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Willy Tarreaucff64112008-11-03 06:26:53 +01001/*
2 * Functions managing stream_interface structures
3 *
Willy Tarreauf873d752012-05-11 17:47:17 +02004 * Copyright 2000-2012 Willy Tarreau <w@1wt.eu>
Willy Tarreaucff64112008-11-03 06:26:53 +01005 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13#include <errno.h>
14#include <fcntl.h>
15#include <stdio.h>
16#include <stdlib.h>
17
18#include <sys/socket.h>
19#include <sys/stat.h>
20#include <sys/types.h>
21
Willy Tarreaubf883e02014-11-25 21:10:35 +010022#include <common/buffer.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010023#include <common/compat.h>
24#include <common/config.h>
25#include <common/debug.h>
26#include <common/standard.h>
27#include <common/ticks.h>
28#include <common/time.h>
29
Willy Tarreau8a8d83b2015-04-13 13:24:54 +020030#include <proto/applet.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020031#include <proto/channel.h>
Willy Tarreau8b117082012-08-06 15:06:49 +020032#include <proto/connection.h>
Olivier Houchard9aaf7782017-09-13 18:30:23 +020033#include <proto/mux_pt.h>
Willy Tarreau96199b12012-08-24 00:46:52 +020034#include <proto/pipe.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020035#include <proto/stream.h>
Willy Tarreau269358d2009-09-20 20:14:49 +020036#include <proto/stream_interface.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010037#include <proto/task.h>
38
Willy Tarreaufd31e532012-07-23 18:24:25 +020039#include <types/pipe.h>
40
Willy Tarreauf873d752012-05-11 17:47:17 +020041/* socket functions used when running a stream interface as a task */
Willy Tarreau6fe15412013-09-29 15:16:03 +020042static void stream_int_shutr(struct stream_interface *si);
43static void stream_int_shutw(struct stream_interface *si);
Willy Tarreauf873d752012-05-11 17:47:17 +020044static void stream_int_chk_rcv(struct stream_interface *si);
45static void stream_int_chk_snd(struct stream_interface *si);
Willy Tarreau6fe15412013-09-29 15:16:03 +020046static void stream_int_shutr_conn(struct stream_interface *si);
47static void stream_int_shutw_conn(struct stream_interface *si);
Willy Tarreauc5788912012-08-24 18:12:41 +020048static void stream_int_chk_rcv_conn(struct stream_interface *si);
49static void stream_int_chk_snd_conn(struct stream_interface *si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +020050static void stream_int_shutr_applet(struct stream_interface *si);
51static void stream_int_shutw_applet(struct stream_interface *si);
52static void stream_int_chk_rcv_applet(struct stream_interface *si);
53static void stream_int_chk_snd_applet(struct stream_interface *si);
Olivier Houchard0e367bb2018-09-14 19:41:13 +020054int si_cs_recv(struct conn_stream *cs);
Olivier Houchardc2aa7112018-09-11 18:27:21 +020055static int si_cs_process(struct conn_stream *cs);
Olivier Houchard9aaf7782017-09-13 18:30:23 +020056static int si_idle_conn_wake_cb(struct conn_stream *cs);
Olivier Houchard0e367bb2018-09-14 19:41:13 +020057int si_cs_send(struct conn_stream *cs);
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 = {
Willy Tarreau85f89012018-10-25 11:06:57 +020069 .update = stream_int_update_conn,
Willy Tarreauc5788912012-08-24 18:12:41 +020070 .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 = {
Olivier Houchard21df6cc2018-09-14 23:21:44 +020086 .wake = si_cs_process,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +010087 .name = "STRM",
Willy Tarreauc5788912012-08-24 18:12:41 +020088};
89
Willy Tarreau27375622013-12-17 00:00:28 +010090struct data_cb si_idle_conn_cb = {
Willy Tarreau27375622013-12-17 00:00:28 +010091 .wake = si_idle_conn_wake_cb,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +010092 .name = "IDLE",
Willy Tarreau27375622013-12-17 00:00:28 +010093};
94
Willy Tarreaucff64112008-11-03 06:26:53 +010095/*
96 * This function only has to be called once after a wakeup event in case of
97 * suspected timeout. It controls the stream interface timeouts and sets
98 * si->flags accordingly. It does NOT close anything, as this timeout may
99 * be used for any purpose. It returns 1 if the timeout fired, otherwise
100 * zero.
101 */
102int stream_int_check_timeouts(struct stream_interface *si)
103{
104 if (tick_is_expired(si->exp, now_ms)) {
105 si->flags |= SI_FL_EXP;
106 return 1;
107 }
108 return 0;
109}
110
Willy Tarreaufe3718a2008-11-30 18:14:12 +0100111/* to be called only when in SI_ST_DIS with SI_FL_ERR */
Willy Tarreaucff64112008-11-03 06:26:53 +0100112void stream_int_report_error(struct stream_interface *si)
113{
114 if (!si->err_type)
115 si->err_type = SI_ET_DATA_ERR;
116
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100117 si_oc(si)->flags |= CF_WRITE_ERROR;
118 si_ic(si)->flags |= CF_READ_ERROR;
Willy Tarreaucff64112008-11-03 06:26:53 +0100119}
120
121/*
Willy Tarreaudded32d2008-11-30 19:48:07 +0100122 * Returns a message to the client ; the connection is shut down for read,
123 * and the request is cleared so that no server connection can be initiated.
124 * The buffer is marked for read shutdown on the other side to protect the
125 * message, and the buffer write is enabled. The message is contained in a
Willy Tarreau148d0992010-01-10 10:21:21 +0100126 * "chunk". If it is null, then an empty message is used. The reply buffer does
127 * not need to be empty before this, and its contents will not be overwritten.
128 * The primary goal of this function is to return error messages to a client.
Willy Tarreaudded32d2008-11-30 19:48:07 +0100129 */
Willy Tarreau83061a82018-07-13 11:56:34 +0200130void stream_int_retnclose(struct stream_interface *si,
131 const struct buffer *msg)
Willy Tarreaudded32d2008-11-30 19:48:07 +0100132{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100133 struct channel *ic = si_ic(si);
134 struct channel *oc = si_oc(si);
135
136 channel_auto_read(ic);
137 channel_abort(ic);
138 channel_auto_close(ic);
139 channel_erase(ic);
140 channel_truncate(oc);
Willy Tarreau798e1282010-12-12 13:06:00 +0100141
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200142 if (likely(msg && msg->data))
143 co_inject(oc, msg->area, msg->data);
Willy Tarreaudded32d2008-11-30 19:48:07 +0100144
Willy Tarreauafc8a222014-11-28 15:46:27 +0100145 oc->wex = tick_add_ifset(now_ms, oc->wto);
146 channel_auto_read(oc);
147 channel_auto_close(oc);
148 channel_shutr_now(oc);
Willy Tarreau5d881d02009-12-27 22:51:06 +0100149}
150
Willy Tarreau4a36b562012-08-06 19:31:45 +0200151/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200152 * This function performs a shutdown-read on a detached stream interface in a
153 * connected or init state (it does nothing for other states). It either shuts
154 * the read side or marks itself as closed. The buffer flags are updated to
155 * reflect the new state. If the stream interface has SI_FL_NOHALF, we also
156 * forward the close to the write side. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200157 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200158static void stream_int_shutr(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200159{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100160 struct channel *ic = si_ic(si);
161
162 ic->flags &= ~CF_SHUTR_NOW;
163 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200164 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100165 ic->flags |= CF_SHUTR;
166 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200167 si->flags &= ~SI_FL_WAIT_ROOM;
168
169 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200170 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200171
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100172 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200173 si->state = SI_ST_DIS;
174 si->exp = TICK_ETERNITY;
Willy Tarreaud8ccffe2010-09-07 16:16:50 +0200175 }
Willy Tarreau4a36b562012-08-06 19:31:45 +0200176 else if (si->flags & SI_FL_NOHALF) {
177 /* we want to immediately forward this close to the write side */
178 return stream_int_shutw(si);
179 }
Willy Tarreau0bd05ea2010-07-02 11:18:03 +0200180
Willy Tarreau4a36b562012-08-06 19:31:45 +0200181 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100182 if (!(si->flags & SI_FL_DONT_WAKE))
183 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200184}
185
Willy Tarreau4a36b562012-08-06 19:31:45 +0200186/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200187 * This function performs a shutdown-write on a detached stream interface in a
188 * connected or init state (it does nothing for other states). It either shuts
189 * the write side or marks itself as closed. The buffer flags are updated to
190 * reflect the new state. It does also close everything if the SI was marked as
191 * being in error state. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200192 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200193static void stream_int_shutw(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200194{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100195 struct channel *ic = si_ic(si);
196 struct channel *oc = si_oc(si);
197
198 oc->flags &= ~CF_SHUTW_NOW;
199 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200200 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100201 oc->flags |= CF_SHUTW;
202 oc->wex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200203 si->flags &= ~SI_FL_WAIT_DATA;
204
Hongbo Longe39683c2017-03-10 18:41:51 +0100205 if (tick_isset(si->hcto)) {
206 ic->rto = si->hcto;
207 ic->rex = tick_add(now_ms, ic->rto);
208 }
209
Willy Tarreaufb90d942009-09-05 20:57:35 +0200210 switch (si->state) {
211 case SI_ST_EST:
Willy Tarreau4a36b562012-08-06 19:31:45 +0200212 /* we have to shut before closing, otherwise some short messages
213 * may never leave the system, especially when there are remaining
214 * unread data in the socket input buffer, or when nolinger is set.
215 * However, if SI_FL_NOLINGER is explicitly set, we know there is
216 * no risk so we close both sides immediately.
217 */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200218 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
Willy Tarreauafc8a222014-11-28 15:46:27 +0100219 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200220 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200221
222 /* fall through */
223 case SI_ST_CON:
224 case SI_ST_CER:
Willy Tarreau32d3ee92010-12-29 14:03:02 +0100225 case SI_ST_QUE:
226 case SI_ST_TAR:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200227 /* Note that none of these states may happen with applets */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200228 si->state = SI_ST_DIS;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200229 default:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200230 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100231 ic->flags &= ~CF_SHUTR_NOW;
232 ic->flags |= CF_SHUTR;
233 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200234 si->exp = TICK_ETERNITY;
235 }
236
Willy Tarreau4a36b562012-08-06 19:31:45 +0200237 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100238 if (!(si->flags & SI_FL_DONT_WAKE))
239 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200240}
241
242/* default chk_rcv function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200243static void stream_int_chk_rcv(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200244{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100245 struct channel *ic = si_ic(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200246
Willy Tarreauafc8a222014-11-28 15:46:27 +0100247 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200248 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100249 si, si->state, ic->flags, si_oc(si)->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200250
Willy Tarreauafc8a222014-11-28 15:46:27 +0100251 if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ))))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200252 return;
253
Willy Tarreauafc8a222014-11-28 15:46:27 +0100254 if (!channel_may_recv(ic) || ic->pipe) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200255 /* stop reading */
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +0200256 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200257 }
258 else {
259 /* (re)start reading */
260 si->flags &= ~SI_FL_WAIT_ROOM;
Olivier Houchard53216e72018-10-10 15:46:36 +0200261 tasklet_wakeup(si->wait_event.task);
Willy Tarreau07373b82014-11-28 12:08:47 +0100262 if (!(si->flags & SI_FL_DONT_WAKE))
263 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200264 }
265}
266
267/* default chk_snd function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200268static void stream_int_chk_snd(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200269{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100270 struct channel *oc = si_oc(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200271
Willy Tarreauafc8a222014-11-28 15:46:27 +0100272 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200273 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100274 si, si->state, si_ic(si)->flags, oc->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200275
Willy Tarreauafc8a222014-11-28 15:46:27 +0100276 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200277 return;
278
279 if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100280 channel_is_empty(oc)) /* called with nothing to send ! */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200281 return;
282
283 /* Otherwise there are remaining data to be sent in the buffer,
284 * so we tell the handler.
285 */
286 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100287 if (!tick_isset(oc->wex))
288 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200289
Willy Tarreau07373b82014-11-28 12:08:47 +0100290 if (!(si->flags & SI_FL_DONT_WAKE))
291 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200292}
293
Willy Tarreaua9ff5e62015-07-19 18:46:30 +0200294/* Register an applet to handle a stream_interface as a new appctx. The SI will
295 * wake it up everytime it is solicited. The appctx must be deleted by the task
296 * handler using si_release_endpoint(), possibly from within the function itself.
297 * It also pre-initializes the applet's context and returns it (or NULL in case
298 * it could not be allocated).
Willy Tarreaufb90d942009-09-05 20:57:35 +0200299 */
Willy Tarreau30576452015-04-13 13:50:30 +0200300struct appctx *stream_int_register_handler(struct stream_interface *si, struct applet *app)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200301{
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100302 struct appctx *appctx;
303
Willy Tarreau07373b82014-11-28 12:08:47 +0100304 DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si_task(si));
Willy Tarreaufb90d942009-09-05 20:57:35 +0200305
Willy Tarreaua7513f52015-04-05 00:15:26 +0200306 appctx = si_alloc_appctx(si, app);
Willy Tarreaua69fc9f2014-12-22 19:34:00 +0100307 if (!appctx)
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100308 return NULL;
309
Willy Tarreaufe127932015-04-21 19:23:39 +0200310 si_applet_cant_get(si);
Willy Tarreau828824a2015-04-19 17:20:03 +0200311 appctx_wakeup(appctx);
Willy Tarreau1fbe1c92013-12-01 09:35:41 +0100312 return si_appctx(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200313}
314
Willy Tarreau2c6be842012-07-06 17:12:34 +0200315/* This callback is used to send a valid PROXY protocol line to a socket being
Willy Tarreauafad0e02012-08-09 14:45:22 +0200316 * established. It returns 0 if it fails in a fatal way or needs to poll to go
317 * further, otherwise it returns non-zero and removes itself from the connection's
Willy Tarreaua1a74742012-08-24 12:14:49 +0200318 * flags (the bit is provided in <flag> by the caller). It is designed to be
319 * called by the connection handler and relies on it to commit polling changes.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200320 * Note that it can emit a PROXY line by relying on the other end's address
321 * when the connection is attached to a stream interface, or by resolving the
322 * local address otherwise (also called a LOCAL line).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200323 */
324int conn_si_send_proxy(struct connection *conn, unsigned int flag)
325{
Willy Tarreau2c6be842012-07-06 17:12:34 +0200326 /* we might have been called just after an asynchronous shutw */
Willy Tarreaua1a74742012-08-24 12:14:49 +0200327 if (conn->flags & CO_FL_SOCK_WR_SH)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200328 goto out_error;
329
Willy Tarreaud02cdd22013-12-15 10:23:20 +0100330 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200331 goto out_error;
332
Willy Tarreau2c6be842012-07-06 17:12:34 +0200333 /* If we have a PROXY line to send, we'll use this to validate the
334 * connection, in which case the connection is validated only once
335 * we've sent the whole proxy line. Otherwise we use connect().
336 */
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200337 while (conn->send_proxy_ofs) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200338 struct conn_stream *cs;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200339 int ret;
340
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200341 cs = conn->mux_ctx;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200342 /* 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 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200351 if (conn->mux == &mux_pt_ops && cs->data_cb == &si_conn_cb) {
352 struct stream_interface *si = cs->data;
353 struct conn_stream *remote_cs = objt_cs(si_opposite(si)->end);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200354 ret = make_proxy_line(trash.area, trash.size,
355 objt_server(conn->target),
356 remote_cs ? remote_cs->conn : NULL);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200357 }
358 else {
359 /* The target server expects a LOCAL line to be sent first. Retrieving
360 * local or remote addresses may fail until the connection is established.
361 */
362 conn_get_from_addr(conn);
363 if (!(conn->flags & CO_FL_ADDR_FROM_SET))
364 goto out_wait;
365
366 conn_get_to_addr(conn);
367 if (!(conn->flags & CO_FL_ADDR_TO_SET))
368 goto out_wait;
369
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200370 ret = make_proxy_line(trash.area, trash.size,
371 objt_server(conn->target), conn);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200372 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200373
Willy Tarreau2c6be842012-07-06 17:12:34 +0200374 if (!ret)
375 goto out_error;
376
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200377 if (conn->send_proxy_ofs > 0)
378 conn->send_proxy_ofs = -ret; /* first call */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200379
Willy Tarreaua1a74742012-08-24 12:14:49 +0200380 /* we have to send trash from (ret+sp for -sp bytes). If the
381 * data layer has a pending write, we'll also set MSG_MORE.
382 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200383 ret = conn_sock_send(conn,
384 trash.area + ret + conn->send_proxy_ofs,
385 -conn->send_proxy_ofs,
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200386 (conn->flags & CO_FL_XPRT_WR_ENA) ? MSG_MORE : 0);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200387
Willy Tarreau0a03c0f2015-03-13 00:05:28 +0100388 if (ret < 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200389 goto out_error;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200390
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200391 conn->send_proxy_ofs += ret; /* becomes zero once complete */
392 if (conn->send_proxy_ofs != 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200393 goto out_wait;
394
395 /* OK we've sent the whole line, we're connected */
Willy Tarreau7fe45692013-12-04 23:37:56 +0100396 break;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200397 }
398
Willy Tarreaua1a74742012-08-24 12:14:49 +0200399 /* The connection is ready now, simply return and let the connection
400 * handler notify upper layers if needed.
Willy Tarreau2c6be842012-07-06 17:12:34 +0200401 */
402 if (conn->flags & CO_FL_WAIT_L4_CONN)
403 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200404 conn->flags &= ~flag;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200405 return 1;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200406
407 out_error:
Willy Tarreauafad0e02012-08-09 14:45:22 +0200408 /* Write error on the file descriptor */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200409 conn->flags |= CO_FL_ERROR;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200410 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200411
412 out_wait:
Willy Tarreaua1a74742012-08-24 12:14:49 +0200413 __conn_sock_stop_recv(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200414 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200415}
416
Willy Tarreau27375622013-12-17 00:00:28 +0100417
Willy Tarreau27375622013-12-17 00:00:28 +0100418/* Callback to be used by connection I/O handlers when some activity is detected
419 * on an idle server connection. Its main purpose is to kill the connection once
420 * a close was detected on it. It returns 0 if it did nothing serious, or -1 if
421 * it killed the connection.
422 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200423static int si_idle_conn_wake_cb(struct conn_stream *cs)
Willy Tarreau27375622013-12-17 00:00:28 +0100424{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200425 struct connection *conn = cs->conn;
426 struct stream_interface *si = cs->data;
Willy Tarreau27375622013-12-17 00:00:28 +0100427
428 if (!conn_ctrl_ready(conn))
429 return 0;
430
Olivier Houchardaf4021e2018-08-09 13:06:55 +0200431 conn_sock_drain(conn);
432
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200433 if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH) || cs->flags & CS_FL_ERROR) {
Willy Tarreau27375622013-12-17 00:00:28 +0100434 /* warning, we can't do anything on <conn> after this call ! */
Willy Tarreauc4b56e42015-09-23 17:56:02 +0200435 si_release_endpoint(si);
Willy Tarreau27375622013-12-17 00:00:28 +0100436 return -1;
437 }
438 return 0;
439}
440
Willy Tarreau615f28b2015-09-23 18:40:09 +0200441/* This function is the equivalent to stream_int_update() except that it's
442 * designed to be called from outside the stream handlers, typically the lower
443 * layers (applets, connections) after I/O completion. After updating the stream
444 * interface and timeouts, it will try to forward what can be forwarded, then to
445 * wake the associated task up if an important event requires special handling.
Willy Tarreau0dfccb22018-10-25 13:55:20 +0200446 * It may update SI_FL_WAIT_DATA and/or SI_FL_WAIT_ROOM, that the callers are
447 * encouraged to watch to take appropriate action.
Willy Tarreau615f28b2015-09-23 18:40:09 +0200448 * It should not be called from within the stream itself, stream_int_update()
449 * is designed for this.
450 */
451void stream_int_notify(struct stream_interface *si)
452{
453 struct channel *ic = si_ic(si);
454 struct channel *oc = si_oc(si);
455
456 /* process consumer side */
457 if (channel_is_empty(oc)) {
Olivier Houcharde9bed532017-11-16 17:49:25 +0100458 struct connection *conn = objt_cs(si->end) ? objt_cs(si->end)->conn : NULL;
459
Willy Tarreau615f28b2015-09-23 18:40:09 +0200460 if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) &&
Olivier Houcharde9bed532017-11-16 17:49:25 +0100461 (si->state == SI_ST_EST) && (!conn || !(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS))))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200462 si_shutw(si);
463 oc->wex = TICK_ETERNITY;
464 }
465
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100466 /* indicate that we may be waiting for data from the output channel or
467 * we're about to close and can't expect more data if SHUTW_NOW is there.
468 */
Willy Tarreau615f28b2015-09-23 18:40:09 +0200469 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && channel_may_recv(oc))
470 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100471 else if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)
472 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200473
474 /* update OC timeouts and wake the other side up if it's waiting for room */
475 if (oc->flags & CF_WRITE_ACTIVITY) {
476 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
477 !channel_is_empty(oc))
478 if (tick_isset(oc->wex))
479 oc->wex = tick_add_ifset(now_ms, oc->wto);
480
481 if (!(si->flags & SI_FL_INDEP_STR))
482 if (tick_isset(ic->rex))
483 ic->rex = tick_add_ifset(now_ms, ic->rto);
484
485 if (likely((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL &&
486 channel_may_recv(oc) &&
487 (si_opposite(si)->flags & SI_FL_WAIT_ROOM)))
488 si_chk_rcv(si_opposite(si));
489 }
490
491 /* Notify the other side when we've injected data into the IC that
492 * needs to be forwarded. We can do fast-forwarding as soon as there
493 * are output data, but we avoid doing this if some of the data are
494 * not yet scheduled for being forwarded, because it is very likely
495 * that it will be done again immediately afterwards once the following
496 * data are parsed (eg: HTTP chunking). We only SI_FL_WAIT_ROOM once
497 * we've emptied *some* of the output buffer, and not just when there
498 * is available room, because applets are often forced to stop before
499 * the buffer is full. We must not stop based on input data alone because
500 * an HTTP parser might need more data to complete the parsing.
501 */
502 if (!channel_is_empty(ic) &&
503 (si_opposite(si)->flags & SI_FL_WAIT_DATA) &&
Willy Tarreau77e478c2018-06-19 07:03:14 +0200504 (ci_data(ic) == 0 || ic->pipe)) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200505 int new_len, last_len;
506
Willy Tarreau77e478c2018-06-19 07:03:14 +0200507 last_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200508 if (ic->pipe)
509 last_len += ic->pipe->data;
510
511 si_chk_snd(si_opposite(si));
512
Willy Tarreau77e478c2018-06-19 07:03:14 +0200513 new_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200514 if (ic->pipe)
515 new_len += ic->pipe->data;
516
517 /* check if the consumer has freed some space either in the
518 * buffer or in the pipe.
519 */
Willy Tarreau0dfccb22018-10-25 13:55:20 +0200520 if (channel_may_recv(ic) && new_len < last_len)
Willy Tarreau615f28b2015-09-23 18:40:09 +0200521 si->flags &= ~SI_FL_WAIT_ROOM;
522 }
523
524 if (si->flags & SI_FL_WAIT_ROOM) {
525 ic->rex = TICK_ETERNITY;
526 }
527 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL &&
528 channel_may_recv(ic)) {
529 /* we must re-enable reading if si_chk_snd() has freed some space */
530 if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex))
531 ic->rex = tick_add_ifset(now_ms, ic->rto);
532 }
533
534 /* wake the task up only when needed */
535 if (/* changes on the production side */
536 (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
537 si->state != SI_ST_EST ||
538 (si->flags & SI_FL_ERR) ||
539 ((ic->flags & CF_READ_PARTIAL) &&
540 (!ic->to_forward || si_opposite(si)->state != SI_ST_EST)) ||
541
542 /* changes on the consumption side */
543 (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
Willy Tarreauede3d882018-10-24 17:17:56 +0200544 ((oc->flags & CF_WRITE_ACTIVITY) &&
Willy Tarreau615f28b2015-09-23 18:40:09 +0200545 ((oc->flags & CF_SHUTW) ||
546 ((oc->flags & CF_WAKE_WRITE) &&
547 (si_opposite(si)->state != SI_ST_EST ||
548 (channel_is_empty(oc) && !oc->to_forward)))))) {
549 task_wakeup(si_task(si), TASK_WOKEN_IO);
550 }
551 if (ic->flags & CF_READ_ACTIVITY)
552 ic->flags &= ~CF_READ_DONTWAIT;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200553}
554
555
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200556/* Called by I/O handlers after completion.. It propagates
Willy Tarreau651e1822015-09-23 20:06:13 +0200557 * connection flags to the stream interface, updates the stream (which may or
558 * may not take this opportunity to try to forward data), then update the
559 * connection's polling based on the channels and stream interface's final
560 * states. The function always returns 0.
Willy Tarreau100c4672012-08-20 12:06:26 +0200561 */
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200562static int si_cs_process(struct conn_stream *cs)
Willy Tarreaufd31e532012-07-23 18:24:25 +0200563{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200564 struct connection *conn = cs->conn;
565 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100566 struct channel *ic = si_ic(si);
567 struct channel *oc = si_oc(si);
Olivier Houchard53216e72018-10-10 15:46:36 +0200568 int wait_room = si->flags & SI_FL_WAIT_ROOM;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200569
Olivier Houchardc7ffa912018-08-28 19:37:41 +0200570 /* If we have data to send, try it now */
Willy Tarreau908d26f2018-10-25 14:02:47 +0200571 if (!channel_is_empty(oc) && !(si->wait_event.wait_reason & SUB_CAN_SEND))
572 si_cs_send(cs);
573
Willy Tarreau651e1822015-09-23 20:06:13 +0200574 /* First step, report to the stream-int what was detected at the
575 * connection layer : errors and connection establishment.
576 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200577 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreau3c55ec22012-07-23 19:19:51 +0200578 si->flags |= SI_FL_ERR;
579
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200580 /* If we had early data, and the handshake ended, then
581 * we can remove the flag, and attempt to wake the task up,
582 * in the event there's an analyser waiting for the end of
583 * the handshake.
584 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +0100585 if (!(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS)) &&
586 (cs->flags & CS_FL_WAIT_FOR_HS)) {
587 cs->flags &= ~CS_FL_WAIT_FOR_HS;
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200588 task_wakeup(si_task(si), TASK_WOKEN_MSG);
589 }
590
Willy Tarreau52821e22017-03-18 17:11:37 +0100591 if ((si->state < SI_ST_EST) &&
592 (conn->flags & (CO_FL_CONNECTED | CO_FL_HANDSHAKE)) == CO_FL_CONNECTED) {
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200593 si->exp = TICK_ETERNITY;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100594 oc->flags |= CF_WRITE_NULL;
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200595 }
596
Willy Tarreau651e1822015-09-23 20:06:13 +0200597 /* Second step : update the stream-int and channels, try to forward any
598 * pending data, then possibly wake the stream up based on the new
599 * stream-int status.
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200600 */
Willy Tarreau651e1822015-09-23 20:06:13 +0200601 stream_int_notify(si);
Christopher Fauleta73e59b2016-12-09 17:30:18 +0100602 channel_release_buffer(ic, &(si_strm(si)->buffer_wait));
Willy Tarreauea3cc482015-09-23 19:37:00 +0200603
Willy Tarreau0dfccb22018-10-25 13:55:20 +0200604 /* Try to run again if we free'd some room in the process */
Olivier Houchard53216e72018-10-10 15:46:36 +0200605 if (wait_room && !(si->flags & SI_FL_WAIT_ROOM))
Willy Tarreau0dfccb22018-10-25 13:55:20 +0200606 tasklet_wakeup(si->wait_event.task);
607
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200608 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200609}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200610
Willy Tarreau5368d802012-08-21 18:22:06 +0200611/*
612 * This function is called to send buffer data to a stream socket.
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200613 * It calls the mux layer's snd_buf function. It relies on the
Godbach4f489902013-12-04 17:24:06 +0800614 * caller to commit polling changes. The caller should check conn->flags
615 * for errors.
Willy Tarreau5368d802012-08-21 18:22:06 +0200616 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +0200617int si_cs_send(struct conn_stream *cs)
Willy Tarreau5368d802012-08-21 18:22:06 +0200618{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200619 struct connection *conn = cs->conn;
620 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100621 struct channel *oc = si_oc(si);
Willy Tarreau5368d802012-08-21 18:22:06 +0200622 int ret;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200623 int did_send = 0;
624
625 /* We're already waiting to be able to send, give up */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200626 if (si->wait_event.wait_reason & SUB_CAN_SEND)
Olivier Houchardf6535282018-08-31 17:29:12 +0200627 return 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200628
629 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200630 return 1;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200631
632 if (conn->flags & CO_FL_HANDSHAKE) {
633 /* a handshake was requested */
634 /* Schedule ourself to be woken up once the handshake is done */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200635 conn->xprt->subscribe(conn, SUB_CAN_SEND, &si->wait_event);
Olivier Houchardf6535282018-08-31 17:29:12 +0200636 return 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200637 }
638
639 /* we might have been called just after an asynchronous shutw */
640 if (si_oc(si)->flags & CF_SHUTW)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200641 return 1;
Willy Tarreau5368d802012-08-21 18:22:06 +0200642
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200643 if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) {
644 ret = conn->mux->snd_pipe(cs, oc->pipe);
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200645 if (ret > 0) {
Willy Tarreauede3d882018-10-24 17:17:56 +0200646 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200647 did_send = 1;
648 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200649
Willy Tarreauafc8a222014-11-28 15:46:27 +0100650 if (!oc->pipe->data) {
651 put_pipe(oc->pipe);
652 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200653 }
654
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200655 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardf6535282018-08-31 17:29:12 +0200656 return 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200657 }
658
659 /* At this point, the pipe is empty, but we may still have data pending
660 * in the normal buffer.
661 */
Willy Tarreau77e478c2018-06-19 07:03:14 +0200662 if (!co_data(oc))
Olivier Houchard71384552018-09-12 15:21:03 +0200663 return did_send;
Willy Tarreau5368d802012-08-21 18:22:06 +0200664
Godbache68e02d2013-10-11 15:48:29 +0800665 /* when we're here, we already know that there is no spliced
Willy Tarreau5368d802012-08-21 18:22:06 +0200666 * data left, and that there are sendable buffered data.
667 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200668 if (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_HANDSHAKE)) &&
669 !(cs->flags & CS_FL_ERROR) && !(oc->flags & CF_SHUTW)) {
Willy Tarreau5368d802012-08-21 18:22:06 +0200670 /* check if we want to inform the kernel that we're interested in
671 * sending more data after this call. We want this if :
672 * - we're about to close after this last send and want to merge
673 * the ongoing FIN with the last segment.
674 * - we know we can't send everything at once and must get back
675 * here because of unaligned data
676 * - there is still a finite amount of data to forward
677 * The test is arranged so that the most common case does only 2
678 * tests.
679 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100680 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200681
Willy Tarreauafc8a222014-11-28 15:46:27 +0100682 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
683 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
Willy Tarreau4ac49282017-10-17 16:33:46 +0200684 (oc->flags & CF_EXPECT_MORE))) ||
Willy Tarreauecd2e152017-11-07 15:07:25 +0100685 ((oc->flags & CF_ISRESP) &&
686 ((oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW)) == (CF_AUTO_CLOSE|CF_SHUTW_NOW))))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100687 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200688
Willy Tarreauafc8a222014-11-28 15:46:27 +0100689 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100690 send_flag |= CO_SFL_STREAMER;
691
Olivier Houcharded0f2072018-08-16 15:41:52 +0200692 ret = cs->conn->mux->snd_buf(cs, &oc->buf, co_data(oc), send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800693 if (ret > 0) {
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200694 did_send = 1;
Willy Tarreauede3d882018-10-24 17:17:56 +0200695 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Willy Tarreau5368d802012-08-21 18:22:06 +0200696
Willy Tarreau77e478c2018-06-19 07:03:14 +0200697 co_set_data(oc, co_data(oc) - ret);
Willy Tarreaudeccd112018-06-14 18:38:55 +0200698 c_realign_if_empty(oc);
699
700 if (!co_data(oc)) {
Godbache68e02d2013-10-11 15:48:29 +0800701 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100702 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800703 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200704
Godbache68e02d2013-10-11 15:48:29 +0800705 /* if some data remain in the buffer, it's only because the
706 * system buffers are full, we will try next time.
707 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200708 }
Godbache68e02d2013-10-11 15:48:29 +0800709 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200710 /* We couldn't send all of our data, let the mux know we'd like to send more */
Olivier Houchard53216e72018-10-10 15:46:36 +0200711 if (co_data(oc))
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200712 conn->mux->subscribe(cs, SUB_CAN_SEND, &si->wait_event);
Olivier Houchardf6535282018-08-31 17:29:12 +0200713 return did_send;
Willy Tarreau5368d802012-08-21 18:22:06 +0200714}
715
Olivier Houchard91894cb2018-08-02 18:06:28 +0200716struct task *si_cs_io_cb(struct task *t, void *ctx, unsigned short state)
717{
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200718 struct stream_interface *si = ctx;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200719 struct conn_stream *cs = objt_cs(si->end);
Olivier Houchardf6535282018-08-31 17:29:12 +0200720 int ret = 0;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200721
722 if (!cs)
723 return NULL;
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200724redo:
Olivier Houchard31f04e42018-10-22 16:01:09 +0200725 if (!(si->wait_event.wait_reason & SUB_CAN_SEND) && co_data(si_oc(si)))
Olivier Houchardf6535282018-08-31 17:29:12 +0200726 ret = si_cs_send(cs);
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200727 if (!(si->wait_event.wait_reason & SUB_CAN_RECV))
Olivier Houchardf6535282018-08-31 17:29:12 +0200728 ret |= si_cs_recv(cs);
729 if (ret != 0)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200730 si_cs_process(cs);
Olivier Houchardf6535282018-08-31 17:29:12 +0200731
Olivier Houchard91894cb2018-08-02 18:06:28 +0200732 return (NULL);
733}
734
Willy Tarreau25f13102015-09-24 11:32:22 +0200735/* This function is designed to be called from within the stream handler to
736 * update the channels' expiration timers and the stream interface's flags
737 * based on the channels' flags. It needs to be called only once after the
738 * channels' flags have settled down, and before they are cleared, though it
739 * doesn't harm to call it as often as desired (it just slightly hurts
740 * performance). It must not be called from outside of the stream handler,
741 * as what it does will be used to compute the stream task's expiration.
742 */
743void stream_int_update(struct stream_interface *si)
744{
745 struct channel *ic = si_ic(si);
746 struct channel *oc = si_oc(si);
747
748 if (!(ic->flags & CF_SHUTR)) {
749 /* Read not closed, update FD status and timeout for reads */
750 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
751 /* stop reading */
752 if (!(si->flags & SI_FL_WAIT_ROOM)) {
753 if (!(ic->flags & CF_DONT_READ)) /* full */
754 si->flags |= SI_FL_WAIT_ROOM;
755 ic->rex = TICK_ETERNITY;
756 }
757 }
Willy Tarreau171d5f22018-07-24 16:56:34 +0200758 else if (!(si->flags & SI_FL_WAIT_ROOM) || !co_data(ic)) {
Willy Tarreau25f13102015-09-24 11:32:22 +0200759 /* (re)start reading and update timeout. Note: we don't recompute the timeout
760 * everytime we get here, otherwise it would risk never to expire. We only
761 * update it if is was not yet set. The stream socket handler will already
762 * have updated it if there has been a completed I/O.
763 */
764 si->flags &= ~SI_FL_WAIT_ROOM;
Olivier Houchard53216e72018-10-10 15:46:36 +0200765 tasklet_wakeup(si->wait_event.task);
Willy Tarreau25f13102015-09-24 11:32:22 +0200766 if (!(ic->flags & (CF_READ_NOEXP|CF_DONT_READ)) && !tick_isset(ic->rex))
767 ic->rex = tick_add_ifset(now_ms, ic->rto);
768 }
769 }
770
771 if (!(oc->flags & CF_SHUTW)) {
772 /* Write not closed, update FD status and timeout for writes */
773 if (channel_is_empty(oc)) {
774 /* stop writing */
775 if (!(si->flags & SI_FL_WAIT_DATA)) {
776 if ((oc->flags & CF_SHUTW_NOW) == 0)
777 si->flags |= SI_FL_WAIT_DATA;
778 oc->wex = TICK_ETERNITY;
779 }
780 }
781 else {
782 /* (re)start writing and update timeout. Note: we don't recompute the timeout
783 * everytime we get here, otherwise it would risk never to expire. We only
784 * update it if is was not yet set. The stream socket handler will already
785 * have updated it if there has been a completed I/O.
786 */
787 si->flags &= ~SI_FL_WAIT_DATA;
788 if (!tick_isset(oc->wex)) {
789 oc->wex = tick_add_ifset(now_ms, oc->wto);
790 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
791 /* Note: depending on the protocol, we don't know if we're waiting
792 * for incoming data or not. So in order to prevent the socket from
793 * expiring read timeouts during writes, we refresh the read timeout,
794 * except if it was already infinite or if we have explicitly setup
795 * independent streams.
796 */
797 ic->rex = tick_add_ifset(now_ms, ic->rto);
798 }
799 }
800 }
801 }
802}
803
Willy Tarreau85f89012018-10-25 11:06:57 +0200804/* Updates the active status of a connection outside of the connection handler
805 * based on the channel's flags and the stream interface's flags. It needs to
806 * be called once after the channels' flags have settled down and the stream
807 * has been updated. It is not designed to be called from within the connection
808 * handler itself.
809 */
810void stream_int_update_conn(struct stream_interface *si)
811{
812 struct channel *ic = si_ic(si);
813 struct channel *oc = si_oc(si);
814 struct conn_stream *cs = __objt_cs(si->end);
815
816 if (!(ic->flags & CF_SHUTR)) {
817 /* Read not closed, it doesn't seem we have to do anything here */
818 }
819
Willy Tarreaueafd8eb2018-10-28 13:32:08 +0100820 if (!(oc->flags & CF_SHUTW) && /* Write not closed */
821 !channel_is_empty(oc) &&
822 !(cs->flags & CS_FL_ERROR) &&
823 !(cs->conn->flags & CO_FL_ERROR)) {
824 si_cs_process(cs);
Willy Tarreau85f89012018-10-25 11:06:57 +0200825 }
826}
827
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200828/*
829 * This function performs a shutdown-read on a stream interface attached to
830 * a connection in a connected or init state (it does nothing for other
831 * states). It either shuts the read side or marks itself as closed. The buffer
832 * flags are updated to reflect the new state. If the stream interface has
833 * SI_FL_NOHALF, we also forward the close to the write side. If a control
834 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +0200835 * descriptors are then shutdown or closed accordingly. The function
836 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200837 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200838static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200839{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200840 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100841 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200842
Willy Tarreauafc8a222014-11-28 15:46:27 +0100843 ic->flags &= ~CF_SHUTR_NOW;
844 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200845 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100846 ic->flags |= CF_SHUTR;
847 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200848 si->flags &= ~SI_FL_WAIT_ROOM;
849
850 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200851 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200852
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100853 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaua553ae92017-10-05 18:52:17 +0200854 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200855 si->state = SI_ST_DIS;
856 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200857 }
858 else if (si->flags & SI_FL_NOHALF) {
859 /* we want to immediately forward this close to the write side */
860 return stream_int_shutw_conn(si);
861 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200862}
863
864/*
865 * This function performs a shutdown-write on a stream interface attached to
866 * a connection in a connected or init state (it does nothing for other
867 * states). It either shuts the write side or marks itself as closed. The
868 * buffer flags are updated to reflect the new state. It does also close
869 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +0100870 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200871 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200872static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200873{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200874 struct conn_stream *cs = __objt_cs(si->end);
875 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100876 struct channel *ic = si_ic(si);
877 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200878
Willy Tarreauafc8a222014-11-28 15:46:27 +0100879 oc->flags &= ~CF_SHUTW_NOW;
880 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200881 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100882 oc->flags |= CF_SHUTW;
883 oc->wex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200884 si->flags &= ~SI_FL_WAIT_DATA;
885
Hongbo Longe39683c2017-03-10 18:41:51 +0100886 if (tick_isset(si->hcto)) {
887 ic->rto = si->hcto;
888 ic->rex = tick_add(now_ms, ic->rto);
889 }
890
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200891 switch (si->state) {
892 case SI_ST_EST:
893 /* we have to shut before closing, otherwise some short messages
894 * may never leave the system, especially when there are remaining
895 * unread data in the socket input buffer, or when nolinger is set.
896 * However, if SI_FL_NOLINGER is explicitly set, we know there is
897 * no risk so we close both sides immediately.
898 */
899 if (si->flags & SI_FL_ERR) {
900 /* quick close, the socket is alredy shut anyway */
901 }
902 else if (si->flags & SI_FL_NOLINGER) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200903 /* unclean data-layer shutdown, typically an aborted request
904 * or a forwarded shutdown from a client to a server due to
905 * option abortonclose. No need for the TLS layer to try to
906 * emit a shutdown message.
907 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200908 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200909 }
910 else {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200911 /* clean data-layer shutdown. This only happens on the
912 * frontend side, or on the backend side when forwarding
913 * a client close in TCP mode or in HTTP TUNNEL mode
914 * while option abortonclose is set. We want the TLS
915 * layer to try to signal it to the peer before we close.
916 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200917 cs_shutw(cs, CS_SHW_NORMAL);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200918
Willy Tarreaua553ae92017-10-05 18:52:17 +0200919 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
920 /* OK just a shutw, but we want the caller
921 * to disable polling on this FD if exists.
922 */
923 conn_cond_update_polling(conn);
924 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200925 }
926 }
927
928 /* fall through */
929 case SI_ST_CON:
930 /* we may have to close a pending connection, and mark the
931 * response buffer as shutr
932 */
Willy Tarreaua553ae92017-10-05 18:52:17 +0200933 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200934 /* fall through */
935 case SI_ST_CER:
936 case SI_ST_QUE:
937 case SI_ST_TAR:
938 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +0200939 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200940 default:
941 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100942 ic->flags &= ~CF_SHUTR_NOW;
943 ic->flags |= CF_SHUTR;
944 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200945 si->exp = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +0200946 }
947}
948
Willy Tarreau46a8d922012-08-20 12:38:36 +0200949/* This function is used for inter-stream-interface calls. It is called by the
950 * consumer to inform the producer side that it may be interested in checking
951 * for free space in the buffer. Note that it intentionally does not update
952 * timeouts, so that we can still check them later at wake-up. This function is
953 * dedicated to connection-based stream interfaces.
954 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200955static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +0200956{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100957 struct channel *ic = si_ic(si);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200958
Willy Tarreauafc8a222014-11-28 15:46:27 +0100959 if (unlikely(si->state > SI_ST_EST || (ic->flags & CF_SHUTR)))
Willy Tarreau46a8d922012-08-20 12:38:36 +0200960 return;
961
Willy Tarreauafc8a222014-11-28 15:46:27 +0100962 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
Willy Tarreau46a8d922012-08-20 12:38:36 +0200963 /* stop reading */
Olivier Houchard53216e72018-10-10 15:46:36 +0200964 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreau46a8d922012-08-20 12:38:36 +0200965 }
966 else {
Olivier Houchard53216e72018-10-10 15:46:36 +0200967 struct conn_stream *cs = objt_cs(si->end);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200968 /* (re)start reading */
969 si->flags &= ~SI_FL_WAIT_ROOM;
Olivier Houchard53216e72018-10-10 15:46:36 +0200970 if (cs) {
971 si_cs_recv(cs);
972 tasklet_wakeup(si->wait_event.task);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200973 }
Olivier Houchard53216e72018-10-10 15:46:36 +0200974 }
Willy Tarreau46a8d922012-08-20 12:38:36 +0200975}
976
977
Willy Tarreaude5722c2012-08-20 15:01:10 +0200978/* This function is used for inter-stream-interface calls. It is called by the
979 * producer to inform the consumer side that it may be interested in checking
980 * for data in the buffer. Note that it intentionally does not update timeouts,
981 * so that we can still check them later at wake-up.
982 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200983static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +0200984{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100985 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200986 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +0200987
Willy Tarreauafc8a222014-11-28 15:46:27 +0100988 if (unlikely(si->state > SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +0200989 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +0200990
Willy Tarreauafc8a222014-11-28 15:46:27 +0100991 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +0200992 return;
993
Willy Tarreauafc8a222014-11-28 15:46:27 +0100994 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +0100995 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +0200996 return;
997
Olivier Houchard31f04e42018-10-22 16:01:09 +0200998 if (!(si->wait_event.wait_reason & SUB_CAN_SEND) && co_data(si_oc(si)))
999 si_cs_send(cs);
Willy Tarreau33a09a52018-10-25 13:49:49 +02001000
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001001 if (cs->flags & CS_FL_ERROR || cs->conn->flags & CO_FL_ERROR) {
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001002 /* Write error on the file descriptor */
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001003 si->flags |= SI_FL_ERR;
1004 goto out_wakeup;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001005 }
1006
1007 /* OK, so now we know that some data might have been sent, and that we may
1008 * have to poll first. We have to do that too if the buffer is not empty.
1009 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001010 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001011 /* the connection is established but we can't write. Either the
1012 * buffer is empty, or we just refrain from sending because the
1013 * ->o limit was reached. Maybe we just wrote the last
1014 * chunk and need to close.
1015 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001016 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001017 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreaude5722c2012-08-20 15:01:10 +02001018 (si->state == SI_ST_EST)) {
1019 si_shutw(si);
1020 goto out_wakeup;
1021 }
1022
Willy Tarreauafc8a222014-11-28 15:46:27 +01001023 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001024 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001025 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001026 }
1027 else {
1028 /* Otherwise there are remaining data to be sent in the buffer,
1029 * which means we have to poll before doing so.
1030 */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001031 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001032 if (!tick_isset(oc->wex))
1033 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001034 }
1035
Willy Tarreauafc8a222014-11-28 15:46:27 +01001036 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1037 struct channel *ic = si_ic(si);
1038
Willy Tarreaude5722c2012-08-20 15:01:10 +02001039 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001040 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1041 !channel_is_empty(oc))
1042 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001043
Willy Tarreauafc8a222014-11-28 15:46:27 +01001044 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001045 /* Note: to prevent the client from expiring read timeouts
1046 * during writes, we refresh it. We only do this if the
1047 * interface is not configured for "independent streams",
1048 * because for some applications it's better not to do this,
1049 * for instance when continuously exchanging small amounts
1050 * of data which can full the socket buffers long before a
1051 * write timeout is detected.
1052 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001053 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001054 }
1055 }
1056
1057 /* in case of special condition (error, shutdown, end of write...), we
1058 * have to notify the task.
1059 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001060 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1061 ((oc->flags & CF_WAKE_WRITE) &&
1062 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreaue6300be2014-01-25 02:33:21 +01001063 si->state != SI_ST_EST)))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001064 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001065 if (!(si->flags & SI_FL_DONT_WAKE))
1066 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001067 }
1068}
1069
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001070/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001071 * This is the callback which is called by the connection layer to receive data
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001072 * into the buffer from the connection. It iterates over the mux layer's
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001073 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001074 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +02001075int si_cs_recv(struct conn_stream *cs)
Willy Tarreauce323de2012-08-20 21:41:06 +02001076{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001077 struct connection *conn = cs->conn;
1078 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001079 struct channel *ic = si_ic(si);
Olivier Houchardf6535282018-08-31 17:29:12 +02001080 int ret, max, cur_read = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001081 int read_poll = MAX_READ_POLL_LOOPS;
1082
1083 /* stop immediately on errors. Note that we DON'T want to stop on
1084 * POLL_ERR, as the poller might report a write error while there
1085 * are still data available in the recv buffer. This typically
1086 * happens when we send too large a request to a backend server
1087 * which rejects it before reading it all.
1088 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +02001089 if (!conn_xprt_ready(conn))
1090 return 0;
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001091 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001092 return 1; // We want to make sure si_cs_wake() is called, so that process_strema is woken up, on failure
Olivier Houchardf6535282018-08-31 17:29:12 +02001093
1094 /* If another call to si_cs_recv() failed, and we subscribed to
1095 * recv events already, give up now.
1096 */
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001097 if (si->wait_event.wait_reason & SUB_CAN_RECV)
Olivier Houchardf6535282018-08-31 17:29:12 +02001098 return 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001099
Willy Tarreauce323de2012-08-20 21:41:06 +02001100 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001101 if (ic->flags & CF_SHUTR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001102 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001103
Willy Tarreau54e917c2017-08-30 07:35:35 +02001104 /* stop here if we reached the end of data */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001105 if (cs->flags & CS_FL_EOS)
Willy Tarreau54e917c2017-08-30 07:35:35 +02001106 goto out_shutdown_r;
1107
Willy Tarreau77e478c2018-06-19 07:03:14 +02001108 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !co_data(ic) &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001109 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001110 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001111 /* The buffer was empty and nothing was transferred for more
1112 * than one second. This was caused by a pause and not by
1113 * congestion. Reset any streaming mode to reduce latency.
1114 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001115 ic->xfer_small = 0;
1116 ic->xfer_large = 0;
1117 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001118 }
1119
Willy Tarreau96199b12012-08-24 00:46:52 +02001120 /* First, let's see if we may splice data across the channel without
1121 * using a buffer.
1122 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001123 if (conn->xprt->rcv_pipe && conn->mux->rcv_pipe &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001124 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1125 ic->flags & CF_KERN_SPLICING) {
Willy Tarreaud760eec2018-07-10 09:50:25 +02001126 if (c_data(ic)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001127 /* We're embarrassed, there are already data pending in
1128 * the buffer and we don't want to have them at two
1129 * locations at a time. Let's indicate we need some
1130 * place and ask the consumer to hurry.
1131 */
1132 goto abort_splice;
1133 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001134
Willy Tarreauafc8a222014-11-28 15:46:27 +01001135 if (unlikely(ic->pipe == NULL)) {
1136 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1137 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001138 goto abort_splice;
1139 }
1140 }
1141
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001142 ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001143 if (ret < 0) {
1144 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001145 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001146 goto abort_splice;
1147 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001148
Willy Tarreau96199b12012-08-24 00:46:52 +02001149 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001150 if (ic->to_forward != CHN_INFINITE_FORWARD)
1151 ic->to_forward -= ret;
1152 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001153 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001154 ic->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +02001155 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001156
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001157 if (cs->flags & CS_FL_EOS)
Willy Tarreau96199b12012-08-24 00:46:52 +02001158 goto out_shutdown_r;
1159
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001160 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001161 return 1;
Willy Tarreau96199b12012-08-24 00:46:52 +02001162
Willy Tarreau61d39a02013-07-18 21:49:32 +02001163 if (conn->flags & CO_FL_WAIT_ROOM) {
1164 /* the pipe is full or we have read enough data that it
1165 * could soon be full. Let's stop before needing to poll.
1166 */
Willy Tarreau56a77e52012-09-02 18:34:44 +02001167 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreau61d39a02013-07-18 21:49:32 +02001168 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001169
Willy Tarreauce323de2012-08-20 21:41:06 +02001170 /* splice not possible (anymore), let's go on on standard copy */
1171 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001172
1173 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001174 if (ic->pipe && unlikely(!ic->pipe->data)) {
1175 put_pipe(ic->pipe);
1176 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001177 }
1178
Christopher Fauleta73e59b2016-12-09 17:30:18 +01001179 /* now we'll need a input buffer for the stream */
Willy Tarreau581abd32018-10-25 10:21:41 +02001180 if (!si_alloc_ibuf(si, &(si_strm(si)->buffer_wait)))
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001181 goto end_recv;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001182
Willy Tarreau61d39a02013-07-18 21:49:32 +02001183 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1184 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1185 * that if such an event is not handled above in splice, it will be handled here by
1186 * recv().
1187 */
Christopher Faulet7c42eac2018-04-17 14:33:47 +02001188 while (!(conn->flags & (CO_FL_ERROR | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE)) &&
Willy Tarreaub78b80e2017-12-12 09:58:40 +01001189 !(cs->flags & (CS_FL_ERROR|CS_FL_EOS)) && !(ic->flags & CF_SHUTR)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001190 max = channel_recv_max(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001191
1192 if (!max) {
Willy Tarreau56a77e52012-09-02 18:34:44 +02001193 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreauce323de2012-08-20 21:41:06 +02001194 break;
1195 }
1196
Olivier Houchard511efea2018-08-16 15:30:32 +02001197 ret = cs->conn->mux->rcv_buf(cs, &ic->buf, max, co_data(ic) ? CO_RFL_BUF_WET : 0);
Willy Tarreau6577b482017-12-10 21:19:33 +01001198 if (cs->flags & CS_FL_RCV_MORE)
1199 si->flags |= SI_FL_WAIT_ROOM;
1200
Willy Tarreauce323de2012-08-20 21:41:06 +02001201 if (ret <= 0)
1202 break;
1203
1204 cur_read += ret;
1205
1206 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001207 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001208 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001209 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1210 if (fwd > ic->to_forward)
1211 fwd = ic->to_forward;
1212 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001213 }
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001214 c_adv(ic, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001215 }
1216
Willy Tarreauafc8a222014-11-28 15:46:27 +01001217 ic->flags |= CF_READ_PARTIAL;
1218 ic->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001219
Willy Tarreauafc8a222014-11-28 15:46:27 +01001220 if (!channel_may_recv(ic)) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001221 si->flags |= SI_FL_WAIT_ROOM;
1222 break;
1223 }
1224
Christopher Faulet955188d2018-10-22 21:34:21 +02001225 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0)
Willy Tarreau62dd6982017-11-18 11:26:20 +01001226 break;
Willy Tarreauce323de2012-08-20 21:41:06 +02001227
1228 /* if too many bytes were missing from last read, it means that
1229 * it's pointless trying to read again because the system does
1230 * not have them in buffers.
1231 */
1232 if (ret < max) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001233 /* if a streamer has read few data, it may be because we
1234 * have exhausted system buffers. It's not worth trying
1235 * again.
1236 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001237 if (ic->flags & CF_STREAMER)
Willy Tarreauce323de2012-08-20 21:41:06 +02001238 break;
1239
1240 /* if we read a large block smaller than what we requested,
1241 * it's almost certain we'll never get anything more.
1242 */
1243 if (ret >= global.tune.recv_enough)
1244 break;
1245 }
1246 } /* while !flags */
1247
Willy Tarreauc5890e62014-02-09 17:47:01 +01001248 if (cur_read) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001249 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001250 (cur_read <= ic->buf.size / 2)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001251 ic->xfer_large = 0;
1252 ic->xfer_small++;
1253 if (ic->xfer_small >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001254 /* we have read less than half of the buffer in
1255 * one pass, and this happened at least 3 times.
1256 * This is definitely not a streamer.
1257 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001258 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001259 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001260 else if (ic->xfer_small >= 2) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001261 /* if the buffer has been at least half full twice,
1262 * we receive faster than we send, so at least it
1263 * is not a "fast streamer".
1264 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001265 ic->flags &= ~CF_STREAMER_FAST;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001266 }
1267 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001268 else if (!(ic->flags & CF_STREAMER_FAST) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001269 (cur_read >= ic->buf.size - global.tune.maxrewrite)) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001270 /* we read a full buffer at once */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001271 ic->xfer_small = 0;
1272 ic->xfer_large++;
1273 if (ic->xfer_large >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001274 /* we call this buffer a fast streamer if it manages
1275 * to be filled in one call 3 consecutive times.
1276 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001277 ic->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001278 }
1279 }
1280 else {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001281 ic->xfer_small = 0;
1282 ic->xfer_large = 0;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001283 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001284 ic->last_read = now_ms;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001285 }
1286
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001287 end_recv:
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001288 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001289 return 1;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001290
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001291 if (cs->flags & CS_FL_EOS)
Willy Tarreauce323de2012-08-20 21:41:06 +02001292 /* connection closed */
1293 goto out_shutdown_r;
1294
Olivier Houchardf6535282018-08-31 17:29:12 +02001295 /* Subscribe to receive events */
Olivier Houchard53216e72018-10-10 15:46:36 +02001296 if (!(si->flags & SI_FL_WAIT_ROOM))
1297 conn->mux->subscribe(cs, SUB_CAN_RECV, &si->wait_event);
Olivier Houchardf6535282018-08-31 17:29:12 +02001298
Olivier Houchard53216e72018-10-10 15:46:36 +02001299 return (cur_read != 0 || (si->flags & SI_FL_WAIT_ROOM));
Willy Tarreauce323de2012-08-20 21:41:06 +02001300
1301 out_shutdown_r:
1302 /* we received a shutdown */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001303 ic->flags |= CF_READ_NULL;
1304 if (ic->flags & CF_AUTO_CLOSE)
1305 channel_shutw_now(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001306 stream_sock_read0(si);
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001307 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001308}
1309
1310/*
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001311 * This function propagates a null read received on a socket-based connection.
1312 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001313 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001314 */
1315void stream_sock_read0(struct stream_interface *si)
1316{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001317 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001318 struct channel *ic = si_ic(si);
1319 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001320
Willy Tarreauafc8a222014-11-28 15:46:27 +01001321 ic->flags &= ~CF_SHUTR_NOW;
1322 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001323 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001324 ic->flags |= CF_SHUTR;
1325 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001326 si->flags &= ~SI_FL_WAIT_ROOM;
1327
1328 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1329 return;
1330
Willy Tarreauafc8a222014-11-28 15:46:27 +01001331 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001332 goto do_close;
1333
1334 if (si->flags & SI_FL_NOHALF) {
1335 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001336 /* force flag on ssl to keep stream in cache */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001337 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001338 goto do_close;
1339 }
1340
1341 /* otherwise that's just a normal read shutdown */
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001342 return;
1343
1344 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001345 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaua553ae92017-10-05 18:52:17 +02001346 cs_close(cs);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001347
Willy Tarreauafc8a222014-11-28 15:46:27 +01001348 oc->flags &= ~CF_SHUTW_NOW;
1349 oc->flags |= CF_SHUTW;
1350 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001351
1352 si->flags &= ~(SI_FL_WAIT_DATA | SI_FL_WAIT_ROOM);
1353
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001354 si->state = SI_ST_DIS;
1355 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001356 return;
1357}
1358
Willy Tarreau651e1822015-09-23 20:06:13 +02001359/* Callback to be used by applet handlers upon completion. It updates the stream
1360 * (which may or may not take this opportunity to try to forward data), then
Emeric Brun2802b072017-06-30 14:11:56 +02001361 * may re-enable the applet's based on the channels and stream interface's final
Willy Tarreau651e1822015-09-23 20:06:13 +02001362 * states.
1363 */
Willy Tarreauaa977ba2015-09-25 11:45:06 +02001364void si_applet_wake_cb(struct stream_interface *si)
Willy Tarreaue5f86492015-04-19 15:16:35 +02001365{
Willy Tarreaueca572f2015-09-25 19:11:55 +02001366 struct channel *ic = si_ic(si);
1367
1368 /* If the applet wants to write and the channel is closed, it's a
1369 * broken pipe and it must be reported.
1370 */
1371 if ((si->flags & SI_FL_WANT_PUT) && (ic->flags & CF_SHUTR))
1372 si->flags |= SI_FL_ERR;
1373
Willy Tarreau651e1822015-09-23 20:06:13 +02001374 /* update the stream-int, channels, and possibly wake the stream up */
1375 stream_int_notify(si);
Willy Tarreaue5f86492015-04-19 15:16:35 +02001376
Bertrand Jacquin874a35c2018-09-10 21:26:07 +01001377 /* stream_int_notify may pass through checksnd and released some
Emeric Brun2802b072017-06-30 14:11:56 +02001378 * WAIT_ROOM flags. The process_stream will consider those flags
1379 * to wakeup the appctx but in the case the task is not in runqueue
1380 * we may have to wakeup the appctx immediately.
1381 */
1382 if (!task_in_rq(si_task(si)))
1383 stream_int_update_applet(si);
1384}
Willy Tarreau452c7d52015-09-25 10:39:16 +02001385
1386/* Updates the activity status of an applet outside of the applet handler based
1387 * on the channel's flags and the stream interface's flags. It needs to be
1388 * called once after the channels' flags have settled down and the stream has
1389 * been updated. It is not designed to be called from within the applet handler
1390 * itself.
Willy Tarreau563cc372015-04-19 18:13:56 +02001391 */
1392void stream_int_update_applet(struct stream_interface *si)
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001393{
Willy Tarreaufe127932015-04-21 19:23:39 +02001394 if (((si->flags & (SI_FL_WANT_PUT|SI_FL_WAIT_ROOM)) == SI_FL_WANT_PUT) ||
1395 ((si->flags & (SI_FL_WANT_GET|SI_FL_WAIT_DATA)) == SI_FL_WANT_GET))
Willy Tarreau563cc372015-04-19 18:13:56 +02001396 appctx_wakeup(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001397}
1398
1399/*
1400 * This function performs a shutdown-read on a stream interface attached to an
1401 * applet in a connected or init state (it does nothing for other states). It
1402 * either shuts the read side or marks itself as closed. The buffer flags are
1403 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1404 * we also forward the close to the write side. The owner task is woken up if
1405 * it exists.
1406 */
1407static void stream_int_shutr_applet(struct stream_interface *si)
1408{
1409 struct channel *ic = si_ic(si);
1410
1411 ic->flags &= ~CF_SHUTR_NOW;
1412 if (ic->flags & CF_SHUTR)
1413 return;
1414 ic->flags |= CF_SHUTR;
1415 ic->rex = TICK_ETERNITY;
1416 si->flags &= ~SI_FL_WAIT_ROOM;
1417
Willy Tarreau828824a2015-04-19 17:20:03 +02001418 /* Note: on shutr, we don't call the applet */
1419
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001420 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1421 return;
1422
1423 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau958f0742015-09-25 20:24:26 +02001424 si_applet_release(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001425 si->state = SI_ST_DIS;
1426 si->exp = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001427 }
1428 else if (si->flags & SI_FL_NOHALF) {
1429 /* we want to immediately forward this close to the write side */
1430 return stream_int_shutw_applet(si);
1431 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001432}
1433
1434/*
1435 * This function performs a shutdown-write on a stream interface attached to an
1436 * applet in a connected or init state (it does nothing for other states). It
1437 * either shuts the write side or marks itself as closed. The buffer flags are
1438 * updated to reflect the new state. It does also close everything if the SI
1439 * was marked as being in error state. The owner task is woken up if it exists.
1440 */
1441static void stream_int_shutw_applet(struct stream_interface *si)
1442{
1443 struct channel *ic = si_ic(si);
1444 struct channel *oc = si_oc(si);
1445
1446 oc->flags &= ~CF_SHUTW_NOW;
1447 if (oc->flags & CF_SHUTW)
1448 return;
1449 oc->flags |= CF_SHUTW;
1450 oc->wex = TICK_ETERNITY;
1451 si->flags &= ~SI_FL_WAIT_DATA;
1452
Hongbo Longe39683c2017-03-10 18:41:51 +01001453 if (tick_isset(si->hcto)) {
1454 ic->rto = si->hcto;
1455 ic->rex = tick_add(now_ms, ic->rto);
1456 }
1457
Willy Tarreau828824a2015-04-19 17:20:03 +02001458 /* on shutw we always wake the applet up */
1459 appctx_wakeup(si_appctx(si));
1460
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001461 switch (si->state) {
1462 case SI_ST_EST:
1463 /* we have to shut before closing, otherwise some short messages
1464 * may never leave the system, especially when there are remaining
1465 * unread data in the socket input buffer, or when nolinger is set.
1466 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1467 * no risk so we close both sides immediately.
1468 */
1469 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1470 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1471 return;
1472
1473 /* fall through */
1474 case SI_ST_CON:
1475 case SI_ST_CER:
1476 case SI_ST_QUE:
1477 case SI_ST_TAR:
1478 /* Note that none of these states may happen with applets */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001479 si_applet_release(si);
Willy Tarreau958f0742015-09-25 20:24:26 +02001480 si->state = SI_ST_DIS;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001481 default:
1482 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
1483 ic->flags &= ~CF_SHUTR_NOW;
1484 ic->flags |= CF_SHUTR;
1485 ic->rex = TICK_ETERNITY;
1486 si->exp = TICK_ETERNITY;
1487 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001488}
1489
1490/* chk_rcv function for applets */
1491static void stream_int_chk_rcv_applet(struct stream_interface *si)
1492{
1493 struct channel *ic = si_ic(si);
1494
1495 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1496 __FUNCTION__,
1497 si, si->state, ic->flags, si_oc(si)->flags);
1498
1499 if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ))))
1500 return;
Willy Tarreau828824a2015-04-19 17:20:03 +02001501 /* here we only wake the applet up if it was waiting for some room */
1502 if (!(si->flags & SI_FL_WAIT_ROOM))
1503 return;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001504
Willy Tarreau828824a2015-04-19 17:20:03 +02001505 if (channel_may_recv(ic) && !ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001506 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001507 appctx_wakeup(si_appctx(si));
Thierry FOURNIER5bc2cbf2015-09-04 18:40:36 +02001508 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001509}
1510
1511/* chk_snd function for applets */
1512static void stream_int_chk_snd_applet(struct stream_interface *si)
1513{
1514 struct channel *oc = si_oc(si);
1515
1516 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1517 __FUNCTION__,
1518 si, si->state, si_ic(si)->flags, oc->flags);
1519
1520 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1521 return;
1522
Willy Tarreau828824a2015-04-19 17:20:03 +02001523 /* we only wake the applet up if it was waiting for some data */
1524
1525 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001526 return;
1527
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001528 if (!tick_isset(oc->wex))
1529 oc->wex = tick_add_ifset(now_ms, oc->wto);
1530
Willy Tarreau828824a2015-04-19 17:20:03 +02001531 if (!channel_is_empty(oc)) {
1532 /* (re)start sending */
1533 appctx_wakeup(si_appctx(si));
1534 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001535}
1536
Willy Tarreaudded32d2008-11-30 19:48:07 +01001537/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001538 * Local variables:
1539 * c-indent-level: 8
1540 * c-basic-offset: 8
1541 * End:
1542 */