blob: fd5311d837299cba56b60f77ec6830c19c711713 [file] [log] [blame]
Willy Tarreaucff64112008-11-03 06:26:53 +01001/*
2 * Functions managing stream_interface structures
3 *
Willy Tarreauf873d752012-05-11 17:47:17 +02004 * Copyright 2000-2012 Willy Tarreau <w@1wt.eu>
Willy Tarreaucff64112008-11-03 06:26:53 +01005 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13#include <errno.h>
14#include <fcntl.h>
15#include <stdio.h>
16#include <stdlib.h>
17
18#include <sys/socket.h>
19#include <sys/stat.h>
20#include <sys/types.h>
21
Willy Tarreaubf883e02014-11-25 21:10:35 +010022#include <common/buffer.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010023#include <common/compat.h>
24#include <common/config.h>
25#include <common/debug.h>
26#include <common/standard.h>
27#include <common/ticks.h>
28#include <common/time.h>
29
Willy Tarreau8a8d83b2015-04-13 13:24:54 +020030#include <proto/applet.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020031#include <proto/channel.h>
Willy Tarreau8b117082012-08-06 15:06:49 +020032#include <proto/connection.h>
Olivier 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
178 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
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) {
220 case SI_ST_EST:
Willy Tarreau4a36b562012-08-06 19:31:45 +0200221 /* we have to shut before closing, otherwise some short messages
222 * may never leave the system, especially when there are remaining
223 * unread data in the socket input buffer, or when nolinger is set.
224 * However, if SI_FL_NOLINGER is explicitly set, we know there is
225 * no risk so we close both sides immediately.
226 */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200227 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
Willy Tarreauafc8a222014-11-28 15:46:27 +0100228 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200229 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200230
231 /* fall through */
232 case SI_ST_CON:
233 case SI_ST_CER:
Willy Tarreau32d3ee92010-12-29 14:03:02 +0100234 case SI_ST_QUE:
235 case SI_ST_TAR:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200236 /* Note that none of these states may happen with applets */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200237 si->state = SI_ST_DIS;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200238 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +0100239 si->flags &= ~SI_FL_NOLINGER;
240 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100241 ic->flags |= CF_SHUTR;
242 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200243 si->exp = TICK_ETERNITY;
244 }
245
Willy Tarreau4a36b562012-08-06 19:31:45 +0200246 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100247 if (!(si->flags & SI_FL_DONT_WAKE))
248 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200249}
250
251/* default chk_rcv function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200252static void stream_int_chk_rcv(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200253{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100254 struct channel *ic = si_ic(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200255
Willy Tarreauafc8a222014-11-28 15:46:27 +0100256 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200257 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100258 si, si->state, ic->flags, si_oc(si)->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200259
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200260 if (ic->pipe) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200261 /* stop reading */
Willy Tarreaudb398432018-11-15 11:08:52 +0100262 si_rx_room_blk(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200263 }
264 else {
265 /* (re)start reading */
Olivier Houchard53216e72018-10-10 15:46:36 +0200266 tasklet_wakeup(si->wait_event.task);
Willy Tarreau07373b82014-11-28 12:08:47 +0100267 if (!(si->flags & SI_FL_DONT_WAKE))
268 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200269 }
270}
271
272/* default chk_snd function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200273static void stream_int_chk_snd(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200274{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100275 struct channel *oc = si_oc(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200276
Willy Tarreauafc8a222014-11-28 15:46:27 +0100277 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200278 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100279 si, si->state, si_ic(si)->flags, oc->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200280
Willy Tarreauafc8a222014-11-28 15:46:27 +0100281 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200282 return;
283
284 if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100285 channel_is_empty(oc)) /* called with nothing to send ! */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200286 return;
287
288 /* Otherwise there are remaining data to be sent in the buffer,
289 * so we tell the handler.
290 */
291 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100292 if (!tick_isset(oc->wex))
293 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200294
Willy Tarreau07373b82014-11-28 12:08:47 +0100295 if (!(si->flags & SI_FL_DONT_WAKE))
296 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200297}
298
Willy Tarreaua9ff5e62015-07-19 18:46:30 +0200299/* Register an applet to handle a stream_interface as a new appctx. The SI will
300 * wake it up everytime it is solicited. The appctx must be deleted by the task
301 * handler using si_release_endpoint(), possibly from within the function itself.
302 * It also pre-initializes the applet's context and returns it (or NULL in case
303 * it could not be allocated).
Willy Tarreaufb90d942009-09-05 20:57:35 +0200304 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100305struct appctx *si_register_handler(struct stream_interface *si, struct applet *app)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200306{
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100307 struct appctx *appctx;
308
Willy Tarreau07373b82014-11-28 12:08:47 +0100309 DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si_task(si));
Willy Tarreaufb90d942009-09-05 20:57:35 +0200310
Willy Tarreaua7513f52015-04-05 00:15:26 +0200311 appctx = si_alloc_appctx(si, app);
Willy Tarreaua69fc9f2014-12-22 19:34:00 +0100312 if (!appctx)
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100313 return NULL;
314
Willy Tarreau0cd3bd62018-11-06 18:46:37 +0100315 si_cant_get(si);
Willy Tarreau828824a2015-04-19 17:20:03 +0200316 appctx_wakeup(appctx);
Willy Tarreau1fbe1c92013-12-01 09:35:41 +0100317 return si_appctx(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200318}
319
Willy Tarreau2c6be842012-07-06 17:12:34 +0200320/* This callback is used to send a valid PROXY protocol line to a socket being
Willy Tarreauafad0e02012-08-09 14:45:22 +0200321 * established. It returns 0 if it fails in a fatal way or needs to poll to go
322 * further, otherwise it returns non-zero and removes itself from the connection's
Willy Tarreaua1a74742012-08-24 12:14:49 +0200323 * flags (the bit is provided in <flag> by the caller). It is designed to be
324 * called by the connection handler and relies on it to commit polling changes.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200325 * Note that it can emit a PROXY line by relying on the other end's address
326 * when the connection is attached to a stream interface, or by resolving the
327 * local address otherwise (also called a LOCAL line).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200328 */
329int conn_si_send_proxy(struct connection *conn, unsigned int flag)
330{
Willy Tarreau2c6be842012-07-06 17:12:34 +0200331 /* we might have been called just after an asynchronous shutw */
Willy Tarreaua1a74742012-08-24 12:14:49 +0200332 if (conn->flags & CO_FL_SOCK_WR_SH)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200333 goto out_error;
334
Willy Tarreaud02cdd22013-12-15 10:23:20 +0100335 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200336 goto out_error;
337
Willy Tarreau2c6be842012-07-06 17:12:34 +0200338 /* If we have a PROXY line to send, we'll use this to validate the
339 * connection, in which case the connection is validated only once
340 * we've sent the whole proxy line. Otherwise we use connect().
341 */
Tim Duesterhus36839dc2019-02-26 17:09:51 +0100342 if (conn->send_proxy_ofs) {
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100343 const struct conn_stream *cs;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200344 int ret;
345
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100346 cs = cs_get_first(conn);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200347 /* The target server expects a PROXY line to be sent first.
348 * If the send_proxy_ofs is negative, it corresponds to the
349 * offset to start sending from then end of the proxy string
350 * (which is recomputed every time since it's constant). If
351 * it is positive, it means we have to send from the start.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200352 * We can only send a "normal" PROXY line when the connection
353 * is attached to a stream interface. Otherwise we can only
354 * send a LOCAL line (eg: for use with health checks).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200355 */
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100356
357 if (cs && cs->data_cb == &si_conn_cb) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200358 struct stream_interface *si = cs->data;
359 struct conn_stream *remote_cs = objt_cs(si_opposite(si)->end);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200360 ret = make_proxy_line(trash.area, trash.size,
361 objt_server(conn->target),
362 remote_cs ? remote_cs->conn : NULL);
Olivier Houchard661167d2019-05-29 17:08:03 +0200363 /* We may not have a conn_stream yet, if we don't
364 * know which mux to use, because it will be decided
365 * during the SSL handshake. In this case, there should
366 * be a session associated to the connection in
367 * conn->owner, and we know it is the session that
368 * initiated that connection, so we can just use
369 * its origin, which should contain the client
370 * connection.
371 */
372 } else if (!cs && conn->owner) {
373 struct session *sess = conn->owner;
374
375 ret = make_proxy_line(trash.area, trash.size,
376 objt_server(conn->target),
377 objt_conn(sess->origin));
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200378 }
379 else {
380 /* The target server expects a LOCAL line to be sent first. Retrieving
381 * local or remote addresses may fail until the connection is established.
382 */
383 conn_get_from_addr(conn);
384 if (!(conn->flags & CO_FL_ADDR_FROM_SET))
385 goto out_wait;
386
387 conn_get_to_addr(conn);
388 if (!(conn->flags & CO_FL_ADDR_TO_SET))
389 goto out_wait;
390
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200391 ret = make_proxy_line(trash.area, trash.size,
392 objt_server(conn->target), conn);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200393 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200394
Willy Tarreau2c6be842012-07-06 17:12:34 +0200395 if (!ret)
396 goto out_error;
397
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200398 if (conn->send_proxy_ofs > 0)
399 conn->send_proxy_ofs = -ret; /* first call */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200400
Willy Tarreaua1a74742012-08-24 12:14:49 +0200401 /* we have to send trash from (ret+sp for -sp bytes). If the
402 * data layer has a pending write, we'll also set MSG_MORE.
403 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200404 ret = conn_sock_send(conn,
405 trash.area + ret + conn->send_proxy_ofs,
406 -conn->send_proxy_ofs,
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200407 (conn->flags & CO_FL_XPRT_WR_ENA) ? MSG_MORE : 0);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200408
Willy Tarreau0a03c0f2015-03-13 00:05:28 +0100409 if (ret < 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200410 goto out_error;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200411
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200412 conn->send_proxy_ofs += ret; /* becomes zero once complete */
413 if (conn->send_proxy_ofs != 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200414 goto out_wait;
415
416 /* OK we've sent the whole line, we're connected */
417 }
418
Willy Tarreaua1a74742012-08-24 12:14:49 +0200419 /* The connection is ready now, simply return and let the connection
420 * handler notify upper layers if needed.
Willy Tarreau2c6be842012-07-06 17:12:34 +0200421 */
422 if (conn->flags & CO_FL_WAIT_L4_CONN)
423 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200424 conn->flags &= ~flag;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200425 return 1;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200426
427 out_error:
Willy Tarreauafad0e02012-08-09 14:45:22 +0200428 /* Write error on the file descriptor */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200429 conn->flags |= CO_FL_ERROR;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200430 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200431
432 out_wait:
Willy Tarreaua1a74742012-08-24 12:14:49 +0200433 __conn_sock_stop_recv(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200434 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200435}
436
Willy Tarreau27375622013-12-17 00:00:28 +0100437
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100438/* This function is the equivalent to si_update() except that it's
Willy Tarreau615f28b2015-09-23 18:40:09 +0200439 * designed to be called from outside the stream handlers, typically the lower
440 * layers (applets, connections) after I/O completion. After updating the stream
441 * interface and timeouts, it will try to forward what can be forwarded, then to
442 * wake the associated task up if an important event requires special handling.
Willy Tarreaud0f5bbc2018-11-14 11:10:26 +0100443 * It may update SI_FL_WAIT_DATA and/or SI_FL_RXBLK_ROOM, that the callers are
Willy Tarreau0dfccb22018-10-25 13:55:20 +0200444 * encouraged to watch to take appropriate action.
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100445 * It should not be called from within the stream itself, si_update()
Willy Tarreau615f28b2015-09-23 18:40:09 +0200446 * is designed for this.
447 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100448static void stream_int_notify(struct stream_interface *si)
Willy Tarreau615f28b2015-09-23 18:40:09 +0200449{
450 struct channel *ic = si_ic(si);
451 struct channel *oc = si_oc(si);
Willy Tarreau47baeb82018-11-15 07:46:57 +0100452 struct stream_interface *sio = si_opposite(si);
Christopher Fauletd7607de2019-01-03 16:24:54 +0100453 struct task *task = si_task(si);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200454
455 /* process consumer side */
456 if (channel_is_empty(oc)) {
Olivier Houcharde9bed532017-11-16 17:49:25 +0100457 struct connection *conn = objt_cs(si->end) ? objt_cs(si->end)->conn : NULL;
458
Willy Tarreau615f28b2015-09-23 18:40:09 +0200459 if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) &&
Olivier Houcharde9bed532017-11-16 17:49:25 +0100460 (si->state == SI_ST_EST) && (!conn || !(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS))))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200461 si_shutw(si);
462 oc->wex = TICK_ETERNITY;
463 }
464
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100465 /* indicate that we may be waiting for data from the output channel or
466 * we're about to close and can't expect more data if SHUTW_NOW is there.
467 */
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200468 if (!(oc->flags & (CF_SHUTW|CF_SHUTW_NOW)))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200469 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100470 else if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)
471 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200472
473 /* update OC timeouts and wake the other side up if it's waiting for room */
474 if (oc->flags & CF_WRITE_ACTIVITY) {
475 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
476 !channel_is_empty(oc))
477 if (tick_isset(oc->wex))
478 oc->wex = tick_add_ifset(now_ms, oc->wto);
479
480 if (!(si->flags & SI_FL_INDEP_STR))
481 if (tick_isset(ic->rex))
482 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreauf26c26c2018-11-12 16:11:08 +0100483 }
Willy Tarreau615f28b2015-09-23 18:40:09 +0200484
Willy Tarreau47baeb82018-11-15 07:46:57 +0100485 if ((sio->flags & SI_FL_RXBLK_ROOM) &&
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100486 ((oc->flags & CF_WRITE_PARTIAL) || channel_is_empty(oc)))
Willy Tarreaudb398432018-11-15 11:08:52 +0100487 si_rx_room_rdy(sio);
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100488
489 if (oc->flags & CF_DONT_READ)
490 si_rx_chan_blk(sio);
491 else
492 si_rx_chan_rdy(sio);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200493
494 /* Notify the other side when we've injected data into the IC that
495 * needs to be forwarded. We can do fast-forwarding as soon as there
496 * are output data, but we avoid doing this if some of the data are
497 * not yet scheduled for being forwarded, because it is very likely
498 * that it will be done again immediately afterwards once the following
Willy Tarreaud0f5bbc2018-11-14 11:10:26 +0100499 * data are parsed (eg: HTTP chunking). We only SI_FL_RXBLK_ROOM once
Willy Tarreau615f28b2015-09-23 18:40:09 +0200500 * we've emptied *some* of the output buffer, and not just when there
501 * is available room, because applets are often forced to stop before
502 * the buffer is full. We must not stop based on input data alone because
503 * an HTTP parser might need more data to complete the parsing.
504 */
505 if (!channel_is_empty(ic) &&
Willy Tarreau47baeb82018-11-15 07:46:57 +0100506 (sio->flags & SI_FL_WAIT_DATA) &&
Willy Tarreau89b6a2b2018-11-18 15:46:10 +0100507 (!(ic->flags & CF_EXPECT_MORE) || c_full(ic) || ci_data(ic) == 0 || ic->pipe)) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200508 int new_len, last_len;
509
Willy Tarreau77e478c2018-06-19 07:03:14 +0200510 last_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200511 if (ic->pipe)
512 last_len += ic->pipe->data;
513
Willy Tarreau47baeb82018-11-15 07:46:57 +0100514 si_chk_snd(sio);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200515
Willy Tarreau77e478c2018-06-19 07:03:14 +0200516 new_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200517 if (ic->pipe)
518 new_len += ic->pipe->data;
519
520 /* check if the consumer has freed some space either in the
521 * buffer or in the pipe.
522 */
Willy Tarreau47baeb82018-11-15 07:46:57 +0100523 if (new_len < last_len)
Willy Tarreaudb398432018-11-15 11:08:52 +0100524 si_rx_room_rdy(si);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200525 }
526
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100527 if (!(ic->flags & CF_DONT_READ))
528 si_rx_chan_rdy(si);
529
Willy Tarreau47baeb82018-11-15 07:46:57 +0100530 si_chk_rcv(si);
531 si_chk_rcv(sio);
532
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100533 if (si_rx_blocked(si)) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200534 ic->rex = TICK_ETERNITY;
535 }
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100536 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL)) == CF_READ_PARTIAL) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200537 /* we must re-enable reading if si_chk_snd() has freed some space */
538 if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex))
539 ic->rex = tick_add_ifset(now_ms, ic->rto);
540 }
541
542 /* wake the task up only when needed */
543 if (/* changes on the production side */
544 (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
Willy Tarreaub69f1712018-11-08 14:32:16 +0100545 (si->state != SI_ST_EST && si->state != SI_ST_CON) ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200546 (si->flags & SI_FL_ERR) ||
547 ((ic->flags & CF_READ_PARTIAL) &&
Christopher Faulet297d3e22019-03-22 14:16:14 +0100548 ((ic->flags & CF_EOI) || !ic->to_forward || sio->state != SI_ST_EST)) ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200549
550 /* changes on the consumption side */
551 (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
Willy Tarreauede3d882018-10-24 17:17:56 +0200552 ((oc->flags & CF_WRITE_ACTIVITY) &&
Willy Tarreau615f28b2015-09-23 18:40:09 +0200553 ((oc->flags & CF_SHUTW) ||
Willy Tarreau78f5ff82018-12-19 11:00:00 +0100554 (((oc->flags & CF_WAKE_WRITE) ||
555 !(oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW|CF_SHUTW))) &&
Willy Tarreau47baeb82018-11-15 07:46:57 +0100556 (sio->state != SI_ST_EST ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200557 (channel_is_empty(oc) && !oc->to_forward)))))) {
Christopher Fauletd7607de2019-01-03 16:24:54 +0100558 task_wakeup(task, TASK_WOKEN_IO);
559 }
560 else {
561 /* Update expiration date for the task and requeue it */
562 task->expire = tick_first((tick_is_expired(task->expire, now_ms) ? 0 : task->expire),
563 tick_first(tick_first(ic->rex, ic->wex),
564 tick_first(oc->rex, oc->wex)));
565 task_queue(task);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200566 }
567 if (ic->flags & CF_READ_ACTIVITY)
568 ic->flags &= ~CF_READ_DONTWAIT;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200569}
570
571
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200572/* Called by I/O handlers after completion.. It propagates
Willy Tarreau651e1822015-09-23 20:06:13 +0200573 * connection flags to the stream interface, updates the stream (which may or
574 * may not take this opportunity to try to forward data), then update the
575 * connection's polling based on the channels and stream interface's final
576 * states. The function always returns 0.
Willy Tarreau100c4672012-08-20 12:06:26 +0200577 */
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200578static int si_cs_process(struct conn_stream *cs)
Willy Tarreaufd31e532012-07-23 18:24:25 +0200579{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200580 struct connection *conn = cs->conn;
581 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100582 struct channel *ic = si_ic(si);
583 struct channel *oc = si_oc(si);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200584
Olivier Houchardc7ffa912018-08-28 19:37:41 +0200585 /* If we have data to send, try it now */
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100586 if (!channel_is_empty(oc) && !(si->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau908d26f2018-10-25 14:02:47 +0200587 si_cs_send(cs);
588
Willy Tarreau651e1822015-09-23 20:06:13 +0200589 /* First step, report to the stream-int what was detected at the
590 * connection layer : errors and connection establishment.
591 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200592 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreau3c55ec22012-07-23 19:19:51 +0200593 si->flags |= SI_FL_ERR;
594
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200595 /* If we had early data, and the handshake ended, then
596 * we can remove the flag, and attempt to wake the task up,
597 * in the event there's an analyser waiting for the end of
598 * the handshake.
599 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +0100600 if (!(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS)) &&
601 (cs->flags & CS_FL_WAIT_FOR_HS)) {
602 cs->flags &= ~CS_FL_WAIT_FOR_HS;
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200603 task_wakeup(si_task(si), TASK_WOKEN_MSG);
604 }
605
Willy Tarreau52821e22017-03-18 17:11:37 +0100606 if ((si->state < SI_ST_EST) &&
607 (conn->flags & (CO_FL_CONNECTED | CO_FL_HANDSHAKE)) == CO_FL_CONNECTED) {
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200608 si->exp = TICK_ETERNITY;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100609 oc->flags |= CF_WRITE_NULL;
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200610 }
611
Christopher Faulet297d3e22019-03-22 14:16:14 +0100612 /* Report EOI on the channel if it was reached from the mux point of
613 * view. */
614 if ((cs->flags & CS_FL_EOI) && !(ic->flags & CF_EOI))
Christopher Faulet8e9e3ef2019-05-17 09:14:10 +0200615 ic->flags |= (CF_EOI|CF_READ_PARTIAL);
Christopher Faulet203b2b02019-03-08 09:23:46 +0100616
Willy Tarreau651e1822015-09-23 20:06:13 +0200617 /* Second step : update the stream-int and channels, try to forward any
618 * pending data, then possibly wake the stream up based on the new
619 * stream-int status.
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200620 */
Willy Tarreau651e1822015-09-23 20:06:13 +0200621 stream_int_notify(si);
Christopher Fauleta73e59b2016-12-09 17:30:18 +0100622 channel_release_buffer(ic, &(si_strm(si)->buffer_wait));
Willy Tarreauea3cc482015-09-23 19:37:00 +0200623
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200624 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200625}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200626
Willy Tarreau5368d802012-08-21 18:22:06 +0200627/*
628 * This function is called to send buffer data to a stream socket.
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200629 * It calls the mux layer's snd_buf function. It relies on the
Godbach4f489902013-12-04 17:24:06 +0800630 * caller to commit polling changes. The caller should check conn->flags
631 * for errors.
Willy Tarreau5368d802012-08-21 18:22:06 +0200632 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +0200633int si_cs_send(struct conn_stream *cs)
Willy Tarreau5368d802012-08-21 18:22:06 +0200634{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200635 struct connection *conn = cs->conn;
636 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100637 struct channel *oc = si_oc(si);
Willy Tarreau5368d802012-08-21 18:22:06 +0200638 int ret;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200639 int did_send = 0;
640
641 /* We're already waiting to be able to send, give up */
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100642 if (si->wait_event.events & SUB_RETRY_SEND)
Olivier Houchardf6535282018-08-31 17:29:12 +0200643 return 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200644
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100645 if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
646 si->flags |= SI_FL_ERR;
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200647 return 1;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100648 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200649
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200650 /* we might have been called just after an asynchronous shutw */
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100651 if (conn->flags & CO_FL_SOCK_WR_SH || oc->flags & CF_SHUTW)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200652 return 1;
Willy Tarreau5368d802012-08-21 18:22:06 +0200653
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200654 if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) {
655 ret = conn->mux->snd_pipe(cs, oc->pipe);
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200656 if (ret > 0) {
Willy Tarreauede3d882018-10-24 17:17:56 +0200657 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200658 did_send = 1;
659 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200660
Willy Tarreauafc8a222014-11-28 15:46:27 +0100661 if (!oc->pipe->data) {
662 put_pipe(oc->pipe);
663 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200664 }
665
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100666 if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
667 si->flags |= SI_FL_ERR;
Christopher Faulet5ed7aab2018-11-19 22:02:07 +0100668 return 1;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100669 }
Christopher Faulet3f76f4c2018-11-20 10:21:08 +0100670
671 if (oc->pipe)
672 goto end;
Willy Tarreau5368d802012-08-21 18:22:06 +0200673 }
674
675 /* At this point, the pipe is empty, but we may still have data pending
676 * in the normal buffer.
677 */
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100678 if (co_data(oc)) {
679 /* when we're here, we already know that there is no spliced
680 * data left, and that there are sendable buffered data.
681 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200682
Willy Tarreau5368d802012-08-21 18:22:06 +0200683 /* check if we want to inform the kernel that we're interested in
684 * sending more data after this call. We want this if :
685 * - we're about to close after this last send and want to merge
686 * the ongoing FIN with the last segment.
687 * - we know we can't send everything at once and must get back
688 * here because of unaligned data
689 * - there is still a finite amount of data to forward
690 * The test is arranged so that the most common case does only 2
691 * tests.
692 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100693 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200694
Willy Tarreauafc8a222014-11-28 15:46:27 +0100695 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
696 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
Willy Tarreau4ac49282017-10-17 16:33:46 +0200697 (oc->flags & CF_EXPECT_MORE))) ||
Willy Tarreauecd2e152017-11-07 15:07:25 +0100698 ((oc->flags & CF_ISRESP) &&
699 ((oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW)) == (CF_AUTO_CLOSE|CF_SHUTW_NOW))))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100700 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200701
Willy Tarreauafc8a222014-11-28 15:46:27 +0100702 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100703 send_flag |= CO_SFL_STREAMER;
704
Olivier Houcharda254a372019-04-05 15:30:12 +0200705 if ((si->flags & SI_FL_L7_RETRY) && !b_data(&si->l7_buffer)) {
Olivier Houchardce1a0292019-05-17 15:38:29 +0200706 struct stream *s = si_strm(si);
Olivier Houcharda254a372019-04-05 15:30:12 +0200707 /* If we want to be able to do L7 retries, copy
708 * the data we're about to send, so that we are able
709 * to resend them if needed
710 */
711 /* Try to allocate a buffer if we had none.
712 * If it fails, the next test will just
713 * disable the l7 retries by setting
714 * l7_conn_retries to 0.
715 */
Olivier Houchardce1a0292019-05-17 15:38:29 +0200716 if (!s->txn || (s->txn->req.msg_state != HTTP_MSG_DONE))
Olivier Houcharda254a372019-04-05 15:30:12 +0200717 si->flags &= ~SI_FL_L7_RETRY;
718 else {
719 if (b_is_null(&si->l7_buffer))
720 b_alloc(&si->l7_buffer);
721 if (b_is_null(&si->l7_buffer))
722 si->flags &= ~SI_FL_L7_RETRY;
723 else {
724 memcpy(b_orig(&si->l7_buffer),
725 b_orig(&oc->buf),
726 b_size(&oc->buf));
727 si->l7_buffer.head = co_data(oc);
728 b_add(&si->l7_buffer, co_data(oc));
729 }
730
731 }
732 }
733
Olivier Houcharded0f2072018-08-16 15:41:52 +0200734 ret = cs->conn->mux->snd_buf(cs, &oc->buf, co_data(oc), send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800735 if (ret > 0) {
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200736 did_send = 1;
Willy Tarreauede3d882018-10-24 17:17:56 +0200737 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Willy Tarreau5368d802012-08-21 18:22:06 +0200738
Willy Tarreau77e478c2018-06-19 07:03:14 +0200739 co_set_data(oc, co_data(oc) - ret);
Willy Tarreaudeccd112018-06-14 18:38:55 +0200740 c_realign_if_empty(oc);
741
742 if (!co_data(oc)) {
Godbache68e02d2013-10-11 15:48:29 +0800743 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100744 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800745 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200746
Godbache68e02d2013-10-11 15:48:29 +0800747 /* if some data remain in the buffer, it's only because the
748 * system buffers are full, we will try next time.
749 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200750 }
Christopher Faulete4acd5e2018-11-20 09:34:35 +0100751
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100752 if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
753 si->flags |= SI_FL_ERR;
Christopher Faulete4acd5e2018-11-20 09:34:35 +0100754 return 1;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100755 }
Godbache68e02d2013-10-11 15:48:29 +0800756 }
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100757
Willy Tarreauf6975aa2018-11-15 14:33:05 +0100758 end:
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200759 /* 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 +0100760 if (!channel_is_empty(oc))
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100761 conn->mux->subscribe(cs, SUB_RETRY_SEND, &si->wait_event);
Olivier Houchardf6535282018-08-31 17:29:12 +0200762 return did_send;
Willy Tarreau5368d802012-08-21 18:22:06 +0200763}
764
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100765/* This is the ->process() function for any stream-interface's wait_event task.
766 * It's assigned during the stream-interface's initialization, for any type of
767 * stream interface. Thus it is always safe to perform a tasklet_wakeup() on a
768 * stream interface, as the presence of the CS is checked there.
769 */
Olivier Houchard91894cb2018-08-02 18:06:28 +0200770struct task *si_cs_io_cb(struct task *t, void *ctx, unsigned short state)
771{
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200772 struct stream_interface *si = ctx;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200773 struct conn_stream *cs = objt_cs(si->end);
Olivier Houchardf6535282018-08-31 17:29:12 +0200774 int ret = 0;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200775
776 if (!cs)
777 return NULL;
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100778
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100779 if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchardf6535282018-08-31 17:29:12 +0200780 ret = si_cs_send(cs);
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100781 if (!(si->wait_event.events & SUB_RETRY_RECV))
Olivier Houchardf6535282018-08-31 17:29:12 +0200782 ret |= si_cs_recv(cs);
783 if (ret != 0)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200784 si_cs_process(cs);
Olivier Houchardf6535282018-08-31 17:29:12 +0200785
Olivier Houchard91894cb2018-08-02 18:06:28 +0200786 return (NULL);
787}
788
Willy Tarreau25f13102015-09-24 11:32:22 +0200789/* This function is designed to be called from within the stream handler to
790 * update the channels' expiration timers and the stream interface's flags
791 * based on the channels' flags. It needs to be called only once after the
792 * channels' flags have settled down, and before they are cleared, though it
793 * doesn't harm to call it as often as desired (it just slightly hurts
794 * performance). It must not be called from outside of the stream handler,
795 * as what it does will be used to compute the stream task's expiration.
796 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100797void si_update(struct stream_interface *si)
Willy Tarreau25f13102015-09-24 11:32:22 +0200798{
799 struct channel *ic = si_ic(si);
800 struct channel *oc = si_oc(si);
801
802 if (!(ic->flags & CF_SHUTR)) {
803 /* Read not closed, update FD status and timeout for reads */
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100804 if (ic->flags & CF_DONT_READ)
805 si_rx_chan_blk(si);
806 else
807 si_rx_chan_rdy(si);
808
809 if (!channel_is_empty(ic)) {
Willy Tarreauf26c26c2018-11-12 16:11:08 +0100810 /* stop reading, imposed by channel's policy or contents */
Willy Tarreaudb398432018-11-15 11:08:52 +0100811 si_rx_room_blk(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200812 }
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200813 else {
Willy Tarreau25f13102015-09-24 11:32:22 +0200814 /* (re)start reading and update timeout. Note: we don't recompute the timeout
815 * everytime we get here, otherwise it would risk never to expire. We only
816 * update it if is was not yet set. The stream socket handler will already
817 * have updated it if there has been a completed I/O.
818 */
Willy Tarreaudb398432018-11-15 11:08:52 +0100819 si_rx_room_rdy(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200820 }
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100821 if (si->flags & SI_FL_RXBLK_ANY & ~SI_FL_RX_WAIT_EP)
822 ic->rex = TICK_ETERNITY;
823 else if (!(ic->flags & CF_READ_NOEXP) && !tick_isset(ic->rex))
824 ic->rex = tick_add_ifset(now_ms, ic->rto);
825
Willy Tarreau47baeb82018-11-15 07:46:57 +0100826 si_chk_rcv(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200827 }
Willy Tarreauabb5d422018-11-14 16:58:52 +0100828 else
829 si_rx_shut_blk(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200830
831 if (!(oc->flags & CF_SHUTW)) {
832 /* Write not closed, update FD status and timeout for writes */
833 if (channel_is_empty(oc)) {
834 /* stop writing */
835 if (!(si->flags & SI_FL_WAIT_DATA)) {
836 if ((oc->flags & CF_SHUTW_NOW) == 0)
837 si->flags |= SI_FL_WAIT_DATA;
838 oc->wex = TICK_ETERNITY;
839 }
840 }
841 else {
842 /* (re)start writing and update timeout. Note: we don't recompute the timeout
843 * everytime we get here, otherwise it would risk never to expire. We only
844 * update it if is was not yet set. The stream socket handler will already
845 * have updated it if there has been a completed I/O.
846 */
847 si->flags &= ~SI_FL_WAIT_DATA;
848 if (!tick_isset(oc->wex)) {
849 oc->wex = tick_add_ifset(now_ms, oc->wto);
850 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
851 /* Note: depending on the protocol, we don't know if we're waiting
852 * for incoming data or not. So in order to prevent the socket from
853 * expiring read timeouts during writes, we refresh the read timeout,
854 * except if it was already infinite or if we have explicitly setup
855 * independent streams.
856 */
857 ic->rex = tick_add_ifset(now_ms, ic->rto);
858 }
859 }
860 }
861 }
862}
863
Willy Tarreaud14844a2018-11-08 18:15:29 +0100864/* updates both stream ints of a same stream at once */
865/* Updates at once the channel flags, and timers of both stream interfaces of a
866 * same stream, to complete the work after the analysers, then updates the data
867 * layer below. This will ensure that any synchronous update performed at the
868 * data layer will be reflected in the channel flags and/or stream-interface.
869 */
870void si_update_both(struct stream_interface *si_f, struct stream_interface *si_b)
871{
872 struct channel *req = si_ic(si_f);
873 struct channel *res = si_oc(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100874 struct conn_stream *cs;
Willy Tarreaud14844a2018-11-08 18:15:29 +0100875
876 req->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
877 res->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
878
Willy Tarreaud14844a2018-11-08 18:15:29 +0100879 si_f->prev_state = si_f->state;
880 si_b->prev_state = si_b->state;
881
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100882 /* front stream-int */
883 cs = objt_cs(si_f->end);
884 if (cs &&
885 si_f->state == SI_ST_EST &&
886 !(res->flags & CF_SHUTW) && /* Write not closed */
887 !channel_is_empty(res) &&
888 !(cs->flags & CS_FL_ERROR) &&
889 !(cs->conn->flags & CO_FL_ERROR)) {
890 if (si_cs_send(cs))
Willy Tarreaudb398432018-11-15 11:08:52 +0100891 si_rx_room_rdy(si_b);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100892 }
893
894 /* back stream-int */
895 cs = objt_cs(si_b->end);
896 if (cs &&
897 (si_b->state == SI_ST_EST || si_b->state == SI_ST_CON) &&
898 !(req->flags & CF_SHUTW) && /* Write not closed */
899 !channel_is_empty(req) &&
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100900 !(cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) &&
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100901 !(cs->conn->flags & CO_FL_ERROR)) {
902 if (si_cs_send(cs))
Willy Tarreaudb398432018-11-15 11:08:52 +0100903 si_rx_room_rdy(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100904 }
905
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100906 /* let's recompute both sides states */
907 if (si_f->state == SI_ST_EST)
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100908 si_update(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100909
910 if (si_b->state == SI_ST_EST)
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100911 si_update(si_b);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100912
913 /* stream ints are processed outside of process_stream() and must be
914 * handled at the latest moment.
915 */
916 if (obj_type(si_f->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +0100917 ((si_rx_endp_ready(si_f) && !si_rx_blocked(si_f)) ||
918 (si_tx_endp_ready(si_f) && !si_tx_blocked(si_f))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100919 appctx_wakeup(si_appctx(si_f));
Willy Tarreaud14844a2018-11-08 18:15:29 +0100920
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100921 if (obj_type(si_b->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +0100922 ((si_rx_endp_ready(si_b) && !si_rx_blocked(si_b)) ||
923 (si_tx_endp_ready(si_b) && !si_tx_blocked(si_b))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100924 appctx_wakeup(si_appctx(si_b));
Willy Tarreaud14844a2018-11-08 18:15:29 +0100925}
926
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200927/*
928 * This function performs a shutdown-read on a stream interface attached to
929 * a connection in a connected or init state (it does nothing for other
930 * states). It either shuts the read side or marks itself as closed. The buffer
931 * flags are updated to reflect the new state. If the stream interface has
932 * SI_FL_NOHALF, we also forward the close to the write side. If a control
933 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +0200934 * descriptors are then shutdown or closed accordingly. The function
935 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200936 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200937static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200938{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200939 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100940 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200941
Willy Tarreauabb5d422018-11-14 16:58:52 +0100942 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100943 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200944 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100945 ic->flags |= CF_SHUTR;
946 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200947
948 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200949 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200950
Willy Tarreau51d0a7e2019-01-31 19:09:59 +0100951 if (si->flags & SI_FL_KILL_CONN)
952 cs->flags |= CS_FL_KILL_CONN;
953
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100954 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaua553ae92017-10-05 18:52:17 +0200955 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200956 si->state = SI_ST_DIS;
957 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200958 }
959 else if (si->flags & SI_FL_NOHALF) {
960 /* we want to immediately forward this close to the write side */
961 return stream_int_shutw_conn(si);
962 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200963}
964
965/*
966 * This function performs a shutdown-write on a stream interface attached to
967 * a connection in a connected or init state (it does nothing for other
968 * states). It either shuts the write side or marks itself as closed. The
969 * buffer flags are updated to reflect the new state. It does also close
970 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +0100971 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200972 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200973static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200974{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200975 struct conn_stream *cs = __objt_cs(si->end);
976 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100977 struct channel *ic = si_ic(si);
978 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200979
Willy Tarreauafc8a222014-11-28 15:46:27 +0100980 oc->flags &= ~CF_SHUTW_NOW;
981 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200982 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100983 oc->flags |= CF_SHUTW;
984 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +0100985 si_done_get(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200986
Hongbo Longe39683c2017-03-10 18:41:51 +0100987 if (tick_isset(si->hcto)) {
988 ic->rto = si->hcto;
989 ic->rex = tick_add(now_ms, ic->rto);
990 }
991
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200992 switch (si->state) {
993 case SI_ST_EST:
994 /* we have to shut before closing, otherwise some short messages
995 * may never leave the system, especially when there are remaining
996 * unread data in the socket input buffer, or when nolinger is set.
997 * However, if SI_FL_NOLINGER is explicitly set, we know there is
998 * no risk so we close both sides immediately.
999 */
Willy Tarreau51d0a7e2019-01-31 19:09:59 +01001000 if (si->flags & SI_FL_KILL_CONN)
1001 cs->flags |= CS_FL_KILL_CONN;
1002
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001003 if (si->flags & SI_FL_ERR) {
1004 /* quick close, the socket is alredy shut anyway */
1005 }
1006 else if (si->flags & SI_FL_NOLINGER) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001007 /* unclean data-layer shutdown, typically an aborted request
1008 * or a forwarded shutdown from a client to a server due to
1009 * option abortonclose. No need for the TLS layer to try to
1010 * emit a shutdown message.
1011 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001012 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001013 }
1014 else {
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001015 /* clean data-layer shutdown. This only happens on the
1016 * frontend side, or on the backend side when forwarding
1017 * a client close in TCP mode or in HTTP TUNNEL mode
1018 * while option abortonclose is set. We want the TLS
1019 * layer to try to signal it to the peer before we close.
1020 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001021 cs_shutw(cs, CS_SHW_NORMAL);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001022
Willy Tarreaua553ae92017-10-05 18:52:17 +02001023 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
1024 /* OK just a shutw, but we want the caller
1025 * to disable polling on this FD if exists.
1026 */
1027 conn_cond_update_polling(conn);
1028 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001029 }
1030 }
1031
1032 /* fall through */
1033 case SI_ST_CON:
1034 /* we may have to close a pending connection, and mark the
1035 * response buffer as shutr
1036 */
Willy Tarreau51d0a7e2019-01-31 19:09:59 +01001037 if (si->flags & SI_FL_KILL_CONN)
1038 cs->flags |= CS_FL_KILL_CONN;
Willy Tarreaua553ae92017-10-05 18:52:17 +02001039 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001040 /* fall through */
1041 case SI_ST_CER:
1042 case SI_ST_QUE:
1043 case SI_ST_TAR:
1044 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +02001045 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001046 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +01001047 si->flags &= ~SI_FL_NOLINGER;
1048 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001049 ic->flags |= CF_SHUTR;
1050 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001051 si->exp = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +02001052 }
1053}
1054
Willy Tarreau46a8d922012-08-20 12:38:36 +02001055/* This function is used for inter-stream-interface calls. It is called by the
1056 * consumer to inform the producer side that it may be interested in checking
1057 * for free space in the buffer. Note that it intentionally does not update
1058 * timeouts, so that we can still check them later at wake-up. This function is
1059 * dedicated to connection-based stream interfaces.
1060 */
Willy Tarreauc5788912012-08-24 18:12:41 +02001061static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +02001062{
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001063 /* (re)start reading */
Olivier Houchardb2fc04e2019-04-11 13:56:26 +02001064 if (si->state == SI_ST_CON || si->state == SI_ST_EST)
1065 tasklet_wakeup(si->wait_event.task);
Willy Tarreau46a8d922012-08-20 12:38:36 +02001066}
1067
1068
Willy Tarreaude5722c2012-08-20 15:01:10 +02001069/* This function is used for inter-stream-interface calls. It is called by the
1070 * producer to inform the consumer side that it may be interested in checking
1071 * for data in the buffer. Note that it intentionally does not update timeouts,
1072 * so that we can still check them later at wake-up.
1073 */
Willy Tarreauc5788912012-08-24 18:12:41 +02001074static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001075{
Willy Tarreauafc8a222014-11-28 15:46:27 +01001076 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001077 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001078
Olivier Houchardb2fc04e2019-04-11 13:56:26 +02001079 if (unlikely((si->state != SI_ST_CON && si->state != SI_ST_EST) ||
1080 (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +02001081 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001082
Willy Tarreauafc8a222014-11-28 15:46:27 +01001083 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001084 return;
1085
Willy Tarreauafc8a222014-11-28 15:46:27 +01001086 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +01001087 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001088 return;
1089
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001090 if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchard31f04e42018-10-22 16:01:09 +02001091 si_cs_send(cs);
Willy Tarreau33a09a52018-10-25 13:49:49 +02001092
Willy Tarreaubddf7fc2018-12-19 17:17:10 +01001093 if (cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING) || cs->conn->flags & CO_FL_ERROR) {
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001094 /* Write error on the file descriptor */
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001095 si->flags |= SI_FL_ERR;
1096 goto out_wakeup;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001097 }
1098
1099 /* OK, so now we know that some data might have been sent, and that we may
1100 * have to poll first. We have to do that too if the buffer is not empty.
1101 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001102 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001103 /* the connection is established but we can't write. Either the
1104 * buffer is empty, or we just refrain from sending because the
1105 * ->o limit was reached. Maybe we just wrote the last
1106 * chunk and need to close.
1107 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001108 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001109 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreaude5722c2012-08-20 15:01:10 +02001110 (si->state == SI_ST_EST)) {
1111 si_shutw(si);
1112 goto out_wakeup;
1113 }
1114
Willy Tarreauafc8a222014-11-28 15:46:27 +01001115 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001116 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001117 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001118 }
1119 else {
1120 /* Otherwise there are remaining data to be sent in the buffer,
1121 * which means we have to poll before doing so.
1122 */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001123 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001124 if (!tick_isset(oc->wex))
1125 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001126 }
1127
Willy Tarreauafc8a222014-11-28 15:46:27 +01001128 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1129 struct channel *ic = si_ic(si);
1130
Willy Tarreaude5722c2012-08-20 15:01:10 +02001131 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001132 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1133 !channel_is_empty(oc))
1134 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001135
Willy Tarreauafc8a222014-11-28 15:46:27 +01001136 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001137 /* Note: to prevent the client from expiring read timeouts
1138 * during writes, we refresh it. We only do this if the
1139 * interface is not configured for "independent streams",
1140 * because for some applications it's better not to do this,
1141 * for instance when continuously exchanging small amounts
1142 * of data which can full the socket buffers long before a
1143 * write timeout is detected.
1144 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001145 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001146 }
1147 }
1148
1149 /* in case of special condition (error, shutdown, end of write...), we
1150 * have to notify the task.
1151 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001152 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1153 ((oc->flags & CF_WAKE_WRITE) &&
1154 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreaue6300be2014-01-25 02:33:21 +01001155 si->state != SI_ST_EST)))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001156 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001157 if (!(si->flags & SI_FL_DONT_WAKE))
1158 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001159 }
1160}
1161
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001162/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001163 * This is the callback which is called by the connection layer to receive data
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001164 * into the buffer from the connection. It iterates over the mux layer's
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001165 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001166 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +02001167int si_cs_recv(struct conn_stream *cs)
Willy Tarreauce323de2012-08-20 21:41:06 +02001168{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001169 struct connection *conn = cs->conn;
1170 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001171 struct channel *ic = si_ic(si);
Olivier Houchardf6535282018-08-31 17:29:12 +02001172 int ret, max, cur_read = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001173 int read_poll = MAX_READ_POLL_LOOPS;
Christopher Fauletc6618d62018-10-11 15:56:04 +02001174 int flags = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001175
Olivier Houchardf6535282018-08-31 17:29:12 +02001176 /* If another call to si_cs_recv() failed, and we subscribed to
1177 * recv events already, give up now.
1178 */
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001179 if (si->wait_event.events & SUB_RETRY_RECV)
Olivier Houchardf6535282018-08-31 17:29:12 +02001180 return 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001181
Willy Tarreauce323de2012-08-20 21:41:06 +02001182 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001183 if (ic->flags & CF_SHUTR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001184 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001185
Willy Tarreau54e917c2017-08-30 07:35:35 +02001186 /* stop here if we reached the end of data */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001187 if (cs->flags & CS_FL_EOS)
Willy Tarreau54e917c2017-08-30 07:35:35 +02001188 goto out_shutdown_r;
1189
Christopher Fauletf061e422018-12-07 14:51:20 +01001190 /* stop immediately on errors. Note that we DON'T want to stop on
1191 * POLL_ERR, as the poller might report a write error while there
1192 * are still data available in the recv buffer. This typically
1193 * happens when we send too large a request to a backend server
1194 * which rejects it before reading it all.
1195 */
1196 if (!(cs->flags & CS_FL_RCV_MORE)) {
1197 if (!conn_xprt_ready(conn))
1198 return 0;
1199 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
1200 return 1; // We want to make sure si_cs_wake() is called, so that process_strema is woken up, on failure
1201 }
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001202
Willy Tarreau7ab99a32018-12-18 09:15:43 +01001203 /* prepare to detect if the mux needs more room */
1204 cs->flags &= ~CS_FL_WANT_ROOM;
1205
Willy Tarreau77e478c2018-06-19 07:03:14 +02001206 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !co_data(ic) &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001207 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001208 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001209 /* The buffer was empty and nothing was transferred for more
1210 * than one second. This was caused by a pause and not by
1211 * congestion. Reset any streaming mode to reduce latency.
1212 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001213 ic->xfer_small = 0;
1214 ic->xfer_large = 0;
1215 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001216 }
1217
Willy Tarreau96199b12012-08-24 00:46:52 +02001218 /* First, let's see if we may splice data across the channel without
1219 * using a buffer.
1220 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001221 if (conn->xprt->rcv_pipe && conn->mux->rcv_pipe &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001222 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1223 ic->flags & CF_KERN_SPLICING) {
Willy Tarreaud760eec2018-07-10 09:50:25 +02001224 if (c_data(ic)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001225 /* We're embarrassed, there are already data pending in
1226 * the buffer and we don't want to have them at two
1227 * locations at a time. Let's indicate we need some
1228 * place and ask the consumer to hurry.
1229 */
Christopher Fauletc6618d62018-10-11 15:56:04 +02001230 flags |= CO_RFL_BUF_FLUSH;
Willy Tarreau96199b12012-08-24 00:46:52 +02001231 goto abort_splice;
1232 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001233
Willy Tarreauafc8a222014-11-28 15:46:27 +01001234 if (unlikely(ic->pipe == NULL)) {
1235 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1236 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001237 goto abort_splice;
1238 }
1239 }
1240
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001241 ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001242 if (ret < 0) {
1243 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001244 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001245 goto abort_splice;
1246 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001247
Willy Tarreau96199b12012-08-24 00:46:52 +02001248 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001249 if (ic->to_forward != CHN_INFINITE_FORWARD)
1250 ic->to_forward -= ret;
1251 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001252 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001253 ic->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +02001254 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001255
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001256 if (cs->flags & CS_FL_EOS)
Willy Tarreau96199b12012-08-24 00:46:52 +02001257 goto out_shutdown_r;
1258
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001259 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001260 return 1;
Willy Tarreau96199b12012-08-24 00:46:52 +02001261
Willy Tarreau61d39a02013-07-18 21:49:32 +02001262 if (conn->flags & CO_FL_WAIT_ROOM) {
1263 /* the pipe is full or we have read enough data that it
1264 * could soon be full. Let's stop before needing to poll.
1265 */
Willy Tarreaudb398432018-11-15 11:08:52 +01001266 si_rx_room_blk(si);
Willy Tarreauffb12052018-11-15 16:06:02 +01001267 goto done_recv;
Willy Tarreau61d39a02013-07-18 21:49:32 +02001268 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001269
Willy Tarreauce323de2012-08-20 21:41:06 +02001270 /* splice not possible (anymore), let's go on on standard copy */
1271 }
Willy Tarreau81464b42018-11-15 15:52:53 +01001272 else {
1273 /* be sure not to block regular receive path below */
1274 conn->flags &= ~CO_FL_WAIT_ROOM;
1275 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001276
1277 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001278 if (ic->pipe && unlikely(!ic->pipe->data)) {
1279 put_pipe(ic->pipe);
1280 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001281 }
1282
Christopher Fauleta73e59b2016-12-09 17:30:18 +01001283 /* now we'll need a input buffer for the stream */
Willy Tarreau581abd32018-10-25 10:21:41 +02001284 if (!si_alloc_ibuf(si, &(si_strm(si)->buffer_wait)))
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001285 goto end_recv;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001286
Willy Tarreau61d39a02013-07-18 21:49:32 +02001287 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1288 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1289 * that if such an event is not handled above in splice, it will be handled here by
1290 * recv().
1291 */
Olivier Houchardc490efd2018-12-04 15:46:16 +01001292 while ((cs->flags & CS_FL_RCV_MORE) ||
1293 (!(conn->flags & (CO_FL_ERROR | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE)) &&
1294 (!(cs->flags & (CS_FL_ERROR|CS_FL_EOS))) && !(ic->flags & CF_SHUTR))) {
Christopher Faulet4eb7d742018-10-11 15:29:21 +02001295 /* <max> may be null. This is the mux responsibility to set
1296 * CS_FL_RCV_MORE on the CS if more space is needed.
1297 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001298 max = channel_recv_max(ic);
Christopher Faulet9cdd5032019-05-14 22:46:41 +02001299 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 +01001300
Olivier Houchardd247be02018-12-06 16:22:29 +01001301 if (cs->flags & CS_FL_WANT_ROOM)
Willy Tarreaudb398432018-11-15 11:08:52 +01001302 si_rx_room_blk(si);
Willy Tarreau6577b482017-12-10 21:19:33 +01001303
Christopher Fauleteffc3752018-10-31 08:53:54 +01001304 if (cs->flags & CS_FL_READ_PARTIAL) {
1305 if (tick_isset(ic->rex))
1306 ic->rex = tick_add_ifset(now_ms, ic->rto);
1307 cs->flags &= ~CS_FL_READ_PARTIAL;
1308 }
1309
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001310 if (ret <= 0) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001311 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001312 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001313
Olivier Houcharda254a372019-04-05 15:30:12 +02001314 if (si->flags & SI_FL_L7_RETRY) {
1315 struct htx *htx;
1316 struct htx_sl *sl;
1317
1318 htx = htxbuf(&ic->buf);
1319 if (htx) {
Christopher Faulet297fbb42019-05-13 14:41:27 +02001320 sl = http_get_stline(htx);
Olivier Houcharda254a372019-04-05 15:30:12 +02001321 if (sl && l7_status_match(si_strm(si)->be,
1322 sl->info.res.status)) {
1323 /* If we got a status for which we would
1324 * like to retry the request, empty
1325 * the buffer and pretend there's an
1326 * error on the channel.
1327 */
1328 ic->flags |= CF_READ_ERROR;
1329 htx_reset(htx);
1330 return 1;
1331 }
1332 }
1333 si->flags &= ~SI_FL_L7_RETRY;
1334 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001335 cur_read += ret;
1336
1337 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001338 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001339 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001340 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1341 if (fwd > ic->to_forward)
1342 fwd = ic->to_forward;
1343 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001344 }
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001345 c_adv(ic, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001346 }
1347
Willy Tarreauafc8a222014-11-28 15:46:27 +01001348 ic->flags |= CF_READ_PARTIAL;
1349 ic->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001350
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001351 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
1352 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001353 si_rx_chan_blk(si);
Willy Tarreau62dd6982017-11-18 11:26:20 +01001354 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001355 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001356
1357 /* if too many bytes were missing from last read, it means that
1358 * it's pointless trying to read again because the system does
1359 * not have them in buffers.
1360 */
1361 if (ret < max) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001362 /* if a streamer has read few data, it may be because we
1363 * have exhausted system buffers. It's not worth trying
1364 * again.
1365 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001366 if (ic->flags & CF_STREAMER) {
1367 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001368 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001369 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001370 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001371
1372 /* if we read a large block smaller than what we requested,
1373 * it's almost certain we'll never get anything more.
1374 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001375 if (ret >= global.tune.recv_enough) {
1376 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001377 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001378 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001379 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001380 }
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001381
1382 /* if we are waiting for more space, don't try to read more data
1383 * right now.
1384 */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001385 if (si_rx_blocked(si))
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001386 break;
Willy Tarreauce323de2012-08-20 21:41:06 +02001387 } /* while !flags */
1388
Willy Tarreauffb12052018-11-15 16:06:02 +01001389 done_recv:
Willy Tarreauc5890e62014-02-09 17:47:01 +01001390 if (cur_read) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001391 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001392 (cur_read <= ic->buf.size / 2)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001393 ic->xfer_large = 0;
1394 ic->xfer_small++;
1395 if (ic->xfer_small >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001396 /* we have read less than half of the buffer in
1397 * one pass, and this happened at least 3 times.
1398 * This is definitely not a streamer.
1399 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001400 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001401 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001402 else if (ic->xfer_small >= 2) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001403 /* if the buffer has been at least half full twice,
1404 * we receive faster than we send, so at least it
1405 * is not a "fast streamer".
1406 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001407 ic->flags &= ~CF_STREAMER_FAST;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001408 }
1409 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001410 else if (!(ic->flags & CF_STREAMER_FAST) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001411 (cur_read >= ic->buf.size - global.tune.maxrewrite)) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001412 /* we read a full buffer at once */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001413 ic->xfer_small = 0;
1414 ic->xfer_large++;
1415 if (ic->xfer_large >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001416 /* we call this buffer a fast streamer if it manages
1417 * to be filled in one call 3 consecutive times.
1418 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001419 ic->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001420 }
1421 }
1422 else {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001423 ic->xfer_small = 0;
1424 ic->xfer_large = 0;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001425 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001426 ic->last_read = now_ms;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001427 }
1428
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001429 end_recv:
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001430 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001431 return 1;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001432
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001433 if (cs->flags & CS_FL_EOS)
Willy Tarreauce323de2012-08-20 21:41:06 +02001434 /* connection closed */
1435 goto out_shutdown_r;
1436
Willy Tarreau32742fd2018-11-14 14:07:59 +01001437 /* Subscribe to receive events if we're blocking on I/O */
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001438 if (!si_rx_blocked(si)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001439 conn->mux->subscribe(cs, SUB_RETRY_RECV, &si->wait_event);
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001440 si_rx_endp_done(si);
1441 } else {
1442 si_rx_endp_more(si);
1443 }
Olivier Houchardf6535282018-08-31 17:29:12 +02001444
Willy Tarreau32742fd2018-11-14 14:07:59 +01001445 return (cur_read != 0) || si_rx_blocked(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001446
1447 out_shutdown_r:
Olivier Houchardfd0c2dc2018-12-13 15:38:16 +01001448 if (conn->flags & CO_FL_CONNECTED) {
1449 /* we received a shutdown */
1450 ic->flags |= CF_READ_NULL;
1451 if (ic->flags & CF_AUTO_CLOSE)
1452 channel_shutw_now(ic);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +01001453 stream_int_read0(si);
Olivier Houchardfd0c2dc2018-12-13 15:38:16 +01001454 }
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001455 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001456}
1457
1458/*
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001459 * This function propagates a null read received on a socket-based connection.
1460 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001461 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001462 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +01001463static void stream_int_read0(struct stream_interface *si)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001464{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001465 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001466 struct channel *ic = si_ic(si);
1467 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001468
Willy Tarreauabb5d422018-11-14 16:58:52 +01001469 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001470 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001471 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001472 ic->flags |= CF_SHUTR;
1473 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001474
1475 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1476 return;
1477
Willy Tarreauafc8a222014-11-28 15:46:27 +01001478 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001479 goto do_close;
1480
1481 if (si->flags & SI_FL_NOHALF) {
1482 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001483 /* force flag on ssl to keep stream in cache */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001484 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001485 goto do_close;
1486 }
1487
1488 /* otherwise that's just a normal read shutdown */
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001489 return;
1490
1491 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001492 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaua553ae92017-10-05 18:52:17 +02001493 cs_close(cs);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001494
Willy Tarreauafc8a222014-11-28 15:46:27 +01001495 oc->flags &= ~CF_SHUTW_NOW;
1496 oc->flags |= CF_SHUTW;
1497 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001498
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001499 si_done_get(si);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001500
Olivier Houchardaacc4052019-05-21 17:43:50 +02001501 /* Don't change the state to SI_ST_DIS yet if we're still
1502 * in SI_ST_CON, otherwise it means sess_establish() hasn't
1503 * been called yet, and so the analysers would not run.
1504 */
1505 if (si->state == SI_ST_EST)
1506 si->state = SI_ST_DIS;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001507 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001508 return;
1509}
1510
Willy Tarreau651e1822015-09-23 20:06:13 +02001511/* Callback to be used by applet handlers upon completion. It updates the stream
1512 * (which may or may not take this opportunity to try to forward data), then
Emeric Brun2802b072017-06-30 14:11:56 +02001513 * may re-enable the applet's based on the channels and stream interface's final
Willy Tarreau651e1822015-09-23 20:06:13 +02001514 * states.
1515 */
Willy Tarreauaa977ba2015-09-25 11:45:06 +02001516void si_applet_wake_cb(struct stream_interface *si)
Willy Tarreaue5f86492015-04-19 15:16:35 +02001517{
Willy Tarreaueca572f2015-09-25 19:11:55 +02001518 struct channel *ic = si_ic(si);
1519
1520 /* If the applet wants to write and the channel is closed, it's a
1521 * broken pipe and it must be reported.
1522 */
Willy Tarreau05b9b642018-11-14 13:43:35 +01001523 if (!(si->flags & SI_FL_RX_WAIT_EP) && (ic->flags & CF_SHUTR))
Willy Tarreaueca572f2015-09-25 19:11:55 +02001524 si->flags |= SI_FL_ERR;
1525
Willy Tarreau186dcdd2018-11-16 16:18:34 +01001526 /* automatically mark the applet having data available if it reported
1527 * begin blocked by the channel.
1528 */
1529 if (si_rx_blocked(si))
1530 si_rx_endp_more(si);
1531
Willy Tarreau651e1822015-09-23 20:06:13 +02001532 /* update the stream-int, channels, and possibly wake the stream up */
1533 stream_int_notify(si);
Willy Tarreaue5f86492015-04-19 15:16:35 +02001534
Willy Tarreau32742fd2018-11-14 14:07:59 +01001535 /* stream_int_notify may have passed through chk_snd and released some
1536 * RXBLK flags. Process_stream will consider those flags to wake up the
1537 * appctx but in the case the task is not in runqueue we may have to
1538 * wakeup the appctx immediately.
Emeric Brun2802b072017-06-30 14:11:56 +02001539 */
Olivier Houchard51205a12019-04-17 19:29:35 +02001540 if ((si_rx_endp_ready(si) && !si_rx_blocked(si)) ||
1541 (si_tx_endp_ready(si) && !si_tx_blocked(si)))
Willy Tarreau563cc372015-04-19 18:13:56 +02001542 appctx_wakeup(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001543}
1544
1545/*
1546 * This function performs a shutdown-read on a stream interface attached to an
1547 * applet in a connected or init state (it does nothing for other states). It
1548 * either shuts the read side or marks itself as closed. The buffer flags are
1549 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1550 * we also forward the close to the write side. The owner task is woken up if
1551 * it exists.
1552 */
1553static void stream_int_shutr_applet(struct stream_interface *si)
1554{
1555 struct channel *ic = si_ic(si);
1556
Willy Tarreauabb5d422018-11-14 16:58:52 +01001557 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001558 if (ic->flags & CF_SHUTR)
1559 return;
1560 ic->flags |= CF_SHUTR;
1561 ic->rex = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001562
Willy Tarreau828824a2015-04-19 17:20:03 +02001563 /* Note: on shutr, we don't call the applet */
1564
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001565 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1566 return;
1567
1568 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau958f0742015-09-25 20:24:26 +02001569 si_applet_release(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001570 si->state = SI_ST_DIS;
1571 si->exp = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001572 }
1573 else if (si->flags & SI_FL_NOHALF) {
1574 /* we want to immediately forward this close to the write side */
1575 return stream_int_shutw_applet(si);
1576 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001577}
1578
1579/*
1580 * This function performs a shutdown-write on a stream interface attached to an
1581 * applet in a connected or init state (it does nothing for other states). It
1582 * either shuts the write side or marks itself as closed. The buffer flags are
1583 * updated to reflect the new state. It does also close everything if the SI
1584 * was marked as being in error state. The owner task is woken up if it exists.
1585 */
1586static void stream_int_shutw_applet(struct stream_interface *si)
1587{
1588 struct channel *ic = si_ic(si);
1589 struct channel *oc = si_oc(si);
1590
1591 oc->flags &= ~CF_SHUTW_NOW;
1592 if (oc->flags & CF_SHUTW)
1593 return;
1594 oc->flags |= CF_SHUTW;
1595 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001596 si_done_get(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001597
Hongbo Longe39683c2017-03-10 18:41:51 +01001598 if (tick_isset(si->hcto)) {
1599 ic->rto = si->hcto;
1600 ic->rex = tick_add(now_ms, ic->rto);
1601 }
1602
Willy Tarreau828824a2015-04-19 17:20:03 +02001603 /* on shutw we always wake the applet up */
1604 appctx_wakeup(si_appctx(si));
1605
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001606 switch (si->state) {
1607 case SI_ST_EST:
1608 /* we have to shut before closing, otherwise some short messages
1609 * may never leave the system, especially when there are remaining
1610 * unread data in the socket input buffer, or when nolinger is set.
1611 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1612 * no risk so we close both sides immediately.
1613 */
1614 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1615 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1616 return;
1617
1618 /* fall through */
1619 case SI_ST_CON:
1620 case SI_ST_CER:
1621 case SI_ST_QUE:
1622 case SI_ST_TAR:
1623 /* Note that none of these states may happen with applets */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001624 si_applet_release(si);
Willy Tarreau958f0742015-09-25 20:24:26 +02001625 si->state = SI_ST_DIS;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001626 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +01001627 si->flags &= ~SI_FL_NOLINGER;
1628 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001629 ic->flags |= CF_SHUTR;
1630 ic->rex = TICK_ETERNITY;
1631 si->exp = TICK_ETERNITY;
1632 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001633}
1634
1635/* chk_rcv function for applets */
1636static void stream_int_chk_rcv_applet(struct stream_interface *si)
1637{
1638 struct channel *ic = si_ic(si);
1639
1640 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1641 __FUNCTION__,
1642 si, si->state, ic->flags, si_oc(si)->flags);
1643
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001644 if (!ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001645 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001646 appctx_wakeup(si_appctx(si));
Thierry FOURNIER5bc2cbf2015-09-04 18:40:36 +02001647 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001648}
1649
1650/* chk_snd function for applets */
1651static void stream_int_chk_snd_applet(struct stream_interface *si)
1652{
1653 struct channel *oc = si_oc(si);
1654
1655 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1656 __FUNCTION__,
1657 si, si->state, si_ic(si)->flags, oc->flags);
1658
1659 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1660 return;
1661
Willy Tarreau828824a2015-04-19 17:20:03 +02001662 /* we only wake the applet up if it was waiting for some data */
1663
1664 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001665 return;
1666
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001667 if (!tick_isset(oc->wex))
1668 oc->wex = tick_add_ifset(now_ms, oc->wto);
1669
Willy Tarreau828824a2015-04-19 17:20:03 +02001670 if (!channel_is_empty(oc)) {
1671 /* (re)start sending */
1672 appctx_wakeup(si_appctx(si));
1673 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001674}
1675
Willy Tarreaudded32d2008-11-30 19:48:07 +01001676/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001677 * Local variables:
1678 * c-indent-level: 8
1679 * c-basic-offset: 8
1680 * End:
1681 */