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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>
Willy Tarreau96199b12012-08-24 00:46:52 +020033#include <proto/pipe.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020034#include <proto/stream.h>
Willy Tarreau269358d2009-09-20 20:14:49 +020035#include <proto/stream_interface.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010036#include <proto/task.h>
37
Willy Tarreaufd31e532012-07-23 18:24:25 +020038#include <types/pipe.h>
39
Willy Tarreauf873d752012-05-11 17:47:17 +020040/* socket functions used when running a stream interface as a task */
Willy Tarreau6fe15412013-09-29 15:16:03 +020041static void stream_int_shutr(struct stream_interface *si);
42static void stream_int_shutw(struct stream_interface *si);
Willy Tarreauf873d752012-05-11 17:47:17 +020043static void stream_int_chk_rcv(struct stream_interface *si);
44static void stream_int_chk_snd(struct stream_interface *si);
Willy Tarreau6fe15412013-09-29 15:16:03 +020045static void stream_int_shutr_conn(struct stream_interface *si);
46static void stream_int_shutw_conn(struct stream_interface *si);
Willy Tarreauc5788912012-08-24 18:12:41 +020047static void stream_int_chk_rcv_conn(struct stream_interface *si);
48static void stream_int_chk_snd_conn(struct stream_interface *si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +020049static void stream_int_shutr_applet(struct stream_interface *si);
50static void stream_int_shutw_applet(struct stream_interface *si);
51static void stream_int_chk_rcv_applet(struct stream_interface *si);
52static void stream_int_chk_snd_applet(struct stream_interface *si);
Willy Tarreau4aa36832012-10-02 20:07:22 +020053static void si_conn_recv_cb(struct connection *conn);
54static void si_conn_send_cb(struct connection *conn);
Willy Tarreau2396c1c2012-10-03 21:12:16 +020055static int si_conn_wake_cb(struct connection *conn);
Willy Tarreau27375622013-12-17 00:00:28 +010056static int si_idle_conn_wake_cb(struct connection *conn);
57static void si_idle_conn_null_cb(struct connection *conn);
Willy Tarreauf873d752012-05-11 17:47:17 +020058
Willy Tarreauc5788912012-08-24 18:12:41 +020059/* stream-interface operations for embedded tasks */
60struct si_ops si_embedded_ops = {
Willy Tarreau5c979a92012-05-07 17:15:39 +020061 .chk_rcv = stream_int_chk_rcv,
62 .chk_snd = stream_int_chk_snd,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020063 .shutr = stream_int_shutr,
64 .shutw = stream_int_shutw,
Willy Tarreau5c979a92012-05-07 17:15:39 +020065};
66
Willy Tarreauc5788912012-08-24 18:12:41 +020067/* stream-interface operations for connections */
68struct si_ops si_conn_ops = {
69 .update = stream_int_update_conn,
70 .chk_rcv = stream_int_chk_rcv_conn,
71 .chk_snd = stream_int_chk_snd_conn,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020072 .shutr = stream_int_shutr_conn,
73 .shutw = stream_int_shutw_conn,
Willy Tarreauc5788912012-08-24 18:12:41 +020074};
75
Willy Tarreaud45b9f82015-04-13 16:30:14 +020076/* stream-interface operations for connections */
77struct si_ops si_applet_ops = {
78 .update = stream_int_update_applet,
79 .chk_rcv = stream_int_chk_rcv_applet,
80 .chk_snd = stream_int_chk_snd_applet,
81 .shutr = stream_int_shutr_applet,
82 .shutw = stream_int_shutw_applet,
83};
84
Willy Tarreau74beec32012-10-03 00:41:04 +020085struct data_cb si_conn_cb = {
Willy Tarreauc5788912012-08-24 18:12:41 +020086 .recv = si_conn_recv_cb,
87 .send = si_conn_send_cb,
Willy Tarreau4aa36832012-10-02 20:07:22 +020088 .wake = si_conn_wake_cb,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +010089 .name = "STRM",
Willy Tarreauc5788912012-08-24 18:12:41 +020090};
91
Willy Tarreau27375622013-12-17 00:00:28 +010092struct data_cb si_idle_conn_cb = {
93 .recv = si_idle_conn_null_cb,
94 .send = si_idle_conn_null_cb,
95 .wake = si_idle_conn_wake_cb,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +010096 .name = "IDLE",
Willy Tarreau27375622013-12-17 00:00:28 +010097};
98
Willy Tarreaucff64112008-11-03 06:26:53 +010099/*
100 * This function only has to be called once after a wakeup event in case of
101 * suspected timeout. It controls the stream interface timeouts and sets
102 * si->flags accordingly. It does NOT close anything, as this timeout may
103 * be used for any purpose. It returns 1 if the timeout fired, otherwise
104 * zero.
105 */
106int stream_int_check_timeouts(struct stream_interface *si)
107{
108 if (tick_is_expired(si->exp, now_ms)) {
109 si->flags |= SI_FL_EXP;
110 return 1;
111 }
112 return 0;
113}
114
Willy Tarreaufe3718a2008-11-30 18:14:12 +0100115/* to be called only when in SI_ST_DIS with SI_FL_ERR */
Willy Tarreaucff64112008-11-03 06:26:53 +0100116void stream_int_report_error(struct stream_interface *si)
117{
118 if (!si->err_type)
119 si->err_type = SI_ET_DATA_ERR;
120
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100121 si_oc(si)->flags |= CF_WRITE_ERROR;
122 si_ic(si)->flags |= CF_READ_ERROR;
Willy Tarreaucff64112008-11-03 06:26:53 +0100123}
124
125/*
Willy Tarreaudded32d2008-11-30 19:48:07 +0100126 * Returns a message to the client ; the connection is shut down for read,
127 * and the request is cleared so that no server connection can be initiated.
128 * The buffer is marked for read shutdown on the other side to protect the
129 * message, and the buffer write is enabled. The message is contained in a
Willy Tarreau148d0992010-01-10 10:21:21 +0100130 * "chunk". If it is null, then an empty message is used. The reply buffer does
131 * not need to be empty before this, and its contents will not be overwritten.
132 * The primary goal of this function is to return error messages to a client.
Willy Tarreaudded32d2008-11-30 19:48:07 +0100133 */
134void stream_int_retnclose(struct stream_interface *si, const struct chunk *msg)
135{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100136 struct channel *ic = si_ic(si);
137 struct channel *oc = si_oc(si);
138
139 channel_auto_read(ic);
140 channel_abort(ic);
141 channel_auto_close(ic);
142 channel_erase(ic);
143 channel_truncate(oc);
Willy Tarreau798e1282010-12-12 13:06:00 +0100144
Willy Tarreau148d0992010-01-10 10:21:21 +0100145 if (likely(msg && msg->len))
Willy Tarreauafc8a222014-11-28 15:46:27 +0100146 bo_inject(oc, msg->str, msg->len);
Willy Tarreaudded32d2008-11-30 19:48:07 +0100147
Willy Tarreauafc8a222014-11-28 15:46:27 +0100148 oc->wex = tick_add_ifset(now_ms, oc->wto);
149 channel_auto_read(oc);
150 channel_auto_close(oc);
151 channel_shutr_now(oc);
Willy Tarreau5d881d02009-12-27 22:51:06 +0100152}
153
Willy Tarreau4a36b562012-08-06 19:31:45 +0200154/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200155 * This function performs a shutdown-read on a detached stream interface in a
156 * connected or init state (it does nothing for other states). It either shuts
157 * the read side or marks itself as closed. The buffer flags are updated to
158 * reflect the new state. If the stream interface has SI_FL_NOHALF, we also
159 * forward the close to the write side. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200160 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200161static void stream_int_shutr(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200162{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100163 struct channel *ic = si_ic(si);
164
165 ic->flags &= ~CF_SHUTR_NOW;
166 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200167 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100168 ic->flags |= CF_SHUTR;
169 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200170 si->flags &= ~SI_FL_WAIT_ROOM;
171
172 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200173 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200174
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100175 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200176 si->state = SI_ST_DIS;
177 si->exp = TICK_ETERNITY;
Willy Tarreaud8ccffe2010-09-07 16:16:50 +0200178 }
Willy Tarreau4a36b562012-08-06 19:31:45 +0200179 else if (si->flags & SI_FL_NOHALF) {
180 /* we want to immediately forward this close to the write side */
181 return stream_int_shutw(si);
182 }
Willy Tarreau0bd05ea2010-07-02 11:18:03 +0200183
Willy Tarreau4a36b562012-08-06 19:31:45 +0200184 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100185 if (!(si->flags & SI_FL_DONT_WAKE))
186 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200187}
188
Willy Tarreau4a36b562012-08-06 19:31:45 +0200189/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200190 * This function performs a shutdown-write on a detached stream interface in a
191 * connected or init state (it does nothing for other states). It either shuts
192 * the write side or marks itself as closed. The buffer flags are updated to
193 * reflect the new state. It does also close everything if the SI was marked as
194 * being in error state. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200195 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200196static void stream_int_shutw(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200197{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100198 struct channel *ic = si_ic(si);
199 struct channel *oc = si_oc(si);
200
201 oc->flags &= ~CF_SHUTW_NOW;
202 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200203 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100204 oc->flags |= CF_SHUTW;
205 oc->wex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200206 si->flags &= ~SI_FL_WAIT_DATA;
207
Hongbo Longe39683c2017-03-10 18:41:51 +0100208 if (tick_isset(si->hcto)) {
209 ic->rto = si->hcto;
210 ic->rex = tick_add(now_ms, ic->rto);
211 }
212
Willy Tarreaufb90d942009-09-05 20:57:35 +0200213 switch (si->state) {
214 case SI_ST_EST:
Willy Tarreau4a36b562012-08-06 19:31:45 +0200215 /* we have to shut before closing, otherwise some short messages
216 * may never leave the system, especially when there are remaining
217 * unread data in the socket input buffer, or when nolinger is set.
218 * However, if SI_FL_NOLINGER is explicitly set, we know there is
219 * no risk so we close both sides immediately.
220 */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200221 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
Willy Tarreauafc8a222014-11-28 15:46:27 +0100222 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200223 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200224
225 /* fall through */
226 case SI_ST_CON:
227 case SI_ST_CER:
Willy Tarreau32d3ee92010-12-29 14:03:02 +0100228 case SI_ST_QUE:
229 case SI_ST_TAR:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200230 /* Note that none of these states may happen with applets */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200231 si->state = SI_ST_DIS;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200232 default:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200233 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100234 ic->flags &= ~CF_SHUTR_NOW;
235 ic->flags |= CF_SHUTR;
236 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200237 si->exp = TICK_ETERNITY;
238 }
239
Willy Tarreau4a36b562012-08-06 19:31:45 +0200240 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100241 if (!(si->flags & SI_FL_DONT_WAKE))
242 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200243}
244
245/* default chk_rcv function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200246static void stream_int_chk_rcv(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200247{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100248 struct channel *ic = si_ic(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200249
Willy Tarreauafc8a222014-11-28 15:46:27 +0100250 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200251 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100252 si, si->state, ic->flags, si_oc(si)->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200253
Willy Tarreauafc8a222014-11-28 15:46:27 +0100254 if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ))))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200255 return;
256
Willy Tarreauafc8a222014-11-28 15:46:27 +0100257 if (!channel_may_recv(ic) || ic->pipe) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200258 /* stop reading */
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +0200259 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200260 }
261 else {
262 /* (re)start reading */
263 si->flags &= ~SI_FL_WAIT_ROOM;
Willy Tarreau07373b82014-11-28 12:08:47 +0100264 if (!(si->flags & SI_FL_DONT_WAKE))
265 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200266 }
267}
268
269/* default chk_snd function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200270static void stream_int_chk_snd(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200271{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100272 struct channel *oc = si_oc(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200273
Willy Tarreauafc8a222014-11-28 15:46:27 +0100274 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200275 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100276 si, si->state, si_ic(si)->flags, oc->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200277
Willy Tarreauafc8a222014-11-28 15:46:27 +0100278 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200279 return;
280
281 if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100282 channel_is_empty(oc)) /* called with nothing to send ! */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200283 return;
284
285 /* Otherwise there are remaining data to be sent in the buffer,
286 * so we tell the handler.
287 */
288 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100289 if (!tick_isset(oc->wex))
290 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200291
Willy Tarreau07373b82014-11-28 12:08:47 +0100292 if (!(si->flags & SI_FL_DONT_WAKE))
293 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200294}
295
Willy Tarreaua9ff5e62015-07-19 18:46:30 +0200296/* Register an applet to handle a stream_interface as a new appctx. The SI will
297 * wake it up everytime it is solicited. The appctx must be deleted by the task
298 * handler using si_release_endpoint(), possibly from within the function itself.
299 * It also pre-initializes the applet's context and returns it (or NULL in case
300 * it could not be allocated).
Willy Tarreaufb90d942009-09-05 20:57:35 +0200301 */
Willy Tarreau30576452015-04-13 13:50:30 +0200302struct appctx *stream_int_register_handler(struct stream_interface *si, struct applet *app)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200303{
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100304 struct appctx *appctx;
305
Willy Tarreau07373b82014-11-28 12:08:47 +0100306 DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si_task(si));
Willy Tarreaufb90d942009-09-05 20:57:35 +0200307
Willy Tarreaua7513f52015-04-05 00:15:26 +0200308 appctx = si_alloc_appctx(si, app);
Willy Tarreaua69fc9f2014-12-22 19:34:00 +0100309 if (!appctx)
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100310 return NULL;
311
Willy Tarreaufe127932015-04-21 19:23:39 +0200312 si_applet_cant_get(si);
Willy Tarreau828824a2015-04-19 17:20:03 +0200313 appctx_wakeup(appctx);
Willy Tarreau1fbe1c92013-12-01 09:35:41 +0100314 return si_appctx(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200315}
316
Willy Tarreau2c6be842012-07-06 17:12:34 +0200317/* This callback is used to send a valid PROXY protocol line to a socket being
Willy Tarreauafad0e02012-08-09 14:45:22 +0200318 * established. It returns 0 if it fails in a fatal way or needs to poll to go
319 * further, otherwise it returns non-zero and removes itself from the connection's
Willy Tarreaua1a74742012-08-24 12:14:49 +0200320 * flags (the bit is provided in <flag> by the caller). It is designed to be
321 * called by the connection handler and relies on it to commit polling changes.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200322 * Note that it can emit a PROXY line by relying on the other end's address
323 * when the connection is attached to a stream interface, or by resolving the
324 * local address otherwise (also called a LOCAL line).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200325 */
326int conn_si_send_proxy(struct connection *conn, unsigned int flag)
327{
Willy Tarreau2c6be842012-07-06 17:12:34 +0200328 /* we might have been called just after an asynchronous shutw */
Willy Tarreaua1a74742012-08-24 12:14:49 +0200329 if (conn->flags & CO_FL_SOCK_WR_SH)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200330 goto out_error;
331
Willy Tarreaud02cdd22013-12-15 10:23:20 +0100332 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200333 goto out_error;
334
Willy Tarreau2c6be842012-07-06 17:12:34 +0200335 /* If we have a PROXY line to send, we'll use this to validate the
336 * connection, in which case the connection is validated only once
337 * we've sent the whole proxy line. Otherwise we use connect().
338 */
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200339 while (conn->send_proxy_ofs) {
Willy Tarreau2c6be842012-07-06 17:12:34 +0200340 int ret;
341
342 /* The target server expects a PROXY line to be sent first.
343 * If the send_proxy_ofs is negative, it corresponds to the
344 * offset to start sending from then end of the proxy string
345 * (which is recomputed every time since it's constant). If
346 * it is positive, it means we have to send from the start.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200347 * We can only send a "normal" PROXY line when the connection
348 * is attached to a stream interface. Otherwise we can only
349 * send a LOCAL line (eg: for use with health checks).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200350 */
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200351 if (conn->data == &si_conn_cb) {
352 struct stream_interface *si = conn->owner;
Willy Tarreau50fe03b2014-11-28 13:59:31 +0100353 struct connection *remote = objt_conn(si_opposite(si)->end);
David Safb76832014-05-08 23:42:08 -0400354 ret = make_proxy_line(trash.str, trash.size, objt_server(conn->target), remote);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200355 }
356 else {
357 /* The target server expects a LOCAL line to be sent first. Retrieving
358 * local or remote addresses may fail until the connection is established.
359 */
360 conn_get_from_addr(conn);
361 if (!(conn->flags & CO_FL_ADDR_FROM_SET))
362 goto out_wait;
363
364 conn_get_to_addr(conn);
365 if (!(conn->flags & CO_FL_ADDR_TO_SET))
366 goto out_wait;
367
David Safb76832014-05-08 23:42:08 -0400368 ret = make_proxy_line(trash.str, trash.size, objt_server(conn->target), conn);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200369 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200370
Willy Tarreau2c6be842012-07-06 17:12:34 +0200371 if (!ret)
372 goto out_error;
373
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200374 if (conn->send_proxy_ofs > 0)
375 conn->send_proxy_ofs = -ret; /* first call */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200376
Willy Tarreaua1a74742012-08-24 12:14:49 +0200377 /* we have to send trash from (ret+sp for -sp bytes). If the
378 * data layer has a pending write, we'll also set MSG_MORE.
379 */
Willy Tarreau0a03c0f2015-03-13 00:05:28 +0100380 ret = conn_sock_send(conn, trash.str + ret + conn->send_proxy_ofs, -conn->send_proxy_ofs,
381 (conn->flags & CO_FL_DATA_WR_ENA) ? MSG_MORE : 0);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200382
Willy Tarreau0a03c0f2015-03-13 00:05:28 +0100383 if (ret < 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200384 goto out_error;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200385
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200386 conn->send_proxy_ofs += ret; /* becomes zero once complete */
387 if (conn->send_proxy_ofs != 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200388 goto out_wait;
389
390 /* OK we've sent the whole line, we're connected */
Willy Tarreau7fe45692013-12-04 23:37:56 +0100391 break;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200392 }
393
Willy Tarreaua1a74742012-08-24 12:14:49 +0200394 /* The connection is ready now, simply return and let the connection
395 * handler notify upper layers if needed.
Willy Tarreau2c6be842012-07-06 17:12:34 +0200396 */
397 if (conn->flags & CO_FL_WAIT_L4_CONN)
398 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200399 conn->flags &= ~flag;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200400 return 1;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200401
402 out_error:
Willy Tarreauafad0e02012-08-09 14:45:22 +0200403 /* Write error on the file descriptor */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200404 conn->flags |= CO_FL_ERROR;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200405 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200406
407 out_wait:
Willy Tarreaua1a74742012-08-24 12:14:49 +0200408 __conn_sock_stop_recv(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200409 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200410}
411
Willy Tarreau27375622013-12-17 00:00:28 +0100412
413/* Tiny I/O callback called on recv/send I/O events on idle connections.
414 * It simply sets the CO_FL_SOCK_RD_SH flag so that si_idle_conn_wake_cb()
415 * is notified and can kill the connection.
416 */
417static void si_idle_conn_null_cb(struct connection *conn)
418{
Willy Tarreaud85c4852015-03-13 00:40:28 +0100419 conn_sock_drain(conn);
Willy Tarreau27375622013-12-17 00:00:28 +0100420}
421
422/* Callback to be used by connection I/O handlers when some activity is detected
423 * on an idle server connection. Its main purpose is to kill the connection once
424 * a close was detected on it. It returns 0 if it did nothing serious, or -1 if
425 * it killed the connection.
426 */
427static int si_idle_conn_wake_cb(struct connection *conn)
428{
429 struct stream_interface *si = conn->owner;
430
431 if (!conn_ctrl_ready(conn))
432 return 0;
433
434 if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH)) {
435 /* warning, we can't do anything on <conn> after this call ! */
Willy Tarreauc4b56e42015-09-23 17:56:02 +0200436 si_release_endpoint(si);
Willy Tarreau27375622013-12-17 00:00:28 +0100437 return -1;
438 }
439 return 0;
440}
441
Willy Tarreau615f28b2015-09-23 18:40:09 +0200442/* This function is the equivalent to stream_int_update() except that it's
443 * designed to be called from outside the stream handlers, typically the lower
444 * layers (applets, connections) after I/O completion. After updating the stream
445 * interface and timeouts, it will try to forward what can be forwarded, then to
446 * wake the associated task up if an important event requires special handling.
447 * It should not be called from within the stream itself, stream_int_update()
448 * is designed for this.
449 */
450void stream_int_notify(struct stream_interface *si)
451{
452 struct channel *ic = si_ic(si);
453 struct channel *oc = si_oc(si);
454
455 /* process consumer side */
456 if (channel_is_empty(oc)) {
457 if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) &&
458 (si->state == SI_ST_EST))
459 si_shutw(si);
460 oc->wex = TICK_ETERNITY;
461 }
462
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100463 /* indicate that we may be waiting for data from the output channel or
464 * we're about to close and can't expect more data if SHUTW_NOW is there.
465 */
Willy Tarreau615f28b2015-09-23 18:40:09 +0200466 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && channel_may_recv(oc))
467 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100468 else if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)
469 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200470
471 /* update OC timeouts and wake the other side up if it's waiting for room */
472 if (oc->flags & CF_WRITE_ACTIVITY) {
473 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
474 !channel_is_empty(oc))
475 if (tick_isset(oc->wex))
476 oc->wex = tick_add_ifset(now_ms, oc->wto);
477
478 if (!(si->flags & SI_FL_INDEP_STR))
479 if (tick_isset(ic->rex))
480 ic->rex = tick_add_ifset(now_ms, ic->rto);
481
482 if (likely((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL &&
483 channel_may_recv(oc) &&
484 (si_opposite(si)->flags & SI_FL_WAIT_ROOM)))
485 si_chk_rcv(si_opposite(si));
486 }
487
488 /* Notify the other side when we've injected data into the IC that
489 * needs to be forwarded. We can do fast-forwarding as soon as there
490 * are output data, but we avoid doing this if some of the data are
491 * not yet scheduled for being forwarded, because it is very likely
492 * that it will be done again immediately afterwards once the following
493 * data are parsed (eg: HTTP chunking). We only SI_FL_WAIT_ROOM once
494 * we've emptied *some* of the output buffer, and not just when there
495 * is available room, because applets are often forced to stop before
496 * the buffer is full. We must not stop based on input data alone because
497 * an HTTP parser might need more data to complete the parsing.
498 */
499 if (!channel_is_empty(ic) &&
500 (si_opposite(si)->flags & SI_FL_WAIT_DATA) &&
501 (ic->buf->i == 0 || ic->pipe)) {
502 int new_len, last_len;
503
504 last_len = ic->buf->o;
505 if (ic->pipe)
506 last_len += ic->pipe->data;
507
508 si_chk_snd(si_opposite(si));
509
510 new_len = ic->buf->o;
511 if (ic->pipe)
512 new_len += ic->pipe->data;
513
514 /* check if the consumer has freed some space either in the
515 * buffer or in the pipe.
516 */
517 if (channel_may_recv(ic) && new_len < last_len)
518 si->flags &= ~SI_FL_WAIT_ROOM;
519 }
520
521 if (si->flags & SI_FL_WAIT_ROOM) {
522 ic->rex = TICK_ETERNITY;
523 }
524 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL &&
525 channel_may_recv(ic)) {
526 /* we must re-enable reading if si_chk_snd() has freed some space */
527 if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex))
528 ic->rex = tick_add_ifset(now_ms, ic->rto);
529 }
530
531 /* wake the task up only when needed */
532 if (/* changes on the production side */
533 (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
534 si->state != SI_ST_EST ||
535 (si->flags & SI_FL_ERR) ||
536 ((ic->flags & CF_READ_PARTIAL) &&
537 (!ic->to_forward || si_opposite(si)->state != SI_ST_EST)) ||
538
539 /* changes on the consumption side */
540 (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
541 ((oc->flags & CF_WRITE_ACTIVITY) &&
542 ((oc->flags & CF_SHUTW) ||
543 ((oc->flags & CF_WAKE_WRITE) &&
544 (si_opposite(si)->state != SI_ST_EST ||
545 (channel_is_empty(oc) && !oc->to_forward)))))) {
546 task_wakeup(si_task(si), TASK_WOKEN_IO);
547 }
548 if (ic->flags & CF_READ_ACTIVITY)
549 ic->flags &= ~CF_READ_DONTWAIT;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200550}
551
552
Willy Tarreau651e1822015-09-23 20:06:13 +0200553/* Callback to be used by connection I/O handlers upon completion. It propagates
554 * connection flags to the stream interface, updates the stream (which may or
555 * may not take this opportunity to try to forward data), then update the
556 * connection's polling based on the channels and stream interface's final
557 * states. The function always returns 0.
Willy Tarreau100c4672012-08-20 12:06:26 +0200558 */
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200559static int si_conn_wake_cb(struct connection *conn)
Willy Tarreaufd31e532012-07-23 18:24:25 +0200560{
Willy Tarreaue603e692012-09-27 22:20:41 +0200561 struct stream_interface *si = conn->owner;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100562 struct channel *ic = si_ic(si);
563 struct channel *oc = si_oc(si);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200564
Willy Tarreau651e1822015-09-23 20:06:13 +0200565 /* First step, report to the stream-int what was detected at the
566 * connection layer : errors and connection establishment.
567 */
Willy Tarreau3c55ec22012-07-23 19:19:51 +0200568 if (conn->flags & CO_FL_ERROR)
569 si->flags |= SI_FL_ERR;
570
Willy Tarreau52821e22017-03-18 17:11:37 +0100571 if ((si->state < SI_ST_EST) &&
572 (conn->flags & (CO_FL_CONNECTED | CO_FL_HANDSHAKE)) == CO_FL_CONNECTED) {
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200573 si->exp = TICK_ETERNITY;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100574 oc->flags |= CF_WRITE_NULL;
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200575 }
576
Willy Tarreau651e1822015-09-23 20:06:13 +0200577 /* Second step : update the stream-int and channels, try to forward any
578 * pending data, then possibly wake the stream up based on the new
579 * stream-int status.
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200580 */
Willy Tarreau651e1822015-09-23 20:06:13 +0200581 stream_int_notify(si);
Christopher Fauleta73e59b2016-12-09 17:30:18 +0100582 channel_release_buffer(ic, &(si_strm(si)->buffer_wait));
Willy Tarreauea3cc482015-09-23 19:37:00 +0200583
Willy Tarreau651e1822015-09-23 20:06:13 +0200584 /* Third step : update the connection's polling status based on what
585 * was done above (eg: maybe some buffers got emptied).
586 */
587 if (channel_is_empty(oc))
588 __conn_data_stop_send(conn);
Willy Tarreauea3cc482015-09-23 19:37:00 +0200589
Willy Tarreaufd31e532012-07-23 18:24:25 +0200590
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200591 if (si->flags & SI_FL_WAIT_ROOM) {
Willy Tarreauf16723e2012-08-24 12:52:22 +0200592 __conn_data_stop_recv(conn);
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200593 }
Willy Tarreauafc8a222014-11-28 15:46:27 +0100594 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL &&
595 channel_may_recv(ic)) {
Willy Tarreau9f7c6a12012-11-19 16:43:14 +0100596 __conn_data_want_recv(conn);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200597 }
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200598 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200599}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200600
Willy Tarreau5368d802012-08-21 18:22:06 +0200601/*
602 * This function is called to send buffer data to a stream socket.
Godbache68e02d2013-10-11 15:48:29 +0800603 * It calls the transport layer's snd_buf function. It relies on the
Godbach4f489902013-12-04 17:24:06 +0800604 * caller to commit polling changes. The caller should check conn->flags
605 * for errors.
Willy Tarreau5368d802012-08-21 18:22:06 +0200606 */
Godbach4f489902013-12-04 17:24:06 +0800607static void si_conn_send(struct connection *conn)
Willy Tarreau5368d802012-08-21 18:22:06 +0200608{
Willy Tarreaue603e692012-09-27 22:20:41 +0200609 struct stream_interface *si = conn->owner;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100610 struct channel *oc = si_oc(si);
Willy Tarreau5368d802012-08-21 18:22:06 +0200611 int ret;
612
Willy Tarreauafc8a222014-11-28 15:46:27 +0100613 if (oc->pipe && conn->xprt->snd_pipe) {
614 ret = conn->xprt->snd_pipe(conn, oc->pipe);
Willy Tarreau96199b12012-08-24 00:46:52 +0200615 if (ret > 0)
Willy Tarreauafc8a222014-11-28 15:46:27 +0100616 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Willy Tarreau5368d802012-08-21 18:22:06 +0200617
Willy Tarreauafc8a222014-11-28 15:46:27 +0100618 if (!oc->pipe->data) {
619 put_pipe(oc->pipe);
620 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200621 }
622
Willy Tarreau96199b12012-08-24 00:46:52 +0200623 if (conn->flags & CO_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +0800624 return;
Willy Tarreau5368d802012-08-21 18:22:06 +0200625 }
626
627 /* At this point, the pipe is empty, but we may still have data pending
628 * in the normal buffer.
629 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100630 if (!oc->buf->o)
Godbach4f489902013-12-04 17:24:06 +0800631 return;
Willy Tarreau5368d802012-08-21 18:22:06 +0200632
Godbache68e02d2013-10-11 15:48:29 +0800633 /* when we're here, we already know that there is no spliced
Willy Tarreau5368d802012-08-21 18:22:06 +0200634 * data left, and that there are sendable buffered data.
635 */
Willy Tarreau310987a2014-01-22 19:46:33 +0100636 if (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_DATA_WR_SH | CO_FL_WAIT_DATA | CO_FL_HANDSHAKE))) {
Willy Tarreau5368d802012-08-21 18:22:06 +0200637 /* check if we want to inform the kernel that we're interested in
638 * sending more data after this call. We want this if :
639 * - we're about to close after this last send and want to merge
640 * the ongoing FIN with the last segment.
641 * - we know we can't send everything at once and must get back
642 * here because of unaligned data
643 * - there is still a finite amount of data to forward
644 * The test is arranged so that the most common case does only 2
645 * tests.
646 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100647 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200648
Willy Tarreauafc8a222014-11-28 15:46:27 +0100649 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
650 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
651 (oc->flags & CF_EXPECT_MORE))) ||
652 ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100653 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200654
Willy Tarreauafc8a222014-11-28 15:46:27 +0100655 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100656 send_flag |= CO_SFL_STREAMER;
657
Willy Tarreauafc8a222014-11-28 15:46:27 +0100658 ret = conn->xprt->snd_buf(conn, oc->buf, send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800659 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +0100660 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Willy Tarreau5368d802012-08-21 18:22:06 +0200661
Willy Tarreauafc8a222014-11-28 15:46:27 +0100662 if (!oc->buf->o) {
Godbache68e02d2013-10-11 15:48:29 +0800663 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100664 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800665 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200666
Godbache68e02d2013-10-11 15:48:29 +0800667 /* if some data remain in the buffer, it's only because the
668 * system buffers are full, we will try next time.
669 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200670 }
Godbache68e02d2013-10-11 15:48:29 +0800671 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200672}
673
Willy Tarreau25f13102015-09-24 11:32:22 +0200674/* This function is designed to be called from within the stream handler to
675 * update the channels' expiration timers and the stream interface's flags
676 * based on the channels' flags. It needs to be called only once after the
677 * channels' flags have settled down, and before they are cleared, though it
678 * doesn't harm to call it as often as desired (it just slightly hurts
679 * performance). It must not be called from outside of the stream handler,
680 * as what it does will be used to compute the stream task's expiration.
681 */
682void stream_int_update(struct stream_interface *si)
683{
684 struct channel *ic = si_ic(si);
685 struct channel *oc = si_oc(si);
686
687 if (!(ic->flags & CF_SHUTR)) {
688 /* Read not closed, update FD status and timeout for reads */
689 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
690 /* stop reading */
691 if (!(si->flags & SI_FL_WAIT_ROOM)) {
692 if (!(ic->flags & CF_DONT_READ)) /* full */
693 si->flags |= SI_FL_WAIT_ROOM;
694 ic->rex = TICK_ETERNITY;
695 }
696 }
697 else {
698 /* (re)start reading and update timeout. Note: we don't recompute the timeout
699 * everytime we get here, otherwise it would risk never to expire. We only
700 * update it if is was not yet set. The stream socket handler will already
701 * have updated it if there has been a completed I/O.
702 */
703 si->flags &= ~SI_FL_WAIT_ROOM;
704 if (!(ic->flags & (CF_READ_NOEXP|CF_DONT_READ)) && !tick_isset(ic->rex))
705 ic->rex = tick_add_ifset(now_ms, ic->rto);
706 }
707 }
708
709 if (!(oc->flags & CF_SHUTW)) {
710 /* Write not closed, update FD status and timeout for writes */
711 if (channel_is_empty(oc)) {
712 /* stop writing */
713 if (!(si->flags & SI_FL_WAIT_DATA)) {
714 if ((oc->flags & CF_SHUTW_NOW) == 0)
715 si->flags |= SI_FL_WAIT_DATA;
716 oc->wex = TICK_ETERNITY;
717 }
718 }
719 else {
720 /* (re)start writing and update timeout. Note: we don't recompute the timeout
721 * everytime we get here, otherwise it would risk never to expire. We only
722 * update it if is was not yet set. The stream socket handler will already
723 * have updated it if there has been a completed I/O.
724 */
725 si->flags &= ~SI_FL_WAIT_DATA;
726 if (!tick_isset(oc->wex)) {
727 oc->wex = tick_add_ifset(now_ms, oc->wto);
728 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
729 /* Note: depending on the protocol, we don't know if we're waiting
730 * for incoming data or not. So in order to prevent the socket from
731 * expiring read timeouts during writes, we refresh the read timeout,
732 * except if it was already infinite or if we have explicitly setup
733 * independent streams.
734 */
735 ic->rex = tick_add_ifset(now_ms, ic->rto);
736 }
737 }
738 }
739 }
740}
741
Willy Tarreau452c7d52015-09-25 10:39:16 +0200742/* Updates the polling status of a connection outside of the connection handler
743 * based on the channel's flags and the stream interface's flags. It needs to be
744 * called once after the channels' flags have settled down and the stream has
745 * been updated. It is not designed to be called from within the connection
746 * handler itself.
Willy Tarreau100c4672012-08-20 12:06:26 +0200747 */
748void stream_int_update_conn(struct stream_interface *si)
749{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100750 struct channel *ic = si_ic(si);
751 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200752 struct connection *conn = __objt_conn(si->end);
Willy Tarreau100c4672012-08-20 12:06:26 +0200753
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200754 if (!(ic->flags & CF_SHUTR)) {
755 /* Read not closed */
756 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic))
757 __conn_data_stop_recv(conn);
758 else
759 __conn_data_want_recv(conn);
760 }
761
762 if (!(oc->flags & CF_SHUTW)) {
763 /* Write not closed */
764 if (channel_is_empty(oc))
765 __conn_data_stop_send(conn);
766 else
767 __conn_data_want_send(conn);
768 }
769
770 conn_cond_update_data_polling(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200771}
772
773/*
774 * This function performs a shutdown-read on a stream interface attached to
775 * a connection in a connected or init state (it does nothing for other
776 * states). It either shuts the read side or marks itself as closed. The buffer
777 * flags are updated to reflect the new state. If the stream interface has
778 * SI_FL_NOHALF, we also forward the close to the write side. If a control
779 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +0200780 * descriptors are then shutdown or closed accordingly. The function
781 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200782 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200783static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200784{
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200785 struct connection *conn = __objt_conn(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100786 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200787
Willy Tarreauafc8a222014-11-28 15:46:27 +0100788 ic->flags &= ~CF_SHUTR_NOW;
789 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200790 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100791 ic->flags |= CF_SHUTR;
792 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200793 si->flags &= ~SI_FL_WAIT_ROOM;
794
795 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200796 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200797
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100798 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau6fe15412013-09-29 15:16:03 +0200799 conn_full_close(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200800 si->state = SI_ST_DIS;
801 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200802 }
803 else if (si->flags & SI_FL_NOHALF) {
804 /* we want to immediately forward this close to the write side */
805 return stream_int_shutw_conn(si);
806 }
807 else if (conn->ctrl) {
808 /* we want the caller to disable polling on this FD */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200809 conn_data_stop_recv(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200810 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200811}
812
813/*
814 * This function performs a shutdown-write on a stream interface attached to
815 * a connection in a connected or init state (it does nothing for other
816 * states). It either shuts the write side or marks itself as closed. The
817 * buffer flags are updated to reflect the new state. It does also close
818 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +0100819 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200820 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200821static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200822{
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200823 struct connection *conn = __objt_conn(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100824 struct channel *ic = si_ic(si);
825 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200826
Willy Tarreauafc8a222014-11-28 15:46:27 +0100827 oc->flags &= ~CF_SHUTW_NOW;
828 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200829 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100830 oc->flags |= CF_SHUTW;
831 oc->wex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200832 si->flags &= ~SI_FL_WAIT_DATA;
833
Hongbo Longe39683c2017-03-10 18:41:51 +0100834 if (tick_isset(si->hcto)) {
835 ic->rto = si->hcto;
836 ic->rex = tick_add(now_ms, ic->rto);
837 }
838
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200839 switch (si->state) {
840 case SI_ST_EST:
841 /* we have to shut before closing, otherwise some short messages
842 * may never leave the system, especially when there are remaining
843 * unread data in the socket input buffer, or when nolinger is set.
844 * However, if SI_FL_NOLINGER is explicitly set, we know there is
845 * no risk so we close both sides immediately.
846 */
847 if (si->flags & SI_FL_ERR) {
848 /* quick close, the socket is alredy shut anyway */
849 }
850 else if (si->flags & SI_FL_NOLINGER) {
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200851 /* unclean data-layer shutdown */
Willy Tarreau1398aa12015-03-12 23:04:07 +0100852 conn_data_shutw_hard(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200853 }
854 else {
855 /* clean data-layer shutdown */
Willy Tarreau1398aa12015-03-12 23:04:07 +0100856 conn_data_shutw(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200857
858 /* If the stream interface is configured to disable half-open
859 * connections, we'll skip the shutdown(), but only if the
860 * read size is already closed. Otherwise we can't support
861 * closed write with pending read (eg: abortonclose while
862 * waiting for the server).
863 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100864 if (!(si->flags & SI_FL_NOHALF) || !(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200865 /* We shutdown transport layer */
Willy Tarreau4dfd54f2015-03-12 22:44:53 +0100866 conn_sock_shutw(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200867
Willy Tarreauafc8a222014-11-28 15:46:27 +0100868 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200869 /* OK just a shutw, but we want the caller
870 * to disable polling on this FD if exists.
871 */
Willy Tarreau1398aa12015-03-12 23:04:07 +0100872 conn_cond_update_polling(conn);
Willy Tarreau6fe15412013-09-29 15:16:03 +0200873 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200874 }
875 }
876 }
877
878 /* fall through */
879 case SI_ST_CON:
880 /* we may have to close a pending connection, and mark the
881 * response buffer as shutr
882 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200883 conn_full_close(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200884 /* fall through */
885 case SI_ST_CER:
886 case SI_ST_QUE:
887 case SI_ST_TAR:
888 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +0200889 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200890 default:
891 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100892 ic->flags &= ~CF_SHUTR_NOW;
893 ic->flags |= CF_SHUTR;
894 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200895 si->exp = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +0200896 }
897}
898
Willy Tarreau46a8d922012-08-20 12:38:36 +0200899/* This function is used for inter-stream-interface calls. It is called by the
900 * consumer to inform the producer side that it may be interested in checking
901 * for free space in the buffer. Note that it intentionally does not update
902 * timeouts, so that we can still check them later at wake-up. This function is
903 * dedicated to connection-based stream interfaces.
904 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200905static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +0200906{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100907 struct channel *ic = si_ic(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200908 struct connection *conn = __objt_conn(si->end);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200909
Willy Tarreauafc8a222014-11-28 15:46:27 +0100910 if (unlikely(si->state > SI_ST_EST || (ic->flags & CF_SHUTR)))
Willy Tarreau46a8d922012-08-20 12:38:36 +0200911 return;
912
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200913 conn_refresh_polling_flags(conn);
Willy Tarreau7d281492012-12-16 19:19:13 +0100914
Willy Tarreauafc8a222014-11-28 15:46:27 +0100915 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
Willy Tarreau46a8d922012-08-20 12:38:36 +0200916 /* stop reading */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100917 if (!(ic->flags & CF_DONT_READ)) /* full */
Willy Tarreau46a8d922012-08-20 12:38:36 +0200918 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200919 __conn_data_stop_recv(conn);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200920 }
921 else {
922 /* (re)start reading */
923 si->flags &= ~SI_FL_WAIT_ROOM;
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200924 __conn_data_want_recv(conn);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200925 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200926 conn_cond_update_data_polling(conn);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200927}
928
929
Willy Tarreaude5722c2012-08-20 15:01:10 +0200930/* This function is used for inter-stream-interface calls. It is called by the
931 * producer to inform the consumer side that it may be interested in checking
932 * for data in the buffer. Note that it intentionally does not update timeouts,
933 * so that we can still check them later at wake-up.
934 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200935static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +0200936{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100937 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200938 struct connection *conn = __objt_conn(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +0200939
Willy Tarreauafc8a222014-11-28 15:46:27 +0100940 if (unlikely(si->state > SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +0200941 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +0200942
Willy Tarreauafc8a222014-11-28 15:46:27 +0100943 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +0200944 return;
945
Willy Tarreauafc8a222014-11-28 15:46:27 +0100946 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +0100947 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +0200948 return;
949
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200950 if (conn->flags & (CO_FL_DATA_WR_ENA|CO_FL_CURR_WR_ENA)) {
Willy Tarreau5007d2a2013-07-18 22:09:48 +0200951 /* already subscribed to write notifications, will be called
952 * anyway, so let's avoid calling it especially if the reader
953 * is not ready.
954 */
955 return;
956 }
957
Willy Tarreau708e7172014-01-21 10:27:49 +0100958 /* Before calling the data-level operations, we have to prepare
959 * the polling flags to ensure we properly detect changes.
960 */
961 conn_refresh_polling_flags(conn);
962 __conn_data_want_send(conn);
Willy Tarreaud29a0662012-12-10 16:33:38 +0100963
Willy Tarreau708e7172014-01-21 10:27:49 +0100964 if (!(conn->flags & (CO_FL_HANDSHAKE|CO_FL_WAIT_L4_CONN|CO_FL_WAIT_L6_CONN))) {
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200965 si_conn_send(conn);
Willy Tarreau798c3c92014-01-21 10:30:08 +0100966 if (conn->flags & CO_FL_ERROR) {
Willy Tarreaud29a0662012-12-10 16:33:38 +0100967 /* Write error on the file descriptor */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200968 __conn_data_stop_both(conn);
Willy Tarreaud29a0662012-12-10 16:33:38 +0100969 si->flags |= SI_FL_ERR;
Willy Tarreaud29a0662012-12-10 16:33:38 +0100970 goto out_wakeup;
971 }
Willy Tarreaude5722c2012-08-20 15:01:10 +0200972 }
973
974 /* OK, so now we know that some data might have been sent, and that we may
975 * have to poll first. We have to do that too if the buffer is not empty.
976 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100977 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +0200978 /* the connection is established but we can't write. Either the
979 * buffer is empty, or we just refrain from sending because the
980 * ->o limit was reached. Maybe we just wrote the last
981 * chunk and need to close.
982 */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200983 __conn_data_stop_send(conn);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100984 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200985 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreaude5722c2012-08-20 15:01:10 +0200986 (si->state == SI_ST_EST)) {
987 si_shutw(si);
988 goto out_wakeup;
989 }
990
Willy Tarreauafc8a222014-11-28 15:46:27 +0100991 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +0200992 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100993 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +0200994 }
995 else {
996 /* Otherwise there are remaining data to be sent in the buffer,
997 * which means we have to poll before doing so.
998 */
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200999 __conn_data_want_send(conn);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001000 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001001 if (!tick_isset(oc->wex))
1002 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001003 }
1004
Willy Tarreauafc8a222014-11-28 15:46:27 +01001005 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1006 struct channel *ic = si_ic(si);
1007
Willy Tarreaude5722c2012-08-20 15:01:10 +02001008 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001009 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1010 !channel_is_empty(oc))
1011 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001012
Willy Tarreauafc8a222014-11-28 15:46:27 +01001013 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001014 /* Note: to prevent the client from expiring read timeouts
1015 * during writes, we refresh it. We only do this if the
1016 * interface is not configured for "independent streams",
1017 * because for some applications it's better not to do this,
1018 * for instance when continuously exchanging small amounts
1019 * of data which can full the socket buffers long before a
1020 * write timeout is detected.
1021 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001022 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001023 }
1024 }
1025
1026 /* in case of special condition (error, shutdown, end of write...), we
1027 * have to notify the task.
1028 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001029 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1030 ((oc->flags & CF_WAKE_WRITE) &&
1031 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreaue6300be2014-01-25 02:33:21 +01001032 si->state != SI_ST_EST)))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001033 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001034 if (!(si->flags & SI_FL_DONT_WAKE))
1035 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001036 }
Willy Tarreauf16723e2012-08-24 12:52:22 +02001037
1038 /* commit possible polling changes */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001039 conn_cond_update_polling(conn);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001040}
1041
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001042/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001043 * This is the callback which is called by the connection layer to receive data
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001044 * into the buffer from the connection. It iterates over the transport layer's
1045 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001046 */
Willy Tarreau4aa36832012-10-02 20:07:22 +02001047static void si_conn_recv_cb(struct connection *conn)
Willy Tarreauce323de2012-08-20 21:41:06 +02001048{
Willy Tarreaue603e692012-09-27 22:20:41 +02001049 struct stream_interface *si = conn->owner;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001050 struct channel *ic = si_ic(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001051 int ret, max, cur_read;
1052 int read_poll = MAX_READ_POLL_LOOPS;
1053
1054 /* stop immediately on errors. Note that we DON'T want to stop on
1055 * POLL_ERR, as the poller might report a write error while there
1056 * are still data available in the recv buffer. This typically
1057 * happens when we send too large a request to a backend server
1058 * which rejects it before reading it all.
1059 */
1060 if (conn->flags & CO_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001061 return;
Willy Tarreauce323de2012-08-20 21:41:06 +02001062
1063 /* stop here if we reached the end of data */
1064 if (conn_data_read0_pending(conn))
1065 goto out_shutdown_r;
1066
1067 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001068 if (ic->flags & CF_SHUTR)
Willy Tarreauce323de2012-08-20 21:41:06 +02001069 return;
1070
Willy Tarreau96199b12012-08-24 00:46:52 +02001071 cur_read = 0;
Willy Tarreau96199b12012-08-24 00:46:52 +02001072
Willy Tarreauafc8a222014-11-28 15:46:27 +01001073 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !ic->buf->o &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001074 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001075 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001076 /* The buffer was empty and nothing was transferred for more
1077 * than one second. This was caused by a pause and not by
1078 * congestion. Reset any streaming mode to reduce latency.
1079 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001080 ic->xfer_small = 0;
1081 ic->xfer_large = 0;
1082 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001083 }
1084
Willy Tarreau96199b12012-08-24 00:46:52 +02001085 /* First, let's see if we may splice data across the channel without
1086 * using a buffer.
1087 */
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001088 if (conn->xprt->rcv_pipe &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001089 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1090 ic->flags & CF_KERN_SPLICING) {
1091 if (buffer_not_empty(ic->buf)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001092 /* We're embarrassed, there are already data pending in
1093 * the buffer and we don't want to have them at two
1094 * locations at a time. Let's indicate we need some
1095 * place and ask the consumer to hurry.
1096 */
1097 goto abort_splice;
1098 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001099
Willy Tarreauafc8a222014-11-28 15:46:27 +01001100 if (unlikely(ic->pipe == NULL)) {
1101 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1102 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001103 goto abort_splice;
1104 }
1105 }
1106
Willy Tarreauafc8a222014-11-28 15:46:27 +01001107 ret = conn->xprt->rcv_pipe(conn, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001108 if (ret < 0) {
1109 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001110 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001111 goto abort_splice;
1112 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001113
Willy Tarreau96199b12012-08-24 00:46:52 +02001114 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001115 if (ic->to_forward != CHN_INFINITE_FORWARD)
1116 ic->to_forward -= ret;
1117 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001118 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001119 ic->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +02001120 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001121
1122 if (conn_data_read0_pending(conn))
1123 goto out_shutdown_r;
1124
1125 if (conn->flags & CO_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001126 return;
Willy Tarreau96199b12012-08-24 00:46:52 +02001127
Willy Tarreau61d39a02013-07-18 21:49:32 +02001128 if (conn->flags & CO_FL_WAIT_ROOM) {
1129 /* the pipe is full or we have read enough data that it
1130 * could soon be full. Let's stop before needing to poll.
1131 */
Willy Tarreau56a77e52012-09-02 18:34:44 +02001132 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreau61d39a02013-07-18 21:49:32 +02001133 __conn_data_stop_recv(conn);
1134 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001135
Willy Tarreauce323de2012-08-20 21:41:06 +02001136 /* splice not possible (anymore), let's go on on standard copy */
1137 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001138
1139 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001140 if (ic->pipe && unlikely(!ic->pipe->data)) {
1141 put_pipe(ic->pipe);
1142 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001143 }
1144
Christopher Fauleta73e59b2016-12-09 17:30:18 +01001145 /* now we'll need a input buffer for the stream */
1146 if (!channel_alloc_buffer(ic, &(si_strm(si)->buffer_wait))) {
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001147 si->flags |= SI_FL_WAIT_ROOM;
1148 goto end_recv;
1149 }
1150
Willy Tarreau61d39a02013-07-18 21:49:32 +02001151 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1152 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1153 * that if such an event is not handled above in splice, it will be handled here by
1154 * recv().
1155 */
Willy Tarreau310987a2014-01-22 19:46:33 +01001156 while (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_DATA_RD_SH | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE))) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001157 max = channel_recv_max(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001158
1159 if (!max) {
Willy Tarreau56a77e52012-09-02 18:34:44 +02001160 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreauce323de2012-08-20 21:41:06 +02001161 break;
1162 }
1163
Willy Tarreauafc8a222014-11-28 15:46:27 +01001164 ret = conn->xprt->rcv_buf(conn, ic->buf, max);
Willy Tarreauce323de2012-08-20 21:41:06 +02001165 if (ret <= 0)
1166 break;
1167
1168 cur_read += ret;
1169
1170 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001171 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001172 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001173 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1174 if (fwd > ic->to_forward)
1175 fwd = ic->to_forward;
1176 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001177 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001178 b_adv(ic->buf, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001179 }
1180
Willy Tarreauafc8a222014-11-28 15:46:27 +01001181 ic->flags |= CF_READ_PARTIAL;
1182 ic->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001183
Willy Tarreauafc8a222014-11-28 15:46:27 +01001184 if (!channel_may_recv(ic)) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001185 si->flags |= SI_FL_WAIT_ROOM;
1186 break;
1187 }
1188
Willy Tarreauafc8a222014-11-28 15:46:27 +01001189 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
Willy Tarreau796c5b72016-11-29 21:47:02 +01001190 if (__conn_data_done_recv(conn))
1191 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreauce323de2012-08-20 21:41:06 +02001192 break;
Willy Tarreau5fddab02012-11-09 18:27:26 +01001193 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001194
1195 /* if too many bytes were missing from last read, it means that
1196 * it's pointless trying to read again because the system does
1197 * not have them in buffers.
1198 */
1199 if (ret < max) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001200 /* if a streamer has read few data, it may be because we
1201 * have exhausted system buffers. It's not worth trying
1202 * again.
1203 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001204 if (ic->flags & CF_STREAMER)
Willy Tarreauce323de2012-08-20 21:41:06 +02001205 break;
1206
1207 /* if we read a large block smaller than what we requested,
1208 * it's almost certain we'll never get anything more.
1209 */
1210 if (ret >= global.tune.recv_enough)
1211 break;
1212 }
1213 } /* while !flags */
1214
Willy Tarreauc5890e62014-02-09 17:47:01 +01001215 if (cur_read) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001216 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
1217 (cur_read <= ic->buf->size / 2)) {
1218 ic->xfer_large = 0;
1219 ic->xfer_small++;
1220 if (ic->xfer_small >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001221 /* we have read less than half of the buffer in
1222 * one pass, and this happened at least 3 times.
1223 * This is definitely not a streamer.
1224 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001225 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001226 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001227 else if (ic->xfer_small >= 2) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001228 /* if the buffer has been at least half full twice,
1229 * we receive faster than we send, so at least it
1230 * is not a "fast streamer".
1231 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001232 ic->flags &= ~CF_STREAMER_FAST;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001233 }
1234 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001235 else if (!(ic->flags & CF_STREAMER_FAST) &&
1236 (cur_read >= ic->buf->size - global.tune.maxrewrite)) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001237 /* we read a full buffer at once */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001238 ic->xfer_small = 0;
1239 ic->xfer_large++;
1240 if (ic->xfer_large >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001241 /* we call this buffer a fast streamer if it manages
1242 * to be filled in one call 3 consecutive times.
1243 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001244 ic->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001245 }
1246 }
1247 else {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001248 ic->xfer_small = 0;
1249 ic->xfer_large = 0;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001250 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001251 ic->last_read = now_ms;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001252 }
1253
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001254 end_recv:
1255 if (conn->flags & CO_FL_ERROR)
1256 return;
1257
Willy Tarreauce323de2012-08-20 21:41:06 +02001258 if (conn_data_read0_pending(conn))
1259 /* connection closed */
1260 goto out_shutdown_r;
1261
1262 return;
1263
1264 out_shutdown_r:
1265 /* we received a shutdown */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001266 ic->flags |= CF_READ_NULL;
1267 if (ic->flags & CF_AUTO_CLOSE)
1268 channel_shutw_now(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001269 stream_sock_read0(si);
1270 conn_data_read0(conn);
1271 return;
Willy Tarreauce323de2012-08-20 21:41:06 +02001272}
1273
1274/*
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001275 * This is the callback which is called by the connection layer to send data
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001276 * from the buffer to the connection. It iterates over the transport layer's
1277 * snd_buf function.
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001278 */
Willy Tarreau4aa36832012-10-02 20:07:22 +02001279static void si_conn_send_cb(struct connection *conn)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001280{
Willy Tarreaue603e692012-09-27 22:20:41 +02001281 struct stream_interface *si = conn->owner;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001282
1283 if (conn->flags & CO_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001284 return;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001285
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001286 if (conn->flags & CO_FL_HANDSHAKE)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001287 /* a handshake was requested */
1288 return;
1289
1290 /* we might have been called just after an asynchronous shutw */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001291 if (si_oc(si)->flags & CF_SHUTW)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001292 return;
1293
1294 /* OK there are data waiting to be sent */
Godbach4f489902013-12-04 17:24:06 +08001295 si_conn_send(conn);
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001296
1297 /* OK all done */
1298 return;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001299}
1300
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001301/*
1302 * This function propagates a null read received on a socket-based connection.
1303 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001304 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001305 */
1306void stream_sock_read0(struct stream_interface *si)
1307{
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001308 struct connection *conn = __objt_conn(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001309 struct channel *ic = si_ic(si);
1310 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001311
Willy Tarreauafc8a222014-11-28 15:46:27 +01001312 ic->flags &= ~CF_SHUTR_NOW;
1313 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001314 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001315 ic->flags |= CF_SHUTR;
1316 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001317 si->flags &= ~SI_FL_WAIT_ROOM;
1318
1319 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1320 return;
1321
Willy Tarreauafc8a222014-11-28 15:46:27 +01001322 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001323 goto do_close;
1324
1325 if (si->flags & SI_FL_NOHALF) {
1326 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001327 /* force flag on ssl to keep stream in cache */
Willy Tarreau1398aa12015-03-12 23:04:07 +01001328 conn_data_shutw_hard(conn);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001329 goto do_close;
1330 }
1331
1332 /* otherwise that's just a normal read shutdown */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001333 __conn_data_stop_recv(conn);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001334 return;
1335
1336 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001337 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001338 conn_full_close(conn);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001339
Willy Tarreauafc8a222014-11-28 15:46:27 +01001340 ic->flags &= ~CF_SHUTR_NOW;
1341 ic->flags |= CF_SHUTR;
1342 ic->rex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001343
Willy Tarreauafc8a222014-11-28 15:46:27 +01001344 oc->flags &= ~CF_SHUTW_NOW;
1345 oc->flags |= CF_SHUTW;
1346 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001347
1348 si->flags &= ~(SI_FL_WAIT_DATA | SI_FL_WAIT_ROOM);
1349
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001350 si->state = SI_ST_DIS;
1351 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001352 return;
1353}
1354
Willy Tarreau651e1822015-09-23 20:06:13 +02001355/* Callback to be used by applet handlers upon completion. It updates the stream
1356 * (which may or may not take this opportunity to try to forward data), then
1357 * may disable the applet's based on the channels and stream interface's final
1358 * states.
1359 */
Willy Tarreauaa977ba2015-09-25 11:45:06 +02001360void si_applet_wake_cb(struct stream_interface *si)
Willy Tarreaue5f86492015-04-19 15:16:35 +02001361{
Willy Tarreaueca572f2015-09-25 19:11:55 +02001362 struct channel *ic = si_ic(si);
1363
1364 /* If the applet wants to write and the channel is closed, it's a
1365 * broken pipe and it must be reported.
1366 */
1367 if ((si->flags & SI_FL_WANT_PUT) && (ic->flags & CF_SHUTR))
1368 si->flags |= SI_FL_ERR;
1369
Willy Tarreau651e1822015-09-23 20:06:13 +02001370 /* update the stream-int, channels, and possibly wake the stream up */
1371 stream_int_notify(si);
Willy Tarreau388a2382015-09-23 19:55:42 +02001372
1373 /* Get away from the active list if we can't work anymore.
1374 * We also do that if the main task has already scheduled, because it
1375 * saves a useless wakeup/pause/wakeup cycle causing one useless call
1376 * per session on average.
1377 */
1378 if (task_in_rq(si_task(si)) ||
1379 (((si->flags & (SI_FL_WANT_PUT|SI_FL_WAIT_ROOM)) != SI_FL_WANT_PUT) &&
1380 ((si->flags & (SI_FL_WANT_GET|SI_FL_WAIT_DATA)) != SI_FL_WANT_GET)))
1381 appctx_pause(si_appctx(si));
Willy Tarreaue5f86492015-04-19 15:16:35 +02001382}
1383
Willy Tarreau452c7d52015-09-25 10:39:16 +02001384
1385/* Updates the activity status of an applet outside of the applet handler based
1386 * on the channel's flags and the stream interface's flags. It needs to be
1387 * called once after the channels' flags have settled down and the stream has
1388 * been updated. It is not designed to be called from within the applet handler
1389 * itself.
Willy Tarreau563cc372015-04-19 18:13:56 +02001390 */
1391void stream_int_update_applet(struct stream_interface *si)
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001392{
Willy Tarreaufe127932015-04-21 19:23:39 +02001393 if (((si->flags & (SI_FL_WANT_PUT|SI_FL_WAIT_ROOM)) == SI_FL_WANT_PUT) ||
1394 ((si->flags & (SI_FL_WANT_GET|SI_FL_WAIT_DATA)) == SI_FL_WANT_GET))
Willy Tarreau563cc372015-04-19 18:13:56 +02001395 appctx_wakeup(si_appctx(si));
Willy Tarreaufe127932015-04-21 19:23:39 +02001396 else
1397 appctx_pause(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001398}
1399
1400/*
1401 * This function performs a shutdown-read on a stream interface attached to an
1402 * applet in a connected or init state (it does nothing for other states). It
1403 * either shuts the read side or marks itself as closed. The buffer flags are
1404 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1405 * we also forward the close to the write side. The owner task is woken up if
1406 * it exists.
1407 */
1408static void stream_int_shutr_applet(struct stream_interface *si)
1409{
1410 struct channel *ic = si_ic(si);
1411
1412 ic->flags &= ~CF_SHUTR_NOW;
1413 if (ic->flags & CF_SHUTR)
1414 return;
1415 ic->flags |= CF_SHUTR;
1416 ic->rex = TICK_ETERNITY;
1417 si->flags &= ~SI_FL_WAIT_ROOM;
1418
Willy Tarreau828824a2015-04-19 17:20:03 +02001419 /* Note: on shutr, we don't call the applet */
1420
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001421 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1422 return;
1423
1424 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau958f0742015-09-25 20:24:26 +02001425 si_applet_release(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001426 si->state = SI_ST_DIS;
1427 si->exp = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001428 }
1429 else if (si->flags & SI_FL_NOHALF) {
1430 /* we want to immediately forward this close to the write side */
1431 return stream_int_shutw_applet(si);
1432 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001433}
1434
1435/*
1436 * This function performs a shutdown-write on a stream interface attached to an
1437 * applet in a connected or init state (it does nothing for other states). It
1438 * either shuts the write side or marks itself as closed. The buffer flags are
1439 * updated to reflect the new state. It does also close everything if the SI
1440 * was marked as being in error state. The owner task is woken up if it exists.
1441 */
1442static void stream_int_shutw_applet(struct stream_interface *si)
1443{
1444 struct channel *ic = si_ic(si);
1445 struct channel *oc = si_oc(si);
1446
1447 oc->flags &= ~CF_SHUTW_NOW;
1448 if (oc->flags & CF_SHUTW)
1449 return;
1450 oc->flags |= CF_SHUTW;
1451 oc->wex = TICK_ETERNITY;
1452 si->flags &= ~SI_FL_WAIT_DATA;
1453
Hongbo Longe39683c2017-03-10 18:41:51 +01001454 if (tick_isset(si->hcto)) {
1455 ic->rto = si->hcto;
1456 ic->rex = tick_add(now_ms, ic->rto);
1457 }
1458
Willy Tarreau828824a2015-04-19 17:20:03 +02001459 /* on shutw we always wake the applet up */
1460 appctx_wakeup(si_appctx(si));
1461
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001462 switch (si->state) {
1463 case SI_ST_EST:
1464 /* we have to shut before closing, otherwise some short messages
1465 * may never leave the system, especially when there are remaining
1466 * unread data in the socket input buffer, or when nolinger is set.
1467 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1468 * no risk so we close both sides immediately.
1469 */
1470 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1471 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1472 return;
1473
1474 /* fall through */
1475 case SI_ST_CON:
1476 case SI_ST_CER:
1477 case SI_ST_QUE:
1478 case SI_ST_TAR:
1479 /* Note that none of these states may happen with applets */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001480 si_applet_release(si);
Willy Tarreau958f0742015-09-25 20:24:26 +02001481 si->state = SI_ST_DIS;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001482 default:
1483 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
1484 ic->flags &= ~CF_SHUTR_NOW;
1485 ic->flags |= CF_SHUTR;
1486 ic->rex = TICK_ETERNITY;
1487 si->exp = TICK_ETERNITY;
1488 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001489}
1490
1491/* chk_rcv function for applets */
1492static void stream_int_chk_rcv_applet(struct stream_interface *si)
1493{
1494 struct channel *ic = si_ic(si);
1495
1496 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1497 __FUNCTION__,
1498 si, si->state, ic->flags, si_oc(si)->flags);
1499
1500 if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ))))
1501 return;
Willy Tarreau828824a2015-04-19 17:20:03 +02001502 /* here we only wake the applet up if it was waiting for some room */
1503 if (!(si->flags & SI_FL_WAIT_ROOM))
1504 return;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001505
Willy Tarreau828824a2015-04-19 17:20:03 +02001506 if (channel_may_recv(ic) && !ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001507 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001508 appctx_wakeup(si_appctx(si));
Thierry FOURNIER5bc2cbf2015-09-04 18:40:36 +02001509 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001510}
1511
1512/* chk_snd function for applets */
1513static void stream_int_chk_snd_applet(struct stream_interface *si)
1514{
1515 struct channel *oc = si_oc(si);
1516
1517 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1518 __FUNCTION__,
1519 si, si->state, si_ic(si)->flags, oc->flags);
1520
1521 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1522 return;
1523
Willy Tarreau828824a2015-04-19 17:20:03 +02001524 /* we only wake the applet up if it was waiting for some data */
1525
1526 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001527 return;
1528
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001529 if (!tick_isset(oc->wex))
1530 oc->wex = tick_add_ifset(now_ms, oc->wto);
1531
Willy Tarreau828824a2015-04-19 17:20:03 +02001532 if (!channel_is_empty(oc)) {
1533 /* (re)start sending */
1534 appctx_wakeup(si_appctx(si));
1535 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001536}
1537
Willy Tarreaudded32d2008-11-30 19:48:07 +01001538/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001539 * Local variables:
1540 * c-indent-level: 8
1541 * c-basic-offset: 8
1542 * End:
1543 */