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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 Tarreau06d80a92017-10-19 14:32:15 +0200146 co_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,
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200381 (conn->flags & CO_FL_XPRT_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 */
Bin Wang95fad5b2017-09-15 14:56:40 +0800499
500 /* ensure it's only set if a write attempt has succeeded */
501 ic->flags &= ~CF_WRITE_PARTIAL;
502
Willy Tarreau615f28b2015-09-23 18:40:09 +0200503 if (!channel_is_empty(ic) &&
504 (si_opposite(si)->flags & SI_FL_WAIT_DATA) &&
505 (ic->buf->i == 0 || ic->pipe)) {
506 int new_len, last_len;
507
508 last_len = ic->buf->o;
509 if (ic->pipe)
510 last_len += ic->pipe->data;
511
512 si_chk_snd(si_opposite(si));
513
514 new_len = ic->buf->o;
515 if (ic->pipe)
516 new_len += ic->pipe->data;
517
518 /* check if the consumer has freed some space either in the
519 * buffer or in the pipe.
520 */
521 if (channel_may_recv(ic) && new_len < last_len)
522 si->flags &= ~SI_FL_WAIT_ROOM;
523 }
524
525 if (si->flags & SI_FL_WAIT_ROOM) {
526 ic->rex = TICK_ETERNITY;
527 }
528 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL &&
529 channel_may_recv(ic)) {
530 /* we must re-enable reading if si_chk_snd() has freed some space */
531 if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex))
532 ic->rex = tick_add_ifset(now_ms, ic->rto);
533 }
534
535 /* wake the task up only when needed */
536 if (/* changes on the production side */
537 (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
538 si->state != SI_ST_EST ||
539 (si->flags & SI_FL_ERR) ||
540 ((ic->flags & CF_READ_PARTIAL) &&
541 (!ic->to_forward || si_opposite(si)->state != SI_ST_EST)) ||
542
543 /* changes on the consumption side */
544 (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
545 ((oc->flags & CF_WRITE_ACTIVITY) &&
546 ((oc->flags & CF_SHUTW) ||
547 ((oc->flags & CF_WAKE_WRITE) &&
548 (si_opposite(si)->state != SI_ST_EST ||
549 (channel_is_empty(oc) && !oc->to_forward)))))) {
550 task_wakeup(si_task(si), TASK_WOKEN_IO);
551 }
552 if (ic->flags & CF_READ_ACTIVITY)
553 ic->flags &= ~CF_READ_DONTWAIT;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200554}
555
556
Willy Tarreau651e1822015-09-23 20:06:13 +0200557/* Callback to be used by connection I/O handlers upon completion. It propagates
558 * 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 */
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200563static int si_conn_wake_cb(struct connection *conn)
Willy Tarreaufd31e532012-07-23 18:24:25 +0200564{
Willy Tarreaue603e692012-09-27 22:20:41 +0200565 struct stream_interface *si = conn->owner;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100566 struct channel *ic = si_ic(si);
567 struct channel *oc = si_oc(si);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200568
Willy Tarreau651e1822015-09-23 20:06:13 +0200569 /* First step, report to the stream-int what was detected at the
570 * connection layer : errors and connection establishment.
571 */
Willy Tarreau3c55ec22012-07-23 19:19:51 +0200572 if (conn->flags & CO_FL_ERROR)
573 si->flags |= SI_FL_ERR;
574
Willy Tarreau52821e22017-03-18 17:11:37 +0100575 if ((si->state < SI_ST_EST) &&
576 (conn->flags & (CO_FL_CONNECTED | CO_FL_HANDSHAKE)) == CO_FL_CONNECTED) {
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200577 si->exp = TICK_ETERNITY;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100578 oc->flags |= CF_WRITE_NULL;
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200579 }
580
Willy Tarreau651e1822015-09-23 20:06:13 +0200581 /* Second step : update the stream-int and channels, try to forward any
582 * pending data, then possibly wake the stream up based on the new
583 * stream-int status.
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200584 */
Willy Tarreau651e1822015-09-23 20:06:13 +0200585 stream_int_notify(si);
Christopher Fauleta73e59b2016-12-09 17:30:18 +0100586 channel_release_buffer(ic, &(si_strm(si)->buffer_wait));
Willy Tarreauea3cc482015-09-23 19:37:00 +0200587
Willy Tarreau651e1822015-09-23 20:06:13 +0200588 /* Third step : update the connection's polling status based on what
589 * was done above (eg: maybe some buffers got emptied).
590 */
591 if (channel_is_empty(oc))
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200592 __conn_xprt_stop_send(conn);
Willy Tarreauea3cc482015-09-23 19:37:00 +0200593
Willy Tarreaufd31e532012-07-23 18:24:25 +0200594
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200595 if (si->flags & SI_FL_WAIT_ROOM) {
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200596 __conn_xprt_stop_recv(conn);
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200597 }
Willy Tarreauafc8a222014-11-28 15:46:27 +0100598 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL &&
599 channel_may_recv(ic)) {
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200600 __conn_xprt_want_recv(conn);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200601 }
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200602 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200603}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200604
Willy Tarreau5368d802012-08-21 18:22:06 +0200605/*
606 * This function is called to send buffer data to a stream socket.
Godbache68e02d2013-10-11 15:48:29 +0800607 * It calls the transport layer's snd_buf function. It relies on the
Godbach4f489902013-12-04 17:24:06 +0800608 * caller to commit polling changes. The caller should check conn->flags
609 * for errors.
Willy Tarreau5368d802012-08-21 18:22:06 +0200610 */
Godbach4f489902013-12-04 17:24:06 +0800611static void si_conn_send(struct connection *conn)
Willy Tarreau5368d802012-08-21 18:22:06 +0200612{
Willy Tarreaue603e692012-09-27 22:20:41 +0200613 struct stream_interface *si = conn->owner;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100614 struct channel *oc = si_oc(si);
Willy Tarreau5368d802012-08-21 18:22:06 +0200615 int ret;
616
Bin Wang95fad5b2017-09-15 14:56:40 +0800617 /* ensure it's only set if a write attempt has succeeded */
618 oc->flags &= ~CF_WRITE_PARTIAL;
619
Willy Tarreauafc8a222014-11-28 15:46:27 +0100620 if (oc->pipe && conn->xprt->snd_pipe) {
621 ret = conn->xprt->snd_pipe(conn, oc->pipe);
Willy Tarreau96199b12012-08-24 00:46:52 +0200622 if (ret > 0)
Willy Tarreauafc8a222014-11-28 15:46:27 +0100623 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Willy Tarreau5368d802012-08-21 18:22:06 +0200624
Willy Tarreauafc8a222014-11-28 15:46:27 +0100625 if (!oc->pipe->data) {
626 put_pipe(oc->pipe);
627 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200628 }
629
Willy Tarreau96199b12012-08-24 00:46:52 +0200630 if (conn->flags & CO_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +0800631 return;
Willy Tarreau5368d802012-08-21 18:22:06 +0200632 }
633
634 /* At this point, the pipe is empty, but we may still have data pending
635 * in the normal buffer.
636 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100637 if (!oc->buf->o)
Godbach4f489902013-12-04 17:24:06 +0800638 return;
Willy Tarreau5368d802012-08-21 18:22:06 +0200639
Godbache68e02d2013-10-11 15:48:29 +0800640 /* when we're here, we already know that there is no spliced
Willy Tarreau5368d802012-08-21 18:22:06 +0200641 * data left, and that there are sendable buffered data.
642 */
Willy Tarreaubbae3f02017-08-30 09:59:52 +0200643 if (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_HANDSHAKE)) && !(oc->flags & CF_SHUTW)) {
Willy Tarreau5368d802012-08-21 18:22:06 +0200644 /* check if we want to inform the kernel that we're interested in
645 * sending more data after this call. We want this if :
646 * - we're about to close after this last send and want to merge
647 * the ongoing FIN with the last segment.
648 * - we know we can't send everything at once and must get back
649 * here because of unaligned data
650 * - there is still a finite amount of data to forward
651 * The test is arranged so that the most common case does only 2
652 * tests.
653 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100654 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200655
Willy Tarreauafc8a222014-11-28 15:46:27 +0100656 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
657 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
Willy Tarreau4ac49282017-10-17 16:33:46 +0200658 (oc->flags & CF_EXPECT_MORE))) ||
659 ((oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW)) == (CF_AUTO_CLOSE|CF_SHUTW_NOW)))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100660 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200661
Willy Tarreauafc8a222014-11-28 15:46:27 +0100662 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100663 send_flag |= CO_SFL_STREAMER;
664
Willy Tarreauafc8a222014-11-28 15:46:27 +0100665 ret = conn->xprt->snd_buf(conn, oc->buf, send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800666 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +0100667 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Willy Tarreau5368d802012-08-21 18:22:06 +0200668
Willy Tarreauafc8a222014-11-28 15:46:27 +0100669 if (!oc->buf->o) {
Godbache68e02d2013-10-11 15:48:29 +0800670 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100671 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800672 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200673
Godbache68e02d2013-10-11 15:48:29 +0800674 /* if some data remain in the buffer, it's only because the
675 * system buffers are full, we will try next time.
676 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200677 }
Godbache68e02d2013-10-11 15:48:29 +0800678 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200679}
680
Willy Tarreau25f13102015-09-24 11:32:22 +0200681/* This function is designed to be called from within the stream handler to
682 * update the channels' expiration timers and the stream interface's flags
683 * based on the channels' flags. It needs to be called only once after the
684 * channels' flags have settled down, and before they are cleared, though it
685 * doesn't harm to call it as often as desired (it just slightly hurts
686 * performance). It must not be called from outside of the stream handler,
687 * as what it does will be used to compute the stream task's expiration.
688 */
689void stream_int_update(struct stream_interface *si)
690{
691 struct channel *ic = si_ic(si);
692 struct channel *oc = si_oc(si);
693
694 if (!(ic->flags & CF_SHUTR)) {
695 /* Read not closed, update FD status and timeout for reads */
696 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
697 /* stop reading */
698 if (!(si->flags & SI_FL_WAIT_ROOM)) {
699 if (!(ic->flags & CF_DONT_READ)) /* full */
700 si->flags |= SI_FL_WAIT_ROOM;
701 ic->rex = TICK_ETERNITY;
702 }
703 }
704 else {
705 /* (re)start reading and update timeout. Note: we don't recompute the timeout
706 * everytime we get here, otherwise it would risk never to expire. We only
707 * update it if is was not yet set. The stream socket handler will already
708 * have updated it if there has been a completed I/O.
709 */
710 si->flags &= ~SI_FL_WAIT_ROOM;
711 if (!(ic->flags & (CF_READ_NOEXP|CF_DONT_READ)) && !tick_isset(ic->rex))
712 ic->rex = tick_add_ifset(now_ms, ic->rto);
713 }
714 }
715
716 if (!(oc->flags & CF_SHUTW)) {
717 /* Write not closed, update FD status and timeout for writes */
718 if (channel_is_empty(oc)) {
719 /* stop writing */
720 if (!(si->flags & SI_FL_WAIT_DATA)) {
721 if ((oc->flags & CF_SHUTW_NOW) == 0)
722 si->flags |= SI_FL_WAIT_DATA;
723 oc->wex = TICK_ETERNITY;
724 }
725 }
726 else {
727 /* (re)start writing and update timeout. Note: we don't recompute the timeout
728 * everytime we get here, otherwise it would risk never to expire. We only
729 * update it if is was not yet set. The stream socket handler will already
730 * have updated it if there has been a completed I/O.
731 */
732 si->flags &= ~SI_FL_WAIT_DATA;
733 if (!tick_isset(oc->wex)) {
734 oc->wex = tick_add_ifset(now_ms, oc->wto);
735 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
736 /* Note: depending on the protocol, we don't know if we're waiting
737 * for incoming data or not. So in order to prevent the socket from
738 * expiring read timeouts during writes, we refresh the read timeout,
739 * except if it was already infinite or if we have explicitly setup
740 * independent streams.
741 */
742 ic->rex = tick_add_ifset(now_ms, ic->rto);
743 }
744 }
745 }
746 }
747}
748
Willy Tarreau452c7d52015-09-25 10:39:16 +0200749/* Updates the polling status of a connection outside of the connection handler
750 * based on the channel's flags and the stream interface's flags. It needs to be
751 * called once after the channels' flags have settled down and the stream has
752 * been updated. It is not designed to be called from within the connection
753 * handler itself.
Willy Tarreau100c4672012-08-20 12:06:26 +0200754 */
755void stream_int_update_conn(struct stream_interface *si)
756{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100757 struct channel *ic = si_ic(si);
758 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200759 struct connection *conn = __objt_conn(si->end);
Willy Tarreau100c4672012-08-20 12:06:26 +0200760
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200761 if (!(ic->flags & CF_SHUTR)) {
762 /* Read not closed */
763 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic))
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200764 __conn_xprt_stop_recv(conn);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200765 else
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200766 __conn_xprt_want_recv(conn);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200767 }
768
769 if (!(oc->flags & CF_SHUTW)) {
770 /* Write not closed */
771 if (channel_is_empty(oc))
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200772 __conn_xprt_stop_send(conn);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200773 else
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200774 __conn_xprt_want_send(conn);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200775 }
776
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200777 conn_cond_update_xprt_polling(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200778}
779
780/*
781 * This function performs a shutdown-read on a stream interface attached to
782 * a connection in a connected or init state (it does nothing for other
783 * states). It either shuts the read side or marks itself as closed. The buffer
784 * flags are updated to reflect the new state. If the stream interface has
785 * SI_FL_NOHALF, we also forward the close to the write side. If a control
786 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +0200787 * descriptors are then shutdown or closed accordingly. The function
788 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200789 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200790static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200791{
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200792 struct connection *conn = __objt_conn(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100793 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200794
Willy Tarreauafc8a222014-11-28 15:46:27 +0100795 ic->flags &= ~CF_SHUTR_NOW;
796 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200797 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100798 ic->flags |= CF_SHUTR;
799 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200800 si->flags &= ~SI_FL_WAIT_ROOM;
801
802 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200803 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200804
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100805 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau6fe15412013-09-29 15:16:03 +0200806 conn_full_close(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200807 si->state = SI_ST_DIS;
808 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200809 }
810 else if (si->flags & SI_FL_NOHALF) {
811 /* we want to immediately forward this close to the write side */
812 return stream_int_shutw_conn(si);
813 }
814 else if (conn->ctrl) {
815 /* we want the caller to disable polling on this FD */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200816 conn_xprt_stop_recv(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200817 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200818}
819
820/*
821 * This function performs a shutdown-write on a stream interface attached to
822 * a connection in a connected or init state (it does nothing for other
823 * states). It either shuts the write side or marks itself as closed. The
824 * buffer flags are updated to reflect the new state. It does also close
825 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +0100826 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200827 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200828static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200829{
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200830 struct connection *conn = __objt_conn(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100831 struct channel *ic = si_ic(si);
832 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200833
Willy Tarreauafc8a222014-11-28 15:46:27 +0100834 oc->flags &= ~CF_SHUTW_NOW;
835 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200836 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100837 oc->flags |= CF_SHUTW;
838 oc->wex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200839 si->flags &= ~SI_FL_WAIT_DATA;
840
Hongbo Longe39683c2017-03-10 18:41:51 +0100841 if (tick_isset(si->hcto)) {
842 ic->rto = si->hcto;
843 ic->rex = tick_add(now_ms, ic->rto);
844 }
845
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200846 switch (si->state) {
847 case SI_ST_EST:
848 /* we have to shut before closing, otherwise some short messages
849 * may never leave the system, especially when there are remaining
850 * unread data in the socket input buffer, or when nolinger is set.
851 * However, if SI_FL_NOLINGER is explicitly set, we know there is
852 * no risk so we close both sides immediately.
853 */
854 if (si->flags & SI_FL_ERR) {
855 /* quick close, the socket is alredy shut anyway */
856 }
857 else if (si->flags & SI_FL_NOLINGER) {
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200858 /* unclean data-layer shutdown */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200859 conn_xprt_shutw_hard(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200860 }
861 else {
862 /* clean data-layer shutdown */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200863 conn_xprt_shutw(conn);
Willy Tarreauf9ce57e2017-10-05 17:24:42 +0200864 conn_sock_shutw(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200865
866 /* If the stream interface is configured to disable half-open
867 * connections, we'll skip the shutdown(), but only if the
868 * read size is already closed. Otherwise we can't support
869 * closed write with pending read (eg: abortonclose while
870 * waiting for the server).
871 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100872 if (!(si->flags & SI_FL_NOHALF) || !(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
Willy Tarreauafc8a222014-11-28 15:46:27 +0100873 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200874 /* OK just a shutw, but we want the caller
875 * to disable polling on this FD if exists.
876 */
Willy Tarreau1398aa12015-03-12 23:04:07 +0100877 conn_cond_update_polling(conn);
Willy Tarreau6fe15412013-09-29 15:16:03 +0200878 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200879 }
880 }
881 }
882
883 /* fall through */
884 case SI_ST_CON:
885 /* we may have to close a pending connection, and mark the
886 * response buffer as shutr
887 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200888 conn_full_close(conn);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200889 /* fall through */
890 case SI_ST_CER:
891 case SI_ST_QUE:
892 case SI_ST_TAR:
893 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +0200894 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200895 default:
896 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100897 ic->flags &= ~CF_SHUTR_NOW;
898 ic->flags |= CF_SHUTR;
899 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200900 si->exp = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +0200901 }
902}
903
Willy Tarreau46a8d922012-08-20 12:38:36 +0200904/* This function is used for inter-stream-interface calls. It is called by the
905 * consumer to inform the producer side that it may be interested in checking
906 * for free space in the buffer. Note that it intentionally does not update
907 * timeouts, so that we can still check them later at wake-up. This function is
908 * dedicated to connection-based stream interfaces.
909 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200910static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +0200911{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100912 struct channel *ic = si_ic(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200913 struct connection *conn = __objt_conn(si->end);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200914
Willy Tarreauafc8a222014-11-28 15:46:27 +0100915 if (unlikely(si->state > SI_ST_EST || (ic->flags & CF_SHUTR)))
Willy Tarreau46a8d922012-08-20 12:38:36 +0200916 return;
917
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200918 conn_refresh_polling_flags(conn);
Willy Tarreau7d281492012-12-16 19:19:13 +0100919
Willy Tarreauafc8a222014-11-28 15:46:27 +0100920 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
Willy Tarreau46a8d922012-08-20 12:38:36 +0200921 /* stop reading */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100922 if (!(ic->flags & CF_DONT_READ)) /* full */
Willy Tarreau46a8d922012-08-20 12:38:36 +0200923 si->flags |= SI_FL_WAIT_ROOM;
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200924 __conn_xprt_stop_recv(conn);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200925 }
926 else {
927 /* (re)start reading */
928 si->flags &= ~SI_FL_WAIT_ROOM;
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200929 __conn_xprt_want_recv(conn);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200930 }
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200931 conn_cond_update_xprt_polling(conn);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200932}
933
934
Willy Tarreaude5722c2012-08-20 15:01:10 +0200935/* This function is used for inter-stream-interface calls. It is called by the
936 * producer to inform the consumer side that it may be interested in checking
937 * for data in the buffer. Note that it intentionally does not update timeouts,
938 * so that we can still check them later at wake-up.
939 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200940static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +0200941{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100942 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200943 struct connection *conn = __objt_conn(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +0200944
Bin Wang95fad5b2017-09-15 14:56:40 +0800945 /* ensure it's only set if a write attempt has succeeded */
946 oc->flags &= ~CF_WRITE_PARTIAL;
947
Willy Tarreauafc8a222014-11-28 15:46:27 +0100948 if (unlikely(si->state > SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +0200949 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +0200950
Willy Tarreauafc8a222014-11-28 15:46:27 +0100951 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +0200952 return;
953
Willy Tarreauafc8a222014-11-28 15:46:27 +0100954 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +0100955 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +0200956 return;
957
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200958 if (conn->flags & CO_FL_XPRT_WR_ENA) {
Willy Tarreau5007d2a2013-07-18 22:09:48 +0200959 /* already subscribed to write notifications, will be called
960 * anyway, so let's avoid calling it especially if the reader
961 * is not ready.
962 */
963 return;
964 }
965
Willy Tarreau708e7172014-01-21 10:27:49 +0100966 /* Before calling the data-level operations, we have to prepare
967 * the polling flags to ensure we properly detect changes.
968 */
969 conn_refresh_polling_flags(conn);
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200970 __conn_xprt_want_send(conn);
Willy Tarreaud29a0662012-12-10 16:33:38 +0100971
Willy Tarreau708e7172014-01-21 10:27:49 +0100972 if (!(conn->flags & (CO_FL_HANDSHAKE|CO_FL_WAIT_L4_CONN|CO_FL_WAIT_L6_CONN))) {
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200973 si_conn_send(conn);
Willy Tarreau798c3c92014-01-21 10:30:08 +0100974 if (conn->flags & CO_FL_ERROR) {
Willy Tarreaud29a0662012-12-10 16:33:38 +0100975 /* Write error on the file descriptor */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200976 __conn_xprt_stop_both(conn);
Willy Tarreaud29a0662012-12-10 16:33:38 +0100977 si->flags |= SI_FL_ERR;
Willy Tarreaud29a0662012-12-10 16:33:38 +0100978 goto out_wakeup;
979 }
Willy Tarreaude5722c2012-08-20 15:01:10 +0200980 }
981
982 /* OK, so now we know that some data might have been sent, and that we may
983 * have to poll first. We have to do that too if the buffer is not empty.
984 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100985 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +0200986 /* the connection is established but we can't write. Either the
987 * buffer is empty, or we just refrain from sending because the
988 * ->o limit was reached. Maybe we just wrote the last
989 * chunk and need to close.
990 */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200991 __conn_xprt_stop_send(conn);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100992 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200993 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreaude5722c2012-08-20 15:01:10 +0200994 (si->state == SI_ST_EST)) {
995 si_shutw(si);
996 goto out_wakeup;
997 }
998
Willy Tarreauafc8a222014-11-28 15:46:27 +0100999 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001000 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001001 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001002 }
1003 else {
1004 /* Otherwise there are remaining data to be sent in the buffer,
1005 * which means we have to poll before doing so.
1006 */
Olivier Houchard1a0545f2017-09-13 18:30:23 +02001007 __conn_xprt_want_send(conn);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001008 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001009 if (!tick_isset(oc->wex))
1010 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001011 }
1012
Willy Tarreauafc8a222014-11-28 15:46:27 +01001013 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1014 struct channel *ic = si_ic(si);
1015
Willy Tarreaude5722c2012-08-20 15:01:10 +02001016 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001017 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1018 !channel_is_empty(oc))
1019 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001020
Willy Tarreauafc8a222014-11-28 15:46:27 +01001021 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001022 /* Note: to prevent the client from expiring read timeouts
1023 * during writes, we refresh it. We only do this if the
1024 * interface is not configured for "independent streams",
1025 * because for some applications it's better not to do this,
1026 * for instance when continuously exchanging small amounts
1027 * of data which can full the socket buffers long before a
1028 * write timeout is detected.
1029 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001030 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001031 }
1032 }
1033
1034 /* in case of special condition (error, shutdown, end of write...), we
1035 * have to notify the task.
1036 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001037 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1038 ((oc->flags & CF_WAKE_WRITE) &&
1039 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreaue6300be2014-01-25 02:33:21 +01001040 si->state != SI_ST_EST)))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001041 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001042 if (!(si->flags & SI_FL_DONT_WAKE))
1043 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001044 }
Willy Tarreauf16723e2012-08-24 12:52:22 +02001045
1046 /* commit possible polling changes */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001047 conn_cond_update_polling(conn);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001048}
1049
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001050/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001051 * This is the callback which is called by the connection layer to receive data
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001052 * into the buffer from the connection. It iterates over the transport layer's
1053 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001054 */
Willy Tarreau4aa36832012-10-02 20:07:22 +02001055static void si_conn_recv_cb(struct connection *conn)
Willy Tarreauce323de2012-08-20 21:41:06 +02001056{
Willy Tarreaue603e692012-09-27 22:20:41 +02001057 struct stream_interface *si = conn->owner;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001058 struct channel *ic = si_ic(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001059 int ret, max, cur_read;
1060 int read_poll = MAX_READ_POLL_LOOPS;
1061
1062 /* stop immediately on errors. Note that we DON'T want to stop on
1063 * POLL_ERR, as the poller might report a write error while there
1064 * are still data available in the recv buffer. This typically
1065 * happens when we send too large a request to a backend server
1066 * which rejects it before reading it all.
1067 */
1068 if (conn->flags & CO_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001069 return;
Willy Tarreauce323de2012-08-20 21:41:06 +02001070
Willy Tarreauce323de2012-08-20 21:41:06 +02001071 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001072 if (ic->flags & CF_SHUTR)
Willy Tarreauce323de2012-08-20 21:41:06 +02001073 return;
1074
Willy Tarreau54e917c2017-08-30 07:35:35 +02001075 /* stop here if we reached the end of data */
Olivier Houchard1a0545f2017-09-13 18:30:23 +02001076 if (conn_xprt_read0_pending(conn))
Willy Tarreau54e917c2017-08-30 07:35:35 +02001077 goto out_shutdown_r;
1078
Willy Tarreau96199b12012-08-24 00:46:52 +02001079 cur_read = 0;
Willy Tarreau96199b12012-08-24 00:46:52 +02001080
Willy Tarreauafc8a222014-11-28 15:46:27 +01001081 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !ic->buf->o &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001082 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001083 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001084 /* The buffer was empty and nothing was transferred for more
1085 * than one second. This was caused by a pause and not by
1086 * congestion. Reset any streaming mode to reduce latency.
1087 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001088 ic->xfer_small = 0;
1089 ic->xfer_large = 0;
1090 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001091 }
1092
Willy Tarreau96199b12012-08-24 00:46:52 +02001093 /* First, let's see if we may splice data across the channel without
1094 * using a buffer.
1095 */
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001096 if (conn->xprt->rcv_pipe &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001097 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1098 ic->flags & CF_KERN_SPLICING) {
1099 if (buffer_not_empty(ic->buf)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001100 /* We're embarrassed, there are already data pending in
1101 * the buffer and we don't want to have them at two
1102 * locations at a time. Let's indicate we need some
1103 * place and ask the consumer to hurry.
1104 */
1105 goto abort_splice;
1106 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001107
Willy Tarreauafc8a222014-11-28 15:46:27 +01001108 if (unlikely(ic->pipe == NULL)) {
1109 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1110 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001111 goto abort_splice;
1112 }
1113 }
1114
Willy Tarreauafc8a222014-11-28 15:46:27 +01001115 ret = conn->xprt->rcv_pipe(conn, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001116 if (ret < 0) {
1117 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001118 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001119 goto abort_splice;
1120 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001121
Willy Tarreau96199b12012-08-24 00:46:52 +02001122 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001123 if (ic->to_forward != CHN_INFINITE_FORWARD)
1124 ic->to_forward -= ret;
1125 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001126 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001127 ic->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +02001128 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001129
Olivier Houchard1a0545f2017-09-13 18:30:23 +02001130 if (conn_xprt_read0_pending(conn))
Willy Tarreau96199b12012-08-24 00:46:52 +02001131 goto out_shutdown_r;
1132
1133 if (conn->flags & CO_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001134 return;
Willy Tarreau96199b12012-08-24 00:46:52 +02001135
Willy Tarreau61d39a02013-07-18 21:49:32 +02001136 if (conn->flags & CO_FL_WAIT_ROOM) {
1137 /* the pipe is full or we have read enough data that it
1138 * could soon be full. Let's stop before needing to poll.
1139 */
Willy Tarreau56a77e52012-09-02 18:34:44 +02001140 si->flags |= SI_FL_WAIT_ROOM;
Olivier Houchard1a0545f2017-09-13 18:30:23 +02001141 __conn_xprt_stop_recv(conn);
Willy Tarreau61d39a02013-07-18 21:49:32 +02001142 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001143
Willy Tarreauce323de2012-08-20 21:41:06 +02001144 /* splice not possible (anymore), let's go on on standard copy */
1145 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001146
1147 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001148 if (ic->pipe && unlikely(!ic->pipe->data)) {
1149 put_pipe(ic->pipe);
1150 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001151 }
1152
Christopher Fauleta73e59b2016-12-09 17:30:18 +01001153 /* now we'll need a input buffer for the stream */
1154 if (!channel_alloc_buffer(ic, &(si_strm(si)->buffer_wait))) {
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001155 si->flags |= SI_FL_WAIT_ROOM;
1156 goto end_recv;
1157 }
1158
Willy Tarreau61d39a02013-07-18 21:49:32 +02001159 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1160 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1161 * that if such an event is not handled above in splice, it will be handled here by
1162 * recv().
1163 */
Willy Tarreau54e917c2017-08-30 07:35:35 +02001164 while (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE)) && !(ic->flags & CF_SHUTR)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001165 max = channel_recv_max(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001166
1167 if (!max) {
Willy Tarreau56a77e52012-09-02 18:34:44 +02001168 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreauce323de2012-08-20 21:41:06 +02001169 break;
1170 }
1171
Willy Tarreauafc8a222014-11-28 15:46:27 +01001172 ret = conn->xprt->rcv_buf(conn, ic->buf, max);
Willy Tarreauce323de2012-08-20 21:41:06 +02001173 if (ret <= 0)
1174 break;
1175
1176 cur_read += ret;
1177
1178 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001179 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001180 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001181 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1182 if (fwd > ic->to_forward)
1183 fwd = ic->to_forward;
1184 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001185 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001186 b_adv(ic->buf, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001187 }
1188
Willy Tarreauafc8a222014-11-28 15:46:27 +01001189 ic->flags |= CF_READ_PARTIAL;
1190 ic->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001191
Willy Tarreauafc8a222014-11-28 15:46:27 +01001192 if (!channel_may_recv(ic)) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001193 si->flags |= SI_FL_WAIT_ROOM;
1194 break;
1195 }
1196
Willy Tarreauafc8a222014-11-28 15:46:27 +01001197 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
Olivier Houchard1a0545f2017-09-13 18:30:23 +02001198 if (__conn_xprt_done_recv(conn))
Willy Tarreau796c5b72016-11-29 21:47:02 +01001199 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreauce323de2012-08-20 21:41:06 +02001200 break;
Willy Tarreau5fddab02012-11-09 18:27:26 +01001201 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001202
1203 /* if too many bytes were missing from last read, it means that
1204 * it's pointless trying to read again because the system does
1205 * not have them in buffers.
1206 */
1207 if (ret < max) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001208 /* if a streamer has read few data, it may be because we
1209 * have exhausted system buffers. It's not worth trying
1210 * again.
1211 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001212 if (ic->flags & CF_STREAMER)
Willy Tarreauce323de2012-08-20 21:41:06 +02001213 break;
1214
1215 /* if we read a large block smaller than what we requested,
1216 * it's almost certain we'll never get anything more.
1217 */
1218 if (ret >= global.tune.recv_enough)
1219 break;
1220 }
1221 } /* while !flags */
1222
Willy Tarreauc5890e62014-02-09 17:47:01 +01001223 if (cur_read) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001224 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
1225 (cur_read <= ic->buf->size / 2)) {
1226 ic->xfer_large = 0;
1227 ic->xfer_small++;
1228 if (ic->xfer_small >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001229 /* we have read less than half of the buffer in
1230 * one pass, and this happened at least 3 times.
1231 * This is definitely not a streamer.
1232 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001233 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001234 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001235 else if (ic->xfer_small >= 2) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001236 /* if the buffer has been at least half full twice,
1237 * we receive faster than we send, so at least it
1238 * is not a "fast streamer".
1239 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001240 ic->flags &= ~CF_STREAMER_FAST;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001241 }
1242 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001243 else if (!(ic->flags & CF_STREAMER_FAST) &&
1244 (cur_read >= ic->buf->size - global.tune.maxrewrite)) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001245 /* we read a full buffer at once */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001246 ic->xfer_small = 0;
1247 ic->xfer_large++;
1248 if (ic->xfer_large >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001249 /* we call this buffer a fast streamer if it manages
1250 * to be filled in one call 3 consecutive times.
1251 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001252 ic->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001253 }
1254 }
1255 else {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001256 ic->xfer_small = 0;
1257 ic->xfer_large = 0;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001258 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001259 ic->last_read = now_ms;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001260 }
1261
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001262 end_recv:
1263 if (conn->flags & CO_FL_ERROR)
1264 return;
1265
Olivier Houchard1a0545f2017-09-13 18:30:23 +02001266 if (conn_xprt_read0_pending(conn))
Willy Tarreauce323de2012-08-20 21:41:06 +02001267 /* connection closed */
1268 goto out_shutdown_r;
1269
1270 return;
1271
1272 out_shutdown_r:
1273 /* we received a shutdown */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001274 ic->flags |= CF_READ_NULL;
1275 if (ic->flags & CF_AUTO_CLOSE)
1276 channel_shutw_now(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001277 stream_sock_read0(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001278 return;
Willy Tarreauce323de2012-08-20 21:41:06 +02001279}
1280
1281/*
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001282 * This is the callback which is called by the connection layer to send data
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001283 * from the buffer to the connection. It iterates over the transport layer's
1284 * snd_buf function.
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001285 */
Willy Tarreau4aa36832012-10-02 20:07:22 +02001286static void si_conn_send_cb(struct connection *conn)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001287{
Willy Tarreaue603e692012-09-27 22:20:41 +02001288 struct stream_interface *si = conn->owner;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001289
1290 if (conn->flags & CO_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001291 return;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001292
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001293 if (conn->flags & CO_FL_HANDSHAKE)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001294 /* a handshake was requested */
1295 return;
1296
1297 /* we might have been called just after an asynchronous shutw */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001298 if (si_oc(si)->flags & CF_SHUTW)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001299 return;
1300
1301 /* OK there are data waiting to be sent */
Godbach4f489902013-12-04 17:24:06 +08001302 si_conn_send(conn);
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001303
1304 /* OK all done */
1305 return;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001306}
1307
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001308/*
1309 * This function propagates a null read received on a socket-based connection.
1310 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001311 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001312 */
1313void stream_sock_read0(struct stream_interface *si)
1314{
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001315 struct connection *conn = __objt_conn(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001316 struct channel *ic = si_ic(si);
1317 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001318
Willy Tarreauafc8a222014-11-28 15:46:27 +01001319 ic->flags &= ~CF_SHUTR_NOW;
1320 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001321 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001322 ic->flags |= CF_SHUTR;
1323 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001324 si->flags &= ~SI_FL_WAIT_ROOM;
1325
1326 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1327 return;
1328
Willy Tarreauafc8a222014-11-28 15:46:27 +01001329 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001330 goto do_close;
1331
1332 if (si->flags & SI_FL_NOHALF) {
1333 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001334 /* force flag on ssl to keep stream in cache */
Olivier Houchard1a0545f2017-09-13 18:30:23 +02001335 conn_xprt_shutw_hard(conn);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001336 goto do_close;
1337 }
1338
1339 /* otherwise that's just a normal read shutdown */
Olivier Houchard1a0545f2017-09-13 18:30:23 +02001340 __conn_xprt_stop_recv(conn);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001341 return;
1342
1343 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001344 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001345 conn_full_close(conn);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001346
Willy Tarreauafc8a222014-11-28 15:46:27 +01001347 ic->flags &= ~CF_SHUTR_NOW;
1348 ic->flags |= CF_SHUTR;
1349 ic->rex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001350
Willy Tarreauafc8a222014-11-28 15:46:27 +01001351 oc->flags &= ~CF_SHUTW_NOW;
1352 oc->flags |= CF_SHUTW;
1353 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001354
1355 si->flags &= ~(SI_FL_WAIT_DATA | SI_FL_WAIT_ROOM);
1356
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001357 si->state = SI_ST_DIS;
1358 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001359 return;
1360}
1361
Willy Tarreau651e1822015-09-23 20:06:13 +02001362/* Callback to be used by applet handlers upon completion. It updates the stream
1363 * (which may or may not take this opportunity to try to forward data), then
Emeric Brun2802b072017-06-30 14:11:56 +02001364 * may re-enable the applet's based on the channels and stream interface's final
Willy Tarreau651e1822015-09-23 20:06:13 +02001365 * states.
1366 */
Willy Tarreauaa977ba2015-09-25 11:45:06 +02001367void si_applet_wake_cb(struct stream_interface *si)
Willy Tarreaue5f86492015-04-19 15:16:35 +02001368{
Willy Tarreaueca572f2015-09-25 19:11:55 +02001369 struct channel *ic = si_ic(si);
1370
1371 /* If the applet wants to write and the channel is closed, it's a
1372 * broken pipe and it must be reported.
1373 */
1374 if ((si->flags & SI_FL_WANT_PUT) && (ic->flags & CF_SHUTR))
1375 si->flags |= SI_FL_ERR;
1376
Willy Tarreau651e1822015-09-23 20:06:13 +02001377 /* update the stream-int, channels, and possibly wake the stream up */
1378 stream_int_notify(si);
Willy Tarreaue5f86492015-04-19 15:16:35 +02001379
Emeric Brun2802b072017-06-30 14:11:56 +02001380 /* stream_int_notify may pass throught checksnd and released some
1381 * WAIT_ROOM flags. The process_stream will consider those flags
1382 * to wakeup the appctx but in the case the task is not in runqueue
1383 * we may have to wakeup the appctx immediately.
1384 */
1385 if (!task_in_rq(si_task(si)))
1386 stream_int_update_applet(si);
1387}
Willy Tarreau452c7d52015-09-25 10:39:16 +02001388
1389/* Updates the activity status of an applet outside of the applet handler based
1390 * on the channel's flags and the stream interface's flags. It needs to be
1391 * called once after the channels' flags have settled down and the stream has
1392 * been updated. It is not designed to be called from within the applet handler
1393 * itself.
Willy Tarreau563cc372015-04-19 18:13:56 +02001394 */
1395void stream_int_update_applet(struct stream_interface *si)
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001396{
Willy Tarreaufe127932015-04-21 19:23:39 +02001397 if (((si->flags & (SI_FL_WANT_PUT|SI_FL_WAIT_ROOM)) == SI_FL_WANT_PUT) ||
1398 ((si->flags & (SI_FL_WANT_GET|SI_FL_WAIT_DATA)) == SI_FL_WANT_GET))
Willy Tarreau563cc372015-04-19 18:13:56 +02001399 appctx_wakeup(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001400}
1401
1402/*
1403 * This function performs a shutdown-read on a stream interface attached to an
1404 * applet in a connected or init state (it does nothing for other states). It
1405 * either shuts the read side or marks itself as closed. The buffer flags are
1406 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1407 * we also forward the close to the write side. The owner task is woken up if
1408 * it exists.
1409 */
1410static void stream_int_shutr_applet(struct stream_interface *si)
1411{
1412 struct channel *ic = si_ic(si);
1413
1414 ic->flags &= ~CF_SHUTR_NOW;
1415 if (ic->flags & CF_SHUTR)
1416 return;
1417 ic->flags |= CF_SHUTR;
1418 ic->rex = TICK_ETERNITY;
1419 si->flags &= ~SI_FL_WAIT_ROOM;
1420
Willy Tarreau828824a2015-04-19 17:20:03 +02001421 /* Note: on shutr, we don't call the applet */
1422
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001423 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1424 return;
1425
1426 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau958f0742015-09-25 20:24:26 +02001427 si_applet_release(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001428 si->state = SI_ST_DIS;
1429 si->exp = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001430 }
1431 else if (si->flags & SI_FL_NOHALF) {
1432 /* we want to immediately forward this close to the write side */
1433 return stream_int_shutw_applet(si);
1434 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001435}
1436
1437/*
1438 * This function performs a shutdown-write on a stream interface attached to an
1439 * applet in a connected or init state (it does nothing for other states). It
1440 * either shuts the write side or marks itself as closed. The buffer flags are
1441 * updated to reflect the new state. It does also close everything if the SI
1442 * was marked as being in error state. The owner task is woken up if it exists.
1443 */
1444static void stream_int_shutw_applet(struct stream_interface *si)
1445{
1446 struct channel *ic = si_ic(si);
1447 struct channel *oc = si_oc(si);
1448
1449 oc->flags &= ~CF_SHUTW_NOW;
1450 if (oc->flags & CF_SHUTW)
1451 return;
1452 oc->flags |= CF_SHUTW;
1453 oc->wex = TICK_ETERNITY;
1454 si->flags &= ~SI_FL_WAIT_DATA;
1455
Hongbo Longe39683c2017-03-10 18:41:51 +01001456 if (tick_isset(si->hcto)) {
1457 ic->rto = si->hcto;
1458 ic->rex = tick_add(now_ms, ic->rto);
1459 }
1460
Willy Tarreau828824a2015-04-19 17:20:03 +02001461 /* on shutw we always wake the applet up */
1462 appctx_wakeup(si_appctx(si));
1463
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001464 switch (si->state) {
1465 case SI_ST_EST:
1466 /* we have to shut before closing, otherwise some short messages
1467 * may never leave the system, especially when there are remaining
1468 * unread data in the socket input buffer, or when nolinger is set.
1469 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1470 * no risk so we close both sides immediately.
1471 */
1472 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1473 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1474 return;
1475
1476 /* fall through */
1477 case SI_ST_CON:
1478 case SI_ST_CER:
1479 case SI_ST_QUE:
1480 case SI_ST_TAR:
1481 /* Note that none of these states may happen with applets */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001482 si_applet_release(si);
Willy Tarreau958f0742015-09-25 20:24:26 +02001483 si->state = SI_ST_DIS;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001484 default:
1485 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
1486 ic->flags &= ~CF_SHUTR_NOW;
1487 ic->flags |= CF_SHUTR;
1488 ic->rex = TICK_ETERNITY;
1489 si->exp = TICK_ETERNITY;
1490 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001491}
1492
1493/* chk_rcv function for applets */
1494static void stream_int_chk_rcv_applet(struct stream_interface *si)
1495{
1496 struct channel *ic = si_ic(si);
1497
1498 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1499 __FUNCTION__,
1500 si, si->state, ic->flags, si_oc(si)->flags);
1501
1502 if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ))))
1503 return;
Willy Tarreau828824a2015-04-19 17:20:03 +02001504 /* here we only wake the applet up if it was waiting for some room */
1505 if (!(si->flags & SI_FL_WAIT_ROOM))
1506 return;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001507
Willy Tarreau828824a2015-04-19 17:20:03 +02001508 if (channel_may_recv(ic) && !ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001509 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001510 appctx_wakeup(si_appctx(si));
Thierry FOURNIER5bc2cbf2015-09-04 18:40:36 +02001511 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001512}
1513
1514/* chk_snd function for applets */
1515static void stream_int_chk_snd_applet(struct stream_interface *si)
1516{
1517 struct channel *oc = si_oc(si);
1518
1519 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1520 __FUNCTION__,
1521 si, si->state, si_ic(si)->flags, oc->flags);
1522
1523 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1524 return;
1525
Willy Tarreau828824a2015-04-19 17:20:03 +02001526 /* we only wake the applet up if it was waiting for some data */
1527
1528 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001529 return;
1530
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001531 if (!tick_isset(oc->wex))
1532 oc->wex = tick_add_ifset(now_ms, oc->wto);
1533
Willy Tarreau828824a2015-04-19 17:20:03 +02001534 if (!channel_is_empty(oc)) {
1535 /* (re)start sending */
1536 appctx_wakeup(si_appctx(si));
1537 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001538}
1539
Willy Tarreaudded32d2008-11-30 19:48:07 +01001540/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001541 * Local variables:
1542 * c-indent-level: 8
1543 * c-basic-offset: 8
1544 * End:
1545 */