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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 Tarreau4c7e4b72020-05-27 12:58:42 +020022#include <haproxy/api.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020023#include <haproxy/applet.h>
Willy Tarreauf1d32c42020-06-04 21:07:02 +020024#include <haproxy/channel.h>
Willy Tarreau7ea393d2020-06-04 18:02:10 +020025#include <haproxy/connection.h>
Willy Tarreau2741c8c2020-06-02 11:28:02 +020026#include <haproxy/dynbuf.h>
Willy Tarreau87735332020-06-04 09:08:41 +020027#include <haproxy/http_htx.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020028#include <haproxy/pipe-t.h>
29#include <haproxy/pipe.h>
Willy Tarreaua264d962020-06-04 22:29:18 +020030#include <haproxy/proxy.h>
Willy Tarreaudfd3de82020-06-04 23:46:14 +020031#include <haproxy/stream-t.h>
Willy Tarreau5e539c92020-06-04 20:45:39 +020032#include <haproxy/stream_interface.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020033#include <haproxy/task.h>
Willy Tarreauc2f7c582020-06-02 18:15:32 +020034#include <haproxy/ticks.h>
Willy Tarreau92b4f132020-06-01 11:05:15 +020035#include <haproxy/time.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020036#include <haproxy/tools.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010037
Willy Tarreaufd31e532012-07-23 18:24:25 +020038
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010039/* functions used by default on a detached stream-interface */
Willy Tarreau6fe15412013-09-29 15:16:03 +020040static void stream_int_shutr(struct stream_interface *si);
41static void stream_int_shutw(struct stream_interface *si);
Willy Tarreauf873d752012-05-11 17:47:17 +020042static void stream_int_chk_rcv(struct stream_interface *si);
43static void stream_int_chk_snd(struct stream_interface *si);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010044
45/* functions used on a conn_stream-based stream-interface */
Willy Tarreau6fe15412013-09-29 15:16:03 +020046static void stream_int_shutr_conn(struct stream_interface *si);
47static void stream_int_shutw_conn(struct stream_interface *si);
Willy Tarreauc5788912012-08-24 18:12:41 +020048static void stream_int_chk_rcv_conn(struct stream_interface *si);
49static void stream_int_chk_snd_conn(struct stream_interface *si);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010050
51/* functions used on an applet-based stream-interface */
Willy Tarreaud45b9f82015-04-13 16:30:14 +020052static void stream_int_shutr_applet(struct stream_interface *si);
53static void stream_int_shutw_applet(struct stream_interface *si);
54static void stream_int_chk_rcv_applet(struct stream_interface *si);
55static void stream_int_chk_snd_applet(struct stream_interface *si);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010056
57/* last read notification */
58static void stream_int_read0(struct stream_interface *si);
59
60/* post-IO notification callback */
61static void stream_int_notify(struct stream_interface *si);
Willy Tarreauf873d752012-05-11 17:47:17 +020062
Willy Tarreauc5788912012-08-24 18:12:41 +020063/* stream-interface operations for embedded tasks */
64struct si_ops si_embedded_ops = {
Willy Tarreau5c979a92012-05-07 17:15:39 +020065 .chk_rcv = stream_int_chk_rcv,
66 .chk_snd = stream_int_chk_snd,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020067 .shutr = stream_int_shutr,
68 .shutw = stream_int_shutw,
Willy Tarreau5c979a92012-05-07 17:15:39 +020069};
70
Willy Tarreauc5788912012-08-24 18:12:41 +020071/* stream-interface operations for connections */
72struct si_ops si_conn_ops = {
Willy Tarreauc5788912012-08-24 18:12:41 +020073 .chk_rcv = stream_int_chk_rcv_conn,
74 .chk_snd = stream_int_chk_snd_conn,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020075 .shutr = stream_int_shutr_conn,
76 .shutw = stream_int_shutw_conn,
Willy Tarreauc5788912012-08-24 18:12:41 +020077};
78
Willy Tarreaud45b9f82015-04-13 16:30:14 +020079/* stream-interface operations for connections */
80struct si_ops si_applet_ops = {
Willy Tarreaud45b9f82015-04-13 16:30:14 +020081 .chk_rcv = stream_int_chk_rcv_applet,
82 .chk_snd = stream_int_chk_snd_applet,
83 .shutr = stream_int_shutr_applet,
84 .shutw = stream_int_shutw_applet,
85};
86
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010087
88/* Functions used to communicate with a conn_stream. The first two may be used
89 * directly, the last one is mostly a wake callback.
90 */
91int si_cs_recv(struct conn_stream *cs);
92int si_cs_send(struct conn_stream *cs);
93static int si_cs_process(struct conn_stream *cs);
94
95
Willy Tarreau74beec32012-10-03 00:41:04 +020096struct data_cb si_conn_cb = {
Olivier Houchard21df6cc2018-09-14 23:21:44 +020097 .wake = si_cs_process,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +010098 .name = "STRM",
Willy Tarreauc5788912012-08-24 18:12:41 +020099};
100
Willy Tarreaucff64112008-11-03 06:26:53 +0100101/*
102 * This function only has to be called once after a wakeup event in case of
103 * suspected timeout. It controls the stream interface timeouts and sets
104 * si->flags accordingly. It does NOT close anything, as this timeout may
105 * be used for any purpose. It returns 1 if the timeout fired, otherwise
106 * zero.
107 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100108int si_check_timeouts(struct stream_interface *si)
Willy Tarreaucff64112008-11-03 06:26:53 +0100109{
110 if (tick_is_expired(si->exp, now_ms)) {
111 si->flags |= SI_FL_EXP;
112 return 1;
113 }
114 return 0;
115}
116
Willy Tarreaufe3718a2008-11-30 18:14:12 +0100117/* to be called only when in SI_ST_DIS with SI_FL_ERR */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100118void si_report_error(struct stream_interface *si)
Willy Tarreaucff64112008-11-03 06:26:53 +0100119{
120 if (!si->err_type)
121 si->err_type = SI_ET_DATA_ERR;
122
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100123 si_oc(si)->flags |= CF_WRITE_ERROR;
124 si_ic(si)->flags |= CF_READ_ERROR;
Willy Tarreaucff64112008-11-03 06:26:53 +0100125}
126
127/*
Willy Tarreaudded32d2008-11-30 19:48:07 +0100128 * Returns a message to the client ; the connection is shut down for read,
129 * and the request is cleared so that no server connection can be initiated.
130 * The buffer is marked for read shutdown on the other side to protect the
131 * message, and the buffer write is enabled. The message is contained in a
Willy Tarreau148d0992010-01-10 10:21:21 +0100132 * "chunk". If it is null, then an empty message is used. The reply buffer does
133 * not need to be empty before this, and its contents will not be overwritten.
134 * The primary goal of this function is to return error messages to a client.
Willy Tarreaudded32d2008-11-30 19:48:07 +0100135 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100136void si_retnclose(struct stream_interface *si,
Willy Tarreau83061a82018-07-13 11:56:34 +0200137 const struct buffer *msg)
Willy Tarreaudded32d2008-11-30 19:48:07 +0100138{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100139 struct channel *ic = si_ic(si);
140 struct channel *oc = si_oc(si);
141
142 channel_auto_read(ic);
143 channel_abort(ic);
144 channel_auto_close(ic);
145 channel_erase(ic);
146 channel_truncate(oc);
Willy Tarreau798e1282010-12-12 13:06:00 +0100147
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200148 if (likely(msg && msg->data))
149 co_inject(oc, msg->area, msg->data);
Willy Tarreaudded32d2008-11-30 19:48:07 +0100150
Willy Tarreauafc8a222014-11-28 15:46:27 +0100151 oc->wex = tick_add_ifset(now_ms, oc->wto);
152 channel_auto_read(oc);
153 channel_auto_close(oc);
154 channel_shutr_now(oc);
Willy Tarreau5d881d02009-12-27 22:51:06 +0100155}
156
Christopher Faulet08efeba2023-02-08 16:18:48 +0100157/* Conditionnaly forward the close to the wirte side. It return 1 if it can be
158 * forwarded. It is the caller responsibility to forward the close to the write
159 * side. Otherwise, 0 is returned. In this case, CF_SHUTW_NOW flag may be set on
160 * the channel if we are only waiting for the outgoing data to be flushed.
161 */
162static inline int si_cond_forward_shutw(struct stream_interface *si)
163{
164 /* The close must not be forwarded */
165 if (!(si_ic(si)->flags & CF_SHUTR) || !(si->flags & SI_FL_NOHALF))
166 return 0;
167
168 if (!channel_is_empty(si_ic(si))) {
169 /* the close to the write side cannot be forwarded now because
170 * we should flush outgoing data first. But instruct the output
171 * channel it should be done ASAP.
172 */
173 channel_shutw_now(si_oc(si));
174 return 0;
175 }
176
177 /* the close can be immediately forwarded to the write side */
178 return 1;
179}
180
Willy Tarreau4a36b562012-08-06 19:31:45 +0200181/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200182 * This function performs a shutdown-read on a detached stream interface in a
183 * connected or init state (it does nothing for other states). It either shuts
184 * the read side or marks itself as closed. The buffer flags are updated to
185 * reflect the new state. If the stream interface has SI_FL_NOHALF, we also
186 * forward the close to the write side. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200187 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200188static void stream_int_shutr(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200189{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100190 struct channel *ic = si_ic(si);
191
Willy Tarreauabb5d422018-11-14 16:58:52 +0100192 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100193 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200194 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100195 ic->flags |= CF_SHUTR;
196 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200197
Willy Tarreau4f283fa2019-06-05 14:34:03 +0200198 if (!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200199 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200200
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100201 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200202 si->state = SI_ST_DIS;
203 si->exp = TICK_ETERNITY;
Willy Tarreaud8ccffe2010-09-07 16:16:50 +0200204 }
Christopher Faulet08efeba2023-02-08 16:18:48 +0100205 else if (si_cond_forward_shutw(si)) {
Willy Tarreau4a36b562012-08-06 19:31:45 +0200206 /* we want to immediately forward this close to the write side */
207 return stream_int_shutw(si);
208 }
Willy Tarreau0bd05ea2010-07-02 11:18:03 +0200209
Willy Tarreau4a36b562012-08-06 19:31:45 +0200210 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100211 if (!(si->flags & SI_FL_DONT_WAKE))
212 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200213}
214
Willy Tarreau4a36b562012-08-06 19:31:45 +0200215/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200216 * This function performs a shutdown-write on a detached stream interface in a
217 * connected or init state (it does nothing for other states). It either shuts
218 * the write side or marks itself as closed. The buffer flags are updated to
219 * reflect the new state. It does also close everything if the SI was marked as
220 * being in error state. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200221 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200222static void stream_int_shutw(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200223{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100224 struct channel *ic = si_ic(si);
225 struct channel *oc = si_oc(si);
226
227 oc->flags &= ~CF_SHUTW_NOW;
228 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200229 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100230 oc->flags |= CF_SHUTW;
231 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +0100232 si_done_get(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200233
Hongbo Longe39683c2017-03-10 18:41:51 +0100234 if (tick_isset(si->hcto)) {
235 ic->rto = si->hcto;
236 ic->rex = tick_add(now_ms, ic->rto);
237 }
238
Willy Tarreaufb90d942009-09-05 20:57:35 +0200239 switch (si->state) {
Willy Tarreau4f283fa2019-06-05 14:34:03 +0200240 case SI_ST_RDY:
Willy Tarreaufb90d942009-09-05 20:57:35 +0200241 case SI_ST_EST:
Willy Tarreau4a36b562012-08-06 19:31:45 +0200242 /* we have to shut before closing, otherwise some short messages
243 * may never leave the system, especially when there are remaining
244 * unread data in the socket input buffer, or when nolinger is set.
245 * However, if SI_FL_NOLINGER is explicitly set, we know there is
246 * no risk so we close both sides immediately.
247 */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200248 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
Willy Tarreauafc8a222014-11-28 15:46:27 +0100249 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200250 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200251
252 /* fall through */
253 case SI_ST_CON:
254 case SI_ST_CER:
Willy Tarreau32d3ee92010-12-29 14:03:02 +0100255 case SI_ST_QUE:
256 case SI_ST_TAR:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200257 /* Note that none of these states may happen with applets */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200258 si->state = SI_ST_DIS;
Tim Duesterhus588b3142020-05-29 14:35:51 +0200259 /* fall through */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200260 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +0100261 si->flags &= ~SI_FL_NOLINGER;
262 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100263 ic->flags |= CF_SHUTR;
264 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200265 si->exp = TICK_ETERNITY;
266 }
267
Willy Tarreau4a36b562012-08-06 19:31:45 +0200268 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100269 if (!(si->flags & SI_FL_DONT_WAKE))
270 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200271}
272
273/* default chk_rcv function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200274static void stream_int_chk_rcv(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200275{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100276 struct channel *ic = si_ic(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200277
Willy Tarreauafc8a222014-11-28 15:46:27 +0100278 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200279 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100280 si, si->state, ic->flags, si_oc(si)->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200281
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200282 if (ic->pipe) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200283 /* stop reading */
Willy Tarreaudb398432018-11-15 11:08:52 +0100284 si_rx_room_blk(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200285 }
286 else {
287 /* (re)start reading */
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200288 tasklet_wakeup(si->wait_event.tasklet);
Willy Tarreau07373b82014-11-28 12:08:47 +0100289 if (!(si->flags & SI_FL_DONT_WAKE))
290 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200291 }
292}
293
294/* default chk_snd function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200295static void stream_int_chk_snd(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200296{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100297 struct channel *oc = si_oc(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200298
Willy Tarreauafc8a222014-11-28 15:46:27 +0100299 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200300 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100301 si, si->state, si_ic(si)->flags, oc->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200302
Willy Tarreauafc8a222014-11-28 15:46:27 +0100303 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200304 return;
305
306 if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100307 channel_is_empty(oc)) /* called with nothing to send ! */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200308 return;
309
310 /* Otherwise there are remaining data to be sent in the buffer,
311 * so we tell the handler.
312 */
313 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100314 if (!tick_isset(oc->wex))
315 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200316
Willy Tarreau07373b82014-11-28 12:08:47 +0100317 if (!(si->flags & SI_FL_DONT_WAKE))
318 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200319}
320
Willy Tarreaua9ff5e62015-07-19 18:46:30 +0200321/* Register an applet to handle a stream_interface as a new appctx. The SI will
Thayne McCombs8f0cc5c2021-01-07 21:35:52 -0700322 * wake it up every time it is solicited. The appctx must be deleted by the task
Willy Tarreaua9ff5e62015-07-19 18:46:30 +0200323 * handler using si_release_endpoint(), possibly from within the function itself.
324 * It also pre-initializes the applet's context and returns it (or NULL in case
325 * it could not be allocated).
Willy Tarreaufb90d942009-09-05 20:57:35 +0200326 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100327struct appctx *si_register_handler(struct stream_interface *si, struct applet *app)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200328{
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100329 struct appctx *appctx;
330
Willy Tarreau07373b82014-11-28 12:08:47 +0100331 DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si_task(si));
Willy Tarreaufb90d942009-09-05 20:57:35 +0200332
Willy Tarreaua7513f52015-04-05 00:15:26 +0200333 appctx = si_alloc_appctx(si, app);
Willy Tarreaua69fc9f2014-12-22 19:34:00 +0100334 if (!appctx)
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100335 return NULL;
336
Willy Tarreau0cd3bd62018-11-06 18:46:37 +0100337 si_cant_get(si);
Willy Tarreau828824a2015-04-19 17:20:03 +0200338 appctx_wakeup(appctx);
Willy Tarreau1fbe1c92013-12-01 09:35:41 +0100339 return si_appctx(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200340}
341
Willy Tarreau2c6be842012-07-06 17:12:34 +0200342/* This callback is used to send a valid PROXY protocol line to a socket being
Willy Tarreauafad0e02012-08-09 14:45:22 +0200343 * established. It returns 0 if it fails in a fatal way or needs to poll to go
344 * further, otherwise it returns non-zero and removes itself from the connection's
Willy Tarreaua1a74742012-08-24 12:14:49 +0200345 * flags (the bit is provided in <flag> by the caller). It is designed to be
346 * called by the connection handler and relies on it to commit polling changes.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200347 * Note that it can emit a PROXY line by relying on the other end's address
348 * when the connection is attached to a stream interface, or by resolving the
349 * local address otherwise (also called a LOCAL line).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200350 */
351int conn_si_send_proxy(struct connection *conn, unsigned int flag)
352{
Willy Tarreaud02cdd22013-12-15 10:23:20 +0100353 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200354 goto out_error;
355
Willy Tarreau2c6be842012-07-06 17:12:34 +0200356 /* If we have a PROXY line to send, we'll use this to validate the
357 * connection, in which case the connection is validated only once
358 * we've sent the whole proxy line. Otherwise we use connect().
359 */
Tim Duesterhus36839dc2019-02-26 17:09:51 +0100360 if (conn->send_proxy_ofs) {
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100361 const struct conn_stream *cs;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200362 int ret;
363
Christopher Fauletd82056c2020-05-26 16:08:49 +0200364 /* If there is no mux attached to the connection, it means the
365 * connection context is a conn-stream.
366 */
367 cs = (conn->mux ? cs_get_first(conn) : conn->ctx);
368
Willy Tarreau2c6be842012-07-06 17:12:34 +0200369 /* The target server expects a PROXY line to be sent first.
370 * If the send_proxy_ofs is negative, it corresponds to the
371 * offset to start sending from then end of the proxy string
372 * (which is recomputed every time since it's constant). If
373 * it is positive, it means we have to send from the start.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200374 * We can only send a "normal" PROXY line when the connection
375 * is attached to a stream interface. Otherwise we can only
376 * send a LOCAL line (eg: for use with health checks).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200377 */
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100378
379 if (cs && cs->data_cb == &si_conn_cb) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200380 struct stream_interface *si = cs->data;
381 struct conn_stream *remote_cs = objt_cs(si_opposite(si)->end);
Tim Duesterhuscf6e0c82020-03-13 12:34:24 +0100382 struct stream *strm = si_strm(si);
383
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200384 ret = make_proxy_line(trash.area, trash.size,
385 objt_server(conn->target),
Tim Duesterhuscf6e0c82020-03-13 12:34:24 +0100386 remote_cs ? remote_cs->conn : NULL,
387 strm);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200388 }
389 else {
390 /* The target server expects a LOCAL line to be sent first. Retrieving
391 * local or remote addresses may fail until the connection is established.
392 */
Willy Tarreau7bb447c2019-07-17 11:40:51 +0200393 if (!conn_get_src(conn) || !conn_get_dst(conn))
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200394 goto out_wait;
395
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200396 ret = make_proxy_line(trash.area, trash.size,
Tim Duesterhuscf6e0c82020-03-13 12:34:24 +0100397 objt_server(conn->target), conn,
398 NULL);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200399 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200400
Willy Tarreau2c6be842012-07-06 17:12:34 +0200401 if (!ret)
402 goto out_error;
403
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200404 if (conn->send_proxy_ofs > 0)
405 conn->send_proxy_ofs = -ret; /* first call */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200406
Willy Tarreaua1a74742012-08-24 12:14:49 +0200407 /* we have to send trash from (ret+sp for -sp bytes). If the
408 * data layer has a pending write, we'll also set MSG_MORE.
409 */
Willy Tarreau827fee72020-12-11 15:26:55 +0100410 ret = conn_ctrl_send(conn,
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200411 trash.area + ret + conn->send_proxy_ofs,
412 -conn->send_proxy_ofs,
Willy Tarreau827fee72020-12-11 15:26:55 +0100413 (conn->subs && conn->subs->events & SUB_RETRY_SEND) ? CO_SFL_MSG_MORE : 0);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200414
Willy Tarreau0a03c0f2015-03-13 00:05:28 +0100415 if (ret < 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200416 goto out_error;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200417
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200418 conn->send_proxy_ofs += ret; /* becomes zero once complete */
419 if (conn->send_proxy_ofs != 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200420 goto out_wait;
421
422 /* OK we've sent the whole line, we're connected */
423 }
424
Willy Tarreaua1a74742012-08-24 12:14:49 +0200425 /* The connection is ready now, simply return and let the connection
426 * handler notify upper layers if needed.
Willy Tarreau2c6be842012-07-06 17:12:34 +0200427 */
Willy Tarreauc192b0a2020-01-23 09:11:58 +0100428 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200429 conn->flags &= ~flag;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200430 return 1;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200431
432 out_error:
Willy Tarreauafad0e02012-08-09 14:45:22 +0200433 /* Write error on the file descriptor */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200434 conn->flags |= CO_FL_ERROR;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200435 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200436
437 out_wait:
Willy Tarreauafad0e02012-08-09 14:45:22 +0200438 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200439}
440
Willy Tarreau27375622013-12-17 00:00:28 +0100441
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100442/* This function is the equivalent to si_update() except that it's
Willy Tarreau615f28b2015-09-23 18:40:09 +0200443 * designed to be called from outside the stream handlers, typically the lower
444 * layers (applets, connections) after I/O completion. After updating the stream
445 * interface and timeouts, it will try to forward what can be forwarded, then to
446 * wake the associated task up if an important event requires special handling.
Willy Tarreaud0f5bbc2018-11-14 11:10:26 +0100447 * It may update SI_FL_WAIT_DATA and/or SI_FL_RXBLK_ROOM, that the callers are
Willy Tarreau0dfccb22018-10-25 13:55:20 +0200448 * encouraged to watch to take appropriate action.
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100449 * It should not be called from within the stream itself, si_update()
Willy Tarreau615f28b2015-09-23 18:40:09 +0200450 * is designed for this.
451 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100452static void stream_int_notify(struct stream_interface *si)
Willy Tarreau615f28b2015-09-23 18:40:09 +0200453{
454 struct channel *ic = si_ic(si);
455 struct channel *oc = si_oc(si);
Willy Tarreau47baeb82018-11-15 07:46:57 +0100456 struct stream_interface *sio = si_opposite(si);
Christopher Fauletd7607de2019-01-03 16:24:54 +0100457 struct task *task = si_task(si);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200458
459 /* process consumer side */
460 if (channel_is_empty(oc)) {
Willy Tarreau66182592021-12-06 07:01:02 +0000461 struct connection *conn = objt_cs(si->end) ? __objt_cs(si->end)->conn : NULL;
Olivier Houcharde9bed532017-11-16 17:49:25 +0100462
Willy Tarreau615f28b2015-09-23 18:40:09 +0200463 if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) &&
Willy Tarreau911db9b2020-01-23 16:27:54 +0100464 (si->state == SI_ST_EST) && (!conn || !(conn->flags & (CO_FL_WAIT_XPRT | CO_FL_EARLY_SSL_HS))))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200465 si_shutw(si);
466 oc->wex = TICK_ETERNITY;
467 }
468
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100469 /* indicate that we may be waiting for data from the output channel or
470 * we're about to close and can't expect more data if SHUTW_NOW is there.
471 */
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200472 if (!(oc->flags & (CF_SHUTW|CF_SHUTW_NOW)))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200473 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100474 else if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)
475 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200476
477 /* update OC timeouts and wake the other side up if it's waiting for room */
478 if (oc->flags & CF_WRITE_ACTIVITY) {
479 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
480 !channel_is_empty(oc))
481 if (tick_isset(oc->wex))
482 oc->wex = tick_add_ifset(now_ms, oc->wto);
483
484 if (!(si->flags & SI_FL_INDEP_STR))
485 if (tick_isset(ic->rex))
486 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreauf26c26c2018-11-12 16:11:08 +0100487 }
Willy Tarreau615f28b2015-09-23 18:40:09 +0200488
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100489 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 Tarreau4f283fa2019-06-05 14:34:03 +0200545 !si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST) ||
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)));
Willy Tarreau45bcb372019-08-01 18:51:38 +0200565
566 task->expire = tick_first(task->expire, ic->analyse_exp);
567 task->expire = tick_first(task->expire, oc->analyse_exp);
568
569 if (si->exp)
570 task->expire = tick_first(task->expire, si->exp);
571
572 if (sio->exp)
573 task->expire = tick_first(task->expire, sio->exp);
574
Christopher Fauletd7607de2019-01-03 16:24:54 +0100575 task_queue(task);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200576 }
577 if (ic->flags & CF_READ_ACTIVITY)
578 ic->flags &= ~CF_READ_DONTWAIT;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200579}
580
Willy Tarreaub3666ef2022-03-17 16:19:09 +0100581/* The stream interface is only responsible for the connection during the early
582 * states, before plugging a mux. Thus it should only care about CO_FL_ERROR
583 * before SI_ST_EST, and after that it must absolutely ignore it since the mux
584 * may hold pending data. This function returns true if such an error was
585 * reported. Both the CS and the CONN must be valid.
586 */
587static inline int si_is_conn_error(const struct stream_interface *si)
588{
589 struct connection *conn;
590
591 if (si->state >= SI_ST_EST)
592 return 0;
593
594 conn = __objt_cs(si->end)->conn;
595 BUG_ON(!conn);
596 return !!(conn->flags & CO_FL_ERROR);
597}
Willy Tarreau615f28b2015-09-23 18:40:09 +0200598
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200599/* Called by I/O handlers after completion.. It propagates
Willy Tarreau651e1822015-09-23 20:06:13 +0200600 * connection flags to the stream interface, updates the stream (which may or
601 * may not take this opportunity to try to forward data), then update the
602 * connection's polling based on the channels and stream interface's final
603 * states. The function always returns 0.
Willy Tarreau100c4672012-08-20 12:06:26 +0200604 */
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200605static int si_cs_process(struct conn_stream *cs)
Willy Tarreaufd31e532012-07-23 18:24:25 +0200606{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200607 struct connection *conn = cs->conn;
608 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100609 struct channel *ic = si_ic(si);
610 struct channel *oc = si_oc(si);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200611
Olivier Houchardc7ffa912018-08-28 19:37:41 +0200612 /* If we have data to send, try it now */
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100613 if (!channel_is_empty(oc) && !(si->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau908d26f2018-10-25 14:02:47 +0200614 si_cs_send(cs);
615
Willy Tarreau651e1822015-09-23 20:06:13 +0200616 /* First step, report to the stream-int what was detected at the
617 * connection layer : errors and connection establishment.
Olivier Houchardc31e2cb2019-06-24 16:08:08 +0200618 * Only add SI_FL_ERR if we're connected, or we're attempting to
619 * connect, we may get there because we got woken up, but only run
620 * after process_stream() noticed there were an error, and decided
621 * to retry to connect, the connection may still have CO_FL_ERROR,
622 * and we don't want to add SI_FL_ERR back
Christopher Faulet36b536d2019-11-20 11:56:33 +0100623 *
624 * Note: This test is only required because si_cs_process is also the SI
625 * wake callback. Otherwise si_cs_recv()/si_cs_send() already take
626 * care of it.
Willy Tarreau651e1822015-09-23 20:06:13 +0200627 */
Willy Tarreaub3666ef2022-03-17 16:19:09 +0100628
629 if (si->state >= SI_ST_CON) {
630 if ((cs->flags & CS_FL_ERROR) || si_is_conn_error(si))
631 si->flags |= SI_FL_ERR;
632 }
Willy Tarreau3c55ec22012-07-23 19:19:51 +0200633
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200634 /* If we had early data, and the handshake ended, then
635 * we can remove the flag, and attempt to wake the task up,
636 * in the event there's an analyser waiting for the end of
637 * the handshake.
638 */
Willy Tarreau911db9b2020-01-23 16:27:54 +0100639 if (!(conn->flags & (CO_FL_WAIT_XPRT | CO_FL_EARLY_SSL_HS)) &&
Olivier Houchard6fa63d92017-11-27 18:41:32 +0100640 (cs->flags & CS_FL_WAIT_FOR_HS)) {
641 cs->flags &= ~CS_FL_WAIT_FOR_HS;
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200642 task_wakeup(si_task(si), TASK_WOKEN_MSG);
643 }
644
Willy Tarreau7ab22adb2019-06-05 14:53:22 +0200645 if (!si_state_in(si->state, SI_SB_EST|SI_SB_DIS|SI_SB_CLO) &&
Willy Tarreau911db9b2020-01-23 16:27:54 +0100646 (conn->flags & CO_FL_WAIT_XPRT) == 0) {
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200647 si->exp = TICK_ETERNITY;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100648 oc->flags |= CF_WRITE_NULL;
Willy Tarreaub27f54a2019-06-05 16:43:44 +0200649 if (si->state == SI_ST_CON)
650 si->state = SI_ST_RDY;
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200651 }
652
Christopher Faulet89e34c22021-01-21 16:22:01 +0100653 /* Report EOS on the channel if it was reached from the mux point of
654 * view.
655 *
656 * Note: This test is only required because si_cs_process is also the SI
657 * wake callback. Otherwise si_cs_recv()/si_cs_send() already take
658 * care of it.
659 */
660 if (cs->flags & CS_FL_EOS && !(ic->flags & CF_SHUTR)) {
661 /* we received a shutdown */
662 ic->flags |= CF_READ_NULL;
663 if (ic->flags & CF_AUTO_CLOSE)
664 channel_shutw_now(ic);
665 stream_int_read0(si);
666 }
667
Christopher Faulet297d3e22019-03-22 14:16:14 +0100668 /* Report EOI on the channel if it was reached from the mux point of
Christopher Faulet36b536d2019-11-20 11:56:33 +0100669 * view.
670 *
671 * Note: This test is only required because si_cs_process is also the SI
672 * wake callback. Otherwise si_cs_recv()/si_cs_send() already take
673 * care of it.
674 */
Christopher Faulet297d3e22019-03-22 14:16:14 +0100675 if ((cs->flags & CS_FL_EOI) && !(ic->flags & CF_EOI))
Christopher Faulet8e9e3ef2019-05-17 09:14:10 +0200676 ic->flags |= (CF_EOI|CF_READ_PARTIAL);
Christopher Faulet203b2b02019-03-08 09:23:46 +0100677
Willy Tarreau651e1822015-09-23 20:06:13 +0200678 /* Second step : update the stream-int and channels, try to forward any
679 * pending data, then possibly wake the stream up based on the new
680 * stream-int status.
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200681 */
Willy Tarreau651e1822015-09-23 20:06:13 +0200682 stream_int_notify(si);
Willy Tarreaua64c7032019-08-01 14:17:02 +0200683 stream_release_buffers(si_strm(si));
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200684 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200685}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200686
Willy Tarreau5368d802012-08-21 18:22:06 +0200687/*
688 * This function is called to send buffer data to a stream socket.
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200689 * It calls the mux layer's snd_buf function. It relies on the
Godbach4f489902013-12-04 17:24:06 +0800690 * caller to commit polling changes. The caller should check conn->flags
691 * for errors.
Willy Tarreau5368d802012-08-21 18:22:06 +0200692 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +0200693int si_cs_send(struct conn_stream *cs)
Willy Tarreau5368d802012-08-21 18:22:06 +0200694{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200695 struct connection *conn = cs->conn;
696 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100697 struct channel *oc = si_oc(si);
Willy Tarreau5368d802012-08-21 18:22:06 +0200698 int ret;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200699 int did_send = 0;
700
Willy Tarreaub3666ef2022-03-17 16:19:09 +0100701 if (cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING) || si_is_conn_error(si)) {
Olivier Houchardc31e2cb2019-06-24 16:08:08 +0200702 /* We're probably there because the tasklet was woken up,
703 * but process_stream() ran before, detected there were an
704 * error and put the si back to SI_ST_TAR. There's still
705 * CO_FL_ERROR on the connection but we don't want to add
706 * SI_FL_ERR back, so give up
707 */
708 if (si->state < SI_ST_CON)
709 return 0;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100710 si->flags |= SI_FL_ERR;
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200711 return 1;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100712 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200713
Christopher Faulet328ed222019-09-23 15:57:29 +0200714 /* We're already waiting to be able to send, give up */
715 if (si->wait_event.events & SUB_RETRY_SEND)
716 return 0;
717
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200718 /* we might have been called just after an asynchronous shutw */
Willy Tarreauf22758d2020-01-23 18:25:23 +0100719 if (oc->flags & CF_SHUTW)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200720 return 1;
Willy Tarreau5368d802012-08-21 18:22:06 +0200721
Christopher Faulete96993b2020-07-30 09:26:46 +0200722 /* we must wait because the mux is not installed yet */
723 if (!conn->mux)
724 return 0;
725
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200726 if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) {
727 ret = conn->mux->snd_pipe(cs, oc->pipe);
Christopher Faulet86162db2019-07-05 11:49:11 +0200728 if (ret > 0)
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200729 did_send = 1;
Willy Tarreau5368d802012-08-21 18:22:06 +0200730
Willy Tarreauafc8a222014-11-28 15:46:27 +0100731 if (!oc->pipe->data) {
732 put_pipe(oc->pipe);
733 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200734 }
735
Christopher Faulet3f76f4c2018-11-20 10:21:08 +0100736 if (oc->pipe)
737 goto end;
Willy Tarreau5368d802012-08-21 18:22:06 +0200738 }
739
740 /* At this point, the pipe is empty, but we may still have data pending
741 * in the normal buffer.
742 */
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100743 if (co_data(oc)) {
744 /* when we're here, we already know that there is no spliced
745 * data left, and that there are sendable buffered data.
746 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200747
Willy Tarreau5368d802012-08-21 18:22:06 +0200748 /* check if we want to inform the kernel that we're interested in
749 * sending more data after this call. We want this if :
750 * - we're about to close after this last send and want to merge
751 * the ongoing FIN with the last segment.
752 * - we know we can't send everything at once and must get back
753 * here because of unaligned data
754 * - there is still a finite amount of data to forward
755 * The test is arranged so that the most common case does only 2
756 * tests.
757 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100758 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200759
Willy Tarreauafc8a222014-11-28 15:46:27 +0100760 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
761 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
Willy Tarreau8945bb62020-06-19 17:07:06 +0200762 (oc->flags & CF_EXPECT_MORE) ||
Christopher Faulet9e3dc832020-07-22 16:28:44 +0200763 (IS_HTX_STRM(si_strm(si)) &&
764 (!(oc->flags & (CF_EOI|CF_SHUTR)) && htx_expect_more(htxbuf(&oc->buf)))))) ||
Willy Tarreauecd2e152017-11-07 15:07:25 +0100765 ((oc->flags & CF_ISRESP) &&
766 ((oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW)) == (CF_AUTO_CLOSE|CF_SHUTW_NOW))))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100767 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200768
Willy Tarreauafc8a222014-11-28 15:46:27 +0100769 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100770 send_flag |= CO_SFL_STREAMER;
771
Christopher Faulet5bf85852021-05-21 13:46:14 +0200772 if ((si->flags & SI_FL_L7_RETRY) && !b_data(&si->l7_buffer)) {
773 struct stream *s = si_strm(si);
774 /* If we want to be able to do L7 retries, copy
775 * the data we're about to send, so that we are able
776 * to resend them if needed
777 */
778 /* Try to allocate a buffer if we had none.
779 * If it fails, the next test will just
780 * disable the l7 retries by setting
781 * l7_conn_retries to 0.
782 */
783 if (!s->txn || (s->txn->req.msg_state != HTTP_MSG_DONE))
784 si->flags &= ~SI_FL_L7_RETRY;
785 else {
Christopher Fauletd6bbe822021-06-11 15:55:56 +0200786 if (b_alloc(&si->l7_buffer) == NULL)
Christopher Faulet5bf85852021-05-21 13:46:14 +0200787 si->flags &= ~SI_FL_L7_RETRY;
788 else {
789 memcpy(b_orig(&si->l7_buffer),
790 b_orig(&oc->buf),
791 b_size(&oc->buf));
792 si->l7_buffer.head = co_data(oc);
793 b_add(&si->l7_buffer, co_data(oc));
794 }
795
796 }
797 }
798
Olivier Houcharded0f2072018-08-16 15:41:52 +0200799 ret = cs->conn->mux->snd_buf(cs, &oc->buf, co_data(oc), send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800800 if (ret > 0) {
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200801 did_send = 1;
Willy Tarreau77e478c2018-06-19 07:03:14 +0200802 co_set_data(oc, co_data(oc) - ret);
Willy Tarreaudeccd112018-06-14 18:38:55 +0200803 c_realign_if_empty(oc);
804
805 if (!co_data(oc)) {
Godbache68e02d2013-10-11 15:48:29 +0800806 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100807 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800808 }
Godbache68e02d2013-10-11 15:48:29 +0800809 /* if some data remain in the buffer, it's only because the
810 * system buffers are full, we will try next time.
811 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200812 }
Godbache68e02d2013-10-11 15:48:29 +0800813 }
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100814
Willy Tarreauf6975aa2018-11-15 14:33:05 +0100815 end:
Christopher Faulet86162db2019-07-05 11:49:11 +0200816 if (did_send) {
817 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
818 if (si->state == SI_ST_CON)
819 si->state = SI_ST_RDY;
Christopher Faulet037b3eb2019-07-05 13:44:29 +0200820
821 si_rx_room_rdy(si_opposite(si));
Christopher Faulet86162db2019-07-05 11:49:11 +0200822 }
823
Willy Tarreaub3666ef2022-03-17 16:19:09 +0100824 if (cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
Christopher Faulet86162db2019-07-05 11:49:11 +0200825 si->flags |= SI_FL_ERR;
826 return 1;
827 }
828
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200829 /* 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 +0100830 if (!channel_is_empty(oc))
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100831 conn->mux->subscribe(cs, SUB_RETRY_SEND, &si->wait_event);
Olivier Houchardf6535282018-08-31 17:29:12 +0200832 return did_send;
Willy Tarreau5368d802012-08-21 18:22:06 +0200833}
834
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100835/* This is the ->process() function for any stream-interface's wait_event task.
836 * It's assigned during the stream-interface's initialization, for any type of
837 * stream interface. Thus it is always safe to perform a tasklet_wakeup() on a
838 * stream interface, as the presence of the CS is checked there.
839 */
Willy Tarreau144f84a2021-03-02 16:09:26 +0100840struct task *si_cs_io_cb(struct task *t, void *ctx, unsigned int state)
Olivier Houchard91894cb2018-08-02 18:06:28 +0200841{
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200842 struct stream_interface *si = ctx;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200843 struct conn_stream *cs = objt_cs(si->end);
Olivier Houchardf6535282018-08-31 17:29:12 +0200844 int ret = 0;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200845
846 if (!cs)
Willy Tarreau74163142021-03-13 11:30:19 +0100847 return t;
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100848
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100849 if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchardf6535282018-08-31 17:29:12 +0200850 ret = si_cs_send(cs);
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100851 if (!(si->wait_event.events & SUB_RETRY_RECV))
Olivier Houchardf6535282018-08-31 17:29:12 +0200852 ret |= si_cs_recv(cs);
853 if (ret != 0)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200854 si_cs_process(cs);
Olivier Houchardf6535282018-08-31 17:29:12 +0200855
Willy Tarreaua64c7032019-08-01 14:17:02 +0200856 stream_release_buffers(si_strm(si));
Willy Tarreau74163142021-03-13 11:30:19 +0100857 return t;
Olivier Houchard91894cb2018-08-02 18:06:28 +0200858}
859
Willy Tarreau25f13102015-09-24 11:32:22 +0200860/* This function is designed to be called from within the stream handler to
Willy Tarreau236c4292019-06-06 08:19:20 +0200861 * update the input channel's expiration timer and the stream interface's
862 * Rx flags based on the channel's flags. It needs to be called only once
863 * after the channel's flags have settled down, and before they are cleared,
864 * though it doesn't harm to call it as often as desired (it just slightly
865 * hurts performance). It must not be called from outside of the stream
866 * handler, as what it does will be used to compute the stream task's
867 * expiration.
Willy Tarreau25f13102015-09-24 11:32:22 +0200868 */
Willy Tarreau236c4292019-06-06 08:19:20 +0200869void si_update_rx(struct stream_interface *si)
Willy Tarreau25f13102015-09-24 11:32:22 +0200870{
871 struct channel *ic = si_ic(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200872
Willy Tarreau236c4292019-06-06 08:19:20 +0200873 if (ic->flags & CF_SHUTR) {
874 si_rx_shut_blk(si);
875 return;
876 }
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100877
Willy Tarreau236c4292019-06-06 08:19:20 +0200878 /* Read not closed, update FD status and timeout for reads */
879 if (ic->flags & CF_DONT_READ)
880 si_rx_chan_blk(si);
881 else
882 si_rx_chan_rdy(si);
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100883
Christopher Fauletdce06672021-10-29 14:55:59 +0200884 if (!channel_is_empty(ic) || !channel_may_recv(ic)) {
Willy Tarreau236c4292019-06-06 08:19:20 +0200885 /* stop reading, imposed by channel's policy or contents */
886 si_rx_room_blk(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200887 }
Willy Tarreau236c4292019-06-06 08:19:20 +0200888 else {
889 /* (re)start reading and update timeout. Note: we don't recompute the timeout
Thayne McCombs8f0cc5c2021-01-07 21:35:52 -0700890 * every time we get here, otherwise it would risk never to expire. We only
Willy Tarreau236c4292019-06-06 08:19:20 +0200891 * update it if is was not yet set. The stream socket handler will already
892 * have updated it if there has been a completed I/O.
893 */
894 si_rx_room_rdy(si);
895 }
896 if (si->flags & SI_FL_RXBLK_ANY & ~SI_FL_RX_WAIT_EP)
897 ic->rex = TICK_ETERNITY;
898 else if (!(ic->flags & CF_READ_NOEXP) && !tick_isset(ic->rex))
899 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreau25f13102015-09-24 11:32:22 +0200900
Willy Tarreau236c4292019-06-06 08:19:20 +0200901 si_chk_rcv(si);
902}
903
904/* This function is designed to be called from within the stream handler to
905 * update the output channel's expiration timer and the stream interface's
906 * Tx flags based on the channel's flags. It needs to be called only once
907 * after the channel's flags have settled down, and before they are cleared,
908 * though it doesn't harm to call it as often as desired (it just slightly
909 * hurts performance). It must not be called from outside of the stream
910 * handler, as what it does will be used to compute the stream task's
911 * expiration.
912 */
913void si_update_tx(struct stream_interface *si)
914{
915 struct channel *oc = si_oc(si);
916 struct channel *ic = si_ic(si);
917
918 if (oc->flags & CF_SHUTW)
919 return;
920
921 /* Write not closed, update FD status and timeout for writes */
922 if (channel_is_empty(oc)) {
923 /* stop writing */
924 if (!(si->flags & SI_FL_WAIT_DATA)) {
925 if ((oc->flags & CF_SHUTW_NOW) == 0)
926 si->flags |= SI_FL_WAIT_DATA;
927 oc->wex = TICK_ETERNITY;
Willy Tarreau25f13102015-09-24 11:32:22 +0200928 }
Willy Tarreau236c4292019-06-06 08:19:20 +0200929 return;
930 }
931
932 /* (re)start writing and update timeout. Note: we don't recompute the timeout
Thayne McCombs8f0cc5c2021-01-07 21:35:52 -0700933 * every time we get here, otherwise it would risk never to expire. We only
Willy Tarreau236c4292019-06-06 08:19:20 +0200934 * update it if is was not yet set. The stream socket handler will already
935 * have updated it if there has been a completed I/O.
936 */
937 si->flags &= ~SI_FL_WAIT_DATA;
938 if (!tick_isset(oc->wex)) {
939 oc->wex = tick_add_ifset(now_ms, oc->wto);
940 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
941 /* Note: depending on the protocol, we don't know if we're waiting
942 * for incoming data or not. So in order to prevent the socket from
943 * expiring read timeouts during writes, we refresh the read timeout,
944 * except if it was already infinite or if we have explicitly setup
945 * independent streams.
Willy Tarreau25f13102015-09-24 11:32:22 +0200946 */
Willy Tarreau236c4292019-06-06 08:19:20 +0200947 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreau25f13102015-09-24 11:32:22 +0200948 }
949 }
950}
951
Willy Tarreau3b285d72019-06-06 08:20:17 +0200952/* perform a synchronous send() for the stream interface. The CF_WRITE_NULL and
953 * CF_WRITE_PARTIAL flags are cleared prior to the attempt, and will possibly
954 * be updated in case of success.
955 */
956void si_sync_send(struct stream_interface *si)
957{
958 struct channel *oc = si_oc(si);
959 struct conn_stream *cs;
960
961 oc->flags &= ~(CF_WRITE_NULL|CF_WRITE_PARTIAL);
962
963 if (oc->flags & CF_SHUTW)
964 return;
965
966 if (channel_is_empty(oc))
967 return;
968
969 if (!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST))
970 return;
971
972 cs = objt_cs(si->end);
Olivier Houchard8af03b32020-01-22 17:34:54 +0100973 if (!cs || !cs->conn->mux)
Willy Tarreau3b285d72019-06-06 08:20:17 +0200974 return;
975
Christopher Faulet037b3eb2019-07-05 13:44:29 +0200976 si_cs_send(cs);
Willy Tarreau3b285d72019-06-06 08:20:17 +0200977}
978
Willy Tarreaud14844a2018-11-08 18:15:29 +0100979/* Updates at once the channel flags, and timers of both stream interfaces of a
980 * same stream, to complete the work after the analysers, then updates the data
981 * layer below. This will ensure that any synchronous update performed at the
982 * data layer will be reflected in the channel flags and/or stream-interface.
Willy Tarreau829bd472019-06-06 09:17:23 +0200983 * Note that this does not change the stream interface's current state, though
984 * it updates the previous state to the current one.
Willy Tarreaud14844a2018-11-08 18:15:29 +0100985 */
986void si_update_both(struct stream_interface *si_f, struct stream_interface *si_b)
987{
988 struct channel *req = si_ic(si_f);
989 struct channel *res = si_oc(si_f);
Willy Tarreaud14844a2018-11-08 18:15:29 +0100990
991 req->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
992 res->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
993
Willy Tarreaud14844a2018-11-08 18:15:29 +0100994 si_f->prev_state = si_f->state;
995 si_b->prev_state = si_b->state;
996
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100997 /* let's recompute both sides states */
Willy Tarreau4f283fa2019-06-05 14:34:03 +0200998 if (si_state_in(si_f->state, SI_SB_RDY|SI_SB_EST))
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100999 si_update(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +01001000
Willy Tarreau4f283fa2019-06-05 14:34:03 +02001001 if (si_state_in(si_b->state, SI_SB_RDY|SI_SB_EST))
Willy Tarreau14bfe9a2018-12-19 15:19:27 +01001002 si_update(si_b);
Willy Tarreaubf89ff32018-11-09 14:59:25 +01001003
1004 /* stream ints are processed outside of process_stream() and must be
1005 * handled at the latest moment.
1006 */
1007 if (obj_type(si_f->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +01001008 ((si_rx_endp_ready(si_f) && !si_rx_blocked(si_f)) ||
1009 (si_tx_endp_ready(si_f) && !si_tx_blocked(si_f))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +01001010 appctx_wakeup(si_appctx(si_f));
Willy Tarreaud14844a2018-11-08 18:15:29 +01001011
Willy Tarreaubf89ff32018-11-09 14:59:25 +01001012 if (obj_type(si_b->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +01001013 ((si_rx_endp_ready(si_b) && !si_rx_blocked(si_b)) ||
1014 (si_tx_endp_ready(si_b) && !si_tx_blocked(si_b))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +01001015 appctx_wakeup(si_appctx(si_b));
Willy Tarreaud14844a2018-11-08 18:15:29 +01001016}
1017
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001018/*
1019 * This function performs a shutdown-read on a stream interface attached to
1020 * a connection in a connected or init state (it does nothing for other
1021 * states). It either shuts the read side or marks itself as closed. The buffer
1022 * flags are updated to reflect the new state. If the stream interface has
1023 * SI_FL_NOHALF, we also forward the close to the write side. If a control
1024 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +02001025 * descriptors are then shutdown or closed accordingly. The function
1026 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001027 */
Willy Tarreau6fe15412013-09-29 15:16:03 +02001028static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001029{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001030 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001031 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001032
Willy Tarreauabb5d422018-11-14 16:58:52 +01001033 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001034 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +02001035 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001036 ic->flags |= CF_SHUTR;
1037 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001038
Willy Tarreau4f283fa2019-06-05 14:34:03 +02001039 if (!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST))
Willy Tarreau6fe15412013-09-29 15:16:03 +02001040 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001041
Willy Tarreau51d0a7e2019-01-31 19:09:59 +01001042 if (si->flags & SI_FL_KILL_CONN)
1043 cs->flags |= CS_FL_KILL_CONN;
1044
Willy Tarreau2bb4a962014-11-28 11:11:05 +01001045 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaua553ae92017-10-05 18:52:17 +02001046 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001047 si->state = SI_ST_DIS;
1048 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001049 }
Christopher Faulet08efeba2023-02-08 16:18:48 +01001050 else if (si_cond_forward_shutw(si)) {
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001051 /* we want to immediately forward this close to the write side */
1052 return stream_int_shutw_conn(si);
1053 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001054}
1055
1056/*
1057 * This function performs a shutdown-write on a stream interface attached to
1058 * a connection in a connected or init state (it does nothing for other
1059 * states). It either shuts the write side or marks itself as closed. The
1060 * buffer flags are updated to reflect the new state. It does also close
1061 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +01001062 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001063 */
Willy Tarreau6fe15412013-09-29 15:16:03 +02001064static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001065{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001066 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001067 struct channel *ic = si_ic(si);
1068 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001069
Willy Tarreauafc8a222014-11-28 15:46:27 +01001070 oc->flags &= ~CF_SHUTW_NOW;
1071 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +02001072 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001073 oc->flags |= CF_SHUTW;
1074 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001075 si_done_get(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001076
Hongbo Longe39683c2017-03-10 18:41:51 +01001077 if (tick_isset(si->hcto)) {
1078 ic->rto = si->hcto;
1079 ic->rex = tick_add(now_ms, ic->rto);
1080 }
1081
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001082 switch (si->state) {
Willy Tarreau4f283fa2019-06-05 14:34:03 +02001083 case SI_ST_RDY:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001084 case SI_ST_EST:
1085 /* we have to shut before closing, otherwise some short messages
1086 * may never leave the system, especially when there are remaining
1087 * unread data in the socket input buffer, or when nolinger is set.
1088 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1089 * no risk so we close both sides immediately.
1090 */
Willy Tarreau51d0a7e2019-01-31 19:09:59 +01001091 if (si->flags & SI_FL_KILL_CONN)
1092 cs->flags |= CS_FL_KILL_CONN;
1093
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001094 if (si->flags & SI_FL_ERR) {
Ilya Shipitsin6fb0f212020-04-02 15:25:26 +05001095 /* quick close, the socket is already shut anyway */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001096 }
1097 else if (si->flags & SI_FL_NOLINGER) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001098 /* unclean data-layer shutdown, typically an aborted request
1099 * or a forwarded shutdown from a client to a server due to
1100 * option abortonclose. No need for the TLS layer to try to
1101 * emit a shutdown message.
1102 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001103 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001104 }
1105 else {
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001106 /* clean data-layer shutdown. This only happens on the
1107 * frontend side, or on the backend side when forwarding
1108 * a client close in TCP mode or in HTTP TUNNEL mode
1109 * while option abortonclose is set. We want the TLS
1110 * layer to try to signal it to the peer before we close.
1111 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001112 cs_shutw(cs, CS_SHW_NORMAL);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001113
Willy Tarreaua5ea7512020-12-11 10:24:05 +01001114 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ)))
Willy Tarreaua553ae92017-10-05 18:52:17 +02001115 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001116 }
1117
1118 /* fall through */
1119 case SI_ST_CON:
1120 /* we may have to close a pending connection, and mark the
1121 * response buffer as shutr
1122 */
Willy Tarreau51d0a7e2019-01-31 19:09:59 +01001123 if (si->flags & SI_FL_KILL_CONN)
1124 cs->flags |= CS_FL_KILL_CONN;
Willy Tarreaua553ae92017-10-05 18:52:17 +02001125 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001126 /* fall through */
1127 case SI_ST_CER:
1128 case SI_ST_QUE:
1129 case SI_ST_TAR:
1130 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +02001131 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001132 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +01001133 si->flags &= ~SI_FL_NOLINGER;
1134 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001135 ic->flags |= CF_SHUTR;
1136 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001137 si->exp = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +02001138 }
1139}
1140
Willy Tarreau46a8d922012-08-20 12:38:36 +02001141/* This function is used for inter-stream-interface calls. It is called by the
1142 * consumer to inform the producer side that it may be interested in checking
1143 * for free space in the buffer. Note that it intentionally does not update
1144 * timeouts, so that we can still check them later at wake-up. This function is
1145 * dedicated to connection-based stream interfaces.
1146 */
Willy Tarreauc5788912012-08-24 18:12:41 +02001147static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +02001148{
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001149 /* (re)start reading */
Willy Tarreau4f283fa2019-06-05 14:34:03 +02001150 if (si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST))
Willy Tarreau3c39a7d2019-06-14 14:42:29 +02001151 tasklet_wakeup(si->wait_event.tasklet);
Willy Tarreau46a8d922012-08-20 12:38:36 +02001152}
1153
1154
Willy Tarreaude5722c2012-08-20 15:01:10 +02001155/* This function is used for inter-stream-interface calls. It is called by the
1156 * producer to inform the consumer side that it may be interested in checking
1157 * for data in the buffer. Note that it intentionally does not update timeouts,
1158 * so that we can still check them later at wake-up.
1159 */
Willy Tarreauc5788912012-08-24 18:12:41 +02001160static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001161{
Willy Tarreauafc8a222014-11-28 15:46:27 +01001162 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001163 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001164
Willy Tarreau0ceb3f22022-04-29 15:04:41 +02001165 if (unlikely(!si_state_in(si->state, SI_SB_RDY|SI_SB_EST) ||
Olivier Houchardb2fc04e2019-04-11 13:56:26 +02001166 (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +02001167 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001168
Willy Tarreauafc8a222014-11-28 15:46:27 +01001169 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001170 return;
1171
Willy Tarreauafc8a222014-11-28 15:46:27 +01001172 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +01001173 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001174 return;
1175
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001176 if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchard31f04e42018-10-22 16:01:09 +02001177 si_cs_send(cs);
Willy Tarreau33a09a52018-10-25 13:49:49 +02001178
Willy Tarreaub3666ef2022-03-17 16:19:09 +01001179 if (cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING) || si_is_conn_error(si)) {
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001180 /* Write error on the file descriptor */
Olivier Houchardc31e2cb2019-06-24 16:08:08 +02001181 if (si->state >= SI_ST_CON)
1182 si->flags |= SI_FL_ERR;
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001183 goto out_wakeup;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001184 }
1185
1186 /* OK, so now we know that some data might have been sent, and that we may
1187 * have to poll first. We have to do that too if the buffer is not empty.
1188 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001189 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001190 /* the connection is established but we can't write. Either the
1191 * buffer is empty, or we just refrain from sending because the
1192 * ->o limit was reached. Maybe we just wrote the last
1193 * chunk and need to close.
1194 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001195 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001196 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreau4f283fa2019-06-05 14:34:03 +02001197 si_state_in(si->state, SI_SB_RDY|SI_SB_EST)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001198 si_shutw(si);
1199 goto out_wakeup;
1200 }
1201
Willy Tarreauafc8a222014-11-28 15:46:27 +01001202 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001203 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001204 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001205 }
1206 else {
1207 /* Otherwise there are remaining data to be sent in the buffer,
1208 * which means we have to poll before doing so.
1209 */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001210 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001211 if (!tick_isset(oc->wex))
1212 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001213 }
1214
Willy Tarreauafc8a222014-11-28 15:46:27 +01001215 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1216 struct channel *ic = si_ic(si);
1217
Willy Tarreaude5722c2012-08-20 15:01:10 +02001218 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001219 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1220 !channel_is_empty(oc))
1221 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001222
Willy Tarreauafc8a222014-11-28 15:46:27 +01001223 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001224 /* Note: to prevent the client from expiring read timeouts
1225 * during writes, we refresh it. We only do this if the
1226 * interface is not configured for "independent streams",
1227 * because for some applications it's better not to do this,
1228 * for instance when continuously exchanging small amounts
1229 * of data which can full the socket buffers long before a
1230 * write timeout is detected.
1231 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001232 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001233 }
1234 }
1235
1236 /* in case of special condition (error, shutdown, end of write...), we
1237 * have to notify the task.
1238 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001239 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1240 ((oc->flags & CF_WAKE_WRITE) &&
1241 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreau7ab22adb2019-06-05 14:53:22 +02001242 !si_state_in(si->state, SI_SB_EST))))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001243 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001244 if (!(si->flags & SI_FL_DONT_WAKE))
1245 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001246 }
1247}
1248
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001249/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001250 * This is the callback which is called by the connection layer to receive data
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001251 * into the buffer from the connection. It iterates over the mux layer's
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001252 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001253 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +02001254int si_cs_recv(struct conn_stream *cs)
Willy Tarreauce323de2012-08-20 21:41:06 +02001255{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001256 struct connection *conn = cs->conn;
1257 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001258 struct channel *ic = si_ic(si);
Olivier Houchardf6535282018-08-31 17:29:12 +02001259 int ret, max, cur_read = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001260 int read_poll = MAX_READ_POLL_LOOPS;
Christopher Fauletc6618d62018-10-11 15:56:04 +02001261 int flags = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001262
Christopher Faulet04400bc2019-10-25 10:21:01 +02001263 /* If not established yet, do nothing. */
1264 if (si->state != SI_ST_EST)
1265 return 0;
1266
Olivier Houchardf6535282018-08-31 17:29:12 +02001267 /* If another call to si_cs_recv() failed, and we subscribed to
1268 * recv events already, give up now.
1269 */
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001270 if (si->wait_event.events & SUB_RETRY_RECV)
Olivier Houchardf6535282018-08-31 17:29:12 +02001271 return 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001272
Willy Tarreauce323de2012-08-20 21:41:06 +02001273 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001274 if (ic->flags & CF_SHUTR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001275 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001276
Christopher Faulete96993b2020-07-30 09:26:46 +02001277 /* we must wait because the mux is not installed yet */
1278 if (!conn->mux)
1279 return 0;
1280
Willy Tarreau54e917c2017-08-30 07:35:35 +02001281 /* stop here if we reached the end of data */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001282 if (cs->flags & CS_FL_EOS)
Christopher Faulet36b536d2019-11-20 11:56:33 +01001283 goto end_recv;
Willy Tarreau54e917c2017-08-30 07:35:35 +02001284
Christopher Fauletf061e422018-12-07 14:51:20 +01001285 /* stop immediately on errors. Note that we DON'T want to stop on
1286 * POLL_ERR, as the poller might report a write error while there
1287 * are still data available in the recv buffer. This typically
1288 * happens when we send too large a request to a backend server
1289 * which rejects it before reading it all.
1290 */
1291 if (!(cs->flags & CS_FL_RCV_MORE)) {
1292 if (!conn_xprt_ready(conn))
1293 return 0;
Willy Tarreaub3666ef2022-03-17 16:19:09 +01001294 if (cs->flags & CS_FL_ERROR)
Christopher Faulet36b536d2019-11-20 11:56:33 +01001295 goto end_recv;
Christopher Fauletf061e422018-12-07 14:51:20 +01001296 }
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001297
Willy Tarreau7ab99a32018-12-18 09:15:43 +01001298 /* prepare to detect if the mux needs more room */
1299 cs->flags &= ~CS_FL_WANT_ROOM;
1300
Willy Tarreau77e478c2018-06-19 07:03:14 +02001301 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !co_data(ic) &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001302 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001303 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001304 /* The buffer was empty and nothing was transferred for more
1305 * than one second. This was caused by a pause and not by
1306 * congestion. Reset any streaming mode to reduce latency.
1307 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001308 ic->xfer_small = 0;
1309 ic->xfer_large = 0;
1310 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001311 }
1312
Willy Tarreau96199b12012-08-24 00:46:52 +02001313 /* First, let's see if we may splice data across the channel without
1314 * using a buffer.
1315 */
Willy Tarreau17ccd1a2020-01-17 16:19:34 +01001316 if (cs->flags & CS_FL_MAY_SPLICE &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001317 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1318 ic->flags & CF_KERN_SPLICING) {
Willy Tarreaud760eec2018-07-10 09:50:25 +02001319 if (c_data(ic)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001320 /* We're embarrassed, there are already data pending in
1321 * the buffer and we don't want to have them at two
1322 * locations at a time. Let's indicate we need some
1323 * place and ask the consumer to hurry.
1324 */
Christopher Fauletc6618d62018-10-11 15:56:04 +02001325 flags |= CO_RFL_BUF_FLUSH;
Willy Tarreau96199b12012-08-24 00:46:52 +02001326 goto abort_splice;
1327 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001328
Willy Tarreauafc8a222014-11-28 15:46:27 +01001329 if (unlikely(ic->pipe == NULL)) {
1330 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1331 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001332 goto abort_splice;
1333 }
1334 }
1335
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001336 ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001337 if (ret < 0) {
1338 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001339 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001340 goto abort_splice;
1341 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001342
Willy Tarreau96199b12012-08-24 00:46:52 +02001343 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001344 if (ic->to_forward != CHN_INFINITE_FORWARD)
1345 ic->to_forward -= ret;
1346 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001347 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001348 ic->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +02001349 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001350
Willy Tarreaub3666ef2022-03-17 16:19:09 +01001351 if (cs->flags & (CS_FL_EOS|CS_FL_ERROR))
Christopher Faulet36b536d2019-11-20 11:56:33 +01001352 goto end_recv;
Willy Tarreau96199b12012-08-24 00:46:52 +02001353
Willy Tarreau61d39a02013-07-18 21:49:32 +02001354 if (conn->flags & CO_FL_WAIT_ROOM) {
1355 /* the pipe is full or we have read enough data that it
1356 * could soon be full. Let's stop before needing to poll.
1357 */
Willy Tarreaudb398432018-11-15 11:08:52 +01001358 si_rx_room_blk(si);
Willy Tarreauffb12052018-11-15 16:06:02 +01001359 goto done_recv;
Willy Tarreau61d39a02013-07-18 21:49:32 +02001360 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001361
Willy Tarreauce323de2012-08-20 21:41:06 +02001362 /* splice not possible (anymore), let's go on on standard copy */
1363 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001364
1365 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001366 if (ic->pipe && unlikely(!ic->pipe->data)) {
1367 put_pipe(ic->pipe);
1368 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001369 }
1370
Willy Tarreau17ccd1a2020-01-17 16:19:34 +01001371 if (ic->pipe && ic->to_forward && !(flags & CO_RFL_BUF_FLUSH) && cs->flags & CS_FL_MAY_SPLICE) {
Willy Tarreauc640ef12019-12-03 18:13:04 +01001372 /* don't break splicing by reading, but still call rcv_buf()
1373 * to pass the flag.
1374 */
1375 goto done_recv;
1376 }
1377
Christopher Fauleta73e59b2016-12-09 17:30:18 +01001378 /* now we'll need a input buffer for the stream */
Willy Tarreau581abd32018-10-25 10:21:41 +02001379 if (!si_alloc_ibuf(si, &(si_strm(si)->buffer_wait)))
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001380 goto end_recv;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001381
Christopher Faulet8d521422021-09-21 15:22:12 +02001382 /* For an HTX stream, if the buffer is stuck (no output data with some
1383 * input data) and if the HTX message is fragmented or if its free space
1384 * wraps, we force an HTX deframentation. It is a way to have a
1385 * contiguous free space nad to let the mux to copy as much data as
1386 * possible.
1387 *
1388 * NOTE: A possible optim may be to let the mux decides if defrag is
1389 * required or not, depending on amount of data to be xferred.
1390 */
1391 if (IS_HTX_STRM(si_strm(si)) && !co_data(ic)) {
1392 struct htx *htx = htxbuf(&ic->buf);
1393
1394 if (htx_is_not_empty(htx) && ((htx->flags & HTX_FL_FRAGMENTED) || htx_space_wraps(htx)))
1395 htx_defrag(htxbuf(&ic->buf), NULL, 0);
1396 }
Christopher Fauletfdf5ad12021-09-21 15:14:57 +02001397
1398 /* Instruct the mux it must subscribed for read events */
1399 flags |= ((!conn_is_back(conn) && (si_strm(si)->be->options & PR_O_ABRT_CLOSE)) ? CO_RFL_KEEP_RECV : 0);
1400
Willy Tarreau61d39a02013-07-18 21:49:32 +02001401 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1402 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1403 * that if such an event is not handled above in splice, it will be handled here by
1404 * recv().
1405 */
Olivier Houchardc490efd2018-12-04 15:46:16 +01001406 while ((cs->flags & CS_FL_RCV_MORE) ||
Willy Tarreaub3666ef2022-03-17 16:19:09 +01001407 (!(conn->flags & CO_FL_HANDSHAKE) &&
Olivier Houchardc490efd2018-12-04 15:46:16 +01001408 (!(cs->flags & (CS_FL_ERROR|CS_FL_EOS))) && !(ic->flags & CF_SHUTR))) {
Christopher Fauletfdf5ad12021-09-21 15:14:57 +02001409 int cur_flags = flags;
1410
1411 /* Compute transient CO_RFL_* flags */
Christopher Faulet93a466b2021-09-21 15:50:55 +02001412 if (co_data(ic)) {
1413 cur_flags |= (CO_RFL_BUF_WET | CO_RFL_BUF_NOT_STUCK);
1414 }
Christopher Fauletfdf5ad12021-09-21 15:14:57 +02001415
Christopher Faulet4eb7d742018-10-11 15:29:21 +02001416 /* <max> may be null. This is the mux responsibility to set
1417 * CS_FL_RCV_MORE on the CS if more space is needed.
1418 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001419 max = channel_recv_max(ic);
Christopher Fauletfdf5ad12021-09-21 15:14:57 +02001420 ret = cs->conn->mux->rcv_buf(cs, &ic->buf, max, cur_flags);
Willy Tarreau674e0ad2018-12-05 13:45:41 +01001421
Christopher Faulet47545ca2021-09-23 14:17:20 +02001422 if (cs->flags & CS_FL_WANT_ROOM) {
Willy Tarreaudb398432018-11-15 11:08:52 +01001423 si_rx_room_blk(si);
Christopher Faulet47545ca2021-09-23 14:17:20 +02001424 /* Add READ_PARTIAL because some data are pending but
1425 * cannot be xferred to the channel
1426 */
1427 ic->flags |= CF_READ_PARTIAL;
1428 }
Willy Tarreau6577b482017-12-10 21:19:33 +01001429
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001430 if (ret <= 0) {
Willy Tarreau1ac5f202019-12-03 18:08:45 +01001431 /* if we refrained from reading because we asked for a
1432 * flush to satisfy rcv_pipe(), we must not subscribe
1433 * and instead report that there's not enough room
1434 * here to proceed.
1435 */
1436 if (flags & CO_RFL_BUF_FLUSH)
1437 si_rx_room_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001438 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001439 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001440
1441 cur_read += ret;
1442
1443 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001444 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001445 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001446 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1447 if (fwd > ic->to_forward)
1448 fwd = ic->to_forward;
1449 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001450 }
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001451 c_adv(ic, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001452 }
1453
Willy Tarreauafc8a222014-11-28 15:46:27 +01001454 ic->flags |= CF_READ_PARTIAL;
1455 ic->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001456
Christopher Faulet82219b52021-09-09 10:17:59 +02001457 /* End-of-input reached, we can leave. In this case, it is
1458 * important to break the loop to not block the SI because of
1459 * the channel's policies.This way, we are still able to receive
1460 * shutdowns.
1461 */
1462 if (cs->flags & CS_FL_EOI)
1463 break;
1464
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001465 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
1466 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001467 si_rx_chan_blk(si);
Willy Tarreau62dd6982017-11-18 11:26:20 +01001468 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001469 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001470
1471 /* if too many bytes were missing from last read, it means that
1472 * it's pointless trying to read again because the system does
1473 * not have them in buffers.
1474 */
1475 if (ret < max) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001476 /* if a streamer has read few data, it may be because we
1477 * have exhausted system buffers. It's not worth trying
1478 * again.
1479 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001480 if (ic->flags & CF_STREAMER) {
1481 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001482 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001483 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001484 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001485
1486 /* if we read a large block smaller than what we requested,
1487 * it's almost certain we'll never get anything more.
1488 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001489 if (ret >= global.tune.recv_enough) {
1490 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001491 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001492 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001493 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001494 }
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001495
1496 /* if we are waiting for more space, don't try to read more data
1497 * right now.
1498 */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001499 if (si_rx_blocked(si))
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001500 break;
Willy Tarreauce323de2012-08-20 21:41:06 +02001501 } /* while !flags */
1502
Willy Tarreauffb12052018-11-15 16:06:02 +01001503 done_recv:
Willy Tarreauc5890e62014-02-09 17:47:01 +01001504 if (cur_read) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001505 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001506 (cur_read <= ic->buf.size / 2)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001507 ic->xfer_large = 0;
1508 ic->xfer_small++;
1509 if (ic->xfer_small >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001510 /* we have read less than half of the buffer in
1511 * one pass, and this happened at least 3 times.
1512 * This is definitely not a streamer.
1513 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001514 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001515 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001516 else if (ic->xfer_small >= 2) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001517 /* if the buffer has been at least half full twice,
1518 * we receive faster than we send, so at least it
1519 * is not a "fast streamer".
1520 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001521 ic->flags &= ~CF_STREAMER_FAST;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001522 }
1523 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001524 else if (!(ic->flags & CF_STREAMER_FAST) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001525 (cur_read >= ic->buf.size - global.tune.maxrewrite)) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001526 /* we read a full buffer at once */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001527 ic->xfer_small = 0;
1528 ic->xfer_large++;
1529 if (ic->xfer_large >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001530 /* we call this buffer a fast streamer if it manages
1531 * to be filled in one call 3 consecutive times.
1532 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001533 ic->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001534 }
1535 }
1536 else {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001537 ic->xfer_small = 0;
1538 ic->xfer_large = 0;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001539 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001540 ic->last_read = now_ms;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001541 }
1542
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001543 end_recv:
Christopher Faulete6d8cb12019-11-20 16:42:00 +01001544 ret = (cur_read != 0);
1545
Christopher Faulet36b536d2019-11-20 11:56:33 +01001546 /* Report EOI on the channel if it was reached from the mux point of
1547 * view. */
Christopher Faulete6d8cb12019-11-20 16:42:00 +01001548 if ((cs->flags & CS_FL_EOI) && !(ic->flags & CF_EOI)) {
Christopher Faulet36b536d2019-11-20 11:56:33 +01001549 ic->flags |= (CF_EOI|CF_READ_PARTIAL);
Christopher Faulete6d8cb12019-11-20 16:42:00 +01001550 ret = 1;
1551 }
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001552
Willy Tarreaub3666ef2022-03-17 16:19:09 +01001553 if (cs->flags & CS_FL_ERROR) {
Christopher Faulet36b536d2019-11-20 11:56:33 +01001554 si->flags |= SI_FL_ERR;
Christopher Faulete6d8cb12019-11-20 16:42:00 +01001555 ret = 1;
Christopher Faulet36b536d2019-11-20 11:56:33 +01001556 }
1557 else if (cs->flags & CS_FL_EOS) {
Willy Tarreau18955db2020-01-23 16:32:24 +01001558 /* we received a shutdown */
1559 ic->flags |= CF_READ_NULL;
1560 if (ic->flags & CF_AUTO_CLOSE)
1561 channel_shutw_now(ic);
1562 stream_int_read0(si);
Christopher Faulete6d8cb12019-11-20 16:42:00 +01001563 ret = 1;
Christopher Faulet36b536d2019-11-20 11:56:33 +01001564 }
1565 else if (!si_rx_blocked(si)) {
1566 /* Subscribe to receive events if we're blocking on I/O */
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001567 conn->mux->subscribe(cs, SUB_RETRY_RECV, &si->wait_event);
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001568 si_rx_endp_done(si);
1569 } else {
1570 si_rx_endp_more(si);
Christopher Faulete6d8cb12019-11-20 16:42:00 +01001571 ret = 1;
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001572 }
Christopher Faulete6d8cb12019-11-20 16:42:00 +01001573 return ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001574}
1575
1576/*
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001577 * This function propagates a null read received on a socket-based connection.
1578 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001579 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001580 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +01001581static void stream_int_read0(struct stream_interface *si)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001582{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001583 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001584 struct channel *ic = si_ic(si);
1585 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001586
Willy Tarreauabb5d422018-11-14 16:58:52 +01001587 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001588 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001589 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001590 ic->flags |= CF_SHUTR;
1591 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001592
Willy Tarreau4f283fa2019-06-05 14:34:03 +02001593 if (!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST))
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001594 return;
1595
Willy Tarreauafc8a222014-11-28 15:46:27 +01001596 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001597 goto do_close;
1598
Christopher Faulet08efeba2023-02-08 16:18:48 +01001599 if (si_cond_forward_shutw(si)) {
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001600 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001601 /* force flag on ssl to keep stream in cache */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001602 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001603 goto do_close;
1604 }
1605
1606 /* otherwise that's just a normal read shutdown */
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001607 return;
1608
1609 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001610 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaua553ae92017-10-05 18:52:17 +02001611 cs_close(cs);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001612
Willy Tarreauafc8a222014-11-28 15:46:27 +01001613 oc->flags &= ~CF_SHUTW_NOW;
1614 oc->flags |= CF_SHUTW;
1615 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001616
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001617 si_done_get(si);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001618
Christopher Faulet04400bc2019-10-25 10:21:01 +02001619 si->state = SI_ST_DIS;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001620 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001621 return;
1622}
1623
Willy Tarreau651e1822015-09-23 20:06:13 +02001624/* Callback to be used by applet handlers upon completion. It updates the stream
1625 * (which may or may not take this opportunity to try to forward data), then
Emeric Brun2802b072017-06-30 14:11:56 +02001626 * may re-enable the applet's based on the channels and stream interface's final
Willy Tarreau651e1822015-09-23 20:06:13 +02001627 * states.
1628 */
Willy Tarreauaa977ba2015-09-25 11:45:06 +02001629void si_applet_wake_cb(struct stream_interface *si)
Willy Tarreaue5f86492015-04-19 15:16:35 +02001630{
Willy Tarreaueca572f2015-09-25 19:11:55 +02001631 struct channel *ic = si_ic(si);
1632
1633 /* If the applet wants to write and the channel is closed, it's a
1634 * broken pipe and it must be reported.
1635 */
Willy Tarreau05b9b642018-11-14 13:43:35 +01001636 if (!(si->flags & SI_FL_RX_WAIT_EP) && (ic->flags & CF_SHUTR))
Willy Tarreaueca572f2015-09-25 19:11:55 +02001637 si->flags |= SI_FL_ERR;
1638
Willy Tarreau186dcdd2018-11-16 16:18:34 +01001639 /* automatically mark the applet having data available if it reported
1640 * begin blocked by the channel.
1641 */
1642 if (si_rx_blocked(si))
1643 si_rx_endp_more(si);
1644
Willy Tarreau651e1822015-09-23 20:06:13 +02001645 /* update the stream-int, channels, and possibly wake the stream up */
1646 stream_int_notify(si);
Willy Tarreaua64c7032019-08-01 14:17:02 +02001647 stream_release_buffers(si_strm(si));
Willy Tarreaue5f86492015-04-19 15:16:35 +02001648
Willy Tarreau32742fd2018-11-14 14:07:59 +01001649 /* stream_int_notify may have passed through chk_snd and released some
1650 * RXBLK flags. Process_stream will consider those flags to wake up the
1651 * appctx but in the case the task is not in runqueue we may have to
1652 * wakeup the appctx immediately.
Emeric Brun2802b072017-06-30 14:11:56 +02001653 */
Olivier Houchard51205a12019-04-17 19:29:35 +02001654 if ((si_rx_endp_ready(si) && !si_rx_blocked(si)) ||
1655 (si_tx_endp_ready(si) && !si_tx_blocked(si)))
Willy Tarreau563cc372015-04-19 18:13:56 +02001656 appctx_wakeup(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001657}
1658
1659/*
1660 * This function performs a shutdown-read on a stream interface attached to an
1661 * applet in a connected or init state (it does nothing for other states). It
1662 * either shuts the read side or marks itself as closed. The buffer flags are
1663 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1664 * we also forward the close to the write side. The owner task is woken up if
1665 * it exists.
1666 */
1667static void stream_int_shutr_applet(struct stream_interface *si)
1668{
1669 struct channel *ic = si_ic(si);
1670
Willy Tarreauabb5d422018-11-14 16:58:52 +01001671 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001672 if (ic->flags & CF_SHUTR)
1673 return;
1674 ic->flags |= CF_SHUTR;
1675 ic->rex = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001676
Willy Tarreau828824a2015-04-19 17:20:03 +02001677 /* Note: on shutr, we don't call the applet */
1678
Willy Tarreau4f283fa2019-06-05 14:34:03 +02001679 if (!si_state_in(si->state, SI_SB_CON|SI_SB_RDY|SI_SB_EST))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001680 return;
1681
1682 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau958f0742015-09-25 20:24:26 +02001683 si_applet_release(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001684 si->state = SI_ST_DIS;
1685 si->exp = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001686 }
Christopher Faulet08efeba2023-02-08 16:18:48 +01001687 else if (si_cond_forward_shutw(si)) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001688 /* we want to immediately forward this close to the write side */
1689 return stream_int_shutw_applet(si);
1690 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001691}
1692
1693/*
1694 * This function performs a shutdown-write on a stream interface attached to an
1695 * applet in a connected or init state (it does nothing for other states). It
1696 * either shuts the write side or marks itself as closed. The buffer flags are
1697 * updated to reflect the new state. It does also close everything if the SI
1698 * was marked as being in error state. The owner task is woken up if it exists.
1699 */
1700static void stream_int_shutw_applet(struct stream_interface *si)
1701{
1702 struct channel *ic = si_ic(si);
1703 struct channel *oc = si_oc(si);
1704
1705 oc->flags &= ~CF_SHUTW_NOW;
1706 if (oc->flags & CF_SHUTW)
1707 return;
1708 oc->flags |= CF_SHUTW;
1709 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001710 si_done_get(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001711
Hongbo Longe39683c2017-03-10 18:41:51 +01001712 if (tick_isset(si->hcto)) {
1713 ic->rto = si->hcto;
1714 ic->rex = tick_add(now_ms, ic->rto);
1715 }
1716
Willy Tarreau828824a2015-04-19 17:20:03 +02001717 /* on shutw we always wake the applet up */
1718 appctx_wakeup(si_appctx(si));
1719
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001720 switch (si->state) {
Willy Tarreau4f283fa2019-06-05 14:34:03 +02001721 case SI_ST_RDY:
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001722 case SI_ST_EST:
1723 /* we have to shut before closing, otherwise some short messages
1724 * may never leave the system, especially when there are remaining
1725 * unread data in the socket input buffer, or when nolinger is set.
1726 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1727 * no risk so we close both sides immediately.
1728 */
1729 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1730 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1731 return;
1732
1733 /* fall through */
1734 case SI_ST_CON:
1735 case SI_ST_CER:
1736 case SI_ST_QUE:
1737 case SI_ST_TAR:
1738 /* Note that none of these states may happen with applets */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001739 si_applet_release(si);
Willy Tarreau958f0742015-09-25 20:24:26 +02001740 si->state = SI_ST_DIS;
Tim Duesterhus588b3142020-05-29 14:35:51 +02001741 /* fall through */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001742 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +01001743 si->flags &= ~SI_FL_NOLINGER;
1744 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001745 ic->flags |= CF_SHUTR;
1746 ic->rex = TICK_ETERNITY;
1747 si->exp = TICK_ETERNITY;
1748 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001749}
1750
1751/* chk_rcv function for applets */
1752static void stream_int_chk_rcv_applet(struct stream_interface *si)
1753{
1754 struct channel *ic = si_ic(si);
1755
1756 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1757 __FUNCTION__,
1758 si, si->state, ic->flags, si_oc(si)->flags);
1759
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001760 if (!ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001761 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001762 appctx_wakeup(si_appctx(si));
Thierry FOURNIER5bc2cbf2015-09-04 18:40:36 +02001763 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001764}
1765
1766/* chk_snd function for applets */
1767static void stream_int_chk_snd_applet(struct stream_interface *si)
1768{
1769 struct channel *oc = si_oc(si);
1770
1771 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1772 __FUNCTION__,
1773 si, si->state, si_ic(si)->flags, oc->flags);
1774
1775 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1776 return;
1777
Willy Tarreau828824a2015-04-19 17:20:03 +02001778 /* we only wake the applet up if it was waiting for some data */
1779
1780 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001781 return;
1782
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001783 if (!tick_isset(oc->wex))
1784 oc->wex = tick_add_ifset(now_ms, oc->wto);
1785
Willy Tarreau828824a2015-04-19 17:20:03 +02001786 if (!channel_is_empty(oc)) {
1787 /* (re)start sending */
1788 appctx_wakeup(si_appctx(si));
1789 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001790}
1791
Willy Tarreaudded32d2008-11-30 19:48:07 +01001792/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001793 * Local variables:
1794 * c-indent-level: 8
1795 * c-basic-offset: 8
1796 * End:
1797 */