ft_bit(hdr.ft) & H2_FT_FC_MASK) {
3327 h2c->rcvd_c++;
3328 h2c->rcvd_s++;
3329 }
3330 b_del(&h2c->dbuf, 1);
3331 }
3332 h2_skip_frame_hdr(&h2c->dbuf);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003333
3334 new_frame:
Willy Tarreau7e98c052017-10-10 15:56:59 +02003335 h2c->dfl = hdr.len;
3336 h2c->dsi = hdr.sid;
3337 h2c->dft = hdr.ft;
3338 h2c->dff = hdr.ff;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003339 h2c->dpl = padlen;
Willy Tarreau73db4342019-09-25 07:28:44 +02003340 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 +02003341 h2c->st0 = H2_CS_FRAME_P;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003342
3343 /* check for minimum basic frame format validity */
3344 ret = h2_frame_check(h2c->dft, 1, h2c->dsi, h2c->dfl, global.tune.bufsize);
3345 if (ret != H2_ERR_NO_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003346 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 +01003347 h2c_error(h2c, ret);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003348 if (!(h2c->flags & H2_CF_IS_BACK))
3349 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003350 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003351 goto done;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003352 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003353 }
3354
Willy Tarreau9fd5aa82019-08-06 15:21:45 +02003355 /* Only H2_CS_FRAME_P, H2_CS_FRAME_A and H2_CS_FRAME_E here.
3356 * H2_CS_FRAME_P indicates an incomplete previous operation
3357 * (most often the first attempt) and requires some validity
3358 * checks for the frame and the current state. The two other
3359 * ones are set after completion (or abortion) and must skip
3360 * validity checks.
3361 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003362 tmp_h2s = h2c_st_by_id(h2c, h2c->dsi);
3363
Willy Tarreau567beb82018-12-18 16:52:44 +01003364 if (tmp_h2s != h2s && h2s && h2s->cs &&
3365 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003366 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003367 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003368 (h2s->flags & H2_SF_ES_RCVD) ||
3369 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003370 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003371 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 +01003372 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003373 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003374 }
3375 h2s = tmp_h2s;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003376
Willy Tarreau63864812019-08-07 14:25:20 +02003377 if (h2c->st0 == H2_CS_FRAME_E ||
Willy Tarreau7838a792019-08-12 18:42:03 +02003378 (h2c->st0 == H2_CS_FRAME_P && !h2_frame_check_vs_state(h2c, h2s))) {
3379 TRACE_PROTO("stream error reported", H2_EV_RX_FRAME|H2_EV_PROTO_ERR, h2c->conn, h2s);
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003380 goto strm_err;
Willy Tarreau7838a792019-08-12 18:42:03 +02003381 }
Willy Tarreauc0da1962017-10-30 18:38:00 +01003382
Willy Tarreau7e98c052017-10-10 15:56:59 +02003383 switch (h2c->dft) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02003384 case H2_FT_SETTINGS:
Willy Tarreau7838a792019-08-12 18:42:03 +02003385 if (h2c->st0 == H2_CS_FRAME_P) {
3386 TRACE_PROTO("receiving H2 SETTINGS frame", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn, h2s);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003387 ret = h2c_handle_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003388 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003389 HA_ATOMIC_INC(&h2c->px_counters->settings_rcvd);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003390
Willy Tarreau7838a792019-08-12 18:42:03 +02003391 if (h2c->st0 == H2_CS_FRAME_A) {
3392 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 +02003393 ret = h2c_ack_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003394 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003395 break;
3396
Willy Tarreaucf68c782017-10-10 17:11:41 +02003397 case H2_FT_PING:
Willy Tarreau7838a792019-08-12 18:42:03 +02003398 if (h2c->st0 == H2_CS_FRAME_P) {
3399 TRACE_PROTO("receiving H2 PING frame", H2_EV_RX_FRAME|H2_EV_RX_PING, h2c->conn, h2s);
Willy Tarreaucf68c782017-10-10 17:11:41 +02003400 ret = h2c_handle_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003401 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003402
Willy Tarreau7838a792019-08-12 18:42:03 +02003403 if (h2c->st0 == H2_CS_FRAME_A) {
3404 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 +02003405 ret = h2c_ack_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003406 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003407 break;
3408
Willy Tarreau26f95952017-07-27 17:18:30 +02003409 case H2_FT_WINDOW_UPDATE:
Willy Tarreau7838a792019-08-12 18:42:03 +02003410 if (h2c->st0 == H2_CS_FRAME_P) {
3411 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 +02003412 ret = h2c_handle_window_update(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003413 }
Willy Tarreau26f95952017-07-27 17:18:30 +02003414 break;
3415
Willy Tarreau61290ec2017-10-17 08:19:21 +02003416 case H2_FT_CONTINUATION:
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003417 /* RFC7540#6.10: CONTINUATION may only be preceded by
Willy Tarreauea18f862018-12-22 20:19:26 +01003418 * a HEADERS/PUSH_PROMISE/CONTINUATION frame. These
3419 * frames' parsers consume all following CONTINUATION
3420 * frames so this one is out of sequence.
Willy Tarreau61290ec2017-10-17 08:19:21 +02003421 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003422 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 +01003423 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003424 if (!(h2c->flags & H2_CF_IS_BACK))
3425 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003426 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003427 goto done;
Willy Tarreau61290ec2017-10-17 08:19:21 +02003428
Willy Tarreau13278b42017-10-13 19:23:14 +02003429 case H2_FT_HEADERS:
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003430 if (h2c->st0 == H2_CS_FRAME_P) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003431 TRACE_PROTO("receiving H2 HEADERS frame", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02003432 if (h2c->flags & H2_CF_IS_BACK)
3433 tmp_h2s = h2c_bck_handle_headers(h2c, h2s);
3434 else
3435 tmp_h2s = h2c_frt_handle_headers(h2c, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003436 if (tmp_h2s) {
3437 h2s = tmp_h2s;
3438 ret = 1;
3439 }
3440 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003441 HA_ATOMIC_INC(&h2c->px_counters->headers_rcvd);
Willy Tarreau13278b42017-10-13 19:23:14 +02003442 break;
3443
Willy Tarreau454f9052017-10-26 19:40:35 +02003444 case H2_FT_DATA:
Willy Tarreau7838a792019-08-12 18:42:03 +02003445 if (h2c->st0 == H2_CS_FRAME_P) {
3446 TRACE_PROTO("receiving H2 DATA frame", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01003447 ret = h2c_handle_data(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003448 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003449 HA_ATOMIC_INC(&h2c->px_counters->data_rcvd);
Willy Tarreau454f9052017-10-26 19:40:35 +02003450
Willy Tarreau7838a792019-08-12 18:42:03 +02003451 if (h2c->st0 == H2_CS_FRAME_A) {
3452 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 +02003453 ret = h2c_send_strm_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003454 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003455 break;
Willy Tarreaucd234e92017-08-18 10:59:39 +02003456
Willy Tarreau92153fc2017-12-03 19:46:19 +01003457 case H2_FT_PRIORITY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003458 if (h2c->st0 == H2_CS_FRAME_P) {
3459 TRACE_PROTO("receiving H2 PRIORITY frame", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn, h2s);
Willy Tarreau92153fc2017-12-03 19:46:19 +01003460 ret = h2c_handle_priority(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003461 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01003462 break;
3463
Willy Tarreaucd234e92017-08-18 10:59:39 +02003464 case H2_FT_RST_STREAM:
Willy Tarreau7838a792019-08-12 18:42:03 +02003465 if (h2c->st0 == H2_CS_FRAME_P) {
3466 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 +02003467 ret = h2c_handle_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003468 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003469 HA_ATOMIC_INC(&h2c->px_counters->rst_stream_rcvd);
Willy Tarreaucd234e92017-08-18 10:59:39 +02003470 break;
3471
Willy Tarreaue96b0922017-10-30 00:28:29 +01003472 case H2_FT_GOAWAY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003473 if (h2c->st0 == H2_CS_FRAME_P) {
3474 TRACE_PROTO("receiving H2 GOAWAY frame", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn, h2s);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003475 ret = h2c_handle_goaway(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003476 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003477 HA_ATOMIC_INC(&h2c->px_counters->goaway_rcvd);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003478 break;
3479
Willy Tarreau1c661982017-10-30 13:52:01 +01003480 /* implement all extra frame types here */
Willy Tarreau7e98c052017-10-10 15:56:59 +02003481 default:
Willy Tarreau7838a792019-08-12 18:42:03 +02003482 TRACE_PROTO("receiving H2 ignored frame", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003483 /* drop frames that we ignore. They may be larger than
3484 * the buffer so we drain all of their contents until
3485 * we reach the end.
3486 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003487 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3488 b_del(&h2c->dbuf, ret);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003489 h2c->dfl -= ret;
3490 ret = h2c->dfl == 0;
3491 }
3492
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003493 strm_err:
Willy Tarreaua20a5192017-12-27 11:02:06 +01003494 /* We may have to send an RST if not done yet */
Willy Tarreau7838a792019-08-12 18:42:03 +02003495 if (h2s->st == H2_SS_ERROR) {
3496 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 +01003497 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003498 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003499
Willy Tarreau7838a792019-08-12 18:42:03 +02003500 if (h2c->st0 == H2_CS_FRAME_E) {
3501 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 +01003502 ret = h2c_send_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003503 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003504
Willy Tarreau7e98c052017-10-10 15:56:59 +02003505 /* error or missing data condition met above ? */
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003506 if (ret <= 0)
Willy Tarreau7e98c052017-10-10 15:56:59 +02003507 break;
3508
3509 if (h2c->st0 != H2_CS_FRAME_H) {
Willy Tarreaubba7a4d2020-09-18 07:41:28 +02003510 if (h2c->dfl)
3511 TRACE_DEVEL("skipping remaining frame payload", H2_EV_RX_FRAME, h2c->conn, h2s);
Christopher Faulet5112a602019-09-26 16:38:28 +02003512 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3513 b_del(&h2c->dbuf, ret);
3514 h2c->dfl -= ret;
3515 if (!h2c->dfl) {
3516 TRACE_STATE("switching to FRAME_H", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
3517 h2c->st0 = H2_CS_FRAME_H;
3518 h2c->dsi = -1;
3519 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003520 }
3521 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003522
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003523 if (h2c->rcvd_c > 0 &&
Willy Tarreau7838a792019-08-12 18:42:03 +02003524 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))) {
3525 TRACE_PROTO("sending H2 WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003526 h2c_send_conn_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003527 }
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003528
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003529 done:
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003530 if (h2c->st0 >= H2_CS_ERROR || (h2c->flags & H2_CF_DEM_SHORT_READ)) {
3531 if (h2c->flags & H2_CF_RCVD_SHUT)
3532 h2c->flags |= H2_CF_END_REACHED;
3533 }
3534
Willy Tarreau567beb82018-12-18 16:52:44 +01003535 if (h2s && h2s->cs &&
3536 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003537 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003538 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003539 (h2s->flags & H2_SF_ES_RCVD) ||
3540 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003541 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003542 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 +01003543 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003544 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003545 }
Willy Tarreau1ed87b72018-11-25 08:45:16 +01003546
Willy Tarreau7838a792019-08-12 18:42:03 +02003547 if (old_iw != h2c->miw) {
3548 TRACE_STATE("notifying streams about SFCTL increase", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003549 h2c_unblock_sfctl(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003550 }
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003551
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003552 h2c_restart_reading(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02003553 out:
3554 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003555 return;
Willy Tarreaubc933932017-10-09 16:21:43 +02003556}
3557
Willy Tarreau989539b2020-01-10 17:01:29 +01003558/* resume each h2s eligible for sending in list head <head> */
3559static void h2_resume_each_sending_h2s(struct h2c *h2c, struct list *head)
3560{
3561 struct h2s *h2s, *h2s_back;
3562
3563 TRACE_ENTER(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3564
3565 list_for_each_entry_safe(h2s, h2s_back, head, list) {
3566 if (h2c->mws <= 0 ||
3567 h2c->flags & H2_CF_MUX_BLOCK_ANY ||
3568 h2c->st0 >= H2_CS_ERROR)
3569 break;
3570
3571 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003572
Willy Tarreaud9464162020-01-10 18:25:07 +01003573 if (h2s->flags & H2_SF_NOTIFIED)
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003574 continue;
3575
Willy Tarreau5723f292020-01-10 15:16:57 +01003576 /* If the sender changed his mind and unsubscribed, let's just
3577 * remove the stream from the send_list.
Willy Tarreau989539b2020-01-10 17:01:29 +01003578 */
Willy Tarreauf96508a2020-01-10 11:12:48 +01003579 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) &&
3580 (!h2s->subs || !(h2s->subs->events & SUB_RETRY_SEND))) {
Willy Tarreau989539b2020-01-10 17:01:29 +01003581 LIST_DEL_INIT(&h2s->list);
3582 continue;
3583 }
3584
Willy Tarreauf96508a2020-01-10 11:12:48 +01003585 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau5723f292020-01-10 15:16:57 +01003586 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01003587 tasklet_wakeup(h2s->subs->tasklet);
3588 h2s->subs->events &= ~SUB_RETRY_SEND;
3589 if (!h2s->subs->events)
3590 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01003591 }
3592 else if (h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) {
3593 tasklet_wakeup(h2s->shut_tl);
3594 }
Willy Tarreau989539b2020-01-10 17:01:29 +01003595 }
3596
3597 TRACE_LEAVE(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3598}
3599
Willy Tarreaubc933932017-10-09 16:21:43 +02003600/* process Tx frames from streams to be multiplexed. Returns > 0 if it reached
3601 * the end.
3602 */
3603static int h2_process_mux(struct h2c *h2c)
3604{
Willy Tarreau7838a792019-08-12 18:42:03 +02003605 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3606
Willy Tarreau01b44822018-10-03 14:26:37 +02003607 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3608 if (unlikely(h2c->st0 == H2_CS_PREFACE && (h2c->flags & H2_CF_IS_BACK))) {
3609 if (unlikely(h2c_bck_send_preface(h2c) <= 0)) {
3610 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003611 if (h2c->st0 == H2_CS_ERROR)
Willy Tarreau01b44822018-10-03 14:26:37 +02003612 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau01b44822018-10-03 14:26:37 +02003613 goto fail;
3614 }
3615 h2c->st0 = H2_CS_SETTINGS1;
3616 }
3617 /* need to wait for the other side */
Willy Tarreau75a930a2018-12-12 08:03:58 +01003618 if (h2c->st0 < H2_CS_FRAME_H)
Willy Tarreau7838a792019-08-12 18:42:03 +02003619 goto done;
Willy Tarreau01b44822018-10-03 14:26:37 +02003620 }
3621
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003622 /* start by sending possibly pending window updates */
Willy Tarreaue74679a2019-08-06 15:39:32 +02003623 if (h2c->rcvd_s > 0 &&
3624 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3625 h2c_send_strm_wu(h2c) < 0)
3626 goto fail;
3627
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003628 if (h2c->rcvd_c > 0 &&
3629 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3630 h2c_send_conn_wu(h2c) < 0)
3631 goto fail;
3632
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003633 /* First we always process the flow control list because the streams
3634 * waiting there were already elected for immediate emission but were
3635 * blocked just on this.
3636 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003637 h2_resume_each_sending_h2s(h2c, &h2c->fctl_list);
3638 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003639
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003640 fail:
Willy Tarreau3eabe9b2017-11-07 11:03:01 +01003641 if (unlikely(h2c->st0 >= H2_CS_ERROR)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02003642 if (h2c->st0 == H2_CS_ERROR) {
3643 if (h2c->max_id >= 0) {
3644 h2c_send_goaway_error(h2c, NULL);
3645 if (h2c->flags & H2_CF_MUX_BLOCK_ANY)
Willy Tarreau7838a792019-08-12 18:42:03 +02003646 goto out0;
Willy Tarreau081d4722017-05-16 21:51:05 +02003647 }
3648
3649 h2c->st0 = H2_CS_ERROR2; // sent (or failed hard) !
3650 }
Willy Tarreau081d4722017-05-16 21:51:05 +02003651 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003652 done:
3653 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
3654 return 1;
3655 out0:
3656 TRACE_DEVEL("leaving in blocked situation", H2_EV_H2C_WAKE, h2c->conn);
3657 return 0;
Willy Tarreaubc933932017-10-09 16:21:43 +02003658}
3659
Willy Tarreau62f52692017-10-08 23:01:42 +02003660
Willy Tarreau479998a2018-11-18 06:30:59 +01003661/* Attempt to read data, and subscribe if none available.
3662 * The function returns 1 if data has been received, otherwise zero.
3663 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003664static int h2_recv(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003665{
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003666 struct connection *conn = h2c->conn;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003667 struct buffer *buf;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003668 int max;
Olivier Houchard7505f942018-08-21 18:10:44 +02003669 size_t ret;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003670
Willy Tarreau7838a792019-08-12 18:42:03 +02003671 TRACE_ENTER(H2_EV_H2C_RECV, h2c->conn);
3672
3673 if (h2c->wait_event.events & SUB_RETRY_RECV) {
3674 TRACE_DEVEL("leaving on sub_recv", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003675 return (b_data(&h2c->dbuf));
Willy Tarreau7838a792019-08-12 18:42:03 +02003676 }
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003677
Willy Tarreau7838a792019-08-12 18:42:03 +02003678 if (!h2_recv_allowed(h2c)) {
3679 TRACE_DEVEL("leaving on !recv_allowed", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003680 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003681 }
Willy Tarreaua2af5122017-10-09 11:56:46 +02003682
Willy Tarreau44e973f2018-03-01 17:49:30 +01003683 buf = h2_get_buf(h2c, &h2c->dbuf);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003684 if (!buf) {
3685 h2c->flags |= H2_CF_DEM_DALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02003686 TRACE_DEVEL("leaving on !alloc", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003687 return 0;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003688 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003689
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003690 if (h2c->flags & H2_CF_RCVD_SHUT) {
3691 TRACE_DEVEL("leaving on rcvd_shut", H2_EV_H2C_RECV, h2c->conn);
3692 return 0;
3693 }
3694
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003695 if (!b_data(buf)) {
3696 /* try to pre-align the buffer like the
3697 * rxbufs will be to optimize memory copies. We'll make
3698 * sure that the frame header lands at the end of the
3699 * HTX block to alias it upon recv. We cannot use the
3700 * head because rcv_buf() will realign the buffer if
3701 * it's empty. Thus we cheat and pretend we already
3702 * have a few bytes there.
3703 */
3704 max = buf_room_for_htx_data(buf) + 9;
3705 buf->head = sizeof(struct htx) - 9;
3706 }
3707 else
3708 max = b_room(buf);
Willy Tarreau2a59e872018-12-12 08:23:47 +01003709
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003710 ret = max ? conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0) : 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003711
Christopher Fauletde9d6052021-04-23 12:25:18 +02003712 if (max && !ret && h2_recv_allowed(h2c)) {
3713 TRACE_DATA("failed to receive data, subscribing", H2_EV_H2C_RECV, h2c->conn);
3714 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h2c->wait_event);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003715 } else if (ret) {
Willy Tarreau022e5e52020-09-10 09:33:15 +02003716 TRACE_DATA("received data", H2_EV_H2C_RECV, h2c->conn, 0, 0, (void*)(long)ret);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003717 h2c->flags &= ~H2_CF_DEM_SHORT_READ;
3718 }
Olivier Houchard81a15af2018-10-19 17:26:49 +02003719
Christopher Fauletde9d6052021-04-23 12:25:18 +02003720 if (conn_xprt_read0_pending(h2c->conn)) {
3721 TRACE_DATA("received read0", H2_EV_H2C_RECV, h2c->conn);
3722 h2c->flags |= H2_CF_RCVD_SHUT;
3723 }
3724
Olivier Houcharda1411e62018-08-17 18:42:48 +02003725 if (!b_data(buf)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +01003726 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02003727 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard46677732018-11-29 17:06:17 +01003728 return (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003729 }
3730
Willy Tarreau7838a792019-08-12 18:42:03 +02003731 if (b_data(buf) == buf->size) {
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003732 h2c->flags |= H2_CF_DEM_DFULL;
Willy Tarreau35fb8462019-10-02 11:05:46 +02003733 TRACE_STATE("demux buffer full", H2_EV_H2C_RECV|H2_EV_H2C_BLK, h2c->conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003734 }
3735
3736 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003737 return !!ret || (conn->flags & CO_FL_ERROR) || conn_xprt_read0_pending(conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003738}
3739
Willy Tarreau479998a2018-11-18 06:30:59 +01003740/* Try to send data if possible.
3741 * The function returns 1 if data have been sent, otherwise zero.
3742 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003743static int h2_send(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003744{
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003745 struct connection *conn = h2c->conn;
Willy Tarreaubc933932017-10-09 16:21:43 +02003746 int done;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003747 int sent = 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003748
Willy Tarreau7838a792019-08-12 18:42:03 +02003749 TRACE_ENTER(H2_EV_H2C_SEND, h2c->conn);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003750
Willy Tarreau7838a792019-08-12 18:42:03 +02003751 if (conn->flags & CO_FL_ERROR) {
3752 TRACE_DEVEL("leaving on error", H2_EV_H2C_SEND, h2c->conn);
3753 return 1;
3754 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003755
Willy Tarreau911db9b2020-01-23 16:27:54 +01003756 if (conn->flags & CO_FL_WAIT_XPRT) {
Willy Tarreaua2af5122017-10-09 11:56:46 +02003757 /* a handshake was requested */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003758 goto schedule;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003759 }
3760
Willy Tarreaubc933932017-10-09 16:21:43 +02003761 /* This loop is quite simple : it tries to fill as much as it can from
3762 * pending streams into the existing buffer until it's reportedly full
3763 * or the end of send requests is reached. Then it tries to send this
3764 * buffer's contents out, marks it not full if at least one byte could
3765 * be sent, and tries again.
3766 *
3767 * The snd_buf() function normally takes a "flags" argument which may
3768 * be made of a combination of CO_SFL_MSG_MORE to indicate that more
3769 * data immediately comes and CO_SFL_STREAMER to indicate that the
3770 * connection is streaming lots of data (used to increase TLS record
3771 * size at the expense of latency). The former can be sent any time
3772 * there's a buffer full flag, as it indicates at least one stream
3773 * attempted to send and failed so there are pending data. An
3774 * alternative would be to set it as long as there's an active stream
3775 * but that would be problematic for ACKs until we have an absolute
3776 * guarantee that all waiters have at least one byte to send. The
3777 * latter should possibly not be set for now.
3778 */
3779
3780 done = 0;
3781 while (!done) {
3782 unsigned int flags = 0;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003783 unsigned int released = 0;
3784 struct buffer *buf;
Willy Tarreaubc933932017-10-09 16:21:43 +02003785
3786 /* fill as much as we can into the current buffer */
3787 while (((h2c->flags & (H2_CF_MUX_MFULL|H2_CF_MUX_MALLOC)) == 0) && !done)
3788 done = h2_process_mux(h2c);
3789
Olivier Houchard2b094432019-01-29 18:28:36 +01003790 if (h2c->flags & H2_CF_MUX_MALLOC)
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003791 done = 1; // we won't go further without extra buffers
Olivier Houchard2b094432019-01-29 18:28:36 +01003792
Christopher Faulet9a3d3fc2020-10-22 16:24:58 +02003793 if ((conn->flags & (CO_FL_SOCK_WR_SH|CO_FL_ERROR)) ||
Willy Tarreaue6dc7a02021-10-21 17:30:06 +02003794 (h2c->flags & H2_CF_GOAWAY_FAILED))
Willy Tarreaubc933932017-10-09 16:21:43 +02003795 break;
3796
3797 if (h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))
3798 flags |= CO_SFL_MSG_MORE;
3799
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003800 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3801 if (b_data(buf)) {
3802 int ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, buf, b_data(buf), flags);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003803 if (!ret) {
3804 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003805 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003806 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003807 sent = 1;
Willy Tarreau022e5e52020-09-10 09:33:15 +02003808 TRACE_DATA("sent data", H2_EV_H2C_SEND, h2c->conn, 0, buf, (void*)(long)ret);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003809 b_del(buf, ret);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003810 if (b_data(buf)) {
3811 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003812 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003813 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003814 }
3815 b_free(buf);
3816 released++;
Willy Tarreau787db9a2018-06-14 18:31:46 +02003817 }
Willy Tarreaubc933932017-10-09 16:21:43 +02003818
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003819 if (released)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01003820 offer_buffers(NULL, released);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003821
Willy Tarreaubc933932017-10-09 16:21:43 +02003822 /* wrote at least one byte, the buffer is not full anymore */
Christopher Faulet69fe5ce2019-10-24 10:31:01 +02003823 if (sent)
3824 h2c->flags &= ~(H2_CF_MUX_MFULL | H2_CF_DEM_MROOM);
Willy Tarreaubc933932017-10-09 16:21:43 +02003825 }
3826
Willy Tarreaua2af5122017-10-09 11:56:46 +02003827 if (conn->flags & CO_FL_SOCK_WR_SH) {
3828 /* output closed, nothing to send, clear the buffer to release it */
Willy Tarreau51330962019-05-26 09:38:07 +02003829 b_reset(br_tail(h2c->mbuf));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003830 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02003831 /* We're not full anymore, so we can wake any task that are waiting
3832 * for us.
3833 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003834 if (!(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM)) && h2c->st0 >= H2_CS_FRAME_H)
3835 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01003836
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003837 /* We're done, no more to send */
Willy Tarreau7838a792019-08-12 18:42:03 +02003838 if (!br_data(h2c->mbuf)) {
3839 TRACE_DEVEL("leaving with everything sent", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003840 return sent;
Willy Tarreau7838a792019-08-12 18:42:03 +02003841 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003842schedule:
Willy Tarreau7838a792019-08-12 18:42:03 +02003843 if (!(conn->flags & CO_FL_ERROR) && !(h2c->wait_event.events & SUB_RETRY_SEND)) {
3844 TRACE_STATE("more data to send, subscribing", H2_EV_H2C_SEND, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003845 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003846 }
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003847
Willy Tarreau7838a792019-08-12 18:42:03 +02003848 TRACE_DEVEL("leaving with some data left to send", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003849 return sent;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003850}
3851
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003852/* this is the tasklet referenced in h2c->wait_event.tasklet */
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003853struct task *h2_io_cb(struct task *t, void *ctx, unsigned int state)
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003854{
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003855 struct connection *conn;
3856 struct tasklet *tl = (struct tasklet *)t;
3857 int conn_in_list;
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003858 struct h2c *h2c = ctx;
Olivier Houchard7505f942018-08-21 18:10:44 +02003859 int ret = 0;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003860
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003861 if (state & TASK_F_USR1) {
3862 /* the tasklet was idling on an idle connection, it might have
3863 * been stolen, let's be careful!
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003864 */
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003865 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3866 if (t->context == NULL) {
3867 /* The connection has been taken over by another thread,
3868 * we're no longer responsible for it, so just free the
3869 * tasklet, and do nothing.
3870 */
3871 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3872 tasklet_free(tl);
Willy Tarreau74163142021-03-13 11:30:19 +01003873 t = NULL;
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003874 goto leave;
3875 }
3876 conn = h2c->conn;
3877 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003878
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003879 conn_in_list = conn->flags & CO_FL_LIST_MASK;
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003880
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003881 /* Remove the connection from the list, to be sure nobody attempts
3882 * to use it while we handle the I/O events
3883 */
3884 if (conn_in_list)
3885 conn_delete_from_tree(&conn->hash_node->node);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003886
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003887 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3888 } else {
3889 /* we're certain the connection was not in an idle list */
3890 conn = h2c->conn;
3891 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3892 conn_in_list = 0;
3893 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003894
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003895 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchard7505f942018-08-21 18:10:44 +02003896 ret = h2_send(h2c);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003897 if (!(h2c->wait_event.events & SUB_RETRY_RECV))
Olivier Houchard7505f942018-08-21 18:10:44 +02003898 ret |= h2_recv(h2c);
Willy Tarreaucef5c8e2018-12-18 10:29:54 +01003899 if (ret || b_data(&h2c->dbuf))
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003900 ret = h2_process(h2c);
3901
3902 /* If we were in an idle list, we want to add it back into it,
3903 * unless h2_process() returned -1, which mean it has destroyed
3904 * the connection (testing !ret is enough, if h2_process() wasn't
3905 * called then ret will be 0 anyway.
3906 */
Willy Tarreau74163142021-03-13 11:30:19 +01003907 if (ret < 0)
3908 t = NULL;
3909
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003910 if (!ret && conn_in_list) {
3911 struct server *srv = objt_server(conn->target);
3912
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01003913 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003914 if (conn_in_list == CO_FL_SAFE_LIST)
Willy Tarreau430bf4a2021-03-04 09:45:32 +01003915 ebmb_insert(&srv->per_thr[tid].safe_conns, &conn->hash_node->node, sizeof(conn->hash_node->hash));
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003916 else
Willy Tarreau430bf4a2021-03-04 09:45:32 +01003917 ebmb_insert(&srv->per_thr[tid].idle_conns, &conn->hash_node->node, sizeof(conn->hash_node->hash));
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01003918 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003919 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003920
Willy Tarreau38468772020-06-28 00:31:13 +02003921leave:
Willy Tarreau7838a792019-08-12 18:42:03 +02003922 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreau74163142021-03-13 11:30:19 +01003923 return t;
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003924}
Willy Tarreaua2af5122017-10-09 11:56:46 +02003925
Willy Tarreau62f52692017-10-08 23:01:42 +02003926/* callback called on any event by the connection handler.
3927 * It applies changes and returns zero, or < 0 if it wants immediate
3928 * destruction of the connection (which normally doesn not happen in h2).
3929 */
Olivier Houchard7505f942018-08-21 18:10:44 +02003930static int h2_process(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003931{
Olivier Houchard7505f942018-08-21 18:10:44 +02003932 struct connection *conn = h2c->conn;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003933
Willy Tarreau7838a792019-08-12 18:42:03 +02003934 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3935
Willy Tarreauf0961222021-02-05 11:41:46 +01003936 if (!(h2c->flags & H2_CF_DEM_BLOCK_ANY) &&
3937 (b_data(&h2c->dbuf) || (h2c->flags & H2_CF_RCVD_SHUT))) {
Willy Tarreaud13bf272017-12-14 10:34:52 +01003938 h2_process_demux(h2c);
3939
3940 if (h2c->st0 >= H2_CS_ERROR || conn->flags & CO_FL_ERROR)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003941 b_reset(&h2c->dbuf);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003942
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003943 if (!b_full(&h2c->dbuf))
Willy Tarreaud13bf272017-12-14 10:34:52 +01003944 h2c->flags &= ~H2_CF_DEM_DFULL;
3945 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003946 h2_send(h2c);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003947
Christopher Fauletdfd10ab2021-10-06 14:24:19 +02003948 if (unlikely(h2c->proxy->flags & (PR_FL_DISABLED|PR_FL_STOPPED)) && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau8ec14062017-12-30 18:08:13 +01003949 /* frontend is stopping, reload likely in progress, let's try
3950 * to announce a graceful shutdown if not yet done. We don't
3951 * care if it fails, it will be tried again later.
3952 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003953 TRACE_STATE("proxy stopped, sending GOAWAY", H2_EV_H2C_WAKE|H2_EV_TX_FRAME, conn);
Willy Tarreau8ec14062017-12-30 18:08:13 +01003954 if (!(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
3955 if (h2c->last_sid < 0)
3956 h2c->last_sid = (1U << 31) - 1;
3957 h2c_send_goaway_error(h2c, NULL);
3958 }
3959 }
3960
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003961 /*
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003962 * If we received early data, and the handshake is done, wake
3963 * any stream that was waiting for it.
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003964 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003965 if (!(h2c->flags & H2_CF_WAIT_FOR_HS) &&
Willy Tarreau911db9b2020-01-23 16:27:54 +01003966 (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 +01003967 struct eb32_node *node;
3968 struct h2s *h2s;
3969
3970 h2c->flags |= H2_CF_WAIT_FOR_HS;
3971 node = eb32_lookup_ge(&h2c->streams_by_id, 1);
3972
3973 while (node) {
3974 h2s = container_of(node, struct h2s, by_id);
Willy Tarreaufde287c2018-12-19 18:33:16 +01003975 if (h2s->cs && h2s->cs->flags & CS_FL_WAIT_FOR_HS)
Willy Tarreau7e094452018-12-19 18:08:52 +01003976 h2s_notify_recv(h2s);
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003977 node = eb32_next(node);
3978 }
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003979 }
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003980
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003981 if (conn->flags & CO_FL_ERROR || h2c_read0_pending(h2c) ||
Willy Tarreau29a98242017-10-31 06:59:15 +01003982 h2c->st0 == H2_CS_ERROR2 || h2c->flags & H2_CF_GOAWAY_FAILED ||
3983 (eb_is_empty(&h2c->streams_by_id) && h2c->last_sid >= 0 &&
3984 h2c->max_id >= h2c->last_sid)) {
Willy Tarreau23482912019-05-07 15:23:14 +02003985 h2_wake_some_streams(h2c, 0);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003986
3987 if (eb_is_empty(&h2c->streams_by_id)) {
3988 /* no more stream, kill the connection now */
Christopher Faulet73c12072019-04-08 11:23:22 +02003989 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003990 TRACE_DEVEL("leaving after releasing the connection", H2_EV_H2C_WAKE);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003991 return -1;
3992 }
Willy Tarreau4481e262019-10-31 15:36:30 +01003993
3994 /* connections in error must be removed from the idle lists */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01003995 if (conn->flags & CO_FL_LIST_MASK) {
3996 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01003997 conn_delete_from_tree(&conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01003998 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3999 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004000 }
4001 else if (h2c->st0 == H2_CS_ERROR) {
4002 /* connections in error must be removed from the idle lists */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004003 if (conn->flags & CO_FL_LIST_MASK) {
4004 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004005 conn_delete_from_tree(&conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004006 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4007 }
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004008 }
4009
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004010 if (!b_data(&h2c->dbuf))
Willy Tarreau44e973f2018-03-01 17:49:30 +01004011 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004012
Olivier Houchard53216e72018-10-10 15:46:36 +02004013 if ((conn->flags & CO_FL_SOCK_WR_SH) ||
4014 h2c->st0 == H2_CS_ERROR2 || (h2c->flags & H2_CF_GOAWAY_FAILED) ||
4015 (h2c->st0 != H2_CS_ERROR &&
Willy Tarreau662fafc2019-05-26 09:43:07 +02004016 !br_data(h2c->mbuf) &&
Olivier Houchard53216e72018-10-10 15:46:36 +02004017 (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) &&
4018 ((h2c->flags & H2_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&h2c->send_list))))
Willy Tarreau2e3c0002019-05-26 09:45:23 +02004019 h2_release_mbuf(h2c);
Willy Tarreaua2af5122017-10-09 11:56:46 +02004020
Willy Tarreau3f133572017-10-31 19:21:06 +01004021 if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02004022 if (h2c_may_expire(h2c))
4023 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
4024 else
4025 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02004026 task_queue(h2c->task);
Willy Tarreauea392822017-10-31 10:02:25 +01004027 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02004028
Olivier Houchard7505f942018-08-21 18:10:44 +02004029 h2_send(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004030 TRACE_LEAVE(H2_EV_H2C_WAKE, conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02004031 return 0;
4032}
4033
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004034/* wake-up function called by the connection layer (mux_ops.wake) */
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004035static int h2_wake(struct connection *conn)
4036{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004037 struct h2c *h2c = conn->ctx;
Willy Tarreau7838a792019-08-12 18:42:03 +02004038 int ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004039
Willy Tarreau7838a792019-08-12 18:42:03 +02004040 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
4041 ret = h2_process(h2c);
Willy Tarreau508f9892020-02-11 04:38:56 +01004042 if (ret >= 0)
4043 h2_wake_some_streams(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02004044 TRACE_LEAVE(H2_EV_H2C_WAKE);
4045 return ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004046}
4047
Willy Tarreauea392822017-10-31 10:02:25 +01004048/* Connection timeout management. The principle is that if there's no receipt
4049 * nor sending for a certain amount of time, the connection is closed. If the
4050 * MUX buffer still has lying data or is not allocatable, the connection is
4051 * immediately killed. If it's allocatable and empty, we attempt to send a
4052 * GOAWAY frame.
4053 */
Willy Tarreau144f84a2021-03-02 16:09:26 +01004054struct task *h2_timeout_task(struct task *t, void *context, unsigned int state)
Willy Tarreauea392822017-10-31 10:02:25 +01004055{
Olivier Houchard9f6af332018-05-25 14:04:04 +02004056 struct h2c *h2c = context;
Willy Tarreauea392822017-10-31 10:02:25 +01004057 int expired = tick_is_expired(t->expire, now_ms);
4058
Willy Tarreau7838a792019-08-12 18:42:03 +02004059 TRACE_ENTER(H2_EV_H2C_WAKE, h2c ? h2c->conn : NULL);
4060
Willy Tarreaubd42e922020-06-30 11:19:23 +02004061 if (h2c) {
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004062 /* Make sure nobody stole the connection from us */
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004063 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004064
4065 /* Somebody already stole the connection from us, so we should not
4066 * free it, we just have to free the task.
4067 */
4068 if (!t->context) {
4069 h2c = NULL;
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004070 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004071 goto do_leave;
4072 }
4073
4074
Willy Tarreaubd42e922020-06-30 11:19:23 +02004075 if (!expired) {
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004076 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004077 TRACE_DEVEL("leaving (not expired)", H2_EV_H2C_WAKE, h2c->conn);
4078 return t;
4079 }
Willy Tarreauea392822017-10-31 10:02:25 +01004080
Willy Tarreaubd42e922020-06-30 11:19:23 +02004081 if (!h2c_may_expire(h2c)) {
4082 /* we do still have streams but all of them are idle, waiting
4083 * for the data layer, so we must not enforce the timeout here.
4084 */
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004085 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004086 t->expire = TICK_ETERNITY;
4087 return t;
4088 }
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02004089
Willy Tarreaubd42e922020-06-30 11:19:23 +02004090 /* We're about to destroy the connection, so make sure nobody attempts
4091 * to steal it from us.
4092 */
Willy Tarreaubd42e922020-06-30 11:19:23 +02004093 if (h2c->conn->flags & CO_FL_LIST_MASK)
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004094 conn_delete_from_tree(&h2c->conn->hash_node->node);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004095
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004096 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004097 }
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004098
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004099do_leave:
Olivier Houchard3f795f72019-04-17 22:51:06 +02004100 task_destroy(t);
Willy Tarreau0975f112018-03-29 15:22:59 +02004101
4102 if (!h2c) {
4103 /* resources were already deleted */
Willy Tarreau7838a792019-08-12 18:42:03 +02004104 TRACE_DEVEL("leaving (not more h2c)", H2_EV_H2C_WAKE);
Willy Tarreau0975f112018-03-29 15:22:59 +02004105 return NULL;
4106 }
4107
4108 h2c->task = NULL;
Willy Tarreauea392822017-10-31 10:02:25 +01004109 h2c_error(h2c, H2_ERR_NO_ERROR);
Willy Tarreau23482912019-05-07 15:23:14 +02004110 h2_wake_some_streams(h2c, 0);
Willy Tarreauea392822017-10-31 10:02:25 +01004111
Willy Tarreau662fafc2019-05-26 09:43:07 +02004112 if (br_data(h2c->mbuf)) {
Willy Tarreauea392822017-10-31 10:02:25 +01004113 /* don't even try to send a GOAWAY, the buffer is stuck */
4114 h2c->flags |= H2_CF_GOAWAY_FAILED;
4115 }
4116
4117 /* try to send but no need to insist */
Willy Tarreau599391a2017-11-24 10:16:00 +01004118 h2c->last_sid = h2c->max_id;
Willy Tarreauea392822017-10-31 10:02:25 +01004119 if (h2c_send_goaway_error(h2c, NULL) <= 0)
4120 h2c->flags |= H2_CF_GOAWAY_FAILED;
4121
Willy Tarreau662fafc2019-05-26 09:43:07 +02004122 if (br_data(h2c->mbuf) && !(h2c->flags & H2_CF_GOAWAY_FAILED) && conn_xprt_ready(h2c->conn)) {
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004123 unsigned int released = 0;
4124 struct buffer *buf;
4125
4126 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
4127 if (b_data(buf)) {
4128 int ret = h2c->conn->xprt->snd_buf(h2c->conn, h2c->conn->xprt_ctx, buf, b_data(buf), 0);
4129 if (!ret)
4130 break;
4131 b_del(buf, ret);
4132 if (b_data(buf))
4133 break;
4134 b_free(buf);
4135 released++;
4136 }
Willy Tarreau787db9a2018-06-14 18:31:46 +02004137 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004138
4139 if (released)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01004140 offer_buffers(NULL, released);
Willy Tarreau787db9a2018-06-14 18:31:46 +02004141 }
Willy Tarreauea392822017-10-31 10:02:25 +01004142
Willy Tarreau4481e262019-10-31 15:36:30 +01004143 /* in any case this connection must not be considered idle anymore */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004144 if (h2c->conn->flags & CO_FL_LIST_MASK) {
4145 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004146 conn_delete_from_tree(&h2c->conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004147 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4148 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004149
Willy Tarreau0975f112018-03-29 15:22:59 +02004150 /* either we can release everything now or it will be done later once
4151 * the last stream closes.
4152 */
4153 if (eb_is_empty(&h2c->streams_by_id))
Christopher Faulet73c12072019-04-08 11:23:22 +02004154 h2_release(h2c);
Willy Tarreauea392822017-10-31 10:02:25 +01004155
Willy Tarreau7838a792019-08-12 18:42:03 +02004156 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreauea392822017-10-31 10:02:25 +01004157 return NULL;
4158}
4159
4160
Willy Tarreau62f52692017-10-08 23:01:42 +02004161/*******************************************/
4162/* functions below are used by the streams */
4163/*******************************************/
4164
4165/*
4166 * Attach a new stream to a connection
4167 * (Used for outgoing connections)
4168 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01004169static struct conn_stream *h2_attach(struct connection *conn, struct session *sess)
Willy Tarreau62f52692017-10-08 23:01:42 +02004170{
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004171 struct conn_stream *cs;
4172 struct h2s *h2s;
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004173 struct h2c *h2c = conn->ctx;
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004174
Willy Tarreau7838a792019-08-12 18:42:03 +02004175 TRACE_ENTER(H2_EV_H2S_NEW, conn);
Christopher Faulet236c93b2020-07-02 09:19:54 +02004176 cs = cs_new(conn, conn->target);
Willy Tarreau7838a792019-08-12 18:42:03 +02004177 if (!cs) {
4178 TRACE_DEVEL("leaving on CS allocation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004179 return NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004180 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01004181 h2s = h2c_bck_stream_new(h2c, cs, sess);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004182 if (!h2s) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004183 TRACE_DEVEL("leaving on stream creation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004184 cs_free(cs);
4185 return NULL;
4186 }
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004187
4188 /* the connection is not idle anymore, let's mark this */
4189 HA_ATOMIC_AND(&h2c->wait_event.tasklet->state, ~TASK_F_USR1);
Willy Tarreau4f8cd432021-03-02 17:27:58 +01004190 xprt_set_used(h2c->conn, h2c->conn->xprt, h2c->conn->xprt_ctx);
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004191
Willy Tarreau7838a792019-08-12 18:42:03 +02004192 TRACE_LEAVE(H2_EV_H2S_NEW, conn, h2s);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004193 return cs;
Willy Tarreau62f52692017-10-08 23:01:42 +02004194}
4195
Willy Tarreaufafd3982018-11-18 21:29:20 +01004196/* Retrieves the first valid conn_stream from this connection, or returns NULL.
4197 * We have to scan because we may have some orphan streams. It might be
4198 * beneficial to scan backwards from the end to reduce the likeliness to find
4199 * orphans.
4200 */
4201static const struct conn_stream *h2_get_first_cs(const struct connection *conn)
4202{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004203 struct h2c *h2c = conn->ctx;
Willy Tarreaufafd3982018-11-18 21:29:20 +01004204 struct h2s *h2s;
4205 struct eb32_node *node;
4206
4207 node = eb32_first(&h2c->streams_by_id);
4208 while (node) {
4209 h2s = container_of(node, struct h2s, by_id);
4210 if (h2s->cs)
4211 return h2s->cs;
4212 node = eb32_next(node);
4213 }
4214 return NULL;
4215}
4216
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004217static int h2_ctl(struct connection *conn, enum mux_ctl_type mux_ctl, void *output)
4218{
4219 int ret = 0;
4220 struct h2c *h2c = conn->ctx;
4221
4222 switch (mux_ctl) {
4223 case MUX_STATUS:
4224 /* Only consider the mux to be ready if we're done with
4225 * the preface and settings, and we had no error.
4226 */
4227 if (h2c->st0 >= H2_CS_FRAME_H && h2c->st0 < H2_CS_ERROR)
4228 ret |= MUX_STATUS_READY;
4229 return ret;
Christopher Faulet4c8ad842020-10-06 14:59:17 +02004230 case MUX_EXIT_STATUS:
4231 return MUX_ES_UNKNOWN;
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004232 default:
4233 return -1;
4234 }
4235}
4236
Willy Tarreau62f52692017-10-08 23:01:42 +02004237/*
Olivier Houchard060ed432018-11-06 16:32:42 +01004238 * Destroy the mux and the associated connection, if it is no longer used
4239 */
Christopher Faulet73c12072019-04-08 11:23:22 +02004240static void h2_destroy(void *ctx)
Olivier Houchard060ed432018-11-06 16:32:42 +01004241{
Christopher Faulet73c12072019-04-08 11:23:22 +02004242 struct h2c *h2c = ctx;
Olivier Houchard060ed432018-11-06 16:32:42 +01004243
Willy Tarreau7838a792019-08-12 18:42:03 +02004244 TRACE_ENTER(H2_EV_H2C_END, h2c->conn);
Christopher Faulet39a96ee2019-04-08 10:52:21 +02004245 if (eb_is_empty(&h2c->streams_by_id) || !h2c->conn || h2c->conn->ctx != h2c)
Christopher Faulet73c12072019-04-08 11:23:22 +02004246 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004247 TRACE_LEAVE(H2_EV_H2C_END);
Olivier Houchard060ed432018-11-06 16:32:42 +01004248}
4249
4250/*
Willy Tarreau62f52692017-10-08 23:01:42 +02004251 * Detach the stream from the connection and possibly release the connection.
4252 */
4253static void h2_detach(struct conn_stream *cs)
4254{
Willy Tarreau60935142017-10-16 18:11:19 +02004255 struct h2s *h2s = cs->ctx;
4256 struct h2c *h2c;
Olivier Houchardf502aca2018-12-14 19:42:40 +01004257 struct session *sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004258
Willy Tarreau7838a792019-08-12 18:42:03 +02004259 TRACE_ENTER(H2_EV_STRM_END, h2s ? h2s->h2c->conn : NULL, h2s);
4260
Willy Tarreau60935142017-10-16 18:11:19 +02004261 cs->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004262 if (!h2s) {
4263 TRACE_LEAVE(H2_EV_STRM_END);
Willy Tarreau60935142017-10-16 18:11:19 +02004264 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004265 }
Willy Tarreau60935142017-10-16 18:11:19 +02004266
Willy Tarreaud9464162020-01-10 18:25:07 +01004267 /* there's no txbuf so we're certain not to be able to send anything */
4268 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02004269
Olivier Houchardf502aca2018-12-14 19:42:40 +01004270 sess = h2s->sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004271 h2c = h2s->h2c;
4272 h2s->cs = NULL;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02004273 h2c->nb_cs--;
Willy Tarreaufa1d3572019-01-31 10:31:51 +01004274 if ((h2c->flags & (H2_CF_IS_BACK|H2_CF_DEM_TOOMANY)) == H2_CF_DEM_TOOMANY &&
4275 !h2_frt_has_too_many_cs(h2c)) {
4276 /* frontend connection was blocking new streams creation */
Willy Tarreauf2101912018-07-19 10:11:38 +02004277 h2c->flags &= ~H2_CF_DEM_TOOMANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004278 h2c_restart_reading(h2c, 1);
Willy Tarreauf2101912018-07-19 10:11:38 +02004279 }
Willy Tarreau60935142017-10-16 18:11:19 +02004280
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004281 /* this stream may be blocked waiting for some data to leave (possibly
4282 * an ES or RST frame), so orphan it in this case.
4283 */
Willy Tarreau3041fcc2018-03-29 15:41:32 +02004284 if (!(cs->conn->flags & CO_FL_ERROR) &&
Willy Tarreaua2b51812018-07-27 09:55:14 +02004285 (h2c->st0 < H2_CS_ERROR) &&
Willy Tarreau5723f292020-01-10 15:16:57 +01004286 (h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL)) &&
Willy Tarreauf96508a2020-01-10 11:12:48 +01004287 ((h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) || h2s->subs)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004288 TRACE_DEVEL("leaving on stream blocked", H2_EV_STRM_END|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004289 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004290 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004291
Willy Tarreau45f752e2017-10-30 15:44:59 +01004292 if ((h2c->flags & H2_CF_DEM_BLOCK_ANY && h2s->id == h2c->dsi) ||
4293 (h2c->flags & H2_CF_MUX_BLOCK_ANY && h2s->id == h2c->msi)) {
4294 /* unblock the connection if it was blocked on this
4295 * stream.
4296 */
4297 h2c->flags &= ~H2_CF_DEM_BLOCK_ANY;
4298 h2c->flags &= ~H2_CF_MUX_BLOCK_ANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004299 h2c_restart_reading(h2c, 1);
Willy Tarreau45f752e2017-10-30 15:44:59 +01004300 }
4301
Willy Tarreau71049cc2018-03-28 13:56:39 +02004302 h2s_destroy(h2s);
Willy Tarreau60935142017-10-16 18:11:19 +02004303
Christopher Faulet9b79a102019-07-15 11:22:56 +02004304 if (h2c->flags & H2_CF_IS_BACK) {
Olivier Houchard8a786902018-12-15 16:05:40 +01004305 if (!(h2c->conn->flags &
4306 (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH))) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004307 if (h2c->conn->flags & CO_FL_PRIVATE) {
Christopher Faulet08016ab2020-07-01 16:10:06 +02004308 /* Add the connection in the session server list, if not already done */
4309 if (!session_add_conn(sess, h2c->conn, h2c->conn->target)) {
4310 h2c->conn->owner = NULL;
4311 if (eb_is_empty(&h2c->streams_by_id)) {
4312 h2c->conn->mux->destroy(h2c);
4313 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4314 return;
Christopher Fauletc5579d12020-07-01 15:45:41 +02004315 }
4316 }
Christopher Faulet08016ab2020-07-01 16:10:06 +02004317 if (eb_is_empty(&h2c->streams_by_id)) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004318 if (session_check_idle_conn(h2c->conn->owner, h2c->conn) != 0) {
4319 /* At this point either the connection is destroyed, or it's been added to the server idle list, just stop */
4320 TRACE_DEVEL("leaving without reusable idle connection", H2_EV_STRM_END);
Olivier Houchard351411f2018-12-27 17:20:54 +01004321 return;
4322 }
4323 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004324 }
Christopher Fauletc5579d12020-07-01 15:45:41 +02004325 else {
4326 if (eb_is_empty(&h2c->streams_by_id)) {
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004327 /* If the connection is owned by the session, first remove it
4328 * from its list
4329 */
4330 if (h2c->conn->owner) {
4331 session_unown_conn(h2c->conn->owner, h2c->conn);
4332 h2c->conn->owner = NULL;
4333 }
4334
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004335 /* mark that the tasklet may lose its context to another thread and
4336 * that the handler needs to check it under the idle conns lock.
4337 */
4338 HA_ATOMIC_OR(&h2c->wait_event.tasklet->state, TASK_F_USR1);
Willy Tarreau4f8cd432021-03-02 17:27:58 +01004339 xprt_set_idle(h2c->conn, h2c->conn->xprt, h2c->conn->xprt_ctx);
4340
Olivier Houcharddc2f2752020-02-13 19:12:07 +01004341 if (!srv_add_to_idle_list(objt_server(h2c->conn->target), h2c->conn, 1)) {
Olivier Houchard2444aa52020-01-20 13:56:01 +01004342 /* The server doesn't want it, let's kill the connection right away */
4343 h2c->conn->mux->destroy(h2c);
4344 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4345 return;
4346 }
Olivier Houchard199d4fa2020-03-22 23:25:51 +01004347 /* At this point, the connection has been added to the
4348 * server idle list, so another thread may already have
4349 * hijacked it, so we can't do anything with it.
4350 */
Olivier Houchard2444aa52020-01-20 13:56:01 +01004351 TRACE_DEVEL("reusable idle connection", H2_EV_STRM_END);
4352 return;
Olivier Houchard8a786902018-12-15 16:05:40 +01004353
Olivier Houchard8a786902018-12-15 16:05:40 +01004354 }
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004355 else if (!h2c->conn->hash_node->node.node.leaf_p &&
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004356 h2_avail_streams(h2c->conn) > 0 && objt_server(h2c->conn->target) &&
Willy Tarreau2b718102021-04-21 07:32:39 +02004357 !LIST_INLIST(&h2c->conn->session_list)) {
Willy Tarreau430bf4a2021-03-04 09:45:32 +01004358 ebmb_insert(&__objt_server(h2c->conn->target)->per_thr[tid].avail_conns,
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004359 &h2c->conn->hash_node->node,
4360 sizeof(h2c->conn->hash_node->hash));
Christopher Fauletc5579d12020-07-01 15:45:41 +02004361 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004362 }
4363 }
4364 }
4365
Willy Tarreaue323f342018-03-28 13:51:45 +02004366 /* We don't want to close right now unless we're removing the
4367 * last stream, and either the connection is in error, or it
4368 * reached the ID already specified in a GOAWAY frame received
4369 * or sent (as seen by last_sid >= 0).
4370 */
Olivier Houchard7a977432019-03-21 15:47:13 +01004371 if (h2c_is_dead(h2c)) {
Willy Tarreaue323f342018-03-28 13:51:45 +02004372 /* no more stream will come, kill it now */
Willy Tarreau7838a792019-08-12 18:42:03 +02004373 TRACE_DEVEL("leaving and killing dead connection", H2_EV_STRM_END, h2c->conn);
Christopher Faulet73c12072019-04-08 11:23:22 +02004374 h2_release(h2c);
Willy Tarreaue323f342018-03-28 13:51:45 +02004375 }
4376 else if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02004377 if (h2c_may_expire(h2c))
4378 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
4379 else
4380 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02004381 task_queue(h2c->task);
Willy Tarreau7838a792019-08-12 18:42:03 +02004382 TRACE_DEVEL("leaving, refreshing connection's timeout", H2_EV_STRM_END, h2c->conn);
Willy Tarreau60935142017-10-16 18:11:19 +02004383 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004384 else
4385 TRACE_DEVEL("leaving", H2_EV_STRM_END, h2c->conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02004386}
4387
Willy Tarreau88bdba32019-05-13 18:17:53 +02004388/* Performs a synchronous or asynchronous shutr(). */
4389static void h2_do_shutr(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004390{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004391 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004392
Willy Tarreauf983d002019-05-14 10:40:21 +02004393 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004394 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004395
Willy Tarreau7838a792019-08-12 18:42:03 +02004396 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4397
Willy Tarreau18059042019-01-31 19:12:48 +01004398 /* a connstream may require us to immediately kill the whole connection
4399 * for example because of a "tcp-request content reject" rule that is
4400 * normally used to limit abuse. In this case we schedule a goaway to
4401 * close the connection.
Willy Tarreau926fa4c2017-11-07 14:42:12 +01004402 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004403 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004404 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004405 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004406 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4407 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4408 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004409 else if (!(h2s->flags & H2_SF_HEADERS_SENT)) {
4410 /* Nothing was never sent for this stream, so reset with
4411 * REFUSED_STREAM error to let the client retry the
4412 * request.
4413 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004414 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004415 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4416 }
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004417 else {
4418 /* a final response was already provided, we don't want this
4419 * stream anymore. This may happen when the server responds
4420 * before the end of an upload and closes quickly (redirect,
4421 * deny, ...)
4422 */
4423 h2s_error(h2s, H2_ERR_CANCEL);
4424 }
Willy Tarreau18059042019-01-31 19:12:48 +01004425
Willy Tarreau90c32322017-11-24 08:00:30 +01004426 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004427 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004428 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004429
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004430 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004431 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau00dd0782018-03-01 16:31:34 +01004432 h2s_close(h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004433 done:
4434 h2s->flags &= ~H2_SF_WANT_SHUTR;
Willy Tarreau7838a792019-08-12 18:42:03 +02004435 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004436 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004437add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004438 /* Let the handler know we want to shutr, and add ourselves to the
4439 * most relevant list if not yet done. h2_deferred_shut() will be
4440 * automatically called via the shut_tl tasklet when there's room
4441 * again.
4442 */
4443 h2s->flags |= H2_SF_WANT_SHUTR;
Willy Tarreau2b718102021-04-21 07:32:39 +02004444 if (!LIST_INLIST(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004445 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02004446 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004447 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Willy Tarreau2b718102021-04-21 07:32:39 +02004448 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004449 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004450 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004451 return;
Willy Tarreau62f52692017-10-08 23:01:42 +02004452}
4453
Willy Tarreau88bdba32019-05-13 18:17:53 +02004454/* Performs a synchronous or asynchronous shutw(). */
4455static void h2_do_shutw(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004456{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004457 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004458
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004459 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004460 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004461
Willy Tarreau7838a792019-08-12 18:42:03 +02004462 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4463
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004464 if (h2s->st != H2_SS_ERROR && (h2s->flags & H2_SF_HEADERS_SENT)) {
Willy Tarreau58e32082017-11-07 14:41:09 +01004465 /* we can cleanly close using an empty data frame only after headers */
4466
4467 if (!(h2s->flags & (H2_SF_ES_SENT|H2_SF_RST_SENT)) &&
4468 h2_send_empty_data_es(h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004469 goto add_to_list;
Willy Tarreau58e32082017-11-07 14:41:09 +01004470
4471 if (h2s->st == H2_SS_HREM)
Willy Tarreau00dd0782018-03-01 16:31:34 +01004472 h2s_close(h2s);
Willy Tarreau58e32082017-11-07 14:41:09 +01004473 else
4474 h2s->st = H2_SS_HLOC;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004475 } else {
Willy Tarreau18059042019-01-31 19:12:48 +01004476 /* a connstream may require us to immediately kill the whole connection
4477 * for example because of a "tcp-request content reject" rule that is
4478 * normally used to limit abuse. In this case we schedule a goaway to
4479 * close the connection.
Willy Tarreaua1349f02017-10-31 07:41:55 +01004480 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004481 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004482 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004483 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004484 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4485 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4486 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004487 else {
4488 /* Nothing was never sent for this stream, so reset with
4489 * REFUSED_STREAM error to let the client retry the
4490 * request.
4491 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004492 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004493 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4494 }
Willy Tarreau18059042019-01-31 19:12:48 +01004495
Willy Tarreau90c32322017-11-24 08:00:30 +01004496 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004497 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004498 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004499
Willy Tarreau00dd0782018-03-01 16:31:34 +01004500 h2s_close(h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004501 }
4502
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004503 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004504 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau7838a792019-08-12 18:42:03 +02004505
4506 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
4507
Willy Tarreau88bdba32019-05-13 18:17:53 +02004508 done:
4509 h2s->flags &= ~H2_SF_WANT_SHUTW;
4510 return;
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004511
4512 add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004513 /* Let the handler know we want to shutw, and add ourselves to the
4514 * most relevant list if not yet done. h2_deferred_shut() will be
4515 * automatically called via the shut_tl tasklet when there's room
4516 * again.
4517 */
4518 h2s->flags |= H2_SF_WANT_SHUTW;
Willy Tarreau2b718102021-04-21 07:32:39 +02004519 if (!LIST_INLIST(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004520 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02004521 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004522 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Willy Tarreau2b718102021-04-21 07:32:39 +02004523 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004524 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004525 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004526 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004527}
4528
Willy Tarreau5723f292020-01-10 15:16:57 +01004529/* This is the tasklet referenced in h2s->shut_tl, it is used for
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004530 * deferred shutdowns when the h2_detach() was done but the mux buffer was full
4531 * and prevented the last frame from being emitted.
4532 */
Willy Tarreau144f84a2021-03-02 16:09:26 +01004533struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned int state)
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004534{
4535 struct h2s *h2s = ctx;
Willy Tarreau88bdba32019-05-13 18:17:53 +02004536 struct h2c *h2c = h2s->h2c;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004537
Willy Tarreau7838a792019-08-12 18:42:03 +02004538 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4539
Willy Tarreau5723f292020-01-10 15:16:57 +01004540 if (h2s->flags & H2_SF_NOTIFIED) {
4541 /* some data processing remains to be done first */
4542 goto end;
4543 }
4544
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004545 if (h2s->flags & H2_SF_WANT_SHUTW)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004546 h2_do_shutw(h2s);
4547
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004548 if (h2s->flags & H2_SF_WANT_SHUTR)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004549 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004550
Willy Tarreau88bdba32019-05-13 18:17:53 +02004551 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004552 /* We're done trying to send, remove ourself from the send_list */
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004553 LIST_DEL_INIT(&h2s->list);
Olivier Houchard7a977432019-03-21 15:47:13 +01004554
Willy Tarreau88bdba32019-05-13 18:17:53 +02004555 if (!h2s->cs) {
4556 h2s_destroy(h2s);
Willy Tarreau74163142021-03-13 11:30:19 +01004557 if (h2c_is_dead(h2c)) {
Willy Tarreau88bdba32019-05-13 18:17:53 +02004558 h2_release(h2c);
Willy Tarreau74163142021-03-13 11:30:19 +01004559 t = NULL;
4560 }
Willy Tarreau88bdba32019-05-13 18:17:53 +02004561 }
Olivier Houchard7a977432019-03-21 15:47:13 +01004562 }
Willy Tarreau5723f292020-01-10 15:16:57 +01004563 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02004564 TRACE_LEAVE(H2_EV_STRM_SHUT);
Willy Tarreau74163142021-03-13 11:30:19 +01004565 return t;
Willy Tarreau62f52692017-10-08 23:01:42 +02004566}
4567
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004568/* shutr() called by the conn_stream (mux_ops.shutr) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004569static void h2_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
4570{
4571 struct h2s *h2s = cs->ctx;
4572
Willy Tarreau7838a792019-08-12 18:42:03 +02004573 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004574 if (cs->flags & CS_FL_KILL_CONN)
4575 h2s->flags |= H2_SF_KILL_CONN;
4576
Willy Tarreau7838a792019-08-12 18:42:03 +02004577 if (mode)
4578 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004579
Willy Tarreau7838a792019-08-12 18:42:03 +02004580 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004581}
4582
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004583/* shutw() called by the conn_stream (mux_ops.shutw) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004584static void h2_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
4585{
4586 struct h2s *h2s = cs->ctx;
4587
Willy Tarreau7838a792019-08-12 18:42:03 +02004588 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004589 if (cs->flags & CS_FL_KILL_CONN)
4590 h2s->flags |= H2_SF_KILL_CONN;
4591
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004592 h2_do_shutw(h2s);
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
Christopher Faulet9b79a102019-07-15 11:22:56 +02004596/* Decode the payload of a HEADERS frame and produce the HTX request or response
4597 * depending on the connection's side. Returns a positive value on success, a
4598 * negative value on failure, or 0 if it couldn't proceed. May report connection
4599 * errors in h2c->errcode if the frame is non-decodable and the connection
4600 * unrecoverable. In absence of connection error when a failure is reported, the
4601 * caller must assume a stream error.
Willy Tarreauea18f862018-12-22 20:19:26 +01004602 *
4603 * The function may fold CONTINUATION frames into the initial HEADERS frame
4604 * by removing padding and next frame header, then moving the CONTINUATION
4605 * frame's payload and adjusting h2c->dfl to match the new aggregated frame,
4606 * leaving a hole between the main frame and the beginning of the next one.
4607 * The possibly remaining incomplete or next frame at the end may be moved
4608 * if the aggregated frame is not deleted, in order to fill the hole. Wrapped
4609 * HEADERS frames are unwrapped into a temporary buffer before decoding.
4610 *
4611 * A buffer at the beginning of processing may look like this :
4612 *
4613 * ,---.---------.-----.--------------.--------------.------.---.
4614 * |///| HEADERS | PAD | CONTINUATION | CONTINUATION | DATA |///|
4615 * `---^---------^-----^--------------^--------------^------^---'
4616 * | | <-----> | |
4617 * area | dpl | wrap
4618 * |<--------------> |
4619 * | dfl |
4620 * |<-------------------------------------------------->|
4621 * head data
4622 *
4623 * Padding is automatically overwritten when folding, participating to the
4624 * hole size after dfl :
4625 *
4626 * ,---.------------------------.-----.--------------.------.---.
4627 * |///| HEADERS : CONTINUATION |/////| CONTINUATION | DATA |///|
4628 * `---^------------------------^-----^--------------^------^---'
4629 * | | <-----> | |
4630 * area | hole | wrap
4631 * |<-----------------------> |
4632 * | dfl |
4633 * |<-------------------------------------------------->|
4634 * head data
4635 *
4636 * Please note that the HEADERS frame is always deprived from its PADLEN byte
4637 * however it may start with the 5 stream-dep+weight bytes in case of PRIORITY
4638 * bit.
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004639 *
4640 * The <flags> field must point to either the stream's flags or to a copy of it
4641 * so that the function can update the following flags :
4642 * - H2_SF_DATA_CLEN when content-length is seen
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004643 * - H2_SF_HEADERS_RCVD once the frame is successfully decoded
Willy Tarreau88d138e2019-01-02 19:38:14 +01004644 *
4645 * The H2_SF_HEADERS_RCVD flag is also looked at in the <flags> field prior to
4646 * decoding, in order to detect if we're dealing with a headers or a trailers
4647 * block (the trailers block appears after H2_SF_HEADERS_RCVD was seen).
Willy Tarreau13278b42017-10-13 19:23:14 +02004648 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01004649static 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 +02004650{
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004651 const uint8_t *hdrs = (uint8_t *)b_head(&h2c->dbuf);
Willy Tarreau83061a82018-07-13 11:56:34 +02004652 struct buffer *tmp = get_trash_chunk();
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004653 struct http_hdr list[global.tune.max_http_hdr * 2];
Willy Tarreau83061a82018-07-13 11:56:34 +02004654 struct buffer *copy = NULL;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004655 unsigned int msgf;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004656 struct htx *htx = NULL;
Willy Tarreauea18f862018-12-22 20:19:26 +01004657 int flen; // header frame len
4658 int hole = 0;
Willy Tarreau86277d42019-01-02 15:36:11 +01004659 int ret = 0;
4660 int outlen;
Willy Tarreau13278b42017-10-13 19:23:14 +02004661 int wrap;
Willy Tarreau13278b42017-10-13 19:23:14 +02004662
Willy Tarreau7838a792019-08-12 18:42:03 +02004663 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
4664
Willy Tarreauea18f862018-12-22 20:19:26 +01004665next_frame:
4666 if (b_data(&h2c->dbuf) - hole < h2c->dfl)
4667 goto leave; // incomplete input frame
4668
4669 /* No END_HEADERS means there's one or more CONTINUATION frames. In
4670 * this case, we'll try to paste it immediately after the initial
4671 * HEADERS frame payload and kill any possible padding. The initial
4672 * frame's length will be increased to represent the concatenation
4673 * of the two frames. The next frame is read from position <tlen>
4674 * and written at position <flen> (minus padding if some is present).
4675 */
4676 if (unlikely(!(h2c->dff & H2_F_HEADERS_END_HEADERS))) {
4677 struct h2_fh hdr;
4678 int clen; // CONTINUATION frame's payload length
4679
Willy Tarreau7838a792019-08-12 18:42:03 +02004680 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 +01004681 if (!h2_peek_frame_hdr(&h2c->dbuf, h2c->dfl + hole, &hdr)) {
4682 /* no more data, the buffer may be full, either due to
4683 * too large a frame or because of too large a hole that
4684 * we're going to compact at the end.
4685 */
4686 goto leave;
4687 }
4688
4689 if (hdr.ft != H2_FT_CONTINUATION) {
4690 /* RFC7540#6.10: frame of unexpected type */
Willy Tarreau7838a792019-08-12 18:42:03 +02004691 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 +01004692 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004693 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreauea18f862018-12-22 20:19:26 +01004694 goto fail;
4695 }
4696
4697 if (hdr.sid != h2c->dsi) {
4698 /* RFC7540#6.10: frame of different stream */
Willy Tarreau7838a792019-08-12 18:42:03 +02004699 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 +01004700 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004701 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreauea18f862018-12-22 20:19:26 +01004702 goto fail;
4703 }
4704
4705 if ((unsigned)hdr.len > (unsigned)global.tune.bufsize) {
4706 /* RFC7540#4.2: invalid frame length */
Willy Tarreau7838a792019-08-12 18:42:03 +02004707 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 +01004708 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4709 goto fail;
4710 }
4711
4712 /* detect when we must stop aggragating frames */
4713 h2c->dff |= hdr.ff & H2_F_HEADERS_END_HEADERS;
4714
4715 /* Take as much as we can of the CONTINUATION frame's payload */
4716 clen = b_data(&h2c->dbuf) - (h2c->dfl + hole + 9);
4717 if (clen > hdr.len)
4718 clen = hdr.len;
4719
4720 /* Move the frame's payload over the padding, hole and frame
4721 * header. At least one of hole or dpl is null (see diagrams
4722 * above). The hole moves after the new aggragated frame.
4723 */
4724 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 +02004725 h2c->dfl += hdr.len - h2c->dpl;
Willy Tarreauea18f862018-12-22 20:19:26 +01004726 hole += h2c->dpl + 9;
4727 h2c->dpl = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004728 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 +01004729 goto next_frame;
4730 }
4731
4732 flen = h2c->dfl - h2c->dpl;
Willy Tarreau68472622017-12-11 18:36:37 +01004733
Willy Tarreau13278b42017-10-13 19:23:14 +02004734 /* if the input buffer wraps, take a temporary copy of it (rare) */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004735 wrap = b_wrap(&h2c->dbuf) - b_head(&h2c->dbuf);
Willy Tarreau13278b42017-10-13 19:23:14 +02004736 if (wrap < h2c->dfl) {
Willy Tarreau68dd9852017-07-03 14:44:26 +02004737 copy = alloc_trash_chunk();
4738 if (!copy) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004739 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 +02004740 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
4741 goto fail;
4742 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004743 memcpy(copy->area, b_head(&h2c->dbuf), wrap);
4744 memcpy(copy->area + wrap, b_orig(&h2c->dbuf), h2c->dfl - wrap);
4745 hdrs = (uint8_t *) copy->area;
Willy Tarreau13278b42017-10-13 19:23:14 +02004746 }
4747
Willy Tarreau13278b42017-10-13 19:23:14 +02004748 /* Skip StreamDep and weight for now (we don't support PRIORITY) */
4749 if (h2c->dff & H2_F_HEADERS_PRIORITY) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004750 if (read_n32(hdrs) == h2c->dsi) {
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004751 /* RFC7540#5.3.1 : stream dep may not depend on itself */
Willy Tarreau7838a792019-08-12 18:42:03 +02004752 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 +01004753 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004754 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreaua0d11b62018-09-05 18:30:05 +02004755 goto fail;
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004756 }
4757
Willy Tarreaua01f45e2018-12-31 07:41:24 +01004758 if (flen < 5) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004759 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 +01004760 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4761 goto fail;
4762 }
4763
Willy Tarreau13278b42017-10-13 19:23:14 +02004764 hdrs += 5; // stream dep = 4, weight = 1
4765 flen -= 5;
4766 }
4767
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004768 if (!h2_get_buf(h2c, rxbuf)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004769 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 +01004770 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau86277d42019-01-02 15:36:11 +01004771 goto leave;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004772 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004773
Willy Tarreau937f7602018-02-26 15:22:17 +01004774 /* we can't retry a failed decompression operation so we must be very
4775 * careful not to take any risks. In practice the output buffer is
4776 * always empty except maybe for trailers, in which case we simply have
4777 * to wait for the upper layer to finish consuming what is available.
4778 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004779 htx = htx_from_buf(rxbuf);
4780 if (!htx_is_empty(htx)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004781 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 +02004782 h2c->flags |= H2_CF_DEM_SFULL;
4783 goto leave;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004784 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004785
Willy Tarreau25919232019-01-03 14:48:18 +01004786 /* past this point we cannot roll back in case of error */
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004787 outlen = hpack_decode_frame(h2c->ddht, hdrs, flen, list,
4788 sizeof(list)/sizeof(list[0]), tmp);
4789 if (outlen < 0) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004790 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 +01004791 h2c_error(h2c, H2_ERR_COMPRESSION_ERROR);
4792 goto fail;
4793 }
4794
Willy Tarreau25919232019-01-03 14:48:18 +01004795 /* The PACK decompressor was updated, let's update the input buffer and
4796 * the parser's state to commit these changes and allow us to later
4797 * fail solely on the stream if needed.
4798 */
4799 b_del(&h2c->dbuf, h2c->dfl + hole);
4800 h2c->dfl = hole = 0;
4801 h2c->st0 = H2_CS_FRAME_H;
4802
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004803 /* OK now we have our header list in <list> */
Willy Tarreau880f5802019-01-03 08:10:14 +01004804 msgf = (h2c->dff & H2_F_HEADERS_END_STREAM) ? 0 : H2_MSGF_BODY;
Christopher Fauletd0db4232021-01-22 11:46:30 +01004805 msgf |= (*flags & H2_SF_BODY_TUNNEL) ? H2_MSGF_BODY_TUNNEL: 0;
Amaury Denoyelle74162742020-12-11 17:53:05 +01004806 /* If an Extended CONNECT has been sent on this stream, set message flag
Ilya Shipitsinacf84592021-02-06 22:29:08 +05004807 * to convert 200 response to 101 htx response */
Amaury Denoyelle74162742020-12-11 17:53:05 +01004808 msgf |= (*flags & H2_SF_EXT_CONNECT_SENT) ? H2_MSGF_EXT_CONNECT: 0;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004809
Willy Tarreau88d138e2019-01-02 19:38:14 +01004810 if (*flags & H2_SF_HEADERS_RCVD)
4811 goto trailers;
4812
4813 /* This is the first HEADERS frame so it's a headers block */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004814 if (h2c->flags & H2_CF_IS_BACK)
Amaury Denoyelle74162742020-12-11 17:53:05 +01004815 outlen = h2_make_htx_response(list, htx, &msgf, body_len, upgrade_protocol);
Christopher Faulet9b79a102019-07-15 11:22:56 +02004816 else
4817 outlen = h2_make_htx_request(list, htx, &msgf, body_len);
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004818
Christopher Faulet3d875582021-04-26 17:46:13 +02004819 if (outlen < 0 || htx_free_space(htx) < global.tune.maxrewrite) {
Willy Tarreau25919232019-01-03 14:48:18 +01004820 /* too large headers? this is a stream error only */
Christopher Faulet3d875582021-04-26 17:46:13 +02004821 TRACE_STATE("message headers too large", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2S_ERR|H2_EV_PROTO_ERR, h2c->conn);
4822 htx->flags |= HTX_FL_PARSING_ERROR;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004823 goto fail;
4824 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004825
Willy Tarreau174b06a2018-04-25 18:13:58 +02004826 if (msgf & H2_MSGF_BODY) {
4827 /* a payload is present */
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004828 if (msgf & H2_MSGF_BODY_CL) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004829 *flags |= H2_SF_DATA_CLEN;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004830 htx->extra = *body_len;
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004831 }
Willy Tarreau174b06a2018-04-25 18:13:58 +02004832 }
Christopher Faulet7d247f02020-12-02 14:26:36 +01004833 if (msgf & H2_MSGF_BODYLESS_RSP)
4834 *flags |= H2_SF_BODYLESS_RESP;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004835
Christopher Fauletd0db4232021-01-22 11:46:30 +01004836 if (msgf & H2_MSGF_BODY_TUNNEL)
4837 *flags |= H2_SF_BODY_TUNNEL;
4838 else {
4839 /* Abort the tunnel attempt, if any */
4840 if (*flags & H2_SF_BODY_TUNNEL)
4841 *flags |= H2_SF_TUNNEL_ABRT;
4842 *flags &= ~H2_SF_BODY_TUNNEL;
4843 }
4844
Willy Tarreau88d138e2019-01-02 19:38:14 +01004845 done:
Christopher Faulet0b465482019-02-19 15:14:23 +01004846 /* indicate that a HEADERS frame was received for this stream, except
4847 * for 1xx responses. For 1xx responses, another HEADERS frame is
4848 * expected.
4849 */
4850 if (!(msgf & H2_MSGF_RSP_1XX))
4851 *flags |= H2_SF_HEADERS_RCVD;
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004852
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004853 if (h2c->dff & H2_F_HEADERS_END_STREAM) {
4854 /* no more data are expected for this message */
4855 htx->flags |= HTX_FL_EOM;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004856 }
Willy Tarreau937f7602018-02-26 15:22:17 +01004857
Amaury Denoyelleefe22762020-12-11 17:53:08 +01004858 if (msgf & H2_MSGF_EXT_CONNECT)
4859 *flags |= H2_SF_EXT_CONNECT_RCVD;
4860
Willy Tarreau86277d42019-01-02 15:36:11 +01004861 /* success */
4862 ret = 1;
4863
Willy Tarreau68dd9852017-07-03 14:44:26 +02004864 leave:
Willy Tarreau86277d42019-01-02 15:36:11 +01004865 /* If there is a hole left and it's not at the end, we are forced to
Willy Tarreauea18f862018-12-22 20:19:26 +01004866 * move the remaining data over it.
4867 */
4868 if (hole) {
4869 if (b_data(&h2c->dbuf) > h2c->dfl + hole)
4870 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole),
4871 b_data(&h2c->dbuf) - (h2c->dfl + hole), -hole);
4872 b_sub(&h2c->dbuf, hole);
4873 }
4874
Christopher Faulet07f88d72021-04-21 10:39:53 +02004875 if (b_full(&h2c->dbuf) && h2c->dfl) {
Willy Tarreauea18f862018-12-22 20:19:26 +01004876 /* too large frames */
4877 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau86277d42019-01-02 15:36:11 +01004878 ret = -1;
Willy Tarreauea18f862018-12-22 20:19:26 +01004879 }
4880
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004881 if (htx)
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004882 htx_to_buf(htx, rxbuf);
Willy Tarreau68dd9852017-07-03 14:44:26 +02004883 free_trash_chunk(copy);
Willy Tarreau7838a792019-08-12 18:42:03 +02004884 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau86277d42019-01-02 15:36:11 +01004885 return ret;
4886
Willy Tarreau68dd9852017-07-03 14:44:26 +02004887 fail:
Willy Tarreau86277d42019-01-02 15:36:11 +01004888 ret = -1;
Willy Tarreau68dd9852017-07-03 14:44:26 +02004889 goto leave;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004890
4891 trailers:
4892 /* This is the last HEADERS frame hence a trailer */
Willy Tarreau88d138e2019-01-02 19:38:14 +01004893 if (!(h2c->dff & H2_F_HEADERS_END_STREAM)) {
4894 /* It's a trailer but it's missing ES flag */
Willy Tarreau7838a792019-08-12 18:42:03 +02004895 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 +01004896 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004897 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau88d138e2019-01-02 19:38:14 +01004898 goto fail;
4899 }
4900
Christopher Faulet9b79a102019-07-15 11:22:56 +02004901 /* Trailers terminate a DATA sequence */
Willy Tarreau7838a792019-08-12 18:42:03 +02004902 if (h2_make_htx_trailers(list, htx) <= 0) {
4903 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 +02004904 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004905 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01004906 goto done;
Willy Tarreau13278b42017-10-13 19:23:14 +02004907}
4908
Christopher Faulet9b79a102019-07-15 11:22:56 +02004909/* Transfer the payload of a DATA frame to the HTTP/1 side. The HTTP/2 frame
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004910 * parser state is automatically updated. Returns > 0 if it could completely
4911 * send the current frame, 0 if it couldn't complete, in which case
4912 * CS_FL_RCV_MORE must be checked to know if some data remain pending (an empty
4913 * DATA frame can return 0 as a valid result). Stream errors are reported in
4914 * h2s->errcode and connection errors in h2c->errcode. The caller must already
4915 * have checked the frame header and ensured that the frame was complete or the
4916 * buffer full. It changes the frame state to FRAME_A once done.
Willy Tarreau454f9052017-10-26 19:40:35 +02004917 */
Willy Tarreau454b57b2018-02-26 15:50:05 +01004918static int h2_frt_transfer_data(struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02004919{
4920 struct h2c *h2c = h2s->h2c;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004921 int block;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004922 unsigned int flen = 0;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004923 struct htx *htx = NULL;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004924 struct buffer *csbuf;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004925 unsigned int sent;
Willy Tarreau454f9052017-10-26 19:40:35 +02004926
Willy Tarreau7838a792019-08-12 18:42:03 +02004927 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
4928
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004929 h2c->flags &= ~H2_CF_DEM_SFULL;
Willy Tarreau454f9052017-10-26 19:40:35 +02004930
Olivier Houchard638b7992018-08-16 15:41:52 +02004931 csbuf = h2_get_buf(h2c, &h2s->rxbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004932 if (!csbuf) {
4933 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02004934 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 +01004935 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004936 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004937 htx = htx_from_buf(csbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004938
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004939try_again:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004940 flen = h2c->dfl - h2c->dpl;
4941 if (!flen)
Willy Tarreau4a28da12018-01-04 14:41:00 +01004942 goto end_transfer;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004943
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004944 if (flen > b_data(&h2c->dbuf)) {
4945 flen = b_data(&h2c->dbuf);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004946 if (!flen)
Willy Tarreau454b57b2018-02-26 15:50:05 +01004947 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004948 }
4949
Christopher Faulet9b79a102019-07-15 11:22:56 +02004950 block = htx_free_data_space(htx);
4951 if (!block) {
4952 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004953 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 +02004954 goto fail;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004955 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004956 if (flen > block)
4957 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004958
Christopher Faulet9b79a102019-07-15 11:22:56 +02004959 /* here, flen is the max we can copy into the output buffer */
4960 block = b_contig_data(&h2c->dbuf, 0);
4961 if (flen > block)
4962 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004963
Christopher Faulet9b79a102019-07-15 11:22:56 +02004964 sent = htx_add_data(htx, ist2(b_head(&h2c->dbuf), flen));
Willy Tarreau022e5e52020-09-10 09:33:15 +02004965 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 +02004966
Christopher Faulet9b79a102019-07-15 11:22:56 +02004967 b_del(&h2c->dbuf, sent);
4968 h2c->dfl -= sent;
4969 h2c->rcvd_c += sent;
4970 h2c->rcvd_s += sent; // warning, this can also affect the closed streams!
Willy Tarreau454f9052017-10-26 19:40:35 +02004971
Christopher Faulet9b79a102019-07-15 11:22:56 +02004972 if (h2s->flags & H2_SF_DATA_CLEN) {
4973 h2s->body_len -= sent;
4974 htx->extra = h2s->body_len;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004975 }
4976
Christopher Faulet9b79a102019-07-15 11:22:56 +02004977 if (sent < flen) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01004978 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004979 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 +01004980 goto fail;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004981 }
4982
Christopher Faulet9b79a102019-07-15 11:22:56 +02004983 goto try_again;
4984
Willy Tarreau4a28da12018-01-04 14:41:00 +01004985 end_transfer:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004986 /* here we're done with the frame, all the payload (except padding) was
4987 * transferred.
4988 */
Willy Tarreaueba10f22018-04-25 20:44:22 +02004989
Christopher Faulet5be651d2021-01-22 15:28:03 +01004990 if (!(h2s->flags & H2_SF_BODY_TUNNEL) && (h2c->dff & H2_F_DATA_END_STREAM)) {
4991 /* no more data are expected for this message. This add the EOM
4992 * flag but only on the response path or if no tunnel attempt
4993 * was aborted. Otherwise (request path + tunnel abrted), the
4994 * EOM was already reported.
4995 */
Christopher Faulet33724322021-02-10 09:04:59 +01004996 if ((h2c->flags & H2_CF_IS_BACK) || !(h2s->flags & H2_SF_TUNNEL_ABRT)) {
4997 /* If we receive an empty DATA frame with ES flag while the HTX
4998 * message is empty, we must be sure to push a block to be sure
4999 * the HTX EOM flag will be handled on the other side. It is a
5000 * workaround because for now it is not possible to push empty
5001 * HTX DATA block. And without this block, there is no way to
5002 * "commit" the end of the message.
5003 */
5004 if (htx_is_empty(htx)) {
5005 if (!htx_add_endof(htx, HTX_BLK_EOT))
5006 goto fail;
5007 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005008 htx->flags |= HTX_FL_EOM;
Christopher Faulet33724322021-02-10 09:04:59 +01005009 }
Willy Tarreaueba10f22018-04-25 20:44:22 +02005010 }
5011
Willy Tarreaud1023bb2018-03-22 16:53:12 +01005012 h2c->rcvd_c += h2c->dpl;
5013 h2c->rcvd_s += h2c->dpl;
5014 h2c->dpl = 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02005015 h2c->st0 = H2_CS_FRAME_A; // send the corresponding window update
Christopher Faulet9b79a102019-07-15 11:22:56 +02005016 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02005017 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005018 return 1;
Willy Tarreau454b57b2018-02-26 15:50:05 +01005019 fail:
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005020 if (htx)
5021 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02005022 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454b57b2018-02-26 15:50:05 +01005023 return 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02005024}
5025
Willy Tarreau115e83b2018-12-01 19:17:53 +01005026/* Try to send a HEADERS frame matching HTX response present in HTX message
5027 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
5028 * must check the stream's status to detect any error which might have happened
5029 * subsequently to a successful send. The htx blocks are automatically removed
5030 * from the message. The htx message is assumed to be valid since produced from
5031 * the internal code, hence it contains a start line, an optional series of
5032 * header blocks and an end of header, otherwise an invalid frame could be
5033 * emitted and the resulting htx message could be left in an inconsistent state.
5034 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005035static size_t h2s_frt_make_resp_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005036{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005037 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau115e83b2018-12-01 19:17:53 +01005038 struct h2c *h2c = h2s->h2c;
5039 struct htx_blk *blk;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005040 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005041 struct buffer *mbuf;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005042 struct htx_sl *sl;
5043 enum htx_blk_type type;
5044 int es_now = 0;
5045 int ret = 0;
5046 int hdr;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005047
Willy Tarreau7838a792019-08-12 18:42:03 +02005048 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5049
Willy Tarreau115e83b2018-12-01 19:17:53 +01005050 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005051 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005052 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005053 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005054 return 0;
5055 }
5056
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005057 /* get the start line (we do have one) and the rest of the headers,
5058 * that we dump starting at header 0 */
5059 sl = NULL;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005060 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005061 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau115e83b2018-12-01 19:17:53 +01005062 type = htx_get_blk_type(blk);
5063
5064 if (type == HTX_BLK_UNUSED)
5065 continue;
5066
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005067 if (type == HTX_BLK_EOH)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005068 break;
5069
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005070 if (type == HTX_BLK_HDR) {
Christopher Faulet56498132021-01-29 11:39:43 +01005071 BUG_ON(!sl); /* The start-line mut be defined before any headers */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005072 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5073 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5074 goto fail;
5075 }
5076
5077 list[hdr].n = htx_get_blk_name(htx, blk);
5078 list[hdr].v = htx_get_blk_value(htx, blk);
5079 hdr++;
5080 }
5081 else if (type == HTX_BLK_RES_SL) {
Christopher Faulet56498132021-01-29 11:39:43 +01005082 BUG_ON(sl); /* Only one start-line expected */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005083 sl = htx_get_blk_ptr(htx, blk);
5084 h2s->status = sl->info.res.status;
Christopher Faulet7d247f02020-12-02 14:26:36 +01005085 if (h2s->status == 204 || h2s->status == 304)
5086 h2s->flags |= H2_SF_BODYLESS_RESP;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005087 if (h2s->status < 100 || h2s->status > 999) {
5088 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5089 goto fail;
5090 }
5091 else if (h2s->status == 101) {
Amaury Denoyelleefe22762020-12-11 17:53:08 +01005092 if (unlikely(h2s->flags & H2_SF_EXT_CONNECT_RCVD)) {
5093 /* If an Extended CONNECT has been received, we need to convert 101 to 200 */
5094 h2s->status = 200;
5095 h2s->flags &= ~H2_SF_EXT_CONNECT_RCVD;
5096 }
5097 else {
5098 /* Otherwise, 101 responses are not supported in H2, so return a error (RFC7540#8.1.1) */
5099 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5100 goto fail;
5101 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005102 }
5103 else if ((h2s->flags & H2_SF_BODY_TUNNEL) && h2s->status >= 300) {
5104 /* Abort the tunnel attempt */
5105 h2s->flags &= ~H2_SF_BODY_TUNNEL;
5106 h2s->flags |= H2_SF_TUNNEL_ABRT;
5107 }
5108 }
5109 else {
5110 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 +01005111 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005112 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005113 }
5114
Christopher Faulet56498132021-01-29 11:39:43 +01005115 /* The start-line me be defined */
5116 BUG_ON(!sl);
5117
Willy Tarreau115e83b2018-12-01 19:17:53 +01005118 /* marker for end of headers */
5119 list[hdr].n = ist("");
5120
Willy Tarreau9c218e72019-05-26 10:08:28 +02005121 mbuf = br_tail(h2c->mbuf);
5122 retry:
5123 if (!h2_get_buf(h2c, mbuf)) {
5124 h2c->flags |= H2_CF_MUX_MALLOC;
5125 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005126 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 +02005127 return 0;
5128 }
5129
Willy Tarreau115e83b2018-12-01 19:17:53 +01005130 chunk_reset(&outbuf);
5131
5132 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005133 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5134 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005135 break;
5136 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005137 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau115e83b2018-12-01 19:17:53 +01005138 }
5139
5140 if (outbuf.size < 9)
5141 goto full;
5142
5143 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5144 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5145 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5146 outbuf.data = 9;
5147
5148 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01005149 if (!hpack_encode_int_status(&outbuf, h2s->status)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005150 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005151 goto realign_again;
5152 goto full;
5153 }
5154
5155 /* encode all headers, stop at empty name */
5156 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
5157 /* these ones do not exist in H2 and must be dropped. */
5158 if (isteq(list[hdr].n, ist("connection")) ||
5159 isteq(list[hdr].n, ist("proxy-connection")) ||
5160 isteq(list[hdr].n, ist("keep-alive")) ||
5161 isteq(list[hdr].n, ist("upgrade")) ||
5162 isteq(list[hdr].n, ist("transfer-encoding")))
5163 continue;
5164
Christopher Faulet86d144c2019-08-14 16:32:25 +02005165 /* Skip all pseudo-headers */
5166 if (*(list[hdr].n.ptr) == ':')
5167 continue;
5168
Willy Tarreau115e83b2018-12-01 19:17:53 +01005169 if (isteq(list[hdr].n, ist("")))
5170 break; // end
5171
5172 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
5173 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005174 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005175 goto realign_again;
5176 goto full;
5177 }
5178 }
5179
Willy Tarreaucb985a42019-10-07 16:56:34 +02005180 /* update the frame's size */
5181 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5182
5183 if (outbuf.data > h2c->mfs + 9) {
5184 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5185 /* output full */
5186 if (b_space_wraps(mbuf))
5187 goto realign_again;
5188 goto full;
5189 }
5190 }
5191
Willy Tarreau3a537072021-06-17 08:40:04 +02005192 TRACE_USER("sent H2 response ", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
5193
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005194 /* remove all header blocks including the EOH and compute the
5195 * corresponding size.
Willy Tarreau115e83b2018-12-01 19:17:53 +01005196 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005197 ret = 0;
5198 blk = htx_get_head_blk(htx);
5199 while (blk) {
5200 type = htx_get_blk_type(blk);
5201 ret += htx_get_blksz(blk);
5202 blk = htx_remove_blk(htx, blk);
5203 /* The removed block is the EOH */
5204 if (type == HTX_BLK_EOH)
5205 break;
Christopher Faulet5be651d2021-01-22 15:28:03 +01005206 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005207
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005208 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW) {
5209 /* Response already closed: add END_STREAM */
5210 es_now = 1;
5211 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005212 else if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx) && h2s->status >= 200) {
5213 /* EOM+empty: we may need to add END_STREAM except for 1xx
Christopher Faulet991febd2020-12-02 15:17:31 +01005214 * responses and tunneled response.
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005215 */
Christopher Faulet991febd2020-12-02 15:17:31 +01005216 if (!(h2s->flags & H2_SF_BODY_TUNNEL) || h2s->status >= 300)
5217 es_now = 1;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005218 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005219
Willy Tarreau115e83b2018-12-01 19:17:53 +01005220 if (es_now)
5221 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5222
5223 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005224 b_add(mbuf, outbuf.data);
Christopher Faulet0b465482019-02-19 15:14:23 +01005225
5226 /* indicates the HEADERS frame was sent, except for 1xx responses. For
5227 * 1xx responses, another HEADERS frame is expected.
5228 */
Christopher Faulet89899422020-12-07 18:24:43 +01005229 if (h2s->status >= 200)
Christopher Faulet0b465482019-02-19 15:14:23 +01005230 h2s->flags |= H2_SF_HEADERS_SENT;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005231
Willy Tarreau115e83b2018-12-01 19:17:53 +01005232 if (es_now) {
5233 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005234 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 +01005235 if (h2s->st == H2_SS_OPEN)
5236 h2s->st = H2_SS_HLOC;
5237 else
5238 h2s_close(h2s);
5239 }
5240
5241 /* OK we could properly deliver the response */
Willy Tarreau115e83b2018-12-01 19:17:53 +01005242 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005243 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005244 return ret;
5245 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005246 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5247 goto retry;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005248 h2c->flags |= H2_CF_MUX_MFULL;
5249 h2s->flags |= H2_SF_BLK_MROOM;
5250 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005251 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 +01005252 goto end;
5253 fail:
5254 /* unparsable HTX messages, too large ones to be produced in the local
5255 * list etc go here (unrecoverable errors).
5256 */
5257 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5258 ret = 0;
5259 goto end;
5260}
5261
Willy Tarreau80739692018-10-05 11:35:57 +02005262/* Try to send a HEADERS frame matching HTX request present in HTX message
5263 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
5264 * must check the stream's status to detect any error which might have happened
5265 * subsequently to a successful send. The htx blocks are automatically removed
5266 * from the message. The htx message is assumed to be valid since produced from
5267 * the internal code, hence it contains a start line, an optional series of
5268 * header blocks and an end of header, otherwise an invalid frame could be
5269 * emitted and the resulting htx message could be left in an inconsistent state.
5270 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005271static size_t h2s_bck_make_req_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau80739692018-10-05 11:35:57 +02005272{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005273 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau80739692018-10-05 11:35:57 +02005274 struct h2c *h2c = h2s->h2c;
5275 struct htx_blk *blk;
Willy Tarreau80739692018-10-05 11:35:57 +02005276 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005277 struct buffer *mbuf;
Willy Tarreau80739692018-10-05 11:35:57 +02005278 struct htx_sl *sl;
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005279 struct ist meth, uri, auth, host = IST_NULL;
Willy Tarreau80739692018-10-05 11:35:57 +02005280 enum htx_blk_type type;
5281 int es_now = 0;
5282 int ret = 0;
5283 int hdr;
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005284 int extended_connect = 0;
Willy Tarreau80739692018-10-05 11:35:57 +02005285
Willy Tarreau7838a792019-08-12 18:42:03 +02005286 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5287
Willy Tarreau80739692018-10-05 11:35:57 +02005288 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005289 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02005290 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005291 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02005292 return 0;
5293 }
5294
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005295 /* get the start line (we do have one) and the rest of the headers,
5296 * that we dump starting at header 0 */
5297 sl = NULL;
Willy Tarreau80739692018-10-05 11:35:57 +02005298 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005299 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005300 type = htx_get_blk_type(blk);
5301
5302 if (type == HTX_BLK_UNUSED)
5303 continue;
5304
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005305 if (type == HTX_BLK_EOH)
Willy Tarreau80739692018-10-05 11:35:57 +02005306 break;
5307
Christopher Fauletc29b4bf2021-01-29 11:49:16 +01005308 if (type == HTX_BLK_HDR) {
Christopher Faulet56498132021-01-29 11:39:43 +01005309 BUG_ON(!sl); /* The start-line mut be defined before any headers */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005310 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5311 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5312 goto fail;
5313 }
Willy Tarreau80739692018-10-05 11:35:57 +02005314
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005315 list[hdr].n = htx_get_blk_name(htx, blk);
5316 list[hdr].v = htx_get_blk_value(htx, blk);
Christopher Faulet67d58092019-10-02 10:51:38 +02005317
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005318 /* Skip header if same name is used to add the server name */
5319 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name &&
5320 isteq(list[hdr].n, ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len)))
5321 continue;
Christopher Faulet67d58092019-10-02 10:51:38 +02005322
Ilya Shipitsinacf84592021-02-06 22:29:08 +05005323 /* Convert connection: upgrade to Extended connect from rfc 8441 */
Christopher Faulet52a5ec22021-09-09 09:52:51 +02005324 if ((sl->flags & HTX_SL_F_CONN_UPG) && isteqi(list[hdr].n, ist("connection"))) {
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005325 /* rfc 7230 #6.1 Connection = list of tokens */
5326 struct ist connection_ist = list[hdr].v;
5327 do {
5328 if (isteqi(iststop(connection_ist, ','),
5329 ist("upgrade"))) {
Amaury Denoyelle0df04362021-10-18 09:43:29 +02005330 if (!(h2c->flags & H2_CF_RCVD_RFC8441)) {
5331 TRACE_STATE("reject upgrade because of no RFC8441 support", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5332 goto fail;
5333 }
5334
Amaury Denoyellee0c258c2021-10-18 10:05:16 +02005335 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 +01005336 h2s->flags |= (H2_SF_BODY_TUNNEL|H2_SF_EXT_CONNECT_SENT);
5337 sl->info.req.meth = HTTP_METH_CONNECT;
5338 meth = ist("CONNECT");
5339
5340 extended_connect = 1;
5341 break;
5342 }
5343
5344 connection_ist = istadv(istfind(connection_ist, ','), 1);
5345 } while (istlen(connection_ist));
5346 }
5347
Christopher Faulet52a5ec22021-09-09 09:52:51 +02005348 if ((sl->flags & HTX_SL_F_CONN_UPG) && isteq(list[hdr].n, ist("upgrade"))) {
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005349 /* rfc 7230 #6.7 Upgrade = list of protocols
5350 * rfc 8441 #4 Extended connect = :protocol is single-valued
5351 *
5352 * only first HTTP/1 protocol is preserved
5353 */
5354 const struct ist protocol = iststop(list[hdr].v, ',');
5355 /* upgrade_protocol field is 16 bytes long in h2s */
5356 istpad(h2s->upgrade_protocol, isttrim(protocol, 15));
5357 }
5358
5359 if (isteq(list[hdr].n, ist("host")))
5360 host = list[hdr].v;
5361
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005362 hdr++;
5363 }
Christopher Fauletc29b4bf2021-01-29 11:49:16 +01005364 else if (type == HTX_BLK_REQ_SL) {
5365 BUG_ON(sl); /* Only one start-line expected */
5366 sl = htx_get_blk_ptr(htx, blk);
5367 meth = htx_sl_req_meth(sl);
5368 uri = htx_sl_req_uri(sl);
5369 if (sl->info.req.meth == HTTP_METH_HEAD)
5370 h2s->flags |= H2_SF_BODYLESS_RESP;
5371 if (unlikely(uri.len == 0)) {
5372 TRACE_ERROR("no URI in HTX request", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5373 goto fail;
5374 }
5375 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005376 else {
5377 TRACE_ERROR("will not encode unexpected htx block", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5378 goto fail;
5379 }
Willy Tarreau80739692018-10-05 11:35:57 +02005380 }
5381
Christopher Faulet56498132021-01-29 11:39:43 +01005382 /* The start-line me be defined */
5383 BUG_ON(!sl);
5384
Christopher Faulet72ba6cd2019-09-24 16:20:05 +02005385 /* Now add the server name to a header (if requested) */
5386 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name) {
5387 struct server *srv = objt_server(h2c->conn->target);
5388
5389 if (srv) {
5390 list[hdr].n = ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len);
5391 list[hdr].v = ist(srv->id);
5392 hdr++;
5393 }
5394 }
5395
Willy Tarreau80739692018-10-05 11:35:57 +02005396 /* marker for end of headers */
5397 list[hdr].n = ist("");
5398
Willy Tarreau9c218e72019-05-26 10:08:28 +02005399 mbuf = br_tail(h2c->mbuf);
5400 retry:
5401 if (!h2_get_buf(h2c, mbuf)) {
5402 h2c->flags |= H2_CF_MUX_MALLOC;
5403 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005404 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 +02005405 return 0;
5406 }
5407
Willy Tarreau80739692018-10-05 11:35:57 +02005408 chunk_reset(&outbuf);
5409
5410 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005411 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5412 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005413 break;
5414 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005415 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau80739692018-10-05 11:35:57 +02005416 }
5417
5418 if (outbuf.size < 9)
5419 goto full;
5420
5421 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5422 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5423 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5424 outbuf.data = 9;
5425
5426 /* encode the method, which necessarily is the first one */
Willy Tarreaubdabc3a2018-12-10 18:25:11 +01005427 if (!hpack_encode_method(&outbuf, sl->info.req.meth, meth)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005428 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005429 goto realign_again;
5430 goto full;
5431 }
5432
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005433 auth = ist(NULL);
5434
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005435 /* RFC7540 #8.3: the CONNECT method must have :
5436 * - :authority set to the URI part (host:port)
5437 * - :method set to CONNECT
5438 * - :scheme and :path omitted
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005439 *
5440 * Note that this is not applicable in case of the Extended CONNECT
5441 * protocol from rfc 8441.
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005442 */
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005443 if (unlikely(sl->info.req.meth == HTTP_METH_CONNECT) && !extended_connect) {
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005444 auth = uri;
5445
5446 if (!hpack_encode_header(&outbuf, ist(":authority"), auth)) {
5447 /* output full */
5448 if (b_space_wraps(mbuf))
5449 goto realign_again;
5450 goto full;
5451 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005452 h2s->flags |= H2_SF_BODY_TUNNEL;
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005453 } else {
5454 /* other methods need a :scheme. If an authority is known from
5455 * the request line, it must be sent, otherwise only host is
5456 * sent. Host is never sent as the authority.
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005457 *
5458 * This code is also applicable for Extended CONNECT protocol
5459 * from rfc 8441.
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005460 */
5461 struct ist scheme = { };
Christopher Faulet3b44c542019-06-14 10:46:51 +02005462
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005463 if (uri.ptr[0] != '/' && uri.ptr[0] != '*') {
5464 /* the URI seems to start with a scheme */
5465 int len = 1;
5466
5467 while (len < uri.len && uri.ptr[len] != ':')
5468 len++;
5469
5470 if (len + 2 < uri.len && uri.ptr[len + 1] == '/' && uri.ptr[len + 2] == '/') {
5471 /* make the uri start at the authority now */
Tim Duesterhus9f75ed12021-03-02 18:57:26 +01005472 scheme = ist2(uri.ptr, len);
Tim Duesterhus154374c2021-03-02 18:57:27 +01005473 uri = istadv(uri, len + 3);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005474
5475 /* find the auth part of the URI */
Tim Duesterhus92c696e2021-02-28 16:11:36 +01005476 auth = ist2(uri.ptr, 0);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005477 while (auth.len < uri.len && auth.ptr[auth.len] != '/')
5478 auth.len++;
5479
Tim Duesterhus154374c2021-03-02 18:57:27 +01005480 uri = istadv(uri, auth.len);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005481 }
5482 }
5483
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005484 /* For Extended CONNECT, the :authority must be present.
5485 * Use host value for it.
5486 */
5487 if (unlikely(extended_connect) && isttest(host))
5488 auth = host;
5489
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005490 if (!scheme.len) {
5491 /* no explicit scheme, we're using an origin-form URI,
5492 * probably from an H1 request transcoded to H2 via an
5493 * external layer, then received as H2 without authority.
5494 * So we have to look up the scheme from the HTX flags.
5495 * In such a case only http and https are possible, and
5496 * https is the default (sent by browsers).
5497 */
5498 if ((sl->flags & (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP)) == (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP))
5499 scheme = ist("http");
5500 else
5501 scheme = ist("https");
5502 }
Christopher Faulet3b44c542019-06-14 10:46:51 +02005503
5504 if (!hpack_encode_scheme(&outbuf, scheme)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005505 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005506 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005507 goto realign_again;
5508 goto full;
5509 }
Willy Tarreau80739692018-10-05 11:35:57 +02005510
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005511 if (auth.len && !hpack_encode_header(&outbuf, ist(":authority"), auth)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005512 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005513 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005514 goto realign_again;
5515 goto full;
5516 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005517
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005518 /* encode the path. RFC7540#8.1.2.3: if path is empty it must
5519 * be sent as '/' or '*'.
5520 */
5521 if (unlikely(!uri.len)) {
5522 if (sl->info.req.meth == HTTP_METH_OPTIONS)
5523 uri = ist("*");
5524 else
5525 uri = ist("/");
Willy Tarreau053c1572019-02-01 16:13:59 +01005526 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005527
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005528 if (!hpack_encode_path(&outbuf, uri)) {
5529 /* output full */
5530 if (b_space_wraps(mbuf))
5531 goto realign_again;
5532 goto full;
5533 }
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005534
5535 /* encode the pseudo-header protocol from rfc8441 if using
5536 * Extended CONNECT method.
5537 */
5538 if (unlikely(extended_connect)) {
5539 const struct ist protocol = ist(h2s->upgrade_protocol);
5540 if (isttest(protocol)) {
5541 if (!hpack_encode_header(&outbuf,
5542 ist(":protocol"),
5543 protocol)) {
5544 /* output full */
5545 if (b_space_wraps(mbuf))
5546 goto realign_again;
5547 goto full;
5548 }
5549 }
5550 }
Willy Tarreau80739692018-10-05 11:35:57 +02005551 }
5552
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005553 /* encode all headers, stop at empty name. Host is only sent if we
5554 * do not provide an authority.
5555 */
Willy Tarreau80739692018-10-05 11:35:57 +02005556 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005557 struct ist n = list[hdr].n;
5558 struct ist v = list[hdr].v;
5559
Willy Tarreau80739692018-10-05 11:35:57 +02005560 /* these ones do not exist in H2 and must be dropped. */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005561 if (isteq(n, ist("connection")) ||
5562 (auth.len && isteq(n, ist("host"))) ||
5563 isteq(n, ist("proxy-connection")) ||
5564 isteq(n, ist("keep-alive")) ||
5565 isteq(n, ist("upgrade")) ||
5566 isteq(n, ist("transfer-encoding")))
Willy Tarreau80739692018-10-05 11:35:57 +02005567 continue;
5568
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005569 if (isteq(n, ist("te"))) {
5570 /* "te" may only be sent with "trailers" if this value
5571 * is present, otherwise it must be deleted.
5572 */
5573 v = istist(v, ist("trailers"));
Tim Duesterhus7b5777d2021-03-02 18:57:28 +01005574 if (!isttest(v) || (v.len > 8 && v.ptr[8] != ','))
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005575 continue;
5576 v = ist("trailers");
5577 }
5578
Christopher Faulet86d144c2019-08-14 16:32:25 +02005579 /* Skip all pseudo-headers */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005580 if (*(n.ptr) == ':')
Christopher Faulet86d144c2019-08-14 16:32:25 +02005581 continue;
5582
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005583 if (isteq(n, ist("")))
Willy Tarreau80739692018-10-05 11:35:57 +02005584 break; // end
5585
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005586 if (!hpack_encode_header(&outbuf, n, v)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005587 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005588 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005589 goto realign_again;
5590 goto full;
5591 }
5592 }
5593
Willy Tarreaucb985a42019-10-07 16:56:34 +02005594 /* update the frame's size */
5595 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5596
5597 if (outbuf.data > h2c->mfs + 9) {
5598 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5599 /* output full */
5600 if (b_space_wraps(mbuf))
5601 goto realign_again;
5602 goto full;
5603 }
5604 }
5605
Willy Tarreau3a537072021-06-17 08:40:04 +02005606 TRACE_USER("sent H2 request ", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
5607
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005608 /* remove all header blocks including the EOH and compute the
5609 * corresponding size.
Willy Tarreau80739692018-10-05 11:35:57 +02005610 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005611 ret = 0;
5612 blk = htx_get_head_blk(htx);
5613 while (blk) {
5614 type = htx_get_blk_type(blk);
5615 ret += htx_get_blksz(blk);
5616 blk = htx_remove_blk(htx, blk);
5617 /* The removed block is the EOH */
5618 if (type == HTX_BLK_EOH)
5619 break;
Christopher Fauletd0db4232021-01-22 11:46:30 +01005620 }
Willy Tarreau80739692018-10-05 11:35:57 +02005621
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005622 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW) {
5623 /* Request already closed: add END_STREAM */
Willy Tarreau80739692018-10-05 11:35:57 +02005624 es_now = 1;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005625 }
5626 if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx)) {
5627 /* EOM+empty: we may need to add END_STREAM (except for CONNECT
5628 * request)
5629 */
5630 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5631 es_now = 1;
5632 }
Willy Tarreau80739692018-10-05 11:35:57 +02005633
Willy Tarreau80739692018-10-05 11:35:57 +02005634 if (es_now)
5635 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5636
5637 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005638 b_add(mbuf, outbuf.data);
Willy Tarreau80739692018-10-05 11:35:57 +02005639 h2s->flags |= H2_SF_HEADERS_SENT;
5640 h2s->st = H2_SS_OPEN;
5641
Willy Tarreau80739692018-10-05 11:35:57 +02005642 if (es_now) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005643 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 +02005644 // trim any possibly pending data (eg: inconsistent content-length)
5645 h2s->flags |= H2_SF_ES_SENT;
5646 h2s->st = H2_SS_HLOC;
5647 }
5648
Willy Tarreau80739692018-10-05 11:35:57 +02005649 end:
5650 return ret;
5651 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005652 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5653 goto retry;
Willy Tarreau80739692018-10-05 11:35:57 +02005654 h2c->flags |= H2_CF_MUX_MFULL;
5655 h2s->flags |= H2_SF_BLK_MROOM;
5656 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005657 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 +02005658 goto end;
5659 fail:
5660 /* unparsable HTX messages, too large ones to be produced in the local
5661 * list etc go here (unrecoverable errors).
5662 */
5663 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5664 ret = 0;
5665 goto end;
5666}
5667
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005668/* Try to send a DATA frame matching HTTP response present in HTX structure
Willy Tarreau98de12a2018-12-12 07:03:00 +01005669 * present in <buf>, for stream <h2s>. Returns the number of bytes sent. The
5670 * caller must check the stream's status to detect any error which might have
5671 * happened subsequently to a successful send. Returns the number of data bytes
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005672 * consumed, or zero if nothing done.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005673 */
Christopher Faulet142854b2020-12-02 15:12:40 +01005674static size_t h2s_make_data(struct h2s *h2s, struct buffer *buf, size_t count)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005675{
5676 struct h2c *h2c = h2s->h2c;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005677 struct htx *htx;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005678 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005679 struct buffer *mbuf;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005680 size_t total = 0;
5681 int es_now = 0;
5682 int bsize; /* htx block size */
5683 int fsize; /* h2 frame size */
5684 struct htx_blk *blk;
5685 enum htx_blk_type type;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005686 int trunc_out; /* non-zero if truncated on out buf */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005687
Willy Tarreau7838a792019-08-12 18:42:03 +02005688 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5689
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005690 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005691 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005692 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005693 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005694 goto end;
5695 }
5696
Willy Tarreau98de12a2018-12-12 07:03:00 +01005697 htx = htx_from_buf(buf);
5698
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005699 /* We only come here with HTX_BLK_DATA blocks */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005700
5701 new_frame:
Willy Tarreauee573762018-12-04 15:25:57 +01005702 if (!count || htx_is_empty(htx))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005703 goto end;
5704
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005705 if ((h2c->flags & H2_CF_IS_BACK) &&
Christopher Fauletf95f8762021-01-22 11:59:07 +01005706 (h2s->flags & (H2_SF_HEADERS_RCVD|H2_SF_BODY_TUNNEL)) == H2_SF_BODY_TUNNEL) {
5707 /* The response HEADERS frame not received yet. Thus the tunnel
5708 * is not fully established yet. In this situation, we block
5709 * data sending.
5710 */
5711 h2s->flags |= H2_SF_BLK_MBUSY;
5712 TRACE_STATE("Request DATA frame blocked waiting for tunnel establishment", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5713 goto end;
5714 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01005715 else if ((h2c->flags & H2_CF_IS_BACK) && (h2s->flags & H2_SF_TUNNEL_ABRT)) {
5716 /* a tunnel attempt was aborted but the is pending raw data to xfer to the server.
5717 * Thus the stream is closed with the CANCEL error. The error will be reported to
5718 * the upper layer as aserver abort. But at this stage there is nothing more we can
5719 * do. We just wait for the end of the response to be sure to not truncate it.
5720 */
5721 if (!(h2s->flags & H2_SF_ES_RCVD)) {
5722 TRACE_STATE("Request DATA frame blocked waiting end of aborted tunnel", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5723 h2s->flags |= H2_SF_BLK_MBUSY;
5724 }
5725 else {
5726 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
5727 h2s_error(h2s, H2_ERR_CANCEL);
5728 }
5729 goto end;
5730 }
Willy Tarreau98de12a2018-12-12 07:03:00 +01005731
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005732 blk = htx_get_head_blk(htx);
5733 type = htx_get_blk_type(blk);
5734 bsize = htx_get_blksz(blk);
5735 fsize = bsize;
5736 trunc_out = 0;
5737 if (type != HTX_BLK_DATA)
5738 goto end;
5739
Willy Tarreau9c218e72019-05-26 10:08:28 +02005740 mbuf = br_tail(h2c->mbuf);
5741 retry:
5742 if (!h2_get_buf(h2c, mbuf)) {
5743 h2c->flags |= H2_CF_MUX_MALLOC;
5744 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005745 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 +02005746 goto end;
5747 }
5748
Willy Tarreau98de12a2018-12-12 07:03:00 +01005749 /* Perform some optimizations to reduce the number of buffer copies.
5750 * First, if the mux's buffer is empty and the htx area contains
5751 * exactly one data block of the same size as the requested count, and
5752 * this count fits within the frame size, the stream's window size, and
5753 * the connection's window size, then it's possible to simply swap the
5754 * caller's buffer with the mux's output buffer and adjust offsets and
5755 * length to match the entire DATA HTX block in the middle. In this
5756 * case we perform a true zero-copy operation from end-to-end. This is
5757 * the situation that happens all the time with large files. Second, if
5758 * this is not possible, but the mux's output buffer is empty, we still
5759 * have an opportunity to avoid the copy to the intermediary buffer, by
5760 * making the intermediary buffer's area point to the output buffer's
5761 * area. In this case we want to skip the HTX header to make sure that
5762 * copies remain aligned and that this operation remains possible all
5763 * the time. This goes for headers, data blocks and any data extracted
5764 * from the HTX blocks.
5765 */
5766 if (unlikely(fsize == count &&
Christopher Faulet192c6a22019-06-11 16:32:24 +02005767 htx_nbblks(htx) == 1 && type == HTX_BLK_DATA &&
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005768 fsize <= h2s_mws(h2s) && fsize <= h2c->mws && fsize <= h2c->mfs)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005769 void *old_area = mbuf->area;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005770
Willy Tarreaubcc45952019-05-26 10:05:50 +02005771 if (b_data(mbuf)) {
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005772 /* Too bad there are data left there. We're willing to memcpy/memmove
5773 * up to 1/4 of the buffer, which means that it's OK to copy a large
5774 * frame into a buffer containing few data if it needs to be realigned,
5775 * and that it's also OK to copy few data without realigning. Otherwise
5776 * we'll pretend the mbuf is full and wait for it to become empty.
Willy Tarreau98de12a2018-12-12 07:03:00 +01005777 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005778 if (fsize + 9 <= b_room(mbuf) &&
5779 (b_data(mbuf) <= b_size(mbuf) / 4 ||
Willy Tarreau7838a792019-08-12 18:42:03 +02005780 (fsize <= b_size(mbuf) / 4 && fsize + 9 <= b_contig_space(mbuf)))) {
5781 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 +01005782 goto copy;
Willy Tarreau7838a792019-08-12 18:42:03 +02005783 }
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005784
Willy Tarreau9c218e72019-05-26 10:08:28 +02005785 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5786 goto retry;
5787
Willy Tarreau98de12a2018-12-12 07:03:00 +01005788 h2c->flags |= H2_CF_MUX_MFULL;
5789 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005790 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 +01005791 goto end;
5792 }
5793
Christopher Faulet925abdf2021-04-27 22:51:07 +02005794 if (htx->flags & HTX_FL_EOM) {
5795 /* EOM+empty: we may need to add END_STREAM (except for tunneled
5796 * message)
5797 */
5798 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5799 es_now = 1;
5800 }
Willy Tarreau98de12a2018-12-12 07:03:00 +01005801 /* map an H2 frame to the HTX block so that we can put the
5802 * frame header there.
5803 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005804 *mbuf = b_make(buf->area, buf->size, sizeof(struct htx) + blk->addr - 9, fsize + 9);
5805 outbuf.area = b_head(mbuf);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005806
5807 /* prepend an H2 DATA frame header just before the DATA block */
5808 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5809 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
Christopher Faulet925abdf2021-04-27 22:51:07 +02005810 if (es_now)
5811 outbuf.area[4] |= H2_F_DATA_END_STREAM;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005812 h2_set_frame_size(outbuf.area, fsize);
5813
5814 /* update windows */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005815 h2s->sws -= fsize;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005816 h2c->mws -= fsize;
5817
5818 /* and exchange with our old area */
5819 buf->area = old_area;
5820 buf->data = buf->head = 0;
5821 total += fsize;
Christopher Faulet925abdf2021-04-27 22:51:07 +02005822 fsize = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005823
5824 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 +02005825 goto out;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005826 }
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005827
Willy Tarreau98de12a2018-12-12 07:03:00 +01005828 copy:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005829 /* for DATA and EOM we'll have to emit a frame, even if empty */
5830
5831 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005832 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5833 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005834 break;
5835 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005836 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005837 }
5838
5839 if (outbuf.size < 9) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02005840 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5841 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005842 h2c->flags |= H2_CF_MUX_MFULL;
5843 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005844 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005845 goto end;
5846 }
5847
5848 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
5849 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5850 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5851 outbuf.data = 9;
5852
5853 /* we have in <fsize> the exact number of bytes we need to copy from
5854 * the HTX buffer. We need to check this against the connection's and
5855 * the stream's send windows, and to ensure that this fits in the max
5856 * frame size and in the buffer's available space minus 9 bytes (for
5857 * the frame header). The connection's flow control is applied last so
5858 * that we can use a separate list of streams which are immediately
5859 * unblocked on window opening. Note: we don't implement padding.
5860 */
5861
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005862 if (!fsize)
5863 goto send_empty;
5864
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005865 if (h2s_mws(h2s) <= 0) {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005866 h2s->flags |= H2_SF_BLK_SFCTL;
Willy Tarreau2b718102021-04-21 07:32:39 +02005867 if (LIST_INLIST(&h2s->list))
Olivier Houchardbfe2a832019-05-10 14:02:21 +02005868 LIST_DEL_INIT(&h2s->list);
Willy Tarreau2b718102021-04-21 07:32:39 +02005869 LIST_APPEND(&h2c->blocked_list, &h2s->list);
Willy Tarreau7838a792019-08-12 18:42:03 +02005870 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 +01005871 goto end;
5872 }
5873
Willy Tarreauee573762018-12-04 15:25:57 +01005874 if (fsize > count)
5875 fsize = count;
5876
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005877 if (fsize > h2s_mws(h2s))
5878 fsize = h2s_mws(h2s); // >0
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005879
5880 if (h2c->mfs && fsize > h2c->mfs)
5881 fsize = h2c->mfs; // >0
5882
5883 if (fsize + 9 > outbuf.size) {
Willy Tarreau455d5682019-05-24 19:42:18 +02005884 /* It doesn't fit at once. If it at least fits once split and
5885 * the amount of data to move is low, let's defragment the
5886 * buffer now.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005887 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005888 if (b_space_wraps(mbuf) &&
5889 (fsize + 9 <= b_room(mbuf)) &&
5890 b_data(mbuf) <= MAX_DATA_REALIGN)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005891 goto realign_again;
5892 fsize = outbuf.size - 9;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005893 trunc_out = 1;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005894
5895 if (fsize <= 0) {
5896 /* no need to send an empty frame here */
Willy Tarreau9c218e72019-05-26 10:08:28 +02005897 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5898 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005899 h2c->flags |= H2_CF_MUX_MFULL;
5900 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005901 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005902 goto end;
5903 }
5904 }
5905
5906 if (h2c->mws <= 0) {
5907 h2s->flags |= H2_SF_BLK_MFCTL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005908 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 +01005909 goto end;
5910 }
5911
5912 if (fsize > h2c->mws)
5913 fsize = h2c->mws;
5914
5915 /* now let's copy this this into the output buffer */
5916 memcpy(outbuf.area + 9, htx_get_blk_ptr(htx, blk), fsize);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005917 h2s->sws -= fsize;
Willy Tarreau0f799ca2018-12-04 15:20:11 +01005918 h2c->mws -= fsize;
Willy Tarreauee573762018-12-04 15:25:57 +01005919 count -= fsize;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005920
5921 send_empty:
5922 /* update the frame's size */
5923 h2_set_frame_size(outbuf.area, fsize);
5924
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005925 /* consume incoming HTX block */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005926 total += fsize;
5927 if (fsize == bsize) {
5928 htx_remove_blk(htx, blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005929 if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx)) {
5930 /* EOM+empty: we may need to add END_STREAM (except for tunneled
5931 * message)
5932 */
5933 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5934 es_now = 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02005935 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005936 }
5937 else {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005938 /* we've truncated this block */
5939 htx_cut_data_blk(htx, blk, fsize);
5940 }
5941
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005942 if (es_now)
5943 outbuf.area[4] |= H2_F_DATA_END_STREAM;
5944
5945 /* commit the H2 response */
5946 b_add(mbuf, fsize + 9);
5947
Christopher Faulet925abdf2021-04-27 22:51:07 +02005948 out:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005949 if (es_now) {
5950 if (h2s->st == H2_SS_OPEN)
5951 h2s->st = H2_SS_HLOC;
5952 else
5953 h2s_close(h2s);
5954
5955 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005956 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 +01005957 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005958 else if (fsize) {
5959 if (fsize == bsize) {
5960 TRACE_DEVEL("more data may be available, trying to send another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5961 goto new_frame;
5962 }
5963 else if (trunc_out) {
5964 /* we've truncated this block */
5965 goto new_frame;
5966 }
5967 }
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005968
5969 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005970 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005971 return total;
5972}
5973
Christopher Faulet991febd2020-12-02 15:17:31 +01005974/* Skip the message payload (DATA blocks) and emit an empty DATA frame with the
5975 * ES flag set for stream <h2s>. This function is called for response known to
5976 * have no payload. Only DATA blocks are skipped. This means the trailers are
Ilya Shipitsinacf84592021-02-06 22:29:08 +05005977 * still emitted. The caller must check the stream's status to detect any error
Christopher Faulet991febd2020-12-02 15:17:31 +01005978 * which might have happened subsequently to a successful send. Returns the
5979 * number of data bytes consumed, or zero if nothing done.
5980 */
5981static size_t h2s_skip_data(struct h2s *h2s, struct buffer *buf, size_t count)
5982{
5983 struct h2c *h2c = h2s->h2c;
5984 struct htx *htx;
5985 int bsize; /* htx block size */
5986 int fsize; /* h2 frame size */
5987 struct htx_blk *blk;
5988 enum htx_blk_type type;
5989 size_t total = 0;
5990
5991 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5992
5993 if (h2c_mux_busy(h2c, h2s)) {
5994 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5995 h2s->flags |= H2_SF_BLK_MBUSY;
5996 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5997 goto end;
5998 }
5999
6000 htx = htx_from_buf(buf);
6001
6002 next_data:
6003 if (!count || htx_is_empty(htx))
6004 goto end;
6005 blk = htx_get_head_blk(htx);
6006 type = htx_get_blk_type(blk);
6007 bsize = htx_get_blksz(blk);
6008 fsize = bsize;
6009 if (type != HTX_BLK_DATA)
6010 goto end;
6011
6012 if (fsize > count)
6013 fsize = count;
6014
6015 if (fsize != bsize)
6016 goto skip_data;
6017
6018 if (!(htx->flags & HTX_FL_EOM) || !htx_is_unique_blk(htx, blk))
6019 goto skip_data;
6020
6021 /* Here, it is the last block and it is also the end of the message. So
6022 * we can emit an empty DATA frame with the ES flag set
6023 */
6024 if (h2_send_empty_data_es(h2s) <= 0)
6025 goto end;
6026
6027 if (h2s->st == H2_SS_OPEN)
6028 h2s->st = H2_SS_HLOC;
6029 else
6030 h2s_close(h2s);
6031
6032 skip_data:
6033 /* consume incoming HTX block */
6034 total += fsize;
6035 if (fsize == bsize) {
6036 TRACE_DEVEL("more data may be available, trying to skip another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6037 htx_remove_blk(htx, blk);
6038 goto next_data;
6039 }
6040 else {
6041 /* we've truncated this block */
6042 htx_cut_data_blk(htx, blk, fsize);
6043 }
6044
6045 end:
6046 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6047 return total;
6048}
6049
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006050/* Try to send a HEADERS frame matching HTX_BLK_TLR series of blocks present in
6051 * HTX message <htx> for the H2 stream <h2s>. Returns the number of bytes
6052 * processed. The caller must check the stream's status to detect any error
6053 * which might have happened subsequently to a successful send. The htx blocks
6054 * are automatically removed from the message. The htx message is assumed to be
6055 * valid since produced from the internal code. Processing stops when meeting
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006056 * the EOT, which *is* removed. All trailers are processed at once and sent as a
6057 * single frame. The ES flag is always set.
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006058 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006059static size_t h2s_make_trailers(struct h2s *h2s, struct htx *htx)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006060{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02006061 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006062 struct h2c *h2c = h2s->h2c;
6063 struct htx_blk *blk;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006064 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02006065 struct buffer *mbuf;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006066 enum htx_blk_type type;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006067 int ret = 0;
6068 int hdr;
6069 int idx;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006070
Willy Tarreau7838a792019-08-12 18:42:03 +02006071 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
6072
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006073 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006074 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006075 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02006076 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006077 goto end;
6078 }
6079
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006080 /* get trailers. */
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006081 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006082 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006083 type = htx_get_blk_type(blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006084
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006085 if (type == HTX_BLK_UNUSED)
6086 continue;
6087
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006088 if (type == HTX_BLK_EOT)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006089 break;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006090 if (type == HTX_BLK_TLR) {
6091 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
6092 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
6093 goto fail;
6094 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006095
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006096 list[hdr].n = htx_get_blk_name(htx, blk);
6097 list[hdr].v = htx_get_blk_value(htx, blk);
6098 hdr++;
6099 }
6100 else {
6101 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 +01006102 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02006103 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006104 }
6105
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006106 /* marker for end of trailers */
6107 list[hdr].n = ist("");
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006108
Willy Tarreau9c218e72019-05-26 10:08:28 +02006109 mbuf = br_tail(h2c->mbuf);
6110 retry:
6111 if (!h2_get_buf(h2c, mbuf)) {
6112 h2c->flags |= H2_CF_MUX_MALLOC;
6113 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02006114 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 +02006115 goto end;
6116 }
6117
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006118 chunk_reset(&outbuf);
6119
6120 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02006121 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
6122 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006123 break;
6124 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02006125 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006126 }
6127
6128 if (outbuf.size < 9)
6129 goto full;
6130
6131 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4,ES=1 */
6132 memcpy(outbuf.area, "\x00\x00\x00\x01\x05", 5);
6133 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
6134 outbuf.data = 9;
6135
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006136 /* encode all headers */
6137 for (idx = 0; idx < hdr; idx++) {
6138 /* these ones do not exist in H2 or must not appear in
6139 * trailers and must be dropped.
6140 */
6141 if (isteq(list[idx].n, ist("host")) ||
6142 isteq(list[idx].n, ist("content-length")) ||
6143 isteq(list[idx].n, ist("connection")) ||
6144 isteq(list[idx].n, ist("proxy-connection")) ||
6145 isteq(list[idx].n, ist("keep-alive")) ||
6146 isteq(list[idx].n, ist("upgrade")) ||
6147 isteq(list[idx].n, ist("te")) ||
6148 isteq(list[idx].n, ist("transfer-encoding")))
6149 continue;
6150
Christopher Faulet86d144c2019-08-14 16:32:25 +02006151 /* Skip all pseudo-headers */
6152 if (*(list[idx].n.ptr) == ':')
6153 continue;
6154
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006155 if (!hpack_encode_header(&outbuf, list[idx].n, list[idx].v)) {
6156 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02006157 if (b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006158 goto realign_again;
6159 goto full;
6160 }
6161 }
6162
Willy Tarreau5121e5d2019-05-06 15:13:41 +02006163 if (outbuf.data == 9) {
6164 /* here we have a problem, we have nothing to emit (either we
6165 * received an empty trailers block followed or we removed its
6166 * contents above). Because of this we can't send a HEADERS
6167 * frame, so we have to cheat and instead send an empty DATA
6168 * frame conveying the ES flag.
Willy Tarreau67b8cae2019-02-21 18:16:35 +01006169 */
6170 outbuf.area[3] = H2_FT_DATA;
6171 outbuf.area[4] = H2_F_DATA_END_STREAM;
6172 }
6173
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006174 /* update the frame's size */
6175 h2_set_frame_size(outbuf.area, outbuf.data - 9);
6176
Willy Tarreau572d9f52019-10-11 16:58:37 +02006177 if (outbuf.data > h2c->mfs + 9) {
6178 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
6179 /* output full */
6180 if (b_space_wraps(mbuf))
6181 goto realign_again;
6182 goto full;
6183 }
6184 }
6185
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006186 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02006187 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 +02006188 b_add(mbuf, outbuf.data);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006189 h2s->flags |= H2_SF_ES_SENT;
6190
6191 if (h2s->st == H2_SS_OPEN)
6192 h2s->st = H2_SS_HLOC;
6193 else
6194 h2s_close(h2s);
6195
6196 /* OK we could properly deliver the response */
6197 done:
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02006198 /* remove all header blocks till the end and compute the corresponding size. */
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006199 ret = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006200 blk = htx_get_head_blk(htx);
6201 while (blk) {
6202 type = htx_get_blk_type(blk);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006203 ret += htx_get_blksz(blk);
6204 blk = htx_remove_blk(htx, blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006205 /* The removed block is the EOT */
6206 if (type == HTX_BLK_EOT)
6207 break;
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006208 }
6209
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006210 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02006211 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006212 return ret;
6213 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02006214 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
6215 goto retry;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006216 h2c->flags |= H2_CF_MUX_MFULL;
6217 h2s->flags |= H2_SF_BLK_MROOM;
6218 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006219 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 +01006220 goto end;
6221 fail:
6222 /* unparsable HTX messages, too large ones to be produced in the local
6223 * list etc go here (unrecoverable errors).
6224 */
6225 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
6226 ret = 0;
6227 goto end;
6228}
6229
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006230/* Called from the upper layer, to subscribe <es> to events <event_type>. The
6231 * event subscriber <es> is not allowed to change from a previous call as long
6232 * as at least one event is still subscribed. The <event_type> must only be a
6233 * combination of SUB_RETRY_RECV and SUB_RETRY_SEND. It always returns 0.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006234 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006235static int h2_subscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard6ff20392018-07-17 18:46:31 +02006236{
Olivier Houchard6ff20392018-07-17 18:46:31 +02006237 struct h2s *h2s = cs->ctx;
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02006238 struct h2c *h2c = h2s->h2c;
Olivier Houchard6ff20392018-07-17 18:46:31 +02006239
Willy Tarreau7838a792019-08-12 18:42:03 +02006240 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006241
6242 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006243 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006244
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006245 es->events |= event_type;
6246 h2s->subs = es;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006247
6248 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006249 TRACE_DEVEL("subscribe(recv)", H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006250
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006251 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006252 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2c->conn, h2s);
Olivier Houchardf8338152019-05-14 17:50:32 +02006253 if (!(h2s->flags & H2_SF_BLK_SFCTL) &&
Willy Tarreau2b718102021-04-21 07:32:39 +02006254 !LIST_INLIST(&h2s->list)) {
Olivier Houchardf8338152019-05-14 17:50:32 +02006255 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02006256 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Olivier Houchardf8338152019-05-14 17:50:32 +02006257 else
Willy Tarreau2b718102021-04-21 07:32:39 +02006258 LIST_APPEND(&h2c->send_list, &h2s->list);
Olivier Houcharde1c6dbc2018-08-01 17:06:43 +02006259 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02006260 }
Willy Tarreau7838a792019-08-12 18:42:03 +02006261 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006262 return 0;
Olivier Houchard6ff20392018-07-17 18:46:31 +02006263}
6264
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006265/* Called from the upper layer, to unsubscribe <es> from events <event_type>.
6266 * The <es> pointer is not allowed to differ from the one passed to the
6267 * subscribe() call. It always returns zero.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006268 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006269static int h2_unsubscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006270{
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006271 struct h2s *h2s = cs->ctx;
6272
Willy Tarreau7838a792019-08-12 18:42:03 +02006273 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006274
6275 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006276 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006277
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006278 es->events &= ~event_type;
6279 if (!es->events)
Willy Tarreauf96508a2020-01-10 11:12:48 +01006280 h2s->subs = NULL;
6281
6282 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006283 TRACE_DEVEL("unsubscribe(recv)", H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006284
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006285 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006286 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006287 h2s->flags &= ~H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006288 if (!(h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)))
6289 LIST_DEL_INIT(&h2s->list);
Olivier Houchardd846c262018-10-19 17:24:29 +02006290 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01006291
Willy Tarreau7838a792019-08-12 18:42:03 +02006292 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006293 return 0;
6294}
6295
6296
Christopher Faulet564e39c2021-09-21 15:50:55 +02006297/* Called from the upper layer, to receive data
6298 *
6299 * The caller is responsible for defragmenting <buf> if necessary. But <flags>
6300 * must be tested to know the calling context. If CO_RFL_BUF_FLUSH is set, it
6301 * means the caller wants to flush input data (from the mux buffer and the
6302 * channel buffer) to be able to use kernel splicing or any kind of mux-to-mux
6303 * xfer. If CO_RFL_KEEP_RECV is set, the mux must always subscribe for read
6304 * events before giving back. CO_RFL_BUF_WET is set if <buf> is congested with
6305 * data scheduled for leaving soon. CO_RFL_BUF_NOT_STUCK is set to instruct the
6306 * mux it may optimize the data copy to <buf> if necessary. Otherwise, it should
6307 * copy as much data as possible.
6308 */
Olivier Houchard511efea2018-08-16 15:30:32 +02006309static size_t h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
6310{
Olivier Houchard638b7992018-08-16 15:41:52 +02006311 struct h2s *h2s = cs->ctx;
Willy Tarreau082f5592018-11-25 08:03:32 +01006312 struct h2c *h2c = h2s->h2c;
Willy Tarreau86724e22018-12-01 23:19:43 +01006313 struct htx *h2s_htx = NULL;
6314 struct htx *buf_htx = NULL;
Olivier Houchard511efea2018-08-16 15:30:32 +02006315 size_t ret = 0;
6316
Willy Tarreau7838a792019-08-12 18:42:03 +02006317 TRACE_ENTER(H2_EV_STRM_RECV, h2c->conn, h2s);
6318
Olivier Houchard511efea2018-08-16 15:30:32 +02006319 /* transfer possibly pending data to the upper layer */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006320 h2s_htx = htx_from_buf(&h2s->rxbuf);
6321 if (htx_is_empty(h2s_htx)) {
6322 /* Here htx_to_buf() will set buffer data to 0 because
6323 * the HTX is empty.
6324 */
6325 htx_to_buf(h2s_htx, &h2s->rxbuf);
6326 goto end;
6327 }
Willy Tarreau7196dd62019-03-05 10:51:11 +01006328
Christopher Faulet9b79a102019-07-15 11:22:56 +02006329 ret = h2s_htx->data;
6330 buf_htx = htx_from_buf(buf);
Willy Tarreau7196dd62019-03-05 10:51:11 +01006331
Christopher Faulet9b79a102019-07-15 11:22:56 +02006332 /* <buf> is empty and the message is small enough, swap the
6333 * buffers. */
6334 if (htx_is_empty(buf_htx) && htx_used_space(h2s_htx) <= count) {
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01006335 htx_to_buf(buf_htx, buf);
6336 htx_to_buf(h2s_htx, &h2s->rxbuf);
Christopher Faulet9b79a102019-07-15 11:22:56 +02006337 b_xfer(buf, &h2s->rxbuf, b_data(&h2s->rxbuf));
6338 goto end;
Willy Tarreau86724e22018-12-01 23:19:43 +01006339 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02006340
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006341 htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_UNUSED);
Christopher Faulet9b79a102019-07-15 11:22:56 +02006342
6343 if (h2s_htx->flags & HTX_FL_PARSING_ERROR) {
6344 buf_htx->flags |= HTX_FL_PARSING_ERROR;
6345 if (htx_is_empty(buf_htx))
6346 cs->flags |= CS_FL_EOI;
Willy Tarreau86724e22018-12-01 23:19:43 +01006347 }
Christopher Faulet810df062020-07-22 16:20:34 +02006348 else if (htx_is_empty(h2s_htx))
Christopher Faulet42432f32020-11-20 17:43:16 +01006349 buf_htx->flags |= (h2s_htx->flags & HTX_FL_EOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02006350
Christopher Faulet9b79a102019-07-15 11:22:56 +02006351 buf_htx->extra = (h2s_htx->extra ? (h2s_htx->data + h2s_htx->extra) : 0);
6352 htx_to_buf(buf_htx, buf);
6353 htx_to_buf(h2s_htx, &h2s->rxbuf);
6354 ret -= h2s_htx->data;
6355
Christopher Faulet37070b22019-02-14 15:12:14 +01006356 end:
Olivier Houchard638b7992018-08-16 15:41:52 +02006357 if (b_data(&h2s->rxbuf))
Olivier Houchardd247be02018-12-06 16:22:29 +01006358 cs->flags |= (CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02006359 else {
Olivier Houchardd247be02018-12-06 16:22:29 +01006360 cs->flags &= ~(CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Christopher Fauletd0db4232021-01-22 11:46:30 +01006361 if (h2s->flags & H2_SF_ES_RCVD) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02006362 cs->flags |= CS_FL_EOI;
Christopher Fauletd0db4232021-01-22 11:46:30 +01006363 /* Add EOS flag for tunnel */
6364 if (h2s->flags & H2_SF_BODY_TUNNEL)
6365 cs->flags |= CS_FL_EOS;
6366 }
Christopher Fauletaade4ed2020-10-08 15:38:41 +02006367 if (h2c_read0_pending(h2c) || h2s->st == H2_SS_CLOSED)
Olivier Houchard511efea2018-08-16 15:30:32 +02006368 cs->flags |= CS_FL_EOS;
Olivier Houchard71748cb2018-12-17 14:16:46 +01006369 if (cs->flags & CS_FL_ERR_PENDING)
6370 cs->flags |= CS_FL_ERROR;
Olivier Houchard638b7992018-08-16 15:41:52 +02006371 if (b_size(&h2s->rxbuf)) {
6372 b_free(&h2s->rxbuf);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01006373 offer_buffers(NULL, 1);
Olivier Houchard638b7992018-08-16 15:41:52 +02006374 }
Olivier Houchard511efea2018-08-16 15:30:32 +02006375 }
6376
Willy Tarreau082f5592018-11-25 08:03:32 +01006377 if (ret && h2c->dsi == h2s->id) {
6378 /* demux is blocking on this stream's buffer */
6379 h2c->flags &= ~H2_CF_DEM_SFULL;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02006380 h2c_restart_reading(h2c, 1);
Willy Tarreau082f5592018-11-25 08:03:32 +01006381 }
Christopher Faulet37070b22019-02-14 15:12:14 +01006382
Willy Tarreau7838a792019-08-12 18:42:03 +02006383 TRACE_LEAVE(H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard511efea2018-08-16 15:30:32 +02006384 return ret;
6385}
6386
Olivier Houchardd846c262018-10-19 17:24:29 +02006387
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006388/* Called from the upper layer, to send data from buffer <buf> for no more than
6389 * <count> bytes. Returns the number of bytes effectively sent. Some status
6390 * flags may be updated on the conn_stream.
6391 */
Christopher Fauletd44a9b32018-07-27 11:59:41 +02006392static size_t h2_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
Willy Tarreau62f52692017-10-08 23:01:42 +02006393{
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006394 struct h2s *h2s = cs->ctx;
Willy Tarreau1dc41e72018-06-14 13:21:28 +02006395 size_t total = 0;
Willy Tarreau5dd17352018-06-14 13:33:30 +02006396 size_t ret;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006397 struct htx *htx;
6398 struct htx_blk *blk;
6399 enum htx_blk_type btype;
6400 uint32_t bsize;
6401 int32_t idx;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006402
Willy Tarreau7838a792019-08-12 18:42:03 +02006403 TRACE_ENTER(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
6404
Olivier Houchardd360ac62019-03-22 17:37:16 +01006405 /* If we were not just woken because we wanted to send but couldn't,
6406 * and there's somebody else that is waiting to send, do nothing,
6407 * we will subscribe later and be put at the end of the list
6408 */
Willy Tarreaud9464162020-01-10 18:25:07 +01006409 if (!(h2s->flags & H2_SF_NOTIFIED) &&
Willy Tarreau7838a792019-08-12 18:42:03 +02006410 (!LIST_ISEMPTY(&h2s->h2c->send_list) || !LIST_ISEMPTY(&h2s->h2c->fctl_list))) {
6411 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 +01006412 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006413 }
Willy Tarreaud9464162020-01-10 18:25:07 +01006414 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02006415
Willy Tarreau7838a792019-08-12 18:42:03 +02006416 if (h2s->h2c->st0 < H2_CS_FRAME_H) {
6417 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 +02006418 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006419 }
Willy Tarreau6bf641a2018-10-08 09:43:03 +02006420
Willy Tarreaucab22952019-10-31 15:48:18 +01006421 if (h2s->h2c->st0 >= H2_CS_ERROR) {
6422 cs->flags |= CS_FL_ERROR;
6423 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);
6424 return 0;
6425 }
6426
Christopher Faulet9b79a102019-07-15 11:22:56 +02006427 htx = htx_from_buf(buf);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006428
Willy Tarreau0bad0432018-06-14 16:54:01 +02006429 if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count)
Willy Tarreauc4312d32017-11-07 12:01:53 +01006430 h2s->flags |= H2_SF_OUTGOING_DATA;
6431
Willy Tarreau751f2d02018-10-05 09:35:00 +02006432 if (h2s->id == 0) {
6433 int32_t id = h2c_get_next_sid(h2s->h2c);
6434
6435 if (id < 0) {
Willy Tarreau751f2d02018-10-05 09:35:00 +02006436 cs->flags |= CS_FL_ERROR;
Willy Tarreau7838a792019-08-12 18:42:03 +02006437 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 +02006438 return 0;
6439 }
6440
6441 eb32_delete(&h2s->by_id);
6442 h2s->by_id.key = h2s->id = id;
6443 h2s->h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01006444 h2s->h2c->nb_reserved--;
Willy Tarreau751f2d02018-10-05 09:35:00 +02006445 eb32_insert(&h2s->h2c->streams_by_id, &h2s->by_id);
6446 }
6447
Christopher Faulet9b79a102019-07-15 11:22:56 +02006448 while (h2s->st < H2_SS_HLOC && !(h2s->flags & H2_SF_BLK_ANY) &&
6449 count && !htx_is_empty(htx)) {
6450 idx = htx_get_head(htx);
6451 blk = htx_get_blk(htx, idx);
6452 btype = htx_get_blk_type(blk);
6453 bsize = htx_get_blksz(blk);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006454
Christopher Faulet9b79a102019-07-15 11:22:56 +02006455 switch (btype) {
Willy Tarreau80739692018-10-05 11:35:57 +02006456 case HTX_BLK_REQ_SL:
6457 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006458 ret = h2s_bck_make_req_headers(h2s, htx);
Willy Tarreau80739692018-10-05 11:35:57 +02006459 if (ret > 0) {
6460 total += ret;
6461 count -= ret;
6462 if (ret < bsize)
6463 goto done;
6464 }
6465 break;
6466
Willy Tarreau115e83b2018-12-01 19:17:53 +01006467 case HTX_BLK_RES_SL:
6468 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006469 ret = h2s_frt_make_resp_headers(h2s, htx);
Willy Tarreau115e83b2018-12-01 19:17:53 +01006470 if (ret > 0) {
6471 total += ret;
6472 count -= ret;
6473 if (ret < bsize)
6474 goto done;
6475 }
6476 break;
6477
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006478 case HTX_BLK_DATA:
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006479 /* all these cause the emission of a DATA frame (possibly empty) */
Christopher Faulet991febd2020-12-02 15:17:31 +01006480 if (!(h2s->h2c->flags & H2_CF_IS_BACK) &&
6481 (h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_BODYLESS_RESP)) == H2_SF_BODYLESS_RESP)
6482 ret = h2s_skip_data(h2s, buf, count);
6483 else
6484 ret = h2s_make_data(h2s, buf, count);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006485 if (ret > 0) {
Willy Tarreau98de12a2018-12-12 07:03:00 +01006486 htx = htx_from_buf(buf);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006487 total += ret;
6488 count -= ret;
6489 if (ret < bsize)
6490 goto done;
6491 }
6492 break;
6493
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006494 case HTX_BLK_TLR:
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006495 case HTX_BLK_EOT:
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006496 /* This is the first trailers block, all the subsequent ones */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006497 ret = h2s_make_trailers(h2s, htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006498 if (ret > 0) {
6499 total += ret;
6500 count -= ret;
6501 if (ret < bsize)
6502 goto done;
6503 }
6504 break;
6505
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006506 default:
6507 htx_remove_blk(htx, blk);
6508 total += bsize;
6509 count -= bsize;
6510 break;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006511 }
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006512 }
6513
Christopher Faulet9b79a102019-07-15 11:22:56 +02006514 done:
Willy Tarreau2b778482019-05-06 15:00:22 +02006515 if (h2s->st >= H2_SS_HLOC) {
Willy Tarreau00610962018-07-19 10:58:28 +02006516 /* trim any possibly pending data after we close (extra CR-LF,
6517 * unprocessed trailers, abnormal extra data, ...)
6518 */
Willy Tarreau0bad0432018-06-14 16:54:01 +02006519 total += count;
6520 count = 0;
Willy Tarreau00610962018-07-19 10:58:28 +02006521 }
6522
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006523 /* RST are sent similarly to frame acks */
Willy Tarreau02492192017-12-07 15:59:29 +01006524 if (h2s->st == H2_SS_ERROR || h2s->flags & H2_SF_RST_RCVD) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006525 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 +01006526 cs_set_error(cs);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01006527 if (h2s_send_rst_stream(h2s->h2c, h2s) > 0)
Willy Tarreau00dd0782018-03-01 16:31:34 +01006528 h2s_close(h2s);
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006529 }
6530
Christopher Faulet9b79a102019-07-15 11:22:56 +02006531 htx_to_buf(htx, buf);
Olivier Houchardd846c262018-10-19 17:24:29 +02006532
Olivier Houchard7505f942018-08-21 18:10:44 +02006533 if (total > 0) {
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006534 if (!(h2s->h2c->wait_event.events & SUB_RETRY_SEND)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006535 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 +02006536 tasklet_wakeup(h2s->h2c->wait_event.tasklet);
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006537 }
Olivier Houchardd846c262018-10-19 17:24:29 +02006538
Olivier Houchard7505f942018-08-21 18:10:44 +02006539 }
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01006540 /* If we're waiting for flow control, and we got a shutr on the
6541 * connection, we will never be unlocked, so add an error on
6542 * the conn_stream.
6543 */
6544 if (conn_xprt_read0_pending(h2s->h2c->conn) &&
6545 !b_data(&h2s->h2c->dbuf) &&
6546 (h2s->flags & (H2_SF_BLK_SFCTL | H2_SF_BLK_MFCTL))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006547 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 +01006548 if (cs->flags & CS_FL_EOS)
6549 cs->flags |= CS_FL_ERROR;
6550 else
6551 cs->flags |= CS_FL_ERR_PENDING;
6552 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006553
Willy Tarreau5723f292020-01-10 15:16:57 +01006554 if (total > 0 && !(h2s->flags & H2_SF_BLK_SFCTL) &&
6555 !(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006556 /* Ok we managed to send something, leave the send_list if we were still there */
Olivier Houchardd360ac62019-03-22 17:37:16 +01006557 LIST_DEL_INIT(&h2s->list);
6558 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006559
Willy Tarreau7838a792019-08-12 18:42:03 +02006560 TRACE_LEAVE(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006561 return total;
Willy Tarreau62f52692017-10-08 23:01:42 +02006562}
6563
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006564/* for debugging with CLI's "show fd" command */
Willy Tarreau8050efe2021-01-21 08:26:06 +01006565static int h2_show_fd(struct buffer *msg, struct connection *conn)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006566{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01006567 struct h2c *h2c = conn->ctx;
Willy Tarreau987c0632018-12-18 10:32:05 +01006568 struct h2s *h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006569 struct eb32_node *node;
6570 int fctl_cnt = 0;
6571 int send_cnt = 0;
6572 int tree_cnt = 0;
6573 int orph_cnt = 0;
Willy Tarreau60f62682019-05-26 11:32:27 +02006574 struct buffer *hmbuf, *tmbuf;
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006575 int ret = 0;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006576
6577 if (!h2c)
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006578 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006579
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006580 list_for_each_entry(h2s, &h2c->fctl_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006581 fctl_cnt++;
6582
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006583 list_for_each_entry(h2s, &h2c->send_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006584 send_cnt++;
6585
Willy Tarreau3af37712018-12-18 14:34:41 +01006586 h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006587 node = eb32_first(&h2c->streams_by_id);
6588 while (node) {
6589 h2s = container_of(node, struct h2s, by_id);
6590 tree_cnt++;
6591 if (!h2s->cs)
6592 orph_cnt++;
6593 node = eb32_next(node);
6594 }
6595
Willy Tarreau60f62682019-05-26 11:32:27 +02006596 hmbuf = br_head(h2c->mbuf);
Willy Tarreaubcc45952019-05-26 10:05:50 +02006597 tmbuf = br_tail(h2c->mbuf);
Willy Tarreauab2ec452019-08-30 07:07:08 +02006598 chunk_appendf(msg, " h2c.st0=%s .err=%d .maxid=%d .lastid=%d .flg=0x%04x"
Willy Tarreau987c0632018-12-18 10:32:05 +01006599 " .nbst=%u .nbcs=%u .fctl_cnt=%d .send_cnt=%d .tree_cnt=%d"
Willy Tarreau60f62682019-05-26 11:32:27 +02006600 " .orph_cnt=%d .sub=%d .dsi=%d .dbuf=%u@%p+%u/%u .msi=%d"
6601 " .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]",
Willy Tarreauab2ec452019-08-30 07:07:08 +02006602 h2c_st_to_str(h2c->st0), h2c->errcode, h2c->max_id, h2c->last_sid, h2c->flags,
Willy Tarreau616ac812018-07-24 14:12:42 +02006603 h2c->nb_streams, h2c->nb_cs, fctl_cnt, send_cnt, tree_cnt, orph_cnt,
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006604 h2c->wait_event.events, h2c->dsi,
Willy Tarreau987c0632018-12-18 10:32:05 +01006605 (unsigned int)b_data(&h2c->dbuf), b_orig(&h2c->dbuf),
6606 (unsigned int)b_head_ofs(&h2c->dbuf), (unsigned int)b_size(&h2c->dbuf),
6607 h2c->msi,
Willy Tarreau60f62682019-05-26 11:32:27 +02006608 br_head_idx(h2c->mbuf), br_tail_idx(h2c->mbuf), br_size(h2c->mbuf),
6609 (unsigned int)b_data(hmbuf), b_orig(hmbuf),
6610 (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf),
Willy Tarreaubcc45952019-05-26 10:05:50 +02006611 (unsigned int)b_data(tmbuf), b_orig(tmbuf),
6612 (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf));
Willy Tarreau987c0632018-12-18 10:32:05 +01006613
6614 if (h2s) {
Willy Tarreaued4464e2021-01-20 15:50:03 +01006615 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 +02006616 h2s, h2s->id, h2s_st_to_str(h2s->st), h2s->flags,
Willy Tarreau987c0632018-12-18 10:32:05 +01006617 (unsigned int)b_data(&h2s->rxbuf), b_orig(&h2s->rxbuf),
6618 (unsigned int)b_head_ofs(&h2s->rxbuf), (unsigned int)b_size(&h2s->rxbuf),
6619 h2s->cs);
6620 if (h2s->cs)
Willy Tarreau98e40b92021-01-20 16:27:01 +01006621 chunk_appendf(msg, "(.flg=0x%08x .data=%p)",
Willy Tarreau987c0632018-12-18 10:32:05 +01006622 h2s->cs->flags, h2s->cs->data);
Willy Tarreau98e40b92021-01-20 16:27:01 +01006623
6624 chunk_appendf(&trash, " .subs=%p", h2s->subs);
6625 if (h2s->subs) {
Christopher Faulet6c93c4e2021-02-25 10:06:29 +01006626 chunk_appendf(&trash, "(ev=%d tl=%p", h2s->subs->events, h2s->subs->tasklet);
6627 chunk_appendf(&trash, " tl.calls=%d tl.ctx=%p tl.fct=",
6628 h2s->subs->tasklet->calls,
6629 h2s->subs->tasklet->context);
6630 if (h2s->subs->tasklet->calls >= 1000000)
6631 ret = 1;
6632 resolve_sym_name(&trash, NULL, h2s->subs->tasklet->process);
6633 chunk_appendf(&trash, ")");
Willy Tarreau98e40b92021-01-20 16:27:01 +01006634 }
Willy Tarreau987c0632018-12-18 10:32:05 +01006635 }
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006636 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006637}
Willy Tarreau62f52692017-10-08 23:01:42 +02006638
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006639/* Migrate the the connection to the current thread.
6640 * Return 0 if successful, non-zero otherwise.
6641 * Expected to be called with the old thread lock held.
6642 */
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006643static int h2_takeover(struct connection *conn, int orig_tid)
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006644{
6645 struct h2c *h2c = conn->ctx;
Willy Tarreau617e80f2020-07-01 16:39:33 +02006646 struct task *task;
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006647
6648 if (fd_takeover(conn->handle.fd, conn) != 0)
6649 return -1;
Olivier Houcharda74bb7e2020-07-03 14:01:21 +02006650
6651 if (conn->xprt->takeover && conn->xprt->takeover(conn, conn->xprt_ctx, orig_tid) != 0) {
6652 /* We failed to takeover the xprt, even if the connection may
6653 * still be valid, flag it as error'd, as we have already
6654 * taken over the fd, and wake the tasklet, so that it will
6655 * destroy it.
6656 */
6657 conn->flags |= CO_FL_ERROR;
6658 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
6659 return -1;
6660 }
6661
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006662 if (h2c->wait_event.events)
6663 h2c->conn->xprt->unsubscribe(h2c->conn, h2c->conn->xprt_ctx,
6664 h2c->wait_event.events, &h2c->wait_event);
6665 /* To let the tasklet know it should free itself, and do nothing else,
6666 * set its context to NULL.
6667 */
6668 h2c->wait_event.tasklet->context = NULL;
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006669 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
Willy Tarreau617e80f2020-07-01 16:39:33 +02006670
6671 task = h2c->task;
6672 if (task) {
6673 task->context = NULL;
6674 h2c->task = NULL;
6675 __ha_barrier_store();
6676 task_kill(task);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006677
Willy Tarreaubeeabf52021-10-01 18:23:30 +02006678 h2c->task = task_new_here();
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006679 if (!h2c->task) {
6680 h2_release(h2c);
6681 return -1;
6682 }
6683 h2c->task->process = h2_timeout_task;
6684 h2c->task->context = h2c;
6685 }
6686 h2c->wait_event.tasklet = tasklet_new();
6687 if (!h2c->wait_event.tasklet) {
6688 h2_release(h2c);
6689 return -1;
6690 }
6691 h2c->wait_event.tasklet->process = h2_io_cb;
6692 h2c->wait_event.tasklet->context = h2c;
6693 h2c->conn->xprt->subscribe(h2c->conn, h2c->conn->xprt_ctx,
6694 SUB_RETRY_RECV, &h2c->wait_event);
6695
6696 return 0;
6697}
6698
Willy Tarreau62f52692017-10-08 23:01:42 +02006699/*******************************************************/
6700/* functions below are dedicated to the config parsers */
6701/*******************************************************/
6702
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006703/* config parser for global "tune.h2.header-table-size" */
6704static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006705 const struct proxy *defpx, const char *file, int line,
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006706 char **err)
6707{
6708 if (too_many_args(1, args, err, NULL))
6709 return -1;
6710
6711 h2_settings_header_table_size = atoi(args[1]);
6712 if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) {
6713 memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]);
6714 return -1;
6715 }
6716 return 0;
6717}
Willy Tarreau62f52692017-10-08 23:01:42 +02006718
Willy Tarreaue6baec02017-07-27 11:45:11 +02006719/* config parser for global "tune.h2.initial-window-size" */
6720static int h2_parse_initial_window_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006721 const struct proxy *defpx, const char *file, int line,
Willy Tarreaue6baec02017-07-27 11:45:11 +02006722 char **err)
6723{
6724 if (too_many_args(1, args, err, NULL))
6725 return -1;
6726
6727 h2_settings_initial_window_size = atoi(args[1]);
6728 if (h2_settings_initial_window_size < 0) {
6729 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6730 return -1;
6731 }
6732 return 0;
6733}
6734
Willy Tarreau5242ef82017-07-27 11:47:28 +02006735/* config parser for global "tune.h2.max-concurrent-streams" */
6736static int h2_parse_max_concurrent_streams(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006737 const struct proxy *defpx, const char *file, int line,
Willy Tarreau5242ef82017-07-27 11:47:28 +02006738 char **err)
6739{
6740 if (too_many_args(1, args, err, NULL))
6741 return -1;
6742
6743 h2_settings_max_concurrent_streams = atoi(args[1]);
Willy Tarreau5a490b62019-01-31 10:39:51 +01006744 if ((int)h2_settings_max_concurrent_streams < 0) {
Willy Tarreau5242ef82017-07-27 11:47:28 +02006745 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6746 return -1;
6747 }
6748 return 0;
6749}
6750
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006751/* config parser for global "tune.h2.max-frame-size" */
6752static int h2_parse_max_frame_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006753 const struct proxy *defpx, const char *file, int line,
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006754 char **err)
6755{
6756 if (too_many_args(1, args, err, NULL))
6757 return -1;
6758
6759 h2_settings_max_frame_size = atoi(args[1]);
6760 if (h2_settings_max_frame_size < 16384 || h2_settings_max_frame_size > 16777215) {
6761 memprintf(err, "'%s' expects a numeric value between 16384 and 16777215.", args[0]);
6762 return -1;
6763 }
6764 return 0;
6765}
6766
Willy Tarreau62f52692017-10-08 23:01:42 +02006767
6768/****************************************/
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05006769/* MUX initialization and instantiation */
Willy Tarreau62f52692017-10-08 23:01:42 +02006770/***************************************/
6771
6772/* The mux operations */
Willy Tarreau680b2bd2018-11-27 07:30:17 +01006773static const struct mux_ops h2_ops = {
Willy Tarreau62f52692017-10-08 23:01:42 +02006774 .init = h2_init,
Olivier Houchard21df6cc2018-09-14 23:21:44 +02006775 .wake = h2_wake,
Willy Tarreau62f52692017-10-08 23:01:42 +02006776 .snd_buf = h2_snd_buf,
Olivier Houchard511efea2018-08-16 15:30:32 +02006777 .rcv_buf = h2_rcv_buf,
Olivier Houchard6ff20392018-07-17 18:46:31 +02006778 .subscribe = h2_subscribe,
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006779 .unsubscribe = h2_unsubscribe,
Willy Tarreau62f52692017-10-08 23:01:42 +02006780 .attach = h2_attach,
Willy Tarreaufafd3982018-11-18 21:29:20 +01006781 .get_first_cs = h2_get_first_cs,
Willy Tarreau62f52692017-10-08 23:01:42 +02006782 .detach = h2_detach,
Olivier Houchard060ed432018-11-06 16:32:42 +01006783 .destroy = h2_destroy,
Olivier Houchardd540b362018-11-05 18:37:53 +01006784 .avail_streams = h2_avail_streams,
Willy Tarreau00f18a32019-01-26 12:19:01 +01006785 .used_streams = h2_used_streams,
Willy Tarreau62f52692017-10-08 23:01:42 +02006786 .shutr = h2_shutr,
6787 .shutw = h2_shutw,
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02006788 .ctl = h2_ctl,
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006789 .show_fd = h2_show_fd,
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006790 .takeover = h2_takeover,
Christopher Fauleta4600572021-03-08 15:28:28 +01006791 .flags = MX_FL_CLEAN_ABRT|MX_FL_HTX|MX_FL_HOL_RISK|MX_FL_NO_UPG,
Willy Tarreau62f52692017-10-08 23:01:42 +02006792 .name = "H2",
6793};
6794
Christopher Faulet32f61c02018-04-10 14:33:41 +02006795static struct mux_proto_list mux_proto_h2 =
Christopher Fauletc985f6c2019-07-15 11:42:52 +02006796 { .token = IST("h2"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BOTH, .mux = &h2_ops };
Willy Tarreau62f52692017-10-08 23:01:42 +02006797
Willy Tarreau0108d902018-11-25 19:14:37 +01006798INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2);
6799
Willy Tarreau62f52692017-10-08 23:01:42 +02006800/* config keyword parsers */
6801static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006802 { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size },
Willy Tarreaue6baec02017-07-27 11:45:11 +02006803 { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size },
Willy Tarreau5242ef82017-07-27 11:47:28 +02006804 { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006805 { CFG_GLOBAL, "tune.h2.max-frame-size", h2_parse_max_frame_size },
Willy Tarreau62f52692017-10-08 23:01:42 +02006806 { 0, NULL, NULL }
6807}};
6808
Willy Tarreau0108d902018-11-25 19:14:37 +01006809INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
Willy Tarreau2bdcc702020-05-19 11:31:11 +02006810
6811/* initialize internal structs after the config is parsed.
6812 * Returns zero on success, non-zero on error.
6813 */
6814static int init_h2()
6815{
6816 pool_head_hpack_tbl = create_pool("hpack_tbl",
6817 h2_settings_header_table_size,
6818 MEM_F_SHARED|MEM_F_EXACT);
Christopher Faulet52140992020-11-06 15:23:39 +01006819 if (!pool_head_hpack_tbl) {
6820 ha_alert("failed to allocate hpack_tbl memory pool\n");
6821 return (ERR_ALERT | ERR_FATAL);
6822 }
6823 return ERR_NONE;
Willy Tarreau2bdcc702020-05-19 11:31:11 +02006824}
6825
6826REGISTER_POST_CHECK(init_h2);