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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 Houchard9aaf7782017-09-13 18:30:23 +020054static void si_cs_recv_cb(struct conn_stream *cs);
55static void si_cs_send_cb(struct conn_stream *cs);
56static int si_cs_wake_cb(struct conn_stream *cs);
57static int si_idle_conn_wake_cb(struct conn_stream *cs);
58static void si_idle_conn_null_cb(struct conn_stream *cs);
Willy Tarreauf873d752012-05-11 17:47:17 +020059
Willy Tarreauc5788912012-08-24 18:12:41 +020060/* stream-interface operations for embedded tasks */
61struct si_ops si_embedded_ops = {
Willy Tarreau5c979a92012-05-07 17:15:39 +020062 .chk_rcv = stream_int_chk_rcv,
63 .chk_snd = stream_int_chk_snd,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020064 .shutr = stream_int_shutr,
65 .shutw = stream_int_shutw,
Willy Tarreau5c979a92012-05-07 17:15:39 +020066};
67
Willy Tarreauc5788912012-08-24 18:12:41 +020068/* stream-interface operations for connections */
69struct si_ops si_conn_ops = {
70 .update = stream_int_update_conn,
71 .chk_rcv = stream_int_chk_rcv_conn,
72 .chk_snd = stream_int_chk_snd_conn,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020073 .shutr = stream_int_shutr_conn,
74 .shutw = stream_int_shutw_conn,
Willy Tarreauc5788912012-08-24 18:12:41 +020075};
76
Willy Tarreaud45b9f82015-04-13 16:30:14 +020077/* stream-interface operations for connections */
78struct si_ops si_applet_ops = {
79 .update = stream_int_update_applet,
80 .chk_rcv = stream_int_chk_rcv_applet,
81 .chk_snd = stream_int_chk_snd_applet,
82 .shutr = stream_int_shutr_applet,
83 .shutw = stream_int_shutw_applet,
84};
85
Willy Tarreau74beec32012-10-03 00:41:04 +020086struct data_cb si_conn_cb = {
Olivier Houchard9aaf7782017-09-13 18:30:23 +020087 .recv = si_cs_recv_cb,
88 .send = si_cs_send_cb,
89 .wake = si_cs_wake_cb,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +010090 .name = "STRM",
Willy Tarreauc5788912012-08-24 18:12:41 +020091};
92
Willy Tarreau27375622013-12-17 00:00:28 +010093struct data_cb si_idle_conn_cb = {
94 .recv = si_idle_conn_null_cb,
95 .send = si_idle_conn_null_cb,
96 .wake = si_idle_conn_wake_cb,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +010097 .name = "IDLE",
Willy Tarreau27375622013-12-17 00:00:28 +010098};
99
Willy Tarreaucff64112008-11-03 06:26:53 +0100100/*
101 * This function only has to be called once after a wakeup event in case of
102 * suspected timeout. It controls the stream interface timeouts and sets
103 * si->flags accordingly. It does NOT close anything, as this timeout may
104 * be used for any purpose. It returns 1 if the timeout fired, otherwise
105 * zero.
106 */
107int stream_int_check_timeouts(struct stream_interface *si)
108{
109 if (tick_is_expired(si->exp, now_ms)) {
110 si->flags |= SI_FL_EXP;
111 return 1;
112 }
113 return 0;
114}
115
Willy Tarreaufe3718a2008-11-30 18:14:12 +0100116/* to be called only when in SI_ST_DIS with SI_FL_ERR */
Willy Tarreaucff64112008-11-03 06:26:53 +0100117void stream_int_report_error(struct stream_interface *si)
118{
119 if (!si->err_type)
120 si->err_type = SI_ET_DATA_ERR;
121
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100122 si_oc(si)->flags |= CF_WRITE_ERROR;
123 si_ic(si)->flags |= CF_READ_ERROR;
Willy Tarreaucff64112008-11-03 06:26:53 +0100124}
125
126/*
Willy Tarreaudded32d2008-11-30 19:48:07 +0100127 * Returns a message to the client ; the connection is shut down for read,
128 * and the request is cleared so that no server connection can be initiated.
129 * The buffer is marked for read shutdown on the other side to protect the
130 * message, and the buffer write is enabled. The message is contained in a
Willy Tarreau148d0992010-01-10 10:21:21 +0100131 * "chunk". If it is null, then an empty message is used. The reply buffer does
132 * not need to be empty before this, and its contents will not be overwritten.
133 * The primary goal of this function is to return error messages to a client.
Willy Tarreaudded32d2008-11-30 19:48:07 +0100134 */
135void stream_int_retnclose(struct stream_interface *si, const struct chunk *msg)
136{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100137 struct channel *ic = si_ic(si);
138 struct channel *oc = si_oc(si);
139
140 channel_auto_read(ic);
141 channel_abort(ic);
142 channel_auto_close(ic);
143 channel_erase(ic);
144 channel_truncate(oc);
Willy Tarreau798e1282010-12-12 13:06:00 +0100145
Willy Tarreau148d0992010-01-10 10:21:21 +0100146 if (likely(msg && msg->len))
Willy Tarreau06d80a92017-10-19 14:32:15 +0200147 co_inject(oc, msg->str, msg->len);
Willy Tarreaudded32d2008-11-30 19:48:07 +0100148
Willy Tarreauafc8a222014-11-28 15:46:27 +0100149 oc->wex = tick_add_ifset(now_ms, oc->wto);
150 channel_auto_read(oc);
151 channel_auto_close(oc);
152 channel_shutr_now(oc);
Willy Tarreau5d881d02009-12-27 22:51:06 +0100153}
154
Willy Tarreau4a36b562012-08-06 19:31:45 +0200155/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200156 * This function performs a shutdown-read on a detached stream interface in a
157 * connected or init state (it does nothing for other states). It either shuts
158 * the read side or marks itself as closed. The buffer flags are updated to
159 * reflect the new state. If the stream interface has SI_FL_NOHALF, we also
160 * forward the close to the write side. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200161 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200162static void stream_int_shutr(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200163{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100164 struct channel *ic = si_ic(si);
165
166 ic->flags &= ~CF_SHUTR_NOW;
167 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200168 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100169 ic->flags |= CF_SHUTR;
170 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200171 si->flags &= ~SI_FL_WAIT_ROOM;
172
173 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200174 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200175
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100176 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200177 si->state = SI_ST_DIS;
178 si->exp = TICK_ETERNITY;
Willy Tarreaud8ccffe2010-09-07 16:16:50 +0200179 }
Willy Tarreau4a36b562012-08-06 19:31:45 +0200180 else if (si->flags & SI_FL_NOHALF) {
181 /* we want to immediately forward this close to the write side */
182 return stream_int_shutw(si);
183 }
Willy Tarreau0bd05ea2010-07-02 11:18:03 +0200184
Willy Tarreau4a36b562012-08-06 19:31:45 +0200185 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100186 if (!(si->flags & SI_FL_DONT_WAKE))
187 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200188}
189
Willy Tarreau4a36b562012-08-06 19:31:45 +0200190/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200191 * This function performs a shutdown-write on a detached stream interface in a
192 * connected or init state (it does nothing for other states). It either shuts
193 * the write side or marks itself as closed. The buffer flags are updated to
194 * reflect the new state. It does also close everything if the SI was marked as
195 * being in error state. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200196 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200197static void stream_int_shutw(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200198{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100199 struct channel *ic = si_ic(si);
200 struct channel *oc = si_oc(si);
201
202 oc->flags &= ~CF_SHUTW_NOW;
203 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200204 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100205 oc->flags |= CF_SHUTW;
206 oc->wex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200207 si->flags &= ~SI_FL_WAIT_DATA;
208
Hongbo Longe39683c2017-03-10 18:41:51 +0100209 if (tick_isset(si->hcto)) {
210 ic->rto = si->hcto;
211 ic->rex = tick_add(now_ms, ic->rto);
212 }
213
Willy Tarreaufb90d942009-09-05 20:57:35 +0200214 switch (si->state) {
215 case SI_ST_EST:
Willy Tarreau4a36b562012-08-06 19:31:45 +0200216 /* we have to shut before closing, otherwise some short messages
217 * may never leave the system, especially when there are remaining
218 * unread data in the socket input buffer, or when nolinger is set.
219 * However, if SI_FL_NOLINGER is explicitly set, we know there is
220 * no risk so we close both sides immediately.
221 */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200222 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
Willy Tarreauafc8a222014-11-28 15:46:27 +0100223 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200224 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200225
226 /* fall through */
227 case SI_ST_CON:
228 case SI_ST_CER:
Willy Tarreau32d3ee92010-12-29 14:03:02 +0100229 case SI_ST_QUE:
230 case SI_ST_TAR:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200231 /* Note that none of these states may happen with applets */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200232 si->state = SI_ST_DIS;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200233 default:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200234 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100235 ic->flags &= ~CF_SHUTR_NOW;
236 ic->flags |= CF_SHUTR;
237 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200238 si->exp = TICK_ETERNITY;
239 }
240
Willy Tarreau4a36b562012-08-06 19:31:45 +0200241 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100242 if (!(si->flags & SI_FL_DONT_WAKE))
243 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200244}
245
246/* default chk_rcv function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200247static void stream_int_chk_rcv(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200248{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100249 struct channel *ic = si_ic(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200250
Willy Tarreauafc8a222014-11-28 15:46:27 +0100251 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200252 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100253 si, si->state, ic->flags, si_oc(si)->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200254
Willy Tarreauafc8a222014-11-28 15:46:27 +0100255 if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ))))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200256 return;
257
Willy Tarreauafc8a222014-11-28 15:46:27 +0100258 if (!channel_may_recv(ic) || ic->pipe) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200259 /* stop reading */
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +0200260 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200261 }
262 else {
263 /* (re)start reading */
264 si->flags &= ~SI_FL_WAIT_ROOM;
Willy Tarreau07373b82014-11-28 12:08:47 +0100265 if (!(si->flags & SI_FL_DONT_WAKE))
266 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200267 }
268}
269
270/* default chk_snd function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200271static void stream_int_chk_snd(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200272{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100273 struct channel *oc = si_oc(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200274
Willy Tarreauafc8a222014-11-28 15:46:27 +0100275 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200276 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100277 si, si->state, si_ic(si)->flags, oc->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200278
Willy Tarreauafc8a222014-11-28 15:46:27 +0100279 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200280 return;
281
282 if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100283 channel_is_empty(oc)) /* called with nothing to send ! */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200284 return;
285
286 /* Otherwise there are remaining data to be sent in the buffer,
287 * so we tell the handler.
288 */
289 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100290 if (!tick_isset(oc->wex))
291 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200292
Willy Tarreau07373b82014-11-28 12:08:47 +0100293 if (!(si->flags & SI_FL_DONT_WAKE))
294 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200295}
296
Willy Tarreaua9ff5e62015-07-19 18:46:30 +0200297/* Register an applet to handle a stream_interface as a new appctx. The SI will
298 * wake it up everytime it is solicited. The appctx must be deleted by the task
299 * handler using si_release_endpoint(), possibly from within the function itself.
300 * It also pre-initializes the applet's context and returns it (or NULL in case
301 * it could not be allocated).
Willy Tarreaufb90d942009-09-05 20:57:35 +0200302 */
Willy Tarreau30576452015-04-13 13:50:30 +0200303struct appctx *stream_int_register_handler(struct stream_interface *si, struct applet *app)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200304{
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100305 struct appctx *appctx;
306
Willy Tarreau07373b82014-11-28 12:08:47 +0100307 DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si_task(si));
Willy Tarreaufb90d942009-09-05 20:57:35 +0200308
Willy Tarreaua7513f52015-04-05 00:15:26 +0200309 appctx = si_alloc_appctx(si, app);
Willy Tarreaua69fc9f2014-12-22 19:34:00 +0100310 if (!appctx)
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100311 return NULL;
312
Willy Tarreaufe127932015-04-21 19:23:39 +0200313 si_applet_cant_get(si);
Willy Tarreau828824a2015-04-19 17:20:03 +0200314 appctx_wakeup(appctx);
Willy Tarreau1fbe1c92013-12-01 09:35:41 +0100315 return si_appctx(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200316}
317
Willy Tarreau2c6be842012-07-06 17:12:34 +0200318/* This callback is used to send a valid PROXY protocol line to a socket being
Willy Tarreauafad0e02012-08-09 14:45:22 +0200319 * established. It returns 0 if it fails in a fatal way or needs to poll to go
320 * further, otherwise it returns non-zero and removes itself from the connection's
Willy Tarreaua1a74742012-08-24 12:14:49 +0200321 * flags (the bit is provided in <flag> by the caller). It is designed to be
322 * called by the connection handler and relies on it to commit polling changes.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200323 * Note that it can emit a PROXY line by relying on the other end's address
324 * when the connection is attached to a stream interface, or by resolving the
325 * local address otherwise (also called a LOCAL line).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200326 */
327int conn_si_send_proxy(struct connection *conn, unsigned int flag)
328{
Willy Tarreau2c6be842012-07-06 17:12:34 +0200329 /* we might have been called just after an asynchronous shutw */
Willy Tarreaua1a74742012-08-24 12:14:49 +0200330 if (conn->flags & CO_FL_SOCK_WR_SH)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200331 goto out_error;
332
Willy Tarreaud02cdd22013-12-15 10:23:20 +0100333 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200334 goto out_error;
335
Willy Tarreau2c6be842012-07-06 17:12:34 +0200336 /* If we have a PROXY line to send, we'll use this to validate the
337 * connection, in which case the connection is validated only once
338 * we've sent the whole proxy line. Otherwise we use connect().
339 */
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200340 while (conn->send_proxy_ofs) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200341 struct conn_stream *cs;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200342 int ret;
343
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200344 cs = conn->mux_ctx;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200345 /* The target server expects a PROXY line to be sent first.
346 * If the send_proxy_ofs is negative, it corresponds to the
347 * offset to start sending from then end of the proxy string
348 * (which is recomputed every time since it's constant). If
349 * it is positive, it means we have to send from the start.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200350 * We can only send a "normal" PROXY line when the connection
351 * is attached to a stream interface. Otherwise we can only
352 * send a LOCAL line (eg: for use with health checks).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200353 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200354 if (conn->mux == &mux_pt_ops && cs->data_cb == &si_conn_cb) {
355 struct stream_interface *si = cs->data;
356 struct conn_stream *remote_cs = objt_cs(si_opposite(si)->end);
357 ret = make_proxy_line(trash.str, trash.size, objt_server(conn->target), remote_cs ? remote_cs->conn : NULL);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200358 }
359 else {
360 /* The target server expects a LOCAL line to be sent first. Retrieving
361 * local or remote addresses may fail until the connection is established.
362 */
363 conn_get_from_addr(conn);
364 if (!(conn->flags & CO_FL_ADDR_FROM_SET))
365 goto out_wait;
366
367 conn_get_to_addr(conn);
368 if (!(conn->flags & CO_FL_ADDR_TO_SET))
369 goto out_wait;
370
David Safb76832014-05-08 23:42:08 -0400371 ret = make_proxy_line(trash.str, trash.size, 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 Tarreau0a03c0f2015-03-13 00:05:28 +0100383 ret = conn_sock_send(conn, trash.str + ret + conn->send_proxy_ofs, -conn->send_proxy_ofs,
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200384 (conn->flags & CO_FL_XPRT_WR_ENA) ? MSG_MORE : 0);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200385
Willy Tarreau0a03c0f2015-03-13 00:05:28 +0100386 if (ret < 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200387 goto out_error;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200388
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200389 conn->send_proxy_ofs += ret; /* becomes zero once complete */
390 if (conn->send_proxy_ofs != 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200391 goto out_wait;
392
393 /* OK we've sent the whole line, we're connected */
Willy Tarreau7fe45692013-12-04 23:37:56 +0100394 break;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200395 }
396
Willy Tarreaua1a74742012-08-24 12:14:49 +0200397 /* The connection is ready now, simply return and let the connection
398 * handler notify upper layers if needed.
Willy Tarreau2c6be842012-07-06 17:12:34 +0200399 */
400 if (conn->flags & CO_FL_WAIT_L4_CONN)
401 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200402 conn->flags &= ~flag;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200403 return 1;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200404
405 out_error:
Willy Tarreauafad0e02012-08-09 14:45:22 +0200406 /* Write error on the file descriptor */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200407 conn->flags |= CO_FL_ERROR;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200408 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200409
410 out_wait:
Willy Tarreaua1a74742012-08-24 12:14:49 +0200411 __conn_sock_stop_recv(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200412 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200413}
414
Willy Tarreau27375622013-12-17 00:00:28 +0100415
416/* Tiny I/O callback called on recv/send I/O events on idle connections.
417 * It simply sets the CO_FL_SOCK_RD_SH flag so that si_idle_conn_wake_cb()
418 * is notified and can kill the connection.
419 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200420static void si_idle_conn_null_cb(struct conn_stream *cs)
Willy Tarreau27375622013-12-17 00:00:28 +0100421{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200422 conn_sock_drain(cs->conn);
Willy Tarreau27375622013-12-17 00:00:28 +0100423}
424
425/* Callback to be used by connection I/O handlers when some activity is detected
426 * on an idle server connection. Its main purpose is to kill the connection once
427 * a close was detected on it. It returns 0 if it did nothing serious, or -1 if
428 * it killed the connection.
429 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200430static int si_idle_conn_wake_cb(struct conn_stream *cs)
Willy Tarreau27375622013-12-17 00:00:28 +0100431{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200432 struct connection *conn = cs->conn;
433 struct stream_interface *si = cs->data;
Willy Tarreau27375622013-12-17 00:00:28 +0100434
435 if (!conn_ctrl_ready(conn))
436 return 0;
437
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200438 if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH) || cs->flags & CS_FL_ERROR) {
Willy Tarreau27375622013-12-17 00:00:28 +0100439 /* warning, we can't do anything on <conn> after this call ! */
Willy Tarreauc4b56e42015-09-23 17:56:02 +0200440 si_release_endpoint(si);
Willy Tarreau27375622013-12-17 00:00:28 +0100441 return -1;
442 }
443 return 0;
444}
445
Willy Tarreau615f28b2015-09-23 18:40:09 +0200446/* This function is the equivalent to stream_int_update() except that it's
447 * designed to be called from outside the stream handlers, typically the lower
448 * layers (applets, connections) after I/O completion. After updating the stream
449 * interface and timeouts, it will try to forward what can be forwarded, then to
450 * wake the associated task up if an important event requires special handling.
451 * It should not be called from within the stream itself, stream_int_update()
452 * is designed for this.
453 */
454void stream_int_notify(struct stream_interface *si)
455{
456 struct channel *ic = si_ic(si);
457 struct channel *oc = si_oc(si);
458
459 /* process consumer side */
460 if (channel_is_empty(oc)) {
Olivier Houcharde9bed532017-11-16 17:49:25 +0100461 struct connection *conn = objt_cs(si->end) ? objt_cs(si->end)->conn : NULL;
462
Willy Tarreau615f28b2015-09-23 18:40:09 +0200463 if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) &&
Olivier Houcharde9bed532017-11-16 17:49:25 +0100464 (si->state == SI_ST_EST) && (!conn || !(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS))))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200465 si_shutw(si);
466 oc->wex = TICK_ETERNITY;
467 }
468
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100469 /* indicate that we may be waiting for data from the output channel or
470 * we're about to close and can't expect more data if SHUTW_NOW is there.
471 */
Willy Tarreau615f28b2015-09-23 18:40:09 +0200472 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && channel_may_recv(oc))
473 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100474 else if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)
475 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200476
477 /* update OC timeouts and wake the other side up if it's waiting for room */
478 if (oc->flags & CF_WRITE_ACTIVITY) {
479 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
480 !channel_is_empty(oc))
481 if (tick_isset(oc->wex))
482 oc->wex = tick_add_ifset(now_ms, oc->wto);
483
484 if (!(si->flags & SI_FL_INDEP_STR))
485 if (tick_isset(ic->rex))
486 ic->rex = tick_add_ifset(now_ms, ic->rto);
487
488 if (likely((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL &&
489 channel_may_recv(oc) &&
490 (si_opposite(si)->flags & SI_FL_WAIT_ROOM)))
491 si_chk_rcv(si_opposite(si));
492 }
493
494 /* Notify the other side when we've injected data into the IC that
495 * needs to be forwarded. We can do fast-forwarding as soon as there
496 * are output data, but we avoid doing this if some of the data are
497 * not yet scheduled for being forwarded, because it is very likely
498 * that it will be done again immediately afterwards once the following
499 * data are parsed (eg: HTTP chunking). We only SI_FL_WAIT_ROOM once
500 * we've emptied *some* of the output buffer, and not just when there
501 * is available room, because applets are often forced to stop before
502 * the buffer is full. We must not stop based on input data alone because
503 * an HTTP parser might need more data to complete the parsing.
504 */
Bin Wang95fad5b2017-09-15 14:56:40 +0800505
506 /* ensure it's only set if a write attempt has succeeded */
507 ic->flags &= ~CF_WRITE_PARTIAL;
508
Willy Tarreau615f28b2015-09-23 18:40:09 +0200509 if (!channel_is_empty(ic) &&
510 (si_opposite(si)->flags & SI_FL_WAIT_DATA) &&
511 (ic->buf->i == 0 || ic->pipe)) {
512 int new_len, last_len;
513
514 last_len = ic->buf->o;
515 if (ic->pipe)
516 last_len += ic->pipe->data;
517
518 si_chk_snd(si_opposite(si));
519
520 new_len = ic->buf->o;
521 if (ic->pipe)
522 new_len += ic->pipe->data;
523
524 /* check if the consumer has freed some space either in the
525 * buffer or in the pipe.
526 */
527 if (channel_may_recv(ic) && new_len < last_len)
528 si->flags &= ~SI_FL_WAIT_ROOM;
529 }
530
531 if (si->flags & SI_FL_WAIT_ROOM) {
532 ic->rex = TICK_ETERNITY;
533 }
534 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL &&
535 channel_may_recv(ic)) {
536 /* we must re-enable reading if si_chk_snd() has freed some space */
537 if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex))
538 ic->rex = tick_add_ifset(now_ms, ic->rto);
539 }
540
541 /* wake the task up only when needed */
542 if (/* changes on the production side */
543 (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
544 si->state != SI_ST_EST ||
545 (si->flags & SI_FL_ERR) ||
546 ((ic->flags & CF_READ_PARTIAL) &&
547 (!ic->to_forward || si_opposite(si)->state != SI_ST_EST)) ||
548
549 /* changes on the consumption side */
550 (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
Christopher Fauletc5a9d5b2017-11-09 09:36:43 +0100551 ((oc->flags & (CF_WRITE_ACTIVITY|CF_WRITE_EVENT)) &&
Willy Tarreau615f28b2015-09-23 18:40:09 +0200552 ((oc->flags & CF_SHUTW) ||
553 ((oc->flags & CF_WAKE_WRITE) &&
554 (si_opposite(si)->state != SI_ST_EST ||
555 (channel_is_empty(oc) && !oc->to_forward)))))) {
556 task_wakeup(si_task(si), TASK_WOKEN_IO);
557 }
558 if (ic->flags & CF_READ_ACTIVITY)
559 ic->flags &= ~CF_READ_DONTWAIT;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200560}
561
562
Willy Tarreau651e1822015-09-23 20:06:13 +0200563/* Callback to be used by connection I/O handlers upon completion. It propagates
564 * connection flags to the stream interface, updates the stream (which may or
565 * may not take this opportunity to try to forward data), then update the
566 * connection's polling based on the channels and stream interface's final
567 * states. The function always returns 0.
Willy Tarreau100c4672012-08-20 12:06:26 +0200568 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200569static int si_cs_wake_cb(struct conn_stream *cs)
Willy Tarreaufd31e532012-07-23 18:24:25 +0200570{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200571 struct connection *conn = cs->conn;
572 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100573 struct channel *ic = si_ic(si);
574 struct channel *oc = si_oc(si);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200575
Willy Tarreau651e1822015-09-23 20:06:13 +0200576 /* First step, report to the stream-int what was detected at the
577 * connection layer : errors and connection establishment.
578 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200579 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreau3c55ec22012-07-23 19:19:51 +0200580 si->flags |= SI_FL_ERR;
581
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200582 /* If we had early data, and the handshake ended, then
583 * we can remove the flag, and attempt to wake the task up,
584 * in the event there's an analyser waiting for the end of
585 * the handshake.
586 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +0100587 if (!(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS)) &&
588 (cs->flags & CS_FL_WAIT_FOR_HS)) {
589 cs->flags &= ~CS_FL_WAIT_FOR_HS;
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200590 task_wakeup(si_task(si), TASK_WOKEN_MSG);
591 }
592
Willy Tarreau52821e22017-03-18 17:11:37 +0100593 if ((si->state < SI_ST_EST) &&
594 (conn->flags & (CO_FL_CONNECTED | CO_FL_HANDSHAKE)) == CO_FL_CONNECTED) {
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200595 si->exp = TICK_ETERNITY;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100596 oc->flags |= CF_WRITE_NULL;
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200597 }
598
Willy Tarreau651e1822015-09-23 20:06:13 +0200599 /* Second step : update the stream-int and channels, try to forward any
600 * pending data, then possibly wake the stream up based on the new
601 * stream-int status.
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200602 */
Willy Tarreau651e1822015-09-23 20:06:13 +0200603 stream_int_notify(si);
Christopher Fauleta73e59b2016-12-09 17:30:18 +0100604 channel_release_buffer(ic, &(si_strm(si)->buffer_wait));
Willy Tarreauea3cc482015-09-23 19:37:00 +0200605
Willy Tarreau651e1822015-09-23 20:06:13 +0200606 /* Third step : update the connection's polling status based on what
607 * was done above (eg: maybe some buffers got emptied).
608 */
609 if (channel_is_empty(oc))
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200610 __cs_stop_send(cs);
Willy Tarreauea3cc482015-09-23 19:37:00 +0200611
Willy Tarreaufd31e532012-07-23 18:24:25 +0200612
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200613 if (si->flags & SI_FL_WAIT_ROOM) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200614 __cs_stop_recv(cs);
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200615 }
Willy Tarreauafc8a222014-11-28 15:46:27 +0100616 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL &&
617 channel_may_recv(ic)) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200618 __cs_want_recv(cs);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200619 }
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200620 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200621}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200622
Willy Tarreau5368d802012-08-21 18:22:06 +0200623/*
624 * This function is called to send buffer data to a stream socket.
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200625 * It calls the mux layer's snd_buf function. It relies on the
Godbach4f489902013-12-04 17:24:06 +0800626 * caller to commit polling changes. The caller should check conn->flags
627 * for errors.
Willy Tarreau5368d802012-08-21 18:22:06 +0200628 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200629static void si_cs_send(struct conn_stream *cs)
Willy Tarreau5368d802012-08-21 18:22:06 +0200630{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200631 struct connection *conn = cs->conn;
632 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100633 struct channel *oc = si_oc(si);
Willy Tarreau5368d802012-08-21 18:22:06 +0200634 int ret;
635
Bin Wang95fad5b2017-09-15 14:56:40 +0800636 /* ensure it's only set if a write attempt has succeeded */
637 oc->flags &= ~CF_WRITE_PARTIAL;
638
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200639 if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) {
640 ret = conn->mux->snd_pipe(cs, oc->pipe);
Willy Tarreau96199b12012-08-24 00:46:52 +0200641 if (ret > 0)
Christopher Fauletc5a9d5b2017-11-09 09:36:43 +0100642 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA | CF_WRITE_EVENT;
Willy Tarreau5368d802012-08-21 18:22:06 +0200643
Willy Tarreauafc8a222014-11-28 15:46:27 +0100644 if (!oc->pipe->data) {
645 put_pipe(oc->pipe);
646 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200647 }
648
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200649 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +0800650 return;
Willy Tarreau5368d802012-08-21 18:22:06 +0200651 }
652
653 /* At this point, the pipe is empty, but we may still have data pending
654 * in the normal buffer.
655 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100656 if (!oc->buf->o)
Godbach4f489902013-12-04 17:24:06 +0800657 return;
Willy Tarreau5368d802012-08-21 18:22:06 +0200658
Godbache68e02d2013-10-11 15:48:29 +0800659 /* when we're here, we already know that there is no spliced
Willy Tarreau5368d802012-08-21 18:22:06 +0200660 * data left, and that there are sendable buffered data.
661 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200662 if (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_HANDSHAKE)) &&
663 !(cs->flags & CS_FL_ERROR) && !(oc->flags & CF_SHUTW)) {
Willy Tarreau5368d802012-08-21 18:22:06 +0200664 /* check if we want to inform the kernel that we're interested in
665 * sending more data after this call. We want this if :
666 * - we're about to close after this last send and want to merge
667 * the ongoing FIN with the last segment.
668 * - we know we can't send everything at once and must get back
669 * here because of unaligned data
670 * - there is still a finite amount of data to forward
671 * The test is arranged so that the most common case does only 2
672 * tests.
673 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100674 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200675
Willy Tarreauafc8a222014-11-28 15:46:27 +0100676 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
677 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
Willy Tarreau4ac49282017-10-17 16:33:46 +0200678 (oc->flags & CF_EXPECT_MORE))) ||
Willy Tarreauecd2e152017-11-07 15:07:25 +0100679 ((oc->flags & CF_ISRESP) &&
680 ((oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW)) == (CF_AUTO_CLOSE|CF_SHUTW_NOW))))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100681 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200682
Willy Tarreauafc8a222014-11-28 15:46:27 +0100683 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100684 send_flag |= CO_SFL_STREAMER;
685
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200686 ret = conn->mux->snd_buf(cs, oc->buf, send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800687 if (ret > 0) {
Christopher Fauletc5a9d5b2017-11-09 09:36:43 +0100688 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA | CF_WRITE_EVENT;
Willy Tarreau5368d802012-08-21 18:22:06 +0200689
Willy Tarreauafc8a222014-11-28 15:46:27 +0100690 if (!oc->buf->o) {
Godbache68e02d2013-10-11 15:48:29 +0800691 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100692 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800693 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200694
Godbache68e02d2013-10-11 15:48:29 +0800695 /* if some data remain in the buffer, it's only because the
696 * system buffers are full, we will try next time.
697 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200698 }
Godbache68e02d2013-10-11 15:48:29 +0800699 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200700}
701
Willy Tarreau25f13102015-09-24 11:32:22 +0200702/* This function is designed to be called from within the stream handler to
703 * update the channels' expiration timers and the stream interface's flags
704 * based on the channels' flags. It needs to be called only once after the
705 * channels' flags have settled down, and before they are cleared, though it
706 * doesn't harm to call it as often as desired (it just slightly hurts
707 * performance). It must not be called from outside of the stream handler,
708 * as what it does will be used to compute the stream task's expiration.
709 */
710void stream_int_update(struct stream_interface *si)
711{
712 struct channel *ic = si_ic(si);
713 struct channel *oc = si_oc(si);
714
715 if (!(ic->flags & CF_SHUTR)) {
716 /* Read not closed, update FD status and timeout for reads */
717 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
718 /* stop reading */
719 if (!(si->flags & SI_FL_WAIT_ROOM)) {
720 if (!(ic->flags & CF_DONT_READ)) /* full */
721 si->flags |= SI_FL_WAIT_ROOM;
722 ic->rex = TICK_ETERNITY;
723 }
724 }
725 else {
726 /* (re)start reading and update timeout. Note: we don't recompute the timeout
727 * everytime we get here, otherwise it would risk never to expire. We only
728 * update it if is was not yet set. The stream socket handler will already
729 * have updated it if there has been a completed I/O.
730 */
731 si->flags &= ~SI_FL_WAIT_ROOM;
732 if (!(ic->flags & (CF_READ_NOEXP|CF_DONT_READ)) && !tick_isset(ic->rex))
733 ic->rex = tick_add_ifset(now_ms, ic->rto);
734 }
735 }
736
737 if (!(oc->flags & CF_SHUTW)) {
738 /* Write not closed, update FD status and timeout for writes */
739 if (channel_is_empty(oc)) {
740 /* stop writing */
741 if (!(si->flags & SI_FL_WAIT_DATA)) {
742 if ((oc->flags & CF_SHUTW_NOW) == 0)
743 si->flags |= SI_FL_WAIT_DATA;
744 oc->wex = TICK_ETERNITY;
745 }
746 }
747 else {
748 /* (re)start writing and update timeout. Note: we don't recompute the timeout
749 * everytime we get here, otherwise it would risk never to expire. We only
750 * update it if is was not yet set. The stream socket handler will already
751 * have updated it if there has been a completed I/O.
752 */
753 si->flags &= ~SI_FL_WAIT_DATA;
754 if (!tick_isset(oc->wex)) {
755 oc->wex = tick_add_ifset(now_ms, oc->wto);
756 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
757 /* Note: depending on the protocol, we don't know if we're waiting
758 * for incoming data or not. So in order to prevent the socket from
759 * expiring read timeouts during writes, we refresh the read timeout,
760 * except if it was already infinite or if we have explicitly setup
761 * independent streams.
762 */
763 ic->rex = tick_add_ifset(now_ms, ic->rto);
764 }
765 }
766 }
767 }
768}
769
Willy Tarreau452c7d52015-09-25 10:39:16 +0200770/* Updates the polling status of a connection outside of the connection handler
771 * based on the channel's flags and the stream interface's flags. It needs to be
772 * called once after the channels' flags have settled down and the stream has
773 * been updated. It is not designed to be called from within the connection
774 * handler itself.
Willy Tarreau100c4672012-08-20 12:06:26 +0200775 */
776void stream_int_update_conn(struct stream_interface *si)
777{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100778 struct channel *ic = si_ic(si);
779 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200780 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreau100c4672012-08-20 12:06:26 +0200781
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200782 if (!(ic->flags & CF_SHUTR)) {
783 /* Read not closed */
784 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic))
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200785 __cs_stop_recv(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200786 else
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200787 __cs_want_recv(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200788 }
789
790 if (!(oc->flags & CF_SHUTW)) {
791 /* Write not closed */
792 if (channel_is_empty(oc))
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200793 __cs_stop_send(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200794 else
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200795 __cs_want_send(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200796 }
797
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200798 cs_update_mux_polling(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200799}
800
801/*
802 * This function performs a shutdown-read on a stream interface attached to
803 * a connection in a connected or init state (it does nothing for other
804 * states). It either shuts the read side or marks itself as closed. The buffer
805 * flags are updated to reflect the new state. If the stream interface has
806 * SI_FL_NOHALF, we also forward the close to the write side. If a control
807 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +0200808 * descriptors are then shutdown or closed accordingly. The function
809 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200810 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200811static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200812{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200813 struct conn_stream *cs = __objt_cs(si->end);
814 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100815 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200816
Willy Tarreauafc8a222014-11-28 15:46:27 +0100817 ic->flags &= ~CF_SHUTR_NOW;
818 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200819 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100820 ic->flags |= CF_SHUTR;
821 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200822 si->flags &= ~SI_FL_WAIT_ROOM;
823
824 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200825 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200826
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100827 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaua553ae92017-10-05 18:52:17 +0200828 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200829 si->state = SI_ST_DIS;
830 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200831 }
832 else if (si->flags & SI_FL_NOHALF) {
833 /* we want to immediately forward this close to the write side */
834 return stream_int_shutw_conn(si);
835 }
836 else if (conn->ctrl) {
837 /* we want the caller to disable polling on this FD */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200838 cs_stop_recv(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200839 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200840}
841
842/*
843 * This function performs a shutdown-write on a stream interface attached to
844 * a connection in a connected or init state (it does nothing for other
845 * states). It either shuts the write side or marks itself as closed. The
846 * buffer flags are updated to reflect the new state. It does also close
847 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +0100848 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200849 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200850static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200851{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200852 struct conn_stream *cs = __objt_cs(si->end);
853 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100854 struct channel *ic = si_ic(si);
855 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200856
Willy Tarreauafc8a222014-11-28 15:46:27 +0100857 oc->flags &= ~CF_SHUTW_NOW;
858 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200859 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100860 oc->flags |= CF_SHUTW;
861 oc->wex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200862 si->flags &= ~SI_FL_WAIT_DATA;
863
Hongbo Longe39683c2017-03-10 18:41:51 +0100864 if (tick_isset(si->hcto)) {
865 ic->rto = si->hcto;
866 ic->rex = tick_add(now_ms, ic->rto);
867 }
868
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200869 switch (si->state) {
870 case SI_ST_EST:
871 /* we have to shut before closing, otherwise some short messages
872 * may never leave the system, especially when there are remaining
873 * unread data in the socket input buffer, or when nolinger is set.
874 * However, if SI_FL_NOLINGER is explicitly set, we know there is
875 * no risk so we close both sides immediately.
876 */
877 if (si->flags & SI_FL_ERR) {
878 /* quick close, the socket is alredy shut anyway */
879 }
880 else if (si->flags & SI_FL_NOLINGER) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200881 /* unclean data-layer shutdown, typically an aborted request
882 * or a forwarded shutdown from a client to a server due to
883 * option abortonclose. No need for the TLS layer to try to
884 * emit a shutdown message.
885 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200886 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200887 }
888 else {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200889 /* clean data-layer shutdown. This only happens on the
890 * frontend side, or on the backend side when forwarding
891 * a client close in TCP mode or in HTTP TUNNEL mode
892 * while option abortonclose is set. We want the TLS
893 * layer to try to signal it to the peer before we close.
894 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200895 cs_shutw(cs, CS_SHW_NORMAL);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200896
Willy Tarreaua553ae92017-10-05 18:52:17 +0200897 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
898 /* OK just a shutw, but we want the caller
899 * to disable polling on this FD if exists.
900 */
901 conn_cond_update_polling(conn);
902 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200903 }
904 }
905
906 /* fall through */
907 case SI_ST_CON:
908 /* we may have to close a pending connection, and mark the
909 * response buffer as shutr
910 */
Willy Tarreaua553ae92017-10-05 18:52:17 +0200911 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200912 /* fall through */
913 case SI_ST_CER:
914 case SI_ST_QUE:
915 case SI_ST_TAR:
916 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +0200917 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200918 default:
919 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100920 ic->flags &= ~CF_SHUTR_NOW;
921 ic->flags |= CF_SHUTR;
922 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200923 si->exp = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +0200924 }
925}
926
Willy Tarreau46a8d922012-08-20 12:38:36 +0200927/* This function is used for inter-stream-interface calls. It is called by the
928 * consumer to inform the producer side that it may be interested in checking
929 * for free space in the buffer. Note that it intentionally does not update
930 * timeouts, so that we can still check them later at wake-up. This function is
931 * dedicated to connection-based stream interfaces.
932 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200933static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +0200934{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100935 struct channel *ic = si_ic(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200936 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200937
Willy Tarreauafc8a222014-11-28 15:46:27 +0100938 if (unlikely(si->state > SI_ST_EST || (ic->flags & CF_SHUTR)))
Willy Tarreau46a8d922012-08-20 12:38:36 +0200939 return;
940
Willy Tarreauafc8a222014-11-28 15:46:27 +0100941 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
Willy Tarreau46a8d922012-08-20 12:38:36 +0200942 /* stop reading */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100943 if (!(ic->flags & CF_DONT_READ)) /* full */
Willy Tarreau46a8d922012-08-20 12:38:36 +0200944 si->flags |= SI_FL_WAIT_ROOM;
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200945 __cs_stop_recv(cs);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200946 }
947 else {
948 /* (re)start reading */
949 si->flags &= ~SI_FL_WAIT_ROOM;
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200950 __cs_want_recv(cs);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200951 }
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200952 cs_update_mux_polling(cs);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200953}
954
955
Willy Tarreaude5722c2012-08-20 15:01:10 +0200956/* This function is used for inter-stream-interface calls. It is called by the
957 * producer to inform the consumer side that it may be interested in checking
958 * for data in the buffer. Note that it intentionally does not update timeouts,
959 * so that we can still check them later at wake-up.
960 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200961static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +0200962{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100963 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200964 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +0200965
Bin Wang95fad5b2017-09-15 14:56:40 +0800966 /* ensure it's only set if a write attempt has succeeded */
967 oc->flags &= ~CF_WRITE_PARTIAL;
968
Willy Tarreauafc8a222014-11-28 15:46:27 +0100969 if (unlikely(si->state > SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +0200970 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +0200971
Willy Tarreauafc8a222014-11-28 15:46:27 +0100972 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +0200973 return;
974
Willy Tarreauafc8a222014-11-28 15:46:27 +0100975 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +0100976 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +0200977 return;
978
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200979 if (cs->flags & CS_FL_DATA_WR_ENA) {
Willy Tarreau5007d2a2013-07-18 22:09:48 +0200980 /* already subscribed to write notifications, will be called
981 * anyway, so let's avoid calling it especially if the reader
982 * is not ready.
983 */
984 return;
985 }
986
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200987 __cs_want_send(cs);
Willy Tarreaud29a0662012-12-10 16:33:38 +0100988
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200989 si_cs_send(cs);
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200990 if (cs->flags & CS_FL_ERROR || cs->conn->flags & CO_FL_ERROR) {
Willy Tarreau3b9c8502017-10-25 14:22:28 +0200991 /* Write error on the file descriptor */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200992 __cs_stop_both(cs);
Willy Tarreau3b9c8502017-10-25 14:22:28 +0200993 si->flags |= SI_FL_ERR;
994 goto out_wakeup;
Willy Tarreaude5722c2012-08-20 15:01:10 +0200995 }
996
997 /* OK, so now we know that some data might have been sent, and that we may
998 * have to poll first. We have to do that too if the buffer is not empty.
999 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001000 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001001 /* the connection is established but we can't write. Either the
1002 * buffer is empty, or we just refrain from sending because the
1003 * ->o limit was reached. Maybe we just wrote the last
1004 * chunk and need to close.
1005 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001006 __cs_stop_send(cs);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001007 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001008 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreaude5722c2012-08-20 15:01:10 +02001009 (si->state == SI_ST_EST)) {
1010 si_shutw(si);
1011 goto out_wakeup;
1012 }
1013
Willy Tarreauafc8a222014-11-28 15:46:27 +01001014 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001015 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001016 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001017 }
1018 else {
1019 /* Otherwise there are remaining data to be sent in the buffer,
1020 * which means we have to poll before doing so.
1021 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001022 __cs_want_send(cs);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001023 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001024 if (!tick_isset(oc->wex))
1025 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001026 }
1027
Willy Tarreauafc8a222014-11-28 15:46:27 +01001028 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1029 struct channel *ic = si_ic(si);
1030
Willy Tarreaude5722c2012-08-20 15:01:10 +02001031 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001032 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1033 !channel_is_empty(oc))
1034 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001035
Willy Tarreauafc8a222014-11-28 15:46:27 +01001036 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001037 /* Note: to prevent the client from expiring read timeouts
1038 * during writes, we refresh it. We only do this if the
1039 * interface is not configured for "independent streams",
1040 * because for some applications it's better not to do this,
1041 * for instance when continuously exchanging small amounts
1042 * of data which can full the socket buffers long before a
1043 * write timeout is detected.
1044 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001045 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001046 }
1047 }
1048
1049 /* in case of special condition (error, shutdown, end of write...), we
1050 * have to notify the task.
1051 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001052 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1053 ((oc->flags & CF_WAKE_WRITE) &&
1054 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreaue6300be2014-01-25 02:33:21 +01001055 si->state != SI_ST_EST)))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001056 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001057 if (!(si->flags & SI_FL_DONT_WAKE))
1058 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001059 }
Willy Tarreauf16723e2012-08-24 12:52:22 +02001060
1061 /* commit possible polling changes */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001062 cs_update_mux_polling(cs);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001063}
1064
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001065/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001066 * This is the callback which is called by the connection layer to receive data
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001067 * into the buffer from the connection. It iterates over the mux layer's
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001068 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001069 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001070static void si_cs_recv_cb(struct conn_stream *cs)
Willy Tarreauce323de2012-08-20 21:41:06 +02001071{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001072 struct connection *conn = cs->conn;
1073 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001074 struct channel *ic = si_ic(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001075 int ret, max, cur_read;
1076 int read_poll = MAX_READ_POLL_LOOPS;
1077
1078 /* stop immediately on errors. Note that we DON'T want to stop on
1079 * POLL_ERR, as the poller might report a write error while there
1080 * are still data available in the recv buffer. This typically
1081 * happens when we send too large a request to a backend server
1082 * which rejects it before reading it all.
1083 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001084 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001085 return;
Willy Tarreauce323de2012-08-20 21:41:06 +02001086
Willy Tarreauce323de2012-08-20 21:41:06 +02001087 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001088 if (ic->flags & CF_SHUTR)
Willy Tarreauce323de2012-08-20 21:41:06 +02001089 return;
1090
Willy Tarreau54e917c2017-08-30 07:35:35 +02001091 /* stop here if we reached the end of data */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001092 if (cs->flags & CS_FL_EOS)
Willy Tarreau54e917c2017-08-30 07:35:35 +02001093 goto out_shutdown_r;
1094
Willy Tarreau96199b12012-08-24 00:46:52 +02001095 cur_read = 0;
Willy Tarreau96199b12012-08-24 00:46:52 +02001096
Willy Tarreauafc8a222014-11-28 15:46:27 +01001097 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !ic->buf->o &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001098 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001099 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001100 /* The buffer was empty and nothing was transferred for more
1101 * than one second. This was caused by a pause and not by
1102 * congestion. Reset any streaming mode to reduce latency.
1103 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001104 ic->xfer_small = 0;
1105 ic->xfer_large = 0;
1106 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001107 }
1108
Willy Tarreau96199b12012-08-24 00:46:52 +02001109 /* First, let's see if we may splice data across the channel without
1110 * using a buffer.
1111 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001112 if (conn->xprt->rcv_pipe && conn->mux->rcv_pipe &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001113 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1114 ic->flags & CF_KERN_SPLICING) {
1115 if (buffer_not_empty(ic->buf)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001116 /* We're embarrassed, there are already data pending in
1117 * the buffer and we don't want to have them at two
1118 * locations at a time. Let's indicate we need some
1119 * place and ask the consumer to hurry.
1120 */
1121 goto abort_splice;
1122 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001123
Willy Tarreauafc8a222014-11-28 15:46:27 +01001124 if (unlikely(ic->pipe == NULL)) {
1125 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1126 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001127 goto abort_splice;
1128 }
1129 }
1130
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001131 ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001132 if (ret < 0) {
1133 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001134 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001135 goto abort_splice;
1136 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001137
Willy Tarreau96199b12012-08-24 00:46:52 +02001138 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001139 if (ic->to_forward != CHN_INFINITE_FORWARD)
1140 ic->to_forward -= ret;
1141 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001142 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001143 ic->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +02001144 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001145
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001146 if (cs->flags & CS_FL_EOS)
Willy Tarreau96199b12012-08-24 00:46:52 +02001147 goto out_shutdown_r;
1148
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001149 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001150 return;
Willy Tarreau96199b12012-08-24 00:46:52 +02001151
Willy Tarreau61d39a02013-07-18 21:49:32 +02001152 if (conn->flags & CO_FL_WAIT_ROOM) {
1153 /* the pipe is full or we have read enough data that it
1154 * could soon be full. Let's stop before needing to poll.
1155 */
Willy Tarreau56a77e52012-09-02 18:34:44 +02001156 si->flags |= SI_FL_WAIT_ROOM;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001157 __cs_stop_recv(cs);
Willy Tarreau61d39a02013-07-18 21:49:32 +02001158 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001159
Willy Tarreauce323de2012-08-20 21:41:06 +02001160 /* splice not possible (anymore), let's go on on standard copy */
1161 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001162
1163 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001164 if (ic->pipe && unlikely(!ic->pipe->data)) {
1165 put_pipe(ic->pipe);
1166 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001167 }
1168
Christopher Fauleta73e59b2016-12-09 17:30:18 +01001169 /* now we'll need a input buffer for the stream */
1170 if (!channel_alloc_buffer(ic, &(si_strm(si)->buffer_wait))) {
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001171 si->flags |= SI_FL_WAIT_ROOM;
1172 goto end_recv;
1173 }
1174
Willy Tarreau61d39a02013-07-18 21:49:32 +02001175 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1176 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1177 * that if such an event is not handled above in splice, it will be handled here by
1178 * recv().
1179 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001180 while (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE)) &&
Willy Tarreaub78b80e2017-12-12 09:58:40 +01001181 !(cs->flags & (CS_FL_ERROR|CS_FL_EOS)) && !(ic->flags & CF_SHUTR)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001182 max = channel_recv_max(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001183
1184 if (!max) {
Willy Tarreau56a77e52012-09-02 18:34:44 +02001185 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreauce323de2012-08-20 21:41:06 +02001186 break;
1187 }
1188
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001189 ret = conn->mux->rcv_buf(cs, ic->buf, max);
Willy Tarreau6577b482017-12-10 21:19:33 +01001190 if (cs->flags & CS_FL_RCV_MORE)
1191 si->flags |= SI_FL_WAIT_ROOM;
1192
Willy Tarreauce323de2012-08-20 21:41:06 +02001193 if (ret <= 0)
1194 break;
1195
1196 cur_read += ret;
1197
1198 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001199 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001200 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001201 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1202 if (fwd > ic->to_forward)
1203 fwd = ic->to_forward;
1204 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001205 }
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001206 c_adv(ic, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001207 }
1208
Willy Tarreauafc8a222014-11-28 15:46:27 +01001209 ic->flags |= CF_READ_PARTIAL;
1210 ic->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001211
Willy Tarreauafc8a222014-11-28 15:46:27 +01001212 if (!channel_may_recv(ic)) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001213 si->flags |= SI_FL_WAIT_ROOM;
1214 break;
1215 }
1216
Willy Tarreauafc8a222014-11-28 15:46:27 +01001217 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001218 /*
1219 * This used to be __conn_xprt_done_recv()
1220 * This was changed to accomodate with the mux code,
1221 * but we may have lost a worthwhile optimization.
1222 */
1223 __cs_stop_recv(cs);
Willy Tarreau62dd6982017-11-18 11:26:20 +01001224 si->flags |= SI_FL_WAIT_ROOM;
1225 break;
Willy Tarreau5fddab02012-11-09 18:27:26 +01001226 }
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)) &&
1250 (cur_read <= ic->buf->size / 2)) {
1251 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) &&
1269 (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)
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001289 return;
1290
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
1295 return;
1296
1297 out_shutdown_r:
1298 /* we received a shutdown */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001299 ic->flags |= CF_READ_NULL;
1300 if (ic->flags & CF_AUTO_CLOSE)
1301 channel_shutw_now(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001302 stream_sock_read0(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001303 return;
Willy Tarreauce323de2012-08-20 21:41:06 +02001304}
1305
1306/*
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001307 * This is the callback which is called by the connection layer to send data
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001308 * from the buffer to the connection. It iterates over the transport layer's
1309 * snd_buf function.
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001310 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001311static void si_cs_send_cb(struct conn_stream *cs)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001312{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001313 struct connection *conn = cs->conn;
1314 struct stream_interface *si = cs->data;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001315
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001316 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001317 return;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001318
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001319 if (conn->flags & CO_FL_HANDSHAKE)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001320 /* a handshake was requested */
1321 return;
1322
1323 /* we might have been called just after an asynchronous shutw */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001324 if (si_oc(si)->flags & CF_SHUTW)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001325 return;
1326
1327 /* OK there are data waiting to be sent */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001328 si_cs_send(cs);
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001329
1330 /* OK all done */
1331 return;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001332}
1333
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001334/*
1335 * This function propagates a null read received on a socket-based connection.
1336 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001337 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001338 */
1339void stream_sock_read0(struct stream_interface *si)
1340{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001341 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001342 struct channel *ic = si_ic(si);
1343 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001344
Willy Tarreauafc8a222014-11-28 15:46:27 +01001345 ic->flags &= ~CF_SHUTR_NOW;
1346 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001347 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001348 ic->flags |= CF_SHUTR;
1349 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001350 si->flags &= ~SI_FL_WAIT_ROOM;
1351
1352 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1353 return;
1354
Willy Tarreauafc8a222014-11-28 15:46:27 +01001355 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001356 goto do_close;
1357
1358 if (si->flags & SI_FL_NOHALF) {
1359 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001360 /* force flag on ssl to keep stream in cache */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001361 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001362 goto do_close;
1363 }
1364
1365 /* otherwise that's just a normal read shutdown */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001366 __cs_stop_recv(cs);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001367 return;
1368
1369 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001370 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaua553ae92017-10-05 18:52:17 +02001371 cs_close(cs);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001372
Willy Tarreauafc8a222014-11-28 15:46:27 +01001373 oc->flags &= ~CF_SHUTW_NOW;
1374 oc->flags |= CF_SHUTW;
1375 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001376
1377 si->flags &= ~(SI_FL_WAIT_DATA | SI_FL_WAIT_ROOM);
1378
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001379 si->state = SI_ST_DIS;
1380 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001381 return;
1382}
1383
Willy Tarreau651e1822015-09-23 20:06:13 +02001384/* Callback to be used by applet handlers upon completion. It updates the stream
1385 * (which may or may not take this opportunity to try to forward data), then
Emeric Brun2802b072017-06-30 14:11:56 +02001386 * may re-enable the applet's based on the channels and stream interface's final
Willy Tarreau651e1822015-09-23 20:06:13 +02001387 * states.
1388 */
Willy Tarreauaa977ba2015-09-25 11:45:06 +02001389void si_applet_wake_cb(struct stream_interface *si)
Willy Tarreaue5f86492015-04-19 15:16:35 +02001390{
Willy Tarreaueca572f2015-09-25 19:11:55 +02001391 struct channel *ic = si_ic(si);
1392
1393 /* If the applet wants to write and the channel is closed, it's a
1394 * broken pipe and it must be reported.
1395 */
1396 if ((si->flags & SI_FL_WANT_PUT) && (ic->flags & CF_SHUTR))
1397 si->flags |= SI_FL_ERR;
1398
Willy Tarreau651e1822015-09-23 20:06:13 +02001399 /* update the stream-int, channels, and possibly wake the stream up */
1400 stream_int_notify(si);
Willy Tarreaue5f86492015-04-19 15:16:35 +02001401
Emeric Brun2802b072017-06-30 14:11:56 +02001402 /* stream_int_notify may pass throught checksnd and released some
1403 * WAIT_ROOM flags. The process_stream will consider those flags
1404 * to wakeup the appctx but in the case the task is not in runqueue
1405 * we may have to wakeup the appctx immediately.
1406 */
1407 if (!task_in_rq(si_task(si)))
1408 stream_int_update_applet(si);
1409}
Willy Tarreau452c7d52015-09-25 10:39:16 +02001410
1411/* Updates the activity status of an applet outside of the applet handler based
1412 * on the channel's flags and the stream interface's flags. It needs to be
1413 * called once after the channels' flags have settled down and the stream has
1414 * been updated. It is not designed to be called from within the applet handler
1415 * itself.
Willy Tarreau563cc372015-04-19 18:13:56 +02001416 */
1417void stream_int_update_applet(struct stream_interface *si)
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001418{
Willy Tarreaufe127932015-04-21 19:23:39 +02001419 if (((si->flags & (SI_FL_WANT_PUT|SI_FL_WAIT_ROOM)) == SI_FL_WANT_PUT) ||
1420 ((si->flags & (SI_FL_WANT_GET|SI_FL_WAIT_DATA)) == SI_FL_WANT_GET))
Willy Tarreau563cc372015-04-19 18:13:56 +02001421 appctx_wakeup(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001422}
1423
1424/*
1425 * This function performs a shutdown-read on a stream interface attached to an
1426 * applet in a connected or init state (it does nothing for other states). It
1427 * either shuts the read side or marks itself as closed. The buffer flags are
1428 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1429 * we also forward the close to the write side. The owner task is woken up if
1430 * it exists.
1431 */
1432static void stream_int_shutr_applet(struct stream_interface *si)
1433{
1434 struct channel *ic = si_ic(si);
1435
1436 ic->flags &= ~CF_SHUTR_NOW;
1437 if (ic->flags & CF_SHUTR)
1438 return;
1439 ic->flags |= CF_SHUTR;
1440 ic->rex = TICK_ETERNITY;
1441 si->flags &= ~SI_FL_WAIT_ROOM;
1442
Willy Tarreau828824a2015-04-19 17:20:03 +02001443 /* Note: on shutr, we don't call the applet */
1444
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001445 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1446 return;
1447
1448 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau958f0742015-09-25 20:24:26 +02001449 si_applet_release(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001450 si->state = SI_ST_DIS;
1451 si->exp = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001452 }
1453 else if (si->flags & SI_FL_NOHALF) {
1454 /* we want to immediately forward this close to the write side */
1455 return stream_int_shutw_applet(si);
1456 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001457}
1458
1459/*
1460 * This function performs a shutdown-write on a stream interface attached to an
1461 * applet in a connected or init state (it does nothing for other states). It
1462 * either shuts the write side or marks itself as closed. The buffer flags are
1463 * updated to reflect the new state. It does also close everything if the SI
1464 * was marked as being in error state. The owner task is woken up if it exists.
1465 */
1466static void stream_int_shutw_applet(struct stream_interface *si)
1467{
1468 struct channel *ic = si_ic(si);
1469 struct channel *oc = si_oc(si);
1470
1471 oc->flags &= ~CF_SHUTW_NOW;
1472 if (oc->flags & CF_SHUTW)
1473 return;
1474 oc->flags |= CF_SHUTW;
1475 oc->wex = TICK_ETERNITY;
1476 si->flags &= ~SI_FL_WAIT_DATA;
1477
Hongbo Longe39683c2017-03-10 18:41:51 +01001478 if (tick_isset(si->hcto)) {
1479 ic->rto = si->hcto;
1480 ic->rex = tick_add(now_ms, ic->rto);
1481 }
1482
Willy Tarreau828824a2015-04-19 17:20:03 +02001483 /* on shutw we always wake the applet up */
1484 appctx_wakeup(si_appctx(si));
1485
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001486 switch (si->state) {
1487 case SI_ST_EST:
1488 /* we have to shut before closing, otherwise some short messages
1489 * may never leave the system, especially when there are remaining
1490 * unread data in the socket input buffer, or when nolinger is set.
1491 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1492 * no risk so we close both sides immediately.
1493 */
1494 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1495 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1496 return;
1497
1498 /* fall through */
1499 case SI_ST_CON:
1500 case SI_ST_CER:
1501 case SI_ST_QUE:
1502 case SI_ST_TAR:
1503 /* Note that none of these states may happen with applets */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001504 si_applet_release(si);
Willy Tarreau958f0742015-09-25 20:24:26 +02001505 si->state = SI_ST_DIS;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001506 default:
1507 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
1508 ic->flags &= ~CF_SHUTR_NOW;
1509 ic->flags |= CF_SHUTR;
1510 ic->rex = TICK_ETERNITY;
1511 si->exp = TICK_ETERNITY;
1512 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001513}
1514
1515/* chk_rcv function for applets */
1516static void stream_int_chk_rcv_applet(struct stream_interface *si)
1517{
1518 struct channel *ic = si_ic(si);
1519
1520 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1521 __FUNCTION__,
1522 si, si->state, ic->flags, si_oc(si)->flags);
1523
1524 if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ))))
1525 return;
Willy Tarreau828824a2015-04-19 17:20:03 +02001526 /* here we only wake the applet up if it was waiting for some room */
1527 if (!(si->flags & SI_FL_WAIT_ROOM))
1528 return;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001529
Willy Tarreau828824a2015-04-19 17:20:03 +02001530 if (channel_may_recv(ic) && !ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001531 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001532 appctx_wakeup(si_appctx(si));
Thierry FOURNIER5bc2cbf2015-09-04 18:40:36 +02001533 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001534}
1535
1536/* chk_snd function for applets */
1537static void stream_int_chk_snd_applet(struct stream_interface *si)
1538{
1539 struct channel *oc = si_oc(si);
1540
1541 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1542 __FUNCTION__,
1543 si, si->state, si_ic(si)->flags, oc->flags);
1544
1545 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1546 return;
1547
Willy Tarreau828824a2015-04-19 17:20:03 +02001548 /* we only wake the applet up if it was waiting for some data */
1549
1550 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001551 return;
1552
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001553 if (!tick_isset(oc->wex))
1554 oc->wex = tick_add_ifset(now_ms, oc->wto);
1555
Willy Tarreau828824a2015-04-19 17:20:03 +02001556 if (!channel_is_empty(oc)) {
1557 /* (re)start sending */
1558 appctx_wakeup(si_appctx(si));
1559 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001560}
1561
Willy Tarreaudded32d2008-11-30 19:48:07 +01001562/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001563 * Local variables:
1564 * c-indent-level: 8
1565 * c-basic-offset: 8
1566 * End:
1567 */