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Willy Tarreaucff64112008-11-03 06:26:53 +01001/*
2 * Functions managing stream_interface structures
3 *
Willy Tarreauf873d752012-05-11 17:47:17 +02004 * Copyright 2000-2012 Willy Tarreau <w@1wt.eu>
Willy Tarreaucff64112008-11-03 06:26:53 +01005 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13#include <errno.h>
14#include <fcntl.h>
15#include <stdio.h>
16#include <stdlib.h>
17
18#include <sys/socket.h>
19#include <sys/stat.h>
20#include <sys/types.h>
21
Willy Tarreaubf883e02014-11-25 21:10:35 +010022#include <common/buffer.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010023#include <common/compat.h>
24#include <common/config.h>
25#include <common/debug.h>
26#include <common/standard.h>
27#include <common/ticks.h>
28#include <common/time.h>
29
Willy Tarreau8a8d83b2015-04-13 13:24:54 +020030#include <proto/applet.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020031#include <proto/channel.h>
Willy Tarreau8b117082012-08-06 15:06:49 +020032#include <proto/connection.h>
Olivier Houchard9aaf7782017-09-13 18:30:23 +020033#include <proto/mux_pt.h>
Willy Tarreau96199b12012-08-24 00:46:52 +020034#include <proto/pipe.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020035#include <proto/stream.h>
Willy Tarreau269358d2009-09-20 20:14:49 +020036#include <proto/stream_interface.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010037#include <proto/task.h>
38
Willy Tarreaufd31e532012-07-23 18:24:25 +020039#include <types/pipe.h>
40
Willy Tarreauf873d752012-05-11 17:47:17 +020041/* socket functions used when running a stream interface as a task */
Willy Tarreau6fe15412013-09-29 15:16:03 +020042static void stream_int_shutr(struct stream_interface *si);
43static void stream_int_shutw(struct stream_interface *si);
Willy Tarreauf873d752012-05-11 17:47:17 +020044static void stream_int_chk_rcv(struct stream_interface *si);
45static void stream_int_chk_snd(struct stream_interface *si);
Willy Tarreau6fe15412013-09-29 15:16:03 +020046static void stream_int_shutr_conn(struct stream_interface *si);
47static void stream_int_shutw_conn(struct stream_interface *si);
Willy Tarreauc5788912012-08-24 18:12:41 +020048static void stream_int_chk_rcv_conn(struct stream_interface *si);
49static void stream_int_chk_snd_conn(struct stream_interface *si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +020050static void stream_int_shutr_applet(struct stream_interface *si);
51static void stream_int_shutw_applet(struct stream_interface *si);
52static void stream_int_chk_rcv_applet(struct stream_interface *si);
53static void stream_int_chk_snd_applet(struct stream_interface *si);
Olivier Houchard0e367bb2018-09-14 19:41:13 +020054int si_cs_recv(struct conn_stream *cs);
Olivier Houchardc2aa7112018-09-11 18:27:21 +020055static int si_cs_process(struct conn_stream *cs);
Olivier Houchard0e367bb2018-09-14 19:41:13 +020056int si_cs_send(struct conn_stream *cs);
Willy Tarreauf873d752012-05-11 17:47:17 +020057
Willy Tarreauc5788912012-08-24 18:12:41 +020058/* stream-interface operations for embedded tasks */
59struct si_ops si_embedded_ops = {
Willy Tarreau5c979a92012-05-07 17:15:39 +020060 .chk_rcv = stream_int_chk_rcv,
61 .chk_snd = stream_int_chk_snd,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020062 .shutr = stream_int_shutr,
63 .shutw = stream_int_shutw,
Willy Tarreau5c979a92012-05-07 17:15:39 +020064};
65
Willy Tarreauc5788912012-08-24 18:12:41 +020066/* stream-interface operations for connections */
67struct si_ops si_conn_ops = {
Willy Tarreauc5788912012-08-24 18:12:41 +020068 .chk_rcv = stream_int_chk_rcv_conn,
69 .chk_snd = stream_int_chk_snd_conn,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020070 .shutr = stream_int_shutr_conn,
71 .shutw = stream_int_shutw_conn,
Willy Tarreauc5788912012-08-24 18:12:41 +020072};
73
Willy Tarreaud45b9f82015-04-13 16:30:14 +020074/* stream-interface operations for connections */
75struct si_ops si_applet_ops = {
Willy Tarreaud45b9f82015-04-13 16:30:14 +020076 .chk_rcv = stream_int_chk_rcv_applet,
77 .chk_snd = stream_int_chk_snd_applet,
78 .shutr = stream_int_shutr_applet,
79 .shutw = stream_int_shutw_applet,
80};
81
Willy Tarreau74beec32012-10-03 00:41:04 +020082struct data_cb si_conn_cb = {
Olivier Houchard21df6cc2018-09-14 23:21:44 +020083 .wake = si_cs_process,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +010084 .name = "STRM",
Willy Tarreauc5788912012-08-24 18:12:41 +020085};
86
Willy Tarreaucff64112008-11-03 06:26:53 +010087/*
88 * This function only has to be called once after a wakeup event in case of
89 * suspected timeout. It controls the stream interface timeouts and sets
90 * si->flags accordingly. It does NOT close anything, as this timeout may
91 * be used for any purpose. It returns 1 if the timeout fired, otherwise
92 * zero.
93 */
94int stream_int_check_timeouts(struct stream_interface *si)
95{
96 if (tick_is_expired(si->exp, now_ms)) {
97 si->flags |= SI_FL_EXP;
98 return 1;
99 }
100 return 0;
101}
102
Willy Tarreaufe3718a2008-11-30 18:14:12 +0100103/* to be called only when in SI_ST_DIS with SI_FL_ERR */
Willy Tarreaucff64112008-11-03 06:26:53 +0100104void stream_int_report_error(struct stream_interface *si)
105{
106 if (!si->err_type)
107 si->err_type = SI_ET_DATA_ERR;
108
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100109 si_oc(si)->flags |= CF_WRITE_ERROR;
110 si_ic(si)->flags |= CF_READ_ERROR;
Willy Tarreaucff64112008-11-03 06:26:53 +0100111}
112
113/*
Willy Tarreaudded32d2008-11-30 19:48:07 +0100114 * Returns a message to the client ; the connection is shut down for read,
115 * and the request is cleared so that no server connection can be initiated.
116 * The buffer is marked for read shutdown on the other side to protect the
117 * message, and the buffer write is enabled. The message is contained in a
Willy Tarreau148d0992010-01-10 10:21:21 +0100118 * "chunk". If it is null, then an empty message is used. The reply buffer does
119 * not need to be empty before this, and its contents will not be overwritten.
120 * The primary goal of this function is to return error messages to a client.
Willy Tarreaudded32d2008-11-30 19:48:07 +0100121 */
Willy Tarreau83061a82018-07-13 11:56:34 +0200122void stream_int_retnclose(struct stream_interface *si,
123 const struct buffer *msg)
Willy Tarreaudded32d2008-11-30 19:48:07 +0100124{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100125 struct channel *ic = si_ic(si);
126 struct channel *oc = si_oc(si);
127
128 channel_auto_read(ic);
129 channel_abort(ic);
130 channel_auto_close(ic);
131 channel_erase(ic);
132 channel_truncate(oc);
Willy Tarreau798e1282010-12-12 13:06:00 +0100133
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200134 if (likely(msg && msg->data))
135 co_inject(oc, msg->area, msg->data);
Willy Tarreaudded32d2008-11-30 19:48:07 +0100136
Willy Tarreauafc8a222014-11-28 15:46:27 +0100137 oc->wex = tick_add_ifset(now_ms, oc->wto);
138 channel_auto_read(oc);
139 channel_auto_close(oc);
140 channel_shutr_now(oc);
Willy Tarreau5d881d02009-12-27 22:51:06 +0100141}
142
Willy Tarreau4a36b562012-08-06 19:31:45 +0200143/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200144 * This function performs a shutdown-read on a detached stream interface in a
145 * connected or init state (it does nothing for other states). It either shuts
146 * the read side or marks itself as closed. The buffer flags are updated to
147 * reflect the new state. If the stream interface has SI_FL_NOHALF, we also
148 * forward the close to the write side. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200149 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200150static void stream_int_shutr(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200151{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100152 struct channel *ic = si_ic(si);
153
Willy Tarreauabb5d422018-11-14 16:58:52 +0100154 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100155 ic->flags &= ~CF_SHUTR_NOW;
156 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200157 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100158 ic->flags |= CF_SHUTR;
159 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200160
161 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200162 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200163
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100164 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200165 si->state = SI_ST_DIS;
166 si->exp = TICK_ETERNITY;
Willy Tarreaud8ccffe2010-09-07 16:16:50 +0200167 }
Willy Tarreau4a36b562012-08-06 19:31:45 +0200168 else if (si->flags & SI_FL_NOHALF) {
169 /* we want to immediately forward this close to the write side */
170 return stream_int_shutw(si);
171 }
Willy Tarreau0bd05ea2010-07-02 11:18:03 +0200172
Willy Tarreau4a36b562012-08-06 19:31:45 +0200173 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100174 if (!(si->flags & SI_FL_DONT_WAKE))
175 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200176}
177
Willy Tarreau4a36b562012-08-06 19:31:45 +0200178/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200179 * This function performs a shutdown-write on a detached stream interface in a
180 * connected or init state (it does nothing for other states). It either shuts
181 * the write side or marks itself as closed. The buffer flags are updated to
182 * reflect the new state. It does also close everything if the SI was marked as
183 * being in error state. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200184 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200185static void stream_int_shutw(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200186{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100187 struct channel *ic = si_ic(si);
188 struct channel *oc = si_oc(si);
189
190 oc->flags &= ~CF_SHUTW_NOW;
191 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200192 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100193 oc->flags |= CF_SHUTW;
194 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +0100195 si_done_get(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200196
Hongbo Longe39683c2017-03-10 18:41:51 +0100197 if (tick_isset(si->hcto)) {
198 ic->rto = si->hcto;
199 ic->rex = tick_add(now_ms, ic->rto);
200 }
201
Willy Tarreaufb90d942009-09-05 20:57:35 +0200202 switch (si->state) {
203 case SI_ST_EST:
Willy Tarreau4a36b562012-08-06 19:31:45 +0200204 /* we have to shut before closing, otherwise some short messages
205 * may never leave the system, especially when there are remaining
206 * unread data in the socket input buffer, or when nolinger is set.
207 * However, if SI_FL_NOLINGER is explicitly set, we know there is
208 * no risk so we close both sides immediately.
209 */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200210 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
Willy Tarreauafc8a222014-11-28 15:46:27 +0100211 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200212 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200213
214 /* fall through */
215 case SI_ST_CON:
216 case SI_ST_CER:
Willy Tarreau32d3ee92010-12-29 14:03:02 +0100217 case SI_ST_QUE:
218 case SI_ST_TAR:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200219 /* Note that none of these states may happen with applets */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200220 si->state = SI_ST_DIS;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200221 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +0100222 si->flags &= ~SI_FL_NOLINGER;
223 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100224 ic->flags &= ~CF_SHUTR_NOW;
225 ic->flags |= CF_SHUTR;
226 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200227 si->exp = TICK_ETERNITY;
228 }
229
Willy Tarreau4a36b562012-08-06 19:31:45 +0200230 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100231 if (!(si->flags & SI_FL_DONT_WAKE))
232 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200233}
234
235/* default chk_rcv function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200236static void stream_int_chk_rcv(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200237{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100238 struct channel *ic = si_ic(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200239
Willy Tarreauafc8a222014-11-28 15:46:27 +0100240 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200241 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100242 si, si->state, ic->flags, si_oc(si)->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200243
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200244 if (ic->pipe) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200245 /* stop reading */
Willy Tarreaudb398432018-11-15 11:08:52 +0100246 si_rx_room_blk(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200247 }
248 else {
249 /* (re)start reading */
Olivier Houchard53216e72018-10-10 15:46:36 +0200250 tasklet_wakeup(si->wait_event.task);
Willy Tarreau07373b82014-11-28 12:08:47 +0100251 if (!(si->flags & SI_FL_DONT_WAKE))
252 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200253 }
254}
255
256/* default chk_snd function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200257static void stream_int_chk_snd(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200258{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100259 struct channel *oc = si_oc(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200260
Willy Tarreauafc8a222014-11-28 15:46:27 +0100261 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200262 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100263 si, si->state, si_ic(si)->flags, oc->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200264
Willy Tarreauafc8a222014-11-28 15:46:27 +0100265 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200266 return;
267
268 if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100269 channel_is_empty(oc)) /* called with nothing to send ! */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200270 return;
271
272 /* Otherwise there are remaining data to be sent in the buffer,
273 * so we tell the handler.
274 */
275 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100276 if (!tick_isset(oc->wex))
277 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200278
Willy Tarreau07373b82014-11-28 12:08:47 +0100279 if (!(si->flags & SI_FL_DONT_WAKE))
280 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200281}
282
Willy Tarreaua9ff5e62015-07-19 18:46:30 +0200283/* Register an applet to handle a stream_interface as a new appctx. The SI will
284 * wake it up everytime it is solicited. The appctx must be deleted by the task
285 * handler using si_release_endpoint(), possibly from within the function itself.
286 * It also pre-initializes the applet's context and returns it (or NULL in case
287 * it could not be allocated).
Willy Tarreaufb90d942009-09-05 20:57:35 +0200288 */
Willy Tarreau30576452015-04-13 13:50:30 +0200289struct appctx *stream_int_register_handler(struct stream_interface *si, struct applet *app)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200290{
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100291 struct appctx *appctx;
292
Willy Tarreau07373b82014-11-28 12:08:47 +0100293 DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si_task(si));
Willy Tarreaufb90d942009-09-05 20:57:35 +0200294
Willy Tarreaua7513f52015-04-05 00:15:26 +0200295 appctx = si_alloc_appctx(si, app);
Willy Tarreaua69fc9f2014-12-22 19:34:00 +0100296 if (!appctx)
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100297 return NULL;
298
Willy Tarreau0cd3bd62018-11-06 18:46:37 +0100299 si_cant_get(si);
Willy Tarreau828824a2015-04-19 17:20:03 +0200300 appctx_wakeup(appctx);
Willy Tarreau1fbe1c92013-12-01 09:35:41 +0100301 return si_appctx(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200302}
303
Willy Tarreau2c6be842012-07-06 17:12:34 +0200304/* This callback is used to send a valid PROXY protocol line to a socket being
Willy Tarreauafad0e02012-08-09 14:45:22 +0200305 * established. It returns 0 if it fails in a fatal way or needs to poll to go
306 * further, otherwise it returns non-zero and removes itself from the connection's
Willy Tarreaua1a74742012-08-24 12:14:49 +0200307 * flags (the bit is provided in <flag> by the caller). It is designed to be
308 * called by the connection handler and relies on it to commit polling changes.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200309 * Note that it can emit a PROXY line by relying on the other end's address
310 * when the connection is attached to a stream interface, or by resolving the
311 * local address otherwise (also called a LOCAL line).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200312 */
313int conn_si_send_proxy(struct connection *conn, unsigned int flag)
314{
Willy Tarreau2c6be842012-07-06 17:12:34 +0200315 /* we might have been called just after an asynchronous shutw */
Willy Tarreaua1a74742012-08-24 12:14:49 +0200316 if (conn->flags & CO_FL_SOCK_WR_SH)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200317 goto out_error;
318
Willy Tarreaud02cdd22013-12-15 10:23:20 +0100319 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200320 goto out_error;
321
Willy Tarreau2c6be842012-07-06 17:12:34 +0200322 /* If we have a PROXY line to send, we'll use this to validate the
323 * connection, in which case the connection is validated only once
324 * we've sent the whole proxy line. Otherwise we use connect().
325 */
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200326 while (conn->send_proxy_ofs) {
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100327 const struct conn_stream *cs;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200328 int ret;
329
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100330 cs = cs_get_first(conn);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200331 /* The target server expects a PROXY line to be sent first.
332 * If the send_proxy_ofs is negative, it corresponds to the
333 * offset to start sending from then end of the proxy string
334 * (which is recomputed every time since it's constant). If
335 * it is positive, it means we have to send from the start.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200336 * We can only send a "normal" PROXY line when the connection
337 * is attached to a stream interface. Otherwise we can only
338 * send a LOCAL line (eg: for use with health checks).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200339 */
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100340
341 if (cs && cs->data_cb == &si_conn_cb) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200342 struct stream_interface *si = cs->data;
343 struct conn_stream *remote_cs = objt_cs(si_opposite(si)->end);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200344 ret = make_proxy_line(trash.area, trash.size,
345 objt_server(conn->target),
346 remote_cs ? remote_cs->conn : NULL);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200347 }
348 else {
349 /* The target server expects a LOCAL line to be sent first. Retrieving
350 * local or remote addresses may fail until the connection is established.
351 */
352 conn_get_from_addr(conn);
353 if (!(conn->flags & CO_FL_ADDR_FROM_SET))
354 goto out_wait;
355
356 conn_get_to_addr(conn);
357 if (!(conn->flags & CO_FL_ADDR_TO_SET))
358 goto out_wait;
359
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200360 ret = make_proxy_line(trash.area, trash.size,
361 objt_server(conn->target), conn);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200362 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200363
Willy Tarreau2c6be842012-07-06 17:12:34 +0200364 if (!ret)
365 goto out_error;
366
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200367 if (conn->send_proxy_ofs > 0)
368 conn->send_proxy_ofs = -ret; /* first call */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200369
Willy Tarreaua1a74742012-08-24 12:14:49 +0200370 /* we have to send trash from (ret+sp for -sp bytes). If the
371 * data layer has a pending write, we'll also set MSG_MORE.
372 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200373 ret = conn_sock_send(conn,
374 trash.area + ret + conn->send_proxy_ofs,
375 -conn->send_proxy_ofs,
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200376 (conn->flags & CO_FL_XPRT_WR_ENA) ? MSG_MORE : 0);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200377
Willy Tarreau0a03c0f2015-03-13 00:05:28 +0100378 if (ret < 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200379 goto out_error;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200380
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200381 conn->send_proxy_ofs += ret; /* becomes zero once complete */
382 if (conn->send_proxy_ofs != 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200383 goto out_wait;
384
385 /* OK we've sent the whole line, we're connected */
Willy Tarreau7fe45692013-12-04 23:37:56 +0100386 break;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200387 }
388
Willy Tarreaua1a74742012-08-24 12:14:49 +0200389 /* The connection is ready now, simply return and let the connection
390 * handler notify upper layers if needed.
Willy Tarreau2c6be842012-07-06 17:12:34 +0200391 */
392 if (conn->flags & CO_FL_WAIT_L4_CONN)
393 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200394 conn->flags &= ~flag;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200395 return 1;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200396
397 out_error:
Willy Tarreauafad0e02012-08-09 14:45:22 +0200398 /* Write error on the file descriptor */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200399 conn->flags |= CO_FL_ERROR;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200400 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200401
402 out_wait:
Willy Tarreaua1a74742012-08-24 12:14:49 +0200403 __conn_sock_stop_recv(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200404 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200405}
406
Willy Tarreau27375622013-12-17 00:00:28 +0100407
Willy Tarreau615f28b2015-09-23 18:40:09 +0200408/* This function is the equivalent to stream_int_update() except that it's
409 * designed to be called from outside the stream handlers, typically the lower
410 * layers (applets, connections) after I/O completion. After updating the stream
411 * interface and timeouts, it will try to forward what can be forwarded, then to
412 * wake the associated task up if an important event requires special handling.
Willy Tarreaud0f5bbc2018-11-14 11:10:26 +0100413 * It may update SI_FL_WAIT_DATA and/or SI_FL_RXBLK_ROOM, that the callers are
Willy Tarreau0dfccb22018-10-25 13:55:20 +0200414 * encouraged to watch to take appropriate action.
Willy Tarreau615f28b2015-09-23 18:40:09 +0200415 * It should not be called from within the stream itself, stream_int_update()
416 * is designed for this.
417 */
418void stream_int_notify(struct stream_interface *si)
419{
420 struct channel *ic = si_ic(si);
421 struct channel *oc = si_oc(si);
Willy Tarreau47baeb82018-11-15 07:46:57 +0100422 struct stream_interface *sio = si_opposite(si);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200423
424 /* process consumer side */
425 if (channel_is_empty(oc)) {
Olivier Houcharde9bed532017-11-16 17:49:25 +0100426 struct connection *conn = objt_cs(si->end) ? objt_cs(si->end)->conn : NULL;
427
Willy Tarreau615f28b2015-09-23 18:40:09 +0200428 if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) &&
Olivier Houcharde9bed532017-11-16 17:49:25 +0100429 (si->state == SI_ST_EST) && (!conn || !(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS))))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200430 si_shutw(si);
431 oc->wex = TICK_ETERNITY;
432 }
433
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100434 /* indicate that we may be waiting for data from the output channel or
435 * we're about to close and can't expect more data if SHUTW_NOW is there.
436 */
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200437 if (!(oc->flags & (CF_SHUTW|CF_SHUTW_NOW)))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200438 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100439 else if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)
440 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200441
442 /* update OC timeouts and wake the other side up if it's waiting for room */
443 if (oc->flags & CF_WRITE_ACTIVITY) {
444 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
445 !channel_is_empty(oc))
446 if (tick_isset(oc->wex))
447 oc->wex = tick_add_ifset(now_ms, oc->wto);
448
449 if (!(si->flags & SI_FL_INDEP_STR))
450 if (tick_isset(ic->rex))
451 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreauf26c26c2018-11-12 16:11:08 +0100452 }
Willy Tarreau615f28b2015-09-23 18:40:09 +0200453
Willy Tarreau47baeb82018-11-15 07:46:57 +0100454 if ((sio->flags & SI_FL_RXBLK_ROOM) &&
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100455 ((oc->flags & CF_WRITE_PARTIAL) || channel_is_empty(oc)))
Willy Tarreaudb398432018-11-15 11:08:52 +0100456 si_rx_room_rdy(sio);
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100457
458 if (oc->flags & CF_DONT_READ)
459 si_rx_chan_blk(sio);
460 else
461 si_rx_chan_rdy(sio);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200462
463 /* Notify the other side when we've injected data into the IC that
464 * needs to be forwarded. We can do fast-forwarding as soon as there
465 * are output data, but we avoid doing this if some of the data are
466 * not yet scheduled for being forwarded, because it is very likely
467 * that it will be done again immediately afterwards once the following
Willy Tarreaud0f5bbc2018-11-14 11:10:26 +0100468 * data are parsed (eg: HTTP chunking). We only SI_FL_RXBLK_ROOM once
Willy Tarreau615f28b2015-09-23 18:40:09 +0200469 * we've emptied *some* of the output buffer, and not just when there
470 * is available room, because applets are often forced to stop before
471 * the buffer is full. We must not stop based on input data alone because
472 * an HTTP parser might need more data to complete the parsing.
473 */
474 if (!channel_is_empty(ic) &&
Willy Tarreau47baeb82018-11-15 07:46:57 +0100475 (sio->flags & SI_FL_WAIT_DATA) &&
Willy Tarreau89b6a2b2018-11-18 15:46:10 +0100476 (!(ic->flags & CF_EXPECT_MORE) || c_full(ic) || ci_data(ic) == 0 || ic->pipe)) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200477 int new_len, last_len;
478
Willy Tarreau77e478c2018-06-19 07:03:14 +0200479 last_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200480 if (ic->pipe)
481 last_len += ic->pipe->data;
482
Willy Tarreau47baeb82018-11-15 07:46:57 +0100483 si_chk_snd(sio);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200484
Willy Tarreau77e478c2018-06-19 07:03:14 +0200485 new_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200486 if (ic->pipe)
487 new_len += ic->pipe->data;
488
489 /* check if the consumer has freed some space either in the
490 * buffer or in the pipe.
491 */
Willy Tarreau47baeb82018-11-15 07:46:57 +0100492 if (new_len < last_len)
Willy Tarreaudb398432018-11-15 11:08:52 +0100493 si_rx_room_rdy(si);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200494 }
495
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100496 if (!(ic->flags & CF_DONT_READ))
497 si_rx_chan_rdy(si);
498
Willy Tarreau47baeb82018-11-15 07:46:57 +0100499 si_chk_rcv(si);
500 si_chk_rcv(sio);
501
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100502 if (si_rx_blocked(si)) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200503 ic->rex = TICK_ETERNITY;
504 }
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100505 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL)) == CF_READ_PARTIAL) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200506 /* we must re-enable reading if si_chk_snd() has freed some space */
507 if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex))
508 ic->rex = tick_add_ifset(now_ms, ic->rto);
509 }
510
511 /* wake the task up only when needed */
512 if (/* changes on the production side */
513 (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
Willy Tarreaub69f1712018-11-08 14:32:16 +0100514 (si->state != SI_ST_EST && si->state != SI_ST_CON) ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200515 (si->flags & SI_FL_ERR) ||
516 ((ic->flags & CF_READ_PARTIAL) &&
Willy Tarreau47baeb82018-11-15 07:46:57 +0100517 (!ic->to_forward || sio->state != SI_ST_EST)) ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200518
519 /* changes on the consumption side */
520 (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
Willy Tarreauede3d882018-10-24 17:17:56 +0200521 ((oc->flags & CF_WRITE_ACTIVITY) &&
Willy Tarreau615f28b2015-09-23 18:40:09 +0200522 ((oc->flags & CF_SHUTW) ||
523 ((oc->flags & CF_WAKE_WRITE) &&
Willy Tarreau47baeb82018-11-15 07:46:57 +0100524 (sio->state != SI_ST_EST ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200525 (channel_is_empty(oc) && !oc->to_forward)))))) {
526 task_wakeup(si_task(si), TASK_WOKEN_IO);
527 }
528 if (ic->flags & CF_READ_ACTIVITY)
529 ic->flags &= ~CF_READ_DONTWAIT;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200530}
531
532
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200533/* Called by I/O handlers after completion.. It propagates
Willy Tarreau651e1822015-09-23 20:06:13 +0200534 * connection flags to the stream interface, updates the stream (which may or
535 * may not take this opportunity to try to forward data), then update the
536 * connection's polling based on the channels and stream interface's final
537 * states. The function always returns 0.
Willy Tarreau100c4672012-08-20 12:06:26 +0200538 */
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200539static int si_cs_process(struct conn_stream *cs)
Willy Tarreaufd31e532012-07-23 18:24:25 +0200540{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200541 struct connection *conn = cs->conn;
542 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100543 struct channel *ic = si_ic(si);
544 struct channel *oc = si_oc(si);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200545
Olivier Houchardc7ffa912018-08-28 19:37:41 +0200546 /* If we have data to send, try it now */
Willy Tarreau908d26f2018-10-25 14:02:47 +0200547 if (!channel_is_empty(oc) && !(si->wait_event.wait_reason & SUB_CAN_SEND))
548 si_cs_send(cs);
549
Willy Tarreau651e1822015-09-23 20:06:13 +0200550 /* First step, report to the stream-int what was detected at the
551 * connection layer : errors and connection establishment.
552 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200553 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreau3c55ec22012-07-23 19:19:51 +0200554 si->flags |= SI_FL_ERR;
555
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200556 /* If we had early data, and the handshake ended, then
557 * we can remove the flag, and attempt to wake the task up,
558 * in the event there's an analyser waiting for the end of
559 * the handshake.
560 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +0100561 if (!(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS)) &&
562 (cs->flags & CS_FL_WAIT_FOR_HS)) {
563 cs->flags &= ~CS_FL_WAIT_FOR_HS;
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200564 task_wakeup(si_task(si), TASK_WOKEN_MSG);
565 }
566
Willy Tarreau52821e22017-03-18 17:11:37 +0100567 if ((si->state < SI_ST_EST) &&
568 (conn->flags & (CO_FL_CONNECTED | CO_FL_HANDSHAKE)) == CO_FL_CONNECTED) {
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200569 si->exp = TICK_ETERNITY;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100570 oc->flags |= CF_WRITE_NULL;
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200571 }
572
Willy Tarreau651e1822015-09-23 20:06:13 +0200573 /* Second step : update the stream-int and channels, try to forward any
574 * pending data, then possibly wake the stream up based on the new
575 * stream-int status.
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200576 */
Willy Tarreau651e1822015-09-23 20:06:13 +0200577 stream_int_notify(si);
Christopher Fauleta73e59b2016-12-09 17:30:18 +0100578 channel_release_buffer(ic, &(si_strm(si)->buffer_wait));
Willy Tarreauea3cc482015-09-23 19:37:00 +0200579
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200580 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200581}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200582
Willy Tarreau5368d802012-08-21 18:22:06 +0200583/*
584 * This function is called to send buffer data to a stream socket.
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200585 * It calls the mux layer's snd_buf function. It relies on the
Godbach4f489902013-12-04 17:24:06 +0800586 * caller to commit polling changes. The caller should check conn->flags
587 * for errors.
Willy Tarreau5368d802012-08-21 18:22:06 +0200588 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +0200589int si_cs_send(struct conn_stream *cs)
Willy Tarreau5368d802012-08-21 18:22:06 +0200590{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200591 struct connection *conn = cs->conn;
592 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100593 struct channel *oc = si_oc(si);
Willy Tarreau5368d802012-08-21 18:22:06 +0200594 int ret;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200595 int did_send = 0;
596
597 /* We're already waiting to be able to send, give up */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200598 if (si->wait_event.wait_reason & SUB_CAN_SEND)
Olivier Houchardf6535282018-08-31 17:29:12 +0200599 return 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200600
601 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200602 return 1;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200603
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200604 /* we might have been called just after an asynchronous shutw */
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100605 if (conn->flags & CO_FL_SOCK_WR_SH || oc->flags & CF_SHUTW)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200606 return 1;
Willy Tarreau5368d802012-08-21 18:22:06 +0200607
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200608 if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) {
609 ret = conn->mux->snd_pipe(cs, oc->pipe);
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200610 if (ret > 0) {
Willy Tarreauede3d882018-10-24 17:17:56 +0200611 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200612 did_send = 1;
613 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200614
Willy Tarreauafc8a222014-11-28 15:46:27 +0100615 if (!oc->pipe->data) {
616 put_pipe(oc->pipe);
617 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200618 }
619
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200620 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Christopher Faulet5ed7aab2018-11-19 22:02:07 +0100621 return 1;
Christopher Faulet3f76f4c2018-11-20 10:21:08 +0100622
623 if (oc->pipe)
624 goto end;
Willy Tarreau5368d802012-08-21 18:22:06 +0200625 }
626
627 /* At this point, the pipe is empty, but we may still have data pending
628 * in the normal buffer.
629 */
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100630 if (co_data(oc)) {
631 /* when we're here, we already know that there is no spliced
632 * data left, and that there are sendable buffered data.
633 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200634
Willy Tarreau5368d802012-08-21 18:22:06 +0200635 /* check if we want to inform the kernel that we're interested in
636 * sending more data after this call. We want this if :
637 * - we're about to close after this last send and want to merge
638 * the ongoing FIN with the last segment.
639 * - we know we can't send everything at once and must get back
640 * here because of unaligned data
641 * - there is still a finite amount of data to forward
642 * The test is arranged so that the most common case does only 2
643 * tests.
644 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100645 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200646
Willy Tarreauafc8a222014-11-28 15:46:27 +0100647 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
648 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
Willy Tarreau4ac49282017-10-17 16:33:46 +0200649 (oc->flags & CF_EXPECT_MORE))) ||
Willy Tarreauecd2e152017-11-07 15:07:25 +0100650 ((oc->flags & CF_ISRESP) &&
651 ((oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW)) == (CF_AUTO_CLOSE|CF_SHUTW_NOW))))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100652 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200653
Willy Tarreauafc8a222014-11-28 15:46:27 +0100654 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100655 send_flag |= CO_SFL_STREAMER;
656
Olivier Houcharded0f2072018-08-16 15:41:52 +0200657 ret = cs->conn->mux->snd_buf(cs, &oc->buf, co_data(oc), send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800658 if (ret > 0) {
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200659 did_send = 1;
Willy Tarreauede3d882018-10-24 17:17:56 +0200660 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Willy Tarreau5368d802012-08-21 18:22:06 +0200661
Willy Tarreau77e478c2018-06-19 07:03:14 +0200662 co_set_data(oc, co_data(oc) - ret);
Willy Tarreaudeccd112018-06-14 18:38:55 +0200663 c_realign_if_empty(oc);
664
665 if (!co_data(oc)) {
Godbache68e02d2013-10-11 15:48:29 +0800666 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100667 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800668 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200669
Godbache68e02d2013-10-11 15:48:29 +0800670 /* if some data remain in the buffer, it's only because the
671 * system buffers are full, we will try next time.
672 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200673 }
Christopher Faulete4acd5e2018-11-20 09:34:35 +0100674
675 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
676 return 1;
Godbache68e02d2013-10-11 15:48:29 +0800677 }
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100678
Willy Tarreauf6975aa2018-11-15 14:33:05 +0100679 end:
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200680 /* We couldn't send all of our data, let the mux know we'd like to send more */
Willy Tarreau691fe392018-11-12 18:48:52 +0100681 if (!channel_is_empty(oc))
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200682 conn->mux->subscribe(cs, SUB_CAN_SEND, &si->wait_event);
Olivier Houchardf6535282018-08-31 17:29:12 +0200683 return did_send;
Willy Tarreau5368d802012-08-21 18:22:06 +0200684}
685
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100686/* This is the ->process() function for any stream-interface's wait_event task.
687 * It's assigned during the stream-interface's initialization, for any type of
688 * stream interface. Thus it is always safe to perform a tasklet_wakeup() on a
689 * stream interface, as the presence of the CS is checked there.
690 */
Olivier Houchard91894cb2018-08-02 18:06:28 +0200691struct task *si_cs_io_cb(struct task *t, void *ctx, unsigned short state)
692{
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200693 struct stream_interface *si = ctx;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200694 struct conn_stream *cs = objt_cs(si->end);
Olivier Houchardf6535282018-08-31 17:29:12 +0200695 int ret = 0;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200696
697 if (!cs)
698 return NULL;
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100699
Willy Tarreau691fe392018-11-12 18:48:52 +0100700 if (!(si->wait_event.wait_reason & SUB_CAN_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchardf6535282018-08-31 17:29:12 +0200701 ret = si_cs_send(cs);
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100702 if (!(si->wait_event.wait_reason & SUB_CAN_RECV))
Olivier Houchardf6535282018-08-31 17:29:12 +0200703 ret |= si_cs_recv(cs);
704 if (ret != 0)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200705 si_cs_process(cs);
Olivier Houchardf6535282018-08-31 17:29:12 +0200706
Olivier Houchard91894cb2018-08-02 18:06:28 +0200707 return (NULL);
708}
709
Willy Tarreau25f13102015-09-24 11:32:22 +0200710/* This function is designed to be called from within the stream handler to
711 * update the channels' expiration timers and the stream interface's flags
712 * based on the channels' flags. It needs to be called only once after the
713 * channels' flags have settled down, and before they are cleared, though it
714 * doesn't harm to call it as often as desired (it just slightly hurts
715 * performance). It must not be called from outside of the stream handler,
716 * as what it does will be used to compute the stream task's expiration.
717 */
718void stream_int_update(struct stream_interface *si)
719{
720 struct channel *ic = si_ic(si);
721 struct channel *oc = si_oc(si);
722
723 if (!(ic->flags & CF_SHUTR)) {
724 /* Read not closed, update FD status and timeout for reads */
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100725 if (ic->flags & CF_DONT_READ)
726 si_rx_chan_blk(si);
727 else
728 si_rx_chan_rdy(si);
729
730 if (!channel_is_empty(ic)) {
Willy Tarreauf26c26c2018-11-12 16:11:08 +0100731 /* stop reading, imposed by channel's policy or contents */
Willy Tarreaudb398432018-11-15 11:08:52 +0100732 si_rx_room_blk(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200733 }
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200734 else {
Willy Tarreau25f13102015-09-24 11:32:22 +0200735 /* (re)start reading and update timeout. Note: we don't recompute the timeout
736 * everytime we get here, otherwise it would risk never to expire. We only
737 * update it if is was not yet set. The stream socket handler will already
738 * have updated it if there has been a completed I/O.
739 */
Willy Tarreaudb398432018-11-15 11:08:52 +0100740 si_rx_room_rdy(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200741 }
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100742 if (si->flags & SI_FL_RXBLK_ANY & ~SI_FL_RX_WAIT_EP)
743 ic->rex = TICK_ETERNITY;
744 else if (!(ic->flags & CF_READ_NOEXP) && !tick_isset(ic->rex))
745 ic->rex = tick_add_ifset(now_ms, ic->rto);
746
Willy Tarreau47baeb82018-11-15 07:46:57 +0100747 si_chk_rcv(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200748 }
Willy Tarreauabb5d422018-11-14 16:58:52 +0100749 else
750 si_rx_shut_blk(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200751
752 if (!(oc->flags & CF_SHUTW)) {
753 /* Write not closed, update FD status and timeout for writes */
754 if (channel_is_empty(oc)) {
755 /* stop writing */
756 if (!(si->flags & SI_FL_WAIT_DATA)) {
757 if ((oc->flags & CF_SHUTW_NOW) == 0)
758 si->flags |= SI_FL_WAIT_DATA;
759 oc->wex = TICK_ETERNITY;
760 }
761 }
762 else {
763 /* (re)start writing and update timeout. Note: we don't recompute the timeout
764 * everytime we get here, otherwise it would risk never to expire. We only
765 * update it if is was not yet set. The stream socket handler will already
766 * have updated it if there has been a completed I/O.
767 */
768 si->flags &= ~SI_FL_WAIT_DATA;
769 if (!tick_isset(oc->wex)) {
770 oc->wex = tick_add_ifset(now_ms, oc->wto);
771 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
772 /* Note: depending on the protocol, we don't know if we're waiting
773 * for incoming data or not. So in order to prevent the socket from
774 * expiring read timeouts during writes, we refresh the read timeout,
775 * except if it was already infinite or if we have explicitly setup
776 * independent streams.
777 */
778 ic->rex = tick_add_ifset(now_ms, ic->rto);
779 }
780 }
781 }
782 }
783}
784
Willy Tarreaud14844a2018-11-08 18:15:29 +0100785/* updates both stream ints of a same stream at once */
786/* Updates at once the channel flags, and timers of both stream interfaces of a
787 * same stream, to complete the work after the analysers, then updates the data
788 * layer below. This will ensure that any synchronous update performed at the
789 * data layer will be reflected in the channel flags and/or stream-interface.
790 */
791void si_update_both(struct stream_interface *si_f, struct stream_interface *si_b)
792{
793 struct channel *req = si_ic(si_f);
794 struct channel *res = si_oc(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100795 struct conn_stream *cs;
Willy Tarreaud14844a2018-11-08 18:15:29 +0100796
797 req->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
798 res->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
799
800 si_f->flags &= ~(SI_FL_ERR|SI_FL_EXP);
801 si_b->flags &= ~(SI_FL_ERR|SI_FL_EXP);
802
803 si_f->prev_state = si_f->state;
804 si_b->prev_state = si_b->state;
805
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100806 /* front stream-int */
807 cs = objt_cs(si_f->end);
808 if (cs &&
809 si_f->state == SI_ST_EST &&
810 !(res->flags & CF_SHUTW) && /* Write not closed */
811 !channel_is_empty(res) &&
812 !(cs->flags & CS_FL_ERROR) &&
813 !(cs->conn->flags & CO_FL_ERROR)) {
814 if (si_cs_send(cs))
Willy Tarreaudb398432018-11-15 11:08:52 +0100815 si_rx_room_rdy(si_b);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100816 }
817
818 /* back stream-int */
819 cs = objt_cs(si_b->end);
820 if (cs &&
821 (si_b->state == SI_ST_EST || si_b->state == SI_ST_CON) &&
822 !(req->flags & CF_SHUTW) && /* Write not closed */
823 !channel_is_empty(req) &&
824 !(cs->flags & CS_FL_ERROR) &&
825 !(cs->conn->flags & CO_FL_ERROR)) {
826 if (si_cs_send(cs))
Willy Tarreaudb398432018-11-15 11:08:52 +0100827 si_rx_room_rdy(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100828 }
829
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100830 /* let's recompute both sides states */
831 if (si_f->state == SI_ST_EST)
832 stream_int_update(si_f);
833
834 if (si_b->state == SI_ST_EST)
835 stream_int_update(si_b);
836
837 /* stream ints are processed outside of process_stream() and must be
838 * handled at the latest moment.
839 */
840 if (obj_type(si_f->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +0100841 ((si_rx_endp_ready(si_f) && !si_rx_blocked(si_f)) ||
842 (si_tx_endp_ready(si_f) && !si_tx_blocked(si_f))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100843 appctx_wakeup(si_appctx(si_f));
Willy Tarreaud14844a2018-11-08 18:15:29 +0100844
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100845 if (obj_type(si_b->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +0100846 ((si_rx_endp_ready(si_b) && !si_rx_blocked(si_b)) ||
847 (si_tx_endp_ready(si_b) && !si_tx_blocked(si_b))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100848 appctx_wakeup(si_appctx(si_b));
Willy Tarreaud14844a2018-11-08 18:15:29 +0100849}
850
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200851/*
852 * This function performs a shutdown-read on a stream interface attached to
853 * a connection in a connected or init state (it does nothing for other
854 * states). It either shuts the read side or marks itself as closed. The buffer
855 * flags are updated to reflect the new state. If the stream interface has
856 * SI_FL_NOHALF, we also forward the close to the write side. If a control
857 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +0200858 * descriptors are then shutdown or closed accordingly. The function
859 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200860 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200861static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200862{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200863 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100864 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200865
Willy Tarreauabb5d422018-11-14 16:58:52 +0100866 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100867 ic->flags &= ~CF_SHUTR_NOW;
868 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200869 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100870 ic->flags |= CF_SHUTR;
871 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200872
873 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200874 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200875
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100876 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaua553ae92017-10-05 18:52:17 +0200877 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200878 si->state = SI_ST_DIS;
879 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200880 }
881 else if (si->flags & SI_FL_NOHALF) {
882 /* we want to immediately forward this close to the write side */
883 return stream_int_shutw_conn(si);
884 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200885}
886
887/*
888 * This function performs a shutdown-write on a stream interface attached to
889 * a connection in a connected or init state (it does nothing for other
890 * states). It either shuts the write side or marks itself as closed. The
891 * buffer flags are updated to reflect the new state. It does also close
892 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +0100893 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200894 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200895static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200896{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200897 struct conn_stream *cs = __objt_cs(si->end);
898 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100899 struct channel *ic = si_ic(si);
900 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200901
Willy Tarreauafc8a222014-11-28 15:46:27 +0100902 oc->flags &= ~CF_SHUTW_NOW;
903 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200904 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100905 oc->flags |= CF_SHUTW;
906 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +0100907 si_done_get(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200908
Hongbo Longe39683c2017-03-10 18:41:51 +0100909 if (tick_isset(si->hcto)) {
910 ic->rto = si->hcto;
911 ic->rex = tick_add(now_ms, ic->rto);
912 }
913
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200914 switch (si->state) {
915 case SI_ST_EST:
916 /* we have to shut before closing, otherwise some short messages
917 * may never leave the system, especially when there are remaining
918 * unread data in the socket input buffer, or when nolinger is set.
919 * However, if SI_FL_NOLINGER is explicitly set, we know there is
920 * no risk so we close both sides immediately.
921 */
922 if (si->flags & SI_FL_ERR) {
923 /* quick close, the socket is alredy shut anyway */
924 }
925 else if (si->flags & SI_FL_NOLINGER) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200926 /* unclean data-layer shutdown, typically an aborted request
927 * or a forwarded shutdown from a client to a server due to
928 * option abortonclose. No need for the TLS layer to try to
929 * emit a shutdown message.
930 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200931 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200932 }
933 else {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200934 /* clean data-layer shutdown. This only happens on the
935 * frontend side, or on the backend side when forwarding
936 * a client close in TCP mode or in HTTP TUNNEL mode
937 * while option abortonclose is set. We want the TLS
938 * layer to try to signal it to the peer before we close.
939 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200940 cs_shutw(cs, CS_SHW_NORMAL);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200941
Willy Tarreaua553ae92017-10-05 18:52:17 +0200942 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
943 /* OK just a shutw, but we want the caller
944 * to disable polling on this FD if exists.
945 */
946 conn_cond_update_polling(conn);
947 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200948 }
949 }
950
951 /* fall through */
952 case SI_ST_CON:
953 /* we may have to close a pending connection, and mark the
954 * response buffer as shutr
955 */
Willy Tarreaua553ae92017-10-05 18:52:17 +0200956 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200957 /* fall through */
958 case SI_ST_CER:
959 case SI_ST_QUE:
960 case SI_ST_TAR:
961 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +0200962 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200963 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +0100964 si->flags &= ~SI_FL_NOLINGER;
965 si_rx_shut_blk(si);
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{
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200981 /* (re)start reading */
982 tasklet_wakeup(si->wait_event.task);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200983}
984
985
Willy Tarreaude5722c2012-08-20 15:01:10 +0200986/* This function is used for inter-stream-interface calls. It is called by the
987 * producer to inform the consumer side that it may be interested in checking
988 * for data in the buffer. Note that it intentionally does not update timeouts,
989 * so that we can still check them later at wake-up.
990 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200991static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +0200992{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100993 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200994 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +0200995
Willy Tarreauafc8a222014-11-28 15:46:27 +0100996 if (unlikely(si->state > SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +0200997 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +0200998
Willy Tarreauafc8a222014-11-28 15:46:27 +0100999 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001000 return;
1001
Willy Tarreauafc8a222014-11-28 15:46:27 +01001002 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +01001003 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001004 return;
1005
Willy Tarreau691fe392018-11-12 18:48:52 +01001006 if (!(si->wait_event.wait_reason & SUB_CAN_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchard31f04e42018-10-22 16:01:09 +02001007 si_cs_send(cs);
Willy Tarreau33a09a52018-10-25 13:49:49 +02001008
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001009 if (cs->flags & CS_FL_ERROR || cs->conn->flags & CO_FL_ERROR) {
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001010 /* Write error on the file descriptor */
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001011 si->flags |= SI_FL_ERR;
1012 goto out_wakeup;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001013 }
1014
1015 /* OK, so now we know that some data might have been sent, and that we may
1016 * have to poll first. We have to do that too if the buffer is not empty.
1017 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001018 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001019 /* the connection is established but we can't write. Either the
1020 * buffer is empty, or we just refrain from sending because the
1021 * ->o limit was reached. Maybe we just wrote the last
1022 * chunk and need to close.
1023 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001024 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001025 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreaude5722c2012-08-20 15:01:10 +02001026 (si->state == SI_ST_EST)) {
1027 si_shutw(si);
1028 goto out_wakeup;
1029 }
1030
Willy Tarreauafc8a222014-11-28 15:46:27 +01001031 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001032 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001033 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001034 }
1035 else {
1036 /* Otherwise there are remaining data to be sent in the buffer,
1037 * which means we have to poll before doing so.
1038 */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001039 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001040 if (!tick_isset(oc->wex))
1041 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001042 }
1043
Willy Tarreauafc8a222014-11-28 15:46:27 +01001044 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1045 struct channel *ic = si_ic(si);
1046
Willy Tarreaude5722c2012-08-20 15:01:10 +02001047 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001048 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1049 !channel_is_empty(oc))
1050 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001051
Willy Tarreauafc8a222014-11-28 15:46:27 +01001052 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001053 /* Note: to prevent the client from expiring read timeouts
1054 * during writes, we refresh it. We only do this if the
1055 * interface is not configured for "independent streams",
1056 * because for some applications it's better not to do this,
1057 * for instance when continuously exchanging small amounts
1058 * of data which can full the socket buffers long before a
1059 * write timeout is detected.
1060 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001061 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001062 }
1063 }
1064
1065 /* in case of special condition (error, shutdown, end of write...), we
1066 * have to notify the task.
1067 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001068 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1069 ((oc->flags & CF_WAKE_WRITE) &&
1070 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreaue6300be2014-01-25 02:33:21 +01001071 si->state != SI_ST_EST)))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001072 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001073 if (!(si->flags & SI_FL_DONT_WAKE))
1074 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001075 }
1076}
1077
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001078/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001079 * This is the callback which is called by the connection layer to receive data
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001080 * into the buffer from the connection. It iterates over the mux layer's
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001081 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001082 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +02001083int si_cs_recv(struct conn_stream *cs)
Willy Tarreauce323de2012-08-20 21:41:06 +02001084{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001085 struct connection *conn = cs->conn;
1086 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001087 struct channel *ic = si_ic(si);
Olivier Houchardf6535282018-08-31 17:29:12 +02001088 int ret, max, cur_read = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001089 int read_poll = MAX_READ_POLL_LOOPS;
Christopher Fauletc6618d62018-10-11 15:56:04 +02001090 int flags = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001091
1092 /* stop immediately on errors. Note that we DON'T want to stop on
1093 * POLL_ERR, as the poller might report a write error while there
1094 * are still data available in the recv buffer. This typically
1095 * happens when we send too large a request to a backend server
1096 * which rejects it before reading it all.
1097 */
Olivier Houchard24b8fe82018-11-29 17:02:41 +01001098 if (!(cs->flags & CS_FL_RCV_MORE)) {
1099 if (!conn_xprt_ready(conn))
1100 return 0;
1101 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
1102 return 1; // We want to make sure si_cs_wake() is called, so that process_strema is woken up, on failure
1103 }
Olivier Houchardf6535282018-08-31 17:29:12 +02001104
1105 /* If another call to si_cs_recv() failed, and we subscribed to
1106 * recv events already, give up now.
1107 */
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001108 if (si->wait_event.wait_reason & SUB_CAN_RECV)
Olivier Houchardf6535282018-08-31 17:29:12 +02001109 return 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001110
Willy Tarreauce323de2012-08-20 21:41:06 +02001111 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001112 if (ic->flags & CF_SHUTR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001113 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001114
Willy Tarreau54e917c2017-08-30 07:35:35 +02001115 /* stop here if we reached the end of data */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001116 if (cs->flags & CS_FL_EOS)
Willy Tarreau54e917c2017-08-30 07:35:35 +02001117 goto out_shutdown_r;
1118
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001119
Willy Tarreau77e478c2018-06-19 07:03:14 +02001120 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !co_data(ic) &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001121 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001122 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001123 /* The buffer was empty and nothing was transferred for more
1124 * than one second. This was caused by a pause and not by
1125 * congestion. Reset any streaming mode to reduce latency.
1126 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001127 ic->xfer_small = 0;
1128 ic->xfer_large = 0;
1129 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001130 }
1131
Willy Tarreau96199b12012-08-24 00:46:52 +02001132 /* First, let's see if we may splice data across the channel without
1133 * using a buffer.
1134 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001135 if (conn->xprt->rcv_pipe && conn->mux->rcv_pipe &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001136 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1137 ic->flags & CF_KERN_SPLICING) {
Willy Tarreaud760eec2018-07-10 09:50:25 +02001138 if (c_data(ic)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001139 /* We're embarrassed, there are already data pending in
1140 * the buffer and we don't want to have them at two
1141 * locations at a time. Let's indicate we need some
1142 * place and ask the consumer to hurry.
1143 */
Christopher Fauletc6618d62018-10-11 15:56:04 +02001144 flags |= CO_RFL_BUF_FLUSH;
Willy Tarreau96199b12012-08-24 00:46:52 +02001145 goto abort_splice;
1146 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001147
Willy Tarreauafc8a222014-11-28 15:46:27 +01001148 if (unlikely(ic->pipe == NULL)) {
1149 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1150 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001151 goto abort_splice;
1152 }
1153 }
1154
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001155 ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001156 if (ret < 0) {
1157 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001158 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001159 goto abort_splice;
1160 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001161
Willy Tarreau96199b12012-08-24 00:46:52 +02001162 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001163 if (ic->to_forward != CHN_INFINITE_FORWARD)
1164 ic->to_forward -= ret;
1165 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001166 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001167 ic->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +02001168 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001169
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001170 if (cs->flags & CS_FL_EOS)
Willy Tarreau96199b12012-08-24 00:46:52 +02001171 goto out_shutdown_r;
1172
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001173 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001174 return 1;
Willy Tarreau96199b12012-08-24 00:46:52 +02001175
Willy Tarreau61d39a02013-07-18 21:49:32 +02001176 if (conn->flags & CO_FL_WAIT_ROOM) {
1177 /* the pipe is full or we have read enough data that it
1178 * could soon be full. Let's stop before needing to poll.
1179 */
Willy Tarreaudb398432018-11-15 11:08:52 +01001180 si_rx_room_blk(si);
Willy Tarreauffb12052018-11-15 16:06:02 +01001181 goto done_recv;
Willy Tarreau61d39a02013-07-18 21:49:32 +02001182 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001183
Willy Tarreauce323de2012-08-20 21:41:06 +02001184 /* splice not possible (anymore), let's go on on standard copy */
1185 }
Willy Tarreau81464b42018-11-15 15:52:53 +01001186 else {
1187 /* be sure not to block regular receive path below */
1188 conn->flags &= ~CO_FL_WAIT_ROOM;
1189 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001190
1191 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001192 if (ic->pipe && unlikely(!ic->pipe->data)) {
1193 put_pipe(ic->pipe);
1194 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001195 }
1196
Christopher Fauleta73e59b2016-12-09 17:30:18 +01001197 /* now we'll need a input buffer for the stream */
Willy Tarreau581abd32018-10-25 10:21:41 +02001198 if (!si_alloc_ibuf(si, &(si_strm(si)->buffer_wait)))
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001199 goto end_recv;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001200
Willy Tarreau61d39a02013-07-18 21:49:32 +02001201 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1202 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1203 * that if such an event is not handled above in splice, it will be handled here by
1204 * recv().
1205 */
Olivier Houchardc490efd2018-12-04 15:46:16 +01001206 while ((cs->flags & CS_FL_RCV_MORE) ||
1207 (!(conn->flags & (CO_FL_ERROR | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE)) &&
1208 (!(cs->flags & (CS_FL_ERROR|CS_FL_EOS))) && !(ic->flags & CF_SHUTR))) {
Christopher Faulet4eb7d742018-10-11 15:29:21 +02001209 /* <max> may be null. This is the mux responsibility to set
1210 * CS_FL_RCV_MORE on the CS if more space is needed.
1211 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001212 max = channel_recv_max(ic);
Christopher Faulet72d91252018-10-17 11:08:23 +02001213 ret = cs->conn->mux->rcv_buf(cs, &ic->buf, max,
1214 flags |
1215 (co_data(ic) ? CO_RFL_BUF_WET : 0) |
1216 ((channel_recv_limit(ic) < b_size(&ic->buf)) ? CO_RFL_KEEP_RSV : 0));
Willy Tarreau674e0ad2018-12-05 13:45:41 +01001217
Olivier Houchardd247be02018-12-06 16:22:29 +01001218 if (cs->flags & CS_FL_WANT_ROOM)
Willy Tarreaudb398432018-11-15 11:08:52 +01001219 si_rx_room_blk(si);
Willy Tarreau6577b482017-12-10 21:19:33 +01001220
Christopher Fauleteffc3752018-10-31 08:53:54 +01001221 if (cs->flags & CS_FL_READ_PARTIAL) {
1222 if (tick_isset(ic->rex))
1223 ic->rex = tick_add_ifset(now_ms, ic->rto);
1224 cs->flags &= ~CS_FL_READ_PARTIAL;
1225 }
1226
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001227 if (ret <= 0) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001228 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001229 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001230
1231 cur_read += ret;
1232
1233 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001234 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001235 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001236 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1237 if (fwd > ic->to_forward)
1238 fwd = ic->to_forward;
1239 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001240 }
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001241 c_adv(ic, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001242 }
1243
Willy Tarreauafc8a222014-11-28 15:46:27 +01001244 ic->flags |= CF_READ_PARTIAL;
1245 ic->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001246
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001247 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
1248 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001249 si_rx_chan_blk(si);
Willy Tarreau62dd6982017-11-18 11:26:20 +01001250 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001251 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001252
1253 /* if too many bytes were missing from last read, it means that
1254 * it's pointless trying to read again because the system does
1255 * not have them in buffers.
1256 */
1257 if (ret < max) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001258 /* if a streamer has read few data, it may be because we
1259 * have exhausted system buffers. It's not worth trying
1260 * again.
1261 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001262 if (ic->flags & CF_STREAMER) {
1263 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001264 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001265 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001266 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001267
1268 /* if we read a large block smaller than what we requested,
1269 * it's almost certain we'll never get anything more.
1270 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001271 if (ret >= global.tune.recv_enough) {
1272 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001273 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001274 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001275 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001276 }
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001277
1278 /* if we are waiting for more space, don't try to read more data
1279 * right now.
1280 */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001281 if (si_rx_blocked(si))
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001282 break;
Willy Tarreauce323de2012-08-20 21:41:06 +02001283 } /* while !flags */
1284
Willy Tarreauffb12052018-11-15 16:06:02 +01001285 done_recv:
Willy Tarreauc5890e62014-02-09 17:47:01 +01001286 if (cur_read) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001287 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001288 (cur_read <= ic->buf.size / 2)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001289 ic->xfer_large = 0;
1290 ic->xfer_small++;
1291 if (ic->xfer_small >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001292 /* we have read less than half of the buffer in
1293 * one pass, and this happened at least 3 times.
1294 * This is definitely not a streamer.
1295 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001296 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001297 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001298 else if (ic->xfer_small >= 2) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001299 /* if the buffer has been at least half full twice,
1300 * we receive faster than we send, so at least it
1301 * is not a "fast streamer".
1302 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001303 ic->flags &= ~CF_STREAMER_FAST;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001304 }
1305 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001306 else if (!(ic->flags & CF_STREAMER_FAST) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001307 (cur_read >= ic->buf.size - global.tune.maxrewrite)) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001308 /* we read a full buffer at once */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001309 ic->xfer_small = 0;
1310 ic->xfer_large++;
1311 if (ic->xfer_large >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001312 /* we call this buffer a fast streamer if it manages
1313 * to be filled in one call 3 consecutive times.
1314 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001315 ic->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001316 }
1317 }
1318 else {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001319 ic->xfer_small = 0;
1320 ic->xfer_large = 0;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001321 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001322 ic->last_read = now_ms;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001323 }
1324
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001325 end_recv:
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001326 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001327 return 1;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001328
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001329 if (cs->flags & CS_FL_EOS)
Willy Tarreauce323de2012-08-20 21:41:06 +02001330 /* connection closed */
1331 goto out_shutdown_r;
1332
Willy Tarreau32742fd2018-11-14 14:07:59 +01001333 /* Subscribe to receive events if we're blocking on I/O */
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001334 if (!si_rx_blocked(si)) {
Olivier Houchard53216e72018-10-10 15:46:36 +02001335 conn->mux->subscribe(cs, SUB_CAN_RECV, &si->wait_event);
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001336 si_rx_endp_done(si);
1337 } else {
1338 si_rx_endp_more(si);
1339 }
Olivier Houchardf6535282018-08-31 17:29:12 +02001340
Willy Tarreau32742fd2018-11-14 14:07:59 +01001341 return (cur_read != 0) || si_rx_blocked(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001342
1343 out_shutdown_r:
1344 /* we received a shutdown */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001345 ic->flags |= CF_READ_NULL;
1346 if (ic->flags & CF_AUTO_CLOSE)
1347 channel_shutw_now(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001348 stream_sock_read0(si);
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001349 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001350}
1351
1352/*
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001353 * This function propagates a null read received on a socket-based connection.
1354 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001355 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001356 */
1357void stream_sock_read0(struct stream_interface *si)
1358{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001359 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001360 struct channel *ic = si_ic(si);
1361 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001362
Willy Tarreauabb5d422018-11-14 16:58:52 +01001363 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001364 ic->flags &= ~CF_SHUTR_NOW;
1365 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001366 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001367 ic->flags |= CF_SHUTR;
1368 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001369
1370 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1371 return;
1372
Willy Tarreauafc8a222014-11-28 15:46:27 +01001373 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001374 goto do_close;
1375
1376 if (si->flags & SI_FL_NOHALF) {
1377 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001378 /* force flag on ssl to keep stream in cache */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001379 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001380 goto do_close;
1381 }
1382
1383 /* otherwise that's just a normal read shutdown */
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001384 return;
1385
1386 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001387 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaua553ae92017-10-05 18:52:17 +02001388 cs_close(cs);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001389
Willy Tarreauafc8a222014-11-28 15:46:27 +01001390 oc->flags &= ~CF_SHUTW_NOW;
1391 oc->flags |= CF_SHUTW;
1392 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001393
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001394 si_done_get(si);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001395
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001396 si->state = SI_ST_DIS;
1397 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001398 return;
1399}
1400
Willy Tarreau651e1822015-09-23 20:06:13 +02001401/* Callback to be used by applet handlers upon completion. It updates the stream
1402 * (which may or may not take this opportunity to try to forward data), then
Emeric Brun2802b072017-06-30 14:11:56 +02001403 * may re-enable the applet's based on the channels and stream interface's final
Willy Tarreau651e1822015-09-23 20:06:13 +02001404 * states.
1405 */
Willy Tarreauaa977ba2015-09-25 11:45:06 +02001406void si_applet_wake_cb(struct stream_interface *si)
Willy Tarreaue5f86492015-04-19 15:16:35 +02001407{
Willy Tarreaueca572f2015-09-25 19:11:55 +02001408 struct channel *ic = si_ic(si);
1409
1410 /* If the applet wants to write and the channel is closed, it's a
1411 * broken pipe and it must be reported.
1412 */
Willy Tarreau05b9b642018-11-14 13:43:35 +01001413 if (!(si->flags & SI_FL_RX_WAIT_EP) && (ic->flags & CF_SHUTR))
Willy Tarreaueca572f2015-09-25 19:11:55 +02001414 si->flags |= SI_FL_ERR;
1415
Willy Tarreau186dcdd2018-11-16 16:18:34 +01001416 /* automatically mark the applet having data available if it reported
1417 * begin blocked by the channel.
1418 */
1419 if (si_rx_blocked(si))
1420 si_rx_endp_more(si);
1421
Willy Tarreau651e1822015-09-23 20:06:13 +02001422 /* update the stream-int, channels, and possibly wake the stream up */
1423 stream_int_notify(si);
Willy Tarreaue5f86492015-04-19 15:16:35 +02001424
Willy Tarreau32742fd2018-11-14 14:07:59 +01001425 /* stream_int_notify may have passed through chk_snd and released some
1426 * RXBLK flags. Process_stream will consider those flags to wake up the
1427 * appctx but in the case the task is not in runqueue we may have to
1428 * wakeup the appctx immediately.
Emeric Brun2802b072017-06-30 14:11:56 +02001429 */
Willy Tarreaud0d40eb2018-11-09 14:56:01 +01001430 if (!task_in_rq(si_task(si)) &&
Willy Tarreau32742fd2018-11-14 14:07:59 +01001431 ((si_rx_endp_ready(si) && !si_rx_blocked(si)) ||
1432 (si_tx_endp_ready(si) && !si_tx_blocked(si))))
Willy Tarreau563cc372015-04-19 18:13:56 +02001433 appctx_wakeup(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001434}
1435
1436/*
1437 * This function performs a shutdown-read on a stream interface attached to an
1438 * applet in a connected or init state (it does nothing for other states). It
1439 * either shuts the read side or marks itself as closed. The buffer flags are
1440 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1441 * we also forward the close to the write side. The owner task is woken up if
1442 * it exists.
1443 */
1444static void stream_int_shutr_applet(struct stream_interface *si)
1445{
1446 struct channel *ic = si_ic(si);
1447
Willy Tarreauabb5d422018-11-14 16:58:52 +01001448 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001449 ic->flags &= ~CF_SHUTR_NOW;
1450 if (ic->flags & CF_SHUTR)
1451 return;
1452 ic->flags |= CF_SHUTR;
1453 ic->rex = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001454
Willy Tarreau828824a2015-04-19 17:20:03 +02001455 /* Note: on shutr, we don't call the applet */
1456
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001457 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1458 return;
1459
1460 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau958f0742015-09-25 20:24:26 +02001461 si_applet_release(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001462 si->state = SI_ST_DIS;
1463 si->exp = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001464 }
1465 else if (si->flags & SI_FL_NOHALF) {
1466 /* we want to immediately forward this close to the write side */
1467 return stream_int_shutw_applet(si);
1468 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001469}
1470
1471/*
1472 * This function performs a shutdown-write on a stream interface attached to an
1473 * applet in a connected or init state (it does nothing for other states). It
1474 * either shuts the write side or marks itself as closed. The buffer flags are
1475 * updated to reflect the new state. It does also close everything if the SI
1476 * was marked as being in error state. The owner task is woken up if it exists.
1477 */
1478static void stream_int_shutw_applet(struct stream_interface *si)
1479{
1480 struct channel *ic = si_ic(si);
1481 struct channel *oc = si_oc(si);
1482
1483 oc->flags &= ~CF_SHUTW_NOW;
1484 if (oc->flags & CF_SHUTW)
1485 return;
1486 oc->flags |= CF_SHUTW;
1487 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001488 si_done_get(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001489
Hongbo Longe39683c2017-03-10 18:41:51 +01001490 if (tick_isset(si->hcto)) {
1491 ic->rto = si->hcto;
1492 ic->rex = tick_add(now_ms, ic->rto);
1493 }
1494
Willy Tarreau828824a2015-04-19 17:20:03 +02001495 /* on shutw we always wake the applet up */
1496 appctx_wakeup(si_appctx(si));
1497
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001498 switch (si->state) {
1499 case SI_ST_EST:
1500 /* we have to shut before closing, otherwise some short messages
1501 * may never leave the system, especially when there are remaining
1502 * unread data in the socket input buffer, or when nolinger is set.
1503 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1504 * no risk so we close both sides immediately.
1505 */
1506 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1507 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1508 return;
1509
1510 /* fall through */
1511 case SI_ST_CON:
1512 case SI_ST_CER:
1513 case SI_ST_QUE:
1514 case SI_ST_TAR:
1515 /* Note that none of these states may happen with applets */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001516 si_applet_release(si);
Willy Tarreau958f0742015-09-25 20:24:26 +02001517 si->state = SI_ST_DIS;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001518 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +01001519 si->flags &= ~SI_FL_NOLINGER;
1520 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001521 ic->flags &= ~CF_SHUTR_NOW;
1522 ic->flags |= CF_SHUTR;
1523 ic->rex = TICK_ETERNITY;
1524 si->exp = TICK_ETERNITY;
1525 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001526}
1527
1528/* chk_rcv function for applets */
1529static void stream_int_chk_rcv_applet(struct stream_interface *si)
1530{
1531 struct channel *ic = si_ic(si);
1532
1533 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1534 __FUNCTION__,
1535 si, si->state, ic->flags, si_oc(si)->flags);
1536
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001537 if (!ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001538 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001539 appctx_wakeup(si_appctx(si));
Thierry FOURNIER5bc2cbf2015-09-04 18:40:36 +02001540 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001541}
1542
1543/* chk_snd function for applets */
1544static void stream_int_chk_snd_applet(struct stream_interface *si)
1545{
1546 struct channel *oc = si_oc(si);
1547
1548 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1549 __FUNCTION__,
1550 si, si->state, si_ic(si)->flags, oc->flags);
1551
1552 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1553 return;
1554
Willy Tarreau828824a2015-04-19 17:20:03 +02001555 /* we only wake the applet up if it was waiting for some data */
1556
1557 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001558 return;
1559
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001560 if (!tick_isset(oc->wex))
1561 oc->wex = tick_add_ifset(now_ms, oc->wto);
1562
Willy Tarreau828824a2015-04-19 17:20:03 +02001563 if (!channel_is_empty(oc)) {
1564 /* (re)start sending */
1565 appctx_wakeup(si_appctx(si));
1566 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001567}
1568
Willy Tarreaudded32d2008-11-30 19:48:07 +01001569/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001570 * Local variables:
1571 * c-indent-level: 8
1572 * c-basic-offset: 8
1573 * End:
1574 */