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Willy Tarreaucff64112008-11-03 06:26:53 +01001/*
2 * Functions managing stream_interface structures
3 *
Willy Tarreauf873d752012-05-11 17:47:17 +02004 * Copyright 2000-2012 Willy Tarreau <w@1wt.eu>
Willy Tarreaucff64112008-11-03 06:26:53 +01005 *
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 <errno.h>
14#include <fcntl.h>
15#include <stdio.h>
16#include <stdlib.h>
17
18#include <sys/socket.h>
19#include <sys/stat.h>
20#include <sys/types.h>
21
Willy Tarreaubf883e02014-11-25 21:10:35 +010022#include <common/buffer.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010023#include <common/compat.h>
24#include <common/config.h>
25#include <common/debug.h>
26#include <common/standard.h>
27#include <common/ticks.h>
28#include <common/time.h>
29
Willy Tarreau8a8d83b2015-04-13 13:24:54 +020030#include <proto/applet.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020031#include <proto/channel.h>
Willy Tarreau8b117082012-08-06 15:06:49 +020032#include <proto/connection.h>
Olivier Houcharda254a372019-04-05 15:30:12 +020033#include <proto/http_htx.h>
Olivier Houchard9aaf7782017-09-13 18:30:23 +020034#include <proto/mux_pt.h>
Willy Tarreau96199b12012-08-24 00:46:52 +020035#include <proto/pipe.h>
Olivier Houcharda254a372019-04-05 15:30:12 +020036#include <proto/proxy.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020037#include <proto/stream.h>
Willy Tarreau269358d2009-09-20 20:14:49 +020038#include <proto/stream_interface.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010039#include <proto/task.h>
40
Willy Tarreaufd31e532012-07-23 18:24:25 +020041#include <types/pipe.h>
42
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010043/* functions used by default on a detached stream-interface */
Willy Tarreau6fe15412013-09-29 15:16:03 +020044static void stream_int_shutr(struct stream_interface *si);
45static void stream_int_shutw(struct stream_interface *si);
Willy Tarreauf873d752012-05-11 17:47:17 +020046static void stream_int_chk_rcv(struct stream_interface *si);
47static void stream_int_chk_snd(struct stream_interface *si);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010048
49/* functions used on a conn_stream-based stream-interface */
Willy Tarreau6fe15412013-09-29 15:16:03 +020050static void stream_int_shutr_conn(struct stream_interface *si);
51static void stream_int_shutw_conn(struct stream_interface *si);
Willy Tarreauc5788912012-08-24 18:12:41 +020052static void stream_int_chk_rcv_conn(struct stream_interface *si);
53static void stream_int_chk_snd_conn(struct stream_interface *si);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010054
55/* functions used on an applet-based stream-interface */
Willy Tarreaud45b9f82015-04-13 16:30:14 +020056static void stream_int_shutr_applet(struct stream_interface *si);
57static void stream_int_shutw_applet(struct stream_interface *si);
58static void stream_int_chk_rcv_applet(struct stream_interface *si);
59static void stream_int_chk_snd_applet(struct stream_interface *si);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010060
61/* last read notification */
62static void stream_int_read0(struct stream_interface *si);
63
64/* post-IO notification callback */
65static void stream_int_notify(struct stream_interface *si);
Willy Tarreauf873d752012-05-11 17:47:17 +020066
Willy Tarreauc5788912012-08-24 18:12:41 +020067/* stream-interface operations for embedded tasks */
68struct si_ops si_embedded_ops = {
Willy Tarreau5c979a92012-05-07 17:15:39 +020069 .chk_rcv = stream_int_chk_rcv,
70 .chk_snd = stream_int_chk_snd,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020071 .shutr = stream_int_shutr,
72 .shutw = stream_int_shutw,
Willy Tarreau5c979a92012-05-07 17:15:39 +020073};
74
Willy Tarreauc5788912012-08-24 18:12:41 +020075/* stream-interface operations for connections */
76struct si_ops si_conn_ops = {
Willy Tarreauc5788912012-08-24 18:12:41 +020077 .chk_rcv = stream_int_chk_rcv_conn,
78 .chk_snd = stream_int_chk_snd_conn,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020079 .shutr = stream_int_shutr_conn,
80 .shutw = stream_int_shutw_conn,
Willy Tarreauc5788912012-08-24 18:12:41 +020081};
82
Willy Tarreaud45b9f82015-04-13 16:30:14 +020083/* stream-interface operations for connections */
84struct si_ops si_applet_ops = {
Willy Tarreaud45b9f82015-04-13 16:30:14 +020085 .chk_rcv = stream_int_chk_rcv_applet,
86 .chk_snd = stream_int_chk_snd_applet,
87 .shutr = stream_int_shutr_applet,
88 .shutw = stream_int_shutw_applet,
89};
90
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010091
92/* Functions used to communicate with a conn_stream. The first two may be used
93 * directly, the last one is mostly a wake callback.
94 */
95int si_cs_recv(struct conn_stream *cs);
96int si_cs_send(struct conn_stream *cs);
97static int si_cs_process(struct conn_stream *cs);
98
99
Willy Tarreau74beec32012-10-03 00:41:04 +0200100struct data_cb si_conn_cb = {
Olivier Houchard21df6cc2018-09-14 23:21:44 +0200101 .wake = si_cs_process,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +0100102 .name = "STRM",
Willy Tarreauc5788912012-08-24 18:12:41 +0200103};
104
Willy Tarreaucff64112008-11-03 06:26:53 +0100105/*
106 * This function only has to be called once after a wakeup event in case of
107 * suspected timeout. It controls the stream interface timeouts and sets
108 * si->flags accordingly. It does NOT close anything, as this timeout may
109 * be used for any purpose. It returns 1 if the timeout fired, otherwise
110 * zero.
111 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100112int si_check_timeouts(struct stream_interface *si)
Willy Tarreaucff64112008-11-03 06:26:53 +0100113{
114 if (tick_is_expired(si->exp, now_ms)) {
115 si->flags |= SI_FL_EXP;
116 return 1;
117 }
118 return 0;
119}
120
Willy Tarreaufe3718a2008-11-30 18:14:12 +0100121/* to be called only when in SI_ST_DIS with SI_FL_ERR */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100122void si_report_error(struct stream_interface *si)
Willy Tarreaucff64112008-11-03 06:26:53 +0100123{
124 if (!si->err_type)
125 si->err_type = SI_ET_DATA_ERR;
126
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100127 si_oc(si)->flags |= CF_WRITE_ERROR;
128 si_ic(si)->flags |= CF_READ_ERROR;
Willy Tarreaucff64112008-11-03 06:26:53 +0100129}
130
131/*
Willy Tarreaudded32d2008-11-30 19:48:07 +0100132 * Returns a message to the client ; the connection is shut down for read,
133 * and the request is cleared so that no server connection can be initiated.
134 * The buffer is marked for read shutdown on the other side to protect the
135 * message, and the buffer write is enabled. The message is contained in a
Willy Tarreau148d0992010-01-10 10:21:21 +0100136 * "chunk". If it is null, then an empty message is used. The reply buffer does
137 * not need to be empty before this, and its contents will not be overwritten.
138 * The primary goal of this function is to return error messages to a client.
Willy Tarreaudded32d2008-11-30 19:48:07 +0100139 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100140void si_retnclose(struct stream_interface *si,
Willy Tarreau83061a82018-07-13 11:56:34 +0200141 const struct buffer *msg)
Willy Tarreaudded32d2008-11-30 19:48:07 +0100142{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100143 struct channel *ic = si_ic(si);
144 struct channel *oc = si_oc(si);
145
146 channel_auto_read(ic);
147 channel_abort(ic);
148 channel_auto_close(ic);
149 channel_erase(ic);
150 channel_truncate(oc);
Willy Tarreau798e1282010-12-12 13:06:00 +0100151
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200152 if (likely(msg && msg->data))
153 co_inject(oc, msg->area, msg->data);
Willy Tarreaudded32d2008-11-30 19:48:07 +0100154
Willy Tarreauafc8a222014-11-28 15:46:27 +0100155 oc->wex = tick_add_ifset(now_ms, oc->wto);
156 channel_auto_read(oc);
157 channel_auto_close(oc);
158 channel_shutr_now(oc);
Willy Tarreau5d881d02009-12-27 22:51:06 +0100159}
160
Willy Tarreau4a36b562012-08-06 19:31:45 +0200161/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200162 * This function performs a shutdown-read on a detached stream interface in a
163 * connected or init state (it does nothing for other states). It either shuts
164 * the read side or marks itself as closed. The buffer flags are updated to
165 * reflect the new state. If the stream interface has SI_FL_NOHALF, we also
166 * forward the close to the write side. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200167 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200168static void stream_int_shutr(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200169{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100170 struct channel *ic = si_ic(si);
171
Willy Tarreauabb5d422018-11-14 16:58:52 +0100172 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100173 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200174 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100175 ic->flags |= CF_SHUTR;
176 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200177
178 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200179 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200180
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100181 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200182 si->state = SI_ST_DIS;
183 si->exp = TICK_ETERNITY;
Willy Tarreaud8ccffe2010-09-07 16:16:50 +0200184 }
Willy Tarreau4a36b562012-08-06 19:31:45 +0200185 else if (si->flags & SI_FL_NOHALF) {
186 /* we want to immediately forward this close to the write side */
187 return stream_int_shutw(si);
188 }
Willy Tarreau0bd05ea2010-07-02 11:18:03 +0200189
Willy Tarreau4a36b562012-08-06 19:31:45 +0200190 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100191 if (!(si->flags & SI_FL_DONT_WAKE))
192 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200193}
194
Willy Tarreau4a36b562012-08-06 19:31:45 +0200195/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200196 * This function performs a shutdown-write on a detached stream interface in a
197 * connected or init state (it does nothing for other states). It either shuts
198 * the write side or marks itself as closed. The buffer flags are updated to
199 * reflect the new state. It does also close everything if the SI was marked as
200 * being in error state. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200201 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200202static void stream_int_shutw(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200203{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100204 struct channel *ic = si_ic(si);
205 struct channel *oc = si_oc(si);
206
207 oc->flags &= ~CF_SHUTW_NOW;
208 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200209 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100210 oc->flags |= CF_SHUTW;
211 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +0100212 si_done_get(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200213
Hongbo Longe39683c2017-03-10 18:41:51 +0100214 if (tick_isset(si->hcto)) {
215 ic->rto = si->hcto;
216 ic->rex = tick_add(now_ms, ic->rto);
217 }
218
Willy Tarreaufb90d942009-09-05 20:57:35 +0200219 switch (si->state) {
220 case SI_ST_EST:
Willy Tarreau4a36b562012-08-06 19:31:45 +0200221 /* we have to shut before closing, otherwise some short messages
222 * may never leave the system, especially when there are remaining
223 * unread data in the socket input buffer, or when nolinger is set.
224 * However, if SI_FL_NOLINGER is explicitly set, we know there is
225 * no risk so we close both sides immediately.
226 */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200227 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
Willy Tarreauafc8a222014-11-28 15:46:27 +0100228 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200229 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200230
231 /* fall through */
232 case SI_ST_CON:
233 case SI_ST_CER:
Willy Tarreau32d3ee92010-12-29 14:03:02 +0100234 case SI_ST_QUE:
235 case SI_ST_TAR:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200236 /* Note that none of these states may happen with applets */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200237 si->state = SI_ST_DIS;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200238 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +0100239 si->flags &= ~SI_FL_NOLINGER;
240 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100241 ic->flags |= CF_SHUTR;
242 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200243 si->exp = TICK_ETERNITY;
244 }
245
Willy Tarreau4a36b562012-08-06 19:31:45 +0200246 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100247 if (!(si->flags & SI_FL_DONT_WAKE))
248 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200249}
250
251/* default chk_rcv function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200252static void stream_int_chk_rcv(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200253{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100254 struct channel *ic = si_ic(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200255
Willy Tarreauafc8a222014-11-28 15:46:27 +0100256 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200257 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100258 si, si->state, ic->flags, si_oc(si)->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200259
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200260 if (ic->pipe) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200261 /* stop reading */
Willy Tarreaudb398432018-11-15 11:08:52 +0100262 si_rx_room_blk(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200263 }
264 else {
265 /* (re)start reading */
Olivier Houchard53216e72018-10-10 15:46:36 +0200266 tasklet_wakeup(si->wait_event.task);
Willy Tarreau07373b82014-11-28 12:08:47 +0100267 if (!(si->flags & SI_FL_DONT_WAKE))
268 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200269 }
270}
271
272/* default chk_snd function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200273static void stream_int_chk_snd(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200274{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100275 struct channel *oc = si_oc(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200276
Willy Tarreauafc8a222014-11-28 15:46:27 +0100277 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200278 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100279 si, si->state, si_ic(si)->flags, oc->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200280
Willy Tarreauafc8a222014-11-28 15:46:27 +0100281 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200282 return;
283
284 if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100285 channel_is_empty(oc)) /* called with nothing to send ! */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200286 return;
287
288 /* Otherwise there are remaining data to be sent in the buffer,
289 * so we tell the handler.
290 */
291 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100292 if (!tick_isset(oc->wex))
293 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200294
Willy Tarreau07373b82014-11-28 12:08:47 +0100295 if (!(si->flags & SI_FL_DONT_WAKE))
296 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200297}
298
Willy Tarreaua9ff5e62015-07-19 18:46:30 +0200299/* Register an applet to handle a stream_interface as a new appctx. The SI will
300 * wake it up everytime it is solicited. The appctx must be deleted by the task
301 * handler using si_release_endpoint(), possibly from within the function itself.
302 * It also pre-initializes the applet's context and returns it (or NULL in case
303 * it could not be allocated).
Willy Tarreaufb90d942009-09-05 20:57:35 +0200304 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100305struct appctx *si_register_handler(struct stream_interface *si, struct applet *app)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200306{
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100307 struct appctx *appctx;
308
Willy Tarreau07373b82014-11-28 12:08:47 +0100309 DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si_task(si));
Willy Tarreaufb90d942009-09-05 20:57:35 +0200310
Willy Tarreaua7513f52015-04-05 00:15:26 +0200311 appctx = si_alloc_appctx(si, app);
Willy Tarreaua69fc9f2014-12-22 19:34:00 +0100312 if (!appctx)
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100313 return NULL;
314
Willy Tarreau0cd3bd62018-11-06 18:46:37 +0100315 si_cant_get(si);
Willy Tarreau828824a2015-04-19 17:20:03 +0200316 appctx_wakeup(appctx);
Willy Tarreau1fbe1c92013-12-01 09:35:41 +0100317 return si_appctx(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200318}
319
Willy Tarreau2c6be842012-07-06 17:12:34 +0200320/* This callback is used to send a valid PROXY protocol line to a socket being
Willy Tarreauafad0e02012-08-09 14:45:22 +0200321 * established. It returns 0 if it fails in a fatal way or needs to poll to go
322 * further, otherwise it returns non-zero and removes itself from the connection's
Willy Tarreaua1a74742012-08-24 12:14:49 +0200323 * flags (the bit is provided in <flag> by the caller). It is designed to be
324 * called by the connection handler and relies on it to commit polling changes.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200325 * Note that it can emit a PROXY line by relying on the other end's address
326 * when the connection is attached to a stream interface, or by resolving the
327 * local address otherwise (also called a LOCAL line).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200328 */
329int conn_si_send_proxy(struct connection *conn, unsigned int flag)
330{
Willy Tarreau2c6be842012-07-06 17:12:34 +0200331 /* we might have been called just after an asynchronous shutw */
Willy Tarreaua1a74742012-08-24 12:14:49 +0200332 if (conn->flags & CO_FL_SOCK_WR_SH)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200333 goto out_error;
334
Willy Tarreaud02cdd22013-12-15 10:23:20 +0100335 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200336 goto out_error;
337
Willy Tarreau2c6be842012-07-06 17:12:34 +0200338 /* If we have a PROXY line to send, we'll use this to validate the
339 * connection, in which case the connection is validated only once
340 * we've sent the whole proxy line. Otherwise we use connect().
341 */
Tim Duesterhus36839dc2019-02-26 17:09:51 +0100342 if (conn->send_proxy_ofs) {
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100343 const struct conn_stream *cs;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200344 int ret;
345
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100346 cs = cs_get_first(conn);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200347 /* The target server expects a PROXY line to be sent first.
348 * If the send_proxy_ofs is negative, it corresponds to the
349 * offset to start sending from then end of the proxy string
350 * (which is recomputed every time since it's constant). If
351 * it is positive, it means we have to send from the start.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200352 * We can only send a "normal" PROXY line when the connection
353 * is attached to a stream interface. Otherwise we can only
354 * send a LOCAL line (eg: for use with health checks).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200355 */
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100356
357 if (cs && cs->data_cb == &si_conn_cb) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200358 struct stream_interface *si = cs->data;
359 struct conn_stream *remote_cs = objt_cs(si_opposite(si)->end);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200360 ret = make_proxy_line(trash.area, trash.size,
361 objt_server(conn->target),
362 remote_cs ? remote_cs->conn : NULL);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200363 }
364 else {
365 /* The target server expects a LOCAL line to be sent first. Retrieving
366 * local or remote addresses may fail until the connection is established.
367 */
368 conn_get_from_addr(conn);
369 if (!(conn->flags & CO_FL_ADDR_FROM_SET))
370 goto out_wait;
371
372 conn_get_to_addr(conn);
373 if (!(conn->flags & CO_FL_ADDR_TO_SET))
374 goto out_wait;
375
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200376 ret = make_proxy_line(trash.area, trash.size,
377 objt_server(conn->target), conn);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200378 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200379
Willy Tarreau2c6be842012-07-06 17:12:34 +0200380 if (!ret)
381 goto out_error;
382
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200383 if (conn->send_proxy_ofs > 0)
384 conn->send_proxy_ofs = -ret; /* first call */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200385
Willy Tarreaua1a74742012-08-24 12:14:49 +0200386 /* we have to send trash from (ret+sp for -sp bytes). If the
387 * data layer has a pending write, we'll also set MSG_MORE.
388 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200389 ret = conn_sock_send(conn,
390 trash.area + ret + conn->send_proxy_ofs,
391 -conn->send_proxy_ofs,
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200392 (conn->flags & CO_FL_XPRT_WR_ENA) ? MSG_MORE : 0);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200393
Willy Tarreau0a03c0f2015-03-13 00:05:28 +0100394 if (ret < 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200395 goto out_error;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200396
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200397 conn->send_proxy_ofs += ret; /* becomes zero once complete */
398 if (conn->send_proxy_ofs != 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200399 goto out_wait;
400
401 /* OK we've sent the whole line, we're connected */
402 }
403
Willy Tarreaua1a74742012-08-24 12:14:49 +0200404 /* The connection is ready now, simply return and let the connection
405 * handler notify upper layers if needed.
Willy Tarreau2c6be842012-07-06 17:12:34 +0200406 */
407 if (conn->flags & CO_FL_WAIT_L4_CONN)
408 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200409 conn->flags &= ~flag;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200410 return 1;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200411
412 out_error:
Willy Tarreauafad0e02012-08-09 14:45:22 +0200413 /* Write error on the file descriptor */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200414 conn->flags |= CO_FL_ERROR;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200415 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200416
417 out_wait:
Willy Tarreaua1a74742012-08-24 12:14:49 +0200418 __conn_sock_stop_recv(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200419 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200420}
421
Willy Tarreau27375622013-12-17 00:00:28 +0100422
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100423/* This function is the equivalent to si_update() except that it's
Willy Tarreau615f28b2015-09-23 18:40:09 +0200424 * designed to be called from outside the stream handlers, typically the lower
425 * layers (applets, connections) after I/O completion. After updating the stream
426 * interface and timeouts, it will try to forward what can be forwarded, then to
427 * wake the associated task up if an important event requires special handling.
Willy Tarreaud0f5bbc2018-11-14 11:10:26 +0100428 * It may update SI_FL_WAIT_DATA and/or SI_FL_RXBLK_ROOM, that the callers are
Willy Tarreau0dfccb22018-10-25 13:55:20 +0200429 * encouraged to watch to take appropriate action.
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100430 * It should not be called from within the stream itself, si_update()
Willy Tarreau615f28b2015-09-23 18:40:09 +0200431 * is designed for this.
432 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100433static void stream_int_notify(struct stream_interface *si)
Willy Tarreau615f28b2015-09-23 18:40:09 +0200434{
435 struct channel *ic = si_ic(si);
436 struct channel *oc = si_oc(si);
Willy Tarreau47baeb82018-11-15 07:46:57 +0100437 struct stream_interface *sio = si_opposite(si);
Christopher Fauletd7607de2019-01-03 16:24:54 +0100438 struct task *task = si_task(si);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200439
440 /* process consumer side */
441 if (channel_is_empty(oc)) {
Olivier Houcharde9bed532017-11-16 17:49:25 +0100442 struct connection *conn = objt_cs(si->end) ? objt_cs(si->end)->conn : NULL;
443
Willy Tarreau615f28b2015-09-23 18:40:09 +0200444 if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) &&
Olivier Houcharde9bed532017-11-16 17:49:25 +0100445 (si->state == SI_ST_EST) && (!conn || !(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS))))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200446 si_shutw(si);
447 oc->wex = TICK_ETERNITY;
448 }
449
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100450 /* indicate that we may be waiting for data from the output channel or
451 * we're about to close and can't expect more data if SHUTW_NOW is there.
452 */
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200453 if (!(oc->flags & (CF_SHUTW|CF_SHUTW_NOW)))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200454 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100455 else if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)
456 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200457
458 /* update OC timeouts and wake the other side up if it's waiting for room */
459 if (oc->flags & CF_WRITE_ACTIVITY) {
460 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
461 !channel_is_empty(oc))
462 if (tick_isset(oc->wex))
463 oc->wex = tick_add_ifset(now_ms, oc->wto);
464
465 if (!(si->flags & SI_FL_INDEP_STR))
466 if (tick_isset(ic->rex))
467 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreauf26c26c2018-11-12 16:11:08 +0100468 }
Willy Tarreau615f28b2015-09-23 18:40:09 +0200469
Willy Tarreau47baeb82018-11-15 07:46:57 +0100470 if ((sio->flags & SI_FL_RXBLK_ROOM) &&
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100471 ((oc->flags & CF_WRITE_PARTIAL) || channel_is_empty(oc)))
Willy Tarreaudb398432018-11-15 11:08:52 +0100472 si_rx_room_rdy(sio);
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100473
474 if (oc->flags & CF_DONT_READ)
475 si_rx_chan_blk(sio);
476 else
477 si_rx_chan_rdy(sio);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200478
479 /* Notify the other side when we've injected data into the IC that
480 * needs to be forwarded. We can do fast-forwarding as soon as there
481 * are output data, but we avoid doing this if some of the data are
482 * not yet scheduled for being forwarded, because it is very likely
483 * that it will be done again immediately afterwards once the following
Willy Tarreaud0f5bbc2018-11-14 11:10:26 +0100484 * data are parsed (eg: HTTP chunking). We only SI_FL_RXBLK_ROOM once
Willy Tarreau615f28b2015-09-23 18:40:09 +0200485 * we've emptied *some* of the output buffer, and not just when there
486 * is available room, because applets are often forced to stop before
487 * the buffer is full. We must not stop based on input data alone because
488 * an HTTP parser might need more data to complete the parsing.
489 */
490 if (!channel_is_empty(ic) &&
Willy Tarreau47baeb82018-11-15 07:46:57 +0100491 (sio->flags & SI_FL_WAIT_DATA) &&
Willy Tarreau89b6a2b2018-11-18 15:46:10 +0100492 (!(ic->flags & CF_EXPECT_MORE) || c_full(ic) || ci_data(ic) == 0 || ic->pipe)) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200493 int new_len, last_len;
494
Willy Tarreau77e478c2018-06-19 07:03:14 +0200495 last_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200496 if (ic->pipe)
497 last_len += ic->pipe->data;
498
Willy Tarreau47baeb82018-11-15 07:46:57 +0100499 si_chk_snd(sio);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200500
Willy Tarreau77e478c2018-06-19 07:03:14 +0200501 new_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200502 if (ic->pipe)
503 new_len += ic->pipe->data;
504
505 /* check if the consumer has freed some space either in the
506 * buffer or in the pipe.
507 */
Willy Tarreau47baeb82018-11-15 07:46:57 +0100508 if (new_len < last_len)
Willy Tarreaudb398432018-11-15 11:08:52 +0100509 si_rx_room_rdy(si);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200510 }
511
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100512 if (!(ic->flags & CF_DONT_READ))
513 si_rx_chan_rdy(si);
514
Willy Tarreau47baeb82018-11-15 07:46:57 +0100515 si_chk_rcv(si);
516 si_chk_rcv(sio);
517
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100518 if (si_rx_blocked(si)) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200519 ic->rex = TICK_ETERNITY;
520 }
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100521 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL)) == CF_READ_PARTIAL) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200522 /* we must re-enable reading if si_chk_snd() has freed some space */
523 if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex))
524 ic->rex = tick_add_ifset(now_ms, ic->rto);
525 }
526
527 /* wake the task up only when needed */
528 if (/* changes on the production side */
529 (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
Willy Tarreaub69f1712018-11-08 14:32:16 +0100530 (si->state != SI_ST_EST && si->state != SI_ST_CON) ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200531 (si->flags & SI_FL_ERR) ||
532 ((ic->flags & CF_READ_PARTIAL) &&
Christopher Faulet297d3e22019-03-22 14:16:14 +0100533 ((ic->flags & CF_EOI) || !ic->to_forward || sio->state != SI_ST_EST)) ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200534
535 /* changes on the consumption side */
536 (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
Willy Tarreauede3d882018-10-24 17:17:56 +0200537 ((oc->flags & CF_WRITE_ACTIVITY) &&
Willy Tarreau615f28b2015-09-23 18:40:09 +0200538 ((oc->flags & CF_SHUTW) ||
Willy Tarreau78f5ff82018-12-19 11:00:00 +0100539 (((oc->flags & CF_WAKE_WRITE) ||
540 !(oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW|CF_SHUTW))) &&
Willy Tarreau47baeb82018-11-15 07:46:57 +0100541 (sio->state != SI_ST_EST ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200542 (channel_is_empty(oc) && !oc->to_forward)))))) {
Christopher Fauletd7607de2019-01-03 16:24:54 +0100543 task_wakeup(task, TASK_WOKEN_IO);
544 }
545 else {
546 /* Update expiration date for the task and requeue it */
547 task->expire = tick_first((tick_is_expired(task->expire, now_ms) ? 0 : task->expire),
548 tick_first(tick_first(ic->rex, ic->wex),
549 tick_first(oc->rex, oc->wex)));
550 task_queue(task);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200551 }
552 if (ic->flags & CF_READ_ACTIVITY)
553 ic->flags &= ~CF_READ_DONTWAIT;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200554}
555
556
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200557/* Called by I/O handlers after completion.. It propagates
Willy Tarreau651e1822015-09-23 20:06:13 +0200558 * connection flags to the stream interface, updates the stream (which may or
559 * may not take this opportunity to try to forward data), then update the
560 * connection's polling based on the channels and stream interface's final
561 * states. The function always returns 0.
Willy Tarreau100c4672012-08-20 12:06:26 +0200562 */
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200563static int si_cs_process(struct conn_stream *cs)
Willy Tarreaufd31e532012-07-23 18:24:25 +0200564{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200565 struct connection *conn = cs->conn;
566 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100567 struct channel *ic = si_ic(si);
568 struct channel *oc = si_oc(si);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200569
Olivier Houchardc7ffa912018-08-28 19:37:41 +0200570 /* If we have data to send, try it now */
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100571 if (!channel_is_empty(oc) && !(si->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau908d26f2018-10-25 14:02:47 +0200572 si_cs_send(cs);
573
Willy Tarreau651e1822015-09-23 20:06:13 +0200574 /* First step, report to the stream-int what was detected at the
575 * connection layer : errors and connection establishment.
576 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200577 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreau3c55ec22012-07-23 19:19:51 +0200578 si->flags |= SI_FL_ERR;
579
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200580 /* If we had early data, and the handshake ended, then
581 * we can remove the flag, and attempt to wake the task up,
582 * in the event there's an analyser waiting for the end of
583 * the handshake.
584 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +0100585 if (!(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS)) &&
586 (cs->flags & CS_FL_WAIT_FOR_HS)) {
587 cs->flags &= ~CS_FL_WAIT_FOR_HS;
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200588 task_wakeup(si_task(si), TASK_WOKEN_MSG);
589 }
590
Willy Tarreau52821e22017-03-18 17:11:37 +0100591 if ((si->state < SI_ST_EST) &&
592 (conn->flags & (CO_FL_CONNECTED | CO_FL_HANDSHAKE)) == CO_FL_CONNECTED) {
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200593 si->exp = TICK_ETERNITY;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100594 oc->flags |= CF_WRITE_NULL;
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200595 }
596
Christopher Faulet297d3e22019-03-22 14:16:14 +0100597 /* Report EOI on the channel if it was reached from the mux point of
598 * view. */
599 if ((cs->flags & CS_FL_EOI) && !(ic->flags & CF_EOI))
Christopher Faulet8e9e3ef2019-05-17 09:14:10 +0200600 ic->flags |= (CF_EOI|CF_READ_PARTIAL);
Christopher Faulet203b2b02019-03-08 09:23:46 +0100601
Willy Tarreau651e1822015-09-23 20:06:13 +0200602 /* Second step : update the stream-int and channels, try to forward any
603 * pending data, then possibly wake the stream up based on the new
604 * stream-int status.
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200605 */
Willy Tarreau651e1822015-09-23 20:06:13 +0200606 stream_int_notify(si);
Christopher Fauleta73e59b2016-12-09 17:30:18 +0100607 channel_release_buffer(ic, &(si_strm(si)->buffer_wait));
Willy Tarreauea3cc482015-09-23 19:37:00 +0200608
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200609 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200610}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200611
Willy Tarreau5368d802012-08-21 18:22:06 +0200612/*
613 * This function is called to send buffer data to a stream socket.
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200614 * It calls the mux layer's snd_buf function. It relies on the
Godbach4f489902013-12-04 17:24:06 +0800615 * caller to commit polling changes. The caller should check conn->flags
616 * for errors.
Willy Tarreau5368d802012-08-21 18:22:06 +0200617 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +0200618int si_cs_send(struct conn_stream *cs)
Willy Tarreau5368d802012-08-21 18:22:06 +0200619{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200620 struct connection *conn = cs->conn;
621 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100622 struct channel *oc = si_oc(si);
Willy Tarreau5368d802012-08-21 18:22:06 +0200623 int ret;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200624 int did_send = 0;
625
626 /* We're already waiting to be able to send, give up */
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100627 if (si->wait_event.events & SUB_RETRY_SEND)
Olivier Houchardf6535282018-08-31 17:29:12 +0200628 return 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200629
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100630 if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
631 si->flags |= SI_FL_ERR;
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200632 return 1;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100633 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200634
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200635 /* we might have been called just after an asynchronous shutw */
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100636 if (conn->flags & CO_FL_SOCK_WR_SH || oc->flags & CF_SHUTW)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200637 return 1;
Willy Tarreau5368d802012-08-21 18:22:06 +0200638
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200639 if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) {
640 ret = conn->mux->snd_pipe(cs, oc->pipe);
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200641 if (ret > 0) {
Willy Tarreauede3d882018-10-24 17:17:56 +0200642 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200643 did_send = 1;
644 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200645
Willy Tarreauafc8a222014-11-28 15:46:27 +0100646 if (!oc->pipe->data) {
647 put_pipe(oc->pipe);
648 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200649 }
650
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100651 if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
652 si->flags |= SI_FL_ERR;
Christopher Faulet5ed7aab2018-11-19 22:02:07 +0100653 return 1;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100654 }
Christopher Faulet3f76f4c2018-11-20 10:21:08 +0100655
656 if (oc->pipe)
657 goto end;
Willy Tarreau5368d802012-08-21 18:22:06 +0200658 }
659
660 /* At this point, the pipe is empty, but we may still have data pending
661 * in the normal buffer.
662 */
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100663 if (co_data(oc)) {
664 /* when we're here, we already know that there is no spliced
665 * data left, and that there are sendable buffered data.
666 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200667
Willy Tarreau5368d802012-08-21 18:22:06 +0200668 /* check if we want to inform the kernel that we're interested in
669 * sending more data after this call. We want this if :
670 * - we're about to close after this last send and want to merge
671 * the ongoing FIN with the last segment.
672 * - we know we can't send everything at once and must get back
673 * here because of unaligned data
674 * - there is still a finite amount of data to forward
675 * The test is arranged so that the most common case does only 2
676 * tests.
677 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100678 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200679
Willy Tarreauafc8a222014-11-28 15:46:27 +0100680 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
681 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
Willy Tarreau4ac49282017-10-17 16:33:46 +0200682 (oc->flags & CF_EXPECT_MORE))) ||
Willy Tarreauecd2e152017-11-07 15:07:25 +0100683 ((oc->flags & CF_ISRESP) &&
684 ((oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW)) == (CF_AUTO_CLOSE|CF_SHUTW_NOW))))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100685 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200686
Willy Tarreauafc8a222014-11-28 15:46:27 +0100687 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100688 send_flag |= CO_SFL_STREAMER;
689
Olivier Houcharda254a372019-04-05 15:30:12 +0200690 if ((si->flags & SI_FL_L7_RETRY) && !b_data(&si->l7_buffer)) {
Olivier Houchardce1a0292019-05-17 15:38:29 +0200691 struct stream *s = si_strm(si);
Olivier Houcharda254a372019-04-05 15:30:12 +0200692 /* If we want to be able to do L7 retries, copy
693 * the data we're about to send, so that we are able
694 * to resend them if needed
695 */
696 /* Try to allocate a buffer if we had none.
697 * If it fails, the next test will just
698 * disable the l7 retries by setting
699 * l7_conn_retries to 0.
700 */
Olivier Houchardce1a0292019-05-17 15:38:29 +0200701 if (!s->txn || (s->txn->req.msg_state != HTTP_MSG_DONE))
Olivier Houcharda254a372019-04-05 15:30:12 +0200702 si->flags &= ~SI_FL_L7_RETRY;
703 else {
704 if (b_is_null(&si->l7_buffer))
705 b_alloc(&si->l7_buffer);
706 if (b_is_null(&si->l7_buffer))
707 si->flags &= ~SI_FL_L7_RETRY;
708 else {
709 memcpy(b_orig(&si->l7_buffer),
710 b_orig(&oc->buf),
711 b_size(&oc->buf));
712 si->l7_buffer.head = co_data(oc);
713 b_add(&si->l7_buffer, co_data(oc));
714 }
715
716 }
717 }
718
Olivier Houcharded0f2072018-08-16 15:41:52 +0200719 ret = cs->conn->mux->snd_buf(cs, &oc->buf, co_data(oc), send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800720 if (ret > 0) {
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200721 did_send = 1;
Willy Tarreauede3d882018-10-24 17:17:56 +0200722 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Willy Tarreau5368d802012-08-21 18:22:06 +0200723
Willy Tarreau77e478c2018-06-19 07:03:14 +0200724 co_set_data(oc, co_data(oc) - ret);
Willy Tarreaudeccd112018-06-14 18:38:55 +0200725 c_realign_if_empty(oc);
726
727 if (!co_data(oc)) {
Godbache68e02d2013-10-11 15:48:29 +0800728 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100729 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800730 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200731
Godbache68e02d2013-10-11 15:48:29 +0800732 /* if some data remain in the buffer, it's only because the
733 * system buffers are full, we will try next time.
734 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200735 }
Christopher Faulete4acd5e2018-11-20 09:34:35 +0100736
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100737 if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
738 si->flags |= SI_FL_ERR;
Christopher Faulete4acd5e2018-11-20 09:34:35 +0100739 return 1;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100740 }
Godbache68e02d2013-10-11 15:48:29 +0800741 }
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100742
Willy Tarreauf6975aa2018-11-15 14:33:05 +0100743 end:
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200744 /* We couldn't send all of our data, let the mux know we'd like to send more */
Willy Tarreau691fe392018-11-12 18:48:52 +0100745 if (!channel_is_empty(oc))
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100746 conn->mux->subscribe(cs, SUB_RETRY_SEND, &si->wait_event);
Olivier Houchardf6535282018-08-31 17:29:12 +0200747 return did_send;
Willy Tarreau5368d802012-08-21 18:22:06 +0200748}
749
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100750/* This is the ->process() function for any stream-interface's wait_event task.
751 * It's assigned during the stream-interface's initialization, for any type of
752 * stream interface. Thus it is always safe to perform a tasklet_wakeup() on a
753 * stream interface, as the presence of the CS is checked there.
754 */
Olivier Houchard91894cb2018-08-02 18:06:28 +0200755struct task *si_cs_io_cb(struct task *t, void *ctx, unsigned short state)
756{
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200757 struct stream_interface *si = ctx;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200758 struct conn_stream *cs = objt_cs(si->end);
Olivier Houchardf6535282018-08-31 17:29:12 +0200759 int ret = 0;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200760
761 if (!cs)
762 return NULL;
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100763
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100764 if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchardf6535282018-08-31 17:29:12 +0200765 ret = si_cs_send(cs);
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100766 if (!(si->wait_event.events & SUB_RETRY_RECV))
Olivier Houchardf6535282018-08-31 17:29:12 +0200767 ret |= si_cs_recv(cs);
768 if (ret != 0)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200769 si_cs_process(cs);
Olivier Houchardf6535282018-08-31 17:29:12 +0200770
Olivier Houchard91894cb2018-08-02 18:06:28 +0200771 return (NULL);
772}
773
Willy Tarreau25f13102015-09-24 11:32:22 +0200774/* This function is designed to be called from within the stream handler to
775 * update the channels' expiration timers and the stream interface's flags
776 * based on the channels' flags. It needs to be called only once after the
777 * channels' flags have settled down, and before they are cleared, though it
778 * doesn't harm to call it as often as desired (it just slightly hurts
779 * performance). It must not be called from outside of the stream handler,
780 * as what it does will be used to compute the stream task's expiration.
781 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100782void si_update(struct stream_interface *si)
Willy Tarreau25f13102015-09-24 11:32:22 +0200783{
784 struct channel *ic = si_ic(si);
785 struct channel *oc = si_oc(si);
786
787 if (!(ic->flags & CF_SHUTR)) {
788 /* Read not closed, update FD status and timeout for reads */
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100789 if (ic->flags & CF_DONT_READ)
790 si_rx_chan_blk(si);
791 else
792 si_rx_chan_rdy(si);
793
794 if (!channel_is_empty(ic)) {
Willy Tarreauf26c26c2018-11-12 16:11:08 +0100795 /* stop reading, imposed by channel's policy or contents */
Willy Tarreaudb398432018-11-15 11:08:52 +0100796 si_rx_room_blk(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200797 }
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200798 else {
Willy Tarreau25f13102015-09-24 11:32:22 +0200799 /* (re)start reading and update timeout. Note: we don't recompute the timeout
800 * everytime we get here, otherwise it would risk never to expire. We only
801 * update it if is was not yet set. The stream socket handler will already
802 * have updated it if there has been a completed I/O.
803 */
Willy Tarreaudb398432018-11-15 11:08:52 +0100804 si_rx_room_rdy(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200805 }
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100806 if (si->flags & SI_FL_RXBLK_ANY & ~SI_FL_RX_WAIT_EP)
807 ic->rex = TICK_ETERNITY;
808 else if (!(ic->flags & CF_READ_NOEXP) && !tick_isset(ic->rex))
809 ic->rex = tick_add_ifset(now_ms, ic->rto);
810
Willy Tarreau47baeb82018-11-15 07:46:57 +0100811 si_chk_rcv(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200812 }
Willy Tarreauabb5d422018-11-14 16:58:52 +0100813 else
814 si_rx_shut_blk(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200815
816 if (!(oc->flags & CF_SHUTW)) {
817 /* Write not closed, update FD status and timeout for writes */
818 if (channel_is_empty(oc)) {
819 /* stop writing */
820 if (!(si->flags & SI_FL_WAIT_DATA)) {
821 if ((oc->flags & CF_SHUTW_NOW) == 0)
822 si->flags |= SI_FL_WAIT_DATA;
823 oc->wex = TICK_ETERNITY;
824 }
825 }
826 else {
827 /* (re)start writing and update timeout. Note: we don't recompute the timeout
828 * everytime we get here, otherwise it would risk never to expire. We only
829 * update it if is was not yet set. The stream socket handler will already
830 * have updated it if there has been a completed I/O.
831 */
832 si->flags &= ~SI_FL_WAIT_DATA;
833 if (!tick_isset(oc->wex)) {
834 oc->wex = tick_add_ifset(now_ms, oc->wto);
835 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
836 /* Note: depending on the protocol, we don't know if we're waiting
837 * for incoming data or not. So in order to prevent the socket from
838 * expiring read timeouts during writes, we refresh the read timeout,
839 * except if it was already infinite or if we have explicitly setup
840 * independent streams.
841 */
842 ic->rex = tick_add_ifset(now_ms, ic->rto);
843 }
844 }
845 }
846 }
847}
848
Willy Tarreaud14844a2018-11-08 18:15:29 +0100849/* updates both stream ints of a same stream at once */
850/* Updates at once the channel flags, and timers of both stream interfaces of a
851 * same stream, to complete the work after the analysers, then updates the data
852 * layer below. This will ensure that any synchronous update performed at the
853 * data layer will be reflected in the channel flags and/or stream-interface.
854 */
855void si_update_both(struct stream_interface *si_f, struct stream_interface *si_b)
856{
857 struct channel *req = si_ic(si_f);
858 struct channel *res = si_oc(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100859 struct conn_stream *cs;
Willy Tarreaud14844a2018-11-08 18:15:29 +0100860
861 req->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
862 res->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
863
Willy Tarreaud14844a2018-11-08 18:15:29 +0100864 si_f->prev_state = si_f->state;
865 si_b->prev_state = si_b->state;
866
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100867 /* front stream-int */
868 cs = objt_cs(si_f->end);
869 if (cs &&
870 si_f->state == SI_ST_EST &&
871 !(res->flags & CF_SHUTW) && /* Write not closed */
872 !channel_is_empty(res) &&
873 !(cs->flags & CS_FL_ERROR) &&
874 !(cs->conn->flags & CO_FL_ERROR)) {
875 if (si_cs_send(cs))
Willy Tarreaudb398432018-11-15 11:08:52 +0100876 si_rx_room_rdy(si_b);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100877 }
878
879 /* back stream-int */
880 cs = objt_cs(si_b->end);
881 if (cs &&
882 (si_b->state == SI_ST_EST || si_b->state == SI_ST_CON) &&
883 !(req->flags & CF_SHUTW) && /* Write not closed */
884 !channel_is_empty(req) &&
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100885 !(cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) &&
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100886 !(cs->conn->flags & CO_FL_ERROR)) {
887 if (si_cs_send(cs))
Willy Tarreaudb398432018-11-15 11:08:52 +0100888 si_rx_room_rdy(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100889 }
890
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100891 /* let's recompute both sides states */
892 if (si_f->state == SI_ST_EST)
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100893 si_update(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100894
895 if (si_b->state == SI_ST_EST)
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100896 si_update(si_b);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100897
898 /* stream ints are processed outside of process_stream() and must be
899 * handled at the latest moment.
900 */
901 if (obj_type(si_f->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +0100902 ((si_rx_endp_ready(si_f) && !si_rx_blocked(si_f)) ||
903 (si_tx_endp_ready(si_f) && !si_tx_blocked(si_f))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100904 appctx_wakeup(si_appctx(si_f));
Willy Tarreaud14844a2018-11-08 18:15:29 +0100905
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100906 if (obj_type(si_b->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +0100907 ((si_rx_endp_ready(si_b) && !si_rx_blocked(si_b)) ||
908 (si_tx_endp_ready(si_b) && !si_tx_blocked(si_b))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100909 appctx_wakeup(si_appctx(si_b));
Willy Tarreaud14844a2018-11-08 18:15:29 +0100910}
911
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200912/*
913 * This function performs a shutdown-read on a stream interface attached to
914 * a connection in a connected or init state (it does nothing for other
915 * states). It either shuts the read side or marks itself as closed. The buffer
916 * flags are updated to reflect the new state. If the stream interface has
917 * SI_FL_NOHALF, we also forward the close to the write side. If a control
918 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +0200919 * descriptors are then shutdown or closed accordingly. The function
920 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200921 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200922static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200923{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200924 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100925 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200926
Willy Tarreauabb5d422018-11-14 16:58:52 +0100927 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100928 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200929 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100930 ic->flags |= CF_SHUTR;
931 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200932
933 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200934 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200935
Willy Tarreau51d0a7e2019-01-31 19:09:59 +0100936 if (si->flags & SI_FL_KILL_CONN)
937 cs->flags |= CS_FL_KILL_CONN;
938
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100939 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaua553ae92017-10-05 18:52:17 +0200940 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200941 si->state = SI_ST_DIS;
942 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200943 }
944 else if (si->flags & SI_FL_NOHALF) {
945 /* we want to immediately forward this close to the write side */
946 return stream_int_shutw_conn(si);
947 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200948}
949
950/*
951 * This function performs a shutdown-write on a stream interface attached to
952 * a connection in a connected or init state (it does nothing for other
953 * states). It either shuts the write side or marks itself as closed. The
954 * buffer flags are updated to reflect the new state. It does also close
955 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +0100956 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200957 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200958static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200959{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200960 struct conn_stream *cs = __objt_cs(si->end);
961 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100962 struct channel *ic = si_ic(si);
963 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200964
Willy Tarreauafc8a222014-11-28 15:46:27 +0100965 oc->flags &= ~CF_SHUTW_NOW;
966 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200967 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100968 oc->flags |= CF_SHUTW;
969 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +0100970 si_done_get(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200971
Hongbo Longe39683c2017-03-10 18:41:51 +0100972 if (tick_isset(si->hcto)) {
973 ic->rto = si->hcto;
974 ic->rex = tick_add(now_ms, ic->rto);
975 }
976
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200977 switch (si->state) {
978 case SI_ST_EST:
979 /* we have to shut before closing, otherwise some short messages
980 * may never leave the system, especially when there are remaining
981 * unread data in the socket input buffer, or when nolinger is set.
982 * However, if SI_FL_NOLINGER is explicitly set, we know there is
983 * no risk so we close both sides immediately.
984 */
Willy Tarreau51d0a7e2019-01-31 19:09:59 +0100985 if (si->flags & SI_FL_KILL_CONN)
986 cs->flags |= CS_FL_KILL_CONN;
987
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200988 if (si->flags & SI_FL_ERR) {
989 /* quick close, the socket is alredy shut anyway */
990 }
991 else if (si->flags & SI_FL_NOLINGER) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200992 /* unclean data-layer shutdown, typically an aborted request
993 * or a forwarded shutdown from a client to a server due to
994 * option abortonclose. No need for the TLS layer to try to
995 * emit a shutdown message.
996 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200997 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200998 }
999 else {
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001000 /* clean data-layer shutdown. This only happens on the
1001 * frontend side, or on the backend side when forwarding
1002 * a client close in TCP mode or in HTTP TUNNEL mode
1003 * while option abortonclose is set. We want the TLS
1004 * layer to try to signal it to the peer before we close.
1005 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001006 cs_shutw(cs, CS_SHW_NORMAL);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001007
Willy Tarreaua553ae92017-10-05 18:52:17 +02001008 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
1009 /* OK just a shutw, but we want the caller
1010 * to disable polling on this FD if exists.
1011 */
1012 conn_cond_update_polling(conn);
1013 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001014 }
1015 }
1016
1017 /* fall through */
1018 case SI_ST_CON:
1019 /* we may have to close a pending connection, and mark the
1020 * response buffer as shutr
1021 */
Willy Tarreau51d0a7e2019-01-31 19:09:59 +01001022 if (si->flags & SI_FL_KILL_CONN)
1023 cs->flags |= CS_FL_KILL_CONN;
Willy Tarreaua553ae92017-10-05 18:52:17 +02001024 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001025 /* fall through */
1026 case SI_ST_CER:
1027 case SI_ST_QUE:
1028 case SI_ST_TAR:
1029 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +02001030 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001031 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +01001032 si->flags &= ~SI_FL_NOLINGER;
1033 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001034 ic->flags |= CF_SHUTR;
1035 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001036 si->exp = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +02001037 }
1038}
1039
Willy Tarreau46a8d922012-08-20 12:38:36 +02001040/* This function is used for inter-stream-interface calls. It is called by the
1041 * consumer to inform the producer side that it may be interested in checking
1042 * for free space in the buffer. Note that it intentionally does not update
1043 * timeouts, so that we can still check them later at wake-up. This function is
1044 * dedicated to connection-based stream interfaces.
1045 */
Willy Tarreauc5788912012-08-24 18:12:41 +02001046static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +02001047{
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001048 /* (re)start reading */
Olivier Houchardb2fc04e2019-04-11 13:56:26 +02001049 if (si->state == SI_ST_CON || si->state == SI_ST_EST)
1050 tasklet_wakeup(si->wait_event.task);
Willy Tarreau46a8d922012-08-20 12:38:36 +02001051}
1052
1053
Willy Tarreaude5722c2012-08-20 15:01:10 +02001054/* This function is used for inter-stream-interface calls. It is called by the
1055 * producer to inform the consumer side that it may be interested in checking
1056 * for data in the buffer. Note that it intentionally does not update timeouts,
1057 * so that we can still check them later at wake-up.
1058 */
Willy Tarreauc5788912012-08-24 18:12:41 +02001059static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001060{
Willy Tarreauafc8a222014-11-28 15:46:27 +01001061 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001062 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001063
Olivier Houchardb2fc04e2019-04-11 13:56:26 +02001064 if (unlikely((si->state != SI_ST_CON && si->state != SI_ST_EST) ||
1065 (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +02001066 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001067
Willy Tarreauafc8a222014-11-28 15:46:27 +01001068 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001069 return;
1070
Willy Tarreauafc8a222014-11-28 15:46:27 +01001071 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +01001072 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001073 return;
1074
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001075 if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchard31f04e42018-10-22 16:01:09 +02001076 si_cs_send(cs);
Willy Tarreau33a09a52018-10-25 13:49:49 +02001077
Willy Tarreaubddf7fc2018-12-19 17:17:10 +01001078 if (cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING) || cs->conn->flags & CO_FL_ERROR) {
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001079 /* Write error on the file descriptor */
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001080 si->flags |= SI_FL_ERR;
1081 goto out_wakeup;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001082 }
1083
1084 /* OK, so now we know that some data might have been sent, and that we may
1085 * have to poll first. We have to do that too if the buffer is not empty.
1086 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001087 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001088 /* the connection is established but we can't write. Either the
1089 * buffer is empty, or we just refrain from sending because the
1090 * ->o limit was reached. Maybe we just wrote the last
1091 * chunk and need to close.
1092 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001093 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001094 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreaude5722c2012-08-20 15:01:10 +02001095 (si->state == SI_ST_EST)) {
1096 si_shutw(si);
1097 goto out_wakeup;
1098 }
1099
Willy Tarreauafc8a222014-11-28 15:46:27 +01001100 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001101 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001102 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001103 }
1104 else {
1105 /* Otherwise there are remaining data to be sent in the buffer,
1106 * which means we have to poll before doing so.
1107 */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001108 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001109 if (!tick_isset(oc->wex))
1110 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001111 }
1112
Willy Tarreauafc8a222014-11-28 15:46:27 +01001113 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1114 struct channel *ic = si_ic(si);
1115
Willy Tarreaude5722c2012-08-20 15:01:10 +02001116 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001117 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1118 !channel_is_empty(oc))
1119 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001120
Willy Tarreauafc8a222014-11-28 15:46:27 +01001121 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001122 /* Note: to prevent the client from expiring read timeouts
1123 * during writes, we refresh it. We only do this if the
1124 * interface is not configured for "independent streams",
1125 * because for some applications it's better not to do this,
1126 * for instance when continuously exchanging small amounts
1127 * of data which can full the socket buffers long before a
1128 * write timeout is detected.
1129 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001130 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001131 }
1132 }
1133
1134 /* in case of special condition (error, shutdown, end of write...), we
1135 * have to notify the task.
1136 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001137 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1138 ((oc->flags & CF_WAKE_WRITE) &&
1139 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreaue6300be2014-01-25 02:33:21 +01001140 si->state != SI_ST_EST)))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001141 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001142 if (!(si->flags & SI_FL_DONT_WAKE))
1143 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001144 }
1145}
1146
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001147/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001148 * This is the callback which is called by the connection layer to receive data
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001149 * into the buffer from the connection. It iterates over the mux layer's
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001150 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001151 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +02001152int si_cs_recv(struct conn_stream *cs)
Willy Tarreauce323de2012-08-20 21:41:06 +02001153{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001154 struct connection *conn = cs->conn;
1155 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001156 struct channel *ic = si_ic(si);
Olivier Houchardf6535282018-08-31 17:29:12 +02001157 int ret, max, cur_read = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001158 int read_poll = MAX_READ_POLL_LOOPS;
Christopher Fauletc6618d62018-10-11 15:56:04 +02001159 int flags = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001160
Olivier Houchardf6535282018-08-31 17:29:12 +02001161 /* If another call to si_cs_recv() failed, and we subscribed to
1162 * recv events already, give up now.
1163 */
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001164 if (si->wait_event.events & SUB_RETRY_RECV)
Olivier Houchardf6535282018-08-31 17:29:12 +02001165 return 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001166
Willy Tarreauce323de2012-08-20 21:41:06 +02001167 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001168 if (ic->flags & CF_SHUTR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001169 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001170
Willy Tarreau54e917c2017-08-30 07:35:35 +02001171 /* stop here if we reached the end of data */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001172 if (cs->flags & CS_FL_EOS)
Willy Tarreau54e917c2017-08-30 07:35:35 +02001173 goto out_shutdown_r;
1174
Christopher Fauletf061e422018-12-07 14:51:20 +01001175 /* stop immediately on errors. Note that we DON'T want to stop on
1176 * POLL_ERR, as the poller might report a write error while there
1177 * are still data available in the recv buffer. This typically
1178 * happens when we send too large a request to a backend server
1179 * which rejects it before reading it all.
1180 */
1181 if (!(cs->flags & CS_FL_RCV_MORE)) {
1182 if (!conn_xprt_ready(conn))
1183 return 0;
1184 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
1185 return 1; // We want to make sure si_cs_wake() is called, so that process_strema is woken up, on failure
1186 }
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001187
Willy Tarreau7ab99a32018-12-18 09:15:43 +01001188 /* prepare to detect if the mux needs more room */
1189 cs->flags &= ~CS_FL_WANT_ROOM;
1190
Willy Tarreau77e478c2018-06-19 07:03:14 +02001191 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !co_data(ic) &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001192 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001193 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001194 /* The buffer was empty and nothing was transferred for more
1195 * than one second. This was caused by a pause and not by
1196 * congestion. Reset any streaming mode to reduce latency.
1197 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001198 ic->xfer_small = 0;
1199 ic->xfer_large = 0;
1200 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001201 }
1202
Willy Tarreau96199b12012-08-24 00:46:52 +02001203 /* First, let's see if we may splice data across the channel without
1204 * using a buffer.
1205 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001206 if (conn->xprt->rcv_pipe && conn->mux->rcv_pipe &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001207 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1208 ic->flags & CF_KERN_SPLICING) {
Willy Tarreaud760eec2018-07-10 09:50:25 +02001209 if (c_data(ic)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001210 /* We're embarrassed, there are already data pending in
1211 * the buffer and we don't want to have them at two
1212 * locations at a time. Let's indicate we need some
1213 * place and ask the consumer to hurry.
1214 */
Christopher Fauletc6618d62018-10-11 15:56:04 +02001215 flags |= CO_RFL_BUF_FLUSH;
Willy Tarreau96199b12012-08-24 00:46:52 +02001216 goto abort_splice;
1217 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001218
Willy Tarreauafc8a222014-11-28 15:46:27 +01001219 if (unlikely(ic->pipe == NULL)) {
1220 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1221 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001222 goto abort_splice;
1223 }
1224 }
1225
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001226 ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001227 if (ret < 0) {
1228 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001229 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001230 goto abort_splice;
1231 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001232
Willy Tarreau96199b12012-08-24 00:46:52 +02001233 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001234 if (ic->to_forward != CHN_INFINITE_FORWARD)
1235 ic->to_forward -= ret;
1236 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001237 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001238 ic->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +02001239 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001240
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001241 if (cs->flags & CS_FL_EOS)
Willy Tarreau96199b12012-08-24 00:46:52 +02001242 goto out_shutdown_r;
1243
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001244 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001245 return 1;
Willy Tarreau96199b12012-08-24 00:46:52 +02001246
Willy Tarreau61d39a02013-07-18 21:49:32 +02001247 if (conn->flags & CO_FL_WAIT_ROOM) {
1248 /* the pipe is full or we have read enough data that it
1249 * could soon be full. Let's stop before needing to poll.
1250 */
Willy Tarreaudb398432018-11-15 11:08:52 +01001251 si_rx_room_blk(si);
Willy Tarreauffb12052018-11-15 16:06:02 +01001252 goto done_recv;
Willy Tarreau61d39a02013-07-18 21:49:32 +02001253 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001254
Willy Tarreauce323de2012-08-20 21:41:06 +02001255 /* splice not possible (anymore), let's go on on standard copy */
1256 }
Willy Tarreau81464b42018-11-15 15:52:53 +01001257 else {
1258 /* be sure not to block regular receive path below */
1259 conn->flags &= ~CO_FL_WAIT_ROOM;
1260 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001261
1262 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001263 if (ic->pipe && unlikely(!ic->pipe->data)) {
1264 put_pipe(ic->pipe);
1265 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001266 }
1267
Christopher Fauleta73e59b2016-12-09 17:30:18 +01001268 /* now we'll need a input buffer for the stream */
Willy Tarreau581abd32018-10-25 10:21:41 +02001269 if (!si_alloc_ibuf(si, &(si_strm(si)->buffer_wait)))
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001270 goto end_recv;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001271
Willy Tarreau61d39a02013-07-18 21:49:32 +02001272 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1273 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1274 * that if such an event is not handled above in splice, it will be handled here by
1275 * recv().
1276 */
Olivier Houchardc490efd2018-12-04 15:46:16 +01001277 while ((cs->flags & CS_FL_RCV_MORE) ||
1278 (!(conn->flags & (CO_FL_ERROR | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE)) &&
1279 (!(cs->flags & (CS_FL_ERROR|CS_FL_EOS))) && !(ic->flags & CF_SHUTR))) {
Christopher Faulet4eb7d742018-10-11 15:29:21 +02001280 /* <max> may be null. This is the mux responsibility to set
1281 * CS_FL_RCV_MORE on the CS if more space is needed.
1282 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001283 max = channel_recv_max(ic);
Christopher Faulet72d91252018-10-17 11:08:23 +02001284 ret = cs->conn->mux->rcv_buf(cs, &ic->buf, max,
1285 flags |
1286 (co_data(ic) ? CO_RFL_BUF_WET : 0) |
1287 ((channel_recv_limit(ic) < b_size(&ic->buf)) ? CO_RFL_KEEP_RSV : 0));
Willy Tarreau674e0ad2018-12-05 13:45:41 +01001288
Olivier Houchardd247be02018-12-06 16:22:29 +01001289 if (cs->flags & CS_FL_WANT_ROOM)
Willy Tarreaudb398432018-11-15 11:08:52 +01001290 si_rx_room_blk(si);
Willy Tarreau6577b482017-12-10 21:19:33 +01001291
Christopher Fauleteffc3752018-10-31 08:53:54 +01001292 if (cs->flags & CS_FL_READ_PARTIAL) {
1293 if (tick_isset(ic->rex))
1294 ic->rex = tick_add_ifset(now_ms, ic->rto);
1295 cs->flags &= ~CS_FL_READ_PARTIAL;
1296 }
1297
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001298 if (ret <= 0) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001299 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001300 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001301
Olivier Houcharda254a372019-04-05 15:30:12 +02001302 if (si->flags & SI_FL_L7_RETRY) {
1303 struct htx *htx;
1304 struct htx_sl *sl;
1305
1306 htx = htxbuf(&ic->buf);
1307 if (htx) {
1308 sl = http_find_stline(htx);
1309 if (sl && l7_status_match(si_strm(si)->be,
1310 sl->info.res.status)) {
1311 /* If we got a status for which we would
1312 * like to retry the request, empty
1313 * the buffer and pretend there's an
1314 * error on the channel.
1315 */
1316 ic->flags |= CF_READ_ERROR;
1317 htx_reset(htx);
1318 return 1;
1319 }
1320 }
1321 si->flags &= ~SI_FL_L7_RETRY;
1322 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001323 cur_read += ret;
1324
1325 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001326 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001327 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001328 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1329 if (fwd > ic->to_forward)
1330 fwd = ic->to_forward;
1331 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001332 }
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001333 c_adv(ic, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001334 }
1335
Willy Tarreauafc8a222014-11-28 15:46:27 +01001336 ic->flags |= CF_READ_PARTIAL;
1337 ic->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001338
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001339 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
1340 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001341 si_rx_chan_blk(si);
Willy Tarreau62dd6982017-11-18 11:26:20 +01001342 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001343 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001344
1345 /* if too many bytes were missing from last read, it means that
1346 * it's pointless trying to read again because the system does
1347 * not have them in buffers.
1348 */
1349 if (ret < max) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001350 /* if a streamer has read few data, it may be because we
1351 * have exhausted system buffers. It's not worth trying
1352 * again.
1353 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001354 if (ic->flags & CF_STREAMER) {
1355 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001356 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001357 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001358 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001359
1360 /* if we read a large block smaller than what we requested,
1361 * it's almost certain we'll never get anything more.
1362 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001363 if (ret >= global.tune.recv_enough) {
1364 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001365 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001366 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001367 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001368 }
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001369
1370 /* if we are waiting for more space, don't try to read more data
1371 * right now.
1372 */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001373 if (si_rx_blocked(si))
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001374 break;
Willy Tarreauce323de2012-08-20 21:41:06 +02001375 } /* while !flags */
1376
Willy Tarreauffb12052018-11-15 16:06:02 +01001377 done_recv:
Willy Tarreauc5890e62014-02-09 17:47:01 +01001378 if (cur_read) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001379 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001380 (cur_read <= ic->buf.size / 2)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001381 ic->xfer_large = 0;
1382 ic->xfer_small++;
1383 if (ic->xfer_small >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001384 /* we have read less than half of the buffer in
1385 * one pass, and this happened at least 3 times.
1386 * This is definitely not a streamer.
1387 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001388 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001389 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001390 else if (ic->xfer_small >= 2) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001391 /* if the buffer has been at least half full twice,
1392 * we receive faster than we send, so at least it
1393 * is not a "fast streamer".
1394 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001395 ic->flags &= ~CF_STREAMER_FAST;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001396 }
1397 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001398 else if (!(ic->flags & CF_STREAMER_FAST) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001399 (cur_read >= ic->buf.size - global.tune.maxrewrite)) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001400 /* we read a full buffer at once */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001401 ic->xfer_small = 0;
1402 ic->xfer_large++;
1403 if (ic->xfer_large >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001404 /* we call this buffer a fast streamer if it manages
1405 * to be filled in one call 3 consecutive times.
1406 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001407 ic->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001408 }
1409 }
1410 else {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001411 ic->xfer_small = 0;
1412 ic->xfer_large = 0;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001413 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001414 ic->last_read = now_ms;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001415 }
1416
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001417 end_recv:
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001418 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001419 return 1;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001420
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001421 if (cs->flags & CS_FL_EOS)
Willy Tarreauce323de2012-08-20 21:41:06 +02001422 /* connection closed */
1423 goto out_shutdown_r;
1424
Willy Tarreau32742fd2018-11-14 14:07:59 +01001425 /* Subscribe to receive events if we're blocking on I/O */
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001426 if (!si_rx_blocked(si)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001427 conn->mux->subscribe(cs, SUB_RETRY_RECV, &si->wait_event);
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001428 si_rx_endp_done(si);
1429 } else {
1430 si_rx_endp_more(si);
1431 }
Olivier Houchardf6535282018-08-31 17:29:12 +02001432
Willy Tarreau32742fd2018-11-14 14:07:59 +01001433 return (cur_read != 0) || si_rx_blocked(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001434
1435 out_shutdown_r:
Olivier Houchardfd0c2dc2018-12-13 15:38:16 +01001436 if (conn->flags & CO_FL_CONNECTED) {
1437 /* we received a shutdown */
1438 ic->flags |= CF_READ_NULL;
1439 if (ic->flags & CF_AUTO_CLOSE)
1440 channel_shutw_now(ic);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +01001441 stream_int_read0(si);
Olivier Houchardfd0c2dc2018-12-13 15:38:16 +01001442 }
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001443 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001444}
1445
1446/*
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001447 * This function propagates a null read received on a socket-based connection.
1448 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001449 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001450 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +01001451static void stream_int_read0(struct stream_interface *si)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001452{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001453 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001454 struct channel *ic = si_ic(si);
1455 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001456
Willy Tarreauabb5d422018-11-14 16:58:52 +01001457 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001458 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001459 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001460 ic->flags |= CF_SHUTR;
1461 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001462
1463 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1464 return;
1465
Willy Tarreauafc8a222014-11-28 15:46:27 +01001466 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001467 goto do_close;
1468
1469 if (si->flags & SI_FL_NOHALF) {
1470 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001471 /* force flag on ssl to keep stream in cache */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001472 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001473 goto do_close;
1474 }
1475
1476 /* otherwise that's just a normal read shutdown */
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001477 return;
1478
1479 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001480 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaua553ae92017-10-05 18:52:17 +02001481 cs_close(cs);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001482
Willy Tarreauafc8a222014-11-28 15:46:27 +01001483 oc->flags &= ~CF_SHUTW_NOW;
1484 oc->flags |= CF_SHUTW;
1485 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001486
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001487 si_done_get(si);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001488
Olivier Houchardaacc4052019-05-21 17:43:50 +02001489 /* Don't change the state to SI_ST_DIS yet if we're still
1490 * in SI_ST_CON, otherwise it means sess_establish() hasn't
1491 * been called yet, and so the analysers would not run.
1492 */
1493 if (si->state == SI_ST_EST)
1494 si->state = SI_ST_DIS;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001495 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001496 return;
1497}
1498
Willy Tarreau651e1822015-09-23 20:06:13 +02001499/* Callback to be used by applet handlers upon completion. It updates the stream
1500 * (which may or may not take this opportunity to try to forward data), then
Emeric Brun2802b072017-06-30 14:11:56 +02001501 * may re-enable the applet's based on the channels and stream interface's final
Willy Tarreau651e1822015-09-23 20:06:13 +02001502 * states.
1503 */
Willy Tarreauaa977ba2015-09-25 11:45:06 +02001504void si_applet_wake_cb(struct stream_interface *si)
Willy Tarreaue5f86492015-04-19 15:16:35 +02001505{
Willy Tarreaueca572f2015-09-25 19:11:55 +02001506 struct channel *ic = si_ic(si);
1507
1508 /* If the applet wants to write and the channel is closed, it's a
1509 * broken pipe and it must be reported.
1510 */
Willy Tarreau05b9b642018-11-14 13:43:35 +01001511 if (!(si->flags & SI_FL_RX_WAIT_EP) && (ic->flags & CF_SHUTR))
Willy Tarreaueca572f2015-09-25 19:11:55 +02001512 si->flags |= SI_FL_ERR;
1513
Willy Tarreau186dcdd2018-11-16 16:18:34 +01001514 /* automatically mark the applet having data available if it reported
1515 * begin blocked by the channel.
1516 */
1517 if (si_rx_blocked(si))
1518 si_rx_endp_more(si);
1519
Willy Tarreau651e1822015-09-23 20:06:13 +02001520 /* update the stream-int, channels, and possibly wake the stream up */
1521 stream_int_notify(si);
Willy Tarreaue5f86492015-04-19 15:16:35 +02001522
Willy Tarreau32742fd2018-11-14 14:07:59 +01001523 /* stream_int_notify may have passed through chk_snd and released some
1524 * RXBLK flags. Process_stream will consider those flags to wake up the
1525 * appctx but in the case the task is not in runqueue we may have to
1526 * wakeup the appctx immediately.
Emeric Brun2802b072017-06-30 14:11:56 +02001527 */
Olivier Houchard51205a12019-04-17 19:29:35 +02001528 if ((si_rx_endp_ready(si) && !si_rx_blocked(si)) ||
1529 (si_tx_endp_ready(si) && !si_tx_blocked(si)))
Willy Tarreau563cc372015-04-19 18:13:56 +02001530 appctx_wakeup(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001531}
1532
1533/*
1534 * This function performs a shutdown-read on a stream interface attached to an
1535 * applet in a connected or init state (it does nothing for other states). It
1536 * either shuts the read side or marks itself as closed. The buffer flags are
1537 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1538 * we also forward the close to the write side. The owner task is woken up if
1539 * it exists.
1540 */
1541static void stream_int_shutr_applet(struct stream_interface *si)
1542{
1543 struct channel *ic = si_ic(si);
1544
Willy Tarreauabb5d422018-11-14 16:58:52 +01001545 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001546 if (ic->flags & CF_SHUTR)
1547 return;
1548 ic->flags |= CF_SHUTR;
1549 ic->rex = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001550
Willy Tarreau828824a2015-04-19 17:20:03 +02001551 /* Note: on shutr, we don't call the applet */
1552
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001553 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1554 return;
1555
1556 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau958f0742015-09-25 20:24:26 +02001557 si_applet_release(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001558 si->state = SI_ST_DIS;
1559 si->exp = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001560 }
1561 else if (si->flags & SI_FL_NOHALF) {
1562 /* we want to immediately forward this close to the write side */
1563 return stream_int_shutw_applet(si);
1564 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001565}
1566
1567/*
1568 * This function performs a shutdown-write on a stream interface attached to an
1569 * applet in a connected or init state (it does nothing for other states). It
1570 * either shuts the write side or marks itself as closed. The buffer flags are
1571 * updated to reflect the new state. It does also close everything if the SI
1572 * was marked as being in error state. The owner task is woken up if it exists.
1573 */
1574static void stream_int_shutw_applet(struct stream_interface *si)
1575{
1576 struct channel *ic = si_ic(si);
1577 struct channel *oc = si_oc(si);
1578
1579 oc->flags &= ~CF_SHUTW_NOW;
1580 if (oc->flags & CF_SHUTW)
1581 return;
1582 oc->flags |= CF_SHUTW;
1583 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001584 si_done_get(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001585
Hongbo Longe39683c2017-03-10 18:41:51 +01001586 if (tick_isset(si->hcto)) {
1587 ic->rto = si->hcto;
1588 ic->rex = tick_add(now_ms, ic->rto);
1589 }
1590
Willy Tarreau828824a2015-04-19 17:20:03 +02001591 /* on shutw we always wake the applet up */
1592 appctx_wakeup(si_appctx(si));
1593
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001594 switch (si->state) {
1595 case SI_ST_EST:
1596 /* we have to shut before closing, otherwise some short messages
1597 * may never leave the system, especially when there are remaining
1598 * unread data in the socket input buffer, or when nolinger is set.
1599 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1600 * no risk so we close both sides immediately.
1601 */
1602 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1603 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1604 return;
1605
1606 /* fall through */
1607 case SI_ST_CON:
1608 case SI_ST_CER:
1609 case SI_ST_QUE:
1610 case SI_ST_TAR:
1611 /* Note that none of these states may happen with applets */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001612 si_applet_release(si);
Willy Tarreau958f0742015-09-25 20:24:26 +02001613 si->state = SI_ST_DIS;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001614 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +01001615 si->flags &= ~SI_FL_NOLINGER;
1616 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001617 ic->flags |= CF_SHUTR;
1618 ic->rex = TICK_ETERNITY;
1619 si->exp = TICK_ETERNITY;
1620 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001621}
1622
1623/* chk_rcv function for applets */
1624static void stream_int_chk_rcv_applet(struct stream_interface *si)
1625{
1626 struct channel *ic = si_ic(si);
1627
1628 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1629 __FUNCTION__,
1630 si, si->state, ic->flags, si_oc(si)->flags);
1631
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001632 if (!ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001633 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001634 appctx_wakeup(si_appctx(si));
Thierry FOURNIER5bc2cbf2015-09-04 18:40:36 +02001635 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001636}
1637
1638/* chk_snd function for applets */
1639static void stream_int_chk_snd_applet(struct stream_interface *si)
1640{
1641 struct channel *oc = si_oc(si);
1642
1643 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1644 __FUNCTION__,
1645 si, si->state, si_ic(si)->flags, oc->flags);
1646
1647 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1648 return;
1649
Willy Tarreau828824a2015-04-19 17:20:03 +02001650 /* we only wake the applet up if it was waiting for some data */
1651
1652 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001653 return;
1654
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001655 if (!tick_isset(oc->wex))
1656 oc->wex = tick_add_ifset(now_ms, oc->wto);
1657
Willy Tarreau828824a2015-04-19 17:20:03 +02001658 if (!channel_is_empty(oc)) {
1659 /* (re)start sending */
1660 appctx_wakeup(si_appctx(si));
1661 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001662}
1663
Willy Tarreaudded32d2008-11-30 19:48:07 +01001664/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001665 * Local variables:
1666 * c-indent-level: 8
1667 * c-basic-offset: 8
1668 * End:
1669 */