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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 Tarreauf5b2c3f2022-03-18 15:57:34 +0100990 h2c->idle_start = now_ms;
Willy Tarreau3f133572017-10-31 19:21:06 +0100991 if (tick_isset(h2c->timeout)) {
992 t = task_new(tid_bit);
993 if (!t)
994 goto fail;
995
996 h2c->task = t;
997 t->process = h2_timeout_task;
998 t->context = h2c;
999 t->expire = tick_add(now_ms, h2c->timeout);
1000 }
Willy Tarreauea392822017-10-31 10:02:25 +01001001
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001002 h2c->wait_event.tasklet = tasklet_new();
1003 if (!h2c->wait_event.tasklet)
Olivier Houchard910b2bc2018-07-17 18:49:38 +02001004 goto fail;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001005 h2c->wait_event.tasklet->process = h2_io_cb;
1006 h2c->wait_event.tasklet->context = h2c;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001007 h2c->wait_event.events = 0;
Amaury Denoyelled3a88c12021-05-03 10:47:51 +02001008 if (!conn_is_back(conn)) {
1009 /* Connection might already be in the stopping_list if subject
1010 * to h1->h2 upgrade.
1011 */
1012 if (!LIST_INLIST(&conn->stopping_list)) {
1013 LIST_APPEND(&mux_stopping_data[tid].list,
1014 &conn->stopping_list);
1015 }
1016 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02001017
Willy Tarreau2bdcc702020-05-19 11:31:11 +02001018 h2c->ddht = hpack_dht_alloc();
Willy Tarreau32218eb2017-09-22 08:07:25 +02001019 if (!h2c->ddht)
1020 goto fail;
1021
1022 /* Initialise the context. */
1023 h2c->st0 = H2_CS_PREFACE;
1024 h2c->conn = conn;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01001025 h2c->streams_limit = h2_settings_max_concurrent_streams;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001026 h2c->max_id = -1;
1027 h2c->errcode = H2_ERR_NO_ERROR;
Willy Tarreau97aaa672018-12-23 09:49:04 +01001028 h2c->rcvd_c = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001029 h2c->rcvd_s = 0;
Willy Tarreau49745612017-12-03 18:56:02 +01001030 h2c->nb_streams = 0;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001031 h2c->nb_cs = 0;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001032 h2c->nb_reserved = 0;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001033 h2c->stream_cnt = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001034
Christopher Faulet51f73eb2019-04-08 11:22:47 +02001035 h2c->dbuf = *input;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001036 h2c->dsi = -1;
1037 h2c->msi = -1;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001038
Willy Tarreau32218eb2017-09-22 08:07:25 +02001039 h2c->last_sid = -1;
1040
Willy Tarreau51330962019-05-26 09:38:07 +02001041 br_init(h2c->mbuf, sizeof(h2c->mbuf) / sizeof(h2c->mbuf[0]));
Willy Tarreau32218eb2017-09-22 08:07:25 +02001042 h2c->miw = 65535; /* mux initial window size */
1043 h2c->mws = 65535; /* mux window size */
1044 h2c->mfs = 16384; /* initial max frame size */
Willy Tarreau751f2d02018-10-05 09:35:00 +02001045 h2c->streams_by_id = EB_ROOT;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001046 LIST_INIT(&h2c->send_list);
1047 LIST_INIT(&h2c->fctl_list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +02001048 LIST_INIT(&h2c->blocked_list);
Willy Tarreau90f366b2021-02-20 11:49:49 +01001049 LIST_INIT(&h2c->buf_wait.list);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001050
Christopher Fauletf81ef032019-10-04 15:19:43 +02001051 conn->ctx = h2c;
1052
Willy Tarreaue2f68e92021-06-16 17:47:24 +02001053 TRACE_USER("new H2 connection", H2_EV_H2C_NEW, conn);
1054
Willy Tarreau3f133572017-10-31 19:21:06 +01001055 if (t)
1056 task_queue(t);
Willy Tarreauea392822017-10-31 10:02:25 +01001057
Willy Tarreau01b44822018-10-03 14:26:37 +02001058 if (h2c->flags & H2_CF_IS_BACK) {
1059 /* FIXME: this is temporary, for outgoing connections we need
1060 * to immediately allocate a stream until the code is modified
1061 * so that the caller calls ->attach(). For now the outgoing cs
Christopher Fauletf81ef032019-10-04 15:19:43 +02001062 * is stored as conn->ctx by the caller and saved in conn_ctx.
Willy Tarreau01b44822018-10-03 14:26:37 +02001063 */
1064 struct h2s *h2s;
1065
Christopher Fauletf81ef032019-10-04 15:19:43 +02001066 h2s = h2c_bck_stream_new(h2c, conn_ctx, sess);
Willy Tarreau01b44822018-10-03 14:26:37 +02001067 if (!h2s)
1068 goto fail_stream;
1069 }
1070
Willy Tarreau4781b152021-04-06 13:53:36 +02001071 HA_ATOMIC_INC(&h2c->px_counters->open_conns);
1072 HA_ATOMIC_INC(&h2c->px_counters->total_conns);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001073
Willy Tarreau0f383582018-10-03 14:22:21 +02001074 /* prepare to read something */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02001075 h2c_restart_reading(h2c, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001076 TRACE_LEAVE(H2_EV_H2C_NEW, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001077 return 0;
Willy Tarreau01b44822018-10-03 14:26:37 +02001078 fail_stream:
1079 hpack_dht_free(h2c->ddht);
mildiscd2d7de2018-10-02 16:44:18 +02001080 fail:
Willy Tarreauf6562792019-05-07 19:05:35 +02001081 task_destroy(t);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001082 if (h2c->wait_event.tasklet)
1083 tasklet_free(h2c->wait_event.tasklet);
Willy Tarreaubafbe012017-11-24 17:34:44 +01001084 pool_free(pool_head_h2c, h2c);
mildiscd2d7de2018-10-02 16:44:18 +02001085 fail_no_h2c:
Willy Tarreau8802bf12022-01-12 17:24:26 +01001086 if (!conn_is_back(conn))
1087 LIST_DEL_INIT(&conn->stopping_list);
Christopher Fauletf81ef032019-10-04 15:19:43 +02001088 conn->ctx = conn_ctx; /* restore saved ctx */
1089 TRACE_DEVEL("leaving in error", H2_EV_H2C_NEW|H2_EV_H2C_END|H2_EV_H2C_ERR);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001090 return -1;
1091}
1092
Willy Tarreau751f2d02018-10-05 09:35:00 +02001093/* returns the next allocatable outgoing stream ID for the H2 connection, or
1094 * -1 if no more is allocatable.
1095 */
1096static inline int32_t h2c_get_next_sid(const struct h2c *h2c)
1097{
1098 int32_t id = (h2c->max_id + 1) | 1;
Willy Tarreaua80dca82019-01-24 17:08:28 +01001099
1100 if ((id & 0x80000000U) || (h2c->last_sid >= 0 && id > h2c->last_sid))
Willy Tarreau751f2d02018-10-05 09:35:00 +02001101 id = -1;
1102 return id;
1103}
1104
Willy Tarreau2373acc2017-10-12 17:35:14 +02001105/* returns the stream associated with id <id> or NULL if not found */
1106static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id)
1107{
1108 struct eb32_node *node;
1109
Willy Tarreau751f2d02018-10-05 09:35:00 +02001110 if (id == 0)
1111 return (struct h2s *)h2_closed_stream;
1112
Willy Tarreau2a856182017-05-16 15:20:39 +02001113 if (id > h2c->max_id)
1114 return (struct h2s *)h2_idle_stream;
1115
Willy Tarreau2373acc2017-10-12 17:35:14 +02001116 node = eb32_lookup(&h2c->streams_by_id, id);
1117 if (!node)
Willy Tarreau2a856182017-05-16 15:20:39 +02001118 return (struct h2s *)h2_closed_stream;
Willy Tarreau2373acc2017-10-12 17:35:14 +02001119
1120 return container_of(node, struct h2s, by_id);
1121}
1122
Christopher Faulet73c12072019-04-08 11:23:22 +02001123/* release function. This one should be called to free all resources allocated
1124 * to the mux.
Willy Tarreau62f52692017-10-08 23:01:42 +02001125 */
Christopher Faulet73c12072019-04-08 11:23:22 +02001126static void h2_release(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02001127{
William Dauchy477757c2020-08-07 22:19:23 +02001128 struct connection *conn = NULL;
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001129
Willy Tarreau7838a792019-08-12 18:42:03 +02001130 TRACE_ENTER(H2_EV_H2C_END);
1131
Willy Tarreau32218eb2017-09-22 08:07:25 +02001132 if (h2c) {
Christopher Faulet61840e72019-04-15 09:33:32 +02001133 /* The connection must be aattached to this mux to be released */
1134 if (h2c->conn && h2c->conn->ctx == h2c)
1135 conn = h2c->conn;
1136
Willy Tarreau7838a792019-08-12 18:42:03 +02001137 TRACE_DEVEL("freeing h2c", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001138 hpack_dht_free(h2c->ddht);
Willy Tarreau14398122017-09-22 14:26:04 +02001139
Willy Tarreau2b718102021-04-21 07:32:39 +02001140 if (LIST_INLIST(&h2c->buf_wait.list))
Willy Tarreau90f366b2021-02-20 11:49:49 +01001141 LIST_DEL_INIT(&h2c->buf_wait.list);
Willy Tarreau14398122017-09-22 14:26:04 +02001142
Willy Tarreau44e973f2018-03-01 17:49:30 +01001143 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau2e3c0002019-05-26 09:45:23 +02001144 h2_release_mbuf(h2c);
Willy Tarreau44e973f2018-03-01 17:49:30 +01001145
Willy Tarreauea392822017-10-31 10:02:25 +01001146 if (h2c->task) {
Willy Tarreau0975f112018-03-29 15:22:59 +02001147 h2c->task->context = NULL;
1148 task_wakeup(h2c->task, TASK_WOKEN_OTHER);
Willy Tarreauea392822017-10-31 10:02:25 +01001149 h2c->task = NULL;
1150 }
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001151 if (h2c->wait_event.tasklet)
1152 tasklet_free(h2c->wait_event.tasklet);
Christopher Faulet21d849f2019-09-18 11:07:20 +02001153 if (conn && h2c->wait_event.events != 0)
Olivier Houcharde179d0e2019-03-21 18:27:17 +01001154 conn->xprt->unsubscribe(conn, conn->xprt_ctx, h2c->wait_event.events,
Christopher Faulet21d849f2019-09-18 11:07:20 +02001155 &h2c->wait_event);
Willy Tarreauea392822017-10-31 10:02:25 +01001156
Willy Tarreau4781b152021-04-06 13:53:36 +02001157 HA_ATOMIC_DEC(&h2c->px_counters->open_conns);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001158
Willy Tarreaubafbe012017-11-24 17:34:44 +01001159 pool_free(pool_head_h2c, h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001160 }
1161
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001162 if (conn) {
Amaury Denoyelled3a88c12021-05-03 10:47:51 +02001163 if (!conn_is_back(conn))
1164 LIST_DEL_INIT(&conn->stopping_list);
1165
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001166 conn->mux = NULL;
1167 conn->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02001168 TRACE_DEVEL("freeing conn", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001169
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001170 conn_stop_tracking(conn);
Willy Tarreaudaa0e5f2021-10-21 22:24:31 +02001171
1172 /* there might be a GOAWAY frame still pending in the TCP
1173 * stack, and if the peer continues to send (i.e. window
1174 * updates etc), this can result in losing the GOAWAY. For
1175 * this reason we try to drain anything received in between.
1176 */
1177 conn->flags |= CO_FL_WANT_DRAIN;
1178
1179 conn_xprt_shutw(conn);
1180 conn_xprt_close(conn);
1181 conn_sock_shutw(conn, !conn_is_back(conn));
1182 conn_ctrl_close(conn);
1183
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001184 if (conn->destroy_cb)
1185 conn->destroy_cb(conn);
1186 conn_free(conn);
1187 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001188
1189 TRACE_LEAVE(H2_EV_H2C_END);
Willy Tarreau62f52692017-10-08 23:01:42 +02001190}
1191
1192
Willy Tarreau71681172017-10-23 14:39:06 +02001193/******************************************************/
1194/* functions below are for the H2 protocol processing */
1195/******************************************************/
1196
1197/* returns the stream if of stream <h2s> or 0 if <h2s> is NULL */
Willy Tarreau1f094672017-11-20 21:27:45 +01001198static inline __maybe_unused int h2s_id(const struct h2s *h2s)
Willy Tarreau71681172017-10-23 14:39:06 +02001199{
1200 return h2s ? h2s->id : 0;
1201}
1202
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001203/* returns the sum of the stream's own window size and the mux's initial
1204 * window, which together form the stream's effective window size.
1205 */
1206static inline int h2s_mws(const struct h2s *h2s)
1207{
1208 return h2s->sws + h2s->h2c->miw;
1209}
1210
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001211/* returns true of the mux is currently busy as seen from stream <h2s> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001212static inline __maybe_unused int h2c_mux_busy(const struct h2c *h2c, const struct h2s *h2s)
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001213{
1214 if (h2c->msi < 0)
1215 return 0;
1216
1217 if (h2c->msi == h2s_id(h2s))
1218 return 0;
1219
1220 return 1;
1221}
1222
Willy Tarreauec26f622022-04-13 09:40:52 +02001223/* marks an error on the connection. Before settings are sent, we must not send
1224 * a GOAWAY frame, and the error state will prevent h2c_send_goaway_error()
1225 * from verifying this so we set H2_CF_GOAWAY_FAILED to make sure it will not
1226 * even try.
1227 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001228static inline __maybe_unused void h2c_error(struct h2c *h2c, enum h2_err err)
Willy Tarreau741d6df2017-10-17 08:00:59 +02001229{
Willy Tarreau022e5e52020-09-10 09:33:15 +02001230 TRACE_POINT(H2_EV_H2C_ERR, h2c->conn, 0, 0, (void *)(long)(err));
Willy Tarreau741d6df2017-10-17 08:00:59 +02001231 h2c->errcode = err;
Willy Tarreauec26f622022-04-13 09:40:52 +02001232 if (h2c->st0 < H2_CS_SETTINGS1)
1233 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau741d6df2017-10-17 08:00:59 +02001234 h2c->st0 = H2_CS_ERROR;
1235}
1236
Willy Tarreau175cebb2019-01-24 10:02:24 +01001237/* marks an error on the stream. It may also update an already closed stream
1238 * (e.g. to report an error after an RST was received).
1239 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001240static inline __maybe_unused void h2s_error(struct h2s *h2s, enum h2_err err)
Willy Tarreau2e43f082017-10-17 08:03:59 +02001241{
Willy Tarreau175cebb2019-01-24 10:02:24 +01001242 if (h2s->id && h2s->st != H2_SS_ERROR) {
Willy Tarreau022e5e52020-09-10 09:33:15 +02001243 TRACE_POINT(H2_EV_H2S_ERR, h2s->h2c->conn, h2s, 0, (void *)(long)(err));
Willy Tarreau2e43f082017-10-17 08:03:59 +02001244 h2s->errcode = err;
Willy Tarreau175cebb2019-01-24 10:02:24 +01001245 if (h2s->st < H2_SS_ERROR)
1246 h2s->st = H2_SS_ERROR;
Willy Tarreauec988c72018-12-19 18:00:29 +01001247 if (h2s->cs)
1248 cs_set_error(h2s->cs);
Willy Tarreau2e43f082017-10-17 08:03:59 +02001249 }
1250}
1251
Willy Tarreau7e094452018-12-19 18:08:52 +01001252/* attempt to notify the data layer of recv availability */
1253static void __maybe_unused h2s_notify_recv(struct h2s *h2s)
1254{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001255 if (h2s->subs && h2s->subs->events & SUB_RETRY_RECV) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001256 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01001257 tasklet_wakeup(h2s->subs->tasklet);
1258 h2s->subs->events &= ~SUB_RETRY_RECV;
1259 if (!h2s->subs->events)
1260 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001261 }
1262}
1263
1264/* attempt to notify the data layer of send availability */
1265static void __maybe_unused h2s_notify_send(struct h2s *h2s)
1266{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001267 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001268 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01001269 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01001270 tasklet_wakeup(h2s->subs->tasklet);
1271 h2s->subs->events &= ~SUB_RETRY_SEND;
1272 if (!h2s->subs->events)
1273 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001274 }
Willy Tarreau5723f292020-01-10 15:16:57 +01001275 else if (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) {
1276 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
1277 tasklet_wakeup(h2s->shut_tl);
1278 }
Willy Tarreau7e094452018-12-19 18:08:52 +01001279}
1280
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001281/* alerts the data layer, trying to wake it up by all means, following
1282 * this sequence :
1283 * - if the h2s' data layer is subscribed to recv, then it's woken up for recv
1284 * - if its subscribed to send, then it's woken up for send
1285 * - if it was subscribed to neither, its ->wake() callback is called
1286 * It is safe to call this function with a closed stream which doesn't have a
1287 * conn_stream anymore.
1288 */
1289static void __maybe_unused h2s_alert(struct h2s *h2s)
1290{
Willy Tarreau7838a792019-08-12 18:42:03 +02001291 TRACE_ENTER(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
1292
Willy Tarreauf96508a2020-01-10 11:12:48 +01001293 if (h2s->subs ||
Willy Tarreau5723f292020-01-10 15:16:57 +01001294 (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW))) {
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001295 h2s_notify_recv(h2s);
1296 h2s_notify_send(h2s);
1297 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001298 else if (h2s->cs && h2s->cs->data_cb->wake != NULL) {
1299 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001300 h2s->cs->data_cb->wake(h2s->cs);
Willy Tarreau7838a792019-08-12 18:42:03 +02001301 }
1302
1303 TRACE_LEAVE(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001304}
1305
Willy Tarreaue4820742017-07-27 13:37:23 +02001306/* writes the 24-bit frame size <len> at address <frame> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001307static inline __maybe_unused void h2_set_frame_size(void *frame, uint32_t len)
Willy Tarreaue4820742017-07-27 13:37:23 +02001308{
1309 uint8_t *out = frame;
1310
1311 *out = len >> 16;
1312 write_n16(out + 1, len);
1313}
1314
Willy Tarreau54c15062017-10-10 17:10:03 +02001315/* reads <bytes> bytes from buffer <b> starting at relative offset <o> from the
1316 * current pointer, dealing with wrapping, and stores the result in <dst>. It's
1317 * the caller's responsibility to verify that there are at least <bytes> bytes
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001318 * available in the buffer's input prior to calling this function. The buffer
1319 * is assumed not to hold any output data.
Willy Tarreau54c15062017-10-10 17:10:03 +02001320 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001321static inline __maybe_unused void h2_get_buf_bytes(void *dst, size_t bytes,
Willy Tarreau54c15062017-10-10 17:10:03 +02001322 const struct buffer *b, int o)
1323{
Willy Tarreau591d4452018-06-15 17:21:00 +02001324 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 +02001325}
1326
Willy Tarreau1f094672017-11-20 21:27:45 +01001327static inline __maybe_unused uint16_t h2_get_n16(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001328{
Willy Tarreau591d4452018-06-15 17:21:00 +02001329 return readv_n16(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001330}
1331
Willy Tarreau1f094672017-11-20 21:27:45 +01001332static inline __maybe_unused uint32_t h2_get_n32(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001333{
Willy Tarreau591d4452018-06-15 17:21:00 +02001334 return readv_n32(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001335}
1336
Willy Tarreau1f094672017-11-20 21:27:45 +01001337static inline __maybe_unused uint64_t h2_get_n64(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001338{
Willy Tarreau591d4452018-06-15 17:21:00 +02001339 return readv_n64(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001340}
1341
1342
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001343/* Peeks an H2 frame header from offset <o> of buffer <b> into descriptor <h>.
1344 * The algorithm is not obvious. It turns out that H2 headers are neither
1345 * aligned nor do they use regular sizes. And to add to the trouble, the buffer
1346 * may wrap so each byte read must be checked. The header is formed like this :
Willy Tarreau715d5312017-07-11 15:20:24 +02001347 *
1348 * b0 b1 b2 b3 b4 b5..b8
1349 * +----------+---------+--------+----+----+----------------------+
1350 * |len[23:16]|len[15:8]|len[7:0]|type|flag|sid[31:0] (big endian)|
1351 * +----------+---------+--------+----+----+----------------------+
1352 *
1353 * Here we read a big-endian 64 bit word from h[1]. This way in a single read
1354 * we get the sid properly aligned and ordered, and 16 bits of len properly
1355 * ordered as well. The type and flags can be extracted using bit shifts from
1356 * the word, and only one extra read is needed to fetch len[16:23].
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001357 * Returns zero if some bytes are missing, otherwise non-zero on success. The
1358 * buffer is assumed not to contain any output data.
Willy Tarreau715d5312017-07-11 15:20:24 +02001359 */
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001360static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, int o, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001361{
1362 uint64_t w;
1363
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001364 if (b_data(b) < o + 9)
Willy Tarreau715d5312017-07-11 15:20:24 +02001365 return 0;
1366
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001367 w = h2_get_n64(b, o + 1);
1368 h->len = *(uint8_t*)b_peek(b, o) << 16;
Willy Tarreau715d5312017-07-11 15:20:24 +02001369 h->sid = w & 0x7FFFFFFF; /* RFC7540#4.1: R bit must be ignored */
1370 h->ff = w >> 32;
1371 h->ft = w >> 40;
1372 h->len += w >> 48;
1373 return 1;
1374}
1375
1376/* skip the next 9 bytes corresponding to the frame header possibly parsed by
1377 * h2_peek_frame_hdr() above.
1378 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001379static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b)
Willy Tarreau715d5312017-07-11 15:20:24 +02001380{
Willy Tarreaue5f12ce2018-06-15 10:28:05 +02001381 b_del(b, 9);
Willy Tarreau715d5312017-07-11 15:20:24 +02001382}
1383
1384/* same as above, automatically advances the buffer on success */
Willy Tarreau1f094672017-11-20 21:27:45 +01001385static inline __maybe_unused int h2_get_frame_hdr(struct buffer *b, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001386{
1387 int ret;
1388
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001389 ret = h2_peek_frame_hdr(b, 0, h);
Willy Tarreau715d5312017-07-11 15:20:24 +02001390 if (ret > 0)
1391 h2_skip_frame_hdr(b);
1392 return ret;
1393}
1394
Willy Tarreaucb985a42019-10-07 16:56:34 +02001395
1396/* try to fragment the headers frame present at the beginning of buffer <b>,
1397 * enforcing a limit of <mfs> bytes per frame. Returns 0 on failure, 1 on
1398 * success. Typical causes of failure include a buffer not large enough to
1399 * add extra frame headers. The existing frame size is read in the current
1400 * frame. Its EH flag will be cleared if CONTINUATION frames need to be added,
1401 * and its length will be adjusted. The stream ID for continuation frames will
1402 * be copied from the initial frame's.
1403 */
1404static int h2_fragment_headers(struct buffer *b, uint32_t mfs)
1405{
1406 size_t remain = b->data - 9;
1407 int extra_frames = (remain - 1) / mfs;
1408 size_t fsize;
1409 char *fptr;
1410 int frame;
1411
1412 if (b->data <= mfs + 9)
1413 return 1;
1414
1415 /* Too large a frame, we need to fragment it using CONTINUATION
1416 * frames. We start from the end and move tails as needed.
1417 */
1418 if (b->data + extra_frames * 9 > b->size)
1419 return 0;
1420
1421 for (frame = extra_frames; frame; frame--) {
1422 fsize = ((remain - 1) % mfs) + 1;
1423 remain -= fsize;
1424
1425 /* move data */
1426 fptr = b->area + 9 + remain + (frame - 1) * 9;
1427 memmove(fptr + 9, b->area + 9 + remain, fsize);
1428 b->data += 9;
1429
1430 /* write new frame header */
1431 h2_set_frame_size(fptr, fsize);
1432 fptr[3] = H2_FT_CONTINUATION;
1433 fptr[4] = (frame == extra_frames) ? H2_F_HEADERS_END_HEADERS : 0;
1434 write_n32(fptr + 5, read_n32(b->area + 5));
1435 }
1436
1437 b->area[4] &= ~H2_F_HEADERS_END_HEADERS;
1438 h2_set_frame_size(b->area, remain);
1439 return 1;
1440}
1441
1442
Willy Tarreau00dd0782018-03-01 16:31:34 +01001443/* marks stream <h2s> as CLOSED and decrement the number of active streams for
1444 * its connection if the stream was not yet closed. Please use this exclusively
1445 * before closing a stream to ensure stream count is well maintained.
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001446 */
Willy Tarreau00dd0782018-03-01 16:31:34 +01001447static inline void h2s_close(struct h2s *h2s)
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001448{
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001449 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001450 TRACE_ENTER(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001451 h2s->h2c->nb_streams--;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001452 if (!h2s->id)
1453 h2s->h2c->nb_reserved--;
Willy Tarreaua27db382019-03-25 18:13:16 +01001454 if (h2s->cs) {
Willy Tarreaua27db382019-03-25 18:13:16 +01001455 if (!(h2s->cs->flags & CS_FL_EOS) && !b_data(&h2s->rxbuf))
1456 h2s_notify_recv(h2s);
1457 }
Willy Tarreau4781b152021-04-06 13:53:36 +02001458 HA_ATOMIC_DEC(&h2s->h2c->px_counters->open_streams);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001459
Willy Tarreau7838a792019-08-12 18:42:03 +02001460 TRACE_LEAVE(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001461 }
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001462 h2s->st = H2_SS_CLOSED;
1463}
1464
Willy Tarreau71049cc2018-03-28 13:56:39 +02001465/* detaches an H2 stream from its H2C and releases it to the H2S pool. */
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001466/* h2s_destroy should only ever be called by the thread that owns the stream,
1467 * that means that a tasklet should be used if we want to destroy the h2s
1468 * from another thread
1469 */
Willy Tarreau71049cc2018-03-28 13:56:39 +02001470static void h2s_destroy(struct h2s *h2s)
Willy Tarreau0a10de62018-03-01 16:27:53 +01001471{
Willy Tarreau7838a792019-08-12 18:42:03 +02001472 struct connection *conn = h2s->h2c->conn;
1473
1474 TRACE_ENTER(H2_EV_H2S_END, conn, h2s);
1475
Willy Tarreau0a10de62018-03-01 16:27:53 +01001476 h2s_close(h2s);
1477 eb32_delete(&h2s->by_id);
Olivier Houchard638b7992018-08-16 15:41:52 +02001478 if (b_size(&h2s->rxbuf)) {
1479 b_free(&h2s->rxbuf);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01001480 offer_buffers(NULL, 1);
Olivier Houchard638b7992018-08-16 15:41:52 +02001481 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001482
1483 if (h2s->subs)
1484 h2s->subs->events = 0;
1485
Joseph Herlantd77575d2018-11-25 10:54:45 -08001486 /* There's no need to explicitly call unsubscribe here, the only
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001487 * reference left would be in the h2c send_list/fctl_list, and if
1488 * we're in it, we're getting out anyway
1489 */
Olivier Houchardd360ac62019-03-22 17:37:16 +01001490 LIST_DEL_INIT(&h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01001491
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001492 /* ditto, calling tasklet_free() here should be ok */
Willy Tarreau5723f292020-01-10 15:16:57 +01001493 tasklet_free(h2s->shut_tl);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001494 pool_free(pool_head_h2s, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001495
1496 TRACE_LEAVE(H2_EV_H2S_END, conn);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001497}
1498
Willy Tarreaua8e49542018-10-03 18:53:55 +02001499/* allocates a new stream <id> for connection <h2c> and adds it into h2c's
1500 * stream tree. In case of error, nothing is added and NULL is returned. The
1501 * causes of errors can be any failed memory allocation. The caller is
1502 * responsible for checking if the connection may support an extra stream
1503 * prior to calling this function.
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001504 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02001505static struct h2s *h2s_new(struct h2c *h2c, int id)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001506{
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001507 struct h2s *h2s;
1508
Willy Tarreau7838a792019-08-12 18:42:03 +02001509 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1510
Willy Tarreaubafbe012017-11-24 17:34:44 +01001511 h2s = pool_alloc(pool_head_h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001512 if (!h2s)
1513 goto out;
1514
Willy Tarreau5723f292020-01-10 15:16:57 +01001515 h2s->shut_tl = tasklet_new();
1516 if (!h2s->shut_tl) {
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001517 pool_free(pool_head_h2s, h2s);
1518 goto out;
1519 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001520 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01001521 h2s->shut_tl->process = h2_deferred_shut;
1522 h2s->shut_tl->context = h2s;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001523 LIST_INIT(&h2s->list);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001524 h2s->h2c = h2c;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001525 h2s->cs = NULL;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001526 h2s->sws = 0;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001527 h2s->flags = H2_SF_NONE;
1528 h2s->errcode = H2_ERR_NO_ERROR;
1529 h2s->st = H2_SS_IDLE;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02001530 h2s->status = 0;
Willy Tarreau1915ca22019-01-24 11:49:37 +01001531 h2s->body_len = 0;
Olivier Houchard638b7992018-08-16 15:41:52 +02001532 h2s->rxbuf = BUF_NULL;
Amaury Denoyelle74162742020-12-11 17:53:05 +01001533 memset(h2s->upgrade_protocol, 0, sizeof(h2s->upgrade_protocol));
Willy Tarreau751f2d02018-10-05 09:35:00 +02001534
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001535 h2s->by_id.key = h2s->id = id;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001536 if (id > 0)
1537 h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001538 else
1539 h2c->nb_reserved++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001540
1541 eb32_insert(&h2c->streams_by_id, &h2s->by_id);
Willy Tarreau49745612017-12-03 18:56:02 +01001542 h2c->nb_streams++;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001543 h2c->stream_cnt++;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001544
Willy Tarreau4781b152021-04-06 13:53:36 +02001545 HA_ATOMIC_INC(&h2c->px_counters->open_streams);
1546 HA_ATOMIC_INC(&h2c->px_counters->total_streams);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001547
Willy Tarreau7838a792019-08-12 18:42:03 +02001548 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001549 return h2s;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001550 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001551 TRACE_DEVEL("leaving in error", H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001552 return NULL;
1553}
1554
1555/* creates a new stream <id> on the h2c connection and returns it, or NULL in
Christopher Faulet7d013e72020-12-15 16:56:50 +01001556 * case of memory allocation error. <input> is used as input buffer for the new
1557 * stream. On success, it is transferred to the stream and the mux is no longer
1558 * responsible of it. On error, <input> is unchanged, thus the mux must still
1559 * take care of it.
Willy Tarreaua8e49542018-10-03 18:53:55 +02001560 */
Amaury Denoyelleee7fcd52021-10-18 14:45:49 +02001561static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id, struct buffer *input, uint32_t flags)
Willy Tarreaua8e49542018-10-03 18:53:55 +02001562{
1563 struct session *sess = h2c->conn->owner;
1564 struct conn_stream *cs;
1565 struct h2s *h2s;
1566
Willy Tarreau7838a792019-08-12 18:42:03 +02001567 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1568
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001569 if (h2c->nb_streams >= h2_settings_max_concurrent_streams) {
1570 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 +02001571 goto out;
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001572 }
Willy Tarreaua8e49542018-10-03 18:53:55 +02001573
1574 h2s = h2s_new(h2c, id);
1575 if (!h2s)
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001576 goto out_alloc;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001577
Christopher Faulet236c93b2020-07-02 09:19:54 +02001578 cs = cs_new(h2c->conn, h2c->conn->target);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001579 if (!cs)
1580 goto out_close;
1581
Olivier Houchard746fb772018-12-15 19:42:00 +01001582 cs->flags |= CS_FL_NOT_FIRST;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001583 h2s->cs = cs;
1584 cs->ctx = h2s;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001585 h2c->nb_cs++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001586
Amaury Denoyelleee7fcd52021-10-18 14:45:49 +02001587 /* FIXME wrong analogy between ext-connect and websocket, this need to
1588 * be refine.
1589 */
1590 if (flags & H2_SF_EXT_CONNECT_RCVD)
1591 cs->flags |= CS_FL_WEBSOCKET;
1592
Willy Tarreaua217df92022-02-04 09:05:37 +01001593 /* The stream will record the request's accept date (which is either the
1594 * end of the connection's or the date immediately after the previous
1595 * request) and the idle time, which is the delay since the previous
1596 * request. We can set the value now, it will be copied by stream_new().
1597 */
1598 sess->t_idle = tv_ms_elapsed(&sess->tv_accept, &now) - sess->t_handshake;
Christopher Faulet7d013e72020-12-15 16:56:50 +01001599 if (stream_create_from_cs(cs, input) < 0)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001600 goto out_free_cs;
1601
Willy Tarreau590a0512018-09-05 11:56:48 +02001602 /* We want the accept date presented to the next stream to be the one
1603 * we have now, the handshake time to be null (since the next stream
1604 * is not delayed by a handshake), and the idle time to count since
1605 * right now.
1606 */
1607 sess->accept_date = date;
1608 sess->tv_accept = now;
1609 sess->t_handshake = 0;
Willy Tarreaua217df92022-02-04 09:05:37 +01001610 sess->t_idle = 0;
Willy Tarreau590a0512018-09-05 11:56:48 +02001611
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001612 /* OK done, the stream lives its own life now */
Willy Tarreaufa1d3572019-01-31 10:31:51 +01001613 if (h2_frt_has_too_many_cs(h2c))
Willy Tarreauf2101912018-07-19 10:11:38 +02001614 h2c->flags |= H2_CF_DEM_TOOMANY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001615 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001616 return h2s;
1617
1618 out_free_cs:
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001619 h2c->nb_cs--;
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01001620 if (!h2c->nb_cs)
1621 h2c->idle_start = now_ms;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001622 cs_free(cs);
Olivier Houchard58d87f32019-05-29 16:44:17 +02001623 h2s->cs = NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001624 out_close:
Willy Tarreau71049cc2018-03-28 13:56:39 +02001625 h2s_destroy(h2s);
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001626 out_alloc:
1627 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 +02001628 out:
Willy Tarreau45efc072018-10-03 18:27:52 +02001629 sess_log(sess);
Willy Tarreau7838a792019-08-12 18:42:03 +02001630 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreau45efc072018-10-03 18:27:52 +02001631 return NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001632}
1633
Willy Tarreau751f2d02018-10-05 09:35:00 +02001634/* allocates a new stream associated to conn_stream <cs> on the h2c connection
1635 * and returns it, or NULL in case of memory allocation error or if the highest
1636 * possible stream ID was reached.
1637 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01001638static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001639{
1640 struct h2s *h2s = NULL;
1641
Willy Tarreau7838a792019-08-12 18:42:03 +02001642 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1643
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001644 if (h2c->nb_streams >= h2c->streams_limit) {
1645 TRACE_ERROR("Aborting stream since negotiated limit is too low", H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001646 goto out;
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001647 }
Willy Tarreau751f2d02018-10-05 09:35:00 +02001648
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001649 if (h2_streams_left(h2c) < 1) {
1650 TRACE_ERROR("Aborting stream since no more streams left", H2_EV_H2S_NEW, h2c->conn);
Willy Tarreaua80dca82019-01-24 17:08:28 +01001651 goto out;
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001652 }
Willy Tarreaua80dca82019-01-24 17:08:28 +01001653
Willy Tarreau751f2d02018-10-05 09:35:00 +02001654 /* Defer choosing the ID until we send the first message to create the stream */
1655 h2s = h2s_new(h2c, 0);
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001656 if (!h2s) {
1657 TRACE_ERROR("Failed to allocate a new stream", H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001658 goto out;
Willy Tarreau715c8fc2022-05-12 09:24:41 +02001659 }
Willy Tarreau751f2d02018-10-05 09:35:00 +02001660
1661 h2s->cs = cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001662 h2s->sess = sess;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001663 cs->ctx = h2s;
1664 h2c->nb_cs++;
1665
Willy Tarreau751f2d02018-10-05 09:35:00 +02001666 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001667 if (likely(h2s))
1668 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
1669 else
1670 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn, h2s);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001671 return h2s;
1672}
1673
Willy Tarreaube5b7152017-09-25 16:25:39 +02001674/* try to send a settings frame on the connection. Returns > 0 on success, 0 if
1675 * it couldn't do anything. It may return an error in h2c. See RFC7540#11.3 for
1676 * the various settings codes.
1677 */
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001678static int h2c_send_settings(struct h2c *h2c)
Willy Tarreaube5b7152017-09-25 16:25:39 +02001679{
1680 struct buffer *res;
1681 char buf_data[100]; // enough for 15 settings
Willy Tarreau83061a82018-07-13 11:56:34 +02001682 struct buffer buf;
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001683 int mfs;
Willy Tarreau7838a792019-08-12 18:42:03 +02001684 int ret = 0;
1685
1686 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001687
1688 if (h2c_mux_busy(h2c, NULL)) {
1689 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001690 goto out;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001691 }
1692
Willy Tarreaube5b7152017-09-25 16:25:39 +02001693 chunk_init(&buf, buf_data, sizeof(buf_data));
1694 chunk_memcpy(&buf,
1695 "\x00\x00\x00" /* length : 0 for now */
1696 "\x04\x00" /* type : 4 (settings), flags : 0 */
1697 "\x00\x00\x00\x00", /* stream ID : 0 */
1698 9);
1699
Willy Tarreau0bbad6b2019-02-26 16:01:52 +01001700 if (h2c->flags & H2_CF_IS_BACK) {
1701 /* send settings_enable_push=0 */
1702 chunk_memcat(&buf, "\x00\x02\x00\x00\x00\x00", 6);
1703 }
1704
Amaury Denoyelle0ea2c4f2021-07-09 17:14:30 +02001705 /* rfc 8441 #3 SETTINGS_ENABLE_CONNECT_PROTOCOL=1,
1706 * sent automatically unless disabled in the global config */
1707 if (!(global.tune.options & GTUNE_DISABLE_H2_WEBSOCKET))
1708 chunk_memcat(&buf, "\x00\x08\x00\x00\x00\x01", 6);
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01001709
Willy Tarreaube5b7152017-09-25 16:25:39 +02001710 if (h2_settings_header_table_size != 4096) {
1711 char str[6] = "\x00\x01"; /* header_table_size */
1712
1713 write_n32(str + 2, h2_settings_header_table_size);
1714 chunk_memcat(&buf, str, 6);
1715 }
1716
1717 if (h2_settings_initial_window_size != 65535) {
1718 char str[6] = "\x00\x04"; /* initial_window_size */
1719
1720 write_n32(str + 2, h2_settings_initial_window_size);
1721 chunk_memcat(&buf, str, 6);
1722 }
1723
1724 if (h2_settings_max_concurrent_streams != 0) {
1725 char str[6] = "\x00\x03"; /* max_concurrent_streams */
1726
1727 /* Note: 0 means "unlimited" for haproxy's config but not for
1728 * the protocol, so never send this value!
1729 */
1730 write_n32(str + 2, h2_settings_max_concurrent_streams);
1731 chunk_memcat(&buf, str, 6);
1732 }
1733
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001734 mfs = h2_settings_max_frame_size;
1735 if (mfs > global.tune.bufsize)
1736 mfs = global.tune.bufsize;
1737
1738 if (!mfs)
1739 mfs = global.tune.bufsize;
1740
1741 if (mfs != 16384) {
Willy Tarreaube5b7152017-09-25 16:25:39 +02001742 char str[6] = "\x00\x05"; /* max_frame_size */
1743
1744 /* note: similarly we could also emit MAX_HEADER_LIST_SIZE to
1745 * match bufsize - rewrite size, but at the moment it seems
1746 * that clients don't take care of it.
1747 */
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001748 write_n32(str + 2, mfs);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001749 chunk_memcat(&buf, str, 6);
1750 }
1751
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001752 h2_set_frame_size(buf.area, buf.data - 9);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001753
1754 res = br_tail(h2c->mbuf);
1755 retry:
1756 if (!h2_get_buf(h2c, res)) {
1757 h2c->flags |= H2_CF_MUX_MALLOC;
1758 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001759 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001760 }
1761
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001762 ret = b_istput(res, ist2(buf.area, buf.data));
Willy Tarreaube5b7152017-09-25 16:25:39 +02001763 if (unlikely(ret <= 0)) {
1764 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001765 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1766 goto retry;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001767 h2c->flags |= H2_CF_MUX_MFULL;
1768 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001769 }
1770 else {
1771 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001772 ret = 0;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001773 }
1774 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001775 out:
1776 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001777 return ret;
1778}
1779
Willy Tarreau52eed752017-09-22 15:05:09 +02001780/* Try to receive a connection preface, then upon success try to send our
1781 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1782 * missing data. It may return an error in h2c.
1783 */
1784static int h2c_frt_recv_preface(struct h2c *h2c)
1785{
1786 int ret1;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001787 int ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001788
Willy Tarreau7838a792019-08-12 18:42:03 +02001789 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
1790
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001791 ret1 = b_isteq(&h2c->dbuf, 0, b_data(&h2c->dbuf), ist(H2_CONN_PREFACE));
Willy Tarreau52eed752017-09-22 15:05:09 +02001792
1793 if (unlikely(ret1 <= 0)) {
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02001794 if (!ret1)
1795 h2c->flags |= H2_CF_DEM_SHORT_READ;
Amaury Denoyellea8879232020-10-27 17:16:03 +01001796 if (ret1 < 0 || conn_xprt_read0_pending(h2c->conn)) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01001797 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 +02001798 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc23d6d12021-06-17 08:08:48 +02001799 if (b_data(&h2c->dbuf) ||
1800 !(((const struct session *)h2c->conn->owner)->fe->options & PR_O_IGNORE_PRB))
1801 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Amaury Denoyellea8879232020-10-27 17:16:03 +01001802 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001803 ret2 = 0;
1804 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02001805 }
1806
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001807 ret2 = h2c_send_settings(h2c);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001808 if (ret2 > 0)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001809 b_del(&h2c->dbuf, ret1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001810 out:
1811 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001812 return ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001813}
1814
Willy Tarreau01b44822018-10-03 14:26:37 +02001815/* Try to send a connection preface, then upon success try to send our
1816 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1817 * missing data. It may return an error in h2c.
1818 */
1819static int h2c_bck_send_preface(struct h2c *h2c)
1820{
1821 struct buffer *res;
Willy Tarreau7838a792019-08-12 18:42:03 +02001822 int ret = 0;
1823
1824 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02001825
1826 if (h2c_mux_busy(h2c, NULL)) {
1827 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001828 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001829 }
1830
Willy Tarreaubcc45952019-05-26 10:05:50 +02001831 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001832 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001833 if (!h2_get_buf(h2c, res)) {
Willy Tarreau01b44822018-10-03 14:26:37 +02001834 h2c->flags |= H2_CF_MUX_MALLOC;
1835 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001836 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001837 }
1838
1839 if (!b_data(res)) {
1840 /* preface not yet sent */
Willy Tarreau9c218e72019-05-26 10:08:28 +02001841 ret = b_istput(res, ist(H2_CONN_PREFACE));
1842 if (unlikely(ret <= 0)) {
1843 if (!ret) {
1844 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1845 goto retry;
1846 h2c->flags |= H2_CF_MUX_MFULL;
1847 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001848 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001849 }
1850 else {
1851 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001852 ret = 0;
1853 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001854 }
1855 }
Willy Tarreau01b44822018-10-03 14:26:37 +02001856 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001857 ret = h2c_send_settings(h2c);
1858 out:
1859 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
1860 return ret;
Willy Tarreau01b44822018-10-03 14:26:37 +02001861}
1862
Willy Tarreau081d4722017-05-16 21:51:05 +02001863/* try to send a GOAWAY frame on the connection to report an error or a graceful
1864 * shutdown, with h2c->errcode as the error code. Returns > 0 on success or zero
1865 * if nothing was done. It uses h2c->last_sid as the advertised ID, or copies it
1866 * from h2c->max_id if it's not set yet (<0). In case of lack of room to write
1867 * the message, it subscribes the requester (either <h2s> or <h2c>) to future
1868 * notifications. It sets H2_CF_GOAWAY_SENT on success, and H2_CF_GOAWAY_FAILED
1869 * on unrecoverable failure. It will not attempt to send one again in this last
Willy Tarreauec26f622022-04-13 09:40:52 +02001870 * case, nor will it send one if settings were not sent (e.g. still waiting for
1871 * a preface) so that it is safe to use h2c_error() to report such errors.
Willy Tarreau081d4722017-05-16 21:51:05 +02001872 */
1873static int h2c_send_goaway_error(struct h2c *h2c, struct h2s *h2s)
1874{
1875 struct buffer *res;
1876 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02001877 int ret = 0;
Willy Tarreau081d4722017-05-16 21:51:05 +02001878
Willy Tarreau7838a792019-08-12 18:42:03 +02001879 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
1880
Willy Tarreauec26f622022-04-13 09:40:52 +02001881 if ((h2c->flags & H2_CF_GOAWAY_FAILED) || h2c->st0 < H2_CS_SETTINGS1) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001882 ret = 1; // claim that it worked
1883 goto out;
1884 }
Willy Tarreau081d4722017-05-16 21:51:05 +02001885
1886 if (h2c_mux_busy(h2c, h2s)) {
1887 if (h2s)
1888 h2s->flags |= H2_SF_BLK_MBUSY;
1889 else
1890 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001891 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001892 }
1893
Willy Tarreau9c218e72019-05-26 10:08:28 +02001894 /* len: 8, type: 7, flags: none, sid: 0 */
1895 memcpy(str, "\x00\x00\x08\x07\x00\x00\x00\x00\x00", 9);
1896
1897 if (h2c->last_sid < 0)
1898 h2c->last_sid = h2c->max_id;
1899
1900 write_n32(str + 9, h2c->last_sid);
1901 write_n32(str + 13, h2c->errcode);
1902
Willy Tarreaubcc45952019-05-26 10:05:50 +02001903 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001904 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001905 if (!h2_get_buf(h2c, res)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02001906 h2c->flags |= H2_CF_MUX_MALLOC;
1907 if (h2s)
1908 h2s->flags |= H2_SF_BLK_MROOM;
1909 else
1910 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001911 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001912 }
1913
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001914 ret = b_istput(res, ist2(str, 17));
Willy Tarreau081d4722017-05-16 21:51:05 +02001915 if (unlikely(ret <= 0)) {
1916 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001917 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1918 goto retry;
Willy Tarreau081d4722017-05-16 21:51:05 +02001919 h2c->flags |= H2_CF_MUX_MFULL;
1920 if (h2s)
1921 h2s->flags |= H2_SF_BLK_MROOM;
1922 else
1923 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001924 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001925 }
1926 else {
1927 /* we cannot report this error using GOAWAY, so we mark
1928 * it and claim a success.
1929 */
1930 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1931 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau7838a792019-08-12 18:42:03 +02001932 ret = 1;
1933 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001934 }
1935 }
1936 h2c->flags |= H2_CF_GOAWAY_SENT;
Willy Tarreauf965b2a2020-12-01 10:47:18 +01001937
1938 /* some codes are not for real errors, just attempts to close cleanly */
1939 switch (h2c->errcode) {
1940 case H2_ERR_NO_ERROR:
1941 case H2_ERR_ENHANCE_YOUR_CALM:
1942 case H2_ERR_REFUSED_STREAM:
1943 case H2_ERR_CANCEL:
1944 break;
1945 default:
Willy Tarreau4781b152021-04-06 13:53:36 +02001946 HA_ATOMIC_INC(&h2c->px_counters->goaway_resp);
Willy Tarreauf965b2a2020-12-01 10:47:18 +01001947 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001948 out:
1949 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
Willy Tarreau081d4722017-05-16 21:51:05 +02001950 return ret;
1951}
1952
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001953/* Try to send an RST_STREAM frame on the connection for the indicated stream
1954 * during mux operations. This stream must be valid and cannot be closed
1955 * already. h2s->id will be used for the stream ID and h2s->errcode will be
1956 * used for the error code. h2s->st will be update to H2_SS_CLOSED if it was
1957 * not yet.
1958 *
1959 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1960 * to write the message, it subscribes the stream to future notifications.
1961 */
1962static int h2s_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1963{
1964 struct buffer *res;
1965 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001966 int ret = 0;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001967
Willy Tarreau7838a792019-08-12 18:42:03 +02001968 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
1969
1970 if (!h2s || h2s->st == H2_SS_CLOSED) {
1971 ret = 1;
1972 goto out;
1973 }
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001974
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001975 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1976 * RST_STREAM in response to a RST_STREAM frame.
1977 */
Willy Tarreau231f6162019-08-06 10:01:40 +02001978 if (h2c->dsi == h2s->id && h2c->dft == H2_FT_RST_STREAM) {
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001979 ret = 1;
1980 goto ignore;
1981 }
1982
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001983 if (h2c_mux_busy(h2c, h2s)) {
1984 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001985 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001986 }
1987
Willy Tarreau9c218e72019-05-26 10:08:28 +02001988 /* len: 4, type: 3, flags: none */
1989 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1990 write_n32(str + 5, h2s->id);
1991 write_n32(str + 9, h2s->errcode);
1992
Willy Tarreaubcc45952019-05-26 10:05:50 +02001993 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001994 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001995 if (!h2_get_buf(h2c, res)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001996 h2c->flags |= H2_CF_MUX_MALLOC;
1997 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001998 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001999 }
2000
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002001 ret = b_istput(res, ist2(str, 13));
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002002 if (unlikely(ret <= 0)) {
2003 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002004 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2005 goto retry;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002006 h2c->flags |= H2_CF_MUX_MFULL;
2007 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002008 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002009 }
2010 else {
2011 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002012 ret = 0;
2013 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002014 }
2015 }
2016
Willy Tarreau8adae7c2018-03-22 17:37:05 +01002017 ignore:
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002018 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01002019 h2s_close(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002020 out:
2021 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002022 return ret;
2023}
2024
2025/* Try to send an RST_STREAM frame on the connection for the stream being
2026 * demuxed using h2c->dsi for the stream ID. It will use h2s->errcode as the
Willy Tarreaue6888ff2018-12-23 18:26:26 +01002027 * error code, even if the stream is one of the dummy ones, and will update
2028 * h2s->st to H2_SS_CLOSED if it was not yet.
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002029 *
2030 * Returns > 0 on success or zero if nothing was done. In case of lack of room
2031 * to write the message, it blocks the demuxer and subscribes it to future
Joseph Herlantd77575d2018-11-25 10:54:45 -08002032 * notifications. It's worth mentioning that an RST may even be sent for a
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002033 * closed stream.
Willy Tarreau27a84c92017-10-17 08:10:17 +02002034 */
2035static int h2c_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
2036{
2037 struct buffer *res;
2038 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002039 int ret = 0;
2040
2041 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02002042
Willy Tarreau8adae7c2018-03-22 17:37:05 +01002043 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
2044 * RST_STREAM in response to a RST_STREAM frame.
2045 */
2046 if (h2c->dft == H2_FT_RST_STREAM) {
2047 ret = 1;
2048 goto ignore;
2049 }
2050
Willy Tarreau27a84c92017-10-17 08:10:17 +02002051 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002052 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002053 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002054 }
2055
Willy Tarreau9c218e72019-05-26 10:08:28 +02002056 /* len: 4, type: 3, flags: none */
2057 memcpy(str, "\x00\x00\x04\x03\x00", 5);
2058
2059 write_n32(str + 5, h2c->dsi);
2060 write_n32(str + 9, h2s->errcode);
2061
Willy Tarreaubcc45952019-05-26 10:05:50 +02002062 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002063 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002064 if (!h2_get_buf(h2c, res)) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02002065 h2c->flags |= H2_CF_MUX_MALLOC;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002066 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002067 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002068 }
2069
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002070 ret = b_istput(res, ist2(str, 13));
Willy Tarreau27a84c92017-10-17 08:10:17 +02002071 if (unlikely(ret <= 0)) {
2072 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002073 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2074 goto retry;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002075 h2c->flags |= H2_CF_MUX_MFULL;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002076 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002077 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002078 }
2079 else {
2080 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002081 ret = 0;
2082 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002083 }
2084 }
2085
Willy Tarreau8adae7c2018-03-22 17:37:05 +01002086 ignore:
Willy Tarreauab0e1da2018-10-05 10:16:37 +02002087 if (h2s->id) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02002088 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01002089 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002090 }
2091
Willy Tarreau7838a792019-08-12 18:42:03 +02002092 out:
Willy Tarreau4781b152021-04-06 13:53:36 +02002093 HA_ATOMIC_INC(&h2c->px_counters->rst_stream_resp);
Willy Tarreau7838a792019-08-12 18:42:03 +02002094 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02002095 return ret;
2096}
2097
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002098/* try to send an empty DATA frame with the ES flag set to notify about the
2099 * end of stream and match a shutdown(write). If an ES was already sent as
2100 * indicated by HLOC/ERROR/RESET/CLOSED states, nothing is done. Returns > 0
2101 * on success or zero if nothing was done. In case of lack of room to write the
2102 * message, it subscribes the requesting stream to future notifications.
2103 */
2104static int h2_send_empty_data_es(struct h2s *h2s)
2105{
2106 struct h2c *h2c = h2s->h2c;
2107 struct buffer *res;
2108 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002109 int ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002110
Willy Tarreau7838a792019-08-12 18:42:03 +02002111 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
2112
2113 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED) {
2114 ret = 1;
2115 goto out;
2116 }
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002117
2118 if (h2c_mux_busy(h2c, h2s)) {
2119 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002120 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002121 }
2122
Willy Tarreau9c218e72019-05-26 10:08:28 +02002123 /* len: 0x000000, type: 0(DATA), flags: ES=1 */
2124 memcpy(str, "\x00\x00\x00\x00\x01", 5);
2125 write_n32(str + 5, h2s->id);
2126
Willy Tarreaubcc45952019-05-26 10:05:50 +02002127 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002128 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002129 if (!h2_get_buf(h2c, res)) {
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002130 h2c->flags |= H2_CF_MUX_MALLOC;
2131 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002132 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002133 }
2134
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002135 ret = b_istput(res, ist2(str, 9));
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002136 if (likely(ret > 0)) {
2137 h2s->flags |= H2_SF_ES_SENT;
2138 }
2139 else if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002140 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2141 goto retry;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002142 h2c->flags |= H2_CF_MUX_MFULL;
2143 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002144 }
2145 else {
2146 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002147 ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002148 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002149 out:
2150 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002151 return ret;
2152}
2153
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05002154/* wake a specific stream and assign its conn_stream some CS_FL_* flags among
Willy Tarreau99ad1b32019-05-14 11:46:28 +02002155 * CS_FL_ERR_PENDING and CS_FL_ERROR if needed. The stream's state
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002156 * is automatically updated accordingly. If the stream is orphaned, it is
2157 * destroyed.
Christopher Fauletf02ca002019-03-07 16:21:34 +01002158 */
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002159static void h2s_wake_one_stream(struct h2s *h2s)
Christopher Fauletf02ca002019-03-07 16:21:34 +01002160{
Willy Tarreau7838a792019-08-12 18:42:03 +02002161 struct h2c *h2c = h2s->h2c;
2162
2163 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn, h2s);
2164
Christopher Fauletf02ca002019-03-07 16:21:34 +01002165 if (!h2s->cs) {
2166 /* this stream was already orphaned */
2167 h2s_destroy(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002168 TRACE_DEVEL("leaving with no h2s", H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002169 return;
2170 }
2171
Christopher Fauletaade4ed2020-10-08 15:38:41 +02002172 if (h2c_read0_pending(h2s->h2c)) {
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002173 if (h2s->st == H2_SS_OPEN)
2174 h2s->st = H2_SS_HREM;
2175 else if (h2s->st == H2_SS_HLOC)
2176 h2s_close(h2s);
2177 }
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002178
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002179 if ((h2s->h2c->st0 >= H2_CS_ERROR || h2s->h2c->conn->flags & CO_FL_ERROR) ||
2180 (h2s->h2c->last_sid > 0 && (!h2s->id || h2s->id > h2s->h2c->last_sid))) {
2181 h2s->cs->flags |= CS_FL_ERR_PENDING;
2182 if (h2s->cs->flags & CS_FL_EOS)
2183 h2s->cs->flags |= CS_FL_ERROR;
Willy Tarreau23482912019-05-07 15:23:14 +02002184
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002185 if (h2s->st < H2_SS_ERROR)
2186 h2s->st = H2_SS_ERROR;
2187 }
Christopher Fauletf02ca002019-03-07 16:21:34 +01002188
2189 h2s_alert(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002190 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002191}
2192
2193/* wake the streams attached to the connection, whose id is greater than <last>
2194 * or unassigned.
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002195 */
Willy Tarreau23482912019-05-07 15:23:14 +02002196static void h2_wake_some_streams(struct h2c *h2c, int last)
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002197{
2198 struct eb32_node *node;
2199 struct h2s *h2s;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002200
Willy Tarreau7838a792019-08-12 18:42:03 +02002201 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn);
2202
Christopher Fauletf02ca002019-03-07 16:21:34 +01002203 /* Wake all streams with ID > last */
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002204 node = eb32_lookup_ge(&h2c->streams_by_id, last + 1);
2205 while (node) {
2206 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002207 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002208 h2s_wake_one_stream(h2s);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002209 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01002210
Christopher Fauletf02ca002019-03-07 16:21:34 +01002211 /* Wake all streams with unassigned ID (ID == 0) */
2212 node = eb32_lookup(&h2c->streams_by_id, 0);
2213 while (node) {
2214 h2s = container_of(node, struct h2s, by_id);
2215 if (h2s->id > 0)
2216 break;
2217 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002218 h2s_wake_one_stream(h2s);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002219 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002220
2221 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002222}
2223
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002224/* Wake up all blocked streams whose window size has become positive after the
2225 * mux's initial window was adjusted. This should be done after having processed
2226 * SETTINGS frames which have updated the mux's initial window size.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002227 */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002228static void h2c_unblock_sfctl(struct h2c *h2c)
Willy Tarreau3421aba2017-07-27 15:41:03 +02002229{
2230 struct h2s *h2s;
2231 struct eb32_node *node;
2232
Willy Tarreau7838a792019-08-12 18:42:03 +02002233 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
2234
Willy Tarreau3421aba2017-07-27 15:41:03 +02002235 node = eb32_first(&h2c->streams_by_id);
2236 while (node) {
2237 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002238 if (h2s->flags & H2_SF_BLK_SFCTL && h2s_mws(h2s) > 0) {
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002239 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002240 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002241 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2242 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreau2b718102021-04-21 07:32:39 +02002243 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002244 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002245 node = eb32_next(node);
2246 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002247
2248 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002249}
2250
2251/* processes a SETTINGS frame whose payload is <payload> for <plen> bytes, and
2252 * ACKs it if needed. Returns > 0 on success or zero on missing data. It may
Willy Tarreaub860c732019-01-30 15:39:55 +01002253 * return an error in h2c. The caller must have already verified frame length
2254 * and stream ID validity. Described in RFC7540#6.5.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002255 */
2256static int h2c_handle_settings(struct h2c *h2c)
2257{
2258 unsigned int offset;
2259 int error;
2260
Willy Tarreau7838a792019-08-12 18:42:03 +02002261 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
2262
Willy Tarreau3421aba2017-07-27 15:41:03 +02002263 if (h2c->dff & H2_F_SETTINGS_ACK) {
2264 if (h2c->dfl) {
2265 error = H2_ERR_FRAME_SIZE_ERROR;
2266 goto fail;
2267 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002268 goto done;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002269 }
2270
Willy Tarreau3421aba2017-07-27 15:41:03 +02002271 /* process full frame only */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002272 if (b_data(&h2c->dbuf) < h2c->dfl) {
2273 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002274 goto out0;
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002275 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002276
2277 /* parse the frame */
2278 for (offset = 0; offset < h2c->dfl; offset += 6) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002279 uint16_t type = h2_get_n16(&h2c->dbuf, offset);
2280 int32_t arg = h2_get_n32(&h2c->dbuf, offset + 2);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002281
2282 switch (type) {
2283 case H2_SETTINGS_INITIAL_WINDOW_SIZE:
2284 /* we need to update all existing streams with the
2285 * difference from the previous iws.
2286 */
2287 if (arg < 0) { // RFC7540#6.5.2
2288 error = H2_ERR_FLOW_CONTROL_ERROR;
2289 goto fail;
2290 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002291 h2c->miw = arg;
2292 break;
2293 case H2_SETTINGS_MAX_FRAME_SIZE:
2294 if (arg < 16384 || arg > 16777215) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002295 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 +02002296 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002297 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002298 goto fail;
2299 }
2300 h2c->mfs = arg;
2301 break;
Willy Tarreau8a4dca02022-01-13 16:00:12 +01002302 case H2_SETTINGS_HEADER_TABLE_SIZE:
2303 h2c->flags |= H2_CF_SHTS_UPDATED;
2304 break;
Willy Tarreau1b38b462017-12-03 19:02:28 +01002305 case H2_SETTINGS_ENABLE_PUSH:
2306 if (arg < 0 || arg > 1) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002307 TRACE_ERROR("ENABLE_PUSH out of range", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002308 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002309 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002310 goto fail;
2311 }
2312 break;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01002313 case H2_SETTINGS_MAX_CONCURRENT_STREAMS:
2314 if (h2c->flags & H2_CF_IS_BACK) {
2315 /* the limit is only for the backend; for the frontend it is our limit */
2316 if ((unsigned int)arg > h2_settings_max_concurrent_streams)
2317 arg = h2_settings_max_concurrent_streams;
2318 h2c->streams_limit = arg;
2319 }
2320 break;
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01002321 case H2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
Amaury Denoyelle68993a12021-10-18 09:43:29 +02002322 if (arg == 1)
2323 h2c->flags |= H2_CF_RCVD_RFC8441;
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01002324 break;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002325 }
2326 }
2327
2328 /* need to ACK this frame now */
2329 h2c->st0 = H2_CS_FRAME_A;
Willy Tarreau7838a792019-08-12 18:42:03 +02002330 done:
2331 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002332 return 1;
2333 fail:
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002334 if (!(h2c->flags & H2_CF_IS_BACK))
2335 sess_log(h2c->conn->owner);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002336 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002337 out0:
2338 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 +02002339 return 0;
2340}
2341
2342/* try to send an ACK for a settings frame on the connection. Returns > 0 on
2343 * success or one of the h2_status values.
2344 */
2345static int h2c_ack_settings(struct h2c *h2c)
2346{
2347 struct buffer *res;
2348 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002349 int ret = 0;
2350
2351 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002352
2353 if (h2c_mux_busy(h2c, NULL)) {
2354 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002355 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002356 }
2357
Willy Tarreau9c218e72019-05-26 10:08:28 +02002358 memcpy(str,
2359 "\x00\x00\x00" /* length : 0 (no data) */
2360 "\x04" "\x01" /* type : 4, flags : ACK */
2361 "\x00\x00\x00\x00" /* stream ID */, 9);
2362
Willy Tarreaubcc45952019-05-26 10:05:50 +02002363 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002364 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002365 if (!h2_get_buf(h2c, res)) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02002366 h2c->flags |= H2_CF_MUX_MALLOC;
2367 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002368 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002369 }
2370
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002371 ret = b_istput(res, ist2(str, 9));
Willy Tarreau3421aba2017-07-27 15:41:03 +02002372 if (unlikely(ret <= 0)) {
2373 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002374 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2375 goto retry;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002376 h2c->flags |= H2_CF_MUX_MFULL;
2377 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002378 }
2379 else {
2380 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002381 ret = 0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002382 }
2383 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002384 out:
2385 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002386 return ret;
2387}
2388
Willy Tarreaucf68c782017-10-10 17:11:41 +02002389/* processes a PING frame and schedules an ACK if needed. The caller must pass
2390 * the pointer to the payload in <payload>. Returns > 0 on success or zero on
Willy Tarreaub860c732019-01-30 15:39:55 +01002391 * missing data. The caller must have already verified frame length
2392 * and stream ID validity.
Willy Tarreaucf68c782017-10-10 17:11:41 +02002393 */
2394static int h2c_handle_ping(struct h2c *h2c)
2395{
Willy Tarreaucf68c782017-10-10 17:11:41 +02002396 /* schedule a response */
Willy Tarreau68ed6412017-12-03 18:15:56 +01002397 if (!(h2c->dff & H2_F_PING_ACK))
Willy Tarreaucf68c782017-10-10 17:11:41 +02002398 h2c->st0 = H2_CS_FRAME_A;
2399 return 1;
2400}
2401
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002402/* Try to send a window update for stream id <sid> and value <increment>.
2403 * Returns > 0 on success or zero on missing room or failure. It may return an
2404 * error in h2c.
2405 */
2406static int h2c_send_window_update(struct h2c *h2c, int sid, uint32_t increment)
2407{
2408 struct buffer *res;
2409 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002410 int ret = 0;
2411
2412 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002413
2414 if (h2c_mux_busy(h2c, NULL)) {
2415 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002416 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002417 }
2418
Willy Tarreau9c218e72019-05-26 10:08:28 +02002419 /* length: 4, type: 8, flags: none */
2420 memcpy(str, "\x00\x00\x04\x08\x00", 5);
2421 write_n32(str + 5, sid);
2422 write_n32(str + 9, increment);
2423
Willy Tarreaubcc45952019-05-26 10:05:50 +02002424 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002425 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002426 if (!h2_get_buf(h2c, res)) {
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002427 h2c->flags |= H2_CF_MUX_MALLOC;
2428 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002429 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002430 }
2431
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002432 ret = b_istput(res, ist2(str, 13));
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002433 if (unlikely(ret <= 0)) {
2434 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002435 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2436 goto retry;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002437 h2c->flags |= H2_CF_MUX_MFULL;
2438 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002439 }
2440 else {
2441 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002442 ret = 0;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002443 }
2444 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002445 out:
2446 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002447 return ret;
2448}
2449
2450/* try to send pending window update for the connection. It's safe to call it
2451 * with no pending updates. Returns > 0 on success or zero on missing room or
2452 * failure. It may return an error in h2c.
2453 */
2454static int h2c_send_conn_wu(struct h2c *h2c)
2455{
2456 int ret = 1;
2457
Willy Tarreau7838a792019-08-12 18:42:03 +02002458 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2459
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002460 if (h2c->rcvd_c <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002461 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002462
Willy Tarreau97aaa672018-12-23 09:49:04 +01002463 if (!(h2c->flags & H2_CF_WINDOW_OPENED)) {
2464 /* increase the advertised connection window to 2G on
2465 * first update.
2466 */
2467 h2c->flags |= H2_CF_WINDOW_OPENED;
2468 h2c->rcvd_c += H2_INITIAL_WINDOW_INCREMENT;
2469 }
2470
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002471 /* send WU for the connection */
2472 ret = h2c_send_window_update(h2c, 0, h2c->rcvd_c);
2473 if (ret > 0)
2474 h2c->rcvd_c = 0;
2475
Willy Tarreau7838a792019-08-12 18:42:03 +02002476 out:
2477 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002478 return ret;
2479}
2480
2481/* try to send pending window update for the current dmux stream. It's safe to
2482 * call it with no pending updates. Returns > 0 on success or zero on missing
2483 * room or failure. It may return an error in h2c.
2484 */
2485static int h2c_send_strm_wu(struct h2c *h2c)
2486{
2487 int ret = 1;
2488
Willy Tarreau7838a792019-08-12 18:42:03 +02002489 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2490
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002491 if (h2c->rcvd_s <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002492 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002493
2494 /* send WU for the stream */
2495 ret = h2c_send_window_update(h2c, h2c->dsi, h2c->rcvd_s);
2496 if (ret > 0)
2497 h2c->rcvd_s = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002498 out:
2499 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002500 return ret;
2501}
2502
Willy Tarreaucf68c782017-10-10 17:11:41 +02002503/* try to send an ACK for a ping frame on the connection. Returns > 0 on
2504 * success, 0 on missing data or one of the h2_status values.
2505 */
2506static int h2c_ack_ping(struct h2c *h2c)
2507{
2508 struct buffer *res;
2509 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02002510 int ret = 0;
2511
2512 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002513
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002514 if (b_data(&h2c->dbuf) < 8)
Willy Tarreau7838a792019-08-12 18:42:03 +02002515 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002516
2517 if (h2c_mux_busy(h2c, NULL)) {
2518 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002519 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002520 }
2521
Willy Tarreaucf68c782017-10-10 17:11:41 +02002522 memcpy(str,
2523 "\x00\x00\x08" /* length : 8 (same payload) */
2524 "\x06" "\x01" /* type : 6, flags : ACK */
2525 "\x00\x00\x00\x00" /* stream ID */, 9);
2526
2527 /* copy the original payload */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002528 h2_get_buf_bytes(str + 9, 8, &h2c->dbuf, 0);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002529
Willy Tarreau9c218e72019-05-26 10:08:28 +02002530 res = br_tail(h2c->mbuf);
2531 retry:
2532 if (!h2_get_buf(h2c, res)) {
2533 h2c->flags |= H2_CF_MUX_MALLOC;
2534 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002535 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02002536 }
2537
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002538 ret = b_istput(res, ist2(str, 17));
Willy Tarreaucf68c782017-10-10 17:11:41 +02002539 if (unlikely(ret <= 0)) {
2540 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002541 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2542 goto retry;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002543 h2c->flags |= H2_CF_MUX_MFULL;
2544 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002545 }
2546 else {
2547 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002548 ret = 0;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002549 }
2550 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002551 out:
2552 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002553 return ret;
2554}
2555
Willy Tarreau26f95952017-07-27 17:18:30 +02002556/* processes a WINDOW_UPDATE frame whose payload is <payload> for <plen> bytes.
2557 * Returns > 0 on success or zero on missing data. It may return an error in
Willy Tarreaub860c732019-01-30 15:39:55 +01002558 * h2c or h2s. The caller must have already verified frame length and stream ID
2559 * validity. Described in RFC7540#6.9.
Willy Tarreau26f95952017-07-27 17:18:30 +02002560 */
2561static int h2c_handle_window_update(struct h2c *h2c, struct h2s *h2s)
2562{
2563 int32_t inc;
2564 int error;
2565
Willy Tarreau7838a792019-08-12 18:42:03 +02002566 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
2567
Willy Tarreau26f95952017-07-27 17:18:30 +02002568 /* process full frame only */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002569 if (b_data(&h2c->dbuf) < h2c->dfl) {
2570 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002571 goto out0;
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002572 }
Willy Tarreau26f95952017-07-27 17:18:30 +02002573
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002574 inc = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau26f95952017-07-27 17:18:30 +02002575
2576 if (h2c->dsi != 0) {
2577 /* stream window update */
Willy Tarreau26f95952017-07-27 17:18:30 +02002578
2579 /* it's not an error to receive WU on a closed stream */
2580 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau7838a792019-08-12 18:42:03 +02002581 goto done;
Willy Tarreau26f95952017-07-27 17:18:30 +02002582
2583 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002584 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 +02002585 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002586 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002587 goto strm_err;
2588 }
2589
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002590 if (h2s_mws(h2s) >= 0 && h2s_mws(h2s) + inc < 0) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002591 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 +02002592 error = H2_ERR_FLOW_CONTROL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002593 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002594 goto strm_err;
2595 }
2596
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002597 h2s->sws += inc;
2598 if (h2s_mws(h2s) > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002599 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002600 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002601 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2602 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreau2b718102021-04-21 07:32:39 +02002603 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreau26f95952017-07-27 17:18:30 +02002604 }
2605 }
2606 else {
2607 /* connection window update */
2608 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002609 TRACE_ERROR("conn WINDOW_UPDATE inc=0", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002610 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002611 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002612 goto conn_err;
2613 }
2614
2615 if (h2c->mws >= 0 && h2c->mws + inc < 0) {
2616 error = H2_ERR_FLOW_CONTROL_ERROR;
2617 goto conn_err;
2618 }
2619
2620 h2c->mws += inc;
2621 }
2622
Willy Tarreau7838a792019-08-12 18:42:03 +02002623 done:
2624 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002625 return 1;
2626
2627 conn_err:
2628 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002629 out0:
2630 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 +02002631 return 0;
2632
2633 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002634 h2s_error(h2s, error);
2635 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002636 TRACE_DEVEL("leaving on stream error", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002637 return 0;
2638}
2639
Willy Tarreaue96b0922017-10-30 00:28:29 +01002640/* processes a GOAWAY frame, and signals all streams whose ID is greater than
Willy Tarreaub860c732019-01-30 15:39:55 +01002641 * the last ID. Returns > 0 on success or zero on missing data. The caller must
2642 * have already verified frame length and stream ID validity. Described in
2643 * RFC7540#6.8.
Willy Tarreaue96b0922017-10-30 00:28:29 +01002644 */
2645static int h2c_handle_goaway(struct h2c *h2c)
2646{
Willy Tarreaue96b0922017-10-30 00:28:29 +01002647 int last;
2648
Willy Tarreau7838a792019-08-12 18:42:03 +02002649 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002650 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002651 if (b_data(&h2c->dbuf) < h2c->dfl) {
2652 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002653 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002654 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002655 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01002656
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002657 last = h2_get_n32(&h2c->dbuf, 0);
2658 h2c->errcode = h2_get_n32(&h2c->dbuf, 4);
Willy Tarreau11cc2d62017-12-03 10:27:47 +01002659 if (h2c->last_sid < 0)
2660 h2c->last_sid = last;
Willy Tarreau23482912019-05-07 15:23:14 +02002661 h2_wake_some_streams(h2c, last);
Willy Tarreau7838a792019-08-12 18:42:03 +02002662 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002663 return 1;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002664}
2665
Willy Tarreau92153fc2017-12-03 19:46:19 +01002666/* processes a PRIORITY frame, and either skips it or rejects if it is
Willy Tarreaub860c732019-01-30 15:39:55 +01002667 * invalid. Returns > 0 on success or zero on missing data. It may return an
2668 * error in h2c. The caller must have already verified frame length and stream
2669 * ID validity. Described in RFC7540#6.3.
Willy Tarreau92153fc2017-12-03 19:46:19 +01002670 */
2671static int h2c_handle_priority(struct h2c *h2c)
2672{
Willy Tarreau7838a792019-08-12 18:42:03 +02002673 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
2674
Willy Tarreau92153fc2017-12-03 19:46:19 +01002675 /* process full frame only */
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002676 if (b_data(&h2c->dbuf) < h2c->dfl) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002677 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002678 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002679 return 0;
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002680 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01002681
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002682 if (h2_get_n32(&h2c->dbuf, 0) == h2c->dsi) {
Willy Tarreau92153fc2017-12-03 19:46:19 +01002683 /* 7540#5.3 : can't depend on itself */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002684 TRACE_ERROR("PRIORITY depends on itself", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002685 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02002686 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002687 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002688 return 0;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002689 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002690 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002691 return 1;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002692}
2693
Willy Tarreaucd234e92017-08-18 10:59:39 +02002694/* processes an RST_STREAM frame, and sets the 32-bit error code on the stream.
Willy Tarreaub860c732019-01-30 15:39:55 +01002695 * Returns > 0 on success or zero on missing data. The caller must have already
2696 * verified frame length and stream ID validity. Described in RFC7540#6.4.
Willy Tarreaucd234e92017-08-18 10:59:39 +02002697 */
2698static int h2c_handle_rst_stream(struct h2c *h2c, struct h2s *h2s)
2699{
Willy Tarreau7838a792019-08-12 18:42:03 +02002700 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
2701
Willy Tarreaucd234e92017-08-18 10:59:39 +02002702 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002703 if (b_data(&h2c->dbuf) < h2c->dfl) {
2704 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 +02002705 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002706 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002707 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002708
2709 /* late RST, already handled */
Willy Tarreau7838a792019-08-12 18:42:03 +02002710 if (h2s->st == H2_SS_CLOSED) {
2711 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 +02002712 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002713 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002714
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002715 h2s->errcode = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau00dd0782018-03-01 16:31:34 +01002716 h2s_close(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002717
2718 if (h2s->cs) {
Willy Tarreauec988c72018-12-19 18:00:29 +01002719 cs_set_error(h2s->cs);
Willy Tarreauf830f012018-12-19 17:44:55 +01002720 h2s_alert(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002721 }
2722
2723 h2s->flags |= H2_SF_RST_RCVD;
Willy Tarreau7838a792019-08-12 18:42:03 +02002724 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002725 return 1;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002726}
2727
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002728/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2729 * It may return an error in h2c or h2s. The caller must consider that the
2730 * return value is the new h2s in case one was allocated (most common case).
2731 * Described in RFC7540#6.2. Most of the
Willy Tarreau13278b42017-10-13 19:23:14 +02002732 * errors here are reported as connection errors since it's impossible to
2733 * recover from such errors after the compression context has been altered.
2734 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002735static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau13278b42017-10-13 19:23:14 +02002736{
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002737 struct buffer rxbuf = BUF_NULL;
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002738 unsigned long long body_len = 0;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002739 uint32_t flags = 0;
Willy Tarreau13278b42017-10-13 19:23:14 +02002740 int error;
2741
Willy Tarreau7838a792019-08-12 18:42:03 +02002742 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2743
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002744 if (!b_size(&h2c->dbuf)) {
2745 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002746 goto out; // empty buffer
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002747 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002748
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002749 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2750 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002751 goto out; // incomplete frame
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002752 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002753
2754 /* now either the frame is complete or the buffer is complete */
2755 if (h2s->st != H2_SS_IDLE) {
Willy Tarreau88d138e2019-01-02 19:38:14 +01002756 /* The stream exists/existed, this must be a trailers frame */
2757 if (h2s->st != H2_SS_CLOSED) {
Amaury Denoyelle74162742020-12-11 17:53:05 +01002758 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &body_len, NULL);
Willy Tarreauaab1a602019-05-06 11:12:18 +02002759 /* unrecoverable error ? */
Willy Tarreau8c05c692023-01-19 23:58:11 +01002760 if (h2c->st0 >= H2_CS_ERROR) {
2761 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 Tarreauaab1a602019-05-06 11:12:18 +02002762 goto out;
Willy Tarreau8c05c692023-01-19 23:58:11 +01002763 }
Willy Tarreauaab1a602019-05-06 11:12:18 +02002764
Christopher Faulet0de3f552021-10-08 08:56:00 +02002765 if (error == 0) {
2766 /* Demux not blocked because of the stream, it is an incomplete frame */
2767 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2768 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002769 goto out; // missing data
Christopher Faulet0de3f552021-10-08 08:56:00 +02002770 }
Willy Tarreauaab1a602019-05-06 11:12:18 +02002771
2772 if (error < 0) {
2773 /* Failed to decode this frame (e.g. too large request)
2774 * but the HPACK decompressor is still synchronized.
2775 */
2776 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
Willy Tarreau8c05c692023-01-19 23:58:11 +01002777 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 +02002778 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau88d138e2019-01-02 19:38:14 +01002779 goto out;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002780 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01002781 goto done;
2782 }
Willy Tarreau1f035502019-01-30 11:44:07 +01002783 /* the connection was already killed by an RST, let's consume
2784 * the data and send another RST.
2785 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01002786 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Willy Tarreau1f035502019-01-30 11:44:07 +01002787 h2s = (struct h2s*)h2_error_stream;
2788 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002789 }
2790 else if (h2c->dsi <= h2c->max_id || !(h2c->dsi & 1)) {
2791 /* RFC7540#5.1.1 stream id > prev ones, and must be odd here */
2792 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002793 TRACE_ERROR("HEADERS on invalid stream ID", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau4781b152021-04-06 13:53:36 +02002794 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau22de8d32018-09-05 19:55:58 +02002795 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02002796 goto conn_err;
2797 }
Willy Tarreau415b1ee2019-01-02 13:59:43 +01002798 else if (h2c->flags & H2_CF_DEM_TOOMANY)
2799 goto out; // IDLE but too many cs still present
Willy Tarreau13278b42017-10-13 19:23:14 +02002800
Amaury Denoyelle74162742020-12-11 17:53:05 +01002801 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002802
Willy Tarreau25919232019-01-03 14:48:18 +01002803 /* unrecoverable error ? */
Willy Tarreau8c05c692023-01-19 23:58:11 +01002804 if (h2c->st0 >= H2_CS_ERROR) {
2805 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 Tarreau5c8cafa2018-12-23 11:30:42 +01002806 goto out;
Willy Tarreau8c05c692023-01-19 23:58:11 +01002807 }
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002808
Willy Tarreau25919232019-01-03 14:48:18 +01002809 if (error <= 0) {
Christopher Faulet0de3f552021-10-08 08:56:00 +02002810 if (error == 0) {
2811 /* Demux not blocked because of the stream, it is an incomplete frame */
2812 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2813 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau25919232019-01-03 14:48:18 +01002814 goto out; // missing data
Christopher Faulet0de3f552021-10-08 08:56:00 +02002815 }
Willy Tarreau25919232019-01-03 14:48:18 +01002816
2817 /* Failed to decode this stream (e.g. too large request)
2818 * but the HPACK decompressor is still synchronized.
2819 */
2820 h2s = (struct h2s*)h2_error_stream;
2821 goto send_rst;
2822 }
2823
Willy Tarreau3c10d512021-06-17 08:29:14 +02002824 TRACE_USER("rcvd H2 request ", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW, h2c->conn, 0, &rxbuf);
2825
Willy Tarreauca45e442022-05-12 09:08:51 +02002826 /* Now we cannot roll back and we won't come back here anymore for this
2827 * stream, this stream ID is open.
2828 */
2829 if (h2c->dsi > h2c->max_id)
2830 h2c->max_id = h2c->dsi;
2831
Willy Tarreau22de8d32018-09-05 19:55:58 +02002832 /* Note: we don't emit any other logs below because ff we return
Willy Tarreaua8e49542018-10-03 18:53:55 +02002833 * positively from h2c_frt_stream_new(), the stream will report the error,
2834 * and if we return in error, h2c_frt_stream_new() will emit the error.
Christopher Faulet7d013e72020-12-15 16:56:50 +01002835 *
2836 * Xfer the rxbuf to the stream. On success, the new stream owns the
2837 * rxbuf. On error, it is released here.
Willy Tarreau22de8d32018-09-05 19:55:58 +02002838 */
Amaury Denoyelleee7fcd52021-10-18 14:45:49 +02002839 h2s = h2c_frt_stream_new(h2c, h2c->dsi, &rxbuf, flags);
Willy Tarreau13278b42017-10-13 19:23:14 +02002840 if (!h2s) {
Willy Tarreau96a10c22018-12-23 18:30:44 +01002841 h2s = (struct h2s*)h2_refused_stream;
2842 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002843 }
2844
2845 h2s->st = H2_SS_OPEN;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002846 h2s->flags |= flags;
Willy Tarreau1915ca22019-01-24 11:49:37 +01002847 h2s->body_len = body_len;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002848
Willy Tarreau88d138e2019-01-02 19:38:14 +01002849 done:
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002850 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau13278b42017-10-13 19:23:14 +02002851 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002852
2853 if (h2s->flags & H2_SF_ES_RCVD) {
Willy Tarreaufc10f592019-01-30 19:28:32 +01002854 if (h2s->st == H2_SS_OPEN)
2855 h2s->st = H2_SS_HREM;
2856 else
2857 h2s_close(h2s);
Willy Tarreau13278b42017-10-13 19:23:14 +02002858 }
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002859 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002860
2861 conn_err:
2862 h2c_error(h2c, error);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002863 goto out;
Willy Tarreau13278b42017-10-13 19:23:14 +02002864
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002865 out:
2866 h2_release_buf(h2c, &rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002867 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 +01002868 return NULL;
Willy Tarreau96a10c22018-12-23 18:30:44 +01002869
2870 send_rst:
2871 /* make the demux send an RST for the current stream. We may only
2872 * do this if we're certain that the HEADERS frame was properly
2873 * decompressed so that the HPACK decoder is still kept up to date.
2874 */
2875 h2_release_buf(h2c, &rxbuf);
2876 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002877
Willy Tarreau022e5e52020-09-10 09:33:15 +02002878 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 +02002879 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau96a10c22018-12-23 18:30:44 +01002880 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002881}
2882
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002883/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2884 * It may return an error in h2c or h2s. Described in RFC7540#6.2. Most of the
2885 * errors here are reported as connection errors since it's impossible to
2886 * recover from such errors after the compression context has been altered.
2887 */
2888static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
2889{
Christopher Faulet6884aa32019-09-23 15:28:20 +02002890 struct buffer rxbuf = BUF_NULL;
2891 unsigned long long body_len = 0;
2892 uint32_t flags = 0;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002893 int error;
2894
Willy Tarreau7838a792019-08-12 18:42:03 +02002895 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2896
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002897 if (!b_size(&h2c->dbuf)) {
2898 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002899 goto fail; // empty buffer
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002900 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002901
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002902 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2903 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002904 goto fail; // incomplete frame
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02002905 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002906
Christopher Faulet6884aa32019-09-23 15:28:20 +02002907 if (h2s->st != H2_SS_CLOSED) {
Amaury Denoyelle74162742020-12-11 17:53:05 +01002908 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &h2s->body_len, h2s->upgrade_protocol);
Christopher Faulet6884aa32019-09-23 15:28:20 +02002909 }
2910 else {
2911 /* the connection was already killed by an RST, let's consume
2912 * the data and send another RST.
2913 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01002914 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len, NULL);
Christopher Fauletea7a7782019-09-26 16:19:13 +02002915 h2s = (struct h2s*)h2_error_stream;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002916 h2c->st0 = H2_CS_FRAME_E;
2917 goto send_rst;
2918 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002919
Willy Tarreau25919232019-01-03 14:48:18 +01002920 /* unrecoverable error ? */
Willy Tarreau8c05c692023-01-19 23:58:11 +01002921 if (h2c->st0 >= H2_CS_ERROR) {
2922 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 +02002923 goto fail;
Willy Tarreau8c05c692023-01-19 23:58:11 +01002924 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002925
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002926 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2927 /* RFC7540#5.1 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002928 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 +01002929 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2930 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau4781b152021-04-06 13:53:36 +02002931 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002932 goto fail;
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002933 }
2934
Willy Tarreau25919232019-01-03 14:48:18 +01002935 if (error <= 0) {
Christopher Faulet0de3f552021-10-08 08:56:00 +02002936 if (error == 0) {
2937 /* Demux not blocked because of the stream, it is an incomplete frame */
2938 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2939 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002940 goto fail; // missing data
Christopher Faulet0de3f552021-10-08 08:56:00 +02002941 }
Willy Tarreau25919232019-01-03 14:48:18 +01002942
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002943 /* stream error : send RST_STREAM */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002944 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 +01002945 h2s_error(h2s, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002946 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau4781b152021-04-06 13:53:36 +02002947 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002948 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002949 }
2950
Christopher Fauletfa922f02019-05-07 10:55:17 +02002951 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002952 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002953
Willy Tarreau927b88b2019-03-04 08:03:25 +01002954 if (h2s->cs && h2s->cs->flags & CS_FL_ERROR && h2s->st < H2_SS_ERROR)
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002955 h2s->st = H2_SS_ERROR;
Christopher Fauletfa922f02019-05-07 10:55:17 +02002956 else if (h2s->flags & H2_SF_ES_RCVD) {
2957 if (h2s->st == H2_SS_OPEN)
2958 h2s->st = H2_SS_HREM;
2959 else if (h2s->st == H2_SS_HLOC)
2960 h2s_close(h2s);
2961 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002962
Christopher Fauletf95f8762021-01-22 11:59:07 +01002963 /* Unblock busy server h2s waiting for the response headers to validate
2964 * the tunnel establishment or the end of the response of an oborted
2965 * tunnel
2966 */
2967 if ((h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY)) == (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY) ||
2968 (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)) {
2969 TRACE_STATE("Unblock h2s blocked on tunnel establishment/abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2970 h2s->flags &= ~H2_SF_BLK_MBUSY;
2971 }
2972
Willy Tarreaucbd37e02021-06-16 18:32:42 +02002973 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 +02002974 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002975 return h2s;
Willy Tarreau7838a792019-08-12 18:42:03 +02002976 fail:
2977 TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2978 return NULL;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002979
2980 send_rst:
2981 /* make the demux send an RST for the current stream. We may only
2982 * do this if we're certain that the HEADERS frame was properly
2983 * decompressed so that the HPACK decoder is still kept up to date.
2984 */
2985 h2_release_buf(h2c, &rxbuf);
2986 h2c->st0 = H2_CS_FRAME_E;
2987
Willy Tarreau022e5e52020-09-10 09:33:15 +02002988 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 +02002989 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2990 return h2s;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002991}
2992
Willy Tarreau454f9052017-10-26 19:40:35 +02002993/* processes a DATA frame. Returns > 0 on success or zero on missing data.
2994 * It may return an error in h2c or h2s. Described in RFC7540#6.1.
2995 */
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01002996static int h2c_handle_data(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02002997{
2998 int error;
2999
Willy Tarreau7838a792019-08-12 18:42:03 +02003000 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
3001
Willy Tarreau454f9052017-10-26 19:40:35 +02003002 /* note that empty DATA frames are perfectly valid and sometimes used
3003 * to signal an end of stream (with the ES flag).
3004 */
3005
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003006 if (!b_size(&h2c->dbuf) && h2c->dfl) {
3007 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02003008 goto fail; // empty buffer
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003009 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003010
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003011 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
3012 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02003013 goto fail; // incomplete frame
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003014 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003015
3016 /* now either the frame is complete or the buffer is complete */
3017
Willy Tarreau454f9052017-10-26 19:40:35 +02003018 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
3019 /* RFC7540#6.1 */
3020 error = H2_ERR_STREAM_CLOSED;
3021 goto strm_err;
3022 }
3023
Christopher Faulet4f09ec82019-06-19 09:25:58 +02003024 if ((h2s->flags & H2_SF_DATA_CLEN) && (h2c->dfl - h2c->dpl) > h2s->body_len) {
Willy Tarreau1915ca22019-01-24 11:49:37 +01003025 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003026 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 +01003027 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02003028 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau1915ca22019-01-24 11:49:37 +01003029 goto strm_err;
3030 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01003031 if (!(h2c->flags & H2_CF_IS_BACK) &&
3032 (h2s->flags & (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT)) == (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT) &&
3033 ((h2c->dfl - h2c->dpl) || !(h2c->dff & H2_F_DATA_END_STREAM))) {
3034 /* a tunnel attempt was aborted but the client still try to send some raw data.
3035 * Thus the stream is closed with the CANCEL error. Here we take care it is not
3036 * an empty DATA Frame with the ES flag. The error is only handled if ES was
3037 * already sent to the client because depending on the scheduling, these data may
Ilya Shipitsinacf84592021-02-06 22:29:08 +05003038 * have been sent before the server response but not handle here.
Christopher Faulet91b21dc2021-01-22 12:13:15 +01003039 */
3040 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
3041 error = H2_ERR_CANCEL;
3042 goto strm_err;
3043 }
Willy Tarreau1915ca22019-01-24 11:49:37 +01003044
Willy Tarreaua56a6de2018-02-26 15:59:07 +01003045 if (!h2_frt_transfer_data(h2s))
Willy Tarreau7838a792019-08-12 18:42:03 +02003046 goto fail;
Willy Tarreaua56a6de2018-02-26 15:59:07 +01003047
Willy Tarreau454f9052017-10-26 19:40:35 +02003048 /* call the upper layers to process the frame, then let the upper layer
3049 * notify the stream about any change.
3050 */
3051 if (!h2s->cs) {
Willy Tarreau082c4572019-08-06 10:11:02 +02003052 /* The upper layer has already closed, this may happen on
3053 * 4xx/redirects during POST, or when receiving a response
3054 * from an H2 server after the client has aborted.
3055 */
3056 error = H2_ERR_CANCEL;
Willy Tarreau454f9052017-10-26 19:40:35 +02003057 goto strm_err;
3058 }
3059
Willy Tarreau8f650c32017-11-21 19:36:21 +01003060 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02003061 goto fail;
Willy Tarreau8f650c32017-11-21 19:36:21 +01003062
Willy Tarreau721c9742017-11-07 11:05:42 +01003063 if (h2s->st >= H2_SS_ERROR) {
Willy Tarreau454f9052017-10-26 19:40:35 +02003064 /* stream error : send RST_STREAM */
Willy Tarreaua20a5192017-12-27 11:02:06 +01003065 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02003066 }
3067
3068 /* check for completion : the callee will change this to FRAME_A or
3069 * FRAME_H once done.
3070 */
3071 if (h2c->st0 == H2_CS_FRAME_P)
Willy Tarreau7838a792019-08-12 18:42:03 +02003072 goto fail;
Willy Tarreau454f9052017-10-26 19:40:35 +02003073
Willy Tarreauc4134ba2017-12-11 18:45:08 +01003074 /* last frame */
3075 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02003076 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreaufc10f592019-01-30 19:28:32 +01003077 if (h2s->st == H2_SS_OPEN)
3078 h2s->st = H2_SS_HREM;
3079 else
3080 h2s_close(h2s);
3081
Willy Tarreau1915ca22019-01-24 11:49:37 +01003082 if (h2s->flags & H2_SF_DATA_CLEN && h2s->body_len) {
3083 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003084 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 +01003085 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02003086 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau1915ca22019-01-24 11:49:37 +01003087 goto strm_err;
3088 }
Willy Tarreauc4134ba2017-12-11 18:45:08 +01003089 }
3090
Christopher Fauletf95f8762021-01-22 11:59:07 +01003091 /* Unblock busy server h2s waiting for the end of the response for an
3092 * aborted tunnel
3093 */
3094 if ((h2c->flags & H2_CF_IS_BACK) &&
3095 (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)) {
3096 TRACE_STATE("Unblock h2s blocked on tunnel abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
3097 h2s->flags &= ~H2_SF_BLK_MBUSY;
3098 }
3099
Willy Tarreau7838a792019-08-12 18:42:03 +02003100 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02003101 return 1;
3102
Willy Tarreau454f9052017-10-26 19:40:35 +02003103 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01003104 h2s_error(h2s, error);
3105 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003106 fail:
3107 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 +02003108 return 0;
3109}
3110
Willy Tarreau63864812019-08-07 14:25:20 +02003111/* check that the current frame described in h2c->{dsi,dft,dfl,dff,...} is
3112 * valid for the current stream state. This is needed only after parsing the
3113 * frame header but in practice it can be performed at any time during
3114 * H2_CS_FRAME_P since no state transition happens there. Returns >0 on success
3115 * or 0 in case of error, in which case either h2s or h2c will carry an error.
3116 */
3117static int h2_frame_check_vs_state(struct h2c *h2c, struct h2s *h2s)
3118{
Willy Tarreau7838a792019-08-12 18:42:03 +02003119 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
3120
Willy Tarreau63864812019-08-07 14:25:20 +02003121 if (h2s->st == H2_SS_IDLE &&
3122 h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) {
3123 /* RFC7540#5.1: any frame other than HEADERS or PRIORITY in
3124 * this state MUST be treated as a connection error
3125 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003126 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 +02003127 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003128 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau63864812019-08-07 14:25:20 +02003129 /* only log if no other stream can report the error */
3130 sess_log(h2c->conn->owner);
3131 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003132 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02003133 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 +02003134 return 0;
3135 }
3136
Willy Tarreau57a18162019-11-24 14:57:53 +01003137 if (h2s->st == H2_SS_IDLE && (h2c->flags & H2_CF_IS_BACK)) {
3138 /* only PUSH_PROMISE would be permitted here */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003139 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 +01003140 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02003141 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau57a18162019-11-24 14:57:53 +01003142 TRACE_DEVEL("leaving in error (idle&back)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s);
3143 return 0;
3144 }
3145
Willy Tarreau63864812019-08-07 14:25:20 +02003146 if (h2s->st == H2_SS_HREM && h2c->dft != H2_FT_WINDOW_UPDATE &&
3147 h2c->dft != H2_FT_RST_STREAM && h2c->dft != H2_FT_PRIORITY) {
3148 /* RFC7540#5.1: any frame other than WU/PRIO/RST in
3149 * this state MUST be treated as a stream error.
3150 * 6.2, 6.6 and 6.10 further mandate that HEADERS/
3151 * PUSH_PROMISE/CONTINUATION cause connection errors.
3152 */
Amaury Denoyellea8879232020-10-27 17:16:03 +01003153 if (h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003154 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 +02003155 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02003156 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Amaury Denoyellea8879232020-10-27 17:16:03 +01003157 }
3158 else {
Willy Tarreau63864812019-08-07 14:25:20 +02003159 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
Amaury Denoyellea8879232020-10-27 17:16:03 +01003160 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003161 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 +02003162 return 0;
3163 }
3164
3165 /* Below the management of frames received in closed state is a
3166 * bit hackish because the spec makes strong differences between
3167 * streams closed by receiving RST, sending RST, and seeing ES
3168 * in both directions. In addition to this, the creation of a
3169 * new stream reusing the identifier of a closed one will be
3170 * detected here. Given that we cannot keep track of all closed
3171 * streams forever, we consider that unknown closed streams were
3172 * closed on RST received, which allows us to respond with an
3173 * RST without breaking the connection (eg: to abort a transfer).
3174 * Some frames have to be silently ignored as well.
3175 */
3176 if (h2s->st == H2_SS_CLOSED && h2c->dsi) {
3177 if (!(h2c->flags & H2_CF_IS_BACK) && h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
3178 /* #5.1.1: The identifier of a newly
3179 * established stream MUST be numerically
3180 * greater than all streams that the initiating
3181 * endpoint has opened or reserved. This
3182 * governs streams that are opened using a
3183 * HEADERS frame and streams that are reserved
3184 * using PUSH_PROMISE. An endpoint that
3185 * receives an unexpected stream identifier
3186 * MUST respond with a connection error.
3187 */
3188 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003189 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 +02003190 return 0;
3191 }
3192
Willy Tarreau4c08f122019-09-26 08:47:15 +02003193 if (h2s->flags & H2_SF_RST_RCVD &&
3194 !(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 +02003195 /* RFC7540#5.1:closed: an endpoint that
3196 * receives any frame other than PRIORITY after
3197 * receiving a RST_STREAM MUST treat that as a
3198 * stream error of type STREAM_CLOSED.
3199 *
3200 * Note that old streams fall into this category
3201 * and will lead to an RST being sent.
3202 *
3203 * However, we cannot generalize this to all frame types. Those
3204 * carrying compression state must still be processed before
3205 * being dropped or we'll desynchronize the decoder. This can
3206 * happen with request trailers received after sending an
3207 * RST_STREAM, or with header/trailers responses received after
3208 * sending RST_STREAM (aborted stream).
Willy Tarreau4c08f122019-09-26 08:47:15 +02003209 *
3210 * In addition, since our CLOSED streams always carry the
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003211 * RST_RCVD bit, we don't want to accidentally catch valid
Willy Tarreau4c08f122019-09-26 08:47:15 +02003212 * frames for a closed stream, i.e. RST/PRIO/WU.
Willy Tarreau63864812019-08-07 14:25:20 +02003213 */
3214 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
3215 h2c->st0 = H2_CS_FRAME_E;
Christopher Faulet6884aa32019-09-23 15:28:20 +02003216 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 +02003217 return 0;
3218 }
3219
3220 /* RFC7540#5.1:closed: if this state is reached as a
3221 * result of sending a RST_STREAM frame, the peer that
3222 * receives the RST_STREAM might have already sent
3223 * frames on the stream that cannot be withdrawn. An
3224 * endpoint MUST ignore frames that it receives on
3225 * closed streams after it has sent a RST_STREAM
3226 * frame. An endpoint MAY choose to limit the period
3227 * over which it ignores frames and treat frames that
3228 * arrive after this time as being in error.
3229 */
3230 if (h2s->id && !(h2s->flags & H2_SF_RST_SENT)) {
3231 /* RFC7540#5.1:closed: any frame other than
3232 * PRIO/WU/RST in this state MUST be treated as
3233 * a connection error
3234 */
3235 if (h2c->dft != H2_FT_RST_STREAM &&
3236 h2c->dft != H2_FT_PRIORITY &&
3237 h2c->dft != H2_FT_WINDOW_UPDATE) {
3238 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003239 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 +02003240 return 0;
3241 }
3242 }
3243 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003244 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02003245 return 1;
3246}
3247
Willy Tarreaubc933932017-10-09 16:21:43 +02003248/* process Rx frames to be demultiplexed */
3249static void h2_process_demux(struct h2c *h2c)
3250{
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003251 struct h2s *h2s = NULL, *tmp_h2s;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003252 struct h2_fh hdr;
3253 unsigned int padlen = 0;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003254 int32_t old_iw = h2c->miw;
Willy Tarreauf3ee0692017-10-17 08:18:25 +02003255
Willy Tarreau7838a792019-08-12 18:42:03 +02003256 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3257
Willy Tarreau081d4722017-05-16 21:51:05 +02003258 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02003259 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02003260
3261 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3262 if (h2c->st0 == H2_CS_PREFACE) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003263 TRACE_STATE("expecting preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02003264 if (h2c->flags & H2_CF_IS_BACK)
Willy Tarreau7838a792019-08-12 18:42:03 +02003265 goto out;
3266
Willy Tarreau52eed752017-09-22 15:05:09 +02003267 if (unlikely(h2c_frt_recv_preface(h2c) <= 0)) {
3268 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02003269 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003270 TRACE_PROTO("failed to receive preface", H2_EV_RX_PREFACE|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003271 h2c->st0 = H2_CS_ERROR2;
Willy Tarreauc23d6d12021-06-17 08:08:48 +02003272 if (b_data(&h2c->dbuf) ||
Christopher Faulet79b347d2021-07-26 10:18:35 +02003273 !(((const struct session *)h2c->conn->owner)->fe->options & (PR_O_NULLNOLOG|PR_O_IGNORE_PRB)))
Willy Tarreauc23d6d12021-06-17 08:08:48 +02003274 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02003275 }
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003276 goto done;
Willy Tarreau52eed752017-09-22 15:05:09 +02003277 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003278 TRACE_PROTO("received preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003279
3280 h2c->max_id = 0;
3281 h2c->st0 = H2_CS_SETTINGS1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003282 TRACE_STATE("switching to SETTINGS1", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003283 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003284
3285 if (h2c->st0 == H2_CS_SETTINGS1) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003286 /* ensure that what is pending is a valid SETTINGS frame
3287 * without an ACK.
3288 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003289 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 +02003290 if (!h2_get_frame_hdr(&h2c->dbuf, &hdr)) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003291 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003292 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau22de8d32018-09-05 19:55:58 +02003293 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003294 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 +02003295 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003296 if (!(h2c->flags & H2_CF_IS_BACK))
3297 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02003298 }
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003299 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003300 }
3301
3302 if (hdr.sid || hdr.ft != H2_FT_SETTINGS || hdr.ff & H2_F_SETTINGS_ACK) {
3303 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003304 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 +02003305 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
3306 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003307 if (!(h2c->flags & H2_CF_IS_BACK))
3308 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003309 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003310 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003311 }
3312
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003313 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003314 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003315 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 +02003316 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
3317 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003318 if (!(h2c->flags & H2_CF_IS_BACK))
3319 sess_log(h2c->conn->owner);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003320 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003321 }
3322
Willy Tarreau3bf69182018-12-21 15:34:50 +01003323 /* that's OK, switch to FRAME_P to process it. This is
3324 * a SETTINGS frame whose header has already been
3325 * deleted above.
3326 */
Willy Tarreau54f46e52019-01-30 15:11:03 +01003327 padlen = 0;
Willy Tarreau4781b152021-04-06 13:53:36 +02003328 HA_ATOMIC_INC(&h2c->px_counters->settings_rcvd);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003329 goto new_frame;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003330 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003331 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003332
3333 /* process as many incoming frames as possible below */
Willy Tarreau7838a792019-08-12 18:42:03 +02003334 while (1) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02003335 int ret = 0;
3336
Willy Tarreau7838a792019-08-12 18:42:03 +02003337 if (!b_data(&h2c->dbuf)) {
3338 TRACE_DEVEL("no more Rx data", H2_EV_RX_FRAME, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003339 h2c->flags |= H2_CF_DEM_SHORT_READ;
3340 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003341 }
3342
3343 if (h2c->st0 >= H2_CS_ERROR) {
3344 TRACE_STATE("end of connection reported", H2_EV_RX_FRAME|H2_EV_RX_EOI, h2c->conn);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003345 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003346 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003347
3348 if (h2c->st0 == H2_CS_FRAME_H) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003349 TRACE_STATE("expecting H2 frame header", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003350 if (!h2_peek_frame_hdr(&h2c->dbuf, 0, &hdr)) {
3351 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003352 break;
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003353 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003354
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003355 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003356 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 +02003357 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003358 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02003359 /* only log if no other stream can report the error */
3360 sess_log(h2c->conn->owner);
3361 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003362 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003363 break;
3364 }
3365
Willy Tarreau1d7138e2022-06-08 16:32:22 +02003366 if (h2c->rcvd_s && h2c->dsi != hdr.sid) {
3367 /* changed stream with a pending WU, need to
3368 * send it now.
3369 */
3370 TRACE_PROTO("sending stream WINDOW_UPDATE frame on stream switch", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
3371 ret = h2c_send_strm_wu(h2c);
3372 if (ret <= 0)
3373 break;
3374 }
3375
Christopher Fauletdd2a5622019-06-18 12:22:38 +02003376 padlen = 0;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003377 if (h2_ft_bit(hdr.ft) & H2_FT_PADDED_MASK && hdr.ff & H2_F_PADDED) {
3378 /* If the frame is padded (HEADERS, PUSH_PROMISE or DATA),
3379 * we read the pad length and drop it from the remaining
3380 * payload (one byte + the 9 remaining ones = 10 total
3381 * removed), so we have a frame payload starting after the
3382 * pad len. Flow controlled frames (DATA) also count the
3383 * padlen in the flow control, so it must be adjusted.
3384 */
3385 if (hdr.len < 1) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003386 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 +01003387 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003388 if (!(h2c->flags & H2_CF_IS_BACK))
3389 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003390 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003391 goto done;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003392 }
3393 hdr.len--;
3394
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003395 if (b_data(&h2c->dbuf) < 10) {
3396 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003397 break; // missing padlen
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003398 }
Willy Tarreau3bf69182018-12-21 15:34:50 +01003399
3400 padlen = *(uint8_t *)b_peek(&h2c->dbuf, 9);
3401
3402 if (padlen > hdr.len) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003403 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 +01003404 /* RFC7540#6.1 : pad length = length of
3405 * frame payload or greater => error.
3406 */
3407 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003408 if (!(h2c->flags & H2_CF_IS_BACK))
3409 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003410 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003411 goto done;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003412 }
3413
3414 if (h2_ft_bit(hdr.ft) & H2_FT_FC_MASK) {
3415 h2c->rcvd_c++;
3416 h2c->rcvd_s++;
3417 }
3418 b_del(&h2c->dbuf, 1);
3419 }
3420 h2_skip_frame_hdr(&h2c->dbuf);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003421
3422 new_frame:
Willy Tarreau7e98c052017-10-10 15:56:59 +02003423 h2c->dfl = hdr.len;
3424 h2c->dsi = hdr.sid;
3425 h2c->dft = hdr.ft;
3426 h2c->dff = hdr.ff;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003427 h2c->dpl = padlen;
Willy Tarreau6c3eeca2022-08-18 11:19:57 +02003428 h2c->flags |= H2_CF_DEM_IN_PROGRESS;
Willy Tarreau73db4342019-09-25 07:28:44 +02003429 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 +02003430 h2c->st0 = H2_CS_FRAME_P;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003431
3432 /* check for minimum basic frame format validity */
3433 ret = h2_frame_check(h2c->dft, 1, h2c->dsi, h2c->dfl, global.tune.bufsize);
3434 if (ret != H2_ERR_NO_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003435 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 +01003436 h2c_error(h2c, ret);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003437 if (!(h2c->flags & H2_CF_IS_BACK))
3438 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003439 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003440 goto done;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003441 }
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01003442
3443 /* transition to HEADERS frame ends the keep-alive idle
3444 * timer and starts the http-request idle delay.
3445 */
3446 if (hdr.ft == H2_FT_HEADERS)
3447 h2c->idle_start = now_ms;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003448 }
3449
Willy Tarreau9fd5aa82019-08-06 15:21:45 +02003450 /* Only H2_CS_FRAME_P, H2_CS_FRAME_A and H2_CS_FRAME_E here.
3451 * H2_CS_FRAME_P indicates an incomplete previous operation
3452 * (most often the first attempt) and requires some validity
3453 * checks for the frame and the current state. The two other
3454 * ones are set after completion (or abortion) and must skip
3455 * validity checks.
3456 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003457 tmp_h2s = h2c_st_by_id(h2c, h2c->dsi);
3458
Willy Tarreau567beb82018-12-18 16:52:44 +01003459 if (tmp_h2s != h2s && h2s && h2s->cs &&
3460 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003461 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003462 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003463 (h2s->flags & H2_SF_ES_RCVD) ||
3464 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003465 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003466 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 +01003467 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003468 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003469 }
3470 h2s = tmp_h2s;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003471
Willy Tarreau63864812019-08-07 14:25:20 +02003472 if (h2c->st0 == H2_CS_FRAME_E ||
Willy Tarreau7838a792019-08-12 18:42:03 +02003473 (h2c->st0 == H2_CS_FRAME_P && !h2_frame_check_vs_state(h2c, h2s))) {
3474 TRACE_PROTO("stream error reported", H2_EV_RX_FRAME|H2_EV_PROTO_ERR, h2c->conn, h2s);
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003475 goto strm_err;
Willy Tarreau7838a792019-08-12 18:42:03 +02003476 }
Willy Tarreauc0da1962017-10-30 18:38:00 +01003477
Willy Tarreau7e98c052017-10-10 15:56:59 +02003478 switch (h2c->dft) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02003479 case H2_FT_SETTINGS:
Willy Tarreau7838a792019-08-12 18:42:03 +02003480 if (h2c->st0 == H2_CS_FRAME_P) {
3481 TRACE_PROTO("receiving H2 SETTINGS frame", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn, h2s);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003482 ret = h2c_handle_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003483 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003484 HA_ATOMIC_INC(&h2c->px_counters->settings_rcvd);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003485
Willy Tarreau7838a792019-08-12 18:42:03 +02003486 if (h2c->st0 == H2_CS_FRAME_A) {
3487 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 +02003488 ret = h2c_ack_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003489 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003490 break;
3491
Willy Tarreaucf68c782017-10-10 17:11:41 +02003492 case H2_FT_PING:
Willy Tarreau7838a792019-08-12 18:42:03 +02003493 if (h2c->st0 == H2_CS_FRAME_P) {
3494 TRACE_PROTO("receiving H2 PING frame", H2_EV_RX_FRAME|H2_EV_RX_PING, h2c->conn, h2s);
Willy Tarreaucf68c782017-10-10 17:11:41 +02003495 ret = h2c_handle_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003496 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003497
Willy Tarreau7838a792019-08-12 18:42:03 +02003498 if (h2c->st0 == H2_CS_FRAME_A) {
3499 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 +02003500 ret = h2c_ack_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003501 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003502 break;
3503
Willy Tarreau26f95952017-07-27 17:18:30 +02003504 case H2_FT_WINDOW_UPDATE:
Willy Tarreau7838a792019-08-12 18:42:03 +02003505 if (h2c->st0 == H2_CS_FRAME_P) {
3506 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 +02003507 ret = h2c_handle_window_update(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003508 }
Willy Tarreau26f95952017-07-27 17:18:30 +02003509 break;
3510
Willy Tarreau61290ec2017-10-17 08:19:21 +02003511 case H2_FT_CONTINUATION:
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003512 /* RFC7540#6.10: CONTINUATION may only be preceded by
Willy Tarreauea18f862018-12-22 20:19:26 +01003513 * a HEADERS/PUSH_PROMISE/CONTINUATION frame. These
3514 * frames' parsers consume all following CONTINUATION
3515 * frames so this one is out of sequence.
Willy Tarreau61290ec2017-10-17 08:19:21 +02003516 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003517 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 +01003518 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003519 if (!(h2c->flags & H2_CF_IS_BACK))
3520 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003521 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003522 goto done;
Willy Tarreau61290ec2017-10-17 08:19:21 +02003523
Willy Tarreau13278b42017-10-13 19:23:14 +02003524 case H2_FT_HEADERS:
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003525 if (h2c->st0 == H2_CS_FRAME_P) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003526 TRACE_PROTO("receiving H2 HEADERS frame", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02003527 if (h2c->flags & H2_CF_IS_BACK)
3528 tmp_h2s = h2c_bck_handle_headers(h2c, h2s);
3529 else
3530 tmp_h2s = h2c_frt_handle_headers(h2c, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003531 if (tmp_h2s) {
3532 h2s = tmp_h2s;
3533 ret = 1;
3534 }
3535 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003536 HA_ATOMIC_INC(&h2c->px_counters->headers_rcvd);
Willy Tarreau13278b42017-10-13 19:23:14 +02003537 break;
3538
Willy Tarreau454f9052017-10-26 19:40:35 +02003539 case H2_FT_DATA:
Willy Tarreau7838a792019-08-12 18:42:03 +02003540 if (h2c->st0 == H2_CS_FRAME_P) {
3541 TRACE_PROTO("receiving H2 DATA frame", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01003542 ret = h2c_handle_data(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003543 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003544 HA_ATOMIC_INC(&h2c->px_counters->data_rcvd);
Willy Tarreau454f9052017-10-26 19:40:35 +02003545
Willy Tarreau7838a792019-08-12 18:42:03 +02003546 if (h2c->st0 == H2_CS_FRAME_A) {
Willy Tarreau1d7138e2022-06-08 16:32:22 +02003547 /* rcvd_s will suffice to trigger the sending of a WU */
3548 h2c->st0 = H2_CS_FRAME_H;
Willy Tarreau7838a792019-08-12 18:42:03 +02003549 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003550 break;
Willy Tarreaucd234e92017-08-18 10:59:39 +02003551
Willy Tarreau92153fc2017-12-03 19:46:19 +01003552 case H2_FT_PRIORITY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003553 if (h2c->st0 == H2_CS_FRAME_P) {
3554 TRACE_PROTO("receiving H2 PRIORITY frame", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn, h2s);
Willy Tarreau92153fc2017-12-03 19:46:19 +01003555 ret = h2c_handle_priority(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003556 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01003557 break;
3558
Willy Tarreaucd234e92017-08-18 10:59:39 +02003559 case H2_FT_RST_STREAM:
Willy Tarreau7838a792019-08-12 18:42:03 +02003560 if (h2c->st0 == H2_CS_FRAME_P) {
3561 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 +02003562 ret = h2c_handle_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003563 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003564 HA_ATOMIC_INC(&h2c->px_counters->rst_stream_rcvd);
Willy Tarreaucd234e92017-08-18 10:59:39 +02003565 break;
3566
Willy Tarreaue96b0922017-10-30 00:28:29 +01003567 case H2_FT_GOAWAY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003568 if (h2c->st0 == H2_CS_FRAME_P) {
3569 TRACE_PROTO("receiving H2 GOAWAY frame", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn, h2s);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003570 ret = h2c_handle_goaway(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003571 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003572 HA_ATOMIC_INC(&h2c->px_counters->goaway_rcvd);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003573 break;
3574
Willy Tarreau1c661982017-10-30 13:52:01 +01003575 /* implement all extra frame types here */
Willy Tarreau7e98c052017-10-10 15:56:59 +02003576 default:
Willy Tarreau7838a792019-08-12 18:42:03 +02003577 TRACE_PROTO("receiving H2 ignored frame", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003578 /* drop frames that we ignore. They may be larger than
3579 * the buffer so we drain all of their contents until
3580 * we reach the end.
3581 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003582 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3583 b_del(&h2c->dbuf, ret);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003584 h2c->dfl -= ret;
3585 ret = h2c->dfl == 0;
3586 }
3587
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003588 strm_err:
Willy Tarreaua20a5192017-12-27 11:02:06 +01003589 /* We may have to send an RST if not done yet */
Willy Tarreau7838a792019-08-12 18:42:03 +02003590 if (h2s->st == H2_SS_ERROR) {
3591 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 +01003592 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003593 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003594
Willy Tarreau7838a792019-08-12 18:42:03 +02003595 if (h2c->st0 == H2_CS_FRAME_E) {
3596 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 +01003597 ret = h2c_send_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003598 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003599
Willy Tarreau7e98c052017-10-10 15:56:59 +02003600 /* error or missing data condition met above ? */
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003601 if (ret <= 0)
Willy Tarreau7e98c052017-10-10 15:56:59 +02003602 break;
3603
3604 if (h2c->st0 != H2_CS_FRAME_H) {
Willy Tarreaubba7a4d2020-09-18 07:41:28 +02003605 if (h2c->dfl)
3606 TRACE_DEVEL("skipping remaining frame payload", H2_EV_RX_FRAME, h2c->conn, h2s);
Christopher Faulet5112a602019-09-26 16:38:28 +02003607 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3608 b_del(&h2c->dbuf, ret);
3609 h2c->dfl -= ret;
3610 if (!h2c->dfl) {
Willy Tarreau6c3eeca2022-08-18 11:19:57 +02003611 h2c->flags &= ~H2_CF_DEM_IN_PROGRESS;
Christopher Faulet5112a602019-09-26 16:38:28 +02003612 TRACE_STATE("switching to FRAME_H", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
3613 h2c->st0 = H2_CS_FRAME_H;
Christopher Faulet5112a602019-09-26 16:38:28 +02003614 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003615 }
3616 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003617
Willy Tarreau1d7138e2022-06-08 16:32:22 +02003618 if (h2c->rcvd_s > 0 &&
3619 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))) {
3620 TRACE_PROTO("sending stream WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn, h2s);
3621 h2c_send_strm_wu(h2c);
3622 }
3623
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003624 if (h2c->rcvd_c > 0 &&
Willy Tarreau7838a792019-08-12 18:42:03 +02003625 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))) {
3626 TRACE_PROTO("sending H2 WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003627 h2c_send_conn_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003628 }
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003629
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003630 done:
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003631 if (h2c->st0 >= H2_CS_ERROR || (h2c->flags & H2_CF_DEM_SHORT_READ)) {
3632 if (h2c->flags & H2_CF_RCVD_SHUT)
3633 h2c->flags |= H2_CF_END_REACHED;
3634 }
3635
Willy Tarreau567beb82018-12-18 16:52:44 +01003636 if (h2s && h2s->cs &&
3637 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003638 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003639 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003640 (h2s->flags & H2_SF_ES_RCVD) ||
3641 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003642 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003643 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 +01003644 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003645 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003646 }
Willy Tarreau1ed87b72018-11-25 08:45:16 +01003647
Willy Tarreau7838a792019-08-12 18:42:03 +02003648 if (old_iw != h2c->miw) {
3649 TRACE_STATE("notifying streams about SFCTL increase", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003650 h2c_unblock_sfctl(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003651 }
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003652
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003653 h2c_restart_reading(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02003654 out:
3655 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003656 return;
Willy Tarreaubc933932017-10-09 16:21:43 +02003657}
3658
Willy Tarreau989539b2020-01-10 17:01:29 +01003659/* resume each h2s eligible for sending in list head <head> */
3660static void h2_resume_each_sending_h2s(struct h2c *h2c, struct list *head)
3661{
3662 struct h2s *h2s, *h2s_back;
3663
3664 TRACE_ENTER(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3665
3666 list_for_each_entry_safe(h2s, h2s_back, head, list) {
3667 if (h2c->mws <= 0 ||
3668 h2c->flags & H2_CF_MUX_BLOCK_ANY ||
3669 h2c->st0 >= H2_CS_ERROR)
3670 break;
3671
3672 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003673
Willy Tarreaud9464162020-01-10 18:25:07 +01003674 if (h2s->flags & H2_SF_NOTIFIED)
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003675 continue;
3676
Willy Tarreau5723f292020-01-10 15:16:57 +01003677 /* If the sender changed his mind and unsubscribed, let's just
3678 * remove the stream from the send_list.
Willy Tarreau989539b2020-01-10 17:01:29 +01003679 */
Willy Tarreauf96508a2020-01-10 11:12:48 +01003680 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) &&
3681 (!h2s->subs || !(h2s->subs->events & SUB_RETRY_SEND))) {
Willy Tarreau989539b2020-01-10 17:01:29 +01003682 LIST_DEL_INIT(&h2s->list);
3683 continue;
3684 }
3685
Willy Tarreauf96508a2020-01-10 11:12:48 +01003686 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau5723f292020-01-10 15:16:57 +01003687 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01003688 tasklet_wakeup(h2s->subs->tasklet);
3689 h2s->subs->events &= ~SUB_RETRY_SEND;
3690 if (!h2s->subs->events)
3691 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01003692 }
3693 else if (h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) {
3694 tasklet_wakeup(h2s->shut_tl);
3695 }
Willy Tarreau989539b2020-01-10 17:01:29 +01003696 }
3697
3698 TRACE_LEAVE(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3699}
3700
Willy Tarreaubc933932017-10-09 16:21:43 +02003701/* process Tx frames from streams to be multiplexed. Returns > 0 if it reached
3702 * the end.
3703 */
3704static int h2_process_mux(struct h2c *h2c)
3705{
Willy Tarreau7838a792019-08-12 18:42:03 +02003706 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3707
Willy Tarreau01b44822018-10-03 14:26:37 +02003708 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3709 if (unlikely(h2c->st0 == H2_CS_PREFACE && (h2c->flags & H2_CF_IS_BACK))) {
3710 if (unlikely(h2c_bck_send_preface(h2c) <= 0)) {
3711 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003712 if (h2c->st0 == H2_CS_ERROR)
Willy Tarreau01b44822018-10-03 14:26:37 +02003713 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau01b44822018-10-03 14:26:37 +02003714 goto fail;
3715 }
3716 h2c->st0 = H2_CS_SETTINGS1;
3717 }
3718 /* need to wait for the other side */
Willy Tarreau75a930a2018-12-12 08:03:58 +01003719 if (h2c->st0 < H2_CS_FRAME_H)
Willy Tarreau7838a792019-08-12 18:42:03 +02003720 goto done;
Willy Tarreau01b44822018-10-03 14:26:37 +02003721 }
3722
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003723 /* start by sending possibly pending window updates */
Willy Tarreaue74679a2019-08-06 15:39:32 +02003724 if (h2c->rcvd_s > 0 &&
3725 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3726 h2c_send_strm_wu(h2c) < 0)
3727 goto fail;
3728
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003729 if (h2c->rcvd_c > 0 &&
3730 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3731 h2c_send_conn_wu(h2c) < 0)
3732 goto fail;
3733
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003734 /* First we always process the flow control list because the streams
3735 * waiting there were already elected for immediate emission but were
3736 * blocked just on this.
3737 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003738 h2_resume_each_sending_h2s(h2c, &h2c->fctl_list);
3739 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003740
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003741 fail:
Willy Tarreau3eabe9b2017-11-07 11:03:01 +01003742 if (unlikely(h2c->st0 >= H2_CS_ERROR)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02003743 if (h2c->st0 == H2_CS_ERROR) {
3744 if (h2c->max_id >= 0) {
3745 h2c_send_goaway_error(h2c, NULL);
3746 if (h2c->flags & H2_CF_MUX_BLOCK_ANY)
Willy Tarreau7838a792019-08-12 18:42:03 +02003747 goto out0;
Willy Tarreau081d4722017-05-16 21:51:05 +02003748 }
3749
3750 h2c->st0 = H2_CS_ERROR2; // sent (or failed hard) !
3751 }
Willy Tarreau081d4722017-05-16 21:51:05 +02003752 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003753 done:
3754 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
3755 return 1;
3756 out0:
3757 TRACE_DEVEL("leaving in blocked situation", H2_EV_H2C_WAKE, h2c->conn);
3758 return 0;
Willy Tarreaubc933932017-10-09 16:21:43 +02003759}
3760
Willy Tarreau62f52692017-10-08 23:01:42 +02003761
Willy Tarreau479998a2018-11-18 06:30:59 +01003762/* Attempt to read data, and subscribe if none available.
3763 * The function returns 1 if data has been received, otherwise zero.
3764 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003765static int h2_recv(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003766{
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003767 struct connection *conn = h2c->conn;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003768 struct buffer *buf;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003769 int max;
Olivier Houchard7505f942018-08-21 18:10:44 +02003770 size_t ret;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003771
Willy Tarreau7838a792019-08-12 18:42:03 +02003772 TRACE_ENTER(H2_EV_H2C_RECV, h2c->conn);
3773
3774 if (h2c->wait_event.events & SUB_RETRY_RECV) {
3775 TRACE_DEVEL("leaving on sub_recv", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003776 return (b_data(&h2c->dbuf));
Willy Tarreau7838a792019-08-12 18:42:03 +02003777 }
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003778
Willy Tarreau7838a792019-08-12 18:42:03 +02003779 if (!h2_recv_allowed(h2c)) {
3780 TRACE_DEVEL("leaving on !recv_allowed", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003781 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003782 }
Willy Tarreaua2af5122017-10-09 11:56:46 +02003783
Willy Tarreau44e973f2018-03-01 17:49:30 +01003784 buf = h2_get_buf(h2c, &h2c->dbuf);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003785 if (!buf) {
3786 h2c->flags |= H2_CF_DEM_DALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02003787 TRACE_DEVEL("leaving on !alloc", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003788 return 0;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003789 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003790
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003791 if (h2c->flags & H2_CF_RCVD_SHUT) {
3792 TRACE_DEVEL("leaving on rcvd_shut", H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau49acac02021-11-19 11:41:10 +01003793 return 1;
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003794 }
3795
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003796 if (!b_data(buf)) {
3797 /* try to pre-align the buffer like the
3798 * rxbufs will be to optimize memory copies. We'll make
3799 * sure that the frame header lands at the end of the
3800 * HTX block to alias it upon recv. We cannot use the
3801 * head because rcv_buf() will realign the buffer if
3802 * it's empty. Thus we cheat and pretend we already
3803 * have a few bytes there.
3804 */
3805 max = buf_room_for_htx_data(buf) + 9;
3806 buf->head = sizeof(struct htx) - 9;
3807 }
3808 else
3809 max = b_room(buf);
Willy Tarreau2a59e872018-12-12 08:23:47 +01003810
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003811 ret = max ? conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0) : 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003812
Christopher Fauletde9d6052021-04-23 12:25:18 +02003813 if (max && !ret && h2_recv_allowed(h2c)) {
3814 TRACE_DATA("failed to receive data, subscribing", H2_EV_H2C_RECV, h2c->conn);
3815 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h2c->wait_event);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003816 } else if (ret) {
Willy Tarreau022e5e52020-09-10 09:33:15 +02003817 TRACE_DATA("received data", H2_EV_H2C_RECV, h2c->conn, 0, 0, (void*)(long)ret);
Christopher Fauleta9cc1e82021-07-26 12:06:53 +02003818 h2c->flags &= ~H2_CF_DEM_SHORT_READ;
3819 }
Olivier Houchard81a15af2018-10-19 17:26:49 +02003820
Christopher Fauletde9d6052021-04-23 12:25:18 +02003821 if (conn_xprt_read0_pending(h2c->conn)) {
3822 TRACE_DATA("received read0", H2_EV_H2C_RECV, h2c->conn);
3823 h2c->flags |= H2_CF_RCVD_SHUT;
3824 }
3825
Olivier Houcharda1411e62018-08-17 18:42:48 +02003826 if (!b_data(buf)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +01003827 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02003828 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard46677732018-11-29 17:06:17 +01003829 return (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003830 }
3831
Willy Tarreau7838a792019-08-12 18:42:03 +02003832 if (b_data(buf) == buf->size) {
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003833 h2c->flags |= H2_CF_DEM_DFULL;
Willy Tarreau35fb8462019-10-02 11:05:46 +02003834 TRACE_STATE("demux buffer full", H2_EV_H2C_RECV|H2_EV_H2C_BLK, h2c->conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003835 }
3836
3837 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003838 return !!ret || (conn->flags & CO_FL_ERROR) || conn_xprt_read0_pending(conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003839}
3840
Willy Tarreau479998a2018-11-18 06:30:59 +01003841/* Try to send data if possible.
3842 * The function returns 1 if data have been sent, otherwise zero.
3843 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003844static int h2_send(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003845{
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003846 struct connection *conn = h2c->conn;
Willy Tarreaubc933932017-10-09 16:21:43 +02003847 int done;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003848 int sent = 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003849
Willy Tarreau7838a792019-08-12 18:42:03 +02003850 TRACE_ENTER(H2_EV_H2C_SEND, h2c->conn);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003851
Willy Tarreau7838a792019-08-12 18:42:03 +02003852 if (conn->flags & CO_FL_ERROR) {
3853 TRACE_DEVEL("leaving on error", H2_EV_H2C_SEND, h2c->conn);
3854 return 1;
3855 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003856
Willy Tarreau911db9b2020-01-23 16:27:54 +01003857 if (conn->flags & CO_FL_WAIT_XPRT) {
Willy Tarreaua2af5122017-10-09 11:56:46 +02003858 /* a handshake was requested */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003859 goto schedule;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003860 }
3861
Willy Tarreaubc933932017-10-09 16:21:43 +02003862 /* This loop is quite simple : it tries to fill as much as it can from
3863 * pending streams into the existing buffer until it's reportedly full
3864 * or the end of send requests is reached. Then it tries to send this
3865 * buffer's contents out, marks it not full if at least one byte could
3866 * be sent, and tries again.
3867 *
3868 * The snd_buf() function normally takes a "flags" argument which may
3869 * be made of a combination of CO_SFL_MSG_MORE to indicate that more
3870 * data immediately comes and CO_SFL_STREAMER to indicate that the
3871 * connection is streaming lots of data (used to increase TLS record
3872 * size at the expense of latency). The former can be sent any time
3873 * there's a buffer full flag, as it indicates at least one stream
3874 * attempted to send and failed so there are pending data. An
3875 * alternative would be to set it as long as there's an active stream
3876 * but that would be problematic for ACKs until we have an absolute
3877 * guarantee that all waiters have at least one byte to send. The
3878 * latter should possibly not be set for now.
3879 */
3880
3881 done = 0;
3882 while (!done) {
3883 unsigned int flags = 0;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003884 unsigned int released = 0;
3885 struct buffer *buf;
Willy Tarreaubc933932017-10-09 16:21:43 +02003886
3887 /* fill as much as we can into the current buffer */
3888 while (((h2c->flags & (H2_CF_MUX_MFULL|H2_CF_MUX_MALLOC)) == 0) && !done)
3889 done = h2_process_mux(h2c);
3890
Olivier Houchard2b094432019-01-29 18:28:36 +01003891 if (h2c->flags & H2_CF_MUX_MALLOC)
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003892 done = 1; // we won't go further without extra buffers
Olivier Houchard2b094432019-01-29 18:28:36 +01003893
Christopher Faulet9a3d3fc2020-10-22 16:24:58 +02003894 if ((conn->flags & (CO_FL_SOCK_WR_SH|CO_FL_ERROR)) ||
Willy Tarreaue90653b2021-10-21 17:30:06 +02003895 (h2c->flags & H2_CF_GOAWAY_FAILED))
Willy Tarreaubc933932017-10-09 16:21:43 +02003896 break;
3897
3898 if (h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))
3899 flags |= CO_SFL_MSG_MORE;
3900
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003901 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3902 if (b_data(buf)) {
3903 int ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, buf, b_data(buf), flags);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003904 if (!ret) {
3905 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003906 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003907 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003908 sent = 1;
Willy Tarreau022e5e52020-09-10 09:33:15 +02003909 TRACE_DATA("sent data", H2_EV_H2C_SEND, h2c->conn, 0, buf, (void*)(long)ret);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003910 b_del(buf, ret);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003911 if (b_data(buf)) {
3912 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003913 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003914 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003915 }
3916 b_free(buf);
3917 released++;
Willy Tarreau787db9a2018-06-14 18:31:46 +02003918 }
Willy Tarreaubc933932017-10-09 16:21:43 +02003919
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003920 if (released)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01003921 offer_buffers(NULL, released);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003922
Willy Tarreaubc933932017-10-09 16:21:43 +02003923 /* wrote at least one byte, the buffer is not full anymore */
Christopher Faulet69fe5ce2019-10-24 10:31:01 +02003924 if (sent)
3925 h2c->flags &= ~(H2_CF_MUX_MFULL | H2_CF_DEM_MROOM);
Willy Tarreaubc933932017-10-09 16:21:43 +02003926 }
3927
Willy Tarreaua2af5122017-10-09 11:56:46 +02003928 if (conn->flags & CO_FL_SOCK_WR_SH) {
3929 /* output closed, nothing to send, clear the buffer to release it */
Willy Tarreau51330962019-05-26 09:38:07 +02003930 b_reset(br_tail(h2c->mbuf));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003931 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02003932 /* We're not full anymore, so we can wake any task that are waiting
3933 * for us.
3934 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003935 if (!(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM)) && h2c->st0 >= H2_CS_FRAME_H)
3936 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01003937
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003938 /* We're done, no more to send */
Willy Tarreau7838a792019-08-12 18:42:03 +02003939 if (!br_data(h2c->mbuf)) {
3940 TRACE_DEVEL("leaving with everything sent", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003941 return sent;
Willy Tarreau7838a792019-08-12 18:42:03 +02003942 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003943schedule:
Willy Tarreau7838a792019-08-12 18:42:03 +02003944 if (!(conn->flags & CO_FL_ERROR) && !(h2c->wait_event.events & SUB_RETRY_SEND)) {
3945 TRACE_STATE("more data to send, subscribing", H2_EV_H2C_SEND, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003946 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003947 }
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003948
Willy Tarreau7838a792019-08-12 18:42:03 +02003949 TRACE_DEVEL("leaving with some data left to send", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003950 return sent;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003951}
3952
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003953/* this is the tasklet referenced in h2c->wait_event.tasklet */
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003954struct task *h2_io_cb(struct task *t, void *ctx, unsigned int state)
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003955{
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003956 struct connection *conn;
3957 struct tasklet *tl = (struct tasklet *)t;
3958 int conn_in_list;
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003959 struct h2c *h2c = ctx;
Olivier Houchard7505f942018-08-21 18:10:44 +02003960 int ret = 0;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003961
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003962 if (state & TASK_F_USR1) {
3963 /* the tasklet was idling on an idle connection, it might have
3964 * been stolen, let's be careful!
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003965 */
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003966 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3967 if (t->context == NULL) {
3968 /* The connection has been taken over by another thread,
3969 * we're no longer responsible for it, so just free the
3970 * tasklet, and do nothing.
3971 */
3972 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3973 tasklet_free(tl);
Willy Tarreau74163142021-03-13 11:30:19 +01003974 t = NULL;
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003975 goto leave;
3976 }
3977 conn = h2c->conn;
3978 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003979
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003980 conn_in_list = conn->flags & CO_FL_LIST_MASK;
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003981
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003982 /* Remove the connection from the list, to be sure nobody attempts
3983 * to use it while we handle the I/O events
3984 */
3985 if (conn_in_list)
3986 conn_delete_from_tree(&conn->hash_node->node);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003987
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003988 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3989 } else {
3990 /* we're certain the connection was not in an idle list */
3991 conn = h2c->conn;
3992 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3993 conn_in_list = 0;
3994 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003995
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003996 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchard7505f942018-08-21 18:10:44 +02003997 ret = h2_send(h2c);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003998 if (!(h2c->wait_event.events & SUB_RETRY_RECV))
Olivier Houchard7505f942018-08-21 18:10:44 +02003999 ret |= h2_recv(h2c);
Willy Tarreaucef5c8e2018-12-18 10:29:54 +01004000 if (ret || b_data(&h2c->dbuf))
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004001 ret = h2_process(h2c);
4002
4003 /* If we were in an idle list, we want to add it back into it,
4004 * unless h2_process() returned -1, which mean it has destroyed
4005 * the connection (testing !ret is enough, if h2_process() wasn't
4006 * called then ret will be 0 anyway.
4007 */
Willy Tarreau74163142021-03-13 11:30:19 +01004008 if (ret < 0)
4009 t = NULL;
4010
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004011 if (!ret && conn_in_list) {
4012 struct server *srv = objt_server(conn->target);
4013
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004014 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004015 if (conn_in_list == CO_FL_SAFE_LIST)
Willy Tarreau430bf4a2021-03-04 09:45:32 +01004016 ebmb_insert(&srv->per_thr[tid].safe_conns, &conn->hash_node->node, sizeof(conn->hash_node->hash));
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004017 else
Willy Tarreau430bf4a2021-03-04 09:45:32 +01004018 ebmb_insert(&srv->per_thr[tid].idle_conns, &conn->hash_node->node, sizeof(conn->hash_node->hash));
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004019 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004020 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004021
Willy Tarreau38468772020-06-28 00:31:13 +02004022leave:
Willy Tarreau7838a792019-08-12 18:42:03 +02004023 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreau74163142021-03-13 11:30:19 +01004024 return t;
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004025}
Willy Tarreaua2af5122017-10-09 11:56:46 +02004026
Willy Tarreau62f52692017-10-08 23:01:42 +02004027/* callback called on any event by the connection handler.
4028 * It applies changes and returns zero, or < 0 if it wants immediate
4029 * destruction of the connection (which normally doesn not happen in h2).
4030 */
Olivier Houchard7505f942018-08-21 18:10:44 +02004031static int h2_process(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02004032{
Olivier Houchard7505f942018-08-21 18:10:44 +02004033 struct connection *conn = h2c->conn;
Willy Tarreaua2af5122017-10-09 11:56:46 +02004034
Willy Tarreau7838a792019-08-12 18:42:03 +02004035 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
4036
Willy Tarreauf0961222021-02-05 11:41:46 +01004037 if (!(h2c->flags & H2_CF_DEM_BLOCK_ANY) &&
4038 (b_data(&h2c->dbuf) || (h2c->flags & H2_CF_RCVD_SHUT))) {
Willy Tarreaud13bf272017-12-14 10:34:52 +01004039 h2_process_demux(h2c);
4040
4041 if (h2c->st0 >= H2_CS_ERROR || conn->flags & CO_FL_ERROR)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004042 b_reset(&h2c->dbuf);
Willy Tarreaud13bf272017-12-14 10:34:52 +01004043
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004044 if (!b_full(&h2c->dbuf))
Willy Tarreaud13bf272017-12-14 10:34:52 +01004045 h2c->flags &= ~H2_CF_DEM_DFULL;
4046 }
Olivier Houchard7505f942018-08-21 18:10:44 +02004047 h2_send(h2c);
Willy Tarreaud13bf272017-12-14 10:34:52 +01004048
Willy Tarreaub1e600c2020-10-13 18:09:15 +02004049 if (unlikely(h2c->proxy->disabled) && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau8ec14062017-12-30 18:08:13 +01004050 /* frontend is stopping, reload likely in progress, let's try
4051 * to announce a graceful shutdown if not yet done. We don't
4052 * care if it fails, it will be tried again later.
4053 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004054 TRACE_STATE("proxy stopped, sending GOAWAY", H2_EV_H2C_WAKE|H2_EV_TX_FRAME, conn);
Willy Tarreau8ec14062017-12-30 18:08:13 +01004055 if (!(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
4056 if (h2c->last_sid < 0)
4057 h2c->last_sid = (1U << 31) - 1;
4058 h2c_send_goaway_error(h2c, NULL);
4059 }
4060 }
4061
Olivier Houchard7fc96d52017-11-23 18:25:47 +01004062 /*
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004063 * If we received early data, and the handshake is done, wake
4064 * any stream that was waiting for it.
Olivier Houchard7fc96d52017-11-23 18:25:47 +01004065 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004066 if (!(h2c->flags & H2_CF_WAIT_FOR_HS) &&
Willy Tarreau911db9b2020-01-23 16:27:54 +01004067 (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 +01004068 struct eb32_node *node;
4069 struct h2s *h2s;
4070
4071 h2c->flags |= H2_CF_WAIT_FOR_HS;
4072 node = eb32_lookup_ge(&h2c->streams_by_id, 1);
4073
4074 while (node) {
4075 h2s = container_of(node, struct h2s, by_id);
Willy Tarreaufde287c2018-12-19 18:33:16 +01004076 if (h2s->cs && h2s->cs->flags & CS_FL_WAIT_FOR_HS)
Willy Tarreau7e094452018-12-19 18:08:52 +01004077 h2s_notify_recv(h2s);
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004078 node = eb32_next(node);
4079 }
Olivier Houchard7fc96d52017-11-23 18:25:47 +01004080 }
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004081
Christopher Fauletaade4ed2020-10-08 15:38:41 +02004082 if (conn->flags & CO_FL_ERROR || h2c_read0_pending(h2c) ||
Willy Tarreau29a98242017-10-31 06:59:15 +01004083 h2c->st0 == H2_CS_ERROR2 || h2c->flags & H2_CF_GOAWAY_FAILED ||
4084 (eb_is_empty(&h2c->streams_by_id) && h2c->last_sid >= 0 &&
4085 h2c->max_id >= h2c->last_sid)) {
Willy Tarreau23482912019-05-07 15:23:14 +02004086 h2_wake_some_streams(h2c, 0);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004087
4088 if (eb_is_empty(&h2c->streams_by_id)) {
4089 /* no more stream, kill the connection now */
Christopher Faulet73c12072019-04-08 11:23:22 +02004090 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004091 TRACE_DEVEL("leaving after releasing the connection", H2_EV_H2C_WAKE);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004092 return -1;
4093 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004094
4095 /* connections in error must be removed from the idle lists */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004096 if (conn->flags & CO_FL_LIST_MASK) {
4097 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004098 conn_delete_from_tree(&conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004099 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4100 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004101 }
4102 else if (h2c->st0 == H2_CS_ERROR) {
4103 /* connections in error must be removed from the idle lists */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004104 if (conn->flags & CO_FL_LIST_MASK) {
4105 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004106 conn_delete_from_tree(&conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004107 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4108 }
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004109 }
4110
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004111 if (!b_data(&h2c->dbuf))
Willy Tarreau44e973f2018-03-01 17:49:30 +01004112 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004113
Olivier Houchard53216e72018-10-10 15:46:36 +02004114 if ((conn->flags & CO_FL_SOCK_WR_SH) ||
4115 h2c->st0 == H2_CS_ERROR2 || (h2c->flags & H2_CF_GOAWAY_FAILED) ||
4116 (h2c->st0 != H2_CS_ERROR &&
Willy Tarreau662fafc2019-05-26 09:43:07 +02004117 !br_data(h2c->mbuf) &&
Olivier Houchard53216e72018-10-10 15:46:36 +02004118 (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) &&
4119 ((h2c->flags & H2_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&h2c->send_list))))
Willy Tarreau2e3c0002019-05-26 09:45:23 +02004120 h2_release_mbuf(h2c);
Willy Tarreaua2af5122017-10-09 11:56:46 +02004121
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01004122 h2c_update_timeout(h2c);
Olivier Houchard7505f942018-08-21 18:10:44 +02004123 h2_send(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004124 TRACE_LEAVE(H2_EV_H2C_WAKE, conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02004125 return 0;
4126}
4127
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004128/* wake-up function called by the connection layer (mux_ops.wake) */
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004129static int h2_wake(struct connection *conn)
4130{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004131 struct h2c *h2c = conn->ctx;
Willy Tarreau7838a792019-08-12 18:42:03 +02004132 int ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004133
Willy Tarreau7838a792019-08-12 18:42:03 +02004134 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
4135 ret = h2_process(h2c);
Willy Tarreau508f9892020-02-11 04:38:56 +01004136 if (ret >= 0)
4137 h2_wake_some_streams(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02004138 TRACE_LEAVE(H2_EV_H2C_WAKE);
4139 return ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004140}
4141
Willy Tarreauea392822017-10-31 10:02:25 +01004142/* Connection timeout management. The principle is that if there's no receipt
4143 * nor sending for a certain amount of time, the connection is closed. If the
4144 * MUX buffer still has lying data or is not allocatable, the connection is
4145 * immediately killed. If it's allocatable and empty, we attempt to send a
4146 * GOAWAY frame.
4147 */
Willy Tarreau144f84a2021-03-02 16:09:26 +01004148struct task *h2_timeout_task(struct task *t, void *context, unsigned int state)
Willy Tarreauea392822017-10-31 10:02:25 +01004149{
Olivier Houchard9f6af332018-05-25 14:04:04 +02004150 struct h2c *h2c = context;
Willy Tarreauea392822017-10-31 10:02:25 +01004151 int expired = tick_is_expired(t->expire, now_ms);
4152
Willy Tarreau7838a792019-08-12 18:42:03 +02004153 TRACE_ENTER(H2_EV_H2C_WAKE, h2c ? h2c->conn : NULL);
4154
Willy Tarreaubd42e922020-06-30 11:19:23 +02004155 if (h2c) {
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004156 /* Make sure nobody stole the connection from us */
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004157 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004158
4159 /* Somebody already stole the connection from us, so we should not
4160 * free it, we just have to free the task.
4161 */
4162 if (!t->context) {
4163 h2c = NULL;
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004164 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004165 goto do_leave;
4166 }
4167
4168
Willy Tarreaubd42e922020-06-30 11:19:23 +02004169 if (!expired) {
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004170 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004171 TRACE_DEVEL("leaving (not expired)", H2_EV_H2C_WAKE, h2c->conn);
4172 return t;
4173 }
Willy Tarreauea392822017-10-31 10:02:25 +01004174
Willy Tarreaubd42e922020-06-30 11:19:23 +02004175 if (!h2c_may_expire(h2c)) {
4176 /* we do still have streams but all of them are idle, waiting
4177 * for the data layer, so we must not enforce the timeout here.
4178 */
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004179 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004180 t->expire = TICK_ETERNITY;
4181 return t;
4182 }
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02004183
Willy Tarreaubd42e922020-06-30 11:19:23 +02004184 /* We're about to destroy the connection, so make sure nobody attempts
4185 * to steal it from us.
4186 */
Willy Tarreaubd42e922020-06-30 11:19:23 +02004187 if (h2c->conn->flags & CO_FL_LIST_MASK)
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004188 conn_delete_from_tree(&h2c->conn->hash_node->node);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004189
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004190 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004191 }
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004192
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004193do_leave:
Olivier Houchard3f795f72019-04-17 22:51:06 +02004194 task_destroy(t);
Willy Tarreau0975f112018-03-29 15:22:59 +02004195
4196 if (!h2c) {
4197 /* resources were already deleted */
Willy Tarreau7838a792019-08-12 18:42:03 +02004198 TRACE_DEVEL("leaving (not more h2c)", H2_EV_H2C_WAKE);
Willy Tarreau0975f112018-03-29 15:22:59 +02004199 return NULL;
4200 }
4201
4202 h2c->task = NULL;
Willy Tarreauea392822017-10-31 10:02:25 +01004203 h2c_error(h2c, H2_ERR_NO_ERROR);
Willy Tarreau23482912019-05-07 15:23:14 +02004204 h2_wake_some_streams(h2c, 0);
Willy Tarreauea392822017-10-31 10:02:25 +01004205
Willy Tarreau662fafc2019-05-26 09:43:07 +02004206 if (br_data(h2c->mbuf)) {
Willy Tarreauea392822017-10-31 10:02:25 +01004207 /* don't even try to send a GOAWAY, the buffer is stuck */
4208 h2c->flags |= H2_CF_GOAWAY_FAILED;
4209 }
4210
4211 /* try to send but no need to insist */
Willy Tarreau599391a2017-11-24 10:16:00 +01004212 h2c->last_sid = h2c->max_id;
Willy Tarreauea392822017-10-31 10:02:25 +01004213 if (h2c_send_goaway_error(h2c, NULL) <= 0)
4214 h2c->flags |= H2_CF_GOAWAY_FAILED;
4215
Willy Tarreau662fafc2019-05-26 09:43:07 +02004216 if (br_data(h2c->mbuf) && !(h2c->flags & H2_CF_GOAWAY_FAILED) && conn_xprt_ready(h2c->conn)) {
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004217 unsigned int released = 0;
4218 struct buffer *buf;
4219
4220 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
4221 if (b_data(buf)) {
4222 int ret = h2c->conn->xprt->snd_buf(h2c->conn, h2c->conn->xprt_ctx, buf, b_data(buf), 0);
4223 if (!ret)
4224 break;
4225 b_del(buf, ret);
4226 if (b_data(buf))
4227 break;
4228 b_free(buf);
4229 released++;
4230 }
Willy Tarreau787db9a2018-06-14 18:31:46 +02004231 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004232
4233 if (released)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01004234 offer_buffers(NULL, released);
Willy Tarreau787db9a2018-06-14 18:31:46 +02004235 }
Willy Tarreauea392822017-10-31 10:02:25 +01004236
Willy Tarreau4481e262019-10-31 15:36:30 +01004237 /* in any case this connection must not be considered idle anymore */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004238 if (h2c->conn->flags & CO_FL_LIST_MASK) {
4239 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004240 conn_delete_from_tree(&h2c->conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004241 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4242 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004243
Willy Tarreau0975f112018-03-29 15:22:59 +02004244 /* either we can release everything now or it will be done later once
4245 * the last stream closes.
4246 */
4247 if (eb_is_empty(&h2c->streams_by_id))
Christopher Faulet73c12072019-04-08 11:23:22 +02004248 h2_release(h2c);
Willy Tarreauea392822017-10-31 10:02:25 +01004249
Willy Tarreau7838a792019-08-12 18:42:03 +02004250 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreauea392822017-10-31 10:02:25 +01004251 return NULL;
4252}
4253
4254
Willy Tarreau62f52692017-10-08 23:01:42 +02004255/*******************************************/
4256/* functions below are used by the streams */
4257/*******************************************/
4258
4259/*
4260 * Attach a new stream to a connection
4261 * (Used for outgoing connections)
4262 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01004263static struct conn_stream *h2_attach(struct connection *conn, struct session *sess)
Willy Tarreau62f52692017-10-08 23:01:42 +02004264{
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004265 struct conn_stream *cs;
4266 struct h2s *h2s;
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004267 struct h2c *h2c = conn->ctx;
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004268
Willy Tarreau7838a792019-08-12 18:42:03 +02004269 TRACE_ENTER(H2_EV_H2S_NEW, conn);
Christopher Faulet236c93b2020-07-02 09:19:54 +02004270 cs = cs_new(conn, conn->target);
Willy Tarreau7838a792019-08-12 18:42:03 +02004271 if (!cs) {
4272 TRACE_DEVEL("leaving on CS allocation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004273 return NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004274 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01004275 h2s = h2c_bck_stream_new(h2c, cs, sess);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004276 if (!h2s) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004277 TRACE_DEVEL("leaving on stream creation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004278 cs_free(cs);
4279 return NULL;
4280 }
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004281
4282 /* the connection is not idle anymore, let's mark this */
4283 HA_ATOMIC_AND(&h2c->wait_event.tasklet->state, ~TASK_F_USR1);
Willy Tarreau4f8cd432021-03-02 17:27:58 +01004284 xprt_set_used(h2c->conn, h2c->conn->xprt, h2c->conn->xprt_ctx);
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004285
Willy Tarreau7838a792019-08-12 18:42:03 +02004286 TRACE_LEAVE(H2_EV_H2S_NEW, conn, h2s);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004287 return cs;
Willy Tarreau62f52692017-10-08 23:01:42 +02004288}
4289
Willy Tarreaufafd3982018-11-18 21:29:20 +01004290/* Retrieves the first valid conn_stream from this connection, or returns NULL.
4291 * We have to scan because we may have some orphan streams. It might be
4292 * beneficial to scan backwards from the end to reduce the likeliness to find
4293 * orphans.
4294 */
4295static const struct conn_stream *h2_get_first_cs(const struct connection *conn)
4296{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004297 struct h2c *h2c = conn->ctx;
Willy Tarreaufafd3982018-11-18 21:29:20 +01004298 struct h2s *h2s;
4299 struct eb32_node *node;
4300
4301 node = eb32_first(&h2c->streams_by_id);
4302 while (node) {
4303 h2s = container_of(node, struct h2s, by_id);
4304 if (h2s->cs)
4305 return h2s->cs;
4306 node = eb32_next(node);
4307 }
4308 return NULL;
4309}
4310
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004311static int h2_ctl(struct connection *conn, enum mux_ctl_type mux_ctl, void *output)
4312{
4313 int ret = 0;
4314 struct h2c *h2c = conn->ctx;
4315
4316 switch (mux_ctl) {
4317 case MUX_STATUS:
4318 /* Only consider the mux to be ready if we're done with
4319 * the preface and settings, and we had no error.
4320 */
4321 if (h2c->st0 >= H2_CS_FRAME_H && h2c->st0 < H2_CS_ERROR)
4322 ret |= MUX_STATUS_READY;
4323 return ret;
Christopher Faulet4c8ad842020-10-06 14:59:17 +02004324 case MUX_EXIT_STATUS:
4325 return MUX_ES_UNKNOWN;
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004326 default:
4327 return -1;
4328 }
4329}
4330
Willy Tarreau62f52692017-10-08 23:01:42 +02004331/*
Olivier Houchard060ed432018-11-06 16:32:42 +01004332 * Destroy the mux and the associated connection, if it is no longer used
4333 */
Christopher Faulet73c12072019-04-08 11:23:22 +02004334static void h2_destroy(void *ctx)
Olivier Houchard060ed432018-11-06 16:32:42 +01004335{
Christopher Faulet73c12072019-04-08 11:23:22 +02004336 struct h2c *h2c = ctx;
Olivier Houchard060ed432018-11-06 16:32:42 +01004337
Willy Tarreau7838a792019-08-12 18:42:03 +02004338 TRACE_ENTER(H2_EV_H2C_END, h2c->conn);
Christopher Faulet39a96ee2019-04-08 10:52:21 +02004339 if (eb_is_empty(&h2c->streams_by_id) || !h2c->conn || h2c->conn->ctx != h2c)
Christopher Faulet73c12072019-04-08 11:23:22 +02004340 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004341 TRACE_LEAVE(H2_EV_H2C_END);
Olivier Houchard060ed432018-11-06 16:32:42 +01004342}
4343
4344/*
Willy Tarreau62f52692017-10-08 23:01:42 +02004345 * Detach the stream from the connection and possibly release the connection.
4346 */
4347static void h2_detach(struct conn_stream *cs)
4348{
Willy Tarreau60935142017-10-16 18:11:19 +02004349 struct h2s *h2s = cs->ctx;
4350 struct h2c *h2c;
Olivier Houchardf502aca2018-12-14 19:42:40 +01004351 struct session *sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004352
Willy Tarreau7838a792019-08-12 18:42:03 +02004353 TRACE_ENTER(H2_EV_STRM_END, h2s ? h2s->h2c->conn : NULL, h2s);
4354
Willy Tarreau60935142017-10-16 18:11:19 +02004355 cs->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004356 if (!h2s) {
4357 TRACE_LEAVE(H2_EV_STRM_END);
Willy Tarreau60935142017-10-16 18:11:19 +02004358 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004359 }
Willy Tarreau60935142017-10-16 18:11:19 +02004360
Willy Tarreaud9464162020-01-10 18:25:07 +01004361 /* there's no txbuf so we're certain not to be able to send anything */
4362 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02004363
Olivier Houchardf502aca2018-12-14 19:42:40 +01004364 sess = h2s->sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004365 h2c = h2s->h2c;
4366 h2s->cs = NULL;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02004367 h2c->nb_cs--;
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01004368 if (!h2c->nb_cs)
4369 h2c->idle_start = now_ms;
4370
Willy Tarreaufa1d3572019-01-31 10:31:51 +01004371 if ((h2c->flags & (H2_CF_IS_BACK|H2_CF_DEM_TOOMANY)) == H2_CF_DEM_TOOMANY &&
4372 !h2_frt_has_too_many_cs(h2c)) {
4373 /* frontend connection was blocking new streams creation */
Willy Tarreauf2101912018-07-19 10:11:38 +02004374 h2c->flags &= ~H2_CF_DEM_TOOMANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004375 h2c_restart_reading(h2c, 1);
Willy Tarreauf2101912018-07-19 10:11:38 +02004376 }
Willy Tarreau60935142017-10-16 18:11:19 +02004377
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004378 /* this stream may be blocked waiting for some data to leave (possibly
4379 * an ES or RST frame), so orphan it in this case.
4380 */
Willy Tarreau3041fcc2018-03-29 15:41:32 +02004381 if (!(cs->conn->flags & CO_FL_ERROR) &&
Willy Tarreaua2b51812018-07-27 09:55:14 +02004382 (h2c->st0 < H2_CS_ERROR) &&
Willy Tarreau5723f292020-01-10 15:16:57 +01004383 (h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL)) &&
Willy Tarreauf96508a2020-01-10 11:12:48 +01004384 ((h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) || h2s->subs)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004385 TRACE_DEVEL("leaving on stream blocked", H2_EV_STRM_END|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01004386 /* refresh the timeout if none was active, so that the last
4387 * leaving stream may arm it.
4388 */
4389 if (!tick_isset(h2c->task->expire))
4390 h2c_update_timeout(h2c);
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004391 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004392 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004393
Willy Tarreau45f752e2017-10-30 15:44:59 +01004394 if ((h2c->flags & H2_CF_DEM_BLOCK_ANY && h2s->id == h2c->dsi) ||
4395 (h2c->flags & H2_CF_MUX_BLOCK_ANY && h2s->id == h2c->msi)) {
4396 /* unblock the connection if it was blocked on this
4397 * stream.
4398 */
4399 h2c->flags &= ~H2_CF_DEM_BLOCK_ANY;
4400 h2c->flags &= ~H2_CF_MUX_BLOCK_ANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004401 h2c_restart_reading(h2c, 1);
Willy Tarreau45f752e2017-10-30 15:44:59 +01004402 }
4403
Willy Tarreau71049cc2018-03-28 13:56:39 +02004404 h2s_destroy(h2s);
Willy Tarreau60935142017-10-16 18:11:19 +02004405
Christopher Faulet9b79a102019-07-15 11:22:56 +02004406 if (h2c->flags & H2_CF_IS_BACK) {
Olivier Houchard8a786902018-12-15 16:05:40 +01004407 if (!(h2c->conn->flags &
4408 (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH))) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004409 if (h2c->conn->flags & CO_FL_PRIVATE) {
Christopher Faulet08016ab2020-07-01 16:10:06 +02004410 /* Add the connection in the session server list, if not already done */
4411 if (!session_add_conn(sess, h2c->conn, h2c->conn->target)) {
4412 h2c->conn->owner = NULL;
4413 if (eb_is_empty(&h2c->streams_by_id)) {
4414 h2c->conn->mux->destroy(h2c);
4415 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4416 return;
Christopher Fauletc5579d12020-07-01 15:45:41 +02004417 }
4418 }
Christopher Faulet08016ab2020-07-01 16:10:06 +02004419 if (eb_is_empty(&h2c->streams_by_id)) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004420 if (session_check_idle_conn(h2c->conn->owner, h2c->conn) != 0) {
4421 /* At this point either the connection is destroyed, or it's been added to the server idle list, just stop */
4422 TRACE_DEVEL("leaving without reusable idle connection", H2_EV_STRM_END);
Olivier Houchard351411f2018-12-27 17:20:54 +01004423 return;
4424 }
4425 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004426 }
Christopher Fauletc5579d12020-07-01 15:45:41 +02004427 else {
4428 if (eb_is_empty(&h2c->streams_by_id)) {
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004429 /* If the connection is owned by the session, first remove it
4430 * from its list
4431 */
4432 if (h2c->conn->owner) {
4433 session_unown_conn(h2c->conn->owner, h2c->conn);
4434 h2c->conn->owner = NULL;
4435 }
4436
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004437 /* mark that the tasklet may lose its context to another thread and
4438 * that the handler needs to check it under the idle conns lock.
4439 */
4440 HA_ATOMIC_OR(&h2c->wait_event.tasklet->state, TASK_F_USR1);
Willy Tarreau4f8cd432021-03-02 17:27:58 +01004441 xprt_set_idle(h2c->conn, h2c->conn->xprt, h2c->conn->xprt_ctx);
4442
Olivier Houcharddc2f2752020-02-13 19:12:07 +01004443 if (!srv_add_to_idle_list(objt_server(h2c->conn->target), h2c->conn, 1)) {
Olivier Houchard2444aa52020-01-20 13:56:01 +01004444 /* The server doesn't want it, let's kill the connection right away */
4445 h2c->conn->mux->destroy(h2c);
4446 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4447 return;
4448 }
Olivier Houchard199d4fa2020-03-22 23:25:51 +01004449 /* At this point, the connection has been added to the
4450 * server idle list, so another thread may already have
4451 * hijacked it, so we can't do anything with it.
4452 */
Olivier Houchard2444aa52020-01-20 13:56:01 +01004453 TRACE_DEVEL("reusable idle connection", H2_EV_STRM_END);
4454 return;
Olivier Houchard8a786902018-12-15 16:05:40 +01004455
Olivier Houchard8a786902018-12-15 16:05:40 +01004456 }
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004457 else if (!h2c->conn->hash_node->node.node.leaf_p &&
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004458 h2_avail_streams(h2c->conn) > 0 && objt_server(h2c->conn->target) &&
Willy Tarreau2b718102021-04-21 07:32:39 +02004459 !LIST_INLIST(&h2c->conn->session_list)) {
Willy Tarreau430bf4a2021-03-04 09:45:32 +01004460 ebmb_insert(&__objt_server(h2c->conn->target)->per_thr[tid].avail_conns,
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004461 &h2c->conn->hash_node->node,
4462 sizeof(h2c->conn->hash_node->hash));
Christopher Fauletc5579d12020-07-01 15:45:41 +02004463 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004464 }
4465 }
4466 }
4467
Willy Tarreaue323f342018-03-28 13:51:45 +02004468 /* We don't want to close right now unless we're removing the
4469 * last stream, and either the connection is in error, or it
4470 * reached the ID already specified in a GOAWAY frame received
4471 * or sent (as seen by last_sid >= 0).
4472 */
Olivier Houchard7a977432019-03-21 15:47:13 +01004473 if (h2c_is_dead(h2c)) {
Willy Tarreaue323f342018-03-28 13:51:45 +02004474 /* no more stream will come, kill it now */
Willy Tarreau7838a792019-08-12 18:42:03 +02004475 TRACE_DEVEL("leaving and killing dead connection", H2_EV_STRM_END, h2c->conn);
Christopher Faulet73c12072019-04-08 11:23:22 +02004476 h2_release(h2c);
Willy Tarreaue323f342018-03-28 13:51:45 +02004477 }
4478 else if (h2c->task) {
Willy Tarreauf5b2c3f2022-03-18 15:57:34 +01004479 h2c_update_timeout(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004480 TRACE_DEVEL("leaving, refreshing connection's timeout", H2_EV_STRM_END, h2c->conn);
Willy Tarreau60935142017-10-16 18:11:19 +02004481 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004482 else
4483 TRACE_DEVEL("leaving", H2_EV_STRM_END, h2c->conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02004484}
4485
Willy Tarreau88bdba32019-05-13 18:17:53 +02004486/* Performs a synchronous or asynchronous shutr(). */
4487static void h2_do_shutr(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004488{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004489 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004490
Willy Tarreauf983d002019-05-14 10:40:21 +02004491 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004492 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004493
Willy Tarreau7838a792019-08-12 18:42:03 +02004494 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4495
Willy Tarreau18059042019-01-31 19:12:48 +01004496 /* a connstream may require us to immediately kill the whole connection
4497 * for example because of a "tcp-request content reject" rule that is
4498 * normally used to limit abuse. In this case we schedule a goaway to
4499 * close the connection.
Willy Tarreau926fa4c2017-11-07 14:42:12 +01004500 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004501 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004502 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004503 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004504 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4505 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4506 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004507 else if (!(h2s->flags & H2_SF_HEADERS_SENT)) {
4508 /* Nothing was never sent for this stream, so reset with
4509 * REFUSED_STREAM error to let the client retry the
4510 * request.
4511 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004512 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004513 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4514 }
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004515 else {
4516 /* a final response was already provided, we don't want this
4517 * stream anymore. This may happen when the server responds
4518 * before the end of an upload and closes quickly (redirect,
4519 * deny, ...)
4520 */
4521 h2s_error(h2s, H2_ERR_CANCEL);
4522 }
Willy Tarreau18059042019-01-31 19:12:48 +01004523
Willy Tarreau90c32322017-11-24 08:00:30 +01004524 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004525 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004526 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004527
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004528 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004529 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau00dd0782018-03-01 16:31:34 +01004530 h2s_close(h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004531 done:
4532 h2s->flags &= ~H2_SF_WANT_SHUTR;
Willy Tarreau7838a792019-08-12 18:42:03 +02004533 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004534 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004535add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004536 /* Let the handler know we want to shutr, and add ourselves to the
4537 * most relevant list if not yet done. h2_deferred_shut() will be
4538 * automatically called via the shut_tl tasklet when there's room
4539 * again.
4540 */
4541 h2s->flags |= H2_SF_WANT_SHUTR;
Willy Tarreau2b718102021-04-21 07:32:39 +02004542 if (!LIST_INLIST(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004543 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02004544 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004545 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Willy Tarreau2b718102021-04-21 07:32:39 +02004546 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004547 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004548 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004549 return;
Willy Tarreau62f52692017-10-08 23:01:42 +02004550}
4551
Willy Tarreau88bdba32019-05-13 18:17:53 +02004552/* Performs a synchronous or asynchronous shutw(). */
4553static void h2_do_shutw(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004554{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004555 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004556
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004557 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004558 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004559
Willy Tarreau7838a792019-08-12 18:42:03 +02004560 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4561
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004562 if (h2s->st != H2_SS_ERROR && (h2s->flags & H2_SF_HEADERS_SENT)) {
Willy Tarreau58e32082017-11-07 14:41:09 +01004563 /* we can cleanly close using an empty data frame only after headers */
4564
4565 if (!(h2s->flags & (H2_SF_ES_SENT|H2_SF_RST_SENT)) &&
4566 h2_send_empty_data_es(h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004567 goto add_to_list;
Willy Tarreau58e32082017-11-07 14:41:09 +01004568
4569 if (h2s->st == H2_SS_HREM)
Willy Tarreau00dd0782018-03-01 16:31:34 +01004570 h2s_close(h2s);
Willy Tarreau58e32082017-11-07 14:41:09 +01004571 else
4572 h2s->st = H2_SS_HLOC;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004573 } else {
Willy Tarreau18059042019-01-31 19:12:48 +01004574 /* a connstream may require us to immediately kill the whole connection
4575 * for example because of a "tcp-request content reject" rule that is
4576 * normally used to limit abuse. In this case we schedule a goaway to
4577 * close the connection.
Willy Tarreaua1349f02017-10-31 07:41:55 +01004578 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004579 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004580 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004581 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004582 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4583 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4584 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004585 else {
4586 /* Nothing was never sent for this stream, so reset with
4587 * REFUSED_STREAM error to let the client retry the
4588 * request.
4589 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004590 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004591 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4592 }
Willy Tarreau18059042019-01-31 19:12:48 +01004593
Willy Tarreau90c32322017-11-24 08:00:30 +01004594 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004595 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004596 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004597
Willy Tarreau00dd0782018-03-01 16:31:34 +01004598 h2s_close(h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004599 }
4600
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004601 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004602 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau7838a792019-08-12 18:42:03 +02004603
4604 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
4605
Willy Tarreau88bdba32019-05-13 18:17:53 +02004606 done:
4607 h2s->flags &= ~H2_SF_WANT_SHUTW;
4608 return;
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004609
4610 add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004611 /* Let the handler know we want to shutw, and add ourselves to the
4612 * most relevant list if not yet done. h2_deferred_shut() will be
4613 * automatically called via the shut_tl tasklet when there's room
4614 * again.
4615 */
4616 h2s->flags |= H2_SF_WANT_SHUTW;
Willy Tarreau2b718102021-04-21 07:32:39 +02004617 if (!LIST_INLIST(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004618 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02004619 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004620 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Willy Tarreau2b718102021-04-21 07:32:39 +02004621 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004622 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004623 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004624 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004625}
4626
Willy Tarreau5723f292020-01-10 15:16:57 +01004627/* This is the tasklet referenced in h2s->shut_tl, it is used for
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004628 * deferred shutdowns when the h2_detach() was done but the mux buffer was full
4629 * and prevented the last frame from being emitted.
4630 */
Willy Tarreau144f84a2021-03-02 16:09:26 +01004631struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned int state)
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004632{
4633 struct h2s *h2s = ctx;
Willy Tarreau88bdba32019-05-13 18:17:53 +02004634 struct h2c *h2c = h2s->h2c;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004635
Willy Tarreau7838a792019-08-12 18:42:03 +02004636 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4637
Willy Tarreau5723f292020-01-10 15:16:57 +01004638 if (h2s->flags & H2_SF_NOTIFIED) {
4639 /* some data processing remains to be done first */
4640 goto end;
4641 }
4642
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004643 if (h2s->flags & H2_SF_WANT_SHUTW)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004644 h2_do_shutw(h2s);
4645
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004646 if (h2s->flags & H2_SF_WANT_SHUTR)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004647 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004648
Willy Tarreau88bdba32019-05-13 18:17:53 +02004649 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004650 /* We're done trying to send, remove ourself from the send_list */
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004651 LIST_DEL_INIT(&h2s->list);
Olivier Houchard7a977432019-03-21 15:47:13 +01004652
Willy Tarreau88bdba32019-05-13 18:17:53 +02004653 if (!h2s->cs) {
4654 h2s_destroy(h2s);
Willy Tarreau74163142021-03-13 11:30:19 +01004655 if (h2c_is_dead(h2c)) {
Willy Tarreau88bdba32019-05-13 18:17:53 +02004656 h2_release(h2c);
Willy Tarreau74163142021-03-13 11:30:19 +01004657 t = NULL;
4658 }
Willy Tarreau88bdba32019-05-13 18:17:53 +02004659 }
Olivier Houchard7a977432019-03-21 15:47:13 +01004660 }
Willy Tarreau5723f292020-01-10 15:16:57 +01004661 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02004662 TRACE_LEAVE(H2_EV_STRM_SHUT);
Willy Tarreau74163142021-03-13 11:30:19 +01004663 return t;
Willy Tarreau62f52692017-10-08 23:01:42 +02004664}
4665
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004666/* shutr() called by the conn_stream (mux_ops.shutr) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004667static void h2_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
4668{
4669 struct h2s *h2s = cs->ctx;
4670
Willy Tarreau7838a792019-08-12 18:42:03 +02004671 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004672 if (cs->flags & CS_FL_KILL_CONN)
4673 h2s->flags |= H2_SF_KILL_CONN;
4674
Willy Tarreau7838a792019-08-12 18:42:03 +02004675 if (mode)
4676 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004677
Willy Tarreau7838a792019-08-12 18:42:03 +02004678 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004679}
4680
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004681/* shutw() called by the conn_stream (mux_ops.shutw) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004682static void h2_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
4683{
4684 struct h2s *h2s = cs->ctx;
4685
Willy Tarreau7838a792019-08-12 18:42:03 +02004686 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004687 if (cs->flags & CS_FL_KILL_CONN)
4688 h2s->flags |= H2_SF_KILL_CONN;
4689
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004690 h2_do_shutw(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02004691 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004692}
4693
Christopher Faulet9b79a102019-07-15 11:22:56 +02004694/* Decode the payload of a HEADERS frame and produce the HTX request or response
4695 * depending on the connection's side. Returns a positive value on success, a
4696 * negative value on failure, or 0 if it couldn't proceed. May report connection
4697 * errors in h2c->errcode if the frame is non-decodable and the connection
4698 * unrecoverable. In absence of connection error when a failure is reported, the
4699 * caller must assume a stream error.
Willy Tarreauea18f862018-12-22 20:19:26 +01004700 *
4701 * The function may fold CONTINUATION frames into the initial HEADERS frame
4702 * by removing padding and next frame header, then moving the CONTINUATION
4703 * frame's payload and adjusting h2c->dfl to match the new aggregated frame,
4704 * leaving a hole between the main frame and the beginning of the next one.
4705 * The possibly remaining incomplete or next frame at the end may be moved
4706 * if the aggregated frame is not deleted, in order to fill the hole. Wrapped
4707 * HEADERS frames are unwrapped into a temporary buffer before decoding.
4708 *
4709 * A buffer at the beginning of processing may look like this :
4710 *
4711 * ,---.---------.-----.--------------.--------------.------.---.
4712 * |///| HEADERS | PAD | CONTINUATION | CONTINUATION | DATA |///|
4713 * `---^---------^-----^--------------^--------------^------^---'
4714 * | | <-----> | |
4715 * area | dpl | wrap
4716 * |<--------------> |
4717 * | dfl |
4718 * |<-------------------------------------------------->|
4719 * head data
4720 *
4721 * Padding is automatically overwritten when folding, participating to the
4722 * hole size after dfl :
4723 *
4724 * ,---.------------------------.-----.--------------.------.---.
4725 * |///| HEADERS : CONTINUATION |/////| CONTINUATION | DATA |///|
4726 * `---^------------------------^-----^--------------^------^---'
4727 * | | <-----> | |
4728 * area | hole | wrap
4729 * |<-----------------------> |
4730 * | dfl |
4731 * |<-------------------------------------------------->|
4732 * head data
4733 *
4734 * Please note that the HEADERS frame is always deprived from its PADLEN byte
4735 * however it may start with the 5 stream-dep+weight bytes in case of PRIORITY
4736 * bit.
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004737 *
4738 * The <flags> field must point to either the stream's flags or to a copy of it
4739 * so that the function can update the following flags :
4740 * - H2_SF_DATA_CLEN when content-length is seen
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004741 * - H2_SF_HEADERS_RCVD once the frame is successfully decoded
Willy Tarreau88d138e2019-01-02 19:38:14 +01004742 *
4743 * The H2_SF_HEADERS_RCVD flag is also looked at in the <flags> field prior to
4744 * decoding, in order to detect if we're dealing with a headers or a trailers
4745 * block (the trailers block appears after H2_SF_HEADERS_RCVD was seen).
Willy Tarreau13278b42017-10-13 19:23:14 +02004746 */
Amaury Denoyelle74162742020-12-11 17:53:05 +01004747static 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 +02004748{
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004749 const uint8_t *hdrs = (uint8_t *)b_head(&h2c->dbuf);
Willy Tarreau83061a82018-07-13 11:56:34 +02004750 struct buffer *tmp = get_trash_chunk();
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004751 struct http_hdr list[global.tune.max_http_hdr * 2];
Willy Tarreau83061a82018-07-13 11:56:34 +02004752 struct buffer *copy = NULL;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004753 unsigned int msgf;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004754 struct htx *htx = NULL;
Willy Tarreauea18f862018-12-22 20:19:26 +01004755 int flen; // header frame len
4756 int hole = 0;
Willy Tarreau86277d42019-01-02 15:36:11 +01004757 int ret = 0;
4758 int outlen;
Willy Tarreau13278b42017-10-13 19:23:14 +02004759 int wrap;
Willy Tarreau13278b42017-10-13 19:23:14 +02004760
Willy Tarreau7838a792019-08-12 18:42:03 +02004761 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
4762
Willy Tarreauea18f862018-12-22 20:19:26 +01004763next_frame:
4764 if (b_data(&h2c->dbuf) - hole < h2c->dfl)
4765 goto leave; // incomplete input frame
4766
4767 /* No END_HEADERS means there's one or more CONTINUATION frames. In
4768 * this case, we'll try to paste it immediately after the initial
4769 * HEADERS frame payload and kill any possible padding. The initial
4770 * frame's length will be increased to represent the concatenation
4771 * of the two frames. The next frame is read from position <tlen>
4772 * and written at position <flen> (minus padding if some is present).
4773 */
4774 if (unlikely(!(h2c->dff & H2_F_HEADERS_END_HEADERS))) {
4775 struct h2_fh hdr;
4776 int clen; // CONTINUATION frame's payload length
4777
Willy Tarreau7838a792019-08-12 18:42:03 +02004778 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 +01004779 if (!h2_peek_frame_hdr(&h2c->dbuf, h2c->dfl + hole, &hdr)) {
4780 /* no more data, the buffer may be full, either due to
4781 * too large a frame or because of too large a hole that
4782 * we're going to compact at the end.
4783 */
4784 goto leave;
4785 }
4786
4787 if (hdr.ft != H2_FT_CONTINUATION) {
4788 /* RFC7540#6.10: frame of unexpected type */
Willy Tarreau7838a792019-08-12 18:42:03 +02004789 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 +01004790 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004791 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreauea18f862018-12-22 20:19:26 +01004792 goto fail;
4793 }
4794
4795 if (hdr.sid != h2c->dsi) {
4796 /* RFC7540#6.10: frame of different stream */
Willy Tarreau7838a792019-08-12 18:42:03 +02004797 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 +01004798 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004799 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreauea18f862018-12-22 20:19:26 +01004800 goto fail;
4801 }
4802
4803 if ((unsigned)hdr.len > (unsigned)global.tune.bufsize) {
4804 /* RFC7540#4.2: invalid frame length */
Willy Tarreau7838a792019-08-12 18:42:03 +02004805 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 +01004806 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4807 goto fail;
4808 }
4809
4810 /* detect when we must stop aggragating frames */
4811 h2c->dff |= hdr.ff & H2_F_HEADERS_END_HEADERS;
4812
4813 /* Take as much as we can of the CONTINUATION frame's payload */
4814 clen = b_data(&h2c->dbuf) - (h2c->dfl + hole + 9);
4815 if (clen > hdr.len)
4816 clen = hdr.len;
4817
4818 /* Move the frame's payload over the padding, hole and frame
4819 * header. At least one of hole or dpl is null (see diagrams
4820 * above). The hole moves after the new aggragated frame.
4821 */
4822 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 +02004823 h2c->dfl += hdr.len - h2c->dpl;
Willy Tarreauea18f862018-12-22 20:19:26 +01004824 hole += h2c->dpl + 9;
4825 h2c->dpl = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004826 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 +01004827 goto next_frame;
4828 }
4829
4830 flen = h2c->dfl - h2c->dpl;
Willy Tarreau68472622017-12-11 18:36:37 +01004831
Willy Tarreau13278b42017-10-13 19:23:14 +02004832 /* if the input buffer wraps, take a temporary copy of it (rare) */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004833 wrap = b_wrap(&h2c->dbuf) - b_head(&h2c->dbuf);
Willy Tarreau13278b42017-10-13 19:23:14 +02004834 if (wrap < h2c->dfl) {
Willy Tarreau68dd9852017-07-03 14:44:26 +02004835 copy = alloc_trash_chunk();
4836 if (!copy) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004837 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 +02004838 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
4839 goto fail;
4840 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004841 memcpy(copy->area, b_head(&h2c->dbuf), wrap);
4842 memcpy(copy->area + wrap, b_orig(&h2c->dbuf), h2c->dfl - wrap);
4843 hdrs = (uint8_t *) copy->area;
Willy Tarreau13278b42017-10-13 19:23:14 +02004844 }
4845
Willy Tarreau13278b42017-10-13 19:23:14 +02004846 /* Skip StreamDep and weight for now (we don't support PRIORITY) */
4847 if (h2c->dff & H2_F_HEADERS_PRIORITY) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004848 if (read_n32(hdrs) == h2c->dsi) {
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004849 /* RFC7540#5.3.1 : stream dep may not depend on itself */
Willy Tarreau7838a792019-08-12 18:42:03 +02004850 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 +01004851 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004852 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreaua0d11b62018-09-05 18:30:05 +02004853 goto fail;
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004854 }
4855
Willy Tarreaua01f45e2018-12-31 07:41:24 +01004856 if (flen < 5) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004857 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 +01004858 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4859 goto fail;
4860 }
4861
Willy Tarreau13278b42017-10-13 19:23:14 +02004862 hdrs += 5; // stream dep = 4, weight = 1
4863 flen -= 5;
4864 }
4865
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004866 if (!h2_get_buf(h2c, rxbuf)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004867 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 +01004868 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau86277d42019-01-02 15:36:11 +01004869 goto leave;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004870 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004871
Willy Tarreau937f7602018-02-26 15:22:17 +01004872 /* we can't retry a failed decompression operation so we must be very
4873 * careful not to take any risks. In practice the output buffer is
4874 * always empty except maybe for trailers, in which case we simply have
4875 * to wait for the upper layer to finish consuming what is available.
4876 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004877 htx = htx_from_buf(rxbuf);
4878 if (!htx_is_empty(htx)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004879 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 +02004880 h2c->flags |= H2_CF_DEM_SFULL;
4881 goto leave;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004882 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004883
Willy Tarreau25919232019-01-03 14:48:18 +01004884 /* past this point we cannot roll back in case of error */
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004885 outlen = hpack_decode_frame(h2c->ddht, hdrs, flen, list,
4886 sizeof(list)/sizeof(list[0]), tmp);
4887 if (outlen < 0) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004888 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 +01004889 h2c_error(h2c, H2_ERR_COMPRESSION_ERROR);
4890 goto fail;
4891 }
4892
Willy Tarreau25919232019-01-03 14:48:18 +01004893 /* The PACK decompressor was updated, let's update the input buffer and
4894 * the parser's state to commit these changes and allow us to later
4895 * fail solely on the stream if needed.
4896 */
4897 b_del(&h2c->dbuf, h2c->dfl + hole);
4898 h2c->dfl = hole = 0;
4899 h2c->st0 = H2_CS_FRAME_H;
4900
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004901 /* OK now we have our header list in <list> */
Willy Tarreau880f5802019-01-03 08:10:14 +01004902 msgf = (h2c->dff & H2_F_HEADERS_END_STREAM) ? 0 : H2_MSGF_BODY;
Christopher Fauletd0db4232021-01-22 11:46:30 +01004903 msgf |= (*flags & H2_SF_BODY_TUNNEL) ? H2_MSGF_BODY_TUNNEL: 0;
Amaury Denoyelle74162742020-12-11 17:53:05 +01004904 /* If an Extended CONNECT has been sent on this stream, set message flag
Ilya Shipitsinacf84592021-02-06 22:29:08 +05004905 * to convert 200 response to 101 htx response */
Amaury Denoyelle74162742020-12-11 17:53:05 +01004906 msgf |= (*flags & H2_SF_EXT_CONNECT_SENT) ? H2_MSGF_EXT_CONNECT: 0;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004907
Willy Tarreau88d138e2019-01-02 19:38:14 +01004908 if (*flags & H2_SF_HEADERS_RCVD)
4909 goto trailers;
4910
4911 /* This is the first HEADERS frame so it's a headers block */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004912 if (h2c->flags & H2_CF_IS_BACK)
Amaury Denoyelle74162742020-12-11 17:53:05 +01004913 outlen = h2_make_htx_response(list, htx, &msgf, body_len, upgrade_protocol);
Christopher Faulet9b79a102019-07-15 11:22:56 +02004914 else
4915 outlen = h2_make_htx_request(list, htx, &msgf, body_len);
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004916
Christopher Faulet3d875582021-04-26 17:46:13 +02004917 if (outlen < 0 || htx_free_space(htx) < global.tune.maxrewrite) {
Willy Tarreau25919232019-01-03 14:48:18 +01004918 /* too large headers? this is a stream error only */
Christopher Faulet3d875582021-04-26 17:46:13 +02004919 TRACE_STATE("message headers too large", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2S_ERR|H2_EV_PROTO_ERR, h2c->conn);
4920 htx->flags |= HTX_FL_PARSING_ERROR;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004921 goto fail;
4922 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004923
Willy Tarreau174b06a2018-04-25 18:13:58 +02004924 if (msgf & H2_MSGF_BODY) {
4925 /* a payload is present */
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004926 if (msgf & H2_MSGF_BODY_CL) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004927 *flags |= H2_SF_DATA_CLEN;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004928 htx->extra = *body_len;
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004929 }
Willy Tarreau174b06a2018-04-25 18:13:58 +02004930 }
Christopher Faulet7d247f02020-12-02 14:26:36 +01004931 if (msgf & H2_MSGF_BODYLESS_RSP)
4932 *flags |= H2_SF_BODYLESS_RESP;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004933
Christopher Fauletd0db4232021-01-22 11:46:30 +01004934 if (msgf & H2_MSGF_BODY_TUNNEL)
4935 *flags |= H2_SF_BODY_TUNNEL;
4936 else {
4937 /* Abort the tunnel attempt, if any */
4938 if (*flags & H2_SF_BODY_TUNNEL)
4939 *flags |= H2_SF_TUNNEL_ABRT;
4940 *flags &= ~H2_SF_BODY_TUNNEL;
4941 }
4942
Willy Tarreau88d138e2019-01-02 19:38:14 +01004943 done:
Christopher Faulet0b465482019-02-19 15:14:23 +01004944 /* indicate that a HEADERS frame was received for this stream, except
4945 * for 1xx responses. For 1xx responses, another HEADERS frame is
4946 * expected.
4947 */
4948 if (!(msgf & H2_MSGF_RSP_1XX))
4949 *flags |= H2_SF_HEADERS_RCVD;
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004950
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004951 if (h2c->dff & H2_F_HEADERS_END_STREAM) {
Christopher Faulet2c681c62022-12-22 09:47:01 +01004952 if (msgf & H2_MSGF_RSP_1XX) {
4953 /* RFC9113#8.1 : HEADERS frame with the ES flag set that carries an informational status code is malformed */
4954 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);
4955 goto fail;
4956 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004957 /* no more data are expected for this message */
4958 htx->flags |= HTX_FL_EOM;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004959 }
Willy Tarreau937f7602018-02-26 15:22:17 +01004960
Amaury Denoyelleefe22762020-12-11 17:53:08 +01004961 if (msgf & H2_MSGF_EXT_CONNECT)
4962 *flags |= H2_SF_EXT_CONNECT_RCVD;
4963
Willy Tarreau86277d42019-01-02 15:36:11 +01004964 /* success */
4965 ret = 1;
4966
Willy Tarreau68dd9852017-07-03 14:44:26 +02004967 leave:
Willy Tarreau86277d42019-01-02 15:36:11 +01004968 /* If there is a hole left and it's not at the end, we are forced to
Willy Tarreauea18f862018-12-22 20:19:26 +01004969 * move the remaining data over it.
4970 */
4971 if (hole) {
4972 if (b_data(&h2c->dbuf) > h2c->dfl + hole)
4973 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole),
4974 b_data(&h2c->dbuf) - (h2c->dfl + hole), -hole);
4975 b_sub(&h2c->dbuf, hole);
4976 }
4977
Christopher Faulet07f88d72021-04-21 10:39:53 +02004978 if (b_full(&h2c->dbuf) && h2c->dfl) {
Willy Tarreauea18f862018-12-22 20:19:26 +01004979 /* too large frames */
4980 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau86277d42019-01-02 15:36:11 +01004981 ret = -1;
Willy Tarreauea18f862018-12-22 20:19:26 +01004982 }
4983
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004984 if (htx)
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004985 htx_to_buf(htx, rxbuf);
Willy Tarreau68dd9852017-07-03 14:44:26 +02004986 free_trash_chunk(copy);
Willy Tarreau7838a792019-08-12 18:42:03 +02004987 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau86277d42019-01-02 15:36:11 +01004988 return ret;
4989
Willy Tarreau68dd9852017-07-03 14:44:26 +02004990 fail:
Willy Tarreau86277d42019-01-02 15:36:11 +01004991 ret = -1;
Willy Tarreau68dd9852017-07-03 14:44:26 +02004992 goto leave;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004993
4994 trailers:
4995 /* This is the last HEADERS frame hence a trailer */
Willy Tarreau88d138e2019-01-02 19:38:14 +01004996 if (!(h2c->dff & H2_F_HEADERS_END_STREAM)) {
4997 /* It's a trailer but it's missing ES flag */
Willy Tarreau7838a792019-08-12 18:42:03 +02004998 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 +01004999 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02005000 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau88d138e2019-01-02 19:38:14 +01005001 goto fail;
5002 }
5003
Christopher Faulet9b79a102019-07-15 11:22:56 +02005004 /* Trailers terminate a DATA sequence */
Willy Tarreau7838a792019-08-12 18:42:03 +02005005 if (h2_make_htx_trailers(list, htx) <= 0) {
5006 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 +02005007 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005008 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01005009 goto done;
Willy Tarreau13278b42017-10-13 19:23:14 +02005010}
5011
Christopher Faulet9b79a102019-07-15 11:22:56 +02005012/* Transfer the payload of a DATA frame to the HTTP/1 side. The HTTP/2 frame
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005013 * parser state is automatically updated. Returns > 0 if it could completely
5014 * send the current frame, 0 if it couldn't complete, in which case
5015 * CS_FL_RCV_MORE must be checked to know if some data remain pending (an empty
5016 * DATA frame can return 0 as a valid result). Stream errors are reported in
5017 * h2s->errcode and connection errors in h2c->errcode. The caller must already
5018 * have checked the frame header and ensured that the frame was complete or the
5019 * buffer full. It changes the frame state to FRAME_A once done.
Willy Tarreau454f9052017-10-26 19:40:35 +02005020 */
Willy Tarreau454b57b2018-02-26 15:50:05 +01005021static int h2_frt_transfer_data(struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02005022{
5023 struct h2c *h2c = h2s->h2c;
Christopher Faulet9b79a102019-07-15 11:22:56 +02005024 int block;
Willy Tarreaud755ea62018-02-26 15:44:54 +01005025 unsigned int flen = 0;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005026 struct htx *htx = NULL;
Willy Tarreaud755ea62018-02-26 15:44:54 +01005027 struct buffer *csbuf;
Christopher Faulet9b79a102019-07-15 11:22:56 +02005028 unsigned int sent;
Willy Tarreau454f9052017-10-26 19:40:35 +02005029
Willy Tarreau7838a792019-08-12 18:42:03 +02005030 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
5031
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005032 h2c->flags &= ~H2_CF_DEM_SFULL;
Willy Tarreau454f9052017-10-26 19:40:35 +02005033
Olivier Houchard638b7992018-08-16 15:41:52 +02005034 csbuf = h2_get_buf(h2c, &h2s->rxbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01005035 if (!csbuf) {
5036 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02005037 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 +01005038 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01005039 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02005040 htx = htx_from_buf(csbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01005041
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005042try_again:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005043 flen = h2c->dfl - h2c->dpl;
5044 if (!flen)
Willy Tarreau4a28da12018-01-04 14:41:00 +01005045 goto end_transfer;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005046
Willy Tarreauc9fa0482018-07-10 17:43:27 +02005047 if (flen > b_data(&h2c->dbuf)) {
5048 flen = b_data(&h2c->dbuf);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005049 if (!flen)
Willy Tarreau454b57b2018-02-26 15:50:05 +01005050 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01005051 }
5052
Christopher Faulet9b79a102019-07-15 11:22:56 +02005053 block = htx_free_data_space(htx);
5054 if (!block) {
5055 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005056 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 +02005057 goto fail;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005058 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02005059 if (flen > block)
5060 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005061
Christopher Faulet9b79a102019-07-15 11:22:56 +02005062 /* here, flen is the max we can copy into the output buffer */
5063 block = b_contig_data(&h2c->dbuf, 0);
5064 if (flen > block)
5065 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005066
Christopher Faulet9b79a102019-07-15 11:22:56 +02005067 sent = htx_add_data(htx, ist2(b_head(&h2c->dbuf), flen));
Willy Tarreau022e5e52020-09-10 09:33:15 +02005068 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 +02005069
Christopher Faulet9b79a102019-07-15 11:22:56 +02005070 b_del(&h2c->dbuf, sent);
5071 h2c->dfl -= sent;
5072 h2c->rcvd_c += sent;
5073 h2c->rcvd_s += sent; // warning, this can also affect the closed streams!
Willy Tarreau454f9052017-10-26 19:40:35 +02005074
Christopher Faulet9b79a102019-07-15 11:22:56 +02005075 if (h2s->flags & H2_SF_DATA_CLEN) {
5076 h2s->body_len -= sent;
5077 htx->extra = h2s->body_len;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005078 }
5079
Christopher Faulet9b79a102019-07-15 11:22:56 +02005080 if (sent < flen) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01005081 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005082 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 +01005083 goto fail;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005084 }
5085
Christopher Faulet9b79a102019-07-15 11:22:56 +02005086 goto try_again;
5087
Willy Tarreau4a28da12018-01-04 14:41:00 +01005088 end_transfer:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005089 /* here we're done with the frame, all the payload (except padding) was
5090 * transferred.
5091 */
Willy Tarreaueba10f22018-04-25 20:44:22 +02005092
Christopher Faulet5be651d2021-01-22 15:28:03 +01005093 if (!(h2s->flags & H2_SF_BODY_TUNNEL) && (h2c->dff & H2_F_DATA_END_STREAM)) {
5094 /* no more data are expected for this message. This add the EOM
5095 * flag but only on the response path or if no tunnel attempt
5096 * was aborted. Otherwise (request path + tunnel abrted), the
5097 * EOM was already reported.
5098 */
Christopher Faulet33724322021-02-10 09:04:59 +01005099 if ((h2c->flags & H2_CF_IS_BACK) || !(h2s->flags & H2_SF_TUNNEL_ABRT)) {
5100 /* If we receive an empty DATA frame with ES flag while the HTX
5101 * message is empty, we must be sure to push a block to be sure
5102 * the HTX EOM flag will be handled on the other side. It is a
5103 * workaround because for now it is not possible to push empty
5104 * HTX DATA block. And without this block, there is no way to
5105 * "commit" the end of the message.
5106 */
5107 if (htx_is_empty(htx)) {
5108 if (!htx_add_endof(htx, HTX_BLK_EOT))
5109 goto fail;
5110 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005111 htx->flags |= HTX_FL_EOM;
Christopher Faulet33724322021-02-10 09:04:59 +01005112 }
Willy Tarreaueba10f22018-04-25 20:44:22 +02005113 }
5114
Willy Tarreaud1023bb2018-03-22 16:53:12 +01005115 h2c->rcvd_c += h2c->dpl;
5116 h2c->rcvd_s += h2c->dpl;
5117 h2c->dpl = 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02005118 h2c->st0 = H2_CS_FRAME_A; // send the corresponding window update
Christopher Faulet9b79a102019-07-15 11:22:56 +02005119 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02005120 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005121 return 1;
Willy Tarreau454b57b2018-02-26 15:50:05 +01005122 fail:
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005123 if (htx)
5124 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 Tarreau454b57b2018-02-26 15:50:05 +01005126 return 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02005127}
5128
Willy Tarreau115e83b2018-12-01 19:17:53 +01005129/* Try to send a HEADERS frame matching HTX response present in HTX message
5130 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
5131 * must check the stream's status to detect any error which might have happened
5132 * subsequently to a successful send. The htx blocks are automatically removed
5133 * from the message. The htx message is assumed to be valid since produced from
5134 * the internal code, hence it contains a start line, an optional series of
5135 * header blocks and an end of header, otherwise an invalid frame could be
5136 * emitted and the resulting htx message could be left in an inconsistent state.
5137 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005138static size_t h2s_frt_make_resp_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005139{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005140 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau115e83b2018-12-01 19:17:53 +01005141 struct h2c *h2c = h2s->h2c;
5142 struct htx_blk *blk;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005143 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005144 struct buffer *mbuf;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005145 struct htx_sl *sl;
5146 enum htx_blk_type type;
5147 int es_now = 0;
5148 int ret = 0;
5149 int hdr;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005150
Willy Tarreau7838a792019-08-12 18:42:03 +02005151 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5152
Willy Tarreau115e83b2018-12-01 19:17:53 +01005153 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005154 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005155 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005156 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005157 return 0;
5158 }
5159
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005160 /* get the start line (we do have one) and the rest of the headers,
5161 * that we dump starting at header 0 */
5162 sl = NULL;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005163 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005164 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau115e83b2018-12-01 19:17:53 +01005165 type = htx_get_blk_type(blk);
5166
5167 if (type == HTX_BLK_UNUSED)
5168 continue;
5169
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005170 if (type == HTX_BLK_EOH)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005171 break;
5172
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005173 if (type == HTX_BLK_HDR) {
Christopher Faulet56498132021-01-29 11:39:43 +01005174 BUG_ON(!sl); /* The start-line mut be defined before any headers */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005175 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5176 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5177 goto fail;
5178 }
5179
5180 list[hdr].n = htx_get_blk_name(htx, blk);
5181 list[hdr].v = htx_get_blk_value(htx, blk);
5182 hdr++;
5183 }
5184 else if (type == HTX_BLK_RES_SL) {
Christopher Faulet56498132021-01-29 11:39:43 +01005185 BUG_ON(sl); /* Only one start-line expected */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005186 sl = htx_get_blk_ptr(htx, blk);
5187 h2s->status = sl->info.res.status;
Christopher Faulet7d247f02020-12-02 14:26:36 +01005188 if (h2s->status == 204 || h2s->status == 304)
5189 h2s->flags |= H2_SF_BODYLESS_RESP;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005190 if (h2s->status < 100 || h2s->status > 999) {
5191 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5192 goto fail;
5193 }
5194 else if (h2s->status == 101) {
Amaury Denoyelleefe22762020-12-11 17:53:08 +01005195 if (unlikely(h2s->flags & H2_SF_EXT_CONNECT_RCVD)) {
5196 /* If an Extended CONNECT has been received, we need to convert 101 to 200 */
5197 h2s->status = 200;
5198 h2s->flags &= ~H2_SF_EXT_CONNECT_RCVD;
5199 }
5200 else {
5201 /* Otherwise, 101 responses are not supported in H2, so return a error (RFC7540#8.1.1) */
5202 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5203 goto fail;
5204 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005205 }
5206 else if ((h2s->flags & H2_SF_BODY_TUNNEL) && h2s->status >= 300) {
5207 /* Abort the tunnel attempt */
5208 h2s->flags &= ~H2_SF_BODY_TUNNEL;
5209 h2s->flags |= H2_SF_TUNNEL_ABRT;
5210 }
5211 }
5212 else {
5213 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 +01005214 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005215 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005216 }
5217
Christopher Faulet56498132021-01-29 11:39:43 +01005218 /* The start-line me be defined */
5219 BUG_ON(!sl);
5220
Willy Tarreau115e83b2018-12-01 19:17:53 +01005221 /* marker for end of headers */
5222 list[hdr].n = ist("");
5223
Willy Tarreau9c218e72019-05-26 10:08:28 +02005224 mbuf = br_tail(h2c->mbuf);
5225 retry:
5226 if (!h2_get_buf(h2c, mbuf)) {
5227 h2c->flags |= H2_CF_MUX_MALLOC;
5228 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005229 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 +02005230 return 0;
5231 }
5232
Willy Tarreau115e83b2018-12-01 19:17:53 +01005233 chunk_reset(&outbuf);
5234
5235 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005236 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5237 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005238 break;
5239 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005240 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau115e83b2018-12-01 19:17:53 +01005241 }
5242
5243 if (outbuf.size < 9)
5244 goto full;
5245
5246 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5247 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5248 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5249 outbuf.data = 9;
5250
Willy Tarreau8a4dca02022-01-13 16:00:12 +01005251 if ((h2c->flags & (H2_CF_SHTS_UPDATED|H2_CF_DTSU_EMITTED)) == H2_CF_SHTS_UPDATED) {
5252 /* SETTINGS_HEADER_TABLE_SIZE changed, we must send an HPACK
5253 * dynamic table size update so that some clients are not
5254 * confused. In practice we only need to send the DTSU when the
5255 * advertised size is lower than the current one, and since we
5256 * don't use it and don't care about the default 4096 bytes,
5257 * we only ack it with a zero size thus we at most have to deal
5258 * with this once. See RFC7541#4.2 and #6.3 for the spec, and
5259 * below for the whole context and interoperability risks:
5260 * https://lists.w3.org/Archives/Public/ietf-http-wg/2021OctDec/0235.html
5261 */
5262 if (b_room(&outbuf) < 1)
5263 goto full;
5264 outbuf.area[outbuf.data++] = 0x20; // HPACK DTSU 0 bytes
5265
5266 /* let's not update the flags now but only once the buffer is
5267 * really committed.
5268 */
5269 }
5270
Willy Tarreau115e83b2018-12-01 19:17:53 +01005271 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01005272 if (!hpack_encode_int_status(&outbuf, h2s->status)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005273 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005274 goto realign_again;
5275 goto full;
5276 }
5277
5278 /* encode all headers, stop at empty name */
5279 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
5280 /* these ones do not exist in H2 and must be dropped. */
5281 if (isteq(list[hdr].n, ist("connection")) ||
5282 isteq(list[hdr].n, ist("proxy-connection")) ||
5283 isteq(list[hdr].n, ist("keep-alive")) ||
5284 isteq(list[hdr].n, ist("upgrade")) ||
5285 isteq(list[hdr].n, ist("transfer-encoding")))
5286 continue;
5287
Christopher Faulet86d144c2019-08-14 16:32:25 +02005288 /* Skip all pseudo-headers */
5289 if (*(list[hdr].n.ptr) == ':')
5290 continue;
5291
Willy Tarreau115e83b2018-12-01 19:17:53 +01005292 if (isteq(list[hdr].n, ist("")))
5293 break; // end
5294
5295 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
5296 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005297 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005298 goto realign_again;
5299 goto full;
5300 }
5301 }
5302
Willy Tarreaucb985a42019-10-07 16:56:34 +02005303 /* update the frame's size */
5304 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5305
5306 if (outbuf.data > h2c->mfs + 9) {
5307 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5308 /* output full */
5309 if (b_space_wraps(mbuf))
5310 goto realign_again;
5311 goto full;
5312 }
5313 }
5314
Willy Tarreau38b5bec2021-06-17 08:40:04 +02005315 TRACE_USER("sent H2 response ", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
5316
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005317 /* remove all header blocks including the EOH and compute the
5318 * corresponding size.
Willy Tarreau115e83b2018-12-01 19:17:53 +01005319 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005320 ret = 0;
5321 blk = htx_get_head_blk(htx);
5322 while (blk) {
5323 type = htx_get_blk_type(blk);
5324 ret += htx_get_blksz(blk);
5325 blk = htx_remove_blk(htx, blk);
5326 /* The removed block is the EOH */
5327 if (type == HTX_BLK_EOH)
5328 break;
Christopher Faulet5be651d2021-01-22 15:28:03 +01005329 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005330
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005331 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW) {
5332 /* Response already closed: add END_STREAM */
5333 es_now = 1;
5334 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005335 else if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx) && h2s->status >= 200) {
5336 /* EOM+empty: we may need to add END_STREAM except for 1xx
Christopher Faulet991febd2020-12-02 15:17:31 +01005337 * responses and tunneled response.
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005338 */
Christopher Faulet991febd2020-12-02 15:17:31 +01005339 if (!(h2s->flags & H2_SF_BODY_TUNNEL) || h2s->status >= 300)
5340 es_now = 1;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005341 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005342
Willy Tarreau115e83b2018-12-01 19:17:53 +01005343 if (es_now)
5344 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5345
5346 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005347 b_add(mbuf, outbuf.data);
Christopher Faulet0b465482019-02-19 15:14:23 +01005348
5349 /* indicates the HEADERS frame was sent, except for 1xx responses. For
5350 * 1xx responses, another HEADERS frame is expected.
5351 */
Christopher Faulet89899422020-12-07 18:24:43 +01005352 if (h2s->status >= 200)
Christopher Faulet0b465482019-02-19 15:14:23 +01005353 h2s->flags |= H2_SF_HEADERS_SENT;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005354
Willy Tarreau8a4dca02022-01-13 16:00:12 +01005355 if (h2c->flags & H2_CF_SHTS_UPDATED) {
5356 /* was sent above */
5357 h2c->flags |= H2_CF_DTSU_EMITTED;
Willy Tarreaub05f4dd2022-02-16 14:28:14 +01005358 h2c->flags &= ~H2_CF_SHTS_UPDATED;
Willy Tarreau8a4dca02022-01-13 16:00:12 +01005359 }
5360
Willy Tarreau115e83b2018-12-01 19:17:53 +01005361 if (es_now) {
5362 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005363 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 +01005364 if (h2s->st == H2_SS_OPEN)
5365 h2s->st = H2_SS_HLOC;
5366 else
5367 h2s_close(h2s);
5368 }
5369
5370 /* OK we could properly deliver the response */
Willy Tarreau115e83b2018-12-01 19:17:53 +01005371 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005372 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005373 return ret;
5374 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005375 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5376 goto retry;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005377 h2c->flags |= H2_CF_MUX_MFULL;
5378 h2s->flags |= H2_SF_BLK_MROOM;
5379 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005380 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 +01005381 goto end;
5382 fail:
5383 /* unparsable HTX messages, too large ones to be produced in the local
5384 * list etc go here (unrecoverable errors).
5385 */
5386 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5387 ret = 0;
5388 goto end;
5389}
5390
Willy Tarreau80739692018-10-05 11:35:57 +02005391/* Try to send a HEADERS frame matching HTX request present in HTX message
5392 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
5393 * must check the stream's status to detect any error which might have happened
5394 * subsequently to a successful send. The htx blocks are automatically removed
5395 * from the message. The htx message is assumed to be valid since produced from
5396 * the internal code, hence it contains a start line, an optional series of
5397 * header blocks and an end of header, otherwise an invalid frame could be
5398 * emitted and the resulting htx message could be left in an inconsistent state.
5399 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005400static size_t h2s_bck_make_req_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau80739692018-10-05 11:35:57 +02005401{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005402 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau80739692018-10-05 11:35:57 +02005403 struct h2c *h2c = h2s->h2c;
5404 struct htx_blk *blk;
Willy Tarreau80739692018-10-05 11:35:57 +02005405 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005406 struct buffer *mbuf;
Willy Tarreau80739692018-10-05 11:35:57 +02005407 struct htx_sl *sl;
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005408 struct ist meth, uri, auth, host = IST_NULL;
Willy Tarreau80739692018-10-05 11:35:57 +02005409 enum htx_blk_type type;
5410 int es_now = 0;
5411 int ret = 0;
5412 int hdr;
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005413 int extended_connect = 0;
Willy Tarreau80739692018-10-05 11:35:57 +02005414
Willy Tarreau7838a792019-08-12 18:42:03 +02005415 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5416
Willy Tarreau80739692018-10-05 11:35:57 +02005417 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005418 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02005419 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005420 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02005421 return 0;
5422 }
5423
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005424 /* get the start line (we do have one) and the rest of the headers,
5425 * that we dump starting at header 0 */
5426 sl = NULL;
Willy Tarreau80739692018-10-05 11:35:57 +02005427 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005428 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005429 type = htx_get_blk_type(blk);
5430
5431 if (type == HTX_BLK_UNUSED)
5432 continue;
5433
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005434 if (type == HTX_BLK_EOH)
Willy Tarreau80739692018-10-05 11:35:57 +02005435 break;
5436
Christopher Fauletc29b4bf2021-01-29 11:49:16 +01005437 if (type == HTX_BLK_HDR) {
Christopher Faulet56498132021-01-29 11:39:43 +01005438 BUG_ON(!sl); /* The start-line mut be defined before any headers */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005439 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5440 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5441 goto fail;
5442 }
Willy Tarreau80739692018-10-05 11:35:57 +02005443
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005444 list[hdr].n = htx_get_blk_name(htx, blk);
5445 list[hdr].v = htx_get_blk_value(htx, blk);
Christopher Faulet67d58092019-10-02 10:51:38 +02005446
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005447 /* Skip header if same name is used to add the server name */
5448 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name &&
5449 isteq(list[hdr].n, ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len)))
5450 continue;
Christopher Faulet67d58092019-10-02 10:51:38 +02005451
Ilya Shipitsinacf84592021-02-06 22:29:08 +05005452 /* Convert connection: upgrade to Extended connect from rfc 8441 */
Christopher Faulet673504a2021-09-09 09:52:51 +02005453 if ((sl->flags & HTX_SL_F_CONN_UPG) && isteqi(list[hdr].n, ist("connection"))) {
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005454 /* rfc 7230 #6.1 Connection = list of tokens */
5455 struct ist connection_ist = list[hdr].v;
5456 do {
5457 if (isteqi(iststop(connection_ist, ','),
5458 ist("upgrade"))) {
Amaury Denoyelle68993a12021-10-18 09:43:29 +02005459 if (!(h2c->flags & H2_CF_RCVD_RFC8441)) {
5460 TRACE_STATE("reject upgrade because of no RFC8441 support", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5461 goto fail;
5462 }
5463
Amaury Denoyellea1fa1542021-10-18 10:05:16 +02005464 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 +01005465 h2s->flags |= (H2_SF_BODY_TUNNEL|H2_SF_EXT_CONNECT_SENT);
5466 sl->info.req.meth = HTTP_METH_CONNECT;
5467 meth = ist("CONNECT");
5468
5469 extended_connect = 1;
5470 break;
5471 }
5472
5473 connection_ist = istadv(istfind(connection_ist, ','), 1);
5474 } while (istlen(connection_ist));
5475 }
5476
Christopher Faulet673504a2021-09-09 09:52:51 +02005477 if ((sl->flags & HTX_SL_F_CONN_UPG) && isteq(list[hdr].n, ist("upgrade"))) {
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005478 /* rfc 7230 #6.7 Upgrade = list of protocols
5479 * rfc 8441 #4 Extended connect = :protocol is single-valued
5480 *
5481 * only first HTTP/1 protocol is preserved
5482 */
5483 const struct ist protocol = iststop(list[hdr].v, ',');
5484 /* upgrade_protocol field is 16 bytes long in h2s */
5485 istpad(h2s->upgrade_protocol, isttrim(protocol, 15));
5486 }
5487
5488 if (isteq(list[hdr].n, ist("host")))
5489 host = list[hdr].v;
5490
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005491 hdr++;
5492 }
Christopher Fauletc29b4bf2021-01-29 11:49:16 +01005493 else if (type == HTX_BLK_REQ_SL) {
5494 BUG_ON(sl); /* Only one start-line expected */
5495 sl = htx_get_blk_ptr(htx, blk);
5496 meth = htx_sl_req_meth(sl);
5497 uri = htx_sl_req_uri(sl);
5498 if (sl->info.req.meth == HTTP_METH_HEAD)
5499 h2s->flags |= H2_SF_BODYLESS_RESP;
5500 if (unlikely(uri.len == 0)) {
5501 TRACE_ERROR("no URI in HTX request", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5502 goto fail;
5503 }
5504 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005505 else {
5506 TRACE_ERROR("will not encode unexpected htx block", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5507 goto fail;
5508 }
Willy Tarreau80739692018-10-05 11:35:57 +02005509 }
5510
Christopher Faulet56498132021-01-29 11:39:43 +01005511 /* The start-line me be defined */
5512 BUG_ON(!sl);
5513
Christopher Faulet72ba6cd2019-09-24 16:20:05 +02005514 /* Now add the server name to a header (if requested) */
5515 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name) {
5516 struct server *srv = objt_server(h2c->conn->target);
5517
5518 if (srv) {
5519 list[hdr].n = ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len);
5520 list[hdr].v = ist(srv->id);
5521 hdr++;
5522 }
5523 }
5524
Willy Tarreau80739692018-10-05 11:35:57 +02005525 /* marker for end of headers */
5526 list[hdr].n = ist("");
5527
Willy Tarreau9c218e72019-05-26 10:08:28 +02005528 mbuf = br_tail(h2c->mbuf);
5529 retry:
5530 if (!h2_get_buf(h2c, mbuf)) {
5531 h2c->flags |= H2_CF_MUX_MALLOC;
5532 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005533 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 +02005534 return 0;
5535 }
5536
Willy Tarreau80739692018-10-05 11:35:57 +02005537 chunk_reset(&outbuf);
5538
5539 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005540 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5541 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005542 break;
5543 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005544 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau80739692018-10-05 11:35:57 +02005545 }
5546
5547 if (outbuf.size < 9)
5548 goto full;
5549
5550 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5551 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5552 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5553 outbuf.data = 9;
5554
5555 /* encode the method, which necessarily is the first one */
Willy Tarreaubdabc3a2018-12-10 18:25:11 +01005556 if (!hpack_encode_method(&outbuf, sl->info.req.meth, meth)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005557 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005558 goto realign_again;
5559 goto full;
5560 }
5561
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005562 auth = ist(NULL);
5563
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005564 /* RFC7540 #8.3: the CONNECT method must have :
5565 * - :authority set to the URI part (host:port)
5566 * - :method set to CONNECT
5567 * - :scheme and :path omitted
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005568 *
5569 * Note that this is not applicable in case of the Extended CONNECT
5570 * protocol from rfc 8441.
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005571 */
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005572 if (unlikely(sl->info.req.meth == HTTP_METH_CONNECT) && !extended_connect) {
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005573 auth = uri;
5574
5575 if (!hpack_encode_header(&outbuf, ist(":authority"), auth)) {
5576 /* output full */
5577 if (b_space_wraps(mbuf))
5578 goto realign_again;
5579 goto full;
5580 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005581 h2s->flags |= H2_SF_BODY_TUNNEL;
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005582 } else {
5583 /* other methods need a :scheme. If an authority is known from
5584 * the request line, it must be sent, otherwise only host is
5585 * sent. Host is never sent as the authority.
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005586 *
5587 * This code is also applicable for Extended CONNECT protocol
5588 * from rfc 8441.
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005589 */
5590 struct ist scheme = { };
Christopher Faulet3b44c542019-06-14 10:46:51 +02005591
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005592 if (uri.ptr[0] != '/' && uri.ptr[0] != '*') {
5593 /* the URI seems to start with a scheme */
5594 int len = 1;
5595
5596 while (len < uri.len && uri.ptr[len] != ':')
5597 len++;
5598
5599 if (len + 2 < uri.len && uri.ptr[len + 1] == '/' && uri.ptr[len + 2] == '/') {
5600 /* make the uri start at the authority now */
Tim Duesterhus9f75ed12021-03-02 18:57:26 +01005601 scheme = ist2(uri.ptr, len);
Tim Duesterhus154374c2021-03-02 18:57:27 +01005602 uri = istadv(uri, len + 3);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005603
5604 /* find the auth part of the URI */
Tim Duesterhus92c696e2021-02-28 16:11:36 +01005605 auth = ist2(uri.ptr, 0);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005606 while (auth.len < uri.len && auth.ptr[auth.len] != '/')
5607 auth.len++;
5608
Tim Duesterhus154374c2021-03-02 18:57:27 +01005609 uri = istadv(uri, auth.len);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005610 }
5611 }
5612
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005613 /* For Extended CONNECT, the :authority must be present.
5614 * Use host value for it.
5615 */
5616 if (unlikely(extended_connect) && isttest(host))
5617 auth = host;
5618
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005619 if (!scheme.len) {
5620 /* no explicit scheme, we're using an origin-form URI,
5621 * probably from an H1 request transcoded to H2 via an
5622 * external layer, then received as H2 without authority.
5623 * So we have to look up the scheme from the HTX flags.
5624 * In such a case only http and https are possible, and
5625 * https is the default (sent by browsers).
5626 */
5627 if ((sl->flags & (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP)) == (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP))
5628 scheme = ist("http");
5629 else
5630 scheme = ist("https");
5631 }
Christopher Faulet3b44c542019-06-14 10:46:51 +02005632
5633 if (!hpack_encode_scheme(&outbuf, scheme)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005634 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005635 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005636 goto realign_again;
5637 goto full;
5638 }
Willy Tarreau80739692018-10-05 11:35:57 +02005639
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005640 if (auth.len && !hpack_encode_header(&outbuf, ist(":authority"), auth)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005641 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005642 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005643 goto realign_again;
5644 goto full;
5645 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005646
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005647 /* encode the path. RFC7540#8.1.2.3: if path is empty it must
5648 * be sent as '/' or '*'.
5649 */
5650 if (unlikely(!uri.len)) {
5651 if (sl->info.req.meth == HTTP_METH_OPTIONS)
5652 uri = ist("*");
5653 else
5654 uri = ist("/");
Willy Tarreau053c1572019-02-01 16:13:59 +01005655 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005656
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005657 if (!hpack_encode_path(&outbuf, uri)) {
5658 /* output full */
5659 if (b_space_wraps(mbuf))
5660 goto realign_again;
5661 goto full;
5662 }
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005663
5664 /* encode the pseudo-header protocol from rfc8441 if using
5665 * Extended CONNECT method.
5666 */
5667 if (unlikely(extended_connect)) {
5668 const struct ist protocol = ist(h2s->upgrade_protocol);
5669 if (isttest(protocol)) {
5670 if (!hpack_encode_header(&outbuf,
5671 ist(":protocol"),
5672 protocol)) {
5673 /* output full */
5674 if (b_space_wraps(mbuf))
5675 goto realign_again;
5676 goto full;
5677 }
5678 }
5679 }
Willy Tarreau80739692018-10-05 11:35:57 +02005680 }
5681
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005682 /* encode all headers, stop at empty name. Host is only sent if we
5683 * do not provide an authority.
5684 */
Willy Tarreau80739692018-10-05 11:35:57 +02005685 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005686 struct ist n = list[hdr].n;
5687 struct ist v = list[hdr].v;
5688
Willy Tarreau80739692018-10-05 11:35:57 +02005689 /* these ones do not exist in H2 and must be dropped. */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005690 if (isteq(n, ist("connection")) ||
5691 (auth.len && isteq(n, ist("host"))) ||
5692 isteq(n, ist("proxy-connection")) ||
5693 isteq(n, ist("keep-alive")) ||
5694 isteq(n, ist("upgrade")) ||
5695 isteq(n, ist("transfer-encoding")))
Willy Tarreau80739692018-10-05 11:35:57 +02005696 continue;
5697
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005698 if (isteq(n, ist("te"))) {
5699 /* "te" may only be sent with "trailers" if this value
5700 * is present, otherwise it must be deleted.
5701 */
5702 v = istist(v, ist("trailers"));
Tim Duesterhus7b5777d2021-03-02 18:57:28 +01005703 if (!isttest(v) || (v.len > 8 && v.ptr[8] != ','))
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005704 continue;
5705 v = ist("trailers");
5706 }
5707
Christopher Faulet86d144c2019-08-14 16:32:25 +02005708 /* Skip all pseudo-headers */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005709 if (*(n.ptr) == ':')
Christopher Faulet86d144c2019-08-14 16:32:25 +02005710 continue;
5711
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005712 if (isteq(n, ist("")))
Willy Tarreau80739692018-10-05 11:35:57 +02005713 break; // end
5714
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005715 if (!hpack_encode_header(&outbuf, n, v)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005716 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005717 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005718 goto realign_again;
5719 goto full;
5720 }
5721 }
5722
Willy Tarreaucb985a42019-10-07 16:56:34 +02005723 /* update the frame's size */
5724 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5725
5726 if (outbuf.data > h2c->mfs + 9) {
5727 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5728 /* output full */
5729 if (b_space_wraps(mbuf))
5730 goto realign_again;
5731 goto full;
5732 }
5733 }
5734
Willy Tarreau38b5bec2021-06-17 08:40:04 +02005735 TRACE_USER("sent H2 request ", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
5736
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005737 /* remove all header blocks including the EOH and compute the
5738 * corresponding size.
Willy Tarreau80739692018-10-05 11:35:57 +02005739 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005740 ret = 0;
5741 blk = htx_get_head_blk(htx);
5742 while (blk) {
5743 type = htx_get_blk_type(blk);
5744 ret += htx_get_blksz(blk);
5745 blk = htx_remove_blk(htx, blk);
5746 /* The removed block is the EOH */
5747 if (type == HTX_BLK_EOH)
5748 break;
Christopher Fauletd0db4232021-01-22 11:46:30 +01005749 }
Willy Tarreau80739692018-10-05 11:35:57 +02005750
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005751 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW) {
5752 /* Request already closed: add END_STREAM */
Willy Tarreau80739692018-10-05 11:35:57 +02005753 es_now = 1;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005754 }
5755 if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx)) {
5756 /* EOM+empty: we may need to add END_STREAM (except for CONNECT
5757 * request)
5758 */
5759 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5760 es_now = 1;
5761 }
Willy Tarreau80739692018-10-05 11:35:57 +02005762
Willy Tarreau80739692018-10-05 11:35:57 +02005763 if (es_now)
5764 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5765
5766 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005767 b_add(mbuf, outbuf.data);
Willy Tarreau80739692018-10-05 11:35:57 +02005768 h2s->flags |= H2_SF_HEADERS_SENT;
5769 h2s->st = H2_SS_OPEN;
5770
Willy Tarreau80739692018-10-05 11:35:57 +02005771 if (es_now) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005772 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 +02005773 // trim any possibly pending data (eg: inconsistent content-length)
5774 h2s->flags |= H2_SF_ES_SENT;
5775 h2s->st = H2_SS_HLOC;
5776 }
5777
Willy Tarreau80739692018-10-05 11:35:57 +02005778 end:
5779 return ret;
5780 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005781 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5782 goto retry;
Willy Tarreau80739692018-10-05 11:35:57 +02005783 h2c->flags |= H2_CF_MUX_MFULL;
5784 h2s->flags |= H2_SF_BLK_MROOM;
5785 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005786 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 +02005787 goto end;
5788 fail:
5789 /* unparsable HTX messages, too large ones to be produced in the local
5790 * list etc go here (unrecoverable errors).
5791 */
5792 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5793 ret = 0;
5794 goto end;
5795}
5796
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005797/* Try to send a DATA frame matching HTTP response present in HTX structure
Willy Tarreau98de12a2018-12-12 07:03:00 +01005798 * present in <buf>, for stream <h2s>. Returns the number of bytes sent. The
5799 * caller must check the stream's status to detect any error which might have
5800 * happened subsequently to a successful send. Returns the number of data bytes
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005801 * consumed, or zero if nothing done.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005802 */
Christopher Faulet142854b2020-12-02 15:12:40 +01005803static size_t h2s_make_data(struct h2s *h2s, struct buffer *buf, size_t count)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005804{
5805 struct h2c *h2c = h2s->h2c;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005806 struct htx *htx;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005807 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005808 struct buffer *mbuf;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005809 size_t total = 0;
5810 int es_now = 0;
5811 int bsize; /* htx block size */
5812 int fsize; /* h2 frame size */
5813 struct htx_blk *blk;
5814 enum htx_blk_type type;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005815 int trunc_out; /* non-zero if truncated on out buf */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005816
Willy Tarreau7838a792019-08-12 18:42:03 +02005817 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5818
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005819 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005820 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005821 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005822 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005823 goto end;
5824 }
5825
Willy Tarreau98de12a2018-12-12 07:03:00 +01005826 htx = htx_from_buf(buf);
5827
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005828 /* We only come here with HTX_BLK_DATA blocks */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005829
5830 new_frame:
Willy Tarreauee573762018-12-04 15:25:57 +01005831 if (!count || htx_is_empty(htx))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005832 goto end;
5833
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005834 if ((h2c->flags & H2_CF_IS_BACK) &&
Christopher Fauletf95f8762021-01-22 11:59:07 +01005835 (h2s->flags & (H2_SF_HEADERS_RCVD|H2_SF_BODY_TUNNEL)) == H2_SF_BODY_TUNNEL) {
5836 /* The response HEADERS frame not received yet. Thus the tunnel
5837 * is not fully established yet. In this situation, we block
5838 * data sending.
5839 */
5840 h2s->flags |= H2_SF_BLK_MBUSY;
5841 TRACE_STATE("Request DATA frame blocked waiting for tunnel establishment", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5842 goto end;
5843 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01005844 else if ((h2c->flags & H2_CF_IS_BACK) && (h2s->flags & H2_SF_TUNNEL_ABRT)) {
5845 /* a tunnel attempt was aborted but the is pending raw data to xfer to the server.
5846 * Thus the stream is closed with the CANCEL error. The error will be reported to
5847 * the upper layer as aserver abort. But at this stage there is nothing more we can
5848 * do. We just wait for the end of the response to be sure to not truncate it.
5849 */
5850 if (!(h2s->flags & H2_SF_ES_RCVD)) {
5851 TRACE_STATE("Request DATA frame blocked waiting end of aborted tunnel", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5852 h2s->flags |= H2_SF_BLK_MBUSY;
5853 }
5854 else {
5855 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
5856 h2s_error(h2s, H2_ERR_CANCEL);
5857 }
5858 goto end;
5859 }
Willy Tarreau98de12a2018-12-12 07:03:00 +01005860
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005861 blk = htx_get_head_blk(htx);
5862 type = htx_get_blk_type(blk);
5863 bsize = htx_get_blksz(blk);
5864 fsize = bsize;
5865 trunc_out = 0;
5866 if (type != HTX_BLK_DATA)
5867 goto end;
5868
Willy Tarreau9c218e72019-05-26 10:08:28 +02005869 mbuf = br_tail(h2c->mbuf);
5870 retry:
5871 if (!h2_get_buf(h2c, mbuf)) {
5872 h2c->flags |= H2_CF_MUX_MALLOC;
5873 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005874 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 +02005875 goto end;
5876 }
5877
Willy Tarreau98de12a2018-12-12 07:03:00 +01005878 /* Perform some optimizations to reduce the number of buffer copies.
5879 * First, if the mux's buffer is empty and the htx area contains
5880 * exactly one data block of the same size as the requested count, and
5881 * this count fits within the frame size, the stream's window size, and
5882 * the connection's window size, then it's possible to simply swap the
5883 * caller's buffer with the mux's output buffer and adjust offsets and
5884 * length to match the entire DATA HTX block in the middle. In this
5885 * case we perform a true zero-copy operation from end-to-end. This is
5886 * the situation that happens all the time with large files. Second, if
5887 * this is not possible, but the mux's output buffer is empty, we still
5888 * have an opportunity to avoid the copy to the intermediary buffer, by
5889 * making the intermediary buffer's area point to the output buffer's
5890 * area. In this case we want to skip the HTX header to make sure that
5891 * copies remain aligned and that this operation remains possible all
5892 * the time. This goes for headers, data blocks and any data extracted
5893 * from the HTX blocks.
5894 */
5895 if (unlikely(fsize == count &&
Christopher Faulet192c6a22019-06-11 16:32:24 +02005896 htx_nbblks(htx) == 1 && type == HTX_BLK_DATA &&
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005897 fsize <= h2s_mws(h2s) && fsize <= h2c->mws && fsize <= h2c->mfs)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005898 void *old_area = mbuf->area;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005899
Willy Tarreaubcc45952019-05-26 10:05:50 +02005900 if (b_data(mbuf)) {
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005901 /* Too bad there are data left there. We're willing to memcpy/memmove
5902 * up to 1/4 of the buffer, which means that it's OK to copy a large
5903 * frame into a buffer containing few data if it needs to be realigned,
5904 * and that it's also OK to copy few data without realigning. Otherwise
5905 * we'll pretend the mbuf is full and wait for it to become empty.
Willy Tarreau98de12a2018-12-12 07:03:00 +01005906 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005907 if (fsize + 9 <= b_room(mbuf) &&
5908 (b_data(mbuf) <= b_size(mbuf) / 4 ||
Willy Tarreau7838a792019-08-12 18:42:03 +02005909 (fsize <= b_size(mbuf) / 4 && fsize + 9 <= b_contig_space(mbuf)))) {
5910 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 +01005911 goto copy;
Willy Tarreau7838a792019-08-12 18:42:03 +02005912 }
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005913
Willy Tarreau9c218e72019-05-26 10:08:28 +02005914 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5915 goto retry;
5916
Willy Tarreau98de12a2018-12-12 07:03:00 +01005917 h2c->flags |= H2_CF_MUX_MFULL;
5918 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005919 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 +01005920 goto end;
5921 }
5922
Christopher Faulet925abdf2021-04-27 22:51:07 +02005923 if (htx->flags & HTX_FL_EOM) {
5924 /* EOM+empty: we may need to add END_STREAM (except for tunneled
5925 * message)
5926 */
5927 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5928 es_now = 1;
5929 }
Willy Tarreau98de12a2018-12-12 07:03:00 +01005930 /* map an H2 frame to the HTX block so that we can put the
5931 * frame header there.
5932 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005933 *mbuf = b_make(buf->area, buf->size, sizeof(struct htx) + blk->addr - 9, fsize + 9);
5934 outbuf.area = b_head(mbuf);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005935
5936 /* prepend an H2 DATA frame header just before the DATA block */
5937 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5938 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
Christopher Faulet925abdf2021-04-27 22:51:07 +02005939 if (es_now)
5940 outbuf.area[4] |= H2_F_DATA_END_STREAM;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005941 h2_set_frame_size(outbuf.area, fsize);
5942
5943 /* update windows */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005944 h2s->sws -= fsize;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005945 h2c->mws -= fsize;
5946
5947 /* and exchange with our old area */
5948 buf->area = old_area;
5949 buf->data = buf->head = 0;
5950 total += fsize;
Christopher Faulet925abdf2021-04-27 22:51:07 +02005951 fsize = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005952
5953 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 +02005954 goto out;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005955 }
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005956
Willy Tarreau98de12a2018-12-12 07:03:00 +01005957 copy:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005958 /* for DATA and EOM we'll have to emit a frame, even if empty */
5959
5960 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005961 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5962 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005963 break;
5964 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005965 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005966 }
5967
5968 if (outbuf.size < 9) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02005969 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5970 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005971 h2c->flags |= H2_CF_MUX_MFULL;
5972 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005973 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005974 goto end;
5975 }
5976
5977 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
5978 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5979 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5980 outbuf.data = 9;
5981
5982 /* we have in <fsize> the exact number of bytes we need to copy from
5983 * the HTX buffer. We need to check this against the connection's and
5984 * the stream's send windows, and to ensure that this fits in the max
5985 * frame size and in the buffer's available space minus 9 bytes (for
5986 * the frame header). The connection's flow control is applied last so
5987 * that we can use a separate list of streams which are immediately
5988 * unblocked on window opening. Note: we don't implement padding.
5989 */
5990
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005991 if (!fsize)
5992 goto send_empty;
5993
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005994 if (h2s_mws(h2s) <= 0) {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005995 h2s->flags |= H2_SF_BLK_SFCTL;
Willy Tarreau2b718102021-04-21 07:32:39 +02005996 if (LIST_INLIST(&h2s->list))
Olivier Houchardbfe2a832019-05-10 14:02:21 +02005997 LIST_DEL_INIT(&h2s->list);
Willy Tarreau2b718102021-04-21 07:32:39 +02005998 LIST_APPEND(&h2c->blocked_list, &h2s->list);
Willy Tarreau7838a792019-08-12 18:42:03 +02005999 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 +01006000 goto end;
6001 }
6002
Willy Tarreauee573762018-12-04 15:25:57 +01006003 if (fsize > count)
6004 fsize = count;
6005
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02006006 if (fsize > h2s_mws(h2s))
6007 fsize = h2s_mws(h2s); // >0
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006008
6009 if (h2c->mfs && fsize > h2c->mfs)
6010 fsize = h2c->mfs; // >0
6011
6012 if (fsize + 9 > outbuf.size) {
Willy Tarreau455d5682019-05-24 19:42:18 +02006013 /* It doesn't fit at once. If it at least fits once split and
6014 * the amount of data to move is low, let's defragment the
6015 * buffer now.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006016 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02006017 if (b_space_wraps(mbuf) &&
6018 (fsize + 9 <= b_room(mbuf)) &&
6019 b_data(mbuf) <= MAX_DATA_REALIGN)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006020 goto realign_again;
6021 fsize = outbuf.size - 9;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01006022 trunc_out = 1;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006023
6024 if (fsize <= 0) {
6025 /* no need to send an empty frame here */
Willy Tarreau9c218e72019-05-26 10:08:28 +02006026 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
6027 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006028 h2c->flags |= H2_CF_MUX_MFULL;
6029 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02006030 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006031 goto end;
6032 }
6033 }
6034
6035 if (h2c->mws <= 0) {
6036 h2s->flags |= H2_SF_BLK_MFCTL;
Willy Tarreau7838a792019-08-12 18:42:03 +02006037 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 +01006038 goto end;
6039 }
6040
6041 if (fsize > h2c->mws)
6042 fsize = h2c->mws;
6043
6044 /* now let's copy this this into the output buffer */
6045 memcpy(outbuf.area + 9, htx_get_blk_ptr(htx, blk), fsize);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02006046 h2s->sws -= fsize;
Willy Tarreau0f799ca2018-12-04 15:20:11 +01006047 h2c->mws -= fsize;
Willy Tarreauee573762018-12-04 15:25:57 +01006048 count -= fsize;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006049
6050 send_empty:
6051 /* update the frame's size */
6052 h2_set_frame_size(outbuf.area, fsize);
6053
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006054 /* consume incoming HTX block */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006055 total += fsize;
6056 if (fsize == bsize) {
6057 htx_remove_blk(htx, blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006058 if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx)) {
6059 /* EOM+empty: we may need to add END_STREAM (except for tunneled
6060 * message)
6061 */
6062 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
6063 es_now = 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02006064 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006065 }
6066 else {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006067 /* we've truncated this block */
6068 htx_cut_data_blk(htx, blk, fsize);
6069 }
6070
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006071 if (es_now)
6072 outbuf.area[4] |= H2_F_DATA_END_STREAM;
6073
6074 /* commit the H2 response */
6075 b_add(mbuf, fsize + 9);
6076
Christopher Faulet925abdf2021-04-27 22:51:07 +02006077 out:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006078 if (es_now) {
6079 if (h2s->st == H2_SS_OPEN)
6080 h2s->st = H2_SS_HLOC;
6081 else
6082 h2s_close(h2s);
6083
6084 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02006085 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 +01006086 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006087 else if (fsize) {
6088 if (fsize == bsize) {
6089 TRACE_DEVEL("more data may be available, trying to send another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6090 goto new_frame;
6091 }
6092 else if (trunc_out) {
6093 /* we've truncated this block */
6094 goto new_frame;
6095 }
6096 }
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006097
6098 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02006099 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006100 return total;
6101}
6102
Christopher Faulet991febd2020-12-02 15:17:31 +01006103/* Skip the message payload (DATA blocks) and emit an empty DATA frame with the
6104 * ES flag set for stream <h2s>. This function is called for response known to
6105 * have no payload. Only DATA blocks are skipped. This means the trailers are
Ilya Shipitsinacf84592021-02-06 22:29:08 +05006106 * still emitted. The caller must check the stream's status to detect any error
Christopher Faulet991febd2020-12-02 15:17:31 +01006107 * which might have happened subsequently to a successful send. Returns the
6108 * number of data bytes consumed, or zero if nothing done.
6109 */
6110static size_t h2s_skip_data(struct h2s *h2s, struct buffer *buf, size_t count)
6111{
6112 struct h2c *h2c = h2s->h2c;
6113 struct htx *htx;
6114 int bsize; /* htx block size */
6115 int fsize; /* h2 frame size */
6116 struct htx_blk *blk;
6117 enum htx_blk_type type;
6118 size_t total = 0;
6119
6120 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6121
6122 if (h2c_mux_busy(h2c, h2s)) {
6123 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6124 h2s->flags |= H2_SF_BLK_MBUSY;
6125 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6126 goto end;
6127 }
6128
6129 htx = htx_from_buf(buf);
6130
6131 next_data:
6132 if (!count || htx_is_empty(htx))
6133 goto end;
6134 blk = htx_get_head_blk(htx);
6135 type = htx_get_blk_type(blk);
6136 bsize = htx_get_blksz(blk);
6137 fsize = bsize;
6138 if (type != HTX_BLK_DATA)
6139 goto end;
6140
6141 if (fsize > count)
6142 fsize = count;
6143
6144 if (fsize != bsize)
6145 goto skip_data;
6146
6147 if (!(htx->flags & HTX_FL_EOM) || !htx_is_unique_blk(htx, blk))
6148 goto skip_data;
6149
6150 /* Here, it is the last block and it is also the end of the message. So
6151 * we can emit an empty DATA frame with the ES flag set
6152 */
6153 if (h2_send_empty_data_es(h2s) <= 0)
6154 goto end;
6155
6156 if (h2s->st == H2_SS_OPEN)
6157 h2s->st = H2_SS_HLOC;
6158 else
6159 h2s_close(h2s);
6160
6161 skip_data:
6162 /* consume incoming HTX block */
6163 total += fsize;
6164 if (fsize == bsize) {
6165 TRACE_DEVEL("more data may be available, trying to skip another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6166 htx_remove_blk(htx, blk);
6167 goto next_data;
6168 }
6169 else {
6170 /* we've truncated this block */
6171 htx_cut_data_blk(htx, blk, fsize);
6172 }
6173
6174 end:
6175 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6176 return total;
6177}
6178
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006179/* Try to send a HEADERS frame matching HTX_BLK_TLR series of blocks present in
6180 * HTX message <htx> for the H2 stream <h2s>. Returns the number of bytes
6181 * processed. The caller must check the stream's status to detect any error
6182 * which might have happened subsequently to a successful send. The htx blocks
6183 * are automatically removed from the message. The htx message is assumed to be
6184 * valid since produced from the internal code. Processing stops when meeting
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006185 * the EOT, which *is* removed. All trailers are processed at once and sent as a
6186 * single frame. The ES flag is always set.
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006187 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006188static size_t h2s_make_trailers(struct h2s *h2s, struct htx *htx)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006189{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02006190 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006191 struct h2c *h2c = h2s->h2c;
6192 struct htx_blk *blk;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006193 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02006194 struct buffer *mbuf;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006195 enum htx_blk_type type;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006196 int ret = 0;
6197 int hdr;
6198 int idx;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006199
Willy Tarreau7838a792019-08-12 18:42:03 +02006200 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
6201
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006202 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006203 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006204 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02006205 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006206 goto end;
6207 }
6208
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006209 /* get trailers. */
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006210 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006211 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006212 type = htx_get_blk_type(blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006213
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006214 if (type == HTX_BLK_UNUSED)
6215 continue;
6216
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006217 if (type == HTX_BLK_EOT)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006218 break;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006219 if (type == HTX_BLK_TLR) {
6220 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
6221 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
6222 goto fail;
6223 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006224
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006225 list[hdr].n = htx_get_blk_name(htx, blk);
6226 list[hdr].v = htx_get_blk_value(htx, blk);
6227 hdr++;
6228 }
6229 else {
6230 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 +01006231 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02006232 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006233 }
6234
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006235 /* marker for end of trailers */
6236 list[hdr].n = ist("");
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006237
Willy Tarreau9c218e72019-05-26 10:08:28 +02006238 mbuf = br_tail(h2c->mbuf);
6239 retry:
6240 if (!h2_get_buf(h2c, mbuf)) {
6241 h2c->flags |= H2_CF_MUX_MALLOC;
6242 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02006243 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 +02006244 goto end;
6245 }
6246
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006247 chunk_reset(&outbuf);
6248
6249 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02006250 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
6251 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006252 break;
6253 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02006254 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006255 }
6256
6257 if (outbuf.size < 9)
6258 goto full;
6259
6260 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4,ES=1 */
6261 memcpy(outbuf.area, "\x00\x00\x00\x01\x05", 5);
6262 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
6263 outbuf.data = 9;
6264
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006265 /* encode all headers */
6266 for (idx = 0; idx < hdr; idx++) {
6267 /* these ones do not exist in H2 or must not appear in
6268 * trailers and must be dropped.
6269 */
6270 if (isteq(list[idx].n, ist("host")) ||
6271 isteq(list[idx].n, ist("content-length")) ||
6272 isteq(list[idx].n, ist("connection")) ||
6273 isteq(list[idx].n, ist("proxy-connection")) ||
6274 isteq(list[idx].n, ist("keep-alive")) ||
6275 isteq(list[idx].n, ist("upgrade")) ||
6276 isteq(list[idx].n, ist("te")) ||
6277 isteq(list[idx].n, ist("transfer-encoding")))
6278 continue;
6279
Christopher Faulet86d144c2019-08-14 16:32:25 +02006280 /* Skip all pseudo-headers */
6281 if (*(list[idx].n.ptr) == ':')
6282 continue;
6283
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006284 if (!hpack_encode_header(&outbuf, list[idx].n, list[idx].v)) {
6285 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02006286 if (b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006287 goto realign_again;
6288 goto full;
6289 }
6290 }
6291
Willy Tarreau5121e5d2019-05-06 15:13:41 +02006292 if (outbuf.data == 9) {
6293 /* here we have a problem, we have nothing to emit (either we
6294 * received an empty trailers block followed or we removed its
6295 * contents above). Because of this we can't send a HEADERS
6296 * frame, so we have to cheat and instead send an empty DATA
6297 * frame conveying the ES flag.
Willy Tarreau67b8cae2019-02-21 18:16:35 +01006298 */
6299 outbuf.area[3] = H2_FT_DATA;
6300 outbuf.area[4] = H2_F_DATA_END_STREAM;
6301 }
6302
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006303 /* update the frame's size */
6304 h2_set_frame_size(outbuf.area, outbuf.data - 9);
6305
Willy Tarreau572d9f52019-10-11 16:58:37 +02006306 if (outbuf.data > h2c->mfs + 9) {
6307 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
6308 /* output full */
6309 if (b_space_wraps(mbuf))
6310 goto realign_again;
6311 goto full;
6312 }
6313 }
6314
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006315 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02006316 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 +02006317 b_add(mbuf, outbuf.data);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006318 h2s->flags |= H2_SF_ES_SENT;
6319
6320 if (h2s->st == H2_SS_OPEN)
6321 h2s->st = H2_SS_HLOC;
6322 else
6323 h2s_close(h2s);
6324
6325 /* OK we could properly deliver the response */
6326 done:
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02006327 /* remove all header blocks till the end and compute the corresponding size. */
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006328 ret = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006329 blk = htx_get_head_blk(htx);
6330 while (blk) {
6331 type = htx_get_blk_type(blk);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006332 ret += htx_get_blksz(blk);
6333 blk = htx_remove_blk(htx, blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006334 /* The removed block is the EOT */
6335 if (type == HTX_BLK_EOT)
6336 break;
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006337 }
6338
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006339 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02006340 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006341 return ret;
6342 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02006343 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
6344 goto retry;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006345 h2c->flags |= H2_CF_MUX_MFULL;
6346 h2s->flags |= H2_SF_BLK_MROOM;
6347 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006348 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 +01006349 goto end;
6350 fail:
6351 /* unparsable HTX messages, too large ones to be produced in the local
6352 * list etc go here (unrecoverable errors).
6353 */
6354 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
6355 ret = 0;
6356 goto end;
6357}
6358
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006359/* Called from the upper layer, to subscribe <es> to events <event_type>. The
6360 * event subscriber <es> is not allowed to change from a previous call as long
6361 * as at least one event is still subscribed. The <event_type> must only be a
6362 * combination of SUB_RETRY_RECV and SUB_RETRY_SEND. It always returns 0.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006363 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006364static int h2_subscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard6ff20392018-07-17 18:46:31 +02006365{
Olivier Houchard6ff20392018-07-17 18:46:31 +02006366 struct h2s *h2s = cs->ctx;
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02006367 struct h2c *h2c = h2s->h2c;
Olivier Houchard6ff20392018-07-17 18:46:31 +02006368
Willy Tarreau7838a792019-08-12 18:42:03 +02006369 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006370
6371 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006372 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006373
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006374 es->events |= event_type;
6375 h2s->subs = es;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006376
6377 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006378 TRACE_DEVEL("subscribe(recv)", H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006379
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006380 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006381 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2c->conn, h2s);
Olivier Houchardf8338152019-05-14 17:50:32 +02006382 if (!(h2s->flags & H2_SF_BLK_SFCTL) &&
Willy Tarreau2b718102021-04-21 07:32:39 +02006383 !LIST_INLIST(&h2s->list)) {
Olivier Houchardf8338152019-05-14 17:50:32 +02006384 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02006385 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Olivier Houchardf8338152019-05-14 17:50:32 +02006386 else
Willy Tarreau2b718102021-04-21 07:32:39 +02006387 LIST_APPEND(&h2c->send_list, &h2s->list);
Olivier Houcharde1c6dbc2018-08-01 17:06:43 +02006388 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02006389 }
Willy Tarreau7838a792019-08-12 18:42:03 +02006390 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006391 return 0;
Olivier Houchard6ff20392018-07-17 18:46:31 +02006392}
6393
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006394/* Called from the upper layer, to unsubscribe <es> from events <event_type>.
6395 * The <es> pointer is not allowed to differ from the one passed to the
6396 * subscribe() call. It always returns zero.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006397 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006398static int h2_unsubscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006399{
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006400 struct h2s *h2s = cs->ctx;
6401
Willy Tarreau7838a792019-08-12 18:42:03 +02006402 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006403
6404 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006405 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006406
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006407 es->events &= ~event_type;
6408 if (!es->events)
Willy Tarreauf96508a2020-01-10 11:12:48 +01006409 h2s->subs = NULL;
6410
6411 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006412 TRACE_DEVEL("unsubscribe(recv)", H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006413
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006414 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006415 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006416 h2s->flags &= ~H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006417 if (!(h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)))
6418 LIST_DEL_INIT(&h2s->list);
Olivier Houchardd846c262018-10-19 17:24:29 +02006419 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01006420
Willy Tarreau7838a792019-08-12 18:42:03 +02006421 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006422 return 0;
6423}
6424
6425
Christopher Faulet93a466b2021-09-21 15:50:55 +02006426/* Called from the upper layer, to receive data
6427 *
6428 * The caller is responsible for defragmenting <buf> if necessary. But <flags>
6429 * must be tested to know the calling context. If CO_RFL_BUF_FLUSH is set, it
6430 * means the caller wants to flush input data (from the mux buffer and the
6431 * channel buffer) to be able to use kernel splicing or any kind of mux-to-mux
6432 * xfer. If CO_RFL_KEEP_RECV is set, the mux must always subscribe for read
6433 * events before giving back. CO_RFL_BUF_WET is set if <buf> is congested with
6434 * data scheduled for leaving soon. CO_RFL_BUF_NOT_STUCK is set to instruct the
6435 * mux it may optimize the data copy to <buf> if necessary. Otherwise, it should
6436 * copy as much data as possible.
6437 */
Olivier Houchard511efea2018-08-16 15:30:32 +02006438static size_t h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
6439{
Olivier Houchard638b7992018-08-16 15:41:52 +02006440 struct h2s *h2s = cs->ctx;
Willy Tarreau082f5592018-11-25 08:03:32 +01006441 struct h2c *h2c = h2s->h2c;
Willy Tarreau86724e22018-12-01 23:19:43 +01006442 struct htx *h2s_htx = NULL;
6443 struct htx *buf_htx = NULL;
Olivier Houchard511efea2018-08-16 15:30:32 +02006444 size_t ret = 0;
6445
Willy Tarreau7838a792019-08-12 18:42:03 +02006446 TRACE_ENTER(H2_EV_STRM_RECV, h2c->conn, h2s);
6447
Olivier Houchard511efea2018-08-16 15:30:32 +02006448 /* transfer possibly pending data to the upper layer */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006449 h2s_htx = htx_from_buf(&h2s->rxbuf);
Christopher Faulet83f3d3d2022-02-21 15:12:54 +01006450 if (htx_is_empty(h2s_htx) && !(h2s_htx->flags & HTX_FL_PARSING_ERROR)) {
Christopher Faulet9b79a102019-07-15 11:22:56 +02006451 /* Here htx_to_buf() will set buffer data to 0 because
6452 * the HTX is empty.
6453 */
6454 htx_to_buf(h2s_htx, &h2s->rxbuf);
6455 goto end;
6456 }
Willy Tarreau7196dd62019-03-05 10:51:11 +01006457
Christopher Faulet9b79a102019-07-15 11:22:56 +02006458 ret = h2s_htx->data;
6459 buf_htx = htx_from_buf(buf);
Willy Tarreau7196dd62019-03-05 10:51:11 +01006460
Christopher Faulet9b79a102019-07-15 11:22:56 +02006461 /* <buf> is empty and the message is small enough, swap the
6462 * buffers. */
6463 if (htx_is_empty(buf_htx) && htx_used_space(h2s_htx) <= count) {
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01006464 htx_to_buf(buf_htx, buf);
6465 htx_to_buf(h2s_htx, &h2s->rxbuf);
Christopher Faulet9b79a102019-07-15 11:22:56 +02006466 b_xfer(buf, &h2s->rxbuf, b_data(&h2s->rxbuf));
6467 goto end;
Willy Tarreau86724e22018-12-01 23:19:43 +01006468 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02006469
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006470 htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_UNUSED);
Christopher Faulet9b79a102019-07-15 11:22:56 +02006471
6472 if (h2s_htx->flags & HTX_FL_PARSING_ERROR) {
6473 buf_htx->flags |= HTX_FL_PARSING_ERROR;
6474 if (htx_is_empty(buf_htx))
6475 cs->flags |= CS_FL_EOI;
Willy Tarreau86724e22018-12-01 23:19:43 +01006476 }
Christopher Faulet810df062020-07-22 16:20:34 +02006477 else if (htx_is_empty(h2s_htx))
Christopher Faulet42432f32020-11-20 17:43:16 +01006478 buf_htx->flags |= (h2s_htx->flags & HTX_FL_EOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02006479
Christopher Faulet9b79a102019-07-15 11:22:56 +02006480 buf_htx->extra = (h2s_htx->extra ? (h2s_htx->data + h2s_htx->extra) : 0);
6481 htx_to_buf(buf_htx, buf);
6482 htx_to_buf(h2s_htx, &h2s->rxbuf);
6483 ret -= h2s_htx->data;
6484
Christopher Faulet37070b22019-02-14 15:12:14 +01006485 end:
Olivier Houchard638b7992018-08-16 15:41:52 +02006486 if (b_data(&h2s->rxbuf))
Olivier Houchardd247be02018-12-06 16:22:29 +01006487 cs->flags |= (CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02006488 else {
Olivier Houchardd247be02018-12-06 16:22:29 +01006489 cs->flags &= ~(CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Christopher Fauletd0db4232021-01-22 11:46:30 +01006490 if (h2s->flags & H2_SF_ES_RCVD) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02006491 cs->flags |= CS_FL_EOI;
Christopher Fauletd0db4232021-01-22 11:46:30 +01006492 /* Add EOS flag for tunnel */
6493 if (h2s->flags & H2_SF_BODY_TUNNEL)
6494 cs->flags |= CS_FL_EOS;
6495 }
Christopher Fauletaade4ed2020-10-08 15:38:41 +02006496 if (h2c_read0_pending(h2c) || h2s->st == H2_SS_CLOSED)
Olivier Houchard511efea2018-08-16 15:30:32 +02006497 cs->flags |= CS_FL_EOS;
Olivier Houchard71748cb2018-12-17 14:16:46 +01006498 if (cs->flags & CS_FL_ERR_PENDING)
6499 cs->flags |= CS_FL_ERROR;
Olivier Houchard638b7992018-08-16 15:41:52 +02006500 if (b_size(&h2s->rxbuf)) {
6501 b_free(&h2s->rxbuf);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01006502 offer_buffers(NULL, 1);
Olivier Houchard638b7992018-08-16 15:41:52 +02006503 }
Olivier Houchard511efea2018-08-16 15:30:32 +02006504 }
6505
Willy Tarreau082f5592018-11-25 08:03:32 +01006506 if (ret && h2c->dsi == h2s->id) {
6507 /* demux is blocking on this stream's buffer */
6508 h2c->flags &= ~H2_CF_DEM_SFULL;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02006509 h2c_restart_reading(h2c, 1);
Willy Tarreau082f5592018-11-25 08:03:32 +01006510 }
Christopher Faulet37070b22019-02-14 15:12:14 +01006511
Willy Tarreau7838a792019-08-12 18:42:03 +02006512 TRACE_LEAVE(H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard511efea2018-08-16 15:30:32 +02006513 return ret;
6514}
6515
Olivier Houchardd846c262018-10-19 17:24:29 +02006516
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006517/* Called from the upper layer, to send data from buffer <buf> for no more than
6518 * <count> bytes. Returns the number of bytes effectively sent. Some status
6519 * flags may be updated on the conn_stream.
6520 */
Christopher Fauletd44a9b32018-07-27 11:59:41 +02006521static size_t h2_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
Willy Tarreau62f52692017-10-08 23:01:42 +02006522{
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006523 struct h2s *h2s = cs->ctx;
Willy Tarreau1dc41e72018-06-14 13:21:28 +02006524 size_t total = 0;
Willy Tarreau5dd17352018-06-14 13:33:30 +02006525 size_t ret;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006526 struct htx *htx;
6527 struct htx_blk *blk;
6528 enum htx_blk_type btype;
6529 uint32_t bsize;
6530 int32_t idx;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006531
Willy Tarreau7838a792019-08-12 18:42:03 +02006532 TRACE_ENTER(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
6533
Olivier Houchardd360ac62019-03-22 17:37:16 +01006534 /* If we were not just woken because we wanted to send but couldn't,
6535 * and there's somebody else that is waiting to send, do nothing,
6536 * we will subscribe later and be put at the end of the list
6537 */
Willy Tarreaud9464162020-01-10 18:25:07 +01006538 if (!(h2s->flags & H2_SF_NOTIFIED) &&
Willy Tarreau7838a792019-08-12 18:42:03 +02006539 (!LIST_ISEMPTY(&h2s->h2c->send_list) || !LIST_ISEMPTY(&h2s->h2c->fctl_list))) {
6540 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 +01006541 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006542 }
Willy Tarreaud9464162020-01-10 18:25:07 +01006543 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02006544
Willy Tarreau7838a792019-08-12 18:42:03 +02006545 if (h2s->h2c->st0 < H2_CS_FRAME_H) {
6546 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 +02006547 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006548 }
Willy Tarreau6bf641a2018-10-08 09:43:03 +02006549
Willy Tarreaucab22952019-10-31 15:48:18 +01006550 if (h2s->h2c->st0 >= H2_CS_ERROR) {
6551 cs->flags |= CS_FL_ERROR;
6552 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);
6553 return 0;
6554 }
6555
Christopher Faulet9b79a102019-07-15 11:22:56 +02006556 htx = htx_from_buf(buf);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006557
Willy Tarreau0bad0432018-06-14 16:54:01 +02006558 if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count)
Willy Tarreauc4312d32017-11-07 12:01:53 +01006559 h2s->flags |= H2_SF_OUTGOING_DATA;
6560
Willy Tarreau751f2d02018-10-05 09:35:00 +02006561 if (h2s->id == 0) {
6562 int32_t id = h2c_get_next_sid(h2s->h2c);
6563
6564 if (id < 0) {
Willy Tarreau751f2d02018-10-05 09:35:00 +02006565 cs->flags |= CS_FL_ERROR;
Willy Tarreau7838a792019-08-12 18:42:03 +02006566 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 +02006567 return 0;
6568 }
6569
6570 eb32_delete(&h2s->by_id);
6571 h2s->by_id.key = h2s->id = id;
6572 h2s->h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01006573 h2s->h2c->nb_reserved--;
Willy Tarreau751f2d02018-10-05 09:35:00 +02006574 eb32_insert(&h2s->h2c->streams_by_id, &h2s->by_id);
6575 }
6576
Christopher Faulet9b79a102019-07-15 11:22:56 +02006577 while (h2s->st < H2_SS_HLOC && !(h2s->flags & H2_SF_BLK_ANY) &&
6578 count && !htx_is_empty(htx)) {
6579 idx = htx_get_head(htx);
6580 blk = htx_get_blk(htx, idx);
6581 btype = htx_get_blk_type(blk);
6582 bsize = htx_get_blksz(blk);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006583
Christopher Faulet9b79a102019-07-15 11:22:56 +02006584 switch (btype) {
Willy Tarreau80739692018-10-05 11:35:57 +02006585 case HTX_BLK_REQ_SL:
6586 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006587 ret = h2s_bck_make_req_headers(h2s, htx);
Willy Tarreau80739692018-10-05 11:35:57 +02006588 if (ret > 0) {
6589 total += ret;
6590 count -= ret;
6591 if (ret < bsize)
6592 goto done;
6593 }
6594 break;
6595
Willy Tarreau115e83b2018-12-01 19:17:53 +01006596 case HTX_BLK_RES_SL:
6597 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006598 ret = h2s_frt_make_resp_headers(h2s, htx);
Willy Tarreau115e83b2018-12-01 19:17:53 +01006599 if (ret > 0) {
6600 total += ret;
6601 count -= ret;
6602 if (ret < bsize)
6603 goto done;
6604 }
6605 break;
6606
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006607 case HTX_BLK_DATA:
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006608 /* all these cause the emission of a DATA frame (possibly empty) */
Christopher Faulet991febd2020-12-02 15:17:31 +01006609 if (!(h2s->h2c->flags & H2_CF_IS_BACK) &&
6610 (h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_BODYLESS_RESP)) == H2_SF_BODYLESS_RESP)
6611 ret = h2s_skip_data(h2s, buf, count);
6612 else
6613 ret = h2s_make_data(h2s, buf, count);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006614 if (ret > 0) {
Willy Tarreau98de12a2018-12-12 07:03:00 +01006615 htx = htx_from_buf(buf);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006616 total += ret;
6617 count -= ret;
6618 if (ret < bsize)
6619 goto done;
6620 }
6621 break;
6622
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006623 case HTX_BLK_TLR:
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006624 case HTX_BLK_EOT:
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006625 /* This is the first trailers block, all the subsequent ones */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006626 ret = h2s_make_trailers(h2s, htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006627 if (ret > 0) {
6628 total += ret;
6629 count -= ret;
6630 if (ret < bsize)
6631 goto done;
6632 }
6633 break;
6634
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006635 default:
6636 htx_remove_blk(htx, blk);
6637 total += bsize;
6638 count -= bsize;
6639 break;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006640 }
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006641 }
6642
Christopher Faulet9b79a102019-07-15 11:22:56 +02006643 done:
Willy Tarreau2b778482019-05-06 15:00:22 +02006644 if (h2s->st >= H2_SS_HLOC) {
Willy Tarreau00610962018-07-19 10:58:28 +02006645 /* trim any possibly pending data after we close (extra CR-LF,
6646 * unprocessed trailers, abnormal extra data, ...)
6647 */
Willy Tarreau0bad0432018-06-14 16:54:01 +02006648 total += count;
6649 count = 0;
Willy Tarreau00610962018-07-19 10:58:28 +02006650 }
6651
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006652 /* RST are sent similarly to frame acks */
Willy Tarreau02492192017-12-07 15:59:29 +01006653 if (h2s->st == H2_SS_ERROR || h2s->flags & H2_SF_RST_RCVD) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006654 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 +01006655 cs_set_error(cs);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01006656 if (h2s_send_rst_stream(h2s->h2c, h2s) > 0)
Willy Tarreau00dd0782018-03-01 16:31:34 +01006657 h2s_close(h2s);
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006658 }
6659
Christopher Faulet9b79a102019-07-15 11:22:56 +02006660 htx_to_buf(htx, buf);
Olivier Houchardd846c262018-10-19 17:24:29 +02006661
Olivier Houchard7505f942018-08-21 18:10:44 +02006662 if (total > 0) {
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006663 if (!(h2s->h2c->wait_event.events & SUB_RETRY_SEND)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006664 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 +02006665 tasklet_wakeup(h2s->h2c->wait_event.tasklet);
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006666 }
Olivier Houchardd846c262018-10-19 17:24:29 +02006667
Olivier Houchard7505f942018-08-21 18:10:44 +02006668 }
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01006669 /* If we're waiting for flow control, and we got a shutr on the
6670 * connection, we will never be unlocked, so add an error on
6671 * the conn_stream.
6672 */
6673 if (conn_xprt_read0_pending(h2s->h2c->conn) &&
6674 !b_data(&h2s->h2c->dbuf) &&
6675 (h2s->flags & (H2_SF_BLK_SFCTL | H2_SF_BLK_MFCTL))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006676 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 +01006677 if (cs->flags & CS_FL_EOS)
6678 cs->flags |= CS_FL_ERROR;
6679 else
6680 cs->flags |= CS_FL_ERR_PENDING;
6681 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006682
Willy Tarreau5723f292020-01-10 15:16:57 +01006683 if (total > 0 && !(h2s->flags & H2_SF_BLK_SFCTL) &&
6684 !(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006685 /* Ok we managed to send something, leave the send_list if we were still there */
Olivier Houchardd360ac62019-03-22 17:37:16 +01006686 LIST_DEL_INIT(&h2s->list);
6687 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006688
Willy Tarreau7838a792019-08-12 18:42:03 +02006689 TRACE_LEAVE(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006690 return total;
Willy Tarreau62f52692017-10-08 23:01:42 +02006691}
6692
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006693/* for debugging with CLI's "show fd" command */
Willy Tarreau8050efe2021-01-21 08:26:06 +01006694static int h2_show_fd(struct buffer *msg, struct connection *conn)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006695{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01006696 struct h2c *h2c = conn->ctx;
Willy Tarreau987c0632018-12-18 10:32:05 +01006697 struct h2s *h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006698 struct eb32_node *node;
6699 int fctl_cnt = 0;
6700 int send_cnt = 0;
6701 int tree_cnt = 0;
6702 int orph_cnt = 0;
Willy Tarreau60f62682019-05-26 11:32:27 +02006703 struct buffer *hmbuf, *tmbuf;
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006704 int ret = 0;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006705
6706 if (!h2c)
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006707 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006708
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006709 list_for_each_entry(h2s, &h2c->fctl_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006710 fctl_cnt++;
6711
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006712 list_for_each_entry(h2s, &h2c->send_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006713 send_cnt++;
6714
Willy Tarreau3af37712018-12-18 14:34:41 +01006715 h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006716 node = eb32_first(&h2c->streams_by_id);
6717 while (node) {
6718 h2s = container_of(node, struct h2s, by_id);
6719 tree_cnt++;
6720 if (!h2s->cs)
6721 orph_cnt++;
6722 node = eb32_next(node);
6723 }
6724
Willy Tarreau60f62682019-05-26 11:32:27 +02006725 hmbuf = br_head(h2c->mbuf);
Willy Tarreaubcc45952019-05-26 10:05:50 +02006726 tmbuf = br_tail(h2c->mbuf);
Willy Tarreauab2ec452019-08-30 07:07:08 +02006727 chunk_appendf(msg, " h2c.st0=%s .err=%d .maxid=%d .lastid=%d .flg=0x%04x"
Willy Tarreau987c0632018-12-18 10:32:05 +01006728 " .nbst=%u .nbcs=%u .fctl_cnt=%d .send_cnt=%d .tree_cnt=%d"
Willy Tarreau60f62682019-05-26 11:32:27 +02006729 " .orph_cnt=%d .sub=%d .dsi=%d .dbuf=%u@%p+%u/%u .msi=%d"
6730 " .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]",
Willy Tarreauab2ec452019-08-30 07:07:08 +02006731 h2c_st_to_str(h2c->st0), h2c->errcode, h2c->max_id, h2c->last_sid, h2c->flags,
Willy Tarreau616ac812018-07-24 14:12:42 +02006732 h2c->nb_streams, h2c->nb_cs, fctl_cnt, send_cnt, tree_cnt, orph_cnt,
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006733 h2c->wait_event.events, h2c->dsi,
Willy Tarreau987c0632018-12-18 10:32:05 +01006734 (unsigned int)b_data(&h2c->dbuf), b_orig(&h2c->dbuf),
6735 (unsigned int)b_head_ofs(&h2c->dbuf), (unsigned int)b_size(&h2c->dbuf),
6736 h2c->msi,
Willy Tarreau60f62682019-05-26 11:32:27 +02006737 br_head_idx(h2c->mbuf), br_tail_idx(h2c->mbuf), br_size(h2c->mbuf),
6738 (unsigned int)b_data(hmbuf), b_orig(hmbuf),
6739 (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf),
Willy Tarreaubcc45952019-05-26 10:05:50 +02006740 (unsigned int)b_data(tmbuf), b_orig(tmbuf),
6741 (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf));
Willy Tarreau987c0632018-12-18 10:32:05 +01006742
6743 if (h2s) {
Willy Tarreaued4464e2021-01-20 15:50:03 +01006744 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 +02006745 h2s, h2s->id, h2s_st_to_str(h2s->st), h2s->flags,
Willy Tarreau987c0632018-12-18 10:32:05 +01006746 (unsigned int)b_data(&h2s->rxbuf), b_orig(&h2s->rxbuf),
6747 (unsigned int)b_head_ofs(&h2s->rxbuf), (unsigned int)b_size(&h2s->rxbuf),
6748 h2s->cs);
6749 if (h2s->cs)
Willy Tarreau98e40b92021-01-20 16:27:01 +01006750 chunk_appendf(msg, "(.flg=0x%08x .data=%p)",
Willy Tarreau987c0632018-12-18 10:32:05 +01006751 h2s->cs->flags, h2s->cs->data);
Willy Tarreau98e40b92021-01-20 16:27:01 +01006752
Willy Tarreaue972a432022-09-01 18:02:15 +02006753 chunk_appendf(msg, " .subs=%p", h2s->subs);
Willy Tarreau98e40b92021-01-20 16:27:01 +01006754 if (h2s->subs) {
Willy Tarreaue972a432022-09-01 18:02:15 +02006755 chunk_appendf(msg, "(ev=%d tl=%p", h2s->subs->events, h2s->subs->tasklet);
6756 chunk_appendf(msg, " tl.calls=%d tl.ctx=%p tl.fct=",
Christopher Faulet6c93c4e2021-02-25 10:06:29 +01006757 h2s->subs->tasklet->calls,
6758 h2s->subs->tasklet->context);
6759 if (h2s->subs->tasklet->calls >= 1000000)
6760 ret = 1;
Willy Tarreaue972a432022-09-01 18:02:15 +02006761 resolve_sym_name(msg, NULL, h2s->subs->tasklet->process);
6762 chunk_appendf(msg, ")");
Willy Tarreau98e40b92021-01-20 16:27:01 +01006763 }
Willy Tarreau987c0632018-12-18 10:32:05 +01006764 }
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006765 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006766}
Willy Tarreau62f52692017-10-08 23:01:42 +02006767
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006768/* Migrate the the connection to the current thread.
6769 * Return 0 if successful, non-zero otherwise.
6770 * Expected to be called with the old thread lock held.
6771 */
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006772static int h2_takeover(struct connection *conn, int orig_tid)
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006773{
6774 struct h2c *h2c = conn->ctx;
Willy Tarreau617e80f2020-07-01 16:39:33 +02006775 struct task *task;
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006776
6777 if (fd_takeover(conn->handle.fd, conn) != 0)
6778 return -1;
Olivier Houcharda74bb7e2020-07-03 14:01:21 +02006779
6780 if (conn->xprt->takeover && conn->xprt->takeover(conn, conn->xprt_ctx, orig_tid) != 0) {
6781 /* We failed to takeover the xprt, even if the connection may
6782 * still be valid, flag it as error'd, as we have already
6783 * taken over the fd, and wake the tasklet, so that it will
6784 * destroy it.
6785 */
6786 conn->flags |= CO_FL_ERROR;
6787 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
6788 return -1;
6789 }
6790
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006791 if (h2c->wait_event.events)
6792 h2c->conn->xprt->unsubscribe(h2c->conn, h2c->conn->xprt_ctx,
6793 h2c->wait_event.events, &h2c->wait_event);
6794 /* To let the tasklet know it should free itself, and do nothing else,
6795 * set its context to NULL.
6796 */
6797 h2c->wait_event.tasklet->context = NULL;
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006798 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
Willy Tarreau617e80f2020-07-01 16:39:33 +02006799
6800 task = h2c->task;
6801 if (task) {
6802 task->context = NULL;
6803 h2c->task = NULL;
6804 __ha_barrier_store();
6805 task_kill(task);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006806
6807 h2c->task = task_new(tid_bit);
6808 if (!h2c->task) {
6809 h2_release(h2c);
6810 return -1;
6811 }
6812 h2c->task->process = h2_timeout_task;
6813 h2c->task->context = h2c;
6814 }
6815 h2c->wait_event.tasklet = tasklet_new();
6816 if (!h2c->wait_event.tasklet) {
6817 h2_release(h2c);
6818 return -1;
6819 }
6820 h2c->wait_event.tasklet->process = h2_io_cb;
6821 h2c->wait_event.tasklet->context = h2c;
6822 h2c->conn->xprt->subscribe(h2c->conn, h2c->conn->xprt_ctx,
6823 SUB_RETRY_RECV, &h2c->wait_event);
6824
6825 return 0;
6826}
6827
Willy Tarreau62f52692017-10-08 23:01:42 +02006828/*******************************************************/
6829/* functions below are dedicated to the config parsers */
6830/*******************************************************/
6831
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006832/* config parser for global "tune.h2.header-table-size" */
6833static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006834 const struct proxy *defpx, const char *file, int line,
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006835 char **err)
6836{
6837 if (too_many_args(1, args, err, NULL))
6838 return -1;
6839
6840 h2_settings_header_table_size = atoi(args[1]);
6841 if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) {
6842 memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]);
6843 return -1;
6844 }
6845 return 0;
6846}
Willy Tarreau62f52692017-10-08 23:01:42 +02006847
Willy Tarreaue6baec02017-07-27 11:45:11 +02006848/* config parser for global "tune.h2.initial-window-size" */
6849static int h2_parse_initial_window_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006850 const struct proxy *defpx, const char *file, int line,
Willy Tarreaue6baec02017-07-27 11:45:11 +02006851 char **err)
6852{
6853 if (too_many_args(1, args, err, NULL))
6854 return -1;
6855
6856 h2_settings_initial_window_size = atoi(args[1]);
6857 if (h2_settings_initial_window_size < 0) {
6858 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6859 return -1;
6860 }
6861 return 0;
6862}
6863
Willy Tarreau5242ef82017-07-27 11:47:28 +02006864/* config parser for global "tune.h2.max-concurrent-streams" */
6865static int h2_parse_max_concurrent_streams(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006866 const struct proxy *defpx, const char *file, int line,
Willy Tarreau5242ef82017-07-27 11:47:28 +02006867 char **err)
6868{
6869 if (too_many_args(1, args, err, NULL))
6870 return -1;
6871
6872 h2_settings_max_concurrent_streams = atoi(args[1]);
Willy Tarreau5a490b62019-01-31 10:39:51 +01006873 if ((int)h2_settings_max_concurrent_streams < 0) {
Willy Tarreau5242ef82017-07-27 11:47:28 +02006874 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6875 return -1;
6876 }
6877 return 0;
6878}
6879
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006880/* config parser for global "tune.h2.max-frame-size" */
6881static int h2_parse_max_frame_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006882 const struct proxy *defpx, const char *file, int line,
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006883 char **err)
6884{
6885 if (too_many_args(1, args, err, NULL))
6886 return -1;
6887
6888 h2_settings_max_frame_size = atoi(args[1]);
6889 if (h2_settings_max_frame_size < 16384 || h2_settings_max_frame_size > 16777215) {
6890 memprintf(err, "'%s' expects a numeric value between 16384 and 16777215.", args[0]);
6891 return -1;
6892 }
6893 return 0;
6894}
6895
Willy Tarreau62f52692017-10-08 23:01:42 +02006896
6897/****************************************/
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05006898/* MUX initialization and instantiation */
Willy Tarreau62f52692017-10-08 23:01:42 +02006899/***************************************/
6900
6901/* The mux operations */
Willy Tarreau680b2bd2018-11-27 07:30:17 +01006902static const struct mux_ops h2_ops = {
Willy Tarreau62f52692017-10-08 23:01:42 +02006903 .init = h2_init,
Olivier Houchard21df6cc2018-09-14 23:21:44 +02006904 .wake = h2_wake,
Willy Tarreau62f52692017-10-08 23:01:42 +02006905 .snd_buf = h2_snd_buf,
Olivier Houchard511efea2018-08-16 15:30:32 +02006906 .rcv_buf = h2_rcv_buf,
Olivier Houchard6ff20392018-07-17 18:46:31 +02006907 .subscribe = h2_subscribe,
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006908 .unsubscribe = h2_unsubscribe,
Willy Tarreau62f52692017-10-08 23:01:42 +02006909 .attach = h2_attach,
Willy Tarreaufafd3982018-11-18 21:29:20 +01006910 .get_first_cs = h2_get_first_cs,
Willy Tarreau62f52692017-10-08 23:01:42 +02006911 .detach = h2_detach,
Olivier Houchard060ed432018-11-06 16:32:42 +01006912 .destroy = h2_destroy,
Olivier Houchardd540b362018-11-05 18:37:53 +01006913 .avail_streams = h2_avail_streams,
Willy Tarreau00f18a32019-01-26 12:19:01 +01006914 .used_streams = h2_used_streams,
Willy Tarreau62f52692017-10-08 23:01:42 +02006915 .shutr = h2_shutr,
6916 .shutw = h2_shutw,
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02006917 .ctl = h2_ctl,
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006918 .show_fd = h2_show_fd,
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006919 .takeover = h2_takeover,
Christopher Fauleta4600572021-03-08 15:28:28 +01006920 .flags = MX_FL_CLEAN_ABRT|MX_FL_HTX|MX_FL_HOL_RISK|MX_FL_NO_UPG,
Willy Tarreau62f52692017-10-08 23:01:42 +02006921 .name = "H2",
6922};
6923
Christopher Faulet32f61c02018-04-10 14:33:41 +02006924static struct mux_proto_list mux_proto_h2 =
Christopher Fauletc985f6c2019-07-15 11:42:52 +02006925 { .token = IST("h2"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BOTH, .mux = &h2_ops };
Willy Tarreau62f52692017-10-08 23:01:42 +02006926
Willy Tarreau0108d902018-11-25 19:14:37 +01006927INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2);
6928
Willy Tarreau62f52692017-10-08 23:01:42 +02006929/* config keyword parsers */
6930static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006931 { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size },
Willy Tarreaue6baec02017-07-27 11:45:11 +02006932 { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size },
Willy Tarreau5242ef82017-07-27 11:47:28 +02006933 { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006934 { CFG_GLOBAL, "tune.h2.max-frame-size", h2_parse_max_frame_size },
Willy Tarreau62f52692017-10-08 23:01:42 +02006935 { 0, NULL, NULL }
6936}};
6937
Willy Tarreau0108d902018-11-25 19:14:37 +01006938INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
Willy Tarreau2bdcc702020-05-19 11:31:11 +02006939
6940/* initialize internal structs after the config is parsed.
6941 * Returns zero on success, non-zero on error.
6942 */
6943static int init_h2()
6944{
6945 pool_head_hpack_tbl = create_pool("hpack_tbl",
6946 h2_settings_header_table_size,
6947 MEM_F_SHARED|MEM_F_EXACT);
Christopher Faulet52140992020-11-06 15:23:39 +01006948 if (!pool_head_hpack_tbl) {
6949 ha_alert("failed to allocate hpack_tbl memory pool\n");
6950 return (ERR_ALERT | ERR_FATAL);
6951 }
6952 return ERR_NONE;
Willy Tarreau2bdcc702020-05-19 11:31:11 +02006953}
6954
6955REGISTER_POST_CHECK(init_h2);