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Willy Tarreau62f52692017-10-08 23:01:42 +02001/*
2 * HTTP/2 mux-demux for connections
3 *
4 * Copyright 2017 Willy Tarreau <w@1wt.eu>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
Willy Tarreaudfd3de82020-06-04 23:46:14 +020013#include <import/eb32tree.h>
Willy Tarreau63617db2021-10-06 18:23:40 +020014#include <import/ebmbtree.h>
Willy Tarreau4c7e4b72020-05-27 12:58:42 +020015#include <haproxy/api.h>
Willy Tarreau6be78492020-06-05 00:00:29 +020016#include <haproxy/cfgparse.h>
Willy Tarreau7ea393d2020-06-04 18:02:10 +020017#include <haproxy/connection.h>
Christopher Faulet6b0a0fb2022-04-04 11:29:28 +020018#include <haproxy/dynbuf.h>
Willy Tarreaubf073142020-06-03 12:04:01 +020019#include <haproxy/h2.h>
Willy Tarreaube327fa2020-06-03 09:09:57 +020020#include <haproxy/hpack-dec.h>
21#include <haproxy/hpack-enc.h>
22#include <haproxy/hpack-tbl.h>
Willy Tarreau87735332020-06-04 09:08:41 +020023#include <haproxy/http_htx.h>
Willy Tarreau16f958c2020-06-03 08:44:35 +020024#include <haproxy/htx.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020025#include <haproxy/istbuf.h>
Willy Tarreau36979d92020-06-05 17:27:29 +020026#include <haproxy/log.h>
Willy Tarreau6c0fadf2022-09-12 19:07:51 +020027#include <haproxy/mux_h2-t.h>
Willy Tarreau6131d6a2020-06-02 16:48:09 +020028#include <haproxy/net_helper.h>
Frédéric Lécaille9969adb2023-01-18 11:52:21 +010029#include <haproxy/proxy.h>
Willy Tarreau48d25b32020-06-04 18:58:52 +020030#include <haproxy/session-t.h>
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +010031#include <haproxy/stats.h>
Willy Tarreaucb086c62022-05-27 09:47:12 +020032#include <haproxy/stconn.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020033#include <haproxy/stream.h>
Willy Tarreauc6d61d72020-06-04 19:02:42 +020034#include <haproxy/trace.h>
Willy Tarreau62f52692017-10-08 23:01:42 +020035
36
Willy Tarreauecb9dcd2019-01-03 12:00:17 +010037/* dummy streams returned for closed, error, refused, idle and states */
Willy Tarreau2a856182017-05-16 15:20:39 +020038static const struct h2s *h2_closed_stream;
Willy Tarreauecb9dcd2019-01-03 12:00:17 +010039static const struct h2s *h2_error_stream;
Willy Tarreau8d0d58b2018-12-23 18:29:12 +010040static const struct h2s *h2_refused_stream;
Willy Tarreau2a856182017-05-16 15:20:39 +020041static const struct h2s *h2_idle_stream;
42
Willy Tarreau5ab6b572017-09-22 08:05:00 +020043
Willy Tarreau6c0fadf2022-09-12 19:07:51 +020044/**** H2 connection descriptor ****/
Willy Tarreau5ab6b572017-09-22 08:05:00 +020045struct h2c {
46 struct connection *conn;
47
48 enum h2_cs st0; /* mux state */
49 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
50
51 /* 16 bit hole here */
52 uint32_t flags; /* connection flags: H2_CF_* */
Willy Tarreau2e2083a2019-01-31 10:34:07 +010053 uint32_t streams_limit; /* maximum number of concurrent streams the peer supports */
Willy Tarreau5ab6b572017-09-22 08:05:00 +020054 int32_t max_id; /* highest ID known on this connection, <0 before preface */
55 uint32_t rcvd_c; /* newly received data to ACK for the connection */
Willy Tarreau617592c2022-06-08 16:32:22 +020056 uint32_t rcvd_s; /* newly received data to ACK for the current stream (dsi) or zero */
Willy Tarreau5ab6b572017-09-22 08:05:00 +020057
58 /* states for the demux direction */
59 struct hpack_dht *ddht; /* demux dynamic header table */
Willy Tarreauc9fa0482018-07-10 17:43:27 +020060 struct buffer dbuf; /* demux buffer */
Willy Tarreau5ab6b572017-09-22 08:05:00 +020061
62 int32_t dsi; /* demux stream ID (<0 = idle) */
63 int32_t dfl; /* demux frame length (if dsi >= 0) */
64 int8_t dft; /* demux frame type (if dsi >= 0) */
65 int8_t dff; /* demux frame flags (if dsi >= 0) */
Willy Tarreau05e5daf2017-12-11 15:17:36 +010066 uint8_t dpl; /* demux pad length (part of dfl), init to 0 */
67 /* 8 bit hole here */
Willy Tarreau5ab6b572017-09-22 08:05:00 +020068 int32_t last_sid; /* last processed stream ID for GOAWAY, <0 before preface */
69
70 /* states for the mux direction */
Willy Tarreau51330962019-05-26 09:38:07 +020071 struct buffer mbuf[H2C_MBUF_CNT]; /* mux buffers (ring) */
Willy Tarreau5ab6b572017-09-22 08:05:00 +020072 int32_t miw; /* mux initial window size for all new streams */
73 int32_t mws; /* mux window size. Can be negative. */
74 int32_t mfs; /* mux's max frame size */
75
Willy Tarreauea392822017-10-31 10:02:25 +010076 int timeout; /* idle timeout duration in ticks */
Willy Tarreau599391a2017-11-24 10:16:00 +010077 int shut_timeout; /* idle timeout duration in ticks after GOAWAY was sent */
Willy Tarreau15a47332022-03-18 15:57:34 +010078 int idle_start; /* date of the last time the connection went idle */
79 /* 32-bit hole here */
Willy Tarreau49745612017-12-03 18:56:02 +010080 unsigned int nb_streams; /* number of streams in the tree */
Willy Tarreau36c22322022-05-27 10:41:24 +020081 unsigned int nb_sc; /* number of attached stream connectors */
Willy Tarreaud64a3eb2019-01-23 10:22:21 +010082 unsigned int nb_reserved; /* number of reserved streams */
Willy Tarreaue9634bd2019-01-23 10:25:10 +010083 unsigned int stream_cnt; /* total number of streams seen */
Willy Tarreau0b37d652018-10-03 10:33:02 +020084 struct proxy *proxy; /* the proxy this connection was created for */
Willy Tarreauea392822017-10-31 10:02:25 +010085 struct task *task; /* timeout management task */
Amaury Denoyellec92697d2020-10-27 17:16:01 +010086 struct h2_counters *px_counters; /* h2 counters attached to proxy */
Willy Tarreau5ab6b572017-09-22 08:05:00 +020087 struct eb_root streams_by_id; /* all active streams by their ID */
88 struct list send_list; /* list of blocked streams requesting to send */
89 struct list fctl_list; /* list of streams blocked by connection's fctl */
Willy Tarreau9edf6db2019-10-02 10:49:59 +020090 struct list blocked_list; /* list of streams blocked for other reasons (e.g. sfctl, dep) */
Willy Tarreau44e973f2018-03-01 17:49:30 +010091 struct buffer_wait buf_wait; /* wait list for buffer allocations */
Olivier Houchardfa8aa862018-10-10 18:25:41 +020092 struct wait_event wait_event; /* To be used if we're waiting for I/Os */
Willy Tarreau5ab6b572017-09-22 08:05:00 +020093};
94
Willy Tarreau2c249eb2019-05-13 18:06:17 +020095
Willy Tarreau18312642017-10-11 07:57:07 +020096/* H2 stream descriptor, describing the stream as it appears in the H2C, and as
Christopher Fauletfafd1b02020-11-03 18:25:52 +010097 * it is being processed in the internal HTTP representation (HTX).
Willy Tarreau18312642017-10-11 07:57:07 +020098 */
99struct h2s {
Willy Tarreau95acc8b2022-05-27 16:14:10 +0200100 struct sedesc *sd;
Olivier Houchardf502aca2018-12-14 19:42:40 +0100101 struct session *sess;
Willy Tarreau18312642017-10-11 07:57:07 +0200102 struct h2c *h2c;
Willy Tarreau18312642017-10-11 07:57:07 +0200103 struct eb32_node by_id; /* place in h2c's streams_by_id */
Willy Tarreau18312642017-10-11 07:57:07 +0200104 int32_t id; /* stream ID */
105 uint32_t flags; /* H2_SF_* */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +0200106 int sws; /* stream window size, to be added to the mux's initial window size */
Willy Tarreau18312642017-10-11 07:57:07 +0200107 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
108 enum h2_ss st;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +0200109 uint16_t status; /* HTTP response status */
Willy Tarreau1915ca22019-01-24 11:49:37 +0100110 unsigned long long body_len; /* remaining body length according to content-length if H2_SF_DATA_CLEN */
Olivier Houchard638b7992018-08-16 15:41:52 +0200111 struct buffer rxbuf; /* receive buffer, always valid (buf_empty or real buffer) */
Willy Tarreau4596fe22022-05-17 19:07:51 +0200112 struct wait_event *subs; /* recv wait_event the stream connector associated is waiting on (via h2_subscribe) */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200113 struct list list; /* To be used when adding in h2c->send_list or h2c->fctl_lsit */
Willy Tarreau5723f292020-01-10 15:16:57 +0100114 struct tasklet *shut_tl; /* deferred shutdown tasklet, to retry to send an RST after we failed to,
115 * in case there's no other subscription to do it */
Amaury Denoyelle74162742020-12-11 17:53:05 +0100116
117 char upgrade_protocol[16]; /* rfc 8441: requested protocol on Extended CONNECT */
Willy Tarreau18312642017-10-11 07:57:07 +0200118};
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200119
Willy Tarreauc6405142017-09-21 20:23:50 +0200120/* descriptor for an h2 frame header */
121struct h2_fh {
122 uint32_t len; /* length, host order, 24 bits */
123 uint32_t sid; /* stream id, host order, 31 bits */
124 uint8_t ft; /* frame type */
125 uint8_t ff; /* frame flags */
126};
127
Willy Tarreau12ae2122019-08-08 18:23:12 +0200128/* trace source and events */
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200129static void h2_trace(enum trace_level level, uint64_t mask, \
130 const struct trace_source *src,
131 const struct ist where, const struct ist func,
132 const void *a1, const void *a2, const void *a3, const void *a4);
Willy Tarreau12ae2122019-08-08 18:23:12 +0200133
134/* The event representation is split like this :
135 * strm - application layer
136 * h2s - internal H2 stream
137 * h2c - internal H2 connection
138 * conn - external connection
139 *
140 */
141static const struct trace_event h2_trace_events[] = {
142#define H2_EV_H2C_NEW (1ULL << 0)
Willy Tarreau87951942019-08-30 07:34:36 +0200143 { .mask = H2_EV_H2C_NEW, .name = "h2c_new", .desc = "new H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200144#define H2_EV_H2C_RECV (1ULL << 1)
Willy Tarreau87951942019-08-30 07:34:36 +0200145 { .mask = H2_EV_H2C_RECV, .name = "h2c_recv", .desc = "Rx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200146#define H2_EV_H2C_SEND (1ULL << 2)
Willy Tarreau87951942019-08-30 07:34:36 +0200147 { .mask = H2_EV_H2C_SEND, .name = "h2c_send", .desc = "Tx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200148#define H2_EV_H2C_FCTL (1ULL << 3)
Willy Tarreau87951942019-08-30 07:34:36 +0200149 { .mask = H2_EV_H2C_FCTL, .name = "h2c_fctl", .desc = "H2 connection flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200150#define H2_EV_H2C_BLK (1ULL << 4)
Willy Tarreau87951942019-08-30 07:34:36 +0200151 { .mask = H2_EV_H2C_BLK, .name = "h2c_blk", .desc = "H2 connection blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200152#define H2_EV_H2C_WAKE (1ULL << 5)
Willy Tarreau87951942019-08-30 07:34:36 +0200153 { .mask = H2_EV_H2C_WAKE, .name = "h2c_wake", .desc = "H2 connection woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200154#define H2_EV_H2C_END (1ULL << 6)
Willy Tarreau87951942019-08-30 07:34:36 +0200155 { .mask = H2_EV_H2C_END, .name = "h2c_end", .desc = "H2 connection terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200156#define H2_EV_H2C_ERR (1ULL << 7)
Willy Tarreau87951942019-08-30 07:34:36 +0200157 { .mask = H2_EV_H2C_ERR, .name = "h2c_err", .desc = "error on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200158#define H2_EV_RX_FHDR (1ULL << 8)
Willy Tarreau87951942019-08-30 07:34:36 +0200159 { .mask = H2_EV_RX_FHDR, .name = "rx_fhdr", .desc = "H2 frame header received" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200160#define H2_EV_RX_FRAME (1ULL << 9)
Willy Tarreau87951942019-08-30 07:34:36 +0200161 { .mask = H2_EV_RX_FRAME, .name = "rx_frame", .desc = "receipt of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200162#define H2_EV_RX_EOI (1ULL << 10)
Willy Tarreau87951942019-08-30 07:34:36 +0200163 { .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 +0200164#define H2_EV_RX_PREFACE (1ULL << 11)
Willy Tarreau87951942019-08-30 07:34:36 +0200165 { .mask = H2_EV_RX_PREFACE, .name = "rx_preface", .desc = "receipt of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200166#define H2_EV_RX_DATA (1ULL << 12)
Willy Tarreau87951942019-08-30 07:34:36 +0200167 { .mask = H2_EV_RX_DATA, .name = "rx_data", .desc = "receipt of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200168#define H2_EV_RX_HDR (1ULL << 13)
Willy Tarreau87951942019-08-30 07:34:36 +0200169 { .mask = H2_EV_RX_HDR, .name = "rx_hdr", .desc = "receipt of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200170#define H2_EV_RX_PRIO (1ULL << 14)
Willy Tarreau87951942019-08-30 07:34:36 +0200171 { .mask = H2_EV_RX_PRIO, .name = "rx_prio", .desc = "receipt of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200172#define H2_EV_RX_RST (1ULL << 15)
Willy Tarreau87951942019-08-30 07:34:36 +0200173 { .mask = H2_EV_RX_RST, .name = "rx_rst", .desc = "receipt of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200174#define H2_EV_RX_SETTINGS (1ULL << 16)
Willy Tarreau87951942019-08-30 07:34:36 +0200175 { .mask = H2_EV_RX_SETTINGS, .name = "rx_settings", .desc = "receipt of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200176#define H2_EV_RX_PUSH (1ULL << 17)
Willy Tarreau87951942019-08-30 07:34:36 +0200177 { .mask = H2_EV_RX_PUSH, .name = "rx_push", .desc = "receipt of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200178#define H2_EV_RX_PING (1ULL << 18)
Willy Tarreau87951942019-08-30 07:34:36 +0200179 { .mask = H2_EV_RX_PING, .name = "rx_ping", .desc = "receipt of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200180#define H2_EV_RX_GOAWAY (1ULL << 19)
Willy Tarreau87951942019-08-30 07:34:36 +0200181 { .mask = H2_EV_RX_GOAWAY, .name = "rx_goaway", .desc = "receipt of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200182#define H2_EV_RX_WU (1ULL << 20)
Willy Tarreau87951942019-08-30 07:34:36 +0200183 { .mask = H2_EV_RX_WU, .name = "rx_wu", .desc = "receipt of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200184#define H2_EV_RX_CONT (1ULL << 21)
Willy Tarreau87951942019-08-30 07:34:36 +0200185 { .mask = H2_EV_RX_CONT, .name = "rx_cont", .desc = "receipt of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200186#define H2_EV_TX_FRAME (1ULL << 22)
Willy Tarreau87951942019-08-30 07:34:36 +0200187 { .mask = H2_EV_TX_FRAME, .name = "tx_frame", .desc = "transmission of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200188#define H2_EV_TX_EOI (1ULL << 23)
Willy Tarreau87951942019-08-30 07:34:36 +0200189 { .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 +0200190#define H2_EV_TX_PREFACE (1ULL << 24)
Willy Tarreau87951942019-08-30 07:34:36 +0200191 { .mask = H2_EV_TX_PREFACE, .name = "tx_preface", .desc = "transmission of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200192#define H2_EV_TX_DATA (1ULL << 25)
Willy Tarreau87951942019-08-30 07:34:36 +0200193 { .mask = H2_EV_TX_DATA, .name = "tx_data", .desc = "transmission of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200194#define H2_EV_TX_HDR (1ULL << 26)
Willy Tarreau87951942019-08-30 07:34:36 +0200195 { .mask = H2_EV_TX_HDR, .name = "tx_hdr", .desc = "transmission of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200196#define H2_EV_TX_PRIO (1ULL << 27)
Willy Tarreau87951942019-08-30 07:34:36 +0200197 { .mask = H2_EV_TX_PRIO, .name = "tx_prio", .desc = "transmission of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200198#define H2_EV_TX_RST (1ULL << 28)
Willy Tarreau87951942019-08-30 07:34:36 +0200199 { .mask = H2_EV_TX_RST, .name = "tx_rst", .desc = "transmission of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200200#define H2_EV_TX_SETTINGS (1ULL << 29)
Willy Tarreau87951942019-08-30 07:34:36 +0200201 { .mask = H2_EV_TX_SETTINGS, .name = "tx_settings", .desc = "transmission of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200202#define H2_EV_TX_PUSH (1ULL << 30)
Willy Tarreau87951942019-08-30 07:34:36 +0200203 { .mask = H2_EV_TX_PUSH, .name = "tx_push", .desc = "transmission of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200204#define H2_EV_TX_PING (1ULL << 31)
Willy Tarreau87951942019-08-30 07:34:36 +0200205 { .mask = H2_EV_TX_PING, .name = "tx_ping", .desc = "transmission of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200206#define H2_EV_TX_GOAWAY (1ULL << 32)
Willy Tarreau87951942019-08-30 07:34:36 +0200207 { .mask = H2_EV_TX_GOAWAY, .name = "tx_goaway", .desc = "transmission of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200208#define H2_EV_TX_WU (1ULL << 33)
Willy Tarreau87951942019-08-30 07:34:36 +0200209 { .mask = H2_EV_TX_WU, .name = "tx_wu", .desc = "transmission of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200210#define H2_EV_TX_CONT (1ULL << 34)
Willy Tarreau87951942019-08-30 07:34:36 +0200211 { .mask = H2_EV_TX_CONT, .name = "tx_cont", .desc = "transmission of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200212#define H2_EV_H2S_NEW (1ULL << 35)
Willy Tarreau87951942019-08-30 07:34:36 +0200213 { .mask = H2_EV_H2S_NEW, .name = "h2s_new", .desc = "new H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200214#define H2_EV_H2S_RECV (1ULL << 36)
Willy Tarreau87951942019-08-30 07:34:36 +0200215 { .mask = H2_EV_H2S_RECV, .name = "h2s_recv", .desc = "Rx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200216#define H2_EV_H2S_SEND (1ULL << 37)
Willy Tarreau87951942019-08-30 07:34:36 +0200217 { .mask = H2_EV_H2S_SEND, .name = "h2s_send", .desc = "Tx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200218#define H2_EV_H2S_FCTL (1ULL << 38)
Willy Tarreau87951942019-08-30 07:34:36 +0200219 { .mask = H2_EV_H2S_FCTL, .name = "h2s_fctl", .desc = "H2 stream flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200220#define H2_EV_H2S_BLK (1ULL << 39)
Willy Tarreau87951942019-08-30 07:34:36 +0200221 { .mask = H2_EV_H2S_BLK, .name = "h2s_blk", .desc = "H2 stream blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200222#define H2_EV_H2S_WAKE (1ULL << 40)
Willy Tarreau87951942019-08-30 07:34:36 +0200223 { .mask = H2_EV_H2S_WAKE, .name = "h2s_wake", .desc = "H2 stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200224#define H2_EV_H2S_END (1ULL << 41)
Willy Tarreau87951942019-08-30 07:34:36 +0200225 { .mask = H2_EV_H2S_END, .name = "h2s_end", .desc = "H2 stream terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200226#define H2_EV_H2S_ERR (1ULL << 42)
Willy Tarreau87951942019-08-30 07:34:36 +0200227 { .mask = H2_EV_H2S_ERR, .name = "h2s_err", .desc = "error on H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200228#define H2_EV_STRM_NEW (1ULL << 43)
Willy Tarreau87951942019-08-30 07:34:36 +0200229 { .mask = H2_EV_STRM_NEW, .name = "strm_new", .desc = "app-layer stream creation" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200230#define H2_EV_STRM_RECV (1ULL << 44)
Willy Tarreau87951942019-08-30 07:34:36 +0200231 { .mask = H2_EV_STRM_RECV, .name = "strm_recv", .desc = "receiving data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200232#define H2_EV_STRM_SEND (1ULL << 45)
Willy Tarreau87951942019-08-30 07:34:36 +0200233 { .mask = H2_EV_STRM_SEND, .name = "strm_send", .desc = "sending data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200234#define H2_EV_STRM_FULL (1ULL << 46)
Willy Tarreau87951942019-08-30 07:34:36 +0200235 { .mask = H2_EV_STRM_FULL, .name = "strm_full", .desc = "stream buffer full" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200236#define H2_EV_STRM_WAKE (1ULL << 47)
Willy Tarreau87951942019-08-30 07:34:36 +0200237 { .mask = H2_EV_STRM_WAKE, .name = "strm_wake", .desc = "stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200238#define H2_EV_STRM_SHUT (1ULL << 48)
Willy Tarreau87951942019-08-30 07:34:36 +0200239 { .mask = H2_EV_STRM_SHUT, .name = "strm_shut", .desc = "stream shutdown" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200240#define H2_EV_STRM_END (1ULL << 49)
Willy Tarreau87951942019-08-30 07:34:36 +0200241 { .mask = H2_EV_STRM_END, .name = "strm_end", .desc = "detaching app-layer stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200242#define H2_EV_STRM_ERR (1ULL << 50)
Willy Tarreau87951942019-08-30 07:34:36 +0200243 { .mask = H2_EV_STRM_ERR, .name = "strm_err", .desc = "stream error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200244#define H2_EV_PROTO_ERR (1ULL << 51)
Willy Tarreau87951942019-08-30 07:34:36 +0200245 { .mask = H2_EV_PROTO_ERR, .name = "proto_err", .desc = "protocol error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200246 { }
247};
248
249static const struct name_desc h2_trace_lockon_args[4] = {
250 /* arg1 */ { /* already used by the connection */ },
251 /* arg2 */ { .name="h2s", .desc="H2 stream" },
252 /* arg3 */ { },
253 /* arg4 */ { }
254};
255
256static const struct name_desc h2_trace_decoding[] = {
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200257#define H2_VERB_CLEAN 1
258 { .name="clean", .desc="only user-friendly stuff, generally suitable for level \"user\"" },
259#define H2_VERB_MINIMAL 2
Willy Tarreau12ae2122019-08-08 18:23:12 +0200260 { .name="minimal", .desc="report only h2c/h2s state and flags, no real decoding" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200261#define H2_VERB_SIMPLE 3
Willy Tarreau12ae2122019-08-08 18:23:12 +0200262 { .name="simple", .desc="add request/response status line or frame info when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200263#define H2_VERB_ADVANCED 4
Willy Tarreau12ae2122019-08-08 18:23:12 +0200264 { .name="advanced", .desc="add header fields or frame decoding when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200265#define H2_VERB_COMPLETE 5
Willy Tarreau12ae2122019-08-08 18:23:12 +0200266 { .name="complete", .desc="add full data dump when available" },
267 { /* end */ }
268};
269
Willy Tarreau6eb3d372021-04-10 19:29:26 +0200270static struct trace_source trace_h2 __read_mostly = {
Willy Tarreau12ae2122019-08-08 18:23:12 +0200271 .name = IST("h2"),
272 .desc = "HTTP/2 multiplexer",
273 .arg_def = TRC_ARG1_CONN, // TRACE()'s first argument is always a connection
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200274 .default_cb = h2_trace,
Willy Tarreau12ae2122019-08-08 18:23:12 +0200275 .known_events = h2_trace_events,
276 .lockon_args = h2_trace_lockon_args,
277 .decoding = h2_trace_decoding,
278 .report_events = ~0, // report everything by default
279};
280
281#define TRACE_SOURCE &trace_h2
282INITCALL1(STG_REGISTER, trace_register_source, TRACE_SOURCE);
283
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100284/* h2 stats module */
285enum {
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100286 H2_ST_HEADERS_RCVD,
287 H2_ST_DATA_RCVD,
288 H2_ST_SETTINGS_RCVD,
289 H2_ST_RST_STREAM_RCVD,
290 H2_ST_GOAWAY_RCVD,
291
Amaury Denoyellea8879232020-10-27 17:16:03 +0100292 H2_ST_CONN_PROTO_ERR,
293 H2_ST_STRM_PROTO_ERR,
294 H2_ST_RST_STREAM_RESP,
295 H2_ST_GOAWAY_RESP,
296
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100297 H2_ST_OPEN_CONN,
298 H2_ST_OPEN_STREAM,
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100299 H2_ST_TOTAL_CONN,
300 H2_ST_TOTAL_STREAM,
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100301
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100302 H2_STATS_COUNT /* must be the last member of the enum */
303};
304
305static struct name_desc h2_stats[] = {
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100306 [H2_ST_HEADERS_RCVD] = { .name = "h2_headers_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100307 .desc = "Total number of received HEADERS frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100308 [H2_ST_DATA_RCVD] = { .name = "h2_data_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100309 .desc = "Total number of received DATA frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100310 [H2_ST_SETTINGS_RCVD] = { .name = "h2_settings_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100311 .desc = "Total number of received SETTINGS frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100312 [H2_ST_RST_STREAM_RCVD] = { .name = "h2_rst_stream_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100313 .desc = "Total number of received RST_STREAM frames" },
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100314 [H2_ST_GOAWAY_RCVD] = { .name = "h2_goaway_rcvd",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100315 .desc = "Total number of received GOAWAY frames" },
Amaury Denoyellea8879232020-10-27 17:16:03 +0100316
317 [H2_ST_CONN_PROTO_ERR] = { .name = "h2_detected_conn_protocol_errors",
318 .desc = "Total number of connection protocol errors" },
319 [H2_ST_STRM_PROTO_ERR] = { .name = "h2_detected_strm_protocol_errors",
320 .desc = "Total number of stream protocol errors" },
321 [H2_ST_RST_STREAM_RESP] = { .name = "h2_rst_stream_resp",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100322 .desc = "Total number of RST_STREAM sent on detected error" },
Amaury Denoyellea8879232020-10-27 17:16:03 +0100323 [H2_ST_GOAWAY_RESP] = { .name = "h2_goaway_resp",
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100324 .desc = "Total number of GOAWAY sent on detected error" },
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100325
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100326 [H2_ST_OPEN_CONN] = { .name = "h2_open_connections",
327 .desc = "Count of currently open connections" },
328 [H2_ST_OPEN_STREAM] = { .name = "h2_backend_open_streams",
329 .desc = "Count of currently open streams" },
Amaury Denoyelle377d8782021-02-03 16:27:22 +0100330 [H2_ST_TOTAL_CONN] = { .name = "h2_total_connections",
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100331 .desc = "Total number of connections" },
Amaury Denoyelle377d8782021-02-03 16:27:22 +0100332 [H2_ST_TOTAL_STREAM] = { .name = "h2_backend_total_streams",
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100333 .desc = "Total number of streams" },
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100334};
335
336static struct h2_counters {
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100337 long long headers_rcvd; /* total number of HEADERS frame received */
338 long long data_rcvd; /* total number of DATA frame received */
339 long long settings_rcvd; /* total number of SETTINGS frame received */
340 long long rst_stream_rcvd; /* total number of RST_STREAM frame received */
341 long long goaway_rcvd; /* total number of GOAWAY frame received */
Amaury Denoyellea8879232020-10-27 17:16:03 +0100342
343 long long conn_proto_err; /* total number of protocol errors detected */
344 long long strm_proto_err; /* total number of protocol errors detected */
Amaury Denoyelle2ac34d92020-11-03 15:04:44 +0100345 long long rst_stream_resp; /* total number of RST_STREAM frame sent on error */
346 long long goaway_resp; /* total number of GOAWAY frame sent on error */
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100347
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100348 long long open_conns; /* count of currently open connections */
349 long long open_streams; /* count of currently open streams */
350 long long total_conns; /* total number of connections */
351 long long total_streams; /* total number of streams */
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100352} h2_counters;
353
354static void h2_fill_stats(void *data, struct field *stats)
355{
Amaury Denoyelle2dec1eb2020-10-27 17:16:02 +0100356 struct h2_counters *counters = data;
357
358 stats[H2_ST_HEADERS_RCVD] = mkf_u64(FN_COUNTER, counters->headers_rcvd);
359 stats[H2_ST_DATA_RCVD] = mkf_u64(FN_COUNTER, counters->data_rcvd);
360 stats[H2_ST_SETTINGS_RCVD] = mkf_u64(FN_COUNTER, counters->settings_rcvd);
361 stats[H2_ST_RST_STREAM_RCVD] = mkf_u64(FN_COUNTER, counters->rst_stream_rcvd);
362 stats[H2_ST_GOAWAY_RCVD] = mkf_u64(FN_COUNTER, counters->goaway_rcvd);
Amaury Denoyellea8879232020-10-27 17:16:03 +0100363
364 stats[H2_ST_CONN_PROTO_ERR] = mkf_u64(FN_COUNTER, counters->conn_proto_err);
365 stats[H2_ST_STRM_PROTO_ERR] = mkf_u64(FN_COUNTER, counters->strm_proto_err);
366 stats[H2_ST_RST_STREAM_RESP] = mkf_u64(FN_COUNTER, counters->rst_stream_resp);
367 stats[H2_ST_GOAWAY_RESP] = mkf_u64(FN_COUNTER, counters->goaway_resp);
Amaury Denoyelle66942c12020-10-27 17:16:04 +0100368
Amaury Denoyellee7b891f2020-11-03 15:04:45 +0100369 stats[H2_ST_OPEN_CONN] = mkf_u64(FN_GAUGE, counters->open_conns);
370 stats[H2_ST_OPEN_STREAM] = mkf_u64(FN_GAUGE, counters->open_streams);
371 stats[H2_ST_TOTAL_CONN] = mkf_u64(FN_COUNTER, counters->total_conns);
372 stats[H2_ST_TOTAL_STREAM] = mkf_u64(FN_COUNTER, counters->total_streams);
Amaury Denoyelle3238b3f2020-10-27 17:16:00 +0100373}
374
375static struct stats_module h2_stats_module = {
376 .name = "h2",
377 .fill_stats = h2_fill_stats,
378 .stats = h2_stats,
379 .stats_count = H2_STATS_COUNT,
380 .counters = &h2_counters,
381 .counters_size = sizeof(h2_counters),
382 .domain_flags = MK_STATS_PROXY_DOMAIN(STATS_PX_CAP_FE|STATS_PX_CAP_BE),
383 .clearable = 1,
384};
385
386INITCALL1(STG_REGISTER, stats_register_module, &h2_stats_module);
387
Willy Tarreau8ceae722018-11-26 11:58:30 +0100388/* the h2c connection pool */
389DECLARE_STATIC_POOL(pool_head_h2c, "h2c", sizeof(struct h2c));
390
391/* the h2s stream pool */
392DECLARE_STATIC_POOL(pool_head_h2s, "h2s", sizeof(struct h2s));
393
Willy Tarreaudc572362018-12-12 08:08:05 +0100394/* The default connection window size is 65535, it may only be enlarged using
395 * a WINDOW_UPDATE message. Since the window must never be larger than 2G-1,
396 * we'll pretend we already received the difference between the two to send
397 * an equivalent window update to enlarge it to 2G-1.
398 */
399#define H2_INITIAL_WINDOW_INCREMENT ((1U<<31)-1 - 65535)
400
Willy Tarreau455d5682019-05-24 19:42:18 +0200401/* maximum amount of data we're OK with re-aligning for buffer optimizations */
402#define MAX_DATA_REALIGN 1024
403
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200404/* a few settings from the global section */
405static int h2_settings_header_table_size = 4096; /* initial value */
Willy Tarreau9d7abda2023-04-17 15:04:34 +0200406static int h2_settings_initial_window_size = 65536; /* default initial value */
407static int h2_be_settings_initial_window_size = 0; /* backend's default initial value */
408static int h2_fe_settings_initial_window_size = 0; /* frontend's default initial value */
Willy Tarreauca1027c2023-04-18 15:57:03 +0200409static unsigned int h2_settings_max_concurrent_streams = 100; /* default value */
410static unsigned int h2_be_settings_max_concurrent_streams = 0; /* backend value */
411static unsigned int h2_fe_settings_max_concurrent_streams = 0; /* frontend value */
Willy Tarreaua24b35c2019-02-21 13:24:36 +0100412static int h2_settings_max_frame_size = 0; /* unset */
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200413
Willy Tarreaub22b5f02022-05-10 14:57:16 +0200414/* a dummy closed endpoint */
Willy Tarreauea59b022022-05-17 17:53:22 +0200415static const struct sedesc closed_ep = {
Willy Tarreauc1054922022-05-18 07:43:52 +0200416 .sc = NULL,
Willy Tarreaub605c422022-05-17 17:04:55 +0200417 .flags = SE_FL_DETACHED,
Willy Tarreaub22b5f02022-05-10 14:57:16 +0200418};
419
Willy Tarreau2a856182017-05-16 15:20:39 +0200420/* a dmumy closed stream */
421static const struct h2s *h2_closed_stream = &(const struct h2s){
Willy Tarreau95acc8b2022-05-27 16:14:10 +0200422 .sd = (struct sedesc *)&closed_ep,
Willy Tarreau2a856182017-05-16 15:20:39 +0200423 .h2c = NULL,
424 .st = H2_SS_CLOSED,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100425 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreauab837502017-12-27 15:07:30 +0100426 .flags = H2_SF_RST_RCVD,
Willy Tarreau2a856182017-05-16 15:20:39 +0200427 .id = 0,
428};
429
Willy Tarreauecb9dcd2019-01-03 12:00:17 +0100430/* a dmumy closed stream returning a PROTOCOL_ERROR error */
431static const struct h2s *h2_error_stream = &(const struct h2s){
Willy Tarreau95acc8b2022-05-27 16:14:10 +0200432 .sd = (struct sedesc *)&closed_ep,
Willy Tarreauecb9dcd2019-01-03 12:00:17 +0100433 .h2c = NULL,
434 .st = H2_SS_CLOSED,
435 .errcode = H2_ERR_PROTOCOL_ERROR,
436 .flags = 0,
437 .id = 0,
438};
439
Willy Tarreau8d0d58b2018-12-23 18:29:12 +0100440/* a dmumy closed stream returning a REFUSED_STREAM error */
441static const struct h2s *h2_refused_stream = &(const struct h2s){
Willy Tarreau95acc8b2022-05-27 16:14:10 +0200442 .sd = (struct sedesc *)&closed_ep,
Willy Tarreau8d0d58b2018-12-23 18:29:12 +0100443 .h2c = NULL,
444 .st = H2_SS_CLOSED,
445 .errcode = H2_ERR_REFUSED_STREAM,
446 .flags = 0,
447 .id = 0,
448};
449
Willy Tarreau2a856182017-05-16 15:20:39 +0200450/* and a dummy idle stream for use with any unannounced stream */
451static const struct h2s *h2_idle_stream = &(const struct h2s){
Willy Tarreau95acc8b2022-05-27 16:14:10 +0200452 .sd = (struct sedesc *)&closed_ep,
Willy Tarreau2a856182017-05-16 15:20:39 +0200453 .h2c = NULL,
454 .st = H2_SS_IDLE,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100455 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreau2a856182017-05-16 15:20:39 +0200456 .id = 0,
457};
458
Willy Tarreau144f84a2021-03-02 16:09:26 +0100459struct task *h2_timeout_task(struct task *t, void *context, unsigned int state);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +0200460static int h2_send(struct h2c *h2c);
461static int h2_recv(struct h2c *h2c);
Olivier Houchard7505f942018-08-21 18:10:44 +0200462static int h2_process(struct h2c *h2c);
Willy Tarreau691d5032021-01-20 14:55:01 +0100463/* h2_io_cb is exported to see it resolved in "show fd" */
Willy Tarreau144f84a2021-03-02 16:09:26 +0100464struct task *h2_io_cb(struct task *t, void *ctx, unsigned int state);
Willy Tarreau0b559072018-02-26 15:22:17 +0100465static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id);
Willy Tarreau7cfbb812023-01-26 16:02:01 +0100466static int h2c_dec_hdrs(struct h2c *h2c, struct buffer *rxbuf, uint32_t *flags, unsigned long long *body_len, char *upgrade_protocol);
Willy Tarreaua56a6de2018-02-26 15:59:07 +0100467static int h2_frt_transfer_data(struct h2s *h2s);
Willy Tarreau144f84a2021-03-02 16:09:26 +0100468struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned int state);
Willy Tarreau36c22322022-05-27 10:41:24 +0200469static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct stconn *sc, struct session *sess);
Willy Tarreau8b2757c2018-12-19 17:36:48 +0100470static void h2s_alert(struct h2s *h2s);
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200471
Willy Tarreau7be4ee02022-05-18 07:31:41 +0200472/* returns the stconn associated to the H2 stream */
473static forceinline struct stconn *h2s_sc(const struct h2s *h2s)
474{
Willy Tarreau95acc8b2022-05-27 16:14:10 +0200475 return h2s->sd->sc;
Willy Tarreau7be4ee02022-05-18 07:31:41 +0200476}
477
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200478/* the H2 traces always expect that arg1, if non-null, is of type connection
479 * (from which we can derive h2c), that arg2, if non-null, is of type h2s, and
480 * that arg3, if non-null, is either of type htx for tx headers, or of type
481 * buffer for everything else.
482 */
483static void h2_trace(enum trace_level level, uint64_t mask, const struct trace_source *src,
484 const struct ist where, const struct ist func,
485 const void *a1, const void *a2, const void *a3, const void *a4)
486{
487 const struct connection *conn = a1;
488 const struct h2c *h2c = conn ? conn->ctx : NULL;
489 const struct h2s *h2s = a2;
490 const struct buffer *buf = a3;
491 const struct htx *htx;
492 int pos;
493
494 if (!h2c) // nothing to add
495 return;
496
Willy Tarreau17104d42019-08-30 07:12:55 +0200497 if (src->verbosity > H2_VERB_CLEAN) {
Willy Tarreau73db4342019-09-25 07:28:44 +0200498 chunk_appendf(&trace_buf, " : h2c=%p(%c,%s)", h2c, conn_is_back(conn) ? 'B' : 'F', h2c_st_to_str(h2c->st0));
499
Willy Tarreau8e6f7492021-06-16 17:47:24 +0200500 if (mask & H2_EV_H2C_NEW) // inside h2_init, otherwise it's hard to match conn & h2c
501 conn_append_debug_info(&trace_buf, conn, " : ");
502
Willy Tarreauf3ce0412019-11-24 14:57:00 +0100503 if (h2c->errcode)
504 chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2c->errcode), h2c->errcode);
505
Willy Tarreau0f458712022-08-18 11:19:57 +0200506 if (h2c->flags & H2_CF_DEM_IN_PROGRESS && // frame processing has started, type and length are valid
Willy Tarreau73db4342019-09-25 07:28:44 +0200507 (mask & (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) == (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) {
Willy Tarreau8520d872020-09-18 07:39:29 +0200508 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 +0200509 }
510
511 if (h2s) {
512 if (h2s->id <= 0)
513 chunk_appendf(&trace_buf, " dsi=%d", h2c->dsi);
Willy Tarreauf9f44992023-02-20 16:57:47 +0100514 if (h2s == h2_idle_stream)
515 chunk_appendf(&trace_buf, " h2s=IDL");
516 else if (h2s != h2_closed_stream)
517 chunk_appendf(&trace_buf, " h2s=%p(%d,%s)", h2s, h2s->id, h2s_st_to_str(h2s->st));
Willy Tarreauf3ce0412019-11-24 14:57:00 +0100518 if (h2s->id && h2s->errcode)
519 chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2s->errcode), h2s->errcode);
Willy Tarreau73db4342019-09-25 07:28:44 +0200520 }
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200521 }
522
523 /* Let's dump decoded requests and responses right after parsing. They
524 * are traced at level USER with a few recognizable flags.
525 */
526 if ((mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW) ||
527 mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR)) && buf)
528 htx = htxbuf(buf); // recv req/res
529 else if (mask == (H2_EV_TX_FRAME|H2_EV_TX_HDR))
530 htx = a3; // send req/res
531 else
532 htx = NULL;
533
Willy Tarreau94f1dcf2019-08-30 07:11:30 +0200534 if (level == TRACE_LEVEL_USER && src->verbosity != H2_VERB_MINIMAL && htx && (pos = htx_get_head(htx)) != -1) {
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200535 const struct htx_blk *blk = htx_get_blk(htx, pos);
536 const struct htx_sl *sl = htx_get_blk_ptr(htx, blk);
537 enum htx_blk_type type = htx_get_blk_type(blk);
538
539 if (type == HTX_BLK_REQ_SL)
540 chunk_appendf(&trace_buf, " : [%d] H2 REQ: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200541 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200542 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
543 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
544 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
545 else if (type == HTX_BLK_RES_SL)
546 chunk_appendf(&trace_buf, " : [%d] H2 RES: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200547 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200548 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
549 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
550 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
551 }
552}
553
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200554
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100555/* Detect a pending read0 for a H2 connection. It happens if a read0 was
556 * already reported on a previous xprt->rcvbuf() AND a frame parser failed
557 * to parse pending data, confirming no more progress is possible because
558 * we're facing a truncated frame. The function returns 1 to report a read0
559 * or 0 otherwise.
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200560 */
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100561static inline int h2c_read0_pending(struct h2c *h2c)
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200562{
Willy Tarreau3d4631f2021-01-20 10:53:13 +0100563 return !!(h2c->flags & H2_CF_END_REACHED);
Christopher Fauletaade4ed2020-10-08 15:38:41 +0200564}
565
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200566/* returns true if the connection is allowed to expire, false otherwise. A
Willy Tarreau34395832022-03-18 14:59:54 +0100567 * connection may expire when it has no attached streams. As long as streams
568 * are attached, the application layer is responsible for timeout management,
569 * and each layer will detach when it doesn't want to wait anymore. When the
570 * last one leaves, the connection must take over timeout management.
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200571 */
572static inline int h2c_may_expire(const struct h2c *h2c)
573{
Willy Tarreau36c22322022-05-27 10:41:24 +0200574 return !h2c->nb_sc;
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200575}
576
Willy Tarreauca1027c2023-04-18 15:57:03 +0200577/* returns the number of max concurrent streams permitted on a connection,
578 * depending on its side (frontend or backend), falling back to the default
579 * h2_settings_max_concurrent_streams. It may even be zero.
580 */
581static inline int h2c_max_concurrent_streams(const struct h2c *h2c)
582{
583 int ret;
584
585 ret = (h2c->flags & H2_CF_IS_BACK) ?
586 h2_be_settings_max_concurrent_streams :
587 h2_fe_settings_max_concurrent_streams;
588
589 ret = ret ? ret : h2_settings_max_concurrent_streams;
590 return ret;
591}
592
593
Willy Tarreau15a47332022-03-18 15:57:34 +0100594/* update h2c timeout if needed */
595static void h2c_update_timeout(struct h2c *h2c)
596{
Remi Tricot-Le Bretonb5d968d2022-04-08 18:04:18 +0200597 int is_idle_conn = 0;
598
Willy Tarreau15a47332022-03-18 15:57:34 +0100599 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
600
601 if (!h2c->task)
602 goto leave;
603
604 if (h2c_may_expire(h2c)) {
605 /* no more streams attached */
Willy Tarreaud38d8c62023-05-15 11:28:48 +0200606 if (br_data(h2c->mbuf)) {
Willy Tarreau15a47332022-03-18 15:57:34 +0100607 /* pending output data: always the regular data timeout */
608 h2c->task->expire = tick_add_ifset(now_ms, h2c->timeout);
Willy Tarreaud38d8c62023-05-15 11:28:48 +0200609 } else {
610 /* no stream, no output data */
611 if (!(h2c->flags & H2_CF_IS_BACK)) {
612 int to;
Willy Tarreau86b08a32022-04-13 17:40:28 +0200613
Willy Tarreaud38d8c62023-05-15 11:28:48 +0200614 if (h2c->max_id > 0 && !b_data(&h2c->dbuf) &&
615 tick_isset(h2c->proxy->timeout.httpka)) {
616 /* idle after having seen one stream => keep-alive */
617 to = h2c->proxy->timeout.httpka;
618 } else {
619 /* before first request, or started to deserialize a
620 * new req => http-request.
621 */
622 to = h2c->proxy->timeout.httpreq;
623 }
Willy Tarreau86b08a32022-04-13 17:40:28 +0200624
Willy Tarreaud38d8c62023-05-15 11:28:48 +0200625 h2c->task->expire = tick_add_ifset(h2c->idle_start, to);
626 is_idle_conn = 1;
627 }
628
629 if (h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED)) {
630 /* GOAWAY sent (or failed), closing in progress */
631 int exp = tick_add_ifset(now_ms, h2c->shut_timeout);
632
633 h2c->task->expire = tick_first(h2c->task->expire, exp);
634 is_idle_conn = 1;
635 }
636
637 /* if a timeout above was not set, fall back to the default one */
638 if (!tick_isset(h2c->task->expire))
639 h2c->task->expire = tick_add_ifset(now_ms, h2c->timeout);
Willy Tarreau15a47332022-03-18 15:57:34 +0100640 }
Remi Tricot-Le Bretonb5d968d2022-04-08 18:04:18 +0200641
642 if ((h2c->proxy->flags & (PR_FL_DISABLED|PR_FL_STOPPED)) &&
643 is_idle_conn && tick_isset(global.close_spread_end)) {
644 /* If a soft-stop is in progress and a close-spread-time
645 * is set, we want to spread idle connection closing roughly
646 * evenly across the defined window. This should only
647 * act on idle frontend connections.
648 * If the window end is already in the past, we wake the
649 * timeout task up immediately so that it can be closed.
650 */
651 int remaining_window = tick_remain(now_ms, global.close_spread_end);
652 if (remaining_window) {
653 /* We don't need to reset the expire if it would
654 * already happen before the close window end.
655 */
656 if (tick_isset(h2c->task->expire) &&
657 tick_is_le(global.close_spread_end, h2c->task->expire)) {
658 /* Set an expire value shorter than the current value
659 * because the close spread window end comes earlier.
660 */
661 h2c->task->expire = tick_add(now_ms, statistical_prng_range(remaining_window));
662 }
663 }
664 else {
665 /* We are past the soft close window end, wake the timeout
666 * task up immediately.
667 */
668 task_wakeup(h2c->task, TASK_WOKEN_TIMER);
669 }
670 }
671
Willy Tarreau15a47332022-03-18 15:57:34 +0100672 } else {
673 h2c->task->expire = TICK_ETERNITY;
674 }
675 task_queue(h2c->task);
676 leave:
677 TRACE_LEAVE(H2_EV_H2C_WAKE);
678}
679
Olivier Houchard7a977432019-03-21 15:47:13 +0100680static __inline int
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200681h2c_is_dead(const struct h2c *h2c)
Olivier Houchard7a977432019-03-21 15:47:13 +0100682{
683 if (eb_is_empty(&h2c->streams_by_id) && /* don't close if streams exist */
Christopher Fauletff7925d2022-10-11 19:12:40 +0200684 ((h2c->flags & H2_CF_ERROR) || /* errors close immediately */
Christopher Faulet21fb6bd2023-03-28 12:16:53 +0200685 (h2c->flags & H2_CF_ERR_PENDING && h2c->st0 < H2_CS_FRAME_H) || /* early error during connect */
Olivier Houchard7a977432019-03-21 15:47:13 +0100686 (h2c->st0 >= H2_CS_ERROR && !h2c->task) || /* a timeout stroke earlier */
687 (!(h2c->conn->owner)) || /* Nobody's left to take care of the connection, drop it now */
Willy Tarreau662fafc2019-05-26 09:43:07 +0200688 (!br_data(h2c->mbuf) && /* mux buffer empty, also process clean events below */
Christopher Fauletff7925d2022-10-11 19:12:40 +0200689 ((h2c->flags & H2_CF_RCVD_SHUT) ||
Olivier Houchard7a977432019-03-21 15:47:13 +0100690 (h2c->last_sid >= 0 && h2c->max_id >= h2c->last_sid)))))
691 return 1;
692
693 return 0;
Olivier Houchard7a977432019-03-21 15:47:13 +0100694}
695
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200696/*****************************************************/
697/* functions below are for dynamic buffer management */
698/*****************************************************/
699
Willy Tarreau315d8072017-12-10 22:17:57 +0100700/* indicates whether or not the we may call the h2_recv() function to attempt
701 * to receive data into the buffer and/or demux pending data. The condition is
702 * a bit complex due to some API limits for now. The rules are the following :
703 * - if an error or a shutdown was detected on the connection and the buffer
704 * is empty, we must not attempt to receive
705 * - if the demux buf failed to be allocated, we must not try to receive and
706 * we know there is nothing pending
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100707 * - if no flag indicates a blocking condition, we may attempt to receive,
708 * regardless of whether the demux buffer is full or not, so that only
709 * de demux part decides whether or not to block. This is needed because
710 * the connection API indeed prevents us from re-enabling receipt that is
711 * already enabled in a polled state, so we must always immediately stop
712 * as soon as the demux can't proceed so as never to hit an end of read
713 * with data pending in the buffers.
Willy Tarreau315d8072017-12-10 22:17:57 +0100714 * - otherwise must may not attempt
715 */
716static inline int h2_recv_allowed(const struct h2c *h2c)
717{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200718 if (b_data(&h2c->dbuf) == 0 &&
Christopher Fauletff7925d2022-10-11 19:12:40 +0200719 ((h2c->flags & (H2_CF_RCVD_SHUT|H2_CF_ERROR)) || h2c->st0 >= H2_CS_ERROR))
Willy Tarreau315d8072017-12-10 22:17:57 +0100720 return 0;
721
722 if (!(h2c->flags & H2_CF_DEM_DALLOC) &&
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100723 !(h2c->flags & H2_CF_DEM_BLOCK_ANY))
Willy Tarreau315d8072017-12-10 22:17:57 +0100724 return 1;
725
726 return 0;
727}
728
Willy Tarreau47b515a2018-12-21 16:09:41 +0100729/* restarts reading on the connection if it was not enabled */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200730static inline void h2c_restart_reading(const struct h2c *h2c, int consider_buffer)
Willy Tarreau47b515a2018-12-21 16:09:41 +0100731{
732 if (!h2_recv_allowed(h2c))
733 return;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200734 if ((!consider_buffer || !b_data(&h2c->dbuf))
735 && (h2c->wait_event.events & SUB_RETRY_RECV))
Willy Tarreau47b515a2018-12-21 16:09:41 +0100736 return;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200737 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau47b515a2018-12-21 16:09:41 +0100738}
739
740
Willy Tarreau4596fe22022-05-17 19:07:51 +0200741/* returns true if the front connection has too many stream connectors attached */
Willy Tarreau36c22322022-05-27 10:41:24 +0200742static inline int h2_frt_has_too_many_sc(const struct h2c *h2c)
Willy Tarreauf2101912018-07-19 10:11:38 +0200743{
Willy Tarreauca1027c2023-04-18 15:57:03 +0200744 return h2c->nb_sc > h2c_max_concurrent_streams(h2c);
Willy Tarreauf2101912018-07-19 10:11:38 +0200745}
746
Willy Tarreau44e973f2018-03-01 17:49:30 +0100747/* Tries to grab a buffer and to re-enable processing on mux <target>. The h2c
748 * flags are used to figure what buffer was requested. It returns 1 if the
749 * allocation succeeds, in which case the connection is woken up, or 0 if it's
750 * impossible to wake up and we prefer to be woken up later.
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200751 */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100752static int h2_buf_available(void *target)
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200753{
754 struct h2c *h2c = target;
Willy Tarreau0b559072018-02-26 15:22:17 +0100755 struct h2s *h2s;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200756
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100757 if ((h2c->flags & H2_CF_DEM_DALLOC) && b_alloc(&h2c->dbuf)) {
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200758 h2c->flags &= ~H2_CF_DEM_DALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200759 h2c_restart_reading(h2c, 1);
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200760 return 1;
761 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200762
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100763 if ((h2c->flags & H2_CF_MUX_MALLOC) && b_alloc(br_tail(h2c->mbuf))) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100764 h2c->flags &= ~H2_CF_MUX_MALLOC;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200765
766 if (h2c->flags & H2_CF_DEM_MROOM) {
767 h2c->flags &= ~H2_CF_DEM_MROOM;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200768 h2c_restart_reading(h2c, 1);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200769 }
Willy Tarreau14398122017-09-22 14:26:04 +0200770 return 1;
771 }
Willy Tarreau0b559072018-02-26 15:22:17 +0100772
773 if ((h2c->flags & H2_CF_DEM_SALLOC) &&
Willy Tarreau7be4ee02022-05-18 07:31:41 +0200774 (h2s = h2c_st_by_id(h2c, h2c->dsi)) && h2s_sc(h2s) &&
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100775 b_alloc(&h2s->rxbuf)) {
Willy Tarreau0b559072018-02-26 15:22:17 +0100776 h2c->flags &= ~H2_CF_DEM_SALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200777 h2c_restart_reading(h2c, 1);
Willy Tarreau0b559072018-02-26 15:22:17 +0100778 return 1;
779 }
780
Willy Tarreau14398122017-09-22 14:26:04 +0200781 return 0;
782}
783
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200784static inline struct buffer *h2_get_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200785{
786 struct buffer *buf = NULL;
787
Willy Tarreau2b718102021-04-21 07:32:39 +0200788 if (likely(!LIST_INLIST(&h2c->buf_wait.list)) &&
Willy Tarreaud68d4f12021-03-22 14:44:31 +0100789 unlikely((buf = b_alloc(bptr)) == NULL)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100790 h2c->buf_wait.target = h2c;
791 h2c->buf_wait.wakeup_cb = h2_buf_available;
Willy Tarreaub4e34762021-09-30 19:02:18 +0200792 LIST_APPEND(&th_ctx->buffer_wq, &h2c->buf_wait.list);
Willy Tarreau14398122017-09-22 14:26:04 +0200793 }
794 return buf;
795}
796
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200797static inline void h2_release_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200798{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200799 if (bptr->size) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100800 b_free(bptr);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +0100801 offer_buffers(NULL, 1);
Willy Tarreau14398122017-09-22 14:26:04 +0200802 }
803}
804
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200805static inline void h2_release_mbuf(struct h2c *h2c)
806{
807 struct buffer *buf;
808 unsigned int count = 0;
809
810 while (b_size(buf = br_head_pick(h2c->mbuf))) {
811 b_free(buf);
812 count++;
813 }
814 if (count)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +0100815 offer_buffers(NULL, count);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200816}
817
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100818/* returns the number of allocatable outgoing streams for the connection taking
819 * the last_sid and the reserved ones into account.
820 */
821static inline int h2_streams_left(const struct h2c *h2c)
822{
823 int ret;
824
825 /* consider the number of outgoing streams we're allowed to create before
826 * reaching the last GOAWAY frame seen. max_id is the last assigned id,
827 * nb_reserved is the number of streams which don't yet have an ID.
828 */
829 ret = (h2c->last_sid >= 0) ? h2c->last_sid : 0x7FFFFFFF;
830 ret = (unsigned int)(ret - h2c->max_id) / 2 - h2c->nb_reserved - 1;
831 if (ret < 0)
832 ret = 0;
833 return ret;
834}
835
Willy Tarreau00f18a32019-01-26 12:19:01 +0100836/* returns the number of streams in use on a connection to figure if it's
Willy Tarreau36c22322022-05-27 10:41:24 +0200837 * idle or not. We check nb_sc and not nb_streams as the caller will want
Willy Tarreau00f18a32019-01-26 12:19:01 +0100838 * to know if it was the last one after a detach().
839 */
840static int h2_used_streams(struct connection *conn)
841{
842 struct h2c *h2c = conn->ctx;
843
Willy Tarreau36c22322022-05-27 10:41:24 +0200844 return h2c->nb_sc;
Willy Tarreau00f18a32019-01-26 12:19:01 +0100845}
846
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100847/* returns the number of concurrent streams available on the connection */
Olivier Houchardd540b362018-11-05 18:37:53 +0100848static int h2_avail_streams(struct connection *conn)
849{
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100850 struct server *srv = objt_server(conn->target);
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100851 struct h2c *h2c = conn->ctx;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100852 int ret1, ret2;
Olivier Houchardd540b362018-11-05 18:37:53 +0100853
Willy Tarreau6afec462019-01-28 06:40:19 +0100854 /* RFC7540#6.8: Receivers of a GOAWAY frame MUST NOT open additional
855 * streams on the connection.
856 */
857 if (h2c->last_sid >= 0)
858 return 0;
859
Willy Tarreauc61966f2019-10-31 15:10:03 +0100860 if (h2c->st0 >= H2_CS_ERROR)
861 return 0;
862
Willy Tarreau86949782019-01-31 10:42:05 +0100863 /* note: may be negative if a SETTINGS frame changes the limit */
864 ret1 = h2c->streams_limit - h2c->nb_streams;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100865
866 /* we must also consider the limit imposed by stream IDs */
867 ret2 = h2_streams_left(h2c);
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100868 ret1 = MIN(ret1, ret2);
Willy Tarreau86949782019-01-31 10:42:05 +0100869 if (ret1 > 0 && srv && srv->max_reuse >= 0) {
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100870 ret2 = h2c->stream_cnt <= srv->max_reuse ? srv->max_reuse - h2c->stream_cnt + 1: 0;
871 ret1 = MIN(ret1, ret2);
872 }
873 return ret1;
Olivier Houchardd540b362018-11-05 18:37:53 +0100874}
875
Ilya Shipitsin07be66d2023-04-01 12:26:42 +0200876/* Unconditionally produce a trace of the header. Please do not call this one
Willy Tarreau11e8a8c2023-01-24 19:43:11 +0100877 * and use h2_trace_header() instead which first checks if traces are enabled.
878 */
879void _h2_trace_header(const struct ist hn, const struct ist hv,
880 uint64_t mask, const struct ist trc_loc, const char *func,
881 const struct h2c *h2c, const struct h2s *h2s)
882{
883 struct ist n_ist, v_ist;
884 const char *c_str, *s_str;
885
886 chunk_reset(&trash);
887 c_str = chunk_newstr(&trash);
888 if (h2c) {
889 chunk_appendf(&trash, "h2c=%p(%c,%s) ",
890 h2c, (h2c->flags & H2_CF_IS_BACK) ? 'B' : 'F', h2c_st_to_str(h2c->st0));
891 }
892
893 s_str = chunk_newstr(&trash);
894 if (h2s) {
895 if (h2s->id <= 0)
896 chunk_appendf(&trash, "dsi=%d ", h2s->h2c->dsi);
897 chunk_appendf(&trash, "h2s=%p(%d,%s) ", h2s, h2s->id, h2s_st_to_str(h2s->st));
898 }
899 else if (h2c)
900 chunk_appendf(&trash, "dsi=%d ", h2c->dsi);
901
902 n_ist = ist2(chunk_newstr(&trash), 0);
903 istscpy(&n_ist, hn, 256);
904 trash.data += n_ist.len;
905 if (n_ist.len != hn.len)
906 chunk_appendf(&trash, " (... +%ld)", (long)(hn.len - n_ist.len));
907
908 v_ist = ist2(chunk_newstr(&trash), 0);
909 istscpy(&v_ist, hv, 1024);
910 trash.data += v_ist.len;
911 if (v_ist.len != hv.len)
912 chunk_appendf(&trash, " (... +%ld)", (long)(hv.len - v_ist.len));
913
914 TRACE_PRINTF_LOC(TRACE_LEVEL_USER, mask, trc_loc, func,
Christopher Fauletc2545162023-01-30 08:26:09 +0100915 (h2c ? h2c->conn : 0), 0, 0, 0,
Willy Tarreau11e8a8c2023-01-24 19:43:11 +0100916 "%s%s%s %s: %s", c_str, s_str,
917 (mask & H2_EV_TX_HDR) ? "sndh" : "rcvh",
918 n_ist.ptr, v_ist.ptr);
919}
920
921/* produce a trace of the header after checking that tracing is enabled */
922static inline void h2_trace_header(const struct ist hn, const struct ist hv,
923 uint64_t mask, const struct ist trc_loc, const char *func,
924 const struct h2c *h2c, const struct h2s *h2s)
925{
926 if ((TRACE_SOURCE)->verbosity >= H2_VERB_ADVANCED &&
927 TRACE_ENABLED(TRACE_LEVEL_USER, mask, h2c ? h2c->conn : 0, h2s, 0, 0))
928 _h2_trace_header(hn, hv, mask, trc_loc, func, h2c, h2s);
929}
930
931/* hpack-encode header name <hn> and value <hv>, possibly emitting a trace if
932 * currently enabled. This is done on behalf of function <func> at <trc_loc>
933 * passed as ist(TRC_LOC), h2c <h2c>, and h2s <h2s>, all of which may be NULL.
934 * The trace is only emitted if the header is emitted (in which case non-zero
935 * is returned). The trash is modified. In the traces, the header's name will
936 * be truncated to 256 chars and the header's value to 1024 chars.
937 */
938static inline int h2_encode_header(struct buffer *buf, const struct ist hn, const struct ist hv,
939 uint64_t mask, const struct ist trc_loc, const char *func,
940 const struct h2c *h2c, const struct h2s *h2s)
941{
942 int ret;
943
944 ret = hpack_encode_header(buf, hn, hv);
945 if (ret)
946 h2_trace_header(hn, hv, mask, trc_loc, func, h2c, h2s);
947
948 return ret;
949}
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200950
Willy Tarreau62f52692017-10-08 23:01:42 +0200951/*****************************************************************/
952/* functions below are dedicated to the mux setup and management */
953/*****************************************************************/
954
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200955/* Initialize the mux once it's attached. For outgoing connections, the context
956 * is already initialized before installing the mux, so we detect incoming
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200957 * connections from the fact that the context is still NULL (even during mux
958 * upgrades). <input> is always used as Input buffer and may contain data. It is
959 * the caller responsibility to not reuse it anymore. Returns < 0 on error.
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200960 */
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200961static int h2_init(struct connection *conn, struct proxy *prx, struct session *sess,
962 struct buffer *input)
Willy Tarreau32218eb2017-09-22 08:07:25 +0200963{
964 struct h2c *h2c;
Willy Tarreauea392822017-10-31 10:02:25 +0100965 struct task *t = NULL;
Christopher Fauletf81ef032019-10-04 15:19:43 +0200966 void *conn_ctx = conn->ctx;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200967
Christopher Fauletf81ef032019-10-04 15:19:43 +0200968 TRACE_ENTER(H2_EV_H2C_NEW);
Willy Tarreau7838a792019-08-12 18:42:03 +0200969
Willy Tarreaubafbe012017-11-24 17:34:44 +0100970 h2c = pool_alloc(pool_head_h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200971 if (!h2c)
mildiscd2d7de2018-10-02 16:44:18 +0200972 goto fail_no_h2c;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200973
Christopher Faulete9b70722019-04-08 10:46:02 +0200974 if (conn_is_back(conn)) {
Willy Tarreau01b44822018-10-03 14:26:37 +0200975 h2c->flags = H2_CF_IS_BACK;
976 h2c->shut_timeout = h2c->timeout = prx->timeout.server;
977 if (tick_isset(prx->timeout.serverfin))
978 h2c->shut_timeout = prx->timeout.serverfin;
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100979
980 h2c->px_counters = EXTRA_COUNTERS_GET(prx->extra_counters_be,
981 &h2_stats_module);
Willy Tarreau01b44822018-10-03 14:26:37 +0200982 } else {
983 h2c->flags = H2_CF_NONE;
984 h2c->shut_timeout = h2c->timeout = prx->timeout.client;
985 if (tick_isset(prx->timeout.clientfin))
986 h2c->shut_timeout = prx->timeout.clientfin;
Amaury Denoyellec92697d2020-10-27 17:16:01 +0100987
988 h2c->px_counters = EXTRA_COUNTERS_GET(prx->extra_counters_fe,
989 &h2_stats_module);
Willy Tarreau01b44822018-10-03 14:26:37 +0200990 }
Willy Tarreau3f133572017-10-31 19:21:06 +0100991
Willy Tarreau0b37d652018-10-03 10:33:02 +0200992 h2c->proxy = prx;
Willy Tarreau33400292017-11-05 11:23:40 +0100993 h2c->task = NULL;
Willy Tarreau389ab0d2023-03-20 19:16:04 +0100994 h2c->wait_event.tasklet = NULL;
Willy Tarreau15a47332022-03-18 15:57:34 +0100995 h2c->idle_start = now_ms;
Willy Tarreau3f133572017-10-31 19:21:06 +0100996 if (tick_isset(h2c->timeout)) {
Willy Tarreaubeeabf52021-10-01 18:23:30 +0200997 t = task_new_here();
Willy Tarreau3f133572017-10-31 19:21:06 +0100998 if (!t)
999 goto fail;
1000
1001 h2c->task = t;
1002 t->process = h2_timeout_task;
1003 t->context = h2c;
1004 t->expire = tick_add(now_ms, h2c->timeout);
1005 }
Willy Tarreauea392822017-10-31 10:02:25 +01001006
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001007 h2c->wait_event.tasklet = tasklet_new();
1008 if (!h2c->wait_event.tasklet)
Olivier Houchard910b2bc2018-07-17 18:49:38 +02001009 goto fail;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001010 h2c->wait_event.tasklet->process = h2_io_cb;
1011 h2c->wait_event.tasklet->context = h2c;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001012 h2c->wait_event.events = 0;
Amaury Denoyelled3a88c12021-05-03 10:47:51 +02001013 if (!conn_is_back(conn)) {
1014 /* Connection might already be in the stopping_list if subject
1015 * to h1->h2 upgrade.
1016 */
1017 if (!LIST_INLIST(&conn->stopping_list)) {
1018 LIST_APPEND(&mux_stopping_data[tid].list,
1019 &conn->stopping_list);
1020 }
1021 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02001022
Willy Tarreau2bdcc702020-05-19 11:31:11 +02001023 h2c->ddht = hpack_dht_alloc();
Willy Tarreau32218eb2017-09-22 08:07:25 +02001024 if (!h2c->ddht)
1025 goto fail;
1026
1027 /* Initialise the context. */
1028 h2c->st0 = H2_CS_PREFACE;
1029 h2c->conn = conn;
Willy Tarreauca1027c2023-04-18 15:57:03 +02001030 h2c->streams_limit = h2c_max_concurrent_streams(h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001031 h2c->max_id = -1;
1032 h2c->errcode = H2_ERR_NO_ERROR;
Willy Tarreau97aaa672018-12-23 09:49:04 +01001033 h2c->rcvd_c = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001034 h2c->rcvd_s = 0;
Willy Tarreau49745612017-12-03 18:56:02 +01001035 h2c->nb_streams = 0;
Willy Tarreau36c22322022-05-27 10:41:24 +02001036 h2c->nb_sc = 0;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001037 h2c->nb_reserved = 0;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001038 h2c->stream_cnt = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001039
Christopher Faulet51f73eb2019-04-08 11:22:47 +02001040 h2c->dbuf = *input;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001041 h2c->dsi = -1;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001042
Willy Tarreau32218eb2017-09-22 08:07:25 +02001043 h2c->last_sid = -1;
1044
Willy Tarreau51330962019-05-26 09:38:07 +02001045 br_init(h2c->mbuf, sizeof(h2c->mbuf) / sizeof(h2c->mbuf[0]));
Willy Tarreau32218eb2017-09-22 08:07:25 +02001046 h2c->miw = 65535; /* mux initial window size */
1047 h2c->mws = 65535; /* mux window size */
1048 h2c->mfs = 16384; /* initial max frame size */
Willy Tarreau751f2d02018-10-05 09:35:00 +02001049 h2c->streams_by_id = EB_ROOT;
Willy Tarreau32218eb2017-09-22 08:07:25 +02001050 LIST_INIT(&h2c->send_list);
1051 LIST_INIT(&h2c->fctl_list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +02001052 LIST_INIT(&h2c->blocked_list);
Willy Tarreau90f366b2021-02-20 11:49:49 +01001053 LIST_INIT(&h2c->buf_wait.list);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001054
Christopher Fauletf81ef032019-10-04 15:19:43 +02001055 conn->ctx = h2c;
1056
Willy Tarreau8e6f7492021-06-16 17:47:24 +02001057 TRACE_USER("new H2 connection", H2_EV_H2C_NEW, conn);
1058
Willy Tarreau3f133572017-10-31 19:21:06 +01001059 if (t)
1060 task_queue(t);
Willy Tarreauea392822017-10-31 10:02:25 +01001061
Willy Tarreau01b44822018-10-03 14:26:37 +02001062 if (h2c->flags & H2_CF_IS_BACK) {
1063 /* FIXME: this is temporary, for outgoing connections we need
1064 * to immediately allocate a stream until the code is modified
Willy Tarreau36c22322022-05-27 10:41:24 +02001065 * so that the caller calls ->attach(). For now the outgoing sc
Christopher Fauletf81ef032019-10-04 15:19:43 +02001066 * is stored as conn->ctx by the caller and saved in conn_ctx.
Willy Tarreau01b44822018-10-03 14:26:37 +02001067 */
1068 struct h2s *h2s;
1069
Christopher Fauletf81ef032019-10-04 15:19:43 +02001070 h2s = h2c_bck_stream_new(h2c, conn_ctx, sess);
Willy Tarreau01b44822018-10-03 14:26:37 +02001071 if (!h2s)
1072 goto fail_stream;
1073 }
1074
Frédéric Lécaille9969adb2023-01-18 11:52:21 +01001075 proxy_inc_fe_cum_sess_ver_ctr(sess->listener, prx, 2);
Willy Tarreau4781b152021-04-06 13:53:36 +02001076 HA_ATOMIC_INC(&h2c->px_counters->open_conns);
1077 HA_ATOMIC_INC(&h2c->px_counters->total_conns);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001078
Willy Tarreau0f383582018-10-03 14:22:21 +02001079 /* prepare to read something */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02001080 h2c_restart_reading(h2c, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001081 TRACE_LEAVE(H2_EV_H2C_NEW, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001082 return 0;
Willy Tarreau01b44822018-10-03 14:26:37 +02001083 fail_stream:
1084 hpack_dht_free(h2c->ddht);
mildiscd2d7de2018-10-02 16:44:18 +02001085 fail:
Willy Tarreauf6562792019-05-07 19:05:35 +02001086 task_destroy(t);
Tim Duesterhusb1ec21d2023-04-22 17:47:32 +02001087 tasklet_free(h2c->wait_event.tasklet);
Willy Tarreaubafbe012017-11-24 17:34:44 +01001088 pool_free(pool_head_h2c, h2c);
mildiscd2d7de2018-10-02 16:44:18 +02001089 fail_no_h2c:
Willy Tarreau3b990fe2022-01-12 17:24:26 +01001090 if (!conn_is_back(conn))
1091 LIST_DEL_INIT(&conn->stopping_list);
Christopher Fauletf81ef032019-10-04 15:19:43 +02001092 conn->ctx = conn_ctx; /* restore saved ctx */
1093 TRACE_DEVEL("leaving in error", H2_EV_H2C_NEW|H2_EV_H2C_END|H2_EV_H2C_ERR);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001094 return -1;
1095}
1096
Willy Tarreau751f2d02018-10-05 09:35:00 +02001097/* returns the next allocatable outgoing stream ID for the H2 connection, or
1098 * -1 if no more is allocatable.
1099 */
1100static inline int32_t h2c_get_next_sid(const struct h2c *h2c)
1101{
1102 int32_t id = (h2c->max_id + 1) | 1;
Willy Tarreaua80dca82019-01-24 17:08:28 +01001103
1104 if ((id & 0x80000000U) || (h2c->last_sid >= 0 && id > h2c->last_sid))
Willy Tarreau751f2d02018-10-05 09:35:00 +02001105 id = -1;
1106 return id;
1107}
1108
Willy Tarreau2373acc2017-10-12 17:35:14 +02001109/* returns the stream associated with id <id> or NULL if not found */
1110static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id)
1111{
1112 struct eb32_node *node;
1113
Willy Tarreau751f2d02018-10-05 09:35:00 +02001114 if (id == 0)
1115 return (struct h2s *)h2_closed_stream;
1116
Willy Tarreau2a856182017-05-16 15:20:39 +02001117 if (id > h2c->max_id)
1118 return (struct h2s *)h2_idle_stream;
1119
Willy Tarreau2373acc2017-10-12 17:35:14 +02001120 node = eb32_lookup(&h2c->streams_by_id, id);
1121 if (!node)
Willy Tarreau2a856182017-05-16 15:20:39 +02001122 return (struct h2s *)h2_closed_stream;
Willy Tarreau2373acc2017-10-12 17:35:14 +02001123
1124 return container_of(node, struct h2s, by_id);
1125}
1126
Christopher Faulet73c12072019-04-08 11:23:22 +02001127/* release function. This one should be called to free all resources allocated
1128 * to the mux.
Willy Tarreau62f52692017-10-08 23:01:42 +02001129 */
Christopher Faulet73c12072019-04-08 11:23:22 +02001130static void h2_release(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02001131{
Christopher Faulet4de1bff2022-04-14 11:36:41 +02001132 struct connection *conn = h2c->conn;
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001133
Willy Tarreau7838a792019-08-12 18:42:03 +02001134 TRACE_ENTER(H2_EV_H2C_END);
1135
Christopher Faulet4de1bff2022-04-14 11:36:41 +02001136 hpack_dht_free(h2c->ddht);
Christopher Faulet61840e72019-04-15 09:33:32 +02001137
Christopher Faulet4de1bff2022-04-14 11:36:41 +02001138 if (LIST_INLIST(&h2c->buf_wait.list))
1139 LIST_DEL_INIT(&h2c->buf_wait.list);
Willy Tarreau14398122017-09-22 14:26:04 +02001140
Christopher Faulet4de1bff2022-04-14 11:36:41 +02001141 h2_release_buf(h2c, &h2c->dbuf);
1142 h2_release_mbuf(h2c);
Willy Tarreau14398122017-09-22 14:26:04 +02001143
Christopher Faulet4de1bff2022-04-14 11:36:41 +02001144 if (h2c->task) {
1145 h2c->task->context = NULL;
1146 task_wakeup(h2c->task, TASK_WOKEN_OTHER);
1147 h2c->task = NULL;
1148 }
Tim Duesterhusb1ec21d2023-04-22 17:47:32 +02001149 tasklet_free(h2c->wait_event.tasklet);
Christopher Faulet4de1bff2022-04-14 11:36:41 +02001150 if (conn && h2c->wait_event.events != 0)
1151 conn->xprt->unsubscribe(conn, conn->xprt_ctx, h2c->wait_event.events,
1152 &h2c->wait_event);
Willy Tarreauea392822017-10-31 10:02:25 +01001153
Christopher Faulet4de1bff2022-04-14 11:36:41 +02001154 HA_ATOMIC_DEC(&h2c->px_counters->open_conns);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001155
Christopher Faulet4de1bff2022-04-14 11:36:41 +02001156 pool_free(pool_head_h2c, h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001157
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001158 if (conn) {
Amaury Denoyelled3a88c12021-05-03 10:47:51 +02001159 if (!conn_is_back(conn))
1160 LIST_DEL_INIT(&conn->stopping_list);
1161
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001162 conn->mux = NULL;
1163 conn->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02001164 TRACE_DEVEL("freeing conn", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +02001165
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001166 conn_stop_tracking(conn);
Willy Tarreau0b222472021-10-21 22:24:31 +02001167
1168 /* there might be a GOAWAY frame still pending in the TCP
1169 * stack, and if the peer continues to send (i.e. window
1170 * updates etc), this can result in losing the GOAWAY. For
1171 * this reason we try to drain anything received in between.
1172 */
1173 conn->flags |= CO_FL_WANT_DRAIN;
1174
1175 conn_xprt_shutw(conn);
1176 conn_xprt_close(conn);
1177 conn_sock_shutw(conn, !conn_is_back(conn));
1178 conn_ctrl_close(conn);
1179
Christopher Faulet39a96ee2019-04-08 10:52:21 +02001180 if (conn->destroy_cb)
1181 conn->destroy_cb(conn);
1182 conn_free(conn);
1183 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001184
1185 TRACE_LEAVE(H2_EV_H2C_END);
Willy Tarreau62f52692017-10-08 23:01:42 +02001186}
1187
1188
Willy Tarreau71681172017-10-23 14:39:06 +02001189/******************************************************/
1190/* functions below are for the H2 protocol processing */
1191/******************************************************/
1192
1193/* returns the stream if of stream <h2s> or 0 if <h2s> is NULL */
Willy Tarreau1f094672017-11-20 21:27:45 +01001194static inline __maybe_unused int h2s_id(const struct h2s *h2s)
Willy Tarreau71681172017-10-23 14:39:06 +02001195{
1196 return h2s ? h2s->id : 0;
1197}
1198
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001199/* returns the sum of the stream's own window size and the mux's initial
1200 * window, which together form the stream's effective window size.
1201 */
1202static inline int h2s_mws(const struct h2s *h2s)
1203{
1204 return h2s->sws + h2s->h2c->miw;
1205}
1206
Willy Tarreau15dbedd2022-04-13 09:40:52 +02001207/* marks an error on the connection. Before settings are sent, we must not send
1208 * a GOAWAY frame, and the error state will prevent h2c_send_goaway_error()
1209 * from verifying this so we set H2_CF_GOAWAY_FAILED to make sure it will not
1210 * even try.
1211 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001212static inline __maybe_unused void h2c_error(struct h2c *h2c, enum h2_err err)
Willy Tarreau741d6df2017-10-17 08:00:59 +02001213{
Willy Tarreau022e5e52020-09-10 09:33:15 +02001214 TRACE_POINT(H2_EV_H2C_ERR, h2c->conn, 0, 0, (void *)(long)(err));
Willy Tarreau741d6df2017-10-17 08:00:59 +02001215 h2c->errcode = err;
Willy Tarreau15dbedd2022-04-13 09:40:52 +02001216 if (h2c->st0 < H2_CS_SETTINGS1)
1217 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau741d6df2017-10-17 08:00:59 +02001218 h2c->st0 = H2_CS_ERROR;
1219}
1220
Willy Tarreau175cebb2019-01-24 10:02:24 +01001221/* marks an error on the stream. It may also update an already closed stream
1222 * (e.g. to report an error after an RST was received).
1223 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001224static inline __maybe_unused void h2s_error(struct h2s *h2s, enum h2_err err)
Willy Tarreau2e43f082017-10-17 08:03:59 +02001225{
Willy Tarreau175cebb2019-01-24 10:02:24 +01001226 if (h2s->id && h2s->st != H2_SS_ERROR) {
Willy Tarreau022e5e52020-09-10 09:33:15 +02001227 TRACE_POINT(H2_EV_H2S_ERR, h2s->h2c->conn, h2s, 0, (void *)(long)(err));
Willy Tarreau2e43f082017-10-17 08:03:59 +02001228 h2s->errcode = err;
Willy Tarreau175cebb2019-01-24 10:02:24 +01001229 if (h2s->st < H2_SS_ERROR)
1230 h2s->st = H2_SS_ERROR;
Willy Tarreau95acc8b2022-05-27 16:14:10 +02001231 se_fl_set_error(h2s->sd);
Willy Tarreau2e43f082017-10-17 08:03:59 +02001232 }
1233}
1234
Willy Tarreau7e094452018-12-19 18:08:52 +01001235/* attempt to notify the data layer of recv availability */
1236static void __maybe_unused h2s_notify_recv(struct h2s *h2s)
1237{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001238 if (h2s->subs && h2s->subs->events & SUB_RETRY_RECV) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001239 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01001240 tasklet_wakeup(h2s->subs->tasklet);
1241 h2s->subs->events &= ~SUB_RETRY_RECV;
1242 if (!h2s->subs->events)
1243 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001244 }
1245}
1246
1247/* attempt to notify the data layer of send availability */
1248static void __maybe_unused h2s_notify_send(struct h2s *h2s)
1249{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001250 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001251 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01001252 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01001253 tasklet_wakeup(h2s->subs->tasklet);
1254 h2s->subs->events &= ~SUB_RETRY_SEND;
1255 if (!h2s->subs->events)
1256 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001257 }
Willy Tarreau5723f292020-01-10 15:16:57 +01001258 else if (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) {
1259 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
1260 tasklet_wakeup(h2s->shut_tl);
1261 }
Willy Tarreau7e094452018-12-19 18:08:52 +01001262}
1263
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001264/* alerts the data layer, trying to wake it up by all means, following
1265 * this sequence :
1266 * - if the h2s' data layer is subscribed to recv, then it's woken up for recv
1267 * - if its subscribed to send, then it's woken up for send
1268 * - if it was subscribed to neither, its ->wake() callback is called
1269 * It is safe to call this function with a closed stream which doesn't have a
Willy Tarreau4596fe22022-05-17 19:07:51 +02001270 * stream connector anymore.
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001271 */
1272static void __maybe_unused h2s_alert(struct h2s *h2s)
1273{
Willy Tarreau7838a792019-08-12 18:42:03 +02001274 TRACE_ENTER(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
1275
Willy Tarreauf96508a2020-01-10 11:12:48 +01001276 if (h2s->subs ||
Willy Tarreau5723f292020-01-10 15:16:57 +01001277 (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW))) {
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001278 h2s_notify_recv(h2s);
1279 h2s_notify_send(h2s);
1280 }
Willy Tarreau2f2318d2022-05-18 10:17:16 +02001281 else if (h2s_sc(h2s) && h2s_sc(h2s)->app_ops->wake != NULL) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001282 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau2f2318d2022-05-18 10:17:16 +02001283 h2s_sc(h2s)->app_ops->wake(h2s_sc(h2s));
Willy Tarreau7838a792019-08-12 18:42:03 +02001284 }
1285
1286 TRACE_LEAVE(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001287}
1288
Willy Tarreaue4820742017-07-27 13:37:23 +02001289/* writes the 24-bit frame size <len> at address <frame> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001290static inline __maybe_unused void h2_set_frame_size(void *frame, uint32_t len)
Willy Tarreaue4820742017-07-27 13:37:23 +02001291{
1292 uint8_t *out = frame;
1293
1294 *out = len >> 16;
1295 write_n16(out + 1, len);
1296}
1297
Willy Tarreau54c15062017-10-10 17:10:03 +02001298/* reads <bytes> bytes from buffer <b> starting at relative offset <o> from the
1299 * current pointer, dealing with wrapping, and stores the result in <dst>. It's
1300 * the caller's responsibility to verify that there are at least <bytes> bytes
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001301 * available in the buffer's input prior to calling this function. The buffer
1302 * is assumed not to hold any output data.
Willy Tarreau54c15062017-10-10 17:10:03 +02001303 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001304static inline __maybe_unused void h2_get_buf_bytes(void *dst, size_t bytes,
Willy Tarreau54c15062017-10-10 17:10:03 +02001305 const struct buffer *b, int o)
1306{
Willy Tarreau591d4452018-06-15 17:21:00 +02001307 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 +02001308}
1309
Willy Tarreau1f094672017-11-20 21:27:45 +01001310static inline __maybe_unused uint16_t h2_get_n16(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001311{
Willy Tarreau591d4452018-06-15 17:21:00 +02001312 return readv_n16(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001313}
1314
Willy Tarreau1f094672017-11-20 21:27:45 +01001315static inline __maybe_unused uint32_t h2_get_n32(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001316{
Willy Tarreau591d4452018-06-15 17:21:00 +02001317 return readv_n32(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001318}
1319
Willy Tarreau1f094672017-11-20 21:27:45 +01001320static inline __maybe_unused uint64_t h2_get_n64(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001321{
Willy Tarreau591d4452018-06-15 17:21:00 +02001322 return readv_n64(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001323}
1324
1325
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001326/* Peeks an H2 frame header from offset <o> of buffer <b> into descriptor <h>.
1327 * The algorithm is not obvious. It turns out that H2 headers are neither
1328 * aligned nor do they use regular sizes. And to add to the trouble, the buffer
1329 * may wrap so each byte read must be checked. The header is formed like this :
Willy Tarreau715d5312017-07-11 15:20:24 +02001330 *
1331 * b0 b1 b2 b3 b4 b5..b8
1332 * +----------+---------+--------+----+----+----------------------+
1333 * |len[23:16]|len[15:8]|len[7:0]|type|flag|sid[31:0] (big endian)|
1334 * +----------+---------+--------+----+----+----------------------+
1335 *
1336 * Here we read a big-endian 64 bit word from h[1]. This way in a single read
1337 * we get the sid properly aligned and ordered, and 16 bits of len properly
1338 * ordered as well. The type and flags can be extracted using bit shifts from
1339 * the word, and only one extra read is needed to fetch len[16:23].
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001340 * Returns zero if some bytes are missing, otherwise non-zero on success. The
1341 * buffer is assumed not to contain any output data.
Willy Tarreau715d5312017-07-11 15:20:24 +02001342 */
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001343static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, int o, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001344{
1345 uint64_t w;
1346
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001347 if (b_data(b) < o + 9)
Willy Tarreau715d5312017-07-11 15:20:24 +02001348 return 0;
1349
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001350 w = h2_get_n64(b, o + 1);
1351 h->len = *(uint8_t*)b_peek(b, o) << 16;
Willy Tarreau715d5312017-07-11 15:20:24 +02001352 h->sid = w & 0x7FFFFFFF; /* RFC7540#4.1: R bit must be ignored */
1353 h->ff = w >> 32;
1354 h->ft = w >> 40;
1355 h->len += w >> 48;
1356 return 1;
1357}
1358
1359/* skip the next 9 bytes corresponding to the frame header possibly parsed by
1360 * h2_peek_frame_hdr() above.
1361 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001362static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b)
Willy Tarreau715d5312017-07-11 15:20:24 +02001363{
Willy Tarreaue5f12ce2018-06-15 10:28:05 +02001364 b_del(b, 9);
Willy Tarreau715d5312017-07-11 15:20:24 +02001365}
1366
1367/* same as above, automatically advances the buffer on success */
Willy Tarreau1f094672017-11-20 21:27:45 +01001368static inline __maybe_unused int h2_get_frame_hdr(struct buffer *b, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001369{
1370 int ret;
1371
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001372 ret = h2_peek_frame_hdr(b, 0, h);
Willy Tarreau715d5312017-07-11 15:20:24 +02001373 if (ret > 0)
1374 h2_skip_frame_hdr(b);
1375 return ret;
1376}
1377
Willy Tarreaucb985a42019-10-07 16:56:34 +02001378
1379/* try to fragment the headers frame present at the beginning of buffer <b>,
1380 * enforcing a limit of <mfs> bytes per frame. Returns 0 on failure, 1 on
1381 * success. Typical causes of failure include a buffer not large enough to
1382 * add extra frame headers. The existing frame size is read in the current
1383 * frame. Its EH flag will be cleared if CONTINUATION frames need to be added,
1384 * and its length will be adjusted. The stream ID for continuation frames will
1385 * be copied from the initial frame's.
1386 */
1387static int h2_fragment_headers(struct buffer *b, uint32_t mfs)
1388{
1389 size_t remain = b->data - 9;
1390 int extra_frames = (remain - 1) / mfs;
1391 size_t fsize;
1392 char *fptr;
1393 int frame;
1394
1395 if (b->data <= mfs + 9)
1396 return 1;
1397
1398 /* Too large a frame, we need to fragment it using CONTINUATION
1399 * frames. We start from the end and move tails as needed.
1400 */
1401 if (b->data + extra_frames * 9 > b->size)
1402 return 0;
1403
1404 for (frame = extra_frames; frame; frame--) {
1405 fsize = ((remain - 1) % mfs) + 1;
1406 remain -= fsize;
1407
1408 /* move data */
1409 fptr = b->area + 9 + remain + (frame - 1) * 9;
1410 memmove(fptr + 9, b->area + 9 + remain, fsize);
1411 b->data += 9;
1412
1413 /* write new frame header */
1414 h2_set_frame_size(fptr, fsize);
1415 fptr[3] = H2_FT_CONTINUATION;
1416 fptr[4] = (frame == extra_frames) ? H2_F_HEADERS_END_HEADERS : 0;
1417 write_n32(fptr + 5, read_n32(b->area + 5));
1418 }
1419
1420 b->area[4] &= ~H2_F_HEADERS_END_HEADERS;
1421 h2_set_frame_size(b->area, remain);
1422 return 1;
1423}
1424
1425
Willy Tarreau00dd0782018-03-01 16:31:34 +01001426/* marks stream <h2s> as CLOSED and decrement the number of active streams for
1427 * its connection if the stream was not yet closed. Please use this exclusively
Willy Tarreaubcdc6cc2023-03-20 19:14:47 +01001428 * before closing a stream to ensure stream count is well maintained. Note that
1429 * it does explicitly support being called with a partially initialized h2s
1430 * (e.g. sd==NULL).
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001431 */
Willy Tarreau00dd0782018-03-01 16:31:34 +01001432static inline void h2s_close(struct h2s *h2s)
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001433{
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001434 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001435 TRACE_ENTER(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001436 h2s->h2c->nb_streams--;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001437 if (!h2s->id)
1438 h2s->h2c->nb_reserved--;
Willy Tarreaubcdc6cc2023-03-20 19:14:47 +01001439 if (h2s->sd && h2s_sc(h2s)) {
Willy Tarreau95acc8b2022-05-27 16:14:10 +02001440 if (!se_fl_test(h2s->sd, SE_FL_EOS) && !b_data(&h2s->rxbuf))
Willy Tarreaua27db382019-03-25 18:13:16 +01001441 h2s_notify_recv(h2s);
1442 }
Willy Tarreau4781b152021-04-06 13:53:36 +02001443 HA_ATOMIC_DEC(&h2s->h2c->px_counters->open_streams);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001444
Willy Tarreau7838a792019-08-12 18:42:03 +02001445 TRACE_LEAVE(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001446 }
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001447 h2s->st = H2_SS_CLOSED;
1448}
1449
Christopher Faulet531dd052023-05-24 11:14:38 +02001450/* Check h2c and h2s flags to evaluate if EOI/EOS/ERR_PENDING/ERROR flags must
1451 * be set on the SE.
1452 */
1453static inline void h2s_propagate_term_flags(struct h2c *h2c, struct h2s *h2s)
1454{
1455 if (h2s->flags & H2_SF_ES_RCVD) {
1456 se_fl_set(h2s->sd, SE_FL_EOI);
1457 /* Add EOS flag for tunnel */
1458 if (h2s->flags & H2_SF_BODY_TUNNEL)
1459 se_fl_set(h2s->sd, SE_FL_EOS);
1460 }
1461 if (h2c_read0_pending(h2c) || h2s->st == H2_SS_CLOSED) {
1462 se_fl_set(h2s->sd, SE_FL_EOS);
1463 if (!se_fl_test(h2s->sd, SE_FL_EOI))
1464 se_fl_set(h2s->sd, SE_FL_ERROR);
1465 }
1466 if (se_fl_test(h2s->sd, SE_FL_ERR_PENDING))
1467 se_fl_set(h2s->sd, SE_FL_ERROR);
1468}
1469
Willy Tarreau71049cc2018-03-28 13:56:39 +02001470/* detaches an H2 stream from its H2C and releases it to the H2S pool. */
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001471/* h2s_destroy should only ever be called by the thread that owns the stream,
1472 * that means that a tasklet should be used if we want to destroy the h2s
1473 * from another thread
1474 */
Willy Tarreau71049cc2018-03-28 13:56:39 +02001475static void h2s_destroy(struct h2s *h2s)
Willy Tarreau0a10de62018-03-01 16:27:53 +01001476{
Willy Tarreau7838a792019-08-12 18:42:03 +02001477 struct connection *conn = h2s->h2c->conn;
1478
1479 TRACE_ENTER(H2_EV_H2S_END, conn, h2s);
1480
Willy Tarreau0a10de62018-03-01 16:27:53 +01001481 h2s_close(h2s);
1482 eb32_delete(&h2s->by_id);
Olivier Houchard638b7992018-08-16 15:41:52 +02001483 if (b_size(&h2s->rxbuf)) {
1484 b_free(&h2s->rxbuf);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01001485 offer_buffers(NULL, 1);
Olivier Houchard638b7992018-08-16 15:41:52 +02001486 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001487
1488 if (h2s->subs)
1489 h2s->subs->events = 0;
1490
Joseph Herlantd77575d2018-11-25 10:54:45 -08001491 /* There's no need to explicitly call unsubscribe here, the only
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001492 * reference left would be in the h2c send_list/fctl_list, and if
1493 * we're in it, we're getting out anyway
1494 */
Olivier Houchardd360ac62019-03-22 17:37:16 +01001495 LIST_DEL_INIT(&h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01001496
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001497 /* ditto, calling tasklet_free() here should be ok */
Willy Tarreau5723f292020-01-10 15:16:57 +01001498 tasklet_free(h2s->shut_tl);
Willy Tarreau95acc8b2022-05-27 16:14:10 +02001499 BUG_ON(h2s->sd && !se_fl_test(h2s->sd, SE_FL_ORPHAN));
1500 sedesc_free(h2s->sd);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001501 pool_free(pool_head_h2s, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001502
1503 TRACE_LEAVE(H2_EV_H2S_END, conn);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001504}
1505
Willy Tarreaua8e49542018-10-03 18:53:55 +02001506/* allocates a new stream <id> for connection <h2c> and adds it into h2c's
1507 * stream tree. In case of error, nothing is added and NULL is returned. The
1508 * causes of errors can be any failed memory allocation. The caller is
1509 * responsible for checking if the connection may support an extra stream
1510 * prior to calling this function.
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001511 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02001512static struct h2s *h2s_new(struct h2c *h2c, int id)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001513{
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001514 struct h2s *h2s;
1515
Willy Tarreau7838a792019-08-12 18:42:03 +02001516 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1517
Willy Tarreaubafbe012017-11-24 17:34:44 +01001518 h2s = pool_alloc(pool_head_h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001519 if (!h2s)
1520 goto out;
1521
Willy Tarreau5723f292020-01-10 15:16:57 +01001522 h2s->shut_tl = tasklet_new();
1523 if (!h2s->shut_tl) {
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001524 pool_free(pool_head_h2s, h2s);
1525 goto out;
1526 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001527 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01001528 h2s->shut_tl->process = h2_deferred_shut;
1529 h2s->shut_tl->context = h2s;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001530 LIST_INIT(&h2s->list);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001531 h2s->h2c = h2c;
Willy Tarreau95acc8b2022-05-27 16:14:10 +02001532 h2s->sd = NULL;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001533 h2s->sws = 0;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001534 h2s->flags = H2_SF_NONE;
1535 h2s->errcode = H2_ERR_NO_ERROR;
1536 h2s->st = H2_SS_IDLE;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02001537 h2s->status = 0;
Willy Tarreau1915ca22019-01-24 11:49:37 +01001538 h2s->body_len = 0;
Olivier Houchard638b7992018-08-16 15:41:52 +02001539 h2s->rxbuf = BUF_NULL;
Amaury Denoyelle74162742020-12-11 17:53:05 +01001540 memset(h2s->upgrade_protocol, 0, sizeof(h2s->upgrade_protocol));
Willy Tarreau751f2d02018-10-05 09:35:00 +02001541
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001542 h2s->by_id.key = h2s->id = id;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001543 if (id > 0)
1544 h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001545 else
1546 h2c->nb_reserved++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001547
1548 eb32_insert(&h2c->streams_by_id, &h2s->by_id);
Willy Tarreau49745612017-12-03 18:56:02 +01001549 h2c->nb_streams++;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001550 h2c->stream_cnt++;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001551
Willy Tarreau4781b152021-04-06 13:53:36 +02001552 HA_ATOMIC_INC(&h2c->px_counters->open_streams);
1553 HA_ATOMIC_INC(&h2c->px_counters->total_streams);
Amaury Denoyelle66942c12020-10-27 17:16:04 +01001554
Willy Tarreau7838a792019-08-12 18:42:03 +02001555 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001556 return h2s;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001557 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001558 TRACE_DEVEL("leaving in error", H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001559 return NULL;
1560}
1561
1562/* creates a new stream <id> on the h2c connection and returns it, or NULL in
Christopher Faulet7d013e72020-12-15 16:56:50 +01001563 * case of memory allocation error. <input> is used as input buffer for the new
1564 * stream. On success, it is transferred to the stream and the mux is no longer
1565 * responsible of it. On error, <input> is unchanged, thus the mux must still
1566 * take care of it.
Willy Tarreaua8e49542018-10-03 18:53:55 +02001567 */
Amaury Denoyelle90ac6052021-10-18 14:45:49 +02001568static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id, struct buffer *input, uint32_t flags)
Willy Tarreaua8e49542018-10-03 18:53:55 +02001569{
1570 struct session *sess = h2c->conn->owner;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001571 struct h2s *h2s;
1572
Willy Tarreau7838a792019-08-12 18:42:03 +02001573 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1574
Willy Tarreauca1027c2023-04-18 15:57:03 +02001575 if (h2c->nb_streams >= h2c_max_concurrent_streams(h2c)) {
Willy Tarreaue872f752022-05-12 09:24:41 +02001576 TRACE_ERROR("HEADERS frame causing MAX_CONCURRENT_STREAMS to be exceeded", H2_EV_H2S_NEW|H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001577 goto out;
Willy Tarreaue872f752022-05-12 09:24:41 +02001578 }
Willy Tarreaua8e49542018-10-03 18:53:55 +02001579
1580 h2s = h2s_new(h2c, id);
1581 if (!h2s)
Willy Tarreaue872f752022-05-12 09:24:41 +02001582 goto out_alloc;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001583
Willy Tarreau95acc8b2022-05-27 16:14:10 +02001584 h2s->sd = sedesc_new();
1585 if (!h2s->sd)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001586 goto out_close;
Willy Tarreau95acc8b2022-05-27 16:14:10 +02001587 h2s->sd->se = h2s;
1588 h2s->sd->conn = h2c->conn;
1589 se_fl_set(h2s->sd, SE_FL_T_MUX | SE_FL_ORPHAN | SE_FL_NOT_FIRST);
Christopher Faulet4403cdf2023-05-04 15:49:12 +02001590 /* The request is not finished, don't expect data from the opposite side
1591 * yet
1592 */
Christopher Faulet78b1eb22023-05-24 11:44:53 +02001593 if (!(h2c->dff & (H2_F_HEADERS_END_STREAM| H2_F_DATA_END_STREAM)) && !(flags & H2_SF_BODY_TUNNEL))
Christopher Faulet4403cdf2023-05-04 15:49:12 +02001594 se_expect_no_data(h2s->sd);
Christopher Faulet9ec2f4d2022-03-23 15:15:29 +01001595
Amaury Denoyelle90ac6052021-10-18 14:45:49 +02001596 /* FIXME wrong analogy between ext-connect and websocket, this need to
1597 * be refine.
1598 */
1599 if (flags & H2_SF_EXT_CONNECT_RCVD)
Willy Tarreau95acc8b2022-05-27 16:14:10 +02001600 se_fl_set(h2s->sd, SE_FL_WEBSOCKET);
Christopher Fauletb669d682022-03-22 18:37:19 +01001601
Willy Tarreaud0de6772022-02-04 09:05:37 +01001602 /* The stream will record the request's accept date (which is either the
1603 * end of the connection's or the date immediately after the previous
1604 * request) and the idle time, which is the delay since the previous
1605 * request. We can set the value now, it will be copied by stream_new().
1606 */
Willy Tarreau69530f52023-04-28 09:16:15 +02001607 sess->t_idle = ns_to_ms(now_ns - sess->accept_ts) - sess->t_handshake;
Christopher Fauleta9e8b392022-03-23 11:01:09 +01001608
Willy Tarreau95acc8b2022-05-27 16:14:10 +02001609 if (!sc_new_from_endp(h2s->sd, sess, input))
Christopher Fauleta9e8b392022-03-23 11:01:09 +01001610 goto out_close;
Willy Tarreaucd6bb1a2022-05-10 15:00:03 +02001611
Willy Tarreau36c22322022-05-27 10:41:24 +02001612 h2c->nb_sc++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001613
Willy Tarreau590a0512018-09-05 11:56:48 +02001614 /* We want the accept date presented to the next stream to be the one
1615 * we have now, the handshake time to be null (since the next stream
1616 * is not delayed by a handshake), and the idle time to count since
1617 * right now.
1618 */
1619 sess->accept_date = date;
Willy Tarreau69530f52023-04-28 09:16:15 +02001620 sess->accept_ts = now_ns;
Willy Tarreau590a0512018-09-05 11:56:48 +02001621 sess->t_handshake = 0;
Willy Tarreaud0de6772022-02-04 09:05:37 +01001622 sess->t_idle = 0;
Willy Tarreau590a0512018-09-05 11:56:48 +02001623
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001624 /* OK done, the stream lives its own life now */
Willy Tarreau36c22322022-05-27 10:41:24 +02001625 if (h2_frt_has_too_many_sc(h2c))
Willy Tarreauf2101912018-07-19 10:11:38 +02001626 h2c->flags |= H2_CF_DEM_TOOMANY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001627 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001628 return h2s;
1629
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001630 out_close:
Willy Tarreau71049cc2018-03-28 13:56:39 +02001631 h2s_destroy(h2s);
Willy Tarreaue872f752022-05-12 09:24:41 +02001632 out_alloc:
1633 TRACE_ERROR("Failed to allocate a new stream", H2_EV_H2S_NEW|H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001634 out:
Willy Tarreau45efc072018-10-03 18:27:52 +02001635 sess_log(sess);
Willy Tarreau7838a792019-08-12 18:42:03 +02001636 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreau45efc072018-10-03 18:27:52 +02001637 return NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001638}
1639
Willy Tarreau36c22322022-05-27 10:41:24 +02001640/* allocates a new stream associated to stream connector <sc> on the h2c
Willy Tarreau4596fe22022-05-17 19:07:51 +02001641 * connection and returns it, or NULL in case of memory allocation error or if
1642 * the highest possible stream ID was reached.
Willy Tarreau751f2d02018-10-05 09:35:00 +02001643 */
Willy Tarreau36c22322022-05-27 10:41:24 +02001644static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct stconn *sc, struct session *sess)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001645{
1646 struct h2s *h2s = NULL;
1647
Willy Tarreau7838a792019-08-12 18:42:03 +02001648 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1649
Willy Tarreaue872f752022-05-12 09:24:41 +02001650 if (h2c->nb_streams >= h2c->streams_limit) {
1651 TRACE_ERROR("Aborting stream since negotiated limit is too low", H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001652 goto out;
Willy Tarreaue872f752022-05-12 09:24:41 +02001653 }
Willy Tarreau751f2d02018-10-05 09:35:00 +02001654
Willy Tarreaue872f752022-05-12 09:24:41 +02001655 if (h2_streams_left(h2c) < 1) {
1656 TRACE_ERROR("Aborting stream since no more streams left", H2_EV_H2S_NEW, h2c->conn);
Willy Tarreaua80dca82019-01-24 17:08:28 +01001657 goto out;
Willy Tarreaue872f752022-05-12 09:24:41 +02001658 }
Willy Tarreaua80dca82019-01-24 17:08:28 +01001659
Willy Tarreau751f2d02018-10-05 09:35:00 +02001660 /* Defer choosing the ID until we send the first message to create the stream */
1661 h2s = h2s_new(h2c, 0);
Willy Tarreaue872f752022-05-12 09:24:41 +02001662 if (!h2s) {
1663 TRACE_ERROR("Failed to allocate a new stream", H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001664 goto out;
Willy Tarreaue872f752022-05-12 09:24:41 +02001665 }
Willy Tarreau751f2d02018-10-05 09:35:00 +02001666
Willy Tarreau36c22322022-05-27 10:41:24 +02001667 if (sc_attach_mux(sc, h2s, h2c->conn) < 0) {
Willy Tarreaue872f752022-05-12 09:24:41 +02001668 TRACE_ERROR("Failed to allocate a new stream", H2_EV_H2S_NEW, h2c->conn);
Christopher Faulet070b91b2022-03-31 19:27:18 +02001669 h2s_destroy(h2s);
1670 h2s = NULL;
1671 goto out;
1672 }
Willy Tarreau95acc8b2022-05-27 16:14:10 +02001673 h2s->sd = sc->sedesc;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001674 h2s->sess = sess;
Willy Tarreau36c22322022-05-27 10:41:24 +02001675 h2c->nb_sc++;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001676
Willy Tarreau751f2d02018-10-05 09:35:00 +02001677 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001678 if (likely(h2s))
1679 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
1680 else
1681 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn, h2s);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001682 return h2s;
1683}
1684
Willy Tarreaube5b7152017-09-25 16:25:39 +02001685/* try to send a settings frame on the connection. Returns > 0 on success, 0 if
1686 * it couldn't do anything. It may return an error in h2c. See RFC7540#11.3 for
1687 * the various settings codes.
1688 */
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001689static int h2c_send_settings(struct h2c *h2c)
Willy Tarreaube5b7152017-09-25 16:25:39 +02001690{
1691 struct buffer *res;
1692 char buf_data[100]; // enough for 15 settings
Willy Tarreau83061a82018-07-13 11:56:34 +02001693 struct buffer buf;
Willy Tarreau9d7abda2023-04-17 15:04:34 +02001694 int iws;
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001695 int mfs;
Willy Tarreauca1027c2023-04-18 15:57:03 +02001696 int mcs;
Willy Tarreau7838a792019-08-12 18:42:03 +02001697 int ret = 0;
1698
1699 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001700
Willy Tarreaube5b7152017-09-25 16:25:39 +02001701 chunk_init(&buf, buf_data, sizeof(buf_data));
1702 chunk_memcpy(&buf,
1703 "\x00\x00\x00" /* length : 0 for now */
1704 "\x04\x00" /* type : 4 (settings), flags : 0 */
1705 "\x00\x00\x00\x00", /* stream ID : 0 */
1706 9);
1707
Willy Tarreau0bbad6b2019-02-26 16:01:52 +01001708 if (h2c->flags & H2_CF_IS_BACK) {
1709 /* send settings_enable_push=0 */
1710 chunk_memcat(&buf, "\x00\x02\x00\x00\x00\x00", 6);
1711 }
1712
Amaury Denoyellebefeae82021-07-09 17:14:30 +02001713 /* rfc 8441 #3 SETTINGS_ENABLE_CONNECT_PROTOCOL=1,
1714 * sent automatically unless disabled in the global config */
1715 if (!(global.tune.options & GTUNE_DISABLE_H2_WEBSOCKET))
1716 chunk_memcat(&buf, "\x00\x08\x00\x00\x00\x01", 6);
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01001717
Willy Tarreaube5b7152017-09-25 16:25:39 +02001718 if (h2_settings_header_table_size != 4096) {
1719 char str[6] = "\x00\x01"; /* header_table_size */
1720
1721 write_n32(str + 2, h2_settings_header_table_size);
1722 chunk_memcat(&buf, str, 6);
1723 }
1724
Willy Tarreau9d7abda2023-04-17 15:04:34 +02001725 iws = (h2c->flags & H2_CF_IS_BACK) ?
1726 h2_be_settings_initial_window_size:
1727 h2_fe_settings_initial_window_size;
1728 iws = iws ? iws : h2_settings_initial_window_size;
1729
1730 if (iws != 65535) {
Willy Tarreaube5b7152017-09-25 16:25:39 +02001731 char str[6] = "\x00\x04"; /* initial_window_size */
1732
Willy Tarreau9d7abda2023-04-17 15:04:34 +02001733 write_n32(str + 2, iws);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001734 chunk_memcat(&buf, str, 6);
1735 }
1736
Willy Tarreauca1027c2023-04-18 15:57:03 +02001737 mcs = h2c_max_concurrent_streams(h2c);
1738 if (mcs != 0) {
Willy Tarreaube5b7152017-09-25 16:25:39 +02001739 char str[6] = "\x00\x03"; /* max_concurrent_streams */
1740
1741 /* Note: 0 means "unlimited" for haproxy's config but not for
1742 * the protocol, so never send this value!
1743 */
Willy Tarreauca1027c2023-04-18 15:57:03 +02001744 write_n32(str + 2, mcs);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001745 chunk_memcat(&buf, str, 6);
1746 }
1747
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001748 mfs = h2_settings_max_frame_size;
1749 if (mfs > global.tune.bufsize)
1750 mfs = global.tune.bufsize;
1751
1752 if (!mfs)
1753 mfs = global.tune.bufsize;
1754
1755 if (mfs != 16384) {
Willy Tarreaube5b7152017-09-25 16:25:39 +02001756 char str[6] = "\x00\x05"; /* max_frame_size */
1757
1758 /* note: similarly we could also emit MAX_HEADER_LIST_SIZE to
1759 * match bufsize - rewrite size, but at the moment it seems
1760 * that clients don't take care of it.
1761 */
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001762 write_n32(str + 2, mfs);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001763 chunk_memcat(&buf, str, 6);
1764 }
1765
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001766 h2_set_frame_size(buf.area, buf.data - 9);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001767
1768 res = br_tail(h2c->mbuf);
1769 retry:
1770 if (!h2_get_buf(h2c, res)) {
1771 h2c->flags |= H2_CF_MUX_MALLOC;
1772 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001773 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001774 }
1775
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001776 ret = b_istput(res, ist2(buf.area, buf.data));
Willy Tarreaube5b7152017-09-25 16:25:39 +02001777 if (unlikely(ret <= 0)) {
1778 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001779 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1780 goto retry;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001781 h2c->flags |= H2_CF_MUX_MFULL;
1782 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001783 }
1784 else {
1785 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001786 ret = 0;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001787 }
1788 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001789 out:
1790 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001791 return ret;
1792}
1793
Willy Tarreau52eed752017-09-22 15:05:09 +02001794/* Try to receive a connection preface, then upon success try to send our
1795 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1796 * missing data. It may return an error in h2c.
1797 */
1798static int h2c_frt_recv_preface(struct h2c *h2c)
1799{
1800 int ret1;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001801 int ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001802
Willy Tarreau7838a792019-08-12 18:42:03 +02001803 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
1804
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001805 ret1 = b_isteq(&h2c->dbuf, 0, b_data(&h2c->dbuf), ist(H2_CONN_PREFACE));
Willy Tarreau52eed752017-09-22 15:05:09 +02001806
1807 if (unlikely(ret1 <= 0)) {
Christopher Fauletb5f7b522021-07-26 12:06:53 +02001808 if (!ret1)
1809 h2c->flags |= H2_CF_DEM_SHORT_READ;
Christopher Fauletff7925d2022-10-11 19:12:40 +02001810 if (ret1 < 0 || (h2c->flags & H2_CF_RCVD_SHUT)) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01001811 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 +02001812 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauee4684f2021-06-17 08:08:48 +02001813 if (b_data(&h2c->dbuf) ||
1814 !(((const struct session *)h2c->conn->owner)->fe->options & PR_O_IGNORE_PRB))
1815 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Amaury Denoyellea8879232020-10-27 17:16:03 +01001816 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001817 ret2 = 0;
1818 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02001819 }
1820
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001821 ret2 = h2c_send_settings(h2c);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001822 if (ret2 > 0)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001823 b_del(&h2c->dbuf, ret1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001824 out:
1825 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001826 return ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001827}
1828
Willy Tarreau01b44822018-10-03 14:26:37 +02001829/* Try to send a connection preface, then upon success try to send our
1830 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1831 * missing data. It may return an error in h2c.
1832 */
1833static int h2c_bck_send_preface(struct h2c *h2c)
1834{
1835 struct buffer *res;
Willy Tarreau7838a792019-08-12 18:42:03 +02001836 int ret = 0;
1837
1838 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02001839
Willy Tarreaubcc45952019-05-26 10:05:50 +02001840 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001841 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001842 if (!h2_get_buf(h2c, res)) {
Willy Tarreau01b44822018-10-03 14:26:37 +02001843 h2c->flags |= H2_CF_MUX_MALLOC;
1844 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001845 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001846 }
1847
1848 if (!b_data(res)) {
1849 /* preface not yet sent */
Willy Tarreau9c218e72019-05-26 10:08:28 +02001850 ret = b_istput(res, ist(H2_CONN_PREFACE));
1851 if (unlikely(ret <= 0)) {
1852 if (!ret) {
1853 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1854 goto retry;
1855 h2c->flags |= H2_CF_MUX_MFULL;
1856 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001857 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001858 }
1859 else {
1860 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001861 ret = 0;
1862 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001863 }
1864 }
Willy Tarreau01b44822018-10-03 14:26:37 +02001865 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001866 ret = h2c_send_settings(h2c);
1867 out:
1868 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
1869 return ret;
Willy Tarreau01b44822018-10-03 14:26:37 +02001870}
1871
Willy Tarreau081d4722017-05-16 21:51:05 +02001872/* try to send a GOAWAY frame on the connection to report an error or a graceful
1873 * shutdown, with h2c->errcode as the error code. Returns > 0 on success or zero
1874 * if nothing was done. It uses h2c->last_sid as the advertised ID, or copies it
1875 * from h2c->max_id if it's not set yet (<0). In case of lack of room to write
1876 * the message, it subscribes the requester (either <h2s> or <h2c>) to future
1877 * notifications. It sets H2_CF_GOAWAY_SENT on success, and H2_CF_GOAWAY_FAILED
1878 * on unrecoverable failure. It will not attempt to send one again in this last
Willy Tarreau15dbedd2022-04-13 09:40:52 +02001879 * case, nor will it send one if settings were not sent (e.g. still waiting for
1880 * a preface) so that it is safe to use h2c_error() to report such errors.
Willy Tarreau081d4722017-05-16 21:51:05 +02001881 */
1882static int h2c_send_goaway_error(struct h2c *h2c, struct h2s *h2s)
1883{
1884 struct buffer *res;
1885 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02001886 int ret = 0;
Willy Tarreau081d4722017-05-16 21:51:05 +02001887
Willy Tarreau7838a792019-08-12 18:42:03 +02001888 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
1889
Willy Tarreau15dbedd2022-04-13 09:40:52 +02001890 if ((h2c->flags & H2_CF_GOAWAY_FAILED) || h2c->st0 < H2_CS_SETTINGS1) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001891 ret = 1; // claim that it worked
1892 goto out;
1893 }
Willy Tarreau081d4722017-05-16 21:51:05 +02001894
Willy Tarreau9c218e72019-05-26 10:08:28 +02001895 /* len: 8, type: 7, flags: none, sid: 0 */
1896 memcpy(str, "\x00\x00\x08\x07\x00\x00\x00\x00\x00", 9);
1897
1898 if (h2c->last_sid < 0)
1899 h2c->last_sid = h2c->max_id;
1900
1901 write_n32(str + 9, h2c->last_sid);
1902 write_n32(str + 13, h2c->errcode);
1903
Willy Tarreaubcc45952019-05-26 10:05:50 +02001904 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001905 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001906 if (!h2_get_buf(h2c, res)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02001907 h2c->flags |= H2_CF_MUX_MALLOC;
1908 if (h2s)
1909 h2s->flags |= H2_SF_BLK_MROOM;
1910 else
1911 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001912 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001913 }
1914
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001915 ret = b_istput(res, ist2(str, 17));
Willy Tarreau081d4722017-05-16 21:51:05 +02001916 if (unlikely(ret <= 0)) {
1917 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001918 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1919 goto retry;
Willy Tarreau081d4722017-05-16 21:51:05 +02001920 h2c->flags |= H2_CF_MUX_MFULL;
1921 if (h2s)
1922 h2s->flags |= H2_SF_BLK_MROOM;
1923 else
1924 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001925 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001926 }
1927 else {
1928 /* we cannot report this error using GOAWAY, so we mark
1929 * it and claim a success.
1930 */
1931 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1932 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau7838a792019-08-12 18:42:03 +02001933 ret = 1;
1934 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001935 }
1936 }
1937 h2c->flags |= H2_CF_GOAWAY_SENT;
Willy Tarreauf965b2a2020-12-01 10:47:18 +01001938
1939 /* some codes are not for real errors, just attempts to close cleanly */
1940 switch (h2c->errcode) {
1941 case H2_ERR_NO_ERROR:
1942 case H2_ERR_ENHANCE_YOUR_CALM:
1943 case H2_ERR_REFUSED_STREAM:
1944 case H2_ERR_CANCEL:
1945 break;
1946 default:
Willy Tarreau4781b152021-04-06 13:53:36 +02001947 HA_ATOMIC_INC(&h2c->px_counters->goaway_resp);
Willy Tarreauf965b2a2020-12-01 10:47:18 +01001948 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001949 out:
1950 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
Willy Tarreau081d4722017-05-16 21:51:05 +02001951 return ret;
1952}
1953
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001954/* Try to send an RST_STREAM frame on the connection for the indicated stream
1955 * during mux operations. This stream must be valid and cannot be closed
1956 * already. h2s->id will be used for the stream ID and h2s->errcode will be
1957 * used for the error code. h2s->st will be update to H2_SS_CLOSED if it was
1958 * not yet.
1959 *
1960 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1961 * to write the message, it subscribes the stream to future notifications.
1962 */
1963static int h2s_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1964{
1965 struct buffer *res;
1966 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001967 int ret = 0;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001968
Willy Tarreau7838a792019-08-12 18:42:03 +02001969 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
1970
1971 if (!h2s || h2s->st == H2_SS_CLOSED) {
1972 ret = 1;
1973 goto out;
1974 }
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001975
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001976 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1977 * RST_STREAM in response to a RST_STREAM frame.
1978 */
Willy Tarreau231f6162019-08-06 10:01:40 +02001979 if (h2c->dsi == h2s->id && h2c->dft == H2_FT_RST_STREAM) {
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001980 ret = 1;
1981 goto ignore;
1982 }
1983
Willy Tarreau9c218e72019-05-26 10:08:28 +02001984 /* len: 4, type: 3, flags: none */
1985 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1986 write_n32(str + 5, h2s->id);
1987 write_n32(str + 9, h2s->errcode);
1988
Willy Tarreaubcc45952019-05-26 10:05:50 +02001989 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001990 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001991 if (!h2_get_buf(h2c, res)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001992 h2c->flags |= H2_CF_MUX_MALLOC;
1993 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001994 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001995 }
1996
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001997 ret = b_istput(res, ist2(str, 13));
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001998 if (unlikely(ret <= 0)) {
1999 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002000 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2001 goto retry;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002002 h2c->flags |= H2_CF_MUX_MFULL;
2003 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002004 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002005 }
2006 else {
2007 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002008 ret = 0;
2009 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002010 }
2011 }
2012
Willy Tarreau8adae7c2018-03-22 17:37:05 +01002013 ignore:
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002014 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01002015 h2s_close(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002016 out:
2017 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002018 return ret;
2019}
2020
2021/* Try to send an RST_STREAM frame on the connection for the stream being
2022 * demuxed using h2c->dsi for the stream ID. It will use h2s->errcode as the
Willy Tarreaue6888ff2018-12-23 18:26:26 +01002023 * error code, even if the stream is one of the dummy ones, and will update
2024 * h2s->st to H2_SS_CLOSED if it was not yet.
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002025 *
2026 * Returns > 0 on success or zero if nothing was done. In case of lack of room
2027 * to write the message, it blocks the demuxer and subscribes it to future
Joseph Herlantd77575d2018-11-25 10:54:45 -08002028 * notifications. It's worth mentioning that an RST may even be sent for a
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002029 * closed stream.
Willy Tarreau27a84c92017-10-17 08:10:17 +02002030 */
2031static int h2c_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
2032{
2033 struct buffer *res;
2034 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002035 int ret = 0;
2036
2037 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02002038
Willy Tarreau8adae7c2018-03-22 17:37:05 +01002039 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
2040 * RST_STREAM in response to a RST_STREAM frame.
2041 */
2042 if (h2c->dft == H2_FT_RST_STREAM) {
2043 ret = 1;
2044 goto ignore;
2045 }
2046
Willy Tarreau9c218e72019-05-26 10:08:28 +02002047 /* len: 4, type: 3, flags: none */
2048 memcpy(str, "\x00\x00\x04\x03\x00", 5);
2049
2050 write_n32(str + 5, h2c->dsi);
2051 write_n32(str + 9, h2s->errcode);
2052
Willy Tarreaubcc45952019-05-26 10:05:50 +02002053 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002054 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002055 if (!h2_get_buf(h2c, res)) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02002056 h2c->flags |= H2_CF_MUX_MALLOC;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002057 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002058 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002059 }
2060
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002061 ret = b_istput(res, ist2(str, 13));
Willy Tarreau27a84c92017-10-17 08:10:17 +02002062 if (unlikely(ret <= 0)) {
2063 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002064 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2065 goto retry;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002066 h2c->flags |= H2_CF_MUX_MFULL;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002067 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002068 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002069 }
2070 else {
2071 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002072 ret = 0;
2073 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002074 }
2075 }
2076
Willy Tarreau8adae7c2018-03-22 17:37:05 +01002077 ignore:
Willy Tarreauab0e1da2018-10-05 10:16:37 +02002078 if (h2s->id) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02002079 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01002080 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01002081 }
2082
Willy Tarreau7838a792019-08-12 18:42:03 +02002083 out:
Willy Tarreau4781b152021-04-06 13:53:36 +02002084 HA_ATOMIC_INC(&h2c->px_counters->rst_stream_resp);
Willy Tarreau7838a792019-08-12 18:42:03 +02002085 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02002086 return ret;
2087}
2088
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002089/* try to send an empty DATA frame with the ES flag set to notify about the
2090 * end of stream and match a shutdown(write). If an ES was already sent as
2091 * indicated by HLOC/ERROR/RESET/CLOSED states, nothing is done. Returns > 0
2092 * on success or zero if nothing was done. In case of lack of room to write the
2093 * message, it subscribes the requesting stream to future notifications.
2094 */
2095static int h2_send_empty_data_es(struct h2s *h2s)
2096{
2097 struct h2c *h2c = h2s->h2c;
2098 struct buffer *res;
2099 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002100 int ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002101
Willy Tarreau7838a792019-08-12 18:42:03 +02002102 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
2103
2104 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED) {
2105 ret = 1;
2106 goto out;
2107 }
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002108
Willy Tarreau9c218e72019-05-26 10:08:28 +02002109 /* len: 0x000000, type: 0(DATA), flags: ES=1 */
2110 memcpy(str, "\x00\x00\x00\x00\x01", 5);
2111 write_n32(str + 5, h2s->id);
2112
Willy Tarreaubcc45952019-05-26 10:05:50 +02002113 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002114 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002115 if (!h2_get_buf(h2c, res)) {
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002116 h2c->flags |= H2_CF_MUX_MALLOC;
2117 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002118 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002119 }
2120
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002121 ret = b_istput(res, ist2(str, 9));
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002122 if (likely(ret > 0)) {
2123 h2s->flags |= H2_SF_ES_SENT;
2124 }
2125 else if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002126 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2127 goto retry;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002128 h2c->flags |= H2_CF_MUX_MFULL;
2129 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01002130 }
2131 else {
2132 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002133 ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002134 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002135 out:
2136 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002137 return ret;
2138}
2139
Willy Tarreau4596fe22022-05-17 19:07:51 +02002140/* wake a specific stream and assign its stream connector some SE_FL_* flags
2141 * among SE_FL_ERR_PENDING and SE_FL_ERROR if needed. The stream's state
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002142 * is automatically updated accordingly. If the stream is orphaned, it is
2143 * destroyed.
Christopher Fauletf02ca002019-03-07 16:21:34 +01002144 */
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002145static void h2s_wake_one_stream(struct h2s *h2s)
Christopher Fauletf02ca002019-03-07 16:21:34 +01002146{
Willy Tarreau7838a792019-08-12 18:42:03 +02002147 struct h2c *h2c = h2s->h2c;
2148
2149 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn, h2s);
2150
Willy Tarreau7be4ee02022-05-18 07:31:41 +02002151 if (!h2s_sc(h2s)) {
Christopher Fauletf02ca002019-03-07 16:21:34 +01002152 /* this stream was already orphaned */
2153 h2s_destroy(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002154 TRACE_DEVEL("leaving with no h2s", H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002155 return;
2156 }
2157
Christopher Fauletaade4ed2020-10-08 15:38:41 +02002158 if (h2c_read0_pending(h2s->h2c)) {
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002159 if (h2s->st == H2_SS_OPEN)
2160 h2s->st = H2_SS_HREM;
2161 else if (h2s->st == H2_SS_HLOC)
2162 h2s_close(h2s);
2163 }
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002164
Christopher Fauletff7925d2022-10-11 19:12:40 +02002165 if (h2s->h2c->st0 >= H2_CS_ERROR || (h2s->h2c->flags & (H2_CF_ERR_PENDING|H2_CF_ERROR)) ||
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002166 (h2s->h2c->last_sid > 0 && (!h2s->id || h2s->id > h2s->h2c->last_sid))) {
Christopher Fauletff7925d2022-10-11 19:12:40 +02002167 se_fl_set_error(h2s->sd);
Willy Tarreau23482912019-05-07 15:23:14 +02002168
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02002169 if (h2s->st < H2_SS_ERROR)
2170 h2s->st = H2_SS_ERROR;
2171 }
Christopher Fauletf02ca002019-03-07 16:21:34 +01002172
2173 h2s_alert(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002174 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002175}
2176
2177/* wake the streams attached to the connection, whose id is greater than <last>
2178 * or unassigned.
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002179 */
Willy Tarreau23482912019-05-07 15:23:14 +02002180static void h2_wake_some_streams(struct h2c *h2c, int last)
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002181{
2182 struct eb32_node *node;
2183 struct h2s *h2s;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002184
Willy Tarreau7838a792019-08-12 18:42:03 +02002185 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn);
2186
Christopher Fauletf02ca002019-03-07 16:21:34 +01002187 /* Wake all streams with ID > last */
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002188 node = eb32_lookup_ge(&h2c->streams_by_id, last + 1);
2189 while (node) {
2190 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002191 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002192 h2s_wake_one_stream(h2s);
Christopher Fauletf02ca002019-03-07 16:21:34 +01002193 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01002194
Christopher Fauletf02ca002019-03-07 16:21:34 +01002195 /* Wake all streams with unassigned ID (ID == 0) */
2196 node = eb32_lookup(&h2c->streams_by_id, 0);
2197 while (node) {
2198 h2s = container_of(node, struct h2s, by_id);
2199 if (h2s->id > 0)
2200 break;
2201 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02002202 h2s_wake_one_stream(h2s);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002203 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002204
2205 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002206}
2207
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002208/* Wake up all blocked streams whose window size has become positive after the
2209 * mux's initial window was adjusted. This should be done after having processed
2210 * SETTINGS frames which have updated the mux's initial window size.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002211 */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002212static void h2c_unblock_sfctl(struct h2c *h2c)
Willy Tarreau3421aba2017-07-27 15:41:03 +02002213{
2214 struct h2s *h2s;
2215 struct eb32_node *node;
2216
Willy Tarreau7838a792019-08-12 18:42:03 +02002217 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
2218
Willy Tarreau3421aba2017-07-27 15:41:03 +02002219 node = eb32_first(&h2c->streams_by_id);
2220 while (node) {
2221 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002222 if (h2s->flags & H2_SF_BLK_SFCTL && h2s_mws(h2s) > 0) {
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002223 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002224 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002225 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2226 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreau2b718102021-04-21 07:32:39 +02002227 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01002228 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002229 node = eb32_next(node);
2230 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002231
2232 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002233}
2234
2235/* processes a SETTINGS frame whose payload is <payload> for <plen> bytes, and
2236 * ACKs it if needed. Returns > 0 on success or zero on missing data. It may
Willy Tarreaub860c732019-01-30 15:39:55 +01002237 * return an error in h2c. The caller must have already verified frame length
2238 * and stream ID validity. Described in RFC7540#6.5.
Willy Tarreau3421aba2017-07-27 15:41:03 +02002239 */
2240static int h2c_handle_settings(struct h2c *h2c)
2241{
2242 unsigned int offset;
2243 int error;
2244
Willy Tarreau7838a792019-08-12 18:42:03 +02002245 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
2246
Willy Tarreau3421aba2017-07-27 15:41:03 +02002247 if (h2c->dff & H2_F_SETTINGS_ACK) {
2248 if (h2c->dfl) {
2249 error = H2_ERR_FRAME_SIZE_ERROR;
2250 goto fail;
2251 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002252 goto done;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002253 }
2254
Willy Tarreau3421aba2017-07-27 15:41:03 +02002255 /* process full frame only */
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002256 if (b_data(&h2c->dbuf) < h2c->dfl) {
2257 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002258 goto out0;
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002259 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002260
2261 /* parse the frame */
2262 for (offset = 0; offset < h2c->dfl; offset += 6) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002263 uint16_t type = h2_get_n16(&h2c->dbuf, offset);
2264 int32_t arg = h2_get_n32(&h2c->dbuf, offset + 2);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002265
2266 switch (type) {
2267 case H2_SETTINGS_INITIAL_WINDOW_SIZE:
2268 /* we need to update all existing streams with the
2269 * difference from the previous iws.
2270 */
2271 if (arg < 0) { // RFC7540#6.5.2
2272 error = H2_ERR_FLOW_CONTROL_ERROR;
2273 goto fail;
2274 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002275 h2c->miw = arg;
2276 break;
2277 case H2_SETTINGS_MAX_FRAME_SIZE:
2278 if (arg < 16384 || arg > 16777215) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002279 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 +02002280 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002281 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002282 goto fail;
2283 }
2284 h2c->mfs = arg;
2285 break;
Willy Tarreau39a0a1e2022-01-13 16:00:12 +01002286 case H2_SETTINGS_HEADER_TABLE_SIZE:
2287 h2c->flags |= H2_CF_SHTS_UPDATED;
2288 break;
Willy Tarreau1b38b462017-12-03 19:02:28 +01002289 case H2_SETTINGS_ENABLE_PUSH:
2290 if (arg < 0 || arg > 1) { // RFC7540#6.5.2
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002291 TRACE_ERROR("ENABLE_PUSH out of range", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002292 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002293 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau1b38b462017-12-03 19:02:28 +01002294 goto fail;
2295 }
2296 break;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01002297 case H2_SETTINGS_MAX_CONCURRENT_STREAMS:
2298 if (h2c->flags & H2_CF_IS_BACK) {
2299 /* the limit is only for the backend; for the frontend it is our limit */
Willy Tarreauca1027c2023-04-18 15:57:03 +02002300 if ((unsigned int)arg > h2c_max_concurrent_streams(h2c))
2301 arg = h2c_max_concurrent_streams(h2c);
Willy Tarreau2e2083a2019-01-31 10:34:07 +01002302 h2c->streams_limit = arg;
2303 }
2304 break;
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01002305 case H2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
Amaury Denoyelle0df04362021-10-18 09:43:29 +02002306 if (arg == 1)
2307 h2c->flags |= H2_CF_RCVD_RFC8441;
Amaury Denoyellef9dcbee2020-12-11 17:53:10 +01002308 break;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002309 }
2310 }
2311
2312 /* need to ACK this frame now */
2313 h2c->st0 = H2_CS_FRAME_A;
Willy Tarreau7838a792019-08-12 18:42:03 +02002314 done:
2315 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002316 return 1;
2317 fail:
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002318 if (!(h2c->flags & H2_CF_IS_BACK))
2319 sess_log(h2c->conn->owner);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002320 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002321 out0:
2322 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 +02002323 return 0;
2324}
2325
2326/* try to send an ACK for a settings frame on the connection. Returns > 0 on
2327 * success or one of the h2_status values.
2328 */
2329static int h2c_ack_settings(struct h2c *h2c)
2330{
2331 struct buffer *res;
2332 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002333 int ret = 0;
2334
2335 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002336
Willy Tarreau9c218e72019-05-26 10:08:28 +02002337 memcpy(str,
2338 "\x00\x00\x00" /* length : 0 (no data) */
2339 "\x04" "\x01" /* type : 4, flags : ACK */
2340 "\x00\x00\x00\x00" /* stream ID */, 9);
2341
Willy Tarreaubcc45952019-05-26 10:05:50 +02002342 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002343 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002344 if (!h2_get_buf(h2c, res)) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02002345 h2c->flags |= H2_CF_MUX_MALLOC;
2346 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002347 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002348 }
2349
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002350 ret = b_istput(res, ist2(str, 9));
Willy Tarreau3421aba2017-07-27 15:41:03 +02002351 if (unlikely(ret <= 0)) {
2352 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002353 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2354 goto retry;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002355 h2c->flags |= H2_CF_MUX_MFULL;
2356 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002357 }
2358 else {
2359 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002360 ret = 0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002361 }
2362 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002363 out:
2364 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002365 return ret;
2366}
2367
Willy Tarreaucf68c782017-10-10 17:11:41 +02002368/* processes a PING frame and schedules an ACK if needed. The caller must pass
2369 * the pointer to the payload in <payload>. Returns > 0 on success or zero on
Willy Tarreaub860c732019-01-30 15:39:55 +01002370 * missing data. The caller must have already verified frame length
2371 * and stream ID validity.
Willy Tarreaucf68c782017-10-10 17:11:41 +02002372 */
2373static int h2c_handle_ping(struct h2c *h2c)
2374{
Willy Tarreaucf68c782017-10-10 17:11:41 +02002375 /* schedule a response */
Willy Tarreau68ed6412017-12-03 18:15:56 +01002376 if (!(h2c->dff & H2_F_PING_ACK))
Willy Tarreaucf68c782017-10-10 17:11:41 +02002377 h2c->st0 = H2_CS_FRAME_A;
2378 return 1;
2379}
2380
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002381/* Try to send a window update for stream id <sid> and value <increment>.
2382 * Returns > 0 on success or zero on missing room or failure. It may return an
2383 * error in h2c.
2384 */
2385static int h2c_send_window_update(struct h2c *h2c, int sid, uint32_t increment)
2386{
2387 struct buffer *res;
2388 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002389 int ret = 0;
2390
2391 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002392
Willy Tarreau9c218e72019-05-26 10:08:28 +02002393 /* length: 4, type: 8, flags: none */
2394 memcpy(str, "\x00\x00\x04\x08\x00", 5);
2395 write_n32(str + 5, sid);
2396 write_n32(str + 9, increment);
2397
Willy Tarreaubcc45952019-05-26 10:05:50 +02002398 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002399 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002400 if (!h2_get_buf(h2c, res)) {
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002401 h2c->flags |= H2_CF_MUX_MALLOC;
2402 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002403 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002404 }
2405
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002406 ret = b_istput(res, ist2(str, 13));
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002407 if (unlikely(ret <= 0)) {
2408 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002409 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2410 goto retry;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002411 h2c->flags |= H2_CF_MUX_MFULL;
2412 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002413 }
2414 else {
2415 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002416 ret = 0;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002417 }
2418 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002419 out:
2420 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002421 return ret;
2422}
2423
2424/* try to send pending window update for the connection. It's safe to call it
2425 * with no pending updates. Returns > 0 on success or zero on missing room or
2426 * failure. It may return an error in h2c.
2427 */
2428static int h2c_send_conn_wu(struct h2c *h2c)
2429{
2430 int ret = 1;
2431
Willy Tarreau7838a792019-08-12 18:42:03 +02002432 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2433
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002434 if (h2c->rcvd_c <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002435 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002436
Willy Tarreau97aaa672018-12-23 09:49:04 +01002437 if (!(h2c->flags & H2_CF_WINDOW_OPENED)) {
2438 /* increase the advertised connection window to 2G on
2439 * first update.
2440 */
2441 h2c->flags |= H2_CF_WINDOW_OPENED;
2442 h2c->rcvd_c += H2_INITIAL_WINDOW_INCREMENT;
2443 }
2444
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002445 /* send WU for the connection */
2446 ret = h2c_send_window_update(h2c, 0, h2c->rcvd_c);
2447 if (ret > 0)
2448 h2c->rcvd_c = 0;
2449
Willy Tarreau7838a792019-08-12 18:42:03 +02002450 out:
2451 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002452 return ret;
2453}
2454
2455/* try to send pending window update for the current dmux stream. It's safe to
2456 * call it with no pending updates. Returns > 0 on success or zero on missing
2457 * room or failure. It may return an error in h2c.
2458 */
2459static int h2c_send_strm_wu(struct h2c *h2c)
2460{
2461 int ret = 1;
2462
Willy Tarreau7838a792019-08-12 18:42:03 +02002463 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2464
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002465 if (h2c->rcvd_s <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002466 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002467
2468 /* send WU for the stream */
2469 ret = h2c_send_window_update(h2c, h2c->dsi, h2c->rcvd_s);
2470 if (ret > 0)
2471 h2c->rcvd_s = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002472 out:
2473 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002474 return ret;
2475}
2476
Willy Tarreaucf68c782017-10-10 17:11:41 +02002477/* try to send an ACK for a ping frame on the connection. Returns > 0 on
2478 * success, 0 on missing data or one of the h2_status values.
2479 */
2480static int h2c_ack_ping(struct h2c *h2c)
2481{
2482 struct buffer *res;
2483 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02002484 int ret = 0;
2485
2486 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002487
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002488 if (b_data(&h2c->dbuf) < 8)
Willy Tarreau7838a792019-08-12 18:42:03 +02002489 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002490
Willy Tarreaucf68c782017-10-10 17:11:41 +02002491 memcpy(str,
2492 "\x00\x00\x08" /* length : 8 (same payload) */
2493 "\x06" "\x01" /* type : 6, flags : ACK */
2494 "\x00\x00\x00\x00" /* stream ID */, 9);
2495
2496 /* copy the original payload */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002497 h2_get_buf_bytes(str + 9, 8, &h2c->dbuf, 0);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002498
Willy Tarreau9c218e72019-05-26 10:08:28 +02002499 res = br_tail(h2c->mbuf);
2500 retry:
2501 if (!h2_get_buf(h2c, res)) {
2502 h2c->flags |= H2_CF_MUX_MALLOC;
2503 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002504 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02002505 }
2506
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002507 ret = b_istput(res, ist2(str, 17));
Willy Tarreaucf68c782017-10-10 17:11:41 +02002508 if (unlikely(ret <= 0)) {
2509 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002510 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2511 goto retry;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002512 h2c->flags |= H2_CF_MUX_MFULL;
2513 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002514 }
2515 else {
2516 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002517 ret = 0;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002518 }
2519 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002520 out:
2521 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002522 return ret;
2523}
2524
Willy Tarreau26f95952017-07-27 17:18:30 +02002525/* processes a WINDOW_UPDATE frame whose payload is <payload> for <plen> bytes.
2526 * Returns > 0 on success or zero on missing data. It may return an error in
Willy Tarreaub860c732019-01-30 15:39:55 +01002527 * h2c or h2s. The caller must have already verified frame length and stream ID
2528 * validity. Described in RFC7540#6.9.
Willy Tarreau26f95952017-07-27 17:18:30 +02002529 */
2530static int h2c_handle_window_update(struct h2c *h2c, struct h2s *h2s)
2531{
2532 int32_t inc;
2533 int error;
2534
Willy Tarreau7838a792019-08-12 18:42:03 +02002535 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
2536
Willy Tarreau26f95952017-07-27 17:18:30 +02002537 /* process full frame only */
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002538 if (b_data(&h2c->dbuf) < h2c->dfl) {
2539 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002540 goto out0;
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002541 }
Willy Tarreau26f95952017-07-27 17:18:30 +02002542
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002543 inc = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau26f95952017-07-27 17:18:30 +02002544
2545 if (h2c->dsi != 0) {
2546 /* stream window update */
Willy Tarreau26f95952017-07-27 17:18:30 +02002547
2548 /* it's not an error to receive WU on a closed stream */
2549 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau7838a792019-08-12 18:42:03 +02002550 goto done;
Willy Tarreau26f95952017-07-27 17:18:30 +02002551
2552 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002553 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 +02002554 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002555 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002556 goto strm_err;
2557 }
2558
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002559 if (h2s_mws(h2s) >= 0 && h2s_mws(h2s) + inc < 0) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002560 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 +02002561 error = H2_ERR_FLOW_CONTROL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002562 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002563 goto strm_err;
2564 }
2565
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002566 h2s->sws += inc;
2567 if (h2s_mws(h2s) > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002568 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002569 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002570 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2571 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreau2b718102021-04-21 07:32:39 +02002572 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreau26f95952017-07-27 17:18:30 +02002573 }
2574 }
2575 else {
2576 /* connection window update */
2577 if (!inc) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002578 TRACE_ERROR("conn WINDOW_UPDATE inc=0", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002579 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002580 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau26f95952017-07-27 17:18:30 +02002581 goto conn_err;
2582 }
2583
2584 if (h2c->mws >= 0 && h2c->mws + inc < 0) {
2585 error = H2_ERR_FLOW_CONTROL_ERROR;
2586 goto conn_err;
2587 }
2588
2589 h2c->mws += inc;
2590 }
2591
Willy Tarreau7838a792019-08-12 18:42:03 +02002592 done:
2593 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002594 return 1;
2595
2596 conn_err:
2597 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002598 out0:
2599 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 +02002600 return 0;
2601
2602 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002603 h2s_error(h2s, error);
2604 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002605 TRACE_DEVEL("leaving on stream error", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002606 return 0;
2607}
2608
Willy Tarreaue96b0922017-10-30 00:28:29 +01002609/* processes a GOAWAY frame, and signals all streams whose ID is greater than
Willy Tarreaub860c732019-01-30 15:39:55 +01002610 * the last ID. Returns > 0 on success or zero on missing data. The caller must
2611 * have already verified frame length and stream ID validity. Described in
2612 * RFC7540#6.8.
Willy Tarreaue96b0922017-10-30 00:28:29 +01002613 */
2614static int h2c_handle_goaway(struct h2c *h2c)
2615{
Willy Tarreaue96b0922017-10-30 00:28:29 +01002616 int last;
2617
Willy Tarreau7838a792019-08-12 18:42:03 +02002618 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002619 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002620 if (b_data(&h2c->dbuf) < h2c->dfl) {
2621 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002622 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002623 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002624 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01002625
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002626 last = h2_get_n32(&h2c->dbuf, 0);
2627 h2c->errcode = h2_get_n32(&h2c->dbuf, 4);
Willy Tarreau11cc2d62017-12-03 10:27:47 +01002628 if (h2c->last_sid < 0)
2629 h2c->last_sid = last;
Willy Tarreau23482912019-05-07 15:23:14 +02002630 h2_wake_some_streams(h2c, last);
Willy Tarreau7838a792019-08-12 18:42:03 +02002631 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002632 return 1;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002633}
2634
Willy Tarreau92153fc2017-12-03 19:46:19 +01002635/* processes a PRIORITY frame, and either skips it or rejects if it is
Willy Tarreaub860c732019-01-30 15:39:55 +01002636 * invalid. Returns > 0 on success or zero on missing data. It may return an
2637 * error in h2c. The caller must have already verified frame length and stream
2638 * ID validity. Described in RFC7540#6.3.
Willy Tarreau92153fc2017-12-03 19:46:19 +01002639 */
2640static int h2c_handle_priority(struct h2c *h2c)
2641{
Willy Tarreau7838a792019-08-12 18:42:03 +02002642 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
2643
Willy Tarreau92153fc2017-12-03 19:46:19 +01002644 /* process full frame only */
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002645 if (b_data(&h2c->dbuf) < h2c->dfl) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002646 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002647 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002648 return 0;
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002649 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01002650
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002651 if (h2_get_n32(&h2c->dbuf, 0) == h2c->dsi) {
Willy Tarreau92153fc2017-12-03 19:46:19 +01002652 /* 7540#5.3 : can't depend on itself */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002653 TRACE_ERROR("PRIORITY depends on itself", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002654 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02002655 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002656 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002657 return 0;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002658 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002659 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002660 return 1;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002661}
2662
Willy Tarreaucd234e92017-08-18 10:59:39 +02002663/* processes an RST_STREAM frame, and sets the 32-bit error code on the stream.
Willy Tarreaub860c732019-01-30 15:39:55 +01002664 * Returns > 0 on success or zero on missing data. The caller must have already
2665 * verified frame length and stream ID validity. Described in RFC7540#6.4.
Willy Tarreaucd234e92017-08-18 10:59:39 +02002666 */
2667static int h2c_handle_rst_stream(struct h2c *h2c, struct h2s *h2s)
2668{
Willy Tarreau7838a792019-08-12 18:42:03 +02002669 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
2670
Willy Tarreaucd234e92017-08-18 10:59:39 +02002671 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002672 if (b_data(&h2c->dbuf) < h2c->dfl) {
2673 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002674 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002675 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002676 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002677
2678 /* late RST, already handled */
Willy Tarreau7838a792019-08-12 18:42:03 +02002679 if (h2s->st == H2_SS_CLOSED) {
2680 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 +02002681 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002682 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002683
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002684 h2s->errcode = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau00dd0782018-03-01 16:31:34 +01002685 h2s_close(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002686
Willy Tarreau7be4ee02022-05-18 07:31:41 +02002687 if (h2s_sc(h2s)) {
Willy Tarreau95acc8b2022-05-27 16:14:10 +02002688 se_fl_set_error(h2s->sd);
Willy Tarreauf830f012018-12-19 17:44:55 +01002689 h2s_alert(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002690 }
2691
2692 h2s->flags |= H2_SF_RST_RCVD;
Willy Tarreau7838a792019-08-12 18:42:03 +02002693 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002694 return 1;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002695}
2696
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002697/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2698 * It may return an error in h2c or h2s. The caller must consider that the
2699 * return value is the new h2s in case one was allocated (most common case).
2700 * Described in RFC7540#6.2. Most of the
Willy Tarreau13278b42017-10-13 19:23:14 +02002701 * errors here are reported as connection errors since it's impossible to
2702 * recover from such errors after the compression context has been altered.
2703 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002704static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau13278b42017-10-13 19:23:14 +02002705{
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002706 struct buffer rxbuf = BUF_NULL;
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002707 unsigned long long body_len = 0;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002708 uint32_t flags = 0;
Willy Tarreau13278b42017-10-13 19:23:14 +02002709 int error;
2710
Willy Tarreau7838a792019-08-12 18:42:03 +02002711 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2712
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002713 if (!b_size(&h2c->dbuf)) {
2714 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002715 goto out; // empty buffer
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002716 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002717
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002718 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2719 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002720 goto out; // incomplete frame
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002721 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002722
2723 /* now either the frame is complete or the buffer is complete */
2724 if (h2s->st != H2_SS_IDLE) {
Willy Tarreau88d138e2019-01-02 19:38:14 +01002725 /* The stream exists/existed, this must be a trailers frame */
2726 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreau7cfbb812023-01-26 16:02:01 +01002727 error = h2c_dec_hdrs(h2c, &h2s->rxbuf, &h2s->flags, &body_len, NULL);
Willy Tarreauaab1a602019-05-06 11:12:18 +02002728 /* unrecoverable error ? */
Willy Tarreauf43f36d2023-01-19 23:22:03 +01002729 if (h2c->st0 >= H2_CS_ERROR) {
Willy Tarreau17c630b2023-01-19 23:58:11 +01002730 TRACE_USER("Unrecoverable error decoding H2 trailers", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn, 0, &rxbuf);
Willy Tarreauf43f36d2023-01-19 23:22:03 +01002731 sess_log(h2c->conn->owner);
Willy Tarreauaab1a602019-05-06 11:12:18 +02002732 goto out;
Willy Tarreauf43f36d2023-01-19 23:22:03 +01002733 }
Willy Tarreauaab1a602019-05-06 11:12:18 +02002734
Christopher Faulet485da0b2021-10-08 08:56:00 +02002735 if (error == 0) {
2736 /* Demux not blocked because of the stream, it is an incomplete frame */
2737 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2738 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002739 goto out; // missing data
Christopher Faulet485da0b2021-10-08 08:56:00 +02002740 }
Willy Tarreauaab1a602019-05-06 11:12:18 +02002741
2742 if (error < 0) {
2743 /* Failed to decode this frame (e.g. too large request)
2744 * but the HPACK decompressor is still synchronized.
2745 */
Willy Tarreauf43f36d2023-01-19 23:22:03 +01002746 sess_log(h2c->conn->owner);
Willy Tarreauaab1a602019-05-06 11:12:18 +02002747 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
Willy Tarreau17c630b2023-01-19 23:58:11 +01002748 TRACE_USER("Stream error decoding H2 trailers", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn, 0, &rxbuf);
Willy Tarreauaab1a602019-05-06 11:12:18 +02002749 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau88d138e2019-01-02 19:38:14 +01002750 goto out;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002751 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01002752 goto done;
2753 }
Willy Tarreau1f035502019-01-30 11:44:07 +01002754 /* the connection was already killed by an RST, let's consume
2755 * the data and send another RST.
2756 */
Willy Tarreau7cfbb812023-01-26 16:02:01 +01002757 error = h2c_dec_hdrs(h2c, &rxbuf, &flags, &body_len, NULL);
Willy Tarreauf43f36d2023-01-19 23:22:03 +01002758 sess_log(h2c->conn->owner);
Willy Tarreau1f035502019-01-30 11:44:07 +01002759 h2s = (struct h2s*)h2_error_stream;
2760 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002761 }
2762 else if (h2c->dsi <= h2c->max_id || !(h2c->dsi & 1)) {
2763 /* RFC7540#5.1.1 stream id > prev ones, and must be odd here */
2764 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002765 TRACE_ERROR("HEADERS on invalid stream ID", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau4781b152021-04-06 13:53:36 +02002766 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau22de8d32018-09-05 19:55:58 +02002767 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02002768 goto conn_err;
2769 }
Willy Tarreau415b1ee2019-01-02 13:59:43 +01002770 else if (h2c->flags & H2_CF_DEM_TOOMANY)
Willy Tarreau36c22322022-05-27 10:41:24 +02002771 goto out; // IDLE but too many sc still present
Willy Tarreau13278b42017-10-13 19:23:14 +02002772
Willy Tarreau7cfbb812023-01-26 16:02:01 +01002773 error = h2c_dec_hdrs(h2c, &rxbuf, &flags, &body_len, NULL);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002774
Willy Tarreau25919232019-01-03 14:48:18 +01002775 /* unrecoverable error ? */
Willy Tarreauf43f36d2023-01-19 23:22:03 +01002776 if (h2c->st0 >= H2_CS_ERROR) {
Willy Tarreau17c630b2023-01-19 23:58:11 +01002777 TRACE_USER("Unrecoverable error decoding H2 request", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn, 0, &rxbuf);
Willy Tarreauf43f36d2023-01-19 23:22:03 +01002778 sess_log(h2c->conn->owner);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002779 goto out;
Willy Tarreauf43f36d2023-01-19 23:22:03 +01002780 }
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002781
Willy Tarreau25919232019-01-03 14:48:18 +01002782 if (error <= 0) {
Christopher Faulet485da0b2021-10-08 08:56:00 +02002783 if (error == 0) {
2784 /* Demux not blocked because of the stream, it is an incomplete frame */
2785 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2786 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau25919232019-01-03 14:48:18 +01002787 goto out; // missing data
Christopher Faulet485da0b2021-10-08 08:56:00 +02002788 }
Willy Tarreau25919232019-01-03 14:48:18 +01002789
2790 /* Failed to decode this stream (e.g. too large request)
2791 * but the HPACK decompressor is still synchronized.
2792 */
Willy Tarreauf43f36d2023-01-19 23:22:03 +01002793 sess_log(h2c->conn->owner);
Willy Tarreau25919232019-01-03 14:48:18 +01002794 h2s = (struct h2s*)h2_error_stream;
2795 goto send_rst;
2796 }
2797
Willy Tarreau29268e92021-06-17 08:29:14 +02002798 TRACE_USER("rcvd H2 request ", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW, h2c->conn, 0, &rxbuf);
2799
Willy Tarreau198b5072022-05-12 09:08:51 +02002800 /* Now we cannot roll back and we won't come back here anymore for this
2801 * stream, this stream ID is open.
2802 */
2803 if (h2c->dsi > h2c->max_id)
2804 h2c->max_id = h2c->dsi;
2805
Willy Tarreau22de8d32018-09-05 19:55:58 +02002806 /* Note: we don't emit any other logs below because ff we return
Willy Tarreaua8e49542018-10-03 18:53:55 +02002807 * positively from h2c_frt_stream_new(), the stream will report the error,
2808 * and if we return in error, h2c_frt_stream_new() will emit the error.
Christopher Faulet7d013e72020-12-15 16:56:50 +01002809 *
2810 * Xfer the rxbuf to the stream. On success, the new stream owns the
2811 * rxbuf. On error, it is released here.
Willy Tarreau22de8d32018-09-05 19:55:58 +02002812 */
Amaury Denoyelle90ac6052021-10-18 14:45:49 +02002813 h2s = h2c_frt_stream_new(h2c, h2c->dsi, &rxbuf, flags);
Willy Tarreau13278b42017-10-13 19:23:14 +02002814 if (!h2s) {
Willy Tarreau96a10c22018-12-23 18:30:44 +01002815 h2s = (struct h2s*)h2_refused_stream;
2816 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002817 }
2818
2819 h2s->st = H2_SS_OPEN;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002820 h2s->flags |= flags;
Willy Tarreau1915ca22019-01-24 11:49:37 +01002821 h2s->body_len = body_len;
Christopher Fauletc2f1d0e2023-05-24 11:34:45 +02002822 h2s_propagate_term_flags(h2c, h2s);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002823
Willy Tarreau88d138e2019-01-02 19:38:14 +01002824 done:
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002825 if (h2s->flags & H2_SF_ES_RCVD) {
Willy Tarreaufc10f592019-01-30 19:28:32 +01002826 if (h2s->st == H2_SS_OPEN)
2827 h2s->st = H2_SS_HREM;
2828 else
2829 h2s_close(h2s);
Willy Tarreau13278b42017-10-13 19:23:14 +02002830 }
Willy Tarreau0d6e5d22023-02-20 17:05:10 +01002831 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002832 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002833
2834 conn_err:
2835 h2c_error(h2c, error);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002836 goto out;
Willy Tarreau13278b42017-10-13 19:23:14 +02002837
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002838 out:
2839 h2_release_buf(h2c, &rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002840 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 +01002841 return NULL;
Willy Tarreau96a10c22018-12-23 18:30:44 +01002842
2843 send_rst:
2844 /* make the demux send an RST for the current stream. We may only
2845 * do this if we're certain that the HEADERS frame was properly
2846 * decompressed so that the HPACK decoder is still kept up to date.
2847 */
2848 h2_release_buf(h2c, &rxbuf);
2849 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002850
Willy Tarreau022e5e52020-09-10 09:33:15 +02002851 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 +02002852 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau96a10c22018-12-23 18:30:44 +01002853 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002854}
2855
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002856/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2857 * It may return an error in h2c or h2s. Described in RFC7540#6.2. Most of the
2858 * errors here are reported as connection errors since it's impossible to
2859 * recover from such errors after the compression context has been altered.
2860 */
2861static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
2862{
Christopher Faulet6884aa32019-09-23 15:28:20 +02002863 struct buffer rxbuf = BUF_NULL;
2864 unsigned long long body_len = 0;
2865 uint32_t flags = 0;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002866 int error;
2867
Willy Tarreau7838a792019-08-12 18:42:03 +02002868 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2869
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002870 if (!b_size(&h2c->dbuf)) {
2871 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002872 goto fail; // empty buffer
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002873 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002874
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002875 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2876 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002877 goto fail; // incomplete frame
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002878 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002879
Christopher Faulet6884aa32019-09-23 15:28:20 +02002880 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreau7cfbb812023-01-26 16:02:01 +01002881 error = h2c_dec_hdrs(h2c, &h2s->rxbuf, &h2s->flags, &h2s->body_len, h2s->upgrade_protocol);
Christopher Faulet6884aa32019-09-23 15:28:20 +02002882 }
2883 else {
2884 /* the connection was already killed by an RST, let's consume
2885 * the data and send another RST.
2886 */
Willy Tarreau7cfbb812023-01-26 16:02:01 +01002887 error = h2c_dec_hdrs(h2c, &rxbuf, &flags, &body_len, NULL);
Christopher Fauletea7a7782019-09-26 16:19:13 +02002888 h2s = (struct h2s*)h2_error_stream;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002889 h2c->st0 = H2_CS_FRAME_E;
2890 goto send_rst;
2891 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002892
Willy Tarreau25919232019-01-03 14:48:18 +01002893 /* unrecoverable error ? */
Willy Tarreau17c630b2023-01-19 23:58:11 +01002894 if (h2c->st0 >= H2_CS_ERROR) {
2895 TRACE_USER("Unrecoverable error decoding H2 HEADERS", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02002896 goto fail;
Willy Tarreau17c630b2023-01-19 23:58:11 +01002897 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002898
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002899 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2900 /* RFC7540#5.1 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002901 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 +01002902 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2903 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau4781b152021-04-06 13:53:36 +02002904 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002905 goto fail;
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002906 }
2907
Willy Tarreau25919232019-01-03 14:48:18 +01002908 if (error <= 0) {
Christopher Faulet485da0b2021-10-08 08:56:00 +02002909 if (error == 0) {
2910 /* Demux not blocked because of the stream, it is an incomplete frame */
2911 if (!(h2c->flags &H2_CF_DEM_BLOCK_ANY))
2912 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002913 goto fail; // missing data
Christopher Faulet485da0b2021-10-08 08:56:00 +02002914 }
Willy Tarreau25919232019-01-03 14:48:18 +01002915
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002916 /* stream error : send RST_STREAM */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002917 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 +01002918 h2s_error(h2s, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002919 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau4781b152021-04-06 13:53:36 +02002920 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02002921 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002922 }
2923
Willy Tarreau95acc8b2022-05-27 16:14:10 +02002924 if (se_fl_test(h2s->sd, SE_FL_ERROR) && h2s->st < H2_SS_ERROR)
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002925 h2s->st = H2_SS_ERROR;
Christopher Fauletfa922f02019-05-07 10:55:17 +02002926 else if (h2s->flags & H2_SF_ES_RCVD) {
2927 if (h2s->st == H2_SS_OPEN)
2928 h2s->st = H2_SS_HREM;
2929 else if (h2s->st == H2_SS_HLOC)
2930 h2s_close(h2s);
2931 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002932
Christopher Fauletf95f8762021-01-22 11:59:07 +01002933 /* Unblock busy server h2s waiting for the response headers to validate
2934 * the tunnel establishment or the end of the response of an oborted
2935 * tunnel
2936 */
2937 if ((h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY)) == (H2_SF_BODY_TUNNEL|H2_SF_BLK_MBUSY) ||
2938 (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)) {
2939 TRACE_STATE("Unblock h2s blocked on tunnel establishment/abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2940 h2s->flags &= ~H2_SF_BLK_MBUSY;
2941 }
2942
Willy Tarreau9abb3172021-06-16 18:32:42 +02002943 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 +02002944 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002945 return h2s;
Willy Tarreau7838a792019-08-12 18:42:03 +02002946 fail:
2947 TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2948 return NULL;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002949
2950 send_rst:
2951 /* make the demux send an RST for the current stream. We may only
2952 * do this if we're certain that the HEADERS frame was properly
2953 * decompressed so that the HPACK decoder is still kept up to date.
2954 */
2955 h2_release_buf(h2c, &rxbuf);
2956 h2c->st0 = H2_CS_FRAME_E;
2957
Willy Tarreau022e5e52020-09-10 09:33:15 +02002958 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 +02002959 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2960 return h2s;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002961}
2962
Willy Tarreau454f9052017-10-26 19:40:35 +02002963/* processes a DATA frame. Returns > 0 on success or zero on missing data.
2964 * It may return an error in h2c or h2s. Described in RFC7540#6.1.
2965 */
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01002966static int h2c_handle_data(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02002967{
2968 int error;
2969
Willy Tarreau7838a792019-08-12 18:42:03 +02002970 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2971
Willy Tarreau454f9052017-10-26 19:40:35 +02002972 /* note that empty DATA frames are perfectly valid and sometimes used
2973 * to signal an end of stream (with the ES flag).
2974 */
2975
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002976 if (!b_size(&h2c->dbuf) && h2c->dfl) {
2977 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002978 goto fail; // empty buffer
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002979 }
Willy Tarreau454f9052017-10-26 19:40:35 +02002980
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002981 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf)) {
2982 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7838a792019-08-12 18:42:03 +02002983 goto fail; // incomplete frame
Christopher Fauletb5f7b522021-07-26 12:06:53 +02002984 }
Willy Tarreau454f9052017-10-26 19:40:35 +02002985
2986 /* now either the frame is complete or the buffer is complete */
2987
Willy Tarreau454f9052017-10-26 19:40:35 +02002988 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2989 /* RFC7540#6.1 */
2990 error = H2_ERR_STREAM_CLOSED;
2991 goto strm_err;
2992 }
2993
Christopher Faulet4f09ec82019-06-19 09:25:58 +02002994 if ((h2s->flags & H2_SF_DATA_CLEN) && (h2c->dfl - h2c->dpl) > h2s->body_len) {
Willy Tarreau1915ca22019-01-24 11:49:37 +01002995 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01002996 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 +01002997 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02002998 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau1915ca22019-01-24 11:49:37 +01002999 goto strm_err;
3000 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01003001 if (!(h2c->flags & H2_CF_IS_BACK) &&
3002 (h2s->flags & (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT)) == (H2_SF_TUNNEL_ABRT|H2_SF_ES_SENT) &&
3003 ((h2c->dfl - h2c->dpl) || !(h2c->dff & H2_F_DATA_END_STREAM))) {
3004 /* a tunnel attempt was aborted but the client still try to send some raw data.
3005 * Thus the stream is closed with the CANCEL error. Here we take care it is not
3006 * an empty DATA Frame with the ES flag. The error is only handled if ES was
3007 * already sent to the client because depending on the scheduling, these data may
Ilya Shipitsinacf84592021-02-06 22:29:08 +05003008 * have been sent before the server response but not handle here.
Christopher Faulet91b21dc2021-01-22 12:13:15 +01003009 */
3010 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
3011 error = H2_ERR_CANCEL;
3012 goto strm_err;
3013 }
Willy Tarreau1915ca22019-01-24 11:49:37 +01003014
Willy Tarreaua56a6de2018-02-26 15:59:07 +01003015 if (!h2_frt_transfer_data(h2s))
Willy Tarreau7838a792019-08-12 18:42:03 +02003016 goto fail;
Willy Tarreaua56a6de2018-02-26 15:59:07 +01003017
Willy Tarreau454f9052017-10-26 19:40:35 +02003018 /* call the upper layers to process the frame, then let the upper layer
3019 * notify the stream about any change.
3020 */
Willy Tarreau7be4ee02022-05-18 07:31:41 +02003021 if (!h2s_sc(h2s)) {
Willy Tarreau082c4572019-08-06 10:11:02 +02003022 /* The upper layer has already closed, this may happen on
3023 * 4xx/redirects during POST, or when receiving a response
3024 * from an H2 server after the client has aborted.
3025 */
3026 error = H2_ERR_CANCEL;
Willy Tarreau454f9052017-10-26 19:40:35 +02003027 goto strm_err;
3028 }
3029
Willy Tarreau8f650c32017-11-21 19:36:21 +01003030 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02003031 goto fail;
Willy Tarreau8f650c32017-11-21 19:36:21 +01003032
Willy Tarreau721c9742017-11-07 11:05:42 +01003033 if (h2s->st >= H2_SS_ERROR) {
Willy Tarreau454f9052017-10-26 19:40:35 +02003034 /* stream error : send RST_STREAM */
Willy Tarreaua20a5192017-12-27 11:02:06 +01003035 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02003036 }
3037
3038 /* check for completion : the callee will change this to FRAME_A or
3039 * FRAME_H once done.
3040 */
3041 if (h2c->st0 == H2_CS_FRAME_P)
Willy Tarreau7838a792019-08-12 18:42:03 +02003042 goto fail;
Willy Tarreau454f9052017-10-26 19:40:35 +02003043
Willy Tarreauc4134ba2017-12-11 18:45:08 +01003044 /* last frame */
3045 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02003046 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreaufc10f592019-01-30 19:28:32 +01003047 if (h2s->st == H2_SS_OPEN)
3048 h2s->st = H2_SS_HREM;
3049 else
3050 h2s_close(h2s);
3051
Willy Tarreau1915ca22019-01-24 11:49:37 +01003052 if (h2s->flags & H2_SF_DATA_CLEN && h2s->body_len) {
3053 /* RFC7540#8.1.2 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003054 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 +01003055 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau4781b152021-04-06 13:53:36 +02003056 HA_ATOMIC_INC(&h2c->px_counters->strm_proto_err);
Willy Tarreau1915ca22019-01-24 11:49:37 +01003057 goto strm_err;
3058 }
Willy Tarreauc4134ba2017-12-11 18:45:08 +01003059 }
3060
Christopher Fauletf95f8762021-01-22 11:59:07 +01003061 /* Unblock busy server h2s waiting for the end of the response for an
3062 * aborted tunnel
3063 */
3064 if ((h2c->flags & H2_CF_IS_BACK) &&
3065 (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)) {
3066 TRACE_STATE("Unblock h2s blocked on tunnel abort", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
3067 h2s->flags &= ~H2_SF_BLK_MBUSY;
3068 }
3069
Willy Tarreau7838a792019-08-12 18:42:03 +02003070 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02003071 return 1;
3072
Willy Tarreau454f9052017-10-26 19:40:35 +02003073 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01003074 h2s_error(h2s, error);
3075 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003076 fail:
3077 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 +02003078 return 0;
3079}
3080
Willy Tarreau63864812019-08-07 14:25:20 +02003081/* check that the current frame described in h2c->{dsi,dft,dfl,dff,...} is
3082 * valid for the current stream state. This is needed only after parsing the
3083 * frame header but in practice it can be performed at any time during
3084 * H2_CS_FRAME_P since no state transition happens there. Returns >0 on success
3085 * or 0 in case of error, in which case either h2s or h2c will carry an error.
3086 */
3087static int h2_frame_check_vs_state(struct h2c *h2c, struct h2s *h2s)
3088{
Willy Tarreau7838a792019-08-12 18:42:03 +02003089 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
3090
Willy Tarreau63864812019-08-07 14:25:20 +02003091 if (h2s->st == H2_SS_IDLE &&
3092 h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) {
3093 /* RFC7540#5.1: any frame other than HEADERS or PRIORITY in
3094 * this state MUST be treated as a connection error
3095 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003096 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 +02003097 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003098 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau63864812019-08-07 14:25:20 +02003099 /* only log if no other stream can report the error */
3100 sess_log(h2c->conn->owner);
3101 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003102 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7838a792019-08-12 18:42:03 +02003103 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 +02003104 return 0;
3105 }
3106
Willy Tarreau57a18162019-11-24 14:57:53 +01003107 if (h2s->st == H2_SS_IDLE && (h2c->flags & H2_CF_IS_BACK)) {
3108 /* only PUSH_PROMISE would be permitted here */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003109 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 +01003110 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02003111 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau57a18162019-11-24 14:57:53 +01003112 TRACE_DEVEL("leaving in error (idle&back)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s);
3113 return 0;
3114 }
3115
Willy Tarreau63864812019-08-07 14:25:20 +02003116 if (h2s->st == H2_SS_HREM && h2c->dft != H2_FT_WINDOW_UPDATE &&
3117 h2c->dft != H2_FT_RST_STREAM && h2c->dft != H2_FT_PRIORITY) {
3118 /* RFC7540#5.1: any frame other than WU/PRIO/RST in
3119 * this state MUST be treated as a stream error.
3120 * 6.2, 6.6 and 6.10 further mandate that HEADERS/
3121 * PUSH_PROMISE/CONTINUATION cause connection errors.
3122 */
Amaury Denoyellea8879232020-10-27 17:16:03 +01003123 if (h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003124 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 +02003125 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02003126 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Amaury Denoyellea8879232020-10-27 17:16:03 +01003127 }
3128 else {
Willy Tarreau63864812019-08-07 14:25:20 +02003129 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
Amaury Denoyellea8879232020-10-27 17:16:03 +01003130 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003131 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 +02003132 return 0;
3133 }
3134
3135 /* Below the management of frames received in closed state is a
3136 * bit hackish because the spec makes strong differences between
3137 * streams closed by receiving RST, sending RST, and seeing ES
3138 * in both directions. In addition to this, the creation of a
3139 * new stream reusing the identifier of a closed one will be
3140 * detected here. Given that we cannot keep track of all closed
3141 * streams forever, we consider that unknown closed streams were
3142 * closed on RST received, which allows us to respond with an
3143 * RST without breaking the connection (eg: to abort a transfer).
3144 * Some frames have to be silently ignored as well.
3145 */
3146 if (h2s->st == H2_SS_CLOSED && h2c->dsi) {
3147 if (!(h2c->flags & H2_CF_IS_BACK) && h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
3148 /* #5.1.1: The identifier of a newly
3149 * established stream MUST be numerically
3150 * greater than all streams that the initiating
3151 * endpoint has opened or reserved. This
3152 * governs streams that are opened using a
3153 * HEADERS frame and streams that are reserved
3154 * using PUSH_PROMISE. An endpoint that
3155 * receives an unexpected stream identifier
3156 * MUST respond with a connection error.
3157 */
3158 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003159 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 +02003160 return 0;
3161 }
3162
Willy Tarreau4c08f122019-09-26 08:47:15 +02003163 if (h2s->flags & H2_SF_RST_RCVD &&
3164 !(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 +02003165 /* RFC7540#5.1:closed: an endpoint that
3166 * receives any frame other than PRIORITY after
3167 * receiving a RST_STREAM MUST treat that as a
3168 * stream error of type STREAM_CLOSED.
3169 *
3170 * Note that old streams fall into this category
3171 * and will lead to an RST being sent.
3172 *
3173 * However, we cannot generalize this to all frame types. Those
3174 * carrying compression state must still be processed before
3175 * being dropped or we'll desynchronize the decoder. This can
3176 * happen with request trailers received after sending an
3177 * RST_STREAM, or with header/trailers responses received after
3178 * sending RST_STREAM (aborted stream).
Willy Tarreau4c08f122019-09-26 08:47:15 +02003179 *
3180 * In addition, since our CLOSED streams always carry the
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003181 * RST_RCVD bit, we don't want to accidentally catch valid
Willy Tarreau4c08f122019-09-26 08:47:15 +02003182 * frames for a closed stream, i.e. RST/PRIO/WU.
Willy Tarreau63864812019-08-07 14:25:20 +02003183 */
3184 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
3185 h2c->st0 = H2_CS_FRAME_E;
Christopher Faulet6884aa32019-09-23 15:28:20 +02003186 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 +02003187 return 0;
3188 }
3189
3190 /* RFC7540#5.1:closed: if this state is reached as a
3191 * result of sending a RST_STREAM frame, the peer that
3192 * receives the RST_STREAM might have already sent
3193 * frames on the stream that cannot be withdrawn. An
3194 * endpoint MUST ignore frames that it receives on
3195 * closed streams after it has sent a RST_STREAM
3196 * frame. An endpoint MAY choose to limit the period
3197 * over which it ignores frames and treat frames that
3198 * arrive after this time as being in error.
3199 */
3200 if (h2s->id && !(h2s->flags & H2_SF_RST_SENT)) {
3201 /* RFC7540#5.1:closed: any frame other than
3202 * PRIO/WU/RST in this state MUST be treated as
3203 * a connection error
3204 */
3205 if (h2c->dft != H2_FT_RST_STREAM &&
3206 h2c->dft != H2_FT_PRIORITY &&
3207 h2c->dft != H2_FT_WINDOW_UPDATE) {
3208 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02003209 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 +02003210 return 0;
3211 }
3212 }
3213 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003214 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02003215 return 1;
3216}
3217
Willy Tarreaubc933932017-10-09 16:21:43 +02003218/* process Rx frames to be demultiplexed */
3219static void h2_process_demux(struct h2c *h2c)
3220{
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003221 struct h2s *h2s = NULL, *tmp_h2s;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003222 struct h2_fh hdr;
3223 unsigned int padlen = 0;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003224 int32_t old_iw = h2c->miw;
Willy Tarreauf3ee0692017-10-17 08:18:25 +02003225
Willy Tarreau7838a792019-08-12 18:42:03 +02003226 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3227
Willy Tarreau081d4722017-05-16 21:51:05 +02003228 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02003229 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02003230
3231 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3232 if (h2c->st0 == H2_CS_PREFACE) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003233 TRACE_STATE("expecting preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02003234 if (h2c->flags & H2_CF_IS_BACK)
Willy Tarreau7838a792019-08-12 18:42:03 +02003235 goto out;
3236
Willy Tarreau52eed752017-09-22 15:05:09 +02003237 if (unlikely(h2c_frt_recv_preface(h2c) <= 0)) {
3238 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02003239 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003240 TRACE_PROTO("failed to receive preface", H2_EV_RX_PREFACE|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003241 h2c->st0 = H2_CS_ERROR2;
Willy Tarreauee4684f2021-06-17 08:08:48 +02003242 if (b_data(&h2c->dbuf) ||
Christopher Faulet3f35da22021-07-26 10:18:35 +02003243 !(((const struct session *)h2c->conn->owner)->fe->options & (PR_O_NULLNOLOG|PR_O_IGNORE_PRB)))
Willy Tarreauee4684f2021-06-17 08:08:48 +02003244 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02003245 }
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003246 goto done;
Willy Tarreau52eed752017-09-22 15:05:09 +02003247 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003248 TRACE_PROTO("received preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02003249
3250 h2c->max_id = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02003251 TRACE_STATE("switching to SETTINGS1", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreaued2b9d92022-08-18 15:30:41 +02003252 h2c->st0 = H2_CS_SETTINGS1;
Willy Tarreau52eed752017-09-22 15:05:09 +02003253 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003254
3255 if (h2c->st0 == H2_CS_SETTINGS1) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003256 /* ensure that what is pending is a valid SETTINGS frame
3257 * without an ACK.
3258 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003259 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 +02003260 if (!h2_get_frame_hdr(&h2c->dbuf, &hdr)) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003261 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003262 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau22de8d32018-09-05 19:55:58 +02003263 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003264 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 +02003265 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003266 if (!(h2c->flags & H2_CF_IS_BACK))
3267 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02003268 }
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003269 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003270 }
3271
3272 if (hdr.sid || hdr.ft != H2_FT_SETTINGS || hdr.ff & H2_F_SETTINGS_ACK) {
3273 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003274 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 +02003275 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
3276 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003277 if (!(h2c->flags & H2_CF_IS_BACK))
3278 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003279 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003280 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003281 }
3282
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003283 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003284 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003285 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 +02003286 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
3287 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003288 if (!(h2c->flags & H2_CF_IS_BACK))
3289 sess_log(h2c->conn->owner);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003290 goto done;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003291 }
3292
Willy Tarreau3bf69182018-12-21 15:34:50 +01003293 /* that's OK, switch to FRAME_P to process it. This is
3294 * a SETTINGS frame whose header has already been
3295 * deleted above.
3296 */
Willy Tarreau54f46e52019-01-30 15:11:03 +01003297 padlen = 0;
Willy Tarreau4781b152021-04-06 13:53:36 +02003298 HA_ATOMIC_INC(&h2c->px_counters->settings_rcvd);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003299 goto new_frame;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02003300 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003301 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003302
3303 /* process as many incoming frames as possible below */
Willy Tarreau7838a792019-08-12 18:42:03 +02003304 while (1) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02003305 int ret = 0;
3306
Willy Tarreau7838a792019-08-12 18:42:03 +02003307 if (!b_data(&h2c->dbuf)) {
3308 TRACE_DEVEL("no more Rx data", H2_EV_RX_FRAME, h2c->conn);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003309 h2c->flags |= H2_CF_DEM_SHORT_READ;
3310 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003311 }
3312
3313 if (h2c->st0 >= H2_CS_ERROR) {
3314 TRACE_STATE("end of connection reported", H2_EV_RX_FRAME|H2_EV_RX_EOI, h2c->conn);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003315 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003316 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003317
3318 if (h2c->st0 == H2_CS_FRAME_H) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003319 TRACE_STATE("expecting H2 frame header", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003320 if (!h2_peek_frame_hdr(&h2c->dbuf, 0, &hdr)) {
3321 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003322 break;
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003323 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003324
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02003325 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003326 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 +02003327 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003328 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02003329 /* only log if no other stream can report the error */
3330 sess_log(h2c->conn->owner);
3331 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003332 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003333 break;
3334 }
3335
Willy Tarreau617592c2022-06-08 16:32:22 +02003336 if (h2c->rcvd_s && h2c->dsi != hdr.sid) {
3337 /* changed stream with a pending WU, need to
3338 * send it now.
3339 */
3340 TRACE_PROTO("sending stream WINDOW_UPDATE frame on stream switch", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
3341 ret = h2c_send_strm_wu(h2c);
3342 if (ret <= 0)
3343 break;
3344 }
3345
Christopher Fauletdd2a5622019-06-18 12:22:38 +02003346 padlen = 0;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003347 if (h2_ft_bit(hdr.ft) & H2_FT_PADDED_MASK && hdr.ff & H2_F_PADDED) {
3348 /* If the frame is padded (HEADERS, PUSH_PROMISE or DATA),
3349 * we read the pad length and drop it from the remaining
3350 * payload (one byte + the 9 remaining ones = 10 total
3351 * removed), so we have a frame payload starting after the
3352 * pad len. Flow controlled frames (DATA) also count the
3353 * padlen in the flow control, so it must be adjusted.
3354 */
3355 if (hdr.len < 1) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003356 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 +01003357 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003358 if (!(h2c->flags & H2_CF_IS_BACK))
3359 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003360 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003361 goto done;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003362 }
3363 hdr.len--;
3364
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003365 if (b_data(&h2c->dbuf) < 10) {
3366 h2c->flags |= H2_CF_DEM_SHORT_READ;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003367 break; // missing padlen
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003368 }
Willy Tarreau3bf69182018-12-21 15:34:50 +01003369
3370 padlen = *(uint8_t *)b_peek(&h2c->dbuf, 9);
3371
3372 if (padlen > hdr.len) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003373 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 +01003374 /* RFC7540#6.1 : pad length = length of
3375 * frame payload or greater => error.
3376 */
3377 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003378 if (!(h2c->flags & H2_CF_IS_BACK))
3379 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003380 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003381 goto done;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003382 }
3383
3384 if (h2_ft_bit(hdr.ft) & H2_FT_FC_MASK) {
3385 h2c->rcvd_c++;
3386 h2c->rcvd_s++;
3387 }
3388 b_del(&h2c->dbuf, 1);
3389 }
3390 h2_skip_frame_hdr(&h2c->dbuf);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003391
3392 new_frame:
Willy Tarreau7e98c052017-10-10 15:56:59 +02003393 h2c->dfl = hdr.len;
3394 h2c->dsi = hdr.sid;
3395 h2c->dft = hdr.ft;
3396 h2c->dff = hdr.ff;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003397 h2c->dpl = padlen;
Willy Tarreau0f458712022-08-18 11:19:57 +02003398 h2c->flags |= H2_CF_DEM_IN_PROGRESS;
Willy Tarreau73db4342019-09-25 07:28:44 +02003399 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 +02003400 h2c->st0 = H2_CS_FRAME_P;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003401
3402 /* check for minimum basic frame format validity */
3403 ret = h2_frame_check(h2c->dft, 1, h2c->dsi, h2c->dfl, global.tune.bufsize);
3404 if (ret != H2_ERR_NO_ERROR) {
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003405 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 +01003406 h2c_error(h2c, ret);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003407 if (!(h2c->flags & H2_CF_IS_BACK))
3408 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003409 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003410 goto done;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003411 }
Willy Tarreau15a47332022-03-18 15:57:34 +01003412
3413 /* transition to HEADERS frame ends the keep-alive idle
3414 * timer and starts the http-request idle delay.
3415 */
3416 if (hdr.ft == H2_FT_HEADERS)
3417 h2c->idle_start = now_ms;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003418 }
3419
Willy Tarreau9fd5aa82019-08-06 15:21:45 +02003420 /* Only H2_CS_FRAME_P, H2_CS_FRAME_A and H2_CS_FRAME_E here.
3421 * H2_CS_FRAME_P indicates an incomplete previous operation
3422 * (most often the first attempt) and requires some validity
3423 * checks for the frame and the current state. The two other
3424 * ones are set after completion (or abortion) and must skip
3425 * validity checks.
3426 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003427 tmp_h2s = h2c_st_by_id(h2c, h2c->dsi);
3428
Willy Tarreau7be4ee02022-05-18 07:31:41 +02003429 if (tmp_h2s != h2s && h2s && h2s_sc(h2s) &&
Willy Tarreau567beb82018-12-18 16:52:44 +01003430 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003431 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003432 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003433 (h2s->flags & H2_SF_ES_RCVD) ||
Willy Tarreau95acc8b2022-05-27 16:14:10 +02003434 se_fl_test(h2s->sd, SE_FL_ERROR | SE_FL_ERR_PENDING | SE_FL_EOS))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003435 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003436 TRACE_DEVEL("notifying stream before switching SID", H2_EV_RX_FRAME|H2_EV_STRM_WAKE, h2c->conn, h2s);
Willy Tarreau95acc8b2022-05-27 16:14:10 +02003437 se_fl_set(h2s->sd, SE_FL_RCV_MORE);
Willy Tarreau7e094452018-12-19 18:08:52 +01003438 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003439 }
3440 h2s = tmp_h2s;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003441
Willy Tarreau63864812019-08-07 14:25:20 +02003442 if (h2c->st0 == H2_CS_FRAME_E ||
Willy Tarreau7838a792019-08-12 18:42:03 +02003443 (h2c->st0 == H2_CS_FRAME_P && !h2_frame_check_vs_state(h2c, h2s))) {
3444 TRACE_PROTO("stream error reported", H2_EV_RX_FRAME|H2_EV_PROTO_ERR, h2c->conn, h2s);
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003445 goto strm_err;
Willy Tarreau7838a792019-08-12 18:42:03 +02003446 }
Willy Tarreauc0da1962017-10-30 18:38:00 +01003447
Willy Tarreau7e98c052017-10-10 15:56:59 +02003448 switch (h2c->dft) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02003449 case H2_FT_SETTINGS:
Willy Tarreau7838a792019-08-12 18:42:03 +02003450 if (h2c->st0 == H2_CS_FRAME_P) {
3451 TRACE_PROTO("receiving H2 SETTINGS frame", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn, h2s);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003452 ret = h2c_handle_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003453 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003454 HA_ATOMIC_INC(&h2c->px_counters->settings_rcvd);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003455
Willy Tarreau7838a792019-08-12 18:42:03 +02003456 if (h2c->st0 == H2_CS_FRAME_A) {
3457 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 +02003458 ret = h2c_ack_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003459 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003460 break;
3461
Willy Tarreaucf68c782017-10-10 17:11:41 +02003462 case H2_FT_PING:
Willy Tarreau7838a792019-08-12 18:42:03 +02003463 if (h2c->st0 == H2_CS_FRAME_P) {
3464 TRACE_PROTO("receiving H2 PING frame", H2_EV_RX_FRAME|H2_EV_RX_PING, h2c->conn, h2s);
Willy Tarreaucf68c782017-10-10 17:11:41 +02003465 ret = h2c_handle_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003466 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003467
Willy Tarreau7838a792019-08-12 18:42:03 +02003468 if (h2c->st0 == H2_CS_FRAME_A) {
3469 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 +02003470 ret = h2c_ack_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003471 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003472 break;
3473
Willy Tarreau26f95952017-07-27 17:18:30 +02003474 case H2_FT_WINDOW_UPDATE:
Willy Tarreau7838a792019-08-12 18:42:03 +02003475 if (h2c->st0 == H2_CS_FRAME_P) {
3476 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 +02003477 ret = h2c_handle_window_update(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003478 }
Willy Tarreau26f95952017-07-27 17:18:30 +02003479 break;
3480
Willy Tarreau61290ec2017-10-17 08:19:21 +02003481 case H2_FT_CONTINUATION:
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05003482 /* RFC7540#6.10: CONTINUATION may only be preceded by
Willy Tarreauea18f862018-12-22 20:19:26 +01003483 * a HEADERS/PUSH_PROMISE/CONTINUATION frame. These
3484 * frames' parsers consume all following CONTINUATION
3485 * frames so this one is out of sequence.
Willy Tarreau61290ec2017-10-17 08:19:21 +02003486 */
Willy Tarreau5dd36ac2020-12-01 10:24:29 +01003487 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 +01003488 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003489 if (!(h2c->flags & H2_CF_IS_BACK))
3490 sess_log(h2c->conn->owner);
Willy Tarreau4781b152021-04-06 13:53:36 +02003491 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003492 goto done;
Willy Tarreau61290ec2017-10-17 08:19:21 +02003493
Willy Tarreau13278b42017-10-13 19:23:14 +02003494 case H2_FT_HEADERS:
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003495 if (h2c->st0 == H2_CS_FRAME_P) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003496 TRACE_PROTO("receiving H2 HEADERS frame", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02003497 if (h2c->flags & H2_CF_IS_BACK)
3498 tmp_h2s = h2c_bck_handle_headers(h2c, h2s);
3499 else
3500 tmp_h2s = h2c_frt_handle_headers(h2c, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003501 if (tmp_h2s) {
3502 h2s = tmp_h2s;
3503 ret = 1;
3504 }
3505 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003506 HA_ATOMIC_INC(&h2c->px_counters->headers_rcvd);
Willy Tarreau13278b42017-10-13 19:23:14 +02003507 break;
3508
Willy Tarreau454f9052017-10-26 19:40:35 +02003509 case H2_FT_DATA:
Willy Tarreau7838a792019-08-12 18:42:03 +02003510 if (h2c->st0 == H2_CS_FRAME_P) {
3511 TRACE_PROTO("receiving H2 DATA frame", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Christopher Fauletfac0f8f2020-12-07 18:27:03 +01003512 ret = h2c_handle_data(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003513 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003514 HA_ATOMIC_INC(&h2c->px_counters->data_rcvd);
Willy Tarreau454f9052017-10-26 19:40:35 +02003515
Willy Tarreau7838a792019-08-12 18:42:03 +02003516 if (h2c->st0 == H2_CS_FRAME_A) {
Willy Tarreau617592c2022-06-08 16:32:22 +02003517 /* rcvd_s will suffice to trigger the sending of a WU */
3518 h2c->st0 = H2_CS_FRAME_H;
Willy Tarreau7838a792019-08-12 18:42:03 +02003519 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003520 break;
Willy Tarreaucd234e92017-08-18 10:59:39 +02003521
Willy Tarreau92153fc2017-12-03 19:46:19 +01003522 case H2_FT_PRIORITY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003523 if (h2c->st0 == H2_CS_FRAME_P) {
3524 TRACE_PROTO("receiving H2 PRIORITY frame", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn, h2s);
Willy Tarreau92153fc2017-12-03 19:46:19 +01003525 ret = h2c_handle_priority(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003526 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01003527 break;
3528
Willy Tarreaucd234e92017-08-18 10:59:39 +02003529 case H2_FT_RST_STREAM:
Willy Tarreau7838a792019-08-12 18:42:03 +02003530 if (h2c->st0 == H2_CS_FRAME_P) {
3531 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 +02003532 ret = h2c_handle_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003533 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003534 HA_ATOMIC_INC(&h2c->px_counters->rst_stream_rcvd);
Willy Tarreaucd234e92017-08-18 10:59:39 +02003535 break;
3536
Willy Tarreaue96b0922017-10-30 00:28:29 +01003537 case H2_FT_GOAWAY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003538 if (h2c->st0 == H2_CS_FRAME_P) {
3539 TRACE_PROTO("receiving H2 GOAWAY frame", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn, h2s);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003540 ret = h2c_handle_goaway(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003541 }
Willy Tarreau4781b152021-04-06 13:53:36 +02003542 HA_ATOMIC_INC(&h2c->px_counters->goaway_rcvd);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003543 break;
3544
Willy Tarreau1c661982017-10-30 13:52:01 +01003545 /* implement all extra frame types here */
Willy Tarreau7e98c052017-10-10 15:56:59 +02003546 default:
Willy Tarreau7838a792019-08-12 18:42:03 +02003547 TRACE_PROTO("receiving H2 ignored frame", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003548 /* drop frames that we ignore. They may be larger than
3549 * the buffer so we drain all of their contents until
3550 * we reach the end.
3551 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003552 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3553 b_del(&h2c->dbuf, ret);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003554 h2c->dfl -= ret;
3555 ret = h2c->dfl == 0;
3556 }
3557
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003558 strm_err:
Willy Tarreaua20a5192017-12-27 11:02:06 +01003559 /* We may have to send an RST if not done yet */
Willy Tarreau7838a792019-08-12 18:42:03 +02003560 if (h2s->st == H2_SS_ERROR) {
3561 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 +01003562 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003563 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003564
Willy Tarreau7838a792019-08-12 18:42:03 +02003565 if (h2c->st0 == H2_CS_FRAME_E) {
3566 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 +01003567 ret = h2c_send_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003568 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003569
Willy Tarreau7e98c052017-10-10 15:56:59 +02003570 /* error or missing data condition met above ? */
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003571 if (ret <= 0)
Willy Tarreau7e98c052017-10-10 15:56:59 +02003572 break;
3573
3574 if (h2c->st0 != H2_CS_FRAME_H) {
Willy Tarreaubba7a4d2020-09-18 07:41:28 +02003575 if (h2c->dfl)
3576 TRACE_DEVEL("skipping remaining frame payload", H2_EV_RX_FRAME, h2c->conn, h2s);
Christopher Faulet5112a602019-09-26 16:38:28 +02003577 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3578 b_del(&h2c->dbuf, ret);
3579 h2c->dfl -= ret;
3580 if (!h2c->dfl) {
Willy Tarreau0f458712022-08-18 11:19:57 +02003581 h2c->flags &= ~H2_CF_DEM_IN_PROGRESS;
Christopher Faulet5112a602019-09-26 16:38:28 +02003582 TRACE_STATE("switching to FRAME_H", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
3583 h2c->st0 = H2_CS_FRAME_H;
Christopher Faulet5112a602019-09-26 16:38:28 +02003584 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003585 }
3586 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003587
Willy Tarreau617592c2022-06-08 16:32:22 +02003588 if (h2c->rcvd_s > 0 &&
Christopher Faulet68ee7842022-10-12 10:21:33 +02003589 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM))) {
Willy Tarreau617592c2022-06-08 16:32:22 +02003590 TRACE_PROTO("sending stream WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn, h2s);
3591 h2c_send_strm_wu(h2c);
3592 }
3593
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003594 if (h2c->rcvd_c > 0 &&
Christopher Faulet68ee7842022-10-12 10:21:33 +02003595 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003596 TRACE_PROTO("sending H2 WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003597 h2c_send_conn_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003598 }
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003599
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003600 done:
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003601 if (h2c->st0 >= H2_CS_ERROR || (h2c->flags & H2_CF_DEM_SHORT_READ)) {
3602 if (h2c->flags & H2_CF_RCVD_SHUT)
3603 h2c->flags |= H2_CF_END_REACHED;
3604 }
3605
Willy Tarreau7be4ee02022-05-18 07:31:41 +02003606 if (h2s && h2s_sc(h2s) &&
Willy Tarreau567beb82018-12-18 16:52:44 +01003607 (b_data(&h2s->rxbuf) ||
Christopher Fauletaade4ed2020-10-08 15:38:41 +02003608 h2c_read0_pending(h2c) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003609 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003610 (h2s->flags & H2_SF_ES_RCVD) ||
Willy Tarreau95acc8b2022-05-27 16:14:10 +02003611 se_fl_test(h2s->sd, SE_FL_ERROR | SE_FL_ERR_PENDING | SE_FL_EOS))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003612 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003613 TRACE_DEVEL("notifying stream before switching SID", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn, h2s);
Willy Tarreau95acc8b2022-05-27 16:14:10 +02003614 se_fl_set(h2s->sd, SE_FL_RCV_MORE);
Willy Tarreau7e094452018-12-19 18:08:52 +01003615 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003616 }
Willy Tarreau1ed87b72018-11-25 08:45:16 +01003617
Willy Tarreau7838a792019-08-12 18:42:03 +02003618 if (old_iw != h2c->miw) {
3619 TRACE_STATE("notifying streams about SFCTL increase", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003620 h2c_unblock_sfctl(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003621 }
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003622
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003623 h2c_restart_reading(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02003624 out:
3625 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3d4631f2021-01-20 10:53:13 +01003626 return;
Willy Tarreaubc933932017-10-09 16:21:43 +02003627}
3628
Willy Tarreau989539b2020-01-10 17:01:29 +01003629/* resume each h2s eligible for sending in list head <head> */
3630static void h2_resume_each_sending_h2s(struct h2c *h2c, struct list *head)
3631{
3632 struct h2s *h2s, *h2s_back;
3633
3634 TRACE_ENTER(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3635
3636 list_for_each_entry_safe(h2s, h2s_back, head, list) {
3637 if (h2c->mws <= 0 ||
3638 h2c->flags & H2_CF_MUX_BLOCK_ANY ||
3639 h2c->st0 >= H2_CS_ERROR)
3640 break;
3641
3642 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003643
Willy Tarreaud9464162020-01-10 18:25:07 +01003644 if (h2s->flags & H2_SF_NOTIFIED)
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003645 continue;
3646
Willy Tarreau5723f292020-01-10 15:16:57 +01003647 /* If the sender changed his mind and unsubscribed, let's just
3648 * remove the stream from the send_list.
Willy Tarreau989539b2020-01-10 17:01:29 +01003649 */
Willy Tarreauf96508a2020-01-10 11:12:48 +01003650 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) &&
3651 (!h2s->subs || !(h2s->subs->events & SUB_RETRY_SEND))) {
Willy Tarreau989539b2020-01-10 17:01:29 +01003652 LIST_DEL_INIT(&h2s->list);
3653 continue;
3654 }
3655
Willy Tarreauf96508a2020-01-10 11:12:48 +01003656 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau5723f292020-01-10 15:16:57 +01003657 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01003658 tasklet_wakeup(h2s->subs->tasklet);
3659 h2s->subs->events &= ~SUB_RETRY_SEND;
3660 if (!h2s->subs->events)
3661 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01003662 }
3663 else if (h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) {
3664 tasklet_wakeup(h2s->shut_tl);
3665 }
Willy Tarreau989539b2020-01-10 17:01:29 +01003666 }
3667
3668 TRACE_LEAVE(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3669}
3670
Willy Tarreaubc933932017-10-09 16:21:43 +02003671/* process Tx frames from streams to be multiplexed. Returns > 0 if it reached
3672 * the end.
3673 */
3674static int h2_process_mux(struct h2c *h2c)
3675{
Willy Tarreau7838a792019-08-12 18:42:03 +02003676 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3677
Willy Tarreau01b44822018-10-03 14:26:37 +02003678 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3679 if (unlikely(h2c->st0 == H2_CS_PREFACE && (h2c->flags & H2_CF_IS_BACK))) {
3680 if (unlikely(h2c_bck_send_preface(h2c) <= 0)) {
3681 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003682 if (h2c->st0 == H2_CS_ERROR)
Willy Tarreau01b44822018-10-03 14:26:37 +02003683 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau01b44822018-10-03 14:26:37 +02003684 goto fail;
3685 }
3686 h2c->st0 = H2_CS_SETTINGS1;
3687 }
3688 /* need to wait for the other side */
Willy Tarreau75a930a2018-12-12 08:03:58 +01003689 if (h2c->st0 < H2_CS_FRAME_H)
Willy Tarreau7838a792019-08-12 18:42:03 +02003690 goto done;
Willy Tarreau01b44822018-10-03 14:26:37 +02003691 }
3692
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003693 /* start by sending possibly pending window updates */
Willy Tarreaue74679a2019-08-06 15:39:32 +02003694 if (h2c->rcvd_s > 0 &&
3695 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3696 h2c_send_strm_wu(h2c) < 0)
3697 goto fail;
3698
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003699 if (h2c->rcvd_c > 0 &&
3700 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3701 h2c_send_conn_wu(h2c) < 0)
3702 goto fail;
3703
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003704 /* First we always process the flow control list because the streams
3705 * waiting there were already elected for immediate emission but were
3706 * blocked just on this.
3707 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003708 h2_resume_each_sending_h2s(h2c, &h2c->fctl_list);
3709 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003710
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003711 fail:
Willy Tarreau3eabe9b2017-11-07 11:03:01 +01003712 if (unlikely(h2c->st0 >= H2_CS_ERROR)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02003713 if (h2c->st0 == H2_CS_ERROR) {
3714 if (h2c->max_id >= 0) {
3715 h2c_send_goaway_error(h2c, NULL);
3716 if (h2c->flags & H2_CF_MUX_BLOCK_ANY)
Willy Tarreau7838a792019-08-12 18:42:03 +02003717 goto out0;
Willy Tarreau081d4722017-05-16 21:51:05 +02003718 }
3719
3720 h2c->st0 = H2_CS_ERROR2; // sent (or failed hard) !
3721 }
Willy Tarreau081d4722017-05-16 21:51:05 +02003722 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003723 done:
3724 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
3725 return 1;
3726 out0:
3727 TRACE_DEVEL("leaving in blocked situation", H2_EV_H2C_WAKE, h2c->conn);
3728 return 0;
Willy Tarreaubc933932017-10-09 16:21:43 +02003729}
3730
Willy Tarreau62f52692017-10-08 23:01:42 +02003731
Willy Tarreau479998a2018-11-18 06:30:59 +01003732/* Attempt to read data, and subscribe if none available.
3733 * The function returns 1 if data has been received, otherwise zero.
3734 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003735static int h2_recv(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003736{
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003737 struct connection *conn = h2c->conn;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003738 struct buffer *buf;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003739 int max;
Olivier Houchard7505f942018-08-21 18:10:44 +02003740 size_t ret;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003741
Willy Tarreau7838a792019-08-12 18:42:03 +02003742 TRACE_ENTER(H2_EV_H2C_RECV, h2c->conn);
3743
3744 if (h2c->wait_event.events & SUB_RETRY_RECV) {
3745 TRACE_DEVEL("leaving on sub_recv", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003746 return (b_data(&h2c->dbuf));
Willy Tarreau7838a792019-08-12 18:42:03 +02003747 }
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003748
Willy Tarreau7838a792019-08-12 18:42:03 +02003749 if (!h2_recv_allowed(h2c)) {
3750 TRACE_DEVEL("leaving on !recv_allowed", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003751 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003752 }
Willy Tarreaua2af5122017-10-09 11:56:46 +02003753
Willy Tarreau44e973f2018-03-01 17:49:30 +01003754 buf = h2_get_buf(h2c, &h2c->dbuf);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003755 if (!buf) {
3756 h2c->flags |= H2_CF_DEM_DALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02003757 TRACE_DEVEL("leaving on !alloc", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003758 return 0;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003759 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003760
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003761 if (!b_data(buf)) {
3762 /* try to pre-align the buffer like the
3763 * rxbufs will be to optimize memory copies. We'll make
3764 * sure that the frame header lands at the end of the
3765 * HTX block to alias it upon recv. We cannot use the
3766 * head because rcv_buf() will realign the buffer if
3767 * it's empty. Thus we cheat and pretend we already
3768 * have a few bytes there.
3769 */
3770 max = buf_room_for_htx_data(buf) + 9;
3771 buf->head = sizeof(struct htx) - 9;
3772 }
3773 else
3774 max = b_room(buf);
Willy Tarreau2a59e872018-12-12 08:23:47 +01003775
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003776 ret = max ? conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0) : 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003777
Christopher Fauletde9d6052021-04-23 12:25:18 +02003778 if (max && !ret && h2_recv_allowed(h2c)) {
3779 TRACE_DATA("failed to receive data, subscribing", H2_EV_H2C_RECV, h2c->conn);
3780 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h2c->wait_event);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003781 } else if (ret) {
Willy Tarreau022e5e52020-09-10 09:33:15 +02003782 TRACE_DATA("received data", H2_EV_H2C_RECV, h2c->conn, 0, 0, (void*)(long)ret);
Christopher Fauletb5f7b522021-07-26 12:06:53 +02003783 h2c->flags &= ~H2_CF_DEM_SHORT_READ;
3784 }
Olivier Houchard81a15af2018-10-19 17:26:49 +02003785
Christopher Fauletde9d6052021-04-23 12:25:18 +02003786 if (conn_xprt_read0_pending(h2c->conn)) {
3787 TRACE_DATA("received read0", H2_EV_H2C_RECV, h2c->conn);
3788 h2c->flags |= H2_CF_RCVD_SHUT;
3789 }
Christopher Fauletff7925d2022-10-11 19:12:40 +02003790 if (h2c->conn->flags & CO_FL_ERROR) {
3791 TRACE_DATA("connection error", H2_EV_H2C_RECV, h2c->conn);
3792 h2c->flags |= H2_CF_ERROR;
3793 }
Christopher Fauletde9d6052021-04-23 12:25:18 +02003794
Olivier Houcharda1411e62018-08-17 18:42:48 +02003795 if (!b_data(buf)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +01003796 h2_release_buf(h2c, &h2c->dbuf);
Christopher Fauletff7925d2022-10-11 19:12:40 +02003797 goto end;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003798 }
3799
Willy Tarreau7838a792019-08-12 18:42:03 +02003800 if (b_data(buf) == buf->size) {
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003801 h2c->flags |= H2_CF_DEM_DFULL;
Willy Tarreau35fb8462019-10-02 11:05:46 +02003802 TRACE_STATE("demux buffer full", H2_EV_H2C_RECV|H2_EV_H2C_BLK, h2c->conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003803 }
3804
Christopher Fauletff7925d2022-10-11 19:12:40 +02003805 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02003806 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Christopher Fauletff7925d2022-10-11 19:12:40 +02003807 return !!ret || (h2c->flags & (H2_CF_RCVD_SHUT|H2_CF_ERROR));
Willy Tarreau62f52692017-10-08 23:01:42 +02003808}
3809
Willy Tarreau479998a2018-11-18 06:30:59 +01003810/* Try to send data if possible.
3811 * The function returns 1 if data have been sent, otherwise zero.
3812 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003813static int h2_send(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003814{
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003815 struct connection *conn = h2c->conn;
Willy Tarreaubc933932017-10-09 16:21:43 +02003816 int done;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003817 int sent = 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003818
Willy Tarreau7838a792019-08-12 18:42:03 +02003819 TRACE_ENTER(H2_EV_H2C_SEND, h2c->conn);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003820
Christopher Fauletff7925d2022-10-11 19:12:40 +02003821 if (h2c->flags & (H2_CF_ERROR|H2_CF_ERR_PENDING)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003822 TRACE_DEVEL("leaving on error", H2_EV_H2C_SEND, h2c->conn);
Christopher Fauletff7925d2022-10-11 19:12:40 +02003823 if (h2c->flags & H2_CF_RCVD_SHUT)
3824 h2c->flags |= H2_CF_ERROR;
3825 b_reset(br_tail(h2c->mbuf));
Willy Tarreau7838a792019-08-12 18:42:03 +02003826 return 1;
3827 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003828
Willy Tarreaubc933932017-10-09 16:21:43 +02003829 /* This loop is quite simple : it tries to fill as much as it can from
3830 * pending streams into the existing buffer until it's reportedly full
3831 * or the end of send requests is reached. Then it tries to send this
3832 * buffer's contents out, marks it not full if at least one byte could
3833 * be sent, and tries again.
3834 *
3835 * The snd_buf() function normally takes a "flags" argument which may
3836 * be made of a combination of CO_SFL_MSG_MORE to indicate that more
3837 * data immediately comes and CO_SFL_STREAMER to indicate that the
3838 * connection is streaming lots of data (used to increase TLS record
3839 * size at the expense of latency). The former can be sent any time
3840 * there's a buffer full flag, as it indicates at least one stream
3841 * attempted to send and failed so there are pending data. An
3842 * alternative would be to set it as long as there's an active stream
3843 * but that would be problematic for ACKs until we have an absolute
3844 * guarantee that all waiters have at least one byte to send. The
3845 * latter should possibly not be set for now.
3846 */
3847
3848 done = 0;
Christopher Faulet21fb6bd2023-03-28 12:16:53 +02003849 while (!(conn->flags & CO_FL_WAIT_XPRT) && !done) {
Willy Tarreaubc933932017-10-09 16:21:43 +02003850 unsigned int flags = 0;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003851 unsigned int released = 0;
3852 struct buffer *buf;
Willy Tarreau464fa062023-03-17 16:09:14 +01003853 uint to_send;
Willy Tarreaubc933932017-10-09 16:21:43 +02003854
3855 /* fill as much as we can into the current buffer */
3856 while (((h2c->flags & (H2_CF_MUX_MFULL|H2_CF_MUX_MALLOC)) == 0) && !done)
3857 done = h2_process_mux(h2c);
3858
Olivier Houchard2b094432019-01-29 18:28:36 +01003859 if (h2c->flags & H2_CF_MUX_MALLOC)
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003860 done = 1; // we won't go further without extra buffers
Olivier Houchard2b094432019-01-29 18:28:36 +01003861
Christopher Faulet9a3d3fc2020-10-22 16:24:58 +02003862 if ((conn->flags & (CO_FL_SOCK_WR_SH|CO_FL_ERROR)) ||
Willy Tarreaue6dc7a02021-10-21 17:30:06 +02003863 (h2c->flags & H2_CF_GOAWAY_FAILED))
Willy Tarreaubc933932017-10-09 16:21:43 +02003864 break;
3865
Christopher Faulet68ee7842022-10-12 10:21:33 +02003866 if (h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM))
Willy Tarreaubc933932017-10-09 16:21:43 +02003867 flags |= CO_SFL_MSG_MORE;
3868
Willy Tarreau464fa062023-03-17 16:09:14 +01003869 to_send = br_count(h2c->mbuf);
3870 if (to_send > 1) {
Willy Tarreau14ea98a2023-03-16 17:30:30 +01003871 /* usually we want to emit small TLS records to speed
3872 * up the decoding on the client. That's what is being
3873 * done by default. However if there is more than one
3874 * buffer being allocated, we're streaming large data
3875 * so we stich to large records.
3876 */
3877 flags |= CO_SFL_STREAMER;
3878 }
3879
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003880 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3881 if (b_data(buf)) {
Willy Tarreau464fa062023-03-17 16:09:14 +01003882 int ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, buf, b_data(buf),
3883 flags | (to_send > 1 ? CO_SFL_MSG_MORE : 0));
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003884 if (!ret) {
3885 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003886 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003887 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003888 sent = 1;
Willy Tarreau464fa062023-03-17 16:09:14 +01003889 to_send--;
Willy Tarreau022e5e52020-09-10 09:33:15 +02003890 TRACE_DATA("sent data", H2_EV_H2C_SEND, h2c->conn, 0, buf, (void*)(long)ret);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003891 b_del(buf, ret);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003892 if (b_data(buf)) {
3893 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003894 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003895 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003896 }
3897 b_free(buf);
3898 released++;
Willy Tarreau787db9a2018-06-14 18:31:46 +02003899 }
Willy Tarreaubc933932017-10-09 16:21:43 +02003900
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003901 if (released)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01003902 offer_buffers(NULL, released);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003903
Willy Tarreau93c55112023-03-16 16:47:44 +01003904 /* Normally if wrote at least one byte, the buffer is not full
3905 * anymore. However, if it was marked full because all of its
3906 * buffers were used, we don't want to instantly wake up many
3907 * streams because we'd create a thundering herd effect, notably
3908 * when data are flushed in small chunks. Instead we wait for
3909 * the buffer to be decongested again before allowing to send
3910 * again. It also has the added benefit of not pumping more
3911 * data from the other side when it's known that this one is
3912 * still congested.
3913 */
3914 if (sent && br_single(h2c->mbuf))
Christopher Faulet69fe5ce2019-10-24 10:31:01 +02003915 h2c->flags &= ~(H2_CF_MUX_MFULL | H2_CF_DEM_MROOM);
Willy Tarreaubc933932017-10-09 16:21:43 +02003916 }
3917
Christopher Fauletff7925d2022-10-11 19:12:40 +02003918 if (conn->flags & CO_FL_ERROR) {
3919 h2c->flags |= H2_CF_ERR_PENDING;
3920 if (h2c->flags & H2_CF_RCVD_SHUT)
3921 h2c->flags |= H2_CF_ERROR;
Willy Tarreau51330962019-05-26 09:38:07 +02003922 b_reset(br_tail(h2c->mbuf));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003923 }
Christopher Fauletff7925d2022-10-11 19:12:40 +02003924
Olivier Houchard6ff20392018-07-17 18:46:31 +02003925 /* We're not full anymore, so we can wake any task that are waiting
3926 * for us.
3927 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003928 if (!(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM)) && h2c->st0 >= H2_CS_FRAME_H)
3929 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01003930
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003931 /* We're done, no more to send */
Christopher Faulet21fb6bd2023-03-28 12:16:53 +02003932 if (!(conn->flags & CO_FL_WAIT_XPRT) && !br_data(h2c->mbuf)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003933 TRACE_DEVEL("leaving with everything sent", H2_EV_H2C_SEND, h2c->conn);
Christopher Fauletff7925d2022-10-11 19:12:40 +02003934 goto end;
Willy Tarreau7838a792019-08-12 18:42:03 +02003935 }
Christopher Faulet21fb6bd2023-03-28 12:16:53 +02003936
Willy Tarreau7838a792019-08-12 18:42:03 +02003937 if (!(conn->flags & CO_FL_ERROR) && !(h2c->wait_event.events & SUB_RETRY_SEND)) {
3938 TRACE_STATE("more data to send, subscribing", H2_EV_H2C_SEND, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003939 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003940 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003941 TRACE_DEVEL("leaving with some data left to send", H2_EV_H2C_SEND, h2c->conn);
Christopher Fauletff7925d2022-10-11 19:12:40 +02003942end:
3943 return sent || (h2c->flags & (H2_CF_ERR_PENDING|H2_CF_ERROR));
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003944}
3945
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003946/* this is the tasklet referenced in h2c->wait_event.tasklet */
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003947struct task *h2_io_cb(struct task *t, void *ctx, unsigned int state)
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003948{
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003949 struct connection *conn;
3950 struct tasklet *tl = (struct tasklet *)t;
3951 int conn_in_list;
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003952 struct h2c *h2c = ctx;
Olivier Houchard7505f942018-08-21 18:10:44 +02003953 int ret = 0;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003954
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003955 if (state & TASK_F_USR1) {
3956 /* the tasklet was idling on an idle connection, it might have
3957 * been stolen, let's be careful!
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003958 */
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003959 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3960 if (t->context == NULL) {
3961 /* The connection has been taken over by another thread,
3962 * we're no longer responsible for it, so just free the
3963 * tasklet, and do nothing.
3964 */
3965 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3966 tasklet_free(tl);
Willy Tarreau74163142021-03-13 11:30:19 +01003967 t = NULL;
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003968 goto leave;
3969 }
3970 conn = h2c->conn;
3971 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003972
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003973 /* Remove the connection from the list, to be sure nobody attempts
3974 * to use it while we handle the I/O events
3975 */
Christopher Faulet3a7b5392023-03-16 11:43:05 +01003976 conn_in_list = conn_get_idle_flag(conn);
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003977 if (conn_in_list)
3978 conn_delete_from_tree(&conn->hash_node->node);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003979
Willy Tarreaue388f2f2021-03-02 16:51:09 +01003980 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
3981 } else {
3982 /* we're certain the connection was not in an idle list */
3983 conn = h2c->conn;
3984 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3985 conn_in_list = 0;
3986 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003987
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003988 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchard7505f942018-08-21 18:10:44 +02003989 ret = h2_send(h2c);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003990 if (!(h2c->wait_event.events & SUB_RETRY_RECV))
Olivier Houchard7505f942018-08-21 18:10:44 +02003991 ret |= h2_recv(h2c);
Willy Tarreaucef5c8e2018-12-18 10:29:54 +01003992 if (ret || b_data(&h2c->dbuf))
Olivier Houchardcd4159f2020-03-10 18:39:42 +01003993 ret = h2_process(h2c);
3994
3995 /* If we were in an idle list, we want to add it back into it,
3996 * unless h2_process() returned -1, which mean it has destroyed
3997 * the connection (testing !ret is enough, if h2_process() wasn't
3998 * called then ret will be 0 anyway.
3999 */
Willy Tarreau74163142021-03-13 11:30:19 +01004000 if (ret < 0)
4001 t = NULL;
4002
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004003 if (!ret && conn_in_list) {
4004 struct server *srv = objt_server(conn->target);
4005
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004006 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004007 if (conn_in_list == CO_FL_SAFE_LIST)
Willy Tarreau85223482022-09-29 20:32:43 +02004008 eb64_insert(&srv->per_thr[tid].safe_conns, &conn->hash_node->node);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004009 else
Willy Tarreau85223482022-09-29 20:32:43 +02004010 eb64_insert(&srv->per_thr[tid].idle_conns, &conn->hash_node->node);
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004011 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004012 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004013
Willy Tarreau38468772020-06-28 00:31:13 +02004014leave:
Willy Tarreau7838a792019-08-12 18:42:03 +02004015 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreau74163142021-03-13 11:30:19 +01004016 return t;
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004017}
Willy Tarreaua2af5122017-10-09 11:56:46 +02004018
Willy Tarreau62f52692017-10-08 23:01:42 +02004019/* callback called on any event by the connection handler.
4020 * It applies changes and returns zero, or < 0 if it wants immediate
4021 * destruction of the connection (which normally doesn not happen in h2).
4022 */
Olivier Houchard7505f942018-08-21 18:10:44 +02004023static int h2_process(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02004024{
Olivier Houchard7505f942018-08-21 18:10:44 +02004025 struct connection *conn = h2c->conn;
Willy Tarreaua2af5122017-10-09 11:56:46 +02004026
Willy Tarreau7838a792019-08-12 18:42:03 +02004027 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
4028
Willy Tarreauf0961222021-02-05 11:41:46 +01004029 if (!(h2c->flags & H2_CF_DEM_BLOCK_ANY) &&
4030 (b_data(&h2c->dbuf) || (h2c->flags & H2_CF_RCVD_SHUT))) {
Willy Tarreaud13bf272017-12-14 10:34:52 +01004031 h2_process_demux(h2c);
4032
Christopher Fauletff7925d2022-10-11 19:12:40 +02004033 if (h2c->st0 >= H2_CS_ERROR || (h2c->flags & H2_CF_ERROR))
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004034 b_reset(&h2c->dbuf);
Willy Tarreaud13bf272017-12-14 10:34:52 +01004035
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004036 if (!b_full(&h2c->dbuf))
Willy Tarreaud13bf272017-12-14 10:34:52 +01004037 h2c->flags &= ~H2_CF_DEM_DFULL;
4038 }
Olivier Houchard7505f942018-08-21 18:10:44 +02004039 h2_send(h2c);
Willy Tarreaud13bf272017-12-14 10:34:52 +01004040
Christopher Fauletdfd10ab2021-10-06 14:24:19 +02004041 if (unlikely(h2c->proxy->flags & (PR_FL_DISABLED|PR_FL_STOPPED)) && !(h2c->flags & H2_CF_IS_BACK)) {
Remi Tricot-Le Bretonb5d968d2022-04-08 18:04:18 +02004042 int send_goaway = 1;
4043 /* If a close-spread-time option is set, we want to avoid
4044 * closing all the active HTTP2 connections at once so we add a
4045 * random factor that will spread the closing.
4046 */
4047 if (tick_isset(global.close_spread_end)) {
4048 int remaining_window = tick_remain(now_ms, global.close_spread_end);
4049 if (remaining_window) {
4050 /* This should increase the closing rate the
4051 * further along the window we are. */
4052 send_goaway = (remaining_window <= statistical_prng_range(global.close_spread_time));
4053 }
4054 }
Remi Tricot-Le Breton4d7fdc62022-04-26 15:17:18 +02004055 else if (global.tune.options & GTUNE_DISABLE_ACTIVE_CLOSE)
4056 send_goaway = 0; /* let the client close his connection himself */
Willy Tarreau8ec14062017-12-30 18:08:13 +01004057 /* frontend is stopping, reload likely in progress, let's try
4058 * to announce a graceful shutdown if not yet done. We don't
4059 * care if it fails, it will be tried again later.
4060 */
Remi Tricot-Le Bretonb5d968d2022-04-08 18:04:18 +02004061 if (send_goaway) {
4062 TRACE_STATE("proxy stopped, sending GOAWAY", H2_EV_H2C_WAKE|H2_EV_TX_FRAME, conn);
4063 if (!(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
4064 if (h2c->last_sid < 0)
4065 h2c->last_sid = (1U << 31) - 1;
4066 h2c_send_goaway_error(h2c, NULL);
4067 }
Willy Tarreau8ec14062017-12-30 18:08:13 +01004068 }
4069 }
4070
Olivier Houchard7fc96d52017-11-23 18:25:47 +01004071 /*
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004072 * If we received early data, and the handshake is done, wake
4073 * any stream that was waiting for it.
Olivier Houchard7fc96d52017-11-23 18:25:47 +01004074 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004075 if (!(h2c->flags & H2_CF_WAIT_FOR_HS) &&
Willy Tarreau911db9b2020-01-23 16:27:54 +01004076 (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 +01004077 struct eb32_node *node;
4078 struct h2s *h2s;
4079
4080 h2c->flags |= H2_CF_WAIT_FOR_HS;
4081 node = eb32_lookup_ge(&h2c->streams_by_id, 1);
4082
4083 while (node) {
4084 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau95acc8b2022-05-27 16:14:10 +02004085 if (se_fl_test(h2s->sd, SE_FL_WAIT_FOR_HS))
Willy Tarreau7e094452018-12-19 18:08:52 +01004086 h2s_notify_recv(h2s);
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004087 node = eb32_next(node);
4088 }
Olivier Houchard7fc96d52017-11-23 18:25:47 +01004089 }
Olivier Houchard6fa63d92017-11-27 18:41:32 +01004090
Christopher Fauletff7925d2022-10-11 19:12:40 +02004091 if ((h2c->flags & H2_CF_ERROR) || h2c_read0_pending(h2c) ||
Willy Tarreau29a98242017-10-31 06:59:15 +01004092 h2c->st0 == H2_CS_ERROR2 || h2c->flags & H2_CF_GOAWAY_FAILED ||
4093 (eb_is_empty(&h2c->streams_by_id) && h2c->last_sid >= 0 &&
4094 h2c->max_id >= h2c->last_sid)) {
Willy Tarreau23482912019-05-07 15:23:14 +02004095 h2_wake_some_streams(h2c, 0);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004096
4097 if (eb_is_empty(&h2c->streams_by_id)) {
4098 /* no more stream, kill the connection now */
Christopher Faulet73c12072019-04-08 11:23:22 +02004099 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004100 TRACE_DEVEL("leaving after releasing the connection", H2_EV_H2C_WAKE);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004101 return -1;
4102 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004103
4104 /* connections in error must be removed from the idle lists */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004105 if (conn->flags & CO_FL_LIST_MASK) {
4106 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004107 conn_delete_from_tree(&conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004108 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4109 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004110 }
4111 else if (h2c->st0 == H2_CS_ERROR) {
4112 /* connections in error must be removed from the idle lists */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004113 if (conn->flags & CO_FL_LIST_MASK) {
4114 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004115 conn_delete_from_tree(&conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004116 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4117 }
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004118 }
4119
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004120 if (!b_data(&h2c->dbuf))
Willy Tarreau44e973f2018-03-01 17:49:30 +01004121 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02004122
Christopher Fauletff7925d2022-10-11 19:12:40 +02004123 if (h2c->st0 == H2_CS_ERROR2 || (h2c->flags & H2_CF_GOAWAY_FAILED) ||
Olivier Houchard53216e72018-10-10 15:46:36 +02004124 (h2c->st0 != H2_CS_ERROR &&
Willy Tarreau662fafc2019-05-26 09:43:07 +02004125 !br_data(h2c->mbuf) &&
Olivier Houchard53216e72018-10-10 15:46:36 +02004126 (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) &&
4127 ((h2c->flags & H2_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&h2c->send_list))))
Willy Tarreau2e3c0002019-05-26 09:45:23 +02004128 h2_release_mbuf(h2c);
Willy Tarreaua2af5122017-10-09 11:56:46 +02004129
Willy Tarreau15a47332022-03-18 15:57:34 +01004130 h2c_update_timeout(h2c);
Olivier Houchard7505f942018-08-21 18:10:44 +02004131 h2_send(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004132 TRACE_LEAVE(H2_EV_H2C_WAKE, conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02004133 return 0;
4134}
4135
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004136/* wake-up function called by the connection layer (mux_ops.wake) */
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004137static int h2_wake(struct connection *conn)
4138{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004139 struct h2c *h2c = conn->ctx;
Willy Tarreau7838a792019-08-12 18:42:03 +02004140 int ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004141
Willy Tarreau7838a792019-08-12 18:42:03 +02004142 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
4143 ret = h2_process(h2c);
Willy Tarreau508f9892020-02-11 04:38:56 +01004144 if (ret >= 0)
4145 h2_wake_some_streams(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02004146 TRACE_LEAVE(H2_EV_H2C_WAKE);
4147 return ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004148}
4149
Willy Tarreauea392822017-10-31 10:02:25 +01004150/* Connection timeout management. The principle is that if there's no receipt
4151 * nor sending for a certain amount of time, the connection is closed. If the
4152 * MUX buffer still has lying data or is not allocatable, the connection is
4153 * immediately killed. If it's allocatable and empty, we attempt to send a
4154 * GOAWAY frame.
4155 */
Willy Tarreau144f84a2021-03-02 16:09:26 +01004156struct task *h2_timeout_task(struct task *t, void *context, unsigned int state)
Willy Tarreauea392822017-10-31 10:02:25 +01004157{
Olivier Houchard9f6af332018-05-25 14:04:04 +02004158 struct h2c *h2c = context;
Willy Tarreauea392822017-10-31 10:02:25 +01004159 int expired = tick_is_expired(t->expire, now_ms);
4160
Willy Tarreau7838a792019-08-12 18:42:03 +02004161 TRACE_ENTER(H2_EV_H2C_WAKE, h2c ? h2c->conn : NULL);
4162
Willy Tarreaubd42e922020-06-30 11:19:23 +02004163 if (h2c) {
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004164 /* Make sure nobody stole the connection from us */
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004165 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004166
4167 /* Somebody already stole the connection from us, so we should not
4168 * free it, we just have to free the task.
4169 */
4170 if (!t->context) {
4171 h2c = NULL;
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004172 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004173 goto do_leave;
4174 }
4175
4176
Willy Tarreaubd42e922020-06-30 11:19:23 +02004177 if (!expired) {
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004178 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004179 TRACE_DEVEL("leaving (not expired)", H2_EV_H2C_WAKE, h2c->conn);
4180 return t;
4181 }
Willy Tarreauea392822017-10-31 10:02:25 +01004182
Willy Tarreaubd42e922020-06-30 11:19:23 +02004183 if (!h2c_may_expire(h2c)) {
4184 /* we do still have streams but all of them are idle, waiting
4185 * for the data layer, so we must not enforce the timeout here.
4186 */
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004187 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004188 t->expire = TICK_ETERNITY;
4189 return t;
4190 }
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02004191
Willy Tarreaubd42e922020-06-30 11:19:23 +02004192 /* We're about to destroy the connection, so make sure nobody attempts
4193 * to steal it from us.
4194 */
Christopher Faulet3a7b5392023-03-16 11:43:05 +01004195 if (h2c->conn->flags & CO_FL_LIST_MASK)
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004196 conn_delete_from_tree(&h2c->conn->hash_node->node);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004197
Amaury Denoyelle5c7086f2021-01-11 09:21:52 +01004198 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Willy Tarreaubd42e922020-06-30 11:19:23 +02004199 }
Olivier Houchardcd4159f2020-03-10 18:39:42 +01004200
Olivier Houchard48ce6a32020-07-02 11:58:05 +02004201do_leave:
Olivier Houchard3f795f72019-04-17 22:51:06 +02004202 task_destroy(t);
Willy Tarreau0975f112018-03-29 15:22:59 +02004203
4204 if (!h2c) {
4205 /* resources were already deleted */
Willy Tarreau7838a792019-08-12 18:42:03 +02004206 TRACE_DEVEL("leaving (not more h2c)", H2_EV_H2C_WAKE);
Willy Tarreau0975f112018-03-29 15:22:59 +02004207 return NULL;
4208 }
4209
4210 h2c->task = NULL;
Willy Tarreauea392822017-10-31 10:02:25 +01004211 h2c_error(h2c, H2_ERR_NO_ERROR);
Willy Tarreau23482912019-05-07 15:23:14 +02004212 h2_wake_some_streams(h2c, 0);
Willy Tarreauea392822017-10-31 10:02:25 +01004213
Willy Tarreau662fafc2019-05-26 09:43:07 +02004214 if (br_data(h2c->mbuf)) {
Willy Tarreauea392822017-10-31 10:02:25 +01004215 /* don't even try to send a GOAWAY, the buffer is stuck */
4216 h2c->flags |= H2_CF_GOAWAY_FAILED;
4217 }
4218
4219 /* try to send but no need to insist */
Willy Tarreau599391a2017-11-24 10:16:00 +01004220 h2c->last_sid = h2c->max_id;
Willy Tarreauea392822017-10-31 10:02:25 +01004221 if (h2c_send_goaway_error(h2c, NULL) <= 0)
4222 h2c->flags |= H2_CF_GOAWAY_FAILED;
4223
Willy Tarreau662fafc2019-05-26 09:43:07 +02004224 if (br_data(h2c->mbuf) && !(h2c->flags & H2_CF_GOAWAY_FAILED) && conn_xprt_ready(h2c->conn)) {
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004225 unsigned int released = 0;
4226 struct buffer *buf;
4227
4228 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
4229 if (b_data(buf)) {
4230 int ret = h2c->conn->xprt->snd_buf(h2c->conn, h2c->conn->xprt_ctx, buf, b_data(buf), 0);
4231 if (!ret)
4232 break;
4233 b_del(buf, ret);
4234 if (b_data(buf))
4235 break;
4236 b_free(buf);
4237 released++;
4238 }
Willy Tarreau787db9a2018-06-14 18:31:46 +02004239 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02004240
4241 if (released)
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01004242 offer_buffers(NULL, released);
Willy Tarreau787db9a2018-06-14 18:31:46 +02004243 }
Willy Tarreauea392822017-10-31 10:02:25 +01004244
Willy Tarreau4481e262019-10-31 15:36:30 +01004245 /* in any case this connection must not be considered idle anymore */
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004246 if (h2c->conn->flags & CO_FL_LIST_MASK) {
4247 HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004248 conn_delete_from_tree(&h2c->conn->hash_node->node);
Amaury Denoyelle3d752a82021-02-19 15:37:38 +01004249 HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
4250 }
Willy Tarreau4481e262019-10-31 15:36:30 +01004251
Willy Tarreau0975f112018-03-29 15:22:59 +02004252 /* either we can release everything now or it will be done later once
4253 * the last stream closes.
4254 */
4255 if (eb_is_empty(&h2c->streams_by_id))
Christopher Faulet73c12072019-04-08 11:23:22 +02004256 h2_release(h2c);
Willy Tarreauea392822017-10-31 10:02:25 +01004257
Willy Tarreau7838a792019-08-12 18:42:03 +02004258 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreauea392822017-10-31 10:02:25 +01004259 return NULL;
4260}
4261
4262
Willy Tarreau62f52692017-10-08 23:01:42 +02004263/*******************************************/
4264/* functions below are used by the streams */
4265/*******************************************/
4266
4267/*
4268 * Attach a new stream to a connection
4269 * (Used for outgoing connections)
4270 */
Willy Tarreau95acc8b2022-05-27 16:14:10 +02004271static int h2_attach(struct connection *conn, struct sedesc *sd, struct session *sess)
Willy Tarreau62f52692017-10-08 23:01:42 +02004272{
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004273 struct h2s *h2s;
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004274 struct h2c *h2c = conn->ctx;
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004275
Willy Tarreau7838a792019-08-12 18:42:03 +02004276 TRACE_ENTER(H2_EV_H2S_NEW, conn);
Willy Tarreau95acc8b2022-05-27 16:14:10 +02004277 h2s = h2c_bck_stream_new(h2c, sd->sc, sess);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004278 if (!h2s) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004279 TRACE_DEVEL("leaving on stream creation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Christopher Faulete00ad352021-12-16 14:44:31 +01004280 return -1;
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01004281 }
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004282
4283 /* the connection is not idle anymore, let's mark this */
4284 HA_ATOMIC_AND(&h2c->wait_event.tasklet->state, ~TASK_F_USR1);
Willy Tarreau4f8cd432021-03-02 17:27:58 +01004285 xprt_set_used(h2c->conn, h2c->conn->xprt, h2c->conn->xprt_ctx);
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004286
Willy Tarreau7838a792019-08-12 18:42:03 +02004287 TRACE_LEAVE(H2_EV_H2S_NEW, conn, h2s);
Christopher Faulete00ad352021-12-16 14:44:31 +01004288 return 0;
Willy Tarreau62f52692017-10-08 23:01:42 +02004289}
4290
Willy Tarreau4596fe22022-05-17 19:07:51 +02004291/* Retrieves the first valid stream connector from this connection, or returns
4292 * NULL. We have to scan because we may have some orphan streams. It might be
Willy Tarreaufafd3982018-11-18 21:29:20 +01004293 * beneficial to scan backwards from the end to reduce the likeliness to find
4294 * orphans.
4295 */
Willy Tarreaud1373532022-05-27 11:00:59 +02004296static struct stconn *h2_get_first_sc(const struct connection *conn)
Willy Tarreaufafd3982018-11-18 21:29:20 +01004297{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01004298 struct h2c *h2c = conn->ctx;
Willy Tarreaufafd3982018-11-18 21:29:20 +01004299 struct h2s *h2s;
4300 struct eb32_node *node;
4301
4302 node = eb32_first(&h2c->streams_by_id);
4303 while (node) {
4304 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau7be4ee02022-05-18 07:31:41 +02004305 if (h2s_sc(h2s))
4306 return h2s_sc(h2s);
Willy Tarreaufafd3982018-11-18 21:29:20 +01004307 node = eb32_next(node);
4308 }
4309 return NULL;
4310}
4311
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004312static int h2_ctl(struct connection *conn, enum mux_ctl_type mux_ctl, void *output)
4313{
4314 int ret = 0;
4315 struct h2c *h2c = conn->ctx;
4316
4317 switch (mux_ctl) {
4318 case MUX_STATUS:
4319 /* Only consider the mux to be ready if we're done with
4320 * the preface and settings, and we had no error.
4321 */
4322 if (h2c->st0 >= H2_CS_FRAME_H && h2c->st0 < H2_CS_ERROR)
4323 ret |= MUX_STATUS_READY;
4324 return ret;
Christopher Faulet4c8ad842020-10-06 14:59:17 +02004325 case MUX_EXIT_STATUS:
4326 return MUX_ES_UNKNOWN;
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02004327 default:
4328 return -1;
4329 }
4330}
4331
Willy Tarreau62f52692017-10-08 23:01:42 +02004332/*
Olivier Houchard060ed432018-11-06 16:32:42 +01004333 * Destroy the mux and the associated connection, if it is no longer used
4334 */
Christopher Faulet73c12072019-04-08 11:23:22 +02004335static void h2_destroy(void *ctx)
Olivier Houchard060ed432018-11-06 16:32:42 +01004336{
Christopher Faulet73c12072019-04-08 11:23:22 +02004337 struct h2c *h2c = ctx;
Olivier Houchard060ed432018-11-06 16:32:42 +01004338
Willy Tarreau7838a792019-08-12 18:42:03 +02004339 TRACE_ENTER(H2_EV_H2C_END, h2c->conn);
Christopher Faulet4e610962022-04-14 11:23:50 +02004340 if (eb_is_empty(&h2c->streams_by_id)) {
4341 BUG_ON(h2c->conn->ctx != h2c);
Christopher Faulet73c12072019-04-08 11:23:22 +02004342 h2_release(h2c);
Christopher Faulet4e610962022-04-14 11:23:50 +02004343 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004344 TRACE_LEAVE(H2_EV_H2C_END);
Olivier Houchard060ed432018-11-06 16:32:42 +01004345}
4346
4347/*
Willy Tarreau62f52692017-10-08 23:01:42 +02004348 * Detach the stream from the connection and possibly release the connection.
4349 */
Willy Tarreau95acc8b2022-05-27 16:14:10 +02004350static void h2_detach(struct sedesc *sd)
Willy Tarreau62f52692017-10-08 23:01:42 +02004351{
Willy Tarreau95acc8b2022-05-27 16:14:10 +02004352 struct h2s *h2s = sd->se;
Willy Tarreau60935142017-10-16 18:11:19 +02004353 struct h2c *h2c;
Olivier Houchardf502aca2018-12-14 19:42:40 +01004354 struct session *sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004355
Willy Tarreau7838a792019-08-12 18:42:03 +02004356 TRACE_ENTER(H2_EV_STRM_END, h2s ? h2s->h2c->conn : NULL, h2s);
4357
Willy Tarreau7838a792019-08-12 18:42:03 +02004358 if (!h2s) {
4359 TRACE_LEAVE(H2_EV_STRM_END);
Willy Tarreau60935142017-10-16 18:11:19 +02004360 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004361 }
Willy Tarreau60935142017-10-16 18:11:19 +02004362
Willy Tarreaud9464162020-01-10 18:25:07 +01004363 /* there's no txbuf so we're certain not to be able to send anything */
4364 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02004365
Olivier Houchardf502aca2018-12-14 19:42:40 +01004366 sess = h2s->sess;
Willy Tarreau60935142017-10-16 18:11:19 +02004367 h2c = h2s->h2c;
Willy Tarreau36c22322022-05-27 10:41:24 +02004368 h2c->nb_sc--;
4369 if (!h2c->nb_sc)
Willy Tarreau15a47332022-03-18 15:57:34 +01004370 h2c->idle_start = now_ms;
4371
Willy Tarreaufa1d3572019-01-31 10:31:51 +01004372 if ((h2c->flags & (H2_CF_IS_BACK|H2_CF_DEM_TOOMANY)) == H2_CF_DEM_TOOMANY &&
Willy Tarreau36c22322022-05-27 10:41:24 +02004373 !h2_frt_has_too_many_sc(h2c)) {
Willy Tarreaufa1d3572019-01-31 10:31:51 +01004374 /* frontend connection was blocking new streams creation */
Willy Tarreauf2101912018-07-19 10:11:38 +02004375 h2c->flags &= ~H2_CF_DEM_TOOMANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004376 h2c_restart_reading(h2c, 1);
Willy Tarreauf2101912018-07-19 10:11:38 +02004377 }
Willy Tarreau60935142017-10-16 18:11:19 +02004378
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004379 /* this stream may be blocked waiting for some data to leave (possibly
4380 * an ES or RST frame), so orphan it in this case.
4381 */
Christopher Fauletff7925d2022-10-11 19:12:40 +02004382 if (!(h2c->flags & (H2_CF_ERR_PENDING|H2_CF_ERROR)) &&
Willy Tarreaua2b51812018-07-27 09:55:14 +02004383 (h2c->st0 < H2_CS_ERROR) &&
Willy Tarreau5723f292020-01-10 15:16:57 +01004384 (h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL)) &&
Willy Tarreauf96508a2020-01-10 11:12:48 +01004385 ((h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) || h2s->subs)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004386 TRACE_DEVEL("leaving on stream blocked", H2_EV_STRM_END|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau15a47332022-03-18 15:57:34 +01004387 /* refresh the timeout if none was active, so that the last
4388 * leaving stream may arm it.
4389 */
Willy Tarreau3fb2c6d2023-03-16 18:06:19 +01004390 if (h2c->task && !tick_isset(h2c->task->expire))
Willy Tarreau15a47332022-03-18 15:57:34 +01004391 h2c_update_timeout(h2c);
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004392 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02004393 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01004394
Christopher Faulet68ee7842022-10-12 10:21:33 +02004395 if ((h2c->flags & H2_CF_DEM_BLOCK_ANY && h2s->id == h2c->dsi)) {
Willy Tarreau45f752e2017-10-30 15:44:59 +01004396 /* unblock the connection if it was blocked on this
4397 * stream.
4398 */
4399 h2c->flags &= ~H2_CF_DEM_BLOCK_ANY;
4400 h2c->flags &= ~H2_CF_MUX_BLOCK_ANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02004401 h2c_restart_reading(h2c, 1);
Willy Tarreau45f752e2017-10-30 15:44:59 +01004402 }
4403
Willy Tarreau71049cc2018-03-28 13:56:39 +02004404 h2s_destroy(h2s);
Willy Tarreau60935142017-10-16 18:11:19 +02004405
Christopher Faulet9b79a102019-07-15 11:22:56 +02004406 if (h2c->flags & H2_CF_IS_BACK) {
Christopher Fauletff7925d2022-10-11 19:12:40 +02004407 if (!(h2c->flags & (H2_CF_RCVD_SHUT|H2_CF_ERR_PENDING|H2_CF_ERROR))) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004408 if (h2c->conn->flags & CO_FL_PRIVATE) {
Christopher Faulet08016ab2020-07-01 16:10:06 +02004409 /* Add the connection in the session server list, if not already done */
4410 if (!session_add_conn(sess, h2c->conn, h2c->conn->target)) {
4411 h2c->conn->owner = NULL;
4412 if (eb_is_empty(&h2c->streams_by_id)) {
4413 h2c->conn->mux->destroy(h2c);
4414 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4415 return;
Christopher Fauletc5579d12020-07-01 15:45:41 +02004416 }
4417 }
Christopher Faulet08016ab2020-07-01 16:10:06 +02004418 if (eb_is_empty(&h2c->streams_by_id)) {
Christopher Fauletc5579d12020-07-01 15:45:41 +02004419 if (session_check_idle_conn(h2c->conn->owner, h2c->conn) != 0) {
4420 /* At this point either the connection is destroyed, or it's been added to the server idle list, just stop */
4421 TRACE_DEVEL("leaving without reusable idle connection", H2_EV_STRM_END);
Olivier Houchard351411f2018-12-27 17:20:54 +01004422 return;
4423 }
4424 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004425 }
Christopher Fauletc5579d12020-07-01 15:45:41 +02004426 else {
4427 if (eb_is_empty(&h2c->streams_by_id)) {
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004428 /* If the connection is owned by the session, first remove it
4429 * from its list
4430 */
4431 if (h2c->conn->owner) {
4432 session_unown_conn(h2c->conn->owner, h2c->conn);
4433 h2c->conn->owner = NULL;
4434 }
4435
Willy Tarreaue388f2f2021-03-02 16:51:09 +01004436 /* mark that the tasklet may lose its context to another thread and
4437 * that the handler needs to check it under the idle conns lock.
4438 */
4439 HA_ATOMIC_OR(&h2c->wait_event.tasklet->state, TASK_F_USR1);
Willy Tarreau4f8cd432021-03-02 17:27:58 +01004440 xprt_set_idle(h2c->conn, h2c->conn->xprt, h2c->conn->xprt_ctx);
4441
Olivier Houcharddc2f2752020-02-13 19:12:07 +01004442 if (!srv_add_to_idle_list(objt_server(h2c->conn->target), h2c->conn, 1)) {
Olivier Houchard2444aa52020-01-20 13:56:01 +01004443 /* The server doesn't want it, let's kill the connection right away */
4444 h2c->conn->mux->destroy(h2c);
4445 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
4446 return;
4447 }
Olivier Houchard199d4fa2020-03-22 23:25:51 +01004448 /* At this point, the connection has been added to the
4449 * server idle list, so another thread may already have
4450 * hijacked it, so we can't do anything with it.
4451 */
Olivier Houchard2444aa52020-01-20 13:56:01 +01004452 TRACE_DEVEL("reusable idle connection", H2_EV_STRM_END);
4453 return;
Olivier Houchard8a786902018-12-15 16:05:40 +01004454
Olivier Houchard8a786902018-12-15 16:05:40 +01004455 }
Amaury Denoyelle8990b012021-02-19 15:29:16 +01004456 else if (!h2c->conn->hash_node->node.node.leaf_p &&
Amaury Denoyelle6b8daef2020-10-14 18:17:10 +02004457 h2_avail_streams(h2c->conn) > 0 && objt_server(h2c->conn->target) &&
Willy Tarreau2b718102021-04-21 07:32:39 +02004458 !LIST_INLIST(&h2c->conn->session_list)) {
Willy Tarreau85223482022-09-29 20:32:43 +02004459 eb64_insert(&__objt_server(h2c->conn->target)->per_thr[tid].avail_conns,
4460 &h2c->conn->hash_node->node);
Christopher Fauletc5579d12020-07-01 15:45:41 +02004461 }
Olivier Houchard8a786902018-12-15 16:05:40 +01004462 }
4463 }
4464 }
4465
Willy Tarreaue323f342018-03-28 13:51:45 +02004466 /* We don't want to close right now unless we're removing the
4467 * last stream, and either the connection is in error, or it
4468 * reached the ID already specified in a GOAWAY frame received
4469 * or sent (as seen by last_sid >= 0).
4470 */
Olivier Houchard7a977432019-03-21 15:47:13 +01004471 if (h2c_is_dead(h2c)) {
Willy Tarreaue323f342018-03-28 13:51:45 +02004472 /* no more stream will come, kill it now */
Willy Tarreau7838a792019-08-12 18:42:03 +02004473 TRACE_DEVEL("leaving and killing dead connection", H2_EV_STRM_END, h2c->conn);
Christopher Faulet73c12072019-04-08 11:23:22 +02004474 h2_release(h2c);
Willy Tarreaue323f342018-03-28 13:51:45 +02004475 }
4476 else if (h2c->task) {
Willy Tarreau15a47332022-03-18 15:57:34 +01004477 h2c_update_timeout(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02004478 TRACE_DEVEL("leaving, refreshing connection's timeout", H2_EV_STRM_END, h2c->conn);
Willy Tarreau60935142017-10-16 18:11:19 +02004479 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004480 else
4481 TRACE_DEVEL("leaving", H2_EV_STRM_END, h2c->conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02004482}
4483
Willy Tarreau88bdba32019-05-13 18:17:53 +02004484/* Performs a synchronous or asynchronous shutr(). */
4485static void h2_do_shutr(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004486{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004487 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004488
Willy Tarreauf983d002019-05-14 10:40:21 +02004489 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004490 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004491
Willy Tarreau7838a792019-08-12 18:42:03 +02004492 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4493
Willy Tarreau18059042019-01-31 19:12:48 +01004494 /* a connstream may require us to immediately kill the whole connection
4495 * for example because of a "tcp-request content reject" rule that is
4496 * normally used to limit abuse. In this case we schedule a goaway to
4497 * close the connection.
Willy Tarreau926fa4c2017-11-07 14:42:12 +01004498 */
Willy Tarreau95acc8b2022-05-27 16:14:10 +02004499 if (se_fl_test(h2s->sd, SE_FL_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004500 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004501 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004502 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4503 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4504 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004505 else if (!(h2s->flags & H2_SF_HEADERS_SENT)) {
4506 /* Nothing was never sent for this stream, so reset with
4507 * REFUSED_STREAM error to let the client retry the
4508 * request.
4509 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004510 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004511 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4512 }
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004513 else {
4514 /* a final response was already provided, we don't want this
4515 * stream anymore. This may happen when the server responds
4516 * before the end of an upload and closes quickly (redirect,
4517 * deny, ...)
4518 */
4519 h2s_error(h2s, H2_ERR_CANCEL);
4520 }
Willy Tarreau18059042019-01-31 19:12:48 +01004521
Willy Tarreau90c32322017-11-24 08:00:30 +01004522 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004523 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004524 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004525
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004526 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004527 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau00dd0782018-03-01 16:31:34 +01004528 h2s_close(h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004529 done:
4530 h2s->flags &= ~H2_SF_WANT_SHUTR;
Willy Tarreau7838a792019-08-12 18:42:03 +02004531 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004532 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004533add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004534 /* Let the handler know we want to shutr, and add ourselves to the
4535 * most relevant list if not yet done. h2_deferred_shut() will be
4536 * automatically called via the shut_tl tasklet when there's room
4537 * again.
4538 */
4539 h2s->flags |= H2_SF_WANT_SHUTR;
Willy Tarreau2b718102021-04-21 07:32:39 +02004540 if (!LIST_INLIST(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004541 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02004542 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004543 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Willy Tarreau2b718102021-04-21 07:32:39 +02004544 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004545 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004546 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004547 return;
Willy Tarreau62f52692017-10-08 23:01:42 +02004548}
4549
Willy Tarreau88bdba32019-05-13 18:17:53 +02004550/* Performs a synchronous or asynchronous shutw(). */
4551static void h2_do_shutw(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004552{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004553 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004554
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004555 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004556 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004557
Willy Tarreau7838a792019-08-12 18:42:03 +02004558 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4559
Willy Tarreau473e0e52022-08-18 16:12:15 +02004560 if (h2s->st != H2_SS_ERROR &&
4561 (h2s->flags & (H2_SF_HEADERS_SENT | H2_SF_MORE_HTX_DATA)) == H2_SF_HEADERS_SENT) {
4562 /* we can cleanly close using an empty data frame only after headers
4563 * and if no more data is expected to be sent.
4564 */
Willy Tarreau58e32082017-11-07 14:41:09 +01004565 if (!(h2s->flags & (H2_SF_ES_SENT|H2_SF_RST_SENT)) &&
4566 h2_send_empty_data_es(h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004567 goto add_to_list;
Willy Tarreau58e32082017-11-07 14:41:09 +01004568
4569 if (h2s->st == H2_SS_HREM)
Willy Tarreau00dd0782018-03-01 16:31:34 +01004570 h2s_close(h2s);
Willy Tarreau58e32082017-11-07 14:41:09 +01004571 else
4572 h2s->st = H2_SS_HLOC;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004573 } else {
Willy Tarreau18059042019-01-31 19:12:48 +01004574 /* a connstream may require us to immediately kill the whole connection
4575 * for example because of a "tcp-request content reject" rule that is
4576 * normally used to limit abuse. In this case we schedule a goaway to
4577 * close the connection.
Willy Tarreaua1349f02017-10-31 07:41:55 +01004578 */
Willy Tarreau95acc8b2022-05-27 16:14:10 +02004579 if (se_fl_test(h2s->sd, SE_FL_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004580 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004581 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004582 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4583 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4584 }
Willy Tarreau473e0e52022-08-18 16:12:15 +02004585 else if (h2s->flags & H2_SF_MORE_HTX_DATA) {
4586 /* some unsent data were pending (e.g. abort during an upload),
4587 * let's send a CANCEL.
4588 */
4589 TRACE_STATE("shutw before end of data, sending CANCEL", H2_EV_STRM_SHUT, h2c->conn, h2s);
4590 h2s_error(h2s, H2_ERR_CANCEL);
4591 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004592 else {
4593 /* Nothing was never sent for this stream, so reset with
4594 * REFUSED_STREAM error to let the client retry the
4595 * request.
4596 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004597 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004598 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4599 }
Willy Tarreau18059042019-01-31 19:12:48 +01004600
Willy Tarreau90c32322017-11-24 08:00:30 +01004601 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004602 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004603 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004604
Willy Tarreau00dd0782018-03-01 16:31:34 +01004605 h2s_close(h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004606 }
4607
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004608 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004609 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau7838a792019-08-12 18:42:03 +02004610
4611 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
4612
Willy Tarreau88bdba32019-05-13 18:17:53 +02004613 done:
4614 h2s->flags &= ~H2_SF_WANT_SHUTW;
4615 return;
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004616
4617 add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004618 /* Let the handler know we want to shutw, and add ourselves to the
4619 * most relevant list if not yet done. h2_deferred_shut() will be
4620 * automatically called via the shut_tl tasklet when there's room
4621 * again.
4622 */
4623 h2s->flags |= H2_SF_WANT_SHUTW;
Willy Tarreau2b718102021-04-21 07:32:39 +02004624 if (!LIST_INLIST(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004625 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02004626 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004627 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Willy Tarreau2b718102021-04-21 07:32:39 +02004628 LIST_APPEND(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004629 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004630 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004631 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004632}
4633
Willy Tarreau5723f292020-01-10 15:16:57 +01004634/* This is the tasklet referenced in h2s->shut_tl, it is used for
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004635 * deferred shutdowns when the h2_detach() was done but the mux buffer was full
4636 * and prevented the last frame from being emitted.
4637 */
Willy Tarreau144f84a2021-03-02 16:09:26 +01004638struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned int state)
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004639{
4640 struct h2s *h2s = ctx;
Willy Tarreau88bdba32019-05-13 18:17:53 +02004641 struct h2c *h2c = h2s->h2c;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004642
Willy Tarreau7838a792019-08-12 18:42:03 +02004643 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4644
Willy Tarreau5723f292020-01-10 15:16:57 +01004645 if (h2s->flags & H2_SF_NOTIFIED) {
4646 /* some data processing remains to be done first */
4647 goto end;
4648 }
4649
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004650 if (h2s->flags & H2_SF_WANT_SHUTW)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004651 h2_do_shutw(h2s);
4652
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004653 if (h2s->flags & H2_SF_WANT_SHUTR)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004654 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004655
Willy Tarreau88bdba32019-05-13 18:17:53 +02004656 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004657 /* We're done trying to send, remove ourself from the send_list */
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004658 LIST_DEL_INIT(&h2s->list);
Olivier Houchard7a977432019-03-21 15:47:13 +01004659
Willy Tarreau7be4ee02022-05-18 07:31:41 +02004660 if (!h2s_sc(h2s)) {
Willy Tarreau88bdba32019-05-13 18:17:53 +02004661 h2s_destroy(h2s);
Willy Tarreau74163142021-03-13 11:30:19 +01004662 if (h2c_is_dead(h2c)) {
Willy Tarreau88bdba32019-05-13 18:17:53 +02004663 h2_release(h2c);
Willy Tarreau74163142021-03-13 11:30:19 +01004664 t = NULL;
4665 }
Willy Tarreau88bdba32019-05-13 18:17:53 +02004666 }
Olivier Houchard7a977432019-03-21 15:47:13 +01004667 }
Willy Tarreau5723f292020-01-10 15:16:57 +01004668 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02004669 TRACE_LEAVE(H2_EV_STRM_SHUT);
Willy Tarreau74163142021-03-13 11:30:19 +01004670 return t;
Willy Tarreau62f52692017-10-08 23:01:42 +02004671}
4672
Willy Tarreau4596fe22022-05-17 19:07:51 +02004673/* shutr() called by the stream connector (mux_ops.shutr) */
Willy Tarreau36c22322022-05-27 10:41:24 +02004674static void h2_shutr(struct stconn *sc, enum co_shr_mode mode)
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004675{
Willy Tarreau36c22322022-05-27 10:41:24 +02004676 struct h2s *h2s = __sc_mux_strm(sc);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004677
Willy Tarreau7838a792019-08-12 18:42:03 +02004678 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02004679 if (mode)
4680 h2_do_shutr(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02004681 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004682}
4683
Willy Tarreau4596fe22022-05-17 19:07:51 +02004684/* shutw() called by the stream connector (mux_ops.shutw) */
Willy Tarreau36c22322022-05-27 10:41:24 +02004685static void h2_shutw(struct stconn *sc, enum co_shw_mode mode)
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004686{
Willy Tarreau36c22322022-05-27 10:41:24 +02004687 struct h2s *h2s = __sc_mux_strm(sc);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004688
Willy Tarreau7838a792019-08-12 18:42:03 +02004689 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004690 h2_do_shutw(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02004691 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004692}
4693
Christopher Faulet9b79a102019-07-15 11:22:56 +02004694/* Decode the payload of a HEADERS frame and produce the HTX request or response
4695 * depending on the connection's side. Returns a positive value on success, a
4696 * negative value on failure, or 0 if it couldn't proceed. May report connection
4697 * errors in h2c->errcode if the frame is non-decodable and the connection
4698 * unrecoverable. In absence of connection error when a failure is reported, the
4699 * caller must assume a stream error.
Willy Tarreauea18f862018-12-22 20:19:26 +01004700 *
4701 * The function may fold CONTINUATION frames into the initial HEADERS frame
4702 * by removing padding and next frame header, then moving the CONTINUATION
4703 * frame's payload and adjusting h2c->dfl to match the new aggregated frame,
4704 * leaving a hole between the main frame and the beginning of the next one.
4705 * The possibly remaining incomplete or next frame at the end may be moved
4706 * if the aggregated frame is not deleted, in order to fill the hole. Wrapped
4707 * HEADERS frames are unwrapped into a temporary buffer before decoding.
4708 *
4709 * A buffer at the beginning of processing may look like this :
4710 *
4711 * ,---.---------.-----.--------------.--------------.------.---.
4712 * |///| HEADERS | PAD | CONTINUATION | CONTINUATION | DATA |///|
4713 * `---^---------^-----^--------------^--------------^------^---'
4714 * | | <-----> | |
4715 * area | dpl | wrap
4716 * |<--------------> |
4717 * | dfl |
4718 * |<-------------------------------------------------->|
4719 * head data
4720 *
4721 * Padding is automatically overwritten when folding, participating to the
4722 * hole size after dfl :
4723 *
4724 * ,---.------------------------.-----.--------------.------.---.
4725 * |///| HEADERS : CONTINUATION |/////| CONTINUATION | DATA |///|
4726 * `---^------------------------^-----^--------------^------^---'
4727 * | | <-----> | |
4728 * area | hole | wrap
4729 * |<-----------------------> |
4730 * | dfl |
4731 * |<-------------------------------------------------->|
4732 * head data
4733 *
4734 * Please note that the HEADERS frame is always deprived from its PADLEN byte
4735 * however it may start with the 5 stream-dep+weight bytes in case of PRIORITY
4736 * bit.
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004737 *
4738 * The <flags> field must point to either the stream's flags or to a copy of it
4739 * so that the function can update the following flags :
4740 * - H2_SF_DATA_CLEN when content-length is seen
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004741 * - H2_SF_HEADERS_RCVD once the frame is successfully decoded
Willy Tarreau88d138e2019-01-02 19:38:14 +01004742 *
4743 * The H2_SF_HEADERS_RCVD flag is also looked at in the <flags> field prior to
4744 * decoding, in order to detect if we're dealing with a headers or a trailers
4745 * block (the trailers block appears after H2_SF_HEADERS_RCVD was seen).
Willy Tarreau13278b42017-10-13 19:23:14 +02004746 */
Willy Tarreau7cfbb812023-01-26 16:02:01 +01004747static int h2c_dec_hdrs(struct h2c *h2c, struct buffer *rxbuf, uint32_t *flags, unsigned long long *body_len, char *upgrade_protocol)
Willy Tarreau13278b42017-10-13 19:23:14 +02004748{
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004749 const uint8_t *hdrs = (uint8_t *)b_head(&h2c->dbuf);
Willy Tarreau83061a82018-07-13 11:56:34 +02004750 struct buffer *tmp = get_trash_chunk();
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004751 struct http_hdr list[global.tune.max_http_hdr * 2];
Willy Tarreau83061a82018-07-13 11:56:34 +02004752 struct buffer *copy = NULL;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004753 unsigned int msgf;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004754 struct htx *htx = NULL;
Willy Tarreauea18f862018-12-22 20:19:26 +01004755 int flen; // header frame len
4756 int hole = 0;
Willy Tarreau86277d42019-01-02 15:36:11 +01004757 int ret = 0;
4758 int outlen;
Willy Tarreau13278b42017-10-13 19:23:14 +02004759 int wrap;
Willy Tarreau13278b42017-10-13 19:23:14 +02004760
Willy Tarreau7838a792019-08-12 18:42:03 +02004761 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
4762
Willy Tarreauea18f862018-12-22 20:19:26 +01004763next_frame:
4764 if (b_data(&h2c->dbuf) - hole < h2c->dfl)
4765 goto leave; // incomplete input frame
4766
4767 /* No END_HEADERS means there's one or more CONTINUATION frames. In
4768 * this case, we'll try to paste it immediately after the initial
4769 * HEADERS frame payload and kill any possible padding. The initial
4770 * frame's length will be increased to represent the concatenation
4771 * of the two frames. The next frame is read from position <tlen>
4772 * and written at position <flen> (minus padding if some is present).
4773 */
4774 if (unlikely(!(h2c->dff & H2_F_HEADERS_END_HEADERS))) {
4775 struct h2_fh hdr;
4776 int clen; // CONTINUATION frame's payload length
4777
Willy Tarreau7838a792019-08-12 18:42:03 +02004778 TRACE_STATE("EH missing, expecting continuation frame", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_HDR, h2c->conn);
Willy Tarreauea18f862018-12-22 20:19:26 +01004779 if (!h2_peek_frame_hdr(&h2c->dbuf, h2c->dfl + hole, &hdr)) {
4780 /* no more data, the buffer may be full, either due to
4781 * too large a frame or because of too large a hole that
4782 * we're going to compact at the end.
4783 */
4784 goto leave;
4785 }
4786
4787 if (hdr.ft != H2_FT_CONTINUATION) {
4788 /* RFC7540#6.10: frame of unexpected type */
Willy Tarreau7838a792019-08-12 18:42:03 +02004789 TRACE_STATE("not continuation!", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_HDR|H2_EV_RX_CONT|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreauea18f862018-12-22 20:19:26 +01004790 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004791 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreauea18f862018-12-22 20:19:26 +01004792 goto fail;
4793 }
4794
4795 if (hdr.sid != h2c->dsi) {
4796 /* RFC7540#6.10: frame of different stream */
Willy Tarreau7838a792019-08-12 18:42:03 +02004797 TRACE_STATE("different stream ID!", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_HDR|H2_EV_RX_CONT|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreauea18f862018-12-22 20:19:26 +01004798 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004799 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreauea18f862018-12-22 20:19:26 +01004800 goto fail;
4801 }
4802
4803 if ((unsigned)hdr.len > (unsigned)global.tune.bufsize) {
4804 /* RFC7540#4.2: invalid frame length */
Willy Tarreau7838a792019-08-12 18:42:03 +02004805 TRACE_STATE("too large frame!", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_HDR|H2_EV_RX_CONT|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreauea18f862018-12-22 20:19:26 +01004806 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4807 goto fail;
4808 }
4809
4810 /* detect when we must stop aggragating frames */
4811 h2c->dff |= hdr.ff & H2_F_HEADERS_END_HEADERS;
4812
4813 /* Take as much as we can of the CONTINUATION frame's payload */
4814 clen = b_data(&h2c->dbuf) - (h2c->dfl + hole + 9);
4815 if (clen > hdr.len)
4816 clen = hdr.len;
4817
4818 /* Move the frame's payload over the padding, hole and frame
4819 * header. At least one of hole or dpl is null (see diagrams
4820 * above). The hole moves after the new aggragated frame.
4821 */
4822 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole + 9), clen, -(h2c->dpl + hole + 9));
Christopher Fauletcb1847c2021-04-21 11:11:21 +02004823 h2c->dfl += hdr.len - h2c->dpl;
Willy Tarreauea18f862018-12-22 20:19:26 +01004824 hole += h2c->dpl + 9;
4825 h2c->dpl = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004826 TRACE_STATE("waiting for next continuation frame", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_RX_CONT|H2_EV_RX_HDR, h2c->conn);
Willy Tarreauea18f862018-12-22 20:19:26 +01004827 goto next_frame;
4828 }
4829
4830 flen = h2c->dfl - h2c->dpl;
Willy Tarreau68472622017-12-11 18:36:37 +01004831
Willy Tarreau13278b42017-10-13 19:23:14 +02004832 /* if the input buffer wraps, take a temporary copy of it (rare) */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004833 wrap = b_wrap(&h2c->dbuf) - b_head(&h2c->dbuf);
Willy Tarreau13278b42017-10-13 19:23:14 +02004834 if (wrap < h2c->dfl) {
Willy Tarreau68dd9852017-07-03 14:44:26 +02004835 copy = alloc_trash_chunk();
4836 if (!copy) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004837 TRACE_DEVEL("failed to allocate temporary buffer", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_ERR, h2c->conn);
Willy Tarreau68dd9852017-07-03 14:44:26 +02004838 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
4839 goto fail;
4840 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004841 memcpy(copy->area, b_head(&h2c->dbuf), wrap);
4842 memcpy(copy->area + wrap, b_orig(&h2c->dbuf), h2c->dfl - wrap);
4843 hdrs = (uint8_t *) copy->area;
Willy Tarreau13278b42017-10-13 19:23:14 +02004844 }
4845
Willy Tarreau13278b42017-10-13 19:23:14 +02004846 /* Skip StreamDep and weight for now (we don't support PRIORITY) */
4847 if (h2c->dff & H2_F_HEADERS_PRIORITY) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004848 if (read_n32(hdrs) == h2c->dsi) {
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004849 /* RFC7540#5.3.1 : stream dep may not depend on itself */
Willy Tarreau7838a792019-08-12 18:42:03 +02004850 TRACE_STATE("invalid stream dependency!", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004851 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02004852 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreaua0d11b62018-09-05 18:30:05 +02004853 goto fail;
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004854 }
4855
Willy Tarreaua01f45e2018-12-31 07:41:24 +01004856 if (flen < 5) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004857 TRACE_STATE("frame too short for priority!", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreaua01f45e2018-12-31 07:41:24 +01004858 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4859 goto fail;
4860 }
4861
Willy Tarreau13278b42017-10-13 19:23:14 +02004862 hdrs += 5; // stream dep = 4, weight = 1
4863 flen -= 5;
4864 }
4865
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004866 if (!h2_get_buf(h2c, rxbuf)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004867 TRACE_STATE("waiting for h2c rxbuf allocation", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_BLK, h2c->conn);
Willy Tarreau937f7602018-02-26 15:22:17 +01004868 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau86277d42019-01-02 15:36:11 +01004869 goto leave;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004870 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004871
Willy Tarreau937f7602018-02-26 15:22:17 +01004872 /* we can't retry a failed decompression operation so we must be very
4873 * careful not to take any risks. In practice the output buffer is
4874 * always empty except maybe for trailers, in which case we simply have
4875 * to wait for the upper layer to finish consuming what is available.
4876 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004877 htx = htx_from_buf(rxbuf);
4878 if (!htx_is_empty(htx)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004879 TRACE_STATE("waiting for room in h2c rxbuf", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_BLK, h2c->conn);
Christopher Faulet9b79a102019-07-15 11:22:56 +02004880 h2c->flags |= H2_CF_DEM_SFULL;
4881 goto leave;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004882 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004883
Willy Tarreau25919232019-01-03 14:48:18 +01004884 /* past this point we cannot roll back in case of error */
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004885 outlen = hpack_decode_frame(h2c->ddht, hdrs, flen, list,
4886 sizeof(list)/sizeof(list[0]), tmp);
Willy Tarreau11e8a8c2023-01-24 19:43:11 +01004887
4888 if (outlen > 0 &&
4889 (TRACE_SOURCE)->verbosity >= H2_VERB_ADVANCED &&
4890 TRACE_ENABLED(TRACE_LEVEL_USER, H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, 0, 0, 0)) {
4891 struct ist n;
4892 int i;
4893
4894 for (i = 0; list[i].n.len; i++) {
4895 n = list[i].n;
4896
4897 if (!isttest(n)) {
4898 /* this is in fact a pseudo header whose number is in n.len */
4899 n = h2_phdr_to_ist(n.len);
4900 }
4901
4902 h2_trace_header(n, list[i].v, H2_EV_RX_FRAME|H2_EV_RX_HDR,
4903 ist(TRC_LOC), __FUNCTION__, h2c, NULL);
4904 }
4905 }
4906
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004907 if (outlen < 0) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004908 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 +01004909 h2c_error(h2c, H2_ERR_COMPRESSION_ERROR);
4910 goto fail;
4911 }
4912
Willy Tarreau25919232019-01-03 14:48:18 +01004913 /* The PACK decompressor was updated, let's update the input buffer and
4914 * the parser's state to commit these changes and allow us to later
4915 * fail solely on the stream if needed.
4916 */
4917 b_del(&h2c->dbuf, h2c->dfl + hole);
4918 h2c->dfl = hole = 0;
4919 h2c->st0 = H2_CS_FRAME_H;
4920
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004921 /* OK now we have our header list in <list> */
Willy Tarreau880f5802019-01-03 08:10:14 +01004922 msgf = (h2c->dff & H2_F_HEADERS_END_STREAM) ? 0 : H2_MSGF_BODY;
Christopher Fauletd0db4232021-01-22 11:46:30 +01004923 msgf |= (*flags & H2_SF_BODY_TUNNEL) ? H2_MSGF_BODY_TUNNEL: 0;
Amaury Denoyelle74162742020-12-11 17:53:05 +01004924 /* If an Extended CONNECT has been sent on this stream, set message flag
Ilya Shipitsinacf84592021-02-06 22:29:08 +05004925 * to convert 200 response to 101 htx response */
Amaury Denoyelle74162742020-12-11 17:53:05 +01004926 msgf |= (*flags & H2_SF_EXT_CONNECT_SENT) ? H2_MSGF_EXT_CONNECT: 0;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004927
Willy Tarreau88d138e2019-01-02 19:38:14 +01004928 if (*flags & H2_SF_HEADERS_RCVD)
4929 goto trailers;
4930
4931 /* This is the first HEADERS frame so it's a headers block */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004932 if (h2c->flags & H2_CF_IS_BACK)
Amaury Denoyelle74162742020-12-11 17:53:05 +01004933 outlen = h2_make_htx_response(list, htx, &msgf, body_len, upgrade_protocol);
Christopher Faulet9b79a102019-07-15 11:22:56 +02004934 else
4935 outlen = h2_make_htx_request(list, htx, &msgf, body_len);
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004936
Christopher Faulet3d875582021-04-26 17:46:13 +02004937 if (outlen < 0 || htx_free_space(htx) < global.tune.maxrewrite) {
Willy Tarreau25919232019-01-03 14:48:18 +01004938 /* too large headers? this is a stream error only */
Christopher Faulet3d875582021-04-26 17:46:13 +02004939 TRACE_STATE("message headers too large", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2S_ERR|H2_EV_PROTO_ERR, h2c->conn);
4940 htx->flags |= HTX_FL_PARSING_ERROR;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004941 goto fail;
4942 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004943
Willy Tarreau174b06a2018-04-25 18:13:58 +02004944 if (msgf & H2_MSGF_BODY) {
4945 /* a payload is present */
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004946 if (msgf & H2_MSGF_BODY_CL) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004947 *flags |= H2_SF_DATA_CLEN;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004948 htx->extra = *body_len;
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004949 }
Willy Tarreau174b06a2018-04-25 18:13:58 +02004950 }
Christopher Faulet7d247f02020-12-02 14:26:36 +01004951 if (msgf & H2_MSGF_BODYLESS_RSP)
4952 *flags |= H2_SF_BODYLESS_RESP;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004953
Christopher Fauletd0db4232021-01-22 11:46:30 +01004954 if (msgf & H2_MSGF_BODY_TUNNEL)
4955 *flags |= H2_SF_BODY_TUNNEL;
4956 else {
4957 /* Abort the tunnel attempt, if any */
4958 if (*flags & H2_SF_BODY_TUNNEL)
4959 *flags |= H2_SF_TUNNEL_ABRT;
4960 *flags &= ~H2_SF_BODY_TUNNEL;
4961 }
4962
Willy Tarreau88d138e2019-01-02 19:38:14 +01004963 done:
Christopher Faulet0b465482019-02-19 15:14:23 +01004964 /* indicate that a HEADERS frame was received for this stream, except
4965 * for 1xx responses. For 1xx responses, another HEADERS frame is
4966 * expected.
4967 */
4968 if (!(msgf & H2_MSGF_RSP_1XX))
4969 *flags |= H2_SF_HEADERS_RCVD;
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004970
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004971 if (h2c->dff & H2_F_HEADERS_END_STREAM) {
Christopher Faulet827a6292022-12-22 09:47:01 +01004972 if (msgf & H2_MSGF_RSP_1XX) {
4973 /* RFC9113#8.1 : HEADERS frame with the ES flag set that carries an informational status code is malformed */
4974 TRACE_STATE("invalid interim response with ES flag!", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn);
4975 goto fail;
4976 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01004977 /* no more data are expected for this message */
4978 htx->flags |= HTX_FL_EOM;
Christopher Faulet1a60a662023-05-24 11:02:50 +02004979 *flags |= H2_SF_ES_RCVD;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004980 }
Willy Tarreau937f7602018-02-26 15:22:17 +01004981
Amaury Denoyelleefe22762020-12-11 17:53:08 +01004982 if (msgf & H2_MSGF_EXT_CONNECT)
4983 *flags |= H2_SF_EXT_CONNECT_RCVD;
4984
Willy Tarreau86277d42019-01-02 15:36:11 +01004985 /* success */
4986 ret = 1;
4987
Willy Tarreau68dd9852017-07-03 14:44:26 +02004988 leave:
Willy Tarreau86277d42019-01-02 15:36:11 +01004989 /* If there is a hole left and it's not at the end, we are forced to
Willy Tarreauea18f862018-12-22 20:19:26 +01004990 * move the remaining data over it.
4991 */
4992 if (hole) {
4993 if (b_data(&h2c->dbuf) > h2c->dfl + hole)
4994 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole),
4995 b_data(&h2c->dbuf) - (h2c->dfl + hole), -hole);
4996 b_sub(&h2c->dbuf, hole);
4997 }
4998
Christopher Faulet07f88d72021-04-21 10:39:53 +02004999 if (b_full(&h2c->dbuf) && h2c->dfl) {
Willy Tarreauea18f862018-12-22 20:19:26 +01005000 /* too large frames */
5001 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau86277d42019-01-02 15:36:11 +01005002 ret = -1;
Willy Tarreauea18f862018-12-22 20:19:26 +01005003 }
5004
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005005 if (htx)
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01005006 htx_to_buf(htx, rxbuf);
Willy Tarreau68dd9852017-07-03 14:44:26 +02005007 free_trash_chunk(copy);
Willy Tarreau7838a792019-08-12 18:42:03 +02005008 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau86277d42019-01-02 15:36:11 +01005009 return ret;
5010
Willy Tarreau68dd9852017-07-03 14:44:26 +02005011 fail:
Willy Tarreau86277d42019-01-02 15:36:11 +01005012 ret = -1;
Willy Tarreau68dd9852017-07-03 14:44:26 +02005013 goto leave;
Willy Tarreau88d138e2019-01-02 19:38:14 +01005014
5015 trailers:
5016 /* This is the last HEADERS frame hence a trailer */
Willy Tarreau88d138e2019-01-02 19:38:14 +01005017 if (!(h2c->dff & H2_F_HEADERS_END_STREAM)) {
5018 /* It's a trailer but it's missing ES flag */
Willy Tarreau7838a792019-08-12 18:42:03 +02005019 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 +01005020 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau4781b152021-04-06 13:53:36 +02005021 HA_ATOMIC_INC(&h2c->px_counters->conn_proto_err);
Willy Tarreau88d138e2019-01-02 19:38:14 +01005022 goto fail;
5023 }
5024
Christopher Faulet9b79a102019-07-15 11:22:56 +02005025 /* Trailers terminate a DATA sequence */
Willy Tarreau7838a792019-08-12 18:42:03 +02005026 if (h2_make_htx_trailers(list, htx) <= 0) {
5027 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 +02005028 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005029 }
Christopher Faulet1a60a662023-05-24 11:02:50 +02005030 *flags |= H2_SF_ES_RCVD;
Willy Tarreau88d138e2019-01-02 19:38:14 +01005031 goto done;
Willy Tarreau13278b42017-10-13 19:23:14 +02005032}
5033
Christopher Faulet9b79a102019-07-15 11:22:56 +02005034/* Transfer the payload of a DATA frame to the HTTP/1 side. The HTTP/2 frame
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005035 * parser state is automatically updated. Returns > 0 if it could completely
5036 * send the current frame, 0 if it couldn't complete, in which case
Willy Tarreaub605c422022-05-17 17:04:55 +02005037 * SE_FL_RCV_MORE must be checked to know if some data remain pending (an empty
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005038 * DATA frame can return 0 as a valid result). Stream errors are reported in
5039 * h2s->errcode and connection errors in h2c->errcode. The caller must already
5040 * have checked the frame header and ensured that the frame was complete or the
5041 * buffer full. It changes the frame state to FRAME_A once done.
Willy Tarreau454f9052017-10-26 19:40:35 +02005042 */
Willy Tarreau454b57b2018-02-26 15:50:05 +01005043static int h2_frt_transfer_data(struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02005044{
5045 struct h2c *h2c = h2s->h2c;
Christopher Faulet9b79a102019-07-15 11:22:56 +02005046 int block;
Willy Tarreaud755ea62018-02-26 15:44:54 +01005047 unsigned int flen = 0;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005048 struct htx *htx = NULL;
Willy Tarreau7cb9e6c2022-05-17 19:40:40 +02005049 struct buffer *scbuf;
Christopher Faulet9b79a102019-07-15 11:22:56 +02005050 unsigned int sent;
Willy Tarreau454f9052017-10-26 19:40:35 +02005051
Willy Tarreau7838a792019-08-12 18:42:03 +02005052 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
5053
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005054 h2c->flags &= ~H2_CF_DEM_SFULL;
Willy Tarreau454f9052017-10-26 19:40:35 +02005055
Willy Tarreau7cb9e6c2022-05-17 19:40:40 +02005056 scbuf = h2_get_buf(h2c, &h2s->rxbuf);
5057 if (!scbuf) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01005058 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02005059 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 +01005060 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01005061 }
Willy Tarreau7cb9e6c2022-05-17 19:40:40 +02005062 htx = htx_from_buf(scbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01005063
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005064try_again:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005065 flen = h2c->dfl - h2c->dpl;
5066 if (!flen)
Willy Tarreau4a28da12018-01-04 14:41:00 +01005067 goto end_transfer;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005068
Willy Tarreauc9fa0482018-07-10 17:43:27 +02005069 if (flen > b_data(&h2c->dbuf)) {
5070 flen = b_data(&h2c->dbuf);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005071 if (!flen)
Willy Tarreau454b57b2018-02-26 15:50:05 +01005072 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01005073 }
5074
Christopher Faulet9b79a102019-07-15 11:22:56 +02005075 block = htx_free_data_space(htx);
5076 if (!block) {
5077 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005078 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 +02005079 goto fail;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005080 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02005081 if (flen > block)
5082 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005083
Christopher Faulet9b79a102019-07-15 11:22:56 +02005084 /* here, flen is the max we can copy into the output buffer */
5085 block = b_contig_data(&h2c->dbuf, 0);
5086 if (flen > block)
5087 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005088
Christopher Faulet9b79a102019-07-15 11:22:56 +02005089 sent = htx_add_data(htx, ist2(b_head(&h2c->dbuf), flen));
Willy Tarreau022e5e52020-09-10 09:33:15 +02005090 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 +02005091
Christopher Faulet9b79a102019-07-15 11:22:56 +02005092 b_del(&h2c->dbuf, sent);
5093 h2c->dfl -= sent;
5094 h2c->rcvd_c += sent;
5095 h2c->rcvd_s += sent; // warning, this can also affect the closed streams!
Willy Tarreau454f9052017-10-26 19:40:35 +02005096
Christopher Faulet9b79a102019-07-15 11:22:56 +02005097 if (h2s->flags & H2_SF_DATA_CLEN) {
5098 h2s->body_len -= sent;
5099 htx->extra = h2s->body_len;
Willy Tarreaueba10f22018-04-25 20:44:22 +02005100 }
5101
Christopher Faulet9b79a102019-07-15 11:22:56 +02005102 if (sent < flen) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01005103 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005104 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 +01005105 goto fail;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005106 }
5107
Christopher Faulet9b79a102019-07-15 11:22:56 +02005108 goto try_again;
5109
Willy Tarreau4a28da12018-01-04 14:41:00 +01005110 end_transfer:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01005111 /* here we're done with the frame, all the payload (except padding) was
5112 * transferred.
5113 */
Willy Tarreaueba10f22018-04-25 20:44:22 +02005114
Christopher Faulet5be651d2021-01-22 15:28:03 +01005115 if (!(h2s->flags & H2_SF_BODY_TUNNEL) && (h2c->dff & H2_F_DATA_END_STREAM)) {
5116 /* no more data are expected for this message. This add the EOM
5117 * flag but only on the response path or if no tunnel attempt
5118 * was aborted. Otherwise (request path + tunnel abrted), the
5119 * EOM was already reported.
5120 */
Christopher Faulet33724322021-02-10 09:04:59 +01005121 if ((h2c->flags & H2_CF_IS_BACK) || !(h2s->flags & H2_SF_TUNNEL_ABRT)) {
Amaury Denoyelle25cf19d2023-05-11 16:50:04 +02005122 /* htx may be empty if receiving an empty DATA frame. */
5123 if (!htx_set_eom(htx))
5124 goto fail;
Christopher Faulet33724322021-02-10 09:04:59 +01005125 }
Willy Tarreaueba10f22018-04-25 20:44:22 +02005126 }
5127
Willy Tarreaud1023bb2018-03-22 16:53:12 +01005128 h2c->rcvd_c += h2c->dpl;
5129 h2c->rcvd_s += h2c->dpl;
5130 h2c->dpl = 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02005131 h2c->st0 = H2_CS_FRAME_A; // send the corresponding window update
Willy Tarreau7cb9e6c2022-05-17 19:40:40 +02005132 htx_to_buf(htx, scbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02005133 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01005134 return 1;
Willy Tarreau454b57b2018-02-26 15:50:05 +01005135 fail:
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005136 if (htx)
Willy Tarreau7cb9e6c2022-05-17 19:40:40 +02005137 htx_to_buf(htx, scbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02005138 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454b57b2018-02-26 15:50:05 +01005139 return 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02005140}
5141
Willy Tarreau115e83b2018-12-01 19:17:53 +01005142/* Try to send a HEADERS frame matching HTX response present in HTX message
5143 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
5144 * must check the stream's status to detect any error which might have happened
5145 * subsequently to a successful send. The htx blocks are automatically removed
5146 * from the message. The htx message is assumed to be valid since produced from
5147 * the internal code, hence it contains a start line, an optional series of
5148 * header blocks and an end of header, otherwise an invalid frame could be
5149 * emitted and the resulting htx message could be left in an inconsistent state.
5150 */
Willy Tarreau7cfbb812023-01-26 16:02:01 +01005151static size_t h2s_snd_fhdrs(struct h2s *h2s, struct htx *htx)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005152{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005153 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau115e83b2018-12-01 19:17:53 +01005154 struct h2c *h2c = h2s->h2c;
5155 struct htx_blk *blk;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005156 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005157 struct buffer *mbuf;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005158 struct htx_sl *sl;
5159 enum htx_blk_type type;
5160 int es_now = 0;
5161 int ret = 0;
5162 int hdr;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005163
Willy Tarreau7838a792019-08-12 18:42:03 +02005164 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5165
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005166 /* get the start line (we do have one) and the rest of the headers,
5167 * that we dump starting at header 0 */
5168 sl = NULL;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005169 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005170 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau115e83b2018-12-01 19:17:53 +01005171 type = htx_get_blk_type(blk);
5172
5173 if (type == HTX_BLK_UNUSED)
5174 continue;
5175
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005176 if (type == HTX_BLK_EOH)
Willy Tarreau115e83b2018-12-01 19:17:53 +01005177 break;
5178
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005179 if (type == HTX_BLK_HDR) {
Christopher Faulet56498132021-01-29 11:39:43 +01005180 BUG_ON(!sl); /* The start-line mut be defined before any headers */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005181 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5182 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5183 goto fail;
5184 }
5185
5186 list[hdr].n = htx_get_blk_name(htx, blk);
5187 list[hdr].v = htx_get_blk_value(htx, blk);
5188 hdr++;
5189 }
5190 else if (type == HTX_BLK_RES_SL) {
Christopher Faulet56498132021-01-29 11:39:43 +01005191 BUG_ON(sl); /* Only one start-line expected */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005192 sl = htx_get_blk_ptr(htx, blk);
5193 h2s->status = sl->info.res.status;
Christopher Faulet7d247f02020-12-02 14:26:36 +01005194 if (h2s->status == 204 || h2s->status == 304)
5195 h2s->flags |= H2_SF_BODYLESS_RESP;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005196 if (h2s->status < 100 || h2s->status > 999) {
5197 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5198 goto fail;
5199 }
5200 else if (h2s->status == 101) {
Amaury Denoyelleefe22762020-12-11 17:53:08 +01005201 if (unlikely(h2s->flags & H2_SF_EXT_CONNECT_RCVD)) {
5202 /* If an Extended CONNECT has been received, we need to convert 101 to 200 */
5203 h2s->status = 200;
5204 h2s->flags &= ~H2_SF_EXT_CONNECT_RCVD;
5205 }
5206 else {
5207 /* Otherwise, 101 responses are not supported in H2, so return a error (RFC7540#8.1.1) */
5208 TRACE_ERROR("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5209 goto fail;
5210 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005211 }
5212 else if ((h2s->flags & H2_SF_BODY_TUNNEL) && h2s->status >= 300) {
5213 /* Abort the tunnel attempt */
5214 h2s->flags &= ~H2_SF_BODY_TUNNEL;
5215 h2s->flags |= H2_SF_TUNNEL_ABRT;
5216 }
5217 }
5218 else {
5219 TRACE_ERROR("will not encode unexpected htx block", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005220 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005221 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005222 }
5223
Christopher Faulet56498132021-01-29 11:39:43 +01005224 /* The start-line me be defined */
5225 BUG_ON(!sl);
5226
Willy Tarreau115e83b2018-12-01 19:17:53 +01005227 /* marker for end of headers */
5228 list[hdr].n = ist("");
5229
Willy Tarreau9c218e72019-05-26 10:08:28 +02005230 mbuf = br_tail(h2c->mbuf);
5231 retry:
5232 if (!h2_get_buf(h2c, mbuf)) {
5233 h2c->flags |= H2_CF_MUX_MALLOC;
5234 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005235 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 +02005236 return 0;
5237 }
5238
Willy Tarreau115e83b2018-12-01 19:17:53 +01005239 chunk_reset(&outbuf);
5240
5241 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005242 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5243 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005244 break;
5245 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005246 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau115e83b2018-12-01 19:17:53 +01005247 }
5248
5249 if (outbuf.size < 9)
5250 goto full;
5251
5252 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5253 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5254 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5255 outbuf.data = 9;
5256
Willy Tarreau39a0a1e2022-01-13 16:00:12 +01005257 if ((h2c->flags & (H2_CF_SHTS_UPDATED|H2_CF_DTSU_EMITTED)) == H2_CF_SHTS_UPDATED) {
5258 /* SETTINGS_HEADER_TABLE_SIZE changed, we must send an HPACK
5259 * dynamic table size update so that some clients are not
5260 * confused. In practice we only need to send the DTSU when the
5261 * advertised size is lower than the current one, and since we
5262 * don't use it and don't care about the default 4096 bytes,
5263 * we only ack it with a zero size thus we at most have to deal
5264 * with this once. See RFC7541#4.2 and #6.3 for the spec, and
5265 * below for the whole context and interoperability risks:
5266 * https://lists.w3.org/Archives/Public/ietf-http-wg/2021OctDec/0235.html
5267 */
5268 if (b_room(&outbuf) < 1)
5269 goto full;
5270 outbuf.area[outbuf.data++] = 0x20; // HPACK DTSU 0 bytes
5271
5272 /* let's not update the flags now but only once the buffer is
5273 * really committed.
5274 */
5275 }
5276
Willy Tarreau115e83b2018-12-01 19:17:53 +01005277 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01005278 if (!hpack_encode_int_status(&outbuf, h2s->status)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005279 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005280 goto realign_again;
5281 goto full;
5282 }
5283
Willy Tarreau11e8a8c2023-01-24 19:43:11 +01005284 if ((TRACE_SOURCE)->verbosity >= H2_VERB_ADVANCED) {
5285 char sts[4];
5286
5287 h2_trace_header(ist(":status"), ist(ultoa_r(h2s->status, sts, sizeof(sts))),
5288 H2_EV_TX_FRAME|H2_EV_TX_HDR, ist(TRC_LOC), __FUNCTION__,
5289 h2c, h2s);
5290 }
5291
Willy Tarreau115e83b2018-12-01 19:17:53 +01005292 /* encode all headers, stop at empty name */
5293 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
5294 /* these ones do not exist in H2 and must be dropped. */
5295 if (isteq(list[hdr].n, ist("connection")) ||
5296 isteq(list[hdr].n, ist("proxy-connection")) ||
5297 isteq(list[hdr].n, ist("keep-alive")) ||
5298 isteq(list[hdr].n, ist("upgrade")) ||
5299 isteq(list[hdr].n, ist("transfer-encoding")))
5300 continue;
5301
Christopher Faulet86d144c2019-08-14 16:32:25 +02005302 /* Skip all pseudo-headers */
5303 if (*(list[hdr].n.ptr) == ':')
5304 continue;
5305
Willy Tarreau115e83b2018-12-01 19:17:53 +01005306 if (isteq(list[hdr].n, ist("")))
5307 break; // end
5308
Willy Tarreau11e8a8c2023-01-24 19:43:11 +01005309 if (!h2_encode_header(&outbuf, list[hdr].n, list[hdr].v, H2_EV_TX_FRAME|H2_EV_TX_HDR,
5310 ist(TRC_LOC), __FUNCTION__, h2c, h2s)) {
Willy Tarreau115e83b2018-12-01 19:17:53 +01005311 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005312 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01005313 goto realign_again;
5314 goto full;
5315 }
5316 }
5317
Willy Tarreaucb985a42019-10-07 16:56:34 +02005318 /* update the frame's size */
5319 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5320
5321 if (outbuf.data > h2c->mfs + 9) {
5322 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5323 /* output full */
5324 if (b_space_wraps(mbuf))
5325 goto realign_again;
5326 goto full;
5327 }
5328 }
5329
Willy Tarreau3a537072021-06-17 08:40:04 +02005330 TRACE_USER("sent H2 response ", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
5331
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005332 /* remove all header blocks including the EOH and compute the
5333 * corresponding size.
Willy Tarreau115e83b2018-12-01 19:17:53 +01005334 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005335 ret = 0;
5336 blk = htx_get_head_blk(htx);
5337 while (blk) {
5338 type = htx_get_blk_type(blk);
5339 ret += htx_get_blksz(blk);
5340 blk = htx_remove_blk(htx, blk);
5341 /* The removed block is the EOH */
5342 if (type == HTX_BLK_EOH)
5343 break;
Christopher Faulet5be651d2021-01-22 15:28:03 +01005344 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005345
Willy Tarreau95acc8b2022-05-27 16:14:10 +02005346 if (!h2s_sc(h2s) || se_fl_test(h2s->sd, SE_FL_SHW)) {
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005347 /* Response already closed: add END_STREAM */
5348 es_now = 1;
5349 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005350 else if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx) && h2s->status >= 200) {
5351 /* EOM+empty: we may need to add END_STREAM except for 1xx
Christopher Faulet991febd2020-12-02 15:17:31 +01005352 * responses and tunneled response.
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005353 */
Christopher Faulet991febd2020-12-02 15:17:31 +01005354 if (!(h2s->flags & H2_SF_BODY_TUNNEL) || h2s->status >= 300)
5355 es_now = 1;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005356 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01005357
Willy Tarreau115e83b2018-12-01 19:17:53 +01005358 if (es_now)
5359 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5360
5361 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005362 b_add(mbuf, outbuf.data);
Christopher Faulet0b465482019-02-19 15:14:23 +01005363
5364 /* indicates the HEADERS frame was sent, except for 1xx responses. For
5365 * 1xx responses, another HEADERS frame is expected.
5366 */
Christopher Faulet89899422020-12-07 18:24:43 +01005367 if (h2s->status >= 200)
Christopher Faulet0b465482019-02-19 15:14:23 +01005368 h2s->flags |= H2_SF_HEADERS_SENT;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005369
Willy Tarreau39a0a1e2022-01-13 16:00:12 +01005370 if (h2c->flags & H2_CF_SHTS_UPDATED) {
5371 /* was sent above */
5372 h2c->flags |= H2_CF_DTSU_EMITTED;
Willy Tarreauc7d85482022-02-16 14:28:14 +01005373 h2c->flags &= ~H2_CF_SHTS_UPDATED;
Willy Tarreau39a0a1e2022-01-13 16:00:12 +01005374 }
5375
Willy Tarreau115e83b2018-12-01 19:17:53 +01005376 if (es_now) {
5377 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005378 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 +01005379 if (h2s->st == H2_SS_OPEN)
5380 h2s->st = H2_SS_HLOC;
5381 else
5382 h2s_close(h2s);
5383 }
5384
5385 /* OK we could properly deliver the response */
Willy Tarreau115e83b2018-12-01 19:17:53 +01005386 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005387 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005388 return ret;
5389 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005390 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5391 goto retry;
Willy Tarreau115e83b2018-12-01 19:17:53 +01005392 h2c->flags |= H2_CF_MUX_MFULL;
5393 h2s->flags |= H2_SF_BLK_MROOM;
5394 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005395 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 +01005396 goto end;
5397 fail:
5398 /* unparsable HTX messages, too large ones to be produced in the local
5399 * list etc go here (unrecoverable errors).
5400 */
5401 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5402 ret = 0;
5403 goto end;
5404}
5405
Willy Tarreau80739692018-10-05 11:35:57 +02005406/* Try to send a HEADERS frame matching HTX request present in HTX message
5407 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
5408 * must check the stream's status to detect any error which might have happened
5409 * subsequently to a successful send. The htx blocks are automatically removed
5410 * from the message. The htx message is assumed to be valid since produced from
5411 * the internal code, hence it contains a start line, an optional series of
5412 * header blocks and an end of header, otherwise an invalid frame could be
5413 * emitted and the resulting htx message could be left in an inconsistent state.
5414 */
Willy Tarreau7cfbb812023-01-26 16:02:01 +01005415static size_t h2s_snd_bhdrs(struct h2s *h2s, struct htx *htx)
Willy Tarreau80739692018-10-05 11:35:57 +02005416{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005417 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau80739692018-10-05 11:35:57 +02005418 struct h2c *h2c = h2s->h2c;
5419 struct htx_blk *blk;
Willy Tarreau80739692018-10-05 11:35:57 +02005420 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005421 struct buffer *mbuf;
Willy Tarreau80739692018-10-05 11:35:57 +02005422 struct htx_sl *sl;
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005423 struct ist meth, uri, auth, host = IST_NULL;
Willy Tarreau80739692018-10-05 11:35:57 +02005424 enum htx_blk_type type;
5425 int es_now = 0;
5426 int ret = 0;
5427 int hdr;
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005428 int extended_connect = 0;
Willy Tarreau80739692018-10-05 11:35:57 +02005429
Willy Tarreau7838a792019-08-12 18:42:03 +02005430 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5431
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005432 /* get the start line (we do have one) and the rest of the headers,
5433 * that we dump starting at header 0 */
5434 sl = NULL;
Willy Tarreau80739692018-10-05 11:35:57 +02005435 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005436 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005437 type = htx_get_blk_type(blk);
5438
5439 if (type == HTX_BLK_UNUSED)
5440 continue;
5441
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005442 if (type == HTX_BLK_EOH)
Willy Tarreau80739692018-10-05 11:35:57 +02005443 break;
5444
Christopher Fauletc29b4bf2021-01-29 11:49:16 +01005445 if (type == HTX_BLK_HDR) {
Christopher Faulet56498132021-01-29 11:39:43 +01005446 BUG_ON(!sl); /* The start-line mut be defined before any headers */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005447 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5448 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5449 goto fail;
5450 }
Willy Tarreau80739692018-10-05 11:35:57 +02005451
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005452 list[hdr].n = htx_get_blk_name(htx, blk);
5453 list[hdr].v = htx_get_blk_value(htx, blk);
Christopher Faulet67d58092019-10-02 10:51:38 +02005454
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005455 /* Skip header if same name is used to add the server name */
Tim Duesterhusb4b03772022-03-05 00:52:43 +01005456 if ((h2c->flags & H2_CF_IS_BACK) && isttest(h2c->proxy->server_id_hdr_name) &&
5457 isteq(list[hdr].n, h2c->proxy->server_id_hdr_name))
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005458 continue;
Christopher Faulet67d58092019-10-02 10:51:38 +02005459
Ilya Shipitsinacf84592021-02-06 22:29:08 +05005460 /* Convert connection: upgrade to Extended connect from rfc 8441 */
Christopher Faulet52a5ec22021-09-09 09:52:51 +02005461 if ((sl->flags & HTX_SL_F_CONN_UPG) && isteqi(list[hdr].n, ist("connection"))) {
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005462 /* rfc 7230 #6.1 Connection = list of tokens */
5463 struct ist connection_ist = list[hdr].v;
5464 do {
5465 if (isteqi(iststop(connection_ist, ','),
5466 ist("upgrade"))) {
Amaury Denoyelle0df04362021-10-18 09:43:29 +02005467 if (!(h2c->flags & H2_CF_RCVD_RFC8441)) {
5468 TRACE_STATE("reject upgrade because of no RFC8441 support", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5469 goto fail;
5470 }
5471
Amaury Denoyellee0c258c2021-10-18 10:05:16 +02005472 TRACE_STATE("convert upgrade to extended connect method", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005473 h2s->flags |= (H2_SF_BODY_TUNNEL|H2_SF_EXT_CONNECT_SENT);
5474 sl->info.req.meth = HTTP_METH_CONNECT;
5475 meth = ist("CONNECT");
5476
5477 extended_connect = 1;
5478 break;
5479 }
5480
5481 connection_ist = istadv(istfind(connection_ist, ','), 1);
5482 } while (istlen(connection_ist));
5483 }
5484
Christopher Faulet52a5ec22021-09-09 09:52:51 +02005485 if ((sl->flags & HTX_SL_F_CONN_UPG) && isteq(list[hdr].n, ist("upgrade"))) {
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005486 /* rfc 7230 #6.7 Upgrade = list of protocols
5487 * rfc 8441 #4 Extended connect = :protocol is single-valued
5488 *
5489 * only first HTTP/1 protocol is preserved
5490 */
5491 const struct ist protocol = iststop(list[hdr].v, ',');
5492 /* upgrade_protocol field is 16 bytes long in h2s */
5493 istpad(h2s->upgrade_protocol, isttrim(protocol, 15));
5494 }
5495
5496 if (isteq(list[hdr].n, ist("host")))
5497 host = list[hdr].v;
5498
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005499 hdr++;
5500 }
Christopher Fauletc29b4bf2021-01-29 11:49:16 +01005501 else if (type == HTX_BLK_REQ_SL) {
5502 BUG_ON(sl); /* Only one start-line expected */
5503 sl = htx_get_blk_ptr(htx, blk);
5504 meth = htx_sl_req_meth(sl);
5505 uri = htx_sl_req_uri(sl);
5506 if (sl->info.req.meth == HTTP_METH_HEAD)
5507 h2s->flags |= H2_SF_BODYLESS_RESP;
5508 if (unlikely(uri.len == 0)) {
5509 TRACE_ERROR("no URI in HTX request", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5510 goto fail;
5511 }
5512 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005513 else {
5514 TRACE_ERROR("will not encode unexpected htx block", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
5515 goto fail;
5516 }
Willy Tarreau80739692018-10-05 11:35:57 +02005517 }
5518
Christopher Faulet56498132021-01-29 11:39:43 +01005519 /* The start-line me be defined */
5520 BUG_ON(!sl);
5521
Christopher Faulet72ba6cd2019-09-24 16:20:05 +02005522 /* Now add the server name to a header (if requested) */
Tim Duesterhusb4b03772022-03-05 00:52:43 +01005523 if ((h2c->flags & H2_CF_IS_BACK) && isttest(h2c->proxy->server_id_hdr_name)) {
Christopher Faulet72ba6cd2019-09-24 16:20:05 +02005524 struct server *srv = objt_server(h2c->conn->target);
5525
5526 if (srv) {
Tim Duesterhusb4b03772022-03-05 00:52:43 +01005527 list[hdr].n = h2c->proxy->server_id_hdr_name;
Christopher Faulet72ba6cd2019-09-24 16:20:05 +02005528 list[hdr].v = ist(srv->id);
5529 hdr++;
5530 }
5531 }
5532
Willy Tarreau80739692018-10-05 11:35:57 +02005533 /* marker for end of headers */
5534 list[hdr].n = ist("");
5535
Willy Tarreau9c218e72019-05-26 10:08:28 +02005536 mbuf = br_tail(h2c->mbuf);
5537 retry:
5538 if (!h2_get_buf(h2c, mbuf)) {
5539 h2c->flags |= H2_CF_MUX_MALLOC;
5540 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005541 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 +02005542 return 0;
5543 }
5544
Willy Tarreau80739692018-10-05 11:35:57 +02005545 chunk_reset(&outbuf);
5546
5547 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005548 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5549 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005550 break;
5551 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005552 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau80739692018-10-05 11:35:57 +02005553 }
5554
5555 if (outbuf.size < 9)
5556 goto full;
5557
5558 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
5559 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
5560 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5561 outbuf.data = 9;
5562
5563 /* encode the method, which necessarily is the first one */
Willy Tarreaubdabc3a2018-12-10 18:25:11 +01005564 if (!hpack_encode_method(&outbuf, sl->info.req.meth, meth)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005565 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005566 goto realign_again;
5567 goto full;
5568 }
5569
Willy Tarreau11e8a8c2023-01-24 19:43:11 +01005570 h2_trace_header(ist(":method"), meth, H2_EV_TX_FRAME|H2_EV_TX_HDR, ist(TRC_LOC), __FUNCTION__, h2c, h2s);
5571
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005572 auth = ist(NULL);
5573
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005574 /* RFC7540 #8.3: the CONNECT method must have :
5575 * - :authority set to the URI part (host:port)
5576 * - :method set to CONNECT
5577 * - :scheme and :path omitted
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005578 *
5579 * Note that this is not applicable in case of the Extended CONNECT
5580 * protocol from rfc 8441.
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005581 */
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005582 if (unlikely(sl->info.req.meth == HTTP_METH_CONNECT) && !extended_connect) {
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005583 auth = uri;
5584
Willy Tarreau11e8a8c2023-01-24 19:43:11 +01005585 if (!h2_encode_header(&outbuf, ist(":authority"), auth, H2_EV_TX_FRAME|H2_EV_TX_HDR,
5586 ist(TRC_LOC), __FUNCTION__, h2c, h2s)) {
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005587 /* output full */
5588 if (b_space_wraps(mbuf))
5589 goto realign_again;
5590 goto full;
5591 }
Willy Tarreau11e8a8c2023-01-24 19:43:11 +01005592
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005593 h2s->flags |= H2_SF_BODY_TUNNEL;
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005594 } else {
5595 /* other methods need a :scheme. If an authority is known from
5596 * the request line, it must be sent, otherwise only host is
5597 * sent. Host is never sent as the authority.
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005598 *
5599 * This code is also applicable for Extended CONNECT protocol
5600 * from rfc 8441.
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005601 */
5602 struct ist scheme = { };
Christopher Faulet3b44c542019-06-14 10:46:51 +02005603
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005604 if (uri.ptr[0] != '/' && uri.ptr[0] != '*') {
5605 /* the URI seems to start with a scheme */
5606 int len = 1;
5607
5608 while (len < uri.len && uri.ptr[len] != ':')
5609 len++;
5610
5611 if (len + 2 < uri.len && uri.ptr[len + 1] == '/' && uri.ptr[len + 2] == '/') {
5612 /* make the uri start at the authority now */
Tim Duesterhus9f75ed12021-03-02 18:57:26 +01005613 scheme = ist2(uri.ptr, len);
Tim Duesterhus154374c2021-03-02 18:57:27 +01005614 uri = istadv(uri, len + 3);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005615
5616 /* find the auth part of the URI */
Tim Duesterhus92c696e2021-02-28 16:11:36 +01005617 auth = ist2(uri.ptr, 0);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005618 while (auth.len < uri.len && auth.ptr[auth.len] != '/')
5619 auth.len++;
5620
Tim Duesterhus154374c2021-03-02 18:57:27 +01005621 uri = istadv(uri, auth.len);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005622 }
5623 }
5624
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005625 /* For Extended CONNECT, the :authority must be present.
5626 * Use host value for it.
5627 */
5628 if (unlikely(extended_connect) && isttest(host))
5629 auth = host;
5630
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005631 if (!scheme.len) {
5632 /* no explicit scheme, we're using an origin-form URI,
5633 * probably from an H1 request transcoded to H2 via an
5634 * external layer, then received as H2 without authority.
5635 * So we have to look up the scheme from the HTX flags.
5636 * In such a case only http and https are possible, and
5637 * https is the default (sent by browsers).
5638 */
5639 if ((sl->flags & (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP)) == (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP))
5640 scheme = ist("http");
5641 else
5642 scheme = ist("https");
5643 }
Christopher Faulet3b44c542019-06-14 10:46:51 +02005644
5645 if (!hpack_encode_scheme(&outbuf, scheme)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005646 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005647 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005648 goto realign_again;
5649 goto full;
5650 }
Willy Tarreau80739692018-10-05 11:35:57 +02005651
Willy Tarreau11e8a8c2023-01-24 19:43:11 +01005652 if (auth.len &&
5653 !h2_encode_header(&outbuf, ist(":authority"), auth, H2_EV_TX_FRAME|H2_EV_TX_HDR,
5654 ist(TRC_LOC), __FUNCTION__, h2c, h2s)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005655 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005656 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01005657 goto realign_again;
5658 goto full;
5659 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005660
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005661 /* encode the path. RFC7540#8.1.2.3: if path is empty it must
5662 * be sent as '/' or '*'.
5663 */
5664 if (unlikely(!uri.len)) {
5665 if (sl->info.req.meth == HTTP_METH_OPTIONS)
5666 uri = ist("*");
5667 else
5668 uri = ist("/");
Willy Tarreau053c1572019-02-01 16:13:59 +01005669 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005670
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005671 if (!hpack_encode_path(&outbuf, uri)) {
5672 /* output full */
5673 if (b_space_wraps(mbuf))
5674 goto realign_again;
5675 goto full;
5676 }
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005677
Willy Tarreau11e8a8c2023-01-24 19:43:11 +01005678 h2_trace_header(ist(":path"), uri, H2_EV_TX_FRAME|H2_EV_TX_HDR, ist(TRC_LOC), __FUNCTION__, h2c, h2s);
5679
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005680 /* encode the pseudo-header protocol from rfc8441 if using
5681 * Extended CONNECT method.
5682 */
5683 if (unlikely(extended_connect)) {
5684 const struct ist protocol = ist(h2s->upgrade_protocol);
5685 if (isttest(protocol)) {
Willy Tarreau11e8a8c2023-01-24 19:43:11 +01005686 if (!h2_encode_header(&outbuf, ist(":protocol"), protocol, H2_EV_TX_FRAME|H2_EV_TX_HDR,
5687 ist(TRC_LOC), __FUNCTION__, h2c, h2s)) {
Amaury Denoyelle9bf95732020-12-11 17:53:06 +01005688 /* output full */
5689 if (b_space_wraps(mbuf))
5690 goto realign_again;
5691 goto full;
5692 }
5693 }
5694 }
Willy Tarreau80739692018-10-05 11:35:57 +02005695 }
5696
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005697 /* encode all headers, stop at empty name. Host is only sent if we
5698 * do not provide an authority.
5699 */
Willy Tarreau80739692018-10-05 11:35:57 +02005700 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005701 struct ist n = list[hdr].n;
5702 struct ist v = list[hdr].v;
5703
Willy Tarreau80739692018-10-05 11:35:57 +02005704 /* these ones do not exist in H2 and must be dropped. */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005705 if (isteq(n, ist("connection")) ||
5706 (auth.len && isteq(n, ist("host"))) ||
5707 isteq(n, ist("proxy-connection")) ||
5708 isteq(n, ist("keep-alive")) ||
5709 isteq(n, ist("upgrade")) ||
5710 isteq(n, ist("transfer-encoding")))
Willy Tarreau80739692018-10-05 11:35:57 +02005711 continue;
5712
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005713 if (isteq(n, ist("te"))) {
5714 /* "te" may only be sent with "trailers" if this value
5715 * is present, otherwise it must be deleted.
5716 */
5717 v = istist(v, ist("trailers"));
Tim Duesterhus7b5777d2021-03-02 18:57:28 +01005718 if (!isttest(v) || (v.len > 8 && v.ptr[8] != ','))
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005719 continue;
5720 v = ist("trailers");
5721 }
5722
Christopher Faulet86d144c2019-08-14 16:32:25 +02005723 /* Skip all pseudo-headers */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005724 if (*(n.ptr) == ':')
Christopher Faulet86d144c2019-08-14 16:32:25 +02005725 continue;
5726
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005727 if (isteq(n, ist("")))
Willy Tarreau80739692018-10-05 11:35:57 +02005728 break; // end
5729
Willy Tarreau11e8a8c2023-01-24 19:43:11 +01005730 if (!h2_encode_header(&outbuf, n, v, H2_EV_TX_FRAME|H2_EV_TX_HDR, ist(TRC_LOC), __FUNCTION__, h2c, h2s)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005731 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005732 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005733 goto realign_again;
5734 goto full;
5735 }
5736 }
5737
Willy Tarreaucb985a42019-10-07 16:56:34 +02005738 /* update the frame's size */
5739 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5740
5741 if (outbuf.data > h2c->mfs + 9) {
5742 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5743 /* output full */
5744 if (b_space_wraps(mbuf))
5745 goto realign_again;
5746 goto full;
5747 }
5748 }
5749
Willy Tarreau3a537072021-06-17 08:40:04 +02005750 TRACE_USER("sent H2 request ", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
5751
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005752 /* remove all header blocks including the EOH and compute the
5753 * corresponding size.
Willy Tarreau80739692018-10-05 11:35:57 +02005754 */
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005755 ret = 0;
5756 blk = htx_get_head_blk(htx);
5757 while (blk) {
5758 type = htx_get_blk_type(blk);
5759 ret += htx_get_blksz(blk);
5760 blk = htx_remove_blk(htx, blk);
5761 /* The removed block is the EOH */
5762 if (type == HTX_BLK_EOH)
5763 break;
Christopher Fauletd0db4232021-01-22 11:46:30 +01005764 }
Willy Tarreau80739692018-10-05 11:35:57 +02005765
Willy Tarreau95acc8b2022-05-27 16:14:10 +02005766 if (!h2s_sc(h2s) || se_fl_test(h2s->sd, SE_FL_SHW)) {
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005767 /* Request already closed: add END_STREAM */
Willy Tarreau80739692018-10-05 11:35:57 +02005768 es_now = 1;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005769 }
5770 if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx)) {
5771 /* EOM+empty: we may need to add END_STREAM (except for CONNECT
5772 * request)
5773 */
5774 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5775 es_now = 1;
5776 }
Willy Tarreau80739692018-10-05 11:35:57 +02005777
Willy Tarreau80739692018-10-05 11:35:57 +02005778 if (es_now)
5779 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5780
5781 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005782 b_add(mbuf, outbuf.data);
Willy Tarreau80739692018-10-05 11:35:57 +02005783 h2s->flags |= H2_SF_HEADERS_SENT;
5784 h2s->st = H2_SS_OPEN;
5785
Willy Tarreau80739692018-10-05 11:35:57 +02005786 if (es_now) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005787 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 +02005788 // trim any possibly pending data (eg: inconsistent content-length)
5789 h2s->flags |= H2_SF_ES_SENT;
5790 h2s->st = H2_SS_HLOC;
5791 }
5792
Willy Tarreau80739692018-10-05 11:35:57 +02005793 end:
5794 return ret;
5795 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005796 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5797 goto retry;
Willy Tarreau80739692018-10-05 11:35:57 +02005798 h2c->flags |= H2_CF_MUX_MFULL;
5799 h2s->flags |= H2_SF_BLK_MROOM;
5800 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005801 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 +02005802 goto end;
5803 fail:
5804 /* unparsable HTX messages, too large ones to be produced in the local
5805 * list etc go here (unrecoverable errors).
5806 */
5807 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5808 ret = 0;
5809 goto end;
5810}
5811
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005812/* Try to send a DATA frame matching HTTP response present in HTX structure
Willy Tarreau98de12a2018-12-12 07:03:00 +01005813 * present in <buf>, for stream <h2s>. Returns the number of bytes sent. The
5814 * caller must check the stream's status to detect any error which might have
5815 * happened subsequently to a successful send. Returns the number of data bytes
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005816 * consumed, or zero if nothing done.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005817 */
Christopher Faulet142854b2020-12-02 15:12:40 +01005818static size_t h2s_make_data(struct h2s *h2s, struct buffer *buf, size_t count)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005819{
5820 struct h2c *h2c = h2s->h2c;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005821 struct htx *htx;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005822 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005823 struct buffer *mbuf;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005824 size_t total = 0;
5825 int es_now = 0;
5826 int bsize; /* htx block size */
5827 int fsize; /* h2 frame size */
5828 struct htx_blk *blk;
5829 enum htx_blk_type type;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005830 int trunc_out; /* non-zero if truncated on out buf */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005831
Willy Tarreau7838a792019-08-12 18:42:03 +02005832 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5833
Willy Tarreau98de12a2018-12-12 07:03:00 +01005834 htx = htx_from_buf(buf);
5835
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005836 /* We only come here with HTX_BLK_DATA blocks */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005837
5838 new_frame:
Willy Tarreauee573762018-12-04 15:25:57 +01005839 if (!count || htx_is_empty(htx))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005840 goto end;
5841
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005842 if ((h2c->flags & H2_CF_IS_BACK) &&
Christopher Fauletf95f8762021-01-22 11:59:07 +01005843 (h2s->flags & (H2_SF_HEADERS_RCVD|H2_SF_BODY_TUNNEL)) == H2_SF_BODY_TUNNEL) {
5844 /* The response HEADERS frame not received yet. Thus the tunnel
5845 * is not fully established yet. In this situation, we block
5846 * data sending.
5847 */
5848 h2s->flags |= H2_SF_BLK_MBUSY;
5849 TRACE_STATE("Request DATA frame blocked waiting for tunnel establishment", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5850 goto end;
5851 }
Christopher Faulet91b21dc2021-01-22 12:13:15 +01005852 else if ((h2c->flags & H2_CF_IS_BACK) && (h2s->flags & H2_SF_TUNNEL_ABRT)) {
5853 /* a tunnel attempt was aborted but the is pending raw data to xfer to the server.
5854 * Thus the stream is closed with the CANCEL error. The error will be reported to
5855 * the upper layer as aserver abort. But at this stage there is nothing more we can
5856 * do. We just wait for the end of the response to be sure to not truncate it.
5857 */
5858 if (!(h2s->flags & H2_SF_ES_RCVD)) {
5859 TRACE_STATE("Request DATA frame blocked waiting end of aborted tunnel", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5860 h2s->flags |= H2_SF_BLK_MBUSY;
5861 }
5862 else {
5863 TRACE_ERROR("Request DATA frame for aborted tunnel", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
5864 h2s_error(h2s, H2_ERR_CANCEL);
5865 }
5866 goto end;
5867 }
Willy Tarreau98de12a2018-12-12 07:03:00 +01005868
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01005869 blk = htx_get_head_blk(htx);
5870 type = htx_get_blk_type(blk);
5871 bsize = htx_get_blksz(blk);
5872 fsize = bsize;
5873 trunc_out = 0;
5874 if (type != HTX_BLK_DATA)
5875 goto end;
5876
Willy Tarreau9c218e72019-05-26 10:08:28 +02005877 mbuf = br_tail(h2c->mbuf);
5878 retry:
5879 if (!h2_get_buf(h2c, mbuf)) {
5880 h2c->flags |= H2_CF_MUX_MALLOC;
5881 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005882 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 +02005883 goto end;
5884 }
5885
Willy Tarreau98de12a2018-12-12 07:03:00 +01005886 /* Perform some optimizations to reduce the number of buffer copies.
5887 * First, if the mux's buffer is empty and the htx area contains
5888 * exactly one data block of the same size as the requested count, and
5889 * this count fits within the frame size, the stream's window size, and
5890 * the connection's window size, then it's possible to simply swap the
5891 * caller's buffer with the mux's output buffer and adjust offsets and
5892 * length to match the entire DATA HTX block in the middle. In this
5893 * case we perform a true zero-copy operation from end-to-end. This is
5894 * the situation that happens all the time with large files. Second, if
5895 * this is not possible, but the mux's output buffer is empty, we still
5896 * have an opportunity to avoid the copy to the intermediary buffer, by
5897 * making the intermediary buffer's area point to the output buffer's
5898 * area. In this case we want to skip the HTX header to make sure that
5899 * copies remain aligned and that this operation remains possible all
5900 * the time. This goes for headers, data blocks and any data extracted
5901 * from the HTX blocks.
5902 */
5903 if (unlikely(fsize == count &&
Christopher Faulet192c6a22019-06-11 16:32:24 +02005904 htx_nbblks(htx) == 1 && type == HTX_BLK_DATA &&
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005905 fsize <= h2s_mws(h2s) && fsize <= h2c->mws && fsize <= h2c->mfs)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005906 void *old_area = mbuf->area;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005907
Willy Tarreaubcc45952019-05-26 10:05:50 +02005908 if (b_data(mbuf)) {
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005909 /* Too bad there are data left there. We're willing to memcpy/memmove
5910 * up to 1/4 of the buffer, which means that it's OK to copy a large
5911 * frame into a buffer containing few data if it needs to be realigned,
5912 * and that it's also OK to copy few data without realigning. Otherwise
5913 * we'll pretend the mbuf is full and wait for it to become empty.
Willy Tarreau98de12a2018-12-12 07:03:00 +01005914 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005915 if (fsize + 9 <= b_room(mbuf) &&
5916 (b_data(mbuf) <= b_size(mbuf) / 4 ||
Willy Tarreau7838a792019-08-12 18:42:03 +02005917 (fsize <= b_size(mbuf) / 4 && fsize + 9 <= b_contig_space(mbuf)))) {
5918 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 +01005919 goto copy;
Willy Tarreau7838a792019-08-12 18:42:03 +02005920 }
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005921
Willy Tarreau9c218e72019-05-26 10:08:28 +02005922 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5923 goto retry;
5924
Willy Tarreau98de12a2018-12-12 07:03:00 +01005925 h2c->flags |= H2_CF_MUX_MFULL;
5926 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005927 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 +01005928 goto end;
5929 }
5930
Christopher Faulet925abdf2021-04-27 22:51:07 +02005931 if (htx->flags & HTX_FL_EOM) {
5932 /* EOM+empty: we may need to add END_STREAM (except for tunneled
5933 * message)
5934 */
5935 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
5936 es_now = 1;
5937 }
Willy Tarreau98de12a2018-12-12 07:03:00 +01005938 /* map an H2 frame to the HTX block so that we can put the
5939 * frame header there.
5940 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005941 *mbuf = b_make(buf->area, buf->size, sizeof(struct htx) + blk->addr - 9, fsize + 9);
5942 outbuf.area = b_head(mbuf);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005943
5944 /* prepend an H2 DATA frame header just before the DATA block */
5945 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5946 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
Christopher Faulet925abdf2021-04-27 22:51:07 +02005947 if (es_now)
5948 outbuf.area[4] |= H2_F_DATA_END_STREAM;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005949 h2_set_frame_size(outbuf.area, fsize);
5950
5951 /* update windows */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005952 h2s->sws -= fsize;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005953 h2c->mws -= fsize;
5954
5955 /* and exchange with our old area */
5956 buf->area = old_area;
5957 buf->data = buf->head = 0;
5958 total += fsize;
Christopher Faulet925abdf2021-04-27 22:51:07 +02005959 fsize = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005960
5961 TRACE_PROTO("sent H2 DATA frame (zero-copy)", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Christopher Faulet925abdf2021-04-27 22:51:07 +02005962 goto out;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005963 }
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005964
Willy Tarreau98de12a2018-12-12 07:03:00 +01005965 copy:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005966 /* for DATA and EOM we'll have to emit a frame, even if empty */
5967
5968 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005969 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5970 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005971 break;
5972 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005973 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005974 }
5975
5976 if (outbuf.size < 9) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02005977 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5978 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005979 h2c->flags |= H2_CF_MUX_MFULL;
5980 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005981 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005982 goto end;
5983 }
5984
5985 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
5986 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5987 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5988 outbuf.data = 9;
5989
5990 /* we have in <fsize> the exact number of bytes we need to copy from
5991 * the HTX buffer. We need to check this against the connection's and
5992 * the stream's send windows, and to ensure that this fits in the max
5993 * frame size and in the buffer's available space minus 9 bytes (for
5994 * the frame header). The connection's flow control is applied last so
5995 * that we can use a separate list of streams which are immediately
5996 * unblocked on window opening. Note: we don't implement padding.
5997 */
5998
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005999 if (!fsize)
6000 goto send_empty;
6001
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02006002 if (h2s_mws(h2s) <= 0) {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006003 h2s->flags |= H2_SF_BLK_SFCTL;
Willy Tarreau2b718102021-04-21 07:32:39 +02006004 if (LIST_INLIST(&h2s->list))
Olivier Houchardbfe2a832019-05-10 14:02:21 +02006005 LIST_DEL_INIT(&h2s->list);
Willy Tarreau2b718102021-04-21 07:32:39 +02006006 LIST_APPEND(&h2c->blocked_list, &h2s->list);
Willy Tarreau7838a792019-08-12 18:42:03 +02006007 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 +01006008 goto end;
6009 }
6010
Willy Tarreauee573762018-12-04 15:25:57 +01006011 if (fsize > count)
6012 fsize = count;
6013
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02006014 if (fsize > h2s_mws(h2s))
6015 fsize = h2s_mws(h2s); // >0
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006016
6017 if (h2c->mfs && fsize > h2c->mfs)
6018 fsize = h2c->mfs; // >0
6019
6020 if (fsize + 9 > outbuf.size) {
Willy Tarreau455d5682019-05-24 19:42:18 +02006021 /* It doesn't fit at once. If it at least fits once split and
6022 * the amount of data to move is low, let's defragment the
6023 * buffer now.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006024 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02006025 if (b_space_wraps(mbuf) &&
6026 (fsize + 9 <= b_room(mbuf)) &&
6027 b_data(mbuf) <= MAX_DATA_REALIGN)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006028 goto realign_again;
6029 fsize = outbuf.size - 9;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01006030 trunc_out = 1;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006031
6032 if (fsize <= 0) {
6033 /* no need to send an empty frame here */
Willy Tarreau9c218e72019-05-26 10:08:28 +02006034 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
6035 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006036 h2c->flags |= H2_CF_MUX_MFULL;
6037 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02006038 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006039 goto end;
6040 }
6041 }
6042
6043 if (h2c->mws <= 0) {
6044 h2s->flags |= H2_SF_BLK_MFCTL;
Willy Tarreau7838a792019-08-12 18:42:03 +02006045 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 +01006046 goto end;
6047 }
6048
6049 if (fsize > h2c->mws)
6050 fsize = h2c->mws;
6051
6052 /* now let's copy this this into the output buffer */
6053 memcpy(outbuf.area + 9, htx_get_blk_ptr(htx, blk), fsize);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02006054 h2s->sws -= fsize;
Willy Tarreau0f799ca2018-12-04 15:20:11 +01006055 h2c->mws -= fsize;
Willy Tarreauee573762018-12-04 15:25:57 +01006056 count -= fsize;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006057
6058 send_empty:
6059 /* update the frame's size */
6060 h2_set_frame_size(outbuf.area, fsize);
6061
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006062 /* consume incoming HTX block */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006063 total += fsize;
6064 if (fsize == bsize) {
6065 htx_remove_blk(htx, blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006066 if ((htx->flags & HTX_FL_EOM) && htx_is_empty(htx)) {
6067 /* EOM+empty: we may need to add END_STREAM (except for tunneled
6068 * message)
6069 */
6070 if (!(h2s->flags & H2_SF_BODY_TUNNEL))
6071 es_now = 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02006072 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006073 }
6074 else {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006075 /* we've truncated this block */
6076 htx_cut_data_blk(htx, blk, fsize);
6077 }
6078
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006079 if (es_now)
6080 outbuf.area[4] |= H2_F_DATA_END_STREAM;
6081
6082 /* commit the H2 response */
6083 b_add(mbuf, fsize + 9);
6084
Christopher Faulet925abdf2021-04-27 22:51:07 +02006085 out:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006086 if (es_now) {
6087 if (h2s->st == H2_SS_OPEN)
6088 h2s->st = H2_SS_HLOC;
6089 else
6090 h2s_close(h2s);
6091
6092 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02006093 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 +01006094 }
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006095 else if (fsize) {
6096 if (fsize == bsize) {
6097 TRACE_DEVEL("more data may be available, trying to send another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6098 goto new_frame;
6099 }
6100 else if (trunc_out) {
6101 /* we've truncated this block */
6102 goto new_frame;
6103 }
6104 }
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006105
6106 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02006107 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006108 return total;
6109}
6110
Christopher Faulet991febd2020-12-02 15:17:31 +01006111/* Skip the message payload (DATA blocks) and emit an empty DATA frame with the
6112 * ES flag set for stream <h2s>. This function is called for response known to
6113 * have no payload. Only DATA blocks are skipped. This means the trailers are
Ilya Shipitsinacf84592021-02-06 22:29:08 +05006114 * still emitted. The caller must check the stream's status to detect any error
Christopher Faulet991febd2020-12-02 15:17:31 +01006115 * which might have happened subsequently to a successful send. Returns the
6116 * number of data bytes consumed, or zero if nothing done.
6117 */
6118static size_t h2s_skip_data(struct h2s *h2s, struct buffer *buf, size_t count)
6119{
6120 struct h2c *h2c = h2s->h2c;
6121 struct htx *htx;
6122 int bsize; /* htx block size */
6123 int fsize; /* h2 frame size */
6124 struct htx_blk *blk;
6125 enum htx_blk_type type;
6126 size_t total = 0;
6127
6128 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6129
Christopher Faulet991febd2020-12-02 15:17:31 +01006130 htx = htx_from_buf(buf);
6131
6132 next_data:
6133 if (!count || htx_is_empty(htx))
6134 goto end;
6135 blk = htx_get_head_blk(htx);
6136 type = htx_get_blk_type(blk);
6137 bsize = htx_get_blksz(blk);
6138 fsize = bsize;
6139 if (type != HTX_BLK_DATA)
6140 goto end;
6141
6142 if (fsize > count)
6143 fsize = count;
6144
6145 if (fsize != bsize)
6146 goto skip_data;
6147
6148 if (!(htx->flags & HTX_FL_EOM) || !htx_is_unique_blk(htx, blk))
6149 goto skip_data;
6150
6151 /* Here, it is the last block and it is also the end of the message. So
6152 * we can emit an empty DATA frame with the ES flag set
6153 */
6154 if (h2_send_empty_data_es(h2s) <= 0)
6155 goto end;
6156
6157 if (h2s->st == H2_SS_OPEN)
6158 h2s->st = H2_SS_HLOC;
6159 else
6160 h2s_close(h2s);
6161
6162 skip_data:
6163 /* consume incoming HTX block */
6164 total += fsize;
6165 if (fsize == bsize) {
6166 TRACE_DEVEL("more data may be available, trying to skip another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6167 htx_remove_blk(htx, blk);
6168 goto next_data;
6169 }
6170 else {
6171 /* we've truncated this block */
6172 htx_cut_data_blk(htx, blk, fsize);
6173 }
6174
6175 end:
6176 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
6177 return total;
6178}
6179
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006180/* Try to send a HEADERS frame matching HTX_BLK_TLR series of blocks present in
6181 * HTX message <htx> for the H2 stream <h2s>. Returns the number of bytes
6182 * processed. The caller must check the stream's status to detect any error
6183 * which might have happened subsequently to a successful send. The htx blocks
6184 * are automatically removed from the message. The htx message is assumed to be
6185 * valid since produced from the internal code. Processing stops when meeting
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006186 * the EOT, which *is* removed. All trailers are processed at once and sent as a
6187 * single frame. The ES flag is always set.
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006188 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006189static size_t h2s_make_trailers(struct h2s *h2s, struct htx *htx)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006190{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02006191 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006192 struct h2c *h2c = h2s->h2c;
6193 struct htx_blk *blk;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006194 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02006195 struct buffer *mbuf;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006196 enum htx_blk_type type;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006197 int ret = 0;
6198 int hdr;
6199 int idx;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006200
Willy Tarreau7838a792019-08-12 18:42:03 +02006201 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
6202
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006203 /* get trailers. */
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006204 hdr = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006205 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006206 type = htx_get_blk_type(blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006207
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006208 if (type == HTX_BLK_UNUSED)
6209 continue;
6210
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006211 if (type == HTX_BLK_EOT)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006212 break;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006213 if (type == HTX_BLK_TLR) {
6214 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
6215 TRACE_ERROR("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
6216 goto fail;
6217 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006218
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006219 list[hdr].n = htx_get_blk_name(htx, blk);
6220 list[hdr].v = htx_get_blk_value(htx, blk);
6221 hdr++;
6222 }
6223 else {
6224 TRACE_ERROR("will not encode unexpected htx block", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006225 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02006226 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006227 }
6228
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006229 /* marker for end of trailers */
6230 list[hdr].n = ist("");
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006231
Willy Tarreau9c218e72019-05-26 10:08:28 +02006232 mbuf = br_tail(h2c->mbuf);
6233 retry:
6234 if (!h2_get_buf(h2c, mbuf)) {
6235 h2c->flags |= H2_CF_MUX_MALLOC;
6236 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02006237 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 +02006238 goto end;
6239 }
6240
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006241 chunk_reset(&outbuf);
6242
6243 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02006244 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
6245 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006246 break;
6247 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02006248 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006249 }
6250
6251 if (outbuf.size < 9)
6252 goto full;
6253
6254 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4,ES=1 */
6255 memcpy(outbuf.area, "\x00\x00\x00\x01\x05", 5);
6256 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
6257 outbuf.data = 9;
6258
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006259 /* encode all headers */
6260 for (idx = 0; idx < hdr; idx++) {
6261 /* these ones do not exist in H2 or must not appear in
6262 * trailers and must be dropped.
6263 */
6264 if (isteq(list[idx].n, ist("host")) ||
6265 isteq(list[idx].n, ist("content-length")) ||
6266 isteq(list[idx].n, ist("connection")) ||
6267 isteq(list[idx].n, ist("proxy-connection")) ||
6268 isteq(list[idx].n, ist("keep-alive")) ||
6269 isteq(list[idx].n, ist("upgrade")) ||
6270 isteq(list[idx].n, ist("te")) ||
6271 isteq(list[idx].n, ist("transfer-encoding")))
6272 continue;
6273
Christopher Faulet86d144c2019-08-14 16:32:25 +02006274 /* Skip all pseudo-headers */
6275 if (*(list[idx].n.ptr) == ':')
6276 continue;
6277
Willy Tarreau11e8a8c2023-01-24 19:43:11 +01006278 if (!h2_encode_header(&outbuf, list[idx].n, list[idx].v, H2_EV_TX_FRAME|H2_EV_TX_HDR,
6279 ist(TRC_LOC), __FUNCTION__, h2c, h2s)) {
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006280 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02006281 if (b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006282 goto realign_again;
6283 goto full;
6284 }
6285 }
6286
Willy Tarreau5121e5d2019-05-06 15:13:41 +02006287 if (outbuf.data == 9) {
6288 /* here we have a problem, we have nothing to emit (either we
6289 * received an empty trailers block followed or we removed its
6290 * contents above). Because of this we can't send a HEADERS
6291 * frame, so we have to cheat and instead send an empty DATA
6292 * frame conveying the ES flag.
Willy Tarreau67b8cae2019-02-21 18:16:35 +01006293 */
6294 outbuf.area[3] = H2_FT_DATA;
6295 outbuf.area[4] = H2_F_DATA_END_STREAM;
6296 }
6297
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006298 /* update the frame's size */
6299 h2_set_frame_size(outbuf.area, outbuf.data - 9);
6300
Willy Tarreau572d9f52019-10-11 16:58:37 +02006301 if (outbuf.data > h2c->mfs + 9) {
6302 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
6303 /* output full */
6304 if (b_space_wraps(mbuf))
6305 goto realign_again;
6306 goto full;
6307 }
6308 }
6309
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006310 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02006311 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 +02006312 b_add(mbuf, outbuf.data);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006313 h2s->flags |= H2_SF_ES_SENT;
6314
6315 if (h2s->st == H2_SS_OPEN)
6316 h2s->st = H2_SS_HLOC;
6317 else
6318 h2s_close(h2s);
6319
6320 /* OK we could properly deliver the response */
6321 done:
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02006322 /* remove all header blocks till the end and compute the corresponding size. */
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006323 ret = 0;
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006324 blk = htx_get_head_blk(htx);
6325 while (blk) {
6326 type = htx_get_blk_type(blk);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006327 ret += htx_get_blksz(blk);
6328 blk = htx_remove_blk(htx, blk);
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006329 /* The removed block is the EOT */
6330 if (type == HTX_BLK_EOT)
6331 break;
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006332 }
6333
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006334 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02006335 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006336 return ret;
6337 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02006338 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
6339 goto retry;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006340 h2c->flags |= H2_CF_MUX_MFULL;
6341 h2s->flags |= H2_SF_BLK_MROOM;
6342 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006343 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 +01006344 goto end;
6345 fail:
6346 /* unparsable HTX messages, too large ones to be produced in the local
6347 * list etc go here (unrecoverable errors).
6348 */
6349 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
6350 ret = 0;
6351 goto end;
6352}
6353
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006354/* Called from the upper layer, to subscribe <es> to events <event_type>. The
6355 * event subscriber <es> is not allowed to change from a previous call as long
6356 * as at least one event is still subscribed. The <event_type> must only be a
6357 * combination of SUB_RETRY_RECV and SUB_RETRY_SEND. It always returns 0.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006358 */
Willy Tarreau36c22322022-05-27 10:41:24 +02006359static int h2_subscribe(struct stconn *sc, int event_type, struct wait_event *es)
Olivier Houchard6ff20392018-07-17 18:46:31 +02006360{
Willy Tarreau36c22322022-05-27 10:41:24 +02006361 struct h2s *h2s = __sc_mux_strm(sc);
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02006362 struct h2c *h2c = h2s->h2c;
Olivier Houchard6ff20392018-07-17 18:46:31 +02006363
Willy Tarreau7838a792019-08-12 18:42:03 +02006364 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006365
6366 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006367 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006368
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006369 es->events |= event_type;
6370 h2s->subs = es;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006371
6372 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006373 TRACE_DEVEL("subscribe(recv)", H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006374
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006375 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006376 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2c->conn, h2s);
Olivier Houchardf8338152019-05-14 17:50:32 +02006377 if (!(h2s->flags & H2_SF_BLK_SFCTL) &&
Willy Tarreau2b718102021-04-21 07:32:39 +02006378 !LIST_INLIST(&h2s->list)) {
Olivier Houchardf8338152019-05-14 17:50:32 +02006379 if (h2s->flags & H2_SF_BLK_MFCTL)
Willy Tarreau2b718102021-04-21 07:32:39 +02006380 LIST_APPEND(&h2c->fctl_list, &h2s->list);
Olivier Houchardf8338152019-05-14 17:50:32 +02006381 else
Willy Tarreau2b718102021-04-21 07:32:39 +02006382 LIST_APPEND(&h2c->send_list, &h2s->list);
Olivier Houcharde1c6dbc2018-08-01 17:06:43 +02006383 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02006384 }
Willy Tarreau7838a792019-08-12 18:42:03 +02006385 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006386 return 0;
Olivier Houchard6ff20392018-07-17 18:46:31 +02006387}
6388
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006389/* Called from the upper layer, to unsubscribe <es> from events <event_type>.
6390 * The <es> pointer is not allowed to differ from the one passed to the
6391 * subscribe() call. It always returns zero.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006392 */
Willy Tarreau36c22322022-05-27 10:41:24 +02006393static int h2_unsubscribe(struct stconn *sc, int event_type, struct wait_event *es)
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006394{
Willy Tarreau36c22322022-05-27 10:41:24 +02006395 struct h2s *h2s = __sc_mux_strm(sc);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006396
Willy Tarreau7838a792019-08-12 18:42:03 +02006397 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006398
6399 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006400 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01006401
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01006402 es->events &= ~event_type;
6403 if (!es->events)
Willy Tarreauf96508a2020-01-10 11:12:48 +01006404 h2s->subs = NULL;
6405
6406 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02006407 TRACE_DEVEL("unsubscribe(recv)", H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006408
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006409 if (event_type & SUB_RETRY_SEND) {
Frédéric Lécaille67fda162022-06-30 12:01:54 +02006410 TRACE_DEVEL("unsubscribe(send)", H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01006411 h2s->flags &= ~H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01006412 if (!(h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)))
6413 LIST_DEL_INIT(&h2s->list);
Olivier Houchardd846c262018-10-19 17:24:29 +02006414 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01006415
Willy Tarreau7838a792019-08-12 18:42:03 +02006416 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006417 return 0;
6418}
6419
6420
Christopher Faulet564e39c2021-09-21 15:50:55 +02006421/* Called from the upper layer, to receive data
6422 *
6423 * The caller is responsible for defragmenting <buf> if necessary. But <flags>
6424 * must be tested to know the calling context. If CO_RFL_BUF_FLUSH is set, it
6425 * means the caller wants to flush input data (from the mux buffer and the
6426 * channel buffer) to be able to use kernel splicing or any kind of mux-to-mux
6427 * xfer. If CO_RFL_KEEP_RECV is set, the mux must always subscribe for read
6428 * events before giving back. CO_RFL_BUF_WET is set if <buf> is congested with
6429 * data scheduled for leaving soon. CO_RFL_BUF_NOT_STUCK is set to instruct the
6430 * mux it may optimize the data copy to <buf> if necessary. Otherwise, it should
6431 * copy as much data as possible.
6432 */
Willy Tarreau36c22322022-05-27 10:41:24 +02006433static size_t h2_rcv_buf(struct stconn *sc, struct buffer *buf, size_t count, int flags)
Olivier Houchard511efea2018-08-16 15:30:32 +02006434{
Willy Tarreau36c22322022-05-27 10:41:24 +02006435 struct h2s *h2s = __sc_mux_strm(sc);
Willy Tarreau082f5592018-11-25 08:03:32 +01006436 struct h2c *h2c = h2s->h2c;
Willy Tarreau86724e22018-12-01 23:19:43 +01006437 struct htx *h2s_htx = NULL;
6438 struct htx *buf_htx = NULL;
Olivier Houchard511efea2018-08-16 15:30:32 +02006439 size_t ret = 0;
6440
Willy Tarreau7838a792019-08-12 18:42:03 +02006441 TRACE_ENTER(H2_EV_STRM_RECV, h2c->conn, h2s);
6442
Olivier Houchard511efea2018-08-16 15:30:32 +02006443 /* transfer possibly pending data to the upper layer */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006444 h2s_htx = htx_from_buf(&h2s->rxbuf);
Christopher Fauletec361bb2022-02-21 15:12:54 +01006445 if (htx_is_empty(h2s_htx) && !(h2s_htx->flags & HTX_FL_PARSING_ERROR)) {
Christopher Faulet9b79a102019-07-15 11:22:56 +02006446 /* Here htx_to_buf() will set buffer data to 0 because
6447 * the HTX is empty.
6448 */
6449 htx_to_buf(h2s_htx, &h2s->rxbuf);
6450 goto end;
6451 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02006452 ret = h2s_htx->data;
6453 buf_htx = htx_from_buf(buf);
Willy Tarreau7196dd62019-03-05 10:51:11 +01006454
Christopher Faulet9b79a102019-07-15 11:22:56 +02006455 /* <buf> is empty and the message is small enough, swap the
6456 * buffers. */
6457 if (htx_is_empty(buf_htx) && htx_used_space(h2s_htx) <= count) {
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01006458 htx_to_buf(buf_htx, buf);
6459 htx_to_buf(h2s_htx, &h2s->rxbuf);
Christopher Faulet9b79a102019-07-15 11:22:56 +02006460 b_xfer(buf, &h2s->rxbuf, b_data(&h2s->rxbuf));
6461 goto end;
Willy Tarreau86724e22018-12-01 23:19:43 +01006462 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02006463
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006464 htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_UNUSED);
Christopher Faulet9b79a102019-07-15 11:22:56 +02006465
6466 if (h2s_htx->flags & HTX_FL_PARSING_ERROR) {
6467 buf_htx->flags |= HTX_FL_PARSING_ERROR;
6468 if (htx_is_empty(buf_htx))
Willy Tarreau95acc8b2022-05-27 16:14:10 +02006469 se_fl_set(h2s->sd, SE_FL_EOI);
Willy Tarreau86724e22018-12-01 23:19:43 +01006470 }
Christopher Faulet72722c02023-02-23 14:26:34 +01006471 else if (htx_is_empty(h2s_htx)) {
Christopher Faulet42432f32020-11-20 17:43:16 +01006472 buf_htx->flags |= (h2s_htx->flags & HTX_FL_EOM);
Christopher Faulet72722c02023-02-23 14:26:34 +01006473 }
6474
Christopher Faulet9b79a102019-07-15 11:22:56 +02006475 buf_htx->extra = (h2s_htx->extra ? (h2s_htx->data + h2s_htx->extra) : 0);
6476 htx_to_buf(buf_htx, buf);
6477 htx_to_buf(h2s_htx, &h2s->rxbuf);
6478 ret -= h2s_htx->data;
6479
Christopher Faulet37070b22019-02-14 15:12:14 +01006480 end:
Olivier Houchard638b7992018-08-16 15:41:52 +02006481 if (b_data(&h2s->rxbuf))
Willy Tarreau95acc8b2022-05-27 16:14:10 +02006482 se_fl_set(h2s->sd, SE_FL_RCV_MORE | SE_FL_WANT_ROOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02006483 else {
Christopher Faulet34f81d52023-05-04 16:41:37 +02006484 if (!(h2c->flags & H2_CF_IS_BACK) && (h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_ES_RCVD))) {
Christopher Faulet4403cdf2023-05-04 15:49:12 +02006485 /* If request ES is reported to the upper layer, it means the
6486 * H2S now expects data from the opposite side.
6487 */
6488 se_expect_data(h2s->sd);
6489 }
6490
Willy Tarreau95acc8b2022-05-27 16:14:10 +02006491 se_fl_clr(h2s->sd, SE_FL_RCV_MORE | SE_FL_WANT_ROOM);
Christopher Faulet531dd052023-05-24 11:14:38 +02006492 h2s_propagate_term_flags(h2c, h2s);
Olivier Houchard638b7992018-08-16 15:41:52 +02006493 if (b_size(&h2s->rxbuf)) {
6494 b_free(&h2s->rxbuf);
Willy Tarreau4d77bbf2021-02-20 12:02:46 +01006495 offer_buffers(NULL, 1);
Olivier Houchard638b7992018-08-16 15:41:52 +02006496 }
Olivier Houchard511efea2018-08-16 15:30:32 +02006497 }
6498
Willy Tarreau082f5592018-11-25 08:03:32 +01006499 if (ret && h2c->dsi == h2s->id) {
6500 /* demux is blocking on this stream's buffer */
6501 h2c->flags &= ~H2_CF_DEM_SFULL;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02006502 h2c_restart_reading(h2c, 1);
Willy Tarreau082f5592018-11-25 08:03:32 +01006503 }
Christopher Faulet37070b22019-02-14 15:12:14 +01006504
Willy Tarreau7838a792019-08-12 18:42:03 +02006505 TRACE_LEAVE(H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard511efea2018-08-16 15:30:32 +02006506 return ret;
6507}
6508
Olivier Houchardd846c262018-10-19 17:24:29 +02006509
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006510/* Called from the upper layer, to send data from buffer <buf> for no more than
6511 * <count> bytes. Returns the number of bytes effectively sent. Some status
Willy Tarreau4596fe22022-05-17 19:07:51 +02006512 * flags may be updated on the stream connector.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01006513 */
Willy Tarreau36c22322022-05-27 10:41:24 +02006514static size_t h2_snd_buf(struct stconn *sc, struct buffer *buf, size_t count, int flags)
Willy Tarreau62f52692017-10-08 23:01:42 +02006515{
Willy Tarreau36c22322022-05-27 10:41:24 +02006516 struct h2s *h2s = __sc_mux_strm(sc);
Willy Tarreau1dc41e72018-06-14 13:21:28 +02006517 size_t total = 0;
Willy Tarreau5dd17352018-06-14 13:33:30 +02006518 size_t ret;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006519 struct htx *htx;
6520 struct htx_blk *blk;
6521 enum htx_blk_type btype;
6522 uint32_t bsize;
6523 int32_t idx;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006524
Willy Tarreau7838a792019-08-12 18:42:03 +02006525 TRACE_ENTER(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
6526
Olivier Houchardd360ac62019-03-22 17:37:16 +01006527 /* If we were not just woken because we wanted to send but couldn't,
6528 * and there's somebody else that is waiting to send, do nothing,
6529 * we will subscribe later and be put at the end of the list
6530 */
Willy Tarreaud9464162020-01-10 18:25:07 +01006531 if (!(h2s->flags & H2_SF_NOTIFIED) &&
Willy Tarreau7838a792019-08-12 18:42:03 +02006532 (!LIST_ISEMPTY(&h2s->h2c->send_list) || !LIST_ISEMPTY(&h2s->h2c->fctl_list))) {
6533 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 +01006534 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006535 }
Willy Tarreaud9464162020-01-10 18:25:07 +01006536 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02006537
Willy Tarreau7838a792019-08-12 18:42:03 +02006538 if (h2s->h2c->st0 < H2_CS_FRAME_H) {
6539 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 +02006540 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02006541 }
Willy Tarreau6bf641a2018-10-08 09:43:03 +02006542
Willy Tarreaucab22952019-10-31 15:48:18 +01006543 if (h2s->h2c->st0 >= H2_CS_ERROR) {
Willy Tarreau95acc8b2022-05-27 16:14:10 +02006544 se_fl_set(h2s->sd, SE_FL_ERROR);
Willy Tarreaucab22952019-10-31 15:48:18 +01006545 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);
6546 return 0;
6547 }
6548
Christopher Faulet9b79a102019-07-15 11:22:56 +02006549 htx = htx_from_buf(buf);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006550
Willy Tarreau0bad0432018-06-14 16:54:01 +02006551 if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count)
Willy Tarreauc4312d32017-11-07 12:01:53 +01006552 h2s->flags |= H2_SF_OUTGOING_DATA;
6553
Christopher Faulet2e47e3a2023-01-13 11:40:24 +01006554 if (htx->extra && htx->extra != HTX_UNKOWN_PAYLOAD_LENGTH)
Willy Tarreau48770452022-08-18 16:03:51 +02006555 h2s->flags |= H2_SF_MORE_HTX_DATA;
6556 else
6557 h2s->flags &= ~H2_SF_MORE_HTX_DATA;
6558
Willy Tarreau751f2d02018-10-05 09:35:00 +02006559 if (h2s->id == 0) {
6560 int32_t id = h2c_get_next_sid(h2s->h2c);
6561
6562 if (id < 0) {
Willy Tarreau95acc8b2022-05-27 16:14:10 +02006563 se_fl_set(h2s->sd, SE_FL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02006564 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 +02006565 return 0;
6566 }
6567
6568 eb32_delete(&h2s->by_id);
6569 h2s->by_id.key = h2s->id = id;
6570 h2s->h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01006571 h2s->h2c->nb_reserved--;
Willy Tarreau751f2d02018-10-05 09:35:00 +02006572 eb32_insert(&h2s->h2c->streams_by_id, &h2s->by_id);
6573 }
6574
Christopher Faulet9b79a102019-07-15 11:22:56 +02006575 while (h2s->st < H2_SS_HLOC && !(h2s->flags & H2_SF_BLK_ANY) &&
6576 count && !htx_is_empty(htx)) {
6577 idx = htx_get_head(htx);
6578 blk = htx_get_blk(htx, idx);
6579 btype = htx_get_blk_type(blk);
6580 bsize = htx_get_blksz(blk);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006581
Christopher Faulet9b79a102019-07-15 11:22:56 +02006582 switch (btype) {
Willy Tarreau80739692018-10-05 11:35:57 +02006583 case HTX_BLK_REQ_SL:
6584 /* start-line before headers */
Willy Tarreau7cfbb812023-01-26 16:02:01 +01006585 ret = h2s_snd_bhdrs(h2s, htx);
Willy Tarreau80739692018-10-05 11:35:57 +02006586 if (ret > 0) {
6587 total += ret;
6588 count -= ret;
6589 if (ret < bsize)
6590 goto done;
6591 }
6592 break;
6593
Willy Tarreau115e83b2018-12-01 19:17:53 +01006594 case HTX_BLK_RES_SL:
6595 /* start-line before headers */
Willy Tarreau7cfbb812023-01-26 16:02:01 +01006596 ret = h2s_snd_fhdrs(h2s, htx);
Willy Tarreau115e83b2018-12-01 19:17:53 +01006597 if (ret > 0) {
6598 total += ret;
6599 count -= ret;
6600 if (ret < bsize)
6601 goto done;
6602 }
6603 break;
6604
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006605 case HTX_BLK_DATA:
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006606 /* all these cause the emission of a DATA frame (possibly empty) */
Christopher Faulet991febd2020-12-02 15:17:31 +01006607 if (!(h2s->h2c->flags & H2_CF_IS_BACK) &&
6608 (h2s->flags & (H2_SF_BODY_TUNNEL|H2_SF_BODYLESS_RESP)) == H2_SF_BODYLESS_RESP)
6609 ret = h2s_skip_data(h2s, buf, count);
6610 else
6611 ret = h2s_make_data(h2s, buf, count);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006612 if (ret > 0) {
Willy Tarreau98de12a2018-12-12 07:03:00 +01006613 htx = htx_from_buf(buf);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01006614 total += ret;
6615 count -= ret;
6616 if (ret < bsize)
6617 goto done;
6618 }
6619 break;
6620
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006621 case HTX_BLK_TLR:
Christopher Faulet2d7c5392019-06-03 10:41:26 +02006622 case HTX_BLK_EOT:
Christopher Fauletd1ac2b92020-12-02 19:12:22 +01006623 /* This is the first trailers block, all the subsequent ones */
Christopher Faulet9b79a102019-07-15 11:22:56 +02006624 ret = h2s_make_trailers(h2s, htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01006625 if (ret > 0) {
6626 total += ret;
6627 count -= ret;
6628 if (ret < bsize)
6629 goto done;
6630 }
6631 break;
6632
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006633 default:
6634 htx_remove_blk(htx, blk);
6635 total += bsize;
6636 count -= bsize;
6637 break;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006638 }
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01006639 }
6640
Christopher Faulet9b79a102019-07-15 11:22:56 +02006641 done:
Willy Tarreau2b778482019-05-06 15:00:22 +02006642 if (h2s->st >= H2_SS_HLOC) {
Willy Tarreau00610962018-07-19 10:58:28 +02006643 /* trim any possibly pending data after we close (extra CR-LF,
6644 * unprocessed trailers, abnormal extra data, ...)
6645 */
Willy Tarreau0bad0432018-06-14 16:54:01 +02006646 total += count;
6647 count = 0;
Willy Tarreau00610962018-07-19 10:58:28 +02006648 }
6649
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006650 /* RST are sent similarly to frame acks */
Willy Tarreau02492192017-12-07 15:59:29 +01006651 if (h2s->st == H2_SS_ERROR || h2s->flags & H2_SF_RST_RCVD) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006652 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 Tarreau95acc8b2022-05-27 16:14:10 +02006653 se_fl_set_error(h2s->sd);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01006654 if (h2s_send_rst_stream(h2s->h2c, h2s) > 0)
Willy Tarreau00dd0782018-03-01 16:31:34 +01006655 h2s_close(h2s);
Willy Tarreauc6795ca2017-11-07 09:43:06 +01006656 }
6657
Christopher Faulet9b79a102019-07-15 11:22:56 +02006658 htx_to_buf(htx, buf);
Olivier Houchardd846c262018-10-19 17:24:29 +02006659
Olivier Houchard7505f942018-08-21 18:10:44 +02006660 if (total > 0) {
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006661 if (!(h2s->h2c->wait_event.events & SUB_RETRY_SEND)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006662 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 +02006663 tasklet_wakeup(h2s->h2c->wait_event.tasklet);
Tim Duesterhus12a08d82020-12-21 19:40:16 +01006664 }
Olivier Houchardd846c262018-10-19 17:24:29 +02006665
Olivier Houchard7505f942018-08-21 18:10:44 +02006666 }
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01006667 /* If we're waiting for flow control, and we got a shutr on the
6668 * connection, we will never be unlocked, so add an error on
Willy Tarreau4596fe22022-05-17 19:07:51 +02006669 * the stream connector.
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01006670 */
Christopher Fauletff7925d2022-10-11 19:12:40 +02006671 if ((h2s->h2c->flags & H2_CF_RCVD_SHUT) &&
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01006672 !b_data(&h2s->h2c->dbuf) &&
6673 (h2s->flags & (H2_SF_BLK_SFCTL | H2_SF_BLK_MFCTL))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02006674 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);
Willy Tarreau35c4dd02023-01-17 16:25:29 +01006675 se_fl_set_error(h2s->sd);
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01006676 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006677
Willy Tarreau5723f292020-01-10 15:16:57 +01006678 if (total > 0 && !(h2s->flags & H2_SF_BLK_SFCTL) &&
6679 !(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006680 /* Ok we managed to send something, leave the send_list if we were still there */
Olivier Houchardd360ac62019-03-22 17:37:16 +01006681 LIST_DEL_INIT(&h2s->list);
6682 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02006683
Willy Tarreau7838a792019-08-12 18:42:03 +02006684 TRACE_LEAVE(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02006685 return total;
Willy Tarreau62f52692017-10-08 23:01:42 +02006686}
6687
Willy Tarreau90bffa22022-09-01 19:06:44 +02006688/* appends some info about stream <h2s> to buffer <msg>, or does nothing if
Willy Tarreau7051f732022-09-02 15:22:12 +02006689 * <h2s> is NULL. Returns non-zero if the stream is considered suspicious. May
6690 * emit multiple lines, each new one being prefixed with <pfx>, if <pfx> is not
6691 * NULL, otherwise a single line is used.
Willy Tarreau90bffa22022-09-01 19:06:44 +02006692 */
Willy Tarreau7051f732022-09-02 15:22:12 +02006693static int h2_dump_h2s_info(struct buffer *msg, const struct h2s *h2s, const char *pfx)
Willy Tarreau90bffa22022-09-01 19:06:44 +02006694{
6695 int ret = 0;
6696
6697 if (!h2s)
6698 return ret;
6699
Willy Tarreau7051f732022-09-02 15:22:12 +02006700 chunk_appendf(msg, " h2s.id=%d .st=%s .flg=0x%04x .rxbuf=%u@%p+%u/%u",
Willy Tarreau90bffa22022-09-01 19:06:44 +02006701 h2s->id, h2s_st_to_str(h2s->st), h2s->flags,
6702 (unsigned int)b_data(&h2s->rxbuf), b_orig(&h2s->rxbuf),
Willy Tarreau7051f732022-09-02 15:22:12 +02006703 (unsigned int)b_head_ofs(&h2s->rxbuf), (unsigned int)b_size(&h2s->rxbuf));
6704
6705 if (pfx)
6706 chunk_appendf(msg, "\n%s", pfx);
6707
6708 chunk_appendf(msg, " .sc=%p", h2s_sc(h2s));
Willy Tarreau90bffa22022-09-01 19:06:44 +02006709 if (h2s_sc(h2s))
6710 chunk_appendf(msg, "(.flg=0x%08x .app=%p)",
6711 h2s_sc(h2s)->flags, h2s_sc(h2s)->app);
6712
Willy Tarreau7051f732022-09-02 15:22:12 +02006713 chunk_appendf(msg, " .sd=%p", h2s->sd);
Willy Tarreau90bffa22022-09-01 19:06:44 +02006714 chunk_appendf(msg, "(.flg=0x%08x)", se_fl_get(h2s->sd));
6715
Willy Tarreau7051f732022-09-02 15:22:12 +02006716 if (pfx)
6717 chunk_appendf(msg, "\n%s", pfx);
6718
Willy Tarreau90bffa22022-09-01 19:06:44 +02006719 chunk_appendf(msg, " .subs=%p", h2s->subs);
6720 if (h2s->subs) {
6721 chunk_appendf(msg, "(ev=%d tl=%p", h2s->subs->events, h2s->subs->tasklet);
6722 chunk_appendf(msg, " tl.calls=%d tl.ctx=%p tl.fct=",
6723 h2s->subs->tasklet->calls,
6724 h2s->subs->tasklet->context);
6725 if (h2s->subs->tasklet->calls >= 1000000)
6726 ret = 1;
6727 resolve_sym_name(msg, NULL, h2s->subs->tasklet->process);
6728 chunk_appendf(msg, ")");
6729 }
6730 return ret;
6731}
6732
Willy Tarreau4e97bcc2022-09-01 19:25:57 +02006733/* appends some info about connection <h2c> to buffer <msg>, or does nothing if
6734 * <h2c> is NULL. Returns non-zero if the connection is considered suspicious.
Willy Tarreau7051f732022-09-02 15:22:12 +02006735 * May emit multiple lines, each new one being prefixed with <pfx>, if <pfx> is
6736 * not NULL, otherwise a single line is used.
Willy Tarreau4e97bcc2022-09-01 19:25:57 +02006737 */
Willy Tarreau7051f732022-09-02 15:22:12 +02006738static int h2_dump_h2c_info(struct buffer *msg, struct h2c *h2c, const char *pfx)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006739{
Willy Tarreau4e97bcc2022-09-01 19:25:57 +02006740 const struct buffer *hmbuf, *tmbuf;
6741 const struct h2s *h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006742 struct eb32_node *node;
6743 int fctl_cnt = 0;
6744 int send_cnt = 0;
6745 int tree_cnt = 0;
6746 int orph_cnt = 0;
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006747 int ret = 0;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006748
6749 if (!h2c)
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006750 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006751
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006752 list_for_each_entry(h2s, &h2c->fctl_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006753 fctl_cnt++;
6754
Olivier Houchardfa8aa862018-10-10 18:25:41 +02006755 list_for_each_entry(h2s, &h2c->send_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006756 send_cnt++;
6757
6758 node = eb32_first(&h2c->streams_by_id);
6759 while (node) {
6760 h2s = container_of(node, struct h2s, by_id);
6761 tree_cnt++;
Willy Tarreau7be4ee02022-05-18 07:31:41 +02006762 if (!h2s_sc(h2s))
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006763 orph_cnt++;
6764 node = eb32_next(node);
6765 }
6766
Willy Tarreau60f62682019-05-26 11:32:27 +02006767 hmbuf = br_head(h2c->mbuf);
Willy Tarreaubcc45952019-05-26 10:05:50 +02006768 tmbuf = br_tail(h2c->mbuf);
Willy Tarreauab2ec452019-08-30 07:07:08 +02006769 chunk_appendf(msg, " h2c.st0=%s .err=%d .maxid=%d .lastid=%d .flg=0x%04x"
Willy Tarreau7051f732022-09-02 15:22:12 +02006770 " .nbst=%u .nbsc=%u",
Willy Tarreauab2ec452019-08-30 07:07:08 +02006771 h2c_st_to_str(h2c->st0), h2c->errcode, h2c->max_id, h2c->last_sid, h2c->flags,
Willy Tarreau7051f732022-09-02 15:22:12 +02006772 h2c->nb_streams, h2c->nb_sc);
6773
6774 if (pfx)
6775 chunk_appendf(msg, "\n%s", pfx);
6776
6777 chunk_appendf(msg, " .fctl_cnt=%d .send_cnt=%d .tree_cnt=%d"
6778 " .orph_cnt=%d .sub=%d .dsi=%d .dbuf=%u@%p+%u/%u",
6779 fctl_cnt, send_cnt, tree_cnt, orph_cnt,
Willy Tarreau4f6516d2018-12-19 13:59:17 +01006780 h2c->wait_event.events, h2c->dsi,
Willy Tarreau987c0632018-12-18 10:32:05 +01006781 (unsigned int)b_data(&h2c->dbuf), b_orig(&h2c->dbuf),
Willy Tarreau7051f732022-09-02 15:22:12 +02006782 (unsigned int)b_head_ofs(&h2c->dbuf), (unsigned int)b_size(&h2c->dbuf));
6783
6784 if (pfx)
6785 chunk_appendf(msg, "\n%s", pfx);
6786
Christopher Faulet68ee7842022-10-12 10:21:33 +02006787 chunk_appendf(msg, " .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]",
Willy Tarreau60f62682019-05-26 11:32:27 +02006788 br_head_idx(h2c->mbuf), br_tail_idx(h2c->mbuf), br_size(h2c->mbuf),
6789 (unsigned int)b_data(hmbuf), b_orig(hmbuf),
6790 (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf),
Willy Tarreaubcc45952019-05-26 10:05:50 +02006791 (unsigned int)b_data(tmbuf), b_orig(tmbuf),
6792 (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf));
Willy Tarreau987c0632018-12-18 10:32:05 +01006793
Willy Tarreauf8c77092022-11-29 15:26:43 +01006794 chunk_appendf(msg, " .task=%p", h2c->task);
6795 if (h2c->task) {
6796 chunk_appendf(msg, " .exp=%s",
6797 h2c->task->expire ? tick_is_expired(h2c->task->expire, now_ms) ? "<PAST>" :
6798 human_time(TICKS_TO_MS(h2c->task->expire - now_ms), TICKS_TO_MS(1000)) : "<NEVER>");
6799 }
Willy Tarreau7051f732022-09-02 15:22:12 +02006800
Willy Tarreau4e97bcc2022-09-01 19:25:57 +02006801 return ret;
6802}
6803
6804/* for debugging with CLI's "show fd" command */
6805static int h2_show_fd(struct buffer *msg, struct connection *conn)
6806{
6807 struct h2c *h2c = conn->ctx;
6808 const struct h2s *h2s;
6809 struct eb32_node *node;
6810 int ret = 0;
6811
6812 if (!h2c)
6813 return ret;
6814
Willy Tarreau7051f732022-09-02 15:22:12 +02006815 ret |= h2_dump_h2c_info(msg, h2c, NULL);
Willy Tarreau4e97bcc2022-09-01 19:25:57 +02006816
6817 node = eb32_last(&h2c->streams_by_id);
6818 if (node) {
6819 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau90bffa22022-09-01 19:06:44 +02006820 chunk_appendf(msg, " last_h2s=%p", h2s);
Willy Tarreau7051f732022-09-02 15:22:12 +02006821 ret |= h2_dump_h2s_info(msg, h2s, NULL);
Willy Tarreau987c0632018-12-18 10:32:05 +01006822 }
Willy Tarreau4e97bcc2022-09-01 19:25:57 +02006823
Willy Tarreau06bf83e2021-01-21 09:13:35 +01006824 return ret;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006825}
Willy Tarreau62f52692017-10-08 23:01:42 +02006826
Willy Tarreaubf4ec6f2022-09-02 15:11:40 +02006827/* for debugging with CLI's "show sess" command. May emit multiple lines, each
6828 * new one being prefixed with <pfx>, if <pfx> is not NULL, otherwise a single
6829 * line is used. Each field starts with a space so it's safe to print it after
6830 * existing fields.
6831 */
6832static int h2_show_sd(struct buffer *msg, struct sedesc *sd, const char *pfx)
6833{
6834 struct h2s *h2s = sd->se;
6835 int ret = 0;
6836
6837 if (!h2s)
6838 return ret;
6839
6840 chunk_appendf(msg, " h2s=%p", h2s);
Willy Tarreau7051f732022-09-02 15:22:12 +02006841 ret |= h2_dump_h2s_info(msg, h2s, pfx);
Willy Tarreaubf4ec6f2022-09-02 15:11:40 +02006842 if (pfx)
6843 chunk_appendf(msg, "\n%s", pfx);
6844 chunk_appendf(msg, " h2c=%p", h2s->h2c);
Willy Tarreau7051f732022-09-02 15:22:12 +02006845 ret |= h2_dump_h2c_info(msg, h2s->h2c, pfx);
Willy Tarreaubf4ec6f2022-09-02 15:11:40 +02006846 return ret;
6847}
6848
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006849/* Migrate the the connection to the current thread.
6850 * Return 0 if successful, non-zero otherwise.
6851 * Expected to be called with the old thread lock held.
6852 */
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006853static int h2_takeover(struct connection *conn, int orig_tid)
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006854{
6855 struct h2c *h2c = conn->ctx;
Willy Tarreau617e80f2020-07-01 16:39:33 +02006856 struct task *task;
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006857
6858 if (fd_takeover(conn->handle.fd, conn) != 0)
6859 return -1;
Olivier Houcharda74bb7e2020-07-03 14:01:21 +02006860
6861 if (conn->xprt->takeover && conn->xprt->takeover(conn, conn->xprt_ctx, orig_tid) != 0) {
6862 /* We failed to takeover the xprt, even if the connection may
6863 * still be valid, flag it as error'd, as we have already
6864 * taken over the fd, and wake the tasklet, so that it will
6865 * destroy it.
6866 */
6867 conn->flags |= CO_FL_ERROR;
6868 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
6869 return -1;
6870 }
6871
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006872 if (h2c->wait_event.events)
6873 h2c->conn->xprt->unsubscribe(h2c->conn, h2c->conn->xprt_ctx,
6874 h2c->wait_event.events, &h2c->wait_event);
6875 /* To let the tasklet know it should free itself, and do nothing else,
6876 * set its context to NULL.
6877 */
6878 h2c->wait_event.tasklet->context = NULL;
Olivier Houchard1662cdb2020-07-03 14:04:37 +02006879 tasklet_wakeup_on(h2c->wait_event.tasklet, orig_tid);
Willy Tarreau617e80f2020-07-01 16:39:33 +02006880
6881 task = h2c->task;
6882 if (task) {
6883 task->context = NULL;
6884 h2c->task = NULL;
6885 __ha_barrier_store();
6886 task_kill(task);
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006887
Willy Tarreaubeeabf52021-10-01 18:23:30 +02006888 h2c->task = task_new_here();
Olivier Houchardcd4159f2020-03-10 18:39:42 +01006889 if (!h2c->task) {
6890 h2_release(h2c);
6891 return -1;
6892 }
6893 h2c->task->process = h2_timeout_task;
6894 h2c->task->context = h2c;
6895 }
6896 h2c->wait_event.tasklet = tasklet_new();
6897 if (!h2c->wait_event.tasklet) {
6898 h2_release(h2c);
6899 return -1;
6900 }
6901 h2c->wait_event.tasklet->process = h2_io_cb;
6902 h2c->wait_event.tasklet->context = h2c;
6903 h2c->conn->xprt->subscribe(h2c->conn, h2c->conn->xprt_ctx,
6904 SUB_RETRY_RECV, &h2c->wait_event);
6905
6906 return 0;
6907}
6908
Willy Tarreau62f52692017-10-08 23:01:42 +02006909/*******************************************************/
6910/* functions below are dedicated to the config parsers */
6911/*******************************************************/
6912
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006913/* config parser for global "tune.h2.header-table-size" */
6914static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006915 const struct proxy *defpx, const char *file, int line,
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006916 char **err)
6917{
6918 if (too_many_args(1, args, err, NULL))
6919 return -1;
6920
6921 h2_settings_header_table_size = atoi(args[1]);
6922 if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) {
6923 memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]);
6924 return -1;
6925 }
6926 return 0;
6927}
Willy Tarreau62f52692017-10-08 23:01:42 +02006928
Willy Tarreau9d7abda2023-04-17 15:04:34 +02006929/* config parser for global "tune.h2.{be.,fe.,}initial-window-size" */
Willy Tarreaue6baec02017-07-27 11:45:11 +02006930static int h2_parse_initial_window_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006931 const struct proxy *defpx, const char *file, int line,
Willy Tarreaue6baec02017-07-27 11:45:11 +02006932 char **err)
6933{
Willy Tarreau9d7abda2023-04-17 15:04:34 +02006934 int *vptr;
6935
Willy Tarreaue6baec02017-07-27 11:45:11 +02006936 if (too_many_args(1, args, err, NULL))
6937 return -1;
6938
Willy Tarreau9d7abda2023-04-17 15:04:34 +02006939 /* backend/frontend/default */
6940 vptr = (args[0][8] == 'b') ? &h2_be_settings_initial_window_size :
6941 (args[0][8] == 'f') ? &h2_fe_settings_initial_window_size :
6942 &h2_settings_initial_window_size;
6943
6944 *vptr = atoi(args[1]);
6945 if (*vptr < 0) {
Willy Tarreaue6baec02017-07-27 11:45:11 +02006946 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6947 return -1;
6948 }
6949 return 0;
6950}
6951
Willy Tarreauca1027c2023-04-18 15:57:03 +02006952/* config parser for global "tune.h2.{be.,fe.,}max-concurrent-streams" */
Willy Tarreau5242ef82017-07-27 11:47:28 +02006953static int h2_parse_max_concurrent_streams(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006954 const struct proxy *defpx, const char *file, int line,
Willy Tarreau5242ef82017-07-27 11:47:28 +02006955 char **err)
6956{
Willy Tarreauca1027c2023-04-18 15:57:03 +02006957 uint *vptr;
6958
Willy Tarreau5242ef82017-07-27 11:47:28 +02006959 if (too_many_args(1, args, err, NULL))
6960 return -1;
6961
Willy Tarreauca1027c2023-04-18 15:57:03 +02006962 /* backend/frontend/default */
6963 vptr = (args[0][8] == 'b') ? &h2_be_settings_max_concurrent_streams :
6964 (args[0][8] == 'f') ? &h2_fe_settings_max_concurrent_streams :
6965 &h2_settings_max_concurrent_streams;
6966
6967 *vptr = atoi(args[1]);
6968 if ((int)*vptr < 0) {
Willy Tarreau5242ef82017-07-27 11:47:28 +02006969 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6970 return -1;
6971 }
6972 return 0;
6973}
6974
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006975/* config parser for global "tune.h2.max-frame-size" */
6976static int h2_parse_max_frame_size(char **args, int section_type, struct proxy *curpx,
Willy Tarreau01825162021-03-09 09:53:46 +01006977 const struct proxy *defpx, const char *file, int line,
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006978 char **err)
6979{
6980 if (too_many_args(1, args, err, NULL))
6981 return -1;
6982
6983 h2_settings_max_frame_size = atoi(args[1]);
6984 if (h2_settings_max_frame_size < 16384 || h2_settings_max_frame_size > 16777215) {
6985 memprintf(err, "'%s' expects a numeric value between 16384 and 16777215.", args[0]);
6986 return -1;
6987 }
6988 return 0;
6989}
6990
Willy Tarreau62f52692017-10-08 23:01:42 +02006991
6992/****************************************/
Ilya Shipitsin46a030c2020-07-05 16:36:08 +05006993/* MUX initialization and instantiation */
Willy Tarreau62f52692017-10-08 23:01:42 +02006994/***************************************/
6995
6996/* The mux operations */
Willy Tarreau680b2bd2018-11-27 07:30:17 +01006997static const struct mux_ops h2_ops = {
Willy Tarreau62f52692017-10-08 23:01:42 +02006998 .init = h2_init,
Olivier Houchard21df6cc2018-09-14 23:21:44 +02006999 .wake = h2_wake,
Willy Tarreau62f52692017-10-08 23:01:42 +02007000 .snd_buf = h2_snd_buf,
Olivier Houchard511efea2018-08-16 15:30:32 +02007001 .rcv_buf = h2_rcv_buf,
Olivier Houchard6ff20392018-07-17 18:46:31 +02007002 .subscribe = h2_subscribe,
Olivier Houchard83a0cd82018-09-28 17:57:58 +02007003 .unsubscribe = h2_unsubscribe,
Willy Tarreau62f52692017-10-08 23:01:42 +02007004 .attach = h2_attach,
Willy Tarreaud1373532022-05-27 11:00:59 +02007005 .get_first_sc = h2_get_first_sc,
Willy Tarreau62f52692017-10-08 23:01:42 +02007006 .detach = h2_detach,
Olivier Houchard060ed432018-11-06 16:32:42 +01007007 .destroy = h2_destroy,
Olivier Houchardd540b362018-11-05 18:37:53 +01007008 .avail_streams = h2_avail_streams,
Willy Tarreau00f18a32019-01-26 12:19:01 +01007009 .used_streams = h2_used_streams,
Willy Tarreau62f52692017-10-08 23:01:42 +02007010 .shutr = h2_shutr,
7011 .shutw = h2_shutw,
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02007012 .ctl = h2_ctl,
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02007013 .show_fd = h2_show_fd,
Willy Tarreaubf4ec6f2022-09-02 15:11:40 +02007014 .show_sd = h2_show_sd,
Olivier Houchardcd4159f2020-03-10 18:39:42 +01007015 .takeover = h2_takeover,
Christopher Fauleta97cced2022-04-12 18:04:10 +02007016 .flags = MX_FL_HTX|MX_FL_HOL_RISK|MX_FL_NO_UPG,
Willy Tarreau62f52692017-10-08 23:01:42 +02007017 .name = "H2",
7018};
7019
Christopher Faulet32f61c02018-04-10 14:33:41 +02007020static struct mux_proto_list mux_proto_h2 =
Christopher Fauletc985f6c2019-07-15 11:42:52 +02007021 { .token = IST("h2"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BOTH, .mux = &h2_ops };
Willy Tarreau62f52692017-10-08 23:01:42 +02007022
Willy Tarreau0108d902018-11-25 19:14:37 +01007023INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2);
7024
Willy Tarreau62f52692017-10-08 23:01:42 +02007025/* config keyword parsers */
7026static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreau9d7abda2023-04-17 15:04:34 +02007027 { CFG_GLOBAL, "tune.h2.be.initial-window-size", h2_parse_initial_window_size },
Willy Tarreauca1027c2023-04-18 15:57:03 +02007028 { CFG_GLOBAL, "tune.h2.be.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreau9d7abda2023-04-17 15:04:34 +02007029 { CFG_GLOBAL, "tune.h2.fe.initial-window-size", h2_parse_initial_window_size },
Willy Tarreauca1027c2023-04-18 15:57:03 +02007030 { CFG_GLOBAL, "tune.h2.fe.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02007031 { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size },
Willy Tarreaue6baec02017-07-27 11:45:11 +02007032 { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size },
Willy Tarreau5242ef82017-07-27 11:47:28 +02007033 { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreaua24b35c2019-02-21 13:24:36 +01007034 { CFG_GLOBAL, "tune.h2.max-frame-size", h2_parse_max_frame_size },
Willy Tarreau62f52692017-10-08 23:01:42 +02007035 { 0, NULL, NULL }
7036}};
7037
Willy Tarreau0108d902018-11-25 19:14:37 +01007038INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
Willy Tarreau2bdcc702020-05-19 11:31:11 +02007039
7040/* initialize internal structs after the config is parsed.
7041 * Returns zero on success, non-zero on error.
7042 */
7043static int init_h2()
7044{
7045 pool_head_hpack_tbl = create_pool("hpack_tbl",
7046 h2_settings_header_table_size,
7047 MEM_F_SHARED|MEM_F_EXACT);
Christopher Faulet52140992020-11-06 15:23:39 +01007048 if (!pool_head_hpack_tbl) {
7049 ha_alert("failed to allocate hpack_tbl memory pool\n");
7050 return (ERR_ALERT | ERR_FATAL);
7051 }
7052 return ERR_NONE;
Willy Tarreau2bdcc702020-05-19 11:31:11 +02007053}
7054
7055REGISTER_POST_CHECK(init_h2);