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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
604 if (conn->flags & CO_FL_HANDSHAKE) {
605 /* a handshake was requested */
606 /* Schedule ourself to be woken up once the handshake is done */
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200607 conn->xprt->subscribe(conn, SUB_CAN_SEND, &si->wait_event);
Olivier Houchardf6535282018-08-31 17:29:12 +0200608 return 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200609 }
610
611 /* we might have been called just after an asynchronous shutw */
612 if (si_oc(si)->flags & CF_SHUTW)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200613 return 1;
Willy Tarreau5368d802012-08-21 18:22:06 +0200614
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200615 if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) {
616 ret = conn->mux->snd_pipe(cs, oc->pipe);
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200617 if (ret > 0) {
Willy Tarreauede3d882018-10-24 17:17:56 +0200618 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200619 did_send = 1;
620 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200621
Willy Tarreauafc8a222014-11-28 15:46:27 +0100622 if (!oc->pipe->data) {
623 put_pipe(oc->pipe);
624 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200625 }
626
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200627 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardf6535282018-08-31 17:29:12 +0200628 return 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200629 }
630
631 /* At this point, the pipe is empty, but we may still have data pending
632 * in the normal buffer.
633 */
Willy Tarreau77e478c2018-06-19 07:03:14 +0200634 if (!co_data(oc))
Willy Tarreauf6975aa2018-11-15 14:33:05 +0100635 goto end;
Willy Tarreau5368d802012-08-21 18:22:06 +0200636
Godbache68e02d2013-10-11 15:48:29 +0800637 /* when we're here, we already know that there is no spliced
Willy Tarreau5368d802012-08-21 18:22:06 +0200638 * data left, and that there are sendable buffered data.
639 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200640 if (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_HANDSHAKE)) &&
641 !(cs->flags & CS_FL_ERROR) && !(oc->flags & CF_SHUTW)) {
Willy Tarreau5368d802012-08-21 18:22:06 +0200642 /* check if we want to inform the kernel that we're interested in
643 * sending more data after this call. We want this if :
644 * - we're about to close after this last send and want to merge
645 * the ongoing FIN with the last segment.
646 * - we know we can't send everything at once and must get back
647 * here because of unaligned data
648 * - there is still a finite amount of data to forward
649 * The test is arranged so that the most common case does only 2
650 * tests.
651 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100652 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200653
Willy Tarreauafc8a222014-11-28 15:46:27 +0100654 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
655 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
Willy Tarreau4ac49282017-10-17 16:33:46 +0200656 (oc->flags & CF_EXPECT_MORE))) ||
Willy Tarreauecd2e152017-11-07 15:07:25 +0100657 ((oc->flags & CF_ISRESP) &&
658 ((oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW)) == (CF_AUTO_CLOSE|CF_SHUTW_NOW))))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100659 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200660
Willy Tarreauafc8a222014-11-28 15:46:27 +0100661 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100662 send_flag |= CO_SFL_STREAMER;
663
Olivier Houcharded0f2072018-08-16 15:41:52 +0200664 ret = cs->conn->mux->snd_buf(cs, &oc->buf, co_data(oc), send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800665 if (ret > 0) {
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200666 did_send = 1;
Willy Tarreauede3d882018-10-24 17:17:56 +0200667 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Willy Tarreau5368d802012-08-21 18:22:06 +0200668
Willy Tarreau77e478c2018-06-19 07:03:14 +0200669 co_set_data(oc, co_data(oc) - ret);
Willy Tarreaudeccd112018-06-14 18:38:55 +0200670 c_realign_if_empty(oc);
671
672 if (!co_data(oc)) {
Godbache68e02d2013-10-11 15:48:29 +0800673 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100674 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800675 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200676
Godbache68e02d2013-10-11 15:48:29 +0800677 /* if some data remain in the buffer, it's only because the
678 * system buffers are full, we will try next time.
679 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200680 }
Godbache68e02d2013-10-11 15:48:29 +0800681 }
Willy Tarreauf6975aa2018-11-15 14:33:05 +0100682 end:
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200683 /* 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 +0100684 if (!channel_is_empty(oc))
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200685 conn->mux->subscribe(cs, SUB_CAN_SEND, &si->wait_event);
Olivier Houchardf6535282018-08-31 17:29:12 +0200686 return did_send;
Willy Tarreau5368d802012-08-21 18:22:06 +0200687}
688
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100689/* This is the ->process() function for any stream-interface's wait_event task.
690 * It's assigned during the stream-interface's initialization, for any type of
691 * stream interface. Thus it is always safe to perform a tasklet_wakeup() on a
692 * stream interface, as the presence of the CS is checked there.
693 */
Olivier Houchard91894cb2018-08-02 18:06:28 +0200694struct task *si_cs_io_cb(struct task *t, void *ctx, unsigned short state)
695{
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200696 struct stream_interface *si = ctx;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200697 struct conn_stream *cs = objt_cs(si->end);
Olivier Houchardf6535282018-08-31 17:29:12 +0200698 int ret = 0;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200699
700 if (!cs)
701 return NULL;
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100702
Willy Tarreau691fe392018-11-12 18:48:52 +0100703 if (!(si->wait_event.wait_reason & SUB_CAN_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchardf6535282018-08-31 17:29:12 +0200704 ret = si_cs_send(cs);
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100705 if (!(si->wait_event.wait_reason & SUB_CAN_RECV))
Olivier Houchardf6535282018-08-31 17:29:12 +0200706 ret |= si_cs_recv(cs);
707 if (ret != 0)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200708 si_cs_process(cs);
Olivier Houchardf6535282018-08-31 17:29:12 +0200709
Olivier Houchard91894cb2018-08-02 18:06:28 +0200710 return (NULL);
711}
712
Willy Tarreau25f13102015-09-24 11:32:22 +0200713/* This function is designed to be called from within the stream handler to
714 * update the channels' expiration timers and the stream interface's flags
715 * based on the channels' flags. It needs to be called only once after the
716 * channels' flags have settled down, and before they are cleared, though it
717 * doesn't harm to call it as often as desired (it just slightly hurts
718 * performance). It must not be called from outside of the stream handler,
719 * as what it does will be used to compute the stream task's expiration.
720 */
721void stream_int_update(struct stream_interface *si)
722{
723 struct channel *ic = si_ic(si);
724 struct channel *oc = si_oc(si);
725
726 if (!(ic->flags & CF_SHUTR)) {
727 /* Read not closed, update FD status and timeout for reads */
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100728 if (ic->flags & CF_DONT_READ)
729 si_rx_chan_blk(si);
730 else
731 si_rx_chan_rdy(si);
732
733 if (!channel_is_empty(ic)) {
Willy Tarreauf26c26c2018-11-12 16:11:08 +0100734 /* stop reading, imposed by channel's policy or contents */
Willy Tarreaudb398432018-11-15 11:08:52 +0100735 si_rx_room_blk(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200736 }
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200737 else {
Willy Tarreau25f13102015-09-24 11:32:22 +0200738 /* (re)start reading and update timeout. Note: we don't recompute the timeout
739 * everytime we get here, otherwise it would risk never to expire. We only
740 * update it if is was not yet set. The stream socket handler will already
741 * have updated it if there has been a completed I/O.
742 */
Willy Tarreaudb398432018-11-15 11:08:52 +0100743 si_rx_room_rdy(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200744 }
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100745 if (si->flags & SI_FL_RXBLK_ANY & ~SI_FL_RX_WAIT_EP)
746 ic->rex = TICK_ETERNITY;
747 else if (!(ic->flags & CF_READ_NOEXP) && !tick_isset(ic->rex))
748 ic->rex = tick_add_ifset(now_ms, ic->rto);
749
Willy Tarreau47baeb82018-11-15 07:46:57 +0100750 si_chk_rcv(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200751 }
Willy Tarreauabb5d422018-11-14 16:58:52 +0100752 else
753 si_rx_shut_blk(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200754
755 if (!(oc->flags & CF_SHUTW)) {
756 /* Write not closed, update FD status and timeout for writes */
757 if (channel_is_empty(oc)) {
758 /* stop writing */
759 if (!(si->flags & SI_FL_WAIT_DATA)) {
760 if ((oc->flags & CF_SHUTW_NOW) == 0)
761 si->flags |= SI_FL_WAIT_DATA;
762 oc->wex = TICK_ETERNITY;
763 }
764 }
765 else {
766 /* (re)start writing and update timeout. Note: we don't recompute the timeout
767 * everytime we get here, otherwise it would risk never to expire. We only
768 * update it if is was not yet set. The stream socket handler will already
769 * have updated it if there has been a completed I/O.
770 */
771 si->flags &= ~SI_FL_WAIT_DATA;
772 if (!tick_isset(oc->wex)) {
773 oc->wex = tick_add_ifset(now_ms, oc->wto);
774 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
775 /* Note: depending on the protocol, we don't know if we're waiting
776 * for incoming data or not. So in order to prevent the socket from
777 * expiring read timeouts during writes, we refresh the read timeout,
778 * except if it was already infinite or if we have explicitly setup
779 * independent streams.
780 */
781 ic->rex = tick_add_ifset(now_ms, ic->rto);
782 }
783 }
784 }
785 }
786}
787
Willy Tarreaud14844a2018-11-08 18:15:29 +0100788/* updates both stream ints of a same stream at once */
789/* Updates at once the channel flags, and timers of both stream interfaces of a
790 * same stream, to complete the work after the analysers, then updates the data
791 * layer below. This will ensure that any synchronous update performed at the
792 * data layer will be reflected in the channel flags and/or stream-interface.
793 */
794void si_update_both(struct stream_interface *si_f, struct stream_interface *si_b)
795{
796 struct channel *req = si_ic(si_f);
797 struct channel *res = si_oc(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100798 struct conn_stream *cs;
Willy Tarreaud14844a2018-11-08 18:15:29 +0100799
800 req->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
801 res->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
802
803 si_f->flags &= ~(SI_FL_ERR|SI_FL_EXP);
804 si_b->flags &= ~(SI_FL_ERR|SI_FL_EXP);
805
806 si_f->prev_state = si_f->state;
807 si_b->prev_state = si_b->state;
808
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100809 /* front stream-int */
810 cs = objt_cs(si_f->end);
811 if (cs &&
812 si_f->state == SI_ST_EST &&
813 !(res->flags & CF_SHUTW) && /* Write not closed */
814 !channel_is_empty(res) &&
815 !(cs->flags & CS_FL_ERROR) &&
816 !(cs->conn->flags & CO_FL_ERROR)) {
817 if (si_cs_send(cs))
Willy Tarreaudb398432018-11-15 11:08:52 +0100818 si_rx_room_rdy(si_b);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100819 }
820
821 /* back stream-int */
822 cs = objt_cs(si_b->end);
823 if (cs &&
824 (si_b->state == SI_ST_EST || si_b->state == SI_ST_CON) &&
825 !(req->flags & CF_SHUTW) && /* Write not closed */
826 !channel_is_empty(req) &&
827 !(cs->flags & CS_FL_ERROR) &&
828 !(cs->conn->flags & CO_FL_ERROR)) {
829 if (si_cs_send(cs))
Willy Tarreaudb398432018-11-15 11:08:52 +0100830 si_rx_room_rdy(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100831 }
832
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100833 /* let's recompute both sides states */
834 if (si_f->state == SI_ST_EST)
835 stream_int_update(si_f);
836
837 if (si_b->state == SI_ST_EST)
838 stream_int_update(si_b);
839
840 /* stream ints are processed outside of process_stream() and must be
841 * handled at the latest moment.
842 */
843 if (obj_type(si_f->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +0100844 ((si_rx_endp_ready(si_f) && !si_rx_blocked(si_f)) ||
845 (si_tx_endp_ready(si_f) && !si_tx_blocked(si_f))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100846 appctx_wakeup(si_appctx(si_f));
Willy Tarreaud14844a2018-11-08 18:15:29 +0100847
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100848 if (obj_type(si_b->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +0100849 ((si_rx_endp_ready(si_b) && !si_rx_blocked(si_b)) ||
850 (si_tx_endp_ready(si_b) && !si_tx_blocked(si_b))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100851 appctx_wakeup(si_appctx(si_b));
Willy Tarreaud14844a2018-11-08 18:15:29 +0100852}
853
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200854/*
855 * This function performs a shutdown-read on a stream interface attached to
856 * a connection in a connected or init state (it does nothing for other
857 * states). It either shuts the read side or marks itself as closed. The buffer
858 * flags are updated to reflect the new state. If the stream interface has
859 * SI_FL_NOHALF, we also forward the close to the write side. If a control
860 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +0200861 * descriptors are then shutdown or closed accordingly. The function
862 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200863 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200864static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200865{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200866 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100867 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200868
Willy Tarreauabb5d422018-11-14 16:58:52 +0100869 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100870 ic->flags &= ~CF_SHUTR_NOW;
871 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200872 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100873 ic->flags |= CF_SHUTR;
874 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200875
876 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200877 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200878
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100879 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaua553ae92017-10-05 18:52:17 +0200880 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200881 si->state = SI_ST_DIS;
882 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200883 }
884 else if (si->flags & SI_FL_NOHALF) {
885 /* we want to immediately forward this close to the write side */
886 return stream_int_shutw_conn(si);
887 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200888}
889
890/*
891 * This function performs a shutdown-write on a stream interface attached to
892 * a connection in a connected or init state (it does nothing for other
893 * states). It either shuts the write side or marks itself as closed. The
894 * buffer flags are updated to reflect the new state. It does also close
895 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +0100896 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200897 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200898static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200899{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200900 struct conn_stream *cs = __objt_cs(si->end);
901 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100902 struct channel *ic = si_ic(si);
903 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200904
Willy Tarreauafc8a222014-11-28 15:46:27 +0100905 oc->flags &= ~CF_SHUTW_NOW;
906 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200907 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100908 oc->flags |= CF_SHUTW;
909 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +0100910 si_done_get(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200911
Hongbo Longe39683c2017-03-10 18:41:51 +0100912 if (tick_isset(si->hcto)) {
913 ic->rto = si->hcto;
914 ic->rex = tick_add(now_ms, ic->rto);
915 }
916
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200917 switch (si->state) {
918 case SI_ST_EST:
919 /* we have to shut before closing, otherwise some short messages
920 * may never leave the system, especially when there are remaining
921 * unread data in the socket input buffer, or when nolinger is set.
922 * However, if SI_FL_NOLINGER is explicitly set, we know there is
923 * no risk so we close both sides immediately.
924 */
925 if (si->flags & SI_FL_ERR) {
926 /* quick close, the socket is alredy shut anyway */
927 }
928 else if (si->flags & SI_FL_NOLINGER) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200929 /* unclean data-layer shutdown, typically an aborted request
930 * or a forwarded shutdown from a client to a server due to
931 * option abortonclose. No need for the TLS layer to try to
932 * emit a shutdown message.
933 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200934 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200935 }
936 else {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200937 /* clean data-layer shutdown. This only happens on the
938 * frontend side, or on the backend side when forwarding
939 * a client close in TCP mode or in HTTP TUNNEL mode
940 * while option abortonclose is set. We want the TLS
941 * layer to try to signal it to the peer before we close.
942 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200943 cs_shutw(cs, CS_SHW_NORMAL);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200944
Willy Tarreaua553ae92017-10-05 18:52:17 +0200945 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
946 /* OK just a shutw, but we want the caller
947 * to disable polling on this FD if exists.
948 */
949 conn_cond_update_polling(conn);
950 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200951 }
952 }
953
954 /* fall through */
955 case SI_ST_CON:
956 /* we may have to close a pending connection, and mark the
957 * response buffer as shutr
958 */
Willy Tarreaua553ae92017-10-05 18:52:17 +0200959 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200960 /* fall through */
961 case SI_ST_CER:
962 case SI_ST_QUE:
963 case SI_ST_TAR:
964 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +0200965 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200966 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +0100967 si->flags &= ~SI_FL_NOLINGER;
968 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100969 ic->flags &= ~CF_SHUTR_NOW;
970 ic->flags |= CF_SHUTR;
971 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200972 si->exp = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +0200973 }
974}
975
Willy Tarreau46a8d922012-08-20 12:38:36 +0200976/* This function is used for inter-stream-interface calls. It is called by the
977 * consumer to inform the producer side that it may be interested in checking
978 * for free space in the buffer. Note that it intentionally does not update
979 * timeouts, so that we can still check them later at wake-up. This function is
980 * dedicated to connection-based stream interfaces.
981 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200982static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +0200983{
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200984 /* (re)start reading */
985 tasklet_wakeup(si->wait_event.task);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200986}
987
988
Willy Tarreaude5722c2012-08-20 15:01:10 +0200989/* This function is used for inter-stream-interface calls. It is called by the
990 * producer to inform the consumer side that it may be interested in checking
991 * for data in the buffer. Note that it intentionally does not update timeouts,
992 * so that we can still check them later at wake-up.
993 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200994static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +0200995{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100996 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200997 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +0200998
Willy Tarreauafc8a222014-11-28 15:46:27 +0100999 if (unlikely(si->state > SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +02001000 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001001
Willy Tarreauafc8a222014-11-28 15:46:27 +01001002 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001003 return;
1004
Willy Tarreauafc8a222014-11-28 15:46:27 +01001005 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +01001006 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001007 return;
1008
Willy Tarreau691fe392018-11-12 18:48:52 +01001009 if (!(si->wait_event.wait_reason & SUB_CAN_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchard31f04e42018-10-22 16:01:09 +02001010 si_cs_send(cs);
Willy Tarreau33a09a52018-10-25 13:49:49 +02001011
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001012 if (cs->flags & CS_FL_ERROR || cs->conn->flags & CO_FL_ERROR) {
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001013 /* Write error on the file descriptor */
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001014 si->flags |= SI_FL_ERR;
1015 goto out_wakeup;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001016 }
1017
1018 /* OK, so now we know that some data might have been sent, and that we may
1019 * have to poll first. We have to do that too if the buffer is not empty.
1020 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001021 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001022 /* the connection is established but we can't write. Either the
1023 * buffer is empty, or we just refrain from sending because the
1024 * ->o limit was reached. Maybe we just wrote the last
1025 * chunk and need to close.
1026 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001027 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001028 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreaude5722c2012-08-20 15:01:10 +02001029 (si->state == SI_ST_EST)) {
1030 si_shutw(si);
1031 goto out_wakeup;
1032 }
1033
Willy Tarreauafc8a222014-11-28 15:46:27 +01001034 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001035 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001036 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001037 }
1038 else {
1039 /* Otherwise there are remaining data to be sent in the buffer,
1040 * which means we have to poll before doing so.
1041 */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001042 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001043 if (!tick_isset(oc->wex))
1044 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001045 }
1046
Willy Tarreauafc8a222014-11-28 15:46:27 +01001047 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1048 struct channel *ic = si_ic(si);
1049
Willy Tarreaude5722c2012-08-20 15:01:10 +02001050 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001051 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1052 !channel_is_empty(oc))
1053 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001054
Willy Tarreauafc8a222014-11-28 15:46:27 +01001055 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001056 /* Note: to prevent the client from expiring read timeouts
1057 * during writes, we refresh it. We only do this if the
1058 * interface is not configured for "independent streams",
1059 * because for some applications it's better not to do this,
1060 * for instance when continuously exchanging small amounts
1061 * of data which can full the socket buffers long before a
1062 * write timeout is detected.
1063 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001064 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001065 }
1066 }
1067
1068 /* in case of special condition (error, shutdown, end of write...), we
1069 * have to notify the task.
1070 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001071 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1072 ((oc->flags & CF_WAKE_WRITE) &&
1073 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreaue6300be2014-01-25 02:33:21 +01001074 si->state != SI_ST_EST)))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001075 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001076 if (!(si->flags & SI_FL_DONT_WAKE))
1077 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001078 }
1079}
1080
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001081/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001082 * This is the callback which is called by the connection layer to receive data
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001083 * into the buffer from the connection. It iterates over the mux layer's
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001084 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001085 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +02001086int si_cs_recv(struct conn_stream *cs)
Willy Tarreauce323de2012-08-20 21:41:06 +02001087{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001088 struct connection *conn = cs->conn;
1089 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001090 struct channel *ic = si_ic(si);
Olivier Houchardf6535282018-08-31 17:29:12 +02001091 int ret, max, cur_read = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001092 int read_poll = MAX_READ_POLL_LOOPS;
Christopher Fauletc6618d62018-10-11 15:56:04 +02001093 int flags = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001094
1095 /* stop immediately on errors. Note that we DON'T want to stop on
1096 * POLL_ERR, as the poller might report a write error while there
1097 * are still data available in the recv buffer. This typically
1098 * happens when we send too large a request to a backend server
1099 * which rejects it before reading it all.
1100 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +02001101 if (!conn_xprt_ready(conn))
1102 return 0;
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001103 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001104 return 1; // We want to make sure si_cs_wake() is called, so that process_strema is woken up, on failure
Olivier Houchardf6535282018-08-31 17:29:12 +02001105
1106 /* If another call to si_cs_recv() failed, and we subscribed to
1107 * recv events already, give up now.
1108 */
Olivier Houchardfa8aa862018-10-10 18:25:41 +02001109 if (si->wait_event.wait_reason & SUB_CAN_RECV)
Olivier Houchardf6535282018-08-31 17:29:12 +02001110 return 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001111
Willy Tarreauce323de2012-08-20 21:41:06 +02001112 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001113 if (ic->flags & CF_SHUTR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001114 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001115
Willy Tarreau54e917c2017-08-30 07:35:35 +02001116 /* stop here if we reached the end of data */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001117 if (cs->flags & CS_FL_EOS)
Willy Tarreau54e917c2017-08-30 07:35:35 +02001118 goto out_shutdown_r;
1119
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001120
Willy Tarreau77e478c2018-06-19 07:03:14 +02001121 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !co_data(ic) &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001122 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001123 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001124 /* The buffer was empty and nothing was transferred for more
1125 * than one second. This was caused by a pause and not by
1126 * congestion. Reset any streaming mode to reduce latency.
1127 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001128 ic->xfer_small = 0;
1129 ic->xfer_large = 0;
1130 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001131 }
1132
Willy Tarreau96199b12012-08-24 00:46:52 +02001133 /* First, let's see if we may splice data across the channel without
1134 * using a buffer.
1135 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001136 if (conn->xprt->rcv_pipe && conn->mux->rcv_pipe &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001137 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1138 ic->flags & CF_KERN_SPLICING) {
Willy Tarreaud760eec2018-07-10 09:50:25 +02001139 if (c_data(ic)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001140 /* We're embarrassed, there are already data pending in
1141 * the buffer and we don't want to have them at two
1142 * locations at a time. Let's indicate we need some
1143 * place and ask the consumer to hurry.
1144 */
Christopher Fauletc6618d62018-10-11 15:56:04 +02001145 flags |= CO_RFL_BUF_FLUSH;
Willy Tarreau96199b12012-08-24 00:46:52 +02001146 goto abort_splice;
1147 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001148
Willy Tarreauafc8a222014-11-28 15:46:27 +01001149 if (unlikely(ic->pipe == NULL)) {
1150 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1151 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001152 goto abort_splice;
1153 }
1154 }
1155
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001156 ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001157 if (ret < 0) {
1158 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001159 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001160 goto abort_splice;
1161 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001162
Willy Tarreau96199b12012-08-24 00:46:52 +02001163 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001164 if (ic->to_forward != CHN_INFINITE_FORWARD)
1165 ic->to_forward -= ret;
1166 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001167 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001168 ic->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +02001169 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001170
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001171 if (cs->flags & CS_FL_EOS)
Willy Tarreau96199b12012-08-24 00:46:52 +02001172 goto out_shutdown_r;
1173
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001174 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001175 return 1;
Willy Tarreau96199b12012-08-24 00:46:52 +02001176
Willy Tarreau61d39a02013-07-18 21:49:32 +02001177 if (conn->flags & CO_FL_WAIT_ROOM) {
1178 /* the pipe is full or we have read enough data that it
1179 * could soon be full. Let's stop before needing to poll.
1180 */
Willy Tarreaudb398432018-11-15 11:08:52 +01001181 si_rx_room_blk(si);
Willy Tarreauffb12052018-11-15 16:06:02 +01001182 goto done_recv;
Willy Tarreau61d39a02013-07-18 21:49:32 +02001183 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001184
Willy Tarreauce323de2012-08-20 21:41:06 +02001185 /* splice not possible (anymore), let's go on on standard copy */
1186 }
Willy Tarreau81464b42018-11-15 15:52:53 +01001187 else {
1188 /* be sure not to block regular receive path below */
1189 conn->flags &= ~CO_FL_WAIT_ROOM;
1190 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001191
1192 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001193 if (ic->pipe && unlikely(!ic->pipe->data)) {
1194 put_pipe(ic->pipe);
1195 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001196 }
1197
Christopher Fauleta73e59b2016-12-09 17:30:18 +01001198 /* now we'll need a input buffer for the stream */
Willy Tarreau581abd32018-10-25 10:21:41 +02001199 if (!si_alloc_ibuf(si, &(si_strm(si)->buffer_wait)))
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001200 goto end_recv;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001201
Willy Tarreau61d39a02013-07-18 21:49:32 +02001202 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1203 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1204 * that if such an event is not handled above in splice, it will be handled here by
1205 * recv().
1206 */
Christopher Faulet7c42eac2018-04-17 14:33:47 +02001207 while (!(conn->flags & (CO_FL_ERROR | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE)) &&
Willy Tarreaub78b80e2017-12-12 09:58:40 +01001208 !(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 Tarreau6577b482017-12-10 21:19:33 +01001217 if (cs->flags & CS_FL_RCV_MORE)
Willy Tarreaudb398432018-11-15 11:08:52 +01001218 si_rx_room_blk(si);
Willy Tarreau6577b482017-12-10 21:19:33 +01001219
Christopher Fauleteffc3752018-10-31 08:53:54 +01001220 if (cs->flags & CS_FL_READ_PARTIAL) {
1221 if (tick_isset(ic->rex))
1222 ic->rex = tick_add_ifset(now_ms, ic->rto);
1223 cs->flags &= ~CS_FL_READ_PARTIAL;
1224 }
1225
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001226 if (ret <= 0) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001227 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001228 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001229
1230 cur_read += ret;
1231
1232 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001233 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001234 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001235 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1236 if (fwd > ic->to_forward)
1237 fwd = ic->to_forward;
1238 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001239 }
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001240 c_adv(ic, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001241 }
1242
Willy Tarreauafc8a222014-11-28 15:46:27 +01001243 ic->flags |= CF_READ_PARTIAL;
1244 ic->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001245
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001246 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
1247 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001248 si_rx_chan_blk(si);
Willy Tarreau62dd6982017-11-18 11:26:20 +01001249 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001250 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001251
1252 /* if too many bytes were missing from last read, it means that
1253 * it's pointless trying to read again because the system does
1254 * not have them in buffers.
1255 */
1256 if (ret < max) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001257 /* if a streamer has read few data, it may be because we
1258 * have exhausted system buffers. It's not worth trying
1259 * again.
1260 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001261 if (ic->flags & CF_STREAMER) {
1262 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001263 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001264 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001265 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001266
1267 /* if we read a large block smaller than what we requested,
1268 * it's almost certain we'll never get anything more.
1269 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001270 if (ret >= global.tune.recv_enough) {
1271 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001272 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001273 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001274 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001275 }
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001276
1277 /* if we are waiting for more space, don't try to read more data
1278 * right now.
1279 */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001280 if (si_rx_blocked(si))
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001281 break;
Willy Tarreauce323de2012-08-20 21:41:06 +02001282 } /* while !flags */
1283
Willy Tarreauffb12052018-11-15 16:06:02 +01001284 done_recv:
Willy Tarreauc5890e62014-02-09 17:47:01 +01001285 if (cur_read) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001286 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001287 (cur_read <= ic->buf.size / 2)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001288 ic->xfer_large = 0;
1289 ic->xfer_small++;
1290 if (ic->xfer_small >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001291 /* we have read less than half of the buffer in
1292 * one pass, and this happened at least 3 times.
1293 * This is definitely not a streamer.
1294 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001295 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001296 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001297 else if (ic->xfer_small >= 2) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001298 /* if the buffer has been at least half full twice,
1299 * we receive faster than we send, so at least it
1300 * is not a "fast streamer".
1301 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001302 ic->flags &= ~CF_STREAMER_FAST;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001303 }
1304 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001305 else if (!(ic->flags & CF_STREAMER_FAST) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001306 (cur_read >= ic->buf.size - global.tune.maxrewrite)) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001307 /* we read a full buffer at once */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001308 ic->xfer_small = 0;
1309 ic->xfer_large++;
1310 if (ic->xfer_large >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001311 /* we call this buffer a fast streamer if it manages
1312 * to be filled in one call 3 consecutive times.
1313 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001314 ic->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001315 }
1316 }
1317 else {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001318 ic->xfer_small = 0;
1319 ic->xfer_large = 0;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001320 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001321 ic->last_read = now_ms;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001322 }
1323
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001324 end_recv:
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001325 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001326 return 1;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001327
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001328 if (cs->flags & CS_FL_EOS)
Willy Tarreauce323de2012-08-20 21:41:06 +02001329 /* connection closed */
1330 goto out_shutdown_r;
1331
Willy Tarreau32742fd2018-11-14 14:07:59 +01001332 /* Subscribe to receive events if we're blocking on I/O */
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001333 if (!si_rx_blocked(si)) {
Olivier Houchard53216e72018-10-10 15:46:36 +02001334 conn->mux->subscribe(cs, SUB_CAN_RECV, &si->wait_event);
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001335 si_rx_endp_done(si);
1336 } else {
1337 si_rx_endp_more(si);
1338 }
Olivier Houchardf6535282018-08-31 17:29:12 +02001339
Willy Tarreau32742fd2018-11-14 14:07:59 +01001340 return (cur_read != 0) || si_rx_blocked(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001341
1342 out_shutdown_r:
1343 /* we received a shutdown */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001344 ic->flags |= CF_READ_NULL;
1345 if (ic->flags & CF_AUTO_CLOSE)
1346 channel_shutw_now(ic);
Willy Tarreauce323de2012-08-20 21:41:06 +02001347 stream_sock_read0(si);
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001348 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001349}
1350
1351/*
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001352 * This function propagates a null read received on a socket-based connection.
1353 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001354 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001355 */
1356void stream_sock_read0(struct stream_interface *si)
1357{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001358 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001359 struct channel *ic = si_ic(si);
1360 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001361
Willy Tarreauabb5d422018-11-14 16:58:52 +01001362 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001363 ic->flags &= ~CF_SHUTR_NOW;
1364 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001365 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001366 ic->flags |= CF_SHUTR;
1367 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001368
1369 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1370 return;
1371
Willy Tarreauafc8a222014-11-28 15:46:27 +01001372 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001373 goto do_close;
1374
1375 if (si->flags & SI_FL_NOHALF) {
1376 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001377 /* force flag on ssl to keep stream in cache */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001378 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001379 goto do_close;
1380 }
1381
1382 /* otherwise that's just a normal read shutdown */
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001383 return;
1384
1385 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001386 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaua553ae92017-10-05 18:52:17 +02001387 cs_close(cs);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001388
Willy Tarreauafc8a222014-11-28 15:46:27 +01001389 oc->flags &= ~CF_SHUTW_NOW;
1390 oc->flags |= CF_SHUTW;
1391 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001392
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001393 si_done_get(si);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001394
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001395 si->state = SI_ST_DIS;
1396 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001397 return;
1398}
1399
Willy Tarreau651e1822015-09-23 20:06:13 +02001400/* Callback to be used by applet handlers upon completion. It updates the stream
1401 * (which may or may not take this opportunity to try to forward data), then
Emeric Brun2802b072017-06-30 14:11:56 +02001402 * may re-enable the applet's based on the channels and stream interface's final
Willy Tarreau651e1822015-09-23 20:06:13 +02001403 * states.
1404 */
Willy Tarreauaa977ba2015-09-25 11:45:06 +02001405void si_applet_wake_cb(struct stream_interface *si)
Willy Tarreaue5f86492015-04-19 15:16:35 +02001406{
Willy Tarreaueca572f2015-09-25 19:11:55 +02001407 struct channel *ic = si_ic(si);
1408
1409 /* If the applet wants to write and the channel is closed, it's a
1410 * broken pipe and it must be reported.
1411 */
Willy Tarreau05b9b642018-11-14 13:43:35 +01001412 if (!(si->flags & SI_FL_RX_WAIT_EP) && (ic->flags & CF_SHUTR))
Willy Tarreaueca572f2015-09-25 19:11:55 +02001413 si->flags |= SI_FL_ERR;
1414
Willy Tarreau186dcdd2018-11-16 16:18:34 +01001415 /* automatically mark the applet having data available if it reported
1416 * begin blocked by the channel.
1417 */
1418 if (si_rx_blocked(si))
1419 si_rx_endp_more(si);
1420
Willy Tarreau651e1822015-09-23 20:06:13 +02001421 /* update the stream-int, channels, and possibly wake the stream up */
1422 stream_int_notify(si);
Willy Tarreaue5f86492015-04-19 15:16:35 +02001423
Willy Tarreau32742fd2018-11-14 14:07:59 +01001424 /* stream_int_notify may have passed through chk_snd and released some
1425 * RXBLK flags. Process_stream will consider those flags to wake up the
1426 * appctx but in the case the task is not in runqueue we may have to
1427 * wakeup the appctx immediately.
Emeric Brun2802b072017-06-30 14:11:56 +02001428 */
Willy Tarreaud0d40eb2018-11-09 14:56:01 +01001429 if (!task_in_rq(si_task(si)) &&
Willy Tarreau32742fd2018-11-14 14:07:59 +01001430 ((si_rx_endp_ready(si) && !si_rx_blocked(si)) ||
1431 (si_tx_endp_ready(si) && !si_tx_blocked(si))))
Willy Tarreau563cc372015-04-19 18:13:56 +02001432 appctx_wakeup(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001433}
1434
1435/*
1436 * This function performs a shutdown-read on a stream interface attached to an
1437 * applet in a connected or init state (it does nothing for other states). It
1438 * either shuts the read side or marks itself as closed. The buffer flags are
1439 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1440 * we also forward the close to the write side. The owner task is woken up if
1441 * it exists.
1442 */
1443static void stream_int_shutr_applet(struct stream_interface *si)
1444{
1445 struct channel *ic = si_ic(si);
1446
Willy Tarreauabb5d422018-11-14 16:58:52 +01001447 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001448 ic->flags &= ~CF_SHUTR_NOW;
1449 if (ic->flags & CF_SHUTR)
1450 return;
1451 ic->flags |= CF_SHUTR;
1452 ic->rex = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001453
Willy Tarreau828824a2015-04-19 17:20:03 +02001454 /* Note: on shutr, we don't call the applet */
1455
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001456 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1457 return;
1458
1459 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau958f0742015-09-25 20:24:26 +02001460 si_applet_release(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001461 si->state = SI_ST_DIS;
1462 si->exp = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001463 }
1464 else if (si->flags & SI_FL_NOHALF) {
1465 /* we want to immediately forward this close to the write side */
1466 return stream_int_shutw_applet(si);
1467 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001468}
1469
1470/*
1471 * This function performs a shutdown-write on a stream interface attached to an
1472 * applet in a connected or init state (it does nothing for other states). It
1473 * either shuts the write side or marks itself as closed. The buffer flags are
1474 * updated to reflect the new state. It does also close everything if the SI
1475 * was marked as being in error state. The owner task is woken up if it exists.
1476 */
1477static void stream_int_shutw_applet(struct stream_interface *si)
1478{
1479 struct channel *ic = si_ic(si);
1480 struct channel *oc = si_oc(si);
1481
1482 oc->flags &= ~CF_SHUTW_NOW;
1483 if (oc->flags & CF_SHUTW)
1484 return;
1485 oc->flags |= CF_SHUTW;
1486 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001487 si_done_get(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001488
Hongbo Longe39683c2017-03-10 18:41:51 +01001489 if (tick_isset(si->hcto)) {
1490 ic->rto = si->hcto;
1491 ic->rex = tick_add(now_ms, ic->rto);
1492 }
1493
Willy Tarreau828824a2015-04-19 17:20:03 +02001494 /* on shutw we always wake the applet up */
1495 appctx_wakeup(si_appctx(si));
1496
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001497 switch (si->state) {
1498 case SI_ST_EST:
1499 /* we have to shut before closing, otherwise some short messages
1500 * may never leave the system, especially when there are remaining
1501 * unread data in the socket input buffer, or when nolinger is set.
1502 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1503 * no risk so we close both sides immediately.
1504 */
1505 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1506 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1507 return;
1508
1509 /* fall through */
1510 case SI_ST_CON:
1511 case SI_ST_CER:
1512 case SI_ST_QUE:
1513 case SI_ST_TAR:
1514 /* Note that none of these states may happen with applets */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001515 si_applet_release(si);
Willy Tarreau958f0742015-09-25 20:24:26 +02001516 si->state = SI_ST_DIS;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001517 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +01001518 si->flags &= ~SI_FL_NOLINGER;
1519 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001520 ic->flags &= ~CF_SHUTR_NOW;
1521 ic->flags |= CF_SHUTR;
1522 ic->rex = TICK_ETERNITY;
1523 si->exp = TICK_ETERNITY;
1524 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001525}
1526
1527/* chk_rcv function for applets */
1528static void stream_int_chk_rcv_applet(struct stream_interface *si)
1529{
1530 struct channel *ic = si_ic(si);
1531
1532 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1533 __FUNCTION__,
1534 si, si->state, ic->flags, si_oc(si)->flags);
1535
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001536 if (!ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001537 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001538 appctx_wakeup(si_appctx(si));
Thierry FOURNIER5bc2cbf2015-09-04 18:40:36 +02001539 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001540}
1541
1542/* chk_snd function for applets */
1543static void stream_int_chk_snd_applet(struct stream_interface *si)
1544{
1545 struct channel *oc = si_oc(si);
1546
1547 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1548 __FUNCTION__,
1549 si, si->state, si_ic(si)->flags, oc->flags);
1550
1551 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1552 return;
1553
Willy Tarreau828824a2015-04-19 17:20:03 +02001554 /* we only wake the applet up if it was waiting for some data */
1555
1556 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001557 return;
1558
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001559 if (!tick_isset(oc->wex))
1560 oc->wex = tick_add_ifset(now_ms, oc->wto);
1561
Willy Tarreau828824a2015-04-19 17:20:03 +02001562 if (!channel_is_empty(oc)) {
1563 /* (re)start sending */
1564 appctx_wakeup(si_appctx(si));
1565 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001566}
1567
Willy Tarreaudded32d2008-11-30 19:48:07 +01001568/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001569 * Local variables:
1570 * c-indent-level: 8
1571 * c-basic-offset: 8
1572 * End:
1573 */