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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);
Olivier Houchard9aaf7782017-09-13 18:30:23 +020055static int si_cs_wake_cb(struct conn_stream *cs);
56static int si_idle_conn_wake_cb(struct conn_stream *cs);
57static void si_idle_conn_null_cb(struct conn_stream *cs);
Olivier Houchard910b2bc2018-07-17 18:49:38 +020058static struct task * si_cs_send(struct task *t, void *ctx, unsigned short state);
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,
Olivier Houchard9aaf7782017-09-13 18:30:23 +020088 .wake = si_cs_wake_cb,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +010089 .name = "STRM",
Willy Tarreauc5788912012-08-24 18:12:41 +020090};
91
Willy Tarreau27375622013-12-17 00:00:28 +010092struct data_cb si_idle_conn_cb = {
93 .recv = si_idle_conn_null_cb,
Willy Tarreau27375622013-12-17 00:00:28 +010094 .wake = si_idle_conn_wake_cb,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +010095 .name = "IDLE",
Willy Tarreau27375622013-12-17 00:00:28 +010096};
97
Willy Tarreaucff64112008-11-03 06:26:53 +010098/*
99 * This function only has to be called once after a wakeup event in case of
100 * suspected timeout. It controls the stream interface timeouts and sets
101 * si->flags accordingly. It does NOT close anything, as this timeout may
102 * be used for any purpose. It returns 1 if the timeout fired, otherwise
103 * zero.
104 */
105int stream_int_check_timeouts(struct stream_interface *si)
106{
107 if (tick_is_expired(si->exp, now_ms)) {
108 si->flags |= SI_FL_EXP;
109 return 1;
110 }
111 return 0;
112}
113
Willy Tarreaufe3718a2008-11-30 18:14:12 +0100114/* to be called only when in SI_ST_DIS with SI_FL_ERR */
Willy Tarreaucff64112008-11-03 06:26:53 +0100115void stream_int_report_error(struct stream_interface *si)
116{
117 if (!si->err_type)
118 si->err_type = SI_ET_DATA_ERR;
119
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100120 si_oc(si)->flags |= CF_WRITE_ERROR;
121 si_ic(si)->flags |= CF_READ_ERROR;
Willy Tarreaucff64112008-11-03 06:26:53 +0100122}
123
124/*
Willy Tarreaudded32d2008-11-30 19:48:07 +0100125 * Returns a message to the client ; the connection is shut down for read,
126 * and the request is cleared so that no server connection can be initiated.
127 * The buffer is marked for read shutdown on the other side to protect the
128 * message, and the buffer write is enabled. The message is contained in a
Willy Tarreau148d0992010-01-10 10:21:21 +0100129 * "chunk". If it is null, then an empty message is used. The reply buffer does
130 * not need to be empty before this, and its contents will not be overwritten.
131 * The primary goal of this function is to return error messages to a client.
Willy Tarreaudded32d2008-11-30 19:48:07 +0100132 */
Willy Tarreau83061a82018-07-13 11:56:34 +0200133void stream_int_retnclose(struct stream_interface *si,
134 const struct buffer *msg)
Willy Tarreaudded32d2008-11-30 19:48:07 +0100135{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100136 struct channel *ic = si_ic(si);
137 struct channel *oc = si_oc(si);
138
139 channel_auto_read(ic);
140 channel_abort(ic);
141 channel_auto_close(ic);
142 channel_erase(ic);
143 channel_truncate(oc);
Willy Tarreau798e1282010-12-12 13:06:00 +0100144
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200145 if (likely(msg && msg->data))
146 co_inject(oc, msg->area, msg->data);
Willy Tarreaudded32d2008-11-30 19:48:07 +0100147
Willy Tarreauafc8a222014-11-28 15:46:27 +0100148 oc->wex = tick_add_ifset(now_ms, oc->wto);
149 channel_auto_read(oc);
150 channel_auto_close(oc);
151 channel_shutr_now(oc);
Willy Tarreau5d881d02009-12-27 22:51:06 +0100152}
153
Willy Tarreau4a36b562012-08-06 19:31:45 +0200154/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200155 * This function performs a shutdown-read on a detached stream interface in a
156 * connected or init state (it does nothing for other states). It either shuts
157 * the read side or marks itself as closed. The buffer flags are updated to
158 * reflect the new state. If the stream interface has SI_FL_NOHALF, we also
159 * forward the close to the write side. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200160 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200161static void stream_int_shutr(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200162{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100163 struct channel *ic = si_ic(si);
164
165 ic->flags &= ~CF_SHUTR_NOW;
166 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200167 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100168 ic->flags |= CF_SHUTR;
169 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200170 si->flags &= ~SI_FL_WAIT_ROOM;
171
172 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200173 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200174
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100175 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200176 si->state = SI_ST_DIS;
177 si->exp = TICK_ETERNITY;
Willy Tarreaud8ccffe2010-09-07 16:16:50 +0200178 }
Willy Tarreau4a36b562012-08-06 19:31:45 +0200179 else if (si->flags & SI_FL_NOHALF) {
180 /* we want to immediately forward this close to the write side */
181 return stream_int_shutw(si);
182 }
Willy Tarreau0bd05ea2010-07-02 11:18:03 +0200183
Willy Tarreau4a36b562012-08-06 19:31:45 +0200184 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100185 if (!(si->flags & SI_FL_DONT_WAKE))
186 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200187}
188
Willy Tarreau4a36b562012-08-06 19:31:45 +0200189/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200190 * This function performs a shutdown-write on a detached stream interface in a
191 * connected or init state (it does nothing for other states). It either shuts
192 * the write side or marks itself as closed. The buffer flags are updated to
193 * reflect the new state. It does also close everything if the SI was marked as
194 * being in error state. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200195 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200196static void stream_int_shutw(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200197{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100198 struct channel *ic = si_ic(si);
199 struct channel *oc = si_oc(si);
200
201 oc->flags &= ~CF_SHUTW_NOW;
202 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200203 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100204 oc->flags |= CF_SHUTW;
205 oc->wex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200206 si->flags &= ~SI_FL_WAIT_DATA;
207
Hongbo Longe39683c2017-03-10 18:41:51 +0100208 if (tick_isset(si->hcto)) {
209 ic->rto = si->hcto;
210 ic->rex = tick_add(now_ms, ic->rto);
211 }
212
Willy Tarreaufb90d942009-09-05 20:57:35 +0200213 switch (si->state) {
214 case SI_ST_EST:
Willy Tarreau4a36b562012-08-06 19:31:45 +0200215 /* we have to shut before closing, otherwise some short messages
216 * may never leave the system, especially when there are remaining
217 * unread data in the socket input buffer, or when nolinger is set.
218 * However, if SI_FL_NOLINGER is explicitly set, we know there is
219 * no risk so we close both sides immediately.
220 */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200221 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
Willy Tarreauafc8a222014-11-28 15:46:27 +0100222 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200223 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200224
225 /* fall through */
226 case SI_ST_CON:
227 case SI_ST_CER:
Willy Tarreau32d3ee92010-12-29 14:03:02 +0100228 case SI_ST_QUE:
229 case SI_ST_TAR:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200230 /* Note that none of these states may happen with applets */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200231 si->state = SI_ST_DIS;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200232 default:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200233 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100234 ic->flags &= ~CF_SHUTR_NOW;
235 ic->flags |= CF_SHUTR;
236 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200237 si->exp = TICK_ETERNITY;
238 }
239
Willy Tarreau4a36b562012-08-06 19:31:45 +0200240 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100241 if (!(si->flags & SI_FL_DONT_WAKE))
242 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200243}
244
245/* default chk_rcv function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200246static void stream_int_chk_rcv(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200247{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100248 struct channel *ic = si_ic(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200249
Willy Tarreauafc8a222014-11-28 15:46:27 +0100250 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200251 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100252 si, si->state, ic->flags, si_oc(si)->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200253
Willy Tarreauafc8a222014-11-28 15:46:27 +0100254 if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ))))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200255 return;
256
Willy Tarreauafc8a222014-11-28 15:46:27 +0100257 if (!channel_may_recv(ic) || ic->pipe) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200258 /* stop reading */
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +0200259 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200260 }
261 else {
262 /* (re)start reading */
263 si->flags &= ~SI_FL_WAIT_ROOM;
Willy Tarreau07373b82014-11-28 12:08:47 +0100264 if (!(si->flags & SI_FL_DONT_WAKE))
265 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200266 }
267}
268
269/* default chk_snd function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200270static void stream_int_chk_snd(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200271{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100272 struct channel *oc = si_oc(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200273
Willy Tarreauafc8a222014-11-28 15:46:27 +0100274 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200275 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100276 si, si->state, si_ic(si)->flags, oc->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200277
Willy Tarreauafc8a222014-11-28 15:46:27 +0100278 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200279 return;
280
281 if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100282 channel_is_empty(oc)) /* called with nothing to send ! */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200283 return;
284
285 /* Otherwise there are remaining data to be sent in the buffer,
286 * so we tell the handler.
287 */
288 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100289 if (!tick_isset(oc->wex))
290 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200291
Willy Tarreau07373b82014-11-28 12:08:47 +0100292 if (!(si->flags & SI_FL_DONT_WAKE))
293 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200294}
295
Willy Tarreaua9ff5e62015-07-19 18:46:30 +0200296/* Register an applet to handle a stream_interface as a new appctx. The SI will
297 * wake it up everytime it is solicited. The appctx must be deleted by the task
298 * handler using si_release_endpoint(), possibly from within the function itself.
299 * It also pre-initializes the applet's context and returns it (or NULL in case
300 * it could not be allocated).
Willy Tarreaufb90d942009-09-05 20:57:35 +0200301 */
Willy Tarreau30576452015-04-13 13:50:30 +0200302struct appctx *stream_int_register_handler(struct stream_interface *si, struct applet *app)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200303{
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100304 struct appctx *appctx;
305
Willy Tarreau07373b82014-11-28 12:08:47 +0100306 DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si_task(si));
Willy Tarreaufb90d942009-09-05 20:57:35 +0200307
Willy Tarreaua7513f52015-04-05 00:15:26 +0200308 appctx = si_alloc_appctx(si, app);
Willy Tarreaua69fc9f2014-12-22 19:34:00 +0100309 if (!appctx)
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100310 return NULL;
311
Willy Tarreaufe127932015-04-21 19:23:39 +0200312 si_applet_cant_get(si);
Willy Tarreau828824a2015-04-19 17:20:03 +0200313 appctx_wakeup(appctx);
Willy Tarreau1fbe1c92013-12-01 09:35:41 +0100314 return si_appctx(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200315}
316
Willy Tarreau2c6be842012-07-06 17:12:34 +0200317/* This callback is used to send a valid PROXY protocol line to a socket being
Willy Tarreauafad0e02012-08-09 14:45:22 +0200318 * established. It returns 0 if it fails in a fatal way or needs to poll to go
319 * further, otherwise it returns non-zero and removes itself from the connection's
Willy Tarreaua1a74742012-08-24 12:14:49 +0200320 * flags (the bit is provided in <flag> by the caller). It is designed to be
321 * called by the connection handler and relies on it to commit polling changes.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200322 * Note that it can emit a PROXY line by relying on the other end's address
323 * when the connection is attached to a stream interface, or by resolving the
324 * local address otherwise (also called a LOCAL line).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200325 */
326int conn_si_send_proxy(struct connection *conn, unsigned int flag)
327{
Willy Tarreau2c6be842012-07-06 17:12:34 +0200328 /* we might have been called just after an asynchronous shutw */
Willy Tarreaua1a74742012-08-24 12:14:49 +0200329 if (conn->flags & CO_FL_SOCK_WR_SH)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200330 goto out_error;
331
Willy Tarreaud02cdd22013-12-15 10:23:20 +0100332 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200333 goto out_error;
334
Willy Tarreau2c6be842012-07-06 17:12:34 +0200335 /* If we have a PROXY line to send, we'll use this to validate the
336 * connection, in which case the connection is validated only once
337 * we've sent the whole proxy line. Otherwise we use connect().
338 */
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200339 while (conn->send_proxy_ofs) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200340 struct conn_stream *cs;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200341 int ret;
342
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200343 cs = conn->mux_ctx;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200344 /* The target server expects a PROXY line to be sent first.
345 * If the send_proxy_ofs is negative, it corresponds to the
346 * offset to start sending from then end of the proxy string
347 * (which is recomputed every time since it's constant). If
348 * it is positive, it means we have to send from the start.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200349 * We can only send a "normal" PROXY line when the connection
350 * is attached to a stream interface. Otherwise we can only
351 * send a LOCAL line (eg: for use with health checks).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200352 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200353 if (conn->mux == &mux_pt_ops && cs->data_cb == &si_conn_cb) {
354 struct stream_interface *si = cs->data;
355 struct conn_stream *remote_cs = objt_cs(si_opposite(si)->end);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200356 ret = make_proxy_line(trash.area, trash.size,
357 objt_server(conn->target),
358 remote_cs ? remote_cs->conn : NULL);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200359 }
360 else {
361 /* The target server expects a LOCAL line to be sent first. Retrieving
362 * local or remote addresses may fail until the connection is established.
363 */
364 conn_get_from_addr(conn);
365 if (!(conn->flags & CO_FL_ADDR_FROM_SET))
366 goto out_wait;
367
368 conn_get_to_addr(conn);
369 if (!(conn->flags & CO_FL_ADDR_TO_SET))
370 goto out_wait;
371
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200372 ret = make_proxy_line(trash.area, trash.size,
373 objt_server(conn->target), conn);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200374 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200375
Willy Tarreau2c6be842012-07-06 17:12:34 +0200376 if (!ret)
377 goto out_error;
378
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200379 if (conn->send_proxy_ofs > 0)
380 conn->send_proxy_ofs = -ret; /* first call */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200381
Willy Tarreaua1a74742012-08-24 12:14:49 +0200382 /* we have to send trash from (ret+sp for -sp bytes). If the
383 * data layer has a pending write, we'll also set MSG_MORE.
384 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200385 ret = conn_sock_send(conn,
386 trash.area + ret + conn->send_proxy_ofs,
387 -conn->send_proxy_ofs,
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200388 (conn->flags & CO_FL_XPRT_WR_ENA) ? MSG_MORE : 0);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200389
Willy Tarreau0a03c0f2015-03-13 00:05:28 +0100390 if (ret < 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200391 goto out_error;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200392
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200393 conn->send_proxy_ofs += ret; /* becomes zero once complete */
394 if (conn->send_proxy_ofs != 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200395 goto out_wait;
396
397 /* OK we've sent the whole line, we're connected */
Willy Tarreau7fe45692013-12-04 23:37:56 +0100398 break;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200399 }
400
Willy Tarreaua1a74742012-08-24 12:14:49 +0200401 /* The connection is ready now, simply return and let the connection
402 * handler notify upper layers if needed.
Willy Tarreau2c6be842012-07-06 17:12:34 +0200403 */
404 if (conn->flags & CO_FL_WAIT_L4_CONN)
405 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200406 conn->flags &= ~flag;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200407 return 1;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200408
409 out_error:
Willy Tarreauafad0e02012-08-09 14:45:22 +0200410 /* Write error on the file descriptor */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200411 conn->flags |= CO_FL_ERROR;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200412 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200413
414 out_wait:
Willy Tarreaua1a74742012-08-24 12:14:49 +0200415 __conn_sock_stop_recv(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200416 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200417}
418
Willy Tarreau27375622013-12-17 00:00:28 +0100419
420/* Tiny I/O callback called on recv/send I/O events on idle connections.
421 * It simply sets the CO_FL_SOCK_RD_SH flag so that si_idle_conn_wake_cb()
422 * is notified and can kill the connection.
423 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200424static void si_idle_conn_null_cb(struct conn_stream *cs)
Willy Tarreau27375622013-12-17 00:00:28 +0100425{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200426 conn_sock_drain(cs->conn);
Willy Tarreau27375622013-12-17 00:00:28 +0100427}
428
429/* Callback to be used by connection I/O handlers when some activity is detected
430 * on an idle server connection. Its main purpose is to kill the connection once
431 * a close was detected on it. It returns 0 if it did nothing serious, or -1 if
432 * it killed the connection.
433 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200434static int si_idle_conn_wake_cb(struct conn_stream *cs)
Willy Tarreau27375622013-12-17 00:00:28 +0100435{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200436 struct connection *conn = cs->conn;
437 struct stream_interface *si = cs->data;
Willy Tarreau27375622013-12-17 00:00:28 +0100438
439 if (!conn_ctrl_ready(conn))
440 return 0;
441
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200442 if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH) || cs->flags & CS_FL_ERROR) {
Willy Tarreau27375622013-12-17 00:00:28 +0100443 /* warning, we can't do anything on <conn> after this call ! */
Willy Tarreauc4b56e42015-09-23 17:56:02 +0200444 si_release_endpoint(si);
Willy Tarreau27375622013-12-17 00:00:28 +0100445 return -1;
446 }
447 return 0;
448}
449
Willy Tarreau615f28b2015-09-23 18:40:09 +0200450/* This function is the equivalent to stream_int_update() except that it's
451 * designed to be called from outside the stream handlers, typically the lower
452 * layers (applets, connections) after I/O completion. After updating the stream
453 * interface and timeouts, it will try to forward what can be forwarded, then to
454 * wake the associated task up if an important event requires special handling.
455 * It should not be called from within the stream itself, stream_int_update()
456 * is designed for this.
457 */
458void stream_int_notify(struct stream_interface *si)
459{
460 struct channel *ic = si_ic(si);
461 struct channel *oc = si_oc(si);
462
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200463 /* If we have data to send, try it now */
464 if (!channel_is_empty(oc) && objt_cs(si->end))
465 si_cs_send(NULL, objt_cs(si->end), 0);
466
Willy Tarreau615f28b2015-09-23 18:40:09 +0200467 /* process consumer side */
468 if (channel_is_empty(oc)) {
Olivier Houcharde9bed532017-11-16 17:49:25 +0100469 struct connection *conn = objt_cs(si->end) ? objt_cs(si->end)->conn : NULL;
470
Willy Tarreau615f28b2015-09-23 18:40:09 +0200471 if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) &&
Olivier Houcharde9bed532017-11-16 17:49:25 +0100472 (si->state == SI_ST_EST) && (!conn || !(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS))))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200473 si_shutw(si);
474 oc->wex = TICK_ETERNITY;
475 }
476
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100477 /* indicate that we may be waiting for data from the output channel or
478 * we're about to close and can't expect more data if SHUTW_NOW is there.
479 */
Willy Tarreau615f28b2015-09-23 18:40:09 +0200480 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && channel_may_recv(oc))
481 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100482 else if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)
483 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200484
485 /* update OC timeouts and wake the other side up if it's waiting for room */
486 if (oc->flags & CF_WRITE_ACTIVITY) {
487 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
488 !channel_is_empty(oc))
489 if (tick_isset(oc->wex))
490 oc->wex = tick_add_ifset(now_ms, oc->wto);
491
492 if (!(si->flags & SI_FL_INDEP_STR))
493 if (tick_isset(ic->rex))
494 ic->rex = tick_add_ifset(now_ms, ic->rto);
495
496 if (likely((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL &&
497 channel_may_recv(oc) &&
498 (si_opposite(si)->flags & SI_FL_WAIT_ROOM)))
499 si_chk_rcv(si_opposite(si));
500 }
501
502 /* Notify the other side when we've injected data into the IC that
503 * needs to be forwarded. We can do fast-forwarding as soon as there
504 * are output data, but we avoid doing this if some of the data are
505 * not yet scheduled for being forwarded, because it is very likely
506 * that it will be done again immediately afterwards once the following
507 * data are parsed (eg: HTTP chunking). We only SI_FL_WAIT_ROOM once
508 * we've emptied *some* of the output buffer, and not just when there
509 * is available room, because applets are often forced to stop before
510 * the buffer is full. We must not stop based on input data alone because
511 * an HTTP parser might need more data to complete the parsing.
512 */
Bin Wang95fad5b2017-09-15 14:56:40 +0800513
514 /* ensure it's only set if a write attempt has succeeded */
515 ic->flags &= ~CF_WRITE_PARTIAL;
516
Willy Tarreau615f28b2015-09-23 18:40:09 +0200517 if (!channel_is_empty(ic) &&
518 (si_opposite(si)->flags & SI_FL_WAIT_DATA) &&
Willy Tarreau77e478c2018-06-19 07:03:14 +0200519 (ci_data(ic) == 0 || ic->pipe)) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200520 int new_len, last_len;
521
Willy Tarreau77e478c2018-06-19 07:03:14 +0200522 last_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200523 if (ic->pipe)
524 last_len += ic->pipe->data;
525
526 si_chk_snd(si_opposite(si));
527
Willy Tarreau77e478c2018-06-19 07:03:14 +0200528 new_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200529 if (ic->pipe)
530 new_len += ic->pipe->data;
531
532 /* check if the consumer has freed some space either in the
533 * buffer or in the pipe.
534 */
535 if (channel_may_recv(ic) && new_len < last_len)
536 si->flags &= ~SI_FL_WAIT_ROOM;
537 }
538
539 if (si->flags & SI_FL_WAIT_ROOM) {
540 ic->rex = TICK_ETERNITY;
541 }
542 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL &&
543 channel_may_recv(ic)) {
544 /* we must re-enable reading if si_chk_snd() has freed some space */
545 if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex))
546 ic->rex = tick_add_ifset(now_ms, ic->rto);
547 }
548
549 /* wake the task up only when needed */
550 if (/* changes on the production side */
551 (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
552 si->state != SI_ST_EST ||
553 (si->flags & SI_FL_ERR) ||
554 ((ic->flags & CF_READ_PARTIAL) &&
555 (!ic->to_forward || si_opposite(si)->state != SI_ST_EST)) ||
556
557 /* changes on the consumption side */
558 (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
Christopher Fauletc5a9d5b2017-11-09 09:36:43 +0100559 ((oc->flags & (CF_WRITE_ACTIVITY|CF_WRITE_EVENT)) &&
Willy Tarreau615f28b2015-09-23 18:40:09 +0200560 ((oc->flags & CF_SHUTW) ||
561 ((oc->flags & CF_WAKE_WRITE) &&
562 (si_opposite(si)->state != SI_ST_EST ||
563 (channel_is_empty(oc) && !oc->to_forward)))))) {
564 task_wakeup(si_task(si), TASK_WOKEN_IO);
565 }
566 if (ic->flags & CF_READ_ACTIVITY)
567 ic->flags &= ~CF_READ_DONTWAIT;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200568}
569
570
Willy Tarreau651e1822015-09-23 20:06:13 +0200571/* Callback to be used by connection I/O handlers upon completion. It propagates
572 * connection flags to the stream interface, updates the stream (which may or
573 * may not take this opportunity to try to forward data), then update the
574 * connection's polling based on the channels and stream interface's final
575 * states. The function always returns 0.
Willy Tarreau100c4672012-08-20 12:06:26 +0200576 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200577static int si_cs_wake_cb(struct conn_stream *cs)
Willy Tarreaufd31e532012-07-23 18:24:25 +0200578{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200579 struct connection *conn = cs->conn;
580 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100581 struct channel *ic = si_ic(si);
582 struct channel *oc = si_oc(si);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200583
Willy Tarreau67b1e782018-02-26 20:08:13 +0100584 /* if the CS's input buffer already has data available, let's try to
585 * receive now. The new muxes do this. The CS_FL_REOS is another cause
586 * for recv() (received only an empty response).
587 */
588 if (!(cs->flags & CS_FL_EOS) &&
589 (cs->flags & (CS_FL_DATA_RD_ENA|CS_FL_REOS|CS_FL_RCV_MORE)) > CS_FL_DATA_RD_ENA)
590 si_cs_recv_cb(cs);
591
Willy Tarreau651e1822015-09-23 20:06:13 +0200592 /* First step, report to the stream-int what was detected at the
593 * connection layer : errors and connection establishment.
594 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200595 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreau3c55ec22012-07-23 19:19:51 +0200596 si->flags |= SI_FL_ERR;
597
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200598 /* If we had early data, and the handshake ended, then
599 * we can remove the flag, and attempt to wake the task up,
600 * in the event there's an analyser waiting for the end of
601 * the handshake.
602 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +0100603 if (!(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS)) &&
604 (cs->flags & CS_FL_WAIT_FOR_HS)) {
605 cs->flags &= ~CS_FL_WAIT_FOR_HS;
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200606 task_wakeup(si_task(si), TASK_WOKEN_MSG);
607 }
608
Willy Tarreau52821e22017-03-18 17:11:37 +0100609 if ((si->state < SI_ST_EST) &&
610 (conn->flags & (CO_FL_CONNECTED | CO_FL_HANDSHAKE)) == CO_FL_CONNECTED) {
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200611 si->exp = TICK_ETERNITY;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100612 oc->flags |= CF_WRITE_NULL;
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200613 }
614
Willy Tarreau651e1822015-09-23 20:06:13 +0200615 /* Second step : update the stream-int and channels, try to forward any
616 * pending data, then possibly wake the stream up based on the new
617 * stream-int status.
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200618 */
Willy Tarreau651e1822015-09-23 20:06:13 +0200619 stream_int_notify(si);
Christopher Fauleta73e59b2016-12-09 17:30:18 +0100620 channel_release_buffer(ic, &(si_strm(si)->buffer_wait));
Willy Tarreauea3cc482015-09-23 19:37:00 +0200621
Willy Tarreau651e1822015-09-23 20:06:13 +0200622 /* Third step : update the connection's polling status based on what
623 * was done above (eg: maybe some buffers got emptied).
624 */
625 if (channel_is_empty(oc))
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200626 __cs_stop_send(cs);
Willy Tarreauea3cc482015-09-23 19:37:00 +0200627
Willy Tarreaufd31e532012-07-23 18:24:25 +0200628
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200629 if (si->flags & SI_FL_WAIT_ROOM) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200630 __cs_stop_recv(cs);
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200631 }
Willy Tarreauafc8a222014-11-28 15:46:27 +0100632 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ)) == CF_READ_PARTIAL &&
633 channel_may_recv(ic)) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200634 __cs_want_recv(cs);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200635 }
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200636 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200637}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200638
Willy Tarreau5368d802012-08-21 18:22:06 +0200639/*
640 * This function is called to send buffer data to a stream socket.
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200641 * It calls the mux layer's snd_buf function. It relies on the
Godbach4f489902013-12-04 17:24:06 +0800642 * caller to commit polling changes. The caller should check conn->flags
643 * for errors.
Willy Tarreau5368d802012-08-21 18:22:06 +0200644 */
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200645static struct task * si_cs_send(struct task *t, void *ctx, unsigned short state)
Willy Tarreau5368d802012-08-21 18:22:06 +0200646{
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200647 struct conn_stream *cs = ctx;
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200648 struct connection *conn = cs->conn;
649 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100650 struct channel *oc = si_oc(si);
Willy Tarreau5368d802012-08-21 18:22:06 +0200651 int ret;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200652 int did_send = 0;
653
654 /* We're already waiting to be able to send, give up */
655 if (!LIST_ISEMPTY(&cs->wait_list.list))
656 return NULL;
657
658 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
659 return NULL;
660
661 if (conn->flags & CO_FL_HANDSHAKE) {
662 /* a handshake was requested */
663 /* Schedule ourself to be woken up once the handshake is done */
664 LIST_ADDQ(&conn->send_wait_list, &cs->wait_list.list);
665 return NULL;
666 }
667
668 /* we might have been called just after an asynchronous shutw */
669 if (si_oc(si)->flags & CF_SHUTW)
670 return NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200671
Bin Wang95fad5b2017-09-15 14:56:40 +0800672 /* ensure it's only set if a write attempt has succeeded */
673 oc->flags &= ~CF_WRITE_PARTIAL;
674
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200675 if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) {
676 ret = conn->mux->snd_pipe(cs, oc->pipe);
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200677 if (ret > 0) {
Christopher Fauletc5a9d5b2017-11-09 09:36:43 +0100678 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA | CF_WRITE_EVENT;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200679 did_send = 1;
680 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200681
Willy Tarreauafc8a222014-11-28 15:46:27 +0100682 if (!oc->pipe->data) {
683 put_pipe(oc->pipe);
684 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200685 }
686
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200687 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200688 return NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200689 }
690
691 /* At this point, the pipe is empty, but we may still have data pending
692 * in the normal buffer.
693 */
Willy Tarreau77e478c2018-06-19 07:03:14 +0200694 if (!co_data(oc))
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200695 goto wake_others;
Willy Tarreau5368d802012-08-21 18:22:06 +0200696
Godbache68e02d2013-10-11 15:48:29 +0800697 /* when we're here, we already know that there is no spliced
Willy Tarreau5368d802012-08-21 18:22:06 +0200698 * data left, and that there are sendable buffered data.
699 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200700 if (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_HANDSHAKE)) &&
701 !(cs->flags & CS_FL_ERROR) && !(oc->flags & CF_SHUTW)) {
Willy Tarreau5368d802012-08-21 18:22:06 +0200702 /* check if we want to inform the kernel that we're interested in
703 * sending more data after this call. We want this if :
704 * - we're about to close after this last send and want to merge
705 * the ongoing FIN with the last segment.
706 * - we know we can't send everything at once and must get back
707 * here because of unaligned data
708 * - there is still a finite amount of data to forward
709 * The test is arranged so that the most common case does only 2
710 * tests.
711 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100712 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200713
Willy Tarreauafc8a222014-11-28 15:46:27 +0100714 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
715 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
Willy Tarreau4ac49282017-10-17 16:33:46 +0200716 (oc->flags & CF_EXPECT_MORE))) ||
Willy Tarreauecd2e152017-11-07 15:07:25 +0100717 ((oc->flags & CF_ISRESP) &&
718 ((oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW)) == (CF_AUTO_CLOSE|CF_SHUTW_NOW))))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100719 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200720
Willy Tarreauafc8a222014-11-28 15:46:27 +0100721 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100722 send_flag |= CO_SFL_STREAMER;
723
Willy Tarreauc9fa0482018-07-10 17:43:27 +0200724 ret = conn->mux->snd_buf(cs, &oc->buf, co_data(oc), send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800725 if (ret > 0) {
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200726 did_send = 1;
Christopher Fauletc5a9d5b2017-11-09 09:36:43 +0100727 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA | CF_WRITE_EVENT;
Willy Tarreau5368d802012-08-21 18:22:06 +0200728
Willy Tarreau77e478c2018-06-19 07:03:14 +0200729 co_set_data(oc, co_data(oc) - ret);
Willy Tarreaudeccd112018-06-14 18:38:55 +0200730 c_realign_if_empty(oc);
731
732 if (!co_data(oc)) {
Godbache68e02d2013-10-11 15:48:29 +0800733 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100734 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800735 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200736
Godbache68e02d2013-10-11 15:48:29 +0800737 /* if some data remain in the buffer, it's only because the
738 * system buffers are full, we will try next time.
739 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200740 }
Godbache68e02d2013-10-11 15:48:29 +0800741 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200742 /* We couldn't send all of our data, let the mux know we'd like to send more */
Willy Tarreau83188852018-07-18 08:18:20 +0200743 if (co_data(oc))
744 conn->mux->subscribe(cs, SUB_CAN_SEND, wl_set_waitcb(&cs->wait_list, si_cs_send, ctx));
745
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200746wake_others:
747 /* Maybe somebody was waiting for this conn_stream, wake them */
748 if (did_send) {
749 while (!LIST_ISEMPTY(&cs->send_wait_list)) {
750 struct wait_list *sw = LIST_ELEM(cs->send_wait_list.n,
751 struct wait_list *, list);
752 LIST_DEL(&sw->list);
753 LIST_INIT(&sw->list);
754 tasklet_wakeup(sw->task);
755 }
756 }
757 return NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200758}
759
Willy Tarreau25f13102015-09-24 11:32:22 +0200760/* This function is designed to be called from within the stream handler to
761 * update the channels' expiration timers and the stream interface's flags
762 * based on the channels' flags. It needs to be called only once after the
763 * channels' flags have settled down, and before they are cleared, though it
764 * doesn't harm to call it as often as desired (it just slightly hurts
765 * performance). It must not be called from outside of the stream handler,
766 * as what it does will be used to compute the stream task's expiration.
767 */
768void stream_int_update(struct stream_interface *si)
769{
770 struct channel *ic = si_ic(si);
771 struct channel *oc = si_oc(si);
772
773 if (!(ic->flags & CF_SHUTR)) {
774 /* Read not closed, update FD status and timeout for reads */
775 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
776 /* stop reading */
777 if (!(si->flags & SI_FL_WAIT_ROOM)) {
778 if (!(ic->flags & CF_DONT_READ)) /* full */
779 si->flags |= SI_FL_WAIT_ROOM;
780 ic->rex = TICK_ETERNITY;
781 }
782 }
Willy Tarreau171d5f22018-07-24 16:56:34 +0200783 else if (!(si->flags & SI_FL_WAIT_ROOM) || !co_data(ic)) {
Willy Tarreau25f13102015-09-24 11:32:22 +0200784 /* (re)start reading and update timeout. Note: we don't recompute the timeout
785 * everytime we get here, otherwise it would risk never to expire. We only
786 * update it if is was not yet set. The stream socket handler will already
787 * have updated it if there has been a completed I/O.
788 */
789 si->flags &= ~SI_FL_WAIT_ROOM;
790 if (!(ic->flags & (CF_READ_NOEXP|CF_DONT_READ)) && !tick_isset(ic->rex))
791 ic->rex = tick_add_ifset(now_ms, ic->rto);
792 }
793 }
794
795 if (!(oc->flags & CF_SHUTW)) {
796 /* Write not closed, update FD status and timeout for writes */
797 if (channel_is_empty(oc)) {
798 /* stop writing */
799 if (!(si->flags & SI_FL_WAIT_DATA)) {
800 if ((oc->flags & CF_SHUTW_NOW) == 0)
801 si->flags |= SI_FL_WAIT_DATA;
802 oc->wex = TICK_ETERNITY;
803 }
804 }
805 else {
806 /* (re)start writing and update timeout. Note: we don't recompute the timeout
807 * everytime we get here, otherwise it would risk never to expire. We only
808 * update it if is was not yet set. The stream socket handler will already
809 * have updated it if there has been a completed I/O.
810 */
811 si->flags &= ~SI_FL_WAIT_DATA;
812 if (!tick_isset(oc->wex)) {
813 oc->wex = tick_add_ifset(now_ms, oc->wto);
814 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
815 /* Note: depending on the protocol, we don't know if we're waiting
816 * for incoming data or not. So in order to prevent the socket from
817 * expiring read timeouts during writes, we refresh the read timeout,
818 * except if it was already infinite or if we have explicitly setup
819 * independent streams.
820 */
821 ic->rex = tick_add_ifset(now_ms, ic->rto);
822 }
823 }
824 }
825 }
826}
827
Willy Tarreau452c7d52015-09-25 10:39:16 +0200828/* Updates the polling status of a connection outside of the connection handler
829 * based on the channel's flags and the stream interface's flags. It needs to be
830 * called once after the channels' flags have settled down and the stream has
831 * been updated. It is not designed to be called from within the connection
832 * handler itself.
Willy Tarreau100c4672012-08-20 12:06:26 +0200833 */
834void stream_int_update_conn(struct stream_interface *si)
835{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100836 struct channel *ic = si_ic(si);
837 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200838 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreau100c4672012-08-20 12:06:26 +0200839
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200840 if (!(ic->flags & CF_SHUTR)) {
841 /* Read not closed */
842 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic))
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200843 __cs_stop_recv(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200844 else
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200845 __cs_want_recv(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200846 }
847
848 if (!(oc->flags & CF_SHUTW)) {
849 /* Write not closed */
850 if (channel_is_empty(oc))
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200851 __cs_stop_send(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200852 else
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200853 __cs_want_send(cs);
Willy Tarreau2f4e7022015-09-25 10:50:59 +0200854 }
855
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200856 cs_update_mux_polling(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200857}
858
859/*
860 * This function performs a shutdown-read on a stream interface attached to
861 * a connection in a connected or init state (it does nothing for other
862 * states). It either shuts the read side or marks itself as closed. The buffer
863 * flags are updated to reflect the new state. If the stream interface has
864 * SI_FL_NOHALF, we also forward the close to the write side. If a control
865 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +0200866 * descriptors are then shutdown or closed accordingly. The function
867 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200868 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200869static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200870{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200871 struct conn_stream *cs = __objt_cs(si->end);
872 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100873 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200874
Willy Tarreauafc8a222014-11-28 15:46:27 +0100875 ic->flags &= ~CF_SHUTR_NOW;
876 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200877 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100878 ic->flags |= CF_SHUTR;
879 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200880 si->flags &= ~SI_FL_WAIT_ROOM;
881
882 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200883 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200884
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100885 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaua553ae92017-10-05 18:52:17 +0200886 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200887 si->state = SI_ST_DIS;
888 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200889 }
890 else if (si->flags & SI_FL_NOHALF) {
891 /* we want to immediately forward this close to the write side */
892 return stream_int_shutw_conn(si);
893 }
894 else if (conn->ctrl) {
895 /* we want the caller to disable polling on this FD */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200896 cs_stop_recv(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200897 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200898}
899
900/*
901 * This function performs a shutdown-write on a stream interface attached to
902 * a connection in a connected or init state (it does nothing for other
903 * states). It either shuts the write side or marks itself as closed. The
904 * buffer flags are updated to reflect the new state. It does also close
905 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +0100906 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200907 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200908static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200909{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200910 struct conn_stream *cs = __objt_cs(si->end);
911 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100912 struct channel *ic = si_ic(si);
913 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200914
Willy Tarreauafc8a222014-11-28 15:46:27 +0100915 oc->flags &= ~CF_SHUTW_NOW;
916 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200917 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100918 oc->flags |= CF_SHUTW;
919 oc->wex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200920 si->flags &= ~SI_FL_WAIT_DATA;
921
Hongbo Longe39683c2017-03-10 18:41:51 +0100922 if (tick_isset(si->hcto)) {
923 ic->rto = si->hcto;
924 ic->rex = tick_add(now_ms, ic->rto);
925 }
926
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200927 switch (si->state) {
928 case SI_ST_EST:
929 /* we have to shut before closing, otherwise some short messages
930 * may never leave the system, especially when there are remaining
931 * unread data in the socket input buffer, or when nolinger is set.
932 * However, if SI_FL_NOLINGER is explicitly set, we know there is
933 * no risk so we close both sides immediately.
934 */
935 if (si->flags & SI_FL_ERR) {
936 /* quick close, the socket is alredy shut anyway */
937 }
938 else if (si->flags & SI_FL_NOLINGER) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200939 /* unclean data-layer shutdown, typically an aborted request
940 * or a forwarded shutdown from a client to a server due to
941 * option abortonclose. No need for the TLS layer to try to
942 * emit a shutdown message.
943 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200944 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200945 }
946 else {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200947 /* clean data-layer shutdown. This only happens on the
948 * frontend side, or on the backend side when forwarding
949 * a client close in TCP mode or in HTTP TUNNEL mode
950 * while option abortonclose is set. We want the TLS
951 * layer to try to signal it to the peer before we close.
952 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200953 cs_shutw(cs, CS_SHW_NORMAL);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200954
Willy Tarreaua553ae92017-10-05 18:52:17 +0200955 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
956 /* OK just a shutw, but we want the caller
957 * to disable polling on this FD if exists.
958 */
959 conn_cond_update_polling(conn);
960 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200961 }
962 }
963
964 /* fall through */
965 case SI_ST_CON:
966 /* we may have to close a pending connection, and mark the
967 * response buffer as shutr
968 */
Willy Tarreaua553ae92017-10-05 18:52:17 +0200969 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200970 /* fall through */
971 case SI_ST_CER:
972 case SI_ST_QUE:
973 case SI_ST_TAR:
974 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +0200975 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200976 default:
977 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100978 ic->flags &= ~CF_SHUTR_NOW;
979 ic->flags |= CF_SHUTR;
980 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200981 si->exp = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +0200982 }
983}
984
Willy Tarreau46a8d922012-08-20 12:38:36 +0200985/* This function is used for inter-stream-interface calls. It is called by the
986 * consumer to inform the producer side that it may be interested in checking
987 * for free space in the buffer. Note that it intentionally does not update
988 * timeouts, so that we can still check them later at wake-up. This function is
989 * dedicated to connection-based stream interfaces.
990 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200991static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +0200992{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100993 struct channel *ic = si_ic(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200994 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200995
Willy Tarreauafc8a222014-11-28 15:46:27 +0100996 if (unlikely(si->state > SI_ST_EST || (ic->flags & CF_SHUTR)))
Willy Tarreau46a8d922012-08-20 12:38:36 +0200997 return;
998
Willy Tarreauafc8a222014-11-28 15:46:27 +0100999 if ((ic->flags & CF_DONT_READ) || !channel_may_recv(ic)) {
Willy Tarreau46a8d922012-08-20 12:38:36 +02001000 /* stop reading */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001001 if (!(ic->flags & CF_DONT_READ)) /* full */
Willy Tarreau46a8d922012-08-20 12:38:36 +02001002 si->flags |= SI_FL_WAIT_ROOM;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001003 __cs_stop_recv(cs);
Willy Tarreau46a8d922012-08-20 12:38:36 +02001004 }
1005 else {
1006 /* (re)start reading */
1007 si->flags &= ~SI_FL_WAIT_ROOM;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001008 __cs_want_recv(cs);
Willy Tarreau46a8d922012-08-20 12:38:36 +02001009 }
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001010 cs_update_mux_polling(cs);
Willy Tarreau46a8d922012-08-20 12:38:36 +02001011}
1012
1013
Willy Tarreaude5722c2012-08-20 15:01:10 +02001014/* This function is used for inter-stream-interface calls. It is called by the
1015 * producer to inform the consumer side that it may be interested in checking
1016 * for data in the buffer. Note that it intentionally does not update timeouts,
1017 * so that we can still check them later at wake-up.
1018 */
Willy Tarreauc5788912012-08-24 18:12:41 +02001019static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001020{
Willy Tarreauafc8a222014-11-28 15:46:27 +01001021 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001022 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001023
Bin Wang95fad5b2017-09-15 14:56:40 +08001024 /* ensure it's only set if a write attempt has succeeded */
1025 oc->flags &= ~CF_WRITE_PARTIAL;
1026
Willy Tarreauafc8a222014-11-28 15:46:27 +01001027 if (unlikely(si->state > SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +02001028 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001029
Willy Tarreauafc8a222014-11-28 15:46:27 +01001030 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001031 return;
1032
Willy Tarreauafc8a222014-11-28 15:46:27 +01001033 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +01001034 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001035 return;
1036
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001037 if (cs->flags & CS_FL_DATA_WR_ENA) {
Willy Tarreau5007d2a2013-07-18 22:09:48 +02001038 /* already subscribed to write notifications, will be called
1039 * anyway, so let's avoid calling it especially if the reader
1040 * is not ready.
1041 */
1042 return;
1043 }
1044
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001045 __cs_want_send(cs);
Willy Tarreaud29a0662012-12-10 16:33:38 +01001046
Olivier Houchard910b2bc2018-07-17 18:49:38 +02001047 si_cs_send(NULL, cs, 0);
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001048 if (cs->flags & CS_FL_ERROR || cs->conn->flags & CO_FL_ERROR) {
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001049 /* Write error on the file descriptor */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001050 __cs_stop_both(cs);
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001051 si->flags |= SI_FL_ERR;
1052 goto out_wakeup;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001053 }
1054
1055 /* OK, so now we know that some data might have been sent, and that we may
1056 * have to poll first. We have to do that too if the buffer is not empty.
1057 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001058 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001059 /* the connection is established but we can't write. Either the
1060 * buffer is empty, or we just refrain from sending because the
1061 * ->o limit was reached. Maybe we just wrote the last
1062 * chunk and need to close.
1063 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001064 __cs_stop_send(cs);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001065 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001066 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreaude5722c2012-08-20 15:01:10 +02001067 (si->state == SI_ST_EST)) {
1068 si_shutw(si);
1069 goto out_wakeup;
1070 }
1071
Willy Tarreauafc8a222014-11-28 15:46:27 +01001072 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001073 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001074 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001075 }
1076 else {
1077 /* Otherwise there are remaining data to be sent in the buffer,
1078 * which means we have to poll before doing so.
1079 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001080 __cs_want_send(cs);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001081 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001082 if (!tick_isset(oc->wex))
1083 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001084 }
1085
Willy Tarreauafc8a222014-11-28 15:46:27 +01001086 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1087 struct channel *ic = si_ic(si);
1088
Willy Tarreaude5722c2012-08-20 15:01:10 +02001089 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001090 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1091 !channel_is_empty(oc))
1092 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001093
Willy Tarreauafc8a222014-11-28 15:46:27 +01001094 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001095 /* Note: to prevent the client from expiring read timeouts
1096 * during writes, we refresh it. We only do this if the
1097 * interface is not configured for "independent streams",
1098 * because for some applications it's better not to do this,
1099 * for instance when continuously exchanging small amounts
1100 * of data which can full the socket buffers long before a
1101 * write timeout is detected.
1102 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001103 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001104 }
1105 }
1106
1107 /* in case of special condition (error, shutdown, end of write...), we
1108 * have to notify the task.
1109 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001110 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1111 ((oc->flags & CF_WAKE_WRITE) &&
1112 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreaue6300be2014-01-25 02:33:21 +01001113 si->state != SI_ST_EST)))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001114 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001115 if (!(si->flags & SI_FL_DONT_WAKE))
1116 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001117 }
Willy Tarreauf16723e2012-08-24 12:52:22 +02001118
1119 /* commit possible polling changes */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001120 cs_update_mux_polling(cs);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001121}
1122
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001123/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001124 * This is the callback which is called by the connection layer to receive data
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001125 * into the buffer from the connection. It iterates over the mux layer's
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001126 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001127 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001128static void si_cs_recv_cb(struct conn_stream *cs)
Willy Tarreauce323de2012-08-20 21:41:06 +02001129{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001130 struct connection *conn = cs->conn;
1131 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001132 struct channel *ic = si_ic(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001133 int ret, max, cur_read;
1134 int read_poll = MAX_READ_POLL_LOOPS;
1135
1136 /* stop immediately on errors. Note that we DON'T want to stop on
1137 * POLL_ERR, as the poller might report a write error while there
1138 * are still data available in the recv buffer. This typically
1139 * happens when we send too large a request to a backend server
1140 * which rejects it before reading it all.
1141 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001142 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001143 return;
Willy Tarreauce323de2012-08-20 21:41:06 +02001144
Willy Tarreauce323de2012-08-20 21:41:06 +02001145 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001146 if (ic->flags & CF_SHUTR)
Willy Tarreauce323de2012-08-20 21:41:06 +02001147 return;
1148
Willy Tarreau54e917c2017-08-30 07:35:35 +02001149 /* stop here if we reached the end of data */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001150 if (cs->flags & CS_FL_EOS)
Willy Tarreau54e917c2017-08-30 07:35:35 +02001151 goto out_shutdown_r;
1152
Willy Tarreau96199b12012-08-24 00:46:52 +02001153 cur_read = 0;
Willy Tarreau96199b12012-08-24 00:46:52 +02001154
Willy Tarreau77e478c2018-06-19 07:03:14 +02001155 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !co_data(ic) &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001156 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001157 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001158 /* The buffer was empty and nothing was transferred for more
1159 * than one second. This was caused by a pause and not by
1160 * congestion. Reset any streaming mode to reduce latency.
1161 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001162 ic->xfer_small = 0;
1163 ic->xfer_large = 0;
1164 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001165 }
1166
Willy Tarreau96199b12012-08-24 00:46:52 +02001167 /* First, let's see if we may splice data across the channel without
1168 * using a buffer.
1169 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001170 if (conn->xprt->rcv_pipe && conn->mux->rcv_pipe &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001171 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1172 ic->flags & CF_KERN_SPLICING) {
Willy Tarreaud760eec2018-07-10 09:50:25 +02001173 if (c_data(ic)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001174 /* We're embarrassed, there are already data pending in
1175 * the buffer and we don't want to have them at two
1176 * locations at a time. Let's indicate we need some
1177 * place and ask the consumer to hurry.
1178 */
1179 goto abort_splice;
1180 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001181
Willy Tarreauafc8a222014-11-28 15:46:27 +01001182 if (unlikely(ic->pipe == NULL)) {
1183 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1184 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001185 goto abort_splice;
1186 }
1187 }
1188
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001189 ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001190 if (ret < 0) {
1191 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001192 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001193 goto abort_splice;
1194 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001195
Willy Tarreau96199b12012-08-24 00:46:52 +02001196 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001197 if (ic->to_forward != CHN_INFINITE_FORWARD)
1198 ic->to_forward -= ret;
1199 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001200 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001201 ic->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +02001202 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001203
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001204 if (cs->flags & CS_FL_EOS)
Willy Tarreau96199b12012-08-24 00:46:52 +02001205 goto out_shutdown_r;
1206
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001207 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Godbach4f489902013-12-04 17:24:06 +08001208 return;
Willy Tarreau96199b12012-08-24 00:46:52 +02001209
Willy Tarreau61d39a02013-07-18 21:49:32 +02001210 if (conn->flags & CO_FL_WAIT_ROOM) {
1211 /* the pipe is full or we have read enough data that it
1212 * could soon be full. Let's stop before needing to poll.
1213 */
Willy Tarreau56a77e52012-09-02 18:34:44 +02001214 si->flags |= SI_FL_WAIT_ROOM;
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001215 __cs_stop_recv(cs);
Willy Tarreau61d39a02013-07-18 21:49:32 +02001216 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001217
Willy Tarreauce323de2012-08-20 21:41:06 +02001218 /* splice not possible (anymore), let's go on on standard copy */
1219 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001220
1221 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001222 if (ic->pipe && unlikely(!ic->pipe->data)) {
1223 put_pipe(ic->pipe);
1224 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001225 }
1226
Christopher Fauleta73e59b2016-12-09 17:30:18 +01001227 /* now we'll need a input buffer for the stream */
1228 if (!channel_alloc_buffer(ic, &(si_strm(si)->buffer_wait))) {
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001229 si->flags |= SI_FL_WAIT_ROOM;
1230 goto end_recv;
1231 }
1232
Willy Tarreau61d39a02013-07-18 21:49:32 +02001233 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1234 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1235 * that if such an event is not handled above in splice, it will be handled here by
1236 * recv().
1237 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001238 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 +01001239 !(cs->flags & (CS_FL_ERROR|CS_FL_EOS)) && !(ic->flags & CF_SHUTR)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001240 max = channel_recv_max(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001241
1242 if (!max) {
Willy Tarreau56a77e52012-09-02 18:34:44 +02001243 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreauce323de2012-08-20 21:41:06 +02001244 break;
1245 }
1246
Willy Tarreau11c9aa42018-03-02 13:55:01 +01001247 ret = cs_recv(cs, &ic->buf, max, co_data(ic) ? CO_RFL_BUF_WET : 0);
Willy Tarreau6577b482017-12-10 21:19:33 +01001248 if (cs->flags & CS_FL_RCV_MORE)
1249 si->flags |= SI_FL_WAIT_ROOM;
1250
Willy Tarreauce323de2012-08-20 21:41:06 +02001251 if (ret <= 0)
1252 break;
1253
1254 cur_read += ret;
1255
1256 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001257 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001258 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001259 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1260 if (fwd > ic->to_forward)
1261 fwd = ic->to_forward;
1262 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001263 }
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001264 c_adv(ic, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001265 }
1266
Willy Tarreauafc8a222014-11-28 15:46:27 +01001267 ic->flags |= CF_READ_PARTIAL;
1268 ic->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001269
Willy Tarreauafc8a222014-11-28 15:46:27 +01001270 if (!channel_may_recv(ic)) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001271 si->flags |= SI_FL_WAIT_ROOM;
1272 break;
1273 }
1274
Willy Tarreauafc8a222014-11-28 15:46:27 +01001275 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001276 /*
1277 * This used to be __conn_xprt_done_recv()
1278 * This was changed to accomodate with the mux code,
1279 * but we may have lost a worthwhile optimization.
1280 */
1281 __cs_stop_recv(cs);
Willy Tarreau62dd6982017-11-18 11:26:20 +01001282 si->flags |= SI_FL_WAIT_ROOM;
1283 break;
Willy Tarreau5fddab02012-11-09 18:27:26 +01001284 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001285
1286 /* if too many bytes were missing from last read, it means that
1287 * it's pointless trying to read again because the system does
1288 * not have them in buffers.
1289 */
1290 if (ret < max) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001291 /* if a streamer has read few data, it may be because we
1292 * have exhausted system buffers. It's not worth trying
1293 * again.
1294 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001295 if (ic->flags & CF_STREAMER)
Willy Tarreauce323de2012-08-20 21:41:06 +02001296 break;
1297
1298 /* if we read a large block smaller than what we requested,
1299 * it's almost certain we'll never get anything more.
1300 */
1301 if (ret >= global.tune.recv_enough)
1302 break;
1303 }
1304 } /* while !flags */
1305
Willy Tarreauc5890e62014-02-09 17:47:01 +01001306 if (cur_read) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001307 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001308 (cur_read <= ic->buf.size / 2)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001309 ic->xfer_large = 0;
1310 ic->xfer_small++;
1311 if (ic->xfer_small >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001312 /* we have read less than half of the buffer in
1313 * one pass, and this happened at least 3 times.
1314 * This is definitely not a streamer.
1315 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001316 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001317 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001318 else if (ic->xfer_small >= 2) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001319 /* if the buffer has been at least half full twice,
1320 * we receive faster than we send, so at least it
1321 * is not a "fast streamer".
1322 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001323 ic->flags &= ~CF_STREAMER_FAST;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001324 }
1325 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001326 else if (!(ic->flags & CF_STREAMER_FAST) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001327 (cur_read >= ic->buf.size - global.tune.maxrewrite)) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001328 /* we read a full buffer at once */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001329 ic->xfer_small = 0;
1330 ic->xfer_large++;
1331 if (ic->xfer_large >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001332 /* we call this buffer a fast streamer if it manages
1333 * to be filled in one call 3 consecutive times.
1334 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001335 ic->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001336 }
1337 }
1338 else {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001339 ic->xfer_small = 0;
1340 ic->xfer_large = 0;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001341 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001342 ic->last_read = now_ms;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001343 }
1344
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001345 end_recv:
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001346 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001347 return;
1348
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001349 if (cs->flags & CS_FL_EOS)
Willy Tarreauce323de2012-08-20 21:41:06 +02001350 /* connection closed */
1351 goto out_shutdown_r;
1352
1353 return;
1354
1355 out_shutdown_r:
1356 /* we received a shutdown */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001357 ic->flags |= CF_READ_NULL;
1358 if (ic->flags & CF_AUTO_CLOSE)
1359 channel_shutw_now(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001360 stream_sock_read0(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001361 return;
Willy Tarreauce323de2012-08-20 21:41:06 +02001362}
1363
1364/*
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001365 * This function propagates a null read received on a socket-based connection.
1366 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001367 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001368 */
1369void stream_sock_read0(struct stream_interface *si)
1370{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001371 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001372 struct channel *ic = si_ic(si);
1373 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001374
Willy Tarreauafc8a222014-11-28 15:46:27 +01001375 ic->flags &= ~CF_SHUTR_NOW;
1376 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001377 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001378 ic->flags |= CF_SHUTR;
1379 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001380 si->flags &= ~SI_FL_WAIT_ROOM;
1381
1382 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1383 return;
1384
Willy Tarreauafc8a222014-11-28 15:46:27 +01001385 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001386 goto do_close;
1387
1388 if (si->flags & SI_FL_NOHALF) {
1389 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001390 /* force flag on ssl to keep stream in cache */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001391 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001392 goto do_close;
1393 }
1394
1395 /* otherwise that's just a normal read shutdown */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001396 __cs_stop_recv(cs);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001397 return;
1398
1399 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001400 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaua553ae92017-10-05 18:52:17 +02001401 cs_close(cs);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001402
Willy Tarreauafc8a222014-11-28 15:46:27 +01001403 oc->flags &= ~CF_SHUTW_NOW;
1404 oc->flags |= CF_SHUTW;
1405 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001406
1407 si->flags &= ~(SI_FL_WAIT_DATA | SI_FL_WAIT_ROOM);
1408
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001409 si->state = SI_ST_DIS;
1410 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001411 return;
1412}
1413
Willy Tarreau651e1822015-09-23 20:06:13 +02001414/* Callback to be used by applet handlers upon completion. It updates the stream
1415 * (which may or may not take this opportunity to try to forward data), then
Emeric Brun2802b072017-06-30 14:11:56 +02001416 * may re-enable the applet's based on the channels and stream interface's final
Willy Tarreau651e1822015-09-23 20:06:13 +02001417 * states.
1418 */
Willy Tarreauaa977ba2015-09-25 11:45:06 +02001419void si_applet_wake_cb(struct stream_interface *si)
Willy Tarreaue5f86492015-04-19 15:16:35 +02001420{
Willy Tarreaueca572f2015-09-25 19:11:55 +02001421 struct channel *ic = si_ic(si);
1422
1423 /* If the applet wants to write and the channel is closed, it's a
1424 * broken pipe and it must be reported.
1425 */
1426 if ((si->flags & SI_FL_WANT_PUT) && (ic->flags & CF_SHUTR))
1427 si->flags |= SI_FL_ERR;
1428
Willy Tarreau651e1822015-09-23 20:06:13 +02001429 /* update the stream-int, channels, and possibly wake the stream up */
1430 stream_int_notify(si);
Willy Tarreaue5f86492015-04-19 15:16:35 +02001431
Emeric Brun2802b072017-06-30 14:11:56 +02001432 /* stream_int_notify may pass throught checksnd and released some
1433 * WAIT_ROOM flags. The process_stream will consider those flags
1434 * to wakeup the appctx but in the case the task is not in runqueue
1435 * we may have to wakeup the appctx immediately.
1436 */
1437 if (!task_in_rq(si_task(si)))
1438 stream_int_update_applet(si);
1439}
Willy Tarreau452c7d52015-09-25 10:39:16 +02001440
1441/* Updates the activity status of an applet outside of the applet handler based
1442 * on the channel's flags and the stream interface's flags. It needs to be
1443 * called once after the channels' flags have settled down and the stream has
1444 * been updated. It is not designed to be called from within the applet handler
1445 * itself.
Willy Tarreau563cc372015-04-19 18:13:56 +02001446 */
1447void stream_int_update_applet(struct stream_interface *si)
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001448{
Willy Tarreaufe127932015-04-21 19:23:39 +02001449 if (((si->flags & (SI_FL_WANT_PUT|SI_FL_WAIT_ROOM)) == SI_FL_WANT_PUT) ||
1450 ((si->flags & (SI_FL_WANT_GET|SI_FL_WAIT_DATA)) == SI_FL_WANT_GET))
Willy Tarreau563cc372015-04-19 18:13:56 +02001451 appctx_wakeup(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001452}
1453
1454/*
1455 * This function performs a shutdown-read on a stream interface attached to an
1456 * applet in a connected or init state (it does nothing for other states). It
1457 * either shuts the read side or marks itself as closed. The buffer flags are
1458 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1459 * we also forward the close to the write side. The owner task is woken up if
1460 * it exists.
1461 */
1462static void stream_int_shutr_applet(struct stream_interface *si)
1463{
1464 struct channel *ic = si_ic(si);
1465
1466 ic->flags &= ~CF_SHUTR_NOW;
1467 if (ic->flags & CF_SHUTR)
1468 return;
1469 ic->flags |= CF_SHUTR;
1470 ic->rex = TICK_ETERNITY;
1471 si->flags &= ~SI_FL_WAIT_ROOM;
1472
Willy Tarreau828824a2015-04-19 17:20:03 +02001473 /* Note: on shutr, we don't call the applet */
1474
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001475 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1476 return;
1477
1478 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau958f0742015-09-25 20:24:26 +02001479 si_applet_release(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001480 si->state = SI_ST_DIS;
1481 si->exp = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001482 }
1483 else if (si->flags & SI_FL_NOHALF) {
1484 /* we want to immediately forward this close to the write side */
1485 return stream_int_shutw_applet(si);
1486 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001487}
1488
1489/*
1490 * This function performs a shutdown-write on a stream interface attached to an
1491 * applet in a connected or init state (it does nothing for other states). It
1492 * either shuts the write side or marks itself as closed. The buffer flags are
1493 * updated to reflect the new state. It does also close everything if the SI
1494 * was marked as being in error state. The owner task is woken up if it exists.
1495 */
1496static void stream_int_shutw_applet(struct stream_interface *si)
1497{
1498 struct channel *ic = si_ic(si);
1499 struct channel *oc = si_oc(si);
1500
1501 oc->flags &= ~CF_SHUTW_NOW;
1502 if (oc->flags & CF_SHUTW)
1503 return;
1504 oc->flags |= CF_SHUTW;
1505 oc->wex = TICK_ETERNITY;
1506 si->flags &= ~SI_FL_WAIT_DATA;
1507
Hongbo Longe39683c2017-03-10 18:41:51 +01001508 if (tick_isset(si->hcto)) {
1509 ic->rto = si->hcto;
1510 ic->rex = tick_add(now_ms, ic->rto);
1511 }
1512
Willy Tarreau828824a2015-04-19 17:20:03 +02001513 /* on shutw we always wake the applet up */
1514 appctx_wakeup(si_appctx(si));
1515
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001516 switch (si->state) {
1517 case SI_ST_EST:
1518 /* we have to shut before closing, otherwise some short messages
1519 * may never leave the system, especially when there are remaining
1520 * unread data in the socket input buffer, or when nolinger is set.
1521 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1522 * no risk so we close both sides immediately.
1523 */
1524 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1525 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1526 return;
1527
1528 /* fall through */
1529 case SI_ST_CON:
1530 case SI_ST_CER:
1531 case SI_ST_QUE:
1532 case SI_ST_TAR:
1533 /* Note that none of these states may happen with applets */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001534 si_applet_release(si);
Willy Tarreau958f0742015-09-25 20:24:26 +02001535 si->state = SI_ST_DIS;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001536 default:
1537 si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
1538 ic->flags &= ~CF_SHUTR_NOW;
1539 ic->flags |= CF_SHUTR;
1540 ic->rex = TICK_ETERNITY;
1541 si->exp = TICK_ETERNITY;
1542 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001543}
1544
1545/* chk_rcv function for applets */
1546static void stream_int_chk_rcv_applet(struct stream_interface *si)
1547{
1548 struct channel *ic = si_ic(si);
1549
1550 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1551 __FUNCTION__,
1552 si, si->state, ic->flags, si_oc(si)->flags);
1553
1554 if (unlikely(si->state != SI_ST_EST || (ic->flags & (CF_SHUTR|CF_DONT_READ))))
1555 return;
Willy Tarreau828824a2015-04-19 17:20:03 +02001556 /* here we only wake the applet up if it was waiting for some room */
1557 if (!(si->flags & SI_FL_WAIT_ROOM))
1558 return;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001559
Willy Tarreau828824a2015-04-19 17:20:03 +02001560 if (channel_may_recv(ic) && !ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001561 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001562 appctx_wakeup(si_appctx(si));
Thierry FOURNIER5bc2cbf2015-09-04 18:40:36 +02001563 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001564}
1565
1566/* chk_snd function for applets */
1567static void stream_int_chk_snd_applet(struct stream_interface *si)
1568{
1569 struct channel *oc = si_oc(si);
1570
1571 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1572 __FUNCTION__,
1573 si, si->state, si_ic(si)->flags, oc->flags);
1574
1575 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1576 return;
1577
Willy Tarreau828824a2015-04-19 17:20:03 +02001578 /* we only wake the applet up if it was waiting for some data */
1579
1580 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001581 return;
1582
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001583 if (!tick_isset(oc->wex))
1584 oc->wex = tick_add_ifset(now_ms, oc->wto);
1585
Willy Tarreau828824a2015-04-19 17:20:03 +02001586 if (!channel_is_empty(oc)) {
1587 /* (re)start sending */
1588 appctx_wakeup(si_appctx(si));
1589 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001590}
1591
Willy Tarreaudded32d2008-11-30 19:48:07 +01001592/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001593 * Local variables:
1594 * c-indent-level: 8
1595 * c-basic-offset: 8
1596 * End:
1597 */