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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 Tarreau6c3eeca2022-08-18 11:19:57 +020064#define H2_CF_DEM_IN_PROGRESS 0x00000400 // demux in progress (dsi,dfl,dft are valid)
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020065
Willy Tarreau081d4722017-05-16 21:51:05 +020066/* other flags */
Willy Tarreauf2101912018-07-19 10:11:38 +020067#define H2_CF_GOAWAY_SENT 0x00001000 // a GOAWAY frame was successfully sent
68#define H2_CF_GOAWAY_FAILED 0x00002000 // a GOAWAY frame failed to be sent
69#define H2_CF_WAIT_FOR_HS 0x00004000 // We did check that at least a stream was waiting for handshake
Willy Tarreaub3fb56d2018-10-03 13:56:38 +020070#define H2_CF_IS_BACK 0x00008000 // this is an outgoing connection
Willy Tarreau3d4631f2021-01-20 10:53:13 +010071#define H2_CF_WINDOW_OPENED 0x00010000 // demux increased window already advertised
72#define H2_CF_RCVD_SHUT 0x00020000 // a recv() attempt already failed on a shutdown
73#define H2_CF_END_REACHED 0x00040000 // pending data too short with RCVD_SHUT present
Willy Tarreau081d4722017-05-16 21:51:05 +020074
Amaury Denoyelle68993a12021-10-18 09:43:29 +020075#define H2_CF_RCVD_RFC8441 0x00100000 // settings from RFC8441 has been received indicating support for Extended CONNECT
Willy Tarreau8a4dca02022-01-13 16:00:12 +010076#define H2_CF_SHTS_UPDATED 0x00200000 // SETTINGS_HEADER_TABLE_SIZE updated
77#define H2_CF_DTSU_EMITTED 0x00400000 // HPACK Dynamic Table Size Update opcode emitted
Amaury Denoyelle68993a12021-10-18 09:43:29 +020078
Willy Tarreau5ab6b572017-09-22 08:05:00 +020079/* H2 connection state, in h2c->st0 */
80enum h2_cs {
81 H2_CS_PREFACE, // init done, waiting for connection preface
82 H2_CS_SETTINGS1, // preface OK, waiting for first settings frame
83 H2_CS_FRAME_H, // first settings frame ok, waiting for frame header
84 H2_CS_FRAME_P, // frame header OK, waiting for frame payload
Willy Tarreaua20a5192017-12-27 11:02:06 +010085 H2_CS_FRAME_A, // frame payload OK, trying to send ACK frame
86 H2_CS_FRAME_E, // frame payload OK, trying to send RST frame
Willy Tarreau5ab6b572017-09-22 08:05:00 +020087 H2_CS_ERROR, // send GOAWAY(errcode) and close the connection ASAP
88 H2_CS_ERROR2, // GOAWAY(errcode) sent, close the connection ASAP
89 H2_CS_ENTRIES // must be last
90} __attribute__((packed));
91
Willy Tarreau51330962019-05-26 09:38:07 +020092
Willy Tarreau9c218e72019-05-26 10:08:28 +020093/* 32 buffers: one for the ring's root, rest for the mbuf itself */
94#define H2C_MBUF_CNT 32
Willy Tarreau51330962019-05-26 09:38:07 +020095
Willy Tarreau5ab6b572017-09-22 08:05:00 +020096/* H2 connection descriptor */
97struct h2c {
98 struct connection *conn;
99
100 enum h2_cs st0; /* mux state */
101 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
102
103 /* 16 bit hole here */
104 uint32_t flags; /* connection flags: H2_CF_* */
Willy Tarreau2e2083a2019-01-31 10:34:07 +0100105 uint32_t streams_limit; /* maximum number of concurrent streams the peer supports */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200106 int32_t max_id; /* highest ID known on this connection, <0 before preface */
107 uint32_t rcvd_c; /* newly received data to ACK for the connection */
Willy Tarreau1d7138e2022-06-08 16:32:22 +0200108 uint32_t rcvd_s; /* newly received data to ACK for the current stream (dsi) or zero */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200109
110 /* states for the demux direction */
111 struct hpack_dht *ddht; /* demux dynamic header table */
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200112 struct buffer dbuf; /* demux buffer */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200113
114 int32_t dsi; /* demux stream ID (<0 = idle) */
115 int32_t dfl; /* demux frame length (if dsi >= 0) */
116 int8_t dft; /* demux frame type (if dsi >= 0) */
117 int8_t dff; /* demux frame flags (if dsi >= 0) */
Willy Tarreau05e5daf2017-12-11 15:17:36 +0100118 uint8_t dpl; /* demux pad length (part of dfl), init to 0 */
119 /* 8 bit hole here */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200120 int32_t last_sid; /* last processed stream ID for GOAWAY, <0 before preface */
121
122 /* states for the mux direction */
Willy Tarreau51330962019-05-26 09:38:07 +0200123 struct buffer mbuf[H2C_MBUF_CNT]; /* mux buffers (ring) */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200124 int32_t msi; /* mux stream ID (<0 = idle) */
125 int32_t mfl; /* mux frame length (if dsi >= 0) */
126 int8_t mft; /* mux frame type (if dsi >= 0) */
127 int8_t mff; /* mux frame flags (if dsi >= 0) */
128 /* 16 bit hole here */
129 int32_t miw; /* mux initial window size for all new streams */
130 int32_t mws; /* mux window size. Can be negative. */
131 int32_t mfs; /* mux's max frame size */
132
Willy Tarreauea392822017-10-31 10:02:25 +0100133 int timeout; /* idle timeout duration in ticks */
Willy Tarreau599391a2017-11-24 10:16:00 +0100134 int shut_timeout; /* idle timeout duration in ticks after GOAWAY was sent */
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +0100135 int idle_start; /* date of the last time the connection went idle */
136 /* 32-bit hole here */
Willy Tarreau49745612017-12-03 18:56:02 +0100137 unsigned int nb_streams; /* number of streams in the tree */
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200138 unsigned int nb_cs; /* number of attached conn_streams */
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100139 unsigned int nb_reserved; /* number of reserved streams */
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100140 unsigned int stream_cnt; /* total number of streams seen */
Willy Tarreau0b37d652018-10-03 10:33:02 +0200141 struct proxy *proxy; /* the proxy this connection was created for */
Willy Tarreauea392822017-10-31 10:02:25 +0100142 struct task *task; /* timeout management task */
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100143 struct h2_counters *px_counters; /* h2 counters attached to proxy */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200144 struct eb_root streams_by_id; /* all active streams by their ID */
145 struct list send_list; /* list of blocked streams requesting to send */
146 struct list fctl_list; /* list of streams blocked by connection's fctl */
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200147 struct list blocked_list; /* list of streams blocked for other reasons (e.g. sfctl, dep) */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100148 struct buffer_wait buf_wait; /* wait list for buffer allocations */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200149 struct wait_event wait_event; /* To be used if we're waiting for I/Os */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200150};
151
Willy Tarreau18312642017-10-11 07:57:07 +0200152/* H2 stream state, in h2s->st */
153enum h2_ss {
154 H2_SS_IDLE = 0, // idle
155 H2_SS_RLOC, // reserved(local)
156 H2_SS_RREM, // reserved(remote)
157 H2_SS_OPEN, // open
158 H2_SS_HREM, // half-closed(remote)
159 H2_SS_HLOC, // half-closed(local)
Willy Tarreau96060ba2017-10-16 18:34:34 +0200160 H2_SS_ERROR, // an error needs to be sent using RST_STREAM
Willy Tarreau18312642017-10-11 07:57:07 +0200161 H2_SS_CLOSED, // closed
162 H2_SS_ENTRIES // must be last
163} __attribute__((packed));
164
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200165#define H2_SS_MASK(state) (1UL << (state))
166#define H2_SS_IDLE_BIT (1UL << H2_SS_IDLE)
167#define H2_SS_RLOC_BIT (1UL << H2_SS_RLOC)
168#define H2_SS_RREM_BIT (1UL << H2_SS_RREM)
169#define H2_SS_OPEN_BIT (1UL << H2_SS_OPEN)
170#define H2_SS_HREM_BIT (1UL << H2_SS_HREM)
171#define H2_SS_HLOC_BIT (1UL << H2_SS_HLOC)
172#define H2_SS_ERROR_BIT (1UL << H2_SS_ERROR)
173#define H2_SS_CLOSED_BIT (1UL << H2_SS_CLOSED)
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200174
Willy Tarreau18312642017-10-11 07:57:07 +0200175/* HTTP/2 stream flags (32 bit), in h2s->flags */
176#define H2_SF_NONE 0x00000000
177#define H2_SF_ES_RCVD 0x00000001
178#define H2_SF_ES_SENT 0x00000002
179
180#define H2_SF_RST_RCVD 0x00000004 // received RST_STREAM
181#define H2_SF_RST_SENT 0x00000008 // sent RST_STREAM
182
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200183/* stream flags indicating the reason the stream is blocked */
184#define H2_SF_BLK_MBUSY 0x00000010 // blocked waiting for mux access (transient)
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200185#define H2_SF_BLK_MROOM 0x00000020 // blocked waiting for room in the mux (must be in send list)
186#define H2_SF_BLK_MFCTL 0x00000040 // blocked due to mux fctl (must be in fctl list)
187#define H2_SF_BLK_SFCTL 0x00000080 // blocked due to stream fctl (must be in blocked list)
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200188#define H2_SF_BLK_ANY 0x000000F0 // any of the reasons above
189
Willy Tarreau454f9052017-10-26 19:40:35 +0200190/* stream flags indicating how data is supposed to be sent */
191#define H2_SF_DATA_CLEN 0x00000100 // data sent using content-length
Christopher Faulet7d247f02020-12-02 14:26:36 +0100192#define H2_SF_BODYLESS_RESP 0x00000200 /* Bodyless response message */
Christopher Fauletd0db4232021-01-22 11:46:30 +0100193#define H2_SF_BODY_TUNNEL 0x00000400 // Attempt to establish a Tunnelled stream (the result depends on the status code)
194
Willy Tarreau454f9052017-10-26 19:40:35 +0200195
Willy Tarreaud9464162020-01-10 18:25:07 +0100196#define H2_SF_NOTIFIED 0x00000800 // a paused stream was notified to try to send again
Willy Tarreau67434202017-11-06 20:20:51 +0100197#define H2_SF_HEADERS_SENT 0x00001000 // a HEADERS frame was sent for this stream
Willy Tarreauc4312d32017-11-07 12:01:53 +0100198#define H2_SF_OUTGOING_DATA 0x00002000 // set whenever we've seen outgoing data
Willy Tarreau67434202017-11-06 20:20:51 +0100199
Willy Tarreau6cc85a52019-01-02 15:49:20 +0100200#define H2_SF_HEADERS_RCVD 0x00004000 // a HEADERS frame was received for this stream
201
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200202#define H2_SF_WANT_SHUTR 0x00008000 // a stream couldn't shutr() (mux full/busy)
203#define H2_SF_WANT_SHUTW 0x00010000 // a stream couldn't shutw() (mux full/busy)
Willy Tarreau3cf69fe2019-05-14 10:44:40 +0200204#define H2_SF_KILL_CONN 0x00020000 // kill the whole connection with this stream
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200205
Amaury Denoyelle5fb48ea2020-12-11 17:53:04 +0100206#define H2_SF_EXT_CONNECT_SENT 0x00040000 // rfc 8441 an Extended CONNECT has been sent
Amaury Denoyelleefe22762020-12-11 17:53:08 +0100207#define H2_SF_EXT_CONNECT_RCVD 0x00080000 // rfc 8441 an Extended CONNECT has been received and parsed
Christopher Fauletd0db4232021-01-22 11:46:30 +0100208
Amaury Denoyelle5fb48ea2020-12-11 17:53:04 +0100209#define H2_SF_TUNNEL_ABRT 0x00100000 // A tunnel attempt was aborted
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200210
Willy Tarreau18312642017-10-11 07:57:07 +0200211/* H2 stream descriptor, describing the stream as it appears in the H2C, and as
Christopher Fauletfafd1b02020-11-03 18:25:52 +0100212 * it is being processed in the internal HTTP representation (HTX).
Willy Tarreau18312642017-10-11 07:57:07 +0200213 */
214struct h2s {
215 struct conn_stream *cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +0100216 struct session *sess;
Willy Tarreau18312642017-10-11 07:57:07 +0200217 struct h2c *h2c;
Willy Tarreau18312642017-10-11 07:57:07 +0200218 struct eb32_node by_id; /* place in h2c's streams_by_id */
Willy Tarreau18312642017-10-11 07:57:07 +0200219 int32_t id; /* stream ID */
220 uint32_t flags; /* H2_SF_* */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +0200221 int sws; /* stream window size, to be added to the mux's initial window size */
Willy Tarreau18312642017-10-11 07:57:07 +0200222 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
223 enum h2_ss st;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +0200224 uint16_t status; /* HTTP response status */
Willy Tarreau1915ca22019-01-24 11:49:37 +0100225 unsigned long long body_len; /* remaining body length according to content-length if H2_SF_DATA_CLEN */
Olivier Houchard638b7992018-08-16 15:41:52 +0200226 struct buffer rxbuf; /* receive buffer, always valid (buf_empty or real buffer) */
Willy Tarreauf96508a2020-01-10 11:12:48 +0100227 struct wait_event *subs; /* recv wait_event the conn_stream associated is waiting on (via h2_subscribe) */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200228 struct list list; /* To be used when adding in h2c->send_list or h2c->fctl_lsit */
Willy Tarreau5723f292020-01-10 15:16:57 +0100229 struct tasklet *shut_tl; /* deferred shutdown tasklet, to retry to send an RST after we failed to,
230 * in case there's no other subscription to do it */
Amaury Denoyelle74162742020-12-11 17:53:05 +0100231
232 char upgrade_protocol[16]; /* rfc 8441: requested protocol on Extended CONNECT */
Willy Tarreau18312642017-10-11 07:57:07 +0200233};
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200234
Willy Tarreauc6405142017-09-21 20:23:50 +0200235/* descriptor for an h2 frame header */
236struct h2_fh {
237 uint32_t len; /* length, host order, 24 bits */
238 uint32_t sid; /* stream id, host order, 31 bits */
239 uint8_t ft; /* frame type */
240 uint8_t ff; /* frame flags */
241};
242
Willy Tarreau12ae2122019-08-08 18:23:12 +0200243/* trace source and events */
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200244static void h2_trace(enum trace_level level, uint64_t mask, \
245 const struct trace_source *src,
246 const struct ist where, const struct ist func,
247 const void *a1, const void *a2, const void *a3, const void *a4);
Willy Tarreau12ae2122019-08-08 18:23:12 +0200248
249/* The event representation is split like this :
250 * strm - application layer
251 * h2s - internal H2 stream
252 * h2c - internal H2 connection
253 * conn - external connection
254 *
255 */
256static const struct trace_event h2_trace_events[] = {
257#define H2_EV_H2C_NEW (1ULL << 0)
Willy Tarreau87951942019-08-30 07:34:36 +0200258 { .mask = H2_EV_H2C_NEW, .name = "h2c_new", .desc = "new H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200259#define H2_EV_H2C_RECV (1ULL << 1)
Willy Tarreau87951942019-08-30 07:34:36 +0200260 { .mask = H2_EV_H2C_RECV, .name = "h2c_recv", .desc = "Rx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200261#define H2_EV_H2C_SEND (1ULL << 2)
Willy Tarreau87951942019-08-30 07:34:36 +0200262 { .mask = H2_EV_H2C_SEND, .name = "h2c_send", .desc = "Tx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200263#define H2_EV_H2C_FCTL (1ULL << 3)
Willy Tarreau87951942019-08-30 07:34:36 +0200264 { .mask = H2_EV_H2C_FCTL, .name = "h2c_fctl", .desc = "H2 connection flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200265#define H2_EV_H2C_BLK (1ULL << 4)
Willy Tarreau87951942019-08-30 07:34:36 +0200266 { .mask = H2_EV_H2C_BLK, .name = "h2c_blk", .desc = "H2 connection blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200267#define H2_EV_H2C_WAKE (1ULL << 5)
Willy Tarreau87951942019-08-30 07:34:36 +0200268 { .mask = H2_EV_H2C_WAKE, .name = "h2c_wake", .desc = "H2 connection woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200269#define H2_EV_H2C_END (1ULL << 6)
Willy Tarreau87951942019-08-30 07:34:36 +0200270 { .mask = H2_EV_H2C_END, .name = "h2c_end", .desc = "H2 connection terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200271#define H2_EV_H2C_ERR (1ULL << 7)
Willy Tarreau87951942019-08-30 07:34:36 +0200272 { .mask = H2_EV_H2C_ERR, .name = "h2c_err", .desc = "error on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200273#define H2_EV_RX_FHDR (1ULL << 8)
Willy Tarreau87951942019-08-30 07:34:36 +0200274 { .mask = H2_EV_RX_FHDR, .name = "rx_fhdr", .desc = "H2 frame header received" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200275#define H2_EV_RX_FRAME (1ULL << 9)
Willy Tarreau87951942019-08-30 07:34:36 +0200276 { .mask = H2_EV_RX_FRAME, .name = "rx_frame", .desc = "receipt of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200277#define H2_EV_RX_EOI (1ULL << 10)
Willy Tarreau87951942019-08-30 07:34:36 +0200278 { .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 +0200279#define H2_EV_RX_PREFACE (1ULL << 11)
Willy Tarreau87951942019-08-30 07:34:36 +0200280 { .mask = H2_EV_RX_PREFACE, .name = "rx_preface", .desc = "receipt of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200281#define H2_EV_RX_DATA (1ULL << 12)
Willy Tarreau87951942019-08-30 07:34:36 +0200282 { .mask = H2_EV_RX_DATA, .name = "rx_data", .desc = "receipt of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200283#define H2_EV_RX_HDR (1ULL << 13)
Willy Tarreau87951942019-08-30 07:34:36 +0200284 { .mask = H2_EV_RX_HDR, .name = "rx_hdr", .desc = "receipt of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200285#define H2_EV_RX_PRIO (1ULL << 14)
Willy Tarreau87951942019-08-30 07:34:36 +0200286 { .mask = H2_EV_RX_PRIO, .name = "rx_prio", .desc = "receipt of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200287#define H2_EV_RX_RST (1ULL << 15)
Willy Tarreau87951942019-08-30 07:34:36 +0200288 { .mask = H2_EV_RX_RST, .name = "rx_rst", .desc = "receipt of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200289#define H2_EV_RX_SETTINGS (1ULL << 16)
Willy Tarreau87951942019-08-30 07:34:36 +0200290 { .mask = H2_EV_RX_SETTINGS, .name = "rx_settings", .desc = "receipt of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200291#define H2_EV_RX_PUSH (1ULL << 17)
Willy Tarreau87951942019-08-30 07:34:36 +0200292 { .mask = H2_EV_RX_PUSH, .name = "rx_push", .desc = "receipt of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200293#define H2_EV_RX_PING (1ULL << 18)
Willy Tarreau87951942019-08-30 07:34:36 +0200294 { .mask = H2_EV_RX_PING, .name = "rx_ping", .desc = "receipt of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200295#define H2_EV_RX_GOAWAY (1ULL << 19)
Willy Tarreau87951942019-08-30 07:34:36 +0200296 { .mask = H2_EV_RX_GOAWAY, .name = "rx_goaway", .desc = "receipt of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200297#define H2_EV_RX_WU (1ULL << 20)
Willy Tarreau87951942019-08-30 07:34:36 +0200298 { .mask = H2_EV_RX_WU, .name = "rx_wu", .desc = "receipt of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200299#define H2_EV_RX_CONT (1ULL << 21)
Willy Tarreau87951942019-08-30 07:34:36 +0200300 { .mask = H2_EV_RX_CONT, .name = "rx_cont", .desc = "receipt of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200301#define H2_EV_TX_FRAME (1ULL << 22)
Willy Tarreau87951942019-08-30 07:34:36 +0200302 { .mask = H2_EV_TX_FRAME, .name = "tx_frame", .desc = "transmission of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200303#define H2_EV_TX_EOI (1ULL << 23)
Willy Tarreau87951942019-08-30 07:34:36 +0200304 { .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 +0200305#define H2_EV_TX_PREFACE (1ULL << 24)
Willy Tarreau87951942019-08-30 07:34:36 +0200306 { .mask = H2_EV_TX_PREFACE, .name = "tx_preface", .desc = "transmission of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200307#define H2_EV_TX_DATA (1ULL << 25)
Willy Tarreau87951942019-08-30 07:34:36 +0200308 { .mask = H2_EV_TX_DATA, .name = "tx_data", .desc = "transmission of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200309#define H2_EV_TX_HDR (1ULL << 26)
Willy Tarreau87951942019-08-30 07:34:36 +0200310 { .mask = H2_EV_TX_HDR, .name = "tx_hdr", .desc = "transmission of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200311#define H2_EV_TX_PRIO (1ULL << 27)
Willy Tarreau87951942019-08-30 07:34:36 +0200312 { .mask = H2_EV_TX_PRIO, .name = "tx_prio", .desc = "transmission of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200313#define H2_EV_TX_RST (1ULL << 28)
Willy Tarreau87951942019-08-30 07:34:36 +0200314 { .mask = H2_EV_TX_RST, .name = "tx_rst", .desc = "transmission of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200315#define H2_EV_TX_SETTINGS (1ULL << 29)
Willy Tarreau87951942019-08-30 07:34:36 +0200316 { .mask = H2_EV_TX_SETTINGS, .name = "tx_settings", .desc = "transmission of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200317#define H2_EV_TX_PUSH (1ULL << 30)
Willy Tarreau87951942019-08-30 07:34:36 +0200318 { .mask = H2_EV_TX_PUSH, .name = "tx_push", .desc = "transmission of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200319#define H2_EV_TX_PING (1ULL << 31)
Willy Tarreau87951942019-08-30 07:34:36 +0200320 { .mask = H2_EV_TX_PING, .name = "tx_ping", .desc = "transmission of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200321#define H2_EV_TX_GOAWAY (1ULL << 32)
Willy Tarreau87951942019-08-30 07:34:36 +0200322 { .mask = H2_EV_TX_GOAWAY, .name = "tx_goaway", .desc = "transmission of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200323#define H2_EV_TX_WU (1ULL << 33)
Willy Tarreau87951942019-08-30 07:34:36 +0200324 { .mask = H2_EV_TX_WU, .name = "tx_wu", .desc = "transmission of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200325#define H2_EV_TX_CONT (1ULL << 34)
Willy Tarreau87951942019-08-30 07:34:36 +0200326 { .mask = H2_EV_TX_CONT, .name = "tx_cont", .desc = "transmission of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200327#define H2_EV_H2S_NEW (1ULL << 35)
Willy Tarreau87951942019-08-30 07:34:36 +0200328 { .mask = H2_EV_H2S_NEW, .name = "h2s_new", .desc = "new H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200329#define H2_EV_H2S_RECV (1ULL << 36)
Willy Tarreau87951942019-08-30 07:34:36 +0200330 { .mask = H2_EV_H2S_RECV, .name = "h2s_recv", .desc = "Rx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200331#define H2_EV_H2S_SEND (1ULL << 37)
Willy Tarreau87951942019-08-30 07:34:36 +0200332 { .mask = H2_EV_H2S_SEND, .name = "h2s_send", .desc = "Tx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200333#define H2_EV_H2S_FCTL (1ULL << 38)
Willy Tarreau87951942019-08-30 07:34:36 +0200334 { .mask = H2_EV_H2S_FCTL, .name = "h2s_fctl", .desc = "H2 stream flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200335#define H2_EV_H2S_BLK (1ULL << 39)
Willy Tarreau87951942019-08-30 07:34:36 +0200336 { .mask = H2_EV_H2S_BLK, .name = "h2s_blk", .desc = "H2 stream blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200337#define H2_EV_H2S_WAKE (1ULL << 40)
Willy Tarreau87951942019-08-30 07:34:36 +0200338 { .mask = H2_EV_H2S_WAKE, .name = "h2s_wake", .desc = "H2 stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200339#define H2_EV_H2S_END (1ULL << 41)
Willy Tarreau87951942019-08-30 07:34:36 +0200340 { .mask = H2_EV_H2S_END, .name = "h2s_end", .desc = "H2 stream terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200341#define H2_EV_H2S_ERR (1ULL << 42)
Willy Tarreau87951942019-08-30 07:34:36 +0200342 { .mask = H2_EV_H2S_ERR, .name = "h2s_err", .desc = "error on H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200343#define H2_EV_STRM_NEW (1ULL << 43)
Willy Tarreau87951942019-08-30 07:34:36 +0200344 { .mask = H2_EV_STRM_NEW, .name = "strm_new", .desc = "app-layer stream creation" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200345#define H2_EV_STRM_RECV (1ULL << 44)
Willy Tarreau87951942019-08-30 07:34:36 +0200346 { .mask = H2_EV_STRM_RECV, .name = "strm_recv", .desc = "receiving data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200347#define H2_EV_STRM_SEND (1ULL << 45)
Willy Tarreau87951942019-08-30 07:34:36 +0200348 { .mask = H2_EV_STRM_SEND, .name = "strm_send", .desc = "sending data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200349#define H2_EV_STRM_FULL (1ULL << 46)
Willy Tarreau87951942019-08-30 07:34:36 +0200350 { .mask = H2_EV_STRM_FULL, .name = "strm_full", .desc = "stream buffer full" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200351#define H2_EV_STRM_WAKE (1ULL << 47)
Willy Tarreau87951942019-08-30 07:34:36 +0200352 { .mask = H2_EV_STRM_WAKE, .name = "strm_wake", .desc = "stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200353#define H2_EV_STRM_SHUT (1ULL << 48)
Willy Tarreau87951942019-08-30 07:34:36 +0200354 { .mask = H2_EV_STRM_SHUT, .name = "strm_shut", .desc = "stream shutdown" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200355#define H2_EV_STRM_END (1ULL << 49)
Willy Tarreau87951942019-08-30 07:34:36 +0200356 { .mask = H2_EV_STRM_END, .name = "strm_end", .desc = "detaching app-layer stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200357#define H2_EV_STRM_ERR (1ULL << 50)
Willy Tarreau87951942019-08-30 07:34:36 +0200358 { .mask = H2_EV_STRM_ERR, .name = "strm_err", .desc = "stream error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200359#define H2_EV_PROTO_ERR (1ULL << 51)
Willy Tarreau87951942019-08-30 07:34:36 +0200360 { .mask = H2_EV_PROTO_ERR, .name = "proto_err", .desc = "protocol error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200361 { }
362};
363
364static const struct name_desc h2_trace_lockon_args[4] = {
365 /* arg1 */ { /* already used by the connection */ },
366 /* arg2 */ { .name="h2s", .desc="H2 stream" },
367 /* arg3 */ { },
368 /* arg4 */ { }
369};
370
371static const struct name_desc h2_trace_decoding[] = {
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200372#define H2_VERB_CLEAN 1
373 { .name="clean", .desc="only user-friendly stuff, generally suitable for level \"user\"" },
374#define H2_VERB_MINIMAL 2
Willy Tarreau12ae2122019-08-08 18:23:12 +0200375 { .name="minimal", .desc="report only h2c/h2s state and flags, no real decoding" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200376#define H2_VERB_SIMPLE 3
Willy Tarreau12ae2122019-08-08 18:23:12 +0200377 { .name="simple", .desc="add request/response status line or frame info when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200378#define H2_VERB_ADVANCED 4
Willy Tarreau12ae2122019-08-08 18:23:12 +0200379 { .name="advanced", .desc="add header fields or frame decoding when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200380#define H2_VERB_COMPLETE 5
Willy Tarreau12ae2122019-08-08 18:23:12 +0200381 { .name="complete", .desc="add full data dump when available" },
382 { /* end */ }
383};
384
Willy Tarreau6eb3d372021-04-10 19:29:26 +0200385static struct trace_source trace_h2 __read_mostly = {
Willy Tarreau12ae2122019-08-08 18:23:12 +0200386 .name = IST("h2"),
387 .desc = "HTTP/2 multiplexer",
388 .arg_def = TRC_ARG1_CONN, // TRACE()'s first argument is always a connection
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200389 .default_cb = h2_trace,
Willy Tarreau12ae2122019-08-08 18:23:12 +0200390 .known_events = h2_trace_events,
391 .lockon_args = h2_trace_lockon_args,
392 .decoding = h2_trace_decoding,
393 .report_events = ~0, // report everything by default
394};
395
396#define TRACE_SOURCE &trace_h2
397INITCALL1(STG_REGISTER, trace_register_source, TRACE_SOURCE);
398
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100399/* h2 stats module */
400enum {
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100401 H2_ST_HEADERS_RCVD,
402 H2_ST_DATA_RCVD,
403 H2_ST_SETTINGS_RCVD,
404 H2_ST_RST_STREAM_RCVD,
405 H2_ST_GOAWAY_RCVD,
406
Amaury Denoyellea8879232020-10-27 17:16:03 +0100407 H2_ST_CONN_PROTO_ERR,
408 H2_ST_STRM_PROTO_ERR,
409 H2_ST_RST_STREAM_RESP,
410 H2_ST_GOAWAY_RESP,
411
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100412 H2_ST_OPEN_CONN,
413 H2_ST_OPEN_STREAM,
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100414 H2_ST_TOTAL_CONN,
415 H2_ST_TOTAL_STREAM,
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100416
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100417 H2_STATS_COUNT /* must be the last member of the enum */
418};
419
420static struct name_desc h2_stats[] = {
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100421 [H2_ST_HEADERS_RCVD] = { .name = "h2_headers_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100422 .desc = "Total number of received HEADERS frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100423 [H2_ST_DATA_RCVD] = { .name = "h2_data_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100424 .desc = "Total number of received DATA frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100425 [H2_ST_SETTINGS_RCVD] = { .name = "h2_settings_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100426 .desc = "Total number of received SETTINGS frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100427 [H2_ST_RST_STREAM_RCVD] = { .name = "h2_rst_stream_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100428 .desc = "Total number of received RST_STREAM frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100429 [H2_ST_GOAWAY_RCVD] = { .name = "h2_goaway_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100430 .desc = "Total number of received GOAWAY frames" },
Amaury Denoyellea8879232020-10-27 17:16:03 +0100431
432 [H2_ST_CONN_PROTO_ERR] = { .name = "h2_detected_conn_protocol_errors",
433 .desc = "Total number of connection protocol errors" },
434 [H2_ST_STRM_PROTO_ERR] = { .name = "h2_detected_strm_protocol_errors",
435 .desc = "Total number of stream protocol errors" },
436 [H2_ST_RST_STREAM_RESP] = { .name = "h2_rst_stream_resp",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100437 .desc = "Total number of RST_STREAM sent on detected error" },
Amaury Denoyellea8879232020-10-27 17:16:03 +0100438 [H2_ST_GOAWAY_RESP] = { .name = "h2_goaway_resp",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100439 .desc = "Total number of GOAWAY sent on detected error" },
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100440
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100441 [H2_ST_OPEN_CONN] = { .name = "h2_open_connections",
442 .desc = "Count of currently open connections" },
443 [H2_ST_OPEN_STREAM] = { .name = "h2_backend_open_streams",
444 .desc = "Count of currently open streams" },
Amaury Denoyelle377d8782021-02-03 16:27:22 +0100445 [H2_ST_TOTAL_CONN] = { .name = "h2_total_connections",
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100446 .desc = "Total number of connections" },
Amaury Denoyelle377d8782021-02-03 16:27:22 +0100447 [H2_ST_TOTAL_STREAM] = { .name = "h2_backend_total_streams",
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100448 .desc = "Total number of streams" },
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100449};
450
451static struct h2_counters {
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100452 long long headers_rcvd; /* total number of HEADERS frame received */
453 long long data_rcvd; /* total number of DATA frame received */
454 long long settings_rcvd; /* total number of SETTINGS frame received */
455 long long rst_stream_rcvd; /* total number of RST_STREAM frame received */
456 long long goaway_rcvd; /* total number of GOAWAY frame received */
Amaury Denoyellea8879232020-10-27 17:16:03 +0100457
458 long long conn_proto_err; /* total number of protocol errors detected */
459 long long strm_proto_err; /* total number of protocol errors detected */
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100460 long long rst_stream_resp; /* total number of RST_STREAM frame sent on error */
461 long long goaway_resp; /* total number of GOAWAY frame sent on error */
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100462
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100463 long long open_conns; /* count of currently open connections */
464 long long open_streams; /* count of currently open streams */
465 long long total_conns; /* total number of connections */
466 long long total_streams; /* total number of streams */
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100467} h2_counters;
468
469static void h2_fill_stats(void *data, struct field *stats)
470{
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100471 struct h2_counters *counters = data;
472
473 stats[H2_ST_HEADERS_RCVD] = mkf_u64(FN_COUNTER, counters->headers_rcvd);
474 stats[H2_ST_DATA_RCVD] = mkf_u64(FN_COUNTER, counters->data_rcvd);
475 stats[H2_ST_SETTINGS_RCVD] = mkf_u64(FN_COUNTER, counters->settings_rcvd);
476 stats[H2_ST_RST_STREAM_RCVD] = mkf_u64(FN_COUNTER, counters->rst_stream_rcvd);
477 stats[H2_ST_GOAWAY_RCVD] = mkf_u64(FN_COUNTER, counters->goaway_rcvd);
Amaury Denoyellea8879232020-10-27 17:16:03 +0100478
479 stats[H2_ST_CONN_PROTO_ERR] = mkf_u64(FN_COUNTER, counters->conn_proto_err);
480 stats[H2_ST_STRM_PROTO_ERR] = mkf_u64(FN_COUNTER, counters->strm_proto_err);
481 stats[H2_ST_RST_STREAM_RESP] = mkf_u64(FN_COUNTER, counters->rst_stream_resp);
482 stats[H2_ST_GOAWAY_RESP] = mkf_u64(FN_COUNTER, counters->goaway_resp);
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100483
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100484 stats[H2_ST_OPEN_CONN] = mkf_u64(FN_GAUGE, counters->open_conns);
485 stats[H2_ST_OPEN_STREAM] = mkf_u64(FN_GAUGE, counters->open_streams);
486 stats[H2_ST_TOTAL_CONN] = mkf_u64(FN_COUNTER, counters->total_conns);
487 stats[H2_ST_TOTAL_STREAM] = mkf_u64(FN_COUNTER, counters->total_streams);
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100488}
489
490static struct stats_module h2_stats_module = {
491 .name = "h2",
492 .fill_stats = h2_fill_stats,
493 .stats = h2_stats,
494 .stats_count = H2_STATS_COUNT,
495 .counters = &h2_counters,
496 .counters_size = sizeof(h2_counters),
497 .domain_flags = MK_STATS_PROXY_DOMAIN(STATS_PX_CAP_FE|STATS_PX_CAP_BE),
498 .clearable = 1,
499};
500
501INITCALL1(STG_REGISTER, stats_register_module, &h2_stats_module);
502
Willy Tarreau8ceae722018-11-26 11:58:30 +0100503/* the h2c connection pool */
504DECLARE_STATIC_POOL(pool_head_h2c, "h2c", sizeof(struct h2c));
505
506/* the h2s stream pool */
507DECLARE_STATIC_POOL(pool_head_h2s, "h2s", sizeof(struct h2s));
508
Willy Tarreaudc572362018-12-12 08:08:05 +0100509/* The default connection window size is 65535, it may only be enlarged using
510 * a WINDOW_UPDATE message. Since the window must never be larger than 2G-1,
511 * we'll pretend we already received the difference between the two to send
512 * an equivalent window update to enlarge it to 2G-1.
513 */
514#define H2_INITIAL_WINDOW_INCREMENT ((1U<<31)-1 - 65535)
515
Willy Tarreau455d5682019-05-24 19:42:18 +0200516/* maximum amount of data we're OK with re-aligning for buffer optimizations */
517#define MAX_DATA_REALIGN 1024
518
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200519/* a few settings from the global section */
520static int h2_settings_header_table_size = 4096; /* initial value */
Willy Tarreaue6baec02017-07-27 11:45:11 +0200521static int h2_settings_initial_window_size = 65535; /* initial value */
Willy Tarreau5a490b62019-01-31 10:39:51 +0100522static unsigned int h2_settings_max_concurrent_streams = 100;
Willy Tarreaua24b35c2019-02-21 13:24:36 +0100523static int h2_settings_max_frame_size = 0; /* unset */
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200524
Willy Tarreau2a856182017-05-16 15:20:39 +0200525/* a dmumy closed stream */
526static const struct h2s *h2_closed_stream = &(const struct h2s){
527 .cs = NULL,
528 .h2c = NULL,
529 .st = H2_SS_CLOSED,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100530 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreauab837502017-12-27 15:07:30 +0100531 .flags = H2_SF_RST_RCVD,
Willy Tarreau2a856182017-05-16 15:20:39 +0200532 .id = 0,
533};
534
Willy Tarreauecb9dcd2019-01-03 12:00:17 +0100535/* a dmumy closed stream returning a PROTOCOL_ERROR error */
536static const struct h2s *h2_error_stream = &(const struct h2s){
537 .cs = NULL,
538 .h2c = NULL,
539 .st = H2_SS_CLOSED,
540 .errcode = H2_ERR_PROTOCOL_ERROR,
541 .flags = 0,
542 .id = 0,
543};
544
Willy Tarreau8d0d58b2018-12-23 18:29:12 +0100545/* a dmumy closed stream returning a REFUSED_STREAM error */
546static const struct h2s *h2_refused_stream = &(const struct h2s){
547 .cs = NULL,
548 .h2c = NULL,
549 .st = H2_SS_CLOSED,
550 .errcode = H2_ERR_REFUSED_STREAM,
551 .flags = 0,
552 .id = 0,
553};
554
Willy Tarreau2a856182017-05-16 15:20:39 +0200555/* and a dummy idle stream for use with any unannounced stream */
556static const struct h2s *h2_idle_stream = &(const struct h2s){
557 .cs = NULL,
558 .h2c = NULL,
559 .st = H2_SS_IDLE,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100560 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreau2a856182017-05-16 15:20:39 +0200561 .id = 0,
562};
563
Willy Tarreau144f84a2021-03-02 16:09:26 +0100564struct task *h2_timeout_task(struct task *t, void *context, unsigned int state);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +0200565static int h2_send(struct h2c *h2c);
566static int h2_recv(struct h2c *h2c);
Olivier Houchard7505f942018-08-21 18:10:44 +0200567static int h2_process(struct h2c *h2c);
Willy Tarreau691d5032021-01-20 14:55:01 +0100568/* h2_io_cb is exported to see it resolved in "show fd" */
Willy Tarreau144f84a2021-03-02 16:09:26 +0100569struct task *h2_io_cb(struct task *t, void *ctx, unsigned int state);
Willy Tarreau0b559072018-02-26 15:22:17 +0100570static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id);
Amaury Denoyelle74162742020-12-11 17:53:05 +0100571static 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 +0100572static int h2_frt_transfer_data(struct h2s *h2s);
Willy Tarreau144f84a2021-03-02 16:09:26 +0100573struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned int state);
Olivier Houchardf502aca2018-12-14 19:42:40 +0100574static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess);
Willy Tarreau8b2757c2018-12-19 17:36:48 +0100575static void h2s_alert(struct h2s *h2s);
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200576
Willy Tarreauab2ec452019-08-30 07:07:08 +0200577/* returns a h2c state as an abbreviated 3-letter string, or "???" if unknown */
578static inline const char *h2c_st_to_str(enum h2_cs st)
579{
580 switch (st) {
581 case H2_CS_PREFACE: return "PRF";
582 case H2_CS_SETTINGS1: return "STG";
583 case H2_CS_FRAME_H: return "FRH";
584 case H2_CS_FRAME_P: return "FRP";
585 case H2_CS_FRAME_A: return "FRA";
586 case H2_CS_FRAME_E: return "FRE";
587 case H2_CS_ERROR: return "ERR";
588 case H2_CS_ERROR2: return "ER2";
589 default: return "???";
590 }
591}
592
593/* returns a h2s state as an abbreviated 3-letter string, or "???" if unknown */
594static inline const char *h2s_st_to_str(enum h2_ss st)
595{
596 switch (st) {
597 case H2_SS_IDLE: return "IDL"; // idle
598 case H2_SS_RLOC: return "RSL"; // reserved local
599 case H2_SS_RREM: return "RSR"; // reserved remote
600 case H2_SS_OPEN: return "OPN"; // open
601 case H2_SS_HREM: return "HCR"; // half-closed remote
602 case H2_SS_HLOC: return "HCL"; // half-closed local
603 case H2_SS_ERROR : return "ERR"; // error
604 case H2_SS_CLOSED: return "CLO"; // closed
605 default: return "???";
606 }
607}
608
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200609/* the H2 traces always expect that arg1, if non-null, is of type connection
610 * (from which we can derive h2c), that arg2, if non-null, is of type h2s, and
611 * that arg3, if non-null, is either of type htx for tx headers, or of type
612 * buffer for everything else.
613 */
614static void h2_trace(enum trace_level level, uint64_t mask, const struct trace_source *src,
615 const struct ist where, const struct ist func,
616 const void *a1, const void *a2, const void *a3, const void *a4)
617{
618 const struct connection *conn = a1;
619 const struct h2c *h2c = conn ? conn->ctx : NULL;
620 const struct h2s *h2s = a2;
621 const struct buffer *buf = a3;
622 const struct htx *htx;
623 int pos;
624
625 if (!h2c) // nothing to add
626 return;
627
Willy Tarreau17104d42019-08-30 07:12:55 +0200628 if (src->verbosity > H2_VERB_CLEAN) {
Willy Tarreau73db4342019-09-25 07:28:44 +0200629 chunk_appendf(&trace_buf, " : h2c=%p(%c,%s)", h2c, conn_is_back(conn) ? 'B' : 'F', h2c_st_to_str(h2c->st0));
630
Willy Tarreaue2f68e92021-06-16 17:47:24 +0200631 if (mask & H2_EV_H2C_NEW) // inside h2_init, otherwise it's hard to match conn & h2c
632 conn_append_debug_info(&trace_buf, conn, " : ");
633
Willy Tarreauf3ce0412019-11-24 14:57:00 +0100634 if (h2c->errcode)
635 chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2c->errcode), h2c->errcode);
636
Willy Tarreau6c3eeca2022-08-18 11:19:57 +0200637 if (h2c->flags & H2_CF_DEM_IN_PROGRESS && // frame processing has started, type and length are valid
Willy Tarreau73db4342019-09-25 07:28:44 +0200638 (mask & (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) == (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) {
Willy Tarreau8520d872020-09-18 07:39:29 +0200639 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 +0200640 }
641
642 if (h2s) {
643 if (h2s->id <= 0)
644 chunk_appendf(&trace_buf, " dsi=%d", h2c->dsi);
645 chunk_appendf(&trace_buf, " h2s=%p(%d,%s)", h2s, h2s->id, h2s_st_to_str(h2s->st));
Willy Tarreauf3ce0412019-11-24 14:57:00 +0100646 if (h2s->id && h2s->errcode)
647 chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2s->errcode), h2s->errcode);
Willy Tarreau73db4342019-09-25 07:28:44 +0200648 }
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200649 }
650
651 /* Let's dump decoded requests and responses right after parsing. They
652 * are traced at level USER with a few recognizable flags.
653 */
654 if ((mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW) ||
655 mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR)) && buf)
656 htx = htxbuf(buf); // recv req/res
657 else if (mask == (H2_EV_TX_FRAME|H2_EV_TX_HDR))
658 htx = a3; // send req/res
659 else
660 htx = NULL;
661
Willy Tarreau94f1dcf2019-08-30 07:11:30 +0200662 if (level == TRACE_LEVEL_USER && src->verbosity != H2_VERB_MINIMAL && htx && (pos = htx_get_head(htx)) != -1) {
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200663 const struct htx_blk *blk = htx_get_blk(htx, pos);
664 const struct htx_sl *sl = htx_get_blk_ptr(htx, blk);
665 enum htx_blk_type type = htx_get_blk_type(blk);
666
667 if (type == HTX_BLK_REQ_SL)
668 chunk_appendf(&trace_buf, " : [%d] H2 REQ: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200669 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200670 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
671 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
672 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
673 else if (type == HTX_BLK_RES_SL)
674 chunk_appendf(&trace_buf, " : [%d] H2 RES: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200675 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200676 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
677 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
678 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
679 }
680}
681
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200682
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100683/* Detect a pending read0 for a H2 connection. It happens if a read0 was
684 * already reported on a previous xprt->rcvbuf() AND a frame parser failed
685 * to parse pending data, confirming no more progress is possible because
686 * we're facing a truncated frame. The function returns 1 to report a read0
687 * or 0 otherwise.
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200688 */
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100689static inline int h2c_read0_pending(struct h2c *h2c)
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200690{
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100691 return !!(h2c->flags & H2_CF_END_REACHED);
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200692}
693
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200694/* returns true if the connection is allowed to expire, false otherwise. A
Willy Tarreaud34d25a2022-03-18 14:59:54 +0100695 * connection may expire when it has no attached streams. As long as streams
696 * are attached, the application layer is responsible for timeout management,
697 * and each layer will detach when it doesn't want to wait anymore. When the
698 * last one leaves, the connection must take over timeout management.
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200699 */
700static inline int h2c_may_expire(const struct h2c *h2c)
701{
Willy Tarreaud34d25a2022-03-18 14:59:54 +0100702 return !h2c->nb_cs;
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200703}
704
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +0100705/* update h2c timeout if needed */
706static void h2c_update_timeout(struct h2c *h2c)
707{
708 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
709
710 if (!h2c->task)
711 goto leave;
712
713 if (h2c_may_expire(h2c)) {
714 /* no more streams attached */
715 if (h2c->last_sid >= 0) {
716 /* GOAWAY sent, closing in progress */
717 h2c->task->expire = tick_add_ifset(now_ms, h2c->shut_timeout);
718 } else if (br_data(h2c->mbuf)) {
719 /* pending output data: always the regular data timeout */
720 h2c->task->expire = tick_add_ifset(now_ms, h2c->timeout);
Willy Tarreau46f9bb42022-04-14 11:43:35 +0200721 } else if (!(h2c->flags & H2_CF_IS_BACK) && h2c->max_id > 0 && !b_data(&h2c->dbuf)) {
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +0100722 /* idle after having seen one stream => keep-alive */
Willy Tarreau211fc0b2022-04-13 17:40:28 +0200723 int to;
724
725 if (tick_isset(h2c->proxy->timeout.httpka))
726 to = h2c->proxy->timeout.httpka;
727 else
728 to = h2c->proxy->timeout.httpreq;
729
730 h2c->task->expire = tick_add_ifset(h2c->idle_start, to);
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +0100731 } else {
732 /* before first request, or started to deserialize a
733 * new req => http-request, but only set, not refresh.
734 */
735 int exp = (h2c->flags & H2_CF_IS_BACK) ? TICK_ETERNITY : h2c->proxy->timeout.httpreq;
736 h2c->task->expire = tick_add_ifset(h2c->idle_start, exp);
737 }
738 /* if a timeout above was not set, fall back to the default one */
739 if (!tick_isset(h2c->task->expire))
740 h2c->task->expire = tick_add_ifset(now_ms, h2c->timeout);
741 } else {
742 h2c->task->expire = TICK_ETERNITY;
743 }
744 task_queue(h2c->task);
745 leave:
746 TRACE_LEAVE(H2_EV_H2C_WAKE);
747}
748
Olivier Houchard7a977432019-03-21 15:47:13 +0100749static __inline int
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200750h2c_is_dead(const struct h2c *h2c)
Olivier Houchard7a977432019-03-21 15:47:13 +0100751{
752 if (eb_is_empty(&h2c->streams_by_id) && /* don't close if streams exist */
753 ((h2c->conn->flags & CO_FL_ERROR) || /* errors close immediately */
754 (h2c->st0 >= H2_CS_ERROR && !h2c->task) || /* a timeout stroke earlier */
755 (!(h2c->conn->owner)) || /* Nobody's left to take care of the connection, drop it now */
Willy Tarreau662fafc2019-05-26 09:43:07 +0200756 (!br_data(h2c->mbuf) && /* mux buffer empty, also process clean events below */
Olivier Houchard7a977432019-03-21 15:47:13 +0100757 (conn_xprt_read0_pending(h2c->conn) ||
758 (h2c->last_sid >= 0 && h2c->max_id >= h2c->last_sid)))))
759 return 1;
760
761 return 0;
Olivier Houchard7a977432019-03-21 15:47:13 +0100762}
763
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200764/*****************************************************/
765/* functions below are for dynamic buffer management */
766/*****************************************************/
767
Willy Tarreau315d8072017-12-10 22:17:57 +0100768/* indicates whether or not the we may call the h2_recv() function to attempt
769 * to receive data into the buffer and/or demux pending data. The condition is
770 * a bit complex due to some API limits for now. The rules are the following :
771 * - if an error or a shutdown was detected on the connection and the buffer
772 * is empty, we must not attempt to receive
773 * - if the demux buf failed to be allocated, we must not try to receive and
774 * we know there is nothing pending
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100775 * - if no flag indicates a blocking condition, we may attempt to receive,
776 * regardless of whether the demux buffer is full or not, so that only
777 * de demux part decides whether or not to block. This is needed because
778 * the connection API indeed prevents us from re-enabling receipt that is
779 * already enabled in a polled state, so we must always immediately stop
780 * as soon as the demux can't proceed so as never to hit an end of read
781 * with data pending in the buffers.
Willy Tarreau315d8072017-12-10 22:17:57 +0100782 * - otherwise must may not attempt
783 */
784static inline int h2_recv_allowed(const struct h2c *h2c)
785{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200786 if (b_data(&h2c->dbuf) == 0 &&
Willy Tarreau315d8072017-12-10 22:17:57 +0100787 (h2c->st0 >= H2_CS_ERROR ||
788 h2c->conn->flags & CO_FL_ERROR ||
789 conn_xprt_read0_pending(h2c->conn)))
790 return 0;
791
792 if (!(h2c->flags & H2_CF_DEM_DALLOC) &&
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100793 !(h2c->flags & H2_CF_DEM_BLOCK_ANY))
Willy Tarreau315d8072017-12-10 22:17:57 +0100794 return 1;
795
796 return 0;
797}
798
Willy Tarreau47b515a2018-12-21 16:09:41 +0100799/* restarts reading on the connection if it was not enabled */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200800static inline void h2c_restart_reading(const struct h2c *h2c, int consider_buffer)
Willy Tarreau47b515a2018-12-21 16:09:41 +0100801{
802 if (!h2_recv_allowed(h2c))
803 return;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200804 if ((!consider_buffer || !b_data(&h2c->dbuf))
805 && (h2c->wait_event.events & SUB_RETRY_RECV))
Willy Tarreau47b515a2018-12-21 16:09:41 +0100806 return;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200807 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau47b515a2018-12-21 16:09:41 +0100808}
809
810
Willy Tarreaufa1d3572019-01-31 10:31:51 +0100811/* returns true if the front connection has too many conn_streams attached */
812static inline int h2_frt_has_too_many_cs(const struct h2c *h2c)
Willy Tarreauf2101912018-07-19 10:11:38 +0200813{
Willy Tarreaua8754662018-12-23 20:43:58 +0100814 return h2c->nb_cs > h2_settings_max_concurrent_streams;
Willy Tarreauf2101912018-07-19 10:11:38 +0200815}
816
Willy Tarreau44e973f2018-03-01 17:49:30 +0100817/* Tries to grab a buffer and to re-enable processing on mux <target>. The h2c
818 * flags are used to figure what buffer was requested. It returns 1 if the
819 * allocation succeeds, in which case the connection is woken up, or 0 if it's
820 * impossible to wake up and we prefer to be woken up later.
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200821 */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100822static int h2_buf_available(void *target)
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200823{
824 struct h2c *h2c = target;
Willy Tarreau0b559072018-02-26 15:22:17 +0100825 struct h2s *h2s;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200826
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100827 if ((h2c->flags & H2_CF_DEM_DALLOC) && b_alloc(&h2c->dbuf)) {
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200828 h2c->flags &= ~H2_CF_DEM_DALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200829 h2c_restart_reading(h2c, 1);
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200830 return 1;
831 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200832
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100833 if ((h2c->flags & H2_CF_MUX_MALLOC) && b_alloc(br_tail(h2c->mbuf))) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100834 h2c->flags &= ~H2_CF_MUX_MALLOC;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200835
836 if (h2c->flags & H2_CF_DEM_MROOM) {
837 h2c->flags &= ~H2_CF_DEM_MROOM;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200838 h2c_restart_reading(h2c, 1);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200839 }
Willy Tarreau14398122017-09-22 14:26:04 +0200840 return 1;
841 }
Willy Tarreau0b559072018-02-26 15:22:17 +0100842
843 if ((h2c->flags & H2_CF_DEM_SALLOC) &&
844 (h2s = h2c_st_by_id(h2c, h2c->dsi)) && h2s->cs &&
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100845 b_alloc(&h2s->rxbuf)) {
Willy Tarreau0b559072018-02-26 15:22:17 +0100846 h2c->flags &= ~H2_CF_DEM_SALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200847 h2c_restart_reading(h2c, 1);
Willy Tarreau0b559072018-02-26 15:22:17 +0100848 return 1;
849 }
850
Willy Tarreau14398122017-09-22 14:26:04 +0200851 return 0;
852}
853
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200854static inline struct buffer *h2_get_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200855{
856 struct buffer *buf = NULL;
857
Willy Tarreau2b718102021-04-21 07:32:39 +0200858 if (likely(!LIST_INLIST(&h2c->buf_wait.list)) &&
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100859 unlikely((buf = b_alloc(bptr)) == NULL)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100860 h2c->buf_wait.target = h2c;
861 h2c->buf_wait.wakeup_cb = h2_buf_available;
Willy Tarreau2b718102021-04-21 07:32:39 +0200862 LIST_APPEND(&ti->buffer_wq, &h2c->buf_wait.list);
Willy Tarreau14398122017-09-22 14:26:04 +0200863 }
864 return buf;
865}
866
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200867static inline void h2_release_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200868{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200869 if (bptr->size) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100870 b_free(bptr);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +0100871 offer_buffers(NULL, 1);
Willy Tarreau14398122017-09-22 14:26:04 +0200872 }
873}
874
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200875static inline void h2_release_mbuf(struct h2c *h2c)
876{
877 struct buffer *buf;
878 unsigned int count = 0;
879
880 while (b_size(buf = br_head_pick(h2c->mbuf))) {
881 b_free(buf);
882 count++;
883 }
884 if (count)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +0100885 offer_buffers(NULL, count);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200886}
887
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100888/* returns the number of allocatable outgoing streams for the connection taking
889 * the last_sid and the reserved ones into account.
890 */
891static inline int h2_streams_left(const struct h2c *h2c)
892{
893 int ret;
894
895 /* consider the number of outgoing streams we're allowed to create before
896 * reaching the last GOAWAY frame seen. max_id is the last assigned id,
897 * nb_reserved is the number of streams which don't yet have an ID.
898 */
899 ret = (h2c->last_sid >= 0) ? h2c->last_sid : 0x7FFFFFFF;
900 ret = (unsigned int)(ret - h2c->max_id) / 2 - h2c->nb_reserved - 1;
901 if (ret < 0)
902 ret = 0;
903 return ret;
904}
905
Willy Tarreau00f18a32019-01-26 12:19:01 +0100906/* returns the number of streams in use on a connection to figure if it's
907 * idle or not. We check nb_cs and not nb_streams as the caller will want
908 * to know if it was the last one after a detach().
909 */
910static int h2_used_streams(struct connection *conn)
911{
912 struct h2c *h2c = conn->ctx;
913
914 return h2c->nb_cs;
915}
916
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100917/* returns the number of concurrent streams available on the connection */
Olivier Houchardd540b362018-11-05 18:37:53 +0100918static int h2_avail_streams(struct connection *conn)
919{
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100920 struct server *srv = objt_server(conn->target);
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100921 struct h2c *h2c = conn->ctx;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100922 int ret1, ret2;
Olivier Houchardd540b362018-11-05 18:37:53 +0100923
Willy Tarreau6afec462019-01-28 06:40:19 +0100924 /* RFC7540#6.8: Receivers of a GOAWAY frame MUST NOT open additional
925 * streams on the connection.
926 */
927 if (h2c->last_sid >= 0)
928 return 0;
929
Willy Tarreauc61966f2019-10-31 15:10:03 +0100930 if (h2c->st0 >= H2_CS_ERROR)
931 return 0;
932
Willy Tarreau86949782019-01-31 10:42:05 +0100933 /* note: may be negative if a SETTINGS frame changes the limit */
934 ret1 = h2c->streams_limit - h2c->nb_streams;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100935
936 /* we must also consider the limit imposed by stream IDs */
937 ret2 = h2_streams_left(h2c);
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100938 ret1 = MIN(ret1, ret2);
Willy Tarreau86949782019-01-31 10:42:05 +0100939 if (ret1 > 0 && srv && srv->max_reuse >= 0) {
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100940 ret2 = h2c->stream_cnt <= srv->max_reuse ? srv->max_reuse - h2c->stream_cnt + 1: 0;
941 ret1 = MIN(ret1, ret2);
942 }
943 return ret1;
Olivier Houchardd540b362018-11-05 18:37:53 +0100944}
945
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200946
Willy Tarreau62f52692017-10-08 23:01:42 +0200947/*****************************************************************/
948/* functions below are dedicated to the mux setup and management */
949/*****************************************************************/
950
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200951/* Initialize the mux once it's attached. For outgoing connections, the context
952 * is already initialized before installing the mux, so we detect incoming
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200953 * connections from the fact that the context is still NULL (even during mux
954 * upgrades). <input> is always used as Input buffer and may contain data. It is
955 * the caller responsibility to not reuse it anymore. Returns < 0 on error.
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200956 */
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200957static int h2_init(struct connection *conn, struct proxy *prx, struct session *sess,
958 struct buffer *input)
Willy Tarreau32218eb2017-09-22 08:07:25 +0200959{
960 struct h2c *h2c;
Willy Tarreauea392822017-10-31 10:02:25 +0100961 struct task *t = NULL;
Christopher Fauletf81ef032019-10-04 15:19:43 +0200962 void *conn_ctx = conn->ctx;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200963
Christopher Fauletf81ef032019-10-04 15:19:43 +0200964 TRACE_ENTER(H2_EV_H2C_NEW);
Willy Tarreau7838a792019-08-12 18:42:03 +0200965
Willy Tarreaubafbe012017-11-24 17:34:44 +0100966 h2c = pool_alloc(pool_head_h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200967 if (!h2c)
mildiscd2d7de2018-10-02 16:44:18 +0200968 goto fail_no_h2c;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200969
Christopher Faulete9b70722019-04-08 10:46:02 +0200970 if (conn_is_back(conn)) {
Willy Tarreau01b44822018-10-03 14:26:37 +0200971 h2c->flags = H2_CF_IS_BACK;
972 h2c->shut_timeout = h2c->timeout = prx->timeout.server;
973 if (tick_isset(prx->timeout.serverfin))
974 h2c->shut_timeout = prx->timeout.serverfin;
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100975
976 h2c->px_counters = EXTRA_COUNTERS_GET(prx->extra_counters_be,
977 &h2_stats_module);
Willy Tarreau01b44822018-10-03 14:26:37 +0200978 } else {
979 h2c->flags = H2_CF_NONE;
980 h2c->shut_timeout = h2c->timeout = prx->timeout.client;
981 if (tick_isset(prx->timeout.clientfin))
982 h2c->shut_timeout = prx->timeout.clientfin;
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100983
984 h2c->px_counters = EXTRA_COUNTERS_GET(prx->extra_counters_fe,
985 &h2_stats_module);
Willy Tarreau01b44822018-10-03 14:26:37 +0200986 }
Willy Tarreau3f133572017-10-31 19:21:06 +0100987
Willy Tarreau0b37d652018-10-03 10:33:02 +0200988 h2c->proxy = prx;
Willy Tarreau33400292017-11-05 11:23:40 +0100989 h2c->task = NULL;
Willy Tarreau4c8241a2023-03-20 19:16:04 +0100990 h2c->wait_event.tasklet = NULL;
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +0100991 h2c->idle_start = now_ms;
Willy Tarreau3f133572017-10-31 19:21:06 +0100992 if (tick_isset(h2c->timeout)) {
993 t = task_new(tid_bit);
994 if (!t)
995 goto fail;
996
997 h2c->task = t;
998 t->process = h2_timeout_task;
999 t->context = h2c;
1000 t->expire = tick_add(now_ms, h2c->timeout);
1001 }
Willy Tarreauea392822017-10-31 10:02:25 +01001002
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001003 h2c->wait_event.tasklet = tasklet_new();
1004 if (!h2c->wait_event.tasklet)
Olivier Houchard910b2bc2018-07-17 18:49:38 +02001005 goto fail;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001006 h2c->wait_event.tasklet->process = h2_io_cb;
1007 h2c->wait_event.tasklet->context = h2c;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001008 h2c->wait_event.events = 0;
Amaury Denoyelled3a88c12021-05-03 10:47:51 +02001009 if (!conn_is_back(conn)) {
1010 /* Connection might already be in the stopping_list if subject
1011 * to h1->h2 upgrade.
1012 */
1013 if (!LIST_INLIST(&conn->stopping_list)) {
1014 LIST_APPEND(&mux_stopping_data[tid].list,
1015 &conn->stopping_list);
1016 }
1017 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02001018
Willy Tarreau2bdcc702020-05-19 11:31:11 +02001019 h2c->ddht = hpack_dht_alloc();
Willy Tarreau32218eb2017-09-22 08:07:25 +02001020 if (!h2c->ddht)
1021 goto fail;
1022
1023 /* Initialise the context. */
1024 h2c->st0 = H2_CS_PREFACE;
1025 h2c->conn = conn;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01001026 h2c->streams_limit = h2_settings_max_concurrent_streams;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001027 h2c->max_id = -1;
1028 h2c->errcode = H2_ERR_NO_ERROR;
Willy Tarreau97aaa672018-12-23 09:49:04 +01001029 h2c->rcvd_c = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001030 h2c->rcvd_s = 0;
Willy Tarreau49745612017-12-03 18:56:02 +01001031 h2c->nb_streams = 0;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001032 h2c->nb_cs = 0;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001033 h2c->nb_reserved = 0;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001034 h2c->stream_cnt = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001035
Christopher Faulet51f73eb2019-04-08 11:22:47 +02001036 h2c->dbuf = *input;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001037 h2c->dsi = -1;
1038 h2c->msi = -1;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001039
Willy Tarreau32218eb2017-09-22 08:07:25 +02001040 h2c->last_sid = -1;
1041
Willy Tarreau51330962019-05-26 09:38:07 +02001042 br_init(h2c->mbuf, sizeof(h2c->mbuf) / sizeof(h2c->mbuf[0]));
Willy Tarreau32218eb2017-09-22 08:07:25 +02001043 h2c->miw = 65535; /* mux initial window size */
1044 h2c->mws = 65535; /* mux window size */
1045 h2c->mfs = 16384; /* initial max frame size */
Willy Tarreau751f2d02018-10-05 09:35:00 +02001046 h2c->streams_by_id = EB_ROOT;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001047 LIST_INIT(&h2c->send_list);
1048 LIST_INIT(&h2c->fctl_list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +02001049 LIST_INIT(&h2c->blocked_list);
Willy Tarreau90f366b2021-02-20 11:49:49 +01001050 LIST_INIT(&h2c->buf_wait.list);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001051
Christopher Fauletf81ef032019-10-04 15:19:43 +02001052 conn->ctx = h2c;
1053
Willy Tarreaue2f68e92021-06-16 17:47:24 +02001054 TRACE_USER("new H2 connection", H2_EV_H2C_NEW, conn);
1055
Willy Tarreau3f133572017-10-31 19:21:06 +01001056 if (t)
1057 task_queue(t);
Willy Tarreauea392822017-10-31 10:02:25 +01001058
Willy Tarreau01b44822018-10-03 14:26:37 +02001059 if (h2c->flags & H2_CF_IS_BACK) {
1060 /* FIXME: this is temporary, for outgoing connections we need
1061 * to immediately allocate a stream until the code is modified
1062 * so that the caller calls ->attach(). For now the outgoing cs
Christopher Fauletf81ef032019-10-04 15:19:43 +02001063 * is stored as conn->ctx by the caller and saved in conn_ctx.
Willy Tarreau01b44822018-10-03 14:26:37 +02001064 */
1065 struct h2s *h2s;
1066
Christopher Fauletf81ef032019-10-04 15:19:43 +02001067 h2s = h2c_bck_stream_new(h2c, conn_ctx, sess);
Willy Tarreau01b44822018-10-03 14:26:37 +02001068 if (!h2s)
1069 goto fail_stream;
1070 }
1071
Willy Tarreau4781b152021-04-06 13:53:36 +02001072 HA_ATOMIC_INC(&h2c->px_counters->open_conns);
1073 HA_ATOMIC_INC(&h2c->px_counters->total_conns);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001074
Willy Tarreau0f383582018-10-03 14:22:21 +02001075 /* prepare to read something */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02001076 h2c_restart_reading(h2c, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001077 TRACE_LEAVE(H2_EV_H2C_NEW, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001078 return 0;
Willy Tarreau01b44822018-10-03 14:26:37 +02001079 fail_stream:
1080 hpack_dht_free(h2c->ddht);
mildiscd2d7de2018-10-02 16:44:18 +02001081 fail:
Willy Tarreauf6562792019-05-07 19:05:35 +02001082 task_destroy(t);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001083 if (h2c->wait_event.tasklet)
1084 tasklet_free(h2c->wait_event.tasklet);
Willy Tarreaubafbe012017-11-24 17:34:44 +01001085 pool_free(pool_head_h2c, h2c);
mildiscd2d7de2018-10-02 16:44:18 +02001086 fail_no_h2c:
Willy Tarreau8802bf12022-01-12 17:24:26 +01001087 if (!conn_is_back(conn))
1088 LIST_DEL_INIT(&conn->stopping_list);
Christopher Fauletf81ef032019-10-04 15:19:43 +02001089 conn->ctx = conn_ctx; /* restore saved ctx */
1090 TRACE_DEVEL("leaving in error", H2_EV_H2C_NEW|H2_EV_H2C_END|H2_EV_H2C_ERR);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001091 return -1;
1092}
1093
Willy Tarreau751f2d02018-10-05 09:35:00 +02001094/* returns the next allocatable outgoing stream ID for the H2 connection, or
1095 * -1 if no more is allocatable.
1096 */
1097static inline int32_t h2c_get_next_sid(const struct h2c *h2c)
1098{
1099 int32_t id = (h2c->max_id + 1) | 1;
Willy Tarreaua80dca82019-01-24 17:08:28 +01001100
1101 if ((id & 0x80000000U) || (h2c->last_sid >= 0 && id > h2c->last_sid))
Willy Tarreau751f2d02018-10-05 09:35:00 +02001102 id = -1;
1103 return id;
1104}
1105
Willy Tarreau2373acc2017-10-12 17:35:14 +02001106/* returns the stream associated with id <id> or NULL if not found */
1107static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id)
1108{
1109 struct eb32_node *node;
1110
Willy Tarreau751f2d02018-10-05 09:35:00 +02001111 if (id == 0)
1112 return (struct h2s *)h2_closed_stream;
1113
Willy Tarreau2a856182017-05-16 15:20:39 +02001114 if (id > h2c->max_id)
1115 return (struct h2s *)h2_idle_stream;
1116
Willy Tarreau2373acc2017-10-12 17:35:14 +02001117 node = eb32_lookup(&h2c->streams_by_id, id);
1118 if (!node)
Willy Tarreau2a856182017-05-16 15:20:39 +02001119 return (struct h2s *)h2_closed_stream;
Willy Tarreau2373acc2017-10-12 17:35:14 +02001120
1121 return container_of(node, struct h2s, by_id);
1122}
1123
Christopher Faulet73c12072019-04-08 11:23:22 +02001124/* release function. This one should be called to free all resources allocated
1125 * to the mux.
Willy Tarreau62f52692017-10-08 23:01:42 +02001126 */
Christopher Faulet73c12072019-04-08 11:23:22 +02001127static void h2_release(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02001128{
William Dauchy477757c2020-08-07 22:19:23 +02001129 struct connection *conn = NULL;
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001130
Willy Tarreau7838a792019-08-12 18:42:03 +02001131 TRACE_ENTER(H2_EV_H2C_END);
1132
Willy Tarreau32218eb2017-09-22 08:07:25 +02001133 if (h2c) {
Christopher Faulet61840e72019-04-15 09:33:32 +02001134 /* The connection must be aattached to this mux to be released */
1135 if (h2c->conn && h2c->conn->ctx == h2c)
1136 conn = h2c->conn;
1137
Willy Tarreau7838a792019-08-12 18:42:03 +02001138 TRACE_DEVEL("freeing h2c", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001139 hpack_dht_free(h2c->ddht);
Willy Tarreau14398122017-09-22 14:26:04 +02001140
Willy Tarreau2b718102021-04-21 07:32:39 +02001141 if (LIST_INLIST(&h2c->buf_wait.list))
Willy Tarreau90f366b2021-02-20 11:49:49 +01001142 LIST_DEL_INIT(&h2c->buf_wait.list);
Willy Tarreau14398122017-09-22 14:26:04 +02001143
Willy Tarreau44e973f2018-03-01 17:49:30 +01001144 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau2e3c0002019-05-26 09:45:23 +02001145 h2_release_mbuf(h2c);
Willy Tarreau44e973f2018-03-01 17:49:30 +01001146
Willy Tarreauea392822017-10-31 10:02:25 +01001147 if (h2c->task) {
Willy Tarreau0975f112018-03-29 15:22:59 +02001148 h2c->task->context = NULL;
1149 task_wakeup(h2c->task, TASK_WOKEN_OTHER);
Willy Tarreauea392822017-10-31 10:02:25 +01001150 h2c->task = NULL;
1151 }
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001152 if (h2c->wait_event.tasklet)
1153 tasklet_free(h2c->wait_event.tasklet);
Christopher Faulet21d849f2019-09-18 11:07:20 +02001154 if (conn && h2c->wait_event.events != 0)
Olivier Houcharde179d0e2019-03-21 18:27:17 +01001155 conn->xprt->unsubscribe(conn, conn->xprt_ctx, h2c->wait_event.events,
Christopher Faulet21d849f2019-09-18 11:07:20 +02001156 &h2c->wait_event);
Willy Tarreauea392822017-10-31 10:02:25 +01001157
Willy Tarreau4781b152021-04-06 13:53:36 +02001158 HA_ATOMIC_DEC(&h2c->px_counters->open_conns);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001159
Willy Tarreaubafbe012017-11-24 17:34:44 +01001160 pool_free(pool_head_h2c, h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001161 }
1162
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001163 if (conn) {
Amaury Denoyelled3a88c12021-05-03 10:47:51 +02001164 if (!conn_is_back(conn))
1165 LIST_DEL_INIT(&conn->stopping_list);
1166
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001167 conn->mux = NULL;
1168 conn->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02001169 TRACE_DEVEL("freeing conn", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001170
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001171 conn_stop_tracking(conn);
Willy Tarreaudaa0e5f2021-10-21 22:24:31 +02001172
1173 /* there might be a GOAWAY frame still pending in the TCP
1174 * stack, and if the peer continues to send (i.e. window
1175 * updates etc), this can result in losing the GOAWAY. For
1176 * this reason we try to drain anything received in between.
1177 */
1178 conn->flags |= CO_FL_WANT_DRAIN;
1179
1180 conn_xprt_shutw(conn);
1181 conn_xprt_close(conn);
1182 conn_sock_shutw(conn, !conn_is_back(conn));
1183 conn_ctrl_close(conn);
1184
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001185 if (conn->destroy_cb)
1186 conn->destroy_cb(conn);
1187 conn_free(conn);
1188 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001189
1190 TRACE_LEAVE(H2_EV_H2C_END);
Willy Tarreau62f52692017-10-08 23:01:42 +02001191}
1192
1193
Willy Tarreau71681172017-10-23 14:39:06 +02001194/******************************************************/
1195/* functions below are for the H2 protocol processing */
1196/******************************************************/
1197
1198/* returns the stream if of stream <h2s> or 0 if <h2s> is NULL */
Willy Tarreau1f094672017-11-20 21:27:45 +01001199static inline __maybe_unused int h2s_id(const struct h2s *h2s)
Willy Tarreau71681172017-10-23 14:39:06 +02001200{
1201 return h2s ? h2s->id : 0;
1202}
1203
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001204/* returns the sum of the stream's own window size and the mux's initial
1205 * window, which together form the stream's effective window size.
1206 */
1207static inline int h2s_mws(const struct h2s *h2s)
1208{
1209 return h2s->sws + h2s->h2c->miw;
1210}
1211
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001212/* returns true of the mux is currently busy as seen from stream <h2s> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001213static inline __maybe_unused int h2c_mux_busy(const struct h2c *h2c, const struct h2s *h2s)
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001214{
1215 if (h2c->msi < 0)
1216 return 0;
1217
1218 if (h2c->msi == h2s_id(h2s))
1219 return 0;
1220
1221 return 1;
1222}
1223
Willy Tarreauec26f622022-04-13 09:40:52 +02001224/* marks an error on the connection. Before settings are sent, we must not send
1225 * a GOAWAY frame, and the error state will prevent h2c_send_goaway_error()
1226 * from verifying this so we set H2_CF_GOAWAY_FAILED to make sure it will not
1227 * even try.
1228 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001229static inline __maybe_unused void h2c_error(struct h2c *h2c, enum h2_err err)
Willy Tarreau741d6df2017-10-17 08:00:59 +02001230{
Willy Tarreau022e5e52020-09-10 09:33:15 +02001231 TRACE_POINT(H2_EV_H2C_ERR, h2c->conn, 0, 0, (void *)(long)(err));
Willy Tarreau741d6df2017-10-17 08:00:59 +02001232 h2c->errcode = err;
Willy Tarreauec26f622022-04-13 09:40:52 +02001233 if (h2c->st0 < H2_CS_SETTINGS1)
1234 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau741d6df2017-10-17 08:00:59 +02001235 h2c->st0 = H2_CS_ERROR;
1236}
1237
Willy Tarreau175cebb2019-01-24 10:02:24 +01001238/* marks an error on the stream. It may also update an already closed stream
1239 * (e.g. to report an error after an RST was received).
1240 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001241static inline __maybe_unused void h2s_error(struct h2s *h2s, enum h2_err err)
Willy Tarreau2e43f082017-10-17 08:03:59 +02001242{
Willy Tarreau175cebb2019-01-24 10:02:24 +01001243 if (h2s->id && h2s->st != H2_SS_ERROR) {
Willy Tarreau022e5e52020-09-10 09:33:15 +02001244 TRACE_POINT(H2_EV_H2S_ERR, h2s->h2c->conn, h2s, 0, (void *)(long)(err));
Willy Tarreau2e43f082017-10-17 08:03:59 +02001245 h2s->errcode = err;
Willy Tarreau175cebb2019-01-24 10:02:24 +01001246 if (h2s->st < H2_SS_ERROR)
1247 h2s->st = H2_SS_ERROR;
Willy Tarreauec988c72018-12-19 18:00:29 +01001248 if (h2s->cs)
1249 cs_set_error(h2s->cs);
Willy Tarreau2e43f082017-10-17 08:03:59 +02001250 }
1251}
1252
Willy Tarreau7e094452018-12-19 18:08:52 +01001253/* attempt to notify the data layer of recv availability */
1254static void __maybe_unused h2s_notify_recv(struct h2s *h2s)
1255{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001256 if (h2s->subs && h2s->subs->events & SUB_RETRY_RECV) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001257 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01001258 tasklet_wakeup(h2s->subs->tasklet);
1259 h2s->subs->events &= ~SUB_RETRY_RECV;
1260 if (!h2s->subs->events)
1261 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001262 }
1263}
1264
1265/* attempt to notify the data layer of send availability */
1266static void __maybe_unused h2s_notify_send(struct h2s *h2s)
1267{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001268 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001269 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01001270 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01001271 tasklet_wakeup(h2s->subs->tasklet);
1272 h2s->subs->events &= ~SUB_RETRY_SEND;
1273 if (!h2s->subs->events)
1274 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001275 }
Willy Tarreau5723f292020-01-10 15:16:57 +01001276 else if (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) {
1277 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
1278 tasklet_wakeup(h2s->shut_tl);
1279 }
Willy Tarreau7e094452018-12-19 18:08:52 +01001280}
1281
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001282/* alerts the data layer, trying to wake it up by all means, following
1283 * this sequence :
1284 * - if the h2s' data layer is subscribed to recv, then it's woken up for recv
1285 * - if its subscribed to send, then it's woken up for send
1286 * - if it was subscribed to neither, its ->wake() callback is called
1287 * It is safe to call this function with a closed stream which doesn't have a
1288 * conn_stream anymore.
1289 */
1290static void __maybe_unused h2s_alert(struct h2s *h2s)
1291{
Willy Tarreau7838a792019-08-12 18:42:03 +02001292 TRACE_ENTER(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
1293
Willy Tarreauf96508a2020-01-10 11:12:48 +01001294 if (h2s->subs ||
Willy Tarreau5723f292020-01-10 15:16:57 +01001295 (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW))) {
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001296 h2s_notify_recv(h2s);
1297 h2s_notify_send(h2s);
1298 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001299 else if (h2s->cs && h2s->cs->data_cb->wake != NULL) {
1300 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001301 h2s->cs->data_cb->wake(h2s->cs);
Willy Tarreau7838a792019-08-12 18:42:03 +02001302 }
1303
1304 TRACE_LEAVE(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001305}
1306
Willy Tarreaue4820742017-07-27 13:37:23 +02001307/* writes the 24-bit frame size <len> at address <frame> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001308static inline __maybe_unused void h2_set_frame_size(void *frame, uint32_t len)
Willy Tarreaue4820742017-07-27 13:37:23 +02001309{
1310 uint8_t *out = frame;
1311
1312 *out = len >> 16;
1313 write_n16(out + 1, len);
1314}
1315
Willy Tarreau54c15062017-10-10 17:10:03 +02001316/* reads <bytes> bytes from buffer <b> starting at relative offset <o> from the
1317 * current pointer, dealing with wrapping, and stores the result in <dst>. It's
1318 * the caller's responsibility to verify that there are at least <bytes> bytes
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001319 * available in the buffer's input prior to calling this function. The buffer
1320 * is assumed not to hold any output data.
Willy Tarreau54c15062017-10-10 17:10:03 +02001321 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001322static inline __maybe_unused void h2_get_buf_bytes(void *dst, size_t bytes,
Willy Tarreau54c15062017-10-10 17:10:03 +02001323 const struct buffer *b, int o)
1324{
Willy Tarreau591d4452018-06-15 17:21:00 +02001325 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 +02001326}
1327
Willy Tarreau1f094672017-11-20 21:27:45 +01001328static inline __maybe_unused uint16_t h2_get_n16(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001329{
Willy Tarreau591d4452018-06-15 17:21:00 +02001330 return readv_n16(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001331}
1332
Willy Tarreau1f094672017-11-20 21:27:45 +01001333static inline __maybe_unused uint32_t h2_get_n32(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001334{
Willy Tarreau591d4452018-06-15 17:21:00 +02001335 return readv_n32(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001336}
1337
Willy Tarreau1f094672017-11-20 21:27:45 +01001338static inline __maybe_unused uint64_t h2_get_n64(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001339{
Willy Tarreau591d4452018-06-15 17:21:00 +02001340 return readv_n64(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001341}
1342
1343
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001344/* Peeks an H2 frame header from offset <o> of buffer <b> into descriptor <h>.
1345 * The algorithm is not obvious. It turns out that H2 headers are neither
1346 * aligned nor do they use regular sizes. And to add to the trouble, the buffer
1347 * may wrap so each byte read must be checked. The header is formed like this :
Willy Tarreau715d5312017-07-11 15:20:24 +02001348 *
1349 * b0 b1 b2 b3 b4 b5..b8
1350 * +----------+---------+--------+----+----+----------------------+
1351 * |len[23:16]|len[15:8]|len[7:0]|type|flag|sid[31:0] (big endian)|
1352 * +----------+---------+--------+----+----+----------------------+
1353 *
1354 * Here we read a big-endian 64 bit word from h[1]. This way in a single read
1355 * we get the sid properly aligned and ordered, and 16 bits of len properly
1356 * ordered as well. The type and flags can be extracted using bit shifts from
1357 * the word, and only one extra read is needed to fetch len[16:23].
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001358 * Returns zero if some bytes are missing, otherwise non-zero on success. The
1359 * buffer is assumed not to contain any output data.
Willy Tarreau715d5312017-07-11 15:20:24 +02001360 */
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001361static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, int o, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001362{
1363 uint64_t w;
1364
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001365 if (b_data(b) < o + 9)
Willy Tarreau715d5312017-07-11 15:20:24 +02001366 return 0;
1367
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001368 w = h2_get_n64(b, o + 1);
1369 h->len = *(uint8_t*)b_peek(b, o) << 16;
Willy Tarreau715d5312017-07-11 15:20:24 +02001370 h->sid = w & 0x7FFFFFFF; /* RFC7540#4.1: R bit must be ignored */
1371 h->ff = w >> 32;
1372 h->ft = w >> 40;
1373 h->len += w >> 48;
1374 return 1;
1375}
1376
1377/* skip the next 9 bytes corresponding to the frame header possibly parsed by
1378 * h2_peek_frame_hdr() above.
1379 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001380static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b)
Willy Tarreau715d5312017-07-11 15:20:24 +02001381{
Willy Tarreaue5f12ce2018-06-15 10:28:05 +02001382 b_del(b, 9);
Willy Tarreau715d5312017-07-11 15:20:24 +02001383}
1384
1385/* same as above, automatically advances the buffer on success */
Willy Tarreau1f094672017-11-20 21:27:45 +01001386static inline __maybe_unused int h2_get_frame_hdr(struct buffer *b, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001387{
1388 int ret;
1389
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001390 ret = h2_peek_frame_hdr(b, 0, h);
Willy Tarreau715d5312017-07-11 15:20:24 +02001391 if (ret > 0)
1392 h2_skip_frame_hdr(b);
1393 return ret;
1394}
1395
Willy Tarreaucb985a42019-10-07 16:56:34 +02001396
1397/* try to fragment the headers frame present at the beginning of buffer <b>,
1398 * enforcing a limit of <mfs> bytes per frame. Returns 0 on failure, 1 on
1399 * success. Typical causes of failure include a buffer not large enough to
1400 * add extra frame headers. The existing frame size is read in the current
1401 * frame. Its EH flag will be cleared if CONTINUATION frames need to be added,
1402 * and its length will be adjusted. The stream ID for continuation frames will
1403 * be copied from the initial frame's.
1404 */
1405static int h2_fragment_headers(struct buffer *b, uint32_t mfs)
1406{
1407 size_t remain = b->data - 9;
1408 int extra_frames = (remain - 1) / mfs;
1409 size_t fsize;
1410 char *fptr;
1411 int frame;
1412
1413 if (b->data <= mfs + 9)
1414 return 1;
1415
1416 /* Too large a frame, we need to fragment it using CONTINUATION
1417 * frames. We start from the end and move tails as needed.
1418 */
1419 if (b->data + extra_frames * 9 > b->size)
1420 return 0;
1421
1422 for (frame = extra_frames; frame; frame--) {
1423 fsize = ((remain - 1) % mfs) + 1;
1424 remain -= fsize;
1425
1426 /* move data */
1427 fptr = b->area + 9 + remain + (frame - 1) * 9;
1428 memmove(fptr + 9, b->area + 9 + remain, fsize);
1429 b->data += 9;
1430
1431 /* write new frame header */
1432 h2_set_frame_size(fptr, fsize);
1433 fptr[3] = H2_FT_CONTINUATION;
1434 fptr[4] = (frame == extra_frames) ? H2_F_HEADERS_END_HEADERS : 0;
1435 write_n32(fptr + 5, read_n32(b->area + 5));
1436 }
1437
1438 b->area[4] &= ~H2_F_HEADERS_END_HEADERS;
1439 h2_set_frame_size(b->area, remain);
1440 return 1;
1441}
1442
1443
Willy Tarreau00dd0782018-03-01 16:31:34 +01001444/* marks stream <h2s> as CLOSED and decrement the number of active streams for
1445 * its connection if the stream was not yet closed. Please use this exclusively
1446 * before closing a stream to ensure stream count is well maintained.
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001447 */
Willy Tarreau00dd0782018-03-01 16:31:34 +01001448static inline void h2s_close(struct h2s *h2s)
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001449{
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001450 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001451 TRACE_ENTER(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001452 h2s->h2c->nb_streams--;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001453 if (!h2s->id)
1454 h2s->h2c->nb_reserved--;
Willy Tarreaua27db382019-03-25 18:13:16 +01001455 if (h2s->cs) {
Willy Tarreaua27db382019-03-25 18:13:16 +01001456 if (!(h2s->cs->flags & CS_FL_EOS) && !b_data(&h2s->rxbuf))
1457 h2s_notify_recv(h2s);
1458 }
Willy Tarreau4781b152021-04-06 13:53:36 +02001459 HA_ATOMIC_DEC(&h2s->h2c->px_counters->open_streams);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001460
Willy Tarreau7838a792019-08-12 18:42:03 +02001461 TRACE_LEAVE(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001462 }
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001463 h2s->st = H2_SS_CLOSED;
1464}
1465
Willy Tarreau71049cc2018-03-28 13:56:39 +02001466/* detaches an H2 stream from its H2C and releases it to the H2S pool. */
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001467/* h2s_destroy should only ever be called by the thread that owns the stream,
1468 * that means that a tasklet should be used if we want to destroy the h2s
1469 * from another thread
1470 */
Willy Tarreau71049cc2018-03-28 13:56:39 +02001471static void h2s_destroy(struct h2s *h2s)
Willy Tarreau0a10de62018-03-01 16:27:53 +01001472{
Willy Tarreau7838a792019-08-12 18:42:03 +02001473 struct connection *conn = h2s->h2c->conn;
1474
1475 TRACE_ENTER(H2_EV_H2S_END, conn, h2s);
1476
Willy Tarreau0a10de62018-03-01 16:27:53 +01001477 h2s_close(h2s);
1478 eb32_delete(&h2s->by_id);
Olivier Houchard638b7992018-08-16 15:41:52 +02001479 if (b_size(&h2s->rxbuf)) {
1480 b_free(&h2s->rxbuf);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01001481 offer_buffers(NULL, 1);
Olivier Houchard638b7992018-08-16 15:41:52 +02001482 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001483
1484 if (h2s->subs)
1485 h2s->subs->events = 0;
1486
Joseph Herlantd77575d2018-11-25 10:54:45 -08001487 /* There's no need to explicitly call unsubscribe here, the only
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001488 * reference left would be in the h2c send_list/fctl_list, and if
1489 * we're in it, we're getting out anyway
1490 */
Olivier Houchardd360ac62019-03-22 17:37:16 +01001491 LIST_DEL_INIT(&h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01001492
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001493 /* ditto, calling tasklet_free() here should be ok */
Willy Tarreau5723f292020-01-10 15:16:57 +01001494 tasklet_free(h2s->shut_tl);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001495 pool_free(pool_head_h2s, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001496
1497 TRACE_LEAVE(H2_EV_H2S_END, conn);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001498}
1499
Willy Tarreaua8e49542018-10-03 18:53:55 +02001500/* allocates a new stream <id> for connection <h2c> and adds it into h2c's
1501 * stream tree. In case of error, nothing is added and NULL is returned. The
1502 * causes of errors can be any failed memory allocation. The caller is
1503 * responsible for checking if the connection may support an extra stream
1504 * prior to calling this function.
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001505 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02001506static struct h2s *h2s_new(struct h2c *h2c, int id)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001507{
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001508 struct h2s *h2s;
1509
Willy Tarreau7838a792019-08-12 18:42:03 +02001510 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1511
Willy Tarreaubafbe012017-11-24 17:34:44 +01001512 h2s = pool_alloc(pool_head_h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001513 if (!h2s)
1514 goto out;
1515
Willy Tarreau5723f292020-01-10 15:16:57 +01001516 h2s->shut_tl = tasklet_new();
1517 if (!h2s->shut_tl) {
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001518 pool_free(pool_head_h2s, h2s);
1519 goto out;
1520 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001521 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01001522 h2s->shut_tl->process = h2_deferred_shut;
1523 h2s->shut_tl->context = h2s;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001524 LIST_INIT(&h2s->list);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001525 h2s->h2c = h2c;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001526 h2s->cs = NULL;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001527 h2s->sws = 0;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001528 h2s->flags = H2_SF_NONE;
1529 h2s->errcode = H2_ERR_NO_ERROR;
1530 h2s->st = H2_SS_IDLE;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02001531 h2s->status = 0;
Willy Tarreau1915ca22019-01-24 11:49:37 +01001532 h2s->body_len = 0;
Olivier Houchard638b7992018-08-16 15:41:52 +02001533 h2s->rxbuf = BUF_NULL;
Amaury Denoyelle74162742020-12-11 17:53:05 +01001534 memset(h2s->upgrade_protocol, 0, sizeof(h2s->upgrade_protocol));
Willy Tarreau751f2d02018-10-05 09:35:00 +02001535
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001536 h2s->by_id.key = h2s->id = id;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001537 if (id > 0)
1538 h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001539 else
1540 h2c->nb_reserved++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001541
1542 eb32_insert(&h2c->streams_by_id, &h2s->by_id);
Willy Tarreau49745612017-12-03 18:56:02 +01001543 h2c->nb_streams++;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001544 h2c->stream_cnt++;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001545
Willy Tarreau4781b152021-04-06 13:53:36 +02001546 HA_ATOMIC_INC(&h2c->px_counters->open_streams);
1547 HA_ATOMIC_INC(&h2c->px_counters->total_streams);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001548
Willy Tarreau7838a792019-08-12 18:42:03 +02001549 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001550 return h2s;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001551 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001552 TRACE_DEVEL("leaving in error", H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001553 return NULL;
1554}
1555
1556/* creates a new stream <id> on the h2c connection and returns it, or NULL in
Christopher Faulet7d013e72020-12-15 16:56:50 +01001557 * case of memory allocation error. <input> is used as input buffer for the new
1558 * stream. On success, it is transferred to the stream and the mux is no longer
1559 * responsible of it. On error, <input> is unchanged, thus the mux must still
1560 * take care of it.
Willy Tarreaua8e49542018-10-03 18:53:55 +02001561 */
Amaury Denoyelleee7fcd52021-10-18 14:45:49 +02001562static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id, struct buffer *input, uint32_t flags)
Willy Tarreaua8e49542018-10-03 18:53:55 +02001563{
1564 struct session *sess = h2c->conn->owner;
1565 struct conn_stream *cs;
1566 struct h2s *h2s;
1567
Willy Tarreau7838a792019-08-12 18:42:03 +02001568 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1569
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001570 if (h2c->nb_streams >= h2_settings_max_concurrent_streams) {
1571 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 +02001572 goto out;
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001573 }
Willy Tarreaua8e49542018-10-03 18:53:55 +02001574
1575 h2s = h2s_new(h2c, id);
1576 if (!h2s)
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001577 goto out_alloc;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001578
Christopher Faulet236c93b2020-07-02 09:19:54 +02001579 cs = cs_new(h2c->conn, h2c->conn->target);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001580 if (!cs)
1581 goto out_close;
1582
Olivier Houchard746fb772018-12-15 19:42:00 +01001583 cs->flags |= CS_FL_NOT_FIRST;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001584 h2s->cs = cs;
1585 cs->ctx = h2s;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001586 h2c->nb_cs++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001587
Amaury Denoyelleee7fcd52021-10-18 14:45:49 +02001588 /* FIXME wrong analogy between ext-connect and websocket, this need to
1589 * be refine.
1590 */
1591 if (flags & H2_SF_EXT_CONNECT_RCVD)
1592 cs->flags |= CS_FL_WEBSOCKET;
1593
Willy Tarreaua217df92022-02-04 09:05:37 +01001594 /* The stream will record the request's accept date (which is either the
1595 * end of the connection's or the date immediately after the previous
1596 * request) and the idle time, which is the delay since the previous
1597 * request. We can set the value now, it will be copied by stream_new().
1598 */
1599 sess->t_idle = tv_ms_elapsed(&sess->tv_accept, &now) - sess->t_handshake;
Christopher Faulet7d013e72020-12-15 16:56:50 +01001600 if (stream_create_from_cs(cs, input) < 0)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001601 goto out_free_cs;
1602
Willy Tarreau590a0512018-09-05 11:56:48 +02001603 /* We want the accept date presented to the next stream to be the one
1604 * we have now, the handshake time to be null (since the next stream
1605 * is not delayed by a handshake), and the idle time to count since
1606 * right now.
1607 */
1608 sess->accept_date = date;
1609 sess->tv_accept = now;
1610 sess->t_handshake = 0;
Willy Tarreaua217df92022-02-04 09:05:37 +01001611 sess->t_idle = 0;
Willy Tarreau590a0512018-09-05 11:56:48 +02001612
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001613 /* OK done, the stream lives its own life now */
Willy Tarreaufa1d3572019-01-31 10:31:51 +01001614 if (h2_frt_has_too_many_cs(h2c))
Willy Tarreauf2101912018-07-19 10:11:38 +02001615 h2c->flags |= H2_CF_DEM_TOOMANY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001616 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001617 return h2s;
1618
1619 out_free_cs:
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001620 h2c->nb_cs--;
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01001621 if (!h2c->nb_cs)
1622 h2c->idle_start = now_ms;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001623 cs_free(cs);
Olivier Houchard58d87f32019-05-29 16:44:17 +02001624 h2s->cs = NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001625 out_close:
Willy Tarreau71049cc2018-03-28 13:56:39 +02001626 h2s_destroy(h2s);
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001627 out_alloc:
1628 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 +02001629 out:
Willy Tarreau45efc072018-10-03 18:27:52 +02001630 sess_log(sess);
Willy Tarreau7838a792019-08-12 18:42:03 +02001631 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreau45efc072018-10-03 18:27:52 +02001632 return NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001633}
1634
Willy Tarreau751f2d02018-10-05 09:35:00 +02001635/* allocates a new stream associated to conn_stream <cs> on the h2c connection
1636 * and returns it, or NULL in case of memory allocation error or if the highest
1637 * possible stream ID was reached.
1638 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01001639static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001640{
1641 struct h2s *h2s = NULL;
1642
Willy Tarreau7838a792019-08-12 18:42:03 +02001643 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1644
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001645 if (h2c->nb_streams >= h2c->streams_limit) {
1646 TRACE_ERROR("Aborting stream since negotiated limit is too low", H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001647 goto out;
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001648 }
Willy Tarreau751f2d02018-10-05 09:35:00 +02001649
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001650 if (h2_streams_left(h2c) < 1) {
1651 TRACE_ERROR("Aborting stream since no more streams left", H2_EV_H2S_NEW, h2c->conn);
Willy Tarreaua80dca82019-01-24 17:08:28 +01001652 goto out;
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001653 }
Willy Tarreaua80dca82019-01-24 17:08:28 +01001654
Willy Tarreau751f2d02018-10-05 09:35:00 +02001655 /* Defer choosing the ID until we send the first message to create the stream */
1656 h2s = h2s_new(h2c, 0);
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001657 if (!h2s) {
1658 TRACE_ERROR("Failed to allocate a new stream", H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001659 goto out;
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001660 }
Willy Tarreau751f2d02018-10-05 09:35:00 +02001661
1662 h2s->cs = cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001663 h2s->sess = sess;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001664 cs->ctx = h2s;
1665 h2c->nb_cs++;
1666
Willy Tarreau751f2d02018-10-05 09:35:00 +02001667 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001668 if (likely(h2s))
1669 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
1670 else
1671 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn, h2s);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001672 return h2s;
1673}
1674
Willy Tarreaube5b7152017-09-25 16:25:39 +02001675/* try to send a settings frame on the connection. Returns > 0 on success, 0 if
1676 * it couldn't do anything. It may return an error in h2c. See RFC7540#11.3 for
1677 * the various settings codes.
1678 */
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001679static int h2c_send_settings(struct h2c *h2c)
Willy Tarreaube5b7152017-09-25 16:25:39 +02001680{
1681 struct buffer *res;
1682 char buf_data[100]; // enough for 15 settings
Willy Tarreau83061a82018-07-13 11:56:34 +02001683 struct buffer buf;
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001684 int mfs;
Willy Tarreau7838a792019-08-12 18:42:03 +02001685 int ret = 0;
1686
1687 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001688
1689 if (h2c_mux_busy(h2c, NULL)) {
1690 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001691 goto out;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001692 }
1693
Willy Tarreaube5b7152017-09-25 16:25:39 +02001694 chunk_init(&buf, buf_data, sizeof(buf_data));
1695 chunk_memcpy(&buf,
1696 "\x00\x00\x00" /* length : 0 for now */
1697 "\x04\x00" /* type : 4 (settings), flags : 0 */
1698 "\x00\x00\x00\x00", /* stream ID : 0 */
1699 9);
1700
Willy Tarreau0bbad6b2019-02-26 16:01:52 +01001701 if (h2c->flags & H2_CF_IS_BACK) {
1702 /* send settings_enable_push=0 */
1703 chunk_memcat(&buf, "\x00\x02\x00\x00\x00\x00", 6);
1704 }
1705
Amaury Denoyelle0ea2c4f2021-07-09 17:14:30 +02001706 /* rfc 8441 #3 SETTINGS_ENABLE_CONNECT_PROTOCOL=1,
1707 * sent automatically unless disabled in the global config */
1708 if (!(global.tune.options & GTUNE_DISABLE_H2_WEBSOCKET))
1709 chunk_memcat(&buf, "\x00\x08\x00\x00\x00\x01", 6);
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01001710
Willy Tarreaube5b7152017-09-25 16:25:39 +02001711 if (h2_settings_header_table_size != 4096) {
1712 char str[6] = "\x00\x01"; /* header_table_size */
1713
1714 write_n32(str + 2, h2_settings_header_table_size);
1715 chunk_memcat(&buf, str, 6);
1716 }
1717
1718 if (h2_settings_initial_window_size != 65535) {
1719 char str[6] = "\x00\x04"; /* initial_window_size */
1720
1721 write_n32(str + 2, h2_settings_initial_window_size);
1722 chunk_memcat(&buf, str, 6);
1723 }
1724
1725 if (h2_settings_max_concurrent_streams != 0) {
1726 char str[6] = "\x00\x03"; /* max_concurrent_streams */
1727
1728 /* Note: 0 means "unlimited" for haproxy's config but not for
1729 * the protocol, so never send this value!
1730 */
1731 write_n32(str + 2, h2_settings_max_concurrent_streams);
1732 chunk_memcat(&buf, str, 6);
1733 }
1734
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001735 mfs = h2_settings_max_frame_size;
1736 if (mfs > global.tune.bufsize)
1737 mfs = global.tune.bufsize;
1738
1739 if (!mfs)
1740 mfs = global.tune.bufsize;
1741
1742 if (mfs != 16384) {
Willy Tarreaube5b7152017-09-25 16:25:39 +02001743 char str[6] = "\x00\x05"; /* max_frame_size */
1744
1745 /* note: similarly we could also emit MAX_HEADER_LIST_SIZE to
1746 * match bufsize - rewrite size, but at the moment it seems
1747 * that clients don't take care of it.
1748 */
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001749 write_n32(str + 2, mfs);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001750 chunk_memcat(&buf, str, 6);
1751 }
1752
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001753 h2_set_frame_size(buf.area, buf.data - 9);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001754
1755 res = br_tail(h2c->mbuf);
1756 retry:
1757 if (!h2_get_buf(h2c, res)) {
1758 h2c->flags |= H2_CF_MUX_MALLOC;
1759 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001760 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001761 }
1762
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001763 ret = b_istput(res, ist2(buf.area, buf.data));
Willy Tarreaube5b7152017-09-25 16:25:39 +02001764 if (unlikely(ret <= 0)) {
1765 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001766 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1767 goto retry;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001768 h2c->flags |= H2_CF_MUX_MFULL;
1769 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001770 }
1771 else {
1772 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001773 ret = 0;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001774 }
1775 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001776 out:
1777 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001778 return ret;
1779}
1780
Willy Tarreau52eed752017-09-22 15:05:09 +02001781/* Try to receive a connection preface, then upon success try to send our
1782 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1783 * missing data. It may return an error in h2c.
1784 */
1785static int h2c_frt_recv_preface(struct h2c *h2c)
1786{
1787 int ret1;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001788 int ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001789
Willy Tarreau7838a792019-08-12 18:42:03 +02001790 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
1791
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001792 ret1 = b_isteq(&h2c->dbuf, 0, b_data(&h2c->dbuf), ist(H2_CONN_PREFACE));
Willy Tarreau52eed752017-09-22 15:05:09 +02001793
1794 if (unlikely(ret1 <= 0)) {
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02001795 if (!ret1)
1796 h2c->flags |= H2_CF_DEM_SHORT_READ;
Amaury Denoyellea8879232020-10-27 17:16:03 +01001797 if (ret1 < 0 || conn_xprt_read0_pending(h2c->conn)) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01001798 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 +02001799 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc23d6d12021-06-17 08:08:48 +02001800 if (b_data(&h2c->dbuf) ||
1801 !(((const struct session *)h2c->conn->owner)->fe->options & PR_O_IGNORE_PRB))
1802 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Amaury Denoyellea8879232020-10-27 17:16:03 +01001803 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001804 ret2 = 0;
1805 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02001806 }
1807
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001808 ret2 = h2c_send_settings(h2c);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001809 if (ret2 > 0)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001810 b_del(&h2c->dbuf, ret1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001811 out:
1812 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001813 return ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001814}
1815
Willy Tarreau01b44822018-10-03 14:26:37 +02001816/* Try to send a connection preface, then upon success try to send our
1817 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1818 * missing data. It may return an error in h2c.
1819 */
1820static int h2c_bck_send_preface(struct h2c *h2c)
1821{
1822 struct buffer *res;
Willy Tarreau7838a792019-08-12 18:42:03 +02001823 int ret = 0;
1824
1825 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02001826
1827 if (h2c_mux_busy(h2c, NULL)) {
1828 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001829 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001830 }
1831
Willy Tarreaubcc45952019-05-26 10:05:50 +02001832 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001833 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001834 if (!h2_get_buf(h2c, res)) {
Willy Tarreau01b44822018-10-03 14:26:37 +02001835 h2c->flags |= H2_CF_MUX_MALLOC;
1836 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001837 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001838 }
1839
1840 if (!b_data(res)) {
1841 /* preface not yet sent */
Willy Tarreau9c218e72019-05-26 10:08:28 +02001842 ret = b_istput(res, ist(H2_CONN_PREFACE));
1843 if (unlikely(ret <= 0)) {
1844 if (!ret) {
1845 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1846 goto retry;
1847 h2c->flags |= H2_CF_MUX_MFULL;
1848 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001849 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001850 }
1851 else {
1852 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001853 ret = 0;
1854 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001855 }
1856 }
Willy Tarreau01b44822018-10-03 14:26:37 +02001857 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001858 ret = h2c_send_settings(h2c);
1859 out:
1860 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
1861 return ret;
Willy Tarreau01b44822018-10-03 14:26:37 +02001862}
1863
Willy Tarreau081d4722017-05-16 21:51:05 +02001864/* try to send a GOAWAY frame on the connection to report an error or a graceful
1865 * shutdown, with h2c->errcode as the error code. Returns > 0 on success or zero
1866 * if nothing was done. It uses h2c->last_sid as the advertised ID, or copies it
1867 * from h2c->max_id if it's not set yet (<0). In case of lack of room to write
1868 * the message, it subscribes the requester (either <h2s> or <h2c>) to future
1869 * notifications. It sets H2_CF_GOAWAY_SENT on success, and H2_CF_GOAWAY_FAILED
1870 * on unrecoverable failure. It will not attempt to send one again in this last
Willy Tarreauec26f622022-04-13 09:40:52 +02001871 * case, nor will it send one if settings were not sent (e.g. still waiting for
1872 * a preface) so that it is safe to use h2c_error() to report such errors.
Willy Tarreau081d4722017-05-16 21:51:05 +02001873 */
1874static int h2c_send_goaway_error(struct h2c *h2c, struct h2s *h2s)
1875{
1876 struct buffer *res;
1877 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02001878 int ret = 0;
Willy Tarreau081d4722017-05-16 21:51:05 +02001879
Willy Tarreau7838a792019-08-12 18:42:03 +02001880 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
1881
Willy Tarreauec26f622022-04-13 09:40:52 +02001882 if ((h2c->flags & H2_CF_GOAWAY_FAILED) || h2c->st0 < H2_CS_SETTINGS1) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001883 ret = 1; // claim that it worked
1884 goto out;
1885 }
Willy Tarreau081d4722017-05-16 21:51:05 +02001886
1887 if (h2c_mux_busy(h2c, h2s)) {
1888 if (h2s)
1889 h2s->flags |= H2_SF_BLK_MBUSY;
1890 else
1891 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001892 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001893 }
1894
Willy Tarreau9c218e72019-05-26 10:08:28 +02001895 /* len: 8, type: 7, flags: none, sid: 0 */
1896 memcpy(str, "\x00\x00\x08\x07\x00\x00\x00\x00\x00", 9);
1897
1898 if (h2c->last_sid < 0)
1899 h2c->last_sid = h2c->max_id;
1900
1901 write_n32(str + 9, h2c->last_sid);
1902 write_n32(str + 13, h2c->errcode);
1903
Willy Tarreaubcc45952019-05-26 10:05:50 +02001904 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001905 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001906 if (!h2_get_buf(h2c, res)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02001907 h2c->flags |= H2_CF_MUX_MALLOC;
1908 if (h2s)
1909 h2s->flags |= H2_SF_BLK_MROOM;
1910 else
1911 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001912 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001913 }
1914
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001915 ret = b_istput(res, ist2(str, 17));
Willy Tarreau081d4722017-05-16 21:51:05 +02001916 if (unlikely(ret <= 0)) {
1917 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001918 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1919 goto retry;
Willy Tarreau081d4722017-05-16 21:51:05 +02001920 h2c->flags |= H2_CF_MUX_MFULL;
1921 if (h2s)
1922 h2s->flags |= H2_SF_BLK_MROOM;
1923 else
1924 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001925 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001926 }
1927 else {
1928 /* we cannot report this error using GOAWAY, so we mark
1929 * it and claim a success.
1930 */
1931 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1932 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau7838a792019-08-12 18:42:03 +02001933 ret = 1;
1934 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001935 }
1936 }
1937 h2c->flags |= H2_CF_GOAWAY_SENT;
Willy Tarreauf965b2a2020-12-01 10:47:18 +01001938
1939 /* some codes are not for real errors, just attempts to close cleanly */
1940 switch (h2c->errcode) {
1941 case H2_ERR_NO_ERROR:
1942 case H2_ERR_ENHANCE_YOUR_CALM:
1943 case H2_ERR_REFUSED_STREAM:
1944 case H2_ERR_CANCEL:
1945 break;
1946 default:
Willy Tarreau4781b152021-04-06 13:53:36 +02001947 HA_ATOMIC_INC(&h2c->px_counters->goaway_resp);
Willy Tarreauf965b2a2020-12-01 10:47:18 +01001948 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001949 out:
1950 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
Willy Tarreau081d4722017-05-16 21:51:05 +02001951 return ret;
1952}
1953
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001954/* Try to send an RST_STREAM frame on the connection for the indicated stream
1955 * during mux operations. This stream must be valid and cannot be closed
1956 * already. h2s->id will be used for the stream ID and h2s->errcode will be
1957 * used for the error code. h2s->st will be update to H2_SS_CLOSED if it was
1958 * not yet.
1959 *
1960 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1961 * to write the message, it subscribes the stream to future notifications.
1962 */
1963static int h2s_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1964{
1965 struct buffer *res;
1966 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001967 int ret = 0;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001968
Willy Tarreau7838a792019-08-12 18:42:03 +02001969 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
1970
1971 if (!h2s || h2s->st == H2_SS_CLOSED) {
1972 ret = 1;
1973 goto out;
1974 }
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001975
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001976 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1977 * RST_STREAM in response to a RST_STREAM frame.
1978 */
Willy Tarreau231f6162019-08-06 10:01:40 +02001979 if (h2c->dsi == h2s->id && h2c->dft == H2_FT_RST_STREAM) {
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001980 ret = 1;
1981 goto ignore;
1982 }
1983
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001984 if (h2c_mux_busy(h2c, h2s)) {
1985 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001986 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001987 }
1988
Willy Tarreau9c218e72019-05-26 10:08:28 +02001989 /* len: 4, type: 3, flags: none */
1990 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1991 write_n32(str + 5, h2s->id);
1992 write_n32(str + 9, h2s->errcode);
1993
Willy Tarreaubcc45952019-05-26 10:05:50 +02001994 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001995 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001996 if (!h2_get_buf(h2c, res)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001997 h2c->flags |= H2_CF_MUX_MALLOC;
1998 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001999 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002000 }
2001
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002002 ret = b_istput(res, ist2(str, 13));
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002003 if (unlikely(ret <= 0)) {
2004 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002005 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2006 goto retry;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002007 h2c->flags |= H2_CF_MUX_MFULL;
2008 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002009 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002010 }
2011 else {
2012 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002013 ret = 0;
2014 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002015 }
2016 }
2017
Willy Tarreau8adae7c2018-03-22 17:37:05 +01002018 ignore:
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002019 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01002020 h2s_close(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002021 out:
2022 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002023 return ret;
2024}
2025
2026/* Try to send an RST_STREAM frame on the connection for the stream being
2027 * demuxed using h2c->dsi for the stream ID. It will use h2s->errcode as the
Willy Tarreaue6888ff2018-12-23 18:26:26 +01002028 * error code, even if the stream is one of the dummy ones, and will update
2029 * h2s->st to H2_SS_CLOSED if it was not yet.
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002030 *
2031 * Returns > 0 on success or zero if nothing was done. In case of lack of room
2032 * to write the message, it blocks the demuxer and subscribes it to future
Joseph Herlantd77575d2018-11-25 10:54:45 -08002033 * notifications. It's worth mentioning that an RST may even be sent for a
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002034 * closed stream.
Willy Tarreau27a84c92017-10-17 08:10:17 +02002035 */
2036static int h2c_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
2037{
2038 struct buffer *res;
2039 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002040 int ret = 0;
2041
2042 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02002043
Willy Tarreau8adae7c2018-03-22 17:37:05 +01002044 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
2045 * RST_STREAM in response to a RST_STREAM frame.
2046 */
2047 if (h2c->dft == H2_FT_RST_STREAM) {
2048 ret = 1;
2049 goto ignore;
2050 }
2051
Willy Tarreau27a84c92017-10-17 08:10:17 +02002052 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002053 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002054 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002055 }
2056
Willy Tarreau9c218e72019-05-26 10:08:28 +02002057 /* len: 4, type: 3, flags: none */
2058 memcpy(str, "\x00\x00\x04\x03\x00", 5);
2059
2060 write_n32(str + 5, h2c->dsi);
2061 write_n32(str + 9, h2s->errcode);
2062
Willy Tarreaubcc45952019-05-26 10:05:50 +02002063 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002064 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002065 if (!h2_get_buf(h2c, res)) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02002066 h2c->flags |= H2_CF_MUX_MALLOC;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002067 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002068 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002069 }
2070
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002071 ret = b_istput(res, ist2(str, 13));
Willy Tarreau27a84c92017-10-17 08:10:17 +02002072 if (unlikely(ret <= 0)) {
2073 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002074 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2075 goto retry;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002076 h2c->flags |= H2_CF_MUX_MFULL;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002077 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002078 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002079 }
2080 else {
2081 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002082 ret = 0;
2083 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002084 }
2085 }
2086
Willy Tarreau8adae7c2018-03-22 17:37:05 +01002087 ignore:
Willy Tarreauab0e1da2018-10-05 10:16:37 +02002088 if (h2s->id) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02002089 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01002090 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002091 }
2092
Willy Tarreau7838a792019-08-12 18:42:03 +02002093 out:
Willy Tarreau4781b152021-04-06 13:53:36 +02002094 HA_ATOMIC_INC(&h2c->px_counters->rst_stream_resp);
Willy Tarreau7838a792019-08-12 18:42:03 +02002095 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02002096 return ret;
2097}
2098
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002099/* try to send an empty DATA frame with the ES flag set to notify about the
2100 * end of stream and match a shutdown(write). If an ES was already sent as
2101 * indicated by HLOC/ERROR/RESET/CLOSED states, nothing is done. Returns > 0
2102 * on success or zero if nothing was done. In case of lack of room to write the
2103 * message, it subscribes the requesting stream to future notifications.
2104 */
2105static int h2_send_empty_data_es(struct h2s *h2s)
2106{
2107 struct h2c *h2c = h2s->h2c;
2108 struct buffer *res;
2109 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002110 int ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002111
Willy Tarreau7838a792019-08-12 18:42:03 +02002112 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
2113
2114 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED) {
2115 ret = 1;
2116 goto out;
2117 }
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002118
2119 if (h2c_mux_busy(h2c, h2s)) {
2120 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002121 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002122 }
2123
Willy Tarreau9c218e72019-05-26 10:08:28 +02002124 /* len: 0x000000, type: 0(DATA), flags: ES=1 */
2125 memcpy(str, "\x00\x00\x00\x00\x01", 5);
2126 write_n32(str + 5, h2s->id);
2127
Willy Tarreaubcc45952019-05-26 10:05:50 +02002128 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002129 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002130 if (!h2_get_buf(h2c, res)) {
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002131 h2c->flags |= H2_CF_MUX_MALLOC;
2132 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002133 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002134 }
2135
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002136 ret = b_istput(res, ist2(str, 9));
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002137 if (likely(ret > 0)) {
2138 h2s->flags |= H2_SF_ES_SENT;
2139 }
2140 else if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002141 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2142 goto retry;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002143 h2c->flags |= H2_CF_MUX_MFULL;
2144 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002145 }
2146 else {
2147 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002148 ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002149 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002150 out:
2151 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002152 return ret;
2153}
2154
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05002155/* wake a specific stream and assign its conn_stream some CS_FL_* flags among
Willy Tarreau99ad1b32019-05-14 11:46:28 +02002156 * CS_FL_ERR_PENDING and CS_FL_ERROR if needed. The stream's state
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002157 * is automatically updated accordingly. If the stream is orphaned, it is
2158 * destroyed.
Christopher Fauletf02ca002019-03-07 16:21:34 +01002159 */
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002160static void h2s_wake_one_stream(struct h2s *h2s)
Christopher Fauletf02ca002019-03-07 16:21:34 +01002161{
Willy Tarreau7838a792019-08-12 18:42:03 +02002162 struct h2c *h2c = h2s->h2c;
2163
2164 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn, h2s);
2165
Christopher Fauletf02ca002019-03-07 16:21:34 +01002166 if (!h2s->cs) {
2167 /* this stream was already orphaned */
2168 h2s_destroy(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002169 TRACE_DEVEL("leaving with no h2s", H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002170 return;
2171 }
2172
Christopher Fauletaade4ed2020-10-08 15:38:41 +02002173 if (h2c_read0_pending(h2s->h2c)) {
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002174 if (h2s->st == H2_SS_OPEN)
2175 h2s->st = H2_SS_HREM;
2176 else if (h2s->st == H2_SS_HLOC)
2177 h2s_close(h2s);
2178 }
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002179
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002180 if ((h2s->h2c->st0 >= H2_CS_ERROR || h2s->h2c->conn->flags & CO_FL_ERROR) ||
2181 (h2s->h2c->last_sid > 0 && (!h2s->id || h2s->id > h2s->h2c->last_sid))) {
2182 h2s->cs->flags |= CS_FL_ERR_PENDING;
2183 if (h2s->cs->flags & CS_FL_EOS)
2184 h2s->cs->flags |= CS_FL_ERROR;
Willy Tarreau23482912019-05-07 15:23:14 +02002185
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002186 if (h2s->st < H2_SS_ERROR)
2187 h2s->st = H2_SS_ERROR;
2188 }
Christopher Fauletf02ca002019-03-07 16:21:34 +01002189
2190 h2s_alert(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002191 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002192}
2193
2194/* wake the streams attached to the connection, whose id is greater than <last>
2195 * or unassigned.
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002196 */
Willy Tarreau23482912019-05-07 15:23:14 +02002197static void h2_wake_some_streams(struct h2c *h2c, int last)
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002198{
2199 struct eb32_node *node;
2200 struct h2s *h2s;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002201
Willy Tarreau7838a792019-08-12 18:42:03 +02002202 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn);
2203
Christopher Fauletf02ca002019-03-07 16:21:34 +01002204 /* Wake all streams with ID > last */
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002205 node = eb32_lookup_ge(&h2c->streams_by_id, last + 1);
2206 while (node) {
2207 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002208 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002209 h2s_wake_one_stream(h2s);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002210 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01002211
Christopher Fauletf02ca002019-03-07 16:21:34 +01002212 /* Wake all streams with unassigned ID (ID == 0) */
2213 node = eb32_lookup(&h2c->streams_by_id, 0);
2214 while (node) {
2215 h2s = container_of(node, struct h2s, by_id);
2216 if (h2s->id > 0)
2217 break;
2218 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002219 h2s_wake_one_stream(h2s);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002220 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002221
2222 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002223}
2224
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002225/* Wake up all blocked streams whose window size has become positive after the
2226 * mux's initial window was adjusted. This should be done after having processed
2227 * SETTINGS frames which have updated the mux's initial window size.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002228 */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002229static void h2c_unblock_sfctl(struct h2c *h2c)
Willy Tarreau3421aba2017-07-27 15:41:03 +02002230{
2231 struct h2s *h2s;
2232 struct eb32_node *node;
2233
Willy Tarreau7838a792019-08-12 18:42:03 +02002234 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
2235
Willy Tarreau3421aba2017-07-27 15:41:03 +02002236 node = eb32_first(&h2c->streams_by_id);
2237 while (node) {
2238 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002239 if (h2s->flags & H2_SF_BLK_SFCTL && h2s_mws(h2s) > 0) {
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002240 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002241 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002242 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2243 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreau2b718102021-04-21 07:32:39 +02002244 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002245 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002246 node = eb32_next(node);
2247 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002248
2249 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002250}
2251
2252/* processes a SETTINGS frame whose payload is <payload> for <plen> bytes, and
2253 * ACKs it if needed. Returns > 0 on success or zero on missing data. It may
Willy Tarreaub860c732019-01-30 15:39:55 +01002254 * return an error in h2c. The caller must have already verified frame length
2255 * and stream ID validity. Described in RFC7540#6.5.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002256 */
2257static int h2c_handle_settings(struct h2c *h2c)
2258{
2259 unsigned int offset;
2260 int error;
2261
Willy Tarreau7838a792019-08-12 18:42:03 +02002262 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
2263
Willy Tarreau3421aba2017-07-27 15:41:03 +02002264 if (h2c->dff & H2_F_SETTINGS_ACK) {
2265 if (h2c->dfl) {
2266 error = H2_ERR_FRAME_SIZE_ERROR;
2267 goto fail;
2268 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002269 goto done;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002270 }
2271
Willy Tarreau3421aba2017-07-27 15:41:03 +02002272 /* process full frame only */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002273 if (b_data(&h2c->dbuf) < h2c->dfl) {
2274 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002275 goto out0;
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002276 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002277
2278 /* parse the frame */
2279 for (offset = 0; offset < h2c->dfl; offset += 6) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002280 uint16_t type = h2_get_n16(&h2c->dbuf, offset);
2281 int32_t arg = h2_get_n32(&h2c->dbuf, offset + 2);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002282
2283 switch (type) {
2284 case H2_SETTINGS_INITIAL_WINDOW_SIZE:
2285 /* we need to update all existing streams with the
2286 * difference from the previous iws.
2287 */
2288 if (arg < 0) { // RFC7540#6.5.2
2289 error = H2_ERR_FLOW_CONTROL_ERROR;
2290 goto fail;
2291 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002292 h2c->miw = arg;
2293 break;
2294 case H2_SETTINGS_MAX_FRAME_SIZE:
2295 if (arg < 16384 || arg > 16777215) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002296 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 +02002297 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002298 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002299 goto fail;
2300 }
2301 h2c->mfs = arg;
2302 break;
Willy Tarreau8a4dca02022-01-13 16:00:12 +01002303 case H2_SETTINGS_HEADER_TABLE_SIZE:
2304 h2c->flags |= H2_CF_SHTS_UPDATED;
2305 break;
Willy Tarreau1b38b462017-12-03 19:02:28 +01002306 case H2_SETTINGS_ENABLE_PUSH:
2307 if (arg < 0 || arg > 1) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002308 TRACE_ERROR("ENABLE_PUSH out of range", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002309 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002310 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002311 goto fail;
2312 }
2313 break;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01002314 case H2_SETTINGS_MAX_CONCURRENT_STREAMS:
2315 if (h2c->flags & H2_CF_IS_BACK) {
2316 /* the limit is only for the backend; for the frontend it is our limit */
2317 if ((unsigned int)arg > h2_settings_max_concurrent_streams)
2318 arg = h2_settings_max_concurrent_streams;
2319 h2c->streams_limit = arg;
2320 }
2321 break;
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01002322 case H2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
Amaury Denoyelle68993a12021-10-18 09:43:29 +02002323 if (arg == 1)
2324 h2c->flags |= H2_CF_RCVD_RFC8441;
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01002325 break;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002326 }
2327 }
2328
2329 /* need to ACK this frame now */
2330 h2c->st0 = H2_CS_FRAME_A;
Willy Tarreau7838a792019-08-12 18:42:03 +02002331 done:
2332 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002333 return 1;
2334 fail:
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002335 if (!(h2c->flags & H2_CF_IS_BACK))
2336 sess_log(h2c->conn->owner);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002337 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002338 out0:
2339 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 +02002340 return 0;
2341}
2342
2343/* try to send an ACK for a settings frame on the connection. Returns > 0 on
2344 * success or one of the h2_status values.
2345 */
2346static int h2c_ack_settings(struct h2c *h2c)
2347{
2348 struct buffer *res;
2349 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002350 int ret = 0;
2351
2352 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002353
2354 if (h2c_mux_busy(h2c, NULL)) {
2355 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002356 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002357 }
2358
Willy Tarreau9c218e72019-05-26 10:08:28 +02002359 memcpy(str,
2360 "\x00\x00\x00" /* length : 0 (no data) */
2361 "\x04" "\x01" /* type : 4, flags : ACK */
2362 "\x00\x00\x00\x00" /* stream ID */, 9);
2363
Willy Tarreaubcc45952019-05-26 10:05:50 +02002364 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002365 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002366 if (!h2_get_buf(h2c, res)) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02002367 h2c->flags |= H2_CF_MUX_MALLOC;
2368 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002369 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002370 }
2371
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002372 ret = b_istput(res, ist2(str, 9));
Willy Tarreau3421aba2017-07-27 15:41:03 +02002373 if (unlikely(ret <= 0)) {
2374 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002375 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2376 goto retry;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002377 h2c->flags |= H2_CF_MUX_MFULL;
2378 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002379 }
2380 else {
2381 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002382 ret = 0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002383 }
2384 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002385 out:
2386 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002387 return ret;
2388}
2389
Willy Tarreaucf68c782017-10-10 17:11:41 +02002390/* processes a PING frame and schedules an ACK if needed. The caller must pass
2391 * the pointer to the payload in <payload>. Returns > 0 on success or zero on
Willy Tarreaub860c732019-01-30 15:39:55 +01002392 * missing data. The caller must have already verified frame length
2393 * and stream ID validity.
Willy Tarreaucf68c782017-10-10 17:11:41 +02002394 */
2395static int h2c_handle_ping(struct h2c *h2c)
2396{
Willy Tarreaucf68c782017-10-10 17:11:41 +02002397 /* schedule a response */
Willy Tarreau68ed6412017-12-03 18:15:56 +01002398 if (!(h2c->dff & H2_F_PING_ACK))
Willy Tarreaucf68c782017-10-10 17:11:41 +02002399 h2c->st0 = H2_CS_FRAME_A;
2400 return 1;
2401}
2402
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002403/* Try to send a window update for stream id <sid> and value <increment>.
2404 * Returns > 0 on success or zero on missing room or failure. It may return an
2405 * error in h2c.
2406 */
2407static int h2c_send_window_update(struct h2c *h2c, int sid, uint32_t increment)
2408{
2409 struct buffer *res;
2410 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002411 int ret = 0;
2412
2413 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002414
2415 if (h2c_mux_busy(h2c, NULL)) {
2416 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002417 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002418 }
2419
Willy Tarreau9c218e72019-05-26 10:08:28 +02002420 /* length: 4, type: 8, flags: none */
2421 memcpy(str, "\x00\x00\x04\x08\x00", 5);
2422 write_n32(str + 5, sid);
2423 write_n32(str + 9, increment);
2424
Willy Tarreaubcc45952019-05-26 10:05:50 +02002425 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002426 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002427 if (!h2_get_buf(h2c, res)) {
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002428 h2c->flags |= H2_CF_MUX_MALLOC;
2429 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002430 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002431 }
2432
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002433 ret = b_istput(res, ist2(str, 13));
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002434 if (unlikely(ret <= 0)) {
2435 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002436 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2437 goto retry;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002438 h2c->flags |= H2_CF_MUX_MFULL;
2439 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002440 }
2441 else {
2442 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002443 ret = 0;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002444 }
2445 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002446 out:
2447 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002448 return ret;
2449}
2450
2451/* try to send pending window update for the connection. It's safe to call it
2452 * with no pending updates. Returns > 0 on success or zero on missing room or
2453 * failure. It may return an error in h2c.
2454 */
2455static int h2c_send_conn_wu(struct h2c *h2c)
2456{
2457 int ret = 1;
2458
Willy Tarreau7838a792019-08-12 18:42:03 +02002459 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2460
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002461 if (h2c->rcvd_c <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002462 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002463
Willy Tarreau97aaa672018-12-23 09:49:04 +01002464 if (!(h2c->flags & H2_CF_WINDOW_OPENED)) {
2465 /* increase the advertised connection window to 2G on
2466 * first update.
2467 */
2468 h2c->flags |= H2_CF_WINDOW_OPENED;
2469 h2c->rcvd_c += H2_INITIAL_WINDOW_INCREMENT;
2470 }
2471
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002472 /* send WU for the connection */
2473 ret = h2c_send_window_update(h2c, 0, h2c->rcvd_c);
2474 if (ret > 0)
2475 h2c->rcvd_c = 0;
2476
Willy Tarreau7838a792019-08-12 18:42:03 +02002477 out:
2478 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002479 return ret;
2480}
2481
2482/* try to send pending window update for the current dmux stream. It's safe to
2483 * call it with no pending updates. Returns > 0 on success or zero on missing
2484 * room or failure. It may return an error in h2c.
2485 */
2486static int h2c_send_strm_wu(struct h2c *h2c)
2487{
2488 int ret = 1;
2489
Willy Tarreau7838a792019-08-12 18:42:03 +02002490 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2491
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002492 if (h2c->rcvd_s <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002493 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002494
2495 /* send WU for the stream */
2496 ret = h2c_send_window_update(h2c, h2c->dsi, h2c->rcvd_s);
2497 if (ret > 0)
2498 h2c->rcvd_s = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002499 out:
2500 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002501 return ret;
2502}
2503
Willy Tarreaucf68c782017-10-10 17:11:41 +02002504/* try to send an ACK for a ping frame on the connection. Returns > 0 on
2505 * success, 0 on missing data or one of the h2_status values.
2506 */
2507static int h2c_ack_ping(struct h2c *h2c)
2508{
2509 struct buffer *res;
2510 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02002511 int ret = 0;
2512
2513 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002514
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002515 if (b_data(&h2c->dbuf) < 8)
Willy Tarreau7838a792019-08-12 18:42:03 +02002516 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002517
2518 if (h2c_mux_busy(h2c, NULL)) {
2519 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002520 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002521 }
2522
Willy Tarreaucf68c782017-10-10 17:11:41 +02002523 memcpy(str,
2524 "\x00\x00\x08" /* length : 8 (same payload) */
2525 "\x06" "\x01" /* type : 6, flags : ACK */
2526 "\x00\x00\x00\x00" /* stream ID */, 9);
2527
2528 /* copy the original payload */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002529 h2_get_buf_bytes(str + 9, 8, &h2c->dbuf, 0);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002530
Willy Tarreau9c218e72019-05-26 10:08:28 +02002531 res = br_tail(h2c->mbuf);
2532 retry:
2533 if (!h2_get_buf(h2c, res)) {
2534 h2c->flags |= H2_CF_MUX_MALLOC;
2535 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002536 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02002537 }
2538
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002539 ret = b_istput(res, ist2(str, 17));
Willy Tarreaucf68c782017-10-10 17:11:41 +02002540 if (unlikely(ret <= 0)) {
2541 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002542 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2543 goto retry;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002544 h2c->flags |= H2_CF_MUX_MFULL;
2545 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002546 }
2547 else {
2548 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002549 ret = 0;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002550 }
2551 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002552 out:
2553 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002554 return ret;
2555}
2556
Willy Tarreau26f95952017-07-27 17:18:30 +02002557/* processes a WINDOW_UPDATE frame whose payload is <payload> for <plen> bytes.
2558 * Returns > 0 on success or zero on missing data. It may return an error in
Willy Tarreaub860c732019-01-30 15:39:55 +01002559 * h2c or h2s. The caller must have already verified frame length and stream ID
2560 * validity. Described in RFC7540#6.9.
Willy Tarreau26f95952017-07-27 17:18:30 +02002561 */
2562static int h2c_handle_window_update(struct h2c *h2c, struct h2s *h2s)
2563{
2564 int32_t inc;
2565 int error;
2566
Willy Tarreau7838a792019-08-12 18:42:03 +02002567 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
2568
Willy Tarreau26f95952017-07-27 17:18:30 +02002569 /* process full frame only */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002570 if (b_data(&h2c->dbuf) < h2c->dfl) {
2571 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002572 goto out0;
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002573 }
Willy Tarreau26f95952017-07-27 17:18:30 +02002574
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002575 inc = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau26f95952017-07-27 17:18:30 +02002576
2577 if (h2c->dsi != 0) {
2578 /* stream window update */
Willy Tarreau26f95952017-07-27 17:18:30 +02002579
2580 /* it's not an error to receive WU on a closed stream */
2581 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau7838a792019-08-12 18:42:03 +02002582 goto done;
Willy Tarreau26f95952017-07-27 17:18:30 +02002583
2584 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002585 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 +02002586 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002587 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002588 goto strm_err;
2589 }
2590
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002591 if (h2s_mws(h2s) >= 0 && h2s_mws(h2s) + inc < 0) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002592 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 +02002593 error = H2_ERR_FLOW_CONTROL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002594 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002595 goto strm_err;
2596 }
2597
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002598 h2s->sws += inc;
2599 if (h2s_mws(h2s) > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002600 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002601 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002602 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2603 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreau2b718102021-04-21 07:32:39 +02002604 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreau26f95952017-07-27 17:18:30 +02002605 }
2606 }
2607 else {
2608 /* connection window update */
2609 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002610 TRACE_ERROR("conn WINDOW_UPDATE inc=0", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002611 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002612 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002613 goto conn_err;
2614 }
2615
2616 if (h2c->mws >= 0 && h2c->mws + inc < 0) {
2617 error = H2_ERR_FLOW_CONTROL_ERROR;
2618 goto conn_err;
2619 }
2620
2621 h2c->mws += inc;
2622 }
2623
Willy Tarreau7838a792019-08-12 18:42:03 +02002624 done:
2625 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002626 return 1;
2627
2628 conn_err:
2629 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002630 out0:
2631 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 +02002632 return 0;
2633
2634 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002635 h2s_error(h2s, error);
2636 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002637 TRACE_DEVEL("leaving on stream error", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002638 return 0;
2639}
2640
Willy Tarreaue96b0922017-10-30 00:28:29 +01002641/* processes a GOAWAY frame, and signals all streams whose ID is greater than
Willy Tarreaub860c732019-01-30 15:39:55 +01002642 * the last ID. Returns > 0 on success or zero on missing data. The caller must
2643 * have already verified frame length and stream ID validity. Described in
2644 * RFC7540#6.8.
Willy Tarreaue96b0922017-10-30 00:28:29 +01002645 */
2646static int h2c_handle_goaway(struct h2c *h2c)
2647{
Willy Tarreaue96b0922017-10-30 00:28:29 +01002648 int last;
2649
Willy Tarreau7838a792019-08-12 18:42:03 +02002650 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002651 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002652 if (b_data(&h2c->dbuf) < h2c->dfl) {
2653 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002654 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002655 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002656 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01002657
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002658 last = h2_get_n32(&h2c->dbuf, 0);
2659 h2c->errcode = h2_get_n32(&h2c->dbuf, 4);
Willy Tarreau11cc2d62017-12-03 10:27:47 +01002660 if (h2c->last_sid < 0)
2661 h2c->last_sid = last;
Willy Tarreau23482912019-05-07 15:23:14 +02002662 h2_wake_some_streams(h2c, last);
Willy Tarreau7838a792019-08-12 18:42:03 +02002663 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002664 return 1;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002665}
2666
Willy Tarreau92153fc2017-12-03 19:46:19 +01002667/* processes a PRIORITY frame, and either skips it or rejects if it is
Willy Tarreaub860c732019-01-30 15:39:55 +01002668 * invalid. Returns > 0 on success or zero on missing data. It may return an
2669 * error in h2c. The caller must have already verified frame length and stream
2670 * ID validity. Described in RFC7540#6.3.
Willy Tarreau92153fc2017-12-03 19:46:19 +01002671 */
2672static int h2c_handle_priority(struct h2c *h2c)
2673{
Willy Tarreau7838a792019-08-12 18:42:03 +02002674 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
2675
Willy Tarreau92153fc2017-12-03 19:46:19 +01002676 /* process full frame only */
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002677 if (b_data(&h2c->dbuf) < h2c->dfl) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002678 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002679 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002680 return 0;
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002681 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01002682
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002683 if (h2_get_n32(&h2c->dbuf, 0) == h2c->dsi) {
Willy Tarreau92153fc2017-12-03 19:46:19 +01002684 /* 7540#5.3 : can't depend on itself */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002685 TRACE_ERROR("PRIORITY depends on itself", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002686 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02002687 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002688 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002689 return 0;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002690 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002691 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002692 return 1;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002693}
2694
Willy Tarreaucd234e92017-08-18 10:59:39 +02002695/* processes an RST_STREAM frame, and sets the 32-bit error code on the stream.
Willy Tarreaub860c732019-01-30 15:39:55 +01002696 * Returns > 0 on success or zero on missing data. The caller must have already
2697 * verified frame length and stream ID validity. Described in RFC7540#6.4.
Willy Tarreaucd234e92017-08-18 10:59:39 +02002698 */
2699static int h2c_handle_rst_stream(struct h2c *h2c, struct h2s *h2s)
2700{
Willy Tarreau7838a792019-08-12 18:42:03 +02002701 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
2702
Willy Tarreaucd234e92017-08-18 10:59:39 +02002703 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002704 if (b_data(&h2c->dbuf) < h2c->dfl) {
2705 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 +02002706 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002707 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002708 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002709
2710 /* late RST, already handled */
Willy Tarreau7838a792019-08-12 18:42:03 +02002711 if (h2s->st == H2_SS_CLOSED) {
2712 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 +02002713 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002714 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002715
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002716 h2s->errcode = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau00dd0782018-03-01 16:31:34 +01002717 h2s_close(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002718
2719 if (h2s->cs) {
Willy Tarreauec988c72018-12-19 18:00:29 +01002720 cs_set_error(h2s->cs);
Willy Tarreauf830f012018-12-19 17:44:55 +01002721 h2s_alert(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002722 }
2723
2724 h2s->flags |= H2_SF_RST_RCVD;
Willy Tarreau7838a792019-08-12 18:42:03 +02002725 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002726 return 1;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002727}
2728
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002729/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2730 * It may return an error in h2c or h2s. The caller must consider that the
2731 * return value is the new h2s in case one was allocated (most common case).
2732 * Described in RFC7540#6.2. Most of the
Willy Tarreau13278b42017-10-13 19:23:14 +02002733 * errors here are reported as connection errors since it's impossible to
2734 * recover from such errors after the compression context has been altered.
2735 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002736static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau13278b42017-10-13 19:23:14 +02002737{
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002738 struct buffer rxbuf = BUF_NULL;
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002739 unsigned long long body_len = 0;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002740 uint32_t flags = 0;
Willy Tarreau13278b42017-10-13 19:23:14 +02002741 int error;
2742
Willy Tarreau7838a792019-08-12 18:42:03 +02002743 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2744
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002745 if (!b_size(&h2c->dbuf)) {
2746 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002747 goto out; // empty buffer
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002748 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002749
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002750 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2751 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002752 goto out; // incomplete frame
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002753 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002754
2755 /* now either the frame is complete or the buffer is complete */
2756 if (h2s->st != H2_SS_IDLE) {
Willy Tarreau88d138e2019-01-02 19:38:14 +01002757 /* The stream exists/existed, this must be a trailers frame */
2758 if (h2s->st != H2_SS_CLOSED) {
Amaury Denoyelle74162742020-12-11 17:53:05 +01002759 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &body_len, NULL);
Willy Tarreauaab1a602019-05-06 11:12:18 +02002760 /* unrecoverable error ? */
Willy Tarreau8c05c692023-01-19 23:58:11 +01002761 if (h2c->st0 >= H2_CS_ERROR) {
2762 TRACE_USER("Unrecoverable error decoding H2 trailers", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn, 0, &rxbuf);
Willy Tarreau3f9e0402023-01-19 23:22:03 +01002763 sess_log(h2c->conn->owner);
Willy Tarreauaab1a602019-05-06 11:12:18 +02002764 goto out;
Willy Tarreau8c05c692023-01-19 23:58:11 +01002765 }
Willy Tarreauaab1a602019-05-06 11:12:18 +02002766
Christopher Faulet0de3f552021-10-08 08:56:00 +02002767 if (error == 0) {
2768 /* Demux not blocked because of the stream, it is an incomplete frame */
2769 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2770 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002771 goto out; // missing data
Christopher Faulet0de3f552021-10-08 08:56:00 +02002772 }
Willy Tarreauaab1a602019-05-06 11:12:18 +02002773
2774 if (error < 0) {
2775 /* Failed to decode this frame (e.g. too large request)
2776 * but the HPACK decompressor is still synchronized.
2777 */
Willy Tarreau3f9e0402023-01-19 23:22:03 +01002778 sess_log(h2c->conn->owner);
Willy Tarreauaab1a602019-05-06 11:12:18 +02002779 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
Willy Tarreau8c05c692023-01-19 23:58:11 +01002780 TRACE_USER("Stream error decoding H2 trailers", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn, 0, &rxbuf);
Willy Tarreauaab1a602019-05-06 11:12:18 +02002781 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau88d138e2019-01-02 19:38:14 +01002782 goto out;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002783 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01002784 goto done;
2785 }
Willy Tarreau1f035502019-01-30 11:44:07 +01002786 /* the connection was already killed by an RST, let's consume
2787 * the data and send another RST.
2788 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01002789 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Willy Tarreau3f9e0402023-01-19 23:22:03 +01002790 sess_log(h2c->conn->owner);
Willy Tarreau1f035502019-01-30 11:44:07 +01002791 h2s = (struct h2s*)h2_error_stream;
2792 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002793 }
2794 else if (h2c->dsi <= h2c->max_id || !(h2c->dsi & 1)) {
2795 /* RFC7540#5.1.1 stream id > prev ones, and must be odd here */
2796 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002797 TRACE_ERROR("HEADERS on invalid stream ID", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau4781b152021-04-06 13:53:36 +02002798 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau22de8d32018-09-05 19:55:58 +02002799 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02002800 goto conn_err;
2801 }
Willy Tarreau415b1ee2019-01-02 13:59:43 +01002802 else if (h2c->flags & H2_CF_DEM_TOOMANY)
2803 goto out; // IDLE but too many cs still present
Willy Tarreau13278b42017-10-13 19:23:14 +02002804
Amaury Denoyelle74162742020-12-11 17:53:05 +01002805 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002806
Willy Tarreau25919232019-01-03 14:48:18 +01002807 /* unrecoverable error ? */
Willy Tarreau8c05c692023-01-19 23:58:11 +01002808 if (h2c->st0 >= H2_CS_ERROR) {
2809 TRACE_USER("Unrecoverable error decoding H2 request", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn, 0, &rxbuf);
Willy Tarreau3f9e0402023-01-19 23:22:03 +01002810 sess_log(h2c->conn->owner);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002811 goto out;
Willy Tarreau8c05c692023-01-19 23:58:11 +01002812 }
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002813
Willy Tarreau25919232019-01-03 14:48:18 +01002814 if (error <= 0) {
Christopher Faulet0de3f552021-10-08 08:56:00 +02002815 if (error == 0) {
2816 /* Demux not blocked because of the stream, it is an incomplete frame */
2817 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2818 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau25919232019-01-03 14:48:18 +01002819 goto out; // missing data
Christopher Faulet0de3f552021-10-08 08:56:00 +02002820 }
Willy Tarreau25919232019-01-03 14:48:18 +01002821
2822 /* Failed to decode this stream (e.g. too large request)
2823 * but the HPACK decompressor is still synchronized.
2824 */
Willy Tarreau3f9e0402023-01-19 23:22:03 +01002825 sess_log(h2c->conn->owner);
Willy Tarreau25919232019-01-03 14:48:18 +01002826 h2s = (struct h2s*)h2_error_stream;
2827 goto send_rst;
2828 }
2829
Willy Tarreau3c10d512021-06-17 08:29:14 +02002830 TRACE_USER("rcvd H2 request ", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW, h2c->conn, 0, &rxbuf);
2831
Willy Tarreauca45e442022-05-12 09:08:51 +02002832 /* Now we cannot roll back and we won't come back here anymore for this
2833 * stream, this stream ID is open.
2834 */
2835 if (h2c->dsi > h2c->max_id)
2836 h2c->max_id = h2c->dsi;
2837
Willy Tarreau22de8d32018-09-05 19:55:58 +02002838 /* Note: we don't emit any other logs below because ff we return
Willy Tarreaua8e49542018-10-03 18:53:55 +02002839 * positively from h2c_frt_stream_new(), the stream will report the error,
2840 * and if we return in error, h2c_frt_stream_new() will emit the error.
Christopher Faulet7d013e72020-12-15 16:56:50 +01002841 *
2842 * Xfer the rxbuf to the stream. On success, the new stream owns the
2843 * rxbuf. On error, it is released here.
Willy Tarreau22de8d32018-09-05 19:55:58 +02002844 */
Amaury Denoyelleee7fcd52021-10-18 14:45:49 +02002845 h2s = h2c_frt_stream_new(h2c, h2c->dsi, &rxbuf, flags);
Willy Tarreau13278b42017-10-13 19:23:14 +02002846 if (!h2s) {
Willy Tarreau96a10c22018-12-23 18:30:44 +01002847 h2s = (struct h2s*)h2_refused_stream;
2848 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002849 }
2850
2851 h2s->st = H2_SS_OPEN;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002852 h2s->flags |= flags;
Willy Tarreau1915ca22019-01-24 11:49:37 +01002853 h2s->body_len = body_len;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002854
Willy Tarreau88d138e2019-01-02 19:38:14 +01002855 done:
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002856 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau13278b42017-10-13 19:23:14 +02002857 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002858
2859 if (h2s->flags & H2_SF_ES_RCVD) {
Willy Tarreaufc10f592019-01-30 19:28:32 +01002860 if (h2s->st == H2_SS_OPEN)
2861 h2s->st = H2_SS_HREM;
2862 else
2863 h2s_close(h2s);
Willy Tarreau13278b42017-10-13 19:23:14 +02002864 }
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002865 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002866
2867 conn_err:
2868 h2c_error(h2c, error);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002869 goto out;
Willy Tarreau13278b42017-10-13 19:23:14 +02002870
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002871 out:
2872 h2_release_buf(h2c, &rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002873 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 +01002874 return NULL;
Willy Tarreau96a10c22018-12-23 18:30:44 +01002875
2876 send_rst:
2877 /* make the demux send an RST for the current stream. We may only
2878 * do this if we're certain that the HEADERS frame was properly
2879 * decompressed so that the HPACK decoder is still kept up to date.
2880 */
2881 h2_release_buf(h2c, &rxbuf);
2882 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002883
Willy Tarreau022e5e52020-09-10 09:33:15 +02002884 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 +02002885 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau96a10c22018-12-23 18:30:44 +01002886 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002887}
2888
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002889/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2890 * It may return an error in h2c or h2s. Described in RFC7540#6.2. Most of the
2891 * errors here are reported as connection errors since it's impossible to
2892 * recover from such errors after the compression context has been altered.
2893 */
2894static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
2895{
Christopher Faulet6884aa32019-09-23 15:28:20 +02002896 struct buffer rxbuf = BUF_NULL;
2897 unsigned long long body_len = 0;
2898 uint32_t flags = 0;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002899 int error;
2900
Willy Tarreau7838a792019-08-12 18:42:03 +02002901 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2902
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002903 if (!b_size(&h2c->dbuf)) {
2904 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002905 goto fail; // empty buffer
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002906 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002907
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002908 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2909 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002910 goto fail; // incomplete frame
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002911 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002912
Christopher Faulet6884aa32019-09-23 15:28:20 +02002913 if (h2s->st != H2_SS_CLOSED) {
Amaury Denoyelle74162742020-12-11 17:53:05 +01002914 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &h2s->body_len, h2s->upgrade_protocol);
Christopher Faulet6884aa32019-09-23 15:28:20 +02002915 }
2916 else {
2917 /* the connection was already killed by an RST, let's consume
2918 * the data and send another RST.
2919 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01002920 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Christopher Fauletea7a7782019-09-26 16:19:13 +02002921 h2s = (struct h2s*)h2_error_stream;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002922 h2c->st0 = H2_CS_FRAME_E;
2923 goto send_rst;
2924 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002925
Willy Tarreau25919232019-01-03 14:48:18 +01002926 /* unrecoverable error ? */
Willy Tarreau8c05c692023-01-19 23:58:11 +01002927 if (h2c->st0 >= H2_CS_ERROR) {
2928 TRACE_USER("Unrecoverable error decoding H2 HEADERS", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002929 goto fail;
Willy Tarreau8c05c692023-01-19 23:58:11 +01002930 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002931
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002932 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2933 /* RFC7540#5.1 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002934 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 +01002935 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2936 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau4781b152021-04-06 13:53:36 +02002937 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002938 goto fail;
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002939 }
2940
Willy Tarreau25919232019-01-03 14:48:18 +01002941 if (error <= 0) {
Christopher Faulet0de3f552021-10-08 08:56:00 +02002942 if (error == 0) {
2943 /* Demux not blocked because of the stream, it is an incomplete frame */
2944 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2945 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002946 goto fail; // missing data
Christopher Faulet0de3f552021-10-08 08:56:00 +02002947 }
Willy Tarreau25919232019-01-03 14:48:18 +01002948
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002949 /* stream error : send RST_STREAM */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002950 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 +01002951 h2s_error(h2s, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002952 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau4781b152021-04-06 13:53:36 +02002953 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002954 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002955 }
2956
Christopher Fauletfa922f02019-05-07 10:55:17 +02002957 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002958 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002959
Willy Tarreau927b88b2019-03-04 08:03:25 +01002960 if (h2s->cs && h2s->cs->flags & CS_FL_ERROR && h2s->st < H2_SS_ERROR)
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002961 h2s->st = H2_SS_ERROR;
Christopher Fauletfa922f02019-05-07 10:55:17 +02002962 else if (h2s->flags & H2_SF_ES_RCVD) {
2963 if (h2s->st == H2_SS_OPEN)
2964 h2s->st = H2_SS_HREM;
2965 else if (h2s->st == H2_SS_HLOC)
2966 h2s_close(h2s);
2967 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002968
Christopher Fauletf95f8762021-01-22 11:59:07 +01002969 /* Unblock busy server h2s waiting for the response headers to validate
2970 * the tunnel establishment or the end of the response of an oborted
2971 * tunnel
2972 */
2973 if ((h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY)) == (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY) ||
2974 (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)) {
2975 TRACE_STATE("Unblock h2s blocked on tunnel establishment/abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2976 h2s->flags &= ~H2_SF_BLK_MBUSY;
2977 }
2978
Willy Tarreaucbd37e02021-06-16 18:32:42 +02002979 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 +02002980 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002981 return h2s;
Willy Tarreau7838a792019-08-12 18:42:03 +02002982 fail:
2983 TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2984 return NULL;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002985
2986 send_rst:
2987 /* make the demux send an RST for the current stream. We may only
2988 * do this if we're certain that the HEADERS frame was properly
2989 * decompressed so that the HPACK decoder is still kept up to date.
2990 */
2991 h2_release_buf(h2c, &rxbuf);
2992 h2c->st0 = H2_CS_FRAME_E;
2993
Willy Tarreau022e5e52020-09-10 09:33:15 +02002994 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 +02002995 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2996 return h2s;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002997}
2998
Willy Tarreau454f9052017-10-26 19:40:35 +02002999/* processes a DATA frame. Returns > 0 on success or zero on missing data.
3000 * It may return an error in h2c or h2s. Described in RFC7540#6.1.
3001 */
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01003002static int h2c_handle_data(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02003003{
3004 int error;
3005
Willy Tarreau7838a792019-08-12 18:42:03 +02003006 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
3007
Willy Tarreau454f9052017-10-26 19:40:35 +02003008 /* note that empty DATA frames are perfectly valid and sometimes used
3009 * to signal an end of stream (with the ES flag).
3010 */
3011
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003012 if (!b_size(&h2c->dbuf) && h2c->dfl) {
3013 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02003014 goto fail; // empty buffer
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003015 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003016
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003017 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
3018 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02003019 goto fail; // incomplete frame
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003020 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003021
3022 /* now either the frame is complete or the buffer is complete */
3023
Willy Tarreau454f9052017-10-26 19:40:35 +02003024 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
3025 /* RFC7540#6.1 */
3026 error = H2_ERR_STREAM_CLOSED;
3027 goto strm_err;
3028 }
3029
Christopher Faulet4f09ec82019-06-19 09:25:58 +02003030 if ((h2s->flags & H2_SF_DATA_CLEN) && (h2c->dfl - h2c->dpl) > h2s->body_len) {
Willy Tarreau1915ca22019-01-24 11:49:37 +01003031 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003032 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 +01003033 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02003034 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau1915ca22019-01-24 11:49:37 +01003035 goto strm_err;
3036 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01003037 if (!(h2c->flags & H2_CF_IS_BACK) &&
3038 (h2s->flags & (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT)) == (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT) &&
3039 ((h2c->dfl - h2c->dpl) || !(h2c->dff & H2_F_DATA_END_STREAM))) {
3040 /* a tunnel attempt was aborted but the client still try to send some raw data.
3041 * Thus the stream is closed with the CANCEL error. Here we take care it is not
3042 * an empty DATA Frame with the ES flag. The error is only handled if ES was
3043 * already sent to the client because depending on the scheduling, these data may
Ilya Shipitsinacf84592021-02-06 22:29:08 +05003044 * have been sent before the server response but not handle here.
Christopher Faulet91b21dc2021-01-22 12:13:15 +01003045 */
3046 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
3047 error = H2_ERR_CANCEL;
3048 goto strm_err;
3049 }
Willy Tarreau1915ca22019-01-24 11:49:37 +01003050
Willy Tarreaua56a6de2018-02-26 15:59:07 +01003051 if (!h2_frt_transfer_data(h2s))
Willy Tarreau7838a792019-08-12 18:42:03 +02003052 goto fail;
Willy Tarreaua56a6de2018-02-26 15:59:07 +01003053
Willy Tarreau454f9052017-10-26 19:40:35 +02003054 /* call the upper layers to process the frame, then let the upper layer
3055 * notify the stream about any change.
3056 */
3057 if (!h2s->cs) {
Willy Tarreau082c4572019-08-06 10:11:02 +02003058 /* The upper layer has already closed, this may happen on
3059 * 4xx/redirects during POST, or when receiving a response
3060 * from an H2 server after the client has aborted.
3061 */
3062 error = H2_ERR_CANCEL;
Willy Tarreau454f9052017-10-26 19:40:35 +02003063 goto strm_err;
3064 }
3065
Willy Tarreau8f650c32017-11-21 19:36:21 +01003066 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02003067 goto fail;
Willy Tarreau8f650c32017-11-21 19:36:21 +01003068
Willy Tarreau721c9742017-11-07 11:05:42 +01003069 if (h2s->st >= H2_SS_ERROR) {
Willy Tarreau454f9052017-10-26 19:40:35 +02003070 /* stream error : send RST_STREAM */
Willy Tarreaua20a5192017-12-27 11:02:06 +01003071 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02003072 }
3073
3074 /* check for completion : the callee will change this to FRAME_A or
3075 * FRAME_H once done.
3076 */
3077 if (h2c->st0 == H2_CS_FRAME_P)
Willy Tarreau7838a792019-08-12 18:42:03 +02003078 goto fail;
Willy Tarreau454f9052017-10-26 19:40:35 +02003079
Willy Tarreauc4134ba2017-12-11 18:45:08 +01003080 /* last frame */
3081 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02003082 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreaufc10f592019-01-30 19:28:32 +01003083 if (h2s->st == H2_SS_OPEN)
3084 h2s->st = H2_SS_HREM;
3085 else
3086 h2s_close(h2s);
3087
Willy Tarreau1915ca22019-01-24 11:49:37 +01003088 if (h2s->flags & H2_SF_DATA_CLEN && h2s->body_len) {
3089 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003090 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 +01003091 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02003092 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau1915ca22019-01-24 11:49:37 +01003093 goto strm_err;
3094 }
Willy Tarreauc4134ba2017-12-11 18:45:08 +01003095 }
3096
Christopher Fauletf95f8762021-01-22 11:59:07 +01003097 /* Unblock busy server h2s waiting for the end of the response for an
3098 * aborted tunnel
3099 */
3100 if ((h2c->flags & H2_CF_IS_BACK) &&
3101 (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)) {
3102 TRACE_STATE("Unblock h2s blocked on tunnel abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
3103 h2s->flags &= ~H2_SF_BLK_MBUSY;
3104 }
3105
Willy Tarreau7838a792019-08-12 18:42:03 +02003106 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02003107 return 1;
3108
Willy Tarreau454f9052017-10-26 19:40:35 +02003109 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01003110 h2s_error(h2s, error);
3111 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003112 fail:
3113 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 +02003114 return 0;
3115}
3116
Willy Tarreau63864812019-08-07 14:25:20 +02003117/* check that the current frame described in h2c->{dsi,dft,dfl,dff,...} is
3118 * valid for the current stream state. This is needed only after parsing the
3119 * frame header but in practice it can be performed at any time during
3120 * H2_CS_FRAME_P since no state transition happens there. Returns >0 on success
3121 * or 0 in case of error, in which case either h2s or h2c will carry an error.
3122 */
3123static int h2_frame_check_vs_state(struct h2c *h2c, struct h2s *h2s)
3124{
Willy Tarreau7838a792019-08-12 18:42:03 +02003125 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
3126
Willy Tarreau63864812019-08-07 14:25:20 +02003127 if (h2s->st == H2_SS_IDLE &&
3128 h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) {
3129 /* RFC7540#5.1: any frame other than HEADERS or PRIORITY in
3130 * this state MUST be treated as a connection error
3131 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003132 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 +02003133 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003134 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau63864812019-08-07 14:25:20 +02003135 /* only log if no other stream can report the error */
3136 sess_log(h2c->conn->owner);
3137 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003138 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02003139 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 +02003140 return 0;
3141 }
3142
Willy Tarreau57a18162019-11-24 14:57:53 +01003143 if (h2s->st == H2_SS_IDLE && (h2c->flags & H2_CF_IS_BACK)) {
3144 /* only PUSH_PROMISE would be permitted here */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003145 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 +01003146 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02003147 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau57a18162019-11-24 14:57:53 +01003148 TRACE_DEVEL("leaving in error (idle&back)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s);
3149 return 0;
3150 }
3151
Willy Tarreau63864812019-08-07 14:25:20 +02003152 if (h2s->st == H2_SS_HREM && h2c->dft != H2_FT_WINDOW_UPDATE &&
3153 h2c->dft != H2_FT_RST_STREAM && h2c->dft != H2_FT_PRIORITY) {
3154 /* RFC7540#5.1: any frame other than WU/PRIO/RST in
3155 * this state MUST be treated as a stream error.
3156 * 6.2, 6.6 and 6.10 further mandate that HEADERS/
3157 * PUSH_PROMISE/CONTINUATION cause connection errors.
3158 */
Amaury Denoyellea8879232020-10-27 17:16:03 +01003159 if (h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003160 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 +02003161 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02003162 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Amaury Denoyellea8879232020-10-27 17:16:03 +01003163 }
3164 else {
Willy Tarreau63864812019-08-07 14:25:20 +02003165 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
Amaury Denoyellea8879232020-10-27 17:16:03 +01003166 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003167 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 +02003168 return 0;
3169 }
3170
3171 /* Below the management of frames received in closed state is a
3172 * bit hackish because the spec makes strong differences between
3173 * streams closed by receiving RST, sending RST, and seeing ES
3174 * in both directions. In addition to this, the creation of a
3175 * new stream reusing the identifier of a closed one will be
3176 * detected here. Given that we cannot keep track of all closed
3177 * streams forever, we consider that unknown closed streams were
3178 * closed on RST received, which allows us to respond with an
3179 * RST without breaking the connection (eg: to abort a transfer).
3180 * Some frames have to be silently ignored as well.
3181 */
3182 if (h2s->st == H2_SS_CLOSED && h2c->dsi) {
3183 if (!(h2c->flags & H2_CF_IS_BACK) && h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
3184 /* #5.1.1: The identifier of a newly
3185 * established stream MUST be numerically
3186 * greater than all streams that the initiating
3187 * endpoint has opened or reserved. This
3188 * governs streams that are opened using a
3189 * HEADERS frame and streams that are reserved
3190 * using PUSH_PROMISE. An endpoint that
3191 * receives an unexpected stream identifier
3192 * MUST respond with a connection error.
3193 */
3194 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003195 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 +02003196 return 0;
3197 }
3198
Willy Tarreau4c08f122019-09-26 08:47:15 +02003199 if (h2s->flags & H2_SF_RST_RCVD &&
3200 !(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 +02003201 /* RFC7540#5.1:closed: an endpoint that
3202 * receives any frame other than PRIORITY after
3203 * receiving a RST_STREAM MUST treat that as a
3204 * stream error of type STREAM_CLOSED.
3205 *
3206 * Note that old streams fall into this category
3207 * and will lead to an RST being sent.
3208 *
3209 * However, we cannot generalize this to all frame types. Those
3210 * carrying compression state must still be processed before
3211 * being dropped or we'll desynchronize the decoder. This can
3212 * happen with request trailers received after sending an
3213 * RST_STREAM, or with header/trailers responses received after
3214 * sending RST_STREAM (aborted stream).
Willy Tarreau4c08f122019-09-26 08:47:15 +02003215 *
3216 * In addition, since our CLOSED streams always carry the
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003217 * RST_RCVD bit, we don't want to accidentally catch valid
Willy Tarreau4c08f122019-09-26 08:47:15 +02003218 * frames for a closed stream, i.e. RST/PRIO/WU.
Willy Tarreau63864812019-08-07 14:25:20 +02003219 */
3220 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
3221 h2c->st0 = H2_CS_FRAME_E;
Christopher Faulet6884aa32019-09-23 15:28:20 +02003222 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 +02003223 return 0;
3224 }
3225
3226 /* RFC7540#5.1:closed: if this state is reached as a
3227 * result of sending a RST_STREAM frame, the peer that
3228 * receives the RST_STREAM might have already sent
3229 * frames on the stream that cannot be withdrawn. An
3230 * endpoint MUST ignore frames that it receives on
3231 * closed streams after it has sent a RST_STREAM
3232 * frame. An endpoint MAY choose to limit the period
3233 * over which it ignores frames and treat frames that
3234 * arrive after this time as being in error.
3235 */
3236 if (h2s->id && !(h2s->flags & H2_SF_RST_SENT)) {
3237 /* RFC7540#5.1:closed: any frame other than
3238 * PRIO/WU/RST in this state MUST be treated as
3239 * a connection error
3240 */
3241 if (h2c->dft != H2_FT_RST_STREAM &&
3242 h2c->dft != H2_FT_PRIORITY &&
3243 h2c->dft != H2_FT_WINDOW_UPDATE) {
3244 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003245 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 +02003246 return 0;
3247 }
3248 }
3249 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003250 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02003251 return 1;
3252}
3253
Willy Tarreaubc933932017-10-09 16:21:43 +02003254/* process Rx frames to be demultiplexed */
3255static void h2_process_demux(struct h2c *h2c)
3256{
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003257 struct h2s *h2s = NULL, *tmp_h2s;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003258 struct h2_fh hdr;
3259 unsigned int padlen = 0;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003260 int32_t old_iw = h2c->miw;
Willy Tarreauf3ee0692017-10-17 08:18:25 +02003261
Willy Tarreau7838a792019-08-12 18:42:03 +02003262 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3263
Willy Tarreau081d4722017-05-16 21:51:05 +02003264 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02003265 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02003266
3267 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3268 if (h2c->st0 == H2_CS_PREFACE) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003269 TRACE_STATE("expecting preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02003270 if (h2c->flags & H2_CF_IS_BACK)
Willy Tarreau7838a792019-08-12 18:42:03 +02003271 goto out;
3272
Willy Tarreau52eed752017-09-22 15:05:09 +02003273 if (unlikely(h2c_frt_recv_preface(h2c) <= 0)) {
3274 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02003275 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003276 TRACE_PROTO("failed to receive preface", H2_EV_RX_PREFACE|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003277 h2c->st0 = H2_CS_ERROR2;
Willy Tarreauc23d6d12021-06-17 08:08:48 +02003278 if (b_data(&h2c->dbuf) ||
Christopher Faulet79b347d2021-07-26 10:18:35 +02003279 !(((const struct session *)h2c->conn->owner)->fe->options & (PR_O_NULLNOLOG|PR_O_IGNORE_PRB)))
Willy Tarreauc23d6d12021-06-17 08:08:48 +02003280 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02003281 }
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003282 goto done;
Willy Tarreau52eed752017-09-22 15:05:09 +02003283 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003284 TRACE_PROTO("received preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003285
3286 h2c->max_id = 0;
3287 h2c->st0 = H2_CS_SETTINGS1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003288 TRACE_STATE("switching to SETTINGS1", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003289 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003290
3291 if (h2c->st0 == H2_CS_SETTINGS1) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003292 /* ensure that what is pending is a valid SETTINGS frame
3293 * without an ACK.
3294 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003295 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 +02003296 if (!h2_get_frame_hdr(&h2c->dbuf, &hdr)) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003297 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003298 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau22de8d32018-09-05 19:55:58 +02003299 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003300 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 +02003301 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003302 if (!(h2c->flags & H2_CF_IS_BACK))
3303 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02003304 }
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003305 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003306 }
3307
3308 if (hdr.sid || hdr.ft != H2_FT_SETTINGS || hdr.ff & H2_F_SETTINGS_ACK) {
3309 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003310 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 +02003311 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
3312 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003313 if (!(h2c->flags & H2_CF_IS_BACK))
3314 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003315 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003316 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003317 }
3318
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003319 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003320 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003321 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 +02003322 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
3323 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003324 if (!(h2c->flags & H2_CF_IS_BACK))
3325 sess_log(h2c->conn->owner);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003326 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003327 }
3328
Willy Tarreau3bf69182018-12-21 15:34:50 +01003329 /* that's OK, switch to FRAME_P to process it. This is
3330 * a SETTINGS frame whose header has already been
3331 * deleted above.
3332 */
Willy Tarreau54f46e52019-01-30 15:11:03 +01003333 padlen = 0;
Willy Tarreau4781b152021-04-06 13:53:36 +02003334 HA_ATOMIC_INC(&h2c->px_counters->settings_rcvd);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003335 goto new_frame;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003336 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003337 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003338
3339 /* process as many incoming frames as possible below */
Willy Tarreau7838a792019-08-12 18:42:03 +02003340 while (1) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02003341 int ret = 0;
3342
Willy Tarreau7838a792019-08-12 18:42:03 +02003343 if (!b_data(&h2c->dbuf)) {
3344 TRACE_DEVEL("no more Rx data", H2_EV_RX_FRAME, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003345 h2c->flags |= H2_CF_DEM_SHORT_READ;
3346 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003347 }
3348
3349 if (h2c->st0 >= H2_CS_ERROR) {
3350 TRACE_STATE("end of connection reported", H2_EV_RX_FRAME|H2_EV_RX_EOI, h2c->conn);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003351 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003352 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003353
3354 if (h2c->st0 == H2_CS_FRAME_H) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003355 TRACE_STATE("expecting H2 frame header", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003356 if (!h2_peek_frame_hdr(&h2c->dbuf, 0, &hdr)) {
3357 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003358 break;
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003359 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003360
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003361 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003362 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 +02003363 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003364 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02003365 /* only log if no other stream can report the error */
3366 sess_log(h2c->conn->owner);
3367 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003368 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003369 break;
3370 }
3371
Willy Tarreau1d7138e2022-06-08 16:32:22 +02003372 if (h2c->rcvd_s && h2c->dsi != hdr.sid) {
3373 /* changed stream with a pending WU, need to
3374 * send it now.
3375 */
3376 TRACE_PROTO("sending stream WINDOW_UPDATE frame on stream switch", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
3377 ret = h2c_send_strm_wu(h2c);
3378 if (ret <= 0)
3379 break;
3380 }
3381
Christopher Fauletdd2a5622019-06-18 12:22:38 +02003382 padlen = 0;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003383 if (h2_ft_bit(hdr.ft) & H2_FT_PADDED_MASK && hdr.ff & H2_F_PADDED) {
3384 /* If the frame is padded (HEADERS, PUSH_PROMISE or DATA),
3385 * we read the pad length and drop it from the remaining
3386 * payload (one byte + the 9 remaining ones = 10 total
3387 * removed), so we have a frame payload starting after the
3388 * pad len. Flow controlled frames (DATA) also count the
3389 * padlen in the flow control, so it must be adjusted.
3390 */
3391 if (hdr.len < 1) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003392 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 +01003393 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003394 if (!(h2c->flags & H2_CF_IS_BACK))
3395 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003396 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003397 goto done;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003398 }
3399 hdr.len--;
3400
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003401 if (b_data(&h2c->dbuf) < 10) {
3402 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003403 break; // missing padlen
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003404 }
Willy Tarreau3bf69182018-12-21 15:34:50 +01003405
3406 padlen = *(uint8_t *)b_peek(&h2c->dbuf, 9);
3407
3408 if (padlen > hdr.len) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003409 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 +01003410 /* RFC7540#6.1 : pad length = length of
3411 * frame payload or greater => error.
3412 */
3413 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003414 if (!(h2c->flags & H2_CF_IS_BACK))
3415 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003416 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003417 goto done;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003418 }
3419
3420 if (h2_ft_bit(hdr.ft) & H2_FT_FC_MASK) {
3421 h2c->rcvd_c++;
3422 h2c->rcvd_s++;
3423 }
3424 b_del(&h2c->dbuf, 1);
3425 }
3426 h2_skip_frame_hdr(&h2c->dbuf);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003427
3428 new_frame:
Willy Tarreau7e98c052017-10-10 15:56:59 +02003429 h2c->dfl = hdr.len;
3430 h2c->dsi = hdr.sid;
3431 h2c->dft = hdr.ft;
3432 h2c->dff = hdr.ff;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003433 h2c->dpl = padlen;
Willy Tarreau6c3eeca2022-08-18 11:19:57 +02003434 h2c->flags |= H2_CF_DEM_IN_PROGRESS;
Willy Tarreau73db4342019-09-25 07:28:44 +02003435 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 +02003436 h2c->st0 = H2_CS_FRAME_P;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003437
3438 /* check for minimum basic frame format validity */
3439 ret = h2_frame_check(h2c->dft, 1, h2c->dsi, h2c->dfl, global.tune.bufsize);
3440 if (ret != H2_ERR_NO_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003441 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 +01003442 h2c_error(h2c, ret);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003443 if (!(h2c->flags & H2_CF_IS_BACK))
3444 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003445 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003446 goto done;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003447 }
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01003448
3449 /* transition to HEADERS frame ends the keep-alive idle
3450 * timer and starts the http-request idle delay.
3451 */
3452 if (hdr.ft == H2_FT_HEADERS)
3453 h2c->idle_start = now_ms;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003454 }
3455
Willy Tarreau9fd5aa82019-08-06 15:21:45 +02003456 /* Only H2_CS_FRAME_P, H2_CS_FRAME_A and H2_CS_FRAME_E here.
3457 * H2_CS_FRAME_P indicates an incomplete previous operation
3458 * (most often the first attempt) and requires some validity
3459 * checks for the frame and the current state. The two other
3460 * ones are set after completion (or abortion) and must skip
3461 * validity checks.
3462 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003463 tmp_h2s = h2c_st_by_id(h2c, h2c->dsi);
3464
Willy Tarreau567beb82018-12-18 16:52:44 +01003465 if (tmp_h2s != h2s && h2s && h2s->cs &&
3466 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003467 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003468 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003469 (h2s->flags & H2_SF_ES_RCVD) ||
3470 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003471 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003472 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 +01003473 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003474 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003475 }
3476 h2s = tmp_h2s;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003477
Willy Tarreau63864812019-08-07 14:25:20 +02003478 if (h2c->st0 == H2_CS_FRAME_E ||
Willy Tarreau7838a792019-08-12 18:42:03 +02003479 (h2c->st0 == H2_CS_FRAME_P && !h2_frame_check_vs_state(h2c, h2s))) {
3480 TRACE_PROTO("stream error reported", H2_EV_RX_FRAME|H2_EV_PROTO_ERR, h2c->conn, h2s);
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003481 goto strm_err;
Willy Tarreau7838a792019-08-12 18:42:03 +02003482 }
Willy Tarreauc0da1962017-10-30 18:38:00 +01003483
Willy Tarreau7e98c052017-10-10 15:56:59 +02003484 switch (h2c->dft) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02003485 case H2_FT_SETTINGS:
Willy Tarreau7838a792019-08-12 18:42:03 +02003486 if (h2c->st0 == H2_CS_FRAME_P) {
3487 TRACE_PROTO("receiving H2 SETTINGS frame", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn, h2s);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003488 ret = h2c_handle_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003489 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003490 HA_ATOMIC_INC(&h2c->px_counters->settings_rcvd);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003491
Willy Tarreau7838a792019-08-12 18:42:03 +02003492 if (h2c->st0 == H2_CS_FRAME_A) {
3493 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 +02003494 ret = h2c_ack_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003495 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003496 break;
3497
Willy Tarreaucf68c782017-10-10 17:11:41 +02003498 case H2_FT_PING:
Willy Tarreau7838a792019-08-12 18:42:03 +02003499 if (h2c->st0 == H2_CS_FRAME_P) {
3500 TRACE_PROTO("receiving H2 PING frame", H2_EV_RX_FRAME|H2_EV_RX_PING, h2c->conn, h2s);
Willy Tarreaucf68c782017-10-10 17:11:41 +02003501 ret = h2c_handle_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003502 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003503
Willy Tarreau7838a792019-08-12 18:42:03 +02003504 if (h2c->st0 == H2_CS_FRAME_A) {
3505 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 +02003506 ret = h2c_ack_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003507 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003508 break;
3509
Willy Tarreau26f95952017-07-27 17:18:30 +02003510 case H2_FT_WINDOW_UPDATE:
Willy Tarreau7838a792019-08-12 18:42:03 +02003511 if (h2c->st0 == H2_CS_FRAME_P) {
3512 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 +02003513 ret = h2c_handle_window_update(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003514 }
Willy Tarreau26f95952017-07-27 17:18:30 +02003515 break;
3516
Willy Tarreau61290ec2017-10-17 08:19:21 +02003517 case H2_FT_CONTINUATION:
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003518 /* RFC7540#6.10: CONTINUATION may only be preceded by
Willy Tarreauea18f862018-12-22 20:19:26 +01003519 * a HEADERS/PUSH_PROMISE/CONTINUATION frame. These
3520 * frames' parsers consume all following CONTINUATION
3521 * frames so this one is out of sequence.
Willy Tarreau61290ec2017-10-17 08:19:21 +02003522 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003523 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 +01003524 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003525 if (!(h2c->flags & H2_CF_IS_BACK))
3526 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003527 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003528 goto done;
Willy Tarreau61290ec2017-10-17 08:19:21 +02003529
Willy Tarreau13278b42017-10-13 19:23:14 +02003530 case H2_FT_HEADERS:
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003531 if (h2c->st0 == H2_CS_FRAME_P) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003532 TRACE_PROTO("receiving H2 HEADERS frame", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02003533 if (h2c->flags & H2_CF_IS_BACK)
3534 tmp_h2s = h2c_bck_handle_headers(h2c, h2s);
3535 else
3536 tmp_h2s = h2c_frt_handle_headers(h2c, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003537 if (tmp_h2s) {
3538 h2s = tmp_h2s;
3539 ret = 1;
3540 }
3541 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003542 HA_ATOMIC_INC(&h2c->px_counters->headers_rcvd);
Willy Tarreau13278b42017-10-13 19:23:14 +02003543 break;
3544
Willy Tarreau454f9052017-10-26 19:40:35 +02003545 case H2_FT_DATA:
Willy Tarreau7838a792019-08-12 18:42:03 +02003546 if (h2c->st0 == H2_CS_FRAME_P) {
3547 TRACE_PROTO("receiving H2 DATA frame", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01003548 ret = h2c_handle_data(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003549 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003550 HA_ATOMIC_INC(&h2c->px_counters->data_rcvd);
Willy Tarreau454f9052017-10-26 19:40:35 +02003551
Willy Tarreau7838a792019-08-12 18:42:03 +02003552 if (h2c->st0 == H2_CS_FRAME_A) {
Willy Tarreau1d7138e2022-06-08 16:32:22 +02003553 /* rcvd_s will suffice to trigger the sending of a WU */
3554 h2c->st0 = H2_CS_FRAME_H;
Willy Tarreau7838a792019-08-12 18:42:03 +02003555 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003556 break;
Willy Tarreaucd234e92017-08-18 10:59:39 +02003557
Willy Tarreau92153fc2017-12-03 19:46:19 +01003558 case H2_FT_PRIORITY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003559 if (h2c->st0 == H2_CS_FRAME_P) {
3560 TRACE_PROTO("receiving H2 PRIORITY frame", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn, h2s);
Willy Tarreau92153fc2017-12-03 19:46:19 +01003561 ret = h2c_handle_priority(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003562 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01003563 break;
3564
Willy Tarreaucd234e92017-08-18 10:59:39 +02003565 case H2_FT_RST_STREAM:
Willy Tarreau7838a792019-08-12 18:42:03 +02003566 if (h2c->st0 == H2_CS_FRAME_P) {
3567 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 +02003568 ret = h2c_handle_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003569 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003570 HA_ATOMIC_INC(&h2c->px_counters->rst_stream_rcvd);
Willy Tarreaucd234e92017-08-18 10:59:39 +02003571 break;
3572
Willy Tarreaue96b0922017-10-30 00:28:29 +01003573 case H2_FT_GOAWAY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003574 if (h2c->st0 == H2_CS_FRAME_P) {
3575 TRACE_PROTO("receiving H2 GOAWAY frame", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn, h2s);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003576 ret = h2c_handle_goaway(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003577 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003578 HA_ATOMIC_INC(&h2c->px_counters->goaway_rcvd);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003579 break;
3580
Willy Tarreau1c661982017-10-30 13:52:01 +01003581 /* implement all extra frame types here */
Willy Tarreau7e98c052017-10-10 15:56:59 +02003582 default:
Willy Tarreau7838a792019-08-12 18:42:03 +02003583 TRACE_PROTO("receiving H2 ignored frame", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003584 /* drop frames that we ignore. They may be larger than
3585 * the buffer so we drain all of their contents until
3586 * we reach the end.
3587 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003588 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3589 b_del(&h2c->dbuf, ret);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003590 h2c->dfl -= ret;
3591 ret = h2c->dfl == 0;
3592 }
3593
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003594 strm_err:
Willy Tarreaua20a5192017-12-27 11:02:06 +01003595 /* We may have to send an RST if not done yet */
Willy Tarreau7838a792019-08-12 18:42:03 +02003596 if (h2s->st == H2_SS_ERROR) {
3597 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 +01003598 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003599 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003600
Willy Tarreau7838a792019-08-12 18:42:03 +02003601 if (h2c->st0 == H2_CS_FRAME_E) {
3602 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 +01003603 ret = h2c_send_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003604 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003605
Willy Tarreau7e98c052017-10-10 15:56:59 +02003606 /* error or missing data condition met above ? */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003607 if (ret <= 0)
Willy Tarreau7e98c052017-10-10 15:56:59 +02003608 break;
3609
3610 if (h2c->st0 != H2_CS_FRAME_H) {
Willy Tarreaubba7a4d2020-09-18 07:41:28 +02003611 if (h2c->dfl)
3612 TRACE_DEVEL("skipping remaining frame payload", H2_EV_RX_FRAME, h2c->conn, h2s);
Christopher Faulet5112a602019-09-26 16:38:28 +02003613 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3614 b_del(&h2c->dbuf, ret);
3615 h2c->dfl -= ret;
3616 if (!h2c->dfl) {
Willy Tarreau6c3eeca2022-08-18 11:19:57 +02003617 h2c->flags &= ~H2_CF_DEM_IN_PROGRESS;
Christopher Faulet5112a602019-09-26 16:38:28 +02003618 TRACE_STATE("switching to FRAME_H", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
3619 h2c->st0 = H2_CS_FRAME_H;
Christopher Faulet5112a602019-09-26 16:38:28 +02003620 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003621 }
3622 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003623
Willy Tarreau1d7138e2022-06-08 16:32:22 +02003624 if (h2c->rcvd_s > 0 &&
3625 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))) {
3626 TRACE_PROTO("sending stream WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn, h2s);
3627 h2c_send_strm_wu(h2c);
3628 }
3629
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003630 if (h2c->rcvd_c > 0 &&
Willy Tarreau7838a792019-08-12 18:42:03 +02003631 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))) {
3632 TRACE_PROTO("sending H2 WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003633 h2c_send_conn_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003634 }
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003635
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003636 done:
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003637 if (h2c->st0 >= H2_CS_ERROR || (h2c->flags & H2_CF_DEM_SHORT_READ)) {
3638 if (h2c->flags & H2_CF_RCVD_SHUT)
3639 h2c->flags |= H2_CF_END_REACHED;
3640 }
3641
Willy Tarreau567beb82018-12-18 16:52:44 +01003642 if (h2s && h2s->cs &&
3643 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003644 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003645 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003646 (h2s->flags & H2_SF_ES_RCVD) ||
3647 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003648 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003649 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 +01003650 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003651 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003652 }
Willy Tarreau1ed87b72018-11-25 08:45:16 +01003653
Willy Tarreau7838a792019-08-12 18:42:03 +02003654 if (old_iw != h2c->miw) {
3655 TRACE_STATE("notifying streams about SFCTL increase", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003656 h2c_unblock_sfctl(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003657 }
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003658
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003659 h2c_restart_reading(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02003660 out:
3661 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003662 return;
Willy Tarreaubc933932017-10-09 16:21:43 +02003663}
3664
Willy Tarreau989539b2020-01-10 17:01:29 +01003665/* resume each h2s eligible for sending in list head <head> */
3666static void h2_resume_each_sending_h2s(struct h2c *h2c, struct list *head)
3667{
3668 struct h2s *h2s, *h2s_back;
3669
3670 TRACE_ENTER(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3671
3672 list_for_each_entry_safe(h2s, h2s_back, head, list) {
3673 if (h2c->mws <= 0 ||
3674 h2c->flags & H2_CF_MUX_BLOCK_ANY ||
3675 h2c->st0 >= H2_CS_ERROR)
3676 break;
3677
3678 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003679
Willy Tarreaud9464162020-01-10 18:25:07 +01003680 if (h2s->flags & H2_SF_NOTIFIED)
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003681 continue;
3682
Willy Tarreau5723f292020-01-10 15:16:57 +01003683 /* If the sender changed his mind and unsubscribed, let's just
3684 * remove the stream from the send_list.
Willy Tarreau989539b2020-01-10 17:01:29 +01003685 */
Willy Tarreauf96508a2020-01-10 11:12:48 +01003686 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) &&
3687 (!h2s->subs || !(h2s->subs->events & SUB_RETRY_SEND))) {
Willy Tarreau989539b2020-01-10 17:01:29 +01003688 LIST_DEL_INIT(&h2s->list);
3689 continue;
3690 }
3691
Willy Tarreauf96508a2020-01-10 11:12:48 +01003692 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau5723f292020-01-10 15:16:57 +01003693 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01003694 tasklet_wakeup(h2s->subs->tasklet);
3695 h2s->subs->events &= ~SUB_RETRY_SEND;
3696 if (!h2s->subs->events)
3697 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01003698 }
3699 else if (h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) {
3700 tasklet_wakeup(h2s->shut_tl);
3701 }
Willy Tarreau989539b2020-01-10 17:01:29 +01003702 }
3703
3704 TRACE_LEAVE(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3705}
3706
Willy Tarreaubc933932017-10-09 16:21:43 +02003707/* process Tx frames from streams to be multiplexed. Returns > 0 if it reached
3708 * the end.
3709 */
3710static int h2_process_mux(struct h2c *h2c)
3711{
Willy Tarreau7838a792019-08-12 18:42:03 +02003712 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3713
Willy Tarreau01b44822018-10-03 14:26:37 +02003714 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3715 if (unlikely(h2c->st0 == H2_CS_PREFACE && (h2c->flags & H2_CF_IS_BACK))) {
3716 if (unlikely(h2c_bck_send_preface(h2c) <= 0)) {
3717 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003718 if (h2c->st0 == H2_CS_ERROR)
Willy Tarreau01b44822018-10-03 14:26:37 +02003719 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau01b44822018-10-03 14:26:37 +02003720 goto fail;
3721 }
3722 h2c->st0 = H2_CS_SETTINGS1;
3723 }
3724 /* need to wait for the other side */
Willy Tarreau75a930a2018-12-12 08:03:58 +01003725 if (h2c->st0 < H2_CS_FRAME_H)
Willy Tarreau7838a792019-08-12 18:42:03 +02003726 goto done;
Willy Tarreau01b44822018-10-03 14:26:37 +02003727 }
3728
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003729 /* start by sending possibly pending window updates */
Willy Tarreaue74679a2019-08-06 15:39:32 +02003730 if (h2c->rcvd_s > 0 &&
3731 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3732 h2c_send_strm_wu(h2c) < 0)
3733 goto fail;
3734
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003735 if (h2c->rcvd_c > 0 &&
3736 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3737 h2c_send_conn_wu(h2c) < 0)
3738 goto fail;
3739
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003740 /* First we always process the flow control list because the streams
3741 * waiting there were already elected for immediate emission but were
3742 * blocked just on this.
3743 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003744 h2_resume_each_sending_h2s(h2c, &h2c->fctl_list);
3745 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003746
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003747 fail:
Willy Tarreau3eabe9b2017-11-07 11:03:01 +01003748 if (unlikely(h2c->st0 >= H2_CS_ERROR)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02003749 if (h2c->st0 == H2_CS_ERROR) {
3750 if (h2c->max_id >= 0) {
3751 h2c_send_goaway_error(h2c, NULL);
3752 if (h2c->flags & H2_CF_MUX_BLOCK_ANY)
Willy Tarreau7838a792019-08-12 18:42:03 +02003753 goto out0;
Willy Tarreau081d4722017-05-16 21:51:05 +02003754 }
3755
3756 h2c->st0 = H2_CS_ERROR2; // sent (or failed hard) !
3757 }
Willy Tarreau081d4722017-05-16 21:51:05 +02003758 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003759 done:
3760 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
3761 return 1;
3762 out0:
3763 TRACE_DEVEL("leaving in blocked situation", H2_EV_H2C_WAKE, h2c->conn);
3764 return 0;
Willy Tarreaubc933932017-10-09 16:21:43 +02003765}
3766
Willy Tarreau62f52692017-10-08 23:01:42 +02003767
Willy Tarreau479998a2018-11-18 06:30:59 +01003768/* Attempt to read data, and subscribe if none available.
3769 * The function returns 1 if data has been received, otherwise zero.
3770 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003771static int h2_recv(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003772{
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003773 struct connection *conn = h2c->conn;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003774 struct buffer *buf;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003775 int max;
Olivier Houchard7505f942018-08-21 18:10:44 +02003776 size_t ret;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003777
Willy Tarreau7838a792019-08-12 18:42:03 +02003778 TRACE_ENTER(H2_EV_H2C_RECV, h2c->conn);
3779
3780 if (h2c->wait_event.events & SUB_RETRY_RECV) {
3781 TRACE_DEVEL("leaving on sub_recv", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003782 return (b_data(&h2c->dbuf));
Willy Tarreau7838a792019-08-12 18:42:03 +02003783 }
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003784
Willy Tarreau7838a792019-08-12 18:42:03 +02003785 if (!h2_recv_allowed(h2c)) {
3786 TRACE_DEVEL("leaving on !recv_allowed", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003787 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003788 }
Willy Tarreaua2af5122017-10-09 11:56:46 +02003789
Willy Tarreau44e973f2018-03-01 17:49:30 +01003790 buf = h2_get_buf(h2c, &h2c->dbuf);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003791 if (!buf) {
3792 h2c->flags |= H2_CF_DEM_DALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02003793 TRACE_DEVEL("leaving on !alloc", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003794 return 0;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003795 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003796
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003797 if (h2c->flags & H2_CF_RCVD_SHUT) {
3798 TRACE_DEVEL("leaving on rcvd_shut", H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau49acac02021-11-19 11:41:10 +01003799 return 1;
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003800 }
3801
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003802 if (!b_data(buf)) {
3803 /* try to pre-align the buffer like the
3804 * rxbufs will be to optimize memory copies. We'll make
3805 * sure that the frame header lands at the end of the
3806 * HTX block to alias it upon recv. We cannot use the
3807 * head because rcv_buf() will realign the buffer if
3808 * it's empty. Thus we cheat and pretend we already
3809 * have a few bytes there.
3810 */
3811 max = buf_room_for_htx_data(buf) + 9;
3812 buf->head = sizeof(struct htx) - 9;
3813 }
3814 else
3815 max = b_room(buf);
Willy Tarreau2a59e872018-12-12 08:23:47 +01003816
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003817 ret = max ? conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0) : 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003818
Christopher Fauletde9d6052021-04-23 12:25:18 +02003819 if (max && !ret && h2_recv_allowed(h2c)) {
3820 TRACE_DATA("failed to receive data, subscribing", H2_EV_H2C_RECV, h2c->conn);
3821 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h2c->wait_event);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003822 } else if (ret) {
Willy Tarreau022e5e52020-09-10 09:33:15 +02003823 TRACE_DATA("received data", H2_EV_H2C_RECV, h2c->conn, 0, 0, (void*)(long)ret);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003824 h2c->flags &= ~H2_CF_DEM_SHORT_READ;
3825 }
Olivier Houchard81a15af2018-10-19 17:26:49 +02003826
Christopher Fauletde9d6052021-04-23 12:25:18 +02003827 if (conn_xprt_read0_pending(h2c->conn)) {
3828 TRACE_DATA("received read0", H2_EV_H2C_RECV, h2c->conn);
3829 h2c->flags |= H2_CF_RCVD_SHUT;
3830 }
3831
Olivier Houcharda1411e62018-08-17 18:42:48 +02003832 if (!b_data(buf)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +01003833 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02003834 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard46677732018-11-29 17:06:17 +01003835 return (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003836 }
3837
Willy Tarreau7838a792019-08-12 18:42:03 +02003838 if (b_data(buf) == buf->size) {
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003839 h2c->flags |= H2_CF_DEM_DFULL;
Willy Tarreau35fb8462019-10-02 11:05:46 +02003840 TRACE_STATE("demux buffer full", H2_EV_H2C_RECV|H2_EV_H2C_BLK, h2c->conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003841 }
3842
3843 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003844 return !!ret || (conn->flags & CO_FL_ERROR) || conn_xprt_read0_pending(conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003845}
3846
Willy Tarreau479998a2018-11-18 06:30:59 +01003847/* Try to send data if possible.
3848 * The function returns 1 if data have been sent, otherwise zero.
3849 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003850static int h2_send(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003851{
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003852 struct connection *conn = h2c->conn;
Willy Tarreaubc933932017-10-09 16:21:43 +02003853 int done;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003854 int sent = 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003855
Willy Tarreau7838a792019-08-12 18:42:03 +02003856 TRACE_ENTER(H2_EV_H2C_SEND, h2c->conn);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003857
Willy Tarreau7838a792019-08-12 18:42:03 +02003858 if (conn->flags & CO_FL_ERROR) {
3859 TRACE_DEVEL("leaving on error", H2_EV_H2C_SEND, h2c->conn);
3860 return 1;
3861 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003862
Willy Tarreau911db9b2020-01-23 16:27:54 +01003863 if (conn->flags & CO_FL_WAIT_XPRT) {
Willy Tarreaua2af5122017-10-09 11:56:46 +02003864 /* a handshake was requested */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003865 goto schedule;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003866 }
3867
Willy Tarreaubc933932017-10-09 16:21:43 +02003868 /* This loop is quite simple : it tries to fill as much as it can from
3869 * pending streams into the existing buffer until it's reportedly full
3870 * or the end of send requests is reached. Then it tries to send this
3871 * buffer's contents out, marks it not full if at least one byte could
3872 * be sent, and tries again.
3873 *
3874 * The snd_buf() function normally takes a "flags" argument which may
3875 * be made of a combination of CO_SFL_MSG_MORE to indicate that more
3876 * data immediately comes and CO_SFL_STREAMER to indicate that the
3877 * connection is streaming lots of data (used to increase TLS record
3878 * size at the expense of latency). The former can be sent any time
3879 * there's a buffer full flag, as it indicates at least one stream
3880 * attempted to send and failed so there are pending data. An
3881 * alternative would be to set it as long as there's an active stream
3882 * but that would be problematic for ACKs until we have an absolute
3883 * guarantee that all waiters have at least one byte to send. The
3884 * latter should possibly not be set for now.
3885 */
3886
3887 done = 0;
3888 while (!done) {
3889 unsigned int flags = 0;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003890 unsigned int released = 0;
3891 struct buffer *buf;
Willy Tarreaubc933932017-10-09 16:21:43 +02003892
3893 /* fill as much as we can into the current buffer */
3894 while (((h2c->flags & (H2_CF_MUX_MFULL|H2_CF_MUX_MALLOC)) == 0) && !done)
3895 done = h2_process_mux(h2c);
3896
Olivier Houchard2b094432019-01-29 18:28:36 +01003897 if (h2c->flags & H2_CF_MUX_MALLOC)
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003898 done = 1; // we won't go further without extra buffers
Olivier Houchard2b094432019-01-29 18:28:36 +01003899
Christopher Faulet9a3d3fc2020-10-22 16:24:58 +02003900 if ((conn->flags & (CO_FL_SOCK_WR_SH|CO_FL_ERROR)) ||
Willy Tarreaue90653b2021-10-21 17:30:06 +02003901 (h2c->flags & H2_CF_GOAWAY_FAILED))
Willy Tarreaubc933932017-10-09 16:21:43 +02003902 break;
3903
3904 if (h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))
3905 flags |= CO_SFL_MSG_MORE;
3906
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003907 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3908 if (b_data(buf)) {
3909 int ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, buf, b_data(buf), flags);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003910 if (!ret) {
3911 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003912 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003913 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003914 sent = 1;
Willy Tarreau022e5e52020-09-10 09:33:15 +02003915 TRACE_DATA("sent data", H2_EV_H2C_SEND, h2c->conn, 0, buf, (void*)(long)ret);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003916 b_del(buf, ret);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003917 if (b_data(buf)) {
3918 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003919 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003920 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003921 }
3922 b_free(buf);
3923 released++;
Willy Tarreau787db9a2018-06-14 18:31:46 +02003924 }
Willy Tarreaubc933932017-10-09 16:21:43 +02003925
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003926 if (released)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01003927 offer_buffers(NULL, released);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003928
Willy Tarreaubc933932017-10-09 16:21:43 +02003929 /* wrote at least one byte, the buffer is not full anymore */
Christopher Faulet69fe5ce2019-10-24 10:31:01 +02003930 if (sent)
3931 h2c->flags &= ~(H2_CF_MUX_MFULL | H2_CF_DEM_MROOM);
Willy Tarreaubc933932017-10-09 16:21:43 +02003932 }
3933
Willy Tarreaua2af5122017-10-09 11:56:46 +02003934 if (conn->flags & CO_FL_SOCK_WR_SH) {
3935 /* output closed, nothing to send, clear the buffer to release it */
Willy Tarreau51330962019-05-26 09:38:07 +02003936 b_reset(br_tail(h2c->mbuf));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003937 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02003938 /* We're not full anymore, so we can wake any task that are waiting
3939 * for us.
3940 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003941 if (!(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM)) && h2c->st0 >= H2_CS_FRAME_H)
3942 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01003943
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003944 /* We're done, no more to send */
Willy Tarreau7838a792019-08-12 18:42:03 +02003945 if (!br_data(h2c->mbuf)) {
3946 TRACE_DEVEL("leaving with everything sent", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003947 return sent;
Willy Tarreau7838a792019-08-12 18:42:03 +02003948 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003949schedule:
Willy Tarreau7838a792019-08-12 18:42:03 +02003950 if (!(conn->flags & CO_FL_ERROR) && !(h2c->wait_event.events & SUB_RETRY_SEND)) {
3951 TRACE_STATE("more data to send, subscribing", H2_EV_H2C_SEND, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003952 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003953 }
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003954
Willy Tarreau7838a792019-08-12 18:42:03 +02003955 TRACE_DEVEL("leaving with some data left to send", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003956 return sent;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003957}
3958
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003959/* this is the tasklet referenced in h2c->wait_event.tasklet */
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003960struct task *h2_io_cb(struct task *t, void *ctx, unsigned int state)
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003961{
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003962 struct connection *conn;
3963 struct tasklet *tl = (struct tasklet *)t;
3964 int conn_in_list;
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003965 struct h2c *h2c = ctx;
Olivier Houchard7505f942018-08-21 18:10:44 +02003966 int ret = 0;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003967
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003968 if (state & TASK_F_USR1) {
3969 /* the tasklet was idling on an idle connection, it might have
3970 * been stolen, let's be careful!
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003971 */
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003972 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3973 if (t->context == NULL) {
3974 /* The connection has been taken over by another thread,
3975 * we're no longer responsible for it, so just free the
3976 * tasklet, and do nothing.
3977 */
3978 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3979 tasklet_free(tl);
Willy Tarreau74163142021-03-13 11:30:19 +01003980 t = NULL;
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003981 goto leave;
3982 }
3983 conn = h2c->conn;
3984 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003985
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003986 /* Remove the connection from the list, to be sure nobody attempts
3987 * to use it while we handle the I/O events
3988 */
Christopher Fauletc5fd15d2023-03-16 11:43:05 +01003989 conn_in_list = conn_get_idle_flag(conn);
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003990 if (conn_in_list)
3991 conn_delete_from_tree(&conn->hash_node->node);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003992
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003993 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3994 } else {
3995 /* we're certain the connection was not in an idle list */
3996 conn = h2c->conn;
3997 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3998 conn_in_list = 0;
3999 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004000
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004001 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchard7505f942018-08-21 18:10:44 +02004002 ret = h2_send(h2c);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004003 if (!(h2c->wait_event.events & SUB_RETRY_RECV))
Olivier Houchard7505f942018-08-21 18:10:44 +02004004 ret |= h2_recv(h2c);
Willy Tarreaucef5c8e2018-12-18 10:29:54 +01004005 if (ret || b_data(&h2c->dbuf))
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004006 ret = h2_process(h2c);
4007
4008 /* If we were in an idle list, we want to add it back into it,
4009 * unless h2_process() returned -1, which mean it has destroyed
4010 * the connection (testing !ret is enough, if h2_process() wasn't
4011 * called then ret will be 0 anyway.
4012 */
Willy Tarreau74163142021-03-13 11:30:19 +01004013 if (ret < 0)
4014 t = NULL;
4015
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004016 if (!ret && conn_in_list) {
4017 struct server *srv = objt_server(conn->target);
4018
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004019 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004020 if (conn_in_list == CO_FL_SAFE_LIST)
Willy Tarreau430bf4a2021-03-04 09:45:32 +01004021 ebmb_insert(&srv->per_thr[tid].safe_conns, &conn->hash_node->node, sizeof(conn->hash_node->hash));
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004022 else
Willy Tarreau430bf4a2021-03-04 09:45:32 +01004023 ebmb_insert(&srv->per_thr[tid].idle_conns, &conn->hash_node->node, sizeof(conn->hash_node->hash));
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004024 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004025 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004026
Willy Tarreau38468772020-06-28 00:31:13 +02004027leave:
Willy Tarreau7838a792019-08-12 18:42:03 +02004028 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreau74163142021-03-13 11:30:19 +01004029 return t;
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004030}
Willy Tarreaua2af5122017-10-09 11:56:46 +02004031
Willy Tarreau62f52692017-10-08 23:01:42 +02004032/* callback called on any event by the connection handler.
4033 * It applies changes and returns zero, or < 0 if it wants immediate
4034 * destruction of the connection (which normally doesn not happen in h2).
4035 */
Olivier Houchard7505f942018-08-21 18:10:44 +02004036static int h2_process(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02004037{
Olivier Houchard7505f942018-08-21 18:10:44 +02004038 struct connection *conn = h2c->conn;
Willy Tarreaua2af5122017-10-09 11:56:46 +02004039
Willy Tarreau7838a792019-08-12 18:42:03 +02004040 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
4041
Willy Tarreauf0961222021-02-05 11:41:46 +01004042 if (!(h2c->flags & H2_CF_DEM_BLOCK_ANY) &&
4043 (b_data(&h2c->dbuf) || (h2c->flags & H2_CF_RCVD_SHUT))) {
Willy Tarreaud13bf272017-12-14 10:34:52 +01004044 h2_process_demux(h2c);
4045
4046 if (h2c->st0 >= H2_CS_ERROR || conn->flags & CO_FL_ERROR)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004047 b_reset(&h2c->dbuf);
Willy Tarreaud13bf272017-12-14 10:34:52 +01004048
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004049 if (!b_full(&h2c->dbuf))
Willy Tarreaud13bf272017-12-14 10:34:52 +01004050 h2c->flags &= ~H2_CF_DEM_DFULL;
4051 }
Olivier Houchard7505f942018-08-21 18:10:44 +02004052 h2_send(h2c);
Willy Tarreaud13bf272017-12-14 10:34:52 +01004053
Willy Tarreaub1e600c2020-10-13 18:09:15 +02004054 if (unlikely(h2c->proxy->disabled) && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau8ec14062017-12-30 18:08:13 +01004055 /* frontend is stopping, reload likely in progress, let's try
4056 * to announce a graceful shutdown if not yet done. We don't
4057 * care if it fails, it will be tried again later.
4058 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004059 TRACE_STATE("proxy stopped, sending GOAWAY", H2_EV_H2C_WAKE|H2_EV_TX_FRAME, conn);
Willy Tarreau8ec14062017-12-30 18:08:13 +01004060 if (!(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
4061 if (h2c->last_sid < 0)
4062 h2c->last_sid = (1U << 31) - 1;
4063 h2c_send_goaway_error(h2c, NULL);
4064 }
4065 }
4066
Olivier Houchard7fc96d52017-11-23 18:25:47 +01004067 /*
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004068 * If we received early data, and the handshake is done, wake
4069 * any stream that was waiting for it.
Olivier Houchard7fc96d52017-11-23 18:25:47 +01004070 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004071 if (!(h2c->flags & H2_CF_WAIT_FOR_HS) &&
Willy Tarreau911db9b2020-01-23 16:27:54 +01004072 (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 +01004073 struct eb32_node *node;
4074 struct h2s *h2s;
4075
4076 h2c->flags |= H2_CF_WAIT_FOR_HS;
4077 node = eb32_lookup_ge(&h2c->streams_by_id, 1);
4078
4079 while (node) {
4080 h2s = container_of(node, struct h2s, by_id);
Willy Tarreaufde287c2018-12-19 18:33:16 +01004081 if (h2s->cs && h2s->cs->flags & CS_FL_WAIT_FOR_HS)
Willy Tarreau7e094452018-12-19 18:08:52 +01004082 h2s_notify_recv(h2s);
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004083 node = eb32_next(node);
4084 }
Olivier Houchard7fc96d52017-11-23 18:25:47 +01004085 }
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004086
Christopher Fauletaade4ed2020-10-08 15:38:41 +02004087 if (conn->flags & CO_FL_ERROR || h2c_read0_pending(h2c) ||
Willy Tarreau29a98242017-10-31 06:59:15 +01004088 h2c->st0 == H2_CS_ERROR2 || h2c->flags & H2_CF_GOAWAY_FAILED ||
4089 (eb_is_empty(&h2c->streams_by_id) && h2c->last_sid >= 0 &&
4090 h2c->max_id >= h2c->last_sid)) {
Willy Tarreau23482912019-05-07 15:23:14 +02004091 h2_wake_some_streams(h2c, 0);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004092
4093 if (eb_is_empty(&h2c->streams_by_id)) {
4094 /* no more stream, kill the connection now */
Christopher Faulet73c12072019-04-08 11:23:22 +02004095 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004096 TRACE_DEVEL("leaving after releasing the connection", H2_EV_H2C_WAKE);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004097 return -1;
4098 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004099
4100 /* connections in error must be removed from the idle lists */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004101 if (conn->flags & CO_FL_LIST_MASK) {
4102 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004103 conn_delete_from_tree(&conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004104 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4105 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004106 }
4107 else if (h2c->st0 == H2_CS_ERROR) {
4108 /* connections in error must be removed from the idle lists */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004109 if (conn->flags & CO_FL_LIST_MASK) {
4110 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004111 conn_delete_from_tree(&conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004112 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4113 }
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004114 }
4115
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004116 if (!b_data(&h2c->dbuf))
Willy Tarreau44e973f2018-03-01 17:49:30 +01004117 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004118
Olivier Houchard53216e72018-10-10 15:46:36 +02004119 if ((conn->flags & CO_FL_SOCK_WR_SH) ||
4120 h2c->st0 == H2_CS_ERROR2 || (h2c->flags & H2_CF_GOAWAY_FAILED) ||
4121 (h2c->st0 != H2_CS_ERROR &&
Willy Tarreau662fafc2019-05-26 09:43:07 +02004122 !br_data(h2c->mbuf) &&
Olivier Houchard53216e72018-10-10 15:46:36 +02004123 (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) &&
4124 ((h2c->flags & H2_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&h2c->send_list))))
Willy Tarreau2e3c0002019-05-26 09:45:23 +02004125 h2_release_mbuf(h2c);
Willy Tarreaua2af5122017-10-09 11:56:46 +02004126
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01004127 h2c_update_timeout(h2c);
Olivier Houchard7505f942018-08-21 18:10:44 +02004128 h2_send(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004129 TRACE_LEAVE(H2_EV_H2C_WAKE, conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02004130 return 0;
4131}
4132
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004133/* wake-up function called by the connection layer (mux_ops.wake) */
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004134static int h2_wake(struct connection *conn)
4135{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004136 struct h2c *h2c = conn->ctx;
Willy Tarreau7838a792019-08-12 18:42:03 +02004137 int ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004138
Willy Tarreau7838a792019-08-12 18:42:03 +02004139 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
4140 ret = h2_process(h2c);
Willy Tarreau508f9892020-02-11 04:38:56 +01004141 if (ret >= 0)
4142 h2_wake_some_streams(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02004143 TRACE_LEAVE(H2_EV_H2C_WAKE);
4144 return ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004145}
4146
Willy Tarreauea392822017-10-31 10:02:25 +01004147/* Connection timeout management. The principle is that if there's no receipt
4148 * nor sending for a certain amount of time, the connection is closed. If the
4149 * MUX buffer still has lying data or is not allocatable, the connection is
4150 * immediately killed. If it's allocatable and empty, we attempt to send a
4151 * GOAWAY frame.
4152 */
Willy Tarreau144f84a2021-03-02 16:09:26 +01004153struct task *h2_timeout_task(struct task *t, void *context, unsigned int state)
Willy Tarreauea392822017-10-31 10:02:25 +01004154{
Olivier Houchard9f6af332018-05-25 14:04:04 +02004155 struct h2c *h2c = context;
Willy Tarreauea392822017-10-31 10:02:25 +01004156 int expired = tick_is_expired(t->expire, now_ms);
4157
Willy Tarreau7838a792019-08-12 18:42:03 +02004158 TRACE_ENTER(H2_EV_H2C_WAKE, h2c ? h2c->conn : NULL);
4159
Willy Tarreaubd42e922020-06-30 11:19:23 +02004160 if (h2c) {
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004161 /* Make sure nobody stole the connection from us */
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004162 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004163
4164 /* Somebody already stole the connection from us, so we should not
4165 * free it, we just have to free the task.
4166 */
4167 if (!t->context) {
4168 h2c = NULL;
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004169 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004170 goto do_leave;
4171 }
4172
4173
Willy Tarreaubd42e922020-06-30 11:19:23 +02004174 if (!expired) {
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004175 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004176 TRACE_DEVEL("leaving (not expired)", H2_EV_H2C_WAKE, h2c->conn);
4177 return t;
4178 }
Willy Tarreauea392822017-10-31 10:02:25 +01004179
Willy Tarreaubd42e922020-06-30 11:19:23 +02004180 if (!h2c_may_expire(h2c)) {
4181 /* we do still have streams but all of them are idle, waiting
4182 * for the data layer, so we must not enforce the timeout here.
4183 */
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004184 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004185 t->expire = TICK_ETERNITY;
4186 return t;
4187 }
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02004188
Willy Tarreaubd42e922020-06-30 11:19:23 +02004189 /* We're about to destroy the connection, so make sure nobody attempts
4190 * to steal it from us.
4191 */
Christopher Fauletc5fd15d2023-03-16 11:43:05 +01004192 if (h2c->conn->flags & CO_FL_LIST_MASK)
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004193 conn_delete_from_tree(&h2c->conn->hash_node->node);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004194
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004195 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004196 }
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004197
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004198do_leave:
Olivier Houchard3f795f72019-04-17 22:51:06 +02004199 task_destroy(t);
Willy Tarreau0975f112018-03-29 15:22:59 +02004200
4201 if (!h2c) {
4202 /* resources were already deleted */
Willy Tarreau7838a792019-08-12 18:42:03 +02004203 TRACE_DEVEL("leaving (not more h2c)", H2_EV_H2C_WAKE);
Willy Tarreau0975f112018-03-29 15:22:59 +02004204 return NULL;
4205 }
4206
4207 h2c->task = NULL;
Willy Tarreauea392822017-10-31 10:02:25 +01004208 h2c_error(h2c, H2_ERR_NO_ERROR);
Willy Tarreau23482912019-05-07 15:23:14 +02004209 h2_wake_some_streams(h2c, 0);
Willy Tarreauea392822017-10-31 10:02:25 +01004210
Willy Tarreau662fafc2019-05-26 09:43:07 +02004211 if (br_data(h2c->mbuf)) {
Willy Tarreauea392822017-10-31 10:02:25 +01004212 /* don't even try to send a GOAWAY, the buffer is stuck */
4213 h2c->flags |= H2_CF_GOAWAY_FAILED;
4214 }
4215
4216 /* try to send but no need to insist */
Willy Tarreau599391a2017-11-24 10:16:00 +01004217 h2c->last_sid = h2c->max_id;
Willy Tarreauea392822017-10-31 10:02:25 +01004218 if (h2c_send_goaway_error(h2c, NULL) <= 0)
4219 h2c->flags |= H2_CF_GOAWAY_FAILED;
4220
Willy Tarreau662fafc2019-05-26 09:43:07 +02004221 if (br_data(h2c->mbuf) && !(h2c->flags & H2_CF_GOAWAY_FAILED) && conn_xprt_ready(h2c->conn)) {
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004222 unsigned int released = 0;
4223 struct buffer *buf;
4224
4225 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
4226 if (b_data(buf)) {
4227 int ret = h2c->conn->xprt->snd_buf(h2c->conn, h2c->conn->xprt_ctx, buf, b_data(buf), 0);
4228 if (!ret)
4229 break;
4230 b_del(buf, ret);
4231 if (b_data(buf))
4232 break;
4233 b_free(buf);
4234 released++;
4235 }
Willy Tarreau787db9a2018-06-14 18:31:46 +02004236 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004237
4238 if (released)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01004239 offer_buffers(NULL, released);
Willy Tarreau787db9a2018-06-14 18:31:46 +02004240 }
Willy Tarreauea392822017-10-31 10:02:25 +01004241
Willy Tarreau4481e262019-10-31 15:36:30 +01004242 /* in any case this connection must not be considered idle anymore */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004243 if (h2c->conn->flags & CO_FL_LIST_MASK) {
4244 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004245 conn_delete_from_tree(&h2c->conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004246 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4247 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004248
Willy Tarreau0975f112018-03-29 15:22:59 +02004249 /* either we can release everything now or it will be done later once
4250 * the last stream closes.
4251 */
4252 if (eb_is_empty(&h2c->streams_by_id))
Christopher Faulet73c12072019-04-08 11:23:22 +02004253 h2_release(h2c);
Willy Tarreauea392822017-10-31 10:02:25 +01004254
Willy Tarreau7838a792019-08-12 18:42:03 +02004255 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreauea392822017-10-31 10:02:25 +01004256 return NULL;
4257}
4258
4259
Willy Tarreau62f52692017-10-08 23:01:42 +02004260/*******************************************/
4261/* functions below are used by the streams */
4262/*******************************************/
4263
4264/*
4265 * Attach a new stream to a connection
4266 * (Used for outgoing connections)
4267 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01004268static struct conn_stream *h2_attach(struct connection *conn, struct session *sess)
Willy Tarreau62f52692017-10-08 23:01:42 +02004269{
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004270 struct conn_stream *cs;
4271 struct h2s *h2s;
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004272 struct h2c *h2c = conn->ctx;
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004273
Willy Tarreau7838a792019-08-12 18:42:03 +02004274 TRACE_ENTER(H2_EV_H2S_NEW, conn);
Christopher Faulet236c93b2020-07-02 09:19:54 +02004275 cs = cs_new(conn, conn->target);
Willy Tarreau7838a792019-08-12 18:42:03 +02004276 if (!cs) {
4277 TRACE_DEVEL("leaving on CS allocation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004278 return NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004279 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01004280 h2s = h2c_bck_stream_new(h2c, cs, sess);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004281 if (!h2s) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004282 TRACE_DEVEL("leaving on stream creation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004283 cs_free(cs);
4284 return NULL;
4285 }
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004286
4287 /* the connection is not idle anymore, let's mark this */
4288 HA_ATOMIC_AND(&h2c->wait_event.tasklet->state, ~TASK_F_USR1);
Willy Tarreau4f8cd432021-03-02 17:27:58 +01004289 xprt_set_used(h2c->conn, h2c->conn->xprt, h2c->conn->xprt_ctx);
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004290
Willy Tarreau7838a792019-08-12 18:42:03 +02004291 TRACE_LEAVE(H2_EV_H2S_NEW, conn, h2s);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004292 return cs;
Willy Tarreau62f52692017-10-08 23:01:42 +02004293}
4294
Willy Tarreaufafd3982018-11-18 21:29:20 +01004295/* Retrieves the first valid conn_stream from this connection, or returns NULL.
4296 * We have to scan because we may have some orphan streams. It might be
4297 * beneficial to scan backwards from the end to reduce the likeliness to find
4298 * orphans.
4299 */
4300static const struct conn_stream *h2_get_first_cs(const struct connection *conn)
4301{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004302 struct h2c *h2c = conn->ctx;
Willy Tarreaufafd3982018-11-18 21:29:20 +01004303 struct h2s *h2s;
4304 struct eb32_node *node;
4305
4306 node = eb32_first(&h2c->streams_by_id);
4307 while (node) {
4308 h2s = container_of(node, struct h2s, by_id);
4309 if (h2s->cs)
4310 return h2s->cs;
4311 node = eb32_next(node);
4312 }
4313 return NULL;
4314}
4315
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004316static int h2_ctl(struct connection *conn, enum mux_ctl_type mux_ctl, void *output)
4317{
4318 int ret = 0;
4319 struct h2c *h2c = conn->ctx;
4320
4321 switch (mux_ctl) {
4322 case MUX_STATUS:
4323 /* Only consider the mux to be ready if we're done with
4324 * the preface and settings, and we had no error.
4325 */
4326 if (h2c->st0 >= H2_CS_FRAME_H && h2c->st0 < H2_CS_ERROR)
4327 ret |= MUX_STATUS_READY;
4328 return ret;
Christopher Faulet4c8ad842020-10-06 14:59:17 +02004329 case MUX_EXIT_STATUS:
4330 return MUX_ES_UNKNOWN;
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004331 default:
4332 return -1;
4333 }
4334}
4335
Willy Tarreau62f52692017-10-08 23:01:42 +02004336/*
Olivier Houchard060ed432018-11-06 16:32:42 +01004337 * Destroy the mux and the associated connection, if it is no longer used
4338 */
Christopher Faulet73c12072019-04-08 11:23:22 +02004339static void h2_destroy(void *ctx)
Olivier Houchard060ed432018-11-06 16:32:42 +01004340{
Christopher Faulet73c12072019-04-08 11:23:22 +02004341 struct h2c *h2c = ctx;
Olivier Houchard060ed432018-11-06 16:32:42 +01004342
Willy Tarreau7838a792019-08-12 18:42:03 +02004343 TRACE_ENTER(H2_EV_H2C_END, h2c->conn);
Christopher Faulet39a96ee2019-04-08 10:52:21 +02004344 if (eb_is_empty(&h2c->streams_by_id) || !h2c->conn || h2c->conn->ctx != h2c)
Christopher Faulet73c12072019-04-08 11:23:22 +02004345 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004346 TRACE_LEAVE(H2_EV_H2C_END);
Olivier Houchard060ed432018-11-06 16:32:42 +01004347}
4348
4349/*
Willy Tarreau62f52692017-10-08 23:01:42 +02004350 * Detach the stream from the connection and possibly release the connection.
4351 */
4352static void h2_detach(struct conn_stream *cs)
4353{
Willy Tarreau60935142017-10-16 18:11:19 +02004354 struct h2s *h2s = cs->ctx;
4355 struct h2c *h2c;
Olivier Houchardf502aca2018-12-14 19:42:40 +01004356 struct session *sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004357
Willy Tarreau7838a792019-08-12 18:42:03 +02004358 TRACE_ENTER(H2_EV_STRM_END, h2s ? h2s->h2c->conn : NULL, h2s);
4359
Willy Tarreau60935142017-10-16 18:11:19 +02004360 cs->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004361 if (!h2s) {
4362 TRACE_LEAVE(H2_EV_STRM_END);
Willy Tarreau60935142017-10-16 18:11:19 +02004363 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004364 }
Willy Tarreau60935142017-10-16 18:11:19 +02004365
Willy Tarreaud9464162020-01-10 18:25:07 +01004366 /* there's no txbuf so we're certain not to be able to send anything */
4367 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02004368
Olivier Houchardf502aca2018-12-14 19:42:40 +01004369 sess = h2s->sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004370 h2c = h2s->h2c;
4371 h2s->cs = NULL;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02004372 h2c->nb_cs--;
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01004373 if (!h2c->nb_cs)
4374 h2c->idle_start = now_ms;
4375
Willy Tarreaufa1d3572019-01-31 10:31:51 +01004376 if ((h2c->flags & (H2_CF_IS_BACK|H2_CF_DEM_TOOMANY)) == H2_CF_DEM_TOOMANY &&
4377 !h2_frt_has_too_many_cs(h2c)) {
4378 /* frontend connection was blocking new streams creation */
Willy Tarreauf2101912018-07-19 10:11:38 +02004379 h2c->flags &= ~H2_CF_DEM_TOOMANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004380 h2c_restart_reading(h2c, 1);
Willy Tarreauf2101912018-07-19 10:11:38 +02004381 }
Willy Tarreau60935142017-10-16 18:11:19 +02004382
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004383 /* this stream may be blocked waiting for some data to leave (possibly
4384 * an ES or RST frame), so orphan it in this case.
4385 */
Willy Tarreau3041fcc2018-03-29 15:41:32 +02004386 if (!(cs->conn->flags & CO_FL_ERROR) &&
Willy Tarreaua2b51812018-07-27 09:55:14 +02004387 (h2c->st0 < H2_CS_ERROR) &&
Willy Tarreau5723f292020-01-10 15:16:57 +01004388 (h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL)) &&
Willy Tarreauf96508a2020-01-10 11:12:48 +01004389 ((h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) || h2s->subs)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004390 TRACE_DEVEL("leaving on stream blocked", H2_EV_STRM_END|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01004391 /* refresh the timeout if none was active, so that the last
4392 * leaving stream may arm it.
4393 */
Willy Tarreau4e91ddb2023-03-16 18:06:19 +01004394 if (h2c->task && !tick_isset(h2c->task->expire))
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01004395 h2c_update_timeout(h2c);
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004396 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004397 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004398
Willy Tarreau45f752e2017-10-30 15:44:59 +01004399 if ((h2c->flags & H2_CF_DEM_BLOCK_ANY && h2s->id == h2c->dsi) ||
4400 (h2c->flags & H2_CF_MUX_BLOCK_ANY && h2s->id == h2c->msi)) {
4401 /* unblock the connection if it was blocked on this
4402 * stream.
4403 */
4404 h2c->flags &= ~H2_CF_DEM_BLOCK_ANY;
4405 h2c->flags &= ~H2_CF_MUX_BLOCK_ANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004406 h2c_restart_reading(h2c, 1);
Willy Tarreau45f752e2017-10-30 15:44:59 +01004407 }
4408
Willy Tarreau71049cc2018-03-28 13:56:39 +02004409 h2s_destroy(h2s);
Willy Tarreau60935142017-10-16 18:11:19 +02004410
Christopher Faulet9b79a102019-07-15 11:22:56 +02004411 if (h2c->flags & H2_CF_IS_BACK) {
Olivier Houchard8a786902018-12-15 16:05:40 +01004412 if (!(h2c->conn->flags &
4413 (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH))) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004414 if (h2c->conn->flags & CO_FL_PRIVATE) {
Christopher Faulet08016ab2020-07-01 16:10:06 +02004415 /* Add the connection in the session server list, if not already done */
4416 if (!session_add_conn(sess, h2c->conn, h2c->conn->target)) {
4417 h2c->conn->owner = NULL;
4418 if (eb_is_empty(&h2c->streams_by_id)) {
4419 h2c->conn->mux->destroy(h2c);
4420 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4421 return;
Christopher Fauletc5579d12020-07-01 15:45:41 +02004422 }
4423 }
Christopher Faulet08016ab2020-07-01 16:10:06 +02004424 if (eb_is_empty(&h2c->streams_by_id)) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004425 if (session_check_idle_conn(h2c->conn->owner, h2c->conn) != 0) {
4426 /* At this point either the connection is destroyed, or it's been added to the server idle list, just stop */
4427 TRACE_DEVEL("leaving without reusable idle connection", H2_EV_STRM_END);
Olivier Houchard351411f2018-12-27 17:20:54 +01004428 return;
4429 }
4430 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004431 }
Christopher Fauletc5579d12020-07-01 15:45:41 +02004432 else {
4433 if (eb_is_empty(&h2c->streams_by_id)) {
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004434 /* If the connection is owned by the session, first remove it
4435 * from its list
4436 */
4437 if (h2c->conn->owner) {
4438 session_unown_conn(h2c->conn->owner, h2c->conn);
4439 h2c->conn->owner = NULL;
4440 }
4441
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004442 /* mark that the tasklet may lose its context to another thread and
4443 * that the handler needs to check it under the idle conns lock.
4444 */
4445 HA_ATOMIC_OR(&h2c->wait_event.tasklet->state, TASK_F_USR1);
Willy Tarreau4f8cd432021-03-02 17:27:58 +01004446 xprt_set_idle(h2c->conn, h2c->conn->xprt, h2c->conn->xprt_ctx);
4447
Olivier Houcharddc2f2752020-02-13 19:12:07 +01004448 if (!srv_add_to_idle_list(objt_server(h2c->conn->target), h2c->conn, 1)) {
Olivier Houchard2444aa52020-01-20 13:56:01 +01004449 /* The server doesn't want it, let's kill the connection right away */
4450 h2c->conn->mux->destroy(h2c);
4451 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4452 return;
4453 }
Olivier Houchard199d4fa2020-03-22 23:25:51 +01004454 /* At this point, the connection has been added to the
4455 * server idle list, so another thread may already have
4456 * hijacked it, so we can't do anything with it.
4457 */
Olivier Houchard2444aa52020-01-20 13:56:01 +01004458 TRACE_DEVEL("reusable idle connection", H2_EV_STRM_END);
4459 return;
Olivier Houchard8a786902018-12-15 16:05:40 +01004460
Olivier Houchard8a786902018-12-15 16:05:40 +01004461 }
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004462 else if (!h2c->conn->hash_node->node.node.leaf_p &&
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004463 h2_avail_streams(h2c->conn) > 0 && objt_server(h2c->conn->target) &&
Willy Tarreau2b718102021-04-21 07:32:39 +02004464 !LIST_INLIST(&h2c->conn->session_list)) {
Willy Tarreau430bf4a2021-03-04 09:45:32 +01004465 ebmb_insert(&__objt_server(h2c->conn->target)->per_thr[tid].avail_conns,
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004466 &h2c->conn->hash_node->node,
4467 sizeof(h2c->conn->hash_node->hash));
Christopher Fauletc5579d12020-07-01 15:45:41 +02004468 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004469 }
4470 }
4471 }
4472
Willy Tarreaue323f342018-03-28 13:51:45 +02004473 /* We don't want to close right now unless we're removing the
4474 * last stream, and either the connection is in error, or it
4475 * reached the ID already specified in a GOAWAY frame received
4476 * or sent (as seen by last_sid >= 0).
4477 */
Olivier Houchard7a977432019-03-21 15:47:13 +01004478 if (h2c_is_dead(h2c)) {
Willy Tarreaue323f342018-03-28 13:51:45 +02004479 /* no more stream will come, kill it now */
Willy Tarreau7838a792019-08-12 18:42:03 +02004480 TRACE_DEVEL("leaving and killing dead connection", H2_EV_STRM_END, h2c->conn);
Christopher Faulet73c12072019-04-08 11:23:22 +02004481 h2_release(h2c);
Willy Tarreaue323f342018-03-28 13:51:45 +02004482 }
4483 else if (h2c->task) {
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01004484 h2c_update_timeout(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004485 TRACE_DEVEL("leaving, refreshing connection's timeout", H2_EV_STRM_END, h2c->conn);
Willy Tarreau60935142017-10-16 18:11:19 +02004486 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004487 else
4488 TRACE_DEVEL("leaving", H2_EV_STRM_END, h2c->conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02004489}
4490
Willy Tarreau88bdba32019-05-13 18:17:53 +02004491/* Performs a synchronous or asynchronous shutr(). */
4492static void h2_do_shutr(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004493{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004494 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004495
Willy Tarreauf983d002019-05-14 10:40:21 +02004496 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004497 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004498
Willy Tarreau7838a792019-08-12 18:42:03 +02004499 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4500
Willy Tarreau18059042019-01-31 19:12:48 +01004501 /* a connstream may require us to immediately kill the whole connection
4502 * for example because of a "tcp-request content reject" rule that is
4503 * normally used to limit abuse. In this case we schedule a goaway to
4504 * close the connection.
Willy Tarreau926fa4c2017-11-07 14:42:12 +01004505 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004506 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004507 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004508 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004509 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4510 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4511 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004512 else if (!(h2s->flags & H2_SF_HEADERS_SENT)) {
4513 /* Nothing was never sent for this stream, so reset with
4514 * REFUSED_STREAM error to let the client retry the
4515 * request.
4516 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004517 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004518 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4519 }
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004520 else {
4521 /* a final response was already provided, we don't want this
4522 * stream anymore. This may happen when the server responds
4523 * before the end of an upload and closes quickly (redirect,
4524 * deny, ...)
4525 */
4526 h2s_error(h2s, H2_ERR_CANCEL);
4527 }
Willy Tarreau18059042019-01-31 19:12:48 +01004528
Willy Tarreau90c32322017-11-24 08:00:30 +01004529 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004530 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004531 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004532
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004533 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004534 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau00dd0782018-03-01 16:31:34 +01004535 h2s_close(h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004536 done:
4537 h2s->flags &= ~H2_SF_WANT_SHUTR;
Willy Tarreau7838a792019-08-12 18:42:03 +02004538 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004539 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004540add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004541 /* Let the handler know we want to shutr, and add ourselves to the
4542 * most relevant list if not yet done. h2_deferred_shut() will be
4543 * automatically called via the shut_tl tasklet when there's room
4544 * again.
4545 */
4546 h2s->flags |= H2_SF_WANT_SHUTR;
Willy Tarreau2b718102021-04-21 07:32:39 +02004547 if (!LIST_INLIST(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004548 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02004549 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004550 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Willy Tarreau2b718102021-04-21 07:32:39 +02004551 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004552 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004553 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004554 return;
Willy Tarreau62f52692017-10-08 23:01:42 +02004555}
4556
Willy Tarreau88bdba32019-05-13 18:17:53 +02004557/* Performs a synchronous or asynchronous shutw(). */
4558static void h2_do_shutw(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004559{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004560 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004561
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004562 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004563 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004564
Willy Tarreau7838a792019-08-12 18:42:03 +02004565 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4566
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004567 if (h2s->st != H2_SS_ERROR && (h2s->flags & H2_SF_HEADERS_SENT)) {
Willy Tarreau58e32082017-11-07 14:41:09 +01004568 /* we can cleanly close using an empty data frame only after headers */
4569
4570 if (!(h2s->flags & (H2_SF_ES_SENT|H2_SF_RST_SENT)) &&
4571 h2_send_empty_data_es(h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004572 goto add_to_list;
Willy Tarreau58e32082017-11-07 14:41:09 +01004573
4574 if (h2s->st == H2_SS_HREM)
Willy Tarreau00dd0782018-03-01 16:31:34 +01004575 h2s_close(h2s);
Willy Tarreau58e32082017-11-07 14:41:09 +01004576 else
4577 h2s->st = H2_SS_HLOC;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004578 } else {
Willy Tarreau18059042019-01-31 19:12:48 +01004579 /* a connstream may require us to immediately kill the whole connection
4580 * for example because of a "tcp-request content reject" rule that is
4581 * normally used to limit abuse. In this case we schedule a goaway to
4582 * close the connection.
Willy Tarreaua1349f02017-10-31 07:41:55 +01004583 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004584 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004585 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004586 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004587 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4588 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4589 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004590 else {
4591 /* Nothing was never sent for this stream, so reset with
4592 * REFUSED_STREAM error to let the client retry the
4593 * request.
4594 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004595 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004596 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4597 }
Willy Tarreau18059042019-01-31 19:12:48 +01004598
Willy Tarreau90c32322017-11-24 08:00:30 +01004599 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004600 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004601 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004602
Willy Tarreau00dd0782018-03-01 16:31:34 +01004603 h2s_close(h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004604 }
4605
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004606 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004607 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau7838a792019-08-12 18:42:03 +02004608
4609 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
4610
Willy Tarreau88bdba32019-05-13 18:17:53 +02004611 done:
4612 h2s->flags &= ~H2_SF_WANT_SHUTW;
4613 return;
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004614
4615 add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004616 /* Let the handler know we want to shutw, and add ourselves to the
4617 * most relevant list if not yet done. h2_deferred_shut() will be
4618 * automatically called via the shut_tl tasklet when there's room
4619 * again.
4620 */
4621 h2s->flags |= H2_SF_WANT_SHUTW;
Willy Tarreau2b718102021-04-21 07:32:39 +02004622 if (!LIST_INLIST(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004623 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02004624 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004625 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Willy Tarreau2b718102021-04-21 07:32:39 +02004626 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004627 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004628 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004629 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004630}
4631
Willy Tarreau5723f292020-01-10 15:16:57 +01004632/* This is the tasklet referenced in h2s->shut_tl, it is used for
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004633 * deferred shutdowns when the h2_detach() was done but the mux buffer was full
4634 * and prevented the last frame from being emitted.
4635 */
Willy Tarreau144f84a2021-03-02 16:09:26 +01004636struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned int state)
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004637{
4638 struct h2s *h2s = ctx;
Willy Tarreau88bdba32019-05-13 18:17:53 +02004639 struct h2c *h2c = h2s->h2c;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004640
Willy Tarreau7838a792019-08-12 18:42:03 +02004641 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4642
Willy Tarreau5723f292020-01-10 15:16:57 +01004643 if (h2s->flags & H2_SF_NOTIFIED) {
4644 /* some data processing remains to be done first */
4645 goto end;
4646 }
4647
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004648 if (h2s->flags & H2_SF_WANT_SHUTW)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004649 h2_do_shutw(h2s);
4650
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004651 if (h2s->flags & H2_SF_WANT_SHUTR)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004652 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004653
Willy Tarreau88bdba32019-05-13 18:17:53 +02004654 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004655 /* We're done trying to send, remove ourself from the send_list */
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004656 LIST_DEL_INIT(&h2s->list);
Olivier Houchard7a977432019-03-21 15:47:13 +01004657
Willy Tarreau88bdba32019-05-13 18:17:53 +02004658 if (!h2s->cs) {
4659 h2s_destroy(h2s);
Willy Tarreau74163142021-03-13 11:30:19 +01004660 if (h2c_is_dead(h2c)) {
Willy Tarreau88bdba32019-05-13 18:17:53 +02004661 h2_release(h2c);
Willy Tarreau74163142021-03-13 11:30:19 +01004662 t = NULL;
4663 }
Willy Tarreau88bdba32019-05-13 18:17:53 +02004664 }
Olivier Houchard7a977432019-03-21 15:47:13 +01004665 }
Willy Tarreau5723f292020-01-10 15:16:57 +01004666 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02004667 TRACE_LEAVE(H2_EV_STRM_SHUT);
Willy Tarreau74163142021-03-13 11:30:19 +01004668 return t;
Willy Tarreau62f52692017-10-08 23:01:42 +02004669}
4670
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004671/* shutr() called by the conn_stream (mux_ops.shutr) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004672static void h2_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
4673{
4674 struct h2s *h2s = cs->ctx;
4675
Willy Tarreau7838a792019-08-12 18:42:03 +02004676 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004677 if (cs->flags & CS_FL_KILL_CONN)
4678 h2s->flags |= H2_SF_KILL_CONN;
4679
Willy Tarreau7838a792019-08-12 18:42:03 +02004680 if (mode)
4681 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004682
Willy Tarreau7838a792019-08-12 18:42:03 +02004683 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004684}
4685
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004686/* shutw() called by the conn_stream (mux_ops.shutw) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004687static void h2_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
4688{
4689 struct h2s *h2s = cs->ctx;
4690
Willy Tarreau7838a792019-08-12 18:42:03 +02004691 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004692 if (cs->flags & CS_FL_KILL_CONN)
4693 h2s->flags |= H2_SF_KILL_CONN;
4694
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004695 h2_do_shutw(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02004696 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004697}
4698
Christopher Faulet9b79a102019-07-15 11:22:56 +02004699/* Decode the payload of a HEADERS frame and produce the HTX request or response
4700 * depending on the connection's side. Returns a positive value on success, a
4701 * negative value on failure, or 0 if it couldn't proceed. May report connection
4702 * errors in h2c->errcode if the frame is non-decodable and the connection
4703 * unrecoverable. In absence of connection error when a failure is reported, the
4704 * caller must assume a stream error.
Willy Tarreauea18f862018-12-22 20:19:26 +01004705 *
4706 * The function may fold CONTINUATION frames into the initial HEADERS frame
4707 * by removing padding and next frame header, then moving the CONTINUATION
4708 * frame's payload and adjusting h2c->dfl to match the new aggregated frame,
4709 * leaving a hole between the main frame and the beginning of the next one.
4710 * The possibly remaining incomplete or next frame at the end may be moved
4711 * if the aggregated frame is not deleted, in order to fill the hole. Wrapped
4712 * HEADERS frames are unwrapped into a temporary buffer before decoding.
4713 *
4714 * A buffer at the beginning of processing may look like this :
4715 *
4716 * ,---.---------.-----.--------------.--------------.------.---.
4717 * |///| HEADERS | PAD | CONTINUATION | CONTINUATION | DATA |///|
4718 * `---^---------^-----^--------------^--------------^------^---'
4719 * | | <-----> | |
4720 * area | dpl | wrap
4721 * |<--------------> |
4722 * | dfl |
4723 * |<-------------------------------------------------->|
4724 * head data
4725 *
4726 * Padding is automatically overwritten when folding, participating to the
4727 * hole size after dfl :
4728 *
4729 * ,---.------------------------.-----.--------------.------.---.
4730 * |///| HEADERS : CONTINUATION |/////| CONTINUATION | DATA |///|
4731 * `---^------------------------^-----^--------------^------^---'
4732 * | | <-----> | |
4733 * area | hole | wrap
4734 * |<-----------------------> |
4735 * | dfl |
4736 * |<-------------------------------------------------->|
4737 * head data
4738 *
4739 * Please note that the HEADERS frame is always deprived from its PADLEN byte
4740 * however it may start with the 5 stream-dep+weight bytes in case of PRIORITY
4741 * bit.
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004742 *
4743 * The <flags> field must point to either the stream's flags or to a copy of it
4744 * so that the function can update the following flags :
4745 * - H2_SF_DATA_CLEN when content-length is seen
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004746 * - H2_SF_HEADERS_RCVD once the frame is successfully decoded
Willy Tarreau88d138e2019-01-02 19:38:14 +01004747 *
4748 * The H2_SF_HEADERS_RCVD flag is also looked at in the <flags> field prior to
4749 * decoding, in order to detect if we're dealing with a headers or a trailers
4750 * block (the trailers block appears after H2_SF_HEADERS_RCVD was seen).
Willy Tarreau13278b42017-10-13 19:23:14 +02004751 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01004752static 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 +02004753{
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004754 const uint8_t *hdrs = (uint8_t *)b_head(&h2c->dbuf);
Willy Tarreau83061a82018-07-13 11:56:34 +02004755 struct buffer *tmp = get_trash_chunk();
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004756 struct http_hdr list[global.tune.max_http_hdr * 2];
Willy Tarreau83061a82018-07-13 11:56:34 +02004757 struct buffer *copy = NULL;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004758 unsigned int msgf;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004759 struct htx *htx = NULL;
Willy Tarreauea18f862018-12-22 20:19:26 +01004760 int flen; // header frame len
4761 int hole = 0;
Willy Tarreau86277d42019-01-02 15:36:11 +01004762 int ret = 0;
4763 int outlen;
Willy Tarreau13278b42017-10-13 19:23:14 +02004764 int wrap;
Willy Tarreau13278b42017-10-13 19:23:14 +02004765
Willy Tarreau7838a792019-08-12 18:42:03 +02004766 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
4767
Willy Tarreauea18f862018-12-22 20:19:26 +01004768next_frame:
4769 if (b_data(&h2c->dbuf) - hole < h2c->dfl)
4770 goto leave; // incomplete input frame
4771
4772 /* No END_HEADERS means there's one or more CONTINUATION frames. In
4773 * this case, we'll try to paste it immediately after the initial
4774 * HEADERS frame payload and kill any possible padding. The initial
4775 * frame's length will be increased to represent the concatenation
4776 * of the two frames. The next frame is read from position <tlen>
4777 * and written at position <flen> (minus padding if some is present).
4778 */
4779 if (unlikely(!(h2c->dff & H2_F_HEADERS_END_HEADERS))) {
4780 struct h2_fh hdr;
4781 int clen; // CONTINUATION frame's payload length
4782
Willy Tarreau7838a792019-08-12 18:42:03 +02004783 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 +01004784 if (!h2_peek_frame_hdr(&h2c->dbuf, h2c->dfl + hole, &hdr)) {
4785 /* no more data, the buffer may be full, either due to
4786 * too large a frame or because of too large a hole that
4787 * we're going to compact at the end.
4788 */
4789 goto leave;
4790 }
4791
4792 if (hdr.ft != H2_FT_CONTINUATION) {
4793 /* RFC7540#6.10: frame of unexpected type */
Willy Tarreau7838a792019-08-12 18:42:03 +02004794 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 +01004795 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004796 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreauea18f862018-12-22 20:19:26 +01004797 goto fail;
4798 }
4799
4800 if (hdr.sid != h2c->dsi) {
4801 /* RFC7540#6.10: frame of different stream */
Willy Tarreau7838a792019-08-12 18:42:03 +02004802 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 +01004803 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004804 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreauea18f862018-12-22 20:19:26 +01004805 goto fail;
4806 }
4807
4808 if ((unsigned)hdr.len > (unsigned)global.tune.bufsize) {
4809 /* RFC7540#4.2: invalid frame length */
Willy Tarreau7838a792019-08-12 18:42:03 +02004810 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 +01004811 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4812 goto fail;
4813 }
4814
4815 /* detect when we must stop aggragating frames */
4816 h2c->dff |= hdr.ff & H2_F_HEADERS_END_HEADERS;
4817
4818 /* Take as much as we can of the CONTINUATION frame's payload */
4819 clen = b_data(&h2c->dbuf) - (h2c->dfl + hole + 9);
4820 if (clen > hdr.len)
4821 clen = hdr.len;
4822
4823 /* Move the frame's payload over the padding, hole and frame
4824 * header. At least one of hole or dpl is null (see diagrams
4825 * above). The hole moves after the new aggragated frame.
4826 */
4827 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 +02004828 h2c->dfl += hdr.len - h2c->dpl;
Willy Tarreauea18f862018-12-22 20:19:26 +01004829 hole += h2c->dpl + 9;
4830 h2c->dpl = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004831 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 +01004832 goto next_frame;
4833 }
4834
4835 flen = h2c->dfl - h2c->dpl;
Willy Tarreau68472622017-12-11 18:36:37 +01004836
Willy Tarreau13278b42017-10-13 19:23:14 +02004837 /* if the input buffer wraps, take a temporary copy of it (rare) */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004838 wrap = b_wrap(&h2c->dbuf) - b_head(&h2c->dbuf);
Willy Tarreau13278b42017-10-13 19:23:14 +02004839 if (wrap < h2c->dfl) {
Willy Tarreau68dd9852017-07-03 14:44:26 +02004840 copy = alloc_trash_chunk();
4841 if (!copy) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004842 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 +02004843 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
4844 goto fail;
4845 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004846 memcpy(copy->area, b_head(&h2c->dbuf), wrap);
4847 memcpy(copy->area + wrap, b_orig(&h2c->dbuf), h2c->dfl - wrap);
4848 hdrs = (uint8_t *) copy->area;
Willy Tarreau13278b42017-10-13 19:23:14 +02004849 }
4850
Willy Tarreau13278b42017-10-13 19:23:14 +02004851 /* Skip StreamDep and weight for now (we don't support PRIORITY) */
4852 if (h2c->dff & H2_F_HEADERS_PRIORITY) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004853 if (read_n32(hdrs) == h2c->dsi) {
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004854 /* RFC7540#5.3.1 : stream dep may not depend on itself */
Willy Tarreau7838a792019-08-12 18:42:03 +02004855 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 +01004856 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004857 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreaua0d11b62018-09-05 18:30:05 +02004858 goto fail;
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004859 }
4860
Willy Tarreaua01f45e2018-12-31 07:41:24 +01004861 if (flen < 5) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004862 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 +01004863 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4864 goto fail;
4865 }
4866
Willy Tarreau13278b42017-10-13 19:23:14 +02004867 hdrs += 5; // stream dep = 4, weight = 1
4868 flen -= 5;
4869 }
4870
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004871 if (!h2_get_buf(h2c, rxbuf)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004872 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 +01004873 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau86277d42019-01-02 15:36:11 +01004874 goto leave;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004875 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004876
Willy Tarreau937f7602018-02-26 15:22:17 +01004877 /* we can't retry a failed decompression operation so we must be very
4878 * careful not to take any risks. In practice the output buffer is
4879 * always empty except maybe for trailers, in which case we simply have
4880 * to wait for the upper layer to finish consuming what is available.
4881 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004882 htx = htx_from_buf(rxbuf);
4883 if (!htx_is_empty(htx)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004884 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 +02004885 h2c->flags |= H2_CF_DEM_SFULL;
4886 goto leave;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004887 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004888
Willy Tarreau25919232019-01-03 14:48:18 +01004889 /* past this point we cannot roll back in case of error */
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004890 outlen = hpack_decode_frame(h2c->ddht, hdrs, flen, list,
4891 sizeof(list)/sizeof(list[0]), tmp);
4892 if (outlen < 0) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004893 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 +01004894 h2c_error(h2c, H2_ERR_COMPRESSION_ERROR);
4895 goto fail;
4896 }
4897
Willy Tarreau25919232019-01-03 14:48:18 +01004898 /* The PACK decompressor was updated, let's update the input buffer and
4899 * the parser's state to commit these changes and allow us to later
4900 * fail solely on the stream if needed.
4901 */
4902 b_del(&h2c->dbuf, h2c->dfl + hole);
4903 h2c->dfl = hole = 0;
4904 h2c->st0 = H2_CS_FRAME_H;
4905
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004906 /* OK now we have our header list in <list> */
Willy Tarreau880f5802019-01-03 08:10:14 +01004907 msgf = (h2c->dff & H2_F_HEADERS_END_STREAM) ? 0 : H2_MSGF_BODY;
Christopher Fauletd0db4232021-01-22 11:46:30 +01004908 msgf |= (*flags & H2_SF_BODY_TUNNEL) ? H2_MSGF_BODY_TUNNEL: 0;
Amaury Denoyelle74162742020-12-11 17:53:05 +01004909 /* If an Extended CONNECT has been sent on this stream, set message flag
Ilya Shipitsinacf84592021-02-06 22:29:08 +05004910 * to convert 200 response to 101 htx response */
Amaury Denoyelle74162742020-12-11 17:53:05 +01004911 msgf |= (*flags & H2_SF_EXT_CONNECT_SENT) ? H2_MSGF_EXT_CONNECT: 0;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004912
Willy Tarreau88d138e2019-01-02 19:38:14 +01004913 if (*flags & H2_SF_HEADERS_RCVD)
4914 goto trailers;
4915
4916 /* This is the first HEADERS frame so it's a headers block */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004917 if (h2c->flags & H2_CF_IS_BACK)
Amaury Denoyelle74162742020-12-11 17:53:05 +01004918 outlen = h2_make_htx_response(list, htx, &msgf, body_len, upgrade_protocol);
Christopher Faulet9b79a102019-07-15 11:22:56 +02004919 else
4920 outlen = h2_make_htx_request(list, htx, &msgf, body_len);
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004921
Christopher Faulet3d875582021-04-26 17:46:13 +02004922 if (outlen < 0 || htx_free_space(htx) < global.tune.maxrewrite) {
Willy Tarreau25919232019-01-03 14:48:18 +01004923 /* too large headers? this is a stream error only */
Christopher Faulet3d875582021-04-26 17:46:13 +02004924 TRACE_STATE("message headers too large", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2S_ERR|H2_EV_PROTO_ERR, h2c->conn);
4925 htx->flags |= HTX_FL_PARSING_ERROR;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004926 goto fail;
4927 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004928
Willy Tarreau174b06a2018-04-25 18:13:58 +02004929 if (msgf & H2_MSGF_BODY) {
4930 /* a payload is present */
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004931 if (msgf & H2_MSGF_BODY_CL) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004932 *flags |= H2_SF_DATA_CLEN;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004933 htx->extra = *body_len;
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004934 }
Willy Tarreau174b06a2018-04-25 18:13:58 +02004935 }
Christopher Faulet7d247f02020-12-02 14:26:36 +01004936 if (msgf & H2_MSGF_BODYLESS_RSP)
4937 *flags |= H2_SF_BODYLESS_RESP;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004938
Christopher Fauletd0db4232021-01-22 11:46:30 +01004939 if (msgf & H2_MSGF_BODY_TUNNEL)
4940 *flags |= H2_SF_BODY_TUNNEL;
4941 else {
4942 /* Abort the tunnel attempt, if any */
4943 if (*flags & H2_SF_BODY_TUNNEL)
4944 *flags |= H2_SF_TUNNEL_ABRT;
4945 *flags &= ~H2_SF_BODY_TUNNEL;
4946 }
4947
Willy Tarreau88d138e2019-01-02 19:38:14 +01004948 done:
Christopher Faulet0b465482019-02-19 15:14:23 +01004949 /* indicate that a HEADERS frame was received for this stream, except
4950 * for 1xx responses. For 1xx responses, another HEADERS frame is
4951 * expected.
4952 */
4953 if (!(msgf & H2_MSGF_RSP_1XX))
4954 *flags |= H2_SF_HEADERS_RCVD;
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004955
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004956 if (h2c->dff & H2_F_HEADERS_END_STREAM) {
Christopher Faulet2c681c62022-12-22 09:47:01 +01004957 if (msgf & H2_MSGF_RSP_1XX) {
4958 /* RFC9113#8.1 : HEADERS frame with the ES flag set that carries an informational status code is malformed */
4959 TRACE_STATE("invalid interim response with ES flag!", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn);
4960 goto fail;
4961 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004962 /* no more data are expected for this message */
4963 htx->flags |= HTX_FL_EOM;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004964 }
Willy Tarreau937f7602018-02-26 15:22:17 +01004965
Amaury Denoyelleefe22762020-12-11 17:53:08 +01004966 if (msgf & H2_MSGF_EXT_CONNECT)
4967 *flags |= H2_SF_EXT_CONNECT_RCVD;
4968
Willy Tarreau86277d42019-01-02 15:36:11 +01004969 /* success */
4970 ret = 1;
4971
Willy Tarreau68dd9852017-07-03 14:44:26 +02004972 leave:
Willy Tarreau86277d42019-01-02 15:36:11 +01004973 /* If there is a hole left and it's not at the end, we are forced to
Willy Tarreauea18f862018-12-22 20:19:26 +01004974 * move the remaining data over it.
4975 */
4976 if (hole) {
4977 if (b_data(&h2c->dbuf) > h2c->dfl + hole)
4978 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole),
4979 b_data(&h2c->dbuf) - (h2c->dfl + hole), -hole);
4980 b_sub(&h2c->dbuf, hole);
4981 }
4982
Christopher Faulet07f88d72021-04-21 10:39:53 +02004983 if (b_full(&h2c->dbuf) && h2c->dfl) {
Willy Tarreauea18f862018-12-22 20:19:26 +01004984 /* too large frames */
4985 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau86277d42019-01-02 15:36:11 +01004986 ret = -1;
Willy Tarreauea18f862018-12-22 20:19:26 +01004987 }
4988
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004989 if (htx)
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004990 htx_to_buf(htx, rxbuf);
Willy Tarreau68dd9852017-07-03 14:44:26 +02004991 free_trash_chunk(copy);
Willy Tarreau7838a792019-08-12 18:42:03 +02004992 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau86277d42019-01-02 15:36:11 +01004993 return ret;
4994
Willy Tarreau68dd9852017-07-03 14:44:26 +02004995 fail:
Willy Tarreau86277d42019-01-02 15:36:11 +01004996 ret = -1;
Willy Tarreau68dd9852017-07-03 14:44:26 +02004997 goto leave;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004998
4999 trailers:
5000 /* This is the last HEADERS frame hence a trailer */
Willy Tarreau88d138e2019-01-02 19:38:14 +01005001 if (!(h2c->dff & H2_F_HEADERS_END_STREAM)) {
5002 /* It's a trailer but it's missing ES flag */
Willy Tarreau7838a792019-08-12 18:42:03 +02005003 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 +01005004 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02005005 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau88d138e2019-01-02 19:38:14 +01005006 goto fail;
5007 }
5008
Christopher Faulet9b79a102019-07-15 11:22:56 +02005009 /* Trailers terminate a DATA sequence */
Willy Tarreau7838a792019-08-12 18:42:03 +02005010 if (h2_make_htx_trailers(list, htx) <= 0) {
5011 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 +02005012 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005013 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01005014 goto done;
Willy Tarreau13278b42017-10-13 19:23:14 +02005015}
5016
Christopher Faulet9b79a102019-07-15 11:22:56 +02005017/* Transfer the payload of a DATA frame to the HTTP/1 side. The HTTP/2 frame
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005018 * parser state is automatically updated. Returns > 0 if it could completely
5019 * send the current frame, 0 if it couldn't complete, in which case
5020 * CS_FL_RCV_MORE must be checked to know if some data remain pending (an empty
5021 * DATA frame can return 0 as a valid result). Stream errors are reported in
5022 * h2s->errcode and connection errors in h2c->errcode. The caller must already
5023 * have checked the frame header and ensured that the frame was complete or the
5024 * buffer full. It changes the frame state to FRAME_A once done.
Willy Tarreau454f9052017-10-26 19:40:35 +02005025 */
Willy Tarreau454b57b2018-02-26 15:50:05 +01005026static int h2_frt_transfer_data(struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02005027{
5028 struct h2c *h2c = h2s->h2c;
Christopher Faulet9b79a102019-07-15 11:22:56 +02005029 int block;
Willy Tarreaud755ea62018-02-26 15:44:54 +01005030 unsigned int flen = 0;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005031 struct htx *htx = NULL;
Willy Tarreaud755ea62018-02-26 15:44:54 +01005032 struct buffer *csbuf;
Christopher Faulet9b79a102019-07-15 11:22:56 +02005033 unsigned int sent;
Willy Tarreau454f9052017-10-26 19:40:35 +02005034
Willy Tarreau7838a792019-08-12 18:42:03 +02005035 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
5036
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005037 h2c->flags &= ~H2_CF_DEM_SFULL;
Willy Tarreau454f9052017-10-26 19:40:35 +02005038
Olivier Houchard638b7992018-08-16 15:41:52 +02005039 csbuf = h2_get_buf(h2c, &h2s->rxbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01005040 if (!csbuf) {
5041 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02005042 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 +01005043 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01005044 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02005045 htx = htx_from_buf(csbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01005046
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005047try_again:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005048 flen = h2c->dfl - h2c->dpl;
5049 if (!flen)
Willy Tarreau4a28da12018-01-04 14:41:00 +01005050 goto end_transfer;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005051
Willy Tarreauc9fa0482018-07-10 17:43:27 +02005052 if (flen > b_data(&h2c->dbuf)) {
5053 flen = b_data(&h2c->dbuf);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005054 if (!flen)
Willy Tarreau454b57b2018-02-26 15:50:05 +01005055 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01005056 }
5057
Christopher Faulet9b79a102019-07-15 11:22:56 +02005058 block = htx_free_data_space(htx);
5059 if (!block) {
5060 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005061 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 +02005062 goto fail;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005063 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02005064 if (flen > block)
5065 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005066
Christopher Faulet9b79a102019-07-15 11:22:56 +02005067 /* here, flen is the max we can copy into the output buffer */
5068 block = b_contig_data(&h2c->dbuf, 0);
5069 if (flen > block)
5070 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005071
Christopher Faulet9b79a102019-07-15 11:22:56 +02005072 sent = htx_add_data(htx, ist2(b_head(&h2c->dbuf), flen));
Willy Tarreau022e5e52020-09-10 09:33:15 +02005073 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 +02005074
Christopher Faulet9b79a102019-07-15 11:22:56 +02005075 b_del(&h2c->dbuf, sent);
5076 h2c->dfl -= sent;
5077 h2c->rcvd_c += sent;
5078 h2c->rcvd_s += sent; // warning, this can also affect the closed streams!
Willy Tarreau454f9052017-10-26 19:40:35 +02005079
Christopher Faulet9b79a102019-07-15 11:22:56 +02005080 if (h2s->flags & H2_SF_DATA_CLEN) {
5081 h2s->body_len -= sent;
5082 htx->extra = h2s->body_len;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005083 }
5084
Christopher Faulet9b79a102019-07-15 11:22:56 +02005085 if (sent < flen) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01005086 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005087 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 +01005088 goto fail;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005089 }
5090
Christopher Faulet9b79a102019-07-15 11:22:56 +02005091 goto try_again;
5092
Willy Tarreau4a28da12018-01-04 14:41:00 +01005093 end_transfer:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005094 /* here we're done with the frame, all the payload (except padding) was
5095 * transferred.
5096 */
Willy Tarreaueba10f22018-04-25 20:44:22 +02005097
Christopher Faulet5be651d2021-01-22 15:28:03 +01005098 if (!(h2s->flags & H2_SF_BODY_TUNNEL) && (h2c->dff & H2_F_DATA_END_STREAM)) {
5099 /* no more data are expected for this message. This add the EOM
5100 * flag but only on the response path or if no tunnel attempt
5101 * was aborted. Otherwise (request path + tunnel abrted), the
5102 * EOM was already reported.
5103 */
Christopher Faulet33724322021-02-10 09:04:59 +01005104 if ((h2c->flags & H2_CF_IS_BACK) || !(h2s->flags & H2_SF_TUNNEL_ABRT)) {
5105 /* If we receive an empty DATA frame with ES flag while the HTX
5106 * message is empty, we must be sure to push a block to be sure
5107 * the HTX EOM flag will be handled on the other side. It is a
5108 * workaround because for now it is not possible to push empty
5109 * HTX DATA block. And without this block, there is no way to
5110 * "commit" the end of the message.
5111 */
5112 if (htx_is_empty(htx)) {
5113 if (!htx_add_endof(htx, HTX_BLK_EOT))
5114 goto fail;
5115 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005116 htx->flags |= HTX_FL_EOM;
Christopher Faulet33724322021-02-10 09:04:59 +01005117 }
Willy Tarreaueba10f22018-04-25 20:44:22 +02005118 }
5119
Willy Tarreaud1023bb2018-03-22 16:53:12 +01005120 h2c->rcvd_c += h2c->dpl;
5121 h2c->rcvd_s += h2c->dpl;
5122 h2c->dpl = 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02005123 h2c->st0 = H2_CS_FRAME_A; // send the corresponding window update
Christopher Faulet9b79a102019-07-15 11:22:56 +02005124 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02005125 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005126 return 1;
Willy Tarreau454b57b2018-02-26 15:50:05 +01005127 fail:
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005128 if (htx)
5129 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02005130 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454b57b2018-02-26 15:50:05 +01005131 return 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02005132}
5133
Willy Tarreau115e83b2018-12-01 19:17:53 +01005134/* Try to send a HEADERS frame matching HTX response present in HTX message
5135 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
5136 * must check the stream's status to detect any error which might have happened
5137 * subsequently to a successful send. The htx blocks are automatically removed
5138 * from the message. The htx message is assumed to be valid since produced from
5139 * the internal code, hence it contains a start line, an optional series of
5140 * header blocks and an end of header, otherwise an invalid frame could be
5141 * emitted and the resulting htx message could be left in an inconsistent state.
5142 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005143static size_t h2s_frt_make_resp_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005144{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005145 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau115e83b2018-12-01 19:17:53 +01005146 struct h2c *h2c = h2s->h2c;
5147 struct htx_blk *blk;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005148 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005149 struct buffer *mbuf;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005150 struct htx_sl *sl;
5151 enum htx_blk_type type;
5152 int es_now = 0;
5153 int ret = 0;
5154 int hdr;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005155
Willy Tarreau7838a792019-08-12 18:42:03 +02005156 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5157
Willy Tarreau115e83b2018-12-01 19:17:53 +01005158 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005159 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005160 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005161 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005162 return 0;
5163 }
5164
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005165 /* get the start line (we do have one) and the rest of the headers,
5166 * that we dump starting at header 0 */
5167 sl = NULL;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005168 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005169 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau115e83b2018-12-01 19:17:53 +01005170 type = htx_get_blk_type(blk);
5171
5172 if (type == HTX_BLK_UNUSED)
5173 continue;
5174
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005175 if (type == HTX_BLK_EOH)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005176 break;
5177
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005178 if (type == HTX_BLK_HDR) {
Christopher Faulet56498132021-01-29 11:39:43 +01005179 BUG_ON(!sl); /* The start-line mut be defined before any headers */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005180 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5181 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5182 goto fail;
5183 }
5184
5185 list[hdr].n = htx_get_blk_name(htx, blk);
5186 list[hdr].v = htx_get_blk_value(htx, blk);
5187 hdr++;
5188 }
5189 else if (type == HTX_BLK_RES_SL) {
Christopher Faulet56498132021-01-29 11:39:43 +01005190 BUG_ON(sl); /* Only one start-line expected */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005191 sl = htx_get_blk_ptr(htx, blk);
5192 h2s->status = sl->info.res.status;
Christopher Faulet7d247f02020-12-02 14:26:36 +01005193 if (h2s->status == 204 || h2s->status == 304)
5194 h2s->flags |= H2_SF_BODYLESS_RESP;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005195 if (h2s->status < 100 || h2s->status > 999) {
5196 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5197 goto fail;
5198 }
5199 else if (h2s->status == 101) {
Amaury Denoyelleefe22762020-12-11 17:53:08 +01005200 if (unlikely(h2s->flags & H2_SF_EXT_CONNECT_RCVD)) {
5201 /* If an Extended CONNECT has been received, we need to convert 101 to 200 */
5202 h2s->status = 200;
5203 h2s->flags &= ~H2_SF_EXT_CONNECT_RCVD;
5204 }
5205 else {
5206 /* Otherwise, 101 responses are not supported in H2, so return a error (RFC7540#8.1.1) */
5207 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5208 goto fail;
5209 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005210 }
5211 else if ((h2s->flags & H2_SF_BODY_TUNNEL) && h2s->status >= 300) {
5212 /* Abort the tunnel attempt */
5213 h2s->flags &= ~H2_SF_BODY_TUNNEL;
5214 h2s->flags |= H2_SF_TUNNEL_ABRT;
5215 }
5216 }
5217 else {
5218 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 +01005219 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005220 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005221 }
5222
Christopher Faulet56498132021-01-29 11:39:43 +01005223 /* The start-line me be defined */
5224 BUG_ON(!sl);
5225
Willy Tarreau115e83b2018-12-01 19:17:53 +01005226 /* marker for end of headers */
5227 list[hdr].n = ist("");
5228
Willy Tarreau9c218e72019-05-26 10:08:28 +02005229 mbuf = br_tail(h2c->mbuf);
5230 retry:
5231 if (!h2_get_buf(h2c, mbuf)) {
5232 h2c->flags |= H2_CF_MUX_MALLOC;
5233 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005234 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 +02005235 return 0;
5236 }
5237
Willy Tarreau115e83b2018-12-01 19:17:53 +01005238 chunk_reset(&outbuf);
5239
5240 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005241 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5242 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005243 break;
5244 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005245 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau115e83b2018-12-01 19:17:53 +01005246 }
5247
5248 if (outbuf.size < 9)
5249 goto full;
5250
5251 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5252 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5253 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5254 outbuf.data = 9;
5255
Willy Tarreau8a4dca02022-01-13 16:00:12 +01005256 if ((h2c->flags & (H2_CF_SHTS_UPDATED|H2_CF_DTSU_EMITTED)) == H2_CF_SHTS_UPDATED) {
5257 /* SETTINGS_HEADER_TABLE_SIZE changed, we must send an HPACK
5258 * dynamic table size update so that some clients are not
5259 * confused. In practice we only need to send the DTSU when the
5260 * advertised size is lower than the current one, and since we
5261 * don't use it and don't care about the default 4096 bytes,
5262 * we only ack it with a zero size thus we at most have to deal
5263 * with this once. See RFC7541#4.2 and #6.3 for the spec, and
5264 * below for the whole context and interoperability risks:
5265 * https://lists.w3.org/Archives/Public/ietf-http-wg/2021OctDec/0235.html
5266 */
5267 if (b_room(&outbuf) < 1)
5268 goto full;
5269 outbuf.area[outbuf.data++] = 0x20; // HPACK DTSU 0 bytes
5270
5271 /* let's not update the flags now but only once the buffer is
5272 * really committed.
5273 */
5274 }
5275
Willy Tarreau115e83b2018-12-01 19:17:53 +01005276 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01005277 if (!hpack_encode_int_status(&outbuf, h2s->status)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005278 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005279 goto realign_again;
5280 goto full;
5281 }
5282
5283 /* encode all headers, stop at empty name */
5284 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
5285 /* these ones do not exist in H2 and must be dropped. */
5286 if (isteq(list[hdr].n, ist("connection")) ||
5287 isteq(list[hdr].n, ist("proxy-connection")) ||
5288 isteq(list[hdr].n, ist("keep-alive")) ||
5289 isteq(list[hdr].n, ist("upgrade")) ||
5290 isteq(list[hdr].n, ist("transfer-encoding")))
5291 continue;
5292
Christopher Faulet86d144c2019-08-14 16:32:25 +02005293 /* Skip all pseudo-headers */
5294 if (*(list[hdr].n.ptr) == ':')
5295 continue;
5296
Willy Tarreau115e83b2018-12-01 19:17:53 +01005297 if (isteq(list[hdr].n, ist("")))
5298 break; // end
5299
5300 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
5301 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005302 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005303 goto realign_again;
5304 goto full;
5305 }
5306 }
5307
Willy Tarreaucb985a42019-10-07 16:56:34 +02005308 /* update the frame's size */
5309 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5310
5311 if (outbuf.data > h2c->mfs + 9) {
5312 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5313 /* output full */
5314 if (b_space_wraps(mbuf))
5315 goto realign_again;
5316 goto full;
5317 }
5318 }
5319
Willy Tarreau38b5bec2021-06-17 08:40:04 +02005320 TRACE_USER("sent H2 response ", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
5321
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005322 /* remove all header blocks including the EOH and compute the
5323 * corresponding size.
Willy Tarreau115e83b2018-12-01 19:17:53 +01005324 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005325 ret = 0;
5326 blk = htx_get_head_blk(htx);
5327 while (blk) {
5328 type = htx_get_blk_type(blk);
5329 ret += htx_get_blksz(blk);
5330 blk = htx_remove_blk(htx, blk);
5331 /* The removed block is the EOH */
5332 if (type == HTX_BLK_EOH)
5333 break;
Christopher Faulet5be651d2021-01-22 15:28:03 +01005334 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005335
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005336 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW) {
5337 /* Response already closed: add END_STREAM */
5338 es_now = 1;
5339 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005340 else if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx) && h2s->status >= 200) {
5341 /* EOM+empty: we may need to add END_STREAM except for 1xx
Christopher Faulet991febd2020-12-02 15:17:31 +01005342 * responses and tunneled response.
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005343 */
Christopher Faulet991febd2020-12-02 15:17:31 +01005344 if (!(h2s->flags & H2_SF_BODY_TUNNEL) || h2s->status >= 300)
5345 es_now = 1;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005346 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005347
Willy Tarreau115e83b2018-12-01 19:17:53 +01005348 if (es_now)
5349 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5350
5351 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005352 b_add(mbuf, outbuf.data);
Christopher Faulet0b465482019-02-19 15:14:23 +01005353
5354 /* indicates the HEADERS frame was sent, except for 1xx responses. For
5355 * 1xx responses, another HEADERS frame is expected.
5356 */
Christopher Faulet89899422020-12-07 18:24:43 +01005357 if (h2s->status >= 200)
Christopher Faulet0b465482019-02-19 15:14:23 +01005358 h2s->flags |= H2_SF_HEADERS_SENT;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005359
Willy Tarreau8a4dca02022-01-13 16:00:12 +01005360 if (h2c->flags & H2_CF_SHTS_UPDATED) {
5361 /* was sent above */
5362 h2c->flags |= H2_CF_DTSU_EMITTED;
Willy Tarreaub05f4dd2022-02-16 14:28:14 +01005363 h2c->flags &= ~H2_CF_SHTS_UPDATED;
Willy Tarreau8a4dca02022-01-13 16:00:12 +01005364 }
5365
Willy Tarreau115e83b2018-12-01 19:17:53 +01005366 if (es_now) {
5367 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005368 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 +01005369 if (h2s->st == H2_SS_OPEN)
5370 h2s->st = H2_SS_HLOC;
5371 else
5372 h2s_close(h2s);
5373 }
5374
5375 /* OK we could properly deliver the response */
Willy Tarreau115e83b2018-12-01 19:17:53 +01005376 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005377 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005378 return ret;
5379 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005380 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5381 goto retry;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005382 h2c->flags |= H2_CF_MUX_MFULL;
5383 h2s->flags |= H2_SF_BLK_MROOM;
5384 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005385 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 +01005386 goto end;
5387 fail:
5388 /* unparsable HTX messages, too large ones to be produced in the local
5389 * list etc go here (unrecoverable errors).
5390 */
5391 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5392 ret = 0;
5393 goto end;
5394}
5395
Willy Tarreau80739692018-10-05 11:35:57 +02005396/* Try to send a HEADERS frame matching HTX request present in HTX message
5397 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
5398 * must check the stream's status to detect any error which might have happened
5399 * subsequently to a successful send. The htx blocks are automatically removed
5400 * from the message. The htx message is assumed to be valid since produced from
5401 * the internal code, hence it contains a start line, an optional series of
5402 * header blocks and an end of header, otherwise an invalid frame could be
5403 * emitted and the resulting htx message could be left in an inconsistent state.
5404 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005405static size_t h2s_bck_make_req_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau80739692018-10-05 11:35:57 +02005406{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005407 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau80739692018-10-05 11:35:57 +02005408 struct h2c *h2c = h2s->h2c;
5409 struct htx_blk *blk;
Willy Tarreau80739692018-10-05 11:35:57 +02005410 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005411 struct buffer *mbuf;
Willy Tarreau80739692018-10-05 11:35:57 +02005412 struct htx_sl *sl;
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005413 struct ist meth, uri, auth, host = IST_NULL;
Willy Tarreau80739692018-10-05 11:35:57 +02005414 enum htx_blk_type type;
5415 int es_now = 0;
5416 int ret = 0;
5417 int hdr;
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005418 int extended_connect = 0;
Willy Tarreau80739692018-10-05 11:35:57 +02005419
Willy Tarreau7838a792019-08-12 18:42:03 +02005420 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5421
Willy Tarreau80739692018-10-05 11:35:57 +02005422 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005423 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02005424 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005425 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02005426 return 0;
5427 }
5428
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005429 /* get the start line (we do have one) and the rest of the headers,
5430 * that we dump starting at header 0 */
5431 sl = NULL;
Willy Tarreau80739692018-10-05 11:35:57 +02005432 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005433 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005434 type = htx_get_blk_type(blk);
5435
5436 if (type == HTX_BLK_UNUSED)
5437 continue;
5438
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005439 if (type == HTX_BLK_EOH)
Willy Tarreau80739692018-10-05 11:35:57 +02005440 break;
5441
Christopher Fauletc29b4bf2021-01-29 11:49:16 +01005442 if (type == HTX_BLK_HDR) {
Christopher Faulet56498132021-01-29 11:39:43 +01005443 BUG_ON(!sl); /* The start-line mut be defined before any headers */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005444 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5445 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5446 goto fail;
5447 }
Willy Tarreau80739692018-10-05 11:35:57 +02005448
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005449 list[hdr].n = htx_get_blk_name(htx, blk);
5450 list[hdr].v = htx_get_blk_value(htx, blk);
Christopher Faulet67d58092019-10-02 10:51:38 +02005451
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005452 /* Skip header if same name is used to add the server name */
5453 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name &&
5454 isteq(list[hdr].n, ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len)))
5455 continue;
Christopher Faulet67d58092019-10-02 10:51:38 +02005456
Ilya Shipitsinacf84592021-02-06 22:29:08 +05005457 /* Convert connection: upgrade to Extended connect from rfc 8441 */
Christopher Faulet673504a2021-09-09 09:52:51 +02005458 if ((sl->flags & HTX_SL_F_CONN_UPG) && isteqi(list[hdr].n, ist("connection"))) {
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005459 /* rfc 7230 #6.1 Connection = list of tokens */
5460 struct ist connection_ist = list[hdr].v;
5461 do {
5462 if (isteqi(iststop(connection_ist, ','),
5463 ist("upgrade"))) {
Amaury Denoyelle68993a12021-10-18 09:43:29 +02005464 if (!(h2c->flags & H2_CF_RCVD_RFC8441)) {
5465 TRACE_STATE("reject upgrade because of no RFC8441 support", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5466 goto fail;
5467 }
5468
Amaury Denoyellea1fa1542021-10-18 10:05:16 +02005469 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 +01005470 h2s->flags |= (H2_SF_BODY_TUNNEL|H2_SF_EXT_CONNECT_SENT);
5471 sl->info.req.meth = HTTP_METH_CONNECT;
5472 meth = ist("CONNECT");
5473
5474 extended_connect = 1;
5475 break;
5476 }
5477
5478 connection_ist = istadv(istfind(connection_ist, ','), 1);
5479 } while (istlen(connection_ist));
5480 }
5481
Christopher Faulet673504a2021-09-09 09:52:51 +02005482 if ((sl->flags & HTX_SL_F_CONN_UPG) && isteq(list[hdr].n, ist("upgrade"))) {
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005483 /* rfc 7230 #6.7 Upgrade = list of protocols
5484 * rfc 8441 #4 Extended connect = :protocol is single-valued
5485 *
5486 * only first HTTP/1 protocol is preserved
5487 */
5488 const struct ist protocol = iststop(list[hdr].v, ',');
5489 /* upgrade_protocol field is 16 bytes long in h2s */
5490 istpad(h2s->upgrade_protocol, isttrim(protocol, 15));
5491 }
5492
5493 if (isteq(list[hdr].n, ist("host")))
5494 host = list[hdr].v;
5495
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005496 hdr++;
5497 }
Christopher Fauletc29b4bf2021-01-29 11:49:16 +01005498 else if (type == HTX_BLK_REQ_SL) {
5499 BUG_ON(sl); /* Only one start-line expected */
5500 sl = htx_get_blk_ptr(htx, blk);
5501 meth = htx_sl_req_meth(sl);
5502 uri = htx_sl_req_uri(sl);
5503 if (sl->info.req.meth == HTTP_METH_HEAD)
5504 h2s->flags |= H2_SF_BODYLESS_RESP;
5505 if (unlikely(uri.len == 0)) {
5506 TRACE_ERROR("no URI in HTX request", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5507 goto fail;
5508 }
5509 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005510 else {
5511 TRACE_ERROR("will not encode unexpected htx block", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5512 goto fail;
5513 }
Willy Tarreau80739692018-10-05 11:35:57 +02005514 }
5515
Christopher Faulet56498132021-01-29 11:39:43 +01005516 /* The start-line me be defined */
5517 BUG_ON(!sl);
5518
Christopher Faulet72ba6cd2019-09-24 16:20:05 +02005519 /* Now add the server name to a header (if requested) */
5520 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name) {
5521 struct server *srv = objt_server(h2c->conn->target);
5522
5523 if (srv) {
5524 list[hdr].n = ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len);
5525 list[hdr].v = ist(srv->id);
5526 hdr++;
5527 }
5528 }
5529
Willy Tarreau80739692018-10-05 11:35:57 +02005530 /* marker for end of headers */
5531 list[hdr].n = ist("");
5532
Willy Tarreau9c218e72019-05-26 10:08:28 +02005533 mbuf = br_tail(h2c->mbuf);
5534 retry:
5535 if (!h2_get_buf(h2c, mbuf)) {
5536 h2c->flags |= H2_CF_MUX_MALLOC;
5537 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005538 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 +02005539 return 0;
5540 }
5541
Willy Tarreau80739692018-10-05 11:35:57 +02005542 chunk_reset(&outbuf);
5543
5544 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005545 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5546 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005547 break;
5548 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005549 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau80739692018-10-05 11:35:57 +02005550 }
5551
5552 if (outbuf.size < 9)
5553 goto full;
5554
5555 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5556 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5557 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5558 outbuf.data = 9;
5559
5560 /* encode the method, which necessarily is the first one */
Willy Tarreaubdabc3a2018-12-10 18:25:11 +01005561 if (!hpack_encode_method(&outbuf, sl->info.req.meth, meth)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005562 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005563 goto realign_again;
5564 goto full;
5565 }
5566
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005567 auth = ist(NULL);
5568
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005569 /* RFC7540 #8.3: the CONNECT method must have :
5570 * - :authority set to the URI part (host:port)
5571 * - :method set to CONNECT
5572 * - :scheme and :path omitted
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005573 *
5574 * Note that this is not applicable in case of the Extended CONNECT
5575 * protocol from rfc 8441.
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005576 */
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005577 if (unlikely(sl->info.req.meth == HTTP_METH_CONNECT) && !extended_connect) {
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005578 auth = uri;
5579
5580 if (!hpack_encode_header(&outbuf, ist(":authority"), auth)) {
5581 /* output full */
5582 if (b_space_wraps(mbuf))
5583 goto realign_again;
5584 goto full;
5585 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005586 h2s->flags |= H2_SF_BODY_TUNNEL;
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005587 } else {
5588 /* other methods need a :scheme. If an authority is known from
5589 * the request line, it must be sent, otherwise only host is
5590 * sent. Host is never sent as the authority.
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005591 *
5592 * This code is also applicable for Extended CONNECT protocol
5593 * from rfc 8441.
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005594 */
5595 struct ist scheme = { };
Christopher Faulet3b44c542019-06-14 10:46:51 +02005596
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005597 if (uri.ptr[0] != '/' && uri.ptr[0] != '*') {
5598 /* the URI seems to start with a scheme */
5599 int len = 1;
5600
5601 while (len < uri.len && uri.ptr[len] != ':')
5602 len++;
5603
5604 if (len + 2 < uri.len && uri.ptr[len + 1] == '/' && uri.ptr[len + 2] == '/') {
5605 /* make the uri start at the authority now */
Tim Duesterhus9f75ed12021-03-02 18:57:26 +01005606 scheme = ist2(uri.ptr, len);
Tim Duesterhus154374c2021-03-02 18:57:27 +01005607 uri = istadv(uri, len + 3);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005608
5609 /* find the auth part of the URI */
Tim Duesterhus92c696e2021-02-28 16:11:36 +01005610 auth = ist2(uri.ptr, 0);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005611 while (auth.len < uri.len && auth.ptr[auth.len] != '/')
5612 auth.len++;
5613
Tim Duesterhus154374c2021-03-02 18:57:27 +01005614 uri = istadv(uri, auth.len);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005615 }
5616 }
5617
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005618 /* For Extended CONNECT, the :authority must be present.
5619 * Use host value for it.
5620 */
5621 if (unlikely(extended_connect) && isttest(host))
5622 auth = host;
5623
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005624 if (!scheme.len) {
5625 /* no explicit scheme, we're using an origin-form URI,
5626 * probably from an H1 request transcoded to H2 via an
5627 * external layer, then received as H2 without authority.
5628 * So we have to look up the scheme from the HTX flags.
5629 * In such a case only http and https are possible, and
5630 * https is the default (sent by browsers).
5631 */
5632 if ((sl->flags & (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP)) == (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP))
5633 scheme = ist("http");
5634 else
5635 scheme = ist("https");
5636 }
Christopher Faulet3b44c542019-06-14 10:46:51 +02005637
5638 if (!hpack_encode_scheme(&outbuf, scheme)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005639 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005640 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005641 goto realign_again;
5642 goto full;
5643 }
Willy Tarreau80739692018-10-05 11:35:57 +02005644
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005645 if (auth.len && !hpack_encode_header(&outbuf, ist(":authority"), auth)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005646 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005647 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005648 goto realign_again;
5649 goto full;
5650 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005651
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005652 /* encode the path. RFC7540#8.1.2.3: if path is empty it must
5653 * be sent as '/' or '*'.
5654 */
5655 if (unlikely(!uri.len)) {
5656 if (sl->info.req.meth == HTTP_METH_OPTIONS)
5657 uri = ist("*");
5658 else
5659 uri = ist("/");
Willy Tarreau053c1572019-02-01 16:13:59 +01005660 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005661
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005662 if (!hpack_encode_path(&outbuf, uri)) {
5663 /* output full */
5664 if (b_space_wraps(mbuf))
5665 goto realign_again;
5666 goto full;
5667 }
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005668
5669 /* encode the pseudo-header protocol from rfc8441 if using
5670 * Extended CONNECT method.
5671 */
5672 if (unlikely(extended_connect)) {
5673 const struct ist protocol = ist(h2s->upgrade_protocol);
5674 if (isttest(protocol)) {
5675 if (!hpack_encode_header(&outbuf,
5676 ist(":protocol"),
5677 protocol)) {
5678 /* output full */
5679 if (b_space_wraps(mbuf))
5680 goto realign_again;
5681 goto full;
5682 }
5683 }
5684 }
Willy Tarreau80739692018-10-05 11:35:57 +02005685 }
5686
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005687 /* encode all headers, stop at empty name. Host is only sent if we
5688 * do not provide an authority.
5689 */
Willy Tarreau80739692018-10-05 11:35:57 +02005690 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005691 struct ist n = list[hdr].n;
5692 struct ist v = list[hdr].v;
5693
Willy Tarreau80739692018-10-05 11:35:57 +02005694 /* these ones do not exist in H2 and must be dropped. */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005695 if (isteq(n, ist("connection")) ||
5696 (auth.len && isteq(n, ist("host"))) ||
5697 isteq(n, ist("proxy-connection")) ||
5698 isteq(n, ist("keep-alive")) ||
5699 isteq(n, ist("upgrade")) ||
5700 isteq(n, ist("transfer-encoding")))
Willy Tarreau80739692018-10-05 11:35:57 +02005701 continue;
5702
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005703 if (isteq(n, ist("te"))) {
5704 /* "te" may only be sent with "trailers" if this value
5705 * is present, otherwise it must be deleted.
5706 */
5707 v = istist(v, ist("trailers"));
Tim Duesterhus7b5777d2021-03-02 18:57:28 +01005708 if (!isttest(v) || (v.len > 8 && v.ptr[8] != ','))
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005709 continue;
5710 v = ist("trailers");
5711 }
5712
Christopher Faulet86d144c2019-08-14 16:32:25 +02005713 /* Skip all pseudo-headers */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005714 if (*(n.ptr) == ':')
Christopher Faulet86d144c2019-08-14 16:32:25 +02005715 continue;
5716
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005717 if (isteq(n, ist("")))
Willy Tarreau80739692018-10-05 11:35:57 +02005718 break; // end
5719
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005720 if (!hpack_encode_header(&outbuf, n, v)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005721 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005722 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005723 goto realign_again;
5724 goto full;
5725 }
5726 }
5727
Willy Tarreaucb985a42019-10-07 16:56:34 +02005728 /* update the frame's size */
5729 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5730
5731 if (outbuf.data > h2c->mfs + 9) {
5732 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5733 /* output full */
5734 if (b_space_wraps(mbuf))
5735 goto realign_again;
5736 goto full;
5737 }
5738 }
5739
Willy Tarreau38b5bec2021-06-17 08:40:04 +02005740 TRACE_USER("sent H2 request ", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
5741
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005742 /* remove all header blocks including the EOH and compute the
5743 * corresponding size.
Willy Tarreau80739692018-10-05 11:35:57 +02005744 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005745 ret = 0;
5746 blk = htx_get_head_blk(htx);
5747 while (blk) {
5748 type = htx_get_blk_type(blk);
5749 ret += htx_get_blksz(blk);
5750 blk = htx_remove_blk(htx, blk);
5751 /* The removed block is the EOH */
5752 if (type == HTX_BLK_EOH)
5753 break;
Christopher Fauletd0db4232021-01-22 11:46:30 +01005754 }
Willy Tarreau80739692018-10-05 11:35:57 +02005755
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005756 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW) {
5757 /* Request already closed: add END_STREAM */
Willy Tarreau80739692018-10-05 11:35:57 +02005758 es_now = 1;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005759 }
5760 if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx)) {
5761 /* EOM+empty: we may need to add END_STREAM (except for CONNECT
5762 * request)
5763 */
5764 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5765 es_now = 1;
5766 }
Willy Tarreau80739692018-10-05 11:35:57 +02005767
Willy Tarreau80739692018-10-05 11:35:57 +02005768 if (es_now)
5769 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5770
5771 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005772 b_add(mbuf, outbuf.data);
Willy Tarreau80739692018-10-05 11:35:57 +02005773 h2s->flags |= H2_SF_HEADERS_SENT;
5774 h2s->st = H2_SS_OPEN;
5775
Willy Tarreau80739692018-10-05 11:35:57 +02005776 if (es_now) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005777 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 +02005778 // trim any possibly pending data (eg: inconsistent content-length)
5779 h2s->flags |= H2_SF_ES_SENT;
5780 h2s->st = H2_SS_HLOC;
5781 }
5782
Willy Tarreau80739692018-10-05 11:35:57 +02005783 end:
5784 return ret;
5785 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005786 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5787 goto retry;
Willy Tarreau80739692018-10-05 11:35:57 +02005788 h2c->flags |= H2_CF_MUX_MFULL;
5789 h2s->flags |= H2_SF_BLK_MROOM;
5790 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005791 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 +02005792 goto end;
5793 fail:
5794 /* unparsable HTX messages, too large ones to be produced in the local
5795 * list etc go here (unrecoverable errors).
5796 */
5797 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5798 ret = 0;
5799 goto end;
5800}
5801
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005802/* Try to send a DATA frame matching HTTP response present in HTX structure
Willy Tarreau98de12a2018-12-12 07:03:00 +01005803 * present in <buf>, for stream <h2s>. Returns the number of bytes sent. The
5804 * caller must check the stream's status to detect any error which might have
5805 * happened subsequently to a successful send. Returns the number of data bytes
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005806 * consumed, or zero if nothing done.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005807 */
Christopher Faulet142854b2020-12-02 15:12:40 +01005808static size_t h2s_make_data(struct h2s *h2s, struct buffer *buf, size_t count)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005809{
5810 struct h2c *h2c = h2s->h2c;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005811 struct htx *htx;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005812 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005813 struct buffer *mbuf;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005814 size_t total = 0;
5815 int es_now = 0;
5816 int bsize; /* htx block size */
5817 int fsize; /* h2 frame size */
5818 struct htx_blk *blk;
5819 enum htx_blk_type type;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005820 int trunc_out; /* non-zero if truncated on out buf */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005821
Willy Tarreau7838a792019-08-12 18:42:03 +02005822 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5823
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005824 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005825 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005826 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005827 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005828 goto end;
5829 }
5830
Willy Tarreau98de12a2018-12-12 07:03:00 +01005831 htx = htx_from_buf(buf);
5832
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005833 /* We only come here with HTX_BLK_DATA blocks */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005834
5835 new_frame:
Willy Tarreauee573762018-12-04 15:25:57 +01005836 if (!count || htx_is_empty(htx))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005837 goto end;
5838
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005839 if ((h2c->flags & H2_CF_IS_BACK) &&
Christopher Fauletf95f8762021-01-22 11:59:07 +01005840 (h2s->flags & (H2_SF_HEADERS_RCVD|H2_SF_BODY_TUNNEL)) == H2_SF_BODY_TUNNEL) {
5841 /* The response HEADERS frame not received yet. Thus the tunnel
5842 * is not fully established yet. In this situation, we block
5843 * data sending.
5844 */
5845 h2s->flags |= H2_SF_BLK_MBUSY;
5846 TRACE_STATE("Request DATA frame blocked waiting for tunnel establishment", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5847 goto end;
5848 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01005849 else if ((h2c->flags & H2_CF_IS_BACK) && (h2s->flags & H2_SF_TUNNEL_ABRT)) {
5850 /* a tunnel attempt was aborted but the is pending raw data to xfer to the server.
5851 * Thus the stream is closed with the CANCEL error. The error will be reported to
5852 * the upper layer as aserver abort. But at this stage there is nothing more we can
5853 * do. We just wait for the end of the response to be sure to not truncate it.
5854 */
5855 if (!(h2s->flags & H2_SF_ES_RCVD)) {
5856 TRACE_STATE("Request DATA frame blocked waiting end of aborted tunnel", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5857 h2s->flags |= H2_SF_BLK_MBUSY;
5858 }
5859 else {
5860 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
5861 h2s_error(h2s, H2_ERR_CANCEL);
5862 }
5863 goto end;
5864 }
Willy Tarreau98de12a2018-12-12 07:03:00 +01005865
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005866 blk = htx_get_head_blk(htx);
5867 type = htx_get_blk_type(blk);
5868 bsize = htx_get_blksz(blk);
5869 fsize = bsize;
5870 trunc_out = 0;
5871 if (type != HTX_BLK_DATA)
5872 goto end;
5873
Willy Tarreau9c218e72019-05-26 10:08:28 +02005874 mbuf = br_tail(h2c->mbuf);
5875 retry:
5876 if (!h2_get_buf(h2c, mbuf)) {
5877 h2c->flags |= H2_CF_MUX_MALLOC;
5878 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005879 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 +02005880 goto end;
5881 }
5882
Willy Tarreau98de12a2018-12-12 07:03:00 +01005883 /* Perform some optimizations to reduce the number of buffer copies.
5884 * First, if the mux's buffer is empty and the htx area contains
5885 * exactly one data block of the same size as the requested count, and
5886 * this count fits within the frame size, the stream's window size, and
5887 * the connection's window size, then it's possible to simply swap the
5888 * caller's buffer with the mux's output buffer and adjust offsets and
5889 * length to match the entire DATA HTX block in the middle. In this
5890 * case we perform a true zero-copy operation from end-to-end. This is
5891 * the situation that happens all the time with large files. Second, if
5892 * this is not possible, but the mux's output buffer is empty, we still
5893 * have an opportunity to avoid the copy to the intermediary buffer, by
5894 * making the intermediary buffer's area point to the output buffer's
5895 * area. In this case we want to skip the HTX header to make sure that
5896 * copies remain aligned and that this operation remains possible all
5897 * the time. This goes for headers, data blocks and any data extracted
5898 * from the HTX blocks.
5899 */
5900 if (unlikely(fsize == count &&
Christopher Faulet192c6a22019-06-11 16:32:24 +02005901 htx_nbblks(htx) == 1 && type == HTX_BLK_DATA &&
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005902 fsize <= h2s_mws(h2s) && fsize <= h2c->mws && fsize <= h2c->mfs)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005903 void *old_area = mbuf->area;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005904
Willy Tarreaubcc45952019-05-26 10:05:50 +02005905 if (b_data(mbuf)) {
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005906 /* Too bad there are data left there. We're willing to memcpy/memmove
5907 * up to 1/4 of the buffer, which means that it's OK to copy a large
5908 * frame into a buffer containing few data if it needs to be realigned,
5909 * and that it's also OK to copy few data without realigning. Otherwise
5910 * we'll pretend the mbuf is full and wait for it to become empty.
Willy Tarreau98de12a2018-12-12 07:03:00 +01005911 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005912 if (fsize + 9 <= b_room(mbuf) &&
5913 (b_data(mbuf) <= b_size(mbuf) / 4 ||
Willy Tarreau7838a792019-08-12 18:42:03 +02005914 (fsize <= b_size(mbuf) / 4 && fsize + 9 <= b_contig_space(mbuf)))) {
5915 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 +01005916 goto copy;
Willy Tarreau7838a792019-08-12 18:42:03 +02005917 }
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005918
Willy Tarreau9c218e72019-05-26 10:08:28 +02005919 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5920 goto retry;
5921
Willy Tarreau98de12a2018-12-12 07:03:00 +01005922 h2c->flags |= H2_CF_MUX_MFULL;
5923 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005924 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 +01005925 goto end;
5926 }
5927
Christopher Faulet925abdf2021-04-27 22:51:07 +02005928 if (htx->flags & HTX_FL_EOM) {
5929 /* EOM+empty: we may need to add END_STREAM (except for tunneled
5930 * message)
5931 */
5932 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5933 es_now = 1;
5934 }
Willy Tarreau98de12a2018-12-12 07:03:00 +01005935 /* map an H2 frame to the HTX block so that we can put the
5936 * frame header there.
5937 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005938 *mbuf = b_make(buf->area, buf->size, sizeof(struct htx) + blk->addr - 9, fsize + 9);
5939 outbuf.area = b_head(mbuf);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005940
5941 /* prepend an H2 DATA frame header just before the DATA block */
5942 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5943 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
Christopher Faulet925abdf2021-04-27 22:51:07 +02005944 if (es_now)
5945 outbuf.area[4] |= H2_F_DATA_END_STREAM;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005946 h2_set_frame_size(outbuf.area, fsize);
5947
5948 /* update windows */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005949 h2s->sws -= fsize;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005950 h2c->mws -= fsize;
5951
5952 /* and exchange with our old area */
5953 buf->area = old_area;
5954 buf->data = buf->head = 0;
5955 total += fsize;
Christopher Faulet925abdf2021-04-27 22:51:07 +02005956 fsize = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005957
5958 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 +02005959 goto out;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005960 }
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005961
Willy Tarreau98de12a2018-12-12 07:03:00 +01005962 copy:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005963 /* for DATA and EOM we'll have to emit a frame, even if empty */
5964
5965 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005966 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5967 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005968 break;
5969 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005970 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005971 }
5972
5973 if (outbuf.size < 9) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02005974 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5975 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005976 h2c->flags |= H2_CF_MUX_MFULL;
5977 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005978 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005979 goto end;
5980 }
5981
5982 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
5983 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5984 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5985 outbuf.data = 9;
5986
5987 /* we have in <fsize> the exact number of bytes we need to copy from
5988 * the HTX buffer. We need to check this against the connection's and
5989 * the stream's send windows, and to ensure that this fits in the max
5990 * frame size and in the buffer's available space minus 9 bytes (for
5991 * the frame header). The connection's flow control is applied last so
5992 * that we can use a separate list of streams which are immediately
5993 * unblocked on window opening. Note: we don't implement padding.
5994 */
5995
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005996 if (!fsize)
5997 goto send_empty;
5998
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005999 if (h2s_mws(h2s) <= 0) {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006000 h2s->flags |= H2_SF_BLK_SFCTL;
Willy Tarreau2b718102021-04-21 07:32:39 +02006001 if (LIST_INLIST(&h2s->list))
Olivier Houchardbfe2a832019-05-10 14:02:21 +02006002 LIST_DEL_INIT(&h2s->list);
Willy Tarreau2b718102021-04-21 07:32:39 +02006003 LIST_APPEND(&h2c->blocked_list, &h2s->list);
Willy Tarreau7838a792019-08-12 18:42:03 +02006004 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 +01006005 goto end;
6006 }
6007
Willy Tarreauee573762018-12-04 15:25:57 +01006008 if (fsize > count)
6009 fsize = count;
6010
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02006011 if (fsize > h2s_mws(h2s))
6012 fsize = h2s_mws(h2s); // >0
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006013
6014 if (h2c->mfs && fsize > h2c->mfs)
6015 fsize = h2c->mfs; // >0
6016
6017 if (fsize + 9 > outbuf.size) {
Willy Tarreau455d5682019-05-24 19:42:18 +02006018 /* It doesn't fit at once. If it at least fits once split and
6019 * the amount of data to move is low, let's defragment the
6020 * buffer now.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006021 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02006022 if (b_space_wraps(mbuf) &&
6023 (fsize + 9 <= b_room(mbuf)) &&
6024 b_data(mbuf) <= MAX_DATA_REALIGN)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006025 goto realign_again;
6026 fsize = outbuf.size - 9;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01006027 trunc_out = 1;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006028
6029 if (fsize <= 0) {
6030 /* no need to send an empty frame here */
Willy Tarreau9c218e72019-05-26 10:08:28 +02006031 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
6032 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006033 h2c->flags |= H2_CF_MUX_MFULL;
6034 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02006035 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006036 goto end;
6037 }
6038 }
6039
6040 if (h2c->mws <= 0) {
6041 h2s->flags |= H2_SF_BLK_MFCTL;
Willy Tarreau7838a792019-08-12 18:42:03 +02006042 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 +01006043 goto end;
6044 }
6045
6046 if (fsize > h2c->mws)
6047 fsize = h2c->mws;
6048
6049 /* now let's copy this this into the output buffer */
6050 memcpy(outbuf.area + 9, htx_get_blk_ptr(htx, blk), fsize);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02006051 h2s->sws -= fsize;
Willy Tarreau0f799ca2018-12-04 15:20:11 +01006052 h2c->mws -= fsize;
Willy Tarreauee573762018-12-04 15:25:57 +01006053 count -= fsize;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006054
6055 send_empty:
6056 /* update the frame's size */
6057 h2_set_frame_size(outbuf.area, fsize);
6058
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006059 /* consume incoming HTX block */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006060 total += fsize;
6061 if (fsize == bsize) {
6062 htx_remove_blk(htx, blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006063 if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx)) {
6064 /* EOM+empty: we may need to add END_STREAM (except for tunneled
6065 * message)
6066 */
6067 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
6068 es_now = 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02006069 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006070 }
6071 else {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006072 /* we've truncated this block */
6073 htx_cut_data_blk(htx, blk, fsize);
6074 }
6075
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006076 if (es_now)
6077 outbuf.area[4] |= H2_F_DATA_END_STREAM;
6078
6079 /* commit the H2 response */
6080 b_add(mbuf, fsize + 9);
6081
Christopher Faulet925abdf2021-04-27 22:51:07 +02006082 out:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006083 if (es_now) {
6084 if (h2s->st == H2_SS_OPEN)
6085 h2s->st = H2_SS_HLOC;
6086 else
6087 h2s_close(h2s);
6088
6089 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02006090 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 +01006091 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006092 else if (fsize) {
6093 if (fsize == bsize) {
6094 TRACE_DEVEL("more data may be available, trying to send another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6095 goto new_frame;
6096 }
6097 else if (trunc_out) {
6098 /* we've truncated this block */
6099 goto new_frame;
6100 }
6101 }
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006102
6103 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02006104 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006105 return total;
6106}
6107
Christopher Faulet991febd2020-12-02 15:17:31 +01006108/* Skip the message payload (DATA blocks) and emit an empty DATA frame with the
6109 * ES flag set for stream <h2s>. This function is called for response known to
6110 * have no payload. Only DATA blocks are skipped. This means the trailers are
Ilya Shipitsinacf84592021-02-06 22:29:08 +05006111 * still emitted. The caller must check the stream's status to detect any error
Christopher Faulet991febd2020-12-02 15:17:31 +01006112 * which might have happened subsequently to a successful send. Returns the
6113 * number of data bytes consumed, or zero if nothing done.
6114 */
6115static size_t h2s_skip_data(struct h2s *h2s, struct buffer *buf, size_t count)
6116{
6117 struct h2c *h2c = h2s->h2c;
6118 struct htx *htx;
6119 int bsize; /* htx block size */
6120 int fsize; /* h2 frame size */
6121 struct htx_blk *blk;
6122 enum htx_blk_type type;
6123 size_t total = 0;
6124
6125 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6126
6127 if (h2c_mux_busy(h2c, h2s)) {
6128 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6129 h2s->flags |= H2_SF_BLK_MBUSY;
6130 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6131 goto end;
6132 }
6133
6134 htx = htx_from_buf(buf);
6135
6136 next_data:
6137 if (!count || htx_is_empty(htx))
6138 goto end;
6139 blk = htx_get_head_blk(htx);
6140 type = htx_get_blk_type(blk);
6141 bsize = htx_get_blksz(blk);
6142 fsize = bsize;
6143 if (type != HTX_BLK_DATA)
6144 goto end;
6145
6146 if (fsize > count)
6147 fsize = count;
6148
6149 if (fsize != bsize)
6150 goto skip_data;
6151
6152 if (!(htx->flags & HTX_FL_EOM) || !htx_is_unique_blk(htx, blk))
6153 goto skip_data;
6154
6155 /* Here, it is the last block and it is also the end of the message. So
6156 * we can emit an empty DATA frame with the ES flag set
6157 */
6158 if (h2_send_empty_data_es(h2s) <= 0)
6159 goto end;
6160
6161 if (h2s->st == H2_SS_OPEN)
6162 h2s->st = H2_SS_HLOC;
6163 else
6164 h2s_close(h2s);
6165
6166 skip_data:
6167 /* consume incoming HTX block */
6168 total += fsize;
6169 if (fsize == bsize) {
6170 TRACE_DEVEL("more data may be available, trying to skip another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6171 htx_remove_blk(htx, blk);
6172 goto next_data;
6173 }
6174 else {
6175 /* we've truncated this block */
6176 htx_cut_data_blk(htx, blk, fsize);
6177 }
6178
6179 end:
6180 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6181 return total;
6182}
6183
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006184/* Try to send a HEADERS frame matching HTX_BLK_TLR series of blocks present in
6185 * HTX message <htx> for the H2 stream <h2s>. Returns the number of bytes
6186 * processed. The caller must check the stream's status to detect any error
6187 * which might have happened subsequently to a successful send. The htx blocks
6188 * are automatically removed from the message. The htx message is assumed to be
6189 * valid since produced from the internal code. Processing stops when meeting
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006190 * the EOT, which *is* removed. All trailers are processed at once and sent as a
6191 * single frame. The ES flag is always set.
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006192 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006193static size_t h2s_make_trailers(struct h2s *h2s, struct htx *htx)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006194{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02006195 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006196 struct h2c *h2c = h2s->h2c;
6197 struct htx_blk *blk;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006198 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02006199 struct buffer *mbuf;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006200 enum htx_blk_type type;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006201 int ret = 0;
6202 int hdr;
6203 int idx;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006204
Willy Tarreau7838a792019-08-12 18:42:03 +02006205 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
6206
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006207 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006208 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006209 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02006210 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006211 goto end;
6212 }
6213
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006214 /* get trailers. */
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006215 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006216 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006217 type = htx_get_blk_type(blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006218
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006219 if (type == HTX_BLK_UNUSED)
6220 continue;
6221
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006222 if (type == HTX_BLK_EOT)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006223 break;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006224 if (type == HTX_BLK_TLR) {
6225 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
6226 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
6227 goto fail;
6228 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006229
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006230 list[hdr].n = htx_get_blk_name(htx, blk);
6231 list[hdr].v = htx_get_blk_value(htx, blk);
6232 hdr++;
6233 }
6234 else {
6235 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 +01006236 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02006237 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006238 }
6239
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006240 /* marker for end of trailers */
6241 list[hdr].n = ist("");
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006242
Willy Tarreau9c218e72019-05-26 10:08:28 +02006243 mbuf = br_tail(h2c->mbuf);
6244 retry:
6245 if (!h2_get_buf(h2c, mbuf)) {
6246 h2c->flags |= H2_CF_MUX_MALLOC;
6247 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02006248 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 +02006249 goto end;
6250 }
6251
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006252 chunk_reset(&outbuf);
6253
6254 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02006255 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
6256 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006257 break;
6258 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02006259 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006260 }
6261
6262 if (outbuf.size < 9)
6263 goto full;
6264
6265 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4,ES=1 */
6266 memcpy(outbuf.area, "\x00\x00\x00\x01\x05", 5);
6267 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
6268 outbuf.data = 9;
6269
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006270 /* encode all headers */
6271 for (idx = 0; idx < hdr; idx++) {
6272 /* these ones do not exist in H2 or must not appear in
6273 * trailers and must be dropped.
6274 */
6275 if (isteq(list[idx].n, ist("host")) ||
6276 isteq(list[idx].n, ist("content-length")) ||
6277 isteq(list[idx].n, ist("connection")) ||
6278 isteq(list[idx].n, ist("proxy-connection")) ||
6279 isteq(list[idx].n, ist("keep-alive")) ||
6280 isteq(list[idx].n, ist("upgrade")) ||
6281 isteq(list[idx].n, ist("te")) ||
6282 isteq(list[idx].n, ist("transfer-encoding")))
6283 continue;
6284
Christopher Faulet86d144c2019-08-14 16:32:25 +02006285 /* Skip all pseudo-headers */
6286 if (*(list[idx].n.ptr) == ':')
6287 continue;
6288
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006289 if (!hpack_encode_header(&outbuf, list[idx].n, list[idx].v)) {
6290 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02006291 if (b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006292 goto realign_again;
6293 goto full;
6294 }
6295 }
6296
Willy Tarreau5121e5d2019-05-06 15:13:41 +02006297 if (outbuf.data == 9) {
6298 /* here we have a problem, we have nothing to emit (either we
6299 * received an empty trailers block followed or we removed its
6300 * contents above). Because of this we can't send a HEADERS
6301 * frame, so we have to cheat and instead send an empty DATA
6302 * frame conveying the ES flag.
Willy Tarreau67b8cae2019-02-21 18:16:35 +01006303 */
6304 outbuf.area[3] = H2_FT_DATA;
6305 outbuf.area[4] = H2_F_DATA_END_STREAM;
6306 }
6307
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006308 /* update the frame's size */
6309 h2_set_frame_size(outbuf.area, outbuf.data - 9);
6310
Willy Tarreau572d9f52019-10-11 16:58:37 +02006311 if (outbuf.data > h2c->mfs + 9) {
6312 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
6313 /* output full */
6314 if (b_space_wraps(mbuf))
6315 goto realign_again;
6316 goto full;
6317 }
6318 }
6319
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006320 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02006321 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 +02006322 b_add(mbuf, outbuf.data);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006323 h2s->flags |= H2_SF_ES_SENT;
6324
6325 if (h2s->st == H2_SS_OPEN)
6326 h2s->st = H2_SS_HLOC;
6327 else
6328 h2s_close(h2s);
6329
6330 /* OK we could properly deliver the response */
6331 done:
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02006332 /* remove all header blocks till the end and compute the corresponding size. */
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006333 ret = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006334 blk = htx_get_head_blk(htx);
6335 while (blk) {
6336 type = htx_get_blk_type(blk);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006337 ret += htx_get_blksz(blk);
6338 blk = htx_remove_blk(htx, blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006339 /* The removed block is the EOT */
6340 if (type == HTX_BLK_EOT)
6341 break;
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006342 }
6343
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006344 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02006345 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006346 return ret;
6347 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02006348 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
6349 goto retry;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006350 h2c->flags |= H2_CF_MUX_MFULL;
6351 h2s->flags |= H2_SF_BLK_MROOM;
6352 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006353 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 +01006354 goto end;
6355 fail:
6356 /* unparsable HTX messages, too large ones to be produced in the local
6357 * list etc go here (unrecoverable errors).
6358 */
6359 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
6360 ret = 0;
6361 goto end;
6362}
6363
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006364/* Called from the upper layer, to subscribe <es> to events <event_type>. The
6365 * event subscriber <es> is not allowed to change from a previous call as long
6366 * as at least one event is still subscribed. The <event_type> must only be a
6367 * combination of SUB_RETRY_RECV and SUB_RETRY_SEND. It always returns 0.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006368 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006369static int h2_subscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard6ff20392018-07-17 18:46:31 +02006370{
Olivier Houchard6ff20392018-07-17 18:46:31 +02006371 struct h2s *h2s = cs->ctx;
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02006372 struct h2c *h2c = h2s->h2c;
Olivier Houchard6ff20392018-07-17 18:46:31 +02006373
Willy Tarreau7838a792019-08-12 18:42:03 +02006374 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006375
6376 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006377 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006378
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006379 es->events |= event_type;
6380 h2s->subs = es;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006381
6382 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006383 TRACE_DEVEL("subscribe(recv)", H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006384
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006385 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006386 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2c->conn, h2s);
Olivier Houchardf8338152019-05-14 17:50:32 +02006387 if (!(h2s->flags & H2_SF_BLK_SFCTL) &&
Willy Tarreau2b718102021-04-21 07:32:39 +02006388 !LIST_INLIST(&h2s->list)) {
Olivier Houchardf8338152019-05-14 17:50:32 +02006389 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02006390 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Olivier Houchardf8338152019-05-14 17:50:32 +02006391 else
Willy Tarreau2b718102021-04-21 07:32:39 +02006392 LIST_APPEND(&h2c->send_list, &h2s->list);
Olivier Houcharde1c6dbc2018-08-01 17:06:43 +02006393 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02006394 }
Willy Tarreau7838a792019-08-12 18:42:03 +02006395 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006396 return 0;
Olivier Houchard6ff20392018-07-17 18:46:31 +02006397}
6398
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006399/* Called from the upper layer, to unsubscribe <es> from events <event_type>.
6400 * The <es> pointer is not allowed to differ from the one passed to the
6401 * subscribe() call. It always returns zero.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006402 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006403static int h2_unsubscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006404{
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006405 struct h2s *h2s = cs->ctx;
6406
Willy Tarreau7838a792019-08-12 18:42:03 +02006407 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006408
6409 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006410 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006411
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006412 es->events &= ~event_type;
6413 if (!es->events)
Willy Tarreauf96508a2020-01-10 11:12:48 +01006414 h2s->subs = NULL;
6415
6416 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006417 TRACE_DEVEL("unsubscribe(recv)", H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006418
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006419 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006420 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006421 h2s->flags &= ~H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006422 if (!(h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)))
6423 LIST_DEL_INIT(&h2s->list);
Olivier Houchardd846c262018-10-19 17:24:29 +02006424 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01006425
Willy Tarreau7838a792019-08-12 18:42:03 +02006426 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006427 return 0;
6428}
6429
6430
Christopher Faulet93a466b2021-09-21 15:50:55 +02006431/* Called from the upper layer, to receive data
6432 *
6433 * The caller is responsible for defragmenting <buf> if necessary. But <flags>
6434 * must be tested to know the calling context. If CO_RFL_BUF_FLUSH is set, it
6435 * means the caller wants to flush input data (from the mux buffer and the
6436 * channel buffer) to be able to use kernel splicing or any kind of mux-to-mux
6437 * xfer. If CO_RFL_KEEP_RECV is set, the mux must always subscribe for read
6438 * events before giving back. CO_RFL_BUF_WET is set if <buf> is congested with
6439 * data scheduled for leaving soon. CO_RFL_BUF_NOT_STUCK is set to instruct the
6440 * mux it may optimize the data copy to <buf> if necessary. Otherwise, it should
6441 * copy as much data as possible.
6442 */
Olivier Houchard511efea2018-08-16 15:30:32 +02006443static size_t h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
6444{
Olivier Houchard638b7992018-08-16 15:41:52 +02006445 struct h2s *h2s = cs->ctx;
Willy Tarreau082f5592018-11-25 08:03:32 +01006446 struct h2c *h2c = h2s->h2c;
Willy Tarreau86724e22018-12-01 23:19:43 +01006447 struct htx *h2s_htx = NULL;
6448 struct htx *buf_htx = NULL;
Olivier Houchard511efea2018-08-16 15:30:32 +02006449 size_t ret = 0;
6450
Willy Tarreau7838a792019-08-12 18:42:03 +02006451 TRACE_ENTER(H2_EV_STRM_RECV, h2c->conn, h2s);
6452
Olivier Houchard511efea2018-08-16 15:30:32 +02006453 /* transfer possibly pending data to the upper layer */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006454 h2s_htx = htx_from_buf(&h2s->rxbuf);
Christopher Faulet83f3d3d2022-02-21 15:12:54 +01006455 if (htx_is_empty(h2s_htx) && !(h2s_htx->flags & HTX_FL_PARSING_ERROR)) {
Christopher Faulet9b79a102019-07-15 11:22:56 +02006456 /* Here htx_to_buf() will set buffer data to 0 because
6457 * the HTX is empty.
6458 */
6459 htx_to_buf(h2s_htx, &h2s->rxbuf);
6460 goto end;
6461 }
Willy Tarreau7196dd62019-03-05 10:51:11 +01006462
Christopher Faulet9b79a102019-07-15 11:22:56 +02006463 ret = h2s_htx->data;
6464 buf_htx = htx_from_buf(buf);
Willy Tarreau7196dd62019-03-05 10:51:11 +01006465
Christopher Faulet9b79a102019-07-15 11:22:56 +02006466 /* <buf> is empty and the message is small enough, swap the
6467 * buffers. */
6468 if (htx_is_empty(buf_htx) && htx_used_space(h2s_htx) <= count) {
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01006469 htx_to_buf(buf_htx, buf);
6470 htx_to_buf(h2s_htx, &h2s->rxbuf);
Christopher Faulet9b79a102019-07-15 11:22:56 +02006471 b_xfer(buf, &h2s->rxbuf, b_data(&h2s->rxbuf));
6472 goto end;
Willy Tarreau86724e22018-12-01 23:19:43 +01006473 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02006474
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006475 htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_UNUSED);
Christopher Faulet9b79a102019-07-15 11:22:56 +02006476
6477 if (h2s_htx->flags & HTX_FL_PARSING_ERROR) {
6478 buf_htx->flags |= HTX_FL_PARSING_ERROR;
6479 if (htx_is_empty(buf_htx))
6480 cs->flags |= CS_FL_EOI;
Willy Tarreau86724e22018-12-01 23:19:43 +01006481 }
Christopher Faulet810df062020-07-22 16:20:34 +02006482 else if (htx_is_empty(h2s_htx))
Christopher Faulet42432f32020-11-20 17:43:16 +01006483 buf_htx->flags |= (h2s_htx->flags & HTX_FL_EOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02006484
Christopher Faulet9b79a102019-07-15 11:22:56 +02006485 buf_htx->extra = (h2s_htx->extra ? (h2s_htx->data + h2s_htx->extra) : 0);
6486 htx_to_buf(buf_htx, buf);
6487 htx_to_buf(h2s_htx, &h2s->rxbuf);
6488 ret -= h2s_htx->data;
6489
Christopher Faulet37070b22019-02-14 15:12:14 +01006490 end:
Olivier Houchard638b7992018-08-16 15:41:52 +02006491 if (b_data(&h2s->rxbuf))
Olivier Houchardd247be02018-12-06 16:22:29 +01006492 cs->flags |= (CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02006493 else {
Olivier Houchardd247be02018-12-06 16:22:29 +01006494 cs->flags &= ~(CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Christopher Fauletd0db4232021-01-22 11:46:30 +01006495 if (h2s->flags & H2_SF_ES_RCVD) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02006496 cs->flags |= CS_FL_EOI;
Christopher Fauletd0db4232021-01-22 11:46:30 +01006497 /* Add EOS flag for tunnel */
6498 if (h2s->flags & H2_SF_BODY_TUNNEL)
6499 cs->flags |= CS_FL_EOS;
6500 }
Christopher Fauletaade4ed2020-10-08 15:38:41 +02006501 if (h2c_read0_pending(h2c) || h2s->st == H2_SS_CLOSED)
Olivier Houchard511efea2018-08-16 15:30:32 +02006502 cs->flags |= CS_FL_EOS;
Olivier Houchard71748cb2018-12-17 14:16:46 +01006503 if (cs->flags & CS_FL_ERR_PENDING)
6504 cs->flags |= CS_FL_ERROR;
Olivier Houchard638b7992018-08-16 15:41:52 +02006505 if (b_size(&h2s->rxbuf)) {
6506 b_free(&h2s->rxbuf);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01006507 offer_buffers(NULL, 1);
Olivier Houchard638b7992018-08-16 15:41:52 +02006508 }
Olivier Houchard511efea2018-08-16 15:30:32 +02006509 }
6510
Willy Tarreau082f5592018-11-25 08:03:32 +01006511 if (ret && h2c->dsi == h2s->id) {
6512 /* demux is blocking on this stream's buffer */
6513 h2c->flags &= ~H2_CF_DEM_SFULL;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02006514 h2c_restart_reading(h2c, 1);
Willy Tarreau082f5592018-11-25 08:03:32 +01006515 }
Christopher Faulet37070b22019-02-14 15:12:14 +01006516
Willy Tarreau7838a792019-08-12 18:42:03 +02006517 TRACE_LEAVE(H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard511efea2018-08-16 15:30:32 +02006518 return ret;
6519}
6520
Olivier Houchardd846c262018-10-19 17:24:29 +02006521
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006522/* Called from the upper layer, to send data from buffer <buf> for no more than
6523 * <count> bytes. Returns the number of bytes effectively sent. Some status
6524 * flags may be updated on the conn_stream.
6525 */
Christopher Fauletd44a9b32018-07-27 11:59:41 +02006526static size_t h2_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
Willy Tarreau62f52692017-10-08 23:01:42 +02006527{
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006528 struct h2s *h2s = cs->ctx;
Willy Tarreau1dc41e72018-06-14 13:21:28 +02006529 size_t total = 0;
Willy Tarreau5dd17352018-06-14 13:33:30 +02006530 size_t ret;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006531 struct htx *htx;
6532 struct htx_blk *blk;
6533 enum htx_blk_type btype;
6534 uint32_t bsize;
6535 int32_t idx;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006536
Willy Tarreau7838a792019-08-12 18:42:03 +02006537 TRACE_ENTER(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
6538
Olivier Houchardd360ac62019-03-22 17:37:16 +01006539 /* If we were not just woken because we wanted to send but couldn't,
6540 * and there's somebody else that is waiting to send, do nothing,
6541 * we will subscribe later and be put at the end of the list
6542 */
Willy Tarreaud9464162020-01-10 18:25:07 +01006543 if (!(h2s->flags & H2_SF_NOTIFIED) &&
Willy Tarreau7838a792019-08-12 18:42:03 +02006544 (!LIST_ISEMPTY(&h2s->h2c->send_list) || !LIST_ISEMPTY(&h2s->h2c->fctl_list))) {
6545 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 +01006546 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006547 }
Willy Tarreaud9464162020-01-10 18:25:07 +01006548 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02006549
Willy Tarreau7838a792019-08-12 18:42:03 +02006550 if (h2s->h2c->st0 < H2_CS_FRAME_H) {
6551 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 +02006552 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006553 }
Willy Tarreau6bf641a2018-10-08 09:43:03 +02006554
Willy Tarreaucab22952019-10-31 15:48:18 +01006555 if (h2s->h2c->st0 >= H2_CS_ERROR) {
6556 cs->flags |= CS_FL_ERROR;
6557 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);
6558 return 0;
6559 }
6560
Christopher Faulet9b79a102019-07-15 11:22:56 +02006561 htx = htx_from_buf(buf);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006562
Willy Tarreau0bad0432018-06-14 16:54:01 +02006563 if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count)
Willy Tarreauc4312d32017-11-07 12:01:53 +01006564 h2s->flags |= H2_SF_OUTGOING_DATA;
6565
Willy Tarreau751f2d02018-10-05 09:35:00 +02006566 if (h2s->id == 0) {
6567 int32_t id = h2c_get_next_sid(h2s->h2c);
6568
6569 if (id < 0) {
Willy Tarreau751f2d02018-10-05 09:35:00 +02006570 cs->flags |= CS_FL_ERROR;
Willy Tarreau7838a792019-08-12 18:42:03 +02006571 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 +02006572 return 0;
6573 }
6574
6575 eb32_delete(&h2s->by_id);
6576 h2s->by_id.key = h2s->id = id;
6577 h2s->h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01006578 h2s->h2c->nb_reserved--;
Willy Tarreau751f2d02018-10-05 09:35:00 +02006579 eb32_insert(&h2s->h2c->streams_by_id, &h2s->by_id);
6580 }
6581
Christopher Faulet9b79a102019-07-15 11:22:56 +02006582 while (h2s->st < H2_SS_HLOC && !(h2s->flags & H2_SF_BLK_ANY) &&
6583 count && !htx_is_empty(htx)) {
6584 idx = htx_get_head(htx);
6585 blk = htx_get_blk(htx, idx);
6586 btype = htx_get_blk_type(blk);
6587 bsize = htx_get_blksz(blk);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006588
Christopher Faulet9b79a102019-07-15 11:22:56 +02006589 switch (btype) {
Willy Tarreau80739692018-10-05 11:35:57 +02006590 case HTX_BLK_REQ_SL:
6591 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006592 ret = h2s_bck_make_req_headers(h2s, htx);
Willy Tarreau80739692018-10-05 11:35:57 +02006593 if (ret > 0) {
6594 total += ret;
6595 count -= ret;
6596 if (ret < bsize)
6597 goto done;
6598 }
6599 break;
6600
Willy Tarreau115e83b2018-12-01 19:17:53 +01006601 case HTX_BLK_RES_SL:
6602 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006603 ret = h2s_frt_make_resp_headers(h2s, htx);
Willy Tarreau115e83b2018-12-01 19:17:53 +01006604 if (ret > 0) {
6605 total += ret;
6606 count -= ret;
6607 if (ret < bsize)
6608 goto done;
6609 }
6610 break;
6611
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006612 case HTX_BLK_DATA:
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006613 /* all these cause the emission of a DATA frame (possibly empty) */
Christopher Faulet991febd2020-12-02 15:17:31 +01006614 if (!(h2s->h2c->flags & H2_CF_IS_BACK) &&
6615 (h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_BODYLESS_RESP)) == H2_SF_BODYLESS_RESP)
6616 ret = h2s_skip_data(h2s, buf, count);
6617 else
6618 ret = h2s_make_data(h2s, buf, count);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006619 if (ret > 0) {
Willy Tarreau98de12a2018-12-12 07:03:00 +01006620 htx = htx_from_buf(buf);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006621 total += ret;
6622 count -= ret;
6623 if (ret < bsize)
6624 goto done;
6625 }
6626 break;
6627
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006628 case HTX_BLK_TLR:
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006629 case HTX_BLK_EOT:
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006630 /* This is the first trailers block, all the subsequent ones */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006631 ret = h2s_make_trailers(h2s, htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006632 if (ret > 0) {
6633 total += ret;
6634 count -= ret;
6635 if (ret < bsize)
6636 goto done;
6637 }
6638 break;
6639
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006640 default:
6641 htx_remove_blk(htx, blk);
6642 total += bsize;
6643 count -= bsize;
6644 break;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006645 }
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006646 }
6647
Christopher Faulet9b79a102019-07-15 11:22:56 +02006648 done:
Willy Tarreau2b778482019-05-06 15:00:22 +02006649 if (h2s->st >= H2_SS_HLOC) {
Willy Tarreau00610962018-07-19 10:58:28 +02006650 /* trim any possibly pending data after we close (extra CR-LF,
6651 * unprocessed trailers, abnormal extra data, ...)
6652 */
Willy Tarreau0bad0432018-06-14 16:54:01 +02006653 total += count;
6654 count = 0;
Willy Tarreau00610962018-07-19 10:58:28 +02006655 }
6656
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006657 /* RST are sent similarly to frame acks */
Willy Tarreau02492192017-12-07 15:59:29 +01006658 if (h2s->st == H2_SS_ERROR || h2s->flags & H2_SF_RST_RCVD) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006659 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 +01006660 cs_set_error(cs);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01006661 if (h2s_send_rst_stream(h2s->h2c, h2s) > 0)
Willy Tarreau00dd0782018-03-01 16:31:34 +01006662 h2s_close(h2s);
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006663 }
6664
Christopher Faulet9b79a102019-07-15 11:22:56 +02006665 htx_to_buf(htx, buf);
Olivier Houchardd846c262018-10-19 17:24:29 +02006666
Olivier Houchard7505f942018-08-21 18:10:44 +02006667 if (total > 0) {
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006668 if (!(h2s->h2c->wait_event.events & SUB_RETRY_SEND)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006669 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 +02006670 tasklet_wakeup(h2s->h2c->wait_event.tasklet);
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006671 }
Olivier Houchardd846c262018-10-19 17:24:29 +02006672
Olivier Houchard7505f942018-08-21 18:10:44 +02006673 }
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01006674 /* If we're waiting for flow control, and we got a shutr on the
6675 * connection, we will never be unlocked, so add an error on
6676 * the conn_stream.
6677 */
6678 if (conn_xprt_read0_pending(h2s->h2c->conn) &&
6679 !b_data(&h2s->h2c->dbuf) &&
6680 (h2s->flags & (H2_SF_BLK_SFCTL | H2_SF_BLK_MFCTL))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006681 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 +01006682 if (cs->flags & CS_FL_EOS)
6683 cs->flags |= CS_FL_ERROR;
6684 else
6685 cs->flags |= CS_FL_ERR_PENDING;
6686 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006687
Willy Tarreau5723f292020-01-10 15:16:57 +01006688 if (total > 0 && !(h2s->flags & H2_SF_BLK_SFCTL) &&
6689 !(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006690 /* Ok we managed to send something, leave the send_list if we were still there */
Olivier Houchardd360ac62019-03-22 17:37:16 +01006691 LIST_DEL_INIT(&h2s->list);
6692 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006693
Willy Tarreau7838a792019-08-12 18:42:03 +02006694 TRACE_LEAVE(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006695 return total;
Willy Tarreau62f52692017-10-08 23:01:42 +02006696}
6697
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006698/* for debugging with CLI's "show fd" command */
Willy Tarreau8050efe2021-01-21 08:26:06 +01006699static int h2_show_fd(struct buffer *msg, struct connection *conn)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006700{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01006701 struct h2c *h2c = conn->ctx;
Willy Tarreau987c0632018-12-18 10:32:05 +01006702 struct h2s *h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006703 struct eb32_node *node;
6704 int fctl_cnt = 0;
6705 int send_cnt = 0;
6706 int tree_cnt = 0;
6707 int orph_cnt = 0;
Willy Tarreau60f62682019-05-26 11:32:27 +02006708 struct buffer *hmbuf, *tmbuf;
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006709 int ret = 0;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006710
6711 if (!h2c)
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006712 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006713
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006714 list_for_each_entry(h2s, &h2c->fctl_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006715 fctl_cnt++;
6716
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006717 list_for_each_entry(h2s, &h2c->send_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006718 send_cnt++;
6719
Willy Tarreau3af37712018-12-18 14:34:41 +01006720 h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006721 node = eb32_first(&h2c->streams_by_id);
6722 while (node) {
6723 h2s = container_of(node, struct h2s, by_id);
6724 tree_cnt++;
6725 if (!h2s->cs)
6726 orph_cnt++;
6727 node = eb32_next(node);
6728 }
6729
Willy Tarreau60f62682019-05-26 11:32:27 +02006730 hmbuf = br_head(h2c->mbuf);
Willy Tarreaubcc45952019-05-26 10:05:50 +02006731 tmbuf = br_tail(h2c->mbuf);
Willy Tarreauab2ec452019-08-30 07:07:08 +02006732 chunk_appendf(msg, " h2c.st0=%s .err=%d .maxid=%d .lastid=%d .flg=0x%04x"
Willy Tarreau987c0632018-12-18 10:32:05 +01006733 " .nbst=%u .nbcs=%u .fctl_cnt=%d .send_cnt=%d .tree_cnt=%d"
Willy Tarreau60f62682019-05-26 11:32:27 +02006734 " .orph_cnt=%d .sub=%d .dsi=%d .dbuf=%u@%p+%u/%u .msi=%d"
6735 " .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]",
Willy Tarreauab2ec452019-08-30 07:07:08 +02006736 h2c_st_to_str(h2c->st0), h2c->errcode, h2c->max_id, h2c->last_sid, h2c->flags,
Willy Tarreau616ac812018-07-24 14:12:42 +02006737 h2c->nb_streams, h2c->nb_cs, fctl_cnt, send_cnt, tree_cnt, orph_cnt,
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006738 h2c->wait_event.events, h2c->dsi,
Willy Tarreau987c0632018-12-18 10:32:05 +01006739 (unsigned int)b_data(&h2c->dbuf), b_orig(&h2c->dbuf),
6740 (unsigned int)b_head_ofs(&h2c->dbuf), (unsigned int)b_size(&h2c->dbuf),
6741 h2c->msi,
Willy Tarreau60f62682019-05-26 11:32:27 +02006742 br_head_idx(h2c->mbuf), br_tail_idx(h2c->mbuf), br_size(h2c->mbuf),
6743 (unsigned int)b_data(hmbuf), b_orig(hmbuf),
6744 (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf),
Willy Tarreaubcc45952019-05-26 10:05:50 +02006745 (unsigned int)b_data(tmbuf), b_orig(tmbuf),
6746 (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf));
Willy Tarreau987c0632018-12-18 10:32:05 +01006747
6748 if (h2s) {
Willy Tarreaued4464e2021-01-20 15:50:03 +01006749 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 +02006750 h2s, h2s->id, h2s_st_to_str(h2s->st), h2s->flags,
Willy Tarreau987c0632018-12-18 10:32:05 +01006751 (unsigned int)b_data(&h2s->rxbuf), b_orig(&h2s->rxbuf),
6752 (unsigned int)b_head_ofs(&h2s->rxbuf), (unsigned int)b_size(&h2s->rxbuf),
6753 h2s->cs);
6754 if (h2s->cs)
Willy Tarreau98e40b92021-01-20 16:27:01 +01006755 chunk_appendf(msg, "(.flg=0x%08x .data=%p)",
Willy Tarreau987c0632018-12-18 10:32:05 +01006756 h2s->cs->flags, h2s->cs->data);
Willy Tarreau98e40b92021-01-20 16:27:01 +01006757
Willy Tarreaue972a432022-09-01 18:02:15 +02006758 chunk_appendf(msg, " .subs=%p", h2s->subs);
Willy Tarreau98e40b92021-01-20 16:27:01 +01006759 if (h2s->subs) {
Willy Tarreaue972a432022-09-01 18:02:15 +02006760 chunk_appendf(msg, "(ev=%d tl=%p", h2s->subs->events, h2s->subs->tasklet);
6761 chunk_appendf(msg, " tl.calls=%d tl.ctx=%p tl.fct=",
Christopher Faulet6c93c4e2021-02-25 10:06:29 +01006762 h2s->subs->tasklet->calls,
6763 h2s->subs->tasklet->context);
6764 if (h2s->subs->tasklet->calls >= 1000000)
6765 ret = 1;
Willy Tarreaue972a432022-09-01 18:02:15 +02006766 resolve_sym_name(msg, NULL, h2s->subs->tasklet->process);
6767 chunk_appendf(msg, ")");
Willy Tarreau98e40b92021-01-20 16:27:01 +01006768 }
Willy Tarreau987c0632018-12-18 10:32:05 +01006769 }
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006770 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006771}
Willy Tarreau62f52692017-10-08 23:01:42 +02006772
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006773/* Migrate the the connection to the current thread.
6774 * Return 0 if successful, non-zero otherwise.
6775 * Expected to be called with the old thread lock held.
6776 */
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006777static int h2_takeover(struct connection *conn, int orig_tid)
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006778{
6779 struct h2c *h2c = conn->ctx;
Willy Tarreau617e80f2020-07-01 16:39:33 +02006780 struct task *task;
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006781
6782 if (fd_takeover(conn->handle.fd, conn) != 0)
6783 return -1;
Olivier Houcharda74bb7e2020-07-03 14:01:21 +02006784
6785 if (conn->xprt->takeover && conn->xprt->takeover(conn, conn->xprt_ctx, orig_tid) != 0) {
6786 /* We failed to takeover the xprt, even if the connection may
6787 * still be valid, flag it as error'd, as we have already
6788 * taken over the fd, and wake the tasklet, so that it will
6789 * destroy it.
6790 */
6791 conn->flags |= CO_FL_ERROR;
6792 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
6793 return -1;
6794 }
6795
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006796 if (h2c->wait_event.events)
6797 h2c->conn->xprt->unsubscribe(h2c->conn, h2c->conn->xprt_ctx,
6798 h2c->wait_event.events, &h2c->wait_event);
6799 /* To let the tasklet know it should free itself, and do nothing else,
6800 * set its context to NULL.
6801 */
6802 h2c->wait_event.tasklet->context = NULL;
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006803 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
Willy Tarreau617e80f2020-07-01 16:39:33 +02006804
6805 task = h2c->task;
6806 if (task) {
6807 task->context = NULL;
6808 h2c->task = NULL;
6809 __ha_barrier_store();
6810 task_kill(task);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006811
6812 h2c->task = task_new(tid_bit);
6813 if (!h2c->task) {
6814 h2_release(h2c);
6815 return -1;
6816 }
6817 h2c->task->process = h2_timeout_task;
6818 h2c->task->context = h2c;
6819 }
6820 h2c->wait_event.tasklet = tasklet_new();
6821 if (!h2c->wait_event.tasklet) {
6822 h2_release(h2c);
6823 return -1;
6824 }
6825 h2c->wait_event.tasklet->process = h2_io_cb;
6826 h2c->wait_event.tasklet->context = h2c;
6827 h2c->conn->xprt->subscribe(h2c->conn, h2c->conn->xprt_ctx,
6828 SUB_RETRY_RECV, &h2c->wait_event);
6829
6830 return 0;
6831}
6832
Willy Tarreau62f52692017-10-08 23:01:42 +02006833/*******************************************************/
6834/* functions below are dedicated to the config parsers */
6835/*******************************************************/
6836
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006837/* config parser for global "tune.h2.header-table-size" */
6838static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006839 const struct proxy *defpx, const char *file, int line,
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006840 char **err)
6841{
6842 if (too_many_args(1, args, err, NULL))
6843 return -1;
6844
6845 h2_settings_header_table_size = atoi(args[1]);
6846 if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) {
6847 memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]);
6848 return -1;
6849 }
6850 return 0;
6851}
Willy Tarreau62f52692017-10-08 23:01:42 +02006852
Willy Tarreaue6baec02017-07-27 11:45:11 +02006853/* config parser for global "tune.h2.initial-window-size" */
6854static int h2_parse_initial_window_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006855 const struct proxy *defpx, const char *file, int line,
Willy Tarreaue6baec02017-07-27 11:45:11 +02006856 char **err)
6857{
6858 if (too_many_args(1, args, err, NULL))
6859 return -1;
6860
6861 h2_settings_initial_window_size = atoi(args[1]);
6862 if (h2_settings_initial_window_size < 0) {
6863 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6864 return -1;
6865 }
6866 return 0;
6867}
6868
Willy Tarreau5242ef82017-07-27 11:47:28 +02006869/* config parser for global "tune.h2.max-concurrent-streams" */
6870static int h2_parse_max_concurrent_streams(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006871 const struct proxy *defpx, const char *file, int line,
Willy Tarreau5242ef82017-07-27 11:47:28 +02006872 char **err)
6873{
6874 if (too_many_args(1, args, err, NULL))
6875 return -1;
6876
6877 h2_settings_max_concurrent_streams = atoi(args[1]);
Willy Tarreau5a490b62019-01-31 10:39:51 +01006878 if ((int)h2_settings_max_concurrent_streams < 0) {
Willy Tarreau5242ef82017-07-27 11:47:28 +02006879 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6880 return -1;
6881 }
6882 return 0;
6883}
6884
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006885/* config parser for global "tune.h2.max-frame-size" */
6886static int h2_parse_max_frame_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006887 const struct proxy *defpx, const char *file, int line,
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006888 char **err)
6889{
6890 if (too_many_args(1, args, err, NULL))
6891 return -1;
6892
6893 h2_settings_max_frame_size = atoi(args[1]);
6894 if (h2_settings_max_frame_size < 16384 || h2_settings_max_frame_size > 16777215) {
6895 memprintf(err, "'%s' expects a numeric value between 16384 and 16777215.", args[0]);
6896 return -1;
6897 }
6898 return 0;
6899}
6900
Willy Tarreau62f52692017-10-08 23:01:42 +02006901
6902/****************************************/
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05006903/* MUX initialization and instantiation */
Willy Tarreau62f52692017-10-08 23:01:42 +02006904/***************************************/
6905
6906/* The mux operations */
Willy Tarreau680b2bd2018-11-27 07:30:17 +01006907static const struct mux_ops h2_ops = {
Willy Tarreau62f52692017-10-08 23:01:42 +02006908 .init = h2_init,
Olivier Houchard21df6cc2018-09-14 23:21:44 +02006909 .wake = h2_wake,
Willy Tarreau62f52692017-10-08 23:01:42 +02006910 .snd_buf = h2_snd_buf,
Olivier Houchard511efea2018-08-16 15:30:32 +02006911 .rcv_buf = h2_rcv_buf,
Olivier Houchard6ff20392018-07-17 18:46:31 +02006912 .subscribe = h2_subscribe,
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006913 .unsubscribe = h2_unsubscribe,
Willy Tarreau62f52692017-10-08 23:01:42 +02006914 .attach = h2_attach,
Willy Tarreaufafd3982018-11-18 21:29:20 +01006915 .get_first_cs = h2_get_first_cs,
Willy Tarreau62f52692017-10-08 23:01:42 +02006916 .detach = h2_detach,
Olivier Houchard060ed432018-11-06 16:32:42 +01006917 .destroy = h2_destroy,
Olivier Houchardd540b362018-11-05 18:37:53 +01006918 .avail_streams = h2_avail_streams,
Willy Tarreau00f18a32019-01-26 12:19:01 +01006919 .used_streams = h2_used_streams,
Willy Tarreau62f52692017-10-08 23:01:42 +02006920 .shutr = h2_shutr,
6921 .shutw = h2_shutw,
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02006922 .ctl = h2_ctl,
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006923 .show_fd = h2_show_fd,
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006924 .takeover = h2_takeover,
Christopher Fauleta4600572021-03-08 15:28:28 +01006925 .flags = MX_FL_CLEAN_ABRT|MX_FL_HTX|MX_FL_HOL_RISK|MX_FL_NO_UPG,
Willy Tarreau62f52692017-10-08 23:01:42 +02006926 .name = "H2",
6927};
6928
Christopher Faulet32f61c02018-04-10 14:33:41 +02006929static struct mux_proto_list mux_proto_h2 =
Christopher Fauletc985f6c2019-07-15 11:42:52 +02006930 { .token = IST("h2"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BOTH, .mux = &h2_ops };
Willy Tarreau62f52692017-10-08 23:01:42 +02006931
Willy Tarreau0108d902018-11-25 19:14:37 +01006932INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2);
6933
Willy Tarreau62f52692017-10-08 23:01:42 +02006934/* config keyword parsers */
6935static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006936 { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size },
Willy Tarreaue6baec02017-07-27 11:45:11 +02006937 { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size },
Willy Tarreau5242ef82017-07-27 11:47:28 +02006938 { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006939 { CFG_GLOBAL, "tune.h2.max-frame-size", h2_parse_max_frame_size },
Willy Tarreau62f52692017-10-08 23:01:42 +02006940 { 0, NULL, NULL }
6941}};
6942
Willy Tarreau0108d902018-11-25 19:14:37 +01006943INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
Willy Tarreau2bdcc702020-05-19 11:31:11 +02006944
6945/* initialize internal structs after the config is parsed.
6946 * Returns zero on success, non-zero on error.
6947 */
6948static int init_h2()
6949{
6950 pool_head_hpack_tbl = create_pool("hpack_tbl",
6951 h2_settings_header_table_size,
6952 MEM_F_SHARED|MEM_F_EXACT);
Christopher Faulet52140992020-11-06 15:23:39 +01006953 if (!pool_head_hpack_tbl) {
6954 ha_alert("failed to allocate hpack_tbl memory pool\n");
6955 return (ERR_ALERT | ERR_FATAL);
6956 }
6957 return ERR_NONE;
Willy Tarreau2bdcc702020-05-19 11:31:11 +02006958}
6959
6960REGISTER_POST_CHECK(init_h2);