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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 Houcharda254a372019-04-05 15:30:12 +020033#include <proto/http_htx.h>
Olivier Houchard9aaf7782017-09-13 18:30:23 +020034#include <proto/mux_pt.h>
Willy Tarreau96199b12012-08-24 00:46:52 +020035#include <proto/pipe.h>
Olivier Houcharda254a372019-04-05 15:30:12 +020036#include <proto/proxy.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020037#include <proto/stream.h>
Willy Tarreau269358d2009-09-20 20:14:49 +020038#include <proto/stream_interface.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010039#include <proto/task.h>
40
Willy Tarreaufd31e532012-07-23 18:24:25 +020041#include <types/pipe.h>
42
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010043/* functions used by default on a detached stream-interface */
Willy Tarreau6fe15412013-09-29 15:16:03 +020044static void stream_int_shutr(struct stream_interface *si);
45static void stream_int_shutw(struct stream_interface *si);
Willy Tarreauf873d752012-05-11 17:47:17 +020046static void stream_int_chk_rcv(struct stream_interface *si);
47static void stream_int_chk_snd(struct stream_interface *si);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010048
49/* functions used on a conn_stream-based stream-interface */
Willy Tarreau6fe15412013-09-29 15:16:03 +020050static void stream_int_shutr_conn(struct stream_interface *si);
51static void stream_int_shutw_conn(struct stream_interface *si);
Willy Tarreauc5788912012-08-24 18:12:41 +020052static void stream_int_chk_rcv_conn(struct stream_interface *si);
53static void stream_int_chk_snd_conn(struct stream_interface *si);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010054
55/* functions used on an applet-based stream-interface */
Willy Tarreaud45b9f82015-04-13 16:30:14 +020056static void stream_int_shutr_applet(struct stream_interface *si);
57static void stream_int_shutw_applet(struct stream_interface *si);
58static void stream_int_chk_rcv_applet(struct stream_interface *si);
59static void stream_int_chk_snd_applet(struct stream_interface *si);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010060
61/* last read notification */
62static void stream_int_read0(struct stream_interface *si);
63
64/* post-IO notification callback */
65static void stream_int_notify(struct stream_interface *si);
Willy Tarreauf873d752012-05-11 17:47:17 +020066
Willy Tarreauc5788912012-08-24 18:12:41 +020067/* stream-interface operations for embedded tasks */
68struct si_ops si_embedded_ops = {
Willy Tarreau5c979a92012-05-07 17:15:39 +020069 .chk_rcv = stream_int_chk_rcv,
70 .chk_snd = stream_int_chk_snd,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020071 .shutr = stream_int_shutr,
72 .shutw = stream_int_shutw,
Willy Tarreau5c979a92012-05-07 17:15:39 +020073};
74
Willy Tarreauc5788912012-08-24 18:12:41 +020075/* stream-interface operations for connections */
76struct si_ops si_conn_ops = {
Willy Tarreauc5788912012-08-24 18:12:41 +020077 .chk_rcv = stream_int_chk_rcv_conn,
78 .chk_snd = stream_int_chk_snd_conn,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020079 .shutr = stream_int_shutr_conn,
80 .shutw = stream_int_shutw_conn,
Willy Tarreauc5788912012-08-24 18:12:41 +020081};
82
Willy Tarreaud45b9f82015-04-13 16:30:14 +020083/* stream-interface operations for connections */
84struct si_ops si_applet_ops = {
Willy Tarreaud45b9f82015-04-13 16:30:14 +020085 .chk_rcv = stream_int_chk_rcv_applet,
86 .chk_snd = stream_int_chk_snd_applet,
87 .shutr = stream_int_shutr_applet,
88 .shutw = stream_int_shutw_applet,
89};
90
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010091
92/* Functions used to communicate with a conn_stream. The first two may be used
93 * directly, the last one is mostly a wake callback.
94 */
95int si_cs_recv(struct conn_stream *cs);
96int si_cs_send(struct conn_stream *cs);
97static int si_cs_process(struct conn_stream *cs);
98
99
Willy Tarreau74beec32012-10-03 00:41:04 +0200100struct data_cb si_conn_cb = {
Olivier Houchard21df6cc2018-09-14 23:21:44 +0200101 .wake = si_cs_process,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +0100102 .name = "STRM",
Willy Tarreauc5788912012-08-24 18:12:41 +0200103};
104
Willy Tarreaucff64112008-11-03 06:26:53 +0100105/*
106 * This function only has to be called once after a wakeup event in case of
107 * suspected timeout. It controls the stream interface timeouts and sets
108 * si->flags accordingly. It does NOT close anything, as this timeout may
109 * be used for any purpose. It returns 1 if the timeout fired, otherwise
110 * zero.
111 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100112int si_check_timeouts(struct stream_interface *si)
Willy Tarreaucff64112008-11-03 06:26:53 +0100113{
114 if (tick_is_expired(si->exp, now_ms)) {
115 si->flags |= SI_FL_EXP;
116 return 1;
117 }
118 return 0;
119}
120
Willy Tarreaufe3718a2008-11-30 18:14:12 +0100121/* to be called only when in SI_ST_DIS with SI_FL_ERR */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100122void si_report_error(struct stream_interface *si)
Willy Tarreaucff64112008-11-03 06:26:53 +0100123{
124 if (!si->err_type)
125 si->err_type = SI_ET_DATA_ERR;
126
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100127 si_oc(si)->flags |= CF_WRITE_ERROR;
128 si_ic(si)->flags |= CF_READ_ERROR;
Willy Tarreaucff64112008-11-03 06:26:53 +0100129}
130
131/*
Willy Tarreaudded32d2008-11-30 19:48:07 +0100132 * Returns a message to the client ; the connection is shut down for read,
133 * and the request is cleared so that no server connection can be initiated.
134 * The buffer is marked for read shutdown on the other side to protect the
135 * message, and the buffer write is enabled. The message is contained in a
Willy Tarreau148d0992010-01-10 10:21:21 +0100136 * "chunk". If it is null, then an empty message is used. The reply buffer does
137 * not need to be empty before this, and its contents will not be overwritten.
138 * The primary goal of this function is to return error messages to a client.
Willy Tarreaudded32d2008-11-30 19:48:07 +0100139 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100140void si_retnclose(struct stream_interface *si,
Willy Tarreau83061a82018-07-13 11:56:34 +0200141 const struct buffer *msg)
Willy Tarreaudded32d2008-11-30 19:48:07 +0100142{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100143 struct channel *ic = si_ic(si);
144 struct channel *oc = si_oc(si);
145
146 channel_auto_read(ic);
147 channel_abort(ic);
148 channel_auto_close(ic);
149 channel_erase(ic);
150 channel_truncate(oc);
Willy Tarreau798e1282010-12-12 13:06:00 +0100151
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200152 if (likely(msg && msg->data))
153 co_inject(oc, msg->area, msg->data);
Willy Tarreaudded32d2008-11-30 19:48:07 +0100154
Willy Tarreauafc8a222014-11-28 15:46:27 +0100155 oc->wex = tick_add_ifset(now_ms, oc->wto);
156 channel_auto_read(oc);
157 channel_auto_close(oc);
158 channel_shutr_now(oc);
Willy Tarreau5d881d02009-12-27 22:51:06 +0100159}
160
Willy Tarreau4a36b562012-08-06 19:31:45 +0200161/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200162 * This function performs a shutdown-read on a detached stream interface in a
163 * connected or init state (it does nothing for other states). It either shuts
164 * the read side or marks itself as closed. The buffer flags are updated to
165 * reflect the new state. If the stream interface has SI_FL_NOHALF, we also
166 * forward the close to the write side. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200167 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200168static void stream_int_shutr(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200169{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100170 struct channel *ic = si_ic(si);
171
Willy Tarreauabb5d422018-11-14 16:58:52 +0100172 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100173 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200174 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100175 ic->flags |= CF_SHUTR;
176 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200177
Willy Tarreau4f283fa2019-06-05 14:34:03 +0200178 if (!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200179 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200180
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100181 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200182 si->state = SI_ST_DIS;
183 si->exp = TICK_ETERNITY;
Willy Tarreaud8ccffe2010-09-07 16:16:50 +0200184 }
Willy Tarreau4a36b562012-08-06 19:31:45 +0200185 else if (si->flags & SI_FL_NOHALF) {
186 /* we want to immediately forward this close to the write side */
187 return stream_int_shutw(si);
188 }
Willy Tarreau0bd05ea2010-07-02 11:18:03 +0200189
Willy Tarreau4a36b562012-08-06 19:31:45 +0200190 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100191 if (!(si->flags & SI_FL_DONT_WAKE))
192 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200193}
194
Willy Tarreau4a36b562012-08-06 19:31:45 +0200195/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200196 * This function performs a shutdown-write on a detached stream interface in a
197 * connected or init state (it does nothing for other states). It either shuts
198 * the write side or marks itself as closed. The buffer flags are updated to
199 * reflect the new state. It does also close everything if the SI was marked as
200 * being in error state. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200201 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200202static void stream_int_shutw(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200203{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100204 struct channel *ic = si_ic(si);
205 struct channel *oc = si_oc(si);
206
207 oc->flags &= ~CF_SHUTW_NOW;
208 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200209 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100210 oc->flags |= CF_SHUTW;
211 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +0100212 si_done_get(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200213
Hongbo Longe39683c2017-03-10 18:41:51 +0100214 if (tick_isset(si->hcto)) {
215 ic->rto = si->hcto;
216 ic->rex = tick_add(now_ms, ic->rto);
217 }
218
Willy Tarreaufb90d942009-09-05 20:57:35 +0200219 switch (si->state) {
Willy Tarreau4f283fa2019-06-05 14:34:03 +0200220 case SI_ST_RDY:
Willy Tarreaufb90d942009-09-05 20:57:35 +0200221 case SI_ST_EST:
Willy Tarreau4a36b562012-08-06 19:31:45 +0200222 /* we have to shut before closing, otherwise some short messages
223 * may never leave the system, especially when there are remaining
224 * unread data in the socket input buffer, or when nolinger is set.
225 * However, if SI_FL_NOLINGER is explicitly set, we know there is
226 * no risk so we close both sides immediately.
227 */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200228 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
Willy Tarreauafc8a222014-11-28 15:46:27 +0100229 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200230 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200231
232 /* fall through */
233 case SI_ST_CON:
234 case SI_ST_CER:
Willy Tarreau32d3ee92010-12-29 14:03:02 +0100235 case SI_ST_QUE:
236 case SI_ST_TAR:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200237 /* Note that none of these states may happen with applets */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200238 si->state = SI_ST_DIS;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200239 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +0100240 si->flags &= ~SI_FL_NOLINGER;
241 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100242 ic->flags |= CF_SHUTR;
243 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200244 si->exp = TICK_ETERNITY;
245 }
246
Willy Tarreau4a36b562012-08-06 19:31:45 +0200247 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100248 if (!(si->flags & SI_FL_DONT_WAKE))
249 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200250}
251
252/* default chk_rcv function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200253static void stream_int_chk_rcv(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200254{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100255 struct channel *ic = si_ic(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200256
Willy Tarreauafc8a222014-11-28 15:46:27 +0100257 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200258 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100259 si, si->state, ic->flags, si_oc(si)->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200260
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200261 if (ic->pipe) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200262 /* stop reading */
Willy Tarreaudb398432018-11-15 11:08:52 +0100263 si_rx_room_blk(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200264 }
265 else {
266 /* (re)start reading */
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200267 tasklet_wakeup(si->wait_event.tasklet);
Willy Tarreau07373b82014-11-28 12:08:47 +0100268 if (!(si->flags & SI_FL_DONT_WAKE))
269 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200270 }
271}
272
273/* default chk_snd function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200274static void stream_int_chk_snd(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200275{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100276 struct channel *oc = si_oc(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200277
Willy Tarreauafc8a222014-11-28 15:46:27 +0100278 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200279 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100280 si, si->state, si_ic(si)->flags, oc->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200281
Willy Tarreauafc8a222014-11-28 15:46:27 +0100282 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200283 return;
284
285 if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100286 channel_is_empty(oc)) /* called with nothing to send ! */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200287 return;
288
289 /* Otherwise there are remaining data to be sent in the buffer,
290 * so we tell the handler.
291 */
292 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100293 if (!tick_isset(oc->wex))
294 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200295
Willy Tarreau07373b82014-11-28 12:08:47 +0100296 if (!(si->flags & SI_FL_DONT_WAKE))
297 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200298}
299
Willy Tarreaua9ff5e62015-07-19 18:46:30 +0200300/* Register an applet to handle a stream_interface as a new appctx. The SI will
301 * wake it up everytime it is solicited. The appctx must be deleted by the task
302 * handler using si_release_endpoint(), possibly from within the function itself.
303 * It also pre-initializes the applet's context and returns it (or NULL in case
304 * it could not be allocated).
Willy Tarreaufb90d942009-09-05 20:57:35 +0200305 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100306struct appctx *si_register_handler(struct stream_interface *si, struct applet *app)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200307{
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100308 struct appctx *appctx;
309
Willy Tarreau07373b82014-11-28 12:08:47 +0100310 DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si_task(si));
Willy Tarreaufb90d942009-09-05 20:57:35 +0200311
Willy Tarreaua7513f52015-04-05 00:15:26 +0200312 appctx = si_alloc_appctx(si, app);
Willy Tarreaua69fc9f2014-12-22 19:34:00 +0100313 if (!appctx)
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100314 return NULL;
315
Willy Tarreau0cd3bd62018-11-06 18:46:37 +0100316 si_cant_get(si);
Willy Tarreau828824a2015-04-19 17:20:03 +0200317 appctx_wakeup(appctx);
Willy Tarreau1fbe1c92013-12-01 09:35:41 +0100318 return si_appctx(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200319}
320
Willy Tarreau2c6be842012-07-06 17:12:34 +0200321/* This callback is used to send a valid PROXY protocol line to a socket being
Willy Tarreauafad0e02012-08-09 14:45:22 +0200322 * established. It returns 0 if it fails in a fatal way or needs to poll to go
323 * further, otherwise it returns non-zero and removes itself from the connection's
Willy Tarreaua1a74742012-08-24 12:14:49 +0200324 * flags (the bit is provided in <flag> by the caller). It is designed to be
325 * called by the connection handler and relies on it to commit polling changes.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200326 * Note that it can emit a PROXY line by relying on the other end's address
327 * when the connection is attached to a stream interface, or by resolving the
328 * local address otherwise (also called a LOCAL line).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200329 */
330int conn_si_send_proxy(struct connection *conn, unsigned int flag)
331{
Willy Tarreau2c6be842012-07-06 17:12:34 +0200332 /* we might have been called just after an asynchronous shutw */
Willy Tarreaua1a74742012-08-24 12:14:49 +0200333 if (conn->flags & CO_FL_SOCK_WR_SH)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200334 goto out_error;
335
Willy Tarreaud02cdd22013-12-15 10:23:20 +0100336 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200337 goto out_error;
338
Willy Tarreau2c6be842012-07-06 17:12:34 +0200339 /* If we have a PROXY line to send, we'll use this to validate the
340 * connection, in which case the connection is validated only once
341 * we've sent the whole proxy line. Otherwise we use connect().
342 */
Tim Duesterhus36839dc2019-02-26 17:09:51 +0100343 if (conn->send_proxy_ofs) {
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100344 const struct conn_stream *cs;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200345 int ret;
346
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100347 cs = cs_get_first(conn);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200348 /* The target server expects a PROXY line to be sent first.
349 * If the send_proxy_ofs is negative, it corresponds to the
350 * offset to start sending from then end of the proxy string
351 * (which is recomputed every time since it's constant). If
352 * it is positive, it means we have to send from the start.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200353 * We can only send a "normal" PROXY line when the connection
354 * is attached to a stream interface. Otherwise we can only
355 * send a LOCAL line (eg: for use with health checks).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200356 */
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100357
358 if (cs && cs->data_cb == &si_conn_cb) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200359 struct stream_interface *si = cs->data;
360 struct conn_stream *remote_cs = objt_cs(si_opposite(si)->end);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200361 ret = make_proxy_line(trash.area, trash.size,
362 objt_server(conn->target),
363 remote_cs ? remote_cs->conn : NULL);
Olivier Houchard661167d2019-05-29 17:08:03 +0200364 /* We may not have a conn_stream yet, if we don't
365 * know which mux to use, because it will be decided
366 * during the SSL handshake. In this case, there should
367 * be a session associated to the connection in
368 * conn->owner, and we know it is the session that
369 * initiated that connection, so we can just use
370 * its origin, which should contain the client
371 * connection.
372 */
373 } else if (!cs && conn->owner) {
374 struct session *sess = conn->owner;
375
376 ret = make_proxy_line(trash.area, trash.size,
377 objt_server(conn->target),
378 objt_conn(sess->origin));
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200379 }
380 else {
381 /* The target server expects a LOCAL line to be sent first. Retrieving
382 * local or remote addresses may fail until the connection is established.
383 */
Willy Tarreau7bb447c2019-07-17 11:40:51 +0200384 if (!conn_get_src(conn) || !conn_get_dst(conn))
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200385 goto out_wait;
386
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200387 ret = make_proxy_line(trash.area, trash.size,
388 objt_server(conn->target), conn);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200389 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200390
Willy Tarreau2c6be842012-07-06 17:12:34 +0200391 if (!ret)
392 goto out_error;
393
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200394 if (conn->send_proxy_ofs > 0)
395 conn->send_proxy_ofs = -ret; /* first call */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200396
Willy Tarreaua1a74742012-08-24 12:14:49 +0200397 /* we have to send trash from (ret+sp for -sp bytes). If the
398 * data layer has a pending write, we'll also set MSG_MORE.
399 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200400 ret = conn_sock_send(conn,
401 trash.area + ret + conn->send_proxy_ofs,
402 -conn->send_proxy_ofs,
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200403 (conn->flags & CO_FL_XPRT_WR_ENA) ? MSG_MORE : 0);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200404
Willy Tarreau0a03c0f2015-03-13 00:05:28 +0100405 if (ret < 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200406 goto out_error;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200407
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200408 conn->send_proxy_ofs += ret; /* becomes zero once complete */
409 if (conn->send_proxy_ofs != 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200410 goto out_wait;
411
412 /* OK we've sent the whole line, we're connected */
413 }
414
Willy Tarreaua1a74742012-08-24 12:14:49 +0200415 /* The connection is ready now, simply return and let the connection
416 * handler notify upper layers if needed.
Willy Tarreau2c6be842012-07-06 17:12:34 +0200417 */
418 if (conn->flags & CO_FL_WAIT_L4_CONN)
419 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200420 conn->flags &= ~flag;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200421 return 1;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200422
423 out_error:
Willy Tarreauafad0e02012-08-09 14:45:22 +0200424 /* Write error on the file descriptor */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200425 conn->flags |= CO_FL_ERROR;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200426 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200427
428 out_wait:
Willy Tarreauafad0e02012-08-09 14:45:22 +0200429 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200430}
431
Willy Tarreau27375622013-12-17 00:00:28 +0100432
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100433/* This function is the equivalent to si_update() except that it's
Willy Tarreau615f28b2015-09-23 18:40:09 +0200434 * designed to be called from outside the stream handlers, typically the lower
435 * layers (applets, connections) after I/O completion. After updating the stream
436 * interface and timeouts, it will try to forward what can be forwarded, then to
437 * wake the associated task up if an important event requires special handling.
Willy Tarreaud0f5bbc2018-11-14 11:10:26 +0100438 * It may update SI_FL_WAIT_DATA and/or SI_FL_RXBLK_ROOM, that the callers are
Willy Tarreau0dfccb22018-10-25 13:55:20 +0200439 * encouraged to watch to take appropriate action.
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100440 * It should not be called from within the stream itself, si_update()
Willy Tarreau615f28b2015-09-23 18:40:09 +0200441 * is designed for this.
442 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100443static void stream_int_notify(struct stream_interface *si)
Willy Tarreau615f28b2015-09-23 18:40:09 +0200444{
445 struct channel *ic = si_ic(si);
446 struct channel *oc = si_oc(si);
Willy Tarreau47baeb82018-11-15 07:46:57 +0100447 struct stream_interface *sio = si_opposite(si);
Christopher Fauletd7607de2019-01-03 16:24:54 +0100448 struct task *task = si_task(si);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200449
450 /* process consumer side */
451 if (channel_is_empty(oc)) {
Olivier Houcharde9bed532017-11-16 17:49:25 +0100452 struct connection *conn = objt_cs(si->end) ? objt_cs(si->end)->conn : NULL;
453
Willy Tarreau615f28b2015-09-23 18:40:09 +0200454 if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) &&
Olivier Houcharde9bed532017-11-16 17:49:25 +0100455 (si->state == SI_ST_EST) && (!conn || !(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS))))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200456 si_shutw(si);
457 oc->wex = TICK_ETERNITY;
458 }
459
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100460 /* indicate that we may be waiting for data from the output channel or
461 * we're about to close and can't expect more data if SHUTW_NOW is there.
462 */
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200463 if (!(oc->flags & (CF_SHUTW|CF_SHUTW_NOW)))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200464 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100465 else if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)
466 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200467
468 /* update OC timeouts and wake the other side up if it's waiting for room */
469 if (oc->flags & CF_WRITE_ACTIVITY) {
470 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
471 !channel_is_empty(oc))
472 if (tick_isset(oc->wex))
473 oc->wex = tick_add_ifset(now_ms, oc->wto);
474
475 if (!(si->flags & SI_FL_INDEP_STR))
476 if (tick_isset(ic->rex))
477 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreauf26c26c2018-11-12 16:11:08 +0100478 }
Willy Tarreau615f28b2015-09-23 18:40:09 +0200479
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100480 if (oc->flags & CF_DONT_READ)
481 si_rx_chan_blk(sio);
482 else
483 si_rx_chan_rdy(sio);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200484
485 /* Notify the other side when we've injected data into the IC that
486 * needs to be forwarded. We can do fast-forwarding as soon as there
487 * are output data, but we avoid doing this if some of the data are
488 * not yet scheduled for being forwarded, because it is very likely
489 * that it will be done again immediately afterwards once the following
Willy Tarreaud0f5bbc2018-11-14 11:10:26 +0100490 * data are parsed (eg: HTTP chunking). We only SI_FL_RXBLK_ROOM once
Willy Tarreau615f28b2015-09-23 18:40:09 +0200491 * we've emptied *some* of the output buffer, and not just when there
492 * is available room, because applets are often forced to stop before
493 * the buffer is full. We must not stop based on input data alone because
494 * an HTTP parser might need more data to complete the parsing.
495 */
496 if (!channel_is_empty(ic) &&
Willy Tarreau47baeb82018-11-15 07:46:57 +0100497 (sio->flags & SI_FL_WAIT_DATA) &&
Willy Tarreau89b6a2b2018-11-18 15:46:10 +0100498 (!(ic->flags & CF_EXPECT_MORE) || c_full(ic) || ci_data(ic) == 0 || ic->pipe)) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200499 int new_len, last_len;
500
Willy Tarreau77e478c2018-06-19 07:03:14 +0200501 last_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200502 if (ic->pipe)
503 last_len += ic->pipe->data;
504
Willy Tarreau47baeb82018-11-15 07:46:57 +0100505 si_chk_snd(sio);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200506
Willy Tarreau77e478c2018-06-19 07:03:14 +0200507 new_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200508 if (ic->pipe)
509 new_len += ic->pipe->data;
510
511 /* check if the consumer has freed some space either in the
512 * buffer or in the pipe.
513 */
Willy Tarreau47baeb82018-11-15 07:46:57 +0100514 if (new_len < last_len)
Willy Tarreaudb398432018-11-15 11:08:52 +0100515 si_rx_room_rdy(si);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200516 }
517
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100518 if (!(ic->flags & CF_DONT_READ))
519 si_rx_chan_rdy(si);
520
Willy Tarreau47baeb82018-11-15 07:46:57 +0100521 si_chk_rcv(si);
522 si_chk_rcv(sio);
523
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100524 if (si_rx_blocked(si)) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200525 ic->rex = TICK_ETERNITY;
526 }
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100527 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL)) == CF_READ_PARTIAL) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200528 /* we must re-enable reading if si_chk_snd() has freed some space */
529 if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex))
530 ic->rex = tick_add_ifset(now_ms, ic->rto);
531 }
532
533 /* wake the task up only when needed */
534 if (/* changes on the production side */
535 (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
Willy Tarreau4f283fa2019-06-05 14:34:03 +0200536 !si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST) ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200537 (si->flags & SI_FL_ERR) ||
538 ((ic->flags & CF_READ_PARTIAL) &&
Christopher Faulet297d3e22019-03-22 14:16:14 +0100539 ((ic->flags & CF_EOI) || !ic->to_forward || sio->state != SI_ST_EST)) ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200540
541 /* changes on the consumption side */
542 (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
Willy Tarreauede3d882018-10-24 17:17:56 +0200543 ((oc->flags & CF_WRITE_ACTIVITY) &&
Willy Tarreau615f28b2015-09-23 18:40:09 +0200544 ((oc->flags & CF_SHUTW) ||
Willy Tarreau78f5ff82018-12-19 11:00:00 +0100545 (((oc->flags & CF_WAKE_WRITE) ||
546 !(oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW|CF_SHUTW))) &&
Willy Tarreau47baeb82018-11-15 07:46:57 +0100547 (sio->state != SI_ST_EST ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200548 (channel_is_empty(oc) && !oc->to_forward)))))) {
Christopher Fauletd7607de2019-01-03 16:24:54 +0100549 task_wakeup(task, TASK_WOKEN_IO);
550 }
551 else {
552 /* Update expiration date for the task and requeue it */
553 task->expire = tick_first((tick_is_expired(task->expire, now_ms) ? 0 : task->expire),
554 tick_first(tick_first(ic->rex, ic->wex),
555 tick_first(oc->rex, oc->wex)));
Willy Tarreau45bcb372019-08-01 18:51:38 +0200556
557 task->expire = tick_first(task->expire, ic->analyse_exp);
558 task->expire = tick_first(task->expire, oc->analyse_exp);
559
560 if (si->exp)
561 task->expire = tick_first(task->expire, si->exp);
562
563 if (sio->exp)
564 task->expire = tick_first(task->expire, sio->exp);
565
Christopher Fauletd7607de2019-01-03 16:24:54 +0100566 task_queue(task);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200567 }
568 if (ic->flags & CF_READ_ACTIVITY)
569 ic->flags &= ~CF_READ_DONTWAIT;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200570}
571
572
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200573/* Called by I/O handlers after completion.. It propagates
Willy Tarreau651e1822015-09-23 20:06:13 +0200574 * connection flags to the stream interface, updates the stream (which may or
575 * may not take this opportunity to try to forward data), then update the
576 * connection's polling based on the channels and stream interface's final
577 * states. The function always returns 0.
Willy Tarreau100c4672012-08-20 12:06:26 +0200578 */
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200579static int si_cs_process(struct conn_stream *cs)
Willy Tarreaufd31e532012-07-23 18:24:25 +0200580{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200581 struct connection *conn = cs->conn;
582 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100583 struct channel *ic = si_ic(si);
584 struct channel *oc = si_oc(si);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200585
Olivier Houchardc7ffa912018-08-28 19:37:41 +0200586 /* If we have data to send, try it now */
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100587 if (!channel_is_empty(oc) && !(si->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau908d26f2018-10-25 14:02:47 +0200588 si_cs_send(cs);
589
Willy Tarreau651e1822015-09-23 20:06:13 +0200590 /* First step, report to the stream-int what was detected at the
591 * connection layer : errors and connection establishment.
Olivier Houchardc31e2cb2019-06-24 16:08:08 +0200592 * Only add SI_FL_ERR if we're connected, or we're attempting to
593 * connect, we may get there because we got woken up, but only run
594 * after process_stream() noticed there were an error, and decided
595 * to retry to connect, the connection may still have CO_FL_ERROR,
596 * and we don't want to add SI_FL_ERR back
Willy Tarreau651e1822015-09-23 20:06:13 +0200597 */
Olivier Houchardc31e2cb2019-06-24 16:08:08 +0200598 if (si->state >= SI_ST_CON &&
599 (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR))
Willy Tarreau3c55ec22012-07-23 19:19:51 +0200600 si->flags |= SI_FL_ERR;
601
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200602 /* If we had early data, and the handshake ended, then
603 * we can remove the flag, and attempt to wake the task up,
604 * in the event there's an analyser waiting for the end of
605 * the handshake.
606 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +0100607 if (!(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS)) &&
608 (cs->flags & CS_FL_WAIT_FOR_HS)) {
609 cs->flags &= ~CS_FL_WAIT_FOR_HS;
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200610 task_wakeup(si_task(si), TASK_WOKEN_MSG);
611 }
612
Willy Tarreau7ab22adb2019-06-05 14:53:22 +0200613 if (!si_state_in(si->state, SI_SB_EST|SI_SB_DIS|SI_SB_CLO) &&
Willy Tarreau52821e22017-03-18 17:11:37 +0100614 (conn->flags & (CO_FL_CONNECTED | CO_FL_HANDSHAKE)) == CO_FL_CONNECTED) {
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200615 si->exp = TICK_ETERNITY;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100616 oc->flags |= CF_WRITE_NULL;
Willy Tarreaub27f54a2019-06-05 16:43:44 +0200617 if (si->state == SI_ST_CON)
618 si->state = SI_ST_RDY;
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200619 }
620
Christopher Faulet297d3e22019-03-22 14:16:14 +0100621 /* Report EOI on the channel if it was reached from the mux point of
622 * view. */
623 if ((cs->flags & CS_FL_EOI) && !(ic->flags & CF_EOI))
Christopher Faulet8e9e3ef2019-05-17 09:14:10 +0200624 ic->flags |= (CF_EOI|CF_READ_PARTIAL);
Christopher Faulet203b2b02019-03-08 09:23:46 +0100625
Willy Tarreau651e1822015-09-23 20:06:13 +0200626 /* Second step : update the stream-int and channels, try to forward any
627 * pending data, then possibly wake the stream up based on the new
628 * stream-int status.
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200629 */
Willy Tarreau651e1822015-09-23 20:06:13 +0200630 stream_int_notify(si);
Willy Tarreaua64c7032019-08-01 14:17:02 +0200631 stream_release_buffers(si_strm(si));
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200632 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200633}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200634
Willy Tarreau5368d802012-08-21 18:22:06 +0200635/*
636 * This function is called to send buffer data to a stream socket.
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200637 * It calls the mux layer's snd_buf function. It relies on the
Godbach4f489902013-12-04 17:24:06 +0800638 * caller to commit polling changes. The caller should check conn->flags
639 * for errors.
Willy Tarreau5368d802012-08-21 18:22:06 +0200640 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +0200641int si_cs_send(struct conn_stream *cs)
Willy Tarreau5368d802012-08-21 18:22:06 +0200642{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200643 struct connection *conn = cs->conn;
644 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100645 struct channel *oc = si_oc(si);
Willy Tarreau5368d802012-08-21 18:22:06 +0200646 int ret;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200647 int did_send = 0;
648
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100649 if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
Olivier Houchardc31e2cb2019-06-24 16:08:08 +0200650 /* We're probably there because the tasklet was woken up,
651 * but process_stream() ran before, detected there were an
652 * error and put the si back to SI_ST_TAR. There's still
653 * CO_FL_ERROR on the connection but we don't want to add
654 * SI_FL_ERR back, so give up
655 */
656 if (si->state < SI_ST_CON)
657 return 0;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100658 si->flags |= SI_FL_ERR;
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200659 return 1;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100660 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200661
Christopher Faulet328ed222019-09-23 15:57:29 +0200662 /* We're already waiting to be able to send, give up */
663 if (si->wait_event.events & SUB_RETRY_SEND)
664 return 0;
665
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200666 /* we might have been called just after an asynchronous shutw */
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100667 if (conn->flags & CO_FL_SOCK_WR_SH || oc->flags & CF_SHUTW)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200668 return 1;
Willy Tarreau5368d802012-08-21 18:22:06 +0200669
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200670 if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) {
671 ret = conn->mux->snd_pipe(cs, oc->pipe);
Christopher Faulet86162db2019-07-05 11:49:11 +0200672 if (ret > 0)
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200673 did_send = 1;
Willy Tarreau5368d802012-08-21 18:22:06 +0200674
Willy Tarreauafc8a222014-11-28 15:46:27 +0100675 if (!oc->pipe->data) {
676 put_pipe(oc->pipe);
677 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200678 }
679
Christopher Faulet3f76f4c2018-11-20 10:21:08 +0100680 if (oc->pipe)
681 goto end;
Willy Tarreau5368d802012-08-21 18:22:06 +0200682 }
683
684 /* At this point, the pipe is empty, but we may still have data pending
685 * in the normal buffer.
686 */
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100687 if (co_data(oc)) {
688 /* when we're here, we already know that there is no spliced
689 * data left, and that there are sendable buffered data.
690 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200691
Willy Tarreau5368d802012-08-21 18:22:06 +0200692 /* check if we want to inform the kernel that we're interested in
693 * sending more data after this call. We want this if :
694 * - we're about to close after this last send and want to merge
695 * the ongoing FIN with the last segment.
696 * - we know we can't send everything at once and must get back
697 * here because of unaligned data
698 * - there is still a finite amount of data to forward
699 * The test is arranged so that the most common case does only 2
700 * tests.
701 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100702 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200703
Willy Tarreauafc8a222014-11-28 15:46:27 +0100704 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
705 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
Willy Tarreau4ac49282017-10-17 16:33:46 +0200706 (oc->flags & CF_EXPECT_MORE))) ||
Willy Tarreauecd2e152017-11-07 15:07:25 +0100707 ((oc->flags & CF_ISRESP) &&
708 ((oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW)) == (CF_AUTO_CLOSE|CF_SHUTW_NOW))))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100709 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200710
Willy Tarreauafc8a222014-11-28 15:46:27 +0100711 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100712 send_flag |= CO_SFL_STREAMER;
713
Olivier Houcharda254a372019-04-05 15:30:12 +0200714 if ((si->flags & SI_FL_L7_RETRY) && !b_data(&si->l7_buffer)) {
Olivier Houchardce1a0292019-05-17 15:38:29 +0200715 struct stream *s = si_strm(si);
Olivier Houcharda254a372019-04-05 15:30:12 +0200716 /* If we want to be able to do L7 retries, copy
717 * the data we're about to send, so that we are able
718 * to resend them if needed
719 */
720 /* Try to allocate a buffer if we had none.
721 * If it fails, the next test will just
722 * disable the l7 retries by setting
723 * l7_conn_retries to 0.
724 */
Olivier Houchardce1a0292019-05-17 15:38:29 +0200725 if (!s->txn || (s->txn->req.msg_state != HTTP_MSG_DONE))
Olivier Houcharda254a372019-04-05 15:30:12 +0200726 si->flags &= ~SI_FL_L7_RETRY;
727 else {
728 if (b_is_null(&si->l7_buffer))
729 b_alloc(&si->l7_buffer);
730 if (b_is_null(&si->l7_buffer))
731 si->flags &= ~SI_FL_L7_RETRY;
732 else {
733 memcpy(b_orig(&si->l7_buffer),
734 b_orig(&oc->buf),
735 b_size(&oc->buf));
736 si->l7_buffer.head = co_data(oc);
737 b_add(&si->l7_buffer, co_data(oc));
738 }
739
740 }
741 }
742
Olivier Houcharded0f2072018-08-16 15:41:52 +0200743 ret = cs->conn->mux->snd_buf(cs, &oc->buf, co_data(oc), send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800744 if (ret > 0) {
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200745 did_send = 1;
Willy Tarreau77e478c2018-06-19 07:03:14 +0200746 co_set_data(oc, co_data(oc) - ret);
Willy Tarreaudeccd112018-06-14 18:38:55 +0200747 c_realign_if_empty(oc);
748
749 if (!co_data(oc)) {
Godbache68e02d2013-10-11 15:48:29 +0800750 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100751 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800752 }
Godbache68e02d2013-10-11 15:48:29 +0800753 /* if some data remain in the buffer, it's only because the
754 * system buffers are full, we will try next time.
755 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200756 }
Godbache68e02d2013-10-11 15:48:29 +0800757 }
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100758
Willy Tarreauf6975aa2018-11-15 14:33:05 +0100759 end:
Christopher Faulet86162db2019-07-05 11:49:11 +0200760 if (did_send) {
761 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
762 if (si->state == SI_ST_CON)
763 si->state = SI_ST_RDY;
Christopher Faulet037b3eb2019-07-05 13:44:29 +0200764
765 si_rx_room_rdy(si_opposite(si));
Christopher Faulet86162db2019-07-05 11:49:11 +0200766 }
767
768 if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
769 si->flags |= SI_FL_ERR;
770 return 1;
771 }
772
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200773 /* 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 +0100774 if (!channel_is_empty(oc))
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100775 conn->mux->subscribe(cs, SUB_RETRY_SEND, &si->wait_event);
Olivier Houchardf6535282018-08-31 17:29:12 +0200776 return did_send;
Willy Tarreau5368d802012-08-21 18:22:06 +0200777}
778
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100779/* This is the ->process() function for any stream-interface's wait_event task.
780 * It's assigned during the stream-interface's initialization, for any type of
781 * stream interface. Thus it is always safe to perform a tasklet_wakeup() on a
782 * stream interface, as the presence of the CS is checked there.
783 */
Olivier Houchard91894cb2018-08-02 18:06:28 +0200784struct task *si_cs_io_cb(struct task *t, void *ctx, unsigned short state)
785{
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200786 struct stream_interface *si = ctx;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200787 struct conn_stream *cs = objt_cs(si->end);
Olivier Houchardf6535282018-08-31 17:29:12 +0200788 int ret = 0;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200789
790 if (!cs)
791 return NULL;
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100792
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100793 if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchardf6535282018-08-31 17:29:12 +0200794 ret = si_cs_send(cs);
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100795 if (!(si->wait_event.events & SUB_RETRY_RECV))
Olivier Houchardf6535282018-08-31 17:29:12 +0200796 ret |= si_cs_recv(cs);
797 if (ret != 0)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200798 si_cs_process(cs);
Olivier Houchardf6535282018-08-31 17:29:12 +0200799
Willy Tarreaua64c7032019-08-01 14:17:02 +0200800 stream_release_buffers(si_strm(si));
Olivier Houchard91894cb2018-08-02 18:06:28 +0200801 return (NULL);
802}
803
Willy Tarreau25f13102015-09-24 11:32:22 +0200804/* This function is designed to be called from within the stream handler to
Willy Tarreau236c4292019-06-06 08:19:20 +0200805 * update the input channel's expiration timer and the stream interface's
806 * Rx flags based on the channel's flags. It needs to be called only once
807 * after the channel's flags have settled down, and before they are cleared,
808 * though it doesn't harm to call it as often as desired (it just slightly
809 * hurts performance). It must not be called from outside of the stream
810 * handler, as what it does will be used to compute the stream task's
811 * expiration.
Willy Tarreau25f13102015-09-24 11:32:22 +0200812 */
Willy Tarreau236c4292019-06-06 08:19:20 +0200813void si_update_rx(struct stream_interface *si)
Willy Tarreau25f13102015-09-24 11:32:22 +0200814{
815 struct channel *ic = si_ic(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200816
Willy Tarreau236c4292019-06-06 08:19:20 +0200817 if (ic->flags & CF_SHUTR) {
818 si_rx_shut_blk(si);
819 return;
820 }
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100821
Willy Tarreau236c4292019-06-06 08:19:20 +0200822 /* Read not closed, update FD status and timeout for reads */
823 if (ic->flags & CF_DONT_READ)
824 si_rx_chan_blk(si);
825 else
826 si_rx_chan_rdy(si);
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100827
Willy Tarreau236c4292019-06-06 08:19:20 +0200828 if (!channel_is_empty(ic)) {
829 /* stop reading, imposed by channel's policy or contents */
830 si_rx_room_blk(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200831 }
Willy Tarreau236c4292019-06-06 08:19:20 +0200832 else {
833 /* (re)start reading and update timeout. Note: we don't recompute the timeout
834 * everytime we get here, otherwise it would risk never to expire. We only
835 * update it if is was not yet set. The stream socket handler will already
836 * have updated it if there has been a completed I/O.
837 */
838 si_rx_room_rdy(si);
839 }
840 if (si->flags & SI_FL_RXBLK_ANY & ~SI_FL_RX_WAIT_EP)
841 ic->rex = TICK_ETERNITY;
842 else if (!(ic->flags & CF_READ_NOEXP) && !tick_isset(ic->rex))
843 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreau25f13102015-09-24 11:32:22 +0200844
Willy Tarreau236c4292019-06-06 08:19:20 +0200845 si_chk_rcv(si);
846}
847
848/* This function is designed to be called from within the stream handler to
849 * update the output channel's expiration timer and the stream interface's
850 * Tx flags based on the channel's flags. It needs to be called only once
851 * after the channel's flags have settled down, and before they are cleared,
852 * though it doesn't harm to call it as often as desired (it just slightly
853 * hurts performance). It must not be called from outside of the stream
854 * handler, as what it does will be used to compute the stream task's
855 * expiration.
856 */
857void si_update_tx(struct stream_interface *si)
858{
859 struct channel *oc = si_oc(si);
860 struct channel *ic = si_ic(si);
861
862 if (oc->flags & CF_SHUTW)
863 return;
864
865 /* Write not closed, update FD status and timeout for writes */
866 if (channel_is_empty(oc)) {
867 /* stop writing */
868 if (!(si->flags & SI_FL_WAIT_DATA)) {
869 if ((oc->flags & CF_SHUTW_NOW) == 0)
870 si->flags |= SI_FL_WAIT_DATA;
871 oc->wex = TICK_ETERNITY;
Willy Tarreau25f13102015-09-24 11:32:22 +0200872 }
Willy Tarreau236c4292019-06-06 08:19:20 +0200873 return;
874 }
875
876 /* (re)start writing and update timeout. Note: we don't recompute the timeout
877 * everytime we get here, otherwise it would risk never to expire. We only
878 * update it if is was not yet set. The stream socket handler will already
879 * have updated it if there has been a completed I/O.
880 */
881 si->flags &= ~SI_FL_WAIT_DATA;
882 if (!tick_isset(oc->wex)) {
883 oc->wex = tick_add_ifset(now_ms, oc->wto);
884 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
885 /* Note: depending on the protocol, we don't know if we're waiting
886 * for incoming data or not. So in order to prevent the socket from
887 * expiring read timeouts during writes, we refresh the read timeout,
888 * except if it was already infinite or if we have explicitly setup
889 * independent streams.
Willy Tarreau25f13102015-09-24 11:32:22 +0200890 */
Willy Tarreau236c4292019-06-06 08:19:20 +0200891 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreau25f13102015-09-24 11:32:22 +0200892 }
893 }
894}
895
Willy Tarreau3b285d72019-06-06 08:20:17 +0200896/* perform a synchronous send() for the stream interface. The CF_WRITE_NULL and
897 * CF_WRITE_PARTIAL flags are cleared prior to the attempt, and will possibly
898 * be updated in case of success.
899 */
900void si_sync_send(struct stream_interface *si)
901{
902 struct channel *oc = si_oc(si);
903 struct conn_stream *cs;
904
905 oc->flags &= ~(CF_WRITE_NULL|CF_WRITE_PARTIAL);
906
907 if (oc->flags & CF_SHUTW)
908 return;
909
910 if (channel_is_empty(oc))
911 return;
912
913 if (!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST))
914 return;
915
916 cs = objt_cs(si->end);
917 if (!cs)
918 return;
919
Christopher Faulet037b3eb2019-07-05 13:44:29 +0200920 si_cs_send(cs);
Willy Tarreau3b285d72019-06-06 08:20:17 +0200921}
922
Willy Tarreaud14844a2018-11-08 18:15:29 +0100923/* Updates at once the channel flags, and timers of both stream interfaces of a
924 * same stream, to complete the work after the analysers, then updates the data
925 * layer below. This will ensure that any synchronous update performed at the
926 * data layer will be reflected in the channel flags and/or stream-interface.
Willy Tarreau829bd472019-06-06 09:17:23 +0200927 * Note that this does not change the stream interface's current state, though
928 * it updates the previous state to the current one.
Willy Tarreaud14844a2018-11-08 18:15:29 +0100929 */
930void si_update_both(struct stream_interface *si_f, struct stream_interface *si_b)
931{
932 struct channel *req = si_ic(si_f);
933 struct channel *res = si_oc(si_f);
Willy Tarreaud14844a2018-11-08 18:15:29 +0100934
935 req->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
936 res->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
937
Willy Tarreaud14844a2018-11-08 18:15:29 +0100938 si_f->prev_state = si_f->state;
939 si_b->prev_state = si_b->state;
940
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100941 /* let's recompute both sides states */
Willy Tarreau4f283fa2019-06-05 14:34:03 +0200942 if (si_state_in(si_f->state, SI_SB_RDY|SI_SB_EST))
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100943 si_update(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100944
Willy Tarreau4f283fa2019-06-05 14:34:03 +0200945 if (si_state_in(si_b->state, SI_SB_RDY|SI_SB_EST))
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100946 si_update(si_b);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100947
948 /* stream ints are processed outside of process_stream() and must be
949 * handled at the latest moment.
950 */
951 if (obj_type(si_f->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +0100952 ((si_rx_endp_ready(si_f) && !si_rx_blocked(si_f)) ||
953 (si_tx_endp_ready(si_f) && !si_tx_blocked(si_f))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100954 appctx_wakeup(si_appctx(si_f));
Willy Tarreaud14844a2018-11-08 18:15:29 +0100955
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100956 if (obj_type(si_b->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +0100957 ((si_rx_endp_ready(si_b) && !si_rx_blocked(si_b)) ||
958 (si_tx_endp_ready(si_b) && !si_tx_blocked(si_b))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100959 appctx_wakeup(si_appctx(si_b));
Willy Tarreaud14844a2018-11-08 18:15:29 +0100960}
961
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200962/*
963 * This function performs a shutdown-read on a stream interface attached to
964 * a connection in a connected or init state (it does nothing for other
965 * states). It either shuts the read side or marks itself as closed. The buffer
966 * flags are updated to reflect the new state. If the stream interface has
967 * SI_FL_NOHALF, we also forward the close to the write side. If a control
968 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +0200969 * descriptors are then shutdown or closed accordingly. The function
970 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200971 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200972static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200973{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200974 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100975 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200976
Willy Tarreauabb5d422018-11-14 16:58:52 +0100977 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100978 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200979 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100980 ic->flags |= CF_SHUTR;
981 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200982
Willy Tarreau4f283fa2019-06-05 14:34:03 +0200983 if (!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200984 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200985
Willy Tarreau51d0a7e2019-01-31 19:09:59 +0100986 if (si->flags & SI_FL_KILL_CONN)
987 cs->flags |= CS_FL_KILL_CONN;
988
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100989 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaua553ae92017-10-05 18:52:17 +0200990 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200991 si->state = SI_ST_DIS;
992 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200993 }
994 else if (si->flags & SI_FL_NOHALF) {
995 /* we want to immediately forward this close to the write side */
996 return stream_int_shutw_conn(si);
997 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200998}
999
1000/*
1001 * This function performs a shutdown-write on a stream interface attached to
1002 * a connection in a connected or init state (it does nothing for other
1003 * states). It either shuts the write side or marks itself as closed. The
1004 * buffer flags are updated to reflect the new state. It does also close
1005 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +01001006 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001007 */
Willy Tarreau6fe15412013-09-29 15:16:03 +02001008static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001009{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001010 struct conn_stream *cs = __objt_cs(si->end);
1011 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001012 struct channel *ic = si_ic(si);
1013 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001014
Willy Tarreauafc8a222014-11-28 15:46:27 +01001015 oc->flags &= ~CF_SHUTW_NOW;
1016 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +02001017 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001018 oc->flags |= CF_SHUTW;
1019 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001020 si_done_get(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001021
Hongbo Longe39683c2017-03-10 18:41:51 +01001022 if (tick_isset(si->hcto)) {
1023 ic->rto = si->hcto;
1024 ic->rex = tick_add(now_ms, ic->rto);
1025 }
1026
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001027 switch (si->state) {
Willy Tarreau4f283fa2019-06-05 14:34:03 +02001028 case SI_ST_RDY:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001029 case SI_ST_EST:
1030 /* we have to shut before closing, otherwise some short messages
1031 * may never leave the system, especially when there are remaining
1032 * unread data in the socket input buffer, or when nolinger is set.
1033 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1034 * no risk so we close both sides immediately.
1035 */
Willy Tarreau51d0a7e2019-01-31 19:09:59 +01001036 if (si->flags & SI_FL_KILL_CONN)
1037 cs->flags |= CS_FL_KILL_CONN;
1038
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001039 if (si->flags & SI_FL_ERR) {
1040 /* quick close, the socket is alredy shut anyway */
1041 }
1042 else if (si->flags & SI_FL_NOLINGER) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001043 /* unclean data-layer shutdown, typically an aborted request
1044 * or a forwarded shutdown from a client to a server due to
1045 * option abortonclose. No need for the TLS layer to try to
1046 * emit a shutdown message.
1047 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001048 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001049 }
1050 else {
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001051 /* clean data-layer shutdown. This only happens on the
1052 * frontend side, or on the backend side when forwarding
1053 * a client close in TCP mode or in HTTP TUNNEL mode
1054 * while option abortonclose is set. We want the TLS
1055 * layer to try to signal it to the peer before we close.
1056 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001057 cs_shutw(cs, CS_SHW_NORMAL);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001058
Willy Tarreaua553ae92017-10-05 18:52:17 +02001059 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
1060 /* OK just a shutw, but we want the caller
1061 * to disable polling on this FD if exists.
1062 */
1063 conn_cond_update_polling(conn);
1064 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001065 }
1066 }
1067
1068 /* fall through */
1069 case SI_ST_CON:
1070 /* we may have to close a pending connection, and mark the
1071 * response buffer as shutr
1072 */
Willy Tarreau51d0a7e2019-01-31 19:09:59 +01001073 if (si->flags & SI_FL_KILL_CONN)
1074 cs->flags |= CS_FL_KILL_CONN;
Willy Tarreaua553ae92017-10-05 18:52:17 +02001075 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001076 /* fall through */
1077 case SI_ST_CER:
1078 case SI_ST_QUE:
1079 case SI_ST_TAR:
1080 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +02001081 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001082 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +01001083 si->flags &= ~SI_FL_NOLINGER;
1084 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001085 ic->flags |= CF_SHUTR;
1086 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001087 si->exp = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +02001088 }
1089}
1090
Willy Tarreau46a8d922012-08-20 12:38:36 +02001091/* This function is used for inter-stream-interface calls. It is called by the
1092 * consumer to inform the producer side that it may be interested in checking
1093 * for free space in the buffer. Note that it intentionally does not update
1094 * timeouts, so that we can still check them later at wake-up. This function is
1095 * dedicated to connection-based stream interfaces.
1096 */
Willy Tarreauc5788912012-08-24 18:12:41 +02001097static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +02001098{
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001099 /* (re)start reading */
Willy Tarreau4f283fa2019-06-05 14:34:03 +02001100 if (si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001101 tasklet_wakeup(si->wait_event.tasklet);
Willy Tarreau46a8d922012-08-20 12:38:36 +02001102}
1103
1104
Willy Tarreaude5722c2012-08-20 15:01:10 +02001105/* This function is used for inter-stream-interface calls. It is called by the
1106 * producer to inform the consumer side that it may be interested in checking
1107 * for data in the buffer. Note that it intentionally does not update timeouts,
1108 * so that we can still check them later at wake-up.
1109 */
Willy Tarreauc5788912012-08-24 18:12:41 +02001110static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001111{
Willy Tarreauafc8a222014-11-28 15:46:27 +01001112 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001113 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001114
Willy Tarreau4f283fa2019-06-05 14:34:03 +02001115 if (unlikely(!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST) ||
Olivier Houchardb2fc04e2019-04-11 13:56:26 +02001116 (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +02001117 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001118
Willy Tarreauafc8a222014-11-28 15:46:27 +01001119 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001120 return;
1121
Willy Tarreauafc8a222014-11-28 15:46:27 +01001122 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +01001123 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001124 return;
1125
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001126 if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchard31f04e42018-10-22 16:01:09 +02001127 si_cs_send(cs);
Willy Tarreau33a09a52018-10-25 13:49:49 +02001128
Willy Tarreaubddf7fc2018-12-19 17:17:10 +01001129 if (cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING) || cs->conn->flags & CO_FL_ERROR) {
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001130 /* Write error on the file descriptor */
Olivier Houchardc31e2cb2019-06-24 16:08:08 +02001131 if (si->state >= SI_ST_CON)
1132 si->flags |= SI_FL_ERR;
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001133 goto out_wakeup;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001134 }
1135
1136 /* OK, so now we know that some data might have been sent, and that we may
1137 * have to poll first. We have to do that too if the buffer is not empty.
1138 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001139 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001140 /* the connection is established but we can't write. Either the
1141 * buffer is empty, or we just refrain from sending because the
1142 * ->o limit was reached. Maybe we just wrote the last
1143 * chunk and need to close.
1144 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001145 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001146 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreau4f283fa2019-06-05 14:34:03 +02001147 si_state_in(si->state, SI_SB_RDY|SI_SB_EST)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001148 si_shutw(si);
1149 goto out_wakeup;
1150 }
1151
Willy Tarreauafc8a222014-11-28 15:46:27 +01001152 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001153 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001154 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001155 }
1156 else {
1157 /* Otherwise there are remaining data to be sent in the buffer,
1158 * which means we have to poll before doing so.
1159 */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001160 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001161 if (!tick_isset(oc->wex))
1162 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001163 }
1164
Willy Tarreauafc8a222014-11-28 15:46:27 +01001165 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1166 struct channel *ic = si_ic(si);
1167
Willy Tarreaude5722c2012-08-20 15:01:10 +02001168 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001169 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1170 !channel_is_empty(oc))
1171 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001172
Willy Tarreauafc8a222014-11-28 15:46:27 +01001173 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001174 /* Note: to prevent the client from expiring read timeouts
1175 * during writes, we refresh it. We only do this if the
1176 * interface is not configured for "independent streams",
1177 * because for some applications it's better not to do this,
1178 * for instance when continuously exchanging small amounts
1179 * of data which can full the socket buffers long before a
1180 * write timeout is detected.
1181 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001182 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001183 }
1184 }
1185
1186 /* in case of special condition (error, shutdown, end of write...), we
1187 * have to notify the task.
1188 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001189 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1190 ((oc->flags & CF_WAKE_WRITE) &&
1191 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreau7ab22adb2019-06-05 14:53:22 +02001192 !si_state_in(si->state, SI_SB_EST))))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001193 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001194 if (!(si->flags & SI_FL_DONT_WAKE))
1195 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001196 }
1197}
1198
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001199/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001200 * This is the callback which is called by the connection layer to receive data
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001201 * into the buffer from the connection. It iterates over the mux layer's
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001202 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001203 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +02001204int si_cs_recv(struct conn_stream *cs)
Willy Tarreauce323de2012-08-20 21:41:06 +02001205{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001206 struct connection *conn = cs->conn;
1207 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001208 struct channel *ic = si_ic(si);
Olivier Houchardf6535282018-08-31 17:29:12 +02001209 int ret, max, cur_read = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001210 int read_poll = MAX_READ_POLL_LOOPS;
Christopher Fauletc6618d62018-10-11 15:56:04 +02001211 int flags = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001212
Olivier Houchardf6535282018-08-31 17:29:12 +02001213 /* If another call to si_cs_recv() failed, and we subscribed to
1214 * recv events already, give up now.
1215 */
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001216 if (si->wait_event.events & SUB_RETRY_RECV)
Olivier Houchardf6535282018-08-31 17:29:12 +02001217 return 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001218
Willy Tarreauce323de2012-08-20 21:41:06 +02001219 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001220 if (ic->flags & CF_SHUTR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001221 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001222
Willy Tarreau54e917c2017-08-30 07:35:35 +02001223 /* stop here if we reached the end of data */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001224 if (cs->flags & CS_FL_EOS)
Willy Tarreau54e917c2017-08-30 07:35:35 +02001225 goto out_shutdown_r;
1226
Christopher Fauletf061e422018-12-07 14:51:20 +01001227 /* stop immediately on errors. Note that we DON'T want to stop on
1228 * POLL_ERR, as the poller might report a write error while there
1229 * are still data available in the recv buffer. This typically
1230 * happens when we send too large a request to a backend server
1231 * which rejects it before reading it all.
1232 */
1233 if (!(cs->flags & CS_FL_RCV_MORE)) {
1234 if (!conn_xprt_ready(conn))
1235 return 0;
1236 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
1237 return 1; // We want to make sure si_cs_wake() is called, so that process_strema is woken up, on failure
1238 }
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001239
Willy Tarreau7ab99a32018-12-18 09:15:43 +01001240 /* prepare to detect if the mux needs more room */
1241 cs->flags &= ~CS_FL_WANT_ROOM;
1242
Willy Tarreau77e478c2018-06-19 07:03:14 +02001243 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !co_data(ic) &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001244 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001245 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001246 /* The buffer was empty and nothing was transferred for more
1247 * than one second. This was caused by a pause and not by
1248 * congestion. Reset any streaming mode to reduce latency.
1249 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001250 ic->xfer_small = 0;
1251 ic->xfer_large = 0;
1252 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001253 }
1254
Willy Tarreau96199b12012-08-24 00:46:52 +02001255 /* First, let's see if we may splice data across the channel without
1256 * using a buffer.
1257 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001258 if (conn->xprt->rcv_pipe && conn->mux->rcv_pipe &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001259 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1260 ic->flags & CF_KERN_SPLICING) {
Willy Tarreaud760eec2018-07-10 09:50:25 +02001261 if (c_data(ic)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001262 /* We're embarrassed, there are already data pending in
1263 * the buffer and we don't want to have them at two
1264 * locations at a time. Let's indicate we need some
1265 * place and ask the consumer to hurry.
1266 */
Christopher Fauletc6618d62018-10-11 15:56:04 +02001267 flags |= CO_RFL_BUF_FLUSH;
Willy Tarreau96199b12012-08-24 00:46:52 +02001268 goto abort_splice;
1269 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001270
Willy Tarreauafc8a222014-11-28 15:46:27 +01001271 if (unlikely(ic->pipe == NULL)) {
1272 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1273 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001274 goto abort_splice;
1275 }
1276 }
1277
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001278 ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001279 if (ret < 0) {
1280 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001281 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001282 goto abort_splice;
1283 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001284
Willy Tarreau96199b12012-08-24 00:46:52 +02001285 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001286 if (ic->to_forward != CHN_INFINITE_FORWARD)
1287 ic->to_forward -= ret;
1288 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001289 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001290 ic->flags |= CF_READ_PARTIAL;
Willy Tarreaub27f54a2019-06-05 16:43:44 +02001291 if (si->state == SI_ST_CON)
1292 si->state = SI_ST_RDY;
Willy Tarreauce323de2012-08-20 21:41:06 +02001293 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001294
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001295 if (cs->flags & CS_FL_EOS)
Willy Tarreau96199b12012-08-24 00:46:52 +02001296 goto out_shutdown_r;
1297
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001298 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001299 return 1;
Willy Tarreau96199b12012-08-24 00:46:52 +02001300
Willy Tarreau61d39a02013-07-18 21:49:32 +02001301 if (conn->flags & CO_FL_WAIT_ROOM) {
1302 /* the pipe is full or we have read enough data that it
1303 * could soon be full. Let's stop before needing to poll.
1304 */
Willy Tarreaudb398432018-11-15 11:08:52 +01001305 si_rx_room_blk(si);
Willy Tarreauffb12052018-11-15 16:06:02 +01001306 goto done_recv;
Willy Tarreau61d39a02013-07-18 21:49:32 +02001307 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001308
Willy Tarreauce323de2012-08-20 21:41:06 +02001309 /* splice not possible (anymore), let's go on on standard copy */
1310 }
Willy Tarreau81464b42018-11-15 15:52:53 +01001311 else {
1312 /* be sure not to block regular receive path below */
1313 conn->flags &= ~CO_FL_WAIT_ROOM;
1314 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001315
1316 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001317 if (ic->pipe && unlikely(!ic->pipe->data)) {
1318 put_pipe(ic->pipe);
1319 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001320 }
1321
Christopher Fauleta73e59b2016-12-09 17:30:18 +01001322 /* now we'll need a input buffer for the stream */
Willy Tarreau581abd32018-10-25 10:21:41 +02001323 if (!si_alloc_ibuf(si, &(si_strm(si)->buffer_wait)))
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001324 goto end_recv;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001325
Willy Tarreau61d39a02013-07-18 21:49:32 +02001326 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1327 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1328 * that if such an event is not handled above in splice, it will be handled here by
1329 * recv().
1330 */
Olivier Houchardc490efd2018-12-04 15:46:16 +01001331 while ((cs->flags & CS_FL_RCV_MORE) ||
1332 (!(conn->flags & (CO_FL_ERROR | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE)) &&
1333 (!(cs->flags & (CS_FL_ERROR|CS_FL_EOS))) && !(ic->flags & CF_SHUTR))) {
Christopher Faulet4eb7d742018-10-11 15:29:21 +02001334 /* <max> may be null. This is the mux responsibility to set
1335 * CS_FL_RCV_MORE on the CS if more space is needed.
1336 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001337 max = channel_recv_max(ic);
Christopher Faulet9cdd5032019-05-14 22:46:41 +02001338 ret = cs->conn->mux->rcv_buf(cs, &ic->buf, max, flags | (co_data(ic) ? CO_RFL_BUF_WET : 0));
Willy Tarreau674e0ad2018-12-05 13:45:41 +01001339
Olivier Houchardd247be02018-12-06 16:22:29 +01001340 if (cs->flags & CS_FL_WANT_ROOM)
Willy Tarreaudb398432018-11-15 11:08:52 +01001341 si_rx_room_blk(si);
Willy Tarreau6577b482017-12-10 21:19:33 +01001342
Christopher Fauleteffc3752018-10-31 08:53:54 +01001343 if (cs->flags & CS_FL_READ_PARTIAL) {
1344 if (tick_isset(ic->rex))
1345 ic->rex = tick_add_ifset(now_ms, ic->rto);
1346 cs->flags &= ~CS_FL_READ_PARTIAL;
1347 }
1348
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001349 if (ret <= 0) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001350 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001351 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001352
Olivier Houcharda254a372019-04-05 15:30:12 +02001353 if (si->flags & SI_FL_L7_RETRY) {
1354 struct htx *htx;
1355 struct htx_sl *sl;
1356
1357 htx = htxbuf(&ic->buf);
1358 if (htx) {
Christopher Faulet297fbb42019-05-13 14:41:27 +02001359 sl = http_get_stline(htx);
Olivier Houcharda254a372019-04-05 15:30:12 +02001360 if (sl && l7_status_match(si_strm(si)->be,
1361 sl->info.res.status)) {
1362 /* If we got a status for which we would
1363 * like to retry the request, empty
1364 * the buffer and pretend there's an
1365 * error on the channel.
1366 */
1367 ic->flags |= CF_READ_ERROR;
1368 htx_reset(htx);
1369 return 1;
1370 }
1371 }
1372 si->flags &= ~SI_FL_L7_RETRY;
1373 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001374 cur_read += ret;
1375
1376 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001377 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001378 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001379 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1380 if (fwd > ic->to_forward)
1381 fwd = ic->to_forward;
1382 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001383 }
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001384 c_adv(ic, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001385 }
1386
Willy Tarreauafc8a222014-11-28 15:46:27 +01001387 ic->flags |= CF_READ_PARTIAL;
1388 ic->total += ret;
Willy Tarreaub27f54a2019-06-05 16:43:44 +02001389 if (si->state == SI_ST_CON)
1390 si->state = SI_ST_RDY;
Willy Tarreauce323de2012-08-20 21:41:06 +02001391
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001392 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
1393 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001394 si_rx_chan_blk(si);
Willy Tarreau62dd6982017-11-18 11:26:20 +01001395 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001396 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001397
1398 /* if too many bytes were missing from last read, it means that
1399 * it's pointless trying to read again because the system does
1400 * not have them in buffers.
1401 */
1402 if (ret < max) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001403 /* if a streamer has read few data, it may be because we
1404 * have exhausted system buffers. It's not worth trying
1405 * again.
1406 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001407 if (ic->flags & CF_STREAMER) {
1408 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001409 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001410 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001411 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001412
1413 /* if we read a large block smaller than what we requested,
1414 * it's almost certain we'll never get anything more.
1415 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001416 if (ret >= global.tune.recv_enough) {
1417 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001418 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001419 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001420 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001421 }
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001422
1423 /* if we are waiting for more space, don't try to read more data
1424 * right now.
1425 */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001426 if (si_rx_blocked(si))
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001427 break;
Willy Tarreauce323de2012-08-20 21:41:06 +02001428 } /* while !flags */
1429
Willy Tarreauffb12052018-11-15 16:06:02 +01001430 done_recv:
Willy Tarreauc5890e62014-02-09 17:47:01 +01001431 if (cur_read) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001432 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001433 (cur_read <= ic->buf.size / 2)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001434 ic->xfer_large = 0;
1435 ic->xfer_small++;
1436 if (ic->xfer_small >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001437 /* we have read less than half of the buffer in
1438 * one pass, and this happened at least 3 times.
1439 * This is definitely not a streamer.
1440 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001441 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001442 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001443 else if (ic->xfer_small >= 2) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001444 /* if the buffer has been at least half full twice,
1445 * we receive faster than we send, so at least it
1446 * is not a "fast streamer".
1447 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001448 ic->flags &= ~CF_STREAMER_FAST;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001449 }
1450 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001451 else if (!(ic->flags & CF_STREAMER_FAST) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001452 (cur_read >= ic->buf.size - global.tune.maxrewrite)) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001453 /* we read a full buffer at once */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001454 ic->xfer_small = 0;
1455 ic->xfer_large++;
1456 if (ic->xfer_large >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001457 /* we call this buffer a fast streamer if it manages
1458 * to be filled in one call 3 consecutive times.
1459 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001460 ic->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001461 }
1462 }
1463 else {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001464 ic->xfer_small = 0;
1465 ic->xfer_large = 0;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001466 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001467 ic->last_read = now_ms;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001468 }
1469
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001470 end_recv:
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001471 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001472 return 1;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001473
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001474 if (cs->flags & CS_FL_EOS)
Willy Tarreauce323de2012-08-20 21:41:06 +02001475 /* connection closed */
1476 goto out_shutdown_r;
1477
Willy Tarreau32742fd2018-11-14 14:07:59 +01001478 /* Subscribe to receive events if we're blocking on I/O */
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001479 if (!si_rx_blocked(si)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001480 conn->mux->subscribe(cs, SUB_RETRY_RECV, &si->wait_event);
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001481 si_rx_endp_done(si);
1482 } else {
1483 si_rx_endp_more(si);
1484 }
Olivier Houchardf6535282018-08-31 17:29:12 +02001485
Olivier Houchard19a2e2d2019-06-07 18:10:52 +02001486 return (cur_read != 0) || si_rx_blocked(si) || (cs->flags & CS_FL_EOI);
Willy Tarreauce323de2012-08-20 21:41:06 +02001487
1488 out_shutdown_r:
Olivier Houchardfd0c2dc2018-12-13 15:38:16 +01001489 if (conn->flags & CO_FL_CONNECTED) {
1490 /* we received a shutdown */
1491 ic->flags |= CF_READ_NULL;
1492 if (ic->flags & CF_AUTO_CLOSE)
1493 channel_shutw_now(ic);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +01001494 stream_int_read0(si);
Olivier Houchardfd0c2dc2018-12-13 15:38:16 +01001495 }
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001496 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001497}
1498
1499/*
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001500 * This function propagates a null read received on a socket-based connection.
1501 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001502 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001503 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +01001504static void stream_int_read0(struct stream_interface *si)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001505{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001506 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001507 struct channel *ic = si_ic(si);
1508 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001509
Willy Tarreauabb5d422018-11-14 16:58:52 +01001510 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001511 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001512 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001513 ic->flags |= CF_SHUTR;
1514 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001515
Willy Tarreau4f283fa2019-06-05 14:34:03 +02001516 if (!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST))
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001517 return;
1518
Willy Tarreauafc8a222014-11-28 15:46:27 +01001519 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001520 goto do_close;
1521
1522 if (si->flags & SI_FL_NOHALF) {
1523 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001524 /* force flag on ssl to keep stream in cache */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001525 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001526 goto do_close;
1527 }
1528
1529 /* otherwise that's just a normal read shutdown */
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001530 return;
1531
1532 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001533 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaua553ae92017-10-05 18:52:17 +02001534 cs_close(cs);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001535
Willy Tarreauafc8a222014-11-28 15:46:27 +01001536 oc->flags &= ~CF_SHUTW_NOW;
1537 oc->flags |= CF_SHUTW;
1538 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001539
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001540 si_done_get(si);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001541
Olivier Houchardaacc4052019-05-21 17:43:50 +02001542 /* Don't change the state to SI_ST_DIS yet if we're still
1543 * in SI_ST_CON, otherwise it means sess_establish() hasn't
Willy Tarreaub27f54a2019-06-05 16:43:44 +02001544 * been called yet, and so the analysers would not run. However
1545 * it's fine to switch to SI_ST_RDY as we have really validated
1546 * the connection.
Olivier Houchardaacc4052019-05-21 17:43:50 +02001547 */
1548 if (si->state == SI_ST_EST)
1549 si->state = SI_ST_DIS;
Willy Tarreaub27f54a2019-06-05 16:43:44 +02001550 else if (si->state == SI_ST_CON)
1551 si->state = SI_ST_RDY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001552 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001553 return;
1554}
1555
Willy Tarreau651e1822015-09-23 20:06:13 +02001556/* Callback to be used by applet handlers upon completion. It updates the stream
1557 * (which may or may not take this opportunity to try to forward data), then
Emeric Brun2802b072017-06-30 14:11:56 +02001558 * may re-enable the applet's based on the channels and stream interface's final
Willy Tarreau651e1822015-09-23 20:06:13 +02001559 * states.
1560 */
Willy Tarreauaa977ba2015-09-25 11:45:06 +02001561void si_applet_wake_cb(struct stream_interface *si)
Willy Tarreaue5f86492015-04-19 15:16:35 +02001562{
Willy Tarreaueca572f2015-09-25 19:11:55 +02001563 struct channel *ic = si_ic(si);
1564
1565 /* If the applet wants to write and the channel is closed, it's a
1566 * broken pipe and it must be reported.
1567 */
Willy Tarreau05b9b642018-11-14 13:43:35 +01001568 if (!(si->flags & SI_FL_RX_WAIT_EP) && (ic->flags & CF_SHUTR))
Willy Tarreaueca572f2015-09-25 19:11:55 +02001569 si->flags |= SI_FL_ERR;
1570
Willy Tarreau186dcdd2018-11-16 16:18:34 +01001571 /* automatically mark the applet having data available if it reported
1572 * begin blocked by the channel.
1573 */
1574 if (si_rx_blocked(si))
1575 si_rx_endp_more(si);
1576
Willy Tarreau651e1822015-09-23 20:06:13 +02001577 /* update the stream-int, channels, and possibly wake the stream up */
1578 stream_int_notify(si);
Willy Tarreaua64c7032019-08-01 14:17:02 +02001579 stream_release_buffers(si_strm(si));
Willy Tarreaue5f86492015-04-19 15:16:35 +02001580
Willy Tarreau32742fd2018-11-14 14:07:59 +01001581 /* stream_int_notify may have passed through chk_snd and released some
1582 * RXBLK flags. Process_stream will consider those flags to wake up the
1583 * appctx but in the case the task is not in runqueue we may have to
1584 * wakeup the appctx immediately.
Emeric Brun2802b072017-06-30 14:11:56 +02001585 */
Olivier Houchard51205a12019-04-17 19:29:35 +02001586 if ((si_rx_endp_ready(si) && !si_rx_blocked(si)) ||
1587 (si_tx_endp_ready(si) && !si_tx_blocked(si)))
Willy Tarreau563cc372015-04-19 18:13:56 +02001588 appctx_wakeup(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001589}
1590
1591/*
1592 * This function performs a shutdown-read on a stream interface attached to an
1593 * applet in a connected or init state (it does nothing for other states). It
1594 * either shuts the read side or marks itself as closed. The buffer flags are
1595 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1596 * we also forward the close to the write side. The owner task is woken up if
1597 * it exists.
1598 */
1599static void stream_int_shutr_applet(struct stream_interface *si)
1600{
1601 struct channel *ic = si_ic(si);
1602
Willy Tarreauabb5d422018-11-14 16:58:52 +01001603 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001604 if (ic->flags & CF_SHUTR)
1605 return;
1606 ic->flags |= CF_SHUTR;
1607 ic->rex = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001608
Willy Tarreau828824a2015-04-19 17:20:03 +02001609 /* Note: on shutr, we don't call the applet */
1610
Willy Tarreau4f283fa2019-06-05 14:34:03 +02001611 if (!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001612 return;
1613
1614 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau958f0742015-09-25 20:24:26 +02001615 si_applet_release(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001616 si->state = SI_ST_DIS;
1617 si->exp = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001618 }
1619 else if (si->flags & SI_FL_NOHALF) {
1620 /* we want to immediately forward this close to the write side */
1621 return stream_int_shutw_applet(si);
1622 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001623}
1624
1625/*
1626 * This function performs a shutdown-write on a stream interface attached to an
1627 * applet in a connected or init state (it does nothing for other states). It
1628 * either shuts the write side or marks itself as closed. The buffer flags are
1629 * updated to reflect the new state. It does also close everything if the SI
1630 * was marked as being in error state. The owner task is woken up if it exists.
1631 */
1632static void stream_int_shutw_applet(struct stream_interface *si)
1633{
1634 struct channel *ic = si_ic(si);
1635 struct channel *oc = si_oc(si);
1636
1637 oc->flags &= ~CF_SHUTW_NOW;
1638 if (oc->flags & CF_SHUTW)
1639 return;
1640 oc->flags |= CF_SHUTW;
1641 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001642 si_done_get(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001643
Hongbo Longe39683c2017-03-10 18:41:51 +01001644 if (tick_isset(si->hcto)) {
1645 ic->rto = si->hcto;
1646 ic->rex = tick_add(now_ms, ic->rto);
1647 }
1648
Willy Tarreau828824a2015-04-19 17:20:03 +02001649 /* on shutw we always wake the applet up */
1650 appctx_wakeup(si_appctx(si));
1651
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001652 switch (si->state) {
Willy Tarreau4f283fa2019-06-05 14:34:03 +02001653 case SI_ST_RDY:
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001654 case SI_ST_EST:
1655 /* we have to shut before closing, otherwise some short messages
1656 * may never leave the system, especially when there are remaining
1657 * unread data in the socket input buffer, or when nolinger is set.
1658 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1659 * no risk so we close both sides immediately.
1660 */
1661 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1662 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1663 return;
1664
1665 /* fall through */
1666 case SI_ST_CON:
1667 case SI_ST_CER:
1668 case SI_ST_QUE:
1669 case SI_ST_TAR:
1670 /* Note that none of these states may happen with applets */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001671 si_applet_release(si);
Willy Tarreau958f0742015-09-25 20:24:26 +02001672 si->state = SI_ST_DIS;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001673 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +01001674 si->flags &= ~SI_FL_NOLINGER;
1675 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001676 ic->flags |= CF_SHUTR;
1677 ic->rex = TICK_ETERNITY;
1678 si->exp = TICK_ETERNITY;
1679 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001680}
1681
1682/* chk_rcv function for applets */
1683static void stream_int_chk_rcv_applet(struct stream_interface *si)
1684{
1685 struct channel *ic = si_ic(si);
1686
1687 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1688 __FUNCTION__,
1689 si, si->state, ic->flags, si_oc(si)->flags);
1690
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001691 if (!ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001692 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001693 appctx_wakeup(si_appctx(si));
Thierry FOURNIER5bc2cbf2015-09-04 18:40:36 +02001694 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001695}
1696
1697/* chk_snd function for applets */
1698static void stream_int_chk_snd_applet(struct stream_interface *si)
1699{
1700 struct channel *oc = si_oc(si);
1701
1702 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1703 __FUNCTION__,
1704 si, si->state, si_ic(si)->flags, oc->flags);
1705
1706 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1707 return;
1708
Willy Tarreau828824a2015-04-19 17:20:03 +02001709 /* we only wake the applet up if it was waiting for some data */
1710
1711 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001712 return;
1713
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001714 if (!tick_isset(oc->wex))
1715 oc->wex = tick_add_ifset(now_ms, oc->wto);
1716
Willy Tarreau828824a2015-04-19 17:20:03 +02001717 if (!channel_is_empty(oc)) {
1718 /* (re)start sending */
1719 appctx_wakeup(si_appctx(si));
1720 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001721}
1722
Willy Tarreaudded32d2008-11-30 19:48:07 +01001723/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001724 * Local variables:
1725 * c-indent-level: 8
1726 * c-basic-offset: 8
1727 * End:
1728 */