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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) */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100135 struct buffer_wait buf_wait; /* wait list for buffer allocations */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200136 struct wait_event wait_event; /* To be used if we're waiting for I/Os */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200137};
138
Willy Tarreau18312642017-10-11 07:57:07 +0200139/* H2 stream state, in h2s->st */
140enum h2_ss {
141 H2_SS_IDLE = 0, // idle
142 H2_SS_RLOC, // reserved(local)
143 H2_SS_RREM, // reserved(remote)
144 H2_SS_OPEN, // open
145 H2_SS_HREM, // half-closed(remote)
146 H2_SS_HLOC, // half-closed(local)
Willy Tarreau96060ba2017-10-16 18:34:34 +0200147 H2_SS_ERROR, // an error needs to be sent using RST_STREAM
Willy Tarreau18312642017-10-11 07:57:07 +0200148 H2_SS_CLOSED, // closed
149 H2_SS_ENTRIES // must be last
150} __attribute__((packed));
151
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200152#define H2_SS_MASK(state) (1UL << (state))
153#define H2_SS_IDLE_BIT (1UL << H2_SS_IDLE)
154#define H2_SS_RLOC_BIT (1UL << H2_SS_RLOC)
155#define H2_SS_RREM_BIT (1UL << H2_SS_RREM)
156#define H2_SS_OPEN_BIT (1UL << H2_SS_OPEN)
157#define H2_SS_HREM_BIT (1UL << H2_SS_HREM)
158#define H2_SS_HLOC_BIT (1UL << H2_SS_HLOC)
159#define H2_SS_ERROR_BIT (1UL << H2_SS_ERROR)
160#define H2_SS_CLOSED_BIT (1UL << H2_SS_CLOSED)
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200161
Willy Tarreau18312642017-10-11 07:57:07 +0200162/* HTTP/2 stream flags (32 bit), in h2s->flags */
163#define H2_SF_NONE 0x00000000
164#define H2_SF_ES_RCVD 0x00000001
165#define H2_SF_ES_SENT 0x00000002
166
167#define H2_SF_RST_RCVD 0x00000004 // received RST_STREAM
168#define H2_SF_RST_SENT 0x00000008 // sent RST_STREAM
169
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200170/* stream flags indicating the reason the stream is blocked */
171#define H2_SF_BLK_MBUSY 0x00000010 // blocked waiting for mux access (transient)
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200172#define H2_SF_BLK_MROOM 0x00000020 // blocked waiting for room in the mux (must be in send list)
173#define H2_SF_BLK_MFCTL 0x00000040 // blocked due to mux fctl (must be in fctl list)
174#define H2_SF_BLK_SFCTL 0x00000080 // blocked due to stream fctl (must be in blocked list)
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200175#define H2_SF_BLK_ANY 0x000000F0 // any of the reasons above
176
Willy Tarreau454f9052017-10-26 19:40:35 +0200177/* stream flags indicating how data is supposed to be sent */
178#define H2_SF_DATA_CLEN 0x00000100 // data sent using content-length
Willy Tarreaud9464162020-01-10 18:25:07 +0100179/* unused flags: 0x00000200, 0x00000400 */
Willy Tarreau454f9052017-10-26 19:40:35 +0200180
Willy Tarreaud9464162020-01-10 18:25:07 +0100181#define H2_SF_NOTIFIED 0x00000800 // a paused stream was notified to try to send again
Willy Tarreau67434202017-11-06 20:20:51 +0100182#define H2_SF_HEADERS_SENT 0x00001000 // a HEADERS frame was sent for this stream
Willy Tarreauc4312d32017-11-07 12:01:53 +0100183#define H2_SF_OUTGOING_DATA 0x00002000 // set whenever we've seen outgoing data
Willy Tarreau67434202017-11-06 20:20:51 +0100184
Willy Tarreau6cc85a52019-01-02 15:49:20 +0100185#define H2_SF_HEADERS_RCVD 0x00004000 // a HEADERS frame was received for this stream
186
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200187#define H2_SF_WANT_SHUTR 0x00008000 // a stream couldn't shutr() (mux full/busy)
188#define H2_SF_WANT_SHUTW 0x00010000 // a stream couldn't shutw() (mux full/busy)
Willy Tarreau3cf69fe2019-05-14 10:44:40 +0200189#define H2_SF_KILL_CONN 0x00020000 // kill the whole connection with this stream
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200190
191
Willy Tarreau18312642017-10-11 07:57:07 +0200192/* H2 stream descriptor, describing the stream as it appears in the H2C, and as
193 * it is being processed in the internal HTTP representation (H1 for now).
194 */
195struct h2s {
196 struct conn_stream *cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +0100197 struct session *sess;
Willy Tarreau18312642017-10-11 07:57:07 +0200198 struct h2c *h2c;
Willy Tarreaua40704a2018-09-11 13:52:04 +0200199 struct h1m h1m; /* request or response parser state for H1 */
Willy Tarreau18312642017-10-11 07:57:07 +0200200 struct eb32_node by_id; /* place in h2c's streams_by_id */
Willy Tarreau18312642017-10-11 07:57:07 +0200201 int32_t id; /* stream ID */
202 uint32_t flags; /* H2_SF_* */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +0200203 int sws; /* stream window size, to be added to the mux's initial window size */
Willy Tarreau18312642017-10-11 07:57:07 +0200204 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
205 enum h2_ss st;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +0200206 uint16_t status; /* HTTP response status */
Willy Tarreau1915ca22019-01-24 11:49:37 +0100207 unsigned long long body_len; /* remaining body length according to content-length if H2_SF_DATA_CLEN */
Olivier Houchard638b7992018-08-16 15:41:52 +0200208 struct buffer rxbuf; /* receive buffer, always valid (buf_empty or real buffer) */
Willy Tarreauf96508a2020-01-10 11:12:48 +0100209 struct wait_event *subs; /* recv wait_event the conn_stream associated is waiting on (via h2_subscribe) */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200210 struct list list; /* To be used when adding in h2c->send_list or h2c->fctl_lsit */
Willy Tarreau5723f292020-01-10 15:16:57 +0100211 struct tasklet *shut_tl; /* deferred shutdown tasklet, to retry to send an RST after we failed to,
212 * in case there's no other subscription to do it */
Willy Tarreau18312642017-10-11 07:57:07 +0200213};
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200214
Willy Tarreauc6405142017-09-21 20:23:50 +0200215/* descriptor for an h2 frame header */
216struct h2_fh {
217 uint32_t len; /* length, host order, 24 bits */
218 uint32_t sid; /* stream id, host order, 31 bits */
219 uint8_t ft; /* frame type */
220 uint8_t ff; /* frame flags */
221};
222
Willy Tarreau12ae2122019-08-08 18:23:12 +0200223/* trace source and events */
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200224static void h2_trace(enum trace_level level, uint64_t mask, \
225 const struct trace_source *src,
226 const struct ist where, const struct ist func,
227 const void *a1, const void *a2, const void *a3, const void *a4);
Willy Tarreau12ae2122019-08-08 18:23:12 +0200228
229/* The event representation is split like this :
230 * strm - application layer
231 * h2s - internal H2 stream
232 * h2c - internal H2 connection
233 * conn - external connection
234 *
235 */
236static const struct trace_event h2_trace_events[] = {
237#define H2_EV_H2C_NEW (1ULL << 0)
Willy Tarreau87951942019-08-30 07:34:36 +0200238 { .mask = H2_EV_H2C_NEW, .name = "h2c_new", .desc = "new H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200239#define H2_EV_H2C_RECV (1ULL << 1)
Willy Tarreau87951942019-08-30 07:34:36 +0200240 { .mask = H2_EV_H2C_RECV, .name = "h2c_recv", .desc = "Rx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200241#define H2_EV_H2C_SEND (1ULL << 2)
Willy Tarreau87951942019-08-30 07:34:36 +0200242 { .mask = H2_EV_H2C_SEND, .name = "h2c_send", .desc = "Tx on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200243#define H2_EV_H2C_FCTL (1ULL << 3)
Willy Tarreau87951942019-08-30 07:34:36 +0200244 { .mask = H2_EV_H2C_FCTL, .name = "h2c_fctl", .desc = "H2 connection flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200245#define H2_EV_H2C_BLK (1ULL << 4)
Willy Tarreau87951942019-08-30 07:34:36 +0200246 { .mask = H2_EV_H2C_BLK, .name = "h2c_blk", .desc = "H2 connection blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200247#define H2_EV_H2C_WAKE (1ULL << 5)
Willy Tarreau87951942019-08-30 07:34:36 +0200248 { .mask = H2_EV_H2C_WAKE, .name = "h2c_wake", .desc = "H2 connection woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200249#define H2_EV_H2C_END (1ULL << 6)
Willy Tarreau87951942019-08-30 07:34:36 +0200250 { .mask = H2_EV_H2C_END, .name = "h2c_end", .desc = "H2 connection terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200251#define H2_EV_H2C_ERR (1ULL << 7)
Willy Tarreau87951942019-08-30 07:34:36 +0200252 { .mask = H2_EV_H2C_ERR, .name = "h2c_err", .desc = "error on H2 connection" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200253#define H2_EV_RX_FHDR (1ULL << 8)
Willy Tarreau87951942019-08-30 07:34:36 +0200254 { .mask = H2_EV_RX_FHDR, .name = "rx_fhdr", .desc = "H2 frame header received" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200255#define H2_EV_RX_FRAME (1ULL << 9)
Willy Tarreau87951942019-08-30 07:34:36 +0200256 { .mask = H2_EV_RX_FRAME, .name = "rx_frame", .desc = "receipt of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200257#define H2_EV_RX_EOI (1ULL << 10)
Willy Tarreau87951942019-08-30 07:34:36 +0200258 { .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 +0200259#define H2_EV_RX_PREFACE (1ULL << 11)
Willy Tarreau87951942019-08-30 07:34:36 +0200260 { .mask = H2_EV_RX_PREFACE, .name = "rx_preface", .desc = "receipt of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200261#define H2_EV_RX_DATA (1ULL << 12)
Willy Tarreau87951942019-08-30 07:34:36 +0200262 { .mask = H2_EV_RX_DATA, .name = "rx_data", .desc = "receipt of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200263#define H2_EV_RX_HDR (1ULL << 13)
Willy Tarreau87951942019-08-30 07:34:36 +0200264 { .mask = H2_EV_RX_HDR, .name = "rx_hdr", .desc = "receipt of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200265#define H2_EV_RX_PRIO (1ULL << 14)
Willy Tarreau87951942019-08-30 07:34:36 +0200266 { .mask = H2_EV_RX_PRIO, .name = "rx_prio", .desc = "receipt of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200267#define H2_EV_RX_RST (1ULL << 15)
Willy Tarreau87951942019-08-30 07:34:36 +0200268 { .mask = H2_EV_RX_RST, .name = "rx_rst", .desc = "receipt of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200269#define H2_EV_RX_SETTINGS (1ULL << 16)
Willy Tarreau87951942019-08-30 07:34:36 +0200270 { .mask = H2_EV_RX_SETTINGS, .name = "rx_settings", .desc = "receipt of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200271#define H2_EV_RX_PUSH (1ULL << 17)
Willy Tarreau87951942019-08-30 07:34:36 +0200272 { .mask = H2_EV_RX_PUSH, .name = "rx_push", .desc = "receipt of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200273#define H2_EV_RX_PING (1ULL << 18)
Willy Tarreau87951942019-08-30 07:34:36 +0200274 { .mask = H2_EV_RX_PING, .name = "rx_ping", .desc = "receipt of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200275#define H2_EV_RX_GOAWAY (1ULL << 19)
Willy Tarreau87951942019-08-30 07:34:36 +0200276 { .mask = H2_EV_RX_GOAWAY, .name = "rx_goaway", .desc = "receipt of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200277#define H2_EV_RX_WU (1ULL << 20)
Willy Tarreau87951942019-08-30 07:34:36 +0200278 { .mask = H2_EV_RX_WU, .name = "rx_wu", .desc = "receipt of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200279#define H2_EV_RX_CONT (1ULL << 21)
Willy Tarreau87951942019-08-30 07:34:36 +0200280 { .mask = H2_EV_RX_CONT, .name = "rx_cont", .desc = "receipt of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200281#define H2_EV_TX_FRAME (1ULL << 22)
Willy Tarreau87951942019-08-30 07:34:36 +0200282 { .mask = H2_EV_TX_FRAME, .name = "tx_frame", .desc = "transmission of any H2 frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200283#define H2_EV_TX_EOI (1ULL << 23)
Willy Tarreau87951942019-08-30 07:34:36 +0200284 { .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 +0200285#define H2_EV_TX_PREFACE (1ULL << 24)
Willy Tarreau87951942019-08-30 07:34:36 +0200286 { .mask = H2_EV_TX_PREFACE, .name = "tx_preface", .desc = "transmission of H2 preface" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200287#define H2_EV_TX_DATA (1ULL << 25)
Willy Tarreau87951942019-08-30 07:34:36 +0200288 { .mask = H2_EV_TX_DATA, .name = "tx_data", .desc = "transmission of H2 DATA frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200289#define H2_EV_TX_HDR (1ULL << 26)
Willy Tarreau87951942019-08-30 07:34:36 +0200290 { .mask = H2_EV_TX_HDR, .name = "tx_hdr", .desc = "transmission of H2 HEADERS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200291#define H2_EV_TX_PRIO (1ULL << 27)
Willy Tarreau87951942019-08-30 07:34:36 +0200292 { .mask = H2_EV_TX_PRIO, .name = "tx_prio", .desc = "transmission of H2 PRIORITY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200293#define H2_EV_TX_RST (1ULL << 28)
Willy Tarreau87951942019-08-30 07:34:36 +0200294 { .mask = H2_EV_TX_RST, .name = "tx_rst", .desc = "transmission of H2 RST_STREAM frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200295#define H2_EV_TX_SETTINGS (1ULL << 29)
Willy Tarreau87951942019-08-30 07:34:36 +0200296 { .mask = H2_EV_TX_SETTINGS, .name = "tx_settings", .desc = "transmission of H2 SETTINGS frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200297#define H2_EV_TX_PUSH (1ULL << 30)
Willy Tarreau87951942019-08-30 07:34:36 +0200298 { .mask = H2_EV_TX_PUSH, .name = "tx_push", .desc = "transmission of H2 PUSH_PROMISE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200299#define H2_EV_TX_PING (1ULL << 31)
Willy Tarreau87951942019-08-30 07:34:36 +0200300 { .mask = H2_EV_TX_PING, .name = "tx_ping", .desc = "transmission of H2 PING frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200301#define H2_EV_TX_GOAWAY (1ULL << 32)
Willy Tarreau87951942019-08-30 07:34:36 +0200302 { .mask = H2_EV_TX_GOAWAY, .name = "tx_goaway", .desc = "transmission of H2 GOAWAY frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200303#define H2_EV_TX_WU (1ULL << 33)
Willy Tarreau87951942019-08-30 07:34:36 +0200304 { .mask = H2_EV_TX_WU, .name = "tx_wu", .desc = "transmission of H2 WINDOW_UPDATE frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200305#define H2_EV_TX_CONT (1ULL << 34)
Willy Tarreau87951942019-08-30 07:34:36 +0200306 { .mask = H2_EV_TX_CONT, .name = "tx_cont", .desc = "transmission of H2 CONTINUATION frame" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200307#define H2_EV_H2S_NEW (1ULL << 35)
Willy Tarreau87951942019-08-30 07:34:36 +0200308 { .mask = H2_EV_H2S_NEW, .name = "h2s_new", .desc = "new H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200309#define H2_EV_H2S_RECV (1ULL << 36)
Willy Tarreau87951942019-08-30 07:34:36 +0200310 { .mask = H2_EV_H2S_RECV, .name = "h2s_recv", .desc = "Rx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200311#define H2_EV_H2S_SEND (1ULL << 37)
Willy Tarreau87951942019-08-30 07:34:36 +0200312 { .mask = H2_EV_H2S_SEND, .name = "h2s_send", .desc = "Tx for H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200313#define H2_EV_H2S_FCTL (1ULL << 38)
Willy Tarreau87951942019-08-30 07:34:36 +0200314 { .mask = H2_EV_H2S_FCTL, .name = "h2s_fctl", .desc = "H2 stream flow-controlled" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200315#define H2_EV_H2S_BLK (1ULL << 39)
Willy Tarreau87951942019-08-30 07:34:36 +0200316 { .mask = H2_EV_H2S_BLK, .name = "h2s_blk", .desc = "H2 stream blocked" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200317#define H2_EV_H2S_WAKE (1ULL << 40)
Willy Tarreau87951942019-08-30 07:34:36 +0200318 { .mask = H2_EV_H2S_WAKE, .name = "h2s_wake", .desc = "H2 stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200319#define H2_EV_H2S_END (1ULL << 41)
Willy Tarreau87951942019-08-30 07:34:36 +0200320 { .mask = H2_EV_H2S_END, .name = "h2s_end", .desc = "H2 stream terminated" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200321#define H2_EV_H2S_ERR (1ULL << 42)
Willy Tarreau87951942019-08-30 07:34:36 +0200322 { .mask = H2_EV_H2S_ERR, .name = "h2s_err", .desc = "error on H2 stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200323#define H2_EV_STRM_NEW (1ULL << 43)
Willy Tarreau87951942019-08-30 07:34:36 +0200324 { .mask = H2_EV_STRM_NEW, .name = "strm_new", .desc = "app-layer stream creation" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200325#define H2_EV_STRM_RECV (1ULL << 44)
Willy Tarreau87951942019-08-30 07:34:36 +0200326 { .mask = H2_EV_STRM_RECV, .name = "strm_recv", .desc = "receiving data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200327#define H2_EV_STRM_SEND (1ULL << 45)
Willy Tarreau87951942019-08-30 07:34:36 +0200328 { .mask = H2_EV_STRM_SEND, .name = "strm_send", .desc = "sending data for stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200329#define H2_EV_STRM_FULL (1ULL << 46)
Willy Tarreau87951942019-08-30 07:34:36 +0200330 { .mask = H2_EV_STRM_FULL, .name = "strm_full", .desc = "stream buffer full" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200331#define H2_EV_STRM_WAKE (1ULL << 47)
Willy Tarreau87951942019-08-30 07:34:36 +0200332 { .mask = H2_EV_STRM_WAKE, .name = "strm_wake", .desc = "stream woken up" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200333#define H2_EV_STRM_SHUT (1ULL << 48)
Willy Tarreau87951942019-08-30 07:34:36 +0200334 { .mask = H2_EV_STRM_SHUT, .name = "strm_shut", .desc = "stream shutdown" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200335#define H2_EV_STRM_END (1ULL << 49)
Willy Tarreau87951942019-08-30 07:34:36 +0200336 { .mask = H2_EV_STRM_END, .name = "strm_end", .desc = "detaching app-layer stream" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200337#define H2_EV_STRM_ERR (1ULL << 50)
Willy Tarreau87951942019-08-30 07:34:36 +0200338 { .mask = H2_EV_STRM_ERR, .name = "strm_err", .desc = "stream error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200339#define H2_EV_PROTO_ERR (1ULL << 51)
Willy Tarreau87951942019-08-30 07:34:36 +0200340 { .mask = H2_EV_PROTO_ERR, .name = "proto_err", .desc = "protocol error" },
Willy Tarreau12ae2122019-08-08 18:23:12 +0200341 { }
342};
343
344static const struct name_desc h2_trace_lockon_args[4] = {
345 /* arg1 */ { /* already used by the connection */ },
346 /* arg2 */ { .name="h2s", .desc="H2 stream" },
347 /* arg3 */ { },
348 /* arg4 */ { }
349};
350
351static const struct name_desc h2_trace_decoding[] = {
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200352#define H2_VERB_CLEAN 1
353 { .name="clean", .desc="only user-friendly stuff, generally suitable for level \"user\"" },
354#define H2_VERB_MINIMAL 2
Willy Tarreau12ae2122019-08-08 18:23:12 +0200355 { .name="minimal", .desc="report only h2c/h2s state and flags, no real decoding" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200356#define H2_VERB_SIMPLE 3
Willy Tarreau12ae2122019-08-08 18:23:12 +0200357 { .name="simple", .desc="add request/response status line or frame info when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200358#define H2_VERB_ADVANCED 4
Willy Tarreau12ae2122019-08-08 18:23:12 +0200359 { .name="advanced", .desc="add header fields or frame decoding when available" },
Willy Tarreauf7dd5192019-08-30 07:21:18 +0200360#define H2_VERB_COMPLETE 5
Willy Tarreau12ae2122019-08-08 18:23:12 +0200361 { .name="complete", .desc="add full data dump when available" },
362 { /* end */ }
363};
364
365static struct trace_source trace_h2 = {
366 .name = IST("h2"),
367 .desc = "HTTP/2 multiplexer",
368 .arg_def = TRC_ARG1_CONN, // TRACE()'s first argument is always a connection
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200369 .default_cb = h2_trace,
Willy Tarreau12ae2122019-08-08 18:23:12 +0200370 .known_events = h2_trace_events,
371 .lockon_args = h2_trace_lockon_args,
372 .decoding = h2_trace_decoding,
373 .report_events = ~0, // report everything by default
374};
375
376#define TRACE_SOURCE &trace_h2
377INITCALL1(STG_REGISTER, trace_register_source, TRACE_SOURCE);
378
Willy Tarreau8ceae722018-11-26 11:58:30 +0100379/* the h2c connection pool */
380DECLARE_STATIC_POOL(pool_head_h2c, "h2c", sizeof(struct h2c));
381
382/* the h2s stream pool */
383DECLARE_STATIC_POOL(pool_head_h2s, "h2s", sizeof(struct h2s));
384
Willy Tarreaudc572362018-12-12 08:08:05 +0100385/* The default connection window size is 65535, it may only be enlarged using
386 * a WINDOW_UPDATE message. Since the window must never be larger than 2G-1,
387 * we'll pretend we already received the difference between the two to send
388 * an equivalent window update to enlarge it to 2G-1.
389 */
390#define H2_INITIAL_WINDOW_INCREMENT ((1U<<31)-1 - 65535)
391
Willy Tarreau455d5682019-05-24 19:42:18 +0200392/* maximum amount of data we're OK with re-aligning for buffer optimizations */
393#define MAX_DATA_REALIGN 1024
394
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200395/* a few settings from the global section */
396static int h2_settings_header_table_size = 4096; /* initial value */
Willy Tarreaue6baec02017-07-27 11:45:11 +0200397static int h2_settings_initial_window_size = 65535; /* initial value */
Willy Tarreau5a490b62019-01-31 10:39:51 +0100398static unsigned int h2_settings_max_concurrent_streams = 100;
Willy Tarreaua24b35c2019-02-21 13:24:36 +0100399static int h2_settings_max_frame_size = 0; /* unset */
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200400
Willy Tarreau2a856182017-05-16 15:20:39 +0200401/* a dmumy closed stream */
402static const struct h2s *h2_closed_stream = &(const struct h2s){
403 .cs = NULL,
404 .h2c = NULL,
405 .st = H2_SS_CLOSED,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100406 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreauab837502017-12-27 15:07:30 +0100407 .flags = H2_SF_RST_RCVD,
Willy Tarreau2a856182017-05-16 15:20:39 +0200408 .id = 0,
409};
410
Willy Tarreauecb9dcd2019-01-03 12:00:17 +0100411/* a dmumy closed stream returning a PROTOCOL_ERROR error */
412static const struct h2s *h2_error_stream = &(const struct h2s){
413 .cs = NULL,
414 .h2c = NULL,
415 .st = H2_SS_CLOSED,
416 .errcode = H2_ERR_PROTOCOL_ERROR,
417 .flags = 0,
418 .id = 0,
419};
420
Willy Tarreau8d0d58b2018-12-23 18:29:12 +0100421/* a dmumy closed stream returning a REFUSED_STREAM error */
422static const struct h2s *h2_refused_stream = &(const struct h2s){
423 .cs = NULL,
424 .h2c = NULL,
425 .st = H2_SS_CLOSED,
426 .errcode = H2_ERR_REFUSED_STREAM,
427 .flags = 0,
428 .id = 0,
429};
430
Willy Tarreau2a856182017-05-16 15:20:39 +0200431/* and a dummy idle stream for use with any unannounced stream */
432static const struct h2s *h2_idle_stream = &(const struct h2s){
433 .cs = NULL,
434 .h2c = NULL,
435 .st = H2_SS_IDLE,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100436 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreau2a856182017-05-16 15:20:39 +0200437 .id = 0,
438};
439
Olivier Houchard9f6af332018-05-25 14:04:04 +0200440static struct task *h2_timeout_task(struct task *t, void *context, unsigned short state);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +0200441static int h2_send(struct h2c *h2c);
442static int h2_recv(struct h2c *h2c);
Olivier Houchard7505f942018-08-21 18:10:44 +0200443static int h2_process(struct h2c *h2c);
Olivier Houchard29fb89d2018-08-02 18:56:36 +0200444static struct task *h2_io_cb(struct task *t, void *ctx, unsigned short state);
Willy Tarreau0b559072018-02-26 15:22:17 +0100445static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id);
Willy Tarreau4790f7c2019-01-24 11:33:02 +0100446static 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 +0100447static int h2_frt_transfer_data(struct h2s *h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +0200448static struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned short state);
Olivier Houchardf502aca2018-12-14 19:42:40 +0100449static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess);
Willy Tarreau8b2757c2018-12-19 17:36:48 +0100450static void h2s_alert(struct h2s *h2s);
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200451
Willy Tarreauab2ec452019-08-30 07:07:08 +0200452/* returns a h2c state as an abbreviated 3-letter string, or "???" if unknown */
453static inline const char *h2c_st_to_str(enum h2_cs st)
454{
455 switch (st) {
456 case H2_CS_PREFACE: return "PRF";
457 case H2_CS_SETTINGS1: return "STG";
458 case H2_CS_FRAME_H: return "FRH";
459 case H2_CS_FRAME_P: return "FRP";
460 case H2_CS_FRAME_A: return "FRA";
461 case H2_CS_FRAME_E: return "FRE";
462 case H2_CS_ERROR: return "ERR";
463 case H2_CS_ERROR2: return "ER2";
464 default: return "???";
465 }
466}
467
468/* returns a h2s state as an abbreviated 3-letter string, or "???" if unknown */
469static inline const char *h2s_st_to_str(enum h2_ss st)
470{
471 switch (st) {
472 case H2_SS_IDLE: return "IDL"; // idle
473 case H2_SS_RLOC: return "RSL"; // reserved local
474 case H2_SS_RREM: return "RSR"; // reserved remote
475 case H2_SS_OPEN: return "OPN"; // open
476 case H2_SS_HREM: return "HCR"; // half-closed remote
477 case H2_SS_HLOC: return "HCL"; // half-closed local
478 case H2_SS_ERROR : return "ERR"; // error
479 case H2_SS_CLOSED: return "CLO"; // closed
480 default: return "???";
481 }
482}
483
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200484/* the H2 traces always expect that arg1, if non-null, is of type connection
485 * (from which we can derive h2c), that arg2, if non-null, is of type h2s, and
486 * that arg3, if non-null, is either of type htx for tx headers, or of type
487 * buffer for everything else.
488 */
489static void h2_trace(enum trace_level level, uint64_t mask, const struct trace_source *src,
490 const struct ist where, const struct ist func,
491 const void *a1, const void *a2, const void *a3, const void *a4)
492{
493 const struct connection *conn = a1;
494 const struct h2c *h2c = conn ? conn->ctx : NULL;
495 const struct h2s *h2s = a2;
496 const struct buffer *buf = a3;
497 const struct htx *htx;
498 int pos;
499
500 if (!h2c) // nothing to add
501 return;
502
Willy Tarreau17104d42019-08-30 07:12:55 +0200503 if (src->verbosity > H2_VERB_CLEAN) {
Willy Tarreau73db4342019-09-25 07:28:44 +0200504 chunk_appendf(&trace_buf, " : h2c=%p(%c,%s)", h2c, conn_is_back(conn) ? 'B' : 'F', h2c_st_to_str(h2c->st0));
505
Willy Tarreauf3ce0412019-11-24 14:57:00 +0100506 if (h2c->errcode)
507 chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2c->errcode), h2c->errcode);
508
Willy Tarreau73db4342019-09-25 07:28:44 +0200509 if (h2c->dsi >= 0 &&
510 (mask & (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) == (H2_EV_RX_FRAME|H2_EV_RX_FHDR)) {
511 chunk_appendf(&trace_buf, " dft=%s/%02x", h2_ft_str(h2c->dft), h2c->dff);
512 }
513
514 if (h2s) {
515 if (h2s->id <= 0)
516 chunk_appendf(&trace_buf, " dsi=%d", h2c->dsi);
517 chunk_appendf(&trace_buf, " h2s=%p(%d,%s)", h2s, h2s->id, h2s_st_to_str(h2s->st));
Willy Tarreauf3ce0412019-11-24 14:57:00 +0100518 if (h2s->id && h2s->errcode)
519 chunk_appendf(&trace_buf, " err=%s/%02x", h2_err_str(h2s->errcode), h2s->errcode);
Willy Tarreau73db4342019-09-25 07:28:44 +0200520 }
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200521 }
522
523 /* Let's dump decoded requests and responses right after parsing. They
524 * are traced at level USER with a few recognizable flags.
525 */
526 if ((mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW) ||
527 mask == (H2_EV_RX_FRAME|H2_EV_RX_HDR)) && buf)
528 htx = htxbuf(buf); // recv req/res
529 else if (mask == (H2_EV_TX_FRAME|H2_EV_TX_HDR))
530 htx = a3; // send req/res
531 else
532 htx = NULL;
533
Willy Tarreau94f1dcf2019-08-30 07:11:30 +0200534 if (level == TRACE_LEVEL_USER && src->verbosity != H2_VERB_MINIMAL && htx && (pos = htx_get_head(htx)) != -1) {
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200535 const struct htx_blk *blk = htx_get_blk(htx, pos);
536 const struct htx_sl *sl = htx_get_blk_ptr(htx, blk);
537 enum htx_blk_type type = htx_get_blk_type(blk);
538
539 if (type == HTX_BLK_REQ_SL)
540 chunk_appendf(&trace_buf, " : [%d] H2 REQ: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200541 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200542 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
543 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
544 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
545 else if (type == HTX_BLK_RES_SL)
546 chunk_appendf(&trace_buf, " : [%d] H2 RES: %.*s %.*s %.*s",
Willy Tarreauc067a3a2019-08-30 07:28:24 +0200547 h2s ? h2s->id : h2c->dsi,
Willy Tarreaudb3cfff2019-08-19 17:56:27 +0200548 HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
549 HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
550 HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
551 }
552}
553
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200554/* returns true if the connection is allowed to expire, false otherwise. A
555 * connection may expire when:
556 * - it has no stream
557 * - it has data in the mux buffer
558 * - it has streams in the blocked list
559 * - it has streams in the fctl list
560 * - it has streams in the send list
561 * Otherwise it means some streams are waiting in the data layer and it should
562 * not expire.
563 */
564static inline int h2c_may_expire(const struct h2c *h2c)
565{
566 return eb_is_empty(&h2c->streams_by_id) ||
567 br_data(h2c->mbuf) ||
568 !LIST_ISEMPTY(&h2c->blocked_list) ||
569 !LIST_ISEMPTY(&h2c->fctl_list) ||
Willy Tarreaud9464162020-01-10 18:25:07 +0100570 !LIST_ISEMPTY(&h2c->send_list);
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200571}
572
Olivier Houchard7a977432019-03-21 15:47:13 +0100573static __inline int
Willy Tarreauc2ea47f2019-10-01 10:12:00 +0200574h2c_is_dead(const struct h2c *h2c)
Olivier Houchard7a977432019-03-21 15:47:13 +0100575{
576 if (eb_is_empty(&h2c->streams_by_id) && /* don't close if streams exist */
577 ((h2c->conn->flags & CO_FL_ERROR) || /* errors close immediately */
578 (h2c->st0 >= H2_CS_ERROR && !h2c->task) || /* a timeout stroke earlier */
579 (!(h2c->conn->owner)) || /* Nobody's left to take care of the connection, drop it now */
Willy Tarreau662fafc2019-05-26 09:43:07 +0200580 (!br_data(h2c->mbuf) && /* mux buffer empty, also process clean events below */
Olivier Houchard7a977432019-03-21 15:47:13 +0100581 (conn_xprt_read0_pending(h2c->conn) ||
582 (h2c->last_sid >= 0 && h2c->max_id >= h2c->last_sid)))))
583 return 1;
584
585 return 0;
Olivier Houchard7a977432019-03-21 15:47:13 +0100586}
587
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200588/*****************************************************/
589/* functions below are for dynamic buffer management */
590/*****************************************************/
591
Willy Tarreau315d8072017-12-10 22:17:57 +0100592/* indicates whether or not the we may call the h2_recv() function to attempt
593 * to receive data into the buffer and/or demux pending data. The condition is
594 * a bit complex due to some API limits for now. The rules are the following :
595 * - if an error or a shutdown was detected on the connection and the buffer
596 * is empty, we must not attempt to receive
597 * - if the demux buf failed to be allocated, we must not try to receive and
598 * we know there is nothing pending
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100599 * - if no flag indicates a blocking condition, we may attempt to receive,
600 * regardless of whether the demux buffer is full or not, so that only
601 * de demux part decides whether or not to block. This is needed because
602 * the connection API indeed prevents us from re-enabling receipt that is
603 * already enabled in a polled state, so we must always immediately stop
604 * as soon as the demux can't proceed so as never to hit an end of read
605 * with data pending in the buffers.
Willy Tarreau315d8072017-12-10 22:17:57 +0100606 * - otherwise must may not attempt
607 */
608static inline int h2_recv_allowed(const struct h2c *h2c)
609{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200610 if (b_data(&h2c->dbuf) == 0 &&
Willy Tarreau315d8072017-12-10 22:17:57 +0100611 (h2c->st0 >= H2_CS_ERROR ||
612 h2c->conn->flags & CO_FL_ERROR ||
613 conn_xprt_read0_pending(h2c->conn)))
614 return 0;
615
616 if (!(h2c->flags & H2_CF_DEM_DALLOC) &&
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100617 !(h2c->flags & H2_CF_DEM_BLOCK_ANY))
Willy Tarreau315d8072017-12-10 22:17:57 +0100618 return 1;
619
620 return 0;
621}
622
Willy Tarreau47b515a2018-12-21 16:09:41 +0100623/* restarts reading on the connection if it was not enabled */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200624static inline void h2c_restart_reading(const struct h2c *h2c, int consider_buffer)
Willy Tarreau47b515a2018-12-21 16:09:41 +0100625{
626 if (!h2_recv_allowed(h2c))
627 return;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200628 if ((!consider_buffer || !b_data(&h2c->dbuf))
629 && (h2c->wait_event.events & SUB_RETRY_RECV))
Willy Tarreau47b515a2018-12-21 16:09:41 +0100630 return;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200631 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau47b515a2018-12-21 16:09:41 +0100632}
633
634
Willy Tarreaufa1d3572019-01-31 10:31:51 +0100635/* returns true if the front connection has too many conn_streams attached */
636static inline int h2_frt_has_too_many_cs(const struct h2c *h2c)
Willy Tarreauf2101912018-07-19 10:11:38 +0200637{
Willy Tarreaua8754662018-12-23 20:43:58 +0100638 return h2c->nb_cs > h2_settings_max_concurrent_streams;
Willy Tarreauf2101912018-07-19 10:11:38 +0200639}
640
Willy Tarreau44e973f2018-03-01 17:49:30 +0100641/* Tries to grab a buffer and to re-enable processing on mux <target>. The h2c
642 * flags are used to figure what buffer was requested. It returns 1 if the
643 * allocation succeeds, in which case the connection is woken up, or 0 if it's
644 * impossible to wake up and we prefer to be woken up later.
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200645 */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100646static int h2_buf_available(void *target)
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200647{
648 struct h2c *h2c = target;
Willy Tarreau0b559072018-02-26 15:22:17 +0100649 struct h2s *h2s;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200650
Willy Tarreau44e973f2018-03-01 17:49:30 +0100651 if ((h2c->flags & H2_CF_DEM_DALLOC) && b_alloc_margin(&h2c->dbuf, 0)) {
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200652 h2c->flags &= ~H2_CF_DEM_DALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200653 h2c_restart_reading(h2c, 1);
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200654 return 1;
655 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200656
Willy Tarreau51330962019-05-26 09:38:07 +0200657 if ((h2c->flags & H2_CF_MUX_MALLOC) && b_alloc_margin(br_tail(h2c->mbuf), 0)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100658 h2c->flags &= ~H2_CF_MUX_MALLOC;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200659
660 if (h2c->flags & H2_CF_DEM_MROOM) {
661 h2c->flags &= ~H2_CF_DEM_MROOM;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200662 h2c_restart_reading(h2c, 1);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200663 }
Willy Tarreau14398122017-09-22 14:26:04 +0200664 return 1;
665 }
Willy Tarreau0b559072018-02-26 15:22:17 +0100666
667 if ((h2c->flags & H2_CF_DEM_SALLOC) &&
668 (h2s = h2c_st_by_id(h2c, h2c->dsi)) && h2s->cs &&
Olivier Houchard638b7992018-08-16 15:41:52 +0200669 b_alloc_margin(&h2s->rxbuf, 0)) {
Willy Tarreau0b559072018-02-26 15:22:17 +0100670 h2c->flags &= ~H2_CF_DEM_SALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200671 h2c_restart_reading(h2c, 1);
Willy Tarreau0b559072018-02-26 15:22:17 +0100672 return 1;
673 }
674
Willy Tarreau14398122017-09-22 14:26:04 +0200675 return 0;
676}
677
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200678static inline struct buffer *h2_get_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200679{
680 struct buffer *buf = NULL;
681
Willy Tarreauc234ae32019-05-13 17:56:11 +0200682 if (likely(!LIST_ADDED(&h2c->buf_wait.list)) &&
Willy Tarreau44e973f2018-03-01 17:49:30 +0100683 unlikely((buf = b_alloc_margin(bptr, 0)) == NULL)) {
684 h2c->buf_wait.target = h2c;
685 h2c->buf_wait.wakeup_cb = h2_buf_available;
Christopher Faulet2a944ee2017-11-07 10:42:54 +0100686 HA_SPIN_LOCK(BUF_WQ_LOCK, &buffer_wq_lock);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100687 LIST_ADDQ(&buffer_wq, &h2c->buf_wait.list);
Christopher Faulet2a944ee2017-11-07 10:42:54 +0100688 HA_SPIN_UNLOCK(BUF_WQ_LOCK, &buffer_wq_lock);
Willy Tarreau14398122017-09-22 14:26:04 +0200689 }
690 return buf;
691}
692
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200693static inline void h2_release_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200694{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200695 if (bptr->size) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100696 b_free(bptr);
Willy Tarreau201840a2019-05-29 17:50:48 +0200697 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau14398122017-09-22 14:26:04 +0200698 }
699}
700
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200701static inline void h2_release_mbuf(struct h2c *h2c)
702{
703 struct buffer *buf;
704 unsigned int count = 0;
705
706 while (b_size(buf = br_head_pick(h2c->mbuf))) {
707 b_free(buf);
708 count++;
709 }
710 if (count)
Willy Tarreau201840a2019-05-29 17:50:48 +0200711 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200712}
713
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100714/* returns the number of allocatable outgoing streams for the connection taking
715 * the last_sid and the reserved ones into account.
716 */
717static inline int h2_streams_left(const struct h2c *h2c)
718{
719 int ret;
720
721 /* consider the number of outgoing streams we're allowed to create before
722 * reaching the last GOAWAY frame seen. max_id is the last assigned id,
723 * nb_reserved is the number of streams which don't yet have an ID.
724 */
725 ret = (h2c->last_sid >= 0) ? h2c->last_sid : 0x7FFFFFFF;
726 ret = (unsigned int)(ret - h2c->max_id) / 2 - h2c->nb_reserved - 1;
727 if (ret < 0)
728 ret = 0;
729 return ret;
730}
731
Willy Tarreau00f18a32019-01-26 12:19:01 +0100732/* returns the number of streams in use on a connection to figure if it's
733 * idle or not. We check nb_cs and not nb_streams as the caller will want
734 * to know if it was the last one after a detach().
735 */
736static int h2_used_streams(struct connection *conn)
737{
738 struct h2c *h2c = conn->ctx;
739
740 return h2c->nb_cs;
741}
742
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100743/* returns the number of concurrent streams available on the connection */
Olivier Houchardd540b362018-11-05 18:37:53 +0100744static int h2_avail_streams(struct connection *conn)
745{
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100746 struct server *srv = objt_server(conn->target);
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100747 struct h2c *h2c = conn->ctx;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100748 int ret1, ret2;
Olivier Houchardd540b362018-11-05 18:37:53 +0100749
Willy Tarreau6afec462019-01-28 06:40:19 +0100750 /* RFC7540#6.8: Receivers of a GOAWAY frame MUST NOT open additional
751 * streams on the connection.
752 */
753 if (h2c->last_sid >= 0)
754 return 0;
755
Willy Tarreauc61966f2019-10-31 15:10:03 +0100756 if (h2c->st0 >= H2_CS_ERROR)
757 return 0;
758
Willy Tarreau86949782019-01-31 10:42:05 +0100759 /* note: may be negative if a SETTINGS frame changes the limit */
760 ret1 = h2c->streams_limit - h2c->nb_streams;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100761
762 /* we must also consider the limit imposed by stream IDs */
763 ret2 = h2_streams_left(h2c);
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100764 ret1 = MIN(ret1, ret2);
Willy Tarreau86949782019-01-31 10:42:05 +0100765 if (ret1 > 0 && srv && srv->max_reuse >= 0) {
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100766 ret2 = h2c->stream_cnt <= srv->max_reuse ? srv->max_reuse - h2c->stream_cnt + 1: 0;
767 ret1 = MIN(ret1, ret2);
768 }
769 return ret1;
Olivier Houchardd540b362018-11-05 18:37:53 +0100770}
771
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200772
Willy Tarreau62f52692017-10-08 23:01:42 +0200773/*****************************************************************/
774/* functions below are dedicated to the mux setup and management */
775/*****************************************************************/
776
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200777/* Initialize the mux once it's attached. For outgoing connections, the context
778 * is already initialized before installing the mux, so we detect incoming
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200779 * connections from the fact that the context is still NULL (even during mux
780 * upgrades). <input> is always used as Input buffer and may contain data. It is
781 * the caller responsibility to not reuse it anymore. Returns < 0 on error.
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200782 */
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200783static int h2_init(struct connection *conn, struct proxy *prx, struct session *sess,
784 struct buffer *input)
Willy Tarreau32218eb2017-09-22 08:07:25 +0200785{
786 struct h2c *h2c;
Willy Tarreauea392822017-10-31 10:02:25 +0100787 struct task *t = NULL;
Christopher Fauletf81ef032019-10-04 15:19:43 +0200788 void *conn_ctx = conn->ctx;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200789
Christopher Fauletf81ef032019-10-04 15:19:43 +0200790 TRACE_ENTER(H2_EV_H2C_NEW);
Willy Tarreau7838a792019-08-12 18:42:03 +0200791
Willy Tarreaubafbe012017-11-24 17:34:44 +0100792 h2c = pool_alloc(pool_head_h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200793 if (!h2c)
mildiscd2d7de2018-10-02 16:44:18 +0200794 goto fail_no_h2c;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200795
Christopher Faulete9b70722019-04-08 10:46:02 +0200796 if (conn_is_back(conn)) {
Willy Tarreau01b44822018-10-03 14:26:37 +0200797 h2c->flags = H2_CF_IS_BACK;
798 h2c->shut_timeout = h2c->timeout = prx->timeout.server;
799 if (tick_isset(prx->timeout.serverfin))
800 h2c->shut_timeout = prx->timeout.serverfin;
801 } else {
802 h2c->flags = H2_CF_NONE;
803 h2c->shut_timeout = h2c->timeout = prx->timeout.client;
804 if (tick_isset(prx->timeout.clientfin))
805 h2c->shut_timeout = prx->timeout.clientfin;
806 }
Willy Tarreau3f133572017-10-31 19:21:06 +0100807
Willy Tarreau0b37d652018-10-03 10:33:02 +0200808 h2c->proxy = prx;
Willy Tarreau33400292017-11-05 11:23:40 +0100809 h2c->task = NULL;
Willy Tarreau3f133572017-10-31 19:21:06 +0100810 if (tick_isset(h2c->timeout)) {
811 t = task_new(tid_bit);
812 if (!t)
813 goto fail;
814
815 h2c->task = t;
816 t->process = h2_timeout_task;
817 t->context = h2c;
818 t->expire = tick_add(now_ms, h2c->timeout);
819 }
Willy Tarreauea392822017-10-31 10:02:25 +0100820
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200821 h2c->wait_event.tasklet = tasklet_new();
822 if (!h2c->wait_event.tasklet)
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200823 goto fail;
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200824 h2c->wait_event.tasklet->process = h2_io_cb;
825 h2c->wait_event.tasklet->context = h2c;
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100826 h2c->wait_event.events = 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200827
Willy Tarreau32218eb2017-09-22 08:07:25 +0200828 h2c->ddht = hpack_dht_alloc(h2_settings_header_table_size);
829 if (!h2c->ddht)
830 goto fail;
831
832 /* Initialise the context. */
833 h2c->st0 = H2_CS_PREFACE;
834 h2c->conn = conn;
Willy Tarreau2e2083a2019-01-31 10:34:07 +0100835 h2c->streams_limit = h2_settings_max_concurrent_streams;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200836 h2c->max_id = -1;
837 h2c->errcode = H2_ERR_NO_ERROR;
Willy Tarreau97aaa672018-12-23 09:49:04 +0100838 h2c->rcvd_c = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200839 h2c->rcvd_s = 0;
Willy Tarreau49745612017-12-03 18:56:02 +0100840 h2c->nb_streams = 0;
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200841 h2c->nb_cs = 0;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100842 h2c->nb_reserved = 0;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100843 h2c->stream_cnt = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200844
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200845 h2c->dbuf = *input;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200846 h2c->dsi = -1;
847 h2c->msi = -1;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100848
Willy Tarreau32218eb2017-09-22 08:07:25 +0200849 h2c->last_sid = -1;
850
Willy Tarreau51330962019-05-26 09:38:07 +0200851 br_init(h2c->mbuf, sizeof(h2c->mbuf) / sizeof(h2c->mbuf[0]));
Willy Tarreau32218eb2017-09-22 08:07:25 +0200852 h2c->miw = 65535; /* mux initial window size */
853 h2c->mws = 65535; /* mux window size */
854 h2c->mfs = 16384; /* initial max frame size */
Willy Tarreau751f2d02018-10-05 09:35:00 +0200855 h2c->streams_by_id = EB_ROOT;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200856 LIST_INIT(&h2c->send_list);
857 LIST_INIT(&h2c->fctl_list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +0200858 LIST_INIT(&h2c->blocked_list);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100859 LIST_INIT(&h2c->buf_wait.list);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200860
Christopher Fauletf81ef032019-10-04 15:19:43 +0200861 conn->ctx = h2c;
862
Willy Tarreau3f133572017-10-31 19:21:06 +0100863 if (t)
864 task_queue(t);
Willy Tarreauea392822017-10-31 10:02:25 +0100865
Willy Tarreau01b44822018-10-03 14:26:37 +0200866 if (h2c->flags & H2_CF_IS_BACK) {
867 /* FIXME: this is temporary, for outgoing connections we need
868 * to immediately allocate a stream until the code is modified
869 * so that the caller calls ->attach(). For now the outgoing cs
Christopher Fauletf81ef032019-10-04 15:19:43 +0200870 * is stored as conn->ctx by the caller and saved in conn_ctx.
Willy Tarreau01b44822018-10-03 14:26:37 +0200871 */
872 struct h2s *h2s;
873
Christopher Fauletf81ef032019-10-04 15:19:43 +0200874 h2s = h2c_bck_stream_new(h2c, conn_ctx, sess);
Willy Tarreau01b44822018-10-03 14:26:37 +0200875 if (!h2s)
876 goto fail_stream;
877 }
878
Willy Tarreau0f383582018-10-03 14:22:21 +0200879 /* prepare to read something */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200880 h2c_restart_reading(h2c, 1);
Willy Tarreau7838a792019-08-12 18:42:03 +0200881 TRACE_LEAVE(H2_EV_H2C_NEW, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200882 return 0;
Willy Tarreau01b44822018-10-03 14:26:37 +0200883 fail_stream:
884 hpack_dht_free(h2c->ddht);
mildiscd2d7de2018-10-02 16:44:18 +0200885 fail:
Willy Tarreauf6562792019-05-07 19:05:35 +0200886 task_destroy(t);
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200887 if (h2c->wait_event.tasklet)
888 tasklet_free(h2c->wait_event.tasklet);
Willy Tarreaubafbe012017-11-24 17:34:44 +0100889 pool_free(pool_head_h2c, h2c);
mildiscd2d7de2018-10-02 16:44:18 +0200890 fail_no_h2c:
Christopher Fauletf81ef032019-10-04 15:19:43 +0200891 conn->ctx = conn_ctx; /* restore saved ctx */
892 TRACE_DEVEL("leaving in error", H2_EV_H2C_NEW|H2_EV_H2C_END|H2_EV_H2C_ERR);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200893 return -1;
894}
895
Willy Tarreau751f2d02018-10-05 09:35:00 +0200896/* returns the next allocatable outgoing stream ID for the H2 connection, or
897 * -1 if no more is allocatable.
898 */
899static inline int32_t h2c_get_next_sid(const struct h2c *h2c)
900{
901 int32_t id = (h2c->max_id + 1) | 1;
Willy Tarreaua80dca82019-01-24 17:08:28 +0100902
903 if ((id & 0x80000000U) || (h2c->last_sid >= 0 && id > h2c->last_sid))
Willy Tarreau751f2d02018-10-05 09:35:00 +0200904 id = -1;
905 return id;
906}
907
Willy Tarreau2373acc2017-10-12 17:35:14 +0200908/* returns the stream associated with id <id> or NULL if not found */
909static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id)
910{
911 struct eb32_node *node;
912
Willy Tarreau751f2d02018-10-05 09:35:00 +0200913 if (id == 0)
914 return (struct h2s *)h2_closed_stream;
915
Willy Tarreau2a856182017-05-16 15:20:39 +0200916 if (id > h2c->max_id)
917 return (struct h2s *)h2_idle_stream;
918
Willy Tarreau2373acc2017-10-12 17:35:14 +0200919 node = eb32_lookup(&h2c->streams_by_id, id);
920 if (!node)
Willy Tarreau2a856182017-05-16 15:20:39 +0200921 return (struct h2s *)h2_closed_stream;
Willy Tarreau2373acc2017-10-12 17:35:14 +0200922
923 return container_of(node, struct h2s, by_id);
924}
925
Christopher Faulet73c12072019-04-08 11:23:22 +0200926/* release function. This one should be called to free all resources allocated
927 * to the mux.
Willy Tarreau62f52692017-10-08 23:01:42 +0200928 */
Christopher Faulet73c12072019-04-08 11:23:22 +0200929static void h2_release(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +0200930{
Christopher Faulet61840e72019-04-15 09:33:32 +0200931 struct connection *conn = NULL;;
Christopher Faulet39a96ee2019-04-08 10:52:21 +0200932
Willy Tarreau7838a792019-08-12 18:42:03 +0200933 TRACE_ENTER(H2_EV_H2C_END);
934
Willy Tarreau32218eb2017-09-22 08:07:25 +0200935 if (h2c) {
Christopher Faulet61840e72019-04-15 09:33:32 +0200936 /* The connection must be aattached to this mux to be released */
937 if (h2c->conn && h2c->conn->ctx == h2c)
938 conn = h2c->conn;
939
Willy Tarreau7838a792019-08-12 18:42:03 +0200940 TRACE_DEVEL("freeing h2c", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200941 hpack_dht_free(h2c->ddht);
Willy Tarreau14398122017-09-22 14:26:04 +0200942
Willy Tarreau186e96e2019-05-28 17:21:18 +0200943 if (LIST_ADDED(&h2c->buf_wait.list)) {
944 HA_SPIN_LOCK(BUF_WQ_LOCK, &buffer_wq_lock);
945 LIST_DEL(&h2c->buf_wait.list);
946 HA_SPIN_UNLOCK(BUF_WQ_LOCK, &buffer_wq_lock);
947 }
Willy Tarreau14398122017-09-22 14:26:04 +0200948
Willy Tarreau44e973f2018-03-01 17:49:30 +0100949 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200950 h2_release_mbuf(h2c);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100951
Willy Tarreauea392822017-10-31 10:02:25 +0100952 if (h2c->task) {
Willy Tarreau0975f112018-03-29 15:22:59 +0200953 h2c->task->context = NULL;
954 task_wakeup(h2c->task, TASK_WOKEN_OTHER);
Willy Tarreauea392822017-10-31 10:02:25 +0100955 h2c->task = NULL;
956 }
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200957 if (h2c->wait_event.tasklet)
958 tasklet_free(h2c->wait_event.tasklet);
Christopher Faulet21d849f2019-09-18 11:07:20 +0200959 if (conn && h2c->wait_event.events != 0)
Olivier Houcharde179d0e2019-03-21 18:27:17 +0100960 conn->xprt->unsubscribe(conn, conn->xprt_ctx, h2c->wait_event.events,
Christopher Faulet21d849f2019-09-18 11:07:20 +0200961 &h2c->wait_event);
Willy Tarreauea392822017-10-31 10:02:25 +0100962
Willy Tarreaubafbe012017-11-24 17:34:44 +0100963 pool_free(pool_head_h2c, h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200964 }
965
Christopher Faulet39a96ee2019-04-08 10:52:21 +0200966 if (conn) {
967 conn->mux = NULL;
968 conn->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +0200969 TRACE_DEVEL("freeing conn", H2_EV_H2C_END, conn);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200970
Christopher Faulet39a96ee2019-04-08 10:52:21 +0200971 conn_stop_tracking(conn);
972 conn_full_close(conn);
973 if (conn->destroy_cb)
974 conn->destroy_cb(conn);
975 conn_free(conn);
976 }
Willy Tarreau7838a792019-08-12 18:42:03 +0200977
978 TRACE_LEAVE(H2_EV_H2C_END);
Willy Tarreau62f52692017-10-08 23:01:42 +0200979}
980
981
Willy Tarreau71681172017-10-23 14:39:06 +0200982/******************************************************/
983/* functions below are for the H2 protocol processing */
984/******************************************************/
985
986/* returns the stream if of stream <h2s> or 0 if <h2s> is NULL */
Willy Tarreau1f094672017-11-20 21:27:45 +0100987static inline __maybe_unused int h2s_id(const struct h2s *h2s)
Willy Tarreau71681172017-10-23 14:39:06 +0200988{
989 return h2s ? h2s->id : 0;
990}
991
Willy Tarreau1d4a0f82019-08-02 07:52:08 +0200992/* returns the sum of the stream's own window size and the mux's initial
993 * window, which together form the stream's effective window size.
994 */
995static inline int h2s_mws(const struct h2s *h2s)
996{
997 return h2s->sws + h2s->h2c->miw;
998}
999
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001000/* returns true of the mux is currently busy as seen from stream <h2s> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001001static inline __maybe_unused int h2c_mux_busy(const struct h2c *h2c, const struct h2s *h2s)
Willy Tarreau5b5e6872017-09-25 16:17:25 +02001002{
1003 if (h2c->msi < 0)
1004 return 0;
1005
1006 if (h2c->msi == h2s_id(h2s))
1007 return 0;
1008
1009 return 1;
1010}
1011
Willy Tarreau741d6df2017-10-17 08:00:59 +02001012/* marks an error on the connection */
Willy Tarreau1f094672017-11-20 21:27:45 +01001013static inline __maybe_unused void h2c_error(struct h2c *h2c, enum h2_err err)
Willy Tarreau741d6df2017-10-17 08:00:59 +02001014{
Willy Tarreau7838a792019-08-12 18:42:03 +02001015 TRACE_POINT(H2_EV_H2C_ERR, h2c->conn,,, (void *)(long)(err));
Willy Tarreau741d6df2017-10-17 08:00:59 +02001016 h2c->errcode = err;
1017 h2c->st0 = H2_CS_ERROR;
1018}
1019
Willy Tarreau175cebb2019-01-24 10:02:24 +01001020/* marks an error on the stream. It may also update an already closed stream
1021 * (e.g. to report an error after an RST was received).
1022 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001023static inline __maybe_unused void h2s_error(struct h2s *h2s, enum h2_err err)
Willy Tarreau2e43f082017-10-17 08:03:59 +02001024{
Willy Tarreau175cebb2019-01-24 10:02:24 +01001025 if (h2s->id && h2s->st != H2_SS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001026 TRACE_POINT(H2_EV_H2S_ERR, h2s->h2c->conn, h2s,, (void *)(long)(err));
Willy Tarreau2e43f082017-10-17 08:03:59 +02001027 h2s->errcode = err;
Willy Tarreau175cebb2019-01-24 10:02:24 +01001028 if (h2s->st < H2_SS_ERROR)
1029 h2s->st = H2_SS_ERROR;
Willy Tarreauec988c72018-12-19 18:00:29 +01001030 if (h2s->cs)
1031 cs_set_error(h2s->cs);
Willy Tarreau2e43f082017-10-17 08:03:59 +02001032 }
1033}
1034
Willy Tarreau7e094452018-12-19 18:08:52 +01001035/* attempt to notify the data layer of recv availability */
1036static void __maybe_unused h2s_notify_recv(struct h2s *h2s)
1037{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001038 if (h2s->subs && h2s->subs->events & SUB_RETRY_RECV) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001039 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01001040 tasklet_wakeup(h2s->subs->tasklet);
1041 h2s->subs->events &= ~SUB_RETRY_RECV;
1042 if (!h2s->subs->events)
1043 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001044 }
1045}
1046
1047/* attempt to notify the data layer of send availability */
1048static void __maybe_unused h2s_notify_send(struct h2s *h2s)
1049{
Willy Tarreauf96508a2020-01-10 11:12:48 +01001050 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001051 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01001052 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01001053 tasklet_wakeup(h2s->subs->tasklet);
1054 h2s->subs->events &= ~SUB_RETRY_SEND;
1055 if (!h2s->subs->events)
1056 h2s->subs = NULL;
Willy Tarreau7e094452018-12-19 18:08:52 +01001057 }
Willy Tarreau5723f292020-01-10 15:16:57 +01001058 else if (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) {
1059 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
1060 tasklet_wakeup(h2s->shut_tl);
1061 }
Willy Tarreau7e094452018-12-19 18:08:52 +01001062}
1063
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001064/* alerts the data layer, trying to wake it up by all means, following
1065 * this sequence :
1066 * - if the h2s' data layer is subscribed to recv, then it's woken up for recv
1067 * - if its subscribed to send, then it's woken up for send
1068 * - if it was subscribed to neither, its ->wake() callback is called
1069 * It is safe to call this function with a closed stream which doesn't have a
1070 * conn_stream anymore.
1071 */
1072static void __maybe_unused h2s_alert(struct h2s *h2s)
1073{
Willy Tarreau7838a792019-08-12 18:42:03 +02001074 TRACE_ENTER(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
1075
Willy Tarreauf96508a2020-01-10 11:12:48 +01001076 if (h2s->subs ||
Willy Tarreau5723f292020-01-10 15:16:57 +01001077 (h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW))) {
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001078 h2s_notify_recv(h2s);
1079 h2s_notify_send(h2s);
1080 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001081 else if (h2s->cs && h2s->cs->data_cb->wake != NULL) {
1082 TRACE_POINT(H2_EV_STRM_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001083 h2s->cs->data_cb->wake(h2s->cs);
Willy Tarreau7838a792019-08-12 18:42:03 +02001084 }
1085
1086 TRACE_LEAVE(H2_EV_H2S_WAKE, h2s->h2c->conn, h2s);
Willy Tarreau8b2757c2018-12-19 17:36:48 +01001087}
1088
Willy Tarreaue4820742017-07-27 13:37:23 +02001089/* writes the 24-bit frame size <len> at address <frame> */
Willy Tarreau1f094672017-11-20 21:27:45 +01001090static inline __maybe_unused void h2_set_frame_size(void *frame, uint32_t len)
Willy Tarreaue4820742017-07-27 13:37:23 +02001091{
1092 uint8_t *out = frame;
1093
1094 *out = len >> 16;
1095 write_n16(out + 1, len);
1096}
1097
Willy Tarreau54c15062017-10-10 17:10:03 +02001098/* reads <bytes> bytes from buffer <b> starting at relative offset <o> from the
1099 * current pointer, dealing with wrapping, and stores the result in <dst>. It's
1100 * the caller's responsibility to verify that there are at least <bytes> bytes
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001101 * available in the buffer's input prior to calling this function. The buffer
1102 * is assumed not to hold any output data.
Willy Tarreau54c15062017-10-10 17:10:03 +02001103 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001104static inline __maybe_unused void h2_get_buf_bytes(void *dst, size_t bytes,
Willy Tarreau54c15062017-10-10 17:10:03 +02001105 const struct buffer *b, int o)
1106{
Willy Tarreau591d4452018-06-15 17:21:00 +02001107 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 +02001108}
1109
Willy Tarreau1f094672017-11-20 21:27:45 +01001110static inline __maybe_unused uint16_t h2_get_n16(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001111{
Willy Tarreau591d4452018-06-15 17:21:00 +02001112 return readv_n16(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 uint32_t h2_get_n32(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001116{
Willy Tarreau591d4452018-06-15 17:21:00 +02001117 return readv_n32(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001118}
1119
Willy Tarreau1f094672017-11-20 21:27:45 +01001120static inline __maybe_unused uint64_t h2_get_n64(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +02001121{
Willy Tarreau591d4452018-06-15 17:21:00 +02001122 return readv_n64(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +02001123}
1124
1125
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001126/* Peeks an H2 frame header from offset <o> of buffer <b> into descriptor <h>.
1127 * The algorithm is not obvious. It turns out that H2 headers are neither
1128 * aligned nor do they use regular sizes. And to add to the trouble, the buffer
1129 * may wrap so each byte read must be checked. The header is formed like this :
Willy Tarreau715d5312017-07-11 15:20:24 +02001130 *
1131 * b0 b1 b2 b3 b4 b5..b8
1132 * +----------+---------+--------+----+----+----------------------+
1133 * |len[23:16]|len[15:8]|len[7:0]|type|flag|sid[31:0] (big endian)|
1134 * +----------+---------+--------+----+----+----------------------+
1135 *
1136 * Here we read a big-endian 64 bit word from h[1]. This way in a single read
1137 * we get the sid properly aligned and ordered, and 16 bits of len properly
1138 * ordered as well. The type and flags can be extracted using bit shifts from
1139 * the word, and only one extra read is needed to fetch len[16:23].
Willy Tarreau9c7f2d12018-06-15 11:51:32 +02001140 * Returns zero if some bytes are missing, otherwise non-zero on success. The
1141 * buffer is assumed not to contain any output data.
Willy Tarreau715d5312017-07-11 15:20:24 +02001142 */
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001143static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, int o, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001144{
1145 uint64_t w;
1146
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001147 if (b_data(b) < o + 9)
Willy Tarreau715d5312017-07-11 15:20:24 +02001148 return 0;
1149
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001150 w = h2_get_n64(b, o + 1);
1151 h->len = *(uint8_t*)b_peek(b, o) << 16;
Willy Tarreau715d5312017-07-11 15:20:24 +02001152 h->sid = w & 0x7FFFFFFF; /* RFC7540#4.1: R bit must be ignored */
1153 h->ff = w >> 32;
1154 h->ft = w >> 40;
1155 h->len += w >> 48;
1156 return 1;
1157}
1158
1159/* skip the next 9 bytes corresponding to the frame header possibly parsed by
1160 * h2_peek_frame_hdr() above.
1161 */
Willy Tarreau1f094672017-11-20 21:27:45 +01001162static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b)
Willy Tarreau715d5312017-07-11 15:20:24 +02001163{
Willy Tarreaue5f12ce2018-06-15 10:28:05 +02001164 b_del(b, 9);
Willy Tarreau715d5312017-07-11 15:20:24 +02001165}
1166
1167/* same as above, automatically advances the buffer on success */
Willy Tarreau1f094672017-11-20 21:27:45 +01001168static inline __maybe_unused int h2_get_frame_hdr(struct buffer *b, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +02001169{
1170 int ret;
1171
Willy Tarreaua4428bd2018-12-22 18:11:41 +01001172 ret = h2_peek_frame_hdr(b, 0, h);
Willy Tarreau715d5312017-07-11 15:20:24 +02001173 if (ret > 0)
1174 h2_skip_frame_hdr(b);
1175 return ret;
1176}
1177
Willy Tarreaucb985a42019-10-07 16:56:34 +02001178
1179/* try to fragment the headers frame present at the beginning of buffer <b>,
1180 * enforcing a limit of <mfs> bytes per frame. Returns 0 on failure, 1 on
1181 * success. Typical causes of failure include a buffer not large enough to
1182 * add extra frame headers. The existing frame size is read in the current
1183 * frame. Its EH flag will be cleared if CONTINUATION frames need to be added,
1184 * and its length will be adjusted. The stream ID for continuation frames will
1185 * be copied from the initial frame's.
1186 */
1187static int h2_fragment_headers(struct buffer *b, uint32_t mfs)
1188{
1189 size_t remain = b->data - 9;
1190 int extra_frames = (remain - 1) / mfs;
1191 size_t fsize;
1192 char *fptr;
1193 int frame;
1194
1195 if (b->data <= mfs + 9)
1196 return 1;
1197
1198 /* Too large a frame, we need to fragment it using CONTINUATION
1199 * frames. We start from the end and move tails as needed.
1200 */
1201 if (b->data + extra_frames * 9 > b->size)
1202 return 0;
1203
1204 for (frame = extra_frames; frame; frame--) {
1205 fsize = ((remain - 1) % mfs) + 1;
1206 remain -= fsize;
1207
1208 /* move data */
1209 fptr = b->area + 9 + remain + (frame - 1) * 9;
1210 memmove(fptr + 9, b->area + 9 + remain, fsize);
1211 b->data += 9;
1212
1213 /* write new frame header */
1214 h2_set_frame_size(fptr, fsize);
1215 fptr[3] = H2_FT_CONTINUATION;
1216 fptr[4] = (frame == extra_frames) ? H2_F_HEADERS_END_HEADERS : 0;
1217 write_n32(fptr + 5, read_n32(b->area + 5));
1218 }
1219
1220 b->area[4] &= ~H2_F_HEADERS_END_HEADERS;
1221 h2_set_frame_size(b->area, remain);
1222 return 1;
1223}
1224
1225
Willy Tarreau00dd0782018-03-01 16:31:34 +01001226/* marks stream <h2s> as CLOSED and decrement the number of active streams for
1227 * its connection if the stream was not yet closed. Please use this exclusively
1228 * before closing a stream to ensure stream count is well maintained.
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001229 */
Willy Tarreau00dd0782018-03-01 16:31:34 +01001230static inline void h2s_close(struct h2s *h2s)
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001231{
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001232 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreau7838a792019-08-12 18:42:03 +02001233 TRACE_ENTER(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001234 h2s->h2c->nb_streams--;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001235 if (!h2s->id)
1236 h2s->h2c->nb_reserved--;
Willy Tarreaua27db382019-03-25 18:13:16 +01001237 if (h2s->cs) {
Willy Tarreaua27db382019-03-25 18:13:16 +01001238 if (!(h2s->cs->flags & CS_FL_EOS) && !b_data(&h2s->rxbuf))
1239 h2s_notify_recv(h2s);
1240 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001241 TRACE_LEAVE(H2_EV_H2S_END, h2s->h2c->conn, h2s);
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001242 }
Willy Tarreau91bfdd72017-12-14 12:00:14 +01001243 h2s->st = H2_SS_CLOSED;
1244}
1245
Willy Tarreau71049cc2018-03-28 13:56:39 +02001246/* detaches an H2 stream from its H2C and releases it to the H2S pool. */
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001247/* h2s_destroy should only ever be called by the thread that owns the stream,
1248 * that means that a tasklet should be used if we want to destroy the h2s
1249 * from another thread
1250 */
Willy Tarreau71049cc2018-03-28 13:56:39 +02001251static void h2s_destroy(struct h2s *h2s)
Willy Tarreau0a10de62018-03-01 16:27:53 +01001252{
Willy Tarreau7838a792019-08-12 18:42:03 +02001253 struct connection *conn = h2s->h2c->conn;
1254
1255 TRACE_ENTER(H2_EV_H2S_END, conn, h2s);
1256
Willy Tarreau0a10de62018-03-01 16:27:53 +01001257 h2s_close(h2s);
1258 eb32_delete(&h2s->by_id);
Olivier Houchard638b7992018-08-16 15:41:52 +02001259 if (b_size(&h2s->rxbuf)) {
1260 b_free(&h2s->rxbuf);
1261 offer_buffers(NULL, tasks_run_queue);
1262 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001263
1264 if (h2s->subs)
1265 h2s->subs->events = 0;
1266
Joseph Herlantd77575d2018-11-25 10:54:45 -08001267 /* There's no need to explicitly call unsubscribe here, the only
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001268 * reference left would be in the h2c send_list/fctl_list, and if
1269 * we're in it, we're getting out anyway
1270 */
Olivier Houchardd360ac62019-03-22 17:37:16 +01001271 LIST_DEL_INIT(&h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01001272
Olivier Houchard5a3671d2019-10-11 16:33:49 +02001273 /* ditto, calling tasklet_free() here should be ok */
Willy Tarreau5723f292020-01-10 15:16:57 +01001274 tasklet_free(h2s->shut_tl);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001275 pool_free(pool_head_h2s, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001276
1277 TRACE_LEAVE(H2_EV_H2S_END, conn);
Willy Tarreau0a10de62018-03-01 16:27:53 +01001278}
1279
Willy Tarreaua8e49542018-10-03 18:53:55 +02001280/* allocates a new stream <id> for connection <h2c> and adds it into h2c's
1281 * stream tree. In case of error, nothing is added and NULL is returned. The
1282 * causes of errors can be any failed memory allocation. The caller is
1283 * responsible for checking if the connection may support an extra stream
1284 * prior to calling this function.
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001285 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02001286static struct h2s *h2s_new(struct h2c *h2c, int id)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001287{
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001288 struct h2s *h2s;
1289
Willy Tarreau7838a792019-08-12 18:42:03 +02001290 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1291
Willy Tarreaubafbe012017-11-24 17:34:44 +01001292 h2s = pool_alloc(pool_head_h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001293 if (!h2s)
1294 goto out;
1295
Willy Tarreau5723f292020-01-10 15:16:57 +01001296 h2s->shut_tl = tasklet_new();
1297 if (!h2s->shut_tl) {
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001298 pool_free(pool_head_h2s, h2s);
1299 goto out;
1300 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01001301 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01001302 h2s->shut_tl->process = h2_deferred_shut;
1303 h2s->shut_tl->context = h2s;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001304 LIST_INIT(&h2s->list);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001305 h2s->h2c = h2c;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001306 h2s->cs = NULL;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001307 h2s->sws = 0;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001308 h2s->flags = H2_SF_NONE;
1309 h2s->errcode = H2_ERR_NO_ERROR;
1310 h2s->st = H2_SS_IDLE;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02001311 h2s->status = 0;
Willy Tarreau1915ca22019-01-24 11:49:37 +01001312 h2s->body_len = 0;
Olivier Houchard638b7992018-08-16 15:41:52 +02001313 h2s->rxbuf = BUF_NULL;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001314
1315 if (h2c->flags & H2_CF_IS_BACK) {
1316 h1m_init_req(&h2s->h1m);
1317 h2s->h1m.err_pos = -1; // don't care about errors on the request path
1318 h2s->h1m.flags |= H1_MF_TOLOWER;
1319 } else {
1320 h1m_init_res(&h2s->h1m);
1321 h2s->h1m.err_pos = -1; // don't care about errors on the response path
1322 h2s->h1m.flags |= H1_MF_TOLOWER;
1323 }
1324
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001325 h2s->by_id.key = h2s->id = id;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001326 if (id > 0)
1327 h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01001328 else
1329 h2c->nb_reserved++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001330
1331 eb32_insert(&h2c->streams_by_id, &h2s->by_id);
Willy Tarreau49745612017-12-03 18:56:02 +01001332 h2c->nb_streams++;
Willy Tarreaue9634bd2019-01-23 10:25:10 +01001333 h2c->stream_cnt++;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001334
Willy Tarreau7838a792019-08-12 18:42:03 +02001335 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001336 return h2s;
Willy Tarreaua8e49542018-10-03 18:53:55 +02001337 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001338 TRACE_DEVEL("leaving in error", H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreaua8e49542018-10-03 18:53:55 +02001339 return NULL;
1340}
1341
1342/* creates a new stream <id> on the h2c connection and returns it, or NULL in
1343 * case of memory allocation error.
1344 */
1345static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id)
1346{
1347 struct session *sess = h2c->conn->owner;
1348 struct conn_stream *cs;
1349 struct h2s *h2s;
1350
Willy Tarreau7838a792019-08-12 18:42:03 +02001351 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1352
Willy Tarreaua8e49542018-10-03 18:53:55 +02001353 if (h2c->nb_streams >= h2_settings_max_concurrent_streams)
1354 goto out;
1355
1356 h2s = h2s_new(h2c, id);
1357 if (!h2s)
1358 goto out;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001359
1360 cs = cs_new(h2c->conn);
1361 if (!cs)
1362 goto out_close;
1363
Olivier Houchard746fb772018-12-15 19:42:00 +01001364 cs->flags |= CS_FL_NOT_FIRST;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001365 h2s->cs = cs;
1366 cs->ctx = h2s;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001367 h2c->nb_cs++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001368
1369 if (stream_create_from_cs(cs) < 0)
1370 goto out_free_cs;
1371
Willy Tarreau590a0512018-09-05 11:56:48 +02001372 /* We want the accept date presented to the next stream to be the one
1373 * we have now, the handshake time to be null (since the next stream
1374 * is not delayed by a handshake), and the idle time to count since
1375 * right now.
1376 */
1377 sess->accept_date = date;
1378 sess->tv_accept = now;
1379 sess->t_handshake = 0;
1380
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001381 /* OK done, the stream lives its own life now */
Willy Tarreaufa1d3572019-01-31 10:31:51 +01001382 if (h2_frt_has_too_many_cs(h2c))
Willy Tarreauf2101912018-07-19 10:11:38 +02001383 h2c->flags |= H2_CF_DEM_TOOMANY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001384 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001385 return h2s;
1386
1387 out_free_cs:
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001388 h2c->nb_cs--;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001389 cs_free(cs);
Olivier Houchard58d87f32019-05-29 16:44:17 +02001390 h2s->cs = NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001391 out_close:
Willy Tarreau71049cc2018-03-28 13:56:39 +02001392 h2s_destroy(h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001393 out:
Willy Tarreau45efc072018-10-03 18:27:52 +02001394 sess_log(sess);
Willy Tarreau7838a792019-08-12 18:42:03 +02001395 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn);
Willy Tarreau45efc072018-10-03 18:27:52 +02001396 return NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001397}
1398
Willy Tarreau751f2d02018-10-05 09:35:00 +02001399/* allocates a new stream associated to conn_stream <cs> on the h2c connection
1400 * and returns it, or NULL in case of memory allocation error or if the highest
1401 * possible stream ID was reached.
1402 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01001403static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001404{
1405 struct h2s *h2s = NULL;
1406
Willy Tarreau7838a792019-08-12 18:42:03 +02001407 TRACE_ENTER(H2_EV_H2S_NEW, h2c->conn);
1408
Willy Tarreau86949782019-01-31 10:42:05 +01001409 if (h2c->nb_streams >= h2c->streams_limit)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001410 goto out;
1411
Willy Tarreaua80dca82019-01-24 17:08:28 +01001412 if (h2_streams_left(h2c) < 1)
1413 goto out;
1414
Willy Tarreau751f2d02018-10-05 09:35:00 +02001415 /* Defer choosing the ID until we send the first message to create the stream */
1416 h2s = h2s_new(h2c, 0);
1417 if (!h2s)
1418 goto out;
1419
1420 h2s->cs = cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001421 h2s->sess = sess;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001422 cs->ctx = h2s;
1423 h2c->nb_cs++;
1424
Willy Tarreau751f2d02018-10-05 09:35:00 +02001425 out:
Willy Tarreau7838a792019-08-12 18:42:03 +02001426 if (likely(h2s))
1427 TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn, h2s);
1428 else
1429 TRACE_LEAVE(H2_EV_H2S_NEW|H2_EV_H2S_ERR|H2_EV_H2S_END, h2c->conn, h2s);
Willy Tarreau751f2d02018-10-05 09:35:00 +02001430 return h2s;
1431}
1432
Willy Tarreaube5b7152017-09-25 16:25:39 +02001433/* try to send a settings frame on the connection. Returns > 0 on success, 0 if
1434 * it couldn't do anything. It may return an error in h2c. See RFC7540#11.3 for
1435 * the various settings codes.
1436 */
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001437static int h2c_send_settings(struct h2c *h2c)
Willy Tarreaube5b7152017-09-25 16:25:39 +02001438{
1439 struct buffer *res;
1440 char buf_data[100]; // enough for 15 settings
Willy Tarreau83061a82018-07-13 11:56:34 +02001441 struct buffer buf;
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001442 int mfs;
Willy Tarreau7838a792019-08-12 18:42:03 +02001443 int ret = 0;
1444
1445 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001446
1447 if (h2c_mux_busy(h2c, NULL)) {
1448 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001449 goto out;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001450 }
1451
Willy Tarreaube5b7152017-09-25 16:25:39 +02001452 chunk_init(&buf, buf_data, sizeof(buf_data));
1453 chunk_memcpy(&buf,
1454 "\x00\x00\x00" /* length : 0 for now */
1455 "\x04\x00" /* type : 4 (settings), flags : 0 */
1456 "\x00\x00\x00\x00", /* stream ID : 0 */
1457 9);
1458
Willy Tarreau0bbad6b2019-02-26 16:01:52 +01001459 if (h2c->flags & H2_CF_IS_BACK) {
1460 /* send settings_enable_push=0 */
1461 chunk_memcat(&buf, "\x00\x02\x00\x00\x00\x00", 6);
1462 }
1463
Willy Tarreaube5b7152017-09-25 16:25:39 +02001464 if (h2_settings_header_table_size != 4096) {
1465 char str[6] = "\x00\x01"; /* header_table_size */
1466
1467 write_n32(str + 2, h2_settings_header_table_size);
1468 chunk_memcat(&buf, str, 6);
1469 }
1470
1471 if (h2_settings_initial_window_size != 65535) {
1472 char str[6] = "\x00\x04"; /* initial_window_size */
1473
1474 write_n32(str + 2, h2_settings_initial_window_size);
1475 chunk_memcat(&buf, str, 6);
1476 }
1477
1478 if (h2_settings_max_concurrent_streams != 0) {
1479 char str[6] = "\x00\x03"; /* max_concurrent_streams */
1480
1481 /* Note: 0 means "unlimited" for haproxy's config but not for
1482 * the protocol, so never send this value!
1483 */
1484 write_n32(str + 2, h2_settings_max_concurrent_streams);
1485 chunk_memcat(&buf, str, 6);
1486 }
1487
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001488 mfs = h2_settings_max_frame_size;
1489 if (mfs > global.tune.bufsize)
1490 mfs = global.tune.bufsize;
1491
1492 if (!mfs)
1493 mfs = global.tune.bufsize;
1494
1495 if (mfs != 16384) {
Willy Tarreaube5b7152017-09-25 16:25:39 +02001496 char str[6] = "\x00\x05"; /* max_frame_size */
1497
1498 /* note: similarly we could also emit MAX_HEADER_LIST_SIZE to
1499 * match bufsize - rewrite size, but at the moment it seems
1500 * that clients don't take care of it.
1501 */
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001502 write_n32(str + 2, mfs);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001503 chunk_memcat(&buf, str, 6);
1504 }
1505
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001506 h2_set_frame_size(buf.area, buf.data - 9);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001507
1508 res = br_tail(h2c->mbuf);
1509 retry:
1510 if (!h2_get_buf(h2c, res)) {
1511 h2c->flags |= H2_CF_MUX_MALLOC;
1512 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001513 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001514 }
1515
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001516 ret = b_istput(res, ist2(buf.area, buf.data));
Willy Tarreaube5b7152017-09-25 16:25:39 +02001517 if (unlikely(ret <= 0)) {
1518 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001519 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1520 goto retry;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001521 h2c->flags |= H2_CF_MUX_MFULL;
1522 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001523 }
1524 else {
1525 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001526 ret = 0;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001527 }
1528 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001529 out:
1530 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001531 return ret;
1532}
1533
Willy Tarreau52eed752017-09-22 15:05:09 +02001534/* Try to receive a connection preface, then upon success try to send our
1535 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1536 * missing data. It may return an error in h2c.
1537 */
1538static int h2c_frt_recv_preface(struct h2c *h2c)
1539{
1540 int ret1;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001541 int ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001542
Willy Tarreau7838a792019-08-12 18:42:03 +02001543 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
1544
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001545 ret1 = b_isteq(&h2c->dbuf, 0, b_data(&h2c->dbuf), ist(H2_CONN_PREFACE));
Willy Tarreau52eed752017-09-22 15:05:09 +02001546
1547 if (unlikely(ret1 <= 0)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02001548 if (ret1 < 0)
1549 sess_log(h2c->conn->owner);
1550
Willy Tarreau52eed752017-09-22 15:05:09 +02001551 if (ret1 < 0 || conn_xprt_read0_pending(h2c->conn))
1552 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001553 ret2 = 0;
1554 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02001555 }
1556
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001557 ret2 = h2c_send_settings(h2c);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001558 if (ret2 > 0)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001559 b_del(&h2c->dbuf, ret1);
Willy Tarreau7838a792019-08-12 18:42:03 +02001560 out:
1561 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001562 return ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001563}
1564
Willy Tarreau01b44822018-10-03 14:26:37 +02001565/* Try to send a connection preface, then upon success try to send our
1566 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1567 * missing data. It may return an error in h2c.
1568 */
1569static int h2c_bck_send_preface(struct h2c *h2c)
1570{
1571 struct buffer *res;
Willy Tarreau7838a792019-08-12 18:42:03 +02001572 int ret = 0;
1573
1574 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02001575
1576 if (h2c_mux_busy(h2c, NULL)) {
1577 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001578 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001579 }
1580
Willy Tarreaubcc45952019-05-26 10:05:50 +02001581 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001582 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001583 if (!h2_get_buf(h2c, res)) {
Willy Tarreau01b44822018-10-03 14:26:37 +02001584 h2c->flags |= H2_CF_MUX_MALLOC;
1585 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001586 goto out;
Willy Tarreau01b44822018-10-03 14:26:37 +02001587 }
1588
1589 if (!b_data(res)) {
1590 /* preface not yet sent */
Willy Tarreau9c218e72019-05-26 10:08:28 +02001591 ret = b_istput(res, ist(H2_CONN_PREFACE));
1592 if (unlikely(ret <= 0)) {
1593 if (!ret) {
1594 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1595 goto retry;
1596 h2c->flags |= H2_CF_MUX_MFULL;
1597 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001598 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001599 }
1600 else {
1601 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001602 ret = 0;
1603 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001604 }
1605 }
Willy Tarreau01b44822018-10-03 14:26:37 +02001606 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001607 ret = h2c_send_settings(h2c);
1608 out:
1609 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PREFACE, h2c->conn);
1610 return ret;
Willy Tarreau01b44822018-10-03 14:26:37 +02001611}
1612
Willy Tarreau081d4722017-05-16 21:51:05 +02001613/* try to send a GOAWAY frame on the connection to report an error or a graceful
1614 * shutdown, with h2c->errcode as the error code. Returns > 0 on success or zero
1615 * if nothing was done. It uses h2c->last_sid as the advertised ID, or copies it
1616 * from h2c->max_id if it's not set yet (<0). In case of lack of room to write
1617 * the message, it subscribes the requester (either <h2s> or <h2c>) to future
1618 * notifications. It sets H2_CF_GOAWAY_SENT on success, and H2_CF_GOAWAY_FAILED
1619 * on unrecoverable failure. It will not attempt to send one again in this last
1620 * case so that it is safe to use h2c_error() to report such errors.
1621 */
1622static int h2c_send_goaway_error(struct h2c *h2c, struct h2s *h2s)
1623{
1624 struct buffer *res;
1625 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02001626 int ret = 0;
Willy Tarreau081d4722017-05-16 21:51:05 +02001627
Willy Tarreau7838a792019-08-12 18:42:03 +02001628 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
1629
1630 if (h2c->flags & H2_CF_GOAWAY_FAILED) {
1631 ret = 1; // claim that it worked
1632 goto out;
1633 }
Willy Tarreau081d4722017-05-16 21:51:05 +02001634
1635 if (h2c_mux_busy(h2c, h2s)) {
1636 if (h2s)
1637 h2s->flags |= H2_SF_BLK_MBUSY;
1638 else
1639 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001640 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001641 }
1642
Willy Tarreau9c218e72019-05-26 10:08:28 +02001643 /* len: 8, type: 7, flags: none, sid: 0 */
1644 memcpy(str, "\x00\x00\x08\x07\x00\x00\x00\x00\x00", 9);
1645
1646 if (h2c->last_sid < 0)
1647 h2c->last_sid = h2c->max_id;
1648
1649 write_n32(str + 9, h2c->last_sid);
1650 write_n32(str + 13, h2c->errcode);
1651
Willy Tarreaubcc45952019-05-26 10:05:50 +02001652 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001653 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001654 if (!h2_get_buf(h2c, res)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02001655 h2c->flags |= H2_CF_MUX_MALLOC;
1656 if (h2s)
1657 h2s->flags |= H2_SF_BLK_MROOM;
1658 else
1659 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001660 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001661 }
1662
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001663 ret = b_istput(res, ist2(str, 17));
Willy Tarreau081d4722017-05-16 21:51:05 +02001664 if (unlikely(ret <= 0)) {
1665 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001666 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1667 goto retry;
Willy Tarreau081d4722017-05-16 21:51:05 +02001668 h2c->flags |= H2_CF_MUX_MFULL;
1669 if (h2s)
1670 h2s->flags |= H2_SF_BLK_MROOM;
1671 else
1672 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001673 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001674 }
1675 else {
1676 /* we cannot report this error using GOAWAY, so we mark
1677 * it and claim a success.
1678 */
1679 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1680 h2c->flags |= H2_CF_GOAWAY_FAILED;
Willy Tarreau7838a792019-08-12 18:42:03 +02001681 ret = 1;
1682 goto out;
Willy Tarreau081d4722017-05-16 21:51:05 +02001683 }
1684 }
1685 h2c->flags |= H2_CF_GOAWAY_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02001686 out:
1687 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_GOAWAY, h2c->conn);
Willy Tarreau081d4722017-05-16 21:51:05 +02001688 return ret;
1689}
1690
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001691/* Try to send an RST_STREAM frame on the connection for the indicated stream
1692 * during mux operations. This stream must be valid and cannot be closed
1693 * already. h2s->id will be used for the stream ID and h2s->errcode will be
1694 * used for the error code. h2s->st will be update to H2_SS_CLOSED if it was
1695 * not yet.
1696 *
1697 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1698 * to write the message, it subscribes the stream to future notifications.
1699 */
1700static int h2s_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1701{
1702 struct buffer *res;
1703 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001704 int ret = 0;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001705
Willy Tarreau7838a792019-08-12 18:42:03 +02001706 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
1707
1708 if (!h2s || h2s->st == H2_SS_CLOSED) {
1709 ret = 1;
1710 goto out;
1711 }
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001712
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001713 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1714 * RST_STREAM in response to a RST_STREAM frame.
1715 */
Willy Tarreau231f6162019-08-06 10:01:40 +02001716 if (h2c->dsi == h2s->id && h2c->dft == H2_FT_RST_STREAM) {
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001717 ret = 1;
1718 goto ignore;
1719 }
1720
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001721 if (h2c_mux_busy(h2c, h2s)) {
1722 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001723 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001724 }
1725
Willy Tarreau9c218e72019-05-26 10:08:28 +02001726 /* len: 4, type: 3, flags: none */
1727 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1728 write_n32(str + 5, h2s->id);
1729 write_n32(str + 9, h2s->errcode);
1730
Willy Tarreaubcc45952019-05-26 10:05:50 +02001731 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001732 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001733 if (!h2_get_buf(h2c, res)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001734 h2c->flags |= H2_CF_MUX_MALLOC;
1735 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001736 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001737 }
1738
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001739 ret = b_istput(res, ist2(str, 13));
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001740 if (unlikely(ret <= 0)) {
1741 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001742 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1743 goto retry;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001744 h2c->flags |= H2_CF_MUX_MFULL;
1745 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001746 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001747 }
1748 else {
1749 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001750 ret = 0;
1751 goto out;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001752 }
1753 }
1754
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001755 ignore:
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001756 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001757 h2s_close(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001758 out:
1759 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001760 return ret;
1761}
1762
1763/* Try to send an RST_STREAM frame on the connection for the stream being
1764 * demuxed using h2c->dsi for the stream ID. It will use h2s->errcode as the
Willy Tarreaue6888ff2018-12-23 18:26:26 +01001765 * error code, even if the stream is one of the dummy ones, and will update
1766 * h2s->st to H2_SS_CLOSED if it was not yet.
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001767 *
1768 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1769 * to write the message, it blocks the demuxer and subscribes it to future
Joseph Herlantd77575d2018-11-25 10:54:45 -08001770 * notifications. It's worth mentioning that an RST may even be sent for a
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001771 * closed stream.
Willy Tarreau27a84c92017-10-17 08:10:17 +02001772 */
1773static int h2c_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1774{
1775 struct buffer *res;
1776 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02001777 int ret = 0;
1778
1779 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02001780
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001781 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1782 * RST_STREAM in response to a RST_STREAM frame.
1783 */
1784 if (h2c->dft == H2_FT_RST_STREAM) {
1785 ret = 1;
1786 goto ignore;
1787 }
1788
Willy Tarreau27a84c92017-10-17 08:10:17 +02001789 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001790 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001791 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001792 }
1793
Willy Tarreau9c218e72019-05-26 10:08:28 +02001794 /* len: 4, type: 3, flags: none */
1795 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1796
1797 write_n32(str + 5, h2c->dsi);
1798 write_n32(str + 9, h2s->errcode);
1799
Willy Tarreaubcc45952019-05-26 10:05:50 +02001800 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001801 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001802 if (!h2_get_buf(h2c, res)) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02001803 h2c->flags |= H2_CF_MUX_MALLOC;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001804 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001805 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001806 }
1807
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001808 ret = b_istput(res, ist2(str, 13));
Willy Tarreau27a84c92017-10-17 08:10:17 +02001809 if (unlikely(ret <= 0)) {
1810 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001811 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1812 goto retry;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001813 h2c->flags |= H2_CF_MUX_MFULL;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001814 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001815 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001816 }
1817 else {
1818 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001819 ret = 0;
1820 goto out;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001821 }
1822 }
1823
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001824 ignore:
Willy Tarreauab0e1da2018-10-05 10:16:37 +02001825 if (h2s->id) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02001826 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001827 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001828 }
1829
Willy Tarreau7838a792019-08-12 18:42:03 +02001830 out:
1831 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_RST, h2c->conn, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02001832 return ret;
1833}
1834
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001835/* try to send an empty DATA frame with the ES flag set to notify about the
1836 * end of stream and match a shutdown(write). If an ES was already sent as
1837 * indicated by HLOC/ERROR/RESET/CLOSED states, nothing is done. Returns > 0
1838 * on success or zero if nothing was done. In case of lack of room to write the
1839 * message, it subscribes the requesting stream to future notifications.
1840 */
1841static int h2_send_empty_data_es(struct h2s *h2s)
1842{
1843 struct h2c *h2c = h2s->h2c;
1844 struct buffer *res;
1845 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02001846 int ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001847
Willy Tarreau7838a792019-08-12 18:42:03 +02001848 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
1849
1850 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED) {
1851 ret = 1;
1852 goto out;
1853 }
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001854
1855 if (h2c_mux_busy(h2c, h2s)) {
1856 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02001857 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001858 }
1859
Willy Tarreau9c218e72019-05-26 10:08:28 +02001860 /* len: 0x000000, type: 0(DATA), flags: ES=1 */
1861 memcpy(str, "\x00\x00\x00\x00\x01", 5);
1862 write_n32(str + 5, h2s->id);
1863
Willy Tarreaubcc45952019-05-26 10:05:50 +02001864 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001865 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001866 if (!h2_get_buf(h2c, res)) {
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001867 h2c->flags |= H2_CF_MUX_MALLOC;
1868 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02001869 goto out;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001870 }
1871
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001872 ret = b_istput(res, ist2(str, 9));
Willy Tarreau6d8b6822017-11-07 14:39:09 +01001873 if (likely(ret > 0)) {
1874 h2s->flags |= H2_SF_ES_SENT;
1875 }
1876 else if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001877 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1878 goto retry;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01001879 h2c->flags |= H2_CF_MUX_MFULL;
1880 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01001881 }
1882 else {
1883 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02001884 ret = 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001885 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001886 out:
1887 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA|H2_EV_TX_EOI, h2c->conn, h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001888 return ret;
1889}
1890
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001891/* wake a specific stream and assign its conn_stream som CS_FL_* flags among
Willy Tarreau99ad1b32019-05-14 11:46:28 +02001892 * CS_FL_ERR_PENDING and CS_FL_ERROR if needed. The stream's state
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001893 * is automatically updated accordingly. If the stream is orphaned, it is
1894 * destroyed.
Christopher Fauletf02ca002019-03-07 16:21:34 +01001895 */
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001896static void h2s_wake_one_stream(struct h2s *h2s)
Christopher Fauletf02ca002019-03-07 16:21:34 +01001897{
Willy Tarreau7838a792019-08-12 18:42:03 +02001898 struct h2c *h2c = h2s->h2c;
1899
1900 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn, h2s);
1901
Christopher Fauletf02ca002019-03-07 16:21:34 +01001902 if (!h2s->cs) {
1903 /* this stream was already orphaned */
1904 h2s_destroy(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001905 TRACE_DEVEL("leaving with no h2s", H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01001906 return;
1907 }
1908
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001909 if (conn_xprt_read0_pending(h2s->h2c->conn)) {
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001910 if (h2s->st == H2_SS_OPEN)
1911 h2s->st = H2_SS_HREM;
1912 else if (h2s->st == H2_SS_HLOC)
1913 h2s_close(h2s);
1914 }
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001915
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001916 if ((h2s->h2c->st0 >= H2_CS_ERROR || h2s->h2c->conn->flags & CO_FL_ERROR) ||
1917 (h2s->h2c->last_sid > 0 && (!h2s->id || h2s->id > h2s->h2c->last_sid))) {
1918 h2s->cs->flags |= CS_FL_ERR_PENDING;
1919 if (h2s->cs->flags & CS_FL_EOS)
1920 h2s->cs->flags |= CS_FL_ERROR;
Willy Tarreau23482912019-05-07 15:23:14 +02001921
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001922 if (h2s->st < H2_SS_ERROR)
1923 h2s->st = H2_SS_ERROR;
1924 }
Christopher Fauletf02ca002019-03-07 16:21:34 +01001925
1926 h2s_alert(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02001927 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Christopher Fauletf02ca002019-03-07 16:21:34 +01001928}
1929
1930/* wake the streams attached to the connection, whose id is greater than <last>
1931 * or unassigned.
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001932 */
Willy Tarreau23482912019-05-07 15:23:14 +02001933static void h2_wake_some_streams(struct h2c *h2c, int last)
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001934{
1935 struct eb32_node *node;
1936 struct h2s *h2s;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001937
Willy Tarreau7838a792019-08-12 18:42:03 +02001938 TRACE_ENTER(H2_EV_H2S_WAKE, h2c->conn);
1939
Christopher Fauletf02ca002019-03-07 16:21:34 +01001940 /* Wake all streams with ID > last */
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001941 node = eb32_lookup_ge(&h2c->streams_by_id, last + 1);
1942 while (node) {
1943 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001944 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001945 h2s_wake_one_stream(h2s);
Christopher Fauletf02ca002019-03-07 16:21:34 +01001946 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01001947
Christopher Fauletf02ca002019-03-07 16:21:34 +01001948 /* Wake all streams with unassigned ID (ID == 0) */
1949 node = eb32_lookup(&h2c->streams_by_id, 0);
1950 while (node) {
1951 h2s = container_of(node, struct h2s, by_id);
1952 if (h2s->id > 0)
1953 break;
1954 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001955 h2s_wake_one_stream(h2s);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001956 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001957
1958 TRACE_LEAVE(H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001959}
1960
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001961/* Wake up all blocked streams whose window size has become positive after the
1962 * mux's initial window was adjusted. This should be done after having processed
1963 * SETTINGS frames which have updated the mux's initial window size.
Willy Tarreau3421aba2017-07-27 15:41:03 +02001964 */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001965static void h2c_unblock_sfctl(struct h2c *h2c)
Willy Tarreau3421aba2017-07-27 15:41:03 +02001966{
1967 struct h2s *h2s;
1968 struct eb32_node *node;
1969
Willy Tarreau7838a792019-08-12 18:42:03 +02001970 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
1971
Willy Tarreau3421aba2017-07-27 15:41:03 +02001972 node = eb32_first(&h2c->streams_by_id);
1973 while (node) {
1974 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02001975 if (h2s->flags & H2_SF_BLK_SFCTL && h2s_mws(h2s) > 0) {
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01001976 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02001977 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01001978 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
1979 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01001980 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01001981 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02001982 node = eb32_next(node);
1983 }
Willy Tarreau7838a792019-08-12 18:42:03 +02001984
1985 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02001986}
1987
1988/* processes a SETTINGS frame whose payload is <payload> for <plen> bytes, and
1989 * ACKs it if needed. Returns > 0 on success or zero on missing data. It may
Willy Tarreaub860c732019-01-30 15:39:55 +01001990 * return an error in h2c. The caller must have already verified frame length
1991 * and stream ID validity. Described in RFC7540#6.5.
Willy Tarreau3421aba2017-07-27 15:41:03 +02001992 */
1993static int h2c_handle_settings(struct h2c *h2c)
1994{
1995 unsigned int offset;
1996 int error;
1997
Willy Tarreau7838a792019-08-12 18:42:03 +02001998 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
1999
Willy Tarreau3421aba2017-07-27 15:41:03 +02002000 if (h2c->dff & H2_F_SETTINGS_ACK) {
2001 if (h2c->dfl) {
2002 error = H2_ERR_FRAME_SIZE_ERROR;
2003 goto fail;
2004 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002005 goto done;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002006 }
2007
Willy Tarreau3421aba2017-07-27 15:41:03 +02002008 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002009 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau7838a792019-08-12 18:42:03 +02002010 goto out0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002011
2012 /* parse the frame */
2013 for (offset = 0; offset < h2c->dfl; offset += 6) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002014 uint16_t type = h2_get_n16(&h2c->dbuf, offset);
2015 int32_t arg = h2_get_n32(&h2c->dbuf, offset + 2);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002016
2017 switch (type) {
2018 case H2_SETTINGS_INITIAL_WINDOW_SIZE:
2019 /* we need to update all existing streams with the
2020 * difference from the previous iws.
2021 */
2022 if (arg < 0) { // RFC7540#6.5.2
2023 error = H2_ERR_FLOW_CONTROL_ERROR;
2024 goto fail;
2025 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02002026 h2c->miw = arg;
2027 break;
2028 case H2_SETTINGS_MAX_FRAME_SIZE:
2029 if (arg < 16384 || arg > 16777215) { // RFC7540#6.5.2
2030 error = H2_ERR_PROTOCOL_ERROR;
2031 goto fail;
2032 }
2033 h2c->mfs = arg;
2034 break;
Willy Tarreau1b38b462017-12-03 19:02:28 +01002035 case H2_SETTINGS_ENABLE_PUSH:
2036 if (arg < 0 || arg > 1) { // RFC7540#6.5.2
2037 error = H2_ERR_PROTOCOL_ERROR;
2038 goto fail;
2039 }
2040 break;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01002041 case H2_SETTINGS_MAX_CONCURRENT_STREAMS:
2042 if (h2c->flags & H2_CF_IS_BACK) {
2043 /* the limit is only for the backend; for the frontend it is our limit */
2044 if ((unsigned int)arg > h2_settings_max_concurrent_streams)
2045 arg = h2_settings_max_concurrent_streams;
2046 h2c->streams_limit = arg;
2047 }
2048 break;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002049 }
2050 }
2051
2052 /* need to ACK this frame now */
2053 h2c->st0 = H2_CS_FRAME_A;
Willy Tarreau7838a792019-08-12 18:42:03 +02002054 done:
2055 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002056 return 1;
2057 fail:
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002058 if (!(h2c->flags & H2_CF_IS_BACK))
2059 sess_log(h2c->conn->owner);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002060 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002061 out0:
2062 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 +02002063 return 0;
2064}
2065
2066/* try to send an ACK for a settings frame on the connection. Returns > 0 on
2067 * success or one of the h2_status values.
2068 */
2069static int h2c_ack_settings(struct h2c *h2c)
2070{
2071 struct buffer *res;
2072 char str[9];
Willy Tarreau7838a792019-08-12 18:42:03 +02002073 int ret = 0;
2074
2075 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002076
2077 if (h2c_mux_busy(h2c, NULL)) {
2078 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002079 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002080 }
2081
Willy Tarreau9c218e72019-05-26 10:08:28 +02002082 memcpy(str,
2083 "\x00\x00\x00" /* length : 0 (no data) */
2084 "\x04" "\x01" /* type : 4, flags : ACK */
2085 "\x00\x00\x00\x00" /* stream ID */, 9);
2086
Willy Tarreaubcc45952019-05-26 10:05:50 +02002087 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002088 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002089 if (!h2_get_buf(h2c, res)) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02002090 h2c->flags |= H2_CF_MUX_MALLOC;
2091 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002092 goto out;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002093 }
2094
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002095 ret = b_istput(res, ist2(str, 9));
Willy Tarreau3421aba2017-07-27 15:41:03 +02002096 if (unlikely(ret <= 0)) {
2097 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002098 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2099 goto retry;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002100 h2c->flags |= H2_CF_MUX_MFULL;
2101 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002102 }
2103 else {
2104 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002105 ret = 0;
Willy Tarreau3421aba2017-07-27 15:41:03 +02002106 }
2107 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002108 out:
2109 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_SETTINGS, h2c->conn);
Willy Tarreau3421aba2017-07-27 15:41:03 +02002110 return ret;
2111}
2112
Willy Tarreaucf68c782017-10-10 17:11:41 +02002113/* processes a PING frame and schedules an ACK if needed. The caller must pass
2114 * the pointer to the payload in <payload>. Returns > 0 on success or zero on
Willy Tarreaub860c732019-01-30 15:39:55 +01002115 * missing data. The caller must have already verified frame length
2116 * and stream ID validity.
Willy Tarreaucf68c782017-10-10 17:11:41 +02002117 */
2118static int h2c_handle_ping(struct h2c *h2c)
2119{
Willy Tarreaucf68c782017-10-10 17:11:41 +02002120 /* schedule a response */
Willy Tarreau68ed6412017-12-03 18:15:56 +01002121 if (!(h2c->dff & H2_F_PING_ACK))
Willy Tarreaucf68c782017-10-10 17:11:41 +02002122 h2c->st0 = H2_CS_FRAME_A;
2123 return 1;
2124}
2125
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002126/* Try to send a window update for stream id <sid> and value <increment>.
2127 * Returns > 0 on success or zero on missing room or failure. It may return an
2128 * error in h2c.
2129 */
2130static int h2c_send_window_update(struct h2c *h2c, int sid, uint32_t increment)
2131{
2132 struct buffer *res;
2133 char str[13];
Willy Tarreau7838a792019-08-12 18:42:03 +02002134 int ret = 0;
2135
2136 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002137
2138 if (h2c_mux_busy(h2c, NULL)) {
2139 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002140 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002141 }
2142
Willy Tarreau9c218e72019-05-26 10:08:28 +02002143 /* length: 4, type: 8, flags: none */
2144 memcpy(str, "\x00\x00\x04\x08\x00", 5);
2145 write_n32(str + 5, sid);
2146 write_n32(str + 9, increment);
2147
Willy Tarreaubcc45952019-05-26 10:05:50 +02002148 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02002149 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02002150 if (!h2_get_buf(h2c, res)) {
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002151 h2c->flags |= H2_CF_MUX_MALLOC;
2152 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002153 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002154 }
2155
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002156 ret = b_istput(res, ist2(str, 13));
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002157 if (unlikely(ret <= 0)) {
2158 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002159 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2160 goto retry;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002161 h2c->flags |= H2_CF_MUX_MFULL;
2162 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002163 }
2164 else {
2165 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002166 ret = 0;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002167 }
2168 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002169 out:
2170 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002171 return ret;
2172}
2173
2174/* try to send pending window update for the connection. It's safe to call it
2175 * with no pending updates. Returns > 0 on success or zero on missing room or
2176 * failure. It may return an error in h2c.
2177 */
2178static int h2c_send_conn_wu(struct h2c *h2c)
2179{
2180 int ret = 1;
2181
Willy Tarreau7838a792019-08-12 18:42:03 +02002182 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2183
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002184 if (h2c->rcvd_c <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002185 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002186
Willy Tarreau97aaa672018-12-23 09:49:04 +01002187 if (!(h2c->flags & H2_CF_WINDOW_OPENED)) {
2188 /* increase the advertised connection window to 2G on
2189 * first update.
2190 */
2191 h2c->flags |= H2_CF_WINDOW_OPENED;
2192 h2c->rcvd_c += H2_INITIAL_WINDOW_INCREMENT;
2193 }
2194
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002195 /* send WU for the connection */
2196 ret = h2c_send_window_update(h2c, 0, h2c->rcvd_c);
2197 if (ret > 0)
2198 h2c->rcvd_c = 0;
2199
Willy Tarreau7838a792019-08-12 18:42:03 +02002200 out:
2201 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002202 return ret;
2203}
2204
2205/* try to send pending window update for the current dmux stream. It's safe to
2206 * call it with no pending updates. Returns > 0 on success or zero on missing
2207 * room or failure. It may return an error in h2c.
2208 */
2209static int h2c_send_strm_wu(struct h2c *h2c)
2210{
2211 int ret = 1;
2212
Willy Tarreau7838a792019-08-12 18:42:03 +02002213 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
2214
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002215 if (h2c->rcvd_s <= 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002216 goto out;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002217
2218 /* send WU for the stream */
2219 ret = h2c_send_window_update(h2c, h2c->dsi, h2c->rcvd_s);
2220 if (ret > 0)
2221 h2c->rcvd_s = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002222 out:
2223 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002224 return ret;
2225}
2226
Willy Tarreaucf68c782017-10-10 17:11:41 +02002227/* try to send an ACK for a ping frame on the connection. Returns > 0 on
2228 * success, 0 on missing data or one of the h2_status values.
2229 */
2230static int h2c_ack_ping(struct h2c *h2c)
2231{
2232 struct buffer *res;
2233 char str[17];
Willy Tarreau7838a792019-08-12 18:42:03 +02002234 int ret = 0;
2235
2236 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002237
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002238 if (b_data(&h2c->dbuf) < 8)
Willy Tarreau7838a792019-08-12 18:42:03 +02002239 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002240
2241 if (h2c_mux_busy(h2c, NULL)) {
2242 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02002243 goto out;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002244 }
2245
Willy Tarreaucf68c782017-10-10 17:11:41 +02002246 memcpy(str,
2247 "\x00\x00\x08" /* length : 8 (same payload) */
2248 "\x06" "\x01" /* type : 6, flags : ACK */
2249 "\x00\x00\x00\x00" /* stream ID */, 9);
2250
2251 /* copy the original payload */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002252 h2_get_buf_bytes(str + 9, 8, &h2c->dbuf, 0);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002253
Willy Tarreau9c218e72019-05-26 10:08:28 +02002254 res = br_tail(h2c->mbuf);
2255 retry:
2256 if (!h2_get_buf(h2c, res)) {
2257 h2c->flags |= H2_CF_MUX_MALLOC;
2258 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02002259 goto out;
Willy Tarreau9c218e72019-05-26 10:08:28 +02002260 }
2261
Willy Tarreauea1b06d2018-07-12 09:02:47 +02002262 ret = b_istput(res, ist2(str, 17));
Willy Tarreaucf68c782017-10-10 17:11:41 +02002263 if (unlikely(ret <= 0)) {
2264 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02002265 if ((res = br_tail_add(h2c->mbuf)) != NULL)
2266 goto retry;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002267 h2c->flags |= H2_CF_MUX_MFULL;
2268 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002269 }
2270 else {
2271 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002272 ret = 0;
Willy Tarreaucf68c782017-10-10 17:11:41 +02002273 }
2274 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002275 out:
2276 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_PING, h2c->conn);
Willy Tarreaucf68c782017-10-10 17:11:41 +02002277 return ret;
2278}
2279
Willy Tarreau26f95952017-07-27 17:18:30 +02002280/* processes a WINDOW_UPDATE frame whose payload is <payload> for <plen> bytes.
2281 * Returns > 0 on success or zero on missing data. It may return an error in
Willy Tarreaub860c732019-01-30 15:39:55 +01002282 * h2c or h2s. The caller must have already verified frame length and stream ID
2283 * validity. Described in RFC7540#6.9.
Willy Tarreau26f95952017-07-27 17:18:30 +02002284 */
2285static int h2c_handle_window_update(struct h2c *h2c, struct h2s *h2s)
2286{
2287 int32_t inc;
2288 int error;
2289
Willy Tarreau7838a792019-08-12 18:42:03 +02002290 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
2291
Willy Tarreau26f95952017-07-27 17:18:30 +02002292 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002293 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau7838a792019-08-12 18:42:03 +02002294 goto out0;
Willy Tarreau26f95952017-07-27 17:18:30 +02002295
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002296 inc = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau26f95952017-07-27 17:18:30 +02002297
2298 if (h2c->dsi != 0) {
2299 /* stream window update */
Willy Tarreau26f95952017-07-27 17:18:30 +02002300
2301 /* it's not an error to receive WU on a closed stream */
2302 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau7838a792019-08-12 18:42:03 +02002303 goto done;
Willy Tarreau26f95952017-07-27 17:18:30 +02002304
2305 if (!inc) {
2306 error = H2_ERR_PROTOCOL_ERROR;
2307 goto strm_err;
2308 }
2309
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002310 if (h2s_mws(h2s) >= 0 && h2s_mws(h2s) + inc < 0) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002311 error = H2_ERR_FLOW_CONTROL_ERROR;
2312 goto strm_err;
2313 }
2314
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002315 h2s->sws += inc;
2316 if (h2s_mws(h2s) > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) {
Willy Tarreau26f95952017-07-27 17:18:30 +02002317 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreau9edf6db2019-10-02 10:49:59 +02002318 LIST_DEL_INIT(&h2s->list);
Willy Tarreauf96508a2020-01-10 11:12:48 +01002319 if ((h2s->subs && h2s->subs->events & SUB_RETRY_SEND) ||
2320 h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))
Olivier Houcharddddfe312018-10-10 18:51:00 +02002321 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreau26f95952017-07-27 17:18:30 +02002322 }
2323 }
2324 else {
2325 /* connection window update */
2326 if (!inc) {
2327 error = H2_ERR_PROTOCOL_ERROR;
2328 goto conn_err;
2329 }
2330
2331 if (h2c->mws >= 0 && h2c->mws + inc < 0) {
2332 error = H2_ERR_FLOW_CONTROL_ERROR;
2333 goto conn_err;
2334 }
2335
2336 h2c->mws += inc;
2337 }
2338
Willy Tarreau7838a792019-08-12 18:42:03 +02002339 done:
2340 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002341 return 1;
2342
2343 conn_err:
2344 h2c_error(h2c, error);
Willy Tarreau7838a792019-08-12 18:42:03 +02002345 out0:
2346 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 +02002347 return 0;
2348
2349 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002350 h2s_error(h2s, error);
2351 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002352 TRACE_DEVEL("leaving on stream error", H2_EV_RX_FRAME|H2_EV_RX_WU, h2c->conn);
Willy Tarreau26f95952017-07-27 17:18:30 +02002353 return 0;
2354}
2355
Willy Tarreaue96b0922017-10-30 00:28:29 +01002356/* processes a GOAWAY frame, and signals all streams whose ID is greater than
Willy Tarreaub860c732019-01-30 15:39:55 +01002357 * the last ID. Returns > 0 on success or zero on missing data. The caller must
2358 * have already verified frame length and stream ID validity. Described in
2359 * RFC7540#6.8.
Willy Tarreaue96b0922017-10-30 00:28:29 +01002360 */
2361static int h2c_handle_goaway(struct h2c *h2c)
2362{
Willy Tarreaue96b0922017-10-30 00:28:29 +01002363 int last;
2364
Willy Tarreau7838a792019-08-12 18:42:03 +02002365 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002366 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002367 if (b_data(&h2c->dbuf) < h2c->dfl) {
2368 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002369 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002370 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01002371
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002372 last = h2_get_n32(&h2c->dbuf, 0);
2373 h2c->errcode = h2_get_n32(&h2c->dbuf, 4);
Willy Tarreau11cc2d62017-12-03 10:27:47 +01002374 if (h2c->last_sid < 0)
2375 h2c->last_sid = last;
Willy Tarreau23482912019-05-07 15:23:14 +02002376 h2_wake_some_streams(h2c, last);
Willy Tarreau7838a792019-08-12 18:42:03 +02002377 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn);
Willy Tarreaue96b0922017-10-30 00:28:29 +01002378 return 1;
Willy Tarreaue96b0922017-10-30 00:28:29 +01002379}
2380
Willy Tarreau92153fc2017-12-03 19:46:19 +01002381/* processes a PRIORITY frame, and either skips it or rejects if it is
Willy Tarreaub860c732019-01-30 15:39:55 +01002382 * invalid. Returns > 0 on success or zero on missing data. It may return an
2383 * error in h2c. The caller must have already verified frame length and stream
2384 * ID validity. Described in RFC7540#6.3.
Willy Tarreau92153fc2017-12-03 19:46:19 +01002385 */
2386static int h2c_handle_priority(struct h2c *h2c)
2387{
Willy Tarreau7838a792019-08-12 18:42:03 +02002388 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
2389
Willy Tarreau92153fc2017-12-03 19:46:19 +01002390 /* process full frame only */
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002391 if (b_data(&h2c->dbuf) < h2c->dfl) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002392 TRACE_DEVEL("leaving on missing data", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002393 return 0;
Willy Tarreaue7bbbca2019-08-30 15:02:22 +02002394 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01002395
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002396 if (h2_get_n32(&h2c->dbuf, 0) == h2c->dsi) {
Willy Tarreau92153fc2017-12-03 19:46:19 +01002397 /* 7540#5.3 : can't depend on itself */
Willy Tarreaub860c732019-01-30 15:39:55 +01002398 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau7838a792019-08-12 18:42:03 +02002399 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreaub860c732019-01-30 15:39:55 +01002400 return 0;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002401 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002402 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn);
Willy Tarreau92153fc2017-12-03 19:46:19 +01002403 return 1;
Willy Tarreau92153fc2017-12-03 19:46:19 +01002404}
2405
Willy Tarreaucd234e92017-08-18 10:59:39 +02002406/* processes an RST_STREAM frame, and sets the 32-bit error code on the stream.
Willy Tarreaub860c732019-01-30 15:39:55 +01002407 * Returns > 0 on success or zero on missing data. The caller must have already
2408 * verified frame length and stream ID validity. Described in RFC7540#6.4.
Willy Tarreaucd234e92017-08-18 10:59:39 +02002409 */
2410static int h2c_handle_rst_stream(struct h2c *h2c, struct h2s *h2s)
2411{
Willy Tarreau7838a792019-08-12 18:42:03 +02002412 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
2413
Willy Tarreaucd234e92017-08-18 10:59:39 +02002414 /* process full frame only */
Willy Tarreau7838a792019-08-12 18:42:03 +02002415 if (b_data(&h2c->dbuf) < h2c->dfl) {
2416 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 +02002417 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02002418 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002419
2420 /* late RST, already handled */
Willy Tarreau7838a792019-08-12 18:42:03 +02002421 if (h2s->st == H2_SS_CLOSED) {
2422 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 +02002423 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002424 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02002425
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002426 h2s->errcode = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau00dd0782018-03-01 16:31:34 +01002427 h2s_close(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002428
2429 if (h2s->cs) {
Willy Tarreauec988c72018-12-19 18:00:29 +01002430 cs_set_error(h2s->cs);
Willy Tarreauf830f012018-12-19 17:44:55 +01002431 h2s_alert(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002432 }
2433
2434 h2s->flags |= H2_SF_RST_RCVD;
Willy Tarreau7838a792019-08-12 18:42:03 +02002435 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_RST|H2_EV_RX_EOI, h2c->conn, h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02002436 return 1;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002437}
2438
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002439/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2440 * It may return an error in h2c or h2s. The caller must consider that the
2441 * return value is the new h2s in case one was allocated (most common case).
2442 * Described in RFC7540#6.2. Most of the
Willy Tarreau13278b42017-10-13 19:23:14 +02002443 * errors here are reported as connection errors since it's impossible to
2444 * recover from such errors after the compression context has been altered.
2445 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002446static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau13278b42017-10-13 19:23:14 +02002447{
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002448 struct buffer rxbuf = BUF_NULL;
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002449 unsigned long long body_len = 0;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002450 uint32_t flags = 0;
Willy Tarreau13278b42017-10-13 19:23:14 +02002451 int error;
2452
Willy Tarreau7838a792019-08-12 18:42:03 +02002453 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2454
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002455 if (!b_size(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002456 goto out; // empty buffer
Willy Tarreau13278b42017-10-13 19:23:14 +02002457
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002458 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002459 goto out; // incomplete frame
Willy Tarreau13278b42017-10-13 19:23:14 +02002460
2461 /* now either the frame is complete or the buffer is complete */
2462 if (h2s->st != H2_SS_IDLE) {
Willy Tarreau88d138e2019-01-02 19:38:14 +01002463 /* The stream exists/existed, this must be a trailers frame */
2464 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreauaab1a602019-05-06 11:12:18 +02002465 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &body_len);
2466 /* unrecoverable error ? */
2467 if (h2c->st0 >= H2_CS_ERROR)
2468 goto out;
2469
2470 if (error == 0)
2471 goto out; // missing data
2472
2473 if (error < 0) {
2474 /* Failed to decode this frame (e.g. too large request)
2475 * but the HPACK decompressor is still synchronized.
2476 */
2477 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
2478 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau88d138e2019-01-02 19:38:14 +01002479 goto out;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002480 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01002481 goto done;
2482 }
Willy Tarreau1f035502019-01-30 11:44:07 +01002483 /* the connection was already killed by an RST, let's consume
2484 * the data and send another RST.
2485 */
2486 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
2487 h2s = (struct h2s*)h2_error_stream;
2488 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002489 }
2490 else if (h2c->dsi <= h2c->max_id || !(h2c->dsi & 1)) {
2491 /* RFC7540#5.1.1 stream id > prev ones, and must be odd here */
2492 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002493 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02002494 goto conn_err;
2495 }
Willy Tarreau415b1ee2019-01-02 13:59:43 +01002496 else if (h2c->flags & H2_CF_DEM_TOOMANY)
2497 goto out; // IDLE but too many cs still present
Willy Tarreau13278b42017-10-13 19:23:14 +02002498
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002499 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002500
Willy Tarreau25919232019-01-03 14:48:18 +01002501 /* unrecoverable error ? */
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002502 if (h2c->st0 >= H2_CS_ERROR)
2503 goto out;
2504
Willy Tarreau25919232019-01-03 14:48:18 +01002505 if (error <= 0) {
2506 if (error == 0)
2507 goto out; // missing data
2508
2509 /* Failed to decode this stream (e.g. too large request)
2510 * but the HPACK decompressor is still synchronized.
2511 */
2512 h2s = (struct h2s*)h2_error_stream;
2513 goto send_rst;
2514 }
2515
Willy Tarreau22de8d32018-09-05 19:55:58 +02002516 /* Note: we don't emit any other logs below because ff we return
Willy Tarreaua8e49542018-10-03 18:53:55 +02002517 * positively from h2c_frt_stream_new(), the stream will report the error,
2518 * and if we return in error, h2c_frt_stream_new() will emit the error.
Willy Tarreau22de8d32018-09-05 19:55:58 +02002519 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02002520 h2s = h2c_frt_stream_new(h2c, h2c->dsi);
Willy Tarreau13278b42017-10-13 19:23:14 +02002521 if (!h2s) {
Willy Tarreau96a10c22018-12-23 18:30:44 +01002522 h2s = (struct h2s*)h2_refused_stream;
2523 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002524 }
2525
2526 h2s->st = H2_SS_OPEN;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002527 h2s->rxbuf = rxbuf;
2528 h2s->flags |= flags;
Willy Tarreau1915ca22019-01-24 11:49:37 +01002529 h2s->body_len = body_len;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002530
Willy Tarreau88d138e2019-01-02 19:38:14 +01002531 done:
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002532 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau13278b42017-10-13 19:23:14 +02002533 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002534
2535 if (h2s->flags & H2_SF_ES_RCVD) {
Willy Tarreaufc10f592019-01-30 19:28:32 +01002536 if (h2s->st == H2_SS_OPEN)
2537 h2s->st = H2_SS_HREM;
2538 else
2539 h2s_close(h2s);
Willy Tarreau13278b42017-10-13 19:23:14 +02002540 }
2541
Willy Tarreau3a429f02019-01-03 11:41:50 +01002542 /* update the max stream ID if the request is being processed */
2543 if (h2s->id > h2c->max_id)
2544 h2c->max_id = h2s->id;
Willy Tarreau13278b42017-10-13 19:23:14 +02002545
Willy Tarreau8fecec22019-08-30 07:29:53 +02002546 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 +01002547 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002548
2549 conn_err:
2550 h2c_error(h2c, error);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002551 goto out;
Willy Tarreau13278b42017-10-13 19:23:14 +02002552
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002553 out:
2554 h2_release_buf(h2c, &rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002555 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 +01002556 return NULL;
Willy Tarreau96a10c22018-12-23 18:30:44 +01002557
2558 send_rst:
2559 /* make the demux send an RST for the current stream. We may only
2560 * do this if we're certain that the HEADERS frame was properly
2561 * decompressed so that the HPACK decoder is still kept up to date.
2562 */
2563 h2_release_buf(h2c, &rxbuf);
2564 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002565
2566 TRACE_USER("rejected H2 request", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn,, &rxbuf);
2567 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreau96a10c22018-12-23 18:30:44 +01002568 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002569}
2570
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002571/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2572 * It may return an error in h2c or h2s. Described in RFC7540#6.2. Most of the
2573 * errors here are reported as connection errors since it's impossible to
2574 * recover from such errors after the compression context has been altered.
2575 */
2576static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
2577{
Christopher Faulet6884aa32019-09-23 15:28:20 +02002578 struct buffer rxbuf = BUF_NULL;
2579 unsigned long long body_len = 0;
2580 uint32_t flags = 0;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002581 int error;
2582
Willy Tarreau7838a792019-08-12 18:42:03 +02002583 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2584
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002585 if (!b_size(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002586 goto fail; // empty buffer
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002587
2588 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002589 goto fail; // incomplete frame
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002590
Christopher Faulet6884aa32019-09-23 15:28:20 +02002591 if (h2s->st != H2_SS_CLOSED) {
2592 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &h2s->body_len);
2593 }
2594 else {
2595 /* the connection was already killed by an RST, let's consume
2596 * the data and send another RST.
2597 */
2598 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
Christopher Fauletea7a7782019-09-26 16:19:13 +02002599 h2s = (struct h2s*)h2_error_stream;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002600 h2c->st0 = H2_CS_FRAME_E;
2601 goto send_rst;
2602 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002603
Willy Tarreau25919232019-01-03 14:48:18 +01002604 /* unrecoverable error ? */
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002605 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002606 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002607
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002608 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2609 /* RFC7540#5.1 */
2610 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2611 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002612 goto fail;
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002613 }
2614
Willy Tarreau25919232019-01-03 14:48:18 +01002615 if (error <= 0) {
2616 if (error == 0)
Willy Tarreau7838a792019-08-12 18:42:03 +02002617 goto fail; // missing data
Willy Tarreau25919232019-01-03 14:48:18 +01002618
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002619 /* stream error : send RST_STREAM */
Willy Tarreau25919232019-01-03 14:48:18 +01002620 h2s_error(h2s, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002621 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002622 goto fail;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002623 }
2624
Christopher Fauletfa922f02019-05-07 10:55:17 +02002625 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002626 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002627
Willy Tarreau927b88b2019-03-04 08:03:25 +01002628 if (h2s->cs && h2s->cs->flags & CS_FL_ERROR && h2s->st < H2_SS_ERROR)
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002629 h2s->st = H2_SS_ERROR;
Christopher Fauletfa922f02019-05-07 10:55:17 +02002630 else if (h2s->flags & H2_SF_ES_RCVD) {
2631 if (h2s->st == H2_SS_OPEN)
2632 h2s->st = H2_SS_HREM;
2633 else if (h2s->st == H2_SS_HLOC)
2634 h2s_close(h2s);
2635 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002636
Willy Tarreau8fecec22019-08-30 07:29:53 +02002637 TRACE_USER("rcvd H2 response", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn,, &h2s->rxbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02002638 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002639 return h2s;
Willy Tarreau7838a792019-08-12 18:42:03 +02002640 fail:
2641 TRACE_DEVEL("leaving on missing data or error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2642 return NULL;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002643
2644 send_rst:
2645 /* make the demux send an RST for the current stream. We may only
2646 * do this if we're certain that the HEADERS frame was properly
2647 * decompressed so that the HPACK decoder is still kept up to date.
2648 */
2649 h2_release_buf(h2c, &rxbuf);
2650 h2c->st0 = H2_CS_FRAME_E;
2651
2652 TRACE_USER("rejected H2 response", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn,, &rxbuf);
2653 TRACE_DEVEL("leaving on error", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
2654 return h2s;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002655}
2656
Willy Tarreau454f9052017-10-26 19:40:35 +02002657/* processes a DATA frame. Returns > 0 on success or zero on missing data.
2658 * It may return an error in h2c or h2s. Described in RFC7540#6.1.
2659 */
2660static int h2c_frt_handle_data(struct h2c *h2c, struct h2s *h2s)
2661{
2662 int error;
2663
Willy Tarreau7838a792019-08-12 18:42:03 +02002664 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
2665
Willy Tarreau454f9052017-10-26 19:40:35 +02002666 /* note that empty DATA frames are perfectly valid and sometimes used
2667 * to signal an end of stream (with the ES flag).
2668 */
2669
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002670 if (!b_size(&h2c->dbuf) && h2c->dfl)
Willy Tarreau7838a792019-08-12 18:42:03 +02002671 goto fail; // empty buffer
Willy Tarreau454f9052017-10-26 19:40:35 +02002672
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002673 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau7838a792019-08-12 18:42:03 +02002674 goto fail; // incomplete frame
Willy Tarreau454f9052017-10-26 19:40:35 +02002675
2676 /* now either the frame is complete or the buffer is complete */
2677
Willy Tarreau454f9052017-10-26 19:40:35 +02002678 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2679 /* RFC7540#6.1 */
2680 error = H2_ERR_STREAM_CLOSED;
2681 goto strm_err;
2682 }
2683
Christopher Faulet4f09ec82019-06-19 09:25:58 +02002684 if ((h2s->flags & H2_SF_DATA_CLEN) && (h2c->dfl - h2c->dpl) > h2s->body_len) {
Willy Tarreau1915ca22019-01-24 11:49:37 +01002685 /* RFC7540#8.1.2 */
2686 error = H2_ERR_PROTOCOL_ERROR;
2687 goto strm_err;
2688 }
2689
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002690 if (!h2_frt_transfer_data(h2s))
Willy Tarreau7838a792019-08-12 18:42:03 +02002691 goto fail;
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002692
Willy Tarreau454f9052017-10-26 19:40:35 +02002693 /* call the upper layers to process the frame, then let the upper layer
2694 * notify the stream about any change.
2695 */
2696 if (!h2s->cs) {
Willy Tarreau082c4572019-08-06 10:11:02 +02002697 /* The upper layer has already closed, this may happen on
2698 * 4xx/redirects during POST, or when receiving a response
2699 * from an H2 server after the client has aborted.
2700 */
2701 error = H2_ERR_CANCEL;
Willy Tarreau454f9052017-10-26 19:40:35 +02002702 goto strm_err;
2703 }
2704
Willy Tarreau8f650c32017-11-21 19:36:21 +01002705 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002706 goto fail;
Willy Tarreau8f650c32017-11-21 19:36:21 +01002707
Willy Tarreau721c9742017-11-07 11:05:42 +01002708 if (h2s->st >= H2_SS_ERROR) {
Willy Tarreau454f9052017-10-26 19:40:35 +02002709 /* stream error : send RST_STREAM */
Willy Tarreaua20a5192017-12-27 11:02:06 +01002710 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02002711 }
2712
2713 /* check for completion : the callee will change this to FRAME_A or
2714 * FRAME_H once done.
2715 */
2716 if (h2c->st0 == H2_CS_FRAME_P)
Willy Tarreau7838a792019-08-12 18:42:03 +02002717 goto fail;
Willy Tarreau454f9052017-10-26 19:40:35 +02002718
Willy Tarreauc4134ba2017-12-11 18:45:08 +01002719 /* last frame */
2720 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02002721 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreaufc10f592019-01-30 19:28:32 +01002722 if (h2s->st == H2_SS_OPEN)
2723 h2s->st = H2_SS_HREM;
2724 else
2725 h2s_close(h2s);
2726
Willy Tarreau1915ca22019-01-24 11:49:37 +01002727 if (h2s->flags & H2_SF_DATA_CLEN && h2s->body_len) {
2728 /* RFC7540#8.1.2 */
2729 error = H2_ERR_PROTOCOL_ERROR;
2730 goto strm_err;
2731 }
Willy Tarreauc4134ba2017-12-11 18:45:08 +01002732 }
2733
Willy Tarreau7838a792019-08-12 18:42:03 +02002734 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02002735 return 1;
2736
Willy Tarreau454f9052017-10-26 19:40:35 +02002737 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002738 h2s_error(h2s, error);
2739 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02002740 fail:
2741 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 +02002742 return 0;
2743}
2744
Willy Tarreau63864812019-08-07 14:25:20 +02002745/* check that the current frame described in h2c->{dsi,dft,dfl,dff,...} is
2746 * valid for the current stream state. This is needed only after parsing the
2747 * frame header but in practice it can be performed at any time during
2748 * H2_CS_FRAME_P since no state transition happens there. Returns >0 on success
2749 * or 0 in case of error, in which case either h2s or h2c will carry an error.
2750 */
2751static int h2_frame_check_vs_state(struct h2c *h2c, struct h2s *h2s)
2752{
Willy Tarreau7838a792019-08-12 18:42:03 +02002753 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
2754
Willy Tarreau63864812019-08-07 14:25:20 +02002755 if (h2s->st == H2_SS_IDLE &&
2756 h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) {
2757 /* RFC7540#5.1: any frame other than HEADERS or PRIORITY in
2758 * this state MUST be treated as a connection error
2759 */
2760 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002761 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau63864812019-08-07 14:25:20 +02002762 /* only log if no other stream can report the error */
2763 sess_log(h2c->conn->owner);
2764 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002765 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 +02002766 return 0;
2767 }
2768
Willy Tarreau57a18162019-11-24 14:57:53 +01002769 if (h2s->st == H2_SS_IDLE && (h2c->flags & H2_CF_IS_BACK)) {
2770 /* only PUSH_PROMISE would be permitted here */
2771 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2772 TRACE_DEVEL("leaving in error (idle&back)", H2_EV_RX_FRAME|H2_EV_RX_FHDR|H2_EV_PROTO_ERR, h2c->conn, h2s);
2773 return 0;
2774 }
2775
Willy Tarreau63864812019-08-07 14:25:20 +02002776 if (h2s->st == H2_SS_HREM && h2c->dft != H2_FT_WINDOW_UPDATE &&
2777 h2c->dft != H2_FT_RST_STREAM && h2c->dft != H2_FT_PRIORITY) {
2778 /* RFC7540#5.1: any frame other than WU/PRIO/RST in
2779 * this state MUST be treated as a stream error.
2780 * 6.2, 6.6 and 6.10 further mandate that HEADERS/
2781 * PUSH_PROMISE/CONTINUATION cause connection errors.
2782 */
2783 if (h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK)
2784 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2785 else
2786 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02002787 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 +02002788 return 0;
2789 }
2790
2791 /* Below the management of frames received in closed state is a
2792 * bit hackish because the spec makes strong differences between
2793 * streams closed by receiving RST, sending RST, and seeing ES
2794 * in both directions. In addition to this, the creation of a
2795 * new stream reusing the identifier of a closed one will be
2796 * detected here. Given that we cannot keep track of all closed
2797 * streams forever, we consider that unknown closed streams were
2798 * closed on RST received, which allows us to respond with an
2799 * RST without breaking the connection (eg: to abort a transfer).
2800 * Some frames have to be silently ignored as well.
2801 */
2802 if (h2s->st == H2_SS_CLOSED && h2c->dsi) {
2803 if (!(h2c->flags & H2_CF_IS_BACK) && h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
2804 /* #5.1.1: The identifier of a newly
2805 * established stream MUST be numerically
2806 * greater than all streams that the initiating
2807 * endpoint has opened or reserved. This
2808 * governs streams that are opened using a
2809 * HEADERS frame and streams that are reserved
2810 * using PUSH_PROMISE. An endpoint that
2811 * receives an unexpected stream identifier
2812 * MUST respond with a connection error.
2813 */
2814 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02002815 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 +02002816 return 0;
2817 }
2818
Willy Tarreau4c08f122019-09-26 08:47:15 +02002819 if (h2s->flags & H2_SF_RST_RCVD &&
2820 !(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 +02002821 /* RFC7540#5.1:closed: an endpoint that
2822 * receives any frame other than PRIORITY after
2823 * receiving a RST_STREAM MUST treat that as a
2824 * stream error of type STREAM_CLOSED.
2825 *
2826 * Note that old streams fall into this category
2827 * and will lead to an RST being sent.
2828 *
2829 * However, we cannot generalize this to all frame types. Those
2830 * carrying compression state must still be processed before
2831 * being dropped or we'll desynchronize the decoder. This can
2832 * happen with request trailers received after sending an
2833 * RST_STREAM, or with header/trailers responses received after
2834 * sending RST_STREAM (aborted stream).
Willy Tarreau4c08f122019-09-26 08:47:15 +02002835 *
2836 * In addition, since our CLOSED streams always carry the
2837 * RST_RCVD bit, we don't want to accidently catch valid
2838 * frames for a closed stream, i.e. RST/PRIO/WU.
Willy Tarreau63864812019-08-07 14:25:20 +02002839 */
2840 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2841 h2c->st0 = H2_CS_FRAME_E;
Christopher Faulet6884aa32019-09-23 15:28:20 +02002842 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 +02002843 return 0;
2844 }
2845
2846 /* RFC7540#5.1:closed: if this state is reached as a
2847 * result of sending a RST_STREAM frame, the peer that
2848 * receives the RST_STREAM might have already sent
2849 * frames on the stream that cannot be withdrawn. An
2850 * endpoint MUST ignore frames that it receives on
2851 * closed streams after it has sent a RST_STREAM
2852 * frame. An endpoint MAY choose to limit the period
2853 * over which it ignores frames and treat frames that
2854 * arrive after this time as being in error.
2855 */
2856 if (h2s->id && !(h2s->flags & H2_SF_RST_SENT)) {
2857 /* RFC7540#5.1:closed: any frame other than
2858 * PRIO/WU/RST in this state MUST be treated as
2859 * a connection error
2860 */
2861 if (h2c->dft != H2_FT_RST_STREAM &&
2862 h2c->dft != H2_FT_PRIORITY &&
2863 h2c->dft != H2_FT_WINDOW_UPDATE) {
2864 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
Willy Tarreau7838a792019-08-12 18:42:03 +02002865 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 +02002866 return 0;
2867 }
2868 }
2869 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002870 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn, h2s);
Willy Tarreau63864812019-08-07 14:25:20 +02002871 return 1;
2872}
2873
Willy Tarreaubc933932017-10-09 16:21:43 +02002874/* process Rx frames to be demultiplexed */
2875static void h2_process_demux(struct h2c *h2c)
2876{
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002877 struct h2s *h2s = NULL, *tmp_h2s;
Willy Tarreau54f46e52019-01-30 15:11:03 +01002878 struct h2_fh hdr;
2879 unsigned int padlen = 0;
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02002880 int32_t old_iw = h2c->miw;
Willy Tarreauf3ee0692017-10-17 08:18:25 +02002881
Willy Tarreau7838a792019-08-12 18:42:03 +02002882 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
2883
Willy Tarreau081d4722017-05-16 21:51:05 +02002884 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau7838a792019-08-12 18:42:03 +02002885 goto out;
Willy Tarreau52eed752017-09-22 15:05:09 +02002886
2887 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
2888 if (h2c->st0 == H2_CS_PREFACE) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002889 TRACE_STATE("expecting preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau01b44822018-10-03 14:26:37 +02002890 if (h2c->flags & H2_CF_IS_BACK)
Willy Tarreau7838a792019-08-12 18:42:03 +02002891 goto out;
2892
Willy Tarreau52eed752017-09-22 15:05:09 +02002893 if (unlikely(h2c_frt_recv_preface(h2c) <= 0)) {
2894 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02002895 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002896 TRACE_PROTO("failed to receive preface", H2_EV_RX_PREFACE|H2_EV_PROTO_ERR, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02002897 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002898 sess_log(h2c->conn->owner);
2899 }
Willy Tarreau52eed752017-09-22 15:05:09 +02002900 goto fail;
2901 }
Willy Tarreau7838a792019-08-12 18:42:03 +02002902 TRACE_PROTO("received preface", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02002903
2904 h2c->max_id = 0;
2905 h2c->st0 = H2_CS_SETTINGS1;
Willy Tarreau7838a792019-08-12 18:42:03 +02002906 TRACE_STATE("switching to SETTINGS1", H2_EV_RX_PREFACE, h2c->conn);
Willy Tarreau52eed752017-09-22 15:05:09 +02002907 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002908
2909 if (h2c->st0 == H2_CS_SETTINGS1) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002910 /* ensure that what is pending is a valid SETTINGS frame
2911 * without an ACK.
2912 */
Willy Tarreau7838a792019-08-12 18:42:03 +02002913 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 +02002914 if (!h2_get_frame_hdr(&h2c->dbuf, &hdr)) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002915 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02002916 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002917 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 +02002918 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002919 if (!(h2c->flags & H2_CF_IS_BACK))
2920 sess_log(h2c->conn->owner);
Willy Tarreau22de8d32018-09-05 19:55:58 +02002921 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002922 goto fail;
2923 }
2924
2925 if (hdr.sid || hdr.ft != H2_FT_SETTINGS || hdr.ff & H2_F_SETTINGS_ACK) {
2926 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau7838a792019-08-12 18:42:03 +02002927 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 +02002928 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2929 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002930 if (!(h2c->flags & H2_CF_IS_BACK))
2931 sess_log(h2c->conn->owner);
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002932 goto fail;
2933 }
2934
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02002935 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002936 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau7838a792019-08-12 18:42:03 +02002937 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 +02002938 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
2939 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002940 if (!(h2c->flags & H2_CF_IS_BACK))
2941 sess_log(h2c->conn->owner);
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002942 goto fail;
2943 }
2944
Willy Tarreau3bf69182018-12-21 15:34:50 +01002945 /* that's OK, switch to FRAME_P to process it. This is
2946 * a SETTINGS frame whose header has already been
2947 * deleted above.
2948 */
Willy Tarreau54f46e52019-01-30 15:11:03 +01002949 padlen = 0;
2950 goto new_frame;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002951 }
Willy Tarreau52eed752017-09-22 15:05:09 +02002952 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002953
2954 /* process as many incoming frames as possible below */
Willy Tarreau7838a792019-08-12 18:42:03 +02002955 while (1) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02002956 int ret = 0;
2957
Willy Tarreau7838a792019-08-12 18:42:03 +02002958 if (!b_data(&h2c->dbuf)) {
2959 TRACE_DEVEL("no more Rx data", H2_EV_RX_FRAME, h2c->conn);
2960 break;
2961 }
2962
2963 if (h2c->st0 >= H2_CS_ERROR) {
2964 TRACE_STATE("end of connection reported", H2_EV_RX_FRAME|H2_EV_RX_EOI, h2c->conn);
Willy Tarreau7e98c052017-10-10 15:56:59 +02002965 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02002966 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002967
2968 if (h2c->st0 == H2_CS_FRAME_H) {
Willy Tarreau30d05f32019-08-06 15:49:51 +02002969 h2c->rcvd_s = 0;
2970
Willy Tarreau7838a792019-08-12 18:42:03 +02002971 TRACE_STATE("expecting H2 frame header", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
Willy Tarreaua4428bd2018-12-22 18:11:41 +01002972 if (!h2_peek_frame_hdr(&h2c->dbuf, 0, &hdr))
Willy Tarreau7e98c052017-10-10 15:56:59 +02002973 break;
2974
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02002975 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002976 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 +02002977 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002978 if (!h2c->nb_streams && !(h2c->flags & H2_CF_IS_BACK)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02002979 /* only log if no other stream can report the error */
2980 sess_log(h2c->conn->owner);
2981 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002982 break;
2983 }
2984
Christopher Fauletdd2a5622019-06-18 12:22:38 +02002985 padlen = 0;
Willy Tarreau3bf69182018-12-21 15:34:50 +01002986 if (h2_ft_bit(hdr.ft) & H2_FT_PADDED_MASK && hdr.ff & H2_F_PADDED) {
2987 /* If the frame is padded (HEADERS, PUSH_PROMISE or DATA),
2988 * we read the pad length and drop it from the remaining
2989 * payload (one byte + the 9 remaining ones = 10 total
2990 * removed), so we have a frame payload starting after the
2991 * pad len. Flow controlled frames (DATA) also count the
2992 * padlen in the flow control, so it must be adjusted.
2993 */
2994 if (hdr.len < 1) {
Willy Tarreau7838a792019-08-12 18:42:03 +02002995 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 +01002996 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02002997 if (!(h2c->flags & H2_CF_IS_BACK))
2998 sess_log(h2c->conn->owner);
Willy Tarreau3bf69182018-12-21 15:34:50 +01002999 goto fail;
3000 }
3001 hdr.len--;
3002
3003 if (b_data(&h2c->dbuf) < 10)
3004 break; // missing padlen
3005
3006 padlen = *(uint8_t *)b_peek(&h2c->dbuf, 9);
3007
3008 if (padlen > hdr.len) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003009 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 +01003010 /* RFC7540#6.1 : pad length = length of
3011 * frame payload or greater => error.
3012 */
3013 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003014 if (!(h2c->flags & H2_CF_IS_BACK))
3015 sess_log(h2c->conn->owner);
Willy Tarreau3bf69182018-12-21 15:34:50 +01003016 goto fail;
3017 }
3018
3019 if (h2_ft_bit(hdr.ft) & H2_FT_FC_MASK) {
3020 h2c->rcvd_c++;
3021 h2c->rcvd_s++;
3022 }
3023 b_del(&h2c->dbuf, 1);
3024 }
3025 h2_skip_frame_hdr(&h2c->dbuf);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003026
3027 new_frame:
Willy Tarreau7e98c052017-10-10 15:56:59 +02003028 h2c->dfl = hdr.len;
3029 h2c->dsi = hdr.sid;
3030 h2c->dft = hdr.ft;
3031 h2c->dff = hdr.ff;
Willy Tarreau3bf69182018-12-21 15:34:50 +01003032 h2c->dpl = padlen;
Willy Tarreau73db4342019-09-25 07:28:44 +02003033 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 +02003034 h2c->st0 = H2_CS_FRAME_P;
Willy Tarreau54f46e52019-01-30 15:11:03 +01003035
3036 /* check for minimum basic frame format validity */
3037 ret = h2_frame_check(h2c->dft, 1, h2c->dsi, h2c->dfl, global.tune.bufsize);
3038 if (ret != H2_ERR_NO_ERROR) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003039 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 +01003040 h2c_error(h2c, ret);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003041 if (!(h2c->flags & H2_CF_IS_BACK))
3042 sess_log(h2c->conn->owner);
Willy Tarreau54f46e52019-01-30 15:11:03 +01003043 goto fail;
3044 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003045 }
3046
Willy Tarreau9fd5aa82019-08-06 15:21:45 +02003047 /* Only H2_CS_FRAME_P, H2_CS_FRAME_A and H2_CS_FRAME_E here.
3048 * H2_CS_FRAME_P indicates an incomplete previous operation
3049 * (most often the first attempt) and requires some validity
3050 * checks for the frame and the current state. The two other
3051 * ones are set after completion (or abortion) and must skip
3052 * validity checks.
3053 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003054 tmp_h2s = h2c_st_by_id(h2c, h2c->dsi);
3055
Willy Tarreau567beb82018-12-18 16:52:44 +01003056 if (tmp_h2s != h2s && h2s && h2s->cs &&
3057 (b_data(&h2s->rxbuf) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003058 conn_xprt_read0_pending(h2c->conn) ||
3059 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003060 (h2s->flags & H2_SF_ES_RCVD) ||
3061 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003062 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003063 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 +01003064 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003065 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003066 }
3067 h2s = tmp_h2s;
Willy Tarreau7e98c052017-10-10 15:56:59 +02003068
Willy Tarreau63864812019-08-07 14:25:20 +02003069 if (h2c->st0 == H2_CS_FRAME_E ||
Willy Tarreau7838a792019-08-12 18:42:03 +02003070 (h2c->st0 == H2_CS_FRAME_P && !h2_frame_check_vs_state(h2c, h2s))) {
3071 TRACE_PROTO("stream error reported", H2_EV_RX_FRAME|H2_EV_PROTO_ERR, h2c->conn, h2s);
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003072 goto strm_err;
Willy Tarreau7838a792019-08-12 18:42:03 +02003073 }
Willy Tarreauc0da1962017-10-30 18:38:00 +01003074
Willy Tarreau7e98c052017-10-10 15:56:59 +02003075 switch (h2c->dft) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02003076 case H2_FT_SETTINGS:
Willy Tarreau7838a792019-08-12 18:42:03 +02003077 if (h2c->st0 == H2_CS_FRAME_P) {
3078 TRACE_PROTO("receiving H2 SETTINGS frame", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS, h2c->conn, h2s);
Willy Tarreau3421aba2017-07-27 15:41:03 +02003079 ret = h2c_handle_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003080 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003081
Willy Tarreau7838a792019-08-12 18:42:03 +02003082 if (h2c->st0 == H2_CS_FRAME_A) {
3083 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 +02003084 ret = h2c_ack_settings(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003085 }
Willy Tarreau3421aba2017-07-27 15:41:03 +02003086 break;
3087
Willy Tarreaucf68c782017-10-10 17:11:41 +02003088 case H2_FT_PING:
Willy Tarreau7838a792019-08-12 18:42:03 +02003089 if (h2c->st0 == H2_CS_FRAME_P) {
3090 TRACE_PROTO("receiving H2 PING frame", H2_EV_RX_FRAME|H2_EV_RX_PING, h2c->conn, h2s);
Willy Tarreaucf68c782017-10-10 17:11:41 +02003091 ret = h2c_handle_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003092 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003093
Willy Tarreau7838a792019-08-12 18:42:03 +02003094 if (h2c->st0 == H2_CS_FRAME_A) {
3095 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 +02003096 ret = h2c_ack_ping(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003097 }
Willy Tarreaucf68c782017-10-10 17:11:41 +02003098 break;
3099
Willy Tarreau26f95952017-07-27 17:18:30 +02003100 case H2_FT_WINDOW_UPDATE:
Willy Tarreau7838a792019-08-12 18:42:03 +02003101 if (h2c->st0 == H2_CS_FRAME_P) {
3102 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 +02003103 ret = h2c_handle_window_update(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003104 }
Willy Tarreau26f95952017-07-27 17:18:30 +02003105 break;
3106
Willy Tarreau61290ec2017-10-17 08:19:21 +02003107 case H2_FT_CONTINUATION:
Willy Tarreauea18f862018-12-22 20:19:26 +01003108 /* RFC7540#6.10: CONTINUATION may only be preceeded by
3109 * a HEADERS/PUSH_PROMISE/CONTINUATION frame. These
3110 * frames' parsers consume all following CONTINUATION
3111 * frames so this one is out of sequence.
Willy Tarreau61290ec2017-10-17 08:19:21 +02003112 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003113 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 +01003114 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003115 if (!(h2c->flags & H2_CF_IS_BACK))
3116 sess_log(h2c->conn->owner);
Willy Tarreauea18f862018-12-22 20:19:26 +01003117 goto fail;
Willy Tarreau61290ec2017-10-17 08:19:21 +02003118
Willy Tarreau13278b42017-10-13 19:23:14 +02003119 case H2_FT_HEADERS:
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003120 if (h2c->st0 == H2_CS_FRAME_P) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003121 TRACE_PROTO("receiving H2 HEADERS frame", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02003122 if (h2c->flags & H2_CF_IS_BACK)
3123 tmp_h2s = h2c_bck_handle_headers(h2c, h2s);
3124 else
3125 tmp_h2s = h2c_frt_handle_headers(h2c, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003126 if (tmp_h2s) {
3127 h2s = tmp_h2s;
3128 ret = 1;
3129 }
3130 }
Willy Tarreau13278b42017-10-13 19:23:14 +02003131 break;
3132
Willy Tarreau454f9052017-10-26 19:40:35 +02003133 case H2_FT_DATA:
Willy Tarreau7838a792019-08-12 18:42:03 +02003134 if (h2c->st0 == H2_CS_FRAME_P) {
3135 TRACE_PROTO("receiving H2 DATA frame", H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454f9052017-10-26 19:40:35 +02003136 ret = h2c_frt_handle_data(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003137 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003138
Willy Tarreau7838a792019-08-12 18:42:03 +02003139 if (h2c->st0 == H2_CS_FRAME_A) {
3140 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 +02003141 ret = h2c_send_strm_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003142 }
Willy Tarreau454f9052017-10-26 19:40:35 +02003143 break;
Willy Tarreaucd234e92017-08-18 10:59:39 +02003144
Willy Tarreau92153fc2017-12-03 19:46:19 +01003145 case H2_FT_PRIORITY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003146 if (h2c->st0 == H2_CS_FRAME_P) {
3147 TRACE_PROTO("receiving H2 PRIORITY frame", H2_EV_RX_FRAME|H2_EV_RX_PRIO, h2c->conn, h2s);
Willy Tarreau92153fc2017-12-03 19:46:19 +01003148 ret = h2c_handle_priority(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003149 }
Willy Tarreau92153fc2017-12-03 19:46:19 +01003150 break;
3151
Willy Tarreaucd234e92017-08-18 10:59:39 +02003152 case H2_FT_RST_STREAM:
Willy Tarreau7838a792019-08-12 18:42:03 +02003153 if (h2c->st0 == H2_CS_FRAME_P) {
3154 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 +02003155 ret = h2c_handle_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003156 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02003157 break;
3158
Willy Tarreaue96b0922017-10-30 00:28:29 +01003159 case H2_FT_GOAWAY:
Willy Tarreau7838a792019-08-12 18:42:03 +02003160 if (h2c->st0 == H2_CS_FRAME_P) {
3161 TRACE_PROTO("receiving H2 GOAWAY frame", H2_EV_RX_FRAME|H2_EV_RX_GOAWAY, h2c->conn, h2s);
Willy Tarreaue96b0922017-10-30 00:28:29 +01003162 ret = h2c_handle_goaway(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003163 }
Willy Tarreaue96b0922017-10-30 00:28:29 +01003164 break;
3165
Willy Tarreau1c661982017-10-30 13:52:01 +01003166 /* implement all extra frame types here */
Willy Tarreau7e98c052017-10-10 15:56:59 +02003167 default:
Willy Tarreau7838a792019-08-12 18:42:03 +02003168 TRACE_PROTO("receiving H2 ignored frame", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003169 /* drop frames that we ignore. They may be larger than
3170 * the buffer so we drain all of their contents until
3171 * we reach the end.
3172 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003173 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3174 b_del(&h2c->dbuf, ret);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003175 h2c->dfl -= ret;
3176 ret = h2c->dfl == 0;
3177 }
3178
Willy Tarreauf182a9a2017-10-30 12:03:50 +01003179 strm_err:
Willy Tarreaua20a5192017-12-27 11:02:06 +01003180 /* We may have to send an RST if not done yet */
Willy Tarreau7838a792019-08-12 18:42:03 +02003181 if (h2s->st == H2_SS_ERROR) {
3182 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 +01003183 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau7838a792019-08-12 18:42:03 +02003184 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003185
Willy Tarreau7838a792019-08-12 18:42:03 +02003186 if (h2c->st0 == H2_CS_FRAME_E) {
3187 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 +01003188 ret = h2c_send_rst_stream(h2c, h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02003189 }
Willy Tarreau27a84c92017-10-17 08:10:17 +02003190
Willy Tarreau7e98c052017-10-10 15:56:59 +02003191 /* error or missing data condition met above ? */
Willy Tarreau7838a792019-08-12 18:42:03 +02003192 if (ret <= 0) {
3193 TRACE_DEVEL("insufficient data to proceed", H2_EV_RX_FRAME, h2c->conn, h2s);
Willy Tarreau7e98c052017-10-10 15:56:59 +02003194 break;
Willy Tarreau7838a792019-08-12 18:42:03 +02003195 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003196
3197 if (h2c->st0 != H2_CS_FRAME_H) {
Christopher Faulet5112a602019-09-26 16:38:28 +02003198 TRACE_DEVEL("stream error, skip frame payload", H2_EV_RX_FRAME, h2c->conn, h2s);
3199 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
3200 b_del(&h2c->dbuf, ret);
3201 h2c->dfl -= ret;
3202 if (!h2c->dfl) {
3203 TRACE_STATE("switching to FRAME_H", H2_EV_RX_FRAME|H2_EV_RX_FHDR, h2c->conn);
3204 h2c->st0 = H2_CS_FRAME_H;
3205 h2c->dsi = -1;
3206 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02003207 }
3208 }
Willy Tarreau52eed752017-09-22 15:05:09 +02003209
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003210 if (h2c->rcvd_c > 0 &&
Willy Tarreau7838a792019-08-12 18:42:03 +02003211 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))) {
3212 TRACE_PROTO("sending H2 WINDOW_UPDATE frame", H2_EV_TX_FRAME|H2_EV_TX_WU, h2c->conn);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003213 h2c_send_conn_wu(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003214 }
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003215
Willy Tarreau52eed752017-09-22 15:05:09 +02003216 fail:
3217 /* we can go here on missing data, blocked response or error */
Willy Tarreau567beb82018-12-18 16:52:44 +01003218 if (h2s && h2s->cs &&
3219 (b_data(&h2s->rxbuf) ||
Willy Tarreau76c83822019-06-15 09:55:50 +02003220 conn_xprt_read0_pending(h2c->conn) ||
3221 h2s->st == H2_SS_CLOSED ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02003222 (h2s->flags & H2_SF_ES_RCVD) ||
3223 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003224 /* we may have to signal the upper layers */
Willy Tarreau7838a792019-08-12 18:42:03 +02003225 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 +01003226 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01003227 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01003228 }
Willy Tarreau1ed87b72018-11-25 08:45:16 +01003229
Willy Tarreau7838a792019-08-12 18:42:03 +02003230 if (old_iw != h2c->miw) {
3231 TRACE_STATE("notifying streams about SFCTL increase", H2_EV_RX_FRAME|H2_EV_H2S_WAKE, h2c->conn);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003232 h2c_unblock_sfctl(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003233 }
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02003234
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003235 h2c_restart_reading(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02003236 out:
3237 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreaubc933932017-10-09 16:21:43 +02003238}
3239
Willy Tarreau989539b2020-01-10 17:01:29 +01003240/* resume each h2s eligible for sending in list head <head> */
3241static void h2_resume_each_sending_h2s(struct h2c *h2c, struct list *head)
3242{
3243 struct h2s *h2s, *h2s_back;
3244
3245 TRACE_ENTER(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3246
3247 list_for_each_entry_safe(h2s, h2s_back, head, list) {
3248 if (h2c->mws <= 0 ||
3249 h2c->flags & H2_CF_MUX_BLOCK_ANY ||
3250 h2c->st0 >= H2_CS_ERROR)
3251 break;
3252
3253 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003254
Willy Tarreaud9464162020-01-10 18:25:07 +01003255 if (h2s->flags & H2_SF_NOTIFIED)
Willy Tarreau70c5b0e2020-01-10 18:20:15 +01003256 continue;
3257
Willy Tarreau5723f292020-01-10 15:16:57 +01003258 /* If the sender changed his mind and unsubscribed, let's just
3259 * remove the stream from the send_list.
Willy Tarreau989539b2020-01-10 17:01:29 +01003260 */
Willy Tarreauf96508a2020-01-10 11:12:48 +01003261 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) &&
3262 (!h2s->subs || !(h2s->subs->events & SUB_RETRY_SEND))) {
Willy Tarreau989539b2020-01-10 17:01:29 +01003263 LIST_DEL_INIT(&h2s->list);
3264 continue;
3265 }
3266
Willy Tarreauf96508a2020-01-10 11:12:48 +01003267 if (h2s->subs && h2s->subs->events & SUB_RETRY_SEND) {
Willy Tarreau5723f292020-01-10 15:16:57 +01003268 h2s->flags |= H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01003269 tasklet_wakeup(h2s->subs->tasklet);
3270 h2s->subs->events &= ~SUB_RETRY_SEND;
3271 if (!h2s->subs->events)
3272 h2s->subs = NULL;
Willy Tarreau5723f292020-01-10 15:16:57 +01003273 }
3274 else if (h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW)) {
3275 tasklet_wakeup(h2s->shut_tl);
3276 }
Willy Tarreau989539b2020-01-10 17:01:29 +01003277 }
3278
3279 TRACE_LEAVE(H2_EV_H2C_SEND|H2_EV_H2S_WAKE, h2c->conn);
3280}
3281
Willy Tarreaubc933932017-10-09 16:21:43 +02003282/* process Tx frames from streams to be multiplexed. Returns > 0 if it reached
3283 * the end.
3284 */
3285static int h2_process_mux(struct h2c *h2c)
3286{
Willy Tarreau7838a792019-08-12 18:42:03 +02003287 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3288
Willy Tarreau01b44822018-10-03 14:26:37 +02003289 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
3290 if (unlikely(h2c->st0 == H2_CS_PREFACE && (h2c->flags & H2_CF_IS_BACK))) {
3291 if (unlikely(h2c_bck_send_preface(h2c) <= 0)) {
3292 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau9364a5f2019-10-23 11:06:35 +02003293 if (h2c->st0 == H2_CS_ERROR)
Willy Tarreau01b44822018-10-03 14:26:37 +02003294 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau01b44822018-10-03 14:26:37 +02003295 goto fail;
3296 }
3297 h2c->st0 = H2_CS_SETTINGS1;
3298 }
3299 /* need to wait for the other side */
Willy Tarreau75a930a2018-12-12 08:03:58 +01003300 if (h2c->st0 < H2_CS_FRAME_H)
Willy Tarreau7838a792019-08-12 18:42:03 +02003301 goto done;
Willy Tarreau01b44822018-10-03 14:26:37 +02003302 }
3303
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003304 /* start by sending possibly pending window updates */
Willy Tarreaue74679a2019-08-06 15:39:32 +02003305 if (h2c->rcvd_s > 0 &&
3306 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3307 h2c_send_strm_wu(h2c) < 0)
3308 goto fail;
3309
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003310 if (h2c->rcvd_c > 0 &&
3311 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
3312 h2c_send_conn_wu(h2c) < 0)
3313 goto fail;
3314
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003315 /* First we always process the flow control list because the streams
3316 * waiting there were already elected for immediate emission but were
3317 * blocked just on this.
3318 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003319 h2_resume_each_sending_h2s(h2c, &h2c->fctl_list);
3320 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02003321
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02003322 fail:
Willy Tarreau3eabe9b2017-11-07 11:03:01 +01003323 if (unlikely(h2c->st0 >= H2_CS_ERROR)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02003324 if (h2c->st0 == H2_CS_ERROR) {
3325 if (h2c->max_id >= 0) {
3326 h2c_send_goaway_error(h2c, NULL);
3327 if (h2c->flags & H2_CF_MUX_BLOCK_ANY)
Willy Tarreau7838a792019-08-12 18:42:03 +02003328 goto out0;
Willy Tarreau081d4722017-05-16 21:51:05 +02003329 }
3330
3331 h2c->st0 = H2_CS_ERROR2; // sent (or failed hard) !
3332 }
Willy Tarreau081d4722017-05-16 21:51:05 +02003333 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003334 done:
3335 TRACE_LEAVE(H2_EV_H2C_WAKE, h2c->conn);
3336 return 1;
3337 out0:
3338 TRACE_DEVEL("leaving in blocked situation", H2_EV_H2C_WAKE, h2c->conn);
3339 return 0;
Willy Tarreaubc933932017-10-09 16:21:43 +02003340}
3341
Willy Tarreau62f52692017-10-08 23:01:42 +02003342
Willy Tarreau479998a2018-11-18 06:30:59 +01003343/* Attempt to read data, and subscribe if none available.
3344 * The function returns 1 if data has been received, otherwise zero.
3345 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003346static int h2_recv(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003347{
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003348 struct connection *conn = h2c->conn;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003349 struct buffer *buf;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003350 int max;
Olivier Houchard7505f942018-08-21 18:10:44 +02003351 size_t ret;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003352
Willy Tarreau7838a792019-08-12 18:42:03 +02003353 TRACE_ENTER(H2_EV_H2C_RECV, h2c->conn);
3354
3355 if (h2c->wait_event.events & SUB_RETRY_RECV) {
3356 TRACE_DEVEL("leaving on sub_recv", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003357 return (b_data(&h2c->dbuf));
Willy Tarreau7838a792019-08-12 18:42:03 +02003358 }
Olivier Houchardaf4021e2018-08-09 13:06:55 +02003359
Willy Tarreau7838a792019-08-12 18:42:03 +02003360 if (!h2_recv_allowed(h2c)) {
3361 TRACE_DEVEL("leaving on !recv_allowed", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003362 return 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003363 }
Willy Tarreaua2af5122017-10-09 11:56:46 +02003364
Willy Tarreau44e973f2018-03-01 17:49:30 +01003365 buf = h2_get_buf(h2c, &h2c->dbuf);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003366 if (!buf) {
3367 h2c->flags |= H2_CF_DEM_DALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02003368 TRACE_DEVEL("leaving on !alloc", H2_EV_H2C_RECV, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003369 return 0;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02003370 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02003371
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003372 b_realign_if_empty(buf);
3373 if (!b_data(buf)) {
3374 /* try to pre-align the buffer like the
3375 * rxbufs will be to optimize memory copies. We'll make
3376 * sure that the frame header lands at the end of the
3377 * HTX block to alias it upon recv. We cannot use the
3378 * head because rcv_buf() will realign the buffer if
3379 * it's empty. Thus we cheat and pretend we already
3380 * have a few bytes there.
3381 */
3382 max = buf_room_for_htx_data(buf) + 9;
3383 buf->head = sizeof(struct htx) - 9;
3384 }
3385 else
3386 max = b_room(buf);
Willy Tarreau2a59e872018-12-12 08:23:47 +01003387
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003388 ret = max ? conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0) : 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003389
Willy Tarreau7838a792019-08-12 18:42:03 +02003390 if (max && !ret && h2_recv_allowed(h2c)) {
3391 TRACE_DATA("failed to receive data, subscribing", H2_EV_H2C_RECV, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003392 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003393 } else if (ret)
3394 TRACE_DATA("received data", H2_EV_H2C_RECV, h2c->conn,,, (void*)(long)ret);
Olivier Houchard81a15af2018-10-19 17:26:49 +02003395
Olivier Houcharda1411e62018-08-17 18:42:48 +02003396 if (!b_data(buf)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +01003397 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02003398 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Olivier Houchard46677732018-11-29 17:06:17 +01003399 return (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003400 }
3401
Willy Tarreau7838a792019-08-12 18:42:03 +02003402 if (b_data(buf) == buf->size) {
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003403 h2c->flags |= H2_CF_DEM_DFULL;
Willy Tarreau35fb8462019-10-02 11:05:46 +02003404 TRACE_STATE("demux buffer full", H2_EV_H2C_RECV|H2_EV_H2C_BLK, h2c->conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003405 }
3406
3407 TRACE_LEAVE(H2_EV_H2C_RECV, h2c->conn);
Willy Tarreau4d7a8842019-07-31 16:00:48 +02003408 return !!ret || (conn->flags & CO_FL_ERROR) || conn_xprt_read0_pending(conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003409}
3410
Willy Tarreau479998a2018-11-18 06:30:59 +01003411/* Try to send data if possible.
3412 * The function returns 1 if data have been sent, otherwise zero.
3413 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003414static int h2_send(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003415{
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003416 struct connection *conn = h2c->conn;
Willy Tarreaubc933932017-10-09 16:21:43 +02003417 int done;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003418 int sent = 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003419
Willy Tarreau7838a792019-08-12 18:42:03 +02003420 TRACE_ENTER(H2_EV_H2C_SEND, h2c->conn);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003421
Willy Tarreau7838a792019-08-12 18:42:03 +02003422 if (conn->flags & CO_FL_ERROR) {
3423 TRACE_DEVEL("leaving on error", H2_EV_H2C_SEND, h2c->conn);
3424 return 1;
3425 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003426
Willy Tarreau911db9b2020-01-23 16:27:54 +01003427 if (conn->flags & CO_FL_WAIT_XPRT) {
Willy Tarreaua2af5122017-10-09 11:56:46 +02003428 /* a handshake was requested */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003429 goto schedule;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003430 }
3431
Willy Tarreaubc933932017-10-09 16:21:43 +02003432 /* This loop is quite simple : it tries to fill as much as it can from
3433 * pending streams into the existing buffer until it's reportedly full
3434 * or the end of send requests is reached. Then it tries to send this
3435 * buffer's contents out, marks it not full if at least one byte could
3436 * be sent, and tries again.
3437 *
3438 * The snd_buf() function normally takes a "flags" argument which may
3439 * be made of a combination of CO_SFL_MSG_MORE to indicate that more
3440 * data immediately comes and CO_SFL_STREAMER to indicate that the
3441 * connection is streaming lots of data (used to increase TLS record
3442 * size at the expense of latency). The former can be sent any time
3443 * there's a buffer full flag, as it indicates at least one stream
3444 * attempted to send and failed so there are pending data. An
3445 * alternative would be to set it as long as there's an active stream
3446 * but that would be problematic for ACKs until we have an absolute
3447 * guarantee that all waiters have at least one byte to send. The
3448 * latter should possibly not be set for now.
3449 */
3450
3451 done = 0;
3452 while (!done) {
3453 unsigned int flags = 0;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003454 unsigned int released = 0;
3455 struct buffer *buf;
Willy Tarreaubc933932017-10-09 16:21:43 +02003456
3457 /* fill as much as we can into the current buffer */
3458 while (((h2c->flags & (H2_CF_MUX_MFULL|H2_CF_MUX_MALLOC)) == 0) && !done)
3459 done = h2_process_mux(h2c);
3460
Olivier Houchard2b094432019-01-29 18:28:36 +01003461 if (h2c->flags & H2_CF_MUX_MALLOC)
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003462 done = 1; // we won't go further without extra buffers
Olivier Houchard2b094432019-01-29 18:28:36 +01003463
Willy Tarreaubc933932017-10-09 16:21:43 +02003464 if (conn->flags & CO_FL_ERROR)
3465 break;
3466
3467 if (h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))
3468 flags |= CO_SFL_MSG_MORE;
3469
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003470 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3471 if (b_data(buf)) {
3472 int ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, buf, b_data(buf), flags);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003473 if (!ret) {
3474 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003475 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003476 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003477 sent = 1;
Willy Tarreau7838a792019-08-12 18:42:03 +02003478 TRACE_DATA("sent data", H2_EV_H2C_SEND, h2c->conn,, buf, (void*)(long)ret);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003479 b_del(buf, ret);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003480 if (b_data(buf)) {
3481 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003482 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003483 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003484 }
3485 b_free(buf);
3486 released++;
Willy Tarreau787db9a2018-06-14 18:31:46 +02003487 }
Willy Tarreaubc933932017-10-09 16:21:43 +02003488
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003489 if (released)
Willy Tarreau201840a2019-05-29 17:50:48 +02003490 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003491
Willy Tarreaubc933932017-10-09 16:21:43 +02003492 /* wrote at least one byte, the buffer is not full anymore */
Christopher Faulet69fe5ce2019-10-24 10:31:01 +02003493 if (sent)
3494 h2c->flags &= ~(H2_CF_MUX_MFULL | H2_CF_DEM_MROOM);
Willy Tarreaubc933932017-10-09 16:21:43 +02003495 }
3496
Willy Tarreaua2af5122017-10-09 11:56:46 +02003497 if (conn->flags & CO_FL_SOCK_WR_SH) {
3498 /* output closed, nothing to send, clear the buffer to release it */
Willy Tarreau51330962019-05-26 09:38:07 +02003499 b_reset(br_tail(h2c->mbuf));
Willy Tarreaua2af5122017-10-09 11:56:46 +02003500 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02003501 /* We're not full anymore, so we can wake any task that are waiting
3502 * for us.
3503 */
Willy Tarreau989539b2020-01-10 17:01:29 +01003504 if (!(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM)) && h2c->st0 >= H2_CS_FRAME_H)
3505 h2_resume_each_sending_h2s(h2c, &h2c->send_list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01003506
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003507 /* We're done, no more to send */
Willy Tarreau7838a792019-08-12 18:42:03 +02003508 if (!br_data(h2c->mbuf)) {
3509 TRACE_DEVEL("leaving with everything sent", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003510 return sent;
Willy Tarreau7838a792019-08-12 18:42:03 +02003511 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003512schedule:
Willy Tarreau7838a792019-08-12 18:42:03 +02003513 if (!(conn->flags & CO_FL_ERROR) && !(h2c->wait_event.events & SUB_RETRY_SEND)) {
3514 TRACE_STATE("more data to send, subscribing", H2_EV_H2C_SEND, h2c->conn);
Olivier Houcharde179d0e2019-03-21 18:27:17 +01003515 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &h2c->wait_event);
Willy Tarreau7838a792019-08-12 18:42:03 +02003516 }
Willy Tarreau7f1265a2019-05-29 17:36:37 +02003517
Willy Tarreau7838a792019-08-12 18:42:03 +02003518 TRACE_DEVEL("leaving with some data left to send", H2_EV_H2C_SEND, h2c->conn);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02003519 return sent;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003520}
3521
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003522/* this is the tasklet referenced in h2c->wait_event.tasklet */
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003523static struct task *h2_io_cb(struct task *t, void *ctx, unsigned short status)
3524{
3525 struct h2c *h2c = ctx;
Olivier Houchard7505f942018-08-21 18:10:44 +02003526 int ret = 0;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02003527
Willy Tarreau7838a792019-08-12 18:42:03 +02003528 TRACE_ENTER(H2_EV_H2C_WAKE, h2c->conn);
3529
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003530 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchard7505f942018-08-21 18:10:44 +02003531 ret = h2_send(h2c);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003532 if (!(h2c->wait_event.events & SUB_RETRY_RECV))
Olivier Houchard7505f942018-08-21 18:10:44 +02003533 ret |= h2_recv(h2c);
Willy Tarreaucef5c8e2018-12-18 10:29:54 +01003534 if (ret || b_data(&h2c->dbuf))
Olivier Houchard7505f942018-08-21 18:10:44 +02003535 h2_process(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003536
3537 TRACE_LEAVE(H2_EV_H2C_WAKE);
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003538 return NULL;
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003539}
Willy Tarreaua2af5122017-10-09 11:56:46 +02003540
Willy Tarreau62f52692017-10-08 23:01:42 +02003541/* callback called on any event by the connection handler.
3542 * It applies changes and returns zero, or < 0 if it wants immediate
3543 * destruction of the connection (which normally doesn not happen in h2).
3544 */
Olivier Houchard7505f942018-08-21 18:10:44 +02003545static int h2_process(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02003546{
Olivier Houchard7505f942018-08-21 18:10:44 +02003547 struct connection *conn = h2c->conn;
Willy Tarreaua2af5122017-10-09 11:56:46 +02003548
Willy Tarreau7838a792019-08-12 18:42:03 +02003549 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3550
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003551 if (b_data(&h2c->dbuf) && !(h2c->flags & H2_CF_DEM_BLOCK_ANY)) {
Willy Tarreaud13bf272017-12-14 10:34:52 +01003552 h2_process_demux(h2c);
3553
3554 if (h2c->st0 >= H2_CS_ERROR || conn->flags & CO_FL_ERROR)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003555 b_reset(&h2c->dbuf);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003556
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003557 if (!b_full(&h2c->dbuf))
Willy Tarreaud13bf272017-12-14 10:34:52 +01003558 h2c->flags &= ~H2_CF_DEM_DFULL;
3559 }
Olivier Houchard7505f942018-08-21 18:10:44 +02003560 h2_send(h2c);
Willy Tarreaud13bf272017-12-14 10:34:52 +01003561
Willy Tarreau0b37d652018-10-03 10:33:02 +02003562 if (unlikely(h2c->proxy->state == PR_STSTOPPED)) {
Willy Tarreau8ec14062017-12-30 18:08:13 +01003563 /* frontend is stopping, reload likely in progress, let's try
3564 * to announce a graceful shutdown if not yet done. We don't
3565 * care if it fails, it will be tried again later.
3566 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003567 TRACE_STATE("proxy stopped, sending GOAWAY", H2_EV_H2C_WAKE|H2_EV_TX_FRAME, conn);
Willy Tarreau8ec14062017-12-30 18:08:13 +01003568 if (!(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
3569 if (h2c->last_sid < 0)
3570 h2c->last_sid = (1U << 31) - 1;
3571 h2c_send_goaway_error(h2c, NULL);
3572 }
3573 }
3574
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003575 /*
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003576 * If we received early data, and the handshake is done, wake
3577 * any stream that was waiting for it.
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003578 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003579 if (!(h2c->flags & H2_CF_WAIT_FOR_HS) &&
Willy Tarreau911db9b2020-01-23 16:27:54 +01003580 (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_WAIT_XPRT | CO_FL_EARLY_DATA)) == CO_FL_EARLY_DATA) {
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003581 struct eb32_node *node;
3582 struct h2s *h2s;
3583
3584 h2c->flags |= H2_CF_WAIT_FOR_HS;
3585 node = eb32_lookup_ge(&h2c->streams_by_id, 1);
3586
3587 while (node) {
3588 h2s = container_of(node, struct h2s, by_id);
Willy Tarreaufde287c2018-12-19 18:33:16 +01003589 if (h2s->cs && h2s->cs->flags & CS_FL_WAIT_FOR_HS)
Willy Tarreau7e094452018-12-19 18:08:52 +01003590 h2s_notify_recv(h2s);
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003591 node = eb32_next(node);
3592 }
Olivier Houchard7fc96d52017-11-23 18:25:47 +01003593 }
Olivier Houchard6fa63d92017-11-27 18:41:32 +01003594
Willy Tarreau26bd7612017-10-09 16:47:04 +02003595 if (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn) ||
Willy Tarreau29a98242017-10-31 06:59:15 +01003596 h2c->st0 == H2_CS_ERROR2 || h2c->flags & H2_CF_GOAWAY_FAILED ||
3597 (eb_is_empty(&h2c->streams_by_id) && h2c->last_sid >= 0 &&
3598 h2c->max_id >= h2c->last_sid)) {
Willy Tarreau23482912019-05-07 15:23:14 +02003599 h2_wake_some_streams(h2c, 0);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003600
3601 if (eb_is_empty(&h2c->streams_by_id)) {
3602 /* no more stream, kill the connection now */
Christopher Faulet73c12072019-04-08 11:23:22 +02003603 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003604 TRACE_DEVEL("leaving after releasing the connection", H2_EV_H2C_WAKE);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003605 return -1;
3606 }
Willy Tarreau4481e262019-10-31 15:36:30 +01003607
3608 /* connections in error must be removed from the idle lists */
3609 HA_SPIN_LOCK(OTHER_LOCK, &toremove_lock[tid]);
3610 MT_LIST_DEL((struct mt_list *)&conn->list);
3611 HA_SPIN_UNLOCK(OTHER_LOCK, &toremove_lock[tid]);
3612 }
3613 else if (h2c->st0 == H2_CS_ERROR) {
3614 /* connections in error must be removed from the idle lists */
3615 HA_SPIN_LOCK(OTHER_LOCK, &toremove_lock[tid]);
3616 MT_LIST_DEL((struct mt_list *)&conn->list);
3617 HA_SPIN_UNLOCK(OTHER_LOCK, &toremove_lock[tid]);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003618 }
3619
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003620 if (!b_data(&h2c->dbuf))
Willy Tarreau44e973f2018-03-01 17:49:30 +01003621 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02003622
Olivier Houchard53216e72018-10-10 15:46:36 +02003623 if ((conn->flags & CO_FL_SOCK_WR_SH) ||
3624 h2c->st0 == H2_CS_ERROR2 || (h2c->flags & H2_CF_GOAWAY_FAILED) ||
3625 (h2c->st0 != H2_CS_ERROR &&
Willy Tarreau662fafc2019-05-26 09:43:07 +02003626 !br_data(h2c->mbuf) &&
Olivier Houchard53216e72018-10-10 15:46:36 +02003627 (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) &&
3628 ((h2c->flags & H2_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&h2c->send_list))))
Willy Tarreau2e3c0002019-05-26 09:45:23 +02003629 h2_release_mbuf(h2c);
Willy Tarreaua2af5122017-10-09 11:56:46 +02003630
Willy Tarreau3f133572017-10-31 19:21:06 +01003631 if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02003632 if (h2c_may_expire(h2c))
3633 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
3634 else
3635 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02003636 task_queue(h2c->task);
Willy Tarreauea392822017-10-31 10:02:25 +01003637 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02003638
Olivier Houchard7505f942018-08-21 18:10:44 +02003639 h2_send(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003640 TRACE_LEAVE(H2_EV_H2C_WAKE, conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003641 return 0;
3642}
3643
Willy Tarreau749f5ca2019-03-21 19:19:36 +01003644/* wake-up function called by the connection layer (mux_ops.wake) */
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003645static int h2_wake(struct connection *conn)
3646{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003647 struct h2c *h2c = conn->ctx;
Willy Tarreau7838a792019-08-12 18:42:03 +02003648 int ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003649
Willy Tarreau7838a792019-08-12 18:42:03 +02003650 TRACE_ENTER(H2_EV_H2C_WAKE, conn);
3651 ret = h2_process(h2c);
Willy Tarreau508f9892020-02-11 04:38:56 +01003652 if (ret >= 0)
3653 h2_wake_some_streams(h2c, 0);
Willy Tarreau7838a792019-08-12 18:42:03 +02003654 TRACE_LEAVE(H2_EV_H2C_WAKE);
3655 return ret;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003656}
3657
Willy Tarreauea392822017-10-31 10:02:25 +01003658/* Connection timeout management. The principle is that if there's no receipt
3659 * nor sending for a certain amount of time, the connection is closed. If the
3660 * MUX buffer still has lying data or is not allocatable, the connection is
3661 * immediately killed. If it's allocatable and empty, we attempt to send a
3662 * GOAWAY frame.
3663 */
Olivier Houchard9f6af332018-05-25 14:04:04 +02003664static struct task *h2_timeout_task(struct task *t, void *context, unsigned short state)
Willy Tarreauea392822017-10-31 10:02:25 +01003665{
Olivier Houchard9f6af332018-05-25 14:04:04 +02003666 struct h2c *h2c = context;
Willy Tarreauea392822017-10-31 10:02:25 +01003667 int expired = tick_is_expired(t->expire, now_ms);
3668
Willy Tarreau7838a792019-08-12 18:42:03 +02003669 TRACE_ENTER(H2_EV_H2C_WAKE, h2c ? h2c->conn : NULL);
3670
3671 if (!expired && h2c) {
3672 TRACE_DEVEL("leaving (not expired)", H2_EV_H2C_WAKE, h2c->conn);
Willy Tarreauea392822017-10-31 10:02:25 +01003673 return t;
Willy Tarreau7838a792019-08-12 18:42:03 +02003674 }
Willy Tarreauea392822017-10-31 10:02:25 +01003675
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02003676 if (h2c && !h2c_may_expire(h2c)) {
3677 /* we do still have streams but all of them are idle, waiting
3678 * for the data layer, so we must not enforce the timeout here.
3679 */
3680 t->expire = TICK_ETERNITY;
3681 return t;
3682 }
3683
Olivier Houchard3f795f72019-04-17 22:51:06 +02003684 task_destroy(t);
Willy Tarreau0975f112018-03-29 15:22:59 +02003685
3686 if (!h2c) {
3687 /* resources were already deleted */
Willy Tarreau7838a792019-08-12 18:42:03 +02003688 TRACE_DEVEL("leaving (not more h2c)", H2_EV_H2C_WAKE);
Willy Tarreau0975f112018-03-29 15:22:59 +02003689 return NULL;
3690 }
3691
3692 h2c->task = NULL;
Willy Tarreauea392822017-10-31 10:02:25 +01003693 h2c_error(h2c, H2_ERR_NO_ERROR);
Willy Tarreau23482912019-05-07 15:23:14 +02003694 h2_wake_some_streams(h2c, 0);
Willy Tarreauea392822017-10-31 10:02:25 +01003695
Willy Tarreau662fafc2019-05-26 09:43:07 +02003696 if (br_data(h2c->mbuf)) {
Willy Tarreauea392822017-10-31 10:02:25 +01003697 /* don't even try to send a GOAWAY, the buffer is stuck */
3698 h2c->flags |= H2_CF_GOAWAY_FAILED;
3699 }
3700
3701 /* try to send but no need to insist */
Willy Tarreau599391a2017-11-24 10:16:00 +01003702 h2c->last_sid = h2c->max_id;
Willy Tarreauea392822017-10-31 10:02:25 +01003703 if (h2c_send_goaway_error(h2c, NULL) <= 0)
3704 h2c->flags |= H2_CF_GOAWAY_FAILED;
3705
Willy Tarreau662fafc2019-05-26 09:43:07 +02003706 if (br_data(h2c->mbuf) && !(h2c->flags & H2_CF_GOAWAY_FAILED) && conn_xprt_ready(h2c->conn)) {
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003707 unsigned int released = 0;
3708 struct buffer *buf;
3709
3710 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3711 if (b_data(buf)) {
3712 int ret = h2c->conn->xprt->snd_buf(h2c->conn, h2c->conn->xprt_ctx, buf, b_data(buf), 0);
3713 if (!ret)
3714 break;
3715 b_del(buf, ret);
3716 if (b_data(buf))
3717 break;
3718 b_free(buf);
3719 released++;
3720 }
Willy Tarreau787db9a2018-06-14 18:31:46 +02003721 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003722
3723 if (released)
Willy Tarreau201840a2019-05-29 17:50:48 +02003724 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau787db9a2018-06-14 18:31:46 +02003725 }
Willy Tarreauea392822017-10-31 10:02:25 +01003726
Willy Tarreau4481e262019-10-31 15:36:30 +01003727 /* in any case this connection must not be considered idle anymore */
3728 HA_SPIN_LOCK(OTHER_LOCK, &toremove_lock[tid]);
3729 MT_LIST_DEL((struct mt_list *)&h2c->conn->list);
3730 HA_SPIN_UNLOCK(OTHER_LOCK, &toremove_lock[tid]);
3731
Willy Tarreau0975f112018-03-29 15:22:59 +02003732 /* either we can release everything now or it will be done later once
3733 * the last stream closes.
3734 */
3735 if (eb_is_empty(&h2c->streams_by_id))
Christopher Faulet73c12072019-04-08 11:23:22 +02003736 h2_release(h2c);
Willy Tarreauea392822017-10-31 10:02:25 +01003737
Willy Tarreau7838a792019-08-12 18:42:03 +02003738 TRACE_LEAVE(H2_EV_H2C_WAKE);
Willy Tarreauea392822017-10-31 10:02:25 +01003739 return NULL;
3740}
3741
3742
Willy Tarreau62f52692017-10-08 23:01:42 +02003743/*******************************************/
3744/* functions below are used by the streams */
3745/*******************************************/
3746
3747/*
3748 * Attach a new stream to a connection
3749 * (Used for outgoing connections)
3750 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01003751static struct conn_stream *h2_attach(struct connection *conn, struct session *sess)
Willy Tarreau62f52692017-10-08 23:01:42 +02003752{
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003753 struct conn_stream *cs;
3754 struct h2s *h2s;
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003755 struct h2c *h2c = conn->ctx;
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003756
Willy Tarreau7838a792019-08-12 18:42:03 +02003757 TRACE_ENTER(H2_EV_H2S_NEW, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003758 cs = cs_new(conn);
Willy Tarreau7838a792019-08-12 18:42:03 +02003759 if (!cs) {
3760 TRACE_DEVEL("leaving on CS allocation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003761 return NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02003762 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01003763 h2s = h2c_bck_stream_new(h2c, cs, sess);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003764 if (!h2s) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003765 TRACE_DEVEL("leaving on stream creation failure", H2_EV_H2S_NEW|H2_EV_H2S_ERR, conn);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003766 cs_free(cs);
3767 return NULL;
3768 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003769 TRACE_LEAVE(H2_EV_H2S_NEW, conn, h2s);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003770 return cs;
Willy Tarreau62f52692017-10-08 23:01:42 +02003771}
3772
Willy Tarreaufafd3982018-11-18 21:29:20 +01003773/* Retrieves the first valid conn_stream from this connection, or returns NULL.
3774 * We have to scan because we may have some orphan streams. It might be
3775 * beneficial to scan backwards from the end to reduce the likeliness to find
3776 * orphans.
3777 */
3778static const struct conn_stream *h2_get_first_cs(const struct connection *conn)
3779{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003780 struct h2c *h2c = conn->ctx;
Willy Tarreaufafd3982018-11-18 21:29:20 +01003781 struct h2s *h2s;
3782 struct eb32_node *node;
3783
3784 node = eb32_first(&h2c->streams_by_id);
3785 while (node) {
3786 h2s = container_of(node, struct h2s, by_id);
3787 if (h2s->cs)
3788 return h2s->cs;
3789 node = eb32_next(node);
3790 }
3791 return NULL;
3792}
3793
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02003794static int h2_ctl(struct connection *conn, enum mux_ctl_type mux_ctl, void *output)
3795{
3796 int ret = 0;
3797 struct h2c *h2c = conn->ctx;
3798
3799 switch (mux_ctl) {
3800 case MUX_STATUS:
3801 /* Only consider the mux to be ready if we're done with
3802 * the preface and settings, and we had no error.
3803 */
3804 if (h2c->st0 >= H2_CS_FRAME_H && h2c->st0 < H2_CS_ERROR)
3805 ret |= MUX_STATUS_READY;
3806 return ret;
3807 default:
3808 return -1;
3809 }
3810}
3811
Willy Tarreau62f52692017-10-08 23:01:42 +02003812/*
Olivier Houchard060ed432018-11-06 16:32:42 +01003813 * Destroy the mux and the associated connection, if it is no longer used
3814 */
Christopher Faulet73c12072019-04-08 11:23:22 +02003815static void h2_destroy(void *ctx)
Olivier Houchard060ed432018-11-06 16:32:42 +01003816{
Christopher Faulet73c12072019-04-08 11:23:22 +02003817 struct h2c *h2c = ctx;
Olivier Houchard060ed432018-11-06 16:32:42 +01003818
Willy Tarreau7838a792019-08-12 18:42:03 +02003819 TRACE_ENTER(H2_EV_H2C_END, h2c->conn);
Christopher Faulet39a96ee2019-04-08 10:52:21 +02003820 if (eb_is_empty(&h2c->streams_by_id) || !h2c->conn || h2c->conn->ctx != h2c)
Christopher Faulet73c12072019-04-08 11:23:22 +02003821 h2_release(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003822 TRACE_LEAVE(H2_EV_H2C_END);
Olivier Houchard060ed432018-11-06 16:32:42 +01003823}
3824
3825/*
Willy Tarreau62f52692017-10-08 23:01:42 +02003826 * Detach the stream from the connection and possibly release the connection.
3827 */
3828static void h2_detach(struct conn_stream *cs)
3829{
Willy Tarreau60935142017-10-16 18:11:19 +02003830 struct h2s *h2s = cs->ctx;
3831 struct h2c *h2c;
Olivier Houchardf502aca2018-12-14 19:42:40 +01003832 struct session *sess;
Willy Tarreau60935142017-10-16 18:11:19 +02003833
Willy Tarreau7838a792019-08-12 18:42:03 +02003834 TRACE_ENTER(H2_EV_STRM_END, h2s ? h2s->h2c->conn : NULL, h2s);
3835
Willy Tarreau60935142017-10-16 18:11:19 +02003836 cs->ctx = NULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02003837 if (!h2s) {
3838 TRACE_LEAVE(H2_EV_STRM_END);
Willy Tarreau60935142017-10-16 18:11:19 +02003839 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02003840 }
Willy Tarreau60935142017-10-16 18:11:19 +02003841
Willy Tarreaud9464162020-01-10 18:25:07 +01003842 /* there's no txbuf so we're certain not to be able to send anything */
3843 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02003844
Olivier Houchardf502aca2018-12-14 19:42:40 +01003845 sess = h2s->sess;
Willy Tarreau60935142017-10-16 18:11:19 +02003846 h2c = h2s->h2c;
3847 h2s->cs = NULL;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02003848 h2c->nb_cs--;
Willy Tarreaufa1d3572019-01-31 10:31:51 +01003849 if ((h2c->flags & (H2_CF_IS_BACK|H2_CF_DEM_TOOMANY)) == H2_CF_DEM_TOOMANY &&
3850 !h2_frt_has_too_many_cs(h2c)) {
3851 /* frontend connection was blocking new streams creation */
Willy Tarreauf2101912018-07-19 10:11:38 +02003852 h2c->flags &= ~H2_CF_DEM_TOOMANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003853 h2c_restart_reading(h2c, 1);
Willy Tarreauf2101912018-07-19 10:11:38 +02003854 }
Willy Tarreau60935142017-10-16 18:11:19 +02003855
Willy Tarreau22cf59b2017-11-10 11:42:33 +01003856 /* this stream may be blocked waiting for some data to leave (possibly
3857 * an ES or RST frame), so orphan it in this case.
3858 */
Willy Tarreau3041fcc2018-03-29 15:41:32 +02003859 if (!(cs->conn->flags & CO_FL_ERROR) &&
Willy Tarreaua2b51812018-07-27 09:55:14 +02003860 (h2c->st0 < H2_CS_ERROR) &&
Willy Tarreau5723f292020-01-10 15:16:57 +01003861 (h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL)) &&
Willy Tarreauf96508a2020-01-10 11:12:48 +01003862 ((h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)) || h2s->subs)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003863 TRACE_DEVEL("leaving on stream blocked", H2_EV_STRM_END|H2_EV_H2S_BLK, h2c->conn, h2s);
Willy Tarreau22cf59b2017-11-10 11:42:33 +01003864 return;
Willy Tarreau7838a792019-08-12 18:42:03 +02003865 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01003866
Willy Tarreau45f752e2017-10-30 15:44:59 +01003867 if ((h2c->flags & H2_CF_DEM_BLOCK_ANY && h2s->id == h2c->dsi) ||
3868 (h2c->flags & H2_CF_MUX_BLOCK_ANY && h2s->id == h2c->msi)) {
3869 /* unblock the connection if it was blocked on this
3870 * stream.
3871 */
3872 h2c->flags &= ~H2_CF_DEM_BLOCK_ANY;
3873 h2c->flags &= ~H2_CF_MUX_BLOCK_ANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003874 h2c_restart_reading(h2c, 1);
Willy Tarreau45f752e2017-10-30 15:44:59 +01003875 }
3876
Willy Tarreau71049cc2018-03-28 13:56:39 +02003877 h2s_destroy(h2s);
Willy Tarreau60935142017-10-16 18:11:19 +02003878
Christopher Faulet9b79a102019-07-15 11:22:56 +02003879 if (h2c->flags & H2_CF_IS_BACK) {
Olivier Houchard8a786902018-12-15 16:05:40 +01003880 if (!(h2c->conn->flags &
3881 (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH))) {
3882 if (!h2c->conn->owner) {
Olivier Houchardf502aca2018-12-14 19:42:40 +01003883 h2c->conn->owner = sess;
Olivier Houchard351411f2018-12-27 17:20:54 +01003884 if (!session_add_conn(sess, h2c->conn, h2c->conn->target)) {
3885 h2c->conn->owner = NULL;
3886 if (eb_is_empty(&h2c->streams_by_id)) {
3887 if (!srv_add_to_idle_list(objt_server(h2c->conn->target), h2c->conn))
3888 /* The server doesn't want it, let's kill the connection right away */
Olivier Houchard12ffab02020-02-14 13:23:45 +01003889 h2c->conn->mux->destroy(h2c);
Willy Tarreau7838a792019-08-12 18:42:03 +02003890 TRACE_DEVEL("leaving on error after killing outgoing connection", H2_EV_STRM_END|H2_EV_H2C_ERR);
Olivier Houchard351411f2018-12-27 17:20:54 +01003891 return;
3892 }
3893 }
Olivier Houchard8a786902018-12-15 16:05:40 +01003894 }
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003895 if (eb_is_empty(&h2c->streams_by_id)) {
Christopher Fauletb2d930e2019-09-26 16:15:10 +02003896 if (session_check_idle_conn(h2c->conn->owner, h2c->conn) != 0) {
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003897 /* 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 +02003898 TRACE_DEVEL("leaving without reusable idle connection", H2_EV_STRM_END);
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003899 return;
Christopher Fauletb2d930e2019-09-26 16:15:10 +02003900 }
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003901 }
Olivier Houchard8a786902018-12-15 16:05:40 +01003902 /* Never ever allow to reuse a connection from a non-reuse backend */
3903 if ((h2c->proxy->options & PR_O_REUSE_MASK) == PR_O_REUSE_NEVR)
3904 h2c->conn->flags |= CO_FL_PRIVATE;
Willy Tarreauc234ae32019-05-13 17:56:11 +02003905 if (!LIST_ADDED(&h2c->conn->list) && h2c->nb_streams < h2c->streams_limit) {
Olivier Houchard8a786902018-12-15 16:05:40 +01003906 struct server *srv = objt_server(h2c->conn->target);
3907
3908 if (srv) {
3909 if (h2c->conn->flags & CO_FL_PRIVATE)
3910 LIST_ADD(&srv->priv_conns[tid], &h2c->conn->list);
3911 else
3912 LIST_ADD(&srv->idle_conns[tid], &h2c->conn->list);
3913 }
3914
3915 }
3916 }
3917 }
3918
Willy Tarreaue323f342018-03-28 13:51:45 +02003919 /* We don't want to close right now unless we're removing the
3920 * last stream, and either the connection is in error, or it
3921 * reached the ID already specified in a GOAWAY frame received
3922 * or sent (as seen by last_sid >= 0).
3923 */
Olivier Houchard7a977432019-03-21 15:47:13 +01003924 if (h2c_is_dead(h2c)) {
Willy Tarreaue323f342018-03-28 13:51:45 +02003925 /* no more stream will come, kill it now */
Willy Tarreau7838a792019-08-12 18:42:03 +02003926 TRACE_DEVEL("leaving and killing dead connection", H2_EV_STRM_END, h2c->conn);
Christopher Faulet73c12072019-04-08 11:23:22 +02003927 h2_release(h2c);
Willy Tarreaue323f342018-03-28 13:51:45 +02003928 }
3929 else if (h2c->task) {
Willy Tarreauc2ea47f2019-10-01 10:12:00 +02003930 if (h2c_may_expire(h2c))
3931 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
3932 else
3933 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau73481192019-06-07 08:20:46 +02003934 task_queue(h2c->task);
Willy Tarreau7838a792019-08-12 18:42:03 +02003935 TRACE_DEVEL("leaving, refreshing connection's timeout", H2_EV_STRM_END, h2c->conn);
Willy Tarreau60935142017-10-16 18:11:19 +02003936 }
Willy Tarreau7838a792019-08-12 18:42:03 +02003937 else
3938 TRACE_DEVEL("leaving", H2_EV_STRM_END, h2c->conn);
Willy Tarreau62f52692017-10-08 23:01:42 +02003939}
3940
Willy Tarreau88bdba32019-05-13 18:17:53 +02003941/* Performs a synchronous or asynchronous shutr(). */
3942static void h2_do_shutr(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02003943{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003944 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003945
Willy Tarreauf983d002019-05-14 10:40:21 +02003946 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02003947 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003948
Willy Tarreau7838a792019-08-12 18:42:03 +02003949 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
3950
Willy Tarreau18059042019-01-31 19:12:48 +01003951 /* a connstream may require us to immediately kill the whole connection
3952 * for example because of a "tcp-request content reject" rule that is
3953 * normally used to limit abuse. In this case we schedule a goaway to
3954 * close the connection.
Willy Tarreau926fa4c2017-11-07 14:42:12 +01003955 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02003956 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01003957 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02003958 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01003959 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
3960 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
3961 }
Christopher Faulet35757d32019-03-07 15:51:33 +01003962 else if (!(h2s->flags & H2_SF_HEADERS_SENT)) {
3963 /* Nothing was never sent for this stream, so reset with
3964 * REFUSED_STREAM error to let the client retry the
3965 * request.
3966 */
Willy Tarreau7838a792019-08-12 18:42:03 +02003967 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01003968 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
3969 }
Willy Tarreaucfba9d62019-08-06 10:30:58 +02003970 else {
3971 /* a final response was already provided, we don't want this
3972 * stream anymore. This may happen when the server responds
3973 * before the end of an upload and closes quickly (redirect,
3974 * deny, ...)
3975 */
3976 h2s_error(h2s, H2_ERR_CANCEL);
3977 }
Willy Tarreau18059042019-01-31 19:12:48 +01003978
Willy Tarreau90c32322017-11-24 08:00:30 +01003979 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003980 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02003981 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01003982
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003983 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02003984 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau00dd0782018-03-01 16:31:34 +01003985 h2s_close(h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02003986 done:
3987 h2s->flags &= ~H2_SF_WANT_SHUTR;
Willy Tarreau7838a792019-08-12 18:42:03 +02003988 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02003989 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003990add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01003991 /* Let the handler know we want to shutr, and add ourselves to the
3992 * most relevant list if not yet done. h2_deferred_shut() will be
3993 * automatically called via the shut_tl tasklet when there's room
3994 * again.
3995 */
3996 h2s->flags |= H2_SF_WANT_SHUTR;
Willy Tarreauc234ae32019-05-13 17:56:11 +02003997 if (!LIST_ADDED(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01003998 if (h2s->flags & H2_SF_BLK_MFCTL)
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003999 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004000 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004001 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004002 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004003 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004004 return;
Willy Tarreau62f52692017-10-08 23:01:42 +02004005}
4006
Willy Tarreau88bdba32019-05-13 18:17:53 +02004007/* Performs a synchronous or asynchronous shutw(). */
4008static void h2_do_shutw(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02004009{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004010 struct h2c *h2c = h2s->h2c;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004011
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004012 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004013 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004014
Willy Tarreau7838a792019-08-12 18:42:03 +02004015 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4016
Willy Tarreaucfba9d62019-08-06 10:30:58 +02004017 if (h2s->st != H2_SS_ERROR && (h2s->flags & H2_SF_HEADERS_SENT)) {
Willy Tarreau58e32082017-11-07 14:41:09 +01004018 /* we can cleanly close using an empty data frame only after headers */
4019
4020 if (!(h2s->flags & (H2_SF_ES_SENT|H2_SF_RST_SENT)) &&
4021 h2_send_empty_data_es(h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004022 goto add_to_list;
Willy Tarreau58e32082017-11-07 14:41:09 +01004023
4024 if (h2s->st == H2_SS_HREM)
Willy Tarreau00dd0782018-03-01 16:31:34 +01004025 h2s_close(h2s);
Willy Tarreau58e32082017-11-07 14:41:09 +01004026 else
4027 h2s->st = H2_SS_HLOC;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004028 } else {
Willy Tarreau18059042019-01-31 19:12:48 +01004029 /* a connstream may require us to immediately kill the whole connection
4030 * for example because of a "tcp-request content reject" rule that is
4031 * normally used to limit abuse. In this case we schedule a goaway to
4032 * close the connection.
Willy Tarreaua1349f02017-10-31 07:41:55 +01004033 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004034 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01004035 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004036 TRACE_STATE("stream wants to kill the connection", H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau18059042019-01-31 19:12:48 +01004037 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
4038 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
4039 }
Christopher Faulet35757d32019-03-07 15:51:33 +01004040 else {
4041 /* Nothing was never sent for this stream, so reset with
4042 * REFUSED_STREAM error to let the client retry the
4043 * request.
4044 */
Willy Tarreau7838a792019-08-12 18:42:03 +02004045 TRACE_STATE("no headers sent yet, trying a retryable abort", H2_EV_STRM_SHUT, h2c->conn, h2s);
Christopher Faulet35757d32019-03-07 15:51:33 +01004046 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
4047 }
Willy Tarreau18059042019-01-31 19:12:48 +01004048
Willy Tarreau90c32322017-11-24 08:00:30 +01004049 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004050 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004051 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01004052
Willy Tarreau00dd0782018-03-01 16:31:34 +01004053 h2s_close(h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01004054 }
4055
Willy Tarreau4f6516d2018-12-19 13:59:17 +01004056 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02004057 tasklet_wakeup(h2c->wait_event.tasklet);
Willy Tarreau7838a792019-08-12 18:42:03 +02004058
4059 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
4060
Willy Tarreau88bdba32019-05-13 18:17:53 +02004061 done:
4062 h2s->flags &= ~H2_SF_WANT_SHUTW;
4063 return;
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004064
4065 add_to_list:
Willy Tarreau5723f292020-01-10 15:16:57 +01004066 /* Let the handler know we want to shutw, and add ourselves to the
4067 * most relevant list if not yet done. h2_deferred_shut() will be
4068 * automatically called via the shut_tl tasklet when there's room
4069 * again.
4070 */
4071 h2s->flags |= H2_SF_WANT_SHUTW;
Willy Tarreauc234ae32019-05-13 17:56:11 +02004072 if (!LIST_ADDED(&h2s->list)) {
Willy Tarreau5723f292020-01-10 15:16:57 +01004073 if (h2s->flags & H2_SF_BLK_MFCTL)
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004074 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
Willy Tarreau5723f292020-01-10 15:16:57 +01004075 else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM))
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004076 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02004077 }
Willy Tarreau7838a792019-08-12 18:42:03 +02004078 TRACE_LEAVE(H2_EV_STRM_SHUT, h2c->conn, h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02004079 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004080}
4081
Willy Tarreau5723f292020-01-10 15:16:57 +01004082/* This is the tasklet referenced in h2s->shut_tl, it is used for
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004083 * deferred shutdowns when the h2_detach() was done but the mux buffer was full
4084 * and prevented the last frame from being emitted.
4085 */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004086static struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned short state)
4087{
4088 struct h2s *h2s = ctx;
Willy Tarreau88bdba32019-05-13 18:17:53 +02004089 struct h2c *h2c = h2s->h2c;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004090
Willy Tarreau7838a792019-08-12 18:42:03 +02004091 TRACE_ENTER(H2_EV_STRM_SHUT, h2c->conn, h2s);
4092
Willy Tarreau5723f292020-01-10 15:16:57 +01004093 if (h2s->flags & H2_SF_NOTIFIED) {
4094 /* some data processing remains to be done first */
4095 goto end;
4096 }
4097
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004098 if (h2s->flags & H2_SF_WANT_SHUTW)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004099 h2_do_shutw(h2s);
4100
Willy Tarreau2c249eb2019-05-13 18:06:17 +02004101 if (h2s->flags & H2_SF_WANT_SHUTR)
Willy Tarreau88bdba32019-05-13 18:17:53 +02004102 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004103
Willy Tarreau88bdba32019-05-13 18:17:53 +02004104 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004105 /* We're done trying to send, remove ourself from the send_list */
Olivier Houchardafc7cb82019-03-25 14:08:01 +01004106 LIST_DEL_INIT(&h2s->list);
Olivier Houchard7a977432019-03-21 15:47:13 +01004107
Willy Tarreau88bdba32019-05-13 18:17:53 +02004108 if (!h2s->cs) {
4109 h2s_destroy(h2s);
4110 if (h2c_is_dead(h2c))
4111 h2_release(h2c);
4112 }
Olivier Houchard7a977432019-03-21 15:47:13 +01004113 }
Willy Tarreau5723f292020-01-10 15:16:57 +01004114 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02004115 TRACE_LEAVE(H2_EV_STRM_SHUT);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004116 return NULL;
Willy Tarreau62f52692017-10-08 23:01:42 +02004117}
4118
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004119/* shutr() called by the conn_stream (mux_ops.shutr) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004120static void h2_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
4121{
4122 struct h2s *h2s = cs->ctx;
4123
Willy Tarreau7838a792019-08-12 18:42:03 +02004124 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004125 if (cs->flags & CS_FL_KILL_CONN)
4126 h2s->flags |= H2_SF_KILL_CONN;
4127
Willy Tarreau7838a792019-08-12 18:42:03 +02004128 if (mode)
4129 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004130
Willy Tarreau7838a792019-08-12 18:42:03 +02004131 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004132}
4133
Willy Tarreau749f5ca2019-03-21 19:19:36 +01004134/* shutw() called by the conn_stream (mux_ops.shutw) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004135static void h2_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
4136{
4137 struct h2s *h2s = cs->ctx;
4138
Willy Tarreau7838a792019-08-12 18:42:03 +02004139 TRACE_ENTER(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02004140 if (cs->flags & CS_FL_KILL_CONN)
4141 h2s->flags |= H2_SF_KILL_CONN;
4142
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004143 h2_do_shutw(h2s);
Willy Tarreau7838a792019-08-12 18:42:03 +02004144 TRACE_LEAVE(H2_EV_STRM_SHUT, h2s->h2c->conn, h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004145}
4146
Christopher Faulet9b79a102019-07-15 11:22:56 +02004147/* Decode the payload of a HEADERS frame and produce the HTX request or response
4148 * depending on the connection's side. Returns a positive value on success, a
4149 * negative value on failure, or 0 if it couldn't proceed. May report connection
4150 * errors in h2c->errcode if the frame is non-decodable and the connection
4151 * unrecoverable. In absence of connection error when a failure is reported, the
4152 * caller must assume a stream error.
Willy Tarreauea18f862018-12-22 20:19:26 +01004153 *
4154 * The function may fold CONTINUATION frames into the initial HEADERS frame
4155 * by removing padding and next frame header, then moving the CONTINUATION
4156 * frame's payload and adjusting h2c->dfl to match the new aggregated frame,
4157 * leaving a hole between the main frame and the beginning of the next one.
4158 * The possibly remaining incomplete or next frame at the end may be moved
4159 * if the aggregated frame is not deleted, in order to fill the hole. Wrapped
4160 * HEADERS frames are unwrapped into a temporary buffer before decoding.
4161 *
4162 * A buffer at the beginning of processing may look like this :
4163 *
4164 * ,---.---------.-----.--------------.--------------.------.---.
4165 * |///| HEADERS | PAD | CONTINUATION | CONTINUATION | DATA |///|
4166 * `---^---------^-----^--------------^--------------^------^---'
4167 * | | <-----> | |
4168 * area | dpl | wrap
4169 * |<--------------> |
4170 * | dfl |
4171 * |<-------------------------------------------------->|
4172 * head data
4173 *
4174 * Padding is automatically overwritten when folding, participating to the
4175 * hole size after dfl :
4176 *
4177 * ,---.------------------------.-----.--------------.------.---.
4178 * |///| HEADERS : CONTINUATION |/////| CONTINUATION | DATA |///|
4179 * `---^------------------------^-----^--------------^------^---'
4180 * | | <-----> | |
4181 * area | hole | wrap
4182 * |<-----------------------> |
4183 * | dfl |
4184 * |<-------------------------------------------------->|
4185 * head data
4186 *
4187 * Please note that the HEADERS frame is always deprived from its PADLEN byte
4188 * however it may start with the 5 stream-dep+weight bytes in case of PRIORITY
4189 * bit.
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004190 *
4191 * The <flags> field must point to either the stream's flags or to a copy of it
4192 * so that the function can update the following flags :
4193 * - H2_SF_DATA_CLEN when content-length is seen
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004194 * - H2_SF_HEADERS_RCVD once the frame is successfully decoded
Willy Tarreau88d138e2019-01-02 19:38:14 +01004195 *
4196 * The H2_SF_HEADERS_RCVD flag is also looked at in the <flags> field prior to
4197 * decoding, in order to detect if we're dealing with a headers or a trailers
4198 * block (the trailers block appears after H2_SF_HEADERS_RCVD was seen).
Willy Tarreau13278b42017-10-13 19:23:14 +02004199 */
Willy Tarreau4790f7c2019-01-24 11:33:02 +01004200static 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 +02004201{
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004202 const uint8_t *hdrs = (uint8_t *)b_head(&h2c->dbuf);
Willy Tarreau83061a82018-07-13 11:56:34 +02004203 struct buffer *tmp = get_trash_chunk();
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004204 struct http_hdr list[global.tune.max_http_hdr * 2];
Willy Tarreau83061a82018-07-13 11:56:34 +02004205 struct buffer *copy = NULL;
Willy Tarreau174b06a2018-04-25 18:13:58 +02004206 unsigned int msgf;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004207 struct htx *htx = NULL;
Willy Tarreauea18f862018-12-22 20:19:26 +01004208 int flen; // header frame len
4209 int hole = 0;
Willy Tarreau86277d42019-01-02 15:36:11 +01004210 int ret = 0;
4211 int outlen;
Willy Tarreau13278b42017-10-13 19:23:14 +02004212 int wrap;
Willy Tarreau13278b42017-10-13 19:23:14 +02004213
Willy Tarreau7838a792019-08-12 18:42:03 +02004214 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
4215
Willy Tarreauea18f862018-12-22 20:19:26 +01004216next_frame:
4217 if (b_data(&h2c->dbuf) - hole < h2c->dfl)
4218 goto leave; // incomplete input frame
4219
4220 /* No END_HEADERS means there's one or more CONTINUATION frames. In
4221 * this case, we'll try to paste it immediately after the initial
4222 * HEADERS frame payload and kill any possible padding. The initial
4223 * frame's length will be increased to represent the concatenation
4224 * of the two frames. The next frame is read from position <tlen>
4225 * and written at position <flen> (minus padding if some is present).
4226 */
4227 if (unlikely(!(h2c->dff & H2_F_HEADERS_END_HEADERS))) {
4228 struct h2_fh hdr;
4229 int clen; // CONTINUATION frame's payload length
4230
Willy Tarreau7838a792019-08-12 18:42:03 +02004231 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 +01004232 if (!h2_peek_frame_hdr(&h2c->dbuf, h2c->dfl + hole, &hdr)) {
4233 /* no more data, the buffer may be full, either due to
4234 * too large a frame or because of too large a hole that
4235 * we're going to compact at the end.
4236 */
4237 goto leave;
4238 }
4239
4240 if (hdr.ft != H2_FT_CONTINUATION) {
4241 /* RFC7540#6.10: frame of unexpected type */
Willy Tarreau7838a792019-08-12 18:42:03 +02004242 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 +01004243 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
4244 goto fail;
4245 }
4246
4247 if (hdr.sid != h2c->dsi) {
4248 /* RFC7540#6.10: frame of different stream */
Willy Tarreau7838a792019-08-12 18:42:03 +02004249 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 +01004250 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
4251 goto fail;
4252 }
4253
4254 if ((unsigned)hdr.len > (unsigned)global.tune.bufsize) {
4255 /* RFC7540#4.2: invalid frame length */
Willy Tarreau7838a792019-08-12 18:42:03 +02004256 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 +01004257 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4258 goto fail;
4259 }
4260
4261 /* detect when we must stop aggragating frames */
4262 h2c->dff |= hdr.ff & H2_F_HEADERS_END_HEADERS;
4263
4264 /* Take as much as we can of the CONTINUATION frame's payload */
4265 clen = b_data(&h2c->dbuf) - (h2c->dfl + hole + 9);
4266 if (clen > hdr.len)
4267 clen = hdr.len;
4268
4269 /* Move the frame's payload over the padding, hole and frame
4270 * header. At least one of hole or dpl is null (see diagrams
4271 * above). The hole moves after the new aggragated frame.
4272 */
4273 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole + 9), clen, -(h2c->dpl + hole + 9));
4274 h2c->dfl += clen - h2c->dpl;
4275 hole += h2c->dpl + 9;
4276 h2c->dpl = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004277 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 +01004278 goto next_frame;
4279 }
4280
4281 flen = h2c->dfl - h2c->dpl;
Willy Tarreau68472622017-12-11 18:36:37 +01004282
Willy Tarreau13278b42017-10-13 19:23:14 +02004283 /* if the input buffer wraps, take a temporary copy of it (rare) */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004284 wrap = b_wrap(&h2c->dbuf) - b_head(&h2c->dbuf);
Willy Tarreau13278b42017-10-13 19:23:14 +02004285 if (wrap < h2c->dfl) {
Willy Tarreau68dd9852017-07-03 14:44:26 +02004286 copy = alloc_trash_chunk();
4287 if (!copy) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004288 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 +02004289 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
4290 goto fail;
4291 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004292 memcpy(copy->area, b_head(&h2c->dbuf), wrap);
4293 memcpy(copy->area + wrap, b_orig(&h2c->dbuf), h2c->dfl - wrap);
4294 hdrs = (uint8_t *) copy->area;
Willy Tarreau13278b42017-10-13 19:23:14 +02004295 }
4296
Willy Tarreau13278b42017-10-13 19:23:14 +02004297 /* Skip StreamDep and weight for now (we don't support PRIORITY) */
4298 if (h2c->dff & H2_F_HEADERS_PRIORITY) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004299 if (read_n32(hdrs) == h2c->dsi) {
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004300 /* RFC7540#5.3.1 : stream dep may not depend on itself */
Willy Tarreau7838a792019-08-12 18:42:03 +02004301 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 +01004302 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreaua0d11b62018-09-05 18:30:05 +02004303 goto fail;
Willy Tarreau18b86cd2017-12-03 19:24:50 +01004304 }
4305
Willy Tarreaua01f45e2018-12-31 07:41:24 +01004306 if (flen < 5) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004307 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 +01004308 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
4309 goto fail;
4310 }
4311
Willy Tarreau13278b42017-10-13 19:23:14 +02004312 hdrs += 5; // stream dep = 4, weight = 1
4313 flen -= 5;
4314 }
4315
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004316 if (!h2_get_buf(h2c, rxbuf)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004317 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 +01004318 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau86277d42019-01-02 15:36:11 +01004319 goto leave;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004320 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004321
Willy Tarreau937f7602018-02-26 15:22:17 +01004322 /* we can't retry a failed decompression operation so we must be very
4323 * careful not to take any risks. In practice the output buffer is
4324 * always empty except maybe for trailers, in which case we simply have
4325 * to wait for the upper layer to finish consuming what is available.
4326 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004327 htx = htx_from_buf(rxbuf);
4328 if (!htx_is_empty(htx)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004329 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 +02004330 h2c->flags |= H2_CF_DEM_SFULL;
4331 goto leave;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004332 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004333
Willy Tarreau25919232019-01-03 14:48:18 +01004334 /* past this point we cannot roll back in case of error */
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004335 outlen = hpack_decode_frame(h2c->ddht, hdrs, flen, list,
4336 sizeof(list)/sizeof(list[0]), tmp);
4337 if (outlen < 0) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004338 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 +01004339 h2c_error(h2c, H2_ERR_COMPRESSION_ERROR);
4340 goto fail;
4341 }
4342
Willy Tarreau25919232019-01-03 14:48:18 +01004343 /* The PACK decompressor was updated, let's update the input buffer and
4344 * the parser's state to commit these changes and allow us to later
4345 * fail solely on the stream if needed.
4346 */
4347 b_del(&h2c->dbuf, h2c->dfl + hole);
4348 h2c->dfl = hole = 0;
4349 h2c->st0 = H2_CS_FRAME_H;
4350
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004351 /* OK now we have our header list in <list> */
Willy Tarreau880f5802019-01-03 08:10:14 +01004352 msgf = (h2c->dff & H2_F_HEADERS_END_STREAM) ? 0 : H2_MSGF_BODY;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01004353
Willy Tarreau88d138e2019-01-02 19:38:14 +01004354 if (*flags & H2_SF_HEADERS_RCVD)
4355 goto trailers;
4356
4357 /* This is the first HEADERS frame so it's a headers block */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004358 if (h2c->flags & H2_CF_IS_BACK)
4359 outlen = h2_make_htx_response(list, htx, &msgf, body_len);
4360 else
4361 outlen = h2_make_htx_request(list, htx, &msgf, body_len);
Willy Tarreau59a10fb2017-11-21 20:03:02 +01004362
4363 if (outlen < 0) {
Willy Tarreau25919232019-01-03 14:48:18 +01004364 /* too large headers? this is a stream error only */
Willy Tarreau7838a792019-08-12 18:42:03 +02004365 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 +01004366 goto fail;
4367 }
Willy Tarreau13278b42017-10-13 19:23:14 +02004368
Willy Tarreau174b06a2018-04-25 18:13:58 +02004369 if (msgf & H2_MSGF_BODY) {
4370 /* a payload is present */
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004371 if (msgf & H2_MSGF_BODY_CL) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004372 *flags |= H2_SF_DATA_CLEN;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004373 htx->extra = *body_len;
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01004374 }
Willy Tarreau174b06a2018-04-25 18:13:58 +02004375 }
4376
Willy Tarreau88d138e2019-01-02 19:38:14 +01004377 done:
Christopher Faulet0b465482019-02-19 15:14:23 +01004378 /* indicate that a HEADERS frame was received for this stream, except
4379 * for 1xx responses. For 1xx responses, another HEADERS frame is
4380 * expected.
4381 */
4382 if (!(msgf & H2_MSGF_RSP_1XX))
4383 *flags |= H2_SF_HEADERS_RCVD;
Willy Tarreau6cc85a52019-01-02 15:49:20 +01004384
Christopher Fauletb75b5ea2019-05-17 08:37:28 +02004385 if ((h2c->dff & H2_F_HEADERS_END_STREAM)) {
Christopher Faulet9b79a102019-07-15 11:22:56 +02004386 /* Mark the end of message using EOM */
Willy Tarreau7838a792019-08-12 18:42:03 +02004387 if (!htx_add_endof(htx, HTX_BLK_EOM)) {
4388 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 +02004389 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004390 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01004391 }
Willy Tarreau937f7602018-02-26 15:22:17 +01004392
Willy Tarreau86277d42019-01-02 15:36:11 +01004393 /* success */
4394 ret = 1;
4395
Willy Tarreau68dd9852017-07-03 14:44:26 +02004396 leave:
Willy Tarreau86277d42019-01-02 15:36:11 +01004397 /* If there is a hole left and it's not at the end, we are forced to
Willy Tarreauea18f862018-12-22 20:19:26 +01004398 * move the remaining data over it.
4399 */
4400 if (hole) {
4401 if (b_data(&h2c->dbuf) > h2c->dfl + hole)
4402 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole),
4403 b_data(&h2c->dbuf) - (h2c->dfl + hole), -hole);
4404 b_sub(&h2c->dbuf, hole);
4405 }
4406
Willy Tarreau97215ca2019-04-29 10:20:21 +02004407 if (b_full(&h2c->dbuf) && h2c->dfl >= b_data(&h2c->dbuf)) {
Willy Tarreauea18f862018-12-22 20:19:26 +01004408 /* too large frames */
4409 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau86277d42019-01-02 15:36:11 +01004410 ret = -1;
Willy Tarreauea18f862018-12-22 20:19:26 +01004411 }
4412
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004413 if (htx)
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01004414 htx_to_buf(htx, rxbuf);
Willy Tarreau68dd9852017-07-03 14:44:26 +02004415 free_trash_chunk(copy);
Willy Tarreau7838a792019-08-12 18:42:03 +02004416 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn);
Willy Tarreau86277d42019-01-02 15:36:11 +01004417 return ret;
4418
Willy Tarreau68dd9852017-07-03 14:44:26 +02004419 fail:
Willy Tarreau86277d42019-01-02 15:36:11 +01004420 ret = -1;
Willy Tarreau68dd9852017-07-03 14:44:26 +02004421 goto leave;
Willy Tarreau88d138e2019-01-02 19:38:14 +01004422
4423 trailers:
4424 /* This is the last HEADERS frame hence a trailer */
Willy Tarreau88d138e2019-01-02 19:38:14 +01004425 if (!(h2c->dff & H2_F_HEADERS_END_STREAM)) {
4426 /* It's a trailer but it's missing ES flag */
Willy Tarreau7838a792019-08-12 18:42:03 +02004427 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 +01004428 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
4429 goto fail;
4430 }
4431
Christopher Faulet9b79a102019-07-15 11:22:56 +02004432 /* Trailers terminate a DATA sequence */
Willy Tarreau7838a792019-08-12 18:42:03 +02004433 if (h2_make_htx_trailers(list, htx) <= 0) {
4434 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 +02004435 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004436 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01004437 goto done;
Willy Tarreau13278b42017-10-13 19:23:14 +02004438}
4439
Christopher Faulet9b79a102019-07-15 11:22:56 +02004440/* Transfer the payload of a DATA frame to the HTTP/1 side. The HTTP/2 frame
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004441 * parser state is automatically updated. Returns > 0 if it could completely
4442 * send the current frame, 0 if it couldn't complete, in which case
4443 * CS_FL_RCV_MORE must be checked to know if some data remain pending (an empty
4444 * DATA frame can return 0 as a valid result). Stream errors are reported in
4445 * h2s->errcode and connection errors in h2c->errcode. The caller must already
4446 * have checked the frame header and ensured that the frame was complete or the
4447 * buffer full. It changes the frame state to FRAME_A once done.
Willy Tarreau454f9052017-10-26 19:40:35 +02004448 */
Willy Tarreau454b57b2018-02-26 15:50:05 +01004449static int h2_frt_transfer_data(struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02004450{
4451 struct h2c *h2c = h2s->h2c;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004452 int block;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004453 unsigned int flen = 0;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004454 struct htx *htx = NULL;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004455 struct buffer *csbuf;
Christopher Faulet9b79a102019-07-15 11:22:56 +02004456 unsigned int sent;
Willy Tarreau454f9052017-10-26 19:40:35 +02004457
Willy Tarreau7838a792019-08-12 18:42:03 +02004458 TRACE_ENTER(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
4459
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004460 h2c->flags &= ~H2_CF_DEM_SFULL;
Willy Tarreau454f9052017-10-26 19:40:35 +02004461
Olivier Houchard638b7992018-08-16 15:41:52 +02004462 csbuf = h2_get_buf(h2c, &h2s->rxbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004463 if (!csbuf) {
4464 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau7838a792019-08-12 18:42:03 +02004465 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 +01004466 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004467 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004468 htx = htx_from_buf(csbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01004469
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004470try_again:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004471 flen = h2c->dfl - h2c->dpl;
4472 if (!flen)
Willy Tarreau4a28da12018-01-04 14:41:00 +01004473 goto end_transfer;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004474
Willy Tarreauc9fa0482018-07-10 17:43:27 +02004475 if (flen > b_data(&h2c->dbuf)) {
4476 flen = b_data(&h2c->dbuf);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004477 if (!flen)
Willy Tarreau454b57b2018-02-26 15:50:05 +01004478 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01004479 }
4480
Christopher Faulet9b79a102019-07-15 11:22:56 +02004481 block = htx_free_data_space(htx);
4482 if (!block) {
4483 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004484 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 +02004485 goto fail;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004486 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02004487 if (flen > block)
4488 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004489
Christopher Faulet9b79a102019-07-15 11:22:56 +02004490 /* here, flen is the max we can copy into the output buffer */
4491 block = b_contig_data(&h2c->dbuf, 0);
4492 if (flen > block)
4493 flen = block;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004494
Christopher Faulet9b79a102019-07-15 11:22:56 +02004495 sent = htx_add_data(htx, ist2(b_head(&h2c->dbuf), flen));
Willy Tarreau7838a792019-08-12 18:42:03 +02004496 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 +02004497
Christopher Faulet9b79a102019-07-15 11:22:56 +02004498 b_del(&h2c->dbuf, sent);
4499 h2c->dfl -= sent;
4500 h2c->rcvd_c += sent;
4501 h2c->rcvd_s += sent; // warning, this can also affect the closed streams!
Willy Tarreau454f9052017-10-26 19:40:35 +02004502
Christopher Faulet9b79a102019-07-15 11:22:56 +02004503 if (h2s->flags & H2_SF_DATA_CLEN) {
4504 h2s->body_len -= sent;
4505 htx->extra = h2s->body_len;
Willy Tarreaueba10f22018-04-25 20:44:22 +02004506 }
4507
Christopher Faulet9b79a102019-07-15 11:22:56 +02004508 if (sent < flen) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01004509 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau7838a792019-08-12 18:42:03 +02004510 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 +01004511 goto fail;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004512 }
4513
Christopher Faulet9b79a102019-07-15 11:22:56 +02004514 goto try_again;
4515
Willy Tarreau4a28da12018-01-04 14:41:00 +01004516 end_transfer:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01004517 /* here we're done with the frame, all the payload (except padding) was
4518 * transferred.
4519 */
Willy Tarreaueba10f22018-04-25 20:44:22 +02004520
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004521 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Faulet9b79a102019-07-15 11:22:56 +02004522 if (!htx_add_endof(htx, HTX_BLK_EOM)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004523 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 +02004524 h2c->flags |= H2_CF_DEM_SFULL;
4525 goto fail;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01004526 }
Willy Tarreaueba10f22018-04-25 20:44:22 +02004527 }
4528
Willy Tarreaud1023bb2018-03-22 16:53:12 +01004529 h2c->rcvd_c += h2c->dpl;
4530 h2c->rcvd_s += h2c->dpl;
4531 h2c->dpl = 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02004532 h2c->st0 = H2_CS_FRAME_A; // send the corresponding window update
Christopher Faulet9b79a102019-07-15 11:22:56 +02004533 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 Tarreau61ea7dc2018-12-01 23:23:04 +01004535 return 1;
Willy Tarreau454b57b2018-02-26 15:50:05 +01004536 fail:
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004537 if (htx)
4538 htx_to_buf(htx, csbuf);
Willy Tarreau7838a792019-08-12 18:42:03 +02004539 TRACE_LEAVE(H2_EV_RX_FRAME|H2_EV_RX_DATA, h2c->conn, h2s);
Willy Tarreau454b57b2018-02-26 15:50:05 +01004540 return 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02004541}
4542
Willy Tarreau115e83b2018-12-01 19:17:53 +01004543/* Try to send a HEADERS frame matching HTX response present in HTX message
4544 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
4545 * must check the stream's status to detect any error which might have happened
4546 * subsequently to a successful send. The htx blocks are automatically removed
4547 * from the message. The htx message is assumed to be valid since produced from
4548 * the internal code, hence it contains a start line, an optional series of
4549 * header blocks and an end of header, otherwise an invalid frame could be
4550 * emitted and the resulting htx message could be left in an inconsistent state.
4551 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004552static size_t h2s_frt_make_resp_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau115e83b2018-12-01 19:17:53 +01004553{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004554 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau115e83b2018-12-01 19:17:53 +01004555 struct h2c *h2c = h2s->h2c;
4556 struct htx_blk *blk;
4557 struct htx_blk *blk_end;
4558 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02004559 struct buffer *mbuf;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004560 struct htx_sl *sl;
4561 enum htx_blk_type type;
4562 int es_now = 0;
4563 int ret = 0;
4564 int hdr;
4565 int idx;
4566
Willy Tarreau7838a792019-08-12 18:42:03 +02004567 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
4568
Willy Tarreau115e83b2018-12-01 19:17:53 +01004569 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004570 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004571 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02004572 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004573 return 0;
4574 }
4575
Willy Tarreau115e83b2018-12-01 19:17:53 +01004576 /* determine the first block which must not be deleted, blk_end may
4577 * be NULL if all blocks have to be deleted.
4578 */
4579 idx = htx_get_head(htx);
4580 blk_end = NULL;
4581 while (idx != -1) {
4582 type = htx_get_blk_type(htx_get_blk(htx, idx));
4583 idx = htx_get_next(htx, idx);
4584 if (type == HTX_BLK_EOH) {
4585 if (idx != -1)
4586 blk_end = htx_get_blk(htx, idx);
4587 break;
4588 }
4589 }
4590
4591 /* get the start line, we do have one */
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004592 blk = htx_get_head_blk(htx);
Christopher Fauletea009732019-11-18 15:50:25 +01004593 BUG_ON(!blk || htx_get_blk_type(blk) != HTX_BLK_RES_SL);
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004594 ALREADY_CHECKED(blk);
4595 sl = htx_get_blk_ptr(htx, blk);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004596 h2s->status = sl->info.res.status;
Willy Tarreau7838a792019-08-12 18:42:03 +02004597 if (h2s->status < 100 || h2s->status > 999) {
4598 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 +01004599 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004600 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01004601
4602 /* and the rest of the headers, that we dump starting at header 0 */
4603 hdr = 0;
4604
Willy Tarreau8e162ee2018-12-06 14:07:27 +01004605 idx = htx_get_head(htx); // returns the SL that we skip
Willy Tarreau115e83b2018-12-01 19:17:53 +01004606 while ((idx = htx_get_next(htx, idx)) != -1) {
4607 blk = htx_get_blk(htx, idx);
4608 type = htx_get_blk_type(blk);
4609
4610 if (type == HTX_BLK_UNUSED)
4611 continue;
4612
4613 if (type != HTX_BLK_HDR)
4614 break;
4615
Willy Tarreau7838a792019-08-12 18:42:03 +02004616 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
4617 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 +01004618 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004619 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01004620
4621 list[hdr].n = htx_get_blk_name(htx, blk);
4622 list[hdr].v = htx_get_blk_value(htx, blk);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004623 hdr++;
4624 }
4625
4626 /* marker for end of headers */
4627 list[hdr].n = ist("");
4628
4629 if (h2s->status == 204 || h2s->status == 304) {
4630 /* no contents, claim c-len is present and set to zero */
4631 es_now = 1;
4632 }
4633
Willy Tarreau9c218e72019-05-26 10:08:28 +02004634 mbuf = br_tail(h2c->mbuf);
4635 retry:
4636 if (!h2_get_buf(h2c, mbuf)) {
4637 h2c->flags |= H2_CF_MUX_MALLOC;
4638 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02004639 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 +02004640 return 0;
4641 }
4642
Willy Tarreau115e83b2018-12-01 19:17:53 +01004643 chunk_reset(&outbuf);
4644
4645 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004646 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
4647 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004648 break;
4649 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02004650 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau115e83b2018-12-01 19:17:53 +01004651 }
4652
4653 if (outbuf.size < 9)
4654 goto full;
4655
4656 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
4657 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
4658 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4659 outbuf.data = 9;
4660
4661 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01004662 if (!hpack_encode_int_status(&outbuf, h2s->status)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004663 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004664 goto realign_again;
4665 goto full;
4666 }
4667
4668 /* encode all headers, stop at empty name */
4669 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
4670 /* these ones do not exist in H2 and must be dropped. */
4671 if (isteq(list[hdr].n, ist("connection")) ||
4672 isteq(list[hdr].n, ist("proxy-connection")) ||
4673 isteq(list[hdr].n, ist("keep-alive")) ||
4674 isteq(list[hdr].n, ist("upgrade")) ||
4675 isteq(list[hdr].n, ist("transfer-encoding")))
4676 continue;
4677
Christopher Faulet86d144c2019-08-14 16:32:25 +02004678 /* Skip all pseudo-headers */
4679 if (*(list[hdr].n.ptr) == ':')
4680 continue;
4681
Willy Tarreau115e83b2018-12-01 19:17:53 +01004682 if (isteq(list[hdr].n, ist("")))
4683 break; // end
4684
4685 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
4686 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004687 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004688 goto realign_again;
4689 goto full;
4690 }
4691 }
4692
Willy Tarreaucb985a42019-10-07 16:56:34 +02004693 /* update the frame's size */
4694 h2_set_frame_size(outbuf.area, outbuf.data - 9);
4695
4696 if (outbuf.data > h2c->mfs + 9) {
4697 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
4698 /* output full */
4699 if (b_space_wraps(mbuf))
4700 goto realign_again;
4701 goto full;
4702 }
4703 }
4704
Christopher Faulet0b465482019-02-19 15:14:23 +01004705 /* we may need to add END_STREAM except for 1xx responses.
Willy Tarreau115e83b2018-12-01 19:17:53 +01004706 * FIXME: we should also set it when we know for sure that the
4707 * content-length is zero as well as on 204/304
4708 */
Christopher Faulet0b465482019-02-19 15:14:23 +01004709 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM &&
4710 (h2s->status >= 200 || h2s->status == 101))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004711 es_now = 1;
4712
Willy Tarreau927b88b2019-03-04 08:03:25 +01004713 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW)
Willy Tarreau115e83b2018-12-01 19:17:53 +01004714 es_now = 1;
4715
Willy Tarreau115e83b2018-12-01 19:17:53 +01004716 if (es_now)
4717 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
4718
4719 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02004720 TRACE_USER("sent H2 response", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
Willy Tarreaubcc45952019-05-26 10:05:50 +02004721 b_add(mbuf, outbuf.data);
Christopher Faulet0b465482019-02-19 15:14:23 +01004722
4723 /* indicates the HEADERS frame was sent, except for 1xx responses. For
4724 * 1xx responses, another HEADERS frame is expected.
4725 */
4726 if (h2s->status >= 200 || h2s->status == 101)
4727 h2s->flags |= H2_SF_HEADERS_SENT;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004728
Willy Tarreau115e83b2018-12-01 19:17:53 +01004729 if (es_now) {
4730 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02004731 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 +01004732 if (h2s->st == H2_SS_OPEN)
4733 h2s->st = H2_SS_HLOC;
4734 else
4735 h2s_close(h2s);
4736 }
4737
4738 /* OK we could properly deliver the response */
4739
4740 /* remove all header blocks including the EOH and compute the
4741 * corresponding size.
4742 *
4743 * FIXME: We should remove everything when es_now is set.
4744 */
4745 ret = 0;
4746 idx = htx_get_head(htx);
4747 blk = htx_get_blk(htx, idx);
4748 while (blk != blk_end) {
4749 ret += htx_get_blksz(blk);
4750 blk = htx_remove_blk(htx, blk);
4751 }
Willy Tarreauc5753ae2018-12-02 12:28:01 +01004752
Christopher Faulet316934d2019-05-15 14:22:48 +02004753 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
4754 ret += htx_get_blksz(blk_end);
Willy Tarreauc5753ae2018-12-02 12:28:01 +01004755 htx_remove_blk(htx, blk_end);
Christopher Faulet316934d2019-05-15 14:22:48 +02004756 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01004757 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02004758 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004759 return ret;
4760 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02004761 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
4762 goto retry;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004763 h2c->flags |= H2_CF_MUX_MFULL;
4764 h2s->flags |= H2_SF_BLK_MROOM;
4765 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02004766 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 +01004767 goto end;
4768 fail:
4769 /* unparsable HTX messages, too large ones to be produced in the local
4770 * list etc go here (unrecoverable errors).
4771 */
4772 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
4773 ret = 0;
4774 goto end;
4775}
4776
Willy Tarreau80739692018-10-05 11:35:57 +02004777/* Try to send a HEADERS frame matching HTX request present in HTX message
4778 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
4779 * must check the stream's status to detect any error which might have happened
4780 * subsequently to a successful send. The htx blocks are automatically removed
4781 * from the message. The htx message is assumed to be valid since produced from
4782 * the internal code, hence it contains a start line, an optional series of
4783 * header blocks and an end of header, otherwise an invalid frame could be
4784 * emitted and the resulting htx message could be left in an inconsistent state.
4785 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02004786static size_t h2s_bck_make_req_headers(struct h2s *h2s, struct htx *htx)
Willy Tarreau80739692018-10-05 11:35:57 +02004787{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02004788 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau80739692018-10-05 11:35:57 +02004789 struct h2c *h2c = h2s->h2c;
4790 struct htx_blk *blk;
4791 struct htx_blk *blk_end;
4792 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02004793 struct buffer *mbuf;
Willy Tarreau80739692018-10-05 11:35:57 +02004794 struct htx_sl *sl;
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004795 struct ist meth, uri, auth;
Willy Tarreau80739692018-10-05 11:35:57 +02004796 enum htx_blk_type type;
4797 int es_now = 0;
4798 int ret = 0;
4799 int hdr;
4800 int idx;
4801
Willy Tarreau7838a792019-08-12 18:42:03 +02004802 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
4803
Willy Tarreau80739692018-10-05 11:35:57 +02004804 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02004805 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02004806 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02004807 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau80739692018-10-05 11:35:57 +02004808 return 0;
4809 }
4810
Willy Tarreau80739692018-10-05 11:35:57 +02004811 /* determine the first block which must not be deleted, blk_end may
4812 * be NULL if all blocks have to be deleted.
4813 */
4814 idx = htx_get_head(htx);
4815 blk_end = NULL;
4816 while (idx != -1) {
4817 type = htx_get_blk_type(htx_get_blk(htx, idx));
4818 idx = htx_get_next(htx, idx);
4819 if (type == HTX_BLK_EOH) {
4820 if (idx != -1)
4821 blk_end = htx_get_blk(htx, idx);
4822 break;
4823 }
4824 }
4825
4826 /* get the start line, we do have one */
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004827 blk = htx_get_head_blk(htx);
Christopher Fauletea009732019-11-18 15:50:25 +01004828 BUG_ON(!blk || htx_get_blk_type(blk) != HTX_BLK_REQ_SL);
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004829 ALREADY_CHECKED(blk);
4830 sl = htx_get_blk_ptr(htx, blk);
Willy Tarreau80739692018-10-05 11:35:57 +02004831 meth = htx_sl_req_meth(sl);
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004832 uri = htx_sl_req_uri(sl);
4833 if (unlikely(uri.len == 0)) {
4834 TRACE_PROTO("no URI in HTX request", H2_EV_TX_FRAME|H2_EV_TX_HDR|H2_EV_H2S_ERR, h2c->conn, h2s);
4835 goto fail;
4836 }
Willy Tarreau80739692018-10-05 11:35:57 +02004837
4838 /* and the rest of the headers, that we dump starting at header 0 */
4839 hdr = 0;
4840
Willy Tarreau8e162ee2018-12-06 14:07:27 +01004841 idx = htx_get_head(htx); // returns the SL that we skip
Willy Tarreau80739692018-10-05 11:35:57 +02004842 while ((idx = htx_get_next(htx, idx)) != -1) {
4843 blk = htx_get_blk(htx, idx);
4844 type = htx_get_blk_type(blk);
4845
4846 if (type == HTX_BLK_UNUSED)
4847 continue;
4848
4849 if (type != HTX_BLK_HDR)
4850 break;
4851
Willy Tarreau7838a792019-08-12 18:42:03 +02004852 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
4853 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 +02004854 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02004855 }
Willy Tarreau80739692018-10-05 11:35:57 +02004856
4857 list[hdr].n = htx_get_blk_name(htx, blk);
4858 list[hdr].v = htx_get_blk_value(htx, blk);
Christopher Faulet67d58092019-10-02 10:51:38 +02004859
4860 /* Skip header if same name is used to add the server name */
4861 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name &&
4862 isteq(list[hdr].n, ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len)))
4863 continue;
4864
Willy Tarreau80739692018-10-05 11:35:57 +02004865 hdr++;
4866 }
4867
Christopher Faulet72ba6cd2019-09-24 16:20:05 +02004868 /* Now add the server name to a header (if requested) */
4869 if ((h2c->flags & H2_CF_IS_BACK) && h2c->proxy->server_id_hdr_name) {
4870 struct server *srv = objt_server(h2c->conn->target);
4871
4872 if (srv) {
4873 list[hdr].n = ist2(h2c->proxy->server_id_hdr_name, h2c->proxy->server_id_hdr_len);
4874 list[hdr].v = ist(srv->id);
4875 hdr++;
4876 }
4877 }
4878
Willy Tarreau80739692018-10-05 11:35:57 +02004879 /* marker for end of headers */
4880 list[hdr].n = ist("");
4881
Willy Tarreau9c218e72019-05-26 10:08:28 +02004882 mbuf = br_tail(h2c->mbuf);
4883 retry:
4884 if (!h2_get_buf(h2c, mbuf)) {
4885 h2c->flags |= H2_CF_MUX_MALLOC;
4886 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02004887 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 +02004888 return 0;
4889 }
4890
Willy Tarreau80739692018-10-05 11:35:57 +02004891 chunk_reset(&outbuf);
4892
4893 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004894 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
4895 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02004896 break;
4897 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02004898 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau80739692018-10-05 11:35:57 +02004899 }
4900
4901 if (outbuf.size < 9)
4902 goto full;
4903
4904 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
4905 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
4906 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4907 outbuf.data = 9;
4908
4909 /* encode the method, which necessarily is the first one */
Willy Tarreaubdabc3a2018-12-10 18:25:11 +01004910 if (!hpack_encode_method(&outbuf, sl->info.req.meth, meth)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004911 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02004912 goto realign_again;
4913 goto full;
4914 }
4915
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004916 auth = ist(NULL);
4917
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004918 /* RFC7540 #8.3: the CONNECT method must have :
4919 * - :authority set to the URI part (host:port)
4920 * - :method set to CONNECT
4921 * - :scheme and :path omitted
4922 */
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004923 if (unlikely(sl->info.req.meth == HTTP_METH_CONNECT)) {
4924 auth = uri;
4925
4926 if (!hpack_encode_header(&outbuf, ist(":authority"), auth)) {
4927 /* output full */
4928 if (b_space_wraps(mbuf))
4929 goto realign_again;
4930 goto full;
4931 }
4932 } else {
4933 /* other methods need a :scheme. If an authority is known from
4934 * the request line, it must be sent, otherwise only host is
4935 * sent. Host is never sent as the authority.
4936 */
4937 struct ist scheme = { };
Christopher Faulet3b44c542019-06-14 10:46:51 +02004938
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004939 if (uri.ptr[0] != '/' && uri.ptr[0] != '*') {
4940 /* the URI seems to start with a scheme */
4941 int len = 1;
4942
4943 while (len < uri.len && uri.ptr[len] != ':')
4944 len++;
4945
4946 if (len + 2 < uri.len && uri.ptr[len + 1] == '/' && uri.ptr[len + 2] == '/') {
4947 /* make the uri start at the authority now */
4948 scheme.ptr = uri.ptr;
4949 scheme.len = len,
4950 uri.ptr += len + 3;
4951 uri.len -= len + 3;
4952
4953 /* find the auth part of the URI */
4954 auth.ptr = uri.ptr;
4955 auth.len = 0;
4956 while (auth.len < uri.len && auth.ptr[auth.len] != '/')
4957 auth.len++;
4958
4959 uri.ptr += auth.len;
4960 uri.len -= auth.len;
4961 }
4962 }
4963
4964 if (!scheme.len) {
4965 /* no explicit scheme, we're using an origin-form URI,
4966 * probably from an H1 request transcoded to H2 via an
4967 * external layer, then received as H2 without authority.
4968 * So we have to look up the scheme from the HTX flags.
4969 * In such a case only http and https are possible, and
4970 * https is the default (sent by browsers).
4971 */
4972 if ((sl->flags & (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP)) == (HTX_SL_F_HAS_SCHM|HTX_SL_F_SCHM_HTTP))
4973 scheme = ist("http");
4974 else
4975 scheme = ist("https");
4976 }
Christopher Faulet3b44c542019-06-14 10:46:51 +02004977
4978 if (!hpack_encode_scheme(&outbuf, scheme)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004979 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004980 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004981 goto realign_again;
4982 goto full;
4983 }
Willy Tarreau80739692018-10-05 11:35:57 +02004984
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004985 if (auth.len && !hpack_encode_header(&outbuf, ist(":authority"), auth)) {
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004986 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004987 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004988 goto realign_again;
4989 goto full;
4990 }
Willy Tarreau053c1572019-02-01 16:13:59 +01004991
Willy Tarreaub8ce8902019-10-08 18:16:18 +02004992 /* encode the path. RFC7540#8.1.2.3: if path is empty it must
4993 * be sent as '/' or '*'.
4994 */
4995 if (unlikely(!uri.len)) {
4996 if (sl->info.req.meth == HTTP_METH_OPTIONS)
4997 uri = ist("*");
4998 else
4999 uri = ist("/");
Willy Tarreau053c1572019-02-01 16:13:59 +01005000 }
Willy Tarreau053c1572019-02-01 16:13:59 +01005001
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005002 if (!hpack_encode_path(&outbuf, uri)) {
5003 /* output full */
5004 if (b_space_wraps(mbuf))
5005 goto realign_again;
5006 goto full;
5007 }
Willy Tarreau80739692018-10-05 11:35:57 +02005008 }
5009
Willy Tarreaub8ce8902019-10-08 18:16:18 +02005010 /* encode all headers, stop at empty name. Host is only sent if we
5011 * do not provide an authority.
5012 */
Willy Tarreau80739692018-10-05 11:35:57 +02005013 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005014 struct ist n = list[hdr].n;
5015 struct ist v = list[hdr].v;
5016
Willy Tarreau80739692018-10-05 11:35:57 +02005017 /* these ones do not exist in H2 and must be dropped. */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005018 if (isteq(n, ist("connection")) ||
5019 (auth.len && isteq(n, ist("host"))) ||
5020 isteq(n, ist("proxy-connection")) ||
5021 isteq(n, ist("keep-alive")) ||
5022 isteq(n, ist("upgrade")) ||
5023 isteq(n, ist("transfer-encoding")))
Willy Tarreau80739692018-10-05 11:35:57 +02005024 continue;
5025
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005026 if (isteq(n, ist("te"))) {
5027 /* "te" may only be sent with "trailers" if this value
5028 * is present, otherwise it must be deleted.
5029 */
5030 v = istist(v, ist("trailers"));
5031 if (!v.ptr || (v.len > 8 && v.ptr[8] != ','))
5032 continue;
5033 v = ist("trailers");
5034 }
5035
Christopher Faulet86d144c2019-08-14 16:32:25 +02005036 /* Skip all pseudo-headers */
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005037 if (*(n.ptr) == ':')
Christopher Faulet86d144c2019-08-14 16:32:25 +02005038 continue;
5039
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005040 if (isteq(n, ist("")))
Willy Tarreau80739692018-10-05 11:35:57 +02005041 break; // end
5042
Willy Tarreaubb2c4ae2020-01-24 09:07:53 +01005043 if (!hpack_encode_header(&outbuf, n, v)) {
Willy Tarreau80739692018-10-05 11:35:57 +02005044 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005045 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02005046 goto realign_again;
5047 goto full;
5048 }
5049 }
5050
Willy Tarreaucb985a42019-10-07 16:56:34 +02005051 /* update the frame's size */
5052 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5053
5054 if (outbuf.data > h2c->mfs + 9) {
5055 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5056 /* output full */
5057 if (b_space_wraps(mbuf))
5058 goto realign_again;
5059 goto full;
5060 }
5061 }
5062
Willy Tarreau80739692018-10-05 11:35:57 +02005063 /* we may need to add END_STREAM if we have no body :
5064 * - request already closed, or :
5065 * - no transfer-encoding, and :
5066 * - no content-length or content-length:0
5067 * Fixme: this doesn't take into account CONNECT requests.
5068 */
5069 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM)
5070 es_now = 1;
5071
5072 if (sl->flags & HTX_SL_F_BODYLESS)
5073 es_now = 1;
5074
Willy Tarreau927b88b2019-03-04 08:03:25 +01005075 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW)
Willy Tarreau80739692018-10-05 11:35:57 +02005076 es_now = 1;
5077
Willy Tarreau80739692018-10-05 11:35:57 +02005078 if (es_now)
5079 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
5080
5081 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02005082 TRACE_USER("sent H2 request", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s, htx);
Willy Tarreaubcc45952019-05-26 10:05:50 +02005083 b_add(mbuf, outbuf.data);
Willy Tarreau80739692018-10-05 11:35:57 +02005084 h2s->flags |= H2_SF_HEADERS_SENT;
5085 h2s->st = H2_SS_OPEN;
5086
Willy Tarreau80739692018-10-05 11:35:57 +02005087 if (es_now) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005088 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 +02005089 // trim any possibly pending data (eg: inconsistent content-length)
5090 h2s->flags |= H2_SF_ES_SENT;
5091 h2s->st = H2_SS_HLOC;
5092 }
5093
5094 /* remove all header blocks including the EOH and compute the
5095 * corresponding size.
5096 *
5097 * FIXME: We should remove everything when es_now is set.
5098 */
5099 ret = 0;
5100 idx = htx_get_head(htx);
5101 blk = htx_get_blk(htx, idx);
5102 while (blk != blk_end) {
5103 ret += htx_get_blksz(blk);
5104 blk = htx_remove_blk(htx, blk);
5105 }
5106
Christopher Faulet316934d2019-05-15 14:22:48 +02005107 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
5108 ret += htx_get_blksz(blk_end);
Willy Tarreau80739692018-10-05 11:35:57 +02005109 htx_remove_blk(htx, blk_end);
Christopher Faulet316934d2019-05-15 14:22:48 +02005110 }
Willy Tarreau80739692018-10-05 11:35:57 +02005111
5112 end:
5113 return ret;
5114 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005115 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5116 goto retry;
Willy Tarreau80739692018-10-05 11:35:57 +02005117 h2c->flags |= H2_CF_MUX_MFULL;
5118 h2s->flags |= H2_SF_BLK_MROOM;
5119 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005120 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 +02005121 goto end;
5122 fail:
5123 /* unparsable HTX messages, too large ones to be produced in the local
5124 * list etc go here (unrecoverable errors).
5125 */
5126 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5127 ret = 0;
5128 goto end;
5129}
5130
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005131/* Try to send a DATA frame matching HTTP response present in HTX structure
Willy Tarreau98de12a2018-12-12 07:03:00 +01005132 * present in <buf>, for stream <h2s>. Returns the number of bytes sent. The
5133 * caller must check the stream's status to detect any error which might have
5134 * happened subsequently to a successful send. Returns the number of data bytes
Christopher Faulet54b5e212019-06-04 10:08:28 +02005135 * consumed, or zero if nothing done. Note that EOM count for 1 byte.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005136 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005137static size_t h2s_frt_make_resp_data(struct h2s *h2s, struct buffer *buf, size_t count)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005138{
5139 struct h2c *h2c = h2s->h2c;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005140 struct htx *htx;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005141 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005142 struct buffer *mbuf;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005143 size_t total = 0;
5144 int es_now = 0;
5145 int bsize; /* htx block size */
5146 int fsize; /* h2 frame size */
5147 struct htx_blk *blk;
5148 enum htx_blk_type type;
5149 int idx;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005150 int trunc_out; /* non-zero if truncated on out buf */
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005151
Willy Tarreau7838a792019-08-12 18:42:03 +02005152 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
5153
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005154 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005155 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005156 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005157 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005158 goto end;
5159 }
5160
Willy Tarreau98de12a2018-12-12 07:03:00 +01005161 htx = htx_from_buf(buf);
5162
Christopher Faulet54b5e212019-06-04 10:08:28 +02005163 /* We only come here with HTX_BLK_DATA blocks. However, while looping,
5164 * we can meet an HTX_BLK_EOM block that we'll leave to the caller to
5165 * handle.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005166 */
5167
5168 new_frame:
Willy Tarreauee573762018-12-04 15:25:57 +01005169 if (!count || htx_is_empty(htx))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005170 goto end;
5171
5172 idx = htx_get_head(htx);
5173 blk = htx_get_blk(htx, idx);
Christopher Faulet54b5e212019-06-04 10:08:28 +02005174 type = htx_get_blk_type(blk); // DATA or EOM
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005175 bsize = htx_get_blksz(blk);
5176 fsize = bsize;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005177 trunc_out = 0;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005178
Christopher Faulet54b5e212019-06-04 10:08:28 +02005179 if (type == HTX_BLK_EOM) {
Willy Tarreau7eeb10a2019-01-04 09:28:17 +01005180 if (h2s->flags & H2_SF_ES_SENT) {
5181 /* ES already sent */
5182 htx_remove_blk(htx, blk);
5183 total++; // EOM counts as one byte
5184 count--;
5185 goto end;
5186 }
5187 }
5188 else if (type != HTX_BLK_DATA)
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005189 goto end;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005190
Willy Tarreau9c218e72019-05-26 10:08:28 +02005191 mbuf = br_tail(h2c->mbuf);
5192 retry:
5193 if (!h2_get_buf(h2c, mbuf)) {
5194 h2c->flags |= H2_CF_MUX_MALLOC;
5195 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005196 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 +02005197 goto end;
5198 }
5199
Willy Tarreau98de12a2018-12-12 07:03:00 +01005200 /* Perform some optimizations to reduce the number of buffer copies.
5201 * First, if the mux's buffer is empty and the htx area contains
5202 * exactly one data block of the same size as the requested count, and
5203 * this count fits within the frame size, the stream's window size, and
5204 * the connection's window size, then it's possible to simply swap the
5205 * caller's buffer with the mux's output buffer and adjust offsets and
5206 * length to match the entire DATA HTX block in the middle. In this
5207 * case we perform a true zero-copy operation from end-to-end. This is
5208 * the situation that happens all the time with large files. Second, if
5209 * this is not possible, but the mux's output buffer is empty, we still
5210 * have an opportunity to avoid the copy to the intermediary buffer, by
5211 * making the intermediary buffer's area point to the output buffer's
5212 * area. In this case we want to skip the HTX header to make sure that
5213 * copies remain aligned and that this operation remains possible all
5214 * the time. This goes for headers, data blocks and any data extracted
5215 * from the HTX blocks.
5216 */
5217 if (unlikely(fsize == count &&
Christopher Faulet192c6a22019-06-11 16:32:24 +02005218 htx_nbblks(htx) == 1 && type == HTX_BLK_DATA &&
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005219 fsize <= h2s_mws(h2s) && fsize <= h2c->mws && fsize <= h2c->mfs)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005220 void *old_area = mbuf->area;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005221
Willy Tarreaubcc45952019-05-26 10:05:50 +02005222 if (b_data(mbuf)) {
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005223 /* Too bad there are data left there. We're willing to memcpy/memmove
5224 * up to 1/4 of the buffer, which means that it's OK to copy a large
5225 * frame into a buffer containing few data if it needs to be realigned,
5226 * and that it's also OK to copy few data without realigning. Otherwise
5227 * we'll pretend the mbuf is full and wait for it to become empty.
Willy Tarreau98de12a2018-12-12 07:03:00 +01005228 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005229 if (fsize + 9 <= b_room(mbuf) &&
5230 (b_data(mbuf) <= b_size(mbuf) / 4 ||
Willy Tarreau7838a792019-08-12 18:42:03 +02005231 (fsize <= b_size(mbuf) / 4 && fsize + 9 <= b_contig_space(mbuf)))) {
5232 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 +01005233 goto copy;
Willy Tarreau7838a792019-08-12 18:42:03 +02005234 }
Willy Tarreau8ab128c2019-03-21 17:47:28 +01005235
Willy Tarreau9c218e72019-05-26 10:08:28 +02005236 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5237 goto retry;
5238
Willy Tarreau98de12a2018-12-12 07:03:00 +01005239 h2c->flags |= H2_CF_MUX_MFULL;
5240 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005241 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 +01005242 goto end;
5243 }
5244
5245 /* map an H2 frame to the HTX block so that we can put the
5246 * frame header there.
5247 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005248 *mbuf = b_make(buf->area, buf->size, sizeof(struct htx) + blk->addr - 9, fsize + 9);
5249 outbuf.area = b_head(mbuf);
Willy Tarreau98de12a2018-12-12 07:03:00 +01005250
5251 /* prepend an H2 DATA frame header just before the DATA block */
5252 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5253 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5254 h2_set_frame_size(outbuf.area, fsize);
5255
5256 /* update windows */
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005257 h2s->sws -= fsize;
Willy Tarreau98de12a2018-12-12 07:03:00 +01005258 h2c->mws -= fsize;
5259
5260 /* and exchange with our old area */
5261 buf->area = old_area;
5262 buf->data = buf->head = 0;
5263 total += fsize;
Willy Tarreau7838a792019-08-12 18:42:03 +02005264
5265 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 +01005266 goto end;
5267 }
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01005268
Willy Tarreau98de12a2018-12-12 07:03:00 +01005269 copy:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005270 /* for DATA and EOM we'll have to emit a frame, even if empty */
5271
5272 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005273 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5274 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005275 break;
5276 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005277 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005278 }
5279
5280 if (outbuf.size < 9) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02005281 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5282 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005283 h2c->flags |= H2_CF_MUX_MFULL;
5284 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005285 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005286 goto end;
5287 }
5288
5289 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
5290 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
5291 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5292 outbuf.data = 9;
5293
5294 /* we have in <fsize> the exact number of bytes we need to copy from
5295 * the HTX buffer. We need to check this against the connection's and
5296 * the stream's send windows, and to ensure that this fits in the max
5297 * frame size and in the buffer's available space minus 9 bytes (for
5298 * the frame header). The connection's flow control is applied last so
5299 * that we can use a separate list of streams which are immediately
5300 * unblocked on window opening. Note: we don't implement padding.
5301 */
5302
5303 /* EOM is presented with bsize==1 but would lead to the emission of an
5304 * empty frame, thus we force it to zero here.
5305 */
5306 if (type == HTX_BLK_EOM)
5307 bsize = fsize = 0;
5308
5309 if (!fsize)
5310 goto send_empty;
5311
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005312 if (h2s_mws(h2s) <= 0) {
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005313 h2s->flags |= H2_SF_BLK_SFCTL;
Willy Tarreauc234ae32019-05-13 17:56:11 +02005314 if (LIST_ADDED(&h2s->list))
Olivier Houchardbfe2a832019-05-10 14:02:21 +02005315 LIST_DEL_INIT(&h2s->list);
Willy Tarreau9edf6db2019-10-02 10:49:59 +02005316 LIST_ADDQ(&h2c->blocked_list, &h2s->list);
Willy Tarreau7838a792019-08-12 18:42:03 +02005317 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 +01005318 goto end;
5319 }
5320
Willy Tarreauee573762018-12-04 15:25:57 +01005321 if (fsize > count)
5322 fsize = count;
5323
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005324 if (fsize > h2s_mws(h2s))
5325 fsize = h2s_mws(h2s); // >0
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005326
5327 if (h2c->mfs && fsize > h2c->mfs)
5328 fsize = h2c->mfs; // >0
5329
5330 if (fsize + 9 > outbuf.size) {
Willy Tarreau455d5682019-05-24 19:42:18 +02005331 /* It doesn't fit at once. If it at least fits once split and
5332 * the amount of data to move is low, let's defragment the
5333 * buffer now.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005334 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005335 if (b_space_wraps(mbuf) &&
5336 (fsize + 9 <= b_room(mbuf)) &&
5337 b_data(mbuf) <= MAX_DATA_REALIGN)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005338 goto realign_again;
5339 fsize = outbuf.size - 9;
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005340 trunc_out = 1;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005341
5342 if (fsize <= 0) {
5343 /* no need to send an empty frame here */
Willy Tarreau9c218e72019-05-26 10:08:28 +02005344 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5345 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005346 h2c->flags |= H2_CF_MUX_MFULL;
5347 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005348 TRACE_STATE("output buffer full", H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005349 goto end;
5350 }
5351 }
5352
5353 if (h2c->mws <= 0) {
5354 h2s->flags |= H2_SF_BLK_MFCTL;
Willy Tarreau7838a792019-08-12 18:42:03 +02005355 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 +01005356 goto end;
5357 }
5358
5359 if (fsize > h2c->mws)
5360 fsize = h2c->mws;
5361
5362 /* now let's copy this this into the output buffer */
5363 memcpy(outbuf.area + 9, htx_get_blk_ptr(htx, blk), fsize);
Willy Tarreau1d4a0f82019-08-02 07:52:08 +02005364 h2s->sws -= fsize;
Willy Tarreau0f799ca2018-12-04 15:20:11 +01005365 h2c->mws -= fsize;
Willy Tarreauee573762018-12-04 15:25:57 +01005366 count -= fsize;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005367
5368 send_empty:
5369 /* update the frame's size */
5370 h2_set_frame_size(outbuf.area, fsize);
5371
5372 /* FIXME: for now we only set the ES flag on empty DATA frames, once
5373 * meeting EOM. We should optimize this later.
5374 */
5375 if (type == HTX_BLK_EOM) {
Willy Tarreauee573762018-12-04 15:25:57 +01005376 total++; // EOM counts as one byte
5377 count--;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005378 es_now = 1;
5379 }
5380
5381 if (es_now)
5382 outbuf.area[4] |= H2_F_DATA_END_STREAM;
5383
5384 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005385 b_add(mbuf, fsize + 9);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005386
5387 /* consume incoming HTX block, including EOM */
5388 total += fsize;
5389 if (fsize == bsize) {
5390 htx_remove_blk(htx, blk);
Willy Tarreau7838a792019-08-12 18:42:03 +02005391 if (fsize) {
5392 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 +01005393 goto new_frame;
Willy Tarreau7838a792019-08-12 18:42:03 +02005394 }
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005395 } else {
5396 /* we've truncated this block */
5397 htx_cut_data_blk(htx, blk, fsize);
Willy Tarreauc7ce4e32020-01-14 11:42:59 +01005398 if (trunc_out)
5399 goto new_frame;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005400 }
5401
5402 if (es_now) {
5403 if (h2s->st == H2_SS_OPEN)
5404 h2s->st = H2_SS_HLOC;
5405 else
5406 h2s_close(h2s);
5407
5408 h2s->flags |= H2_SF_ES_SENT;
Willy Tarreau7838a792019-08-12 18:42:03 +02005409 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 +01005410 }
5411
5412 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005413 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_DATA, h2c->conn, h2s);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005414 return total;
5415}
5416
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005417/* Try to send a HEADERS frame matching HTX_BLK_TLR series of blocks present in
5418 * HTX message <htx> for the H2 stream <h2s>. Returns the number of bytes
5419 * processed. The caller must check the stream's status to detect any error
5420 * which might have happened subsequently to a successful send. The htx blocks
5421 * are automatically removed from the message. The htx message is assumed to be
5422 * valid since produced from the internal code. Processing stops when meeting
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005423 * the EOM, which is *not* removed. All trailers are processed at once and sent
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005424 * as a single frame. The ES flag is always set.
5425 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005426static size_t h2s_make_trailers(struct h2s *h2s, struct htx *htx)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005427{
Christopher Faulete4ab11b2019-06-11 15:05:37 +02005428 struct http_hdr list[global.tune.max_http_hdr];
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005429 struct h2c *h2c = h2s->h2c;
5430 struct htx_blk *blk;
5431 struct htx_blk *blk_end;
5432 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005433 struct buffer *mbuf;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005434 enum htx_blk_type type;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005435 int ret = 0;
5436 int hdr;
5437 int idx;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005438
Willy Tarreau7838a792019-08-12 18:42:03 +02005439 TRACE_ENTER(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
5440
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005441 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005442 TRACE_STATE("mux output busy", H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005443 h2s->flags |= H2_SF_BLK_MBUSY;
Willy Tarreau7838a792019-08-12 18:42:03 +02005444 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005445 goto end;
5446 }
5447
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005448 /* determine the first block which must not be deleted, blk_end may
5449 * be NULL if all blocks have to be deleted. also get trailers.
5450 */
5451 idx = htx_get_head(htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005452 blk_end = NULL;
5453
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005454 hdr = 0;
5455 while (idx != -1) {
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005456 blk = htx_get_blk(htx, idx);
5457 type = htx_get_blk_type(blk);
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005458 idx = htx_get_next(htx, idx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005459 if (type == HTX_BLK_UNUSED)
5460 continue;
5461
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005462 if (type == HTX_BLK_EOT) {
5463 if (idx != -1)
5464 blk_end = blk;
5465 break;
5466 }
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005467 if (type != HTX_BLK_TLR)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005468 break;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005469
Willy Tarreau7838a792019-08-12 18:42:03 +02005470 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1)) {
5471 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 +01005472 goto fail;
Willy Tarreau7838a792019-08-12 18:42:03 +02005473 }
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005474
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005475 list[hdr].n = htx_get_blk_name(htx, blk);
5476 list[hdr].v = htx_get_blk_value(htx, blk);
5477 hdr++;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005478 }
5479
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005480 /* marker for end of trailers */
5481 list[hdr].n = ist("");
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005482
Willy Tarreau9c218e72019-05-26 10:08:28 +02005483 mbuf = br_tail(h2c->mbuf);
5484 retry:
5485 if (!h2_get_buf(h2c, mbuf)) {
5486 h2c->flags |= H2_CF_MUX_MALLOC;
5487 h2s->flags |= H2_SF_BLK_MROOM;
Willy Tarreau7838a792019-08-12 18:42:03 +02005488 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 +02005489 goto end;
5490 }
5491
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005492 chunk_reset(&outbuf);
5493
5494 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005495 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5496 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005497 break;
5498 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005499 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005500 }
5501
5502 if (outbuf.size < 9)
5503 goto full;
5504
5505 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4,ES=1 */
5506 memcpy(outbuf.area, "\x00\x00\x00\x01\x05", 5);
5507 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5508 outbuf.data = 9;
5509
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005510 /* encode all headers */
5511 for (idx = 0; idx < hdr; idx++) {
5512 /* these ones do not exist in H2 or must not appear in
5513 * trailers and must be dropped.
5514 */
5515 if (isteq(list[idx].n, ist("host")) ||
5516 isteq(list[idx].n, ist("content-length")) ||
5517 isteq(list[idx].n, ist("connection")) ||
5518 isteq(list[idx].n, ist("proxy-connection")) ||
5519 isteq(list[idx].n, ist("keep-alive")) ||
5520 isteq(list[idx].n, ist("upgrade")) ||
5521 isteq(list[idx].n, ist("te")) ||
5522 isteq(list[idx].n, ist("transfer-encoding")))
5523 continue;
5524
Christopher Faulet86d144c2019-08-14 16:32:25 +02005525 /* Skip all pseudo-headers */
5526 if (*(list[idx].n.ptr) == ':')
5527 continue;
5528
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005529 if (!hpack_encode_header(&outbuf, list[idx].n, list[idx].v)) {
5530 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005531 if (b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005532 goto realign_again;
5533 goto full;
5534 }
5535 }
5536
Willy Tarreau5121e5d2019-05-06 15:13:41 +02005537 if (outbuf.data == 9) {
5538 /* here we have a problem, we have nothing to emit (either we
5539 * received an empty trailers block followed or we removed its
5540 * contents above). Because of this we can't send a HEADERS
5541 * frame, so we have to cheat and instead send an empty DATA
5542 * frame conveying the ES flag.
Willy Tarreau67b8cae2019-02-21 18:16:35 +01005543 */
5544 outbuf.area[3] = H2_FT_DATA;
5545 outbuf.area[4] = H2_F_DATA_END_STREAM;
5546 }
5547
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005548 /* update the frame's size */
5549 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5550
Willy Tarreau572d9f52019-10-11 16:58:37 +02005551 if (outbuf.data > h2c->mfs + 9) {
5552 if (!h2_fragment_headers(&outbuf, h2c->mfs)) {
5553 /* output full */
5554 if (b_space_wraps(mbuf))
5555 goto realign_again;
5556 goto full;
5557 }
5558 }
5559
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005560 /* commit the H2 response */
Willy Tarreau7838a792019-08-12 18:42:03 +02005561 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 +02005562 b_add(mbuf, outbuf.data);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005563 h2s->flags |= H2_SF_ES_SENT;
5564
5565 if (h2s->st == H2_SS_OPEN)
5566 h2s->st = H2_SS_HLOC;
5567 else
5568 h2s_close(h2s);
5569
5570 /* OK we could properly deliver the response */
5571 done:
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005572 /* remove all header blocks till the end and compute the corresponding size. */
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005573 ret = 0;
5574 idx = htx_get_head(htx);
5575 blk = htx_get_blk(htx, idx);
5576 while (blk != blk_end) {
5577 ret += htx_get_blksz(blk);
5578 blk = htx_remove_blk(htx, blk);
5579 }
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005580
5581 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
5582 ret += htx_get_blksz(blk_end);
5583 htx_remove_blk(htx, blk_end);
5584 }
5585
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005586 end:
Willy Tarreau7838a792019-08-12 18:42:03 +02005587 TRACE_LEAVE(H2_EV_TX_FRAME|H2_EV_TX_HDR, h2c->conn, h2s);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005588 return ret;
5589 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005590 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5591 goto retry;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005592 h2c->flags |= H2_CF_MUX_MFULL;
5593 h2s->flags |= H2_SF_BLK_MROOM;
5594 ret = 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005595 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 +01005596 goto end;
5597 fail:
5598 /* unparsable HTX messages, too large ones to be produced in the local
5599 * list etc go here (unrecoverable errors).
5600 */
5601 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5602 ret = 0;
5603 goto end;
5604}
5605
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01005606/* Called from the upper layer, to subscribe <es> to events <event_type>. The
5607 * event subscriber <es> is not allowed to change from a previous call as long
5608 * as at least one event is still subscribed. The <event_type> must only be a
5609 * combination of SUB_RETRY_RECV and SUB_RETRY_SEND. It always returns 0.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005610 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01005611static int h2_subscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard6ff20392018-07-17 18:46:31 +02005612{
Olivier Houchard6ff20392018-07-17 18:46:31 +02005613 struct h2s *h2s = cs->ctx;
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02005614 struct h2c *h2c = h2s->h2c;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005615
Willy Tarreau7838a792019-08-12 18:42:03 +02005616 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01005617
5618 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
5619 BUG_ON(h2s->subs && h2s->subs->events & event_type);
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01005620 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01005621
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01005622 es->events |= event_type;
5623 h2s->subs = es;
Willy Tarreauf96508a2020-01-10 11:12:48 +01005624
5625 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02005626 TRACE_DEVEL("subscribe(recv)", H2_EV_STRM_RECV, h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01005627
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005628 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005629 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2c->conn, h2s);
Olivier Houchardf8338152019-05-14 17:50:32 +02005630 if (!(h2s->flags & H2_SF_BLK_SFCTL) &&
5631 !LIST_ADDED(&h2s->list)) {
5632 if (h2s->flags & H2_SF_BLK_MFCTL)
5633 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
5634 else
5635 LIST_ADDQ(&h2c->send_list, &h2s->list);
Olivier Houcharde1c6dbc2018-08-01 17:06:43 +02005636 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02005637 }
Willy Tarreau7838a792019-08-12 18:42:03 +02005638 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005639 return 0;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005640}
5641
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01005642/* Called from the upper layer, to unsubscribe <es> from events <event_type>.
5643 * The <es> pointer is not allowed to differ from the one passed to the
5644 * subscribe() call. It always returns zero.
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005645 */
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01005646static int h2_unsubscribe(struct conn_stream *cs, int event_type, struct wait_event *es)
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005647{
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005648 struct h2s *h2s = cs->ctx;
5649
Willy Tarreau7838a792019-08-12 18:42:03 +02005650 TRACE_ENTER(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreauf96508a2020-01-10 11:12:48 +01005651
5652 BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01005653 BUG_ON(h2s->subs && h2s->subs != es);
Willy Tarreauf96508a2020-01-10 11:12:48 +01005654
Willy Tarreauee1a6fc2020-01-17 07:52:13 +01005655 es->events &= ~event_type;
5656 if (!es->events)
Willy Tarreauf96508a2020-01-10 11:12:48 +01005657 h2s->subs = NULL;
5658
5659 if (event_type & SUB_RETRY_RECV)
Willy Tarreau7838a792019-08-12 18:42:03 +02005660 TRACE_DEVEL("unsubscribe(recv)", H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01005661
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005662 if (event_type & SUB_RETRY_SEND) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005663 TRACE_DEVEL("subscribe(send)", H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreaud9464162020-01-10 18:25:07 +01005664 h2s->flags &= ~H2_SF_NOTIFIED;
Willy Tarreauf96508a2020-01-10 11:12:48 +01005665 if (!(h2s->flags & (H2_SF_WANT_SHUTR | H2_SF_WANT_SHUTW)))
5666 LIST_DEL_INIT(&h2s->list);
Olivier Houchardd846c262018-10-19 17:24:29 +02005667 }
Willy Tarreauf96508a2020-01-10 11:12:48 +01005668
Willy Tarreau7838a792019-08-12 18:42:03 +02005669 TRACE_LEAVE(H2_EV_STRM_SEND|H2_EV_STRM_RECV, h2s->h2c->conn, h2s);
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005670 return 0;
5671}
5672
5673
Olivier Houchard511efea2018-08-16 15:30:32 +02005674/* Called from the upper layer, to receive data */
5675static size_t h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
5676{
Olivier Houchard638b7992018-08-16 15:41:52 +02005677 struct h2s *h2s = cs->ctx;
Willy Tarreau082f5592018-11-25 08:03:32 +01005678 struct h2c *h2c = h2s->h2c;
Willy Tarreau86724e22018-12-01 23:19:43 +01005679 struct htx *h2s_htx = NULL;
5680 struct htx *buf_htx = NULL;
Olivier Houchard511efea2018-08-16 15:30:32 +02005681 size_t ret = 0;
5682
Willy Tarreau7838a792019-08-12 18:42:03 +02005683 TRACE_ENTER(H2_EV_STRM_RECV, h2c->conn, h2s);
5684
Olivier Houchard511efea2018-08-16 15:30:32 +02005685 /* transfer possibly pending data to the upper layer */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005686 h2s_htx = htx_from_buf(&h2s->rxbuf);
5687 if (htx_is_empty(h2s_htx)) {
5688 /* Here htx_to_buf() will set buffer data to 0 because
5689 * the HTX is empty.
5690 */
5691 htx_to_buf(h2s_htx, &h2s->rxbuf);
5692 goto end;
5693 }
Willy Tarreau7196dd62019-03-05 10:51:11 +01005694
Christopher Faulet9b79a102019-07-15 11:22:56 +02005695 ret = h2s_htx->data;
5696 buf_htx = htx_from_buf(buf);
Willy Tarreau7196dd62019-03-05 10:51:11 +01005697
Christopher Faulet9b79a102019-07-15 11:22:56 +02005698 /* <buf> is empty and the message is small enough, swap the
5699 * buffers. */
5700 if (htx_is_empty(buf_htx) && htx_used_space(h2s_htx) <= count) {
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005701 htx_to_buf(buf_htx, buf);
5702 htx_to_buf(h2s_htx, &h2s->rxbuf);
Christopher Faulet9b79a102019-07-15 11:22:56 +02005703 b_xfer(buf, &h2s->rxbuf, b_data(&h2s->rxbuf));
5704 goto end;
Willy Tarreau86724e22018-12-01 23:19:43 +01005705 }
Christopher Faulet9b79a102019-07-15 11:22:56 +02005706
5707 htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_EOM);
5708
5709 if (h2s_htx->flags & HTX_FL_PARSING_ERROR) {
5710 buf_htx->flags |= HTX_FL_PARSING_ERROR;
5711 if (htx_is_empty(buf_htx))
5712 cs->flags |= CS_FL_EOI;
Willy Tarreau86724e22018-12-01 23:19:43 +01005713 }
Olivier Houchard511efea2018-08-16 15:30:32 +02005714
Christopher Faulet9b79a102019-07-15 11:22:56 +02005715 buf_htx->extra = (h2s_htx->extra ? (h2s_htx->data + h2s_htx->extra) : 0);
5716 htx_to_buf(buf_htx, buf);
5717 htx_to_buf(h2s_htx, &h2s->rxbuf);
5718 ret -= h2s_htx->data;
5719
Christopher Faulet37070b22019-02-14 15:12:14 +01005720 end:
Olivier Houchard638b7992018-08-16 15:41:52 +02005721 if (b_data(&h2s->rxbuf))
Olivier Houchardd247be02018-12-06 16:22:29 +01005722 cs->flags |= (CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02005723 else {
Olivier Houchardd247be02018-12-06 16:22:29 +01005724 cs->flags &= ~(CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Christopher Fauletfa922f02019-05-07 10:55:17 +02005725 if (h2s->flags & H2_SF_ES_RCVD)
5726 cs->flags |= CS_FL_EOI;
Willy Tarreau76c83822019-06-15 09:55:50 +02005727 if (conn_xprt_read0_pending(h2c->conn) || h2s->st == H2_SS_CLOSED)
Olivier Houchard511efea2018-08-16 15:30:32 +02005728 cs->flags |= CS_FL_EOS;
Olivier Houchard71748cb2018-12-17 14:16:46 +01005729 if (cs->flags & CS_FL_ERR_PENDING)
5730 cs->flags |= CS_FL_ERROR;
Olivier Houchard638b7992018-08-16 15:41:52 +02005731 if (b_size(&h2s->rxbuf)) {
5732 b_free(&h2s->rxbuf);
5733 offer_buffers(NULL, tasks_run_queue);
5734 }
Olivier Houchard511efea2018-08-16 15:30:32 +02005735 }
5736
Willy Tarreau082f5592018-11-25 08:03:32 +01005737 if (ret && h2c->dsi == h2s->id) {
5738 /* demux is blocking on this stream's buffer */
5739 h2c->flags &= ~H2_CF_DEM_SFULL;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02005740 h2c_restart_reading(h2c, 1);
Willy Tarreau082f5592018-11-25 08:03:32 +01005741 }
Christopher Faulet37070b22019-02-14 15:12:14 +01005742
Willy Tarreau7838a792019-08-12 18:42:03 +02005743 TRACE_LEAVE(H2_EV_STRM_RECV, h2c->conn, h2s);
Olivier Houchard511efea2018-08-16 15:30:32 +02005744 return ret;
5745}
5746
Olivier Houchardd846c262018-10-19 17:24:29 +02005747
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005748/* Called from the upper layer, to send data from buffer <buf> for no more than
5749 * <count> bytes. Returns the number of bytes effectively sent. Some status
5750 * flags may be updated on the conn_stream.
5751 */
Christopher Fauletd44a9b32018-07-27 11:59:41 +02005752static size_t h2_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
Willy Tarreau62f52692017-10-08 23:01:42 +02005753{
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005754 struct h2s *h2s = cs->ctx;
Willy Tarreau1dc41e72018-06-14 13:21:28 +02005755 size_t total = 0;
Willy Tarreau5dd17352018-06-14 13:33:30 +02005756 size_t ret;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005757 struct htx *htx;
5758 struct htx_blk *blk;
5759 enum htx_blk_type btype;
5760 uint32_t bsize;
5761 int32_t idx;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005762
Willy Tarreau7838a792019-08-12 18:42:03 +02005763 TRACE_ENTER(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
5764
Olivier Houchardd360ac62019-03-22 17:37:16 +01005765 /* If we were not just woken because we wanted to send but couldn't,
5766 * and there's somebody else that is waiting to send, do nothing,
5767 * we will subscribe later and be put at the end of the list
5768 */
Willy Tarreaud9464162020-01-10 18:25:07 +01005769 if (!(h2s->flags & H2_SF_NOTIFIED) &&
Willy Tarreau7838a792019-08-12 18:42:03 +02005770 (!LIST_ISEMPTY(&h2s->h2c->send_list) || !LIST_ISEMPTY(&h2s->h2c->fctl_list))) {
5771 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 +01005772 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005773 }
Willy Tarreaud9464162020-01-10 18:25:07 +01005774 h2s->flags &= ~H2_SF_NOTIFIED;
Olivier Houchard998410a2019-04-15 19:23:37 +02005775
Willy Tarreau7838a792019-08-12 18:42:03 +02005776 if (h2s->h2c->st0 < H2_CS_FRAME_H) {
5777 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 +02005778 return 0;
Willy Tarreau7838a792019-08-12 18:42:03 +02005779 }
Willy Tarreau6bf641a2018-10-08 09:43:03 +02005780
Willy Tarreaucab22952019-10-31 15:48:18 +01005781 if (h2s->h2c->st0 >= H2_CS_ERROR) {
5782 cs->flags |= CS_FL_ERROR;
5783 TRACE_DEVEL("connection is in error, leaving in error", H2_EV_H2S_SEND|H2_EV_H2S_BLK|H2_EV_H2S_ERR|H2_EV_STRM_ERR, h2s->h2c->conn, h2s);
5784 return 0;
5785 }
5786
Christopher Faulet9b79a102019-07-15 11:22:56 +02005787 htx = htx_from_buf(buf);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005788
Willy Tarreau0bad0432018-06-14 16:54:01 +02005789 if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count)
Willy Tarreauc4312d32017-11-07 12:01:53 +01005790 h2s->flags |= H2_SF_OUTGOING_DATA;
5791
Willy Tarreau751f2d02018-10-05 09:35:00 +02005792 if (h2s->id == 0) {
5793 int32_t id = h2c_get_next_sid(h2s->h2c);
5794
5795 if (id < 0) {
Willy Tarreau751f2d02018-10-05 09:35:00 +02005796 cs->flags |= CS_FL_ERROR;
Willy Tarreau7838a792019-08-12 18:42:03 +02005797 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 +02005798 return 0;
5799 }
5800
5801 eb32_delete(&h2s->by_id);
5802 h2s->by_id.key = h2s->id = id;
5803 h2s->h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01005804 h2s->h2c->nb_reserved--;
Willy Tarreau751f2d02018-10-05 09:35:00 +02005805 eb32_insert(&h2s->h2c->streams_by_id, &h2s->by_id);
5806 }
5807
Christopher Faulet9b79a102019-07-15 11:22:56 +02005808 while (h2s->st < H2_SS_HLOC && !(h2s->flags & H2_SF_BLK_ANY) &&
5809 count && !htx_is_empty(htx)) {
5810 idx = htx_get_head(htx);
5811 blk = htx_get_blk(htx, idx);
5812 btype = htx_get_blk_type(blk);
5813 bsize = htx_get_blksz(blk);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005814
Christopher Faulet9b79a102019-07-15 11:22:56 +02005815 switch (btype) {
Willy Tarreau80739692018-10-05 11:35:57 +02005816 case HTX_BLK_REQ_SL:
5817 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005818 ret = h2s_bck_make_req_headers(h2s, htx);
Willy Tarreau80739692018-10-05 11:35:57 +02005819 if (ret > 0) {
5820 total += ret;
5821 count -= ret;
5822 if (ret < bsize)
5823 goto done;
5824 }
5825 break;
5826
Willy Tarreau115e83b2018-12-01 19:17:53 +01005827 case HTX_BLK_RES_SL:
5828 /* start-line before headers */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005829 ret = h2s_frt_make_resp_headers(h2s, htx);
Willy Tarreau115e83b2018-12-01 19:17:53 +01005830 if (ret > 0) {
5831 total += ret;
5832 count -= ret;
5833 if (ret < bsize)
5834 goto done;
5835 }
5836 break;
5837
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005838 case HTX_BLK_DATA:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005839 case HTX_BLK_EOM:
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005840 /* all these cause the emission of a DATA frame (possibly empty).
5841 * This EOM necessarily is one before trailers, as the EOM following
5842 * trailers would have been consumed by the trailers parser.
5843 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005844 ret = h2s_frt_make_resp_data(h2s, buf, count);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005845 if (ret > 0) {
Willy Tarreau98de12a2018-12-12 07:03:00 +01005846 htx = htx_from_buf(buf);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005847 total += ret;
5848 count -= ret;
5849 if (ret < bsize)
5850 goto done;
5851 }
5852 break;
5853
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005854 case HTX_BLK_TLR:
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005855 case HTX_BLK_EOT:
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005856 /* This is the first trailers block, all the subsequent ones AND
5857 * the EOM will be swallowed by the parser.
5858 */
Christopher Faulet9b79a102019-07-15 11:22:56 +02005859 ret = h2s_make_trailers(h2s, htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005860 if (ret > 0) {
5861 total += ret;
5862 count -= ret;
5863 if (ret < bsize)
5864 goto done;
5865 }
5866 break;
5867
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005868 default:
5869 htx_remove_blk(htx, blk);
5870 total += bsize;
5871 count -= bsize;
5872 break;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005873 }
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005874 }
5875
Christopher Faulet9b79a102019-07-15 11:22:56 +02005876 done:
Willy Tarreau2b778482019-05-06 15:00:22 +02005877 if (h2s->st >= H2_SS_HLOC) {
Willy Tarreau00610962018-07-19 10:58:28 +02005878 /* trim any possibly pending data after we close (extra CR-LF,
5879 * unprocessed trailers, abnormal extra data, ...)
5880 */
Willy Tarreau0bad0432018-06-14 16:54:01 +02005881 total += count;
5882 count = 0;
Willy Tarreau00610962018-07-19 10:58:28 +02005883 }
5884
Willy Tarreauc6795ca2017-11-07 09:43:06 +01005885 /* RST are sent similarly to frame acks */
Willy Tarreau02492192017-12-07 15:59:29 +01005886 if (h2s->st == H2_SS_ERROR || h2s->flags & H2_SF_RST_RCVD) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005887 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 +01005888 cs_set_error(cs);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01005889 if (h2s_send_rst_stream(h2s->h2c, h2s) > 0)
Willy Tarreau00dd0782018-03-01 16:31:34 +01005890 h2s_close(h2s);
Willy Tarreauc6795ca2017-11-07 09:43:06 +01005891 }
5892
Christopher Faulet9b79a102019-07-15 11:22:56 +02005893 htx_to_buf(htx, buf);
Olivier Houchardd846c262018-10-19 17:24:29 +02005894
Olivier Houchard7505f942018-08-21 18:10:44 +02005895 if (total > 0) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005896 if (!(h2s->h2c->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau7838a792019-08-12 18:42:03 +02005897 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 +02005898 tasklet_wakeup(h2s->h2c->wait_event.tasklet);
Olivier Houchardd846c262018-10-19 17:24:29 +02005899
Olivier Houchard7505f942018-08-21 18:10:44 +02005900 }
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01005901 /* If we're waiting for flow control, and we got a shutr on the
5902 * connection, we will never be unlocked, so add an error on
5903 * the conn_stream.
5904 */
5905 if (conn_xprt_read0_pending(h2s->h2c->conn) &&
5906 !b_data(&h2s->h2c->dbuf) &&
5907 (h2s->flags & (H2_SF_BLK_SFCTL | H2_SF_BLK_MFCTL))) {
Willy Tarreau7838a792019-08-12 18:42:03 +02005908 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 +01005909 if (cs->flags & CS_FL_EOS)
5910 cs->flags |= CS_FL_ERROR;
5911 else
5912 cs->flags |= CS_FL_ERR_PENDING;
5913 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02005914
Willy Tarreau5723f292020-01-10 15:16:57 +01005915 if (total > 0 && !(h2s->flags & H2_SF_BLK_SFCTL) &&
5916 !(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Willy Tarreau9edf6db2019-10-02 10:49:59 +02005917 /* Ok we managed to send something, leave the send_list if we were still there */
Olivier Houchardd360ac62019-03-22 17:37:16 +01005918 LIST_DEL_INIT(&h2s->list);
5919 }
Willy Tarreau9edf6db2019-10-02 10:49:59 +02005920
Willy Tarreau7838a792019-08-12 18:42:03 +02005921 TRACE_LEAVE(H2_EV_H2S_SEND|H2_EV_STRM_SEND, h2s->h2c->conn, h2s);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005922 return total;
Willy Tarreau62f52692017-10-08 23:01:42 +02005923}
5924
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005925/* for debugging with CLI's "show fd" command */
Willy Tarreau83061a82018-07-13 11:56:34 +02005926static void h2_show_fd(struct buffer *msg, struct connection *conn)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005927{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01005928 struct h2c *h2c = conn->ctx;
Willy Tarreau987c0632018-12-18 10:32:05 +01005929 struct h2s *h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005930 struct eb32_node *node;
5931 int fctl_cnt = 0;
5932 int send_cnt = 0;
5933 int tree_cnt = 0;
5934 int orph_cnt = 0;
Willy Tarreau60f62682019-05-26 11:32:27 +02005935 struct buffer *hmbuf, *tmbuf;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005936
5937 if (!h2c)
5938 return;
5939
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005940 list_for_each_entry(h2s, &h2c->fctl_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005941 fctl_cnt++;
5942
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005943 list_for_each_entry(h2s, &h2c->send_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005944 send_cnt++;
5945
Willy Tarreau3af37712018-12-18 14:34:41 +01005946 h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005947 node = eb32_first(&h2c->streams_by_id);
5948 while (node) {
5949 h2s = container_of(node, struct h2s, by_id);
5950 tree_cnt++;
5951 if (!h2s->cs)
5952 orph_cnt++;
5953 node = eb32_next(node);
5954 }
5955
Willy Tarreau60f62682019-05-26 11:32:27 +02005956 hmbuf = br_head(h2c->mbuf);
Willy Tarreaubcc45952019-05-26 10:05:50 +02005957 tmbuf = br_tail(h2c->mbuf);
Willy Tarreauab2ec452019-08-30 07:07:08 +02005958 chunk_appendf(msg, " h2c.st0=%s .err=%d .maxid=%d .lastid=%d .flg=0x%04x"
Willy Tarreau987c0632018-12-18 10:32:05 +01005959 " .nbst=%u .nbcs=%u .fctl_cnt=%d .send_cnt=%d .tree_cnt=%d"
Willy Tarreau60f62682019-05-26 11:32:27 +02005960 " .orph_cnt=%d .sub=%d .dsi=%d .dbuf=%u@%p+%u/%u .msi=%d"
5961 " .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]",
Willy Tarreauab2ec452019-08-30 07:07:08 +02005962 h2c_st_to_str(h2c->st0), h2c->errcode, h2c->max_id, h2c->last_sid, h2c->flags,
Willy Tarreau616ac812018-07-24 14:12:42 +02005963 h2c->nb_streams, h2c->nb_cs, fctl_cnt, send_cnt, tree_cnt, orph_cnt,
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005964 h2c->wait_event.events, h2c->dsi,
Willy Tarreau987c0632018-12-18 10:32:05 +01005965 (unsigned int)b_data(&h2c->dbuf), b_orig(&h2c->dbuf),
5966 (unsigned int)b_head_ofs(&h2c->dbuf), (unsigned int)b_size(&h2c->dbuf),
5967 h2c->msi,
Willy Tarreau60f62682019-05-26 11:32:27 +02005968 br_head_idx(h2c->mbuf), br_tail_idx(h2c->mbuf), br_size(h2c->mbuf),
5969 (unsigned int)b_data(hmbuf), b_orig(hmbuf),
5970 (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf),
Willy Tarreaubcc45952019-05-26 10:05:50 +02005971 (unsigned int)b_data(tmbuf), b_orig(tmbuf),
5972 (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf));
Willy Tarreau987c0632018-12-18 10:32:05 +01005973
5974 if (h2s) {
Willy Tarreauab2ec452019-08-30 07:07:08 +02005975 chunk_appendf(msg, " last_h2s=%p .id=%d .st=%s.flg=0x%04x .rxbuf=%u@%p+%u/%u .cs=%p",
5976 h2s, h2s->id, h2s_st_to_str(h2s->st), h2s->flags,
Willy Tarreau987c0632018-12-18 10:32:05 +01005977 (unsigned int)b_data(&h2s->rxbuf), b_orig(&h2s->rxbuf),
5978 (unsigned int)b_head_ofs(&h2s->rxbuf), (unsigned int)b_size(&h2s->rxbuf),
5979 h2s->cs);
5980 if (h2s->cs)
5981 chunk_appendf(msg, " .cs.flg=0x%08x .cs.data=%p",
5982 h2s->cs->flags, h2s->cs->data);
5983 }
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005984}
Willy Tarreau62f52692017-10-08 23:01:42 +02005985
5986/*******************************************************/
5987/* functions below are dedicated to the config parsers */
5988/*******************************************************/
5989
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02005990/* config parser for global "tune.h2.header-table-size" */
5991static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx,
5992 struct proxy *defpx, const char *file, int line,
5993 char **err)
5994{
5995 if (too_many_args(1, args, err, NULL))
5996 return -1;
5997
5998 h2_settings_header_table_size = atoi(args[1]);
5999 if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) {
6000 memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]);
6001 return -1;
6002 }
6003 return 0;
6004}
Willy Tarreau62f52692017-10-08 23:01:42 +02006005
Willy Tarreaue6baec02017-07-27 11:45:11 +02006006/* config parser for global "tune.h2.initial-window-size" */
6007static int h2_parse_initial_window_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_initial_window_size = atoi(args[1]);
6015 if (h2_settings_initial_window_size < 0) {
6016 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6017 return -1;
6018 }
6019 return 0;
6020}
6021
Willy Tarreau5242ef82017-07-27 11:47:28 +02006022/* config parser for global "tune.h2.max-concurrent-streams" */
6023static int h2_parse_max_concurrent_streams(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_max_concurrent_streams = atoi(args[1]);
Willy Tarreau5a490b62019-01-31 10:39:51 +01006031 if ((int)h2_settings_max_concurrent_streams < 0) {
Willy Tarreau5242ef82017-07-27 11:47:28 +02006032 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
6033 return -1;
6034 }
6035 return 0;
6036}
6037
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006038/* config parser for global "tune.h2.max-frame-size" */
6039static int h2_parse_max_frame_size(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_frame_size = atoi(args[1]);
6047 if (h2_settings_max_frame_size < 16384 || h2_settings_max_frame_size > 16777215) {
6048 memprintf(err, "'%s' expects a numeric value between 16384 and 16777215.", args[0]);
6049 return -1;
6050 }
6051 return 0;
6052}
6053
Willy Tarreau62f52692017-10-08 23:01:42 +02006054
6055/****************************************/
6056/* MUX initialization and instanciation */
6057/***************************************/
6058
6059/* The mux operations */
Willy Tarreau680b2bd2018-11-27 07:30:17 +01006060static const struct mux_ops h2_ops = {
Willy Tarreau62f52692017-10-08 23:01:42 +02006061 .init = h2_init,
Olivier Houchard21df6cc2018-09-14 23:21:44 +02006062 .wake = h2_wake,
Willy Tarreau62f52692017-10-08 23:01:42 +02006063 .snd_buf = h2_snd_buf,
Olivier Houchard511efea2018-08-16 15:30:32 +02006064 .rcv_buf = h2_rcv_buf,
Olivier Houchard6ff20392018-07-17 18:46:31 +02006065 .subscribe = h2_subscribe,
Olivier Houchard83a0cd82018-09-28 17:57:58 +02006066 .unsubscribe = h2_unsubscribe,
Willy Tarreau62f52692017-10-08 23:01:42 +02006067 .attach = h2_attach,
Willy Tarreaufafd3982018-11-18 21:29:20 +01006068 .get_first_cs = h2_get_first_cs,
Willy Tarreau62f52692017-10-08 23:01:42 +02006069 .detach = h2_detach,
Olivier Houchard060ed432018-11-06 16:32:42 +01006070 .destroy = h2_destroy,
Olivier Houchardd540b362018-11-05 18:37:53 +01006071 .avail_streams = h2_avail_streams,
Willy Tarreau00f18a32019-01-26 12:19:01 +01006072 .used_streams = h2_used_streams,
Willy Tarreau62f52692017-10-08 23:01:42 +02006073 .shutr = h2_shutr,
6074 .shutw = h2_shutw,
Olivier Houchard9b8e11e2019-10-25 16:19:26 +02006075 .ctl = h2_ctl,
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02006076 .show_fd = h2_show_fd,
Christopher Faulet9b79a102019-07-15 11:22:56 +02006077 .flags = MX_FL_CLEAN_ABRT|MX_FL_HTX,
Willy Tarreau62f52692017-10-08 23:01:42 +02006078 .name = "H2",
6079};
6080
Christopher Faulet32f61c02018-04-10 14:33:41 +02006081static struct mux_proto_list mux_proto_h2 =
Christopher Fauletc985f6c2019-07-15 11:42:52 +02006082 { .token = IST("h2"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BOTH, .mux = &h2_ops };
Willy Tarreau62f52692017-10-08 23:01:42 +02006083
Willy Tarreau0108d902018-11-25 19:14:37 +01006084INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2);
6085
Willy Tarreau62f52692017-10-08 23:01:42 +02006086/* config keyword parsers */
6087static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02006088 { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size },
Willy Tarreaue6baec02017-07-27 11:45:11 +02006089 { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size },
Willy Tarreau5242ef82017-07-27 11:47:28 +02006090 { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreaua24b35c2019-02-21 13:24:36 +01006091 { CFG_GLOBAL, "tune.h2.max-frame-size", h2_parse_max_frame_size },
Willy Tarreau62f52692017-10-08 23:01:42 +02006092 { 0, NULL, NULL }
6093}};
6094
Willy Tarreau0108d902018-11-25 19:14:37 +01006095INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);