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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 */
587 if ((conn->flags & (CO_FL_EARLY_DATA | CO_FL_EARLY_SSL_HS)) == CO_FL_EARLY_DATA) {
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 Tarreau651e1822015-09-23 20:06:13 +0200604 /* Third step : update the connection's polling status based on what
605 * was done above (eg: maybe some buffers got emptied).
606 */
607 if (channel_is_empty(oc))
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200608 __cs_stop_send(cs);
Willy Tarreauea3cc482015-09-23 19:37:00 +0200609
Willy Tarreaufd31e532012-07-23 18:24:25 +0200610
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200611 if (si->flags & SI_FL_WAIT_ROOM) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200612 __cs_stop_recv(cs);
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200613 }
Willy Tarreauafc8a222014-11-28 15:46:27 +0100614 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL &&
615 channel_may_recv(ic)) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200616 __cs_want_recv(cs);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200617 }
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200618 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200619}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200620
Willy Tarreau5368d802012-08-21 18:22:06 +0200621/*
622 * This function is called to send buffer data to a stream socket.
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200623 * It calls the mux layer's snd_buf function. It relies on the
Godbach4f489902013-12-04 17:24:06 +0800624 * caller to commit polling changes. The caller should check conn->flags
625 * for errors.
Willy Tarreau5368d802012-08-21 18:22:06 +0200626 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200627static void si_cs_send(struct conn_stream *cs)
Willy Tarreau5368d802012-08-21 18:22:06 +0200628{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200629 struct connection *conn = cs->conn;
630 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100631 struct channel *oc = si_oc(si);
Willy Tarreau5368d802012-08-21 18:22:06 +0200632 int ret;
633
Bin Wang95fad5b2017-09-15 14:56:40 +0800634 /* ensure it's only set if a write attempt has succeeded */
635 oc->flags &= ~CF_WRITE_PARTIAL;
636
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200637 if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) {
638 ret = conn->mux->snd_pipe(cs, oc->pipe);
Willy Tarreau96199b12012-08-24 00:46:52 +0200639 if (ret > 0)
Christopher Fauletc5a9d5b2017-11-09 09:36:43 +0100640 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA | CF_WRITE_EVENT;
Willy Tarreau5368d802012-08-21 18:22:06 +0200641
Willy Tarreauafc8a222014-11-28 15:46:27 +0100642 if (!oc->pipe->data) {
643 put_pipe(oc->pipe);
644 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200645 }
646
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200647 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +0800648 return;
Willy Tarreau5368d802012-08-21 18:22:06 +0200649 }
650
651 /* At this point, the pipe is empty, but we may still have data pending
652 * in the normal buffer.
653 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100654 if (!oc->buf->o)
Godbach4f489902013-12-04 17:24:06 +0800655 return;
Willy Tarreau5368d802012-08-21 18:22:06 +0200656
Godbache68e02d2013-10-11 15:48:29 +0800657 /* when we're here, we already know that there is no spliced
Willy Tarreau5368d802012-08-21 18:22:06 +0200658 * data left, and that there are sendable buffered data.
659 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200660 if (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_HANDSHAKE)) &&
661 !(cs->flags & CS_FL_ERROR) && !(oc->flags & CF_SHUTW)) {
Willy Tarreau5368d802012-08-21 18:22:06 +0200662 /* check if we want to inform the kernel that we're interested in
663 * sending more data after this call. We want this if :
664 * - we're about to close after this last send and want to merge
665 * the ongoing FIN with the last segment.
666 * - we know we can't send everything at once and must get back
667 * here because of unaligned data
668 * - there is still a finite amount of data to forward
669 * The test is arranged so that the most common case does only 2
670 * tests.
671 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100672 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200673
Willy Tarreauafc8a222014-11-28 15:46:27 +0100674 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
675 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
Willy Tarreau4ac49282017-10-17 16:33:46 +0200676 (oc->flags & CF_EXPECT_MORE))) ||
Willy Tarreauecd2e152017-11-07 15:07:25 +0100677 ((oc->flags & CF_ISRESP) &&
678 ((oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW)) == (CF_AUTO_CLOSE|CF_SHUTW_NOW))))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100679 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200680
Willy Tarreauafc8a222014-11-28 15:46:27 +0100681 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100682 send_flag |= CO_SFL_STREAMER;
683
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200684 ret = conn->mux->snd_buf(cs, oc->buf, send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800685 if (ret > 0) {
Christopher Fauletc5a9d5b2017-11-09 09:36:43 +0100686 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA | CF_WRITE_EVENT;
Willy Tarreau5368d802012-08-21 18:22:06 +0200687
Willy Tarreauafc8a222014-11-28 15:46:27 +0100688 if (!oc->buf->o) {
Godbache68e02d2013-10-11 15:48:29 +0800689 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100690 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800691 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200692
Godbache68e02d2013-10-11 15:48:29 +0800693 /* if some data remain in the buffer, it's only because the
694 * system buffers are full, we will try next time.
695 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200696 }
Godbache68e02d2013-10-11 15:48:29 +0800697 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200698}
699
Willy Tarreau25f13102015-09-24 11:32:22 +0200700/* This function is designed to be called from within the stream handler to
701 * update the channels' expiration timers and the stream interface's flags
702 * based on the channels' flags. It needs to be called only once after the
703 * channels' flags have settled down, and before they are cleared, though it
704 * doesn't harm to call it as often as desired (it just slightly hurts
705 * performance). It must not be called from outside of the stream handler,
706 * as what it does will be used to compute the stream task's expiration.
707 */
708void stream_int_update(struct stream_interface *si)
709{
710 struct channel *ic = si_ic(si);
711 struct channel *oc = si_oc(si);
712
713 if (!(ic->flags & CF_SHUTR)) {
714 /* Read not closed, update FD status and timeout for reads */
715 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
716 /* stop reading */
717 if (!(si->flags & SI_FL_WAIT_ROOM)) {
718 if (!(ic->flags & CF_DONT_READ)) /* full */
719 si->flags |= SI_FL_WAIT_ROOM;
720 ic->rex = TICK_ETERNITY;
721 }
722 }
723 else {
724 /* (re)start reading and update timeout. Note: we don't recompute the timeout
725 * everytime we get here, otherwise it would risk never to expire. We only
726 * update it if is was not yet set. The stream socket handler will already
727 * have updated it if there has been a completed I/O.
728 */
729 si->flags &= ~SI_FL_WAIT_ROOM;
730 if (!(ic->flags & (CF_READ_NOEXP|CF_DONT_READ)) && !tick_isset(ic->rex))
731 ic->rex = tick_add_ifset(now_ms, ic->rto);
732 }
733 }
734
735 if (!(oc->flags & CF_SHUTW)) {
736 /* Write not closed, update FD status and timeout for writes */
737 if (channel_is_empty(oc)) {
738 /* stop writing */
739 if (!(si->flags & SI_FL_WAIT_DATA)) {
740 if ((oc->flags & CF_SHUTW_NOW) == 0)
741 si->flags |= SI_FL_WAIT_DATA;
742 oc->wex = TICK_ETERNITY;
743 }
744 }
745 else {
746 /* (re)start writing and update timeout. Note: we don't recompute the timeout
747 * everytime we get here, otherwise it would risk never to expire. We only
748 * update it if is was not yet set. The stream socket handler will already
749 * have updated it if there has been a completed I/O.
750 */
751 si->flags &= ~SI_FL_WAIT_DATA;
752 if (!tick_isset(oc->wex)) {
753 oc->wex = tick_add_ifset(now_ms, oc->wto);
754 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
755 /* Note: depending on the protocol, we don't know if we're waiting
756 * for incoming data or not. So in order to prevent the socket from
757 * expiring read timeouts during writes, we refresh the read timeout,
758 * except if it was already infinite or if we have explicitly setup
759 * independent streams.
760 */
761 ic->rex = tick_add_ifset(now_ms, ic->rto);
762 }
763 }
764 }
765 }
766}
767
Willy Tarreau452c7d52015-09-25 10:39:16 +0200768/* Updates the polling status of a connection outside of the connection handler
769 * based on the channel's flags and the stream interface's flags. It needs to be
770 * called once after the channels' flags have settled down and the stream has
771 * been updated. It is not designed to be called from within the connection
772 * handler itself.
Willy Tarreau100c4672012-08-20 12:06:26 +0200773 */
774void stream_int_update_conn(struct stream_interface *si)
775{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100776 struct channel *ic = si_ic(si);
777 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200778 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreau100c4672012-08-20 12:06:26 +0200779
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200780 if (!(ic->flags & CF_SHUTR)) {
781 /* Read not closed */
782 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic))
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200783 __cs_stop_recv(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200784 else
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200785 __cs_want_recv(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200786 }
787
788 if (!(oc->flags & CF_SHUTW)) {
789 /* Write not closed */
790 if (channel_is_empty(oc))
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200791 __cs_stop_send(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200792 else
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200793 __cs_want_send(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200794 }
795
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200796 cs_update_mux_polling(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200797}
798
799/*
800 * This function performs a shutdown-read on a stream interface attached to
801 * a connection in a connected or init state (it does nothing for other
802 * states). It either shuts the read side or marks itself as closed. The buffer
803 * flags are updated to reflect the new state. If the stream interface has
804 * SI_FL_NOHALF, we also forward the close to the write side. If a control
805 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +0200806 * descriptors are then shutdown or closed accordingly. The function
807 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200808 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200809static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200810{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200811 struct conn_stream *cs = __objt_cs(si->end);
812 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100813 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200814
Willy Tarreauafc8a222014-11-28 15:46:27 +0100815 ic->flags &= ~CF_SHUTR_NOW;
816 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200817 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100818 ic->flags |= CF_SHUTR;
819 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200820 si->flags &= ~SI_FL_WAIT_ROOM;
821
822 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200823 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200824
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100825 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaua553ae92017-10-05 18:52:17 +0200826 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200827 si->state = SI_ST_DIS;
828 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200829 }
830 else if (si->flags & SI_FL_NOHALF) {
831 /* we want to immediately forward this close to the write side */
832 return stream_int_shutw_conn(si);
833 }
834 else if (conn->ctrl) {
835 /* we want the caller to disable polling on this FD */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200836 cs_stop_recv(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200837 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200838}
839
840/*
841 * This function performs a shutdown-write on a stream interface attached to
842 * a connection in a connected or init state (it does nothing for other
843 * states). It either shuts the write side or marks itself as closed. The
844 * buffer flags are updated to reflect the new state. It does also close
845 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +0100846 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200847 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200848static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200849{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200850 struct conn_stream *cs = __objt_cs(si->end);
851 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100852 struct channel *ic = si_ic(si);
853 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200854
Willy Tarreauafc8a222014-11-28 15:46:27 +0100855 oc->flags &= ~CF_SHUTW_NOW;
856 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200857 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100858 oc->flags |= CF_SHUTW;
859 oc->wex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200860 si->flags &= ~SI_FL_WAIT_DATA;
861
Hongbo Longe39683c2017-03-10 18:41:51 +0100862 if (tick_isset(si->hcto)) {
863 ic->rto = si->hcto;
864 ic->rex = tick_add(now_ms, ic->rto);
865 }
866
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200867 switch (si->state) {
868 case SI_ST_EST:
869 /* we have to shut before closing, otherwise some short messages
870 * may never leave the system, especially when there are remaining
871 * unread data in the socket input buffer, or when nolinger is set.
872 * However, if SI_FL_NOLINGER is explicitly set, we know there is
873 * no risk so we close both sides immediately.
874 */
875 if (si->flags & SI_FL_ERR) {
876 /* quick close, the socket is alredy shut anyway */
877 }
878 else if (si->flags & SI_FL_NOLINGER) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200879 /* unclean data-layer shutdown, typically an aborted request
880 * or a forwarded shutdown from a client to a server due to
881 * option abortonclose. No need for the TLS layer to try to
882 * emit a shutdown message.
883 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200884 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200885 }
886 else {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200887 /* clean data-layer shutdown. This only happens on the
888 * frontend side, or on the backend side when forwarding
889 * a client close in TCP mode or in HTTP TUNNEL mode
890 * while option abortonclose is set. We want the TLS
891 * layer to try to signal it to the peer before we close.
892 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200893 cs_shutw(cs, CS_SHW_NORMAL);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200894
Willy Tarreaua553ae92017-10-05 18:52:17 +0200895 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
896 /* OK just a shutw, but we want the caller
897 * to disable polling on this FD if exists.
898 */
899 conn_cond_update_polling(conn);
900 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200901 }
902 }
903
904 /* fall through */
905 case SI_ST_CON:
906 /* we may have to close a pending connection, and mark the
907 * response buffer as shutr
908 */
Willy Tarreaua553ae92017-10-05 18:52:17 +0200909 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200910 /* fall through */
911 case SI_ST_CER:
912 case SI_ST_QUE:
913 case SI_ST_TAR:
914 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +0200915 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200916 default:
917 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100918 ic->flags &= ~CF_SHUTR_NOW;
919 ic->flags |= CF_SHUTR;
920 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200921 si->exp = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +0200922 }
923}
924
Willy Tarreau46a8d922012-08-20 12:38:36 +0200925/* This function is used for inter-stream-interface calls. It is called by the
926 * consumer to inform the producer side that it may be interested in checking
927 * for free space in the buffer. Note that it intentionally does not update
928 * timeouts, so that we can still check them later at wake-up. This function is
929 * dedicated to connection-based stream interfaces.
930 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200931static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +0200932{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100933 struct channel *ic = si_ic(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200934 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200935
Willy Tarreauafc8a222014-11-28 15:46:27 +0100936 if (unlikely(si->state > SI_ST_EST || (ic->flags & CF_SHUTR)))
Willy Tarreau46a8d922012-08-20 12:38:36 +0200937 return;
938
Willy Tarreauafc8a222014-11-28 15:46:27 +0100939 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
Willy Tarreau46a8d922012-08-20 12:38:36 +0200940 /* stop reading */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100941 if (!(ic->flags & CF_DONT_READ)) /* full */
Willy Tarreau46a8d922012-08-20 12:38:36 +0200942 si->flags |= SI_FL_WAIT_ROOM;
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200943 __cs_stop_recv(cs);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200944 }
945 else {
946 /* (re)start reading */
947 si->flags &= ~SI_FL_WAIT_ROOM;
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200948 __cs_want_recv(cs);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200949 }
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200950 cs_update_mux_polling(cs);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200951}
952
953
Willy Tarreaude5722c2012-08-20 15:01:10 +0200954/* This function is used for inter-stream-interface calls. It is called by the
955 * producer to inform the consumer side that it may be interested in checking
956 * for data in the buffer. Note that it intentionally does not update timeouts,
957 * so that we can still check them later at wake-up.
958 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200959static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +0200960{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100961 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200962 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +0200963
Bin Wang95fad5b2017-09-15 14:56:40 +0800964 /* ensure it's only set if a write attempt has succeeded */
965 oc->flags &= ~CF_WRITE_PARTIAL;
966
Willy Tarreauafc8a222014-11-28 15:46:27 +0100967 if (unlikely(si->state > SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +0200968 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +0200969
Willy Tarreauafc8a222014-11-28 15:46:27 +0100970 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +0200971 return;
972
Willy Tarreauafc8a222014-11-28 15:46:27 +0100973 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +0100974 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +0200975 return;
976
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200977 if (cs->flags & CS_FL_DATA_WR_ENA) {
Willy Tarreau5007d2a2013-07-18 22:09:48 +0200978 /* already subscribed to write notifications, will be called
979 * anyway, so let's avoid calling it especially if the reader
980 * is not ready.
981 */
982 return;
983 }
984
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200985 __cs_want_send(cs);
Willy Tarreaud29a0662012-12-10 16:33:38 +0100986
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200987 si_cs_send(cs);
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200988 if (cs->flags & CS_FL_ERROR || cs->conn->flags & CO_FL_ERROR) {
Willy Tarreau3b9c8502017-10-25 14:22:28 +0200989 /* Write error on the file descriptor */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200990 __cs_stop_both(cs);
Willy Tarreau3b9c8502017-10-25 14:22:28 +0200991 si->flags |= SI_FL_ERR;
992 goto out_wakeup;
Willy Tarreaude5722c2012-08-20 15:01:10 +0200993 }
994
995 /* OK, so now we know that some data might have been sent, and that we may
996 * have to poll first. We have to do that too if the buffer is not empty.
997 */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100998 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +0200999 /* the connection is established but we can't write. Either the
1000 * buffer is empty, or we just refrain from sending because the
1001 * ->o limit was reached. Maybe we just wrote the last
1002 * chunk and need to close.
1003 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001004 __cs_stop_send(cs);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001005 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001006 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreaude5722c2012-08-20 15:01:10 +02001007 (si->state == SI_ST_EST)) {
1008 si_shutw(si);
1009 goto out_wakeup;
1010 }
1011
Willy Tarreauafc8a222014-11-28 15:46:27 +01001012 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001013 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001014 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001015 }
1016 else {
1017 /* Otherwise there are remaining data to be sent in the buffer,
1018 * which means we have to poll before doing so.
1019 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001020 __cs_want_send(cs);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001021 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001022 if (!tick_isset(oc->wex))
1023 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001024 }
1025
Willy Tarreauafc8a222014-11-28 15:46:27 +01001026 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1027 struct channel *ic = si_ic(si);
1028
Willy Tarreaude5722c2012-08-20 15:01:10 +02001029 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001030 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1031 !channel_is_empty(oc))
1032 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001033
Willy Tarreauafc8a222014-11-28 15:46:27 +01001034 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001035 /* Note: to prevent the client from expiring read timeouts
1036 * during writes, we refresh it. We only do this if the
1037 * interface is not configured for "independent streams",
1038 * because for some applications it's better not to do this,
1039 * for instance when continuously exchanging small amounts
1040 * of data which can full the socket buffers long before a
1041 * write timeout is detected.
1042 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001043 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001044 }
1045 }
1046
1047 /* in case of special condition (error, shutdown, end of write...), we
1048 * have to notify the task.
1049 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001050 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1051 ((oc->flags & CF_WAKE_WRITE) &&
1052 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreaue6300be2014-01-25 02:33:21 +01001053 si->state != SI_ST_EST)))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001054 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001055 if (!(si->flags & SI_FL_DONT_WAKE))
1056 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001057 }
Willy Tarreauf16723e2012-08-24 12:52:22 +02001058
1059 /* commit possible polling changes */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001060 cs_update_mux_polling(cs);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001061}
1062
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001063/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001064 * This is the callback which is called by the connection layer to receive data
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001065 * into the buffer from the connection. It iterates over the mux layer's
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001066 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001067 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001068static void si_cs_recv_cb(struct conn_stream *cs)
Willy Tarreauce323de2012-08-20 21:41:06 +02001069{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001070 struct connection *conn = cs->conn;
1071 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001072 struct channel *ic = si_ic(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001073 int ret, max, cur_read;
1074 int read_poll = MAX_READ_POLL_LOOPS;
1075
1076 /* stop immediately on errors. Note that we DON'T want to stop on
1077 * POLL_ERR, as the poller might report a write error while there
1078 * are still data available in the recv buffer. This typically
1079 * happens when we send too large a request to a backend server
1080 * which rejects it before reading it all.
1081 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001082 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001083 return;
Willy Tarreauce323de2012-08-20 21:41:06 +02001084
Willy Tarreauce323de2012-08-20 21:41:06 +02001085 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001086 if (ic->flags & CF_SHUTR)
Willy Tarreauce323de2012-08-20 21:41:06 +02001087 return;
1088
Willy Tarreau54e917c2017-08-30 07:35:35 +02001089 /* stop here if we reached the end of data */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001090 if (cs->flags & CS_FL_EOS)
Willy Tarreau54e917c2017-08-30 07:35:35 +02001091 goto out_shutdown_r;
1092
Willy Tarreau96199b12012-08-24 00:46:52 +02001093 cur_read = 0;
Willy Tarreau96199b12012-08-24 00:46:52 +02001094
Willy Tarreauafc8a222014-11-28 15:46:27 +01001095 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !ic->buf->o &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001096 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001097 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001098 /* The buffer was empty and nothing was transferred for more
1099 * than one second. This was caused by a pause and not by
1100 * congestion. Reset any streaming mode to reduce latency.
1101 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001102 ic->xfer_small = 0;
1103 ic->xfer_large = 0;
1104 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001105 }
1106
Willy Tarreau96199b12012-08-24 00:46:52 +02001107 /* First, let's see if we may splice data across the channel without
1108 * using a buffer.
1109 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001110 if (conn->xprt->rcv_pipe && conn->mux->rcv_pipe &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001111 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1112 ic->flags & CF_KERN_SPLICING) {
1113 if (buffer_not_empty(ic->buf)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001114 /* We're embarrassed, there are already data pending in
1115 * the buffer and we don't want to have them at two
1116 * locations at a time. Let's indicate we need some
1117 * place and ask the consumer to hurry.
1118 */
1119 goto abort_splice;
1120 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001121
Willy Tarreauafc8a222014-11-28 15:46:27 +01001122 if (unlikely(ic->pipe == NULL)) {
1123 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1124 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001125 goto abort_splice;
1126 }
1127 }
1128
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001129 ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001130 if (ret < 0) {
1131 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001132 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001133 goto abort_splice;
1134 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001135
Willy Tarreau96199b12012-08-24 00:46:52 +02001136 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001137 if (ic->to_forward != CHN_INFINITE_FORWARD)
1138 ic->to_forward -= ret;
1139 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001140 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001141 ic->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +02001142 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001143
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001144 if (cs->flags & CS_FL_EOS)
Willy Tarreau96199b12012-08-24 00:46:52 +02001145 goto out_shutdown_r;
1146
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001147 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001148 return;
Willy Tarreau96199b12012-08-24 00:46:52 +02001149
Willy Tarreau61d39a02013-07-18 21:49:32 +02001150 if (conn->flags & CO_FL_WAIT_ROOM) {
1151 /* the pipe is full or we have read enough data that it
1152 * could soon be full. Let's stop before needing to poll.
1153 */
Willy Tarreau56a77e52012-09-02 18:34:44 +02001154 si->flags |= SI_FL_WAIT_ROOM;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001155 __cs_stop_recv(cs);
Willy Tarreau61d39a02013-07-18 21:49:32 +02001156 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001157
Willy Tarreauce323de2012-08-20 21:41:06 +02001158 /* splice not possible (anymore), let's go on on standard copy */
1159 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001160
1161 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001162 if (ic->pipe && unlikely(!ic->pipe->data)) {
1163 put_pipe(ic->pipe);
1164 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001165 }
1166
Christopher Fauleta73e59b2016-12-09 17:30:18 +01001167 /* now we'll need a input buffer for the stream */
1168 if (!channel_alloc_buffer(ic, &(si_strm(si)->buffer_wait))) {
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001169 si->flags |= SI_FL_WAIT_ROOM;
1170 goto end_recv;
1171 }
1172
Willy Tarreau61d39a02013-07-18 21:49:32 +02001173 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1174 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1175 * that if such an event is not handled above in splice, it will be handled here by
1176 * recv().
1177 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001178 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 +01001179 !(cs->flags & (CS_FL_ERROR|CS_FL_EOS)) && !(ic->flags & CF_SHUTR)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001180 max = channel_recv_max(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001181
1182 if (!max) {
Willy Tarreau56a77e52012-09-02 18:34:44 +02001183 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreauce323de2012-08-20 21:41:06 +02001184 break;
1185 }
1186
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001187 ret = conn->mux->rcv_buf(cs, ic->buf, max);
Willy Tarreau6577b482017-12-10 21:19:33 +01001188 if (cs->flags & CS_FL_RCV_MORE)
1189 si->flags |= SI_FL_WAIT_ROOM;
1190
Willy Tarreauce323de2012-08-20 21:41:06 +02001191 if (ret <= 0)
1192 break;
1193
1194 cur_read += ret;
1195
1196 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001197 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001198 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001199 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1200 if (fwd > ic->to_forward)
1201 fwd = ic->to_forward;
1202 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001203 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001204 b_adv(ic->buf, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001205 }
1206
Willy Tarreauafc8a222014-11-28 15:46:27 +01001207 ic->flags |= CF_READ_PARTIAL;
1208 ic->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001209
Willy Tarreauafc8a222014-11-28 15:46:27 +01001210 if (!channel_may_recv(ic)) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001211 si->flags |= SI_FL_WAIT_ROOM;
1212 break;
1213 }
1214
Willy Tarreauafc8a222014-11-28 15:46:27 +01001215 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001216 /*
1217 * This used to be __conn_xprt_done_recv()
1218 * This was changed to accomodate with the mux code,
1219 * but we may have lost a worthwhile optimization.
1220 */
1221 __cs_stop_recv(cs);
Willy Tarreau62dd6982017-11-18 11:26:20 +01001222 si->flags |= SI_FL_WAIT_ROOM;
1223 break;
Willy Tarreau5fddab02012-11-09 18:27:26 +01001224 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001225
1226 /* if too many bytes were missing from last read, it means that
1227 * it's pointless trying to read again because the system does
1228 * not have them in buffers.
1229 */
1230 if (ret < max) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001231 /* if a streamer has read few data, it may be because we
1232 * have exhausted system buffers. It's not worth trying
1233 * again.
1234 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001235 if (ic->flags & CF_STREAMER)
Willy Tarreauce323de2012-08-20 21:41:06 +02001236 break;
1237
1238 /* if we read a large block smaller than what we requested,
1239 * it's almost certain we'll never get anything more.
1240 */
1241 if (ret >= global.tune.recv_enough)
1242 break;
1243 }
1244 } /* while !flags */
1245
Willy Tarreauc5890e62014-02-09 17:47:01 +01001246 if (cur_read) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001247 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
1248 (cur_read <= ic->buf->size / 2)) {
1249 ic->xfer_large = 0;
1250 ic->xfer_small++;
1251 if (ic->xfer_small >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001252 /* we have read less than half of the buffer in
1253 * one pass, and this happened at least 3 times.
1254 * This is definitely not a streamer.
1255 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001256 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001257 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001258 else if (ic->xfer_small >= 2) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001259 /* if the buffer has been at least half full twice,
1260 * we receive faster than we send, so at least it
1261 * is not a "fast streamer".
1262 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001263 ic->flags &= ~CF_STREAMER_FAST;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001264 }
1265 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001266 else if (!(ic->flags & CF_STREAMER_FAST) &&
1267 (cur_read >= ic->buf->size - global.tune.maxrewrite)) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001268 /* we read a full buffer at once */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001269 ic->xfer_small = 0;
1270 ic->xfer_large++;
1271 if (ic->xfer_large >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001272 /* we call this buffer a fast streamer if it manages
1273 * to be filled in one call 3 consecutive times.
1274 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001275 ic->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001276 }
1277 }
1278 else {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001279 ic->xfer_small = 0;
1280 ic->xfer_large = 0;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001281 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001282 ic->last_read = now_ms;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001283 }
1284
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001285 end_recv:
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001286 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001287 return;
1288
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001289 if (cs->flags & CS_FL_EOS)
Willy Tarreauce323de2012-08-20 21:41:06 +02001290 /* connection closed */
1291 goto out_shutdown_r;
1292
1293 return;
1294
1295 out_shutdown_r:
1296 /* we received a shutdown */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001297 ic->flags |= CF_READ_NULL;
1298 if (ic->flags & CF_AUTO_CLOSE)
1299 channel_shutw_now(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001300 stream_sock_read0(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001301 return;
Willy Tarreauce323de2012-08-20 21:41:06 +02001302}
1303
1304/*
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001305 * This is the callback which is called by the connection layer to send data
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001306 * from the buffer to the connection. It iterates over the transport layer's
1307 * snd_buf function.
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001308 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001309static void si_cs_send_cb(struct conn_stream *cs)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001310{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001311 struct connection *conn = cs->conn;
1312 struct stream_interface *si = cs->data;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001313
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001314 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001315 return;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001316
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001317 if (conn->flags & CO_FL_HANDSHAKE)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001318 /* a handshake was requested */
1319 return;
1320
1321 /* we might have been called just after an asynchronous shutw */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001322 if (si_oc(si)->flags & CF_SHUTW)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001323 return;
1324
1325 /* OK there are data waiting to be sent */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001326 si_cs_send(cs);
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001327
1328 /* OK all done */
1329 return;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001330}
1331
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001332/*
1333 * This function propagates a null read received on a socket-based connection.
1334 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001335 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001336 */
1337void stream_sock_read0(struct stream_interface *si)
1338{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001339 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001340 struct channel *ic = si_ic(si);
1341 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001342
Willy Tarreauafc8a222014-11-28 15:46:27 +01001343 ic->flags &= ~CF_SHUTR_NOW;
1344 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001345 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001346 ic->flags |= CF_SHUTR;
1347 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001348 si->flags &= ~SI_FL_WAIT_ROOM;
1349
1350 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1351 return;
1352
Willy Tarreauafc8a222014-11-28 15:46:27 +01001353 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001354 goto do_close;
1355
1356 if (si->flags & SI_FL_NOHALF) {
1357 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001358 /* force flag on ssl to keep stream in cache */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001359 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001360 goto do_close;
1361 }
1362
1363 /* otherwise that's just a normal read shutdown */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001364 __cs_stop_recv(cs);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001365 return;
1366
1367 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001368 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaua553ae92017-10-05 18:52:17 +02001369 cs_close(cs);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001370
Willy Tarreauafc8a222014-11-28 15:46:27 +01001371 oc->flags &= ~CF_SHUTW_NOW;
1372 oc->flags |= CF_SHUTW;
1373 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001374
1375 si->flags &= ~(SI_FL_WAIT_DATA | SI_FL_WAIT_ROOM);
1376
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001377 si->state = SI_ST_DIS;
1378 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001379 return;
1380}
1381
Willy Tarreau651e1822015-09-23 20:06:13 +02001382/* Callback to be used by applet handlers upon completion. It updates the stream
1383 * (which may or may not take this opportunity to try to forward data), then
Emeric Brun2802b072017-06-30 14:11:56 +02001384 * may re-enable the applet's based on the channels and stream interface's final
Willy Tarreau651e1822015-09-23 20:06:13 +02001385 * states.
1386 */
Willy Tarreauaa977ba2015-09-25 11:45:06 +02001387void si_applet_wake_cb(struct stream_interface *si)
Willy Tarreaue5f86492015-04-19 15:16:35 +02001388{
Willy Tarreaueca572f2015-09-25 19:11:55 +02001389 struct channel *ic = si_ic(si);
1390
1391 /* If the applet wants to write and the channel is closed, it's a
1392 * broken pipe and it must be reported.
1393 */
1394 if ((si->flags & SI_FL_WANT_PUT) && (ic->flags & CF_SHUTR))
1395 si->flags |= SI_FL_ERR;
1396
Willy Tarreau651e1822015-09-23 20:06:13 +02001397 /* update the stream-int, channels, and possibly wake the stream up */
1398 stream_int_notify(si);
Willy Tarreaue5f86492015-04-19 15:16:35 +02001399
Emeric Brun2802b072017-06-30 14:11:56 +02001400 /* stream_int_notify may pass throught checksnd and released some
1401 * WAIT_ROOM flags. The process_stream will consider those flags
1402 * to wakeup the appctx but in the case the task is not in runqueue
1403 * we may have to wakeup the appctx immediately.
1404 */
1405 if (!task_in_rq(si_task(si)))
1406 stream_int_update_applet(si);
1407}
Willy Tarreau452c7d52015-09-25 10:39:16 +02001408
1409/* Updates the activity status of an applet outside of the applet handler based
1410 * on the channel's flags and the stream interface's flags. It needs to be
1411 * called once after the channels' flags have settled down and the stream has
1412 * been updated. It is not designed to be called from within the applet handler
1413 * itself.
Willy Tarreau563cc372015-04-19 18:13:56 +02001414 */
1415void stream_int_update_applet(struct stream_interface *si)
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001416{
Willy Tarreaufe127932015-04-21 19:23:39 +02001417 if (((si->flags & (SI_FL_WANT_PUT|SI_FL_WAIT_ROOM)) == SI_FL_WANT_PUT) ||
1418 ((si->flags & (SI_FL_WANT_GET|SI_FL_WAIT_DATA)) == SI_FL_WANT_GET))
Willy Tarreau563cc372015-04-19 18:13:56 +02001419 appctx_wakeup(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001420}
1421
1422/*
1423 * This function performs a shutdown-read on a stream interface attached to an
1424 * applet in a connected or init state (it does nothing for other states). It
1425 * either shuts the read side or marks itself as closed. The buffer flags are
1426 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1427 * we also forward the close to the write side. The owner task is woken up if
1428 * it exists.
1429 */
1430static void stream_int_shutr_applet(struct stream_interface *si)
1431{
1432 struct channel *ic = si_ic(si);
1433
1434 ic->flags &= ~CF_SHUTR_NOW;
1435 if (ic->flags & CF_SHUTR)
1436 return;
1437 ic->flags |= CF_SHUTR;
1438 ic->rex = TICK_ETERNITY;
1439 si->flags &= ~SI_FL_WAIT_ROOM;
1440
Willy Tarreau828824a2015-04-19 17:20:03 +02001441 /* Note: on shutr, we don't call the applet */
1442
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001443 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1444 return;
1445
1446 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau958f0742015-09-25 20:24:26 +02001447 si_applet_release(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001448 si->state = SI_ST_DIS;
1449 si->exp = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001450 }
1451 else if (si->flags & SI_FL_NOHALF) {
1452 /* we want to immediately forward this close to the write side */
1453 return stream_int_shutw_applet(si);
1454 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001455}
1456
1457/*
1458 * This function performs a shutdown-write on a stream interface attached to an
1459 * applet in a connected or init state (it does nothing for other states). It
1460 * either shuts the write side or marks itself as closed. The buffer flags are
1461 * updated to reflect the new state. It does also close everything if the SI
1462 * was marked as being in error state. The owner task is woken up if it exists.
1463 */
1464static void stream_int_shutw_applet(struct stream_interface *si)
1465{
1466 struct channel *ic = si_ic(si);
1467 struct channel *oc = si_oc(si);
1468
1469 oc->flags &= ~CF_SHUTW_NOW;
1470 if (oc->flags & CF_SHUTW)
1471 return;
1472 oc->flags |= CF_SHUTW;
1473 oc->wex = TICK_ETERNITY;
1474 si->flags &= ~SI_FL_WAIT_DATA;
1475
Hongbo Longe39683c2017-03-10 18:41:51 +01001476 if (tick_isset(si->hcto)) {
1477 ic->rto = si->hcto;
1478 ic->rex = tick_add(now_ms, ic->rto);
1479 }
1480
Willy Tarreau828824a2015-04-19 17:20:03 +02001481 /* on shutw we always wake the applet up */
1482 appctx_wakeup(si_appctx(si));
1483
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001484 switch (si->state) {
1485 case SI_ST_EST:
1486 /* we have to shut before closing, otherwise some short messages
1487 * may never leave the system, especially when there are remaining
1488 * unread data in the socket input buffer, or when nolinger is set.
1489 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1490 * no risk so we close both sides immediately.
1491 */
1492 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1493 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1494 return;
1495
1496 /* fall through */
1497 case SI_ST_CON:
1498 case SI_ST_CER:
1499 case SI_ST_QUE:
1500 case SI_ST_TAR:
1501 /* Note that none of these states may happen with applets */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001502 si_applet_release(si);
Willy Tarreau958f0742015-09-25 20:24:26 +02001503 si->state = SI_ST_DIS;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001504 default:
1505 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
1506 ic->flags &= ~CF_SHUTR_NOW;
1507 ic->flags |= CF_SHUTR;
1508 ic->rex = TICK_ETERNITY;
1509 si->exp = TICK_ETERNITY;
1510 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001511}
1512
1513/* chk_rcv function for applets */
1514static void stream_int_chk_rcv_applet(struct stream_interface *si)
1515{
1516 struct channel *ic = si_ic(si);
1517
1518 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1519 __FUNCTION__,
1520 si, si->state, ic->flags, si_oc(si)->flags);
1521
1522 if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ))))
1523 return;
Willy Tarreau828824a2015-04-19 17:20:03 +02001524 /* here we only wake the applet up if it was waiting for some room */
1525 if (!(si->flags & SI_FL_WAIT_ROOM))
1526 return;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001527
Willy Tarreau828824a2015-04-19 17:20:03 +02001528 if (channel_may_recv(ic) && !ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001529 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001530 appctx_wakeup(si_appctx(si));
Thierry FOURNIER5bc2cbf2015-09-04 18:40:36 +02001531 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001532}
1533
1534/* chk_snd function for applets */
1535static void stream_int_chk_snd_applet(struct stream_interface *si)
1536{
1537 struct channel *oc = si_oc(si);
1538
1539 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1540 __FUNCTION__,
1541 si, si->state, si_ic(si)->flags, oc->flags);
1542
1543 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1544 return;
1545
Willy Tarreau828824a2015-04-19 17:20:03 +02001546 /* we only wake the applet up if it was waiting for some data */
1547
1548 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001549 return;
1550
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001551 if (!tick_isset(oc->wex))
1552 oc->wex = tick_add_ifset(now_ms, oc->wto);
1553
Willy Tarreau828824a2015-04-19 17:20:03 +02001554 if (!channel_is_empty(oc)) {
1555 /* (re)start sending */
1556 appctx_wakeup(si_appctx(si));
1557 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001558}
1559
Willy Tarreaudded32d2008-11-30 19:48:07 +01001560/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001561 * Local variables:
1562 * c-indent-level: 8
1563 * c-basic-offset: 8
1564 * End:
1565 */