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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 Tarreau2a856182017-05-16 15:20:39 +020032/* dummy streams returned for idle and closed states */
33static const struct h2s *h2_closed_stream;
34static const struct h2s *h2_idle_stream;
35
Willy Tarreau5ab6b572017-09-22 08:05:00 +020036/* Connection flags (32 bit), in h2c->flags */
37#define H2_CF_NONE 0x00000000
38
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020039/* Flags indicating why writing to the mux is blocked. */
40#define H2_CF_MUX_MALLOC 0x00000001 // mux blocked on lack of connection's mux buffer
41#define H2_CF_MUX_MFULL 0x00000002 // mux blocked on connection's mux buffer full
42#define H2_CF_MUX_BLOCK_ANY 0x00000003 // aggregate of the mux flags above
43
Willy Tarreau315d8072017-12-10 22:17:57 +010044/* Flags indicating why writing to the demux is blocked.
45 * The first two ones directly affect the ability for the mux to receive data
46 * from the connection. The other ones affect the mux's ability to demux
47 * received data.
48 */
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020049#define H2_CF_DEM_DALLOC 0x00000004 // demux blocked on lack of connection's demux buffer
50#define H2_CF_DEM_DFULL 0x00000008 // demux blocked on connection's demux buffer full
Willy Tarreau315d8072017-12-10 22:17:57 +010051
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020052#define H2_CF_DEM_MBUSY 0x00000010 // demux blocked on connection's mux side busy
53#define H2_CF_DEM_MROOM 0x00000020 // demux blocked on lack of room in mux buffer
54#define H2_CF_DEM_SALLOC 0x00000040 // demux blocked on lack of stream's request buffer
55#define H2_CF_DEM_SFULL 0x00000080 // demux blocked on stream request buffer full
Willy Tarreauf2101912018-07-19 10:11:38 +020056#define H2_CF_DEM_TOOMANY 0x00000100 // demux blocked waiting for some conn_streams to leave
57#define H2_CF_DEM_BLOCK_ANY 0x000001F0 // aggregate of the demux flags above except DALLOC/DFULL
Willy Tarreau2e5b60e2017-09-25 11:49:03 +020058
Willy Tarreau081d4722017-05-16 21:51:05 +020059/* other flags */
Willy Tarreauf2101912018-07-19 10:11:38 +020060#define H2_CF_GOAWAY_SENT 0x00001000 // a GOAWAY frame was successfully sent
61#define H2_CF_GOAWAY_FAILED 0x00002000 // a GOAWAY frame failed to be sent
62#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 +020063#define H2_CF_IS_BACK 0x00008000 // this is an outgoing connection
Willy Tarreau081d4722017-05-16 21:51:05 +020064
Willy Tarreau5ab6b572017-09-22 08:05:00 +020065/* H2 connection state, in h2c->st0 */
66enum h2_cs {
67 H2_CS_PREFACE, // init done, waiting for connection preface
68 H2_CS_SETTINGS1, // preface OK, waiting for first settings frame
69 H2_CS_FRAME_H, // first settings frame ok, waiting for frame header
70 H2_CS_FRAME_P, // frame header OK, waiting for frame payload
Willy Tarreaua20a5192017-12-27 11:02:06 +010071 H2_CS_FRAME_A, // frame payload OK, trying to send ACK frame
72 H2_CS_FRAME_E, // frame payload OK, trying to send RST frame
Willy Tarreau5ab6b572017-09-22 08:05:00 +020073 H2_CS_ERROR, // send GOAWAY(errcode) and close the connection ASAP
74 H2_CS_ERROR2, // GOAWAY(errcode) sent, close the connection ASAP
75 H2_CS_ENTRIES // must be last
76} __attribute__((packed));
77
78/* H2 connection descriptor */
79struct h2c {
80 struct connection *conn;
81
82 enum h2_cs st0; /* mux state */
83 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
84
85 /* 16 bit hole here */
86 uint32_t flags; /* connection flags: H2_CF_* */
87 int32_t max_id; /* highest ID known on this connection, <0 before preface */
88 uint32_t rcvd_c; /* newly received data to ACK for the connection */
89 uint32_t rcvd_s; /* newly received data to ACK for the current stream (dsi) */
90
91 /* states for the demux direction */
92 struct hpack_dht *ddht; /* demux dynamic header table */
Willy Tarreauc9fa0482018-07-10 17:43:27 +020093 struct buffer dbuf; /* demux buffer */
Willy Tarreau5ab6b572017-09-22 08:05:00 +020094
95 int32_t dsi; /* demux stream ID (<0 = idle) */
96 int32_t dfl; /* demux frame length (if dsi >= 0) */
97 int8_t dft; /* demux frame type (if dsi >= 0) */
98 int8_t dff; /* demux frame flags (if dsi >= 0) */
Willy Tarreau05e5daf2017-12-11 15:17:36 +010099 uint8_t dpl; /* demux pad length (part of dfl), init to 0 */
100 /* 8 bit hole here */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200101 int32_t last_sid; /* last processed stream ID for GOAWAY, <0 before preface */
102
103 /* states for the mux direction */
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200104 struct buffer mbuf; /* mux buffer */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200105 int32_t msi; /* mux stream ID (<0 = idle) */
106 int32_t mfl; /* mux frame length (if dsi >= 0) */
107 int8_t mft; /* mux frame type (if dsi >= 0) */
108 int8_t mff; /* mux frame flags (if dsi >= 0) */
109 /* 16 bit hole here */
110 int32_t miw; /* mux initial window size for all new streams */
111 int32_t mws; /* mux window size. Can be negative. */
112 int32_t mfs; /* mux's max frame size */
113
Willy Tarreauea392822017-10-31 10:02:25 +0100114 int timeout; /* idle timeout duration in ticks */
Willy Tarreau599391a2017-11-24 10:16:00 +0100115 int shut_timeout; /* idle timeout duration in ticks after GOAWAY was sent */
Willy Tarreau49745612017-12-03 18:56:02 +0100116 unsigned int nb_streams; /* number of streams in the tree */
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200117 unsigned int nb_cs; /* number of attached conn_streams */
Willy Tarreau0b37d652018-10-03 10:33:02 +0200118 struct proxy *proxy; /* the proxy this connection was created for */
Willy Tarreauea392822017-10-31 10:02:25 +0100119 struct task *task; /* timeout management task */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200120 struct eb_root streams_by_id; /* all active streams by their ID */
121 struct list send_list; /* list of blocked streams requesting to send */
122 struct list fctl_list; /* list of streams blocked by connection's fctl */
Olivier Houchardd846c262018-10-19 17:24:29 +0200123 struct list sending_list; /* list of h2s scheduled to send data */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100124 struct buffer_wait buf_wait; /* wait list for buffer allocations */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200125 struct wait_event wait_event; /* To be used if we're waiting for I/Os */
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200126};
127
Willy Tarreau18312642017-10-11 07:57:07 +0200128/* H2 stream state, in h2s->st */
129enum h2_ss {
130 H2_SS_IDLE = 0, // idle
131 H2_SS_RLOC, // reserved(local)
132 H2_SS_RREM, // reserved(remote)
133 H2_SS_OPEN, // open
134 H2_SS_HREM, // half-closed(remote)
135 H2_SS_HLOC, // half-closed(local)
Willy Tarreau96060ba2017-10-16 18:34:34 +0200136 H2_SS_ERROR, // an error needs to be sent using RST_STREAM
Willy Tarreau18312642017-10-11 07:57:07 +0200137 H2_SS_CLOSED, // closed
138 H2_SS_ENTRIES // must be last
139} __attribute__((packed));
140
141/* HTTP/2 stream flags (32 bit), in h2s->flags */
142#define H2_SF_NONE 0x00000000
143#define H2_SF_ES_RCVD 0x00000001
144#define H2_SF_ES_SENT 0x00000002
145
146#define H2_SF_RST_RCVD 0x00000004 // received RST_STREAM
147#define H2_SF_RST_SENT 0x00000008 // sent RST_STREAM
148
Willy Tarreau2e5b60e2017-09-25 11:49:03 +0200149/* stream flags indicating the reason the stream is blocked */
150#define H2_SF_BLK_MBUSY 0x00000010 // blocked waiting for mux access (transient)
151#define H2_SF_BLK_MROOM 0x00000020 // blocked waiting for room in the mux
152#define H2_SF_BLK_MFCTL 0x00000040 // blocked due to mux fctl
153#define H2_SF_BLK_SFCTL 0x00000080 // blocked due to stream fctl
154#define H2_SF_BLK_ANY 0x000000F0 // any of the reasons above
155
Willy Tarreau454f9052017-10-26 19:40:35 +0200156/* stream flags indicating how data is supposed to be sent */
157#define H2_SF_DATA_CLEN 0x00000100 // data sent using content-length
158#define H2_SF_DATA_CHNK 0x00000200 // data sent using chunked-encoding
159
160/* step we're currently in when sending chunks. This is needed because we may
161 * have to transfer chunks as large as a full buffer so there's no room left
162 * for size nor crlf around.
163 */
164#define H2_SF_CHNK_SIZE 0x00000000 // trying to send chunk size
165#define H2_SF_CHNK_DATA 0x00000400 // trying to send chunk data
166#define H2_SF_CHNK_CRLF 0x00000800 // trying to send chunk crlf after data
167
168#define H2_SF_CHNK_MASK 0x00000C00 // trying to send chunk size
169
Willy Tarreau67434202017-11-06 20:20:51 +0100170#define H2_SF_HEADERS_SENT 0x00001000 // a HEADERS frame was sent for this stream
Willy Tarreauc4312d32017-11-07 12:01:53 +0100171#define H2_SF_OUTGOING_DATA 0x00002000 // set whenever we've seen outgoing data
Willy Tarreau67434202017-11-06 20:20:51 +0100172
Willy Tarreau18312642017-10-11 07:57:07 +0200173/* H2 stream descriptor, describing the stream as it appears in the H2C, and as
174 * it is being processed in the internal HTTP representation (H1 for now).
175 */
176struct h2s {
177 struct conn_stream *cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +0100178 struct session *sess;
Willy Tarreau18312642017-10-11 07:57:07 +0200179 struct h2c *h2c;
Willy Tarreaua40704a2018-09-11 13:52:04 +0200180 struct h1m h1m; /* request or response parser state for H1 */
Willy Tarreau18312642017-10-11 07:57:07 +0200181 struct eb32_node by_id; /* place in h2c's streams_by_id */
Willy Tarreau18312642017-10-11 07:57:07 +0200182 int32_t id; /* stream ID */
183 uint32_t flags; /* H2_SF_* */
184 int mws; /* mux window size for this stream */
185 enum h2_err errcode; /* H2 err code (H2_ERR_*) */
186 enum h2_ss st;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +0200187 uint16_t status; /* HTTP response status */
Olivier Houchard638b7992018-08-16 15:41:52 +0200188 struct buffer rxbuf; /* receive buffer, always valid (buf_empty or real buffer) */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200189 struct wait_event wait_event; /* Wait list, when we're attempting to send a RST but we can't send */
190 struct wait_event *recv_wait; /* Address of the wait_event the conn_stream associated is waiting on */
191 struct wait_event *send_wait; /* The streeam is waiting for flow control */
192 struct list list; /* To be used when adding in h2c->send_list or h2c->fctl_lsit */
Willy Tarreau18312642017-10-11 07:57:07 +0200193};
Willy Tarreau5ab6b572017-09-22 08:05:00 +0200194
Willy Tarreauc6405142017-09-21 20:23:50 +0200195/* descriptor for an h2 frame header */
196struct h2_fh {
197 uint32_t len; /* length, host order, 24 bits */
198 uint32_t sid; /* stream id, host order, 31 bits */
199 uint8_t ft; /* frame type */
200 uint8_t ff; /* frame flags */
201};
202
Willy Tarreau8ceae722018-11-26 11:58:30 +0100203/* the h2c connection pool */
204DECLARE_STATIC_POOL(pool_head_h2c, "h2c", sizeof(struct h2c));
205
206/* the h2s stream pool */
207DECLARE_STATIC_POOL(pool_head_h2s, "h2s", sizeof(struct h2s));
208
Willy Tarreaudc572362018-12-12 08:08:05 +0100209/* The default connection window size is 65535, it may only be enlarged using
210 * a WINDOW_UPDATE message. Since the window must never be larger than 2G-1,
211 * we'll pretend we already received the difference between the two to send
212 * an equivalent window update to enlarge it to 2G-1.
213 */
214#define H2_INITIAL_WINDOW_INCREMENT ((1U<<31)-1 - 65535)
215
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200216/* a few settings from the global section */
217static int h2_settings_header_table_size = 4096; /* initial value */
Willy Tarreaue6baec02017-07-27 11:45:11 +0200218static int h2_settings_initial_window_size = 65535; /* initial value */
Willy Tarreau5242ef82017-07-27 11:47:28 +0200219static int h2_settings_max_concurrent_streams = 100;
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200220
Willy Tarreau2a856182017-05-16 15:20:39 +0200221/* a dmumy closed stream */
222static const struct h2s *h2_closed_stream = &(const struct h2s){
223 .cs = NULL,
224 .h2c = NULL,
225 .st = H2_SS_CLOSED,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100226 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreauab837502017-12-27 15:07:30 +0100227 .flags = H2_SF_RST_RCVD,
Willy Tarreau2a856182017-05-16 15:20:39 +0200228 .id = 0,
229};
230
231/* and a dummy idle stream for use with any unannounced stream */
232static const struct h2s *h2_idle_stream = &(const struct h2s){
233 .cs = NULL,
234 .h2c = NULL,
235 .st = H2_SS_IDLE,
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +0100236 .errcode = H2_ERR_STREAM_CLOSED,
Willy Tarreau2a856182017-05-16 15:20:39 +0200237 .id = 0,
238};
239
Olivier Houchard9f6af332018-05-25 14:04:04 +0200240static struct task *h2_timeout_task(struct task *t, void *context, unsigned short state);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +0200241static int h2_send(struct h2c *h2c);
242static int h2_recv(struct h2c *h2c);
Olivier Houchard7505f942018-08-21 18:10:44 +0200243static int h2_process(struct h2c *h2c);
Olivier Houchard29fb89d2018-08-02 18:56:36 +0200244static struct task *h2_io_cb(struct task *t, void *ctx, unsigned short state);
Willy Tarreau0b559072018-02-26 15:22:17 +0100245static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id);
Willy Tarreauc3e18f32018-10-08 14:51:56 +0200246static int h2s_decode_headers(struct h2s *h2s);
Willy Tarreaua56a6de2018-02-26 15:59:07 +0100247static int h2_frt_transfer_data(struct h2s *h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +0200248static struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned short state);
Olivier Houchardf502aca2018-12-14 19:42:40 +0100249static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess);
Willy Tarreaufe20e5b2017-07-27 11:42:14 +0200250
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200251/*****************************************************/
252/* functions below are for dynamic buffer management */
253/*****************************************************/
254
Willy Tarreau315d8072017-12-10 22:17:57 +0100255/* indicates whether or not the we may call the h2_recv() function to attempt
256 * to receive data into the buffer and/or demux pending data. The condition is
257 * a bit complex due to some API limits for now. The rules are the following :
258 * - if an error or a shutdown was detected on the connection and the buffer
259 * is empty, we must not attempt to receive
260 * - if the demux buf failed to be allocated, we must not try to receive and
261 * we know there is nothing pending
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100262 * - if no flag indicates a blocking condition, we may attempt to receive,
263 * regardless of whether the demux buffer is full or not, so that only
264 * de demux part decides whether or not to block. This is needed because
265 * the connection API indeed prevents us from re-enabling receipt that is
266 * already enabled in a polled state, so we must always immediately stop
267 * as soon as the demux can't proceed so as never to hit an end of read
268 * with data pending in the buffers.
Willy Tarreau315d8072017-12-10 22:17:57 +0100269 * - otherwise must may not attempt
270 */
271static inline int h2_recv_allowed(const struct h2c *h2c)
272{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200273 if (b_data(&h2c->dbuf) == 0 &&
Willy Tarreau315d8072017-12-10 22:17:57 +0100274 (h2c->st0 >= H2_CS_ERROR ||
275 h2c->conn->flags & CO_FL_ERROR ||
276 conn_xprt_read0_pending(h2c->conn)))
277 return 0;
278
279 if (!(h2c->flags & H2_CF_DEM_DALLOC) &&
Willy Tarreau6042aeb2017-12-12 11:01:44 +0100280 !(h2c->flags & H2_CF_DEM_BLOCK_ANY))
Willy Tarreau315d8072017-12-10 22:17:57 +0100281 return 1;
282
283 return 0;
284}
285
Willy Tarreauf2101912018-07-19 10:11:38 +0200286/* returns true if the connection has too many conn_streams attached */
287static inline int h2_has_too_many_cs(const struct h2c *h2c)
288{
289 return h2c->nb_cs >= h2_settings_max_concurrent_streams;
290}
291
Willy Tarreau44e973f2018-03-01 17:49:30 +0100292/* Tries to grab a buffer and to re-enable processing on mux <target>. The h2c
293 * flags are used to figure what buffer was requested. It returns 1 if the
294 * allocation succeeds, in which case the connection is woken up, or 0 if it's
295 * impossible to wake up and we prefer to be woken up later.
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200296 */
Willy Tarreau44e973f2018-03-01 17:49:30 +0100297static int h2_buf_available(void *target)
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200298{
299 struct h2c *h2c = target;
Willy Tarreau0b559072018-02-26 15:22:17 +0100300 struct h2s *h2s;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200301
Willy Tarreau44e973f2018-03-01 17:49:30 +0100302 if ((h2c->flags & H2_CF_DEM_DALLOC) && b_alloc_margin(&h2c->dbuf, 0)) {
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200303 h2c->flags &= ~H2_CF_DEM_DALLOC;
Olivier Houchard53216e72018-10-10 15:46:36 +0200304 if (h2_recv_allowed(h2c))
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200305 tasklet_wakeup(h2c->wait_event.task);
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200306 return 1;
307 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200308
Willy Tarreau44e973f2018-03-01 17:49:30 +0100309 if ((h2c->flags & H2_CF_MUX_MALLOC) && b_alloc_margin(&h2c->mbuf, 0)) {
310 h2c->flags &= ~H2_CF_MUX_MALLOC;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200311
312 if (h2c->flags & H2_CF_DEM_MROOM) {
313 h2c->flags &= ~H2_CF_DEM_MROOM;
Olivier Houchard53216e72018-10-10 15:46:36 +0200314 if (h2_recv_allowed(h2c))
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200315 tasklet_wakeup(h2c->wait_event.task);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +0200316 }
Willy Tarreau14398122017-09-22 14:26:04 +0200317 return 1;
318 }
Willy Tarreau0b559072018-02-26 15:22:17 +0100319
320 if ((h2c->flags & H2_CF_DEM_SALLOC) &&
321 (h2s = h2c_st_by_id(h2c, h2c->dsi)) && h2s->cs &&
Olivier Houchard638b7992018-08-16 15:41:52 +0200322 b_alloc_margin(&h2s->rxbuf, 0)) {
Willy Tarreau0b559072018-02-26 15:22:17 +0100323 h2c->flags &= ~H2_CF_DEM_SALLOC;
Olivier Houchard53216e72018-10-10 15:46:36 +0200324 if (h2_recv_allowed(h2c))
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200325 tasklet_wakeup(h2c->wait_event.task);
Willy Tarreau0b559072018-02-26 15:22:17 +0100326 return 1;
327 }
328
Willy Tarreau14398122017-09-22 14:26:04 +0200329 return 0;
330}
331
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200332static inline struct buffer *h2_get_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200333{
334 struct buffer *buf = NULL;
335
Willy Tarreau44e973f2018-03-01 17:49:30 +0100336 if (likely(LIST_ISEMPTY(&h2c->buf_wait.list)) &&
337 unlikely((buf = b_alloc_margin(bptr, 0)) == NULL)) {
338 h2c->buf_wait.target = h2c;
339 h2c->buf_wait.wakeup_cb = h2_buf_available;
Christopher Faulet2a944ee2017-11-07 10:42:54 +0100340 HA_SPIN_LOCK(BUF_WQ_LOCK, &buffer_wq_lock);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100341 LIST_ADDQ(&buffer_wq, &h2c->buf_wait.list);
Christopher Faulet2a944ee2017-11-07 10:42:54 +0100342 HA_SPIN_UNLOCK(BUF_WQ_LOCK, &buffer_wq_lock);
Willy Tarreau14398122017-09-22 14:26:04 +0200343 __conn_xprt_stop_recv(h2c->conn);
344 }
345 return buf;
346}
347
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200348static inline void h2_release_buf(struct h2c *h2c, struct buffer *bptr)
Willy Tarreau14398122017-09-22 14:26:04 +0200349{
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200350 if (bptr->size) {
Willy Tarreau44e973f2018-03-01 17:49:30 +0100351 b_free(bptr);
Olivier Houchard673867c2018-05-25 16:58:52 +0200352 offer_buffers(h2c->buf_wait.target, tasks_run_queue);
Willy Tarreau14398122017-09-22 14:26:04 +0200353 }
354}
355
Olivier Houchardd540b362018-11-05 18:37:53 +0100356static int h2_avail_streams(struct connection *conn)
357{
358 struct h2c *h2c = conn->mux_ctx;
359
Olivier Houchard8defe4b2018-12-02 01:31:17 +0100360 /* XXX Should use the negociated max concurrent stream nb instead of the conf value */
Olivier Houchardd540b362018-11-05 18:37:53 +0100361 return (h2_settings_max_concurrent_streams - h2c->nb_streams);
362}
363
Olivier Houchard8defe4b2018-12-02 01:31:17 +0100364static int h2_max_streams(struct connection *conn)
365{
366 /* XXX Should use the negociated max concurrent stream nb instead of the conf value */
367 return h2_settings_max_concurrent_streams;
368}
369
Willy Tarreau35dbd5d2017-09-22 09:13:49 +0200370
Willy Tarreau62f52692017-10-08 23:01:42 +0200371/*****************************************************************/
372/* functions below are dedicated to the mux setup and management */
373/*****************************************************************/
374
Willy Tarreau7dc24e42018-10-03 13:52:41 +0200375/* Initialize the mux once it's attached. For outgoing connections, the context
376 * is already initialized before installing the mux, so we detect incoming
377 * connections from the fact that the context is still NULL. Returns < 0 on
378 * error.
379 */
Olivier Houchardf502aca2018-12-14 19:42:40 +0100380static int h2_init(struct connection *conn, struct proxy *prx, struct session *sess)
Willy Tarreau32218eb2017-09-22 08:07:25 +0200381{
382 struct h2c *h2c;
Willy Tarreauea392822017-10-31 10:02:25 +0100383 struct task *t = NULL;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200384
Willy Tarreaubafbe012017-11-24 17:34:44 +0100385 h2c = pool_alloc(pool_head_h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200386 if (!h2c)
mildiscd2d7de2018-10-02 16:44:18 +0200387 goto fail_no_h2c;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200388
Willy Tarreau01b44822018-10-03 14:26:37 +0200389 if (conn->mux_ctx) {
390 h2c->flags = H2_CF_IS_BACK;
391 h2c->shut_timeout = h2c->timeout = prx->timeout.server;
392 if (tick_isset(prx->timeout.serverfin))
393 h2c->shut_timeout = prx->timeout.serverfin;
394 } else {
395 h2c->flags = H2_CF_NONE;
396 h2c->shut_timeout = h2c->timeout = prx->timeout.client;
397 if (tick_isset(prx->timeout.clientfin))
398 h2c->shut_timeout = prx->timeout.clientfin;
399 }
Willy Tarreau3f133572017-10-31 19:21:06 +0100400
Willy Tarreau0b37d652018-10-03 10:33:02 +0200401 h2c->proxy = prx;
Willy Tarreau33400292017-11-05 11:23:40 +0100402 h2c->task = NULL;
Willy Tarreau3f133572017-10-31 19:21:06 +0100403 if (tick_isset(h2c->timeout)) {
404 t = task_new(tid_bit);
405 if (!t)
406 goto fail;
407
408 h2c->task = t;
409 t->process = h2_timeout_task;
410 t->context = h2c;
411 t->expire = tick_add(now_ms, h2c->timeout);
412 }
Willy Tarreauea392822017-10-31 10:02:25 +0100413
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200414 h2c->wait_event.task = tasklet_new();
415 if (!h2c->wait_event.task)
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200416 goto fail;
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200417 h2c->wait_event.task->process = h2_io_cb;
418 h2c->wait_event.task->context = h2c;
419 h2c->wait_event.wait_reason = 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200420
Willy Tarreau32218eb2017-09-22 08:07:25 +0200421 h2c->ddht = hpack_dht_alloc(h2_settings_header_table_size);
422 if (!h2c->ddht)
423 goto fail;
424
425 /* Initialise the context. */
426 h2c->st0 = H2_CS_PREFACE;
427 h2c->conn = conn;
428 h2c->max_id = -1;
429 h2c->errcode = H2_ERR_NO_ERROR;
Willy Tarreaudc572362018-12-12 08:08:05 +0100430 h2c->rcvd_c = H2_INITIAL_WINDOW_INCREMENT;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200431 h2c->rcvd_s = 0;
Willy Tarreau49745612017-12-03 18:56:02 +0100432 h2c->nb_streams = 0;
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200433 h2c->nb_cs = 0;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200434
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200435 h2c->dbuf = BUF_NULL;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200436 h2c->dsi = -1;
437 h2c->msi = -1;
438 h2c->last_sid = -1;
439
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200440 h2c->mbuf = BUF_NULL;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200441 h2c->miw = 65535; /* mux initial window size */
442 h2c->mws = 65535; /* mux window size */
443 h2c->mfs = 16384; /* initial max frame size */
Willy Tarreau751f2d02018-10-05 09:35:00 +0200444 h2c->streams_by_id = EB_ROOT;
Willy Tarreau32218eb2017-09-22 08:07:25 +0200445 LIST_INIT(&h2c->send_list);
446 LIST_INIT(&h2c->fctl_list);
Olivier Houchardd846c262018-10-19 17:24:29 +0200447 LIST_INIT(&h2c->sending_list);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100448 LIST_INIT(&h2c->buf_wait.list);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200449
Willy Tarreau3f133572017-10-31 19:21:06 +0100450 if (t)
451 task_queue(t);
Willy Tarreauea392822017-10-31 10:02:25 +0100452
Willy Tarreau01b44822018-10-03 14:26:37 +0200453 if (h2c->flags & H2_CF_IS_BACK) {
454 /* FIXME: this is temporary, for outgoing connections we need
455 * to immediately allocate a stream until the code is modified
456 * so that the caller calls ->attach(). For now the outgoing cs
457 * is stored as conn->mux_ctx by the caller.
458 */
459 struct h2s *h2s;
460
Olivier Houchardf502aca2018-12-14 19:42:40 +0100461 h2s = h2c_bck_stream_new(h2c, conn->mux_ctx, sess);
Willy Tarreau01b44822018-10-03 14:26:37 +0200462 if (!h2s)
463 goto fail_stream;
464 }
465
466 conn->mux_ctx = h2c;
467
Willy Tarreau0f383582018-10-03 14:22:21 +0200468 /* prepare to read something */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200469 tasklet_wakeup(h2c->wait_event.task);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200470 return 0;
Willy Tarreau01b44822018-10-03 14:26:37 +0200471 fail_stream:
472 hpack_dht_free(h2c->ddht);
mildiscd2d7de2018-10-02 16:44:18 +0200473 fail:
Willy Tarreauea392822017-10-31 10:02:25 +0100474 if (t)
475 task_free(t);
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200476 if (h2c->wait_event.task)
477 tasklet_free(h2c->wait_event.task);
Willy Tarreaubafbe012017-11-24 17:34:44 +0100478 pool_free(pool_head_h2c, h2c);
mildiscd2d7de2018-10-02 16:44:18 +0200479 fail_no_h2c:
Willy Tarreau32218eb2017-09-22 08:07:25 +0200480 return -1;
481}
482
Willy Tarreau751f2d02018-10-05 09:35:00 +0200483/* returns the next allocatable outgoing stream ID for the H2 connection, or
484 * -1 if no more is allocatable.
485 */
486static inline int32_t h2c_get_next_sid(const struct h2c *h2c)
487{
488 int32_t id = (h2c->max_id + 1) | 1;
489 if (id & 0x80000000U)
490 id = -1;
491 return id;
492}
493
Willy Tarreau2373acc2017-10-12 17:35:14 +0200494/* returns the stream associated with id <id> or NULL if not found */
495static inline struct h2s *h2c_st_by_id(struct h2c *h2c, int id)
496{
497 struct eb32_node *node;
498
Willy Tarreau751f2d02018-10-05 09:35:00 +0200499 if (id == 0)
500 return (struct h2s *)h2_closed_stream;
501
Willy Tarreau2a856182017-05-16 15:20:39 +0200502 if (id > h2c->max_id)
503 return (struct h2s *)h2_idle_stream;
504
Willy Tarreau2373acc2017-10-12 17:35:14 +0200505 node = eb32_lookup(&h2c->streams_by_id, id);
506 if (!node)
Willy Tarreau2a856182017-05-16 15:20:39 +0200507 return (struct h2s *)h2_closed_stream;
Willy Tarreau2373acc2017-10-12 17:35:14 +0200508
509 return container_of(node, struct h2s, by_id);
510}
511
Willy Tarreau62f52692017-10-08 23:01:42 +0200512/* release function for a connection. This one should be called to free all
513 * resources allocated to the mux.
514 */
515static void h2_release(struct connection *conn)
516{
Willy Tarreau32218eb2017-09-22 08:07:25 +0200517 struct h2c *h2c = conn->mux_ctx;
518
519 LIST_DEL(&conn->list);
520
521 if (h2c) {
522 hpack_dht_free(h2c->ddht);
Willy Tarreau14398122017-09-22 14:26:04 +0200523
Christopher Faulet2a944ee2017-11-07 10:42:54 +0100524 HA_SPIN_LOCK(BUF_WQ_LOCK, &buffer_wq_lock);
Willy Tarreau44e973f2018-03-01 17:49:30 +0100525 LIST_DEL(&h2c->buf_wait.list);
Christopher Faulet2a944ee2017-11-07 10:42:54 +0100526 HA_SPIN_UNLOCK(BUF_WQ_LOCK, &buffer_wq_lock);
Willy Tarreau14398122017-09-22 14:26:04 +0200527
Willy Tarreau44e973f2018-03-01 17:49:30 +0100528 h2_release_buf(h2c, &h2c->dbuf);
529 h2_release_buf(h2c, &h2c->mbuf);
530
Willy Tarreauea392822017-10-31 10:02:25 +0100531 if (h2c->task) {
Willy Tarreau0975f112018-03-29 15:22:59 +0200532 h2c->task->context = NULL;
533 task_wakeup(h2c->task, TASK_WOKEN_OTHER);
Willy Tarreauea392822017-10-31 10:02:25 +0100534 h2c->task = NULL;
535 }
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200536 if (h2c->wait_event.task)
537 tasklet_free(h2c->wait_event.task);
538 if (h2c->wait_event.wait_reason != 0)
539 conn->xprt->unsubscribe(conn, h2c->wait_event.wait_reason,
540 &h2c->wait_event);
Willy Tarreauea392822017-10-31 10:02:25 +0100541
Willy Tarreaubafbe012017-11-24 17:34:44 +0100542 pool_free(pool_head_h2c, h2c);
Willy Tarreau32218eb2017-09-22 08:07:25 +0200543 }
544
545 conn->mux = NULL;
546 conn->mux_ctx = NULL;
547
548 conn_stop_tracking(conn);
549 conn_full_close(conn);
550 if (conn->destroy_cb)
551 conn->destroy_cb(conn);
552 conn_free(conn);
Willy Tarreau62f52692017-10-08 23:01:42 +0200553}
554
555
Willy Tarreau71681172017-10-23 14:39:06 +0200556/******************************************************/
557/* functions below are for the H2 protocol processing */
558/******************************************************/
559
560/* returns the stream if of stream <h2s> or 0 if <h2s> is NULL */
Willy Tarreau1f094672017-11-20 21:27:45 +0100561static inline __maybe_unused int h2s_id(const struct h2s *h2s)
Willy Tarreau71681172017-10-23 14:39:06 +0200562{
563 return h2s ? h2s->id : 0;
564}
565
Willy Tarreau5b5e6872017-09-25 16:17:25 +0200566/* returns true of the mux is currently busy as seen from stream <h2s> */
Willy Tarreau1f094672017-11-20 21:27:45 +0100567static inline __maybe_unused int h2c_mux_busy(const struct h2c *h2c, const struct h2s *h2s)
Willy Tarreau5b5e6872017-09-25 16:17:25 +0200568{
569 if (h2c->msi < 0)
570 return 0;
571
572 if (h2c->msi == h2s_id(h2s))
573 return 0;
574
575 return 1;
576}
577
Willy Tarreau741d6df2017-10-17 08:00:59 +0200578/* marks an error on the connection */
Willy Tarreau1f094672017-11-20 21:27:45 +0100579static inline __maybe_unused void h2c_error(struct h2c *h2c, enum h2_err err)
Willy Tarreau741d6df2017-10-17 08:00:59 +0200580{
581 h2c->errcode = err;
582 h2c->st0 = H2_CS_ERROR;
583}
584
Willy Tarreau2e43f082017-10-17 08:03:59 +0200585/* marks an error on the stream */
Willy Tarreau1f094672017-11-20 21:27:45 +0100586static inline __maybe_unused void h2s_error(struct h2s *h2s, enum h2_err err)
Willy Tarreau2e43f082017-10-17 08:03:59 +0200587{
Willy Tarreauab0e1da2018-10-05 10:16:37 +0200588 if (h2s->id && h2s->st < H2_SS_ERROR) {
Willy Tarreau2e43f082017-10-17 08:03:59 +0200589 h2s->errcode = err;
590 h2s->st = H2_SS_ERROR;
591 if (h2s->cs)
592 h2s->cs->flags |= CS_FL_ERROR;
593 }
594}
595
Willy Tarreaue4820742017-07-27 13:37:23 +0200596/* writes the 24-bit frame size <len> at address <frame> */
Willy Tarreau1f094672017-11-20 21:27:45 +0100597static inline __maybe_unused void h2_set_frame_size(void *frame, uint32_t len)
Willy Tarreaue4820742017-07-27 13:37:23 +0200598{
599 uint8_t *out = frame;
600
601 *out = len >> 16;
602 write_n16(out + 1, len);
603}
604
Willy Tarreau54c15062017-10-10 17:10:03 +0200605/* reads <bytes> bytes from buffer <b> starting at relative offset <o> from the
606 * current pointer, dealing with wrapping, and stores the result in <dst>. It's
607 * the caller's responsibility to verify that there are at least <bytes> bytes
Willy Tarreau9c7f2d12018-06-15 11:51:32 +0200608 * available in the buffer's input prior to calling this function. The buffer
609 * is assumed not to hold any output data.
Willy Tarreau54c15062017-10-10 17:10:03 +0200610 */
Willy Tarreau1f094672017-11-20 21:27:45 +0100611static inline __maybe_unused void h2_get_buf_bytes(void *dst, size_t bytes,
Willy Tarreau54c15062017-10-10 17:10:03 +0200612 const struct buffer *b, int o)
613{
Willy Tarreau591d4452018-06-15 17:21:00 +0200614 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 +0200615}
616
Willy Tarreau1f094672017-11-20 21:27:45 +0100617static inline __maybe_unused uint16_t h2_get_n16(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +0200618{
Willy Tarreau591d4452018-06-15 17:21:00 +0200619 return readv_n16(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +0200620}
621
Willy Tarreau1f094672017-11-20 21:27:45 +0100622static inline __maybe_unused uint32_t h2_get_n32(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +0200623{
Willy Tarreau591d4452018-06-15 17:21:00 +0200624 return readv_n32(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +0200625}
626
Willy Tarreau1f094672017-11-20 21:27:45 +0100627static inline __maybe_unused uint64_t h2_get_n64(const struct buffer *b, int o)
Willy Tarreau54c15062017-10-10 17:10:03 +0200628{
Willy Tarreau591d4452018-06-15 17:21:00 +0200629 return readv_n64(b_peek(b, o), b_wrap(b) - b_peek(b, o), b_orig(b));
Willy Tarreau54c15062017-10-10 17:10:03 +0200630}
631
632
Willy Tarreau715d5312017-07-11 15:20:24 +0200633/* Peeks an H2 frame header from buffer <b> into descriptor <h>. The algorithm
634 * is not obvious. It turns out that H2 headers are neither aligned nor do they
635 * use regular sizes. And to add to the trouble, the buffer may wrap so each
636 * byte read must be checked. The header is formed like this :
637 *
638 * b0 b1 b2 b3 b4 b5..b8
639 * +----------+---------+--------+----+----+----------------------+
640 * |len[23:16]|len[15:8]|len[7:0]|type|flag|sid[31:0] (big endian)|
641 * +----------+---------+--------+----+----+----------------------+
642 *
643 * Here we read a big-endian 64 bit word from h[1]. This way in a single read
644 * we get the sid properly aligned and ordered, and 16 bits of len properly
645 * ordered as well. The type and flags can be extracted using bit shifts from
646 * the word, and only one extra read is needed to fetch len[16:23].
Willy Tarreau9c7f2d12018-06-15 11:51:32 +0200647 * Returns zero if some bytes are missing, otherwise non-zero on success. The
648 * buffer is assumed not to contain any output data.
Willy Tarreau715d5312017-07-11 15:20:24 +0200649 */
Willy Tarreau1f094672017-11-20 21:27:45 +0100650static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +0200651{
652 uint64_t w;
653
Willy Tarreaub7b5fe12018-06-18 13:33:09 +0200654 if (b_data(b) < 9)
Willy Tarreau715d5312017-07-11 15:20:24 +0200655 return 0;
656
Willy Tarreau9c7f2d12018-06-15 11:51:32 +0200657 w = h2_get_n64(b, 1);
Willy Tarreaub7b5fe12018-06-18 13:33:09 +0200658 h->len = *(uint8_t*)b_head(b) << 16;
Willy Tarreau715d5312017-07-11 15:20:24 +0200659 h->sid = w & 0x7FFFFFFF; /* RFC7540#4.1: R bit must be ignored */
660 h->ff = w >> 32;
661 h->ft = w >> 40;
662 h->len += w >> 48;
663 return 1;
664}
665
666/* skip the next 9 bytes corresponding to the frame header possibly parsed by
667 * h2_peek_frame_hdr() above.
668 */
Willy Tarreau1f094672017-11-20 21:27:45 +0100669static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b)
Willy Tarreau715d5312017-07-11 15:20:24 +0200670{
Willy Tarreaue5f12ce2018-06-15 10:28:05 +0200671 b_del(b, 9);
Willy Tarreau715d5312017-07-11 15:20:24 +0200672}
673
674/* same as above, automatically advances the buffer on success */
Willy Tarreau1f094672017-11-20 21:27:45 +0100675static inline __maybe_unused int h2_get_frame_hdr(struct buffer *b, struct h2_fh *h)
Willy Tarreau715d5312017-07-11 15:20:24 +0200676{
677 int ret;
678
679 ret = h2_peek_frame_hdr(b, h);
680 if (ret > 0)
681 h2_skip_frame_hdr(b);
682 return ret;
683}
684
Willy Tarreau00dd0782018-03-01 16:31:34 +0100685/* marks stream <h2s> as CLOSED and decrement the number of active streams for
686 * its connection if the stream was not yet closed. Please use this exclusively
687 * before closing a stream to ensure stream count is well maintained.
Willy Tarreau91bfdd72017-12-14 12:00:14 +0100688 */
Willy Tarreau00dd0782018-03-01 16:31:34 +0100689static inline void h2s_close(struct h2s *h2s)
Willy Tarreau91bfdd72017-12-14 12:00:14 +0100690{
691 if (h2s->st != H2_SS_CLOSED)
692 h2s->h2c->nb_streams--;
693 h2s->st = H2_SS_CLOSED;
694}
695
Willy Tarreau71049cc2018-03-28 13:56:39 +0200696/* detaches an H2 stream from its H2C and releases it to the H2S pool. */
697static void h2s_destroy(struct h2s *h2s)
Willy Tarreau0a10de62018-03-01 16:27:53 +0100698{
699 h2s_close(h2s);
700 eb32_delete(&h2s->by_id);
Olivier Houchard638b7992018-08-16 15:41:52 +0200701 if (b_size(&h2s->rxbuf)) {
702 b_free(&h2s->rxbuf);
703 offer_buffers(NULL, tasks_run_queue);
704 }
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200705 if (h2s->send_wait != NULL)
706 h2s->send_wait->wait_reason &= ~SUB_CAN_SEND;
707 if (h2s->recv_wait != NULL)
708 h2s->recv_wait->wait_reason &= ~SUB_CAN_RECV;
Joseph Herlantd77575d2018-11-25 10:54:45 -0800709 /* There's no need to explicitly call unsubscribe here, the only
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200710 * reference left would be in the h2c send_list/fctl_list, and if
711 * we're in it, we're getting out anyway
712 */
713 LIST_DEL(&h2s->list);
714 LIST_INIT(&h2s->list);
715 tasklet_free(h2s->wait_event.task);
Willy Tarreau0a10de62018-03-01 16:27:53 +0100716 pool_free(pool_head_h2s, h2s);
717}
718
Willy Tarreaua8e49542018-10-03 18:53:55 +0200719/* allocates a new stream <id> for connection <h2c> and adds it into h2c's
720 * stream tree. In case of error, nothing is added and NULL is returned. The
721 * causes of errors can be any failed memory allocation. The caller is
722 * responsible for checking if the connection may support an extra stream
723 * prior to calling this function.
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200724 */
Willy Tarreaua8e49542018-10-03 18:53:55 +0200725static struct h2s *h2s_new(struct h2c *h2c, int id)
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200726{
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200727 struct h2s *h2s;
728
Willy Tarreaubafbe012017-11-24 17:34:44 +0100729 h2s = pool_alloc(pool_head_h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200730 if (!h2s)
731 goto out;
732
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200733 h2s->wait_event.task = tasklet_new();
734 if (!h2s->wait_event.task) {
735 pool_free(pool_head_h2s, h2s);
736 goto out;
737 }
738 h2s->send_wait = NULL;
739 h2s->recv_wait = NULL;
740 h2s->wait_event.task->process = h2_deferred_shut;
741 h2s->wait_event.task->context = h2s;
742 h2s->wait_event.handle = NULL;
743 h2s->wait_event.wait_reason = 0;
744 LIST_INIT(&h2s->list);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200745 h2s->h2c = h2c;
Willy Tarreaua8e49542018-10-03 18:53:55 +0200746 h2s->cs = NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200747 h2s->mws = h2c->miw;
748 h2s->flags = H2_SF_NONE;
749 h2s->errcode = H2_ERR_NO_ERROR;
750 h2s->st = H2_SS_IDLE;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +0200751 h2s->status = 0;
Olivier Houchard638b7992018-08-16 15:41:52 +0200752 h2s->rxbuf = BUF_NULL;
Willy Tarreau751f2d02018-10-05 09:35:00 +0200753
754 if (h2c->flags & H2_CF_IS_BACK) {
755 h1m_init_req(&h2s->h1m);
756 h2s->h1m.err_pos = -1; // don't care about errors on the request path
757 h2s->h1m.flags |= H1_MF_TOLOWER;
758 } else {
759 h1m_init_res(&h2s->h1m);
760 h2s->h1m.err_pos = -1; // don't care about errors on the response path
761 h2s->h1m.flags |= H1_MF_TOLOWER;
762 }
763
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200764 h2s->by_id.key = h2s->id = id;
Willy Tarreau751f2d02018-10-05 09:35:00 +0200765 if (id > 0)
766 h2c->max_id = id;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200767
768 eb32_insert(&h2c->streams_by_id, &h2s->by_id);
Willy Tarreau49745612017-12-03 18:56:02 +0100769 h2c->nb_streams++;
Willy Tarreaua8e49542018-10-03 18:53:55 +0200770
771 return h2s;
772
773 out_free_h2s:
774 pool_free(pool_head_h2s, h2s);
775 out:
776 return NULL;
777}
778
779/* creates a new stream <id> on the h2c connection and returns it, or NULL in
780 * case of memory allocation error.
781 */
782static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id)
783{
784 struct session *sess = h2c->conn->owner;
785 struct conn_stream *cs;
786 struct h2s *h2s;
787
788 if (h2c->nb_streams >= h2_settings_max_concurrent_streams)
789 goto out;
790
791 h2s = h2s_new(h2c, id);
792 if (!h2s)
793 goto out;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200794
795 cs = cs_new(h2c->conn);
796 if (!cs)
797 goto out_close;
798
Olivier Houchard746fb772018-12-15 19:42:00 +0100799 cs->flags |= CS_FL_NOT_FIRST;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200800 h2s->cs = cs;
801 cs->ctx = h2s;
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200802 h2c->nb_cs++;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200803
804 if (stream_create_from_cs(cs) < 0)
805 goto out_free_cs;
806
Willy Tarreau590a0512018-09-05 11:56:48 +0200807 /* We want the accept date presented to the next stream to be the one
808 * we have now, the handshake time to be null (since the next stream
809 * is not delayed by a handshake), and the idle time to count since
810 * right now.
811 */
812 sess->accept_date = date;
813 sess->tv_accept = now;
814 sess->t_handshake = 0;
815
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200816 /* OK done, the stream lives its own life now */
Willy Tarreauf2101912018-07-19 10:11:38 +0200817 if (h2_has_too_many_cs(h2c))
818 h2c->flags |= H2_CF_DEM_TOOMANY;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200819 return h2s;
820
821 out_free_cs:
Willy Tarreau7ac60e82018-07-19 09:04:05 +0200822 h2c->nb_cs--;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200823 cs_free(cs);
824 out_close:
Willy Tarreau71049cc2018-03-28 13:56:39 +0200825 h2s_destroy(h2s);
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200826 out:
Willy Tarreau45efc072018-10-03 18:27:52 +0200827 sess_log(sess);
828 return NULL;
Willy Tarreau3ccf4b22017-10-13 19:07:26 +0200829}
830
Willy Tarreau751f2d02018-10-05 09:35:00 +0200831/* allocates a new stream associated to conn_stream <cs> on the h2c connection
832 * and returns it, or NULL in case of memory allocation error or if the highest
833 * possible stream ID was reached.
834 */
Olivier Houchardf502aca2018-12-14 19:42:40 +0100835static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct conn_stream *cs, struct session *sess)
Willy Tarreau751f2d02018-10-05 09:35:00 +0200836{
837 struct h2s *h2s = NULL;
838
839 if (h2c->nb_streams >= h2_settings_max_concurrent_streams)
840 goto out;
841
842 /* Defer choosing the ID until we send the first message to create the stream */
843 h2s = h2s_new(h2c, 0);
844 if (!h2s)
845 goto out;
846
847 h2s->cs = cs;
Olivier Houchardf502aca2018-12-14 19:42:40 +0100848 h2s->sess = sess;
Willy Tarreau751f2d02018-10-05 09:35:00 +0200849 cs->ctx = h2s;
850 h2c->nb_cs++;
851
Willy Tarreau751f2d02018-10-05 09:35:00 +0200852 out:
853 return h2s;
854}
855
Willy Tarreaube5b7152017-09-25 16:25:39 +0200856/* try to send a settings frame on the connection. Returns > 0 on success, 0 if
857 * it couldn't do anything. It may return an error in h2c. See RFC7540#11.3 for
858 * the various settings codes.
859 */
Willy Tarreau7f0cc492018-10-08 07:13:08 +0200860static int h2c_send_settings(struct h2c *h2c)
Willy Tarreaube5b7152017-09-25 16:25:39 +0200861{
862 struct buffer *res;
863 char buf_data[100]; // enough for 15 settings
Willy Tarreau83061a82018-07-13 11:56:34 +0200864 struct buffer buf;
Willy Tarreaube5b7152017-09-25 16:25:39 +0200865 int ret;
866
867 if (h2c_mux_busy(h2c, NULL)) {
868 h2c->flags |= H2_CF_DEM_MBUSY;
869 return 0;
870 }
871
Willy Tarreau44e973f2018-03-01 17:49:30 +0100872 res = h2_get_buf(h2c, &h2c->mbuf);
Willy Tarreaube5b7152017-09-25 16:25:39 +0200873 if (!res) {
874 h2c->flags |= H2_CF_MUX_MALLOC;
875 h2c->flags |= H2_CF_DEM_MROOM;
876 return 0;
877 }
878
879 chunk_init(&buf, buf_data, sizeof(buf_data));
880 chunk_memcpy(&buf,
881 "\x00\x00\x00" /* length : 0 for now */
882 "\x04\x00" /* type : 4 (settings), flags : 0 */
883 "\x00\x00\x00\x00", /* stream ID : 0 */
884 9);
885
886 if (h2_settings_header_table_size != 4096) {
887 char str[6] = "\x00\x01"; /* header_table_size */
888
889 write_n32(str + 2, h2_settings_header_table_size);
890 chunk_memcat(&buf, str, 6);
891 }
892
893 if (h2_settings_initial_window_size != 65535) {
894 char str[6] = "\x00\x04"; /* initial_window_size */
895
896 write_n32(str + 2, h2_settings_initial_window_size);
897 chunk_memcat(&buf, str, 6);
898 }
899
900 if (h2_settings_max_concurrent_streams != 0) {
901 char str[6] = "\x00\x03"; /* max_concurrent_streams */
902
903 /* Note: 0 means "unlimited" for haproxy's config but not for
904 * the protocol, so never send this value!
905 */
906 write_n32(str + 2, h2_settings_max_concurrent_streams);
907 chunk_memcat(&buf, str, 6);
908 }
909
910 if (global.tune.bufsize != 16384) {
911 char str[6] = "\x00\x05"; /* max_frame_size */
912
913 /* note: similarly we could also emit MAX_HEADER_LIST_SIZE to
914 * match bufsize - rewrite size, but at the moment it seems
915 * that clients don't take care of it.
916 */
917 write_n32(str + 2, global.tune.bufsize);
918 chunk_memcat(&buf, str, 6);
919 }
920
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200921 h2_set_frame_size(buf.area, buf.data - 9);
922 ret = b_istput(res, ist2(buf.area, buf.data));
Willy Tarreaube5b7152017-09-25 16:25:39 +0200923 if (unlikely(ret <= 0)) {
924 if (!ret) {
925 h2c->flags |= H2_CF_MUX_MFULL;
926 h2c->flags |= H2_CF_DEM_MROOM;
927 return 0;
928 }
929 else {
930 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
931 return 0;
932 }
933 }
934 return ret;
935}
936
Willy Tarreau52eed752017-09-22 15:05:09 +0200937/* Try to receive a connection preface, then upon success try to send our
938 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
939 * missing data. It may return an error in h2c.
940 */
941static int h2c_frt_recv_preface(struct h2c *h2c)
942{
943 int ret1;
Willy Tarreaube5b7152017-09-25 16:25:39 +0200944 int ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +0200945
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200946 ret1 = b_isteq(&h2c->dbuf, 0, b_data(&h2c->dbuf), ist(H2_CONN_PREFACE));
Willy Tarreau52eed752017-09-22 15:05:09 +0200947
948 if (unlikely(ret1 <= 0)) {
Willy Tarreau22de8d32018-09-05 19:55:58 +0200949 if (ret1 < 0)
950 sess_log(h2c->conn->owner);
951
Willy Tarreau52eed752017-09-22 15:05:09 +0200952 if (ret1 < 0 || conn_xprt_read0_pending(h2c->conn))
953 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
954 return 0;
955 }
956
Willy Tarreau7f0cc492018-10-08 07:13:08 +0200957 ret2 = h2c_send_settings(h2c);
Willy Tarreaube5b7152017-09-25 16:25:39 +0200958 if (ret2 > 0)
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200959 b_del(&h2c->dbuf, ret1);
Willy Tarreau52eed752017-09-22 15:05:09 +0200960
Willy Tarreaube5b7152017-09-25 16:25:39 +0200961 return ret2;
Willy Tarreau52eed752017-09-22 15:05:09 +0200962}
963
Willy Tarreau01b44822018-10-03 14:26:37 +0200964/* Try to send a connection preface, then upon success try to send our
965 * preface which is a SETTINGS frame. Returns > 0 on success or zero on
966 * missing data. It may return an error in h2c.
967 */
968static int h2c_bck_send_preface(struct h2c *h2c)
969{
970 struct buffer *res;
971
972 if (h2c_mux_busy(h2c, NULL)) {
973 h2c->flags |= H2_CF_DEM_MBUSY;
974 return 0;
975 }
976
977 res = h2_get_buf(h2c, &h2c->mbuf);
978 if (!res) {
979 h2c->flags |= H2_CF_MUX_MALLOC;
980 h2c->flags |= H2_CF_DEM_MROOM;
981 return 0;
982 }
983
984 if (!b_data(res)) {
985 /* preface not yet sent */
986 b_istput(res, ist(H2_CONN_PREFACE));
987 }
988
989 return h2c_send_settings(h2c);
990}
991
Willy Tarreau081d4722017-05-16 21:51:05 +0200992/* try to send a GOAWAY frame on the connection to report an error or a graceful
993 * shutdown, with h2c->errcode as the error code. Returns > 0 on success or zero
994 * if nothing was done. It uses h2c->last_sid as the advertised ID, or copies it
995 * from h2c->max_id if it's not set yet (<0). In case of lack of room to write
996 * the message, it subscribes the requester (either <h2s> or <h2c>) to future
997 * notifications. It sets H2_CF_GOAWAY_SENT on success, and H2_CF_GOAWAY_FAILED
998 * on unrecoverable failure. It will not attempt to send one again in this last
999 * case so that it is safe to use h2c_error() to report such errors.
1000 */
1001static int h2c_send_goaway_error(struct h2c *h2c, struct h2s *h2s)
1002{
1003 struct buffer *res;
1004 char str[17];
1005 int ret;
1006
1007 if (h2c->flags & H2_CF_GOAWAY_FAILED)
1008 return 1; // claim that it worked
1009
1010 if (h2c_mux_busy(h2c, h2s)) {
1011 if (h2s)
1012 h2s->flags |= H2_SF_BLK_MBUSY;
1013 else
1014 h2c->flags |= H2_CF_DEM_MBUSY;
1015 return 0;
1016 }
1017
Willy Tarreau44e973f2018-03-01 17:49:30 +01001018 res = h2_get_buf(h2c, &h2c->mbuf);
Willy Tarreau081d4722017-05-16 21:51:05 +02001019 if (!res) {
1020 h2c->flags |= H2_CF_MUX_MALLOC;
1021 if (h2s)
1022 h2s->flags |= H2_SF_BLK_MROOM;
1023 else
1024 h2c->flags |= H2_CF_DEM_MROOM;
1025 return 0;
1026 }
1027
1028 /* len: 8, type: 7, flags: none, sid: 0 */
1029 memcpy(str, "\x00\x00\x08\x07\x00\x00\x00\x00\x00", 9);
1030
1031 if (h2c->last_sid < 0)
1032 h2c->last_sid = h2c->max_id;
1033
1034 write_n32(str + 9, h2c->last_sid);
1035 write_n32(str + 13, h2c->errcode);
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001036 ret = b_istput(res, ist2(str, 17));
Willy Tarreau081d4722017-05-16 21:51:05 +02001037 if (unlikely(ret <= 0)) {
1038 if (!ret) {
1039 h2c->flags |= H2_CF_MUX_MFULL;
1040 if (h2s)
1041 h2s->flags |= H2_SF_BLK_MROOM;
1042 else
1043 h2c->flags |= H2_CF_DEM_MROOM;
1044 return 0;
1045 }
1046 else {
1047 /* we cannot report this error using GOAWAY, so we mark
1048 * it and claim a success.
1049 */
1050 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1051 h2c->flags |= H2_CF_GOAWAY_FAILED;
1052 return 1;
1053 }
1054 }
1055 h2c->flags |= H2_CF_GOAWAY_SENT;
1056 return ret;
1057}
1058
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001059/* Try to send an RST_STREAM frame on the connection for the indicated stream
1060 * during mux operations. This stream must be valid and cannot be closed
1061 * already. h2s->id will be used for the stream ID and h2s->errcode will be
1062 * used for the error code. h2s->st will be update to H2_SS_CLOSED if it was
1063 * not yet.
1064 *
1065 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1066 * to write the message, it subscribes the stream to future notifications.
1067 */
1068static int h2s_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1069{
1070 struct buffer *res;
1071 char str[13];
1072 int ret;
1073
1074 if (!h2s || h2s->st == H2_SS_CLOSED)
1075 return 1;
1076
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001077 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1078 * RST_STREAM in response to a RST_STREAM frame.
1079 */
1080 if (h2c->dft == H2_FT_RST_STREAM) {
1081 ret = 1;
1082 goto ignore;
1083 }
1084
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001085 if (h2c_mux_busy(h2c, h2s)) {
1086 h2s->flags |= H2_SF_BLK_MBUSY;
1087 return 0;
1088 }
1089
Willy Tarreau44e973f2018-03-01 17:49:30 +01001090 res = h2_get_buf(h2c, &h2c->mbuf);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001091 if (!res) {
1092 h2c->flags |= H2_CF_MUX_MALLOC;
1093 h2s->flags |= H2_SF_BLK_MROOM;
1094 return 0;
1095 }
1096
1097 /* len: 4, type: 3, flags: none */
1098 memcpy(str, "\x00\x00\x04\x03\x00", 5);
1099 write_n32(str + 5, h2s->id);
1100 write_n32(str + 9, h2s->errcode);
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001101 ret = b_istput(res, ist2(str, 13));
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001102
1103 if (unlikely(ret <= 0)) {
1104 if (!ret) {
1105 h2c->flags |= H2_CF_MUX_MFULL;
1106 h2s->flags |= H2_SF_BLK_MROOM;
1107 return 0;
1108 }
1109 else {
1110 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1111 return 0;
1112 }
1113 }
1114
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001115 ignore:
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001116 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001117 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001118 return ret;
1119}
1120
1121/* Try to send an RST_STREAM frame on the connection for the stream being
1122 * demuxed using h2c->dsi for the stream ID. It will use h2s->errcode as the
1123 * error code unless the stream's state already is IDLE or CLOSED in which
1124 * case STREAM_CLOSED will be used, and will update h2s->st to H2_SS_CLOSED if
1125 * it was not yet.
1126 *
1127 * Returns > 0 on success or zero if nothing was done. In case of lack of room
1128 * to write the message, it blocks the demuxer and subscribes it to future
Joseph Herlantd77575d2018-11-25 10:54:45 -08001129 * notifications. It's worth mentioning that an RST may even be sent for a
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001130 * closed stream.
Willy Tarreau27a84c92017-10-17 08:10:17 +02001131 */
1132static int h2c_send_rst_stream(struct h2c *h2c, struct h2s *h2s)
1133{
1134 struct buffer *res;
1135 char str[13];
1136 int ret;
1137
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001138 /* RFC7540#5.4.2: To avoid looping, an endpoint MUST NOT send a
1139 * RST_STREAM in response to a RST_STREAM frame.
1140 */
1141 if (h2c->dft == H2_FT_RST_STREAM) {
1142 ret = 1;
1143 goto ignore;
1144 }
1145
Willy Tarreau27a84c92017-10-17 08:10:17 +02001146 if (h2c_mux_busy(h2c, h2s)) {
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001147 h2c->flags |= H2_CF_DEM_MBUSY;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001148 return 0;
1149 }
1150
Willy Tarreau44e973f2018-03-01 17:49:30 +01001151 res = h2_get_buf(h2c, &h2c->mbuf);
Willy Tarreau27a84c92017-10-17 08:10:17 +02001152 if (!res) {
1153 h2c->flags |= H2_CF_MUX_MALLOC;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001154 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001155 return 0;
1156 }
1157
1158 /* len: 4, type: 3, flags: none */
1159 memcpy(str, "\x00\x00\x04\x03\x00", 5);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001160
Willy Tarreau27a84c92017-10-17 08:10:17 +02001161 write_n32(str + 5, h2c->dsi);
Willy Tarreauab0e1da2018-10-05 10:16:37 +02001162 write_n32(str + 9, h2s->id ? h2s->errcode : H2_ERR_STREAM_CLOSED);
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001163 ret = b_istput(res, ist2(str, 13));
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001164
Willy Tarreau27a84c92017-10-17 08:10:17 +02001165 if (unlikely(ret <= 0)) {
1166 if (!ret) {
1167 h2c->flags |= H2_CF_MUX_MFULL;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001168 h2c->flags |= H2_CF_DEM_MROOM;
Willy Tarreau27a84c92017-10-17 08:10:17 +02001169 return 0;
1170 }
1171 else {
1172 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1173 return 0;
1174 }
1175 }
1176
Willy Tarreau8adae7c2018-03-22 17:37:05 +01001177 ignore:
Willy Tarreauab0e1da2018-10-05 10:16:37 +02001178 if (h2s->id) {
Willy Tarreau27a84c92017-10-17 08:10:17 +02001179 h2s->flags |= H2_SF_RST_SENT;
Willy Tarreau00dd0782018-03-01 16:31:34 +01001180 h2s_close(h2s);
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01001181 }
1182
Willy Tarreau27a84c92017-10-17 08:10:17 +02001183 return ret;
1184}
1185
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001186/* try to send an empty DATA frame with the ES flag set to notify about the
1187 * end of stream and match a shutdown(write). If an ES was already sent as
1188 * indicated by HLOC/ERROR/RESET/CLOSED states, nothing is done. Returns > 0
1189 * on success or zero if nothing was done. In case of lack of room to write the
1190 * message, it subscribes the requesting stream to future notifications.
1191 */
1192static int h2_send_empty_data_es(struct h2s *h2s)
1193{
1194 struct h2c *h2c = h2s->h2c;
1195 struct buffer *res;
1196 char str[9];
1197 int ret;
1198
Willy Tarreau721c9742017-11-07 11:05:42 +01001199 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED)
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001200 return 1;
1201
1202 if (h2c_mux_busy(h2c, h2s)) {
1203 h2s->flags |= H2_SF_BLK_MBUSY;
1204 return 0;
1205 }
1206
Willy Tarreau44e973f2018-03-01 17:49:30 +01001207 res = h2_get_buf(h2c, &h2c->mbuf);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001208 if (!res) {
1209 h2c->flags |= H2_CF_MUX_MALLOC;
1210 h2s->flags |= H2_SF_BLK_MROOM;
1211 return 0;
1212 }
1213
1214 /* len: 0x000000, type: 0(DATA), flags: ES=1 */
1215 memcpy(str, "\x00\x00\x00\x00\x01", 5);
1216 write_n32(str + 5, h2s->id);
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001217 ret = b_istput(res, ist2(str, 9));
Willy Tarreau6d8b6822017-11-07 14:39:09 +01001218 if (likely(ret > 0)) {
1219 h2s->flags |= H2_SF_ES_SENT;
1220 }
1221 else if (!ret) {
1222 h2c->flags |= H2_CF_MUX_MFULL;
1223 h2s->flags |= H2_SF_BLK_MROOM;
1224 return 0;
1225 }
1226 else {
1227 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1228 return 0;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01001229 }
1230 return ret;
1231}
1232
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001233/* wake the streams attached to the connection, whose id is greater than <last>,
1234 * and assign their conn_stream the CS_FL_* flags <flags> in addition to
Willy Tarreau2c096c32018-09-12 09:45:54 +02001235 * CS_FL_ERROR in case of error and CS_FL_REOS in case of closed connection.
1236 * The stream's state is automatically updated accordingly.
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001237 */
1238static void h2_wake_some_streams(struct h2c *h2c, int last, uint32_t flags)
1239{
1240 struct eb32_node *node;
1241 struct h2s *h2s;
1242
1243 if (h2c->st0 >= H2_CS_ERROR || h2c->conn->flags & CO_FL_ERROR)
Willy Tarreaua8519352018-12-18 16:44:28 +01001244 flags |= CS_FL_ERR_PENDING;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001245
1246 if (conn_xprt_read0_pending(h2c->conn))
Willy Tarreau2c096c32018-09-12 09:45:54 +02001247 flags |= CS_FL_REOS;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001248
1249 node = eb32_lookup_ge(&h2c->streams_by_id, last + 1);
1250 while (node) {
1251 h2s = container_of(node, struct h2s, by_id);
1252 if (h2s->id <= last)
1253 break;
1254 node = eb32_next(node);
Willy Tarreau22cf59b2017-11-10 11:42:33 +01001255
1256 if (!h2s->cs) {
1257 /* this stream was already orphaned */
Willy Tarreau71049cc2018-03-28 13:56:39 +02001258 h2s_destroy(h2s);
Willy Tarreau22cf59b2017-11-10 11:42:33 +01001259 continue;
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001260 }
Willy Tarreau22cf59b2017-11-10 11:42:33 +01001261
1262 h2s->cs->flags |= flags;
Willy Tarreaua8519352018-12-18 16:44:28 +01001263 if ((flags & CS_FL_ERR_PENDING) && (h2s->cs->flags & CS_FL_EOS))
1264 h2s->cs->flags |= CS_FL_ERROR;
1265
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001266 if (h2s->recv_wait) {
1267 struct wait_event *sw = h2s->recv_wait;
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001268 sw->wait_reason &= ~SUB_CAN_RECV;
1269 tasklet_wakeup(sw->task);
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001270 h2s->recv_wait = NULL;
Olivier Houchard21df6cc2018-09-14 23:21:44 +02001271 } else if (h2s->cs->data_cb->wake != NULL)
1272 h2s->cs->data_cb->wake(h2s->cs);
Willy Tarreau22cf59b2017-11-10 11:42:33 +01001273
Willy Tarreaua8519352018-12-18 16:44:28 +01001274 if (flags & CS_FL_ERR_PENDING && h2s->st < H2_SS_ERROR)
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001275 h2s->st = H2_SS_ERROR;
Willy Tarreau2c096c32018-09-12 09:45:54 +02001276 else if (flags & CS_FL_REOS && h2s->st == H2_SS_OPEN)
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001277 h2s->st = H2_SS_HREM;
Willy Tarreau2c096c32018-09-12 09:45:54 +02001278 else if (flags & CS_FL_REOS && h2s->st == H2_SS_HLOC)
Willy Tarreau00dd0782018-03-01 16:31:34 +01001279 h2s_close(h2s);
Willy Tarreau23b92aa2017-10-30 00:26:54 +01001280 }
1281}
1282
Willy Tarreau3421aba2017-07-27 15:41:03 +02001283/* Increase all streams' outgoing window size by the difference passed in
1284 * argument. This is needed upon receipt of the settings frame if the initial
1285 * window size is different. The difference may be negative and the resulting
1286 * window size as well, for the time it takes to receive some window updates.
1287 */
1288static void h2c_update_all_ws(struct h2c *h2c, int diff)
1289{
1290 struct h2s *h2s;
1291 struct eb32_node *node;
1292
1293 if (!diff)
1294 return;
1295
1296 node = eb32_first(&h2c->streams_by_id);
1297 while (node) {
1298 h2s = container_of(node, struct h2s, by_id);
1299 h2s->mws += diff;
1300 node = eb32_next(node);
1301 }
1302}
1303
1304/* processes a SETTINGS frame whose payload is <payload> for <plen> bytes, and
1305 * ACKs it if needed. Returns > 0 on success or zero on missing data. It may
1306 * return an error in h2c. Described in RFC7540#6.5.
1307 */
1308static int h2c_handle_settings(struct h2c *h2c)
1309{
1310 unsigned int offset;
1311 int error;
1312
1313 if (h2c->dff & H2_F_SETTINGS_ACK) {
1314 if (h2c->dfl) {
1315 error = H2_ERR_FRAME_SIZE_ERROR;
1316 goto fail;
1317 }
1318 return 1;
1319 }
1320
1321 if (h2c->dsi != 0) {
1322 error = H2_ERR_PROTOCOL_ERROR;
1323 goto fail;
1324 }
1325
1326 if (h2c->dfl % 6) {
1327 error = H2_ERR_FRAME_SIZE_ERROR;
1328 goto fail;
1329 }
1330
1331 /* that's the limit we can process */
1332 if (h2c->dfl > global.tune.bufsize) {
1333 error = H2_ERR_FRAME_SIZE_ERROR;
1334 goto fail;
1335 }
1336
1337 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001338 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau3421aba2017-07-27 15:41:03 +02001339 return 0;
1340
1341 /* parse the frame */
1342 for (offset = 0; offset < h2c->dfl; offset += 6) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001343 uint16_t type = h2_get_n16(&h2c->dbuf, offset);
1344 int32_t arg = h2_get_n32(&h2c->dbuf, offset + 2);
Willy Tarreau3421aba2017-07-27 15:41:03 +02001345
1346 switch (type) {
1347 case H2_SETTINGS_INITIAL_WINDOW_SIZE:
1348 /* we need to update all existing streams with the
1349 * difference from the previous iws.
1350 */
1351 if (arg < 0) { // RFC7540#6.5.2
1352 error = H2_ERR_FLOW_CONTROL_ERROR;
1353 goto fail;
1354 }
1355 h2c_update_all_ws(h2c, arg - h2c->miw);
1356 h2c->miw = arg;
1357 break;
1358 case H2_SETTINGS_MAX_FRAME_SIZE:
1359 if (arg < 16384 || arg > 16777215) { // RFC7540#6.5.2
1360 error = H2_ERR_PROTOCOL_ERROR;
1361 goto fail;
1362 }
1363 h2c->mfs = arg;
1364 break;
Willy Tarreau1b38b462017-12-03 19:02:28 +01001365 case H2_SETTINGS_ENABLE_PUSH:
1366 if (arg < 0 || arg > 1) { // RFC7540#6.5.2
1367 error = H2_ERR_PROTOCOL_ERROR;
1368 goto fail;
1369 }
1370 break;
Willy Tarreau3421aba2017-07-27 15:41:03 +02001371 }
1372 }
1373
1374 /* need to ACK this frame now */
1375 h2c->st0 = H2_CS_FRAME_A;
1376 return 1;
1377 fail:
Willy Tarreau22de8d32018-09-05 19:55:58 +02001378 sess_log(h2c->conn->owner);
Willy Tarreau3421aba2017-07-27 15:41:03 +02001379 h2c_error(h2c, error);
1380 return 0;
1381}
1382
1383/* try to send an ACK for a settings frame on the connection. Returns > 0 on
1384 * success or one of the h2_status values.
1385 */
1386static int h2c_ack_settings(struct h2c *h2c)
1387{
1388 struct buffer *res;
1389 char str[9];
1390 int ret = -1;
1391
1392 if (h2c_mux_busy(h2c, NULL)) {
1393 h2c->flags |= H2_CF_DEM_MBUSY;
1394 return 0;
1395 }
1396
Willy Tarreau44e973f2018-03-01 17:49:30 +01001397 res = h2_get_buf(h2c, &h2c->mbuf);
Willy Tarreau3421aba2017-07-27 15:41:03 +02001398 if (!res) {
1399 h2c->flags |= H2_CF_MUX_MALLOC;
1400 h2c->flags |= H2_CF_DEM_MROOM;
1401 return 0;
1402 }
1403
1404 memcpy(str,
1405 "\x00\x00\x00" /* length : 0 (no data) */
1406 "\x04" "\x01" /* type : 4, flags : ACK */
1407 "\x00\x00\x00\x00" /* stream ID */, 9);
1408
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001409 ret = b_istput(res, ist2(str, 9));
Willy Tarreau3421aba2017-07-27 15:41:03 +02001410 if (unlikely(ret <= 0)) {
1411 if (!ret) {
1412 h2c->flags |= H2_CF_MUX_MFULL;
1413 h2c->flags |= H2_CF_DEM_MROOM;
1414 return 0;
1415 }
1416 else {
1417 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1418 return 0;
1419 }
1420 }
1421 return ret;
1422}
1423
Willy Tarreaucf68c782017-10-10 17:11:41 +02001424/* processes a PING frame and schedules an ACK if needed. The caller must pass
1425 * the pointer to the payload in <payload>. Returns > 0 on success or zero on
1426 * missing data. It may return an error in h2c.
1427 */
1428static int h2c_handle_ping(struct h2c *h2c)
1429{
1430 /* frame length must be exactly 8 */
1431 if (h2c->dfl != 8) {
1432 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
1433 return 0;
1434 }
1435
1436 /* schedule a response */
Willy Tarreau68ed6412017-12-03 18:15:56 +01001437 if (!(h2c->dff & H2_F_PING_ACK))
Willy Tarreaucf68c782017-10-10 17:11:41 +02001438 h2c->st0 = H2_CS_FRAME_A;
1439 return 1;
1440}
1441
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02001442/* Try to send a window update for stream id <sid> and value <increment>.
1443 * Returns > 0 on success or zero on missing room or failure. It may return an
1444 * error in h2c.
1445 */
1446static int h2c_send_window_update(struct h2c *h2c, int sid, uint32_t increment)
1447{
1448 struct buffer *res;
1449 char str[13];
1450 int ret = -1;
1451
1452 if (h2c_mux_busy(h2c, NULL)) {
1453 h2c->flags |= H2_CF_DEM_MBUSY;
1454 return 0;
1455 }
1456
Willy Tarreau44e973f2018-03-01 17:49:30 +01001457 res = h2_get_buf(h2c, &h2c->mbuf);
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02001458 if (!res) {
1459 h2c->flags |= H2_CF_MUX_MALLOC;
1460 h2c->flags |= H2_CF_DEM_MROOM;
1461 return 0;
1462 }
1463
1464 /* length: 4, type: 8, flags: none */
1465 memcpy(str, "\x00\x00\x04\x08\x00", 5);
1466 write_n32(str + 5, sid);
1467 write_n32(str + 9, increment);
1468
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001469 ret = b_istput(res, ist2(str, 13));
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02001470
1471 if (unlikely(ret <= 0)) {
1472 if (!ret) {
1473 h2c->flags |= H2_CF_MUX_MFULL;
1474 h2c->flags |= H2_CF_DEM_MROOM;
1475 return 0;
1476 }
1477 else {
1478 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1479 return 0;
1480 }
1481 }
1482 return ret;
1483}
1484
1485/* try to send pending window update for the connection. It's safe to call it
1486 * with no pending updates. Returns > 0 on success or zero on missing room or
1487 * failure. It may return an error in h2c.
1488 */
1489static int h2c_send_conn_wu(struct h2c *h2c)
1490{
1491 int ret = 1;
1492
1493 if (h2c->rcvd_c <= 0)
1494 return 1;
1495
1496 /* send WU for the connection */
1497 ret = h2c_send_window_update(h2c, 0, h2c->rcvd_c);
1498 if (ret > 0)
1499 h2c->rcvd_c = 0;
1500
1501 return ret;
1502}
1503
1504/* try to send pending window update for the current dmux stream. It's safe to
1505 * call it with no pending updates. Returns > 0 on success or zero on missing
1506 * room or failure. It may return an error in h2c.
1507 */
1508static int h2c_send_strm_wu(struct h2c *h2c)
1509{
1510 int ret = 1;
1511
1512 if (h2c->rcvd_s <= 0)
1513 return 1;
1514
1515 /* send WU for the stream */
1516 ret = h2c_send_window_update(h2c, h2c->dsi, h2c->rcvd_s);
1517 if (ret > 0)
1518 h2c->rcvd_s = 0;
1519
1520 return ret;
1521}
1522
Willy Tarreaucf68c782017-10-10 17:11:41 +02001523/* try to send an ACK for a ping frame on the connection. Returns > 0 on
1524 * success, 0 on missing data or one of the h2_status values.
1525 */
1526static int h2c_ack_ping(struct h2c *h2c)
1527{
1528 struct buffer *res;
1529 char str[17];
1530 int ret = -1;
1531
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001532 if (b_data(&h2c->dbuf) < 8)
Willy Tarreaucf68c782017-10-10 17:11:41 +02001533 return 0;
1534
1535 if (h2c_mux_busy(h2c, NULL)) {
1536 h2c->flags |= H2_CF_DEM_MBUSY;
1537 return 0;
1538 }
1539
Willy Tarreau44e973f2018-03-01 17:49:30 +01001540 res = h2_get_buf(h2c, &h2c->mbuf);
Willy Tarreaucf68c782017-10-10 17:11:41 +02001541 if (!res) {
1542 h2c->flags |= H2_CF_MUX_MALLOC;
1543 h2c->flags |= H2_CF_DEM_MROOM;
1544 return 0;
1545 }
1546
1547 memcpy(str,
1548 "\x00\x00\x08" /* length : 8 (same payload) */
1549 "\x06" "\x01" /* type : 6, flags : ACK */
1550 "\x00\x00\x00\x00" /* stream ID */, 9);
1551
1552 /* copy the original payload */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001553 h2_get_buf_bytes(str + 9, 8, &h2c->dbuf, 0);
Willy Tarreaucf68c782017-10-10 17:11:41 +02001554
Willy Tarreauea1b06d2018-07-12 09:02:47 +02001555 ret = b_istput(res, ist2(str, 17));
Willy Tarreaucf68c782017-10-10 17:11:41 +02001556 if (unlikely(ret <= 0)) {
1557 if (!ret) {
1558 h2c->flags |= H2_CF_MUX_MFULL;
1559 h2c->flags |= H2_CF_DEM_MROOM;
1560 return 0;
1561 }
1562 else {
1563 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
1564 return 0;
1565 }
1566 }
1567 return ret;
1568}
1569
Willy Tarreau26f95952017-07-27 17:18:30 +02001570/* processes a WINDOW_UPDATE frame whose payload is <payload> for <plen> bytes.
1571 * Returns > 0 on success or zero on missing data. It may return an error in
1572 * h2c or h2s. Described in RFC7540#6.9.
1573 */
1574static int h2c_handle_window_update(struct h2c *h2c, struct h2s *h2s)
1575{
1576 int32_t inc;
1577 int error;
1578
1579 if (h2c->dfl != 4) {
1580 error = H2_ERR_FRAME_SIZE_ERROR;
1581 goto conn_err;
1582 }
1583
1584 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001585 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau26f95952017-07-27 17:18:30 +02001586 return 0;
1587
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001588 inc = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau26f95952017-07-27 17:18:30 +02001589
1590 if (h2c->dsi != 0) {
1591 /* stream window update */
Willy Tarreau26f95952017-07-27 17:18:30 +02001592
1593 /* it's not an error to receive WU on a closed stream */
1594 if (h2s->st == H2_SS_CLOSED)
1595 return 1;
1596
1597 if (!inc) {
1598 error = H2_ERR_PROTOCOL_ERROR;
1599 goto strm_err;
1600 }
1601
1602 if (h2s->mws >= 0 && h2s->mws + inc < 0) {
1603 error = H2_ERR_FLOW_CONTROL_ERROR;
1604 goto strm_err;
1605 }
1606
1607 h2s->mws += inc;
1608 if (h2s->mws > 0 && (h2s->flags & H2_SF_BLK_SFCTL)) {
1609 h2s->flags &= ~H2_SF_BLK_SFCTL;
Olivier Houcharddddfe312018-10-10 18:51:00 +02001610 if (h2s->send_wait)
1611 LIST_ADDQ(&h2c->send_list, &h2s->list);
1612
Willy Tarreau26f95952017-07-27 17:18:30 +02001613 }
1614 }
1615 else {
1616 /* connection window update */
1617 if (!inc) {
1618 error = H2_ERR_PROTOCOL_ERROR;
1619 goto conn_err;
1620 }
1621
1622 if (h2c->mws >= 0 && h2c->mws + inc < 0) {
1623 error = H2_ERR_FLOW_CONTROL_ERROR;
1624 goto conn_err;
1625 }
1626
1627 h2c->mws += inc;
1628 }
1629
1630 return 1;
1631
1632 conn_err:
1633 h2c_error(h2c, error);
1634 return 0;
1635
1636 strm_err:
1637 if (h2s) {
1638 h2s_error(h2s, error);
Willy Tarreaua20a5192017-12-27 11:02:06 +01001639 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau26f95952017-07-27 17:18:30 +02001640 }
1641 else
1642 h2c_error(h2c, error);
1643 return 0;
1644}
1645
Willy Tarreaue96b0922017-10-30 00:28:29 +01001646/* processes a GOAWAY frame, and signals all streams whose ID is greater than
1647 * the last ID. Returns > 0 on success or zero on missing data. It may return
1648 * an error in h2c. Described in RFC7540#6.8.
1649 */
1650static int h2c_handle_goaway(struct h2c *h2c)
1651{
1652 int error;
1653 int last;
1654
1655 if (h2c->dsi != 0) {
1656 error = H2_ERR_PROTOCOL_ERROR;
1657 goto conn_err;
1658 }
1659
1660 if (h2c->dfl < 8) {
1661 error = H2_ERR_FRAME_SIZE_ERROR;
1662 goto conn_err;
1663 }
1664
1665 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001666 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreaue96b0922017-10-30 00:28:29 +01001667 return 0;
1668
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001669 last = h2_get_n32(&h2c->dbuf, 0);
1670 h2c->errcode = h2_get_n32(&h2c->dbuf, 4);
Willy Tarreaue96b0922017-10-30 00:28:29 +01001671 h2_wake_some_streams(h2c, last, CS_FL_ERROR);
Willy Tarreau11cc2d62017-12-03 10:27:47 +01001672 if (h2c->last_sid < 0)
1673 h2c->last_sid = last;
Willy Tarreaue96b0922017-10-30 00:28:29 +01001674 return 1;
1675
1676 conn_err:
1677 h2c_error(h2c, error);
1678 return 0;
1679}
1680
Willy Tarreau92153fc2017-12-03 19:46:19 +01001681/* processes a PRIORITY frame, and either skips it or rejects if it is
1682 * invalid. Returns > 0 on success or zero on missing data. It may return
1683 * an error in h2c. Described in RFC7540#6.3.
1684 */
1685static int h2c_handle_priority(struct h2c *h2c)
1686{
1687 int error;
1688
1689 if (h2c->dsi == 0) {
1690 error = H2_ERR_PROTOCOL_ERROR;
1691 goto conn_err;
1692 }
1693
1694 if (h2c->dfl != 5) {
1695 error = H2_ERR_FRAME_SIZE_ERROR;
1696 goto conn_err;
1697 }
1698
1699 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001700 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreau92153fc2017-12-03 19:46:19 +01001701 return 0;
1702
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001703 if (h2_get_n32(&h2c->dbuf, 0) == h2c->dsi) {
Willy Tarreau92153fc2017-12-03 19:46:19 +01001704 /* 7540#5.3 : can't depend on itself */
1705 error = H2_ERR_PROTOCOL_ERROR;
1706 goto conn_err;
1707 }
1708 return 1;
1709
1710 conn_err:
1711 h2c_error(h2c, error);
1712 return 0;
1713}
1714
Willy Tarreaucd234e92017-08-18 10:59:39 +02001715/* processes an RST_STREAM frame, and sets the 32-bit error code on the stream.
1716 * Returns > 0 on success or zero on missing data. It may return an error in
1717 * h2c. Described in RFC7540#6.4.
1718 */
1719static int h2c_handle_rst_stream(struct h2c *h2c, struct h2s *h2s)
1720{
1721 int error;
1722
1723 if (h2c->dsi == 0) {
1724 error = H2_ERR_PROTOCOL_ERROR;
1725 goto conn_err;
1726 }
1727
Willy Tarreaucd234e92017-08-18 10:59:39 +02001728 if (h2c->dfl != 4) {
1729 error = H2_ERR_FRAME_SIZE_ERROR;
1730 goto conn_err;
1731 }
1732
1733 /* process full frame only */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001734 if (b_data(&h2c->dbuf) < h2c->dfl)
Willy Tarreaucd234e92017-08-18 10:59:39 +02001735 return 0;
1736
1737 /* late RST, already handled */
1738 if (h2s->st == H2_SS_CLOSED)
1739 return 1;
1740
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001741 h2s->errcode = h2_get_n32(&h2c->dbuf, 0);
Willy Tarreau00dd0782018-03-01 16:31:34 +01001742 h2s_close(h2s);
Willy Tarreaucd234e92017-08-18 10:59:39 +02001743
1744 if (h2s->cs) {
Willy Tarreau7ecb6f12018-12-18 16:39:21 +01001745 if (h2s->cs->flags & CS_FL_EOS)
1746 h2s->cs->flags |= CS_FL_ERROR;
1747 else
1748 h2s->cs->flags |= CS_FL_REOS | CS_FL_ERR_PENDING;
1749
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001750 if (h2s->recv_wait) {
1751 struct wait_event *sw = h2s->recv_wait;
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001752
1753 sw->wait_reason &= ~SUB_CAN_RECV;
1754 tasklet_wakeup(sw->task);
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001755 h2s->recv_wait = NULL;
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001756 }
Willy Tarreaucd234e92017-08-18 10:59:39 +02001757 }
1758
1759 h2s->flags |= H2_SF_RST_RCVD;
1760 return 1;
1761
1762 conn_err:
1763 h2c_error(h2c, error);
1764 return 0;
1765}
1766
Willy Tarreau2a761dc2018-02-26 18:50:57 +01001767/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
1768 * It may return an error in h2c or h2s. The caller must consider that the
1769 * return value is the new h2s in case one was allocated (most common case).
1770 * Described in RFC7540#6.2. Most of the
Willy Tarreau13278b42017-10-13 19:23:14 +02001771 * errors here are reported as connection errors since it's impossible to
1772 * recover from such errors after the compression context has been altered.
1773 */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01001774static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
Willy Tarreau13278b42017-10-13 19:23:14 +02001775{
1776 int error;
1777
1778 if (!h2c->dfl) {
1779 error = H2_ERR_PROTOCOL_ERROR; // empty headers frame!
Willy Tarreau22de8d32018-09-05 19:55:58 +02001780 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02001781 goto strm_err;
1782 }
1783
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001784 if (!b_size(&h2c->dbuf))
Willy Tarreau2a761dc2018-02-26 18:50:57 +01001785 return NULL; // empty buffer
Willy Tarreau13278b42017-10-13 19:23:14 +02001786
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001787 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau2a761dc2018-02-26 18:50:57 +01001788 return NULL; // incomplete frame
Willy Tarreau13278b42017-10-13 19:23:14 +02001789
Willy Tarreauf2101912018-07-19 10:11:38 +02001790 if (h2c->flags & H2_CF_DEM_TOOMANY)
1791 return 0; // too many cs still present
1792
Willy Tarreau13278b42017-10-13 19:23:14 +02001793 /* now either the frame is complete or the buffer is complete */
1794 if (h2s->st != H2_SS_IDLE) {
1795 /* FIXME: stream already exists, this is only allowed for
1796 * trailers (not supported for now).
1797 */
1798 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau22de8d32018-09-05 19:55:58 +02001799 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02001800 goto conn_err;
1801 }
1802 else if (h2c->dsi <= h2c->max_id || !(h2c->dsi & 1)) {
1803 /* RFC7540#5.1.1 stream id > prev ones, and must be odd here */
1804 error = H2_ERR_PROTOCOL_ERROR;
Willy Tarreau22de8d32018-09-05 19:55:58 +02001805 sess_log(h2c->conn->owner);
Willy Tarreau13278b42017-10-13 19:23:14 +02001806 goto conn_err;
1807 }
1808
Willy Tarreau22de8d32018-09-05 19:55:58 +02001809 /* Note: we don't emit any other logs below because ff we return
Willy Tarreaua8e49542018-10-03 18:53:55 +02001810 * positively from h2c_frt_stream_new(), the stream will report the error,
1811 * and if we return in error, h2c_frt_stream_new() will emit the error.
Willy Tarreau22de8d32018-09-05 19:55:58 +02001812 */
Willy Tarreaua8e49542018-10-03 18:53:55 +02001813 h2s = h2c_frt_stream_new(h2c, h2c->dsi);
Willy Tarreau13278b42017-10-13 19:23:14 +02001814 if (!h2s) {
1815 error = H2_ERR_INTERNAL_ERROR;
1816 goto conn_err;
1817 }
1818
1819 h2s->st = H2_SS_OPEN;
1820 if (h2c->dff & H2_F_HEADERS_END_STREAM) {
1821 h2s->st = H2_SS_HREM;
1822 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau39d68502018-03-02 12:26:37 +01001823 /* note: cs cannot be null for now (just created above) */
1824 h2s->cs->flags |= CS_FL_REOS;
Willy Tarreau13278b42017-10-13 19:23:14 +02001825 }
1826
Willy Tarreauc3e18f32018-10-08 14:51:56 +02001827 if (!h2s_decode_headers(h2s))
Willy Tarreau2a761dc2018-02-26 18:50:57 +01001828 return NULL;
Willy Tarreau13278b42017-10-13 19:23:14 +02001829
Willy Tarreau8f650c32017-11-21 19:36:21 +01001830 if (h2c->st0 >= H2_CS_ERROR)
Willy Tarreau2a761dc2018-02-26 18:50:57 +01001831 return NULL;
Willy Tarreau8f650c32017-11-21 19:36:21 +01001832
Willy Tarreau721c9742017-11-07 11:05:42 +01001833 if (h2s->st >= H2_SS_ERROR) {
Willy Tarreau13278b42017-10-13 19:23:14 +02001834 /* stream error : send RST_STREAM */
Willy Tarreaua20a5192017-12-27 11:02:06 +01001835 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau13278b42017-10-13 19:23:14 +02001836 }
1837 else {
1838 /* update the max stream ID if the request is being processed */
1839 if (h2s->id > h2c->max_id)
1840 h2c->max_id = h2s->id;
1841 }
1842
Willy Tarreau2a761dc2018-02-26 18:50:57 +01001843 return h2s;
Willy Tarreau13278b42017-10-13 19:23:14 +02001844
1845 conn_err:
1846 h2c_error(h2c, error);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01001847 return NULL;
Willy Tarreau13278b42017-10-13 19:23:14 +02001848
1849 strm_err:
1850 if (h2s) {
1851 h2s_error(h2s, error);
Willy Tarreaua20a5192017-12-27 11:02:06 +01001852 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau13278b42017-10-13 19:23:14 +02001853 }
1854 else
1855 h2c_error(h2c, error);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01001856 return NULL;
Willy Tarreau13278b42017-10-13 19:23:14 +02001857}
1858
Willy Tarreauc12f38f2018-10-08 14:53:27 +02001859/* processes a HEADERS frame. Returns h2s on success or NULL on missing data.
1860 * It may return an error in h2c or h2s. Described in RFC7540#6.2. Most of the
1861 * errors here are reported as connection errors since it's impossible to
1862 * recover from such errors after the compression context has been altered.
1863 */
1864static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
1865{
1866 int error;
1867
1868 if (!h2c->dfl) {
1869 error = H2_ERR_PROTOCOL_ERROR; // empty headers frame!
1870 sess_log(h2c->conn->owner);
1871 goto strm_err;
1872 }
1873
1874 if (!b_size(&h2c->dbuf))
1875 return NULL; // empty buffer
1876
1877 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
1878 return NULL; // incomplete frame
1879
1880 if (h2c->flags & H2_CF_DEM_TOOMANY)
1881 return 0; // too many cs still present
1882
1883 if (h2c->dff & H2_F_HEADERS_END_STREAM) {
1884 h2s->flags |= H2_SF_ES_RCVD;
1885 h2s->cs->flags |= CS_FL_REOS;
1886 }
1887
1888 if (!h2s_decode_headers(h2s))
1889 return NULL;
1890
1891 if (h2c->st0 >= H2_CS_ERROR)
1892 return NULL;
1893
1894 if (h2s->st >= H2_SS_ERROR) {
1895 /* stream error : send RST_STREAM */
1896 h2c->st0 = H2_CS_FRAME_E;
1897 }
1898
1899 if (h2s->cs->flags & CS_FL_ERROR && h2s->st < H2_SS_ERROR)
1900 h2s->st = H2_SS_ERROR;
1901 else if (h2s->cs->flags & CS_FL_REOS && h2s->st == H2_SS_OPEN)
1902 h2s->st = H2_SS_HREM;
1903 else if (h2s->cs->flags & CS_FL_REOS && h2s->st == H2_SS_HLOC)
1904 h2s_close(h2s);
1905
1906 return h2s;
1907
1908 conn_err:
1909 h2c_error(h2c, error);
1910 return NULL;
1911
1912 strm_err:
1913 if (h2s) {
1914 h2s_error(h2s, error);
1915 h2c->st0 = H2_CS_FRAME_E;
1916 }
1917 else
1918 h2c_error(h2c, error);
1919 return NULL;
1920}
1921
Willy Tarreau454f9052017-10-26 19:40:35 +02001922/* processes a DATA frame. Returns > 0 on success or zero on missing data.
1923 * It may return an error in h2c or h2s. Described in RFC7540#6.1.
1924 */
1925static int h2c_frt_handle_data(struct h2c *h2c, struct h2s *h2s)
1926{
1927 int error;
1928
1929 /* note that empty DATA frames are perfectly valid and sometimes used
1930 * to signal an end of stream (with the ES flag).
1931 */
1932
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001933 if (!b_size(&h2c->dbuf) && h2c->dfl)
Willy Tarreau454f9052017-10-26 19:40:35 +02001934 return 0; // empty buffer
1935
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001936 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau454f9052017-10-26 19:40:35 +02001937 return 0; // incomplete frame
1938
1939 /* now either the frame is complete or the buffer is complete */
1940
1941 if (!h2c->dsi) {
1942 /* RFC7540#6.1 */
1943 error = H2_ERR_PROTOCOL_ERROR;
1944 goto conn_err;
1945 }
1946
1947 if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
1948 /* RFC7540#6.1 */
1949 error = H2_ERR_STREAM_CLOSED;
1950 goto strm_err;
1951 }
1952
Willy Tarreaua56a6de2018-02-26 15:59:07 +01001953 if (!h2_frt_transfer_data(h2s))
1954 return 0;
1955
Willy Tarreau454f9052017-10-26 19:40:35 +02001956 /* call the upper layers to process the frame, then let the upper layer
1957 * notify the stream about any change.
1958 */
1959 if (!h2s->cs) {
1960 error = H2_ERR_STREAM_CLOSED;
1961 goto strm_err;
1962 }
1963
Willy Tarreau8f650c32017-11-21 19:36:21 +01001964 if (h2c->st0 >= H2_CS_ERROR)
1965 return 0;
1966
Willy Tarreau721c9742017-11-07 11:05:42 +01001967 if (h2s->st >= H2_SS_ERROR) {
Willy Tarreau454f9052017-10-26 19:40:35 +02001968 /* stream error : send RST_STREAM */
Willy Tarreaua20a5192017-12-27 11:02:06 +01001969 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02001970 }
1971
1972 /* check for completion : the callee will change this to FRAME_A or
1973 * FRAME_H once done.
1974 */
1975 if (h2c->st0 == H2_CS_FRAME_P)
1976 return 0;
1977
Willy Tarreauc4134ba2017-12-11 18:45:08 +01001978
1979 /* last frame */
1980 if (h2c->dff & H2_F_DATA_END_STREAM) {
1981 h2s->st = H2_SS_HREM;
1982 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau39d68502018-03-02 12:26:37 +01001983 h2s->cs->flags |= CS_FL_REOS;
Willy Tarreauc4134ba2017-12-11 18:45:08 +01001984 }
1985
Willy Tarreau454f9052017-10-26 19:40:35 +02001986 return 1;
1987
1988 conn_err:
1989 h2c_error(h2c, error);
1990 return 0;
1991
1992 strm_err:
1993 if (h2s) {
1994 h2s_error(h2s, error);
Willy Tarreaua20a5192017-12-27 11:02:06 +01001995 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau454f9052017-10-26 19:40:35 +02001996 }
1997 else
1998 h2c_error(h2c, error);
1999 return 0;
2000}
2001
Willy Tarreaubc933932017-10-09 16:21:43 +02002002/* process Rx frames to be demultiplexed */
2003static void h2_process_demux(struct h2c *h2c)
2004{
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002005 struct h2s *h2s = NULL, *tmp_h2s;
Willy Tarreauf3ee0692017-10-17 08:18:25 +02002006
Willy Tarreau081d4722017-05-16 21:51:05 +02002007 if (h2c->st0 >= H2_CS_ERROR)
2008 return;
Willy Tarreau52eed752017-09-22 15:05:09 +02002009
2010 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
2011 if (h2c->st0 == H2_CS_PREFACE) {
Willy Tarreau01b44822018-10-03 14:26:37 +02002012 if (h2c->flags & H2_CF_IS_BACK)
2013 return;
Willy Tarreau52eed752017-09-22 15:05:09 +02002014 if (unlikely(h2c_frt_recv_preface(h2c) <= 0)) {
2015 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02002016 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau52eed752017-09-22 15:05:09 +02002017 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002018 sess_log(h2c->conn->owner);
2019 }
Willy Tarreau52eed752017-09-22 15:05:09 +02002020 goto fail;
2021 }
2022
2023 h2c->max_id = 0;
2024 h2c->st0 = H2_CS_SETTINGS1;
2025 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002026
2027 if (h2c->st0 == H2_CS_SETTINGS1) {
2028 struct h2_fh hdr;
2029
2030 /* ensure that what is pending is a valid SETTINGS frame
2031 * without an ACK.
2032 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002033 if (!h2_get_frame_hdr(&h2c->dbuf, &hdr)) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002034 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
Willy Tarreau22de8d32018-09-05 19:55:58 +02002035 if (h2c->st0 == H2_CS_ERROR) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002036 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002037 sess_log(h2c->conn->owner);
2038 }
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002039 goto fail;
2040 }
2041
2042 if (hdr.sid || hdr.ft != H2_FT_SETTINGS || hdr.ff & H2_F_SETTINGS_ACK) {
2043 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
2044 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2045 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002046 sess_log(h2c->conn->owner);
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002047 goto fail;
2048 }
2049
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02002050 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002051 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
2052 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
2053 h2c->st0 = H2_CS_ERROR2;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002054 sess_log(h2c->conn->owner);
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002055 goto fail;
2056 }
2057
2058 /* that's OK, switch to FRAME_P to process it */
2059 h2c->dfl = hdr.len;
2060 h2c->dsi = hdr.sid;
2061 h2c->dft = hdr.ft;
2062 h2c->dff = hdr.ff;
Willy Tarreau05e5daf2017-12-11 15:17:36 +01002063 h2c->dpl = 0;
Willy Tarreau4c3690b2017-10-10 15:16:55 +02002064 h2c->st0 = H2_CS_FRAME_P;
2065 }
Willy Tarreau52eed752017-09-22 15:05:09 +02002066 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002067
2068 /* process as many incoming frames as possible below */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002069 while (b_data(&h2c->dbuf)) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02002070 int ret = 0;
2071
2072 if (h2c->st0 >= H2_CS_ERROR)
2073 break;
2074
2075 if (h2c->st0 == H2_CS_FRAME_H) {
2076 struct h2_fh hdr;
2077
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002078 if (!h2_peek_frame_hdr(&h2c->dbuf, &hdr))
Willy Tarreau7e98c052017-10-10 15:56:59 +02002079 break;
2080
Willy Tarreau3f0e1ec2018-04-17 10:28:27 +02002081 if ((int)hdr.len < 0 || (int)hdr.len > global.tune.bufsize) {
Willy Tarreau7e98c052017-10-10 15:56:59 +02002082 h2c_error(h2c, H2_ERR_FRAME_SIZE_ERROR);
2083 h2c->st0 = H2_CS_ERROR;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002084 if (!h2c->nb_streams) {
2085 /* only log if no other stream can report the error */
2086 sess_log(h2c->conn->owner);
2087 }
Willy Tarreau7e98c052017-10-10 15:56:59 +02002088 break;
2089 }
2090
2091 h2c->dfl = hdr.len;
2092 h2c->dsi = hdr.sid;
2093 h2c->dft = hdr.ft;
2094 h2c->dff = hdr.ff;
Willy Tarreau05e5daf2017-12-11 15:17:36 +01002095 h2c->dpl = 0;
Willy Tarreau7e98c052017-10-10 15:56:59 +02002096 h2c->st0 = H2_CS_FRAME_P;
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002097 h2_skip_frame_hdr(&h2c->dbuf);
Willy Tarreau7e98c052017-10-10 15:56:59 +02002098 }
2099
2100 /* Only H2_CS_FRAME_P and H2_CS_FRAME_A here */
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002101 tmp_h2s = h2c_st_by_id(h2c, h2c->dsi);
2102
Willy Tarreau567beb82018-12-18 16:52:44 +01002103 if (tmp_h2s != h2s && h2s && h2s->cs &&
2104 (b_data(&h2s->rxbuf) ||
2105 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS|CS_FL_REOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002106 /* we may have to signal the upper layers */
2107 h2s->cs->flags |= CS_FL_RCV_MORE;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002108 if (h2s->recv_wait) {
2109 h2s->recv_wait->wait_reason &= ~SUB_CAN_RECV;
2110 tasklet_wakeup(h2s->recv_wait->task);
2111 h2s->recv_wait = NULL;
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002112 }
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002113 }
2114 h2s = tmp_h2s;
Willy Tarreau7e98c052017-10-10 15:56:59 +02002115
Willy Tarreaud7901432017-12-29 11:34:40 +01002116 if (h2c->st0 == H2_CS_FRAME_E)
2117 goto strm_err;
2118
Willy Tarreauf65b80d2017-10-30 11:46:49 +01002119 if (h2s->st == H2_SS_IDLE &&
2120 h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) {
2121 /* RFC7540#5.1: any frame other than HEADERS or PRIORITY in
2122 * this state MUST be treated as a connection error
2123 */
2124 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
2125 h2c->st0 = H2_CS_ERROR;
Willy Tarreau22de8d32018-09-05 19:55:58 +02002126 if (!h2c->nb_streams) {
2127 /* only log if no other stream can report the error */
2128 sess_log(h2c->conn->owner);
2129 }
Willy Tarreauf65b80d2017-10-30 11:46:49 +01002130 break;
2131 }
2132
Willy Tarreauf182a9a2017-10-30 12:03:50 +01002133 if (h2s->st == H2_SS_HREM && h2c->dft != H2_FT_WINDOW_UPDATE &&
2134 h2c->dft != H2_FT_RST_STREAM && h2c->dft != H2_FT_PRIORITY) {
2135 /* RFC7540#5.1: any frame other than WU/PRIO/RST in
2136 * this state MUST be treated as a stream error
2137 */
2138 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2139 goto strm_err;
2140 }
2141
Willy Tarreauab837502017-12-27 15:07:30 +01002142 /* Below the management of frames received in closed state is a
2143 * bit hackish because the spec makes strong differences between
2144 * streams closed by receiving RST, sending RST, and seeing ES
2145 * in both directions. In addition to this, the creation of a
2146 * new stream reusing the identifier of a closed one will be
2147 * detected here. Given that we cannot keep track of all closed
2148 * streams forever, we consider that unknown closed streams were
2149 * closed on RST received, which allows us to respond with an
2150 * RST without breaking the connection (eg: to abort a transfer).
2151 * Some frames have to be silently ignored as well.
2152 */
2153 if (h2s->st == H2_SS_CLOSED && h2c->dsi) {
2154 if (h2c->dft == H2_FT_HEADERS || h2c->dft == H2_FT_PUSH_PROMISE) {
2155 /* #5.1.1: The identifier of a newly
2156 * established stream MUST be numerically
2157 * greater than all streams that the initiating
2158 * endpoint has opened or reserved. This
2159 * governs streams that are opened using a
2160 * HEADERS frame and streams that are reserved
2161 * using PUSH_PROMISE. An endpoint that
2162 * receives an unexpected stream identifier
2163 * MUST respond with a connection error.
2164 */
2165 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
2166 goto strm_err;
2167 }
2168
2169 if (h2s->flags & H2_SF_RST_RCVD) {
2170 /* RFC7540#5.1:closed: an endpoint that
2171 * receives any frame other than PRIORITY after
2172 * receiving a RST_STREAM MUST treat that as a
2173 * stream error of type STREAM_CLOSED.
2174 *
2175 * Note that old streams fall into this category
2176 * and will lead to an RST being sent.
2177 */
2178 h2s_error(h2s, H2_ERR_STREAM_CLOSED);
2179 h2c->st0 = H2_CS_FRAME_E;
2180 goto strm_err;
2181 }
2182
2183 /* RFC7540#5.1:closed: if this state is reached as a
2184 * result of sending a RST_STREAM frame, the peer that
2185 * receives the RST_STREAM might have already sent
2186 * frames on the stream that cannot be withdrawn. An
2187 * endpoint MUST ignore frames that it receives on
2188 * closed streams after it has sent a RST_STREAM
2189 * frame. An endpoint MAY choose to limit the period
2190 * over which it ignores frames and treat frames that
2191 * arrive after this time as being in error.
2192 */
2193 if (!(h2s->flags & H2_SF_RST_SENT)) {
2194 /* RFC7540#5.1:closed: any frame other than
2195 * PRIO/WU/RST in this state MUST be treated as
2196 * a connection error
2197 */
2198 if (h2c->dft != H2_FT_RST_STREAM &&
2199 h2c->dft != H2_FT_PRIORITY &&
2200 h2c->dft != H2_FT_WINDOW_UPDATE) {
2201 h2c_error(h2c, H2_ERR_STREAM_CLOSED);
2202 goto strm_err;
2203 }
2204 }
2205 }
2206
Willy Tarreauc0da1962017-10-30 18:38:00 +01002207#if 0
2208 // problem below: it is not possible to completely ignore such
2209 // streams as we need to maintain the compression state as well
2210 // and for this we need to completely process these frames (eg:
2211 // HEADERS frames) as well as counting DATA frames to emit
2212 // proper WINDOW UPDATES and ensure the connection doesn't stall.
2213 // This is a typical case of layer violation where the
2214 // transported contents are critical to the connection's
2215 // validity and must be ignored at the same time :-(
2216
2217 /* graceful shutdown, ignore streams whose ID is higher than
2218 * the one advertised in GOAWAY. RFC7540#6.8.
2219 */
2220 if (unlikely(h2c->last_sid >= 0) && h2c->dsi > h2c->last_sid) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002221 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
2222 b_del(&h2c->dbuf, ret);
Willy Tarreauc0da1962017-10-30 18:38:00 +01002223 h2c->dfl -= ret;
2224 ret = h2c->dfl == 0;
2225 goto strm_err;
2226 }
2227#endif
2228
Willy Tarreau7e98c052017-10-10 15:56:59 +02002229 switch (h2c->dft) {
Willy Tarreau3421aba2017-07-27 15:41:03 +02002230 case H2_FT_SETTINGS:
2231 if (h2c->st0 == H2_CS_FRAME_P)
2232 ret = h2c_handle_settings(h2c);
2233
2234 if (h2c->st0 == H2_CS_FRAME_A)
2235 ret = h2c_ack_settings(h2c);
2236 break;
2237
Willy Tarreaucf68c782017-10-10 17:11:41 +02002238 case H2_FT_PING:
2239 if (h2c->st0 == H2_CS_FRAME_P)
2240 ret = h2c_handle_ping(h2c);
2241
2242 if (h2c->st0 == H2_CS_FRAME_A)
2243 ret = h2c_ack_ping(h2c);
2244 break;
2245
Willy Tarreau26f95952017-07-27 17:18:30 +02002246 case H2_FT_WINDOW_UPDATE:
2247 if (h2c->st0 == H2_CS_FRAME_P)
2248 ret = h2c_handle_window_update(h2c, h2s);
2249 break;
2250
Willy Tarreau61290ec2017-10-17 08:19:21 +02002251 case H2_FT_CONTINUATION:
2252 /* we currently don't support CONTINUATION frames since
2253 * we have nowhere to store the partial HEADERS frame.
2254 * Let's abort the stream on an INTERNAL_ERROR here.
2255 */
Willy Tarreaua20a5192017-12-27 11:02:06 +01002256 if (h2c->st0 == H2_CS_FRAME_P) {
Willy Tarreau61290ec2017-10-17 08:19:21 +02002257 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
Willy Tarreaua20a5192017-12-27 11:02:06 +01002258 h2c->st0 = H2_CS_FRAME_E;
2259 }
Willy Tarreau61290ec2017-10-17 08:19:21 +02002260 break;
2261
Willy Tarreau13278b42017-10-13 19:23:14 +02002262 case H2_FT_HEADERS:
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002263 if (h2c->st0 == H2_CS_FRAME_P) {
Willy Tarreauc12f38f2018-10-08 14:53:27 +02002264 if (h2c->flags & H2_CF_IS_BACK)
2265 tmp_h2s = h2c_bck_handle_headers(h2c, h2s);
2266 else
2267 tmp_h2s = h2c_frt_handle_headers(h2c, h2s);
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002268 if (tmp_h2s) {
2269 h2s = tmp_h2s;
2270 ret = 1;
2271 }
2272 }
Willy Tarreau13278b42017-10-13 19:23:14 +02002273 break;
2274
Willy Tarreau454f9052017-10-26 19:40:35 +02002275 case H2_FT_DATA:
2276 if (h2c->st0 == H2_CS_FRAME_P)
2277 ret = h2c_frt_handle_data(h2c, h2s);
2278
2279 if (h2c->st0 == H2_CS_FRAME_A)
2280 ret = h2c_send_strm_wu(h2c);
2281 break;
Willy Tarreaucd234e92017-08-18 10:59:39 +02002282
Willy Tarreau92153fc2017-12-03 19:46:19 +01002283 case H2_FT_PRIORITY:
2284 if (h2c->st0 == H2_CS_FRAME_P)
2285 ret = h2c_handle_priority(h2c);
2286 break;
2287
Willy Tarreaucd234e92017-08-18 10:59:39 +02002288 case H2_FT_RST_STREAM:
2289 if (h2c->st0 == H2_CS_FRAME_P)
2290 ret = h2c_handle_rst_stream(h2c, h2s);
2291 break;
2292
Willy Tarreaue96b0922017-10-30 00:28:29 +01002293 case H2_FT_GOAWAY:
2294 if (h2c->st0 == H2_CS_FRAME_P)
2295 ret = h2c_handle_goaway(h2c);
2296 break;
2297
Willy Tarreau1c661982017-10-30 13:52:01 +01002298 case H2_FT_PUSH_PROMISE:
2299 /* not permitted here, RFC7540#5.1 */
2300 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau22de8d32018-09-05 19:55:58 +02002301 if (!h2c->nb_streams) {
2302 /* only log if no other stream can report the error */
2303 sess_log(h2c->conn->owner);
2304 }
Willy Tarreau1c661982017-10-30 13:52:01 +01002305 break;
2306
2307 /* implement all extra frame types here */
Willy Tarreau7e98c052017-10-10 15:56:59 +02002308 default:
2309 /* drop frames that we ignore. They may be larger than
2310 * the buffer so we drain all of their contents until
2311 * we reach the end.
2312 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002313 ret = MIN(b_data(&h2c->dbuf), h2c->dfl);
2314 b_del(&h2c->dbuf, ret);
Willy Tarreau7e98c052017-10-10 15:56:59 +02002315 h2c->dfl -= ret;
2316 ret = h2c->dfl == 0;
2317 }
2318
Willy Tarreauf182a9a2017-10-30 12:03:50 +01002319 strm_err:
Willy Tarreaua20a5192017-12-27 11:02:06 +01002320 /* We may have to send an RST if not done yet */
2321 if (h2s->st == H2_SS_ERROR)
2322 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau27a84c92017-10-17 08:10:17 +02002323
Willy Tarreaua20a5192017-12-27 11:02:06 +01002324 if (h2c->st0 == H2_CS_FRAME_E)
2325 ret = h2c_send_rst_stream(h2c, h2s);
Willy Tarreau27a84c92017-10-17 08:10:17 +02002326
Willy Tarreau7e98c052017-10-10 15:56:59 +02002327 /* error or missing data condition met above ? */
Willy Tarreau1ed87b72018-11-25 08:45:16 +01002328 if (ret <= 0)
Willy Tarreau7e98c052017-10-10 15:56:59 +02002329 break;
2330
2331 if (h2c->st0 != H2_CS_FRAME_H) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002332 b_del(&h2c->dbuf, h2c->dfl);
Willy Tarreau7e98c052017-10-10 15:56:59 +02002333 h2c->st0 = H2_CS_FRAME_H;
2334 }
2335 }
Willy Tarreau52eed752017-09-22 15:05:09 +02002336
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002337 if (h2c->rcvd_c > 0 &&
2338 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM)))
2339 h2c_send_conn_wu(h2c);
2340
Willy Tarreau52eed752017-09-22 15:05:09 +02002341 fail:
2342 /* we can go here on missing data, blocked response or error */
Willy Tarreau567beb82018-12-18 16:52:44 +01002343 if (h2s && h2s->cs &&
2344 (b_data(&h2s->rxbuf) ||
2345 (h2s->cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING|CS_FL_EOS|CS_FL_REOS)))) {
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002346 /* we may have to signal the upper layers */
2347 h2s->cs->flags |= CS_FL_RCV_MORE;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002348 if (h2s->recv_wait) {
Willy Tarreau567beb82018-12-18 16:52:44 +01002349 h2s->recv_wait->wait_reason &= ~SUB_CAN_RECV;
2350 tasklet_wakeup(h2s->recv_wait->task);
2351 h2s->recv_wait = NULL;
Willy Tarreau2a761dc2018-02-26 18:50:57 +01002352 }
2353 }
Willy Tarreau1ed87b72018-11-25 08:45:16 +01002354
2355 if (h2_recv_allowed(h2c))
2356 tasklet_wakeup(h2c->wait_event.task);
Willy Tarreaubc933932017-10-09 16:21:43 +02002357}
2358
2359/* process Tx frames from streams to be multiplexed. Returns > 0 if it reached
2360 * the end.
2361 */
2362static int h2_process_mux(struct h2c *h2c)
2363{
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002364 struct h2s *h2s, *h2s_back;
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02002365
Willy Tarreau01b44822018-10-03 14:26:37 +02002366 if (unlikely(h2c->st0 < H2_CS_FRAME_H)) {
2367 if (unlikely(h2c->st0 == H2_CS_PREFACE && (h2c->flags & H2_CF_IS_BACK))) {
2368 if (unlikely(h2c_bck_send_preface(h2c) <= 0)) {
2369 /* RFC7540#3.5: a GOAWAY frame MAY be omitted */
2370 if (h2c->st0 == H2_CS_ERROR) {
2371 h2c->st0 = H2_CS_ERROR2;
2372 sess_log(h2c->conn->owner);
2373 }
2374 goto fail;
2375 }
2376 h2c->st0 = H2_CS_SETTINGS1;
2377 }
2378 /* need to wait for the other side */
Willy Tarreau75a930a2018-12-12 08:03:58 +01002379 if (h2c->st0 < H2_CS_FRAME_H)
Willy Tarreau01b44822018-10-03 14:26:37 +02002380 return 1;
2381 }
2382
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002383 /* start by sending possibly pending window updates */
2384 if (h2c->rcvd_c > 0 &&
2385 !(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_MUX_MALLOC)) &&
2386 h2c_send_conn_wu(h2c) < 0)
2387 goto fail;
2388
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02002389 /* First we always process the flow control list because the streams
2390 * waiting there were already elected for immediate emission but were
2391 * blocked just on this.
2392 */
2393
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002394 list_for_each_entry_safe(h2s, h2s_back, &h2c->fctl_list, list) {
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02002395 if (h2c->mws <= 0 || h2c->flags & H2_CF_MUX_BLOCK_ANY ||
2396 h2c->st0 >= H2_CS_ERROR)
2397 break;
2398
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002399 h2s->flags &= ~H2_SF_BLK_ANY;
2400 h2s->send_wait->wait_reason &= ~SUB_CAN_SEND;
Olivier Houchardd846c262018-10-19 17:24:29 +02002401 h2s->send_wait->wait_reason |= SUB_CALL_UNSUBSCRIBE;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002402 tasklet_wakeup(h2s->send_wait->task);
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002403 LIST_DEL(&h2s->list);
2404 LIST_INIT(&h2s->list);
Olivier Houchardd846c262018-10-19 17:24:29 +02002405 LIST_ADDQ(&h2c->sending_list, &h2s->list);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02002406 }
2407
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002408 list_for_each_entry_safe(h2s, h2s_back, &h2c->send_list, list) {
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02002409 if (h2c->st0 >= H2_CS_ERROR || h2c->flags & H2_CF_MUX_BLOCK_ANY)
2410 break;
2411
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002412 h2s->flags &= ~H2_SF_BLK_ANY;
2413 h2s->send_wait->wait_reason &= ~SUB_CAN_SEND;
Olivier Houchardd846c262018-10-19 17:24:29 +02002414 h2s->send_wait->wait_reason |= SUB_CALL_UNSUBSCRIBE;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002415 tasklet_wakeup(h2s->send_wait->task);
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002416 LIST_DEL(&h2s->list);
2417 LIST_INIT(&h2s->list);
Olivier Houchardd846c262018-10-19 17:24:29 +02002418 LIST_ADDQ(&h2c->sending_list, &h2s->list);
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02002419 }
2420
Willy Tarreaucc0b8c32017-10-26 16:55:59 +02002421 fail:
Willy Tarreau3eabe9b2017-11-07 11:03:01 +01002422 if (unlikely(h2c->st0 >= H2_CS_ERROR)) {
Willy Tarreau081d4722017-05-16 21:51:05 +02002423 if (h2c->st0 == H2_CS_ERROR) {
2424 if (h2c->max_id >= 0) {
2425 h2c_send_goaway_error(h2c, NULL);
2426 if (h2c->flags & H2_CF_MUX_BLOCK_ANY)
2427 return 0;
2428 }
2429
2430 h2c->st0 = H2_CS_ERROR2; // sent (or failed hard) !
2431 }
2432 return 1;
2433 }
Willy Tarreaubacdf5a2017-10-17 10:57:04 +02002434 return (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) && LIST_ISEMPTY(&h2c->send_list);
Willy Tarreaubc933932017-10-09 16:21:43 +02002435}
2436
Willy Tarreau62f52692017-10-08 23:01:42 +02002437
Willy Tarreau479998a2018-11-18 06:30:59 +01002438/* Attempt to read data, and subscribe if none available.
2439 * The function returns 1 if data has been received, otherwise zero.
2440 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002441static int h2_recv(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02002442{
Olivier Houchardaf4021e2018-08-09 13:06:55 +02002443 struct connection *conn = h2c->conn;
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02002444 struct buffer *buf;
Willy Tarreaua2af5122017-10-09 11:56:46 +02002445 int max;
Olivier Houchard7505f942018-08-21 18:10:44 +02002446 size_t ret;
Willy Tarreaua2af5122017-10-09 11:56:46 +02002447
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002448 if (h2c->wait_event.wait_reason & SUB_CAN_RECV)
Olivier Houchard81a15af2018-10-19 17:26:49 +02002449 return (b_data(&h2c->dbuf));
Olivier Houchardaf4021e2018-08-09 13:06:55 +02002450
Willy Tarreau315d8072017-12-10 22:17:57 +01002451 if (!h2_recv_allowed(h2c))
Olivier Houchard81a15af2018-10-19 17:26:49 +02002452 return 1;
Willy Tarreaua2af5122017-10-09 11:56:46 +02002453
Willy Tarreau44e973f2018-03-01 17:49:30 +01002454 buf = h2_get_buf(h2c, &h2c->dbuf);
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02002455 if (!buf) {
2456 h2c->flags |= H2_CF_DEM_DALLOC;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002457 return 0;
Willy Tarreau1b62c5c2017-09-25 11:55:01 +02002458 }
Willy Tarreau35dbd5d2017-09-22 09:13:49 +02002459
Olivier Houchard7505f942018-08-21 18:10:44 +02002460 do {
Willy Tarreaue0f24ee2018-12-14 10:51:23 +01002461 b_realign_if_empty(buf);
Willy Tarreau2a59e872018-12-12 08:23:47 +01002462 if (!b_data(buf) && (h2c->proxy->options2 & PR_O2_USE_HTX)) {
2463 /* HTX in use : try to pre-align the buffer like the
2464 * rxbufs will be to optimize memory copies. We'll make
2465 * sure that the frame header lands at the end of the
2466 * HTX block to alias it upon recv. We cannot use the
2467 * head because rcv_buf() will realign the buffer if
2468 * it's empty. Thus we cheat and pretend we already
2469 * have a few bytes there.
2470 */
2471 max = buf_room_for_htx_data(buf) + 9;
Willy Tarreauc0960d12018-12-14 10:59:15 +01002472 buf->head = sizeof(struct htx) - 9;
Willy Tarreau2a59e872018-12-12 08:23:47 +01002473 }
2474 else
2475 max = b_room(buf);
2476
Olivier Houchard7505f942018-08-21 18:10:44 +02002477 if (max)
2478 ret = conn->xprt->rcv_buf(conn, buf, max, 0);
2479 else
2480 ret = 0;
2481 } while (ret > 0);
Willy Tarreaua2af5122017-10-09 11:56:46 +02002482
Olivier Houchard53216e72018-10-10 15:46:36 +02002483 if (h2_recv_allowed(h2c) && (b_data(buf) < buf->size))
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002484 conn->xprt->subscribe(conn, SUB_CAN_RECV, &h2c->wait_event);
Olivier Houchard81a15af2018-10-19 17:26:49 +02002485
Olivier Houcharda1411e62018-08-17 18:42:48 +02002486 if (!b_data(buf)) {
Willy Tarreau44e973f2018-03-01 17:49:30 +01002487 h2_release_buf(h2c, &h2c->dbuf);
Olivier Houchard46677732018-11-29 17:06:17 +01002488 return (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn));
Willy Tarreaua2af5122017-10-09 11:56:46 +02002489 }
2490
Willy Tarreaub7b5fe12018-06-18 13:33:09 +02002491 if (b_data(buf) == buf->size)
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02002492 h2c->flags |= H2_CF_DEM_DFULL;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002493 return 1;
Willy Tarreau62f52692017-10-08 23:01:42 +02002494}
2495
Willy Tarreau479998a2018-11-18 06:30:59 +01002496/* Try to send data if possible.
2497 * The function returns 1 if data have been sent, otherwise zero.
2498 */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002499static int h2_send(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02002500{
Olivier Houchard29fb89d2018-08-02 18:56:36 +02002501 struct connection *conn = h2c->conn;
Willy Tarreaubc933932017-10-09 16:21:43 +02002502 int done;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002503 int sent = 0;
Willy Tarreaua2af5122017-10-09 11:56:46 +02002504
2505 if (conn->flags & CO_FL_ERROR)
Olivier Houchard7c6f8b12018-11-13 16:48:36 +01002506 return 1;
Willy Tarreaua2af5122017-10-09 11:56:46 +02002507
Olivier Houchard7505f942018-08-21 18:10:44 +02002508
Willy Tarreaua2af5122017-10-09 11:56:46 +02002509 if (conn->flags & (CO_FL_HANDSHAKE|CO_FL_WAIT_L4_CONN|CO_FL_WAIT_L6_CONN)) {
2510 /* a handshake was requested */
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002511 goto schedule;
Willy Tarreaua2af5122017-10-09 11:56:46 +02002512 }
2513
Willy Tarreaubc933932017-10-09 16:21:43 +02002514 /* This loop is quite simple : it tries to fill as much as it can from
2515 * pending streams into the existing buffer until it's reportedly full
2516 * or the end of send requests is reached. Then it tries to send this
2517 * buffer's contents out, marks it not full if at least one byte could
2518 * be sent, and tries again.
2519 *
2520 * The snd_buf() function normally takes a "flags" argument which may
2521 * be made of a combination of CO_SFL_MSG_MORE to indicate that more
2522 * data immediately comes and CO_SFL_STREAMER to indicate that the
2523 * connection is streaming lots of data (used to increase TLS record
2524 * size at the expense of latency). The former can be sent any time
2525 * there's a buffer full flag, as it indicates at least one stream
2526 * attempted to send and failed so there are pending data. An
2527 * alternative would be to set it as long as there's an active stream
2528 * but that would be problematic for ACKs until we have an absolute
2529 * guarantee that all waiters have at least one byte to send. The
2530 * latter should possibly not be set for now.
2531 */
2532
2533 done = 0;
2534 while (!done) {
2535 unsigned int flags = 0;
2536
2537 /* fill as much as we can into the current buffer */
2538 while (((h2c->flags & (H2_CF_MUX_MFULL|H2_CF_MUX_MALLOC)) == 0) && !done)
2539 done = h2_process_mux(h2c);
2540
2541 if (conn->flags & CO_FL_ERROR)
2542 break;
2543
2544 if (h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MBUSY | H2_CF_DEM_MROOM))
2545 flags |= CO_SFL_MSG_MORE;
2546
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002547 if (b_data(&h2c->mbuf)) {
2548 int ret = conn->xprt->snd_buf(conn, &h2c->mbuf, b_data(&h2c->mbuf), flags);
Willy Tarreau787db9a2018-06-14 18:31:46 +02002549 if (!ret)
2550 break;
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002551 sent = 1;
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002552 b_del(&h2c->mbuf, ret);
2553 b_realign_if_empty(&h2c->mbuf);
Willy Tarreau787db9a2018-06-14 18:31:46 +02002554 }
Willy Tarreaubc933932017-10-09 16:21:43 +02002555
2556 /* wrote at least one byte, the buffer is not full anymore */
2557 h2c->flags &= ~(H2_CF_MUX_MFULL | H2_CF_DEM_MROOM);
2558 }
2559
Willy Tarreaua2af5122017-10-09 11:56:46 +02002560 if (conn->flags & CO_FL_SOCK_WR_SH) {
2561 /* output closed, nothing to send, clear the buffer to release it */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002562 b_reset(&h2c->mbuf);
Willy Tarreaua2af5122017-10-09 11:56:46 +02002563 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02002564 /* We're not full anymore, so we can wake any task that are waiting
2565 * for us.
2566 */
2567 if (!(h2c->flags & (H2_CF_MUX_MFULL | H2_CF_DEM_MROOM))) {
Olivier Houchard8ae735d2018-09-11 18:24:28 +02002568 while (!LIST_ISEMPTY(&h2c->send_list)) {
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002569 struct h2s *h2s = LIST_ELEM(h2c->send_list.n,
2570 struct h2s *, list);
2571 LIST_DEL(&h2s->list);
2572 LIST_INIT(&h2s->list);
Olivier Houchardd846c262018-10-19 17:24:29 +02002573 LIST_ADDQ(&h2c->sending_list, &h2s->list);
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002574 h2s->send_wait->wait_reason &= ~SUB_CAN_SEND;
Olivier Houchardd846c262018-10-19 17:24:29 +02002575 h2s->send_wait->wait_reason |= SUB_CALL_UNSUBSCRIBE;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002576 tasklet_wakeup(h2s->send_wait->task);
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02002577 }
Olivier Houchard6ff20392018-07-17 18:46:31 +02002578 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02002579 /* We're done, no more to send */
2580 if (!b_data(&h2c->mbuf))
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002581 return sent;
Olivier Houchard910b2bc2018-07-17 18:49:38 +02002582schedule:
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002583 if (!(h2c->wait_event.wait_reason & SUB_CAN_SEND))
2584 conn->xprt->subscribe(conn, SUB_CAN_SEND, &h2c->wait_event);
Olivier Houchardd4dd22d2018-08-17 18:39:46 +02002585 return sent;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02002586}
2587
2588static struct task *h2_io_cb(struct task *t, void *ctx, unsigned short status)
2589{
2590 struct h2c *h2c = ctx;
Olivier Houchard7505f942018-08-21 18:10:44 +02002591 int ret = 0;
Olivier Houchard29fb89d2018-08-02 18:56:36 +02002592
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002593 if (!(h2c->wait_event.wait_reason & SUB_CAN_SEND))
Olivier Houchard7505f942018-08-21 18:10:44 +02002594 ret = h2_send(h2c);
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002595 if (!(h2c->wait_event.wait_reason & SUB_CAN_RECV))
Olivier Houchard7505f942018-08-21 18:10:44 +02002596 ret |= h2_recv(h2c);
Willy Tarreaucef5c8e2018-12-18 10:29:54 +01002597 if (ret || b_data(&h2c->dbuf))
Olivier Houchard7505f942018-08-21 18:10:44 +02002598 h2_process(h2c);
Olivier Houchard910b2bc2018-07-17 18:49:38 +02002599 return NULL;
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02002600}
Willy Tarreaua2af5122017-10-09 11:56:46 +02002601
Willy Tarreau62f52692017-10-08 23:01:42 +02002602/* callback called on any event by the connection handler.
2603 * It applies changes and returns zero, or < 0 if it wants immediate
2604 * destruction of the connection (which normally doesn not happen in h2).
2605 */
Olivier Houchard7505f942018-08-21 18:10:44 +02002606static int h2_process(struct h2c *h2c)
Willy Tarreau62f52692017-10-08 23:01:42 +02002607{
Olivier Houchard7505f942018-08-21 18:10:44 +02002608 struct connection *conn = h2c->conn;
Willy Tarreaua2af5122017-10-09 11:56:46 +02002609
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002610 if (b_data(&h2c->dbuf) && !(h2c->flags & H2_CF_DEM_BLOCK_ANY)) {
Willy Tarreaud13bf272017-12-14 10:34:52 +01002611 h2_process_demux(h2c);
2612
2613 if (h2c->st0 >= H2_CS_ERROR || conn->flags & CO_FL_ERROR)
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002614 b_reset(&h2c->dbuf);
Willy Tarreaud13bf272017-12-14 10:34:52 +01002615
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002616 if (!b_full(&h2c->dbuf))
Willy Tarreaud13bf272017-12-14 10:34:52 +01002617 h2c->flags &= ~H2_CF_DEM_DFULL;
2618 }
Olivier Houchard7505f942018-08-21 18:10:44 +02002619 h2_send(h2c);
Willy Tarreaud13bf272017-12-14 10:34:52 +01002620
Willy Tarreau0b37d652018-10-03 10:33:02 +02002621 if (unlikely(h2c->proxy->state == PR_STSTOPPED)) {
Willy Tarreau8ec14062017-12-30 18:08:13 +01002622 /* frontend is stopping, reload likely in progress, let's try
2623 * to announce a graceful shutdown if not yet done. We don't
2624 * care if it fails, it will be tried again later.
2625 */
2626 if (!(h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED))) {
2627 if (h2c->last_sid < 0)
2628 h2c->last_sid = (1U << 31) - 1;
2629 h2c_send_goaway_error(h2c, NULL);
2630 }
2631 }
2632
Olivier Houchard7fc96d52017-11-23 18:25:47 +01002633 /*
Olivier Houchard6fa63d92017-11-27 18:41:32 +01002634 * If we received early data, and the handshake is done, wake
2635 * any stream that was waiting for it.
Olivier Houchard7fc96d52017-11-23 18:25:47 +01002636 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +01002637 if (!(h2c->flags & H2_CF_WAIT_FOR_HS) &&
2638 (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_HANDSHAKE | CO_FL_EARLY_DATA)) == CO_FL_EARLY_DATA) {
2639 struct eb32_node *node;
2640 struct h2s *h2s;
2641
2642 h2c->flags |= H2_CF_WAIT_FOR_HS;
2643 node = eb32_lookup_ge(&h2c->streams_by_id, 1);
2644
2645 while (node) {
2646 h2s = container_of(node, struct h2s, by_id);
Olivier Houchardc2aa7112018-09-11 18:27:21 +02002647 if ((h2s->cs->flags & CS_FL_WAIT_FOR_HS) &&
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002648 h2s->recv_wait) {
2649 struct wait_event *sw = h2s->recv_wait;
Olivier Houchardc2aa7112018-09-11 18:27:21 +02002650 sw->wait_reason &= ~SUB_CAN_RECV;
2651 tasklet_wakeup(sw->task);
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002652 h2s->recv_wait = NULL;
Olivier Houchardc2aa7112018-09-11 18:27:21 +02002653 }
Olivier Houchard6fa63d92017-11-27 18:41:32 +01002654 node = eb32_next(node);
2655 }
Olivier Houchard7fc96d52017-11-23 18:25:47 +01002656 }
Olivier Houchard6fa63d92017-11-27 18:41:32 +01002657
Willy Tarreau26bd7612017-10-09 16:47:04 +02002658 if (conn->flags & CO_FL_ERROR || conn_xprt_read0_pending(conn) ||
Willy Tarreau29a98242017-10-31 06:59:15 +01002659 h2c->st0 == H2_CS_ERROR2 || h2c->flags & H2_CF_GOAWAY_FAILED ||
2660 (eb_is_empty(&h2c->streams_by_id) && h2c->last_sid >= 0 &&
2661 h2c->max_id >= h2c->last_sid)) {
Willy Tarreau23b92aa2017-10-30 00:26:54 +01002662 h2_wake_some_streams(h2c, 0, 0);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02002663
2664 if (eb_is_empty(&h2c->streams_by_id)) {
2665 /* no more stream, kill the connection now */
2666 h2_release(conn);
2667 return -1;
2668 }
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02002669 }
2670
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002671 if (!b_data(&h2c->dbuf))
Willy Tarreau44e973f2018-03-01 17:49:30 +01002672 h2_release_buf(h2c, &h2c->dbuf);
Willy Tarreaufbe3b4f2017-10-09 15:14:19 +02002673
Olivier Houchard53216e72018-10-10 15:46:36 +02002674 if ((conn->flags & CO_FL_SOCK_WR_SH) ||
2675 h2c->st0 == H2_CS_ERROR2 || (h2c->flags & H2_CF_GOAWAY_FAILED) ||
2676 (h2c->st0 != H2_CS_ERROR &&
2677 !b_data(&h2c->mbuf) &&
2678 (h2c->mws <= 0 || LIST_ISEMPTY(&h2c->fctl_list)) &&
2679 ((h2c->flags & H2_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&h2c->send_list))))
Willy Tarreau44e973f2018-03-01 17:49:30 +01002680 h2_release_buf(h2c, &h2c->mbuf);
Willy Tarreaua2af5122017-10-09 11:56:46 +02002681
Willy Tarreau3f133572017-10-31 19:21:06 +01002682 if (h2c->task) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002683 if (eb_is_empty(&h2c->streams_by_id) || b_data(&h2c->mbuf)) {
Willy Tarreau599391a2017-11-24 10:16:00 +01002684 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
Willy Tarreau3f133572017-10-31 19:21:06 +01002685 task_queue(h2c->task);
2686 }
2687 else
2688 h2c->task->expire = TICK_ETERNITY;
Willy Tarreauea392822017-10-31 10:02:25 +01002689 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +02002690
Olivier Houchard7505f942018-08-21 18:10:44 +02002691 h2_send(h2c);
Willy Tarreau62f52692017-10-08 23:01:42 +02002692 return 0;
2693}
2694
Olivier Houchard21df6cc2018-09-14 23:21:44 +02002695static int h2_wake(struct connection *conn)
2696{
2697 struct h2c *h2c = conn->mux_ctx;
2698
2699 return (h2_process(h2c));
2700}
2701
Willy Tarreauea392822017-10-31 10:02:25 +01002702/* Connection timeout management. The principle is that if there's no receipt
2703 * nor sending for a certain amount of time, the connection is closed. If the
2704 * MUX buffer still has lying data or is not allocatable, the connection is
2705 * immediately killed. If it's allocatable and empty, we attempt to send a
2706 * GOAWAY frame.
2707 */
Olivier Houchard9f6af332018-05-25 14:04:04 +02002708static struct task *h2_timeout_task(struct task *t, void *context, unsigned short state)
Willy Tarreauea392822017-10-31 10:02:25 +01002709{
Olivier Houchard9f6af332018-05-25 14:04:04 +02002710 struct h2c *h2c = context;
Willy Tarreauea392822017-10-31 10:02:25 +01002711 int expired = tick_is_expired(t->expire, now_ms);
2712
Willy Tarreau0975f112018-03-29 15:22:59 +02002713 if (!expired && h2c)
Willy Tarreauea392822017-10-31 10:02:25 +01002714 return t;
2715
Willy Tarreau0975f112018-03-29 15:22:59 +02002716 task_delete(t);
2717 task_free(t);
2718
2719 if (!h2c) {
2720 /* resources were already deleted */
2721 return NULL;
2722 }
2723
2724 h2c->task = NULL;
Willy Tarreauea392822017-10-31 10:02:25 +01002725 h2c_error(h2c, H2_ERR_NO_ERROR);
2726 h2_wake_some_streams(h2c, 0, 0);
2727
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002728 if (b_data(&h2c->mbuf)) {
Willy Tarreauea392822017-10-31 10:02:25 +01002729 /* don't even try to send a GOAWAY, the buffer is stuck */
2730 h2c->flags |= H2_CF_GOAWAY_FAILED;
2731 }
2732
2733 /* try to send but no need to insist */
Willy Tarreau599391a2017-11-24 10:16:00 +01002734 h2c->last_sid = h2c->max_id;
Willy Tarreauea392822017-10-31 10:02:25 +01002735 if (h2c_send_goaway_error(h2c, NULL) <= 0)
2736 h2c->flags |= H2_CF_GOAWAY_FAILED;
2737
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002738 if (b_data(&h2c->mbuf) && !(h2c->flags & H2_CF_GOAWAY_FAILED) && conn_xprt_ready(h2c->conn)) {
2739 int ret = h2c->conn->xprt->snd_buf(h2c->conn, &h2c->mbuf, b_data(&h2c->mbuf), 0);
Willy Tarreau787db9a2018-06-14 18:31:46 +02002740 if (ret > 0) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002741 b_del(&h2c->mbuf, ret);
2742 b_realign_if_empty(&h2c->mbuf);
Willy Tarreau787db9a2018-06-14 18:31:46 +02002743 }
2744 }
Willy Tarreauea392822017-10-31 10:02:25 +01002745
Willy Tarreau0975f112018-03-29 15:22:59 +02002746 /* either we can release everything now or it will be done later once
2747 * the last stream closes.
2748 */
2749 if (eb_is_empty(&h2c->streams_by_id))
2750 h2_release(h2c->conn);
Willy Tarreauea392822017-10-31 10:02:25 +01002751
Willy Tarreauea392822017-10-31 10:02:25 +01002752 return NULL;
2753}
2754
2755
Willy Tarreau62f52692017-10-08 23:01:42 +02002756/*******************************************/
2757/* functions below are used by the streams */
2758/*******************************************/
2759
2760/*
2761 * Attach a new stream to a connection
2762 * (Used for outgoing connections)
2763 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01002764static struct conn_stream *h2_attach(struct connection *conn, struct session *sess)
Willy Tarreau62f52692017-10-08 23:01:42 +02002765{
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01002766 struct conn_stream *cs;
2767 struct h2s *h2s;
2768 struct h2c *h2c = conn->mux_ctx;
2769
2770 cs = cs_new(conn);
2771 if (!cs)
2772 return NULL;
Olivier Houchardf502aca2018-12-14 19:42:40 +01002773 h2s = h2c_bck_stream_new(h2c, cs, sess);
Olivier Houchard7a57e8a2018-11-27 17:36:33 +01002774 if (!h2s) {
2775 cs_free(cs);
2776 return NULL;
2777 }
2778 return cs;
Willy Tarreau62f52692017-10-08 23:01:42 +02002779}
2780
Willy Tarreaufafd3982018-11-18 21:29:20 +01002781/* Retrieves the first valid conn_stream from this connection, or returns NULL.
2782 * We have to scan because we may have some orphan streams. It might be
2783 * beneficial to scan backwards from the end to reduce the likeliness to find
2784 * orphans.
2785 */
2786static const struct conn_stream *h2_get_first_cs(const struct connection *conn)
2787{
2788 struct h2c *h2c = conn->mux_ctx;
2789 struct h2s *h2s;
2790 struct eb32_node *node;
2791
2792 node = eb32_first(&h2c->streams_by_id);
2793 while (node) {
2794 h2s = container_of(node, struct h2s, by_id);
2795 if (h2s->cs)
2796 return h2s->cs;
2797 node = eb32_next(node);
2798 }
2799 return NULL;
2800}
2801
Willy Tarreau62f52692017-10-08 23:01:42 +02002802/*
Olivier Houchard060ed432018-11-06 16:32:42 +01002803 * Destroy the mux and the associated connection, if it is no longer used
2804 */
2805static void h2_destroy(struct connection *conn)
2806{
2807 struct h2c *h2c = conn->mux_ctx;
2808
2809 if (eb_is_empty(&h2c->streams_by_id))
2810 h2_release(h2c->conn);
2811}
2812
2813/*
Willy Tarreau62f52692017-10-08 23:01:42 +02002814 * Detach the stream from the connection and possibly release the connection.
2815 */
2816static void h2_detach(struct conn_stream *cs)
2817{
Willy Tarreau60935142017-10-16 18:11:19 +02002818 struct h2s *h2s = cs->ctx;
2819 struct h2c *h2c;
Olivier Houchardf502aca2018-12-14 19:42:40 +01002820 struct session *sess;
Willy Tarreau60935142017-10-16 18:11:19 +02002821
2822 cs->ctx = NULL;
2823 if (!h2s)
2824 return;
2825
Olivier Houchardf502aca2018-12-14 19:42:40 +01002826 sess = h2s->sess;
Willy Tarreau60935142017-10-16 18:11:19 +02002827 h2c = h2s->h2c;
2828 h2s->cs = NULL;
Willy Tarreau7ac60e82018-07-19 09:04:05 +02002829 h2c->nb_cs--;
Willy Tarreauf2101912018-07-19 10:11:38 +02002830 if (h2c->flags & H2_CF_DEM_TOOMANY &&
2831 !h2_has_too_many_cs(h2c)) {
2832 h2c->flags &= ~H2_CF_DEM_TOOMANY;
Olivier Houchard53216e72018-10-10 15:46:36 +02002833 if (h2_recv_allowed(h2c))
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002834 tasklet_wakeup(h2c->wait_event.task);
Willy Tarreauf2101912018-07-19 10:11:38 +02002835 }
Willy Tarreau60935142017-10-16 18:11:19 +02002836
Willy Tarreau22cf59b2017-11-10 11:42:33 +01002837 /* this stream may be blocked waiting for some data to leave (possibly
2838 * an ES or RST frame), so orphan it in this case.
2839 */
Willy Tarreau3041fcc2018-03-29 15:41:32 +02002840 if (!(cs->conn->flags & CO_FL_ERROR) &&
Willy Tarreaua2b51812018-07-27 09:55:14 +02002841 (h2c->st0 < H2_CS_ERROR) &&
Willy Tarreau3041fcc2018-03-29 15:41:32 +02002842 (h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL)))
Willy Tarreau22cf59b2017-11-10 11:42:33 +01002843 return;
2844
Willy Tarreau45f752e2017-10-30 15:44:59 +01002845 if ((h2c->flags & H2_CF_DEM_BLOCK_ANY && h2s->id == h2c->dsi) ||
2846 (h2c->flags & H2_CF_MUX_BLOCK_ANY && h2s->id == h2c->msi)) {
2847 /* unblock the connection if it was blocked on this
2848 * stream.
2849 */
2850 h2c->flags &= ~H2_CF_DEM_BLOCK_ANY;
2851 h2c->flags &= ~H2_CF_MUX_BLOCK_ANY;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002852 tasklet_wakeup(h2c->wait_event.task);
Willy Tarreau45f752e2017-10-30 15:44:59 +01002853 }
2854
Willy Tarreau71049cc2018-03-28 13:56:39 +02002855 h2s_destroy(h2s);
Willy Tarreau60935142017-10-16 18:11:19 +02002856
Olivier Houchard8a786902018-12-15 16:05:40 +01002857 if (h2c->flags & H2_CF_IS_BACK &&
2858 (h2c->proxy->options2 & PR_O2_USE_HTX)) {
Olivier Houchard8a786902018-12-15 16:05:40 +01002859 if (!(h2c->conn->flags &
2860 (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH))) {
2861 if (!h2c->conn->owner) {
Olivier Houchardf502aca2018-12-14 19:42:40 +01002862 h2c->conn->owner = sess;
2863 session_add_conn(sess, h2c->conn, h2c->conn->target);
Olivier Houchard8a786902018-12-15 16:05:40 +01002864 }
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +01002865 if (eb_is_empty(&h2c->streams_by_id)) {
2866 if (session_check_idle_conn(h2c->conn->owner, h2c->conn) != 0)
2867 /* At this point either the connection is destroyed, or it's been added to the server idle list, just stop */
2868 return;
2869 }
Olivier Houchard8a786902018-12-15 16:05:40 +01002870 /* Never ever allow to reuse a connection from a non-reuse backend */
2871 if ((h2c->proxy->options & PR_O_REUSE_MASK) == PR_O_REUSE_NEVR)
2872 h2c->conn->flags |= CO_FL_PRIVATE;
2873 if (LIST_ISEMPTY(&h2c->conn->list)) {
2874 struct server *srv = objt_server(h2c->conn->target);
2875
2876 if (srv) {
2877 if (h2c->conn->flags & CO_FL_PRIVATE)
2878 LIST_ADD(&srv->priv_conns[tid], &h2c->conn->list);
2879 else
2880 LIST_ADD(&srv->idle_conns[tid], &h2c->conn->list);
2881 }
2882
2883 }
2884 }
2885 }
2886
Willy Tarreaue323f342018-03-28 13:51:45 +02002887 /* We don't want to close right now unless we're removing the
2888 * last stream, and either the connection is in error, or it
2889 * reached the ID already specified in a GOAWAY frame received
2890 * or sent (as seen by last_sid >= 0).
2891 */
2892 if (eb_is_empty(&h2c->streams_by_id) && /* don't close if streams exist */
2893 ((h2c->conn->flags & CO_FL_ERROR) || /* errors close immediately */
Willy Tarreau42d55b92018-06-13 14:24:56 +02002894 (h2c->st0 >= H2_CS_ERROR && !h2c->task) || /* a timeout stroke earlier */
Olivier Houchard52b94662018-10-21 03:01:20 +02002895 (h2c->flags & (H2_CF_GOAWAY_FAILED | H2_CF_GOAWAY_SENT)) ||
Olivier Houchard93c88522018-11-30 15:39:16 +01002896 (!(h2c->conn->owner)) || /* Nobody's left to take care of the connection, drop it now */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002897 (!b_data(&h2c->mbuf) && /* mux buffer empty, also process clean events below */
Willy Tarreaue323f342018-03-28 13:51:45 +02002898 (conn_xprt_read0_pending(h2c->conn) ||
2899 (h2c->last_sid >= 0 && h2c->max_id >= h2c->last_sid))))) {
2900 /* no more stream will come, kill it now */
2901 h2_release(h2c->conn);
2902 }
2903 else if (h2c->task) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02002904 if (eb_is_empty(&h2c->streams_by_id) || b_data(&h2c->mbuf)) {
Willy Tarreaue323f342018-03-28 13:51:45 +02002905 h2c->task->expire = tick_add(now_ms, h2c->last_sid < 0 ? h2c->timeout : h2c->shut_timeout);
2906 task_queue(h2c->task);
Willy Tarreaue6ae77f2017-11-07 11:59:51 +01002907 }
Willy Tarreaue323f342018-03-28 13:51:45 +02002908 else
2909 h2c->task->expire = TICK_ETERNITY;
Willy Tarreau60935142017-10-16 18:11:19 +02002910 }
Willy Tarreau62f52692017-10-08 23:01:42 +02002911}
2912
Olivier Houchard8ae735d2018-09-11 18:24:28 +02002913static void h2_do_shutr(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02002914{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02002915 struct h2c *h2c = h2s->h2c;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002916 struct wait_event *sw = &h2s->wait_event;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002917
Willy Tarreau721c9742017-11-07 11:05:42 +01002918 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED)
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002919 return;
2920
Willy Tarreau926fa4c2017-11-07 14:42:12 +01002921 /* if no outgoing data was seen on this stream, it means it was
2922 * closed with a "tcp-request content" rule that is normally
2923 * used to kill the connection ASAP (eg: limit abuse). In this
2924 * case we send a goaway to close the connection.
2925 */
Willy Tarreau90c32322017-11-24 08:00:30 +01002926 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02002927 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02002928 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01002929
Willy Tarreau926fa4c2017-11-07 14:42:12 +01002930 if (!(h2s->flags & H2_SF_OUTGOING_DATA) &&
2931 !(h2s->h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED)) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02002932 h2c_send_goaway_error(h2c, h2s) <= 0)
2933 return;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002934
Olivier Houchard435ce2d2018-12-03 18:43:16 +01002935 if (!(h2c->wait_event.wait_reason & SUB_CAN_SEND))
2936 tasklet_wakeup(h2c->wait_event.task);
Willy Tarreau00dd0782018-03-01 16:31:34 +01002937 h2s_close(h2s);
Willy Tarreaub2e290a2018-03-30 17:35:38 +02002938
Olivier Houchard8ae735d2018-09-11 18:24:28 +02002939 return;
2940add_to_list:
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002941 if (LIST_ISEMPTY(&h2s->list)) {
Olivier Houchard8ae735d2018-09-11 18:24:28 +02002942 sw->wait_reason |= SUB_CAN_SEND;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002943 if (h2s->flags & H2_SF_BLK_MFCTL) {
2944 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
2945 h2s->send_wait = sw;
2946 } else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM)) {
2947 h2s->send_wait = sw;
2948 LIST_ADDQ(&h2c->send_list, &h2s->list);
2949 }
Willy Tarreaub2e290a2018-03-30 17:35:38 +02002950 }
Olivier Houchard8ae735d2018-09-11 18:24:28 +02002951 /* Let the handler know we want shutr */
2952 sw->handle = (void *)((long)sw->handle | 1);
2953
Willy Tarreau62f52692017-10-08 23:01:42 +02002954}
2955
Olivier Houchard8ae735d2018-09-11 18:24:28 +02002956static void h2_do_shutw(struct h2s *h2s)
Willy Tarreau62f52692017-10-08 23:01:42 +02002957{
Olivier Houchard8ae735d2018-09-11 18:24:28 +02002958 struct h2c *h2c = h2s->h2c;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002959 struct wait_event *sw = &h2s->wait_event;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002960
Willy Tarreau721c9742017-11-07 11:05:42 +01002961 if (h2s->st == H2_SS_HLOC || h2s->st == H2_SS_ERROR || h2s->st == H2_SS_CLOSED)
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002962 return;
2963
Willy Tarreau67434202017-11-06 20:20:51 +01002964 if (h2s->flags & H2_SF_HEADERS_SENT) {
Willy Tarreau58e32082017-11-07 14:41:09 +01002965 /* we can cleanly close using an empty data frame only after headers */
2966
2967 if (!(h2s->flags & (H2_SF_ES_SENT|H2_SF_RST_SENT)) &&
2968 h2_send_empty_data_es(h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02002969 goto add_to_list;
Willy Tarreau58e32082017-11-07 14:41:09 +01002970
2971 if (h2s->st == H2_SS_HREM)
Willy Tarreau00dd0782018-03-01 16:31:34 +01002972 h2s_close(h2s);
Willy Tarreau58e32082017-11-07 14:41:09 +01002973 else
2974 h2s->st = H2_SS_HLOC;
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002975 } else {
Willy Tarreau926fa4c2017-11-07 14:42:12 +01002976 /* if no outgoing data was seen on this stream, it means it was
2977 * closed with a "tcp-request content" rule that is normally
2978 * used to kill the connection ASAP (eg: limit abuse). In this
2979 * case we send a goaway to close the connection.
Willy Tarreaua1349f02017-10-31 07:41:55 +01002980 */
Willy Tarreau90c32322017-11-24 08:00:30 +01002981 if (!(h2s->flags & H2_SF_RST_SENT) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02002982 h2s_send_rst_stream(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02002983 goto add_to_list;
Willy Tarreau90c32322017-11-24 08:00:30 +01002984
Willy Tarreau926fa4c2017-11-07 14:42:12 +01002985 if (!(h2s->flags & H2_SF_OUTGOING_DATA) &&
2986 !(h2s->h2c->flags & (H2_CF_GOAWAY_SENT|H2_CF_GOAWAY_FAILED)) &&
Olivier Houchard8ae735d2018-09-11 18:24:28 +02002987 h2c_send_goaway_error(h2c, h2s) <= 0)
Willy Tarreaub2e290a2018-03-30 17:35:38 +02002988 goto add_to_list;
Willy Tarreaua1349f02017-10-31 07:41:55 +01002989
Willy Tarreau00dd0782018-03-01 16:31:34 +01002990 h2s_close(h2s);
Willy Tarreauc7576ea2017-10-29 22:00:09 +01002991 }
2992
Olivier Houchard435ce2d2018-12-03 18:43:16 +01002993 if (!(h2c->wait_event.wait_reason & SUB_CAN_SEND))
2994 tasklet_wakeup(h2c->wait_event.task);
2995 return;
Willy Tarreaub2e290a2018-03-30 17:35:38 +02002996
2997 add_to_list:
Olivier Houchardfa8aa862018-10-10 18:25:41 +02002998 if (LIST_ISEMPTY(&h2s->list)) {
Olivier Houchard8ae735d2018-09-11 18:24:28 +02002999 sw->wait_reason |= SUB_CAN_SEND;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003000 if (h2s->flags & H2_SF_BLK_MFCTL) {
3001 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
3002 h2s->send_wait = sw;
3003 } else if (h2s->flags & (H2_SF_BLK_MBUSY|H2_SF_BLK_MROOM)) {
3004 h2s->send_wait = sw;
3005 LIST_ADDQ(&h2c->send_list, &h2s->list);
3006 }
Willy Tarreaub2e290a2018-03-30 17:35:38 +02003007 }
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003008 /* let the handler know we want to shutw */
3009 sw->handle = (void *)((long)(sw->handle) | 2);
3010
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003011}
3012
3013static struct task *h2_deferred_shut(struct task *t, void *ctx, unsigned short state)
3014{
3015 struct h2s *h2s = ctx;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02003016 long reason = (long)h2s->wait_event.handle;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003017
Olivier Houchard2c68a462018-12-15 22:42:20 +01003018 if (h2s->send_wait) {
3019 h2s->send_wait->wait_reason &= ~SUB_CALL_UNSUBSCRIBE;
3020 h2s->send_wait = NULL;
3021 LIST_DEL(&h2s->list);
3022 LIST_INIT(&h2s->list);
3023 }
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003024 if (reason & 2)
3025 h2_do_shutw(h2s);
Olivier Houchard2c68a462018-12-15 22:42:20 +01003026 if (reason & 1)
3027 h2_do_shutr(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003028
Olivier Houchard2c68a462018-12-15 22:42:20 +01003029 if (h2s->st == H2_SS_CLOSED &&
Olivier Houchardffda58b2018-12-16 01:29:11 +01003030 !((h2s->flags & (H2_SF_BLK_MBUSY | H2_SF_BLK_MROOM | H2_SF_BLK_MFCTL))) && !h2s->cs)
Olivier Houchard2c68a462018-12-15 22:42:20 +01003031 h2s_destroy(h2s);
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003032 return NULL;
Willy Tarreau62f52692017-10-08 23:01:42 +02003033}
3034
Olivier Houchard8ae735d2018-09-11 18:24:28 +02003035static void h2_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
3036{
3037 struct h2s *h2s = cs->ctx;
3038
3039 if (!mode)
3040 return;
3041
3042 h2_do_shutr(h2s);
3043}
3044
3045static void h2_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
3046{
3047 struct h2s *h2s = cs->ctx;
3048
3049 h2_do_shutw(h2s);
3050}
3051
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01003052/* Decode the payload of a HEADERS frame and produce the equivalent HTTP/1 or
Willy Tarreauc3e18f32018-10-08 14:51:56 +02003053 * HTX request or response depending on the connection's side. Returns the
3054 * number of bytes emitted if > 0, or 0 if it couldn't proceed. Stream errors
3055 * are reported in h2s->errcode and connection errors in h2c->errcode.
Willy Tarreau13278b42017-10-13 19:23:14 +02003056 */
Willy Tarreauc3e18f32018-10-08 14:51:56 +02003057static int h2s_decode_headers(struct h2s *h2s)
Willy Tarreau13278b42017-10-13 19:23:14 +02003058{
3059 struct h2c *h2c = h2s->h2c;
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003060 const uint8_t *hdrs = (uint8_t *)b_head(&h2c->dbuf);
Willy Tarreau83061a82018-07-13 11:56:34 +02003061 struct buffer *tmp = get_trash_chunk();
Willy Tarreau59a10fb2017-11-21 20:03:02 +01003062 struct http_hdr list[MAX_HTTP_HDR * 2];
Willy Tarreau83061a82018-07-13 11:56:34 +02003063 struct buffer *copy = NULL;
Willy Tarreau174b06a2018-04-25 18:13:58 +02003064 unsigned int msgf;
Willy Tarreau937f7602018-02-26 15:22:17 +01003065 struct buffer *csbuf;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01003066 struct htx *htx = NULL;
Willy Tarreau13278b42017-10-13 19:23:14 +02003067 int flen = h2c->dfl;
3068 int outlen = 0;
3069 int wrap;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01003070 int try = 0;
Willy Tarreau13278b42017-10-13 19:23:14 +02003071
3072 if (!h2c->dfl) {
3073 h2s_error(h2s, H2_ERR_PROTOCOL_ERROR); // empty headers frame!
Willy Tarreaua20a5192017-12-27 11:02:06 +01003074 h2c->st0 = H2_CS_FRAME_E;
Willy Tarreau13278b42017-10-13 19:23:14 +02003075 return 0;
3076 }
3077
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003078 if (b_data(&h2c->dbuf) < h2c->dfl && !b_full(&h2c->dbuf))
Willy Tarreau68472622017-12-11 18:36:37 +01003079 return 0; // incomplete input frame
3080
Willy Tarreau13278b42017-10-13 19:23:14 +02003081 /* if the input buffer wraps, take a temporary copy of it (rare) */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003082 wrap = b_wrap(&h2c->dbuf) - b_head(&h2c->dbuf);
Willy Tarreau13278b42017-10-13 19:23:14 +02003083 if (wrap < h2c->dfl) {
Willy Tarreau68dd9852017-07-03 14:44:26 +02003084 copy = alloc_trash_chunk();
3085 if (!copy) {
3086 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
3087 goto fail;
3088 }
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003089 memcpy(copy->area, b_head(&h2c->dbuf), wrap);
3090 memcpy(copy->area + wrap, b_orig(&h2c->dbuf), h2c->dfl - wrap);
3091 hdrs = (uint8_t *) copy->area;
Willy Tarreau13278b42017-10-13 19:23:14 +02003092 }
3093
3094 /* The padlen is the first byte before data, and the padding appears
3095 * after data. padlen+data+padding are included in flen.
3096 */
3097 if (h2c->dff & H2_F_HEADERS_PADDED) {
Willy Tarreau05e5daf2017-12-11 15:17:36 +01003098 h2c->dpl = *hdrs;
3099 if (h2c->dpl >= flen) {
Willy Tarreau13278b42017-10-13 19:23:14 +02003100 /* RFC7540#6.2 : pad length = length of frame payload or greater */
3101 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreaua0d11b62018-09-05 18:30:05 +02003102 goto fail;
Willy Tarreau13278b42017-10-13 19:23:14 +02003103 }
Willy Tarreau05e5daf2017-12-11 15:17:36 +01003104 flen -= h2c->dpl + 1;
Willy Tarreau13278b42017-10-13 19:23:14 +02003105 hdrs += 1; // skip Pad Length
3106 }
3107
3108 /* Skip StreamDep and weight for now (we don't support PRIORITY) */
3109 if (h2c->dff & H2_F_HEADERS_PRIORITY) {
Willy Tarreau18b86cd2017-12-03 19:24:50 +01003110 if (read_n32(hdrs) == h2s->id) {
3111 /* RFC7540#5.3.1 : stream dep may not depend on itself */
3112 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreaua0d11b62018-09-05 18:30:05 +02003113 goto fail;
Willy Tarreau18b86cd2017-12-03 19:24:50 +01003114 }
3115
Willy Tarreau13278b42017-10-13 19:23:14 +02003116 hdrs += 5; // stream dep = 4, weight = 1
3117 flen -= 5;
3118 }
3119
3120 /* FIXME: lack of END_HEADERS means there's a continuation frame, we
3121 * don't support this for now and can't even decompress so we have to
3122 * break the connection.
3123 */
3124 if (!(h2c->dff & H2_F_HEADERS_END_HEADERS)) {
3125 h2c_error(h2c, H2_ERR_INTERNAL_ERROR);
Willy Tarreau68dd9852017-07-03 14:44:26 +02003126 goto fail;
Willy Tarreau13278b42017-10-13 19:23:14 +02003127 }
3128
Olivier Houchard638b7992018-08-16 15:41:52 +02003129 csbuf = h2_get_buf(h2c, &h2s->rxbuf);
Willy Tarreau937f7602018-02-26 15:22:17 +01003130 if (!csbuf) {
3131 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01003132 goto fail;
3133 }
Willy Tarreau13278b42017-10-13 19:23:14 +02003134
Willy Tarreau937f7602018-02-26 15:22:17 +01003135 /* we can't retry a failed decompression operation so we must be very
3136 * careful not to take any risks. In practice the output buffer is
3137 * always empty except maybe for trailers, in which case we simply have
3138 * to wait for the upper layer to finish consuming what is available.
3139 */
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01003140
3141 if (h2c->proxy->options2 & PR_O2_USE_HTX) {
3142 htx = htx_from_buf(&h2s->rxbuf);
3143 if (!htx_is_empty(htx))
3144 goto fail;
3145 } else {
3146 if (b_data(csbuf))
3147 goto fail;
Willy Tarreau59a10fb2017-11-21 20:03:02 +01003148
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01003149 csbuf->head = 0;
3150 try = b_size(csbuf);
3151 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01003152
3153 outlen = hpack_decode_frame(h2c->ddht, hdrs, flen, list,
3154 sizeof(list)/sizeof(list[0]), tmp);
3155 if (outlen < 0) {
3156 h2c_error(h2c, H2_ERR_COMPRESSION_ERROR);
3157 goto fail;
3158 }
3159
3160 /* OK now we have our header list in <list> */
Willy Tarreau174b06a2018-04-25 18:13:58 +02003161 msgf = (h2c->dff & H2_F_DATA_END_STREAM) ? 0 : H2_MSGF_BODY;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01003162
Willy Tarreauc3e18f32018-10-08 14:51:56 +02003163 if (htx) {
3164 /* HTX mode */
3165 if (h2c->flags & H2_CF_IS_BACK)
3166 outlen = h2_make_htx_response(list, htx, &msgf);
3167 else
3168 outlen = h2_make_htx_request(list, htx, &msgf);
3169 } else {
3170 /* HTTP/1 mode */
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01003171 outlen = h2_make_h1_request(list, b_tail(csbuf), try, &msgf);
Willy Tarreauc3e18f32018-10-08 14:51:56 +02003172 }
Willy Tarreau59a10fb2017-11-21 20:03:02 +01003173
3174 if (outlen < 0) {
3175 h2c_error(h2c, H2_ERR_COMPRESSION_ERROR);
3176 goto fail;
3177 }
Willy Tarreau13278b42017-10-13 19:23:14 +02003178
Willy Tarreau174b06a2018-04-25 18:13:58 +02003179 if (msgf & H2_MSGF_BODY) {
3180 /* a payload is present */
3181 if (msgf & H2_MSGF_BODY_CL)
3182 h2s->flags |= H2_SF_DATA_CLEN;
Olivier Houchard50d660c2018-12-08 00:18:31 +01003183 else if (!(msgf & H2_MSGF_BODY_TUNNEL) && !htx)
Willy Tarreau174b06a2018-04-25 18:13:58 +02003184 h2s->flags |= H2_SF_DATA_CHNK;
3185 }
3186
Willy Tarreau13278b42017-10-13 19:23:14 +02003187 /* now consume the input data */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003188 b_del(&h2c->dbuf, h2c->dfl);
Willy Tarreau13278b42017-10-13 19:23:14 +02003189 h2c->st0 = H2_CS_FRAME_H;
Willy Tarreau937f7602018-02-26 15:22:17 +01003190 b_add(csbuf, outlen);
Willy Tarreau13278b42017-10-13 19:23:14 +02003191
Willy Tarreau39d68502018-03-02 12:26:37 +01003192 if (h2c->dff & H2_F_HEADERS_END_STREAM) {
Willy Tarreau13278b42017-10-13 19:23:14 +02003193 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau39d68502018-03-02 12:26:37 +01003194 h2s->cs->flags |= CS_FL_REOS;
Willy Tarreaubd4a6b62018-11-27 09:29:36 +01003195 if (htx)
3196 htx_add_endof(htx, HTX_BLK_EOM);
Willy Tarreau39d68502018-03-02 12:26:37 +01003197 }
Willy Tarreau937f7602018-02-26 15:22:17 +01003198
Willy Tarreau68dd9852017-07-03 14:44:26 +02003199 leave:
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003200 if (htx)
3201 htx_to_buf(htx, &h2s->rxbuf);
Willy Tarreau68dd9852017-07-03 14:44:26 +02003202 free_trash_chunk(copy);
Willy Tarreau13278b42017-10-13 19:23:14 +02003203 return outlen;
Willy Tarreau68dd9852017-07-03 14:44:26 +02003204 fail:
3205 outlen = 0;
3206 goto leave;
Willy Tarreau13278b42017-10-13 19:23:14 +02003207}
3208
Willy Tarreau454f9052017-10-26 19:40:35 +02003209/* Transfer the payload of a DATA frame to the HTTP/1 side. When content-length
3210 * or a tunnel is used, the contents are copied as-is. When chunked encoding is
3211 * in use, a new chunk is emitted for each frame. This is supposed to fit
3212 * because the smallest chunk takes 1 byte for the size, 2 for CRLF, X for the
3213 * data, 2 for the extra CRLF, so that's 5+X, while on the H2 side the smallest
3214 * frame will be 9+X bytes based on the same buffer size. The HTTP/2 frame
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003215 * parser state is automatically updated. Returns > 0 if it could completely
3216 * send the current frame, 0 if it couldn't complete, in which case
3217 * CS_FL_RCV_MORE must be checked to know if some data remain pending (an empty
3218 * DATA frame can return 0 as a valid result). Stream errors are reported in
3219 * h2s->errcode and connection errors in h2c->errcode. The caller must already
3220 * have checked the frame header and ensured that the frame was complete or the
3221 * buffer full. It changes the frame state to FRAME_A once done.
Willy Tarreau454f9052017-10-26 19:40:35 +02003222 */
Willy Tarreau454b57b2018-02-26 15:50:05 +01003223static int h2_frt_transfer_data(struct h2s *h2s)
Willy Tarreau454f9052017-10-26 19:40:35 +02003224{
3225 struct h2c *h2c = h2s->h2c;
3226 int block1, block2;
Willy Tarreaud755ea62018-02-26 15:44:54 +01003227 unsigned int flen = 0;
Willy Tarreaueba10f22018-04-25 20:44:22 +02003228 unsigned int chklen = 0;
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003229 struct htx *htx = NULL;
Willy Tarreaud755ea62018-02-26 15:44:54 +01003230 struct buffer *csbuf;
Willy Tarreau454f9052017-10-26 19:40:35 +02003231
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003232 h2c->flags &= ~H2_CF_DEM_SFULL;
Willy Tarreau454f9052017-10-26 19:40:35 +02003233
3234 /* The padlen is the first byte before data, and the padding appears
3235 * after data. padlen+data+padding are included in flen.
3236 */
Willy Tarreau79127812017-12-03 21:06:59 +01003237 if (h2c->dff & H2_F_DATA_PADDED) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003238 if (b_data(&h2c->dbuf) < 1)
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003239 return 0;
3240
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003241 h2c->dpl = *(uint8_t *)b_head(&h2c->dbuf);
Willy Tarreau05e5daf2017-12-11 15:17:36 +01003242 if (h2c->dpl >= h2c->dfl) {
Willy Tarreau454f9052017-10-26 19:40:35 +02003243 /* RFC7540#6.1 : pad length = length of frame payload or greater */
3244 h2c_error(h2c, H2_ERR_PROTOCOL_ERROR);
Willy Tarreau454f9052017-10-26 19:40:35 +02003245 return 0;
3246 }
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003247
3248 /* skip the padlen byte */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003249 b_del(&h2c->dbuf, 1);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003250 h2c->dfl--;
3251 h2c->rcvd_c++; h2c->rcvd_s++;
3252 h2c->dff &= ~H2_F_DATA_PADDED;
Willy Tarreau454f9052017-10-26 19:40:35 +02003253 }
3254
Olivier Houchard638b7992018-08-16 15:41:52 +02003255 csbuf = h2_get_buf(h2c, &h2s->rxbuf);
Willy Tarreaud755ea62018-02-26 15:44:54 +01003256 if (!csbuf) {
3257 h2c->flags |= H2_CF_DEM_SALLOC;
Willy Tarreau454b57b2018-02-26 15:50:05 +01003258 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01003259 }
3260
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003261try_again:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003262 flen = h2c->dfl - h2c->dpl;
3263 if (!flen)
Willy Tarreau4a28da12018-01-04 14:41:00 +01003264 goto end_transfer;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003265
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003266 if (flen > b_data(&h2c->dbuf)) {
3267 flen = b_data(&h2c->dbuf);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003268 if (!flen)
Willy Tarreau454b57b2018-02-26 15:50:05 +01003269 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01003270 }
3271
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003272 if (h2c->proxy->options2 & PR_O2_USE_HTX) {
3273 htx = htx_from_buf(csbuf);
3274 block1 = htx_free_data_space(htx);
3275 if (!block1) {
3276 h2c->flags |= H2_CF_DEM_SFULL;
3277 goto fail;
3278 }
3279 if (flen > block1)
3280 flen = block1;
3281
3282 /* here, flen is the max we can copy into the output buffer */
3283 block1 = b_contig_data(&h2c->dbuf, 0);
3284 if (flen > block1)
3285 flen = block1;
3286
3287 if (!htx_add_data(htx, ist2(b_head(&h2c->dbuf), flen))) {
3288 h2c->flags |= H2_CF_DEM_SFULL;
3289 goto fail;
3290 }
3291
3292 b_del(&h2c->dbuf, flen);
3293 h2c->dfl -= flen;
3294 h2c->rcvd_c += flen;
3295 h2c->rcvd_s += flen; // warning, this can also affect the closed streams!
3296 goto try_again;
3297 }
3298 else if (unlikely(b_space_wraps(csbuf))) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01003299 /* it doesn't fit and the buffer is fragmented,
3300 * so let's defragment it and try again.
3301 */
3302 b_slow_realign(csbuf, trash.area, 0);
Willy Tarreau454f9052017-10-26 19:40:35 +02003303 }
3304
Willy Tarreaueba10f22018-04-25 20:44:22 +02003305 /* chunked-encoding requires more room */
3306 if (h2s->flags & H2_SF_DATA_CHNK) {
Willy Tarreaud755ea62018-02-26 15:44:54 +01003307 chklen = MIN(flen, b_room(csbuf));
Willy Tarreaueba10f22018-04-25 20:44:22 +02003308 chklen = (chklen < 16) ? 1 : (chklen < 256) ? 2 :
3309 (chklen < 4096) ? 3 : (chklen < 65536) ? 4 :
3310 (chklen < 1048576) ? 4 : 8;
3311 chklen += 4; // CRLF, CRLF
3312 }
3313
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003314 /* does it fit in output buffer or should we wait ? */
Willy Tarreaud755ea62018-02-26 15:44:54 +01003315 if (flen + chklen > b_room(csbuf)) {
3316 if (chklen >= b_room(csbuf)) {
3317 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau454b57b2018-02-26 15:50:05 +01003318 goto fail;
Willy Tarreaud755ea62018-02-26 15:44:54 +01003319 }
3320 flen = b_room(csbuf) - chklen;
Willy Tarreaueba10f22018-04-25 20:44:22 +02003321 }
3322
3323 if (h2s->flags & H2_SF_DATA_CHNK) {
3324 /* emit the chunk size */
3325 unsigned int chksz = flen;
3326 char str[10];
3327 char *beg;
3328
3329 beg = str + sizeof(str);
3330 *--beg = '\n';
3331 *--beg = '\r';
3332 do {
3333 *--beg = hextab[chksz & 0xF];
3334 } while (chksz >>= 4);
Willy Tarreaud755ea62018-02-26 15:44:54 +01003335 b_putblk(csbuf, beg, str + sizeof(str) - beg);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003336 }
3337
Willy Tarreau454f9052017-10-26 19:40:35 +02003338 /* Block1 is the length of the first block before the buffer wraps,
3339 * block2 is the optional second block to reach the end of the frame.
3340 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003341 block1 = b_contig_data(&h2c->dbuf, 0);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003342 if (block1 > flen)
3343 block1 = flen;
Willy Tarreau454f9052017-10-26 19:40:35 +02003344 block2 = flen - block1;
3345
3346 if (block1)
Willy Tarreaud755ea62018-02-26 15:44:54 +01003347 b_putblk(csbuf, b_head(&h2c->dbuf), block1);
Willy Tarreau454f9052017-10-26 19:40:35 +02003348
3349 if (block2)
Willy Tarreaud755ea62018-02-26 15:44:54 +01003350 b_putblk(csbuf, b_peek(&h2c->dbuf, block1), block2);
Willy Tarreau454f9052017-10-26 19:40:35 +02003351
Willy Tarreaueba10f22018-04-25 20:44:22 +02003352 if (h2s->flags & H2_SF_DATA_CHNK) {
3353 /* emit the CRLF */
Willy Tarreaud755ea62018-02-26 15:44:54 +01003354 b_putblk(csbuf, "\r\n", 2);
Willy Tarreaueba10f22018-04-25 20:44:22 +02003355 }
3356
Willy Tarreau454f9052017-10-26 19:40:35 +02003357 /* now mark the input data as consumed (will be deleted from the buffer
3358 * by the caller when seeing FRAME_A after sending the window update).
3359 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003360 b_del(&h2c->dbuf, flen);
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003361 h2c->dfl -= flen;
3362 h2c->rcvd_c += flen;
3363 h2c->rcvd_s += flen; // warning, this can also affect the closed streams!
3364
3365 if (h2c->dfl > h2c->dpl) {
3366 /* more data available, transfer stalled on stream full */
Willy Tarreaud755ea62018-02-26 15:44:54 +01003367 h2c->flags |= H2_CF_DEM_SFULL;
Willy Tarreau454b57b2018-02-26 15:50:05 +01003368 goto fail;
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003369 }
3370
Willy Tarreau4a28da12018-01-04 14:41:00 +01003371 end_transfer:
Willy Tarreau8fc016d2017-12-11 18:27:15 +01003372 /* here we're done with the frame, all the payload (except padding) was
3373 * transferred.
3374 */
Willy Tarreaueba10f22018-04-25 20:44:22 +02003375
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003376 if (h2c->dff & H2_F_DATA_END_STREAM) {
3377 if (htx) {
3378 if (!htx_add_endof(htx, HTX_BLK_EOM)) {
3379 h2c->flags |= H2_CF_DEM_SFULL;
3380 goto fail;
3381 }
Willy Tarreaud755ea62018-02-26 15:44:54 +01003382 }
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003383 else if (h2s->flags & H2_SF_DATA_CHNK) {
3384 /* emit the trailing 0 CRLF CRLF */
3385 if (b_room(csbuf) < 5) {
3386 h2c->flags |= H2_CF_DEM_SFULL;
3387 goto fail;
3388 }
3389 chklen += 5;
3390 b_putblk(csbuf, "0\r\n\r\n", 5);
3391 }
Willy Tarreaueba10f22018-04-25 20:44:22 +02003392 }
3393
Willy Tarreaud1023bb2018-03-22 16:53:12 +01003394 h2c->rcvd_c += h2c->dpl;
3395 h2c->rcvd_s += h2c->dpl;
3396 h2c->dpl = 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02003397 h2c->st0 = H2_CS_FRAME_A; // send the corresponding window update
3398
Willy Tarreau39d68502018-03-02 12:26:37 +01003399 if (h2c->dff & H2_F_DATA_END_STREAM) {
Willy Tarreau454f9052017-10-26 19:40:35 +02003400 h2s->flags |= H2_SF_ES_RCVD;
Willy Tarreau39d68502018-03-02 12:26:37 +01003401 h2s->cs->flags |= CS_FL_REOS;
3402 }
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003403 if (htx)
3404 htx_to_buf(htx, csbuf);
Willy Tarreau61ea7dc2018-12-01 23:23:04 +01003405 return 1;
Willy Tarreau454b57b2018-02-26 15:50:05 +01003406 fail:
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01003407 if (htx)
3408 htx_to_buf(htx, csbuf);
Willy Tarreau454b57b2018-02-26 15:50:05 +01003409 return 0;
Willy Tarreau454f9052017-10-26 19:40:35 +02003410}
3411
Willy Tarreau5dd17352018-06-14 13:33:30 +02003412/* Try to send a HEADERS frame matching HTTP/1 response present at offset <ofs>
3413 * and for <max> bytes in buffer <buf> for the H2 stream <h2s>. Returns the
3414 * number of bytes sent. The caller must check the stream's status to detect
3415 * any error which might have happened subsequently to a successful send.
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003416 */
Willy Tarreau206ba832018-06-14 15:27:31 +02003417static 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 +02003418{
3419 struct http_hdr list[MAX_HTTP_HDR];
3420 struct h2c *h2c = h2s->h2c;
Willy Tarreaua40704a2018-09-11 13:52:04 +02003421 struct h1m *h1m = &h2s->h1m;
Willy Tarreau83061a82018-07-13 11:56:34 +02003422 struct buffer outbuf;
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02003423 union h1_sl sl;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003424 int es_now = 0;
3425 int ret = 0;
3426 int hdr;
3427
3428 if (h2c_mux_busy(h2c, h2s)) {
3429 h2s->flags |= H2_SF_BLK_MBUSY;
3430 return 0;
3431 }
3432
Willy Tarreau44e973f2018-03-01 17:49:30 +01003433 if (!h2_get_buf(h2c, &h2c->mbuf)) {
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003434 h2c->flags |= H2_CF_MUX_MALLOC;
3435 h2s->flags |= H2_SF_BLK_MROOM;
3436 return 0;
3437 }
3438
3439 /* First, try to parse the H1 response and index it into <list>.
3440 * NOTE! Since it comes from haproxy, we *know* that a response header
3441 * block does not wrap and we can safely read it this way without
3442 * having to realign the buffer.
3443 */
Willy Tarreau5dd17352018-06-14 13:33:30 +02003444 ret = h1_headers_to_hdr_list(b_peek(buf, ofs), b_peek(buf, ofs) + max,
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02003445 list, sizeof(list)/sizeof(list[0]), h1m, &sl);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003446 if (ret <= 0) {
Willy Tarreauf13ef962017-11-02 15:14:19 +01003447 /* incomplete or invalid response, this is abnormal coming from
3448 * haproxy and may only result in a bad errorfile or bad Lua code
3449 * so that won't be fixed, raise an error now.
3450 *
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003451 * FIXME: we should instead add the ability to only return a
3452 * 502 bad gateway. But in theory this is not supposed to
3453 * happen.
3454 */
3455 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
3456 ret = 0;
3457 goto end;
3458 }
3459
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02003460 h2s->status = sl.st.status;
Willy Tarreaudb72da02018-09-13 11:52:20 +02003461
3462 /* certain statuses have no body or an empty one, regardless of
3463 * what the headers say.
3464 */
3465 if (sl.st.status >= 100 && sl.st.status < 200) {
3466 h1m->flags &= ~(H1_MF_CLEN | H1_MF_CHNK);
3467 h1m->curr_len = h1m->body_len = 0;
3468 }
3469 else if (sl.st.status == 204 || sl.st.status == 304) {
3470 /* no contents, claim c-len is present and set to zero */
3471 h1m->flags &= ~H1_MF_CHNK;
3472 h1m->flags |= H1_MF_CLEN;
3473 h1m->curr_len = h1m->body_len = 0;
3474 }
3475
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003476 chunk_reset(&outbuf);
3477
3478 while (1) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003479 outbuf.area = b_tail(&h2c->mbuf);
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003480 outbuf.size = b_contig_space(&h2c->mbuf);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003481 outbuf.data = 0;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003482
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003483 if (outbuf.size >= 9 || !b_space_wraps(&h2c->mbuf))
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003484 break;
3485 realign_again:
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003486 b_slow_realign(&h2c->mbuf, trash.area, b_data(&h2c->mbuf));
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003487 }
3488
Willy Tarreaub5b7d4a2018-09-12 18:51:18 +02003489 if (outbuf.size < 9)
3490 goto full;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003491
3492 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003493 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
3494 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
3495 outbuf.data = 9;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003496
3497 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01003498 if (unlikely(list[0].v.len != 3)) {
Willy Tarreaua87f2022017-11-09 11:23:00 +01003499 /* this is an unparsable response */
3500 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
3501 ret = 0;
3502 goto end;
3503 }
Willy Tarreauaafdf582018-12-10 18:06:40 +01003504
3505 if (!hpack_encode_str_status(&outbuf, h2s->status, list[0].v)) {
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003506 if (b_space_wraps(&h2c->mbuf))
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003507 goto realign_again;
Willy Tarreaub5b7d4a2018-09-12 18:51:18 +02003508 goto full;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003509 }
3510
3511 /* encode all headers, stop at empty name */
3512 for (hdr = 1; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
Willy Tarreaua76e4c22017-11-24 08:17:28 +01003513 /* these ones do not exist in H2 and must be dropped. */
3514 if (isteq(list[hdr].n, ist("connection")) ||
3515 isteq(list[hdr].n, ist("proxy-connection")) ||
3516 isteq(list[hdr].n, ist("keep-alive")) ||
3517 isteq(list[hdr].n, ist("upgrade")) ||
3518 isteq(list[hdr].n, ist("transfer-encoding")))
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003519 continue;
3520
3521 if (isteq(list[hdr].n, ist("")))
3522 break; // end
3523
3524 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
3525 /* output full */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003526 if (b_space_wraps(&h2c->mbuf))
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003527 goto realign_again;
Willy Tarreaub5b7d4a2018-09-12 18:51:18 +02003528 goto full;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003529 }
3530 }
3531
3532 /* we may need to add END_STREAM */
3533 if (((h1m->flags & H1_MF_CLEN) && !h1m->body_len) || h2s->cs->flags & CS_FL_SHW)
3534 es_now = 1;
3535
3536 /* update the frame's size */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003537 h2_set_frame_size(outbuf.area, outbuf.data - 9);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003538
3539 if (es_now)
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003540 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003541
3542 /* consume incoming H1 response */
Willy Tarreau5dd17352018-06-14 13:33:30 +02003543 max -= ret;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003544
3545 /* commit the H2 response */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003546 b_add(&h2c->mbuf, outbuf.data);
Willy Tarreau67434202017-11-06 20:20:51 +01003547 h2s->flags |= H2_SF_HEADERS_SENT;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003548
3549 /* for now we don't implemented CONTINUATION, so we wait for a
3550 * body or directly end in TRL2.
3551 */
3552 if (es_now) {
Willy Tarreau35a62702018-02-27 15:37:25 +01003553 // trim any possibly pending data (eg: inconsistent content-length)
Willy Tarreau5dd17352018-06-14 13:33:30 +02003554 ret += max;
Willy Tarreau35a62702018-02-27 15:37:25 +01003555
Willy Tarreau801250e2018-09-11 11:45:04 +02003556 h1m->state = H1_MSG_DONE;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003557 h2s->flags |= H2_SF_ES_SENT;
3558 if (h2s->st == H2_SS_OPEN)
3559 h2s->st = H2_SS_HLOC;
3560 else
Willy Tarreau00dd0782018-03-01 16:31:34 +01003561 h2s_close(h2s);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003562 }
Willy Tarreau9c5e22e2018-09-11 19:22:14 +02003563 else if (h2s->status >= 100 && h2s->status < 200) {
Willy Tarreau87285592017-11-29 15:41:32 +01003564 /* we'll let the caller check if it has more headers to send */
Willy Tarreau7f437ff2018-09-11 13:51:19 +02003565 h1m_init_res(h1m);
Willy Tarreau9b8cd1f2018-09-12 09:24:38 +02003566 h1m->err_pos = -1; // don't care about errors on the response path
Willy Tarreaueb528db2018-09-12 09:54:00 +02003567 h2s->h1m.flags |= H1_MF_TOLOWER;
Willy Tarreau87285592017-11-29 15:41:32 +01003568 goto end;
Willy Tarreauc199faf2017-10-31 08:35:27 +01003569 }
Willy Tarreau001823c2018-09-12 17:25:32 +02003570
3571 /* now the h1m state is either H1_MSG_CHUNK_SIZE or H1_MSG_DATA */
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003572
3573 end:
Dirkjan Bussinkc26c72d2018-09-14 14:30:25 +02003574 //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 +02003575 return ret;
Willy Tarreaub5b7d4a2018-09-12 18:51:18 +02003576 full:
3577 h1m_init_res(h1m);
3578 h1m->err_pos = -1; // don't care about errors on the response path
3579 h2c->flags |= H2_CF_MUX_MFULL;
3580 h2s->flags |= H2_SF_BLK_MROOM;
3581 ret = 0;
3582 goto end;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02003583}
3584
Willy Tarreau5dd17352018-06-14 13:33:30 +02003585/* Try to send a DATA frame matching HTTP/1 response present at offset <ofs>
3586 * for up to <max> bytes in response buffer <buf>, for stream <h2s>. Returns
3587 * the number of bytes sent. The caller must check the stream's status to
3588 * detect any error which might have happened subsequently to a successful send.
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003589 */
Willy Tarreau206ba832018-06-14 15:27:31 +02003590static 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 +02003591{
3592 struct h2c *h2c = h2s->h2c;
Willy Tarreaua40704a2018-09-11 13:52:04 +02003593 struct h1m *h1m = &h2s->h1m;
Willy Tarreau83061a82018-07-13 11:56:34 +02003594 struct buffer outbuf;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003595 int ret = 0;
Willy Tarreau1dc41e72018-06-14 13:21:28 +02003596 size_t total = 0;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003597 int es_now = 0;
3598 int size = 0;
Willy Tarreau206ba832018-06-14 15:27:31 +02003599 const char *blk1, *blk2;
Willy Tarreau55f3ce12018-07-18 11:49:27 +02003600 size_t len1, len2;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003601
3602 if (h2c_mux_busy(h2c, h2s)) {
3603 h2s->flags |= H2_SF_BLK_MBUSY;
3604 goto end;
3605 }
3606
Willy Tarreau44e973f2018-03-01 17:49:30 +01003607 if (!h2_get_buf(h2c, &h2c->mbuf)) {
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003608 h2c->flags |= H2_CF_MUX_MALLOC;
3609 h2s->flags |= H2_SF_BLK_MROOM;
3610 goto end;
3611 }
3612
3613 new_frame:
Willy Tarreau5dd17352018-06-14 13:33:30 +02003614 if (!max)
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003615 goto end;
3616
3617 chunk_reset(&outbuf);
3618
3619 while (1) {
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003620 outbuf.area = b_tail(&h2c->mbuf);
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003621 outbuf.size = b_contig_space(&h2c->mbuf);
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003622 outbuf.data = 0;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003623
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003624 if (outbuf.size >= 9 || !b_space_wraps(&h2c->mbuf))
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003625 break;
3626 realign_again:
Willy Tarreau06ae84a2018-12-12 09:17:21 +01003627 /* If there are pending data in the output buffer, and we have
3628 * less than 1/4 of the mbuf's size and everything fits, we'll
3629 * still perform a copy anyway. Otherwise we'll pretend the mbuf
3630 * is full and wait, to save some slow realign calls.
3631 */
3632 if ((max + 9 > b_room(&h2c->mbuf) || max >= b_size(&h2c->mbuf) / 4)) {
3633 h2c->flags |= H2_CF_MUX_MFULL;
3634 h2s->flags |= H2_SF_BLK_MROOM;
3635 goto end;
3636 }
3637
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003638 b_slow_realign(&h2c->mbuf, trash.area, b_data(&h2c->mbuf));
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003639 }
3640
3641 if (outbuf.size < 9) {
3642 h2c->flags |= H2_CF_MUX_MFULL;
3643 h2s->flags |= H2_SF_BLK_MROOM;
3644 goto end;
3645 }
3646
3647 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003648 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
3649 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
3650 outbuf.data = 9;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003651
3652 switch (h1m->flags & (H1_MF_CLEN|H1_MF_CHNK)) {
3653 case 0: /* no content length, read till SHUTW */
Willy Tarreau5dd17352018-06-14 13:33:30 +02003654 size = max;
Willy Tarreau13e4e942017-12-14 10:55:21 +01003655 h1m->curr_len = size;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003656 break;
3657 case H1_MF_CLEN: /* content-length: read only h2m->body_len */
Willy Tarreau5dd17352018-06-14 13:33:30 +02003658 size = max;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003659 if ((long long)size > h1m->curr_len)
3660 size = h1m->curr_len;
3661 break;
3662 default: /* te:chunked : parse chunks */
Willy Tarreau801250e2018-09-11 11:45:04 +02003663 if (h1m->state == H1_MSG_CHUNK_CRLF) {
Willy Tarreauc0973c62018-06-14 15:53:21 +02003664 ret = h1_skip_chunk_crlf(buf, ofs, ofs + max);
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003665 if (!ret)
3666 goto end;
3667
3668 if (ret < 0) {
3669 /* FIXME: bad contents. how to proceed here when we're in H2 ? */
Willy Tarreau25173a72018-09-12 09:05:16 +02003670 h1m->err_pos = ofs + max + ret;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003671 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
3672 goto end;
3673 }
Willy Tarreau5dd17352018-06-14 13:33:30 +02003674 max -= ret;
3675 ofs += ret;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003676 total += ret;
Willy Tarreau801250e2018-09-11 11:45:04 +02003677 h1m->state = H1_MSG_CHUNK_SIZE;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003678 }
3679
Willy Tarreau801250e2018-09-11 11:45:04 +02003680 if (h1m->state == H1_MSG_CHUNK_SIZE) {
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003681 unsigned int chunk;
Willy Tarreau84d6b7a2018-06-14 15:59:05 +02003682 ret = h1_parse_chunk_size(buf, ofs, ofs + max, &chunk);
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003683 if (!ret)
3684 goto end;
3685
3686 if (ret < 0) {
3687 /* FIXME: bad contents. how to proceed here when we're in H2 ? */
Willy Tarreau25173a72018-09-12 09:05:16 +02003688 h1m->err_pos = ofs + max + ret;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003689 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
3690 goto end;
3691 }
3692
3693 size = chunk;
3694 h1m->curr_len = chunk;
3695 h1m->body_len += chunk;
Willy Tarreau5dd17352018-06-14 13:33:30 +02003696 max -= ret;
3697 ofs += ret;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003698 total += ret;
Willy Tarreau801250e2018-09-11 11:45:04 +02003699 h1m->state = size ? H1_MSG_DATA : H1_MSG_TRAILERS;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003700 if (!size)
3701 goto send_empty;
3702 }
3703
3704 /* in MSG_DATA state, continue below */
3705 size = h1m->curr_len;
3706 break;
3707 }
3708
3709 /* we have in <size> the exact number of bytes we need to copy from
3710 * the H1 buffer. We need to check this against the connection's and
3711 * the stream's send windows, and to ensure that this fits in the max
3712 * frame size and in the buffer's available space minus 9 bytes (for
3713 * the frame header). The connection's flow control is applied last so
3714 * that we can use a separate list of streams which are immediately
3715 * unblocked on window opening. Note: we don't implement padding.
3716 */
3717
Willy Tarreau5dd17352018-06-14 13:33:30 +02003718 if (size > max)
3719 size = max;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003720
3721 if (size > h2s->mws)
3722 size = h2s->mws;
3723
3724 if (size <= 0) {
3725 h2s->flags |= H2_SF_BLK_SFCTL;
Olivier Houcharddddfe312018-10-10 18:51:00 +02003726 if (h2s->send_wait) {
3727 LIST_DEL(&h2s->list);
3728 LIST_INIT(&h2s->list);
3729 }
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003730 goto end;
3731 }
3732
3733 if (h2c->mfs && size > h2c->mfs)
3734 size = h2c->mfs;
3735
3736 if (size + 9 > outbuf.size) {
3737 /* we have an opportunity for enlarging the too small
3738 * available space, let's try.
3739 */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003740 if (b_space_wraps(&h2c->mbuf))
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003741 goto realign_again;
3742 size = outbuf.size - 9;
3743 }
3744
3745 if (size <= 0) {
3746 h2c->flags |= H2_CF_MUX_MFULL;
3747 h2s->flags |= H2_SF_BLK_MROOM;
3748 goto end;
3749 }
3750
3751 if (size > h2c->mws)
3752 size = h2c->mws;
3753
3754 if (size <= 0) {
3755 h2s->flags |= H2_SF_BLK_MFCTL;
3756 goto end;
3757 }
3758
3759 /* copy whatever we can */
3760 blk1 = blk2 = NULL; // silence a maybe-uninitialized warning
Willy Tarreau5dd17352018-06-14 13:33:30 +02003761 ret = b_getblk_nc(buf, &blk1, &len1, &blk2, &len2, ofs, max);
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003762 if (ret == 1)
3763 len2 = 0;
3764
3765 if (!ret || len1 + len2 < size) {
3766 /* FIXME: must normally never happen */
3767 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
3768 goto end;
3769 }
3770
3771 /* limit len1/len2 to size */
3772 if (len1 + len2 > size) {
3773 int sub = len1 + len2 - size;
3774
3775 if (len2 > sub)
3776 len2 -= sub;
3777 else {
3778 sub -= len2;
3779 len2 = 0;
3780 len1 -= sub;
3781 }
3782 }
3783
3784 /* now let's copy this this into the output buffer */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003785 memcpy(outbuf.area + 9, blk1, len1);
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003786 if (len2)
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003787 memcpy(outbuf.area + 9 + len1, blk2, len2);
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003788
3789 send_empty:
3790 /* we may need to add END_STREAM */
3791 /* FIXME: we should also detect shutdown(w) below, but how ? Maybe we
3792 * could rely on the MSG_MORE flag as a hint for this ?
Willy Tarreau00610962018-07-19 10:58:28 +02003793 *
3794 * FIXME: what we do here is not correct because we send end_stream
3795 * before knowing if we'll have to send a HEADERS frame for the
3796 * trailers. More importantly we're not consuming the trailing CRLF
3797 * after the end of trailers, so it will be left to the caller to
3798 * eat it. The right way to do it would be to measure trailers here
3799 * and to send ES only if there are no trailers.
3800 *
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003801 */
3802 if (((h1m->flags & H1_MF_CLEN) && !(h1m->curr_len - size)) ||
Willy Tarreau801250e2018-09-11 11:45:04 +02003803 !h1m->curr_len || h1m->state >= H1_MSG_DONE)
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003804 es_now = 1;
3805
3806 /* update the frame's size */
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003807 h2_set_frame_size(outbuf.area, size);
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003808
3809 if (es_now)
Willy Tarreau843b7cb2018-07-13 10:54:26 +02003810 outbuf.area[4] |= H2_F_DATA_END_STREAM;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003811
3812 /* commit the H2 response */
Willy Tarreauc9fa0482018-07-10 17:43:27 +02003813 b_add(&h2c->mbuf, size + 9);
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003814
3815 /* consume incoming H1 response */
3816 if (size > 0) {
Willy Tarreau5dd17352018-06-14 13:33:30 +02003817 max -= size;
3818 ofs += size;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003819 total += size;
3820 h1m->curr_len -= size;
3821 h2s->mws -= size;
3822 h2c->mws -= size;
3823
3824 if (size && !h1m->curr_len && (h1m->flags & H1_MF_CHNK)) {
Willy Tarreau801250e2018-09-11 11:45:04 +02003825 h1m->state = H1_MSG_CHUNK_CRLF;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003826 goto new_frame;
3827 }
3828 }
3829
3830 if (es_now) {
3831 if (h2s->st == H2_SS_OPEN)
3832 h2s->st = H2_SS_HLOC;
3833 else
Willy Tarreau00dd0782018-03-01 16:31:34 +01003834 h2s_close(h2s);
Willy Tarreau9d89ac82017-10-31 17:15:59 +01003835
Willy Tarreau35a62702018-02-27 15:37:25 +01003836 if (!(h1m->flags & H1_MF_CHNK)) {
3837 // trim any possibly pending data (eg: inconsistent content-length)
Willy Tarreau5dd17352018-06-14 13:33:30 +02003838 total += max;
3839 ofs += max;
3840 max = 0;
Willy Tarreau35a62702018-02-27 15:37:25 +01003841
Willy Tarreau801250e2018-09-11 11:45:04 +02003842 h1m->state = H1_MSG_DONE;
Willy Tarreau35a62702018-02-27 15:37:25 +01003843 }
Willy Tarreau9d89ac82017-10-31 17:15:59 +01003844
Willy Tarreauc652dbd2017-10-19 11:16:37 +02003845 h2s->flags |= H2_SF_ES_SENT;
3846 }
3847
3848 end:
Dirkjan Bussinkc26c72d2018-09-14 14:30:25 +02003849 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 +02003850 return total;
3851}
3852
Willy Tarreau115e83b2018-12-01 19:17:53 +01003853/* Try to send a HEADERS frame matching HTX response present in HTX message
3854 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
3855 * must check the stream's status to detect any error which might have happened
3856 * subsequently to a successful send. The htx blocks are automatically removed
3857 * from the message. The htx message is assumed to be valid since produced from
3858 * the internal code, hence it contains a start line, an optional series of
3859 * header blocks and an end of header, otherwise an invalid frame could be
3860 * emitted and the resulting htx message could be left in an inconsistent state.
3861 */
3862static size_t h2s_htx_frt_make_resp_headers(struct h2s *h2s, struct htx *htx)
3863{
3864 struct http_hdr list[MAX_HTTP_HDR];
3865 struct h2c *h2c = h2s->h2c;
3866 struct htx_blk *blk;
3867 struct htx_blk *blk_end;
3868 struct buffer outbuf;
3869 struct htx_sl *sl;
3870 enum htx_blk_type type;
3871 int es_now = 0;
3872 int ret = 0;
3873 int hdr;
3874 int idx;
3875
3876 if (h2c_mux_busy(h2c, h2s)) {
3877 h2s->flags |= H2_SF_BLK_MBUSY;
3878 return 0;
3879 }
3880
3881 if (!h2_get_buf(h2c, &h2c->mbuf)) {
3882 h2c->flags |= H2_CF_MUX_MALLOC;
3883 h2s->flags |= H2_SF_BLK_MROOM;
3884 return 0;
3885 }
3886
3887 /* determine the first block which must not be deleted, blk_end may
3888 * be NULL if all blocks have to be deleted.
3889 */
3890 idx = htx_get_head(htx);
3891 blk_end = NULL;
3892 while (idx != -1) {
3893 type = htx_get_blk_type(htx_get_blk(htx, idx));
3894 idx = htx_get_next(htx, idx);
3895 if (type == HTX_BLK_EOH) {
3896 if (idx != -1)
3897 blk_end = htx_get_blk(htx, idx);
3898 break;
3899 }
3900 }
3901
3902 /* get the start line, we do have one */
Willy Tarreau8e162ee2018-12-06 14:07:27 +01003903 sl = htx_get_stline(htx);
Willy Tarreaue2778a42018-12-08 15:30:46 +01003904 ALREADY_CHECKED(sl);
Willy Tarreau115e83b2018-12-01 19:17:53 +01003905 h2s->status = sl->info.res.status;
Willy Tarreauaafdf582018-12-10 18:06:40 +01003906 if (h2s->status < 100 || h2s->status > 999)
3907 goto fail;
Willy Tarreau115e83b2018-12-01 19:17:53 +01003908
3909 /* and the rest of the headers, that we dump starting at header 0 */
3910 hdr = 0;
3911
Willy Tarreau8e162ee2018-12-06 14:07:27 +01003912 idx = htx_get_head(htx); // returns the SL that we skip
Willy Tarreau115e83b2018-12-01 19:17:53 +01003913 while ((idx = htx_get_next(htx, idx)) != -1) {
3914 blk = htx_get_blk(htx, idx);
3915 type = htx_get_blk_type(blk);
3916
3917 if (type == HTX_BLK_UNUSED)
3918 continue;
3919
3920 if (type != HTX_BLK_HDR)
3921 break;
3922
3923 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1))
3924 goto fail;
3925
3926 list[hdr].n = htx_get_blk_name(htx, blk);
3927 list[hdr].v = htx_get_blk_value(htx, blk);
Willy Tarreau115e83b2018-12-01 19:17:53 +01003928 hdr++;
3929 }
3930
3931 /* marker for end of headers */
3932 list[hdr].n = ist("");
3933
3934 if (h2s->status == 204 || h2s->status == 304) {
3935 /* no contents, claim c-len is present and set to zero */
3936 es_now = 1;
3937 }
3938
3939 chunk_reset(&outbuf);
3940
3941 while (1) {
3942 outbuf.area = b_tail(&h2c->mbuf);
3943 outbuf.size = b_contig_space(&h2c->mbuf);
3944 outbuf.data = 0;
3945
3946 if (outbuf.size >= 9 || !b_space_wraps(&h2c->mbuf))
3947 break;
3948 realign_again:
3949 b_slow_realign(&h2c->mbuf, trash.area, b_data(&h2c->mbuf));
3950 }
3951
3952 if (outbuf.size < 9)
3953 goto full;
3954
3955 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
3956 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
3957 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
3958 outbuf.data = 9;
3959
3960 /* encode status, which necessarily is the first one */
Willy Tarreauaafdf582018-12-10 18:06:40 +01003961 if (!hpack_encode_int_status(&outbuf, h2s->status)) {
Willy Tarreau115e83b2018-12-01 19:17:53 +01003962 if (b_space_wraps(&h2c->mbuf))
3963 goto realign_again;
3964 goto full;
3965 }
3966
3967 /* encode all headers, stop at empty name */
3968 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
3969 /* these ones do not exist in H2 and must be dropped. */
3970 if (isteq(list[hdr].n, ist("connection")) ||
3971 isteq(list[hdr].n, ist("proxy-connection")) ||
3972 isteq(list[hdr].n, ist("keep-alive")) ||
3973 isteq(list[hdr].n, ist("upgrade")) ||
3974 isteq(list[hdr].n, ist("transfer-encoding")))
3975 continue;
3976
3977 if (isteq(list[hdr].n, ist("")))
3978 break; // end
3979
3980 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
3981 /* output full */
3982 if (b_space_wraps(&h2c->mbuf))
3983 goto realign_again;
3984 goto full;
3985 }
3986 }
3987
3988 /* we may need to add END_STREAM.
3989 * FIXME: we should also set it when we know for sure that the
3990 * content-length is zero as well as on 204/304
3991 */
3992 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM)
3993 es_now = 1;
3994
3995 if (h2s->cs->flags & CS_FL_SHW)
3996 es_now = 1;
3997
3998 /* update the frame's size */
3999 h2_set_frame_size(outbuf.area, outbuf.data - 9);
4000
4001 if (es_now)
4002 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
4003
4004 /* commit the H2 response */
4005 b_add(&h2c->mbuf, outbuf.data);
4006 h2s->flags |= H2_SF_HEADERS_SENT;
4007
4008 /* for now we don't implemented CONTINUATION, so we wait for a
4009 * body or directly end in TRL2.
4010 */
4011 if (es_now) {
4012 h2s->flags |= H2_SF_ES_SENT;
4013 if (h2s->st == H2_SS_OPEN)
4014 h2s->st = H2_SS_HLOC;
4015 else
4016 h2s_close(h2s);
4017 }
4018
4019 /* OK we could properly deliver the response */
4020
4021 /* remove all header blocks including the EOH and compute the
4022 * corresponding size.
4023 *
4024 * FIXME: We should remove everything when es_now is set.
4025 */
4026 ret = 0;
4027 idx = htx_get_head(htx);
4028 blk = htx_get_blk(htx, idx);
4029 while (blk != blk_end) {
4030 ret += htx_get_blksz(blk);
4031 blk = htx_remove_blk(htx, blk);
4032 }
Willy Tarreauc5753ae2018-12-02 12:28:01 +01004033
4034 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM)
4035 htx_remove_blk(htx, blk_end);
Willy Tarreau115e83b2018-12-01 19:17:53 +01004036 end:
4037 return ret;
4038 full:
4039 h2c->flags |= H2_CF_MUX_MFULL;
4040 h2s->flags |= H2_SF_BLK_MROOM;
4041 ret = 0;
4042 goto end;
4043 fail:
4044 /* unparsable HTX messages, too large ones to be produced in the local
4045 * list etc go here (unrecoverable errors).
4046 */
4047 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
4048 ret = 0;
4049 goto end;
4050}
4051
Willy Tarreau80739692018-10-05 11:35:57 +02004052/* Try to send a HEADERS frame matching HTX request present in HTX message
4053 * <htx> for the H2 stream <h2s>. Returns the number of bytes sent. The caller
4054 * must check the stream's status to detect any error which might have happened
4055 * subsequently to a successful send. The htx blocks are automatically removed
4056 * from the message. The htx message is assumed to be valid since produced from
4057 * the internal code, hence it contains a start line, an optional series of
4058 * header blocks and an end of header, otherwise an invalid frame could be
4059 * emitted and the resulting htx message could be left in an inconsistent state.
4060 */
4061static size_t h2s_htx_bck_make_req_headers(struct h2s *h2s, struct htx *htx)
4062{
4063 struct http_hdr list[MAX_HTTP_HDR];
4064 struct h2c *h2c = h2s->h2c;
4065 struct htx_blk *blk;
4066 struct htx_blk *blk_end;
4067 struct buffer outbuf;
4068 struct htx_sl *sl;
4069 struct ist meth, path;
4070 enum htx_blk_type type;
4071 int es_now = 0;
4072 int ret = 0;
4073 int hdr;
4074 int idx;
4075
4076 if (h2c_mux_busy(h2c, h2s)) {
4077 h2s->flags |= H2_SF_BLK_MBUSY;
4078 return 0;
4079 }
4080
4081 if (!h2_get_buf(h2c, &h2c->mbuf)) {
4082 h2c->flags |= H2_CF_MUX_MALLOC;
4083 h2s->flags |= H2_SF_BLK_MROOM;
4084 return 0;
4085 }
4086
4087 /* determine the first block which must not be deleted, blk_end may
4088 * be NULL if all blocks have to be deleted.
4089 */
4090 idx = htx_get_head(htx);
4091 blk_end = NULL;
4092 while (idx != -1) {
4093 type = htx_get_blk_type(htx_get_blk(htx, idx));
4094 idx = htx_get_next(htx, idx);
4095 if (type == HTX_BLK_EOH) {
4096 if (idx != -1)
4097 blk_end = htx_get_blk(htx, idx);
4098 break;
4099 }
4100 }
4101
4102 /* get the start line, we do have one */
Willy Tarreau8e162ee2018-12-06 14:07:27 +01004103 sl = htx_get_stline(htx);
Willy Tarreaue2778a42018-12-08 15:30:46 +01004104 ALREADY_CHECKED(sl);
Willy Tarreau80739692018-10-05 11:35:57 +02004105 meth = htx_sl_req_meth(sl);
4106 path = htx_sl_req_uri(sl);
4107
4108 /* and the rest of the headers, that we dump starting at header 0 */
4109 hdr = 0;
4110
Willy Tarreau8e162ee2018-12-06 14:07:27 +01004111 idx = htx_get_head(htx); // returns the SL that we skip
Willy Tarreau80739692018-10-05 11:35:57 +02004112 while ((idx = htx_get_next(htx, idx)) != -1) {
4113 blk = htx_get_blk(htx, idx);
4114 type = htx_get_blk_type(blk);
4115
4116 if (type == HTX_BLK_UNUSED)
4117 continue;
4118
4119 if (type != HTX_BLK_HDR)
4120 break;
4121
4122 if (unlikely(hdr >= sizeof(list)/sizeof(list[0]) - 1))
4123 goto fail;
4124
4125 list[hdr].n = htx_get_blk_name(htx, blk);
4126 list[hdr].v = htx_get_blk_value(htx, blk);
Willy Tarreau80739692018-10-05 11:35:57 +02004127 hdr++;
4128 }
4129
4130 /* marker for end of headers */
4131 list[hdr].n = ist("");
4132
4133 chunk_reset(&outbuf);
4134
4135 while (1) {
4136 outbuf.area = b_tail(&h2c->mbuf);
4137 outbuf.size = b_contig_space(&h2c->mbuf);
4138 outbuf.data = 0;
4139
4140 if (outbuf.size >= 9 || !b_space_wraps(&h2c->mbuf))
4141 break;
4142 realign_again:
4143 b_slow_realign(&h2c->mbuf, trash.area, b_data(&h2c->mbuf));
4144 }
4145
4146 if (outbuf.size < 9)
4147 goto full;
4148
4149 /* len: 0x000000 (fill later), type: 1(HEADERS), flags: ENDH=4 */
4150 memcpy(outbuf.area, "\x00\x00\x00\x01\x04", 5);
4151 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4152 outbuf.data = 9;
4153
4154 /* encode the method, which necessarily is the first one */
Willy Tarreaubdabc3a2018-12-10 18:25:11 +01004155 if (!hpack_encode_method(&outbuf, sl->info.req.meth, meth)) {
Willy Tarreau80739692018-10-05 11:35:57 +02004156 if (b_space_wraps(&h2c->mbuf))
4157 goto realign_again;
4158 goto full;
4159 }
4160
4161 /* encode the scheme which is always "https" (or 0x86 for "http") */
Willy Tarreau7561bcb2018-12-10 19:17:06 +01004162 if (!hpack_encode_scheme(&outbuf, ist("https"))) {
4163 /* output full */
4164 if (b_space_wraps(&h2c->mbuf))
4165 goto realign_again;
4166 goto full;
4167 }
Willy Tarreau80739692018-10-05 11:35:57 +02004168
4169 /* encode the path, which necessarily is the second one */
Willy Tarreau90799812018-12-10 19:28:38 +01004170 if (!hpack_encode_path(&outbuf, path)) {
Willy Tarreau80739692018-10-05 11:35:57 +02004171 /* output full */
4172 if (b_space_wraps(&h2c->mbuf))
4173 goto realign_again;
4174 goto full;
4175 }
4176
4177 /* encode all headers, stop at empty name */
4178 for (hdr = 0; hdr < sizeof(list)/sizeof(list[0]); hdr++) {
4179 /* these ones do not exist in H2 and must be dropped. */
4180 if (isteq(list[hdr].n, ist("connection")) ||
4181 isteq(list[hdr].n, ist("proxy-connection")) ||
4182 isteq(list[hdr].n, ist("keep-alive")) ||
4183 isteq(list[hdr].n, ist("upgrade")) ||
4184 isteq(list[hdr].n, ist("transfer-encoding")))
4185 continue;
4186
4187 if (isteq(list[hdr].n, ist("")))
4188 break; // end
4189
4190 if (!hpack_encode_header(&outbuf, list[hdr].n, list[hdr].v)) {
4191 /* output full */
4192 if (b_space_wraps(&h2c->mbuf))
4193 goto realign_again;
4194 goto full;
4195 }
4196 }
4197
4198 /* we may need to add END_STREAM if we have no body :
4199 * - request already closed, or :
4200 * - no transfer-encoding, and :
4201 * - no content-length or content-length:0
4202 * Fixme: this doesn't take into account CONNECT requests.
4203 */
4204 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM)
4205 es_now = 1;
4206
4207 if (sl->flags & HTX_SL_F_BODYLESS)
4208 es_now = 1;
4209
4210 if (h2s->cs->flags & CS_FL_SHW)
4211 es_now = 1;
4212
4213 /* update the frame's size */
4214 h2_set_frame_size(outbuf.area, outbuf.data - 9);
4215
4216 if (es_now)
4217 outbuf.area[4] |= H2_F_HEADERS_END_STREAM;
4218
4219 /* commit the H2 response */
4220 b_add(&h2c->mbuf, outbuf.data);
4221 h2s->flags |= H2_SF_HEADERS_SENT;
4222 h2s->st = H2_SS_OPEN;
4223
4224 /* for now we don't implemented CONTINUATION, so we wait for a
4225 * body or directly end in TRL2.
4226 */
4227 if (es_now) {
4228 // trim any possibly pending data (eg: inconsistent content-length)
4229 h2s->flags |= H2_SF_ES_SENT;
4230 h2s->st = H2_SS_HLOC;
4231 }
4232
4233 /* remove all header blocks including the EOH and compute the
4234 * corresponding size.
4235 *
4236 * FIXME: We should remove everything when es_now is set.
4237 */
4238 ret = 0;
4239 idx = htx_get_head(htx);
4240 blk = htx_get_blk(htx, idx);
4241 while (blk != blk_end) {
4242 ret += htx_get_blksz(blk);
4243 blk = htx_remove_blk(htx, blk);
4244 }
4245
4246 if (blk_end && htx_get_blk_type(blk_end) == HTX_BLK_EOM)
4247 htx_remove_blk(htx, blk_end);
4248
4249 end:
4250 return ret;
4251 full:
4252 h2c->flags |= H2_CF_MUX_MFULL;
4253 h2s->flags |= H2_SF_BLK_MROOM;
4254 ret = 0;
4255 goto end;
4256 fail:
4257 /* unparsable HTX messages, too large ones to be produced in the local
4258 * list etc go here (unrecoverable errors).
4259 */
4260 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
4261 ret = 0;
4262 goto end;
4263}
4264
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004265/* Try to send a DATA frame matching HTTP response present in HTX structure
Willy Tarreau98de12a2018-12-12 07:03:00 +01004266 * present in <buf>, for stream <h2s>. Returns the number of bytes sent. The
4267 * caller must check the stream's status to detect any error which might have
4268 * happened subsequently to a successful send. Returns the number of data bytes
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004269 * consumed, or zero if nothing done. Note that EOD/EOM count for 1 byte.
4270 */
Willy Tarreau98de12a2018-12-12 07:03:00 +01004271static size_t h2s_htx_frt_make_resp_data(struct h2s *h2s, struct buffer *buf, size_t count)
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004272{
4273 struct h2c *h2c = h2s->h2c;
Willy Tarreau98de12a2018-12-12 07:03:00 +01004274 struct htx *htx;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004275 struct buffer outbuf;
4276 size_t total = 0;
4277 int es_now = 0;
4278 int bsize; /* htx block size */
4279 int fsize; /* h2 frame size */
4280 struct htx_blk *blk;
4281 enum htx_blk_type type;
4282 int idx;
4283
4284 if (h2c_mux_busy(h2c, h2s)) {
4285 h2s->flags |= H2_SF_BLK_MBUSY;
4286 goto end;
4287 }
4288
4289 if (!h2_get_buf(h2c, &h2c->mbuf)) {
4290 h2c->flags |= H2_CF_MUX_MALLOC;
4291 h2s->flags |= H2_SF_BLK_MROOM;
4292 goto end;
4293 }
4294
Willy Tarreau98de12a2018-12-12 07:03:00 +01004295 htx = htx_from_buf(buf);
4296
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004297 /* We only come here with HTX_BLK_DATA or HTX_BLK_EOD blocks. However,
4298 * while looping, we can meet an HTX_BLK_EOM block that we'll leave to
4299 * the caller to handle.
4300 */
4301
4302 new_frame:
Willy Tarreauee573762018-12-04 15:25:57 +01004303 if (!count || htx_is_empty(htx))
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004304 goto end;
4305
4306 idx = htx_get_head(htx);
4307 blk = htx_get_blk(htx, idx);
4308 type = htx_get_blk_type(blk); // DATA or EOD or EOM
4309 bsize = htx_get_blksz(blk);
4310 fsize = bsize;
4311
4312 if (type == HTX_BLK_EOD) {
4313 /* if we have an EOD, we're dealing with chunked data. We may
4314 * have a set of trailers after us that the caller will want to
4315 * deal with. Let's simply remove the EOD and return.
4316 */
4317 htx_remove_blk(htx, blk);
Willy Tarreauee573762018-12-04 15:25:57 +01004318 total++; // EOD counts as one byte
4319 count--;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004320 goto end;
4321 }
4322
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01004323 if (type != HTX_BLK_DATA && type != HTX_BLK_EOM)
4324 goto end;
Willy Tarreau98de12a2018-12-12 07:03:00 +01004325
4326 /* Perform some optimizations to reduce the number of buffer copies.
4327 * First, if the mux's buffer is empty and the htx area contains
4328 * exactly one data block of the same size as the requested count, and
4329 * this count fits within the frame size, the stream's window size, and
4330 * the connection's window size, then it's possible to simply swap the
4331 * caller's buffer with the mux's output buffer and adjust offsets and
4332 * length to match the entire DATA HTX block in the middle. In this
4333 * case we perform a true zero-copy operation from end-to-end. This is
4334 * the situation that happens all the time with large files. Second, if
4335 * this is not possible, but the mux's output buffer is empty, we still
4336 * have an opportunity to avoid the copy to the intermediary buffer, by
4337 * making the intermediary buffer's area point to the output buffer's
4338 * area. In this case we want to skip the HTX header to make sure that
4339 * copies remain aligned and that this operation remains possible all
4340 * the time. This goes for headers, data blocks and any data extracted
4341 * from the HTX blocks.
4342 */
4343 if (unlikely(fsize == count &&
4344 htx->used == 1 && type == HTX_BLK_DATA &&
4345 fsize <= h2s->mws && fsize <= h2c->mws && fsize <= h2c->mfs)) {
4346 void *old_area = h2c->mbuf.area;
4347
4348 if (b_data(&h2c->mbuf)) {
4349 /* too bad there are data left there. If we have less
4350 * than 1/4 of the mbuf's size and everything fits,
4351 * we'll perform a copy anyway. Otherwise we'll pretend
4352 * the mbuf is full and wait.
4353 */
4354 if (fsize <= b_size(&h2c->mbuf) / 4 && fsize + 9 <= b_room(&h2c->mbuf))
4355 goto copy;
4356 h2c->flags |= H2_CF_MUX_MFULL;
4357 h2s->flags |= H2_SF_BLK_MROOM;
4358 goto end;
4359 }
4360
4361 /* map an H2 frame to the HTX block so that we can put the
4362 * frame header there.
4363 */
4364 h2c->mbuf.area = buf->area;
Olivier Houchard84cca662018-12-14 16:28:08 +01004365 h2c->mbuf.head = sizeof(struct htx) + blk->addr - 9;
Willy Tarreau98de12a2018-12-12 07:03:00 +01004366 h2c->mbuf.data = fsize + 9;
4367 outbuf.area = b_head(&h2c->mbuf);
4368
4369 /* prepend an H2 DATA frame header just before the DATA block */
4370 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
4371 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4372 h2_set_frame_size(outbuf.area, fsize);
4373
4374 /* update windows */
4375 h2s->mws -= fsize;
4376 h2c->mws -= fsize;
4377
4378 /* and exchange with our old area */
4379 buf->area = old_area;
4380 buf->data = buf->head = 0;
4381 total += fsize;
4382 goto end;
4383 }
Willy Tarreau2fb1d4c2018-12-04 15:28:03 +01004384
Willy Tarreau98de12a2018-12-12 07:03:00 +01004385 copy:
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004386 /* for DATA and EOM we'll have to emit a frame, even if empty */
4387
4388 while (1) {
4389 outbuf.area = b_tail(&h2c->mbuf);
4390 outbuf.size = b_contig_space(&h2c->mbuf);
4391 outbuf.data = 0;
4392
4393 if (outbuf.size >= 9 || !b_space_wraps(&h2c->mbuf))
4394 break;
4395 realign_again:
4396 b_slow_realign(&h2c->mbuf, trash.area, b_data(&h2c->mbuf));
4397 }
4398
4399 if (outbuf.size < 9) {
4400 h2c->flags |= H2_CF_MUX_MFULL;
4401 h2s->flags |= H2_SF_BLK_MROOM;
4402 goto end;
4403 }
4404
4405 /* len: 0x000000 (fill later), type: 0(DATA), flags: none=0 */
4406 memcpy(outbuf.area, "\x00\x00\x00\x00\x00", 5);
4407 write_n32(outbuf.area + 5, h2s->id); // 4 bytes
4408 outbuf.data = 9;
4409
4410 /* we have in <fsize> the exact number of bytes we need to copy from
4411 * the HTX buffer. We need to check this against the connection's and
4412 * the stream's send windows, and to ensure that this fits in the max
4413 * frame size and in the buffer's available space minus 9 bytes (for
4414 * the frame header). The connection's flow control is applied last so
4415 * that we can use a separate list of streams which are immediately
4416 * unblocked on window opening. Note: we don't implement padding.
4417 */
4418
4419 /* EOM is presented with bsize==1 but would lead to the emission of an
4420 * empty frame, thus we force it to zero here.
4421 */
4422 if (type == HTX_BLK_EOM)
4423 bsize = fsize = 0;
4424
4425 if (!fsize)
4426 goto send_empty;
4427
4428 if (h2s->mws <= 0) {
4429 h2s->flags |= H2_SF_BLK_SFCTL;
4430 if (h2s->send_wait) {
4431 LIST_DEL(&h2s->list);
4432 LIST_INIT(&h2s->list);
4433 }
4434 goto end;
4435 }
4436
Willy Tarreauee573762018-12-04 15:25:57 +01004437 if (fsize > count)
4438 fsize = count;
4439
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004440 if (fsize > h2s->mws)
4441 fsize = h2s->mws; // >0
4442
4443 if (h2c->mfs && fsize > h2c->mfs)
4444 fsize = h2c->mfs; // >0
4445
4446 if (fsize + 9 > outbuf.size) {
4447 /* we have an opportunity for enlarging the too small
4448 * available space, let's try.
4449 * FIXME: is this really interesting to do? Maybe we'll
4450 * spend lots of time realigning instead of using two
4451 * frames.
4452 */
4453 if (b_space_wraps(&h2c->mbuf))
4454 goto realign_again;
4455 fsize = outbuf.size - 9;
4456
4457 if (fsize <= 0) {
4458 /* no need to send an empty frame here */
4459 h2c->flags |= H2_CF_MUX_MFULL;
4460 h2s->flags |= H2_SF_BLK_MROOM;
4461 goto end;
4462 }
4463 }
4464
4465 if (h2c->mws <= 0) {
4466 h2s->flags |= H2_SF_BLK_MFCTL;
4467 goto end;
4468 }
4469
4470 if (fsize > h2c->mws)
4471 fsize = h2c->mws;
4472
4473 /* now let's copy this this into the output buffer */
4474 memcpy(outbuf.area + 9, htx_get_blk_ptr(htx, blk), fsize);
Willy Tarreau0f799ca2018-12-04 15:20:11 +01004475 h2s->mws -= fsize;
4476 h2c->mws -= fsize;
Willy Tarreauee573762018-12-04 15:25:57 +01004477 count -= fsize;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004478
4479 send_empty:
4480 /* update the frame's size */
4481 h2_set_frame_size(outbuf.area, fsize);
4482
4483 /* FIXME: for now we only set the ES flag on empty DATA frames, once
4484 * meeting EOM. We should optimize this later.
4485 */
4486 if (type == HTX_BLK_EOM) {
Willy Tarreauee573762018-12-04 15:25:57 +01004487 total++; // EOM counts as one byte
4488 count--;
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004489 es_now = 1;
4490 }
4491
4492 if (es_now)
4493 outbuf.area[4] |= H2_F_DATA_END_STREAM;
4494
4495 /* commit the H2 response */
4496 b_add(&h2c->mbuf, fsize + 9);
4497
4498 /* consume incoming HTX block, including EOM */
4499 total += fsize;
4500 if (fsize == bsize) {
4501 htx_remove_blk(htx, blk);
4502 if (fsize)
4503 goto new_frame;
4504 } else {
4505 /* we've truncated this block */
4506 htx_cut_data_blk(htx, blk, fsize);
4507 }
4508
4509 if (es_now) {
4510 if (h2s->st == H2_SS_OPEN)
4511 h2s->st = H2_SS_HLOC;
4512 else
4513 h2s_close(h2s);
4514
4515 h2s->flags |= H2_SF_ES_SENT;
4516 }
4517
4518 end:
4519 return total;
4520}
4521
Olivier Houchard6ff20392018-07-17 18:46:31 +02004522/* Called from the upper layer, to subscribe to events, such as being able to send */
4523static int h2_subscribe(struct conn_stream *cs, int event_type, void *param)
4524{
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004525 struct wait_event *sw;
Olivier Houchard6ff20392018-07-17 18:46:31 +02004526 struct h2s *h2s = cs->ctx;
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02004527 struct h2c *h2c = h2s->h2c;
Olivier Houchard6ff20392018-07-17 18:46:31 +02004528
Olivier Houchard83a0cd82018-09-28 17:57:58 +02004529 if (event_type & SUB_CAN_RECV) {
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02004530 sw = param;
4531 if (!(sw->wait_reason & SUB_CAN_RECV)) {
4532 sw->wait_reason |= SUB_CAN_RECV;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004533 sw->handle = h2s;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004534 h2s->recv_wait = sw;
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02004535 }
Olivier Houchard83a0cd82018-09-28 17:57:58 +02004536 event_type &= ~SUB_CAN_RECV;
4537 }
4538 if (event_type & SUB_CAN_SEND) {
Olivier Houchard6ff20392018-07-17 18:46:31 +02004539 sw = param;
Olivier Houchard4cf7fb12018-08-02 19:23:05 +02004540 if (!(sw->wait_reason & SUB_CAN_SEND)) {
Olivier Houcharde1c6dbc2018-08-01 17:06:43 +02004541 sw->wait_reason |= SUB_CAN_SEND;
Olivier Houchard8ae735d2018-09-11 18:24:28 +02004542 sw->handle = h2s;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004543 h2s->send_wait = sw;
4544 if (!(h2s->flags & H2_SF_BLK_SFCTL)) {
4545 if (h2s->flags & H2_SF_BLK_MFCTL)
4546 LIST_ADDQ(&h2c->fctl_list, &h2s->list);
4547 else
4548 LIST_ADDQ(&h2c->send_list, &h2s->list);
4549 }
Olivier Houcharde1c6dbc2018-08-01 17:06:43 +02004550 }
Olivier Houchard83a0cd82018-09-28 17:57:58 +02004551 event_type &= ~SUB_CAN_SEND;
Olivier Houchard6ff20392018-07-17 18:46:31 +02004552 }
Olivier Houchard83a0cd82018-09-28 17:57:58 +02004553 if (event_type != 0)
4554 return -1;
4555 return 0;
Olivier Houchard6ff20392018-07-17 18:46:31 +02004556
4557
4558}
4559
Olivier Houchard83a0cd82018-09-28 17:57:58 +02004560static int h2_unsubscribe(struct conn_stream *cs, int event_type, void *param)
4561{
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004562 struct wait_event *sw;
Olivier Houchard83a0cd82018-09-28 17:57:58 +02004563 struct h2s *h2s = cs->ctx;
4564
4565 if (event_type & SUB_CAN_RECV) {
4566 sw = param;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004567 if (h2s->recv_wait == sw) {
Olivier Houchard83a0cd82018-09-28 17:57:58 +02004568 sw->wait_reason &= ~SUB_CAN_RECV;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004569 h2s->recv_wait = NULL;
Olivier Houchard83a0cd82018-09-28 17:57:58 +02004570 }
4571 }
4572 if (event_type & SUB_CAN_SEND) {
4573 sw = param;
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004574 if (h2s->send_wait == sw) {
4575 LIST_DEL(&h2s->list);
4576 LIST_INIT(&h2s->list);
4577 sw->wait_reason &= ~SUB_CAN_SEND;
4578 h2s->send_wait = NULL;
Olivier Houchard83a0cd82018-09-28 17:57:58 +02004579 }
4580 }
Olivier Houchardd846c262018-10-19 17:24:29 +02004581 if (event_type & SUB_CALL_UNSUBSCRIBE) {
4582 sw = param;
4583 if (h2s->send_wait == sw) {
4584 sw->wait_reason &= ~SUB_CALL_UNSUBSCRIBE;
4585 h2s->send_wait = NULL;
4586 }
4587 }
Olivier Houchard83a0cd82018-09-28 17:57:58 +02004588 return 0;
4589}
4590
4591
Olivier Houchard511efea2018-08-16 15:30:32 +02004592/* Called from the upper layer, to receive data */
4593static size_t h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
4594{
Olivier Houchard638b7992018-08-16 15:41:52 +02004595 struct h2s *h2s = cs->ctx;
Willy Tarreau082f5592018-11-25 08:03:32 +01004596 struct h2c *h2c = h2s->h2c;
Willy Tarreau86724e22018-12-01 23:19:43 +01004597 struct htx *h2s_htx = NULL;
4598 struct htx *buf_htx = NULL;
4599 struct htx_ret htx_ret;
Olivier Houchard511efea2018-08-16 15:30:32 +02004600 size_t ret = 0;
4601
4602 /* transfer possibly pending data to the upper layer */
Willy Tarreau86724e22018-12-01 23:19:43 +01004603 if (h2c->proxy->options2 & PR_O2_USE_HTX) {
4604 /* in HTX mode we ignore the count argument */
4605 h2s_htx = htx_from_buf(&h2s->rxbuf);
Olivier Houchard56b03482018-12-10 16:09:53 +01004606 if (htx_is_empty(h2s_htx)) {
4607 if (cs->flags & CS_FL_REOS)
4608 cs->flags |= CS_FL_EOS;
Olivier Houchard71748cb2018-12-17 14:16:46 +01004609 if (cs->flags & CS_FL_ERR_PENDING)
4610 cs->flags |= CS_FL_ERROR;
Willy Tarreau86724e22018-12-01 23:19:43 +01004611 goto end;
Olivier Houchard56b03482018-12-10 16:09:53 +01004612 }
Willy Tarreau86724e22018-12-01 23:19:43 +01004613
4614 buf_htx = htx_from_buf(buf);
4615 count = htx_free_space(buf_htx);
4616
Willy Tarreau0c22fa72018-12-04 15:21:35 +01004617 htx_ret = htx_xfer_blks(buf_htx, h2s_htx, count, HTX_BLK_EOM);
Willy Tarreau86724e22018-12-01 23:19:43 +01004618
4619 buf_htx->extra = h2s_htx->extra;
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004620 htx_to_buf(buf_htx, buf);
4621 htx_to_buf(h2s_htx, &h2s->rxbuf);
Willy Tarreau86724e22018-12-01 23:19:43 +01004622 ret = htx_ret.ret;
4623 }
4624 else {
4625 ret = b_xfer(buf, &h2s->rxbuf, count);
4626 }
Olivier Houchard511efea2018-08-16 15:30:32 +02004627
Olivier Houchard638b7992018-08-16 15:41:52 +02004628 if (b_data(&h2s->rxbuf))
Olivier Houchardd247be02018-12-06 16:22:29 +01004629 cs->flags |= (CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02004630 else {
Olivier Houchardd247be02018-12-06 16:22:29 +01004631 cs->flags &= ~(CS_FL_RCV_MORE | CS_FL_WANT_ROOM);
Olivier Houchard511efea2018-08-16 15:30:32 +02004632 if (cs->flags & CS_FL_REOS)
4633 cs->flags |= CS_FL_EOS;
Olivier Houchard71748cb2018-12-17 14:16:46 +01004634 if (cs->flags & CS_FL_ERR_PENDING)
4635 cs->flags |= CS_FL_ERROR;
Olivier Houchard638b7992018-08-16 15:41:52 +02004636 if (b_size(&h2s->rxbuf)) {
4637 b_free(&h2s->rxbuf);
4638 offer_buffers(NULL, tasks_run_queue);
4639 }
Olivier Houchard511efea2018-08-16 15:30:32 +02004640 }
4641
Willy Tarreau082f5592018-11-25 08:03:32 +01004642 if (ret && h2c->dsi == h2s->id) {
4643 /* demux is blocking on this stream's buffer */
4644 h2c->flags &= ~H2_CF_DEM_SFULL;
Willy Tarreauc5b10042018-12-18 10:27:18 +01004645 if (b_data(&h2c->dbuf) || !(h2c->wait_event.wait_reason & SUB_CAN_RECV)) {
Willy Tarreau082f5592018-11-25 08:03:32 +01004646 if (h2_recv_allowed(h2c))
4647 tasklet_wakeup(h2c->wait_event.task);
4648 }
4649 }
Willy Tarreau86724e22018-12-01 23:19:43 +01004650end:
Olivier Houchard511efea2018-08-16 15:30:32 +02004651 return ret;
4652}
4653
Olivier Houchardd846c262018-10-19 17:24:29 +02004654static void h2_stop_senders(struct h2c *h2c)
4655{
4656 struct h2s *h2s, *h2s_back;
4657
4658 list_for_each_entry_safe(h2s, h2s_back, &h2c->sending_list, list) {
4659 /* Don't unschedule the stream if the mux is just busy waiting for more data fro mthat stream */
4660 if (h2c->msi == h2s_id(h2s))
4661 continue;
4662 LIST_DEL(&h2s->list);
4663 LIST_INIT(&h2s->list);
4664 task_remove_from_task_list((struct task *)h2s->send_wait->task);
4665 h2s->send_wait->wait_reason |= SUB_CAN_SEND;
4666 h2s->send_wait->wait_reason &= ~SUB_CALL_UNSUBSCRIBE;
4667 LIST_ADD(&h2c->send_list, &h2s->list);
4668 }
4669}
4670
Willy Tarreau62f52692017-10-08 23:01:42 +02004671/* Called from the upper layer, to send data */
Christopher Fauletd44a9b32018-07-27 11:59:41 +02004672static size_t h2_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t count, int flags)
Willy Tarreau62f52692017-10-08 23:01:42 +02004673{
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004674 struct h2s *h2s = cs->ctx;
Olivier Houchard8122a8d2018-12-03 19:13:29 +01004675 size_t orig_count = count;
Willy Tarreau1dc41e72018-06-14 13:21:28 +02004676 size_t total = 0;
Willy Tarreau5dd17352018-06-14 13:33:30 +02004677 size_t ret;
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01004678 struct htx *htx;
4679 struct htx_blk *blk;
4680 enum htx_blk_type btype;
4681 uint32_t bsize;
4682 int32_t idx;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004683
Olivier Houchardd846c262018-10-19 17:24:29 +02004684 if (h2s->send_wait) {
4685 h2s->send_wait->wait_reason &= ~SUB_CALL_UNSUBSCRIBE;
4686 h2s->send_wait = NULL;
4687 LIST_DEL(&h2s->list);
4688 LIST_INIT(&h2s->list);
4689 }
Willy Tarreau6bf641a2018-10-08 09:43:03 +02004690 if (h2s->h2c->st0 < H2_CS_FRAME_H)
4691 return 0;
4692
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01004693 /* htx will be enough to decide if we're using HTX or legacy */
4694 htx = (h2s->h2c->proxy->options2 & PR_O2_USE_HTX) ? htx_from_buf(buf) : NULL;
4695
Willy Tarreau0bad0432018-06-14 16:54:01 +02004696 if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count)
Willy Tarreauc4312d32017-11-07 12:01:53 +01004697 h2s->flags |= H2_SF_OUTGOING_DATA;
4698
Willy Tarreau751f2d02018-10-05 09:35:00 +02004699 if (h2s->id == 0) {
4700 int32_t id = h2c_get_next_sid(h2s->h2c);
4701
4702 if (id < 0) {
4703 cs->ctx = NULL;
4704 cs->flags |= CS_FL_ERROR;
4705 h2s_destroy(h2s);
4706 return 0;
4707 }
4708
4709 eb32_delete(&h2s->by_id);
4710 h2s->by_id.key = h2s->id = id;
4711 h2s->h2c->max_id = id;
4712 eb32_insert(&h2s->h2c->streams_by_id, &h2s->by_id);
4713 }
4714
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01004715 if (htx) {
Willy Tarreauc14999b2018-12-06 14:09:09 +01004716 while (h2s->st < H2_SS_ERROR && !(h2s->flags & H2_SF_BLK_ANY) &&
4717 count && !htx_is_empty(htx)) {
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01004718 idx = htx_get_head(htx);
4719 blk = htx_get_blk(htx, idx);
4720 btype = htx_get_blk_type(blk);
4721 bsize = htx_get_blksz(blk);
4722
4723 switch (btype) {
Willy Tarreau80739692018-10-05 11:35:57 +02004724 case HTX_BLK_REQ_SL:
4725 /* start-line before headers */
4726 ret = h2s_htx_bck_make_req_headers(h2s, htx);
4727 if (ret > 0) {
4728 total += ret;
4729 count -= ret;
4730 if (ret < bsize)
4731 goto done;
4732 }
4733 break;
4734
Willy Tarreau115e83b2018-12-01 19:17:53 +01004735 case HTX_BLK_RES_SL:
4736 /* start-line before headers */
4737 ret = h2s_htx_frt_make_resp_headers(h2s, htx);
4738 if (ret > 0) {
4739 total += ret;
4740 count -= ret;
4741 if (ret < bsize)
4742 goto done;
4743 }
4744 break;
4745
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004746 case HTX_BLK_DATA:
4747 case HTX_BLK_EOD:
4748 case HTX_BLK_EOM:
4749 /* all these cause the emission of a DATA frame (possibly empty) */
Willy Tarreau98de12a2018-12-12 07:03:00 +01004750 ret = h2s_htx_frt_make_resp_data(h2s, buf, count);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004751 if (ret > 0) {
Willy Tarreau98de12a2018-12-12 07:03:00 +01004752 htx = htx_from_buf(buf);
Willy Tarreau0c535fd2018-12-01 19:25:56 +01004753 total += ret;
4754 count -= ret;
4755 if (ret < bsize)
4756 goto done;
4757 }
4758 break;
4759
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01004760 default:
4761 htx_remove_blk(htx, blk);
4762 total += bsize;
4763 count -= bsize;
4764 break;
4765 }
4766 }
4767 goto done;
4768 }
4769
4770 /* legacy transfer mode */
Willy Tarreaua40704a2018-09-11 13:52:04 +02004771 while (h2s->h1m.state < H1_MSG_DONE && count) {
Willy Tarreau001823c2018-09-12 17:25:32 +02004772 if (h2s->h1m.state <= H1_MSG_LAST_LF) {
Willy Tarreau80739692018-10-05 11:35:57 +02004773 if (h2s->h2c->flags & H2_CF_IS_BACK)
4774 ret = -1;
4775 else
4776 ret = h2s_frt_make_resp_headers(h2s, buf, total, count);
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004777 }
Willy Tarreaua40704a2018-09-11 13:52:04 +02004778 else if (h2s->h1m.state < H1_MSG_TRAILERS) {
Willy Tarreau0bad0432018-06-14 16:54:01 +02004779 ret = h2s_frt_make_resp_data(h2s, buf, total, count);
Willy Tarreau9d89ac82017-10-31 17:15:59 +01004780 }
Willy Tarreaua40704a2018-09-11 13:52:04 +02004781 else if (h2s->h1m.state == H1_MSG_TRAILERS) {
Willy Tarreau9d89ac82017-10-31 17:15:59 +01004782 /* consume the trailers if any (we don't forward them for now) */
Willy Tarreau0bad0432018-06-14 16:54:01 +02004783 ret = h1_measure_trailers(buf, total, count);
Willy Tarreau9d89ac82017-10-31 17:15:59 +01004784
Willy Tarreau5dd17352018-06-14 13:33:30 +02004785 if (unlikely((int)ret <= 0)) {
4786 if ((int)ret < 0)
Willy Tarreau9d89ac82017-10-31 17:15:59 +01004787 h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
4788 break;
4789 }
Willy Tarreau35a62702018-02-27 15:37:25 +01004790 // trim any possibly pending data (eg: extra CR-LF, ...)
Willy Tarreau0bad0432018-06-14 16:54:01 +02004791 total += count;
4792 count = 0;
Willy Tarreaua40704a2018-09-11 13:52:04 +02004793 h2s->h1m.state = H1_MSG_DONE;
Willy Tarreau9d89ac82017-10-31 17:15:59 +01004794 break;
Willy Tarreauc652dbd2017-10-19 11:16:37 +02004795 }
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004796 else {
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004797 cs->flags |= CS_FL_ERROR;
4798 break;
4799 }
Willy Tarreau0bad0432018-06-14 16:54:01 +02004800
4801 total += ret;
4802 count -= ret;
4803
4804 if (h2s->st >= H2_SS_ERROR)
4805 break;
4806
4807 if (h2s->flags & H2_SF_BLK_ANY)
4808 break;
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004809 }
4810
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01004811 done:
Willy Tarreau00610962018-07-19 10:58:28 +02004812 if (h2s->st >= H2_SS_ERROR) {
4813 /* trim any possibly pending data after we close (extra CR-LF,
4814 * unprocessed trailers, abnormal extra data, ...)
4815 */
Willy Tarreau0bad0432018-06-14 16:54:01 +02004816 total += count;
4817 count = 0;
Willy Tarreau00610962018-07-19 10:58:28 +02004818 }
4819
Willy Tarreauc6795ca2017-11-07 09:43:06 +01004820 /* RST are sent similarly to frame acks */
Willy Tarreau02492192017-12-07 15:59:29 +01004821 if (h2s->st == H2_SS_ERROR || h2s->flags & H2_SF_RST_RCVD) {
Willy Tarreauc6795ca2017-11-07 09:43:06 +01004822 cs->flags |= CS_FL_ERROR;
Willy Tarreau8c0ea7d2017-11-10 10:05:24 +01004823 if (h2s_send_rst_stream(h2s->h2c, h2s) > 0)
Willy Tarreau00dd0782018-03-01 16:31:34 +01004824 h2s_close(h2s);
Willy Tarreauc6795ca2017-11-07 09:43:06 +01004825 }
4826
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01004827 if (htx) {
Christopher Faulet27ba2dc2018-12-05 11:53:24 +01004828 htx_to_buf(htx, buf);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01004829 } else {
4830 b_del(buf, total);
4831 }
Olivier Houchardd846c262018-10-19 17:24:29 +02004832
4833 /* The mux is full, cancel the pending tasks */
4834 if ((h2s->h2c->flags & H2_CF_MUX_BLOCK_ANY) ||
4835 (h2s->flags & H2_SF_BLK_MBUSY))
4836 h2_stop_senders(h2s->h2c);
Willy Tarreaubcd3bb32018-12-01 18:59:00 +01004837
Olivier Houchard8122a8d2018-12-03 19:13:29 +01004838 /* If we're running HTX, and we read the whole buffer, then pretend
4839 * we read exactly what the caller specified, as with HTX the caller
4840 * will always give the buffer size, instead of the amount of data
4841 * available.
4842 */
4843 if (htx && !b_data(buf))
4844 total = orig_count;
4845
Olivier Houchard7505f942018-08-21 18:10:44 +02004846 if (total > 0) {
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004847 if (!(h2s->h2c->wait_event.wait_reason & SUB_CAN_SEND))
4848 tasklet_wakeup(h2s->h2c->wait_event.task);
Olivier Houchardd846c262018-10-19 17:24:29 +02004849
Olivier Houchard7505f942018-08-21 18:10:44 +02004850 }
Willy Tarreau9e5ae1d2017-10-17 19:58:20 +02004851 return total;
Willy Tarreau62f52692017-10-08 23:01:42 +02004852}
4853
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02004854/* for debugging with CLI's "show fd" command */
Willy Tarreau83061a82018-07-13 11:56:34 +02004855static void h2_show_fd(struct buffer *msg, struct connection *conn)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02004856{
4857 struct h2c *h2c = conn->mux_ctx;
Willy Tarreau987c0632018-12-18 10:32:05 +01004858 struct h2s *h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02004859 struct eb32_node *node;
4860 int fctl_cnt = 0;
4861 int send_cnt = 0;
4862 int tree_cnt = 0;
4863 int orph_cnt = 0;
4864
4865 if (!h2c)
4866 return;
4867
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004868 list_for_each_entry(h2s, &h2c->fctl_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02004869 fctl_cnt++;
4870
Olivier Houchardfa8aa862018-10-10 18:25:41 +02004871 list_for_each_entry(h2s, &h2c->send_list, list)
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02004872 send_cnt++;
4873
Willy Tarreau3af37712018-12-18 14:34:41 +01004874 h2s = NULL;
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02004875 node = eb32_first(&h2c->streams_by_id);
4876 while (node) {
4877 h2s = container_of(node, struct h2s, by_id);
4878 tree_cnt++;
4879 if (!h2s->cs)
4880 orph_cnt++;
4881 node = eb32_next(node);
4882 }
4883
Willy Tarreau987c0632018-12-18 10:32:05 +01004884 chunk_appendf(msg, " h2c.st0=%d .err=%d .maxid=%d .lastid=%d .flg=0x%04x"
4885 " .nbst=%u .nbcs=%u .fctl_cnt=%d .send_cnt=%d .tree_cnt=%d"
4886 " .orph_cnt=%d .sub=%d .dsi=%d .dbuf=%u@%p+%u/%u .msi=%d .mbuf=%u@%p+%u/%u",
Willy Tarreau616ac812018-07-24 14:12:42 +02004887 h2c->st0, h2c->errcode, h2c->max_id, h2c->last_sid, h2c->flags,
4888 h2c->nb_streams, h2c->nb_cs, fctl_cnt, send_cnt, tree_cnt, orph_cnt,
Willy Tarreau987c0632018-12-18 10:32:05 +01004889 h2c->wait_event.wait_reason, h2c->dsi,
4890 (unsigned int)b_data(&h2c->dbuf), b_orig(&h2c->dbuf),
4891 (unsigned int)b_head_ofs(&h2c->dbuf), (unsigned int)b_size(&h2c->dbuf),
4892 h2c->msi,
4893 (unsigned int)b_data(&h2c->mbuf), b_orig(&h2c->mbuf),
4894 (unsigned int)b_head_ofs(&h2c->mbuf), (unsigned int)b_size(&h2c->mbuf));
4895
4896 if (h2s) {
4897 chunk_appendf(msg, " last_h2s=%p .id=%d .flg=0x%04x .rxbuf=%u@%p+%u/%u .cs=%p",
4898 h2s, h2s->id, h2s->flags,
4899 (unsigned int)b_data(&h2s->rxbuf), b_orig(&h2s->rxbuf),
4900 (unsigned int)b_head_ofs(&h2s->rxbuf), (unsigned int)b_size(&h2s->rxbuf),
4901 h2s->cs);
4902 if (h2s->cs)
4903 chunk_appendf(msg, " .cs.flg=0x%08x .cs.data=%p",
4904 h2s->cs->flags, h2s->cs->data);
4905 }
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02004906}
Willy Tarreau62f52692017-10-08 23:01:42 +02004907
4908/*******************************************************/
4909/* functions below are dedicated to the config parsers */
4910/*******************************************************/
4911
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02004912/* config parser for global "tune.h2.header-table-size" */
4913static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx,
4914 struct proxy *defpx, const char *file, int line,
4915 char **err)
4916{
4917 if (too_many_args(1, args, err, NULL))
4918 return -1;
4919
4920 h2_settings_header_table_size = atoi(args[1]);
4921 if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) {
4922 memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]);
4923 return -1;
4924 }
4925 return 0;
4926}
Willy Tarreau62f52692017-10-08 23:01:42 +02004927
Willy Tarreaue6baec02017-07-27 11:45:11 +02004928/* config parser for global "tune.h2.initial-window-size" */
4929static int h2_parse_initial_window_size(char **args, int section_type, struct proxy *curpx,
4930 struct proxy *defpx, const char *file, int line,
4931 char **err)
4932{
4933 if (too_many_args(1, args, err, NULL))
4934 return -1;
4935
4936 h2_settings_initial_window_size = atoi(args[1]);
4937 if (h2_settings_initial_window_size < 0) {
4938 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
4939 return -1;
4940 }
4941 return 0;
4942}
4943
Willy Tarreau5242ef82017-07-27 11:47:28 +02004944/* config parser for global "tune.h2.max-concurrent-streams" */
4945static int h2_parse_max_concurrent_streams(char **args, int section_type, struct proxy *curpx,
4946 struct proxy *defpx, const char *file, int line,
4947 char **err)
4948{
4949 if (too_many_args(1, args, err, NULL))
4950 return -1;
4951
4952 h2_settings_max_concurrent_streams = atoi(args[1]);
4953 if (h2_settings_max_concurrent_streams < 0) {
4954 memprintf(err, "'%s' expects a positive numeric value.", args[0]);
4955 return -1;
4956 }
4957 return 0;
4958}
4959
Willy Tarreau62f52692017-10-08 23:01:42 +02004960
4961/****************************************/
4962/* MUX initialization and instanciation */
4963/***************************************/
4964
4965/* The mux operations */
Willy Tarreau680b2bd2018-11-27 07:30:17 +01004966static const struct mux_ops h2_ops = {
Willy Tarreau62f52692017-10-08 23:01:42 +02004967 .init = h2_init,
Olivier Houchard21df6cc2018-09-14 23:21:44 +02004968 .wake = h2_wake,
Willy Tarreau62f52692017-10-08 23:01:42 +02004969 .snd_buf = h2_snd_buf,
Olivier Houchard511efea2018-08-16 15:30:32 +02004970 .rcv_buf = h2_rcv_buf,
Olivier Houchard6ff20392018-07-17 18:46:31 +02004971 .subscribe = h2_subscribe,
Olivier Houchard83a0cd82018-09-28 17:57:58 +02004972 .unsubscribe = h2_unsubscribe,
Willy Tarreau62f52692017-10-08 23:01:42 +02004973 .attach = h2_attach,
Willy Tarreaufafd3982018-11-18 21:29:20 +01004974 .get_first_cs = h2_get_first_cs,
Willy Tarreau62f52692017-10-08 23:01:42 +02004975 .detach = h2_detach,
Olivier Houchard060ed432018-11-06 16:32:42 +01004976 .destroy = h2_destroy,
Olivier Houchardd540b362018-11-05 18:37:53 +01004977 .avail_streams = h2_avail_streams,
Olivier Houchard8defe4b2018-12-02 01:31:17 +01004978 .max_streams = h2_max_streams,
Willy Tarreau62f52692017-10-08 23:01:42 +02004979 .shutr = h2_shutr,
4980 .shutw = h2_shutw,
Willy Tarreaue3f36cd2018-03-30 14:43:13 +02004981 .show_fd = h2_show_fd,
Willy Tarreau28f1cb92017-12-20 16:14:44 +01004982 .flags = MX_FL_CLEAN_ABRT,
Willy Tarreau62f52692017-10-08 23:01:42 +02004983 .name = "H2",
4984};
4985
Christopher Faulet32f61c02018-04-10 14:33:41 +02004986/* PROTO selection : this mux registers PROTO token "h2" */
4987static struct mux_proto_list mux_proto_h2 =
Willy Tarreauf8957272018-10-03 10:25:20 +02004988 { .token = IST("h2"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_FE, .mux = &h2_ops };
Willy Tarreau62f52692017-10-08 23:01:42 +02004989
Willy Tarreau0108d902018-11-25 19:14:37 +01004990INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2);
4991
Willy Tarreauf8957272018-10-03 10:25:20 +02004992static struct mux_proto_list mux_proto_h2_htx =
4993 { .token = IST("h2"), .mode = PROTO_MODE_HTX, .side = PROTO_SIDE_BOTH, .mux = &h2_ops };
4994
4995INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h2_htx);
4996
Willy Tarreau62f52692017-10-08 23:01:42 +02004997/* config keyword parsers */
4998static struct cfg_kw_list cfg_kws = {ILH, {
Willy Tarreaufe20e5b2017-07-27 11:42:14 +02004999 { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size },
Willy Tarreaue6baec02017-07-27 11:45:11 +02005000 { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size },
Willy Tarreau5242ef82017-07-27 11:47:28 +02005001 { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams },
Willy Tarreau62f52692017-10-08 23:01:42 +02005002 { 0, NULL, NULL }
5003}};
5004
Willy Tarreau0108d902018-11-25 19:14:37 +01005005INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);