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Willy Tarreau62f52692017-10-08 23:01:42 +02001/*
2 * HTTP/2 mux-demux for connections
3 *
4 * Copyright 2017 Willy Tarreau <w@1wt.eu>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
Willy Tarreaudfd3de82020-06-04 23:46:14 +020013#include <import/eb32tree.h>
Willy Tarreau4c7e4b72020-05-27 12:58:42 +020014#include <haproxy/api.h>
Willy Tarreau6be78492020-06-05 00:00:29 +020015#include <haproxy/cfgparse.h>
Willy Tarreau7ea393d2020-06-04 18:02:10 +020016#include <haproxy/connection.h>
Willy Tarreaubf073142020-06-03 12:04:01 +020017#include <haproxy/h2.h>
Willy Tarreaube327fa2020-06-03 09:09:57 +020018#include <haproxy/hpack-dec.h>
19#include <haproxy/hpack-enc.h>
20#include <haproxy/hpack-tbl.h>
Willy Tarreau87735332020-06-04 09:08:41 +020021#include <haproxy/http_htx.h>
Willy Tarreau16f958c2020-06-03 08:44:35 +020022#include <haproxy/htx.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020023#include <haproxy/istbuf.h>
Willy Tarreau36979d92020-06-05 17:27:29 +020024#include <haproxy/log.h>
Willy Tarreau6131d6a2020-06-02 16:48:09 +020025#include <haproxy/net_helper.h>
Willy Tarreau48d25b32020-06-04 18:58:52 +020026#include <haproxy/session-t.h>
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +010027#include <haproxy/stats.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020028#include <haproxy/stream.h>
Willy Tarreau5e539c92020-06-04 20:45:39 +020029#include <haproxy/stream_interface.h>
Willy Tarreauc6d61d72020-06-04 19:02:42 +020030#include <haproxy/trace.h>
Willy Tarreau62f52692017-10-08 23:01:42 +020031
32
Willy Tarreauecb9dcd2019-01-03 12:00:17 +010033/* dummy streams returned for closed, error, refused, idle and states */
Willy Tarreau2a856182017-05-16 15:20:39 +020034static const struct h2s *h2_closed_stream;
Willy Tarreauecb9dcd2019-01-03 12:00:17 +010035static const struct h2s *h2_error_stream;
Willy Tarreau8d0d58b2018-12-23 18:29:12 +010036static const struct h2s *h2_refused_stream;
Willy Tarreau2a856182017-05-16 15:20:39 +020037static const struct h2s *h2_idle_stream;
38
Willy Tarreau5ab6b572017-09-22 08:05:00 +020039/* Connection flags (32 bit), in h2c->flags */
40#define H2_CF_NONE 0x00000000
41
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020042/* Flags indicating why writing to the mux is blocked. */
43#define H2_CF_MUX_MALLOC 0x00000001 // mux blocked on lack of connection's mux buffer
44#define H2_CF_MUX_MFULL 0x00000002 // mux blocked on connection's mux buffer full
45#define H2_CF_MUX_BLOCK_ANY 0x00000003 // aggregate of the mux flags above
46
Willy Tarreau315d8072017-12-10 22:17:57 +010047/* Flags indicating why writing to the demux is blocked.
48 * The first two ones directly affect the ability for the mux to receive data
49 * from the connection. The other ones affect the mux's ability to demux
50 * received data.
51 */
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020052#define H2_CF_DEM_DALLOC 0x00000004 // demux blocked on lack of connection's demux buffer
53#define H2_CF_DEM_DFULL 0x00000008 // demux blocked on connection's demux buffer full
Willy Tarreau315d8072017-12-10 22:17:57 +010054
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020055#define H2_CF_DEM_MBUSY 0x00000010 // demux blocked on connection's mux side busy
56#define H2_CF_DEM_MROOM 0x00000020 // demux blocked on lack of room in mux buffer
57#define H2_CF_DEM_SALLOC 0x00000040 // demux blocked on lack of stream's request buffer
58#define H2_CF_DEM_SFULL 0x00000080 // demux blocked on stream request buffer full
Willy Tarreauf2101912018-07-19 10:11:38 +020059#define H2_CF_DEM_TOOMANY 0x00000100 // demux blocked waiting for some conn_streams to leave
60#define H2_CF_DEM_BLOCK_ANY 0x000001F0 // aggregate of the demux flags above except DALLOC/DFULL
Christopher Fauleta9cc1e82021-07-26 12:06:53 +020061 // (SHORT_READ is also excluded)
62
Christopher Faulet484f10a2021-11-10 17:50:10 +010063#define H2_CF_DEM_SHORT_READ 0x00000200 // demux blocked on incomplete frame
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020064
Willy Tarreau081d4722017-05-16 21:51:05 +020065/* other flags */
Willy Tarreauf2101912018-07-19 10:11:38 +020066#define H2_CF_GOAWAY_SENT 0x00001000 // a GOAWAY frame was successfully sent
67#define H2_CF_GOAWAY_FAILED 0x00002000 // a GOAWAY frame failed to be sent
68#define H2_CF_WAIT_FOR_HS 0x00004000 // We did check that at least a stream was waiting for handshake
Willy Tarreaub3fb56d2018-10-03 13:56:38 +020069#define H2_CF_IS_BACK 0x00008000 // this is an outgoing connection
Willy Tarreau3d4631f2021-01-20 10:53:13 +010070#define H2_CF_WINDOW_OPENED 0x00010000 // demux increased window already advertised
71#define H2_CF_RCVD_SHUT 0x00020000 // a recv() attempt already failed on a shutdown
72#define H2_CF_END_REACHED 0x00040000 // pending data too short with RCVD_SHUT present
Willy Tarreau081d4722017-05-16 21:51:05 +020073
Amaury Denoyelle68993a12021-10-18 09:43:29 +020074#define H2_CF_RCVD_RFC8441 0x00100000 // settings from RFC8441 has been received indicating support for Extended CONNECT
Willy Tarreau8a4dca02022-01-13 16:00:12 +010075#define H2_CF_SHTS_UPDATED 0x00200000 // SETTINGS_HEADER_TABLE_SIZE updated
76#define H2_CF_DTSU_EMITTED 0x00400000 // HPACK Dynamic Table Size Update opcode emitted
Amaury Denoyelle68993a12021-10-18 09:43:29 +020077
Willy Tarreau5ab6b572017-09-22 08:05:00 +020078/* H2 connection state, in h2c->st0 */
79enum h2_cs {
80 H2_CS_PREFACE, // init done, waiting for connection preface
81 H2_CS_SETTINGS1, // preface OK, waiting for first settings frame
82 H2_CS_FRAME_H, // first settings frame ok, waiting for frame header
83 H2_CS_FRAME_P, // frame header OK, waiting for frame payload
Willy Tarreaua20a5192017-12-27 11:02:06 +010084 H2_CS_FRAME_A, // frame payload OK, trying to send ACK frame
85 H2_CS_FRAME_E, // frame payload OK, trying to send RST frame
Willy Tarreau5ab6b572017-09-22 08:05:00 +020086 H2_CS_ERROR, // send GOAWAY(errcode) and close the connection ASAP
87 H2_CS_ERROR2, // GOAWAY(errcode) sent, close the connection ASAP
88 H2_CS_ENTRIES // must be last
89} __attribute__((packed));
90
Willy Tarreau51330962019-05-26 09:38:07 +020091
Willy Tarreau9c218e72019-05-26 10:08:28 +020092/* 32 buffers: one for the ring's root, rest for the mbuf itself */
93#define H2C_MBUF_CNT 32
Willy Tarreau51330962019-05-26 09:38:07 +020094
Willy Tarreau5ab6b572017-09-22 08:05:00 +020095/* H2 connection descriptor */
96struct h2c {
97 struct connection *conn;
98
99 enum h2_cs st0; /* mux state */
100 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
101
102 /* 16 bit hole here */
103 uint32_t flags; /* connection flags: H2_CF_* */
Willy Tarreau2e2083a2019-01-31 10:34:07 +0100104 uint32_t streams_limit; /* maximum number of concurrent streams the peer supports */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200105 int32_t max_id; /* highest ID known on this connection, <0 before preface */
106 uint32_t rcvd_c; /* newly received data to ACK for the connection */
Willy Tarreau1d7138e2022-06-08 16:32:22 +0200107 uint32_t rcvd_s; /* newly received data to ACK for the current stream (dsi) or zero */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200108
109 /* states for the demux direction */
110 struct hpack_dht *ddht; /* demux dynamic header table */
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200111 struct buffer dbuf; /* demux buffer */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200112
113 int32_t dsi; /* demux stream ID (<0 = idle) */
114 int32_t dfl; /* demux frame length (if dsi >= 0) */
115 int8_t dft; /* demux frame type (if dsi >= 0) */
116 int8_t dff; /* demux frame flags (if dsi >= 0) */
Willy Tarreau05e5daf2017-12-11 15:17:36 +0100117 uint8_t dpl; /* demux pad length (part of dfl), init to 0 */
118 /* 8 bit hole here */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200119 int32_t last_sid; /* last processed stream ID for GOAWAY, <0 before preface */
120
121 /* states for the mux direction */
Willy Tarreau51330962019-05-26 09:38:07 +0200122 struct buffer mbuf[H2C_MBUF_CNT]; /* mux buffers (ring) */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200123 int32_t msi; /* mux stream ID (<0 = idle) */
124 int32_t mfl; /* mux frame length (if dsi >= 0) */
125 int8_t mft; /* mux frame type (if dsi >= 0) */
126 int8_t mff; /* mux frame flags (if dsi >= 0) */
127 /* 16 bit hole here */
128 int32_t miw; /* mux initial window size for all new streams */
129 int32_t mws; /* mux window size. Can be negative. */
130 int32_t mfs; /* mux's max frame size */
131
Willy Tarreauea392822017-10-31 10:02:25 +0100132 int timeout; /* idle timeout duration in ticks */
Willy Tarreau599391a2017-11-24 10:16:00 +0100133 int shut_timeout; /* idle timeout duration in ticks after GOAWAY was sent */
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +0100134 int idle_start; /* date of the last time the connection went idle */
135 /* 32-bit hole here */
Willy Tarreau49745612017-12-03 18:56:02 +0100136 unsigned int nb_streams; /* number of streams in the tree */
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200137 unsigned int nb_cs; /* number of attached conn_streams */
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100138 unsigned int nb_reserved; /* number of reserved streams */
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100139 unsigned int stream_cnt; /* total number of streams seen */
Willy Tarreau0b37d652018-10-03 10:33:02 +0200140 struct proxy *proxy; /* the proxy this connection was created for */
Willy Tarreauea392822017-10-31 10:02:25 +0100141 struct task *task; /* timeout management task */
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100142 struct h2_counters *px_counters; /* h2 counters attached to proxy */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200143 struct eb_root streams_by_id; /* all active streams by their ID */
144 struct list send_list; /* list of blocked streams requesting to send */
145 struct list fctl_list; /* list of streams blocked by connection's fctl */
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200146 struct list blocked_list; /* list of streams blocked for other reasons (e.g. sfctl, dep) */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100147 struct buffer_wait buf_wait; /* wait list for buffer allocations */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200148 struct wait_event wait_event; /* To be used if we're waiting for I/Os */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200149};
150
Willy Tarreau18312642017-10-11 07:57:07 +0200151/* H2 stream state, in h2s->st */
152enum h2_ss {
153 H2_SS_IDLE = 0, // idle
154 H2_SS_RLOC, // reserved(local)
155 H2_SS_RREM, // reserved(remote)
156 H2_SS_OPEN, // open
157 H2_SS_HREM, // half-closed(remote)
158 H2_SS_HLOC, // half-closed(local)
Willy Tarreau96060ba2017-10-16 18:34:34 +0200159 H2_SS_ERROR, // an error needs to be sent using RST_STREAM
Willy Tarreau18312642017-10-11 07:57:07 +0200160 H2_SS_CLOSED, // closed
161 H2_SS_ENTRIES // must be last
162} __attribute__((packed));
163
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200164#define H2_SS_MASK(state) (1UL << (state))
165#define H2_SS_IDLE_BIT (1UL << H2_SS_IDLE)
166#define H2_SS_RLOC_BIT (1UL << H2_SS_RLOC)
167#define H2_SS_RREM_BIT (1UL << H2_SS_RREM)
168#define H2_SS_OPEN_BIT (1UL << H2_SS_OPEN)
169#define H2_SS_HREM_BIT (1UL << H2_SS_HREM)
170#define H2_SS_HLOC_BIT (1UL << H2_SS_HLOC)
171#define H2_SS_ERROR_BIT (1UL << H2_SS_ERROR)
172#define H2_SS_CLOSED_BIT (1UL << H2_SS_CLOSED)
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200173
Willy Tarreau18312642017-10-11 07:57:07 +0200174/* HTTP/2 stream flags (32 bit), in h2s->flags */
175#define H2_SF_NONE 0x00000000
176#define H2_SF_ES_RCVD 0x00000001
177#define H2_SF_ES_SENT 0x00000002
178
179#define H2_SF_RST_RCVD 0x00000004 // received RST_STREAM
180#define H2_SF_RST_SENT 0x00000008 // sent RST_STREAM
181
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200182/* stream flags indicating the reason the stream is blocked */
183#define H2_SF_BLK_MBUSY 0x00000010 // blocked waiting for mux access (transient)
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200184#define H2_SF_BLK_MROOM 0x00000020 // blocked waiting for room in the mux (must be in send list)
185#define H2_SF_BLK_MFCTL 0x00000040 // blocked due to mux fctl (must be in fctl list)
186#define H2_SF_BLK_SFCTL 0x00000080 // blocked due to stream fctl (must be in blocked list)
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200187#define H2_SF_BLK_ANY 0x000000F0 // any of the reasons above
188
Willy Tarreau454f9052017-10-26 19:40:35 +0200189/* stream flags indicating how data is supposed to be sent */
190#define H2_SF_DATA_CLEN 0x00000100 // data sent using content-length
Christopher Faulet7d247f02020-12-02 14:26:36 +0100191#define H2_SF_BODYLESS_RESP 0x00000200 /* Bodyless response message */
Christopher Fauletd0db4232021-01-22 11:46:30 +0100192#define H2_SF_BODY_TUNNEL 0x00000400 // Attempt to establish a Tunnelled stream (the result depends on the status code)
193
Willy Tarreau454f9052017-10-26 19:40:35 +0200194
Willy Tarreaud9464162020-01-10 18:25:07 +0100195#define H2_SF_NOTIFIED 0x00000800 // a paused stream was notified to try to send again
Willy Tarreau67434202017-11-06 20:20:51 +0100196#define H2_SF_HEADERS_SENT 0x00001000 // a HEADERS frame was sent for this stream
Willy Tarreauc4312d32017-11-07 12:01:53 +0100197#define H2_SF_OUTGOING_DATA 0x00002000 // set whenever we've seen outgoing data
Willy Tarreau67434202017-11-06 20:20:51 +0100198
Willy Tarreau6cc85a52019-01-02 15:49:20 +0100199#define H2_SF_HEADERS_RCVD 0x00004000 // a HEADERS frame was received for this stream
200
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200201#define H2_SF_WANT_SHUTR 0x00008000 // a stream couldn't shutr() (mux full/busy)
202#define H2_SF_WANT_SHUTW 0x00010000 // a stream couldn't shutw() (mux full/busy)
Willy Tarreau3cf69fe2019-05-14 10:44:40 +0200203#define H2_SF_KILL_CONN 0x00020000 // kill the whole connection with this stream
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200204
Amaury Denoyelle5fb48ea2020-12-11 17:53:04 +0100205#define H2_SF_EXT_CONNECT_SENT 0x00040000 // rfc 8441 an Extended CONNECT has been sent
Amaury Denoyelleefe22762020-12-11 17:53:08 +0100206#define H2_SF_EXT_CONNECT_RCVD 0x00080000 // rfc 8441 an Extended CONNECT has been received and parsed
Christopher Fauletd0db4232021-01-22 11:46:30 +0100207
Amaury Denoyelle5fb48ea2020-12-11 17:53:04 +0100208#define H2_SF_TUNNEL_ABRT 0x00100000 // A tunnel attempt was aborted
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200209
Willy Tarreau18312642017-10-11 07:57:07 +0200210/* H2 stream descriptor, describing the stream as it appears in the H2C, and as
Christopher Fauletfafd1b02020-11-03 18:25:52 +0100211 * it is being processed in the internal HTTP representation (HTX).
Willy Tarreau18312642017-10-11 07:57:07 +0200212 */
213struct h2s {
214 struct conn_stream *cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +0100215 struct session *sess;
Willy Tarreau18312642017-10-11 07:57:07 +0200216 struct h2c *h2c;
Willy Tarreau18312642017-10-11 07:57:07 +0200217 struct eb32_node by_id; /* place in h2c's streams_by_id */
Willy Tarreau18312642017-10-11 07:57:07 +0200218 int32_t id; /* stream ID */
219 uint32_t flags; /* H2_SF_* */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +0200220 int sws; /* stream window size, to be added to the mux's initial window size */
Willy Tarreau18312642017-10-11 07:57:07 +0200221 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
222 enum h2_ss st;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +0200223 uint16_t status; /* HTTP response status */
Willy Tarreau1915ca22019-01-24 11:49:37 +0100224 unsigned long long body_len; /* remaining body length according to content-length if H2_SF_DATA_CLEN */
Olivier Houchard638b7992018-08-16 15:41:52 +0200225 struct buffer rxbuf; /* receive buffer, always valid (buf_empty or real buffer) */
Willy Tarreauf96508a2020-01-10 11:12:48 +0100226 struct wait_event *subs; /* recv wait_event the conn_stream associated is waiting on (via h2_subscribe) */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200227 struct list list; /* To be used when adding in h2c->send_list or h2c->fctl_lsit */
Willy Tarreau5723f292020-01-10 15:16:57 +0100228 struct tasklet *shut_tl; /* deferred shutdown tasklet, to retry to send an RST after we failed to,
229 * in case there's no other subscription to do it */
Amaury Denoyelle74162742020-12-11 17:53:05 +0100230
231 char upgrade_protocol[16]; /* rfc 8441: requested protocol on Extended CONNECT */
Willy Tarreau18312642017-10-11 07:57:07 +0200232};
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200233
Willy Tarreauc6405142017-09-21 20:23:50 +0200234/* descriptor for an h2 frame header */
235struct h2_fh {
236 uint32_t len; /* length, host order, 24 bits */
237 uint32_t sid; /* stream id, host order, 31 bits */
238 uint8_t ft; /* frame type */
239 uint8_t ff; /* frame flags */
240};
241
Willy Tarreau12ae2122019-08-08 18:23:12 +0200242/* trace source and events */
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200243static void h2_trace(enum trace_level level, uint64_t mask, \
244 const struct trace_source *src,
245 const struct ist where, const struct ist func,
246 const void *a1, const void *a2, const void *a3, const void *a4);
Willy Tarreau12ae2122019-08-08 18:23:12 +0200247
248/* The event representation is split like this :
249 * strm - application layer
250 * h2s - internal H2 stream
251 * h2c - internal H2 connection
252 * conn - external connection
253 *
254 */
255static const struct trace_event h2_trace_events[] = {
256#define H2_EV_H2C_NEW (1ULL << 0)
Willy Tarreau87951942019-08-30 07:34:36 +0200257 { .mask = H2_EV_H2C_NEW, .name = "h2c_new", .desc = "new H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200258#define H2_EV_H2C_RECV (1ULL << 1)
Willy Tarreau87951942019-08-30 07:34:36 +0200259 { .mask = H2_EV_H2C_RECV, .name = "h2c_recv", .desc = "Rx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200260#define H2_EV_H2C_SEND (1ULL << 2)
Willy Tarreau87951942019-08-30 07:34:36 +0200261 { .mask = H2_EV_H2C_SEND, .name = "h2c_send", .desc = "Tx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200262#define H2_EV_H2C_FCTL (1ULL << 3)
Willy Tarreau87951942019-08-30 07:34:36 +0200263 { .mask = H2_EV_H2C_FCTL, .name = "h2c_fctl", .desc = "H2 connection flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200264#define H2_EV_H2C_BLK (1ULL << 4)
Willy Tarreau87951942019-08-30 07:34:36 +0200265 { .mask = H2_EV_H2C_BLK, .name = "h2c_blk", .desc = "H2 connection blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200266#define H2_EV_H2C_WAKE (1ULL << 5)
Willy Tarreau87951942019-08-30 07:34:36 +0200267 { .mask = H2_EV_H2C_WAKE, .name = "h2c_wake", .desc = "H2 connection woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200268#define H2_EV_H2C_END (1ULL << 6)
Willy Tarreau87951942019-08-30 07:34:36 +0200269 { .mask = H2_EV_H2C_END, .name = "h2c_end", .desc = "H2 connection terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200270#define H2_EV_H2C_ERR (1ULL << 7)
Willy Tarreau87951942019-08-30 07:34:36 +0200271 { .mask = H2_EV_H2C_ERR, .name = "h2c_err", .desc = "error on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200272#define H2_EV_RX_FHDR (1ULL << 8)
Willy Tarreau87951942019-08-30 07:34:36 +0200273 { .mask = H2_EV_RX_FHDR, .name = "rx_fhdr", .desc = "H2 frame header received" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200274#define H2_EV_RX_FRAME (1ULL << 9)
Willy Tarreau87951942019-08-30 07:34:36 +0200275 { .mask = H2_EV_RX_FRAME, .name = "rx_frame", .desc = "receipt of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200276#define H2_EV_RX_EOI (1ULL << 10)
Willy Tarreau87951942019-08-30 07:34:36 +0200277 { .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 +0200278#define H2_EV_RX_PREFACE (1ULL << 11)
Willy Tarreau87951942019-08-30 07:34:36 +0200279 { .mask = H2_EV_RX_PREFACE, .name = "rx_preface", .desc = "receipt of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200280#define H2_EV_RX_DATA (1ULL << 12)
Willy Tarreau87951942019-08-30 07:34:36 +0200281 { .mask = H2_EV_RX_DATA, .name = "rx_data", .desc = "receipt of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200282#define H2_EV_RX_HDR (1ULL << 13)
Willy Tarreau87951942019-08-30 07:34:36 +0200283 { .mask = H2_EV_RX_HDR, .name = "rx_hdr", .desc = "receipt of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200284#define H2_EV_RX_PRIO (1ULL << 14)
Willy Tarreau87951942019-08-30 07:34:36 +0200285 { .mask = H2_EV_RX_PRIO, .name = "rx_prio", .desc = "receipt of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200286#define H2_EV_RX_RST (1ULL << 15)
Willy Tarreau87951942019-08-30 07:34:36 +0200287 { .mask = H2_EV_RX_RST, .name = "rx_rst", .desc = "receipt of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200288#define H2_EV_RX_SETTINGS (1ULL << 16)
Willy Tarreau87951942019-08-30 07:34:36 +0200289 { .mask = H2_EV_RX_SETTINGS, .name = "rx_settings", .desc = "receipt of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200290#define H2_EV_RX_PUSH (1ULL << 17)
Willy Tarreau87951942019-08-30 07:34:36 +0200291 { .mask = H2_EV_RX_PUSH, .name = "rx_push", .desc = "receipt of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200292#define H2_EV_RX_PING (1ULL << 18)
Willy Tarreau87951942019-08-30 07:34:36 +0200293 { .mask = H2_EV_RX_PING, .name = "rx_ping", .desc = "receipt of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200294#define H2_EV_RX_GOAWAY (1ULL << 19)
Willy Tarreau87951942019-08-30 07:34:36 +0200295 { .mask = H2_EV_RX_GOAWAY, .name = "rx_goaway", .desc = "receipt of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200296#define H2_EV_RX_WU (1ULL << 20)
Willy Tarreau87951942019-08-30 07:34:36 +0200297 { .mask = H2_EV_RX_WU, .name = "rx_wu", .desc = "receipt of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200298#define H2_EV_RX_CONT (1ULL << 21)
Willy Tarreau87951942019-08-30 07:34:36 +0200299 { .mask = H2_EV_RX_CONT, .name = "rx_cont", .desc = "receipt of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200300#define H2_EV_TX_FRAME (1ULL << 22)
Willy Tarreau87951942019-08-30 07:34:36 +0200301 { .mask = H2_EV_TX_FRAME, .name = "tx_frame", .desc = "transmission of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200302#define H2_EV_TX_EOI (1ULL << 23)
Willy Tarreau87951942019-08-30 07:34:36 +0200303 { .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 +0200304#define H2_EV_TX_PREFACE (1ULL << 24)
Willy Tarreau87951942019-08-30 07:34:36 +0200305 { .mask = H2_EV_TX_PREFACE, .name = "tx_preface", .desc = "transmission of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200306#define H2_EV_TX_DATA (1ULL << 25)
Willy Tarreau87951942019-08-30 07:34:36 +0200307 { .mask = H2_EV_TX_DATA, .name = "tx_data", .desc = "transmission of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200308#define H2_EV_TX_HDR (1ULL << 26)
Willy Tarreau87951942019-08-30 07:34:36 +0200309 { .mask = H2_EV_TX_HDR, .name = "tx_hdr", .desc = "transmission of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200310#define H2_EV_TX_PRIO (1ULL << 27)
Willy Tarreau87951942019-08-30 07:34:36 +0200311 { .mask = H2_EV_TX_PRIO, .name = "tx_prio", .desc = "transmission of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200312#define H2_EV_TX_RST (1ULL << 28)
Willy Tarreau87951942019-08-30 07:34:36 +0200313 { .mask = H2_EV_TX_RST, .name = "tx_rst", .desc = "transmission of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200314#define H2_EV_TX_SETTINGS (1ULL << 29)
Willy Tarreau87951942019-08-30 07:34:36 +0200315 { .mask = H2_EV_TX_SETTINGS, .name = "tx_settings", .desc = "transmission of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200316#define H2_EV_TX_PUSH (1ULL << 30)
Willy Tarreau87951942019-08-30 07:34:36 +0200317 { .mask = H2_EV_TX_PUSH, .name = "tx_push", .desc = "transmission of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200318#define H2_EV_TX_PING (1ULL << 31)
Willy Tarreau87951942019-08-30 07:34:36 +0200319 { .mask = H2_EV_TX_PING, .name = "tx_ping", .desc = "transmission of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200320#define H2_EV_TX_GOAWAY (1ULL << 32)
Willy Tarreau87951942019-08-30 07:34:36 +0200321 { .mask = H2_EV_TX_GOAWAY, .name = "tx_goaway", .desc = "transmission of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200322#define H2_EV_TX_WU (1ULL << 33)
Willy Tarreau87951942019-08-30 07:34:36 +0200323 { .mask = H2_EV_TX_WU, .name = "tx_wu", .desc = "transmission of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200324#define H2_EV_TX_CONT (1ULL << 34)
Willy Tarreau87951942019-08-30 07:34:36 +0200325 { .mask = H2_EV_TX_CONT, .name = "tx_cont", .desc = "transmission of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200326#define H2_EV_H2S_NEW (1ULL << 35)
Willy Tarreau87951942019-08-30 07:34:36 +0200327 { .mask = H2_EV_H2S_NEW, .name = "h2s_new", .desc = "new H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200328#define H2_EV_H2S_RECV (1ULL << 36)
Willy Tarreau87951942019-08-30 07:34:36 +0200329 { .mask = H2_EV_H2S_RECV, .name = "h2s_recv", .desc = "Rx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200330#define H2_EV_H2S_SEND (1ULL << 37)
Willy Tarreau87951942019-08-30 07:34:36 +0200331 { .mask = H2_EV_H2S_SEND, .name = "h2s_send", .desc = "Tx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200332#define H2_EV_H2S_FCTL (1ULL << 38)
Willy Tarreau87951942019-08-30 07:34:36 +0200333 { .mask = H2_EV_H2S_FCTL, .name = "h2s_fctl", .desc = "H2 stream flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200334#define H2_EV_H2S_BLK (1ULL << 39)
Willy Tarreau87951942019-08-30 07:34:36 +0200335 { .mask = H2_EV_H2S_BLK, .name = "h2s_blk", .desc = "H2 stream blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200336#define H2_EV_H2S_WAKE (1ULL << 40)
Willy Tarreau87951942019-08-30 07:34:36 +0200337 { .mask = H2_EV_H2S_WAKE, .name = "h2s_wake", .desc = "H2 stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200338#define H2_EV_H2S_END (1ULL << 41)
Willy Tarreau87951942019-08-30 07:34:36 +0200339 { .mask = H2_EV_H2S_END, .name = "h2s_end", .desc = "H2 stream terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200340#define H2_EV_H2S_ERR (1ULL << 42)
Willy Tarreau87951942019-08-30 07:34:36 +0200341 { .mask = H2_EV_H2S_ERR, .name = "h2s_err", .desc = "error on H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200342#define H2_EV_STRM_NEW (1ULL << 43)
Willy Tarreau87951942019-08-30 07:34:36 +0200343 { .mask = H2_EV_STRM_NEW, .name = "strm_new", .desc = "app-layer stream creation" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200344#define H2_EV_STRM_RECV (1ULL << 44)
Willy Tarreau87951942019-08-30 07:34:36 +0200345 { .mask = H2_EV_STRM_RECV, .name = "strm_recv", .desc = "receiving data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200346#define H2_EV_STRM_SEND (1ULL << 45)
Willy Tarreau87951942019-08-30 07:34:36 +0200347 { .mask = H2_EV_STRM_SEND, .name = "strm_send", .desc = "sending data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200348#define H2_EV_STRM_FULL (1ULL << 46)
Willy Tarreau87951942019-08-30 07:34:36 +0200349 { .mask = H2_EV_STRM_FULL, .name = "strm_full", .desc = "stream buffer full" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200350#define H2_EV_STRM_WAKE (1ULL << 47)
Willy Tarreau87951942019-08-30 07:34:36 +0200351 { .mask = H2_EV_STRM_WAKE, .name = "strm_wake", .desc = "stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200352#define H2_EV_STRM_SHUT (1ULL << 48)
Willy Tarreau87951942019-08-30 07:34:36 +0200353 { .mask = H2_EV_STRM_SHUT, .name = "strm_shut", .desc = "stream shutdown" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200354#define H2_EV_STRM_END (1ULL << 49)
Willy Tarreau87951942019-08-30 07:34:36 +0200355 { .mask = H2_EV_STRM_END, .name = "strm_end", .desc = "detaching app-layer stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200356#define H2_EV_STRM_ERR (1ULL << 50)
Willy Tarreau87951942019-08-30 07:34:36 +0200357 { .mask = H2_EV_STRM_ERR, .name = "strm_err", .desc = "stream error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200358#define H2_EV_PROTO_ERR (1ULL << 51)
Willy Tarreau87951942019-08-30 07:34:36 +0200359 { .mask = H2_EV_PROTO_ERR, .name = "proto_err", .desc = "protocol error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200360 { }
361};
362
363static const struct name_desc h2_trace_lockon_args[4] = {
364 /* arg1 */ { /* already used by the connection */ },
365 /* arg2 */ { .name="h2s", .desc="H2 stream" },
366 /* arg3 */ { },
367 /* arg4 */ { }
368};
369
370static const struct name_desc h2_trace_decoding[] = {
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200371#define H2_VERB_CLEAN 1
372 { .name="clean", .desc="only user-friendly stuff, generally suitable for level \"user\"" },
373#define H2_VERB_MINIMAL 2
Willy Tarreau12ae2122019-08-08 18:23:12 +0200374 { .name="minimal", .desc="report only h2c/h2s state and flags, no real decoding" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200375#define H2_VERB_SIMPLE 3
Willy Tarreau12ae2122019-08-08 18:23:12 +0200376 { .name="simple", .desc="add request/response status line or frame info when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200377#define H2_VERB_ADVANCED 4
Willy Tarreau12ae2122019-08-08 18:23:12 +0200378 { .name="advanced", .desc="add header fields or frame decoding when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200379#define H2_VERB_COMPLETE 5
Willy Tarreau12ae2122019-08-08 18:23:12 +0200380 { .name="complete", .desc="add full data dump when available" },
381 { /* end */ }
382};
383
Willy Tarreau6eb3d372021-04-10 19:29:26 +0200384static struct trace_source trace_h2 __read_mostly = {
Willy Tarreau12ae2122019-08-08 18:23:12 +0200385 .name = IST("h2"),
386 .desc = "HTTP/2 multiplexer",
387 .arg_def = TRC_ARG1_CONN, // TRACE()'s first argument is always a connection
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200388 .default_cb = h2_trace,
Willy Tarreau12ae2122019-08-08 18:23:12 +0200389 .known_events = h2_trace_events,
390 .lockon_args = h2_trace_lockon_args,
391 .decoding = h2_trace_decoding,
392 .report_events = ~0, // report everything by default
393};
394
395#define TRACE_SOURCE &trace_h2
396INITCALL1(STG_REGISTER, trace_register_source, TRACE_SOURCE);
397
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100398/* h2 stats module */
399enum {
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100400 H2_ST_HEADERS_RCVD,
401 H2_ST_DATA_RCVD,
402 H2_ST_SETTINGS_RCVD,
403 H2_ST_RST_STREAM_RCVD,
404 H2_ST_GOAWAY_RCVD,
405
Amaury Denoyellea8879232020-10-27 17:16:03 +0100406 H2_ST_CONN_PROTO_ERR,
407 H2_ST_STRM_PROTO_ERR,
408 H2_ST_RST_STREAM_RESP,
409 H2_ST_GOAWAY_RESP,
410
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100411 H2_ST_OPEN_CONN,
412 H2_ST_OPEN_STREAM,
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100413 H2_ST_TOTAL_CONN,
414 H2_ST_TOTAL_STREAM,
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100415
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100416 H2_STATS_COUNT /* must be the last member of the enum */
417};
418
419static struct name_desc h2_stats[] = {
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100420 [H2_ST_HEADERS_RCVD] = { .name = "h2_headers_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100421 .desc = "Total number of received HEADERS frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100422 [H2_ST_DATA_RCVD] = { .name = "h2_data_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100423 .desc = "Total number of received DATA frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100424 [H2_ST_SETTINGS_RCVD] = { .name = "h2_settings_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100425 .desc = "Total number of received SETTINGS frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100426 [H2_ST_RST_STREAM_RCVD] = { .name = "h2_rst_stream_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100427 .desc = "Total number of received RST_STREAM frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100428 [H2_ST_GOAWAY_RCVD] = { .name = "h2_goaway_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100429 .desc = "Total number of received GOAWAY frames" },
Amaury Denoyellea8879232020-10-27 17:16:03 +0100430
431 [H2_ST_CONN_PROTO_ERR] = { .name = "h2_detected_conn_protocol_errors",
432 .desc = "Total number of connection protocol errors" },
433 [H2_ST_STRM_PROTO_ERR] = { .name = "h2_detected_strm_protocol_errors",
434 .desc = "Total number of stream protocol errors" },
435 [H2_ST_RST_STREAM_RESP] = { .name = "h2_rst_stream_resp",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100436 .desc = "Total number of RST_STREAM sent on detected error" },
Amaury Denoyellea8879232020-10-27 17:16:03 +0100437 [H2_ST_GOAWAY_RESP] = { .name = "h2_goaway_resp",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100438 .desc = "Total number of GOAWAY sent on detected error" },
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100439
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100440 [H2_ST_OPEN_CONN] = { .name = "h2_open_connections",
441 .desc = "Count of currently open connections" },
442 [H2_ST_OPEN_STREAM] = { .name = "h2_backend_open_streams",
443 .desc = "Count of currently open streams" },
Amaury Denoyelle377d8782021-02-03 16:27:22 +0100444 [H2_ST_TOTAL_CONN] = { .name = "h2_total_connections",
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100445 .desc = "Total number of connections" },
Amaury Denoyelle377d8782021-02-03 16:27:22 +0100446 [H2_ST_TOTAL_STREAM] = { .name = "h2_backend_total_streams",
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100447 .desc = "Total number of streams" },
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100448};
449
450static struct h2_counters {
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100451 long long headers_rcvd; /* total number of HEADERS frame received */
452 long long data_rcvd; /* total number of DATA frame received */
453 long long settings_rcvd; /* total number of SETTINGS frame received */
454 long long rst_stream_rcvd; /* total number of RST_STREAM frame received */
455 long long goaway_rcvd; /* total number of GOAWAY frame received */
Amaury Denoyellea8879232020-10-27 17:16:03 +0100456
457 long long conn_proto_err; /* total number of protocol errors detected */
458 long long strm_proto_err; /* total number of protocol errors detected */
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100459 long long rst_stream_resp; /* total number of RST_STREAM frame sent on error */
460 long long goaway_resp; /* total number of GOAWAY frame sent on error */
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100461
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100462 long long open_conns; /* count of currently open connections */
463 long long open_streams; /* count of currently open streams */
464 long long total_conns; /* total number of connections */
465 long long total_streams; /* total number of streams */
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100466} h2_counters;
467
468static void h2_fill_stats(void *data, struct field *stats)
469{
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100470 struct h2_counters *counters = data;
471
472 stats[H2_ST_HEADERS_RCVD] = mkf_u64(FN_COUNTER, counters->headers_rcvd);
473 stats[H2_ST_DATA_RCVD] = mkf_u64(FN_COUNTER, counters->data_rcvd);
474 stats[H2_ST_SETTINGS_RCVD] = mkf_u64(FN_COUNTER, counters->settings_rcvd);
475 stats[H2_ST_RST_STREAM_RCVD] = mkf_u64(FN_COUNTER, counters->rst_stream_rcvd);
476 stats[H2_ST_GOAWAY_RCVD] = mkf_u64(FN_COUNTER, counters->goaway_rcvd);
Amaury Denoyellea8879232020-10-27 17:16:03 +0100477
478 stats[H2_ST_CONN_PROTO_ERR] = mkf_u64(FN_COUNTER, counters->conn_proto_err);
479 stats[H2_ST_STRM_PROTO_ERR] = mkf_u64(FN_COUNTER, counters->strm_proto_err);
480 stats[H2_ST_RST_STREAM_RESP] = mkf_u64(FN_COUNTER, counters->rst_stream_resp);
481 stats[H2_ST_GOAWAY_RESP] = mkf_u64(FN_COUNTER, counters->goaway_resp);
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100482
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100483 stats[H2_ST_OPEN_CONN] = mkf_u64(FN_GAUGE, counters->open_conns);
484 stats[H2_ST_OPEN_STREAM] = mkf_u64(FN_GAUGE, counters->open_streams);
485 stats[H2_ST_TOTAL_CONN] = mkf_u64(FN_COUNTER, counters->total_conns);
486 stats[H2_ST_TOTAL_STREAM] = mkf_u64(FN_COUNTER, counters->total_streams);
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100487}
488
489static struct stats_module h2_stats_module = {
490 .name = "h2",
491 .fill_stats = h2_fill_stats,
492 .stats = h2_stats,
493 .stats_count = H2_STATS_COUNT,
494 .counters = &h2_counters,
495 .counters_size = sizeof(h2_counters),
496 .domain_flags = MK_STATS_PROXY_DOMAIN(STATS_PX_CAP_FE|STATS_PX_CAP_BE),
497 .clearable = 1,
498};
499
500INITCALL1(STG_REGISTER, stats_register_module, &h2_stats_module);
501
Willy Tarreau8ceae722018-11-26 11:58:30 +0100502/* the h2c connection pool */
503DECLARE_STATIC_POOL(pool_head_h2c, "h2c", sizeof(struct h2c));
504
505/* the h2s stream pool */
506DECLARE_STATIC_POOL(pool_head_h2s, "h2s", sizeof(struct h2s));
507
Willy Tarreaudc572362018-12-12 08:08:05 +0100508/* The default connection window size is 65535, it may only be enlarged using
509 * a WINDOW_UPDATE message. Since the window must never be larger than 2G-1,
510 * we'll pretend we already received the difference between the two to send
511 * an equivalent window update to enlarge it to 2G-1.
512 */
513#define H2_INITIAL_WINDOW_INCREMENT ((1U<<31)-1 - 65535)
514
Willy Tarreau455d5682019-05-24 19:42:18 +0200515/* maximum amount of data we're OK with re-aligning for buffer optimizations */
516#define MAX_DATA_REALIGN 1024
517
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200518/* a few settings from the global section */
519static int h2_settings_header_table_size = 4096; /* initial value */
Willy Tarreaue6baec02017-07-27 11:45:11 +0200520static int h2_settings_initial_window_size = 65535; /* initial value */
Willy Tarreau5a490b62019-01-31 10:39:51 +0100521static unsigned int h2_settings_max_concurrent_streams = 100;
Willy Tarreaua24b35c2019-02-21 13:24:36 +0100522static int h2_settings_max_frame_size = 0; /* unset */
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200523
Willy Tarreau2a856182017-05-16 15:20:39 +0200524/* a dmumy closed stream */
525static const struct h2s *h2_closed_stream = &(const struct h2s){
526 .cs = NULL,
527 .h2c = NULL,
528 .st = H2_SS_CLOSED,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100529 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreauab837502017-12-27 15:07:30 +0100530 .flags = H2_SF_RST_RCVD,
Willy Tarreau2a856182017-05-16 15:20:39 +0200531 .id = 0,
532};
533
Willy Tarreauecb9dcd2019-01-03 12:00:17 +0100534/* a dmumy closed stream returning a PROTOCOL_ERROR error */
535static const struct h2s *h2_error_stream = &(const struct h2s){
536 .cs = NULL,
537 .h2c = NULL,
538 .st = H2_SS_CLOSED,
539 .errcode = H2_ERR_PROTOCOL_ERROR,
540 .flags = 0,
541 .id = 0,
542};
543
Willy Tarreau8d0d58b2018-12-23 18:29:12 +0100544/* a dmumy closed stream returning a REFUSED_STREAM error */
545static const struct h2s *h2_refused_stream = &(const struct h2s){
546 .cs = NULL,
547 .h2c = NULL,
548 .st = H2_SS_CLOSED,
549 .errcode = H2_ERR_REFUSED_STREAM,
550 .flags = 0,
551 .id = 0,
552};
553
Willy Tarreau2a856182017-05-16 15:20:39 +0200554/* and a dummy idle stream for use with any unannounced stream */
555static const struct h2s *h2_idle_stream = &(const struct h2s){
556 .cs = NULL,
557 .h2c = NULL,
558 .st = H2_SS_IDLE,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100559 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreau2a856182017-05-16 15:20:39 +0200560 .id = 0,
561};
562
Willy Tarreau144f84a2021-03-02 16:09:26 +0100563struct task *h2_timeout_task(struct task *t, void *context, unsigned int state);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +0200564static int h2_send(struct h2c *h2c);
565static int h2_recv(struct h2c *h2c);
Olivier Houchard7505f942018-08-21 18:10:44 +0200566static int h2_process(struct h2c *h2c);
Willy Tarreau691d5032021-01-20 14:55:01 +0100567/* h2_io_cb is exported to see it resolved in "show fd" */
Willy Tarreau144f84a2021-03-02 16:09:26 +0100568struct task *h2_io_cb(struct task *t, void *ctx, unsigned int state);
Willy Tarreau0b559072018-02-26 15:22:17 +0100569static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id);
Amaury Denoyelle74162742020-12-11 17:53:05 +0100570static 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 +0100571static int h2_frt_transfer_data(struct h2s *h2s);
Willy Tarreau144f84a2021-03-02 16:09:26 +0100572struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned int state);
Olivier Houchardf502aca2018-12-14 19:42:40 +0100573static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess);
Willy Tarreau8b2757c2018-12-19 17:36:48 +0100574static void h2s_alert(struct h2s *h2s);
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200575
Willy Tarreauab2ec452019-08-30 07:07:08 +0200576/* returns a h2c state as an abbreviated 3-letter string, or "???" if unknown */
577static inline const char *h2c_st_to_str(enum h2_cs st)
578{
579 switch (st) {
580 case H2_CS_PREFACE: return "PRF";
581 case H2_CS_SETTINGS1: return "STG";
582 case H2_CS_FRAME_H: return "FRH";
583 case H2_CS_FRAME_P: return "FRP";
584 case H2_CS_FRAME_A: return "FRA";
585 case H2_CS_FRAME_E: return "FRE";
586 case H2_CS_ERROR: return "ERR";
587 case H2_CS_ERROR2: return "ER2";
588 default: return "???";
589 }
590}
591
592/* returns a h2s state as an abbreviated 3-letter string, or "???" if unknown */
593static inline const char *h2s_st_to_str(enum h2_ss st)
594{
595 switch (st) {
596 case H2_SS_IDLE: return "IDL"; // idle
597 case H2_SS_RLOC: return "RSL"; // reserved local
598 case H2_SS_RREM: return "RSR"; // reserved remote
599 case H2_SS_OPEN: return "OPN"; // open
600 case H2_SS_HREM: return "HCR"; // half-closed remote
601 case H2_SS_HLOC: return "HCL"; // half-closed local
602 case H2_SS_ERROR : return "ERR"; // error
603 case H2_SS_CLOSED: return "CLO"; // closed
604 default: return "???";
605 }
606}
607
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200608/* the H2 traces always expect that arg1, if non-null, is of type connection
609 * (from which we can derive h2c), that arg2, if non-null, is of type h2s, and
610 * that arg3, if non-null, is either of type htx for tx headers, or of type
611 * buffer for everything else.
612 */
613static void h2_trace(enum trace_level level, uint64_t mask, const struct trace_source *src,
614 const struct ist where, const struct ist func,
615 const void *a1, const void *a2, const void *a3, const void *a4)
616{
617 const struct connection *conn = a1;
618 const struct h2c *h2c = conn ? conn->ctx : NULL;
619 const struct h2s *h2s = a2;
620 const struct buffer *buf = a3;
621 const struct htx *htx;
622 int pos;
623
624 if (!h2c) // nothing to add
625 return;
626
Willy Tarreau17104d42019-08-30 07:12:55 +0200627 if (src->verbosity > H2_VERB_CLEAN) {
Willy Tarreau73db4342019-09-25 07:28:44 +0200628 chunk_appendf(&trace_buf, " : h2c=%p(%c,%s)", h2c, conn_is_back(conn) ? 'B' : 'F', h2c_st_to_str(h2c->st0));
629
Willy Tarreaue2f68e92021-06-16 17:47:24 +0200630 if (mask & H2_EV_H2C_NEW) // inside h2_init, otherwise it's hard to match conn & h2c
631 conn_append_debug_info(&trace_buf, conn, " : ");
632
Willy Tarreauf3ce0412019-11-24 14:57:00 +0100633 if (h2c->errcode)
634 chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2c->errcode), h2c->errcode);
635
Willy Tarreau73db4342019-09-25 07:28:44 +0200636 if (h2c->dsi >= 0 &&
637 (mask & (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) == (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) {
Willy Tarreau8520d872020-09-18 07:39:29 +0200638 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 +0200639 }
640
641 if (h2s) {
642 if (h2s->id <= 0)
643 chunk_appendf(&trace_buf, " dsi=%d", h2c->dsi);
644 chunk_appendf(&trace_buf, " h2s=%p(%d,%s)", h2s, h2s->id, h2s_st_to_str(h2s->st));
Willy Tarreauf3ce0412019-11-24 14:57:00 +0100645 if (h2s->id && h2s->errcode)
646 chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2s->errcode), h2s->errcode);
Willy Tarreau73db4342019-09-25 07:28:44 +0200647 }
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200648 }
649
650 /* Let's dump decoded requests and responses right after parsing. They
651 * are traced at level USER with a few recognizable flags.
652 */
653 if ((mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW) ||
654 mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR)) && buf)
655 htx = htxbuf(buf); // recv req/res
656 else if (mask == (H2_EV_TX_FRAME|H2_EV_TX_HDR))
657 htx = a3; // send req/res
658 else
659 htx = NULL;
660
Willy Tarreau94f1dcf2019-08-30 07:11:30 +0200661 if (level == TRACE_LEVEL_USER && src->verbosity != H2_VERB_MINIMAL && htx && (pos = htx_get_head(htx)) != -1) {
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200662 const struct htx_blk *blk = htx_get_blk(htx, pos);
663 const struct htx_sl *sl = htx_get_blk_ptr(htx, blk);
664 enum htx_blk_type type = htx_get_blk_type(blk);
665
666 if (type == HTX_BLK_REQ_SL)
667 chunk_appendf(&trace_buf, " : [%d] H2 REQ: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200668 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200669 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
670 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
671 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
672 else if (type == HTX_BLK_RES_SL)
673 chunk_appendf(&trace_buf, " : [%d] H2 RES: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200674 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200675 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
676 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
677 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
678 }
679}
680
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200681
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100682/* Detect a pending read0 for a H2 connection. It happens if a read0 was
683 * already reported on a previous xprt->rcvbuf() AND a frame parser failed
684 * to parse pending data, confirming no more progress is possible because
685 * we're facing a truncated frame. The function returns 1 to report a read0
686 * or 0 otherwise.
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200687 */
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100688static inline int h2c_read0_pending(struct h2c *h2c)
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200689{
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100690 return !!(h2c->flags & H2_CF_END_REACHED);
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200691}
692
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200693/* returns true if the connection is allowed to expire, false otherwise. A
Willy Tarreaud34d25a2022-03-18 14:59:54 +0100694 * connection may expire when it has no attached streams. As long as streams
695 * are attached, the application layer is responsible for timeout management,
696 * and each layer will detach when it doesn't want to wait anymore. When the
697 * last one leaves, the connection must take over timeout management.
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200698 */
699static inline int h2c_may_expire(const struct h2c *h2c)
700{
Willy Tarreaud34d25a2022-03-18 14:59:54 +0100701 return !h2c->nb_cs;
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200702}
703
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +0100704/* update h2c timeout if needed */
705static void h2c_update_timeout(struct h2c *h2c)
706{
707 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
708
709 if (!h2c->task)
710 goto leave;
711
712 if (h2c_may_expire(h2c)) {
713 /* no more streams attached */
714 if (h2c->last_sid >= 0) {
715 /* GOAWAY sent, closing in progress */
716 h2c->task->expire = tick_add_ifset(now_ms, h2c->shut_timeout);
717 } else if (br_data(h2c->mbuf)) {
718 /* pending output data: always the regular data timeout */
719 h2c->task->expire = tick_add_ifset(now_ms, h2c->timeout);
Willy Tarreau46f9bb42022-04-14 11:43:35 +0200720 } else if (!(h2c->flags & H2_CF_IS_BACK) && h2c->max_id > 0 && !b_data(&h2c->dbuf)) {
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +0100721 /* idle after having seen one stream => keep-alive */
Willy Tarreau211fc0b2022-04-13 17:40:28 +0200722 int to;
723
724 if (tick_isset(h2c->proxy->timeout.httpka))
725 to = h2c->proxy->timeout.httpka;
726 else
727 to = h2c->proxy->timeout.httpreq;
728
729 h2c->task->expire = tick_add_ifset(h2c->idle_start, to);
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +0100730 } else {
731 /* before first request, or started to deserialize a
732 * new req => http-request, but only set, not refresh.
733 */
734 int exp = (h2c->flags & H2_CF_IS_BACK) ? TICK_ETERNITY : h2c->proxy->timeout.httpreq;
735 h2c->task->expire = tick_add_ifset(h2c->idle_start, exp);
736 }
737 /* if a timeout above was not set, fall back to the default one */
738 if (!tick_isset(h2c->task->expire))
739 h2c->task->expire = tick_add_ifset(now_ms, h2c->timeout);
740 } else {
741 h2c->task->expire = TICK_ETERNITY;
742 }
743 task_queue(h2c->task);
744 leave:
745 TRACE_LEAVE(H2_EV_H2C_WAKE);
746}
747
Olivier Houchard7a977432019-03-21 15:47:13 +0100748static __inline int
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200749h2c_is_dead(const struct h2c *h2c)
Olivier Houchard7a977432019-03-21 15:47:13 +0100750{
751 if (eb_is_empty(&h2c->streams_by_id) && /* don't close if streams exist */
752 ((h2c->conn->flags & CO_FL_ERROR) || /* errors close immediately */
753 (h2c->st0 >= H2_CS_ERROR && !h2c->task) || /* a timeout stroke earlier */
754 (!(h2c->conn->owner)) || /* Nobody's left to take care of the connection, drop it now */
Willy Tarreau662fafc2019-05-26 09:43:07 +0200755 (!br_data(h2c->mbuf) && /* mux buffer empty, also process clean events below */
Olivier Houchard7a977432019-03-21 15:47:13 +0100756 (conn_xprt_read0_pending(h2c->conn) ||
757 (h2c->last_sid >= 0 && h2c->max_id >= h2c->last_sid)))))
758 return 1;
759
760 return 0;
Olivier Houchard7a977432019-03-21 15:47:13 +0100761}
762
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200763/*****************************************************/
764/* functions below are for dynamic buffer management */
765/*****************************************************/
766
Willy Tarreau315d8072017-12-10 22:17:57 +0100767/* indicates whether or not the we may call the h2_recv() function to attempt
768 * to receive data into the buffer and/or demux pending data. The condition is
769 * a bit complex due to some API limits for now. The rules are the following :
770 * - if an error or a shutdown was detected on the connection and the buffer
771 * is empty, we must not attempt to receive
772 * - if the demux buf failed to be allocated, we must not try to receive and
773 * we know there is nothing pending
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100774 * - if no flag indicates a blocking condition, we may attempt to receive,
775 * regardless of whether the demux buffer is full or not, so that only
776 * de demux part decides whether or not to block. This is needed because
777 * the connection API indeed prevents us from re-enabling receipt that is
778 * already enabled in a polled state, so we must always immediately stop
779 * as soon as the demux can't proceed so as never to hit an end of read
780 * with data pending in the buffers.
Willy Tarreau315d8072017-12-10 22:17:57 +0100781 * - otherwise must may not attempt
782 */
783static inline int h2_recv_allowed(const struct h2c *h2c)
784{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200785 if (b_data(&h2c->dbuf) == 0 &&
Willy Tarreau315d8072017-12-10 22:17:57 +0100786 (h2c->st0 >= H2_CS_ERROR ||
787 h2c->conn->flags & CO_FL_ERROR ||
788 conn_xprt_read0_pending(h2c->conn)))
789 return 0;
790
791 if (!(h2c->flags & H2_CF_DEM_DALLOC) &&
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100792 !(h2c->flags & H2_CF_DEM_BLOCK_ANY))
Willy Tarreau315d8072017-12-10 22:17:57 +0100793 return 1;
794
795 return 0;
796}
797
Willy Tarreau47b515a2018-12-21 16:09:41 +0100798/* restarts reading on the connection if it was not enabled */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200799static inline void h2c_restart_reading(const struct h2c *h2c, int consider_buffer)
Willy Tarreau47b515a2018-12-21 16:09:41 +0100800{
801 if (!h2_recv_allowed(h2c))
802 return;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200803 if ((!consider_buffer || !b_data(&h2c->dbuf))
804 && (h2c->wait_event.events & SUB_RETRY_RECV))
Willy Tarreau47b515a2018-12-21 16:09:41 +0100805 return;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200806 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau47b515a2018-12-21 16:09:41 +0100807}
808
809
Willy Tarreaufa1d3572019-01-31 10:31:51 +0100810/* returns true if the front connection has too many conn_streams attached */
811static inline int h2_frt_has_too_many_cs(const struct h2c *h2c)
Willy Tarreauf2101912018-07-19 10:11:38 +0200812{
Willy Tarreaua8754662018-12-23 20:43:58 +0100813 return h2c->nb_cs > h2_settings_max_concurrent_streams;
Willy Tarreauf2101912018-07-19 10:11:38 +0200814}
815
Willy Tarreau44e973f2018-03-01 17:49:30 +0100816/* Tries to grab a buffer and to re-enable processing on mux <target>. The h2c
817 * flags are used to figure what buffer was requested. It returns 1 if the
818 * allocation succeeds, in which case the connection is woken up, or 0 if it's
819 * impossible to wake up and we prefer to be woken up later.
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200820 */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100821static int h2_buf_available(void *target)
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200822{
823 struct h2c *h2c = target;
Willy Tarreau0b559072018-02-26 15:22:17 +0100824 struct h2s *h2s;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200825
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100826 if ((h2c->flags & H2_CF_DEM_DALLOC) && b_alloc(&h2c->dbuf)) {
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200827 h2c->flags &= ~H2_CF_DEM_DALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200828 h2c_restart_reading(h2c, 1);
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200829 return 1;
830 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200831
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100832 if ((h2c->flags & H2_CF_MUX_MALLOC) && b_alloc(br_tail(h2c->mbuf))) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100833 h2c->flags &= ~H2_CF_MUX_MALLOC;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200834
835 if (h2c->flags & H2_CF_DEM_MROOM) {
836 h2c->flags &= ~H2_CF_DEM_MROOM;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200837 h2c_restart_reading(h2c, 1);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200838 }
Willy Tarreau14398122017-09-22 14:26:04 +0200839 return 1;
840 }
Willy Tarreau0b559072018-02-26 15:22:17 +0100841
842 if ((h2c->flags & H2_CF_DEM_SALLOC) &&
843 (h2s = h2c_st_by_id(h2c, h2c->dsi)) && h2s->cs &&
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100844 b_alloc(&h2s->rxbuf)) {
Willy Tarreau0b559072018-02-26 15:22:17 +0100845 h2c->flags &= ~H2_CF_DEM_SALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200846 h2c_restart_reading(h2c, 1);
Willy Tarreau0b559072018-02-26 15:22:17 +0100847 return 1;
848 }
849
Willy Tarreau14398122017-09-22 14:26:04 +0200850 return 0;
851}
852
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200853static inline struct buffer *h2_get_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200854{
855 struct buffer *buf = NULL;
856
Willy Tarreau2b718102021-04-21 07:32:39 +0200857 if (likely(!LIST_INLIST(&h2c->buf_wait.list)) &&
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100858 unlikely((buf = b_alloc(bptr)) == NULL)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100859 h2c->buf_wait.target = h2c;
860 h2c->buf_wait.wakeup_cb = h2_buf_available;
Willy Tarreau2b718102021-04-21 07:32:39 +0200861 LIST_APPEND(&ti->buffer_wq, &h2c->buf_wait.list);
Willy Tarreau14398122017-09-22 14:26:04 +0200862 }
863 return buf;
864}
865
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200866static inline void h2_release_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200867{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200868 if (bptr->size) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100869 b_free(bptr);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +0100870 offer_buffers(NULL, 1);
Willy Tarreau14398122017-09-22 14:26:04 +0200871 }
872}
873
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200874static inline void h2_release_mbuf(struct h2c *h2c)
875{
876 struct buffer *buf;
877 unsigned int count = 0;
878
879 while (b_size(buf = br_head_pick(h2c->mbuf))) {
880 b_free(buf);
881 count++;
882 }
883 if (count)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +0100884 offer_buffers(NULL, count);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200885}
886
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100887/* returns the number of allocatable outgoing streams for the connection taking
888 * the last_sid and the reserved ones into account.
889 */
890static inline int h2_streams_left(const struct h2c *h2c)
891{
892 int ret;
893
894 /* consider the number of outgoing streams we're allowed to create before
895 * reaching the last GOAWAY frame seen. max_id is the last assigned id,
896 * nb_reserved is the number of streams which don't yet have an ID.
897 */
898 ret = (h2c->last_sid >= 0) ? h2c->last_sid : 0x7FFFFFFF;
899 ret = (unsigned int)(ret - h2c->max_id) / 2 - h2c->nb_reserved - 1;
900 if (ret < 0)
901 ret = 0;
902 return ret;
903}
904
Willy Tarreau00f18a32019-01-26 12:19:01 +0100905/* returns the number of streams in use on a connection to figure if it's
906 * idle or not. We check nb_cs and not nb_streams as the caller will want
907 * to know if it was the last one after a detach().
908 */
909static int h2_used_streams(struct connection *conn)
910{
911 struct h2c *h2c = conn->ctx;
912
913 return h2c->nb_cs;
914}
915
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100916/* returns the number of concurrent streams available on the connection */
Olivier Houchardd540b362018-11-05 18:37:53 +0100917static int h2_avail_streams(struct connection *conn)
918{
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100919 struct server *srv = objt_server(conn->target);
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100920 struct h2c *h2c = conn->ctx;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100921 int ret1, ret2;
Olivier Houchardd540b362018-11-05 18:37:53 +0100922
Willy Tarreau6afec462019-01-28 06:40:19 +0100923 /* RFC7540#6.8: Receivers of a GOAWAY frame MUST NOT open additional
924 * streams on the connection.
925 */
926 if (h2c->last_sid >= 0)
927 return 0;
928
Willy Tarreauc61966f2019-10-31 15:10:03 +0100929 if (h2c->st0 >= H2_CS_ERROR)
930 return 0;
931
Willy Tarreau86949782019-01-31 10:42:05 +0100932 /* note: may be negative if a SETTINGS frame changes the limit */
933 ret1 = h2c->streams_limit - h2c->nb_streams;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100934
935 /* we must also consider the limit imposed by stream IDs */
936 ret2 = h2_streams_left(h2c);
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100937 ret1 = MIN(ret1, ret2);
Willy Tarreau86949782019-01-31 10:42:05 +0100938 if (ret1 > 0 && srv && srv->max_reuse >= 0) {
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100939 ret2 = h2c->stream_cnt <= srv->max_reuse ? srv->max_reuse - h2c->stream_cnt + 1: 0;
940 ret1 = MIN(ret1, ret2);
941 }
942 return ret1;
Olivier Houchardd540b362018-11-05 18:37:53 +0100943}
944
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200945
Willy Tarreau62f52692017-10-08 23:01:42 +0200946/*****************************************************************/
947/* functions below are dedicated to the mux setup and management */
948/*****************************************************************/
949
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200950/* Initialize the mux once it's attached. For outgoing connections, the context
951 * is already initialized before installing the mux, so we detect incoming
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200952 * connections from the fact that the context is still NULL (even during mux
953 * upgrades). <input> is always used as Input buffer and may contain data. It is
954 * the caller responsibility to not reuse it anymore. Returns < 0 on error.
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200955 */
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200956static int h2_init(struct connection *conn, struct proxy *prx, struct session *sess,
957 struct buffer *input)
Willy Tarreau32218eb2017-09-22 08:07:25 +0200958{
959 struct h2c *h2c;
Willy Tarreauea392822017-10-31 10:02:25 +0100960 struct task *t = NULL;
Christopher Fauletf81ef032019-10-04 15:19:43 +0200961 void *conn_ctx = conn->ctx;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200962
Christopher Fauletf81ef032019-10-04 15:19:43 +0200963 TRACE_ENTER(H2_EV_H2C_NEW);
Willy Tarreau7838a792019-08-12 18:42:03 +0200964
Willy Tarreaubafbe012017-11-24 17:34:44 +0100965 h2c = pool_alloc(pool_head_h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200966 if (!h2c)
mildiscd2d7de2018-10-02 16:44:18 +0200967 goto fail_no_h2c;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200968
Christopher Faulete9b70722019-04-08 10:46:02 +0200969 if (conn_is_back(conn)) {
Willy Tarreau01b44822018-10-03 14:26:37 +0200970 h2c->flags = H2_CF_IS_BACK;
971 h2c->shut_timeout = h2c->timeout = prx->timeout.server;
972 if (tick_isset(prx->timeout.serverfin))
973 h2c->shut_timeout = prx->timeout.serverfin;
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100974
975 h2c->px_counters = EXTRA_COUNTERS_GET(prx->extra_counters_be,
976 &h2_stats_module);
Willy Tarreau01b44822018-10-03 14:26:37 +0200977 } else {
978 h2c->flags = H2_CF_NONE;
979 h2c->shut_timeout = h2c->timeout = prx->timeout.client;
980 if (tick_isset(prx->timeout.clientfin))
981 h2c->shut_timeout = prx->timeout.clientfin;
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100982
983 h2c->px_counters = EXTRA_COUNTERS_GET(prx->extra_counters_fe,
984 &h2_stats_module);
Willy Tarreau01b44822018-10-03 14:26:37 +0200985 }
Willy Tarreau3f133572017-10-31 19:21:06 +0100986
Willy Tarreau0b37d652018-10-03 10:33:02 +0200987 h2c->proxy = prx;
Willy Tarreau33400292017-11-05 11:23:40 +0100988 h2c->task = NULL;
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +0100989 h2c->idle_start = now_ms;
Willy Tarreau3f133572017-10-31 19:21:06 +0100990 if (tick_isset(h2c->timeout)) {
991 t = task_new(tid_bit);
992 if (!t)
993 goto fail;
994
995 h2c->task = t;
996 t->process = h2_timeout_task;
997 t->context = h2c;
998 t->expire = tick_add(now_ms, h2c->timeout);
999 }
Willy Tarreauea392822017-10-31 10:02:25 +01001000
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001001 h2c->wait_event.tasklet = tasklet_new();
1002 if (!h2c->wait_event.tasklet)
Olivier Houchard910b2bc2018-07-17 18:49:38 +02001003 goto fail;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001004 h2c->wait_event.tasklet->process = h2_io_cb;
1005 h2c->wait_event.tasklet->context = h2c;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001006 h2c->wait_event.events = 0;
Amaury Denoyelled3a88c12021-05-03 10:47:51 +02001007 if (!conn_is_back(conn)) {
1008 /* Connection might already be in the stopping_list if subject
1009 * to h1->h2 upgrade.
1010 */
1011 if (!LIST_INLIST(&conn->stopping_list)) {
1012 LIST_APPEND(&mux_stopping_data[tid].list,
1013 &conn->stopping_list);
1014 }
1015 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02001016
Willy Tarreau2bdcc702020-05-19 11:31:11 +02001017 h2c->ddht = hpack_dht_alloc();
Willy Tarreau32218eb2017-09-22 08:07:25 +02001018 if (!h2c->ddht)
1019 goto fail;
1020
1021 /* Initialise the context. */
1022 h2c->st0 = H2_CS_PREFACE;
1023 h2c->conn = conn;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01001024 h2c->streams_limit = h2_settings_max_concurrent_streams;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001025 h2c->max_id = -1;
1026 h2c->errcode = H2_ERR_NO_ERROR;
Willy Tarreau97aaa672018-12-23 09:49:04 +01001027 h2c->rcvd_c = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001028 h2c->rcvd_s = 0;
Willy Tarreau49745612017-12-03 18:56:02 +01001029 h2c->nb_streams = 0;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001030 h2c->nb_cs = 0;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001031 h2c->nb_reserved = 0;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001032 h2c->stream_cnt = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001033
Christopher Faulet51f73eb2019-04-08 11:22:47 +02001034 h2c->dbuf = *input;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001035 h2c->dsi = -1;
1036 h2c->msi = -1;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001037
Willy Tarreau32218eb2017-09-22 08:07:25 +02001038 h2c->last_sid = -1;
1039
Willy Tarreau51330962019-05-26 09:38:07 +02001040 br_init(h2c->mbuf, sizeof(h2c->mbuf) / sizeof(h2c->mbuf[0]));
Willy Tarreau32218eb2017-09-22 08:07:25 +02001041 h2c->miw = 65535; /* mux initial window size */
1042 h2c->mws = 65535; /* mux window size */
1043 h2c->mfs = 16384; /* initial max frame size */
Willy Tarreau751f2d02018-10-05 09:35:00 +02001044 h2c->streams_by_id = EB_ROOT;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001045 LIST_INIT(&h2c->send_list);
1046 LIST_INIT(&h2c->fctl_list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +02001047 LIST_INIT(&h2c->blocked_list);
Willy Tarreau90f366b2021-02-20 11:49:49 +01001048 LIST_INIT(&h2c->buf_wait.list);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001049
Christopher Fauletf81ef032019-10-04 15:19:43 +02001050 conn->ctx = h2c;
1051
Willy Tarreaue2f68e92021-06-16 17:47:24 +02001052 TRACE_USER("new H2 connection", H2_EV_H2C_NEW, conn);
1053
Willy Tarreau3f133572017-10-31 19:21:06 +01001054 if (t)
1055 task_queue(t);
Willy Tarreauea392822017-10-31 10:02:25 +01001056
Willy Tarreau01b44822018-10-03 14:26:37 +02001057 if (h2c->flags & H2_CF_IS_BACK) {
1058 /* FIXME: this is temporary, for outgoing connections we need
1059 * to immediately allocate a stream until the code is modified
1060 * so that the caller calls ->attach(). For now the outgoing cs
Christopher Fauletf81ef032019-10-04 15:19:43 +02001061 * is stored as conn->ctx by the caller and saved in conn_ctx.
Willy Tarreau01b44822018-10-03 14:26:37 +02001062 */
1063 struct h2s *h2s;
1064
Christopher Fauletf81ef032019-10-04 15:19:43 +02001065 h2s = h2c_bck_stream_new(h2c, conn_ctx, sess);
Willy Tarreau01b44822018-10-03 14:26:37 +02001066 if (!h2s)
1067 goto fail_stream;
1068 }
1069
Willy Tarreau4781b152021-04-06 13:53:36 +02001070 HA_ATOMIC_INC(&h2c->px_counters->open_conns);
1071 HA_ATOMIC_INC(&h2c->px_counters->total_conns);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001072
Willy Tarreau0f383582018-10-03 14:22:21 +02001073 /* prepare to read something */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02001074 h2c_restart_reading(h2c, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001075 TRACE_LEAVE(H2_EV_H2C_NEW, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001076 return 0;
Willy Tarreau01b44822018-10-03 14:26:37 +02001077 fail_stream:
1078 hpack_dht_free(h2c->ddht);
mildiscd2d7de2018-10-02 16:44:18 +02001079 fail:
Willy Tarreauf6562792019-05-07 19:05:35 +02001080 task_destroy(t);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001081 if (h2c->wait_event.tasklet)
1082 tasklet_free(h2c->wait_event.tasklet);
Willy Tarreaubafbe012017-11-24 17:34:44 +01001083 pool_free(pool_head_h2c, h2c);
mildiscd2d7de2018-10-02 16:44:18 +02001084 fail_no_h2c:
Willy Tarreau8802bf12022-01-12 17:24:26 +01001085 if (!conn_is_back(conn))
1086 LIST_DEL_INIT(&conn->stopping_list);
Christopher Fauletf81ef032019-10-04 15:19:43 +02001087 conn->ctx = conn_ctx; /* restore saved ctx */
1088 TRACE_DEVEL("leaving in error", H2_EV_H2C_NEW|H2_EV_H2C_END|H2_EV_H2C_ERR);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001089 return -1;
1090}
1091
Willy Tarreau751f2d02018-10-05 09:35:00 +02001092/* returns the next allocatable outgoing stream ID for the H2 connection, or
1093 * -1 if no more is allocatable.
1094 */
1095static inline int32_t h2c_get_next_sid(const struct h2c *h2c)
1096{
1097 int32_t id = (h2c->max_id + 1) | 1;
Willy Tarreaua80dca82019-01-24 17:08:28 +01001098
1099 if ((id & 0x80000000U) || (h2c->last_sid >= 0 && id > h2c->last_sid))
Willy Tarreau751f2d02018-10-05 09:35:00 +02001100 id = -1;
1101 return id;
1102}
1103
Willy Tarreau2373acc2017-10-12 17:35:14 +02001104/* returns the stream associated with id <id> or NULL if not found */
1105static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id)
1106{
1107 struct eb32_node *node;
1108
Willy Tarreau751f2d02018-10-05 09:35:00 +02001109 if (id == 0)
1110 return (struct h2s *)h2_closed_stream;
1111
Willy Tarreau2a856182017-05-16 15:20:39 +02001112 if (id > h2c->max_id)
1113 return (struct h2s *)h2_idle_stream;
1114
Willy Tarreau2373acc2017-10-12 17:35:14 +02001115 node = eb32_lookup(&h2c->streams_by_id, id);
1116 if (!node)
Willy Tarreau2a856182017-05-16 15:20:39 +02001117 return (struct h2s *)h2_closed_stream;
Willy Tarreau2373acc2017-10-12 17:35:14 +02001118
1119 return container_of(node, struct h2s, by_id);
1120}
1121
Christopher Faulet73c12072019-04-08 11:23:22 +02001122/* release function. This one should be called to free all resources allocated
1123 * to the mux.
Willy Tarreau62f52692017-10-08 23:01:42 +02001124 */
Christopher Faulet73c12072019-04-08 11:23:22 +02001125static void h2_release(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02001126{
William Dauchy477757c2020-08-07 22:19:23 +02001127 struct connection *conn = NULL;
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001128
Willy Tarreau7838a792019-08-12 18:42:03 +02001129 TRACE_ENTER(H2_EV_H2C_END);
1130
Willy Tarreau32218eb2017-09-22 08:07:25 +02001131 if (h2c) {
Christopher Faulet61840e72019-04-15 09:33:32 +02001132 /* The connection must be aattached to this mux to be released */
1133 if (h2c->conn && h2c->conn->ctx == h2c)
1134 conn = h2c->conn;
1135
Willy Tarreau7838a792019-08-12 18:42:03 +02001136 TRACE_DEVEL("freeing h2c", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001137 hpack_dht_free(h2c->ddht);
Willy Tarreau14398122017-09-22 14:26:04 +02001138
Willy Tarreau2b718102021-04-21 07:32:39 +02001139 if (LIST_INLIST(&h2c->buf_wait.list))
Willy Tarreau90f366b2021-02-20 11:49:49 +01001140 LIST_DEL_INIT(&h2c->buf_wait.list);
Willy Tarreau14398122017-09-22 14:26:04 +02001141
Willy Tarreau44e973f2018-03-01 17:49:30 +01001142 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau2e3c0002019-05-26 09:45:23 +02001143 h2_release_mbuf(h2c);
Willy Tarreau44e973f2018-03-01 17:49:30 +01001144
Willy Tarreauea392822017-10-31 10:02:25 +01001145 if (h2c->task) {
Willy Tarreau0975f112018-03-29 15:22:59 +02001146 h2c->task->context = NULL;
1147 task_wakeup(h2c->task, TASK_WOKEN_OTHER);
Willy Tarreauea392822017-10-31 10:02:25 +01001148 h2c->task = NULL;
1149 }
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001150 if (h2c->wait_event.tasklet)
1151 tasklet_free(h2c->wait_event.tasklet);
Christopher Faulet21d849f2019-09-18 11:07:20 +02001152 if (conn && h2c->wait_event.events != 0)
Olivier Houcharde179d0e2019-03-21 18:27:17 +01001153 conn->xprt->unsubscribe(conn, conn->xprt_ctx, h2c->wait_event.events,
Christopher Faulet21d849f2019-09-18 11:07:20 +02001154 &h2c->wait_event);
Willy Tarreauea392822017-10-31 10:02:25 +01001155
Willy Tarreau4781b152021-04-06 13:53:36 +02001156 HA_ATOMIC_DEC(&h2c->px_counters->open_conns);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001157
Willy Tarreaubafbe012017-11-24 17:34:44 +01001158 pool_free(pool_head_h2c, h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001159 }
1160
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001161 if (conn) {
Amaury Denoyelled3a88c12021-05-03 10:47:51 +02001162 if (!conn_is_back(conn))
1163 LIST_DEL_INIT(&conn->stopping_list);
1164
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001165 conn->mux = NULL;
1166 conn->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02001167 TRACE_DEVEL("freeing conn", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001168
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001169 conn_stop_tracking(conn);
Willy Tarreaudaa0e5f2021-10-21 22:24:31 +02001170
1171 /* there might be a GOAWAY frame still pending in the TCP
1172 * stack, and if the peer continues to send (i.e. window
1173 * updates etc), this can result in losing the GOAWAY. For
1174 * this reason we try to drain anything received in between.
1175 */
1176 conn->flags |= CO_FL_WANT_DRAIN;
1177
1178 conn_xprt_shutw(conn);
1179 conn_xprt_close(conn);
1180 conn_sock_shutw(conn, !conn_is_back(conn));
1181 conn_ctrl_close(conn);
1182
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001183 if (conn->destroy_cb)
1184 conn->destroy_cb(conn);
1185 conn_free(conn);
1186 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001187
1188 TRACE_LEAVE(H2_EV_H2C_END);
Willy Tarreau62f52692017-10-08 23:01:42 +02001189}
1190
1191
Willy Tarreau71681172017-10-23 14:39:06 +02001192/******************************************************/
1193/* functions below are for the H2 protocol processing */
1194/******************************************************/
1195
1196/* returns the stream if of stream <h2s> or 0 if <h2s> is NULL */
Willy Tarreau1f094672017-11-20 21:27:45 +01001197static inline __maybe_unused int h2s_id(const struct h2s *h2s)
Willy Tarreau71681172017-10-23 14:39:06 +02001198{
1199 return h2s ? h2s->id : 0;
1200}
1201
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001202/* returns the sum of the stream's own window size and the mux's initial
1203 * window, which together form the stream's effective window size.
1204 */
1205static inline int h2s_mws(const struct h2s *h2s)
1206{
1207 return h2s->sws + h2s->h2c->miw;
1208}
1209
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001210/* returns true of the mux is currently busy as seen from stream <h2s> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001211static inline __maybe_unused int h2c_mux_busy(const struct h2c *h2c, const struct h2s *h2s)
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001212{
1213 if (h2c->msi < 0)
1214 return 0;
1215
1216 if (h2c->msi == h2s_id(h2s))
1217 return 0;
1218
1219 return 1;
1220}
1221
Willy Tarreauec26f622022-04-13 09:40:52 +02001222/* marks an error on the connection. Before settings are sent, we must not send
1223 * a GOAWAY frame, and the error state will prevent h2c_send_goaway_error()
1224 * from verifying this so we set H2_CF_GOAWAY_FAILED to make sure it will not
1225 * even try.
1226 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001227static inline __maybe_unused void h2c_error(struct h2c *h2c, enum h2_err err)
Willy Tarreau741d6df2017-10-17 08:00:59 +02001228{
Willy Tarreau022e5e52020-09-10 09:33:15 +02001229 TRACE_POINT(H2_EV_H2C_ERR, h2c->conn, 0, 0, (void *)(long)(err));
Willy Tarreau741d6df2017-10-17 08:00:59 +02001230 h2c->errcode = err;
Willy Tarreauec26f622022-04-13 09:40:52 +02001231 if (h2c->st0 < H2_CS_SETTINGS1)
1232 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau741d6df2017-10-17 08:00:59 +02001233 h2c->st0 = H2_CS_ERROR;
1234}
1235
Willy Tarreau175cebb2019-01-24 10:02:24 +01001236/* marks an error on the stream. It may also update an already closed stream
1237 * (e.g. to report an error after an RST was received).
1238 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001239static inline __maybe_unused void h2s_error(struct h2s *h2s, enum h2_err err)
Willy Tarreau2e43f082017-10-17 08:03:59 +02001240{
Willy Tarreau175cebb2019-01-24 10:02:24 +01001241 if (h2s->id && h2s->st != H2_SS_ERROR) {
Willy Tarreau022e5e52020-09-10 09:33:15 +02001242 TRACE_POINT(H2_EV_H2S_ERR, h2s->h2c->conn, h2s, 0, (void *)(long)(err));
Willy Tarreau2e43f082017-10-17 08:03:59 +02001243 h2s->errcode = err;
Willy Tarreau175cebb2019-01-24 10:02:24 +01001244 if (h2s->st < H2_SS_ERROR)
1245 h2s->st = H2_SS_ERROR;
Willy Tarreauec988c72018-12-19 18:00:29 +01001246 if (h2s->cs)
1247 cs_set_error(h2s->cs);
Willy Tarreau2e43f082017-10-17 08:03:59 +02001248 }
1249}
1250
Willy Tarreau7e094452018-12-19 18:08:52 +01001251/* attempt to notify the data layer of recv availability */
1252static void __maybe_unused h2s_notify_recv(struct h2s *h2s)
1253{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001254 if (h2s->subs && h2s->subs->events & SUB_RETRY_RECV) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001255 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01001256 tasklet_wakeup(h2s->subs->tasklet);
1257 h2s->subs->events &= ~SUB_RETRY_RECV;
1258 if (!h2s->subs->events)
1259 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001260 }
1261}
1262
1263/* attempt to notify the data layer of send availability */
1264static void __maybe_unused h2s_notify_send(struct h2s *h2s)
1265{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001266 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001267 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01001268 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01001269 tasklet_wakeup(h2s->subs->tasklet);
1270 h2s->subs->events &= ~SUB_RETRY_SEND;
1271 if (!h2s->subs->events)
1272 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001273 }
Willy Tarreau5723f292020-01-10 15:16:57 +01001274 else if (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) {
1275 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
1276 tasklet_wakeup(h2s->shut_tl);
1277 }
Willy Tarreau7e094452018-12-19 18:08:52 +01001278}
1279
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001280/* alerts the data layer, trying to wake it up by all means, following
1281 * this sequence :
1282 * - if the h2s' data layer is subscribed to recv, then it's woken up for recv
1283 * - if its subscribed to send, then it's woken up for send
1284 * - if it was subscribed to neither, its ->wake() callback is called
1285 * It is safe to call this function with a closed stream which doesn't have a
1286 * conn_stream anymore.
1287 */
1288static void __maybe_unused h2s_alert(struct h2s *h2s)
1289{
Willy Tarreau7838a792019-08-12 18:42:03 +02001290 TRACE_ENTER(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
1291
Willy Tarreauf96508a2020-01-10 11:12:48 +01001292 if (h2s->subs ||
Willy Tarreau5723f292020-01-10 15:16:57 +01001293 (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW))) {
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001294 h2s_notify_recv(h2s);
1295 h2s_notify_send(h2s);
1296 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001297 else if (h2s->cs && h2s->cs->data_cb->wake != NULL) {
1298 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001299 h2s->cs->data_cb->wake(h2s->cs);
Willy Tarreau7838a792019-08-12 18:42:03 +02001300 }
1301
1302 TRACE_LEAVE(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001303}
1304
Willy Tarreaue4820742017-07-27 13:37:23 +02001305/* writes the 24-bit frame size <len> at address <frame> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001306static inline __maybe_unused void h2_set_frame_size(void *frame, uint32_t len)
Willy Tarreaue4820742017-07-27 13:37:23 +02001307{
1308 uint8_t *out = frame;
1309
1310 *out = len >> 16;
1311 write_n16(out + 1, len);
1312}
1313
Willy Tarreau54c15062017-10-10 17:10:03 +02001314/* reads <bytes> bytes from buffer <b> starting at relative offset <o> from the
1315 * current pointer, dealing with wrapping, and stores the result in <dst>. It's
1316 * the caller's responsibility to verify that there are at least <bytes> bytes
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001317 * available in the buffer's input prior to calling this function. The buffer
1318 * is assumed not to hold any output data.
Willy Tarreau54c15062017-10-10 17:10:03 +02001319 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001320static inline __maybe_unused void h2_get_buf_bytes(void *dst, size_t bytes,
Willy Tarreau54c15062017-10-10 17:10:03 +02001321 const struct buffer *b, int o)
1322{
Willy Tarreau591d4452018-06-15 17:21:00 +02001323 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 +02001324}
1325
Willy Tarreau1f094672017-11-20 21:27:45 +01001326static inline __maybe_unused uint16_t h2_get_n16(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001327{
Willy Tarreau591d4452018-06-15 17:21:00 +02001328 return readv_n16(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001329}
1330
Willy Tarreau1f094672017-11-20 21:27:45 +01001331static inline __maybe_unused uint32_t h2_get_n32(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001332{
Willy Tarreau591d4452018-06-15 17:21:00 +02001333 return readv_n32(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001334}
1335
Willy Tarreau1f094672017-11-20 21:27:45 +01001336static inline __maybe_unused uint64_t h2_get_n64(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001337{
Willy Tarreau591d4452018-06-15 17:21:00 +02001338 return readv_n64(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001339}
1340
1341
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001342/* Peeks an H2 frame header from offset <o> of buffer <b> into descriptor <h>.
1343 * The algorithm is not obvious. It turns out that H2 headers are neither
1344 * aligned nor do they use regular sizes. And to add to the trouble, the buffer
1345 * may wrap so each byte read must be checked. The header is formed like this :
Willy Tarreau715d5312017-07-11 15:20:24 +02001346 *
1347 * b0 b1 b2 b3 b4 b5..b8
1348 * +----------+---------+--------+----+----+----------------------+
1349 * |len[23:16]|len[15:8]|len[7:0]|type|flag|sid[31:0] (big endian)|
1350 * +----------+---------+--------+----+----+----------------------+
1351 *
1352 * Here we read a big-endian 64 bit word from h[1]. This way in a single read
1353 * we get the sid properly aligned and ordered, and 16 bits of len properly
1354 * ordered as well. The type and flags can be extracted using bit shifts from
1355 * the word, and only one extra read is needed to fetch len[16:23].
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001356 * Returns zero if some bytes are missing, otherwise non-zero on success. The
1357 * buffer is assumed not to contain any output data.
Willy Tarreau715d5312017-07-11 15:20:24 +02001358 */
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001359static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, int o, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001360{
1361 uint64_t w;
1362
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001363 if (b_data(b) < o + 9)
Willy Tarreau715d5312017-07-11 15:20:24 +02001364 return 0;
1365
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001366 w = h2_get_n64(b, o + 1);
1367 h->len = *(uint8_t*)b_peek(b, o) << 16;
Willy Tarreau715d5312017-07-11 15:20:24 +02001368 h->sid = w & 0x7FFFFFFF; /* RFC7540#4.1: R bit must be ignored */
1369 h->ff = w >> 32;
1370 h->ft = w >> 40;
1371 h->len += w >> 48;
1372 return 1;
1373}
1374
1375/* skip the next 9 bytes corresponding to the frame header possibly parsed by
1376 * h2_peek_frame_hdr() above.
1377 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001378static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b)
Willy Tarreau715d5312017-07-11 15:20:24 +02001379{
Willy Tarreaue5f12ce2018-06-15 10:28:05 +02001380 b_del(b, 9);
Willy Tarreau715d5312017-07-11 15:20:24 +02001381}
1382
1383/* same as above, automatically advances the buffer on success */
Willy Tarreau1f094672017-11-20 21:27:45 +01001384static inline __maybe_unused int h2_get_frame_hdr(struct buffer *b, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001385{
1386 int ret;
1387
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001388 ret = h2_peek_frame_hdr(b, 0, h);
Willy Tarreau715d5312017-07-11 15:20:24 +02001389 if (ret > 0)
1390 h2_skip_frame_hdr(b);
1391 return ret;
1392}
1393
Willy Tarreaucb985a42019-10-07 16:56:34 +02001394
1395/* try to fragment the headers frame present at the beginning of buffer <b>,
1396 * enforcing a limit of <mfs> bytes per frame. Returns 0 on failure, 1 on
1397 * success. Typical causes of failure include a buffer not large enough to
1398 * add extra frame headers. The existing frame size is read in the current
1399 * frame. Its EH flag will be cleared if CONTINUATION frames need to be added,
1400 * and its length will be adjusted. The stream ID for continuation frames will
1401 * be copied from the initial frame's.
1402 */
1403static int h2_fragment_headers(struct buffer *b, uint32_t mfs)
1404{
1405 size_t remain = b->data - 9;
1406 int extra_frames = (remain - 1) / mfs;
1407 size_t fsize;
1408 char *fptr;
1409 int frame;
1410
1411 if (b->data <= mfs + 9)
1412 return 1;
1413
1414 /* Too large a frame, we need to fragment it using CONTINUATION
1415 * frames. We start from the end and move tails as needed.
1416 */
1417 if (b->data + extra_frames * 9 > b->size)
1418 return 0;
1419
1420 for (frame = extra_frames; frame; frame--) {
1421 fsize = ((remain - 1) % mfs) + 1;
1422 remain -= fsize;
1423
1424 /* move data */
1425 fptr = b->area + 9 + remain + (frame - 1) * 9;
1426 memmove(fptr + 9, b->area + 9 + remain, fsize);
1427 b->data += 9;
1428
1429 /* write new frame header */
1430 h2_set_frame_size(fptr, fsize);
1431 fptr[3] = H2_FT_CONTINUATION;
1432 fptr[4] = (frame == extra_frames) ? H2_F_HEADERS_END_HEADERS : 0;
1433 write_n32(fptr + 5, read_n32(b->area + 5));
1434 }
1435
1436 b->area[4] &= ~H2_F_HEADERS_END_HEADERS;
1437 h2_set_frame_size(b->area, remain);
1438 return 1;
1439}
1440
1441
Willy Tarreau00dd0782018-03-01 16:31:34 +01001442/* marks stream <h2s> as CLOSED and decrement the number of active streams for
1443 * its connection if the stream was not yet closed. Please use this exclusively
1444 * before closing a stream to ensure stream count is well maintained.
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001445 */
Willy Tarreau00dd0782018-03-01 16:31:34 +01001446static inline void h2s_close(struct h2s *h2s)
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001447{
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001448 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001449 TRACE_ENTER(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001450 h2s->h2c->nb_streams--;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001451 if (!h2s->id)
1452 h2s->h2c->nb_reserved--;
Willy Tarreaua27db382019-03-25 18:13:16 +01001453 if (h2s->cs) {
Willy Tarreaua27db382019-03-25 18:13:16 +01001454 if (!(h2s->cs->flags & CS_FL_EOS) && !b_data(&h2s->rxbuf))
1455 h2s_notify_recv(h2s);
1456 }
Willy Tarreau4781b152021-04-06 13:53:36 +02001457 HA_ATOMIC_DEC(&h2s->h2c->px_counters->open_streams);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001458
Willy Tarreau7838a792019-08-12 18:42:03 +02001459 TRACE_LEAVE(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001460 }
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001461 h2s->st = H2_SS_CLOSED;
1462}
1463
Willy Tarreau71049cc2018-03-28 13:56:39 +02001464/* detaches an H2 stream from its H2C and releases it to the H2S pool. */
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001465/* h2s_destroy should only ever be called by the thread that owns the stream,
1466 * that means that a tasklet should be used if we want to destroy the h2s
1467 * from another thread
1468 */
Willy Tarreau71049cc2018-03-28 13:56:39 +02001469static void h2s_destroy(struct h2s *h2s)
Willy Tarreau0a10de62018-03-01 16:27:53 +01001470{
Willy Tarreau7838a792019-08-12 18:42:03 +02001471 struct connection *conn = h2s->h2c->conn;
1472
1473 TRACE_ENTER(H2_EV_H2S_END, conn, h2s);
1474
Willy Tarreau0a10de62018-03-01 16:27:53 +01001475 h2s_close(h2s);
1476 eb32_delete(&h2s->by_id);
Olivier Houchard638b7992018-08-16 15:41:52 +02001477 if (b_size(&h2s->rxbuf)) {
1478 b_free(&h2s->rxbuf);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01001479 offer_buffers(NULL, 1);
Olivier Houchard638b7992018-08-16 15:41:52 +02001480 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001481
1482 if (h2s->subs)
1483 h2s->subs->events = 0;
1484
Joseph Herlantd77575d2018-11-25 10:54:45 -08001485 /* There's no need to explicitly call unsubscribe here, the only
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001486 * reference left would be in the h2c send_list/fctl_list, and if
1487 * we're in it, we're getting out anyway
1488 */
Olivier Houchardd360ac62019-03-22 17:37:16 +01001489 LIST_DEL_INIT(&h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01001490
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001491 /* ditto, calling tasklet_free() here should be ok */
Willy Tarreau5723f292020-01-10 15:16:57 +01001492 tasklet_free(h2s->shut_tl);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001493 pool_free(pool_head_h2s, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001494
1495 TRACE_LEAVE(H2_EV_H2S_END, conn);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001496}
1497
Willy Tarreaua8e49542018-10-03 18:53:55 +02001498/* allocates a new stream <id> for connection <h2c> and adds it into h2c's
1499 * stream tree. In case of error, nothing is added and NULL is returned. The
1500 * causes of errors can be any failed memory allocation. The caller is
1501 * responsible for checking if the connection may support an extra stream
1502 * prior to calling this function.
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001503 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02001504static struct h2s *h2s_new(struct h2c *h2c, int id)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001505{
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001506 struct h2s *h2s;
1507
Willy Tarreau7838a792019-08-12 18:42:03 +02001508 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1509
Willy Tarreaubafbe012017-11-24 17:34:44 +01001510 h2s = pool_alloc(pool_head_h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001511 if (!h2s)
1512 goto out;
1513
Willy Tarreau5723f292020-01-10 15:16:57 +01001514 h2s->shut_tl = tasklet_new();
1515 if (!h2s->shut_tl) {
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001516 pool_free(pool_head_h2s, h2s);
1517 goto out;
1518 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001519 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01001520 h2s->shut_tl->process = h2_deferred_shut;
1521 h2s->shut_tl->context = h2s;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001522 LIST_INIT(&h2s->list);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001523 h2s->h2c = h2c;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001524 h2s->cs = NULL;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001525 h2s->sws = 0;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001526 h2s->flags = H2_SF_NONE;
1527 h2s->errcode = H2_ERR_NO_ERROR;
1528 h2s->st = H2_SS_IDLE;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02001529 h2s->status = 0;
Willy Tarreau1915ca22019-01-24 11:49:37 +01001530 h2s->body_len = 0;
Olivier Houchard638b7992018-08-16 15:41:52 +02001531 h2s->rxbuf = BUF_NULL;
Amaury Denoyelle74162742020-12-11 17:53:05 +01001532 memset(h2s->upgrade_protocol, 0, sizeof(h2s->upgrade_protocol));
Willy Tarreau751f2d02018-10-05 09:35:00 +02001533
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001534 h2s->by_id.key = h2s->id = id;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001535 if (id > 0)
1536 h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001537 else
1538 h2c->nb_reserved++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001539
1540 eb32_insert(&h2c->streams_by_id, &h2s->by_id);
Willy Tarreau49745612017-12-03 18:56:02 +01001541 h2c->nb_streams++;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001542 h2c->stream_cnt++;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001543
Willy Tarreau4781b152021-04-06 13:53:36 +02001544 HA_ATOMIC_INC(&h2c->px_counters->open_streams);
1545 HA_ATOMIC_INC(&h2c->px_counters->total_streams);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001546
Willy Tarreau7838a792019-08-12 18:42:03 +02001547 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001548 return h2s;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001549 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001550 TRACE_DEVEL("leaving in error", H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001551 return NULL;
1552}
1553
1554/* creates a new stream <id> on the h2c connection and returns it, or NULL in
Christopher Faulet7d013e72020-12-15 16:56:50 +01001555 * case of memory allocation error. <input> is used as input buffer for the new
1556 * stream. On success, it is transferred to the stream and the mux is no longer
1557 * responsible of it. On error, <input> is unchanged, thus the mux must still
1558 * take care of it.
Willy Tarreaua8e49542018-10-03 18:53:55 +02001559 */
Amaury Denoyelleee7fcd52021-10-18 14:45:49 +02001560static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id, struct buffer *input, uint32_t flags)
Willy Tarreaua8e49542018-10-03 18:53:55 +02001561{
1562 struct session *sess = h2c->conn->owner;
1563 struct conn_stream *cs;
1564 struct h2s *h2s;
1565
Willy Tarreau7838a792019-08-12 18:42:03 +02001566 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1567
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001568 if (h2c->nb_streams >= h2_settings_max_concurrent_streams) {
1569 TRACE_ERROR("HEADERS frame causing MAX_CONCURRENT_STREAMS to be exceeded", H2_EV_H2S_NEW|H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001570 goto out;
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001571 }
Willy Tarreaua8e49542018-10-03 18:53:55 +02001572
1573 h2s = h2s_new(h2c, id);
1574 if (!h2s)
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001575 goto out_alloc;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001576
Christopher Faulet236c93b2020-07-02 09:19:54 +02001577 cs = cs_new(h2c->conn, h2c->conn->target);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001578 if (!cs)
1579 goto out_close;
1580
Olivier Houchard746fb772018-12-15 19:42:00 +01001581 cs->flags |= CS_FL_NOT_FIRST;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001582 h2s->cs = cs;
1583 cs->ctx = h2s;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001584 h2c->nb_cs++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001585
Amaury Denoyelleee7fcd52021-10-18 14:45:49 +02001586 /* FIXME wrong analogy between ext-connect and websocket, this need to
1587 * be refine.
1588 */
1589 if (flags & H2_SF_EXT_CONNECT_RCVD)
1590 cs->flags |= CS_FL_WEBSOCKET;
1591
Willy Tarreaua217df92022-02-04 09:05:37 +01001592 /* The stream will record the request's accept date (which is either the
1593 * end of the connection's or the date immediately after the previous
1594 * request) and the idle time, which is the delay since the previous
1595 * request. We can set the value now, it will be copied by stream_new().
1596 */
1597 sess->t_idle = tv_ms_elapsed(&sess->tv_accept, &now) - sess->t_handshake;
Christopher Faulet7d013e72020-12-15 16:56:50 +01001598 if (stream_create_from_cs(cs, input) < 0)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001599 goto out_free_cs;
1600
Willy Tarreau590a0512018-09-05 11:56:48 +02001601 /* We want the accept date presented to the next stream to be the one
1602 * we have now, the handshake time to be null (since the next stream
1603 * is not delayed by a handshake), and the idle time to count since
1604 * right now.
1605 */
1606 sess->accept_date = date;
1607 sess->tv_accept = now;
1608 sess->t_handshake = 0;
Willy Tarreaua217df92022-02-04 09:05:37 +01001609 sess->t_idle = 0;
Willy Tarreau590a0512018-09-05 11:56:48 +02001610
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001611 /* OK done, the stream lives its own life now */
Willy Tarreaufa1d3572019-01-31 10:31:51 +01001612 if (h2_frt_has_too_many_cs(h2c))
Willy Tarreauf2101912018-07-19 10:11:38 +02001613 h2c->flags |= H2_CF_DEM_TOOMANY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001614 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001615 return h2s;
1616
1617 out_free_cs:
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001618 h2c->nb_cs--;
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01001619 if (!h2c->nb_cs)
1620 h2c->idle_start = now_ms;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001621 cs_free(cs);
Olivier Houchard58d87f32019-05-29 16:44:17 +02001622 h2s->cs = NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001623 out_close:
Willy Tarreau71049cc2018-03-28 13:56:39 +02001624 h2s_destroy(h2s);
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001625 out_alloc:
1626 TRACE_ERROR("Failed to allocate a new stream", H2_EV_H2S_NEW|H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001627 out:
Willy Tarreau45efc072018-10-03 18:27:52 +02001628 sess_log(sess);
Willy Tarreau7838a792019-08-12 18:42:03 +02001629 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreau45efc072018-10-03 18:27:52 +02001630 return NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001631}
1632
Willy Tarreau751f2d02018-10-05 09:35:00 +02001633/* allocates a new stream associated to conn_stream <cs> on the h2c connection
1634 * and returns it, or NULL in case of memory allocation error or if the highest
1635 * possible stream ID was reached.
1636 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01001637static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001638{
1639 struct h2s *h2s = NULL;
1640
Willy Tarreau7838a792019-08-12 18:42:03 +02001641 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1642
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001643 if (h2c->nb_streams >= h2c->streams_limit) {
1644 TRACE_ERROR("Aborting stream since negotiated limit is too low", H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001645 goto out;
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001646 }
Willy Tarreau751f2d02018-10-05 09:35:00 +02001647
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001648 if (h2_streams_left(h2c) < 1) {
1649 TRACE_ERROR("Aborting stream since no more streams left", H2_EV_H2S_NEW, h2c->conn);
Willy Tarreaua80dca82019-01-24 17:08:28 +01001650 goto out;
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001651 }
Willy Tarreaua80dca82019-01-24 17:08:28 +01001652
Willy Tarreau751f2d02018-10-05 09:35:00 +02001653 /* Defer choosing the ID until we send the first message to create the stream */
1654 h2s = h2s_new(h2c, 0);
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001655 if (!h2s) {
1656 TRACE_ERROR("Failed to allocate a new stream", H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001657 goto out;
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001658 }
Willy Tarreau751f2d02018-10-05 09:35:00 +02001659
1660 h2s->cs = cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001661 h2s->sess = sess;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001662 cs->ctx = h2s;
1663 h2c->nb_cs++;
1664
Willy Tarreau751f2d02018-10-05 09:35:00 +02001665 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001666 if (likely(h2s))
1667 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
1668 else
1669 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn, h2s);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001670 return h2s;
1671}
1672
Willy Tarreaube5b7152017-09-25 16:25:39 +02001673/* try to send a settings frame on the connection. Returns > 0 on success, 0 if
1674 * it couldn't do anything. It may return an error in h2c. See RFC7540#11.3 for
1675 * the various settings codes.
1676 */
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001677static int h2c_send_settings(struct h2c *h2c)
Willy Tarreaube5b7152017-09-25 16:25:39 +02001678{
1679 struct buffer *res;
1680 char buf_data[100]; // enough for 15 settings
Willy Tarreau83061a82018-07-13 11:56:34 +02001681 struct buffer buf;
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001682 int mfs;
Willy Tarreau7838a792019-08-12 18:42:03 +02001683 int ret = 0;
1684
1685 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001686
1687 if (h2c_mux_busy(h2c, NULL)) {
1688 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001689 goto out;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001690 }
1691
Willy Tarreaube5b7152017-09-25 16:25:39 +02001692 chunk_init(&buf, buf_data, sizeof(buf_data));
1693 chunk_memcpy(&buf,
1694 "\x00\x00\x00" /* length : 0 for now */
1695 "\x04\x00" /* type : 4 (settings), flags : 0 */
1696 "\x00\x00\x00\x00", /* stream ID : 0 */
1697 9);
1698
Willy Tarreau0bbad6b2019-02-26 16:01:52 +01001699 if (h2c->flags & H2_CF_IS_BACK) {
1700 /* send settings_enable_push=0 */
1701 chunk_memcat(&buf, "\x00\x02\x00\x00\x00\x00", 6);
1702 }
1703
Amaury Denoyelle0ea2c4f2021-07-09 17:14:30 +02001704 /* rfc 8441 #3 SETTINGS_ENABLE_CONNECT_PROTOCOL=1,
1705 * sent automatically unless disabled in the global config */
1706 if (!(global.tune.options & GTUNE_DISABLE_H2_WEBSOCKET))
1707 chunk_memcat(&buf, "\x00\x08\x00\x00\x00\x01", 6);
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01001708
Willy Tarreaube5b7152017-09-25 16:25:39 +02001709 if (h2_settings_header_table_size != 4096) {
1710 char str[6] = "\x00\x01"; /* header_table_size */
1711
1712 write_n32(str + 2, h2_settings_header_table_size);
1713 chunk_memcat(&buf, str, 6);
1714 }
1715
1716 if (h2_settings_initial_window_size != 65535) {
1717 char str[6] = "\x00\x04"; /* initial_window_size */
1718
1719 write_n32(str + 2, h2_settings_initial_window_size);
1720 chunk_memcat(&buf, str, 6);
1721 }
1722
1723 if (h2_settings_max_concurrent_streams != 0) {
1724 char str[6] = "\x00\x03"; /* max_concurrent_streams */
1725
1726 /* Note: 0 means "unlimited" for haproxy's config but not for
1727 * the protocol, so never send this value!
1728 */
1729 write_n32(str + 2, h2_settings_max_concurrent_streams);
1730 chunk_memcat(&buf, str, 6);
1731 }
1732
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001733 mfs = h2_settings_max_frame_size;
1734 if (mfs > global.tune.bufsize)
1735 mfs = global.tune.bufsize;
1736
1737 if (!mfs)
1738 mfs = global.tune.bufsize;
1739
1740 if (mfs != 16384) {
Willy Tarreaube5b7152017-09-25 16:25:39 +02001741 char str[6] = "\x00\x05"; /* max_frame_size */
1742
1743 /* note: similarly we could also emit MAX_HEADER_LIST_SIZE to
1744 * match bufsize - rewrite size, but at the moment it seems
1745 * that clients don't take care of it.
1746 */
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001747 write_n32(str + 2, mfs);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001748 chunk_memcat(&buf, str, 6);
1749 }
1750
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001751 h2_set_frame_size(buf.area, buf.data - 9);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001752
1753 res = br_tail(h2c->mbuf);
1754 retry:
1755 if (!h2_get_buf(h2c, res)) {
1756 h2c->flags |= H2_CF_MUX_MALLOC;
1757 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001758 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001759 }
1760
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001761 ret = b_istput(res, ist2(buf.area, buf.data));
Willy Tarreaube5b7152017-09-25 16:25:39 +02001762 if (unlikely(ret <= 0)) {
1763 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001764 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1765 goto retry;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001766 h2c->flags |= H2_CF_MUX_MFULL;
1767 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001768 }
1769 else {
1770 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001771 ret = 0;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001772 }
1773 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001774 out:
1775 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001776 return ret;
1777}
1778
Willy Tarreau52eed752017-09-22 15:05:09 +02001779/* Try to receive a connection preface, then upon success try to send our
1780 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1781 * missing data. It may return an error in h2c.
1782 */
1783static int h2c_frt_recv_preface(struct h2c *h2c)
1784{
1785 int ret1;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001786 int ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001787
Willy Tarreau7838a792019-08-12 18:42:03 +02001788 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
1789
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001790 ret1 = b_isteq(&h2c->dbuf, 0, b_data(&h2c->dbuf), ist(H2_CONN_PREFACE));
Willy Tarreau52eed752017-09-22 15:05:09 +02001791
1792 if (unlikely(ret1 <= 0)) {
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02001793 if (!ret1)
1794 h2c->flags |= H2_CF_DEM_SHORT_READ;
Amaury Denoyellea8879232020-10-27 17:16:03 +01001795 if (ret1 < 0 || conn_xprt_read0_pending(h2c->conn)) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01001796 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 +02001797 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc23d6d12021-06-17 08:08:48 +02001798 if (b_data(&h2c->dbuf) ||
1799 !(((const struct session *)h2c->conn->owner)->fe->options & PR_O_IGNORE_PRB))
1800 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Amaury Denoyellea8879232020-10-27 17:16:03 +01001801 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001802 ret2 = 0;
1803 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02001804 }
1805
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001806 ret2 = h2c_send_settings(h2c);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001807 if (ret2 > 0)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001808 b_del(&h2c->dbuf, ret1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001809 out:
1810 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001811 return ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001812}
1813
Willy Tarreau01b44822018-10-03 14:26:37 +02001814/* Try to send a connection preface, then upon success try to send our
1815 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1816 * missing data. It may return an error in h2c.
1817 */
1818static int h2c_bck_send_preface(struct h2c *h2c)
1819{
1820 struct buffer *res;
Willy Tarreau7838a792019-08-12 18:42:03 +02001821 int ret = 0;
1822
1823 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02001824
1825 if (h2c_mux_busy(h2c, NULL)) {
1826 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001827 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001828 }
1829
Willy Tarreaubcc45952019-05-26 10:05:50 +02001830 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001831 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001832 if (!h2_get_buf(h2c, res)) {
Willy Tarreau01b44822018-10-03 14:26:37 +02001833 h2c->flags |= H2_CF_MUX_MALLOC;
1834 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001835 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001836 }
1837
1838 if (!b_data(res)) {
1839 /* preface not yet sent */
Willy Tarreau9c218e72019-05-26 10:08:28 +02001840 ret = b_istput(res, ist(H2_CONN_PREFACE));
1841 if (unlikely(ret <= 0)) {
1842 if (!ret) {
1843 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1844 goto retry;
1845 h2c->flags |= H2_CF_MUX_MFULL;
1846 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001847 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001848 }
1849 else {
1850 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001851 ret = 0;
1852 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001853 }
1854 }
Willy Tarreau01b44822018-10-03 14:26:37 +02001855 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001856 ret = h2c_send_settings(h2c);
1857 out:
1858 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
1859 return ret;
Willy Tarreau01b44822018-10-03 14:26:37 +02001860}
1861
Willy Tarreau081d4722017-05-16 21:51:05 +02001862/* try to send a GOAWAY frame on the connection to report an error or a graceful
1863 * shutdown, with h2c->errcode as the error code. Returns > 0 on success or zero
1864 * if nothing was done. It uses h2c->last_sid as the advertised ID, or copies it
1865 * from h2c->max_id if it's not set yet (<0). In case of lack of room to write
1866 * the message, it subscribes the requester (either <h2s> or <h2c>) to future
1867 * notifications. It sets H2_CF_GOAWAY_SENT on success, and H2_CF_GOAWAY_FAILED
1868 * on unrecoverable failure. It will not attempt to send one again in this last
Willy Tarreauec26f622022-04-13 09:40:52 +02001869 * case, nor will it send one if settings were not sent (e.g. still waiting for
1870 * a preface) so that it is safe to use h2c_error() to report such errors.
Willy Tarreau081d4722017-05-16 21:51:05 +02001871 */
1872static int h2c_send_goaway_error(struct h2c *h2c, struct h2s *h2s)
1873{
1874 struct buffer *res;
1875 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02001876 int ret = 0;
Willy Tarreau081d4722017-05-16 21:51:05 +02001877
Willy Tarreau7838a792019-08-12 18:42:03 +02001878 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
1879
Willy Tarreauec26f622022-04-13 09:40:52 +02001880 if ((h2c->flags & H2_CF_GOAWAY_FAILED) || h2c->st0 < H2_CS_SETTINGS1) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001881 ret = 1; // claim that it worked
1882 goto out;
1883 }
Willy Tarreau081d4722017-05-16 21:51:05 +02001884
1885 if (h2c_mux_busy(h2c, h2s)) {
1886 if (h2s)
1887 h2s->flags |= H2_SF_BLK_MBUSY;
1888 else
1889 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001890 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001891 }
1892
Willy Tarreau9c218e72019-05-26 10:08:28 +02001893 /* len: 8, type: 7, flags: none, sid: 0 */
1894 memcpy(str, "\x00\x00\x08\x07\x00\x00\x00\x00\x00", 9);
1895
1896 if (h2c->last_sid < 0)
1897 h2c->last_sid = h2c->max_id;
1898
1899 write_n32(str + 9, h2c->last_sid);
1900 write_n32(str + 13, h2c->errcode);
1901
Willy Tarreaubcc45952019-05-26 10:05:50 +02001902 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001903 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001904 if (!h2_get_buf(h2c, res)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02001905 h2c->flags |= H2_CF_MUX_MALLOC;
1906 if (h2s)
1907 h2s->flags |= H2_SF_BLK_MROOM;
1908 else
1909 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001910 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001911 }
1912
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001913 ret = b_istput(res, ist2(str, 17));
Willy Tarreau081d4722017-05-16 21:51:05 +02001914 if (unlikely(ret <= 0)) {
1915 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001916 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1917 goto retry;
Willy Tarreau081d4722017-05-16 21:51:05 +02001918 h2c->flags |= H2_CF_MUX_MFULL;
1919 if (h2s)
1920 h2s->flags |= H2_SF_BLK_MROOM;
1921 else
1922 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001923 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001924 }
1925 else {
1926 /* we cannot report this error using GOAWAY, so we mark
1927 * it and claim a success.
1928 */
1929 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1930 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau7838a792019-08-12 18:42:03 +02001931 ret = 1;
1932 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001933 }
1934 }
1935 h2c->flags |= H2_CF_GOAWAY_SENT;
Willy Tarreauf965b2a2020-12-01 10:47:18 +01001936
1937 /* some codes are not for real errors, just attempts to close cleanly */
1938 switch (h2c->errcode) {
1939 case H2_ERR_NO_ERROR:
1940 case H2_ERR_ENHANCE_YOUR_CALM:
1941 case H2_ERR_REFUSED_STREAM:
1942 case H2_ERR_CANCEL:
1943 break;
1944 default:
Willy Tarreau4781b152021-04-06 13:53:36 +02001945 HA_ATOMIC_INC(&h2c->px_counters->goaway_resp);
Willy Tarreauf965b2a2020-12-01 10:47:18 +01001946 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001947 out:
1948 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
Willy Tarreau081d4722017-05-16 21:51:05 +02001949 return ret;
1950}
1951
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001952/* Try to send an RST_STREAM frame on the connection for the indicated stream
1953 * during mux operations. This stream must be valid and cannot be closed
1954 * already. h2s->id will be used for the stream ID and h2s->errcode will be
1955 * used for the error code. h2s->st will be update to H2_SS_CLOSED if it was
1956 * not yet.
1957 *
1958 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1959 * to write the message, it subscribes the stream to future notifications.
1960 */
1961static int h2s_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1962{
1963 struct buffer *res;
1964 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001965 int ret = 0;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001966
Willy Tarreau7838a792019-08-12 18:42:03 +02001967 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
1968
1969 if (!h2s || h2s->st == H2_SS_CLOSED) {
1970 ret = 1;
1971 goto out;
1972 }
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001973
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 */
Willy Tarreau231f6162019-08-06 10:01:40 +02001977 if (h2c->dsi == h2s->id && h2c->dft == H2_FT_RST_STREAM) {
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001978 ret = 1;
1979 goto ignore;
1980 }
1981
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001982 if (h2c_mux_busy(h2c, h2s)) {
1983 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001984 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001985 }
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 write_n32(str + 5, h2s->id);
1990 write_n32(str + 9, h2s->errcode);
1991
Willy Tarreaubcc45952019-05-26 10:05:50 +02001992 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001993 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001994 if (!h2_get_buf(h2c, res)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001995 h2c->flags |= H2_CF_MUX_MALLOC;
1996 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001997 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001998 }
1999
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002000 ret = b_istput(res, ist2(str, 13));
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002001 if (unlikely(ret <= 0)) {
2002 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002003 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2004 goto retry;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002005 h2c->flags |= H2_CF_MUX_MFULL;
2006 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002007 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002008 }
2009 else {
2010 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002011 ret = 0;
2012 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002013 }
2014 }
2015
Willy Tarreau8adae7c2018-03-22 17:37:05 +01002016 ignore:
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002017 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01002018 h2s_close(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002019 out:
2020 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002021 return ret;
2022}
2023
2024/* Try to send an RST_STREAM frame on the connection for the stream being
2025 * demuxed using h2c->dsi for the stream ID. It will use h2s->errcode as the
Willy Tarreaue6888ff2018-12-23 18:26:26 +01002026 * error code, even if the stream is one of the dummy ones, and will update
2027 * h2s->st to H2_SS_CLOSED if it was not yet.
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002028 *
2029 * Returns > 0 on success or zero if nothing was done. In case of lack of room
2030 * to write the message, it blocks the demuxer and subscribes it to future
Joseph Herlantd77575d2018-11-25 10:54:45 -08002031 * notifications. It's worth mentioning that an RST may even be sent for a
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002032 * closed stream.
Willy Tarreau27a84c92017-10-17 08:10:17 +02002033 */
2034static int h2c_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
2035{
2036 struct buffer *res;
2037 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002038 int ret = 0;
2039
2040 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02002041
Willy Tarreau8adae7c2018-03-22 17:37:05 +01002042 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
2043 * RST_STREAM in response to a RST_STREAM frame.
2044 */
2045 if (h2c->dft == H2_FT_RST_STREAM) {
2046 ret = 1;
2047 goto ignore;
2048 }
2049
Willy Tarreau27a84c92017-10-17 08:10:17 +02002050 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002051 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002052 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002053 }
2054
Willy Tarreau9c218e72019-05-26 10:08:28 +02002055 /* len: 4, type: 3, flags: none */
2056 memcpy(str, "\x00\x00\x04\x03\x00", 5);
2057
2058 write_n32(str + 5, h2c->dsi);
2059 write_n32(str + 9, h2s->errcode);
2060
Willy Tarreaubcc45952019-05-26 10:05:50 +02002061 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002062 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002063 if (!h2_get_buf(h2c, res)) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02002064 h2c->flags |= H2_CF_MUX_MALLOC;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002065 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002066 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002067 }
2068
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002069 ret = b_istput(res, ist2(str, 13));
Willy Tarreau27a84c92017-10-17 08:10:17 +02002070 if (unlikely(ret <= 0)) {
2071 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002072 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2073 goto retry;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002074 h2c->flags |= H2_CF_MUX_MFULL;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002075 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002076 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002077 }
2078 else {
2079 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002080 ret = 0;
2081 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002082 }
2083 }
2084
Willy Tarreau8adae7c2018-03-22 17:37:05 +01002085 ignore:
Willy Tarreauab0e1da2018-10-05 10:16:37 +02002086 if (h2s->id) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02002087 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01002088 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002089 }
2090
Willy Tarreau7838a792019-08-12 18:42:03 +02002091 out:
Willy Tarreau4781b152021-04-06 13:53:36 +02002092 HA_ATOMIC_INC(&h2c->px_counters->rst_stream_resp);
Willy Tarreau7838a792019-08-12 18:42:03 +02002093 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02002094 return ret;
2095}
2096
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002097/* try to send an empty DATA frame with the ES flag set to notify about the
2098 * end of stream and match a shutdown(write). If an ES was already sent as
2099 * indicated by HLOC/ERROR/RESET/CLOSED states, nothing is done. Returns > 0
2100 * on success or zero if nothing was done. In case of lack of room to write the
2101 * message, it subscribes the requesting stream to future notifications.
2102 */
2103static int h2_send_empty_data_es(struct h2s *h2s)
2104{
2105 struct h2c *h2c = h2s->h2c;
2106 struct buffer *res;
2107 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002108 int ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002109
Willy Tarreau7838a792019-08-12 18:42:03 +02002110 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
2111
2112 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED) {
2113 ret = 1;
2114 goto out;
2115 }
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002116
2117 if (h2c_mux_busy(h2c, h2s)) {
2118 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002119 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002120 }
2121
Willy Tarreau9c218e72019-05-26 10:08:28 +02002122 /* len: 0x000000, type: 0(DATA), flags: ES=1 */
2123 memcpy(str, "\x00\x00\x00\x00\x01", 5);
2124 write_n32(str + 5, h2s->id);
2125
Willy Tarreaubcc45952019-05-26 10:05:50 +02002126 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002127 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002128 if (!h2_get_buf(h2c, res)) {
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002129 h2c->flags |= H2_CF_MUX_MALLOC;
2130 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002131 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002132 }
2133
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002134 ret = b_istput(res, ist2(str, 9));
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002135 if (likely(ret > 0)) {
2136 h2s->flags |= H2_SF_ES_SENT;
2137 }
2138 else if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002139 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2140 goto retry;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002141 h2c->flags |= H2_CF_MUX_MFULL;
2142 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002143 }
2144 else {
2145 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002146 ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002147 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002148 out:
2149 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002150 return ret;
2151}
2152
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05002153/* wake a specific stream and assign its conn_stream some CS_FL_* flags among
Willy Tarreau99ad1b32019-05-14 11:46:28 +02002154 * CS_FL_ERR_PENDING and CS_FL_ERROR if needed. The stream's state
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002155 * is automatically updated accordingly. If the stream is orphaned, it is
2156 * destroyed.
Christopher Fauletf02ca002019-03-07 16:21:34 +01002157 */
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002158static void h2s_wake_one_stream(struct h2s *h2s)
Christopher Fauletf02ca002019-03-07 16:21:34 +01002159{
Willy Tarreau7838a792019-08-12 18:42:03 +02002160 struct h2c *h2c = h2s->h2c;
2161
2162 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn, h2s);
2163
Christopher Fauletf02ca002019-03-07 16:21:34 +01002164 if (!h2s->cs) {
2165 /* this stream was already orphaned */
2166 h2s_destroy(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002167 TRACE_DEVEL("leaving with no h2s", H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002168 return;
2169 }
2170
Christopher Fauletaade4ed2020-10-08 15:38:41 +02002171 if (h2c_read0_pending(h2s->h2c)) {
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002172 if (h2s->st == H2_SS_OPEN)
2173 h2s->st = H2_SS_HREM;
2174 else if (h2s->st == H2_SS_HLOC)
2175 h2s_close(h2s);
2176 }
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002177
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002178 if ((h2s->h2c->st0 >= H2_CS_ERROR || h2s->h2c->conn->flags & CO_FL_ERROR) ||
2179 (h2s->h2c->last_sid > 0 && (!h2s->id || h2s->id > h2s->h2c->last_sid))) {
2180 h2s->cs->flags |= CS_FL_ERR_PENDING;
2181 if (h2s->cs->flags & CS_FL_EOS)
2182 h2s->cs->flags |= CS_FL_ERROR;
Willy Tarreau23482912019-05-07 15:23:14 +02002183
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002184 if (h2s->st < H2_SS_ERROR)
2185 h2s->st = H2_SS_ERROR;
2186 }
Christopher Fauletf02ca002019-03-07 16:21:34 +01002187
2188 h2s_alert(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002189 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002190}
2191
2192/* wake the streams attached to the connection, whose id is greater than <last>
2193 * or unassigned.
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002194 */
Willy Tarreau23482912019-05-07 15:23:14 +02002195static void h2_wake_some_streams(struct h2c *h2c, int last)
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002196{
2197 struct eb32_node *node;
2198 struct h2s *h2s;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002199
Willy Tarreau7838a792019-08-12 18:42:03 +02002200 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn);
2201
Christopher Fauletf02ca002019-03-07 16:21:34 +01002202 /* Wake all streams with ID > last */
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002203 node = eb32_lookup_ge(&h2c->streams_by_id, last + 1);
2204 while (node) {
2205 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002206 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002207 h2s_wake_one_stream(h2s);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002208 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01002209
Christopher Fauletf02ca002019-03-07 16:21:34 +01002210 /* Wake all streams with unassigned ID (ID == 0) */
2211 node = eb32_lookup(&h2c->streams_by_id, 0);
2212 while (node) {
2213 h2s = container_of(node, struct h2s, by_id);
2214 if (h2s->id > 0)
2215 break;
2216 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002217 h2s_wake_one_stream(h2s);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002218 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002219
2220 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002221}
2222
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002223/* Wake up all blocked streams whose window size has become positive after the
2224 * mux's initial window was adjusted. This should be done after having processed
2225 * SETTINGS frames which have updated the mux's initial window size.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002226 */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002227static void h2c_unblock_sfctl(struct h2c *h2c)
Willy Tarreau3421aba2017-07-27 15:41:03 +02002228{
2229 struct h2s *h2s;
2230 struct eb32_node *node;
2231
Willy Tarreau7838a792019-08-12 18:42:03 +02002232 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
2233
Willy Tarreau3421aba2017-07-27 15:41:03 +02002234 node = eb32_first(&h2c->streams_by_id);
2235 while (node) {
2236 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002237 if (h2s->flags & H2_SF_BLK_SFCTL && h2s_mws(h2s) > 0) {
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002238 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002239 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002240 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2241 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreau2b718102021-04-21 07:32:39 +02002242 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002243 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002244 node = eb32_next(node);
2245 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002246
2247 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002248}
2249
2250/* processes a SETTINGS frame whose payload is <payload> for <plen> bytes, and
2251 * ACKs it if needed. Returns > 0 on success or zero on missing data. It may
Willy Tarreaub860c732019-01-30 15:39:55 +01002252 * return an error in h2c. The caller must have already verified frame length
2253 * and stream ID validity. Described in RFC7540#6.5.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002254 */
2255static int h2c_handle_settings(struct h2c *h2c)
2256{
2257 unsigned int offset;
2258 int error;
2259
Willy Tarreau7838a792019-08-12 18:42:03 +02002260 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
2261
Willy Tarreau3421aba2017-07-27 15:41:03 +02002262 if (h2c->dff & H2_F_SETTINGS_ACK) {
2263 if (h2c->dfl) {
2264 error = H2_ERR_FRAME_SIZE_ERROR;
2265 goto fail;
2266 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002267 goto done;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002268 }
2269
Willy Tarreau3421aba2017-07-27 15:41:03 +02002270 /* process full frame only */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002271 if (b_data(&h2c->dbuf) < h2c->dfl) {
2272 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002273 goto out0;
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002274 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002275
2276 /* parse the frame */
2277 for (offset = 0; offset < h2c->dfl; offset += 6) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002278 uint16_t type = h2_get_n16(&h2c->dbuf, offset);
2279 int32_t arg = h2_get_n32(&h2c->dbuf, offset + 2);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002280
2281 switch (type) {
2282 case H2_SETTINGS_INITIAL_WINDOW_SIZE:
2283 /* we need to update all existing streams with the
2284 * difference from the previous iws.
2285 */
2286 if (arg < 0) { // RFC7540#6.5.2
2287 error = H2_ERR_FLOW_CONTROL_ERROR;
2288 goto fail;
2289 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002290 h2c->miw = arg;
2291 break;
2292 case H2_SETTINGS_MAX_FRAME_SIZE:
2293 if (arg < 16384 || arg > 16777215) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002294 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 +02002295 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002296 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002297 goto fail;
2298 }
2299 h2c->mfs = arg;
2300 break;
Willy Tarreau8a4dca02022-01-13 16:00:12 +01002301 case H2_SETTINGS_HEADER_TABLE_SIZE:
2302 h2c->flags |= H2_CF_SHTS_UPDATED;
2303 break;
Willy Tarreau1b38b462017-12-03 19:02:28 +01002304 case H2_SETTINGS_ENABLE_PUSH:
2305 if (arg < 0 || arg > 1) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002306 TRACE_ERROR("ENABLE_PUSH out of range", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002307 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002308 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002309 goto fail;
2310 }
2311 break;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01002312 case H2_SETTINGS_MAX_CONCURRENT_STREAMS:
2313 if (h2c->flags & H2_CF_IS_BACK) {
2314 /* the limit is only for the backend; for the frontend it is our limit */
2315 if ((unsigned int)arg > h2_settings_max_concurrent_streams)
2316 arg = h2_settings_max_concurrent_streams;
2317 h2c->streams_limit = arg;
2318 }
2319 break;
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01002320 case H2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
Amaury Denoyelle68993a12021-10-18 09:43:29 +02002321 if (arg == 1)
2322 h2c->flags |= H2_CF_RCVD_RFC8441;
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01002323 break;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002324 }
2325 }
2326
2327 /* need to ACK this frame now */
2328 h2c->st0 = H2_CS_FRAME_A;
Willy Tarreau7838a792019-08-12 18:42:03 +02002329 done:
2330 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002331 return 1;
2332 fail:
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002333 if (!(h2c->flags & H2_CF_IS_BACK))
2334 sess_log(h2c->conn->owner);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002335 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002336 out0:
2337 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 +02002338 return 0;
2339}
2340
2341/* try to send an ACK for a settings frame on the connection. Returns > 0 on
2342 * success or one of the h2_status values.
2343 */
2344static int h2c_ack_settings(struct h2c *h2c)
2345{
2346 struct buffer *res;
2347 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002348 int ret = 0;
2349
2350 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002351
2352 if (h2c_mux_busy(h2c, NULL)) {
2353 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002354 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002355 }
2356
Willy Tarreau9c218e72019-05-26 10:08:28 +02002357 memcpy(str,
2358 "\x00\x00\x00" /* length : 0 (no data) */
2359 "\x04" "\x01" /* type : 4, flags : ACK */
2360 "\x00\x00\x00\x00" /* stream ID */, 9);
2361
Willy Tarreaubcc45952019-05-26 10:05:50 +02002362 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002363 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002364 if (!h2_get_buf(h2c, res)) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02002365 h2c->flags |= H2_CF_MUX_MALLOC;
2366 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002367 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002368 }
2369
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002370 ret = b_istput(res, ist2(str, 9));
Willy Tarreau3421aba2017-07-27 15:41:03 +02002371 if (unlikely(ret <= 0)) {
2372 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002373 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2374 goto retry;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002375 h2c->flags |= H2_CF_MUX_MFULL;
2376 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002377 }
2378 else {
2379 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002380 ret = 0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002381 }
2382 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002383 out:
2384 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002385 return ret;
2386}
2387
Willy Tarreaucf68c782017-10-10 17:11:41 +02002388/* processes a PING frame and schedules an ACK if needed. The caller must pass
2389 * the pointer to the payload in <payload>. Returns > 0 on success or zero on
Willy Tarreaub860c732019-01-30 15:39:55 +01002390 * missing data. The caller must have already verified frame length
2391 * and stream ID validity.
Willy Tarreaucf68c782017-10-10 17:11:41 +02002392 */
2393static int h2c_handle_ping(struct h2c *h2c)
2394{
Willy Tarreaucf68c782017-10-10 17:11:41 +02002395 /* schedule a response */
Willy Tarreau68ed6412017-12-03 18:15:56 +01002396 if (!(h2c->dff & H2_F_PING_ACK))
Willy Tarreaucf68c782017-10-10 17:11:41 +02002397 h2c->st0 = H2_CS_FRAME_A;
2398 return 1;
2399}
2400
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002401/* Try to send a window update for stream id <sid> and value <increment>.
2402 * Returns > 0 on success or zero on missing room or failure. It may return an
2403 * error in h2c.
2404 */
2405static int h2c_send_window_update(struct h2c *h2c, int sid, uint32_t increment)
2406{
2407 struct buffer *res;
2408 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002409 int ret = 0;
2410
2411 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002412
2413 if (h2c_mux_busy(h2c, NULL)) {
2414 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002415 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002416 }
2417
Willy Tarreau9c218e72019-05-26 10:08:28 +02002418 /* length: 4, type: 8, flags: none */
2419 memcpy(str, "\x00\x00\x04\x08\x00", 5);
2420 write_n32(str + 5, sid);
2421 write_n32(str + 9, increment);
2422
Willy Tarreaubcc45952019-05-26 10:05:50 +02002423 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002424 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002425 if (!h2_get_buf(h2c, res)) {
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002426 h2c->flags |= H2_CF_MUX_MALLOC;
2427 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002428 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002429 }
2430
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002431 ret = b_istput(res, ist2(str, 13));
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002432 if (unlikely(ret <= 0)) {
2433 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002434 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2435 goto retry;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002436 h2c->flags |= H2_CF_MUX_MFULL;
2437 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002438 }
2439 else {
2440 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002441 ret = 0;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002442 }
2443 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002444 out:
2445 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002446 return ret;
2447}
2448
2449/* try to send pending window update for the connection. It's safe to call it
2450 * with no pending updates. Returns > 0 on success or zero on missing room or
2451 * failure. It may return an error in h2c.
2452 */
2453static int h2c_send_conn_wu(struct h2c *h2c)
2454{
2455 int ret = 1;
2456
Willy Tarreau7838a792019-08-12 18:42:03 +02002457 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2458
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002459 if (h2c->rcvd_c <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002460 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002461
Willy Tarreau97aaa672018-12-23 09:49:04 +01002462 if (!(h2c->flags & H2_CF_WINDOW_OPENED)) {
2463 /* increase the advertised connection window to 2G on
2464 * first update.
2465 */
2466 h2c->flags |= H2_CF_WINDOW_OPENED;
2467 h2c->rcvd_c += H2_INITIAL_WINDOW_INCREMENT;
2468 }
2469
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002470 /* send WU for the connection */
2471 ret = h2c_send_window_update(h2c, 0, h2c->rcvd_c);
2472 if (ret > 0)
2473 h2c->rcvd_c = 0;
2474
Willy Tarreau7838a792019-08-12 18:42:03 +02002475 out:
2476 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002477 return ret;
2478}
2479
2480/* try to send pending window update for the current dmux stream. It's safe to
2481 * call it with no pending updates. Returns > 0 on success or zero on missing
2482 * room or failure. It may return an error in h2c.
2483 */
2484static int h2c_send_strm_wu(struct h2c *h2c)
2485{
2486 int ret = 1;
2487
Willy Tarreau7838a792019-08-12 18:42:03 +02002488 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2489
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002490 if (h2c->rcvd_s <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002491 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002492
2493 /* send WU for the stream */
2494 ret = h2c_send_window_update(h2c, h2c->dsi, h2c->rcvd_s);
2495 if (ret > 0)
2496 h2c->rcvd_s = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002497 out:
2498 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002499 return ret;
2500}
2501
Willy Tarreaucf68c782017-10-10 17:11:41 +02002502/* try to send an ACK for a ping frame on the connection. Returns > 0 on
2503 * success, 0 on missing data or one of the h2_status values.
2504 */
2505static int h2c_ack_ping(struct h2c *h2c)
2506{
2507 struct buffer *res;
2508 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02002509 int ret = 0;
2510
2511 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002512
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002513 if (b_data(&h2c->dbuf) < 8)
Willy Tarreau7838a792019-08-12 18:42:03 +02002514 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002515
2516 if (h2c_mux_busy(h2c, NULL)) {
2517 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002518 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002519 }
2520
Willy Tarreaucf68c782017-10-10 17:11:41 +02002521 memcpy(str,
2522 "\x00\x00\x08" /* length : 8 (same payload) */
2523 "\x06" "\x01" /* type : 6, flags : ACK */
2524 "\x00\x00\x00\x00" /* stream ID */, 9);
2525
2526 /* copy the original payload */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002527 h2_get_buf_bytes(str + 9, 8, &h2c->dbuf, 0);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002528
Willy Tarreau9c218e72019-05-26 10:08:28 +02002529 res = br_tail(h2c->mbuf);
2530 retry:
2531 if (!h2_get_buf(h2c, res)) {
2532 h2c->flags |= H2_CF_MUX_MALLOC;
2533 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002534 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02002535 }
2536
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002537 ret = b_istput(res, ist2(str, 17));
Willy Tarreaucf68c782017-10-10 17:11:41 +02002538 if (unlikely(ret <= 0)) {
2539 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002540 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2541 goto retry;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002542 h2c->flags |= H2_CF_MUX_MFULL;
2543 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002544 }
2545 else {
2546 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002547 ret = 0;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002548 }
2549 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002550 out:
2551 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002552 return ret;
2553}
2554
Willy Tarreau26f95952017-07-27 17:18:30 +02002555/* processes a WINDOW_UPDATE frame whose payload is <payload> for <plen> bytes.
2556 * Returns > 0 on success or zero on missing data. It may return an error in
Willy Tarreaub860c732019-01-30 15:39:55 +01002557 * h2c or h2s. The caller must have already verified frame length and stream ID
2558 * validity. Described in RFC7540#6.9.
Willy Tarreau26f95952017-07-27 17:18:30 +02002559 */
2560static int h2c_handle_window_update(struct h2c *h2c, struct h2s *h2s)
2561{
2562 int32_t inc;
2563 int error;
2564
Willy Tarreau7838a792019-08-12 18:42:03 +02002565 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
2566
Willy Tarreau26f95952017-07-27 17:18:30 +02002567 /* process full frame only */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002568 if (b_data(&h2c->dbuf) < h2c->dfl) {
2569 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002570 goto out0;
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002571 }
Willy Tarreau26f95952017-07-27 17:18:30 +02002572
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002573 inc = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau26f95952017-07-27 17:18:30 +02002574
2575 if (h2c->dsi != 0) {
2576 /* stream window update */
Willy Tarreau26f95952017-07-27 17:18:30 +02002577
2578 /* it's not an error to receive WU on a closed stream */
2579 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau7838a792019-08-12 18:42:03 +02002580 goto done;
Willy Tarreau26f95952017-07-27 17:18:30 +02002581
2582 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002583 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 +02002584 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002585 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002586 goto strm_err;
2587 }
2588
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002589 if (h2s_mws(h2s) >= 0 && h2s_mws(h2s) + inc < 0) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002590 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 +02002591 error = H2_ERR_FLOW_CONTROL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002592 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002593 goto strm_err;
2594 }
2595
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002596 h2s->sws += inc;
2597 if (h2s_mws(h2s) > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002598 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002599 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002600 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2601 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreau2b718102021-04-21 07:32:39 +02002602 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreau26f95952017-07-27 17:18:30 +02002603 }
2604 }
2605 else {
2606 /* connection window update */
2607 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002608 TRACE_ERROR("conn WINDOW_UPDATE inc=0", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002609 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002610 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002611 goto conn_err;
2612 }
2613
2614 if (h2c->mws >= 0 && h2c->mws + inc < 0) {
2615 error = H2_ERR_FLOW_CONTROL_ERROR;
2616 goto conn_err;
2617 }
2618
2619 h2c->mws += inc;
2620 }
2621
Willy Tarreau7838a792019-08-12 18:42:03 +02002622 done:
2623 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002624 return 1;
2625
2626 conn_err:
2627 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002628 out0:
2629 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 +02002630 return 0;
2631
2632 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002633 h2s_error(h2s, error);
2634 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002635 TRACE_DEVEL("leaving on stream error", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002636 return 0;
2637}
2638
Willy Tarreaue96b0922017-10-30 00:28:29 +01002639/* processes a GOAWAY frame, and signals all streams whose ID is greater than
Willy Tarreaub860c732019-01-30 15:39:55 +01002640 * the last ID. Returns > 0 on success or zero on missing data. The caller must
2641 * have already verified frame length and stream ID validity. Described in
2642 * RFC7540#6.8.
Willy Tarreaue96b0922017-10-30 00:28:29 +01002643 */
2644static int h2c_handle_goaway(struct h2c *h2c)
2645{
Willy Tarreaue96b0922017-10-30 00:28:29 +01002646 int last;
2647
Willy Tarreau7838a792019-08-12 18:42:03 +02002648 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002649 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002650 if (b_data(&h2c->dbuf) < h2c->dfl) {
2651 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002652 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002653 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002654 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01002655
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002656 last = h2_get_n32(&h2c->dbuf, 0);
2657 h2c->errcode = h2_get_n32(&h2c->dbuf, 4);
Willy Tarreau11cc2d62017-12-03 10:27:47 +01002658 if (h2c->last_sid < 0)
2659 h2c->last_sid = last;
Willy Tarreau23482912019-05-07 15:23:14 +02002660 h2_wake_some_streams(h2c, last);
Willy Tarreau7838a792019-08-12 18:42:03 +02002661 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002662 return 1;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002663}
2664
Willy Tarreau92153fc2017-12-03 19:46:19 +01002665/* processes a PRIORITY frame, and either skips it or rejects if it is
Willy Tarreaub860c732019-01-30 15:39:55 +01002666 * invalid. Returns > 0 on success or zero on missing data. It may return an
2667 * error in h2c. The caller must have already verified frame length and stream
2668 * ID validity. Described in RFC7540#6.3.
Willy Tarreau92153fc2017-12-03 19:46:19 +01002669 */
2670static int h2c_handle_priority(struct h2c *h2c)
2671{
Willy Tarreau7838a792019-08-12 18:42:03 +02002672 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
2673
Willy Tarreau92153fc2017-12-03 19:46:19 +01002674 /* process full frame only */
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002675 if (b_data(&h2c->dbuf) < h2c->dfl) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002676 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002677 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002678 return 0;
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002679 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01002680
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002681 if (h2_get_n32(&h2c->dbuf, 0) == h2c->dsi) {
Willy Tarreau92153fc2017-12-03 19:46:19 +01002682 /* 7540#5.3 : can't depend on itself */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002683 TRACE_ERROR("PRIORITY depends on itself", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002684 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02002685 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002686 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002687 return 0;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002688 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002689 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002690 return 1;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002691}
2692
Willy Tarreaucd234e92017-08-18 10:59:39 +02002693/* processes an RST_STREAM frame, and sets the 32-bit error code on the stream.
Willy Tarreaub860c732019-01-30 15:39:55 +01002694 * Returns > 0 on success or zero on missing data. The caller must have already
2695 * verified frame length and stream ID validity. Described in RFC7540#6.4.
Willy Tarreaucd234e92017-08-18 10:59:39 +02002696 */
2697static int h2c_handle_rst_stream(struct h2c *h2c, struct h2s *h2s)
2698{
Willy Tarreau7838a792019-08-12 18:42:03 +02002699 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
2700
Willy Tarreaucd234e92017-08-18 10:59:39 +02002701 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002702 if (b_data(&h2c->dbuf) < h2c->dfl) {
2703 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002704 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002705 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002706 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002707
2708 /* late RST, already handled */
Willy Tarreau7838a792019-08-12 18:42:03 +02002709 if (h2s->st == H2_SS_CLOSED) {
2710 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 +02002711 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002712 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002713
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002714 h2s->errcode = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau00dd0782018-03-01 16:31:34 +01002715 h2s_close(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002716
2717 if (h2s->cs) {
Willy Tarreauec988c72018-12-19 18:00:29 +01002718 cs_set_error(h2s->cs);
Willy Tarreauf830f012018-12-19 17:44:55 +01002719 h2s_alert(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002720 }
2721
2722 h2s->flags |= H2_SF_RST_RCVD;
Willy Tarreau7838a792019-08-12 18:42:03 +02002723 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002724 return 1;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002725}
2726
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002727/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2728 * It may return an error in h2c or h2s. The caller must consider that the
2729 * return value is the new h2s in case one was allocated (most common case).
2730 * Described in RFC7540#6.2. Most of the
Willy Tarreau13278b42017-10-13 19:23:14 +02002731 * errors here are reported as connection errors since it's impossible to
2732 * recover from such errors after the compression context has been altered.
2733 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002734static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau13278b42017-10-13 19:23:14 +02002735{
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002736 struct buffer rxbuf = BUF_NULL;
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002737 unsigned long long body_len = 0;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002738 uint32_t flags = 0;
Willy Tarreau13278b42017-10-13 19:23:14 +02002739 int error;
2740
Willy Tarreau7838a792019-08-12 18:42:03 +02002741 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2742
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002743 if (!b_size(&h2c->dbuf)) {
2744 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002745 goto out; // empty buffer
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002746 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002747
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002748 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2749 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002750 goto out; // incomplete frame
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002751 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002752
2753 /* now either the frame is complete or the buffer is complete */
2754 if (h2s->st != H2_SS_IDLE) {
Willy Tarreau88d138e2019-01-02 19:38:14 +01002755 /* The stream exists/existed, this must be a trailers frame */
2756 if (h2s->st != H2_SS_CLOSED) {
Amaury Denoyelle74162742020-12-11 17:53:05 +01002757 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &body_len, NULL);
Willy Tarreauaab1a602019-05-06 11:12:18 +02002758 /* unrecoverable error ? */
2759 if (h2c->st0 >= H2_CS_ERROR)
2760 goto out;
2761
Christopher Faulet0de3f552021-10-08 08:56:00 +02002762 if (error == 0) {
2763 /* Demux not blocked because of the stream, it is an incomplete frame */
2764 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2765 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002766 goto out; // missing data
Christopher Faulet0de3f552021-10-08 08:56:00 +02002767 }
Willy Tarreauaab1a602019-05-06 11:12:18 +02002768
2769 if (error < 0) {
2770 /* Failed to decode this frame (e.g. too large request)
2771 * but the HPACK decompressor is still synchronized.
2772 */
2773 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
2774 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau88d138e2019-01-02 19:38:14 +01002775 goto out;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002776 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01002777 goto done;
2778 }
Willy Tarreau1f035502019-01-30 11:44:07 +01002779 /* the connection was already killed by an RST, let's consume
2780 * the data and send another RST.
2781 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01002782 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Willy Tarreau1f035502019-01-30 11:44:07 +01002783 h2s = (struct h2s*)h2_error_stream;
2784 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002785 }
2786 else if (h2c->dsi <= h2c->max_id || !(h2c->dsi & 1)) {
2787 /* RFC7540#5.1.1 stream id > prev ones, and must be odd here */
2788 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002789 TRACE_ERROR("HEADERS on invalid stream ID", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau4781b152021-04-06 13:53:36 +02002790 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau22de8d32018-09-05 19:55:58 +02002791 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02002792 goto conn_err;
2793 }
Willy Tarreau415b1ee2019-01-02 13:59:43 +01002794 else if (h2c->flags & H2_CF_DEM_TOOMANY)
2795 goto out; // IDLE but too many cs still present
Willy Tarreau13278b42017-10-13 19:23:14 +02002796
Amaury Denoyelle74162742020-12-11 17:53:05 +01002797 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002798
Willy Tarreau25919232019-01-03 14:48:18 +01002799 /* unrecoverable error ? */
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002800 if (h2c->st0 >= H2_CS_ERROR)
2801 goto out;
2802
Willy Tarreau25919232019-01-03 14:48:18 +01002803 if (error <= 0) {
Christopher Faulet0de3f552021-10-08 08:56:00 +02002804 if (error == 0) {
2805 /* Demux not blocked because of the stream, it is an incomplete frame */
2806 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2807 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau25919232019-01-03 14:48:18 +01002808 goto out; // missing data
Christopher Faulet0de3f552021-10-08 08:56:00 +02002809 }
Willy Tarreau25919232019-01-03 14:48:18 +01002810
2811 /* Failed to decode this stream (e.g. too large request)
2812 * but the HPACK decompressor is still synchronized.
2813 */
2814 h2s = (struct h2s*)h2_error_stream;
2815 goto send_rst;
2816 }
2817
Willy Tarreau3c10d512021-06-17 08:29:14 +02002818 TRACE_USER("rcvd H2 request ", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW, h2c->conn, 0, &rxbuf);
2819
Willy Tarreauca45e442022-05-12 09:08:51 +02002820 /* Now we cannot roll back and we won't come back here anymore for this
2821 * stream, this stream ID is open.
2822 */
2823 if (h2c->dsi > h2c->max_id)
2824 h2c->max_id = h2c->dsi;
2825
Willy Tarreau22de8d32018-09-05 19:55:58 +02002826 /* Note: we don't emit any other logs below because ff we return
Willy Tarreaua8e49542018-10-03 18:53:55 +02002827 * positively from h2c_frt_stream_new(), the stream will report the error,
2828 * and if we return in error, h2c_frt_stream_new() will emit the error.
Christopher Faulet7d013e72020-12-15 16:56:50 +01002829 *
2830 * Xfer the rxbuf to the stream. On success, the new stream owns the
2831 * rxbuf. On error, it is released here.
Willy Tarreau22de8d32018-09-05 19:55:58 +02002832 */
Amaury Denoyelleee7fcd52021-10-18 14:45:49 +02002833 h2s = h2c_frt_stream_new(h2c, h2c->dsi, &rxbuf, flags);
Willy Tarreau13278b42017-10-13 19:23:14 +02002834 if (!h2s) {
Willy Tarreau96a10c22018-12-23 18:30:44 +01002835 h2s = (struct h2s*)h2_refused_stream;
2836 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002837 }
2838
2839 h2s->st = H2_SS_OPEN;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002840 h2s->flags |= flags;
Willy Tarreau1915ca22019-01-24 11:49:37 +01002841 h2s->body_len = body_len;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002842
Willy Tarreau88d138e2019-01-02 19:38:14 +01002843 done:
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002844 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau13278b42017-10-13 19:23:14 +02002845 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002846
2847 if (h2s->flags & H2_SF_ES_RCVD) {
Willy Tarreaufc10f592019-01-30 19:28:32 +01002848 if (h2s->st == H2_SS_OPEN)
2849 h2s->st = H2_SS_HREM;
2850 else
2851 h2s_close(h2s);
Willy Tarreau13278b42017-10-13 19:23:14 +02002852 }
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002853 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002854
2855 conn_err:
2856 h2c_error(h2c, error);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002857 goto out;
Willy Tarreau13278b42017-10-13 19:23:14 +02002858
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002859 out:
2860 h2_release_buf(h2c, &rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002861 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 +01002862 return NULL;
Willy Tarreau96a10c22018-12-23 18:30:44 +01002863
2864 send_rst:
2865 /* make the demux send an RST for the current stream. We may only
2866 * do this if we're certain that the HEADERS frame was properly
2867 * decompressed so that the HPACK decoder is still kept up to date.
2868 */
2869 h2_release_buf(h2c, &rxbuf);
2870 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002871
Willy Tarreau022e5e52020-09-10 09:33:15 +02002872 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 +02002873 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau96a10c22018-12-23 18:30:44 +01002874 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002875}
2876
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002877/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2878 * It may return an error in h2c or h2s. Described in RFC7540#6.2. Most of the
2879 * errors here are reported as connection errors since it's impossible to
2880 * recover from such errors after the compression context has been altered.
2881 */
2882static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
2883{
Christopher Faulet6884aa32019-09-23 15:28:20 +02002884 struct buffer rxbuf = BUF_NULL;
2885 unsigned long long body_len = 0;
2886 uint32_t flags = 0;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002887 int error;
2888
Willy Tarreau7838a792019-08-12 18:42:03 +02002889 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2890
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002891 if (!b_size(&h2c->dbuf)) {
2892 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002893 goto fail; // empty buffer
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002894 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002895
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002896 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2897 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002898 goto fail; // incomplete frame
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002899 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002900
Christopher Faulet6884aa32019-09-23 15:28:20 +02002901 if (h2s->st != H2_SS_CLOSED) {
Amaury Denoyelle74162742020-12-11 17:53:05 +01002902 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &h2s->body_len, h2s->upgrade_protocol);
Christopher Faulet6884aa32019-09-23 15:28:20 +02002903 }
2904 else {
2905 /* the connection was already killed by an RST, let's consume
2906 * the data and send another RST.
2907 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01002908 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Christopher Fauletea7a7782019-09-26 16:19:13 +02002909 h2s = (struct h2s*)h2_error_stream;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002910 h2c->st0 = H2_CS_FRAME_E;
2911 goto send_rst;
2912 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002913
Willy Tarreau25919232019-01-03 14:48:18 +01002914 /* unrecoverable error ? */
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002915 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002916 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002917
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002918 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2919 /* RFC7540#5.1 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002920 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 +01002921 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2922 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau4781b152021-04-06 13:53:36 +02002923 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002924 goto fail;
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002925 }
2926
Willy Tarreau25919232019-01-03 14:48:18 +01002927 if (error <= 0) {
Christopher Faulet0de3f552021-10-08 08:56:00 +02002928 if (error == 0) {
2929 /* Demux not blocked because of the stream, it is an incomplete frame */
2930 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2931 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002932 goto fail; // missing data
Christopher Faulet0de3f552021-10-08 08:56:00 +02002933 }
Willy Tarreau25919232019-01-03 14:48:18 +01002934
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002935 /* stream error : send RST_STREAM */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002936 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 +01002937 h2s_error(h2s, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002938 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau4781b152021-04-06 13:53:36 +02002939 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002940 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002941 }
2942
Christopher Fauletfa922f02019-05-07 10:55:17 +02002943 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002944 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002945
Willy Tarreau927b88b2019-03-04 08:03:25 +01002946 if (h2s->cs && h2s->cs->flags & CS_FL_ERROR && h2s->st < H2_SS_ERROR)
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002947 h2s->st = H2_SS_ERROR;
Christopher Fauletfa922f02019-05-07 10:55:17 +02002948 else if (h2s->flags & H2_SF_ES_RCVD) {
2949 if (h2s->st == H2_SS_OPEN)
2950 h2s->st = H2_SS_HREM;
2951 else if (h2s->st == H2_SS_HLOC)
2952 h2s_close(h2s);
2953 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002954
Christopher Fauletf95f8762021-01-22 11:59:07 +01002955 /* Unblock busy server h2s waiting for the response headers to validate
2956 * the tunnel establishment or the end of the response of an oborted
2957 * tunnel
2958 */
2959 if ((h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY)) == (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY) ||
2960 (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)) {
2961 TRACE_STATE("Unblock h2s blocked on tunnel establishment/abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2962 h2s->flags &= ~H2_SF_BLK_MBUSY;
2963 }
2964
Willy Tarreaucbd37e02021-06-16 18:32:42 +02002965 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 +02002966 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002967 return h2s;
Willy Tarreau7838a792019-08-12 18:42:03 +02002968 fail:
2969 TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2970 return NULL;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002971
2972 send_rst:
2973 /* make the demux send an RST for the current stream. We may only
2974 * do this if we're certain that the HEADERS frame was properly
2975 * decompressed so that the HPACK decoder is still kept up to date.
2976 */
2977 h2_release_buf(h2c, &rxbuf);
2978 h2c->st0 = H2_CS_FRAME_E;
2979
Willy Tarreau022e5e52020-09-10 09:33:15 +02002980 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 +02002981 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2982 return h2s;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002983}
2984
Willy Tarreau454f9052017-10-26 19:40:35 +02002985/* processes a DATA frame. Returns > 0 on success or zero on missing data.
2986 * It may return an error in h2c or h2s. Described in RFC7540#6.1.
2987 */
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01002988static int h2c_handle_data(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02002989{
2990 int error;
2991
Willy Tarreau7838a792019-08-12 18:42:03 +02002992 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2993
Willy Tarreau454f9052017-10-26 19:40:35 +02002994 /* note that empty DATA frames are perfectly valid and sometimes used
2995 * to signal an end of stream (with the ES flag).
2996 */
2997
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002998 if (!b_size(&h2c->dbuf) && h2c->dfl) {
2999 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02003000 goto fail; // empty buffer
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003001 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003002
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003003 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
3004 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02003005 goto fail; // incomplete frame
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003006 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003007
3008 /* now either the frame is complete or the buffer is complete */
3009
Willy Tarreau454f9052017-10-26 19:40:35 +02003010 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
3011 /* RFC7540#6.1 */
3012 error = H2_ERR_STREAM_CLOSED;
3013 goto strm_err;
3014 }
3015
Christopher Faulet4f09ec82019-06-19 09:25:58 +02003016 if ((h2s->flags & H2_SF_DATA_CLEN) && (h2c->dfl - h2c->dpl) > h2s->body_len) {
Willy Tarreau1915ca22019-01-24 11:49:37 +01003017 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003018 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 +01003019 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02003020 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau1915ca22019-01-24 11:49:37 +01003021 goto strm_err;
3022 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01003023 if (!(h2c->flags & H2_CF_IS_BACK) &&
3024 (h2s->flags & (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT)) == (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT) &&
3025 ((h2c->dfl - h2c->dpl) || !(h2c->dff & H2_F_DATA_END_STREAM))) {
3026 /* a tunnel attempt was aborted but the client still try to send some raw data.
3027 * Thus the stream is closed with the CANCEL error. Here we take care it is not
3028 * an empty DATA Frame with the ES flag. The error is only handled if ES was
3029 * already sent to the client because depending on the scheduling, these data may
Ilya Shipitsinacf84592021-02-06 22:29:08 +05003030 * have been sent before the server response but not handle here.
Christopher Faulet91b21dc2021-01-22 12:13:15 +01003031 */
3032 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
3033 error = H2_ERR_CANCEL;
3034 goto strm_err;
3035 }
Willy Tarreau1915ca22019-01-24 11:49:37 +01003036
Willy Tarreaua56a6de2018-02-26 15:59:07 +01003037 if (!h2_frt_transfer_data(h2s))
Willy Tarreau7838a792019-08-12 18:42:03 +02003038 goto fail;
Willy Tarreaua56a6de2018-02-26 15:59:07 +01003039
Willy Tarreau454f9052017-10-26 19:40:35 +02003040 /* call the upper layers to process the frame, then let the upper layer
3041 * notify the stream about any change.
3042 */
3043 if (!h2s->cs) {
Willy Tarreau082c4572019-08-06 10:11:02 +02003044 /* The upper layer has already closed, this may happen on
3045 * 4xx/redirects during POST, or when receiving a response
3046 * from an H2 server after the client has aborted.
3047 */
3048 error = H2_ERR_CANCEL;
Willy Tarreau454f9052017-10-26 19:40:35 +02003049 goto strm_err;
3050 }
3051
Willy Tarreau8f650c32017-11-21 19:36:21 +01003052 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02003053 goto fail;
Willy Tarreau8f650c32017-11-21 19:36:21 +01003054
Willy Tarreau721c9742017-11-07 11:05:42 +01003055 if (h2s->st >= H2_SS_ERROR) {
Willy Tarreau454f9052017-10-26 19:40:35 +02003056 /* stream error : send RST_STREAM */
Willy Tarreaua20a5192017-12-27 11:02:06 +01003057 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02003058 }
3059
3060 /* check for completion : the callee will change this to FRAME_A or
3061 * FRAME_H once done.
3062 */
3063 if (h2c->st0 == H2_CS_FRAME_P)
Willy Tarreau7838a792019-08-12 18:42:03 +02003064 goto fail;
Willy Tarreau454f9052017-10-26 19:40:35 +02003065
Willy Tarreauc4134ba2017-12-11 18:45:08 +01003066 /* last frame */
3067 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02003068 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreaufc10f592019-01-30 19:28:32 +01003069 if (h2s->st == H2_SS_OPEN)
3070 h2s->st = H2_SS_HREM;
3071 else
3072 h2s_close(h2s);
3073
Willy Tarreau1915ca22019-01-24 11:49:37 +01003074 if (h2s->flags & H2_SF_DATA_CLEN && h2s->body_len) {
3075 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003076 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 +01003077 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02003078 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau1915ca22019-01-24 11:49:37 +01003079 goto strm_err;
3080 }
Willy Tarreauc4134ba2017-12-11 18:45:08 +01003081 }
3082
Christopher Fauletf95f8762021-01-22 11:59:07 +01003083 /* Unblock busy server h2s waiting for the end of the response for an
3084 * aborted tunnel
3085 */
3086 if ((h2c->flags & H2_CF_IS_BACK) &&
3087 (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)) {
3088 TRACE_STATE("Unblock h2s blocked on tunnel abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
3089 h2s->flags &= ~H2_SF_BLK_MBUSY;
3090 }
3091
Willy Tarreau7838a792019-08-12 18:42:03 +02003092 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02003093 return 1;
3094
Willy Tarreau454f9052017-10-26 19:40:35 +02003095 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01003096 h2s_error(h2s, error);
3097 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003098 fail:
3099 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 +02003100 return 0;
3101}
3102
Willy Tarreau63864812019-08-07 14:25:20 +02003103/* check that the current frame described in h2c->{dsi,dft,dfl,dff,...} is
3104 * valid for the current stream state. This is needed only after parsing the
3105 * frame header but in practice it can be performed at any time during
3106 * H2_CS_FRAME_P since no state transition happens there. Returns >0 on success
3107 * or 0 in case of error, in which case either h2s or h2c will carry an error.
3108 */
3109static int h2_frame_check_vs_state(struct h2c *h2c, struct h2s *h2s)
3110{
Willy Tarreau7838a792019-08-12 18:42:03 +02003111 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
3112
Willy Tarreau63864812019-08-07 14:25:20 +02003113 if (h2s->st == H2_SS_IDLE &&
3114 h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) {
3115 /* RFC7540#5.1: any frame other than HEADERS or PRIORITY in
3116 * this state MUST be treated as a connection error
3117 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003118 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 +02003119 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003120 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau63864812019-08-07 14:25:20 +02003121 /* only log if no other stream can report the error */
3122 sess_log(h2c->conn->owner);
3123 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003124 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02003125 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 +02003126 return 0;
3127 }
3128
Willy Tarreau57a18162019-11-24 14:57:53 +01003129 if (h2s->st == H2_SS_IDLE && (h2c->flags & H2_CF_IS_BACK)) {
3130 /* only PUSH_PROMISE would be permitted here */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003131 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 +01003132 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02003133 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau57a18162019-11-24 14:57:53 +01003134 TRACE_DEVEL("leaving in error (idle&back)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s);
3135 return 0;
3136 }
3137
Willy Tarreau63864812019-08-07 14:25:20 +02003138 if (h2s->st == H2_SS_HREM && h2c->dft != H2_FT_WINDOW_UPDATE &&
3139 h2c->dft != H2_FT_RST_STREAM && h2c->dft != H2_FT_PRIORITY) {
3140 /* RFC7540#5.1: any frame other than WU/PRIO/RST in
3141 * this state MUST be treated as a stream error.
3142 * 6.2, 6.6 and 6.10 further mandate that HEADERS/
3143 * PUSH_PROMISE/CONTINUATION cause connection errors.
3144 */
Amaury Denoyellea8879232020-10-27 17:16:03 +01003145 if (h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003146 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 +02003147 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02003148 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Amaury Denoyellea8879232020-10-27 17:16:03 +01003149 }
3150 else {
Willy Tarreau63864812019-08-07 14:25:20 +02003151 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
Amaury Denoyellea8879232020-10-27 17:16:03 +01003152 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003153 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 +02003154 return 0;
3155 }
3156
3157 /* Below the management of frames received in closed state is a
3158 * bit hackish because the spec makes strong differences between
3159 * streams closed by receiving RST, sending RST, and seeing ES
3160 * in both directions. In addition to this, the creation of a
3161 * new stream reusing the identifier of a closed one will be
3162 * detected here. Given that we cannot keep track of all closed
3163 * streams forever, we consider that unknown closed streams were
3164 * closed on RST received, which allows us to respond with an
3165 * RST without breaking the connection (eg: to abort a transfer).
3166 * Some frames have to be silently ignored as well.
3167 */
3168 if (h2s->st == H2_SS_CLOSED && h2c->dsi) {
3169 if (!(h2c->flags & H2_CF_IS_BACK) && h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
3170 /* #5.1.1: The identifier of a newly
3171 * established stream MUST be numerically
3172 * greater than all streams that the initiating
3173 * endpoint has opened or reserved. This
3174 * governs streams that are opened using a
3175 * HEADERS frame and streams that are reserved
3176 * using PUSH_PROMISE. An endpoint that
3177 * receives an unexpected stream identifier
3178 * MUST respond with a connection error.
3179 */
3180 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003181 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 +02003182 return 0;
3183 }
3184
Willy Tarreau4c08f122019-09-26 08:47:15 +02003185 if (h2s->flags & H2_SF_RST_RCVD &&
3186 !(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 +02003187 /* RFC7540#5.1:closed: an endpoint that
3188 * receives any frame other than PRIORITY after
3189 * receiving a RST_STREAM MUST treat that as a
3190 * stream error of type STREAM_CLOSED.
3191 *
3192 * Note that old streams fall into this category
3193 * and will lead to an RST being sent.
3194 *
3195 * However, we cannot generalize this to all frame types. Those
3196 * carrying compression state must still be processed before
3197 * being dropped or we'll desynchronize the decoder. This can
3198 * happen with request trailers received after sending an
3199 * RST_STREAM, or with header/trailers responses received after
3200 * sending RST_STREAM (aborted stream).
Willy Tarreau4c08f122019-09-26 08:47:15 +02003201 *
3202 * In addition, since our CLOSED streams always carry the
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003203 * RST_RCVD bit, we don't want to accidentally catch valid
Willy Tarreau4c08f122019-09-26 08:47:15 +02003204 * frames for a closed stream, i.e. RST/PRIO/WU.
Willy Tarreau63864812019-08-07 14:25:20 +02003205 */
3206 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
3207 h2c->st0 = H2_CS_FRAME_E;
Christopher Faulet6884aa32019-09-23 15:28:20 +02003208 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 +02003209 return 0;
3210 }
3211
3212 /* RFC7540#5.1:closed: if this state is reached as a
3213 * result of sending a RST_STREAM frame, the peer that
3214 * receives the RST_STREAM might have already sent
3215 * frames on the stream that cannot be withdrawn. An
3216 * endpoint MUST ignore frames that it receives on
3217 * closed streams after it has sent a RST_STREAM
3218 * frame. An endpoint MAY choose to limit the period
3219 * over which it ignores frames and treat frames that
3220 * arrive after this time as being in error.
3221 */
3222 if (h2s->id && !(h2s->flags & H2_SF_RST_SENT)) {
3223 /* RFC7540#5.1:closed: any frame other than
3224 * PRIO/WU/RST in this state MUST be treated as
3225 * a connection error
3226 */
3227 if (h2c->dft != H2_FT_RST_STREAM &&
3228 h2c->dft != H2_FT_PRIORITY &&
3229 h2c->dft != H2_FT_WINDOW_UPDATE) {
3230 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003231 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 +02003232 return 0;
3233 }
3234 }
3235 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003236 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02003237 return 1;
3238}
3239
Willy Tarreaubc933932017-10-09 16:21:43 +02003240/* process Rx frames to be demultiplexed */
3241static void h2_process_demux(struct h2c *h2c)
3242{
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003243 struct h2s *h2s = NULL, *tmp_h2s;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003244 struct h2_fh hdr;
3245 unsigned int padlen = 0;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003246 int32_t old_iw = h2c->miw;
Willy Tarreauf3ee0692017-10-17 08:18:25 +02003247
Willy Tarreau7838a792019-08-12 18:42:03 +02003248 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3249
Willy Tarreau081d4722017-05-16 21:51:05 +02003250 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02003251 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02003252
3253 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3254 if (h2c->st0 == H2_CS_PREFACE) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003255 TRACE_STATE("expecting preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02003256 if (h2c->flags & H2_CF_IS_BACK)
Willy Tarreau7838a792019-08-12 18:42:03 +02003257 goto out;
3258
Willy Tarreau52eed752017-09-22 15:05:09 +02003259 if (unlikely(h2c_frt_recv_preface(h2c) <= 0)) {
3260 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02003261 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003262 TRACE_PROTO("failed to receive preface", H2_EV_RX_PREFACE|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003263 h2c->st0 = H2_CS_ERROR2;
Willy Tarreauc23d6d12021-06-17 08:08:48 +02003264 if (b_data(&h2c->dbuf) ||
Christopher Faulet79b347d2021-07-26 10:18:35 +02003265 !(((const struct session *)h2c->conn->owner)->fe->options & (PR_O_NULLNOLOG|PR_O_IGNORE_PRB)))
Willy Tarreauc23d6d12021-06-17 08:08:48 +02003266 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02003267 }
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003268 goto done;
Willy Tarreau52eed752017-09-22 15:05:09 +02003269 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003270 TRACE_PROTO("received preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003271
3272 h2c->max_id = 0;
3273 h2c->st0 = H2_CS_SETTINGS1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003274 TRACE_STATE("switching to SETTINGS1", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003275 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003276
3277 if (h2c->st0 == H2_CS_SETTINGS1) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003278 /* ensure that what is pending is a valid SETTINGS frame
3279 * without an ACK.
3280 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003281 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 +02003282 if (!h2_get_frame_hdr(&h2c->dbuf, &hdr)) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003283 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003284 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau22de8d32018-09-05 19:55:58 +02003285 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003286 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 +02003287 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003288 if (!(h2c->flags & H2_CF_IS_BACK))
3289 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02003290 }
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003291 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003292 }
3293
3294 if (hdr.sid || hdr.ft != H2_FT_SETTINGS || hdr.ff & H2_F_SETTINGS_ACK) {
3295 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003296 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 +02003297 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
3298 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003299 if (!(h2c->flags & H2_CF_IS_BACK))
3300 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003301 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003302 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003303 }
3304
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003305 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003306 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003307 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 +02003308 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
3309 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003310 if (!(h2c->flags & H2_CF_IS_BACK))
3311 sess_log(h2c->conn->owner);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003312 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003313 }
3314
Willy Tarreau3bf69182018-12-21 15:34:50 +01003315 /* that's OK, switch to FRAME_P to process it. This is
3316 * a SETTINGS frame whose header has already been
3317 * deleted above.
3318 */
Willy Tarreau54f46e52019-01-30 15:11:03 +01003319 padlen = 0;
Willy Tarreau4781b152021-04-06 13:53:36 +02003320 HA_ATOMIC_INC(&h2c->px_counters->settings_rcvd);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003321 goto new_frame;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003322 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003323 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003324
3325 /* process as many incoming frames as possible below */
Willy Tarreau7838a792019-08-12 18:42:03 +02003326 while (1) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02003327 int ret = 0;
3328
Willy Tarreau7838a792019-08-12 18:42:03 +02003329 if (!b_data(&h2c->dbuf)) {
3330 TRACE_DEVEL("no more Rx data", H2_EV_RX_FRAME, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003331 h2c->flags |= H2_CF_DEM_SHORT_READ;
3332 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003333 }
3334
3335 if (h2c->st0 >= H2_CS_ERROR) {
3336 TRACE_STATE("end of connection reported", H2_EV_RX_FRAME|H2_EV_RX_EOI, h2c->conn);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003337 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003338 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003339
3340 if (h2c->st0 == H2_CS_FRAME_H) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003341 TRACE_STATE("expecting H2 frame header", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003342 if (!h2_peek_frame_hdr(&h2c->dbuf, 0, &hdr)) {
3343 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003344 break;
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003345 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003346
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003347 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003348 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 +02003349 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003350 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02003351 /* only log if no other stream can report the error */
3352 sess_log(h2c->conn->owner);
3353 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003354 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003355 break;
3356 }
3357
Willy Tarreau1d7138e2022-06-08 16:32:22 +02003358 if (h2c->rcvd_s && h2c->dsi != hdr.sid) {
3359 /* changed stream with a pending WU, need to
3360 * send it now.
3361 */
3362 TRACE_PROTO("sending stream WINDOW_UPDATE frame on stream switch", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
3363 ret = h2c_send_strm_wu(h2c);
3364 if (ret <= 0)
3365 break;
3366 }
3367
Christopher Fauletdd2a5622019-06-18 12:22:38 +02003368 padlen = 0;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003369 if (h2_ft_bit(hdr.ft) & H2_FT_PADDED_MASK && hdr.ff & H2_F_PADDED) {
3370 /* If the frame is padded (HEADERS, PUSH_PROMISE or DATA),
3371 * we read the pad length and drop it from the remaining
3372 * payload (one byte + the 9 remaining ones = 10 total
3373 * removed), so we have a frame payload starting after the
3374 * pad len. Flow controlled frames (DATA) also count the
3375 * padlen in the flow control, so it must be adjusted.
3376 */
3377 if (hdr.len < 1) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003378 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 +01003379 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003380 if (!(h2c->flags & H2_CF_IS_BACK))
3381 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003382 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003383 goto done;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003384 }
3385 hdr.len--;
3386
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003387 if (b_data(&h2c->dbuf) < 10) {
3388 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003389 break; // missing padlen
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003390 }
Willy Tarreau3bf69182018-12-21 15:34:50 +01003391
3392 padlen = *(uint8_t *)b_peek(&h2c->dbuf, 9);
3393
3394 if (padlen > hdr.len) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003395 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 +01003396 /* RFC7540#6.1 : pad length = length of
3397 * frame payload or greater => error.
3398 */
3399 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003400 if (!(h2c->flags & H2_CF_IS_BACK))
3401 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003402 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003403 goto done;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003404 }
3405
3406 if (h2_ft_bit(hdr.ft) & H2_FT_FC_MASK) {
3407 h2c->rcvd_c++;
3408 h2c->rcvd_s++;
3409 }
3410 b_del(&h2c->dbuf, 1);
3411 }
3412 h2_skip_frame_hdr(&h2c->dbuf);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003413
3414 new_frame:
Willy Tarreau7e98c052017-10-10 15:56:59 +02003415 h2c->dfl = hdr.len;
3416 h2c->dsi = hdr.sid;
3417 h2c->dft = hdr.ft;
3418 h2c->dff = hdr.ff;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003419 h2c->dpl = padlen;
Willy Tarreau73db4342019-09-25 07:28:44 +02003420 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 +02003421 h2c->st0 = H2_CS_FRAME_P;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003422
3423 /* check for minimum basic frame format validity */
3424 ret = h2_frame_check(h2c->dft, 1, h2c->dsi, h2c->dfl, global.tune.bufsize);
3425 if (ret != H2_ERR_NO_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003426 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 +01003427 h2c_error(h2c, ret);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003428 if (!(h2c->flags & H2_CF_IS_BACK))
3429 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003430 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003431 goto done;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003432 }
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01003433
3434 /* transition to HEADERS frame ends the keep-alive idle
3435 * timer and starts the http-request idle delay.
3436 */
3437 if (hdr.ft == H2_FT_HEADERS)
3438 h2c->idle_start = now_ms;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003439 }
3440
Willy Tarreau9fd5aa82019-08-06 15:21:45 +02003441 /* Only H2_CS_FRAME_P, H2_CS_FRAME_A and H2_CS_FRAME_E here.
3442 * H2_CS_FRAME_P indicates an incomplete previous operation
3443 * (most often the first attempt) and requires some validity
3444 * checks for the frame and the current state. The two other
3445 * ones are set after completion (or abortion) and must skip
3446 * validity checks.
3447 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003448 tmp_h2s = h2c_st_by_id(h2c, h2c->dsi);
3449
Willy Tarreau567beb82018-12-18 16:52:44 +01003450 if (tmp_h2s != h2s && h2s && h2s->cs &&
3451 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003452 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003453 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003454 (h2s->flags & H2_SF_ES_RCVD) ||
3455 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003456 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003457 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 +01003458 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003459 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003460 }
3461 h2s = tmp_h2s;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003462
Willy Tarreau63864812019-08-07 14:25:20 +02003463 if (h2c->st0 == H2_CS_FRAME_E ||
Willy Tarreau7838a792019-08-12 18:42:03 +02003464 (h2c->st0 == H2_CS_FRAME_P && !h2_frame_check_vs_state(h2c, h2s))) {
3465 TRACE_PROTO("stream error reported", H2_EV_RX_FRAME|H2_EV_PROTO_ERR, h2c->conn, h2s);
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003466 goto strm_err;
Willy Tarreau7838a792019-08-12 18:42:03 +02003467 }
Willy Tarreauc0da1962017-10-30 18:38:00 +01003468
Willy Tarreau7e98c052017-10-10 15:56:59 +02003469 switch (h2c->dft) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02003470 case H2_FT_SETTINGS:
Willy Tarreau7838a792019-08-12 18:42:03 +02003471 if (h2c->st0 == H2_CS_FRAME_P) {
3472 TRACE_PROTO("receiving H2 SETTINGS frame", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn, h2s);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003473 ret = h2c_handle_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003474 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003475 HA_ATOMIC_INC(&h2c->px_counters->settings_rcvd);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003476
Willy Tarreau7838a792019-08-12 18:42:03 +02003477 if (h2c->st0 == H2_CS_FRAME_A) {
3478 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 +02003479 ret = h2c_ack_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003480 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003481 break;
3482
Willy Tarreaucf68c782017-10-10 17:11:41 +02003483 case H2_FT_PING:
Willy Tarreau7838a792019-08-12 18:42:03 +02003484 if (h2c->st0 == H2_CS_FRAME_P) {
3485 TRACE_PROTO("receiving H2 PING frame", H2_EV_RX_FRAME|H2_EV_RX_PING, h2c->conn, h2s);
Willy Tarreaucf68c782017-10-10 17:11:41 +02003486 ret = h2c_handle_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003487 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003488
Willy Tarreau7838a792019-08-12 18:42:03 +02003489 if (h2c->st0 == H2_CS_FRAME_A) {
3490 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 +02003491 ret = h2c_ack_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003492 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003493 break;
3494
Willy Tarreau26f95952017-07-27 17:18:30 +02003495 case H2_FT_WINDOW_UPDATE:
Willy Tarreau7838a792019-08-12 18:42:03 +02003496 if (h2c->st0 == H2_CS_FRAME_P) {
3497 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 +02003498 ret = h2c_handle_window_update(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003499 }
Willy Tarreau26f95952017-07-27 17:18:30 +02003500 break;
3501
Willy Tarreau61290ec2017-10-17 08:19:21 +02003502 case H2_FT_CONTINUATION:
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003503 /* RFC7540#6.10: CONTINUATION may only be preceded by
Willy Tarreauea18f862018-12-22 20:19:26 +01003504 * a HEADERS/PUSH_PROMISE/CONTINUATION frame. These
3505 * frames' parsers consume all following CONTINUATION
3506 * frames so this one is out of sequence.
Willy Tarreau61290ec2017-10-17 08:19:21 +02003507 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003508 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 +01003509 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003510 if (!(h2c->flags & H2_CF_IS_BACK))
3511 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003512 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003513 goto done;
Willy Tarreau61290ec2017-10-17 08:19:21 +02003514
Willy Tarreau13278b42017-10-13 19:23:14 +02003515 case H2_FT_HEADERS:
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003516 if (h2c->st0 == H2_CS_FRAME_P) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003517 TRACE_PROTO("receiving H2 HEADERS frame", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02003518 if (h2c->flags & H2_CF_IS_BACK)
3519 tmp_h2s = h2c_bck_handle_headers(h2c, h2s);
3520 else
3521 tmp_h2s = h2c_frt_handle_headers(h2c, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003522 if (tmp_h2s) {
3523 h2s = tmp_h2s;
3524 ret = 1;
3525 }
3526 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003527 HA_ATOMIC_INC(&h2c->px_counters->headers_rcvd);
Willy Tarreau13278b42017-10-13 19:23:14 +02003528 break;
3529
Willy Tarreau454f9052017-10-26 19:40:35 +02003530 case H2_FT_DATA:
Willy Tarreau7838a792019-08-12 18:42:03 +02003531 if (h2c->st0 == H2_CS_FRAME_P) {
3532 TRACE_PROTO("receiving H2 DATA frame", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01003533 ret = h2c_handle_data(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003534 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003535 HA_ATOMIC_INC(&h2c->px_counters->data_rcvd);
Willy Tarreau454f9052017-10-26 19:40:35 +02003536
Willy Tarreau7838a792019-08-12 18:42:03 +02003537 if (h2c->st0 == H2_CS_FRAME_A) {
Willy Tarreau1d7138e2022-06-08 16:32:22 +02003538 /* rcvd_s will suffice to trigger the sending of a WU */
3539 h2c->st0 = H2_CS_FRAME_H;
Willy Tarreau7838a792019-08-12 18:42:03 +02003540 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003541 break;
Willy Tarreaucd234e92017-08-18 10:59:39 +02003542
Willy Tarreau92153fc2017-12-03 19:46:19 +01003543 case H2_FT_PRIORITY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003544 if (h2c->st0 == H2_CS_FRAME_P) {
3545 TRACE_PROTO("receiving H2 PRIORITY frame", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn, h2s);
Willy Tarreau92153fc2017-12-03 19:46:19 +01003546 ret = h2c_handle_priority(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003547 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01003548 break;
3549
Willy Tarreaucd234e92017-08-18 10:59:39 +02003550 case H2_FT_RST_STREAM:
Willy Tarreau7838a792019-08-12 18:42:03 +02003551 if (h2c->st0 == H2_CS_FRAME_P) {
3552 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 +02003553 ret = h2c_handle_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003554 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003555 HA_ATOMIC_INC(&h2c->px_counters->rst_stream_rcvd);
Willy Tarreaucd234e92017-08-18 10:59:39 +02003556 break;
3557
Willy Tarreaue96b0922017-10-30 00:28:29 +01003558 case H2_FT_GOAWAY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003559 if (h2c->st0 == H2_CS_FRAME_P) {
3560 TRACE_PROTO("receiving H2 GOAWAY frame", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn, h2s);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003561 ret = h2c_handle_goaway(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003562 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003563 HA_ATOMIC_INC(&h2c->px_counters->goaway_rcvd);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003564 break;
3565
Willy Tarreau1c661982017-10-30 13:52:01 +01003566 /* implement all extra frame types here */
Willy Tarreau7e98c052017-10-10 15:56:59 +02003567 default:
Willy Tarreau7838a792019-08-12 18:42:03 +02003568 TRACE_PROTO("receiving H2 ignored frame", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003569 /* drop frames that we ignore. They may be larger than
3570 * the buffer so we drain all of their contents until
3571 * we reach the end.
3572 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003573 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3574 b_del(&h2c->dbuf, ret);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003575 h2c->dfl -= ret;
3576 ret = h2c->dfl == 0;
3577 }
3578
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003579 strm_err:
Willy Tarreaua20a5192017-12-27 11:02:06 +01003580 /* We may have to send an RST if not done yet */
Willy Tarreau7838a792019-08-12 18:42:03 +02003581 if (h2s->st == H2_SS_ERROR) {
3582 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 +01003583 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003584 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003585
Willy Tarreau7838a792019-08-12 18:42:03 +02003586 if (h2c->st0 == H2_CS_FRAME_E) {
3587 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 +01003588 ret = h2c_send_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003589 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003590
Willy Tarreau7e98c052017-10-10 15:56:59 +02003591 /* error or missing data condition met above ? */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003592 if (ret <= 0)
Willy Tarreau7e98c052017-10-10 15:56:59 +02003593 break;
3594
3595 if (h2c->st0 != H2_CS_FRAME_H) {
Willy Tarreaubba7a4d2020-09-18 07:41:28 +02003596 if (h2c->dfl)
3597 TRACE_DEVEL("skipping remaining frame payload", H2_EV_RX_FRAME, h2c->conn, h2s);
Christopher Faulet5112a602019-09-26 16:38:28 +02003598 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3599 b_del(&h2c->dbuf, ret);
3600 h2c->dfl -= ret;
3601 if (!h2c->dfl) {
3602 TRACE_STATE("switching to FRAME_H", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
3603 h2c->st0 = H2_CS_FRAME_H;
3604 h2c->dsi = -1;
3605 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003606 }
3607 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003608
Willy Tarreau1d7138e2022-06-08 16:32:22 +02003609 if (h2c->rcvd_s > 0 &&
3610 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))) {
3611 TRACE_PROTO("sending stream WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn, h2s);
3612 h2c_send_strm_wu(h2c);
3613 }
3614
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003615 if (h2c->rcvd_c > 0 &&
Willy Tarreau7838a792019-08-12 18:42:03 +02003616 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))) {
3617 TRACE_PROTO("sending H2 WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003618 h2c_send_conn_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003619 }
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003620
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003621 done:
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003622 if (h2c->st0 >= H2_CS_ERROR || (h2c->flags & H2_CF_DEM_SHORT_READ)) {
3623 if (h2c->flags & H2_CF_RCVD_SHUT)
3624 h2c->flags |= H2_CF_END_REACHED;
3625 }
3626
Willy Tarreau567beb82018-12-18 16:52:44 +01003627 if (h2s && h2s->cs &&
3628 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003629 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003630 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003631 (h2s->flags & H2_SF_ES_RCVD) ||
3632 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003633 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003634 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 +01003635 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003636 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003637 }
Willy Tarreau1ed87b72018-11-25 08:45:16 +01003638
Willy Tarreau7838a792019-08-12 18:42:03 +02003639 if (old_iw != h2c->miw) {
3640 TRACE_STATE("notifying streams about SFCTL increase", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003641 h2c_unblock_sfctl(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003642 }
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003643
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003644 h2c_restart_reading(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02003645 out:
3646 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003647 return;
Willy Tarreaubc933932017-10-09 16:21:43 +02003648}
3649
Willy Tarreau989539b2020-01-10 17:01:29 +01003650/* resume each h2s eligible for sending in list head <head> */
3651static void h2_resume_each_sending_h2s(struct h2c *h2c, struct list *head)
3652{
3653 struct h2s *h2s, *h2s_back;
3654
3655 TRACE_ENTER(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3656
3657 list_for_each_entry_safe(h2s, h2s_back, head, list) {
3658 if (h2c->mws <= 0 ||
3659 h2c->flags & H2_CF_MUX_BLOCK_ANY ||
3660 h2c->st0 >= H2_CS_ERROR)
3661 break;
3662
3663 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003664
Willy Tarreaud9464162020-01-10 18:25:07 +01003665 if (h2s->flags & H2_SF_NOTIFIED)
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003666 continue;
3667
Willy Tarreau5723f292020-01-10 15:16:57 +01003668 /* If the sender changed his mind and unsubscribed, let's just
3669 * remove the stream from the send_list.
Willy Tarreau989539b2020-01-10 17:01:29 +01003670 */
Willy Tarreauf96508a2020-01-10 11:12:48 +01003671 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) &&
3672 (!h2s->subs || !(h2s->subs->events & SUB_RETRY_SEND))) {
Willy Tarreau989539b2020-01-10 17:01:29 +01003673 LIST_DEL_INIT(&h2s->list);
3674 continue;
3675 }
3676
Willy Tarreauf96508a2020-01-10 11:12:48 +01003677 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau5723f292020-01-10 15:16:57 +01003678 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01003679 tasklet_wakeup(h2s->subs->tasklet);
3680 h2s->subs->events &= ~SUB_RETRY_SEND;
3681 if (!h2s->subs->events)
3682 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01003683 }
3684 else if (h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) {
3685 tasklet_wakeup(h2s->shut_tl);
3686 }
Willy Tarreau989539b2020-01-10 17:01:29 +01003687 }
3688
3689 TRACE_LEAVE(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3690}
3691
Willy Tarreaubc933932017-10-09 16:21:43 +02003692/* process Tx frames from streams to be multiplexed. Returns > 0 if it reached
3693 * the end.
3694 */
3695static int h2_process_mux(struct h2c *h2c)
3696{
Willy Tarreau7838a792019-08-12 18:42:03 +02003697 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3698
Willy Tarreau01b44822018-10-03 14:26:37 +02003699 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3700 if (unlikely(h2c->st0 == H2_CS_PREFACE && (h2c->flags & H2_CF_IS_BACK))) {
3701 if (unlikely(h2c_bck_send_preface(h2c) <= 0)) {
3702 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003703 if (h2c->st0 == H2_CS_ERROR)
Willy Tarreau01b44822018-10-03 14:26:37 +02003704 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau01b44822018-10-03 14:26:37 +02003705 goto fail;
3706 }
3707 h2c->st0 = H2_CS_SETTINGS1;
3708 }
3709 /* need to wait for the other side */
Willy Tarreau75a930a2018-12-12 08:03:58 +01003710 if (h2c->st0 < H2_CS_FRAME_H)
Willy Tarreau7838a792019-08-12 18:42:03 +02003711 goto done;
Willy Tarreau01b44822018-10-03 14:26:37 +02003712 }
3713
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003714 /* start by sending possibly pending window updates */
Willy Tarreaue74679a2019-08-06 15:39:32 +02003715 if (h2c->rcvd_s > 0 &&
3716 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3717 h2c_send_strm_wu(h2c) < 0)
3718 goto fail;
3719
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003720 if (h2c->rcvd_c > 0 &&
3721 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3722 h2c_send_conn_wu(h2c) < 0)
3723 goto fail;
3724
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003725 /* First we always process the flow control list because the streams
3726 * waiting there were already elected for immediate emission but were
3727 * blocked just on this.
3728 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003729 h2_resume_each_sending_h2s(h2c, &h2c->fctl_list);
3730 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003731
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003732 fail:
Willy Tarreau3eabe9b2017-11-07 11:03:01 +01003733 if (unlikely(h2c->st0 >= H2_CS_ERROR)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02003734 if (h2c->st0 == H2_CS_ERROR) {
3735 if (h2c->max_id >= 0) {
3736 h2c_send_goaway_error(h2c, NULL);
3737 if (h2c->flags & H2_CF_MUX_BLOCK_ANY)
Willy Tarreau7838a792019-08-12 18:42:03 +02003738 goto out0;
Willy Tarreau081d4722017-05-16 21:51:05 +02003739 }
3740
3741 h2c->st0 = H2_CS_ERROR2; // sent (or failed hard) !
3742 }
Willy Tarreau081d4722017-05-16 21:51:05 +02003743 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003744 done:
3745 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
3746 return 1;
3747 out0:
3748 TRACE_DEVEL("leaving in blocked situation", H2_EV_H2C_WAKE, h2c->conn);
3749 return 0;
Willy Tarreaubc933932017-10-09 16:21:43 +02003750}
3751
Willy Tarreau62f52692017-10-08 23:01:42 +02003752
Willy Tarreau479998a2018-11-18 06:30:59 +01003753/* Attempt to read data, and subscribe if none available.
3754 * The function returns 1 if data has been received, otherwise zero.
3755 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003756static int h2_recv(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003757{
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003758 struct connection *conn = h2c->conn;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003759 struct buffer *buf;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003760 int max;
Olivier Houchard7505f942018-08-21 18:10:44 +02003761 size_t ret;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003762
Willy Tarreau7838a792019-08-12 18:42:03 +02003763 TRACE_ENTER(H2_EV_H2C_RECV, h2c->conn);
3764
3765 if (h2c->wait_event.events & SUB_RETRY_RECV) {
3766 TRACE_DEVEL("leaving on sub_recv", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003767 return (b_data(&h2c->dbuf));
Willy Tarreau7838a792019-08-12 18:42:03 +02003768 }
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003769
Willy Tarreau7838a792019-08-12 18:42:03 +02003770 if (!h2_recv_allowed(h2c)) {
3771 TRACE_DEVEL("leaving on !recv_allowed", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003772 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003773 }
Willy Tarreaua2af5122017-10-09 11:56:46 +02003774
Willy Tarreau44e973f2018-03-01 17:49:30 +01003775 buf = h2_get_buf(h2c, &h2c->dbuf);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003776 if (!buf) {
3777 h2c->flags |= H2_CF_DEM_DALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02003778 TRACE_DEVEL("leaving on !alloc", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003779 return 0;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003780 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003781
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003782 if (h2c->flags & H2_CF_RCVD_SHUT) {
3783 TRACE_DEVEL("leaving on rcvd_shut", H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau49acac02021-11-19 11:41:10 +01003784 return 1;
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003785 }
3786
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003787 if (!b_data(buf)) {
3788 /* try to pre-align the buffer like the
3789 * rxbufs will be to optimize memory copies. We'll make
3790 * sure that the frame header lands at the end of the
3791 * HTX block to alias it upon recv. We cannot use the
3792 * head because rcv_buf() will realign the buffer if
3793 * it's empty. Thus we cheat and pretend we already
3794 * have a few bytes there.
3795 */
3796 max = buf_room_for_htx_data(buf) + 9;
3797 buf->head = sizeof(struct htx) - 9;
3798 }
3799 else
3800 max = b_room(buf);
Willy Tarreau2a59e872018-12-12 08:23:47 +01003801
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003802 ret = max ? conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0) : 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003803
Christopher Fauletde9d6052021-04-23 12:25:18 +02003804 if (max && !ret && h2_recv_allowed(h2c)) {
3805 TRACE_DATA("failed to receive data, subscribing", H2_EV_H2C_RECV, h2c->conn);
3806 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h2c->wait_event);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003807 } else if (ret) {
Willy Tarreau022e5e52020-09-10 09:33:15 +02003808 TRACE_DATA("received data", H2_EV_H2C_RECV, h2c->conn, 0, 0, (void*)(long)ret);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003809 h2c->flags &= ~H2_CF_DEM_SHORT_READ;
3810 }
Olivier Houchard81a15af2018-10-19 17:26:49 +02003811
Christopher Fauletde9d6052021-04-23 12:25:18 +02003812 if (conn_xprt_read0_pending(h2c->conn)) {
3813 TRACE_DATA("received read0", H2_EV_H2C_RECV, h2c->conn);
3814 h2c->flags |= H2_CF_RCVD_SHUT;
3815 }
3816
Olivier Houcharda1411e62018-08-17 18:42:48 +02003817 if (!b_data(buf)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +01003818 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02003819 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard46677732018-11-29 17:06:17 +01003820 return (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003821 }
3822
Willy Tarreau7838a792019-08-12 18:42:03 +02003823 if (b_data(buf) == buf->size) {
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003824 h2c->flags |= H2_CF_DEM_DFULL;
Willy Tarreau35fb8462019-10-02 11:05:46 +02003825 TRACE_STATE("demux buffer full", H2_EV_H2C_RECV|H2_EV_H2C_BLK, h2c->conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003826 }
3827
3828 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003829 return !!ret || (conn->flags & CO_FL_ERROR) || conn_xprt_read0_pending(conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003830}
3831
Willy Tarreau479998a2018-11-18 06:30:59 +01003832/* Try to send data if possible.
3833 * The function returns 1 if data have been sent, otherwise zero.
3834 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003835static int h2_send(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003836{
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003837 struct connection *conn = h2c->conn;
Willy Tarreaubc933932017-10-09 16:21:43 +02003838 int done;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003839 int sent = 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003840
Willy Tarreau7838a792019-08-12 18:42:03 +02003841 TRACE_ENTER(H2_EV_H2C_SEND, h2c->conn);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003842
Willy Tarreau7838a792019-08-12 18:42:03 +02003843 if (conn->flags & CO_FL_ERROR) {
3844 TRACE_DEVEL("leaving on error", H2_EV_H2C_SEND, h2c->conn);
3845 return 1;
3846 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003847
Willy Tarreau911db9b2020-01-23 16:27:54 +01003848 if (conn->flags & CO_FL_WAIT_XPRT) {
Willy Tarreaua2af5122017-10-09 11:56:46 +02003849 /* a handshake was requested */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003850 goto schedule;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003851 }
3852
Willy Tarreaubc933932017-10-09 16:21:43 +02003853 /* This loop is quite simple : it tries to fill as much as it can from
3854 * pending streams into the existing buffer until it's reportedly full
3855 * or the end of send requests is reached. Then it tries to send this
3856 * buffer's contents out, marks it not full if at least one byte could
3857 * be sent, and tries again.
3858 *
3859 * The snd_buf() function normally takes a "flags" argument which may
3860 * be made of a combination of CO_SFL_MSG_MORE to indicate that more
3861 * data immediately comes and CO_SFL_STREAMER to indicate that the
3862 * connection is streaming lots of data (used to increase TLS record
3863 * size at the expense of latency). The former can be sent any time
3864 * there's a buffer full flag, as it indicates at least one stream
3865 * attempted to send and failed so there are pending data. An
3866 * alternative would be to set it as long as there's an active stream
3867 * but that would be problematic for ACKs until we have an absolute
3868 * guarantee that all waiters have at least one byte to send. The
3869 * latter should possibly not be set for now.
3870 */
3871
3872 done = 0;
3873 while (!done) {
3874 unsigned int flags = 0;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003875 unsigned int released = 0;
3876 struct buffer *buf;
Willy Tarreaubc933932017-10-09 16:21:43 +02003877
3878 /* fill as much as we can into the current buffer */
3879 while (((h2c->flags & (H2_CF_MUX_MFULL|H2_CF_MUX_MALLOC)) == 0) && !done)
3880 done = h2_process_mux(h2c);
3881
Olivier Houchard2b094432019-01-29 18:28:36 +01003882 if (h2c->flags & H2_CF_MUX_MALLOC)
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003883 done = 1; // we won't go further without extra buffers
Olivier Houchard2b094432019-01-29 18:28:36 +01003884
Christopher Faulet9a3d3fc2020-10-22 16:24:58 +02003885 if ((conn->flags & (CO_FL_SOCK_WR_SH|CO_FL_ERROR)) ||
Willy Tarreaue90653b2021-10-21 17:30:06 +02003886 (h2c->flags & H2_CF_GOAWAY_FAILED))
Willy Tarreaubc933932017-10-09 16:21:43 +02003887 break;
3888
3889 if (h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))
3890 flags |= CO_SFL_MSG_MORE;
3891
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003892 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3893 if (b_data(buf)) {
3894 int ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, buf, b_data(buf), flags);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003895 if (!ret) {
3896 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003897 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003898 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003899 sent = 1;
Willy Tarreau022e5e52020-09-10 09:33:15 +02003900 TRACE_DATA("sent data", H2_EV_H2C_SEND, h2c->conn, 0, buf, (void*)(long)ret);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003901 b_del(buf, ret);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003902 if (b_data(buf)) {
3903 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003904 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003905 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003906 }
3907 b_free(buf);
3908 released++;
Willy Tarreau787db9a2018-06-14 18:31:46 +02003909 }
Willy Tarreaubc933932017-10-09 16:21:43 +02003910
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003911 if (released)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01003912 offer_buffers(NULL, released);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003913
Willy Tarreaubc933932017-10-09 16:21:43 +02003914 /* wrote at least one byte, the buffer is not full anymore */
Christopher Faulet69fe5ce2019-10-24 10:31:01 +02003915 if (sent)
3916 h2c->flags &= ~(H2_CF_MUX_MFULL | H2_CF_DEM_MROOM);
Willy Tarreaubc933932017-10-09 16:21:43 +02003917 }
3918
Willy Tarreaua2af5122017-10-09 11:56:46 +02003919 if (conn->flags & CO_FL_SOCK_WR_SH) {
3920 /* output closed, nothing to send, clear the buffer to release it */
Willy Tarreau51330962019-05-26 09:38:07 +02003921 b_reset(br_tail(h2c->mbuf));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003922 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02003923 /* We're not full anymore, so we can wake any task that are waiting
3924 * for us.
3925 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003926 if (!(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM)) && h2c->st0 >= H2_CS_FRAME_H)
3927 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01003928
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003929 /* We're done, no more to send */
Willy Tarreau7838a792019-08-12 18:42:03 +02003930 if (!br_data(h2c->mbuf)) {
3931 TRACE_DEVEL("leaving with everything sent", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003932 return sent;
Willy Tarreau7838a792019-08-12 18:42:03 +02003933 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003934schedule:
Willy Tarreau7838a792019-08-12 18:42:03 +02003935 if (!(conn->flags & CO_FL_ERROR) && !(h2c->wait_event.events & SUB_RETRY_SEND)) {
3936 TRACE_STATE("more data to send, subscribing", H2_EV_H2C_SEND, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003937 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003938 }
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003939
Willy Tarreau7838a792019-08-12 18:42:03 +02003940 TRACE_DEVEL("leaving with some data left to send", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003941 return sent;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003942}
3943
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003944/* this is the tasklet referenced in h2c->wait_event.tasklet */
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003945struct task *h2_io_cb(struct task *t, void *ctx, unsigned int state)
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003946{
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003947 struct connection *conn;
3948 struct tasklet *tl = (struct tasklet *)t;
3949 int conn_in_list;
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003950 struct h2c *h2c = ctx;
Olivier Houchard7505f942018-08-21 18:10:44 +02003951 int ret = 0;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003952
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003953 if (state & TASK_F_USR1) {
3954 /* the tasklet was idling on an idle connection, it might have
3955 * been stolen, let's be careful!
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003956 */
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003957 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3958 if (t->context == NULL) {
3959 /* The connection has been taken over by another thread,
3960 * we're no longer responsible for it, so just free the
3961 * tasklet, and do nothing.
3962 */
3963 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3964 tasklet_free(tl);
Willy Tarreau74163142021-03-13 11:30:19 +01003965 t = NULL;
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003966 goto leave;
3967 }
3968 conn = h2c->conn;
3969 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003970
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003971 conn_in_list = conn->flags & CO_FL_LIST_MASK;
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003972
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003973 /* Remove the connection from the list, to be sure nobody attempts
3974 * to use it while we handle the I/O events
3975 */
3976 if (conn_in_list)
3977 conn_delete_from_tree(&conn->hash_node->node);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003978
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003979 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3980 } else {
3981 /* we're certain the connection was not in an idle list */
3982 conn = h2c->conn;
3983 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3984 conn_in_list = 0;
3985 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003986
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003987 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchard7505f942018-08-21 18:10:44 +02003988 ret = h2_send(h2c);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003989 if (!(h2c->wait_event.events & SUB_RETRY_RECV))
Olivier Houchard7505f942018-08-21 18:10:44 +02003990 ret |= h2_recv(h2c);
Willy Tarreaucef5c8e2018-12-18 10:29:54 +01003991 if (ret || b_data(&h2c->dbuf))
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003992 ret = h2_process(h2c);
3993
3994 /* If we were in an idle list, we want to add it back into it,
3995 * unless h2_process() returned -1, which mean it has destroyed
3996 * the connection (testing !ret is enough, if h2_process() wasn't
3997 * called then ret will be 0 anyway.
3998 */
Willy Tarreau74163142021-03-13 11:30:19 +01003999 if (ret < 0)
4000 t = NULL;
4001
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004002 if (!ret && conn_in_list) {
4003 struct server *srv = objt_server(conn->target);
4004
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004005 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004006 if (conn_in_list == CO_FL_SAFE_LIST)
Willy Tarreau430bf4a2021-03-04 09:45:32 +01004007 ebmb_insert(&srv->per_thr[tid].safe_conns, &conn->hash_node->node, sizeof(conn->hash_node->hash));
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004008 else
Willy Tarreau430bf4a2021-03-04 09:45:32 +01004009 ebmb_insert(&srv->per_thr[tid].idle_conns, &conn->hash_node->node, sizeof(conn->hash_node->hash));
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004010 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004011 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004012
Willy Tarreau38468772020-06-28 00:31:13 +02004013leave:
Willy Tarreau7838a792019-08-12 18:42:03 +02004014 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreau74163142021-03-13 11:30:19 +01004015 return t;
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004016}
Willy Tarreaua2af5122017-10-09 11:56:46 +02004017
Willy Tarreau62f52692017-10-08 23:01:42 +02004018/* callback called on any event by the connection handler.
4019 * It applies changes and returns zero, or < 0 if it wants immediate
4020 * destruction of the connection (which normally doesn not happen in h2).
4021 */
Olivier Houchard7505f942018-08-21 18:10:44 +02004022static int h2_process(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02004023{
Olivier Houchard7505f942018-08-21 18:10:44 +02004024 struct connection *conn = h2c->conn;
Willy Tarreaua2af5122017-10-09 11:56:46 +02004025
Willy Tarreau7838a792019-08-12 18:42:03 +02004026 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
4027
Willy Tarreauf0961222021-02-05 11:41:46 +01004028 if (!(h2c->flags & H2_CF_DEM_BLOCK_ANY) &&
4029 (b_data(&h2c->dbuf) || (h2c->flags & H2_CF_RCVD_SHUT))) {
Willy Tarreaud13bf272017-12-14 10:34:52 +01004030 h2_process_demux(h2c);
4031
4032 if (h2c->st0 >= H2_CS_ERROR || conn->flags & CO_FL_ERROR)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004033 b_reset(&h2c->dbuf);
Willy Tarreaud13bf272017-12-14 10:34:52 +01004034
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004035 if (!b_full(&h2c->dbuf))
Willy Tarreaud13bf272017-12-14 10:34:52 +01004036 h2c->flags &= ~H2_CF_DEM_DFULL;
4037 }
Olivier Houchard7505f942018-08-21 18:10:44 +02004038 h2_send(h2c);
Willy Tarreaud13bf272017-12-14 10:34:52 +01004039
Willy Tarreaub1e600c2020-10-13 18:09:15 +02004040 if (unlikely(h2c->proxy->disabled) && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau8ec14062017-12-30 18:08:13 +01004041 /* frontend is stopping, reload likely in progress, let's try
4042 * to announce a graceful shutdown if not yet done. We don't
4043 * care if it fails, it will be tried again later.
4044 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004045 TRACE_STATE("proxy stopped, sending GOAWAY", H2_EV_H2C_WAKE|H2_EV_TX_FRAME, conn);
Willy Tarreau8ec14062017-12-30 18:08:13 +01004046 if (!(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
4047 if (h2c->last_sid < 0)
4048 h2c->last_sid = (1U << 31) - 1;
4049 h2c_send_goaway_error(h2c, NULL);
4050 }
4051 }
4052
Olivier Houchard7fc96d52017-11-23 18:25:47 +01004053 /*
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004054 * If we received early data, and the handshake is done, wake
4055 * any stream that was waiting for it.
Olivier Houchard7fc96d52017-11-23 18:25:47 +01004056 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004057 if (!(h2c->flags & H2_CF_WAIT_FOR_HS) &&
Willy Tarreau911db9b2020-01-23 16:27:54 +01004058 (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 +01004059 struct eb32_node *node;
4060 struct h2s *h2s;
4061
4062 h2c->flags |= H2_CF_WAIT_FOR_HS;
4063 node = eb32_lookup_ge(&h2c->streams_by_id, 1);
4064
4065 while (node) {
4066 h2s = container_of(node, struct h2s, by_id);
Willy Tarreaufde287c2018-12-19 18:33:16 +01004067 if (h2s->cs && h2s->cs->flags & CS_FL_WAIT_FOR_HS)
Willy Tarreau7e094452018-12-19 18:08:52 +01004068 h2s_notify_recv(h2s);
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004069 node = eb32_next(node);
4070 }
Olivier Houchard7fc96d52017-11-23 18:25:47 +01004071 }
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004072
Christopher Fauletaade4ed2020-10-08 15:38:41 +02004073 if (conn->flags & CO_FL_ERROR || h2c_read0_pending(h2c) ||
Willy Tarreau29a98242017-10-31 06:59:15 +01004074 h2c->st0 == H2_CS_ERROR2 || h2c->flags & H2_CF_GOAWAY_FAILED ||
4075 (eb_is_empty(&h2c->streams_by_id) && h2c->last_sid >= 0 &&
4076 h2c->max_id >= h2c->last_sid)) {
Willy Tarreau23482912019-05-07 15:23:14 +02004077 h2_wake_some_streams(h2c, 0);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004078
4079 if (eb_is_empty(&h2c->streams_by_id)) {
4080 /* no more stream, kill the connection now */
Christopher Faulet73c12072019-04-08 11:23:22 +02004081 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004082 TRACE_DEVEL("leaving after releasing the connection", H2_EV_H2C_WAKE);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004083 return -1;
4084 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004085
4086 /* connections in error must be removed from the idle lists */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004087 if (conn->flags & CO_FL_LIST_MASK) {
4088 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004089 conn_delete_from_tree(&conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004090 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4091 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004092 }
4093 else if (h2c->st0 == H2_CS_ERROR) {
4094 /* connections in error must be removed from the idle lists */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004095 if (conn->flags & CO_FL_LIST_MASK) {
4096 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004097 conn_delete_from_tree(&conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004098 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4099 }
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004100 }
4101
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004102 if (!b_data(&h2c->dbuf))
Willy Tarreau44e973f2018-03-01 17:49:30 +01004103 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004104
Olivier Houchard53216e72018-10-10 15:46:36 +02004105 if ((conn->flags & CO_FL_SOCK_WR_SH) ||
4106 h2c->st0 == H2_CS_ERROR2 || (h2c->flags & H2_CF_GOAWAY_FAILED) ||
4107 (h2c->st0 != H2_CS_ERROR &&
Willy Tarreau662fafc2019-05-26 09:43:07 +02004108 !br_data(h2c->mbuf) &&
Olivier Houchard53216e72018-10-10 15:46:36 +02004109 (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) &&
4110 ((h2c->flags & H2_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&h2c->send_list))))
Willy Tarreau2e3c0002019-05-26 09:45:23 +02004111 h2_release_mbuf(h2c);
Willy Tarreaua2af5122017-10-09 11:56:46 +02004112
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01004113 h2c_update_timeout(h2c);
Olivier Houchard7505f942018-08-21 18:10:44 +02004114 h2_send(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004115 TRACE_LEAVE(H2_EV_H2C_WAKE, conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02004116 return 0;
4117}
4118
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004119/* wake-up function called by the connection layer (mux_ops.wake) */
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004120static int h2_wake(struct connection *conn)
4121{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004122 struct h2c *h2c = conn->ctx;
Willy Tarreau7838a792019-08-12 18:42:03 +02004123 int ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004124
Willy Tarreau7838a792019-08-12 18:42:03 +02004125 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
4126 ret = h2_process(h2c);
Willy Tarreau508f9892020-02-11 04:38:56 +01004127 if (ret >= 0)
4128 h2_wake_some_streams(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02004129 TRACE_LEAVE(H2_EV_H2C_WAKE);
4130 return ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004131}
4132
Willy Tarreauea392822017-10-31 10:02:25 +01004133/* Connection timeout management. The principle is that if there's no receipt
4134 * nor sending for a certain amount of time, the connection is closed. If the
4135 * MUX buffer still has lying data or is not allocatable, the connection is
4136 * immediately killed. If it's allocatable and empty, we attempt to send a
4137 * GOAWAY frame.
4138 */
Willy Tarreau144f84a2021-03-02 16:09:26 +01004139struct task *h2_timeout_task(struct task *t, void *context, unsigned int state)
Willy Tarreauea392822017-10-31 10:02:25 +01004140{
Olivier Houchard9f6af332018-05-25 14:04:04 +02004141 struct h2c *h2c = context;
Willy Tarreauea392822017-10-31 10:02:25 +01004142 int expired = tick_is_expired(t->expire, now_ms);
4143
Willy Tarreau7838a792019-08-12 18:42:03 +02004144 TRACE_ENTER(H2_EV_H2C_WAKE, h2c ? h2c->conn : NULL);
4145
Willy Tarreaubd42e922020-06-30 11:19:23 +02004146 if (h2c) {
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004147 /* Make sure nobody stole the connection from us */
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004148 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004149
4150 /* Somebody already stole the connection from us, so we should not
4151 * free it, we just have to free the task.
4152 */
4153 if (!t->context) {
4154 h2c = NULL;
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004155 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004156 goto do_leave;
4157 }
4158
4159
Willy Tarreaubd42e922020-06-30 11:19:23 +02004160 if (!expired) {
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004161 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004162 TRACE_DEVEL("leaving (not expired)", H2_EV_H2C_WAKE, h2c->conn);
4163 return t;
4164 }
Willy Tarreauea392822017-10-31 10:02:25 +01004165
Willy Tarreaubd42e922020-06-30 11:19:23 +02004166 if (!h2c_may_expire(h2c)) {
4167 /* we do still have streams but all of them are idle, waiting
4168 * for the data layer, so we must not enforce the timeout here.
4169 */
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004170 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004171 t->expire = TICK_ETERNITY;
4172 return t;
4173 }
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02004174
Willy Tarreaubd42e922020-06-30 11:19:23 +02004175 /* We're about to destroy the connection, so make sure nobody attempts
4176 * to steal it from us.
4177 */
Willy Tarreaubd42e922020-06-30 11:19:23 +02004178 if (h2c->conn->flags & CO_FL_LIST_MASK)
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004179 conn_delete_from_tree(&h2c->conn->hash_node->node);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004180
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004181 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004182 }
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004183
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004184do_leave:
Olivier Houchard3f795f72019-04-17 22:51:06 +02004185 task_destroy(t);
Willy Tarreau0975f112018-03-29 15:22:59 +02004186
4187 if (!h2c) {
4188 /* resources were already deleted */
Willy Tarreau7838a792019-08-12 18:42:03 +02004189 TRACE_DEVEL("leaving (not more h2c)", H2_EV_H2C_WAKE);
Willy Tarreau0975f112018-03-29 15:22:59 +02004190 return NULL;
4191 }
4192
4193 h2c->task = NULL;
Willy Tarreauea392822017-10-31 10:02:25 +01004194 h2c_error(h2c, H2_ERR_NO_ERROR);
Willy Tarreau23482912019-05-07 15:23:14 +02004195 h2_wake_some_streams(h2c, 0);
Willy Tarreauea392822017-10-31 10:02:25 +01004196
Willy Tarreau662fafc2019-05-26 09:43:07 +02004197 if (br_data(h2c->mbuf)) {
Willy Tarreauea392822017-10-31 10:02:25 +01004198 /* don't even try to send a GOAWAY, the buffer is stuck */
4199 h2c->flags |= H2_CF_GOAWAY_FAILED;
4200 }
4201
4202 /* try to send but no need to insist */
Willy Tarreau599391a2017-11-24 10:16:00 +01004203 h2c->last_sid = h2c->max_id;
Willy Tarreauea392822017-10-31 10:02:25 +01004204 if (h2c_send_goaway_error(h2c, NULL) <= 0)
4205 h2c->flags |= H2_CF_GOAWAY_FAILED;
4206
Willy Tarreau662fafc2019-05-26 09:43:07 +02004207 if (br_data(h2c->mbuf) && !(h2c->flags & H2_CF_GOAWAY_FAILED) && conn_xprt_ready(h2c->conn)) {
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004208 unsigned int released = 0;
4209 struct buffer *buf;
4210
4211 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
4212 if (b_data(buf)) {
4213 int ret = h2c->conn->xprt->snd_buf(h2c->conn, h2c->conn->xprt_ctx, buf, b_data(buf), 0);
4214 if (!ret)
4215 break;
4216 b_del(buf, ret);
4217 if (b_data(buf))
4218 break;
4219 b_free(buf);
4220 released++;
4221 }
Willy Tarreau787db9a2018-06-14 18:31:46 +02004222 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004223
4224 if (released)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01004225 offer_buffers(NULL, released);
Willy Tarreau787db9a2018-06-14 18:31:46 +02004226 }
Willy Tarreauea392822017-10-31 10:02:25 +01004227
Willy Tarreau4481e262019-10-31 15:36:30 +01004228 /* in any case this connection must not be considered idle anymore */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004229 if (h2c->conn->flags & CO_FL_LIST_MASK) {
4230 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004231 conn_delete_from_tree(&h2c->conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004232 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4233 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004234
Willy Tarreau0975f112018-03-29 15:22:59 +02004235 /* either we can release everything now or it will be done later once
4236 * the last stream closes.
4237 */
4238 if (eb_is_empty(&h2c->streams_by_id))
Christopher Faulet73c12072019-04-08 11:23:22 +02004239 h2_release(h2c);
Willy Tarreauea392822017-10-31 10:02:25 +01004240
Willy Tarreau7838a792019-08-12 18:42:03 +02004241 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreauea392822017-10-31 10:02:25 +01004242 return NULL;
4243}
4244
4245
Willy Tarreau62f52692017-10-08 23:01:42 +02004246/*******************************************/
4247/* functions below are used by the streams */
4248/*******************************************/
4249
4250/*
4251 * Attach a new stream to a connection
4252 * (Used for outgoing connections)
4253 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01004254static struct conn_stream *h2_attach(struct connection *conn, struct session *sess)
Willy Tarreau62f52692017-10-08 23:01:42 +02004255{
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004256 struct conn_stream *cs;
4257 struct h2s *h2s;
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004258 struct h2c *h2c = conn->ctx;
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004259
Willy Tarreau7838a792019-08-12 18:42:03 +02004260 TRACE_ENTER(H2_EV_H2S_NEW, conn);
Christopher Faulet236c93b2020-07-02 09:19:54 +02004261 cs = cs_new(conn, conn->target);
Willy Tarreau7838a792019-08-12 18:42:03 +02004262 if (!cs) {
4263 TRACE_DEVEL("leaving on CS allocation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004264 return NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004265 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01004266 h2s = h2c_bck_stream_new(h2c, cs, sess);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004267 if (!h2s) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004268 TRACE_DEVEL("leaving on stream creation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004269 cs_free(cs);
4270 return NULL;
4271 }
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004272
4273 /* the connection is not idle anymore, let's mark this */
4274 HA_ATOMIC_AND(&h2c->wait_event.tasklet->state, ~TASK_F_USR1);
Willy Tarreau4f8cd432021-03-02 17:27:58 +01004275 xprt_set_used(h2c->conn, h2c->conn->xprt, h2c->conn->xprt_ctx);
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004276
Willy Tarreau7838a792019-08-12 18:42:03 +02004277 TRACE_LEAVE(H2_EV_H2S_NEW, conn, h2s);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004278 return cs;
Willy Tarreau62f52692017-10-08 23:01:42 +02004279}
4280
Willy Tarreaufafd3982018-11-18 21:29:20 +01004281/* Retrieves the first valid conn_stream from this connection, or returns NULL.
4282 * We have to scan because we may have some orphan streams. It might be
4283 * beneficial to scan backwards from the end to reduce the likeliness to find
4284 * orphans.
4285 */
4286static const struct conn_stream *h2_get_first_cs(const struct connection *conn)
4287{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004288 struct h2c *h2c = conn->ctx;
Willy Tarreaufafd3982018-11-18 21:29:20 +01004289 struct h2s *h2s;
4290 struct eb32_node *node;
4291
4292 node = eb32_first(&h2c->streams_by_id);
4293 while (node) {
4294 h2s = container_of(node, struct h2s, by_id);
4295 if (h2s->cs)
4296 return h2s->cs;
4297 node = eb32_next(node);
4298 }
4299 return NULL;
4300}
4301
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004302static int h2_ctl(struct connection *conn, enum mux_ctl_type mux_ctl, void *output)
4303{
4304 int ret = 0;
4305 struct h2c *h2c = conn->ctx;
4306
4307 switch (mux_ctl) {
4308 case MUX_STATUS:
4309 /* Only consider the mux to be ready if we're done with
4310 * the preface and settings, and we had no error.
4311 */
4312 if (h2c->st0 >= H2_CS_FRAME_H && h2c->st0 < H2_CS_ERROR)
4313 ret |= MUX_STATUS_READY;
4314 return ret;
Christopher Faulet4c8ad842020-10-06 14:59:17 +02004315 case MUX_EXIT_STATUS:
4316 return MUX_ES_UNKNOWN;
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004317 default:
4318 return -1;
4319 }
4320}
4321
Willy Tarreau62f52692017-10-08 23:01:42 +02004322/*
Olivier Houchard060ed432018-11-06 16:32:42 +01004323 * Destroy the mux and the associated connection, if it is no longer used
4324 */
Christopher Faulet73c12072019-04-08 11:23:22 +02004325static void h2_destroy(void *ctx)
Olivier Houchard060ed432018-11-06 16:32:42 +01004326{
Christopher Faulet73c12072019-04-08 11:23:22 +02004327 struct h2c *h2c = ctx;
Olivier Houchard060ed432018-11-06 16:32:42 +01004328
Willy Tarreau7838a792019-08-12 18:42:03 +02004329 TRACE_ENTER(H2_EV_H2C_END, h2c->conn);
Christopher Faulet39a96ee2019-04-08 10:52:21 +02004330 if (eb_is_empty(&h2c->streams_by_id) || !h2c->conn || h2c->conn->ctx != h2c)
Christopher Faulet73c12072019-04-08 11:23:22 +02004331 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004332 TRACE_LEAVE(H2_EV_H2C_END);
Olivier Houchard060ed432018-11-06 16:32:42 +01004333}
4334
4335/*
Willy Tarreau62f52692017-10-08 23:01:42 +02004336 * Detach the stream from the connection and possibly release the connection.
4337 */
4338static void h2_detach(struct conn_stream *cs)
4339{
Willy Tarreau60935142017-10-16 18:11:19 +02004340 struct h2s *h2s = cs->ctx;
4341 struct h2c *h2c;
Olivier Houchardf502aca2018-12-14 19:42:40 +01004342 struct session *sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004343
Willy Tarreau7838a792019-08-12 18:42:03 +02004344 TRACE_ENTER(H2_EV_STRM_END, h2s ? h2s->h2c->conn : NULL, h2s);
4345
Willy Tarreau60935142017-10-16 18:11:19 +02004346 cs->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004347 if (!h2s) {
4348 TRACE_LEAVE(H2_EV_STRM_END);
Willy Tarreau60935142017-10-16 18:11:19 +02004349 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004350 }
Willy Tarreau60935142017-10-16 18:11:19 +02004351
Willy Tarreaud9464162020-01-10 18:25:07 +01004352 /* there's no txbuf so we're certain not to be able to send anything */
4353 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02004354
Olivier Houchardf502aca2018-12-14 19:42:40 +01004355 sess = h2s->sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004356 h2c = h2s->h2c;
4357 h2s->cs = NULL;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02004358 h2c->nb_cs--;
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01004359 if (!h2c->nb_cs)
4360 h2c->idle_start = now_ms;
4361
Willy Tarreaufa1d3572019-01-31 10:31:51 +01004362 if ((h2c->flags & (H2_CF_IS_BACK|H2_CF_DEM_TOOMANY)) == H2_CF_DEM_TOOMANY &&
4363 !h2_frt_has_too_many_cs(h2c)) {
4364 /* frontend connection was blocking new streams creation */
Willy Tarreauf2101912018-07-19 10:11:38 +02004365 h2c->flags &= ~H2_CF_DEM_TOOMANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004366 h2c_restart_reading(h2c, 1);
Willy Tarreauf2101912018-07-19 10:11:38 +02004367 }
Willy Tarreau60935142017-10-16 18:11:19 +02004368
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004369 /* this stream may be blocked waiting for some data to leave (possibly
4370 * an ES or RST frame), so orphan it in this case.
4371 */
Willy Tarreau3041fcc2018-03-29 15:41:32 +02004372 if (!(cs->conn->flags & CO_FL_ERROR) &&
Willy Tarreaua2b51812018-07-27 09:55:14 +02004373 (h2c->st0 < H2_CS_ERROR) &&
Willy Tarreau5723f292020-01-10 15:16:57 +01004374 (h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL)) &&
Willy Tarreauf96508a2020-01-10 11:12:48 +01004375 ((h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) || h2s->subs)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004376 TRACE_DEVEL("leaving on stream blocked", H2_EV_STRM_END|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01004377 /* refresh the timeout if none was active, so that the last
4378 * leaving stream may arm it.
4379 */
4380 if (!tick_isset(h2c->task->expire))
4381 h2c_update_timeout(h2c);
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004382 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004383 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004384
Willy Tarreau45f752e2017-10-30 15:44:59 +01004385 if ((h2c->flags & H2_CF_DEM_BLOCK_ANY && h2s->id == h2c->dsi) ||
4386 (h2c->flags & H2_CF_MUX_BLOCK_ANY && h2s->id == h2c->msi)) {
4387 /* unblock the connection if it was blocked on this
4388 * stream.
4389 */
4390 h2c->flags &= ~H2_CF_DEM_BLOCK_ANY;
4391 h2c->flags &= ~H2_CF_MUX_BLOCK_ANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004392 h2c_restart_reading(h2c, 1);
Willy Tarreau45f752e2017-10-30 15:44:59 +01004393 }
4394
Willy Tarreau71049cc2018-03-28 13:56:39 +02004395 h2s_destroy(h2s);
Willy Tarreau60935142017-10-16 18:11:19 +02004396
Christopher Faulet9b79a102019-07-15 11:22:56 +02004397 if (h2c->flags & H2_CF_IS_BACK) {
Olivier Houchard8a786902018-12-15 16:05:40 +01004398 if (!(h2c->conn->flags &
4399 (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH))) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004400 if (h2c->conn->flags & CO_FL_PRIVATE) {
Christopher Faulet08016ab2020-07-01 16:10:06 +02004401 /* Add the connection in the session server list, if not already done */
4402 if (!session_add_conn(sess, h2c->conn, h2c->conn->target)) {
4403 h2c->conn->owner = NULL;
4404 if (eb_is_empty(&h2c->streams_by_id)) {
4405 h2c->conn->mux->destroy(h2c);
4406 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4407 return;
Christopher Fauletc5579d12020-07-01 15:45:41 +02004408 }
4409 }
Christopher Faulet08016ab2020-07-01 16:10:06 +02004410 if (eb_is_empty(&h2c->streams_by_id)) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004411 if (session_check_idle_conn(h2c->conn->owner, h2c->conn) != 0) {
4412 /* At this point either the connection is destroyed, or it's been added to the server idle list, just stop */
4413 TRACE_DEVEL("leaving without reusable idle connection", H2_EV_STRM_END);
Olivier Houchard351411f2018-12-27 17:20:54 +01004414 return;
4415 }
4416 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004417 }
Christopher Fauletc5579d12020-07-01 15:45:41 +02004418 else {
4419 if (eb_is_empty(&h2c->streams_by_id)) {
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004420 /* If the connection is owned by the session, first remove it
4421 * from its list
4422 */
4423 if (h2c->conn->owner) {
4424 session_unown_conn(h2c->conn->owner, h2c->conn);
4425 h2c->conn->owner = NULL;
4426 }
4427
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004428 /* mark that the tasklet may lose its context to another thread and
4429 * that the handler needs to check it under the idle conns lock.
4430 */
4431 HA_ATOMIC_OR(&h2c->wait_event.tasklet->state, TASK_F_USR1);
Willy Tarreau4f8cd432021-03-02 17:27:58 +01004432 xprt_set_idle(h2c->conn, h2c->conn->xprt, h2c->conn->xprt_ctx);
4433
Olivier Houcharddc2f2752020-02-13 19:12:07 +01004434 if (!srv_add_to_idle_list(objt_server(h2c->conn->target), h2c->conn, 1)) {
Olivier Houchard2444aa52020-01-20 13:56:01 +01004435 /* The server doesn't want it, let's kill the connection right away */
4436 h2c->conn->mux->destroy(h2c);
4437 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4438 return;
4439 }
Olivier Houchard199d4fa2020-03-22 23:25:51 +01004440 /* At this point, the connection has been added to the
4441 * server idle list, so another thread may already have
4442 * hijacked it, so we can't do anything with it.
4443 */
Olivier Houchard2444aa52020-01-20 13:56:01 +01004444 TRACE_DEVEL("reusable idle connection", H2_EV_STRM_END);
4445 return;
Olivier Houchard8a786902018-12-15 16:05:40 +01004446
Olivier Houchard8a786902018-12-15 16:05:40 +01004447 }
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004448 else if (!h2c->conn->hash_node->node.node.leaf_p &&
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004449 h2_avail_streams(h2c->conn) > 0 && objt_server(h2c->conn->target) &&
Willy Tarreau2b718102021-04-21 07:32:39 +02004450 !LIST_INLIST(&h2c->conn->session_list)) {
Willy Tarreau430bf4a2021-03-04 09:45:32 +01004451 ebmb_insert(&__objt_server(h2c->conn->target)->per_thr[tid].avail_conns,
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004452 &h2c->conn->hash_node->node,
4453 sizeof(h2c->conn->hash_node->hash));
Christopher Fauletc5579d12020-07-01 15:45:41 +02004454 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004455 }
4456 }
4457 }
4458
Willy Tarreaue323f342018-03-28 13:51:45 +02004459 /* We don't want to close right now unless we're removing the
4460 * last stream, and either the connection is in error, or it
4461 * reached the ID already specified in a GOAWAY frame received
4462 * or sent (as seen by last_sid >= 0).
4463 */
Olivier Houchard7a977432019-03-21 15:47:13 +01004464 if (h2c_is_dead(h2c)) {
Willy Tarreaue323f342018-03-28 13:51:45 +02004465 /* no more stream will come, kill it now */
Willy Tarreau7838a792019-08-12 18:42:03 +02004466 TRACE_DEVEL("leaving and killing dead connection", H2_EV_STRM_END, h2c->conn);
Christopher Faulet73c12072019-04-08 11:23:22 +02004467 h2_release(h2c);
Willy Tarreaue323f342018-03-28 13:51:45 +02004468 }
4469 else if (h2c->task) {
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01004470 h2c_update_timeout(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004471 TRACE_DEVEL("leaving, refreshing connection's timeout", H2_EV_STRM_END, h2c->conn);
Willy Tarreau60935142017-10-16 18:11:19 +02004472 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004473 else
4474 TRACE_DEVEL("leaving", H2_EV_STRM_END, h2c->conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02004475}
4476
Willy Tarreau88bdba32019-05-13 18:17:53 +02004477/* Performs a synchronous or asynchronous shutr(). */
4478static void h2_do_shutr(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004479{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004480 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004481
Willy Tarreauf983d002019-05-14 10:40:21 +02004482 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004483 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004484
Willy Tarreau7838a792019-08-12 18:42:03 +02004485 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4486
Willy Tarreau18059042019-01-31 19:12:48 +01004487 /* a connstream may require us to immediately kill the whole connection
4488 * for example because of a "tcp-request content reject" rule that is
4489 * normally used to limit abuse. In this case we schedule a goaway to
4490 * close the connection.
Willy Tarreau926fa4c2017-11-07 14:42:12 +01004491 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004492 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004493 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004494 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004495 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4496 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4497 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004498 else if (!(h2s->flags & H2_SF_HEADERS_SENT)) {
4499 /* Nothing was never sent for this stream, so reset with
4500 * REFUSED_STREAM error to let the client retry the
4501 * request.
4502 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004503 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004504 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4505 }
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004506 else {
4507 /* a final response was already provided, we don't want this
4508 * stream anymore. This may happen when the server responds
4509 * before the end of an upload and closes quickly (redirect,
4510 * deny, ...)
4511 */
4512 h2s_error(h2s, H2_ERR_CANCEL);
4513 }
Willy Tarreau18059042019-01-31 19:12:48 +01004514
Willy Tarreau90c32322017-11-24 08:00:30 +01004515 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004516 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004517 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004518
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004519 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004520 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau00dd0782018-03-01 16:31:34 +01004521 h2s_close(h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004522 done:
4523 h2s->flags &= ~H2_SF_WANT_SHUTR;
Willy Tarreau7838a792019-08-12 18:42:03 +02004524 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004525 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004526add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004527 /* Let the handler know we want to shutr, and add ourselves to the
4528 * most relevant list if not yet done. h2_deferred_shut() will be
4529 * automatically called via the shut_tl tasklet when there's room
4530 * again.
4531 */
4532 h2s->flags |= H2_SF_WANT_SHUTR;
Willy Tarreau2b718102021-04-21 07:32:39 +02004533 if (!LIST_INLIST(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004534 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02004535 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004536 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Willy Tarreau2b718102021-04-21 07:32:39 +02004537 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004538 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004539 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004540 return;
Willy Tarreau62f52692017-10-08 23:01:42 +02004541}
4542
Willy Tarreau88bdba32019-05-13 18:17:53 +02004543/* Performs a synchronous or asynchronous shutw(). */
4544static void h2_do_shutw(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004545{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004546 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004547
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004548 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004549 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004550
Willy Tarreau7838a792019-08-12 18:42:03 +02004551 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4552
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004553 if (h2s->st != H2_SS_ERROR && (h2s->flags & H2_SF_HEADERS_SENT)) {
Willy Tarreau58e32082017-11-07 14:41:09 +01004554 /* we can cleanly close using an empty data frame only after headers */
4555
4556 if (!(h2s->flags & (H2_SF_ES_SENT|H2_SF_RST_SENT)) &&
4557 h2_send_empty_data_es(h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004558 goto add_to_list;
Willy Tarreau58e32082017-11-07 14:41:09 +01004559
4560 if (h2s->st == H2_SS_HREM)
Willy Tarreau00dd0782018-03-01 16:31:34 +01004561 h2s_close(h2s);
Willy Tarreau58e32082017-11-07 14:41:09 +01004562 else
4563 h2s->st = H2_SS_HLOC;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004564 } else {
Willy Tarreau18059042019-01-31 19:12:48 +01004565 /* a connstream may require us to immediately kill the whole connection
4566 * for example because of a "tcp-request content reject" rule that is
4567 * normally used to limit abuse. In this case we schedule a goaway to
4568 * close the connection.
Willy Tarreaua1349f02017-10-31 07:41:55 +01004569 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004570 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004571 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004572 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004573 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4574 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4575 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004576 else {
4577 /* Nothing was never sent for this stream, so reset with
4578 * REFUSED_STREAM error to let the client retry the
4579 * request.
4580 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004581 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004582 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4583 }
Willy Tarreau18059042019-01-31 19:12:48 +01004584
Willy Tarreau90c32322017-11-24 08:00:30 +01004585 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004586 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004587 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004588
Willy Tarreau00dd0782018-03-01 16:31:34 +01004589 h2s_close(h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004590 }
4591
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004592 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004593 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau7838a792019-08-12 18:42:03 +02004594
4595 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
4596
Willy Tarreau88bdba32019-05-13 18:17:53 +02004597 done:
4598 h2s->flags &= ~H2_SF_WANT_SHUTW;
4599 return;
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004600
4601 add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004602 /* Let the handler know we want to shutw, and add ourselves to the
4603 * most relevant list if not yet done. h2_deferred_shut() will be
4604 * automatically called via the shut_tl tasklet when there's room
4605 * again.
4606 */
4607 h2s->flags |= H2_SF_WANT_SHUTW;
Willy Tarreau2b718102021-04-21 07:32:39 +02004608 if (!LIST_INLIST(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004609 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02004610 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004611 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Willy Tarreau2b718102021-04-21 07:32:39 +02004612 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004613 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004614 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004615 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004616}
4617
Willy Tarreau5723f292020-01-10 15:16:57 +01004618/* This is the tasklet referenced in h2s->shut_tl, it is used for
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004619 * deferred shutdowns when the h2_detach() was done but the mux buffer was full
4620 * and prevented the last frame from being emitted.
4621 */
Willy Tarreau144f84a2021-03-02 16:09:26 +01004622struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned int state)
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004623{
4624 struct h2s *h2s = ctx;
Willy Tarreau88bdba32019-05-13 18:17:53 +02004625 struct h2c *h2c = h2s->h2c;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004626
Willy Tarreau7838a792019-08-12 18:42:03 +02004627 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4628
Willy Tarreau5723f292020-01-10 15:16:57 +01004629 if (h2s->flags & H2_SF_NOTIFIED) {
4630 /* some data processing remains to be done first */
4631 goto end;
4632 }
4633
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004634 if (h2s->flags & H2_SF_WANT_SHUTW)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004635 h2_do_shutw(h2s);
4636
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004637 if (h2s->flags & H2_SF_WANT_SHUTR)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004638 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004639
Willy Tarreau88bdba32019-05-13 18:17:53 +02004640 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004641 /* We're done trying to send, remove ourself from the send_list */
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004642 LIST_DEL_INIT(&h2s->list);
Olivier Houchard7a977432019-03-21 15:47:13 +01004643
Willy Tarreau88bdba32019-05-13 18:17:53 +02004644 if (!h2s->cs) {
4645 h2s_destroy(h2s);
Willy Tarreau74163142021-03-13 11:30:19 +01004646 if (h2c_is_dead(h2c)) {
Willy Tarreau88bdba32019-05-13 18:17:53 +02004647 h2_release(h2c);
Willy Tarreau74163142021-03-13 11:30:19 +01004648 t = NULL;
4649 }
Willy Tarreau88bdba32019-05-13 18:17:53 +02004650 }
Olivier Houchard7a977432019-03-21 15:47:13 +01004651 }
Willy Tarreau5723f292020-01-10 15:16:57 +01004652 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02004653 TRACE_LEAVE(H2_EV_STRM_SHUT);
Willy Tarreau74163142021-03-13 11:30:19 +01004654 return t;
Willy Tarreau62f52692017-10-08 23:01:42 +02004655}
4656
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004657/* shutr() called by the conn_stream (mux_ops.shutr) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004658static void h2_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
4659{
4660 struct h2s *h2s = cs->ctx;
4661
Willy Tarreau7838a792019-08-12 18:42:03 +02004662 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004663 if (cs->flags & CS_FL_KILL_CONN)
4664 h2s->flags |= H2_SF_KILL_CONN;
4665
Willy Tarreau7838a792019-08-12 18:42:03 +02004666 if (mode)
4667 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004668
Willy Tarreau7838a792019-08-12 18:42:03 +02004669 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004670}
4671
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004672/* shutw() called by the conn_stream (mux_ops.shutw) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004673static void h2_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
4674{
4675 struct h2s *h2s = cs->ctx;
4676
Willy Tarreau7838a792019-08-12 18:42:03 +02004677 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004678 if (cs->flags & CS_FL_KILL_CONN)
4679 h2s->flags |= H2_SF_KILL_CONN;
4680
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004681 h2_do_shutw(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02004682 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004683}
4684
Christopher Faulet9b79a102019-07-15 11:22:56 +02004685/* Decode the payload of a HEADERS frame and produce the HTX request or response
4686 * depending on the connection's side. Returns a positive value on success, a
4687 * negative value on failure, or 0 if it couldn't proceed. May report connection
4688 * errors in h2c->errcode if the frame is non-decodable and the connection
4689 * unrecoverable. In absence of connection error when a failure is reported, the
4690 * caller must assume a stream error.
Willy Tarreauea18f862018-12-22 20:19:26 +01004691 *
4692 * The function may fold CONTINUATION frames into the initial HEADERS frame
4693 * by removing padding and next frame header, then moving the CONTINUATION
4694 * frame's payload and adjusting h2c->dfl to match the new aggregated frame,
4695 * leaving a hole between the main frame and the beginning of the next one.
4696 * The possibly remaining incomplete or next frame at the end may be moved
4697 * if the aggregated frame is not deleted, in order to fill the hole. Wrapped
4698 * HEADERS frames are unwrapped into a temporary buffer before decoding.
4699 *
4700 * A buffer at the beginning of processing may look like this :
4701 *
4702 * ,---.---------.-----.--------------.--------------.------.---.
4703 * |///| HEADERS | PAD | CONTINUATION | CONTINUATION | DATA |///|
4704 * `---^---------^-----^--------------^--------------^------^---'
4705 * | | <-----> | |
4706 * area | dpl | wrap
4707 * |<--------------> |
4708 * | dfl |
4709 * |<-------------------------------------------------->|
4710 * head data
4711 *
4712 * Padding is automatically overwritten when folding, participating to the
4713 * hole size after dfl :
4714 *
4715 * ,---.------------------------.-----.--------------.------.---.
4716 * |///| HEADERS : CONTINUATION |/////| CONTINUATION | DATA |///|
4717 * `---^------------------------^-----^--------------^------^---'
4718 * | | <-----> | |
4719 * area | hole | wrap
4720 * |<-----------------------> |
4721 * | dfl |
4722 * |<-------------------------------------------------->|
4723 * head data
4724 *
4725 * Please note that the HEADERS frame is always deprived from its PADLEN byte
4726 * however it may start with the 5 stream-dep+weight bytes in case of PRIORITY
4727 * bit.
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004728 *
4729 * The <flags> field must point to either the stream's flags or to a copy of it
4730 * so that the function can update the following flags :
4731 * - H2_SF_DATA_CLEN when content-length is seen
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004732 * - H2_SF_HEADERS_RCVD once the frame is successfully decoded
Willy Tarreau88d138e2019-01-02 19:38:14 +01004733 *
4734 * The H2_SF_HEADERS_RCVD flag is also looked at in the <flags> field prior to
4735 * decoding, in order to detect if we're dealing with a headers or a trailers
4736 * block (the trailers block appears after H2_SF_HEADERS_RCVD was seen).
Willy Tarreau13278b42017-10-13 19:23:14 +02004737 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01004738static 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 +02004739{
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004740 const uint8_t *hdrs = (uint8_t *)b_head(&h2c->dbuf);
Willy Tarreau83061a82018-07-13 11:56:34 +02004741 struct buffer *tmp = get_trash_chunk();
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004742 struct http_hdr list[global.tune.max_http_hdr * 2];
Willy Tarreau83061a82018-07-13 11:56:34 +02004743 struct buffer *copy = NULL;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004744 unsigned int msgf;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004745 struct htx *htx = NULL;
Willy Tarreauea18f862018-12-22 20:19:26 +01004746 int flen; // header frame len
4747 int hole = 0;
Willy Tarreau86277d42019-01-02 15:36:11 +01004748 int ret = 0;
4749 int outlen;
Willy Tarreau13278b42017-10-13 19:23:14 +02004750 int wrap;
Willy Tarreau13278b42017-10-13 19:23:14 +02004751
Willy Tarreau7838a792019-08-12 18:42:03 +02004752 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
4753
Willy Tarreauea18f862018-12-22 20:19:26 +01004754next_frame:
4755 if (b_data(&h2c->dbuf) - hole < h2c->dfl)
4756 goto leave; // incomplete input frame
4757
4758 /* No END_HEADERS means there's one or more CONTINUATION frames. In
4759 * this case, we'll try to paste it immediately after the initial
4760 * HEADERS frame payload and kill any possible padding. The initial
4761 * frame's length will be increased to represent the concatenation
4762 * of the two frames. The next frame is read from position <tlen>
4763 * and written at position <flen> (minus padding if some is present).
4764 */
4765 if (unlikely(!(h2c->dff & H2_F_HEADERS_END_HEADERS))) {
4766 struct h2_fh hdr;
4767 int clen; // CONTINUATION frame's payload length
4768
Willy Tarreau7838a792019-08-12 18:42:03 +02004769 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 +01004770 if (!h2_peek_frame_hdr(&h2c->dbuf, h2c->dfl + hole, &hdr)) {
4771 /* no more data, the buffer may be full, either due to
4772 * too large a frame or because of too large a hole that
4773 * we're going to compact at the end.
4774 */
4775 goto leave;
4776 }
4777
4778 if (hdr.ft != H2_FT_CONTINUATION) {
4779 /* RFC7540#6.10: frame of unexpected type */
Willy Tarreau7838a792019-08-12 18:42:03 +02004780 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 +01004781 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004782 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreauea18f862018-12-22 20:19:26 +01004783 goto fail;
4784 }
4785
4786 if (hdr.sid != h2c->dsi) {
4787 /* RFC7540#6.10: frame of different stream */
Willy Tarreau7838a792019-08-12 18:42:03 +02004788 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 +01004789 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004790 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreauea18f862018-12-22 20:19:26 +01004791 goto fail;
4792 }
4793
4794 if ((unsigned)hdr.len > (unsigned)global.tune.bufsize) {
4795 /* RFC7540#4.2: invalid frame length */
Willy Tarreau7838a792019-08-12 18:42:03 +02004796 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 +01004797 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4798 goto fail;
4799 }
4800
4801 /* detect when we must stop aggragating frames */
4802 h2c->dff |= hdr.ff & H2_F_HEADERS_END_HEADERS;
4803
4804 /* Take as much as we can of the CONTINUATION frame's payload */
4805 clen = b_data(&h2c->dbuf) - (h2c->dfl + hole + 9);
4806 if (clen > hdr.len)
4807 clen = hdr.len;
4808
4809 /* Move the frame's payload over the padding, hole and frame
4810 * header. At least one of hole or dpl is null (see diagrams
4811 * above). The hole moves after the new aggragated frame.
4812 */
4813 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 +02004814 h2c->dfl += hdr.len - h2c->dpl;
Willy Tarreauea18f862018-12-22 20:19:26 +01004815 hole += h2c->dpl + 9;
4816 h2c->dpl = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004817 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 +01004818 goto next_frame;
4819 }
4820
4821 flen = h2c->dfl - h2c->dpl;
Willy Tarreau68472622017-12-11 18:36:37 +01004822
Willy Tarreau13278b42017-10-13 19:23:14 +02004823 /* if the input buffer wraps, take a temporary copy of it (rare) */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004824 wrap = b_wrap(&h2c->dbuf) - b_head(&h2c->dbuf);
Willy Tarreau13278b42017-10-13 19:23:14 +02004825 if (wrap < h2c->dfl) {
Willy Tarreau68dd9852017-07-03 14:44:26 +02004826 copy = alloc_trash_chunk();
4827 if (!copy) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004828 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 +02004829 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
4830 goto fail;
4831 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004832 memcpy(copy->area, b_head(&h2c->dbuf), wrap);
4833 memcpy(copy->area + wrap, b_orig(&h2c->dbuf), h2c->dfl - wrap);
4834 hdrs = (uint8_t *) copy->area;
Willy Tarreau13278b42017-10-13 19:23:14 +02004835 }
4836
Willy Tarreau13278b42017-10-13 19:23:14 +02004837 /* Skip StreamDep and weight for now (we don't support PRIORITY) */
4838 if (h2c->dff & H2_F_HEADERS_PRIORITY) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004839 if (read_n32(hdrs) == h2c->dsi) {
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004840 /* RFC7540#5.3.1 : stream dep may not depend on itself */
Willy Tarreau7838a792019-08-12 18:42:03 +02004841 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 +01004842 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004843 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreaua0d11b62018-09-05 18:30:05 +02004844 goto fail;
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004845 }
4846
Willy Tarreaua01f45e2018-12-31 07:41:24 +01004847 if (flen < 5) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004848 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 +01004849 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4850 goto fail;
4851 }
4852
Willy Tarreau13278b42017-10-13 19:23:14 +02004853 hdrs += 5; // stream dep = 4, weight = 1
4854 flen -= 5;
4855 }
4856
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004857 if (!h2_get_buf(h2c, rxbuf)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004858 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 +01004859 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau86277d42019-01-02 15:36:11 +01004860 goto leave;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004861 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004862
Willy Tarreau937f7602018-02-26 15:22:17 +01004863 /* we can't retry a failed decompression operation so we must be very
4864 * careful not to take any risks. In practice the output buffer is
4865 * always empty except maybe for trailers, in which case we simply have
4866 * to wait for the upper layer to finish consuming what is available.
4867 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004868 htx = htx_from_buf(rxbuf);
4869 if (!htx_is_empty(htx)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004870 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 +02004871 h2c->flags |= H2_CF_DEM_SFULL;
4872 goto leave;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004873 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004874
Willy Tarreau25919232019-01-03 14:48:18 +01004875 /* past this point we cannot roll back in case of error */
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004876 outlen = hpack_decode_frame(h2c->ddht, hdrs, flen, list,
4877 sizeof(list)/sizeof(list[0]), tmp);
4878 if (outlen < 0) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004879 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 +01004880 h2c_error(h2c, H2_ERR_COMPRESSION_ERROR);
4881 goto fail;
4882 }
4883
Willy Tarreau25919232019-01-03 14:48:18 +01004884 /* The PACK decompressor was updated, let's update the input buffer and
4885 * the parser's state to commit these changes and allow us to later
4886 * fail solely on the stream if needed.
4887 */
4888 b_del(&h2c->dbuf, h2c->dfl + hole);
4889 h2c->dfl = hole = 0;
4890 h2c->st0 = H2_CS_FRAME_H;
4891
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004892 /* OK now we have our header list in <list> */
Willy Tarreau880f5802019-01-03 08:10:14 +01004893 msgf = (h2c->dff & H2_F_HEADERS_END_STREAM) ? 0 : H2_MSGF_BODY;
Christopher Fauletd0db4232021-01-22 11:46:30 +01004894 msgf |= (*flags & H2_SF_BODY_TUNNEL) ? H2_MSGF_BODY_TUNNEL: 0;
Amaury Denoyelle74162742020-12-11 17:53:05 +01004895 /* If an Extended CONNECT has been sent on this stream, set message flag
Ilya Shipitsinacf84592021-02-06 22:29:08 +05004896 * to convert 200 response to 101 htx response */
Amaury Denoyelle74162742020-12-11 17:53:05 +01004897 msgf |= (*flags & H2_SF_EXT_CONNECT_SENT) ? H2_MSGF_EXT_CONNECT: 0;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004898
Willy Tarreau88d138e2019-01-02 19:38:14 +01004899 if (*flags & H2_SF_HEADERS_RCVD)
4900 goto trailers;
4901
4902 /* This is the first HEADERS frame so it's a headers block */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004903 if (h2c->flags & H2_CF_IS_BACK)
Amaury Denoyelle74162742020-12-11 17:53:05 +01004904 outlen = h2_make_htx_response(list, htx, &msgf, body_len, upgrade_protocol);
Christopher Faulet9b79a102019-07-15 11:22:56 +02004905 else
4906 outlen = h2_make_htx_request(list, htx, &msgf, body_len);
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004907
Christopher Faulet3d875582021-04-26 17:46:13 +02004908 if (outlen < 0 || htx_free_space(htx) < global.tune.maxrewrite) {
Willy Tarreau25919232019-01-03 14:48:18 +01004909 /* too large headers? this is a stream error only */
Christopher Faulet3d875582021-04-26 17:46:13 +02004910 TRACE_STATE("message headers too large", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2S_ERR|H2_EV_PROTO_ERR, h2c->conn);
4911 htx->flags |= HTX_FL_PARSING_ERROR;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004912 goto fail;
4913 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004914
Willy Tarreau174b06a2018-04-25 18:13:58 +02004915 if (msgf & H2_MSGF_BODY) {
4916 /* a payload is present */
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004917 if (msgf & H2_MSGF_BODY_CL) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004918 *flags |= H2_SF_DATA_CLEN;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004919 htx->extra = *body_len;
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004920 }
Willy Tarreau174b06a2018-04-25 18:13:58 +02004921 }
Christopher Faulet7d247f02020-12-02 14:26:36 +01004922 if (msgf & H2_MSGF_BODYLESS_RSP)
4923 *flags |= H2_SF_BODYLESS_RESP;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004924
Christopher Fauletd0db4232021-01-22 11:46:30 +01004925 if (msgf & H2_MSGF_BODY_TUNNEL)
4926 *flags |= H2_SF_BODY_TUNNEL;
4927 else {
4928 /* Abort the tunnel attempt, if any */
4929 if (*flags & H2_SF_BODY_TUNNEL)
4930 *flags |= H2_SF_TUNNEL_ABRT;
4931 *flags &= ~H2_SF_BODY_TUNNEL;
4932 }
4933
Willy Tarreau88d138e2019-01-02 19:38:14 +01004934 done:
Christopher Faulet0b465482019-02-19 15:14:23 +01004935 /* indicate that a HEADERS frame was received for this stream, except
4936 * for 1xx responses. For 1xx responses, another HEADERS frame is
4937 * expected.
4938 */
4939 if (!(msgf & H2_MSGF_RSP_1XX))
4940 *flags |= H2_SF_HEADERS_RCVD;
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004941
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004942 if (h2c->dff & H2_F_HEADERS_END_STREAM) {
4943 /* no more data are expected for this message */
4944 htx->flags |= HTX_FL_EOM;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004945 }
Willy Tarreau937f7602018-02-26 15:22:17 +01004946
Amaury Denoyelleefe22762020-12-11 17:53:08 +01004947 if (msgf & H2_MSGF_EXT_CONNECT)
4948 *flags |= H2_SF_EXT_CONNECT_RCVD;
4949
Willy Tarreau86277d42019-01-02 15:36:11 +01004950 /* success */
4951 ret = 1;
4952
Willy Tarreau68dd9852017-07-03 14:44:26 +02004953 leave:
Willy Tarreau86277d42019-01-02 15:36:11 +01004954 /* If there is a hole left and it's not at the end, we are forced to
Willy Tarreauea18f862018-12-22 20:19:26 +01004955 * move the remaining data over it.
4956 */
4957 if (hole) {
4958 if (b_data(&h2c->dbuf) > h2c->dfl + hole)
4959 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole),
4960 b_data(&h2c->dbuf) - (h2c->dfl + hole), -hole);
4961 b_sub(&h2c->dbuf, hole);
4962 }
4963
Christopher Faulet07f88d72021-04-21 10:39:53 +02004964 if (b_full(&h2c->dbuf) && h2c->dfl) {
Willy Tarreauea18f862018-12-22 20:19:26 +01004965 /* too large frames */
4966 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau86277d42019-01-02 15:36:11 +01004967 ret = -1;
Willy Tarreauea18f862018-12-22 20:19:26 +01004968 }
4969
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004970 if (htx)
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004971 htx_to_buf(htx, rxbuf);
Willy Tarreau68dd9852017-07-03 14:44:26 +02004972 free_trash_chunk(copy);
Willy Tarreau7838a792019-08-12 18:42:03 +02004973 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau86277d42019-01-02 15:36:11 +01004974 return ret;
4975
Willy Tarreau68dd9852017-07-03 14:44:26 +02004976 fail:
Willy Tarreau86277d42019-01-02 15:36:11 +01004977 ret = -1;
Willy Tarreau68dd9852017-07-03 14:44:26 +02004978 goto leave;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004979
4980 trailers:
4981 /* This is the last HEADERS frame hence a trailer */
Willy Tarreau88d138e2019-01-02 19:38:14 +01004982 if (!(h2c->dff & H2_F_HEADERS_END_STREAM)) {
4983 /* It's a trailer but it's missing ES flag */
Willy Tarreau7838a792019-08-12 18:42:03 +02004984 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 +01004985 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004986 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau88d138e2019-01-02 19:38:14 +01004987 goto fail;
4988 }
4989
Christopher Faulet9b79a102019-07-15 11:22:56 +02004990 /* Trailers terminate a DATA sequence */
Willy Tarreau7838a792019-08-12 18:42:03 +02004991 if (h2_make_htx_trailers(list, htx) <= 0) {
4992 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 +02004993 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004994 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01004995 goto done;
Willy Tarreau13278b42017-10-13 19:23:14 +02004996}
4997
Christopher Faulet9b79a102019-07-15 11:22:56 +02004998/* Transfer the payload of a DATA frame to the HTTP/1 side. The HTTP/2 frame
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004999 * parser state is automatically updated. Returns > 0 if it could completely
5000 * send the current frame, 0 if it couldn't complete, in which case
5001 * CS_FL_RCV_MORE must be checked to know if some data remain pending (an empty
5002 * DATA frame can return 0 as a valid result). Stream errors are reported in
5003 * h2s->errcode and connection errors in h2c->errcode. The caller must already
5004 * have checked the frame header and ensured that the frame was complete or the
5005 * buffer full. It changes the frame state to FRAME_A once done.
Willy Tarreau454f9052017-10-26 19:40:35 +02005006 */
Willy Tarreau454b57b2018-02-26 15:50:05 +01005007static int h2_frt_transfer_data(struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02005008{
5009 struct h2c *h2c = h2s->h2c;
Christopher Faulet9b79a102019-07-15 11:22:56 +02005010 int block;
Willy Tarreaud755ea62018-02-26 15:44:54 +01005011 unsigned int flen = 0;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005012 struct htx *htx = NULL;
Willy Tarreaud755ea62018-02-26 15:44:54 +01005013 struct buffer *csbuf;
Christopher Faulet9b79a102019-07-15 11:22:56 +02005014 unsigned int sent;
Willy Tarreau454f9052017-10-26 19:40:35 +02005015
Willy Tarreau7838a792019-08-12 18:42:03 +02005016 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
5017
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005018 h2c->flags &= ~H2_CF_DEM_SFULL;
Willy Tarreau454f9052017-10-26 19:40:35 +02005019
Olivier Houchard638b7992018-08-16 15:41:52 +02005020 csbuf = h2_get_buf(h2c, &h2s->rxbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01005021 if (!csbuf) {
5022 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02005023 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 +01005024 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01005025 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02005026 htx = htx_from_buf(csbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01005027
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005028try_again:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005029 flen = h2c->dfl - h2c->dpl;
5030 if (!flen)
Willy Tarreau4a28da12018-01-04 14:41:00 +01005031 goto end_transfer;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005032
Willy Tarreauc9fa0482018-07-10 17:43:27 +02005033 if (flen > b_data(&h2c->dbuf)) {
5034 flen = b_data(&h2c->dbuf);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005035 if (!flen)
Willy Tarreau454b57b2018-02-26 15:50:05 +01005036 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01005037 }
5038
Christopher Faulet9b79a102019-07-15 11:22:56 +02005039 block = htx_free_data_space(htx);
5040 if (!block) {
5041 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005042 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 +02005043 goto fail;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005044 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02005045 if (flen > block)
5046 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005047
Christopher Faulet9b79a102019-07-15 11:22:56 +02005048 /* here, flen is the max we can copy into the output buffer */
5049 block = b_contig_data(&h2c->dbuf, 0);
5050 if (flen > block)
5051 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005052
Christopher Faulet9b79a102019-07-15 11:22:56 +02005053 sent = htx_add_data(htx, ist2(b_head(&h2c->dbuf), flen));
Willy Tarreau022e5e52020-09-10 09:33:15 +02005054 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 +02005055
Christopher Faulet9b79a102019-07-15 11:22:56 +02005056 b_del(&h2c->dbuf, sent);
5057 h2c->dfl -= sent;
5058 h2c->rcvd_c += sent;
5059 h2c->rcvd_s += sent; // warning, this can also affect the closed streams!
Willy Tarreau454f9052017-10-26 19:40:35 +02005060
Christopher Faulet9b79a102019-07-15 11:22:56 +02005061 if (h2s->flags & H2_SF_DATA_CLEN) {
5062 h2s->body_len -= sent;
5063 htx->extra = h2s->body_len;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005064 }
5065
Christopher Faulet9b79a102019-07-15 11:22:56 +02005066 if (sent < flen) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01005067 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005068 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 +01005069 goto fail;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005070 }
5071
Christopher Faulet9b79a102019-07-15 11:22:56 +02005072 goto try_again;
5073
Willy Tarreau4a28da12018-01-04 14:41:00 +01005074 end_transfer:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005075 /* here we're done with the frame, all the payload (except padding) was
5076 * transferred.
5077 */
Willy Tarreaueba10f22018-04-25 20:44:22 +02005078
Christopher Faulet5be651d2021-01-22 15:28:03 +01005079 if (!(h2s->flags & H2_SF_BODY_TUNNEL) && (h2c->dff & H2_F_DATA_END_STREAM)) {
5080 /* no more data are expected for this message. This add the EOM
5081 * flag but only on the response path or if no tunnel attempt
5082 * was aborted. Otherwise (request path + tunnel abrted), the
5083 * EOM was already reported.
5084 */
Christopher Faulet33724322021-02-10 09:04:59 +01005085 if ((h2c->flags & H2_CF_IS_BACK) || !(h2s->flags & H2_SF_TUNNEL_ABRT)) {
5086 /* If we receive an empty DATA frame with ES flag while the HTX
5087 * message is empty, we must be sure to push a block to be sure
5088 * the HTX EOM flag will be handled on the other side. It is a
5089 * workaround because for now it is not possible to push empty
5090 * HTX DATA block. And without this block, there is no way to
5091 * "commit" the end of the message.
5092 */
5093 if (htx_is_empty(htx)) {
5094 if (!htx_add_endof(htx, HTX_BLK_EOT))
5095 goto fail;
5096 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005097 htx->flags |= HTX_FL_EOM;
Christopher Faulet33724322021-02-10 09:04:59 +01005098 }
Willy Tarreaueba10f22018-04-25 20:44:22 +02005099 }
5100
Willy Tarreaud1023bb2018-03-22 16:53:12 +01005101 h2c->rcvd_c += h2c->dpl;
5102 h2c->rcvd_s += h2c->dpl;
5103 h2c->dpl = 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02005104 h2c->st0 = H2_CS_FRAME_A; // send the corresponding window update
Christopher Faulet9b79a102019-07-15 11:22:56 +02005105 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02005106 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005107 return 1;
Willy Tarreau454b57b2018-02-26 15:50:05 +01005108 fail:
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005109 if (htx)
5110 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02005111 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454b57b2018-02-26 15:50:05 +01005112 return 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02005113}
5114
Willy Tarreau115e83b2018-12-01 19:17:53 +01005115/* Try to send a HEADERS frame matching HTX response present in HTX message
5116 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
5117 * must check the stream's status to detect any error which might have happened
5118 * subsequently to a successful send. The htx blocks are automatically removed
5119 * from the message. The htx message is assumed to be valid since produced from
5120 * the internal code, hence it contains a start line, an optional series of
5121 * header blocks and an end of header, otherwise an invalid frame could be
5122 * emitted and the resulting htx message could be left in an inconsistent state.
5123 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005124static size_t h2s_frt_make_resp_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005125{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005126 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau115e83b2018-12-01 19:17:53 +01005127 struct h2c *h2c = h2s->h2c;
5128 struct htx_blk *blk;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005129 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005130 struct buffer *mbuf;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005131 struct htx_sl *sl;
5132 enum htx_blk_type type;
5133 int es_now = 0;
5134 int ret = 0;
5135 int hdr;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005136
Willy Tarreau7838a792019-08-12 18:42:03 +02005137 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5138
Willy Tarreau115e83b2018-12-01 19:17:53 +01005139 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005140 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005141 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005142 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005143 return 0;
5144 }
5145
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005146 /* get the start line (we do have one) and the rest of the headers,
5147 * that we dump starting at header 0 */
5148 sl = NULL;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005149 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005150 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau115e83b2018-12-01 19:17:53 +01005151 type = htx_get_blk_type(blk);
5152
5153 if (type == HTX_BLK_UNUSED)
5154 continue;
5155
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005156 if (type == HTX_BLK_EOH)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005157 break;
5158
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005159 if (type == HTX_BLK_HDR) {
Christopher Faulet56498132021-01-29 11:39:43 +01005160 BUG_ON(!sl); /* The start-line mut be defined before any headers */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005161 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5162 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5163 goto fail;
5164 }
5165
5166 list[hdr].n = htx_get_blk_name(htx, blk);
5167 list[hdr].v = htx_get_blk_value(htx, blk);
5168 hdr++;
5169 }
5170 else if (type == HTX_BLK_RES_SL) {
Christopher Faulet56498132021-01-29 11:39:43 +01005171 BUG_ON(sl); /* Only one start-line expected */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005172 sl = htx_get_blk_ptr(htx, blk);
5173 h2s->status = sl->info.res.status;
Christopher Faulet7d247f02020-12-02 14:26:36 +01005174 if (h2s->status == 204 || h2s->status == 304)
5175 h2s->flags |= H2_SF_BODYLESS_RESP;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005176 if (h2s->status < 100 || h2s->status > 999) {
5177 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5178 goto fail;
5179 }
5180 else if (h2s->status == 101) {
Amaury Denoyelleefe22762020-12-11 17:53:08 +01005181 if (unlikely(h2s->flags & H2_SF_EXT_CONNECT_RCVD)) {
5182 /* If an Extended CONNECT has been received, we need to convert 101 to 200 */
5183 h2s->status = 200;
5184 h2s->flags &= ~H2_SF_EXT_CONNECT_RCVD;
5185 }
5186 else {
5187 /* Otherwise, 101 responses are not supported in H2, so return a error (RFC7540#8.1.1) */
5188 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5189 goto fail;
5190 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005191 }
5192 else if ((h2s->flags & H2_SF_BODY_TUNNEL) && h2s->status >= 300) {
5193 /* Abort the tunnel attempt */
5194 h2s->flags &= ~H2_SF_BODY_TUNNEL;
5195 h2s->flags |= H2_SF_TUNNEL_ABRT;
5196 }
5197 }
5198 else {
5199 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 +01005200 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005201 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005202 }
5203
Christopher Faulet56498132021-01-29 11:39:43 +01005204 /* The start-line me be defined */
5205 BUG_ON(!sl);
5206
Willy Tarreau115e83b2018-12-01 19:17:53 +01005207 /* marker for end of headers */
5208 list[hdr].n = ist("");
5209
Willy Tarreau9c218e72019-05-26 10:08:28 +02005210 mbuf = br_tail(h2c->mbuf);
5211 retry:
5212 if (!h2_get_buf(h2c, mbuf)) {
5213 h2c->flags |= H2_CF_MUX_MALLOC;
5214 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005215 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 +02005216 return 0;
5217 }
5218
Willy Tarreau115e83b2018-12-01 19:17:53 +01005219 chunk_reset(&outbuf);
5220
5221 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005222 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5223 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005224 break;
5225 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005226 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau115e83b2018-12-01 19:17:53 +01005227 }
5228
5229 if (outbuf.size < 9)
5230 goto full;
5231
5232 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5233 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5234 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5235 outbuf.data = 9;
5236
Willy Tarreau8a4dca02022-01-13 16:00:12 +01005237 if ((h2c->flags & (H2_CF_SHTS_UPDATED|H2_CF_DTSU_EMITTED)) == H2_CF_SHTS_UPDATED) {
5238 /* SETTINGS_HEADER_TABLE_SIZE changed, we must send an HPACK
5239 * dynamic table size update so that some clients are not
5240 * confused. In practice we only need to send the DTSU when the
5241 * advertised size is lower than the current one, and since we
5242 * don't use it and don't care about the default 4096 bytes,
5243 * we only ack it with a zero size thus we at most have to deal
5244 * with this once. See RFC7541#4.2 and #6.3 for the spec, and
5245 * below for the whole context and interoperability risks:
5246 * https://lists.w3.org/Archives/Public/ietf-http-wg/2021OctDec/0235.html
5247 */
5248 if (b_room(&outbuf) < 1)
5249 goto full;
5250 outbuf.area[outbuf.data++] = 0x20; // HPACK DTSU 0 bytes
5251
5252 /* let's not update the flags now but only once the buffer is
5253 * really committed.
5254 */
5255 }
5256
Willy Tarreau115e83b2018-12-01 19:17:53 +01005257 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01005258 if (!hpack_encode_int_status(&outbuf, h2s->status)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005259 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005260 goto realign_again;
5261 goto full;
5262 }
5263
5264 /* encode all headers, stop at empty name */
5265 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
5266 /* these ones do not exist in H2 and must be dropped. */
5267 if (isteq(list[hdr].n, ist("connection")) ||
5268 isteq(list[hdr].n, ist("proxy-connection")) ||
5269 isteq(list[hdr].n, ist("keep-alive")) ||
5270 isteq(list[hdr].n, ist("upgrade")) ||
5271 isteq(list[hdr].n, ist("transfer-encoding")))
5272 continue;
5273
Christopher Faulet86d144c2019-08-14 16:32:25 +02005274 /* Skip all pseudo-headers */
5275 if (*(list[hdr].n.ptr) == ':')
5276 continue;
5277
Willy Tarreau115e83b2018-12-01 19:17:53 +01005278 if (isteq(list[hdr].n, ist("")))
5279 break; // end
5280
5281 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
5282 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005283 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005284 goto realign_again;
5285 goto full;
5286 }
5287 }
5288
Willy Tarreaucb985a42019-10-07 16:56:34 +02005289 /* update the frame's size */
5290 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5291
5292 if (outbuf.data > h2c->mfs + 9) {
5293 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5294 /* output full */
5295 if (b_space_wraps(mbuf))
5296 goto realign_again;
5297 goto full;
5298 }
5299 }
5300
Willy Tarreau38b5bec2021-06-17 08:40:04 +02005301 TRACE_USER("sent H2 response ", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
5302
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005303 /* remove all header blocks including the EOH and compute the
5304 * corresponding size.
Willy Tarreau115e83b2018-12-01 19:17:53 +01005305 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005306 ret = 0;
5307 blk = htx_get_head_blk(htx);
5308 while (blk) {
5309 type = htx_get_blk_type(blk);
5310 ret += htx_get_blksz(blk);
5311 blk = htx_remove_blk(htx, blk);
5312 /* The removed block is the EOH */
5313 if (type == HTX_BLK_EOH)
5314 break;
Christopher Faulet5be651d2021-01-22 15:28:03 +01005315 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005316
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005317 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW) {
5318 /* Response already closed: add END_STREAM */
5319 es_now = 1;
5320 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005321 else if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx) && h2s->status >= 200) {
5322 /* EOM+empty: we may need to add END_STREAM except for 1xx
Christopher Faulet991febd2020-12-02 15:17:31 +01005323 * responses and tunneled response.
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005324 */
Christopher Faulet991febd2020-12-02 15:17:31 +01005325 if (!(h2s->flags & H2_SF_BODY_TUNNEL) || h2s->status >= 300)
5326 es_now = 1;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005327 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005328
Willy Tarreau115e83b2018-12-01 19:17:53 +01005329 if (es_now)
5330 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5331
5332 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005333 b_add(mbuf, outbuf.data);
Christopher Faulet0b465482019-02-19 15:14:23 +01005334
5335 /* indicates the HEADERS frame was sent, except for 1xx responses. For
5336 * 1xx responses, another HEADERS frame is expected.
5337 */
Christopher Faulet89899422020-12-07 18:24:43 +01005338 if (h2s->status >= 200)
Christopher Faulet0b465482019-02-19 15:14:23 +01005339 h2s->flags |= H2_SF_HEADERS_SENT;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005340
Willy Tarreau8a4dca02022-01-13 16:00:12 +01005341 if (h2c->flags & H2_CF_SHTS_UPDATED) {
5342 /* was sent above */
5343 h2c->flags |= H2_CF_DTSU_EMITTED;
Willy Tarreaub05f4dd2022-02-16 14:28:14 +01005344 h2c->flags &= ~H2_CF_SHTS_UPDATED;
Willy Tarreau8a4dca02022-01-13 16:00:12 +01005345 }
5346
Willy Tarreau115e83b2018-12-01 19:17:53 +01005347 if (es_now) {
5348 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005349 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 +01005350 if (h2s->st == H2_SS_OPEN)
5351 h2s->st = H2_SS_HLOC;
5352 else
5353 h2s_close(h2s);
5354 }
5355
5356 /* OK we could properly deliver the response */
Willy Tarreau115e83b2018-12-01 19:17:53 +01005357 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005358 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005359 return ret;
5360 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005361 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5362 goto retry;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005363 h2c->flags |= H2_CF_MUX_MFULL;
5364 h2s->flags |= H2_SF_BLK_MROOM;
5365 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005366 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 +01005367 goto end;
5368 fail:
5369 /* unparsable HTX messages, too large ones to be produced in the local
5370 * list etc go here (unrecoverable errors).
5371 */
5372 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5373 ret = 0;
5374 goto end;
5375}
5376
Willy Tarreau80739692018-10-05 11:35:57 +02005377/* Try to send a HEADERS frame matching HTX request present in HTX message
5378 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
5379 * must check the stream's status to detect any error which might have happened
5380 * subsequently to a successful send. The htx blocks are automatically removed
5381 * from the message. The htx message is assumed to be valid since produced from
5382 * the internal code, hence it contains a start line, an optional series of
5383 * header blocks and an end of header, otherwise an invalid frame could be
5384 * emitted and the resulting htx message could be left in an inconsistent state.
5385 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005386static size_t h2s_bck_make_req_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau80739692018-10-05 11:35:57 +02005387{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005388 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau80739692018-10-05 11:35:57 +02005389 struct h2c *h2c = h2s->h2c;
5390 struct htx_blk *blk;
Willy Tarreau80739692018-10-05 11:35:57 +02005391 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005392 struct buffer *mbuf;
Willy Tarreau80739692018-10-05 11:35:57 +02005393 struct htx_sl *sl;
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005394 struct ist meth, uri, auth, host = IST_NULL;
Willy Tarreau80739692018-10-05 11:35:57 +02005395 enum htx_blk_type type;
5396 int es_now = 0;
5397 int ret = 0;
5398 int hdr;
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005399 int extended_connect = 0;
Willy Tarreau80739692018-10-05 11:35:57 +02005400
Willy Tarreau7838a792019-08-12 18:42:03 +02005401 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5402
Willy Tarreau80739692018-10-05 11:35:57 +02005403 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005404 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02005405 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005406 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02005407 return 0;
5408 }
5409
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005410 /* get the start line (we do have one) and the rest of the headers,
5411 * that we dump starting at header 0 */
5412 sl = NULL;
Willy Tarreau80739692018-10-05 11:35:57 +02005413 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005414 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005415 type = htx_get_blk_type(blk);
5416
5417 if (type == HTX_BLK_UNUSED)
5418 continue;
5419
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005420 if (type == HTX_BLK_EOH)
Willy Tarreau80739692018-10-05 11:35:57 +02005421 break;
5422
Christopher Fauletc29b4bf2021-01-29 11:49:16 +01005423 if (type == HTX_BLK_HDR) {
Christopher Faulet56498132021-01-29 11:39:43 +01005424 BUG_ON(!sl); /* The start-line mut be defined before any headers */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005425 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5426 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5427 goto fail;
5428 }
Willy Tarreau80739692018-10-05 11:35:57 +02005429
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005430 list[hdr].n = htx_get_blk_name(htx, blk);
5431 list[hdr].v = htx_get_blk_value(htx, blk);
Christopher Faulet67d58092019-10-02 10:51:38 +02005432
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005433 /* Skip header if same name is used to add the server name */
5434 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name &&
5435 isteq(list[hdr].n, ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len)))
5436 continue;
Christopher Faulet67d58092019-10-02 10:51:38 +02005437
Ilya Shipitsinacf84592021-02-06 22:29:08 +05005438 /* Convert connection: upgrade to Extended connect from rfc 8441 */
Christopher Faulet673504a2021-09-09 09:52:51 +02005439 if ((sl->flags & HTX_SL_F_CONN_UPG) && isteqi(list[hdr].n, ist("connection"))) {
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005440 /* rfc 7230 #6.1 Connection = list of tokens */
5441 struct ist connection_ist = list[hdr].v;
5442 do {
5443 if (isteqi(iststop(connection_ist, ','),
5444 ist("upgrade"))) {
Amaury Denoyelle68993a12021-10-18 09:43:29 +02005445 if (!(h2c->flags & H2_CF_RCVD_RFC8441)) {
5446 TRACE_STATE("reject upgrade because of no RFC8441 support", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5447 goto fail;
5448 }
5449
Amaury Denoyellea1fa1542021-10-18 10:05:16 +02005450 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 +01005451 h2s->flags |= (H2_SF_BODY_TUNNEL|H2_SF_EXT_CONNECT_SENT);
5452 sl->info.req.meth = HTTP_METH_CONNECT;
5453 meth = ist("CONNECT");
5454
5455 extended_connect = 1;
5456 break;
5457 }
5458
5459 connection_ist = istadv(istfind(connection_ist, ','), 1);
5460 } while (istlen(connection_ist));
5461 }
5462
Christopher Faulet673504a2021-09-09 09:52:51 +02005463 if ((sl->flags & HTX_SL_F_CONN_UPG) && isteq(list[hdr].n, ist("upgrade"))) {
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005464 /* rfc 7230 #6.7 Upgrade = list of protocols
5465 * rfc 8441 #4 Extended connect = :protocol is single-valued
5466 *
5467 * only first HTTP/1 protocol is preserved
5468 */
5469 const struct ist protocol = iststop(list[hdr].v, ',');
5470 /* upgrade_protocol field is 16 bytes long in h2s */
5471 istpad(h2s->upgrade_protocol, isttrim(protocol, 15));
5472 }
5473
5474 if (isteq(list[hdr].n, ist("host")))
5475 host = list[hdr].v;
5476
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005477 hdr++;
5478 }
Christopher Fauletc29b4bf2021-01-29 11:49:16 +01005479 else if (type == HTX_BLK_REQ_SL) {
5480 BUG_ON(sl); /* Only one start-line expected */
5481 sl = htx_get_blk_ptr(htx, blk);
5482 meth = htx_sl_req_meth(sl);
5483 uri = htx_sl_req_uri(sl);
5484 if (sl->info.req.meth == HTTP_METH_HEAD)
5485 h2s->flags |= H2_SF_BODYLESS_RESP;
5486 if (unlikely(uri.len == 0)) {
5487 TRACE_ERROR("no URI in HTX request", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5488 goto fail;
5489 }
5490 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005491 else {
5492 TRACE_ERROR("will not encode unexpected htx block", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5493 goto fail;
5494 }
Willy Tarreau80739692018-10-05 11:35:57 +02005495 }
5496
Christopher Faulet56498132021-01-29 11:39:43 +01005497 /* The start-line me be defined */
5498 BUG_ON(!sl);
5499
Christopher Faulet72ba6cd2019-09-24 16:20:05 +02005500 /* Now add the server name to a header (if requested) */
5501 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name) {
5502 struct server *srv = objt_server(h2c->conn->target);
5503
5504 if (srv) {
5505 list[hdr].n = ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len);
5506 list[hdr].v = ist(srv->id);
5507 hdr++;
5508 }
5509 }
5510
Willy Tarreau80739692018-10-05 11:35:57 +02005511 /* marker for end of headers */
5512 list[hdr].n = ist("");
5513
Willy Tarreau9c218e72019-05-26 10:08:28 +02005514 mbuf = br_tail(h2c->mbuf);
5515 retry:
5516 if (!h2_get_buf(h2c, mbuf)) {
5517 h2c->flags |= H2_CF_MUX_MALLOC;
5518 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005519 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 +02005520 return 0;
5521 }
5522
Willy Tarreau80739692018-10-05 11:35:57 +02005523 chunk_reset(&outbuf);
5524
5525 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005526 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5527 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005528 break;
5529 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005530 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau80739692018-10-05 11:35:57 +02005531 }
5532
5533 if (outbuf.size < 9)
5534 goto full;
5535
5536 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5537 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5538 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5539 outbuf.data = 9;
5540
5541 /* encode the method, which necessarily is the first one */
Willy Tarreaubdabc3a2018-12-10 18:25:11 +01005542 if (!hpack_encode_method(&outbuf, sl->info.req.meth, meth)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005543 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005544 goto realign_again;
5545 goto full;
5546 }
5547
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005548 auth = ist(NULL);
5549
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005550 /* RFC7540 #8.3: the CONNECT method must have :
5551 * - :authority set to the URI part (host:port)
5552 * - :method set to CONNECT
5553 * - :scheme and :path omitted
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005554 *
5555 * Note that this is not applicable in case of the Extended CONNECT
5556 * protocol from rfc 8441.
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005557 */
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005558 if (unlikely(sl->info.req.meth == HTTP_METH_CONNECT) && !extended_connect) {
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005559 auth = uri;
5560
5561 if (!hpack_encode_header(&outbuf, ist(":authority"), auth)) {
5562 /* output full */
5563 if (b_space_wraps(mbuf))
5564 goto realign_again;
5565 goto full;
5566 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005567 h2s->flags |= H2_SF_BODY_TUNNEL;
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005568 } else {
5569 /* other methods need a :scheme. If an authority is known from
5570 * the request line, it must be sent, otherwise only host is
5571 * sent. Host is never sent as the authority.
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005572 *
5573 * This code is also applicable for Extended CONNECT protocol
5574 * from rfc 8441.
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005575 */
5576 struct ist scheme = { };
Christopher Faulet3b44c542019-06-14 10:46:51 +02005577
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005578 if (uri.ptr[0] != '/' && uri.ptr[0] != '*') {
5579 /* the URI seems to start with a scheme */
5580 int len = 1;
5581
5582 while (len < uri.len && uri.ptr[len] != ':')
5583 len++;
5584
5585 if (len + 2 < uri.len && uri.ptr[len + 1] == '/' && uri.ptr[len + 2] == '/') {
5586 /* make the uri start at the authority now */
Tim Duesterhus9f75ed12021-03-02 18:57:26 +01005587 scheme = ist2(uri.ptr, len);
Tim Duesterhus154374c2021-03-02 18:57:27 +01005588 uri = istadv(uri, len + 3);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005589
5590 /* find the auth part of the URI */
Tim Duesterhus92c696e2021-02-28 16:11:36 +01005591 auth = ist2(uri.ptr, 0);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005592 while (auth.len < uri.len && auth.ptr[auth.len] != '/')
5593 auth.len++;
5594
Tim Duesterhus154374c2021-03-02 18:57:27 +01005595 uri = istadv(uri, auth.len);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005596 }
5597 }
5598
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005599 /* For Extended CONNECT, the :authority must be present.
5600 * Use host value for it.
5601 */
5602 if (unlikely(extended_connect) && isttest(host))
5603 auth = host;
5604
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005605 if (!scheme.len) {
5606 /* no explicit scheme, we're using an origin-form URI,
5607 * probably from an H1 request transcoded to H2 via an
5608 * external layer, then received as H2 without authority.
5609 * So we have to look up the scheme from the HTX flags.
5610 * In such a case only http and https are possible, and
5611 * https is the default (sent by browsers).
5612 */
5613 if ((sl->flags & (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP)) == (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP))
5614 scheme = ist("http");
5615 else
5616 scheme = ist("https");
5617 }
Christopher Faulet3b44c542019-06-14 10:46:51 +02005618
5619 if (!hpack_encode_scheme(&outbuf, scheme)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005620 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005621 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005622 goto realign_again;
5623 goto full;
5624 }
Willy Tarreau80739692018-10-05 11:35:57 +02005625
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005626 if (auth.len && !hpack_encode_header(&outbuf, ist(":authority"), auth)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005627 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005628 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005629 goto realign_again;
5630 goto full;
5631 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005632
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005633 /* encode the path. RFC7540#8.1.2.3: if path is empty it must
5634 * be sent as '/' or '*'.
5635 */
5636 if (unlikely(!uri.len)) {
5637 if (sl->info.req.meth == HTTP_METH_OPTIONS)
5638 uri = ist("*");
5639 else
5640 uri = ist("/");
Willy Tarreau053c1572019-02-01 16:13:59 +01005641 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005642
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005643 if (!hpack_encode_path(&outbuf, uri)) {
5644 /* output full */
5645 if (b_space_wraps(mbuf))
5646 goto realign_again;
5647 goto full;
5648 }
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005649
5650 /* encode the pseudo-header protocol from rfc8441 if using
5651 * Extended CONNECT method.
5652 */
5653 if (unlikely(extended_connect)) {
5654 const struct ist protocol = ist(h2s->upgrade_protocol);
5655 if (isttest(protocol)) {
5656 if (!hpack_encode_header(&outbuf,
5657 ist(":protocol"),
5658 protocol)) {
5659 /* output full */
5660 if (b_space_wraps(mbuf))
5661 goto realign_again;
5662 goto full;
5663 }
5664 }
5665 }
Willy Tarreau80739692018-10-05 11:35:57 +02005666 }
5667
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005668 /* encode all headers, stop at empty name. Host is only sent if we
5669 * do not provide an authority.
5670 */
Willy Tarreau80739692018-10-05 11:35:57 +02005671 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005672 struct ist n = list[hdr].n;
5673 struct ist v = list[hdr].v;
5674
Willy Tarreau80739692018-10-05 11:35:57 +02005675 /* these ones do not exist in H2 and must be dropped. */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005676 if (isteq(n, ist("connection")) ||
5677 (auth.len && isteq(n, ist("host"))) ||
5678 isteq(n, ist("proxy-connection")) ||
5679 isteq(n, ist("keep-alive")) ||
5680 isteq(n, ist("upgrade")) ||
5681 isteq(n, ist("transfer-encoding")))
Willy Tarreau80739692018-10-05 11:35:57 +02005682 continue;
5683
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005684 if (isteq(n, ist("te"))) {
5685 /* "te" may only be sent with "trailers" if this value
5686 * is present, otherwise it must be deleted.
5687 */
5688 v = istist(v, ist("trailers"));
Tim Duesterhus7b5777d2021-03-02 18:57:28 +01005689 if (!isttest(v) || (v.len > 8 && v.ptr[8] != ','))
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005690 continue;
5691 v = ist("trailers");
5692 }
5693
Christopher Faulet86d144c2019-08-14 16:32:25 +02005694 /* Skip all pseudo-headers */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005695 if (*(n.ptr) == ':')
Christopher Faulet86d144c2019-08-14 16:32:25 +02005696 continue;
5697
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005698 if (isteq(n, ist("")))
Willy Tarreau80739692018-10-05 11:35:57 +02005699 break; // end
5700
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005701 if (!hpack_encode_header(&outbuf, n, v)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005702 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005703 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005704 goto realign_again;
5705 goto full;
5706 }
5707 }
5708
Willy Tarreaucb985a42019-10-07 16:56:34 +02005709 /* update the frame's size */
5710 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5711
5712 if (outbuf.data > h2c->mfs + 9) {
5713 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5714 /* output full */
5715 if (b_space_wraps(mbuf))
5716 goto realign_again;
5717 goto full;
5718 }
5719 }
5720
Willy Tarreau38b5bec2021-06-17 08:40:04 +02005721 TRACE_USER("sent H2 request ", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
5722
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005723 /* remove all header blocks including the EOH and compute the
5724 * corresponding size.
Willy Tarreau80739692018-10-05 11:35:57 +02005725 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005726 ret = 0;
5727 blk = htx_get_head_blk(htx);
5728 while (blk) {
5729 type = htx_get_blk_type(blk);
5730 ret += htx_get_blksz(blk);
5731 blk = htx_remove_blk(htx, blk);
5732 /* The removed block is the EOH */
5733 if (type == HTX_BLK_EOH)
5734 break;
Christopher Fauletd0db4232021-01-22 11:46:30 +01005735 }
Willy Tarreau80739692018-10-05 11:35:57 +02005736
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005737 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW) {
5738 /* Request already closed: add END_STREAM */
Willy Tarreau80739692018-10-05 11:35:57 +02005739 es_now = 1;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005740 }
5741 if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx)) {
5742 /* EOM+empty: we may need to add END_STREAM (except for CONNECT
5743 * request)
5744 */
5745 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5746 es_now = 1;
5747 }
Willy Tarreau80739692018-10-05 11:35:57 +02005748
Willy Tarreau80739692018-10-05 11:35:57 +02005749 if (es_now)
5750 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5751
5752 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005753 b_add(mbuf, outbuf.data);
Willy Tarreau80739692018-10-05 11:35:57 +02005754 h2s->flags |= H2_SF_HEADERS_SENT;
5755 h2s->st = H2_SS_OPEN;
5756
Willy Tarreau80739692018-10-05 11:35:57 +02005757 if (es_now) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005758 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 +02005759 // trim any possibly pending data (eg: inconsistent content-length)
5760 h2s->flags |= H2_SF_ES_SENT;
5761 h2s->st = H2_SS_HLOC;
5762 }
5763
Willy Tarreau80739692018-10-05 11:35:57 +02005764 end:
5765 return ret;
5766 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005767 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5768 goto retry;
Willy Tarreau80739692018-10-05 11:35:57 +02005769 h2c->flags |= H2_CF_MUX_MFULL;
5770 h2s->flags |= H2_SF_BLK_MROOM;
5771 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005772 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 +02005773 goto end;
5774 fail:
5775 /* unparsable HTX messages, too large ones to be produced in the local
5776 * list etc go here (unrecoverable errors).
5777 */
5778 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5779 ret = 0;
5780 goto end;
5781}
5782
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005783/* Try to send a DATA frame matching HTTP response present in HTX structure
Willy Tarreau98de12a2018-12-12 07:03:00 +01005784 * present in <buf>, for stream <h2s>. Returns the number of bytes sent. The
5785 * caller must check the stream's status to detect any error which might have
5786 * happened subsequently to a successful send. Returns the number of data bytes
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005787 * consumed, or zero if nothing done.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005788 */
Christopher Faulet142854b2020-12-02 15:12:40 +01005789static size_t h2s_make_data(struct h2s *h2s, struct buffer *buf, size_t count)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005790{
5791 struct h2c *h2c = h2s->h2c;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005792 struct htx *htx;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005793 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005794 struct buffer *mbuf;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005795 size_t total = 0;
5796 int es_now = 0;
5797 int bsize; /* htx block size */
5798 int fsize; /* h2 frame size */
5799 struct htx_blk *blk;
5800 enum htx_blk_type type;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005801 int trunc_out; /* non-zero if truncated on out buf */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005802
Willy Tarreau7838a792019-08-12 18:42:03 +02005803 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5804
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005805 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005806 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005807 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005808 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005809 goto end;
5810 }
5811
Willy Tarreau98de12a2018-12-12 07:03:00 +01005812 htx = htx_from_buf(buf);
5813
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005814 /* We only come here with HTX_BLK_DATA blocks */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005815
5816 new_frame:
Willy Tarreauee573762018-12-04 15:25:57 +01005817 if (!count || htx_is_empty(htx))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005818 goto end;
5819
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005820 if ((h2c->flags & H2_CF_IS_BACK) &&
Christopher Fauletf95f8762021-01-22 11:59:07 +01005821 (h2s->flags & (H2_SF_HEADERS_RCVD|H2_SF_BODY_TUNNEL)) == H2_SF_BODY_TUNNEL) {
5822 /* The response HEADERS frame not received yet. Thus the tunnel
5823 * is not fully established yet. In this situation, we block
5824 * data sending.
5825 */
5826 h2s->flags |= H2_SF_BLK_MBUSY;
5827 TRACE_STATE("Request DATA frame blocked waiting for tunnel establishment", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5828 goto end;
5829 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01005830 else if ((h2c->flags & H2_CF_IS_BACK) && (h2s->flags & H2_SF_TUNNEL_ABRT)) {
5831 /* a tunnel attempt was aborted but the is pending raw data to xfer to the server.
5832 * Thus the stream is closed with the CANCEL error. The error will be reported to
5833 * the upper layer as aserver abort. But at this stage there is nothing more we can
5834 * do. We just wait for the end of the response to be sure to not truncate it.
5835 */
5836 if (!(h2s->flags & H2_SF_ES_RCVD)) {
5837 TRACE_STATE("Request DATA frame blocked waiting end of aborted tunnel", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5838 h2s->flags |= H2_SF_BLK_MBUSY;
5839 }
5840 else {
5841 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
5842 h2s_error(h2s, H2_ERR_CANCEL);
5843 }
5844 goto end;
5845 }
Willy Tarreau98de12a2018-12-12 07:03:00 +01005846
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005847 blk = htx_get_head_blk(htx);
5848 type = htx_get_blk_type(blk);
5849 bsize = htx_get_blksz(blk);
5850 fsize = bsize;
5851 trunc_out = 0;
5852 if (type != HTX_BLK_DATA)
5853 goto end;
5854
Willy Tarreau9c218e72019-05-26 10:08:28 +02005855 mbuf = br_tail(h2c->mbuf);
5856 retry:
5857 if (!h2_get_buf(h2c, mbuf)) {
5858 h2c->flags |= H2_CF_MUX_MALLOC;
5859 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005860 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 +02005861 goto end;
5862 }
5863
Willy Tarreau98de12a2018-12-12 07:03:00 +01005864 /* Perform some optimizations to reduce the number of buffer copies.
5865 * First, if the mux's buffer is empty and the htx area contains
5866 * exactly one data block of the same size as the requested count, and
5867 * this count fits within the frame size, the stream's window size, and
5868 * the connection's window size, then it's possible to simply swap the
5869 * caller's buffer with the mux's output buffer and adjust offsets and
5870 * length to match the entire DATA HTX block in the middle. In this
5871 * case we perform a true zero-copy operation from end-to-end. This is
5872 * the situation that happens all the time with large files. Second, if
5873 * this is not possible, but the mux's output buffer is empty, we still
5874 * have an opportunity to avoid the copy to the intermediary buffer, by
5875 * making the intermediary buffer's area point to the output buffer's
5876 * area. In this case we want to skip the HTX header to make sure that
5877 * copies remain aligned and that this operation remains possible all
5878 * the time. This goes for headers, data blocks and any data extracted
5879 * from the HTX blocks.
5880 */
5881 if (unlikely(fsize == count &&
Christopher Faulet192c6a22019-06-11 16:32:24 +02005882 htx_nbblks(htx) == 1 && type == HTX_BLK_DATA &&
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005883 fsize <= h2s_mws(h2s) && fsize <= h2c->mws && fsize <= h2c->mfs)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005884 void *old_area = mbuf->area;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005885
Willy Tarreaubcc45952019-05-26 10:05:50 +02005886 if (b_data(mbuf)) {
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005887 /* Too bad there are data left there. We're willing to memcpy/memmove
5888 * up to 1/4 of the buffer, which means that it's OK to copy a large
5889 * frame into a buffer containing few data if it needs to be realigned,
5890 * and that it's also OK to copy few data without realigning. Otherwise
5891 * we'll pretend the mbuf is full and wait for it to become empty.
Willy Tarreau98de12a2018-12-12 07:03:00 +01005892 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005893 if (fsize + 9 <= b_room(mbuf) &&
5894 (b_data(mbuf) <= b_size(mbuf) / 4 ||
Willy Tarreau7838a792019-08-12 18:42:03 +02005895 (fsize <= b_size(mbuf) / 4 && fsize + 9 <= b_contig_space(mbuf)))) {
5896 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 +01005897 goto copy;
Willy Tarreau7838a792019-08-12 18:42:03 +02005898 }
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005899
Willy Tarreau9c218e72019-05-26 10:08:28 +02005900 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5901 goto retry;
5902
Willy Tarreau98de12a2018-12-12 07:03:00 +01005903 h2c->flags |= H2_CF_MUX_MFULL;
5904 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005905 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 +01005906 goto end;
5907 }
5908
Christopher Faulet925abdf2021-04-27 22:51:07 +02005909 if (htx->flags & HTX_FL_EOM) {
5910 /* EOM+empty: we may need to add END_STREAM (except for tunneled
5911 * message)
5912 */
5913 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5914 es_now = 1;
5915 }
Willy Tarreau98de12a2018-12-12 07:03:00 +01005916 /* map an H2 frame to the HTX block so that we can put the
5917 * frame header there.
5918 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005919 *mbuf = b_make(buf->area, buf->size, sizeof(struct htx) + blk->addr - 9, fsize + 9);
5920 outbuf.area = b_head(mbuf);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005921
5922 /* prepend an H2 DATA frame header just before the DATA block */
5923 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5924 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
Christopher Faulet925abdf2021-04-27 22:51:07 +02005925 if (es_now)
5926 outbuf.area[4] |= H2_F_DATA_END_STREAM;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005927 h2_set_frame_size(outbuf.area, fsize);
5928
5929 /* update windows */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005930 h2s->sws -= fsize;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005931 h2c->mws -= fsize;
5932
5933 /* and exchange with our old area */
5934 buf->area = old_area;
5935 buf->data = buf->head = 0;
5936 total += fsize;
Christopher Faulet925abdf2021-04-27 22:51:07 +02005937 fsize = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005938
5939 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 +02005940 goto out;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005941 }
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005942
Willy Tarreau98de12a2018-12-12 07:03:00 +01005943 copy:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005944 /* for DATA and EOM we'll have to emit a frame, even if empty */
5945
5946 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005947 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5948 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005949 break;
5950 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005951 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005952 }
5953
5954 if (outbuf.size < 9) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02005955 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5956 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005957 h2c->flags |= H2_CF_MUX_MFULL;
5958 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005959 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005960 goto end;
5961 }
5962
5963 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
5964 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5965 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5966 outbuf.data = 9;
5967
5968 /* we have in <fsize> the exact number of bytes we need to copy from
5969 * the HTX buffer. We need to check this against the connection's and
5970 * the stream's send windows, and to ensure that this fits in the max
5971 * frame size and in the buffer's available space minus 9 bytes (for
5972 * the frame header). The connection's flow control is applied last so
5973 * that we can use a separate list of streams which are immediately
5974 * unblocked on window opening. Note: we don't implement padding.
5975 */
5976
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005977 if (!fsize)
5978 goto send_empty;
5979
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005980 if (h2s_mws(h2s) <= 0) {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005981 h2s->flags |= H2_SF_BLK_SFCTL;
Willy Tarreau2b718102021-04-21 07:32:39 +02005982 if (LIST_INLIST(&h2s->list))
Olivier Houchardbfe2a832019-05-10 14:02:21 +02005983 LIST_DEL_INIT(&h2s->list);
Willy Tarreau2b718102021-04-21 07:32:39 +02005984 LIST_APPEND(&h2c->blocked_list, &h2s->list);
Willy Tarreau7838a792019-08-12 18:42:03 +02005985 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 +01005986 goto end;
5987 }
5988
Willy Tarreauee573762018-12-04 15:25:57 +01005989 if (fsize > count)
5990 fsize = count;
5991
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005992 if (fsize > h2s_mws(h2s))
5993 fsize = h2s_mws(h2s); // >0
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005994
5995 if (h2c->mfs && fsize > h2c->mfs)
5996 fsize = h2c->mfs; // >0
5997
5998 if (fsize + 9 > outbuf.size) {
Willy Tarreau455d5682019-05-24 19:42:18 +02005999 /* It doesn't fit at once. If it at least fits once split and
6000 * the amount of data to move is low, let's defragment the
6001 * buffer now.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006002 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02006003 if (b_space_wraps(mbuf) &&
6004 (fsize + 9 <= b_room(mbuf)) &&
6005 b_data(mbuf) <= MAX_DATA_REALIGN)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006006 goto realign_again;
6007 fsize = outbuf.size - 9;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01006008 trunc_out = 1;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006009
6010 if (fsize <= 0) {
6011 /* no need to send an empty frame here */
Willy Tarreau9c218e72019-05-26 10:08:28 +02006012 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
6013 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006014 h2c->flags |= H2_CF_MUX_MFULL;
6015 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02006016 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006017 goto end;
6018 }
6019 }
6020
6021 if (h2c->mws <= 0) {
6022 h2s->flags |= H2_SF_BLK_MFCTL;
Willy Tarreau7838a792019-08-12 18:42:03 +02006023 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 +01006024 goto end;
6025 }
6026
6027 if (fsize > h2c->mws)
6028 fsize = h2c->mws;
6029
6030 /* now let's copy this this into the output buffer */
6031 memcpy(outbuf.area + 9, htx_get_blk_ptr(htx, blk), fsize);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02006032 h2s->sws -= fsize;
Willy Tarreau0f799ca2018-12-04 15:20:11 +01006033 h2c->mws -= fsize;
Willy Tarreauee573762018-12-04 15:25:57 +01006034 count -= fsize;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006035
6036 send_empty:
6037 /* update the frame's size */
6038 h2_set_frame_size(outbuf.area, fsize);
6039
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006040 /* consume incoming HTX block */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006041 total += fsize;
6042 if (fsize == bsize) {
6043 htx_remove_blk(htx, blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006044 if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx)) {
6045 /* EOM+empty: we may need to add END_STREAM (except for tunneled
6046 * message)
6047 */
6048 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
6049 es_now = 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02006050 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006051 }
6052 else {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006053 /* we've truncated this block */
6054 htx_cut_data_blk(htx, blk, fsize);
6055 }
6056
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006057 if (es_now)
6058 outbuf.area[4] |= H2_F_DATA_END_STREAM;
6059
6060 /* commit the H2 response */
6061 b_add(mbuf, fsize + 9);
6062
Christopher Faulet925abdf2021-04-27 22:51:07 +02006063 out:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006064 if (es_now) {
6065 if (h2s->st == H2_SS_OPEN)
6066 h2s->st = H2_SS_HLOC;
6067 else
6068 h2s_close(h2s);
6069
6070 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02006071 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 +01006072 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006073 else if (fsize) {
6074 if (fsize == bsize) {
6075 TRACE_DEVEL("more data may be available, trying to send another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6076 goto new_frame;
6077 }
6078 else if (trunc_out) {
6079 /* we've truncated this block */
6080 goto new_frame;
6081 }
6082 }
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006083
6084 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02006085 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006086 return total;
6087}
6088
Christopher Faulet991febd2020-12-02 15:17:31 +01006089/* Skip the message payload (DATA blocks) and emit an empty DATA frame with the
6090 * ES flag set for stream <h2s>. This function is called for response known to
6091 * have no payload. Only DATA blocks are skipped. This means the trailers are
Ilya Shipitsinacf84592021-02-06 22:29:08 +05006092 * still emitted. The caller must check the stream's status to detect any error
Christopher Faulet991febd2020-12-02 15:17:31 +01006093 * which might have happened subsequently to a successful send. Returns the
6094 * number of data bytes consumed, or zero if nothing done.
6095 */
6096static size_t h2s_skip_data(struct h2s *h2s, struct buffer *buf, size_t count)
6097{
6098 struct h2c *h2c = h2s->h2c;
6099 struct htx *htx;
6100 int bsize; /* htx block size */
6101 int fsize; /* h2 frame size */
6102 struct htx_blk *blk;
6103 enum htx_blk_type type;
6104 size_t total = 0;
6105
6106 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6107
6108 if (h2c_mux_busy(h2c, h2s)) {
6109 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6110 h2s->flags |= H2_SF_BLK_MBUSY;
6111 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6112 goto end;
6113 }
6114
6115 htx = htx_from_buf(buf);
6116
6117 next_data:
6118 if (!count || htx_is_empty(htx))
6119 goto end;
6120 blk = htx_get_head_blk(htx);
6121 type = htx_get_blk_type(blk);
6122 bsize = htx_get_blksz(blk);
6123 fsize = bsize;
6124 if (type != HTX_BLK_DATA)
6125 goto end;
6126
6127 if (fsize > count)
6128 fsize = count;
6129
6130 if (fsize != bsize)
6131 goto skip_data;
6132
6133 if (!(htx->flags & HTX_FL_EOM) || !htx_is_unique_blk(htx, blk))
6134 goto skip_data;
6135
6136 /* Here, it is the last block and it is also the end of the message. So
6137 * we can emit an empty DATA frame with the ES flag set
6138 */
6139 if (h2_send_empty_data_es(h2s) <= 0)
6140 goto end;
6141
6142 if (h2s->st == H2_SS_OPEN)
6143 h2s->st = H2_SS_HLOC;
6144 else
6145 h2s_close(h2s);
6146
6147 skip_data:
6148 /* consume incoming HTX block */
6149 total += fsize;
6150 if (fsize == bsize) {
6151 TRACE_DEVEL("more data may be available, trying to skip another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6152 htx_remove_blk(htx, blk);
6153 goto next_data;
6154 }
6155 else {
6156 /* we've truncated this block */
6157 htx_cut_data_blk(htx, blk, fsize);
6158 }
6159
6160 end:
6161 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6162 return total;
6163}
6164
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006165/* Try to send a HEADERS frame matching HTX_BLK_TLR series of blocks present in
6166 * HTX message <htx> for the H2 stream <h2s>. Returns the number of bytes
6167 * processed. The caller must check the stream's status to detect any error
6168 * which might have happened subsequently to a successful send. The htx blocks
6169 * are automatically removed from the message. The htx message is assumed to be
6170 * valid since produced from the internal code. Processing stops when meeting
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006171 * the EOT, which *is* removed. All trailers are processed at once and sent as a
6172 * single frame. The ES flag is always set.
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006173 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006174static size_t h2s_make_trailers(struct h2s *h2s, struct htx *htx)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006175{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02006176 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006177 struct h2c *h2c = h2s->h2c;
6178 struct htx_blk *blk;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006179 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02006180 struct buffer *mbuf;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006181 enum htx_blk_type type;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006182 int ret = 0;
6183 int hdr;
6184 int idx;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006185
Willy Tarreau7838a792019-08-12 18:42:03 +02006186 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
6187
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006188 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006189 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006190 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02006191 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006192 goto end;
6193 }
6194
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006195 /* get trailers. */
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006196 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006197 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006198 type = htx_get_blk_type(blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006199
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006200 if (type == HTX_BLK_UNUSED)
6201 continue;
6202
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006203 if (type == HTX_BLK_EOT)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006204 break;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006205 if (type == HTX_BLK_TLR) {
6206 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
6207 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
6208 goto fail;
6209 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006210
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006211 list[hdr].n = htx_get_blk_name(htx, blk);
6212 list[hdr].v = htx_get_blk_value(htx, blk);
6213 hdr++;
6214 }
6215 else {
6216 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 +01006217 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02006218 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006219 }
6220
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006221 /* marker for end of trailers */
6222 list[hdr].n = ist("");
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006223
Willy Tarreau9c218e72019-05-26 10:08:28 +02006224 mbuf = br_tail(h2c->mbuf);
6225 retry:
6226 if (!h2_get_buf(h2c, mbuf)) {
6227 h2c->flags |= H2_CF_MUX_MALLOC;
6228 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02006229 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 +02006230 goto end;
6231 }
6232
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006233 chunk_reset(&outbuf);
6234
6235 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02006236 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
6237 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006238 break;
6239 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02006240 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006241 }
6242
6243 if (outbuf.size < 9)
6244 goto full;
6245
6246 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4,ES=1 */
6247 memcpy(outbuf.area, "\x00\x00\x00\x01\x05", 5);
6248 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
6249 outbuf.data = 9;
6250
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006251 /* encode all headers */
6252 for (idx = 0; idx < hdr; idx++) {
6253 /* these ones do not exist in H2 or must not appear in
6254 * trailers and must be dropped.
6255 */
6256 if (isteq(list[idx].n, ist("host")) ||
6257 isteq(list[idx].n, ist("content-length")) ||
6258 isteq(list[idx].n, ist("connection")) ||
6259 isteq(list[idx].n, ist("proxy-connection")) ||
6260 isteq(list[idx].n, ist("keep-alive")) ||
6261 isteq(list[idx].n, ist("upgrade")) ||
6262 isteq(list[idx].n, ist("te")) ||
6263 isteq(list[idx].n, ist("transfer-encoding")))
6264 continue;
6265
Christopher Faulet86d144c2019-08-14 16:32:25 +02006266 /* Skip all pseudo-headers */
6267 if (*(list[idx].n.ptr) == ':')
6268 continue;
6269
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006270 if (!hpack_encode_header(&outbuf, list[idx].n, list[idx].v)) {
6271 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02006272 if (b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006273 goto realign_again;
6274 goto full;
6275 }
6276 }
6277
Willy Tarreau5121e5d2019-05-06 15:13:41 +02006278 if (outbuf.data == 9) {
6279 /* here we have a problem, we have nothing to emit (either we
6280 * received an empty trailers block followed or we removed its
6281 * contents above). Because of this we can't send a HEADERS
6282 * frame, so we have to cheat and instead send an empty DATA
6283 * frame conveying the ES flag.
Willy Tarreau67b8cae2019-02-21 18:16:35 +01006284 */
6285 outbuf.area[3] = H2_FT_DATA;
6286 outbuf.area[4] = H2_F_DATA_END_STREAM;
6287 }
6288
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006289 /* update the frame's size */
6290 h2_set_frame_size(outbuf.area, outbuf.data - 9);
6291
Willy Tarreau572d9f52019-10-11 16:58:37 +02006292 if (outbuf.data > h2c->mfs + 9) {
6293 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
6294 /* output full */
6295 if (b_space_wraps(mbuf))
6296 goto realign_again;
6297 goto full;
6298 }
6299 }
6300
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006301 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02006302 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 +02006303 b_add(mbuf, outbuf.data);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006304 h2s->flags |= H2_SF_ES_SENT;
6305
6306 if (h2s->st == H2_SS_OPEN)
6307 h2s->st = H2_SS_HLOC;
6308 else
6309 h2s_close(h2s);
6310
6311 /* OK we could properly deliver the response */
6312 done:
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02006313 /* remove all header blocks till the end and compute the corresponding size. */
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006314 ret = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006315 blk = htx_get_head_blk(htx);
6316 while (blk) {
6317 type = htx_get_blk_type(blk);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006318 ret += htx_get_blksz(blk);
6319 blk = htx_remove_blk(htx, blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006320 /* The removed block is the EOT */
6321 if (type == HTX_BLK_EOT)
6322 break;
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006323 }
6324
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006325 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02006326 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006327 return ret;
6328 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02006329 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
6330 goto retry;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006331 h2c->flags |= H2_CF_MUX_MFULL;
6332 h2s->flags |= H2_SF_BLK_MROOM;
6333 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006334 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 +01006335 goto end;
6336 fail:
6337 /* unparsable HTX messages, too large ones to be produced in the local
6338 * list etc go here (unrecoverable errors).
6339 */
6340 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
6341 ret = 0;
6342 goto end;
6343}
6344
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006345/* Called from the upper layer, to subscribe <es> to events <event_type>. The
6346 * event subscriber <es> is not allowed to change from a previous call as long
6347 * as at least one event is still subscribed. The <event_type> must only be a
6348 * combination of SUB_RETRY_RECV and SUB_RETRY_SEND. It always returns 0.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006349 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006350static int h2_subscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard6ff20392018-07-17 18:46:31 +02006351{
Olivier Houchard6ff20392018-07-17 18:46:31 +02006352 struct h2s *h2s = cs->ctx;
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02006353 struct h2c *h2c = h2s->h2c;
Olivier Houchard6ff20392018-07-17 18:46:31 +02006354
Willy Tarreau7838a792019-08-12 18:42:03 +02006355 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006356
6357 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006358 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006359
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006360 es->events |= event_type;
6361 h2s->subs = es;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006362
6363 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006364 TRACE_DEVEL("subscribe(recv)", H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006365
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006366 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006367 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2c->conn, h2s);
Olivier Houchardf8338152019-05-14 17:50:32 +02006368 if (!(h2s->flags & H2_SF_BLK_SFCTL) &&
Willy Tarreau2b718102021-04-21 07:32:39 +02006369 !LIST_INLIST(&h2s->list)) {
Olivier Houchardf8338152019-05-14 17:50:32 +02006370 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02006371 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Olivier Houchardf8338152019-05-14 17:50:32 +02006372 else
Willy Tarreau2b718102021-04-21 07:32:39 +02006373 LIST_APPEND(&h2c->send_list, &h2s->list);
Olivier Houcharde1c6dbc2018-08-01 17:06:43 +02006374 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02006375 }
Willy Tarreau7838a792019-08-12 18:42:03 +02006376 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006377 return 0;
Olivier Houchard6ff20392018-07-17 18:46:31 +02006378}
6379
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006380/* Called from the upper layer, to unsubscribe <es> from events <event_type>.
6381 * The <es> pointer is not allowed to differ from the one passed to the
6382 * subscribe() call. It always returns zero.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006383 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006384static int h2_unsubscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006385{
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006386 struct h2s *h2s = cs->ctx;
6387
Willy Tarreau7838a792019-08-12 18:42:03 +02006388 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006389
6390 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006391 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006392
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006393 es->events &= ~event_type;
6394 if (!es->events)
Willy Tarreauf96508a2020-01-10 11:12:48 +01006395 h2s->subs = NULL;
6396
6397 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006398 TRACE_DEVEL("unsubscribe(recv)", H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006399
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006400 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006401 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006402 h2s->flags &= ~H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006403 if (!(h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)))
6404 LIST_DEL_INIT(&h2s->list);
Olivier Houchardd846c262018-10-19 17:24:29 +02006405 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01006406
Willy Tarreau7838a792019-08-12 18:42:03 +02006407 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006408 return 0;
6409}
6410
6411
Christopher Faulet93a466b2021-09-21 15:50:55 +02006412/* Called from the upper layer, to receive data
6413 *
6414 * The caller is responsible for defragmenting <buf> if necessary. But <flags>
6415 * must be tested to know the calling context. If CO_RFL_BUF_FLUSH is set, it
6416 * means the caller wants to flush input data (from the mux buffer and the
6417 * channel buffer) to be able to use kernel splicing or any kind of mux-to-mux
6418 * xfer. If CO_RFL_KEEP_RECV is set, the mux must always subscribe for read
6419 * events before giving back. CO_RFL_BUF_WET is set if <buf> is congested with
6420 * data scheduled for leaving soon. CO_RFL_BUF_NOT_STUCK is set to instruct the
6421 * mux it may optimize the data copy to <buf> if necessary. Otherwise, it should
6422 * copy as much data as possible.
6423 */
Olivier Houchard511efea2018-08-16 15:30:32 +02006424static size_t h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
6425{
Olivier Houchard638b7992018-08-16 15:41:52 +02006426 struct h2s *h2s = cs->ctx;
Willy Tarreau082f5592018-11-25 08:03:32 +01006427 struct h2c *h2c = h2s->h2c;
Willy Tarreau86724e22018-12-01 23:19:43 +01006428 struct htx *h2s_htx = NULL;
6429 struct htx *buf_htx = NULL;
Olivier Houchard511efea2018-08-16 15:30:32 +02006430 size_t ret = 0;
6431
Willy Tarreau7838a792019-08-12 18:42:03 +02006432 TRACE_ENTER(H2_EV_STRM_RECV, h2c->conn, h2s);
6433
Olivier Houchard511efea2018-08-16 15:30:32 +02006434 /* transfer possibly pending data to the upper layer */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006435 h2s_htx = htx_from_buf(&h2s->rxbuf);
Christopher Faulet83f3d3d2022-02-21 15:12:54 +01006436 if (htx_is_empty(h2s_htx) && !(h2s_htx->flags & HTX_FL_PARSING_ERROR)) {
Christopher Faulet9b79a102019-07-15 11:22:56 +02006437 /* Here htx_to_buf() will set buffer data to 0 because
6438 * the HTX is empty.
6439 */
6440 htx_to_buf(h2s_htx, &h2s->rxbuf);
6441 goto end;
6442 }
Willy Tarreau7196dd62019-03-05 10:51:11 +01006443
Christopher Faulet9b79a102019-07-15 11:22:56 +02006444 ret = h2s_htx->data;
6445 buf_htx = htx_from_buf(buf);
Willy Tarreau7196dd62019-03-05 10:51:11 +01006446
Christopher Faulet9b79a102019-07-15 11:22:56 +02006447 /* <buf> is empty and the message is small enough, swap the
6448 * buffers. */
6449 if (htx_is_empty(buf_htx) && htx_used_space(h2s_htx) <= count) {
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01006450 htx_to_buf(buf_htx, buf);
6451 htx_to_buf(h2s_htx, &h2s->rxbuf);
Christopher Faulet9b79a102019-07-15 11:22:56 +02006452 b_xfer(buf, &h2s->rxbuf, b_data(&h2s->rxbuf));
6453 goto end;
Willy Tarreau86724e22018-12-01 23:19:43 +01006454 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02006455
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006456 htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_UNUSED);
Christopher Faulet9b79a102019-07-15 11:22:56 +02006457
6458 if (h2s_htx->flags & HTX_FL_PARSING_ERROR) {
6459 buf_htx->flags |= HTX_FL_PARSING_ERROR;
6460 if (htx_is_empty(buf_htx))
6461 cs->flags |= CS_FL_EOI;
Willy Tarreau86724e22018-12-01 23:19:43 +01006462 }
Christopher Faulet810df062020-07-22 16:20:34 +02006463 else if (htx_is_empty(h2s_htx))
Christopher Faulet42432f32020-11-20 17:43:16 +01006464 buf_htx->flags |= (h2s_htx->flags & HTX_FL_EOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02006465
Christopher Faulet9b79a102019-07-15 11:22:56 +02006466 buf_htx->extra = (h2s_htx->extra ? (h2s_htx->data + h2s_htx->extra) : 0);
6467 htx_to_buf(buf_htx, buf);
6468 htx_to_buf(h2s_htx, &h2s->rxbuf);
6469 ret -= h2s_htx->data;
6470
Christopher Faulet37070b22019-02-14 15:12:14 +01006471 end:
Olivier Houchard638b7992018-08-16 15:41:52 +02006472 if (b_data(&h2s->rxbuf))
Olivier Houchardd247be02018-12-06 16:22:29 +01006473 cs->flags |= (CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02006474 else {
Olivier Houchardd247be02018-12-06 16:22:29 +01006475 cs->flags &= ~(CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Christopher Fauletd0db4232021-01-22 11:46:30 +01006476 if (h2s->flags & H2_SF_ES_RCVD) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02006477 cs->flags |= CS_FL_EOI;
Christopher Fauletd0db4232021-01-22 11:46:30 +01006478 /* Add EOS flag for tunnel */
6479 if (h2s->flags & H2_SF_BODY_TUNNEL)
6480 cs->flags |= CS_FL_EOS;
6481 }
Christopher Fauletaade4ed2020-10-08 15:38:41 +02006482 if (h2c_read0_pending(h2c) || h2s->st == H2_SS_CLOSED)
Olivier Houchard511efea2018-08-16 15:30:32 +02006483 cs->flags |= CS_FL_EOS;
Olivier Houchard71748cb2018-12-17 14:16:46 +01006484 if (cs->flags & CS_FL_ERR_PENDING)
6485 cs->flags |= CS_FL_ERROR;
Olivier Houchard638b7992018-08-16 15:41:52 +02006486 if (b_size(&h2s->rxbuf)) {
6487 b_free(&h2s->rxbuf);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01006488 offer_buffers(NULL, 1);
Olivier Houchard638b7992018-08-16 15:41:52 +02006489 }
Olivier Houchard511efea2018-08-16 15:30:32 +02006490 }
6491
Willy Tarreau082f5592018-11-25 08:03:32 +01006492 if (ret && h2c->dsi == h2s->id) {
6493 /* demux is blocking on this stream's buffer */
6494 h2c->flags &= ~H2_CF_DEM_SFULL;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02006495 h2c_restart_reading(h2c, 1);
Willy Tarreau082f5592018-11-25 08:03:32 +01006496 }
Christopher Faulet37070b22019-02-14 15:12:14 +01006497
Willy Tarreau7838a792019-08-12 18:42:03 +02006498 TRACE_LEAVE(H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard511efea2018-08-16 15:30:32 +02006499 return ret;
6500}
6501
Olivier Houchardd846c262018-10-19 17:24:29 +02006502
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006503/* Called from the upper layer, to send data from buffer <buf> for no more than
6504 * <count> bytes. Returns the number of bytes effectively sent. Some status
6505 * flags may be updated on the conn_stream.
6506 */
Christopher Fauletd44a9b32018-07-27 11:59:41 +02006507static size_t h2_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
Willy Tarreau62f52692017-10-08 23:01:42 +02006508{
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006509 struct h2s *h2s = cs->ctx;
Willy Tarreau1dc41e72018-06-14 13:21:28 +02006510 size_t total = 0;
Willy Tarreau5dd17352018-06-14 13:33:30 +02006511 size_t ret;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006512 struct htx *htx;
6513 struct htx_blk *blk;
6514 enum htx_blk_type btype;
6515 uint32_t bsize;
6516 int32_t idx;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006517
Willy Tarreau7838a792019-08-12 18:42:03 +02006518 TRACE_ENTER(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
6519
Olivier Houchardd360ac62019-03-22 17:37:16 +01006520 /* If we were not just woken because we wanted to send but couldn't,
6521 * and there's somebody else that is waiting to send, do nothing,
6522 * we will subscribe later and be put at the end of the list
6523 */
Willy Tarreaud9464162020-01-10 18:25:07 +01006524 if (!(h2s->flags & H2_SF_NOTIFIED) &&
Willy Tarreau7838a792019-08-12 18:42:03 +02006525 (!LIST_ISEMPTY(&h2s->h2c->send_list) || !LIST_ISEMPTY(&h2s->h2c->fctl_list))) {
6526 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 +01006527 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006528 }
Willy Tarreaud9464162020-01-10 18:25:07 +01006529 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02006530
Willy Tarreau7838a792019-08-12 18:42:03 +02006531 if (h2s->h2c->st0 < H2_CS_FRAME_H) {
6532 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 +02006533 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006534 }
Willy Tarreau6bf641a2018-10-08 09:43:03 +02006535
Willy Tarreaucab22952019-10-31 15:48:18 +01006536 if (h2s->h2c->st0 >= H2_CS_ERROR) {
6537 cs->flags |= CS_FL_ERROR;
6538 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);
6539 return 0;
6540 }
6541
Christopher Faulet9b79a102019-07-15 11:22:56 +02006542 htx = htx_from_buf(buf);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006543
Willy Tarreau0bad0432018-06-14 16:54:01 +02006544 if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count)
Willy Tarreauc4312d32017-11-07 12:01:53 +01006545 h2s->flags |= H2_SF_OUTGOING_DATA;
6546
Willy Tarreau751f2d02018-10-05 09:35:00 +02006547 if (h2s->id == 0) {
6548 int32_t id = h2c_get_next_sid(h2s->h2c);
6549
6550 if (id < 0) {
Willy Tarreau751f2d02018-10-05 09:35:00 +02006551 cs->flags |= CS_FL_ERROR;
Willy Tarreau7838a792019-08-12 18:42:03 +02006552 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 +02006553 return 0;
6554 }
6555
6556 eb32_delete(&h2s->by_id);
6557 h2s->by_id.key = h2s->id = id;
6558 h2s->h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01006559 h2s->h2c->nb_reserved--;
Willy Tarreau751f2d02018-10-05 09:35:00 +02006560 eb32_insert(&h2s->h2c->streams_by_id, &h2s->by_id);
6561 }
6562
Christopher Faulet9b79a102019-07-15 11:22:56 +02006563 while (h2s->st < H2_SS_HLOC && !(h2s->flags & H2_SF_BLK_ANY) &&
6564 count && !htx_is_empty(htx)) {
6565 idx = htx_get_head(htx);
6566 blk = htx_get_blk(htx, idx);
6567 btype = htx_get_blk_type(blk);
6568 bsize = htx_get_blksz(blk);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006569
Christopher Faulet9b79a102019-07-15 11:22:56 +02006570 switch (btype) {
Willy Tarreau80739692018-10-05 11:35:57 +02006571 case HTX_BLK_REQ_SL:
6572 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006573 ret = h2s_bck_make_req_headers(h2s, htx);
Willy Tarreau80739692018-10-05 11:35:57 +02006574 if (ret > 0) {
6575 total += ret;
6576 count -= ret;
6577 if (ret < bsize)
6578 goto done;
6579 }
6580 break;
6581
Willy Tarreau115e83b2018-12-01 19:17:53 +01006582 case HTX_BLK_RES_SL:
6583 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006584 ret = h2s_frt_make_resp_headers(h2s, htx);
Willy Tarreau115e83b2018-12-01 19:17:53 +01006585 if (ret > 0) {
6586 total += ret;
6587 count -= ret;
6588 if (ret < bsize)
6589 goto done;
6590 }
6591 break;
6592
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006593 case HTX_BLK_DATA:
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006594 /* all these cause the emission of a DATA frame (possibly empty) */
Christopher Faulet991febd2020-12-02 15:17:31 +01006595 if (!(h2s->h2c->flags & H2_CF_IS_BACK) &&
6596 (h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_BODYLESS_RESP)) == H2_SF_BODYLESS_RESP)
6597 ret = h2s_skip_data(h2s, buf, count);
6598 else
6599 ret = h2s_make_data(h2s, buf, count);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006600 if (ret > 0) {
Willy Tarreau98de12a2018-12-12 07:03:00 +01006601 htx = htx_from_buf(buf);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006602 total += ret;
6603 count -= ret;
6604 if (ret < bsize)
6605 goto done;
6606 }
6607 break;
6608
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006609 case HTX_BLK_TLR:
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006610 case HTX_BLK_EOT:
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006611 /* This is the first trailers block, all the subsequent ones */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006612 ret = h2s_make_trailers(h2s, htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006613 if (ret > 0) {
6614 total += ret;
6615 count -= ret;
6616 if (ret < bsize)
6617 goto done;
6618 }
6619 break;
6620
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006621 default:
6622 htx_remove_blk(htx, blk);
6623 total += bsize;
6624 count -= bsize;
6625 break;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006626 }
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006627 }
6628
Christopher Faulet9b79a102019-07-15 11:22:56 +02006629 done:
Willy Tarreau2b778482019-05-06 15:00:22 +02006630 if (h2s->st >= H2_SS_HLOC) {
Willy Tarreau00610962018-07-19 10:58:28 +02006631 /* trim any possibly pending data after we close (extra CR-LF,
6632 * unprocessed trailers, abnormal extra data, ...)
6633 */
Willy Tarreau0bad0432018-06-14 16:54:01 +02006634 total += count;
6635 count = 0;
Willy Tarreau00610962018-07-19 10:58:28 +02006636 }
6637
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006638 /* RST are sent similarly to frame acks */
Willy Tarreau02492192017-12-07 15:59:29 +01006639 if (h2s->st == H2_SS_ERROR || h2s->flags & H2_SF_RST_RCVD) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006640 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 +01006641 cs_set_error(cs);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01006642 if (h2s_send_rst_stream(h2s->h2c, h2s) > 0)
Willy Tarreau00dd0782018-03-01 16:31:34 +01006643 h2s_close(h2s);
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006644 }
6645
Christopher Faulet9b79a102019-07-15 11:22:56 +02006646 htx_to_buf(htx, buf);
Olivier Houchardd846c262018-10-19 17:24:29 +02006647
Olivier Houchard7505f942018-08-21 18:10:44 +02006648 if (total > 0) {
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006649 if (!(h2s->h2c->wait_event.events & SUB_RETRY_SEND)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006650 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 +02006651 tasklet_wakeup(h2s->h2c->wait_event.tasklet);
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006652 }
Olivier Houchardd846c262018-10-19 17:24:29 +02006653
Olivier Houchard7505f942018-08-21 18:10:44 +02006654 }
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01006655 /* If we're waiting for flow control, and we got a shutr on the
6656 * connection, we will never be unlocked, so add an error on
6657 * the conn_stream.
6658 */
6659 if (conn_xprt_read0_pending(h2s->h2c->conn) &&
6660 !b_data(&h2s->h2c->dbuf) &&
6661 (h2s->flags & (H2_SF_BLK_SFCTL | H2_SF_BLK_MFCTL))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006662 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 +01006663 if (cs->flags & CS_FL_EOS)
6664 cs->flags |= CS_FL_ERROR;
6665 else
6666 cs->flags |= CS_FL_ERR_PENDING;
6667 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006668
Willy Tarreau5723f292020-01-10 15:16:57 +01006669 if (total > 0 && !(h2s->flags & H2_SF_BLK_SFCTL) &&
6670 !(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006671 /* Ok we managed to send something, leave the send_list if we were still there */
Olivier Houchardd360ac62019-03-22 17:37:16 +01006672 LIST_DEL_INIT(&h2s->list);
6673 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006674
Willy Tarreau7838a792019-08-12 18:42:03 +02006675 TRACE_LEAVE(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006676 return total;
Willy Tarreau62f52692017-10-08 23:01:42 +02006677}
6678
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006679/* for debugging with CLI's "show fd" command */
Willy Tarreau8050efe2021-01-21 08:26:06 +01006680static int h2_show_fd(struct buffer *msg, struct connection *conn)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006681{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01006682 struct h2c *h2c = conn->ctx;
Willy Tarreau987c0632018-12-18 10:32:05 +01006683 struct h2s *h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006684 struct eb32_node *node;
6685 int fctl_cnt = 0;
6686 int send_cnt = 0;
6687 int tree_cnt = 0;
6688 int orph_cnt = 0;
Willy Tarreau60f62682019-05-26 11:32:27 +02006689 struct buffer *hmbuf, *tmbuf;
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006690 int ret = 0;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006691
6692 if (!h2c)
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006693 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006694
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006695 list_for_each_entry(h2s, &h2c->fctl_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006696 fctl_cnt++;
6697
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006698 list_for_each_entry(h2s, &h2c->send_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006699 send_cnt++;
6700
Willy Tarreau3af37712018-12-18 14:34:41 +01006701 h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006702 node = eb32_first(&h2c->streams_by_id);
6703 while (node) {
6704 h2s = container_of(node, struct h2s, by_id);
6705 tree_cnt++;
6706 if (!h2s->cs)
6707 orph_cnt++;
6708 node = eb32_next(node);
6709 }
6710
Willy Tarreau60f62682019-05-26 11:32:27 +02006711 hmbuf = br_head(h2c->mbuf);
Willy Tarreaubcc45952019-05-26 10:05:50 +02006712 tmbuf = br_tail(h2c->mbuf);
Willy Tarreauab2ec452019-08-30 07:07:08 +02006713 chunk_appendf(msg, " h2c.st0=%s .err=%d .maxid=%d .lastid=%d .flg=0x%04x"
Willy Tarreau987c0632018-12-18 10:32:05 +01006714 " .nbst=%u .nbcs=%u .fctl_cnt=%d .send_cnt=%d .tree_cnt=%d"
Willy Tarreau60f62682019-05-26 11:32:27 +02006715 " .orph_cnt=%d .sub=%d .dsi=%d .dbuf=%u@%p+%u/%u .msi=%d"
6716 " .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]",
Willy Tarreauab2ec452019-08-30 07:07:08 +02006717 h2c_st_to_str(h2c->st0), h2c->errcode, h2c->max_id, h2c->last_sid, h2c->flags,
Willy Tarreau616ac812018-07-24 14:12:42 +02006718 h2c->nb_streams, h2c->nb_cs, fctl_cnt, send_cnt, tree_cnt, orph_cnt,
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006719 h2c->wait_event.events, h2c->dsi,
Willy Tarreau987c0632018-12-18 10:32:05 +01006720 (unsigned int)b_data(&h2c->dbuf), b_orig(&h2c->dbuf),
6721 (unsigned int)b_head_ofs(&h2c->dbuf), (unsigned int)b_size(&h2c->dbuf),
6722 h2c->msi,
Willy Tarreau60f62682019-05-26 11:32:27 +02006723 br_head_idx(h2c->mbuf), br_tail_idx(h2c->mbuf), br_size(h2c->mbuf),
6724 (unsigned int)b_data(hmbuf), b_orig(hmbuf),
6725 (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf),
Willy Tarreaubcc45952019-05-26 10:05:50 +02006726 (unsigned int)b_data(tmbuf), b_orig(tmbuf),
6727 (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf));
Willy Tarreau987c0632018-12-18 10:32:05 +01006728
6729 if (h2s) {
Willy Tarreaued4464e2021-01-20 15:50:03 +01006730 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 +02006731 h2s, h2s->id, h2s_st_to_str(h2s->st), h2s->flags,
Willy Tarreau987c0632018-12-18 10:32:05 +01006732 (unsigned int)b_data(&h2s->rxbuf), b_orig(&h2s->rxbuf),
6733 (unsigned int)b_head_ofs(&h2s->rxbuf), (unsigned int)b_size(&h2s->rxbuf),
6734 h2s->cs);
6735 if (h2s->cs)
Willy Tarreau98e40b92021-01-20 16:27:01 +01006736 chunk_appendf(msg, "(.flg=0x%08x .data=%p)",
Willy Tarreau987c0632018-12-18 10:32:05 +01006737 h2s->cs->flags, h2s->cs->data);
Willy Tarreau98e40b92021-01-20 16:27:01 +01006738
6739 chunk_appendf(&trash, " .subs=%p", h2s->subs);
6740 if (h2s->subs) {
Christopher Faulet6c93c4e2021-02-25 10:06:29 +01006741 chunk_appendf(&trash, "(ev=%d tl=%p", h2s->subs->events, h2s->subs->tasklet);
6742 chunk_appendf(&trash, " tl.calls=%d tl.ctx=%p tl.fct=",
6743 h2s->subs->tasklet->calls,
6744 h2s->subs->tasklet->context);
6745 if (h2s->subs->tasklet->calls >= 1000000)
6746 ret = 1;
6747 resolve_sym_name(&trash, NULL, h2s->subs->tasklet->process);
6748 chunk_appendf(&trash, ")");
Willy Tarreau98e40b92021-01-20 16:27:01 +01006749 }
Willy Tarreau987c0632018-12-18 10:32:05 +01006750 }
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006751 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006752}
Willy Tarreau62f52692017-10-08 23:01:42 +02006753
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006754/* Migrate the the connection to the current thread.
6755 * Return 0 if successful, non-zero otherwise.
6756 * Expected to be called with the old thread lock held.
6757 */
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006758static int h2_takeover(struct connection *conn, int orig_tid)
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006759{
6760 struct h2c *h2c = conn->ctx;
Willy Tarreau617e80f2020-07-01 16:39:33 +02006761 struct task *task;
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006762
6763 if (fd_takeover(conn->handle.fd, conn) != 0)
6764 return -1;
Olivier Houcharda74bb7e2020-07-03 14:01:21 +02006765
6766 if (conn->xprt->takeover && conn->xprt->takeover(conn, conn->xprt_ctx, orig_tid) != 0) {
6767 /* We failed to takeover the xprt, even if the connection may
6768 * still be valid, flag it as error'd, as we have already
6769 * taken over the fd, and wake the tasklet, so that it will
6770 * destroy it.
6771 */
6772 conn->flags |= CO_FL_ERROR;
6773 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
6774 return -1;
6775 }
6776
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006777 if (h2c->wait_event.events)
6778 h2c->conn->xprt->unsubscribe(h2c->conn, h2c->conn->xprt_ctx,
6779 h2c->wait_event.events, &h2c->wait_event);
6780 /* To let the tasklet know it should free itself, and do nothing else,
6781 * set its context to NULL.
6782 */
6783 h2c->wait_event.tasklet->context = NULL;
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006784 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
Willy Tarreau617e80f2020-07-01 16:39:33 +02006785
6786 task = h2c->task;
6787 if (task) {
6788 task->context = NULL;
6789 h2c->task = NULL;
6790 __ha_barrier_store();
6791 task_kill(task);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006792
6793 h2c->task = task_new(tid_bit);
6794 if (!h2c->task) {
6795 h2_release(h2c);
6796 return -1;
6797 }
6798 h2c->task->process = h2_timeout_task;
6799 h2c->task->context = h2c;
6800 }
6801 h2c->wait_event.tasklet = tasklet_new();
6802 if (!h2c->wait_event.tasklet) {
6803 h2_release(h2c);
6804 return -1;
6805 }
6806 h2c->wait_event.tasklet->process = h2_io_cb;
6807 h2c->wait_event.tasklet->context = h2c;
6808 h2c->conn->xprt->subscribe(h2c->conn, h2c->conn->xprt_ctx,
6809 SUB_RETRY_RECV, &h2c->wait_event);
6810
6811 return 0;
6812}
6813
Willy Tarreau62f52692017-10-08 23:01:42 +02006814/*******************************************************/
6815/* functions below are dedicated to the config parsers */
6816/*******************************************************/
6817
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006818/* config parser for global "tune.h2.header-table-size" */
6819static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006820 const struct proxy *defpx, const char *file, int line,
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006821 char **err)
6822{
6823 if (too_many_args(1, args, err, NULL))
6824 return -1;
6825
6826 h2_settings_header_table_size = atoi(args[1]);
6827 if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) {
6828 memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]);
6829 return -1;
6830 }
6831 return 0;
6832}
Willy Tarreau62f52692017-10-08 23:01:42 +02006833
Willy Tarreaue6baec02017-07-27 11:45:11 +02006834/* config parser for global "tune.h2.initial-window-size" */
6835static int h2_parse_initial_window_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006836 const struct proxy *defpx, const char *file, int line,
Willy Tarreaue6baec02017-07-27 11:45:11 +02006837 char **err)
6838{
6839 if (too_many_args(1, args, err, NULL))
6840 return -1;
6841
6842 h2_settings_initial_window_size = atoi(args[1]);
6843 if (h2_settings_initial_window_size < 0) {
6844 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6845 return -1;
6846 }
6847 return 0;
6848}
6849
Willy Tarreau5242ef82017-07-27 11:47:28 +02006850/* config parser for global "tune.h2.max-concurrent-streams" */
6851static int h2_parse_max_concurrent_streams(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006852 const struct proxy *defpx, const char *file, int line,
Willy Tarreau5242ef82017-07-27 11:47:28 +02006853 char **err)
6854{
6855 if (too_many_args(1, args, err, NULL))
6856 return -1;
6857
6858 h2_settings_max_concurrent_streams = atoi(args[1]);
Willy Tarreau5a490b62019-01-31 10:39:51 +01006859 if ((int)h2_settings_max_concurrent_streams < 0) {
Willy Tarreau5242ef82017-07-27 11:47:28 +02006860 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6861 return -1;
6862 }
6863 return 0;
6864}
6865
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006866/* config parser for global "tune.h2.max-frame-size" */
6867static int h2_parse_max_frame_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006868 const struct proxy *defpx, const char *file, int line,
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006869 char **err)
6870{
6871 if (too_many_args(1, args, err, NULL))
6872 return -1;
6873
6874 h2_settings_max_frame_size = atoi(args[1]);
6875 if (h2_settings_max_frame_size < 16384 || h2_settings_max_frame_size > 16777215) {
6876 memprintf(err, "'%s' expects a numeric value between 16384 and 16777215.", args[0]);
6877 return -1;
6878 }
6879 return 0;
6880}
6881
Willy Tarreau62f52692017-10-08 23:01:42 +02006882
6883/****************************************/
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05006884/* MUX initialization and instantiation */
Willy Tarreau62f52692017-10-08 23:01:42 +02006885/***************************************/
6886
6887/* The mux operations */
Willy Tarreau680b2bd2018-11-27 07:30:17 +01006888static const struct mux_ops h2_ops = {
Willy Tarreau62f52692017-10-08 23:01:42 +02006889 .init = h2_init,
Olivier Houchard21df6cc2018-09-14 23:21:44 +02006890 .wake = h2_wake,
Willy Tarreau62f52692017-10-08 23:01:42 +02006891 .snd_buf = h2_snd_buf,
Olivier Houchard511efea2018-08-16 15:30:32 +02006892 .rcv_buf = h2_rcv_buf,
Olivier Houchard6ff20392018-07-17 18:46:31 +02006893 .subscribe = h2_subscribe,
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006894 .unsubscribe = h2_unsubscribe,
Willy Tarreau62f52692017-10-08 23:01:42 +02006895 .attach = h2_attach,
Willy Tarreaufafd3982018-11-18 21:29:20 +01006896 .get_first_cs = h2_get_first_cs,
Willy Tarreau62f52692017-10-08 23:01:42 +02006897 .detach = h2_detach,
Olivier Houchard060ed432018-11-06 16:32:42 +01006898 .destroy = h2_destroy,
Olivier Houchardd540b362018-11-05 18:37:53 +01006899 .avail_streams = h2_avail_streams,
Willy Tarreau00f18a32019-01-26 12:19:01 +01006900 .used_streams = h2_used_streams,
Willy Tarreau62f52692017-10-08 23:01:42 +02006901 .shutr = h2_shutr,
6902 .shutw = h2_shutw,
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02006903 .ctl = h2_ctl,
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006904 .show_fd = h2_show_fd,
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006905 .takeover = h2_takeover,
Christopher Fauleta4600572021-03-08 15:28:28 +01006906 .flags = MX_FL_CLEAN_ABRT|MX_FL_HTX|MX_FL_HOL_RISK|MX_FL_NO_UPG,
Willy Tarreau62f52692017-10-08 23:01:42 +02006907 .name = "H2",
6908};
6909
Christopher Faulet32f61c02018-04-10 14:33:41 +02006910static struct mux_proto_list mux_proto_h2 =
Christopher Fauletc985f6c2019-07-15 11:42:52 +02006911 { .token = IST("h2"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BOTH, .mux = &h2_ops };
Willy Tarreau62f52692017-10-08 23:01:42 +02006912
Willy Tarreau0108d902018-11-25 19:14:37 +01006913INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2);
6914
Willy Tarreau62f52692017-10-08 23:01:42 +02006915/* config keyword parsers */
6916static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006917 { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size },
Willy Tarreaue6baec02017-07-27 11:45:11 +02006918 { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size },
Willy Tarreau5242ef82017-07-27 11:47:28 +02006919 { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006920 { CFG_GLOBAL, "tune.h2.max-frame-size", h2_parse_max_frame_size },
Willy Tarreau62f52692017-10-08 23:01:42 +02006921 { 0, NULL, NULL }
6922}};
6923
Willy Tarreau0108d902018-11-25 19:14:37 +01006924INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
Willy Tarreau2bdcc702020-05-19 11:31:11 +02006925
6926/* initialize internal structs after the config is parsed.
6927 * Returns zero on success, non-zero on error.
6928 */
6929static int init_h2()
6930{
6931 pool_head_hpack_tbl = create_pool("hpack_tbl",
6932 h2_settings_header_table_size,
6933 MEM_F_SHARED|MEM_F_EXACT);
Christopher Faulet52140992020-11-06 15:23:39 +01006934 if (!pool_head_hpack_tbl) {
6935 ha_alert("failed to allocate hpack_tbl memory pool\n");
6936 return (ERR_ALERT | ERR_FATAL);
6937 }
6938 return ERR_NONE;
Willy Tarreau2bdcc702020-05-19 11:31:11 +02006939}
6940
6941REGISTER_POST_CHECK(init_h2);