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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>
Olivier Houchard44d59142018-12-13 18:46:22 +010025#include <proto/session.h>
Willy Tarreau62f52692017-10-08 23:01:42 +020026#include <proto/stream.h>
Olivier Houchard44d59142018-12-13 18:46:22 +010027#include <proto/stream_interface.h>
Willy Tarreauea392822017-10-31 10:02:25 +010028#include <types/session.h>
Willy Tarreau5ab6b572017-09-22 08:05:00 +020029#include <eb32tree.h>
Willy Tarreau62f52692017-10-08 23:01:42 +020030
31
Willy Tarreauecb9dcd2019-01-03 12:00:17 +010032/* dummy streams returned for closed, error, refused, idle and states */
Willy Tarreau2a856182017-05-16 15:20:39 +020033static const struct h2s *h2_closed_stream;
Willy Tarreauecb9dcd2019-01-03 12:00:17 +010034static const struct h2s *h2_error_stream;
Willy Tarreau8d0d58b2018-12-23 18:29:12 +010035static const struct h2s *h2_refused_stream;
Willy Tarreau2a856182017-05-16 15:20:39 +020036static const struct h2s *h2_idle_stream;
37
Willy Tarreau5ab6b572017-09-22 08:05:00 +020038/* Connection flags (32 bit), in h2c->flags */
39#define H2_CF_NONE 0x00000000
40
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020041/* Flags indicating why writing to the mux is blocked. */
42#define H2_CF_MUX_MALLOC 0x00000001 // mux blocked on lack of connection's mux buffer
43#define H2_CF_MUX_MFULL 0x00000002 // mux blocked on connection's mux buffer full
44#define H2_CF_MUX_BLOCK_ANY 0x00000003 // aggregate of the mux flags above
45
Willy Tarreau315d8072017-12-10 22:17:57 +010046/* Flags indicating why writing to the demux is blocked.
47 * The first two ones directly affect the ability for the mux to receive data
48 * from the connection. The other ones affect the mux's ability to demux
49 * received data.
50 */
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020051#define H2_CF_DEM_DALLOC 0x00000004 // demux blocked on lack of connection's demux buffer
52#define H2_CF_DEM_DFULL 0x00000008 // demux blocked on connection's demux buffer full
Willy Tarreau315d8072017-12-10 22:17:57 +010053
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020054#define H2_CF_DEM_MBUSY 0x00000010 // demux blocked on connection's mux side busy
55#define H2_CF_DEM_MROOM 0x00000020 // demux blocked on lack of room in mux buffer
56#define H2_CF_DEM_SALLOC 0x00000040 // demux blocked on lack of stream's request buffer
57#define H2_CF_DEM_SFULL 0x00000080 // demux blocked on stream request buffer full
Willy Tarreauf2101912018-07-19 10:11:38 +020058#define H2_CF_DEM_TOOMANY 0x00000100 // demux blocked waiting for some conn_streams to leave
59#define H2_CF_DEM_BLOCK_ANY 0x000001F0 // aggregate of the demux flags above except DALLOC/DFULL
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020060
Willy Tarreau081d4722017-05-16 21:51:05 +020061/* other flags */
Willy Tarreauf2101912018-07-19 10:11:38 +020062#define H2_CF_GOAWAY_SENT 0x00001000 // a GOAWAY frame was successfully sent
63#define H2_CF_GOAWAY_FAILED 0x00002000 // a GOAWAY frame failed to be sent
64#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 +020065#define H2_CF_IS_BACK 0x00008000 // this is an outgoing connection
Willy Tarreau97aaa672018-12-23 09:49:04 +010066#define H2_CF_WINDOW_OPENED 0x00010000 // demux increased window already advertised
Willy Tarreau081d4722017-05-16 21:51:05 +020067
Willy Tarreau5ab6b572017-09-22 08:05:00 +020068/* H2 connection state, in h2c->st0 */
69enum h2_cs {
70 H2_CS_PREFACE, // init done, waiting for connection preface
71 H2_CS_SETTINGS1, // preface OK, waiting for first settings frame
72 H2_CS_FRAME_H, // first settings frame ok, waiting for frame header
73 H2_CS_FRAME_P, // frame header OK, waiting for frame payload
Willy Tarreaua20a5192017-12-27 11:02:06 +010074 H2_CS_FRAME_A, // frame payload OK, trying to send ACK frame
75 H2_CS_FRAME_E, // frame payload OK, trying to send RST frame
Willy Tarreau5ab6b572017-09-22 08:05:00 +020076 H2_CS_ERROR, // send GOAWAY(errcode) and close the connection ASAP
77 H2_CS_ERROR2, // GOAWAY(errcode) sent, close the connection ASAP
78 H2_CS_ENTRIES // must be last
79} __attribute__((packed));
80
Willy Tarreau51330962019-05-26 09:38:07 +020081
Willy Tarreau9c218e72019-05-26 10:08:28 +020082/* 32 buffers: one for the ring's root, rest for the mbuf itself */
83#define H2C_MBUF_CNT 32
Willy Tarreau51330962019-05-26 09:38:07 +020084
Willy Tarreau5ab6b572017-09-22 08:05:00 +020085/* H2 connection descriptor */
86struct h2c {
87 struct connection *conn;
88
89 enum h2_cs st0; /* mux state */
90 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
91
92 /* 16 bit hole here */
93 uint32_t flags; /* connection flags: H2_CF_* */
Willy Tarreau2e2083a2019-01-31 10:34:07 +010094 uint32_t streams_limit; /* maximum number of concurrent streams the peer supports */
Willy Tarreau5ab6b572017-09-22 08:05:00 +020095 int32_t max_id; /* highest ID known on this connection, <0 before preface */
96 uint32_t rcvd_c; /* newly received data to ACK for the connection */
97 uint32_t rcvd_s; /* newly received data to ACK for the current stream (dsi) */
98
99 /* states for the demux direction */
100 struct hpack_dht *ddht; /* demux dynamic header table */
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200101 struct buffer dbuf; /* demux buffer */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200102
103 int32_t dsi; /* demux stream ID (<0 = idle) */
104 int32_t dfl; /* demux frame length (if dsi >= 0) */
105 int8_t dft; /* demux frame type (if dsi >= 0) */
106 int8_t dff; /* demux frame flags (if dsi >= 0) */
Willy Tarreau05e5daf2017-12-11 15:17:36 +0100107 uint8_t dpl; /* demux pad length (part of dfl), init to 0 */
108 /* 8 bit hole here */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200109 int32_t last_sid; /* last processed stream ID for GOAWAY, <0 before preface */
110
111 /* states for the mux direction */
Willy Tarreau51330962019-05-26 09:38:07 +0200112 struct buffer mbuf[H2C_MBUF_CNT]; /* mux buffers (ring) */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200113 int32_t msi; /* mux stream ID (<0 = idle) */
114 int32_t mfl; /* mux frame length (if dsi >= 0) */
115 int8_t mft; /* mux frame type (if dsi >= 0) */
116 int8_t mff; /* mux frame flags (if dsi >= 0) */
117 /* 16 bit hole here */
118 int32_t miw; /* mux initial window size for all new streams */
119 int32_t mws; /* mux window size. Can be negative. */
120 int32_t mfs; /* mux's max frame size */
121
Willy Tarreauea392822017-10-31 10:02:25 +0100122 int timeout; /* idle timeout duration in ticks */
Willy Tarreau599391a2017-11-24 10:16:00 +0100123 int shut_timeout; /* idle timeout duration in ticks after GOAWAY was sent */
Willy Tarreau49745612017-12-03 18:56:02 +0100124 unsigned int nb_streams; /* number of streams in the tree */
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200125 unsigned int nb_cs; /* number of attached conn_streams */
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100126 unsigned int nb_reserved; /* number of reserved streams */
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100127 unsigned int stream_cnt; /* total number of streams seen */
Willy Tarreau0b37d652018-10-03 10:33:02 +0200128 struct proxy *proxy; /* the proxy this connection was created for */
Willy Tarreauea392822017-10-31 10:02:25 +0100129 struct task *task; /* timeout management task */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200130 struct eb_root streams_by_id; /* all active streams by their ID */
131 struct list send_list; /* list of blocked streams requesting to send */
132 struct list fctl_list; /* list of streams blocked by connection's fctl */
Olivier Houchardd846c262018-10-19 17:24:29 +0200133 struct list sending_list; /* list of h2s scheduled to send data */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100134 struct buffer_wait buf_wait; /* wait list for buffer allocations */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200135 struct wait_event wait_event; /* To be used if we're waiting for I/Os */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200136};
137
Willy Tarreau18312642017-10-11 07:57:07 +0200138/* H2 stream state, in h2s->st */
139enum h2_ss {
140 H2_SS_IDLE = 0, // idle
141 H2_SS_RLOC, // reserved(local)
142 H2_SS_RREM, // reserved(remote)
143 H2_SS_OPEN, // open
144 H2_SS_HREM, // half-closed(remote)
145 H2_SS_HLOC, // half-closed(local)
Willy Tarreau96060ba2017-10-16 18:34:34 +0200146 H2_SS_ERROR, // an error needs to be sent using RST_STREAM
Willy Tarreau18312642017-10-11 07:57:07 +0200147 H2_SS_CLOSED, // closed
148 H2_SS_ENTRIES // must be last
149} __attribute__((packed));
150
Willy Tarreau4c688eb2019-05-14 11:44:03 +0200151#define H2_SS_MASK(state) (1UL << (state))
152#define H2_SS_IDLE_BIT (1UL << H2_SS_IDLE)
153#define H2_SS_RLOC_BIT (1UL << H2_SS_RLOC)
154#define H2_SS_RREM_BIT (1UL << H2_SS_RREM)
155#define H2_SS_OPEN_BIT (1UL << H2_SS_OPEN)
156#define H2_SS_HREM_BIT (1UL << H2_SS_HREM)
157#define H2_SS_HLOC_BIT (1UL << H2_SS_HLOC)
158#define H2_SS_ERROR_BIT (1UL << H2_SS_ERROR)
159#define H2_SS_CLOSED_BIT (1UL << H2_SS_CLOSED)
160#define H2_SS_EOS_BITS (H2_SS_CLOSED_BIT|H2_SS_ERROR_BIT|H2_SS_HREM_BIT)
161
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)
172#define H2_SF_BLK_MROOM 0x00000020 // blocked waiting for room in the mux
173#define H2_SF_BLK_MFCTL 0x00000040 // blocked due to mux fctl
174#define H2_SF_BLK_SFCTL 0x00000080 // blocked due to stream fctl
175#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
179#define H2_SF_DATA_CHNK 0x00000200 // data sent using chunked-encoding
180
181/* step we're currently in when sending chunks. This is needed because we may
182 * have to transfer chunks as large as a full buffer so there's no room left
183 * for size nor crlf around.
184 */
185#define H2_SF_CHNK_SIZE 0x00000000 // trying to send chunk size
186#define H2_SF_CHNK_DATA 0x00000400 // trying to send chunk data
187#define H2_SF_CHNK_CRLF 0x00000800 // trying to send chunk crlf after data
188
189#define H2_SF_CHNK_MASK 0x00000C00 // trying to send chunk size
190
Willy Tarreau67434202017-11-06 20:20:51 +0100191#define H2_SF_HEADERS_SENT 0x00001000 // a HEADERS frame was sent for this stream
Willy Tarreauc4312d32017-11-07 12:01:53 +0100192#define H2_SF_OUTGOING_DATA 0x00002000 // set whenever we've seen outgoing data
Willy Tarreau67434202017-11-06 20:20:51 +0100193
Willy Tarreau6cc85a52019-01-02 15:49:20 +0100194#define H2_SF_HEADERS_RCVD 0x00004000 // a HEADERS frame was received for this stream
195
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200196#define H2_SF_WANT_SHUTR 0x00008000 // a stream couldn't shutr() (mux full/busy)
197#define H2_SF_WANT_SHUTW 0x00010000 // a stream couldn't shutw() (mux full/busy)
Willy Tarreau3cf69fe2019-05-14 10:44:40 +0200198#define H2_SF_KILL_CONN 0x00020000 // kill the whole connection with this stream
Willy Tarreau2c249eb2019-05-13 18:06:17 +0200199
200
Willy Tarreau18312642017-10-11 07:57:07 +0200201/* H2 stream descriptor, describing the stream as it appears in the H2C, and as
202 * it is being processed in the internal HTTP representation (H1 for now).
203 */
204struct h2s {
205 struct conn_stream *cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +0100206 struct session *sess;
Willy Tarreau18312642017-10-11 07:57:07 +0200207 struct h2c *h2c;
Willy Tarreaua40704a2018-09-11 13:52:04 +0200208 struct h1m h1m; /* request or response parser state for H1 */
Willy Tarreau18312642017-10-11 07:57:07 +0200209 struct eb32_node by_id; /* place in h2c's streams_by_id */
Willy Tarreau18312642017-10-11 07:57:07 +0200210 int32_t id; /* stream ID */
211 uint32_t flags; /* H2_SF_* */
212 int mws; /* mux window size for this stream */
213 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
214 enum h2_ss st;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +0200215 uint16_t status; /* HTTP response status */
Willy Tarreau1915ca22019-01-24 11:49:37 +0100216 unsigned long long body_len; /* remaining body length according to content-length if H2_SF_DATA_CLEN */
Olivier Houchard638b7992018-08-16 15:41:52 +0200217 struct buffer rxbuf; /* receive buffer, always valid (buf_empty or real buffer) */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200218 struct wait_event wait_event; /* Wait list, when we're attempting to send a RST but we can't send */
Willy Tarreau749f5ca2019-03-21 19:19:36 +0100219 struct wait_event *recv_wait; /* recv wait_event the conn_stream associated is waiting on (via h2_subscribe) */
220 struct wait_event *send_wait; /* send wait_event the conn_stream associated is waiting on (via h2_subscribe) */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200221 struct list list; /* To be used when adding in h2c->send_list or h2c->fctl_lsit */
Olivier Houchardd360ac62019-03-22 17:37:16 +0100222 struct list sending_list; /* To be used when adding in h2c->sending_list */
Willy Tarreau18312642017-10-11 07:57:07 +0200223};
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200224
Willy Tarreauc6405142017-09-21 20:23:50 +0200225/* descriptor for an h2 frame header */
226struct h2_fh {
227 uint32_t len; /* length, host order, 24 bits */
228 uint32_t sid; /* stream id, host order, 31 bits */
229 uint8_t ft; /* frame type */
230 uint8_t ff; /* frame flags */
231};
232
Willy Tarreau8ceae722018-11-26 11:58:30 +0100233/* the h2c connection pool */
234DECLARE_STATIC_POOL(pool_head_h2c, "h2c", sizeof(struct h2c));
235
236/* the h2s stream pool */
237DECLARE_STATIC_POOL(pool_head_h2s, "h2s", sizeof(struct h2s));
238
Willy Tarreaudc572362018-12-12 08:08:05 +0100239/* The default connection window size is 65535, it may only be enlarged using
240 * a WINDOW_UPDATE message. Since the window must never be larger than 2G-1,
241 * we'll pretend we already received the difference between the two to send
242 * an equivalent window update to enlarge it to 2G-1.
243 */
244#define H2_INITIAL_WINDOW_INCREMENT ((1U<<31)-1 - 65535)
245
Willy Tarreau455d5682019-05-24 19:42:18 +0200246/* maximum amount of data we're OK with re-aligning for buffer optimizations */
247#define MAX_DATA_REALIGN 1024
248
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200249/* a few settings from the global section */
250static int h2_settings_header_table_size = 4096; /* initial value */
Willy Tarreaue6baec02017-07-27 11:45:11 +0200251static int h2_settings_initial_window_size = 65535; /* initial value */
Willy Tarreau5a490b62019-01-31 10:39:51 +0100252static unsigned int h2_settings_max_concurrent_streams = 100;
Willy Tarreaua24b35c2019-02-21 13:24:36 +0100253static int h2_settings_max_frame_size = 0; /* unset */
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200254
Willy Tarreau2a856182017-05-16 15:20:39 +0200255/* a dmumy closed stream */
256static const struct h2s *h2_closed_stream = &(const struct h2s){
257 .cs = NULL,
258 .h2c = NULL,
259 .st = H2_SS_CLOSED,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100260 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreauab837502017-12-27 15:07:30 +0100261 .flags = H2_SF_RST_RCVD,
Willy Tarreau2a856182017-05-16 15:20:39 +0200262 .id = 0,
263};
264
Willy Tarreauecb9dcd2019-01-03 12:00:17 +0100265/* a dmumy closed stream returning a PROTOCOL_ERROR error */
266static const struct h2s *h2_error_stream = &(const struct h2s){
267 .cs = NULL,
268 .h2c = NULL,
269 .st = H2_SS_CLOSED,
270 .errcode = H2_ERR_PROTOCOL_ERROR,
271 .flags = 0,
272 .id = 0,
273};
274
Willy Tarreau8d0d58b2018-12-23 18:29:12 +0100275/* a dmumy closed stream returning a REFUSED_STREAM error */
276static const struct h2s *h2_refused_stream = &(const struct h2s){
277 .cs = NULL,
278 .h2c = NULL,
279 .st = H2_SS_CLOSED,
280 .errcode = H2_ERR_REFUSED_STREAM,
281 .flags = 0,
282 .id = 0,
283};
284
Willy Tarreau2a856182017-05-16 15:20:39 +0200285/* and a dummy idle stream for use with any unannounced stream */
286static const struct h2s *h2_idle_stream = &(const struct h2s){
287 .cs = NULL,
288 .h2c = NULL,
289 .st = H2_SS_IDLE,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100290 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreau2a856182017-05-16 15:20:39 +0200291 .id = 0,
292};
293
Olivier Houchard9f6af332018-05-25 14:04:04 +0200294static struct task *h2_timeout_task(struct task *t, void *context, unsigned short state);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +0200295static int h2_send(struct h2c *h2c);
296static int h2_recv(struct h2c *h2c);
Olivier Houchard7505f942018-08-21 18:10:44 +0200297static int h2_process(struct h2c *h2c);
Olivier Houchard29fb89d2018-08-02 18:56:36 +0200298static struct task *h2_io_cb(struct task *t, void *ctx, unsigned short state);
Willy Tarreau0b559072018-02-26 15:22:17 +0100299static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id);
Willy Tarreau4790f7c2019-01-24 11:33:02 +0100300static 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 +0100301static int h2_frt_transfer_data(struct h2s *h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +0200302static struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned short state);
Olivier Houchardf502aca2018-12-14 19:42:40 +0100303static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess);
Willy Tarreau8b2757c2018-12-19 17:36:48 +0100304static void h2s_alert(struct h2s *h2s);
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200305
Olivier Houchard7a977432019-03-21 15:47:13 +0100306static __inline int
307h2c_is_dead(struct h2c *h2c)
308{
309 if (eb_is_empty(&h2c->streams_by_id) && /* don't close if streams exist */
310 ((h2c->conn->flags & CO_FL_ERROR) || /* errors close immediately */
311 (h2c->st0 >= H2_CS_ERROR && !h2c->task) || /* a timeout stroke earlier */
312 (!(h2c->conn->owner)) || /* Nobody's left to take care of the connection, drop it now */
Willy Tarreau662fafc2019-05-26 09:43:07 +0200313 (!br_data(h2c->mbuf) && /* mux buffer empty, also process clean events below */
Olivier Houchard7a977432019-03-21 15:47:13 +0100314 (conn_xprt_read0_pending(h2c->conn) ||
315 (h2c->last_sid >= 0 && h2c->max_id >= h2c->last_sid)))))
316 return 1;
317
318 return 0;
Olivier Houchard7a977432019-03-21 15:47:13 +0100319}
320
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200321/*****************************************************/
322/* functions below are for dynamic buffer management */
323/*****************************************************/
324
Willy Tarreau315d8072017-12-10 22:17:57 +0100325/* indicates whether or not the we may call the h2_recv() function to attempt
326 * to receive data into the buffer and/or demux pending data. The condition is
327 * a bit complex due to some API limits for now. The rules are the following :
328 * - if an error or a shutdown was detected on the connection and the buffer
329 * is empty, we must not attempt to receive
330 * - if the demux buf failed to be allocated, we must not try to receive and
331 * we know there is nothing pending
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100332 * - if no flag indicates a blocking condition, we may attempt to receive,
333 * regardless of whether the demux buffer is full or not, so that only
334 * de demux part decides whether or not to block. This is needed because
335 * the connection API indeed prevents us from re-enabling receipt that is
336 * already enabled in a polled state, so we must always immediately stop
337 * as soon as the demux can't proceed so as never to hit an end of read
338 * with data pending in the buffers.
Willy Tarreau315d8072017-12-10 22:17:57 +0100339 * - otherwise must may not attempt
340 */
341static inline int h2_recv_allowed(const struct h2c *h2c)
342{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200343 if (b_data(&h2c->dbuf) == 0 &&
Willy Tarreau315d8072017-12-10 22:17:57 +0100344 (h2c->st0 >= H2_CS_ERROR ||
345 h2c->conn->flags & CO_FL_ERROR ||
346 conn_xprt_read0_pending(h2c->conn)))
347 return 0;
348
349 if (!(h2c->flags & H2_CF_DEM_DALLOC) &&
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100350 !(h2c->flags & H2_CF_DEM_BLOCK_ANY))
Willy Tarreau315d8072017-12-10 22:17:57 +0100351 return 1;
352
353 return 0;
354}
355
Willy Tarreau47b515a2018-12-21 16:09:41 +0100356/* restarts reading on the connection if it was not enabled */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200357static inline void h2c_restart_reading(const struct h2c *h2c, int consider_buffer)
Willy Tarreau47b515a2018-12-21 16:09:41 +0100358{
359 if (!h2_recv_allowed(h2c))
360 return;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200361 if ((!consider_buffer || !b_data(&h2c->dbuf))
362 && (h2c->wait_event.events & SUB_RETRY_RECV))
Willy Tarreau47b515a2018-12-21 16:09:41 +0100363 return;
364 tasklet_wakeup(h2c->wait_event.task);
365}
366
367
Willy Tarreaufa1d3572019-01-31 10:31:51 +0100368/* returns true if the front connection has too many conn_streams attached */
369static inline int h2_frt_has_too_many_cs(const struct h2c *h2c)
Willy Tarreauf2101912018-07-19 10:11:38 +0200370{
Willy Tarreaua8754662018-12-23 20:43:58 +0100371 return h2c->nb_cs > h2_settings_max_concurrent_streams;
Willy Tarreauf2101912018-07-19 10:11:38 +0200372}
373
Willy Tarreau44e973f2018-03-01 17:49:30 +0100374/* Tries to grab a buffer and to re-enable processing on mux <target>. The h2c
375 * flags are used to figure what buffer was requested. It returns 1 if the
376 * allocation succeeds, in which case the connection is woken up, or 0 if it's
377 * impossible to wake up and we prefer to be woken up later.
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200378 */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100379static int h2_buf_available(void *target)
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200380{
381 struct h2c *h2c = target;
Willy Tarreau0b559072018-02-26 15:22:17 +0100382 struct h2s *h2s;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200383
Willy Tarreau44e973f2018-03-01 17:49:30 +0100384 if ((h2c->flags & H2_CF_DEM_DALLOC) && b_alloc_margin(&h2c->dbuf, 0)) {
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200385 h2c->flags &= ~H2_CF_DEM_DALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200386 h2c_restart_reading(h2c, 1);
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200387 return 1;
388 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200389
Willy Tarreau51330962019-05-26 09:38:07 +0200390 if ((h2c->flags & H2_CF_MUX_MALLOC) && b_alloc_margin(br_tail(h2c->mbuf), 0)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100391 h2c->flags &= ~H2_CF_MUX_MALLOC;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200392
393 if (h2c->flags & H2_CF_DEM_MROOM) {
394 h2c->flags &= ~H2_CF_DEM_MROOM;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200395 h2c_restart_reading(h2c, 1);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200396 }
Willy Tarreau14398122017-09-22 14:26:04 +0200397 return 1;
398 }
Willy Tarreau0b559072018-02-26 15:22:17 +0100399
400 if ((h2c->flags & H2_CF_DEM_SALLOC) &&
401 (h2s = h2c_st_by_id(h2c, h2c->dsi)) && h2s->cs &&
Olivier Houchard638b7992018-08-16 15:41:52 +0200402 b_alloc_margin(&h2s->rxbuf, 0)) {
Willy Tarreau0b559072018-02-26 15:22:17 +0100403 h2c->flags &= ~H2_CF_DEM_SALLOC;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200404 h2c_restart_reading(h2c, 1);
Willy Tarreau0b559072018-02-26 15:22:17 +0100405 return 1;
406 }
407
Willy Tarreau14398122017-09-22 14:26:04 +0200408 return 0;
409}
410
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200411static inline struct buffer *h2_get_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200412{
413 struct buffer *buf = NULL;
414
Willy Tarreauc234ae32019-05-13 17:56:11 +0200415 if (likely(!LIST_ADDED(&h2c->buf_wait.list)) &&
Willy Tarreau44e973f2018-03-01 17:49:30 +0100416 unlikely((buf = b_alloc_margin(bptr, 0)) == NULL)) {
417 h2c->buf_wait.target = h2c;
418 h2c->buf_wait.wakeup_cb = h2_buf_available;
Christopher Faulet2a944ee2017-11-07 10:42:54 +0100419 HA_SPIN_LOCK(BUF_WQ_LOCK, &buffer_wq_lock);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100420 LIST_ADDQ(&buffer_wq, &h2c->buf_wait.list);
Christopher Faulet2a944ee2017-11-07 10:42:54 +0100421 HA_SPIN_UNLOCK(BUF_WQ_LOCK, &buffer_wq_lock);
Willy Tarreau14398122017-09-22 14:26:04 +0200422 __conn_xprt_stop_recv(h2c->conn);
423 }
424 return buf;
425}
426
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200427static inline void h2_release_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200428{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200429 if (bptr->size) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100430 b_free(bptr);
Willy Tarreau201840a2019-05-29 17:50:48 +0200431 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau14398122017-09-22 14:26:04 +0200432 }
433}
434
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200435static inline void h2_release_mbuf(struct h2c *h2c)
436{
437 struct buffer *buf;
438 unsigned int count = 0;
439
440 while (b_size(buf = br_head_pick(h2c->mbuf))) {
441 b_free(buf);
442 count++;
443 }
444 if (count)
Willy Tarreau201840a2019-05-29 17:50:48 +0200445 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200446}
447
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100448/* returns the number of allocatable outgoing streams for the connection taking
449 * the last_sid and the reserved ones into account.
450 */
451static inline int h2_streams_left(const struct h2c *h2c)
452{
453 int ret;
454
455 /* consider the number of outgoing streams we're allowed to create before
456 * reaching the last GOAWAY frame seen. max_id is the last assigned id,
457 * nb_reserved is the number of streams which don't yet have an ID.
458 */
459 ret = (h2c->last_sid >= 0) ? h2c->last_sid : 0x7FFFFFFF;
460 ret = (unsigned int)(ret - h2c->max_id) / 2 - h2c->nb_reserved - 1;
461 if (ret < 0)
462 ret = 0;
463 return ret;
464}
465
Willy Tarreau00f18a32019-01-26 12:19:01 +0100466/* returns the number of streams in use on a connection to figure if it's
467 * idle or not. We check nb_cs and not nb_streams as the caller will want
468 * to know if it was the last one after a detach().
469 */
470static int h2_used_streams(struct connection *conn)
471{
472 struct h2c *h2c = conn->ctx;
473
474 return h2c->nb_cs;
475}
476
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100477/* returns the number of concurrent streams available on the connection */
Olivier Houchardd540b362018-11-05 18:37:53 +0100478static int h2_avail_streams(struct connection *conn)
479{
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100480 struct server *srv = objt_server(conn->target);
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100481 struct h2c *h2c = conn->ctx;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100482 int ret1, ret2;
Olivier Houchardd540b362018-11-05 18:37:53 +0100483
Willy Tarreau6afec462019-01-28 06:40:19 +0100484 /* RFC7540#6.8: Receivers of a GOAWAY frame MUST NOT open additional
485 * streams on the connection.
486 */
487 if (h2c->last_sid >= 0)
488 return 0;
489
Willy Tarreau86949782019-01-31 10:42:05 +0100490 /* note: may be negative if a SETTINGS frame changes the limit */
491 ret1 = h2c->streams_limit - h2c->nb_streams;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100492
493 /* we must also consider the limit imposed by stream IDs */
494 ret2 = h2_streams_left(h2c);
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100495 ret1 = MIN(ret1, ret2);
Willy Tarreau86949782019-01-31 10:42:05 +0100496 if (ret1 > 0 && srv && srv->max_reuse >= 0) {
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100497 ret2 = h2c->stream_cnt <= srv->max_reuse ? srv->max_reuse - h2c->stream_cnt + 1: 0;
498 ret1 = MIN(ret1, ret2);
499 }
500 return ret1;
Olivier Houchardd540b362018-11-05 18:37:53 +0100501}
502
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200503
Willy Tarreau62f52692017-10-08 23:01:42 +0200504/*****************************************************************/
505/* functions below are dedicated to the mux setup and management */
506/*****************************************************************/
507
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200508/* Initialize the mux once it's attached. For outgoing connections, the context
509 * is already initialized before installing the mux, so we detect incoming
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200510 * connections from the fact that the context is still NULL (even during mux
511 * upgrades). <input> is always used as Input buffer and may contain data. It is
512 * the caller responsibility to not reuse it anymore. Returns < 0 on error.
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200513 */
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200514static int h2_init(struct connection *conn, struct proxy *prx, struct session *sess,
515 struct buffer *input)
Willy Tarreau32218eb2017-09-22 08:07:25 +0200516{
517 struct h2c *h2c;
Willy Tarreauea392822017-10-31 10:02:25 +0100518 struct task *t = NULL;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200519
Willy Tarreaubafbe012017-11-24 17:34:44 +0100520 h2c = pool_alloc(pool_head_h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200521 if (!h2c)
mildiscd2d7de2018-10-02 16:44:18 +0200522 goto fail_no_h2c;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200523
Christopher Faulete9b70722019-04-08 10:46:02 +0200524 if (conn_is_back(conn)) {
Willy Tarreau01b44822018-10-03 14:26:37 +0200525 h2c->flags = H2_CF_IS_BACK;
526 h2c->shut_timeout = h2c->timeout = prx->timeout.server;
527 if (tick_isset(prx->timeout.serverfin))
528 h2c->shut_timeout = prx->timeout.serverfin;
529 } else {
530 h2c->flags = H2_CF_NONE;
531 h2c->shut_timeout = h2c->timeout = prx->timeout.client;
532 if (tick_isset(prx->timeout.clientfin))
533 h2c->shut_timeout = prx->timeout.clientfin;
534 }
Willy Tarreau3f133572017-10-31 19:21:06 +0100535
Willy Tarreau0b37d652018-10-03 10:33:02 +0200536 h2c->proxy = prx;
Willy Tarreau33400292017-11-05 11:23:40 +0100537 h2c->task = NULL;
Willy Tarreau3f133572017-10-31 19:21:06 +0100538 if (tick_isset(h2c->timeout)) {
539 t = task_new(tid_bit);
540 if (!t)
541 goto fail;
542
543 h2c->task = t;
544 t->process = h2_timeout_task;
545 t->context = h2c;
546 t->expire = tick_add(now_ms, h2c->timeout);
547 }
Willy Tarreauea392822017-10-31 10:02:25 +0100548
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200549 h2c->wait_event.task = tasklet_new();
550 if (!h2c->wait_event.task)
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200551 goto fail;
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200552 h2c->wait_event.task->process = h2_io_cb;
553 h2c->wait_event.task->context = h2c;
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100554 h2c->wait_event.events = 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200555
Willy Tarreau32218eb2017-09-22 08:07:25 +0200556 h2c->ddht = hpack_dht_alloc(h2_settings_header_table_size);
557 if (!h2c->ddht)
558 goto fail;
559
560 /* Initialise the context. */
561 h2c->st0 = H2_CS_PREFACE;
562 h2c->conn = conn;
Willy Tarreau2e2083a2019-01-31 10:34:07 +0100563 h2c->streams_limit = h2_settings_max_concurrent_streams;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200564 h2c->max_id = -1;
565 h2c->errcode = H2_ERR_NO_ERROR;
Willy Tarreau97aaa672018-12-23 09:49:04 +0100566 h2c->rcvd_c = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200567 h2c->rcvd_s = 0;
Willy Tarreau49745612017-12-03 18:56:02 +0100568 h2c->nb_streams = 0;
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200569 h2c->nb_cs = 0;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100570 h2c->nb_reserved = 0;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100571 h2c->stream_cnt = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200572
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200573 h2c->dbuf = *input;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200574 h2c->dsi = -1;
575 h2c->msi = -1;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100576
Willy Tarreau32218eb2017-09-22 08:07:25 +0200577 h2c->last_sid = -1;
578
Willy Tarreau51330962019-05-26 09:38:07 +0200579 br_init(h2c->mbuf, sizeof(h2c->mbuf) / sizeof(h2c->mbuf[0]));
Willy Tarreau32218eb2017-09-22 08:07:25 +0200580 h2c->miw = 65535; /* mux initial window size */
581 h2c->mws = 65535; /* mux window size */
582 h2c->mfs = 16384; /* initial max frame size */
Willy Tarreau751f2d02018-10-05 09:35:00 +0200583 h2c->streams_by_id = EB_ROOT;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200584 LIST_INIT(&h2c->send_list);
585 LIST_INIT(&h2c->fctl_list);
Olivier Houchardd846c262018-10-19 17:24:29 +0200586 LIST_INIT(&h2c->sending_list);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100587 LIST_INIT(&h2c->buf_wait.list);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200588
Willy Tarreau3f133572017-10-31 19:21:06 +0100589 if (t)
590 task_queue(t);
Willy Tarreauea392822017-10-31 10:02:25 +0100591
Willy Tarreau01b44822018-10-03 14:26:37 +0200592 if (h2c->flags & H2_CF_IS_BACK) {
593 /* FIXME: this is temporary, for outgoing connections we need
594 * to immediately allocate a stream until the code is modified
595 * so that the caller calls ->attach(). For now the outgoing cs
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100596 * is stored as conn->ctx by the caller.
Willy Tarreau01b44822018-10-03 14:26:37 +0200597 */
598 struct h2s *h2s;
599
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100600 h2s = h2c_bck_stream_new(h2c, conn->ctx, sess);
Willy Tarreau01b44822018-10-03 14:26:37 +0200601 if (!h2s)
602 goto fail_stream;
603 }
604
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100605 conn->ctx = h2c;
Willy Tarreau01b44822018-10-03 14:26:37 +0200606
Willy Tarreau0f383582018-10-03 14:22:21 +0200607 /* prepare to read something */
Olivier Houchard3ca18bf2019-04-05 15:34:34 +0200608 h2c_restart_reading(h2c, 1);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200609 return 0;
Willy Tarreau01b44822018-10-03 14:26:37 +0200610 fail_stream:
611 hpack_dht_free(h2c->ddht);
mildiscd2d7de2018-10-02 16:44:18 +0200612 fail:
Willy Tarreauf6562792019-05-07 19:05:35 +0200613 task_destroy(t);
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200614 if (h2c->wait_event.task)
615 tasklet_free(h2c->wait_event.task);
Willy Tarreaubafbe012017-11-24 17:34:44 +0100616 pool_free(pool_head_h2c, h2c);
mildiscd2d7de2018-10-02 16:44:18 +0200617 fail_no_h2c:
Willy Tarreau32218eb2017-09-22 08:07:25 +0200618 return -1;
619}
620
Willy Tarreau751f2d02018-10-05 09:35:00 +0200621/* returns the next allocatable outgoing stream ID for the H2 connection, or
622 * -1 if no more is allocatable.
623 */
624static inline int32_t h2c_get_next_sid(const struct h2c *h2c)
625{
626 int32_t id = (h2c->max_id + 1) | 1;
Willy Tarreaua80dca82019-01-24 17:08:28 +0100627
628 if ((id & 0x80000000U) || (h2c->last_sid >= 0 && id > h2c->last_sid))
Willy Tarreau751f2d02018-10-05 09:35:00 +0200629 id = -1;
630 return id;
631}
632
Willy Tarreau2373acc2017-10-12 17:35:14 +0200633/* returns the stream associated with id <id> or NULL if not found */
634static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id)
635{
636 struct eb32_node *node;
637
Willy Tarreau751f2d02018-10-05 09:35:00 +0200638 if (id == 0)
639 return (struct h2s *)h2_closed_stream;
640
Willy Tarreau2a856182017-05-16 15:20:39 +0200641 if (id > h2c->max_id)
642 return (struct h2s *)h2_idle_stream;
643
Willy Tarreau2373acc2017-10-12 17:35:14 +0200644 node = eb32_lookup(&h2c->streams_by_id, id);
645 if (!node)
Willy Tarreau2a856182017-05-16 15:20:39 +0200646 return (struct h2s *)h2_closed_stream;
Willy Tarreau2373acc2017-10-12 17:35:14 +0200647
648 return container_of(node, struct h2s, by_id);
649}
650
Christopher Faulet73c12072019-04-08 11:23:22 +0200651/* release function. This one should be called to free all resources allocated
652 * to the mux.
Willy Tarreau62f52692017-10-08 23:01:42 +0200653 */
Christopher Faulet73c12072019-04-08 11:23:22 +0200654static void h2_release(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +0200655{
Christopher Faulet61840e72019-04-15 09:33:32 +0200656 struct connection *conn = NULL;;
Christopher Faulet39a96ee2019-04-08 10:52:21 +0200657
Willy Tarreau32218eb2017-09-22 08:07:25 +0200658 if (h2c) {
Christopher Faulet61840e72019-04-15 09:33:32 +0200659 /* The connection must be aattached to this mux to be released */
660 if (h2c->conn && h2c->conn->ctx == h2c)
661 conn = h2c->conn;
662
Willy Tarreau32218eb2017-09-22 08:07:25 +0200663 hpack_dht_free(h2c->ddht);
Willy Tarreau14398122017-09-22 14:26:04 +0200664
Willy Tarreau186e96e2019-05-28 17:21:18 +0200665 if (LIST_ADDED(&h2c->buf_wait.list)) {
666 HA_SPIN_LOCK(BUF_WQ_LOCK, &buffer_wq_lock);
667 LIST_DEL(&h2c->buf_wait.list);
668 HA_SPIN_UNLOCK(BUF_WQ_LOCK, &buffer_wq_lock);
669 }
Willy Tarreau14398122017-09-22 14:26:04 +0200670
Willy Tarreau44e973f2018-03-01 17:49:30 +0100671 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreau2e3c0002019-05-26 09:45:23 +0200672 h2_release_mbuf(h2c);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100673
Willy Tarreauea392822017-10-31 10:02:25 +0100674 if (h2c->task) {
Willy Tarreau0975f112018-03-29 15:22:59 +0200675 h2c->task->context = NULL;
676 task_wakeup(h2c->task, TASK_WOKEN_OTHER);
Willy Tarreauea392822017-10-31 10:02:25 +0100677 h2c->task = NULL;
678 }
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200679 if (h2c->wait_event.task)
680 tasklet_free(h2c->wait_event.task);
Olivier Houchard0e079372019-04-15 17:51:16 +0200681 if (h2c->wait_event.events != 0)
Olivier Houcharde179d0e2019-03-21 18:27:17 +0100682 conn->xprt->unsubscribe(conn, conn->xprt_ctx, h2c->wait_event.events,
Olivier Houchard0e079372019-04-15 17:51:16 +0200683 &h2c->wait_event);
Willy Tarreauea392822017-10-31 10:02:25 +0100684
Willy Tarreaubafbe012017-11-24 17:34:44 +0100685 pool_free(pool_head_h2c, h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200686 }
687
Christopher Faulet39a96ee2019-04-08 10:52:21 +0200688 if (conn) {
689 conn->mux = NULL;
690 conn->ctx = NULL;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200691
Christopher Faulet39a96ee2019-04-08 10:52:21 +0200692 conn_stop_tracking(conn);
693 conn_full_close(conn);
694 if (conn->destroy_cb)
695 conn->destroy_cb(conn);
696 conn_free(conn);
697 }
Willy Tarreau62f52692017-10-08 23:01:42 +0200698}
699
700
Willy Tarreau71681172017-10-23 14:39:06 +0200701/******************************************************/
702/* functions below are for the H2 protocol processing */
703/******************************************************/
704
705/* returns the stream if of stream <h2s> or 0 if <h2s> is NULL */
Willy Tarreau1f094672017-11-20 21:27:45 +0100706static inline __maybe_unused int h2s_id(const struct h2s *h2s)
Willy Tarreau71681172017-10-23 14:39:06 +0200707{
708 return h2s ? h2s->id : 0;
709}
710
Willy Tarreau5b5e6872017-09-25 16:17:25 +0200711/* returns true of the mux is currently busy as seen from stream <h2s> */
Willy Tarreau1f094672017-11-20 21:27:45 +0100712static inline __maybe_unused int h2c_mux_busy(const struct h2c *h2c, const struct h2s *h2s)
Willy Tarreau5b5e6872017-09-25 16:17:25 +0200713{
714 if (h2c->msi < 0)
715 return 0;
716
717 if (h2c->msi == h2s_id(h2s))
718 return 0;
719
720 return 1;
721}
722
Willy Tarreau741d6df2017-10-17 08:00:59 +0200723/* marks an error on the connection */
Willy Tarreau1f094672017-11-20 21:27:45 +0100724static inline __maybe_unused void h2c_error(struct h2c *h2c, enum h2_err err)
Willy Tarreau741d6df2017-10-17 08:00:59 +0200725{
726 h2c->errcode = err;
727 h2c->st0 = H2_CS_ERROR;
728}
729
Willy Tarreau175cebb2019-01-24 10:02:24 +0100730/* marks an error on the stream. It may also update an already closed stream
731 * (e.g. to report an error after an RST was received).
732 */
Willy Tarreau1f094672017-11-20 21:27:45 +0100733static inline __maybe_unused void h2s_error(struct h2s *h2s, enum h2_err err)
Willy Tarreau2e43f082017-10-17 08:03:59 +0200734{
Willy Tarreau175cebb2019-01-24 10:02:24 +0100735 if (h2s->id && h2s->st != H2_SS_ERROR) {
Willy Tarreau2e43f082017-10-17 08:03:59 +0200736 h2s->errcode = err;
Willy Tarreau175cebb2019-01-24 10:02:24 +0100737 if (h2s->st < H2_SS_ERROR)
738 h2s->st = H2_SS_ERROR;
Willy Tarreauec988c72018-12-19 18:00:29 +0100739 if (h2s->cs)
740 cs_set_error(h2s->cs);
Willy Tarreau2e43f082017-10-17 08:03:59 +0200741 }
742}
743
Willy Tarreau7e094452018-12-19 18:08:52 +0100744/* attempt to notify the data layer of recv availability */
745static void __maybe_unused h2s_notify_recv(struct h2s *h2s)
746{
747 struct wait_event *sw;
748
749 if (h2s->recv_wait) {
750 sw = h2s->recv_wait;
751 sw->events &= ~SUB_RETRY_RECV;
752 tasklet_wakeup(sw->task);
753 h2s->recv_wait = NULL;
754 }
755}
756
757/* attempt to notify the data layer of send availability */
758static void __maybe_unused h2s_notify_send(struct h2s *h2s)
759{
760 struct wait_event *sw;
761
Willy Tarreauc234ae32019-05-13 17:56:11 +0200762 if (h2s->send_wait && !LIST_ADDED(&h2s->sending_list)) {
Willy Tarreau7e094452018-12-19 18:08:52 +0100763 sw = h2s->send_wait;
764 sw->events &= ~SUB_RETRY_SEND;
Olivier Houchardfd1e96d2019-03-25 14:04:25 +0100765 LIST_ADDQ(&h2s->h2c->sending_list, &h2s->sending_list);
Willy Tarreau7e094452018-12-19 18:08:52 +0100766 tasklet_wakeup(sw->task);
Willy Tarreau7e094452018-12-19 18:08:52 +0100767 }
768}
769
Willy Tarreau8b2757c2018-12-19 17:36:48 +0100770/* alerts the data layer, trying to wake it up by all means, following
771 * this sequence :
772 * - if the h2s' data layer is subscribed to recv, then it's woken up for recv
773 * - if its subscribed to send, then it's woken up for send
774 * - if it was subscribed to neither, its ->wake() callback is called
775 * It is safe to call this function with a closed stream which doesn't have a
776 * conn_stream anymore.
777 */
778static void __maybe_unused h2s_alert(struct h2s *h2s)
779{
780 if (h2s->recv_wait || h2s->send_wait) {
781 h2s_notify_recv(h2s);
782 h2s_notify_send(h2s);
783 }
784 else if (h2s->cs && h2s->cs->data_cb->wake != NULL)
785 h2s->cs->data_cb->wake(h2s->cs);
786}
787
Willy Tarreaue4820742017-07-27 13:37:23 +0200788/* writes the 24-bit frame size <len> at address <frame> */
Willy Tarreau1f094672017-11-20 21:27:45 +0100789static inline __maybe_unused void h2_set_frame_size(void *frame, uint32_t len)
Willy Tarreaue4820742017-07-27 13:37:23 +0200790{
791 uint8_t *out = frame;
792
793 *out = len >> 16;
794 write_n16(out + 1, len);
795}
796
Willy Tarreau54c15062017-10-10 17:10:03 +0200797/* reads <bytes> bytes from buffer <b> starting at relative offset <o> from the
798 * current pointer, dealing with wrapping, and stores the result in <dst>. It's
799 * the caller's responsibility to verify that there are at least <bytes> bytes
Willy Tarreau9c7f2d12018-06-15 11:51:32 +0200800 * available in the buffer's input prior to calling this function. The buffer
801 * is assumed not to hold any output data.
Willy Tarreau54c15062017-10-10 17:10:03 +0200802 */
Willy Tarreau1f094672017-11-20 21:27:45 +0100803static inline __maybe_unused void h2_get_buf_bytes(void *dst, size_t bytes,
Willy Tarreau54c15062017-10-10 17:10:03 +0200804 const struct buffer *b, int o)
805{
Willy Tarreau591d4452018-06-15 17:21:00 +0200806 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 +0200807}
808
Willy Tarreau1f094672017-11-20 21:27:45 +0100809static inline __maybe_unused uint16_t h2_get_n16(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +0200810{
Willy Tarreau591d4452018-06-15 17:21:00 +0200811 return readv_n16(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +0200812}
813
Willy Tarreau1f094672017-11-20 21:27:45 +0100814static inline __maybe_unused uint32_t h2_get_n32(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +0200815{
Willy Tarreau591d4452018-06-15 17:21:00 +0200816 return readv_n32(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +0200817}
818
Willy Tarreau1f094672017-11-20 21:27:45 +0100819static inline __maybe_unused uint64_t h2_get_n64(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +0200820{
Willy Tarreau591d4452018-06-15 17:21:00 +0200821 return readv_n64(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +0200822}
823
824
Willy Tarreaua4428bd2018-12-22 18:11:41 +0100825/* Peeks an H2 frame header from offset <o> of buffer <b> into descriptor <h>.
826 * The algorithm is not obvious. It turns out that H2 headers are neither
827 * aligned nor do they use regular sizes. And to add to the trouble, the buffer
828 * may wrap so each byte read must be checked. The header is formed like this :
Willy Tarreau715d5312017-07-11 15:20:24 +0200829 *
830 * b0 b1 b2 b3 b4 b5..b8
831 * +----------+---------+--------+----+----+----------------------+
832 * |len[23:16]|len[15:8]|len[7:0]|type|flag|sid[31:0] (big endian)|
833 * +----------+---------+--------+----+----+----------------------+
834 *
835 * Here we read a big-endian 64 bit word from h[1]. This way in a single read
836 * we get the sid properly aligned and ordered, and 16 bits of len properly
837 * ordered as well. The type and flags can be extracted using bit shifts from
838 * the word, and only one extra read is needed to fetch len[16:23].
Willy Tarreau9c7f2d12018-06-15 11:51:32 +0200839 * Returns zero if some bytes are missing, otherwise non-zero on success. The
840 * buffer is assumed not to contain any output data.
Willy Tarreau715d5312017-07-11 15:20:24 +0200841 */
Willy Tarreaua4428bd2018-12-22 18:11:41 +0100842static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, int o, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +0200843{
844 uint64_t w;
845
Willy Tarreaua4428bd2018-12-22 18:11:41 +0100846 if (b_data(b) < o + 9)
Willy Tarreau715d5312017-07-11 15:20:24 +0200847 return 0;
848
Willy Tarreaua4428bd2018-12-22 18:11:41 +0100849 w = h2_get_n64(b, o + 1);
850 h->len = *(uint8_t*)b_peek(b, o) << 16;
Willy Tarreau715d5312017-07-11 15:20:24 +0200851 h->sid = w & 0x7FFFFFFF; /* RFC7540#4.1: R bit must be ignored */
852 h->ff = w >> 32;
853 h->ft = w >> 40;
854 h->len += w >> 48;
855 return 1;
856}
857
858/* skip the next 9 bytes corresponding to the frame header possibly parsed by
859 * h2_peek_frame_hdr() above.
860 */
Willy Tarreau1f094672017-11-20 21:27:45 +0100861static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b)
Willy Tarreau715d5312017-07-11 15:20:24 +0200862{
Willy Tarreaue5f12ce2018-06-15 10:28:05 +0200863 b_del(b, 9);
Willy Tarreau715d5312017-07-11 15:20:24 +0200864}
865
866/* same as above, automatically advances the buffer on success */
Willy Tarreau1f094672017-11-20 21:27:45 +0100867static inline __maybe_unused int h2_get_frame_hdr(struct buffer *b, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +0200868{
869 int ret;
870
Willy Tarreaua4428bd2018-12-22 18:11:41 +0100871 ret = h2_peek_frame_hdr(b, 0, h);
Willy Tarreau715d5312017-07-11 15:20:24 +0200872 if (ret > 0)
873 h2_skip_frame_hdr(b);
874 return ret;
875}
876
Willy Tarreau00dd0782018-03-01 16:31:34 +0100877/* marks stream <h2s> as CLOSED and decrement the number of active streams for
878 * its connection if the stream was not yet closed. Please use this exclusively
879 * before closing a stream to ensure stream count is well maintained.
Willy Tarreau91bfdd72017-12-14 12:00:14 +0100880 */
Willy Tarreau00dd0782018-03-01 16:31:34 +0100881static inline void h2s_close(struct h2s *h2s)
Willy Tarreau91bfdd72017-12-14 12:00:14 +0100882{
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100883 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreau91bfdd72017-12-14 12:00:14 +0100884 h2s->h2c->nb_streams--;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100885 if (!h2s->id)
886 h2s->h2c->nb_reserved--;
Willy Tarreaua27db382019-03-25 18:13:16 +0100887 if (h2s->cs) {
Willy Tarreaua27db382019-03-25 18:13:16 +0100888 if (!(h2s->cs->flags & CS_FL_EOS) && !b_data(&h2s->rxbuf))
889 h2s_notify_recv(h2s);
890 }
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100891 }
Willy Tarreau91bfdd72017-12-14 12:00:14 +0100892 h2s->st = H2_SS_CLOSED;
893}
894
Willy Tarreau71049cc2018-03-28 13:56:39 +0200895/* detaches an H2 stream from its H2C and releases it to the H2S pool. */
896static void h2s_destroy(struct h2s *h2s)
Willy Tarreau0a10de62018-03-01 16:27:53 +0100897{
898 h2s_close(h2s);
899 eb32_delete(&h2s->by_id);
Olivier Houchard638b7992018-08-16 15:41:52 +0200900 if (b_size(&h2s->rxbuf)) {
901 b_free(&h2s->rxbuf);
902 offer_buffers(NULL, tasks_run_queue);
903 }
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200904 if (h2s->send_wait != NULL)
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100905 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200906 if (h2s->recv_wait != NULL)
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100907 h2s->recv_wait->events &= ~SUB_RETRY_RECV;
Joseph Herlantd77575d2018-11-25 10:54:45 -0800908 /* There's no need to explicitly call unsubscribe here, the only
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200909 * reference left would be in the h2c send_list/fctl_list, and if
910 * we're in it, we're getting out anyway
911 */
Olivier Houchardd360ac62019-03-22 17:37:16 +0100912 LIST_DEL_INIT(&h2s->list);
Willy Tarreauc234ae32019-05-13 17:56:11 +0200913 if (LIST_ADDED(&h2s->sending_list)) {
Olivier Houchard998410a2019-04-15 19:23:37 +0200914 task_remove_from_tasklet_list((struct task *)h2s->send_wait->task);
915 LIST_DEL_INIT(&h2s->sending_list);
916 }
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200917 tasklet_free(h2s->wait_event.task);
Willy Tarreau0a10de62018-03-01 16:27:53 +0100918 pool_free(pool_head_h2s, h2s);
919}
920
Willy Tarreaua8e49542018-10-03 18:53:55 +0200921/* allocates a new stream <id> for connection <h2c> and adds it into h2c's
922 * stream tree. In case of error, nothing is added and NULL is returned. The
923 * causes of errors can be any failed memory allocation. The caller is
924 * responsible for checking if the connection may support an extra stream
925 * prior to calling this function.
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200926 */
Willy Tarreaua8e49542018-10-03 18:53:55 +0200927static struct h2s *h2s_new(struct h2c *h2c, int id)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200928{
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200929 struct h2s *h2s;
930
Willy Tarreaubafbe012017-11-24 17:34:44 +0100931 h2s = pool_alloc(pool_head_h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200932 if (!h2s)
933 goto out;
934
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200935 h2s->wait_event.task = tasklet_new();
936 if (!h2s->wait_event.task) {
937 pool_free(pool_head_h2s, h2s);
938 goto out;
939 }
940 h2s->send_wait = NULL;
941 h2s->recv_wait = NULL;
942 h2s->wait_event.task->process = h2_deferred_shut;
943 h2s->wait_event.task->context = h2s;
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100944 h2s->wait_event.events = 0;
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200945 LIST_INIT(&h2s->list);
Olivier Houchardd360ac62019-03-22 17:37:16 +0100946 LIST_INIT(&h2s->sending_list);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200947 h2s->h2c = h2c;
Willy Tarreaua8e49542018-10-03 18:53:55 +0200948 h2s->cs = NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200949 h2s->mws = h2c->miw;
950 h2s->flags = H2_SF_NONE;
951 h2s->errcode = H2_ERR_NO_ERROR;
952 h2s->st = H2_SS_IDLE;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +0200953 h2s->status = 0;
Willy Tarreau1915ca22019-01-24 11:49:37 +0100954 h2s->body_len = 0;
Olivier Houchard638b7992018-08-16 15:41:52 +0200955 h2s->rxbuf = BUF_NULL;
Willy Tarreau751f2d02018-10-05 09:35:00 +0200956
957 if (h2c->flags & H2_CF_IS_BACK) {
958 h1m_init_req(&h2s->h1m);
959 h2s->h1m.err_pos = -1; // don't care about errors on the request path
960 h2s->h1m.flags |= H1_MF_TOLOWER;
961 } else {
962 h1m_init_res(&h2s->h1m);
963 h2s->h1m.err_pos = -1; // don't care about errors on the response path
964 h2s->h1m.flags |= H1_MF_TOLOWER;
965 }
966
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200967 h2s->by_id.key = h2s->id = id;
Willy Tarreau751f2d02018-10-05 09:35:00 +0200968 if (id > 0)
969 h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +0100970 else
971 h2c->nb_reserved++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200972
973 eb32_insert(&h2c->streams_by_id, &h2s->by_id);
Willy Tarreau49745612017-12-03 18:56:02 +0100974 h2c->nb_streams++;
Willy Tarreaue9634bd2019-01-23 10:25:10 +0100975 h2c->stream_cnt++;
Willy Tarreaua8e49542018-10-03 18:53:55 +0200976
977 return h2s;
978
979 out_free_h2s:
980 pool_free(pool_head_h2s, h2s);
981 out:
982 return NULL;
983}
984
985/* creates a new stream <id> on the h2c connection and returns it, or NULL in
986 * case of memory allocation error.
987 */
988static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id)
989{
990 struct session *sess = h2c->conn->owner;
991 struct conn_stream *cs;
992 struct h2s *h2s;
993
994 if (h2c->nb_streams >= h2_settings_max_concurrent_streams)
995 goto out;
996
997 h2s = h2s_new(h2c, id);
998 if (!h2s)
999 goto out;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001000
1001 cs = cs_new(h2c->conn);
1002 if (!cs)
1003 goto out_close;
1004
Olivier Houchard746fb772018-12-15 19:42:00 +01001005 cs->flags |= CS_FL_NOT_FIRST;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001006 h2s->cs = cs;
1007 cs->ctx = h2s;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001008 h2c->nb_cs++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001009
1010 if (stream_create_from_cs(cs) < 0)
1011 goto out_free_cs;
1012
Willy Tarreau590a0512018-09-05 11:56:48 +02001013 /* We want the accept date presented to the next stream to be the one
1014 * we have now, the handshake time to be null (since the next stream
1015 * is not delayed by a handshake), and the idle time to count since
1016 * right now.
1017 */
1018 sess->accept_date = date;
1019 sess->tv_accept = now;
1020 sess->t_handshake = 0;
1021
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001022 /* OK done, the stream lives its own life now */
Willy Tarreaufa1d3572019-01-31 10:31:51 +01001023 if (h2_frt_has_too_many_cs(h2c))
Willy Tarreauf2101912018-07-19 10:11:38 +02001024 h2c->flags |= H2_CF_DEM_TOOMANY;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001025 return h2s;
1026
1027 out_free_cs:
Willy Tarreau7ac60e82018-07-19 09:04:05 +02001028 h2c->nb_cs--;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001029 cs_free(cs);
Olivier Houchard58d87f32019-05-29 16:44:17 +02001030 h2s->cs = NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001031 out_close:
Willy Tarreau71049cc2018-03-28 13:56:39 +02001032 h2s_destroy(h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001033 out:
Willy Tarreau45efc072018-10-03 18:27:52 +02001034 sess_log(sess);
1035 return NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +02001036}
1037
Willy Tarreau751f2d02018-10-05 09:35:00 +02001038/* allocates a new stream associated to conn_stream <cs> on the h2c connection
1039 * and returns it, or NULL in case of memory allocation error or if the highest
1040 * possible stream ID was reached.
1041 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01001042static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001043{
1044 struct h2s *h2s = NULL;
1045
Willy Tarreau86949782019-01-31 10:42:05 +01001046 if (h2c->nb_streams >= h2c->streams_limit)
Willy Tarreau751f2d02018-10-05 09:35:00 +02001047 goto out;
1048
Willy Tarreaua80dca82019-01-24 17:08:28 +01001049 if (h2_streams_left(h2c) < 1)
1050 goto out;
1051
Willy Tarreau751f2d02018-10-05 09:35:00 +02001052 /* Defer choosing the ID until we send the first message to create the stream */
1053 h2s = h2s_new(h2c, 0);
1054 if (!h2s)
1055 goto out;
1056
1057 h2s->cs = cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +01001058 h2s->sess = sess;
Willy Tarreau751f2d02018-10-05 09:35:00 +02001059 cs->ctx = h2s;
1060 h2c->nb_cs++;
1061
Willy Tarreau751f2d02018-10-05 09:35:00 +02001062 out:
1063 return h2s;
1064}
1065
Willy Tarreaube5b7152017-09-25 16:25:39 +02001066/* try to send a settings frame on the connection. Returns > 0 on success, 0 if
1067 * it couldn't do anything. It may return an error in h2c. See RFC7540#11.3 for
1068 * the various settings codes.
1069 */
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001070static int h2c_send_settings(struct h2c *h2c)
Willy Tarreaube5b7152017-09-25 16:25:39 +02001071{
1072 struct buffer *res;
1073 char buf_data[100]; // enough for 15 settings
Willy Tarreau83061a82018-07-13 11:56:34 +02001074 struct buffer buf;
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001075 int mfs;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001076 int ret;
1077
1078 if (h2c_mux_busy(h2c, NULL)) {
1079 h2c->flags |= H2_CF_DEM_MBUSY;
1080 return 0;
1081 }
1082
Willy Tarreaube5b7152017-09-25 16:25:39 +02001083 chunk_init(&buf, buf_data, sizeof(buf_data));
1084 chunk_memcpy(&buf,
1085 "\x00\x00\x00" /* length : 0 for now */
1086 "\x04\x00" /* type : 4 (settings), flags : 0 */
1087 "\x00\x00\x00\x00", /* stream ID : 0 */
1088 9);
1089
Willy Tarreau0bbad6b2019-02-26 16:01:52 +01001090 if (h2c->flags & H2_CF_IS_BACK) {
1091 /* send settings_enable_push=0 */
1092 chunk_memcat(&buf, "\x00\x02\x00\x00\x00\x00", 6);
1093 }
1094
Willy Tarreaube5b7152017-09-25 16:25:39 +02001095 if (h2_settings_header_table_size != 4096) {
1096 char str[6] = "\x00\x01"; /* header_table_size */
1097
1098 write_n32(str + 2, h2_settings_header_table_size);
1099 chunk_memcat(&buf, str, 6);
1100 }
1101
1102 if (h2_settings_initial_window_size != 65535) {
1103 char str[6] = "\x00\x04"; /* initial_window_size */
1104
1105 write_n32(str + 2, h2_settings_initial_window_size);
1106 chunk_memcat(&buf, str, 6);
1107 }
1108
1109 if (h2_settings_max_concurrent_streams != 0) {
1110 char str[6] = "\x00\x03"; /* max_concurrent_streams */
1111
1112 /* Note: 0 means "unlimited" for haproxy's config but not for
1113 * the protocol, so never send this value!
1114 */
1115 write_n32(str + 2, h2_settings_max_concurrent_streams);
1116 chunk_memcat(&buf, str, 6);
1117 }
1118
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001119 mfs = h2_settings_max_frame_size;
1120 if (mfs > global.tune.bufsize)
1121 mfs = global.tune.bufsize;
1122
1123 if (!mfs)
1124 mfs = global.tune.bufsize;
1125
1126 if (mfs != 16384) {
Willy Tarreaube5b7152017-09-25 16:25:39 +02001127 char str[6] = "\x00\x05"; /* max_frame_size */
1128
1129 /* note: similarly we could also emit MAX_HEADER_LIST_SIZE to
1130 * match bufsize - rewrite size, but at the moment it seems
1131 * that clients don't take care of it.
1132 */
Willy Tarreaua24b35c2019-02-21 13:24:36 +01001133 write_n32(str + 2, mfs);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001134 chunk_memcat(&buf, str, 6);
1135 }
1136
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001137 h2_set_frame_size(buf.area, buf.data - 9);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001138
1139 res = br_tail(h2c->mbuf);
1140 retry:
1141 if (!h2_get_buf(h2c, res)) {
1142 h2c->flags |= H2_CF_MUX_MALLOC;
1143 h2c->flags |= H2_CF_DEM_MROOM;
1144 return 0;
1145 }
1146
Willy Tarreau843b7cb2018-07-13 10:54:26 +02001147 ret = b_istput(res, ist2(buf.area, buf.data));
Willy Tarreaube5b7152017-09-25 16:25:39 +02001148 if (unlikely(ret <= 0)) {
1149 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001150 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1151 goto retry;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001152 h2c->flags |= H2_CF_MUX_MFULL;
1153 h2c->flags |= H2_CF_DEM_MROOM;
1154 return 0;
1155 }
1156 else {
1157 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1158 return 0;
1159 }
1160 }
1161 return ret;
1162}
1163
Willy Tarreau52eed752017-09-22 15:05:09 +02001164/* Try to receive a connection preface, then upon success try to send our
1165 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1166 * missing data. It may return an error in h2c.
1167 */
1168static int h2c_frt_recv_preface(struct h2c *h2c)
1169{
1170 int ret1;
Willy Tarreaube5b7152017-09-25 16:25:39 +02001171 int ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001172
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001173 ret1 = b_isteq(&h2c->dbuf, 0, b_data(&h2c->dbuf), ist(H2_CONN_PREFACE));
Willy Tarreau52eed752017-09-22 15:05:09 +02001174
1175 if (unlikely(ret1 <= 0)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +02001176 if (ret1 < 0)
1177 sess_log(h2c->conn->owner);
1178
Willy Tarreau52eed752017-09-22 15:05:09 +02001179 if (ret1 < 0 || conn_xprt_read0_pending(h2c->conn))
1180 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
1181 return 0;
1182 }
1183
Willy Tarreau7f0cc492018-10-08 07:13:08 +02001184 ret2 = h2c_send_settings(h2c);
Willy Tarreaube5b7152017-09-25 16:25:39 +02001185 if (ret2 > 0)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001186 b_del(&h2c->dbuf, ret1);
Willy Tarreau52eed752017-09-22 15:05:09 +02001187
Willy Tarreaube5b7152017-09-25 16:25:39 +02001188 return ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +02001189}
1190
Willy Tarreau01b44822018-10-03 14:26:37 +02001191/* Try to send a connection preface, then upon success try to send our
1192 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
1193 * missing data. It may return an error in h2c.
1194 */
1195static int h2c_bck_send_preface(struct h2c *h2c)
1196{
1197 struct buffer *res;
Willy Tarreau9c218e72019-05-26 10:08:28 +02001198 int ret;
Willy Tarreau01b44822018-10-03 14:26:37 +02001199
1200 if (h2c_mux_busy(h2c, NULL)) {
1201 h2c->flags |= H2_CF_DEM_MBUSY;
1202 return 0;
1203 }
1204
Willy Tarreaubcc45952019-05-26 10:05:50 +02001205 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001206 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001207 if (!h2_get_buf(h2c, res)) {
Willy Tarreau01b44822018-10-03 14:26:37 +02001208 h2c->flags |= H2_CF_MUX_MALLOC;
1209 h2c->flags |= H2_CF_DEM_MROOM;
1210 return 0;
1211 }
1212
1213 if (!b_data(res)) {
1214 /* preface not yet sent */
Willy Tarreau9c218e72019-05-26 10:08:28 +02001215 ret = b_istput(res, ist(H2_CONN_PREFACE));
1216 if (unlikely(ret <= 0)) {
1217 if (!ret) {
1218 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1219 goto retry;
1220 h2c->flags |= H2_CF_MUX_MFULL;
1221 h2c->flags |= H2_CF_DEM_MROOM;
1222 return 0;
1223 }
1224 else {
1225 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1226 return 0;
1227 }
1228 }
Willy Tarreau01b44822018-10-03 14:26:37 +02001229 }
Willy Tarreau01b44822018-10-03 14:26:37 +02001230 return h2c_send_settings(h2c);
1231}
1232
Willy Tarreau081d4722017-05-16 21:51:05 +02001233/* try to send a GOAWAY frame on the connection to report an error or a graceful
1234 * shutdown, with h2c->errcode as the error code. Returns > 0 on success or zero
1235 * if nothing was done. It uses h2c->last_sid as the advertised ID, or copies it
1236 * from h2c->max_id if it's not set yet (<0). In case of lack of room to write
1237 * the message, it subscribes the requester (either <h2s> or <h2c>) to future
1238 * notifications. It sets H2_CF_GOAWAY_SENT on success, and H2_CF_GOAWAY_FAILED
1239 * on unrecoverable failure. It will not attempt to send one again in this last
1240 * case so that it is safe to use h2c_error() to report such errors.
1241 */
1242static int h2c_send_goaway_error(struct h2c *h2c, struct h2s *h2s)
1243{
1244 struct buffer *res;
1245 char str[17];
1246 int ret;
1247
1248 if (h2c->flags & H2_CF_GOAWAY_FAILED)
1249 return 1; // claim that it worked
1250
1251 if (h2c_mux_busy(h2c, h2s)) {
1252 if (h2s)
1253 h2s->flags |= H2_SF_BLK_MBUSY;
1254 else
1255 h2c->flags |= H2_CF_DEM_MBUSY;
1256 return 0;
1257 }
1258
Willy Tarreau9c218e72019-05-26 10:08:28 +02001259 /* len: 8, type: 7, flags: none, sid: 0 */
1260 memcpy(str, "\x00\x00\x08\x07\x00\x00\x00\x00\x00", 9);
1261
1262 if (h2c->last_sid < 0)
1263 h2c->last_sid = h2c->max_id;
1264
1265 write_n32(str + 9, h2c->last_sid);
1266 write_n32(str + 13, h2c->errcode);
1267
Willy Tarreaubcc45952019-05-26 10:05:50 +02001268 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001269 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001270 if (!h2_get_buf(h2c, res)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02001271 h2c->flags |= H2_CF_MUX_MALLOC;
1272 if (h2s)
1273 h2s->flags |= H2_SF_BLK_MROOM;
1274 else
1275 h2c->flags |= H2_CF_DEM_MROOM;
1276 return 0;
1277 }
1278
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001279 ret = b_istput(res, ist2(str, 17));
Willy Tarreau081d4722017-05-16 21:51:05 +02001280 if (unlikely(ret <= 0)) {
1281 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001282 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1283 goto retry;
Willy Tarreau081d4722017-05-16 21:51:05 +02001284 h2c->flags |= H2_CF_MUX_MFULL;
1285 if (h2s)
1286 h2s->flags |= H2_SF_BLK_MROOM;
1287 else
1288 h2c->flags |= H2_CF_DEM_MROOM;
1289 return 0;
1290 }
1291 else {
1292 /* we cannot report this error using GOAWAY, so we mark
1293 * it and claim a success.
1294 */
1295 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1296 h2c->flags |= H2_CF_GOAWAY_FAILED;
1297 return 1;
1298 }
1299 }
1300 h2c->flags |= H2_CF_GOAWAY_SENT;
1301 return ret;
1302}
1303
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001304/* Try to send an RST_STREAM frame on the connection for the indicated stream
1305 * during mux operations. This stream must be valid and cannot be closed
1306 * already. h2s->id will be used for the stream ID and h2s->errcode will be
1307 * used for the error code. h2s->st will be update to H2_SS_CLOSED if it was
1308 * not yet.
1309 *
1310 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1311 * to write the message, it subscribes the stream to future notifications.
1312 */
1313static int h2s_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1314{
1315 struct buffer *res;
1316 char str[13];
1317 int ret;
1318
1319 if (!h2s || h2s->st == H2_SS_CLOSED)
1320 return 1;
1321
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001322 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1323 * RST_STREAM in response to a RST_STREAM frame.
1324 */
1325 if (h2c->dft == H2_FT_RST_STREAM) {
1326 ret = 1;
1327 goto ignore;
1328 }
1329
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001330 if (h2c_mux_busy(h2c, h2s)) {
1331 h2s->flags |= H2_SF_BLK_MBUSY;
1332 return 0;
1333 }
1334
Willy Tarreau9c218e72019-05-26 10:08:28 +02001335 /* len: 4, type: 3, flags: none */
1336 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1337 write_n32(str + 5, h2s->id);
1338 write_n32(str + 9, h2s->errcode);
1339
Willy Tarreaubcc45952019-05-26 10:05:50 +02001340 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001341 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001342 if (!h2_get_buf(h2c, res)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001343 h2c->flags |= H2_CF_MUX_MALLOC;
1344 h2s->flags |= H2_SF_BLK_MROOM;
1345 return 0;
1346 }
1347
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001348 ret = b_istput(res, ist2(str, 13));
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001349 if (unlikely(ret <= 0)) {
1350 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001351 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1352 goto retry;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001353 h2c->flags |= H2_CF_MUX_MFULL;
1354 h2s->flags |= H2_SF_BLK_MROOM;
1355 return 0;
1356 }
1357 else {
1358 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1359 return 0;
1360 }
1361 }
1362
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001363 ignore:
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001364 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001365 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001366 return ret;
1367}
1368
1369/* Try to send an RST_STREAM frame on the connection for the stream being
1370 * demuxed using h2c->dsi for the stream ID. It will use h2s->errcode as the
Willy Tarreaue6888ff2018-12-23 18:26:26 +01001371 * error code, even if the stream is one of the dummy ones, and will update
1372 * h2s->st to H2_SS_CLOSED if it was not yet.
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001373 *
1374 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1375 * to write the message, it blocks the demuxer and subscribes it to future
Joseph Herlantd77575d2018-11-25 10:54:45 -08001376 * notifications. It's worth mentioning that an RST may even be sent for a
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001377 * closed stream.
Willy Tarreau27a84c92017-10-17 08:10:17 +02001378 */
1379static int h2c_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1380{
1381 struct buffer *res;
1382 char str[13];
1383 int ret;
1384
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001385 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1386 * RST_STREAM in response to a RST_STREAM frame.
1387 */
1388 if (h2c->dft == H2_FT_RST_STREAM) {
1389 ret = 1;
1390 goto ignore;
1391 }
1392
Willy Tarreau27a84c92017-10-17 08:10:17 +02001393 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001394 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001395 return 0;
1396 }
1397
Willy Tarreau9c218e72019-05-26 10:08:28 +02001398 /* len: 4, type: 3, flags: none */
1399 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1400
1401 write_n32(str + 5, h2c->dsi);
1402 write_n32(str + 9, h2s->errcode);
1403
Willy Tarreaubcc45952019-05-26 10:05:50 +02001404 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001405 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001406 if (!h2_get_buf(h2c, res)) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02001407 h2c->flags |= H2_CF_MUX_MALLOC;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001408 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001409 return 0;
1410 }
1411
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001412 ret = b_istput(res, ist2(str, 13));
Willy Tarreau27a84c92017-10-17 08:10:17 +02001413 if (unlikely(ret <= 0)) {
1414 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001415 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1416 goto retry;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001417 h2c->flags |= H2_CF_MUX_MFULL;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001418 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001419 return 0;
1420 }
1421 else {
1422 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1423 return 0;
1424 }
1425 }
1426
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001427 ignore:
Willy Tarreauab0e1da2018-10-05 10:16:37 +02001428 if (h2s->id) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02001429 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001430 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001431 }
1432
Willy Tarreau27a84c92017-10-17 08:10:17 +02001433 return ret;
1434}
1435
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001436/* try to send an empty DATA frame with the ES flag set to notify about the
1437 * end of stream and match a shutdown(write). If an ES was already sent as
1438 * indicated by HLOC/ERROR/RESET/CLOSED states, nothing is done. Returns > 0
1439 * on success or zero if nothing was done. In case of lack of room to write the
1440 * message, it subscribes the requesting stream to future notifications.
1441 */
1442static int h2_send_empty_data_es(struct h2s *h2s)
1443{
1444 struct h2c *h2c = h2s->h2c;
1445 struct buffer *res;
1446 char str[9];
1447 int ret;
1448
Willy Tarreau721c9742017-11-07 11:05:42 +01001449 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED)
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001450 return 1;
1451
1452 if (h2c_mux_busy(h2c, h2s)) {
1453 h2s->flags |= H2_SF_BLK_MBUSY;
1454 return 0;
1455 }
1456
Willy Tarreau9c218e72019-05-26 10:08:28 +02001457 /* len: 0x000000, type: 0(DATA), flags: ES=1 */
1458 memcpy(str, "\x00\x00\x00\x00\x01", 5);
1459 write_n32(str + 5, h2s->id);
1460
Willy Tarreaubcc45952019-05-26 10:05:50 +02001461 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001462 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001463 if (!h2_get_buf(h2c, res)) {
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001464 h2c->flags |= H2_CF_MUX_MALLOC;
1465 h2s->flags |= H2_SF_BLK_MROOM;
1466 return 0;
1467 }
1468
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001469 ret = b_istput(res, ist2(str, 9));
Willy Tarreau6d8b6822017-11-07 14:39:09 +01001470 if (likely(ret > 0)) {
1471 h2s->flags |= H2_SF_ES_SENT;
1472 }
1473 else if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001474 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1475 goto retry;
Willy Tarreau6d8b6822017-11-07 14:39:09 +01001476 h2c->flags |= H2_CF_MUX_MFULL;
1477 h2s->flags |= H2_SF_BLK_MROOM;
1478 return 0;
1479 }
1480 else {
1481 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1482 return 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001483 }
1484 return ret;
1485}
1486
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001487/* wake a specific stream and assign its conn_stream som CS_FL_* flags among
Willy Tarreau99ad1b32019-05-14 11:46:28 +02001488 * CS_FL_ERR_PENDING and CS_FL_ERROR if needed. The stream's state
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001489 * is automatically updated accordingly. If the stream is orphaned, it is
1490 * destroyed.
Christopher Fauletf02ca002019-03-07 16:21:34 +01001491 */
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001492static void h2s_wake_one_stream(struct h2s *h2s)
Christopher Fauletf02ca002019-03-07 16:21:34 +01001493{
1494 if (!h2s->cs) {
1495 /* this stream was already orphaned */
1496 h2s_destroy(h2s);
1497 return;
1498 }
1499
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001500 if (conn_xprt_read0_pending(h2s->h2c->conn)) {
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001501 if (h2s->st == H2_SS_OPEN)
1502 h2s->st = H2_SS_HREM;
1503 else if (h2s->st == H2_SS_HLOC)
1504 h2s_close(h2s);
1505 }
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001506
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001507 if ((h2s->h2c->st0 >= H2_CS_ERROR || h2s->h2c->conn->flags & CO_FL_ERROR) ||
1508 (h2s->h2c->last_sid > 0 && (!h2s->id || h2s->id > h2s->h2c->last_sid))) {
1509 h2s->cs->flags |= CS_FL_ERR_PENDING;
1510 if (h2s->cs->flags & CS_FL_EOS)
1511 h2s->cs->flags |= CS_FL_ERROR;
Willy Tarreau23482912019-05-07 15:23:14 +02001512
Willy Tarreauaebbe5e2019-05-07 17:48:59 +02001513 if (h2s->st < H2_SS_ERROR)
1514 h2s->st = H2_SS_ERROR;
1515 }
Christopher Fauletf02ca002019-03-07 16:21:34 +01001516
1517 h2s_alert(h2s);
Christopher Fauletf02ca002019-03-07 16:21:34 +01001518}
1519
1520/* wake the streams attached to the connection, whose id is greater than <last>
1521 * or unassigned.
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001522 */
Willy Tarreau23482912019-05-07 15:23:14 +02001523static void h2_wake_some_streams(struct h2c *h2c, int last)
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001524{
1525 struct eb32_node *node;
1526 struct h2s *h2s;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001527
Christopher Fauletf02ca002019-03-07 16:21:34 +01001528 /* Wake all streams with ID > last */
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001529 node = eb32_lookup_ge(&h2c->streams_by_id, last + 1);
1530 while (node) {
1531 h2s = container_of(node, struct h2s, by_id);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001532 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001533 h2s_wake_one_stream(h2s);
Christopher Fauletf02ca002019-03-07 16:21:34 +01001534 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01001535
Christopher Fauletf02ca002019-03-07 16:21:34 +01001536 /* Wake all streams with unassigned ID (ID == 0) */
1537 node = eb32_lookup(&h2c->streams_by_id, 0);
1538 while (node) {
1539 h2s = container_of(node, struct h2s, by_id);
1540 if (h2s->id > 0)
1541 break;
1542 node = eb32_next(node);
Willy Tarreau13b6c2e2019-05-07 17:26:05 +02001543 h2s_wake_one_stream(h2s);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001544 }
1545}
1546
Willy Tarreau3421aba2017-07-27 15:41:03 +02001547/* Increase all streams' outgoing window size by the difference passed in
1548 * argument. This is needed upon receipt of the settings frame if the initial
1549 * window size is different. The difference may be negative and the resulting
1550 * window size as well, for the time it takes to receive some window updates.
1551 */
1552static void h2c_update_all_ws(struct h2c *h2c, int diff)
1553{
1554 struct h2s *h2s;
1555 struct eb32_node *node;
1556
1557 if (!diff)
1558 return;
1559
1560 node = eb32_first(&h2c->streams_by_id);
1561 while (node) {
1562 h2s = container_of(node, struct h2s, by_id);
1563 h2s->mws += diff;
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01001564
1565 if (h2s->mws > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) {
1566 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreauc234ae32019-05-13 17:56:11 +02001567 if (h2s->send_wait && !LIST_ADDED(&h2s->list))
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01001568 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreaub1c9edc2019-01-30 16:11:20 +01001569 }
1570
Willy Tarreau3421aba2017-07-27 15:41:03 +02001571 node = eb32_next(node);
1572 }
1573}
1574
1575/* processes a SETTINGS frame whose payload is <payload> for <plen> bytes, and
1576 * ACKs it if needed. Returns > 0 on success or zero on missing data. It may
Willy Tarreaub860c732019-01-30 15:39:55 +01001577 * return an error in h2c. The caller must have already verified frame length
1578 * and stream ID validity. Described in RFC7540#6.5.
Willy Tarreau3421aba2017-07-27 15:41:03 +02001579 */
1580static int h2c_handle_settings(struct h2c *h2c)
1581{
1582 unsigned int offset;
1583 int error;
1584
1585 if (h2c->dff & H2_F_SETTINGS_ACK) {
1586 if (h2c->dfl) {
1587 error = H2_ERR_FRAME_SIZE_ERROR;
1588 goto fail;
1589 }
1590 return 1;
1591 }
1592
Willy Tarreau3421aba2017-07-27 15:41:03 +02001593 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001594 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau3421aba2017-07-27 15:41:03 +02001595 return 0;
1596
1597 /* parse the frame */
1598 for (offset = 0; offset < h2c->dfl; offset += 6) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001599 uint16_t type = h2_get_n16(&h2c->dbuf, offset);
1600 int32_t arg = h2_get_n32(&h2c->dbuf, offset + 2);
Willy Tarreau3421aba2017-07-27 15:41:03 +02001601
1602 switch (type) {
1603 case H2_SETTINGS_INITIAL_WINDOW_SIZE:
1604 /* we need to update all existing streams with the
1605 * difference from the previous iws.
1606 */
1607 if (arg < 0) { // RFC7540#6.5.2
1608 error = H2_ERR_FLOW_CONTROL_ERROR;
1609 goto fail;
1610 }
1611 h2c_update_all_ws(h2c, arg - h2c->miw);
1612 h2c->miw = arg;
1613 break;
1614 case H2_SETTINGS_MAX_FRAME_SIZE:
1615 if (arg < 16384 || arg > 16777215) { // RFC7540#6.5.2
1616 error = H2_ERR_PROTOCOL_ERROR;
1617 goto fail;
1618 }
1619 h2c->mfs = arg;
1620 break;
Willy Tarreau1b38b462017-12-03 19:02:28 +01001621 case H2_SETTINGS_ENABLE_PUSH:
1622 if (arg < 0 || arg > 1) { // RFC7540#6.5.2
1623 error = H2_ERR_PROTOCOL_ERROR;
1624 goto fail;
1625 }
1626 break;
Willy Tarreau2e2083a2019-01-31 10:34:07 +01001627 case H2_SETTINGS_MAX_CONCURRENT_STREAMS:
1628 if (h2c->flags & H2_CF_IS_BACK) {
1629 /* the limit is only for the backend; for the frontend it is our limit */
1630 if ((unsigned int)arg > h2_settings_max_concurrent_streams)
1631 arg = h2_settings_max_concurrent_streams;
1632 h2c->streams_limit = arg;
1633 }
1634 break;
Willy Tarreau3421aba2017-07-27 15:41:03 +02001635 }
1636 }
1637
1638 /* need to ACK this frame now */
1639 h2c->st0 = H2_CS_FRAME_A;
1640 return 1;
1641 fail:
Willy Tarreau22de8d32018-09-05 19:55:58 +02001642 sess_log(h2c->conn->owner);
Willy Tarreau3421aba2017-07-27 15:41:03 +02001643 h2c_error(h2c, error);
1644 return 0;
1645}
1646
1647/* try to send an ACK for a settings frame on the connection. Returns > 0 on
1648 * success or one of the h2_status values.
1649 */
1650static int h2c_ack_settings(struct h2c *h2c)
1651{
1652 struct buffer *res;
1653 char str[9];
1654 int ret = -1;
1655
1656 if (h2c_mux_busy(h2c, NULL)) {
1657 h2c->flags |= H2_CF_DEM_MBUSY;
1658 return 0;
1659 }
1660
Willy Tarreau9c218e72019-05-26 10:08:28 +02001661 memcpy(str,
1662 "\x00\x00\x00" /* length : 0 (no data) */
1663 "\x04" "\x01" /* type : 4, flags : ACK */
1664 "\x00\x00\x00\x00" /* stream ID */, 9);
1665
Willy Tarreaubcc45952019-05-26 10:05:50 +02001666 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001667 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001668 if (!h2_get_buf(h2c, res)) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02001669 h2c->flags |= H2_CF_MUX_MALLOC;
1670 h2c->flags |= H2_CF_DEM_MROOM;
1671 return 0;
1672 }
1673
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001674 ret = b_istput(res, ist2(str, 9));
Willy Tarreau3421aba2017-07-27 15:41:03 +02001675 if (unlikely(ret <= 0)) {
1676 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001677 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1678 goto retry;
Willy Tarreau3421aba2017-07-27 15:41:03 +02001679 h2c->flags |= H2_CF_MUX_MFULL;
1680 h2c->flags |= H2_CF_DEM_MROOM;
1681 return 0;
1682 }
1683 else {
1684 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1685 return 0;
1686 }
1687 }
1688 return ret;
1689}
1690
Willy Tarreaucf68c782017-10-10 17:11:41 +02001691/* processes a PING frame and schedules an ACK if needed. The caller must pass
1692 * the pointer to the payload in <payload>. Returns > 0 on success or zero on
Willy Tarreaub860c732019-01-30 15:39:55 +01001693 * missing data. The caller must have already verified frame length
1694 * and stream ID validity.
Willy Tarreaucf68c782017-10-10 17:11:41 +02001695 */
1696static int h2c_handle_ping(struct h2c *h2c)
1697{
Willy Tarreaucf68c782017-10-10 17:11:41 +02001698 /* schedule a response */
Willy Tarreau68ed6412017-12-03 18:15:56 +01001699 if (!(h2c->dff & H2_F_PING_ACK))
Willy Tarreaucf68c782017-10-10 17:11:41 +02001700 h2c->st0 = H2_CS_FRAME_A;
1701 return 1;
1702}
1703
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02001704/* Try to send a window update for stream id <sid> and value <increment>.
1705 * Returns > 0 on success or zero on missing room or failure. It may return an
1706 * error in h2c.
1707 */
1708static int h2c_send_window_update(struct h2c *h2c, int sid, uint32_t increment)
1709{
1710 struct buffer *res;
1711 char str[13];
1712 int ret = -1;
1713
1714 if (h2c_mux_busy(h2c, NULL)) {
1715 h2c->flags |= H2_CF_DEM_MBUSY;
1716 return 0;
1717 }
1718
Willy Tarreau9c218e72019-05-26 10:08:28 +02001719 /* length: 4, type: 8, flags: none */
1720 memcpy(str, "\x00\x00\x04\x08\x00", 5);
1721 write_n32(str + 5, sid);
1722 write_n32(str + 9, increment);
1723
Willy Tarreaubcc45952019-05-26 10:05:50 +02001724 res = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02001725 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02001726 if (!h2_get_buf(h2c, res)) {
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02001727 h2c->flags |= H2_CF_MUX_MALLOC;
1728 h2c->flags |= H2_CF_DEM_MROOM;
1729 return 0;
1730 }
1731
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001732 ret = b_istput(res, ist2(str, 13));
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02001733 if (unlikely(ret <= 0)) {
1734 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001735 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1736 goto retry;
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02001737 h2c->flags |= H2_CF_MUX_MFULL;
1738 h2c->flags |= H2_CF_DEM_MROOM;
1739 return 0;
1740 }
1741 else {
1742 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1743 return 0;
1744 }
1745 }
1746 return ret;
1747}
1748
1749/* try to send pending window update for the connection. It's safe to call it
1750 * with no pending updates. Returns > 0 on success or zero on missing room or
1751 * failure. It may return an error in h2c.
1752 */
1753static int h2c_send_conn_wu(struct h2c *h2c)
1754{
1755 int ret = 1;
1756
1757 if (h2c->rcvd_c <= 0)
1758 return 1;
1759
Willy Tarreau97aaa672018-12-23 09:49:04 +01001760 if (!(h2c->flags & H2_CF_WINDOW_OPENED)) {
1761 /* increase the advertised connection window to 2G on
1762 * first update.
1763 */
1764 h2c->flags |= H2_CF_WINDOW_OPENED;
1765 h2c->rcvd_c += H2_INITIAL_WINDOW_INCREMENT;
1766 }
1767
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02001768 /* send WU for the connection */
1769 ret = h2c_send_window_update(h2c, 0, h2c->rcvd_c);
1770 if (ret > 0)
1771 h2c->rcvd_c = 0;
1772
1773 return ret;
1774}
1775
1776/* try to send pending window update for the current dmux stream. It's safe to
1777 * call it with no pending updates. Returns > 0 on success or zero on missing
1778 * room or failure. It may return an error in h2c.
1779 */
1780static int h2c_send_strm_wu(struct h2c *h2c)
1781{
1782 int ret = 1;
1783
1784 if (h2c->rcvd_s <= 0)
1785 return 1;
1786
1787 /* send WU for the stream */
1788 ret = h2c_send_window_update(h2c, h2c->dsi, h2c->rcvd_s);
1789 if (ret > 0)
1790 h2c->rcvd_s = 0;
1791
1792 return ret;
1793}
1794
Willy Tarreaucf68c782017-10-10 17:11:41 +02001795/* try to send an ACK for a ping frame on the connection. Returns > 0 on
1796 * success, 0 on missing data or one of the h2_status values.
1797 */
1798static int h2c_ack_ping(struct h2c *h2c)
1799{
1800 struct buffer *res;
1801 char str[17];
1802 int ret = -1;
1803
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001804 if (b_data(&h2c->dbuf) < 8)
Willy Tarreaucf68c782017-10-10 17:11:41 +02001805 return 0;
1806
1807 if (h2c_mux_busy(h2c, NULL)) {
1808 h2c->flags |= H2_CF_DEM_MBUSY;
1809 return 0;
1810 }
1811
Willy Tarreaucf68c782017-10-10 17:11:41 +02001812 memcpy(str,
1813 "\x00\x00\x08" /* length : 8 (same payload) */
1814 "\x06" "\x01" /* type : 6, flags : ACK */
1815 "\x00\x00\x00\x00" /* stream ID */, 9);
1816
1817 /* copy the original payload */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001818 h2_get_buf_bytes(str + 9, 8, &h2c->dbuf, 0);
Willy Tarreaucf68c782017-10-10 17:11:41 +02001819
Willy Tarreau9c218e72019-05-26 10:08:28 +02001820 res = br_tail(h2c->mbuf);
1821 retry:
1822 if (!h2_get_buf(h2c, res)) {
1823 h2c->flags |= H2_CF_MUX_MALLOC;
1824 h2c->flags |= H2_CF_DEM_MROOM;
1825 return 0;
1826 }
1827
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001828 ret = b_istput(res, ist2(str, 17));
Willy Tarreaucf68c782017-10-10 17:11:41 +02001829 if (unlikely(ret <= 0)) {
1830 if (!ret) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02001831 if ((res = br_tail_add(h2c->mbuf)) != NULL)
1832 goto retry;
Willy Tarreaucf68c782017-10-10 17:11:41 +02001833 h2c->flags |= H2_CF_MUX_MFULL;
1834 h2c->flags |= H2_CF_DEM_MROOM;
1835 return 0;
1836 }
1837 else {
1838 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1839 return 0;
1840 }
1841 }
1842 return ret;
1843}
1844
Willy Tarreau26f95952017-07-27 17:18:30 +02001845/* processes a WINDOW_UPDATE frame whose payload is <payload> for <plen> bytes.
1846 * Returns > 0 on success or zero on missing data. It may return an error in
Willy Tarreaub860c732019-01-30 15:39:55 +01001847 * h2c or h2s. The caller must have already verified frame length and stream ID
1848 * validity. Described in RFC7540#6.9.
Willy Tarreau26f95952017-07-27 17:18:30 +02001849 */
1850static int h2c_handle_window_update(struct h2c *h2c, struct h2s *h2s)
1851{
1852 int32_t inc;
1853 int error;
1854
Willy Tarreau26f95952017-07-27 17:18:30 +02001855 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001856 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau26f95952017-07-27 17:18:30 +02001857 return 0;
1858
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001859 inc = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau26f95952017-07-27 17:18:30 +02001860
1861 if (h2c->dsi != 0) {
1862 /* stream window update */
Willy Tarreau26f95952017-07-27 17:18:30 +02001863
1864 /* it's not an error to receive WU on a closed stream */
1865 if (h2s->st == H2_SS_CLOSED)
1866 return 1;
1867
1868 if (!inc) {
1869 error = H2_ERR_PROTOCOL_ERROR;
1870 goto strm_err;
1871 }
1872
1873 if (h2s->mws >= 0 && h2s->mws + inc < 0) {
1874 error = H2_ERR_FLOW_CONTROL_ERROR;
1875 goto strm_err;
1876 }
1877
1878 h2s->mws += inc;
1879 if (h2s->mws > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) {
1880 h2s->flags &= ~H2_SF_BLK_SFCTL;
Willy Tarreauc234ae32019-05-13 17:56:11 +02001881 if (h2s->send_wait && !LIST_ADDED(&h2s->list))
Olivier Houcharddddfe312018-10-10 18:51:00 +02001882 LIST_ADDQ(&h2c->send_list, &h2s->list);
Willy Tarreau26f95952017-07-27 17:18:30 +02001883 }
1884 }
1885 else {
1886 /* connection window update */
1887 if (!inc) {
1888 error = H2_ERR_PROTOCOL_ERROR;
1889 goto conn_err;
1890 }
1891
1892 if (h2c->mws >= 0 && h2c->mws + inc < 0) {
1893 error = H2_ERR_FLOW_CONTROL_ERROR;
1894 goto conn_err;
1895 }
1896
1897 h2c->mws += inc;
1898 }
1899
1900 return 1;
1901
1902 conn_err:
1903 h2c_error(h2c, error);
1904 return 0;
1905
1906 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01001907 h2s_error(h2s, error);
1908 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau26f95952017-07-27 17:18:30 +02001909 return 0;
1910}
1911
Willy Tarreaue96b0922017-10-30 00:28:29 +01001912/* processes a GOAWAY frame, and signals all streams whose ID is greater than
Willy Tarreaub860c732019-01-30 15:39:55 +01001913 * the last ID. Returns > 0 on success or zero on missing data. The caller must
1914 * have already verified frame length and stream ID validity. Described in
1915 * RFC7540#6.8.
Willy Tarreaue96b0922017-10-30 00:28:29 +01001916 */
1917static int h2c_handle_goaway(struct h2c *h2c)
1918{
Willy Tarreaue96b0922017-10-30 00:28:29 +01001919 int last;
1920
Willy Tarreaue96b0922017-10-30 00:28:29 +01001921 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001922 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreaue96b0922017-10-30 00:28:29 +01001923 return 0;
1924
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001925 last = h2_get_n32(&h2c->dbuf, 0);
1926 h2c->errcode = h2_get_n32(&h2c->dbuf, 4);
Willy Tarreau11cc2d62017-12-03 10:27:47 +01001927 if (h2c->last_sid < 0)
1928 h2c->last_sid = last;
Willy Tarreau23482912019-05-07 15:23:14 +02001929 h2_wake_some_streams(h2c, last);
Willy Tarreaue96b0922017-10-30 00:28:29 +01001930 return 1;
Willy Tarreaue96b0922017-10-30 00:28:29 +01001931}
1932
Willy Tarreau92153fc2017-12-03 19:46:19 +01001933/* processes a PRIORITY frame, and either skips it or rejects if it is
Willy Tarreaub860c732019-01-30 15:39:55 +01001934 * invalid. Returns > 0 on success or zero on missing data. It may return an
1935 * error in h2c. The caller must have already verified frame length and stream
1936 * ID validity. Described in RFC7540#6.3.
Willy Tarreau92153fc2017-12-03 19:46:19 +01001937 */
1938static int h2c_handle_priority(struct h2c *h2c)
1939{
Willy Tarreau92153fc2017-12-03 19:46:19 +01001940 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001941 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau92153fc2017-12-03 19:46:19 +01001942 return 0;
1943
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001944 if (h2_get_n32(&h2c->dbuf, 0) == h2c->dsi) {
Willy Tarreau92153fc2017-12-03 19:46:19 +01001945 /* 7540#5.3 : can't depend on itself */
Willy Tarreaub860c732019-01-30 15:39:55 +01001946 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
1947 return 0;
Willy Tarreau92153fc2017-12-03 19:46:19 +01001948 }
1949 return 1;
Willy Tarreau92153fc2017-12-03 19:46:19 +01001950}
1951
Willy Tarreaucd234e92017-08-18 10:59:39 +02001952/* processes an RST_STREAM frame, and sets the 32-bit error code on the stream.
Willy Tarreaub860c732019-01-30 15:39:55 +01001953 * Returns > 0 on success or zero on missing data. The caller must have already
1954 * verified frame length and stream ID validity. Described in RFC7540#6.4.
Willy Tarreaucd234e92017-08-18 10:59:39 +02001955 */
1956static int h2c_handle_rst_stream(struct h2c *h2c, struct h2s *h2s)
1957{
Willy Tarreaucd234e92017-08-18 10:59:39 +02001958 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001959 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreaucd234e92017-08-18 10:59:39 +02001960 return 0;
1961
1962 /* late RST, already handled */
1963 if (h2s->st == H2_SS_CLOSED)
1964 return 1;
1965
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001966 h2s->errcode = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau00dd0782018-03-01 16:31:34 +01001967 h2s_close(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02001968
1969 if (h2s->cs) {
Willy Tarreauec988c72018-12-19 18:00:29 +01001970 cs_set_error(h2s->cs);
Willy Tarreauf830f012018-12-19 17:44:55 +01001971 h2s_alert(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02001972 }
1973
1974 h2s->flags |= H2_SF_RST_RCVD;
1975 return 1;
Willy Tarreaucd234e92017-08-18 10:59:39 +02001976}
1977
Willy Tarreau2a761dc2018-02-26 18:50:57 +01001978/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
1979 * It may return an error in h2c or h2s. The caller must consider that the
1980 * return value is the new h2s in case one was allocated (most common case).
1981 * Described in RFC7540#6.2. Most of the
Willy Tarreau13278b42017-10-13 19:23:14 +02001982 * errors here are reported as connection errors since it's impossible to
1983 * recover from such errors after the compression context has been altered.
1984 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01001985static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau13278b42017-10-13 19:23:14 +02001986{
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01001987 struct buffer rxbuf = BUF_NULL;
Willy Tarreau4790f7c2019-01-24 11:33:02 +01001988 unsigned long long body_len = 0;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01001989 uint32_t flags = 0;
Willy Tarreau13278b42017-10-13 19:23:14 +02001990 int error;
1991
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001992 if (!b_size(&h2c->dbuf))
Willy Tarreau2a761dc2018-02-26 18:50:57 +01001993 return NULL; // empty buffer
Willy Tarreau13278b42017-10-13 19:23:14 +02001994
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001995 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau2a761dc2018-02-26 18:50:57 +01001996 return NULL; // incomplete frame
Willy Tarreau13278b42017-10-13 19:23:14 +02001997
1998 /* now either the frame is complete or the buffer is complete */
1999 if (h2s->st != H2_SS_IDLE) {
Willy Tarreau88d138e2019-01-02 19:38:14 +01002000 /* The stream exists/existed, this must be a trailers frame */
2001 if (h2s->st != H2_SS_CLOSED) {
Willy Tarreauaab1a602019-05-06 11:12:18 +02002002 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &body_len);
2003 /* unrecoverable error ? */
2004 if (h2c->st0 >= H2_CS_ERROR)
2005 goto out;
2006
2007 if (error == 0)
2008 goto out; // missing data
2009
2010 if (error < 0) {
2011 /* Failed to decode this frame (e.g. too large request)
2012 * but the HPACK decompressor is still synchronized.
2013 */
2014 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
2015 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau88d138e2019-01-02 19:38:14 +01002016 goto out;
Willy Tarreauaab1a602019-05-06 11:12:18 +02002017 }
Willy Tarreau88d138e2019-01-02 19:38:14 +01002018 goto done;
2019 }
Willy Tarreau1f035502019-01-30 11:44:07 +01002020 /* the connection was already killed by an RST, let's consume
2021 * the data and send another RST.
2022 */
2023 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
2024 h2s = (struct h2s*)h2_error_stream;
2025 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002026 }
2027 else if (h2c->dsi <= h2c->max_id || !(h2c->dsi & 1)) {
2028 /* RFC7540#5.1.1 stream id > prev ones, and must be odd here */
2029 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002030 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02002031 goto conn_err;
2032 }
Willy Tarreau415b1ee2019-01-02 13:59:43 +01002033 else if (h2c->flags & H2_CF_DEM_TOOMANY)
2034 goto out; // IDLE but too many cs still present
Willy Tarreau13278b42017-10-13 19:23:14 +02002035
Willy Tarreau4790f7c2019-01-24 11:33:02 +01002036 error = h2c_decode_headers(h2c, &rxbuf, &flags, &body_len);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002037
Willy Tarreau25919232019-01-03 14:48:18 +01002038 /* unrecoverable error ? */
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002039 if (h2c->st0 >= H2_CS_ERROR)
2040 goto out;
2041
Willy Tarreau25919232019-01-03 14:48:18 +01002042 if (error <= 0) {
2043 if (error == 0)
2044 goto out; // missing data
2045
2046 /* Failed to decode this stream (e.g. too large request)
2047 * but the HPACK decompressor is still synchronized.
2048 */
2049 h2s = (struct h2s*)h2_error_stream;
2050 goto send_rst;
2051 }
2052
Willy Tarreau22de8d32018-09-05 19:55:58 +02002053 /* Note: we don't emit any other logs below because ff we return
Willy Tarreaua8e49542018-10-03 18:53:55 +02002054 * positively from h2c_frt_stream_new(), the stream will report the error,
2055 * and if we return in error, h2c_frt_stream_new() will emit the error.
Willy Tarreau22de8d32018-09-05 19:55:58 +02002056 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02002057 h2s = h2c_frt_stream_new(h2c, h2c->dsi);
Willy Tarreau13278b42017-10-13 19:23:14 +02002058 if (!h2s) {
Willy Tarreau96a10c22018-12-23 18:30:44 +01002059 h2s = (struct h2s*)h2_refused_stream;
2060 goto send_rst;
Willy Tarreau13278b42017-10-13 19:23:14 +02002061 }
2062
2063 h2s->st = H2_SS_OPEN;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002064 h2s->rxbuf = rxbuf;
2065 h2s->flags |= flags;
Willy Tarreau1915ca22019-01-24 11:49:37 +01002066 h2s->body_len = body_len;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002067
Willy Tarreau88d138e2019-01-02 19:38:14 +01002068 done:
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002069 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau13278b42017-10-13 19:23:14 +02002070 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002071
2072 if (h2s->flags & H2_SF_ES_RCVD) {
Willy Tarreaufc10f592019-01-30 19:28:32 +01002073 if (h2s->st == H2_SS_OPEN)
2074 h2s->st = H2_SS_HREM;
2075 else
2076 h2s_close(h2s);
Willy Tarreau13278b42017-10-13 19:23:14 +02002077 }
2078
Willy Tarreau3a429f02019-01-03 11:41:50 +01002079 /* update the max stream ID if the request is being processed */
2080 if (h2s->id > h2c->max_id)
2081 h2c->max_id = h2s->id;
Willy Tarreau13278b42017-10-13 19:23:14 +02002082
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002083 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002084
2085 conn_err:
2086 h2c_error(h2c, error);
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002087 goto out;
Willy Tarreau13278b42017-10-13 19:23:14 +02002088
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01002089 out:
2090 h2_release_buf(h2c, &rxbuf);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002091 return NULL;
Willy Tarreau96a10c22018-12-23 18:30:44 +01002092
2093 send_rst:
2094 /* make the demux send an RST for the current stream. We may only
2095 * do this if we're certain that the HEADERS frame was properly
2096 * decompressed so that the HPACK decoder is still kept up to date.
2097 */
2098 h2_release_buf(h2c, &rxbuf);
2099 h2c->st0 = H2_CS_FRAME_E;
2100 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02002101}
2102
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002103/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
2104 * It may return an error in h2c or h2s. Described in RFC7540#6.2. Most of the
2105 * errors here are reported as connection errors since it's impossible to
2106 * recover from such errors after the compression context has been altered.
2107 */
2108static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
2109{
2110 int error;
2111
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002112 if (!b_size(&h2c->dbuf))
2113 return NULL; // empty buffer
2114
2115 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
2116 return NULL; // incomplete frame
2117
Willy Tarreau1915ca22019-01-24 11:49:37 +01002118 error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &h2s->body_len);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002119
Willy Tarreau25919232019-01-03 14:48:18 +01002120 /* unrecoverable error ? */
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002121 if (h2c->st0 >= H2_CS_ERROR)
2122 return NULL;
2123
Willy Tarreau08bb1d62019-01-30 16:55:48 +01002124 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2125 /* RFC7540#5.1 */
2126 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2127 h2c->st0 = H2_CS_FRAME_E;
2128 return NULL;
2129 }
2130
Willy Tarreau25919232019-01-03 14:48:18 +01002131 if (error <= 0) {
2132 if (error == 0)
2133 return NULL; // missing data
2134
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002135 /* stream error : send RST_STREAM */
Willy Tarreau25919232019-01-03 14:48:18 +01002136 h2s_error(h2s, H2_ERR_PROTOCOL_ERROR);
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002137 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau25919232019-01-03 14:48:18 +01002138 return NULL;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002139 }
2140
Christopher Fauletfa922f02019-05-07 10:55:17 +02002141 if (h2c->dff & H2_F_HEADERS_END_STREAM)
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002142 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau45ffc0c2019-01-03 09:32:20 +01002143
Willy Tarreau927b88b2019-03-04 08:03:25 +01002144 if (h2s->cs && h2s->cs->flags & CS_FL_ERROR && h2s->st < H2_SS_ERROR)
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002145 h2s->st = H2_SS_ERROR;
Christopher Fauletfa922f02019-05-07 10:55:17 +02002146 else if (h2s->flags & H2_SF_ES_RCVD) {
2147 if (h2s->st == H2_SS_OPEN)
2148 h2s->st = H2_SS_HREM;
2149 else if (h2s->st == H2_SS_HLOC)
2150 h2s_close(h2s);
2151 }
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002152
2153 return h2s;
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002154}
2155
Willy Tarreau454f9052017-10-26 19:40:35 +02002156/* processes a DATA frame. Returns > 0 on success or zero on missing data.
2157 * It may return an error in h2c or h2s. Described in RFC7540#6.1.
2158 */
2159static int h2c_frt_handle_data(struct h2c *h2c, struct h2s *h2s)
2160{
2161 int error;
2162
2163 /* note that empty DATA frames are perfectly valid and sometimes used
2164 * to signal an end of stream (with the ES flag).
2165 */
2166
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002167 if (!b_size(&h2c->dbuf) && h2c->dfl)
Willy Tarreau454f9052017-10-26 19:40:35 +02002168 return 0; // empty buffer
2169
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002170 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau454f9052017-10-26 19:40:35 +02002171 return 0; // incomplete frame
2172
2173 /* now either the frame is complete or the buffer is complete */
2174
Willy Tarreau454f9052017-10-26 19:40:35 +02002175 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
2176 /* RFC7540#6.1 */
2177 error = H2_ERR_STREAM_CLOSED;
2178 goto strm_err;
2179 }
2180
Willy Tarreau1915ca22019-01-24 11:49:37 +01002181 if ((h2s->flags & H2_SF_DATA_CLEN) && h2c->dfl > h2s->body_len) {
2182 /* RFC7540#8.1.2 */
2183 error = H2_ERR_PROTOCOL_ERROR;
2184 goto strm_err;
2185 }
2186
Willy Tarreaua56a6de2018-02-26 15:59:07 +01002187 if (!h2_frt_transfer_data(h2s))
2188 return 0;
2189
Willy Tarreau454f9052017-10-26 19:40:35 +02002190 /* call the upper layers to process the frame, then let the upper layer
2191 * notify the stream about any change.
2192 */
2193 if (!h2s->cs) {
2194 error = H2_ERR_STREAM_CLOSED;
2195 goto strm_err;
2196 }
2197
Willy Tarreau8f650c32017-11-21 19:36:21 +01002198 if (h2c->st0 >= H2_CS_ERROR)
2199 return 0;
2200
Willy Tarreau721c9742017-11-07 11:05:42 +01002201 if (h2s->st >= H2_SS_ERROR) {
Willy Tarreau454f9052017-10-26 19:40:35 +02002202 /* stream error : send RST_STREAM */
Willy Tarreaua20a5192017-12-27 11:02:06 +01002203 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02002204 }
2205
2206 /* check for completion : the callee will change this to FRAME_A or
2207 * FRAME_H once done.
2208 */
2209 if (h2c->st0 == H2_CS_FRAME_P)
2210 return 0;
2211
Willy Tarreauc4134ba2017-12-11 18:45:08 +01002212 /* last frame */
2213 if (h2c->dff & H2_F_DATA_END_STREAM) {
Christopher Fauletfa922f02019-05-07 10:55:17 +02002214 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreaufc10f592019-01-30 19:28:32 +01002215 if (h2s->st == H2_SS_OPEN)
2216 h2s->st = H2_SS_HREM;
2217 else
2218 h2s_close(h2s);
2219
Willy Tarreau1915ca22019-01-24 11:49:37 +01002220 if (h2s->flags & H2_SF_DATA_CLEN && h2s->body_len) {
2221 /* RFC7540#8.1.2 */
2222 error = H2_ERR_PROTOCOL_ERROR;
2223 goto strm_err;
2224 }
Willy Tarreauc4134ba2017-12-11 18:45:08 +01002225 }
2226
Willy Tarreau454f9052017-10-26 19:40:35 +02002227 return 1;
2228
Willy Tarreau454f9052017-10-26 19:40:35 +02002229 strm_err:
Willy Tarreau6432dc82019-01-30 15:42:44 +01002230 h2s_error(h2s, error);
2231 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02002232 return 0;
2233}
2234
Willy Tarreaubc933932017-10-09 16:21:43 +02002235/* process Rx frames to be demultiplexed */
2236static void h2_process_demux(struct h2c *h2c)
2237{
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002238 struct h2s *h2s = NULL, *tmp_h2s;
Willy Tarreau54f46e52019-01-30 15:11:03 +01002239 struct h2_fh hdr;
2240 unsigned int padlen = 0;
Willy Tarreauf3ee0692017-10-17 08:18:25 +02002241
Willy Tarreau081d4722017-05-16 21:51:05 +02002242 if (h2c->st0 >= H2_CS_ERROR)
2243 return;
Willy Tarreau52eed752017-09-22 15:05:09 +02002244
2245 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
2246 if (h2c->st0 == H2_CS_PREFACE) {
Willy Tarreau01b44822018-10-03 14:26:37 +02002247 if (h2c->flags & H2_CF_IS_BACK)
2248 return;
Willy Tarreau52eed752017-09-22 15:05:09 +02002249 if (unlikely(h2c_frt_recv_preface(h2c) <= 0)) {
2250 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02002251 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau52eed752017-09-22 15:05:09 +02002252 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002253 sess_log(h2c->conn->owner);
2254 }
Willy Tarreau52eed752017-09-22 15:05:09 +02002255 goto fail;
2256 }
2257
2258 h2c->max_id = 0;
2259 h2c->st0 = H2_CS_SETTINGS1;
2260 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002261
2262 if (h2c->st0 == H2_CS_SETTINGS1) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002263 /* ensure that what is pending is a valid SETTINGS frame
2264 * without an ACK.
2265 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002266 if (!h2_get_frame_hdr(&h2c->dbuf, &hdr)) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002267 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02002268 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002269 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002270 sess_log(h2c->conn->owner);
2271 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002272 goto fail;
2273 }
2274
2275 if (hdr.sid || hdr.ft != H2_FT_SETTINGS || hdr.ff & H2_F_SETTINGS_ACK) {
2276 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
2277 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2278 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002279 sess_log(h2c->conn->owner);
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002280 goto fail;
2281 }
2282
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02002283 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002284 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
2285 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
2286 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002287 sess_log(h2c->conn->owner);
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002288 goto fail;
2289 }
2290
Willy Tarreau3bf69182018-12-21 15:34:50 +01002291 /* that's OK, switch to FRAME_P to process it. This is
2292 * a SETTINGS frame whose header has already been
2293 * deleted above.
2294 */
Willy Tarreau54f46e52019-01-30 15:11:03 +01002295 padlen = 0;
2296 goto new_frame;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002297 }
Willy Tarreau52eed752017-09-22 15:05:09 +02002298 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002299
2300 /* process as many incoming frames as possible below */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002301 while (b_data(&h2c->dbuf)) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02002302 int ret = 0;
2303
2304 if (h2c->st0 >= H2_CS_ERROR)
2305 break;
2306
2307 if (h2c->st0 == H2_CS_FRAME_H) {
Willy Tarreaua4428bd2018-12-22 18:11:41 +01002308 if (!h2_peek_frame_hdr(&h2c->dbuf, 0, &hdr))
Willy Tarreau7e98c052017-10-10 15:56:59 +02002309 break;
2310
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02002311 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02002312 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
Willy Tarreau22de8d32018-09-05 19:55:58 +02002313 if (!h2c->nb_streams) {
2314 /* only log if no other stream can report the error */
2315 sess_log(h2c->conn->owner);
2316 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002317 break;
2318 }
2319
Willy Tarreau3bf69182018-12-21 15:34:50 +01002320 if (h2_ft_bit(hdr.ft) & H2_FT_PADDED_MASK && hdr.ff & H2_F_PADDED) {
2321 /* If the frame is padded (HEADERS, PUSH_PROMISE or DATA),
2322 * we read the pad length and drop it from the remaining
2323 * payload (one byte + the 9 remaining ones = 10 total
2324 * removed), so we have a frame payload starting after the
2325 * pad len. Flow controlled frames (DATA) also count the
2326 * padlen in the flow control, so it must be adjusted.
2327 */
2328 if (hdr.len < 1) {
2329 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
2330 sess_log(h2c->conn->owner);
2331 goto fail;
2332 }
2333 hdr.len--;
2334
2335 if (b_data(&h2c->dbuf) < 10)
2336 break; // missing padlen
2337
2338 padlen = *(uint8_t *)b_peek(&h2c->dbuf, 9);
2339
2340 if (padlen > hdr.len) {
2341 /* RFC7540#6.1 : pad length = length of
2342 * frame payload or greater => error.
2343 */
2344 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2345 sess_log(h2c->conn->owner);
2346 goto fail;
2347 }
2348
2349 if (h2_ft_bit(hdr.ft) & H2_FT_FC_MASK) {
2350 h2c->rcvd_c++;
2351 h2c->rcvd_s++;
2352 }
2353 b_del(&h2c->dbuf, 1);
2354 }
2355 h2_skip_frame_hdr(&h2c->dbuf);
Willy Tarreau54f46e52019-01-30 15:11:03 +01002356
2357 new_frame:
Willy Tarreau7e98c052017-10-10 15:56:59 +02002358 h2c->dfl = hdr.len;
2359 h2c->dsi = hdr.sid;
2360 h2c->dft = hdr.ft;
2361 h2c->dff = hdr.ff;
Willy Tarreau3bf69182018-12-21 15:34:50 +01002362 h2c->dpl = padlen;
Willy Tarreau7e98c052017-10-10 15:56:59 +02002363 h2c->st0 = H2_CS_FRAME_P;
Willy Tarreau54f46e52019-01-30 15:11:03 +01002364
2365 /* check for minimum basic frame format validity */
2366 ret = h2_frame_check(h2c->dft, 1, h2c->dsi, h2c->dfl, global.tune.bufsize);
2367 if (ret != H2_ERR_NO_ERROR) {
2368 h2c_error(h2c, ret);
2369 sess_log(h2c->conn->owner);
2370 goto fail;
2371 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002372 }
2373
2374 /* Only H2_CS_FRAME_P and H2_CS_FRAME_A here */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002375 tmp_h2s = h2c_st_by_id(h2c, h2c->dsi);
2376
Willy Tarreau567beb82018-12-18 16:52:44 +01002377 if (tmp_h2s != h2s && h2s && h2s->cs &&
2378 (b_data(&h2s->rxbuf) ||
Willy Tarreau99ad1b32019-05-14 11:46:28 +02002379 (H2_SS_MASK(h2s->st) & H2_SS_EOS_BITS) ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02002380 (h2s->flags & H2_SF_ES_RCVD) ||
2381 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002382 /* we may have to signal the upper layers */
2383 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01002384 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002385 }
2386 h2s = tmp_h2s;
Willy Tarreau7e98c052017-10-10 15:56:59 +02002387
Willy Tarreaud7901432017-12-29 11:34:40 +01002388 if (h2c->st0 == H2_CS_FRAME_E)
2389 goto strm_err;
2390
Willy Tarreauf65b80d2017-10-30 11:46:49 +01002391 if (h2s->st == H2_SS_IDLE &&
2392 h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) {
2393 /* RFC7540#5.1: any frame other than HEADERS or PRIORITY in
2394 * this state MUST be treated as a connection error
2395 */
2396 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau22de8d32018-09-05 19:55:58 +02002397 if (!h2c->nb_streams) {
2398 /* only log if no other stream can report the error */
2399 sess_log(h2c->conn->owner);
2400 }
Willy Tarreauf65b80d2017-10-30 11:46:49 +01002401 break;
2402 }
2403
Willy Tarreauf182a9a2017-10-30 12:03:50 +01002404 if (h2s->st == H2_SS_HREM && h2c->dft != H2_FT_WINDOW_UPDATE &&
2405 h2c->dft != H2_FT_RST_STREAM && h2c->dft != H2_FT_PRIORITY) {
2406 /* RFC7540#5.1: any frame other than WU/PRIO/RST in
Willy Tarreau5b4eae32019-01-24 09:43:32 +01002407 * this state MUST be treated as a stream error.
2408 * 6.2, 6.6 and 6.10 further mandate that HEADERS/
2409 * PUSH_PROMISE/CONTINUATION cause connection errors.
Willy Tarreauf182a9a2017-10-30 12:03:50 +01002410 */
Willy Tarreau5b4eae32019-01-24 09:43:32 +01002411 if (h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK)
2412 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2413 else
2414 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
Willy Tarreauf182a9a2017-10-30 12:03:50 +01002415 goto strm_err;
2416 }
2417
Willy Tarreauab837502017-12-27 15:07:30 +01002418 /* Below the management of frames received in closed state is a
2419 * bit hackish because the spec makes strong differences between
2420 * streams closed by receiving RST, sending RST, and seeing ES
2421 * in both directions. In addition to this, the creation of a
2422 * new stream reusing the identifier of a closed one will be
2423 * detected here. Given that we cannot keep track of all closed
2424 * streams forever, we consider that unknown closed streams were
2425 * closed on RST received, which allows us to respond with an
2426 * RST without breaking the connection (eg: to abort a transfer).
2427 * Some frames have to be silently ignored as well.
2428 */
2429 if (h2s->st == H2_SS_CLOSED && h2c->dsi) {
Willy Tarreau3ad5d312019-01-29 18:33:26 +01002430 if (!(h2c->flags & H2_CF_IS_BACK) && h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
Willy Tarreauab837502017-12-27 15:07:30 +01002431 /* #5.1.1: The identifier of a newly
2432 * established stream MUST be numerically
2433 * greater than all streams that the initiating
2434 * endpoint has opened or reserved. This
2435 * governs streams that are opened using a
2436 * HEADERS frame and streams that are reserved
2437 * using PUSH_PROMISE. An endpoint that
2438 * receives an unexpected stream identifier
2439 * MUST respond with a connection error.
2440 */
2441 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
2442 goto strm_err;
2443 }
2444
Willy Tarreau8d9ac3e2019-01-30 16:58:30 +01002445 if (h2s->flags & H2_SF_RST_RCVD && h2_ft_bit(h2c->dft) & H2_FT_HDR_MASK) {
Willy Tarreauab837502017-12-27 15:07:30 +01002446 /* RFC7540#5.1:closed: an endpoint that
2447 * receives any frame other than PRIORITY after
2448 * receiving a RST_STREAM MUST treat that as a
2449 * stream error of type STREAM_CLOSED.
2450 *
2451 * Note that old streams fall into this category
2452 * and will lead to an RST being sent.
Willy Tarreau8d9ac3e2019-01-30 16:58:30 +01002453 *
2454 * However, we cannot generalize this to all frame types. Those
2455 * carrying compression state must still be processed before
2456 * being dropped or we'll desynchronize the decoder. This can
2457 * happen with request trailers received after sending an
2458 * RST_STREAM, or with header/trailers responses received after
2459 * sending RST_STREAM (aborted stream).
Willy Tarreauab837502017-12-27 15:07:30 +01002460 */
2461 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2462 h2c->st0 = H2_CS_FRAME_E;
2463 goto strm_err;
2464 }
2465
2466 /* RFC7540#5.1:closed: if this state is reached as a
2467 * result of sending a RST_STREAM frame, the peer that
2468 * receives the RST_STREAM might have already sent
2469 * frames on the stream that cannot be withdrawn. An
2470 * endpoint MUST ignore frames that it receives on
2471 * closed streams after it has sent a RST_STREAM
2472 * frame. An endpoint MAY choose to limit the period
2473 * over which it ignores frames and treat frames that
2474 * arrive after this time as being in error.
2475 */
Willy Tarreau24ff1f82019-01-30 19:20:09 +01002476 if (h2s->id && !(h2s->flags & H2_SF_RST_SENT)) {
Willy Tarreauab837502017-12-27 15:07:30 +01002477 /* RFC7540#5.1:closed: any frame other than
2478 * PRIO/WU/RST in this state MUST be treated as
2479 * a connection error
2480 */
2481 if (h2c->dft != H2_FT_RST_STREAM &&
2482 h2c->dft != H2_FT_PRIORITY &&
2483 h2c->dft != H2_FT_WINDOW_UPDATE) {
2484 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
2485 goto strm_err;
2486 }
2487 }
2488 }
2489
Willy Tarreauc0da1962017-10-30 18:38:00 +01002490#if 0
2491 // problem below: it is not possible to completely ignore such
2492 // streams as we need to maintain the compression state as well
2493 // and for this we need to completely process these frames (eg:
2494 // HEADERS frames) as well as counting DATA frames to emit
2495 // proper WINDOW UPDATES and ensure the connection doesn't stall.
2496 // This is a typical case of layer violation where the
2497 // transported contents are critical to the connection's
2498 // validity and must be ignored at the same time :-(
2499
2500 /* graceful shutdown, ignore streams whose ID is higher than
2501 * the one advertised in GOAWAY. RFC7540#6.8.
2502 */
2503 if (unlikely(h2c->last_sid >= 0) && h2c->dsi > h2c->last_sid) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002504 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
2505 b_del(&h2c->dbuf, ret);
Willy Tarreauc0da1962017-10-30 18:38:00 +01002506 h2c->dfl -= ret;
2507 ret = h2c->dfl == 0;
2508 goto strm_err;
2509 }
2510#endif
2511
Willy Tarreau7e98c052017-10-10 15:56:59 +02002512 switch (h2c->dft) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02002513 case H2_FT_SETTINGS:
2514 if (h2c->st0 == H2_CS_FRAME_P)
2515 ret = h2c_handle_settings(h2c);
2516
2517 if (h2c->st0 == H2_CS_FRAME_A)
2518 ret = h2c_ack_settings(h2c);
2519 break;
2520
Willy Tarreaucf68c782017-10-10 17:11:41 +02002521 case H2_FT_PING:
2522 if (h2c->st0 == H2_CS_FRAME_P)
2523 ret = h2c_handle_ping(h2c);
2524
2525 if (h2c->st0 == H2_CS_FRAME_A)
2526 ret = h2c_ack_ping(h2c);
2527 break;
2528
Willy Tarreau26f95952017-07-27 17:18:30 +02002529 case H2_FT_WINDOW_UPDATE:
2530 if (h2c->st0 == H2_CS_FRAME_P)
2531 ret = h2c_handle_window_update(h2c, h2s);
2532 break;
2533
Willy Tarreau61290ec2017-10-17 08:19:21 +02002534 case H2_FT_CONTINUATION:
Willy Tarreauea18f862018-12-22 20:19:26 +01002535 /* RFC7540#6.10: CONTINUATION may only be preceeded by
2536 * a HEADERS/PUSH_PROMISE/CONTINUATION frame. These
2537 * frames' parsers consume all following CONTINUATION
2538 * frames so this one is out of sequence.
Willy Tarreau61290ec2017-10-17 08:19:21 +02002539 */
Willy Tarreauea18f862018-12-22 20:19:26 +01002540 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2541 sess_log(h2c->conn->owner);
2542 goto fail;
Willy Tarreau61290ec2017-10-17 08:19:21 +02002543
Willy Tarreau13278b42017-10-13 19:23:14 +02002544 case H2_FT_HEADERS:
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002545 if (h2c->st0 == H2_CS_FRAME_P) {
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002546 if (h2c->flags & H2_CF_IS_BACK)
2547 tmp_h2s = h2c_bck_handle_headers(h2c, h2s);
2548 else
2549 tmp_h2s = h2c_frt_handle_headers(h2c, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002550 if (tmp_h2s) {
2551 h2s = tmp_h2s;
2552 ret = 1;
2553 }
2554 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002555 break;
2556
Willy Tarreau454f9052017-10-26 19:40:35 +02002557 case H2_FT_DATA:
2558 if (h2c->st0 == H2_CS_FRAME_P)
2559 ret = h2c_frt_handle_data(h2c, h2s);
2560
2561 if (h2c->st0 == H2_CS_FRAME_A)
2562 ret = h2c_send_strm_wu(h2c);
2563 break;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002564
Willy Tarreau92153fc2017-12-03 19:46:19 +01002565 case H2_FT_PRIORITY:
2566 if (h2c->st0 == H2_CS_FRAME_P)
2567 ret = h2c_handle_priority(h2c);
2568 break;
2569
Willy Tarreaucd234e92017-08-18 10:59:39 +02002570 case H2_FT_RST_STREAM:
2571 if (h2c->st0 == H2_CS_FRAME_P)
2572 ret = h2c_handle_rst_stream(h2c, h2s);
2573 break;
2574
Willy Tarreaue96b0922017-10-30 00:28:29 +01002575 case H2_FT_GOAWAY:
2576 if (h2c->st0 == H2_CS_FRAME_P)
2577 ret = h2c_handle_goaway(h2c);
2578 break;
2579
Willy Tarreau1c661982017-10-30 13:52:01 +01002580 /* implement all extra frame types here */
Willy Tarreau7e98c052017-10-10 15:56:59 +02002581 default:
2582 /* drop frames that we ignore. They may be larger than
2583 * the buffer so we drain all of their contents until
2584 * we reach the end.
2585 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002586 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
2587 b_del(&h2c->dbuf, ret);
Willy Tarreau7e98c052017-10-10 15:56:59 +02002588 h2c->dfl -= ret;
2589 ret = h2c->dfl == 0;
2590 }
2591
Willy Tarreauf182a9a2017-10-30 12:03:50 +01002592 strm_err:
Willy Tarreaua20a5192017-12-27 11:02:06 +01002593 /* We may have to send an RST if not done yet */
2594 if (h2s->st == H2_SS_ERROR)
2595 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002596
Willy Tarreaua20a5192017-12-27 11:02:06 +01002597 if (h2c->st0 == H2_CS_FRAME_E)
2598 ret = h2c_send_rst_stream(h2c, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02002599
Willy Tarreau7e98c052017-10-10 15:56:59 +02002600 /* error or missing data condition met above ? */
Willy Tarreau1ed87b72018-11-25 08:45:16 +01002601 if (ret <= 0)
Willy Tarreau7e98c052017-10-10 15:56:59 +02002602 break;
2603
2604 if (h2c->st0 != H2_CS_FRAME_H) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002605 b_del(&h2c->dbuf, h2c->dfl);
Willy Tarreau7e98c052017-10-10 15:56:59 +02002606 h2c->st0 = H2_CS_FRAME_H;
2607 }
2608 }
Willy Tarreau52eed752017-09-22 15:05:09 +02002609
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002610 if (h2c->rcvd_c > 0 &&
2611 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM)))
2612 h2c_send_conn_wu(h2c);
2613
Willy Tarreau52eed752017-09-22 15:05:09 +02002614 fail:
2615 /* we can go here on missing data, blocked response or error */
Willy Tarreau567beb82018-12-18 16:52:44 +01002616 if (h2s && h2s->cs &&
2617 (b_data(&h2s->rxbuf) ||
Willy Tarreau99ad1b32019-05-14 11:46:28 +02002618 (H2_SS_MASK(h2s->st) & H2_SS_EOS_BITS) ||
Christopher Fauletfa922f02019-05-07 10:55:17 +02002619 (h2s->flags & H2_SF_ES_RCVD) ||
2620 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002621 /* we may have to signal the upper layers */
2622 h2s->cs->flags |= CS_FL_RCV_MORE;
Willy Tarreau7e094452018-12-19 18:08:52 +01002623 h2s_notify_recv(h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002624 }
Willy Tarreau1ed87b72018-11-25 08:45:16 +01002625
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02002626 h2c_restart_reading(h2c, 0);
Willy Tarreaubc933932017-10-09 16:21:43 +02002627}
2628
2629/* process Tx frames from streams to be multiplexed. Returns > 0 if it reached
2630 * the end.
2631 */
2632static int h2_process_mux(struct h2c *h2c)
2633{
Olivier Houchard998410a2019-04-15 19:23:37 +02002634 struct h2s *h2s, *h2s_back;
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02002635
Willy Tarreau01b44822018-10-03 14:26:37 +02002636 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
2637 if (unlikely(h2c->st0 == H2_CS_PREFACE && (h2c->flags & H2_CF_IS_BACK))) {
2638 if (unlikely(h2c_bck_send_preface(h2c) <= 0)) {
2639 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
2640 if (h2c->st0 == H2_CS_ERROR) {
2641 h2c->st0 = H2_CS_ERROR2;
2642 sess_log(h2c->conn->owner);
2643 }
2644 goto fail;
2645 }
2646 h2c->st0 = H2_CS_SETTINGS1;
2647 }
2648 /* need to wait for the other side */
Willy Tarreau75a930a2018-12-12 08:03:58 +01002649 if (h2c->st0 < H2_CS_FRAME_H)
Willy Tarreau01b44822018-10-03 14:26:37 +02002650 return 1;
2651 }
2652
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002653 /* start by sending possibly pending window updates */
2654 if (h2c->rcvd_c > 0 &&
2655 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
2656 h2c_send_conn_wu(h2c) < 0)
2657 goto fail;
2658
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02002659 /* First we always process the flow control list because the streams
2660 * waiting there were already elected for immediate emission but were
2661 * blocked just on this.
2662 */
2663
Olivier Houchard998410a2019-04-15 19:23:37 +02002664 list_for_each_entry_safe(h2s, h2s_back, &h2c->fctl_list, list) {
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02002665 if (h2c->mws <= 0 || h2c->flags & H2_CF_MUX_BLOCK_ANY ||
2666 h2c->st0 >= H2_CS_ERROR)
2667 break;
Olivier Houchard998410a2019-04-15 19:23:37 +02002668
Willy Tarreauc234ae32019-05-13 17:56:11 +02002669 if (LIST_ADDED(&h2s->sending_list))
Olivier Houchardd360ac62019-03-22 17:37:16 +01002670 continue;
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02002671
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002672 h2s->flags &= ~H2_SF_BLK_ANY;
Olivier Houchard998410a2019-04-15 19:23:37 +02002673 /* For some reason, the upper layer failed to subsribe again,
2674 * so remove it from the send_list
2675 */
2676 if (!h2s->send_wait) {
2677 LIST_DEL_INIT(&h2s->list);
2678 continue;
2679 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01002680 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Olivier Houchardd360ac62019-03-22 17:37:16 +01002681 LIST_ADDQ(&h2c->sending_list, &h2s->sending_list);
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002682 tasklet_wakeup(h2s->send_wait->task);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02002683 }
2684
Olivier Houchard998410a2019-04-15 19:23:37 +02002685 list_for_each_entry_safe(h2s, h2s_back, &h2c->send_list, list) {
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02002686 if (h2c->st0 >= H2_CS_ERROR || h2c->flags & H2_CF_MUX_BLOCK_ANY)
2687 break;
Olivier Houchard998410a2019-04-15 19:23:37 +02002688
Willy Tarreauc234ae32019-05-13 17:56:11 +02002689 if (LIST_ADDED(&h2s->sending_list))
Olivier Houchardd360ac62019-03-22 17:37:16 +01002690 continue;
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02002691
Olivier Houchard998410a2019-04-15 19:23:37 +02002692 /* For some reason, the upper layer failed to subsribe again,
2693 * so remove it from the send_list
2694 */
2695 if (!h2s->send_wait) {
2696 LIST_DEL_INIT(&h2s->list);
2697 continue;
2698 }
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002699 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01002700 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Olivier Houchardd360ac62019-03-22 17:37:16 +01002701 LIST_ADDQ(&h2c->sending_list, &h2s->sending_list);
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002702 tasklet_wakeup(h2s->send_wait->task);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02002703 }
2704
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002705 fail:
Willy Tarreau3eabe9b2017-11-07 11:03:01 +01002706 if (unlikely(h2c->st0 >= H2_CS_ERROR)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02002707 if (h2c->st0 == H2_CS_ERROR) {
2708 if (h2c->max_id >= 0) {
2709 h2c_send_goaway_error(h2c, NULL);
2710 if (h2c->flags & H2_CF_MUX_BLOCK_ANY)
2711 return 0;
2712 }
2713
2714 h2c->st0 = H2_CS_ERROR2; // sent (or failed hard) !
2715 }
2716 return 1;
2717 }
Olivier Houchardd360ac62019-03-22 17:37:16 +01002718 return (1);
Willy Tarreaubc933932017-10-09 16:21:43 +02002719}
2720
Willy Tarreau62f52692017-10-08 23:01:42 +02002721
Willy Tarreau479998a2018-11-18 06:30:59 +01002722/* Attempt to read data, and subscribe if none available.
2723 * The function returns 1 if data has been received, otherwise zero.
2724 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002725static int h2_recv(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02002726{
Olivier Houchardaf4021e2018-08-09 13:06:55 +02002727 struct connection *conn = h2c->conn;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02002728 struct buffer *buf;
Willy Tarreaua2af5122017-10-09 11:56:46 +02002729 int max;
Olivier Houchard7505f942018-08-21 18:10:44 +02002730 size_t ret;
Willy Tarreaua2af5122017-10-09 11:56:46 +02002731
Willy Tarreau4f6516d2018-12-19 13:59:17 +01002732 if (h2c->wait_event.events & SUB_RETRY_RECV)
Olivier Houchard81a15af2018-10-19 17:26:49 +02002733 return (b_data(&h2c->dbuf));
Olivier Houchardaf4021e2018-08-09 13:06:55 +02002734
Willy Tarreau315d8072017-12-10 22:17:57 +01002735 if (!h2_recv_allowed(h2c))
Olivier Houchard81a15af2018-10-19 17:26:49 +02002736 return 1;
Willy Tarreaua2af5122017-10-09 11:56:46 +02002737
Willy Tarreau44e973f2018-03-01 17:49:30 +01002738 buf = h2_get_buf(h2c, &h2c->dbuf);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02002739 if (!buf) {
2740 h2c->flags |= H2_CF_DEM_DALLOC;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002741 return 0;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02002742 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02002743
Olivier Houchard7505f942018-08-21 18:10:44 +02002744 do {
Willy Tarreaue0f24ee2018-12-14 10:51:23 +01002745 b_realign_if_empty(buf);
Willy Tarreau2a59e872018-12-12 08:23:47 +01002746 if (!b_data(buf) && (h2c->proxy->options2 & PR_O2_USE_HTX)) {
2747 /* HTX in use : try to pre-align the buffer like the
2748 * rxbufs will be to optimize memory copies. We'll make
2749 * sure that the frame header lands at the end of the
2750 * HTX block to alias it upon recv. We cannot use the
2751 * head because rcv_buf() will realign the buffer if
2752 * it's empty. Thus we cheat and pretend we already
2753 * have a few bytes there.
2754 */
2755 max = buf_room_for_htx_data(buf) + 9;
Willy Tarreauc0960d12018-12-14 10:59:15 +01002756 buf->head = sizeof(struct htx) - 9;
Willy Tarreau2a59e872018-12-12 08:23:47 +01002757 }
2758 else
2759 max = b_room(buf);
2760
Olivier Houchard7505f942018-08-21 18:10:44 +02002761 if (max)
Olivier Houcharde179d0e2019-03-21 18:27:17 +01002762 ret = conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0);
Olivier Houchard7505f942018-08-21 18:10:44 +02002763 else
2764 ret = 0;
2765 } while (ret > 0);
Willy Tarreaua2af5122017-10-09 11:56:46 +02002766
Olivier Houchard53216e72018-10-10 15:46:36 +02002767 if (h2_recv_allowed(h2c) && (b_data(buf) < buf->size))
Olivier Houcharde179d0e2019-03-21 18:27:17 +01002768 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h2c->wait_event);
Olivier Houchard81a15af2018-10-19 17:26:49 +02002769
Olivier Houcharda1411e62018-08-17 18:42:48 +02002770 if (!b_data(buf)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +01002771 h2_release_buf(h2c, &h2c->dbuf);
Olivier Houchard46677732018-11-29 17:06:17 +01002772 return (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn));
Willy Tarreaua2af5122017-10-09 11:56:46 +02002773 }
2774
Willy Tarreaub7b5fe12018-06-18 13:33:09 +02002775 if (b_data(buf) == buf->size)
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02002776 h2c->flags |= H2_CF_DEM_DFULL;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002777 return 1;
Willy Tarreau62f52692017-10-08 23:01:42 +02002778}
2779
Willy Tarreau479998a2018-11-18 06:30:59 +01002780/* Try to send data if possible.
2781 * The function returns 1 if data have been sent, otherwise zero.
2782 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002783static int h2_send(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02002784{
Olivier Houchard29fb89d2018-08-02 18:56:36 +02002785 struct connection *conn = h2c->conn;
Willy Tarreaubc933932017-10-09 16:21:43 +02002786 int done;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002787 int sent = 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02002788
2789 if (conn->flags & CO_FL_ERROR)
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01002790 return 1;
Willy Tarreaua2af5122017-10-09 11:56:46 +02002791
Olivier Houchard7505f942018-08-21 18:10:44 +02002792
Willy Tarreaua2af5122017-10-09 11:56:46 +02002793 if (conn->flags & (CO_FL_HANDSHAKE|CO_FL_WAIT_L4_CONN|CO_FL_WAIT_L6_CONN)) {
2794 /* a handshake was requested */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002795 goto schedule;
Willy Tarreaua2af5122017-10-09 11:56:46 +02002796 }
2797
Willy Tarreaubc933932017-10-09 16:21:43 +02002798 /* This loop is quite simple : it tries to fill as much as it can from
2799 * pending streams into the existing buffer until it's reportedly full
2800 * or the end of send requests is reached. Then it tries to send this
2801 * buffer's contents out, marks it not full if at least one byte could
2802 * be sent, and tries again.
2803 *
2804 * The snd_buf() function normally takes a "flags" argument which may
2805 * be made of a combination of CO_SFL_MSG_MORE to indicate that more
2806 * data immediately comes and CO_SFL_STREAMER to indicate that the
2807 * connection is streaming lots of data (used to increase TLS record
2808 * size at the expense of latency). The former can be sent any time
2809 * there's a buffer full flag, as it indicates at least one stream
2810 * attempted to send and failed so there are pending data. An
2811 * alternative would be to set it as long as there's an active stream
2812 * but that would be problematic for ACKs until we have an absolute
2813 * guarantee that all waiters have at least one byte to send. The
2814 * latter should possibly not be set for now.
2815 */
2816
2817 done = 0;
2818 while (!done) {
2819 unsigned int flags = 0;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02002820 unsigned int released = 0;
2821 struct buffer *buf;
Willy Tarreaubc933932017-10-09 16:21:43 +02002822
2823 /* fill as much as we can into the current buffer */
2824 while (((h2c->flags & (H2_CF_MUX_MFULL|H2_CF_MUX_MALLOC)) == 0) && !done)
2825 done = h2_process_mux(h2c);
2826
Olivier Houchard2b094432019-01-29 18:28:36 +01002827 if (h2c->flags & H2_CF_MUX_MALLOC)
Willy Tarreau7f1265a2019-05-29 17:36:37 +02002828 done = 1; // we won't go further without extra buffers
Olivier Houchard2b094432019-01-29 18:28:36 +01002829
Willy Tarreaubc933932017-10-09 16:21:43 +02002830 if (conn->flags & CO_FL_ERROR)
2831 break;
2832
2833 if (h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))
2834 flags |= CO_SFL_MSG_MORE;
2835
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02002836 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
2837 if (b_data(buf)) {
2838 int ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, buf, b_data(buf), flags);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02002839 if (!ret) {
2840 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02002841 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02002842 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02002843 sent = 1;
2844 b_del(buf, ret);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02002845 if (b_data(buf)) {
2846 done = 1;
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02002847 break;
Willy Tarreau7f1265a2019-05-29 17:36:37 +02002848 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02002849 }
2850 b_free(buf);
2851 released++;
Willy Tarreau787db9a2018-06-14 18:31:46 +02002852 }
Willy Tarreaubc933932017-10-09 16:21:43 +02002853
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02002854 if (released)
Willy Tarreau201840a2019-05-29 17:50:48 +02002855 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02002856
Willy Tarreaubc933932017-10-09 16:21:43 +02002857 /* wrote at least one byte, the buffer is not full anymore */
2858 h2c->flags &= ~(H2_CF_MUX_MFULL | H2_CF_DEM_MROOM);
2859 }
2860
Willy Tarreaua2af5122017-10-09 11:56:46 +02002861 if (conn->flags & CO_FL_SOCK_WR_SH) {
2862 /* output closed, nothing to send, clear the buffer to release it */
Willy Tarreau51330962019-05-26 09:38:07 +02002863 b_reset(br_tail(h2c->mbuf));
Willy Tarreaua2af5122017-10-09 11:56:46 +02002864 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02002865 /* We're not full anymore, so we can wake any task that are waiting
2866 * for us.
2867 */
2868 if (!(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM))) {
Olivier Houchardd360ac62019-03-22 17:37:16 +01002869 struct h2s *h2s;
2870
2871 list_for_each_entry(h2s, &h2c->send_list, list) {
2872 if (h2c->st0 >= H2_CS_ERROR || h2c->flags & H2_CF_MUX_BLOCK_ANY)
2873 break;
Olivier Houchard998410a2019-04-15 19:23:37 +02002874
Willy Tarreauc234ae32019-05-13 17:56:11 +02002875 if (LIST_ADDED(&h2s->sending_list))
Olivier Houchardd360ac62019-03-22 17:37:16 +01002876 continue;
2877
Olivier Houchard998410a2019-04-15 19:23:37 +02002878 /* For some reason, the upper layer failed to subsribe again,
2879 * so remove it from the send_list
2880 */
2881 if (!h2s->send_wait) {
2882 LIST_DEL_INIT(&h2s->list);
2883 continue;
2884 }
Olivier Houchardd360ac62019-03-22 17:37:16 +01002885 h2s->flags &= ~H2_SF_BLK_ANY;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01002886 h2s->send_wait->events &= ~SUB_RETRY_SEND;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002887 tasklet_wakeup(h2s->send_wait->task);
Olivier Houchardd360ac62019-03-22 17:37:16 +01002888 LIST_ADDQ(&h2c->sending_list, &h2s->sending_list);
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02002889 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02002890 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02002891 /* We're done, no more to send */
Willy Tarreau662fafc2019-05-26 09:43:07 +02002892 if (!br_data(h2c->mbuf))
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002893 return sent;
Olivier Houchard910b2bc2018-07-17 18:49:38 +02002894schedule:
Willy Tarreau7f1265a2019-05-29 17:36:37 +02002895 if (!(conn->flags & CO_FL_ERROR) && !(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houcharde179d0e2019-03-21 18:27:17 +01002896 conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &h2c->wait_event);
Willy Tarreau7f1265a2019-05-29 17:36:37 +02002897
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002898 return sent;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02002899}
2900
Willy Tarreau749f5ca2019-03-21 19:19:36 +01002901/* this is the tasklet referenced in h2c->wait_event.task */
Olivier Houchard29fb89d2018-08-02 18:56:36 +02002902static struct task *h2_io_cb(struct task *t, void *ctx, unsigned short status)
2903{
2904 struct h2c *h2c = ctx;
Olivier Houchard7505f942018-08-21 18:10:44 +02002905 int ret = 0;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02002906
Willy Tarreau4f6516d2018-12-19 13:59:17 +01002907 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchard7505f942018-08-21 18:10:44 +02002908 ret = h2_send(h2c);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01002909 if (!(h2c->wait_event.events & SUB_RETRY_RECV))
Olivier Houchard7505f942018-08-21 18:10:44 +02002910 ret |= h2_recv(h2c);
Willy Tarreaucef5c8e2018-12-18 10:29:54 +01002911 if (ret || b_data(&h2c->dbuf))
Olivier Houchard7505f942018-08-21 18:10:44 +02002912 h2_process(h2c);
Olivier Houchard910b2bc2018-07-17 18:49:38 +02002913 return NULL;
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02002914}
Willy Tarreaua2af5122017-10-09 11:56:46 +02002915
Willy Tarreau62f52692017-10-08 23:01:42 +02002916/* callback called on any event by the connection handler.
2917 * It applies changes and returns zero, or < 0 if it wants immediate
2918 * destruction of the connection (which normally doesn not happen in h2).
2919 */
Olivier Houchard7505f942018-08-21 18:10:44 +02002920static int h2_process(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02002921{
Olivier Houchard7505f942018-08-21 18:10:44 +02002922 struct connection *conn = h2c->conn;
Willy Tarreaua2af5122017-10-09 11:56:46 +02002923
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002924 if (b_data(&h2c->dbuf) && !(h2c->flags & H2_CF_DEM_BLOCK_ANY)) {
Willy Tarreaud13bf272017-12-14 10:34:52 +01002925 h2_process_demux(h2c);
2926
2927 if (h2c->st0 >= H2_CS_ERROR || conn->flags & CO_FL_ERROR)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002928 b_reset(&h2c->dbuf);
Willy Tarreaud13bf272017-12-14 10:34:52 +01002929
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002930 if (!b_full(&h2c->dbuf))
Willy Tarreaud13bf272017-12-14 10:34:52 +01002931 h2c->flags &= ~H2_CF_DEM_DFULL;
2932 }
Olivier Houchard7505f942018-08-21 18:10:44 +02002933 h2_send(h2c);
Willy Tarreaud13bf272017-12-14 10:34:52 +01002934
Willy Tarreau0b37d652018-10-03 10:33:02 +02002935 if (unlikely(h2c->proxy->state == PR_STSTOPPED)) {
Willy Tarreau8ec14062017-12-30 18:08:13 +01002936 /* frontend is stopping, reload likely in progress, let's try
2937 * to announce a graceful shutdown if not yet done. We don't
2938 * care if it fails, it will be tried again later.
2939 */
2940 if (!(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
2941 if (h2c->last_sid < 0)
2942 h2c->last_sid = (1U << 31) - 1;
2943 h2c_send_goaway_error(h2c, NULL);
2944 }
2945 }
2946
Olivier Houchard7fc96d52017-11-23 18:25:47 +01002947 /*
Olivier Houchard6fa63d92017-11-27 18:41:32 +01002948 * If we received early data, and the handshake is done, wake
2949 * any stream that was waiting for it.
Olivier Houchard7fc96d52017-11-23 18:25:47 +01002950 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +01002951 if (!(h2c->flags & H2_CF_WAIT_FOR_HS) &&
2952 (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_HANDSHAKE | CO_FL_EARLY_DATA)) == CO_FL_EARLY_DATA) {
2953 struct eb32_node *node;
2954 struct h2s *h2s;
2955
2956 h2c->flags |= H2_CF_WAIT_FOR_HS;
2957 node = eb32_lookup_ge(&h2c->streams_by_id, 1);
2958
2959 while (node) {
2960 h2s = container_of(node, struct h2s, by_id);
Willy Tarreaufde287c2018-12-19 18:33:16 +01002961 if (h2s->cs && h2s->cs->flags & CS_FL_WAIT_FOR_HS)
Willy Tarreau7e094452018-12-19 18:08:52 +01002962 h2s_notify_recv(h2s);
Olivier Houchard6fa63d92017-11-27 18:41:32 +01002963 node = eb32_next(node);
2964 }
Olivier Houchard7fc96d52017-11-23 18:25:47 +01002965 }
Olivier Houchard6fa63d92017-11-27 18:41:32 +01002966
Willy Tarreau26bd7612017-10-09 16:47:04 +02002967 if (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn) ||
Willy Tarreau29a98242017-10-31 06:59:15 +01002968 h2c->st0 == H2_CS_ERROR2 || h2c->flags & H2_CF_GOAWAY_FAILED ||
2969 (eb_is_empty(&h2c->streams_by_id) && h2c->last_sid >= 0 &&
2970 h2c->max_id >= h2c->last_sid)) {
Willy Tarreau23482912019-05-07 15:23:14 +02002971 h2_wake_some_streams(h2c, 0);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02002972
2973 if (eb_is_empty(&h2c->streams_by_id)) {
2974 /* no more stream, kill the connection now */
Christopher Faulet73c12072019-04-08 11:23:22 +02002975 h2_release(h2c);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02002976 return -1;
2977 }
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02002978 }
2979
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002980 if (!b_data(&h2c->dbuf))
Willy Tarreau44e973f2018-03-01 17:49:30 +01002981 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02002982
Olivier Houchard53216e72018-10-10 15:46:36 +02002983 if ((conn->flags & CO_FL_SOCK_WR_SH) ||
2984 h2c->st0 == H2_CS_ERROR2 || (h2c->flags & H2_CF_GOAWAY_FAILED) ||
2985 (h2c->st0 != H2_CS_ERROR &&
Willy Tarreau662fafc2019-05-26 09:43:07 +02002986 !br_data(h2c->mbuf) &&
Olivier Houchard53216e72018-10-10 15:46:36 +02002987 (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) &&
2988 ((h2c->flags & H2_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&h2c->send_list))))
Willy Tarreau2e3c0002019-05-26 09:45:23 +02002989 h2_release_mbuf(h2c);
Willy Tarreaua2af5122017-10-09 11:56:46 +02002990
Willy Tarreau3f133572017-10-31 19:21:06 +01002991 if (h2c->task) {
Willy Tarreau73481192019-06-07 08:20:46 +02002992 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
2993 task_queue(h2c->task);
Willy Tarreauea392822017-10-31 10:02:25 +01002994 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02002995
Olivier Houchard7505f942018-08-21 18:10:44 +02002996 h2_send(h2c);
Willy Tarreau62f52692017-10-08 23:01:42 +02002997 return 0;
2998}
2999
Willy Tarreau749f5ca2019-03-21 19:19:36 +01003000/* wake-up function called by the connection layer (mux_ops.wake) */
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003001static int h2_wake(struct connection *conn)
3002{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003003 struct h2c *h2c = conn->ctx;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02003004
3005 return (h2_process(h2c));
3006}
3007
Willy Tarreauea392822017-10-31 10:02:25 +01003008/* Connection timeout management. The principle is that if there's no receipt
3009 * nor sending for a certain amount of time, the connection is closed. If the
3010 * MUX buffer still has lying data or is not allocatable, the connection is
3011 * immediately killed. If it's allocatable and empty, we attempt to send a
3012 * GOAWAY frame.
3013 */
Olivier Houchard9f6af332018-05-25 14:04:04 +02003014static struct task *h2_timeout_task(struct task *t, void *context, unsigned short state)
Willy Tarreauea392822017-10-31 10:02:25 +01003015{
Olivier Houchard9f6af332018-05-25 14:04:04 +02003016 struct h2c *h2c = context;
Willy Tarreauea392822017-10-31 10:02:25 +01003017 int expired = tick_is_expired(t->expire, now_ms);
3018
Willy Tarreau0975f112018-03-29 15:22:59 +02003019 if (!expired && h2c)
Willy Tarreauea392822017-10-31 10:02:25 +01003020 return t;
3021
Olivier Houchard3f795f72019-04-17 22:51:06 +02003022 task_destroy(t);
Willy Tarreau0975f112018-03-29 15:22:59 +02003023
3024 if (!h2c) {
3025 /* resources were already deleted */
3026 return NULL;
3027 }
3028
3029 h2c->task = NULL;
Willy Tarreauea392822017-10-31 10:02:25 +01003030 h2c_error(h2c, H2_ERR_NO_ERROR);
Willy Tarreau23482912019-05-07 15:23:14 +02003031 h2_wake_some_streams(h2c, 0);
Willy Tarreauea392822017-10-31 10:02:25 +01003032
Willy Tarreau662fafc2019-05-26 09:43:07 +02003033 if (br_data(h2c->mbuf)) {
Willy Tarreauea392822017-10-31 10:02:25 +01003034 /* don't even try to send a GOAWAY, the buffer is stuck */
3035 h2c->flags |= H2_CF_GOAWAY_FAILED;
3036 }
3037
3038 /* try to send but no need to insist */
Willy Tarreau599391a2017-11-24 10:16:00 +01003039 h2c->last_sid = h2c->max_id;
Willy Tarreauea392822017-10-31 10:02:25 +01003040 if (h2c_send_goaway_error(h2c, NULL) <= 0)
3041 h2c->flags |= H2_CF_GOAWAY_FAILED;
3042
Willy Tarreau662fafc2019-05-26 09:43:07 +02003043 if (br_data(h2c->mbuf) && !(h2c->flags & H2_CF_GOAWAY_FAILED) && conn_xprt_ready(h2c->conn)) {
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003044 unsigned int released = 0;
3045 struct buffer *buf;
3046
3047 for (buf = br_head(h2c->mbuf); b_size(buf); buf = br_del_head(h2c->mbuf)) {
3048 if (b_data(buf)) {
3049 int ret = h2c->conn->xprt->snd_buf(h2c->conn, h2c->conn->xprt_ctx, buf, b_data(buf), 0);
3050 if (!ret)
3051 break;
3052 b_del(buf, ret);
3053 if (b_data(buf))
3054 break;
3055 b_free(buf);
3056 released++;
3057 }
Willy Tarreau787db9a2018-06-14 18:31:46 +02003058 }
Willy Tarreau41c4d6a2019-05-26 09:49:17 +02003059
3060 if (released)
Willy Tarreau201840a2019-05-29 17:50:48 +02003061 offer_buffers(NULL, tasks_run_queue);
Willy Tarreau787db9a2018-06-14 18:31:46 +02003062 }
Willy Tarreauea392822017-10-31 10:02:25 +01003063
Willy Tarreau0975f112018-03-29 15:22:59 +02003064 /* either we can release everything now or it will be done later once
3065 * the last stream closes.
3066 */
3067 if (eb_is_empty(&h2c->streams_by_id))
Christopher Faulet73c12072019-04-08 11:23:22 +02003068 h2_release(h2c);
Willy Tarreauea392822017-10-31 10:02:25 +01003069
Willy Tarreauea392822017-10-31 10:02:25 +01003070 return NULL;
3071}
3072
3073
Willy Tarreau62f52692017-10-08 23:01:42 +02003074/*******************************************/
3075/* functions below are used by the streams */
3076/*******************************************/
3077
3078/*
3079 * Attach a new stream to a connection
3080 * (Used for outgoing connections)
3081 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01003082static struct conn_stream *h2_attach(struct connection *conn, struct session *sess)
Willy Tarreau62f52692017-10-08 23:01:42 +02003083{
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003084 struct conn_stream *cs;
3085 struct h2s *h2s;
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003086 struct h2c *h2c = conn->ctx;
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003087
3088 cs = cs_new(conn);
3089 if (!cs)
3090 return NULL;
Olivier Houchardf502aca2018-12-14 19:42:40 +01003091 h2s = h2c_bck_stream_new(h2c, cs, sess);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01003092 if (!h2s) {
3093 cs_free(cs);
3094 return NULL;
3095 }
3096 return cs;
Willy Tarreau62f52692017-10-08 23:01:42 +02003097}
3098
Willy Tarreaufafd3982018-11-18 21:29:20 +01003099/* Retrieves the first valid conn_stream from this connection, or returns NULL.
3100 * We have to scan because we may have some orphan streams. It might be
3101 * beneficial to scan backwards from the end to reduce the likeliness to find
3102 * orphans.
3103 */
3104static const struct conn_stream *h2_get_first_cs(const struct connection *conn)
3105{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01003106 struct h2c *h2c = conn->ctx;
Willy Tarreaufafd3982018-11-18 21:29:20 +01003107 struct h2s *h2s;
3108 struct eb32_node *node;
3109
3110 node = eb32_first(&h2c->streams_by_id);
3111 while (node) {
3112 h2s = container_of(node, struct h2s, by_id);
3113 if (h2s->cs)
3114 return h2s->cs;
3115 node = eb32_next(node);
3116 }
3117 return NULL;
3118}
3119
Willy Tarreau62f52692017-10-08 23:01:42 +02003120/*
Olivier Houchard060ed432018-11-06 16:32:42 +01003121 * Destroy the mux and the associated connection, if it is no longer used
3122 */
Christopher Faulet73c12072019-04-08 11:23:22 +02003123static void h2_destroy(void *ctx)
Olivier Houchard060ed432018-11-06 16:32:42 +01003124{
Christopher Faulet73c12072019-04-08 11:23:22 +02003125 struct h2c *h2c = ctx;
Olivier Houchard060ed432018-11-06 16:32:42 +01003126
Christopher Faulet39a96ee2019-04-08 10:52:21 +02003127 if (eb_is_empty(&h2c->streams_by_id) || !h2c->conn || h2c->conn->ctx != h2c)
Christopher Faulet73c12072019-04-08 11:23:22 +02003128 h2_release(h2c);
Olivier Houchard060ed432018-11-06 16:32:42 +01003129}
3130
3131/*
Willy Tarreau62f52692017-10-08 23:01:42 +02003132 * Detach the stream from the connection and possibly release the connection.
3133 */
3134static void h2_detach(struct conn_stream *cs)
3135{
Willy Tarreau60935142017-10-16 18:11:19 +02003136 struct h2s *h2s = cs->ctx;
3137 struct h2c *h2c;
Olivier Houchardf502aca2018-12-14 19:42:40 +01003138 struct session *sess;
Willy Tarreau60935142017-10-16 18:11:19 +02003139
3140 cs->ctx = NULL;
3141 if (!h2s)
3142 return;
3143
Olivier Houchard998410a2019-04-15 19:23:37 +02003144 /* The stream is about to die, so no need to attempt to run its task */
Willy Tarreauc234ae32019-05-13 17:56:11 +02003145 if (LIST_ADDED(&h2s->sending_list) &&
Olivier Houchard998410a2019-04-15 19:23:37 +02003146 h2s->send_wait != &h2s->wait_event) {
3147 task_remove_from_tasklet_list((struct task *)h2s->send_wait->task);
3148 LIST_DEL_INIT(&h2s->sending_list);
Olivier Houchardd9986ed2019-05-09 13:24:08 +02003149 /*
3150 * At this point, the stream_interface is supposed to have called
3151 * h2_unsubscribe(), so the only way there's still a
3152 * subscription that came from the stream_interface (as we
3153 * can subscribe ourself, in h2_do_shutw() and h2_do_shutr(),
3154 * without the stream_interface involved) is that we subscribed
3155 * for sending, we woke the tasklet up and removed the
3156 * SUB_RETRY_SEND flag, so the stream_interface would not
3157 * know it has to unsubscribe for send, but the tasklet hasn't
3158 * run yet. Make sure to handle that by explicitely setting
3159 * send_wait to NULL, as nothing else will do it for us.
3160 */
3161 h2s->send_wait = NULL;
Olivier Houchard998410a2019-04-15 19:23:37 +02003162 }
3163
Olivier Houchardf502aca2018-12-14 19:42:40 +01003164 sess = h2s->sess;
Willy Tarreau60935142017-10-16 18:11:19 +02003165 h2c = h2s->h2c;
3166 h2s->cs = NULL;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02003167 h2c->nb_cs--;
Willy Tarreaufa1d3572019-01-31 10:31:51 +01003168 if ((h2c->flags & (H2_CF_IS_BACK|H2_CF_DEM_TOOMANY)) == H2_CF_DEM_TOOMANY &&
3169 !h2_frt_has_too_many_cs(h2c)) {
3170 /* frontend connection was blocking new streams creation */
Willy Tarreauf2101912018-07-19 10:11:38 +02003171 h2c->flags &= ~H2_CF_DEM_TOOMANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003172 h2c_restart_reading(h2c, 1);
Willy Tarreauf2101912018-07-19 10:11:38 +02003173 }
Willy Tarreau60935142017-10-16 18:11:19 +02003174
Willy Tarreau22cf59b2017-11-10 11:42:33 +01003175 /* this stream may be blocked waiting for some data to leave (possibly
3176 * an ES or RST frame), so orphan it in this case.
3177 */
Willy Tarreau3041fcc2018-03-29 15:41:32 +02003178 if (!(cs->conn->flags & CO_FL_ERROR) &&
Willy Tarreaua2b51812018-07-27 09:55:14 +02003179 (h2c->st0 < H2_CS_ERROR) &&
Olivier Houchard16ff2612019-03-21 15:48:46 +01003180 (h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL)) && (h2s->send_wait || h2s->recv_wait))
Willy Tarreau22cf59b2017-11-10 11:42:33 +01003181 return;
3182
Willy Tarreau45f752e2017-10-30 15:44:59 +01003183 if ((h2c->flags & H2_CF_DEM_BLOCK_ANY && h2s->id == h2c->dsi) ||
3184 (h2c->flags & H2_CF_MUX_BLOCK_ANY && h2s->id == h2c->msi)) {
3185 /* unblock the connection if it was blocked on this
3186 * stream.
3187 */
3188 h2c->flags &= ~H2_CF_DEM_BLOCK_ANY;
3189 h2c->flags &= ~H2_CF_MUX_BLOCK_ANY;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02003190 h2c_restart_reading(h2c, 1);
Willy Tarreau45f752e2017-10-30 15:44:59 +01003191 }
3192
Willy Tarreau71049cc2018-03-28 13:56:39 +02003193 h2s_destroy(h2s);
Willy Tarreau60935142017-10-16 18:11:19 +02003194
Olivier Houchard8a786902018-12-15 16:05:40 +01003195 if (h2c->flags & H2_CF_IS_BACK &&
3196 (h2c->proxy->options2 & PR_O2_USE_HTX)) {
Olivier Houchard8a786902018-12-15 16:05:40 +01003197 if (!(h2c->conn->flags &
3198 (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH))) {
3199 if (!h2c->conn->owner) {
Olivier Houchardf502aca2018-12-14 19:42:40 +01003200 h2c->conn->owner = sess;
Olivier Houchard351411f2018-12-27 17:20:54 +01003201 if (!session_add_conn(sess, h2c->conn, h2c->conn->target)) {
3202 h2c->conn->owner = NULL;
3203 if (eb_is_empty(&h2c->streams_by_id)) {
3204 if (!srv_add_to_idle_list(objt_server(h2c->conn->target), h2c->conn))
3205 /* The server doesn't want it, let's kill the connection right away */
3206 h2c->conn->mux->destroy(h2c->conn);
3207 return;
3208 }
3209 }
Olivier Houchard8a786902018-12-15 16:05:40 +01003210 }
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01003211 if (eb_is_empty(&h2c->streams_by_id)) {
3212 if (session_check_idle_conn(h2c->conn->owner, h2c->conn) != 0)
3213 /* At this point either the connection is destroyed, or it's been added to the server idle list, just stop */
3214 return;
3215 }
Olivier Houchard8a786902018-12-15 16:05:40 +01003216 /* Never ever allow to reuse a connection from a non-reuse backend */
3217 if ((h2c->proxy->options & PR_O_REUSE_MASK) == PR_O_REUSE_NEVR)
3218 h2c->conn->flags |= CO_FL_PRIVATE;
Willy Tarreauc234ae32019-05-13 17:56:11 +02003219 if (!LIST_ADDED(&h2c->conn->list) && h2c->nb_streams < h2c->streams_limit) {
Olivier Houchard8a786902018-12-15 16:05:40 +01003220 struct server *srv = objt_server(h2c->conn->target);
3221
3222 if (srv) {
3223 if (h2c->conn->flags & CO_FL_PRIVATE)
3224 LIST_ADD(&srv->priv_conns[tid], &h2c->conn->list);
3225 else
3226 LIST_ADD(&srv->idle_conns[tid], &h2c->conn->list);
3227 }
3228
3229 }
3230 }
3231 }
3232
Willy Tarreaue323f342018-03-28 13:51:45 +02003233 /* We don't want to close right now unless we're removing the
3234 * last stream, and either the connection is in error, or it
3235 * reached the ID already specified in a GOAWAY frame received
3236 * or sent (as seen by last_sid >= 0).
3237 */
Olivier Houchard7a977432019-03-21 15:47:13 +01003238 if (h2c_is_dead(h2c)) {
Willy Tarreaue323f342018-03-28 13:51:45 +02003239 /* no more stream will come, kill it now */
Christopher Faulet73c12072019-04-08 11:23:22 +02003240 h2_release(h2c);
Willy Tarreaue323f342018-03-28 13:51:45 +02003241 }
3242 else if (h2c->task) {
Willy Tarreau73481192019-06-07 08:20:46 +02003243 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
3244 task_queue(h2c->task);
Willy Tarreau60935142017-10-16 18:11:19 +02003245 }
Willy Tarreau62f52692017-10-08 23:01:42 +02003246}
3247
Willy Tarreau88bdba32019-05-13 18:17:53 +02003248/* Performs a synchronous or asynchronous shutr(). */
3249static void h2_do_shutr(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02003250{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003251 struct h2c *h2c = h2s->h2c;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003252 struct wait_event *sw = &h2s->wait_event;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003253
Willy Tarreauf983d002019-05-14 10:40:21 +02003254 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02003255 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003256
Willy Tarreau18059042019-01-31 19:12:48 +01003257 /* a connstream may require us to immediately kill the whole connection
3258 * for example because of a "tcp-request content reject" rule that is
3259 * normally used to limit abuse. In this case we schedule a goaway to
3260 * close the connection.
Willy Tarreau926fa4c2017-11-07 14:42:12 +01003261 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02003262 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01003263 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
3264 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
3265 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
3266 }
Christopher Faulet35757d32019-03-07 15:51:33 +01003267 else if (!(h2s->flags & H2_SF_HEADERS_SENT)) {
3268 /* Nothing was never sent for this stream, so reset with
3269 * REFUSED_STREAM error to let the client retry the
3270 * request.
3271 */
3272 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
3273 }
Willy Tarreau18059042019-01-31 19:12:48 +01003274
Willy Tarreau90c32322017-11-24 08:00:30 +01003275 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003276 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02003277 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01003278
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003279 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchard435ce2d2018-12-03 18:43:16 +01003280 tasklet_wakeup(h2c->wait_event.task);
Willy Tarreau00dd0782018-03-01 16:31:34 +01003281 h2s_close(h2s);
Willy Tarreau88bdba32019-05-13 18:17:53 +02003282 done:
3283 h2s->flags &= ~H2_SF_WANT_SHUTR;
3284 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003285add_to_list:
Willy Tarreauc234ae32019-05-13 17:56:11 +02003286 if (!LIST_ADDED(&h2s->list)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003287 sw->events |= SUB_RETRY_SEND;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003288 if (h2s->flags & H2_SF_BLK_MFCTL) {
3289 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
3290 h2s->send_wait = sw;
3291 } else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM)) {
3292 h2s->send_wait = sw;
3293 LIST_ADDQ(&h2c->send_list, &h2s->list);
3294 }
Willy Tarreaub2e290a2018-03-30 17:35:38 +02003295 }
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003296 /* Let the handler know we want shutr */
Willy Tarreau2c249eb2019-05-13 18:06:17 +02003297 h2s->flags |= H2_SF_WANT_SHUTR;
Willy Tarreau88bdba32019-05-13 18:17:53 +02003298 return;
Willy Tarreau62f52692017-10-08 23:01:42 +02003299}
3300
Willy Tarreau88bdba32019-05-13 18:17:53 +02003301/* Performs a synchronous or asynchronous shutw(). */
3302static void h2_do_shutw(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02003303{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003304 struct h2c *h2c = h2s->h2c;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003305 struct wait_event *sw = &h2s->wait_event;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003306
Willy Tarreauf983d002019-05-14 10:40:21 +02003307 if (h2s->st == H2_SS_CLOSED)
Willy Tarreau88bdba32019-05-13 18:17:53 +02003308 goto done;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003309
Willy Tarreauf983d002019-05-14 10:40:21 +02003310 if (h2s->st != H2_SS_HLOC && h2s->st != H2_SS_ERROR &&
3311 (h2s->flags & H2_SF_HEADERS_SENT)) {
Willy Tarreau58e32082017-11-07 14:41:09 +01003312 /* we can cleanly close using an empty data frame only after headers */
3313
3314 if (!(h2s->flags & (H2_SF_ES_SENT|H2_SF_RST_SENT)) &&
3315 h2_send_empty_data_es(h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02003316 goto add_to_list;
Willy Tarreau58e32082017-11-07 14:41:09 +01003317
3318 if (h2s->st == H2_SS_HREM)
Willy Tarreau00dd0782018-03-01 16:31:34 +01003319 h2s_close(h2s);
Willy Tarreau58e32082017-11-07 14:41:09 +01003320 else
3321 h2s->st = H2_SS_HLOC;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003322 } else {
Willy Tarreau18059042019-01-31 19:12:48 +01003323 /* a connstream may require us to immediately kill the whole connection
3324 * for example because of a "tcp-request content reject" rule that is
3325 * normally used to limit abuse. In this case we schedule a goaway to
3326 * close the connection.
Willy Tarreaua1349f02017-10-31 07:41:55 +01003327 */
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02003328 if ((h2s->flags & H2_SF_KILL_CONN) &&
Willy Tarreau18059042019-01-31 19:12:48 +01003329 !(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
3330 h2c_error(h2c, H2_ERR_ENHANCE_YOUR_CALM);
3331 h2s_error(h2s, H2_ERR_ENHANCE_YOUR_CALM);
3332 }
Christopher Faulet35757d32019-03-07 15:51:33 +01003333 else {
3334 /* Nothing was never sent for this stream, so reset with
3335 * REFUSED_STREAM error to let the client retry the
3336 * request.
3337 */
3338 h2s_error(h2s, H2_ERR_REFUSED_STREAM);
3339 }
Willy Tarreau18059042019-01-31 19:12:48 +01003340
Willy Tarreau90c32322017-11-24 08:00:30 +01003341 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003342 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02003343 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01003344
Willy Tarreau00dd0782018-03-01 16:31:34 +01003345 h2s_close(h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01003346 }
3347
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003348 if (!(h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchard435ce2d2018-12-03 18:43:16 +01003349 tasklet_wakeup(h2c->wait_event.task);
Willy Tarreau88bdba32019-05-13 18:17:53 +02003350 done:
3351 h2s->flags &= ~H2_SF_WANT_SHUTW;
3352 return;
Willy Tarreaub2e290a2018-03-30 17:35:38 +02003353
3354 add_to_list:
Willy Tarreauc234ae32019-05-13 17:56:11 +02003355 if (!LIST_ADDED(&h2s->list)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01003356 sw->events |= SUB_RETRY_SEND;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003357 if (h2s->flags & H2_SF_BLK_MFCTL) {
3358 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
3359 h2s->send_wait = sw;
3360 } else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM)) {
3361 h2s->send_wait = sw;
3362 LIST_ADDQ(&h2c->send_list, &h2s->list);
3363 }
Willy Tarreaub2e290a2018-03-30 17:35:38 +02003364 }
Willy Tarreau2c249eb2019-05-13 18:06:17 +02003365 /* let the handler know we want to shutw */
3366 h2s->flags |= H2_SF_WANT_SHUTW;
Willy Tarreau88bdba32019-05-13 18:17:53 +02003367 return;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003368}
3369
Willy Tarreau749f5ca2019-03-21 19:19:36 +01003370/* This is the tasklet referenced in h2s->wait_event.task, it is used for
3371 * deferred shutdowns when the h2_detach() was done but the mux buffer was full
3372 * and prevented the last frame from being emitted.
3373 */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003374static struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned short state)
3375{
3376 struct h2s *h2s = ctx;
Willy Tarreau88bdba32019-05-13 18:17:53 +02003377 struct h2c *h2c = h2s->h2c;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003378
Olivier Houchardafc7cb82019-03-25 14:08:01 +01003379 LIST_DEL_INIT(&h2s->sending_list);
Willy Tarreau2c249eb2019-05-13 18:06:17 +02003380 if (h2s->flags & H2_SF_WANT_SHUTW)
Willy Tarreau88bdba32019-05-13 18:17:53 +02003381 h2_do_shutw(h2s);
3382
Willy Tarreau2c249eb2019-05-13 18:06:17 +02003383 if (h2s->flags & H2_SF_WANT_SHUTR)
Willy Tarreau88bdba32019-05-13 18:17:53 +02003384 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003385
Willy Tarreau88bdba32019-05-13 18:17:53 +02003386 if (!(h2s->flags & (H2_SF_WANT_SHUTR|H2_SF_WANT_SHUTW))) {
Olivier Houchardafc7cb82019-03-25 14:08:01 +01003387 /* We're done trying to send, remove ourself from the send_list */
Olivier Houchardafc7cb82019-03-25 14:08:01 +01003388 LIST_DEL_INIT(&h2s->list);
Olivier Houchard7a977432019-03-21 15:47:13 +01003389
Willy Tarreau88bdba32019-05-13 18:17:53 +02003390 if (!h2s->cs) {
3391 h2s_destroy(h2s);
3392 if (h2c_is_dead(h2c))
3393 h2_release(h2c);
3394 }
Olivier Houchard7a977432019-03-21 15:47:13 +01003395 }
3396
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003397 return NULL;
Willy Tarreau62f52692017-10-08 23:01:42 +02003398}
3399
Willy Tarreau749f5ca2019-03-21 19:19:36 +01003400/* shutr() called by the conn_stream (mux_ops.shutr) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003401static void h2_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
3402{
3403 struct h2s *h2s = cs->ctx;
3404
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02003405 if (cs->flags & CS_FL_KILL_CONN)
3406 h2s->flags |= H2_SF_KILL_CONN;
3407
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003408 if (!mode)
3409 return;
3410
3411 h2_do_shutr(h2s);
3412}
3413
Willy Tarreau749f5ca2019-03-21 19:19:36 +01003414/* shutw() called by the conn_stream (mux_ops.shutw) */
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003415static void h2_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
3416{
3417 struct h2s *h2s = cs->ctx;
3418
Willy Tarreau3cf69fe2019-05-14 10:44:40 +02003419 if (cs->flags & CS_FL_KILL_CONN)
3420 h2s->flags |= H2_SF_KILL_CONN;
3421
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003422 h2_do_shutw(h2s);
3423}
3424
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01003425/* Decode the payload of a HEADERS frame and produce the equivalent HTTP/1 or
Willy Tarreau86277d42019-01-02 15:36:11 +01003426 * HTX request or response depending on the connection's side. Returns a
3427 * positive value on success, a negative value on failure, or 0 if it couldn't
3428 * proceed. May report connection errors in h2c->errcode if the frame is
3429 * non-decodable and the connection unrecoverable. In absence of connection
3430 * error when a failure is reported, the caller must assume a stream error.
Willy Tarreauea18f862018-12-22 20:19:26 +01003431 *
3432 * The function may fold CONTINUATION frames into the initial HEADERS frame
3433 * by removing padding and next frame header, then moving the CONTINUATION
3434 * frame's payload and adjusting h2c->dfl to match the new aggregated frame,
3435 * leaving a hole between the main frame and the beginning of the next one.
3436 * The possibly remaining incomplete or next frame at the end may be moved
3437 * if the aggregated frame is not deleted, in order to fill the hole. Wrapped
3438 * HEADERS frames are unwrapped into a temporary buffer before decoding.
3439 *
3440 * A buffer at the beginning of processing may look like this :
3441 *
3442 * ,---.---------.-----.--------------.--------------.------.---.
3443 * |///| HEADERS | PAD | CONTINUATION | CONTINUATION | DATA |///|
3444 * `---^---------^-----^--------------^--------------^------^---'
3445 * | | <-----> | |
3446 * area | dpl | wrap
3447 * |<--------------> |
3448 * | dfl |
3449 * |<-------------------------------------------------->|
3450 * head data
3451 *
3452 * Padding is automatically overwritten when folding, participating to the
3453 * hole size after dfl :
3454 *
3455 * ,---.------------------------.-----.--------------.------.---.
3456 * |///| HEADERS : CONTINUATION |/////| CONTINUATION | DATA |///|
3457 * `---^------------------------^-----^--------------^------^---'
3458 * | | <-----> | |
3459 * area | hole | wrap
3460 * |<-----------------------> |
3461 * | dfl |
3462 * |<-------------------------------------------------->|
3463 * head data
3464 *
3465 * Please note that the HEADERS frame is always deprived from its PADLEN byte
3466 * however it may start with the 5 stream-dep+weight bytes in case of PRIORITY
3467 * bit.
Willy Tarreau6cc85a52019-01-02 15:49:20 +01003468 *
3469 * The <flags> field must point to either the stream's flags or to a copy of it
3470 * so that the function can update the following flags :
3471 * - H2_SF_DATA_CLEN when content-length is seen
3472 * - H2_SF_DATA_CHNK when chunking should be used for the H1 conversion
3473 * - H2_SF_HEADERS_RCVD once the frame is successfully decoded
Willy Tarreau88d138e2019-01-02 19:38:14 +01003474 *
3475 * The H2_SF_HEADERS_RCVD flag is also looked at in the <flags> field prior to
3476 * decoding, in order to detect if we're dealing with a headers or a trailers
3477 * block (the trailers block appears after H2_SF_HEADERS_RCVD was seen).
Willy Tarreau13278b42017-10-13 19:23:14 +02003478 */
Willy Tarreau4790f7c2019-01-24 11:33:02 +01003479static 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 +02003480{
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003481 const uint8_t *hdrs = (uint8_t *)b_head(&h2c->dbuf);
Willy Tarreau83061a82018-07-13 11:56:34 +02003482 struct buffer *tmp = get_trash_chunk();
Willy Tarreau59a10fb2017-11-21 20:03:02 +01003483 struct http_hdr list[MAX_HTTP_HDR * 2];
Willy Tarreau83061a82018-07-13 11:56:34 +02003484 struct buffer *copy = NULL;
Willy Tarreau174b06a2018-04-25 18:13:58 +02003485 unsigned int msgf;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01003486 struct htx *htx = NULL;
Willy Tarreauea18f862018-12-22 20:19:26 +01003487 int flen; // header frame len
3488 int hole = 0;
Willy Tarreau86277d42019-01-02 15:36:11 +01003489 int ret = 0;
3490 int outlen;
Willy Tarreau13278b42017-10-13 19:23:14 +02003491 int wrap;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01003492 int try = 0;
Willy Tarreau13278b42017-10-13 19:23:14 +02003493
Willy Tarreauea18f862018-12-22 20:19:26 +01003494next_frame:
3495 if (b_data(&h2c->dbuf) - hole < h2c->dfl)
3496 goto leave; // incomplete input frame
3497
3498 /* No END_HEADERS means there's one or more CONTINUATION frames. In
3499 * this case, we'll try to paste it immediately after the initial
3500 * HEADERS frame payload and kill any possible padding. The initial
3501 * frame's length will be increased to represent the concatenation
3502 * of the two frames. The next frame is read from position <tlen>
3503 * and written at position <flen> (minus padding if some is present).
3504 */
3505 if (unlikely(!(h2c->dff & H2_F_HEADERS_END_HEADERS))) {
3506 struct h2_fh hdr;
3507 int clen; // CONTINUATION frame's payload length
3508
3509 if (!h2_peek_frame_hdr(&h2c->dbuf, h2c->dfl + hole, &hdr)) {
3510 /* no more data, the buffer may be full, either due to
3511 * too large a frame or because of too large a hole that
3512 * we're going to compact at the end.
3513 */
3514 goto leave;
3515 }
3516
3517 if (hdr.ft != H2_FT_CONTINUATION) {
3518 /* RFC7540#6.10: frame of unexpected type */
3519 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
3520 goto fail;
3521 }
3522
3523 if (hdr.sid != h2c->dsi) {
3524 /* RFC7540#6.10: frame of different stream */
3525 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
3526 goto fail;
3527 }
3528
3529 if ((unsigned)hdr.len > (unsigned)global.tune.bufsize) {
3530 /* RFC7540#4.2: invalid frame length */
3531 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
3532 goto fail;
3533 }
3534
3535 /* detect when we must stop aggragating frames */
3536 h2c->dff |= hdr.ff & H2_F_HEADERS_END_HEADERS;
3537
3538 /* Take as much as we can of the CONTINUATION frame's payload */
3539 clen = b_data(&h2c->dbuf) - (h2c->dfl + hole + 9);
3540 if (clen > hdr.len)
3541 clen = hdr.len;
3542
3543 /* Move the frame's payload over the padding, hole and frame
3544 * header. At least one of hole or dpl is null (see diagrams
3545 * above). The hole moves after the new aggragated frame.
3546 */
3547 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole + 9), clen, -(h2c->dpl + hole + 9));
3548 h2c->dfl += clen - h2c->dpl;
3549 hole += h2c->dpl + 9;
3550 h2c->dpl = 0;
3551 goto next_frame;
3552 }
3553
3554 flen = h2c->dfl - h2c->dpl;
Willy Tarreau68472622017-12-11 18:36:37 +01003555
Willy Tarreau13278b42017-10-13 19:23:14 +02003556 /* if the input buffer wraps, take a temporary copy of it (rare) */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003557 wrap = b_wrap(&h2c->dbuf) - b_head(&h2c->dbuf);
Willy Tarreau13278b42017-10-13 19:23:14 +02003558 if (wrap < h2c->dfl) {
Willy Tarreau68dd9852017-07-03 14:44:26 +02003559 copy = alloc_trash_chunk();
3560 if (!copy) {
3561 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
3562 goto fail;
3563 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003564 memcpy(copy->area, b_head(&h2c->dbuf), wrap);
3565 memcpy(copy->area + wrap, b_orig(&h2c->dbuf), h2c->dfl - wrap);
3566 hdrs = (uint8_t *) copy->area;
Willy Tarreau13278b42017-10-13 19:23:14 +02003567 }
3568
Willy Tarreau13278b42017-10-13 19:23:14 +02003569 /* Skip StreamDep and weight for now (we don't support PRIORITY) */
3570 if (h2c->dff & H2_F_HEADERS_PRIORITY) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01003571 if (read_n32(hdrs) == h2c->dsi) {
Willy Tarreau18b86cd2017-12-03 19:24:50 +01003572 /* RFC7540#5.3.1 : stream dep may not depend on itself */
3573 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreaua0d11b62018-09-05 18:30:05 +02003574 goto fail;
Willy Tarreau18b86cd2017-12-03 19:24:50 +01003575 }
3576
Willy Tarreaua01f45e2018-12-31 07:41:24 +01003577 if (flen < 5) {
3578 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
3579 goto fail;
3580 }
3581
Willy Tarreau13278b42017-10-13 19:23:14 +02003582 hdrs += 5; // stream dep = 4, weight = 1
3583 flen -= 5;
3584 }
3585
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01003586 if (!h2_get_buf(h2c, rxbuf)) {
Willy Tarreau937f7602018-02-26 15:22:17 +01003587 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau86277d42019-01-02 15:36:11 +01003588 goto leave;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01003589 }
Willy Tarreau13278b42017-10-13 19:23:14 +02003590
Willy Tarreau937f7602018-02-26 15:22:17 +01003591 /* we can't retry a failed decompression operation so we must be very
3592 * careful not to take any risks. In practice the output buffer is
3593 * always empty except maybe for trailers, in which case we simply have
3594 * to wait for the upper layer to finish consuming what is available.
3595 */
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01003596
3597 if (h2c->proxy->options2 & PR_O2_USE_HTX) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01003598 htx = htx_from_buf(rxbuf);
Willy Tarreau8dbb1702019-01-03 08:52:09 +01003599 if (!htx_is_empty(htx)) {
3600 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau86277d42019-01-02 15:36:11 +01003601 goto leave;
Willy Tarreau8dbb1702019-01-03 08:52:09 +01003602 }
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01003603 } else {
Willy Tarreau8dbb1702019-01-03 08:52:09 +01003604 if (b_data(rxbuf)) {
3605 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau86277d42019-01-02 15:36:11 +01003606 goto leave;
Willy Tarreau8dbb1702019-01-03 08:52:09 +01003607 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01003608
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01003609 rxbuf->head = 0;
3610 try = b_size(rxbuf);
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01003611 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01003612
Willy Tarreau25919232019-01-03 14:48:18 +01003613 /* past this point we cannot roll back in case of error */
Willy Tarreau59a10fb2017-11-21 20:03:02 +01003614 outlen = hpack_decode_frame(h2c->ddht, hdrs, flen, list,
3615 sizeof(list)/sizeof(list[0]), tmp);
3616 if (outlen < 0) {
3617 h2c_error(h2c, H2_ERR_COMPRESSION_ERROR);
3618 goto fail;
3619 }
3620
Willy Tarreau25919232019-01-03 14:48:18 +01003621 /* The PACK decompressor was updated, let's update the input buffer and
3622 * the parser's state to commit these changes and allow us to later
3623 * fail solely on the stream if needed.
3624 */
3625 b_del(&h2c->dbuf, h2c->dfl + hole);
3626 h2c->dfl = hole = 0;
3627 h2c->st0 = H2_CS_FRAME_H;
3628
Willy Tarreau59a10fb2017-11-21 20:03:02 +01003629 /* OK now we have our header list in <list> */
Willy Tarreau880f5802019-01-03 08:10:14 +01003630 msgf = (h2c->dff & H2_F_HEADERS_END_STREAM) ? 0 : H2_MSGF_BODY;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01003631
Willy Tarreau88d138e2019-01-02 19:38:14 +01003632 if (*flags & H2_SF_HEADERS_RCVD)
3633 goto trailers;
3634
3635 /* This is the first HEADERS frame so it's a headers block */
Willy Tarreauc3e18f32018-10-08 14:51:56 +02003636 if (htx) {
3637 /* HTX mode */
3638 if (h2c->flags & H2_CF_IS_BACK)
Willy Tarreau4790f7c2019-01-24 11:33:02 +01003639 outlen = h2_make_htx_response(list, htx, &msgf, body_len);
Willy Tarreauc3e18f32018-10-08 14:51:56 +02003640 else
Willy Tarreau4790f7c2019-01-24 11:33:02 +01003641 outlen = h2_make_htx_request(list, htx, &msgf, body_len);
Willy Tarreauc3e18f32018-10-08 14:51:56 +02003642 } else {
3643 /* HTTP/1 mode */
Willy Tarreau4790f7c2019-01-24 11:33:02 +01003644 outlen = h2_make_h1_request(list, b_tail(rxbuf), try, &msgf, body_len);
Willy Tarreau83195932019-01-03 10:26:23 +01003645 if (outlen > 0)
3646 b_add(rxbuf, outlen);
Willy Tarreauc3e18f32018-10-08 14:51:56 +02003647 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01003648
3649 if (outlen < 0) {
Willy Tarreau25919232019-01-03 14:48:18 +01003650 /* too large headers? this is a stream error only */
Willy Tarreau59a10fb2017-11-21 20:03:02 +01003651 goto fail;
3652 }
Willy Tarreau13278b42017-10-13 19:23:14 +02003653
Willy Tarreau174b06a2018-04-25 18:13:58 +02003654 if (msgf & H2_MSGF_BODY) {
3655 /* a payload is present */
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01003656 if (msgf & H2_MSGF_BODY_CL) {
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01003657 *flags |= H2_SF_DATA_CLEN;
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01003658 if (htx)
3659 htx->extra = *body_len;
3660 }
Olivier Houchard50d660c2018-12-08 00:18:31 +01003661 else if (!(msgf & H2_MSGF_BODY_TUNNEL) && !htx)
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01003662 *flags |= H2_SF_DATA_CHNK;
Willy Tarreau174b06a2018-04-25 18:13:58 +02003663 }
3664
Willy Tarreau88d138e2019-01-02 19:38:14 +01003665 done:
Christopher Faulet0b465482019-02-19 15:14:23 +01003666 /* indicate that a HEADERS frame was received for this stream, except
3667 * for 1xx responses. For 1xx responses, another HEADERS frame is
3668 * expected.
3669 */
3670 if (!(msgf & H2_MSGF_RSP_1XX))
3671 *flags |= H2_SF_HEADERS_RCVD;
Willy Tarreau6cc85a52019-01-02 15:49:20 +01003672
Christopher Fauletb75b5ea2019-05-17 08:37:28 +02003673 if ((h2c->dff & H2_F_HEADERS_END_STREAM)) {
Willy Tarreau88d138e2019-01-02 19:38:14 +01003674 /* Mark the end of message, either using EOM in HTX or with the
3675 * trailing CRLF after the end of trailers. Note that DATA_CHNK
Willy Tarreau2135f912019-05-07 11:17:32 +02003676 * is not set during headers with END_STREAM. For HTX trailers,
3677 * we must not leave an HTX trailers block not followed by an
3678 * EOM block, the two must be atomic. Thus if we fail to emit
3679 * the EOM block we must remove the TLR block we've just added.
Willy Tarreau88d138e2019-01-02 19:38:14 +01003680 */
3681 if (htx) {
Christopher Faulet2d7c5392019-06-03 10:41:26 +02003682 if (!htx_add_endof(htx, HTX_BLK_EOM))
Willy Tarreau88d138e2019-01-02 19:38:14 +01003683 goto fail;
3684 }
3685 else if (*flags & H2_SF_DATA_CHNK) {
3686 if (!b_putblk(rxbuf, "\r\n", 2))
3687 goto fail;
3688 }
3689 }
Willy Tarreau937f7602018-02-26 15:22:17 +01003690
Willy Tarreau86277d42019-01-02 15:36:11 +01003691 /* success */
3692 ret = 1;
3693
Willy Tarreau68dd9852017-07-03 14:44:26 +02003694 leave:
Willy Tarreau86277d42019-01-02 15:36:11 +01003695 /* If there is a hole left and it's not at the end, we are forced to
Willy Tarreauea18f862018-12-22 20:19:26 +01003696 * move the remaining data over it.
3697 */
3698 if (hole) {
3699 if (b_data(&h2c->dbuf) > h2c->dfl + hole)
3700 b_move(&h2c->dbuf, b_peek_ofs(&h2c->dbuf, h2c->dfl + hole),
3701 b_data(&h2c->dbuf) - (h2c->dfl + hole), -hole);
3702 b_sub(&h2c->dbuf, hole);
3703 }
3704
Willy Tarreau97215ca2019-04-29 10:20:21 +02003705 if (b_full(&h2c->dbuf) && h2c->dfl >= b_data(&h2c->dbuf)) {
Willy Tarreauea18f862018-12-22 20:19:26 +01003706 /* too large frames */
3707 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau86277d42019-01-02 15:36:11 +01003708 ret = -1;
Willy Tarreauea18f862018-12-22 20:19:26 +01003709 }
3710
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003711 if (htx)
Willy Tarreau5c8cafa2018-12-23 11:30:42 +01003712 htx_to_buf(htx, rxbuf);
Willy Tarreau68dd9852017-07-03 14:44:26 +02003713 free_trash_chunk(copy);
Willy Tarreau86277d42019-01-02 15:36:11 +01003714 return ret;
3715
Willy Tarreau68dd9852017-07-03 14:44:26 +02003716 fail:
Willy Tarreau86277d42019-01-02 15:36:11 +01003717 ret = -1;
Willy Tarreau68dd9852017-07-03 14:44:26 +02003718 goto leave;
Willy Tarreau88d138e2019-01-02 19:38:14 +01003719
3720 trailers:
3721 /* This is the last HEADERS frame hence a trailer */
3722
3723 if (!(h2c->dff & H2_F_HEADERS_END_STREAM)) {
3724 /* It's a trailer but it's missing ES flag */
3725 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
3726 goto fail;
3727 }
3728
Christopher Faulet54b5e212019-06-04 10:08:28 +02003729 /* Trailers terminate a DATA sequence. In HTX we always handle them. In
3730 * legacy, when using chunks, we have to emit the 0 CRLF marker first
3731 * and then handle the trailers. For other modes, the trailers are
3732 * silently dropped.
Willy Tarreau88d138e2019-01-02 19:38:14 +01003733 */
3734 if (htx) {
Willy Tarreau5255f282019-01-03 18:41:05 +01003735 if (h2_make_htx_trailers(list, htx) <= 0)
3736 goto fail;
Willy Tarreau88d138e2019-01-02 19:38:14 +01003737 }
3738 else if (*flags & H2_SF_DATA_CHNK) {
3739 /* Legacy mode with chunked encoding : we must finalize the
3740 * data block message emit the trailing CRLF */
3741 if (!b_putblk(rxbuf, "0\r\n", 3))
3742 goto fail;
Willy Tarreaue2b05cc2019-01-03 16:18:34 +01003743
3744 outlen = h2_make_h1_trailers(list, b_tail(rxbuf), try);
3745 if (outlen > 0)
3746 b_add(rxbuf, outlen);
3747 else
3748 goto fail;
Willy Tarreau88d138e2019-01-02 19:38:14 +01003749 }
3750
3751 goto done;
Willy Tarreau13278b42017-10-13 19:23:14 +02003752}
3753
Willy Tarreau454f9052017-10-26 19:40:35 +02003754/* Transfer the payload of a DATA frame to the HTTP/1 side. When content-length
3755 * or a tunnel is used, the contents are copied as-is. When chunked encoding is
3756 * in use, a new chunk is emitted for each frame. This is supposed to fit
3757 * because the smallest chunk takes 1 byte for the size, 2 for CRLF, X for the
3758 * data, 2 for the extra CRLF, so that's 5+X, while on the H2 side the smallest
3759 * frame will be 9+X bytes based on the same buffer size. The HTTP/2 frame
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003760 * parser state is automatically updated. Returns > 0 if it could completely
3761 * send the current frame, 0 if it couldn't complete, in which case
3762 * CS_FL_RCV_MORE must be checked to know if some data remain pending (an empty
3763 * DATA frame can return 0 as a valid result). Stream errors are reported in
3764 * h2s->errcode and connection errors in h2c->errcode. The caller must already
3765 * have checked the frame header and ensured that the frame was complete or the
3766 * buffer full. It changes the frame state to FRAME_A once done.
Willy Tarreau454f9052017-10-26 19:40:35 +02003767 */
Willy Tarreau454b57b2018-02-26 15:50:05 +01003768static int h2_frt_transfer_data(struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02003769{
3770 struct h2c *h2c = h2s->h2c;
3771 int block1, block2;
Willy Tarreaud755ea62018-02-26 15:44:54 +01003772 unsigned int flen = 0;
Willy Tarreaueba10f22018-04-25 20:44:22 +02003773 unsigned int chklen = 0;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003774 struct htx *htx = NULL;
Willy Tarreaud755ea62018-02-26 15:44:54 +01003775 struct buffer *csbuf;
Willy Tarreau454f9052017-10-26 19:40:35 +02003776
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003777 h2c->flags &= ~H2_CF_DEM_SFULL;
Willy Tarreau454f9052017-10-26 19:40:35 +02003778
Olivier Houchard638b7992018-08-16 15:41:52 +02003779 csbuf = h2_get_buf(h2c, &h2s->rxbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01003780 if (!csbuf) {
3781 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau454b57b2018-02-26 15:50:05 +01003782 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01003783 }
3784
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003785try_again:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003786 flen = h2c->dfl - h2c->dpl;
Olivier Houchard2f308832018-12-19 15:53:53 +01003787 if (h2c->proxy->options2 & PR_O2_USE_HTX)
3788 htx = htx_from_buf(csbuf);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003789 if (!flen)
Willy Tarreau4a28da12018-01-04 14:41:00 +01003790 goto end_transfer;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003791
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003792 if (flen > b_data(&h2c->dbuf)) {
3793 flen = b_data(&h2c->dbuf);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003794 if (!flen)
Willy Tarreau454b57b2018-02-26 15:50:05 +01003795 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01003796 }
3797
Willy Tarreaua9b77962019-01-31 07:23:00 +01003798 if (htx) {
Willy Tarreau0a7ef022019-05-28 10:30:11 +02003799 unsigned int sent;
3800
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003801 block1 = htx_free_data_space(htx);
3802 if (!block1) {
3803 h2c->flags |= H2_CF_DEM_SFULL;
3804 goto fail;
3805 }
3806 if (flen > block1)
3807 flen = block1;
3808
3809 /* here, flen is the max we can copy into the output buffer */
3810 block1 = b_contig_data(&h2c->dbuf, 0);
3811 if (flen > block1)
3812 flen = block1;
3813
Willy Tarreau0a7ef022019-05-28 10:30:11 +02003814 sent = htx_add_data(htx, ist2(b_head(&h2c->dbuf), flen));
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003815
3816 b_del(&h2c->dbuf, flen);
3817 h2c->dfl -= flen;
3818 h2c->rcvd_c += flen;
3819 h2c->rcvd_s += flen; // warning, this can also affect the closed streams!
Willy Tarreau1915ca22019-01-24 11:49:37 +01003820
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01003821 if (h2s->flags & H2_SF_DATA_CLEN) {
Willy Tarreau1915ca22019-01-24 11:49:37 +01003822 h2s->body_len -= flen;
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01003823 htx->extra = h2s->body_len;
3824 }
Willy Tarreau0a7ef022019-05-28 10:30:11 +02003825
3826 if (sent < flen) {
3827 h2c->flags |= H2_CF_DEM_SFULL;
3828 goto fail;
3829 }
3830
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003831 goto try_again;
3832 }
Willy Tarreau455d5682019-05-24 19:42:18 +02003833 else if (unlikely(b_space_wraps(csbuf) &&
3834 flen + chklen <= b_room(csbuf) &&
3835 b_data(csbuf) <= MAX_DATA_REALIGN)) {
3836 /* it doesn't fit in a single block and the buffer is fragmented, if there are
3837 * not too many data in the buffer, let's defragment it and try
3838 * again.
Willy Tarreaud755ea62018-02-26 15:44:54 +01003839 */
3840 b_slow_realign(csbuf, trash.area, 0);
Willy Tarreau454f9052017-10-26 19:40:35 +02003841 }
3842
Willy Tarreaueba10f22018-04-25 20:44:22 +02003843 /* chunked-encoding requires more room */
3844 if (h2s->flags & H2_SF_DATA_CHNK) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01003845 chklen = MIN(flen, b_room(csbuf));
Willy Tarreaueba10f22018-04-25 20:44:22 +02003846 chklen = (chklen < 16) ? 1 : (chklen < 256) ? 2 :
3847 (chklen < 4096) ? 3 : (chklen < 65536) ? 4 :
3848 (chklen < 1048576) ? 4 : 8;
3849 chklen += 4; // CRLF, CRLF
3850 }
3851
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003852 /* does it fit in output buffer or should we wait ? */
Willy Tarreaud755ea62018-02-26 15:44:54 +01003853 if (flen + chklen > b_room(csbuf)) {
3854 if (chklen >= b_room(csbuf)) {
3855 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau454b57b2018-02-26 15:50:05 +01003856 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01003857 }
3858 flen = b_room(csbuf) - chklen;
Willy Tarreaueba10f22018-04-25 20:44:22 +02003859 }
3860
3861 if (h2s->flags & H2_SF_DATA_CHNK) {
3862 /* emit the chunk size */
3863 unsigned int chksz = flen;
3864 char str[10];
3865 char *beg;
3866
3867 beg = str + sizeof(str);
3868 *--beg = '\n';
3869 *--beg = '\r';
3870 do {
3871 *--beg = hextab[chksz & 0xF];
3872 } while (chksz >>= 4);
Willy Tarreaud755ea62018-02-26 15:44:54 +01003873 b_putblk(csbuf, beg, str + sizeof(str) - beg);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003874 }
3875
Willy Tarreau454f9052017-10-26 19:40:35 +02003876 /* Block1 is the length of the first block before the buffer wraps,
3877 * block2 is the optional second block to reach the end of the frame.
3878 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003879 block1 = b_contig_data(&h2c->dbuf, 0);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003880 if (block1 > flen)
3881 block1 = flen;
Willy Tarreau454f9052017-10-26 19:40:35 +02003882 block2 = flen - block1;
3883
3884 if (block1)
Willy Tarreaud755ea62018-02-26 15:44:54 +01003885 b_putblk(csbuf, b_head(&h2c->dbuf), block1);
Willy Tarreau454f9052017-10-26 19:40:35 +02003886
3887 if (block2)
Willy Tarreaud755ea62018-02-26 15:44:54 +01003888 b_putblk(csbuf, b_peek(&h2c->dbuf, block1), block2);
Willy Tarreau454f9052017-10-26 19:40:35 +02003889
Willy Tarreaueba10f22018-04-25 20:44:22 +02003890 if (h2s->flags & H2_SF_DATA_CHNK) {
3891 /* emit the CRLF */
Willy Tarreaud755ea62018-02-26 15:44:54 +01003892 b_putblk(csbuf, "\r\n", 2);
Willy Tarreaueba10f22018-04-25 20:44:22 +02003893 }
3894
Willy Tarreau454f9052017-10-26 19:40:35 +02003895 /* now mark the input data as consumed (will be deleted from the buffer
3896 * by the caller when seeing FRAME_A after sending the window update).
3897 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003898 b_del(&h2c->dbuf, flen);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003899 h2c->dfl -= flen;
3900 h2c->rcvd_c += flen;
3901 h2c->rcvd_s += flen; // warning, this can also affect the closed streams!
3902
Willy Tarreau1915ca22019-01-24 11:49:37 +01003903 if (h2s->flags & H2_SF_DATA_CLEN)
3904 h2s->body_len -= flen;
3905
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003906 if (h2c->dfl > h2c->dpl) {
3907 /* more data available, transfer stalled on stream full */
Willy Tarreaud755ea62018-02-26 15:44:54 +01003908 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau454b57b2018-02-26 15:50:05 +01003909 goto fail;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003910 }
3911
Willy Tarreau4a28da12018-01-04 14:41:00 +01003912 end_transfer:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003913 /* here we're done with the frame, all the payload (except padding) was
3914 * transferred.
3915 */
Willy Tarreaueba10f22018-04-25 20:44:22 +02003916
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003917 if (h2c->dff & H2_F_DATA_END_STREAM) {
3918 if (htx) {
3919 if (!htx_add_endof(htx, HTX_BLK_EOM)) {
3920 h2c->flags |= H2_CF_DEM_SFULL;
3921 goto fail;
3922 }
Willy Tarreaud755ea62018-02-26 15:44:54 +01003923 }
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003924 else if (h2s->flags & H2_SF_DATA_CHNK) {
3925 /* emit the trailing 0 CRLF CRLF */
3926 if (b_room(csbuf) < 5) {
3927 h2c->flags |= H2_CF_DEM_SFULL;
3928 goto fail;
3929 }
3930 chklen += 5;
3931 b_putblk(csbuf, "0\r\n\r\n", 5);
3932 }
Willy Tarreaueba10f22018-04-25 20:44:22 +02003933 }
3934
Willy Tarreaud1023bb2018-03-22 16:53:12 +01003935 h2c->rcvd_c += h2c->dpl;
3936 h2c->rcvd_s += h2c->dpl;
3937 h2c->dpl = 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02003938 h2c->st0 = H2_CS_FRAME_A; // send the corresponding window update
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003939 if (htx)
3940 htx_to_buf(htx, csbuf);
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003941 return 1;
Willy Tarreau454b57b2018-02-26 15:50:05 +01003942 fail:
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003943 if (htx)
3944 htx_to_buf(htx, csbuf);
Willy Tarreau454b57b2018-02-26 15:50:05 +01003945 return 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02003946}
3947
Willy Tarreau5dd17352018-06-14 13:33:30 +02003948/* Try to send a HEADERS frame matching HTTP/1 response present at offset <ofs>
3949 * and for <max> bytes in buffer <buf> for the H2 stream <h2s>. Returns the
3950 * number of bytes sent. The caller must check the stream's status to detect
3951 * any error which might have happened subsequently to a successful send.
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003952 */
Willy Tarreau206ba832018-06-14 15:27:31 +02003953static size_t h2s_frt_make_resp_headers(struct h2s *h2s, const struct buffer *buf, size_t ofs, size_t max)
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003954{
3955 struct http_hdr list[MAX_HTTP_HDR];
3956 struct h2c *h2c = h2s->h2c;
Willy Tarreaua40704a2018-09-11 13:52:04 +02003957 struct h1m *h1m = &h2s->h1m;
Willy Tarreau83061a82018-07-13 11:56:34 +02003958 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02003959 struct buffer *mbuf;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02003960 union h1_sl sl;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003961 int es_now = 0;
3962 int ret = 0;
3963 int hdr;
3964
3965 if (h2c_mux_busy(h2c, h2s)) {
3966 h2s->flags |= H2_SF_BLK_MBUSY;
3967 return 0;
3968 }
3969
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003970 /* First, try to parse the H1 response and index it into <list>.
3971 * NOTE! Since it comes from haproxy, we *know* that a response header
3972 * block does not wrap and we can safely read it this way without
3973 * having to realign the buffer.
3974 */
Willy Tarreau5dd17352018-06-14 13:33:30 +02003975 ret = h1_headers_to_hdr_list(b_peek(buf, ofs), b_peek(buf, ofs) + max,
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02003976 list, sizeof(list)/sizeof(list[0]), h1m, &sl);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003977 if (ret <= 0) {
Willy Tarreauf13ef962017-11-02 15:14:19 +01003978 /* incomplete or invalid response, this is abnormal coming from
3979 * haproxy and may only result in a bad errorfile or bad Lua code
3980 * so that won't be fixed, raise an error now.
3981 *
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003982 * FIXME: we should instead add the ability to only return a
3983 * 502 bad gateway. But in theory this is not supposed to
3984 * happen.
3985 */
3986 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
3987 ret = 0;
3988 goto end;
3989 }
3990
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02003991 h2s->status = sl.st.status;
Willy Tarreaudb72da02018-09-13 11:52:20 +02003992
3993 /* certain statuses have no body or an empty one, regardless of
3994 * what the headers say.
3995 */
3996 if (sl.st.status >= 100 && sl.st.status < 200) {
3997 h1m->flags &= ~(H1_MF_CLEN | H1_MF_CHNK);
3998 h1m->curr_len = h1m->body_len = 0;
3999 }
4000 else if (sl.st.status == 204 || sl.st.status == 304) {
4001 /* no contents, claim c-len is present and set to zero */
4002 h1m->flags &= ~H1_MF_CHNK;
4003 h1m->flags |= H1_MF_CLEN;
4004 h1m->curr_len = h1m->body_len = 0;
4005 }
4006
Willy Tarreaubcc45952019-05-26 10:05:50 +02004007 mbuf = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02004008 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02004009 if (!h2_get_buf(h2c, mbuf)) {
4010 h2c->flags |= H2_CF_MUX_MALLOC;
4011 h2s->flags |= H2_SF_BLK_MROOM;
4012 return 0;
4013 }
4014
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004015 chunk_reset(&outbuf);
4016
4017 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004018 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
4019 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004020 break;
4021 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02004022 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004023 }
4024
Willy Tarreaub5b7d4a2018-09-12 18:51:18 +02004025 if (outbuf.size < 9)
4026 goto full;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004027
4028 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004029 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
4030 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4031 outbuf.data = 9;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004032
4033 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01004034 if (unlikely(list[0].v.len != 3)) {
Willy Tarreaua87f2022017-11-09 11:23:00 +01004035 /* this is an unparsable response */
4036 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
4037 ret = 0;
4038 goto end;
4039 }
Willy Tarreauaafdf582018-12-10 18:06:40 +01004040
4041 if (!hpack_encode_str_status(&outbuf, h2s->status, list[0].v)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004042 if (b_space_wraps(mbuf))
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004043 goto realign_again;
Willy Tarreaub5b7d4a2018-09-12 18:51:18 +02004044 goto full;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004045 }
4046
4047 /* encode all headers, stop at empty name */
4048 for (hdr = 1; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
Willy Tarreaua76e4c22017-11-24 08:17:28 +01004049 /* these ones do not exist in H2 and must be dropped. */
4050 if (isteq(list[hdr].n, ist("connection")) ||
4051 isteq(list[hdr].n, ist("proxy-connection")) ||
4052 isteq(list[hdr].n, ist("keep-alive")) ||
4053 isteq(list[hdr].n, ist("upgrade")) ||
4054 isteq(list[hdr].n, ist("transfer-encoding")))
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004055 continue;
4056
4057 if (isteq(list[hdr].n, ist("")))
4058 break; // end
4059
4060 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
4061 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004062 if (b_space_wraps(mbuf))
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004063 goto realign_again;
Willy Tarreaub5b7d4a2018-09-12 18:51:18 +02004064 goto full;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004065 }
4066 }
4067
4068 /* we may need to add END_STREAM */
Willy Tarreau927b88b2019-03-04 08:03:25 +01004069 if (((h1m->flags & H1_MF_CLEN) && !h1m->body_len) || !h2s->cs || h2s->cs->flags & CS_FL_SHW)
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004070 es_now = 1;
4071
4072 /* update the frame's size */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004073 h2_set_frame_size(outbuf.area, outbuf.data - 9);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004074
4075 if (es_now)
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004076 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004077
4078 /* consume incoming H1 response */
Willy Tarreau5dd17352018-06-14 13:33:30 +02004079 max -= ret;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004080
4081 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004082 b_add(mbuf, outbuf.data);
Willy Tarreau67434202017-11-06 20:20:51 +01004083 h2s->flags |= H2_SF_HEADERS_SENT;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004084
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004085 if (es_now) {
Willy Tarreau35a62702018-02-27 15:37:25 +01004086 // trim any possibly pending data (eg: inconsistent content-length)
Willy Tarreau5dd17352018-06-14 13:33:30 +02004087 ret += max;
Willy Tarreau35a62702018-02-27 15:37:25 +01004088
Willy Tarreau801250e2018-09-11 11:45:04 +02004089 h1m->state = H1_MSG_DONE;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004090 h2s->flags |= H2_SF_ES_SENT;
4091 if (h2s->st == H2_SS_OPEN)
4092 h2s->st = H2_SS_HLOC;
4093 else
Willy Tarreau00dd0782018-03-01 16:31:34 +01004094 h2s_close(h2s);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004095 }
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02004096 else if (h2s->status >= 100 && h2s->status < 200) {
Willy Tarreau87285592017-11-29 15:41:32 +01004097 /* we'll let the caller check if it has more headers to send */
Willy Tarreau7f437ff2018-09-11 13:51:19 +02004098 h1m_init_res(h1m);
Willy Tarreau9b8cd1f2018-09-12 09:24:38 +02004099 h1m->err_pos = -1; // don't care about errors on the response path
Willy Tarreaueb528db2018-09-12 09:54:00 +02004100 h2s->h1m.flags |= H1_MF_TOLOWER;
Willy Tarreau87285592017-11-29 15:41:32 +01004101 goto end;
Willy Tarreauc199faf2017-10-31 08:35:27 +01004102 }
Willy Tarreau001823c2018-09-12 17:25:32 +02004103
4104 /* now the h1m state is either H1_MSG_CHUNK_SIZE or H1_MSG_DATA */
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004105
4106 end:
Dirkjan Bussinkc26c72d2018-09-14 14:30:25 +02004107 //fprintf(stderr, "[%d] sent simple H2 response (sid=%d) = %d bytes (%d in, ep=%u, es=%s)\n", h2c->st0, h2s->id, outbuf.len, ret, h1m->err_pos, h1m_state_str(h1m->err_state));
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004108 return ret;
Willy Tarreaub5b7d4a2018-09-12 18:51:18 +02004109 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02004110 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
4111 goto retry;
Willy Tarreaub5b7d4a2018-09-12 18:51:18 +02004112 h1m_init_res(h1m);
4113 h1m->err_pos = -1; // don't care about errors on the response path
4114 h2c->flags |= H2_CF_MUX_MFULL;
4115 h2s->flags |= H2_SF_BLK_MROOM;
4116 ret = 0;
4117 goto end;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004118}
4119
Willy Tarreau5dd17352018-06-14 13:33:30 +02004120/* Try to send a DATA frame matching HTTP/1 response present at offset <ofs>
4121 * for up to <max> bytes in response buffer <buf>, for stream <h2s>. Returns
4122 * the number of bytes sent. The caller must check the stream's status to
4123 * detect any error which might have happened subsequently to a successful send.
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004124 */
Willy Tarreau206ba832018-06-14 15:27:31 +02004125static size_t h2s_frt_make_resp_data(struct h2s *h2s, const struct buffer *buf, size_t ofs, size_t max)
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004126{
4127 struct h2c *h2c = h2s->h2c;
Willy Tarreaua40704a2018-09-11 13:52:04 +02004128 struct h1m *h1m = &h2s->h1m;
Willy Tarreau83061a82018-07-13 11:56:34 +02004129 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02004130 struct buffer *mbuf;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004131 int ret = 0;
Willy Tarreau1dc41e72018-06-14 13:21:28 +02004132 size_t total = 0;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004133 int es_now = 0;
4134 int size = 0;
Willy Tarreau206ba832018-06-14 15:27:31 +02004135 const char *blk1, *blk2;
Willy Tarreau55f3ce12018-07-18 11:49:27 +02004136 size_t len1, len2;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004137
4138 if (h2c_mux_busy(h2c, h2s)) {
4139 h2s->flags |= H2_SF_BLK_MBUSY;
4140 goto end;
4141 }
4142
Willy Tarreaubcc45952019-05-26 10:05:50 +02004143 mbuf = br_tail(h2c->mbuf);
Willy Tarreau9c218e72019-05-26 10:08:28 +02004144 retry:
Willy Tarreaubcc45952019-05-26 10:05:50 +02004145 if (!h2_get_buf(h2c, mbuf)) {
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004146 h2c->flags |= H2_CF_MUX_MALLOC;
4147 h2s->flags |= H2_SF_BLK_MROOM;
4148 goto end;
4149 }
4150
4151 new_frame:
Willy Tarreau5dd17352018-06-14 13:33:30 +02004152 if (!max)
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004153 goto end;
4154
4155 chunk_reset(&outbuf);
4156
4157 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004158 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
4159 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004160 break;
4161 realign_again:
Willy Tarreau06ae84a2018-12-12 09:17:21 +01004162 /* If there are pending data in the output buffer, and we have
4163 * less than 1/4 of the mbuf's size and everything fits, we'll
4164 * still perform a copy anyway. Otherwise we'll pretend the mbuf
4165 * is full and wait, to save some slow realign calls.
4166 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004167 if ((max + 9 > b_room(mbuf) || max >= b_size(mbuf) / 4)) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02004168 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
4169 goto retry;
Willy Tarreau06ae84a2018-12-12 09:17:21 +01004170 h2c->flags |= H2_CF_MUX_MFULL;
4171 h2s->flags |= H2_SF_BLK_MROOM;
4172 goto end;
4173 }
4174
Willy Tarreaubcc45952019-05-26 10:05:50 +02004175 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004176 }
4177
4178 if (outbuf.size < 9) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02004179 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
4180 goto retry;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004181 h2c->flags |= H2_CF_MUX_MFULL;
4182 h2s->flags |= H2_SF_BLK_MROOM;
4183 goto end;
4184 }
4185
4186 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004187 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
4188 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4189 outbuf.data = 9;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004190
4191 switch (h1m->flags & (H1_MF_CLEN|H1_MF_CHNK)) {
4192 case 0: /* no content length, read till SHUTW */
Willy Tarreau5dd17352018-06-14 13:33:30 +02004193 size = max;
Willy Tarreau13e4e942017-12-14 10:55:21 +01004194 h1m->curr_len = size;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004195 break;
4196 case H1_MF_CLEN: /* content-length: read only h2m->body_len */
Willy Tarreau5dd17352018-06-14 13:33:30 +02004197 size = max;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004198 if ((long long)size > h1m->curr_len)
4199 size = h1m->curr_len;
4200 break;
4201 default: /* te:chunked : parse chunks */
Willy Tarreau801250e2018-09-11 11:45:04 +02004202 if (h1m->state == H1_MSG_CHUNK_CRLF) {
Willy Tarreauc0973c62018-06-14 15:53:21 +02004203 ret = h1_skip_chunk_crlf(buf, ofs, ofs + max);
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004204 if (!ret)
4205 goto end;
4206
4207 if (ret < 0) {
4208 /* FIXME: bad contents. how to proceed here when we're in H2 ? */
Willy Tarreau25173a72018-09-12 09:05:16 +02004209 h1m->err_pos = ofs + max + ret;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004210 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
4211 goto end;
4212 }
Willy Tarreau5dd17352018-06-14 13:33:30 +02004213 max -= ret;
4214 ofs += ret;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004215 total += ret;
Willy Tarreau801250e2018-09-11 11:45:04 +02004216 h1m->state = H1_MSG_CHUNK_SIZE;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004217 }
4218
Willy Tarreau801250e2018-09-11 11:45:04 +02004219 if (h1m->state == H1_MSG_CHUNK_SIZE) {
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004220 unsigned int chunk;
Willy Tarreau84d6b7a2018-06-14 15:59:05 +02004221 ret = h1_parse_chunk_size(buf, ofs, ofs + max, &chunk);
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004222 if (!ret)
4223 goto end;
4224
4225 if (ret < 0) {
4226 /* FIXME: bad contents. how to proceed here when we're in H2 ? */
Willy Tarreau25173a72018-09-12 09:05:16 +02004227 h1m->err_pos = ofs + max + ret;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004228 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
4229 goto end;
4230 }
4231
4232 size = chunk;
4233 h1m->curr_len = chunk;
4234 h1m->body_len += chunk;
Willy Tarreau5dd17352018-06-14 13:33:30 +02004235 max -= ret;
4236 ofs += ret;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004237 total += ret;
Willy Tarreau801250e2018-09-11 11:45:04 +02004238 h1m->state = size ? H1_MSG_DATA : H1_MSG_TRAILERS;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004239 if (!size)
4240 goto send_empty;
4241 }
4242
4243 /* in MSG_DATA state, continue below */
4244 size = h1m->curr_len;
4245 break;
4246 }
4247
4248 /* we have in <size> the exact number of bytes we need to copy from
4249 * the H1 buffer. We need to check this against the connection's and
4250 * the stream's send windows, and to ensure that this fits in the max
4251 * frame size and in the buffer's available space minus 9 bytes (for
4252 * the frame header). The connection's flow control is applied last so
4253 * that we can use a separate list of streams which are immediately
4254 * unblocked on window opening. Note: we don't implement padding.
4255 */
4256
Willy Tarreau5dd17352018-06-14 13:33:30 +02004257 if (size > max)
4258 size = max;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004259
4260 if (size > h2s->mws)
4261 size = h2s->mws;
4262
4263 if (size <= 0) {
4264 h2s->flags |= H2_SF_BLK_SFCTL;
Willy Tarreauc234ae32019-05-13 17:56:11 +02004265 if (LIST_ADDED(&h2s->list))
Olivier Houchardbfe2a832019-05-10 14:02:21 +02004266 LIST_DEL_INIT(&h2s->list);
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004267 goto end;
4268 }
4269
4270 if (h2c->mfs && size > h2c->mfs)
4271 size = h2c->mfs;
4272
4273 if (size + 9 > outbuf.size) {
Willy Tarreau455d5682019-05-24 19:42:18 +02004274 /* It doesn't fit at once. If it at least fits once split and
4275 * the amount of data to move is low, let's defragment the
4276 * buffer now.
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004277 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004278 if (b_space_wraps(mbuf) &&
4279 (size + 9 <= b_room(mbuf)) &&
4280 b_data(mbuf) <= MAX_DATA_REALIGN)
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004281 goto realign_again;
4282 size = outbuf.size - 9;
4283 }
4284
4285 if (size <= 0) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02004286 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
4287 goto retry;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004288 h2c->flags |= H2_CF_MUX_MFULL;
4289 h2s->flags |= H2_SF_BLK_MROOM;
4290 goto end;
4291 }
4292
4293 if (size > h2c->mws)
4294 size = h2c->mws;
4295
4296 if (size <= 0) {
4297 h2s->flags |= H2_SF_BLK_MFCTL;
4298 goto end;
4299 }
4300
4301 /* copy whatever we can */
4302 blk1 = blk2 = NULL; // silence a maybe-uninitialized warning
Willy Tarreau5dd17352018-06-14 13:33:30 +02004303 ret = b_getblk_nc(buf, &blk1, &len1, &blk2, &len2, ofs, max);
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004304 if (ret == 1)
4305 len2 = 0;
4306
4307 if (!ret || len1 + len2 < size) {
4308 /* FIXME: must normally never happen */
4309 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
4310 goto end;
4311 }
4312
4313 /* limit len1/len2 to size */
4314 if (len1 + len2 > size) {
4315 int sub = len1 + len2 - size;
4316
4317 if (len2 > sub)
4318 len2 -= sub;
4319 else {
4320 sub -= len2;
4321 len2 = 0;
4322 len1 -= sub;
4323 }
4324 }
4325
4326 /* now let's copy this this into the output buffer */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004327 memcpy(outbuf.area + 9, blk1, len1);
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004328 if (len2)
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004329 memcpy(outbuf.area + 9 + len1, blk2, len2);
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004330
4331 send_empty:
4332 /* we may need to add END_STREAM */
4333 /* FIXME: we should also detect shutdown(w) below, but how ? Maybe we
4334 * could rely on the MSG_MORE flag as a hint for this ?
Willy Tarreau00610962018-07-19 10:58:28 +02004335 *
4336 * FIXME: what we do here is not correct because we send end_stream
4337 * before knowing if we'll have to send a HEADERS frame for the
4338 * trailers. More importantly we're not consuming the trailing CRLF
4339 * after the end of trailers, so it will be left to the caller to
4340 * eat it. The right way to do it would be to measure trailers here
4341 * and to send ES only if there are no trailers.
4342 *
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004343 */
4344 if (((h1m->flags & H1_MF_CLEN) && !(h1m->curr_len - size)) ||
Willy Tarreau801250e2018-09-11 11:45:04 +02004345 !h1m->curr_len || h1m->state >= H1_MSG_DONE)
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004346 es_now = 1;
4347
4348 /* update the frame's size */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004349 h2_set_frame_size(outbuf.area, size);
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004350
4351 if (es_now)
Willy Tarreau843b7cb2018-07-13 10:54:26 +02004352 outbuf.area[4] |= H2_F_DATA_END_STREAM;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004353
4354 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004355 b_add(mbuf, size + 9);
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004356
4357 /* consume incoming H1 response */
4358 if (size > 0) {
Willy Tarreau5dd17352018-06-14 13:33:30 +02004359 max -= size;
4360 ofs += size;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004361 total += size;
4362 h1m->curr_len -= size;
4363 h2s->mws -= size;
4364 h2c->mws -= size;
4365
4366 if (size && !h1m->curr_len && (h1m->flags & H1_MF_CHNK)) {
Willy Tarreau801250e2018-09-11 11:45:04 +02004367 h1m->state = H1_MSG_CHUNK_CRLF;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004368 goto new_frame;
4369 }
4370 }
4371
4372 if (es_now) {
4373 if (h2s->st == H2_SS_OPEN)
4374 h2s->st = H2_SS_HLOC;
4375 else
Willy Tarreau00dd0782018-03-01 16:31:34 +01004376 h2s_close(h2s);
Willy Tarreau9d89ac82017-10-31 17:15:59 +01004377
Willy Tarreau35a62702018-02-27 15:37:25 +01004378 if (!(h1m->flags & H1_MF_CHNK)) {
4379 // trim any possibly pending data (eg: inconsistent content-length)
Willy Tarreau5dd17352018-06-14 13:33:30 +02004380 total += max;
4381 ofs += max;
4382 max = 0;
Willy Tarreau35a62702018-02-27 15:37:25 +01004383
Willy Tarreau801250e2018-09-11 11:45:04 +02004384 h1m->state = H1_MSG_DONE;
Willy Tarreau35a62702018-02-27 15:37:25 +01004385 }
Willy Tarreau9d89ac82017-10-31 17:15:59 +01004386
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004387 h2s->flags |= H2_SF_ES_SENT;
4388 }
4389
4390 end:
Dirkjan Bussinkc26c72d2018-09-14 14:30:25 +02004391 trace("[%d] sent simple H2 DATA response (sid=%d) = %d bytes out (%u in, st=%s, ep=%u, es=%s, h2cws=%d h2sws=%d) data=%u", h2c->st0, h2s->id, size+9, (unsigned int)total, h1m_state_str(h1m->state), h1m->err_pos, h1m_state_str(h1m->err_state), h2c->mws, h2s->mws, (unsigned int)b_data(buf));
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004392 return total;
4393}
4394
Willy Tarreau115e83b2018-12-01 19:17:53 +01004395/* Try to send a HEADERS frame matching HTX response present in HTX message
4396 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
4397 * must check the stream's status to detect any error which might have happened
4398 * subsequently to a successful send. The htx blocks are automatically removed
4399 * from the message. The htx message is assumed to be valid since produced from
4400 * the internal code, hence it contains a start line, an optional series of
4401 * header blocks and an end of header, otherwise an invalid frame could be
4402 * emitted and the resulting htx message could be left in an inconsistent state.
4403 */
4404static size_t h2s_htx_frt_make_resp_headers(struct h2s *h2s, struct htx *htx)
4405{
4406 struct http_hdr list[MAX_HTTP_HDR];
4407 struct h2c *h2c = h2s->h2c;
4408 struct htx_blk *blk;
4409 struct htx_blk *blk_end;
4410 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02004411 struct buffer *mbuf;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004412 struct htx_sl *sl;
4413 enum htx_blk_type type;
4414 int es_now = 0;
4415 int ret = 0;
4416 int hdr;
4417 int idx;
4418
4419 if (h2c_mux_busy(h2c, h2s)) {
4420 h2s->flags |= H2_SF_BLK_MBUSY;
4421 return 0;
4422 }
4423
Willy Tarreau115e83b2018-12-01 19:17:53 +01004424 /* determine the first block which must not be deleted, blk_end may
4425 * be NULL if all blocks have to be deleted.
4426 */
4427 idx = htx_get_head(htx);
4428 blk_end = NULL;
4429 while (idx != -1) {
4430 type = htx_get_blk_type(htx_get_blk(htx, idx));
4431 idx = htx_get_next(htx, idx);
4432 if (type == HTX_BLK_EOH) {
4433 if (idx != -1)
4434 blk_end = htx_get_blk(htx, idx);
4435 break;
4436 }
4437 }
4438
4439 /* get the start line, we do have one */
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004440 blk = htx_get_head_blk(htx);
4441 BUG_ON(htx_get_blk_type(blk) != HTX_BLK_RES_SL);
4442 ALREADY_CHECKED(blk);
4443 sl = htx_get_blk_ptr(htx, blk);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004444 h2s->status = sl->info.res.status;
Willy Tarreauaafdf582018-12-10 18:06:40 +01004445 if (h2s->status < 100 || h2s->status > 999)
4446 goto fail;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004447
4448 /* and the rest of the headers, that we dump starting at header 0 */
4449 hdr = 0;
4450
Willy Tarreau8e162ee2018-12-06 14:07:27 +01004451 idx = htx_get_head(htx); // returns the SL that we skip
Willy Tarreau115e83b2018-12-01 19:17:53 +01004452 while ((idx = htx_get_next(htx, idx)) != -1) {
4453 blk = htx_get_blk(htx, idx);
4454 type = htx_get_blk_type(blk);
4455
4456 if (type == HTX_BLK_UNUSED)
4457 continue;
4458
4459 if (type != HTX_BLK_HDR)
4460 break;
4461
4462 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1))
4463 goto fail;
4464
4465 list[hdr].n = htx_get_blk_name(htx, blk);
4466 list[hdr].v = htx_get_blk_value(htx, blk);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004467 hdr++;
4468 }
4469
4470 /* marker for end of headers */
4471 list[hdr].n = ist("");
4472
4473 if (h2s->status == 204 || h2s->status == 304) {
4474 /* no contents, claim c-len is present and set to zero */
4475 es_now = 1;
4476 }
4477
Willy Tarreau9c218e72019-05-26 10:08:28 +02004478 mbuf = br_tail(h2c->mbuf);
4479 retry:
4480 if (!h2_get_buf(h2c, mbuf)) {
4481 h2c->flags |= H2_CF_MUX_MALLOC;
4482 h2s->flags |= H2_SF_BLK_MROOM;
4483 return 0;
4484 }
4485
Willy Tarreau115e83b2018-12-01 19:17:53 +01004486 chunk_reset(&outbuf);
4487
4488 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004489 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
4490 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004491 break;
4492 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02004493 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau115e83b2018-12-01 19:17:53 +01004494 }
4495
4496 if (outbuf.size < 9)
4497 goto full;
4498
4499 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
4500 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
4501 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4502 outbuf.data = 9;
4503
4504 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01004505 if (!hpack_encode_int_status(&outbuf, h2s->status)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004506 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004507 goto realign_again;
4508 goto full;
4509 }
4510
4511 /* encode all headers, stop at empty name */
4512 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
4513 /* these ones do not exist in H2 and must be dropped. */
4514 if (isteq(list[hdr].n, ist("connection")) ||
4515 isteq(list[hdr].n, ist("proxy-connection")) ||
4516 isteq(list[hdr].n, ist("keep-alive")) ||
4517 isteq(list[hdr].n, ist("upgrade")) ||
4518 isteq(list[hdr].n, ist("transfer-encoding")))
4519 continue;
4520
4521 if (isteq(list[hdr].n, ist("")))
4522 break; // end
4523
4524 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
4525 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004526 if (b_space_wraps(mbuf))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004527 goto realign_again;
4528 goto full;
4529 }
4530 }
4531
Christopher Faulet0b465482019-02-19 15:14:23 +01004532 /* we may need to add END_STREAM except for 1xx responses.
Willy Tarreau115e83b2018-12-01 19:17:53 +01004533 * FIXME: we should also set it when we know for sure that the
4534 * content-length is zero as well as on 204/304
4535 */
Christopher Faulet0b465482019-02-19 15:14:23 +01004536 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM &&
4537 (h2s->status >= 200 || h2s->status == 101))
Willy Tarreau115e83b2018-12-01 19:17:53 +01004538 es_now = 1;
4539
Willy Tarreau927b88b2019-03-04 08:03:25 +01004540 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW)
Willy Tarreau115e83b2018-12-01 19:17:53 +01004541 es_now = 1;
4542
4543 /* update the frame's size */
4544 h2_set_frame_size(outbuf.area, outbuf.data - 9);
4545
4546 if (es_now)
4547 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
4548
4549 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004550 b_add(mbuf, outbuf.data);
Christopher Faulet0b465482019-02-19 15:14:23 +01004551
4552 /* indicates the HEADERS frame was sent, except for 1xx responses. For
4553 * 1xx responses, another HEADERS frame is expected.
4554 */
4555 if (h2s->status >= 200 || h2s->status == 101)
4556 h2s->flags |= H2_SF_HEADERS_SENT;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004557
Willy Tarreau115e83b2018-12-01 19:17:53 +01004558 if (es_now) {
4559 h2s->flags |= H2_SF_ES_SENT;
4560 if (h2s->st == H2_SS_OPEN)
4561 h2s->st = H2_SS_HLOC;
4562 else
4563 h2s_close(h2s);
4564 }
4565
4566 /* OK we could properly deliver the response */
4567
4568 /* remove all header blocks including the EOH and compute the
4569 * corresponding size.
4570 *
4571 * FIXME: We should remove everything when es_now is set.
4572 */
4573 ret = 0;
4574 idx = htx_get_head(htx);
4575 blk = htx_get_blk(htx, idx);
4576 while (blk != blk_end) {
4577 ret += htx_get_blksz(blk);
4578 blk = htx_remove_blk(htx, blk);
4579 }
Willy Tarreauc5753ae2018-12-02 12:28:01 +01004580
Christopher Faulet316934d2019-05-15 14:22:48 +02004581 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
4582 ret += htx_get_blksz(blk_end);
Willy Tarreauc5753ae2018-12-02 12:28:01 +01004583 htx_remove_blk(htx, blk_end);
Christopher Faulet316934d2019-05-15 14:22:48 +02004584 }
Willy Tarreau115e83b2018-12-01 19:17:53 +01004585 end:
4586 return ret;
4587 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02004588 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
4589 goto retry;
Willy Tarreau115e83b2018-12-01 19:17:53 +01004590 h2c->flags |= H2_CF_MUX_MFULL;
4591 h2s->flags |= H2_SF_BLK_MROOM;
4592 ret = 0;
4593 goto end;
4594 fail:
4595 /* unparsable HTX messages, too large ones to be produced in the local
4596 * list etc go here (unrecoverable errors).
4597 */
4598 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
4599 ret = 0;
4600 goto end;
4601}
4602
Willy Tarreau80739692018-10-05 11:35:57 +02004603/* Try to send a HEADERS frame matching HTX request present in HTX message
4604 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
4605 * must check the stream's status to detect any error which might have happened
4606 * subsequently to a successful send. The htx blocks are automatically removed
4607 * from the message. The htx message is assumed to be valid since produced from
4608 * the internal code, hence it contains a start line, an optional series of
4609 * header blocks and an end of header, otherwise an invalid frame could be
4610 * emitted and the resulting htx message could be left in an inconsistent state.
4611 */
4612static size_t h2s_htx_bck_make_req_headers(struct h2s *h2s, struct htx *htx)
4613{
4614 struct http_hdr list[MAX_HTTP_HDR];
4615 struct h2c *h2c = h2s->h2c;
4616 struct htx_blk *blk;
4617 struct htx_blk *blk_end;
4618 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02004619 struct buffer *mbuf;
Willy Tarreau80739692018-10-05 11:35:57 +02004620 struct htx_sl *sl;
Willy Tarreau053c1572019-02-01 16:13:59 +01004621 struct ist meth, path, auth;
Willy Tarreau80739692018-10-05 11:35:57 +02004622 enum htx_blk_type type;
4623 int es_now = 0;
4624 int ret = 0;
4625 int hdr;
4626 int idx;
4627
4628 if (h2c_mux_busy(h2c, h2s)) {
4629 h2s->flags |= H2_SF_BLK_MBUSY;
4630 return 0;
4631 }
4632
Willy Tarreau80739692018-10-05 11:35:57 +02004633 /* determine the first block which must not be deleted, blk_end may
4634 * be NULL if all blocks have to be deleted.
4635 */
4636 idx = htx_get_head(htx);
4637 blk_end = NULL;
4638 while (idx != -1) {
4639 type = htx_get_blk_type(htx_get_blk(htx, idx));
4640 idx = htx_get_next(htx, idx);
4641 if (type == HTX_BLK_EOH) {
4642 if (idx != -1)
4643 blk_end = htx_get_blk(htx, idx);
4644 break;
4645 }
4646 }
4647
4648 /* get the start line, we do have one */
Christopher Fauletb77a1d22019-05-13 11:55:10 +02004649 blk = htx_get_head_blk(htx);
4650 BUG_ON(htx_get_blk_type(blk) != HTX_BLK_REQ_SL);
4651 ALREADY_CHECKED(blk);
4652 sl = htx_get_blk_ptr(htx, blk);
Willy Tarreau80739692018-10-05 11:35:57 +02004653 meth = htx_sl_req_meth(sl);
4654 path = htx_sl_req_uri(sl);
4655
4656 /* and the rest of the headers, that we dump starting at header 0 */
4657 hdr = 0;
4658
Willy Tarreau8e162ee2018-12-06 14:07:27 +01004659 idx = htx_get_head(htx); // returns the SL that we skip
Willy Tarreau80739692018-10-05 11:35:57 +02004660 while ((idx = htx_get_next(htx, idx)) != -1) {
4661 blk = htx_get_blk(htx, idx);
4662 type = htx_get_blk_type(blk);
4663
4664 if (type == HTX_BLK_UNUSED)
4665 continue;
4666
4667 if (type != HTX_BLK_HDR)
4668 break;
4669
4670 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1))
4671 goto fail;
4672
4673 list[hdr].n = htx_get_blk_name(htx, blk);
4674 list[hdr].v = htx_get_blk_value(htx, blk);
Willy Tarreau80739692018-10-05 11:35:57 +02004675 hdr++;
4676 }
4677
4678 /* marker for end of headers */
4679 list[hdr].n = ist("");
4680
Willy Tarreau9c218e72019-05-26 10:08:28 +02004681 mbuf = br_tail(h2c->mbuf);
4682 retry:
4683 if (!h2_get_buf(h2c, mbuf)) {
4684 h2c->flags |= H2_CF_MUX_MALLOC;
4685 h2s->flags |= H2_SF_BLK_MROOM;
4686 return 0;
4687 }
4688
Willy Tarreau80739692018-10-05 11:35:57 +02004689 chunk_reset(&outbuf);
4690
4691 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004692 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
4693 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02004694 break;
4695 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02004696 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau80739692018-10-05 11:35:57 +02004697 }
4698
4699 if (outbuf.size < 9)
4700 goto full;
4701
4702 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
4703 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
4704 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4705 outbuf.data = 9;
4706
4707 /* encode the method, which necessarily is the first one */
Willy Tarreaubdabc3a2018-12-10 18:25:11 +01004708 if (!hpack_encode_method(&outbuf, sl->info.req.meth, meth)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004709 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02004710 goto realign_again;
4711 goto full;
4712 }
4713
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004714 /* RFC7540 #8.3: the CONNECT method must have :
4715 * - :authority set to the URI part (host:port)
4716 * - :method set to CONNECT
4717 * - :scheme and :path omitted
4718 */
4719 if (sl->info.req.meth != HTTP_METH_CONNECT) {
4720 /* encode the scheme which is always "https" (or 0x86 for "http") */
4721 if (!hpack_encode_scheme(&outbuf, ist("https"))) {
4722 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004723 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004724 goto realign_again;
4725 goto full;
4726 }
Willy Tarreau80739692018-10-05 11:35:57 +02004727
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004728 /* encode the path, which necessarily is the second one */
4729 if (!hpack_encode_path(&outbuf, path)) {
4730 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004731 if (b_space_wraps(mbuf))
Willy Tarreau5be92ff2019-02-01 15:51:59 +01004732 goto realign_again;
4733 goto full;
4734 }
Willy Tarreau053c1572019-02-01 16:13:59 +01004735
4736 /* look for the Host header and place it in :authority */
4737 auth = ist2(NULL, 0);
4738 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
4739 if (isteq(list[hdr].n, ist("")))
4740 break; // end
4741
4742 if (isteq(list[hdr].n, ist("host"))) {
4743 auth = list[hdr].v;
4744 break;
4745 }
4746 }
4747 }
4748 else {
4749 /* for CONNECT, :authority is taken from the path */
4750 auth = path;
4751 }
4752
4753 if (auth.ptr && !hpack_encode_header(&outbuf, ist(":authority"), auth)) {
4754 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004755 if (b_space_wraps(mbuf))
Willy Tarreau053c1572019-02-01 16:13:59 +01004756 goto realign_again;
4757 goto full;
Willy Tarreau80739692018-10-05 11:35:57 +02004758 }
4759
4760 /* encode all headers, stop at empty name */
4761 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
4762 /* these ones do not exist in H2 and must be dropped. */
4763 if (isteq(list[hdr].n, ist("connection")) ||
Willy Tarreau053c1572019-02-01 16:13:59 +01004764 isteq(list[hdr].n, ist("host")) ||
Willy Tarreau80739692018-10-05 11:35:57 +02004765 isteq(list[hdr].n, ist("proxy-connection")) ||
4766 isteq(list[hdr].n, ist("keep-alive")) ||
4767 isteq(list[hdr].n, ist("upgrade")) ||
4768 isteq(list[hdr].n, ist("transfer-encoding")))
4769 continue;
4770
4771 if (isteq(list[hdr].n, ist("")))
4772 break; // end
4773
4774 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
4775 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004776 if (b_space_wraps(mbuf))
Willy Tarreau80739692018-10-05 11:35:57 +02004777 goto realign_again;
4778 goto full;
4779 }
4780 }
4781
4782 /* we may need to add END_STREAM if we have no body :
4783 * - request already closed, or :
4784 * - no transfer-encoding, and :
4785 * - no content-length or content-length:0
4786 * Fixme: this doesn't take into account CONNECT requests.
4787 */
4788 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM)
4789 es_now = 1;
4790
4791 if (sl->flags & HTX_SL_F_BODYLESS)
4792 es_now = 1;
4793
Willy Tarreau927b88b2019-03-04 08:03:25 +01004794 if (!h2s->cs || h2s->cs->flags & CS_FL_SHW)
Willy Tarreau80739692018-10-05 11:35:57 +02004795 es_now = 1;
4796
4797 /* update the frame's size */
4798 h2_set_frame_size(outbuf.area, outbuf.data - 9);
4799
4800 if (es_now)
4801 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
4802
4803 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004804 b_add(mbuf, outbuf.data);
Willy Tarreau80739692018-10-05 11:35:57 +02004805 h2s->flags |= H2_SF_HEADERS_SENT;
4806 h2s->st = H2_SS_OPEN;
4807
Willy Tarreau80739692018-10-05 11:35:57 +02004808 if (es_now) {
4809 // trim any possibly pending data (eg: inconsistent content-length)
4810 h2s->flags |= H2_SF_ES_SENT;
4811 h2s->st = H2_SS_HLOC;
4812 }
4813
4814 /* remove all header blocks including the EOH and compute the
4815 * corresponding size.
4816 *
4817 * FIXME: We should remove everything when es_now is set.
4818 */
4819 ret = 0;
4820 idx = htx_get_head(htx);
4821 blk = htx_get_blk(htx, idx);
4822 while (blk != blk_end) {
4823 ret += htx_get_blksz(blk);
4824 blk = htx_remove_blk(htx, blk);
4825 }
4826
Christopher Faulet316934d2019-05-15 14:22:48 +02004827 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
4828 ret += htx_get_blksz(blk_end);
Willy Tarreau80739692018-10-05 11:35:57 +02004829 htx_remove_blk(htx, blk_end);
Christopher Faulet316934d2019-05-15 14:22:48 +02004830 }
Willy Tarreau80739692018-10-05 11:35:57 +02004831
4832 end:
4833 return ret;
4834 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02004835 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
4836 goto retry;
Willy Tarreau80739692018-10-05 11:35:57 +02004837 h2c->flags |= H2_CF_MUX_MFULL;
4838 h2s->flags |= H2_SF_BLK_MROOM;
4839 ret = 0;
4840 goto end;
4841 fail:
4842 /* unparsable HTX messages, too large ones to be produced in the local
4843 * list etc go here (unrecoverable errors).
4844 */
4845 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
4846 ret = 0;
4847 goto end;
4848}
4849
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004850/* Try to send a DATA frame matching HTTP response present in HTX structure
Willy Tarreau98de12a2018-12-12 07:03:00 +01004851 * present in <buf>, for stream <h2s>. Returns the number of bytes sent. The
4852 * caller must check the stream's status to detect any error which might have
4853 * happened subsequently to a successful send. Returns the number of data bytes
Christopher Faulet54b5e212019-06-04 10:08:28 +02004854 * consumed, or zero if nothing done. Note that EOM count for 1 byte.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004855 */
Willy Tarreau98de12a2018-12-12 07:03:00 +01004856static size_t h2s_htx_frt_make_resp_data(struct h2s *h2s, struct buffer *buf, size_t count)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004857{
4858 struct h2c *h2c = h2s->h2c;
Willy Tarreau98de12a2018-12-12 07:03:00 +01004859 struct htx *htx;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004860 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02004861 struct buffer *mbuf;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004862 size_t total = 0;
4863 int es_now = 0;
4864 int bsize; /* htx block size */
4865 int fsize; /* h2 frame size */
4866 struct htx_blk *blk;
4867 enum htx_blk_type type;
4868 int idx;
4869
4870 if (h2c_mux_busy(h2c, h2s)) {
4871 h2s->flags |= H2_SF_BLK_MBUSY;
4872 goto end;
4873 }
4874
Willy Tarreau98de12a2018-12-12 07:03:00 +01004875 htx = htx_from_buf(buf);
4876
Christopher Faulet54b5e212019-06-04 10:08:28 +02004877 /* We only come here with HTX_BLK_DATA blocks. However, while looping,
4878 * we can meet an HTX_BLK_EOM block that we'll leave to the caller to
4879 * handle.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004880 */
4881
4882 new_frame:
Willy Tarreauee573762018-12-04 15:25:57 +01004883 if (!count || htx_is_empty(htx))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004884 goto end;
4885
4886 idx = htx_get_head(htx);
4887 blk = htx_get_blk(htx, idx);
Christopher Faulet54b5e212019-06-04 10:08:28 +02004888 type = htx_get_blk_type(blk); // DATA or EOM
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004889 bsize = htx_get_blksz(blk);
4890 fsize = bsize;
4891
Christopher Faulet54b5e212019-06-04 10:08:28 +02004892 if (type == HTX_BLK_EOM) {
Willy Tarreau7eeb10a2019-01-04 09:28:17 +01004893 if (h2s->flags & H2_SF_ES_SENT) {
4894 /* ES already sent */
4895 htx_remove_blk(htx, blk);
4896 total++; // EOM counts as one byte
4897 count--;
4898 goto end;
4899 }
4900 }
4901 else if (type != HTX_BLK_DATA)
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01004902 goto end;
Willy Tarreau98de12a2018-12-12 07:03:00 +01004903
Willy Tarreau9c218e72019-05-26 10:08:28 +02004904 mbuf = br_tail(h2c->mbuf);
4905 retry:
4906 if (!h2_get_buf(h2c, mbuf)) {
4907 h2c->flags |= H2_CF_MUX_MALLOC;
4908 h2s->flags |= H2_SF_BLK_MROOM;
4909 goto end;
4910 }
4911
Willy Tarreau98de12a2018-12-12 07:03:00 +01004912 /* Perform some optimizations to reduce the number of buffer copies.
4913 * First, if the mux's buffer is empty and the htx area contains
4914 * exactly one data block of the same size as the requested count, and
4915 * this count fits within the frame size, the stream's window size, and
4916 * the connection's window size, then it's possible to simply swap the
4917 * caller's buffer with the mux's output buffer and adjust offsets and
4918 * length to match the entire DATA HTX block in the middle. In this
4919 * case we perform a true zero-copy operation from end-to-end. This is
4920 * the situation that happens all the time with large files. Second, if
4921 * this is not possible, but the mux's output buffer is empty, we still
4922 * have an opportunity to avoid the copy to the intermediary buffer, by
4923 * making the intermediary buffer's area point to the output buffer's
4924 * area. In this case we want to skip the HTX header to make sure that
4925 * copies remain aligned and that this operation remains possible all
4926 * the time. This goes for headers, data blocks and any data extracted
4927 * from the HTX blocks.
4928 */
4929 if (unlikely(fsize == count &&
4930 htx->used == 1 && type == HTX_BLK_DATA &&
4931 fsize <= h2s->mws && fsize <= h2c->mws && fsize <= h2c->mfs)) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004932 void *old_area = mbuf->area;
Willy Tarreau98de12a2018-12-12 07:03:00 +01004933
Willy Tarreaubcc45952019-05-26 10:05:50 +02004934 if (b_data(mbuf)) {
Willy Tarreau8ab128c2019-03-21 17:47:28 +01004935 /* Too bad there are data left there. We're willing to memcpy/memmove
4936 * up to 1/4 of the buffer, which means that it's OK to copy a large
4937 * frame into a buffer containing few data if it needs to be realigned,
4938 * and that it's also OK to copy few data without realigning. Otherwise
4939 * we'll pretend the mbuf is full and wait for it to become empty.
Willy Tarreau98de12a2018-12-12 07:03:00 +01004940 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004941 if (fsize + 9 <= b_room(mbuf) &&
4942 (b_data(mbuf) <= b_size(mbuf) / 4 ||
4943 (fsize <= b_size(mbuf) / 4 && fsize + 9 <= b_contig_space(mbuf))))
Willy Tarreau98de12a2018-12-12 07:03:00 +01004944 goto copy;
Willy Tarreau8ab128c2019-03-21 17:47:28 +01004945
Willy Tarreau9c218e72019-05-26 10:08:28 +02004946 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
4947 goto retry;
4948
Willy Tarreau98de12a2018-12-12 07:03:00 +01004949 h2c->flags |= H2_CF_MUX_MFULL;
4950 h2s->flags |= H2_SF_BLK_MROOM;
4951 goto end;
4952 }
4953
4954 /* map an H2 frame to the HTX block so that we can put the
4955 * frame header there.
4956 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02004957 *mbuf = b_make(buf->area, buf->size, sizeof(struct htx) + blk->addr - 9, fsize + 9);
4958 outbuf.area = b_head(mbuf);
Willy Tarreau98de12a2018-12-12 07:03:00 +01004959
4960 /* prepend an H2 DATA frame header just before the DATA block */
4961 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
4962 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4963 h2_set_frame_size(outbuf.area, fsize);
4964
4965 /* update windows */
4966 h2s->mws -= fsize;
4967 h2c->mws -= fsize;
4968
4969 /* and exchange with our old area */
4970 buf->area = old_area;
4971 buf->data = buf->head = 0;
4972 total += fsize;
4973 goto end;
4974 }
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01004975
Willy Tarreau98de12a2018-12-12 07:03:00 +01004976 copy:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004977 /* for DATA and EOM we'll have to emit a frame, even if empty */
4978
4979 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02004980 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
4981 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004982 break;
4983 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02004984 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004985 }
4986
4987 if (outbuf.size < 9) {
Willy Tarreau9c218e72019-05-26 10:08:28 +02004988 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
4989 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004990 h2c->flags |= H2_CF_MUX_MFULL;
4991 h2s->flags |= H2_SF_BLK_MROOM;
4992 goto end;
4993 }
4994
4995 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
4996 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
4997 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4998 outbuf.data = 9;
4999
5000 /* we have in <fsize> the exact number of bytes we need to copy from
5001 * the HTX buffer. We need to check this against the connection's and
5002 * the stream's send windows, and to ensure that this fits in the max
5003 * frame size and in the buffer's available space minus 9 bytes (for
5004 * the frame header). The connection's flow control is applied last so
5005 * that we can use a separate list of streams which are immediately
5006 * unblocked on window opening. Note: we don't implement padding.
5007 */
5008
5009 /* EOM is presented with bsize==1 but would lead to the emission of an
5010 * empty frame, thus we force it to zero here.
5011 */
5012 if (type == HTX_BLK_EOM)
5013 bsize = fsize = 0;
5014
5015 if (!fsize)
5016 goto send_empty;
5017
5018 if (h2s->mws <= 0) {
5019 h2s->flags |= H2_SF_BLK_SFCTL;
Willy Tarreauc234ae32019-05-13 17:56:11 +02005020 if (LIST_ADDED(&h2s->list))
Olivier Houchardbfe2a832019-05-10 14:02:21 +02005021 LIST_DEL_INIT(&h2s->list);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005022 goto end;
5023 }
5024
Willy Tarreauee573762018-12-04 15:25:57 +01005025 if (fsize > count)
5026 fsize = count;
5027
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005028 if (fsize > h2s->mws)
5029 fsize = h2s->mws; // >0
5030
5031 if (h2c->mfs && fsize > h2c->mfs)
5032 fsize = h2c->mfs; // >0
5033
5034 if (fsize + 9 > outbuf.size) {
Willy Tarreau455d5682019-05-24 19:42:18 +02005035 /* It doesn't fit at once. If it at least fits once split and
5036 * the amount of data to move is low, let's defragment the
5037 * buffer now.
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005038 */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005039 if (b_space_wraps(mbuf) &&
5040 (fsize + 9 <= b_room(mbuf)) &&
5041 b_data(mbuf) <= MAX_DATA_REALIGN)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005042 goto realign_again;
5043 fsize = outbuf.size - 9;
5044
5045 if (fsize <= 0) {
5046 /* no need to send an empty frame here */
Willy Tarreau9c218e72019-05-26 10:08:28 +02005047 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5048 goto retry;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005049 h2c->flags |= H2_CF_MUX_MFULL;
5050 h2s->flags |= H2_SF_BLK_MROOM;
5051 goto end;
5052 }
5053 }
5054
5055 if (h2c->mws <= 0) {
5056 h2s->flags |= H2_SF_BLK_MFCTL;
5057 goto end;
5058 }
5059
5060 if (fsize > h2c->mws)
5061 fsize = h2c->mws;
5062
5063 /* now let's copy this this into the output buffer */
5064 memcpy(outbuf.area + 9, htx_get_blk_ptr(htx, blk), fsize);
Willy Tarreau0f799ca2018-12-04 15:20:11 +01005065 h2s->mws -= fsize;
5066 h2c->mws -= fsize;
Willy Tarreauee573762018-12-04 15:25:57 +01005067 count -= fsize;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005068
5069 send_empty:
5070 /* update the frame's size */
5071 h2_set_frame_size(outbuf.area, fsize);
5072
5073 /* FIXME: for now we only set the ES flag on empty DATA frames, once
5074 * meeting EOM. We should optimize this later.
5075 */
5076 if (type == HTX_BLK_EOM) {
Willy Tarreauee573762018-12-04 15:25:57 +01005077 total++; // EOM counts as one byte
5078 count--;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005079 es_now = 1;
5080 }
5081
5082 if (es_now)
5083 outbuf.area[4] |= H2_F_DATA_END_STREAM;
5084
5085 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005086 b_add(mbuf, fsize + 9);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005087
5088 /* consume incoming HTX block, including EOM */
5089 total += fsize;
5090 if (fsize == bsize) {
5091 htx_remove_blk(htx, blk);
5092 if (fsize)
5093 goto new_frame;
5094 } else {
5095 /* we've truncated this block */
5096 htx_cut_data_blk(htx, blk, fsize);
5097 }
5098
5099 if (es_now) {
5100 if (h2s->st == H2_SS_OPEN)
5101 h2s->st = H2_SS_HLOC;
5102 else
5103 h2s_close(h2s);
5104
5105 h2s->flags |= H2_SF_ES_SENT;
5106 }
5107
5108 end:
5109 return total;
5110}
5111
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005112/* Try to send a HEADERS frame matching HTX_BLK_TLR series of blocks present in
5113 * HTX message <htx> for the H2 stream <h2s>. Returns the number of bytes
5114 * processed. The caller must check the stream's status to detect any error
5115 * which might have happened subsequently to a successful send. The htx blocks
5116 * are automatically removed from the message. The htx message is assumed to be
5117 * valid since produced from the internal code. Processing stops when meeting
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005118 * the EOM, which is *not* removed. All trailers are processed at once and sent
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005119 * as a single frame. The ES flag is always set.
5120 */
5121static size_t h2s_htx_make_trailers(struct h2s *h2s, struct htx *htx)
5122{
5123 struct http_hdr list[MAX_HTTP_HDR];
5124 struct h2c *h2c = h2s->h2c;
5125 struct htx_blk *blk;
5126 struct htx_blk *blk_end;
5127 struct buffer outbuf;
Willy Tarreaubcc45952019-05-26 10:05:50 +02005128 struct buffer *mbuf;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005129 enum htx_blk_type type;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005130 int ret = 0;
5131 int hdr;
5132 int idx;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005133
5134 if (h2c_mux_busy(h2c, h2s)) {
5135 h2s->flags |= H2_SF_BLK_MBUSY;
5136 goto end;
5137 }
5138
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005139 /* determine the first block which must not be deleted, blk_end may
5140 * be NULL if all blocks have to be deleted. also get trailers.
5141 */
5142 idx = htx_get_head(htx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005143 blk_end = NULL;
5144
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005145 hdr = 0;
5146 while (idx != -1) {
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005147 blk = htx_get_blk(htx, idx);
5148 type = htx_get_blk_type(blk);
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005149 idx = htx_get_next(htx, idx);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005150 if (type == HTX_BLK_UNUSED)
5151 continue;
5152
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005153 if (type == HTX_BLK_EOT) {
5154 if (idx != -1)
5155 blk_end = blk;
5156 break;
5157 }
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005158 if (type != HTX_BLK_TLR)
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005159 break;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005160
5161 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1))
5162 goto fail;
5163
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005164 list[hdr].n = htx_get_blk_name(htx, blk);
5165 list[hdr].v = htx_get_blk_value(htx, blk);
5166 hdr++;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005167 }
5168
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005169 /* marker for end of trailers */
5170 list[hdr].n = ist("");
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005171
Willy Tarreau9c218e72019-05-26 10:08:28 +02005172 mbuf = br_tail(h2c->mbuf);
5173 retry:
5174 if (!h2_get_buf(h2c, mbuf)) {
5175 h2c->flags |= H2_CF_MUX_MALLOC;
5176 h2s->flags |= H2_SF_BLK_MROOM;
5177 goto end;
5178 }
5179
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005180 chunk_reset(&outbuf);
5181
5182 while (1) {
Willy Tarreaubcc45952019-05-26 10:05:50 +02005183 outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
5184 if (outbuf.size >= 9 || !b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005185 break;
5186 realign_again:
Willy Tarreaubcc45952019-05-26 10:05:50 +02005187 b_slow_realign(mbuf, trash.area, b_data(mbuf));
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005188 }
5189
5190 if (outbuf.size < 9)
5191 goto full;
5192
5193 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4,ES=1 */
5194 memcpy(outbuf.area, "\x00\x00\x00\x01\x05", 5);
5195 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
5196 outbuf.data = 9;
5197
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005198 /* encode all headers */
5199 for (idx = 0; idx < hdr; idx++) {
5200 /* these ones do not exist in H2 or must not appear in
5201 * trailers and must be dropped.
5202 */
5203 if (isteq(list[idx].n, ist("host")) ||
5204 isteq(list[idx].n, ist("content-length")) ||
5205 isteq(list[idx].n, ist("connection")) ||
5206 isteq(list[idx].n, ist("proxy-connection")) ||
5207 isteq(list[idx].n, ist("keep-alive")) ||
5208 isteq(list[idx].n, ist("upgrade")) ||
5209 isteq(list[idx].n, ist("te")) ||
5210 isteq(list[idx].n, ist("transfer-encoding")))
5211 continue;
5212
5213 if (!hpack_encode_header(&outbuf, list[idx].n, list[idx].v)) {
5214 /* output full */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005215 if (b_space_wraps(mbuf))
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005216 goto realign_again;
5217 goto full;
5218 }
5219 }
5220
Willy Tarreau5121e5d2019-05-06 15:13:41 +02005221 if (outbuf.data == 9) {
5222 /* here we have a problem, we have nothing to emit (either we
5223 * received an empty trailers block followed or we removed its
5224 * contents above). Because of this we can't send a HEADERS
5225 * frame, so we have to cheat and instead send an empty DATA
5226 * frame conveying the ES flag.
Willy Tarreau67b8cae2019-02-21 18:16:35 +01005227 */
5228 outbuf.area[3] = H2_FT_DATA;
5229 outbuf.area[4] = H2_F_DATA_END_STREAM;
5230 }
5231
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005232 /* update the frame's size */
5233 h2_set_frame_size(outbuf.area, outbuf.data - 9);
5234
5235 /* commit the H2 response */
Willy Tarreaubcc45952019-05-26 10:05:50 +02005236 b_add(mbuf, outbuf.data);
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005237 h2s->flags |= H2_SF_ES_SENT;
5238
5239 if (h2s->st == H2_SS_OPEN)
5240 h2s->st = H2_SS_HLOC;
5241 else
5242 h2s_close(h2s);
5243
5244 /* OK we could properly deliver the response */
5245 done:
Willy Tarreaufb07b3f2019-05-06 11:23:29 +02005246 /* remove all header blocks till the end and compute the corresponding size. */
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005247 ret = 0;
5248 idx = htx_get_head(htx);
5249 blk = htx_get_blk(htx, idx);
5250 while (blk != blk_end) {
5251 ret += htx_get_blksz(blk);
5252 blk = htx_remove_blk(htx, blk);
5253 }
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005254
5255 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM) {
5256 ret += htx_get_blksz(blk_end);
5257 htx_remove_blk(htx, blk_end);
5258 }
5259
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005260 end:
5261 return ret;
5262 full:
Willy Tarreau9c218e72019-05-26 10:08:28 +02005263 if ((mbuf = br_tail_add(h2c->mbuf)) != NULL)
5264 goto retry;
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005265 h2c->flags |= H2_CF_MUX_MFULL;
5266 h2s->flags |= H2_SF_BLK_MROOM;
5267 ret = 0;
5268 goto end;
5269 fail:
5270 /* unparsable HTX messages, too large ones to be produced in the local
5271 * list etc go here (unrecoverable errors).
5272 */
5273 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5274 ret = 0;
5275 goto end;
5276}
5277
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005278/* Called from the upper layer, to subscribe to events, such as being able to send.
5279 * The <param> argument here is supposed to be a pointer to a wait_event struct
5280 * which will be passed to h2s->recv_wait or h2s->send_wait depending on the
5281 * event_type. The event_type must only be a combination of SUB_RETRY_RECV and
5282 * SUB_RETRY_SEND, other values will lead to -1 being returned. It always
5283 * returns 0 except for the error above.
5284 */
Olivier Houchard6ff20392018-07-17 18:46:31 +02005285static int h2_subscribe(struct conn_stream *cs, int event_type, void *param)
5286{
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005287 struct wait_event *sw;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005288 struct h2s *h2s = cs->ctx;
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02005289 struct h2c *h2c = h2s->h2c;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005290
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005291 if (event_type & SUB_RETRY_RECV) {
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02005292 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005293 BUG_ON(h2s->recv_wait != NULL || (sw->events & SUB_RETRY_RECV));
5294 sw->events |= SUB_RETRY_RECV;
5295 h2s->recv_wait = sw;
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005296 event_type &= ~SUB_RETRY_RECV;
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005297 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005298 if (event_type & SUB_RETRY_SEND) {
Olivier Houchard6ff20392018-07-17 18:46:31 +02005299 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005300 BUG_ON(h2s->send_wait != NULL || (sw->events & SUB_RETRY_SEND));
5301 sw->events |= SUB_RETRY_SEND;
5302 h2s->send_wait = sw;
5303 if (!(h2s->flags & H2_SF_BLK_SFCTL) &&
5304 !LIST_ADDED(&h2s->list)) {
5305 if (h2s->flags & H2_SF_BLK_MFCTL)
5306 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
5307 else
5308 LIST_ADDQ(&h2c->send_list, &h2s->list);
Olivier Houcharde1c6dbc2018-08-01 17:06:43 +02005309 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005310 event_type &= ~SUB_RETRY_SEND;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005311 }
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005312 if (event_type != 0)
5313 return -1;
5314 return 0;
Olivier Houchard6ff20392018-07-17 18:46:31 +02005315}
5316
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005317/* Called from the upper layer, to unsubscribe some events (undo h2_subscribe).
5318 * The <param> argument here is supposed to be a pointer to the same wait_event
5319 * struct that was passed to h2_subscribe() otherwise nothing will be changed.
5320 * It always returns zero.
5321 */
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005322static int h2_unsubscribe(struct conn_stream *cs, int event_type, void *param)
5323{
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005324 struct wait_event *sw;
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005325 struct h2s *h2s = cs->ctx;
5326
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005327 if (event_type & SUB_RETRY_RECV) {
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005328 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005329 BUG_ON(h2s->recv_wait != sw);
5330 sw->events &= ~SUB_RETRY_RECV;
5331 h2s->recv_wait = NULL;
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005332 }
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005333 if (event_type & SUB_RETRY_SEND) {
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005334 sw = param;
Olivier Houchardf8338152019-05-14 17:50:32 +02005335 BUG_ON(h2s->send_wait != sw);
5336 LIST_DEL(&h2s->list);
5337 LIST_INIT(&h2s->list);
5338 sw->events &= ~SUB_RETRY_SEND;
5339 /* We were about to send, make sure it does not happen */
5340 if (LIST_ADDED(&h2s->sending_list) &&
5341 h2s->send_wait != &h2s->wait_event) {
5342 task_remove_from_tasklet_list((struct task *)h2s->send_wait->task);
5343 LIST_DEL_INIT(&h2s->sending_list);
Olivier Houchardd846c262018-10-19 17:24:29 +02005344 }
Olivier Houchardf8338152019-05-14 17:50:32 +02005345 h2s->send_wait = NULL;
Olivier Houchardd846c262018-10-19 17:24:29 +02005346 }
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005347 return 0;
5348}
5349
5350
Olivier Houchard511efea2018-08-16 15:30:32 +02005351/* Called from the upper layer, to receive data */
5352static size_t h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
5353{
Olivier Houchard638b7992018-08-16 15:41:52 +02005354 struct h2s *h2s = cs->ctx;
Willy Tarreau082f5592018-11-25 08:03:32 +01005355 struct h2c *h2c = h2s->h2c;
Willy Tarreau86724e22018-12-01 23:19:43 +01005356 struct htx *h2s_htx = NULL;
5357 struct htx *buf_htx = NULL;
Olivier Houchard511efea2018-08-16 15:30:32 +02005358 size_t ret = 0;
5359
5360 /* transfer possibly pending data to the upper layer */
Willy Tarreau86724e22018-12-01 23:19:43 +01005361 if (h2c->proxy->options2 & PR_O2_USE_HTX) {
Willy Tarreau86724e22018-12-01 23:19:43 +01005362 h2s_htx = htx_from_buf(&h2s->rxbuf);
Olivier Houchard56b03482018-12-10 16:09:53 +01005363 if (htx_is_empty(h2s_htx)) {
Christopher Faulet37070b22019-02-14 15:12:14 +01005364 /* Here htx_to_buf() will set buffer data to 0 because
5365 * the HTX is empty.
5366 */
5367 htx_to_buf(h2s_htx, &h2s->rxbuf);
Willy Tarreau86724e22018-12-01 23:19:43 +01005368 goto end;
Olivier Houchard56b03482018-12-10 16:09:53 +01005369 }
Willy Tarreau86724e22018-12-01 23:19:43 +01005370
Christopher Faulet156852b2019-05-16 11:29:13 +02005371 ret = h2s_htx->data;
Willy Tarreau86724e22018-12-01 23:19:43 +01005372 buf_htx = htx_from_buf(buf);
Willy Tarreau86724e22018-12-01 23:19:43 +01005373
Christopher Faulet2f6edc82019-05-15 10:07:59 +02005374 /* <buf> is empty and the message is small enough, swap the
5375 * buffers. */
5376 if (htx_is_empty(buf_htx) && htx_used_space(h2s_htx) <= count) {
5377 htx_to_buf(buf_htx, buf);
5378 htx_to_buf(h2s_htx, &h2s->rxbuf);
5379 b_xfer(buf, &h2s->rxbuf, b_data(&h2s->rxbuf));
5380 goto end;
5381 }
5382
Christopher Faulet156852b2019-05-16 11:29:13 +02005383 htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_EOM);
Willy Tarreau7196dd62019-03-05 10:51:11 +01005384
Christopher Fauleta61e97b2019-05-16 11:30:31 +02005385 if (h2s_htx->flags & HTX_FL_PARSING_ERROR) {
Willy Tarreau7196dd62019-03-05 10:51:11 +01005386 buf_htx->flags |= HTX_FL_PARSING_ERROR;
Christopher Fauleta61e97b2019-05-16 11:30:31 +02005387 if (htx_is_empty(buf_htx))
5388 cs->flags |= CS_FL_EOI;
5389 }
Willy Tarreau7196dd62019-03-05 10:51:11 +01005390
Christopher Fauleteaf0d2a2019-02-18 16:04:35 +01005391 buf_htx->extra = (h2s_htx->extra ? (h2s_htx->data + h2s_htx->extra) : 0);
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005392 htx_to_buf(buf_htx, buf);
5393 htx_to_buf(h2s_htx, &h2s->rxbuf);
Christopher Faulet156852b2019-05-16 11:29:13 +02005394 ret -= h2s_htx->data;
Willy Tarreau86724e22018-12-01 23:19:43 +01005395 }
5396 else {
5397 ret = b_xfer(buf, &h2s->rxbuf, count);
5398 }
Olivier Houchard511efea2018-08-16 15:30:32 +02005399
Christopher Faulet37070b22019-02-14 15:12:14 +01005400 end:
Olivier Houchard638b7992018-08-16 15:41:52 +02005401 if (b_data(&h2s->rxbuf))
Olivier Houchardd247be02018-12-06 16:22:29 +01005402 cs->flags |= (CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02005403 else {
Olivier Houchardd247be02018-12-06 16:22:29 +01005404 cs->flags &= ~(CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Christopher Fauletfa922f02019-05-07 10:55:17 +02005405 if (h2s->flags & H2_SF_ES_RCVD)
5406 cs->flags |= CS_FL_EOI;
Willy Tarreau99ad1b32019-05-14 11:46:28 +02005407 if (H2_SS_MASK(h2s->st) & H2_SS_EOS_BITS)
Olivier Houchard511efea2018-08-16 15:30:32 +02005408 cs->flags |= CS_FL_EOS;
Olivier Houchard71748cb2018-12-17 14:16:46 +01005409 if (cs->flags & CS_FL_ERR_PENDING)
5410 cs->flags |= CS_FL_ERROR;
Olivier Houchard638b7992018-08-16 15:41:52 +02005411 if (b_size(&h2s->rxbuf)) {
5412 b_free(&h2s->rxbuf);
5413 offer_buffers(NULL, tasks_run_queue);
5414 }
Olivier Houchard511efea2018-08-16 15:30:32 +02005415 }
5416
Willy Tarreau082f5592018-11-25 08:03:32 +01005417 if (ret && h2c->dsi == h2s->id) {
5418 /* demux is blocking on this stream's buffer */
5419 h2c->flags &= ~H2_CF_DEM_SFULL;
Olivier Houchard3ca18bf2019-04-05 15:34:34 +02005420 h2c_restart_reading(h2c, 1);
Willy Tarreau082f5592018-11-25 08:03:32 +01005421 }
Christopher Faulet37070b22019-02-14 15:12:14 +01005422
Olivier Houchard511efea2018-08-16 15:30:32 +02005423 return ret;
5424}
5425
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005426/* stops all senders of this connection for example when the mux buffer is full.
5427 * They are moved from the sending_list to either fctl_list or send_list.
5428 */
Olivier Houchardd846c262018-10-19 17:24:29 +02005429static void h2_stop_senders(struct h2c *h2c)
5430{
5431 struct h2s *h2s, *h2s_back;
5432
Olivier Houchardd360ac62019-03-22 17:37:16 +01005433 list_for_each_entry_safe(h2s, h2s_back, &h2c->sending_list, sending_list) {
5434 LIST_DEL_INIT(&h2s->sending_list);
Willy Tarreaue73256f2019-03-25 18:02:54 +01005435 task_remove_from_tasklet_list((struct task *)h2s->send_wait->task);
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005436 h2s->send_wait->events |= SUB_RETRY_SEND;
Olivier Houchardd846c262018-10-19 17:24:29 +02005437 }
5438}
5439
Willy Tarreau749f5ca2019-03-21 19:19:36 +01005440/* Called from the upper layer, to send data from buffer <buf> for no more than
5441 * <count> bytes. Returns the number of bytes effectively sent. Some status
5442 * flags may be updated on the conn_stream.
5443 */
Christopher Fauletd44a9b32018-07-27 11:59:41 +02005444static size_t h2_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
Willy Tarreau62f52692017-10-08 23:01:42 +02005445{
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005446 struct h2s *h2s = cs->ctx;
Olivier Houchard8122a8d2018-12-03 19:13:29 +01005447 size_t orig_count = count;
Willy Tarreau1dc41e72018-06-14 13:21:28 +02005448 size_t total = 0;
Willy Tarreau5dd17352018-06-14 13:33:30 +02005449 size_t ret;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005450 struct htx *htx;
5451 struct htx_blk *blk;
5452 enum htx_blk_type btype;
5453 uint32_t bsize;
5454 int32_t idx;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005455
Olivier Houchardd360ac62019-03-22 17:37:16 +01005456 /* If we were not just woken because we wanted to send but couldn't,
5457 * and there's somebody else that is waiting to send, do nothing,
5458 * we will subscribe later and be put at the end of the list
5459 */
Willy Tarreauc234ae32019-05-13 17:56:11 +02005460 if (!LIST_ADDED(&h2s->sending_list) &&
Olivier Houchardd360ac62019-03-22 17:37:16 +01005461 (!LIST_ISEMPTY(&h2s->h2c->send_list) || !LIST_ISEMPTY(&h2s->h2c->fctl_list)))
5462 return 0;
Olivier Houchard998410a2019-04-15 19:23:37 +02005463 LIST_DEL_INIT(&h2s->sending_list);
Olivier Houchardd360ac62019-03-22 17:37:16 +01005464
Olivier Houchard998410a2019-04-15 19:23:37 +02005465 /* We couldn't set it to NULL before, because we needed it in case
5466 * we had to cancel the tasklet
5467 */
5468 h2s->send_wait = NULL;
5469
Willy Tarreau6bf641a2018-10-08 09:43:03 +02005470 if (h2s->h2c->st0 < H2_CS_FRAME_H)
5471 return 0;
5472
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005473 /* htx will be enough to decide if we're using HTX or legacy */
5474 htx = (h2s->h2c->proxy->options2 & PR_O2_USE_HTX) ? htx_from_buf(buf) : NULL;
5475
Willy Tarreau0bad0432018-06-14 16:54:01 +02005476 if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count)
Willy Tarreauc4312d32017-11-07 12:01:53 +01005477 h2s->flags |= H2_SF_OUTGOING_DATA;
5478
Willy Tarreau751f2d02018-10-05 09:35:00 +02005479 if (h2s->id == 0) {
5480 int32_t id = h2c_get_next_sid(h2s->h2c);
5481
5482 if (id < 0) {
Willy Tarreau751f2d02018-10-05 09:35:00 +02005483 cs->flags |= CS_FL_ERROR;
Willy Tarreau751f2d02018-10-05 09:35:00 +02005484 return 0;
5485 }
5486
5487 eb32_delete(&h2s->by_id);
5488 h2s->by_id.key = h2s->id = id;
5489 h2s->h2c->max_id = id;
Willy Tarreaud64a3eb2019-01-23 10:22:21 +01005490 h2s->h2c->nb_reserved--;
Willy Tarreau751f2d02018-10-05 09:35:00 +02005491 eb32_insert(&h2s->h2c->streams_by_id, &h2s->by_id);
5492 }
5493
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005494 if (htx) {
Willy Tarreau2b778482019-05-06 15:00:22 +02005495 while (h2s->st < H2_SS_HLOC && !(h2s->flags & H2_SF_BLK_ANY) &&
Willy Tarreauc14999b2018-12-06 14:09:09 +01005496 count && !htx_is_empty(htx)) {
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005497 idx = htx_get_head(htx);
5498 blk = htx_get_blk(htx, idx);
5499 btype = htx_get_blk_type(blk);
5500 bsize = htx_get_blksz(blk);
5501
5502 switch (btype) {
Willy Tarreau80739692018-10-05 11:35:57 +02005503 case HTX_BLK_REQ_SL:
5504 /* start-line before headers */
5505 ret = h2s_htx_bck_make_req_headers(h2s, htx);
5506 if (ret > 0) {
5507 total += ret;
5508 count -= ret;
5509 if (ret < bsize)
5510 goto done;
5511 }
5512 break;
5513
Willy Tarreau115e83b2018-12-01 19:17:53 +01005514 case HTX_BLK_RES_SL:
5515 /* start-line before headers */
5516 ret = h2s_htx_frt_make_resp_headers(h2s, htx);
5517 if (ret > 0) {
5518 total += ret;
5519 count -= ret;
5520 if (ret < bsize)
5521 goto done;
5522 }
5523 break;
5524
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005525 case HTX_BLK_DATA:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005526 case HTX_BLK_EOM:
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005527 /* all these cause the emission of a DATA frame (possibly empty).
5528 * This EOM necessarily is one before trailers, as the EOM following
5529 * trailers would have been consumed by the trailers parser.
5530 */
Willy Tarreau98de12a2018-12-12 07:03:00 +01005531 ret = h2s_htx_frt_make_resp_data(h2s, buf, count);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005532 if (ret > 0) {
Willy Tarreau98de12a2018-12-12 07:03:00 +01005533 htx = htx_from_buf(buf);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01005534 total += ret;
5535 count -= ret;
5536 if (ret < bsize)
5537 goto done;
5538 }
5539 break;
5540
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005541 case HTX_BLK_TLR:
Christopher Faulet2d7c5392019-06-03 10:41:26 +02005542 case HTX_BLK_EOT:
Willy Tarreau1bb812f2019-01-04 10:56:26 +01005543 /* This is the first trailers block, all the subsequent ones AND
5544 * the EOM will be swallowed by the parser.
5545 */
5546 ret = h2s_htx_make_trailers(h2s, htx);
5547 if (ret > 0) {
5548 total += ret;
5549 count -= ret;
5550 if (ret < bsize)
5551 goto done;
5552 }
5553 break;
5554
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005555 default:
5556 htx_remove_blk(htx, blk);
5557 total += bsize;
5558 count -= bsize;
5559 break;
5560 }
5561 }
5562 goto done;
5563 }
5564
5565 /* legacy transfer mode */
Willy Tarreaua40704a2018-09-11 13:52:04 +02005566 while (h2s->h1m.state < H1_MSG_DONE && count) {
Willy Tarreau001823c2018-09-12 17:25:32 +02005567 if (h2s->h1m.state <= H1_MSG_LAST_LF) {
Willy Tarreau80739692018-10-05 11:35:57 +02005568 if (h2s->h2c->flags & H2_CF_IS_BACK)
5569 ret = -1;
5570 else
5571 ret = h2s_frt_make_resp_headers(h2s, buf, total, count);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005572 }
Willy Tarreaua40704a2018-09-11 13:52:04 +02005573 else if (h2s->h1m.state < H1_MSG_TRAILERS) {
Willy Tarreau0bad0432018-06-14 16:54:01 +02005574 ret = h2s_frt_make_resp_data(h2s, buf, total, count);
Willy Tarreau9d89ac82017-10-31 17:15:59 +01005575 }
Willy Tarreaua40704a2018-09-11 13:52:04 +02005576 else if (h2s->h1m.state == H1_MSG_TRAILERS) {
Willy Tarreau9d89ac82017-10-31 17:15:59 +01005577 /* consume the trailers if any (we don't forward them for now) */
Willy Tarreau0bad0432018-06-14 16:54:01 +02005578 ret = h1_measure_trailers(buf, total, count);
Willy Tarreau9d89ac82017-10-31 17:15:59 +01005579
Willy Tarreau5dd17352018-06-14 13:33:30 +02005580 if (unlikely((int)ret <= 0)) {
5581 if ((int)ret < 0)
Willy Tarreau9d89ac82017-10-31 17:15:59 +01005582 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
5583 break;
5584 }
Willy Tarreau35a62702018-02-27 15:37:25 +01005585 // trim any possibly pending data (eg: extra CR-LF, ...)
Willy Tarreau0bad0432018-06-14 16:54:01 +02005586 total += count;
5587 count = 0;
Willy Tarreaua40704a2018-09-11 13:52:04 +02005588 h2s->h1m.state = H1_MSG_DONE;
Willy Tarreau9d89ac82017-10-31 17:15:59 +01005589 break;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02005590 }
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005591 else {
Willy Tarreauec988c72018-12-19 18:00:29 +01005592 cs_set_error(cs);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005593 break;
5594 }
Willy Tarreau0bad0432018-06-14 16:54:01 +02005595
5596 total += ret;
5597 count -= ret;
5598
Willy Tarreau2b778482019-05-06 15:00:22 +02005599 if (h2s->st >= H2_SS_HLOC)
Willy Tarreau0bad0432018-06-14 16:54:01 +02005600 break;
5601
5602 if (h2s->flags & H2_SF_BLK_ANY)
5603 break;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005604 }
5605
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005606 done:
Willy Tarreau2b778482019-05-06 15:00:22 +02005607 if (h2s->st >= H2_SS_HLOC) {
Willy Tarreau00610962018-07-19 10:58:28 +02005608 /* trim any possibly pending data after we close (extra CR-LF,
5609 * unprocessed trailers, abnormal extra data, ...)
5610 */
Willy Tarreau0bad0432018-06-14 16:54:01 +02005611 total += count;
5612 count = 0;
Willy Tarreau00610962018-07-19 10:58:28 +02005613 }
5614
Willy Tarreauc6795ca2017-11-07 09:43:06 +01005615 /* RST are sent similarly to frame acks */
Willy Tarreau02492192017-12-07 15:59:29 +01005616 if (h2s->st == H2_SS_ERROR || h2s->flags & H2_SF_RST_RCVD) {
Willy Tarreauec988c72018-12-19 18:00:29 +01005617 cs_set_error(cs);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01005618 if (h2s_send_rst_stream(h2s->h2c, h2s) > 0)
Willy Tarreau00dd0782018-03-01 16:31:34 +01005619 h2s_close(h2s);
Willy Tarreauc6795ca2017-11-07 09:43:06 +01005620 }
5621
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005622 if (htx) {
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01005623 htx_to_buf(htx, buf);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005624 } else {
5625 b_del(buf, total);
5626 }
Olivier Houchardd846c262018-10-19 17:24:29 +02005627
5628 /* The mux is full, cancel the pending tasks */
5629 if ((h2s->h2c->flags & H2_CF_MUX_BLOCK_ANY) ||
5630 (h2s->flags & H2_SF_BLK_MBUSY))
5631 h2_stop_senders(h2s->h2c);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01005632
Olivier Houchard8122a8d2018-12-03 19:13:29 +01005633 /* If we're running HTX, and we read the whole buffer, then pretend
5634 * we read exactly what the caller specified, as with HTX the caller
5635 * will always give the buffer size, instead of the amount of data
5636 * available.
5637 */
5638 if (htx && !b_data(buf))
5639 total = orig_count;
5640
Olivier Houchard7505f942018-08-21 18:10:44 +02005641 if (total > 0) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005642 if (!(h2s->h2c->wait_event.events & SUB_RETRY_SEND))
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005643 tasklet_wakeup(h2s->h2c->wait_event.task);
Olivier Houchardd846c262018-10-19 17:24:29 +02005644
Olivier Houchard7505f942018-08-21 18:10:44 +02005645 }
Olivier Houchard6dea2ee2018-12-19 18:16:17 +01005646 /* If we're waiting for flow control, and we got a shutr on the
5647 * connection, we will never be unlocked, so add an error on
5648 * the conn_stream.
5649 */
5650 if (conn_xprt_read0_pending(h2s->h2c->conn) &&
5651 !b_data(&h2s->h2c->dbuf) &&
5652 (h2s->flags & (H2_SF_BLK_SFCTL | H2_SF_BLK_MFCTL))) {
5653 if (cs->flags & CS_FL_EOS)
5654 cs->flags |= CS_FL_ERROR;
5655 else
5656 cs->flags |= CS_FL_ERR_PENDING;
5657 }
Olivier Houchard998410a2019-04-15 19:23:37 +02005658 if (total > 0) {
Olivier Houchardd360ac62019-03-22 17:37:16 +01005659 /* Ok we managed to send something, leave the send_list */
Olivier Houchardd360ac62019-03-22 17:37:16 +01005660 LIST_DEL_INIT(&h2s->list);
5661 }
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02005662 return total;
Willy Tarreau62f52692017-10-08 23:01:42 +02005663}
5664
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005665/* for debugging with CLI's "show fd" command */
Willy Tarreau83061a82018-07-13 11:56:34 +02005666static void h2_show_fd(struct buffer *msg, struct connection *conn)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005667{
Willy Tarreau3d2ee552018-12-19 14:12:10 +01005668 struct h2c *h2c = conn->ctx;
Willy Tarreau987c0632018-12-18 10:32:05 +01005669 struct h2s *h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005670 struct eb32_node *node;
5671 int fctl_cnt = 0;
5672 int send_cnt = 0;
5673 int tree_cnt = 0;
5674 int orph_cnt = 0;
Willy Tarreau60f62682019-05-26 11:32:27 +02005675 struct buffer *hmbuf, *tmbuf;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005676
5677 if (!h2c)
5678 return;
5679
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005680 list_for_each_entry(h2s, &h2c->fctl_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005681 fctl_cnt++;
5682
Olivier Houchardfa8aa862018-10-10 18:25:41 +02005683 list_for_each_entry(h2s, &h2c->send_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005684 send_cnt++;
5685
Willy Tarreau3af37712018-12-18 14:34:41 +01005686 h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005687 node = eb32_first(&h2c->streams_by_id);
5688 while (node) {
5689 h2s = container_of(node, struct h2s, by_id);
5690 tree_cnt++;
5691 if (!h2s->cs)
5692 orph_cnt++;
5693 node = eb32_next(node);
5694 }
5695
Willy Tarreau60f62682019-05-26 11:32:27 +02005696 hmbuf = br_head(h2c->mbuf);
Willy Tarreaubcc45952019-05-26 10:05:50 +02005697 tmbuf = br_tail(h2c->mbuf);
Willy Tarreau987c0632018-12-18 10:32:05 +01005698 chunk_appendf(msg, " h2c.st0=%d .err=%d .maxid=%d .lastid=%d .flg=0x%04x"
5699 " .nbst=%u .nbcs=%u .fctl_cnt=%d .send_cnt=%d .tree_cnt=%d"
Willy Tarreau60f62682019-05-26 11:32:27 +02005700 " .orph_cnt=%d .sub=%d .dsi=%d .dbuf=%u@%p+%u/%u .msi=%d"
5701 " .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]",
Willy Tarreau616ac812018-07-24 14:12:42 +02005702 h2c->st0, h2c->errcode, h2c->max_id, h2c->last_sid, h2c->flags,
5703 h2c->nb_streams, h2c->nb_cs, fctl_cnt, send_cnt, tree_cnt, orph_cnt,
Willy Tarreau4f6516d2018-12-19 13:59:17 +01005704 h2c->wait_event.events, h2c->dsi,
Willy Tarreau987c0632018-12-18 10:32:05 +01005705 (unsigned int)b_data(&h2c->dbuf), b_orig(&h2c->dbuf),
5706 (unsigned int)b_head_ofs(&h2c->dbuf), (unsigned int)b_size(&h2c->dbuf),
5707 h2c->msi,
Willy Tarreau60f62682019-05-26 11:32:27 +02005708 br_head_idx(h2c->mbuf), br_tail_idx(h2c->mbuf), br_size(h2c->mbuf),
5709 (unsigned int)b_data(hmbuf), b_orig(hmbuf),
5710 (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf),
Willy Tarreaubcc45952019-05-26 10:05:50 +02005711 (unsigned int)b_data(tmbuf), b_orig(tmbuf),
5712 (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf));
Willy Tarreau987c0632018-12-18 10:32:05 +01005713
5714 if (h2s) {
5715 chunk_appendf(msg, " last_h2s=%p .id=%d .flg=0x%04x .rxbuf=%u@%p+%u/%u .cs=%p",
5716 h2s, h2s->id, h2s->flags,
5717 (unsigned int)b_data(&h2s->rxbuf), b_orig(&h2s->rxbuf),
5718 (unsigned int)b_head_ofs(&h2s->rxbuf), (unsigned int)b_size(&h2s->rxbuf),
5719 h2s->cs);
5720 if (h2s->cs)
5721 chunk_appendf(msg, " .cs.flg=0x%08x .cs.data=%p",
5722 h2s->cs->flags, h2s->cs->data);
5723 }
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005724}
Willy Tarreau62f52692017-10-08 23:01:42 +02005725
5726/*******************************************************/
5727/* functions below are dedicated to the config parsers */
5728/*******************************************************/
5729
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02005730/* config parser for global "tune.h2.header-table-size" */
5731static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx,
5732 struct proxy *defpx, const char *file, int line,
5733 char **err)
5734{
5735 if (too_many_args(1, args, err, NULL))
5736 return -1;
5737
5738 h2_settings_header_table_size = atoi(args[1]);
5739 if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) {
5740 memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]);
5741 return -1;
5742 }
5743 return 0;
5744}
Willy Tarreau62f52692017-10-08 23:01:42 +02005745
Willy Tarreaue6baec02017-07-27 11:45:11 +02005746/* config parser for global "tune.h2.initial-window-size" */
5747static int h2_parse_initial_window_size(char **args, int section_type, struct proxy *curpx,
5748 struct proxy *defpx, const char *file, int line,
5749 char **err)
5750{
5751 if (too_many_args(1, args, err, NULL))
5752 return -1;
5753
5754 h2_settings_initial_window_size = atoi(args[1]);
5755 if (h2_settings_initial_window_size < 0) {
5756 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
5757 return -1;
5758 }
5759 return 0;
5760}
5761
Willy Tarreau5242ef82017-07-27 11:47:28 +02005762/* config parser for global "tune.h2.max-concurrent-streams" */
5763static int h2_parse_max_concurrent_streams(char **args, int section_type, struct proxy *curpx,
5764 struct proxy *defpx, const char *file, int line,
5765 char **err)
5766{
5767 if (too_many_args(1, args, err, NULL))
5768 return -1;
5769
5770 h2_settings_max_concurrent_streams = atoi(args[1]);
Willy Tarreau5a490b62019-01-31 10:39:51 +01005771 if ((int)h2_settings_max_concurrent_streams < 0) {
Willy Tarreau5242ef82017-07-27 11:47:28 +02005772 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
5773 return -1;
5774 }
5775 return 0;
5776}
5777
Willy Tarreaua24b35c2019-02-21 13:24:36 +01005778/* config parser for global "tune.h2.max-frame-size" */
5779static int h2_parse_max_frame_size(char **args, int section_type, struct proxy *curpx,
5780 struct proxy *defpx, const char *file, int line,
5781 char **err)
5782{
5783 if (too_many_args(1, args, err, NULL))
5784 return -1;
5785
5786 h2_settings_max_frame_size = atoi(args[1]);
5787 if (h2_settings_max_frame_size < 16384 || h2_settings_max_frame_size > 16777215) {
5788 memprintf(err, "'%s' expects a numeric value between 16384 and 16777215.", args[0]);
5789 return -1;
5790 }
5791 return 0;
5792}
5793
Willy Tarreau62f52692017-10-08 23:01:42 +02005794
5795/****************************************/
5796/* MUX initialization and instanciation */
5797/***************************************/
5798
5799/* The mux operations */
Willy Tarreau680b2bd2018-11-27 07:30:17 +01005800static const struct mux_ops h2_ops = {
Willy Tarreau62f52692017-10-08 23:01:42 +02005801 .init = h2_init,
Olivier Houchard21df6cc2018-09-14 23:21:44 +02005802 .wake = h2_wake,
Willy Tarreau62f52692017-10-08 23:01:42 +02005803 .snd_buf = h2_snd_buf,
Olivier Houchard511efea2018-08-16 15:30:32 +02005804 .rcv_buf = h2_rcv_buf,
Olivier Houchard6ff20392018-07-17 18:46:31 +02005805 .subscribe = h2_subscribe,
Olivier Houchard83a0cd82018-09-28 17:57:58 +02005806 .unsubscribe = h2_unsubscribe,
Willy Tarreau62f52692017-10-08 23:01:42 +02005807 .attach = h2_attach,
Willy Tarreaufafd3982018-11-18 21:29:20 +01005808 .get_first_cs = h2_get_first_cs,
Willy Tarreau62f52692017-10-08 23:01:42 +02005809 .detach = h2_detach,
Olivier Houchard060ed432018-11-06 16:32:42 +01005810 .destroy = h2_destroy,
Olivier Houchardd540b362018-11-05 18:37:53 +01005811 .avail_streams = h2_avail_streams,
Willy Tarreau00f18a32019-01-26 12:19:01 +01005812 .used_streams = h2_used_streams,
Willy Tarreau62f52692017-10-08 23:01:42 +02005813 .shutr = h2_shutr,
5814 .shutw = h2_shutw,
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02005815 .show_fd = h2_show_fd,
Willy Tarreau28f1cb92017-12-20 16:14:44 +01005816 .flags = MX_FL_CLEAN_ABRT,
Willy Tarreau62f52692017-10-08 23:01:42 +02005817 .name = "H2",
5818};
5819
Christopher Faulet32f61c02018-04-10 14:33:41 +02005820/* PROTO selection : this mux registers PROTO token "h2" */
5821static struct mux_proto_list mux_proto_h2 =
Willy Tarreauf8957272018-10-03 10:25:20 +02005822 { .token = IST("h2"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_FE, .mux = &h2_ops };
Willy Tarreau62f52692017-10-08 23:01:42 +02005823
Willy Tarreau0108d902018-11-25 19:14:37 +01005824INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2);
5825
Christopher Faulet9b579102019-04-11 22:52:25 +02005826
5827/* The mux operations */
5828static const struct mux_ops h2_htx_ops = {
5829 .init = h2_init,
5830 .wake = h2_wake,
5831 .snd_buf = h2_snd_buf,
5832 .rcv_buf = h2_rcv_buf,
5833 .subscribe = h2_subscribe,
5834 .unsubscribe = h2_unsubscribe,
5835 .attach = h2_attach,
5836 .get_first_cs = h2_get_first_cs,
5837 .detach = h2_detach,
5838 .destroy = h2_destroy,
5839 .avail_streams = h2_avail_streams,
5840 .used_streams = h2_used_streams,
5841 .shutr = h2_shutr,
5842 .shutw = h2_shutw,
5843 .show_fd = h2_show_fd,
Christopher Faulet9f38f5a2019-04-03 09:53:32 +02005844 .flags = MX_FL_CLEAN_ABRT|MX_FL_HTX,
Christopher Faulet9b579102019-04-11 22:52:25 +02005845 .name = "H2",
5846};
5847
Willy Tarreauf8957272018-10-03 10:25:20 +02005848static struct mux_proto_list mux_proto_h2_htx =
Christopher Faulet9b579102019-04-11 22:52:25 +02005849 { .token = IST("h2"), .mode = PROTO_MODE_HTX, .side = PROTO_SIDE_BOTH, .mux = &h2_htx_ops };
Willy Tarreauf8957272018-10-03 10:25:20 +02005850
5851INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2_htx);
5852
Willy Tarreau62f52692017-10-08 23:01:42 +02005853/* config keyword parsers */
5854static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02005855 { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size },
Willy Tarreaue6baec02017-07-27 11:45:11 +02005856 { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size },
Willy Tarreau5242ef82017-07-27 11:47:28 +02005857 { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreaua24b35c2019-02-21 13:24:36 +01005858 { CFG_GLOBAL, "tune.h2.max-frame-size", h2_parse_max_frame_size },
Willy Tarreau62f52692017-10-08 23:01:42 +02005859 { 0, NULL, NULL }
5860}};
5861
Willy Tarreau0108d902018-11-25 19:14:37 +01005862INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);