blob: eb04043e4b00ed8644cc04f515c7d39df82972b4 [file] [log] [blame]
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 Houchardf6535282018-08-31 17:29:12 +020054static int si_cs_recv(struct conn_stream *cs);
Olivier Houchardc2aa7112018-09-11 18:27:21 +020055static int si_cs_process(struct conn_stream *cs);
Olivier Houchard9aaf7782017-09-13 18:30:23 +020056static int si_idle_conn_wake_cb(struct conn_stream *cs);
Olivier Houchardf6535282018-08-31 17:29:12 +020057static int si_cs_send(struct conn_stream *cs);
Willy Tarreauf873d752012-05-11 17:47:17 +020058
Willy Tarreauc5788912012-08-24 18:12:41 +020059/* stream-interface operations for embedded tasks */
60struct si_ops si_embedded_ops = {
Willy Tarreau5c979a92012-05-07 17:15:39 +020061 .chk_rcv = stream_int_chk_rcv,
62 .chk_snd = stream_int_chk_snd,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020063 .shutr = stream_int_shutr,
64 .shutw = stream_int_shutw,
Willy Tarreau5c979a92012-05-07 17:15:39 +020065};
66
Willy Tarreauc5788912012-08-24 18:12:41 +020067/* stream-interface operations for connections */
68struct si_ops si_conn_ops = {
69 .update = stream_int_update_conn,
70 .chk_rcv = stream_int_chk_rcv_conn,
71 .chk_snd = stream_int_chk_snd_conn,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020072 .shutr = stream_int_shutr_conn,
73 .shutw = stream_int_shutw_conn,
Willy Tarreauc5788912012-08-24 18:12:41 +020074};
75
Willy Tarreaud45b9f82015-04-13 16:30:14 +020076/* stream-interface operations for connections */
77struct si_ops si_applet_ops = {
78 .update = stream_int_update_applet,
79 .chk_rcv = stream_int_chk_rcv_applet,
80 .chk_snd = stream_int_chk_snd_applet,
81 .shutr = stream_int_shutr_applet,
82 .shutw = stream_int_shutw_applet,
83};
84
Willy Tarreau74beec32012-10-03 00:41:04 +020085struct data_cb si_conn_cb = {
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +010086 .name = "STRM",
Willy Tarreauc5788912012-08-24 18:12:41 +020087};
88
Willy Tarreau27375622013-12-17 00:00:28 +010089struct data_cb si_idle_conn_cb = {
Willy Tarreau27375622013-12-17 00:00:28 +010090 .wake = si_idle_conn_wake_cb,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +010091 .name = "IDLE",
Willy Tarreau27375622013-12-17 00:00:28 +010092};
93
Willy Tarreaucff64112008-11-03 06:26:53 +010094/*
95 * This function only has to be called once after a wakeup event in case of
96 * suspected timeout. It controls the stream interface timeouts and sets
97 * si->flags accordingly. It does NOT close anything, as this timeout may
98 * be used for any purpose. It returns 1 if the timeout fired, otherwise
99 * zero.
100 */
101int stream_int_check_timeouts(struct stream_interface *si)
102{
103 if (tick_is_expired(si->exp, now_ms)) {
104 si->flags |= SI_FL_EXP;
105 return 1;
106 }
107 return 0;
108}
109
Willy Tarreaufe3718a2008-11-30 18:14:12 +0100110/* to be called only when in SI_ST_DIS with SI_FL_ERR */
Willy Tarreaucff64112008-11-03 06:26:53 +0100111void stream_int_report_error(struct stream_interface *si)
112{
113 if (!si->err_type)
114 si->err_type = SI_ET_DATA_ERR;
115
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100116 si_oc(si)->flags |= CF_WRITE_ERROR;
117 si_ic(si)->flags |= CF_READ_ERROR;
Willy Tarreaucff64112008-11-03 06:26:53 +0100118}
119
120/*
Willy Tarreaudded32d2008-11-30 19:48:07 +0100121 * Returns a message to the client ; the connection is shut down for read,
122 * and the request is cleared so that no server connection can be initiated.
123 * The buffer is marked for read shutdown on the other side to protect the
124 * message, and the buffer write is enabled. The message is contained in a
Willy Tarreau148d0992010-01-10 10:21:21 +0100125 * "chunk". If it is null, then an empty message is used. The reply buffer does
126 * not need to be empty before this, and its contents will not be overwritten.
127 * The primary goal of this function is to return error messages to a client.
Willy Tarreaudded32d2008-11-30 19:48:07 +0100128 */
Willy Tarreau83061a82018-07-13 11:56:34 +0200129void stream_int_retnclose(struct stream_interface *si,
130 const struct buffer *msg)
Willy Tarreaudded32d2008-11-30 19:48:07 +0100131{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100132 struct channel *ic = si_ic(si);
133 struct channel *oc = si_oc(si);
134
135 channel_auto_read(ic);
136 channel_abort(ic);
137 channel_auto_close(ic);
138 channel_erase(ic);
139 channel_truncate(oc);
Willy Tarreau798e1282010-12-12 13:06:00 +0100140
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200141 if (likely(msg && msg->data))
142 co_inject(oc, msg->area, msg->data);
Willy Tarreaudded32d2008-11-30 19:48:07 +0100143
Willy Tarreauafc8a222014-11-28 15:46:27 +0100144 oc->wex = tick_add_ifset(now_ms, oc->wto);
145 channel_auto_read(oc);
146 channel_auto_close(oc);
147 channel_shutr_now(oc);
Willy Tarreau5d881d02009-12-27 22:51:06 +0100148}
149
Willy Tarreau4a36b562012-08-06 19:31:45 +0200150/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200151 * This function performs a shutdown-read on a detached stream interface in a
152 * connected or init state (it does nothing for other states). It either shuts
153 * the read side or marks itself as closed. The buffer flags are updated to
154 * reflect the new state. If the stream interface has SI_FL_NOHALF, we also
155 * forward the close to the write side. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200156 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200157static void stream_int_shutr(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200158{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100159 struct channel *ic = si_ic(si);
160
161 ic->flags &= ~CF_SHUTR_NOW;
162 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200163 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100164 ic->flags |= CF_SHUTR;
165 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200166 si->flags &= ~SI_FL_WAIT_ROOM;
167
168 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200169 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200170
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100171 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200172 si->state = SI_ST_DIS;
173 si->exp = TICK_ETERNITY;
Willy Tarreaud8ccffe2010-09-07 16:16:50 +0200174 }
Willy Tarreau4a36b562012-08-06 19:31:45 +0200175 else if (si->flags & SI_FL_NOHALF) {
176 /* we want to immediately forward this close to the write side */
177 return stream_int_shutw(si);
178 }
Willy Tarreau0bd05ea2010-07-02 11:18:03 +0200179
Willy Tarreau4a36b562012-08-06 19:31:45 +0200180 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100181 if (!(si->flags & SI_FL_DONT_WAKE))
182 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200183}
184
Willy Tarreau4a36b562012-08-06 19:31:45 +0200185/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200186 * This function performs a shutdown-write on a detached stream interface in a
187 * connected or init state (it does nothing for other states). It either shuts
188 * the write side or marks itself as closed. The buffer flags are updated to
189 * reflect the new state. It does also close everything if the SI was marked as
190 * being in error state. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200191 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200192static void stream_int_shutw(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200193{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100194 struct channel *ic = si_ic(si);
195 struct channel *oc = si_oc(si);
196
197 oc->flags &= ~CF_SHUTW_NOW;
198 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200199 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100200 oc->flags |= CF_SHUTW;
201 oc->wex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200202 si->flags &= ~SI_FL_WAIT_DATA;
203
Hongbo Longe39683c2017-03-10 18:41:51 +0100204 if (tick_isset(si->hcto)) {
205 ic->rto = si->hcto;
206 ic->rex = tick_add(now_ms, ic->rto);
207 }
208
Willy Tarreaufb90d942009-09-05 20:57:35 +0200209 switch (si->state) {
210 case SI_ST_EST:
Willy Tarreau4a36b562012-08-06 19:31:45 +0200211 /* we have to shut before closing, otherwise some short messages
212 * may never leave the system, especially when there are remaining
213 * unread data in the socket input buffer, or when nolinger is set.
214 * However, if SI_FL_NOLINGER is explicitly set, we know there is
215 * no risk so we close both sides immediately.
216 */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200217 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
Willy Tarreauafc8a222014-11-28 15:46:27 +0100218 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200219 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200220
221 /* fall through */
222 case SI_ST_CON:
223 case SI_ST_CER:
Willy Tarreau32d3ee92010-12-29 14:03:02 +0100224 case SI_ST_QUE:
225 case SI_ST_TAR:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200226 /* Note that none of these states may happen with applets */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200227 si->state = SI_ST_DIS;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200228 default:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200229 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100230 ic->flags &= ~CF_SHUTR_NOW;
231 ic->flags |= CF_SHUTR;
232 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200233 si->exp = TICK_ETERNITY;
234 }
235
Willy Tarreau4a36b562012-08-06 19:31:45 +0200236 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100237 if (!(si->flags & SI_FL_DONT_WAKE))
238 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200239}
240
241/* default chk_rcv function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200242static void stream_int_chk_rcv(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200243{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100244 struct channel *ic = si_ic(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200245
Willy Tarreauafc8a222014-11-28 15:46:27 +0100246 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200247 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100248 si, si->state, ic->flags, si_oc(si)->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200249
Willy Tarreauafc8a222014-11-28 15:46:27 +0100250 if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ))))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200251 return;
252
Willy Tarreauafc8a222014-11-28 15:46:27 +0100253 if (!channel_may_recv(ic) || ic->pipe) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200254 /* stop reading */
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +0200255 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200256 }
257 else {
258 /* (re)start reading */
259 si->flags &= ~SI_FL_WAIT_ROOM;
Willy Tarreau07373b82014-11-28 12:08:47 +0100260 if (!(si->flags & SI_FL_DONT_WAKE))
261 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200262 }
263}
264
265/* default chk_snd function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200266static void stream_int_chk_snd(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200267{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100268 struct channel *oc = si_oc(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200269
Willy Tarreauafc8a222014-11-28 15:46:27 +0100270 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200271 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100272 si, si->state, si_ic(si)->flags, oc->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200273
Willy Tarreauafc8a222014-11-28 15:46:27 +0100274 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200275 return;
276
277 if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100278 channel_is_empty(oc)) /* called with nothing to send ! */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200279 return;
280
281 /* Otherwise there are remaining data to be sent in the buffer,
282 * so we tell the handler.
283 */
284 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100285 if (!tick_isset(oc->wex))
286 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200287
Willy Tarreau07373b82014-11-28 12:08:47 +0100288 if (!(si->flags & SI_FL_DONT_WAKE))
289 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200290}
291
Willy Tarreaua9ff5e62015-07-19 18:46:30 +0200292/* Register an applet to handle a stream_interface as a new appctx. The SI will
293 * wake it up everytime it is solicited. The appctx must be deleted by the task
294 * handler using si_release_endpoint(), possibly from within the function itself.
295 * It also pre-initializes the applet's context and returns it (or NULL in case
296 * it could not be allocated).
Willy Tarreaufb90d942009-09-05 20:57:35 +0200297 */
Willy Tarreau30576452015-04-13 13:50:30 +0200298struct appctx *stream_int_register_handler(struct stream_interface *si, struct applet *app)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200299{
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100300 struct appctx *appctx;
301
Willy Tarreau07373b82014-11-28 12:08:47 +0100302 DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si_task(si));
Willy Tarreaufb90d942009-09-05 20:57:35 +0200303
Willy Tarreaua7513f52015-04-05 00:15:26 +0200304 appctx = si_alloc_appctx(si, app);
Willy Tarreaua69fc9f2014-12-22 19:34:00 +0100305 if (!appctx)
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100306 return NULL;
307
Willy Tarreaufe127932015-04-21 19:23:39 +0200308 si_applet_cant_get(si);
Willy Tarreau828824a2015-04-19 17:20:03 +0200309 appctx_wakeup(appctx);
Willy Tarreau1fbe1c92013-12-01 09:35:41 +0100310 return si_appctx(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200311}
312
Willy Tarreau2c6be842012-07-06 17:12:34 +0200313/* This callback is used to send a valid PROXY protocol line to a socket being
Willy Tarreauafad0e02012-08-09 14:45:22 +0200314 * established. It returns 0 if it fails in a fatal way or needs to poll to go
315 * further, otherwise it returns non-zero and removes itself from the connection's
Willy Tarreaua1a74742012-08-24 12:14:49 +0200316 * flags (the bit is provided in <flag> by the caller). It is designed to be
317 * called by the connection handler and relies on it to commit polling changes.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200318 * Note that it can emit a PROXY line by relying on the other end's address
319 * when the connection is attached to a stream interface, or by resolving the
320 * local address otherwise (also called a LOCAL line).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200321 */
322int conn_si_send_proxy(struct connection *conn, unsigned int flag)
323{
Willy Tarreau2c6be842012-07-06 17:12:34 +0200324 /* we might have been called just after an asynchronous shutw */
Willy Tarreaua1a74742012-08-24 12:14:49 +0200325 if (conn->flags & CO_FL_SOCK_WR_SH)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200326 goto out_error;
327
Willy Tarreaud02cdd22013-12-15 10:23:20 +0100328 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200329 goto out_error;
330
Willy Tarreau2c6be842012-07-06 17:12:34 +0200331 /* If we have a PROXY line to send, we'll use this to validate the
332 * connection, in which case the connection is validated only once
333 * we've sent the whole proxy line. Otherwise we use connect().
334 */
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200335 while (conn->send_proxy_ofs) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200336 struct conn_stream *cs;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200337 int ret;
338
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200339 cs = conn->mux_ctx;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200340 /* The target server expects a PROXY line to be sent first.
341 * If the send_proxy_ofs is negative, it corresponds to the
342 * offset to start sending from then end of the proxy string
343 * (which is recomputed every time since it's constant). If
344 * it is positive, it means we have to send from the start.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200345 * We can only send a "normal" PROXY line when the connection
346 * is attached to a stream interface. Otherwise we can only
347 * send a LOCAL line (eg: for use with health checks).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200348 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200349 if (conn->mux == &mux_pt_ops && cs->data_cb == &si_conn_cb) {
350 struct stream_interface *si = cs->data;
351 struct conn_stream *remote_cs = objt_cs(si_opposite(si)->end);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200352 ret = make_proxy_line(trash.area, trash.size,
353 objt_server(conn->target),
354 remote_cs ? remote_cs->conn : NULL);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200355 }
356 else {
357 /* The target server expects a LOCAL line to be sent first. Retrieving
358 * local or remote addresses may fail until the connection is established.
359 */
360 conn_get_from_addr(conn);
361 if (!(conn->flags & CO_FL_ADDR_FROM_SET))
362 goto out_wait;
363
364 conn_get_to_addr(conn);
365 if (!(conn->flags & CO_FL_ADDR_TO_SET))
366 goto out_wait;
367
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200368 ret = make_proxy_line(trash.area, trash.size,
369 objt_server(conn->target), conn);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200370 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200371
Willy Tarreau2c6be842012-07-06 17:12:34 +0200372 if (!ret)
373 goto out_error;
374
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200375 if (conn->send_proxy_ofs > 0)
376 conn->send_proxy_ofs = -ret; /* first call */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200377
Willy Tarreaua1a74742012-08-24 12:14:49 +0200378 /* we have to send trash from (ret+sp for -sp bytes). If the
379 * data layer has a pending write, we'll also set MSG_MORE.
380 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200381 ret = conn_sock_send(conn,
382 trash.area + ret + conn->send_proxy_ofs,
383 -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
Willy Tarreau27375622013-12-17 00:00:28 +0100416/* Callback to be used by connection I/O handlers when some activity is detected
417 * on an idle server connection. Its main purpose is to kill the connection once
418 * a close was detected on it. It returns 0 if it did nothing serious, or -1 if
419 * it killed the connection.
420 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200421static int si_idle_conn_wake_cb(struct conn_stream *cs)
Willy Tarreau27375622013-12-17 00:00:28 +0100422{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200423 struct connection *conn = cs->conn;
424 struct stream_interface *si = cs->data;
Willy Tarreau27375622013-12-17 00:00:28 +0100425
426 if (!conn_ctrl_ready(conn))
427 return 0;
428
Olivier Houchardaf4021e2018-08-09 13:06:55 +0200429 conn_sock_drain(conn);
430
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200431 if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH) || cs->flags & CS_FL_ERROR) {
Willy Tarreau27375622013-12-17 00:00:28 +0100432 /* warning, we can't do anything on <conn> after this call ! */
Willy Tarreauc4b56e42015-09-23 17:56:02 +0200433 si_release_endpoint(si);
Willy Tarreau27375622013-12-17 00:00:28 +0100434 return -1;
435 }
436 return 0;
437}
438
Willy Tarreau615f28b2015-09-23 18:40:09 +0200439/* This function is the equivalent to stream_int_update() except that it's
440 * designed to be called from outside the stream handlers, typically the lower
441 * layers (applets, connections) after I/O completion. After updating the stream
442 * interface and timeouts, it will try to forward what can be forwarded, then to
443 * wake the associated task up if an important event requires special handling.
444 * It should not be called from within the stream itself, stream_int_update()
445 * is designed for this.
446 */
447void stream_int_notify(struct stream_interface *si)
448{
449 struct channel *ic = si_ic(si);
450 struct channel *oc = si_oc(si);
451
452 /* process consumer side */
453 if (channel_is_empty(oc)) {
Olivier Houcharde9bed532017-11-16 17:49:25 +0100454 struct connection *conn = objt_cs(si->end) ? objt_cs(si->end)->conn : NULL;
455
Willy Tarreau615f28b2015-09-23 18:40:09 +0200456 if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) &&
Olivier Houcharde9bed532017-11-16 17:49:25 +0100457 (si->state == SI_ST_EST) && (!conn || !(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS))))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200458 si_shutw(si);
459 oc->wex = TICK_ETERNITY;
460 }
461
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100462 /* indicate that we may be waiting for data from the output channel or
463 * we're about to close and can't expect more data if SHUTW_NOW is there.
464 */
Willy Tarreau615f28b2015-09-23 18:40:09 +0200465 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && channel_may_recv(oc))
466 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100467 else if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)
468 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200469
470 /* update OC timeouts and wake the other side up if it's waiting for room */
471 if (oc->flags & CF_WRITE_ACTIVITY) {
472 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
473 !channel_is_empty(oc))
474 if (tick_isset(oc->wex))
475 oc->wex = tick_add_ifset(now_ms, oc->wto);
476
477 if (!(si->flags & SI_FL_INDEP_STR))
478 if (tick_isset(ic->rex))
479 ic->rex = tick_add_ifset(now_ms, ic->rto);
480
481 if (likely((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL &&
482 channel_may_recv(oc) &&
483 (si_opposite(si)->flags & SI_FL_WAIT_ROOM)))
484 si_chk_rcv(si_opposite(si));
485 }
486
487 /* Notify the other side when we've injected data into the IC that
488 * needs to be forwarded. We can do fast-forwarding as soon as there
489 * are output data, but we avoid doing this if some of the data are
490 * not yet scheduled for being forwarded, because it is very likely
491 * that it will be done again immediately afterwards once the following
492 * data are parsed (eg: HTTP chunking). We only SI_FL_WAIT_ROOM once
493 * we've emptied *some* of the output buffer, and not just when there
494 * is available room, because applets are often forced to stop before
495 * the buffer is full. We must not stop based on input data alone because
496 * an HTTP parser might need more data to complete the parsing.
497 */
Bin Wang95fad5b2017-09-15 14:56:40 +0800498
499 /* ensure it's only set if a write attempt has succeeded */
500 ic->flags &= ~CF_WRITE_PARTIAL;
501
Willy Tarreau615f28b2015-09-23 18:40:09 +0200502 if (!channel_is_empty(ic) &&
503 (si_opposite(si)->flags & SI_FL_WAIT_DATA) &&
Willy Tarreau77e478c2018-06-19 07:03:14 +0200504 (ci_data(ic) == 0 || ic->pipe)) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200505 int new_len, last_len;
506
Willy Tarreau77e478c2018-06-19 07:03:14 +0200507 last_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200508 if (ic->pipe)
509 last_len += ic->pipe->data;
510
511 si_chk_snd(si_opposite(si));
512
Willy Tarreau77e478c2018-06-19 07:03:14 +0200513 new_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200514 if (ic->pipe)
515 new_len += ic->pipe->data;
516
517 /* check if the consumer has freed some space either in the
518 * buffer or in the pipe.
519 */
520 if (channel_may_recv(ic) && new_len < last_len)
521 si->flags &= ~SI_FL_WAIT_ROOM;
522 }
523
524 if (si->flags & SI_FL_WAIT_ROOM) {
525 ic->rex = TICK_ETERNITY;
526 }
527 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL &&
528 channel_may_recv(ic)) {
529 /* we must re-enable reading if si_chk_snd() has freed some space */
530 if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex))
531 ic->rex = tick_add_ifset(now_ms, ic->rto);
532 }
533
534 /* wake the task up only when needed */
535 if (/* changes on the production side */
536 (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
537 si->state != SI_ST_EST ||
538 (si->flags & SI_FL_ERR) ||
539 ((ic->flags & CF_READ_PARTIAL) &&
540 (!ic->to_forward || si_opposite(si)->state != SI_ST_EST)) ||
541
542 /* changes on the consumption side */
543 (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
Christopher Fauletc5a9d5b2017-11-09 09:36:43 +0100544 ((oc->flags & (CF_WRITE_ACTIVITY|CF_WRITE_EVENT)) &&
Willy Tarreau615f28b2015-09-23 18:40:09 +0200545 ((oc->flags & CF_SHUTW) ||
546 ((oc->flags & CF_WAKE_WRITE) &&
547 (si_opposite(si)->state != SI_ST_EST ||
548 (channel_is_empty(oc) && !oc->to_forward)))))) {
549 task_wakeup(si_task(si), TASK_WOKEN_IO);
550 }
551 if (ic->flags & CF_READ_ACTIVITY)
552 ic->flags &= ~CF_READ_DONTWAIT;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200553}
554
555
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200556/* Called by I/O handlers after completion.. It propagates
Willy Tarreau651e1822015-09-23 20:06:13 +0200557 * connection flags to the stream interface, updates the stream (which may or
558 * may not take this opportunity to try to forward data), then update the
559 * connection's polling based on the channels and stream interface's final
560 * states. The function always returns 0.
Willy Tarreau100c4672012-08-20 12:06:26 +0200561 */
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200562static int si_cs_process(struct conn_stream *cs)
Willy Tarreaufd31e532012-07-23 18:24:25 +0200563{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200564 struct connection *conn = cs->conn;
565 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100566 struct channel *ic = si_ic(si);
567 struct channel *oc = si_oc(si);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200568
Olivier Houchardc7ffa912018-08-28 19:37:41 +0200569 /* If we have data to send, try it now */
570 if (!channel_is_empty(oc) && objt_cs(si->end))
571 si_cs_send(objt_cs(si->end));
Willy Tarreau651e1822015-09-23 20:06:13 +0200572 /* First step, report to the stream-int what was detected at the
573 * connection layer : errors and connection establishment.
574 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200575 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreau3c55ec22012-07-23 19:19:51 +0200576 si->flags |= SI_FL_ERR;
577
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200578 /* If we had early data, and the handshake ended, then
579 * we can remove the flag, and attempt to wake the task up,
580 * in the event there's an analyser waiting for the end of
581 * the handshake.
582 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +0100583 if (!(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS)) &&
584 (cs->flags & CS_FL_WAIT_FOR_HS)) {
585 cs->flags &= ~CS_FL_WAIT_FOR_HS;
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200586 task_wakeup(si_task(si), TASK_WOKEN_MSG);
587 }
588
Willy Tarreau52821e22017-03-18 17:11:37 +0100589 if ((si->state < SI_ST_EST) &&
590 (conn->flags & (CO_FL_CONNECTED | CO_FL_HANDSHAKE)) == CO_FL_CONNECTED) {
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200591 si->exp = TICK_ETERNITY;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100592 oc->flags |= CF_WRITE_NULL;
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200593 }
594
Willy Tarreau651e1822015-09-23 20:06:13 +0200595 /* Second step : update the stream-int and channels, try to forward any
596 * pending data, then possibly wake the stream up based on the new
597 * stream-int status.
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200598 */
Willy Tarreau651e1822015-09-23 20:06:13 +0200599 stream_int_notify(si);
Christopher Fauleta73e59b2016-12-09 17:30:18 +0100600 channel_release_buffer(ic, &(si_strm(si)->buffer_wait));
Willy Tarreauea3cc482015-09-23 19:37:00 +0200601
Willy Tarreau651e1822015-09-23 20:06:13 +0200602 /* Third step : update the connection's polling status based on what
603 * was done above (eg: maybe some buffers got emptied).
604 */
605 if (channel_is_empty(oc))
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200606 __cs_stop_send(cs);
Willy Tarreauea3cc482015-09-23 19:37:00 +0200607
Willy Tarreaufd31e532012-07-23 18:24:25 +0200608
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200609 if (si->flags & SI_FL_WAIT_ROOM) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200610 __cs_stop_recv(cs);
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200611 }
Willy Tarreauafc8a222014-11-28 15:46:27 +0100612 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL &&
613 channel_may_recv(ic)) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200614 __cs_want_recv(cs);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200615 }
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200616 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200617}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200618
Willy Tarreau5368d802012-08-21 18:22:06 +0200619/*
620 * This function is called to send buffer data to a stream socket.
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200621 * It calls the mux layer's snd_buf function. It relies on the
Godbach4f489902013-12-04 17:24:06 +0800622 * caller to commit polling changes. The caller should check conn->flags
623 * for errors.
Willy Tarreau5368d802012-08-21 18:22:06 +0200624 */
Olivier Houchardf6535282018-08-31 17:29:12 +0200625static int si_cs_send(struct conn_stream *cs)
Willy Tarreau5368d802012-08-21 18:22:06 +0200626{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200627 struct connection *conn = cs->conn;
628 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100629 struct channel *oc = si_oc(si);
Willy Tarreau5368d802012-08-21 18:22:06 +0200630 int ret;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200631 int did_send = 0;
632
633 /* We're already waiting to be able to send, give up */
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200634 if (si->wait_list.wait_reason & SUB_CAN_SEND)
Olivier Houchardf6535282018-08-31 17:29:12 +0200635 return 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200636
637 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200638 return 1;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200639
640 if (conn->flags & CO_FL_HANDSHAKE) {
641 /* a handshake was requested */
642 /* Schedule ourself to be woken up once the handshake is done */
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200643 conn->xprt->subscribe(conn, SUB_CAN_SEND, &si->wait_list);
Olivier Houchardf6535282018-08-31 17:29:12 +0200644 return 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200645 }
646
647 /* we might have been called just after an asynchronous shutw */
648 if (si_oc(si)->flags & CF_SHUTW)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200649 return 1;
Willy Tarreau5368d802012-08-21 18:22:06 +0200650
Bin Wang95fad5b2017-09-15 14:56:40 +0800651 /* ensure it's only set if a write attempt has succeeded */
652 oc->flags &= ~CF_WRITE_PARTIAL;
653
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200654 if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) {
655 ret = conn->mux->snd_pipe(cs, oc->pipe);
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200656 if (ret > 0) {
Christopher Fauletc5a9d5b2017-11-09 09:36:43 +0100657 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA | CF_WRITE_EVENT;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200658 did_send = 1;
659 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200660
Willy Tarreauafc8a222014-11-28 15:46:27 +0100661 if (!oc->pipe->data) {
662 put_pipe(oc->pipe);
663 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200664 }
665
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200666 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardf6535282018-08-31 17:29:12 +0200667 return 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200668 }
669
670 /* At this point, the pipe is empty, but we may still have data pending
671 * in the normal buffer.
672 */
Willy Tarreau77e478c2018-06-19 07:03:14 +0200673 if (!co_data(oc))
Olivier Houchard71384552018-09-12 15:21:03 +0200674 return did_send;
Willy Tarreau5368d802012-08-21 18:22:06 +0200675
Godbache68e02d2013-10-11 15:48:29 +0800676 /* when we're here, we already know that there is no spliced
Willy Tarreau5368d802012-08-21 18:22:06 +0200677 * data left, and that there are sendable buffered data.
678 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200679 if (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_HANDSHAKE)) &&
680 !(cs->flags & CS_FL_ERROR) && !(oc->flags & CF_SHUTW)) {
Willy Tarreau5368d802012-08-21 18:22:06 +0200681 /* check if we want to inform the kernel that we're interested in
682 * sending more data after this call. We want this if :
683 * - we're about to close after this last send and want to merge
684 * the ongoing FIN with the last segment.
685 * - we know we can't send everything at once and must get back
686 * here because of unaligned data
687 * - there is still a finite amount of data to forward
688 * The test is arranged so that the most common case does only 2
689 * tests.
690 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100691 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200692
Willy Tarreauafc8a222014-11-28 15:46:27 +0100693 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
694 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
Willy Tarreau4ac49282017-10-17 16:33:46 +0200695 (oc->flags & CF_EXPECT_MORE))) ||
Willy Tarreauecd2e152017-11-07 15:07:25 +0100696 ((oc->flags & CF_ISRESP) &&
697 ((oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW)) == (CF_AUTO_CLOSE|CF_SHUTW_NOW))))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100698 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200699
Willy Tarreauafc8a222014-11-28 15:46:27 +0100700 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100701 send_flag |= CO_SFL_STREAMER;
702
Olivier Houcharded0f2072018-08-16 15:41:52 +0200703 ret = cs->conn->mux->snd_buf(cs, &oc->buf, co_data(oc), send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800704 if (ret > 0) {
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200705 did_send = 1;
Christopher Fauletc5a9d5b2017-11-09 09:36:43 +0100706 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA | CF_WRITE_EVENT;
Willy Tarreau5368d802012-08-21 18:22:06 +0200707
Willy Tarreau77e478c2018-06-19 07:03:14 +0200708 co_set_data(oc, co_data(oc) - ret);
Willy Tarreaudeccd112018-06-14 18:38:55 +0200709 c_realign_if_empty(oc);
710
711 if (!co_data(oc)) {
Godbache68e02d2013-10-11 15:48:29 +0800712 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100713 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800714 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200715
Godbache68e02d2013-10-11 15:48:29 +0800716 /* if some data remain in the buffer, it's only because the
717 * system buffers are full, we will try next time.
718 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200719 }
Godbache68e02d2013-10-11 15:48:29 +0800720 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200721 /* We couldn't send all of our data, let the mux know we'd like to send more */
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200722 if (co_data(oc)) {
723 cs_want_send(cs);
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200724 conn->mux->subscribe(cs, SUB_CAN_SEND, &si->wait_list);
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200725 }
Olivier Houchardf6535282018-08-31 17:29:12 +0200726 return did_send;
Willy Tarreau5368d802012-08-21 18:22:06 +0200727}
728
Olivier Houchard91894cb2018-08-02 18:06:28 +0200729struct task *si_cs_io_cb(struct task *t, void *ctx, unsigned short state)
730{
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200731 struct stream_interface *si = ctx;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200732 struct conn_stream *cs = objt_cs(si->end);
Olivier Houchardf6535282018-08-31 17:29:12 +0200733 int ret = 0;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200734
735 if (!cs)
736 return NULL;
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200737redo:
Olivier Houchardf6535282018-08-31 17:29:12 +0200738 if (!(si->wait_list.wait_reason & SUB_CAN_SEND))
739 ret = si_cs_send(cs);
740 if (!(si->wait_list.wait_reason & SUB_CAN_RECV))
741 ret |= si_cs_recv(cs);
742 if (ret != 0)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200743 si_cs_process(cs);
Olivier Houchardf6535282018-08-31 17:29:12 +0200744
Olivier Houchard91894cb2018-08-02 18:06:28 +0200745 return (NULL);
746}
747
Willy Tarreau25f13102015-09-24 11:32:22 +0200748/* This function is designed to be called from within the stream handler to
749 * update the channels' expiration timers and the stream interface's flags
750 * based on the channels' flags. It needs to be called only once after the
751 * channels' flags have settled down, and before they are cleared, though it
752 * doesn't harm to call it as often as desired (it just slightly hurts
753 * performance). It must not be called from outside of the stream handler,
754 * as what it does will be used to compute the stream task's expiration.
755 */
756void stream_int_update(struct stream_interface *si)
757{
758 struct channel *ic = si_ic(si);
759 struct channel *oc = si_oc(si);
760
761 if (!(ic->flags & CF_SHUTR)) {
762 /* Read not closed, update FD status and timeout for reads */
763 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
764 /* stop reading */
765 if (!(si->flags & SI_FL_WAIT_ROOM)) {
766 if (!(ic->flags & CF_DONT_READ)) /* full */
767 si->flags |= SI_FL_WAIT_ROOM;
768 ic->rex = TICK_ETERNITY;
769 }
770 }
Willy Tarreau171d5f22018-07-24 16:56:34 +0200771 else if (!(si->flags & SI_FL_WAIT_ROOM) || !co_data(ic)) {
Willy Tarreau25f13102015-09-24 11:32:22 +0200772 /* (re)start reading and update timeout. Note: we don't recompute the timeout
773 * everytime we get here, otherwise it would risk never to expire. We only
774 * update it if is was not yet set. The stream socket handler will already
775 * have updated it if there has been a completed I/O.
776 */
777 si->flags &= ~SI_FL_WAIT_ROOM;
778 if (!(ic->flags & (CF_READ_NOEXP|CF_DONT_READ)) && !tick_isset(ic->rex))
779 ic->rex = tick_add_ifset(now_ms, ic->rto);
780 }
781 }
782
783 if (!(oc->flags & CF_SHUTW)) {
784 /* Write not closed, update FD status and timeout for writes */
785 if (channel_is_empty(oc)) {
786 /* stop writing */
787 if (!(si->flags & SI_FL_WAIT_DATA)) {
788 if ((oc->flags & CF_SHUTW_NOW) == 0)
789 si->flags |= SI_FL_WAIT_DATA;
790 oc->wex = TICK_ETERNITY;
791 }
792 }
793 else {
794 /* (re)start writing and update timeout. Note: we don't recompute the timeout
795 * everytime we get here, otherwise it would risk never to expire. We only
796 * update it if is was not yet set. The stream socket handler will already
797 * have updated it if there has been a completed I/O.
798 */
799 si->flags &= ~SI_FL_WAIT_DATA;
800 if (!tick_isset(oc->wex)) {
801 oc->wex = tick_add_ifset(now_ms, oc->wto);
802 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
803 /* Note: depending on the protocol, we don't know if we're waiting
804 * for incoming data or not. So in order to prevent the socket from
805 * expiring read timeouts during writes, we refresh the read timeout,
806 * except if it was already infinite or if we have explicitly setup
807 * independent streams.
808 */
809 ic->rex = tick_add_ifset(now_ms, ic->rto);
810 }
811 }
812 }
813 }
814}
815
Willy Tarreau452c7d52015-09-25 10:39:16 +0200816/* Updates the polling status of a connection outside of the connection handler
817 * based on the channel's flags and the stream interface's flags. It needs to be
818 * called once after the channels' flags have settled down and the stream has
819 * been updated. It is not designed to be called from within the connection
820 * handler itself.
Willy Tarreau100c4672012-08-20 12:06:26 +0200821 */
822void stream_int_update_conn(struct stream_interface *si)
823{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100824 struct channel *ic = si_ic(si);
825 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200826 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreau100c4672012-08-20 12:06:26 +0200827
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200828 if (!(ic->flags & CF_SHUTR)) {
829 /* Read not closed */
830 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic))
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200831 __cs_stop_recv(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200832 else
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200833 __cs_want_recv(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200834 }
835
836 if (!(oc->flags & CF_SHUTW)) {
837 /* Write not closed */
838 if (channel_is_empty(oc))
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200839 __cs_stop_send(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200840 else
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200841 __cs_want_send(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200842 }
843
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200844 cs_update_mux_polling(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200845}
846
847/*
848 * This function performs a shutdown-read on a stream interface attached to
849 * a connection in a connected or init state (it does nothing for other
850 * states). It either shuts the read side or marks itself as closed. The buffer
851 * flags are updated to reflect the new state. If the stream interface has
852 * SI_FL_NOHALF, we also forward the close to the write side. If a control
853 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +0200854 * descriptors are then shutdown or closed accordingly. The function
855 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200856 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200857static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200858{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200859 struct conn_stream *cs = __objt_cs(si->end);
860 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100861 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200862
Willy Tarreauafc8a222014-11-28 15:46:27 +0100863 ic->flags &= ~CF_SHUTR_NOW;
864 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200865 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100866 ic->flags |= CF_SHUTR;
867 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200868 si->flags &= ~SI_FL_WAIT_ROOM;
869
870 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200871 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200872
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100873 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaua553ae92017-10-05 18:52:17 +0200874 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200875 si->state = SI_ST_DIS;
876 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200877 }
878 else if (si->flags & SI_FL_NOHALF) {
879 /* we want to immediately forward this close to the write side */
880 return stream_int_shutw_conn(si);
881 }
882 else if (conn->ctrl) {
883 /* we want the caller to disable polling on this FD */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200884 cs_stop_recv(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200885 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200886}
887
888/*
889 * This function performs a shutdown-write on a stream interface attached to
890 * a connection in a connected or init state (it does nothing for other
891 * states). It either shuts the write side or marks itself as closed. The
892 * buffer flags are updated to reflect the new state. It does also close
893 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +0100894 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200895 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200896static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200897{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200898 struct conn_stream *cs = __objt_cs(si->end);
899 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100900 struct channel *ic = si_ic(si);
901 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200902
Willy Tarreauafc8a222014-11-28 15:46:27 +0100903 oc->flags &= ~CF_SHUTW_NOW;
904 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200905 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100906 oc->flags |= CF_SHUTW;
907 oc->wex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200908 si->flags &= ~SI_FL_WAIT_DATA;
909
Hongbo Longe39683c2017-03-10 18:41:51 +0100910 if (tick_isset(si->hcto)) {
911 ic->rto = si->hcto;
912 ic->rex = tick_add(now_ms, ic->rto);
913 }
914
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200915 switch (si->state) {
916 case SI_ST_EST:
917 /* we have to shut before closing, otherwise some short messages
918 * may never leave the system, especially when there are remaining
919 * unread data in the socket input buffer, or when nolinger is set.
920 * However, if SI_FL_NOLINGER is explicitly set, we know there is
921 * no risk so we close both sides immediately.
922 */
923 if (si->flags & SI_FL_ERR) {
924 /* quick close, the socket is alredy shut anyway */
925 }
926 else if (si->flags & SI_FL_NOLINGER) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200927 /* unclean data-layer shutdown, typically an aborted request
928 * or a forwarded shutdown from a client to a server due to
929 * option abortonclose. No need for the TLS layer to try to
930 * emit a shutdown message.
931 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200932 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200933 }
934 else {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200935 /* clean data-layer shutdown. This only happens on the
936 * frontend side, or on the backend side when forwarding
937 * a client close in TCP mode or in HTTP TUNNEL mode
938 * while option abortonclose is set. We want the TLS
939 * layer to try to signal it to the peer before we close.
940 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200941 cs_shutw(cs, CS_SHW_NORMAL);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200942
Willy Tarreaua553ae92017-10-05 18:52:17 +0200943 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
944 /* OK just a shutw, but we want the caller
945 * to disable polling on this FD if exists.
946 */
947 conn_cond_update_polling(conn);
948 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200949 }
950 }
951
952 /* fall through */
953 case SI_ST_CON:
954 /* we may have to close a pending connection, and mark the
955 * response buffer as shutr
956 */
Willy Tarreaua553ae92017-10-05 18:52:17 +0200957 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200958 /* fall through */
959 case SI_ST_CER:
960 case SI_ST_QUE:
961 case SI_ST_TAR:
962 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +0200963 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200964 default:
965 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100966 ic->flags &= ~CF_SHUTR_NOW;
967 ic->flags |= CF_SHUTR;
968 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200969 si->exp = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +0200970 }
971}
972
Willy Tarreau46a8d922012-08-20 12:38:36 +0200973/* This function is used for inter-stream-interface calls. It is called by the
974 * consumer to inform the producer side that it may be interested in checking
975 * for free space in the buffer. Note that it intentionally does not update
976 * timeouts, so that we can still check them later at wake-up. This function is
977 * dedicated to connection-based stream interfaces.
978 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200979static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +0200980{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100981 struct channel *ic = si_ic(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200982 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200983
Willy Tarreauafc8a222014-11-28 15:46:27 +0100984 if (unlikely(si->state > SI_ST_EST || (ic->flags & CF_SHUTR)))
Willy Tarreau46a8d922012-08-20 12:38:36 +0200985 return;
986
Willy Tarreauafc8a222014-11-28 15:46:27 +0100987 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
Willy Tarreau46a8d922012-08-20 12:38:36 +0200988 /* stop reading */
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200989 if (!(ic->flags & CF_DONT_READ)) /* full */ {
Willy Tarreau46a8d922012-08-20 12:38:36 +0200990 si->flags |= SI_FL_WAIT_ROOM;
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200991 }
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200992 __cs_stop_recv(cs);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200993 }
994 else {
995 /* (re)start reading */
996 si->flags &= ~SI_FL_WAIT_ROOM;
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200997 __cs_want_recv(cs);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200998 }
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200999 cs_update_mux_polling(cs);
Willy Tarreau46a8d922012-08-20 12:38:36 +02001000}
1001
1002
Willy Tarreaude5722c2012-08-20 15:01:10 +02001003/* This function is used for inter-stream-interface calls. It is called by the
1004 * producer to inform the consumer side that it may be interested in checking
1005 * for data in the buffer. Note that it intentionally does not update timeouts,
1006 * so that we can still check them later at wake-up.
1007 */
Willy Tarreauc5788912012-08-24 18:12:41 +02001008static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001009{
Willy Tarreauafc8a222014-11-28 15:46:27 +01001010 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001011 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001012
Bin Wang95fad5b2017-09-15 14:56:40 +08001013 /* ensure it's only set if a write attempt has succeeded */
1014 oc->flags &= ~CF_WRITE_PARTIAL;
1015
Willy Tarreauafc8a222014-11-28 15:46:27 +01001016 if (unlikely(si->state > SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +02001017 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001018
Willy Tarreauafc8a222014-11-28 15:46:27 +01001019 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001020 return;
1021
Willy Tarreauafc8a222014-11-28 15:46:27 +01001022 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +01001023 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001024 return;
1025
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001026 if (cs->flags & CS_FL_DATA_WR_ENA) {
Willy Tarreau5007d2a2013-07-18 22:09:48 +02001027 /* already subscribed to write notifications, will be called
1028 * anyway, so let's avoid calling it especially if the reader
1029 * is not ready.
1030 */
1031 return;
1032 }
1033
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001034 __cs_want_send(cs);
Willy Tarreaud29a0662012-12-10 16:33:38 +01001035
Olivier Houchard91894cb2018-08-02 18:06:28 +02001036 si_cs_send(cs);
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001037 if (cs->flags & CS_FL_ERROR || cs->conn->flags & CO_FL_ERROR) {
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001038 /* Write error on the file descriptor */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001039 __cs_stop_both(cs);
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001040 si->flags |= SI_FL_ERR;
1041 goto out_wakeup;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001042 }
1043
1044 /* OK, so now we know that some data might have been sent, and that we may
1045 * have to poll first. We have to do that too if the buffer is not empty.
1046 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001047 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001048 /* the connection is established but we can't write. Either the
1049 * buffer is empty, or we just refrain from sending because the
1050 * ->o limit was reached. Maybe we just wrote the last
1051 * chunk and need to close.
1052 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001053 __cs_stop_send(cs);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001054 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001055 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreaude5722c2012-08-20 15:01:10 +02001056 (si->state == SI_ST_EST)) {
1057 si_shutw(si);
1058 goto out_wakeup;
1059 }
1060
Willy Tarreauafc8a222014-11-28 15:46:27 +01001061 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001062 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001063 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001064 }
1065 else {
1066 /* Otherwise there are remaining data to be sent in the buffer,
1067 * which means we have to poll before doing so.
1068 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001069 __cs_want_send(cs);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001070 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001071 if (!tick_isset(oc->wex))
1072 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001073 }
1074
Willy Tarreauafc8a222014-11-28 15:46:27 +01001075 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1076 struct channel *ic = si_ic(si);
1077
Willy Tarreaude5722c2012-08-20 15:01:10 +02001078 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001079 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1080 !channel_is_empty(oc))
1081 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001082
Willy Tarreauafc8a222014-11-28 15:46:27 +01001083 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001084 /* Note: to prevent the client from expiring read timeouts
1085 * during writes, we refresh it. We only do this if the
1086 * interface is not configured for "independent streams",
1087 * because for some applications it's better not to do this,
1088 * for instance when continuously exchanging small amounts
1089 * of data which can full the socket buffers long before a
1090 * write timeout is detected.
1091 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001092 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001093 }
1094 }
1095
1096 /* in case of special condition (error, shutdown, end of write...), we
1097 * have to notify the task.
1098 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001099 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1100 ((oc->flags & CF_WAKE_WRITE) &&
1101 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreaue6300be2014-01-25 02:33:21 +01001102 si->state != SI_ST_EST)))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001103 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001104 if (!(si->flags & SI_FL_DONT_WAKE))
1105 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001106 }
Willy Tarreauf16723e2012-08-24 12:52:22 +02001107
1108 /* commit possible polling changes */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001109 cs_update_mux_polling(cs);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001110}
1111
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001112/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001113 * This is the callback which is called by the connection layer to receive data
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001114 * into the buffer from the connection. It iterates over the mux layer's
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001115 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001116 */
Olivier Houchardf6535282018-08-31 17:29:12 +02001117static int si_cs_recv(struct conn_stream *cs)
Willy Tarreauce323de2012-08-20 21:41:06 +02001118{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001119 struct connection *conn = cs->conn;
1120 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001121 struct channel *ic = si_ic(si);
Olivier Houchardf6535282018-08-31 17:29:12 +02001122 int ret, max, cur_read = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001123 int read_poll = MAX_READ_POLL_LOOPS;
1124
1125 /* stop immediately on errors. Note that we DON'T want to stop on
1126 * POLL_ERR, as the poller might report a write error while there
1127 * are still data available in the recv buffer. This typically
1128 * happens when we send too large a request to a backend server
1129 * which rejects it before reading it all.
1130 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001131 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001132 return 1; // We want to make sure si_cs_wake() is called, so that process_strema is woken up, on failure
Olivier Houchardf6535282018-08-31 17:29:12 +02001133
1134 /* If another call to si_cs_recv() failed, and we subscribed to
1135 * recv events already, give up now.
1136 */
1137 if (si->wait_list.wait_reason & SUB_CAN_RECV)
1138 return 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001139
Willy Tarreauce323de2012-08-20 21:41:06 +02001140 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001141 if (ic->flags & CF_SHUTR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001142 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001143
Willy Tarreau54e917c2017-08-30 07:35:35 +02001144 /* stop here if we reached the end of data */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001145 if (cs->flags & CS_FL_EOS)
Willy Tarreau54e917c2017-08-30 07:35:35 +02001146 goto out_shutdown_r;
1147
Willy Tarreau77e478c2018-06-19 07:03:14 +02001148 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !co_data(ic) &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001149 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001150 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001151 /* The buffer was empty and nothing was transferred for more
1152 * than one second. This was caused by a pause and not by
1153 * congestion. Reset any streaming mode to reduce latency.
1154 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001155 ic->xfer_small = 0;
1156 ic->xfer_large = 0;
1157 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001158 }
1159
Willy Tarreau96199b12012-08-24 00:46:52 +02001160 /* First, let's see if we may splice data across the channel without
1161 * using a buffer.
1162 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001163 if (conn->xprt->rcv_pipe && conn->mux->rcv_pipe &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001164 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1165 ic->flags & CF_KERN_SPLICING) {
Willy Tarreaud760eec2018-07-10 09:50:25 +02001166 if (c_data(ic)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001167 /* We're embarrassed, there are already data pending in
1168 * the buffer and we don't want to have them at two
1169 * locations at a time. Let's indicate we need some
1170 * place and ask the consumer to hurry.
1171 */
1172 goto abort_splice;
1173 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001174
Willy Tarreauafc8a222014-11-28 15:46:27 +01001175 if (unlikely(ic->pipe == NULL)) {
1176 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1177 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001178 goto abort_splice;
1179 }
1180 }
1181
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001182 ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001183 if (ret < 0) {
1184 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001185 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001186 goto abort_splice;
1187 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001188
Willy Tarreau96199b12012-08-24 00:46:52 +02001189 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001190 if (ic->to_forward != CHN_INFINITE_FORWARD)
1191 ic->to_forward -= ret;
1192 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001193 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001194 ic->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +02001195 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001196
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001197 if (cs->flags & CS_FL_EOS)
Willy Tarreau96199b12012-08-24 00:46:52 +02001198 goto out_shutdown_r;
1199
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001200 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001201 return 1;
Willy Tarreau96199b12012-08-24 00:46:52 +02001202
Willy Tarreau61d39a02013-07-18 21:49:32 +02001203 if (conn->flags & CO_FL_WAIT_ROOM) {
1204 /* the pipe is full or we have read enough data that it
1205 * could soon be full. Let's stop before needing to poll.
1206 */
Willy Tarreau56a77e52012-09-02 18:34:44 +02001207 si->flags |= SI_FL_WAIT_ROOM;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001208 __cs_stop_recv(cs);
Willy Tarreau61d39a02013-07-18 21:49:32 +02001209 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001210
Willy Tarreauce323de2012-08-20 21:41:06 +02001211 /* splice not possible (anymore), let's go on on standard copy */
1212 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001213
1214 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001215 if (ic->pipe && unlikely(!ic->pipe->data)) {
1216 put_pipe(ic->pipe);
1217 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001218 }
1219
Christopher Fauleta73e59b2016-12-09 17:30:18 +01001220 /* now we'll need a input buffer for the stream */
1221 if (!channel_alloc_buffer(ic, &(si_strm(si)->buffer_wait))) {
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001222 si->flags |= SI_FL_WAIT_ROOM;
1223 goto end_recv;
1224 }
1225
Willy Tarreau61d39a02013-07-18 21:49:32 +02001226 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1227 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1228 * that if such an event is not handled above in splice, it will be handled here by
1229 * recv().
1230 */
Christopher Faulet7c42eac2018-04-17 14:33:47 +02001231 while (!(conn->flags & (CO_FL_ERROR | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE)) &&
Willy Tarreaub78b80e2017-12-12 09:58:40 +01001232 !(cs->flags & (CS_FL_ERROR|CS_FL_EOS)) && !(ic->flags & CF_SHUTR)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001233 max = channel_recv_max(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001234
1235 if (!max) {
Willy Tarreau56a77e52012-09-02 18:34:44 +02001236 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreauce323de2012-08-20 21:41:06 +02001237 break;
1238 }
1239
Olivier Houchard511efea2018-08-16 15:30:32 +02001240 ret = cs->conn->mux->rcv_buf(cs, &ic->buf, max, co_data(ic) ? CO_RFL_BUF_WET : 0);
Willy Tarreau6577b482017-12-10 21:19:33 +01001241 if (cs->flags & CS_FL_RCV_MORE)
1242 si->flags |= SI_FL_WAIT_ROOM;
1243
Willy Tarreauce323de2012-08-20 21:41:06 +02001244 if (ret <= 0)
1245 break;
1246
1247 cur_read += ret;
1248
1249 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001250 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001251 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001252 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1253 if (fwd > ic->to_forward)
1254 fwd = ic->to_forward;
1255 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001256 }
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001257 c_adv(ic, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001258 }
1259
Willy Tarreauafc8a222014-11-28 15:46:27 +01001260 ic->flags |= CF_READ_PARTIAL;
1261 ic->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001262
Willy Tarreauafc8a222014-11-28 15:46:27 +01001263 if (!channel_may_recv(ic)) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001264 si->flags |= SI_FL_WAIT_ROOM;
1265 break;
1266 }
1267
Willy Tarreauafc8a222014-11-28 15:46:27 +01001268 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001269 /*
1270 * This used to be __conn_xprt_done_recv()
1271 * This was changed to accomodate with the mux code,
1272 * but we may have lost a worthwhile optimization.
1273 */
1274 __cs_stop_recv(cs);
Willy Tarreau62dd6982017-11-18 11:26:20 +01001275 si->flags |= SI_FL_WAIT_ROOM;
1276 break;
Willy Tarreau5fddab02012-11-09 18:27:26 +01001277 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001278
1279 /* if too many bytes were missing from last read, it means that
1280 * it's pointless trying to read again because the system does
1281 * not have them in buffers.
1282 */
1283 if (ret < max) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001284 /* if a streamer has read few data, it may be because we
1285 * have exhausted system buffers. It's not worth trying
1286 * again.
1287 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001288 if (ic->flags & CF_STREAMER)
Willy Tarreauce323de2012-08-20 21:41:06 +02001289 break;
1290
1291 /* if we read a large block smaller than what we requested,
1292 * it's almost certain we'll never get anything more.
1293 */
1294 if (ret >= global.tune.recv_enough)
1295 break;
1296 }
1297 } /* while !flags */
1298
Willy Tarreauc5890e62014-02-09 17:47:01 +01001299 if (cur_read) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001300 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001301 (cur_read <= ic->buf.size / 2)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001302 ic->xfer_large = 0;
1303 ic->xfer_small++;
1304 if (ic->xfer_small >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001305 /* we have read less than half of the buffer in
1306 * one pass, and this happened at least 3 times.
1307 * This is definitely not a streamer.
1308 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001309 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001310 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001311 else if (ic->xfer_small >= 2) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001312 /* if the buffer has been at least half full twice,
1313 * we receive faster than we send, so at least it
1314 * is not a "fast streamer".
1315 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001316 ic->flags &= ~CF_STREAMER_FAST;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001317 }
1318 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001319 else if (!(ic->flags & CF_STREAMER_FAST) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001320 (cur_read >= ic->buf.size - global.tune.maxrewrite)) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001321 /* we read a full buffer at once */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001322 ic->xfer_small = 0;
1323 ic->xfer_large++;
1324 if (ic->xfer_large >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001325 /* we call this buffer a fast streamer if it manages
1326 * to be filled in one call 3 consecutive times.
1327 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001328 ic->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001329 }
1330 }
1331 else {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001332 ic->xfer_small = 0;
1333 ic->xfer_large = 0;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001334 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001335 ic->last_read = now_ms;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001336 }
1337
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001338 end_recv:
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001339 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001340 return 1;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001341
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001342 if (cs->flags & CS_FL_EOS)
Willy Tarreauce323de2012-08-20 21:41:06 +02001343 /* connection closed */
1344 goto out_shutdown_r;
1345
Olivier Houchardf6535282018-08-31 17:29:12 +02001346 /* Subscribe to receive events */
1347 conn->mux->subscribe(cs, SUB_CAN_RECV, &si->wait_list);
1348
1349 return cur_read != 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001350
1351 out_shutdown_r:
1352 /* we received a shutdown */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001353 ic->flags |= CF_READ_NULL;
1354 if (ic->flags & CF_AUTO_CLOSE)
1355 channel_shutw_now(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001356 stream_sock_read0(si);
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001357 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001358}
1359
1360/*
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001361 * This function propagates a null read received on a socket-based connection.
1362 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001363 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001364 */
1365void stream_sock_read0(struct stream_interface *si)
1366{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001367 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001368 struct channel *ic = si_ic(si);
1369 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001370
Willy Tarreauafc8a222014-11-28 15:46:27 +01001371 ic->flags &= ~CF_SHUTR_NOW;
1372 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001373 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001374 ic->flags |= CF_SHUTR;
1375 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001376 si->flags &= ~SI_FL_WAIT_ROOM;
1377
1378 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1379 return;
1380
Willy Tarreauafc8a222014-11-28 15:46:27 +01001381 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001382 goto do_close;
1383
1384 if (si->flags & SI_FL_NOHALF) {
1385 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001386 /* force flag on ssl to keep stream in cache */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001387 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001388 goto do_close;
1389 }
1390
1391 /* otherwise that's just a normal read shutdown */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001392 __cs_stop_recv(cs);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001393 return;
1394
1395 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001396 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaua553ae92017-10-05 18:52:17 +02001397 cs_close(cs);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001398
Willy Tarreauafc8a222014-11-28 15:46:27 +01001399 oc->flags &= ~CF_SHUTW_NOW;
1400 oc->flags |= CF_SHUTW;
1401 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001402
1403 si->flags &= ~(SI_FL_WAIT_DATA | SI_FL_WAIT_ROOM);
1404
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001405 si->state = SI_ST_DIS;
1406 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001407 return;
1408}
1409
Willy Tarreau651e1822015-09-23 20:06:13 +02001410/* Callback to be used by applet handlers upon completion. It updates the stream
1411 * (which may or may not take this opportunity to try to forward data), then
Emeric Brun2802b072017-06-30 14:11:56 +02001412 * may re-enable the applet's based on the channels and stream interface's final
Willy Tarreau651e1822015-09-23 20:06:13 +02001413 * states.
1414 */
Willy Tarreauaa977ba2015-09-25 11:45:06 +02001415void si_applet_wake_cb(struct stream_interface *si)
Willy Tarreaue5f86492015-04-19 15:16:35 +02001416{
Willy Tarreaueca572f2015-09-25 19:11:55 +02001417 struct channel *ic = si_ic(si);
1418
1419 /* If the applet wants to write and the channel is closed, it's a
1420 * broken pipe and it must be reported.
1421 */
1422 if ((si->flags & SI_FL_WANT_PUT) && (ic->flags & CF_SHUTR))
1423 si->flags |= SI_FL_ERR;
1424
Willy Tarreau651e1822015-09-23 20:06:13 +02001425 /* update the stream-int, channels, and possibly wake the stream up */
1426 stream_int_notify(si);
Willy Tarreaue5f86492015-04-19 15:16:35 +02001427
Emeric Brun2802b072017-06-30 14:11:56 +02001428 /* stream_int_notify may pass throught checksnd and released some
1429 * WAIT_ROOM flags. The process_stream will consider those flags
1430 * to wakeup the appctx but in the case the task is not in runqueue
1431 * we may have to wakeup the appctx immediately.
1432 */
1433 if (!task_in_rq(si_task(si)))
1434 stream_int_update_applet(si);
1435}
Willy Tarreau452c7d52015-09-25 10:39:16 +02001436
1437/* Updates the activity status of an applet outside of the applet handler based
1438 * on the channel's flags and the stream interface's flags. It needs to be
1439 * called once after the channels' flags have settled down and the stream has
1440 * been updated. It is not designed to be called from within the applet handler
1441 * itself.
Willy Tarreau563cc372015-04-19 18:13:56 +02001442 */
1443void stream_int_update_applet(struct stream_interface *si)
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001444{
Willy Tarreaufe127932015-04-21 19:23:39 +02001445 if (((si->flags & (SI_FL_WANT_PUT|SI_FL_WAIT_ROOM)) == SI_FL_WANT_PUT) ||
1446 ((si->flags & (SI_FL_WANT_GET|SI_FL_WAIT_DATA)) == SI_FL_WANT_GET))
Willy Tarreau563cc372015-04-19 18:13:56 +02001447 appctx_wakeup(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001448}
1449
1450/*
1451 * This function performs a shutdown-read on a stream interface attached to an
1452 * applet in a connected or init state (it does nothing for other states). It
1453 * either shuts the read side or marks itself as closed. The buffer flags are
1454 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1455 * we also forward the close to the write side. The owner task is woken up if
1456 * it exists.
1457 */
1458static void stream_int_shutr_applet(struct stream_interface *si)
1459{
1460 struct channel *ic = si_ic(si);
1461
1462 ic->flags &= ~CF_SHUTR_NOW;
1463 if (ic->flags & CF_SHUTR)
1464 return;
1465 ic->flags |= CF_SHUTR;
1466 ic->rex = TICK_ETERNITY;
1467 si->flags &= ~SI_FL_WAIT_ROOM;
1468
Willy Tarreau828824a2015-04-19 17:20:03 +02001469 /* Note: on shutr, we don't call the applet */
1470
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001471 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1472 return;
1473
1474 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau958f0742015-09-25 20:24:26 +02001475 si_applet_release(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001476 si->state = SI_ST_DIS;
1477 si->exp = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001478 }
1479 else if (si->flags & SI_FL_NOHALF) {
1480 /* we want to immediately forward this close to the write side */
1481 return stream_int_shutw_applet(si);
1482 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001483}
1484
1485/*
1486 * This function performs a shutdown-write on a stream interface attached to an
1487 * applet in a connected or init state (it does nothing for other states). It
1488 * either shuts the write side or marks itself as closed. The buffer flags are
1489 * updated to reflect the new state. It does also close everything if the SI
1490 * was marked as being in error state. The owner task is woken up if it exists.
1491 */
1492static void stream_int_shutw_applet(struct stream_interface *si)
1493{
1494 struct channel *ic = si_ic(si);
1495 struct channel *oc = si_oc(si);
1496
1497 oc->flags &= ~CF_SHUTW_NOW;
1498 if (oc->flags & CF_SHUTW)
1499 return;
1500 oc->flags |= CF_SHUTW;
1501 oc->wex = TICK_ETERNITY;
1502 si->flags &= ~SI_FL_WAIT_DATA;
1503
Hongbo Longe39683c2017-03-10 18:41:51 +01001504 if (tick_isset(si->hcto)) {
1505 ic->rto = si->hcto;
1506 ic->rex = tick_add(now_ms, ic->rto);
1507 }
1508
Willy Tarreau828824a2015-04-19 17:20:03 +02001509 /* on shutw we always wake the applet up */
1510 appctx_wakeup(si_appctx(si));
1511
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001512 switch (si->state) {
1513 case SI_ST_EST:
1514 /* we have to shut before closing, otherwise some short messages
1515 * may never leave the system, especially when there are remaining
1516 * unread data in the socket input buffer, or when nolinger is set.
1517 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1518 * no risk so we close both sides immediately.
1519 */
1520 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1521 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1522 return;
1523
1524 /* fall through */
1525 case SI_ST_CON:
1526 case SI_ST_CER:
1527 case SI_ST_QUE:
1528 case SI_ST_TAR:
1529 /* Note that none of these states may happen with applets */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001530 si_applet_release(si);
Willy Tarreau958f0742015-09-25 20:24:26 +02001531 si->state = SI_ST_DIS;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001532 default:
1533 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
1534 ic->flags &= ~CF_SHUTR_NOW;
1535 ic->flags |= CF_SHUTR;
1536 ic->rex = TICK_ETERNITY;
1537 si->exp = TICK_ETERNITY;
1538 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001539}
1540
1541/* chk_rcv function for applets */
1542static void stream_int_chk_rcv_applet(struct stream_interface *si)
1543{
1544 struct channel *ic = si_ic(si);
1545
1546 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1547 __FUNCTION__,
1548 si, si->state, ic->flags, si_oc(si)->flags);
1549
1550 if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ))))
1551 return;
Willy Tarreau828824a2015-04-19 17:20:03 +02001552 /* here we only wake the applet up if it was waiting for some room */
1553 if (!(si->flags & SI_FL_WAIT_ROOM))
1554 return;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001555
Willy Tarreau828824a2015-04-19 17:20:03 +02001556 if (channel_may_recv(ic) && !ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001557 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001558 appctx_wakeup(si_appctx(si));
Thierry FOURNIER5bc2cbf2015-09-04 18:40:36 +02001559 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001560}
1561
1562/* chk_snd function for applets */
1563static void stream_int_chk_snd_applet(struct stream_interface *si)
1564{
1565 struct channel *oc = si_oc(si);
1566
1567 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1568 __FUNCTION__,
1569 si, si->state, si_ic(si)->flags, oc->flags);
1570
1571 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1572 return;
1573
Willy Tarreau828824a2015-04-19 17:20:03 +02001574 /* we only wake the applet up if it was waiting for some data */
1575
1576 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001577 return;
1578
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001579 if (!tick_isset(oc->wex))
1580 oc->wex = tick_add_ifset(now_ms, oc->wto);
1581
Willy Tarreau828824a2015-04-19 17:20:03 +02001582 if (!channel_is_empty(oc)) {
1583 /* (re)start sending */
1584 appctx_wakeup(si_appctx(si));
1585 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001586}
1587
Willy Tarreaudded32d2008-11-30 19:48:07 +01001588/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001589 * Local variables:
1590 * c-indent-level: 8
1591 * c-basic-offset: 8
1592 * End:
1593 */