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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
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020061
Willy Tarreau081d4722017-05-16 21:51:05 +020062/* other flags */
Willy Tarreauf2101912018-07-19 10:11:38 +020063#define H2_CF_GOAWAY_SENT 0x00001000 // a GOAWAY frame was successfully sent
64#define H2_CF_GOAWAY_FAILED 0x00002000 // a GOAWAY frame failed to be sent
65#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 +020066#define H2_CF_IS_BACK 0x00008000 // this is an outgoing connection
Willy Tarreau3d4631f2021-01-20 10:53:13 +010067#define H2_CF_WINDOW_OPENED 0x00010000 // demux increased window already advertised
68#define H2_CF_RCVD_SHUT 0x00020000 // a recv() attempt already failed on a shutdown
69#define H2_CF_END_REACHED 0x00040000 // pending data too short with RCVD_SHUT present
Willy Tarreau081d4722017-05-16 21:51:05 +020070
Willy Tarreau5ab6b572017-09-22 08:05:00 +020071/* H2 connection state, in h2c->st0 */
72enum h2_cs {
73 H2_CS_PREFACE, // init done, waiting for connection preface
74 H2_CS_SETTINGS1, // preface OK, waiting for first settings frame
75 H2_CS_FRAME_H, // first settings frame ok, waiting for frame header
76 H2_CS_FRAME_P, // frame header OK, waiting for frame payload
Willy Tarreaua20a5192017-12-27 11:02:06 +010077 H2_CS_FRAME_A, // frame payload OK, trying to send ACK frame
78 H2_CS_FRAME_E, // frame payload OK, trying to send RST frame
Willy Tarreau5ab6b572017-09-22 08:05:00 +020079 H2_CS_ERROR, // send GOAWAY(errcode) and close the connection ASAP
80 H2_CS_ERROR2, // GOAWAY(errcode) sent, close the connection ASAP
81 H2_CS_ENTRIES // must be last
82} __attribute__((packed));
83
Willy Tarreau51330962019-05-26 09:38:07 +020084
Willy Tarreau9c218e72019-05-26 10:08:28 +020085/* 32 buffers: one for the ring's root, rest for the mbuf itself */
86#define H2C_MBUF_CNT 32
Willy Tarreau51330962019-05-26 09:38:07 +020087
Willy Tarreau5ab6b572017-09-22 08:05:00 +020088/* H2 connection descriptor */
89struct h2c {
90 struct connection *conn;
91
92 enum h2_cs st0; /* mux state */
93 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
94
95 /* 16 bit hole here */
96 uint32_t flags; /* connection flags: H2_CF_* */
Willy Tarreau2e2083a2019-01-31 10:34:07 +010097 uint32_t streams_limit; /* maximum number of concurrent streams the peer supports */
Willy Tarreau5ab6b572017-09-22 08:05:00 +020098 int32_t max_id; /* highest ID known on this connection, <0 before preface */
99 uint32_t rcvd_c; /* newly received data to ACK for the connection */
100 uint32_t rcvd_s; /* newly received data to ACK for the current stream (dsi) */
101
102 /* states for the demux direction */
103 struct hpack_dht *ddht; /* demux dynamic header table */
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200104 struct buffer dbuf; /* demux buffer */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200105
106 int32_t dsi; /* demux stream ID (<0 = idle) */
107 int32_t dfl; /* demux frame length (if dsi >= 0) */
108 int8_t dft; /* demux frame type (if dsi >= 0) */
109 int8_t dff; /* demux frame flags (if dsi >= 0) */
Willy Tarreau05e5daf2017-12-11 15:17:36 +0100110 uint8_t dpl; /* demux pad length (part of dfl), init to 0 */
111 /* 8 bit hole here */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200112 int32_t last_sid; /* last processed stream ID for GOAWAY, <0 before preface */
113
114 /* states for the mux direction */
Willy Tarreau51330962019-05-26 09:38:07 +0200115 struct buffer mbuf[H2C_MBUF_CNT]; /* mux buffers (ring) */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200116 int32_t msi; /* mux stream ID (<0 = idle) */
117 int32_t mfl; /* mux frame length (if dsi >= 0) */
118 int8_t mft; /* mux frame type (if dsi >= 0) */
119 int8_t mff; /* mux frame flags (if dsi >= 0) */
120 /* 16 bit hole here */
121 int32_t miw; /* mux initial window size for all new streams */
122 int32_t mws; /* mux window size. Can be negative. */
123 int32_t mfs; /* mux's max frame size */
124
Willy Tarreauea392822017-10-31 10:02:25 +0100125 int timeout; /* idle timeout duration in ticks */
Willy Tarreau599391a2017-11-24 10:16:00 +0100126 int shut_timeout; /* idle timeout duration in ticks after GOAWAY was sent */
Willy Tarreau49745612017-12-03 18:56:02 +0100127 unsigned int nb_streams; /* number of streams in the tree */
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200128 unsigned int nb_cs; /* number of attached conn_streams */
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100129 unsigned int nb_reserved; /* number of reserved streams */
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100130 unsigned int stream_cnt; /* total number of streams seen */
Willy Tarreau0b37d652018-10-03 10:33:02 +0200131 struct proxy *proxy; /* the proxy this connection was created for */
Willy Tarreauea392822017-10-31 10:02:25 +0100132 struct task *task; /* timeout management task */
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100133 struct h2_counters *px_counters; /* h2 counters attached to proxy */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200134 struct eb_root streams_by_id; /* all active streams by their ID */
135 struct list send_list; /* list of blocked streams requesting to send */
136 struct list fctl_list; /* list of streams blocked by connection's fctl */
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200137 struct list blocked_list; /* list of streams blocked for other reasons (e.g. sfctl, dep) */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100138 struct buffer_wait buf_wait; /* wait list for buffer allocations */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200139 struct wait_event wait_event; /* To be used if we're waiting for I/Os */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200140};
141
Willy Tarreau18312642017-10-11 07:57:07 +0200142/* H2 stream state, in h2s->st */
143enum h2_ss {
144 H2_SS_IDLE = 0, // idle
145 H2_SS_RLOC, // reserved(local)
146 H2_SS_RREM, // reserved(remote)
147 H2_SS_OPEN, // open
148 H2_SS_HREM, // half-closed(remote)
149 H2_SS_HLOC, // half-closed(local)
Willy Tarreau96060ba2017-10-16 18:34:34 +0200150 H2_SS_ERROR, // an error needs to be sent using RST_STREAM
Willy Tarreau18312642017-10-11 07:57:07 +0200151 H2_SS_CLOSED, // closed
152 H2_SS_ENTRIES // must be last
153} __attribute__((packed));
154
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200155#define H2_SS_MASK(state) (1UL << (state))
156#define H2_SS_IDLE_BIT (1UL << H2_SS_IDLE)
157#define H2_SS_RLOC_BIT (1UL << H2_SS_RLOC)
158#define H2_SS_RREM_BIT (1UL << H2_SS_RREM)
159#define H2_SS_OPEN_BIT (1UL << H2_SS_OPEN)
160#define H2_SS_HREM_BIT (1UL << H2_SS_HREM)
161#define H2_SS_HLOC_BIT (1UL << H2_SS_HLOC)
162#define H2_SS_ERROR_BIT (1UL << H2_SS_ERROR)
163#define H2_SS_CLOSED_BIT (1UL << H2_SS_CLOSED)
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200164
Willy Tarreau18312642017-10-11 07:57:07 +0200165/* HTTP/2 stream flags (32 bit), in h2s->flags */
166#define H2_SF_NONE 0x00000000
167#define H2_SF_ES_RCVD 0x00000001
168#define H2_SF_ES_SENT 0x00000002
169
170#define H2_SF_RST_RCVD 0x00000004 // received RST_STREAM
171#define H2_SF_RST_SENT 0x00000008 // sent RST_STREAM
172
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200173/* stream flags indicating the reason the stream is blocked */
174#define H2_SF_BLK_MBUSY 0x00000010 // blocked waiting for mux access (transient)
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200175#define H2_SF_BLK_MROOM 0x00000020 // blocked waiting for room in the mux (must be in send list)
176#define H2_SF_BLK_MFCTL 0x00000040 // blocked due to mux fctl (must be in fctl list)
177#define H2_SF_BLK_SFCTL 0x00000080 // blocked due to stream fctl (must be in blocked list)
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200178#define H2_SF_BLK_ANY 0x000000F0 // any of the reasons above
179
Willy Tarreau454f9052017-10-26 19:40:35 +0200180/* stream flags indicating how data is supposed to be sent */
181#define H2_SF_DATA_CLEN 0x00000100 // data sent using content-length
Christopher Fauletd0db4232021-01-22 11:46:30 +0100182/* unused flags: 0x00000200 */
183#define H2_SF_BODY_TUNNEL 0x00000400 // Attempt to establish a Tunnelled stream (the result depends on the status code)
184
Willy Tarreau454f9052017-10-26 19:40:35 +0200185
Willy Tarreaud9464162020-01-10 18:25:07 +0100186#define H2_SF_NOTIFIED 0x00000800 // a paused stream was notified to try to send again
Willy Tarreau67434202017-11-06 20:20:51 +0100187#define H2_SF_HEADERS_SENT 0x00001000 // a HEADERS frame was sent for this stream
Willy Tarreauc4312d32017-11-07 12:01:53 +0100188#define H2_SF_OUTGOING_DATA 0x00002000 // set whenever we've seen outgoing data
Willy Tarreau67434202017-11-06 20:20:51 +0100189
Willy Tarreau6cc85a52019-01-02 15:49:20 +0100190#define H2_SF_HEADERS_RCVD 0x00004000 // a HEADERS frame was received for this stream
191
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200192#define H2_SF_WANT_SHUTR 0x00008000 // a stream couldn't shutr() (mux full/busy)
193#define H2_SF_WANT_SHUTW 0x00010000 // a stream couldn't shutw() (mux full/busy)
Willy Tarreau3cf69fe2019-05-14 10:44:40 +0200194#define H2_SF_KILL_CONN 0x00020000 // kill the whole connection with this stream
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200195
Christopher Fauletd0db4232021-01-22 11:46:30 +0100196#define H2_SF_TUNNEL_ABRT 0x00100000 // A tunnel attempt was aborted
197
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200198
Willy Tarreau18312642017-10-11 07:57:07 +0200199/* H2 stream descriptor, describing the stream as it appears in the H2C, and as
Christopher Fauletfafd1b02020-11-03 18:25:52 +0100200 * it is being processed in the internal HTTP representation (HTX).
Willy Tarreau18312642017-10-11 07:57:07 +0200201 */
202struct h2s {
203 struct conn_stream *cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +0100204 struct session *sess;
Willy Tarreau18312642017-10-11 07:57:07 +0200205 struct h2c *h2c;
Willy Tarreau18312642017-10-11 07:57:07 +0200206 struct eb32_node by_id; /* place in h2c's streams_by_id */
Willy Tarreau18312642017-10-11 07:57:07 +0200207 int32_t id; /* stream ID */
208 uint32_t flags; /* H2_SF_* */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +0200209 int sws; /* stream window size, to be added to the mux's initial window size */
Willy Tarreau18312642017-10-11 07:57:07 +0200210 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
211 enum h2_ss st;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +0200212 uint16_t status; /* HTTP response status */
Willy Tarreau1915ca22019-01-24 11:49:37 +0100213 unsigned long long body_len; /* remaining body length according to content-length if H2_SF_DATA_CLEN */
Olivier Houchard638b7992018-08-16 15:41:52 +0200214 struct buffer rxbuf; /* receive buffer, always valid (buf_empty or real buffer) */
Willy Tarreauf96508a2020-01-10 11:12:48 +0100215 struct wait_event *subs; /* recv wait_event the conn_stream associated is waiting on (via h2_subscribe) */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200216 struct list list; /* To be used when adding in h2c->send_list or h2c->fctl_lsit */
Willy Tarreau5723f292020-01-10 15:16:57 +0100217 struct tasklet *shut_tl; /* deferred shutdown tasklet, to retry to send an RST after we failed to,
218 * in case there's no other subscription to do it */
Willy Tarreau18312642017-10-11 07:57:07 +0200219};
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200220
Willy Tarreauc6405142017-09-21 20:23:50 +0200221/* descriptor for an h2 frame header */
222struct h2_fh {
223 uint32_t len; /* length, host order, 24 bits */
224 uint32_t sid; /* stream id, host order, 31 bits */
225 uint8_t ft; /* frame type */
226 uint8_t ff; /* frame flags */
227};
228
Willy Tarreau12ae2122019-08-08 18:23:12 +0200229/* trace source and events */
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200230static void h2_trace(enum trace_level level, uint64_t mask, \
231 const struct trace_source *src,
232 const struct ist where, const struct ist func,
233 const void *a1, const void *a2, const void *a3, const void *a4);
Willy Tarreau12ae2122019-08-08 18:23:12 +0200234
235/* The event representation is split like this :
236 * strm - application layer
237 * h2s - internal H2 stream
238 * h2c - internal H2 connection
239 * conn - external connection
240 *
241 */
242static const struct trace_event h2_trace_events[] = {
243#define H2_EV_H2C_NEW (1ULL << 0)
Willy Tarreau87951942019-08-30 07:34:36 +0200244 { .mask = H2_EV_H2C_NEW, .name = "h2c_new", .desc = "new H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200245#define H2_EV_H2C_RECV (1ULL << 1)
Willy Tarreau87951942019-08-30 07:34:36 +0200246 { .mask = H2_EV_H2C_RECV, .name = "h2c_recv", .desc = "Rx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200247#define H2_EV_H2C_SEND (1ULL << 2)
Willy Tarreau87951942019-08-30 07:34:36 +0200248 { .mask = H2_EV_H2C_SEND, .name = "h2c_send", .desc = "Tx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200249#define H2_EV_H2C_FCTL (1ULL << 3)
Willy Tarreau87951942019-08-30 07:34:36 +0200250 { .mask = H2_EV_H2C_FCTL, .name = "h2c_fctl", .desc = "H2 connection flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200251#define H2_EV_H2C_BLK (1ULL << 4)
Willy Tarreau87951942019-08-30 07:34:36 +0200252 { .mask = H2_EV_H2C_BLK, .name = "h2c_blk", .desc = "H2 connection blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200253#define H2_EV_H2C_WAKE (1ULL << 5)
Willy Tarreau87951942019-08-30 07:34:36 +0200254 { .mask = H2_EV_H2C_WAKE, .name = "h2c_wake", .desc = "H2 connection woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200255#define H2_EV_H2C_END (1ULL << 6)
Willy Tarreau87951942019-08-30 07:34:36 +0200256 { .mask = H2_EV_H2C_END, .name = "h2c_end", .desc = "H2 connection terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200257#define H2_EV_H2C_ERR (1ULL << 7)
Willy Tarreau87951942019-08-30 07:34:36 +0200258 { .mask = H2_EV_H2C_ERR, .name = "h2c_err", .desc = "error on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200259#define H2_EV_RX_FHDR (1ULL << 8)
Willy Tarreau87951942019-08-30 07:34:36 +0200260 { .mask = H2_EV_RX_FHDR, .name = "rx_fhdr", .desc = "H2 frame header received" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200261#define H2_EV_RX_FRAME (1ULL << 9)
Willy Tarreau87951942019-08-30 07:34:36 +0200262 { .mask = H2_EV_RX_FRAME, .name = "rx_frame", .desc = "receipt of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200263#define H2_EV_RX_EOI (1ULL << 10)
Willy Tarreau87951942019-08-30 07:34:36 +0200264 { .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 +0200265#define H2_EV_RX_PREFACE (1ULL << 11)
Willy Tarreau87951942019-08-30 07:34:36 +0200266 { .mask = H2_EV_RX_PREFACE, .name = "rx_preface", .desc = "receipt of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200267#define H2_EV_RX_DATA (1ULL << 12)
Willy Tarreau87951942019-08-30 07:34:36 +0200268 { .mask = H2_EV_RX_DATA, .name = "rx_data", .desc = "receipt of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200269#define H2_EV_RX_HDR (1ULL << 13)
Willy Tarreau87951942019-08-30 07:34:36 +0200270 { .mask = H2_EV_RX_HDR, .name = "rx_hdr", .desc = "receipt of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200271#define H2_EV_RX_PRIO (1ULL << 14)
Willy Tarreau87951942019-08-30 07:34:36 +0200272 { .mask = H2_EV_RX_PRIO, .name = "rx_prio", .desc = "receipt of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200273#define H2_EV_RX_RST (1ULL << 15)
Willy Tarreau87951942019-08-30 07:34:36 +0200274 { .mask = H2_EV_RX_RST, .name = "rx_rst", .desc = "receipt of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200275#define H2_EV_RX_SETTINGS (1ULL << 16)
Willy Tarreau87951942019-08-30 07:34:36 +0200276 { .mask = H2_EV_RX_SETTINGS, .name = "rx_settings", .desc = "receipt of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200277#define H2_EV_RX_PUSH (1ULL << 17)
Willy Tarreau87951942019-08-30 07:34:36 +0200278 { .mask = H2_EV_RX_PUSH, .name = "rx_push", .desc = "receipt of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200279#define H2_EV_RX_PING (1ULL << 18)
Willy Tarreau87951942019-08-30 07:34:36 +0200280 { .mask = H2_EV_RX_PING, .name = "rx_ping", .desc = "receipt of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200281#define H2_EV_RX_GOAWAY (1ULL << 19)
Willy Tarreau87951942019-08-30 07:34:36 +0200282 { .mask = H2_EV_RX_GOAWAY, .name = "rx_goaway", .desc = "receipt of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200283#define H2_EV_RX_WU (1ULL << 20)
Willy Tarreau87951942019-08-30 07:34:36 +0200284 { .mask = H2_EV_RX_WU, .name = "rx_wu", .desc = "receipt of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200285#define H2_EV_RX_CONT (1ULL << 21)
Willy Tarreau87951942019-08-30 07:34:36 +0200286 { .mask = H2_EV_RX_CONT, .name = "rx_cont", .desc = "receipt of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200287#define H2_EV_TX_FRAME (1ULL << 22)
Willy Tarreau87951942019-08-30 07:34:36 +0200288 { .mask = H2_EV_TX_FRAME, .name = "tx_frame", .desc = "transmission of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200289#define H2_EV_TX_EOI (1ULL << 23)
Willy Tarreau87951942019-08-30 07:34:36 +0200290 { .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 +0200291#define H2_EV_TX_PREFACE (1ULL << 24)
Willy Tarreau87951942019-08-30 07:34:36 +0200292 { .mask = H2_EV_TX_PREFACE, .name = "tx_preface", .desc = "transmission of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200293#define H2_EV_TX_DATA (1ULL << 25)
Willy Tarreau87951942019-08-30 07:34:36 +0200294 { .mask = H2_EV_TX_DATA, .name = "tx_data", .desc = "transmission of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200295#define H2_EV_TX_HDR (1ULL << 26)
Willy Tarreau87951942019-08-30 07:34:36 +0200296 { .mask = H2_EV_TX_HDR, .name = "tx_hdr", .desc = "transmission of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200297#define H2_EV_TX_PRIO (1ULL << 27)
Willy Tarreau87951942019-08-30 07:34:36 +0200298 { .mask = H2_EV_TX_PRIO, .name = "tx_prio", .desc = "transmission of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200299#define H2_EV_TX_RST (1ULL << 28)
Willy Tarreau87951942019-08-30 07:34:36 +0200300 { .mask = H2_EV_TX_RST, .name = "tx_rst", .desc = "transmission of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200301#define H2_EV_TX_SETTINGS (1ULL << 29)
Willy Tarreau87951942019-08-30 07:34:36 +0200302 { .mask = H2_EV_TX_SETTINGS, .name = "tx_settings", .desc = "transmission of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200303#define H2_EV_TX_PUSH (1ULL << 30)
Willy Tarreau87951942019-08-30 07:34:36 +0200304 { .mask = H2_EV_TX_PUSH, .name = "tx_push", .desc = "transmission of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200305#define H2_EV_TX_PING (1ULL << 31)
Willy Tarreau87951942019-08-30 07:34:36 +0200306 { .mask = H2_EV_TX_PING, .name = "tx_ping", .desc = "transmission of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200307#define H2_EV_TX_GOAWAY (1ULL << 32)
Willy Tarreau87951942019-08-30 07:34:36 +0200308 { .mask = H2_EV_TX_GOAWAY, .name = "tx_goaway", .desc = "transmission of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200309#define H2_EV_TX_WU (1ULL << 33)
Willy Tarreau87951942019-08-30 07:34:36 +0200310 { .mask = H2_EV_TX_WU, .name = "tx_wu", .desc = "transmission of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200311#define H2_EV_TX_CONT (1ULL << 34)
Willy Tarreau87951942019-08-30 07:34:36 +0200312 { .mask = H2_EV_TX_CONT, .name = "tx_cont", .desc = "transmission of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200313#define H2_EV_H2S_NEW (1ULL << 35)
Willy Tarreau87951942019-08-30 07:34:36 +0200314 { .mask = H2_EV_H2S_NEW, .name = "h2s_new", .desc = "new H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200315#define H2_EV_H2S_RECV (1ULL << 36)
Willy Tarreau87951942019-08-30 07:34:36 +0200316 { .mask = H2_EV_H2S_RECV, .name = "h2s_recv", .desc = "Rx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200317#define H2_EV_H2S_SEND (1ULL << 37)
Willy Tarreau87951942019-08-30 07:34:36 +0200318 { .mask = H2_EV_H2S_SEND, .name = "h2s_send", .desc = "Tx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200319#define H2_EV_H2S_FCTL (1ULL << 38)
Willy Tarreau87951942019-08-30 07:34:36 +0200320 { .mask = H2_EV_H2S_FCTL, .name = "h2s_fctl", .desc = "H2 stream flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200321#define H2_EV_H2S_BLK (1ULL << 39)
Willy Tarreau87951942019-08-30 07:34:36 +0200322 { .mask = H2_EV_H2S_BLK, .name = "h2s_blk", .desc = "H2 stream blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200323#define H2_EV_H2S_WAKE (1ULL << 40)
Willy Tarreau87951942019-08-30 07:34:36 +0200324 { .mask = H2_EV_H2S_WAKE, .name = "h2s_wake", .desc = "H2 stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200325#define H2_EV_H2S_END (1ULL << 41)
Willy Tarreau87951942019-08-30 07:34:36 +0200326 { .mask = H2_EV_H2S_END, .name = "h2s_end", .desc = "H2 stream terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200327#define H2_EV_H2S_ERR (1ULL << 42)
Willy Tarreau87951942019-08-30 07:34:36 +0200328 { .mask = H2_EV_H2S_ERR, .name = "h2s_err", .desc = "error on H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200329#define H2_EV_STRM_NEW (1ULL << 43)
Willy Tarreau87951942019-08-30 07:34:36 +0200330 { .mask = H2_EV_STRM_NEW, .name = "strm_new", .desc = "app-layer stream creation" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200331#define H2_EV_STRM_RECV (1ULL << 44)
Willy Tarreau87951942019-08-30 07:34:36 +0200332 { .mask = H2_EV_STRM_RECV, .name = "strm_recv", .desc = "receiving data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200333#define H2_EV_STRM_SEND (1ULL << 45)
Willy Tarreau87951942019-08-30 07:34:36 +0200334 { .mask = H2_EV_STRM_SEND, .name = "strm_send", .desc = "sending data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200335#define H2_EV_STRM_FULL (1ULL << 46)
Willy Tarreau87951942019-08-30 07:34:36 +0200336 { .mask = H2_EV_STRM_FULL, .name = "strm_full", .desc = "stream buffer full" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200337#define H2_EV_STRM_WAKE (1ULL << 47)
Willy Tarreau87951942019-08-30 07:34:36 +0200338 { .mask = H2_EV_STRM_WAKE, .name = "strm_wake", .desc = "stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200339#define H2_EV_STRM_SHUT (1ULL << 48)
Willy Tarreau87951942019-08-30 07:34:36 +0200340 { .mask = H2_EV_STRM_SHUT, .name = "strm_shut", .desc = "stream shutdown" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200341#define H2_EV_STRM_END (1ULL << 49)
Willy Tarreau87951942019-08-30 07:34:36 +0200342 { .mask = H2_EV_STRM_END, .name = "strm_end", .desc = "detaching app-layer stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200343#define H2_EV_STRM_ERR (1ULL << 50)
Willy Tarreau87951942019-08-30 07:34:36 +0200344 { .mask = H2_EV_STRM_ERR, .name = "strm_err", .desc = "stream error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200345#define H2_EV_PROTO_ERR (1ULL << 51)
Willy Tarreau87951942019-08-30 07:34:36 +0200346 { .mask = H2_EV_PROTO_ERR, .name = "proto_err", .desc = "protocol error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200347 { }
348};
349
350static const struct name_desc h2_trace_lockon_args[4] = {
351 /* arg1 */ { /* already used by the connection */ },
352 /* arg2 */ { .name="h2s", .desc="H2 stream" },
353 /* arg3 */ { },
354 /* arg4 */ { }
355};
356
357static const struct name_desc h2_trace_decoding[] = {
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200358#define H2_VERB_CLEAN 1
359 { .name="clean", .desc="only user-friendly stuff, generally suitable for level \"user\"" },
360#define H2_VERB_MINIMAL 2
Willy Tarreau12ae2122019-08-08 18:23:12 +0200361 { .name="minimal", .desc="report only h2c/h2s state and flags, no real decoding" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200362#define H2_VERB_SIMPLE 3
Willy Tarreau12ae2122019-08-08 18:23:12 +0200363 { .name="simple", .desc="add request/response status line or frame info when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200364#define H2_VERB_ADVANCED 4
Willy Tarreau12ae2122019-08-08 18:23:12 +0200365 { .name="advanced", .desc="add header fields or frame decoding when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200366#define H2_VERB_COMPLETE 5
Willy Tarreau12ae2122019-08-08 18:23:12 +0200367 { .name="complete", .desc="add full data dump when available" },
368 { /* end */ }
369};
370
371static struct trace_source trace_h2 = {
372 .name = IST("h2"),
373 .desc = "HTTP/2 multiplexer",
374 .arg_def = TRC_ARG1_CONN, // TRACE()'s first argument is always a connection
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200375 .default_cb = h2_trace,
Willy Tarreau12ae2122019-08-08 18:23:12 +0200376 .known_events = h2_trace_events,
377 .lockon_args = h2_trace_lockon_args,
378 .decoding = h2_trace_decoding,
379 .report_events = ~0, // report everything by default
380};
381
382#define TRACE_SOURCE &trace_h2
383INITCALL1(STG_REGISTER, trace_register_source, TRACE_SOURCE);
384
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100385/* h2 stats module */
386enum {
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100387 H2_ST_HEADERS_RCVD,
388 H2_ST_DATA_RCVD,
389 H2_ST_SETTINGS_RCVD,
390 H2_ST_RST_STREAM_RCVD,
391 H2_ST_GOAWAY_RCVD,
392
Amaury Denoyellea8879232020-10-27 17:16:03 +0100393 H2_ST_CONN_PROTO_ERR,
394 H2_ST_STRM_PROTO_ERR,
395 H2_ST_RST_STREAM_RESP,
396 H2_ST_GOAWAY_RESP,
397
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100398 H2_ST_OPEN_CONN,
399 H2_ST_OPEN_STREAM,
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100400 H2_ST_TOTAL_CONN,
401 H2_ST_TOTAL_STREAM,
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100402
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100403 H2_STATS_COUNT /* must be the last member of the enum */
404};
405
406static struct name_desc h2_stats[] = {
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100407 [H2_ST_HEADERS_RCVD] = { .name = "h2_headers_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100408 .desc = "Total number of received HEADERS frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100409 [H2_ST_DATA_RCVD] = { .name = "h2_data_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100410 .desc = "Total number of received DATA frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100411 [H2_ST_SETTINGS_RCVD] = { .name = "h2_settings_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100412 .desc = "Total number of received SETTINGS frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100413 [H2_ST_RST_STREAM_RCVD] = { .name = "h2_rst_stream_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100414 .desc = "Total number of received RST_STREAM frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100415 [H2_ST_GOAWAY_RCVD] = { .name = "h2_goaway_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100416 .desc = "Total number of received GOAWAY frames" },
Amaury Denoyellea8879232020-10-27 17:16:03 +0100417
418 [H2_ST_CONN_PROTO_ERR] = { .name = "h2_detected_conn_protocol_errors",
419 .desc = "Total number of connection protocol errors" },
420 [H2_ST_STRM_PROTO_ERR] = { .name = "h2_detected_strm_protocol_errors",
421 .desc = "Total number of stream protocol errors" },
422 [H2_ST_RST_STREAM_RESP] = { .name = "h2_rst_stream_resp",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100423 .desc = "Total number of RST_STREAM sent on detected error" },
Amaury Denoyellea8879232020-10-27 17:16:03 +0100424 [H2_ST_GOAWAY_RESP] = { .name = "h2_goaway_resp",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100425 .desc = "Total number of GOAWAY sent on detected error" },
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100426
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100427 [H2_ST_OPEN_CONN] = { .name = "h2_open_connections",
428 .desc = "Count of currently open connections" },
429 [H2_ST_OPEN_STREAM] = { .name = "h2_backend_open_streams",
430 .desc = "Count of currently open streams" },
431 [H2_ST_TOTAL_CONN] = { .name = "h2_open_connections",
432 .desc = "Total number of connections" },
433 [H2_ST_TOTAL_STREAM] = { .name = "h2_backend_open_streams",
434 .desc = "Total number of streams" },
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100435};
436
437static struct h2_counters {
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100438 long long headers_rcvd; /* total number of HEADERS frame received */
439 long long data_rcvd; /* total number of DATA frame received */
440 long long settings_rcvd; /* total number of SETTINGS frame received */
441 long long rst_stream_rcvd; /* total number of RST_STREAM frame received */
442 long long goaway_rcvd; /* total number of GOAWAY frame received */
Amaury Denoyellea8879232020-10-27 17:16:03 +0100443
444 long long conn_proto_err; /* total number of protocol errors detected */
445 long long strm_proto_err; /* total number of protocol errors detected */
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100446 long long rst_stream_resp; /* total number of RST_STREAM frame sent on error */
447 long long goaway_resp; /* total number of GOAWAY frame sent on error */
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100448
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100449 long long open_conns; /* count of currently open connections */
450 long long open_streams; /* count of currently open streams */
451 long long total_conns; /* total number of connections */
452 long long total_streams; /* total number of streams */
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100453} h2_counters;
454
455static void h2_fill_stats(void *data, struct field *stats)
456{
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100457 struct h2_counters *counters = data;
458
459 stats[H2_ST_HEADERS_RCVD] = mkf_u64(FN_COUNTER, counters->headers_rcvd);
460 stats[H2_ST_DATA_RCVD] = mkf_u64(FN_COUNTER, counters->data_rcvd);
461 stats[H2_ST_SETTINGS_RCVD] = mkf_u64(FN_COUNTER, counters->settings_rcvd);
462 stats[H2_ST_RST_STREAM_RCVD] = mkf_u64(FN_COUNTER, counters->rst_stream_rcvd);
463 stats[H2_ST_GOAWAY_RCVD] = mkf_u64(FN_COUNTER, counters->goaway_rcvd);
Amaury Denoyellea8879232020-10-27 17:16:03 +0100464
465 stats[H2_ST_CONN_PROTO_ERR] = mkf_u64(FN_COUNTER, counters->conn_proto_err);
466 stats[H2_ST_STRM_PROTO_ERR] = mkf_u64(FN_COUNTER, counters->strm_proto_err);
467 stats[H2_ST_RST_STREAM_RESP] = mkf_u64(FN_COUNTER, counters->rst_stream_resp);
468 stats[H2_ST_GOAWAY_RESP] = mkf_u64(FN_COUNTER, counters->goaway_resp);
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100469
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100470 stats[H2_ST_OPEN_CONN] = mkf_u64(FN_GAUGE, counters->open_conns);
471 stats[H2_ST_OPEN_STREAM] = mkf_u64(FN_GAUGE, counters->open_streams);
472 stats[H2_ST_TOTAL_CONN] = mkf_u64(FN_COUNTER, counters->total_conns);
473 stats[H2_ST_TOTAL_STREAM] = mkf_u64(FN_COUNTER, counters->total_streams);
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100474}
475
476static struct stats_module h2_stats_module = {
477 .name = "h2",
478 .fill_stats = h2_fill_stats,
479 .stats = h2_stats,
480 .stats_count = H2_STATS_COUNT,
481 .counters = &h2_counters,
482 .counters_size = sizeof(h2_counters),
483 .domain_flags = MK_STATS_PROXY_DOMAIN(STATS_PX_CAP_FE|STATS_PX_CAP_BE),
484 .clearable = 1,
485};
486
487INITCALL1(STG_REGISTER, stats_register_module, &h2_stats_module);
488
Willy Tarreau8ceae722018-11-26 11:58:30 +0100489/* the h2c connection pool */
490DECLARE_STATIC_POOL(pool_head_h2c, "h2c", sizeof(struct h2c));
491
492/* the h2s stream pool */
493DECLARE_STATIC_POOL(pool_head_h2s, "h2s", sizeof(struct h2s));
494
Willy Tarreaudc572362018-12-12 08:08:05 +0100495/* The default connection window size is 65535, it may only be enlarged using
496 * a WINDOW_UPDATE message. Since the window must never be larger than 2G-1,
497 * we'll pretend we already received the difference between the two to send
498 * an equivalent window update to enlarge it to 2G-1.
499 */
500#define H2_INITIAL_WINDOW_INCREMENT ((1U<<31)-1 - 65535)
501
Willy Tarreau455d5682019-05-24 19:42:18 +0200502/* maximum amount of data we're OK with re-aligning for buffer optimizations */
503#define MAX_DATA_REALIGN 1024
504
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200505/* a few settings from the global section */
506static int h2_settings_header_table_size = 4096; /* initial value */
Willy Tarreaue6baec02017-07-27 11:45:11 +0200507static int h2_settings_initial_window_size = 65535; /* initial value */
Willy Tarreau5a490b62019-01-31 10:39:51 +0100508static unsigned int h2_settings_max_concurrent_streams = 100;
Willy Tarreaua24b35c2019-02-21 13:24:36 +0100509static int h2_settings_max_frame_size = 0; /* unset */
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200510
Willy Tarreau2a856182017-05-16 15:20:39 +0200511/* a dmumy closed stream */
512static const struct h2s *h2_closed_stream = &(const struct h2s){
513 .cs = NULL,
514 .h2c = NULL,
515 .st = H2_SS_CLOSED,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100516 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreauab837502017-12-27 15:07:30 +0100517 .flags = H2_SF_RST_RCVD,
Willy Tarreau2a856182017-05-16 15:20:39 +0200518 .id = 0,
519};
520
Willy Tarreauecb9dcd2019-01-03 12:00:17 +0100521/* a dmumy closed stream returning a PROTOCOL_ERROR error */
522static const struct h2s *h2_error_stream = &(const struct h2s){
523 .cs = NULL,
524 .h2c = NULL,
525 .st = H2_SS_CLOSED,
526 .errcode = H2_ERR_PROTOCOL_ERROR,
527 .flags = 0,
528 .id = 0,
529};
530
Willy Tarreau8d0d58b2018-12-23 18:29:12 +0100531/* a dmumy closed stream returning a REFUSED_STREAM error */
532static const struct h2s *h2_refused_stream = &(const struct h2s){
533 .cs = NULL,
534 .h2c = NULL,
535 .st = H2_SS_CLOSED,
536 .errcode = H2_ERR_REFUSED_STREAM,
537 .flags = 0,
538 .id = 0,
539};
540
Willy Tarreau2a856182017-05-16 15:20:39 +0200541/* and a dummy idle stream for use with any unannounced stream */
542static const struct h2s *h2_idle_stream = &(const struct h2s){
543 .cs = NULL,
544 .h2c = NULL,
545 .st = H2_SS_IDLE,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100546 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreau2a856182017-05-16 15:20:39 +0200547 .id = 0,
548};
549
Olivier Houchard9f6af332018-05-25 14:04:04 +0200550static struct task *h2_timeout_task(struct task *t, void *context, unsigned short state);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +0200551static int h2_send(struct h2c *h2c);
552static int h2_recv(struct h2c *h2c);
Olivier Houchard7505f942018-08-21 18:10:44 +0200553static int h2_process(struct h2c *h2c);
Willy Tarreau691d5032021-01-20 14:55:01 +0100554/* h2_io_cb is exported to see it resolved in "show fd" */
555struct task *h2_io_cb(struct task *t, void *ctx, unsigned short state);
Willy Tarreau0b559072018-02-26 15:22:17 +0100556static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id);
Willy Tarreau4790f7c2019-01-24 11:33:02 +0100557static int h2c_decode_headers(struct h2c *h2c, struct buffer *rxbuf, uint32_t *flags, unsigned long long *body_len);
Willy Tarreaua56a6de2018-02-26 15:59:07 +0100558static int h2_frt_transfer_data(struct h2s *h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +0200559static struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned short state);
Olivier Houchardf502aca2018-12-14 19:42:40 +0100560static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess);
Willy Tarreau8b2757c2018-12-19 17:36:48 +0100561static void h2s_alert(struct h2s *h2s);
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200562
Willy Tarreauab2ec452019-08-30 07:07:08 +0200563/* returns a h2c state as an abbreviated 3-letter string, or "???" if unknown */
564static inline const char *h2c_st_to_str(enum h2_cs st)
565{
566 switch (st) {
567 case H2_CS_PREFACE: return "PRF";
568 case H2_CS_SETTINGS1: return "STG";
569 case H2_CS_FRAME_H: return "FRH";
570 case H2_CS_FRAME_P: return "FRP";
571 case H2_CS_FRAME_A: return "FRA";
572 case H2_CS_FRAME_E: return "FRE";
573 case H2_CS_ERROR: return "ERR";
574 case H2_CS_ERROR2: return "ER2";
575 default: return "???";
576 }
577}
578
579/* returns a h2s state as an abbreviated 3-letter string, or "???" if unknown */
580static inline const char *h2s_st_to_str(enum h2_ss st)
581{
582 switch (st) {
583 case H2_SS_IDLE: return "IDL"; // idle
584 case H2_SS_RLOC: return "RSL"; // reserved local
585 case H2_SS_RREM: return "RSR"; // reserved remote
586 case H2_SS_OPEN: return "OPN"; // open
587 case H2_SS_HREM: return "HCR"; // half-closed remote
588 case H2_SS_HLOC: return "HCL"; // half-closed local
589 case H2_SS_ERROR : return "ERR"; // error
590 case H2_SS_CLOSED: return "CLO"; // closed
591 default: return "???";
592 }
593}
594
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200595/* the H2 traces always expect that arg1, if non-null, is of type connection
596 * (from which we can derive h2c), that arg2, if non-null, is of type h2s, and
597 * that arg3, if non-null, is either of type htx for tx headers, or of type
598 * buffer for everything else.
599 */
600static void h2_trace(enum trace_level level, uint64_t mask, const struct trace_source *src,
601 const struct ist where, const struct ist func,
602 const void *a1, const void *a2, const void *a3, const void *a4)
603{
604 const struct connection *conn = a1;
605 const struct h2c *h2c = conn ? conn->ctx : NULL;
606 const struct h2s *h2s = a2;
607 const struct buffer *buf = a3;
608 const struct htx *htx;
609 int pos;
610
611 if (!h2c) // nothing to add
612 return;
613
Willy Tarreau17104d42019-08-30 07:12:55 +0200614 if (src->verbosity > H2_VERB_CLEAN) {
Willy Tarreau73db4342019-09-25 07:28:44 +0200615 chunk_appendf(&trace_buf, " : h2c=%p(%c,%s)", h2c, conn_is_back(conn) ? 'B' : 'F', h2c_st_to_str(h2c->st0));
616
Willy Tarreauf3ce0412019-11-24 14:57:00 +0100617 if (h2c->errcode)
618 chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2c->errcode), h2c->errcode);
619
Willy Tarreau73db4342019-09-25 07:28:44 +0200620 if (h2c->dsi >= 0 &&
621 (mask & (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) == (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) {
Willy Tarreau8520d872020-09-18 07:39:29 +0200622 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 +0200623 }
624
625 if (h2s) {
626 if (h2s->id <= 0)
627 chunk_appendf(&trace_buf, " dsi=%d", h2c->dsi);
628 chunk_appendf(&trace_buf, " h2s=%p(%d,%s)", h2s, h2s->id, h2s_st_to_str(h2s->st));
Willy Tarreauf3ce0412019-11-24 14:57:00 +0100629 if (h2s->id && h2s->errcode)
630 chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2s->errcode), h2s->errcode);
Willy Tarreau73db4342019-09-25 07:28:44 +0200631 }
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200632 }
633
634 /* Let's dump decoded requests and responses right after parsing. They
635 * are traced at level USER with a few recognizable flags.
636 */
637 if ((mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW) ||
638 mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR)) && buf)
639 htx = htxbuf(buf); // recv req/res
640 else if (mask == (H2_EV_TX_FRAME|H2_EV_TX_HDR))
641 htx = a3; // send req/res
642 else
643 htx = NULL;
644
Willy Tarreau94f1dcf2019-08-30 07:11:30 +0200645 if (level == TRACE_LEVEL_USER && src->verbosity != H2_VERB_MINIMAL && htx && (pos = htx_get_head(htx)) != -1) {
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200646 const struct htx_blk *blk = htx_get_blk(htx, pos);
647 const struct htx_sl *sl = htx_get_blk_ptr(htx, blk);
648 enum htx_blk_type type = htx_get_blk_type(blk);
649
650 if (type == HTX_BLK_REQ_SL)
651 chunk_appendf(&trace_buf, " : [%d] H2 REQ: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200652 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200653 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
654 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
655 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
656 else if (type == HTX_BLK_RES_SL)
657 chunk_appendf(&trace_buf, " : [%d] H2 RES: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200658 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200659 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
660 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
661 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
662 }
663}
664
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200665
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100666/* Detect a pending read0 for a H2 connection. It happens if a read0 was
667 * already reported on a previous xprt->rcvbuf() AND a frame parser failed
668 * to parse pending data, confirming no more progress is possible because
669 * we're facing a truncated frame. The function returns 1 to report a read0
670 * or 0 otherwise.
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200671 */
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100672static inline int h2c_read0_pending(struct h2c *h2c)
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200673{
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100674 return !!(h2c->flags & H2_CF_END_REACHED);
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200675}
676
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200677/* returns true if the connection is allowed to expire, false otherwise. A
678 * connection may expire when:
679 * - it has no stream
680 * - it has data in the mux buffer
681 * - it has streams in the blocked list
682 * - it has streams in the fctl list
683 * - it has streams in the send list
684 * Otherwise it means some streams are waiting in the data layer and it should
685 * not expire.
686 */
687static inline int h2c_may_expire(const struct h2c *h2c)
688{
689 return eb_is_empty(&h2c->streams_by_id) ||
690 br_data(h2c->mbuf) ||
691 !LIST_ISEMPTY(&h2c->blocked_list) ||
692 !LIST_ISEMPTY(&h2c->fctl_list) ||
Willy Tarreaud9464162020-01-10 18:25:07 +0100693 !LIST_ISEMPTY(&h2c->send_list);
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200694}
695
Olivier Houchard7a977432019-03-21 15:47:13 +0100696static __inline int
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200697h2c_is_dead(const struct h2c *h2c)
Olivier Houchard7a977432019-03-21 15:47:13 +0100698{
699 if (eb_is_empty(&h2c->streams_by_id) && /* don't close if streams exist */
700 ((h2c->conn->flags & CO_FL_ERROR) || /* errors close immediately */
701 (h2c->st0 >= H2_CS_ERROR && !h2c->task) || /* a timeout stroke earlier */
702 (!(h2c->conn->owner)) || /* Nobody's left to take care of the connection, drop it now */
Willy Tarreau662fafc2019-05-26 09:43:07 +0200703 (!br_data(h2c->mbuf) && /* mux buffer empty, also process clean events below */
Olivier Houchard7a977432019-03-21 15:47:13 +0100704 (conn_xprt_read0_pending(h2c->conn) ||
705 (h2c->last_sid >= 0 && h2c->max_id >= h2c->last_sid)))))
706 return 1;
707
708 return 0;
Olivier Houchard7a977432019-03-21 15:47:13 +0100709}
710
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200711/*****************************************************/
712/* functions below are for dynamic buffer management */
713/*****************************************************/
714
Willy Tarreau315d8072017-12-10 22:17:57 +0100715/* indicates whether or not the we may call the h2_recv() function to attempt
716 * to receive data into the buffer and/or demux pending data. The condition is
717 * a bit complex due to some API limits for now. The rules are the following :
718 * - if an error or a shutdown was detected on the connection and the buffer
719 * is empty, we must not attempt to receive
720 * - if the demux buf failed to be allocated, we must not try to receive and
721 * we know there is nothing pending
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100722 * - if no flag indicates a blocking condition, we may attempt to receive,
723 * regardless of whether the demux buffer is full or not, so that only
724 * de demux part decides whether or not to block. This is needed because
725 * the connection API indeed prevents us from re-enabling receipt that is
726 * already enabled in a polled state, so we must always immediately stop
727 * as soon as the demux can't proceed so as never to hit an end of read
728 * with data pending in the buffers.
Willy Tarreau315d8072017-12-10 22:17:57 +0100729 * - otherwise must may not attempt
730 */
731static inline int h2_recv_allowed(const struct h2c *h2c)
732{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200733 if (b_data(&h2c->dbuf) == 0 &&
Willy Tarreau315d8072017-12-10 22:17:57 +0100734 (h2c->st0 >= H2_CS_ERROR ||
735 h2c->conn->flags & CO_FL_ERROR ||
736 conn_xprt_read0_pending(h2c->conn)))
737 return 0;
738
739 if (!(h2c->flags & H2_CF_DEM_DALLOC) &&
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100740 !(h2c->flags & H2_CF_DEM_BLOCK_ANY))
Willy Tarreau315d8072017-12-10 22:17:57 +0100741 return 1;
742
743 return 0;
744}
745
Willy Tarreau47b515a2018-12-21 16:09:41 +0100746/* restarts reading on the connection if it was not enabled */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200747static inline void h2c_restart_reading(const struct h2c *h2c, int consider_buffer)
Willy Tarreau47b515a2018-12-21 16:09:41 +0100748{
749 if (!h2_recv_allowed(h2c))
750 return;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200751 if ((!consider_buffer || !b_data(&h2c->dbuf))
752 && (h2c->wait_event.events & SUB_RETRY_RECV))
Willy Tarreau47b515a2018-12-21 16:09:41 +0100753 return;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200754 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau47b515a2018-12-21 16:09:41 +0100755}
756
757
Willy Tarreaufa1d3572019-01-31 10:31:51 +0100758/* returns true if the front connection has too many conn_streams attached */
759static inline int h2_frt_has_too_many_cs(const struct h2c *h2c)
Willy Tarreauf2101912018-07-19 10:11:38 +0200760{
Willy Tarreaua8754662018-12-23 20:43:58 +0100761 return h2c->nb_cs > h2_settings_max_concurrent_streams;
Willy Tarreauf2101912018-07-19 10:11:38 +0200762}
763
Willy Tarreau44e973f2018-03-01 17:49:30 +0100764/* Tries to grab a buffer and to re-enable processing on mux <target>. The h2c
765 * flags are used to figure what buffer was requested. It returns 1 if the
766 * allocation succeeds, in which case the connection is woken up, or 0 if it's
767 * impossible to wake up and we prefer to be woken up later.
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200768 */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100769static int h2_buf_available(void *target)
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200770{
771 struct h2c *h2c = target;
Willy Tarreau0b559072018-02-26 15:22:17 +0100772 struct h2s *h2s;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200773
Willy Tarreau44e973f2018-03-01 17:49:30 +0100774 if ((h2c->flags & H2_CF_DEM_DALLOC) && b_alloc_margin(&h2c->dbuf, 0)) {
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200775 h2c->flags &= ~H2_CF_DEM_DALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200776 h2c_restart_reading(h2c, 1);
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200777 return 1;
778 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200779
Willy Tarreau51330962019-05-26 09:38:07 +0200780 if ((h2c->flags & H2_CF_MUX_MALLOC) && b_alloc_margin(br_tail(h2c->mbuf), 0)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100781 h2c->flags &= ~H2_CF_MUX_MALLOC;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200782
783 if (h2c->flags & H2_CF_DEM_MROOM) {
784 h2c->flags &= ~H2_CF_DEM_MROOM;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200785 h2c_restart_reading(h2c, 1);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200786 }
Willy Tarreau14398122017-09-22 14:26:04 +0200787 return 1;
788 }
Willy Tarreau0b559072018-02-26 15:22:17 +0100789
790 if ((h2c->flags & H2_CF_DEM_SALLOC) &&
791 (h2s = h2c_st_by_id(h2c, h2c->dsi)) && h2s->cs &&
Olivier Houchard638b7992018-08-16 15:41:52 +0200792 b_alloc_margin(&h2s->rxbuf, 0)) {
Willy Tarreau0b559072018-02-26 15:22:17 +0100793 h2c->flags &= ~H2_CF_DEM_SALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200794 h2c_restart_reading(h2c, 1);
Willy Tarreau0b559072018-02-26 15:22:17 +0100795 return 1;
796 }
797
Willy Tarreau14398122017-09-22 14:26:04 +0200798 return 0;
799}
800
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200801static inline struct buffer *h2_get_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200802{
803 struct buffer *buf = NULL;
804
Willy Tarreau21046592020-02-26 10:39:36 +0100805 if (likely(!MT_LIST_ADDED(&h2c->buf_wait.list)) &&
Willy Tarreau44e973f2018-03-01 17:49:30 +0100806 unlikely((buf = b_alloc_margin(bptr, 0)) == NULL)) {
807 h2c->buf_wait.target = h2c;
808 h2c->buf_wait.wakeup_cb = h2_buf_available;
Willy Tarreau86891272020-07-10 08:22:26 +0200809 MT_LIST_ADDQ(&buffer_wq, &h2c->buf_wait.list);
Willy Tarreau14398122017-09-22 14:26:04 +0200810 }
811 return buf;
812}
813
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200814static inline void h2_release_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200815{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200816 if (bptr->size) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100817 b_free(bptr);
Willy Tarreau201840a2019-05-29 17:50:48 +0200818 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau14398122017-09-22 14:26:04 +0200819 }
820}
821
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200822static inline void h2_release_mbuf(struct h2c *h2c)
823{
824 struct buffer *buf;
825 unsigned int count = 0;
826
827 while (b_size(buf = br_head_pick(h2c->mbuf))) {
828 b_free(buf);
829 count++;
830 }
831 if (count)
Willy Tarreau201840a2019-05-29 17:50:48 +0200832 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200833}
834
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100835/* returns the number of allocatable outgoing streams for the connection taking
836 * the last_sid and the reserved ones into account.
837 */
838static inline int h2_streams_left(const struct h2c *h2c)
839{
840 int ret;
841
842 /* consider the number of outgoing streams we're allowed to create before
843 * reaching the last GOAWAY frame seen. max_id is the last assigned id,
844 * nb_reserved is the number of streams which don't yet have an ID.
845 */
846 ret = (h2c->last_sid >= 0) ? h2c->last_sid : 0x7FFFFFFF;
847 ret = (unsigned int)(ret - h2c->max_id) / 2 - h2c->nb_reserved - 1;
848 if (ret < 0)
849 ret = 0;
850 return ret;
851}
852
Willy Tarreau00f18a32019-01-26 12:19:01 +0100853/* returns the number of streams in use on a connection to figure if it's
854 * idle or not. We check nb_cs and not nb_streams as the caller will want
855 * to know if it was the last one after a detach().
856 */
857static int h2_used_streams(struct connection *conn)
858{
859 struct h2c *h2c = conn->ctx;
860
861 return h2c->nb_cs;
862}
863
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100864/* returns the number of concurrent streams available on the connection */
Olivier Houchardd540b362018-11-05 18:37:53 +0100865static int h2_avail_streams(struct connection *conn)
866{
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100867 struct server *srv = objt_server(conn->target);
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100868 struct h2c *h2c = conn->ctx;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100869 int ret1, ret2;
Olivier Houchardd540b362018-11-05 18:37:53 +0100870
Willy Tarreau6afec462019-01-28 06:40:19 +0100871 /* RFC7540#6.8: Receivers of a GOAWAY frame MUST NOT open additional
872 * streams on the connection.
873 */
874 if (h2c->last_sid >= 0)
875 return 0;
876
Willy Tarreauc61966f2019-10-31 15:10:03 +0100877 if (h2c->st0 >= H2_CS_ERROR)
878 return 0;
879
Willy Tarreau86949782019-01-31 10:42:05 +0100880 /* note: may be negative if a SETTINGS frame changes the limit */
881 ret1 = h2c->streams_limit - h2c->nb_streams;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100882
883 /* we must also consider the limit imposed by stream IDs */
884 ret2 = h2_streams_left(h2c);
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100885 ret1 = MIN(ret1, ret2);
Willy Tarreau86949782019-01-31 10:42:05 +0100886 if (ret1 > 0 && srv && srv->max_reuse >= 0) {
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100887 ret2 = h2c->stream_cnt <= srv->max_reuse ? srv->max_reuse - h2c->stream_cnt + 1: 0;
888 ret1 = MIN(ret1, ret2);
889 }
890 return ret1;
Olivier Houchardd540b362018-11-05 18:37:53 +0100891}
892
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200893
Willy Tarreau62f52692017-10-08 23:01:42 +0200894/*****************************************************************/
895/* functions below are dedicated to the mux setup and management */
896/*****************************************************************/
897
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200898/* Initialize the mux once it's attached. For outgoing connections, the context
899 * is already initialized before installing the mux, so we detect incoming
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200900 * connections from the fact that the context is still NULL (even during mux
901 * upgrades). <input> is always used as Input buffer and may contain data. It is
902 * the caller responsibility to not reuse it anymore. Returns < 0 on error.
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200903 */
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200904static int h2_init(struct connection *conn, struct proxy *prx, struct session *sess,
905 struct buffer *input)
Willy Tarreau32218eb2017-09-22 08:07:25 +0200906{
907 struct h2c *h2c;
Willy Tarreauea392822017-10-31 10:02:25 +0100908 struct task *t = NULL;
Christopher Fauletf81ef032019-10-04 15:19:43 +0200909 void *conn_ctx = conn->ctx;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200910
Christopher Fauletf81ef032019-10-04 15:19:43 +0200911 TRACE_ENTER(H2_EV_H2C_NEW);
Willy Tarreau7838a792019-08-12 18:42:03 +0200912
Willy Tarreaubafbe012017-11-24 17:34:44 +0100913 h2c = pool_alloc(pool_head_h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200914 if (!h2c)
mildiscd2d7de2018-10-02 16:44:18 +0200915 goto fail_no_h2c;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200916
Christopher Faulete9b70722019-04-08 10:46:02 +0200917 if (conn_is_back(conn)) {
Willy Tarreau01b44822018-10-03 14:26:37 +0200918 h2c->flags = H2_CF_IS_BACK;
919 h2c->shut_timeout = h2c->timeout = prx->timeout.server;
920 if (tick_isset(prx->timeout.serverfin))
921 h2c->shut_timeout = prx->timeout.serverfin;
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100922
923 h2c->px_counters = EXTRA_COUNTERS_GET(prx->extra_counters_be,
924 &h2_stats_module);
Willy Tarreau01b44822018-10-03 14:26:37 +0200925 } else {
926 h2c->flags = H2_CF_NONE;
927 h2c->shut_timeout = h2c->timeout = prx->timeout.client;
928 if (tick_isset(prx->timeout.clientfin))
929 h2c->shut_timeout = prx->timeout.clientfin;
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100930
931 h2c->px_counters = EXTRA_COUNTERS_GET(prx->extra_counters_fe,
932 &h2_stats_module);
Willy Tarreau01b44822018-10-03 14:26:37 +0200933 }
Willy Tarreau3f133572017-10-31 19:21:06 +0100934
Willy Tarreau0b37d652018-10-03 10:33:02 +0200935 h2c->proxy = prx;
Willy Tarreau33400292017-11-05 11:23:40 +0100936 h2c->task = NULL;
Willy Tarreau3f133572017-10-31 19:21:06 +0100937 if (tick_isset(h2c->timeout)) {
938 t = task_new(tid_bit);
939 if (!t)
940 goto fail;
941
942 h2c->task = t;
943 t->process = h2_timeout_task;
944 t->context = h2c;
945 t->expire = tick_add(now_ms, h2c->timeout);
946 }
Willy Tarreauea392822017-10-31 10:02:25 +0100947
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200948 h2c->wait_event.tasklet = tasklet_new();
949 if (!h2c->wait_event.tasklet)
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200950 goto fail;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200951 h2c->wait_event.tasklet->process = h2_io_cb;
952 h2c->wait_event.tasklet->context = h2c;
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100953 h2c->wait_event.events = 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200954
Willy Tarreau2bdcc702020-05-19 11:31:11 +0200955 h2c->ddht = hpack_dht_alloc();
Willy Tarreau32218eb2017-09-22 08:07:25 +0200956 if (!h2c->ddht)
957 goto fail;
958
959 /* Initialise the context. */
960 h2c->st0 = H2_CS_PREFACE;
961 h2c->conn = conn;
Willy Tarreau2e2083a2019-01-31 10:34:07 +0100962 h2c->streams_limit = h2_settings_max_concurrent_streams;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200963 h2c->max_id = -1;
964 h2c->errcode = H2_ERR_NO_ERROR;
Willy Tarreau97aaa672018-12-23 09:49:04 +0100965 h2c->rcvd_c = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200966 h2c->rcvd_s = 0;
Willy Tarreau49745612017-12-03 18:56:02 +0100967 h2c->nb_streams = 0;
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200968 h2c->nb_cs = 0;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100969 h2c->nb_reserved = 0;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100970 h2c->stream_cnt = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200971
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200972 h2c->dbuf = *input;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200973 h2c->dsi = -1;
974 h2c->msi = -1;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100975
Willy Tarreau32218eb2017-09-22 08:07:25 +0200976 h2c->last_sid = -1;
977
Willy Tarreau51330962019-05-26 09:38:07 +0200978 br_init(h2c->mbuf, sizeof(h2c->mbuf) / sizeof(h2c->mbuf[0]));
Willy Tarreau32218eb2017-09-22 08:07:25 +0200979 h2c->miw = 65535; /* mux initial window size */
980 h2c->mws = 65535; /* mux window size */
981 h2c->mfs = 16384; /* initial max frame size */
Willy Tarreau751f2d02018-10-05 09:35:00 +0200982 h2c->streams_by_id = EB_ROOT;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200983 LIST_INIT(&h2c->send_list);
984 LIST_INIT(&h2c->fctl_list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200985 LIST_INIT(&h2c->blocked_list);
Willy Tarreau21046592020-02-26 10:39:36 +0100986 MT_LIST_INIT(&h2c->buf_wait.list);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200987
Christopher Fauletf81ef032019-10-04 15:19:43 +0200988 conn->ctx = h2c;
989
Willy Tarreau3f133572017-10-31 19:21:06 +0100990 if (t)
991 task_queue(t);
Willy Tarreauea392822017-10-31 10:02:25 +0100992
Willy Tarreau01b44822018-10-03 14:26:37 +0200993 if (h2c->flags & H2_CF_IS_BACK) {
994 /* FIXME: this is temporary, for outgoing connections we need
995 * to immediately allocate a stream until the code is modified
996 * so that the caller calls ->attach(). For now the outgoing cs
Christopher Fauletf81ef032019-10-04 15:19:43 +0200997 * is stored as conn->ctx by the caller and saved in conn_ctx.
Willy Tarreau01b44822018-10-03 14:26:37 +0200998 */
999 struct h2s *h2s;
1000
Christopher Fauletf81ef032019-10-04 15:19:43 +02001001 h2s = h2c_bck_stream_new(h2c, conn_ctx, sess);
Willy Tarreau01b44822018-10-03 14:26:37 +02001002 if (!h2s)
1003 goto fail_stream;
1004 }
1005
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001006 HA_ATOMIC_ADD(&h2c->px_counters->open_conns, 1);
Amaury Denoyellee7b891f2020-11-03 15:04:45 +01001007 HA_ATOMIC_ADD(&h2c->px_counters->total_conns, 1);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001008
Willy Tarreau0f383582018-10-03 14:22:21 +02001009 /* prepare to read something */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02001010 h2c_restart_reading(h2c, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001011 TRACE_LEAVE(H2_EV_H2C_NEW, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001012 return 0;
Willy Tarreau01b44822018-10-03 14:26:37 +02001013 fail_stream:
1014 hpack_dht_free(h2c->ddht);
mildiscd2d7de2018-10-02 16:44:18 +02001015 fail:
Willy Tarreauf6562792019-05-07 19:05:35 +02001016 task_destroy(t);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001017 if (h2c->wait_event.tasklet)
1018 tasklet_free(h2c->wait_event.tasklet);
Willy Tarreaubafbe012017-11-24 17:34:44 +01001019 pool_free(pool_head_h2c, h2c);
mildiscd2d7de2018-10-02 16:44:18 +02001020 fail_no_h2c:
Christopher Fauletf81ef032019-10-04 15:19:43 +02001021 conn->ctx = conn_ctx; /* restore saved ctx */
1022 TRACE_DEVEL("leaving in error", H2_EV_H2C_NEW|H2_EV_H2C_END|H2_EV_H2C_ERR);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001023 return -1;
1024}
1025
Willy Tarreau751f2d02018-10-05 09:35:00 +02001026/* returns the next allocatable outgoing stream ID for the H2 connection, or
1027 * -1 if no more is allocatable.
1028 */
1029static inline int32_t h2c_get_next_sid(const struct h2c *h2c)
1030{
1031 int32_t id = (h2c->max_id + 1) | 1;
Willy Tarreaua80dca82019-01-24 17:08:28 +01001032
1033 if ((id & 0x80000000U) || (h2c->last_sid >= 0 && id > h2c->last_sid))
Willy Tarreau751f2d02018-10-05 09:35:00 +02001034 id = -1;
1035 return id;
1036}
1037
Willy Tarreau2373acc2017-10-12 17:35:14 +02001038/* returns the stream associated with id <id> or NULL if not found */
1039static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id)
1040{
1041 struct eb32_node *node;
1042
Willy Tarreau751f2d02018-10-05 09:35:00 +02001043 if (id == 0)
1044 return (struct h2s *)h2_closed_stream;
1045
Willy Tarreau2a856182017-05-16 15:20:39 +02001046 if (id > h2c->max_id)
1047 return (struct h2s *)h2_idle_stream;
1048
Willy Tarreau2373acc2017-10-12 17:35:14 +02001049 node = eb32_lookup(&h2c->streams_by_id, id);
1050 if (!node)
Willy Tarreau2a856182017-05-16 15:20:39 +02001051 return (struct h2s *)h2_closed_stream;
Willy Tarreau2373acc2017-10-12 17:35:14 +02001052
1053 return container_of(node, struct h2s, by_id);
1054}
1055
Christopher Faulet73c12072019-04-08 11:23:22 +02001056/* release function. This one should be called to free all resources allocated
1057 * to the mux.
Willy Tarreau62f52692017-10-08 23:01:42 +02001058 */
Christopher Faulet73c12072019-04-08 11:23:22 +02001059static void h2_release(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02001060{
William Dauchy477757c2020-08-07 22:19:23 +02001061 struct connection *conn = NULL;
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001062
Willy Tarreau7838a792019-08-12 18:42:03 +02001063 TRACE_ENTER(H2_EV_H2C_END);
1064
Willy Tarreau32218eb2017-09-22 08:07:25 +02001065 if (h2c) {
Christopher Faulet61840e72019-04-15 09:33:32 +02001066 /* The connection must be aattached to this mux to be released */
1067 if (h2c->conn && h2c->conn->ctx == h2c)
1068 conn = h2c->conn;
1069
Willy Tarreau7838a792019-08-12 18:42:03 +02001070 TRACE_DEVEL("freeing h2c", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001071 hpack_dht_free(h2c->ddht);
Willy Tarreau14398122017-09-22 14:26:04 +02001072
Willy Tarreau21046592020-02-26 10:39:36 +01001073 if (MT_LIST_ADDED(&h2c->buf_wait.list))
1074 MT_LIST_DEL(&h2c->buf_wait.list);
Willy Tarreau14398122017-09-22 14:26:04 +02001075
Willy Tarreau44e973f2018-03-01 17:49:30 +01001076 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau2e3c0002019-05-26 09:45:23 +02001077 h2_release_mbuf(h2c);
Willy Tarreau44e973f2018-03-01 17:49:30 +01001078
Willy Tarreauea392822017-10-31 10:02:25 +01001079 if (h2c->task) {
Willy Tarreau0975f112018-03-29 15:22:59 +02001080 h2c->task->context = NULL;
1081 task_wakeup(h2c->task, TASK_WOKEN_OTHER);
Willy Tarreauea392822017-10-31 10:02:25 +01001082 h2c->task = NULL;
1083 }
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001084 if (h2c->wait_event.tasklet)
1085 tasklet_free(h2c->wait_event.tasklet);
Christopher Faulet21d849f2019-09-18 11:07:20 +02001086 if (conn && h2c->wait_event.events != 0)
Olivier Houcharde179d0e2019-03-21 18:27:17 +01001087 conn->xprt->unsubscribe(conn, conn->xprt_ctx, h2c->wait_event.events,
Christopher Faulet21d849f2019-09-18 11:07:20 +02001088 &h2c->wait_event);
Willy Tarreauea392822017-10-31 10:02:25 +01001089
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001090 HA_ATOMIC_SUB(&h2c->px_counters->open_conns, 1);
1091
Willy Tarreaubafbe012017-11-24 17:34:44 +01001092 pool_free(pool_head_h2c, h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001093 }
1094
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001095 if (conn) {
1096 conn->mux = NULL;
1097 conn->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02001098 TRACE_DEVEL("freeing conn", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001099
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001100 conn_stop_tracking(conn);
1101 conn_full_close(conn);
1102 if (conn->destroy_cb)
1103 conn->destroy_cb(conn);
1104 conn_free(conn);
1105 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001106
1107 TRACE_LEAVE(H2_EV_H2C_END);
Willy Tarreau62f52692017-10-08 23:01:42 +02001108}
1109
1110
Willy Tarreau71681172017-10-23 14:39:06 +02001111/******************************************************/
1112/* functions below are for the H2 protocol processing */
1113/******************************************************/
1114
1115/* returns the stream if of stream <h2s> or 0 if <h2s> is NULL */
Willy Tarreau1f094672017-11-20 21:27:45 +01001116static inline __maybe_unused int h2s_id(const struct h2s *h2s)
Willy Tarreau71681172017-10-23 14:39:06 +02001117{
1118 return h2s ? h2s->id : 0;
1119}
1120
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001121/* returns the sum of the stream's own window size and the mux's initial
1122 * window, which together form the stream's effective window size.
1123 */
1124static inline int h2s_mws(const struct h2s *h2s)
1125{
1126 return h2s->sws + h2s->h2c->miw;
1127}
1128
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001129/* returns true of the mux is currently busy as seen from stream <h2s> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001130static inline __maybe_unused int h2c_mux_busy(const struct h2c *h2c, const struct h2s *h2s)
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001131{
1132 if (h2c->msi < 0)
1133 return 0;
1134
1135 if (h2c->msi == h2s_id(h2s))
1136 return 0;
1137
1138 return 1;
1139}
1140
Willy Tarreau741d6df2017-10-17 08:00:59 +02001141/* marks an error on the connection */
Willy Tarreau1f094672017-11-20 21:27:45 +01001142static inline __maybe_unused void h2c_error(struct h2c *h2c, enum h2_err err)
Willy Tarreau741d6df2017-10-17 08:00:59 +02001143{
Willy Tarreau022e5e52020-09-10 09:33:15 +02001144 TRACE_POINT(H2_EV_H2C_ERR, h2c->conn, 0, 0, (void *)(long)(err));
Willy Tarreau741d6df2017-10-17 08:00:59 +02001145 h2c->errcode = err;
1146 h2c->st0 = H2_CS_ERROR;
1147}
1148
Willy Tarreau175cebb2019-01-24 10:02:24 +01001149/* marks an error on the stream. It may also update an already closed stream
1150 * (e.g. to report an error after an RST was received).
1151 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001152static inline __maybe_unused void h2s_error(struct h2s *h2s, enum h2_err err)
Willy Tarreau2e43f082017-10-17 08:03:59 +02001153{
Willy Tarreau175cebb2019-01-24 10:02:24 +01001154 if (h2s->id && h2s->st != H2_SS_ERROR) {
Willy Tarreau022e5e52020-09-10 09:33:15 +02001155 TRACE_POINT(H2_EV_H2S_ERR, h2s->h2c->conn, h2s, 0, (void *)(long)(err));
Willy Tarreau2e43f082017-10-17 08:03:59 +02001156 h2s->errcode = err;
Willy Tarreau175cebb2019-01-24 10:02:24 +01001157 if (h2s->st < H2_SS_ERROR)
1158 h2s->st = H2_SS_ERROR;
Willy Tarreauec988c72018-12-19 18:00:29 +01001159 if (h2s->cs)
1160 cs_set_error(h2s->cs);
Willy Tarreau2e43f082017-10-17 08:03:59 +02001161 }
1162}
1163
Willy Tarreau7e094452018-12-19 18:08:52 +01001164/* attempt to notify the data layer of recv availability */
1165static void __maybe_unused h2s_notify_recv(struct h2s *h2s)
1166{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001167 if (h2s->subs && h2s->subs->events & SUB_RETRY_RECV) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001168 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01001169 tasklet_wakeup(h2s->subs->tasklet);
1170 h2s->subs->events &= ~SUB_RETRY_RECV;
1171 if (!h2s->subs->events)
1172 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001173 }
1174}
1175
1176/* attempt to notify the data layer of send availability */
1177static void __maybe_unused h2s_notify_send(struct h2s *h2s)
1178{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001179 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001180 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01001181 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01001182 tasklet_wakeup(h2s->subs->tasklet);
1183 h2s->subs->events &= ~SUB_RETRY_SEND;
1184 if (!h2s->subs->events)
1185 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001186 }
Willy Tarreau5723f292020-01-10 15:16:57 +01001187 else if (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) {
1188 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
1189 tasklet_wakeup(h2s->shut_tl);
1190 }
Willy Tarreau7e094452018-12-19 18:08:52 +01001191}
1192
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001193/* alerts the data layer, trying to wake it up by all means, following
1194 * this sequence :
1195 * - if the h2s' data layer is subscribed to recv, then it's woken up for recv
1196 * - if its subscribed to send, then it's woken up for send
1197 * - if it was subscribed to neither, its ->wake() callback is called
1198 * It is safe to call this function with a closed stream which doesn't have a
1199 * conn_stream anymore.
1200 */
1201static void __maybe_unused h2s_alert(struct h2s *h2s)
1202{
Willy Tarreau7838a792019-08-12 18:42:03 +02001203 TRACE_ENTER(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
1204
Willy Tarreauf96508a2020-01-10 11:12:48 +01001205 if (h2s->subs ||
Willy Tarreau5723f292020-01-10 15:16:57 +01001206 (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW))) {
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001207 h2s_notify_recv(h2s);
1208 h2s_notify_send(h2s);
1209 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001210 else if (h2s->cs && h2s->cs->data_cb->wake != NULL) {
1211 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001212 h2s->cs->data_cb->wake(h2s->cs);
Willy Tarreau7838a792019-08-12 18:42:03 +02001213 }
1214
1215 TRACE_LEAVE(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001216}
1217
Willy Tarreaue4820742017-07-27 13:37:23 +02001218/* writes the 24-bit frame size <len> at address <frame> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001219static inline __maybe_unused void h2_set_frame_size(void *frame, uint32_t len)
Willy Tarreaue4820742017-07-27 13:37:23 +02001220{
1221 uint8_t *out = frame;
1222
1223 *out = len >> 16;
1224 write_n16(out + 1, len);
1225}
1226
Willy Tarreau54c15062017-10-10 17:10:03 +02001227/* reads <bytes> bytes from buffer <b> starting at relative offset <o> from the
1228 * current pointer, dealing with wrapping, and stores the result in <dst>. It's
1229 * the caller's responsibility to verify that there are at least <bytes> bytes
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001230 * available in the buffer's input prior to calling this function. The buffer
1231 * is assumed not to hold any output data.
Willy Tarreau54c15062017-10-10 17:10:03 +02001232 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001233static inline __maybe_unused void h2_get_buf_bytes(void *dst, size_t bytes,
Willy Tarreau54c15062017-10-10 17:10:03 +02001234 const struct buffer *b, int o)
1235{
Willy Tarreau591d4452018-06-15 17:21:00 +02001236 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 +02001237}
1238
Willy Tarreau1f094672017-11-20 21:27:45 +01001239static inline __maybe_unused uint16_t h2_get_n16(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001240{
Willy Tarreau591d4452018-06-15 17:21:00 +02001241 return readv_n16(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001242}
1243
Willy Tarreau1f094672017-11-20 21:27:45 +01001244static inline __maybe_unused uint32_t h2_get_n32(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001245{
Willy Tarreau591d4452018-06-15 17:21:00 +02001246 return readv_n32(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001247}
1248
Willy Tarreau1f094672017-11-20 21:27:45 +01001249static inline __maybe_unused uint64_t h2_get_n64(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001250{
Willy Tarreau591d4452018-06-15 17:21:00 +02001251 return readv_n64(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001252}
1253
1254
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001255/* Peeks an H2 frame header from offset <o> of buffer <b> into descriptor <h>.
1256 * The algorithm is not obvious. It turns out that H2 headers are neither
1257 * aligned nor do they use regular sizes. And to add to the trouble, the buffer
1258 * may wrap so each byte read must be checked. The header is formed like this :
Willy Tarreau715d5312017-07-11 15:20:24 +02001259 *
1260 * b0 b1 b2 b3 b4 b5..b8
1261 * +----------+---------+--------+----+----+----------------------+
1262 * |len[23:16]|len[15:8]|len[7:0]|type|flag|sid[31:0] (big endian)|
1263 * +----------+---------+--------+----+----+----------------------+
1264 *
1265 * Here we read a big-endian 64 bit word from h[1]. This way in a single read
1266 * we get the sid properly aligned and ordered, and 16 bits of len properly
1267 * ordered as well. The type and flags can be extracted using bit shifts from
1268 * the word, and only one extra read is needed to fetch len[16:23].
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001269 * Returns zero if some bytes are missing, otherwise non-zero on success. The
1270 * buffer is assumed not to contain any output data.
Willy Tarreau715d5312017-07-11 15:20:24 +02001271 */
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001272static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, int o, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001273{
1274 uint64_t w;
1275
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001276 if (b_data(b) < o + 9)
Willy Tarreau715d5312017-07-11 15:20:24 +02001277 return 0;
1278
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001279 w = h2_get_n64(b, o + 1);
1280 h->len = *(uint8_t*)b_peek(b, o) << 16;
Willy Tarreau715d5312017-07-11 15:20:24 +02001281 h->sid = w & 0x7FFFFFFF; /* RFC7540#4.1: R bit must be ignored */
1282 h->ff = w >> 32;
1283 h->ft = w >> 40;
1284 h->len += w >> 48;
1285 return 1;
1286}
1287
1288/* skip the next 9 bytes corresponding to the frame header possibly parsed by
1289 * h2_peek_frame_hdr() above.
1290 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001291static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b)
Willy Tarreau715d5312017-07-11 15:20:24 +02001292{
Willy Tarreaue5f12ce2018-06-15 10:28:05 +02001293 b_del(b, 9);
Willy Tarreau715d5312017-07-11 15:20:24 +02001294}
1295
1296/* same as above, automatically advances the buffer on success */
Willy Tarreau1f094672017-11-20 21:27:45 +01001297static inline __maybe_unused int h2_get_frame_hdr(struct buffer *b, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001298{
1299 int ret;
1300
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001301 ret = h2_peek_frame_hdr(b, 0, h);
Willy Tarreau715d5312017-07-11 15:20:24 +02001302 if (ret > 0)
1303 h2_skip_frame_hdr(b);
1304 return ret;
1305}
1306
Willy Tarreaucb985a42019-10-07 16:56:34 +02001307
1308/* try to fragment the headers frame present at the beginning of buffer <b>,
1309 * enforcing a limit of <mfs> bytes per frame. Returns 0 on failure, 1 on
1310 * success. Typical causes of failure include a buffer not large enough to
1311 * add extra frame headers. The existing frame size is read in the current
1312 * frame. Its EH flag will be cleared if CONTINUATION frames need to be added,
1313 * and its length will be adjusted. The stream ID for continuation frames will
1314 * be copied from the initial frame's.
1315 */
1316static int h2_fragment_headers(struct buffer *b, uint32_t mfs)
1317{
1318 size_t remain = b->data - 9;
1319 int extra_frames = (remain - 1) / mfs;
1320 size_t fsize;
1321 char *fptr;
1322 int frame;
1323
1324 if (b->data <= mfs + 9)
1325 return 1;
1326
1327 /* Too large a frame, we need to fragment it using CONTINUATION
1328 * frames. We start from the end and move tails as needed.
1329 */
1330 if (b->data + extra_frames * 9 > b->size)
1331 return 0;
1332
1333 for (frame = extra_frames; frame; frame--) {
1334 fsize = ((remain - 1) % mfs) + 1;
1335 remain -= fsize;
1336
1337 /* move data */
1338 fptr = b->area + 9 + remain + (frame - 1) * 9;
1339 memmove(fptr + 9, b->area + 9 + remain, fsize);
1340 b->data += 9;
1341
1342 /* write new frame header */
1343 h2_set_frame_size(fptr, fsize);
1344 fptr[3] = H2_FT_CONTINUATION;
1345 fptr[4] = (frame == extra_frames) ? H2_F_HEADERS_END_HEADERS : 0;
1346 write_n32(fptr + 5, read_n32(b->area + 5));
1347 }
1348
1349 b->area[4] &= ~H2_F_HEADERS_END_HEADERS;
1350 h2_set_frame_size(b->area, remain);
1351 return 1;
1352}
1353
1354
Willy Tarreau00dd0782018-03-01 16:31:34 +01001355/* marks stream <h2s> as CLOSED and decrement the number of active streams for
1356 * its connection if the stream was not yet closed. Please use this exclusively
1357 * before closing a stream to ensure stream count is well maintained.
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001358 */
Willy Tarreau00dd0782018-03-01 16:31:34 +01001359static inline void h2s_close(struct h2s *h2s)
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001360{
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001361 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001362 TRACE_ENTER(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001363 h2s->h2c->nb_streams--;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001364 if (!h2s->id)
1365 h2s->h2c->nb_reserved--;
Willy Tarreaua27db382019-03-25 18:13:16 +01001366 if (h2s->cs) {
Willy Tarreaua27db382019-03-25 18:13:16 +01001367 if (!(h2s->cs->flags & CS_FL_EOS) && !b_data(&h2s->rxbuf))
1368 h2s_notify_recv(h2s);
1369 }
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001370 HA_ATOMIC_SUB(&h2s->h2c->px_counters->open_streams, 1);
1371
Willy Tarreau7838a792019-08-12 18:42:03 +02001372 TRACE_LEAVE(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001373 }
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001374 h2s->st = H2_SS_CLOSED;
1375}
1376
Willy Tarreau71049cc2018-03-28 13:56:39 +02001377/* detaches an H2 stream from its H2C and releases it to the H2S pool. */
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001378/* h2s_destroy should only ever be called by the thread that owns the stream,
1379 * that means that a tasklet should be used if we want to destroy the h2s
1380 * from another thread
1381 */
Willy Tarreau71049cc2018-03-28 13:56:39 +02001382static void h2s_destroy(struct h2s *h2s)
Willy Tarreau0a10de62018-03-01 16:27:53 +01001383{
Willy Tarreau7838a792019-08-12 18:42:03 +02001384 struct connection *conn = h2s->h2c->conn;
1385
1386 TRACE_ENTER(H2_EV_H2S_END, conn, h2s);
1387
Willy Tarreau0a10de62018-03-01 16:27:53 +01001388 h2s_close(h2s);
1389 eb32_delete(&h2s->by_id);
Olivier Houchard638b7992018-08-16 15:41:52 +02001390 if (b_size(&h2s->rxbuf)) {
1391 b_free(&h2s->rxbuf);
1392 offer_buffers(NULL, tasks_run_queue);
1393 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001394
1395 if (h2s->subs)
1396 h2s->subs->events = 0;
1397
Joseph Herlantd77575d2018-11-25 10:54:45 -08001398 /* There's no need to explicitly call unsubscribe here, the only
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001399 * reference left would be in the h2c send_list/fctl_list, and if
1400 * we're in it, we're getting out anyway
1401 */
Olivier Houchardd360ac62019-03-22 17:37:16 +01001402 LIST_DEL_INIT(&h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01001403
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001404 /* ditto, calling tasklet_free() here should be ok */
Willy Tarreau5723f292020-01-10 15:16:57 +01001405 tasklet_free(h2s->shut_tl);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001406 pool_free(pool_head_h2s, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001407
1408 TRACE_LEAVE(H2_EV_H2S_END, conn);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001409}
1410
Willy Tarreaua8e49542018-10-03 18:53:55 +02001411/* allocates a new stream <id> for connection <h2c> and adds it into h2c's
1412 * stream tree. In case of error, nothing is added and NULL is returned. The
1413 * causes of errors can be any failed memory allocation. The caller is
1414 * responsible for checking if the connection may support an extra stream
1415 * prior to calling this function.
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001416 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02001417static struct h2s *h2s_new(struct h2c *h2c, int id)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001418{
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001419 struct h2s *h2s;
1420
Willy Tarreau7838a792019-08-12 18:42:03 +02001421 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1422
Willy Tarreaubafbe012017-11-24 17:34:44 +01001423 h2s = pool_alloc(pool_head_h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001424 if (!h2s)
1425 goto out;
1426
Willy Tarreau5723f292020-01-10 15:16:57 +01001427 h2s->shut_tl = tasklet_new();
1428 if (!h2s->shut_tl) {
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001429 pool_free(pool_head_h2s, h2s);
1430 goto out;
1431 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001432 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01001433 h2s->shut_tl->process = h2_deferred_shut;
1434 h2s->shut_tl->context = h2s;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001435 LIST_INIT(&h2s->list);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001436 h2s->h2c = h2c;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001437 h2s->cs = NULL;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001438 h2s->sws = 0;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001439 h2s->flags = H2_SF_NONE;
1440 h2s->errcode = H2_ERR_NO_ERROR;
1441 h2s->st = H2_SS_IDLE;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02001442 h2s->status = 0;
Willy Tarreau1915ca22019-01-24 11:49:37 +01001443 h2s->body_len = 0;
Olivier Houchard638b7992018-08-16 15:41:52 +02001444 h2s->rxbuf = BUF_NULL;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001445
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001446 h2s->by_id.key = h2s->id = id;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001447 if (id > 0)
1448 h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001449 else
1450 h2c->nb_reserved++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001451
1452 eb32_insert(&h2c->streams_by_id, &h2s->by_id);
Willy Tarreau49745612017-12-03 18:56:02 +01001453 h2c->nb_streams++;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001454 h2c->stream_cnt++;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001455
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001456 HA_ATOMIC_ADD(&h2c->px_counters->open_streams, 1);
Amaury Denoyellee7b891f2020-11-03 15:04:45 +01001457 HA_ATOMIC_ADD(&h2c->px_counters->total_streams, 1);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001458
Willy Tarreau7838a792019-08-12 18:42:03 +02001459 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001460 return h2s;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001461 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001462 TRACE_DEVEL("leaving in error", H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001463 return NULL;
1464}
1465
1466/* creates a new stream <id> on the h2c connection and returns it, or NULL in
Christopher Faulet7d013e72020-12-15 16:56:50 +01001467 * case of memory allocation error. <input> is used as input buffer for the new
1468 * stream. On success, it is transferred to the stream and the mux is no longer
1469 * responsible of it. On error, <input> is unchanged, thus the mux must still
1470 * take care of it.
Willy Tarreaua8e49542018-10-03 18:53:55 +02001471 */
Christopher Faulet7d013e72020-12-15 16:56:50 +01001472static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id, struct buffer *input)
Willy Tarreaua8e49542018-10-03 18:53:55 +02001473{
1474 struct session *sess = h2c->conn->owner;
1475 struct conn_stream *cs;
1476 struct h2s *h2s;
1477
Willy Tarreau7838a792019-08-12 18:42:03 +02001478 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1479
Willy Tarreaua8e49542018-10-03 18:53:55 +02001480 if (h2c->nb_streams >= h2_settings_max_concurrent_streams)
1481 goto out;
1482
1483 h2s = h2s_new(h2c, id);
1484 if (!h2s)
1485 goto out;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001486
Christopher Faulet236c93b2020-07-02 09:19:54 +02001487 cs = cs_new(h2c->conn, h2c->conn->target);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001488 if (!cs)
1489 goto out_close;
1490
Olivier Houchard746fb772018-12-15 19:42:00 +01001491 cs->flags |= CS_FL_NOT_FIRST;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001492 h2s->cs = cs;
1493 cs->ctx = h2s;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001494 h2c->nb_cs++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001495
Christopher Faulet7d013e72020-12-15 16:56:50 +01001496 if (stream_create_from_cs(cs, input) < 0)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001497 goto out_free_cs;
1498
Willy Tarreau590a0512018-09-05 11:56:48 +02001499 /* We want the accept date presented to the next stream to be the one
1500 * we have now, the handshake time to be null (since the next stream
1501 * is not delayed by a handshake), and the idle time to count since
1502 * right now.
1503 */
1504 sess->accept_date = date;
1505 sess->tv_accept = now;
1506 sess->t_handshake = 0;
1507
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001508 /* OK done, the stream lives its own life now */
Willy Tarreaufa1d3572019-01-31 10:31:51 +01001509 if (h2_frt_has_too_many_cs(h2c))
Willy Tarreauf2101912018-07-19 10:11:38 +02001510 h2c->flags |= H2_CF_DEM_TOOMANY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001511 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001512 return h2s;
1513
1514 out_free_cs:
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001515 h2c->nb_cs--;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001516 cs_free(cs);
Olivier Houchard58d87f32019-05-29 16:44:17 +02001517 h2s->cs = NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001518 out_close:
Willy Tarreau71049cc2018-03-28 13:56:39 +02001519 h2s_destroy(h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001520 out:
Willy Tarreau45efc072018-10-03 18:27:52 +02001521 sess_log(sess);
Willy Tarreau7838a792019-08-12 18:42:03 +02001522 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreau45efc072018-10-03 18:27:52 +02001523 return NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001524}
1525
Willy Tarreau751f2d02018-10-05 09:35:00 +02001526/* allocates a new stream associated to conn_stream <cs> on the h2c connection
1527 * and returns it, or NULL in case of memory allocation error or if the highest
1528 * possible stream ID was reached.
1529 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01001530static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001531{
1532 struct h2s *h2s = NULL;
1533
Willy Tarreau7838a792019-08-12 18:42:03 +02001534 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1535
Willy Tarreau86949782019-01-31 10:42:05 +01001536 if (h2c->nb_streams >= h2c->streams_limit)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001537 goto out;
1538
Willy Tarreaua80dca82019-01-24 17:08:28 +01001539 if (h2_streams_left(h2c) < 1)
1540 goto out;
1541
Willy Tarreau751f2d02018-10-05 09:35:00 +02001542 /* Defer choosing the ID until we send the first message to create the stream */
1543 h2s = h2s_new(h2c, 0);
1544 if (!h2s)
1545 goto out;
1546
1547 h2s->cs = cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001548 h2s->sess = sess;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001549 cs->ctx = h2s;
1550 h2c->nb_cs++;
1551
Willy Tarreau751f2d02018-10-05 09:35:00 +02001552 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001553 if (likely(h2s))
1554 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
1555 else
1556 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn, h2s);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001557 return h2s;
1558}
1559
Willy Tarreaube5b7152017-09-25 16:25:39 +02001560/* try to send a settings frame on the connection. Returns > 0 on success, 0 if
1561 * it couldn't do anything. It may return an error in h2c. See RFC7540#11.3 for
1562 * the various settings codes.
1563 */
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001564static int h2c_send_settings(struct h2c *h2c)
Willy Tarreaube5b7152017-09-25 16:25:39 +02001565{
1566 struct buffer *res;
1567 char buf_data[100]; // enough for 15 settings
Willy Tarreau83061a82018-07-13 11:56:34 +02001568 struct buffer buf;
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001569 int mfs;
Willy Tarreau7838a792019-08-12 18:42:03 +02001570 int ret = 0;
1571
1572 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001573
1574 if (h2c_mux_busy(h2c, NULL)) {
1575 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001576 goto out;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001577 }
1578
Willy Tarreaube5b7152017-09-25 16:25:39 +02001579 chunk_init(&buf, buf_data, sizeof(buf_data));
1580 chunk_memcpy(&buf,
1581 "\x00\x00\x00" /* length : 0 for now */
1582 "\x04\x00" /* type : 4 (settings), flags : 0 */
1583 "\x00\x00\x00\x00", /* stream ID : 0 */
1584 9);
1585
Willy Tarreau0bbad6b2019-02-26 16:01:52 +01001586 if (h2c->flags & H2_CF_IS_BACK) {
1587 /* send settings_enable_push=0 */
1588 chunk_memcat(&buf, "\x00\x02\x00\x00\x00\x00", 6);
1589 }
1590
Willy Tarreaube5b7152017-09-25 16:25:39 +02001591 if (h2_settings_header_table_size != 4096) {
1592 char str[6] = "\x00\x01"; /* header_table_size */
1593
1594 write_n32(str + 2, h2_settings_header_table_size);
1595 chunk_memcat(&buf, str, 6);
1596 }
1597
1598 if (h2_settings_initial_window_size != 65535) {
1599 char str[6] = "\x00\x04"; /* initial_window_size */
1600
1601 write_n32(str + 2, h2_settings_initial_window_size);
1602 chunk_memcat(&buf, str, 6);
1603 }
1604
1605 if (h2_settings_max_concurrent_streams != 0) {
1606 char str[6] = "\x00\x03"; /* max_concurrent_streams */
1607
1608 /* Note: 0 means "unlimited" for haproxy's config but not for
1609 * the protocol, so never send this value!
1610 */
1611 write_n32(str + 2, h2_settings_max_concurrent_streams);
1612 chunk_memcat(&buf, str, 6);
1613 }
1614
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001615 mfs = h2_settings_max_frame_size;
1616 if (mfs > global.tune.bufsize)
1617 mfs = global.tune.bufsize;
1618
1619 if (!mfs)
1620 mfs = global.tune.bufsize;
1621
1622 if (mfs != 16384) {
Willy Tarreaube5b7152017-09-25 16:25:39 +02001623 char str[6] = "\x00\x05"; /* max_frame_size */
1624
1625 /* note: similarly we could also emit MAX_HEADER_LIST_SIZE to
1626 * match bufsize - rewrite size, but at the moment it seems
1627 * that clients don't take care of it.
1628 */
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001629 write_n32(str + 2, mfs);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001630 chunk_memcat(&buf, str, 6);
1631 }
1632
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001633 h2_set_frame_size(buf.area, buf.data - 9);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001634
1635 res = br_tail(h2c->mbuf);
1636 retry:
1637 if (!h2_get_buf(h2c, res)) {
1638 h2c->flags |= H2_CF_MUX_MALLOC;
1639 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001640 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001641 }
1642
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001643 ret = b_istput(res, ist2(buf.area, buf.data));
Willy Tarreaube5b7152017-09-25 16:25:39 +02001644 if (unlikely(ret <= 0)) {
1645 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001646 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1647 goto retry;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001648 h2c->flags |= H2_CF_MUX_MFULL;
1649 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001650 }
1651 else {
1652 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001653 ret = 0;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001654 }
1655 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001656 out:
1657 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001658 return ret;
1659}
1660
Willy Tarreau52eed752017-09-22 15:05:09 +02001661/* Try to receive a connection preface, then upon success try to send our
1662 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1663 * missing data. It may return an error in h2c.
1664 */
1665static int h2c_frt_recv_preface(struct h2c *h2c)
1666{
1667 int ret1;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001668 int ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001669
Willy Tarreau7838a792019-08-12 18:42:03 +02001670 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
1671
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001672 ret1 = b_isteq(&h2c->dbuf, 0, b_data(&h2c->dbuf), ist(H2_CONN_PREFACE));
Willy Tarreau52eed752017-09-22 15:05:09 +02001673
1674 if (unlikely(ret1 <= 0)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02001675 if (ret1 < 0)
1676 sess_log(h2c->conn->owner);
1677
Amaury Denoyellea8879232020-10-27 17:16:03 +01001678 if (ret1 < 0 || conn_xprt_read0_pending(h2c->conn)) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01001679 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 +02001680 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Amaury Denoyellea8879232020-10-27 17:16:03 +01001681 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
1682 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001683 ret2 = 0;
1684 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02001685 }
1686
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001687 ret2 = h2c_send_settings(h2c);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001688 if (ret2 > 0)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001689 b_del(&h2c->dbuf, ret1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001690 out:
1691 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001692 return ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001693}
1694
Willy Tarreau01b44822018-10-03 14:26:37 +02001695/* Try to send a connection preface, then upon success try to send our
1696 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1697 * missing data. It may return an error in h2c.
1698 */
1699static int h2c_bck_send_preface(struct h2c *h2c)
1700{
1701 struct buffer *res;
Willy Tarreau7838a792019-08-12 18:42:03 +02001702 int ret = 0;
1703
1704 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02001705
1706 if (h2c_mux_busy(h2c, NULL)) {
1707 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001708 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001709 }
1710
Willy Tarreaubcc45952019-05-26 10:05:50 +02001711 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001712 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001713 if (!h2_get_buf(h2c, res)) {
Willy Tarreau01b44822018-10-03 14:26:37 +02001714 h2c->flags |= H2_CF_MUX_MALLOC;
1715 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001716 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001717 }
1718
1719 if (!b_data(res)) {
1720 /* preface not yet sent */
Willy Tarreau9c218e72019-05-26 10:08:28 +02001721 ret = b_istput(res, ist(H2_CONN_PREFACE));
1722 if (unlikely(ret <= 0)) {
1723 if (!ret) {
1724 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1725 goto retry;
1726 h2c->flags |= H2_CF_MUX_MFULL;
1727 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001728 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001729 }
1730 else {
1731 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001732 ret = 0;
1733 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001734 }
1735 }
Willy Tarreau01b44822018-10-03 14:26:37 +02001736 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001737 ret = h2c_send_settings(h2c);
1738 out:
1739 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
1740 return ret;
Willy Tarreau01b44822018-10-03 14:26:37 +02001741}
1742
Willy Tarreau081d4722017-05-16 21:51:05 +02001743/* try to send a GOAWAY frame on the connection to report an error or a graceful
1744 * shutdown, with h2c->errcode as the error code. Returns > 0 on success or zero
1745 * if nothing was done. It uses h2c->last_sid as the advertised ID, or copies it
1746 * from h2c->max_id if it's not set yet (<0). In case of lack of room to write
1747 * the message, it subscribes the requester (either <h2s> or <h2c>) to future
1748 * notifications. It sets H2_CF_GOAWAY_SENT on success, and H2_CF_GOAWAY_FAILED
1749 * on unrecoverable failure. It will not attempt to send one again in this last
1750 * case so that it is safe to use h2c_error() to report such errors.
1751 */
1752static int h2c_send_goaway_error(struct h2c *h2c, struct h2s *h2s)
1753{
1754 struct buffer *res;
1755 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02001756 int ret = 0;
Willy Tarreau081d4722017-05-16 21:51:05 +02001757
Willy Tarreau7838a792019-08-12 18:42:03 +02001758 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
1759
1760 if (h2c->flags & H2_CF_GOAWAY_FAILED) {
1761 ret = 1; // claim that it worked
1762 goto out;
1763 }
Willy Tarreau081d4722017-05-16 21:51:05 +02001764
1765 if (h2c_mux_busy(h2c, h2s)) {
1766 if (h2s)
1767 h2s->flags |= H2_SF_BLK_MBUSY;
1768 else
1769 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001770 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001771 }
1772
Willy Tarreau9c218e72019-05-26 10:08:28 +02001773 /* len: 8, type: 7, flags: none, sid: 0 */
1774 memcpy(str, "\x00\x00\x08\x07\x00\x00\x00\x00\x00", 9);
1775
1776 if (h2c->last_sid < 0)
1777 h2c->last_sid = h2c->max_id;
1778
1779 write_n32(str + 9, h2c->last_sid);
1780 write_n32(str + 13, h2c->errcode);
1781
Willy Tarreaubcc45952019-05-26 10:05:50 +02001782 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001783 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001784 if (!h2_get_buf(h2c, res)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02001785 h2c->flags |= H2_CF_MUX_MALLOC;
1786 if (h2s)
1787 h2s->flags |= H2_SF_BLK_MROOM;
1788 else
1789 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001790 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001791 }
1792
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001793 ret = b_istput(res, ist2(str, 17));
Willy Tarreau081d4722017-05-16 21:51:05 +02001794 if (unlikely(ret <= 0)) {
1795 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001796 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1797 goto retry;
Willy Tarreau081d4722017-05-16 21:51:05 +02001798 h2c->flags |= H2_CF_MUX_MFULL;
1799 if (h2s)
1800 h2s->flags |= H2_SF_BLK_MROOM;
1801 else
1802 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001803 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001804 }
1805 else {
1806 /* we cannot report this error using GOAWAY, so we mark
1807 * it and claim a success.
1808 */
1809 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1810 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau7838a792019-08-12 18:42:03 +02001811 ret = 1;
1812 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001813 }
1814 }
1815 h2c->flags |= H2_CF_GOAWAY_SENT;
Willy Tarreauf965b2a2020-12-01 10:47:18 +01001816
1817 /* some codes are not for real errors, just attempts to close cleanly */
1818 switch (h2c->errcode) {
1819 case H2_ERR_NO_ERROR:
1820 case H2_ERR_ENHANCE_YOUR_CALM:
1821 case H2_ERR_REFUSED_STREAM:
1822 case H2_ERR_CANCEL:
1823 break;
1824 default:
1825 HA_ATOMIC_ADD(&h2c->px_counters->goaway_resp, 1);
1826 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001827 out:
1828 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
Willy Tarreau081d4722017-05-16 21:51:05 +02001829 return ret;
1830}
1831
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001832/* Try to send an RST_STREAM frame on the connection for the indicated stream
1833 * during mux operations. This stream must be valid and cannot be closed
1834 * already. h2s->id will be used for the stream ID and h2s->errcode will be
1835 * used for the error code. h2s->st will be update to H2_SS_CLOSED if it was
1836 * not yet.
1837 *
1838 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1839 * to write the message, it subscribes the stream to future notifications.
1840 */
1841static int h2s_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1842{
1843 struct buffer *res;
1844 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001845 int ret = 0;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001846
Willy Tarreau7838a792019-08-12 18:42:03 +02001847 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
1848
1849 if (!h2s || h2s->st == H2_SS_CLOSED) {
1850 ret = 1;
1851 goto out;
1852 }
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001853
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001854 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1855 * RST_STREAM in response to a RST_STREAM frame.
1856 */
Willy Tarreau231f6162019-08-06 10:01:40 +02001857 if (h2c->dsi == h2s->id && h2c->dft == H2_FT_RST_STREAM) {
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001858 ret = 1;
1859 goto ignore;
1860 }
1861
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001862 if (h2c_mux_busy(h2c, h2s)) {
1863 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001864 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001865 }
1866
Willy Tarreau9c218e72019-05-26 10:08:28 +02001867 /* len: 4, type: 3, flags: none */
1868 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1869 write_n32(str + 5, h2s->id);
1870 write_n32(str + 9, h2s->errcode);
1871
Willy Tarreaubcc45952019-05-26 10:05:50 +02001872 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001873 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001874 if (!h2_get_buf(h2c, res)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001875 h2c->flags |= H2_CF_MUX_MALLOC;
1876 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001877 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001878 }
1879
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001880 ret = b_istput(res, ist2(str, 13));
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001881 if (unlikely(ret <= 0)) {
1882 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001883 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1884 goto retry;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001885 h2c->flags |= H2_CF_MUX_MFULL;
1886 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001887 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001888 }
1889 else {
1890 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001891 ret = 0;
1892 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001893 }
1894 }
1895
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001896 ignore:
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001897 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001898 h2s_close(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001899 out:
1900 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001901 return ret;
1902}
1903
1904/* Try to send an RST_STREAM frame on the connection for the stream being
1905 * demuxed using h2c->dsi for the stream ID. It will use h2s->errcode as the
Willy Tarreaue6888ff2018-12-23 18:26:26 +01001906 * error code, even if the stream is one of the dummy ones, and will update
1907 * h2s->st to H2_SS_CLOSED if it was not yet.
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001908 *
1909 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1910 * to write the message, it blocks the demuxer and subscribes it to future
Joseph Herlantd77575d2018-11-25 10:54:45 -08001911 * notifications. It's worth mentioning that an RST may even be sent for a
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001912 * closed stream.
Willy Tarreau27a84c92017-10-17 08:10:17 +02001913 */
1914static int h2c_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1915{
1916 struct buffer *res;
1917 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001918 int ret = 0;
1919
1920 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02001921
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001922 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1923 * RST_STREAM in response to a RST_STREAM frame.
1924 */
1925 if (h2c->dft == H2_FT_RST_STREAM) {
1926 ret = 1;
1927 goto ignore;
1928 }
1929
Willy Tarreau27a84c92017-10-17 08:10:17 +02001930 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001931 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001932 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001933 }
1934
Willy Tarreau9c218e72019-05-26 10:08:28 +02001935 /* len: 4, type: 3, flags: none */
1936 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1937
1938 write_n32(str + 5, h2c->dsi);
1939 write_n32(str + 9, h2s->errcode);
1940
Willy Tarreaubcc45952019-05-26 10:05:50 +02001941 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001942 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001943 if (!h2_get_buf(h2c, res)) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02001944 h2c->flags |= H2_CF_MUX_MALLOC;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001945 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001946 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001947 }
1948
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001949 ret = b_istput(res, ist2(str, 13));
Willy Tarreau27a84c92017-10-17 08:10:17 +02001950 if (unlikely(ret <= 0)) {
1951 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001952 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1953 goto retry;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001954 h2c->flags |= H2_CF_MUX_MFULL;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001955 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001956 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001957 }
1958 else {
1959 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001960 ret = 0;
1961 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001962 }
1963 }
1964
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001965 ignore:
Willy Tarreauab0e1da2018-10-05 10:16:37 +02001966 if (h2s->id) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02001967 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001968 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001969 }
1970
Willy Tarreau7838a792019-08-12 18:42:03 +02001971 out:
Amaury Denoyellea8879232020-10-27 17:16:03 +01001972 HA_ATOMIC_ADD(&h2c->px_counters->rst_stream_resp, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001973 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02001974 return ret;
1975}
1976
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001977/* try to send an empty DATA frame with the ES flag set to notify about the
1978 * end of stream and match a shutdown(write). If an ES was already sent as
1979 * indicated by HLOC/ERROR/RESET/CLOSED states, nothing is done. Returns > 0
1980 * on success or zero if nothing was done. In case of lack of room to write the
1981 * message, it subscribes the requesting stream to future notifications.
1982 */
1983static int h2_send_empty_data_es(struct h2s *h2s)
1984{
1985 struct h2c *h2c = h2s->h2c;
1986 struct buffer *res;
1987 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02001988 int ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001989
Willy Tarreau7838a792019-08-12 18:42:03 +02001990 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
1991
1992 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED) {
1993 ret = 1;
1994 goto out;
1995 }
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001996
1997 if (h2c_mux_busy(h2c, h2s)) {
1998 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001999 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002000 }
2001
Willy Tarreau9c218e72019-05-26 10:08:28 +02002002 /* len: 0x000000, type: 0(DATA), flags: ES=1 */
2003 memcpy(str, "\x00\x00\x00\x00\x01", 5);
2004 write_n32(str + 5, h2s->id);
2005
Willy Tarreaubcc45952019-05-26 10:05:50 +02002006 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002007 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002008 if (!h2_get_buf(h2c, res)) {
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002009 h2c->flags |= H2_CF_MUX_MALLOC;
2010 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002011 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002012 }
2013
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002014 ret = b_istput(res, ist2(str, 9));
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002015 if (likely(ret > 0)) {
2016 h2s->flags |= H2_SF_ES_SENT;
2017 }
2018 else if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002019 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2020 goto retry;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002021 h2c->flags |= H2_CF_MUX_MFULL;
2022 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002023 }
2024 else {
2025 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002026 ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002027 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002028 out:
2029 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002030 return ret;
2031}
2032
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05002033/* wake a specific stream and assign its conn_stream some CS_FL_* flags among
Willy Tarreau99ad1b32019-05-14 11:46:28 +02002034 * CS_FL_ERR_PENDING and CS_FL_ERROR if needed. The stream's state
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002035 * is automatically updated accordingly. If the stream is orphaned, it is
2036 * destroyed.
Christopher Fauletf02ca002019-03-07 16:21:34 +01002037 */
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002038static void h2s_wake_one_stream(struct h2s *h2s)
Christopher Fauletf02ca002019-03-07 16:21:34 +01002039{
Willy Tarreau7838a792019-08-12 18:42:03 +02002040 struct h2c *h2c = h2s->h2c;
2041
2042 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn, h2s);
2043
Christopher Fauletf02ca002019-03-07 16:21:34 +01002044 if (!h2s->cs) {
2045 /* this stream was already orphaned */
2046 h2s_destroy(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002047 TRACE_DEVEL("leaving with no h2s", H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002048 return;
2049 }
2050
Christopher Fauletaade4ed2020-10-08 15:38:41 +02002051 if (h2c_read0_pending(h2s->h2c)) {
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002052 if (h2s->st == H2_SS_OPEN)
2053 h2s->st = H2_SS_HREM;
2054 else if (h2s->st == H2_SS_HLOC)
2055 h2s_close(h2s);
2056 }
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002057
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002058 if ((h2s->h2c->st0 >= H2_CS_ERROR || h2s->h2c->conn->flags & CO_FL_ERROR) ||
2059 (h2s->h2c->last_sid > 0 && (!h2s->id || h2s->id > h2s->h2c->last_sid))) {
2060 h2s->cs->flags |= CS_FL_ERR_PENDING;
2061 if (h2s->cs->flags & CS_FL_EOS)
2062 h2s->cs->flags |= CS_FL_ERROR;
Willy Tarreau23482912019-05-07 15:23:14 +02002063
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002064 if (h2s->st < H2_SS_ERROR)
2065 h2s->st = H2_SS_ERROR;
2066 }
Christopher Fauletf02ca002019-03-07 16:21:34 +01002067
2068 h2s_alert(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002069 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002070}
2071
2072/* wake the streams attached to the connection, whose id is greater than <last>
2073 * or unassigned.
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002074 */
Willy Tarreau23482912019-05-07 15:23:14 +02002075static void h2_wake_some_streams(struct h2c *h2c, int last)
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002076{
2077 struct eb32_node *node;
2078 struct h2s *h2s;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002079
Willy Tarreau7838a792019-08-12 18:42:03 +02002080 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn);
2081
Christopher Fauletf02ca002019-03-07 16:21:34 +01002082 /* Wake all streams with ID > last */
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002083 node = eb32_lookup_ge(&h2c->streams_by_id, last + 1);
2084 while (node) {
2085 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002086 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002087 h2s_wake_one_stream(h2s);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002088 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01002089
Christopher Fauletf02ca002019-03-07 16:21:34 +01002090 /* Wake all streams with unassigned ID (ID == 0) */
2091 node = eb32_lookup(&h2c->streams_by_id, 0);
2092 while (node) {
2093 h2s = container_of(node, struct h2s, by_id);
2094 if (h2s->id > 0)
2095 break;
2096 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002097 h2s_wake_one_stream(h2s);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002098 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002099
2100 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002101}
2102
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002103/* Wake up all blocked streams whose window size has become positive after the
2104 * mux's initial window was adjusted. This should be done after having processed
2105 * SETTINGS frames which have updated the mux's initial window size.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002106 */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002107static void h2c_unblock_sfctl(struct h2c *h2c)
Willy Tarreau3421aba2017-07-27 15:41:03 +02002108{
2109 struct h2s *h2s;
2110 struct eb32_node *node;
2111
Willy Tarreau7838a792019-08-12 18:42:03 +02002112 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
2113
Willy Tarreau3421aba2017-07-27 15:41:03 +02002114 node = eb32_first(&h2c->streams_by_id);
2115 while (node) {
2116 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002117 if (h2s->flags & H2_SF_BLK_SFCTL && h2s_mws(h2s) > 0) {
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002118 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002119 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002120 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2121 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002122 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002123 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002124 node = eb32_next(node);
2125 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002126
2127 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002128}
2129
2130/* processes a SETTINGS frame whose payload is <payload> for <plen> bytes, and
2131 * ACKs it if needed. Returns > 0 on success or zero on missing data. It may
Willy Tarreaub860c732019-01-30 15:39:55 +01002132 * return an error in h2c. The caller must have already verified frame length
2133 * and stream ID validity. Described in RFC7540#6.5.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002134 */
2135static int h2c_handle_settings(struct h2c *h2c)
2136{
2137 unsigned int offset;
2138 int error;
2139
Willy Tarreau7838a792019-08-12 18:42:03 +02002140 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
2141
Willy Tarreau3421aba2017-07-27 15:41:03 +02002142 if (h2c->dff & H2_F_SETTINGS_ACK) {
2143 if (h2c->dfl) {
2144 error = H2_ERR_FRAME_SIZE_ERROR;
2145 goto fail;
2146 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002147 goto done;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002148 }
2149
Willy Tarreau3421aba2017-07-27 15:41:03 +02002150 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002151 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau7838a792019-08-12 18:42:03 +02002152 goto out0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002153
2154 /* parse the frame */
2155 for (offset = 0; offset < h2c->dfl; offset += 6) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002156 uint16_t type = h2_get_n16(&h2c->dbuf, offset);
2157 int32_t arg = h2_get_n32(&h2c->dbuf, offset + 2);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002158
2159 switch (type) {
2160 case H2_SETTINGS_INITIAL_WINDOW_SIZE:
2161 /* we need to update all existing streams with the
2162 * difference from the previous iws.
2163 */
2164 if (arg < 0) { // RFC7540#6.5.2
2165 error = H2_ERR_FLOW_CONTROL_ERROR;
2166 goto fail;
2167 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002168 h2c->miw = arg;
2169 break;
2170 case H2_SETTINGS_MAX_FRAME_SIZE:
2171 if (arg < 16384 || arg > 16777215) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002172 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 +02002173 error = H2_ERR_PROTOCOL_ERROR;
Amaury Denoyellea8879232020-10-27 17:16:03 +01002174 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002175 goto fail;
2176 }
2177 h2c->mfs = arg;
2178 break;
Willy Tarreau1b38b462017-12-03 19:02:28 +01002179 case H2_SETTINGS_ENABLE_PUSH:
2180 if (arg < 0 || arg > 1) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002181 TRACE_ERROR("ENABLE_PUSH out of range", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002182 error = H2_ERR_PROTOCOL_ERROR;
Amaury Denoyellea8879232020-10-27 17:16:03 +01002183 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002184 goto fail;
2185 }
2186 break;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01002187 case H2_SETTINGS_MAX_CONCURRENT_STREAMS:
2188 if (h2c->flags & H2_CF_IS_BACK) {
2189 /* the limit is only for the backend; for the frontend it is our limit */
2190 if ((unsigned int)arg > h2_settings_max_concurrent_streams)
2191 arg = h2_settings_max_concurrent_streams;
2192 h2c->streams_limit = arg;
2193 }
2194 break;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002195 }
2196 }
2197
2198 /* need to ACK this frame now */
2199 h2c->st0 = H2_CS_FRAME_A;
Willy Tarreau7838a792019-08-12 18:42:03 +02002200 done:
2201 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002202 return 1;
2203 fail:
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002204 if (!(h2c->flags & H2_CF_IS_BACK))
2205 sess_log(h2c->conn->owner);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002206 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002207 out0:
2208 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 +02002209 return 0;
2210}
2211
2212/* try to send an ACK for a settings frame on the connection. Returns > 0 on
2213 * success or one of the h2_status values.
2214 */
2215static int h2c_ack_settings(struct h2c *h2c)
2216{
2217 struct buffer *res;
2218 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002219 int ret = 0;
2220
2221 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002222
2223 if (h2c_mux_busy(h2c, NULL)) {
2224 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002225 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002226 }
2227
Willy Tarreau9c218e72019-05-26 10:08:28 +02002228 memcpy(str,
2229 "\x00\x00\x00" /* length : 0 (no data) */
2230 "\x04" "\x01" /* type : 4, flags : ACK */
2231 "\x00\x00\x00\x00" /* stream ID */, 9);
2232
Willy Tarreaubcc45952019-05-26 10:05:50 +02002233 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002234 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002235 if (!h2_get_buf(h2c, res)) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02002236 h2c->flags |= H2_CF_MUX_MALLOC;
2237 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002238 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002239 }
2240
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002241 ret = b_istput(res, ist2(str, 9));
Willy Tarreau3421aba2017-07-27 15:41:03 +02002242 if (unlikely(ret <= 0)) {
2243 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002244 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2245 goto retry;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002246 h2c->flags |= H2_CF_MUX_MFULL;
2247 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002248 }
2249 else {
2250 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002251 ret = 0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002252 }
2253 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002254 out:
2255 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002256 return ret;
2257}
2258
Willy Tarreaucf68c782017-10-10 17:11:41 +02002259/* processes a PING frame and schedules an ACK if needed. The caller must pass
2260 * the pointer to the payload in <payload>. Returns > 0 on success or zero on
Willy Tarreaub860c732019-01-30 15:39:55 +01002261 * missing data. The caller must have already verified frame length
2262 * and stream ID validity.
Willy Tarreaucf68c782017-10-10 17:11:41 +02002263 */
2264static int h2c_handle_ping(struct h2c *h2c)
2265{
Willy Tarreaucf68c782017-10-10 17:11:41 +02002266 /* schedule a response */
Willy Tarreau68ed6412017-12-03 18:15:56 +01002267 if (!(h2c->dff & H2_F_PING_ACK))
Willy Tarreaucf68c782017-10-10 17:11:41 +02002268 h2c->st0 = H2_CS_FRAME_A;
2269 return 1;
2270}
2271
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002272/* Try to send a window update for stream id <sid> and value <increment>.
2273 * Returns > 0 on success or zero on missing room or failure. It may return an
2274 * error in h2c.
2275 */
2276static int h2c_send_window_update(struct h2c *h2c, int sid, uint32_t increment)
2277{
2278 struct buffer *res;
2279 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002280 int ret = 0;
2281
2282 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002283
2284 if (h2c_mux_busy(h2c, NULL)) {
2285 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002286 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002287 }
2288
Willy Tarreau9c218e72019-05-26 10:08:28 +02002289 /* length: 4, type: 8, flags: none */
2290 memcpy(str, "\x00\x00\x04\x08\x00", 5);
2291 write_n32(str + 5, sid);
2292 write_n32(str + 9, increment);
2293
Willy Tarreaubcc45952019-05-26 10:05:50 +02002294 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002295 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002296 if (!h2_get_buf(h2c, res)) {
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002297 h2c->flags |= H2_CF_MUX_MALLOC;
2298 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002299 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002300 }
2301
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002302 ret = b_istput(res, ist2(str, 13));
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002303 if (unlikely(ret <= 0)) {
2304 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002305 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2306 goto retry;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002307 h2c->flags |= H2_CF_MUX_MFULL;
2308 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002309 }
2310 else {
2311 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002312 ret = 0;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002313 }
2314 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002315 out:
2316 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002317 return ret;
2318}
2319
2320/* try to send pending window update for the connection. It's safe to call it
2321 * with no pending updates. Returns > 0 on success or zero on missing room or
2322 * failure. It may return an error in h2c.
2323 */
2324static int h2c_send_conn_wu(struct h2c *h2c)
2325{
2326 int ret = 1;
2327
Willy Tarreau7838a792019-08-12 18:42:03 +02002328 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2329
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002330 if (h2c->rcvd_c <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002331 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002332
Willy Tarreau97aaa672018-12-23 09:49:04 +01002333 if (!(h2c->flags & H2_CF_WINDOW_OPENED)) {
2334 /* increase the advertised connection window to 2G on
2335 * first update.
2336 */
2337 h2c->flags |= H2_CF_WINDOW_OPENED;
2338 h2c->rcvd_c += H2_INITIAL_WINDOW_INCREMENT;
2339 }
2340
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002341 /* send WU for the connection */
2342 ret = h2c_send_window_update(h2c, 0, h2c->rcvd_c);
2343 if (ret > 0)
2344 h2c->rcvd_c = 0;
2345
Willy Tarreau7838a792019-08-12 18:42:03 +02002346 out:
2347 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002348 return ret;
2349}
2350
2351/* try to send pending window update for the current dmux stream. It's safe to
2352 * call it with no pending updates. Returns > 0 on success or zero on missing
2353 * room or failure. It may return an error in h2c.
2354 */
2355static int h2c_send_strm_wu(struct h2c *h2c)
2356{
2357 int ret = 1;
2358
Willy Tarreau7838a792019-08-12 18:42:03 +02002359 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2360
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002361 if (h2c->rcvd_s <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002362 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002363
2364 /* send WU for the stream */
2365 ret = h2c_send_window_update(h2c, h2c->dsi, h2c->rcvd_s);
2366 if (ret > 0)
2367 h2c->rcvd_s = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002368 out:
2369 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002370 return ret;
2371}
2372
Willy Tarreaucf68c782017-10-10 17:11:41 +02002373/* try to send an ACK for a ping frame on the connection. Returns > 0 on
2374 * success, 0 on missing data or one of the h2_status values.
2375 */
2376static int h2c_ack_ping(struct h2c *h2c)
2377{
2378 struct buffer *res;
2379 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02002380 int ret = 0;
2381
2382 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002383
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002384 if (b_data(&h2c->dbuf) < 8)
Willy Tarreau7838a792019-08-12 18:42:03 +02002385 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002386
2387 if (h2c_mux_busy(h2c, NULL)) {
2388 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002389 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002390 }
2391
Willy Tarreaucf68c782017-10-10 17:11:41 +02002392 memcpy(str,
2393 "\x00\x00\x08" /* length : 8 (same payload) */
2394 "\x06" "\x01" /* type : 6, flags : ACK */
2395 "\x00\x00\x00\x00" /* stream ID */, 9);
2396
2397 /* copy the original payload */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002398 h2_get_buf_bytes(str + 9, 8, &h2c->dbuf, 0);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002399
Willy Tarreau9c218e72019-05-26 10:08:28 +02002400 res = br_tail(h2c->mbuf);
2401 retry:
2402 if (!h2_get_buf(h2c, res)) {
2403 h2c->flags |= H2_CF_MUX_MALLOC;
2404 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002405 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02002406 }
2407
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002408 ret = b_istput(res, ist2(str, 17));
Willy Tarreaucf68c782017-10-10 17:11:41 +02002409 if (unlikely(ret <= 0)) {
2410 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002411 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2412 goto retry;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002413 h2c->flags |= H2_CF_MUX_MFULL;
2414 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002415 }
2416 else {
2417 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002418 ret = 0;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002419 }
2420 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002421 out:
2422 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002423 return ret;
2424}
2425
Willy Tarreau26f95952017-07-27 17:18:30 +02002426/* processes a WINDOW_UPDATE frame whose payload is <payload> for <plen> bytes.
2427 * Returns > 0 on success or zero on missing data. It may return an error in
Willy Tarreaub860c732019-01-30 15:39:55 +01002428 * h2c or h2s. The caller must have already verified frame length and stream ID
2429 * validity. Described in RFC7540#6.9.
Willy Tarreau26f95952017-07-27 17:18:30 +02002430 */
2431static int h2c_handle_window_update(struct h2c *h2c, struct h2s *h2s)
2432{
2433 int32_t inc;
2434 int error;
2435
Willy Tarreau7838a792019-08-12 18:42:03 +02002436 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
2437
Willy Tarreau26f95952017-07-27 17:18:30 +02002438 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002439 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau7838a792019-08-12 18:42:03 +02002440 goto out0;
Willy Tarreau26f95952017-07-27 17:18:30 +02002441
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002442 inc = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau26f95952017-07-27 17:18:30 +02002443
2444 if (h2c->dsi != 0) {
2445 /* stream window update */
Willy Tarreau26f95952017-07-27 17:18:30 +02002446
2447 /* it's not an error to receive WU on a closed stream */
2448 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau7838a792019-08-12 18:42:03 +02002449 goto done;
Willy Tarreau26f95952017-07-27 17:18:30 +02002450
2451 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002452 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 +02002453 error = H2_ERR_PROTOCOL_ERROR;
Amaury Denoyellea8879232020-10-27 17:16:03 +01002454 HA_ATOMIC_ADD(&h2c->px_counters->strm_proto_err, 1);
Willy Tarreau26f95952017-07-27 17:18:30 +02002455 goto strm_err;
2456 }
2457
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002458 if (h2s_mws(h2s) >= 0 && h2s_mws(h2s) + inc < 0) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002459 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 +02002460 error = H2_ERR_FLOW_CONTROL_ERROR;
Willy Tarreaua3075282020-12-01 10:22:43 +01002461 HA_ATOMIC_ADD(&h2c->px_counters->strm_proto_err, 1);
Willy Tarreau26f95952017-07-27 17:18:30 +02002462 goto strm_err;
2463 }
2464
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002465 h2s->sws += inc;
2466 if (h2s_mws(h2s) > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002467 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002468 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002469 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2470 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Olivier Houcharddddfe312018-10-10 18:51:00 +02002471 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreau26f95952017-07-27 17:18:30 +02002472 }
2473 }
2474 else {
2475 /* connection window update */
2476 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002477 TRACE_ERROR("conn WINDOW_UPDATE inc=0", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002478 error = H2_ERR_PROTOCOL_ERROR;
Amaury Denoyellea8879232020-10-27 17:16:03 +01002479 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreau26f95952017-07-27 17:18:30 +02002480 goto conn_err;
2481 }
2482
2483 if (h2c->mws >= 0 && h2c->mws + inc < 0) {
2484 error = H2_ERR_FLOW_CONTROL_ERROR;
2485 goto conn_err;
2486 }
2487
2488 h2c->mws += inc;
2489 }
2490
Willy Tarreau7838a792019-08-12 18:42:03 +02002491 done:
2492 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002493 return 1;
2494
2495 conn_err:
2496 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002497 out0:
2498 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 +02002499 return 0;
2500
2501 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002502 h2s_error(h2s, error);
2503 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002504 TRACE_DEVEL("leaving on stream error", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002505 return 0;
2506}
2507
Willy Tarreaue96b0922017-10-30 00:28:29 +01002508/* processes a GOAWAY frame, and signals all streams whose ID is greater than
Willy Tarreaub860c732019-01-30 15:39:55 +01002509 * the last ID. Returns > 0 on success or zero on missing data. The caller must
2510 * have already verified frame length and stream ID validity. Described in
2511 * RFC7540#6.8.
Willy Tarreaue96b0922017-10-30 00:28:29 +01002512 */
2513static int h2c_handle_goaway(struct h2c *h2c)
2514{
Willy Tarreaue96b0922017-10-30 00:28:29 +01002515 int last;
2516
Willy Tarreau7838a792019-08-12 18:42:03 +02002517 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002518 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002519 if (b_data(&h2c->dbuf) < h2c->dfl) {
2520 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002521 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002522 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01002523
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002524 last = h2_get_n32(&h2c->dbuf, 0);
2525 h2c->errcode = h2_get_n32(&h2c->dbuf, 4);
Willy Tarreau11cc2d62017-12-03 10:27:47 +01002526 if (h2c->last_sid < 0)
2527 h2c->last_sid = last;
Willy Tarreau23482912019-05-07 15:23:14 +02002528 h2_wake_some_streams(h2c, last);
Willy Tarreau7838a792019-08-12 18:42:03 +02002529 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002530 return 1;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002531}
2532
Willy Tarreau92153fc2017-12-03 19:46:19 +01002533/* processes a PRIORITY frame, and either skips it or rejects if it is
Willy Tarreaub860c732019-01-30 15:39:55 +01002534 * invalid. Returns > 0 on success or zero on missing data. It may return an
2535 * error in h2c. The caller must have already verified frame length and stream
2536 * ID validity. Described in RFC7540#6.3.
Willy Tarreau92153fc2017-12-03 19:46:19 +01002537 */
2538static int h2c_handle_priority(struct h2c *h2c)
2539{
Willy Tarreau7838a792019-08-12 18:42:03 +02002540 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
2541
Willy Tarreau92153fc2017-12-03 19:46:19 +01002542 /* process full frame only */
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002543 if (b_data(&h2c->dbuf) < h2c->dfl) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002544 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002545 return 0;
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002546 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01002547
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002548 if (h2_get_n32(&h2c->dbuf, 0) == h2c->dsi) {
Willy Tarreau92153fc2017-12-03 19:46:19 +01002549 /* 7540#5.3 : can't depend on itself */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002550 TRACE_ERROR("PRIORITY depends on itself", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002551 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreaua3075282020-12-01 10:22:43 +01002552 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +02002553 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002554 return 0;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002555 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002556 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002557 return 1;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002558}
2559
Willy Tarreaucd234e92017-08-18 10:59:39 +02002560/* processes an RST_STREAM frame, and sets the 32-bit error code on the stream.
Willy Tarreaub860c732019-01-30 15:39:55 +01002561 * Returns > 0 on success or zero on missing data. The caller must have already
2562 * verified frame length and stream ID validity. Described in RFC7540#6.4.
Willy Tarreaucd234e92017-08-18 10:59:39 +02002563 */
2564static int h2c_handle_rst_stream(struct h2c *h2c, struct h2s *h2s)
2565{
Willy Tarreau7838a792019-08-12 18:42:03 +02002566 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
2567
Willy Tarreaucd234e92017-08-18 10:59:39 +02002568 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002569 if (b_data(&h2c->dbuf) < h2c->dfl) {
2570 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002571 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002572 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002573
2574 /* late RST, already handled */
Willy Tarreau7838a792019-08-12 18:42:03 +02002575 if (h2s->st == H2_SS_CLOSED) {
2576 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 +02002577 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002578 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002579
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002580 h2s->errcode = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau00dd0782018-03-01 16:31:34 +01002581 h2s_close(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002582
2583 if (h2s->cs) {
Willy Tarreauec988c72018-12-19 18:00:29 +01002584 cs_set_error(h2s->cs);
Willy Tarreauf830f012018-12-19 17:44:55 +01002585 h2s_alert(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002586 }
2587
2588 h2s->flags |= H2_SF_RST_RCVD;
Willy Tarreau7838a792019-08-12 18:42:03 +02002589 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002590 return 1;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002591}
2592
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002593/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2594 * It may return an error in h2c or h2s. The caller must consider that the
2595 * return value is the new h2s in case one was allocated (most common case).
2596 * Described in RFC7540#6.2. Most of the
Willy Tarreau13278b42017-10-13 19:23:14 +02002597 * errors here are reported as connection errors since it's impossible to
2598 * recover from such errors after the compression context has been altered.
2599 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002600static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau13278b42017-10-13 19:23:14 +02002601{
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002602 struct buffer rxbuf = BUF_NULL;
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002603 unsigned long long body_len = 0;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002604 uint32_t flags = 0;
Willy Tarreau13278b42017-10-13 19:23:14 +02002605 int error;
2606
Willy Tarreau7838a792019-08-12 18:42:03 +02002607 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2608
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002609 if (!b_size(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002610 goto out; // empty buffer
Willy Tarreau13278b42017-10-13 19:23:14 +02002611
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002612 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002613 goto out; // incomplete frame
Willy Tarreau13278b42017-10-13 19:23:14 +02002614
2615 /* now either the frame is complete or the buffer is complete */
2616 if (h2s->st != H2_SS_IDLE) {
Willy Tarreau88d138e2019-01-02 19:38:14 +01002617 /* The stream exists/existed, this must be a trailers frame */
2618 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreauaab1a602019-05-06 11:12:18 +02002619 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &body_len);
2620 /* unrecoverable error ? */
2621 if (h2c->st0 >= H2_CS_ERROR)
2622 goto out;
2623
2624 if (error == 0)
2625 goto out; // missing data
2626
2627 if (error < 0) {
2628 /* Failed to decode this frame (e.g. too large request)
2629 * but the HPACK decompressor is still synchronized.
2630 */
2631 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
2632 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau88d138e2019-01-02 19:38:14 +01002633 goto out;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002634 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01002635 goto done;
2636 }
Willy Tarreau1f035502019-01-30 11:44:07 +01002637 /* the connection was already killed by an RST, let's consume
2638 * the data and send another RST.
2639 */
2640 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
2641 h2s = (struct h2s*)h2_error_stream;
2642 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002643 }
2644 else if (h2c->dsi <= h2c->max_id || !(h2c->dsi & 1)) {
2645 /* RFC7540#5.1.1 stream id > prev ones, and must be odd here */
2646 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002647 TRACE_ERROR("HEADERS on invalid stream ID", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Amaury Denoyellea8879232020-10-27 17:16:03 +01002648 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreau22de8d32018-09-05 19:55:58 +02002649 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02002650 goto conn_err;
2651 }
Willy Tarreau415b1ee2019-01-02 13:59:43 +01002652 else if (h2c->flags & H2_CF_DEM_TOOMANY)
2653 goto out; // IDLE but too many cs still present
Willy Tarreau13278b42017-10-13 19:23:14 +02002654
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002655 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002656
Willy Tarreau25919232019-01-03 14:48:18 +01002657 /* unrecoverable error ? */
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002658 if (h2c->st0 >= H2_CS_ERROR)
2659 goto out;
2660
Willy Tarreau25919232019-01-03 14:48:18 +01002661 if (error <= 0) {
2662 if (error == 0)
2663 goto out; // missing data
2664
2665 /* Failed to decode this stream (e.g. too large request)
2666 * but the HPACK decompressor is still synchronized.
2667 */
2668 h2s = (struct h2s*)h2_error_stream;
2669 goto send_rst;
2670 }
2671
Willy Tarreau22de8d32018-09-05 19:55:58 +02002672 /* Note: we don't emit any other logs below because ff we return
Willy Tarreaua8e49542018-10-03 18:53:55 +02002673 * positively from h2c_frt_stream_new(), the stream will report the error,
2674 * and if we return in error, h2c_frt_stream_new() will emit the error.
Christopher Faulet7d013e72020-12-15 16:56:50 +01002675 *
2676 * Xfer the rxbuf to the stream. On success, the new stream owns the
2677 * rxbuf. On error, it is released here.
Willy Tarreau22de8d32018-09-05 19:55:58 +02002678 */
Christopher Faulet7d013e72020-12-15 16:56:50 +01002679 h2s = h2c_frt_stream_new(h2c, h2c->dsi, &rxbuf);
Willy Tarreau13278b42017-10-13 19:23:14 +02002680 if (!h2s) {
Willy Tarreau96a10c22018-12-23 18:30:44 +01002681 h2s = (struct h2s*)h2_refused_stream;
2682 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002683 }
2684
2685 h2s->st = H2_SS_OPEN;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002686 h2s->flags |= flags;
Willy Tarreau1915ca22019-01-24 11:49:37 +01002687 h2s->body_len = body_len;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002688
Willy Tarreau88d138e2019-01-02 19:38:14 +01002689 done:
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002690 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau13278b42017-10-13 19:23:14 +02002691 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002692
2693 if (h2s->flags & H2_SF_ES_RCVD) {
Willy Tarreaufc10f592019-01-30 19:28:32 +01002694 if (h2s->st == H2_SS_OPEN)
2695 h2s->st = H2_SS_HREM;
2696 else
2697 h2s_close(h2s);
Willy Tarreau13278b42017-10-13 19:23:14 +02002698 }
2699
Willy Tarreau3a429f02019-01-03 11:41:50 +01002700 /* update the max stream ID if the request is being processed */
2701 if (h2s->id > h2c->max_id)
2702 h2c->max_id = h2s->id;
Willy Tarreau13278b42017-10-13 19:23:14 +02002703
Willy Tarreau022e5e52020-09-10 09:33:15 +02002704 TRACE_USER("rcvd H2 request ", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW, h2c->conn, 0, &rxbuf);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002705 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002706
2707 conn_err:
2708 h2c_error(h2c, error);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002709 goto out;
Willy Tarreau13278b42017-10-13 19:23:14 +02002710
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002711 out:
2712 h2_release_buf(h2c, &rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002713 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 +01002714 return NULL;
Willy Tarreau96a10c22018-12-23 18:30:44 +01002715
2716 send_rst:
2717 /* make the demux send an RST for the current stream. We may only
2718 * do this if we're certain that the HEADERS frame was properly
2719 * decompressed so that the HPACK decoder is still kept up to date.
2720 */
2721 h2_release_buf(h2c, &rxbuf);
2722 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002723
Willy Tarreau022e5e52020-09-10 09:33:15 +02002724 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 +02002725 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau96a10c22018-12-23 18:30:44 +01002726 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002727}
2728
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002729/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2730 * It may return an error in h2c or h2s. Described in RFC7540#6.2. Most of the
2731 * errors here are reported as connection errors since it's impossible to
2732 * recover from such errors after the compression context has been altered.
2733 */
2734static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
2735{
Christopher Faulet6884aa32019-09-23 15:28:20 +02002736 struct buffer rxbuf = BUF_NULL;
2737 unsigned long long body_len = 0;
2738 uint32_t flags = 0;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002739 int error;
2740
Willy Tarreau7838a792019-08-12 18:42:03 +02002741 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2742
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002743 if (!b_size(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002744 goto fail; // empty buffer
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002745
2746 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002747 goto fail; // incomplete frame
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002748
Christopher Faulet6884aa32019-09-23 15:28:20 +02002749 if (h2s->st != H2_SS_CLOSED) {
2750 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &h2s->body_len);
2751 }
2752 else {
2753 /* the connection was already killed by an RST, let's consume
2754 * the data and send another RST.
2755 */
2756 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
Christopher Fauletea7a7782019-09-26 16:19:13 +02002757 h2s = (struct h2s*)h2_error_stream;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002758 h2c->st0 = H2_CS_FRAME_E;
2759 goto send_rst;
2760 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002761
Willy Tarreau25919232019-01-03 14:48:18 +01002762 /* unrecoverable error ? */
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002763 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002764 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002765
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002766 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2767 /* RFC7540#5.1 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002768 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 +01002769 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2770 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreaua3075282020-12-01 10:22:43 +01002771 HA_ATOMIC_ADD(&h2c->px_counters->strm_proto_err, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +02002772 goto fail;
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002773 }
2774
Willy Tarreau25919232019-01-03 14:48:18 +01002775 if (error <= 0) {
2776 if (error == 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002777 goto fail; // missing data
Willy Tarreau25919232019-01-03 14:48:18 +01002778
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002779 /* stream error : send RST_STREAM */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002780 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 +01002781 h2s_error(h2s, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002782 h2c->st0 = H2_CS_FRAME_E;
Amaury Denoyellea8879232020-10-27 17:16:03 +01002783 HA_ATOMIC_ADD(&h2c->px_counters->strm_proto_err, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +02002784 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002785 }
2786
Christopher Fauletfa922f02019-05-07 10:55:17 +02002787 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002788 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002789
Willy Tarreau927b88b2019-03-04 08:03:25 +01002790 if (h2s->cs && h2s->cs->flags & CS_FL_ERROR && h2s->st < H2_SS_ERROR)
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002791 h2s->st = H2_SS_ERROR;
Christopher Fauletfa922f02019-05-07 10:55:17 +02002792 else if (h2s->flags & H2_SF_ES_RCVD) {
2793 if (h2s->st == H2_SS_OPEN)
2794 h2s->st = H2_SS_HREM;
2795 else if (h2s->st == H2_SS_HLOC)
2796 h2s_close(h2s);
2797 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002798
Christopher Fauletf95f8762021-01-22 11:59:07 +01002799 /* Unblock busy server h2s waiting for the response headers to validate
2800 * the tunnel establishment or the end of the response of an oborted
2801 * tunnel
2802 */
2803 if ((h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY)) == (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY) ||
2804 (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)) {
2805 TRACE_STATE("Unblock h2s blocked on tunnel establishment/abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2806 h2s->flags &= ~H2_SF_BLK_MBUSY;
2807 }
2808
Willy Tarreau022e5e52020-09-10 09:33:15 +02002809 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 +02002810 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002811 return h2s;
Willy Tarreau7838a792019-08-12 18:42:03 +02002812 fail:
2813 TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2814 return NULL;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002815
2816 send_rst:
2817 /* make the demux send an RST for the current stream. We may only
2818 * do this if we're certain that the HEADERS frame was properly
2819 * decompressed so that the HPACK decoder is still kept up to date.
2820 */
2821 h2_release_buf(h2c, &rxbuf);
2822 h2c->st0 = H2_CS_FRAME_E;
2823
Willy Tarreau022e5e52020-09-10 09:33:15 +02002824 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 +02002825 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2826 return h2s;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002827}
2828
Willy Tarreau454f9052017-10-26 19:40:35 +02002829/* processes a DATA frame. Returns > 0 on success or zero on missing data.
2830 * It may return an error in h2c or h2s. Described in RFC7540#6.1.
2831 */
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01002832static int h2c_handle_data(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02002833{
2834 int error;
2835
Willy Tarreau7838a792019-08-12 18:42:03 +02002836 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2837
Willy Tarreau454f9052017-10-26 19:40:35 +02002838 /* note that empty DATA frames are perfectly valid and sometimes used
2839 * to signal an end of stream (with the ES flag).
2840 */
2841
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002842 if (!b_size(&h2c->dbuf) && h2c->dfl)
Willy Tarreau7838a792019-08-12 18:42:03 +02002843 goto fail; // empty buffer
Willy Tarreau454f9052017-10-26 19:40:35 +02002844
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002845 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002846 goto fail; // incomplete frame
Willy Tarreau454f9052017-10-26 19:40:35 +02002847
2848 /* now either the frame is complete or the buffer is complete */
2849
Willy Tarreau454f9052017-10-26 19:40:35 +02002850 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2851 /* RFC7540#6.1 */
2852 error = H2_ERR_STREAM_CLOSED;
2853 goto strm_err;
2854 }
2855
Christopher Faulet4f09ec82019-06-19 09:25:58 +02002856 if ((h2s->flags & H2_SF_DATA_CLEN) && (h2c->dfl - h2c->dpl) > h2s->body_len) {
Willy Tarreau1915ca22019-01-24 11:49:37 +01002857 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002858 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 +01002859 error = H2_ERR_PROTOCOL_ERROR;
Amaury Denoyellea8879232020-10-27 17:16:03 +01002860 HA_ATOMIC_ADD(&h2c->px_counters->strm_proto_err, 1);
Willy Tarreau1915ca22019-01-24 11:49:37 +01002861 goto strm_err;
2862 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01002863 if (!(h2c->flags & H2_CF_IS_BACK) &&
2864 (h2s->flags & (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT)) == (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT) &&
2865 ((h2c->dfl - h2c->dpl) || !(h2c->dff & H2_F_DATA_END_STREAM))) {
2866 /* a tunnel attempt was aborted but the client still try to send some raw data.
2867 * Thus the stream is closed with the CANCEL error. Here we take care it is not
2868 * an empty DATA Frame with the ES flag. The error is only handled if ES was
2869 * already sent to the client because depending on the scheduling, these data may
2870 * have been sent before the server respnse but not handle here.
2871 */
2872 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2873 error = H2_ERR_CANCEL;
2874 goto strm_err;
2875 }
Willy Tarreau1915ca22019-01-24 11:49:37 +01002876
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002877 if (!h2_frt_transfer_data(h2s))
Willy Tarreau7838a792019-08-12 18:42:03 +02002878 goto fail;
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002879
Willy Tarreau454f9052017-10-26 19:40:35 +02002880 /* call the upper layers to process the frame, then let the upper layer
2881 * notify the stream about any change.
2882 */
2883 if (!h2s->cs) {
Willy Tarreau082c4572019-08-06 10:11:02 +02002884 /* The upper layer has already closed, this may happen on
2885 * 4xx/redirects during POST, or when receiving a response
2886 * from an H2 server after the client has aborted.
2887 */
2888 error = H2_ERR_CANCEL;
Willy Tarreau454f9052017-10-26 19:40:35 +02002889 goto strm_err;
2890 }
2891
Willy Tarreau8f650c32017-11-21 19:36:21 +01002892 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002893 goto fail;
Willy Tarreau8f650c32017-11-21 19:36:21 +01002894
Willy Tarreau721c9742017-11-07 11:05:42 +01002895 if (h2s->st >= H2_SS_ERROR) {
Willy Tarreau454f9052017-10-26 19:40:35 +02002896 /* stream error : send RST_STREAM */
Willy Tarreaua20a5192017-12-27 11:02:06 +01002897 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02002898 }
2899
2900 /* check for completion : the callee will change this to FRAME_A or
2901 * FRAME_H once done.
2902 */
2903 if (h2c->st0 == H2_CS_FRAME_P)
Willy Tarreau7838a792019-08-12 18:42:03 +02002904 goto fail;
Willy Tarreau454f9052017-10-26 19:40:35 +02002905
Willy Tarreauc4134ba2017-12-11 18:45:08 +01002906 /* last frame */
2907 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02002908 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreaufc10f592019-01-30 19:28:32 +01002909 if (h2s->st == H2_SS_OPEN)
2910 h2s->st = H2_SS_HREM;
2911 else
2912 h2s_close(h2s);
2913
Willy Tarreau1915ca22019-01-24 11:49:37 +01002914 if (h2s->flags & H2_SF_DATA_CLEN && h2s->body_len) {
2915 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002916 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 +01002917 error = H2_ERR_PROTOCOL_ERROR;
Amaury Denoyellea8879232020-10-27 17:16:03 +01002918 HA_ATOMIC_ADD(&h2c->px_counters->strm_proto_err, 1);
Willy Tarreau1915ca22019-01-24 11:49:37 +01002919 goto strm_err;
2920 }
Willy Tarreauc4134ba2017-12-11 18:45:08 +01002921 }
2922
Christopher Fauletf95f8762021-01-22 11:59:07 +01002923 /* Unblock busy server h2s waiting for the end of the response for an
2924 * aborted tunnel
2925 */
2926 if ((h2c->flags & H2_CF_IS_BACK) &&
2927 (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)) {
2928 TRACE_STATE("Unblock h2s blocked on tunnel abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2929 h2s->flags &= ~H2_SF_BLK_MBUSY;
2930 }
2931
Willy Tarreau7838a792019-08-12 18:42:03 +02002932 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02002933 return 1;
2934
Willy Tarreau454f9052017-10-26 19:40:35 +02002935 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002936 h2s_error(h2s, error);
2937 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002938 fail:
2939 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 +02002940 return 0;
2941}
2942
Willy Tarreau63864812019-08-07 14:25:20 +02002943/* check that the current frame described in h2c->{dsi,dft,dfl,dff,...} is
2944 * valid for the current stream state. This is needed only after parsing the
2945 * frame header but in practice it can be performed at any time during
2946 * H2_CS_FRAME_P since no state transition happens there. Returns >0 on success
2947 * or 0 in case of error, in which case either h2s or h2c will carry an error.
2948 */
2949static int h2_frame_check_vs_state(struct h2c *h2c, struct h2s *h2s)
2950{
Willy Tarreau7838a792019-08-12 18:42:03 +02002951 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
2952
Willy Tarreau63864812019-08-07 14:25:20 +02002953 if (h2s->st == H2_SS_IDLE &&
2954 h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) {
2955 /* RFC7540#5.1: any frame other than HEADERS or PRIORITY in
2956 * this state MUST be treated as a connection error
2957 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002958 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 +02002959 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002960 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau63864812019-08-07 14:25:20 +02002961 /* only log if no other stream can report the error */
2962 sess_log(h2c->conn->owner);
2963 }
Willy Tarreaua3075282020-12-01 10:22:43 +01002964 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +02002965 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 +02002966 return 0;
2967 }
2968
Willy Tarreau57a18162019-11-24 14:57:53 +01002969 if (h2s->st == H2_SS_IDLE && (h2c->flags & H2_CF_IS_BACK)) {
2970 /* only PUSH_PROMISE would be permitted here */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002971 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 +01002972 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreaua3075282020-12-01 10:22:43 +01002973 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreau57a18162019-11-24 14:57:53 +01002974 TRACE_DEVEL("leaving in error (idle&back)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s);
2975 return 0;
2976 }
2977
Willy Tarreau63864812019-08-07 14:25:20 +02002978 if (h2s->st == H2_SS_HREM && h2c->dft != H2_FT_WINDOW_UPDATE &&
2979 h2c->dft != H2_FT_RST_STREAM && h2c->dft != H2_FT_PRIORITY) {
2980 /* RFC7540#5.1: any frame other than WU/PRIO/RST in
2981 * this state MUST be treated as a stream error.
2982 * 6.2, 6.6 and 6.10 further mandate that HEADERS/
2983 * PUSH_PROMISE/CONTINUATION cause connection errors.
2984 */
Amaury Denoyellea8879232020-10-27 17:16:03 +01002985 if (h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002986 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 +02002987 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreaua3075282020-12-01 10:22:43 +01002988 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Amaury Denoyellea8879232020-10-27 17:16:03 +01002989 }
2990 else {
Willy Tarreau63864812019-08-07 14:25:20 +02002991 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
Amaury Denoyellea8879232020-10-27 17:16:03 +01002992 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002993 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 +02002994 return 0;
2995 }
2996
2997 /* Below the management of frames received in closed state is a
2998 * bit hackish because the spec makes strong differences between
2999 * streams closed by receiving RST, sending RST, and seeing ES
3000 * in both directions. In addition to this, the creation of a
3001 * new stream reusing the identifier of a closed one will be
3002 * detected here. Given that we cannot keep track of all closed
3003 * streams forever, we consider that unknown closed streams were
3004 * closed on RST received, which allows us to respond with an
3005 * RST without breaking the connection (eg: to abort a transfer).
3006 * Some frames have to be silently ignored as well.
3007 */
3008 if (h2s->st == H2_SS_CLOSED && h2c->dsi) {
3009 if (!(h2c->flags & H2_CF_IS_BACK) && h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
3010 /* #5.1.1: The identifier of a newly
3011 * established stream MUST be numerically
3012 * greater than all streams that the initiating
3013 * endpoint has opened or reserved. This
3014 * governs streams that are opened using a
3015 * HEADERS frame and streams that are reserved
3016 * using PUSH_PROMISE. An endpoint that
3017 * receives an unexpected stream identifier
3018 * MUST respond with a connection error.
3019 */
3020 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003021 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 +02003022 return 0;
3023 }
3024
Willy Tarreau4c08f122019-09-26 08:47:15 +02003025 if (h2s->flags & H2_SF_RST_RCVD &&
3026 !(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 +02003027 /* RFC7540#5.1:closed: an endpoint that
3028 * receives any frame other than PRIORITY after
3029 * receiving a RST_STREAM MUST treat that as a
3030 * stream error of type STREAM_CLOSED.
3031 *
3032 * Note that old streams fall into this category
3033 * and will lead to an RST being sent.
3034 *
3035 * However, we cannot generalize this to all frame types. Those
3036 * carrying compression state must still be processed before
3037 * being dropped or we'll desynchronize the decoder. This can
3038 * happen with request trailers received after sending an
3039 * RST_STREAM, or with header/trailers responses received after
3040 * sending RST_STREAM (aborted stream).
Willy Tarreau4c08f122019-09-26 08:47:15 +02003041 *
3042 * In addition, since our CLOSED streams always carry the
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003043 * RST_RCVD bit, we don't want to accidentally catch valid
Willy Tarreau4c08f122019-09-26 08:47:15 +02003044 * frames for a closed stream, i.e. RST/PRIO/WU.
Willy Tarreau63864812019-08-07 14:25:20 +02003045 */
3046 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
3047 h2c->st0 = H2_CS_FRAME_E;
Christopher Faulet6884aa32019-09-23 15:28:20 +02003048 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 +02003049 return 0;
3050 }
3051
3052 /* RFC7540#5.1:closed: if this state is reached as a
3053 * result of sending a RST_STREAM frame, the peer that
3054 * receives the RST_STREAM might have already sent
3055 * frames on the stream that cannot be withdrawn. An
3056 * endpoint MUST ignore frames that it receives on
3057 * closed streams after it has sent a RST_STREAM
3058 * frame. An endpoint MAY choose to limit the period
3059 * over which it ignores frames and treat frames that
3060 * arrive after this time as being in error.
3061 */
3062 if (h2s->id && !(h2s->flags & H2_SF_RST_SENT)) {
3063 /* RFC7540#5.1:closed: any frame other than
3064 * PRIO/WU/RST in this state MUST be treated as
3065 * a connection error
3066 */
3067 if (h2c->dft != H2_FT_RST_STREAM &&
3068 h2c->dft != H2_FT_PRIORITY &&
3069 h2c->dft != H2_FT_WINDOW_UPDATE) {
3070 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003071 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 +02003072 return 0;
3073 }
3074 }
3075 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003076 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02003077 return 1;
3078}
3079
Willy Tarreaubc933932017-10-09 16:21:43 +02003080/* process Rx frames to be demultiplexed */
3081static void h2_process_demux(struct h2c *h2c)
3082{
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003083 struct h2s *h2s = NULL, *tmp_h2s;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003084 struct h2_fh hdr;
3085 unsigned int padlen = 0;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003086 int32_t old_iw = h2c->miw;
Willy Tarreauf3ee0692017-10-17 08:18:25 +02003087
Willy Tarreau7838a792019-08-12 18:42:03 +02003088 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3089
Willy Tarreau081d4722017-05-16 21:51:05 +02003090 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02003091 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02003092
3093 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3094 if (h2c->st0 == H2_CS_PREFACE) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003095 TRACE_STATE("expecting preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02003096 if (h2c->flags & H2_CF_IS_BACK)
Willy Tarreau7838a792019-08-12 18:42:03 +02003097 goto out;
3098
Willy Tarreau52eed752017-09-22 15:05:09 +02003099 if (unlikely(h2c_frt_recv_preface(h2c) <= 0)) {
3100 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02003101 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003102 TRACE_PROTO("failed to receive preface", H2_EV_RX_PREFACE|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003103 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02003104 sess_log(h2c->conn->owner);
3105 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003106 goto fail;
3107 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003108 TRACE_PROTO("received preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003109
3110 h2c->max_id = 0;
3111 h2c->st0 = H2_CS_SETTINGS1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003112 TRACE_STATE("switching to SETTINGS1", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003113 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003114
3115 if (h2c->st0 == H2_CS_SETTINGS1) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003116 /* ensure that what is pending is a valid SETTINGS frame
3117 * without an ACK.
3118 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003119 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 +02003120 if (!h2_get_frame_hdr(&h2c->dbuf, &hdr)) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003121 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02003122 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003123 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 +02003124 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003125 if (!(h2c->flags & H2_CF_IS_BACK))
3126 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02003127 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003128 goto fail;
3129 }
3130
3131 if (hdr.sid || hdr.ft != H2_FT_SETTINGS || hdr.ff & H2_F_SETTINGS_ACK) {
3132 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003133 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 +02003134 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
3135 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003136 if (!(h2c->flags & H2_CF_IS_BACK))
3137 sess_log(h2c->conn->owner);
Amaury Denoyellea8879232020-10-27 17:16:03 +01003138 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003139 goto fail;
3140 }
3141
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003142 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003143 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003144 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 +02003145 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
3146 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003147 if (!(h2c->flags & H2_CF_IS_BACK))
3148 sess_log(h2c->conn->owner);
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003149 goto fail;
3150 }
3151
Willy Tarreau3bf69182018-12-21 15:34:50 +01003152 /* that's OK, switch to FRAME_P to process it. This is
3153 * a SETTINGS frame whose header has already been
3154 * deleted above.
3155 */
Willy Tarreau54f46e52019-01-30 15:11:03 +01003156 padlen = 0;
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +01003157 HA_ATOMIC_ADD(&h2c->px_counters->settings_rcvd, 1);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003158 goto new_frame;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003159 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003160 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003161
3162 /* process as many incoming frames as possible below */
Willy Tarreau7838a792019-08-12 18:42:03 +02003163 while (1) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02003164 int ret = 0;
3165
Willy Tarreau7838a792019-08-12 18:42:03 +02003166 if (!b_data(&h2c->dbuf)) {
3167 TRACE_DEVEL("no more Rx data", H2_EV_RX_FRAME, h2c->conn);
3168 break;
3169 }
3170
3171 if (h2c->st0 >= H2_CS_ERROR) {
3172 TRACE_STATE("end of connection reported", H2_EV_RX_FRAME|H2_EV_RX_EOI, h2c->conn);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003173 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003174 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003175
3176 if (h2c->st0 == H2_CS_FRAME_H) {
Willy Tarreau30d05f32019-08-06 15:49:51 +02003177 h2c->rcvd_s = 0;
3178
Willy Tarreau7838a792019-08-12 18:42:03 +02003179 TRACE_STATE("expecting H2 frame header", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
Willy Tarreaua4428bd2018-12-22 18:11:41 +01003180 if (!h2_peek_frame_hdr(&h2c->dbuf, 0, &hdr))
Willy Tarreau7e98c052017-10-10 15:56:59 +02003181 break;
3182
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003183 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003184 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 +02003185 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003186 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02003187 /* only log if no other stream can report the error */
3188 sess_log(h2c->conn->owner);
3189 }
Willy Tarreaua3075282020-12-01 10:22:43 +01003190 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003191 break;
3192 }
3193
Christopher Fauletdd2a5622019-06-18 12:22:38 +02003194 padlen = 0;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003195 if (h2_ft_bit(hdr.ft) & H2_FT_PADDED_MASK && hdr.ff & H2_F_PADDED) {
3196 /* If the frame is padded (HEADERS, PUSH_PROMISE or DATA),
3197 * we read the pad length and drop it from the remaining
3198 * payload (one byte + the 9 remaining ones = 10 total
3199 * removed), so we have a frame payload starting after the
3200 * pad len. Flow controlled frames (DATA) also count the
3201 * padlen in the flow control, so it must be adjusted.
3202 */
3203 if (hdr.len < 1) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003204 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 +01003205 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003206 if (!(h2c->flags & H2_CF_IS_BACK))
3207 sess_log(h2c->conn->owner);
Willy Tarreaua3075282020-12-01 10:22:43 +01003208 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreau3bf69182018-12-21 15:34:50 +01003209 goto fail;
3210 }
3211 hdr.len--;
3212
3213 if (b_data(&h2c->dbuf) < 10)
3214 break; // missing padlen
3215
3216 padlen = *(uint8_t *)b_peek(&h2c->dbuf, 9);
3217
3218 if (padlen > hdr.len) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003219 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 +01003220 /* RFC7540#6.1 : pad length = length of
3221 * frame payload or greater => error.
3222 */
3223 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003224 if (!(h2c->flags & H2_CF_IS_BACK))
3225 sess_log(h2c->conn->owner);
Willy Tarreaua3075282020-12-01 10:22:43 +01003226 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreau3bf69182018-12-21 15:34:50 +01003227 goto fail;
3228 }
3229
3230 if (h2_ft_bit(hdr.ft) & H2_FT_FC_MASK) {
3231 h2c->rcvd_c++;
3232 h2c->rcvd_s++;
3233 }
3234 b_del(&h2c->dbuf, 1);
3235 }
3236 h2_skip_frame_hdr(&h2c->dbuf);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003237
3238 new_frame:
Willy Tarreau7e98c052017-10-10 15:56:59 +02003239 h2c->dfl = hdr.len;
3240 h2c->dsi = hdr.sid;
3241 h2c->dft = hdr.ft;
3242 h2c->dff = hdr.ff;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003243 h2c->dpl = padlen;
Willy Tarreau73db4342019-09-25 07:28:44 +02003244 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 +02003245 h2c->st0 = H2_CS_FRAME_P;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003246
3247 /* check for minimum basic frame format validity */
3248 ret = h2_frame_check(h2c->dft, 1, h2c->dsi, h2c->dfl, global.tune.bufsize);
3249 if (ret != H2_ERR_NO_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003250 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 +01003251 h2c_error(h2c, ret);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003252 if (!(h2c->flags & H2_CF_IS_BACK))
3253 sess_log(h2c->conn->owner);
Willy Tarreaua3075282020-12-01 10:22:43 +01003254 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003255 goto fail;
3256 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003257 }
3258
Willy Tarreau9fd5aa82019-08-06 15:21:45 +02003259 /* Only H2_CS_FRAME_P, H2_CS_FRAME_A and H2_CS_FRAME_E here.
3260 * H2_CS_FRAME_P indicates an incomplete previous operation
3261 * (most often the first attempt) and requires some validity
3262 * checks for the frame and the current state. The two other
3263 * ones are set after completion (or abortion) and must skip
3264 * validity checks.
3265 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003266 tmp_h2s = h2c_st_by_id(h2c, h2c->dsi);
3267
Willy Tarreau567beb82018-12-18 16:52:44 +01003268 if (tmp_h2s != h2s && h2s && h2s->cs &&
3269 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003270 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003271 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003272 (h2s->flags & H2_SF_ES_RCVD) ||
3273 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003274 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003275 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 +01003276 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003277 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003278 }
3279 h2s = tmp_h2s;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003280
Willy Tarreau63864812019-08-07 14:25:20 +02003281 if (h2c->st0 == H2_CS_FRAME_E ||
Willy Tarreau7838a792019-08-12 18:42:03 +02003282 (h2c->st0 == H2_CS_FRAME_P && !h2_frame_check_vs_state(h2c, h2s))) {
3283 TRACE_PROTO("stream error reported", H2_EV_RX_FRAME|H2_EV_PROTO_ERR, h2c->conn, h2s);
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003284 goto strm_err;
Willy Tarreau7838a792019-08-12 18:42:03 +02003285 }
Willy Tarreauc0da1962017-10-30 18:38:00 +01003286
Willy Tarreau7e98c052017-10-10 15:56:59 +02003287 switch (h2c->dft) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02003288 case H2_FT_SETTINGS:
Willy Tarreau7838a792019-08-12 18:42:03 +02003289 if (h2c->st0 == H2_CS_FRAME_P) {
3290 TRACE_PROTO("receiving H2 SETTINGS frame", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn, h2s);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003291 ret = h2c_handle_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003292 }
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +01003293 HA_ATOMIC_ADD(&h2c->px_counters->settings_rcvd, 1);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003294
Willy Tarreau7838a792019-08-12 18:42:03 +02003295 if (h2c->st0 == H2_CS_FRAME_A) {
3296 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 +02003297 ret = h2c_ack_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003298 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003299 break;
3300
Willy Tarreaucf68c782017-10-10 17:11:41 +02003301 case H2_FT_PING:
Willy Tarreau7838a792019-08-12 18:42:03 +02003302 if (h2c->st0 == H2_CS_FRAME_P) {
3303 TRACE_PROTO("receiving H2 PING frame", H2_EV_RX_FRAME|H2_EV_RX_PING, h2c->conn, h2s);
Willy Tarreaucf68c782017-10-10 17:11:41 +02003304 ret = h2c_handle_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003305 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003306
Willy Tarreau7838a792019-08-12 18:42:03 +02003307 if (h2c->st0 == H2_CS_FRAME_A) {
3308 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 +02003309 ret = h2c_ack_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003310 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003311 break;
3312
Willy Tarreau26f95952017-07-27 17:18:30 +02003313 case H2_FT_WINDOW_UPDATE:
Willy Tarreau7838a792019-08-12 18:42:03 +02003314 if (h2c->st0 == H2_CS_FRAME_P) {
3315 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 +02003316 ret = h2c_handle_window_update(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003317 }
Willy Tarreau26f95952017-07-27 17:18:30 +02003318 break;
3319
Willy Tarreau61290ec2017-10-17 08:19:21 +02003320 case H2_FT_CONTINUATION:
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003321 /* RFC7540#6.10: CONTINUATION may only be preceded by
Willy Tarreauea18f862018-12-22 20:19:26 +01003322 * a HEADERS/PUSH_PROMISE/CONTINUATION frame. These
3323 * frames' parsers consume all following CONTINUATION
3324 * frames so this one is out of sequence.
Willy Tarreau61290ec2017-10-17 08:19:21 +02003325 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003326 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 +01003327 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003328 if (!(h2c->flags & H2_CF_IS_BACK))
3329 sess_log(h2c->conn->owner);
Willy Tarreaua3075282020-12-01 10:22:43 +01003330 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreauea18f862018-12-22 20:19:26 +01003331 goto fail;
Willy Tarreau61290ec2017-10-17 08:19:21 +02003332
Willy Tarreau13278b42017-10-13 19:23:14 +02003333 case H2_FT_HEADERS:
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003334 if (h2c->st0 == H2_CS_FRAME_P) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003335 TRACE_PROTO("receiving H2 HEADERS frame", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02003336 if (h2c->flags & H2_CF_IS_BACK)
3337 tmp_h2s = h2c_bck_handle_headers(h2c, h2s);
3338 else
3339 tmp_h2s = h2c_frt_handle_headers(h2c, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003340 if (tmp_h2s) {
3341 h2s = tmp_h2s;
3342 ret = 1;
3343 }
3344 }
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +01003345 HA_ATOMIC_ADD(&h2c->px_counters->headers_rcvd, 1);
Willy Tarreau13278b42017-10-13 19:23:14 +02003346 break;
3347
Willy Tarreau454f9052017-10-26 19:40:35 +02003348 case H2_FT_DATA:
Willy Tarreau7838a792019-08-12 18:42:03 +02003349 if (h2c->st0 == H2_CS_FRAME_P) {
3350 TRACE_PROTO("receiving H2 DATA frame", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01003351 ret = h2c_handle_data(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003352 }
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +01003353 HA_ATOMIC_ADD(&h2c->px_counters->data_rcvd, 1);
Willy Tarreau454f9052017-10-26 19:40:35 +02003354
Willy Tarreau7838a792019-08-12 18:42:03 +02003355 if (h2c->st0 == H2_CS_FRAME_A) {
3356 TRACE_PROTO("sending stream WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02003357 ret = h2c_send_strm_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003358 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003359 break;
Willy Tarreaucd234e92017-08-18 10:59:39 +02003360
Willy Tarreau92153fc2017-12-03 19:46:19 +01003361 case H2_FT_PRIORITY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003362 if (h2c->st0 == H2_CS_FRAME_P) {
3363 TRACE_PROTO("receiving H2 PRIORITY frame", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn, h2s);
Willy Tarreau92153fc2017-12-03 19:46:19 +01003364 ret = h2c_handle_priority(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003365 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01003366 break;
3367
Willy Tarreaucd234e92017-08-18 10:59:39 +02003368 case H2_FT_RST_STREAM:
Willy Tarreau7838a792019-08-12 18:42:03 +02003369 if (h2c->st0 == H2_CS_FRAME_P) {
3370 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 +02003371 ret = h2c_handle_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003372 }
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +01003373 HA_ATOMIC_ADD(&h2c->px_counters->rst_stream_rcvd, 1);
Willy Tarreaucd234e92017-08-18 10:59:39 +02003374 break;
3375
Willy Tarreaue96b0922017-10-30 00:28:29 +01003376 case H2_FT_GOAWAY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003377 if (h2c->st0 == H2_CS_FRAME_P) {
3378 TRACE_PROTO("receiving H2 GOAWAY frame", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn, h2s);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003379 ret = h2c_handle_goaway(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003380 }
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +01003381 HA_ATOMIC_ADD(&h2c->px_counters->goaway_rcvd, 1);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003382 break;
3383
Willy Tarreau1c661982017-10-30 13:52:01 +01003384 /* implement all extra frame types here */
Willy Tarreau7e98c052017-10-10 15:56:59 +02003385 default:
Willy Tarreau7838a792019-08-12 18:42:03 +02003386 TRACE_PROTO("receiving H2 ignored frame", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003387 /* drop frames that we ignore. They may be larger than
3388 * the buffer so we drain all of their contents until
3389 * we reach the end.
3390 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003391 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3392 b_del(&h2c->dbuf, ret);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003393 h2c->dfl -= ret;
3394 ret = h2c->dfl == 0;
3395 }
3396
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003397 strm_err:
Willy Tarreaua20a5192017-12-27 11:02:06 +01003398 /* We may have to send an RST if not done yet */
Willy Tarreau7838a792019-08-12 18:42:03 +02003399 if (h2s->st == H2_SS_ERROR) {
3400 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 +01003401 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003402 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003403
Willy Tarreau7838a792019-08-12 18:42:03 +02003404 if (h2c->st0 == H2_CS_FRAME_E) {
3405 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 +01003406 ret = h2c_send_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003407 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003408
Willy Tarreau7e98c052017-10-10 15:56:59 +02003409 /* error or missing data condition met above ? */
Willy Tarreau7838a792019-08-12 18:42:03 +02003410 if (ret <= 0) {
3411 TRACE_DEVEL("insufficient data to proceed", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003412 if (h2c->flags & H2_CF_RCVD_SHUT)
3413 h2c->flags |= H2_CF_END_REACHED;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003414 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003415 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003416
3417 if (h2c->st0 != H2_CS_FRAME_H) {
Willy Tarreaubba7a4d2020-09-18 07:41:28 +02003418 if (h2c->dfl)
3419 TRACE_DEVEL("skipping remaining frame payload", H2_EV_RX_FRAME, h2c->conn, h2s);
Christopher Faulet5112a602019-09-26 16:38:28 +02003420 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3421 b_del(&h2c->dbuf, ret);
3422 h2c->dfl -= ret;
3423 if (!h2c->dfl) {
3424 TRACE_STATE("switching to FRAME_H", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
3425 h2c->st0 = H2_CS_FRAME_H;
3426 h2c->dsi = -1;
3427 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003428 }
3429 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003430
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003431 if (h2c->rcvd_c > 0 &&
Willy Tarreau7838a792019-08-12 18:42:03 +02003432 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))) {
3433 TRACE_PROTO("sending H2 WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003434 h2c_send_conn_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003435 }
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003436
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003437 done:
Willy Tarreau567beb82018-12-18 16:52:44 +01003438 if (h2s && h2s->cs &&
3439 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003440 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003441 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003442 (h2s->flags & H2_SF_ES_RCVD) ||
3443 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003444 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003445 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 +01003446 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003447 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003448 }
Willy Tarreau1ed87b72018-11-25 08:45:16 +01003449
Willy Tarreau7838a792019-08-12 18:42:03 +02003450 if (old_iw != h2c->miw) {
3451 TRACE_STATE("notifying streams about SFCTL increase", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003452 h2c_unblock_sfctl(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003453 }
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003454
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003455 h2c_restart_reading(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02003456 out:
3457 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003458 return;
3459
3460 fail:
3461 /* we can go here on missing data, blocked response or error, but we
3462 * need to check if we've met a short read condition.
3463 */
3464 if (h2c->flags & H2_CF_RCVD_SHUT)
3465 h2c->flags |= H2_CF_END_REACHED;
3466 goto done;
Willy Tarreaubc933932017-10-09 16:21:43 +02003467}
3468
Willy Tarreau989539b2020-01-10 17:01:29 +01003469/* resume each h2s eligible for sending in list head <head> */
3470static void h2_resume_each_sending_h2s(struct h2c *h2c, struct list *head)
3471{
3472 struct h2s *h2s, *h2s_back;
3473
3474 TRACE_ENTER(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3475
3476 list_for_each_entry_safe(h2s, h2s_back, head, list) {
3477 if (h2c->mws <= 0 ||
3478 h2c->flags & H2_CF_MUX_BLOCK_ANY ||
3479 h2c->st0 >= H2_CS_ERROR)
3480 break;
3481
3482 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003483
Willy Tarreaud9464162020-01-10 18:25:07 +01003484 if (h2s->flags & H2_SF_NOTIFIED)
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003485 continue;
3486
Willy Tarreau5723f292020-01-10 15:16:57 +01003487 /* If the sender changed his mind and unsubscribed, let's just
3488 * remove the stream from the send_list.
Willy Tarreau989539b2020-01-10 17:01:29 +01003489 */
Willy Tarreauf96508a2020-01-10 11:12:48 +01003490 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) &&
3491 (!h2s->subs || !(h2s->subs->events & SUB_RETRY_SEND))) {
Willy Tarreau989539b2020-01-10 17:01:29 +01003492 LIST_DEL_INIT(&h2s->list);
3493 continue;
3494 }
3495
Willy Tarreauf96508a2020-01-10 11:12:48 +01003496 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau5723f292020-01-10 15:16:57 +01003497 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01003498 tasklet_wakeup(h2s->subs->tasklet);
3499 h2s->subs->events &= ~SUB_RETRY_SEND;
3500 if (!h2s->subs->events)
3501 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01003502 }
3503 else if (h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) {
3504 tasklet_wakeup(h2s->shut_tl);
3505 }
Willy Tarreau989539b2020-01-10 17:01:29 +01003506 }
3507
3508 TRACE_LEAVE(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3509}
3510
Willy Tarreaubc933932017-10-09 16:21:43 +02003511/* process Tx frames from streams to be multiplexed. Returns > 0 if it reached
3512 * the end.
3513 */
3514static int h2_process_mux(struct h2c *h2c)
3515{
Willy Tarreau7838a792019-08-12 18:42:03 +02003516 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3517
Willy Tarreau01b44822018-10-03 14:26:37 +02003518 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3519 if (unlikely(h2c->st0 == H2_CS_PREFACE && (h2c->flags & H2_CF_IS_BACK))) {
3520 if (unlikely(h2c_bck_send_preface(h2c) <= 0)) {
3521 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003522 if (h2c->st0 == H2_CS_ERROR)
Willy Tarreau01b44822018-10-03 14:26:37 +02003523 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau01b44822018-10-03 14:26:37 +02003524 goto fail;
3525 }
3526 h2c->st0 = H2_CS_SETTINGS1;
3527 }
3528 /* need to wait for the other side */
Willy Tarreau75a930a2018-12-12 08:03:58 +01003529 if (h2c->st0 < H2_CS_FRAME_H)
Willy Tarreau7838a792019-08-12 18:42:03 +02003530 goto done;
Willy Tarreau01b44822018-10-03 14:26:37 +02003531 }
3532
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003533 /* start by sending possibly pending window updates */
Willy Tarreaue74679a2019-08-06 15:39:32 +02003534 if (h2c->rcvd_s > 0 &&
3535 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3536 h2c_send_strm_wu(h2c) < 0)
3537 goto fail;
3538
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003539 if (h2c->rcvd_c > 0 &&
3540 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3541 h2c_send_conn_wu(h2c) < 0)
3542 goto fail;
3543
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003544 /* First we always process the flow control list because the streams
3545 * waiting there were already elected for immediate emission but were
3546 * blocked just on this.
3547 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003548 h2_resume_each_sending_h2s(h2c, &h2c->fctl_list);
3549 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003550
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003551 fail:
Willy Tarreau3eabe9b2017-11-07 11:03:01 +01003552 if (unlikely(h2c->st0 >= H2_CS_ERROR)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02003553 if (h2c->st0 == H2_CS_ERROR) {
3554 if (h2c->max_id >= 0) {
3555 h2c_send_goaway_error(h2c, NULL);
3556 if (h2c->flags & H2_CF_MUX_BLOCK_ANY)
Willy Tarreau7838a792019-08-12 18:42:03 +02003557 goto out0;
Willy Tarreau081d4722017-05-16 21:51:05 +02003558 }
3559
3560 h2c->st0 = H2_CS_ERROR2; // sent (or failed hard) !
3561 }
Willy Tarreau081d4722017-05-16 21:51:05 +02003562 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003563 done:
3564 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
3565 return 1;
3566 out0:
3567 TRACE_DEVEL("leaving in blocked situation", H2_EV_H2C_WAKE, h2c->conn);
3568 return 0;
Willy Tarreaubc933932017-10-09 16:21:43 +02003569}
3570
Willy Tarreau62f52692017-10-08 23:01:42 +02003571
Willy Tarreau479998a2018-11-18 06:30:59 +01003572/* Attempt to read data, and subscribe if none available.
3573 * The function returns 1 if data has been received, otherwise zero.
3574 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003575static int h2_recv(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003576{
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003577 struct connection *conn = h2c->conn;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003578 struct buffer *buf;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003579 int max;
Olivier Houchard7505f942018-08-21 18:10:44 +02003580 size_t ret;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003581
Willy Tarreau7838a792019-08-12 18:42:03 +02003582 TRACE_ENTER(H2_EV_H2C_RECV, h2c->conn);
3583
3584 if (h2c->wait_event.events & SUB_RETRY_RECV) {
3585 TRACE_DEVEL("leaving on sub_recv", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003586 return (b_data(&h2c->dbuf));
Willy Tarreau7838a792019-08-12 18:42:03 +02003587 }
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003588
Willy Tarreau7838a792019-08-12 18:42:03 +02003589 if (!h2_recv_allowed(h2c)) {
3590 TRACE_DEVEL("leaving on !recv_allowed", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003591 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003592 }
Willy Tarreaua2af5122017-10-09 11:56:46 +02003593
Willy Tarreau44e973f2018-03-01 17:49:30 +01003594 buf = h2_get_buf(h2c, &h2c->dbuf);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003595 if (!buf) {
3596 h2c->flags |= H2_CF_DEM_DALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02003597 TRACE_DEVEL("leaving on !alloc", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003598 return 0;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003599 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003600
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003601 if (h2c->flags & H2_CF_RCVD_SHUT) {
3602 TRACE_DEVEL("leaving on rcvd_shut", H2_EV_H2C_RECV, h2c->conn);
3603 return 0;
3604 }
3605
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003606 b_realign_if_empty(buf);
3607 if (!b_data(buf)) {
3608 /* try to pre-align the buffer like the
3609 * rxbufs will be to optimize memory copies. We'll make
3610 * sure that the frame header lands at the end of the
3611 * HTX block to alias it upon recv. We cannot use the
3612 * head because rcv_buf() will realign the buffer if
3613 * it's empty. Thus we cheat and pretend we already
3614 * have a few bytes there.
3615 */
3616 max = buf_room_for_htx_data(buf) + 9;
3617 buf->head = sizeof(struct htx) - 9;
3618 }
3619 else
3620 max = b_room(buf);
Willy Tarreau2a59e872018-12-12 08:23:47 +01003621
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003622 ret = max ? conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0) : 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003623
Willy Tarreau7838a792019-08-12 18:42:03 +02003624 if (max && !ret && h2_recv_allowed(h2c)) {
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003625 if (conn_xprt_read0_pending(h2c->conn)) {
3626 TRACE_DATA("received read0", H2_EV_H2C_RECV, h2c->conn);
3627 h2c->flags |= H2_CF_RCVD_SHUT;
3628 } else {
3629 TRACE_DATA("failed to receive data, subscribing", H2_EV_H2C_RECV, h2c->conn);
3630 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h2c->wait_event);
3631 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003632 } else if (ret)
Willy Tarreau022e5e52020-09-10 09:33:15 +02003633 TRACE_DATA("received data", H2_EV_H2C_RECV, h2c->conn, 0, 0, (void*)(long)ret);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003634
Olivier Houcharda1411e62018-08-17 18:42:48 +02003635 if (!b_data(buf)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +01003636 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02003637 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard46677732018-11-29 17:06:17 +01003638 return (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003639 }
3640
Willy Tarreau7838a792019-08-12 18:42:03 +02003641 if (b_data(buf) == buf->size) {
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003642 h2c->flags |= H2_CF_DEM_DFULL;
Willy Tarreau35fb8462019-10-02 11:05:46 +02003643 TRACE_STATE("demux buffer full", H2_EV_H2C_RECV|H2_EV_H2C_BLK, h2c->conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003644 }
3645
3646 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003647 return !!ret || (conn->flags & CO_FL_ERROR) || conn_xprt_read0_pending(conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003648}
3649
Willy Tarreau479998a2018-11-18 06:30:59 +01003650/* Try to send data if possible.
3651 * The function returns 1 if data have been sent, otherwise zero.
3652 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003653static int h2_send(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003654{
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003655 struct connection *conn = h2c->conn;
Willy Tarreaubc933932017-10-09 16:21:43 +02003656 int done;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003657 int sent = 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003658
Willy Tarreau7838a792019-08-12 18:42:03 +02003659 TRACE_ENTER(H2_EV_H2C_SEND, h2c->conn);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003660
Willy Tarreau7838a792019-08-12 18:42:03 +02003661 if (conn->flags & CO_FL_ERROR) {
3662 TRACE_DEVEL("leaving on error", H2_EV_H2C_SEND, h2c->conn);
3663 return 1;
3664 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003665
Willy Tarreau911db9b2020-01-23 16:27:54 +01003666 if (conn->flags & CO_FL_WAIT_XPRT) {
Willy Tarreaua2af5122017-10-09 11:56:46 +02003667 /* a handshake was requested */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003668 goto schedule;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003669 }
3670
Willy Tarreaubc933932017-10-09 16:21:43 +02003671 /* This loop is quite simple : it tries to fill as much as it can from
3672 * pending streams into the existing buffer until it's reportedly full
3673 * or the end of send requests is reached. Then it tries to send this
3674 * buffer's contents out, marks it not full if at least one byte could
3675 * be sent, and tries again.
3676 *
3677 * The snd_buf() function normally takes a "flags" argument which may
3678 * be made of a combination of CO_SFL_MSG_MORE to indicate that more
3679 * data immediately comes and CO_SFL_STREAMER to indicate that the
3680 * connection is streaming lots of data (used to increase TLS record
3681 * size at the expense of latency). The former can be sent any time
3682 * there's a buffer full flag, as it indicates at least one stream
3683 * attempted to send and failed so there are pending data. An
3684 * alternative would be to set it as long as there's an active stream
3685 * but that would be problematic for ACKs until we have an absolute
3686 * guarantee that all waiters have at least one byte to send. The
3687 * latter should possibly not be set for now.
3688 */
3689
3690 done = 0;
3691 while (!done) {
3692 unsigned int flags = 0;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003693 unsigned int released = 0;
3694 struct buffer *buf;
Willy Tarreaubc933932017-10-09 16:21:43 +02003695
3696 /* fill as much as we can into the current buffer */
3697 while (((h2c->flags & (H2_CF_MUX_MFULL|H2_CF_MUX_MALLOC)) == 0) && !done)
3698 done = h2_process_mux(h2c);
3699
Olivier Houchard2b094432019-01-29 18:28:36 +01003700 if (h2c->flags & H2_CF_MUX_MALLOC)
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003701 done = 1; // we won't go further without extra buffers
Olivier Houchard2b094432019-01-29 18:28:36 +01003702
Christopher Faulet9a3d3fc2020-10-22 16:24:58 +02003703 if ((conn->flags & (CO_FL_SOCK_WR_SH|CO_FL_ERROR)) ||
3704 (h2c->st0 == H2_CS_ERROR2) || (h2c->flags & H2_CF_GOAWAY_FAILED))
Willy Tarreaubc933932017-10-09 16:21:43 +02003705 break;
3706
3707 if (h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))
3708 flags |= CO_SFL_MSG_MORE;
3709
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003710 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3711 if (b_data(buf)) {
3712 int ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, buf, b_data(buf), flags);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003713 if (!ret) {
3714 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003715 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003716 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003717 sent = 1;
Willy Tarreau022e5e52020-09-10 09:33:15 +02003718 TRACE_DATA("sent data", H2_EV_H2C_SEND, h2c->conn, 0, buf, (void*)(long)ret);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003719 b_del(buf, ret);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003720 if (b_data(buf)) {
3721 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003722 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003723 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003724 }
3725 b_free(buf);
3726 released++;
Willy Tarreau787db9a2018-06-14 18:31:46 +02003727 }
Willy Tarreaubc933932017-10-09 16:21:43 +02003728
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003729 if (released)
Willy Tarreau201840a2019-05-29 17:50:48 +02003730 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003731
Willy Tarreaubc933932017-10-09 16:21:43 +02003732 /* wrote at least one byte, the buffer is not full anymore */
Christopher Faulet69fe5ce2019-10-24 10:31:01 +02003733 if (sent)
3734 h2c->flags &= ~(H2_CF_MUX_MFULL | H2_CF_DEM_MROOM);
Willy Tarreaubc933932017-10-09 16:21:43 +02003735 }
3736
Willy Tarreaua2af5122017-10-09 11:56:46 +02003737 if (conn->flags & CO_FL_SOCK_WR_SH) {
3738 /* output closed, nothing to send, clear the buffer to release it */
Willy Tarreau51330962019-05-26 09:38:07 +02003739 b_reset(br_tail(h2c->mbuf));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003740 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02003741 /* We're not full anymore, so we can wake any task that are waiting
3742 * for us.
3743 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003744 if (!(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM)) && h2c->st0 >= H2_CS_FRAME_H)
3745 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01003746
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003747 /* We're done, no more to send */
Willy Tarreau7838a792019-08-12 18:42:03 +02003748 if (!br_data(h2c->mbuf)) {
3749 TRACE_DEVEL("leaving with everything sent", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003750 return sent;
Willy Tarreau7838a792019-08-12 18:42:03 +02003751 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003752schedule:
Willy Tarreau7838a792019-08-12 18:42:03 +02003753 if (!(conn->flags & CO_FL_ERROR) && !(h2c->wait_event.events & SUB_RETRY_SEND)) {
3754 TRACE_STATE("more data to send, subscribing", H2_EV_H2C_SEND, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003755 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003756 }
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003757
Willy Tarreau7838a792019-08-12 18:42:03 +02003758 TRACE_DEVEL("leaving with some data left to send", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003759 return sent;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003760}
3761
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003762/* this is the tasklet referenced in h2c->wait_event.tasklet */
Willy Tarreau691d5032021-01-20 14:55:01 +01003763struct task *h2_io_cb(struct task *t, void *ctx, unsigned short status)
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003764{
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003765 struct connection *conn;
3766 struct tasklet *tl = (struct tasklet *)t;
3767 int conn_in_list;
3768 struct h2c *h2c;
Olivier Houchard7505f942018-08-21 18:10:44 +02003769 int ret = 0;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003770
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003771
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02003772 HA_SPIN_LOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003773 if (t->context == NULL) {
3774 /* The connection has been taken over by another thread,
3775 * we're no longer responsible for it, so just free the
3776 * tasklet, and do nothing.
3777 */
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02003778 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003779 tasklet_free(tl);
Willy Tarreau38468772020-06-28 00:31:13 +02003780 goto leave;
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003781 }
3782 h2c = ctx;
3783 conn = h2c->conn;
3784
3785 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3786
3787 conn_in_list = conn->flags & CO_FL_LIST_MASK;
3788
3789 /* Remove the connection from the list, to be sure nobody attempts
3790 * to use it while we handle the I/O events
3791 */
3792 if (conn_in_list)
3793 MT_LIST_DEL(&conn->list);
3794
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02003795 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Willy Tarreau7838a792019-08-12 18:42:03 +02003796
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003797 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchard7505f942018-08-21 18:10:44 +02003798 ret = h2_send(h2c);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003799 if (!(h2c->wait_event.events & SUB_RETRY_RECV))
Olivier Houchard7505f942018-08-21 18:10:44 +02003800 ret |= h2_recv(h2c);
Willy Tarreaucef5c8e2018-12-18 10:29:54 +01003801 if (ret || b_data(&h2c->dbuf))
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003802 ret = h2_process(h2c);
3803
3804 /* If we were in an idle list, we want to add it back into it,
3805 * unless h2_process() returned -1, which mean it has destroyed
3806 * the connection (testing !ret is enough, if h2_process() wasn't
3807 * called then ret will be 0 anyway.
3808 */
3809 if (!ret && conn_in_list) {
3810 struct server *srv = objt_server(conn->target);
3811
3812 if (conn_in_list == CO_FL_SAFE_LIST)
Willy Tarreaua9d7b762020-07-10 08:28:20 +02003813 MT_LIST_ADDQ(&srv->safe_conns[tid], &conn->list);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003814 else
Willy Tarreaua9d7b762020-07-10 08:28:20 +02003815 MT_LIST_ADDQ(&srv->idle_conns[tid], &conn->list);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003816 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003817
Willy Tarreau38468772020-06-28 00:31:13 +02003818leave:
Willy Tarreau7838a792019-08-12 18:42:03 +02003819 TRACE_LEAVE(H2_EV_H2C_WAKE);
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003820 return NULL;
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003821}
Willy Tarreaua2af5122017-10-09 11:56:46 +02003822
Willy Tarreau62f52692017-10-08 23:01:42 +02003823/* callback called on any event by the connection handler.
3824 * It applies changes and returns zero, or < 0 if it wants immediate
3825 * destruction of the connection (which normally doesn not happen in h2).
3826 */
Olivier Houchard7505f942018-08-21 18:10:44 +02003827static int h2_process(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003828{
Olivier Houchard7505f942018-08-21 18:10:44 +02003829 struct connection *conn = h2c->conn;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003830
Willy Tarreau7838a792019-08-12 18:42:03 +02003831 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3832
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003833 if (b_data(&h2c->dbuf) && !(h2c->flags & H2_CF_DEM_BLOCK_ANY)) {
Willy Tarreaud13bf272017-12-14 10:34:52 +01003834 h2_process_demux(h2c);
3835
3836 if (h2c->st0 >= H2_CS_ERROR || conn->flags & CO_FL_ERROR)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003837 b_reset(&h2c->dbuf);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003838
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003839 if (!b_full(&h2c->dbuf))
Willy Tarreaud13bf272017-12-14 10:34:52 +01003840 h2c->flags &= ~H2_CF_DEM_DFULL;
3841 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003842 h2_send(h2c);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003843
Willy Tarreaub1e600c2020-10-13 18:09:15 +02003844 if (unlikely(h2c->proxy->disabled) && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau8ec14062017-12-30 18:08:13 +01003845 /* frontend is stopping, reload likely in progress, let's try
3846 * to announce a graceful shutdown if not yet done. We don't
3847 * care if it fails, it will be tried again later.
3848 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003849 TRACE_STATE("proxy stopped, sending GOAWAY", H2_EV_H2C_WAKE|H2_EV_TX_FRAME, conn);
Willy Tarreau8ec14062017-12-30 18:08:13 +01003850 if (!(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
3851 if (h2c->last_sid < 0)
3852 h2c->last_sid = (1U << 31) - 1;
3853 h2c_send_goaway_error(h2c, NULL);
3854 }
3855 }
3856
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003857 /*
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003858 * If we received early data, and the handshake is done, wake
3859 * any stream that was waiting for it.
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003860 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003861 if (!(h2c->flags & H2_CF_WAIT_FOR_HS) &&
Willy Tarreau911db9b2020-01-23 16:27:54 +01003862 (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 +01003863 struct eb32_node *node;
3864 struct h2s *h2s;
3865
3866 h2c->flags |= H2_CF_WAIT_FOR_HS;
3867 node = eb32_lookup_ge(&h2c->streams_by_id, 1);
3868
3869 while (node) {
3870 h2s = container_of(node, struct h2s, by_id);
Willy Tarreaufde287c2018-12-19 18:33:16 +01003871 if (h2s->cs && h2s->cs->flags & CS_FL_WAIT_FOR_HS)
Willy Tarreau7e094452018-12-19 18:08:52 +01003872 h2s_notify_recv(h2s);
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003873 node = eb32_next(node);
3874 }
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003875 }
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003876
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003877 if (conn->flags & CO_FL_ERROR || h2c_read0_pending(h2c) ||
Willy Tarreau29a98242017-10-31 06:59:15 +01003878 h2c->st0 == H2_CS_ERROR2 || h2c->flags & H2_CF_GOAWAY_FAILED ||
3879 (eb_is_empty(&h2c->streams_by_id) && h2c->last_sid >= 0 &&
3880 h2c->max_id >= h2c->last_sid)) {
Willy Tarreau23482912019-05-07 15:23:14 +02003881 h2_wake_some_streams(h2c, 0);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003882
3883 if (eb_is_empty(&h2c->streams_by_id)) {
3884 /* no more stream, kill the connection now */
Christopher Faulet73c12072019-04-08 11:23:22 +02003885 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003886 TRACE_DEVEL("leaving after releasing the connection", H2_EV_H2C_WAKE);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003887 return -1;
3888 }
Willy Tarreau4481e262019-10-31 15:36:30 +01003889
3890 /* connections in error must be removed from the idle lists */
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02003891 HA_SPIN_LOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Willy Tarreau4481e262019-10-31 15:36:30 +01003892 MT_LIST_DEL((struct mt_list *)&conn->list);
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02003893 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Willy Tarreau4481e262019-10-31 15:36:30 +01003894 }
3895 else if (h2c->st0 == H2_CS_ERROR) {
3896 /* connections in error must be removed from the idle lists */
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02003897 HA_SPIN_LOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Willy Tarreau4481e262019-10-31 15:36:30 +01003898 MT_LIST_DEL((struct mt_list *)&conn->list);
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02003899 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003900 }
3901
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003902 if (!b_data(&h2c->dbuf))
Willy Tarreau44e973f2018-03-01 17:49:30 +01003903 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003904
Olivier Houchard53216e72018-10-10 15:46:36 +02003905 if ((conn->flags & CO_FL_SOCK_WR_SH) ||
3906 h2c->st0 == H2_CS_ERROR2 || (h2c->flags & H2_CF_GOAWAY_FAILED) ||
3907 (h2c->st0 != H2_CS_ERROR &&
Willy Tarreau662fafc2019-05-26 09:43:07 +02003908 !br_data(h2c->mbuf) &&
Olivier Houchard53216e72018-10-10 15:46:36 +02003909 (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) &&
3910 ((h2c->flags & H2_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&h2c->send_list))))
Willy Tarreau2e3c0002019-05-26 09:45:23 +02003911 h2_release_mbuf(h2c);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003912
Willy Tarreau3f133572017-10-31 19:21:06 +01003913 if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02003914 if (h2c_may_expire(h2c))
3915 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
3916 else
3917 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02003918 task_queue(h2c->task);
Willy Tarreauea392822017-10-31 10:02:25 +01003919 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003920
Olivier Houchard7505f942018-08-21 18:10:44 +02003921 h2_send(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003922 TRACE_LEAVE(H2_EV_H2C_WAKE, conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003923 return 0;
3924}
3925
Willy Tarreau749f5ca2019-03-21 19:19:36 +01003926/* wake-up function called by the connection layer (mux_ops.wake) */
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003927static int h2_wake(struct connection *conn)
3928{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003929 struct h2c *h2c = conn->ctx;
Willy Tarreau7838a792019-08-12 18:42:03 +02003930 int ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003931
Willy Tarreau7838a792019-08-12 18:42:03 +02003932 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3933 ret = h2_process(h2c);
Willy Tarreau508f9892020-02-11 04:38:56 +01003934 if (ret >= 0)
3935 h2_wake_some_streams(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02003936 TRACE_LEAVE(H2_EV_H2C_WAKE);
3937 return ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003938}
3939
Willy Tarreauea392822017-10-31 10:02:25 +01003940/* Connection timeout management. The principle is that if there's no receipt
3941 * nor sending for a certain amount of time, the connection is closed. If the
3942 * MUX buffer still has lying data or is not allocatable, the connection is
3943 * immediately killed. If it's allocatable and empty, we attempt to send a
3944 * GOAWAY frame.
3945 */
Olivier Houchard9f6af332018-05-25 14:04:04 +02003946static struct task *h2_timeout_task(struct task *t, void *context, unsigned short state)
Willy Tarreauea392822017-10-31 10:02:25 +01003947{
Olivier Houchard9f6af332018-05-25 14:04:04 +02003948 struct h2c *h2c = context;
Willy Tarreauea392822017-10-31 10:02:25 +01003949 int expired = tick_is_expired(t->expire, now_ms);
3950
Willy Tarreau7838a792019-08-12 18:42:03 +02003951 TRACE_ENTER(H2_EV_H2C_WAKE, h2c ? h2c->conn : NULL);
3952
Willy Tarreaubd42e922020-06-30 11:19:23 +02003953 if (h2c) {
Olivier Houchard48ce6a32020-07-02 11:58:05 +02003954 /* Make sure nobody stole the connection from us */
3955 HA_SPIN_LOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
3956
3957 /* Somebody already stole the connection from us, so we should not
3958 * free it, we just have to free the task.
3959 */
3960 if (!t->context) {
3961 h2c = NULL;
Willy Tarreau46ac7812020-07-04 07:16:18 +02003962 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Olivier Houchard48ce6a32020-07-02 11:58:05 +02003963 goto do_leave;
3964 }
3965
3966
Willy Tarreaubd42e922020-06-30 11:19:23 +02003967 if (!expired) {
Olivier Houchard48ce6a32020-07-02 11:58:05 +02003968 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02003969 TRACE_DEVEL("leaving (not expired)", H2_EV_H2C_WAKE, h2c->conn);
3970 return t;
3971 }
Willy Tarreauea392822017-10-31 10:02:25 +01003972
Willy Tarreaubd42e922020-06-30 11:19:23 +02003973 if (!h2c_may_expire(h2c)) {
3974 /* we do still have streams but all of them are idle, waiting
3975 * for the data layer, so we must not enforce the timeout here.
3976 */
Olivier Houchard48ce6a32020-07-02 11:58:05 +02003977 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02003978 t->expire = TICK_ETERNITY;
3979 return t;
3980 }
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02003981
Willy Tarreaubd42e922020-06-30 11:19:23 +02003982 /* We're about to destroy the connection, so make sure nobody attempts
3983 * to steal it from us.
3984 */
Willy Tarreaubd42e922020-06-30 11:19:23 +02003985 if (h2c->conn->flags & CO_FL_LIST_MASK)
3986 MT_LIST_DEL(&h2c->conn->list);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003987
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02003988 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02003989 }
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003990
Olivier Houchard48ce6a32020-07-02 11:58:05 +02003991do_leave:
Olivier Houchard3f795f72019-04-17 22:51:06 +02003992 task_destroy(t);
Willy Tarreau0975f112018-03-29 15:22:59 +02003993
3994 if (!h2c) {
3995 /* resources were already deleted */
Willy Tarreau7838a792019-08-12 18:42:03 +02003996 TRACE_DEVEL("leaving (not more h2c)", H2_EV_H2C_WAKE);
Willy Tarreau0975f112018-03-29 15:22:59 +02003997 return NULL;
3998 }
3999
4000 h2c->task = NULL;
Willy Tarreauea392822017-10-31 10:02:25 +01004001 h2c_error(h2c, H2_ERR_NO_ERROR);
Willy Tarreau23482912019-05-07 15:23:14 +02004002 h2_wake_some_streams(h2c, 0);
Willy Tarreauea392822017-10-31 10:02:25 +01004003
Willy Tarreau662fafc2019-05-26 09:43:07 +02004004 if (br_data(h2c->mbuf)) {
Willy Tarreauea392822017-10-31 10:02:25 +01004005 /* don't even try to send a GOAWAY, the buffer is stuck */
4006 h2c->flags |= H2_CF_GOAWAY_FAILED;
4007 }
4008
4009 /* try to send but no need to insist */
Willy Tarreau599391a2017-11-24 10:16:00 +01004010 h2c->last_sid = h2c->max_id;
Willy Tarreauea392822017-10-31 10:02:25 +01004011 if (h2c_send_goaway_error(h2c, NULL) <= 0)
4012 h2c->flags |= H2_CF_GOAWAY_FAILED;
4013
Willy Tarreau662fafc2019-05-26 09:43:07 +02004014 if (br_data(h2c->mbuf) && !(h2c->flags & H2_CF_GOAWAY_FAILED) && conn_xprt_ready(h2c->conn)) {
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004015 unsigned int released = 0;
4016 struct buffer *buf;
4017
4018 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
4019 if (b_data(buf)) {
4020 int ret = h2c->conn->xprt->snd_buf(h2c->conn, h2c->conn->xprt_ctx, buf, b_data(buf), 0);
4021 if (!ret)
4022 break;
4023 b_del(buf, ret);
4024 if (b_data(buf))
4025 break;
4026 b_free(buf);
4027 released++;
4028 }
Willy Tarreau787db9a2018-06-14 18:31:46 +02004029 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004030
4031 if (released)
Willy Tarreau201840a2019-05-29 17:50:48 +02004032 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau787db9a2018-06-14 18:31:46 +02004033 }
Willy Tarreauea392822017-10-31 10:02:25 +01004034
Willy Tarreau4481e262019-10-31 15:36:30 +01004035 /* in any case this connection must not be considered idle anymore */
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02004036 HA_SPIN_LOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Willy Tarreau4481e262019-10-31 15:36:30 +01004037 MT_LIST_DEL((struct mt_list *)&h2c->conn->list);
Olivier Houchardf8f4c2e2020-06-29 20:15:59 +02004038 HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conns[tid].takeover_lock);
Willy Tarreau4481e262019-10-31 15:36:30 +01004039
Willy Tarreau0975f112018-03-29 15:22:59 +02004040 /* either we can release everything now or it will be done later once
4041 * the last stream closes.
4042 */
4043 if (eb_is_empty(&h2c->streams_by_id))
Christopher Faulet73c12072019-04-08 11:23:22 +02004044 h2_release(h2c);
Willy Tarreauea392822017-10-31 10:02:25 +01004045
Willy Tarreau7838a792019-08-12 18:42:03 +02004046 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreauea392822017-10-31 10:02:25 +01004047 return NULL;
4048}
4049
4050
Willy Tarreau62f52692017-10-08 23:01:42 +02004051/*******************************************/
4052/* functions below are used by the streams */
4053/*******************************************/
4054
4055/*
4056 * Attach a new stream to a connection
4057 * (Used for outgoing connections)
4058 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01004059static struct conn_stream *h2_attach(struct connection *conn, struct session *sess)
Willy Tarreau62f52692017-10-08 23:01:42 +02004060{
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004061 struct conn_stream *cs;
4062 struct h2s *h2s;
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004063 struct h2c *h2c = conn->ctx;
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004064
Willy Tarreau7838a792019-08-12 18:42:03 +02004065 TRACE_ENTER(H2_EV_H2S_NEW, conn);
Christopher Faulet236c93b2020-07-02 09:19:54 +02004066 cs = cs_new(conn, conn->target);
Willy Tarreau7838a792019-08-12 18:42:03 +02004067 if (!cs) {
4068 TRACE_DEVEL("leaving on CS allocation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004069 return NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004070 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01004071 h2s = h2c_bck_stream_new(h2c, cs, sess);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004072 if (!h2s) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004073 TRACE_DEVEL("leaving on stream creation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004074 cs_free(cs);
4075 return NULL;
4076 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004077 TRACE_LEAVE(H2_EV_H2S_NEW, conn, h2s);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004078 return cs;
Willy Tarreau62f52692017-10-08 23:01:42 +02004079}
4080
Willy Tarreaufafd3982018-11-18 21:29:20 +01004081/* Retrieves the first valid conn_stream from this connection, or returns NULL.
4082 * We have to scan because we may have some orphan streams. It might be
4083 * beneficial to scan backwards from the end to reduce the likeliness to find
4084 * orphans.
4085 */
4086static const struct conn_stream *h2_get_first_cs(const struct connection *conn)
4087{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004088 struct h2c *h2c = conn->ctx;
Willy Tarreaufafd3982018-11-18 21:29:20 +01004089 struct h2s *h2s;
4090 struct eb32_node *node;
4091
4092 node = eb32_first(&h2c->streams_by_id);
4093 while (node) {
4094 h2s = container_of(node, struct h2s, by_id);
4095 if (h2s->cs)
4096 return h2s->cs;
4097 node = eb32_next(node);
4098 }
4099 return NULL;
4100}
4101
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004102static int h2_ctl(struct connection *conn, enum mux_ctl_type mux_ctl, void *output)
4103{
4104 int ret = 0;
4105 struct h2c *h2c = conn->ctx;
4106
4107 switch (mux_ctl) {
4108 case MUX_STATUS:
4109 /* Only consider the mux to be ready if we're done with
4110 * the preface and settings, and we had no error.
4111 */
4112 if (h2c->st0 >= H2_CS_FRAME_H && h2c->st0 < H2_CS_ERROR)
4113 ret |= MUX_STATUS_READY;
4114 return ret;
Christopher Faulet4c8ad842020-10-06 14:59:17 +02004115 case MUX_EXIT_STATUS:
4116 return MUX_ES_UNKNOWN;
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004117 default:
4118 return -1;
4119 }
4120}
4121
Willy Tarreau62f52692017-10-08 23:01:42 +02004122/*
Olivier Houchard060ed432018-11-06 16:32:42 +01004123 * Destroy the mux and the associated connection, if it is no longer used
4124 */
Christopher Faulet73c12072019-04-08 11:23:22 +02004125static void h2_destroy(void *ctx)
Olivier Houchard060ed432018-11-06 16:32:42 +01004126{
Christopher Faulet73c12072019-04-08 11:23:22 +02004127 struct h2c *h2c = ctx;
Olivier Houchard060ed432018-11-06 16:32:42 +01004128
Willy Tarreau7838a792019-08-12 18:42:03 +02004129 TRACE_ENTER(H2_EV_H2C_END, h2c->conn);
Christopher Faulet39a96ee2019-04-08 10:52:21 +02004130 if (eb_is_empty(&h2c->streams_by_id) || !h2c->conn || h2c->conn->ctx != h2c)
Christopher Faulet73c12072019-04-08 11:23:22 +02004131 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004132 TRACE_LEAVE(H2_EV_H2C_END);
Olivier Houchard060ed432018-11-06 16:32:42 +01004133}
4134
4135/*
Willy Tarreau62f52692017-10-08 23:01:42 +02004136 * Detach the stream from the connection and possibly release the connection.
4137 */
4138static void h2_detach(struct conn_stream *cs)
4139{
Willy Tarreau60935142017-10-16 18:11:19 +02004140 struct h2s *h2s = cs->ctx;
4141 struct h2c *h2c;
Olivier Houchardf502aca2018-12-14 19:42:40 +01004142 struct session *sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004143
Willy Tarreau7838a792019-08-12 18:42:03 +02004144 TRACE_ENTER(H2_EV_STRM_END, h2s ? h2s->h2c->conn : NULL, h2s);
4145
Willy Tarreau60935142017-10-16 18:11:19 +02004146 cs->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004147 if (!h2s) {
4148 TRACE_LEAVE(H2_EV_STRM_END);
Willy Tarreau60935142017-10-16 18:11:19 +02004149 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004150 }
Willy Tarreau60935142017-10-16 18:11:19 +02004151
Willy Tarreaud9464162020-01-10 18:25:07 +01004152 /* there's no txbuf so we're certain not to be able to send anything */
4153 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02004154
Olivier Houchardf502aca2018-12-14 19:42:40 +01004155 sess = h2s->sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004156 h2c = h2s->h2c;
4157 h2s->cs = NULL;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02004158 h2c->nb_cs--;
Willy Tarreaufa1d3572019-01-31 10:31:51 +01004159 if ((h2c->flags & (H2_CF_IS_BACK|H2_CF_DEM_TOOMANY)) == H2_CF_DEM_TOOMANY &&
4160 !h2_frt_has_too_many_cs(h2c)) {
4161 /* frontend connection was blocking new streams creation */
Willy Tarreauf2101912018-07-19 10:11:38 +02004162 h2c->flags &= ~H2_CF_DEM_TOOMANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004163 h2c_restart_reading(h2c, 1);
Willy Tarreauf2101912018-07-19 10:11:38 +02004164 }
Willy Tarreau60935142017-10-16 18:11:19 +02004165
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004166 /* this stream may be blocked waiting for some data to leave (possibly
4167 * an ES or RST frame), so orphan it in this case.
4168 */
Willy Tarreau3041fcc2018-03-29 15:41:32 +02004169 if (!(cs->conn->flags & CO_FL_ERROR) &&
Willy Tarreaua2b51812018-07-27 09:55:14 +02004170 (h2c->st0 < H2_CS_ERROR) &&
Willy Tarreau5723f292020-01-10 15:16:57 +01004171 (h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL)) &&
Willy Tarreauf96508a2020-01-10 11:12:48 +01004172 ((h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) || h2s->subs)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004173 TRACE_DEVEL("leaving on stream blocked", H2_EV_STRM_END|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004174 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004175 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004176
Willy Tarreau45f752e2017-10-30 15:44:59 +01004177 if ((h2c->flags & H2_CF_DEM_BLOCK_ANY && h2s->id == h2c->dsi) ||
4178 (h2c->flags & H2_CF_MUX_BLOCK_ANY && h2s->id == h2c->msi)) {
4179 /* unblock the connection if it was blocked on this
4180 * stream.
4181 */
4182 h2c->flags &= ~H2_CF_DEM_BLOCK_ANY;
4183 h2c->flags &= ~H2_CF_MUX_BLOCK_ANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004184 h2c_restart_reading(h2c, 1);
Willy Tarreau45f752e2017-10-30 15:44:59 +01004185 }
4186
Willy Tarreau71049cc2018-03-28 13:56:39 +02004187 h2s_destroy(h2s);
Willy Tarreau60935142017-10-16 18:11:19 +02004188
Christopher Faulet9b79a102019-07-15 11:22:56 +02004189 if (h2c->flags & H2_CF_IS_BACK) {
Olivier Houchard8a786902018-12-15 16:05:40 +01004190 if (!(h2c->conn->flags &
4191 (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH))) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004192 if (h2c->conn->flags & CO_FL_PRIVATE) {
Christopher Faulet08016ab2020-07-01 16:10:06 +02004193 /* Add the connection in the session server list, if not already done */
4194 if (!session_add_conn(sess, h2c->conn, h2c->conn->target)) {
4195 h2c->conn->owner = NULL;
4196 if (eb_is_empty(&h2c->streams_by_id)) {
4197 h2c->conn->mux->destroy(h2c);
4198 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4199 return;
Christopher Fauletc5579d12020-07-01 15:45:41 +02004200 }
4201 }
Christopher Faulet08016ab2020-07-01 16:10:06 +02004202 if (eb_is_empty(&h2c->streams_by_id)) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004203 if (session_check_idle_conn(h2c->conn->owner, h2c->conn) != 0) {
4204 /* At this point either the connection is destroyed, or it's been added to the server idle list, just stop */
4205 TRACE_DEVEL("leaving without reusable idle connection", H2_EV_STRM_END);
Olivier Houchard351411f2018-12-27 17:20:54 +01004206 return;
4207 }
4208 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004209 }
Christopher Fauletc5579d12020-07-01 15:45:41 +02004210 else {
4211 if (eb_is_empty(&h2c->streams_by_id)) {
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004212 /* If the connection is owned by the session, first remove it
4213 * from its list
4214 */
4215 if (h2c->conn->owner) {
4216 session_unown_conn(h2c->conn->owner, h2c->conn);
4217 h2c->conn->owner = NULL;
4218 }
4219
Olivier Houcharddc2f2752020-02-13 19:12:07 +01004220 if (!srv_add_to_idle_list(objt_server(h2c->conn->target), h2c->conn, 1)) {
Olivier Houchard2444aa52020-01-20 13:56:01 +01004221 /* The server doesn't want it, let's kill the connection right away */
4222 h2c->conn->mux->destroy(h2c);
4223 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4224 return;
4225 }
Olivier Houchard199d4fa2020-03-22 23:25:51 +01004226 /* At this point, the connection has been added to the
4227 * server idle list, so another thread may already have
4228 * hijacked it, so we can't do anything with it.
4229 */
Olivier Houchard2444aa52020-01-20 13:56:01 +01004230 TRACE_DEVEL("reusable idle connection", H2_EV_STRM_END);
4231 return;
Olivier Houchard8a786902018-12-15 16:05:40 +01004232
Olivier Houchard8a786902018-12-15 16:05:40 +01004233 }
Christopher Fauletc5579d12020-07-01 15:45:41 +02004234 else if (MT_LIST_ISEMPTY(&h2c->conn->list) &&
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004235 h2_avail_streams(h2c->conn) > 0 && objt_server(h2c->conn->target) &&
4236 !LIST_ADDED(&h2c->conn->session_list)) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004237 LIST_ADD(&__objt_server(h2c->conn->target)->available_conns[tid], mt_list_to_list(&h2c->conn->list));
4238 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004239 }
4240 }
4241 }
4242
Willy Tarreaue323f342018-03-28 13:51:45 +02004243 /* We don't want to close right now unless we're removing the
4244 * last stream, and either the connection is in error, or it
4245 * reached the ID already specified in a GOAWAY frame received
4246 * or sent (as seen by last_sid >= 0).
4247 */
Olivier Houchard7a977432019-03-21 15:47:13 +01004248 if (h2c_is_dead(h2c)) {
Willy Tarreaue323f342018-03-28 13:51:45 +02004249 /* no more stream will come, kill it now */
Willy Tarreau7838a792019-08-12 18:42:03 +02004250 TRACE_DEVEL("leaving and killing dead connection", H2_EV_STRM_END, h2c->conn);
Christopher Faulet73c12072019-04-08 11:23:22 +02004251 h2_release(h2c);
Willy Tarreaue323f342018-03-28 13:51:45 +02004252 }
4253 else if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02004254 if (h2c_may_expire(h2c))
4255 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
4256 else
4257 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02004258 task_queue(h2c->task);
Willy Tarreau7838a792019-08-12 18:42:03 +02004259 TRACE_DEVEL("leaving, refreshing connection's timeout", H2_EV_STRM_END, h2c->conn);
Willy Tarreau60935142017-10-16 18:11:19 +02004260 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004261 else
4262 TRACE_DEVEL("leaving", H2_EV_STRM_END, h2c->conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02004263}
4264
Willy Tarreau88bdba32019-05-13 18:17:53 +02004265/* Performs a synchronous or asynchronous shutr(). */
4266static void h2_do_shutr(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004267{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004268 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004269
Willy Tarreauf983d002019-05-14 10:40:21 +02004270 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004271 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004272
Willy Tarreau7838a792019-08-12 18:42:03 +02004273 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4274
Willy Tarreau18059042019-01-31 19:12:48 +01004275 /* a connstream may require us to immediately kill the whole connection
4276 * for example because of a "tcp-request content reject" rule that is
4277 * normally used to limit abuse. In this case we schedule a goaway to
4278 * close the connection.
Willy Tarreau926fa4c2017-11-07 14:42:12 +01004279 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004280 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004281 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004282 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004283 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4284 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4285 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004286 else if (!(h2s->flags & H2_SF_HEADERS_SENT)) {
4287 /* Nothing was never sent for this stream, so reset with
4288 * REFUSED_STREAM error to let the client retry the
4289 * request.
4290 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004291 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004292 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4293 }
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004294 else {
4295 /* a final response was already provided, we don't want this
4296 * stream anymore. This may happen when the server responds
4297 * before the end of an upload and closes quickly (redirect,
4298 * deny, ...)
4299 */
4300 h2s_error(h2s, H2_ERR_CANCEL);
4301 }
Willy Tarreau18059042019-01-31 19:12:48 +01004302
Willy Tarreau90c32322017-11-24 08:00:30 +01004303 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004304 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004305 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004306
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004307 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004308 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau00dd0782018-03-01 16:31:34 +01004309 h2s_close(h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004310 done:
4311 h2s->flags &= ~H2_SF_WANT_SHUTR;
Willy Tarreau7838a792019-08-12 18:42:03 +02004312 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004313 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004314add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004315 /* Let the handler know we want to shutr, and add ourselves to the
4316 * most relevant list if not yet done. h2_deferred_shut() will be
4317 * automatically called via the shut_tl tasklet when there's room
4318 * again.
4319 */
4320 h2s->flags |= H2_SF_WANT_SHUTR;
Willy Tarreauc234ae32019-05-13 17:56:11 +02004321 if (!LIST_ADDED(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004322 if (h2s->flags & H2_SF_BLK_MFCTL)
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004323 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004324 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004325 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004326 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004327 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004328 return;
Willy Tarreau62f52692017-10-08 23:01:42 +02004329}
4330
Willy Tarreau88bdba32019-05-13 18:17:53 +02004331/* Performs a synchronous or asynchronous shutw(). */
4332static void h2_do_shutw(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004333{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004334 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004335
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004336 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004337 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004338
Willy Tarreau7838a792019-08-12 18:42:03 +02004339 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4340
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004341 if (h2s->st != H2_SS_ERROR && (h2s->flags & H2_SF_HEADERS_SENT)) {
Willy Tarreau58e32082017-11-07 14:41:09 +01004342 /* we can cleanly close using an empty data frame only after headers */
4343
4344 if (!(h2s->flags & (H2_SF_ES_SENT|H2_SF_RST_SENT)) &&
4345 h2_send_empty_data_es(h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004346 goto add_to_list;
Willy Tarreau58e32082017-11-07 14:41:09 +01004347
4348 if (h2s->st == H2_SS_HREM)
Willy Tarreau00dd0782018-03-01 16:31:34 +01004349 h2s_close(h2s);
Willy Tarreau58e32082017-11-07 14:41:09 +01004350 else
4351 h2s->st = H2_SS_HLOC;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004352 } else {
Willy Tarreau18059042019-01-31 19:12:48 +01004353 /* a connstream may require us to immediately kill the whole connection
4354 * for example because of a "tcp-request content reject" rule that is
4355 * normally used to limit abuse. In this case we schedule a goaway to
4356 * close the connection.
Willy Tarreaua1349f02017-10-31 07:41:55 +01004357 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004358 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004359 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004360 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004361 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4362 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4363 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004364 else {
4365 /* Nothing was never sent for this stream, so reset with
4366 * REFUSED_STREAM error to let the client retry the
4367 * request.
4368 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004369 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004370 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4371 }
Willy Tarreau18059042019-01-31 19:12:48 +01004372
Willy Tarreau90c32322017-11-24 08:00:30 +01004373 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004374 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004375 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004376
Willy Tarreau00dd0782018-03-01 16:31:34 +01004377 h2s_close(h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004378 }
4379
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004380 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004381 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau7838a792019-08-12 18:42:03 +02004382
4383 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
4384
Willy Tarreau88bdba32019-05-13 18:17:53 +02004385 done:
4386 h2s->flags &= ~H2_SF_WANT_SHUTW;
4387 return;
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004388
4389 add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004390 /* Let the handler know we want to shutw, and add ourselves to the
4391 * most relevant list if not yet done. h2_deferred_shut() will be
4392 * automatically called via the shut_tl tasklet when there's room
4393 * again.
4394 */
4395 h2s->flags |= H2_SF_WANT_SHUTW;
Willy Tarreauc234ae32019-05-13 17:56:11 +02004396 if (!LIST_ADDED(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004397 if (h2s->flags & H2_SF_BLK_MFCTL)
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004398 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004399 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004400 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004401 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004402 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004403 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004404}
4405
Willy Tarreau5723f292020-01-10 15:16:57 +01004406/* This is the tasklet referenced in h2s->shut_tl, it is used for
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004407 * deferred shutdowns when the h2_detach() was done but the mux buffer was full
4408 * and prevented the last frame from being emitted.
4409 */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004410static struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned short state)
4411{
4412 struct h2s *h2s = ctx;
Willy Tarreau88bdba32019-05-13 18:17:53 +02004413 struct h2c *h2c = h2s->h2c;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004414
Willy Tarreau7838a792019-08-12 18:42:03 +02004415 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4416
Willy Tarreau5723f292020-01-10 15:16:57 +01004417 if (h2s->flags & H2_SF_NOTIFIED) {
4418 /* some data processing remains to be done first */
4419 goto end;
4420 }
4421
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004422 if (h2s->flags & H2_SF_WANT_SHUTW)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004423 h2_do_shutw(h2s);
4424
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004425 if (h2s->flags & H2_SF_WANT_SHUTR)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004426 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004427
Willy Tarreau88bdba32019-05-13 18:17:53 +02004428 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004429 /* We're done trying to send, remove ourself from the send_list */
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004430 LIST_DEL_INIT(&h2s->list);
Olivier Houchard7a977432019-03-21 15:47:13 +01004431
Willy Tarreau88bdba32019-05-13 18:17:53 +02004432 if (!h2s->cs) {
4433 h2s_destroy(h2s);
4434 if (h2c_is_dead(h2c))
4435 h2_release(h2c);
4436 }
Olivier Houchard7a977432019-03-21 15:47:13 +01004437 }
Willy Tarreau5723f292020-01-10 15:16:57 +01004438 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02004439 TRACE_LEAVE(H2_EV_STRM_SHUT);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004440 return NULL;
Willy Tarreau62f52692017-10-08 23:01:42 +02004441}
4442
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004443/* shutr() called by the conn_stream (mux_ops.shutr) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004444static void h2_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
4445{
4446 struct h2s *h2s = cs->ctx;
4447
Willy Tarreau7838a792019-08-12 18:42:03 +02004448 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004449 if (cs->flags & CS_FL_KILL_CONN)
4450 h2s->flags |= H2_SF_KILL_CONN;
4451
Willy Tarreau7838a792019-08-12 18:42:03 +02004452 if (mode)
4453 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004454
Willy Tarreau7838a792019-08-12 18:42:03 +02004455 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004456}
4457
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004458/* shutw() called by the conn_stream (mux_ops.shutw) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004459static void h2_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
4460{
4461 struct h2s *h2s = cs->ctx;
4462
Willy Tarreau7838a792019-08-12 18:42:03 +02004463 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004464 if (cs->flags & CS_FL_KILL_CONN)
4465 h2s->flags |= H2_SF_KILL_CONN;
4466
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004467 h2_do_shutw(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02004468 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004469}
4470
Christopher Faulet9b79a102019-07-15 11:22:56 +02004471/* Decode the payload of a HEADERS frame and produce the HTX request or response
4472 * depending on the connection's side. Returns a positive value on success, a
4473 * negative value on failure, or 0 if it couldn't proceed. May report connection
4474 * errors in h2c->errcode if the frame is non-decodable and the connection
4475 * unrecoverable. In absence of connection error when a failure is reported, the
4476 * caller must assume a stream error.
Willy Tarreauea18f862018-12-22 20:19:26 +01004477 *
4478 * The function may fold CONTINUATION frames into the initial HEADERS frame
4479 * by removing padding and next frame header, then moving the CONTINUATION
4480 * frame's payload and adjusting h2c->dfl to match the new aggregated frame,
4481 * leaving a hole between the main frame and the beginning of the next one.
4482 * The possibly remaining incomplete or next frame at the end may be moved
4483 * if the aggregated frame is not deleted, in order to fill the hole. Wrapped
4484 * HEADERS frames are unwrapped into a temporary buffer before decoding.
4485 *
4486 * A buffer at the beginning of processing may look like this :
4487 *
4488 * ,---.---------.-----.--------------.--------------.------.---.
4489 * |///| HEADERS | PAD | CONTINUATION | CONTINUATION | DATA |///|
4490 * `---^---------^-----^--------------^--------------^------^---'
4491 * | | <-----> | |
4492 * area | dpl | wrap
4493 * |<--------------> |
4494 * | dfl |
4495 * |<-------------------------------------------------->|
4496 * head data
4497 *
4498 * Padding is automatically overwritten when folding, participating to the
4499 * hole size after dfl :
4500 *
4501 * ,---.------------------------.-----.--------------.------.---.
4502 * |///| HEADERS : CONTINUATION |/////| CONTINUATION | DATA |///|
4503 * `---^------------------------^-----^--------------^------^---'
4504 * | | <-----> | |
4505 * area | hole | wrap
4506 * |<-----------------------> |
4507 * | dfl |
4508 * |<-------------------------------------------------->|
4509 * head data
4510 *
4511 * Please note that the HEADERS frame is always deprived from its PADLEN byte
4512 * however it may start with the 5 stream-dep+weight bytes in case of PRIORITY
4513 * bit.
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004514 *
4515 * The <flags> field must point to either the stream's flags or to a copy of it
4516 * so that the function can update the following flags :
4517 * - H2_SF_DATA_CLEN when content-length is seen
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004518 * - H2_SF_HEADERS_RCVD once the frame is successfully decoded
Willy Tarreau88d138e2019-01-02 19:38:14 +01004519 *
4520 * The H2_SF_HEADERS_RCVD flag is also looked at in the <flags> field prior to
4521 * decoding, in order to detect if we're dealing with a headers or a trailers
4522 * block (the trailers block appears after H2_SF_HEADERS_RCVD was seen).
Willy Tarreau13278b42017-10-13 19:23:14 +02004523 */
Willy Tarreau4790f7c2019-01-24 11:33:02 +01004524static int h2c_decode_headers(struct h2c *h2c, struct buffer *rxbuf, uint32_t *flags, unsigned long long *body_len)
Willy Tarreau13278b42017-10-13 19:23:14 +02004525{
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004526 const uint8_t *hdrs = (uint8_t *)b_head(&h2c->dbuf);
Willy Tarreau83061a82018-07-13 11:56:34 +02004527 struct buffer *tmp = get_trash_chunk();
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004528 struct http_hdr list[global.tune.max_http_hdr * 2];
Willy Tarreau83061a82018-07-13 11:56:34 +02004529 struct buffer *copy = NULL;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004530 unsigned int msgf;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004531 struct htx *htx = NULL;
Willy Tarreauea18f862018-12-22 20:19:26 +01004532 int flen; // header frame len
4533 int hole = 0;
Willy Tarreau86277d42019-01-02 15:36:11 +01004534 int ret = 0;
4535 int outlen;
Willy Tarreau13278b42017-10-13 19:23:14 +02004536 int wrap;
Willy Tarreau13278b42017-10-13 19:23:14 +02004537
Willy Tarreau7838a792019-08-12 18:42:03 +02004538 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
4539
Willy Tarreauea18f862018-12-22 20:19:26 +01004540next_frame:
4541 if (b_data(&h2c->dbuf) - hole < h2c->dfl)
4542 goto leave; // incomplete input frame
4543
4544 /* No END_HEADERS means there's one or more CONTINUATION frames. In
4545 * this case, we'll try to paste it immediately after the initial
4546 * HEADERS frame payload and kill any possible padding. The initial
4547 * frame's length will be increased to represent the concatenation
4548 * of the two frames. The next frame is read from position <tlen>
4549 * and written at position <flen> (minus padding if some is present).
4550 */
4551 if (unlikely(!(h2c->dff & H2_F_HEADERS_END_HEADERS))) {
4552 struct h2_fh hdr;
4553 int clen; // CONTINUATION frame's payload length
4554
Willy Tarreau7838a792019-08-12 18:42:03 +02004555 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 +01004556 if (!h2_peek_frame_hdr(&h2c->dbuf, h2c->dfl + hole, &hdr)) {
4557 /* no more data, the buffer may be full, either due to
4558 * too large a frame or because of too large a hole that
4559 * we're going to compact at the end.
4560 */
4561 goto leave;
4562 }
4563
4564 if (hdr.ft != H2_FT_CONTINUATION) {
4565 /* RFC7540#6.10: frame of unexpected type */
Willy Tarreau7838a792019-08-12 18:42:03 +02004566 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 +01004567 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreaua3075282020-12-01 10:22:43 +01004568 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreauea18f862018-12-22 20:19:26 +01004569 goto fail;
4570 }
4571
4572 if (hdr.sid != h2c->dsi) {
4573 /* RFC7540#6.10: frame of different stream */
Willy Tarreau7838a792019-08-12 18:42:03 +02004574 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 +01004575 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreaua3075282020-12-01 10:22:43 +01004576 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreauea18f862018-12-22 20:19:26 +01004577 goto fail;
4578 }
4579
4580 if ((unsigned)hdr.len > (unsigned)global.tune.bufsize) {
4581 /* RFC7540#4.2: invalid frame length */
Willy Tarreau7838a792019-08-12 18:42:03 +02004582 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 +01004583 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4584 goto fail;
4585 }
4586
4587 /* detect when we must stop aggragating frames */
4588 h2c->dff |= hdr.ff & H2_F_HEADERS_END_HEADERS;
4589
4590 /* Take as much as we can of the CONTINUATION frame's payload */
4591 clen = b_data(&h2c->dbuf) - (h2c->dfl + hole + 9);
4592 if (clen > hdr.len)
4593 clen = hdr.len;
4594
4595 /* Move the frame's payload over the padding, hole and frame
4596 * header. At least one of hole or dpl is null (see diagrams
4597 * above). The hole moves after the new aggragated frame.
4598 */
4599 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole + 9), clen, -(h2c->dpl + hole + 9));
4600 h2c->dfl += clen - h2c->dpl;
4601 hole += h2c->dpl + 9;
4602 h2c->dpl = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004603 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 +01004604 goto next_frame;
4605 }
4606
4607 flen = h2c->dfl - h2c->dpl;
Willy Tarreau68472622017-12-11 18:36:37 +01004608
Willy Tarreau13278b42017-10-13 19:23:14 +02004609 /* if the input buffer wraps, take a temporary copy of it (rare) */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004610 wrap = b_wrap(&h2c->dbuf) - b_head(&h2c->dbuf);
Willy Tarreau13278b42017-10-13 19:23:14 +02004611 if (wrap < h2c->dfl) {
Willy Tarreau68dd9852017-07-03 14:44:26 +02004612 copy = alloc_trash_chunk();
4613 if (!copy) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004614 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 +02004615 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
4616 goto fail;
4617 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004618 memcpy(copy->area, b_head(&h2c->dbuf), wrap);
4619 memcpy(copy->area + wrap, b_orig(&h2c->dbuf), h2c->dfl - wrap);
4620 hdrs = (uint8_t *) copy->area;
Willy Tarreau13278b42017-10-13 19:23:14 +02004621 }
4622
Willy Tarreau13278b42017-10-13 19:23:14 +02004623 /* Skip StreamDep and weight for now (we don't support PRIORITY) */
4624 if (h2c->dff & H2_F_HEADERS_PRIORITY) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004625 if (read_n32(hdrs) == h2c->dsi) {
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004626 /* RFC7540#5.3.1 : stream dep may not depend on itself */
Willy Tarreau7838a792019-08-12 18:42:03 +02004627 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 +01004628 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreaua3075282020-12-01 10:22:43 +01004629 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreaua0d11b62018-09-05 18:30:05 +02004630 goto fail;
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004631 }
4632
Willy Tarreaua01f45e2018-12-31 07:41:24 +01004633 if (flen < 5) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004634 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 +01004635 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4636 goto fail;
4637 }
4638
Willy Tarreau13278b42017-10-13 19:23:14 +02004639 hdrs += 5; // stream dep = 4, weight = 1
4640 flen -= 5;
4641 }
4642
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004643 if (!h2_get_buf(h2c, rxbuf)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004644 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 +01004645 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau86277d42019-01-02 15:36:11 +01004646 goto leave;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004647 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004648
Willy Tarreau937f7602018-02-26 15:22:17 +01004649 /* we can't retry a failed decompression operation so we must be very
4650 * careful not to take any risks. In practice the output buffer is
4651 * always empty except maybe for trailers, in which case we simply have
4652 * to wait for the upper layer to finish consuming what is available.
4653 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004654 htx = htx_from_buf(rxbuf);
4655 if (!htx_is_empty(htx)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004656 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 +02004657 h2c->flags |= H2_CF_DEM_SFULL;
4658 goto leave;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004659 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004660
Willy Tarreau25919232019-01-03 14:48:18 +01004661 /* past this point we cannot roll back in case of error */
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004662 outlen = hpack_decode_frame(h2c->ddht, hdrs, flen, list,
4663 sizeof(list)/sizeof(list[0]), tmp);
4664 if (outlen < 0) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004665 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 +01004666 h2c_error(h2c, H2_ERR_COMPRESSION_ERROR);
4667 goto fail;
4668 }
4669
Willy Tarreau25919232019-01-03 14:48:18 +01004670 /* The PACK decompressor was updated, let's update the input buffer and
4671 * the parser's state to commit these changes and allow us to later
4672 * fail solely on the stream if needed.
4673 */
4674 b_del(&h2c->dbuf, h2c->dfl + hole);
4675 h2c->dfl = hole = 0;
4676 h2c->st0 = H2_CS_FRAME_H;
4677
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004678 /* OK now we have our header list in <list> */
Willy Tarreau880f5802019-01-03 08:10:14 +01004679 msgf = (h2c->dff & H2_F_HEADERS_END_STREAM) ? 0 : H2_MSGF_BODY;
Christopher Fauletd0db4232021-01-22 11:46:30 +01004680 msgf |= (*flags & H2_SF_BODY_TUNNEL) ? H2_MSGF_BODY_TUNNEL: 0;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004681
Willy Tarreau88d138e2019-01-02 19:38:14 +01004682 if (*flags & H2_SF_HEADERS_RCVD)
4683 goto trailers;
4684
4685 /* This is the first HEADERS frame so it's a headers block */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004686 if (h2c->flags & H2_CF_IS_BACK)
4687 outlen = h2_make_htx_response(list, htx, &msgf, body_len);
4688 else
4689 outlen = h2_make_htx_request(list, htx, &msgf, body_len);
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004690
4691 if (outlen < 0) {
Willy Tarreau25919232019-01-03 14:48:18 +01004692 /* too large headers? this is a stream error only */
Willy Tarreau7838a792019-08-12 18:42:03 +02004693 TRACE_STATE("request headers too large", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2S_ERR|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004694 goto fail;
4695 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004696
Willy Tarreau174b06a2018-04-25 18:13:58 +02004697 if (msgf & H2_MSGF_BODY) {
4698 /* a payload is present */
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004699 if (msgf & H2_MSGF_BODY_CL) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004700 *flags |= H2_SF_DATA_CLEN;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004701 htx->extra = *body_len;
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004702 }
Willy Tarreau174b06a2018-04-25 18:13:58 +02004703 }
4704
Christopher Fauletd0db4232021-01-22 11:46:30 +01004705 if (msgf & H2_MSGF_BODY_TUNNEL)
4706 *flags |= H2_SF_BODY_TUNNEL;
4707 else {
4708 /* Abort the tunnel attempt, if any */
4709 if (*flags & H2_SF_BODY_TUNNEL)
4710 *flags |= H2_SF_TUNNEL_ABRT;
4711 *flags &= ~H2_SF_BODY_TUNNEL;
4712 }
4713
Willy Tarreau88d138e2019-01-02 19:38:14 +01004714 done:
Christopher Faulet0b465482019-02-19 15:14:23 +01004715 /* indicate that a HEADERS frame was received for this stream, except
4716 * for 1xx responses. For 1xx responses, another HEADERS frame is
4717 * expected.
4718 */
4719 if (!(msgf & H2_MSGF_RSP_1XX))
4720 *flags |= H2_SF_HEADERS_RCVD;
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004721
Christopher Fauletb75b5ea2019-05-17 08:37:28 +02004722 if ((h2c->dff & H2_F_HEADERS_END_STREAM)) {
Christopher Faulet9b79a102019-07-15 11:22:56 +02004723 /* Mark the end of message using EOM */
Christopher Faulet810df062020-07-22 16:20:34 +02004724 htx->flags |= HTX_FL_EOI; /* no more data are expected. Only EOM remains to add now */
Willy Tarreau7838a792019-08-12 18:42:03 +02004725 if (!htx_add_endof(htx, HTX_BLK_EOM)) {
4726 TRACE_STATE("failed to append HTX EOM block into rxbuf", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2S_ERR, h2c->conn);
Christopher Faulet9b79a102019-07-15 11:22:56 +02004727 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004728 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01004729 }
Willy Tarreau937f7602018-02-26 15:22:17 +01004730
Willy Tarreau86277d42019-01-02 15:36:11 +01004731 /* success */
4732 ret = 1;
4733
Willy Tarreau68dd9852017-07-03 14:44:26 +02004734 leave:
Willy Tarreau86277d42019-01-02 15:36:11 +01004735 /* If there is a hole left and it's not at the end, we are forced to
Willy Tarreauea18f862018-12-22 20:19:26 +01004736 * move the remaining data over it.
4737 */
4738 if (hole) {
4739 if (b_data(&h2c->dbuf) > h2c->dfl + hole)
4740 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole),
4741 b_data(&h2c->dbuf) - (h2c->dfl + hole), -hole);
4742 b_sub(&h2c->dbuf, hole);
4743 }
4744
Willy Tarreau97215ca2019-04-29 10:20:21 +02004745 if (b_full(&h2c->dbuf) && h2c->dfl >= b_data(&h2c->dbuf)) {
Willy Tarreauea18f862018-12-22 20:19:26 +01004746 /* too large frames */
4747 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau86277d42019-01-02 15:36:11 +01004748 ret = -1;
Willy Tarreauea18f862018-12-22 20:19:26 +01004749 }
4750
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004751 if (htx)
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004752 htx_to_buf(htx, rxbuf);
Willy Tarreau68dd9852017-07-03 14:44:26 +02004753 free_trash_chunk(copy);
Willy Tarreau7838a792019-08-12 18:42:03 +02004754 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau86277d42019-01-02 15:36:11 +01004755 return ret;
4756
Willy Tarreau68dd9852017-07-03 14:44:26 +02004757 fail:
Willy Tarreau86277d42019-01-02 15:36:11 +01004758 ret = -1;
Willy Tarreau68dd9852017-07-03 14:44:26 +02004759 goto leave;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004760
4761 trailers:
4762 /* This is the last HEADERS frame hence a trailer */
Willy Tarreau88d138e2019-01-02 19:38:14 +01004763 if (!(h2c->dff & H2_F_HEADERS_END_STREAM)) {
4764 /* It's a trailer but it's missing ES flag */
Willy Tarreau7838a792019-08-12 18:42:03 +02004765 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 +01004766 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreaua3075282020-12-01 10:22:43 +01004767 HA_ATOMIC_ADD(&h2c->px_counters->conn_proto_err, 1);
Willy Tarreau88d138e2019-01-02 19:38:14 +01004768 goto fail;
4769 }
4770
Christopher Faulet9b79a102019-07-15 11:22:56 +02004771 /* Trailers terminate a DATA sequence */
Willy Tarreau7838a792019-08-12 18:42:03 +02004772 if (h2_make_htx_trailers(list, htx) <= 0) {
4773 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 +02004774 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004775 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01004776 goto done;
Willy Tarreau13278b42017-10-13 19:23:14 +02004777}
4778
Christopher Faulet9b79a102019-07-15 11:22:56 +02004779/* Transfer the payload of a DATA frame to the HTTP/1 side. The HTTP/2 frame
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004780 * parser state is automatically updated. Returns > 0 if it could completely
4781 * send the current frame, 0 if it couldn't complete, in which case
4782 * CS_FL_RCV_MORE must be checked to know if some data remain pending (an empty
4783 * DATA frame can return 0 as a valid result). Stream errors are reported in
4784 * h2s->errcode and connection errors in h2c->errcode. The caller must already
4785 * have checked the frame header and ensured that the frame was complete or the
4786 * buffer full. It changes the frame state to FRAME_A once done.
Willy Tarreau454f9052017-10-26 19:40:35 +02004787 */
Willy Tarreau454b57b2018-02-26 15:50:05 +01004788static int h2_frt_transfer_data(struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02004789{
4790 struct h2c *h2c = h2s->h2c;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004791 int block;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004792 unsigned int flen = 0;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004793 struct htx *htx = NULL;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004794 struct buffer *csbuf;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004795 unsigned int sent;
Willy Tarreau454f9052017-10-26 19:40:35 +02004796
Willy Tarreau7838a792019-08-12 18:42:03 +02004797 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
4798
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004799 h2c->flags &= ~H2_CF_DEM_SFULL;
Willy Tarreau454f9052017-10-26 19:40:35 +02004800
Olivier Houchard638b7992018-08-16 15:41:52 +02004801 csbuf = h2_get_buf(h2c, &h2s->rxbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004802 if (!csbuf) {
4803 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02004804 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 +01004805 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004806 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004807 htx = htx_from_buf(csbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004808
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004809try_again:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004810 flen = h2c->dfl - h2c->dpl;
4811 if (!flen)
Willy Tarreau4a28da12018-01-04 14:41:00 +01004812 goto end_transfer;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004813
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004814 if (flen > b_data(&h2c->dbuf)) {
4815 flen = b_data(&h2c->dbuf);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004816 if (!flen)
Willy Tarreau454b57b2018-02-26 15:50:05 +01004817 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004818 }
4819
Christopher Faulet9b79a102019-07-15 11:22:56 +02004820 block = htx_free_data_space(htx);
4821 if (!block) {
4822 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004823 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 +02004824 goto fail;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004825 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004826 if (flen > block)
4827 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004828
Christopher Faulet9b79a102019-07-15 11:22:56 +02004829 /* here, flen is the max we can copy into the output buffer */
4830 block = b_contig_data(&h2c->dbuf, 0);
4831 if (flen > block)
4832 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004833
Christopher Faulet9b79a102019-07-15 11:22:56 +02004834 sent = htx_add_data(htx, ist2(b_head(&h2c->dbuf), flen));
Willy Tarreau022e5e52020-09-10 09:33:15 +02004835 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 +02004836
Christopher Faulet9b79a102019-07-15 11:22:56 +02004837 b_del(&h2c->dbuf, sent);
4838 h2c->dfl -= sent;
4839 h2c->rcvd_c += sent;
4840 h2c->rcvd_s += sent; // warning, this can also affect the closed streams!
Willy Tarreau454f9052017-10-26 19:40:35 +02004841
Christopher Faulet9b79a102019-07-15 11:22:56 +02004842 if (h2s->flags & H2_SF_DATA_CLEN) {
4843 h2s->body_len -= sent;
4844 htx->extra = h2s->body_len;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004845 }
4846
Christopher Faulet9b79a102019-07-15 11:22:56 +02004847 if (sent < flen) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01004848 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004849 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 +01004850 goto fail;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004851 }
4852
Christopher Faulet9b79a102019-07-15 11:22:56 +02004853 goto try_again;
4854
Willy Tarreau4a28da12018-01-04 14:41:00 +01004855 end_transfer:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004856 /* here we're done with the frame, all the payload (except padding) was
4857 * transferred.
4858 */
Willy Tarreaueba10f22018-04-25 20:44:22 +02004859
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004860 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Faulet810df062020-07-22 16:20:34 +02004861 htx->flags |= HTX_FL_EOI; /* no more data are expected. Only EOM remains to add now */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004862 if (!htx_add_endof(htx, HTX_BLK_EOM)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004863 TRACE_STATE("h2s rxbuf is full, failed to add EOM", H2_EV_RX_FRAME|H2_EV_RX_DATA|H2_EV_H2S_BLK, h2c->conn, h2s);
Christopher Faulet9b79a102019-07-15 11:22:56 +02004864 h2c->flags |= H2_CF_DEM_SFULL;
4865 goto fail;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004866 }
Willy Tarreaueba10f22018-04-25 20:44:22 +02004867 }
4868
Willy Tarreaud1023bb2018-03-22 16:53:12 +01004869 h2c->rcvd_c += h2c->dpl;
4870 h2c->rcvd_s += h2c->dpl;
4871 h2c->dpl = 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02004872 h2c->st0 = H2_CS_FRAME_A; // send the corresponding window update
Christopher Faulet9b79a102019-07-15 11:22:56 +02004873 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02004874 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004875 return 1;
Willy Tarreau454b57b2018-02-26 15:50:05 +01004876 fail:
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004877 if (htx)
4878 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02004879 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454b57b2018-02-26 15:50:05 +01004880 return 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02004881}
4882
Willy Tarreau115e83b2018-12-01 19:17:53 +01004883/* Try to send a HEADERS frame matching HTX response present in HTX message
4884 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
4885 * must check the stream's status to detect any error which might have happened
4886 * subsequently to a successful send. The htx blocks are automatically removed
4887 * from the message. The htx message is assumed to be valid since produced from
4888 * the internal code, hence it contains a start line, an optional series of
4889 * header blocks and an end of header, otherwise an invalid frame could be
4890 * emitted and the resulting htx message could be left in an inconsistent state.
4891 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004892static size_t h2s_frt_make_resp_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau115e83b2018-12-01 19:17:53 +01004893{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004894 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau115e83b2018-12-01 19:17:53 +01004895 struct h2c *h2c = h2s->h2c;
4896 struct htx_blk *blk;
4897 struct htx_blk *blk_end;
4898 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02004899 struct buffer *mbuf;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004900 struct htx_sl *sl;
4901 enum htx_blk_type type;
4902 int es_now = 0;
4903 int ret = 0;
4904 int hdr;
4905 int idx;
4906
Willy Tarreau7838a792019-08-12 18:42:03 +02004907 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
4908
Willy Tarreau115e83b2018-12-01 19:17:53 +01004909 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004910 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004911 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02004912 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004913 return 0;
4914 }
4915
Willy Tarreau115e83b2018-12-01 19:17:53 +01004916 /* determine the first block which must not be deleted, blk_end may
4917 * be NULL if all blocks have to be deleted.
4918 */
4919 idx = htx_get_head(htx);
4920 blk_end = NULL;
4921 while (idx != -1) {
4922 type = htx_get_blk_type(htx_get_blk(htx, idx));
4923 idx = htx_get_next(htx, idx);
4924 if (type == HTX_BLK_EOH) {
4925 if (idx != -1)
4926 blk_end = htx_get_blk(htx, idx);
4927 break;
4928 }
4929 }
4930
4931 /* get the start line, we do have one */
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004932 blk = htx_get_head_blk(htx);
Christopher Fauletea009732019-11-18 15:50:25 +01004933 BUG_ON(!blk || htx_get_blk_type(blk) != HTX_BLK_RES_SL);
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004934 ALREADY_CHECKED(blk);
4935 sl = htx_get_blk_ptr(htx, blk);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004936 h2s->status = sl->info.res.status;
Willy Tarreau7838a792019-08-12 18:42:03 +02004937 if (h2s->status < 100 || h2s->status > 999) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01004938 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreauaafdf582018-12-10 18:06:40 +01004939 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004940 }
Christopher Faulet89899422020-12-07 18:24:43 +01004941 else if (h2s->status == 101) {
4942 /* 101 responses are not supported in H2, so return a error (RFC7540#8.1.1) */
4943 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
4944 goto fail;
4945 }
Christopher Fauletd0db4232021-01-22 11:46:30 +01004946 else if ((h2s->flags & H2_SF_BODY_TUNNEL) && h2s->status >= 300) {
4947 /* Abort the tunnel attempt */
4948 h2s->flags &= ~H2_SF_BODY_TUNNEL;
4949 h2s->flags |= H2_SF_TUNNEL_ABRT;
4950 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01004951
4952 /* and the rest of the headers, that we dump starting at header 0 */
4953 hdr = 0;
4954
Willy Tarreau8e162ee2018-12-06 14:07:27 +01004955 idx = htx_get_head(htx); // returns the SL that we skip
Willy Tarreau115e83b2018-12-01 19:17:53 +01004956 while ((idx = htx_get_next(htx, idx)) != -1) {
4957 blk = htx_get_blk(htx, idx);
4958 type = htx_get_blk_type(blk);
4959
4960 if (type == HTX_BLK_UNUSED)
4961 continue;
4962
4963 if (type != HTX_BLK_HDR)
4964 break;
4965
Willy Tarreau7838a792019-08-12 18:42:03 +02004966 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01004967 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004968 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004969 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01004970
4971 list[hdr].n = htx_get_blk_name(htx, blk);
4972 list[hdr].v = htx_get_blk_value(htx, blk);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004973 hdr++;
4974 }
4975
4976 /* marker for end of headers */
4977 list[hdr].n = ist("");
4978
4979 if (h2s->status == 204 || h2s->status == 304) {
4980 /* no contents, claim c-len is present and set to zero */
4981 es_now = 1;
4982 }
4983
Willy Tarreau9c218e72019-05-26 10:08:28 +02004984 mbuf = br_tail(h2c->mbuf);
4985 retry:
4986 if (!h2_get_buf(h2c, mbuf)) {
4987 h2c->flags |= H2_CF_MUX_MALLOC;
4988 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02004989 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 +02004990 return 0;
4991 }
4992
Willy Tarreau115e83b2018-12-01 19:17:53 +01004993 chunk_reset(&outbuf);
4994
4995 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004996 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
4997 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004998 break;
4999 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005000 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau115e83b2018-12-01 19:17:53 +01005001 }
5002
5003 if (outbuf.size < 9)
5004 goto full;
5005
5006 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5007 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5008 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5009 outbuf.data = 9;
5010
5011 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01005012 if (!hpack_encode_int_status(&outbuf, h2s->status)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005013 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005014 goto realign_again;
5015 goto full;
5016 }
5017
5018 /* encode all headers, stop at empty name */
5019 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
5020 /* these ones do not exist in H2 and must be dropped. */
5021 if (isteq(list[hdr].n, ist("connection")) ||
5022 isteq(list[hdr].n, ist("proxy-connection")) ||
5023 isteq(list[hdr].n, ist("keep-alive")) ||
5024 isteq(list[hdr].n, ist("upgrade")) ||
5025 isteq(list[hdr].n, ist("transfer-encoding")))
5026 continue;
5027
Christopher Faulet86d144c2019-08-14 16:32:25 +02005028 /* Skip all pseudo-headers */
5029 if (*(list[hdr].n.ptr) == ':')
5030 continue;
5031
Willy Tarreau115e83b2018-12-01 19:17:53 +01005032 if (isteq(list[hdr].n, ist("")))
5033 break; // end
5034
5035 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
5036 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005037 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005038 goto realign_again;
5039 goto full;
5040 }
5041 }
5042
Willy Tarreaucb985a42019-10-07 16:56:34 +02005043 /* update the frame's size */
5044 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5045
5046 if (outbuf.data > h2c->mfs + 9) {
5047 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5048 /* output full */
5049 if (b_space_wraps(mbuf))
5050 goto realign_again;
5051 goto full;
5052 }
5053 }
5054
Christopher Faulet0b465482019-02-19 15:14:23 +01005055 /* we may need to add END_STREAM except for 1xx responses.
Willy Tarreau115e83b2018-12-01 19:17:53 +01005056 * FIXME: we should also set it when we know for sure that the
5057 * content-length is zero as well as on 204/304
5058 */
Christopher Faulet89899422020-12-07 18:24:43 +01005059 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM && h2s->status >= 200)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005060 es_now = 1;
5061
Willy Tarreau927b88b2019-03-04 08:03:25 +01005062 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005063 es_now = 1;
5064
Willy Tarreau115e83b2018-12-01 19:17:53 +01005065 if (es_now)
5066 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5067
5068 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02005069 TRACE_USER("sent H2 response", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
Willy Tarreaubcc45952019-05-26 10:05:50 +02005070 b_add(mbuf, outbuf.data);
Christopher Faulet0b465482019-02-19 15:14:23 +01005071
5072 /* indicates the HEADERS frame was sent, except for 1xx responses. For
5073 * 1xx responses, another HEADERS frame is expected.
5074 */
Christopher Faulet89899422020-12-07 18:24:43 +01005075 if (h2s->status >= 200)
Christopher Faulet0b465482019-02-19 15:14:23 +01005076 h2s->flags |= H2_SF_HEADERS_SENT;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005077
Willy Tarreau115e83b2018-12-01 19:17:53 +01005078 if (es_now) {
5079 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005080 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 +01005081 if (h2s->st == H2_SS_OPEN)
5082 h2s->st = H2_SS_HLOC;
5083 else
5084 h2s_close(h2s);
5085 }
5086
5087 /* OK we could properly deliver the response */
5088
5089 /* remove all header blocks including the EOH and compute the
5090 * corresponding size.
5091 *
5092 * FIXME: We should remove everything when es_now is set.
5093 */
5094 ret = 0;
5095 idx = htx_get_head(htx);
5096 blk = htx_get_blk(htx, idx);
5097 while (blk != blk_end) {
5098 ret += htx_get_blksz(blk);
5099 blk = htx_remove_blk(htx, blk);
5100 }
Willy Tarreauc5753ae2018-12-02 12:28:01 +01005101
Christopher Faulet316934d2019-05-15 14:22:48 +02005102 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
5103 ret += htx_get_blksz(blk_end);
Willy Tarreauc5753ae2018-12-02 12:28:01 +01005104 htx_remove_blk(htx, blk_end);
Christopher Faulet316934d2019-05-15 14:22:48 +02005105 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005106 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005107 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005108 return ret;
5109 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005110 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5111 goto retry;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005112 h2c->flags |= H2_CF_MUX_MFULL;
5113 h2s->flags |= H2_SF_BLK_MROOM;
5114 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005115 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 +01005116 goto end;
5117 fail:
5118 /* unparsable HTX messages, too large ones to be produced in the local
5119 * list etc go here (unrecoverable errors).
5120 */
5121 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5122 ret = 0;
5123 goto end;
5124}
5125
Willy Tarreau80739692018-10-05 11:35:57 +02005126/* Try to send a HEADERS frame matching HTX request present in HTX message
5127 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
5128 * must check the stream's status to detect any error which might have happened
5129 * subsequently to a successful send. The htx blocks are automatically removed
5130 * from the message. The htx message is assumed to be valid since produced from
5131 * the internal code, hence it contains a start line, an optional series of
5132 * header blocks and an end of header, otherwise an invalid frame could be
5133 * emitted and the resulting htx message could be left in an inconsistent state.
5134 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005135static size_t h2s_bck_make_req_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau80739692018-10-05 11:35:57 +02005136{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005137 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau80739692018-10-05 11:35:57 +02005138 struct h2c *h2c = h2s->h2c;
5139 struct htx_blk *blk;
5140 struct htx_blk *blk_end;
5141 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005142 struct buffer *mbuf;
Willy Tarreau80739692018-10-05 11:35:57 +02005143 struct htx_sl *sl;
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005144 struct ist meth, uri, auth;
Willy Tarreau80739692018-10-05 11:35:57 +02005145 enum htx_blk_type type;
5146 int es_now = 0;
5147 int ret = 0;
5148 int hdr;
5149 int idx;
5150
Willy Tarreau7838a792019-08-12 18:42:03 +02005151 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5152
Willy Tarreau80739692018-10-05 11:35:57 +02005153 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 Tarreau80739692018-10-05 11:35:57 +02005155 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 Tarreau80739692018-10-05 11:35:57 +02005157 return 0;
5158 }
5159
Willy Tarreau80739692018-10-05 11:35:57 +02005160 /* determine the first block which must not be deleted, blk_end may
5161 * be NULL if all blocks have to be deleted.
5162 */
5163 idx = htx_get_head(htx);
5164 blk_end = NULL;
5165 while (idx != -1) {
5166 type = htx_get_blk_type(htx_get_blk(htx, idx));
5167 idx = htx_get_next(htx, idx);
5168 if (type == HTX_BLK_EOH) {
5169 if (idx != -1)
5170 blk_end = htx_get_blk(htx, idx);
5171 break;
5172 }
5173 }
5174
5175 /* get the start line, we do have one */
Christopher Fauletb77a1d22019-05-13 11:55:10 +02005176 blk = htx_get_head_blk(htx);
Christopher Fauletea009732019-11-18 15:50:25 +01005177 BUG_ON(!blk || htx_get_blk_type(blk) != HTX_BLK_REQ_SL);
Christopher Fauletb77a1d22019-05-13 11:55:10 +02005178 ALREADY_CHECKED(blk);
5179 sl = htx_get_blk_ptr(htx, blk);
Willy Tarreau80739692018-10-05 11:35:57 +02005180 meth = htx_sl_req_meth(sl);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005181 uri = htx_sl_req_uri(sl);
5182 if (unlikely(uri.len == 0)) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01005183 TRACE_ERROR("no URI in HTX request", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005184 goto fail;
5185 }
Willy Tarreau80739692018-10-05 11:35:57 +02005186
5187 /* and the rest of the headers, that we dump starting at header 0 */
5188 hdr = 0;
5189
Willy Tarreau8e162ee2018-12-06 14:07:27 +01005190 idx = htx_get_head(htx); // returns the SL that we skip
Willy Tarreau80739692018-10-05 11:35:57 +02005191 while ((idx = htx_get_next(htx, idx)) != -1) {
5192 blk = htx_get_blk(htx, idx);
5193 type = htx_get_blk_type(blk);
5194
5195 if (type == HTX_BLK_UNUSED)
5196 continue;
5197
5198 if (type != HTX_BLK_HDR)
5199 break;
5200
Willy Tarreau7838a792019-08-12 18:42:03 +02005201 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01005202 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02005203 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005204 }
Willy Tarreau80739692018-10-05 11:35:57 +02005205
5206 list[hdr].n = htx_get_blk_name(htx, blk);
5207 list[hdr].v = htx_get_blk_value(htx, blk);
Christopher Faulet67d58092019-10-02 10:51:38 +02005208
5209 /* Skip header if same name is used to add the server name */
5210 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name &&
5211 isteq(list[hdr].n, ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len)))
5212 continue;
5213
Willy Tarreau80739692018-10-05 11:35:57 +02005214 hdr++;
5215 }
5216
Christopher Faulet72ba6cd2019-09-24 16:20:05 +02005217 /* Now add the server name to a header (if requested) */
5218 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name) {
5219 struct server *srv = objt_server(h2c->conn->target);
5220
5221 if (srv) {
5222 list[hdr].n = ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len);
5223 list[hdr].v = ist(srv->id);
5224 hdr++;
5225 }
5226 }
5227
Willy Tarreau80739692018-10-05 11:35:57 +02005228 /* marker for end of headers */
5229 list[hdr].n = ist("");
5230
Willy Tarreau9c218e72019-05-26 10:08:28 +02005231 mbuf = br_tail(h2c->mbuf);
5232 retry:
5233 if (!h2_get_buf(h2c, mbuf)) {
5234 h2c->flags |= H2_CF_MUX_MALLOC;
5235 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005236 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 +02005237 return 0;
5238 }
5239
Willy Tarreau80739692018-10-05 11:35:57 +02005240 chunk_reset(&outbuf);
5241
5242 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005243 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5244 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005245 break;
5246 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005247 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau80739692018-10-05 11:35:57 +02005248 }
5249
5250 if (outbuf.size < 9)
5251 goto full;
5252
5253 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5254 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5255 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5256 outbuf.data = 9;
5257
5258 /* encode the method, which necessarily is the first one */
Willy Tarreaubdabc3a2018-12-10 18:25:11 +01005259 if (!hpack_encode_method(&outbuf, sl->info.req.meth, meth)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005260 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005261 goto realign_again;
5262 goto full;
5263 }
5264
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005265 auth = ist(NULL);
5266
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005267 /* RFC7540 #8.3: the CONNECT method must have :
5268 * - :authority set to the URI part (host:port)
5269 * - :method set to CONNECT
5270 * - :scheme and :path omitted
5271 */
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005272 if (unlikely(sl->info.req.meth == HTTP_METH_CONNECT)) {
5273 auth = uri;
5274
5275 if (!hpack_encode_header(&outbuf, ist(":authority"), auth)) {
5276 /* output full */
5277 if (b_space_wraps(mbuf))
5278 goto realign_again;
5279 goto full;
5280 }
5281 } else {
5282 /* other methods need a :scheme. If an authority is known from
5283 * the request line, it must be sent, otherwise only host is
5284 * sent. Host is never sent as the authority.
5285 */
5286 struct ist scheme = { };
Christopher Faulet3b44c542019-06-14 10:46:51 +02005287
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005288 if (uri.ptr[0] != '/' && uri.ptr[0] != '*') {
5289 /* the URI seems to start with a scheme */
5290 int len = 1;
5291
5292 while (len < uri.len && uri.ptr[len] != ':')
5293 len++;
5294
5295 if (len + 2 < uri.len && uri.ptr[len + 1] == '/' && uri.ptr[len + 2] == '/') {
5296 /* make the uri start at the authority now */
5297 scheme.ptr = uri.ptr;
5298 scheme.len = len,
5299 uri.ptr += len + 3;
5300 uri.len -= len + 3;
5301
5302 /* find the auth part of the URI */
5303 auth.ptr = uri.ptr;
5304 auth.len = 0;
5305 while (auth.len < uri.len && auth.ptr[auth.len] != '/')
5306 auth.len++;
5307
5308 uri.ptr += auth.len;
5309 uri.len -= auth.len;
5310 }
5311 }
5312
5313 if (!scheme.len) {
5314 /* no explicit scheme, we're using an origin-form URI,
5315 * probably from an H1 request transcoded to H2 via an
5316 * external layer, then received as H2 without authority.
5317 * So we have to look up the scheme from the HTX flags.
5318 * In such a case only http and https are possible, and
5319 * https is the default (sent by browsers).
5320 */
5321 if ((sl->flags & (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP)) == (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP))
5322 scheme = ist("http");
5323 else
5324 scheme = ist("https");
5325 }
Christopher Faulet3b44c542019-06-14 10:46:51 +02005326
5327 if (!hpack_encode_scheme(&outbuf, scheme)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005328 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005329 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005330 goto realign_again;
5331 goto full;
5332 }
Willy Tarreau80739692018-10-05 11:35:57 +02005333
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005334 if (auth.len && !hpack_encode_header(&outbuf, ist(":authority"), auth)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005335 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005336 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005337 goto realign_again;
5338 goto full;
5339 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005340
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005341 /* encode the path. RFC7540#8.1.2.3: if path is empty it must
5342 * be sent as '/' or '*'.
5343 */
5344 if (unlikely(!uri.len)) {
5345 if (sl->info.req.meth == HTTP_METH_OPTIONS)
5346 uri = ist("*");
5347 else
5348 uri = ist("/");
Willy Tarreau053c1572019-02-01 16:13:59 +01005349 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005350
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005351 if (!hpack_encode_path(&outbuf, uri)) {
5352 /* output full */
5353 if (b_space_wraps(mbuf))
5354 goto realign_again;
5355 goto full;
5356 }
Willy Tarreau80739692018-10-05 11:35:57 +02005357 }
5358
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005359 /* encode all headers, stop at empty name. Host is only sent if we
5360 * do not provide an authority.
5361 */
Willy Tarreau80739692018-10-05 11:35:57 +02005362 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005363 struct ist n = list[hdr].n;
5364 struct ist v = list[hdr].v;
5365
Willy Tarreau80739692018-10-05 11:35:57 +02005366 /* these ones do not exist in H2 and must be dropped. */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005367 if (isteq(n, ist("connection")) ||
5368 (auth.len && isteq(n, ist("host"))) ||
5369 isteq(n, ist("proxy-connection")) ||
5370 isteq(n, ist("keep-alive")) ||
5371 isteq(n, ist("upgrade")) ||
5372 isteq(n, ist("transfer-encoding")))
Willy Tarreau80739692018-10-05 11:35:57 +02005373 continue;
5374
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005375 if (isteq(n, ist("te"))) {
5376 /* "te" may only be sent with "trailers" if this value
5377 * is present, otherwise it must be deleted.
5378 */
5379 v = istist(v, ist("trailers"));
5380 if (!v.ptr || (v.len > 8 && v.ptr[8] != ','))
5381 continue;
5382 v = ist("trailers");
5383 }
5384
Christopher Faulet86d144c2019-08-14 16:32:25 +02005385 /* Skip all pseudo-headers */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005386 if (*(n.ptr) == ':')
Christopher Faulet86d144c2019-08-14 16:32:25 +02005387 continue;
5388
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005389 if (isteq(n, ist("")))
Willy Tarreau80739692018-10-05 11:35:57 +02005390 break; // end
5391
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005392 if (!hpack_encode_header(&outbuf, n, v)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005393 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005394 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005395 goto realign_again;
5396 goto full;
5397 }
5398 }
5399
Willy Tarreaucb985a42019-10-07 16:56:34 +02005400 /* update the frame's size */
5401 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5402
5403 if (outbuf.data > h2c->mfs + 9) {
5404 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5405 /* output full */
5406 if (b_space_wraps(mbuf))
5407 goto realign_again;
5408 goto full;
5409 }
5410 }
5411
Willy Tarreau80739692018-10-05 11:35:57 +02005412 /* we may need to add END_STREAM if we have no body :
5413 * - request already closed, or :
5414 * - no transfer-encoding, and :
5415 * - no content-length or content-length:0
Christopher Fauletd0db4232021-01-22 11:46:30 +01005416 * except for CONNECT requests.
Willy Tarreau80739692018-10-05 11:35:57 +02005417 */
Christopher Fauletd0db4232021-01-22 11:46:30 +01005418 if (likely(sl->info.req.meth != HTTP_METH_CONNECT)) {
5419 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM)
5420 es_now = 1;
5421 if (sl->flags & HTX_SL_F_BODYLESS)
5422 es_now = 1;
5423 }
5424 else {
5425 h2s->flags |= H2_SF_BODY_TUNNEL;
5426 }
Willy Tarreau80739692018-10-05 11:35:57 +02005427
Willy Tarreau927b88b2019-03-04 08:03:25 +01005428 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW)
Willy Tarreau80739692018-10-05 11:35:57 +02005429 es_now = 1;
5430
Willy Tarreau80739692018-10-05 11:35:57 +02005431 if (es_now)
5432 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5433
5434 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02005435 TRACE_USER("sent H2 request", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
Willy Tarreaubcc45952019-05-26 10:05:50 +02005436 b_add(mbuf, outbuf.data);
Willy Tarreau80739692018-10-05 11:35:57 +02005437 h2s->flags |= H2_SF_HEADERS_SENT;
5438 h2s->st = H2_SS_OPEN;
5439
Willy Tarreau80739692018-10-05 11:35:57 +02005440 if (es_now) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005441 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 +02005442 // trim any possibly pending data (eg: inconsistent content-length)
5443 h2s->flags |= H2_SF_ES_SENT;
5444 h2s->st = H2_SS_HLOC;
5445 }
5446
5447 /* remove all header blocks including the EOH and compute the
5448 * corresponding size.
5449 *
5450 * FIXME: We should remove everything when es_now is set.
5451 */
5452 ret = 0;
5453 idx = htx_get_head(htx);
5454 blk = htx_get_blk(htx, idx);
5455 while (blk != blk_end) {
5456 ret += htx_get_blksz(blk);
5457 blk = htx_remove_blk(htx, blk);
5458 }
5459
Christopher Faulet316934d2019-05-15 14:22:48 +02005460 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
5461 ret += htx_get_blksz(blk_end);
Willy Tarreau80739692018-10-05 11:35:57 +02005462 htx_remove_blk(htx, blk_end);
Christopher Faulet316934d2019-05-15 14:22:48 +02005463 }
Willy Tarreau80739692018-10-05 11:35:57 +02005464
5465 end:
5466 return ret;
5467 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005468 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5469 goto retry;
Willy Tarreau80739692018-10-05 11:35:57 +02005470 h2c->flags |= H2_CF_MUX_MFULL;
5471 h2s->flags |= H2_SF_BLK_MROOM;
5472 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005473 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 +02005474 goto end;
5475 fail:
5476 /* unparsable HTX messages, too large ones to be produced in the local
5477 * list etc go here (unrecoverable errors).
5478 */
5479 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5480 ret = 0;
5481 goto end;
5482}
5483
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005484/* Try to send a DATA frame matching HTTP response present in HTX structure
Willy Tarreau98de12a2018-12-12 07:03:00 +01005485 * present in <buf>, for stream <h2s>. Returns the number of bytes sent. The
5486 * caller must check the stream's status to detect any error which might have
5487 * happened subsequently to a successful send. Returns the number of data bytes
Christopher Faulet54b5e212019-06-04 10:08:28 +02005488 * consumed, or zero if nothing done. Note that EOM count for 1 byte.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005489 */
Christopher Faulet142854b2020-12-02 15:12:40 +01005490static size_t h2s_make_data(struct h2s *h2s, struct buffer *buf, size_t count)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005491{
5492 struct h2c *h2c = h2s->h2c;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005493 struct htx *htx;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005494 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005495 struct buffer *mbuf;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005496 size_t total = 0;
5497 int es_now = 0;
5498 int bsize; /* htx block size */
5499 int fsize; /* h2 frame size */
5500 struct htx_blk *blk;
5501 enum htx_blk_type type;
5502 int idx;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005503 int trunc_out; /* non-zero if truncated on out buf */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005504
Willy Tarreau7838a792019-08-12 18:42:03 +02005505 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5506
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005507 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005508 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005509 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005510 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005511 goto end;
5512 }
5513
Willy Tarreau98de12a2018-12-12 07:03:00 +01005514 htx = htx_from_buf(buf);
5515
Christopher Faulet54b5e212019-06-04 10:08:28 +02005516 /* We only come here with HTX_BLK_DATA blocks. However, while looping,
5517 * we can meet an HTX_BLK_EOM block that we'll leave to the caller to
5518 * handle.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005519 */
5520
5521 new_frame:
Willy Tarreauee573762018-12-04 15:25:57 +01005522 if (!count || htx_is_empty(htx))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005523 goto end;
5524
5525 idx = htx_get_head(htx);
5526 blk = htx_get_blk(htx, idx);
Christopher Faulet54b5e212019-06-04 10:08:28 +02005527 type = htx_get_blk_type(blk); // DATA or EOM
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005528 bsize = htx_get_blksz(blk);
5529 fsize = bsize;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005530 trunc_out = 0;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005531
Christopher Faulet54b5e212019-06-04 10:08:28 +02005532 if (type == HTX_BLK_EOM) {
Willy Tarreau7eeb10a2019-01-04 09:28:17 +01005533 if (h2s->flags & H2_SF_ES_SENT) {
5534 /* ES already sent */
5535 htx_remove_blk(htx, blk);
5536 total++; // EOM counts as one byte
5537 count--;
5538 goto end;
5539 }
5540 }
5541 else if (type != HTX_BLK_DATA)
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005542 goto end;
Christopher Fauletf95f8762021-01-22 11:59:07 +01005543 else if ((h2c->flags & H2_CF_IS_BACK) &&
5544 (h2s->flags & (H2_SF_HEADERS_RCVD|H2_SF_BODY_TUNNEL)) == H2_SF_BODY_TUNNEL) {
5545 /* The response HEADERS frame not received yet. Thus the tunnel
5546 * is not fully established yet. In this situation, we block
5547 * data sending.
5548 */
5549 h2s->flags |= H2_SF_BLK_MBUSY;
5550 TRACE_STATE("Request DATA frame blocked waiting for tunnel establishment", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5551 goto end;
5552 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01005553 else if ((h2c->flags & H2_CF_IS_BACK) && (h2s->flags & H2_SF_TUNNEL_ABRT)) {
5554 /* a tunnel attempt was aborted but the is pending raw data to xfer to the server.
5555 * Thus the stream is closed with the CANCEL error. The error will be reported to
5556 * the upper layer as aserver abort. But at this stage there is nothing more we can
5557 * do. We just wait for the end of the response to be sure to not truncate it.
5558 */
5559 if (!(h2s->flags & H2_SF_ES_RCVD)) {
5560 TRACE_STATE("Request DATA frame blocked waiting end of aborted tunnel", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5561 h2s->flags |= H2_SF_BLK_MBUSY;
5562 }
5563 else {
5564 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
5565 h2s_error(h2s, H2_ERR_CANCEL);
5566 }
5567 goto end;
5568 }
Willy Tarreau98de12a2018-12-12 07:03:00 +01005569
Willy Tarreau9c218e72019-05-26 10:08:28 +02005570 mbuf = br_tail(h2c->mbuf);
5571 retry:
5572 if (!h2_get_buf(h2c, mbuf)) {
5573 h2c->flags |= H2_CF_MUX_MALLOC;
5574 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005575 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 +02005576 goto end;
5577 }
5578
Willy Tarreau98de12a2018-12-12 07:03:00 +01005579 /* Perform some optimizations to reduce the number of buffer copies.
5580 * First, if the mux's buffer is empty and the htx area contains
5581 * exactly one data block of the same size as the requested count, and
5582 * this count fits within the frame size, the stream's window size, and
5583 * the connection's window size, then it's possible to simply swap the
5584 * caller's buffer with the mux's output buffer and adjust offsets and
5585 * length to match the entire DATA HTX block in the middle. In this
5586 * case we perform a true zero-copy operation from end-to-end. This is
5587 * the situation that happens all the time with large files. Second, if
5588 * this is not possible, but the mux's output buffer is empty, we still
5589 * have an opportunity to avoid the copy to the intermediary buffer, by
5590 * making the intermediary buffer's area point to the output buffer's
5591 * area. In this case we want to skip the HTX header to make sure that
5592 * copies remain aligned and that this operation remains possible all
5593 * the time. This goes for headers, data blocks and any data extracted
5594 * from the HTX blocks.
5595 */
5596 if (unlikely(fsize == count &&
Christopher Faulet192c6a22019-06-11 16:32:24 +02005597 htx_nbblks(htx) == 1 && type == HTX_BLK_DATA &&
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005598 fsize <= h2s_mws(h2s) && fsize <= h2c->mws && fsize <= h2c->mfs)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005599 void *old_area = mbuf->area;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005600
Willy Tarreaubcc45952019-05-26 10:05:50 +02005601 if (b_data(mbuf)) {
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005602 /* Too bad there are data left there. We're willing to memcpy/memmove
5603 * up to 1/4 of the buffer, which means that it's OK to copy a large
5604 * frame into a buffer containing few data if it needs to be realigned,
5605 * and that it's also OK to copy few data without realigning. Otherwise
5606 * we'll pretend the mbuf is full and wait for it to become empty.
Willy Tarreau98de12a2018-12-12 07:03:00 +01005607 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005608 if (fsize + 9 <= b_room(mbuf) &&
5609 (b_data(mbuf) <= b_size(mbuf) / 4 ||
Willy Tarreau7838a792019-08-12 18:42:03 +02005610 (fsize <= b_size(mbuf) / 4 && fsize + 9 <= b_contig_space(mbuf)))) {
5611 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 +01005612 goto copy;
Willy Tarreau7838a792019-08-12 18:42:03 +02005613 }
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005614
Willy Tarreau9c218e72019-05-26 10:08:28 +02005615 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5616 goto retry;
5617
Willy Tarreau98de12a2018-12-12 07:03:00 +01005618 h2c->flags |= H2_CF_MUX_MFULL;
5619 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005620 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 +01005621 goto end;
5622 }
5623
5624 /* map an H2 frame to the HTX block so that we can put the
5625 * frame header there.
5626 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005627 *mbuf = b_make(buf->area, buf->size, sizeof(struct htx) + blk->addr - 9, fsize + 9);
5628 outbuf.area = b_head(mbuf);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005629
5630 /* prepend an H2 DATA frame header just before the DATA block */
5631 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5632 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5633 h2_set_frame_size(outbuf.area, fsize);
5634
5635 /* update windows */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005636 h2s->sws -= fsize;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005637 h2c->mws -= fsize;
5638
5639 /* and exchange with our old area */
5640 buf->area = old_area;
5641 buf->data = buf->head = 0;
5642 total += fsize;
Willy Tarreau7838a792019-08-12 18:42:03 +02005643
5644 TRACE_PROTO("sent H2 DATA frame (zero-copy)", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005645 goto end;
5646 }
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005647
Willy Tarreau98de12a2018-12-12 07:03:00 +01005648 copy:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005649 /* for DATA and EOM we'll have to emit a frame, even if empty */
5650
5651 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005652 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5653 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005654 break;
5655 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005656 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005657 }
5658
5659 if (outbuf.size < 9) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02005660 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5661 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005662 h2c->flags |= H2_CF_MUX_MFULL;
5663 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005664 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005665 goto end;
5666 }
5667
5668 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
5669 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5670 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5671 outbuf.data = 9;
5672
5673 /* we have in <fsize> the exact number of bytes we need to copy from
5674 * the HTX buffer. We need to check this against the connection's and
5675 * the stream's send windows, and to ensure that this fits in the max
5676 * frame size and in the buffer's available space minus 9 bytes (for
5677 * the frame header). The connection's flow control is applied last so
5678 * that we can use a separate list of streams which are immediately
5679 * unblocked on window opening. Note: we don't implement padding.
5680 */
5681
5682 /* EOM is presented with bsize==1 but would lead to the emission of an
5683 * empty frame, thus we force it to zero here.
5684 */
5685 if (type == HTX_BLK_EOM)
5686 bsize = fsize = 0;
5687
5688 if (!fsize)
5689 goto send_empty;
5690
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005691 if (h2s_mws(h2s) <= 0) {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005692 h2s->flags |= H2_SF_BLK_SFCTL;
Willy Tarreauc234ae32019-05-13 17:56:11 +02005693 if (LIST_ADDED(&h2s->list))
Olivier Houchardbfe2a832019-05-10 14:02:21 +02005694 LIST_DEL_INIT(&h2s->list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +02005695 LIST_ADDQ(&h2c->blocked_list, &h2s->list);
Willy Tarreau7838a792019-08-12 18:42:03 +02005696 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 +01005697 goto end;
5698 }
5699
Willy Tarreauee573762018-12-04 15:25:57 +01005700 if (fsize > count)
5701 fsize = count;
5702
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005703 if (fsize > h2s_mws(h2s))
5704 fsize = h2s_mws(h2s); // >0
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005705
5706 if (h2c->mfs && fsize > h2c->mfs)
5707 fsize = h2c->mfs; // >0
5708
5709 if (fsize + 9 > outbuf.size) {
Willy Tarreau455d5682019-05-24 19:42:18 +02005710 /* It doesn't fit at once. If it at least fits once split and
5711 * the amount of data to move is low, let's defragment the
5712 * buffer now.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005713 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005714 if (b_space_wraps(mbuf) &&
5715 (fsize + 9 <= b_room(mbuf)) &&
5716 b_data(mbuf) <= MAX_DATA_REALIGN)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005717 goto realign_again;
5718 fsize = outbuf.size - 9;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005719 trunc_out = 1;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005720
5721 if (fsize <= 0) {
5722 /* no need to send an empty frame here */
Willy Tarreau9c218e72019-05-26 10:08:28 +02005723 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5724 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005725 h2c->flags |= H2_CF_MUX_MFULL;
5726 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005727 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005728 goto end;
5729 }
5730 }
5731
5732 if (h2c->mws <= 0) {
5733 h2s->flags |= H2_SF_BLK_MFCTL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005734 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 +01005735 goto end;
5736 }
5737
5738 if (fsize > h2c->mws)
5739 fsize = h2c->mws;
5740
5741 /* now let's copy this this into the output buffer */
5742 memcpy(outbuf.area + 9, htx_get_blk_ptr(htx, blk), fsize);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005743 h2s->sws -= fsize;
Willy Tarreau0f799ca2018-12-04 15:20:11 +01005744 h2c->mws -= fsize;
Willy Tarreauee573762018-12-04 15:25:57 +01005745 count -= fsize;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005746
5747 send_empty:
5748 /* update the frame's size */
5749 h2_set_frame_size(outbuf.area, fsize);
5750
5751 /* FIXME: for now we only set the ES flag on empty DATA frames, once
5752 * meeting EOM. We should optimize this later.
5753 */
5754 if (type == HTX_BLK_EOM) {
Willy Tarreauee573762018-12-04 15:25:57 +01005755 total++; // EOM counts as one byte
5756 count--;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005757 es_now = 1;
5758 }
5759
5760 if (es_now)
5761 outbuf.area[4] |= H2_F_DATA_END_STREAM;
5762
5763 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005764 b_add(mbuf, fsize + 9);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005765
5766 /* consume incoming HTX block, including EOM */
5767 total += fsize;
5768 if (fsize == bsize) {
5769 htx_remove_blk(htx, blk);
Willy Tarreau7838a792019-08-12 18:42:03 +02005770 if (fsize) {
5771 TRACE_DEVEL("more data available, trying to send another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005772 goto new_frame;
Willy Tarreau7838a792019-08-12 18:42:03 +02005773 }
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005774 } else {
5775 /* we've truncated this block */
5776 htx_cut_data_blk(htx, blk, fsize);
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005777 if (trunc_out)
5778 goto new_frame;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005779 }
5780
5781 if (es_now) {
5782 if (h2s->st == H2_SS_OPEN)
5783 h2s->st = H2_SS_HLOC;
5784 else
5785 h2s_close(h2s);
5786
5787 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005788 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 +01005789 }
5790
5791 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005792 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005793 return total;
5794}
5795
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005796/* Try to send a HEADERS frame matching HTX_BLK_TLR series of blocks present in
5797 * HTX message <htx> for the H2 stream <h2s>. Returns the number of bytes
5798 * processed. The caller must check the stream's status to detect any error
5799 * which might have happened subsequently to a successful send. The htx blocks
5800 * are automatically removed from the message. The htx message is assumed to be
5801 * valid since produced from the internal code. Processing stops when meeting
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005802 * the EOM, which is *not* removed. All trailers are processed at once and sent
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005803 * as a single frame. The ES flag is always set.
5804 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005805static size_t h2s_make_trailers(struct h2s *h2s, struct htx *htx)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005806{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005807 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005808 struct h2c *h2c = h2s->h2c;
5809 struct htx_blk *blk;
5810 struct htx_blk *blk_end;
5811 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005812 struct buffer *mbuf;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005813 enum htx_blk_type type;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005814 int ret = 0;
5815 int hdr;
5816 int idx;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005817
Willy Tarreau7838a792019-08-12 18:42:03 +02005818 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5819
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005820 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005821 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005822 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005823 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005824 goto end;
5825 }
5826
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005827 /* determine the first block which must not be deleted, blk_end may
5828 * be NULL if all blocks have to be deleted. also get trailers.
5829 */
5830 idx = htx_get_head(htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005831 blk_end = NULL;
5832
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005833 hdr = 0;
5834 while (idx != -1) {
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005835 blk = htx_get_blk(htx, idx);
5836 type = htx_get_blk_type(blk);
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005837 idx = htx_get_next(htx, idx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005838 if (type == HTX_BLK_UNUSED)
5839 continue;
5840
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005841 if (type == HTX_BLK_EOT) {
5842 if (idx != -1)
5843 blk_end = blk;
5844 break;
5845 }
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005846 if (type != HTX_BLK_TLR)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005847 break;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005848
Willy Tarreau7838a792019-08-12 18:42:03 +02005849 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01005850 TRACE_ERROR("too many trailers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005851 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005852 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005853
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005854 list[hdr].n = htx_get_blk_name(htx, blk);
5855 list[hdr].v = htx_get_blk_value(htx, blk);
5856 hdr++;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005857 }
5858
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005859 /* marker for end of trailers */
5860 list[hdr].n = ist("");
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005861
Willy Tarreau9c218e72019-05-26 10:08:28 +02005862 mbuf = br_tail(h2c->mbuf);
5863 retry:
5864 if (!h2_get_buf(h2c, mbuf)) {
5865 h2c->flags |= H2_CF_MUX_MALLOC;
5866 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005867 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 +02005868 goto end;
5869 }
5870
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005871 chunk_reset(&outbuf);
5872
5873 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005874 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5875 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005876 break;
5877 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005878 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005879 }
5880
5881 if (outbuf.size < 9)
5882 goto full;
5883
5884 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4,ES=1 */
5885 memcpy(outbuf.area, "\x00\x00\x00\x01\x05", 5);
5886 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5887 outbuf.data = 9;
5888
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005889 /* encode all headers */
5890 for (idx = 0; idx < hdr; idx++) {
5891 /* these ones do not exist in H2 or must not appear in
5892 * trailers and must be dropped.
5893 */
5894 if (isteq(list[idx].n, ist("host")) ||
5895 isteq(list[idx].n, ist("content-length")) ||
5896 isteq(list[idx].n, ist("connection")) ||
5897 isteq(list[idx].n, ist("proxy-connection")) ||
5898 isteq(list[idx].n, ist("keep-alive")) ||
5899 isteq(list[idx].n, ist("upgrade")) ||
5900 isteq(list[idx].n, ist("te")) ||
5901 isteq(list[idx].n, ist("transfer-encoding")))
5902 continue;
5903
Christopher Faulet86d144c2019-08-14 16:32:25 +02005904 /* Skip all pseudo-headers */
5905 if (*(list[idx].n.ptr) == ':')
5906 continue;
5907
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005908 if (!hpack_encode_header(&outbuf, list[idx].n, list[idx].v)) {
5909 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005910 if (b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005911 goto realign_again;
5912 goto full;
5913 }
5914 }
5915
Willy Tarreau5121e5d2019-05-06 15:13:41 +02005916 if (outbuf.data == 9) {
5917 /* here we have a problem, we have nothing to emit (either we
5918 * received an empty trailers block followed or we removed its
5919 * contents above). Because of this we can't send a HEADERS
5920 * frame, so we have to cheat and instead send an empty DATA
5921 * frame conveying the ES flag.
Willy Tarreau67b8cae2019-02-21 18:16:35 +01005922 */
5923 outbuf.area[3] = H2_FT_DATA;
5924 outbuf.area[4] = H2_F_DATA_END_STREAM;
5925 }
5926
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005927 /* update the frame's size */
5928 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5929
Willy Tarreau572d9f52019-10-11 16:58:37 +02005930 if (outbuf.data > h2c->mfs + 9) {
5931 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5932 /* output full */
5933 if (b_space_wraps(mbuf))
5934 goto realign_again;
5935 goto full;
5936 }
5937 }
5938
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005939 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02005940 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 +02005941 b_add(mbuf, outbuf.data);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005942 h2s->flags |= H2_SF_ES_SENT;
5943
5944 if (h2s->st == H2_SS_OPEN)
5945 h2s->st = H2_SS_HLOC;
5946 else
5947 h2s_close(h2s);
5948
5949 /* OK we could properly deliver the response */
5950 done:
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005951 /* remove all header blocks till the end and compute the corresponding size. */
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005952 ret = 0;
5953 idx = htx_get_head(htx);
5954 blk = htx_get_blk(htx, idx);
5955 while (blk != blk_end) {
5956 ret += htx_get_blksz(blk);
5957 blk = htx_remove_blk(htx, blk);
5958 }
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005959
5960 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
5961 ret += htx_get_blksz(blk_end);
5962 htx_remove_blk(htx, blk_end);
5963 }
5964
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005965 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005966 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005967 return ret;
5968 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005969 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5970 goto retry;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005971 h2c->flags |= H2_CF_MUX_MFULL;
5972 h2s->flags |= H2_SF_BLK_MROOM;
5973 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005974 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 +01005975 goto end;
5976 fail:
5977 /* unparsable HTX messages, too large ones to be produced in the local
5978 * list etc go here (unrecoverable errors).
5979 */
5980 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5981 ret = 0;
5982 goto end;
5983}
5984
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01005985/* Called from the upper layer, to subscribe <es> to events <event_type>. The
5986 * event subscriber <es> is not allowed to change from a previous call as long
5987 * as at least one event is still subscribed. The <event_type> must only be a
5988 * combination of SUB_RETRY_RECV and SUB_RETRY_SEND. It always returns 0.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005989 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01005990static int h2_subscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard6ff20392018-07-17 18:46:31 +02005991{
Olivier Houchard6ff20392018-07-17 18:46:31 +02005992 struct h2s *h2s = cs->ctx;
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02005993 struct h2c *h2c = h2s->h2c;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005994
Willy Tarreau7838a792019-08-12 18:42:03 +02005995 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01005996
5997 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01005998 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01005999
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006000 es->events |= event_type;
6001 h2s->subs = es;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006002
6003 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006004 TRACE_DEVEL("subscribe(recv)", H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006005
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006006 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006007 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2c->conn, h2s);
Olivier Houchardf8338152019-05-14 17:50:32 +02006008 if (!(h2s->flags & H2_SF_BLK_SFCTL) &&
6009 !LIST_ADDED(&h2s->list)) {
6010 if (h2s->flags & H2_SF_BLK_MFCTL)
6011 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
6012 else
6013 LIST_ADDQ(&h2c->send_list, &h2s->list);
Olivier Houcharde1c6dbc2018-08-01 17:06:43 +02006014 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02006015 }
Willy Tarreau7838a792019-08-12 18:42:03 +02006016 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006017 return 0;
Olivier Houchard6ff20392018-07-17 18:46:31 +02006018}
6019
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006020/* Called from the upper layer, to unsubscribe <es> from events <event_type>.
6021 * The <es> pointer is not allowed to differ from the one passed to the
6022 * subscribe() call. It always returns zero.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006023 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006024static int h2_unsubscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006025{
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006026 struct h2s *h2s = cs->ctx;
6027
Willy Tarreau7838a792019-08-12 18:42:03 +02006028 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006029
6030 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006031 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006032
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006033 es->events &= ~event_type;
6034 if (!es->events)
Willy Tarreauf96508a2020-01-10 11:12:48 +01006035 h2s->subs = NULL;
6036
6037 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006038 TRACE_DEVEL("unsubscribe(recv)", H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006039
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006040 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006041 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006042 h2s->flags &= ~H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006043 if (!(h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)))
6044 LIST_DEL_INIT(&h2s->list);
Olivier Houchardd846c262018-10-19 17:24:29 +02006045 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01006046
Willy Tarreau7838a792019-08-12 18:42:03 +02006047 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006048 return 0;
6049}
6050
6051
Olivier Houchard511efea2018-08-16 15:30:32 +02006052/* Called from the upper layer, to receive data */
6053static size_t h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
6054{
Olivier Houchard638b7992018-08-16 15:41:52 +02006055 struct h2s *h2s = cs->ctx;
Willy Tarreau082f5592018-11-25 08:03:32 +01006056 struct h2c *h2c = h2s->h2c;
Willy Tarreau86724e22018-12-01 23:19:43 +01006057 struct htx *h2s_htx = NULL;
6058 struct htx *buf_htx = NULL;
Olivier Houchard511efea2018-08-16 15:30:32 +02006059 size_t ret = 0;
6060
Willy Tarreau7838a792019-08-12 18:42:03 +02006061 TRACE_ENTER(H2_EV_STRM_RECV, h2c->conn, h2s);
6062
Olivier Houchard511efea2018-08-16 15:30:32 +02006063 /* transfer possibly pending data to the upper layer */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006064 h2s_htx = htx_from_buf(&h2s->rxbuf);
6065 if (htx_is_empty(h2s_htx)) {
6066 /* Here htx_to_buf() will set buffer data to 0 because
6067 * the HTX is empty.
6068 */
6069 htx_to_buf(h2s_htx, &h2s->rxbuf);
6070 goto end;
6071 }
Willy Tarreau7196dd62019-03-05 10:51:11 +01006072
Christopher Faulet9b79a102019-07-15 11:22:56 +02006073 ret = h2s_htx->data;
6074 buf_htx = htx_from_buf(buf);
Willy Tarreau7196dd62019-03-05 10:51:11 +01006075
Christopher Faulet9b79a102019-07-15 11:22:56 +02006076 /* <buf> is empty and the message is small enough, swap the
6077 * buffers. */
6078 if (htx_is_empty(buf_htx) && htx_used_space(h2s_htx) <= count) {
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01006079 htx_to_buf(buf_htx, buf);
6080 htx_to_buf(h2s_htx, &h2s->rxbuf);
Christopher Faulet9b79a102019-07-15 11:22:56 +02006081 b_xfer(buf, &h2s->rxbuf, b_data(&h2s->rxbuf));
6082 goto end;
Willy Tarreau86724e22018-12-01 23:19:43 +01006083 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02006084
6085 htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_EOM);
6086
6087 if (h2s_htx->flags & HTX_FL_PARSING_ERROR) {
6088 buf_htx->flags |= HTX_FL_PARSING_ERROR;
6089 if (htx_is_empty(buf_htx))
6090 cs->flags |= CS_FL_EOI;
Willy Tarreau86724e22018-12-01 23:19:43 +01006091 }
Christopher Faulet810df062020-07-22 16:20:34 +02006092 else if (htx_is_empty(h2s_htx))
6093 buf_htx->flags |= (h2s_htx->flags & HTX_FL_EOI);
Olivier Houchard511efea2018-08-16 15:30:32 +02006094
Christopher Faulet9b79a102019-07-15 11:22:56 +02006095 buf_htx->extra = (h2s_htx->extra ? (h2s_htx->data + h2s_htx->extra) : 0);
6096 htx_to_buf(buf_htx, buf);
6097 htx_to_buf(h2s_htx, &h2s->rxbuf);
6098 ret -= h2s_htx->data;
6099
Christopher Faulet37070b22019-02-14 15:12:14 +01006100 end:
Olivier Houchard638b7992018-08-16 15:41:52 +02006101 if (b_data(&h2s->rxbuf))
Olivier Houchardd247be02018-12-06 16:22:29 +01006102 cs->flags |= (CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02006103 else {
Olivier Houchardd247be02018-12-06 16:22:29 +01006104 cs->flags &= ~(CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Christopher Fauletd0db4232021-01-22 11:46:30 +01006105 if (h2s->flags & H2_SF_ES_RCVD) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02006106 cs->flags |= CS_FL_EOI;
Christopher Fauletd0db4232021-01-22 11:46:30 +01006107 /* Add EOS flag for tunnel */
6108 if (h2s->flags & H2_SF_BODY_TUNNEL)
6109 cs->flags |= CS_FL_EOS;
6110 }
Christopher Fauletaade4ed2020-10-08 15:38:41 +02006111 if (h2c_read0_pending(h2c) || h2s->st == H2_SS_CLOSED)
Olivier Houchard511efea2018-08-16 15:30:32 +02006112 cs->flags |= CS_FL_EOS;
Olivier Houchard71748cb2018-12-17 14:16:46 +01006113 if (cs->flags & CS_FL_ERR_PENDING)
6114 cs->flags |= CS_FL_ERROR;
Olivier Houchard638b7992018-08-16 15:41:52 +02006115 if (b_size(&h2s->rxbuf)) {
6116 b_free(&h2s->rxbuf);
6117 offer_buffers(NULL, tasks_run_queue);
6118 }
Olivier Houchard511efea2018-08-16 15:30:32 +02006119 }
6120
Willy Tarreau082f5592018-11-25 08:03:32 +01006121 if (ret && h2c->dsi == h2s->id) {
6122 /* demux is blocking on this stream's buffer */
6123 h2c->flags &= ~H2_CF_DEM_SFULL;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02006124 h2c_restart_reading(h2c, 1);
Willy Tarreau082f5592018-11-25 08:03:32 +01006125 }
Christopher Faulet37070b22019-02-14 15:12:14 +01006126
Willy Tarreau7838a792019-08-12 18:42:03 +02006127 TRACE_LEAVE(H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard511efea2018-08-16 15:30:32 +02006128 return ret;
6129}
6130
Olivier Houchardd846c262018-10-19 17:24:29 +02006131
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006132/* Called from the upper layer, to send data from buffer <buf> for no more than
6133 * <count> bytes. Returns the number of bytes effectively sent. Some status
6134 * flags may be updated on the conn_stream.
6135 */
Christopher Fauletd44a9b32018-07-27 11:59:41 +02006136static size_t h2_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
Willy Tarreau62f52692017-10-08 23:01:42 +02006137{
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006138 struct h2s *h2s = cs->ctx;
Willy Tarreau1dc41e72018-06-14 13:21:28 +02006139 size_t total = 0;
Willy Tarreau5dd17352018-06-14 13:33:30 +02006140 size_t ret;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006141 struct htx *htx;
6142 struct htx_blk *blk;
6143 enum htx_blk_type btype;
6144 uint32_t bsize;
6145 int32_t idx;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006146
Willy Tarreau7838a792019-08-12 18:42:03 +02006147 TRACE_ENTER(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
6148
Olivier Houchardd360ac62019-03-22 17:37:16 +01006149 /* If we were not just woken because we wanted to send but couldn't,
6150 * and there's somebody else that is waiting to send, do nothing,
6151 * we will subscribe later and be put at the end of the list
6152 */
Willy Tarreaud9464162020-01-10 18:25:07 +01006153 if (!(h2s->flags & H2_SF_NOTIFIED) &&
Willy Tarreau7838a792019-08-12 18:42:03 +02006154 (!LIST_ISEMPTY(&h2s->h2c->send_list) || !LIST_ISEMPTY(&h2s->h2c->fctl_list))) {
6155 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 +01006156 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006157 }
Willy Tarreaud9464162020-01-10 18:25:07 +01006158 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02006159
Willy Tarreau7838a792019-08-12 18:42:03 +02006160 if (h2s->h2c->st0 < H2_CS_FRAME_H) {
6161 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 +02006162 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006163 }
Willy Tarreau6bf641a2018-10-08 09:43:03 +02006164
Willy Tarreaucab22952019-10-31 15:48:18 +01006165 if (h2s->h2c->st0 >= H2_CS_ERROR) {
6166 cs->flags |= CS_FL_ERROR;
6167 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);
6168 return 0;
6169 }
6170
Christopher Faulet9b79a102019-07-15 11:22:56 +02006171 htx = htx_from_buf(buf);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006172
Willy Tarreau0bad0432018-06-14 16:54:01 +02006173 if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count)
Willy Tarreauc4312d32017-11-07 12:01:53 +01006174 h2s->flags |= H2_SF_OUTGOING_DATA;
6175
Willy Tarreau751f2d02018-10-05 09:35:00 +02006176 if (h2s->id == 0) {
6177 int32_t id = h2c_get_next_sid(h2s->h2c);
6178
6179 if (id < 0) {
Willy Tarreau751f2d02018-10-05 09:35:00 +02006180 cs->flags |= CS_FL_ERROR;
Willy Tarreau7838a792019-08-12 18:42:03 +02006181 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 +02006182 return 0;
6183 }
6184
6185 eb32_delete(&h2s->by_id);
6186 h2s->by_id.key = h2s->id = id;
6187 h2s->h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01006188 h2s->h2c->nb_reserved--;
Willy Tarreau751f2d02018-10-05 09:35:00 +02006189 eb32_insert(&h2s->h2c->streams_by_id, &h2s->by_id);
6190 }
6191
Christopher Faulet9b79a102019-07-15 11:22:56 +02006192 while (h2s->st < H2_SS_HLOC && !(h2s->flags & H2_SF_BLK_ANY) &&
6193 count && !htx_is_empty(htx)) {
6194 idx = htx_get_head(htx);
6195 blk = htx_get_blk(htx, idx);
6196 btype = htx_get_blk_type(blk);
6197 bsize = htx_get_blksz(blk);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006198
Christopher Faulet9b79a102019-07-15 11:22:56 +02006199 switch (btype) {
Willy Tarreau80739692018-10-05 11:35:57 +02006200 case HTX_BLK_REQ_SL:
6201 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006202 ret = h2s_bck_make_req_headers(h2s, htx);
Willy Tarreau80739692018-10-05 11:35:57 +02006203 if (ret > 0) {
6204 total += ret;
6205 count -= ret;
6206 if (ret < bsize)
6207 goto done;
6208 }
6209 break;
6210
Willy Tarreau115e83b2018-12-01 19:17:53 +01006211 case HTX_BLK_RES_SL:
6212 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006213 ret = h2s_frt_make_resp_headers(h2s, htx);
Willy Tarreau115e83b2018-12-01 19:17:53 +01006214 if (ret > 0) {
6215 total += ret;
6216 count -= ret;
6217 if (ret < bsize)
6218 goto done;
6219 }
6220 break;
6221
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006222 case HTX_BLK_DATA:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006223 case HTX_BLK_EOM:
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006224 /* all these cause the emission of a DATA frame (possibly empty).
6225 * This EOM necessarily is one before trailers, as the EOM following
6226 * trailers would have been consumed by the trailers parser.
6227 */
Christopher Faulet142854b2020-12-02 15:12:40 +01006228 ret = h2s_make_data(h2s, buf, count);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006229 if (ret > 0) {
Willy Tarreau98de12a2018-12-12 07:03:00 +01006230 htx = htx_from_buf(buf);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006231 total += ret;
6232 count -= ret;
6233 if (ret < bsize)
6234 goto done;
6235 }
6236 break;
6237
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006238 case HTX_BLK_TLR:
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006239 case HTX_BLK_EOT:
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006240 /* This is the first trailers block, all the subsequent ones AND
6241 * the EOM will be swallowed by the parser.
6242 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006243 ret = h2s_make_trailers(h2s, htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006244 if (ret > 0) {
6245 total += ret;
6246 count -= ret;
6247 if (ret < bsize)
6248 goto done;
6249 }
6250 break;
6251
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006252 default:
6253 htx_remove_blk(htx, blk);
6254 total += bsize;
6255 count -= bsize;
6256 break;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006257 }
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006258 }
6259
Christopher Faulet9b79a102019-07-15 11:22:56 +02006260 done:
Willy Tarreau2b778482019-05-06 15:00:22 +02006261 if (h2s->st >= H2_SS_HLOC) {
Willy Tarreau00610962018-07-19 10:58:28 +02006262 /* trim any possibly pending data after we close (extra CR-LF,
6263 * unprocessed trailers, abnormal extra data, ...)
6264 */
Willy Tarreau0bad0432018-06-14 16:54:01 +02006265 total += count;
6266 count = 0;
Willy Tarreau00610962018-07-19 10:58:28 +02006267 }
6268
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006269 /* RST are sent similarly to frame acks */
Willy Tarreau02492192017-12-07 15:59:29 +01006270 if (h2s->st == H2_SS_ERROR || h2s->flags & H2_SF_RST_RCVD) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006271 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 +01006272 cs_set_error(cs);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01006273 if (h2s_send_rst_stream(h2s->h2c, h2s) > 0)
Willy Tarreau00dd0782018-03-01 16:31:34 +01006274 h2s_close(h2s);
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006275 }
6276
Christopher Faulet9b79a102019-07-15 11:22:56 +02006277 htx_to_buf(htx, buf);
Olivier Houchardd846c262018-10-19 17:24:29 +02006278
Olivier Houchard7505f942018-08-21 18:10:44 +02006279 if (total > 0) {
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006280 if (!(h2s->h2c->wait_event.events & SUB_RETRY_SEND)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006281 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 +02006282 tasklet_wakeup(h2s->h2c->wait_event.tasklet);
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006283 }
Olivier Houchardd846c262018-10-19 17:24:29 +02006284
Olivier Houchard7505f942018-08-21 18:10:44 +02006285 }
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01006286 /* If we're waiting for flow control, and we got a shutr on the
6287 * connection, we will never be unlocked, so add an error on
6288 * the conn_stream.
6289 */
6290 if (conn_xprt_read0_pending(h2s->h2c->conn) &&
6291 !b_data(&h2s->h2c->dbuf) &&
6292 (h2s->flags & (H2_SF_BLK_SFCTL | H2_SF_BLK_MFCTL))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006293 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 +01006294 if (cs->flags & CS_FL_EOS)
6295 cs->flags |= CS_FL_ERROR;
6296 else
6297 cs->flags |= CS_FL_ERR_PENDING;
6298 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006299
Willy Tarreau5723f292020-01-10 15:16:57 +01006300 if (total > 0 && !(h2s->flags & H2_SF_BLK_SFCTL) &&
6301 !(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006302 /* Ok we managed to send something, leave the send_list if we were still there */
Olivier Houchardd360ac62019-03-22 17:37:16 +01006303 LIST_DEL_INIT(&h2s->list);
6304 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006305
Willy Tarreau7838a792019-08-12 18:42:03 +02006306 TRACE_LEAVE(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006307 return total;
Willy Tarreau62f52692017-10-08 23:01:42 +02006308}
6309
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006310/* for debugging with CLI's "show fd" command */
Willy Tarreau8050efe2021-01-21 08:26:06 +01006311static int h2_show_fd(struct buffer *msg, struct connection *conn)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006312{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01006313 struct h2c *h2c = conn->ctx;
Willy Tarreau987c0632018-12-18 10:32:05 +01006314 struct h2s *h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006315 struct eb32_node *node;
6316 int fctl_cnt = 0;
6317 int send_cnt = 0;
6318 int tree_cnt = 0;
6319 int orph_cnt = 0;
Willy Tarreau60f62682019-05-26 11:32:27 +02006320 struct buffer *hmbuf, *tmbuf;
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006321 int ret = 0;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006322
6323 if (!h2c)
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006324 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006325
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006326 list_for_each_entry(h2s, &h2c->fctl_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006327 fctl_cnt++;
6328
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006329 list_for_each_entry(h2s, &h2c->send_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006330 send_cnt++;
6331
Willy Tarreau3af37712018-12-18 14:34:41 +01006332 h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006333 node = eb32_first(&h2c->streams_by_id);
6334 while (node) {
6335 h2s = container_of(node, struct h2s, by_id);
6336 tree_cnt++;
6337 if (!h2s->cs)
6338 orph_cnt++;
6339 node = eb32_next(node);
6340 }
6341
Willy Tarreau60f62682019-05-26 11:32:27 +02006342 hmbuf = br_head(h2c->mbuf);
Willy Tarreaubcc45952019-05-26 10:05:50 +02006343 tmbuf = br_tail(h2c->mbuf);
Willy Tarreauab2ec452019-08-30 07:07:08 +02006344 chunk_appendf(msg, " h2c.st0=%s .err=%d .maxid=%d .lastid=%d .flg=0x%04x"
Willy Tarreau987c0632018-12-18 10:32:05 +01006345 " .nbst=%u .nbcs=%u .fctl_cnt=%d .send_cnt=%d .tree_cnt=%d"
Willy Tarreau60f62682019-05-26 11:32:27 +02006346 " .orph_cnt=%d .sub=%d .dsi=%d .dbuf=%u@%p+%u/%u .msi=%d"
6347 " .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]",
Willy Tarreauab2ec452019-08-30 07:07:08 +02006348 h2c_st_to_str(h2c->st0), h2c->errcode, h2c->max_id, h2c->last_sid, h2c->flags,
Willy Tarreau616ac812018-07-24 14:12:42 +02006349 h2c->nb_streams, h2c->nb_cs, fctl_cnt, send_cnt, tree_cnt, orph_cnt,
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006350 h2c->wait_event.events, h2c->dsi,
Willy Tarreau987c0632018-12-18 10:32:05 +01006351 (unsigned int)b_data(&h2c->dbuf), b_orig(&h2c->dbuf),
6352 (unsigned int)b_head_ofs(&h2c->dbuf), (unsigned int)b_size(&h2c->dbuf),
6353 h2c->msi,
Willy Tarreau60f62682019-05-26 11:32:27 +02006354 br_head_idx(h2c->mbuf), br_tail_idx(h2c->mbuf), br_size(h2c->mbuf),
6355 (unsigned int)b_data(hmbuf), b_orig(hmbuf),
6356 (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf),
Willy Tarreaubcc45952019-05-26 10:05:50 +02006357 (unsigned int)b_data(tmbuf), b_orig(tmbuf),
6358 (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf));
Willy Tarreau987c0632018-12-18 10:32:05 +01006359
6360 if (h2s) {
Willy Tarreaued4464e2021-01-20 15:50:03 +01006361 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 +02006362 h2s, h2s->id, h2s_st_to_str(h2s->st), h2s->flags,
Willy Tarreau987c0632018-12-18 10:32:05 +01006363 (unsigned int)b_data(&h2s->rxbuf), b_orig(&h2s->rxbuf),
6364 (unsigned int)b_head_ofs(&h2s->rxbuf), (unsigned int)b_size(&h2s->rxbuf),
6365 h2s->cs);
6366 if (h2s->cs)
Willy Tarreau98e40b92021-01-20 16:27:01 +01006367 chunk_appendf(msg, "(.flg=0x%08x .data=%p)",
Willy Tarreau987c0632018-12-18 10:32:05 +01006368 h2s->cs->flags, h2s->cs->data);
Willy Tarreau98e40b92021-01-20 16:27:01 +01006369
6370 chunk_appendf(&trash, " .subs=%p", h2s->subs);
6371 if (h2s->subs) {
6372 if (h2s->subs) {
6373 chunk_appendf(&trash, "(ev=%d tl=%p", h2s->subs->events, h2s->subs->tasklet);
6374 chunk_appendf(&trash, " tl.calls=%d tl.ctx=%p tl.fct=",
6375 h2s->subs->tasklet->calls,
6376 h2s->subs->tasklet->context);
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006377 if (h2s->subs->tasklet->calls >= 1000000)
6378 ret = 1;
Willy Tarreau98e40b92021-01-20 16:27:01 +01006379 resolve_sym_name(&trash, NULL, h2s->subs->tasklet->process);
6380 chunk_appendf(&trash, ")");
6381 }
6382 }
Willy Tarreau987c0632018-12-18 10:32:05 +01006383 }
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006384 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006385}
Willy Tarreau62f52692017-10-08 23:01:42 +02006386
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006387/* Migrate the the connection to the current thread.
6388 * Return 0 if successful, non-zero otherwise.
6389 * Expected to be called with the old thread lock held.
6390 */
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006391static int h2_takeover(struct connection *conn, int orig_tid)
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006392{
6393 struct h2c *h2c = conn->ctx;
Willy Tarreau617e80f2020-07-01 16:39:33 +02006394 struct task *task;
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006395
6396 if (fd_takeover(conn->handle.fd, conn) != 0)
6397 return -1;
Olivier Houcharda74bb7e2020-07-03 14:01:21 +02006398
6399 if (conn->xprt->takeover && conn->xprt->takeover(conn, conn->xprt_ctx, orig_tid) != 0) {
6400 /* We failed to takeover the xprt, even if the connection may
6401 * still be valid, flag it as error'd, as we have already
6402 * taken over the fd, and wake the tasklet, so that it will
6403 * destroy it.
6404 */
6405 conn->flags |= CO_FL_ERROR;
6406 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
6407 return -1;
6408 }
6409
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006410 if (h2c->wait_event.events)
6411 h2c->conn->xprt->unsubscribe(h2c->conn, h2c->conn->xprt_ctx,
6412 h2c->wait_event.events, &h2c->wait_event);
6413 /* To let the tasklet know it should free itself, and do nothing else,
6414 * set its context to NULL.
6415 */
6416 h2c->wait_event.tasklet->context = NULL;
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006417 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
Willy Tarreau617e80f2020-07-01 16:39:33 +02006418
6419 task = h2c->task;
6420 if (task) {
6421 task->context = NULL;
6422 h2c->task = NULL;
6423 __ha_barrier_store();
6424 task_kill(task);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006425
6426 h2c->task = task_new(tid_bit);
6427 if (!h2c->task) {
6428 h2_release(h2c);
6429 return -1;
6430 }
6431 h2c->task->process = h2_timeout_task;
6432 h2c->task->context = h2c;
6433 }
6434 h2c->wait_event.tasklet = tasklet_new();
6435 if (!h2c->wait_event.tasklet) {
6436 h2_release(h2c);
6437 return -1;
6438 }
6439 h2c->wait_event.tasklet->process = h2_io_cb;
6440 h2c->wait_event.tasklet->context = h2c;
6441 h2c->conn->xprt->subscribe(h2c->conn, h2c->conn->xprt_ctx,
6442 SUB_RETRY_RECV, &h2c->wait_event);
6443
6444 return 0;
6445}
6446
Willy Tarreau62f52692017-10-08 23:01:42 +02006447/*******************************************************/
6448/* functions below are dedicated to the config parsers */
6449/*******************************************************/
6450
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006451/* config parser for global "tune.h2.header-table-size" */
6452static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx,
6453 struct proxy *defpx, const char *file, int line,
6454 char **err)
6455{
6456 if (too_many_args(1, args, err, NULL))
6457 return -1;
6458
6459 h2_settings_header_table_size = atoi(args[1]);
6460 if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) {
6461 memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]);
6462 return -1;
6463 }
6464 return 0;
6465}
Willy Tarreau62f52692017-10-08 23:01:42 +02006466
Willy Tarreaue6baec02017-07-27 11:45:11 +02006467/* config parser for global "tune.h2.initial-window-size" */
6468static int h2_parse_initial_window_size(char **args, int section_type, struct proxy *curpx,
6469 struct proxy *defpx, const char *file, int line,
6470 char **err)
6471{
6472 if (too_many_args(1, args, err, NULL))
6473 return -1;
6474
6475 h2_settings_initial_window_size = atoi(args[1]);
6476 if (h2_settings_initial_window_size < 0) {
6477 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6478 return -1;
6479 }
6480 return 0;
6481}
6482
Willy Tarreau5242ef82017-07-27 11:47:28 +02006483/* config parser for global "tune.h2.max-concurrent-streams" */
6484static int h2_parse_max_concurrent_streams(char **args, int section_type, struct proxy *curpx,
6485 struct proxy *defpx, const char *file, int line,
6486 char **err)
6487{
6488 if (too_many_args(1, args, err, NULL))
6489 return -1;
6490
6491 h2_settings_max_concurrent_streams = atoi(args[1]);
Willy Tarreau5a490b62019-01-31 10:39:51 +01006492 if ((int)h2_settings_max_concurrent_streams < 0) {
Willy Tarreau5242ef82017-07-27 11:47:28 +02006493 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6494 return -1;
6495 }
6496 return 0;
6497}
6498
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006499/* config parser for global "tune.h2.max-frame-size" */
6500static int h2_parse_max_frame_size(char **args, int section_type, struct proxy *curpx,
6501 struct proxy *defpx, const char *file, int line,
6502 char **err)
6503{
6504 if (too_many_args(1, args, err, NULL))
6505 return -1;
6506
6507 h2_settings_max_frame_size = atoi(args[1]);
6508 if (h2_settings_max_frame_size < 16384 || h2_settings_max_frame_size > 16777215) {
6509 memprintf(err, "'%s' expects a numeric value between 16384 and 16777215.", args[0]);
6510 return -1;
6511 }
6512 return 0;
6513}
6514
Willy Tarreau62f52692017-10-08 23:01:42 +02006515
6516/****************************************/
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05006517/* MUX initialization and instantiation */
Willy Tarreau62f52692017-10-08 23:01:42 +02006518/***************************************/
6519
6520/* The mux operations */
Willy Tarreau680b2bd2018-11-27 07:30:17 +01006521static const struct mux_ops h2_ops = {
Willy Tarreau62f52692017-10-08 23:01:42 +02006522 .init = h2_init,
Olivier Houchard21df6cc2018-09-14 23:21:44 +02006523 .wake = h2_wake,
Willy Tarreau62f52692017-10-08 23:01:42 +02006524 .snd_buf = h2_snd_buf,
Olivier Houchard511efea2018-08-16 15:30:32 +02006525 .rcv_buf = h2_rcv_buf,
Olivier Houchard6ff20392018-07-17 18:46:31 +02006526 .subscribe = h2_subscribe,
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006527 .unsubscribe = h2_unsubscribe,
Willy Tarreau62f52692017-10-08 23:01:42 +02006528 .attach = h2_attach,
Willy Tarreaufafd3982018-11-18 21:29:20 +01006529 .get_first_cs = h2_get_first_cs,
Willy Tarreau62f52692017-10-08 23:01:42 +02006530 .detach = h2_detach,
Olivier Houchard060ed432018-11-06 16:32:42 +01006531 .destroy = h2_destroy,
Olivier Houchardd540b362018-11-05 18:37:53 +01006532 .avail_streams = h2_avail_streams,
Willy Tarreau00f18a32019-01-26 12:19:01 +01006533 .used_streams = h2_used_streams,
Willy Tarreau62f52692017-10-08 23:01:42 +02006534 .shutr = h2_shutr,
6535 .shutw = h2_shutw,
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02006536 .ctl = h2_ctl,
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006537 .show_fd = h2_show_fd,
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006538 .takeover = h2_takeover,
Amaury Denoyelle3d3c0912020-10-14 18:17:06 +02006539 .flags = MX_FL_CLEAN_ABRT|MX_FL_HTX|MX_FL_HOL_RISK,
Willy Tarreau62f52692017-10-08 23:01:42 +02006540 .name = "H2",
6541};
6542
Christopher Faulet32f61c02018-04-10 14:33:41 +02006543static struct mux_proto_list mux_proto_h2 =
Christopher Fauletc985f6c2019-07-15 11:42:52 +02006544 { .token = IST("h2"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BOTH, .mux = &h2_ops };
Willy Tarreau62f52692017-10-08 23:01:42 +02006545
Willy Tarreau0108d902018-11-25 19:14:37 +01006546INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2);
6547
Willy Tarreau62f52692017-10-08 23:01:42 +02006548/* config keyword parsers */
6549static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006550 { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size },
Willy Tarreaue6baec02017-07-27 11:45:11 +02006551 { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size },
Willy Tarreau5242ef82017-07-27 11:47:28 +02006552 { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006553 { CFG_GLOBAL, "tune.h2.max-frame-size", h2_parse_max_frame_size },
Willy Tarreau62f52692017-10-08 23:01:42 +02006554 { 0, NULL, NULL }
6555}};
6556
Willy Tarreau0108d902018-11-25 19:14:37 +01006557INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
Willy Tarreau2bdcc702020-05-19 11:31:11 +02006558
6559/* initialize internal structs after the config is parsed.
6560 * Returns zero on success, non-zero on error.
6561 */
6562static int init_h2()
6563{
6564 pool_head_hpack_tbl = create_pool("hpack_tbl",
6565 h2_settings_header_table_size,
6566 MEM_F_SHARED|MEM_F_EXACT);
Christopher Faulet52140992020-11-06 15:23:39 +01006567 if (!pool_head_hpack_tbl) {
6568 ha_alert("failed to allocate hpack_tbl memory pool\n");
6569 return (ERR_ALERT | ERR_FATAL);
6570 }
6571 return ERR_NONE;
Willy Tarreau2bdcc702020-05-19 11:31:11 +02006572}
6573
6574REGISTER_POST_CHECK(init_h2);