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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
22#include <common/compat.h>
23#include <common/config.h>
24#include <common/debug.h>
25#include <common/standard.h>
26#include <common/ticks.h>
27#include <common/time.h>
28
Willy Tarreauc7e42382012-08-24 19:22:53 +020029#include <proto/channel.h>
Willy Tarreau8b117082012-08-06 15:06:49 +020030#include <proto/connection.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010031#include <proto/fd.h>
Willy Tarreau96199b12012-08-24 00:46:52 +020032#include <proto/pipe.h>
Willy Tarreau269358d2009-09-20 20:14:49 +020033#include <proto/stream_interface.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010034#include <proto/task.h>
35
Willy Tarreaufd31e532012-07-23 18:24:25 +020036#include <types/pipe.h>
37
Willy Tarreauf873d752012-05-11 17:47:17 +020038/* socket functions used when running a stream interface as a task */
Willy Tarreauf873d752012-05-11 17:47:17 +020039static void stream_int_update_embedded(struct stream_interface *si);
Willy Tarreauf873d752012-05-11 17:47:17 +020040static void stream_int_chk_rcv(struct stream_interface *si);
41static void stream_int_chk_snd(struct stream_interface *si);
Willy Tarreauc5788912012-08-24 18:12:41 +020042static void stream_int_update_conn(struct stream_interface *si);
43static void stream_int_chk_rcv_conn(struct stream_interface *si);
44static void stream_int_chk_snd_conn(struct stream_interface *si);
Willy Tarreau4aa36832012-10-02 20:07:22 +020045static void si_conn_recv_cb(struct connection *conn);
46static void si_conn_send_cb(struct connection *conn);
Willy Tarreau2396c1c2012-10-03 21:12:16 +020047static int si_conn_wake_cb(struct connection *conn);
Willy Tarreauf873d752012-05-11 17:47:17 +020048
Willy Tarreauc5788912012-08-24 18:12:41 +020049/* stream-interface operations for embedded tasks */
50struct si_ops si_embedded_ops = {
Willy Tarreau5c979a92012-05-07 17:15:39 +020051 .update = stream_int_update_embedded,
Willy Tarreau5c979a92012-05-07 17:15:39 +020052 .chk_rcv = stream_int_chk_rcv,
53 .chk_snd = stream_int_chk_snd,
Willy Tarreau5c979a92012-05-07 17:15:39 +020054};
55
Willy Tarreauc5788912012-08-24 18:12:41 +020056/* stream-interface operations for connections */
57struct si_ops si_conn_ops = {
58 .update = stream_int_update_conn,
59 .chk_rcv = stream_int_chk_rcv_conn,
60 .chk_snd = stream_int_chk_snd_conn,
61};
62
Willy Tarreau74beec32012-10-03 00:41:04 +020063struct data_cb si_conn_cb = {
Willy Tarreauc5788912012-08-24 18:12:41 +020064 .recv = si_conn_recv_cb,
65 .send = si_conn_send_cb,
Willy Tarreau4aa36832012-10-02 20:07:22 +020066 .wake = si_conn_wake_cb,
Willy Tarreauc5788912012-08-24 18:12:41 +020067};
68
Willy Tarreaucff64112008-11-03 06:26:53 +010069/*
70 * This function only has to be called once after a wakeup event in case of
71 * suspected timeout. It controls the stream interface timeouts and sets
72 * si->flags accordingly. It does NOT close anything, as this timeout may
73 * be used for any purpose. It returns 1 if the timeout fired, otherwise
74 * zero.
75 */
76int stream_int_check_timeouts(struct stream_interface *si)
77{
78 if (tick_is_expired(si->exp, now_ms)) {
79 si->flags |= SI_FL_EXP;
80 return 1;
81 }
82 return 0;
83}
84
Willy Tarreaufe3718a2008-11-30 18:14:12 +010085/* to be called only when in SI_ST_DIS with SI_FL_ERR */
Willy Tarreaucff64112008-11-03 06:26:53 +010086void stream_int_report_error(struct stream_interface *si)
87{
88 if (!si->err_type)
89 si->err_type = SI_ET_DATA_ERR;
90
Willy Tarreau03cdb7c2012-08-27 23:14:58 +020091 si->ob->flags |= CF_WRITE_ERROR;
92 si->ib->flags |= CF_READ_ERROR;
Willy Tarreaucff64112008-11-03 06:26:53 +010093}
94
95/*
Willy Tarreaudded32d2008-11-30 19:48:07 +010096 * Returns a message to the client ; the connection is shut down for read,
97 * and the request is cleared so that no server connection can be initiated.
98 * The buffer is marked for read shutdown on the other side to protect the
99 * message, and the buffer write is enabled. The message is contained in a
Willy Tarreau148d0992010-01-10 10:21:21 +0100100 * "chunk". If it is null, then an empty message is used. The reply buffer does
101 * not need to be empty before this, and its contents will not be overwritten.
102 * The primary goal of this function is to return error messages to a client.
Willy Tarreaudded32d2008-11-30 19:48:07 +0100103 */
104void stream_int_retnclose(struct stream_interface *si, const struct chunk *msg)
105{
Willy Tarreau8263d2b2012-08-28 00:06:31 +0200106 channel_auto_read(si->ib);
107 channel_abort(si->ib);
108 channel_auto_close(si->ib);
109 channel_erase(si->ib);
Willy Tarreau798e1282010-12-12 13:06:00 +0100110
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200111 bi_erase(si->ob);
Willy Tarreau148d0992010-01-10 10:21:21 +0100112 if (likely(msg && msg->len))
Willy Tarreau9dab5fc2012-05-07 11:56:55 +0200113 bo_inject(si->ob, msg->str, msg->len);
Willy Tarreaudded32d2008-11-30 19:48:07 +0100114
115 si->ob->wex = tick_add_ifset(now_ms, si->ob->wto);
Willy Tarreau8263d2b2012-08-28 00:06:31 +0200116 channel_auto_read(si->ob);
117 channel_auto_close(si->ob);
118 channel_shutr_now(si->ob);
Willy Tarreau5d881d02009-12-27 22:51:06 +0100119}
120
Willy Tarreaufb90d942009-09-05 20:57:35 +0200121/* default update function for embedded tasks, to be used at the end of the i/o handler */
Willy Tarreauf873d752012-05-11 17:47:17 +0200122static void stream_int_update_embedded(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200123{
Willy Tarreau3488e252010-08-09 16:24:56 +0200124 int old_flags = si->flags;
125
Willy Tarreaufb90d942009-09-05 20:57:35 +0200126 DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n",
127 __FUNCTION__,
128 si, si->state, si->ib->flags, si->ob->flags);
129
130 if (si->state != SI_ST_EST)
131 return;
132
Willy Tarreaub31c9712012-11-11 23:05:39 +0100133 if ((si->ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW &&
Willy Tarreau8e21bb92012-08-24 22:40:29 +0200134 channel_is_empty(si->ob))
Willy Tarreau73b013b2012-05-21 16:31:45 +0200135 si_shutw(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200136
Willy Tarreaub31c9712012-11-11 23:05:39 +0100137 if ((si->ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && !channel_full(si->ob))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200138 si->flags |= SI_FL_WAIT_DATA;
139
Willy Tarreau96fd4b52009-10-04 17:18:35 +0200140 /* we're almost sure that we need some space if the buffer is not
141 * empty, even if it's not full, because the applets can't fill it.
142 */
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200143 if ((si->ib->flags & (CF_SHUTR|CF_DONT_READ)) == 0 && !channel_is_empty(si->ib))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200144 si->flags |= SI_FL_WAIT_ROOM;
145
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200146 if (si->ob->flags & CF_WRITE_ACTIVITY) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200147 if (tick_isset(si->ob->wex))
148 si->ob->wex = tick_add_ifset(now_ms, si->ob->wto);
149 }
150
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200151 if (si->ib->flags & CF_READ_ACTIVITY ||
152 (si->ob->flags & CF_WRITE_ACTIVITY && !(si->flags & SI_FL_INDEP_STR))) {
Willy Tarreauf27b5ea2009-10-03 22:01:18 +0200153 if (tick_isset(si->ib->rex))
154 si->ib->rex = tick_add_ifset(now_ms, si->ib->rto);
155 }
156
Willy Tarreau3488e252010-08-09 16:24:56 +0200157 /* save flags to detect changes */
158 old_flags = si->flags;
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200159 if (likely((si->ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL &&
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +0200160 !channel_full(si->ob) &&
Willy Tarreau96fd4b52009-10-04 17:18:35 +0200161 (si->ob->prod->flags & SI_FL_WAIT_ROOM)))
Willy Tarreau73b013b2012-05-21 16:31:45 +0200162 si_chk_rcv(si->ob->prod);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200163
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200164 if (((si->ib->flags & CF_READ_PARTIAL) && !channel_is_empty(si->ib)) &&
Willy Tarreau3488e252010-08-09 16:24:56 +0200165 (si->ib->cons->flags & SI_FL_WAIT_DATA)) {
Willy Tarreau73b013b2012-05-21 16:31:45 +0200166 si_chk_snd(si->ib->cons);
Willy Tarreau3488e252010-08-09 16:24:56 +0200167 /* check if the consumer has freed some space */
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +0200168 if (!channel_full(si->ib))
Willy Tarreau3488e252010-08-09 16:24:56 +0200169 si->flags &= ~SI_FL_WAIT_ROOM;
170 }
Willy Tarreaufb90d942009-09-05 20:57:35 +0200171
172 /* Note that we're trying to wake up in two conditions here :
173 * - special event, which needs the holder task attention
174 * - status indicating that the applet can go on working. This
175 * is rather hard because we might be blocking on output and
176 * don't want to wake up on input and vice-versa. The idea is
Willy Tarreau3488e252010-08-09 16:24:56 +0200177 * to only rely on the changes the chk_* might have performed.
Willy Tarreaufb90d942009-09-05 20:57:35 +0200178 */
179 if (/* check stream interface changes */
Willy Tarreau3488e252010-08-09 16:24:56 +0200180 ((old_flags & ~si->flags) & (SI_FL_WAIT_ROOM|SI_FL_WAIT_DATA)) ||
181
182 /* changes on the production side */
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200183 (si->ib->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
Willy Tarreau3488e252010-08-09 16:24:56 +0200184 si->state != SI_ST_EST ||
185 (si->flags & SI_FL_ERR) ||
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200186 ((si->ib->flags & CF_READ_PARTIAL) &&
Willy Tarreau3488e252010-08-09 16:24:56 +0200187 (!si->ib->to_forward || si->ib->cons->state != SI_ST_EST)) ||
188
189 /* changes on the consumption side */
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200190 (si->ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
191 ((si->ob->flags & CF_WRITE_ACTIVITY) &&
192 ((si->ob->flags & CF_SHUTW) ||
Willy Tarreau3488e252010-08-09 16:24:56 +0200193 si->ob->prod->state != SI_ST_EST ||
Willy Tarreau8e21bb92012-08-24 22:40:29 +0200194 (channel_is_empty(si->ob) && !si->ob->to_forward)))) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200195 if (!(si->flags & SI_FL_DONT_WAKE) && si->owner)
196 task_wakeup(si->owner, TASK_WOKEN_IO);
197 }
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200198 if (si->ib->flags & CF_READ_ACTIVITY)
199 si->ib->flags &= ~CF_READ_DONTWAIT;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200200}
201
Willy Tarreau4a36b562012-08-06 19:31:45 +0200202/*
203 * This function performs a shutdown-read on a stream interface in a connected
204 * or init state (it does nothing for other states). It either shuts the read
205 * side or marks itself as closed. The buffer flags are updated to reflect the
206 * new state. If the stream interface has SI_FL_NOHALF, we also forward the
207 * close to the write side. If a control layer is defined, then it is supposed
208 * to be a socket layer and file descriptors are then shutdown or closed
209 * accordingly. If no control layer is defined, then the SI is supposed to be
210 * an embedded one and the owner task is woken up if it exists. The function
211 * does not disable polling on the FD by itself, it returns non-zero instead
212 * if the caller needs to do so (except when the FD is deleted where this is
213 * implicit).
214 */
215int stream_int_shutr(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200216{
Willy Tarreauf2943dc2012-10-26 20:10:28 +0200217 struct connection *conn = si->conn;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200218
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200219 si->ib->flags &= ~CF_SHUTR_NOW;
220 if (si->ib->flags & CF_SHUTR)
Willy Tarreau4a36b562012-08-06 19:31:45 +0200221 return 0;
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200222 si->ib->flags |= CF_SHUTR;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200223 si->ib->rex = TICK_ETERNITY;
224 si->flags &= ~SI_FL_WAIT_ROOM;
225
226 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau4a36b562012-08-06 19:31:45 +0200227 return 0;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200228
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200229 if (si->ob->flags & CF_SHUTW) {
Willy Tarreau2b199c92012-11-23 17:32:21 +0100230 conn_full_close(si->conn);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200231 si->state = SI_ST_DIS;
232 si->exp = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200233
Willy Tarreaud8ccffe2010-09-07 16:16:50 +0200234 if (si->release)
235 si->release(si);
236 }
Willy Tarreau4a36b562012-08-06 19:31:45 +0200237 else if (si->flags & SI_FL_NOHALF) {
238 /* we want to immediately forward this close to the write side */
239 return stream_int_shutw(si);
240 }
241 else if (conn->ctrl) {
242 /* we want the caller to disable polling on this FD */
243 return 1;
244 }
Willy Tarreau0bd05ea2010-07-02 11:18:03 +0200245
Willy Tarreau4a36b562012-08-06 19:31:45 +0200246 /* note that if the task exists, it must unregister itself once it runs */
247 if (!conn->ctrl && !(si->flags & SI_FL_DONT_WAKE) && si->owner)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200248 task_wakeup(si->owner, TASK_WOKEN_IO);
Willy Tarreau4a36b562012-08-06 19:31:45 +0200249 return 0;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200250}
251
Willy Tarreau4a36b562012-08-06 19:31:45 +0200252/*
253 * This function performs a shutdown-write on a stream interface in a connected or
254 * init state (it does nothing for other states). It either shuts the write side
255 * or marks itself as closed. The buffer flags are updated to reflect the new state.
256 * It does also close everything if the SI was marked as being in error state. If
257 * there is a data-layer shutdown, it is called. If a control layer is defined, then
258 * it is supposed to be a socket layer and file descriptors are then shutdown or
259 * closed accordingly. If no control layer is defined, then the SI is supposed to
260 * be an embedded one and the owner task is woken up if it exists. The function
261 * does not disable polling on the FD by itself, it returns non-zero instead if
262 * the caller needs to do so (except when the FD is deleted where this is implicit).
263 */
264int stream_int_shutw(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200265{
Willy Tarreauf2943dc2012-10-26 20:10:28 +0200266 struct connection *conn = si->conn;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200267
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200268 si->ob->flags &= ~CF_SHUTW_NOW;
269 if (si->ob->flags & CF_SHUTW)
Willy Tarreau4a36b562012-08-06 19:31:45 +0200270 return 0;
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200271 si->ob->flags |= CF_SHUTW;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200272 si->ob->wex = TICK_ETERNITY;
273 si->flags &= ~SI_FL_WAIT_DATA;
274
275 switch (si->state) {
276 case SI_ST_EST:
Willy Tarreau4a36b562012-08-06 19:31:45 +0200277 /* we have to shut before closing, otherwise some short messages
278 * may never leave the system, especially when there are remaining
279 * unread data in the socket input buffer, or when nolinger is set.
280 * However, if SI_FL_NOLINGER is explicitly set, we know there is
281 * no risk so we close both sides immediately.
282 */
283 if (si->flags & SI_FL_ERR) {
284 /* quick close, the socket is already shut. Remove pending flags. */
285 si->flags &= ~SI_FL_NOLINGER;
286 } else if (si->flags & SI_FL_NOLINGER) {
287 si->flags &= ~SI_FL_NOLINGER;
288 if (conn->ctrl) {
Willy Tarreau7f7ad912012-11-11 19:27:15 +0100289 setsockopt(si->conn->t.sock.fd, SOL_SOCKET, SO_LINGER,
Willy Tarreau4a36b562012-08-06 19:31:45 +0200290 (struct linger *) &nolinger, sizeof(struct linger));
291 }
292 /* unclean data-layer shutdown */
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200293 if (conn->xprt && conn->xprt->shutw)
294 conn->xprt->shutw(conn, 0);
Willy Tarreau4a36b562012-08-06 19:31:45 +0200295 } else {
296 /* clean data-layer shutdown */
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200297 if (conn->xprt && conn->xprt->shutw)
298 conn->xprt->shutw(conn, 1);
Willy Tarreau4a36b562012-08-06 19:31:45 +0200299
300 if (!(si->flags & SI_FL_NOHALF)) {
301 /* We shutdown transport layer */
302 if (conn->ctrl)
Willy Tarreau7f7ad912012-11-11 19:27:15 +0100303 shutdown(si->conn->t.sock.fd, SHUT_WR);
Willy Tarreau4a36b562012-08-06 19:31:45 +0200304
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200305 if (!(si->ib->flags & (CF_SHUTR|CF_DONT_READ))) {
Willy Tarreau4a36b562012-08-06 19:31:45 +0200306 /* OK just a shutw, but we want the caller
307 * to disable polling on this FD if exists.
308 */
309 return !!conn->ctrl;
310 }
311 }
312 }
Willy Tarreaufb90d942009-09-05 20:57:35 +0200313
314 /* fall through */
315 case SI_ST_CON:
Willy Tarreau4a36b562012-08-06 19:31:45 +0200316 /* we may have to close a pending connection, and mark the
317 * response buffer as shutr
318 */
Willy Tarreau2b199c92012-11-23 17:32:21 +0100319 conn_full_close(si->conn);
Willy Tarreau4a36b562012-08-06 19:31:45 +0200320 /* fall through */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200321 case SI_ST_CER:
Willy Tarreau32d3ee92010-12-29 14:03:02 +0100322 case SI_ST_QUE:
323 case SI_ST_TAR:
Willy Tarreaufb90d942009-09-05 20:57:35 +0200324 si->state = SI_ST_DIS;
Willy Tarreaud8ccffe2010-09-07 16:16:50 +0200325
326 if (si->release)
327 si->release(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200328 default:
329 si->flags &= ~SI_FL_WAIT_ROOM;
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200330 si->ib->flags |= CF_SHUTR;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200331 si->ib->rex = TICK_ETERNITY;
332 si->exp = TICK_ETERNITY;
333 }
334
Willy Tarreau4a36b562012-08-06 19:31:45 +0200335 /* note that if the task exists, it must unregister itself once it runs */
336 if (!conn->ctrl && !(si->flags & SI_FL_DONT_WAKE) && si->owner)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200337 task_wakeup(si->owner, TASK_WOKEN_IO);
Willy Tarreau4a36b562012-08-06 19:31:45 +0200338 return 0;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200339}
340
341/* default chk_rcv function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200342static void stream_int_chk_rcv(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200343{
Willy Tarreau7421efb2012-07-02 15:11:27 +0200344 struct channel *ib = si->ib;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200345
346 DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n",
347 __FUNCTION__,
348 si, si->state, si->ib->flags, si->ob->flags);
349
Willy Tarreaub31c9712012-11-11 23:05:39 +0100350 if (unlikely(si->state != SI_ST_EST || (ib->flags & (CF_SHUTR|CF_DONT_READ))))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200351 return;
352
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +0200353 if (channel_full(ib)) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200354 /* stop reading */
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +0200355 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200356 }
357 else {
358 /* (re)start reading */
359 si->flags &= ~SI_FL_WAIT_ROOM;
360 if (!(si->flags & SI_FL_DONT_WAKE) && si->owner)
361 task_wakeup(si->owner, TASK_WOKEN_IO);
362 }
363}
364
365/* default chk_snd function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200366static void stream_int_chk_snd(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200367{
Willy Tarreau7421efb2012-07-02 15:11:27 +0200368 struct channel *ob = si->ob;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200369
370 DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n",
371 __FUNCTION__,
372 si, si->state, si->ib->flags, si->ob->flags);
373
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200374 if (unlikely(si->state != SI_ST_EST || (si->ob->flags & CF_SHUTW)))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200375 return;
376
377 if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */
Willy Tarreau8e21bb92012-08-24 22:40:29 +0200378 channel_is_empty(ob)) /* called with nothing to send ! */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200379 return;
380
381 /* Otherwise there are remaining data to be sent in the buffer,
382 * so we tell the handler.
383 */
384 si->flags &= ~SI_FL_WAIT_DATA;
385 if (!tick_isset(ob->wex))
386 ob->wex = tick_add_ifset(now_ms, ob->wto);
387
388 if (!(si->flags & SI_FL_DONT_WAKE) && si->owner)
389 task_wakeup(si->owner, TASK_WOKEN_IO);
390}
391
Willy Tarreaub24281b2011-02-13 13:16:36 +0100392/* Register an applet to handle a stream_interface as part of the stream
Willy Tarreaufb90d942009-09-05 20:57:35 +0200393 * interface's owner task, which is returned. The SI will wake it up everytime
Willy Tarreaub24281b2011-02-13 13:16:36 +0100394 * it is solicited. The task's processing function must call the applet's
Willy Tarreaufb90d942009-09-05 20:57:35 +0200395 * function before returning. It must be deleted by the task handler using
Willy Tarreaub24281b2011-02-13 13:16:36 +0100396 * stream_int_unregister_handler(), possibly from within the function itself.
Willy Tarreaufa6bac62012-05-31 14:16:59 +0200397 * It also pre-initializes applet.state to zero and the connection context
398 * to NULL.
Willy Tarreaufb90d942009-09-05 20:57:35 +0200399 */
Willy Tarreaub24281b2011-02-13 13:16:36 +0100400struct task *stream_int_register_handler(struct stream_interface *si, struct si_applet *app)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200401{
Simon Horman7abd00d2011-08-13 08:03:51 +0900402 DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si->owner);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200403
Willy Tarreauc5788912012-08-24 18:12:41 +0200404 si_prepare_embedded(si);
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100405 si->conn->target = &app->obj_type;
Willy Tarreau128b03c2012-11-11 23:14:16 +0100406 si->release = app->release;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200407 si->flags |= SI_FL_WAIT_DATA;
408 return si->owner;
409}
410
Willy Tarreaufb90d942009-09-05 20:57:35 +0200411/* Unregister a stream interface handler. This must be called by the handler task
Willy Tarreau128b03c2012-11-11 23:14:16 +0100412 * itself when it detects that it is in the SI_ST_DIS state.
Willy Tarreaufb90d942009-09-05 20:57:35 +0200413 */
414void stream_int_unregister_handler(struct stream_interface *si)
415{
Willy Tarreau128b03c2012-11-11 23:14:16 +0100416 si->release = NULL;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200417 si->owner = NULL;
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100418 si->conn->target = NULL;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200419}
420
Willy Tarreau2c6be842012-07-06 17:12:34 +0200421/* This callback is used to send a valid PROXY protocol line to a socket being
Willy Tarreauafad0e02012-08-09 14:45:22 +0200422 * established. It returns 0 if it fails in a fatal way or needs to poll to go
423 * further, otherwise it returns non-zero and removes itself from the connection's
Willy Tarreaua1a74742012-08-24 12:14:49 +0200424 * flags (the bit is provided in <flag> by the caller). It is designed to be
425 * called by the connection handler and relies on it to commit polling changes.
Willy Tarreau2c6be842012-07-06 17:12:34 +0200426 */
427int conn_si_send_proxy(struct connection *conn, unsigned int flag)
428{
Willy Tarreaue603e692012-09-27 22:20:41 +0200429 struct stream_interface *si = conn->owner;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200430
431 /* we might have been called just after an asynchronous shutw */
Willy Tarreaua1a74742012-08-24 12:14:49 +0200432 if (conn->flags & CO_FL_SOCK_WR_SH)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200433 goto out_error;
434
435 /* If we have a PROXY line to send, we'll use this to validate the
436 * connection, in which case the connection is validated only once
437 * we've sent the whole proxy line. Otherwise we use connect().
438 */
439 if (si->send_proxy_ofs) {
440 int ret;
441
442 /* The target server expects a PROXY line to be sent first.
443 * If the send_proxy_ofs is negative, it corresponds to the
444 * offset to start sending from then end of the proxy string
445 * (which is recomputed every time since it's constant). If
446 * it is positive, it means we have to send from the start.
447 */
Willy Tarreau19d14ef2012-10-29 16:51:55 +0100448 ret = make_proxy_line(trash.str, trash.size, &si->ob->prod->conn->addr.from, &si->ob->prod->conn->addr.to);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200449 if (!ret)
450 goto out_error;
451
452 if (si->send_proxy_ofs > 0)
453 si->send_proxy_ofs = -ret; /* first call */
454
Willy Tarreaua1a74742012-08-24 12:14:49 +0200455 /* we have to send trash from (ret+sp for -sp bytes). If the
456 * data layer has a pending write, we'll also set MSG_MORE.
457 */
Willy Tarreau19d14ef2012-10-29 16:51:55 +0100458 ret = send(conn->t.sock.fd, trash.str + ret + si->send_proxy_ofs, -si->send_proxy_ofs,
Willy Tarreaua1a74742012-08-24 12:14:49 +0200459 (conn->flags & CO_FL_DATA_WR_ENA) ? MSG_MORE : 0);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200460
461 if (ret == 0)
462 goto out_wait;
463
464 if (ret < 0) {
465 if (errno == EAGAIN)
466 goto out_wait;
467 goto out_error;
468 }
469
470 si->send_proxy_ofs += ret; /* becomes zero once complete */
471 if (si->send_proxy_ofs != 0)
472 goto out_wait;
473
474 /* OK we've sent the whole line, we're connected */
475 }
476
Willy Tarreaua1a74742012-08-24 12:14:49 +0200477 /* The connection is ready now, simply return and let the connection
478 * handler notify upper layers if needed.
Willy Tarreau2c6be842012-07-06 17:12:34 +0200479 */
480 if (conn->flags & CO_FL_WAIT_L4_CONN)
481 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200482 conn->flags &= ~flag;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200483 return 1;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200484
485 out_error:
Willy Tarreauafad0e02012-08-09 14:45:22 +0200486 /* Write error on the file descriptor */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200487 conn->flags |= CO_FL_ERROR;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200488 conn->flags &= ~flag;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200489 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200490
491 out_wait:
Willy Tarreaua1a74742012-08-24 12:14:49 +0200492 __conn_sock_stop_recv(conn);
493 __conn_sock_poll_send(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200494 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200495}
496
Willy Tarreau100c4672012-08-20 12:06:26 +0200497/* Callback to be used by connection I/O handlers upon completion. It differs from
Willy Tarreau4aa36832012-10-02 20:07:22 +0200498 * the update function in that it is designed to be called by lower layers after I/O
Willy Tarreau100c4672012-08-20 12:06:26 +0200499 * events have been completed. It will also try to wake the associated task up if
Willy Tarreauf16723e2012-08-24 12:52:22 +0200500 * an important event requires special handling. It relies on the connection handler
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200501 * to commit any polling updates. The function always returns 0.
Willy Tarreau100c4672012-08-20 12:06:26 +0200502 */
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200503static int si_conn_wake_cb(struct connection *conn)
Willy Tarreaufd31e532012-07-23 18:24:25 +0200504{
Willy Tarreaue603e692012-09-27 22:20:41 +0200505 struct stream_interface *si = conn->owner;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200506
507 DPRINTF(stderr, "%s: si=%p, si->state=%d ib->flags=%08x ob->flags=%08x\n",
508 __FUNCTION__,
509 si, si->state, si->ib->flags, si->ob->flags);
510
Willy Tarreau3c55ec22012-07-23 19:19:51 +0200511 if (conn->flags & CO_FL_ERROR)
512 si->flags |= SI_FL_ERR;
513
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200514 /* check for recent connection establishment */
Willy Tarreauc76ae332012-07-12 15:32:13 +0200515 if (unlikely(!(conn->flags & (CO_FL_WAIT_L4_CONN | CO_FL_WAIT_L6_CONN | CO_FL_CONNECTED)))) {
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200516 si->exp = TICK_ETERNITY;
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200517 si->ob->flags |= CF_WRITE_NULL;
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200518 }
519
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200520 /* process consumer side */
Willy Tarreau8e21bb92012-08-24 22:40:29 +0200521 if (channel_is_empty(si->ob)) {
Willy Tarreaub31c9712012-11-11 23:05:39 +0100522 if (((si->ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) &&
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200523 (si->state == SI_ST_EST))
524 stream_int_shutw(si);
Willy Tarreauf16723e2012-08-24 12:52:22 +0200525 __conn_data_stop_send(conn);
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200526 si->ob->wex = TICK_ETERNITY;
527 }
Willy Tarreaufd31e532012-07-23 18:24:25 +0200528
Willy Tarreaub31c9712012-11-11 23:05:39 +0100529 if ((si->ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0 && !channel_full(si->ob))
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200530 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200531
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200532 if (si->ob->flags & CF_WRITE_ACTIVITY) {
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200533 /* update timeouts if we have written something */
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200534 if ((si->ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
Willy Tarreau8e21bb92012-08-24 22:40:29 +0200535 !channel_is_empty(si->ob))
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200536 if (tick_isset(si->ob->wex))
537 si->ob->wex = tick_add_ifset(now_ms, si->ob->wto);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200538
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200539 if (!(si->flags & SI_FL_INDEP_STR))
540 if (tick_isset(si->ib->rex))
541 si->ib->rex = tick_add_ifset(now_ms, si->ib->rto);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200542
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200543 if (likely((si->ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL|CF_DONT_READ)) == CF_WRITE_PARTIAL &&
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +0200544 !channel_full(si->ob) &&
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200545 (si->ob->prod->flags & SI_FL_WAIT_ROOM)))
546 si_chk_rcv(si->ob->prod);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200547 }
548
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200549 /* process producer side.
550 * We might have some data the consumer is waiting for.
551 * We can do fast-forwarding, but we avoid doing this for partial
552 * buffers, because it is very likely that it will be done again
553 * immediately afterwards once the following data is parsed (eg:
554 * HTTP chunking).
555 */
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200556 if (((si->ib->flags & CF_READ_PARTIAL) && !channel_is_empty(si->ib)) &&
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200557 (si->ib->pipe /* always try to send spliced data */ ||
Willy Tarreau9b28e032012-10-12 23:49:43 +0200558 (si->ib->buf->i == 0 && (si->ib->cons->flags & SI_FL_WAIT_DATA)))) {
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200559 int last_len = si->ib->pipe ? si->ib->pipe->data : 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200560
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200561 si_chk_snd(si->ib->cons);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200562
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200563 /* check if the consumer has freed some space either in the
564 * buffer or in the pipe.
565 */
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +0200566 if (!channel_full(si->ib) &&
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200567 (!last_len || !si->ib->pipe || si->ib->pipe->data < last_len))
568 si->flags &= ~SI_FL_WAIT_ROOM;
569 }
Willy Tarreaufd31e532012-07-23 18:24:25 +0200570
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200571 if (si->flags & SI_FL_WAIT_ROOM) {
Willy Tarreauf16723e2012-08-24 12:52:22 +0200572 __conn_data_stop_recv(conn);
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200573 si->ib->rex = TICK_ETERNITY;
574 }
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200575 else if ((si->ib->flags & (CF_SHUTR|CF_READ_PARTIAL|CF_DONT_READ|CF_READ_NOEXP)) == CF_READ_PARTIAL &&
Willy Tarreau3bf1b2b2012-08-27 20:46:07 +0200576 !channel_full(si->ib)) {
Willy Tarreau9f7c6a12012-11-19 16:43:14 +0100577 /* we must re-enable reading if si_chk_snd() has freed some space */
578 __conn_data_want_recv(conn);
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200579 if (tick_isset(si->ib->rex))
580 si->ib->rex = tick_add_ifset(now_ms, si->ib->rto);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200581 }
582
583 /* wake the task up only when needed */
584 if (/* changes on the production side */
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200585 (si->ib->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
Willy Tarreaufd31e532012-07-23 18:24:25 +0200586 si->state != SI_ST_EST ||
587 (si->flags & SI_FL_ERR) ||
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200588 ((si->ib->flags & CF_READ_PARTIAL) &&
Willy Tarreaufd31e532012-07-23 18:24:25 +0200589 (!si->ib->to_forward || si->ib->cons->state != SI_ST_EST)) ||
590
591 /* changes on the consumption side */
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200592 (si->ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
593 ((si->ob->flags & CF_WRITE_ACTIVITY) &&
594 ((si->ob->flags & CF_SHUTW) ||
Willy Tarreaufd31e532012-07-23 18:24:25 +0200595 si->ob->prod->state != SI_ST_EST ||
Willy Tarreau8e21bb92012-08-24 22:40:29 +0200596 (channel_is_empty(si->ob) && !si->ob->to_forward)))) {
Willy Tarreaufd31e532012-07-23 18:24:25 +0200597 task_wakeup(si->owner, TASK_WOKEN_IO);
598 }
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200599 if (si->ib->flags & CF_READ_ACTIVITY)
600 si->ib->flags &= ~CF_READ_DONTWAIT;
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200601 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200602}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200603
Willy Tarreau5368d802012-08-21 18:22:06 +0200604/*
605 * This function is called to send buffer data to a stream socket.
606 * It returns -1 in case of unrecoverable error, otherwise zero.
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200607 * It iterates the transport layer's snd_buf function. It relies on the
Willy Tarreauf16723e2012-08-24 12:52:22 +0200608 * caller to commit polling changes.
Willy Tarreau5368d802012-08-21 18:22:06 +0200609 */
610static int si_conn_send_loop(struct connection *conn)
611{
Willy Tarreaue603e692012-09-27 22:20:41 +0200612 struct stream_interface *si = conn->owner;
Willy Tarreaucb76e592012-10-12 23:56:57 +0200613 struct channel *chn = si->ob;
Willy Tarreau5368d802012-08-21 18:22:06 +0200614 int ret;
615
Willy Tarreaucb76e592012-10-12 23:56:57 +0200616 if (chn->pipe && conn->xprt->snd_pipe) {
617 ret = conn->xprt->snd_pipe(conn, chn->pipe);
Willy Tarreau96199b12012-08-24 00:46:52 +0200618 if (ret > 0)
Willy Tarreaucb76e592012-10-12 23:56:57 +0200619 chn->flags |= CF_WRITE_PARTIAL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200620
Willy Tarreaucb76e592012-10-12 23:56:57 +0200621 if (!chn->pipe->data) {
622 put_pipe(chn->pipe);
623 chn->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200624 }
625
Willy Tarreau96199b12012-08-24 00:46:52 +0200626 if (conn->flags & CO_FL_ERROR)
627 return -1;
Willy Tarreau5368d802012-08-21 18:22:06 +0200628 }
629
630 /* At this point, the pipe is empty, but we may still have data pending
631 * in the normal buffer.
632 */
Willy Tarreau9b28e032012-10-12 23:49:43 +0200633 if (!chn->buf->o)
Willy Tarreau5368d802012-08-21 18:22:06 +0200634 return 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200635
636 /* when we're in this loop, we already know that there is no spliced
637 * data left, and that there are sendable buffered data.
638 */
Willy Tarreau56a77e52012-09-02 18:34:44 +0200639 while (!(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_WR_SH | CO_FL_DATA_WR_SH | CO_FL_WAIT_DATA | CO_FL_WAIT_WR | CO_FL_HANDSHAKE))) {
Willy Tarreau5368d802012-08-21 18:22:06 +0200640 /* check if we want to inform the kernel that we're interested in
641 * sending more data after this call. We want this if :
642 * - we're about to close after this last send and want to merge
643 * the ongoing FIN with the last segment.
644 * - we know we can't send everything at once and must get back
645 * here because of unaligned data
646 * - there is still a finite amount of data to forward
647 * The test is arranged so that the most common case does only 2
648 * tests.
649 */
650 unsigned int send_flag = MSG_DONTWAIT | MSG_NOSIGNAL;
651
Willy Tarreaucb76e592012-10-12 23:56:57 +0200652 if ((!(chn->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
653 ((chn->to_forward && chn->to_forward != CHN_INFINITE_FORWARD) ||
654 (chn->flags & CF_EXPECT_MORE))) ||
Willy Tarreaub31c9712012-11-11 23:05:39 +0100655 ((chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW))
Willy Tarreau5368d802012-08-21 18:22:06 +0200656 send_flag |= MSG_MORE;
657
Willy Tarreau9b28e032012-10-12 23:49:43 +0200658 ret = conn->xprt->snd_buf(conn, chn->buf, send_flag);
Willy Tarreau5368d802012-08-21 18:22:06 +0200659 if (ret <= 0)
660 break;
661
Willy Tarreaucb76e592012-10-12 23:56:57 +0200662 chn->flags |= CF_WRITE_PARTIAL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200663
Willy Tarreau9b28e032012-10-12 23:49:43 +0200664 if (!chn->buf->o) {
Willy Tarreau5368d802012-08-21 18:22:06 +0200665 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreaucb76e592012-10-12 23:56:57 +0200666 chn->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Willy Tarreau5368d802012-08-21 18:22:06 +0200667 break;
668 }
669
Willy Tarreaued7f8362012-10-29 23:27:14 +0100670 /* if some data remain in the buffer, it's only because the
671 * system bufers are full, so we don't want to loop again.
672 */
673 break;
Willy Tarreau5368d802012-08-21 18:22:06 +0200674 } /* while */
675
676 if (conn->flags & CO_FL_ERROR)
677 return -1;
678
Willy Tarreau5368d802012-08-21 18:22:06 +0200679 return 0;
680}
681
682
Willy Tarreau100c4672012-08-20 12:06:26 +0200683/* Updates the timers and flags of a stream interface attached to a connection,
684 * depending on the buffers' flags. It should only be called once after the
685 * buffer flags have settled down, and before they are cleared. It doesn't
686 * harm to call it as often as desired (it just slightly hurts performance).
687 * It is only meant to be called by upper layers after buffer flags have been
688 * manipulated by analysers.
689 */
690void stream_int_update_conn(struct stream_interface *si)
691{
Willy Tarreau7421efb2012-07-02 15:11:27 +0200692 struct channel *ib = si->ib;
693 struct channel *ob = si->ob;
Willy Tarreau100c4672012-08-20 12:06:26 +0200694
Willy Tarreau100c4672012-08-20 12:06:26 +0200695 /* Check if we need to close the read side */
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200696 if (!(ib->flags & CF_SHUTR)) {
Willy Tarreau100c4672012-08-20 12:06:26 +0200697 /* Read not closed, update FD status and timeout for reads */
Willy Tarreaub31c9712012-11-11 23:05:39 +0100698 if ((ib->flags & CF_DONT_READ) || channel_full(ib)) {
Willy Tarreau100c4672012-08-20 12:06:26 +0200699 /* stop reading */
700 if (!(si->flags & SI_FL_WAIT_ROOM)) {
Willy Tarreaub31c9712012-11-11 23:05:39 +0100701 if (!(ib->flags & CF_DONT_READ)) /* full */
Willy Tarreau100c4672012-08-20 12:06:26 +0200702 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreauf2943dc2012-10-26 20:10:28 +0200703 conn_data_stop_recv(si->conn);
Willy Tarreau100c4672012-08-20 12:06:26 +0200704 ib->rex = TICK_ETERNITY;
705 }
706 }
707 else {
708 /* (re)start reading and update timeout. Note: we don't recompute the timeout
709 * everytime we get here, otherwise it would risk never to expire. We only
710 * update it if is was not yet set. The stream socket handler will already
711 * have updated it if there has been a completed I/O.
712 */
713 si->flags &= ~SI_FL_WAIT_ROOM;
Willy Tarreauf2943dc2012-10-26 20:10:28 +0200714 conn_data_want_recv(si->conn);
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200715 if (!(ib->flags & (CF_READ_NOEXP|CF_DONT_READ)) && !tick_isset(ib->rex))
Willy Tarreau100c4672012-08-20 12:06:26 +0200716 ib->rex = tick_add_ifset(now_ms, ib->rto);
717 }
718 }
719
720 /* Check if we need to close the write side */
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200721 if (!(ob->flags & CF_SHUTW)) {
Willy Tarreau100c4672012-08-20 12:06:26 +0200722 /* Write not closed, update FD status and timeout for writes */
Willy Tarreau8e21bb92012-08-24 22:40:29 +0200723 if (channel_is_empty(ob)) {
Willy Tarreau100c4672012-08-20 12:06:26 +0200724 /* stop writing */
725 if (!(si->flags & SI_FL_WAIT_DATA)) {
Willy Tarreaub31c9712012-11-11 23:05:39 +0100726 if ((ob->flags & CF_SHUTW_NOW) == 0)
Willy Tarreau100c4672012-08-20 12:06:26 +0200727 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauf2943dc2012-10-26 20:10:28 +0200728 conn_data_stop_send(si->conn);
Willy Tarreau100c4672012-08-20 12:06:26 +0200729 ob->wex = TICK_ETERNITY;
730 }
731 }
732 else {
733 /* (re)start writing and update timeout. Note: we don't recompute the timeout
734 * everytime we get here, otherwise it would risk never to expire. We only
735 * update it if is was not yet set. The stream socket handler will already
736 * have updated it if there has been a completed I/O.
737 */
738 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauf2943dc2012-10-26 20:10:28 +0200739 conn_data_want_send(si->conn);
Willy Tarreau100c4672012-08-20 12:06:26 +0200740 if (!tick_isset(ob->wex)) {
741 ob->wex = tick_add_ifset(now_ms, ob->wto);
742 if (tick_isset(ib->rex) && !(si->flags & SI_FL_INDEP_STR)) {
743 /* Note: depending on the protocol, we don't know if we're waiting
744 * for incoming data or not. So in order to prevent the socket from
745 * expiring read timeouts during writes, we refresh the read timeout,
746 * except if it was already infinite or if we have explicitly setup
747 * independent streams.
748 */
749 ib->rex = tick_add_ifset(now_ms, ib->rto);
750 }
751 }
752 }
753 }
754}
755
Willy Tarreau46a8d922012-08-20 12:38:36 +0200756/* This function is used for inter-stream-interface calls. It is called by the
757 * consumer to inform the producer side that it may be interested in checking
758 * for free space in the buffer. Note that it intentionally does not update
759 * timeouts, so that we can still check them later at wake-up. This function is
760 * dedicated to connection-based stream interfaces.
761 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200762static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +0200763{
Willy Tarreau7421efb2012-07-02 15:11:27 +0200764 struct channel *ib = si->ib;
Willy Tarreau46a8d922012-08-20 12:38:36 +0200765
Willy Tarreau34ffd772012-09-03 16:51:27 +0200766 if (unlikely(si->state > SI_ST_EST || (ib->flags & CF_SHUTR)))
Willy Tarreau46a8d922012-08-20 12:38:36 +0200767 return;
768
Willy Tarreaub31c9712012-11-11 23:05:39 +0100769 if ((ib->flags & CF_DONT_READ) || channel_full(ib)) {
Willy Tarreau46a8d922012-08-20 12:38:36 +0200770 /* stop reading */
Willy Tarreaub31c9712012-11-11 23:05:39 +0100771 if (!(ib->flags & CF_DONT_READ)) /* full */
Willy Tarreau46a8d922012-08-20 12:38:36 +0200772 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreauf2943dc2012-10-26 20:10:28 +0200773 conn_data_stop_recv(si->conn);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200774 }
775 else {
776 /* (re)start reading */
777 si->flags &= ~SI_FL_WAIT_ROOM;
Willy Tarreauf2943dc2012-10-26 20:10:28 +0200778 conn_data_want_recv(si->conn);
Willy Tarreau46a8d922012-08-20 12:38:36 +0200779 }
780}
781
782
Willy Tarreaude5722c2012-08-20 15:01:10 +0200783/* This function is used for inter-stream-interface calls. It is called by the
784 * producer to inform the consumer side that it may be interested in checking
785 * for data in the buffer. Note that it intentionally does not update timeouts,
786 * so that we can still check them later at wake-up.
787 */
Willy Tarreauc5788912012-08-24 18:12:41 +0200788static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +0200789{
Willy Tarreau7421efb2012-07-02 15:11:27 +0200790 struct channel *ob = si->ob;
Willy Tarreaude5722c2012-08-20 15:01:10 +0200791
Willy Tarreau34ffd772012-09-03 16:51:27 +0200792 if (unlikely(si->state > SI_ST_EST || (ob->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +0200793 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +0200794
Willy Tarreau8e21bb92012-08-24 22:40:29 +0200795 if (unlikely(channel_is_empty(ob))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +0200796 return;
797
798 if (!ob->pipe && /* spliced data wants to be forwarded ASAP */
799 (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */
Willy Tarreau7f7ad912012-11-11 19:27:15 +0100800 (fdtab[si->conn->t.sock.fd].ev & FD_POLL_OUT))) /* we'll be called anyway */
Willy Tarreaude5722c2012-08-20 15:01:10 +0200801 return;
802
Willy Tarreauf2943dc2012-10-26 20:10:28 +0200803 if (!(si->conn->flags & CO_FL_HANDSHAKE) && si_conn_send_loop(si->conn) < 0) {
Willy Tarreaude5722c2012-08-20 15:01:10 +0200804 /* Write error on the file descriptor. We mark the FD as STERROR so
805 * that we don't use it anymore and we notify the task.
806 */
Willy Tarreau7f7ad912012-11-11 19:27:15 +0100807 fdtab[si->conn->t.sock.fd].ev &= ~FD_POLL_STICKY;
Willy Tarreauf2943dc2012-10-26 20:10:28 +0200808 __conn_data_stop_both(si->conn);
Willy Tarreaude5722c2012-08-20 15:01:10 +0200809 si->flags |= SI_FL_ERR;
Willy Tarreauf2943dc2012-10-26 20:10:28 +0200810 si->conn->flags |= CO_FL_ERROR;
Willy Tarreaude5722c2012-08-20 15:01:10 +0200811 goto out_wakeup;
812 }
813
814 /* OK, so now we know that some data might have been sent, and that we may
815 * have to poll first. We have to do that too if the buffer is not empty.
816 */
Willy Tarreau8e21bb92012-08-24 22:40:29 +0200817 if (channel_is_empty(ob)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +0200818 /* the connection is established but we can't write. Either the
819 * buffer is empty, or we just refrain from sending because the
820 * ->o limit was reached. Maybe we just wrote the last
821 * chunk and need to close.
822 */
Willy Tarreaub31c9712012-11-11 23:05:39 +0100823 if (((ob->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200824 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreaude5722c2012-08-20 15:01:10 +0200825 (si->state == SI_ST_EST)) {
826 si_shutw(si);
827 goto out_wakeup;
828 }
829
Willy Tarreaub31c9712012-11-11 23:05:39 +0100830 if ((ob->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +0200831 si->flags |= SI_FL_WAIT_DATA;
832 ob->wex = TICK_ETERNITY;
833 }
834 else {
835 /* Otherwise there are remaining data to be sent in the buffer,
836 * which means we have to poll before doing so.
837 */
Willy Tarreauf2943dc2012-10-26 20:10:28 +0200838 __conn_data_want_send(si->conn);
Willy Tarreaude5722c2012-08-20 15:01:10 +0200839 si->flags &= ~SI_FL_WAIT_DATA;
840 if (!tick_isset(ob->wex))
841 ob->wex = tick_add_ifset(now_ms, ob->wto);
842 }
843
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200844 if (likely(ob->flags & CF_WRITE_ACTIVITY)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +0200845 /* update timeout if we have written something */
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200846 if ((ob->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
Willy Tarreau8e21bb92012-08-24 22:40:29 +0200847 !channel_is_empty(ob))
Willy Tarreaude5722c2012-08-20 15:01:10 +0200848 ob->wex = tick_add_ifset(now_ms, ob->wto);
849
850 if (tick_isset(si->ib->rex) && !(si->flags & SI_FL_INDEP_STR)) {
851 /* Note: to prevent the client from expiring read timeouts
852 * during writes, we refresh it. We only do this if the
853 * interface is not configured for "independent streams",
854 * because for some applications it's better not to do this,
855 * for instance when continuously exchanging small amounts
856 * of data which can full the socket buffers long before a
857 * write timeout is detected.
858 */
859 si->ib->rex = tick_add_ifset(now_ms, si->ib->rto);
860 }
861 }
862
863 /* in case of special condition (error, shutdown, end of write...), we
864 * have to notify the task.
865 */
Willy Tarreau03cdb7c2012-08-27 23:14:58 +0200866 if (likely((ob->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
Willy Tarreau8e21bb92012-08-24 22:40:29 +0200867 (channel_is_empty(ob) && !ob->to_forward) ||
Willy Tarreaude5722c2012-08-20 15:01:10 +0200868 si->state != SI_ST_EST)) {
869 out_wakeup:
870 if (!(si->flags & SI_FL_DONT_WAKE) && si->owner)
871 task_wakeup(si->owner, TASK_WOKEN_IO);
872 }
Willy Tarreauf16723e2012-08-24 12:52:22 +0200873
874 /* commit possible polling changes */
Willy Tarreauf2943dc2012-10-26 20:10:28 +0200875 conn_cond_update_polling(si->conn);
Willy Tarreaude5722c2012-08-20 15:01:10 +0200876}
877
Willy Tarreaueecf6ca2012-08-20 15:09:53 +0200878/*
Willy Tarreauce323de2012-08-20 21:41:06 +0200879 * This is the callback which is called by the connection layer to receive data
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200880 * into the buffer from the connection. It iterates over the transport layer's
881 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +0200882 */
Willy Tarreau4aa36832012-10-02 20:07:22 +0200883static void si_conn_recv_cb(struct connection *conn)
Willy Tarreauce323de2012-08-20 21:41:06 +0200884{
Willy Tarreaue603e692012-09-27 22:20:41 +0200885 struct stream_interface *si = conn->owner;
Willy Tarreaucb76e592012-10-12 23:56:57 +0200886 struct channel *chn = si->ib;
Willy Tarreauce323de2012-08-20 21:41:06 +0200887 int ret, max, cur_read;
888 int read_poll = MAX_READ_POLL_LOOPS;
889
890 /* stop immediately on errors. Note that we DON'T want to stop on
891 * POLL_ERR, as the poller might report a write error while there
892 * are still data available in the recv buffer. This typically
893 * happens when we send too large a request to a backend server
894 * which rejects it before reading it all.
895 */
896 if (conn->flags & CO_FL_ERROR)
897 goto out_error;
898
899 /* stop here if we reached the end of data */
900 if (conn_data_read0_pending(conn))
901 goto out_shutdown_r;
902
903 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreaucb76e592012-10-12 23:56:57 +0200904 if (chn->flags & CF_SHUTR)
Willy Tarreauce323de2012-08-20 21:41:06 +0200905 return;
906
Willy Tarreau96199b12012-08-24 00:46:52 +0200907 cur_read = 0;
Willy Tarreau96199b12012-08-24 00:46:52 +0200908
909 /* First, let's see if we may splice data across the channel without
910 * using a buffer.
911 */
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200912 if (conn->xprt->rcv_pipe &&
Willy Tarreaucb76e592012-10-12 23:56:57 +0200913 chn->to_forward >= MIN_SPLICE_FORWARD && chn->flags & CF_KERN_SPLICING) {
Willy Tarreau9b28e032012-10-12 23:49:43 +0200914 if (buffer_not_empty(chn->buf)) {
Willy Tarreau96199b12012-08-24 00:46:52 +0200915 /* We're embarrassed, there are already data pending in
916 * the buffer and we don't want to have them at two
917 * locations at a time. Let's indicate we need some
918 * place and ask the consumer to hurry.
919 */
920 goto abort_splice;
921 }
Willy Tarreauce323de2012-08-20 21:41:06 +0200922
Willy Tarreaucb76e592012-10-12 23:56:57 +0200923 if (unlikely(chn->pipe == NULL)) {
924 if (pipes_used >= global.maxpipes || !(chn->pipe = get_pipe())) {
925 chn->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +0200926 goto abort_splice;
927 }
928 }
929
Willy Tarreaucb76e592012-10-12 23:56:57 +0200930 ret = conn->xprt->rcv_pipe(conn, chn->pipe, chn->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +0200931 if (ret < 0) {
932 /* splice not supported on this end, let's disable it */
Willy Tarreaucb76e592012-10-12 23:56:57 +0200933 chn->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +0200934 goto abort_splice;
935 }
Willy Tarreauce323de2012-08-20 21:41:06 +0200936
Willy Tarreau96199b12012-08-24 00:46:52 +0200937 if (ret > 0) {
Willy Tarreaucb76e592012-10-12 23:56:57 +0200938 if (chn->to_forward != CHN_INFINITE_FORWARD)
939 chn->to_forward -= ret;
940 chn->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +0200941 cur_read += ret;
Willy Tarreaucb76e592012-10-12 23:56:57 +0200942 chn->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +0200943 }
Willy Tarreau96199b12012-08-24 00:46:52 +0200944
945 if (conn_data_read0_pending(conn))
946 goto out_shutdown_r;
947
948 if (conn->flags & CO_FL_ERROR)
949 goto out_error;
950
Willy Tarreau56a77e52012-09-02 18:34:44 +0200951 if (conn->flags & CO_FL_WAIT_ROOM) /* most likely the pipe is full */
952 si->flags |= SI_FL_WAIT_ROOM;
953
Willy Tarreauce323de2012-08-20 21:41:06 +0200954 /* splice not possible (anymore), let's go on on standard copy */
955 }
Willy Tarreau96199b12012-08-24 00:46:52 +0200956
957 abort_splice:
958 /* release the pipe if we can, which is almost always the case */
Willy Tarreaucb76e592012-10-12 23:56:57 +0200959 if (chn->pipe && !chn->pipe->data) {
960 put_pipe(chn->pipe);
961 chn->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +0200962 }
963
Willy Tarreaucb76e592012-10-12 23:56:57 +0200964 while (!chn->pipe && !(conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_DATA_RD_SH | CO_FL_WAIT_RD | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE))) {
965 max = bi_avail(chn);
Willy Tarreauce323de2012-08-20 21:41:06 +0200966
967 if (!max) {
Willy Tarreau56a77e52012-09-02 18:34:44 +0200968 si->flags |= SI_FL_WAIT_ROOM;
Willy Tarreauce323de2012-08-20 21:41:06 +0200969 break;
970 }
971
Willy Tarreau9b28e032012-10-12 23:49:43 +0200972 ret = conn->xprt->rcv_buf(conn, chn->buf, max);
Willy Tarreauce323de2012-08-20 21:41:06 +0200973 if (ret <= 0)
974 break;
975
976 cur_read += ret;
977
978 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreaucb76e592012-10-12 23:56:57 +0200979 if (chn->to_forward && !(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +0200980 unsigned long fwd = ret;
Willy Tarreaucb76e592012-10-12 23:56:57 +0200981 if (chn->to_forward != CHN_INFINITE_FORWARD) {
982 if (fwd > chn->to_forward)
983 fwd = chn->to_forward;
984 chn->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +0200985 }
Willy Tarreau9b28e032012-10-12 23:49:43 +0200986 b_adv(chn->buf, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +0200987 }
988
Willy Tarreaucb76e592012-10-12 23:56:57 +0200989 chn->flags |= CF_READ_PARTIAL;
990 chn->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +0200991
Willy Tarreaucb76e592012-10-12 23:56:57 +0200992 if (channel_full(chn)) {
Willy Tarreauce323de2012-08-20 21:41:06 +0200993 /* The buffer is now full, there's no point in going through
994 * the loop again.
995 */
Willy Tarreau9b28e032012-10-12 23:49:43 +0200996 if (!(chn->flags & CF_STREAMER_FAST) && (cur_read == buffer_len(chn->buf))) {
Willy Tarreaucb76e592012-10-12 23:56:57 +0200997 chn->xfer_small = 0;
998 chn->xfer_large++;
999 if (chn->xfer_large >= 3) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001000 /* we call this buffer a fast streamer if it manages
1001 * to be filled in one call 3 consecutive times.
1002 */
Willy Tarreaucb76e592012-10-12 23:56:57 +02001003 chn->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauce323de2012-08-20 21:41:06 +02001004 //fputc('+', stderr);
1005 }
1006 }
Willy Tarreaucb76e592012-10-12 23:56:57 +02001007 else if ((chn->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
Willy Tarreau9b28e032012-10-12 23:49:43 +02001008 (cur_read <= chn->buf->size / 2)) {
Willy Tarreaucb76e592012-10-12 23:56:57 +02001009 chn->xfer_large = 0;
1010 chn->xfer_small++;
1011 if (chn->xfer_small >= 2) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001012 /* if the buffer has been at least half full twice,
1013 * we receive faster than we send, so at least it
1014 * is not a "fast streamer".
1015 */
Willy Tarreaucb76e592012-10-12 23:56:57 +02001016 chn->flags &= ~CF_STREAMER_FAST;
Willy Tarreauce323de2012-08-20 21:41:06 +02001017 //fputc('-', stderr);
1018 }
1019 }
1020 else {
Willy Tarreaucb76e592012-10-12 23:56:57 +02001021 chn->xfer_small = 0;
1022 chn->xfer_large = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001023 }
1024
Willy Tarreauce323de2012-08-20 21:41:06 +02001025 si->flags |= SI_FL_WAIT_ROOM;
1026 break;
1027 }
1028
Willy Tarreau5fddab02012-11-09 18:27:26 +01001029 if ((chn->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
1030 conn_data_stop_recv(conn);
Willy Tarreauce323de2012-08-20 21:41:06 +02001031 break;
Willy Tarreau5fddab02012-11-09 18:27:26 +01001032 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001033
1034 /* if too many bytes were missing from last read, it means that
1035 * it's pointless trying to read again because the system does
1036 * not have them in buffers.
1037 */
1038 if (ret < max) {
Willy Tarreaucb76e592012-10-12 23:56:57 +02001039 if ((chn->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
Willy Tarreau9b28e032012-10-12 23:49:43 +02001040 (cur_read <= chn->buf->size / 2)) {
Willy Tarreaucb76e592012-10-12 23:56:57 +02001041 chn->xfer_large = 0;
1042 chn->xfer_small++;
1043 if (chn->xfer_small >= 3) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001044 /* we have read less than half of the buffer in
1045 * one pass, and this happened at least 3 times.
1046 * This is definitely not a streamer.
1047 */
Willy Tarreaucb76e592012-10-12 23:56:57 +02001048 chn->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauce323de2012-08-20 21:41:06 +02001049 //fputc('!', stderr);
1050 }
1051 }
1052
1053 /* if a streamer has read few data, it may be because we
1054 * have exhausted system buffers. It's not worth trying
1055 * again.
1056 */
Willy Tarreaucb76e592012-10-12 23:56:57 +02001057 if (chn->flags & CF_STREAMER)
Willy Tarreauce323de2012-08-20 21:41:06 +02001058 break;
1059
1060 /* if we read a large block smaller than what we requested,
1061 * it's almost certain we'll never get anything more.
1062 */
1063 if (ret >= global.tune.recv_enough)
1064 break;
1065 }
1066 } /* while !flags */
1067
Willy Tarreau96199b12012-08-24 00:46:52 +02001068 if (conn->flags & CO_FL_ERROR)
1069 goto out_error;
1070
Willy Tarreauce323de2012-08-20 21:41:06 +02001071 if (conn_data_read0_pending(conn))
1072 /* connection closed */
1073 goto out_shutdown_r;
1074
1075 return;
1076
1077 out_shutdown_r:
1078 /* we received a shutdown */
Willy Tarreaucb76e592012-10-12 23:56:57 +02001079 chn->flags |= CF_READ_NULL;
1080 if (chn->flags & CF_AUTO_CLOSE)
1081 channel_shutw_now(chn);
Willy Tarreauce323de2012-08-20 21:41:06 +02001082 stream_sock_read0(si);
1083 conn_data_read0(conn);
1084 return;
1085
1086 out_error:
1087 /* Read error on the connection, report the error and stop I/O */
1088 conn->flags |= CO_FL_ERROR;
Willy Tarreauce323de2012-08-20 21:41:06 +02001089}
1090
1091/*
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001092 * This is the callback which is called by the connection layer to send data
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001093 * from the buffer to the connection. It iterates over the transport layer's
1094 * snd_buf function.
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001095 */
Willy Tarreau4aa36832012-10-02 20:07:22 +02001096static void si_conn_send_cb(struct connection *conn)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001097{
Willy Tarreaue603e692012-09-27 22:20:41 +02001098 struct stream_interface *si = conn->owner;
Willy Tarreaucb76e592012-10-12 23:56:57 +02001099 struct channel *chn = si->ob;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001100
1101 if (conn->flags & CO_FL_ERROR)
1102 goto out_error;
1103
Willy Tarreauf2943dc2012-10-26 20:10:28 +02001104 if (si->conn->flags & CO_FL_HANDSHAKE)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001105 /* a handshake was requested */
1106 return;
1107
1108 /* we might have been called just after an asynchronous shutw */
Willy Tarreaucb76e592012-10-12 23:56:57 +02001109 if (chn->flags & CF_SHUTW)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001110 return;
1111
1112 /* OK there are data waiting to be sent */
Willy Tarreau5368d802012-08-21 18:22:06 +02001113 if (si_conn_send_loop(conn) < 0)
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001114 goto out_error;
1115
1116 /* OK all done */
1117 return;
1118
1119 out_error:
1120 /* Write error on the connection, report the error and stop I/O */
1121 conn->flags |= CO_FL_ERROR;
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001122}
1123
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001124/*
1125 * This function propagates a null read received on a socket-based connection.
1126 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
1127 * the close is also forwarded to the write side as an abort. This function is
1128 * still socket-specific as it handles a setsockopt() call to set the SO_LINGER
1129 * state on the socket.
1130 */
1131void stream_sock_read0(struct stream_interface *si)
1132{
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001133 si->ib->flags &= ~CF_SHUTR_NOW;
1134 if (si->ib->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001135 return;
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001136 si->ib->flags |= CF_SHUTR;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001137 si->ib->rex = TICK_ETERNITY;
1138 si->flags &= ~SI_FL_WAIT_ROOM;
1139
1140 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1141 return;
1142
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001143 if (si->ob->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001144 goto do_close;
1145
1146 if (si->flags & SI_FL_NOHALF) {
1147 /* we want to immediately forward this close to the write side */
1148 if (si->flags & SI_FL_NOLINGER) {
1149 si->flags &= ~SI_FL_NOLINGER;
Willy Tarreau7f7ad912012-11-11 19:27:15 +01001150 setsockopt(si->conn->t.sock.fd, SOL_SOCKET, SO_LINGER,
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001151 (struct linger *) &nolinger, sizeof(struct linger));
1152 }
1153 /* force flag on ssl to keep session in cache */
Willy Tarreauf2943dc2012-10-26 20:10:28 +02001154 if (si->conn->xprt->shutw)
1155 si->conn->xprt->shutw(si->conn, 0);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001156 goto do_close;
1157 }
1158
1159 /* otherwise that's just a normal read shutdown */
Willy Tarreauf2943dc2012-10-26 20:10:28 +02001160 __conn_data_stop_recv(si->conn);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001161 return;
1162
1163 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001164 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreau2b199c92012-11-23 17:32:21 +01001165 conn_full_close(si->conn);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001166
1167 si->ib->flags &= ~CF_SHUTR_NOW;
1168 si->ib->flags |= CF_SHUTR;
1169 si->ib->rex = TICK_ETERNITY;
1170
1171 si->ob->flags &= ~CF_SHUTW_NOW;
1172 si->ob->flags |= CF_SHUTW;
1173 si->ob->wex = TICK_ETERNITY;
1174
1175 si->flags &= ~(SI_FL_WAIT_DATA | SI_FL_WAIT_ROOM);
1176
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001177 si->state = SI_ST_DIS;
1178 si->exp = TICK_ETERNITY;
1179 if (si->release)
1180 si->release(si);
1181 return;
1182}
1183
Willy Tarreaudded32d2008-11-30 19:48:07 +01001184/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001185 * Local variables:
1186 * c-indent-level: 8
1187 * c-basic-offset: 8
1188 * End:
1189 */