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Willy Tarreaucff64112008-11-03 06:26:53 +01001/*
2 * Functions managing stream_interface structures
3 *
Willy Tarreauf873d752012-05-11 17:47:17 +02004 * Copyright 2000-2012 Willy Tarreau <w@1wt.eu>
Willy Tarreaucff64112008-11-03 06:26:53 +01005 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13#include <errno.h>
14#include <fcntl.h>
15#include <stdio.h>
16#include <stdlib.h>
17
18#include <sys/socket.h>
19#include <sys/stat.h>
20#include <sys/types.h>
21
Willy Tarreaubf883e02014-11-25 21:10:35 +010022#include <common/buffer.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010023#include <common/compat.h>
24#include <common/config.h>
25#include <common/debug.h>
26#include <common/standard.h>
27#include <common/ticks.h>
28#include <common/time.h>
29
Willy Tarreau8a8d83b2015-04-13 13:24:54 +020030#include <proto/applet.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020031#include <proto/channel.h>
Willy Tarreau8b117082012-08-06 15:06:49 +020032#include <proto/connection.h>
Olivier Houchard9aaf7782017-09-13 18:30:23 +020033#include <proto/mux_pt.h>
Willy Tarreau96199b12012-08-24 00:46:52 +020034#include <proto/pipe.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020035#include <proto/stream.h>
Willy Tarreau269358d2009-09-20 20:14:49 +020036#include <proto/stream_interface.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010037#include <proto/task.h>
38
Willy Tarreaufd31e532012-07-23 18:24:25 +020039#include <types/pipe.h>
40
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010041/* functions used by default on a detached stream-interface */
Willy Tarreau6fe15412013-09-29 15:16:03 +020042static void stream_int_shutr(struct stream_interface *si);
43static void stream_int_shutw(struct stream_interface *si);
Willy Tarreauf873d752012-05-11 17:47:17 +020044static void stream_int_chk_rcv(struct stream_interface *si);
45static void stream_int_chk_snd(struct stream_interface *si);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010046
47/* functions used on a conn_stream-based stream-interface */
Willy Tarreau6fe15412013-09-29 15:16:03 +020048static void stream_int_shutr_conn(struct stream_interface *si);
49static void stream_int_shutw_conn(struct stream_interface *si);
Willy Tarreauc5788912012-08-24 18:12:41 +020050static void stream_int_chk_rcv_conn(struct stream_interface *si);
51static void stream_int_chk_snd_conn(struct stream_interface *si);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010052
53/* functions used on an applet-based stream-interface */
Willy Tarreaud45b9f82015-04-13 16:30:14 +020054static void stream_int_shutr_applet(struct stream_interface *si);
55static void stream_int_shutw_applet(struct stream_interface *si);
56static void stream_int_chk_rcv_applet(struct stream_interface *si);
57static void stream_int_chk_snd_applet(struct stream_interface *si);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010058
59/* last read notification */
60static void stream_int_read0(struct stream_interface *si);
61
62/* post-IO notification callback */
63static void stream_int_notify(struct stream_interface *si);
Willy Tarreauf873d752012-05-11 17:47:17 +020064
Willy Tarreauc5788912012-08-24 18:12:41 +020065/* stream-interface operations for embedded tasks */
66struct si_ops si_embedded_ops = {
Willy Tarreau5c979a92012-05-07 17:15:39 +020067 .chk_rcv = stream_int_chk_rcv,
68 .chk_snd = stream_int_chk_snd,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020069 .shutr = stream_int_shutr,
70 .shutw = stream_int_shutw,
Willy Tarreau5c979a92012-05-07 17:15:39 +020071};
72
Willy Tarreauc5788912012-08-24 18:12:41 +020073/* stream-interface operations for connections */
74struct si_ops si_conn_ops = {
Willy Tarreauc5788912012-08-24 18:12:41 +020075 .chk_rcv = stream_int_chk_rcv_conn,
76 .chk_snd = stream_int_chk_snd_conn,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020077 .shutr = stream_int_shutr_conn,
78 .shutw = stream_int_shutw_conn,
Willy Tarreauc5788912012-08-24 18:12:41 +020079};
80
Willy Tarreaud45b9f82015-04-13 16:30:14 +020081/* stream-interface operations for connections */
82struct si_ops si_applet_ops = {
Willy Tarreaud45b9f82015-04-13 16:30:14 +020083 .chk_rcv = stream_int_chk_rcv_applet,
84 .chk_snd = stream_int_chk_snd_applet,
85 .shutr = stream_int_shutr_applet,
86 .shutw = stream_int_shutw_applet,
87};
88
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010089
90/* Functions used to communicate with a conn_stream. The first two may be used
91 * directly, the last one is mostly a wake callback.
92 */
93int si_cs_recv(struct conn_stream *cs);
94int si_cs_send(struct conn_stream *cs);
95static int si_cs_process(struct conn_stream *cs);
96
97
Willy Tarreau74beec32012-10-03 00:41:04 +020098struct data_cb si_conn_cb = {
Olivier Houchard21df6cc2018-09-14 23:21:44 +020099 .wake = si_cs_process,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +0100100 .name = "STRM",
Willy Tarreauc5788912012-08-24 18:12:41 +0200101};
102
Willy Tarreaucff64112008-11-03 06:26:53 +0100103/*
104 * This function only has to be called once after a wakeup event in case of
105 * suspected timeout. It controls the stream interface timeouts and sets
106 * si->flags accordingly. It does NOT close anything, as this timeout may
107 * be used for any purpose. It returns 1 if the timeout fired, otherwise
108 * zero.
109 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100110int si_check_timeouts(struct stream_interface *si)
Willy Tarreaucff64112008-11-03 06:26:53 +0100111{
112 if (tick_is_expired(si->exp, now_ms)) {
113 si->flags |= SI_FL_EXP;
114 return 1;
115 }
116 return 0;
117}
118
Willy Tarreaufe3718a2008-11-30 18:14:12 +0100119/* to be called only when in SI_ST_DIS with SI_FL_ERR */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100120void si_report_error(struct stream_interface *si)
Willy Tarreaucff64112008-11-03 06:26:53 +0100121{
122 if (!si->err_type)
123 si->err_type = SI_ET_DATA_ERR;
124
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100125 si_oc(si)->flags |= CF_WRITE_ERROR;
126 si_ic(si)->flags |= CF_READ_ERROR;
Willy Tarreaucff64112008-11-03 06:26:53 +0100127}
128
129/*
Willy Tarreaudded32d2008-11-30 19:48:07 +0100130 * Returns a message to the client ; the connection is shut down for read,
131 * and the request is cleared so that no server connection can be initiated.
132 * The buffer is marked for read shutdown on the other side to protect the
133 * message, and the buffer write is enabled. The message is contained in a
Willy Tarreau148d0992010-01-10 10:21:21 +0100134 * "chunk". If it is null, then an empty message is used. The reply buffer does
135 * not need to be empty before this, and its contents will not be overwritten.
136 * The primary goal of this function is to return error messages to a client.
Willy Tarreaudded32d2008-11-30 19:48:07 +0100137 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100138void si_retnclose(struct stream_interface *si,
Willy Tarreau83061a82018-07-13 11:56:34 +0200139 const struct buffer *msg)
Willy Tarreaudded32d2008-11-30 19:48:07 +0100140{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100141 struct channel *ic = si_ic(si);
142 struct channel *oc = si_oc(si);
143
144 channel_auto_read(ic);
145 channel_abort(ic);
146 channel_auto_close(ic);
147 channel_erase(ic);
148 channel_truncate(oc);
Willy Tarreau798e1282010-12-12 13:06:00 +0100149
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200150 if (likely(msg && msg->data))
151 co_inject(oc, msg->area, msg->data);
Willy Tarreaudded32d2008-11-30 19:48:07 +0100152
Willy Tarreauafc8a222014-11-28 15:46:27 +0100153 oc->wex = tick_add_ifset(now_ms, oc->wto);
154 channel_auto_read(oc);
155 channel_auto_close(oc);
156 channel_shutr_now(oc);
Willy Tarreau5d881d02009-12-27 22:51:06 +0100157}
158
Willy Tarreau4a36b562012-08-06 19:31:45 +0200159/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200160 * This function performs a shutdown-read on a detached stream interface in a
161 * connected or init state (it does nothing for other states). It either shuts
162 * the read side or marks itself as closed. The buffer flags are updated to
163 * reflect the new state. If the stream interface has SI_FL_NOHALF, we also
164 * forward the close to the write side. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200165 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200166static void stream_int_shutr(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200167{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100168 struct channel *ic = si_ic(si);
169
Willy Tarreauabb5d422018-11-14 16:58:52 +0100170 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100171 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200172 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100173 ic->flags |= CF_SHUTR;
174 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200175
176 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200177 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200178
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100179 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200180 si->state = SI_ST_DIS;
181 si->exp = TICK_ETERNITY;
Willy Tarreaud8ccffe2010-09-07 16:16:50 +0200182 }
Willy Tarreau4a36b562012-08-06 19:31:45 +0200183 else if (si->flags & SI_FL_NOHALF) {
184 /* we want to immediately forward this close to the write side */
185 return stream_int_shutw(si);
186 }
Willy Tarreau0bd05ea2010-07-02 11:18:03 +0200187
Willy Tarreau4a36b562012-08-06 19:31:45 +0200188 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100189 if (!(si->flags & SI_FL_DONT_WAKE))
190 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200191}
192
Willy Tarreau4a36b562012-08-06 19:31:45 +0200193/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200194 * This function performs a shutdown-write on a detached stream interface in a
195 * connected or init state (it does nothing for other states). It either shuts
196 * the write side or marks itself as closed. The buffer flags are updated to
197 * reflect the new state. It does also close everything if the SI was marked as
198 * being in error state. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200199 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200200static void stream_int_shutw(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200201{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100202 struct channel *ic = si_ic(si);
203 struct channel *oc = si_oc(si);
204
205 oc->flags &= ~CF_SHUTW_NOW;
206 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200207 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100208 oc->flags |= CF_SHUTW;
209 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +0100210 si_done_get(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200211
Hongbo Longe39683c2017-03-10 18:41:51 +0100212 if (tick_isset(si->hcto)) {
213 ic->rto = si->hcto;
214 ic->rex = tick_add(now_ms, ic->rto);
215 }
216
Willy Tarreaufb90d942009-09-05 20:57:35 +0200217 switch (si->state) {
218 case SI_ST_EST:
Willy Tarreau4a36b562012-08-06 19:31:45 +0200219 /* we have to shut before closing, otherwise some short messages
220 * may never leave the system, especially when there are remaining
221 * unread data in the socket input buffer, or when nolinger is set.
222 * However, if SI_FL_NOLINGER is explicitly set, we know there is
223 * no risk so we close both sides immediately.
224 */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200225 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
Willy Tarreauafc8a222014-11-28 15:46:27 +0100226 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200227 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200228
229 /* fall through */
230 case SI_ST_CON:
231 case SI_ST_CER:
Willy Tarreau32d3ee92010-12-29 14:03:02 +0100232 case SI_ST_QUE:
233 case SI_ST_TAR:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200234 /* Note that none of these states may happen with applets */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200235 si->state = SI_ST_DIS;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200236 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +0100237 si->flags &= ~SI_FL_NOLINGER;
238 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100239 ic->flags |= CF_SHUTR;
240 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200241 si->exp = TICK_ETERNITY;
242 }
243
Willy Tarreau4a36b562012-08-06 19:31:45 +0200244 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100245 if (!(si->flags & SI_FL_DONT_WAKE))
246 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200247}
248
249/* default chk_rcv function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200250static void stream_int_chk_rcv(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200251{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100252 struct channel *ic = si_ic(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200253
Willy Tarreauafc8a222014-11-28 15:46:27 +0100254 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200255 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100256 si, si->state, ic->flags, si_oc(si)->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200257
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200258 if (ic->pipe) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200259 /* stop reading */
Willy Tarreaudb398432018-11-15 11:08:52 +0100260 si_rx_room_blk(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200261 }
262 else {
263 /* (re)start reading */
Olivier Houchard53216e72018-10-10 15:46:36 +0200264 tasklet_wakeup(si->wait_event.task);
Willy Tarreau07373b82014-11-28 12:08:47 +0100265 if (!(si->flags & SI_FL_DONT_WAKE))
266 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200267 }
268}
269
270/* default chk_snd function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200271static void stream_int_chk_snd(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200272{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100273 struct channel *oc = si_oc(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200274
Willy Tarreauafc8a222014-11-28 15:46:27 +0100275 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200276 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100277 si, si->state, si_ic(si)->flags, oc->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200278
Willy Tarreauafc8a222014-11-28 15:46:27 +0100279 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200280 return;
281
282 if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100283 channel_is_empty(oc)) /* called with nothing to send ! */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200284 return;
285
286 /* Otherwise there are remaining data to be sent in the buffer,
287 * so we tell the handler.
288 */
289 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100290 if (!tick_isset(oc->wex))
291 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200292
Willy Tarreau07373b82014-11-28 12:08:47 +0100293 if (!(si->flags & SI_FL_DONT_WAKE))
294 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200295}
296
Willy Tarreaua9ff5e62015-07-19 18:46:30 +0200297/* Register an applet to handle a stream_interface as a new appctx. The SI will
298 * wake it up everytime it is solicited. The appctx must be deleted by the task
299 * handler using si_release_endpoint(), possibly from within the function itself.
300 * It also pre-initializes the applet's context and returns it (or NULL in case
301 * it could not be allocated).
Willy Tarreaufb90d942009-09-05 20:57:35 +0200302 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100303struct appctx *si_register_handler(struct stream_interface *si, struct applet *app)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200304{
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100305 struct appctx *appctx;
306
Willy Tarreau07373b82014-11-28 12:08:47 +0100307 DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si_task(si));
Willy Tarreaufb90d942009-09-05 20:57:35 +0200308
Willy Tarreaua7513f52015-04-05 00:15:26 +0200309 appctx = si_alloc_appctx(si, app);
Willy Tarreaua69fc9f2014-12-22 19:34:00 +0100310 if (!appctx)
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100311 return NULL;
312
Willy Tarreau0cd3bd62018-11-06 18:46:37 +0100313 si_cant_get(si);
Willy Tarreau828824a2015-04-19 17:20:03 +0200314 appctx_wakeup(appctx);
Willy Tarreau1fbe1c92013-12-01 09:35:41 +0100315 return si_appctx(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200316}
317
Willy Tarreau2c6be842012-07-06 17:12:34 +0200318/* This callback is used to send a valid PROXY protocol line to a socket being
Willy Tarreauafad0e02012-08-09 14:45:22 +0200319 * established. It returns 0 if it fails in a fatal way or needs to poll to go
320 * further, otherwise it returns non-zero and removes itself from the connection's
Willy Tarreaua1a74742012-08-24 12:14:49 +0200321 * flags (the bit is provided in <flag> by the caller). It is designed to be
322 * called by the connection handler and relies on it to commit polling changes.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200323 * Note that it can emit a PROXY line by relying on the other end's address
324 * when the connection is attached to a stream interface, or by resolving the
325 * local address otherwise (also called a LOCAL line).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200326 */
327int conn_si_send_proxy(struct connection *conn, unsigned int flag)
328{
Willy Tarreau2c6be842012-07-06 17:12:34 +0200329 /* we might have been called just after an asynchronous shutw */
Willy Tarreaua1a74742012-08-24 12:14:49 +0200330 if (conn->flags & CO_FL_SOCK_WR_SH)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200331 goto out_error;
332
Willy Tarreaud02cdd22013-12-15 10:23:20 +0100333 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200334 goto out_error;
335
Willy Tarreau2c6be842012-07-06 17:12:34 +0200336 /* If we have a PROXY line to send, we'll use this to validate the
337 * connection, in which case the connection is validated only once
338 * we've sent the whole proxy line. Otherwise we use connect().
339 */
Tim Duesterhus36839dc2019-02-26 17:09:51 +0100340 if (conn->send_proxy_ofs) {
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100341 const struct conn_stream *cs;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200342 int ret;
343
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100344 cs = cs_get_first(conn);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200345 /* The target server expects a PROXY line to be sent first.
346 * If the send_proxy_ofs is negative, it corresponds to the
347 * offset to start sending from then end of the proxy string
348 * (which is recomputed every time since it's constant). If
349 * it is positive, it means we have to send from the start.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200350 * We can only send a "normal" PROXY line when the connection
351 * is attached to a stream interface. Otherwise we can only
352 * send a LOCAL line (eg: for use with health checks).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200353 */
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100354
355 if (cs && cs->data_cb == &si_conn_cb) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200356 struct stream_interface *si = cs->data;
357 struct conn_stream *remote_cs = objt_cs(si_opposite(si)->end);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200358 ret = make_proxy_line(trash.area, trash.size,
359 objt_server(conn->target),
360 remote_cs ? remote_cs->conn : NULL);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200361 }
362 else {
363 /* The target server expects a LOCAL line to be sent first. Retrieving
364 * local or remote addresses may fail until the connection is established.
365 */
366 conn_get_from_addr(conn);
367 if (!(conn->flags & CO_FL_ADDR_FROM_SET))
368 goto out_wait;
369
370 conn_get_to_addr(conn);
371 if (!(conn->flags & CO_FL_ADDR_TO_SET))
372 goto out_wait;
373
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200374 ret = make_proxy_line(trash.area, trash.size,
375 objt_server(conn->target), conn);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200376 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200377
Willy Tarreau2c6be842012-07-06 17:12:34 +0200378 if (!ret)
379 goto out_error;
380
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200381 if (conn->send_proxy_ofs > 0)
382 conn->send_proxy_ofs = -ret; /* first call */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200383
Willy Tarreaua1a74742012-08-24 12:14:49 +0200384 /* we have to send trash from (ret+sp for -sp bytes). If the
385 * data layer has a pending write, we'll also set MSG_MORE.
386 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200387 ret = conn_sock_send(conn,
388 trash.area + ret + conn->send_proxy_ofs,
389 -conn->send_proxy_ofs,
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200390 (conn->flags & CO_FL_XPRT_WR_ENA) ? MSG_MORE : 0);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200391
Willy Tarreau0a03c0f2015-03-13 00:05:28 +0100392 if (ret < 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200393 goto out_error;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200394
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200395 conn->send_proxy_ofs += ret; /* becomes zero once complete */
396 if (conn->send_proxy_ofs != 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200397 goto out_wait;
398
399 /* OK we've sent the whole line, we're connected */
400 }
401
Willy Tarreaua1a74742012-08-24 12:14:49 +0200402 /* The connection is ready now, simply return and let the connection
403 * handler notify upper layers if needed.
Willy Tarreau2c6be842012-07-06 17:12:34 +0200404 */
405 if (conn->flags & CO_FL_WAIT_L4_CONN)
406 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200407 conn->flags &= ~flag;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200408 return 1;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200409
410 out_error:
Willy Tarreauafad0e02012-08-09 14:45:22 +0200411 /* Write error on the file descriptor */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200412 conn->flags |= CO_FL_ERROR;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200413 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200414
415 out_wait:
Willy Tarreaua1a74742012-08-24 12:14:49 +0200416 __conn_sock_stop_recv(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200417 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200418}
419
Willy Tarreau27375622013-12-17 00:00:28 +0100420
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100421/* This function is the equivalent to si_update() except that it's
Willy Tarreau615f28b2015-09-23 18:40:09 +0200422 * designed to be called from outside the stream handlers, typically the lower
423 * layers (applets, connections) after I/O completion. After updating the stream
424 * interface and timeouts, it will try to forward what can be forwarded, then to
425 * wake the associated task up if an important event requires special handling.
Willy Tarreaud0f5bbc2018-11-14 11:10:26 +0100426 * It may update SI_FL_WAIT_DATA and/or SI_FL_RXBLK_ROOM, that the callers are
Willy Tarreau0dfccb22018-10-25 13:55:20 +0200427 * encouraged to watch to take appropriate action.
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100428 * It should not be called from within the stream itself, si_update()
Willy Tarreau615f28b2015-09-23 18:40:09 +0200429 * is designed for this.
430 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100431static void stream_int_notify(struct stream_interface *si)
Willy Tarreau615f28b2015-09-23 18:40:09 +0200432{
433 struct channel *ic = si_ic(si);
434 struct channel *oc = si_oc(si);
Willy Tarreau47baeb82018-11-15 07:46:57 +0100435 struct stream_interface *sio = si_opposite(si);
Christopher Fauletd7607de2019-01-03 16:24:54 +0100436 struct task *task = si_task(si);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200437
438 /* process consumer side */
439 if (channel_is_empty(oc)) {
Olivier Houcharde9bed532017-11-16 17:49:25 +0100440 struct connection *conn = objt_cs(si->end) ? objt_cs(si->end)->conn : NULL;
441
Willy Tarreau615f28b2015-09-23 18:40:09 +0200442 if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) &&
Olivier Houcharde9bed532017-11-16 17:49:25 +0100443 (si->state == SI_ST_EST) && (!conn || !(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS))))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200444 si_shutw(si);
445 oc->wex = TICK_ETERNITY;
446 }
447
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100448 /* indicate that we may be waiting for data from the output channel or
449 * we're about to close and can't expect more data if SHUTW_NOW is there.
450 */
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200451 if (!(oc->flags & (CF_SHUTW|CF_SHUTW_NOW)))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200452 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100453 else if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)
454 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200455
456 /* update OC timeouts and wake the other side up if it's waiting for room */
457 if (oc->flags & CF_WRITE_ACTIVITY) {
458 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
459 !channel_is_empty(oc))
460 if (tick_isset(oc->wex))
461 oc->wex = tick_add_ifset(now_ms, oc->wto);
462
463 if (!(si->flags & SI_FL_INDEP_STR))
464 if (tick_isset(ic->rex))
465 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreauf26c26c2018-11-12 16:11:08 +0100466 }
Willy Tarreau615f28b2015-09-23 18:40:09 +0200467
Willy Tarreau47baeb82018-11-15 07:46:57 +0100468 if ((sio->flags & SI_FL_RXBLK_ROOM) &&
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100469 ((oc->flags & CF_WRITE_PARTIAL) || channel_is_empty(oc)))
Willy Tarreaudb398432018-11-15 11:08:52 +0100470 si_rx_room_rdy(sio);
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100471
472 if (oc->flags & CF_DONT_READ)
473 si_rx_chan_blk(sio);
474 else
475 si_rx_chan_rdy(sio);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200476
477 /* Notify the other side when we've injected data into the IC that
478 * needs to be forwarded. We can do fast-forwarding as soon as there
479 * are output data, but we avoid doing this if some of the data are
480 * not yet scheduled for being forwarded, because it is very likely
481 * that it will be done again immediately afterwards once the following
Willy Tarreaud0f5bbc2018-11-14 11:10:26 +0100482 * data are parsed (eg: HTTP chunking). We only SI_FL_RXBLK_ROOM once
Willy Tarreau615f28b2015-09-23 18:40:09 +0200483 * we've emptied *some* of the output buffer, and not just when there
484 * is available room, because applets are often forced to stop before
485 * the buffer is full. We must not stop based on input data alone because
486 * an HTTP parser might need more data to complete the parsing.
487 */
488 if (!channel_is_empty(ic) &&
Willy Tarreau47baeb82018-11-15 07:46:57 +0100489 (sio->flags & SI_FL_WAIT_DATA) &&
Willy Tarreau89b6a2b2018-11-18 15:46:10 +0100490 (!(ic->flags & CF_EXPECT_MORE) || c_full(ic) || ci_data(ic) == 0 || ic->pipe)) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200491 int new_len, last_len;
492
Willy Tarreau77e478c2018-06-19 07:03:14 +0200493 last_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200494 if (ic->pipe)
495 last_len += ic->pipe->data;
496
Willy Tarreau47baeb82018-11-15 07:46:57 +0100497 si_chk_snd(sio);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200498
Willy Tarreau77e478c2018-06-19 07:03:14 +0200499 new_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200500 if (ic->pipe)
501 new_len += ic->pipe->data;
502
503 /* check if the consumer has freed some space either in the
504 * buffer or in the pipe.
505 */
Willy Tarreau47baeb82018-11-15 07:46:57 +0100506 if (new_len < last_len)
Willy Tarreaudb398432018-11-15 11:08:52 +0100507 si_rx_room_rdy(si);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200508 }
509
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100510 if (!(ic->flags & CF_DONT_READ))
511 si_rx_chan_rdy(si);
512
Willy Tarreau47baeb82018-11-15 07:46:57 +0100513 si_chk_rcv(si);
514 si_chk_rcv(sio);
515
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100516 if (si_rx_blocked(si)) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200517 ic->rex = TICK_ETERNITY;
518 }
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100519 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL)) == CF_READ_PARTIAL) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200520 /* we must re-enable reading if si_chk_snd() has freed some space */
521 if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex))
522 ic->rex = tick_add_ifset(now_ms, ic->rto);
523 }
524
525 /* wake the task up only when needed */
526 if (/* changes on the production side */
527 (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
Willy Tarreaub69f1712018-11-08 14:32:16 +0100528 (si->state != SI_ST_EST && si->state != SI_ST_CON) ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200529 (si->flags & SI_FL_ERR) ||
530 ((ic->flags & CF_READ_PARTIAL) &&
Christopher Faulet297d3e22019-03-22 14:16:14 +0100531 ((ic->flags & CF_EOI) || !ic->to_forward || sio->state != SI_ST_EST)) ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200532
533 /* changes on the consumption side */
534 (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
Willy Tarreauede3d882018-10-24 17:17:56 +0200535 ((oc->flags & CF_WRITE_ACTIVITY) &&
Willy Tarreau615f28b2015-09-23 18:40:09 +0200536 ((oc->flags & CF_SHUTW) ||
Willy Tarreau78f5ff82018-12-19 11:00:00 +0100537 (((oc->flags & CF_WAKE_WRITE) ||
538 !(oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW|CF_SHUTW))) &&
Willy Tarreau47baeb82018-11-15 07:46:57 +0100539 (sio->state != SI_ST_EST ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200540 (channel_is_empty(oc) && !oc->to_forward)))))) {
Christopher Fauletd7607de2019-01-03 16:24:54 +0100541 task_wakeup(task, TASK_WOKEN_IO);
542 }
543 else {
544 /* Update expiration date for the task and requeue it */
545 task->expire = tick_first((tick_is_expired(task->expire, now_ms) ? 0 : task->expire),
546 tick_first(tick_first(ic->rex, ic->wex),
547 tick_first(oc->rex, oc->wex)));
548 task_queue(task);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200549 }
550 if (ic->flags & CF_READ_ACTIVITY)
551 ic->flags &= ~CF_READ_DONTWAIT;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200552}
553
554
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200555/* Called by I/O handlers after completion.. It propagates
Willy Tarreau651e1822015-09-23 20:06:13 +0200556 * connection flags to the stream interface, updates the stream (which may or
557 * may not take this opportunity to try to forward data), then update the
558 * connection's polling based on the channels and stream interface's final
559 * states. The function always returns 0.
Willy Tarreau100c4672012-08-20 12:06:26 +0200560 */
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200561static int si_cs_process(struct conn_stream *cs)
Willy Tarreaufd31e532012-07-23 18:24:25 +0200562{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200563 struct connection *conn = cs->conn;
564 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100565 struct channel *ic = si_ic(si);
566 struct channel *oc = si_oc(si);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200567
Olivier Houchardc7ffa912018-08-28 19:37:41 +0200568 /* If we have data to send, try it now */
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100569 if (!channel_is_empty(oc) && !(si->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau908d26f2018-10-25 14:02:47 +0200570 si_cs_send(cs);
571
Willy Tarreau651e1822015-09-23 20:06:13 +0200572 /* First step, report to the stream-int what was detected at the
573 * connection layer : errors and connection establishment.
574 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200575 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreau3c55ec22012-07-23 19:19:51 +0200576 si->flags |= SI_FL_ERR;
577
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200578 /* If we had early data, and the handshake ended, then
579 * we can remove the flag, and attempt to wake the task up,
580 * in the event there's an analyser waiting for the end of
581 * the handshake.
582 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +0100583 if (!(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS)) &&
584 (cs->flags & CS_FL_WAIT_FOR_HS)) {
585 cs->flags &= ~CS_FL_WAIT_FOR_HS;
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200586 task_wakeup(si_task(si), TASK_WOKEN_MSG);
587 }
588
Willy Tarreau52821e22017-03-18 17:11:37 +0100589 if ((si->state < SI_ST_EST) &&
590 (conn->flags & (CO_FL_CONNECTED | CO_FL_HANDSHAKE)) == CO_FL_CONNECTED) {
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200591 si->exp = TICK_ETERNITY;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100592 oc->flags |= CF_WRITE_NULL;
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200593 }
594
Christopher Faulet297d3e22019-03-22 14:16:14 +0100595 /* Report EOI on the channel if it was reached from the mux point of
596 * view. */
597 if ((cs->flags & CS_FL_EOI) && !(ic->flags & CF_EOI))
598 ic->flags |= CF_EOI;
Christopher Faulet203b2b02019-03-08 09:23:46 +0100599
Willy Tarreau651e1822015-09-23 20:06:13 +0200600 /* Second step : update the stream-int and channels, try to forward any
601 * pending data, then possibly wake the stream up based on the new
602 * stream-int status.
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200603 */
Willy Tarreau651e1822015-09-23 20:06:13 +0200604 stream_int_notify(si);
Christopher Fauleta73e59b2016-12-09 17:30:18 +0100605 channel_release_buffer(ic, &(si_strm(si)->buffer_wait));
Willy Tarreauea3cc482015-09-23 19:37:00 +0200606
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200607 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200608}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200609
Willy Tarreau5368d802012-08-21 18:22:06 +0200610/*
611 * This function is called to send buffer data to a stream socket.
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200612 * It calls the mux layer's snd_buf function. It relies on the
Godbach4f489902013-12-04 17:24:06 +0800613 * caller to commit polling changes. The caller should check conn->flags
614 * for errors.
Willy Tarreau5368d802012-08-21 18:22:06 +0200615 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +0200616int si_cs_send(struct conn_stream *cs)
Willy Tarreau5368d802012-08-21 18:22:06 +0200617{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200618 struct connection *conn = cs->conn;
619 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100620 struct channel *oc = si_oc(si);
Willy Tarreau5368d802012-08-21 18:22:06 +0200621 int ret;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200622 int did_send = 0;
623
624 /* We're already waiting to be able to send, give up */
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100625 if (si->wait_event.events & SUB_RETRY_SEND)
Olivier Houchardf6535282018-08-31 17:29:12 +0200626 return 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200627
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100628 if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
629 si->flags |= SI_FL_ERR;
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200630 return 1;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100631 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200632
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200633 /* we might have been called just after an asynchronous shutw */
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100634 if (conn->flags & CO_FL_SOCK_WR_SH || oc->flags & CF_SHUTW)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200635 return 1;
Willy Tarreau5368d802012-08-21 18:22:06 +0200636
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200637 if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) {
638 ret = conn->mux->snd_pipe(cs, oc->pipe);
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200639 if (ret > 0) {
Willy Tarreauede3d882018-10-24 17:17:56 +0200640 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200641 did_send = 1;
642 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200643
Willy Tarreauafc8a222014-11-28 15:46:27 +0100644 if (!oc->pipe->data) {
645 put_pipe(oc->pipe);
646 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200647 }
648
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100649 if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
650 si->flags |= SI_FL_ERR;
Christopher Faulet5ed7aab2018-11-19 22:02:07 +0100651 return 1;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100652 }
Christopher Faulet3f76f4c2018-11-20 10:21:08 +0100653
654 if (oc->pipe)
655 goto end;
Willy Tarreau5368d802012-08-21 18:22:06 +0200656 }
657
658 /* At this point, the pipe is empty, but we may still have data pending
659 * in the normal buffer.
660 */
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100661 if (co_data(oc)) {
662 /* when we're here, we already know that there is no spliced
663 * data left, and that there are sendable buffered data.
664 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200665
Willy Tarreau5368d802012-08-21 18:22:06 +0200666 /* check if we want to inform the kernel that we're interested in
667 * sending more data after this call. We want this if :
668 * - we're about to close after this last send and want to merge
669 * the ongoing FIN with the last segment.
670 * - we know we can't send everything at once and must get back
671 * here because of unaligned data
672 * - there is still a finite amount of data to forward
673 * The test is arranged so that the most common case does only 2
674 * tests.
675 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100676 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200677
Willy Tarreauafc8a222014-11-28 15:46:27 +0100678 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
679 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
Willy Tarreau4ac49282017-10-17 16:33:46 +0200680 (oc->flags & CF_EXPECT_MORE))) ||
Willy Tarreauecd2e152017-11-07 15:07:25 +0100681 ((oc->flags & CF_ISRESP) &&
682 ((oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW)) == (CF_AUTO_CLOSE|CF_SHUTW_NOW))))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100683 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200684
Willy Tarreauafc8a222014-11-28 15:46:27 +0100685 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100686 send_flag |= CO_SFL_STREAMER;
687
Olivier Houcharded0f2072018-08-16 15:41:52 +0200688 ret = cs->conn->mux->snd_buf(cs, &oc->buf, co_data(oc), send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800689 if (ret > 0) {
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200690 did_send = 1;
Willy Tarreauede3d882018-10-24 17:17:56 +0200691 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Willy Tarreau5368d802012-08-21 18:22:06 +0200692
Willy Tarreau77e478c2018-06-19 07:03:14 +0200693 co_set_data(oc, co_data(oc) - ret);
Willy Tarreaudeccd112018-06-14 18:38:55 +0200694 c_realign_if_empty(oc);
695
696 if (!co_data(oc)) {
Godbache68e02d2013-10-11 15:48:29 +0800697 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100698 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800699 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200700
Godbache68e02d2013-10-11 15:48:29 +0800701 /* if some data remain in the buffer, it's only because the
702 * system buffers are full, we will try next time.
703 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200704 }
Christopher Faulete4acd5e2018-11-20 09:34:35 +0100705
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100706 if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
707 si->flags |= SI_FL_ERR;
Christopher Faulete4acd5e2018-11-20 09:34:35 +0100708 return 1;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100709 }
Godbache68e02d2013-10-11 15:48:29 +0800710 }
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100711
Willy Tarreauf6975aa2018-11-15 14:33:05 +0100712 end:
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200713 /* 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 +0100714 if (!channel_is_empty(oc))
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100715 conn->mux->subscribe(cs, SUB_RETRY_SEND, &si->wait_event);
Olivier Houchardf6535282018-08-31 17:29:12 +0200716 return did_send;
Willy Tarreau5368d802012-08-21 18:22:06 +0200717}
718
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100719/* This is the ->process() function for any stream-interface's wait_event task.
720 * It's assigned during the stream-interface's initialization, for any type of
721 * stream interface. Thus it is always safe to perform a tasklet_wakeup() on a
722 * stream interface, as the presence of the CS is checked there.
723 */
Olivier Houchard91894cb2018-08-02 18:06:28 +0200724struct task *si_cs_io_cb(struct task *t, void *ctx, unsigned short state)
725{
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200726 struct stream_interface *si = ctx;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200727 struct conn_stream *cs = objt_cs(si->end);
Olivier Houchardf6535282018-08-31 17:29:12 +0200728 int ret = 0;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200729
730 if (!cs)
731 return NULL;
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100732
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100733 if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchardf6535282018-08-31 17:29:12 +0200734 ret = si_cs_send(cs);
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100735 if (!(si->wait_event.events & SUB_RETRY_RECV))
Olivier Houchardf6535282018-08-31 17:29:12 +0200736 ret |= si_cs_recv(cs);
737 if (ret != 0)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200738 si_cs_process(cs);
Olivier Houchardf6535282018-08-31 17:29:12 +0200739
Olivier Houchard91894cb2018-08-02 18:06:28 +0200740 return (NULL);
741}
742
Willy Tarreau25f13102015-09-24 11:32:22 +0200743/* This function is designed to be called from within the stream handler to
744 * update the channels' expiration timers and the stream interface's flags
745 * based on the channels' flags. It needs to be called only once after the
746 * channels' flags have settled down, and before they are cleared, though it
747 * doesn't harm to call it as often as desired (it just slightly hurts
748 * performance). It must not be called from outside of the stream handler,
749 * as what it does will be used to compute the stream task's expiration.
750 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100751void si_update(struct stream_interface *si)
Willy Tarreau25f13102015-09-24 11:32:22 +0200752{
753 struct channel *ic = si_ic(si);
754 struct channel *oc = si_oc(si);
755
756 if (!(ic->flags & CF_SHUTR)) {
757 /* Read not closed, update FD status and timeout for reads */
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100758 if (ic->flags & CF_DONT_READ)
759 si_rx_chan_blk(si);
760 else
761 si_rx_chan_rdy(si);
762
763 if (!channel_is_empty(ic)) {
Willy Tarreauf26c26c2018-11-12 16:11:08 +0100764 /* stop reading, imposed by channel's policy or contents */
Willy Tarreaudb398432018-11-15 11:08:52 +0100765 si_rx_room_blk(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200766 }
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200767 else {
Willy Tarreau25f13102015-09-24 11:32:22 +0200768 /* (re)start reading and update timeout. Note: we don't recompute the timeout
769 * everytime we get here, otherwise it would risk never to expire. We only
770 * update it if is was not yet set. The stream socket handler will already
771 * have updated it if there has been a completed I/O.
772 */
Willy Tarreaudb398432018-11-15 11:08:52 +0100773 si_rx_room_rdy(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200774 }
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100775 if (si->flags & SI_FL_RXBLK_ANY & ~SI_FL_RX_WAIT_EP)
776 ic->rex = TICK_ETERNITY;
777 else if (!(ic->flags & CF_READ_NOEXP) && !tick_isset(ic->rex))
778 ic->rex = tick_add_ifset(now_ms, ic->rto);
779
Willy Tarreau47baeb82018-11-15 07:46:57 +0100780 si_chk_rcv(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200781 }
Willy Tarreauabb5d422018-11-14 16:58:52 +0100782 else
783 si_rx_shut_blk(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200784
785 if (!(oc->flags & CF_SHUTW)) {
786 /* Write not closed, update FD status and timeout for writes */
787 if (channel_is_empty(oc)) {
788 /* stop writing */
789 if (!(si->flags & SI_FL_WAIT_DATA)) {
790 if ((oc->flags & CF_SHUTW_NOW) == 0)
791 si->flags |= SI_FL_WAIT_DATA;
792 oc->wex = TICK_ETERNITY;
793 }
794 }
795 else {
796 /* (re)start writing and update timeout. Note: we don't recompute the timeout
797 * everytime we get here, otherwise it would risk never to expire. We only
798 * update it if is was not yet set. The stream socket handler will already
799 * have updated it if there has been a completed I/O.
800 */
801 si->flags &= ~SI_FL_WAIT_DATA;
802 if (!tick_isset(oc->wex)) {
803 oc->wex = tick_add_ifset(now_ms, oc->wto);
804 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
805 /* Note: depending on the protocol, we don't know if we're waiting
806 * for incoming data or not. So in order to prevent the socket from
807 * expiring read timeouts during writes, we refresh the read timeout,
808 * except if it was already infinite or if we have explicitly setup
809 * independent streams.
810 */
811 ic->rex = tick_add_ifset(now_ms, ic->rto);
812 }
813 }
814 }
815 }
816}
817
Willy Tarreaud14844a2018-11-08 18:15:29 +0100818/* updates both stream ints of a same stream at once */
819/* Updates at once the channel flags, and timers of both stream interfaces of a
820 * same stream, to complete the work after the analysers, then updates the data
821 * layer below. This will ensure that any synchronous update performed at the
822 * data layer will be reflected in the channel flags and/or stream-interface.
823 */
824void si_update_both(struct stream_interface *si_f, struct stream_interface *si_b)
825{
826 struct channel *req = si_ic(si_f);
827 struct channel *res = si_oc(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100828 struct conn_stream *cs;
Willy Tarreaud14844a2018-11-08 18:15:29 +0100829
830 req->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
831 res->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
832
Willy Tarreaud14844a2018-11-08 18:15:29 +0100833 si_f->prev_state = si_f->state;
834 si_b->prev_state = si_b->state;
835
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100836 /* front stream-int */
837 cs = objt_cs(si_f->end);
838 if (cs &&
839 si_f->state == SI_ST_EST &&
840 !(res->flags & CF_SHUTW) && /* Write not closed */
841 !channel_is_empty(res) &&
842 !(cs->flags & CS_FL_ERROR) &&
843 !(cs->conn->flags & CO_FL_ERROR)) {
844 if (si_cs_send(cs))
Willy Tarreaudb398432018-11-15 11:08:52 +0100845 si_rx_room_rdy(si_b);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100846 }
847
848 /* back stream-int */
849 cs = objt_cs(si_b->end);
850 if (cs &&
851 (si_b->state == SI_ST_EST || si_b->state == SI_ST_CON) &&
852 !(req->flags & CF_SHUTW) && /* Write not closed */
853 !channel_is_empty(req) &&
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100854 !(cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) &&
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100855 !(cs->conn->flags & CO_FL_ERROR)) {
856 if (si_cs_send(cs))
Willy Tarreaudb398432018-11-15 11:08:52 +0100857 si_rx_room_rdy(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100858 }
859
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100860 /* let's recompute both sides states */
861 if (si_f->state == SI_ST_EST)
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100862 si_update(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100863
864 if (si_b->state == SI_ST_EST)
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100865 si_update(si_b);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100866
867 /* stream ints are processed outside of process_stream() and must be
868 * handled at the latest moment.
869 */
870 if (obj_type(si_f->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +0100871 ((si_rx_endp_ready(si_f) && !si_rx_blocked(si_f)) ||
872 (si_tx_endp_ready(si_f) && !si_tx_blocked(si_f))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100873 appctx_wakeup(si_appctx(si_f));
Willy Tarreaud14844a2018-11-08 18:15:29 +0100874
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100875 if (obj_type(si_b->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +0100876 ((si_rx_endp_ready(si_b) && !si_rx_blocked(si_b)) ||
877 (si_tx_endp_ready(si_b) && !si_tx_blocked(si_b))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100878 appctx_wakeup(si_appctx(si_b));
Willy Tarreaud14844a2018-11-08 18:15:29 +0100879}
880
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200881/*
882 * This function performs a shutdown-read on a stream interface attached to
883 * a connection in a connected or init state (it does nothing for other
884 * states). It either shuts the read side or marks itself as closed. The buffer
885 * flags are updated to reflect the new state. If the stream interface has
886 * SI_FL_NOHALF, we also forward the close to the write side. If a control
887 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +0200888 * descriptors are then shutdown or closed accordingly. The function
889 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200890 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200891static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200892{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200893 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100894 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200895
Willy Tarreauabb5d422018-11-14 16:58:52 +0100896 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100897 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200898 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100899 ic->flags |= CF_SHUTR;
900 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200901
902 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200903 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200904
Willy Tarreau51d0a7e2019-01-31 19:09:59 +0100905 if (si->flags & SI_FL_KILL_CONN)
906 cs->flags |= CS_FL_KILL_CONN;
907
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100908 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaua553ae92017-10-05 18:52:17 +0200909 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200910 si->state = SI_ST_DIS;
911 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200912 }
913 else if (si->flags & SI_FL_NOHALF) {
914 /* we want to immediately forward this close to the write side */
915 return stream_int_shutw_conn(si);
916 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200917}
918
919/*
920 * This function performs a shutdown-write on a stream interface attached to
921 * a connection in a connected or init state (it does nothing for other
922 * states). It either shuts the write side or marks itself as closed. The
923 * buffer flags are updated to reflect the new state. It does also close
924 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +0100925 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200926 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200927static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200928{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200929 struct conn_stream *cs = __objt_cs(si->end);
930 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100931 struct channel *ic = si_ic(si);
932 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200933
Willy Tarreauafc8a222014-11-28 15:46:27 +0100934 oc->flags &= ~CF_SHUTW_NOW;
935 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200936 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100937 oc->flags |= CF_SHUTW;
938 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +0100939 si_done_get(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200940
Hongbo Longe39683c2017-03-10 18:41:51 +0100941 if (tick_isset(si->hcto)) {
942 ic->rto = si->hcto;
943 ic->rex = tick_add(now_ms, ic->rto);
944 }
945
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200946 switch (si->state) {
947 case SI_ST_EST:
948 /* we have to shut before closing, otherwise some short messages
949 * may never leave the system, especially when there are remaining
950 * unread data in the socket input buffer, or when nolinger is set.
951 * However, if SI_FL_NOLINGER is explicitly set, we know there is
952 * no risk so we close both sides immediately.
953 */
Willy Tarreau51d0a7e2019-01-31 19:09:59 +0100954 if (si->flags & SI_FL_KILL_CONN)
955 cs->flags |= CS_FL_KILL_CONN;
956
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200957 if (si->flags & SI_FL_ERR) {
958 /* quick close, the socket is alredy shut anyway */
959 }
960 else if (si->flags & SI_FL_NOLINGER) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200961 /* unclean data-layer shutdown, typically an aborted request
962 * or a forwarded shutdown from a client to a server due to
963 * option abortonclose. No need for the TLS layer to try to
964 * emit a shutdown message.
965 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200966 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200967 }
968 else {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200969 /* clean data-layer shutdown. This only happens on the
970 * frontend side, or on the backend side when forwarding
971 * a client close in TCP mode or in HTTP TUNNEL mode
972 * while option abortonclose is set. We want the TLS
973 * layer to try to signal it to the peer before we close.
974 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200975 cs_shutw(cs, CS_SHW_NORMAL);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200976
Willy Tarreaua553ae92017-10-05 18:52:17 +0200977 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
978 /* OK just a shutw, but we want the caller
979 * to disable polling on this FD if exists.
980 */
981 conn_cond_update_polling(conn);
982 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200983 }
984 }
985
986 /* fall through */
987 case SI_ST_CON:
988 /* we may have to close a pending connection, and mark the
989 * response buffer as shutr
990 */
Willy Tarreau51d0a7e2019-01-31 19:09:59 +0100991 if (si->flags & SI_FL_KILL_CONN)
992 cs->flags |= CS_FL_KILL_CONN;
Willy Tarreaua553ae92017-10-05 18:52:17 +0200993 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200994 /* fall through */
995 case SI_ST_CER:
996 case SI_ST_QUE:
997 case SI_ST_TAR:
998 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +0200999 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001000 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +01001001 si->flags &= ~SI_FL_NOLINGER;
1002 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001003 ic->flags |= CF_SHUTR;
1004 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001005 si->exp = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +02001006 }
1007}
1008
Willy Tarreau46a8d922012-08-20 12:38:36 +02001009/* This function is used for inter-stream-interface calls. It is called by the
1010 * consumer to inform the producer side that it may be interested in checking
1011 * for free space in the buffer. Note that it intentionally does not update
1012 * timeouts, so that we can still check them later at wake-up. This function is
1013 * dedicated to connection-based stream interfaces.
1014 */
Willy Tarreauc5788912012-08-24 18:12:41 +02001015static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +02001016{
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001017 /* (re)start reading */
Olivier Houchardb2fc04e2019-04-11 13:56:26 +02001018 if (si->state == SI_ST_CON || si->state == SI_ST_EST)
1019 tasklet_wakeup(si->wait_event.task);
Willy Tarreau46a8d922012-08-20 12:38:36 +02001020}
1021
1022
Willy Tarreaude5722c2012-08-20 15:01:10 +02001023/* This function is used for inter-stream-interface calls. It is called by the
1024 * producer to inform the consumer side that it may be interested in checking
1025 * for data in the buffer. Note that it intentionally does not update timeouts,
1026 * so that we can still check them later at wake-up.
1027 */
Willy Tarreauc5788912012-08-24 18:12:41 +02001028static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001029{
Willy Tarreauafc8a222014-11-28 15:46:27 +01001030 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001031 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001032
Olivier Houchardb2fc04e2019-04-11 13:56:26 +02001033 if (unlikely((si->state != SI_ST_CON && si->state != SI_ST_EST) ||
1034 (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +02001035 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001036
Willy Tarreauafc8a222014-11-28 15:46:27 +01001037 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001038 return;
1039
Willy Tarreauafc8a222014-11-28 15:46:27 +01001040 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +01001041 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001042 return;
1043
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001044 if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchard31f04e42018-10-22 16:01:09 +02001045 si_cs_send(cs);
Willy Tarreau33a09a52018-10-25 13:49:49 +02001046
Willy Tarreaubddf7fc2018-12-19 17:17:10 +01001047 if (cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING) || cs->conn->flags & CO_FL_ERROR) {
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001048 /* Write error on the file descriptor */
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001049 si->flags |= SI_FL_ERR;
1050 goto out_wakeup;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001051 }
1052
1053 /* OK, so now we know that some data might have been sent, and that we may
1054 * have to poll first. We have to do that too if the buffer is not empty.
1055 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001056 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001057 /* the connection is established but we can't write. Either the
1058 * buffer is empty, or we just refrain from sending because the
1059 * ->o limit was reached. Maybe we just wrote the last
1060 * chunk and need to close.
1061 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001062 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001063 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreaude5722c2012-08-20 15:01:10 +02001064 (si->state == SI_ST_EST)) {
1065 si_shutw(si);
1066 goto out_wakeup;
1067 }
1068
Willy Tarreauafc8a222014-11-28 15:46:27 +01001069 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001070 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001071 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001072 }
1073 else {
1074 /* Otherwise there are remaining data to be sent in the buffer,
1075 * which means we have to poll before doing so.
1076 */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001077 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001078 if (!tick_isset(oc->wex))
1079 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001080 }
1081
Willy Tarreauafc8a222014-11-28 15:46:27 +01001082 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1083 struct channel *ic = si_ic(si);
1084
Willy Tarreaude5722c2012-08-20 15:01:10 +02001085 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001086 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1087 !channel_is_empty(oc))
1088 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001089
Willy Tarreauafc8a222014-11-28 15:46:27 +01001090 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001091 /* Note: to prevent the client from expiring read timeouts
1092 * during writes, we refresh it. We only do this if the
1093 * interface is not configured for "independent streams",
1094 * because for some applications it's better not to do this,
1095 * for instance when continuously exchanging small amounts
1096 * of data which can full the socket buffers long before a
1097 * write timeout is detected.
1098 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001099 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001100 }
1101 }
1102
1103 /* in case of special condition (error, shutdown, end of write...), we
1104 * have to notify the task.
1105 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001106 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1107 ((oc->flags & CF_WAKE_WRITE) &&
1108 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreaue6300be2014-01-25 02:33:21 +01001109 si->state != SI_ST_EST)))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001110 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001111 if (!(si->flags & SI_FL_DONT_WAKE))
1112 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001113 }
1114}
1115
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001116/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001117 * This is the callback which is called by the connection layer to receive data
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001118 * into the buffer from the connection. It iterates over the mux layer's
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001119 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001120 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +02001121int si_cs_recv(struct conn_stream *cs)
Willy Tarreauce323de2012-08-20 21:41:06 +02001122{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001123 struct connection *conn = cs->conn;
1124 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001125 struct channel *ic = si_ic(si);
Olivier Houchardf6535282018-08-31 17:29:12 +02001126 int ret, max, cur_read = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001127 int read_poll = MAX_READ_POLL_LOOPS;
Christopher Fauletc6618d62018-10-11 15:56:04 +02001128 int flags = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001129
Olivier Houchardf6535282018-08-31 17:29:12 +02001130 /* If another call to si_cs_recv() failed, and we subscribed to
1131 * recv events already, give up now.
1132 */
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001133 if (si->wait_event.events & SUB_RETRY_RECV)
Olivier Houchardf6535282018-08-31 17:29:12 +02001134 return 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001135
Willy Tarreauce323de2012-08-20 21:41:06 +02001136 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001137 if (ic->flags & CF_SHUTR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001138 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001139
Willy Tarreau54e917c2017-08-30 07:35:35 +02001140 /* stop here if we reached the end of data */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001141 if (cs->flags & CS_FL_EOS)
Willy Tarreau54e917c2017-08-30 07:35:35 +02001142 goto out_shutdown_r;
1143
Christopher Fauletf061e422018-12-07 14:51:20 +01001144 /* stop immediately on errors. Note that we DON'T want to stop on
1145 * POLL_ERR, as the poller might report a write error while there
1146 * are still data available in the recv buffer. This typically
1147 * happens when we send too large a request to a backend server
1148 * which rejects it before reading it all.
1149 */
1150 if (!(cs->flags & CS_FL_RCV_MORE)) {
1151 if (!conn_xprt_ready(conn))
1152 return 0;
1153 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
1154 return 1; // We want to make sure si_cs_wake() is called, so that process_strema is woken up, on failure
1155 }
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001156
Willy Tarreau7ab99a32018-12-18 09:15:43 +01001157 /* prepare to detect if the mux needs more room */
1158 cs->flags &= ~CS_FL_WANT_ROOM;
1159
Willy Tarreau77e478c2018-06-19 07:03:14 +02001160 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !co_data(ic) &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001161 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001162 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001163 /* The buffer was empty and nothing was transferred for more
1164 * than one second. This was caused by a pause and not by
1165 * congestion. Reset any streaming mode to reduce latency.
1166 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001167 ic->xfer_small = 0;
1168 ic->xfer_large = 0;
1169 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001170 }
1171
Willy Tarreau96199b12012-08-24 00:46:52 +02001172 /* First, let's see if we may splice data across the channel without
1173 * using a buffer.
1174 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001175 if (conn->xprt->rcv_pipe && conn->mux->rcv_pipe &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001176 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1177 ic->flags & CF_KERN_SPLICING) {
Willy Tarreaud760eec2018-07-10 09:50:25 +02001178 if (c_data(ic)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001179 /* We're embarrassed, there are already data pending in
1180 * the buffer and we don't want to have them at two
1181 * locations at a time. Let's indicate we need some
1182 * place and ask the consumer to hurry.
1183 */
Christopher Fauletc6618d62018-10-11 15:56:04 +02001184 flags |= CO_RFL_BUF_FLUSH;
Willy Tarreau96199b12012-08-24 00:46:52 +02001185 goto abort_splice;
1186 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001187
Willy Tarreauafc8a222014-11-28 15:46:27 +01001188 if (unlikely(ic->pipe == NULL)) {
1189 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1190 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001191 goto abort_splice;
1192 }
1193 }
1194
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001195 ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001196 if (ret < 0) {
1197 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001198 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001199 goto abort_splice;
1200 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001201
Willy Tarreau96199b12012-08-24 00:46:52 +02001202 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001203 if (ic->to_forward != CHN_INFINITE_FORWARD)
1204 ic->to_forward -= ret;
1205 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001206 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001207 ic->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +02001208 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001209
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001210 if (cs->flags & CS_FL_EOS)
Willy Tarreau96199b12012-08-24 00:46:52 +02001211 goto out_shutdown_r;
1212
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001213 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001214 return 1;
Willy Tarreau96199b12012-08-24 00:46:52 +02001215
Willy Tarreau61d39a02013-07-18 21:49:32 +02001216 if (conn->flags & CO_FL_WAIT_ROOM) {
1217 /* the pipe is full or we have read enough data that it
1218 * could soon be full. Let's stop before needing to poll.
1219 */
Willy Tarreaudb398432018-11-15 11:08:52 +01001220 si_rx_room_blk(si);
Willy Tarreauffb12052018-11-15 16:06:02 +01001221 goto done_recv;
Willy Tarreau61d39a02013-07-18 21:49:32 +02001222 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001223
Willy Tarreauce323de2012-08-20 21:41:06 +02001224 /* splice not possible (anymore), let's go on on standard copy */
1225 }
Willy Tarreau81464b42018-11-15 15:52:53 +01001226 else {
1227 /* be sure not to block regular receive path below */
1228 conn->flags &= ~CO_FL_WAIT_ROOM;
1229 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001230
1231 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001232 if (ic->pipe && unlikely(!ic->pipe->data)) {
1233 put_pipe(ic->pipe);
1234 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001235 }
1236
Christopher Fauleta73e59b2016-12-09 17:30:18 +01001237 /* now we'll need a input buffer for the stream */
Willy Tarreau581abd32018-10-25 10:21:41 +02001238 if (!si_alloc_ibuf(si, &(si_strm(si)->buffer_wait)))
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001239 goto end_recv;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001240
Willy Tarreau61d39a02013-07-18 21:49:32 +02001241 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1242 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1243 * that if such an event is not handled above in splice, it will be handled here by
1244 * recv().
1245 */
Olivier Houchardc490efd2018-12-04 15:46:16 +01001246 while ((cs->flags & CS_FL_RCV_MORE) ||
1247 (!(conn->flags & (CO_FL_ERROR | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE)) &&
1248 (!(cs->flags & (CS_FL_ERROR|CS_FL_EOS))) && !(ic->flags & CF_SHUTR))) {
Christopher Faulet4eb7d742018-10-11 15:29:21 +02001249 /* <max> may be null. This is the mux responsibility to set
1250 * CS_FL_RCV_MORE on the CS if more space is needed.
1251 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001252 max = channel_recv_max(ic);
Christopher Faulet72d91252018-10-17 11:08:23 +02001253 ret = cs->conn->mux->rcv_buf(cs, &ic->buf, max,
1254 flags |
1255 (co_data(ic) ? CO_RFL_BUF_WET : 0) |
1256 ((channel_recv_limit(ic) < b_size(&ic->buf)) ? CO_RFL_KEEP_RSV : 0));
Willy Tarreau674e0ad2018-12-05 13:45:41 +01001257
Olivier Houchardd247be02018-12-06 16:22:29 +01001258 if (cs->flags & CS_FL_WANT_ROOM)
Willy Tarreaudb398432018-11-15 11:08:52 +01001259 si_rx_room_blk(si);
Willy Tarreau6577b482017-12-10 21:19:33 +01001260
Christopher Fauleteffc3752018-10-31 08:53:54 +01001261 if (cs->flags & CS_FL_READ_PARTIAL) {
1262 if (tick_isset(ic->rex))
1263 ic->rex = tick_add_ifset(now_ms, ic->rto);
1264 cs->flags &= ~CS_FL_READ_PARTIAL;
1265 }
1266
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001267 if (ret <= 0) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001268 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001269 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001270
1271 cur_read += ret;
1272
1273 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001274 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001275 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001276 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1277 if (fwd > ic->to_forward)
1278 fwd = ic->to_forward;
1279 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001280 }
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001281 c_adv(ic, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001282 }
1283
Willy Tarreauafc8a222014-11-28 15:46:27 +01001284 ic->flags |= CF_READ_PARTIAL;
1285 ic->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001286
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001287 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
1288 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001289 si_rx_chan_blk(si);
Willy Tarreau62dd6982017-11-18 11:26:20 +01001290 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001291 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001292
1293 /* if too many bytes were missing from last read, it means that
1294 * it's pointless trying to read again because the system does
1295 * not have them in buffers.
1296 */
1297 if (ret < max) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001298 /* if a streamer has read few data, it may be because we
1299 * have exhausted system buffers. It's not worth trying
1300 * again.
1301 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001302 if (ic->flags & CF_STREAMER) {
1303 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001304 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001305 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001306 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001307
1308 /* if we read a large block smaller than what we requested,
1309 * it's almost certain we'll never get anything more.
1310 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001311 if (ret >= global.tune.recv_enough) {
1312 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001313 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001314 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001315 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001316 }
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001317
1318 /* if we are waiting for more space, don't try to read more data
1319 * right now.
1320 */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001321 if (si_rx_blocked(si))
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001322 break;
Willy Tarreauce323de2012-08-20 21:41:06 +02001323 } /* while !flags */
1324
Willy Tarreauffb12052018-11-15 16:06:02 +01001325 done_recv:
Willy Tarreauc5890e62014-02-09 17:47:01 +01001326 if (cur_read) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001327 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001328 (cur_read <= ic->buf.size / 2)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001329 ic->xfer_large = 0;
1330 ic->xfer_small++;
1331 if (ic->xfer_small >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001332 /* we have read less than half of the buffer in
1333 * one pass, and this happened at least 3 times.
1334 * This is definitely not a streamer.
1335 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001336 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001337 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001338 else if (ic->xfer_small >= 2) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001339 /* if the buffer has been at least half full twice,
1340 * we receive faster than we send, so at least it
1341 * is not a "fast streamer".
1342 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001343 ic->flags &= ~CF_STREAMER_FAST;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001344 }
1345 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001346 else if (!(ic->flags & CF_STREAMER_FAST) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001347 (cur_read >= ic->buf.size - global.tune.maxrewrite)) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001348 /* we read a full buffer at once */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001349 ic->xfer_small = 0;
1350 ic->xfer_large++;
1351 if (ic->xfer_large >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001352 /* we call this buffer a fast streamer if it manages
1353 * to be filled in one call 3 consecutive times.
1354 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001355 ic->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001356 }
1357 }
1358 else {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001359 ic->xfer_small = 0;
1360 ic->xfer_large = 0;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001361 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001362 ic->last_read = now_ms;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001363 }
1364
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001365 end_recv:
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001366 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001367 return 1;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001368
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001369 if (cs->flags & CS_FL_EOS)
Willy Tarreauce323de2012-08-20 21:41:06 +02001370 /* connection closed */
1371 goto out_shutdown_r;
1372
Willy Tarreau32742fd2018-11-14 14:07:59 +01001373 /* Subscribe to receive events if we're blocking on I/O */
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001374 if (!si_rx_blocked(si)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001375 conn->mux->subscribe(cs, SUB_RETRY_RECV, &si->wait_event);
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001376 si_rx_endp_done(si);
1377 } else {
1378 si_rx_endp_more(si);
1379 }
Olivier Houchardf6535282018-08-31 17:29:12 +02001380
Willy Tarreau32742fd2018-11-14 14:07:59 +01001381 return (cur_read != 0) || si_rx_blocked(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001382
1383 out_shutdown_r:
Olivier Houchardfd0c2dc2018-12-13 15:38:16 +01001384 if (conn->flags & CO_FL_CONNECTED) {
1385 /* we received a shutdown */
1386 ic->flags |= CF_READ_NULL;
1387 if (ic->flags & CF_AUTO_CLOSE)
1388 channel_shutw_now(ic);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +01001389 stream_int_read0(si);
Olivier Houchardfd0c2dc2018-12-13 15:38:16 +01001390 }
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001391 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001392}
1393
1394/*
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001395 * This function propagates a null read received on a socket-based connection.
1396 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001397 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001398 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +01001399static void stream_int_read0(struct stream_interface *si)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001400{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001401 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001402 struct channel *ic = si_ic(si);
1403 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001404
Willy Tarreauabb5d422018-11-14 16:58:52 +01001405 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001406 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001407 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001408 ic->flags |= CF_SHUTR;
1409 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001410
1411 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1412 return;
1413
Willy Tarreauafc8a222014-11-28 15:46:27 +01001414 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001415 goto do_close;
1416
1417 if (si->flags & SI_FL_NOHALF) {
1418 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001419 /* force flag on ssl to keep stream in cache */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001420 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001421 goto do_close;
1422 }
1423
1424 /* otherwise that's just a normal read shutdown */
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001425 return;
1426
1427 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001428 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaua553ae92017-10-05 18:52:17 +02001429 cs_close(cs);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001430
Willy Tarreauafc8a222014-11-28 15:46:27 +01001431 oc->flags &= ~CF_SHUTW_NOW;
1432 oc->flags |= CF_SHUTW;
1433 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001434
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001435 si_done_get(si);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001436
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001437 si->state = SI_ST_DIS;
1438 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001439 return;
1440}
1441
Willy Tarreau651e1822015-09-23 20:06:13 +02001442/* Callback to be used by applet handlers upon completion. It updates the stream
1443 * (which may or may not take this opportunity to try to forward data), then
Emeric Brun2802b072017-06-30 14:11:56 +02001444 * may re-enable the applet's based on the channels and stream interface's final
Willy Tarreau651e1822015-09-23 20:06:13 +02001445 * states.
1446 */
Willy Tarreauaa977ba2015-09-25 11:45:06 +02001447void si_applet_wake_cb(struct stream_interface *si)
Willy Tarreaue5f86492015-04-19 15:16:35 +02001448{
Willy Tarreaueca572f2015-09-25 19:11:55 +02001449 struct channel *ic = si_ic(si);
1450
1451 /* If the applet wants to write and the channel is closed, it's a
1452 * broken pipe and it must be reported.
1453 */
Willy Tarreau05b9b642018-11-14 13:43:35 +01001454 if (!(si->flags & SI_FL_RX_WAIT_EP) && (ic->flags & CF_SHUTR))
Willy Tarreaueca572f2015-09-25 19:11:55 +02001455 si->flags |= SI_FL_ERR;
1456
Willy Tarreau186dcdd2018-11-16 16:18:34 +01001457 /* automatically mark the applet having data available if it reported
1458 * begin blocked by the channel.
1459 */
1460 if (si_rx_blocked(si))
1461 si_rx_endp_more(si);
1462
Willy Tarreau651e1822015-09-23 20:06:13 +02001463 /* update the stream-int, channels, and possibly wake the stream up */
1464 stream_int_notify(si);
Willy Tarreaue5f86492015-04-19 15:16:35 +02001465
Willy Tarreau32742fd2018-11-14 14:07:59 +01001466 /* stream_int_notify may have passed through chk_snd and released some
1467 * RXBLK flags. Process_stream will consider those flags to wake up the
1468 * appctx but in the case the task is not in runqueue we may have to
1469 * wakeup the appctx immediately.
Emeric Brun2802b072017-06-30 14:11:56 +02001470 */
Olivier Houchard51205a12019-04-17 19:29:35 +02001471 if ((si_rx_endp_ready(si) && !si_rx_blocked(si)) ||
1472 (si_tx_endp_ready(si) && !si_tx_blocked(si)))
Willy Tarreau563cc372015-04-19 18:13:56 +02001473 appctx_wakeup(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001474}
1475
1476/*
1477 * This function performs a shutdown-read on a stream interface attached to an
1478 * applet in a connected or init state (it does nothing for other states). It
1479 * either shuts the read side or marks itself as closed. The buffer flags are
1480 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1481 * we also forward the close to the write side. The owner task is woken up if
1482 * it exists.
1483 */
1484static void stream_int_shutr_applet(struct stream_interface *si)
1485{
1486 struct channel *ic = si_ic(si);
1487
Willy Tarreauabb5d422018-11-14 16:58:52 +01001488 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001489 if (ic->flags & CF_SHUTR)
1490 return;
1491 ic->flags |= CF_SHUTR;
1492 ic->rex = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001493
Willy Tarreau828824a2015-04-19 17:20:03 +02001494 /* Note: on shutr, we don't call the applet */
1495
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001496 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1497 return;
1498
1499 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau958f0742015-09-25 20:24:26 +02001500 si_applet_release(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001501 si->state = SI_ST_DIS;
1502 si->exp = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001503 }
1504 else if (si->flags & SI_FL_NOHALF) {
1505 /* we want to immediately forward this close to the write side */
1506 return stream_int_shutw_applet(si);
1507 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001508}
1509
1510/*
1511 * This function performs a shutdown-write on a stream interface attached to an
1512 * applet in a connected or init state (it does nothing for other states). It
1513 * either shuts the write side or marks itself as closed. The buffer flags are
1514 * updated to reflect the new state. It does also close everything if the SI
1515 * was marked as being in error state. The owner task is woken up if it exists.
1516 */
1517static void stream_int_shutw_applet(struct stream_interface *si)
1518{
1519 struct channel *ic = si_ic(si);
1520 struct channel *oc = si_oc(si);
1521
1522 oc->flags &= ~CF_SHUTW_NOW;
1523 if (oc->flags & CF_SHUTW)
1524 return;
1525 oc->flags |= CF_SHUTW;
1526 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001527 si_done_get(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001528
Hongbo Longe39683c2017-03-10 18:41:51 +01001529 if (tick_isset(si->hcto)) {
1530 ic->rto = si->hcto;
1531 ic->rex = tick_add(now_ms, ic->rto);
1532 }
1533
Willy Tarreau828824a2015-04-19 17:20:03 +02001534 /* on shutw we always wake the applet up */
1535 appctx_wakeup(si_appctx(si));
1536
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001537 switch (si->state) {
1538 case SI_ST_EST:
1539 /* we have to shut before closing, otherwise some short messages
1540 * may never leave the system, especially when there are remaining
1541 * unread data in the socket input buffer, or when nolinger is set.
1542 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1543 * no risk so we close both sides immediately.
1544 */
1545 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1546 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1547 return;
1548
1549 /* fall through */
1550 case SI_ST_CON:
1551 case SI_ST_CER:
1552 case SI_ST_QUE:
1553 case SI_ST_TAR:
1554 /* Note that none of these states may happen with applets */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001555 si_applet_release(si);
Willy Tarreau958f0742015-09-25 20:24:26 +02001556 si->state = SI_ST_DIS;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001557 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +01001558 si->flags &= ~SI_FL_NOLINGER;
1559 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001560 ic->flags |= CF_SHUTR;
1561 ic->rex = TICK_ETERNITY;
1562 si->exp = TICK_ETERNITY;
1563 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001564}
1565
1566/* chk_rcv function for applets */
1567static void stream_int_chk_rcv_applet(struct stream_interface *si)
1568{
1569 struct channel *ic = si_ic(si);
1570
1571 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1572 __FUNCTION__,
1573 si, si->state, ic->flags, si_oc(si)->flags);
1574
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001575 if (!ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001576 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001577 appctx_wakeup(si_appctx(si));
Thierry FOURNIER5bc2cbf2015-09-04 18:40:36 +02001578 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001579}
1580
1581/* chk_snd function for applets */
1582static void stream_int_chk_snd_applet(struct stream_interface *si)
1583{
1584 struct channel *oc = si_oc(si);
1585
1586 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1587 __FUNCTION__,
1588 si, si->state, si_ic(si)->flags, oc->flags);
1589
1590 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1591 return;
1592
Willy Tarreau828824a2015-04-19 17:20:03 +02001593 /* we only wake the applet up if it was waiting for some data */
1594
1595 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001596 return;
1597
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001598 if (!tick_isset(oc->wex))
1599 oc->wex = tick_add_ifset(now_ms, oc->wto);
1600
Willy Tarreau828824a2015-04-19 17:20:03 +02001601 if (!channel_is_empty(oc)) {
1602 /* (re)start sending */
1603 appctx_wakeup(si_appctx(si));
1604 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001605}
1606
Willy Tarreaudded32d2008-11-30 19:48:07 +01001607/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001608 * Local variables:
1609 * c-indent-level: 8
1610 * c-basic-offset: 8
1611 * End:
1612 */