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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
13#include <common/cfgparse.h>
14#include <common/config.h>
Willy Tarreauafba57a2018-12-11 13:44:24 +010015#include <common/h1.h>
Willy Tarreau5ab6b572017-09-22 08:05:00 +020016#include <common/h2.h>
Willy Tarreau13278b42017-10-13 19:23:14 +020017#include <common/hpack-dec.h>
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +020018#include <common/hpack-enc.h>
Willy Tarreau5ab6b572017-09-22 08:05:00 +020019#include <common/hpack-tbl.h>
Willy Tarreaub96b77e2018-12-11 10:22:41 +010020#include <common/htx.h>
Willy Tarreau0108d902018-11-25 19:14:37 +010021#include <common/initcall.h>
Willy Tarreaue4820742017-07-27 13:37:23 +020022#include <common/net_helper.h>
Willy Tarreau62f52692017-10-08 23:01:42 +020023#include <proto/connection.h>
Willy Tarreaubcd3bb32018-12-01 18:59:00 +010024#include <proto/http_htx.h>
Willy Tarreau12ae2122019-08-08 18:23:12 +020025#include <proto/trace.h>
Olivier Houchard44d59142018-12-13 18:46:22 +010026#include <proto/session.h>
Willy Tarreau62f52692017-10-08 23:01:42 +020027#include <proto/stream.h>
Olivier Houchard44d59142018-12-13 18:46:22 +010028#include <proto/stream_interface.h>
Willy Tarreauea392822017-10-31 10:02:25 +010029#include <types/session.h>
Willy Tarreau5ab6b572017-09-22 08:05:00 +020030#include <eb32tree.h>
Willy Tarreau62f52692017-10-08 23:01:42 +020031
32
Willy Tarreauecb9dcd2019-01-03 12:00:17 +010033/* dummy streams returned for closed, error, refused, idle and states */
Willy Tarreau2a856182017-05-16 15:20:39 +020034static const struct h2s *h2_closed_stream;
Willy Tarreauecb9dcd2019-01-03 12:00:17 +010035static const struct h2s *h2_error_stream;
Willy Tarreau8d0d58b2018-12-23 18:29:12 +010036static const struct h2s *h2_refused_stream;
Willy Tarreau2a856182017-05-16 15:20:39 +020037static const struct h2s *h2_idle_stream;
38
Willy Tarreau5ab6b572017-09-22 08:05:00 +020039/* Connection flags (32 bit), in h2c->flags */
40#define H2_CF_NONE 0x00000000
41
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020042/* Flags indicating why writing to the mux is blocked. */
43#define H2_CF_MUX_MALLOC 0x00000001 // mux blocked on lack of connection's mux buffer
44#define H2_CF_MUX_MFULL 0x00000002 // mux blocked on connection's mux buffer full
45#define H2_CF_MUX_BLOCK_ANY 0x00000003 // aggregate of the mux flags above
46
Willy Tarreau315d8072017-12-10 22:17:57 +010047/* Flags indicating why writing to the demux is blocked.
48 * The first two ones directly affect the ability for the mux to receive data
49 * from the connection. The other ones affect the mux's ability to demux
50 * received data.
51 */
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020052#define H2_CF_DEM_DALLOC 0x00000004 // demux blocked on lack of connection's demux buffer
53#define H2_CF_DEM_DFULL 0x00000008 // demux blocked on connection's demux buffer full
Willy Tarreau315d8072017-12-10 22:17:57 +010054
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020055#define H2_CF_DEM_MBUSY 0x00000010 // demux blocked on connection's mux side busy
56#define H2_CF_DEM_MROOM 0x00000020 // demux blocked on lack of room in mux buffer
57#define H2_CF_DEM_SALLOC 0x00000040 // demux blocked on lack of stream's request buffer
58#define H2_CF_DEM_SFULL 0x00000080 // demux blocked on stream request buffer full
Willy Tarreauf2101912018-07-19 10:11:38 +020059#define H2_CF_DEM_TOOMANY 0x00000100 // demux blocked waiting for some conn_streams to leave
60#define H2_CF_DEM_BLOCK_ANY 0x000001F0 // aggregate of the demux flags above except DALLOC/DFULL
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020061
Willy Tarreau081d4722017-05-16 21:51:05 +020062/* other flags */
Willy Tarreauf2101912018-07-19 10:11:38 +020063#define H2_CF_GOAWAY_SENT 0x00001000 // a GOAWAY frame was successfully sent
64#define H2_CF_GOAWAY_FAILED 0x00002000 // a GOAWAY frame failed to be sent
65#define H2_CF_WAIT_FOR_HS 0x00004000 // We did check that at least a stream was waiting for handshake
Willy Tarreaub3fb56d2018-10-03 13:56:38 +020066#define H2_CF_IS_BACK 0x00008000 // this is an outgoing connection
Willy Tarreau97aaa672018-12-23 09:49:04 +010067#define H2_CF_WINDOW_OPENED 0x00010000 // demux increased window already advertised
Willy Tarreau081d4722017-05-16 21:51:05 +020068
Willy Tarreau5ab6b572017-09-22 08:05:00 +020069/* H2 connection state, in h2c->st0 */
70enum h2_cs {
71 H2_CS_PREFACE, // init done, waiting for connection preface
72 H2_CS_SETTINGS1, // preface OK, waiting for first settings frame
73 H2_CS_FRAME_H, // first settings frame ok, waiting for frame header
74 H2_CS_FRAME_P, // frame header OK, waiting for frame payload
Willy Tarreaua20a5192017-12-27 11:02:06 +010075 H2_CS_FRAME_A, // frame payload OK, trying to send ACK frame
76 H2_CS_FRAME_E, // frame payload OK, trying to send RST frame
Willy Tarreau5ab6b572017-09-22 08:05:00 +020077 H2_CS_ERROR, // send GOAWAY(errcode) and close the connection ASAP
78 H2_CS_ERROR2, // GOAWAY(errcode) sent, close the connection ASAP
79 H2_CS_ENTRIES // must be last
80} __attribute__((packed));
81
Willy Tarreau51330962019-05-26 09:38:07 +020082
Willy Tarreau9c218e72019-05-26 10:08:28 +020083/* 32 buffers: one for the ring's root, rest for the mbuf itself */
84#define H2C_MBUF_CNT 32
Willy Tarreau51330962019-05-26 09:38:07 +020085
Willy Tarreau5ab6b572017-09-22 08:05:00 +020086/* H2 connection descriptor */
87struct h2c {
88 struct connection *conn;
89
90 enum h2_cs st0; /* mux state */
91 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
92
93 /* 16 bit hole here */
94 uint32_t flags; /* connection flags: H2_CF_* */
Willy Tarreau2e2083a2019-01-31 10:34:07 +010095 uint32_t streams_limit; /* maximum number of concurrent streams the peer supports */
Willy Tarreau5ab6b572017-09-22 08:05:00 +020096 int32_t max_id; /* highest ID known on this connection, <0 before preface */
97 uint32_t rcvd_c; /* newly received data to ACK for the connection */
98 uint32_t rcvd_s; /* newly received data to ACK for the current stream (dsi) */
99
100 /* states for the demux direction */
101 struct hpack_dht *ddht; /* demux dynamic header table */
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200102 struct buffer dbuf; /* demux buffer */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200103
104 int32_t dsi; /* demux stream ID (<0 = idle) */
105 int32_t dfl; /* demux frame length (if dsi >= 0) */
106 int8_t dft; /* demux frame type (if dsi >= 0) */
107 int8_t dff; /* demux frame flags (if dsi >= 0) */
Willy Tarreau05e5daf2017-12-11 15:17:36 +0100108 uint8_t dpl; /* demux pad length (part of dfl), init to 0 */
109 /* 8 bit hole here */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200110 int32_t last_sid; /* last processed stream ID for GOAWAY, <0 before preface */
111
112 /* states for the mux direction */
Willy Tarreau51330962019-05-26 09:38:07 +0200113 struct buffer mbuf[H2C_MBUF_CNT]; /* mux buffers (ring) */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200114 int32_t msi; /* mux stream ID (<0 = idle) */
115 int32_t mfl; /* mux frame length (if dsi >= 0) */
116 int8_t mft; /* mux frame type (if dsi >= 0) */
117 int8_t mff; /* mux frame flags (if dsi >= 0) */
118 /* 16 bit hole here */
119 int32_t miw; /* mux initial window size for all new streams */
120 int32_t mws; /* mux window size. Can be negative. */
121 int32_t mfs; /* mux's max frame size */
122
Willy Tarreauea392822017-10-31 10:02:25 +0100123 int timeout; /* idle timeout duration in ticks */
Willy Tarreau599391a2017-11-24 10:16:00 +0100124 int shut_timeout; /* idle timeout duration in ticks after GOAWAY was sent */
Willy Tarreau49745612017-12-03 18:56:02 +0100125 unsigned int nb_streams; /* number of streams in the tree */
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200126 unsigned int nb_cs; /* number of attached conn_streams */
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100127 unsigned int nb_reserved; /* number of reserved streams */
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100128 unsigned int stream_cnt; /* total number of streams seen */
Willy Tarreau0b37d652018-10-03 10:33:02 +0200129 struct proxy *proxy; /* the proxy this connection was created for */
Willy Tarreauea392822017-10-31 10:02:25 +0100130 struct task *task; /* timeout management task */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200131 struct eb_root streams_by_id; /* all active streams by their ID */
132 struct list send_list; /* list of blocked streams requesting to send */
133 struct list fctl_list; /* list of streams blocked by connection's fctl */
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200134 struct list blocked_list; /* list of streams blocked for other reasons (e.g. sfctl, dep) */
Olivier Houchardd846c262018-10-19 17:24:29 +0200135 struct list sending_list; /* list of h2s scheduled to send data */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100136 struct buffer_wait buf_wait; /* wait list for buffer allocations */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200137 struct wait_event wait_event; /* To be used if we're waiting for I/Os */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200138};
139
Willy Tarreau18312642017-10-11 07:57:07 +0200140/* H2 stream state, in h2s->st */
141enum h2_ss {
142 H2_SS_IDLE = 0, // idle
143 H2_SS_RLOC, // reserved(local)
144 H2_SS_RREM, // reserved(remote)
145 H2_SS_OPEN, // open
146 H2_SS_HREM, // half-closed(remote)
147 H2_SS_HLOC, // half-closed(local)
Willy Tarreau96060ba2017-10-16 18:34:34 +0200148 H2_SS_ERROR, // an error needs to be sent using RST_STREAM
Willy Tarreau18312642017-10-11 07:57:07 +0200149 H2_SS_CLOSED, // closed
150 H2_SS_ENTRIES // must be last
151} __attribute__((packed));
152
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200153#define H2_SS_MASK(state) (1UL << (state))
154#define H2_SS_IDLE_BIT (1UL << H2_SS_IDLE)
155#define H2_SS_RLOC_BIT (1UL << H2_SS_RLOC)
156#define H2_SS_RREM_BIT (1UL << H2_SS_RREM)
157#define H2_SS_OPEN_BIT (1UL << H2_SS_OPEN)
158#define H2_SS_HREM_BIT (1UL << H2_SS_HREM)
159#define H2_SS_HLOC_BIT (1UL << H2_SS_HLOC)
160#define H2_SS_ERROR_BIT (1UL << H2_SS_ERROR)
161#define H2_SS_CLOSED_BIT (1UL << H2_SS_CLOSED)
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200162
Willy Tarreau18312642017-10-11 07:57:07 +0200163/* HTTP/2 stream flags (32 bit), in h2s->flags */
164#define H2_SF_NONE 0x00000000
165#define H2_SF_ES_RCVD 0x00000001
166#define H2_SF_ES_SENT 0x00000002
167
168#define H2_SF_RST_RCVD 0x00000004 // received RST_STREAM
169#define H2_SF_RST_SENT 0x00000008 // sent RST_STREAM
170
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200171/* stream flags indicating the reason the stream is blocked */
172#define H2_SF_BLK_MBUSY 0x00000010 // blocked waiting for mux access (transient)
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200173#define H2_SF_BLK_MROOM 0x00000020 // blocked waiting for room in the mux (must be in send list)
174#define H2_SF_BLK_MFCTL 0x00000040 // blocked due to mux fctl (must be in fctl list)
175#define H2_SF_BLK_SFCTL 0x00000080 // blocked due to stream fctl (must be in blocked list)
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200176#define H2_SF_BLK_ANY 0x000000F0 // any of the reasons above
177
Willy Tarreau454f9052017-10-26 19:40:35 +0200178/* stream flags indicating how data is supposed to be sent */
179#define H2_SF_DATA_CLEN 0x00000100 // data sent using content-length
Willy Tarreau454f9052017-10-26 19:40:35 +0200180
Christopher Faulet3e395632019-09-13 09:37:21 +0200181/* unused flags: 0x00000200, 0x00000400, 0x00000800 */
Willy Tarreau454f9052017-10-26 19:40:35 +0200182
Willy Tarreau67434202017-11-06 20:20:51 +0100183#define H2_SF_HEADERS_SENT 0x00001000 // a HEADERS frame was sent for this stream
Willy Tarreauc4312d32017-11-07 12:01:53 +0100184#define H2_SF_OUTGOING_DATA 0x00002000 // set whenever we've seen outgoing data
Willy Tarreau67434202017-11-06 20:20:51 +0100185
Willy Tarreau6cc85a52019-01-02 15:49:20 +0100186#define H2_SF_HEADERS_RCVD 0x00004000 // a HEADERS frame was received for this stream
187
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200188#define H2_SF_WANT_SHUTR 0x00008000 // a stream couldn't shutr() (mux full/busy)
189#define H2_SF_WANT_SHUTW 0x00010000 // a stream couldn't shutw() (mux full/busy)
Willy Tarreau3cf69fe2019-05-14 10:44:40 +0200190#define H2_SF_KILL_CONN 0x00020000 // kill the whole connection with this stream
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200191
192
Willy Tarreau18312642017-10-11 07:57:07 +0200193/* H2 stream descriptor, describing the stream as it appears in the H2C, and as
194 * it is being processed in the internal HTTP representation (H1 for now).
195 */
196struct h2s {
197 struct conn_stream *cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +0100198 struct session *sess;
Willy Tarreau18312642017-10-11 07:57:07 +0200199 struct h2c *h2c;
Willy Tarreaua40704a2018-09-11 13:52:04 +0200200 struct h1m h1m; /* request or response parser state for H1 */
Willy Tarreau18312642017-10-11 07:57:07 +0200201 struct eb32_node by_id; /* place in h2c's streams_by_id */
Willy Tarreau18312642017-10-11 07:57:07 +0200202 int32_t id; /* stream ID */
203 uint32_t flags; /* H2_SF_* */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +0200204 int sws; /* stream window size, to be added to the mux's initial window size */
Willy Tarreau18312642017-10-11 07:57:07 +0200205 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
206 enum h2_ss st;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +0200207 uint16_t status; /* HTTP response status */
Willy Tarreau1915ca22019-01-24 11:49:37 +0100208 unsigned long long body_len; /* remaining body length according to content-length if H2_SF_DATA_CLEN */
Olivier Houchard638b7992018-08-16 15:41:52 +0200209 struct buffer rxbuf; /* receive buffer, always valid (buf_empty or real buffer) */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200210 struct wait_event wait_event; /* Wait list, when we're attempting to send a RST but we can't send */
Willy Tarreau749f5ca2019-03-21 19:19:36 +0100211 struct wait_event *recv_wait; /* recv wait_event the conn_stream associated is waiting on (via h2_subscribe) */
212 struct wait_event *send_wait; /* send wait_event the conn_stream associated is waiting on (via h2_subscribe) */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200213 struct list list; /* To be used when adding in h2c->send_list or h2c->fctl_lsit */
Olivier Houchardd360ac62019-03-22 17:37:16 +0100214 struct list sending_list; /* To be used when adding in h2c->sending_list */
Willy Tarreau18312642017-10-11 07:57:07 +0200215};
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200216
Willy Tarreauc6405142017-09-21 20:23:50 +0200217/* descriptor for an h2 frame header */
218struct h2_fh {
219 uint32_t len; /* length, host order, 24 bits */
220 uint32_t sid; /* stream id, host order, 31 bits */
221 uint8_t ft; /* frame type */
222 uint8_t ff; /* frame flags */
223};
224
Willy Tarreau12ae2122019-08-08 18:23:12 +0200225/* trace source and events */
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200226static void h2_trace(enum trace_level level, uint64_t mask, \
227 const struct trace_source *src,
228 const struct ist where, const struct ist func,
229 const void *a1, const void *a2, const void *a3, const void *a4);
Willy Tarreau12ae2122019-08-08 18:23:12 +0200230
231/* The event representation is split like this :
232 * strm - application layer
233 * h2s - internal H2 stream
234 * h2c - internal H2 connection
235 * conn - external connection
236 *
237 */
238static const struct trace_event h2_trace_events[] = {
239#define H2_EV_H2C_NEW (1ULL << 0)
Willy Tarreau87951942019-08-30 07:34:36 +0200240 { .mask = H2_EV_H2C_NEW, .name = "h2c_new", .desc = "new H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200241#define H2_EV_H2C_RECV (1ULL << 1)
Willy Tarreau87951942019-08-30 07:34:36 +0200242 { .mask = H2_EV_H2C_RECV, .name = "h2c_recv", .desc = "Rx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200243#define H2_EV_H2C_SEND (1ULL << 2)
Willy Tarreau87951942019-08-30 07:34:36 +0200244 { .mask = H2_EV_H2C_SEND, .name = "h2c_send", .desc = "Tx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200245#define H2_EV_H2C_FCTL (1ULL << 3)
Willy Tarreau87951942019-08-30 07:34:36 +0200246 { .mask = H2_EV_H2C_FCTL, .name = "h2c_fctl", .desc = "H2 connection flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200247#define H2_EV_H2C_BLK (1ULL << 4)
Willy Tarreau87951942019-08-30 07:34:36 +0200248 { .mask = H2_EV_H2C_BLK, .name = "h2c_blk", .desc = "H2 connection blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200249#define H2_EV_H2C_WAKE (1ULL << 5)
Willy Tarreau87951942019-08-30 07:34:36 +0200250 { .mask = H2_EV_H2C_WAKE, .name = "h2c_wake", .desc = "H2 connection woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200251#define H2_EV_H2C_END (1ULL << 6)
Willy Tarreau87951942019-08-30 07:34:36 +0200252 { .mask = H2_EV_H2C_END, .name = "h2c_end", .desc = "H2 connection terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200253#define H2_EV_H2C_ERR (1ULL << 7)
Willy Tarreau87951942019-08-30 07:34:36 +0200254 { .mask = H2_EV_H2C_ERR, .name = "h2c_err", .desc = "error on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200255#define H2_EV_RX_FHDR (1ULL << 8)
Willy Tarreau87951942019-08-30 07:34:36 +0200256 { .mask = H2_EV_RX_FHDR, .name = "rx_fhdr", .desc = "H2 frame header received" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200257#define H2_EV_RX_FRAME (1ULL << 9)
Willy Tarreau87951942019-08-30 07:34:36 +0200258 { .mask = H2_EV_RX_FRAME, .name = "rx_frame", .desc = "receipt of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200259#define H2_EV_RX_EOI (1ULL << 10)
Willy Tarreau87951942019-08-30 07:34:36 +0200260 { .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 +0200261#define H2_EV_RX_PREFACE (1ULL << 11)
Willy Tarreau87951942019-08-30 07:34:36 +0200262 { .mask = H2_EV_RX_PREFACE, .name = "rx_preface", .desc = "receipt of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200263#define H2_EV_RX_DATA (1ULL << 12)
Willy Tarreau87951942019-08-30 07:34:36 +0200264 { .mask = H2_EV_RX_DATA, .name = "rx_data", .desc = "receipt of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200265#define H2_EV_RX_HDR (1ULL << 13)
Willy Tarreau87951942019-08-30 07:34:36 +0200266 { .mask = H2_EV_RX_HDR, .name = "rx_hdr", .desc = "receipt of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200267#define H2_EV_RX_PRIO (1ULL << 14)
Willy Tarreau87951942019-08-30 07:34:36 +0200268 { .mask = H2_EV_RX_PRIO, .name = "rx_prio", .desc = "receipt of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200269#define H2_EV_RX_RST (1ULL << 15)
Willy Tarreau87951942019-08-30 07:34:36 +0200270 { .mask = H2_EV_RX_RST, .name = "rx_rst", .desc = "receipt of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200271#define H2_EV_RX_SETTINGS (1ULL << 16)
Willy Tarreau87951942019-08-30 07:34:36 +0200272 { .mask = H2_EV_RX_SETTINGS, .name = "rx_settings", .desc = "receipt of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200273#define H2_EV_RX_PUSH (1ULL << 17)
Willy Tarreau87951942019-08-30 07:34:36 +0200274 { .mask = H2_EV_RX_PUSH, .name = "rx_push", .desc = "receipt of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200275#define H2_EV_RX_PING (1ULL << 18)
Willy Tarreau87951942019-08-30 07:34:36 +0200276 { .mask = H2_EV_RX_PING, .name = "rx_ping", .desc = "receipt of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200277#define H2_EV_RX_GOAWAY (1ULL << 19)
Willy Tarreau87951942019-08-30 07:34:36 +0200278 { .mask = H2_EV_RX_GOAWAY, .name = "rx_goaway", .desc = "receipt of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200279#define H2_EV_RX_WU (1ULL << 20)
Willy Tarreau87951942019-08-30 07:34:36 +0200280 { .mask = H2_EV_RX_WU, .name = "rx_wu", .desc = "receipt of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200281#define H2_EV_RX_CONT (1ULL << 21)
Willy Tarreau87951942019-08-30 07:34:36 +0200282 { .mask = H2_EV_RX_CONT, .name = "rx_cont", .desc = "receipt of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200283#define H2_EV_TX_FRAME (1ULL << 22)
Willy Tarreau87951942019-08-30 07:34:36 +0200284 { .mask = H2_EV_TX_FRAME, .name = "tx_frame", .desc = "transmission of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200285#define H2_EV_TX_EOI (1ULL << 23)
Willy Tarreau87951942019-08-30 07:34:36 +0200286 { .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 +0200287#define H2_EV_TX_PREFACE (1ULL << 24)
Willy Tarreau87951942019-08-30 07:34:36 +0200288 { .mask = H2_EV_TX_PREFACE, .name = "tx_preface", .desc = "transmission of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200289#define H2_EV_TX_DATA (1ULL << 25)
Willy Tarreau87951942019-08-30 07:34:36 +0200290 { .mask = H2_EV_TX_DATA, .name = "tx_data", .desc = "transmission of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200291#define H2_EV_TX_HDR (1ULL << 26)
Willy Tarreau87951942019-08-30 07:34:36 +0200292 { .mask = H2_EV_TX_HDR, .name = "tx_hdr", .desc = "transmission of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200293#define H2_EV_TX_PRIO (1ULL << 27)
Willy Tarreau87951942019-08-30 07:34:36 +0200294 { .mask = H2_EV_TX_PRIO, .name = "tx_prio", .desc = "transmission of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200295#define H2_EV_TX_RST (1ULL << 28)
Willy Tarreau87951942019-08-30 07:34:36 +0200296 { .mask = H2_EV_TX_RST, .name = "tx_rst", .desc = "transmission of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200297#define H2_EV_TX_SETTINGS (1ULL << 29)
Willy Tarreau87951942019-08-30 07:34:36 +0200298 { .mask = H2_EV_TX_SETTINGS, .name = "tx_settings", .desc = "transmission of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200299#define H2_EV_TX_PUSH (1ULL << 30)
Willy Tarreau87951942019-08-30 07:34:36 +0200300 { .mask = H2_EV_TX_PUSH, .name = "tx_push", .desc = "transmission of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200301#define H2_EV_TX_PING (1ULL << 31)
Willy Tarreau87951942019-08-30 07:34:36 +0200302 { .mask = H2_EV_TX_PING, .name = "tx_ping", .desc = "transmission of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200303#define H2_EV_TX_GOAWAY (1ULL << 32)
Willy Tarreau87951942019-08-30 07:34:36 +0200304 { .mask = H2_EV_TX_GOAWAY, .name = "tx_goaway", .desc = "transmission of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200305#define H2_EV_TX_WU (1ULL << 33)
Willy Tarreau87951942019-08-30 07:34:36 +0200306 { .mask = H2_EV_TX_WU, .name = "tx_wu", .desc = "transmission of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200307#define H2_EV_TX_CONT (1ULL << 34)
Willy Tarreau87951942019-08-30 07:34:36 +0200308 { .mask = H2_EV_TX_CONT, .name = "tx_cont", .desc = "transmission of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200309#define H2_EV_H2S_NEW (1ULL << 35)
Willy Tarreau87951942019-08-30 07:34:36 +0200310 { .mask = H2_EV_H2S_NEW, .name = "h2s_new", .desc = "new H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200311#define H2_EV_H2S_RECV (1ULL << 36)
Willy Tarreau87951942019-08-30 07:34:36 +0200312 { .mask = H2_EV_H2S_RECV, .name = "h2s_recv", .desc = "Rx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200313#define H2_EV_H2S_SEND (1ULL << 37)
Willy Tarreau87951942019-08-30 07:34:36 +0200314 { .mask = H2_EV_H2S_SEND, .name = "h2s_send", .desc = "Tx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200315#define H2_EV_H2S_FCTL (1ULL << 38)
Willy Tarreau87951942019-08-30 07:34:36 +0200316 { .mask = H2_EV_H2S_FCTL, .name = "h2s_fctl", .desc = "H2 stream flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200317#define H2_EV_H2S_BLK (1ULL << 39)
Willy Tarreau87951942019-08-30 07:34:36 +0200318 { .mask = H2_EV_H2S_BLK, .name = "h2s_blk", .desc = "H2 stream blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200319#define H2_EV_H2S_WAKE (1ULL << 40)
Willy Tarreau87951942019-08-30 07:34:36 +0200320 { .mask = H2_EV_H2S_WAKE, .name = "h2s_wake", .desc = "H2 stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200321#define H2_EV_H2S_END (1ULL << 41)
Willy Tarreau87951942019-08-30 07:34:36 +0200322 { .mask = H2_EV_H2S_END, .name = "h2s_end", .desc = "H2 stream terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200323#define H2_EV_H2S_ERR (1ULL << 42)
Willy Tarreau87951942019-08-30 07:34:36 +0200324 { .mask = H2_EV_H2S_ERR, .name = "h2s_err", .desc = "error on H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200325#define H2_EV_STRM_NEW (1ULL << 43)
Willy Tarreau87951942019-08-30 07:34:36 +0200326 { .mask = H2_EV_STRM_NEW, .name = "strm_new", .desc = "app-layer stream creation" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200327#define H2_EV_STRM_RECV (1ULL << 44)
Willy Tarreau87951942019-08-30 07:34:36 +0200328 { .mask = H2_EV_STRM_RECV, .name = "strm_recv", .desc = "receiving data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200329#define H2_EV_STRM_SEND (1ULL << 45)
Willy Tarreau87951942019-08-30 07:34:36 +0200330 { .mask = H2_EV_STRM_SEND, .name = "strm_send", .desc = "sending data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200331#define H2_EV_STRM_FULL (1ULL << 46)
Willy Tarreau87951942019-08-30 07:34:36 +0200332 { .mask = H2_EV_STRM_FULL, .name = "strm_full", .desc = "stream buffer full" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200333#define H2_EV_STRM_WAKE (1ULL << 47)
Willy Tarreau87951942019-08-30 07:34:36 +0200334 { .mask = H2_EV_STRM_WAKE, .name = "strm_wake", .desc = "stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200335#define H2_EV_STRM_SHUT (1ULL << 48)
Willy Tarreau87951942019-08-30 07:34:36 +0200336 { .mask = H2_EV_STRM_SHUT, .name = "strm_shut", .desc = "stream shutdown" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200337#define H2_EV_STRM_END (1ULL << 49)
Willy Tarreau87951942019-08-30 07:34:36 +0200338 { .mask = H2_EV_STRM_END, .name = "strm_end", .desc = "detaching app-layer stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200339#define H2_EV_STRM_ERR (1ULL << 50)
Willy Tarreau87951942019-08-30 07:34:36 +0200340 { .mask = H2_EV_STRM_ERR, .name = "strm_err", .desc = "stream error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200341#define H2_EV_PROTO_ERR (1ULL << 51)
Willy Tarreau87951942019-08-30 07:34:36 +0200342 { .mask = H2_EV_PROTO_ERR, .name = "proto_err", .desc = "protocol error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200343 { }
344};
345
346static const struct name_desc h2_trace_lockon_args[4] = {
347 /* arg1 */ { /* already used by the connection */ },
348 /* arg2 */ { .name="h2s", .desc="H2 stream" },
349 /* arg3 */ { },
350 /* arg4 */ { }
351};
352
353static const struct name_desc h2_trace_decoding[] = {
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200354#define H2_VERB_CLEAN 1
355 { .name="clean", .desc="only user-friendly stuff, generally suitable for level \"user\"" },
356#define H2_VERB_MINIMAL 2
Willy Tarreau12ae2122019-08-08 18:23:12 +0200357 { .name="minimal", .desc="report only h2c/h2s state and flags, no real decoding" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200358#define H2_VERB_SIMPLE 3
Willy Tarreau12ae2122019-08-08 18:23:12 +0200359 { .name="simple", .desc="add request/response status line or frame info when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200360#define H2_VERB_ADVANCED 4
Willy Tarreau12ae2122019-08-08 18:23:12 +0200361 { .name="advanced", .desc="add header fields or frame decoding when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200362#define H2_VERB_COMPLETE 5
Willy Tarreau12ae2122019-08-08 18:23:12 +0200363 { .name="complete", .desc="add full data dump when available" },
364 { /* end */ }
365};
366
367static struct trace_source trace_h2 = {
368 .name = IST("h2"),
369 .desc = "HTTP/2 multiplexer",
370 .arg_def = TRC_ARG1_CONN, // TRACE()'s first argument is always a connection
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200371 .default_cb = h2_trace,
Willy Tarreau12ae2122019-08-08 18:23:12 +0200372 .known_events = h2_trace_events,
373 .lockon_args = h2_trace_lockon_args,
374 .decoding = h2_trace_decoding,
375 .report_events = ~0, // report everything by default
376};
377
378#define TRACE_SOURCE &trace_h2
379INITCALL1(STG_REGISTER, trace_register_source, TRACE_SOURCE);
380
Willy Tarreau8ceae722018-11-26 11:58:30 +0100381/* the h2c connection pool */
382DECLARE_STATIC_POOL(pool_head_h2c, "h2c", sizeof(struct h2c));
383
384/* the h2s stream pool */
385DECLARE_STATIC_POOL(pool_head_h2s, "h2s", sizeof(struct h2s));
386
Willy Tarreaudc572362018-12-12 08:08:05 +0100387/* The default connection window size is 65535, it may only be enlarged using
388 * a WINDOW_UPDATE message. Since the window must never be larger than 2G-1,
389 * we'll pretend we already received the difference between the two to send
390 * an equivalent window update to enlarge it to 2G-1.
391 */
392#define H2_INITIAL_WINDOW_INCREMENT ((1U<<31)-1 - 65535)
393
Willy Tarreau455d5682019-05-24 19:42:18 +0200394/* maximum amount of data we're OK with re-aligning for buffer optimizations */
395#define MAX_DATA_REALIGN 1024
396
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200397/* a few settings from the global section */
398static int h2_settings_header_table_size = 4096; /* initial value */
Willy Tarreaue6baec02017-07-27 11:45:11 +0200399static int h2_settings_initial_window_size = 65535; /* initial value */
Willy Tarreau5a490b62019-01-31 10:39:51 +0100400static unsigned int h2_settings_max_concurrent_streams = 100;
Willy Tarreaua24b35c2019-02-21 13:24:36 +0100401static int h2_settings_max_frame_size = 0; /* unset */
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200402
Willy Tarreau2a856182017-05-16 15:20:39 +0200403/* a dmumy closed stream */
404static const struct h2s *h2_closed_stream = &(const struct h2s){
405 .cs = NULL,
406 .h2c = NULL,
407 .st = H2_SS_CLOSED,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100408 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreauab837502017-12-27 15:07:30 +0100409 .flags = H2_SF_RST_RCVD,
Willy Tarreau2a856182017-05-16 15:20:39 +0200410 .id = 0,
411};
412
Willy Tarreauecb9dcd2019-01-03 12:00:17 +0100413/* a dmumy closed stream returning a PROTOCOL_ERROR error */
414static const struct h2s *h2_error_stream = &(const struct h2s){
415 .cs = NULL,
416 .h2c = NULL,
417 .st = H2_SS_CLOSED,
418 .errcode = H2_ERR_PROTOCOL_ERROR,
419 .flags = 0,
420 .id = 0,
421};
422
Willy Tarreau8d0d58b2018-12-23 18:29:12 +0100423/* a dmumy closed stream returning a REFUSED_STREAM error */
424static const struct h2s *h2_refused_stream = &(const struct h2s){
425 .cs = NULL,
426 .h2c = NULL,
427 .st = H2_SS_CLOSED,
428 .errcode = H2_ERR_REFUSED_STREAM,
429 .flags = 0,
430 .id = 0,
431};
432
Willy Tarreau2a856182017-05-16 15:20:39 +0200433/* and a dummy idle stream for use with any unannounced stream */
434static const struct h2s *h2_idle_stream = &(const struct h2s){
435 .cs = NULL,
436 .h2c = NULL,
437 .st = H2_SS_IDLE,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100438 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreau2a856182017-05-16 15:20:39 +0200439 .id = 0,
440};
441
Olivier Houchard9f6af332018-05-25 14:04:04 +0200442static struct task *h2_timeout_task(struct task *t, void *context, unsigned short state);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +0200443static int h2_send(struct h2c *h2c);
444static int h2_recv(struct h2c *h2c);
Olivier Houchard7505f942018-08-21 18:10:44 +0200445static int h2_process(struct h2c *h2c);
Olivier Houchard29fb89d2018-08-02 18:56:36 +0200446static struct task *h2_io_cb(struct task *t, void *ctx, unsigned short state);
Willy Tarreau0b559072018-02-26 15:22:17 +0100447static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id);
Willy Tarreau4790f7c2019-01-24 11:33:02 +0100448static int h2c_decode_headers(struct h2c *h2c, struct buffer *rxbuf, uint32_t *flags, unsigned long long *body_len);
Willy Tarreaua56a6de2018-02-26 15:59:07 +0100449static int h2_frt_transfer_data(struct h2s *h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +0200450static struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned short state);
Olivier Houchardf502aca2018-12-14 19:42:40 +0100451static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess);
Willy Tarreau8b2757c2018-12-19 17:36:48 +0100452static void h2s_alert(struct h2s *h2s);
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200453
Willy Tarreauab2ec452019-08-30 07:07:08 +0200454/* returns a h2c state as an abbreviated 3-letter string, or "???" if unknown */
455static inline const char *h2c_st_to_str(enum h2_cs st)
456{
457 switch (st) {
458 case H2_CS_PREFACE: return "PRF";
459 case H2_CS_SETTINGS1: return "STG";
460 case H2_CS_FRAME_H: return "FRH";
461 case H2_CS_FRAME_P: return "FRP";
462 case H2_CS_FRAME_A: return "FRA";
463 case H2_CS_FRAME_E: return "FRE";
464 case H2_CS_ERROR: return "ERR";
465 case H2_CS_ERROR2: return "ER2";
466 default: return "???";
467 }
468}
469
470/* returns a h2s state as an abbreviated 3-letter string, or "???" if unknown */
471static inline const char *h2s_st_to_str(enum h2_ss st)
472{
473 switch (st) {
474 case H2_SS_IDLE: return "IDL"; // idle
475 case H2_SS_RLOC: return "RSL"; // reserved local
476 case H2_SS_RREM: return "RSR"; // reserved remote
477 case H2_SS_OPEN: return "OPN"; // open
478 case H2_SS_HREM: return "HCR"; // half-closed remote
479 case H2_SS_HLOC: return "HCL"; // half-closed local
480 case H2_SS_ERROR : return "ERR"; // error
481 case H2_SS_CLOSED: return "CLO"; // closed
482 default: return "???";
483 }
484}
485
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200486/* the H2 traces always expect that arg1, if non-null, is of type connection
487 * (from which we can derive h2c), that arg2, if non-null, is of type h2s, and
488 * that arg3, if non-null, is either of type htx for tx headers, or of type
489 * buffer for everything else.
490 */
491static void h2_trace(enum trace_level level, uint64_t mask, const struct trace_source *src,
492 const struct ist where, const struct ist func,
493 const void *a1, const void *a2, const void *a3, const void *a4)
494{
495 const struct connection *conn = a1;
496 const struct h2c *h2c = conn ? conn->ctx : NULL;
497 const struct h2s *h2s = a2;
498 const struct buffer *buf = a3;
499 const struct htx *htx;
500 int pos;
501
502 if (!h2c) // nothing to add
503 return;
504
Willy Tarreau17104d42019-08-30 07:12:55 +0200505 if (src->verbosity > H2_VERB_CLEAN) {
Willy Tarreau73db4342019-09-25 07:28:44 +0200506 chunk_appendf(&trace_buf, " : h2c=%p(%c,%s)", h2c, conn_is_back(conn) ? 'B' : 'F', h2c_st_to_str(h2c->st0));
507
508 if (h2c->dsi >= 0 &&
509 (mask & (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) == (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) {
510 chunk_appendf(&trace_buf, " dft=%s/%02x", h2_ft_str(h2c->dft), h2c->dff);
511 }
512
513 if (h2s) {
514 if (h2s->id <= 0)
515 chunk_appendf(&trace_buf, " dsi=%d", h2c->dsi);
516 chunk_appendf(&trace_buf, " h2s=%p(%d,%s)", h2s, h2s->id, h2s_st_to_str(h2s->st));
517 }
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200518 }
519
520 /* Let's dump decoded requests and responses right after parsing. They
521 * are traced at level USER with a few recognizable flags.
522 */
523 if ((mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW) ||
524 mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR)) && buf)
525 htx = htxbuf(buf); // recv req/res
526 else if (mask == (H2_EV_TX_FRAME|H2_EV_TX_HDR))
527 htx = a3; // send req/res
528 else
529 htx = NULL;
530
Willy Tarreau94f1dcf2019-08-30 07:11:30 +0200531 if (level == TRACE_LEVEL_USER && src->verbosity != H2_VERB_MINIMAL && htx && (pos = htx_get_head(htx)) != -1) {
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200532 const struct htx_blk *blk = htx_get_blk(htx, pos);
533 const struct htx_sl *sl = htx_get_blk_ptr(htx, blk);
534 enum htx_blk_type type = htx_get_blk_type(blk);
535
536 if (type == HTX_BLK_REQ_SL)
537 chunk_appendf(&trace_buf, " : [%d] H2 REQ: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200538 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200539 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
540 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
541 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
542 else if (type == HTX_BLK_RES_SL)
543 chunk_appendf(&trace_buf, " : [%d] H2 RES: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200544 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200545 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
546 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
547 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
548 }
549}
550
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200551/* returns true if the connection is allowed to expire, false otherwise. A
552 * connection may expire when:
553 * - it has no stream
554 * - it has data in the mux buffer
555 * - it has streams in the blocked list
556 * - it has streams in the fctl list
557 * - it has streams in the send list
558 * Otherwise it means some streams are waiting in the data layer and it should
559 * not expire.
560 */
561static inline int h2c_may_expire(const struct h2c *h2c)
562{
563 return eb_is_empty(&h2c->streams_by_id) ||
564 br_data(h2c->mbuf) ||
565 !LIST_ISEMPTY(&h2c->blocked_list) ||
566 !LIST_ISEMPTY(&h2c->fctl_list) ||
567 !LIST_ISEMPTY(&h2c->send_list) ||
568 !LIST_ISEMPTY(&h2c->sending_list);
569}
570
Olivier Houchard7a977432019-03-21 15:47:13 +0100571static __inline int
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200572h2c_is_dead(const struct h2c *h2c)
Olivier Houchard7a977432019-03-21 15:47:13 +0100573{
574 if (eb_is_empty(&h2c->streams_by_id) && /* don't close if streams exist */
575 ((h2c->conn->flags & CO_FL_ERROR) || /* errors close immediately */
576 (h2c->st0 >= H2_CS_ERROR && !h2c->task) || /* a timeout stroke earlier */
577 (!(h2c->conn->owner)) || /* Nobody's left to take care of the connection, drop it now */
Willy Tarreau662fafc2019-05-26 09:43:07 +0200578 (!br_data(h2c->mbuf) && /* mux buffer empty, also process clean events below */
Olivier Houchard7a977432019-03-21 15:47:13 +0100579 (conn_xprt_read0_pending(h2c->conn) ||
580 (h2c->last_sid >= 0 && h2c->max_id >= h2c->last_sid)))))
581 return 1;
582
583 return 0;
Olivier Houchard7a977432019-03-21 15:47:13 +0100584}
585
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200586/*****************************************************/
587/* functions below are for dynamic buffer management */
588/*****************************************************/
589
Willy Tarreau315d8072017-12-10 22:17:57 +0100590/* indicates whether or not the we may call the h2_recv() function to attempt
591 * to receive data into the buffer and/or demux pending data. The condition is
592 * a bit complex due to some API limits for now. The rules are the following :
593 * - if an error or a shutdown was detected on the connection and the buffer
594 * is empty, we must not attempt to receive
595 * - if the demux buf failed to be allocated, we must not try to receive and
596 * we know there is nothing pending
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100597 * - if no flag indicates a blocking condition, we may attempt to receive,
598 * regardless of whether the demux buffer is full or not, so that only
599 * de demux part decides whether or not to block. This is needed because
600 * the connection API indeed prevents us from re-enabling receipt that is
601 * already enabled in a polled state, so we must always immediately stop
602 * as soon as the demux can't proceed so as never to hit an end of read
603 * with data pending in the buffers.
Willy Tarreau315d8072017-12-10 22:17:57 +0100604 * - otherwise must may not attempt
605 */
606static inline int h2_recv_allowed(const struct h2c *h2c)
607{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200608 if (b_data(&h2c->dbuf) == 0 &&
Willy Tarreau315d8072017-12-10 22:17:57 +0100609 (h2c->st0 >= H2_CS_ERROR ||
610 h2c->conn->flags & CO_FL_ERROR ||
611 conn_xprt_read0_pending(h2c->conn)))
612 return 0;
613
614 if (!(h2c->flags & H2_CF_DEM_DALLOC) &&
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100615 !(h2c->flags & H2_CF_DEM_BLOCK_ANY))
Willy Tarreau315d8072017-12-10 22:17:57 +0100616 return 1;
617
618 return 0;
619}
620
Willy Tarreau47b515a2018-12-21 16:09:41 +0100621/* restarts reading on the connection if it was not enabled */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200622static inline void h2c_restart_reading(const struct h2c *h2c, int consider_buffer)
Willy Tarreau47b515a2018-12-21 16:09:41 +0100623{
624 if (!h2_recv_allowed(h2c))
625 return;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200626 if ((!consider_buffer || !b_data(&h2c->dbuf))
627 && (h2c->wait_event.events & SUB_RETRY_RECV))
Willy Tarreau47b515a2018-12-21 16:09:41 +0100628 return;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200629 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau47b515a2018-12-21 16:09:41 +0100630}
631
632
Willy Tarreaufa1d3572019-01-31 10:31:51 +0100633/* returns true if the front connection has too many conn_streams attached */
634static inline int h2_frt_has_too_many_cs(const struct h2c *h2c)
Willy Tarreauf2101912018-07-19 10:11:38 +0200635{
Willy Tarreaua8754662018-12-23 20:43:58 +0100636 return h2c->nb_cs > h2_settings_max_concurrent_streams;
Willy Tarreauf2101912018-07-19 10:11:38 +0200637}
638
Willy Tarreau44e973f2018-03-01 17:49:30 +0100639/* Tries to grab a buffer and to re-enable processing on mux <target>. The h2c
640 * flags are used to figure what buffer was requested. It returns 1 if the
641 * allocation succeeds, in which case the connection is woken up, or 0 if it's
642 * impossible to wake up and we prefer to be woken up later.
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200643 */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100644static int h2_buf_available(void *target)
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200645{
646 struct h2c *h2c = target;
Willy Tarreau0b559072018-02-26 15:22:17 +0100647 struct h2s *h2s;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200648
Willy Tarreau44e973f2018-03-01 17:49:30 +0100649 if ((h2c->flags & H2_CF_DEM_DALLOC) && b_alloc_margin(&h2c->dbuf, 0)) {
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200650 h2c->flags &= ~H2_CF_DEM_DALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200651 h2c_restart_reading(h2c, 1);
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200652 return 1;
653 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200654
Willy Tarreau51330962019-05-26 09:38:07 +0200655 if ((h2c->flags & H2_CF_MUX_MALLOC) && b_alloc_margin(br_tail(h2c->mbuf), 0)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100656 h2c->flags &= ~H2_CF_MUX_MALLOC;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200657
658 if (h2c->flags & H2_CF_DEM_MROOM) {
659 h2c->flags &= ~H2_CF_DEM_MROOM;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200660 h2c_restart_reading(h2c, 1);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200661 }
Willy Tarreau14398122017-09-22 14:26:04 +0200662 return 1;
663 }
Willy Tarreau0b559072018-02-26 15:22:17 +0100664
665 if ((h2c->flags & H2_CF_DEM_SALLOC) &&
666 (h2s = h2c_st_by_id(h2c, h2c->dsi)) && h2s->cs &&
Olivier Houchard638b7992018-08-16 15:41:52 +0200667 b_alloc_margin(&h2s->rxbuf, 0)) {
Willy Tarreau0b559072018-02-26 15:22:17 +0100668 h2c->flags &= ~H2_CF_DEM_SALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200669 h2c_restart_reading(h2c, 1);
Willy Tarreau0b559072018-02-26 15:22:17 +0100670 return 1;
671 }
672
Willy Tarreau14398122017-09-22 14:26:04 +0200673 return 0;
674}
675
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200676static inline struct buffer *h2_get_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200677{
678 struct buffer *buf = NULL;
679
Willy Tarreauc234ae32019-05-13 17:56:11 +0200680 if (likely(!LIST_ADDED(&h2c->buf_wait.list)) &&
Willy Tarreau44e973f2018-03-01 17:49:30 +0100681 unlikely((buf = b_alloc_margin(bptr, 0)) == NULL)) {
682 h2c->buf_wait.target = h2c;
683 h2c->buf_wait.wakeup_cb = h2_buf_available;
Christopher Faulet2a944ee2017-11-07 10:42:54 +0100684 HA_SPIN_LOCK(BUF_WQ_LOCK, &buffer_wq_lock);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100685 LIST_ADDQ(&buffer_wq, &h2c->buf_wait.list);
Christopher Faulet2a944ee2017-11-07 10:42:54 +0100686 HA_SPIN_UNLOCK(BUF_WQ_LOCK, &buffer_wq_lock);
Willy Tarreau14398122017-09-22 14:26:04 +0200687 __conn_xprt_stop_recv(h2c->conn);
688 }
689 return buf;
690}
691
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200692static inline void h2_release_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200693{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200694 if (bptr->size) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100695 b_free(bptr);
Willy Tarreau201840a2019-05-29 17:50:48 +0200696 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau14398122017-09-22 14:26:04 +0200697 }
698}
699
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200700static inline void h2_release_mbuf(struct h2c *h2c)
701{
702 struct buffer *buf;
703 unsigned int count = 0;
704
705 while (b_size(buf = br_head_pick(h2c->mbuf))) {
706 b_free(buf);
707 count++;
708 }
709 if (count)
Willy Tarreau201840a2019-05-29 17:50:48 +0200710 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200711}
712
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100713/* returns the number of allocatable outgoing streams for the connection taking
714 * the last_sid and the reserved ones into account.
715 */
716static inline int h2_streams_left(const struct h2c *h2c)
717{
718 int ret;
719
720 /* consider the number of outgoing streams we're allowed to create before
721 * reaching the last GOAWAY frame seen. max_id is the last assigned id,
722 * nb_reserved is the number of streams which don't yet have an ID.
723 */
724 ret = (h2c->last_sid >= 0) ? h2c->last_sid : 0x7FFFFFFF;
725 ret = (unsigned int)(ret - h2c->max_id) / 2 - h2c->nb_reserved - 1;
726 if (ret < 0)
727 ret = 0;
728 return ret;
729}
730
Willy Tarreau00f18a32019-01-26 12:19:01 +0100731/* returns the number of streams in use on a connection to figure if it's
732 * idle or not. We check nb_cs and not nb_streams as the caller will want
733 * to know if it was the last one after a detach().
734 */
735static int h2_used_streams(struct connection *conn)
736{
737 struct h2c *h2c = conn->ctx;
738
739 return h2c->nb_cs;
740}
741
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100742/* returns the number of concurrent streams available on the connection */
Olivier Houchardd540b362018-11-05 18:37:53 +0100743static int h2_avail_streams(struct connection *conn)
744{
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100745 struct server *srv = objt_server(conn->target);
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100746 struct h2c *h2c = conn->ctx;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100747 int ret1, ret2;
Olivier Houchardd540b362018-11-05 18:37:53 +0100748
Willy Tarreau6afec462019-01-28 06:40:19 +0100749 /* RFC7540#6.8: Receivers of a GOAWAY frame MUST NOT open additional
750 * streams on the connection.
751 */
752 if (h2c->last_sid >= 0)
753 return 0;
754
Willy Tarreau86949782019-01-31 10:42:05 +0100755 /* note: may be negative if a SETTINGS frame changes the limit */
756 ret1 = h2c->streams_limit - h2c->nb_streams;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100757
758 /* we must also consider the limit imposed by stream IDs */
759 ret2 = h2_streams_left(h2c);
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100760 ret1 = MIN(ret1, ret2);
Willy Tarreau86949782019-01-31 10:42:05 +0100761 if (ret1 > 0 && srv && srv->max_reuse >= 0) {
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100762 ret2 = h2c->stream_cnt <= srv->max_reuse ? srv->max_reuse - h2c->stream_cnt + 1: 0;
763 ret1 = MIN(ret1, ret2);
764 }
765 return ret1;
Olivier Houchardd540b362018-11-05 18:37:53 +0100766}
767
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200768
Willy Tarreau62f52692017-10-08 23:01:42 +0200769/*****************************************************************/
770/* functions below are dedicated to the mux setup and management */
771/*****************************************************************/
772
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200773/* Initialize the mux once it's attached. For outgoing connections, the context
774 * is already initialized before installing the mux, so we detect incoming
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200775 * connections from the fact that the context is still NULL (even during mux
776 * upgrades). <input> is always used as Input buffer and may contain data. It is
777 * the caller responsibility to not reuse it anymore. Returns < 0 on error.
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200778 */
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200779static int h2_init(struct connection *conn, struct proxy *prx, struct session *sess,
780 struct buffer *input)
Willy Tarreau32218eb2017-09-22 08:07:25 +0200781{
782 struct h2c *h2c;
Willy Tarreauea392822017-10-31 10:02:25 +0100783 struct task *t = NULL;
Christopher Fauletf81ef032019-10-04 15:19:43 +0200784 void *conn_ctx = conn->ctx;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200785
Christopher Fauletf81ef032019-10-04 15:19:43 +0200786 TRACE_ENTER(H2_EV_H2C_NEW);
Willy Tarreau7838a792019-08-12 18:42:03 +0200787
Willy Tarreaubafbe012017-11-24 17:34:44 +0100788 h2c = pool_alloc(pool_head_h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200789 if (!h2c)
mildiscd2d7de2018-10-02 16:44:18 +0200790 goto fail_no_h2c;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200791
Christopher Faulete9b70722019-04-08 10:46:02 +0200792 if (conn_is_back(conn)) {
Willy Tarreau01b44822018-10-03 14:26:37 +0200793 h2c->flags = H2_CF_IS_BACK;
794 h2c->shut_timeout = h2c->timeout = prx->timeout.server;
795 if (tick_isset(prx->timeout.serverfin))
796 h2c->shut_timeout = prx->timeout.serverfin;
797 } else {
798 h2c->flags = H2_CF_NONE;
799 h2c->shut_timeout = h2c->timeout = prx->timeout.client;
800 if (tick_isset(prx->timeout.clientfin))
801 h2c->shut_timeout = prx->timeout.clientfin;
802 }
Willy Tarreau3f133572017-10-31 19:21:06 +0100803
Willy Tarreau0b37d652018-10-03 10:33:02 +0200804 h2c->proxy = prx;
Willy Tarreau33400292017-11-05 11:23:40 +0100805 h2c->task = NULL;
Willy Tarreau3f133572017-10-31 19:21:06 +0100806 if (tick_isset(h2c->timeout)) {
807 t = task_new(tid_bit);
808 if (!t)
809 goto fail;
810
811 h2c->task = t;
812 t->process = h2_timeout_task;
813 t->context = h2c;
814 t->expire = tick_add(now_ms, h2c->timeout);
815 }
Willy Tarreauea392822017-10-31 10:02:25 +0100816
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200817 h2c->wait_event.tasklet = tasklet_new();
818 if (!h2c->wait_event.tasklet)
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200819 goto fail;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200820 h2c->wait_event.tasklet->process = h2_io_cb;
821 h2c->wait_event.tasklet->context = h2c;
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100822 h2c->wait_event.events = 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200823
Willy Tarreau32218eb2017-09-22 08:07:25 +0200824 h2c->ddht = hpack_dht_alloc(h2_settings_header_table_size);
825 if (!h2c->ddht)
826 goto fail;
827
828 /* Initialise the context. */
829 h2c->st0 = H2_CS_PREFACE;
830 h2c->conn = conn;
Willy Tarreau2e2083a2019-01-31 10:34:07 +0100831 h2c->streams_limit = h2_settings_max_concurrent_streams;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200832 h2c->max_id = -1;
833 h2c->errcode = H2_ERR_NO_ERROR;
Willy Tarreau97aaa672018-12-23 09:49:04 +0100834 h2c->rcvd_c = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200835 h2c->rcvd_s = 0;
Willy Tarreau49745612017-12-03 18:56:02 +0100836 h2c->nb_streams = 0;
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200837 h2c->nb_cs = 0;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100838 h2c->nb_reserved = 0;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100839 h2c->stream_cnt = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200840
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200841 h2c->dbuf = *input;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200842 h2c->dsi = -1;
843 h2c->msi = -1;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100844
Willy Tarreau32218eb2017-09-22 08:07:25 +0200845 h2c->last_sid = -1;
846
Willy Tarreau51330962019-05-26 09:38:07 +0200847 br_init(h2c->mbuf, sizeof(h2c->mbuf) / sizeof(h2c->mbuf[0]));
Willy Tarreau32218eb2017-09-22 08:07:25 +0200848 h2c->miw = 65535; /* mux initial window size */
849 h2c->mws = 65535; /* mux window size */
850 h2c->mfs = 16384; /* initial max frame size */
Willy Tarreau751f2d02018-10-05 09:35:00 +0200851 h2c->streams_by_id = EB_ROOT;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200852 LIST_INIT(&h2c->send_list);
853 LIST_INIT(&h2c->fctl_list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200854 LIST_INIT(&h2c->blocked_list);
Olivier Houchardd846c262018-10-19 17:24:29 +0200855 LIST_INIT(&h2c->sending_list);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100856 LIST_INIT(&h2c->buf_wait.list);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200857
Christopher Fauletf81ef032019-10-04 15:19:43 +0200858 conn->ctx = h2c;
859
Willy Tarreau3f133572017-10-31 19:21:06 +0100860 if (t)
861 task_queue(t);
Willy Tarreauea392822017-10-31 10:02:25 +0100862
Willy Tarreau01b44822018-10-03 14:26:37 +0200863 if (h2c->flags & H2_CF_IS_BACK) {
864 /* FIXME: this is temporary, for outgoing connections we need
865 * to immediately allocate a stream until the code is modified
866 * so that the caller calls ->attach(). For now the outgoing cs
Christopher Fauletf81ef032019-10-04 15:19:43 +0200867 * is stored as conn->ctx by the caller and saved in conn_ctx.
Willy Tarreau01b44822018-10-03 14:26:37 +0200868 */
869 struct h2s *h2s;
870
Christopher Fauletf81ef032019-10-04 15:19:43 +0200871 h2s = h2c_bck_stream_new(h2c, conn_ctx, sess);
Willy Tarreau01b44822018-10-03 14:26:37 +0200872 if (!h2s)
873 goto fail_stream;
874 }
875
Willy Tarreau0f383582018-10-03 14:22:21 +0200876 /* prepare to read something */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200877 h2c_restart_reading(h2c, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +0200878 TRACE_LEAVE(H2_EV_H2C_NEW, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200879 return 0;
Willy Tarreau01b44822018-10-03 14:26:37 +0200880 fail_stream:
881 hpack_dht_free(h2c->ddht);
mildiscd2d7de2018-10-02 16:44:18 +0200882 fail:
Willy Tarreauf6562792019-05-07 19:05:35 +0200883 task_destroy(t);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200884 if (h2c->wait_event.tasklet)
885 tasklet_free(h2c->wait_event.tasklet);
Willy Tarreaubafbe012017-11-24 17:34:44 +0100886 pool_free(pool_head_h2c, h2c);
mildiscd2d7de2018-10-02 16:44:18 +0200887 fail_no_h2c:
Christopher Fauletf81ef032019-10-04 15:19:43 +0200888 conn->ctx = conn_ctx; /* restore saved ctx */
889 TRACE_DEVEL("leaving in error", H2_EV_H2C_NEW|H2_EV_H2C_END|H2_EV_H2C_ERR);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200890 return -1;
891}
892
Willy Tarreau751f2d02018-10-05 09:35:00 +0200893/* returns the next allocatable outgoing stream ID for the H2 connection, or
894 * -1 if no more is allocatable.
895 */
896static inline int32_t h2c_get_next_sid(const struct h2c *h2c)
897{
898 int32_t id = (h2c->max_id + 1) | 1;
Willy Tarreaua80dca82019-01-24 17:08:28 +0100899
900 if ((id & 0x80000000U) || (h2c->last_sid >= 0 && id > h2c->last_sid))
Willy Tarreau751f2d02018-10-05 09:35:00 +0200901 id = -1;
902 return id;
903}
904
Willy Tarreau2373acc2017-10-12 17:35:14 +0200905/* returns the stream associated with id <id> or NULL if not found */
906static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id)
907{
908 struct eb32_node *node;
909
Willy Tarreau751f2d02018-10-05 09:35:00 +0200910 if (id == 0)
911 return (struct h2s *)h2_closed_stream;
912
Willy Tarreau2a856182017-05-16 15:20:39 +0200913 if (id > h2c->max_id)
914 return (struct h2s *)h2_idle_stream;
915
Willy Tarreau2373acc2017-10-12 17:35:14 +0200916 node = eb32_lookup(&h2c->streams_by_id, id);
917 if (!node)
Willy Tarreau2a856182017-05-16 15:20:39 +0200918 return (struct h2s *)h2_closed_stream;
Willy Tarreau2373acc2017-10-12 17:35:14 +0200919
920 return container_of(node, struct h2s, by_id);
921}
922
Christopher Faulet73c12072019-04-08 11:23:22 +0200923/* release function. This one should be called to free all resources allocated
924 * to the mux.
Willy Tarreau62f52692017-10-08 23:01:42 +0200925 */
Christopher Faulet73c12072019-04-08 11:23:22 +0200926static void h2_release(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +0200927{
Christopher Faulet61840e72019-04-15 09:33:32 +0200928 struct connection *conn = NULL;;
Christopher Faulet39a96ee2019-04-08 10:52:21 +0200929
Willy Tarreau7838a792019-08-12 18:42:03 +0200930 TRACE_ENTER(H2_EV_H2C_END);
931
Willy Tarreau32218eb2017-09-22 08:07:25 +0200932 if (h2c) {
Christopher Faulet61840e72019-04-15 09:33:32 +0200933 /* The connection must be aattached to this mux to be released */
934 if (h2c->conn && h2c->conn->ctx == h2c)
935 conn = h2c->conn;
936
Willy Tarreau7838a792019-08-12 18:42:03 +0200937 TRACE_DEVEL("freeing h2c", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200938 hpack_dht_free(h2c->ddht);
Willy Tarreau14398122017-09-22 14:26:04 +0200939
Willy Tarreau186e96e2019-05-28 17:21:18 +0200940 if (LIST_ADDED(&h2c->buf_wait.list)) {
941 HA_SPIN_LOCK(BUF_WQ_LOCK, &buffer_wq_lock);
942 LIST_DEL(&h2c->buf_wait.list);
943 HA_SPIN_UNLOCK(BUF_WQ_LOCK, &buffer_wq_lock);
944 }
Willy Tarreau14398122017-09-22 14:26:04 +0200945
Willy Tarreau44e973f2018-03-01 17:49:30 +0100946 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200947 h2_release_mbuf(h2c);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100948
Willy Tarreauea392822017-10-31 10:02:25 +0100949 if (h2c->task) {
Willy Tarreau0975f112018-03-29 15:22:59 +0200950 h2c->task->context = NULL;
951 task_wakeup(h2c->task, TASK_WOKEN_OTHER);
Willy Tarreauea392822017-10-31 10:02:25 +0100952 h2c->task = NULL;
953 }
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200954 if (h2c->wait_event.tasklet)
955 tasklet_free(h2c->wait_event.tasklet);
Christopher Faulet21d849f2019-09-18 11:07:20 +0200956 if (conn && h2c->wait_event.events != 0)
Olivier Houcharde179d0e2019-03-21 18:27:17 +0100957 conn->xprt->unsubscribe(conn, conn->xprt_ctx, h2c->wait_event.events,
Christopher Faulet21d849f2019-09-18 11:07:20 +0200958 &h2c->wait_event);
Willy Tarreauea392822017-10-31 10:02:25 +0100959
Willy Tarreaubafbe012017-11-24 17:34:44 +0100960 pool_free(pool_head_h2c, h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200961 }
962
Christopher Faulet39a96ee2019-04-08 10:52:21 +0200963 if (conn) {
964 conn->mux = NULL;
965 conn->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +0200966 TRACE_DEVEL("freeing conn", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200967
Christopher Faulet39a96ee2019-04-08 10:52:21 +0200968 conn_stop_tracking(conn);
969 conn_full_close(conn);
970 if (conn->destroy_cb)
971 conn->destroy_cb(conn);
972 conn_free(conn);
973 }
Willy Tarreau7838a792019-08-12 18:42:03 +0200974
975 TRACE_LEAVE(H2_EV_H2C_END);
Willy Tarreau62f52692017-10-08 23:01:42 +0200976}
977
978
Willy Tarreau71681172017-10-23 14:39:06 +0200979/******************************************************/
980/* functions below are for the H2 protocol processing */
981/******************************************************/
982
983/* returns the stream if of stream <h2s> or 0 if <h2s> is NULL */
Willy Tarreau1f094672017-11-20 21:27:45 +0100984static inline __maybe_unused int h2s_id(const struct h2s *h2s)
Willy Tarreau71681172017-10-23 14:39:06 +0200985{
986 return h2s ? h2s->id : 0;
987}
988
Willy Tarreau1d4a0f82019-08-02 07:52:08 +0200989/* returns the sum of the stream's own window size and the mux's initial
990 * window, which together form the stream's effective window size.
991 */
992static inline int h2s_mws(const struct h2s *h2s)
993{
994 return h2s->sws + h2s->h2c->miw;
995}
996
Willy Tarreau5b5e6872017-09-25 16:17:25 +0200997/* returns true of the mux is currently busy as seen from stream <h2s> */
Willy Tarreau1f094672017-11-20 21:27:45 +0100998static inline __maybe_unused int h2c_mux_busy(const struct h2c *h2c, const struct h2s *h2s)
Willy Tarreau5b5e6872017-09-25 16:17:25 +0200999{
1000 if (h2c->msi < 0)
1001 return 0;
1002
1003 if (h2c->msi == h2s_id(h2s))
1004 return 0;
1005
1006 return 1;
1007}
1008
Willy Tarreau741d6df2017-10-17 08:00:59 +02001009/* marks an error on the connection */
Willy Tarreau1f094672017-11-20 21:27:45 +01001010static inline __maybe_unused void h2c_error(struct h2c *h2c, enum h2_err err)
Willy Tarreau741d6df2017-10-17 08:00:59 +02001011{
Willy Tarreau7838a792019-08-12 18:42:03 +02001012 TRACE_POINT(H2_EV_H2C_ERR, h2c->conn,,, (void *)(long)(err));
Willy Tarreau741d6df2017-10-17 08:00:59 +02001013 h2c->errcode = err;
1014 h2c->st0 = H2_CS_ERROR;
1015}
1016
Willy Tarreau175cebb2019-01-24 10:02:24 +01001017/* marks an error on the stream. It may also update an already closed stream
1018 * (e.g. to report an error after an RST was received).
1019 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001020static inline __maybe_unused void h2s_error(struct h2s *h2s, enum h2_err err)
Willy Tarreau2e43f082017-10-17 08:03:59 +02001021{
Willy Tarreau175cebb2019-01-24 10:02:24 +01001022 if (h2s->id && h2s->st != H2_SS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001023 TRACE_POINT(H2_EV_H2S_ERR, h2s->h2c->conn, h2s,, (void *)(long)(err));
Willy Tarreau2e43f082017-10-17 08:03:59 +02001024 h2s->errcode = err;
Willy Tarreau175cebb2019-01-24 10:02:24 +01001025 if (h2s->st < H2_SS_ERROR)
1026 h2s->st = H2_SS_ERROR;
Willy Tarreauec988c72018-12-19 18:00:29 +01001027 if (h2s->cs)
1028 cs_set_error(h2s->cs);
Willy Tarreau2e43f082017-10-17 08:03:59 +02001029 }
1030}
1031
Willy Tarreau7e094452018-12-19 18:08:52 +01001032/* attempt to notify the data layer of recv availability */
1033static void __maybe_unused h2s_notify_recv(struct h2s *h2s)
1034{
1035 struct wait_event *sw;
1036
1037 if (h2s->recv_wait) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001038 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau7e094452018-12-19 18:08:52 +01001039 sw = h2s->recv_wait;
1040 sw->events &= ~SUB_RETRY_RECV;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001041 tasklet_wakeup(sw->tasklet);
Willy Tarreau7e094452018-12-19 18:08:52 +01001042 h2s->recv_wait = NULL;
1043 }
1044}
1045
1046/* attempt to notify the data layer of send availability */
1047static void __maybe_unused h2s_notify_send(struct h2s *h2s)
1048{
1049 struct wait_event *sw;
1050
Willy Tarreauc234ae32019-05-13 17:56:11 +02001051 if (h2s->send_wait && !LIST_ADDED(&h2s->sending_list)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001052 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau7e094452018-12-19 18:08:52 +01001053 sw = h2s->send_wait;
1054 sw->events &= ~SUB_RETRY_SEND;
Olivier Houchardfd1e96d2019-03-25 14:04:25 +01001055 LIST_ADDQ(&h2s->h2c->sending_list, &h2s->sending_list);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001056 tasklet_wakeup(sw->tasklet);
Willy Tarreau7e094452018-12-19 18:08:52 +01001057 }
1058}
1059
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001060/* alerts the data layer, trying to wake it up by all means, following
1061 * this sequence :
1062 * - if the h2s' data layer is subscribed to recv, then it's woken up for recv
1063 * - if its subscribed to send, then it's woken up for send
1064 * - if it was subscribed to neither, its ->wake() callback is called
1065 * It is safe to call this function with a closed stream which doesn't have a
1066 * conn_stream anymore.
1067 */
1068static void __maybe_unused h2s_alert(struct h2s *h2s)
1069{
Willy Tarreau7838a792019-08-12 18:42:03 +02001070 TRACE_ENTER(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
1071
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001072 if (h2s->recv_wait || h2s->send_wait) {
1073 h2s_notify_recv(h2s);
1074 h2s_notify_send(h2s);
1075 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001076 else if (h2s->cs && h2s->cs->data_cb->wake != NULL) {
1077 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001078 h2s->cs->data_cb->wake(h2s->cs);
Willy Tarreau7838a792019-08-12 18:42:03 +02001079 }
1080
1081 TRACE_LEAVE(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001082}
1083
Willy Tarreaue4820742017-07-27 13:37:23 +02001084/* writes the 24-bit frame size <len> at address <frame> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001085static inline __maybe_unused void h2_set_frame_size(void *frame, uint32_t len)
Willy Tarreaue4820742017-07-27 13:37:23 +02001086{
1087 uint8_t *out = frame;
1088
1089 *out = len >> 16;
1090 write_n16(out + 1, len);
1091}
1092
Willy Tarreau54c15062017-10-10 17:10:03 +02001093/* reads <bytes> bytes from buffer <b> starting at relative offset <o> from the
1094 * current pointer, dealing with wrapping, and stores the result in <dst>. It's
1095 * the caller's responsibility to verify that there are at least <bytes> bytes
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001096 * available in the buffer's input prior to calling this function. The buffer
1097 * is assumed not to hold any output data.
Willy Tarreau54c15062017-10-10 17:10:03 +02001098 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001099static inline __maybe_unused void h2_get_buf_bytes(void *dst, size_t bytes,
Willy Tarreau54c15062017-10-10 17:10:03 +02001100 const struct buffer *b, int o)
1101{
Willy Tarreau591d4452018-06-15 17:21:00 +02001102 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 +02001103}
1104
Willy Tarreau1f094672017-11-20 21:27:45 +01001105static inline __maybe_unused uint16_t h2_get_n16(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001106{
Willy Tarreau591d4452018-06-15 17:21:00 +02001107 return readv_n16(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001108}
1109
Willy Tarreau1f094672017-11-20 21:27:45 +01001110static inline __maybe_unused uint32_t h2_get_n32(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001111{
Willy Tarreau591d4452018-06-15 17:21:00 +02001112 return readv_n32(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001113}
1114
Willy Tarreau1f094672017-11-20 21:27:45 +01001115static inline __maybe_unused uint64_t h2_get_n64(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001116{
Willy Tarreau591d4452018-06-15 17:21:00 +02001117 return readv_n64(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001118}
1119
1120
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001121/* Peeks an H2 frame header from offset <o> of buffer <b> into descriptor <h>.
1122 * The algorithm is not obvious. It turns out that H2 headers are neither
1123 * aligned nor do they use regular sizes. And to add to the trouble, the buffer
1124 * may wrap so each byte read must be checked. The header is formed like this :
Willy Tarreau715d5312017-07-11 15:20:24 +02001125 *
1126 * b0 b1 b2 b3 b4 b5..b8
1127 * +----------+---------+--------+----+----+----------------------+
1128 * |len[23:16]|len[15:8]|len[7:0]|type|flag|sid[31:0] (big endian)|
1129 * +----------+---------+--------+----+----+----------------------+
1130 *
1131 * Here we read a big-endian 64 bit word from h[1]. This way in a single read
1132 * we get the sid properly aligned and ordered, and 16 bits of len properly
1133 * ordered as well. The type and flags can be extracted using bit shifts from
1134 * the word, and only one extra read is needed to fetch len[16:23].
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001135 * Returns zero if some bytes are missing, otherwise non-zero on success. The
1136 * buffer is assumed not to contain any output data.
Willy Tarreau715d5312017-07-11 15:20:24 +02001137 */
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001138static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, int o, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001139{
1140 uint64_t w;
1141
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001142 if (b_data(b) < o + 9)
Willy Tarreau715d5312017-07-11 15:20:24 +02001143 return 0;
1144
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001145 w = h2_get_n64(b, o + 1);
1146 h->len = *(uint8_t*)b_peek(b, o) << 16;
Willy Tarreau715d5312017-07-11 15:20:24 +02001147 h->sid = w & 0x7FFFFFFF; /* RFC7540#4.1: R bit must be ignored */
1148 h->ff = w >> 32;
1149 h->ft = w >> 40;
1150 h->len += w >> 48;
1151 return 1;
1152}
1153
1154/* skip the next 9 bytes corresponding to the frame header possibly parsed by
1155 * h2_peek_frame_hdr() above.
1156 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001157static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b)
Willy Tarreau715d5312017-07-11 15:20:24 +02001158{
Willy Tarreaue5f12ce2018-06-15 10:28:05 +02001159 b_del(b, 9);
Willy Tarreau715d5312017-07-11 15:20:24 +02001160}
1161
1162/* same as above, automatically advances the buffer on success */
Willy Tarreau1f094672017-11-20 21:27:45 +01001163static inline __maybe_unused int h2_get_frame_hdr(struct buffer *b, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001164{
1165 int ret;
1166
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001167 ret = h2_peek_frame_hdr(b, 0, h);
Willy Tarreau715d5312017-07-11 15:20:24 +02001168 if (ret > 0)
1169 h2_skip_frame_hdr(b);
1170 return ret;
1171}
1172
Willy Tarreaucb985a42019-10-07 16:56:34 +02001173
1174/* try to fragment the headers frame present at the beginning of buffer <b>,
1175 * enforcing a limit of <mfs> bytes per frame. Returns 0 on failure, 1 on
1176 * success. Typical causes of failure include a buffer not large enough to
1177 * add extra frame headers. The existing frame size is read in the current
1178 * frame. Its EH flag will be cleared if CONTINUATION frames need to be added,
1179 * and its length will be adjusted. The stream ID for continuation frames will
1180 * be copied from the initial frame's.
1181 */
1182static int h2_fragment_headers(struct buffer *b, uint32_t mfs)
1183{
1184 size_t remain = b->data - 9;
1185 int extra_frames = (remain - 1) / mfs;
1186 size_t fsize;
1187 char *fptr;
1188 int frame;
1189
1190 if (b->data <= mfs + 9)
1191 return 1;
1192
1193 /* Too large a frame, we need to fragment it using CONTINUATION
1194 * frames. We start from the end and move tails as needed.
1195 */
1196 if (b->data + extra_frames * 9 > b->size)
1197 return 0;
1198
1199 for (frame = extra_frames; frame; frame--) {
1200 fsize = ((remain - 1) % mfs) + 1;
1201 remain -= fsize;
1202
1203 /* move data */
1204 fptr = b->area + 9 + remain + (frame - 1) * 9;
1205 memmove(fptr + 9, b->area + 9 + remain, fsize);
1206 b->data += 9;
1207
1208 /* write new frame header */
1209 h2_set_frame_size(fptr, fsize);
1210 fptr[3] = H2_FT_CONTINUATION;
1211 fptr[4] = (frame == extra_frames) ? H2_F_HEADERS_END_HEADERS : 0;
1212 write_n32(fptr + 5, read_n32(b->area + 5));
1213 }
1214
1215 b->area[4] &= ~H2_F_HEADERS_END_HEADERS;
1216 h2_set_frame_size(b->area, remain);
1217 return 1;
1218}
1219
1220
Willy Tarreau00dd0782018-03-01 16:31:34 +01001221/* marks stream <h2s> as CLOSED and decrement the number of active streams for
1222 * its connection if the stream was not yet closed. Please use this exclusively
1223 * before closing a stream to ensure stream count is well maintained.
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001224 */
Willy Tarreau00dd0782018-03-01 16:31:34 +01001225static inline void h2s_close(struct h2s *h2s)
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001226{
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001227 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001228 TRACE_ENTER(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001229 h2s->h2c->nb_streams--;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001230 if (!h2s->id)
1231 h2s->h2c->nb_reserved--;
Willy Tarreaua27db382019-03-25 18:13:16 +01001232 if (h2s->cs) {
Willy Tarreaua27db382019-03-25 18:13:16 +01001233 if (!(h2s->cs->flags & CS_FL_EOS) && !b_data(&h2s->rxbuf))
1234 h2s_notify_recv(h2s);
1235 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001236 TRACE_LEAVE(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001237 }
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001238 h2s->st = H2_SS_CLOSED;
1239}
1240
Willy Tarreau71049cc2018-03-28 13:56:39 +02001241/* detaches an H2 stream from its H2C and releases it to the H2S pool. */
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001242/* h2s_destroy should only ever be called by the thread that owns the stream,
1243 * that means that a tasklet should be used if we want to destroy the h2s
1244 * from another thread
1245 */
Willy Tarreau71049cc2018-03-28 13:56:39 +02001246static void h2s_destroy(struct h2s *h2s)
Willy Tarreau0a10de62018-03-01 16:27:53 +01001247{
Willy Tarreau7838a792019-08-12 18:42:03 +02001248 struct connection *conn = h2s->h2c->conn;
1249
1250 TRACE_ENTER(H2_EV_H2S_END, conn, h2s);
1251
Willy Tarreau0a10de62018-03-01 16:27:53 +01001252 h2s_close(h2s);
1253 eb32_delete(&h2s->by_id);
Olivier Houchard638b7992018-08-16 15:41:52 +02001254 if (b_size(&h2s->rxbuf)) {
1255 b_free(&h2s->rxbuf);
1256 offer_buffers(NULL, tasks_run_queue);
1257 }
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001258 if (h2s->send_wait != NULL)
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001259 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001260 if (h2s->recv_wait != NULL)
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001261 h2s->recv_wait->events &= ~SUB_RETRY_RECV;
Joseph Herlantd77575d2018-11-25 10:54:45 -08001262 /* There's no need to explicitly call unsubscribe here, the only
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001263 * reference left would be in the h2c send_list/fctl_list, and if
1264 * we're in it, we're getting out anyway
1265 */
Olivier Houchardd360ac62019-03-22 17:37:16 +01001266 LIST_DEL_INIT(&h2s->list);
Willy Tarreauc234ae32019-05-13 17:56:11 +02001267 if (LIST_ADDED(&h2s->sending_list)) {
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001268 /* It should be OK to call tasklet_remove_from_tasklet_list()
1269 * here, as only the thread responsible for the tasklet should
1270 * be called here.
1271 */
Willy Tarreau86eded62019-06-14 14:47:49 +02001272 tasklet_remove_from_tasklet_list(h2s->send_wait->tasklet);
Olivier Houchard998410a2019-04-15 19:23:37 +02001273 LIST_DEL_INIT(&h2s->sending_list);
1274 }
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001275 /* ditto, calling tasklet_free() here should be ok */
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001276 tasklet_free(h2s->wait_event.tasklet);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001277 pool_free(pool_head_h2s, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001278
1279 TRACE_LEAVE(H2_EV_H2S_END, conn);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001280}
1281
Willy Tarreaua8e49542018-10-03 18:53:55 +02001282/* allocates a new stream <id> for connection <h2c> and adds it into h2c's
1283 * stream tree. In case of error, nothing is added and NULL is returned. The
1284 * causes of errors can be any failed memory allocation. The caller is
1285 * responsible for checking if the connection may support an extra stream
1286 * prior to calling this function.
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001287 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02001288static struct h2s *h2s_new(struct h2c *h2c, int id)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001289{
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001290 struct h2s *h2s;
1291
Willy Tarreau7838a792019-08-12 18:42:03 +02001292 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1293
Willy Tarreaubafbe012017-11-24 17:34:44 +01001294 h2s = pool_alloc(pool_head_h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001295 if (!h2s)
1296 goto out;
1297
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001298 h2s->wait_event.tasklet = tasklet_new();
1299 if (!h2s->wait_event.tasklet) {
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001300 pool_free(pool_head_h2s, h2s);
1301 goto out;
1302 }
1303 h2s->send_wait = NULL;
1304 h2s->recv_wait = NULL;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001305 h2s->wait_event.tasklet->process = h2_deferred_shut;
1306 h2s->wait_event.tasklet->context = h2s;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001307 h2s->wait_event.events = 0;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001308 LIST_INIT(&h2s->list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01001309 LIST_INIT(&h2s->sending_list);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001310 h2s->h2c = h2c;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001311 h2s->cs = NULL;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001312 h2s->sws = 0;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001313 h2s->flags = H2_SF_NONE;
1314 h2s->errcode = H2_ERR_NO_ERROR;
1315 h2s->st = H2_SS_IDLE;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02001316 h2s->status = 0;
Willy Tarreau1915ca22019-01-24 11:49:37 +01001317 h2s->body_len = 0;
Olivier Houchard638b7992018-08-16 15:41:52 +02001318 h2s->rxbuf = BUF_NULL;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001319
1320 if (h2c->flags & H2_CF_IS_BACK) {
1321 h1m_init_req(&h2s->h1m);
1322 h2s->h1m.err_pos = -1; // don't care about errors on the request path
1323 h2s->h1m.flags |= H1_MF_TOLOWER;
1324 } else {
1325 h1m_init_res(&h2s->h1m);
1326 h2s->h1m.err_pos = -1; // don't care about errors on the response path
1327 h2s->h1m.flags |= H1_MF_TOLOWER;
1328 }
1329
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001330 h2s->by_id.key = h2s->id = id;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001331 if (id > 0)
1332 h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001333 else
1334 h2c->nb_reserved++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001335
1336 eb32_insert(&h2c->streams_by_id, &h2s->by_id);
Willy Tarreau49745612017-12-03 18:56:02 +01001337 h2c->nb_streams++;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001338 h2c->stream_cnt++;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001339
Willy Tarreau7838a792019-08-12 18:42:03 +02001340 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001341 return h2s;
1342
1343 out_free_h2s:
1344 pool_free(pool_head_h2s, h2s);
1345 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001346 TRACE_DEVEL("leaving in error", H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001347 return NULL;
1348}
1349
1350/* creates a new stream <id> on the h2c connection and returns it, or NULL in
1351 * case of memory allocation error.
1352 */
1353static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id)
1354{
1355 struct session *sess = h2c->conn->owner;
1356 struct conn_stream *cs;
1357 struct h2s *h2s;
1358
Willy Tarreau7838a792019-08-12 18:42:03 +02001359 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1360
Willy Tarreaua8e49542018-10-03 18:53:55 +02001361 if (h2c->nb_streams >= h2_settings_max_concurrent_streams)
1362 goto out;
1363
1364 h2s = h2s_new(h2c, id);
1365 if (!h2s)
1366 goto out;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001367
1368 cs = cs_new(h2c->conn);
1369 if (!cs)
1370 goto out_close;
1371
Olivier Houchard746fb772018-12-15 19:42:00 +01001372 cs->flags |= CS_FL_NOT_FIRST;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001373 h2s->cs = cs;
1374 cs->ctx = h2s;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001375 h2c->nb_cs++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001376
1377 if (stream_create_from_cs(cs) < 0)
1378 goto out_free_cs;
1379
Willy Tarreau590a0512018-09-05 11:56:48 +02001380 /* We want the accept date presented to the next stream to be the one
1381 * we have now, the handshake time to be null (since the next stream
1382 * is not delayed by a handshake), and the idle time to count since
1383 * right now.
1384 */
1385 sess->accept_date = date;
1386 sess->tv_accept = now;
1387 sess->t_handshake = 0;
1388
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001389 /* OK done, the stream lives its own life now */
Willy Tarreaufa1d3572019-01-31 10:31:51 +01001390 if (h2_frt_has_too_many_cs(h2c))
Willy Tarreauf2101912018-07-19 10:11:38 +02001391 h2c->flags |= H2_CF_DEM_TOOMANY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001392 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001393 return h2s;
1394
1395 out_free_cs:
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001396 h2c->nb_cs--;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001397 cs_free(cs);
Olivier Houchard58d87f32019-05-29 16:44:17 +02001398 h2s->cs = NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001399 out_close:
Willy Tarreau71049cc2018-03-28 13:56:39 +02001400 h2s_destroy(h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001401 out:
Willy Tarreau45efc072018-10-03 18:27:52 +02001402 sess_log(sess);
Willy Tarreau7838a792019-08-12 18:42:03 +02001403 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreau45efc072018-10-03 18:27:52 +02001404 return NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001405}
1406
Willy Tarreau751f2d02018-10-05 09:35:00 +02001407/* allocates a new stream associated to conn_stream <cs> on the h2c connection
1408 * and returns it, or NULL in case of memory allocation error or if the highest
1409 * possible stream ID was reached.
1410 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01001411static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001412{
1413 struct h2s *h2s = NULL;
1414
Willy Tarreau7838a792019-08-12 18:42:03 +02001415 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1416
Willy Tarreau86949782019-01-31 10:42:05 +01001417 if (h2c->nb_streams >= h2c->streams_limit)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001418 goto out;
1419
Willy Tarreaua80dca82019-01-24 17:08:28 +01001420 if (h2_streams_left(h2c) < 1)
1421 goto out;
1422
Willy Tarreau751f2d02018-10-05 09:35:00 +02001423 /* Defer choosing the ID until we send the first message to create the stream */
1424 h2s = h2s_new(h2c, 0);
1425 if (!h2s)
1426 goto out;
1427
1428 h2s->cs = cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001429 h2s->sess = sess;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001430 cs->ctx = h2s;
1431 h2c->nb_cs++;
1432
Willy Tarreau751f2d02018-10-05 09:35:00 +02001433 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001434 if (likely(h2s))
1435 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
1436 else
1437 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn, h2s);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001438 return h2s;
1439}
1440
Willy Tarreaube5b7152017-09-25 16:25:39 +02001441/* try to send a settings frame on the connection. Returns > 0 on success, 0 if
1442 * it couldn't do anything. It may return an error in h2c. See RFC7540#11.3 for
1443 * the various settings codes.
1444 */
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001445static int h2c_send_settings(struct h2c *h2c)
Willy Tarreaube5b7152017-09-25 16:25:39 +02001446{
1447 struct buffer *res;
1448 char buf_data[100]; // enough for 15 settings
Willy Tarreau83061a82018-07-13 11:56:34 +02001449 struct buffer buf;
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001450 int mfs;
Willy Tarreau7838a792019-08-12 18:42:03 +02001451 int ret = 0;
1452
1453 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001454
1455 if (h2c_mux_busy(h2c, NULL)) {
1456 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001457 goto out;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001458 }
1459
Willy Tarreaube5b7152017-09-25 16:25:39 +02001460 chunk_init(&buf, buf_data, sizeof(buf_data));
1461 chunk_memcpy(&buf,
1462 "\x00\x00\x00" /* length : 0 for now */
1463 "\x04\x00" /* type : 4 (settings), flags : 0 */
1464 "\x00\x00\x00\x00", /* stream ID : 0 */
1465 9);
1466
Willy Tarreau0bbad6b2019-02-26 16:01:52 +01001467 if (h2c->flags & H2_CF_IS_BACK) {
1468 /* send settings_enable_push=0 */
1469 chunk_memcat(&buf, "\x00\x02\x00\x00\x00\x00", 6);
1470 }
1471
Willy Tarreaube5b7152017-09-25 16:25:39 +02001472 if (h2_settings_header_table_size != 4096) {
1473 char str[6] = "\x00\x01"; /* header_table_size */
1474
1475 write_n32(str + 2, h2_settings_header_table_size);
1476 chunk_memcat(&buf, str, 6);
1477 }
1478
1479 if (h2_settings_initial_window_size != 65535) {
1480 char str[6] = "\x00\x04"; /* initial_window_size */
1481
1482 write_n32(str + 2, h2_settings_initial_window_size);
1483 chunk_memcat(&buf, str, 6);
1484 }
1485
1486 if (h2_settings_max_concurrent_streams != 0) {
1487 char str[6] = "\x00\x03"; /* max_concurrent_streams */
1488
1489 /* Note: 0 means "unlimited" for haproxy's config but not for
1490 * the protocol, so never send this value!
1491 */
1492 write_n32(str + 2, h2_settings_max_concurrent_streams);
1493 chunk_memcat(&buf, str, 6);
1494 }
1495
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001496 mfs = h2_settings_max_frame_size;
1497 if (mfs > global.tune.bufsize)
1498 mfs = global.tune.bufsize;
1499
1500 if (!mfs)
1501 mfs = global.tune.bufsize;
1502
1503 if (mfs != 16384) {
Willy Tarreaube5b7152017-09-25 16:25:39 +02001504 char str[6] = "\x00\x05"; /* max_frame_size */
1505
1506 /* note: similarly we could also emit MAX_HEADER_LIST_SIZE to
1507 * match bufsize - rewrite size, but at the moment it seems
1508 * that clients don't take care of it.
1509 */
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001510 write_n32(str + 2, mfs);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001511 chunk_memcat(&buf, str, 6);
1512 }
1513
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001514 h2_set_frame_size(buf.area, buf.data - 9);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001515
1516 res = br_tail(h2c->mbuf);
1517 retry:
1518 if (!h2_get_buf(h2c, res)) {
1519 h2c->flags |= H2_CF_MUX_MALLOC;
1520 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001521 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001522 }
1523
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001524 ret = b_istput(res, ist2(buf.area, buf.data));
Willy Tarreaube5b7152017-09-25 16:25:39 +02001525 if (unlikely(ret <= 0)) {
1526 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001527 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1528 goto retry;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001529 h2c->flags |= H2_CF_MUX_MFULL;
1530 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001531 }
1532 else {
1533 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001534 ret = 0;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001535 }
1536 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001537 out:
1538 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001539 return ret;
1540}
1541
Willy Tarreau52eed752017-09-22 15:05:09 +02001542/* Try to receive a connection preface, then upon success try to send our
1543 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1544 * missing data. It may return an error in h2c.
1545 */
1546static int h2c_frt_recv_preface(struct h2c *h2c)
1547{
1548 int ret1;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001549 int ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001550
Willy Tarreau7838a792019-08-12 18:42:03 +02001551 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
1552
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001553 ret1 = b_isteq(&h2c->dbuf, 0, b_data(&h2c->dbuf), ist(H2_CONN_PREFACE));
Willy Tarreau52eed752017-09-22 15:05:09 +02001554
1555 if (unlikely(ret1 <= 0)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02001556 if (ret1 < 0)
1557 sess_log(h2c->conn->owner);
1558
Willy Tarreau52eed752017-09-22 15:05:09 +02001559 if (ret1 < 0 || conn_xprt_read0_pending(h2c->conn))
1560 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001561 ret2 = 0;
1562 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02001563 }
1564
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001565 ret2 = h2c_send_settings(h2c);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001566 if (ret2 > 0)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001567 b_del(&h2c->dbuf, ret1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001568 out:
1569 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001570 return ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001571}
1572
Willy Tarreau01b44822018-10-03 14:26:37 +02001573/* Try to send a connection preface, then upon success try to send our
1574 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1575 * missing data. It may return an error in h2c.
1576 */
1577static int h2c_bck_send_preface(struct h2c *h2c)
1578{
1579 struct buffer *res;
Willy Tarreau7838a792019-08-12 18:42:03 +02001580 int ret = 0;
1581
1582 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02001583
1584 if (h2c_mux_busy(h2c, NULL)) {
1585 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001586 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001587 }
1588
Willy Tarreaubcc45952019-05-26 10:05:50 +02001589 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001590 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001591 if (!h2_get_buf(h2c, res)) {
Willy Tarreau01b44822018-10-03 14:26:37 +02001592 h2c->flags |= H2_CF_MUX_MALLOC;
1593 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001594 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001595 }
1596
1597 if (!b_data(res)) {
1598 /* preface not yet sent */
Willy Tarreau9c218e72019-05-26 10:08:28 +02001599 ret = b_istput(res, ist(H2_CONN_PREFACE));
1600 if (unlikely(ret <= 0)) {
1601 if (!ret) {
1602 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1603 goto retry;
1604 h2c->flags |= H2_CF_MUX_MFULL;
1605 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001606 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001607 }
1608 else {
1609 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001610 ret = 0;
1611 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001612 }
1613 }
Willy Tarreau01b44822018-10-03 14:26:37 +02001614 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001615 ret = h2c_send_settings(h2c);
1616 out:
1617 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
1618 return ret;
Willy Tarreau01b44822018-10-03 14:26:37 +02001619}
1620
Willy Tarreau081d4722017-05-16 21:51:05 +02001621/* try to send a GOAWAY frame on the connection to report an error or a graceful
1622 * shutdown, with h2c->errcode as the error code. Returns > 0 on success or zero
1623 * if nothing was done. It uses h2c->last_sid as the advertised ID, or copies it
1624 * from h2c->max_id if it's not set yet (<0). In case of lack of room to write
1625 * the message, it subscribes the requester (either <h2s> or <h2c>) to future
1626 * notifications. It sets H2_CF_GOAWAY_SENT on success, and H2_CF_GOAWAY_FAILED
1627 * on unrecoverable failure. It will not attempt to send one again in this last
1628 * case so that it is safe to use h2c_error() to report such errors.
1629 */
1630static int h2c_send_goaway_error(struct h2c *h2c, struct h2s *h2s)
1631{
1632 struct buffer *res;
1633 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02001634 int ret = 0;
Willy Tarreau081d4722017-05-16 21:51:05 +02001635
Willy Tarreau7838a792019-08-12 18:42:03 +02001636 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
1637
1638 if (h2c->flags & H2_CF_GOAWAY_FAILED) {
1639 ret = 1; // claim that it worked
1640 goto out;
1641 }
Willy Tarreau081d4722017-05-16 21:51:05 +02001642
1643 if (h2c_mux_busy(h2c, h2s)) {
1644 if (h2s)
1645 h2s->flags |= H2_SF_BLK_MBUSY;
1646 else
1647 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001648 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001649 }
1650
Willy Tarreau9c218e72019-05-26 10:08:28 +02001651 /* len: 8, type: 7, flags: none, sid: 0 */
1652 memcpy(str, "\x00\x00\x08\x07\x00\x00\x00\x00\x00", 9);
1653
1654 if (h2c->last_sid < 0)
1655 h2c->last_sid = h2c->max_id;
1656
1657 write_n32(str + 9, h2c->last_sid);
1658 write_n32(str + 13, h2c->errcode);
1659
Willy Tarreaubcc45952019-05-26 10:05:50 +02001660 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001661 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001662 if (!h2_get_buf(h2c, res)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02001663 h2c->flags |= H2_CF_MUX_MALLOC;
1664 if (h2s)
1665 h2s->flags |= H2_SF_BLK_MROOM;
1666 else
1667 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001668 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001669 }
1670
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001671 ret = b_istput(res, ist2(str, 17));
Willy Tarreau081d4722017-05-16 21:51:05 +02001672 if (unlikely(ret <= 0)) {
1673 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001674 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1675 goto retry;
Willy Tarreau081d4722017-05-16 21:51:05 +02001676 h2c->flags |= H2_CF_MUX_MFULL;
1677 if (h2s)
1678 h2s->flags |= H2_SF_BLK_MROOM;
1679 else
1680 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001681 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001682 }
1683 else {
1684 /* we cannot report this error using GOAWAY, so we mark
1685 * it and claim a success.
1686 */
1687 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1688 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau7838a792019-08-12 18:42:03 +02001689 ret = 1;
1690 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001691 }
1692 }
1693 h2c->flags |= H2_CF_GOAWAY_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02001694 out:
1695 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
Willy Tarreau081d4722017-05-16 21:51:05 +02001696 return ret;
1697}
1698
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001699/* Try to send an RST_STREAM frame on the connection for the indicated stream
1700 * during mux operations. This stream must be valid and cannot be closed
1701 * already. h2s->id will be used for the stream ID and h2s->errcode will be
1702 * used for the error code. h2s->st will be update to H2_SS_CLOSED if it was
1703 * not yet.
1704 *
1705 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1706 * to write the message, it subscribes the stream to future notifications.
1707 */
1708static int h2s_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1709{
1710 struct buffer *res;
1711 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001712 int ret = 0;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001713
Willy Tarreau7838a792019-08-12 18:42:03 +02001714 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
1715
1716 if (!h2s || h2s->st == H2_SS_CLOSED) {
1717 ret = 1;
1718 goto out;
1719 }
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001720
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001721 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1722 * RST_STREAM in response to a RST_STREAM frame.
1723 */
Willy Tarreau231f6162019-08-06 10:01:40 +02001724 if (h2c->dsi == h2s->id && h2c->dft == H2_FT_RST_STREAM) {
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001725 ret = 1;
1726 goto ignore;
1727 }
1728
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001729 if (h2c_mux_busy(h2c, h2s)) {
1730 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001731 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001732 }
1733
Willy Tarreau9c218e72019-05-26 10:08:28 +02001734 /* len: 4, type: 3, flags: none */
1735 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1736 write_n32(str + 5, h2s->id);
1737 write_n32(str + 9, h2s->errcode);
1738
Willy Tarreaubcc45952019-05-26 10:05:50 +02001739 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001740 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001741 if (!h2_get_buf(h2c, res)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001742 h2c->flags |= H2_CF_MUX_MALLOC;
1743 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001744 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001745 }
1746
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001747 ret = b_istput(res, ist2(str, 13));
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001748 if (unlikely(ret <= 0)) {
1749 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001750 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1751 goto retry;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001752 h2c->flags |= H2_CF_MUX_MFULL;
1753 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001754 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001755 }
1756 else {
1757 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001758 ret = 0;
1759 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001760 }
1761 }
1762
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001763 ignore:
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001764 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001765 h2s_close(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001766 out:
1767 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001768 return ret;
1769}
1770
1771/* Try to send an RST_STREAM frame on the connection for the stream being
1772 * demuxed using h2c->dsi for the stream ID. It will use h2s->errcode as the
Willy Tarreaue6888ff2018-12-23 18:26:26 +01001773 * error code, even if the stream is one of the dummy ones, and will update
1774 * h2s->st to H2_SS_CLOSED if it was not yet.
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001775 *
1776 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1777 * to write the message, it blocks the demuxer and subscribes it to future
Joseph Herlantd77575d2018-11-25 10:54:45 -08001778 * notifications. It's worth mentioning that an RST may even be sent for a
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001779 * closed stream.
Willy Tarreau27a84c92017-10-17 08:10:17 +02001780 */
1781static int h2c_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1782{
1783 struct buffer *res;
1784 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001785 int ret = 0;
1786
1787 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02001788
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001789 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1790 * RST_STREAM in response to a RST_STREAM frame.
1791 */
1792 if (h2c->dft == H2_FT_RST_STREAM) {
1793 ret = 1;
1794 goto ignore;
1795 }
1796
Willy Tarreau27a84c92017-10-17 08:10:17 +02001797 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001798 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001799 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001800 }
1801
Willy Tarreau9c218e72019-05-26 10:08:28 +02001802 /* len: 4, type: 3, flags: none */
1803 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1804
1805 write_n32(str + 5, h2c->dsi);
1806 write_n32(str + 9, h2s->errcode);
1807
Willy Tarreaubcc45952019-05-26 10:05:50 +02001808 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001809 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001810 if (!h2_get_buf(h2c, res)) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02001811 h2c->flags |= H2_CF_MUX_MALLOC;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001812 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001813 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001814 }
1815
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001816 ret = b_istput(res, ist2(str, 13));
Willy Tarreau27a84c92017-10-17 08:10:17 +02001817 if (unlikely(ret <= 0)) {
1818 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001819 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1820 goto retry;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001821 h2c->flags |= H2_CF_MUX_MFULL;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001822 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001823 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001824 }
1825 else {
1826 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001827 ret = 0;
1828 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001829 }
1830 }
1831
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001832 ignore:
Willy Tarreauab0e1da2018-10-05 10:16:37 +02001833 if (h2s->id) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02001834 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001835 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001836 }
1837
Willy Tarreau7838a792019-08-12 18:42:03 +02001838 out:
1839 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02001840 return ret;
1841}
1842
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001843/* try to send an empty DATA frame with the ES flag set to notify about the
1844 * end of stream and match a shutdown(write). If an ES was already sent as
1845 * indicated by HLOC/ERROR/RESET/CLOSED states, nothing is done. Returns > 0
1846 * on success or zero if nothing was done. In case of lack of room to write the
1847 * message, it subscribes the requesting stream to future notifications.
1848 */
1849static int h2_send_empty_data_es(struct h2s *h2s)
1850{
1851 struct h2c *h2c = h2s->h2c;
1852 struct buffer *res;
1853 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02001854 int ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001855
Willy Tarreau7838a792019-08-12 18:42:03 +02001856 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
1857
1858 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED) {
1859 ret = 1;
1860 goto out;
1861 }
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001862
1863 if (h2c_mux_busy(h2c, h2s)) {
1864 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001865 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001866 }
1867
Willy Tarreau9c218e72019-05-26 10:08:28 +02001868 /* len: 0x000000, type: 0(DATA), flags: ES=1 */
1869 memcpy(str, "\x00\x00\x00\x00\x01", 5);
1870 write_n32(str + 5, h2s->id);
1871
Willy Tarreaubcc45952019-05-26 10:05:50 +02001872 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001873 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001874 if (!h2_get_buf(h2c, res)) {
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001875 h2c->flags |= H2_CF_MUX_MALLOC;
1876 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001877 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001878 }
1879
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001880 ret = b_istput(res, ist2(str, 9));
Willy Tarreau6d8b6822017-11-07 14:39:09 +01001881 if (likely(ret > 0)) {
1882 h2s->flags |= H2_SF_ES_SENT;
1883 }
1884 else if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001885 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1886 goto retry;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01001887 h2c->flags |= H2_CF_MUX_MFULL;
1888 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01001889 }
1890 else {
1891 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001892 ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001893 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001894 out:
1895 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001896 return ret;
1897}
1898
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001899/* wake a specific stream and assign its conn_stream som CS_FL_* flags among
Willy Tarreau99ad1b32019-05-14 11:46:28 +02001900 * CS_FL_ERR_PENDING and CS_FL_ERROR if needed. The stream's state
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001901 * is automatically updated accordingly. If the stream is orphaned, it is
1902 * destroyed.
Christopher Fauletf02ca002019-03-07 16:21:34 +01001903 */
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001904static void h2s_wake_one_stream(struct h2s *h2s)
Christopher Fauletf02ca002019-03-07 16:21:34 +01001905{
Willy Tarreau7838a792019-08-12 18:42:03 +02001906 struct h2c *h2c = h2s->h2c;
1907
1908 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn, h2s);
1909
Christopher Fauletf02ca002019-03-07 16:21:34 +01001910 if (!h2s->cs) {
1911 /* this stream was already orphaned */
1912 h2s_destroy(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001913 TRACE_DEVEL("leaving with no h2s", H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01001914 return;
1915 }
1916
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001917 if (conn_xprt_read0_pending(h2s->h2c->conn)) {
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001918 if (h2s->st == H2_SS_OPEN)
1919 h2s->st = H2_SS_HREM;
1920 else if (h2s->st == H2_SS_HLOC)
1921 h2s_close(h2s);
1922 }
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001923
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001924 if ((h2s->h2c->st0 >= H2_CS_ERROR || h2s->h2c->conn->flags & CO_FL_ERROR) ||
1925 (h2s->h2c->last_sid > 0 && (!h2s->id || h2s->id > h2s->h2c->last_sid))) {
1926 h2s->cs->flags |= CS_FL_ERR_PENDING;
1927 if (h2s->cs->flags & CS_FL_EOS)
1928 h2s->cs->flags |= CS_FL_ERROR;
Willy Tarreau23482912019-05-07 15:23:14 +02001929
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001930 if (h2s->st < H2_SS_ERROR)
1931 h2s->st = H2_SS_ERROR;
1932 }
Christopher Fauletf02ca002019-03-07 16:21:34 +01001933
1934 h2s_alert(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001935 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01001936}
1937
1938/* wake the streams attached to the connection, whose id is greater than <last>
1939 * or unassigned.
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001940 */
Willy Tarreau23482912019-05-07 15:23:14 +02001941static void h2_wake_some_streams(struct h2c *h2c, int last)
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001942{
1943 struct eb32_node *node;
1944 struct h2s *h2s;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001945
Willy Tarreau7838a792019-08-12 18:42:03 +02001946 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn);
1947
Christopher Fauletf02ca002019-03-07 16:21:34 +01001948 /* Wake all streams with ID > last */
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001949 node = eb32_lookup_ge(&h2c->streams_by_id, last + 1);
1950 while (node) {
1951 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001952 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001953 h2s_wake_one_stream(h2s);
Christopher Fauletf02ca002019-03-07 16:21:34 +01001954 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01001955
Christopher Fauletf02ca002019-03-07 16:21:34 +01001956 /* Wake all streams with unassigned ID (ID == 0) */
1957 node = eb32_lookup(&h2c->streams_by_id, 0);
1958 while (node) {
1959 h2s = container_of(node, struct h2s, by_id);
1960 if (h2s->id > 0)
1961 break;
1962 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001963 h2s_wake_one_stream(h2s);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001964 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001965
1966 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001967}
1968
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001969/* Wake up all blocked streams whose window size has become positive after the
1970 * mux's initial window was adjusted. This should be done after having processed
1971 * SETTINGS frames which have updated the mux's initial window size.
Willy Tarreau3421aba2017-07-27 15:41:03 +02001972 */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001973static void h2c_unblock_sfctl(struct h2c *h2c)
Willy Tarreau3421aba2017-07-27 15:41:03 +02001974{
1975 struct h2s *h2s;
1976 struct eb32_node *node;
1977
Willy Tarreau7838a792019-08-12 18:42:03 +02001978 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
1979
Willy Tarreau3421aba2017-07-27 15:41:03 +02001980 node = eb32_first(&h2c->streams_by_id);
1981 while (node) {
1982 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001983 if (h2s->flags & H2_SF_BLK_SFCTL && h2s_mws(h2s) > 0) {
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01001984 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02001985 LIST_DEL_INIT(&h2s->list);
1986 if (h2s->send_wait)
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01001987 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01001988 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02001989 node = eb32_next(node);
1990 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001991
1992 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02001993}
1994
1995/* processes a SETTINGS frame whose payload is <payload> for <plen> bytes, and
1996 * ACKs it if needed. Returns > 0 on success or zero on missing data. It may
Willy Tarreaub860c732019-01-30 15:39:55 +01001997 * return an error in h2c. The caller must have already verified frame length
1998 * and stream ID validity. Described in RFC7540#6.5.
Willy Tarreau3421aba2017-07-27 15:41:03 +02001999 */
2000static int h2c_handle_settings(struct h2c *h2c)
2001{
2002 unsigned int offset;
2003 int error;
2004
Willy Tarreau7838a792019-08-12 18:42:03 +02002005 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
2006
Willy Tarreau3421aba2017-07-27 15:41:03 +02002007 if (h2c->dff & H2_F_SETTINGS_ACK) {
2008 if (h2c->dfl) {
2009 error = H2_ERR_FRAME_SIZE_ERROR;
2010 goto fail;
2011 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002012 goto done;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002013 }
2014
Willy Tarreau3421aba2017-07-27 15:41:03 +02002015 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002016 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau7838a792019-08-12 18:42:03 +02002017 goto out0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002018
2019 /* parse the frame */
2020 for (offset = 0; offset < h2c->dfl; offset += 6) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002021 uint16_t type = h2_get_n16(&h2c->dbuf, offset);
2022 int32_t arg = h2_get_n32(&h2c->dbuf, offset + 2);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002023
2024 switch (type) {
2025 case H2_SETTINGS_INITIAL_WINDOW_SIZE:
2026 /* we need to update all existing streams with the
2027 * difference from the previous iws.
2028 */
2029 if (arg < 0) { // RFC7540#6.5.2
2030 error = H2_ERR_FLOW_CONTROL_ERROR;
2031 goto fail;
2032 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002033 h2c->miw = arg;
2034 break;
2035 case H2_SETTINGS_MAX_FRAME_SIZE:
2036 if (arg < 16384 || arg > 16777215) { // RFC7540#6.5.2
2037 error = H2_ERR_PROTOCOL_ERROR;
2038 goto fail;
2039 }
2040 h2c->mfs = arg;
2041 break;
Willy Tarreau1b38b462017-12-03 19:02:28 +01002042 case H2_SETTINGS_ENABLE_PUSH:
2043 if (arg < 0 || arg > 1) { // RFC7540#6.5.2
2044 error = H2_ERR_PROTOCOL_ERROR;
2045 goto fail;
2046 }
2047 break;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01002048 case H2_SETTINGS_MAX_CONCURRENT_STREAMS:
2049 if (h2c->flags & H2_CF_IS_BACK) {
2050 /* the limit is only for the backend; for the frontend it is our limit */
2051 if ((unsigned int)arg > h2_settings_max_concurrent_streams)
2052 arg = h2_settings_max_concurrent_streams;
2053 h2c->streams_limit = arg;
2054 }
2055 break;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002056 }
2057 }
2058
2059 /* need to ACK this frame now */
2060 h2c->st0 = H2_CS_FRAME_A;
Willy Tarreau7838a792019-08-12 18:42:03 +02002061 done:
2062 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002063 return 1;
2064 fail:
Willy Tarreau22de8d32018-09-05 19:55:58 +02002065 sess_log(h2c->conn->owner);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002066 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002067 out0:
2068 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 +02002069 return 0;
2070}
2071
2072/* try to send an ACK for a settings frame on the connection. Returns > 0 on
2073 * success or one of the h2_status values.
2074 */
2075static int h2c_ack_settings(struct h2c *h2c)
2076{
2077 struct buffer *res;
2078 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002079 int ret = 0;
2080
2081 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002082
2083 if (h2c_mux_busy(h2c, NULL)) {
2084 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002085 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002086 }
2087
Willy Tarreau9c218e72019-05-26 10:08:28 +02002088 memcpy(str,
2089 "\x00\x00\x00" /* length : 0 (no data) */
2090 "\x04" "\x01" /* type : 4, flags : ACK */
2091 "\x00\x00\x00\x00" /* stream ID */, 9);
2092
Willy Tarreaubcc45952019-05-26 10:05:50 +02002093 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002094 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002095 if (!h2_get_buf(h2c, res)) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02002096 h2c->flags |= H2_CF_MUX_MALLOC;
2097 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002098 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002099 }
2100
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002101 ret = b_istput(res, ist2(str, 9));
Willy Tarreau3421aba2017-07-27 15:41:03 +02002102 if (unlikely(ret <= 0)) {
2103 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002104 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2105 goto retry;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002106 h2c->flags |= H2_CF_MUX_MFULL;
2107 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002108 }
2109 else {
2110 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002111 ret = 0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002112 }
2113 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002114 out:
2115 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002116 return ret;
2117}
2118
Willy Tarreaucf68c782017-10-10 17:11:41 +02002119/* processes a PING frame and schedules an ACK if needed. The caller must pass
2120 * the pointer to the payload in <payload>. Returns > 0 on success or zero on
Willy Tarreaub860c732019-01-30 15:39:55 +01002121 * missing data. The caller must have already verified frame length
2122 * and stream ID validity.
Willy Tarreaucf68c782017-10-10 17:11:41 +02002123 */
2124static int h2c_handle_ping(struct h2c *h2c)
2125{
Willy Tarreaucf68c782017-10-10 17:11:41 +02002126 /* schedule a response */
Willy Tarreau68ed6412017-12-03 18:15:56 +01002127 if (!(h2c->dff & H2_F_PING_ACK))
Willy Tarreaucf68c782017-10-10 17:11:41 +02002128 h2c->st0 = H2_CS_FRAME_A;
2129 return 1;
2130}
2131
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002132/* Try to send a window update for stream id <sid> and value <increment>.
2133 * Returns > 0 on success or zero on missing room or failure. It may return an
2134 * error in h2c.
2135 */
2136static int h2c_send_window_update(struct h2c *h2c, int sid, uint32_t increment)
2137{
2138 struct buffer *res;
2139 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002140 int ret = 0;
2141
2142 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002143
2144 if (h2c_mux_busy(h2c, NULL)) {
2145 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002146 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002147 }
2148
Willy Tarreau9c218e72019-05-26 10:08:28 +02002149 /* length: 4, type: 8, flags: none */
2150 memcpy(str, "\x00\x00\x04\x08\x00", 5);
2151 write_n32(str + 5, sid);
2152 write_n32(str + 9, increment);
2153
Willy Tarreaubcc45952019-05-26 10:05:50 +02002154 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002155 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002156 if (!h2_get_buf(h2c, res)) {
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002157 h2c->flags |= H2_CF_MUX_MALLOC;
2158 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002159 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002160 }
2161
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002162 ret = b_istput(res, ist2(str, 13));
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002163 if (unlikely(ret <= 0)) {
2164 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002165 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2166 goto retry;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002167 h2c->flags |= H2_CF_MUX_MFULL;
2168 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002169 }
2170 else {
2171 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002172 ret = 0;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002173 }
2174 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002175 out:
2176 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002177 return ret;
2178}
2179
2180/* try to send pending window update for the connection. It's safe to call it
2181 * with no pending updates. Returns > 0 on success or zero on missing room or
2182 * failure. It may return an error in h2c.
2183 */
2184static int h2c_send_conn_wu(struct h2c *h2c)
2185{
2186 int ret = 1;
2187
Willy Tarreau7838a792019-08-12 18:42:03 +02002188 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2189
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002190 if (h2c->rcvd_c <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002191 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002192
Willy Tarreau97aaa672018-12-23 09:49:04 +01002193 if (!(h2c->flags & H2_CF_WINDOW_OPENED)) {
2194 /* increase the advertised connection window to 2G on
2195 * first update.
2196 */
2197 h2c->flags |= H2_CF_WINDOW_OPENED;
2198 h2c->rcvd_c += H2_INITIAL_WINDOW_INCREMENT;
2199 }
2200
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002201 /* send WU for the connection */
2202 ret = h2c_send_window_update(h2c, 0, h2c->rcvd_c);
2203 if (ret > 0)
2204 h2c->rcvd_c = 0;
2205
Willy Tarreau7838a792019-08-12 18:42:03 +02002206 out:
2207 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002208 return ret;
2209}
2210
2211/* try to send pending window update for the current dmux stream. It's safe to
2212 * call it with no pending updates. Returns > 0 on success or zero on missing
2213 * room or failure. It may return an error in h2c.
2214 */
2215static int h2c_send_strm_wu(struct h2c *h2c)
2216{
2217 int ret = 1;
2218
Willy Tarreau7838a792019-08-12 18:42:03 +02002219 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2220
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002221 if (h2c->rcvd_s <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002222 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002223
2224 /* send WU for the stream */
2225 ret = h2c_send_window_update(h2c, h2c->dsi, h2c->rcvd_s);
2226 if (ret > 0)
2227 h2c->rcvd_s = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002228 out:
2229 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002230 return ret;
2231}
2232
Willy Tarreaucf68c782017-10-10 17:11:41 +02002233/* try to send an ACK for a ping frame on the connection. Returns > 0 on
2234 * success, 0 on missing data or one of the h2_status values.
2235 */
2236static int h2c_ack_ping(struct h2c *h2c)
2237{
2238 struct buffer *res;
2239 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02002240 int ret = 0;
2241
2242 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002243
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002244 if (b_data(&h2c->dbuf) < 8)
Willy Tarreau7838a792019-08-12 18:42:03 +02002245 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002246
2247 if (h2c_mux_busy(h2c, NULL)) {
2248 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002249 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002250 }
2251
Willy Tarreaucf68c782017-10-10 17:11:41 +02002252 memcpy(str,
2253 "\x00\x00\x08" /* length : 8 (same payload) */
2254 "\x06" "\x01" /* type : 6, flags : ACK */
2255 "\x00\x00\x00\x00" /* stream ID */, 9);
2256
2257 /* copy the original payload */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002258 h2_get_buf_bytes(str + 9, 8, &h2c->dbuf, 0);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002259
Willy Tarreau9c218e72019-05-26 10:08:28 +02002260 res = br_tail(h2c->mbuf);
2261 retry:
2262 if (!h2_get_buf(h2c, res)) {
2263 h2c->flags |= H2_CF_MUX_MALLOC;
2264 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002265 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02002266 }
2267
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002268 ret = b_istput(res, ist2(str, 17));
Willy Tarreaucf68c782017-10-10 17:11:41 +02002269 if (unlikely(ret <= 0)) {
2270 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002271 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2272 goto retry;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002273 h2c->flags |= H2_CF_MUX_MFULL;
2274 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002275 }
2276 else {
2277 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002278 ret = 0;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002279 }
2280 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002281 out:
2282 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002283 return ret;
2284}
2285
Willy Tarreau26f95952017-07-27 17:18:30 +02002286/* processes a WINDOW_UPDATE frame whose payload is <payload> for <plen> bytes.
2287 * Returns > 0 on success or zero on missing data. It may return an error in
Willy Tarreaub860c732019-01-30 15:39:55 +01002288 * h2c or h2s. The caller must have already verified frame length and stream ID
2289 * validity. Described in RFC7540#6.9.
Willy Tarreau26f95952017-07-27 17:18:30 +02002290 */
2291static int h2c_handle_window_update(struct h2c *h2c, struct h2s *h2s)
2292{
2293 int32_t inc;
2294 int error;
2295
Willy Tarreau7838a792019-08-12 18:42:03 +02002296 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
2297
Willy Tarreau26f95952017-07-27 17:18:30 +02002298 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002299 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau7838a792019-08-12 18:42:03 +02002300 goto out0;
Willy Tarreau26f95952017-07-27 17:18:30 +02002301
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002302 inc = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau26f95952017-07-27 17:18:30 +02002303
2304 if (h2c->dsi != 0) {
2305 /* stream window update */
Willy Tarreau26f95952017-07-27 17:18:30 +02002306
2307 /* it's not an error to receive WU on a closed stream */
2308 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau7838a792019-08-12 18:42:03 +02002309 goto done;
Willy Tarreau26f95952017-07-27 17:18:30 +02002310
2311 if (!inc) {
2312 error = H2_ERR_PROTOCOL_ERROR;
2313 goto strm_err;
2314 }
2315
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002316 if (h2s_mws(h2s) >= 0 && h2s_mws(h2s) + inc < 0) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002317 error = H2_ERR_FLOW_CONTROL_ERROR;
2318 goto strm_err;
2319 }
2320
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002321 h2s->sws += inc;
2322 if (h2s_mws(h2s) > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002323 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002324 LIST_DEL_INIT(&h2s->list);
2325 if (h2s->send_wait)
Olivier Houcharddddfe312018-10-10 18:51:00 +02002326 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreau26f95952017-07-27 17:18:30 +02002327 }
2328 }
2329 else {
2330 /* connection window update */
2331 if (!inc) {
2332 error = H2_ERR_PROTOCOL_ERROR;
2333 goto conn_err;
2334 }
2335
2336 if (h2c->mws >= 0 && h2c->mws + inc < 0) {
2337 error = H2_ERR_FLOW_CONTROL_ERROR;
2338 goto conn_err;
2339 }
2340
2341 h2c->mws += inc;
2342 }
2343
Willy Tarreau7838a792019-08-12 18:42:03 +02002344 done:
2345 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002346 return 1;
2347
2348 conn_err:
2349 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002350 out0:
2351 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 +02002352 return 0;
2353
2354 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002355 h2s_error(h2s, error);
2356 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002357 TRACE_DEVEL("leaving on stream error", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002358 return 0;
2359}
2360
Willy Tarreaue96b0922017-10-30 00:28:29 +01002361/* processes a GOAWAY frame, and signals all streams whose ID is greater than
Willy Tarreaub860c732019-01-30 15:39:55 +01002362 * the last ID. Returns > 0 on success or zero on missing data. The caller must
2363 * have already verified frame length and stream ID validity. Described in
2364 * RFC7540#6.8.
Willy Tarreaue96b0922017-10-30 00:28:29 +01002365 */
2366static int h2c_handle_goaway(struct h2c *h2c)
2367{
Willy Tarreaue96b0922017-10-30 00:28:29 +01002368 int last;
2369
Willy Tarreau7838a792019-08-12 18:42:03 +02002370 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002371 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002372 if (b_data(&h2c->dbuf) < h2c->dfl) {
2373 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002374 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002375 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01002376
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002377 last = h2_get_n32(&h2c->dbuf, 0);
2378 h2c->errcode = h2_get_n32(&h2c->dbuf, 4);
Willy Tarreau11cc2d62017-12-03 10:27:47 +01002379 if (h2c->last_sid < 0)
2380 h2c->last_sid = last;
Willy Tarreau23482912019-05-07 15:23:14 +02002381 h2_wake_some_streams(h2c, last);
Willy Tarreau7838a792019-08-12 18:42:03 +02002382 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002383 return 1;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002384}
2385
Willy Tarreau92153fc2017-12-03 19:46:19 +01002386/* processes a PRIORITY frame, and either skips it or rejects if it is
Willy Tarreaub860c732019-01-30 15:39:55 +01002387 * invalid. Returns > 0 on success or zero on missing data. It may return an
2388 * error in h2c. The caller must have already verified frame length and stream
2389 * ID validity. Described in RFC7540#6.3.
Willy Tarreau92153fc2017-12-03 19:46:19 +01002390 */
2391static int h2c_handle_priority(struct h2c *h2c)
2392{
Willy Tarreau7838a792019-08-12 18:42:03 +02002393 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
2394
Willy Tarreau92153fc2017-12-03 19:46:19 +01002395 /* process full frame only */
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002396 if (b_data(&h2c->dbuf) < h2c->dfl) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002397 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002398 return 0;
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002399 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01002400
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002401 if (h2_get_n32(&h2c->dbuf, 0) == h2c->dsi) {
Willy Tarreau92153fc2017-12-03 19:46:19 +01002402 /* 7540#5.3 : can't depend on itself */
Willy Tarreaub860c732019-01-30 15:39:55 +01002403 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002404 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002405 return 0;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002406 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002407 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002408 return 1;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002409}
2410
Willy Tarreaucd234e92017-08-18 10:59:39 +02002411/* processes an RST_STREAM frame, and sets the 32-bit error code on the stream.
Willy Tarreaub860c732019-01-30 15:39:55 +01002412 * Returns > 0 on success or zero on missing data. The caller must have already
2413 * verified frame length and stream ID validity. Described in RFC7540#6.4.
Willy Tarreaucd234e92017-08-18 10:59:39 +02002414 */
2415static int h2c_handle_rst_stream(struct h2c *h2c, struct h2s *h2s)
2416{
Willy Tarreau7838a792019-08-12 18:42:03 +02002417 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
2418
Willy Tarreaucd234e92017-08-18 10:59:39 +02002419 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002420 if (b_data(&h2c->dbuf) < h2c->dfl) {
2421 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002422 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002423 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002424
2425 /* late RST, already handled */
Willy Tarreau7838a792019-08-12 18:42:03 +02002426 if (h2s->st == H2_SS_CLOSED) {
2427 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 +02002428 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002429 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002430
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002431 h2s->errcode = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau00dd0782018-03-01 16:31:34 +01002432 h2s_close(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002433
2434 if (h2s->cs) {
Willy Tarreauec988c72018-12-19 18:00:29 +01002435 cs_set_error(h2s->cs);
Willy Tarreauf830f012018-12-19 17:44:55 +01002436 h2s_alert(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002437 }
2438
2439 h2s->flags |= H2_SF_RST_RCVD;
Willy Tarreau7838a792019-08-12 18:42:03 +02002440 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002441 return 1;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002442}
2443
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002444/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2445 * It may return an error in h2c or h2s. The caller must consider that the
2446 * return value is the new h2s in case one was allocated (most common case).
2447 * Described in RFC7540#6.2. Most of the
Willy Tarreau13278b42017-10-13 19:23:14 +02002448 * errors here are reported as connection errors since it's impossible to
2449 * recover from such errors after the compression context has been altered.
2450 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002451static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau13278b42017-10-13 19:23:14 +02002452{
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002453 struct buffer rxbuf = BUF_NULL;
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002454 unsigned long long body_len = 0;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002455 uint32_t flags = 0;
Willy Tarreau13278b42017-10-13 19:23:14 +02002456 int error;
2457
Willy Tarreau7838a792019-08-12 18:42:03 +02002458 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2459
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002460 if (!b_size(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002461 goto out; // empty buffer
Willy Tarreau13278b42017-10-13 19:23:14 +02002462
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002463 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002464 goto out; // incomplete frame
Willy Tarreau13278b42017-10-13 19:23:14 +02002465
2466 /* now either the frame is complete or the buffer is complete */
2467 if (h2s->st != H2_SS_IDLE) {
Willy Tarreau88d138e2019-01-02 19:38:14 +01002468 /* The stream exists/existed, this must be a trailers frame */
2469 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreauaab1a602019-05-06 11:12:18 +02002470 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &body_len);
2471 /* unrecoverable error ? */
2472 if (h2c->st0 >= H2_CS_ERROR)
2473 goto out;
2474
2475 if (error == 0)
2476 goto out; // missing data
2477
2478 if (error < 0) {
2479 /* Failed to decode this frame (e.g. too large request)
2480 * but the HPACK decompressor is still synchronized.
2481 */
2482 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
2483 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau88d138e2019-01-02 19:38:14 +01002484 goto out;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002485 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01002486 goto done;
2487 }
Willy Tarreau1f035502019-01-30 11:44:07 +01002488 /* the connection was already killed by an RST, let's consume
2489 * the data and send another RST.
2490 */
2491 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
2492 h2s = (struct h2s*)h2_error_stream;
2493 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002494 }
2495 else if (h2c->dsi <= h2c->max_id || !(h2c->dsi & 1)) {
2496 /* RFC7540#5.1.1 stream id > prev ones, and must be odd here */
2497 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002498 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02002499 goto conn_err;
2500 }
Willy Tarreau415b1ee2019-01-02 13:59:43 +01002501 else if (h2c->flags & H2_CF_DEM_TOOMANY)
2502 goto out; // IDLE but too many cs still present
Willy Tarreau13278b42017-10-13 19:23:14 +02002503
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002504 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002505
Willy Tarreau25919232019-01-03 14:48:18 +01002506 /* unrecoverable error ? */
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002507 if (h2c->st0 >= H2_CS_ERROR)
2508 goto out;
2509
Willy Tarreau25919232019-01-03 14:48:18 +01002510 if (error <= 0) {
2511 if (error == 0)
2512 goto out; // missing data
2513
2514 /* Failed to decode this stream (e.g. too large request)
2515 * but the HPACK decompressor is still synchronized.
2516 */
2517 h2s = (struct h2s*)h2_error_stream;
2518 goto send_rst;
2519 }
2520
Willy Tarreau22de8d32018-09-05 19:55:58 +02002521 /* Note: we don't emit any other logs below because ff we return
Willy Tarreaua8e49542018-10-03 18:53:55 +02002522 * positively from h2c_frt_stream_new(), the stream will report the error,
2523 * and if we return in error, h2c_frt_stream_new() will emit the error.
Willy Tarreau22de8d32018-09-05 19:55:58 +02002524 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02002525 h2s = h2c_frt_stream_new(h2c, h2c->dsi);
Willy Tarreau13278b42017-10-13 19:23:14 +02002526 if (!h2s) {
Willy Tarreau96a10c22018-12-23 18:30:44 +01002527 h2s = (struct h2s*)h2_refused_stream;
2528 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002529 }
2530
2531 h2s->st = H2_SS_OPEN;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002532 h2s->rxbuf = rxbuf;
2533 h2s->flags |= flags;
Willy Tarreau1915ca22019-01-24 11:49:37 +01002534 h2s->body_len = body_len;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002535
Willy Tarreau88d138e2019-01-02 19:38:14 +01002536 done:
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002537 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau13278b42017-10-13 19:23:14 +02002538 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002539
2540 if (h2s->flags & H2_SF_ES_RCVD) {
Willy Tarreaufc10f592019-01-30 19:28:32 +01002541 if (h2s->st == H2_SS_OPEN)
2542 h2s->st = H2_SS_HREM;
2543 else
2544 h2s_close(h2s);
Willy Tarreau13278b42017-10-13 19:23:14 +02002545 }
2546
Willy Tarreau3a429f02019-01-03 11:41:50 +01002547 /* update the max stream ID if the request is being processed */
2548 if (h2s->id > h2c->max_id)
2549 h2c->max_id = h2s->id;
Willy Tarreau13278b42017-10-13 19:23:14 +02002550
Willy Tarreau8fecec22019-08-30 07:29:53 +02002551 TRACE_USER("rcvd H2 request ", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW, h2c->conn,, &rxbuf);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002552 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002553
2554 conn_err:
2555 h2c_error(h2c, error);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002556 goto out;
Willy Tarreau13278b42017-10-13 19:23:14 +02002557
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002558 out:
2559 h2_release_buf(h2c, &rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002560 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 +01002561 return NULL;
Willy Tarreau96a10c22018-12-23 18:30:44 +01002562
2563 send_rst:
2564 /* make the demux send an RST for the current stream. We may only
2565 * do this if we're certain that the HEADERS frame was properly
2566 * decompressed so that the HPACK decoder is still kept up to date.
2567 */
2568 h2_release_buf(h2c, &rxbuf);
2569 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002570
2571 TRACE_USER("rejected H2 request", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn,, &rxbuf);
2572 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau96a10c22018-12-23 18:30:44 +01002573 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002574}
2575
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002576/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2577 * It may return an error in h2c or h2s. Described in RFC7540#6.2. Most of the
2578 * errors here are reported as connection errors since it's impossible to
2579 * recover from such errors after the compression context has been altered.
2580 */
2581static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
2582{
Christopher Faulet6884aa32019-09-23 15:28:20 +02002583 struct buffer rxbuf = BUF_NULL;
2584 unsigned long long body_len = 0;
2585 uint32_t flags = 0;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002586 int error;
2587
Willy Tarreau7838a792019-08-12 18:42:03 +02002588 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2589
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002590 if (!b_size(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002591 goto fail; // empty buffer
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002592
2593 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002594 goto fail; // incomplete frame
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002595
Christopher Faulet6884aa32019-09-23 15:28:20 +02002596 if (h2s->st != H2_SS_CLOSED) {
2597 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &h2s->body_len);
2598 }
2599 else {
2600 /* the connection was already killed by an RST, let's consume
2601 * the data and send another RST.
2602 */
2603 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
Christopher Fauletea7a7782019-09-26 16:19:13 +02002604 h2s = (struct h2s*)h2_error_stream;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002605 h2c->st0 = H2_CS_FRAME_E;
2606 goto send_rst;
2607 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002608
Willy Tarreau25919232019-01-03 14:48:18 +01002609 /* unrecoverable error ? */
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002610 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002611 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002612
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002613 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2614 /* RFC7540#5.1 */
2615 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2616 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002617 goto fail;
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002618 }
2619
Willy Tarreau25919232019-01-03 14:48:18 +01002620 if (error <= 0) {
2621 if (error == 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002622 goto fail; // missing data
Willy Tarreau25919232019-01-03 14:48:18 +01002623
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002624 /* stream error : send RST_STREAM */
Willy Tarreau25919232019-01-03 14:48:18 +01002625 h2s_error(h2s, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002626 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002627 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002628 }
2629
Christopher Fauletfa922f02019-05-07 10:55:17 +02002630 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002631 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002632
Willy Tarreau927b88b2019-03-04 08:03:25 +01002633 if (h2s->cs && h2s->cs->flags & CS_FL_ERROR && h2s->st < H2_SS_ERROR)
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002634 h2s->st = H2_SS_ERROR;
Christopher Fauletfa922f02019-05-07 10:55:17 +02002635 else if (h2s->flags & H2_SF_ES_RCVD) {
2636 if (h2s->st == H2_SS_OPEN)
2637 h2s->st = H2_SS_HREM;
2638 else if (h2s->st == H2_SS_HLOC)
2639 h2s_close(h2s);
2640 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002641
Willy Tarreau8fecec22019-08-30 07:29:53 +02002642 TRACE_USER("rcvd H2 response", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn,, &h2s->rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002643 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002644 return h2s;
Willy Tarreau7838a792019-08-12 18:42:03 +02002645 fail:
2646 TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2647 return NULL;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002648
2649 send_rst:
2650 /* make the demux send an RST for the current stream. We may only
2651 * do this if we're certain that the HEADERS frame was properly
2652 * decompressed so that the HPACK decoder is still kept up to date.
2653 */
2654 h2_release_buf(h2c, &rxbuf);
2655 h2c->st0 = H2_CS_FRAME_E;
2656
2657 TRACE_USER("rejected H2 response", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn,, &rxbuf);
2658 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2659 return h2s;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002660}
2661
Willy Tarreau454f9052017-10-26 19:40:35 +02002662/* processes a DATA frame. Returns > 0 on success or zero on missing data.
2663 * It may return an error in h2c or h2s. Described in RFC7540#6.1.
2664 */
2665static int h2c_frt_handle_data(struct h2c *h2c, struct h2s *h2s)
2666{
2667 int error;
2668
Willy Tarreau7838a792019-08-12 18:42:03 +02002669 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2670
Willy Tarreau454f9052017-10-26 19:40:35 +02002671 /* note that empty DATA frames are perfectly valid and sometimes used
2672 * to signal an end of stream (with the ES flag).
2673 */
2674
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002675 if (!b_size(&h2c->dbuf) && h2c->dfl)
Willy Tarreau7838a792019-08-12 18:42:03 +02002676 goto fail; // empty buffer
Willy Tarreau454f9052017-10-26 19:40:35 +02002677
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002678 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002679 goto fail; // incomplete frame
Willy Tarreau454f9052017-10-26 19:40:35 +02002680
2681 /* now either the frame is complete or the buffer is complete */
2682
Willy Tarreau454f9052017-10-26 19:40:35 +02002683 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2684 /* RFC7540#6.1 */
2685 error = H2_ERR_STREAM_CLOSED;
2686 goto strm_err;
2687 }
2688
Christopher Faulet4f09ec82019-06-19 09:25:58 +02002689 if ((h2s->flags & H2_SF_DATA_CLEN) && (h2c->dfl - h2c->dpl) > h2s->body_len) {
Willy Tarreau1915ca22019-01-24 11:49:37 +01002690 /* RFC7540#8.1.2 */
2691 error = H2_ERR_PROTOCOL_ERROR;
2692 goto strm_err;
2693 }
2694
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002695 if (!h2_frt_transfer_data(h2s))
Willy Tarreau7838a792019-08-12 18:42:03 +02002696 goto fail;
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002697
Willy Tarreau454f9052017-10-26 19:40:35 +02002698 /* call the upper layers to process the frame, then let the upper layer
2699 * notify the stream about any change.
2700 */
2701 if (!h2s->cs) {
Willy Tarreau082c4572019-08-06 10:11:02 +02002702 /* The upper layer has already closed, this may happen on
2703 * 4xx/redirects during POST, or when receiving a response
2704 * from an H2 server after the client has aborted.
2705 */
2706 error = H2_ERR_CANCEL;
Willy Tarreau454f9052017-10-26 19:40:35 +02002707 goto strm_err;
2708 }
2709
Willy Tarreau8f650c32017-11-21 19:36:21 +01002710 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002711 goto fail;
Willy Tarreau8f650c32017-11-21 19:36:21 +01002712
Willy Tarreau721c9742017-11-07 11:05:42 +01002713 if (h2s->st >= H2_SS_ERROR) {
Willy Tarreau454f9052017-10-26 19:40:35 +02002714 /* stream error : send RST_STREAM */
Willy Tarreaua20a5192017-12-27 11:02:06 +01002715 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02002716 }
2717
2718 /* check for completion : the callee will change this to FRAME_A or
2719 * FRAME_H once done.
2720 */
2721 if (h2c->st0 == H2_CS_FRAME_P)
Willy Tarreau7838a792019-08-12 18:42:03 +02002722 goto fail;
Willy Tarreau454f9052017-10-26 19:40:35 +02002723
Willy Tarreauc4134ba2017-12-11 18:45:08 +01002724 /* last frame */
2725 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02002726 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreaufc10f592019-01-30 19:28:32 +01002727 if (h2s->st == H2_SS_OPEN)
2728 h2s->st = H2_SS_HREM;
2729 else
2730 h2s_close(h2s);
2731
Willy Tarreau1915ca22019-01-24 11:49:37 +01002732 if (h2s->flags & H2_SF_DATA_CLEN && h2s->body_len) {
2733 /* RFC7540#8.1.2 */
2734 error = H2_ERR_PROTOCOL_ERROR;
2735 goto strm_err;
2736 }
Willy Tarreauc4134ba2017-12-11 18:45:08 +01002737 }
2738
Willy Tarreau7838a792019-08-12 18:42:03 +02002739 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02002740 return 1;
2741
Willy Tarreau454f9052017-10-26 19:40:35 +02002742 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002743 h2s_error(h2s, error);
2744 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002745 fail:
2746 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 +02002747 return 0;
2748}
2749
Willy Tarreau63864812019-08-07 14:25:20 +02002750/* check that the current frame described in h2c->{dsi,dft,dfl,dff,...} is
2751 * valid for the current stream state. This is needed only after parsing the
2752 * frame header but in practice it can be performed at any time during
2753 * H2_CS_FRAME_P since no state transition happens there. Returns >0 on success
2754 * or 0 in case of error, in which case either h2s or h2c will carry an error.
2755 */
2756static int h2_frame_check_vs_state(struct h2c *h2c, struct h2s *h2s)
2757{
Willy Tarreau7838a792019-08-12 18:42:03 +02002758 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
2759
Willy Tarreau63864812019-08-07 14:25:20 +02002760 if (h2s->st == H2_SS_IDLE &&
2761 h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) {
2762 /* RFC7540#5.1: any frame other than HEADERS or PRIORITY in
2763 * this state MUST be treated as a connection error
2764 */
2765 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2766 if (!h2c->nb_streams) {
2767 /* only log if no other stream can report the error */
2768 sess_log(h2c->conn->owner);
2769 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002770 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 +02002771 return 0;
2772 }
2773
2774 if (h2s->st == H2_SS_HREM && h2c->dft != H2_FT_WINDOW_UPDATE &&
2775 h2c->dft != H2_FT_RST_STREAM && h2c->dft != H2_FT_PRIORITY) {
2776 /* RFC7540#5.1: any frame other than WU/PRIO/RST in
2777 * this state MUST be treated as a stream error.
2778 * 6.2, 6.6 and 6.10 further mandate that HEADERS/
2779 * PUSH_PROMISE/CONTINUATION cause connection errors.
2780 */
2781 if (h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK)
2782 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2783 else
2784 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02002785 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 +02002786 return 0;
2787 }
2788
2789 /* Below the management of frames received in closed state is a
2790 * bit hackish because the spec makes strong differences between
2791 * streams closed by receiving RST, sending RST, and seeing ES
2792 * in both directions. In addition to this, the creation of a
2793 * new stream reusing the identifier of a closed one will be
2794 * detected here. Given that we cannot keep track of all closed
2795 * streams forever, we consider that unknown closed streams were
2796 * closed on RST received, which allows us to respond with an
2797 * RST without breaking the connection (eg: to abort a transfer).
2798 * Some frames have to be silently ignored as well.
2799 */
2800 if (h2s->st == H2_SS_CLOSED && h2c->dsi) {
2801 if (!(h2c->flags & H2_CF_IS_BACK) && h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
2802 /* #5.1.1: The identifier of a newly
2803 * established stream MUST be numerically
2804 * greater than all streams that the initiating
2805 * endpoint has opened or reserved. This
2806 * governs streams that are opened using a
2807 * HEADERS frame and streams that are reserved
2808 * using PUSH_PROMISE. An endpoint that
2809 * receives an unexpected stream identifier
2810 * MUST respond with a connection error.
2811 */
2812 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02002813 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 +02002814 return 0;
2815 }
2816
Willy Tarreau4c08f122019-09-26 08:47:15 +02002817 if (h2s->flags & H2_SF_RST_RCVD &&
2818 !(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 +02002819 /* RFC7540#5.1:closed: an endpoint that
2820 * receives any frame other than PRIORITY after
2821 * receiving a RST_STREAM MUST treat that as a
2822 * stream error of type STREAM_CLOSED.
2823 *
2824 * Note that old streams fall into this category
2825 * and will lead to an RST being sent.
2826 *
2827 * However, we cannot generalize this to all frame types. Those
2828 * carrying compression state must still be processed before
2829 * being dropped or we'll desynchronize the decoder. This can
2830 * happen with request trailers received after sending an
2831 * RST_STREAM, or with header/trailers responses received after
2832 * sending RST_STREAM (aborted stream).
Willy Tarreau4c08f122019-09-26 08:47:15 +02002833 *
2834 * In addition, since our CLOSED streams always carry the
2835 * RST_RCVD bit, we don't want to accidently catch valid
2836 * frames for a closed stream, i.e. RST/PRIO/WU.
Willy Tarreau63864812019-08-07 14:25:20 +02002837 */
2838 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2839 h2c->st0 = H2_CS_FRAME_E;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002840 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 +02002841 return 0;
2842 }
2843
2844 /* RFC7540#5.1:closed: if this state is reached as a
2845 * result of sending a RST_STREAM frame, the peer that
2846 * receives the RST_STREAM might have already sent
2847 * frames on the stream that cannot be withdrawn. An
2848 * endpoint MUST ignore frames that it receives on
2849 * closed streams after it has sent a RST_STREAM
2850 * frame. An endpoint MAY choose to limit the period
2851 * over which it ignores frames and treat frames that
2852 * arrive after this time as being in error.
2853 */
2854 if (h2s->id && !(h2s->flags & H2_SF_RST_SENT)) {
2855 /* RFC7540#5.1:closed: any frame other than
2856 * PRIO/WU/RST in this state MUST be treated as
2857 * a connection error
2858 */
2859 if (h2c->dft != H2_FT_RST_STREAM &&
2860 h2c->dft != H2_FT_PRIORITY &&
2861 h2c->dft != H2_FT_WINDOW_UPDATE) {
2862 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02002863 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 +02002864 return 0;
2865 }
2866 }
2867 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002868 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02002869 return 1;
2870}
2871
Willy Tarreaubc933932017-10-09 16:21:43 +02002872/* process Rx frames to be demultiplexed */
2873static void h2_process_demux(struct h2c *h2c)
2874{
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002875 struct h2s *h2s = NULL, *tmp_h2s;
Willy Tarreau54f46e52019-01-30 15:11:03 +01002876 struct h2_fh hdr;
2877 unsigned int padlen = 0;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002878 int32_t old_iw = h2c->miw;
Willy Tarreauf3ee0692017-10-17 08:18:25 +02002879
Willy Tarreau7838a792019-08-12 18:42:03 +02002880 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
2881
Willy Tarreau081d4722017-05-16 21:51:05 +02002882 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002883 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02002884
2885 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
2886 if (h2c->st0 == H2_CS_PREFACE) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002887 TRACE_STATE("expecting preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02002888 if (h2c->flags & H2_CF_IS_BACK)
Willy Tarreau7838a792019-08-12 18:42:03 +02002889 goto out;
2890
Willy Tarreau52eed752017-09-22 15:05:09 +02002891 if (unlikely(h2c_frt_recv_preface(h2c) <= 0)) {
2892 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02002893 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002894 TRACE_PROTO("failed to receive preface", H2_EV_RX_PREFACE|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02002895 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002896 sess_log(h2c->conn->owner);
2897 }
Willy Tarreau52eed752017-09-22 15:05:09 +02002898 goto fail;
2899 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002900 TRACE_PROTO("received preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02002901
2902 h2c->max_id = 0;
2903 h2c->st0 = H2_CS_SETTINGS1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002904 TRACE_STATE("switching to SETTINGS1", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02002905 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002906
2907 if (h2c->st0 == H2_CS_SETTINGS1) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002908 /* ensure that what is pending is a valid SETTINGS frame
2909 * without an ACK.
2910 */
Willy Tarreau7838a792019-08-12 18:42:03 +02002911 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 +02002912 if (!h2_get_frame_hdr(&h2c->dbuf, &hdr)) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002913 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02002914 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002915 TRACE_PROTO("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 +02002916 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002917 sess_log(h2c->conn->owner);
2918 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002919 goto fail;
2920 }
2921
2922 if (hdr.sid || hdr.ft != H2_FT_SETTINGS || hdr.ff & H2_F_SETTINGS_ACK) {
2923 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau7838a792019-08-12 18:42:03 +02002924 TRACE_PROTO("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 +02002925 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2926 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002927 sess_log(h2c->conn->owner);
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002928 goto fail;
2929 }
2930
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02002931 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002932 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau7838a792019-08-12 18:42:03 +02002933 TRACE_PROTO("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 +02002934 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
2935 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002936 sess_log(h2c->conn->owner);
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002937 goto fail;
2938 }
2939
Willy Tarreau3bf69182018-12-21 15:34:50 +01002940 /* that's OK, switch to FRAME_P to process it. This is
2941 * a SETTINGS frame whose header has already been
2942 * deleted above.
2943 */
Willy Tarreau54f46e52019-01-30 15:11:03 +01002944 padlen = 0;
2945 goto new_frame;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002946 }
Willy Tarreau52eed752017-09-22 15:05:09 +02002947 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002948
2949 /* process as many incoming frames as possible below */
Willy Tarreau7838a792019-08-12 18:42:03 +02002950 while (1) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02002951 int ret = 0;
2952
Willy Tarreau7838a792019-08-12 18:42:03 +02002953 if (!b_data(&h2c->dbuf)) {
2954 TRACE_DEVEL("no more Rx data", H2_EV_RX_FRAME, h2c->conn);
2955 break;
2956 }
2957
2958 if (h2c->st0 >= H2_CS_ERROR) {
2959 TRACE_STATE("end of connection reported", H2_EV_RX_FRAME|H2_EV_RX_EOI, h2c->conn);
Willy Tarreau7e98c052017-10-10 15:56:59 +02002960 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02002961 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002962
2963 if (h2c->st0 == H2_CS_FRAME_H) {
Willy Tarreau30d05f32019-08-06 15:49:51 +02002964 h2c->rcvd_s = 0;
2965
Willy Tarreau7838a792019-08-12 18:42:03 +02002966 TRACE_STATE("expecting H2 frame header", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
Willy Tarreaua4428bd2018-12-22 18:11:41 +01002967 if (!h2_peek_frame_hdr(&h2c->dbuf, 0, &hdr))
Willy Tarreau7e98c052017-10-10 15:56:59 +02002968 break;
2969
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02002970 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002971 TRACE_PROTO("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 +02002972 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau22de8d32018-09-05 19:55:58 +02002973 if (!h2c->nb_streams) {
2974 /* only log if no other stream can report the error */
2975 sess_log(h2c->conn->owner);
2976 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002977 break;
2978 }
2979
Christopher Fauletdd2a5622019-06-18 12:22:38 +02002980 padlen = 0;
Willy Tarreau3bf69182018-12-21 15:34:50 +01002981 if (h2_ft_bit(hdr.ft) & H2_FT_PADDED_MASK && hdr.ff & H2_F_PADDED) {
2982 /* If the frame is padded (HEADERS, PUSH_PROMISE or DATA),
2983 * we read the pad length and drop it from the remaining
2984 * payload (one byte + the 9 remaining ones = 10 total
2985 * removed), so we have a frame payload starting after the
2986 * pad len. Flow controlled frames (DATA) also count the
2987 * padlen in the flow control, so it must be adjusted.
2988 */
2989 if (hdr.len < 1) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002990 TRACE_PROTO("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 +01002991 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
2992 sess_log(h2c->conn->owner);
2993 goto fail;
2994 }
2995 hdr.len--;
2996
2997 if (b_data(&h2c->dbuf) < 10)
2998 break; // missing padlen
2999
3000 padlen = *(uint8_t *)b_peek(&h2c->dbuf, 9);
3001
3002 if (padlen > hdr.len) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003003 TRACE_PROTO("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 +01003004 /* RFC7540#6.1 : pad length = length of
3005 * frame payload or greater => error.
3006 */
3007 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
3008 sess_log(h2c->conn->owner);
3009 goto fail;
3010 }
3011
3012 if (h2_ft_bit(hdr.ft) & H2_FT_FC_MASK) {
3013 h2c->rcvd_c++;
3014 h2c->rcvd_s++;
3015 }
3016 b_del(&h2c->dbuf, 1);
3017 }
3018 h2_skip_frame_hdr(&h2c->dbuf);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003019
3020 new_frame:
Willy Tarreau7e98c052017-10-10 15:56:59 +02003021 h2c->dfl = hdr.len;
3022 h2c->dsi = hdr.sid;
3023 h2c->dft = hdr.ft;
3024 h2c->dff = hdr.ff;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003025 h2c->dpl = padlen;
Willy Tarreau73db4342019-09-25 07:28:44 +02003026 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 +02003027 h2c->st0 = H2_CS_FRAME_P;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003028
3029 /* check for minimum basic frame format validity */
3030 ret = h2_frame_check(h2c->dft, 1, h2c->dsi, h2c->dfl, global.tune.bufsize);
3031 if (ret != H2_ERR_NO_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003032 TRACE_PROTO("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 +01003033 h2c_error(h2c, ret);
3034 sess_log(h2c->conn->owner);
3035 goto fail;
3036 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003037 }
3038
Willy Tarreau9fd5aa82019-08-06 15:21:45 +02003039 /* Only H2_CS_FRAME_P, H2_CS_FRAME_A and H2_CS_FRAME_E here.
3040 * H2_CS_FRAME_P indicates an incomplete previous operation
3041 * (most often the first attempt) and requires some validity
3042 * checks for the frame and the current state. The two other
3043 * ones are set after completion (or abortion) and must skip
3044 * validity checks.
3045 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003046 tmp_h2s = h2c_st_by_id(h2c, h2c->dsi);
3047
Willy Tarreau567beb82018-12-18 16:52:44 +01003048 if (tmp_h2s != h2s && h2s && h2s->cs &&
3049 (b_data(&h2s->rxbuf) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003050 conn_xprt_read0_pending(h2c->conn) ||
3051 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003052 (h2s->flags & H2_SF_ES_RCVD) ||
3053 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003054 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003055 TRACE_DEVEL("notifying stream before switching SID", H2_EV_RX_FRAME|H2_EV_STRM_WAKE, h2c->conn, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003056 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003057 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003058 }
3059 h2s = tmp_h2s;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003060
Willy Tarreau63864812019-08-07 14:25:20 +02003061 if (h2c->st0 == H2_CS_FRAME_E ||
Willy Tarreau7838a792019-08-12 18:42:03 +02003062 (h2c->st0 == H2_CS_FRAME_P && !h2_frame_check_vs_state(h2c, h2s))) {
3063 TRACE_PROTO("stream error reported", H2_EV_RX_FRAME|H2_EV_PROTO_ERR, h2c->conn, h2s);
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003064 goto strm_err;
Willy Tarreau7838a792019-08-12 18:42:03 +02003065 }
Willy Tarreauc0da1962017-10-30 18:38:00 +01003066
Willy Tarreau7e98c052017-10-10 15:56:59 +02003067 switch (h2c->dft) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02003068 case H2_FT_SETTINGS:
Willy Tarreau7838a792019-08-12 18:42:03 +02003069 if (h2c->st0 == H2_CS_FRAME_P) {
3070 TRACE_PROTO("receiving H2 SETTINGS frame", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn, h2s);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003071 ret = h2c_handle_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003072 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003073
Willy Tarreau7838a792019-08-12 18:42:03 +02003074 if (h2c->st0 == H2_CS_FRAME_A) {
3075 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 +02003076 ret = h2c_ack_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003077 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003078 break;
3079
Willy Tarreaucf68c782017-10-10 17:11:41 +02003080 case H2_FT_PING:
Willy Tarreau7838a792019-08-12 18:42:03 +02003081 if (h2c->st0 == H2_CS_FRAME_P) {
3082 TRACE_PROTO("receiving H2 PING frame", H2_EV_RX_FRAME|H2_EV_RX_PING, h2c->conn, h2s);
Willy Tarreaucf68c782017-10-10 17:11:41 +02003083 ret = h2c_handle_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003084 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003085
Willy Tarreau7838a792019-08-12 18:42:03 +02003086 if (h2c->st0 == H2_CS_FRAME_A) {
3087 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 +02003088 ret = h2c_ack_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003089 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003090 break;
3091
Willy Tarreau26f95952017-07-27 17:18:30 +02003092 case H2_FT_WINDOW_UPDATE:
Willy Tarreau7838a792019-08-12 18:42:03 +02003093 if (h2c->st0 == H2_CS_FRAME_P) {
3094 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 +02003095 ret = h2c_handle_window_update(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003096 }
Willy Tarreau26f95952017-07-27 17:18:30 +02003097 break;
3098
Willy Tarreau61290ec2017-10-17 08:19:21 +02003099 case H2_FT_CONTINUATION:
Willy Tarreauea18f862018-12-22 20:19:26 +01003100 /* RFC7540#6.10: CONTINUATION may only be preceeded by
3101 * a HEADERS/PUSH_PROMISE/CONTINUATION frame. These
3102 * frames' parsers consume all following CONTINUATION
3103 * frames so this one is out of sequence.
Willy Tarreau61290ec2017-10-17 08:19:21 +02003104 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003105 TRACE_PROTO("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 +01003106 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
3107 sess_log(h2c->conn->owner);
3108 goto fail;
Willy Tarreau61290ec2017-10-17 08:19:21 +02003109
Willy Tarreau13278b42017-10-13 19:23:14 +02003110 case H2_FT_HEADERS:
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003111 if (h2c->st0 == H2_CS_FRAME_P) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003112 TRACE_PROTO("receiving H2 HEADERS frame", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02003113 if (h2c->flags & H2_CF_IS_BACK)
3114 tmp_h2s = h2c_bck_handle_headers(h2c, h2s);
3115 else
3116 tmp_h2s = h2c_frt_handle_headers(h2c, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003117 if (tmp_h2s) {
3118 h2s = tmp_h2s;
3119 ret = 1;
3120 }
3121 }
Willy Tarreau13278b42017-10-13 19:23:14 +02003122 break;
3123
Willy Tarreau454f9052017-10-26 19:40:35 +02003124 case H2_FT_DATA:
Willy Tarreau7838a792019-08-12 18:42:03 +02003125 if (h2c->st0 == H2_CS_FRAME_P) {
3126 TRACE_PROTO("receiving H2 DATA frame", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02003127 ret = h2c_frt_handle_data(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003128 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003129
Willy Tarreau7838a792019-08-12 18:42:03 +02003130 if (h2c->st0 == H2_CS_FRAME_A) {
3131 TRACE_PROTO("sending stream WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02003132 ret = h2c_send_strm_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003133 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003134 break;
Willy Tarreaucd234e92017-08-18 10:59:39 +02003135
Willy Tarreau92153fc2017-12-03 19:46:19 +01003136 case H2_FT_PRIORITY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003137 if (h2c->st0 == H2_CS_FRAME_P) {
3138 TRACE_PROTO("receiving H2 PRIORITY frame", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn, h2s);
Willy Tarreau92153fc2017-12-03 19:46:19 +01003139 ret = h2c_handle_priority(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003140 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01003141 break;
3142
Willy Tarreaucd234e92017-08-18 10:59:39 +02003143 case H2_FT_RST_STREAM:
Willy Tarreau7838a792019-08-12 18:42:03 +02003144 if (h2c->st0 == H2_CS_FRAME_P) {
3145 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 +02003146 ret = h2c_handle_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003147 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02003148 break;
3149
Willy Tarreaue96b0922017-10-30 00:28:29 +01003150 case H2_FT_GOAWAY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003151 if (h2c->st0 == H2_CS_FRAME_P) {
3152 TRACE_PROTO("receiving H2 GOAWAY frame", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn, h2s);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003153 ret = h2c_handle_goaway(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003154 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01003155 break;
3156
Willy Tarreau1c661982017-10-30 13:52:01 +01003157 /* implement all extra frame types here */
Willy Tarreau7e98c052017-10-10 15:56:59 +02003158 default:
Willy Tarreau7838a792019-08-12 18:42:03 +02003159 TRACE_PROTO("receiving H2 ignored frame", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003160 /* drop frames that we ignore. They may be larger than
3161 * the buffer so we drain all of their contents until
3162 * we reach the end.
3163 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003164 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3165 b_del(&h2c->dbuf, ret);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003166 h2c->dfl -= ret;
3167 ret = h2c->dfl == 0;
3168 }
3169
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003170 strm_err:
Willy Tarreaua20a5192017-12-27 11:02:06 +01003171 /* We may have to send an RST if not done yet */
Willy Tarreau7838a792019-08-12 18:42:03 +02003172 if (h2s->st == H2_SS_ERROR) {
3173 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 +01003174 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003175 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003176
Willy Tarreau7838a792019-08-12 18:42:03 +02003177 if (h2c->st0 == H2_CS_FRAME_E) {
3178 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 +01003179 ret = h2c_send_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003180 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003181
Willy Tarreau7e98c052017-10-10 15:56:59 +02003182 /* error or missing data condition met above ? */
Willy Tarreau7838a792019-08-12 18:42:03 +02003183 if (ret <= 0) {
3184 TRACE_DEVEL("insufficient data to proceed", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003185 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003186 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003187
3188 if (h2c->st0 != H2_CS_FRAME_H) {
Christopher Faulet5112a602019-09-26 16:38:28 +02003189 TRACE_DEVEL("stream error, skip frame payload", H2_EV_RX_FRAME, h2c->conn, h2s);
3190 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3191 b_del(&h2c->dbuf, ret);
3192 h2c->dfl -= ret;
3193 if (!h2c->dfl) {
3194 TRACE_STATE("switching to FRAME_H", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
3195 h2c->st0 = H2_CS_FRAME_H;
3196 h2c->dsi = -1;
3197 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003198 }
3199 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003200
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003201 if (h2c->rcvd_c > 0 &&
Willy Tarreau7838a792019-08-12 18:42:03 +02003202 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))) {
3203 TRACE_PROTO("sending H2 WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003204 h2c_send_conn_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003205 }
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003206
Willy Tarreau52eed752017-09-22 15:05:09 +02003207 fail:
3208 /* we can go here on missing data, blocked response or error */
Willy Tarreau567beb82018-12-18 16:52:44 +01003209 if (h2s && h2s->cs &&
3210 (b_data(&h2s->rxbuf) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003211 conn_xprt_read0_pending(h2c->conn) ||
3212 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003213 (h2s->flags & H2_SF_ES_RCVD) ||
3214 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003215 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003216 TRACE_DEVEL("notifying stream before switching SID", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003217 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003218 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003219 }
Willy Tarreau1ed87b72018-11-25 08:45:16 +01003220
Willy Tarreau7838a792019-08-12 18:42:03 +02003221 if (old_iw != h2c->miw) {
3222 TRACE_STATE("notifying streams about SFCTL increase", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003223 h2c_unblock_sfctl(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003224 }
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003225
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003226 h2c_restart_reading(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02003227 out:
3228 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreaubc933932017-10-09 16:21:43 +02003229}
3230
3231/* process Tx frames from streams to be multiplexed. Returns > 0 if it reached
3232 * the end.
3233 */
3234static int h2_process_mux(struct h2c *h2c)
3235{
Olivier Houchard998410a2019-04-15 19:23:37 +02003236 struct h2s *h2s, *h2s_back;
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003237
Willy Tarreau7838a792019-08-12 18:42:03 +02003238 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3239
Willy Tarreau01b44822018-10-03 14:26:37 +02003240 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3241 if (unlikely(h2c->st0 == H2_CS_PREFACE && (h2c->flags & H2_CF_IS_BACK))) {
3242 if (unlikely(h2c_bck_send_preface(h2c) <= 0)) {
3243 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
3244 if (h2c->st0 == H2_CS_ERROR) {
3245 h2c->st0 = H2_CS_ERROR2;
3246 sess_log(h2c->conn->owner);
3247 }
3248 goto fail;
3249 }
3250 h2c->st0 = H2_CS_SETTINGS1;
3251 }
3252 /* need to wait for the other side */
Willy Tarreau75a930a2018-12-12 08:03:58 +01003253 if (h2c->st0 < H2_CS_FRAME_H)
Willy Tarreau7838a792019-08-12 18:42:03 +02003254 goto done;
Willy Tarreau01b44822018-10-03 14:26:37 +02003255 }
3256
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003257 /* start by sending possibly pending window updates */
Willy Tarreaue74679a2019-08-06 15:39:32 +02003258 if (h2c->rcvd_s > 0 &&
3259 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3260 h2c_send_strm_wu(h2c) < 0)
3261 goto fail;
3262
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003263 if (h2c->rcvd_c > 0 &&
3264 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3265 h2c_send_conn_wu(h2c) < 0)
3266 goto fail;
3267
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003268 /* First we always process the flow control list because the streams
3269 * waiting there were already elected for immediate emission but were
3270 * blocked just on this.
3271 */
3272
Olivier Houchard998410a2019-04-15 19:23:37 +02003273 list_for_each_entry_safe(h2s, h2s_back, &h2c->fctl_list, list) {
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003274 if (h2c->mws <= 0 || h2c->flags & H2_CF_MUX_BLOCK_ANY ||
3275 h2c->st0 >= H2_CS_ERROR)
3276 break;
Olivier Houchard998410a2019-04-15 19:23:37 +02003277
Willy Tarreauc234ae32019-05-13 17:56:11 +02003278 if (LIST_ADDED(&h2s->sending_list))
Olivier Houchardd360ac62019-03-22 17:37:16 +01003279 continue;
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003280
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003281 h2s->flags &= ~H2_SF_BLK_ANY;
Olivier Houchard998410a2019-04-15 19:23:37 +02003282 /* For some reason, the upper layer failed to subsribe again,
3283 * so remove it from the send_list
3284 */
3285 if (!h2s->send_wait) {
3286 LIST_DEL_INIT(&h2s->list);
3287 continue;
3288 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003289 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Olivier Houchardd360ac62019-03-22 17:37:16 +01003290 LIST_ADDQ(&h2c->sending_list, &h2s->sending_list);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003291 tasklet_wakeup(h2s->send_wait->tasklet);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003292 }
3293
Olivier Houchard998410a2019-04-15 19:23:37 +02003294 list_for_each_entry_safe(h2s, h2s_back, &h2c->send_list, list) {
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003295 if (h2c->st0 >= H2_CS_ERROR || h2c->flags & H2_CF_MUX_BLOCK_ANY)
3296 break;
Olivier Houchard998410a2019-04-15 19:23:37 +02003297
Willy Tarreauc234ae32019-05-13 17:56:11 +02003298 if (LIST_ADDED(&h2s->sending_list))
Olivier Houchardd360ac62019-03-22 17:37:16 +01003299 continue;
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003300
Olivier Houchard998410a2019-04-15 19:23:37 +02003301 /* For some reason, the upper layer failed to subsribe again,
3302 * so remove it from the send_list
3303 */
3304 if (!h2s->send_wait) {
3305 LIST_DEL_INIT(&h2s->list);
3306 continue;
3307 }
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003308 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003309 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Olivier Houchardd360ac62019-03-22 17:37:16 +01003310 LIST_ADDQ(&h2c->sending_list, &h2s->sending_list);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003311 tasklet_wakeup(h2s->send_wait->tasklet);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003312 }
3313
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003314 fail:
Willy Tarreau3eabe9b2017-11-07 11:03:01 +01003315 if (unlikely(h2c->st0 >= H2_CS_ERROR)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02003316 if (h2c->st0 == H2_CS_ERROR) {
3317 if (h2c->max_id >= 0) {
3318 h2c_send_goaway_error(h2c, NULL);
3319 if (h2c->flags & H2_CF_MUX_BLOCK_ANY)
Willy Tarreau7838a792019-08-12 18:42:03 +02003320 goto out0;
Willy Tarreau081d4722017-05-16 21:51:05 +02003321 }
3322
3323 h2c->st0 = H2_CS_ERROR2; // sent (or failed hard) !
3324 }
Willy Tarreau081d4722017-05-16 21:51:05 +02003325 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003326 done:
3327 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
3328 return 1;
3329 out0:
3330 TRACE_DEVEL("leaving in blocked situation", H2_EV_H2C_WAKE, h2c->conn);
3331 return 0;
Willy Tarreaubc933932017-10-09 16:21:43 +02003332}
3333
Willy Tarreau62f52692017-10-08 23:01:42 +02003334
Willy Tarreau479998a2018-11-18 06:30:59 +01003335/* Attempt to read data, and subscribe if none available.
3336 * The function returns 1 if data has been received, otherwise zero.
3337 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003338static int h2_recv(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003339{
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003340 struct connection *conn = h2c->conn;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003341 struct buffer *buf;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003342 int max;
Olivier Houchard7505f942018-08-21 18:10:44 +02003343 size_t ret;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003344
Willy Tarreau7838a792019-08-12 18:42:03 +02003345 TRACE_ENTER(H2_EV_H2C_RECV, h2c->conn);
3346
3347 if (h2c->wait_event.events & SUB_RETRY_RECV) {
3348 TRACE_DEVEL("leaving on sub_recv", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003349 return (b_data(&h2c->dbuf));
Willy Tarreau7838a792019-08-12 18:42:03 +02003350 }
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003351
Willy Tarreau7838a792019-08-12 18:42:03 +02003352 if (!h2_recv_allowed(h2c)) {
3353 TRACE_DEVEL("leaving on !recv_allowed", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003354 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003355 }
Willy Tarreaua2af5122017-10-09 11:56:46 +02003356
Willy Tarreau44e973f2018-03-01 17:49:30 +01003357 buf = h2_get_buf(h2c, &h2c->dbuf);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003358 if (!buf) {
3359 h2c->flags |= H2_CF_DEM_DALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02003360 TRACE_DEVEL("leaving on !alloc", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003361 return 0;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003362 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003363
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003364 b_realign_if_empty(buf);
3365 if (!b_data(buf)) {
3366 /* try to pre-align the buffer like the
3367 * rxbufs will be to optimize memory copies. We'll make
3368 * sure that the frame header lands at the end of the
3369 * HTX block to alias it upon recv. We cannot use the
3370 * head because rcv_buf() will realign the buffer if
3371 * it's empty. Thus we cheat and pretend we already
3372 * have a few bytes there.
3373 */
3374 max = buf_room_for_htx_data(buf) + 9;
3375 buf->head = sizeof(struct htx) - 9;
3376 }
3377 else
3378 max = b_room(buf);
Willy Tarreau2a59e872018-12-12 08:23:47 +01003379
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003380 ret = max ? conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0) : 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003381
Willy Tarreau7838a792019-08-12 18:42:03 +02003382 if (max && !ret && h2_recv_allowed(h2c)) {
3383 TRACE_DATA("failed to receive data, subscribing", H2_EV_H2C_RECV, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003384 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003385 } else if (ret)
3386 TRACE_DATA("received data", H2_EV_H2C_RECV, h2c->conn,,, (void*)(long)ret);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003387
Olivier Houcharda1411e62018-08-17 18:42:48 +02003388 if (!b_data(buf)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +01003389 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02003390 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard46677732018-11-29 17:06:17 +01003391 return (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003392 }
3393
Willy Tarreau7838a792019-08-12 18:42:03 +02003394 if (b_data(buf) == buf->size) {
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003395 h2c->flags |= H2_CF_DEM_DFULL;
Willy Tarreau35fb8462019-10-02 11:05:46 +02003396 TRACE_STATE("demux buffer full", H2_EV_H2C_RECV|H2_EV_H2C_BLK, h2c->conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003397 }
3398
3399 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003400 return !!ret || (conn->flags & CO_FL_ERROR) || conn_xprt_read0_pending(conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003401}
3402
Willy Tarreau479998a2018-11-18 06:30:59 +01003403/* Try to send data if possible.
3404 * The function returns 1 if data have been sent, otherwise zero.
3405 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003406static int h2_send(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003407{
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003408 struct connection *conn = h2c->conn;
Willy Tarreaubc933932017-10-09 16:21:43 +02003409 int done;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003410 int sent = 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003411
Willy Tarreau7838a792019-08-12 18:42:03 +02003412 TRACE_ENTER(H2_EV_H2C_SEND, h2c->conn);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003413
Willy Tarreau7838a792019-08-12 18:42:03 +02003414 if (conn->flags & CO_FL_ERROR) {
3415 TRACE_DEVEL("leaving on error", H2_EV_H2C_SEND, h2c->conn);
3416 return 1;
3417 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003418
Willy Tarreaua2af5122017-10-09 11:56:46 +02003419 if (conn->flags & (CO_FL_HANDSHAKE|CO_FL_WAIT_L4_CONN|CO_FL_WAIT_L6_CONN)) {
3420 /* a handshake was requested */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003421 goto schedule;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003422 }
3423
Willy Tarreaubc933932017-10-09 16:21:43 +02003424 /* This loop is quite simple : it tries to fill as much as it can from
3425 * pending streams into the existing buffer until it's reportedly full
3426 * or the end of send requests is reached. Then it tries to send this
3427 * buffer's contents out, marks it not full if at least one byte could
3428 * be sent, and tries again.
3429 *
3430 * The snd_buf() function normally takes a "flags" argument which may
3431 * be made of a combination of CO_SFL_MSG_MORE to indicate that more
3432 * data immediately comes and CO_SFL_STREAMER to indicate that the
3433 * connection is streaming lots of data (used to increase TLS record
3434 * size at the expense of latency). The former can be sent any time
3435 * there's a buffer full flag, as it indicates at least one stream
3436 * attempted to send and failed so there are pending data. An
3437 * alternative would be to set it as long as there's an active stream
3438 * but that would be problematic for ACKs until we have an absolute
3439 * guarantee that all waiters have at least one byte to send. The
3440 * latter should possibly not be set for now.
3441 */
3442
3443 done = 0;
3444 while (!done) {
3445 unsigned int flags = 0;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003446 unsigned int released = 0;
3447 struct buffer *buf;
Willy Tarreaubc933932017-10-09 16:21:43 +02003448
3449 /* fill as much as we can into the current buffer */
3450 while (((h2c->flags & (H2_CF_MUX_MFULL|H2_CF_MUX_MALLOC)) == 0) && !done)
3451 done = h2_process_mux(h2c);
3452
Olivier Houchard2b094432019-01-29 18:28:36 +01003453 if (h2c->flags & H2_CF_MUX_MALLOC)
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003454 done = 1; // we won't go further without extra buffers
Olivier Houchard2b094432019-01-29 18:28:36 +01003455
Willy Tarreaubc933932017-10-09 16:21:43 +02003456 if (conn->flags & CO_FL_ERROR)
3457 break;
3458
3459 if (h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))
3460 flags |= CO_SFL_MSG_MORE;
3461
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003462 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3463 if (b_data(buf)) {
3464 int ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, buf, b_data(buf), flags);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003465 if (!ret) {
3466 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003467 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003468 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003469 sent = 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003470 TRACE_DATA("sent data", H2_EV_H2C_SEND, h2c->conn,, buf, (void*)(long)ret);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003471 b_del(buf, ret);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003472 if (b_data(buf)) {
3473 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003474 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003475 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003476 }
3477 b_free(buf);
3478 released++;
Willy Tarreau787db9a2018-06-14 18:31:46 +02003479 }
Willy Tarreaubc933932017-10-09 16:21:43 +02003480
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003481 if (released)
Willy Tarreau201840a2019-05-29 17:50:48 +02003482 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003483
Willy Tarreaubc933932017-10-09 16:21:43 +02003484 /* wrote at least one byte, the buffer is not full anymore */
3485 h2c->flags &= ~(H2_CF_MUX_MFULL | H2_CF_DEM_MROOM);
3486 }
3487
Willy Tarreaua2af5122017-10-09 11:56:46 +02003488 if (conn->flags & CO_FL_SOCK_WR_SH) {
3489 /* output closed, nothing to send, clear the buffer to release it */
Willy Tarreau51330962019-05-26 09:38:07 +02003490 b_reset(br_tail(h2c->mbuf));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003491 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02003492 /* We're not full anymore, so we can wake any task that are waiting
3493 * for us.
3494 */
Willy Tarreaucec60052019-09-25 07:57:31 +02003495 if (!(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM)) && h2c->st0 >= H2_CS_FRAME_H) {
Olivier Houchardd360ac62019-03-22 17:37:16 +01003496 struct h2s *h2s;
3497
3498 list_for_each_entry(h2s, &h2c->send_list, list) {
3499 if (h2c->st0 >= H2_CS_ERROR || h2c->flags & H2_CF_MUX_BLOCK_ANY)
3500 break;
Olivier Houchard998410a2019-04-15 19:23:37 +02003501
Willy Tarreauc234ae32019-05-13 17:56:11 +02003502 if (LIST_ADDED(&h2s->sending_list))
Olivier Houchardd360ac62019-03-22 17:37:16 +01003503 continue;
3504
Olivier Houchard998410a2019-04-15 19:23:37 +02003505 /* For some reason, the upper layer failed to subsribe again,
3506 * so remove it from the send_list
3507 */
3508 if (!h2s->send_wait) {
3509 LIST_DEL_INIT(&h2s->list);
3510 continue;
3511 }
Olivier Houchardd360ac62019-03-22 17:37:16 +01003512 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003513 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Willy Tarreau7838a792019-08-12 18:42:03 +02003514 TRACE_DEVEL("waking up pending stream", H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn, h2s);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003515 tasklet_wakeup(h2s->send_wait->tasklet);
Olivier Houchardd360ac62019-03-22 17:37:16 +01003516 LIST_ADDQ(&h2c->sending_list, &h2s->sending_list);
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02003517 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02003518 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003519 /* We're done, no more to send */
Willy Tarreau7838a792019-08-12 18:42:03 +02003520 if (!br_data(h2c->mbuf)) {
3521 TRACE_DEVEL("leaving with everything sent", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003522 return sent;
Willy Tarreau7838a792019-08-12 18:42:03 +02003523 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003524schedule:
Willy Tarreau7838a792019-08-12 18:42:03 +02003525 if (!(conn->flags & CO_FL_ERROR) && !(h2c->wait_event.events & SUB_RETRY_SEND)) {
3526 TRACE_STATE("more data to send, subscribing", H2_EV_H2C_SEND, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003527 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003528 }
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003529
Willy Tarreau7838a792019-08-12 18:42:03 +02003530 TRACE_DEVEL("leaving with some data left to send", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003531 return sent;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003532}
3533
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003534/* this is the tasklet referenced in h2c->wait_event.tasklet */
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003535static struct task *h2_io_cb(struct task *t, void *ctx, unsigned short status)
3536{
3537 struct h2c *h2c = ctx;
Olivier Houchard7505f942018-08-21 18:10:44 +02003538 int ret = 0;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003539
Willy Tarreau7838a792019-08-12 18:42:03 +02003540 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3541
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003542 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchard7505f942018-08-21 18:10:44 +02003543 ret = h2_send(h2c);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003544 if (!(h2c->wait_event.events & SUB_RETRY_RECV))
Olivier Houchard7505f942018-08-21 18:10:44 +02003545 ret |= h2_recv(h2c);
Willy Tarreaucef5c8e2018-12-18 10:29:54 +01003546 if (ret || b_data(&h2c->dbuf))
Olivier Houchard7505f942018-08-21 18:10:44 +02003547 h2_process(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003548
3549 TRACE_LEAVE(H2_EV_H2C_WAKE);
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003550 return NULL;
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003551}
Willy Tarreaua2af5122017-10-09 11:56:46 +02003552
Willy Tarreau62f52692017-10-08 23:01:42 +02003553/* callback called on any event by the connection handler.
3554 * It applies changes and returns zero, or < 0 if it wants immediate
3555 * destruction of the connection (which normally doesn not happen in h2).
3556 */
Olivier Houchard7505f942018-08-21 18:10:44 +02003557static int h2_process(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003558{
Olivier Houchard7505f942018-08-21 18:10:44 +02003559 struct connection *conn = h2c->conn;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003560
Willy Tarreau7838a792019-08-12 18:42:03 +02003561 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3562
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003563 if (b_data(&h2c->dbuf) && !(h2c->flags & H2_CF_DEM_BLOCK_ANY)) {
Willy Tarreaud13bf272017-12-14 10:34:52 +01003564 h2_process_demux(h2c);
3565
3566 if (h2c->st0 >= H2_CS_ERROR || conn->flags & CO_FL_ERROR)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003567 b_reset(&h2c->dbuf);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003568
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003569 if (!b_full(&h2c->dbuf))
Willy Tarreaud13bf272017-12-14 10:34:52 +01003570 h2c->flags &= ~H2_CF_DEM_DFULL;
3571 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003572 h2_send(h2c);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003573
Willy Tarreau0b37d652018-10-03 10:33:02 +02003574 if (unlikely(h2c->proxy->state == PR_STSTOPPED)) {
Willy Tarreau8ec14062017-12-30 18:08:13 +01003575 /* frontend is stopping, reload likely in progress, let's try
3576 * to announce a graceful shutdown if not yet done. We don't
3577 * care if it fails, it will be tried again later.
3578 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003579 TRACE_STATE("proxy stopped, sending GOAWAY", H2_EV_H2C_WAKE|H2_EV_TX_FRAME, conn);
Willy Tarreau8ec14062017-12-30 18:08:13 +01003580 if (!(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
3581 if (h2c->last_sid < 0)
3582 h2c->last_sid = (1U << 31) - 1;
3583 h2c_send_goaway_error(h2c, NULL);
3584 }
3585 }
3586
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003587 /*
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003588 * If we received early data, and the handshake is done, wake
3589 * any stream that was waiting for it.
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003590 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003591 if (!(h2c->flags & H2_CF_WAIT_FOR_HS) &&
3592 (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_HANDSHAKE | CO_FL_EARLY_DATA)) == CO_FL_EARLY_DATA) {
3593 struct eb32_node *node;
3594 struct h2s *h2s;
3595
3596 h2c->flags |= H2_CF_WAIT_FOR_HS;
3597 node = eb32_lookup_ge(&h2c->streams_by_id, 1);
3598
3599 while (node) {
3600 h2s = container_of(node, struct h2s, by_id);
Willy Tarreaufde287c2018-12-19 18:33:16 +01003601 if (h2s->cs && h2s->cs->flags & CS_FL_WAIT_FOR_HS)
Willy Tarreau7e094452018-12-19 18:08:52 +01003602 h2s_notify_recv(h2s);
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003603 node = eb32_next(node);
3604 }
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003605 }
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003606
Willy Tarreau26bd7612017-10-09 16:47:04 +02003607 if (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn) ||
Willy Tarreau29a98242017-10-31 06:59:15 +01003608 h2c->st0 == H2_CS_ERROR2 || h2c->flags & H2_CF_GOAWAY_FAILED ||
3609 (eb_is_empty(&h2c->streams_by_id) && h2c->last_sid >= 0 &&
3610 h2c->max_id >= h2c->last_sid)) {
Willy Tarreau23482912019-05-07 15:23:14 +02003611 h2_wake_some_streams(h2c, 0);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003612
3613 if (eb_is_empty(&h2c->streams_by_id)) {
3614 /* no more stream, kill the connection now */
Christopher Faulet73c12072019-04-08 11:23:22 +02003615 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003616 TRACE_DEVEL("leaving after releasing the connection", H2_EV_H2C_WAKE);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003617 return -1;
3618 }
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003619 }
3620
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003621 if (!b_data(&h2c->dbuf))
Willy Tarreau44e973f2018-03-01 17:49:30 +01003622 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003623
Olivier Houchard53216e72018-10-10 15:46:36 +02003624 if ((conn->flags & CO_FL_SOCK_WR_SH) ||
3625 h2c->st0 == H2_CS_ERROR2 || (h2c->flags & H2_CF_GOAWAY_FAILED) ||
3626 (h2c->st0 != H2_CS_ERROR &&
Willy Tarreau662fafc2019-05-26 09:43:07 +02003627 !br_data(h2c->mbuf) &&
Olivier Houchard53216e72018-10-10 15:46:36 +02003628 (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) &&
3629 ((h2c->flags & H2_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&h2c->send_list))))
Willy Tarreau2e3c0002019-05-26 09:45:23 +02003630 h2_release_mbuf(h2c);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003631
Willy Tarreau3f133572017-10-31 19:21:06 +01003632 if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02003633 if (h2c_may_expire(h2c))
3634 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
3635 else
3636 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02003637 task_queue(h2c->task);
Willy Tarreauea392822017-10-31 10:02:25 +01003638 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003639
Olivier Houchard7505f942018-08-21 18:10:44 +02003640 h2_send(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003641 TRACE_LEAVE(H2_EV_H2C_WAKE, conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003642 return 0;
3643}
3644
Willy Tarreau749f5ca2019-03-21 19:19:36 +01003645/* wake-up function called by the connection layer (mux_ops.wake) */
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003646static int h2_wake(struct connection *conn)
3647{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003648 struct h2c *h2c = conn->ctx;
Willy Tarreau7838a792019-08-12 18:42:03 +02003649 int ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003650
Willy Tarreau7838a792019-08-12 18:42:03 +02003651 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3652 ret = h2_process(h2c);
3653 TRACE_LEAVE(H2_EV_H2C_WAKE);
3654 return ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003655}
3656
Willy Tarreauea392822017-10-31 10:02:25 +01003657/* Connection timeout management. The principle is that if there's no receipt
3658 * nor sending for a certain amount of time, the connection is closed. If the
3659 * MUX buffer still has lying data or is not allocatable, the connection is
3660 * immediately killed. If it's allocatable and empty, we attempt to send a
3661 * GOAWAY frame.
3662 */
Olivier Houchard9f6af332018-05-25 14:04:04 +02003663static struct task *h2_timeout_task(struct task *t, void *context, unsigned short state)
Willy Tarreauea392822017-10-31 10:02:25 +01003664{
Olivier Houchard9f6af332018-05-25 14:04:04 +02003665 struct h2c *h2c = context;
Willy Tarreauea392822017-10-31 10:02:25 +01003666 int expired = tick_is_expired(t->expire, now_ms);
3667
Willy Tarreau7838a792019-08-12 18:42:03 +02003668 TRACE_ENTER(H2_EV_H2C_WAKE, h2c ? h2c->conn : NULL);
3669
3670 if (!expired && h2c) {
3671 TRACE_DEVEL("leaving (not expired)", H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreauea392822017-10-31 10:02:25 +01003672 return t;
Willy Tarreau7838a792019-08-12 18:42:03 +02003673 }
Willy Tarreauea392822017-10-31 10:02:25 +01003674
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02003675 if (h2c && !h2c_may_expire(h2c)) {
3676 /* we do still have streams but all of them are idle, waiting
3677 * for the data layer, so we must not enforce the timeout here.
3678 */
3679 t->expire = TICK_ETERNITY;
3680 return t;
3681 }
3682
Olivier Houchard3f795f72019-04-17 22:51:06 +02003683 task_destroy(t);
Willy Tarreau0975f112018-03-29 15:22:59 +02003684
3685 if (!h2c) {
3686 /* resources were already deleted */
Willy Tarreau7838a792019-08-12 18:42:03 +02003687 TRACE_DEVEL("leaving (not more h2c)", H2_EV_H2C_WAKE);
Willy Tarreau0975f112018-03-29 15:22:59 +02003688 return NULL;
3689 }
3690
3691 h2c->task = NULL;
Willy Tarreauea392822017-10-31 10:02:25 +01003692 h2c_error(h2c, H2_ERR_NO_ERROR);
Willy Tarreau23482912019-05-07 15:23:14 +02003693 h2_wake_some_streams(h2c, 0);
Willy Tarreauea392822017-10-31 10:02:25 +01003694
Willy Tarreau662fafc2019-05-26 09:43:07 +02003695 if (br_data(h2c->mbuf)) {
Willy Tarreauea392822017-10-31 10:02:25 +01003696 /* don't even try to send a GOAWAY, the buffer is stuck */
3697 h2c->flags |= H2_CF_GOAWAY_FAILED;
3698 }
3699
3700 /* try to send but no need to insist */
Willy Tarreau599391a2017-11-24 10:16:00 +01003701 h2c->last_sid = h2c->max_id;
Willy Tarreauea392822017-10-31 10:02:25 +01003702 if (h2c_send_goaway_error(h2c, NULL) <= 0)
3703 h2c->flags |= H2_CF_GOAWAY_FAILED;
3704
Willy Tarreau662fafc2019-05-26 09:43:07 +02003705 if (br_data(h2c->mbuf) && !(h2c->flags & H2_CF_GOAWAY_FAILED) && conn_xprt_ready(h2c->conn)) {
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003706 unsigned int released = 0;
3707 struct buffer *buf;
3708
3709 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3710 if (b_data(buf)) {
3711 int ret = h2c->conn->xprt->snd_buf(h2c->conn, h2c->conn->xprt_ctx, buf, b_data(buf), 0);
3712 if (!ret)
3713 break;
3714 b_del(buf, ret);
3715 if (b_data(buf))
3716 break;
3717 b_free(buf);
3718 released++;
3719 }
Willy Tarreau787db9a2018-06-14 18:31:46 +02003720 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003721
3722 if (released)
Willy Tarreau201840a2019-05-29 17:50:48 +02003723 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau787db9a2018-06-14 18:31:46 +02003724 }
Willy Tarreauea392822017-10-31 10:02:25 +01003725
Willy Tarreau0975f112018-03-29 15:22:59 +02003726 /* either we can release everything now or it will be done later once
3727 * the last stream closes.
3728 */
3729 if (eb_is_empty(&h2c->streams_by_id))
Christopher Faulet73c12072019-04-08 11:23:22 +02003730 h2_release(h2c);
Willy Tarreauea392822017-10-31 10:02:25 +01003731
Willy Tarreau7838a792019-08-12 18:42:03 +02003732 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreauea392822017-10-31 10:02:25 +01003733 return NULL;
3734}
3735
3736
Willy Tarreau62f52692017-10-08 23:01:42 +02003737/*******************************************/
3738/* functions below are used by the streams */
3739/*******************************************/
3740
3741/*
3742 * Attach a new stream to a connection
3743 * (Used for outgoing connections)
3744 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01003745static struct conn_stream *h2_attach(struct connection *conn, struct session *sess)
Willy Tarreau62f52692017-10-08 23:01:42 +02003746{
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003747 struct conn_stream *cs;
3748 struct h2s *h2s;
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003749 struct h2c *h2c = conn->ctx;
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003750
Willy Tarreau7838a792019-08-12 18:42:03 +02003751 TRACE_ENTER(H2_EV_H2S_NEW, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003752 cs = cs_new(conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003753 if (!cs) {
3754 TRACE_DEVEL("leaving on CS allocation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003755 return NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02003756 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01003757 h2s = h2c_bck_stream_new(h2c, cs, sess);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003758 if (!h2s) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003759 TRACE_DEVEL("leaving on stream creation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003760 cs_free(cs);
3761 return NULL;
3762 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003763 TRACE_LEAVE(H2_EV_H2S_NEW, conn, h2s);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003764 return cs;
Willy Tarreau62f52692017-10-08 23:01:42 +02003765}
3766
Willy Tarreaufafd3982018-11-18 21:29:20 +01003767/* Retrieves the first valid conn_stream from this connection, or returns NULL.
3768 * We have to scan because we may have some orphan streams. It might be
3769 * beneficial to scan backwards from the end to reduce the likeliness to find
3770 * orphans.
3771 */
3772static const struct conn_stream *h2_get_first_cs(const struct connection *conn)
3773{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003774 struct h2c *h2c = conn->ctx;
Willy Tarreaufafd3982018-11-18 21:29:20 +01003775 struct h2s *h2s;
3776 struct eb32_node *node;
3777
3778 node = eb32_first(&h2c->streams_by_id);
3779 while (node) {
3780 h2s = container_of(node, struct h2s, by_id);
3781 if (h2s->cs)
3782 return h2s->cs;
3783 node = eb32_next(node);
3784 }
3785 return NULL;
3786}
3787
Willy Tarreau62f52692017-10-08 23:01:42 +02003788/*
Olivier Houchard060ed432018-11-06 16:32:42 +01003789 * Destroy the mux and the associated connection, if it is no longer used
3790 */
Christopher Faulet73c12072019-04-08 11:23:22 +02003791static void h2_destroy(void *ctx)
Olivier Houchard060ed432018-11-06 16:32:42 +01003792{
Christopher Faulet73c12072019-04-08 11:23:22 +02003793 struct h2c *h2c = ctx;
Olivier Houchard060ed432018-11-06 16:32:42 +01003794
Willy Tarreau7838a792019-08-12 18:42:03 +02003795 TRACE_ENTER(H2_EV_H2C_END, h2c->conn);
Christopher Faulet39a96ee2019-04-08 10:52:21 +02003796 if (eb_is_empty(&h2c->streams_by_id) || !h2c->conn || h2c->conn->ctx != h2c)
Christopher Faulet73c12072019-04-08 11:23:22 +02003797 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003798 TRACE_LEAVE(H2_EV_H2C_END);
Olivier Houchard060ed432018-11-06 16:32:42 +01003799}
3800
3801/*
Willy Tarreau62f52692017-10-08 23:01:42 +02003802 * Detach the stream from the connection and possibly release the connection.
3803 */
3804static void h2_detach(struct conn_stream *cs)
3805{
Willy Tarreau60935142017-10-16 18:11:19 +02003806 struct h2s *h2s = cs->ctx;
3807 struct h2c *h2c;
Olivier Houchardf502aca2018-12-14 19:42:40 +01003808 struct session *sess;
Willy Tarreau60935142017-10-16 18:11:19 +02003809
Willy Tarreau7838a792019-08-12 18:42:03 +02003810 TRACE_ENTER(H2_EV_STRM_END, h2s ? h2s->h2c->conn : NULL, h2s);
3811
Willy Tarreau60935142017-10-16 18:11:19 +02003812 cs->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02003813 if (!h2s) {
3814 TRACE_LEAVE(H2_EV_STRM_END);
Willy Tarreau60935142017-10-16 18:11:19 +02003815 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02003816 }
Willy Tarreau60935142017-10-16 18:11:19 +02003817
Olivier Houchard998410a2019-04-15 19:23:37 +02003818 /* The stream is about to die, so no need to attempt to run its task */
Willy Tarreauc234ae32019-05-13 17:56:11 +02003819 if (LIST_ADDED(&h2s->sending_list) &&
Olivier Houchard998410a2019-04-15 19:23:37 +02003820 h2s->send_wait != &h2s->wait_event) {
Olivier Houchard5a3671d2019-10-11 16:33:49 +02003821 /*
3822 * Calling tasklet_remove_from_tasklet_list() here is fine,
3823 * as only the thread responsible for the tasklet should
3824 * call h2_detach().
3825 */
Willy Tarreau86eded62019-06-14 14:47:49 +02003826 tasklet_remove_from_tasklet_list(h2s->send_wait->tasklet);
Olivier Houchard998410a2019-04-15 19:23:37 +02003827 LIST_DEL_INIT(&h2s->sending_list);
Olivier Houchardd9986ed2019-05-09 13:24:08 +02003828 /*
3829 * At this point, the stream_interface is supposed to have called
3830 * h2_unsubscribe(), so the only way there's still a
3831 * subscription that came from the stream_interface (as we
3832 * can subscribe ourself, in h2_do_shutw() and h2_do_shutr(),
3833 * without the stream_interface involved) is that we subscribed
3834 * for sending, we woke the tasklet up and removed the
3835 * SUB_RETRY_SEND flag, so the stream_interface would not
3836 * know it has to unsubscribe for send, but the tasklet hasn't
3837 * run yet. Make sure to handle that by explicitely setting
3838 * send_wait to NULL, as nothing else will do it for us.
3839 */
3840 h2s->send_wait = NULL;
Olivier Houchard998410a2019-04-15 19:23:37 +02003841 }
3842
Olivier Houchardf502aca2018-12-14 19:42:40 +01003843 sess = h2s->sess;
Willy Tarreau60935142017-10-16 18:11:19 +02003844 h2c = h2s->h2c;
3845 h2s->cs = NULL;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02003846 h2c->nb_cs--;
Willy Tarreaufa1d3572019-01-31 10:31:51 +01003847 if ((h2c->flags & (H2_CF_IS_BACK|H2_CF_DEM_TOOMANY)) == H2_CF_DEM_TOOMANY &&
3848 !h2_frt_has_too_many_cs(h2c)) {
3849 /* frontend connection was blocking new streams creation */
Willy Tarreauf2101912018-07-19 10:11:38 +02003850 h2c->flags &= ~H2_CF_DEM_TOOMANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003851 h2c_restart_reading(h2c, 1);
Willy Tarreauf2101912018-07-19 10:11:38 +02003852 }
Willy Tarreau60935142017-10-16 18:11:19 +02003853
Willy Tarreau22cf59b2017-11-10 11:42:33 +01003854 /* this stream may be blocked waiting for some data to leave (possibly
3855 * an ES or RST frame), so orphan it in this case.
3856 */
Willy Tarreau3041fcc2018-03-29 15:41:32 +02003857 if (!(cs->conn->flags & CO_FL_ERROR) &&
Willy Tarreaua2b51812018-07-27 09:55:14 +02003858 (h2c->st0 < H2_CS_ERROR) &&
Willy Tarreau7838a792019-08-12 18:42:03 +02003859 (h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL)) && (h2s->send_wait || h2s->recv_wait)) {
3860 TRACE_DEVEL("leaving on stream blocked", H2_EV_STRM_END|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau22cf59b2017-11-10 11:42:33 +01003861 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02003862 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01003863
Willy Tarreau45f752e2017-10-30 15:44:59 +01003864 if ((h2c->flags & H2_CF_DEM_BLOCK_ANY && h2s->id == h2c->dsi) ||
3865 (h2c->flags & H2_CF_MUX_BLOCK_ANY && h2s->id == h2c->msi)) {
3866 /* unblock the connection if it was blocked on this
3867 * stream.
3868 */
3869 h2c->flags &= ~H2_CF_DEM_BLOCK_ANY;
3870 h2c->flags &= ~H2_CF_MUX_BLOCK_ANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003871 h2c_restart_reading(h2c, 1);
Willy Tarreau45f752e2017-10-30 15:44:59 +01003872 }
3873
Willy Tarreau71049cc2018-03-28 13:56:39 +02003874 h2s_destroy(h2s);
Willy Tarreau60935142017-10-16 18:11:19 +02003875
Christopher Faulet9b79a102019-07-15 11:22:56 +02003876 if (h2c->flags & H2_CF_IS_BACK) {
Olivier Houchard8a786902018-12-15 16:05:40 +01003877 if (!(h2c->conn->flags &
3878 (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH))) {
3879 if (!h2c->conn->owner) {
Olivier Houchardf502aca2018-12-14 19:42:40 +01003880 h2c->conn->owner = sess;
Olivier Houchard351411f2018-12-27 17:20:54 +01003881 if (!session_add_conn(sess, h2c->conn, h2c->conn->target)) {
3882 h2c->conn->owner = NULL;
3883 if (eb_is_empty(&h2c->streams_by_id)) {
3884 if (!srv_add_to_idle_list(objt_server(h2c->conn->target), h2c->conn))
3885 /* The server doesn't want it, let's kill the connection right away */
3886 h2c->conn->mux->destroy(h2c->conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003887 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
Olivier Houchard351411f2018-12-27 17:20:54 +01003888 return;
3889 }
3890 }
Olivier Houchard8a786902018-12-15 16:05:40 +01003891 }
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003892 if (eb_is_empty(&h2c->streams_by_id)) {
Christopher Fauletb2d930e2019-09-26 16:15:10 +02003893 if (session_check_idle_conn(h2c->conn->owner, h2c->conn) != 0) {
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003894 /* At this point either the connection is destroyed, or it's been added to the server idle list, just stop */
Willy Tarreaufe1c9082019-08-30 14:57:17 +02003895 TRACE_DEVEL("leaving without reusable idle connection", H2_EV_STRM_END);
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003896 return;
Christopher Fauletb2d930e2019-09-26 16:15:10 +02003897 }
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003898 }
Olivier Houchard8a786902018-12-15 16:05:40 +01003899 /* Never ever allow to reuse a connection from a non-reuse backend */
3900 if ((h2c->proxy->options & PR_O_REUSE_MASK) == PR_O_REUSE_NEVR)
3901 h2c->conn->flags |= CO_FL_PRIVATE;
Willy Tarreauc234ae32019-05-13 17:56:11 +02003902 if (!LIST_ADDED(&h2c->conn->list) && h2c->nb_streams < h2c->streams_limit) {
Olivier Houchard8a786902018-12-15 16:05:40 +01003903 struct server *srv = objt_server(h2c->conn->target);
3904
3905 if (srv) {
3906 if (h2c->conn->flags & CO_FL_PRIVATE)
3907 LIST_ADD(&srv->priv_conns[tid], &h2c->conn->list);
3908 else
3909 LIST_ADD(&srv->idle_conns[tid], &h2c->conn->list);
3910 }
3911
3912 }
3913 }
3914 }
3915
Willy Tarreaue323f342018-03-28 13:51:45 +02003916 /* We don't want to close right now unless we're removing the
3917 * last stream, and either the connection is in error, or it
3918 * reached the ID already specified in a GOAWAY frame received
3919 * or sent (as seen by last_sid >= 0).
3920 */
Olivier Houchard7a977432019-03-21 15:47:13 +01003921 if (h2c_is_dead(h2c)) {
Willy Tarreaue323f342018-03-28 13:51:45 +02003922 /* no more stream will come, kill it now */
Willy Tarreau7838a792019-08-12 18:42:03 +02003923 TRACE_DEVEL("leaving and killing dead connection", H2_EV_STRM_END, h2c->conn);
Christopher Faulet73c12072019-04-08 11:23:22 +02003924 h2_release(h2c);
Willy Tarreaue323f342018-03-28 13:51:45 +02003925 }
3926 else if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02003927 if (h2c_may_expire(h2c))
3928 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
3929 else
3930 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02003931 task_queue(h2c->task);
Willy Tarreau7838a792019-08-12 18:42:03 +02003932 TRACE_DEVEL("leaving, refreshing connection's timeout", H2_EV_STRM_END, h2c->conn);
Willy Tarreau60935142017-10-16 18:11:19 +02003933 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003934 else
3935 TRACE_DEVEL("leaving", H2_EV_STRM_END, h2c->conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003936}
3937
Willy Tarreau88bdba32019-05-13 18:17:53 +02003938/* Performs a synchronous or asynchronous shutr(). */
3939static void h2_do_shutr(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02003940{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003941 struct h2c *h2c = h2s->h2c;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003942 struct wait_event *sw = &h2s->wait_event;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003943
Willy Tarreauf983d002019-05-14 10:40:21 +02003944 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02003945 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003946
Willy Tarreau7838a792019-08-12 18:42:03 +02003947 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
3948
Willy Tarreau18059042019-01-31 19:12:48 +01003949 /* a connstream may require us to immediately kill the whole connection
3950 * for example because of a "tcp-request content reject" rule that is
3951 * normally used to limit abuse. In this case we schedule a goaway to
3952 * close the connection.
Willy Tarreau926fa4c2017-11-07 14:42:12 +01003953 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02003954 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01003955 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003956 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01003957 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
3958 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
3959 }
Christopher Faulet35757d32019-03-07 15:51:33 +01003960 else if (!(h2s->flags & H2_SF_HEADERS_SENT)) {
3961 /* Nothing was never sent for this stream, so reset with
3962 * REFUSED_STREAM error to let the client retry the
3963 * request.
3964 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003965 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01003966 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
3967 }
Willy Tarreaucfba9d62019-08-06 10:30:58 +02003968 else {
3969 /* a final response was already provided, we don't want this
3970 * stream anymore. This may happen when the server responds
3971 * before the end of an upload and closes quickly (redirect,
3972 * deny, ...)
3973 */
3974 h2s_error(h2s, H2_ERR_CANCEL);
3975 }
Willy Tarreau18059042019-01-31 19:12:48 +01003976
Willy Tarreau90c32322017-11-24 08:00:30 +01003977 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003978 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02003979 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01003980
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003981 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003982 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau00dd0782018-03-01 16:31:34 +01003983 h2s_close(h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02003984 done:
3985 h2s->flags &= ~H2_SF_WANT_SHUTR;
Willy Tarreau7838a792019-08-12 18:42:03 +02003986 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02003987 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003988add_to_list:
Willy Tarreauc234ae32019-05-13 17:56:11 +02003989 if (!LIST_ADDED(&h2s->list)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003990 sw->events |= SUB_RETRY_SEND;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003991 if (h2s->flags & H2_SF_BLK_MFCTL) {
3992 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
3993 h2s->send_wait = sw;
3994 } else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM)) {
3995 h2s->send_wait = sw;
3996 LIST_ADDQ(&h2c->send_list, &h2s->list);
3997 }
Willy Tarreaub2e290a2018-03-30 17:35:38 +02003998 }
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003999 /* Let the handler know we want shutr */
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004000 h2s->flags |= H2_SF_WANT_SHUTR;
Willy Tarreau7838a792019-08-12 18:42:03 +02004001 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004002 return;
Willy Tarreau62f52692017-10-08 23:01:42 +02004003}
4004
Willy Tarreau88bdba32019-05-13 18:17:53 +02004005/* Performs a synchronous or asynchronous shutw(). */
4006static void h2_do_shutw(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004007{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004008 struct h2c *h2c = h2s->h2c;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004009 struct wait_event *sw = &h2s->wait_event;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004010
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004011 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004012 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004013
Willy Tarreau7838a792019-08-12 18:42:03 +02004014 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4015
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004016 if (h2s->st != H2_SS_ERROR && (h2s->flags & H2_SF_HEADERS_SENT)) {
Willy Tarreau58e32082017-11-07 14:41:09 +01004017 /* we can cleanly close using an empty data frame only after headers */
4018
4019 if (!(h2s->flags & (H2_SF_ES_SENT|H2_SF_RST_SENT)) &&
4020 h2_send_empty_data_es(h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004021 goto add_to_list;
Willy Tarreau58e32082017-11-07 14:41:09 +01004022
4023 if (h2s->st == H2_SS_HREM)
Willy Tarreau00dd0782018-03-01 16:31:34 +01004024 h2s_close(h2s);
Willy Tarreau58e32082017-11-07 14:41:09 +01004025 else
4026 h2s->st = H2_SS_HLOC;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004027 } else {
Willy Tarreau18059042019-01-31 19:12:48 +01004028 /* a connstream may require us to immediately kill the whole connection
4029 * for example because of a "tcp-request content reject" rule that is
4030 * normally used to limit abuse. In this case we schedule a goaway to
4031 * close the connection.
Willy Tarreaua1349f02017-10-31 07:41:55 +01004032 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004033 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004034 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004035 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004036 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4037 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4038 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004039 else {
4040 /* Nothing was never sent for this stream, so reset with
4041 * REFUSED_STREAM error to let the client retry the
4042 * request.
4043 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004044 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004045 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4046 }
Willy Tarreau18059042019-01-31 19:12:48 +01004047
Willy Tarreau90c32322017-11-24 08:00:30 +01004048 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004049 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004050 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004051
Willy Tarreau00dd0782018-03-01 16:31:34 +01004052 h2s_close(h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004053 }
4054
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004055 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004056 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau7838a792019-08-12 18:42:03 +02004057
4058 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
4059
Willy Tarreau88bdba32019-05-13 18:17:53 +02004060 done:
4061 h2s->flags &= ~H2_SF_WANT_SHUTW;
4062 return;
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004063
4064 add_to_list:
Willy Tarreauc234ae32019-05-13 17:56:11 +02004065 if (!LIST_ADDED(&h2s->list)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004066 sw->events |= SUB_RETRY_SEND;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004067 if (h2s->flags & H2_SF_BLK_MFCTL) {
4068 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
4069 h2s->send_wait = sw;
4070 } else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM)) {
4071 h2s->send_wait = sw;
4072 LIST_ADDQ(&h2c->send_list, &h2s->list);
4073 }
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004074 }
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004075 /* let the handler know we want to shutw */
4076 h2s->flags |= H2_SF_WANT_SHUTW;
Willy Tarreau7838a792019-08-12 18:42:03 +02004077 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004078 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004079}
4080
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004081/* This is the tasklet referenced in h2s->wait_event.tasklet, it is used for
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004082 * deferred shutdowns when the h2_detach() was done but the mux buffer was full
4083 * and prevented the last frame from being emitted.
4084 */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004085static struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned short state)
4086{
4087 struct h2s *h2s = ctx;
Willy Tarreau88bdba32019-05-13 18:17:53 +02004088 struct h2c *h2c = h2s->h2c;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004089
Willy Tarreau7838a792019-08-12 18:42:03 +02004090 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4091
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004092 LIST_DEL_INIT(&h2s->sending_list);
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004093 if (h2s->flags & H2_SF_WANT_SHUTW)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004094 h2_do_shutw(h2s);
4095
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004096 if (h2s->flags & H2_SF_WANT_SHUTR)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004097 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004098
Willy Tarreau88bdba32019-05-13 18:17:53 +02004099 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004100 /* We're done trying to send, remove ourself from the send_list */
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004101 LIST_DEL_INIT(&h2s->list);
Olivier Houchard7a977432019-03-21 15:47:13 +01004102
Willy Tarreau88bdba32019-05-13 18:17:53 +02004103 if (!h2s->cs) {
4104 h2s_destroy(h2s);
4105 if (h2c_is_dead(h2c))
4106 h2_release(h2c);
4107 }
Olivier Houchard7a977432019-03-21 15:47:13 +01004108 }
4109
Willy Tarreau7838a792019-08-12 18:42:03 +02004110 TRACE_LEAVE(H2_EV_STRM_SHUT);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004111 return NULL;
Willy Tarreau62f52692017-10-08 23:01:42 +02004112}
4113
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004114/* shutr() called by the conn_stream (mux_ops.shutr) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004115static void h2_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
4116{
4117 struct h2s *h2s = cs->ctx;
4118
Willy Tarreau7838a792019-08-12 18:42:03 +02004119 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004120 if (cs->flags & CS_FL_KILL_CONN)
4121 h2s->flags |= H2_SF_KILL_CONN;
4122
Willy Tarreau7838a792019-08-12 18:42:03 +02004123 if (mode)
4124 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004125
Willy Tarreau7838a792019-08-12 18:42:03 +02004126 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004127}
4128
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004129/* shutw() called by the conn_stream (mux_ops.shutw) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004130static void h2_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
4131{
4132 struct h2s *h2s = cs->ctx;
4133
Willy Tarreau7838a792019-08-12 18:42:03 +02004134 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004135 if (cs->flags & CS_FL_KILL_CONN)
4136 h2s->flags |= H2_SF_KILL_CONN;
4137
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004138 h2_do_shutw(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02004139 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004140}
4141
Christopher Faulet9b79a102019-07-15 11:22:56 +02004142/* Decode the payload of a HEADERS frame and produce the HTX request or response
4143 * depending on the connection's side. Returns a positive value on success, a
4144 * negative value on failure, or 0 if it couldn't proceed. May report connection
4145 * errors in h2c->errcode if the frame is non-decodable and the connection
4146 * unrecoverable. In absence of connection error when a failure is reported, the
4147 * caller must assume a stream error.
Willy Tarreauea18f862018-12-22 20:19:26 +01004148 *
4149 * The function may fold CONTINUATION frames into the initial HEADERS frame
4150 * by removing padding and next frame header, then moving the CONTINUATION
4151 * frame's payload and adjusting h2c->dfl to match the new aggregated frame,
4152 * leaving a hole between the main frame and the beginning of the next one.
4153 * The possibly remaining incomplete or next frame at the end may be moved
4154 * if the aggregated frame is not deleted, in order to fill the hole. Wrapped
4155 * HEADERS frames are unwrapped into a temporary buffer before decoding.
4156 *
4157 * A buffer at the beginning of processing may look like this :
4158 *
4159 * ,---.---------.-----.--------------.--------------.------.---.
4160 * |///| HEADERS | PAD | CONTINUATION | CONTINUATION | DATA |///|
4161 * `---^---------^-----^--------------^--------------^------^---'
4162 * | | <-----> | |
4163 * area | dpl | wrap
4164 * |<--------------> |
4165 * | dfl |
4166 * |<-------------------------------------------------->|
4167 * head data
4168 *
4169 * Padding is automatically overwritten when folding, participating to the
4170 * hole size after dfl :
4171 *
4172 * ,---.------------------------.-----.--------------.------.---.
4173 * |///| HEADERS : CONTINUATION |/////| CONTINUATION | DATA |///|
4174 * `---^------------------------^-----^--------------^------^---'
4175 * | | <-----> | |
4176 * area | hole | wrap
4177 * |<-----------------------> |
4178 * | dfl |
4179 * |<-------------------------------------------------->|
4180 * head data
4181 *
4182 * Please note that the HEADERS frame is always deprived from its PADLEN byte
4183 * however it may start with the 5 stream-dep+weight bytes in case of PRIORITY
4184 * bit.
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004185 *
4186 * The <flags> field must point to either the stream's flags or to a copy of it
4187 * so that the function can update the following flags :
4188 * - H2_SF_DATA_CLEN when content-length is seen
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004189 * - H2_SF_HEADERS_RCVD once the frame is successfully decoded
Willy Tarreau88d138e2019-01-02 19:38:14 +01004190 *
4191 * The H2_SF_HEADERS_RCVD flag is also looked at in the <flags> field prior to
4192 * decoding, in order to detect if we're dealing with a headers or a trailers
4193 * block (the trailers block appears after H2_SF_HEADERS_RCVD was seen).
Willy Tarreau13278b42017-10-13 19:23:14 +02004194 */
Willy Tarreau4790f7c2019-01-24 11:33:02 +01004195static int h2c_decode_headers(struct h2c *h2c, struct buffer *rxbuf, uint32_t *flags, unsigned long long *body_len)
Willy Tarreau13278b42017-10-13 19:23:14 +02004196{
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004197 const uint8_t *hdrs = (uint8_t *)b_head(&h2c->dbuf);
Willy Tarreau83061a82018-07-13 11:56:34 +02004198 struct buffer *tmp = get_trash_chunk();
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004199 struct http_hdr list[global.tune.max_http_hdr * 2];
Willy Tarreau83061a82018-07-13 11:56:34 +02004200 struct buffer *copy = NULL;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004201 unsigned int msgf;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004202 struct htx *htx = NULL;
Willy Tarreauea18f862018-12-22 20:19:26 +01004203 int flen; // header frame len
4204 int hole = 0;
Willy Tarreau86277d42019-01-02 15:36:11 +01004205 int ret = 0;
4206 int outlen;
Willy Tarreau13278b42017-10-13 19:23:14 +02004207 int wrap;
Willy Tarreau13278b42017-10-13 19:23:14 +02004208
Willy Tarreau7838a792019-08-12 18:42:03 +02004209 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
4210
Willy Tarreauea18f862018-12-22 20:19:26 +01004211next_frame:
4212 if (b_data(&h2c->dbuf) - hole < h2c->dfl)
4213 goto leave; // incomplete input frame
4214
4215 /* No END_HEADERS means there's one or more CONTINUATION frames. In
4216 * this case, we'll try to paste it immediately after the initial
4217 * HEADERS frame payload and kill any possible padding. The initial
4218 * frame's length will be increased to represent the concatenation
4219 * of the two frames. The next frame is read from position <tlen>
4220 * and written at position <flen> (minus padding if some is present).
4221 */
4222 if (unlikely(!(h2c->dff & H2_F_HEADERS_END_HEADERS))) {
4223 struct h2_fh hdr;
4224 int clen; // CONTINUATION frame's payload length
4225
Willy Tarreau7838a792019-08-12 18:42:03 +02004226 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 +01004227 if (!h2_peek_frame_hdr(&h2c->dbuf, h2c->dfl + hole, &hdr)) {
4228 /* no more data, the buffer may be full, either due to
4229 * too large a frame or because of too large a hole that
4230 * we're going to compact at the end.
4231 */
4232 goto leave;
4233 }
4234
4235 if (hdr.ft != H2_FT_CONTINUATION) {
4236 /* RFC7540#6.10: frame of unexpected type */
Willy Tarreau7838a792019-08-12 18:42:03 +02004237 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 +01004238 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
4239 goto fail;
4240 }
4241
4242 if (hdr.sid != h2c->dsi) {
4243 /* RFC7540#6.10: frame of different stream */
Willy Tarreau7838a792019-08-12 18:42:03 +02004244 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 +01004245 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
4246 goto fail;
4247 }
4248
4249 if ((unsigned)hdr.len > (unsigned)global.tune.bufsize) {
4250 /* RFC7540#4.2: invalid frame length */
Willy Tarreau7838a792019-08-12 18:42:03 +02004251 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 +01004252 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4253 goto fail;
4254 }
4255
4256 /* detect when we must stop aggragating frames */
4257 h2c->dff |= hdr.ff & H2_F_HEADERS_END_HEADERS;
4258
4259 /* Take as much as we can of the CONTINUATION frame's payload */
4260 clen = b_data(&h2c->dbuf) - (h2c->dfl + hole + 9);
4261 if (clen > hdr.len)
4262 clen = hdr.len;
4263
4264 /* Move the frame's payload over the padding, hole and frame
4265 * header. At least one of hole or dpl is null (see diagrams
4266 * above). The hole moves after the new aggragated frame.
4267 */
4268 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole + 9), clen, -(h2c->dpl + hole + 9));
4269 h2c->dfl += clen - h2c->dpl;
4270 hole += h2c->dpl + 9;
4271 h2c->dpl = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004272 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 +01004273 goto next_frame;
4274 }
4275
4276 flen = h2c->dfl - h2c->dpl;
Willy Tarreau68472622017-12-11 18:36:37 +01004277
Willy Tarreau13278b42017-10-13 19:23:14 +02004278 /* if the input buffer wraps, take a temporary copy of it (rare) */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004279 wrap = b_wrap(&h2c->dbuf) - b_head(&h2c->dbuf);
Willy Tarreau13278b42017-10-13 19:23:14 +02004280 if (wrap < h2c->dfl) {
Willy Tarreau68dd9852017-07-03 14:44:26 +02004281 copy = alloc_trash_chunk();
4282 if (!copy) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004283 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 +02004284 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
4285 goto fail;
4286 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004287 memcpy(copy->area, b_head(&h2c->dbuf), wrap);
4288 memcpy(copy->area + wrap, b_orig(&h2c->dbuf), h2c->dfl - wrap);
4289 hdrs = (uint8_t *) copy->area;
Willy Tarreau13278b42017-10-13 19:23:14 +02004290 }
4291
Willy Tarreau13278b42017-10-13 19:23:14 +02004292 /* Skip StreamDep and weight for now (we don't support PRIORITY) */
4293 if (h2c->dff & H2_F_HEADERS_PRIORITY) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004294 if (read_n32(hdrs) == h2c->dsi) {
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004295 /* RFC7540#5.3.1 : stream dep may not depend on itself */
Willy Tarreau7838a792019-08-12 18:42:03 +02004296 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 +01004297 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreaua0d11b62018-09-05 18:30:05 +02004298 goto fail;
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004299 }
4300
Willy Tarreaua01f45e2018-12-31 07:41:24 +01004301 if (flen < 5) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004302 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 +01004303 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4304 goto fail;
4305 }
4306
Willy Tarreau13278b42017-10-13 19:23:14 +02004307 hdrs += 5; // stream dep = 4, weight = 1
4308 flen -= 5;
4309 }
4310
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004311 if (!h2_get_buf(h2c, rxbuf)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004312 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 +01004313 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau86277d42019-01-02 15:36:11 +01004314 goto leave;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004315 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004316
Willy Tarreau937f7602018-02-26 15:22:17 +01004317 /* we can't retry a failed decompression operation so we must be very
4318 * careful not to take any risks. In practice the output buffer is
4319 * always empty except maybe for trailers, in which case we simply have
4320 * to wait for the upper layer to finish consuming what is available.
4321 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004322 htx = htx_from_buf(rxbuf);
4323 if (!htx_is_empty(htx)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004324 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 +02004325 h2c->flags |= H2_CF_DEM_SFULL;
4326 goto leave;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004327 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004328
Willy Tarreau25919232019-01-03 14:48:18 +01004329 /* past this point we cannot roll back in case of error */
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004330 outlen = hpack_decode_frame(h2c->ddht, hdrs, flen, list,
4331 sizeof(list)/sizeof(list[0]), tmp);
4332 if (outlen < 0) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004333 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 +01004334 h2c_error(h2c, H2_ERR_COMPRESSION_ERROR);
4335 goto fail;
4336 }
4337
Willy Tarreau25919232019-01-03 14:48:18 +01004338 /* The PACK decompressor was updated, let's update the input buffer and
4339 * the parser's state to commit these changes and allow us to later
4340 * fail solely on the stream if needed.
4341 */
4342 b_del(&h2c->dbuf, h2c->dfl + hole);
4343 h2c->dfl = hole = 0;
4344 h2c->st0 = H2_CS_FRAME_H;
4345
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004346 /* OK now we have our header list in <list> */
Willy Tarreau880f5802019-01-03 08:10:14 +01004347 msgf = (h2c->dff & H2_F_HEADERS_END_STREAM) ? 0 : H2_MSGF_BODY;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004348
Willy Tarreau88d138e2019-01-02 19:38:14 +01004349 if (*flags & H2_SF_HEADERS_RCVD)
4350 goto trailers;
4351
4352 /* This is the first HEADERS frame so it's a headers block */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004353 if (h2c->flags & H2_CF_IS_BACK)
4354 outlen = h2_make_htx_response(list, htx, &msgf, body_len);
4355 else
4356 outlen = h2_make_htx_request(list, htx, &msgf, body_len);
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004357
4358 if (outlen < 0) {
Willy Tarreau25919232019-01-03 14:48:18 +01004359 /* too large headers? this is a stream error only */
Willy Tarreau7838a792019-08-12 18:42:03 +02004360 TRACE_STATE("request headers too large", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2S_ERR|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004361 goto fail;
4362 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004363
Willy Tarreau174b06a2018-04-25 18:13:58 +02004364 if (msgf & H2_MSGF_BODY) {
4365 /* a payload is present */
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004366 if (msgf & H2_MSGF_BODY_CL) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004367 *flags |= H2_SF_DATA_CLEN;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004368 htx->extra = *body_len;
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004369 }
Willy Tarreau174b06a2018-04-25 18:13:58 +02004370 }
4371
Willy Tarreau88d138e2019-01-02 19:38:14 +01004372 done:
Christopher Faulet0b465482019-02-19 15:14:23 +01004373 /* indicate that a HEADERS frame was received for this stream, except
4374 * for 1xx responses. For 1xx responses, another HEADERS frame is
4375 * expected.
4376 */
4377 if (!(msgf & H2_MSGF_RSP_1XX))
4378 *flags |= H2_SF_HEADERS_RCVD;
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004379
Christopher Fauletb75b5ea2019-05-17 08:37:28 +02004380 if ((h2c->dff & H2_F_HEADERS_END_STREAM)) {
Christopher Faulet9b79a102019-07-15 11:22:56 +02004381 /* Mark the end of message using EOM */
Willy Tarreau7838a792019-08-12 18:42:03 +02004382 if (!htx_add_endof(htx, HTX_BLK_EOM)) {
4383 TRACE_STATE("failed to append HTX EOM block into rxbuf", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_H2S_ERR, h2c->conn);
Christopher Faulet9b79a102019-07-15 11:22:56 +02004384 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004385 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01004386 }
Willy Tarreau937f7602018-02-26 15:22:17 +01004387
Willy Tarreau86277d42019-01-02 15:36:11 +01004388 /* success */
4389 ret = 1;
4390
Willy Tarreau68dd9852017-07-03 14:44:26 +02004391 leave:
Willy Tarreau86277d42019-01-02 15:36:11 +01004392 /* If there is a hole left and it's not at the end, we are forced to
Willy Tarreauea18f862018-12-22 20:19:26 +01004393 * move the remaining data over it.
4394 */
4395 if (hole) {
4396 if (b_data(&h2c->dbuf) > h2c->dfl + hole)
4397 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole),
4398 b_data(&h2c->dbuf) - (h2c->dfl + hole), -hole);
4399 b_sub(&h2c->dbuf, hole);
4400 }
4401
Willy Tarreau97215ca2019-04-29 10:20:21 +02004402 if (b_full(&h2c->dbuf) && h2c->dfl >= b_data(&h2c->dbuf)) {
Willy Tarreauea18f862018-12-22 20:19:26 +01004403 /* too large frames */
4404 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau86277d42019-01-02 15:36:11 +01004405 ret = -1;
Willy Tarreauea18f862018-12-22 20:19:26 +01004406 }
4407
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004408 if (htx)
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004409 htx_to_buf(htx, rxbuf);
Willy Tarreau68dd9852017-07-03 14:44:26 +02004410 free_trash_chunk(copy);
Willy Tarreau7838a792019-08-12 18:42:03 +02004411 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau86277d42019-01-02 15:36:11 +01004412 return ret;
4413
Willy Tarreau68dd9852017-07-03 14:44:26 +02004414 fail:
Willy Tarreau86277d42019-01-02 15:36:11 +01004415 ret = -1;
Willy Tarreau68dd9852017-07-03 14:44:26 +02004416 goto leave;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004417
4418 trailers:
4419 /* This is the last HEADERS frame hence a trailer */
Willy Tarreau88d138e2019-01-02 19:38:14 +01004420 if (!(h2c->dff & H2_F_HEADERS_END_STREAM)) {
4421 /* It's a trailer but it's missing ES flag */
Willy Tarreau7838a792019-08-12 18:42:03 +02004422 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 +01004423 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
4424 goto fail;
4425 }
4426
Christopher Faulet9b79a102019-07-15 11:22:56 +02004427 /* Trailers terminate a DATA sequence */
Willy Tarreau7838a792019-08-12 18:42:03 +02004428 if (h2_make_htx_trailers(list, htx) <= 0) {
4429 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 +02004430 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004431 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01004432 goto done;
Willy Tarreau13278b42017-10-13 19:23:14 +02004433}
4434
Christopher Faulet9b79a102019-07-15 11:22:56 +02004435/* Transfer the payload of a DATA frame to the HTTP/1 side. The HTTP/2 frame
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004436 * parser state is automatically updated. Returns > 0 if it could completely
4437 * send the current frame, 0 if it couldn't complete, in which case
4438 * CS_FL_RCV_MORE must be checked to know if some data remain pending (an empty
4439 * DATA frame can return 0 as a valid result). Stream errors are reported in
4440 * h2s->errcode and connection errors in h2c->errcode. The caller must already
4441 * have checked the frame header and ensured that the frame was complete or the
4442 * buffer full. It changes the frame state to FRAME_A once done.
Willy Tarreau454f9052017-10-26 19:40:35 +02004443 */
Willy Tarreau454b57b2018-02-26 15:50:05 +01004444static int h2_frt_transfer_data(struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02004445{
4446 struct h2c *h2c = h2s->h2c;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004447 int block;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004448 unsigned int flen = 0;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004449 struct htx *htx = NULL;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004450 struct buffer *csbuf;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004451 unsigned int sent;
Willy Tarreau454f9052017-10-26 19:40:35 +02004452
Willy Tarreau7838a792019-08-12 18:42:03 +02004453 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
4454
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004455 h2c->flags &= ~H2_CF_DEM_SFULL;
Willy Tarreau454f9052017-10-26 19:40:35 +02004456
Olivier Houchard638b7992018-08-16 15:41:52 +02004457 csbuf = h2_get_buf(h2c, &h2s->rxbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004458 if (!csbuf) {
4459 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02004460 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 +01004461 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004462 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004463 htx = htx_from_buf(csbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004464
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004465try_again:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004466 flen = h2c->dfl - h2c->dpl;
4467 if (!flen)
Willy Tarreau4a28da12018-01-04 14:41:00 +01004468 goto end_transfer;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004469
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004470 if (flen > b_data(&h2c->dbuf)) {
4471 flen = b_data(&h2c->dbuf);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004472 if (!flen)
Willy Tarreau454b57b2018-02-26 15:50:05 +01004473 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004474 }
4475
Christopher Faulet9b79a102019-07-15 11:22:56 +02004476 block = htx_free_data_space(htx);
4477 if (!block) {
4478 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004479 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 +02004480 goto fail;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004481 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004482 if (flen > block)
4483 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004484
Christopher Faulet9b79a102019-07-15 11:22:56 +02004485 /* here, flen is the max we can copy into the output buffer */
4486 block = b_contig_data(&h2c->dbuf, 0);
4487 if (flen > block)
4488 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004489
Christopher Faulet9b79a102019-07-15 11:22:56 +02004490 sent = htx_add_data(htx, ist2(b_head(&h2c->dbuf), flen));
Willy Tarreau7838a792019-08-12 18:42:03 +02004491 TRACE_DATA("move some data to h2s rxbuf", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s,, (void *)(long)sent);
Willy Tarreau454f9052017-10-26 19:40:35 +02004492
Christopher Faulet9b79a102019-07-15 11:22:56 +02004493 b_del(&h2c->dbuf, sent);
4494 h2c->dfl -= sent;
4495 h2c->rcvd_c += sent;
4496 h2c->rcvd_s += sent; // warning, this can also affect the closed streams!
Willy Tarreau454f9052017-10-26 19:40:35 +02004497
Christopher Faulet9b79a102019-07-15 11:22:56 +02004498 if (h2s->flags & H2_SF_DATA_CLEN) {
4499 h2s->body_len -= sent;
4500 htx->extra = h2s->body_len;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004501 }
4502
Christopher Faulet9b79a102019-07-15 11:22:56 +02004503 if (sent < flen) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01004504 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004505 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 +01004506 goto fail;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004507 }
4508
Christopher Faulet9b79a102019-07-15 11:22:56 +02004509 goto try_again;
4510
Willy Tarreau4a28da12018-01-04 14:41:00 +01004511 end_transfer:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004512 /* here we're done with the frame, all the payload (except padding) was
4513 * transferred.
4514 */
Willy Tarreaueba10f22018-04-25 20:44:22 +02004515
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004516 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Faulet9b79a102019-07-15 11:22:56 +02004517 if (!htx_add_endof(htx, HTX_BLK_EOM)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004518 TRACE_STATE("h2s rxbuf is full, failed to add EOM", H2_EV_RX_FRAME|H2_EV_RX_DATA|H2_EV_H2S_BLK, h2c->conn, h2s);
Christopher Faulet9b79a102019-07-15 11:22:56 +02004519 h2c->flags |= H2_CF_DEM_SFULL;
4520 goto fail;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004521 }
Willy Tarreaueba10f22018-04-25 20:44:22 +02004522 }
4523
Willy Tarreaud1023bb2018-03-22 16:53:12 +01004524 h2c->rcvd_c += h2c->dpl;
4525 h2c->rcvd_s += h2c->dpl;
4526 h2c->dpl = 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02004527 h2c->st0 = H2_CS_FRAME_A; // send the corresponding window update
Christopher Faulet9b79a102019-07-15 11:22:56 +02004528 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02004529 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004530 return 1;
Willy Tarreau454b57b2018-02-26 15:50:05 +01004531 fail:
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004532 if (htx)
4533 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02004534 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454b57b2018-02-26 15:50:05 +01004535 return 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02004536}
4537
Willy Tarreau115e83b2018-12-01 19:17:53 +01004538/* Try to send a HEADERS frame matching HTX response present in HTX message
4539 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
4540 * must check the stream's status to detect any error which might have happened
4541 * subsequently to a successful send. The htx blocks are automatically removed
4542 * from the message. The htx message is assumed to be valid since produced from
4543 * the internal code, hence it contains a start line, an optional series of
4544 * header blocks and an end of header, otherwise an invalid frame could be
4545 * emitted and the resulting htx message could be left in an inconsistent state.
4546 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004547static size_t h2s_frt_make_resp_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau115e83b2018-12-01 19:17:53 +01004548{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004549 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau115e83b2018-12-01 19:17:53 +01004550 struct h2c *h2c = h2s->h2c;
4551 struct htx_blk *blk;
4552 struct htx_blk *blk_end;
4553 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02004554 struct buffer *mbuf;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004555 struct htx_sl *sl;
4556 enum htx_blk_type type;
4557 int es_now = 0;
4558 int ret = 0;
4559 int hdr;
4560 int idx;
4561
Willy Tarreau7838a792019-08-12 18:42:03 +02004562 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
4563
Willy Tarreau115e83b2018-12-01 19:17:53 +01004564 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004565 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004566 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02004567 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004568 return 0;
4569 }
4570
Willy Tarreau115e83b2018-12-01 19:17:53 +01004571 /* determine the first block which must not be deleted, blk_end may
4572 * be NULL if all blocks have to be deleted.
4573 */
4574 idx = htx_get_head(htx);
4575 blk_end = NULL;
4576 while (idx != -1) {
4577 type = htx_get_blk_type(htx_get_blk(htx, idx));
4578 idx = htx_get_next(htx, idx);
4579 if (type == HTX_BLK_EOH) {
4580 if (idx != -1)
4581 blk_end = htx_get_blk(htx, idx);
4582 break;
4583 }
4584 }
4585
4586 /* get the start line, we do have one */
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004587 blk = htx_get_head_blk(htx);
4588 BUG_ON(htx_get_blk_type(blk) != HTX_BLK_RES_SL);
4589 ALREADY_CHECKED(blk);
4590 sl = htx_get_blk_ptr(htx, blk);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004591 h2s->status = sl->info.res.status;
Willy Tarreau7838a792019-08-12 18:42:03 +02004592 if (h2s->status < 100 || h2s->status > 999) {
4593 TRACE_PROTO("will not encode an invalid status code", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreauaafdf582018-12-10 18:06:40 +01004594 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004595 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01004596
4597 /* and the rest of the headers, that we dump starting at header 0 */
4598 hdr = 0;
4599
Willy Tarreau8e162ee2018-12-06 14:07:27 +01004600 idx = htx_get_head(htx); // returns the SL that we skip
Willy Tarreau115e83b2018-12-01 19:17:53 +01004601 while ((idx = htx_get_next(htx, idx)) != -1) {
4602 blk = htx_get_blk(htx, idx);
4603 type = htx_get_blk_type(blk);
4604
4605 if (type == HTX_BLK_UNUSED)
4606 continue;
4607
4608 if (type != HTX_BLK_HDR)
4609 break;
4610
Willy Tarreau7838a792019-08-12 18:42:03 +02004611 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
4612 TRACE_PROTO("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004613 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004614 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01004615
4616 list[hdr].n = htx_get_blk_name(htx, blk);
4617 list[hdr].v = htx_get_blk_value(htx, blk);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004618 hdr++;
4619 }
4620
4621 /* marker for end of headers */
4622 list[hdr].n = ist("");
4623
4624 if (h2s->status == 204 || h2s->status == 304) {
4625 /* no contents, claim c-len is present and set to zero */
4626 es_now = 1;
4627 }
4628
Willy Tarreau9c218e72019-05-26 10:08:28 +02004629 mbuf = br_tail(h2c->mbuf);
4630 retry:
4631 if (!h2_get_buf(h2c, mbuf)) {
4632 h2c->flags |= H2_CF_MUX_MALLOC;
4633 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02004634 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 +02004635 return 0;
4636 }
4637
Willy Tarreau115e83b2018-12-01 19:17:53 +01004638 chunk_reset(&outbuf);
4639
4640 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004641 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
4642 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004643 break;
4644 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02004645 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau115e83b2018-12-01 19:17:53 +01004646 }
4647
4648 if (outbuf.size < 9)
4649 goto full;
4650
4651 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
4652 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
4653 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4654 outbuf.data = 9;
4655
4656 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01004657 if (!hpack_encode_int_status(&outbuf, h2s->status)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004658 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004659 goto realign_again;
4660 goto full;
4661 }
4662
4663 /* encode all headers, stop at empty name */
4664 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
4665 /* these ones do not exist in H2 and must be dropped. */
4666 if (isteq(list[hdr].n, ist("connection")) ||
4667 isteq(list[hdr].n, ist("proxy-connection")) ||
4668 isteq(list[hdr].n, ist("keep-alive")) ||
4669 isteq(list[hdr].n, ist("upgrade")) ||
4670 isteq(list[hdr].n, ist("transfer-encoding")))
4671 continue;
4672
Christopher Faulet86d144c2019-08-14 16:32:25 +02004673 /* Skip all pseudo-headers */
4674 if (*(list[hdr].n.ptr) == ':')
4675 continue;
4676
Willy Tarreau115e83b2018-12-01 19:17:53 +01004677 if (isteq(list[hdr].n, ist("")))
4678 break; // end
4679
4680 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
4681 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004682 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004683 goto realign_again;
4684 goto full;
4685 }
4686 }
4687
Willy Tarreaucb985a42019-10-07 16:56:34 +02004688 /* update the frame's size */
4689 h2_set_frame_size(outbuf.area, outbuf.data - 9);
4690
4691 if (outbuf.data > h2c->mfs + 9) {
4692 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
4693 /* output full */
4694 if (b_space_wraps(mbuf))
4695 goto realign_again;
4696 goto full;
4697 }
4698 }
4699
Christopher Faulet0b465482019-02-19 15:14:23 +01004700 /* we may need to add END_STREAM except for 1xx responses.
Willy Tarreau115e83b2018-12-01 19:17:53 +01004701 * FIXME: we should also set it when we know for sure that the
4702 * content-length is zero as well as on 204/304
4703 */
Christopher Faulet0b465482019-02-19 15:14:23 +01004704 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM &&
4705 (h2s->status >= 200 || h2s->status == 101))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004706 es_now = 1;
4707
Willy Tarreau927b88b2019-03-04 08:03:25 +01004708 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW)
Willy Tarreau115e83b2018-12-01 19:17:53 +01004709 es_now = 1;
4710
Willy Tarreau115e83b2018-12-01 19:17:53 +01004711 if (es_now)
4712 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
4713
4714 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02004715 TRACE_USER("sent H2 response", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
Willy Tarreaubcc45952019-05-26 10:05:50 +02004716 b_add(mbuf, outbuf.data);
Christopher Faulet0b465482019-02-19 15:14:23 +01004717
4718 /* indicates the HEADERS frame was sent, except for 1xx responses. For
4719 * 1xx responses, another HEADERS frame is expected.
4720 */
4721 if (h2s->status >= 200 || h2s->status == 101)
4722 h2s->flags |= H2_SF_HEADERS_SENT;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004723
Willy Tarreau115e83b2018-12-01 19:17:53 +01004724 if (es_now) {
4725 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02004726 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 +01004727 if (h2s->st == H2_SS_OPEN)
4728 h2s->st = H2_SS_HLOC;
4729 else
4730 h2s_close(h2s);
4731 }
4732
4733 /* OK we could properly deliver the response */
4734
4735 /* remove all header blocks including the EOH and compute the
4736 * corresponding size.
4737 *
4738 * FIXME: We should remove everything when es_now is set.
4739 */
4740 ret = 0;
4741 idx = htx_get_head(htx);
4742 blk = htx_get_blk(htx, idx);
4743 while (blk != blk_end) {
4744 ret += htx_get_blksz(blk);
4745 blk = htx_remove_blk(htx, blk);
4746 }
Willy Tarreauc5753ae2018-12-02 12:28:01 +01004747
Christopher Faulet316934d2019-05-15 14:22:48 +02004748 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
4749 ret += htx_get_blksz(blk_end);
Willy Tarreauc5753ae2018-12-02 12:28:01 +01004750 htx_remove_blk(htx, blk_end);
Christopher Faulet316934d2019-05-15 14:22:48 +02004751 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01004752 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02004753 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004754 return ret;
4755 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02004756 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
4757 goto retry;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004758 h2c->flags |= H2_CF_MUX_MFULL;
4759 h2s->flags |= H2_SF_BLK_MROOM;
4760 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004761 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 +01004762 goto end;
4763 fail:
4764 /* unparsable HTX messages, too large ones to be produced in the local
4765 * list etc go here (unrecoverable errors).
4766 */
4767 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
4768 ret = 0;
4769 goto end;
4770}
4771
Willy Tarreau80739692018-10-05 11:35:57 +02004772/* Try to send a HEADERS frame matching HTX request present in HTX message
4773 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
4774 * must check the stream's status to detect any error which might have happened
4775 * subsequently to a successful send. The htx blocks are automatically removed
4776 * from the message. The htx message is assumed to be valid since produced from
4777 * the internal code, hence it contains a start line, an optional series of
4778 * header blocks and an end of header, otherwise an invalid frame could be
4779 * emitted and the resulting htx message could be left in an inconsistent state.
4780 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004781static size_t h2s_bck_make_req_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau80739692018-10-05 11:35:57 +02004782{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004783 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau80739692018-10-05 11:35:57 +02004784 struct h2c *h2c = h2s->h2c;
4785 struct htx_blk *blk;
4786 struct htx_blk *blk_end;
4787 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02004788 struct buffer *mbuf;
Willy Tarreau80739692018-10-05 11:35:57 +02004789 struct htx_sl *sl;
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004790 struct ist meth, uri, auth;
Willy Tarreau80739692018-10-05 11:35:57 +02004791 enum htx_blk_type type;
4792 int es_now = 0;
4793 int ret = 0;
4794 int hdr;
4795 int idx;
4796
Willy Tarreau7838a792019-08-12 18:42:03 +02004797 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
4798
Willy Tarreau80739692018-10-05 11:35:57 +02004799 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004800 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02004801 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02004802 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02004803 return 0;
4804 }
4805
Willy Tarreau80739692018-10-05 11:35:57 +02004806 /* determine the first block which must not be deleted, blk_end may
4807 * be NULL if all blocks have to be deleted.
4808 */
4809 idx = htx_get_head(htx);
4810 blk_end = NULL;
4811 while (idx != -1) {
4812 type = htx_get_blk_type(htx_get_blk(htx, idx));
4813 idx = htx_get_next(htx, idx);
4814 if (type == HTX_BLK_EOH) {
4815 if (idx != -1)
4816 blk_end = htx_get_blk(htx, idx);
4817 break;
4818 }
4819 }
4820
4821 /* get the start line, we do have one */
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004822 blk = htx_get_head_blk(htx);
4823 BUG_ON(htx_get_blk_type(blk) != HTX_BLK_REQ_SL);
4824 ALREADY_CHECKED(blk);
4825 sl = htx_get_blk_ptr(htx, blk);
Willy Tarreau80739692018-10-05 11:35:57 +02004826 meth = htx_sl_req_meth(sl);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004827 uri = htx_sl_req_uri(sl);
4828 if (unlikely(uri.len == 0)) {
4829 TRACE_PROTO("no URI in HTX request", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
4830 goto fail;
4831 }
Willy Tarreau80739692018-10-05 11:35:57 +02004832
4833 /* and the rest of the headers, that we dump starting at header 0 */
4834 hdr = 0;
4835
Willy Tarreau8e162ee2018-12-06 14:07:27 +01004836 idx = htx_get_head(htx); // returns the SL that we skip
Willy Tarreau80739692018-10-05 11:35:57 +02004837 while ((idx = htx_get_next(htx, idx)) != -1) {
4838 blk = htx_get_blk(htx, idx);
4839 type = htx_get_blk_type(blk);
4840
4841 if (type == HTX_BLK_UNUSED)
4842 continue;
4843
4844 if (type != HTX_BLK_HDR)
4845 break;
4846
Willy Tarreau7838a792019-08-12 18:42:03 +02004847 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
4848 TRACE_PROTO("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02004849 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004850 }
Willy Tarreau80739692018-10-05 11:35:57 +02004851
4852 list[hdr].n = htx_get_blk_name(htx, blk);
4853 list[hdr].v = htx_get_blk_value(htx, blk);
Christopher Faulet67d58092019-10-02 10:51:38 +02004854
4855 /* Skip header if same name is used to add the server name */
4856 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name &&
4857 isteq(list[hdr].n, ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len)))
4858 continue;
4859
Willy Tarreau80739692018-10-05 11:35:57 +02004860 hdr++;
4861 }
4862
Christopher Faulet72ba6cd2019-09-24 16:20:05 +02004863 /* Now add the server name to a header (if requested) */
4864 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name) {
4865 struct server *srv = objt_server(h2c->conn->target);
4866
4867 if (srv) {
4868 list[hdr].n = ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len);
4869 list[hdr].v = ist(srv->id);
4870 hdr++;
4871 }
4872 }
4873
Willy Tarreau80739692018-10-05 11:35:57 +02004874 /* marker for end of headers */
4875 list[hdr].n = ist("");
4876
Willy Tarreau9c218e72019-05-26 10:08:28 +02004877 mbuf = br_tail(h2c->mbuf);
4878 retry:
4879 if (!h2_get_buf(h2c, mbuf)) {
4880 h2c->flags |= H2_CF_MUX_MALLOC;
4881 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02004882 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 +02004883 return 0;
4884 }
4885
Willy Tarreau80739692018-10-05 11:35:57 +02004886 chunk_reset(&outbuf);
4887
4888 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004889 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
4890 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02004891 break;
4892 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02004893 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau80739692018-10-05 11:35:57 +02004894 }
4895
4896 if (outbuf.size < 9)
4897 goto full;
4898
4899 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
4900 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
4901 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4902 outbuf.data = 9;
4903
4904 /* encode the method, which necessarily is the first one */
Willy Tarreaubdabc3a2018-12-10 18:25:11 +01004905 if (!hpack_encode_method(&outbuf, sl->info.req.meth, meth)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004906 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02004907 goto realign_again;
4908 goto full;
4909 }
4910
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004911 auth = ist(NULL);
4912
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004913 /* RFC7540 #8.3: the CONNECT method must have :
4914 * - :authority set to the URI part (host:port)
4915 * - :method set to CONNECT
4916 * - :scheme and :path omitted
4917 */
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004918 if (unlikely(sl->info.req.meth == HTTP_METH_CONNECT)) {
4919 auth = uri;
4920
4921 if (!hpack_encode_header(&outbuf, ist(":authority"), auth)) {
4922 /* output full */
4923 if (b_space_wraps(mbuf))
4924 goto realign_again;
4925 goto full;
4926 }
4927 } else {
4928 /* other methods need a :scheme. If an authority is known from
4929 * the request line, it must be sent, otherwise only host is
4930 * sent. Host is never sent as the authority.
4931 */
4932 struct ist scheme = { };
Christopher Faulet3b44c542019-06-14 10:46:51 +02004933
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004934 if (uri.ptr[0] != '/' && uri.ptr[0] != '*') {
4935 /* the URI seems to start with a scheme */
4936 int len = 1;
4937
4938 while (len < uri.len && uri.ptr[len] != ':')
4939 len++;
4940
4941 if (len + 2 < uri.len && uri.ptr[len + 1] == '/' && uri.ptr[len + 2] == '/') {
4942 /* make the uri start at the authority now */
4943 scheme.ptr = uri.ptr;
4944 scheme.len = len,
4945 uri.ptr += len + 3;
4946 uri.len -= len + 3;
4947
4948 /* find the auth part of the URI */
4949 auth.ptr = uri.ptr;
4950 auth.len = 0;
4951 while (auth.len < uri.len && auth.ptr[auth.len] != '/')
4952 auth.len++;
4953
4954 uri.ptr += auth.len;
4955 uri.len -= auth.len;
4956 }
4957 }
4958
4959 if (!scheme.len) {
4960 /* no explicit scheme, we're using an origin-form URI,
4961 * probably from an H1 request transcoded to H2 via an
4962 * external layer, then received as H2 without authority.
4963 * So we have to look up the scheme from the HTX flags.
4964 * In such a case only http and https are possible, and
4965 * https is the default (sent by browsers).
4966 */
4967 if ((sl->flags & (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP)) == (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP))
4968 scheme = ist("http");
4969 else
4970 scheme = ist("https");
4971 }
Christopher Faulet3b44c542019-06-14 10:46:51 +02004972
4973 if (!hpack_encode_scheme(&outbuf, scheme)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004974 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004975 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004976 goto realign_again;
4977 goto full;
4978 }
Willy Tarreau80739692018-10-05 11:35:57 +02004979
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004980 if (auth.len && !hpack_encode_header(&outbuf, ist(":authority"), auth)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004981 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004982 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004983 goto realign_again;
4984 goto full;
4985 }
Willy Tarreau053c1572019-02-01 16:13:59 +01004986
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004987 /* encode the path. RFC7540#8.1.2.3: if path is empty it must
4988 * be sent as '/' or '*'.
4989 */
4990 if (unlikely(!uri.len)) {
4991 if (sl->info.req.meth == HTTP_METH_OPTIONS)
4992 uri = ist("*");
4993 else
4994 uri = ist("/");
Willy Tarreau053c1572019-02-01 16:13:59 +01004995 }
Willy Tarreau053c1572019-02-01 16:13:59 +01004996
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004997 if (!hpack_encode_path(&outbuf, uri)) {
4998 /* output full */
4999 if (b_space_wraps(mbuf))
5000 goto realign_again;
5001 goto full;
5002 }
Willy Tarreau80739692018-10-05 11:35:57 +02005003 }
5004
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005005 /* encode all headers, stop at empty name. Host is only sent if we
5006 * do not provide an authority.
5007 */
Willy Tarreau80739692018-10-05 11:35:57 +02005008 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
5009 /* these ones do not exist in H2 and must be dropped. */
5010 if (isteq(list[hdr].n, ist("connection")) ||
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005011 (auth.len && isteq(list[hdr].n, ist("host"))) ||
Willy Tarreau80739692018-10-05 11:35:57 +02005012 isteq(list[hdr].n, ist("proxy-connection")) ||
5013 isteq(list[hdr].n, ist("keep-alive")) ||
5014 isteq(list[hdr].n, ist("upgrade")) ||
5015 isteq(list[hdr].n, ist("transfer-encoding")))
5016 continue;
5017
Christopher Faulet86d144c2019-08-14 16:32:25 +02005018 /* Skip all pseudo-headers */
5019 if (*(list[hdr].n.ptr) == ':')
5020 continue;
5021
Willy Tarreau80739692018-10-05 11:35:57 +02005022 if (isteq(list[hdr].n, ist("")))
5023 break; // end
5024
5025 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
5026 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005027 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005028 goto realign_again;
5029 goto full;
5030 }
5031 }
5032
Willy Tarreaucb985a42019-10-07 16:56:34 +02005033 /* update the frame's size */
5034 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5035
5036 if (outbuf.data > h2c->mfs + 9) {
5037 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5038 /* output full */
5039 if (b_space_wraps(mbuf))
5040 goto realign_again;
5041 goto full;
5042 }
5043 }
5044
Willy Tarreau80739692018-10-05 11:35:57 +02005045 /* we may need to add END_STREAM if we have no body :
5046 * - request already closed, or :
5047 * - no transfer-encoding, and :
5048 * - no content-length or content-length:0
5049 * Fixme: this doesn't take into account CONNECT requests.
5050 */
5051 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM)
5052 es_now = 1;
5053
5054 if (sl->flags & HTX_SL_F_BODYLESS)
5055 es_now = 1;
5056
Willy Tarreau927b88b2019-03-04 08:03:25 +01005057 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW)
Willy Tarreau80739692018-10-05 11:35:57 +02005058 es_now = 1;
5059
Willy Tarreau80739692018-10-05 11:35:57 +02005060 if (es_now)
5061 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5062
5063 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02005064 TRACE_USER("sent H2 request", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
Willy Tarreaubcc45952019-05-26 10:05:50 +02005065 b_add(mbuf, outbuf.data);
Willy Tarreau80739692018-10-05 11:35:57 +02005066 h2s->flags |= H2_SF_HEADERS_SENT;
5067 h2s->st = H2_SS_OPEN;
5068
Willy Tarreau80739692018-10-05 11:35:57 +02005069 if (es_now) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005070 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 +02005071 // trim any possibly pending data (eg: inconsistent content-length)
5072 h2s->flags |= H2_SF_ES_SENT;
5073 h2s->st = H2_SS_HLOC;
5074 }
5075
5076 /* remove all header blocks including the EOH and compute the
5077 * corresponding size.
5078 *
5079 * FIXME: We should remove everything when es_now is set.
5080 */
5081 ret = 0;
5082 idx = htx_get_head(htx);
5083 blk = htx_get_blk(htx, idx);
5084 while (blk != blk_end) {
5085 ret += htx_get_blksz(blk);
5086 blk = htx_remove_blk(htx, blk);
5087 }
5088
Christopher Faulet316934d2019-05-15 14:22:48 +02005089 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
5090 ret += htx_get_blksz(blk_end);
Willy Tarreau80739692018-10-05 11:35:57 +02005091 htx_remove_blk(htx, blk_end);
Christopher Faulet316934d2019-05-15 14:22:48 +02005092 }
Willy Tarreau80739692018-10-05 11:35:57 +02005093
5094 end:
5095 return ret;
5096 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005097 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5098 goto retry;
Willy Tarreau80739692018-10-05 11:35:57 +02005099 h2c->flags |= H2_CF_MUX_MFULL;
5100 h2s->flags |= H2_SF_BLK_MROOM;
5101 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005102 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 +02005103 goto end;
5104 fail:
5105 /* unparsable HTX messages, too large ones to be produced in the local
5106 * list etc go here (unrecoverable errors).
5107 */
5108 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5109 ret = 0;
5110 goto end;
5111}
5112
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005113/* Try to send a DATA frame matching HTTP response present in HTX structure
Willy Tarreau98de12a2018-12-12 07:03:00 +01005114 * present in <buf>, for stream <h2s>. Returns the number of bytes sent. The
5115 * caller must check the stream's status to detect any error which might have
5116 * happened subsequently to a successful send. Returns the number of data bytes
Christopher Faulet54b5e212019-06-04 10:08:28 +02005117 * consumed, or zero if nothing done. Note that EOM count for 1 byte.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005118 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005119static size_t h2s_frt_make_resp_data(struct h2s *h2s, struct buffer *buf, size_t count)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005120{
5121 struct h2c *h2c = h2s->h2c;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005122 struct htx *htx;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005123 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005124 struct buffer *mbuf;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005125 size_t total = 0;
5126 int es_now = 0;
5127 int bsize; /* htx block size */
5128 int fsize; /* h2 frame size */
5129 struct htx_blk *blk;
5130 enum htx_blk_type type;
5131 int idx;
5132
Willy Tarreau7838a792019-08-12 18:42:03 +02005133 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5134
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005135 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005136 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005137 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005138 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005139 goto end;
5140 }
5141
Willy Tarreau98de12a2018-12-12 07:03:00 +01005142 htx = htx_from_buf(buf);
5143
Christopher Faulet54b5e212019-06-04 10:08:28 +02005144 /* We only come here with HTX_BLK_DATA blocks. However, while looping,
5145 * we can meet an HTX_BLK_EOM block that we'll leave to the caller to
5146 * handle.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005147 */
5148
5149 new_frame:
Willy Tarreauee573762018-12-04 15:25:57 +01005150 if (!count || htx_is_empty(htx))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005151 goto end;
5152
5153 idx = htx_get_head(htx);
5154 blk = htx_get_blk(htx, idx);
Christopher Faulet54b5e212019-06-04 10:08:28 +02005155 type = htx_get_blk_type(blk); // DATA or EOM
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005156 bsize = htx_get_blksz(blk);
5157 fsize = bsize;
5158
Christopher Faulet54b5e212019-06-04 10:08:28 +02005159 if (type == HTX_BLK_EOM) {
Willy Tarreau7eeb10a2019-01-04 09:28:17 +01005160 if (h2s->flags & H2_SF_ES_SENT) {
5161 /* ES already sent */
5162 htx_remove_blk(htx, blk);
5163 total++; // EOM counts as one byte
5164 count--;
5165 goto end;
5166 }
5167 }
5168 else if (type != HTX_BLK_DATA)
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005169 goto end;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005170
Willy Tarreau9c218e72019-05-26 10:08:28 +02005171 mbuf = br_tail(h2c->mbuf);
5172 retry:
5173 if (!h2_get_buf(h2c, mbuf)) {
5174 h2c->flags |= H2_CF_MUX_MALLOC;
5175 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005176 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 +02005177 goto end;
5178 }
5179
Willy Tarreau98de12a2018-12-12 07:03:00 +01005180 /* Perform some optimizations to reduce the number of buffer copies.
5181 * First, if the mux's buffer is empty and the htx area contains
5182 * exactly one data block of the same size as the requested count, and
5183 * this count fits within the frame size, the stream's window size, and
5184 * the connection's window size, then it's possible to simply swap the
5185 * caller's buffer with the mux's output buffer and adjust offsets and
5186 * length to match the entire DATA HTX block in the middle. In this
5187 * case we perform a true zero-copy operation from end-to-end. This is
5188 * the situation that happens all the time with large files. Second, if
5189 * this is not possible, but the mux's output buffer is empty, we still
5190 * have an opportunity to avoid the copy to the intermediary buffer, by
5191 * making the intermediary buffer's area point to the output buffer's
5192 * area. In this case we want to skip the HTX header to make sure that
5193 * copies remain aligned and that this operation remains possible all
5194 * the time. This goes for headers, data blocks and any data extracted
5195 * from the HTX blocks.
5196 */
5197 if (unlikely(fsize == count &&
Christopher Faulet192c6a22019-06-11 16:32:24 +02005198 htx_nbblks(htx) == 1 && type == HTX_BLK_DATA &&
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005199 fsize <= h2s_mws(h2s) && fsize <= h2c->mws && fsize <= h2c->mfs)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005200 void *old_area = mbuf->area;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005201
Willy Tarreaubcc45952019-05-26 10:05:50 +02005202 if (b_data(mbuf)) {
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005203 /* Too bad there are data left there. We're willing to memcpy/memmove
5204 * up to 1/4 of the buffer, which means that it's OK to copy a large
5205 * frame into a buffer containing few data if it needs to be realigned,
5206 * and that it's also OK to copy few data without realigning. Otherwise
5207 * we'll pretend the mbuf is full and wait for it to become empty.
Willy Tarreau98de12a2018-12-12 07:03:00 +01005208 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005209 if (fsize + 9 <= b_room(mbuf) &&
5210 (b_data(mbuf) <= b_size(mbuf) / 4 ||
Willy Tarreau7838a792019-08-12 18:42:03 +02005211 (fsize <= b_size(mbuf) / 4 && fsize + 9 <= b_contig_space(mbuf)))) {
5212 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 +01005213 goto copy;
Willy Tarreau7838a792019-08-12 18:42:03 +02005214 }
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005215
Willy Tarreau9c218e72019-05-26 10:08:28 +02005216 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5217 goto retry;
5218
Willy Tarreau98de12a2018-12-12 07:03:00 +01005219 h2c->flags |= H2_CF_MUX_MFULL;
5220 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005221 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 +01005222 goto end;
5223 }
5224
5225 /* map an H2 frame to the HTX block so that we can put the
5226 * frame header there.
5227 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005228 *mbuf = b_make(buf->area, buf->size, sizeof(struct htx) + blk->addr - 9, fsize + 9);
5229 outbuf.area = b_head(mbuf);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005230
5231 /* prepend an H2 DATA frame header just before the DATA block */
5232 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5233 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5234 h2_set_frame_size(outbuf.area, fsize);
5235
5236 /* update windows */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005237 h2s->sws -= fsize;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005238 h2c->mws -= fsize;
5239
5240 /* and exchange with our old area */
5241 buf->area = old_area;
5242 buf->data = buf->head = 0;
5243 total += fsize;
Willy Tarreau7838a792019-08-12 18:42:03 +02005244
5245 TRACE_PROTO("sent H2 DATA frame (zero-copy)", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005246 goto end;
5247 }
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005248
Willy Tarreau98de12a2018-12-12 07:03:00 +01005249 copy:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005250 /* for DATA and EOM we'll have to emit a frame, even if empty */
5251
5252 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005253 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5254 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005255 break;
5256 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005257 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005258 }
5259
5260 if (outbuf.size < 9) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02005261 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5262 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005263 h2c->flags |= H2_CF_MUX_MFULL;
5264 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005265 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005266 goto end;
5267 }
5268
5269 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
5270 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5271 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5272 outbuf.data = 9;
5273
5274 /* we have in <fsize> the exact number of bytes we need to copy from
5275 * the HTX buffer. We need to check this against the connection's and
5276 * the stream's send windows, and to ensure that this fits in the max
5277 * frame size and in the buffer's available space minus 9 bytes (for
5278 * the frame header). The connection's flow control is applied last so
5279 * that we can use a separate list of streams which are immediately
5280 * unblocked on window opening. Note: we don't implement padding.
5281 */
5282
5283 /* EOM is presented with bsize==1 but would lead to the emission of an
5284 * empty frame, thus we force it to zero here.
5285 */
5286 if (type == HTX_BLK_EOM)
5287 bsize = fsize = 0;
5288
5289 if (!fsize)
5290 goto send_empty;
5291
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005292 if (h2s_mws(h2s) <= 0) {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005293 h2s->flags |= H2_SF_BLK_SFCTL;
Willy Tarreauc234ae32019-05-13 17:56:11 +02005294 if (LIST_ADDED(&h2s->list))
Olivier Houchardbfe2a832019-05-10 14:02:21 +02005295 LIST_DEL_INIT(&h2s->list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +02005296 LIST_ADDQ(&h2c->blocked_list, &h2s->list);
Willy Tarreau7838a792019-08-12 18:42:03 +02005297 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 +01005298 goto end;
5299 }
5300
Willy Tarreauee573762018-12-04 15:25:57 +01005301 if (fsize > count)
5302 fsize = count;
5303
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005304 if (fsize > h2s_mws(h2s))
5305 fsize = h2s_mws(h2s); // >0
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005306
5307 if (h2c->mfs && fsize > h2c->mfs)
5308 fsize = h2c->mfs; // >0
5309
5310 if (fsize + 9 > outbuf.size) {
Willy Tarreau455d5682019-05-24 19:42:18 +02005311 /* It doesn't fit at once. If it at least fits once split and
5312 * the amount of data to move is low, let's defragment the
5313 * buffer now.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005314 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005315 if (b_space_wraps(mbuf) &&
5316 (fsize + 9 <= b_room(mbuf)) &&
5317 b_data(mbuf) <= MAX_DATA_REALIGN)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005318 goto realign_again;
5319 fsize = outbuf.size - 9;
5320
5321 if (fsize <= 0) {
5322 /* no need to send an empty frame here */
Willy Tarreau9c218e72019-05-26 10:08:28 +02005323 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5324 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005325 h2c->flags |= H2_CF_MUX_MFULL;
5326 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005327 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005328 goto end;
5329 }
5330 }
5331
5332 if (h2c->mws <= 0) {
5333 h2s->flags |= H2_SF_BLK_MFCTL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005334 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 +01005335 goto end;
5336 }
5337
5338 if (fsize > h2c->mws)
5339 fsize = h2c->mws;
5340
5341 /* now let's copy this this into the output buffer */
5342 memcpy(outbuf.area + 9, htx_get_blk_ptr(htx, blk), fsize);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005343 h2s->sws -= fsize;
Willy Tarreau0f799ca2018-12-04 15:20:11 +01005344 h2c->mws -= fsize;
Willy Tarreauee573762018-12-04 15:25:57 +01005345 count -= fsize;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005346
5347 send_empty:
5348 /* update the frame's size */
5349 h2_set_frame_size(outbuf.area, fsize);
5350
5351 /* FIXME: for now we only set the ES flag on empty DATA frames, once
5352 * meeting EOM. We should optimize this later.
5353 */
5354 if (type == HTX_BLK_EOM) {
Willy Tarreauee573762018-12-04 15:25:57 +01005355 total++; // EOM counts as one byte
5356 count--;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005357 es_now = 1;
5358 }
5359
5360 if (es_now)
5361 outbuf.area[4] |= H2_F_DATA_END_STREAM;
5362
5363 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005364 b_add(mbuf, fsize + 9);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005365
5366 /* consume incoming HTX block, including EOM */
5367 total += fsize;
5368 if (fsize == bsize) {
5369 htx_remove_blk(htx, blk);
Willy Tarreau7838a792019-08-12 18:42:03 +02005370 if (fsize) {
5371 TRACE_DEVEL("more data available, trying to send another frame", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005372 goto new_frame;
Willy Tarreau7838a792019-08-12 18:42:03 +02005373 }
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005374 } else {
5375 /* we've truncated this block */
5376 htx_cut_data_blk(htx, blk, fsize);
5377 }
5378
5379 if (es_now) {
5380 if (h2s->st == H2_SS_OPEN)
5381 h2s->st = H2_SS_HLOC;
5382 else
5383 h2s_close(h2s);
5384
5385 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005386 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 +01005387 }
5388
5389 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005390 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005391 return total;
5392}
5393
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005394/* Try to send a HEADERS frame matching HTX_BLK_TLR series of blocks present in
5395 * HTX message <htx> for the H2 stream <h2s>. Returns the number of bytes
5396 * processed. The caller must check the stream's status to detect any error
5397 * which might have happened subsequently to a successful send. The htx blocks
5398 * are automatically removed from the message. The htx message is assumed to be
5399 * valid since produced from the internal code. Processing stops when meeting
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005400 * the EOM, which is *not* removed. All trailers are processed at once and sent
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005401 * as a single frame. The ES flag is always set.
5402 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005403static size_t h2s_make_trailers(struct h2s *h2s, struct htx *htx)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005404{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005405 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005406 struct h2c *h2c = h2s->h2c;
5407 struct htx_blk *blk;
5408 struct htx_blk *blk_end;
5409 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005410 struct buffer *mbuf;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005411 enum htx_blk_type type;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005412 int ret = 0;
5413 int hdr;
5414 int idx;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005415
Willy Tarreau7838a792019-08-12 18:42:03 +02005416 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5417
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005418 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005419 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005420 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005421 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005422 goto end;
5423 }
5424
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005425 /* determine the first block which must not be deleted, blk_end may
5426 * be NULL if all blocks have to be deleted. also get trailers.
5427 */
5428 idx = htx_get_head(htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005429 blk_end = NULL;
5430
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005431 hdr = 0;
5432 while (idx != -1) {
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005433 blk = htx_get_blk(htx, idx);
5434 type = htx_get_blk_type(blk);
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005435 idx = htx_get_next(htx, idx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005436 if (type == HTX_BLK_UNUSED)
5437 continue;
5438
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005439 if (type == HTX_BLK_EOT) {
5440 if (idx != -1)
5441 blk_end = blk;
5442 break;
5443 }
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005444 if (type != HTX_BLK_TLR)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005445 break;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005446
Willy Tarreau7838a792019-08-12 18:42:03 +02005447 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5448 TRACE_PROTO("too many headers", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005449 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005450 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005451
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005452 list[hdr].n = htx_get_blk_name(htx, blk);
5453 list[hdr].v = htx_get_blk_value(htx, blk);
5454 hdr++;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005455 }
5456
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005457 /* marker for end of trailers */
5458 list[hdr].n = ist("");
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005459
Willy Tarreau9c218e72019-05-26 10:08:28 +02005460 mbuf = br_tail(h2c->mbuf);
5461 retry:
5462 if (!h2_get_buf(h2c, mbuf)) {
5463 h2c->flags |= H2_CF_MUX_MALLOC;
5464 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005465 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 +02005466 goto end;
5467 }
5468
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005469 chunk_reset(&outbuf);
5470
5471 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005472 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5473 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005474 break;
5475 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005476 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005477 }
5478
5479 if (outbuf.size < 9)
5480 goto full;
5481
5482 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4,ES=1 */
5483 memcpy(outbuf.area, "\x00\x00\x00\x01\x05", 5);
5484 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5485 outbuf.data = 9;
5486
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005487 /* encode all headers */
5488 for (idx = 0; idx < hdr; idx++) {
5489 /* these ones do not exist in H2 or must not appear in
5490 * trailers and must be dropped.
5491 */
5492 if (isteq(list[idx].n, ist("host")) ||
5493 isteq(list[idx].n, ist("content-length")) ||
5494 isteq(list[idx].n, ist("connection")) ||
5495 isteq(list[idx].n, ist("proxy-connection")) ||
5496 isteq(list[idx].n, ist("keep-alive")) ||
5497 isteq(list[idx].n, ist("upgrade")) ||
5498 isteq(list[idx].n, ist("te")) ||
5499 isteq(list[idx].n, ist("transfer-encoding")))
5500 continue;
5501
Christopher Faulet86d144c2019-08-14 16:32:25 +02005502 /* Skip all pseudo-headers */
5503 if (*(list[idx].n.ptr) == ':')
5504 continue;
5505
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005506 if (!hpack_encode_header(&outbuf, list[idx].n, list[idx].v)) {
5507 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005508 if (b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005509 goto realign_again;
5510 goto full;
5511 }
5512 }
5513
Willy Tarreau5121e5d2019-05-06 15:13:41 +02005514 if (outbuf.data == 9) {
5515 /* here we have a problem, we have nothing to emit (either we
5516 * received an empty trailers block followed or we removed its
5517 * contents above). Because of this we can't send a HEADERS
5518 * frame, so we have to cheat and instead send an empty DATA
5519 * frame conveying the ES flag.
Willy Tarreau67b8cae2019-02-21 18:16:35 +01005520 */
5521 outbuf.area[3] = H2_FT_DATA;
5522 outbuf.area[4] = H2_F_DATA_END_STREAM;
5523 }
5524
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005525 /* update the frame's size */
5526 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5527
Willy Tarreau572d9f52019-10-11 16:58:37 +02005528 if (outbuf.data > h2c->mfs + 9) {
5529 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5530 /* output full */
5531 if (b_space_wraps(mbuf))
5532 goto realign_again;
5533 goto full;
5534 }
5535 }
5536
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005537 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02005538 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 +02005539 b_add(mbuf, outbuf.data);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005540 h2s->flags |= H2_SF_ES_SENT;
5541
5542 if (h2s->st == H2_SS_OPEN)
5543 h2s->st = H2_SS_HLOC;
5544 else
5545 h2s_close(h2s);
5546
5547 /* OK we could properly deliver the response */
5548 done:
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005549 /* remove all header blocks till the end and compute the corresponding size. */
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005550 ret = 0;
5551 idx = htx_get_head(htx);
5552 blk = htx_get_blk(htx, idx);
5553 while (blk != blk_end) {
5554 ret += htx_get_blksz(blk);
5555 blk = htx_remove_blk(htx, blk);
5556 }
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005557
5558 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
5559 ret += htx_get_blksz(blk_end);
5560 htx_remove_blk(htx, blk_end);
5561 }
5562
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005563 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005564 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005565 return ret;
5566 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005567 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5568 goto retry;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005569 h2c->flags |= H2_CF_MUX_MFULL;
5570 h2s->flags |= H2_SF_BLK_MROOM;
5571 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005572 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 +01005573 goto end;
5574 fail:
5575 /* unparsable HTX messages, too large ones to be produced in the local
5576 * list etc go here (unrecoverable errors).
5577 */
5578 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5579 ret = 0;
5580 goto end;
5581}
5582
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005583/* Called from the upper layer, to subscribe to events, such as being able to send.
5584 * The <param> argument here is supposed to be a pointer to a wait_event struct
5585 * which will be passed to h2s->recv_wait or h2s->send_wait depending on the
5586 * event_type. The event_type must only be a combination of SUB_RETRY_RECV and
5587 * SUB_RETRY_SEND, other values will lead to -1 being returned. It always
5588 * returns 0 except for the error above.
5589 */
Olivier Houchard6ff20392018-07-17 18:46:31 +02005590static int h2_subscribe(struct conn_stream *cs, int event_type, void *param)
5591{
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005592 struct wait_event *sw;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005593 struct h2s *h2s = cs->ctx;
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02005594 struct h2c *h2c = h2s->h2c;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005595
Willy Tarreau7838a792019-08-12 18:42:03 +02005596 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005597 if (event_type & SUB_RETRY_RECV) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005598 TRACE_DEVEL("subscribe(recv)", H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02005599 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005600 BUG_ON(h2s->recv_wait != NULL || (sw->events & SUB_RETRY_RECV));
5601 sw->events |= SUB_RETRY_RECV;
5602 h2s->recv_wait = sw;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005603 event_type &= ~SUB_RETRY_RECV;
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005604 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005605 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005606 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2c->conn, h2s);
Olivier Houchard6ff20392018-07-17 18:46:31 +02005607 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005608 BUG_ON(h2s->send_wait != NULL || (sw->events & SUB_RETRY_SEND));
5609 sw->events |= SUB_RETRY_SEND;
5610 h2s->send_wait = sw;
5611 if (!(h2s->flags & H2_SF_BLK_SFCTL) &&
5612 !LIST_ADDED(&h2s->list)) {
5613 if (h2s->flags & H2_SF_BLK_MFCTL)
5614 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
5615 else
5616 LIST_ADDQ(&h2c->send_list, &h2s->list);
Olivier Houcharde1c6dbc2018-08-01 17:06:43 +02005617 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005618 event_type &= ~SUB_RETRY_SEND;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005619 }
Willy Tarreau7838a792019-08-12 18:42:03 +02005620 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005621 if (event_type != 0)
5622 return -1;
5623 return 0;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005624}
5625
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005626/* Called from the upper layer, to unsubscribe some events (undo h2_subscribe).
5627 * The <param> argument here is supposed to be a pointer to the same wait_event
5628 * struct that was passed to h2_subscribe() otherwise nothing will be changed.
5629 * It always returns zero.
5630 */
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005631static int h2_unsubscribe(struct conn_stream *cs, int event_type, void *param)
5632{
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005633 struct wait_event *sw;
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005634 struct h2s *h2s = cs->ctx;
5635
Willy Tarreau7838a792019-08-12 18:42:03 +02005636 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005637 if (event_type & SUB_RETRY_RECV) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005638 TRACE_DEVEL("unsubscribe(recv)", H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005639 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005640 BUG_ON(h2s->recv_wait != sw);
5641 sw->events &= ~SUB_RETRY_RECV;
5642 h2s->recv_wait = NULL;
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005643 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005644 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005645 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005646 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005647 BUG_ON(h2s->send_wait != sw);
5648 LIST_DEL(&h2s->list);
5649 LIST_INIT(&h2s->list);
5650 sw->events &= ~SUB_RETRY_SEND;
5651 /* We were about to send, make sure it does not happen */
5652 if (LIST_ADDED(&h2s->sending_list) &&
5653 h2s->send_wait != &h2s->wait_event) {
Olivier Houchard5a3671d2019-10-11 16:33:49 +02005654 /* This call should be ok, as only the thread responsible
5655 * for the tasklet should call unsubscribe.
5656 */
Willy Tarreau86eded62019-06-14 14:47:49 +02005657 tasklet_remove_from_tasklet_list(h2s->send_wait->tasklet);
Olivier Houchardf8338152019-05-14 17:50:32 +02005658 LIST_DEL_INIT(&h2s->sending_list);
Olivier Houchardd846c262018-10-19 17:24:29 +02005659 }
Olivier Houchardf8338152019-05-14 17:50:32 +02005660 h2s->send_wait = NULL;
Olivier Houchardd846c262018-10-19 17:24:29 +02005661 }
Willy Tarreau7838a792019-08-12 18:42:03 +02005662 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005663 return 0;
5664}
5665
5666
Olivier Houchard511efea2018-08-16 15:30:32 +02005667/* Called from the upper layer, to receive data */
5668static size_t h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
5669{
Olivier Houchard638b7992018-08-16 15:41:52 +02005670 struct h2s *h2s = cs->ctx;
Willy Tarreau082f5592018-11-25 08:03:32 +01005671 struct h2c *h2c = h2s->h2c;
Willy Tarreau86724e22018-12-01 23:19:43 +01005672 struct htx *h2s_htx = NULL;
5673 struct htx *buf_htx = NULL;
Olivier Houchard511efea2018-08-16 15:30:32 +02005674 size_t ret = 0;
5675
Willy Tarreau7838a792019-08-12 18:42:03 +02005676 TRACE_ENTER(H2_EV_STRM_RECV, h2c->conn, h2s);
5677
Olivier Houchard511efea2018-08-16 15:30:32 +02005678 /* transfer possibly pending data to the upper layer */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005679 h2s_htx = htx_from_buf(&h2s->rxbuf);
5680 if (htx_is_empty(h2s_htx)) {
5681 /* Here htx_to_buf() will set buffer data to 0 because
5682 * the HTX is empty.
5683 */
5684 htx_to_buf(h2s_htx, &h2s->rxbuf);
5685 goto end;
5686 }
Willy Tarreau7196dd62019-03-05 10:51:11 +01005687
Christopher Faulet9b79a102019-07-15 11:22:56 +02005688 ret = h2s_htx->data;
5689 buf_htx = htx_from_buf(buf);
Willy Tarreau7196dd62019-03-05 10:51:11 +01005690
Christopher Faulet9b79a102019-07-15 11:22:56 +02005691 /* <buf> is empty and the message is small enough, swap the
5692 * buffers. */
5693 if (htx_is_empty(buf_htx) && htx_used_space(h2s_htx) <= count) {
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005694 htx_to_buf(buf_htx, buf);
5695 htx_to_buf(h2s_htx, &h2s->rxbuf);
Christopher Faulet9b79a102019-07-15 11:22:56 +02005696 b_xfer(buf, &h2s->rxbuf, b_data(&h2s->rxbuf));
5697 goto end;
Willy Tarreau86724e22018-12-01 23:19:43 +01005698 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02005699
5700 htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_EOM);
5701
5702 if (h2s_htx->flags & HTX_FL_PARSING_ERROR) {
5703 buf_htx->flags |= HTX_FL_PARSING_ERROR;
5704 if (htx_is_empty(buf_htx))
5705 cs->flags |= CS_FL_EOI;
Willy Tarreau86724e22018-12-01 23:19:43 +01005706 }
Olivier Houchard511efea2018-08-16 15:30:32 +02005707
Christopher Faulet9b79a102019-07-15 11:22:56 +02005708 buf_htx->extra = (h2s_htx->extra ? (h2s_htx->data + h2s_htx->extra) : 0);
5709 htx_to_buf(buf_htx, buf);
5710 htx_to_buf(h2s_htx, &h2s->rxbuf);
5711 ret -= h2s_htx->data;
5712
Christopher Faulet37070b22019-02-14 15:12:14 +01005713 end:
Olivier Houchard638b7992018-08-16 15:41:52 +02005714 if (b_data(&h2s->rxbuf))
Olivier Houchardd247be02018-12-06 16:22:29 +01005715 cs->flags |= (CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02005716 else {
Olivier Houchardd247be02018-12-06 16:22:29 +01005717 cs->flags &= ~(CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Christopher Fauletfa922f02019-05-07 10:55:17 +02005718 if (h2s->flags & H2_SF_ES_RCVD)
5719 cs->flags |= CS_FL_EOI;
Willy Tarreau76c83822019-06-15 09:55:50 +02005720 if (conn_xprt_read0_pending(h2c->conn) || h2s->st == H2_SS_CLOSED)
Olivier Houchard511efea2018-08-16 15:30:32 +02005721 cs->flags |= CS_FL_EOS;
Olivier Houchard71748cb2018-12-17 14:16:46 +01005722 if (cs->flags & CS_FL_ERR_PENDING)
5723 cs->flags |= CS_FL_ERROR;
Olivier Houchard638b7992018-08-16 15:41:52 +02005724 if (b_size(&h2s->rxbuf)) {
5725 b_free(&h2s->rxbuf);
5726 offer_buffers(NULL, tasks_run_queue);
5727 }
Olivier Houchard511efea2018-08-16 15:30:32 +02005728 }
5729
Willy Tarreau082f5592018-11-25 08:03:32 +01005730 if (ret && h2c->dsi == h2s->id) {
5731 /* demux is blocking on this stream's buffer */
5732 h2c->flags &= ~H2_CF_DEM_SFULL;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02005733 h2c_restart_reading(h2c, 1);
Willy Tarreau082f5592018-11-25 08:03:32 +01005734 }
Christopher Faulet37070b22019-02-14 15:12:14 +01005735
Willy Tarreau7838a792019-08-12 18:42:03 +02005736 TRACE_LEAVE(H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard511efea2018-08-16 15:30:32 +02005737 return ret;
5738}
5739
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005740/* stops all senders of this connection for example when the mux buffer is full.
5741 * They are moved from the sending_list to either fctl_list or send_list.
5742 */
Olivier Houchardd846c262018-10-19 17:24:29 +02005743static void h2_stop_senders(struct h2c *h2c)
5744{
5745 struct h2s *h2s, *h2s_back;
5746
Olivier Houchardd360ac62019-03-22 17:37:16 +01005747 list_for_each_entry_safe(h2s, h2s_back, &h2c->sending_list, sending_list) {
5748 LIST_DEL_INIT(&h2s->sending_list);
Olivier Houchard5a3671d2019-10-11 16:33:49 +02005749 /* XXX: This won't work when/if streams are running on different
5750 * threads, so we will have to find another way to prevent
5751 * tasklets to run when we can no longer send data. The best
5752 * may be to only wake enough tasklets to fill the buffer.
5753 */
Willy Tarreau86eded62019-06-14 14:47:49 +02005754 tasklet_remove_from_tasklet_list(h2s->send_wait->tasklet);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005755 h2s->send_wait->events |= SUB_RETRY_SEND;
Olivier Houchardd846c262018-10-19 17:24:29 +02005756 }
5757}
5758
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005759/* Called from the upper layer, to send data from buffer <buf> for no more than
5760 * <count> bytes. Returns the number of bytes effectively sent. Some status
5761 * flags may be updated on the conn_stream.
5762 */
Christopher Fauletd44a9b32018-07-27 11:59:41 +02005763static size_t h2_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
Willy Tarreau62f52692017-10-08 23:01:42 +02005764{
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005765 struct h2s *h2s = cs->ctx;
Willy Tarreau1dc41e72018-06-14 13:21:28 +02005766 size_t total = 0;
Willy Tarreau5dd17352018-06-14 13:33:30 +02005767 size_t ret;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005768 struct htx *htx;
5769 struct htx_blk *blk;
5770 enum htx_blk_type btype;
5771 uint32_t bsize;
5772 int32_t idx;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005773
Willy Tarreau7838a792019-08-12 18:42:03 +02005774 TRACE_ENTER(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
5775
Olivier Houchardd360ac62019-03-22 17:37:16 +01005776 /* If we were not just woken because we wanted to send but couldn't,
5777 * and there's somebody else that is waiting to send, do nothing,
5778 * we will subscribe later and be put at the end of the list
5779 */
Willy Tarreauc234ae32019-05-13 17:56:11 +02005780 if (!LIST_ADDED(&h2s->sending_list) &&
Willy Tarreau7838a792019-08-12 18:42:03 +02005781 (!LIST_ISEMPTY(&h2s->h2c->send_list) || !LIST_ISEMPTY(&h2s->h2c->fctl_list))) {
5782 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 +01005783 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005784 }
Olivier Houchard998410a2019-04-15 19:23:37 +02005785 LIST_DEL_INIT(&h2s->sending_list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01005786
Olivier Houchard998410a2019-04-15 19:23:37 +02005787 /* We couldn't set it to NULL before, because we needed it in case
5788 * we had to cancel the tasklet
5789 */
5790 h2s->send_wait = NULL;
5791
Willy Tarreau7838a792019-08-12 18:42:03 +02005792 if (h2s->h2c->st0 < H2_CS_FRAME_H) {
5793 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 +02005794 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005795 }
Willy Tarreau6bf641a2018-10-08 09:43:03 +02005796
Christopher Faulet9b79a102019-07-15 11:22:56 +02005797 htx = htx_from_buf(buf);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005798
Willy Tarreau0bad0432018-06-14 16:54:01 +02005799 if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count)
Willy Tarreauc4312d32017-11-07 12:01:53 +01005800 h2s->flags |= H2_SF_OUTGOING_DATA;
5801
Willy Tarreau751f2d02018-10-05 09:35:00 +02005802 if (h2s->id == 0) {
5803 int32_t id = h2c_get_next_sid(h2s->h2c);
5804
5805 if (id < 0) {
Willy Tarreau751f2d02018-10-05 09:35:00 +02005806 cs->flags |= CS_FL_ERROR;
Willy Tarreau7838a792019-08-12 18:42:03 +02005807 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 +02005808 return 0;
5809 }
5810
5811 eb32_delete(&h2s->by_id);
5812 h2s->by_id.key = h2s->id = id;
5813 h2s->h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01005814 h2s->h2c->nb_reserved--;
Willy Tarreau751f2d02018-10-05 09:35:00 +02005815 eb32_insert(&h2s->h2c->streams_by_id, &h2s->by_id);
5816 }
5817
Christopher Faulet9b79a102019-07-15 11:22:56 +02005818 while (h2s->st < H2_SS_HLOC && !(h2s->flags & H2_SF_BLK_ANY) &&
5819 count && !htx_is_empty(htx)) {
5820 idx = htx_get_head(htx);
5821 blk = htx_get_blk(htx, idx);
5822 btype = htx_get_blk_type(blk);
5823 bsize = htx_get_blksz(blk);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005824
Christopher Faulet9b79a102019-07-15 11:22:56 +02005825 switch (btype) {
Willy Tarreau80739692018-10-05 11:35:57 +02005826 case HTX_BLK_REQ_SL:
5827 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005828 ret = h2s_bck_make_req_headers(h2s, htx);
Willy Tarreau80739692018-10-05 11:35:57 +02005829 if (ret > 0) {
5830 total += ret;
5831 count -= ret;
5832 if (ret < bsize)
5833 goto done;
5834 }
5835 break;
5836
Willy Tarreau115e83b2018-12-01 19:17:53 +01005837 case HTX_BLK_RES_SL:
5838 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005839 ret = h2s_frt_make_resp_headers(h2s, htx);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005840 if (ret > 0) {
5841 total += ret;
5842 count -= ret;
5843 if (ret < bsize)
5844 goto done;
5845 }
5846 break;
5847
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005848 case HTX_BLK_DATA:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005849 case HTX_BLK_EOM:
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005850 /* all these cause the emission of a DATA frame (possibly empty).
5851 * This EOM necessarily is one before trailers, as the EOM following
5852 * trailers would have been consumed by the trailers parser.
5853 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005854 ret = h2s_frt_make_resp_data(h2s, buf, count);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005855 if (ret > 0) {
Willy Tarreau98de12a2018-12-12 07:03:00 +01005856 htx = htx_from_buf(buf);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005857 total += ret;
5858 count -= ret;
5859 if (ret < bsize)
5860 goto done;
5861 }
5862 break;
5863
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005864 case HTX_BLK_TLR:
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005865 case HTX_BLK_EOT:
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005866 /* This is the first trailers block, all the subsequent ones AND
5867 * the EOM will be swallowed by the parser.
5868 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005869 ret = h2s_make_trailers(h2s, htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005870 if (ret > 0) {
5871 total += ret;
5872 count -= ret;
5873 if (ret < bsize)
5874 goto done;
5875 }
5876 break;
5877
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005878 default:
5879 htx_remove_blk(htx, blk);
5880 total += bsize;
5881 count -= bsize;
5882 break;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005883 }
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005884 }
5885
Christopher Faulet9b79a102019-07-15 11:22:56 +02005886 done:
Willy Tarreau2b778482019-05-06 15:00:22 +02005887 if (h2s->st >= H2_SS_HLOC) {
Willy Tarreau00610962018-07-19 10:58:28 +02005888 /* trim any possibly pending data after we close (extra CR-LF,
5889 * unprocessed trailers, abnormal extra data, ...)
5890 */
Willy Tarreau0bad0432018-06-14 16:54:01 +02005891 total += count;
5892 count = 0;
Willy Tarreau00610962018-07-19 10:58:28 +02005893 }
5894
Willy Tarreauc6795ca2017-11-07 09:43:06 +01005895 /* RST are sent similarly to frame acks */
Willy Tarreau02492192017-12-07 15:59:29 +01005896 if (h2s->st == H2_SS_ERROR || h2s->flags & H2_SF_RST_RCVD) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005897 TRACE_DEVEL("reporting RST/error to the app-layer stream", H2_EV_H2S_SEND|H2_EV_H2S_ERR|H2_EV_STRM_ERR, h2s->h2c->conn, h2s);
Willy Tarreauec988c72018-12-19 18:00:29 +01005898 cs_set_error(cs);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01005899 if (h2s_send_rst_stream(h2s->h2c, h2s) > 0)
Willy Tarreau00dd0782018-03-01 16:31:34 +01005900 h2s_close(h2s);
Willy Tarreauc6795ca2017-11-07 09:43:06 +01005901 }
5902
Christopher Faulet9b79a102019-07-15 11:22:56 +02005903 htx_to_buf(htx, buf);
Olivier Houchardd846c262018-10-19 17:24:29 +02005904
5905 /* The mux is full, cancel the pending tasks */
5906 if ((h2s->h2c->flags & H2_CF_MUX_BLOCK_ANY) ||
Willy Tarreau7838a792019-08-12 18:42:03 +02005907 (h2s->flags & H2_SF_BLK_MBUSY)) {
5908 TRACE_DEVEL("mux full, stopping senders", H2_EV_H2S_SEND|H2_EV_H2C_BLK|H2_EV_H2S_BLK, h2s->h2c->conn, h2s);
Olivier Houchardd846c262018-10-19 17:24:29 +02005909 h2_stop_senders(h2s->h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02005910 }
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005911
Olivier Houchard7505f942018-08-21 18:10:44 +02005912 if (total > 0) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005913 if (!(h2s->h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau7838a792019-08-12 18:42:03 +02005914 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 +02005915 tasklet_wakeup(h2s->h2c->wait_event.tasklet);
Olivier Houchardd846c262018-10-19 17:24:29 +02005916
Olivier Houchard7505f942018-08-21 18:10:44 +02005917 }
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01005918 /* If we're waiting for flow control, and we got a shutr on the
5919 * connection, we will never be unlocked, so add an error on
5920 * the conn_stream.
5921 */
5922 if (conn_xprt_read0_pending(h2s->h2c->conn) &&
5923 !b_data(&h2s->h2c->dbuf) &&
5924 (h2s->flags & (H2_SF_BLK_SFCTL | H2_SF_BLK_MFCTL))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005925 TRACE_DEVEL("fctl with shutr, reporting error to app-layer", H2_EV_H2S_SEND|H2_EV_STRM_SEND|H2_EV_STRM_ERR, h2s->h2c->conn, h2s);
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01005926 if (cs->flags & CS_FL_EOS)
5927 cs->flags |= CS_FL_ERROR;
5928 else
5929 cs->flags |= CS_FL_ERR_PENDING;
5930 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02005931
5932 if (total > 0 && !(h2s->flags & H2_SF_BLK_SFCTL)) {
5933 /* Ok we managed to send something, leave the send_list if we were still there */
Olivier Houchardd360ac62019-03-22 17:37:16 +01005934 LIST_DEL_INIT(&h2s->list);
5935 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02005936
Willy Tarreau7838a792019-08-12 18:42:03 +02005937 TRACE_LEAVE(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005938 return total;
Willy Tarreau62f52692017-10-08 23:01:42 +02005939}
5940
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005941/* for debugging with CLI's "show fd" command */
Willy Tarreau83061a82018-07-13 11:56:34 +02005942static void h2_show_fd(struct buffer *msg, struct connection *conn)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005943{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01005944 struct h2c *h2c = conn->ctx;
Willy Tarreau987c0632018-12-18 10:32:05 +01005945 struct h2s *h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005946 struct eb32_node *node;
5947 int fctl_cnt = 0;
5948 int send_cnt = 0;
5949 int tree_cnt = 0;
5950 int orph_cnt = 0;
Willy Tarreau60f62682019-05-26 11:32:27 +02005951 struct buffer *hmbuf, *tmbuf;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005952
5953 if (!h2c)
5954 return;
5955
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005956 list_for_each_entry(h2s, &h2c->fctl_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005957 fctl_cnt++;
5958
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005959 list_for_each_entry(h2s, &h2c->send_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005960 send_cnt++;
5961
Willy Tarreau3af37712018-12-18 14:34:41 +01005962 h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005963 node = eb32_first(&h2c->streams_by_id);
5964 while (node) {
5965 h2s = container_of(node, struct h2s, by_id);
5966 tree_cnt++;
5967 if (!h2s->cs)
5968 orph_cnt++;
5969 node = eb32_next(node);
5970 }
5971
Willy Tarreau60f62682019-05-26 11:32:27 +02005972 hmbuf = br_head(h2c->mbuf);
Willy Tarreaubcc45952019-05-26 10:05:50 +02005973 tmbuf = br_tail(h2c->mbuf);
Willy Tarreauab2ec452019-08-30 07:07:08 +02005974 chunk_appendf(msg, " h2c.st0=%s .err=%d .maxid=%d .lastid=%d .flg=0x%04x"
Willy Tarreau987c0632018-12-18 10:32:05 +01005975 " .nbst=%u .nbcs=%u .fctl_cnt=%d .send_cnt=%d .tree_cnt=%d"
Willy Tarreau60f62682019-05-26 11:32:27 +02005976 " .orph_cnt=%d .sub=%d .dsi=%d .dbuf=%u@%p+%u/%u .msi=%d"
5977 " .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]",
Willy Tarreauab2ec452019-08-30 07:07:08 +02005978 h2c_st_to_str(h2c->st0), h2c->errcode, h2c->max_id, h2c->last_sid, h2c->flags,
Willy Tarreau616ac812018-07-24 14:12:42 +02005979 h2c->nb_streams, h2c->nb_cs, fctl_cnt, send_cnt, tree_cnt, orph_cnt,
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005980 h2c->wait_event.events, h2c->dsi,
Willy Tarreau987c0632018-12-18 10:32:05 +01005981 (unsigned int)b_data(&h2c->dbuf), b_orig(&h2c->dbuf),
5982 (unsigned int)b_head_ofs(&h2c->dbuf), (unsigned int)b_size(&h2c->dbuf),
5983 h2c->msi,
Willy Tarreau60f62682019-05-26 11:32:27 +02005984 br_head_idx(h2c->mbuf), br_tail_idx(h2c->mbuf), br_size(h2c->mbuf),
5985 (unsigned int)b_data(hmbuf), b_orig(hmbuf),
5986 (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf),
Willy Tarreaubcc45952019-05-26 10:05:50 +02005987 (unsigned int)b_data(tmbuf), b_orig(tmbuf),
5988 (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf));
Willy Tarreau987c0632018-12-18 10:32:05 +01005989
5990 if (h2s) {
Willy Tarreauab2ec452019-08-30 07:07:08 +02005991 chunk_appendf(msg, " last_h2s=%p .id=%d .st=%s.flg=0x%04x .rxbuf=%u@%p+%u/%u .cs=%p",
5992 h2s, h2s->id, h2s_st_to_str(h2s->st), h2s->flags,
Willy Tarreau987c0632018-12-18 10:32:05 +01005993 (unsigned int)b_data(&h2s->rxbuf), b_orig(&h2s->rxbuf),
5994 (unsigned int)b_head_ofs(&h2s->rxbuf), (unsigned int)b_size(&h2s->rxbuf),
5995 h2s->cs);
5996 if (h2s->cs)
5997 chunk_appendf(msg, " .cs.flg=0x%08x .cs.data=%p",
5998 h2s->cs->flags, h2s->cs->data);
5999 }
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006000}
Willy Tarreau62f52692017-10-08 23:01:42 +02006001
6002/*******************************************************/
6003/* functions below are dedicated to the config parsers */
6004/*******************************************************/
6005
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006006/* config parser for global "tune.h2.header-table-size" */
6007static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx,
6008 struct proxy *defpx, const char *file, int line,
6009 char **err)
6010{
6011 if (too_many_args(1, args, err, NULL))
6012 return -1;
6013
6014 h2_settings_header_table_size = atoi(args[1]);
6015 if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) {
6016 memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]);
6017 return -1;
6018 }
6019 return 0;
6020}
Willy Tarreau62f52692017-10-08 23:01:42 +02006021
Willy Tarreaue6baec02017-07-27 11:45:11 +02006022/* config parser for global "tune.h2.initial-window-size" */
6023static int h2_parse_initial_window_size(char **args, int section_type, struct proxy *curpx,
6024 struct proxy *defpx, const char *file, int line,
6025 char **err)
6026{
6027 if (too_many_args(1, args, err, NULL))
6028 return -1;
6029
6030 h2_settings_initial_window_size = atoi(args[1]);
6031 if (h2_settings_initial_window_size < 0) {
6032 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6033 return -1;
6034 }
6035 return 0;
6036}
6037
Willy Tarreau5242ef82017-07-27 11:47:28 +02006038/* config parser for global "tune.h2.max-concurrent-streams" */
6039static int h2_parse_max_concurrent_streams(char **args, int section_type, struct proxy *curpx,
6040 struct proxy *defpx, const char *file, int line,
6041 char **err)
6042{
6043 if (too_many_args(1, args, err, NULL))
6044 return -1;
6045
6046 h2_settings_max_concurrent_streams = atoi(args[1]);
Willy Tarreau5a490b62019-01-31 10:39:51 +01006047 if ((int)h2_settings_max_concurrent_streams < 0) {
Willy Tarreau5242ef82017-07-27 11:47:28 +02006048 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6049 return -1;
6050 }
6051 return 0;
6052}
6053
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006054/* config parser for global "tune.h2.max-frame-size" */
6055static int h2_parse_max_frame_size(char **args, int section_type, struct proxy *curpx,
6056 struct proxy *defpx, const char *file, int line,
6057 char **err)
6058{
6059 if (too_many_args(1, args, err, NULL))
6060 return -1;
6061
6062 h2_settings_max_frame_size = atoi(args[1]);
6063 if (h2_settings_max_frame_size < 16384 || h2_settings_max_frame_size > 16777215) {
6064 memprintf(err, "'%s' expects a numeric value between 16384 and 16777215.", args[0]);
6065 return -1;
6066 }
6067 return 0;
6068}
6069
Willy Tarreau62f52692017-10-08 23:01:42 +02006070
6071/****************************************/
6072/* MUX initialization and instanciation */
6073/***************************************/
6074
6075/* The mux operations */
Willy Tarreau680b2bd2018-11-27 07:30:17 +01006076static const struct mux_ops h2_ops = {
Willy Tarreau62f52692017-10-08 23:01:42 +02006077 .init = h2_init,
Olivier Houchard21df6cc2018-09-14 23:21:44 +02006078 .wake = h2_wake,
Willy Tarreau62f52692017-10-08 23:01:42 +02006079 .snd_buf = h2_snd_buf,
Olivier Houchard511efea2018-08-16 15:30:32 +02006080 .rcv_buf = h2_rcv_buf,
Olivier Houchard6ff20392018-07-17 18:46:31 +02006081 .subscribe = h2_subscribe,
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006082 .unsubscribe = h2_unsubscribe,
Willy Tarreau62f52692017-10-08 23:01:42 +02006083 .attach = h2_attach,
Willy Tarreaufafd3982018-11-18 21:29:20 +01006084 .get_first_cs = h2_get_first_cs,
Willy Tarreau62f52692017-10-08 23:01:42 +02006085 .detach = h2_detach,
Olivier Houchard060ed432018-11-06 16:32:42 +01006086 .destroy = h2_destroy,
Olivier Houchardd540b362018-11-05 18:37:53 +01006087 .avail_streams = h2_avail_streams,
Willy Tarreau00f18a32019-01-26 12:19:01 +01006088 .used_streams = h2_used_streams,
Willy Tarreau62f52692017-10-08 23:01:42 +02006089 .shutr = h2_shutr,
6090 .shutw = h2_shutw,
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006091 .show_fd = h2_show_fd,
Christopher Faulet9b79a102019-07-15 11:22:56 +02006092 .flags = MX_FL_CLEAN_ABRT|MX_FL_HTX,
Willy Tarreau62f52692017-10-08 23:01:42 +02006093 .name = "H2",
6094};
6095
Christopher Faulet32f61c02018-04-10 14:33:41 +02006096static struct mux_proto_list mux_proto_h2 =
Christopher Fauletc985f6c2019-07-15 11:42:52 +02006097 { .token = IST("h2"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BOTH, .mux = &h2_ops };
Willy Tarreau62f52692017-10-08 23:01:42 +02006098
Willy Tarreau0108d902018-11-25 19:14:37 +01006099INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2);
6100
Willy Tarreau62f52692017-10-08 23:01:42 +02006101/* config keyword parsers */
6102static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006103 { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size },
Willy Tarreaue6baec02017-07-27 11:45:11 +02006104 { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size },
Willy Tarreau5242ef82017-07-27 11:47:28 +02006105 { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006106 { CFG_GLOBAL, "tune.h2.max-frame-size", h2_parse_max_frame_size },
Willy Tarreau62f52692017-10-08 23:01:42 +02006107 { 0, NULL, NULL }
6108}};
6109
Willy Tarreau0108d902018-11-25 19:14:37 +01006110INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);