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Willy Tarreaucff64112008-11-03 06:26:53 +01001/*
2 * Functions managing stream_interface structures
3 *
Willy Tarreauf873d752012-05-11 17:47:17 +02004 * Copyright 2000-2012 Willy Tarreau <w@1wt.eu>
Willy Tarreaucff64112008-11-03 06:26:53 +01005 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13#include <errno.h>
14#include <fcntl.h>
15#include <stdio.h>
16#include <stdlib.h>
17
18#include <sys/socket.h>
19#include <sys/stat.h>
20#include <sys/types.h>
21
Willy Tarreaubf883e02014-11-25 21:10:35 +010022#include <common/buffer.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010023#include <common/compat.h>
24#include <common/config.h>
25#include <common/debug.h>
26#include <common/standard.h>
27#include <common/ticks.h>
28#include <common/time.h>
29
Willy Tarreau8a8d83b2015-04-13 13:24:54 +020030#include <proto/applet.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +020031#include <proto/channel.h>
Willy Tarreau8b117082012-08-06 15:06:49 +020032#include <proto/connection.h>
Olivier Houchard9aaf7782017-09-13 18:30:23 +020033#include <proto/mux_pt.h>
Willy Tarreau96199b12012-08-24 00:46:52 +020034#include <proto/pipe.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020035#include <proto/stream.h>
Willy Tarreau269358d2009-09-20 20:14:49 +020036#include <proto/stream_interface.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010037#include <proto/task.h>
38
Willy Tarreaufd31e532012-07-23 18:24:25 +020039#include <types/pipe.h>
40
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010041/* functions used by default on a detached stream-interface */
Willy Tarreau6fe15412013-09-29 15:16:03 +020042static void stream_int_shutr(struct stream_interface *si);
43static void stream_int_shutw(struct stream_interface *si);
Willy Tarreauf873d752012-05-11 17:47:17 +020044static void stream_int_chk_rcv(struct stream_interface *si);
45static void stream_int_chk_snd(struct stream_interface *si);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010046
47/* functions used on a conn_stream-based stream-interface */
Willy Tarreau6fe15412013-09-29 15:16:03 +020048static void stream_int_shutr_conn(struct stream_interface *si);
49static void stream_int_shutw_conn(struct stream_interface *si);
Willy Tarreauc5788912012-08-24 18:12:41 +020050static void stream_int_chk_rcv_conn(struct stream_interface *si);
51static void stream_int_chk_snd_conn(struct stream_interface *si);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010052
53/* functions used on an applet-based stream-interface */
Willy Tarreaud45b9f82015-04-13 16:30:14 +020054static void stream_int_shutr_applet(struct stream_interface *si);
55static void stream_int_shutw_applet(struct stream_interface *si);
56static void stream_int_chk_rcv_applet(struct stream_interface *si);
57static void stream_int_chk_snd_applet(struct stream_interface *si);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010058
59/* last read notification */
60static void stream_int_read0(struct stream_interface *si);
61
62/* post-IO notification callback */
63static void stream_int_notify(struct stream_interface *si);
Willy Tarreauf873d752012-05-11 17:47:17 +020064
Willy Tarreauc5788912012-08-24 18:12:41 +020065/* stream-interface operations for embedded tasks */
66struct si_ops si_embedded_ops = {
Willy Tarreau5c979a92012-05-07 17:15:39 +020067 .chk_rcv = stream_int_chk_rcv,
68 .chk_snd = stream_int_chk_snd,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020069 .shutr = stream_int_shutr,
70 .shutw = stream_int_shutw,
Willy Tarreau5c979a92012-05-07 17:15:39 +020071};
72
Willy Tarreauc5788912012-08-24 18:12:41 +020073/* stream-interface operations for connections */
74struct si_ops si_conn_ops = {
Willy Tarreauc5788912012-08-24 18:12:41 +020075 .chk_rcv = stream_int_chk_rcv_conn,
76 .chk_snd = stream_int_chk_snd_conn,
Willy Tarreau8b3d7df2013-09-29 14:51:58 +020077 .shutr = stream_int_shutr_conn,
78 .shutw = stream_int_shutw_conn,
Willy Tarreauc5788912012-08-24 18:12:41 +020079};
80
Willy Tarreaud45b9f82015-04-13 16:30:14 +020081/* stream-interface operations for connections */
82struct si_ops si_applet_ops = {
Willy Tarreaud45b9f82015-04-13 16:30:14 +020083 .chk_rcv = stream_int_chk_rcv_applet,
84 .chk_snd = stream_int_chk_snd_applet,
85 .shutr = stream_int_shutr_applet,
86 .shutw = stream_int_shutw_applet,
87};
88
Willy Tarreau14bfe9a2018-12-19 15:19:27 +010089
90/* Functions used to communicate with a conn_stream. The first two may be used
91 * directly, the last one is mostly a wake callback.
92 */
93int si_cs_recv(struct conn_stream *cs);
94int si_cs_send(struct conn_stream *cs);
95static int si_cs_process(struct conn_stream *cs);
96
97
Willy Tarreau74beec32012-10-03 00:41:04 +020098struct data_cb si_conn_cb = {
Olivier Houchard21df6cc2018-09-14 23:21:44 +020099 .wake = si_cs_process,
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +0100100 .name = "STRM",
Willy Tarreauc5788912012-08-24 18:12:41 +0200101};
102
Willy Tarreaucff64112008-11-03 06:26:53 +0100103/*
104 * This function only has to be called once after a wakeup event in case of
105 * suspected timeout. It controls the stream interface timeouts and sets
106 * si->flags accordingly. It does NOT close anything, as this timeout may
107 * be used for any purpose. It returns 1 if the timeout fired, otherwise
108 * zero.
109 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100110int si_check_timeouts(struct stream_interface *si)
Willy Tarreaucff64112008-11-03 06:26:53 +0100111{
112 if (tick_is_expired(si->exp, now_ms)) {
113 si->flags |= SI_FL_EXP;
114 return 1;
115 }
116 return 0;
117}
118
Willy Tarreaufe3718a2008-11-30 18:14:12 +0100119/* to be called only when in SI_ST_DIS with SI_FL_ERR */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100120void si_report_error(struct stream_interface *si)
Willy Tarreaucff64112008-11-03 06:26:53 +0100121{
122 if (!si->err_type)
123 si->err_type = SI_ET_DATA_ERR;
124
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100125 si_oc(si)->flags |= CF_WRITE_ERROR;
126 si_ic(si)->flags |= CF_READ_ERROR;
Willy Tarreaucff64112008-11-03 06:26:53 +0100127}
128
129/*
Willy Tarreaudded32d2008-11-30 19:48:07 +0100130 * Returns a message to the client ; the connection is shut down for read,
131 * and the request is cleared so that no server connection can be initiated.
132 * The buffer is marked for read shutdown on the other side to protect the
133 * message, and the buffer write is enabled. The message is contained in a
Willy Tarreau148d0992010-01-10 10:21:21 +0100134 * "chunk". If it is null, then an empty message is used. The reply buffer does
135 * not need to be empty before this, and its contents will not be overwritten.
136 * The primary goal of this function is to return error messages to a client.
Willy Tarreaudded32d2008-11-30 19:48:07 +0100137 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100138void si_retnclose(struct stream_interface *si,
Willy Tarreau83061a82018-07-13 11:56:34 +0200139 const struct buffer *msg)
Willy Tarreaudded32d2008-11-30 19:48:07 +0100140{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100141 struct channel *ic = si_ic(si);
142 struct channel *oc = si_oc(si);
143
144 channel_auto_read(ic);
145 channel_abort(ic);
146 channel_auto_close(ic);
147 channel_erase(ic);
148 channel_truncate(oc);
Willy Tarreau798e1282010-12-12 13:06:00 +0100149
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200150 if (likely(msg && msg->data))
151 co_inject(oc, msg->area, msg->data);
Willy Tarreaudded32d2008-11-30 19:48:07 +0100152
Willy Tarreauafc8a222014-11-28 15:46:27 +0100153 oc->wex = tick_add_ifset(now_ms, oc->wto);
154 channel_auto_read(oc);
155 channel_auto_close(oc);
156 channel_shutr_now(oc);
Willy Tarreau5d881d02009-12-27 22:51:06 +0100157}
158
Willy Tarreau4a36b562012-08-06 19:31:45 +0200159/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200160 * This function performs a shutdown-read on a detached stream interface in a
161 * connected or init state (it does nothing for other states). It either shuts
162 * the read side or marks itself as closed. The buffer flags are updated to
163 * reflect the new state. If the stream interface has SI_FL_NOHALF, we also
164 * forward the close to the write side. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200165 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200166static void stream_int_shutr(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200167{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100168 struct channel *ic = si_ic(si);
169
Willy Tarreauabb5d422018-11-14 16:58:52 +0100170 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100171 ic->flags &= ~CF_SHUTR_NOW;
172 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200173 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100174 ic->flags |= CF_SHUTR;
175 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200176
177 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200178 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200179
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100180 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200181 si->state = SI_ST_DIS;
182 si->exp = TICK_ETERNITY;
Willy Tarreaud8ccffe2010-09-07 16:16:50 +0200183 }
Willy Tarreau4a36b562012-08-06 19:31:45 +0200184 else if (si->flags & SI_FL_NOHALF) {
185 /* we want to immediately forward this close to the write side */
186 return stream_int_shutw(si);
187 }
Willy Tarreau0bd05ea2010-07-02 11:18:03 +0200188
Willy Tarreau4a36b562012-08-06 19:31:45 +0200189 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100190 if (!(si->flags & SI_FL_DONT_WAKE))
191 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200192}
193
Willy Tarreau4a36b562012-08-06 19:31:45 +0200194/*
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200195 * This function performs a shutdown-write on a detached stream interface in a
196 * connected or init state (it does nothing for other states). It either shuts
197 * the write side or marks itself as closed. The buffer flags are updated to
198 * reflect the new state. It does also close everything if the SI was marked as
199 * being in error state. The owner task is woken up if it exists.
Willy Tarreau4a36b562012-08-06 19:31:45 +0200200 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200201static void stream_int_shutw(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200202{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100203 struct channel *ic = si_ic(si);
204 struct channel *oc = si_oc(si);
205
206 oc->flags &= ~CF_SHUTW_NOW;
207 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200208 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100209 oc->flags |= CF_SHUTW;
210 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +0100211 si_done_get(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200212
Hongbo Longe39683c2017-03-10 18:41:51 +0100213 if (tick_isset(si->hcto)) {
214 ic->rto = si->hcto;
215 ic->rex = tick_add(now_ms, ic->rto);
216 }
217
Willy Tarreaufb90d942009-09-05 20:57:35 +0200218 switch (si->state) {
219 case SI_ST_EST:
Willy Tarreau4a36b562012-08-06 19:31:45 +0200220 /* we have to shut before closing, otherwise some short messages
221 * may never leave the system, especially when there are remaining
222 * unread data in the socket input buffer, or when nolinger is set.
223 * However, if SI_FL_NOLINGER is explicitly set, we know there is
224 * no risk so we close both sides immediately.
225 */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200226 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
Willy Tarreauafc8a222014-11-28 15:46:27 +0100227 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
Willy Tarreau6fe15412013-09-29 15:16:03 +0200228 return;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200229
230 /* fall through */
231 case SI_ST_CON:
232 case SI_ST_CER:
Willy Tarreau32d3ee92010-12-29 14:03:02 +0100233 case SI_ST_QUE:
234 case SI_ST_TAR:
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200235 /* Note that none of these states may happen with applets */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200236 si->state = SI_ST_DIS;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200237 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +0100238 si->flags &= ~SI_FL_NOLINGER;
239 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100240 ic->flags &= ~CF_SHUTR_NOW;
241 ic->flags |= CF_SHUTR;
242 ic->rex = TICK_ETERNITY;
Willy Tarreaufb90d942009-09-05 20:57:35 +0200243 si->exp = TICK_ETERNITY;
244 }
245
Willy Tarreau4a36b562012-08-06 19:31:45 +0200246 /* note that if the task exists, it must unregister itself once it runs */
Willy Tarreau07373b82014-11-28 12:08:47 +0100247 if (!(si->flags & SI_FL_DONT_WAKE))
248 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200249}
250
251/* default chk_rcv function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200252static void stream_int_chk_rcv(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200253{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100254 struct channel *ic = si_ic(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200255
Willy Tarreauafc8a222014-11-28 15:46:27 +0100256 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200257 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100258 si, si->state, ic->flags, si_oc(si)->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200259
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200260 if (ic->pipe) {
Willy Tarreaufb90d942009-09-05 20:57:35 +0200261 /* stop reading */
Willy Tarreaudb398432018-11-15 11:08:52 +0100262 si_rx_room_blk(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200263 }
264 else {
265 /* (re)start reading */
Olivier Houchard53216e72018-10-10 15:46:36 +0200266 tasklet_wakeup(si->wait_event.task);
Willy Tarreau07373b82014-11-28 12:08:47 +0100267 if (!(si->flags & SI_FL_DONT_WAKE))
268 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200269 }
270}
271
272/* default chk_snd function for scheduled tasks */
Willy Tarreauf873d752012-05-11 17:47:17 +0200273static void stream_int_chk_snd(struct stream_interface *si)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200274{
Willy Tarreauafc8a222014-11-28 15:46:27 +0100275 struct channel *oc = si_oc(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200276
Willy Tarreauafc8a222014-11-28 15:46:27 +0100277 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
Willy Tarreaufb90d942009-09-05 20:57:35 +0200278 __FUNCTION__,
Willy Tarreauafc8a222014-11-28 15:46:27 +0100279 si, si->state, si_ic(si)->flags, oc->flags);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200280
Willy Tarreauafc8a222014-11-28 15:46:27 +0100281 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaufb90d942009-09-05 20:57:35 +0200282 return;
283
284 if (!(si->flags & SI_FL_WAIT_DATA) || /* not waiting for data */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100285 channel_is_empty(oc)) /* called with nothing to send ! */
Willy Tarreaufb90d942009-09-05 20:57:35 +0200286 return;
287
288 /* Otherwise there are remaining data to be sent in the buffer,
289 * so we tell the handler.
290 */
291 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100292 if (!tick_isset(oc->wex))
293 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200294
Willy Tarreau07373b82014-11-28 12:08:47 +0100295 if (!(si->flags & SI_FL_DONT_WAKE))
296 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200297}
298
Willy Tarreaua9ff5e62015-07-19 18:46:30 +0200299/* Register an applet to handle a stream_interface as a new appctx. The SI will
300 * wake it up everytime it is solicited. The appctx must be deleted by the task
301 * handler using si_release_endpoint(), possibly from within the function itself.
302 * It also pre-initializes the applet's context and returns it (or NULL in case
303 * it could not be allocated).
Willy Tarreaufb90d942009-09-05 20:57:35 +0200304 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100305struct appctx *si_register_handler(struct stream_interface *si, struct applet *app)
Willy Tarreaufb90d942009-09-05 20:57:35 +0200306{
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100307 struct appctx *appctx;
308
Willy Tarreau07373b82014-11-28 12:08:47 +0100309 DPRINTF(stderr, "registering handler %p for si %p (was %p)\n", app, si, si_task(si));
Willy Tarreaufb90d942009-09-05 20:57:35 +0200310
Willy Tarreaua7513f52015-04-05 00:15:26 +0200311 appctx = si_alloc_appctx(si, app);
Willy Tarreaua69fc9f2014-12-22 19:34:00 +0100312 if (!appctx)
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100313 return NULL;
314
Willy Tarreau0cd3bd62018-11-06 18:46:37 +0100315 si_cant_get(si);
Willy Tarreau828824a2015-04-19 17:20:03 +0200316 appctx_wakeup(appctx);
Willy Tarreau1fbe1c92013-12-01 09:35:41 +0100317 return si_appctx(si);
Willy Tarreaufb90d942009-09-05 20:57:35 +0200318}
319
Willy Tarreau2c6be842012-07-06 17:12:34 +0200320/* This callback is used to send a valid PROXY protocol line to a socket being
Willy Tarreauafad0e02012-08-09 14:45:22 +0200321 * established. It returns 0 if it fails in a fatal way or needs to poll to go
322 * further, otherwise it returns non-zero and removes itself from the connection's
Willy Tarreaua1a74742012-08-24 12:14:49 +0200323 * flags (the bit is provided in <flag> by the caller). It is designed to be
324 * called by the connection handler and relies on it to commit polling changes.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200325 * Note that it can emit a PROXY line by relying on the other end's address
326 * when the connection is attached to a stream interface, or by resolving the
327 * local address otherwise (also called a LOCAL line).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200328 */
329int conn_si_send_proxy(struct connection *conn, unsigned int flag)
330{
Willy Tarreau2c6be842012-07-06 17:12:34 +0200331 /* we might have been called just after an asynchronous shutw */
Willy Tarreaua1a74742012-08-24 12:14:49 +0200332 if (conn->flags & CO_FL_SOCK_WR_SH)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200333 goto out_error;
334
Willy Tarreaud02cdd22013-12-15 10:23:20 +0100335 if (!conn_ctrl_ready(conn))
Willy Tarreauf79c8172013-10-21 16:30:56 +0200336 goto out_error;
337
Willy Tarreau2c6be842012-07-06 17:12:34 +0200338 /* If we have a PROXY line to send, we'll use this to validate the
339 * connection, in which case the connection is validated only once
340 * we've sent the whole proxy line. Otherwise we use connect().
341 */
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200342 while (conn->send_proxy_ofs) {
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100343 const struct conn_stream *cs;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200344 int ret;
345
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100346 cs = cs_get_first(conn);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200347 /* The target server expects a PROXY line to be sent first.
348 * If the send_proxy_ofs is negative, it corresponds to the
349 * offset to start sending from then end of the proxy string
350 * (which is recomputed every time since it's constant). If
351 * it is positive, it means we have to send from the start.
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200352 * We can only send a "normal" PROXY line when the connection
353 * is attached to a stream interface. Otherwise we can only
354 * send a LOCAL line (eg: for use with health checks).
Willy Tarreau2c6be842012-07-06 17:12:34 +0200355 */
Willy Tarreau6b1379f2018-11-18 21:38:19 +0100356
357 if (cs && cs->data_cb == &si_conn_cb) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200358 struct stream_interface *si = cs->data;
359 struct conn_stream *remote_cs = objt_cs(si_opposite(si)->end);
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200360 ret = make_proxy_line(trash.area, trash.size,
361 objt_server(conn->target),
362 remote_cs ? remote_cs->conn : NULL);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200363 }
364 else {
365 /* The target server expects a LOCAL line to be sent first. Retrieving
366 * local or remote addresses may fail until the connection is established.
367 */
368 conn_get_from_addr(conn);
369 if (!(conn->flags & CO_FL_ADDR_FROM_SET))
370 goto out_wait;
371
372 conn_get_to_addr(conn);
373 if (!(conn->flags & CO_FL_ADDR_TO_SET))
374 goto out_wait;
375
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200376 ret = make_proxy_line(trash.area, trash.size,
377 objt_server(conn->target), conn);
Willy Tarreau57cd3e42013-10-24 22:01:26 +0200378 }
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200379
Willy Tarreau2c6be842012-07-06 17:12:34 +0200380 if (!ret)
381 goto out_error;
382
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200383 if (conn->send_proxy_ofs > 0)
384 conn->send_proxy_ofs = -ret; /* first call */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200385
Willy Tarreaua1a74742012-08-24 12:14:49 +0200386 /* we have to send trash from (ret+sp for -sp bytes). If the
387 * data layer has a pending write, we'll also set MSG_MORE.
388 */
Willy Tarreau843b7cb2018-07-13 10:54:26 +0200389 ret = conn_sock_send(conn,
390 trash.area + ret + conn->send_proxy_ofs,
391 -conn->send_proxy_ofs,
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200392 (conn->flags & CO_FL_XPRT_WR_ENA) ? MSG_MORE : 0);
Willy Tarreau2c6be842012-07-06 17:12:34 +0200393
Willy Tarreau0a03c0f2015-03-13 00:05:28 +0100394 if (ret < 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200395 goto out_error;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200396
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200397 conn->send_proxy_ofs += ret; /* becomes zero once complete */
398 if (conn->send_proxy_ofs != 0)
Willy Tarreau2c6be842012-07-06 17:12:34 +0200399 goto out_wait;
400
401 /* OK we've sent the whole line, we're connected */
Willy Tarreau7fe45692013-12-04 23:37:56 +0100402 break;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200403 }
404
Willy Tarreaua1a74742012-08-24 12:14:49 +0200405 /* The connection is ready now, simply return and let the connection
406 * handler notify upper layers if needed.
Willy Tarreau2c6be842012-07-06 17:12:34 +0200407 */
408 if (conn->flags & CO_FL_WAIT_L4_CONN)
409 conn->flags &= ~CO_FL_WAIT_L4_CONN;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200410 conn->flags &= ~flag;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200411 return 1;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200412
413 out_error:
Willy Tarreauafad0e02012-08-09 14:45:22 +0200414 /* Write error on the file descriptor */
Willy Tarreau2c6be842012-07-06 17:12:34 +0200415 conn->flags |= CO_FL_ERROR;
Willy Tarreauafad0e02012-08-09 14:45:22 +0200416 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200417
418 out_wait:
Willy Tarreaua1a74742012-08-24 12:14:49 +0200419 __conn_sock_stop_recv(conn);
Willy Tarreauafad0e02012-08-09 14:45:22 +0200420 return 0;
Willy Tarreau2c6be842012-07-06 17:12:34 +0200421}
422
Willy Tarreau27375622013-12-17 00:00:28 +0100423
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100424/* This function is the equivalent to si_update() except that it's
Willy Tarreau615f28b2015-09-23 18:40:09 +0200425 * designed to be called from outside the stream handlers, typically the lower
426 * layers (applets, connections) after I/O completion. After updating the stream
427 * interface and timeouts, it will try to forward what can be forwarded, then to
428 * wake the associated task up if an important event requires special handling.
Willy Tarreaud0f5bbc2018-11-14 11:10:26 +0100429 * It may update SI_FL_WAIT_DATA and/or SI_FL_RXBLK_ROOM, that the callers are
Willy Tarreau0dfccb22018-10-25 13:55:20 +0200430 * encouraged to watch to take appropriate action.
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100431 * It should not be called from within the stream itself, si_update()
Willy Tarreau615f28b2015-09-23 18:40:09 +0200432 * is designed for this.
433 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100434static void stream_int_notify(struct stream_interface *si)
Willy Tarreau615f28b2015-09-23 18:40:09 +0200435{
436 struct channel *ic = si_ic(si);
437 struct channel *oc = si_oc(si);
Willy Tarreau47baeb82018-11-15 07:46:57 +0100438 struct stream_interface *sio = si_opposite(si);
Christopher Fauletd7607de2019-01-03 16:24:54 +0100439 struct task *task = si_task(si);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200440
441 /* process consumer side */
442 if (channel_is_empty(oc)) {
Olivier Houcharde9bed532017-11-16 17:49:25 +0100443 struct connection *conn = objt_cs(si->end) ? objt_cs(si->end)->conn : NULL;
444
Willy Tarreau615f28b2015-09-23 18:40:09 +0200445 if (((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW) &&
Olivier Houcharde9bed532017-11-16 17:49:25 +0100446 (si->state == SI_ST_EST) && (!conn || !(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS))))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200447 si_shutw(si);
448 oc->wex = TICK_ETERNITY;
449 }
450
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100451 /* indicate that we may be waiting for data from the output channel or
452 * we're about to close and can't expect more data if SHUTW_NOW is there.
453 */
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200454 if (!(oc->flags & (CF_SHUTW|CF_SHUTW_NOW)))
Willy Tarreau615f28b2015-09-23 18:40:09 +0200455 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreau8cf9c8e2016-12-13 15:21:25 +0100456 else if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW)
457 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200458
459 /* update OC timeouts and wake the other side up if it's waiting for room */
460 if (oc->flags & CF_WRITE_ACTIVITY) {
461 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
462 !channel_is_empty(oc))
463 if (tick_isset(oc->wex))
464 oc->wex = tick_add_ifset(now_ms, oc->wto);
465
466 if (!(si->flags & SI_FL_INDEP_STR))
467 if (tick_isset(ic->rex))
468 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreauf26c26c2018-11-12 16:11:08 +0100469 }
Willy Tarreau615f28b2015-09-23 18:40:09 +0200470
Willy Tarreau47baeb82018-11-15 07:46:57 +0100471 if ((sio->flags & SI_FL_RXBLK_ROOM) &&
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100472 ((oc->flags & CF_WRITE_PARTIAL) || channel_is_empty(oc)))
Willy Tarreaudb398432018-11-15 11:08:52 +0100473 si_rx_room_rdy(sio);
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100474
475 if (oc->flags & CF_DONT_READ)
476 si_rx_chan_blk(sio);
477 else
478 si_rx_chan_rdy(sio);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200479
480 /* Notify the other side when we've injected data into the IC that
481 * needs to be forwarded. We can do fast-forwarding as soon as there
482 * are output data, but we avoid doing this if some of the data are
483 * not yet scheduled for being forwarded, because it is very likely
484 * that it will be done again immediately afterwards once the following
Willy Tarreaud0f5bbc2018-11-14 11:10:26 +0100485 * data are parsed (eg: HTTP chunking). We only SI_FL_RXBLK_ROOM once
Willy Tarreau615f28b2015-09-23 18:40:09 +0200486 * we've emptied *some* of the output buffer, and not just when there
487 * is available room, because applets are often forced to stop before
488 * the buffer is full. We must not stop based on input data alone because
489 * an HTTP parser might need more data to complete the parsing.
490 */
491 if (!channel_is_empty(ic) &&
Willy Tarreau47baeb82018-11-15 07:46:57 +0100492 (sio->flags & SI_FL_WAIT_DATA) &&
Willy Tarreau89b6a2b2018-11-18 15:46:10 +0100493 (!(ic->flags & CF_EXPECT_MORE) || c_full(ic) || ci_data(ic) == 0 || ic->pipe)) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200494 int new_len, last_len;
495
Willy Tarreau77e478c2018-06-19 07:03:14 +0200496 last_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200497 if (ic->pipe)
498 last_len += ic->pipe->data;
499
Willy Tarreau47baeb82018-11-15 07:46:57 +0100500 si_chk_snd(sio);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200501
Willy Tarreau77e478c2018-06-19 07:03:14 +0200502 new_len = co_data(ic);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200503 if (ic->pipe)
504 new_len += ic->pipe->data;
505
506 /* check if the consumer has freed some space either in the
507 * buffer or in the pipe.
508 */
Willy Tarreau47baeb82018-11-15 07:46:57 +0100509 if (new_len < last_len)
Willy Tarreaudb398432018-11-15 11:08:52 +0100510 si_rx_room_rdy(si);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200511 }
512
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100513 if (!(ic->flags & CF_DONT_READ))
514 si_rx_chan_rdy(si);
515
Willy Tarreau47baeb82018-11-15 07:46:57 +0100516 si_chk_rcv(si);
517 si_chk_rcv(sio);
518
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100519 if (si_rx_blocked(si)) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200520 ic->rex = TICK_ETERNITY;
521 }
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100522 else if ((ic->flags & (CF_SHUTR|CF_READ_PARTIAL)) == CF_READ_PARTIAL) {
Willy Tarreau615f28b2015-09-23 18:40:09 +0200523 /* we must re-enable reading if si_chk_snd() has freed some space */
524 if (!(ic->flags & CF_READ_NOEXP) && tick_isset(ic->rex))
525 ic->rex = tick_add_ifset(now_ms, ic->rto);
526 }
527
528 /* wake the task up only when needed */
529 if (/* changes on the production side */
530 (ic->flags & (CF_READ_NULL|CF_READ_ERROR)) ||
Willy Tarreaub69f1712018-11-08 14:32:16 +0100531 (si->state != SI_ST_EST && si->state != SI_ST_CON) ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200532 (si->flags & SI_FL_ERR) ||
533 ((ic->flags & CF_READ_PARTIAL) &&
Willy Tarreau47baeb82018-11-15 07:46:57 +0100534 (!ic->to_forward || sio->state != SI_ST_EST)) ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200535
536 /* changes on the consumption side */
537 (oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR)) ||
Willy Tarreauede3d882018-10-24 17:17:56 +0200538 ((oc->flags & CF_WRITE_ACTIVITY) &&
Willy Tarreau615f28b2015-09-23 18:40:09 +0200539 ((oc->flags & CF_SHUTW) ||
Willy Tarreau78f5ff82018-12-19 11:00:00 +0100540 (((oc->flags & CF_WAKE_WRITE) ||
541 !(oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW|CF_SHUTW))) &&
Willy Tarreau47baeb82018-11-15 07:46:57 +0100542 (sio->state != SI_ST_EST ||
Willy Tarreau615f28b2015-09-23 18:40:09 +0200543 (channel_is_empty(oc) && !oc->to_forward)))))) {
Christopher Fauletd7607de2019-01-03 16:24:54 +0100544 task_wakeup(task, TASK_WOKEN_IO);
545 }
546 else {
547 /* Update expiration date for the task and requeue it */
548 task->expire = tick_first((tick_is_expired(task->expire, now_ms) ? 0 : task->expire),
549 tick_first(tick_first(ic->rex, ic->wex),
550 tick_first(oc->rex, oc->wex)));
551 task_queue(task);
Willy Tarreau615f28b2015-09-23 18:40:09 +0200552 }
553 if (ic->flags & CF_READ_ACTIVITY)
554 ic->flags &= ~CF_READ_DONTWAIT;
Willy Tarreau615f28b2015-09-23 18:40:09 +0200555}
556
557
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200558/* Called by I/O handlers after completion.. It propagates
Willy Tarreau651e1822015-09-23 20:06:13 +0200559 * connection flags to the stream interface, updates the stream (which may or
560 * may not take this opportunity to try to forward data), then update the
561 * connection's polling based on the channels and stream interface's final
562 * states. The function always returns 0.
Willy Tarreau100c4672012-08-20 12:06:26 +0200563 */
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200564static int si_cs_process(struct conn_stream *cs)
Willy Tarreaufd31e532012-07-23 18:24:25 +0200565{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200566 struct connection *conn = cs->conn;
567 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100568 struct channel *ic = si_ic(si);
569 struct channel *oc = si_oc(si);
Willy Tarreaufd31e532012-07-23 18:24:25 +0200570
Olivier Houchardc7ffa912018-08-28 19:37:41 +0200571 /* If we have data to send, try it now */
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100572 if (!channel_is_empty(oc) && !(si->wait_event.events & SUB_RETRY_SEND))
Willy Tarreau908d26f2018-10-25 14:02:47 +0200573 si_cs_send(cs);
574
Willy Tarreau651e1822015-09-23 20:06:13 +0200575 /* First step, report to the stream-int what was detected at the
576 * connection layer : errors and connection establishment.
577 */
Willy Tarreau4ff3b892017-10-16 15:17:17 +0200578 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Willy Tarreau3c55ec22012-07-23 19:19:51 +0200579 si->flags |= SI_FL_ERR;
580
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200581 /* If we had early data, and the handshake ended, then
582 * we can remove the flag, and attempt to wake the task up,
583 * in the event there's an analyser waiting for the end of
584 * the handshake.
585 */
Olivier Houchard6fa63d92017-11-27 18:41:32 +0100586 if (!(conn->flags & (CO_FL_HANDSHAKE | CO_FL_EARLY_SSL_HS)) &&
587 (cs->flags & CS_FL_WAIT_FOR_HS)) {
588 cs->flags &= ~CS_FL_WAIT_FOR_HS;
Olivier Houchardccaa7de2017-10-02 11:51:03 +0200589 task_wakeup(si_task(si), TASK_WOKEN_MSG);
590 }
591
Willy Tarreau52821e22017-03-18 17:11:37 +0100592 if ((si->state < SI_ST_EST) &&
593 (conn->flags & (CO_FL_CONNECTED | CO_FL_HANDSHAKE)) == CO_FL_CONNECTED) {
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200594 si->exp = TICK_ETERNITY;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100595 oc->flags |= CF_WRITE_NULL;
Willy Tarreau8f8c92f2012-07-23 19:45:44 +0200596 }
597
Willy Tarreau651e1822015-09-23 20:06:13 +0200598 /* Second step : update the stream-int and channels, try to forward any
599 * pending data, then possibly wake the stream up based on the new
600 * stream-int status.
Willy Tarreau44b5dc62012-08-24 12:12:53 +0200601 */
Willy Tarreau651e1822015-09-23 20:06:13 +0200602 stream_int_notify(si);
Christopher Fauleta73e59b2016-12-09 17:30:18 +0100603 channel_release_buffer(ic, &(si_strm(si)->buffer_wait));
Willy Tarreauea3cc482015-09-23 19:37:00 +0200604
Willy Tarreau2396c1c2012-10-03 21:12:16 +0200605 return 0;
Willy Tarreaufd31e532012-07-23 18:24:25 +0200606}
Willy Tarreau2c6be842012-07-06 17:12:34 +0200607
Willy Tarreau5368d802012-08-21 18:22:06 +0200608/*
609 * This function is called to send buffer data to a stream socket.
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200610 * It calls the mux layer's snd_buf function. It relies on the
Godbach4f489902013-12-04 17:24:06 +0800611 * caller to commit polling changes. The caller should check conn->flags
612 * for errors.
Willy Tarreau5368d802012-08-21 18:22:06 +0200613 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +0200614int si_cs_send(struct conn_stream *cs)
Willy Tarreau5368d802012-08-21 18:22:06 +0200615{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200616 struct connection *conn = cs->conn;
617 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100618 struct channel *oc = si_oc(si);
Willy Tarreau5368d802012-08-21 18:22:06 +0200619 int ret;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200620 int did_send = 0;
621
622 /* We're already waiting to be able to send, give up */
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100623 if (si->wait_event.events & SUB_RETRY_SEND)
Olivier Houchardf6535282018-08-31 17:29:12 +0200624 return 0;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200625
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100626 if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
627 si->flags |= SI_FL_ERR;
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200628 return 1;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100629 }
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200630
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200631 /* we might have been called just after an asynchronous shutw */
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100632 if (conn->flags & CO_FL_SOCK_WR_SH || oc->flags & CF_SHUTW)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200633 return 1;
Willy Tarreau5368d802012-08-21 18:22:06 +0200634
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200635 if (oc->pipe && conn->xprt->snd_pipe && conn->mux->snd_pipe) {
636 ret = conn->mux->snd_pipe(cs, oc->pipe);
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200637 if (ret > 0) {
Willy Tarreauede3d882018-10-24 17:17:56 +0200638 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200639 did_send = 1;
640 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200641
Willy Tarreauafc8a222014-11-28 15:46:27 +0100642 if (!oc->pipe->data) {
643 put_pipe(oc->pipe);
644 oc->pipe = NULL;
Willy Tarreau5368d802012-08-21 18:22:06 +0200645 }
646
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100647 if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
648 si->flags |= SI_FL_ERR;
Christopher Faulet5ed7aab2018-11-19 22:02:07 +0100649 return 1;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100650 }
Christopher Faulet3f76f4c2018-11-20 10:21:08 +0100651
652 if (oc->pipe)
653 goto end;
Willy Tarreau5368d802012-08-21 18:22:06 +0200654 }
655
656 /* At this point, the pipe is empty, but we may still have data pending
657 * in the normal buffer.
658 */
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100659 if (co_data(oc)) {
660 /* when we're here, we already know that there is no spliced
661 * data left, and that there are sendable buffered data.
662 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200663
Willy Tarreau5368d802012-08-21 18:22:06 +0200664 /* check if we want to inform the kernel that we're interested in
665 * sending more data after this call. We want this if :
666 * - we're about to close after this last send and want to merge
667 * the ongoing FIN with the last segment.
668 * - we know we can't send everything at once and must get back
669 * here because of unaligned data
670 * - there is still a finite amount of data to forward
671 * The test is arranged so that the most common case does only 2
672 * tests.
673 */
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100674 unsigned int send_flag = 0;
Willy Tarreau5368d802012-08-21 18:22:06 +0200675
Willy Tarreauafc8a222014-11-28 15:46:27 +0100676 if ((!(oc->flags & (CF_NEVER_WAIT|CF_SEND_DONTWAIT)) &&
677 ((oc->to_forward && oc->to_forward != CHN_INFINITE_FORWARD) ||
Willy Tarreau4ac49282017-10-17 16:33:46 +0200678 (oc->flags & CF_EXPECT_MORE))) ||
Willy Tarreauecd2e152017-11-07 15:07:25 +0100679 ((oc->flags & CF_ISRESP) &&
680 ((oc->flags & (CF_AUTO_CLOSE|CF_SHUTW_NOW)) == (CF_AUTO_CLOSE|CF_SHUTW_NOW))))
Willy Tarreau1049b1f2014-02-02 01:51:17 +0100681 send_flag |= CO_SFL_MSG_MORE;
Willy Tarreau5368d802012-08-21 18:22:06 +0200682
Willy Tarreauafc8a222014-11-28 15:46:27 +0100683 if (oc->flags & CF_STREAMER)
Willy Tarreau7bed9452014-02-02 02:00:24 +0100684 send_flag |= CO_SFL_STREAMER;
685
Olivier Houcharded0f2072018-08-16 15:41:52 +0200686 ret = cs->conn->mux->snd_buf(cs, &oc->buf, co_data(oc), send_flag);
Godbache68e02d2013-10-11 15:48:29 +0800687 if (ret > 0) {
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200688 did_send = 1;
Willy Tarreauede3d882018-10-24 17:17:56 +0200689 oc->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
Willy Tarreau5368d802012-08-21 18:22:06 +0200690
Willy Tarreau77e478c2018-06-19 07:03:14 +0200691 co_set_data(oc, co_data(oc) - ret);
Willy Tarreaudeccd112018-06-14 18:38:55 +0200692 c_realign_if_empty(oc);
693
694 if (!co_data(oc)) {
Godbache68e02d2013-10-11 15:48:29 +0800695 /* Always clear both flags once everything has been sent, they're one-shot */
Willy Tarreauafc8a222014-11-28 15:46:27 +0100696 oc->flags &= ~(CF_EXPECT_MORE | CF_SEND_DONTWAIT);
Godbache68e02d2013-10-11 15:48:29 +0800697 }
Willy Tarreau5368d802012-08-21 18:22:06 +0200698
Godbache68e02d2013-10-11 15:48:29 +0800699 /* if some data remain in the buffer, it's only because the
700 * system buffers are full, we will try next time.
701 */
Willy Tarreau5368d802012-08-21 18:22:06 +0200702 }
Christopher Faulete4acd5e2018-11-20 09:34:35 +0100703
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100704 if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
705 si->flags |= SI_FL_ERR;
Christopher Faulete4acd5e2018-11-20 09:34:35 +0100706 return 1;
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100707 }
Godbache68e02d2013-10-11 15:48:29 +0800708 }
Christopher Faulet55dec0d2018-11-20 10:30:02 +0100709
Willy Tarreauf6975aa2018-11-15 14:33:05 +0100710 end:
Olivier Houchard910b2bc2018-07-17 18:49:38 +0200711 /* 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 +0100712 if (!channel_is_empty(oc))
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100713 conn->mux->subscribe(cs, SUB_RETRY_SEND, &si->wait_event);
Olivier Houchardf6535282018-08-31 17:29:12 +0200714 return did_send;
Willy Tarreau5368d802012-08-21 18:22:06 +0200715}
716
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100717/* This is the ->process() function for any stream-interface's wait_event task.
718 * It's assigned during the stream-interface's initialization, for any type of
719 * stream interface. Thus it is always safe to perform a tasklet_wakeup() on a
720 * stream interface, as the presence of the CS is checked there.
721 */
Olivier Houchard91894cb2018-08-02 18:06:28 +0200722struct task *si_cs_io_cb(struct task *t, void *ctx, unsigned short state)
723{
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200724 struct stream_interface *si = ctx;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200725 struct conn_stream *cs = objt_cs(si->end);
Olivier Houchardf6535282018-08-31 17:29:12 +0200726 int ret = 0;
Olivier Houcharda6ff0352018-08-21 15:59:43 +0200727
728 if (!cs)
729 return NULL;
Willy Tarreau8ccd2082018-11-07 07:47:52 +0100730
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100731 if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchardf6535282018-08-31 17:29:12 +0200732 ret = si_cs_send(cs);
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100733 if (!(si->wait_event.events & SUB_RETRY_RECV))
Olivier Houchardf6535282018-08-31 17:29:12 +0200734 ret |= si_cs_recv(cs);
735 if (ret != 0)
Olivier Houchardc2aa7112018-09-11 18:27:21 +0200736 si_cs_process(cs);
Olivier Houchardf6535282018-08-31 17:29:12 +0200737
Olivier Houchard91894cb2018-08-02 18:06:28 +0200738 return (NULL);
739}
740
Willy Tarreau25f13102015-09-24 11:32:22 +0200741/* This function is designed to be called from within the stream handler to
742 * update the channels' expiration timers and the stream interface's flags
743 * based on the channels' flags. It needs to be called only once after the
744 * channels' flags have settled down, and before they are cleared, though it
745 * doesn't harm to call it as often as desired (it just slightly hurts
746 * performance). It must not be called from outside of the stream handler,
747 * as what it does will be used to compute the stream task's expiration.
748 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100749void si_update(struct stream_interface *si)
Willy Tarreau25f13102015-09-24 11:32:22 +0200750{
751 struct channel *ic = si_ic(si);
752 struct channel *oc = si_oc(si);
753
754 if (!(ic->flags & CF_SHUTR)) {
755 /* Read not closed, update FD status and timeout for reads */
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100756 if (ic->flags & CF_DONT_READ)
757 si_rx_chan_blk(si);
758 else
759 si_rx_chan_rdy(si);
760
761 if (!channel_is_empty(ic)) {
Willy Tarreauf26c26c2018-11-12 16:11:08 +0100762 /* stop reading, imposed by channel's policy or contents */
Willy Tarreaudb398432018-11-15 11:08:52 +0100763 si_rx_room_blk(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200764 }
Christopher Fauletb3e0de42018-10-11 13:54:13 +0200765 else {
Willy Tarreau25f13102015-09-24 11:32:22 +0200766 /* (re)start reading and update timeout. Note: we don't recompute the timeout
767 * everytime we get here, otherwise it would risk never to expire. We only
768 * update it if is was not yet set. The stream socket handler will already
769 * have updated it if there has been a completed I/O.
770 */
Willy Tarreaudb398432018-11-15 11:08:52 +0100771 si_rx_room_rdy(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200772 }
Willy Tarreaub26a6f92018-11-14 17:10:36 +0100773 if (si->flags & SI_FL_RXBLK_ANY & ~SI_FL_RX_WAIT_EP)
774 ic->rex = TICK_ETERNITY;
775 else if (!(ic->flags & CF_READ_NOEXP) && !tick_isset(ic->rex))
776 ic->rex = tick_add_ifset(now_ms, ic->rto);
777
Willy Tarreau47baeb82018-11-15 07:46:57 +0100778 si_chk_rcv(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200779 }
Willy Tarreauabb5d422018-11-14 16:58:52 +0100780 else
781 si_rx_shut_blk(si);
Willy Tarreau25f13102015-09-24 11:32:22 +0200782
783 if (!(oc->flags & CF_SHUTW)) {
784 /* Write not closed, update FD status and timeout for writes */
785 if (channel_is_empty(oc)) {
786 /* stop writing */
787 if (!(si->flags & SI_FL_WAIT_DATA)) {
788 if ((oc->flags & CF_SHUTW_NOW) == 0)
789 si->flags |= SI_FL_WAIT_DATA;
790 oc->wex = TICK_ETERNITY;
791 }
792 }
793 else {
794 /* (re)start writing and update timeout. Note: we don't recompute the timeout
795 * everytime we get here, otherwise it would risk never to expire. We only
796 * update it if is was not yet set. The stream socket handler will already
797 * have updated it if there has been a completed I/O.
798 */
799 si->flags &= ~SI_FL_WAIT_DATA;
800 if (!tick_isset(oc->wex)) {
801 oc->wex = tick_add_ifset(now_ms, oc->wto);
802 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
803 /* Note: depending on the protocol, we don't know if we're waiting
804 * for incoming data or not. So in order to prevent the socket from
805 * expiring read timeouts during writes, we refresh the read timeout,
806 * except if it was already infinite or if we have explicitly setup
807 * independent streams.
808 */
809 ic->rex = tick_add_ifset(now_ms, ic->rto);
810 }
811 }
812 }
813 }
814}
815
Willy Tarreaud14844a2018-11-08 18:15:29 +0100816/* updates both stream ints of a same stream at once */
817/* Updates at once the channel flags, and timers of both stream interfaces of a
818 * same stream, to complete the work after the analysers, then updates the data
819 * layer below. This will ensure that any synchronous update performed at the
820 * data layer will be reflected in the channel flags and/or stream-interface.
821 */
822void si_update_both(struct stream_interface *si_f, struct stream_interface *si_b)
823{
824 struct channel *req = si_ic(si_f);
825 struct channel *res = si_oc(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100826 struct conn_stream *cs;
Willy Tarreaud14844a2018-11-08 18:15:29 +0100827
828 req->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
829 res->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ATTACHED|CF_WRITE_NULL|CF_WRITE_PARTIAL);
830
831 si_f->flags &= ~(SI_FL_ERR|SI_FL_EXP);
832 si_b->flags &= ~(SI_FL_ERR|SI_FL_EXP);
833
834 si_f->prev_state = si_f->state;
835 si_b->prev_state = si_b->state;
836
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100837 /* front stream-int */
838 cs = objt_cs(si_f->end);
839 if (cs &&
840 si_f->state == SI_ST_EST &&
841 !(res->flags & CF_SHUTW) && /* Write not closed */
842 !channel_is_empty(res) &&
843 !(cs->flags & CS_FL_ERROR) &&
844 !(cs->conn->flags & CO_FL_ERROR)) {
845 if (si_cs_send(cs))
Willy Tarreaudb398432018-11-15 11:08:52 +0100846 si_rx_room_rdy(si_b);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100847 }
848
849 /* back stream-int */
850 cs = objt_cs(si_b->end);
851 if (cs &&
852 (si_b->state == SI_ST_EST || si_b->state == SI_ST_CON) &&
853 !(req->flags & CF_SHUTW) && /* Write not closed */
854 !channel_is_empty(req) &&
Willy Tarreaubddf7fc2018-12-19 17:17:10 +0100855 !(cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) &&
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100856 !(cs->conn->flags & CO_FL_ERROR)) {
857 if (si_cs_send(cs))
Willy Tarreaudb398432018-11-15 11:08:52 +0100858 si_rx_room_rdy(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100859 }
860
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100861 /* let's recompute both sides states */
862 if (si_f->state == SI_ST_EST)
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100863 si_update(si_f);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100864
865 if (si_b->state == SI_ST_EST)
Willy Tarreau14bfe9a2018-12-19 15:19:27 +0100866 si_update(si_b);
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100867
868 /* stream ints are processed outside of process_stream() and must be
869 * handled at the latest moment.
870 */
871 if (obj_type(si_f->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +0100872 ((si_rx_endp_ready(si_f) && !si_rx_blocked(si_f)) ||
873 (si_tx_endp_ready(si_f) && !si_tx_blocked(si_f))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100874 appctx_wakeup(si_appctx(si_f));
Willy Tarreaud14844a2018-11-08 18:15:29 +0100875
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100876 if (obj_type(si_b->end) == OBJ_TYPE_APPCTX &&
Willy Tarreau32742fd2018-11-14 14:07:59 +0100877 ((si_rx_endp_ready(si_b) && !si_rx_blocked(si_b)) ||
878 (si_tx_endp_ready(si_b) && !si_tx_blocked(si_b))))
Willy Tarreaubf89ff32018-11-09 14:59:25 +0100879 appctx_wakeup(si_appctx(si_b));
Willy Tarreaud14844a2018-11-08 18:15:29 +0100880}
881
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200882/*
883 * This function performs a shutdown-read on a stream interface attached to
884 * a connection in a connected or init state (it does nothing for other
885 * states). It either shuts the read side or marks itself as closed. The buffer
886 * flags are updated to reflect the new state. If the stream interface has
887 * SI_FL_NOHALF, we also forward the close to the write side. If a control
888 * layer is defined, then it is supposed to be a socket layer and file
Willy Tarreau6fe15412013-09-29 15:16:03 +0200889 * descriptors are then shutdown or closed accordingly. The function
890 * automatically disables polling if needed.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200891 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200892static void stream_int_shutr_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200893{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200894 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100895 struct channel *ic = si_ic(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200896
Willy Tarreauabb5d422018-11-14 16:58:52 +0100897 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100898 ic->flags &= ~CF_SHUTR_NOW;
899 if (ic->flags & CF_SHUTR)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200900 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100901 ic->flags |= CF_SHUTR;
902 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200903
904 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200905 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200906
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100907 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreaua553ae92017-10-05 18:52:17 +0200908 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200909 si->state = SI_ST_DIS;
910 si->exp = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200911 }
912 else if (si->flags & SI_FL_NOHALF) {
913 /* we want to immediately forward this close to the write side */
914 return stream_int_shutw_conn(si);
915 }
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200916}
917
918/*
919 * This function performs a shutdown-write on a stream interface attached to
920 * a connection in a connected or init state (it does nothing for other
921 * states). It either shuts the write side or marks itself as closed. The
922 * buffer flags are updated to reflect the new state. It does also close
923 * everything if the SI was marked as being in error state. If there is a
Willy Tarreau1398aa12015-03-12 23:04:07 +0100924 * data-layer shutdown, it is called.
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200925 */
Willy Tarreau6fe15412013-09-29 15:16:03 +0200926static void stream_int_shutw_conn(struct stream_interface *si)
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200927{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200928 struct conn_stream *cs = __objt_cs(si->end);
929 struct connection *conn = cs->conn;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100930 struct channel *ic = si_ic(si);
931 struct channel *oc = si_oc(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200932
Willy Tarreauafc8a222014-11-28 15:46:27 +0100933 oc->flags &= ~CF_SHUTW_NOW;
934 if (oc->flags & CF_SHUTW)
Willy Tarreau6fe15412013-09-29 15:16:03 +0200935 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +0100936 oc->flags |= CF_SHUTW;
937 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +0100938 si_done_get(si);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200939
Hongbo Longe39683c2017-03-10 18:41:51 +0100940 if (tick_isset(si->hcto)) {
941 ic->rto = si->hcto;
942 ic->rex = tick_add(now_ms, ic->rto);
943 }
944
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200945 switch (si->state) {
946 case SI_ST_EST:
947 /* we have to shut before closing, otherwise some short messages
948 * may never leave the system, especially when there are remaining
949 * unread data in the socket input buffer, or when nolinger is set.
950 * However, if SI_FL_NOLINGER is explicitly set, we know there is
951 * no risk so we close both sides immediately.
952 */
953 if (si->flags & SI_FL_ERR) {
954 /* quick close, the socket is alredy shut anyway */
955 }
956 else if (si->flags & SI_FL_NOLINGER) {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200957 /* unclean data-layer shutdown, typically an aborted request
958 * or a forwarded shutdown from a client to a server due to
959 * option abortonclose. No need for the TLS layer to try to
960 * emit a shutdown message.
961 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200962 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200963 }
964 else {
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200965 /* clean data-layer shutdown. This only happens on the
966 * frontend side, or on the backend side when forwarding
967 * a client close in TCP mode or in HTTP TUNNEL mode
968 * while option abortonclose is set. We want the TLS
969 * layer to try to signal it to the peer before we close.
970 */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200971 cs_shutw(cs, CS_SHW_NORMAL);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200972
Willy Tarreaua553ae92017-10-05 18:52:17 +0200973 if (!(ic->flags & (CF_SHUTR|CF_DONT_READ))) {
974 /* OK just a shutw, but we want the caller
975 * to disable polling on this FD if exists.
976 */
977 conn_cond_update_polling(conn);
978 return;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200979 }
980 }
981
982 /* fall through */
983 case SI_ST_CON:
984 /* we may have to close a pending connection, and mark the
985 * response buffer as shutr
986 */
Willy Tarreaua553ae92017-10-05 18:52:17 +0200987 cs_close(cs);
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200988 /* fall through */
989 case SI_ST_CER:
990 case SI_ST_QUE:
991 case SI_ST_TAR:
992 si->state = SI_ST_DIS;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +0200993 /* fall through */
Willy Tarreau8b3d7df2013-09-29 14:51:58 +0200994 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +0100995 si->flags &= ~SI_FL_NOLINGER;
996 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +0100997 ic->flags &= ~CF_SHUTR_NOW;
998 ic->flags |= CF_SHUTR;
999 ic->rex = TICK_ETERNITY;
Willy Tarreau8b3d7df2013-09-29 14:51:58 +02001000 si->exp = TICK_ETERNITY;
Willy Tarreau100c4672012-08-20 12:06:26 +02001001 }
1002}
1003
Willy Tarreau46a8d922012-08-20 12:38:36 +02001004/* This function is used for inter-stream-interface calls. It is called by the
1005 * consumer to inform the producer side that it may be interested in checking
1006 * for free space in the buffer. Note that it intentionally does not update
1007 * timeouts, so that we can still check them later at wake-up. This function is
1008 * dedicated to connection-based stream interfaces.
1009 */
Willy Tarreauc5788912012-08-24 18:12:41 +02001010static void stream_int_chk_rcv_conn(struct stream_interface *si)
Willy Tarreau46a8d922012-08-20 12:38:36 +02001011{
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001012 /* (re)start reading */
1013 tasklet_wakeup(si->wait_event.task);
Willy Tarreau46a8d922012-08-20 12:38:36 +02001014}
1015
1016
Willy Tarreaude5722c2012-08-20 15:01:10 +02001017/* This function is used for inter-stream-interface calls. It is called by the
1018 * producer to inform the consumer side that it may be interested in checking
1019 * for data in the buffer. Note that it intentionally does not update timeouts,
1020 * so that we can still check them later at wake-up.
1021 */
Willy Tarreauc5788912012-08-24 18:12:41 +02001022static void stream_int_chk_snd_conn(struct stream_interface *si)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001023{
Willy Tarreauafc8a222014-11-28 15:46:27 +01001024 struct channel *oc = si_oc(si);
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001025 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001026
Willy Tarreauafc8a222014-11-28 15:46:27 +01001027 if (unlikely(si->state > SI_ST_EST || (oc->flags & CF_SHUTW)))
Willy Tarreaude5722c2012-08-20 15:01:10 +02001028 return;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001029
Willy Tarreauafc8a222014-11-28 15:46:27 +01001030 if (unlikely(channel_is_empty(oc))) /* called with nothing to send ! */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001031 return;
1032
Willy Tarreauafc8a222014-11-28 15:46:27 +01001033 if (!oc->pipe && /* spliced data wants to be forwarded ASAP */
Willy Tarreaub0165872012-12-15 10:12:39 +01001034 !(si->flags & SI_FL_WAIT_DATA)) /* not waiting for data */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001035 return;
1036
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001037 if (!(si->wait_event.events & SUB_RETRY_SEND) && !channel_is_empty(si_oc(si)))
Olivier Houchard31f04e42018-10-22 16:01:09 +02001038 si_cs_send(cs);
Willy Tarreau33a09a52018-10-25 13:49:49 +02001039
Willy Tarreaubddf7fc2018-12-19 17:17:10 +01001040 if (cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING) || cs->conn->flags & CO_FL_ERROR) {
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001041 /* Write error on the file descriptor */
Willy Tarreau3b9c8502017-10-25 14:22:28 +02001042 si->flags |= SI_FL_ERR;
1043 goto out_wakeup;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001044 }
1045
1046 /* OK, so now we know that some data might have been sent, and that we may
1047 * have to poll first. We have to do that too if the buffer is not empty.
1048 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001049 if (channel_is_empty(oc)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001050 /* the connection is established but we can't write. Either the
1051 * buffer is empty, or we just refrain from sending because the
1052 * ->o limit was reached. Maybe we just wrote the last
1053 * chunk and need to close.
1054 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001055 if (((oc->flags & (CF_SHUTW|CF_AUTO_CLOSE|CF_SHUTW_NOW)) ==
Willy Tarreau03cdb7c2012-08-27 23:14:58 +02001056 (CF_AUTO_CLOSE|CF_SHUTW_NOW)) &&
Willy Tarreaude5722c2012-08-20 15:01:10 +02001057 (si->state == SI_ST_EST)) {
1058 si_shutw(si);
1059 goto out_wakeup;
1060 }
1061
Willy Tarreauafc8a222014-11-28 15:46:27 +01001062 if ((oc->flags & (CF_SHUTW|CF_SHUTW_NOW)) == 0)
Willy Tarreaude5722c2012-08-20 15:01:10 +02001063 si->flags |= SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001064 oc->wex = TICK_ETERNITY;
Willy Tarreaude5722c2012-08-20 15:01:10 +02001065 }
1066 else {
1067 /* Otherwise there are remaining data to be sent in the buffer,
1068 * which means we have to poll before doing so.
1069 */
Willy Tarreaude5722c2012-08-20 15:01:10 +02001070 si->flags &= ~SI_FL_WAIT_DATA;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001071 if (!tick_isset(oc->wex))
1072 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001073 }
1074
Willy Tarreauafc8a222014-11-28 15:46:27 +01001075 if (likely(oc->flags & CF_WRITE_ACTIVITY)) {
1076 struct channel *ic = si_ic(si);
1077
Willy Tarreaude5722c2012-08-20 15:01:10 +02001078 /* update timeout if we have written something */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001079 if ((oc->flags & (CF_SHUTW|CF_WRITE_PARTIAL)) == CF_WRITE_PARTIAL &&
1080 !channel_is_empty(oc))
1081 oc->wex = tick_add_ifset(now_ms, oc->wto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001082
Willy Tarreauafc8a222014-11-28 15:46:27 +01001083 if (tick_isset(ic->rex) && !(si->flags & SI_FL_INDEP_STR)) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001084 /* Note: to prevent the client from expiring read timeouts
1085 * during writes, we refresh it. We only do this if the
1086 * interface is not configured for "independent streams",
1087 * because for some applications it's better not to do this,
1088 * for instance when continuously exchanging small amounts
1089 * of data which can full the socket buffers long before a
1090 * write timeout is detected.
1091 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001092 ic->rex = tick_add_ifset(now_ms, ic->rto);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001093 }
1094 }
1095
1096 /* in case of special condition (error, shutdown, end of write...), we
1097 * have to notify the task.
1098 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001099 if (likely((oc->flags & (CF_WRITE_NULL|CF_WRITE_ERROR|CF_SHUTW)) ||
1100 ((oc->flags & CF_WAKE_WRITE) &&
1101 ((channel_is_empty(oc) && !oc->to_forward) ||
Willy Tarreaue6300be2014-01-25 02:33:21 +01001102 si->state != SI_ST_EST)))) {
Willy Tarreaude5722c2012-08-20 15:01:10 +02001103 out_wakeup:
Willy Tarreau07373b82014-11-28 12:08:47 +01001104 if (!(si->flags & SI_FL_DONT_WAKE))
1105 task_wakeup(si_task(si), TASK_WOKEN_IO);
Willy Tarreaude5722c2012-08-20 15:01:10 +02001106 }
1107}
1108
Willy Tarreaueecf6ca2012-08-20 15:09:53 +02001109/*
Willy Tarreauce323de2012-08-20 21:41:06 +02001110 * This is the callback which is called by the connection layer to receive data
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001111 * into the buffer from the connection. It iterates over the mux layer's
Willy Tarreauf7bc57c2012-10-03 00:19:48 +02001112 * rcv_buf function.
Willy Tarreauce323de2012-08-20 21:41:06 +02001113 */
Olivier Houchard0e367bb2018-09-14 19:41:13 +02001114int si_cs_recv(struct conn_stream *cs)
Willy Tarreauce323de2012-08-20 21:41:06 +02001115{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001116 struct connection *conn = cs->conn;
1117 struct stream_interface *si = cs->data;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001118 struct channel *ic = si_ic(si);
Olivier Houchardf6535282018-08-31 17:29:12 +02001119 int ret, max, cur_read = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001120 int read_poll = MAX_READ_POLL_LOOPS;
Christopher Fauletc6618d62018-10-11 15:56:04 +02001121 int flags = 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001122
Olivier Houchardf6535282018-08-31 17:29:12 +02001123 /* If another call to si_cs_recv() failed, and we subscribed to
1124 * recv events already, give up now.
1125 */
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001126 if (si->wait_event.events & SUB_RETRY_RECV)
Olivier Houchardf6535282018-08-31 17:29:12 +02001127 return 0;
Willy Tarreauce323de2012-08-20 21:41:06 +02001128
Willy Tarreauce323de2012-08-20 21:41:06 +02001129 /* maybe we were called immediately after an asynchronous shutr */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001130 if (ic->flags & CF_SHUTR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001131 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001132
Willy Tarreau54e917c2017-08-30 07:35:35 +02001133 /* stop here if we reached the end of data */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001134 if (cs->flags & CS_FL_EOS)
Willy Tarreau54e917c2017-08-30 07:35:35 +02001135 goto out_shutdown_r;
1136
Christopher Fauletf061e422018-12-07 14:51:20 +01001137 /* stop immediately on errors. Note that we DON'T want to stop on
1138 * POLL_ERR, as the poller might report a write error while there
1139 * are still data available in the recv buffer. This typically
1140 * happens when we send too large a request to a backend server
1141 * which rejects it before reading it all.
1142 */
1143 if (!(cs->flags & CS_FL_RCV_MORE)) {
1144 if (!conn_xprt_ready(conn))
1145 return 0;
1146 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
1147 return 1; // We want to make sure si_cs_wake() is called, so that process_strema is woken up, on failure
1148 }
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001149
Willy Tarreau7ab99a32018-12-18 09:15:43 +01001150 /* prepare to detect if the mux needs more room */
1151 cs->flags &= ~CS_FL_WANT_ROOM;
1152
Willy Tarreau77e478c2018-06-19 07:03:14 +02001153 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) && !co_data(ic) &&
Willy Tarreau7e312732014-02-12 16:35:14 +01001154 global.tune.idle_timer &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001155 (unsigned short)(now_ms - ic->last_read) >= global.tune.idle_timer) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001156 /* The buffer was empty and nothing was transferred for more
1157 * than one second. This was caused by a pause and not by
1158 * congestion. Reset any streaming mode to reduce latency.
1159 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001160 ic->xfer_small = 0;
1161 ic->xfer_large = 0;
1162 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001163 }
1164
Willy Tarreau96199b12012-08-24 00:46:52 +02001165 /* First, let's see if we may splice data across the channel without
1166 * using a buffer.
1167 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001168 if (conn->xprt->rcv_pipe && conn->mux->rcv_pipe &&
Willy Tarreauafc8a222014-11-28 15:46:27 +01001169 (ic->pipe || ic->to_forward >= MIN_SPLICE_FORWARD) &&
1170 ic->flags & CF_KERN_SPLICING) {
Willy Tarreaud760eec2018-07-10 09:50:25 +02001171 if (c_data(ic)) {
Willy Tarreau96199b12012-08-24 00:46:52 +02001172 /* We're embarrassed, there are already data pending in
1173 * the buffer and we don't want to have them at two
1174 * locations at a time. Let's indicate we need some
1175 * place and ask the consumer to hurry.
1176 */
Christopher Fauletc6618d62018-10-11 15:56:04 +02001177 flags |= CO_RFL_BUF_FLUSH;
Willy Tarreau96199b12012-08-24 00:46:52 +02001178 goto abort_splice;
1179 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001180
Willy Tarreauafc8a222014-11-28 15:46:27 +01001181 if (unlikely(ic->pipe == NULL)) {
1182 if (pipes_used >= global.maxpipes || !(ic->pipe = get_pipe())) {
1183 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001184 goto abort_splice;
1185 }
1186 }
1187
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001188 ret = conn->mux->rcv_pipe(cs, ic->pipe, ic->to_forward);
Willy Tarreau96199b12012-08-24 00:46:52 +02001189 if (ret < 0) {
1190 /* splice not supported on this end, let's disable it */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001191 ic->flags &= ~CF_KERN_SPLICING;
Willy Tarreau96199b12012-08-24 00:46:52 +02001192 goto abort_splice;
1193 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001194
Willy Tarreau96199b12012-08-24 00:46:52 +02001195 if (ret > 0) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001196 if (ic->to_forward != CHN_INFINITE_FORWARD)
1197 ic->to_forward -= ret;
1198 ic->total += ret;
Willy Tarreau96199b12012-08-24 00:46:52 +02001199 cur_read += ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001200 ic->flags |= CF_READ_PARTIAL;
Willy Tarreauce323de2012-08-20 21:41:06 +02001201 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001202
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001203 if (cs->flags & CS_FL_EOS)
Willy Tarreau96199b12012-08-24 00:46:52 +02001204 goto out_shutdown_r;
1205
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001206 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001207 return 1;
Willy Tarreau96199b12012-08-24 00:46:52 +02001208
Willy Tarreau61d39a02013-07-18 21:49:32 +02001209 if (conn->flags & CO_FL_WAIT_ROOM) {
1210 /* the pipe is full or we have read enough data that it
1211 * could soon be full. Let's stop before needing to poll.
1212 */
Willy Tarreaudb398432018-11-15 11:08:52 +01001213 si_rx_room_blk(si);
Willy Tarreauffb12052018-11-15 16:06:02 +01001214 goto done_recv;
Willy Tarreau61d39a02013-07-18 21:49:32 +02001215 }
Willy Tarreau56a77e52012-09-02 18:34:44 +02001216
Willy Tarreauce323de2012-08-20 21:41:06 +02001217 /* splice not possible (anymore), let's go on on standard copy */
1218 }
Willy Tarreau81464b42018-11-15 15:52:53 +01001219 else {
1220 /* be sure not to block regular receive path below */
1221 conn->flags &= ~CO_FL_WAIT_ROOM;
1222 }
Willy Tarreau96199b12012-08-24 00:46:52 +02001223
1224 abort_splice:
Willy Tarreauafc8a222014-11-28 15:46:27 +01001225 if (ic->pipe && unlikely(!ic->pipe->data)) {
1226 put_pipe(ic->pipe);
1227 ic->pipe = NULL;
Willy Tarreau96199b12012-08-24 00:46:52 +02001228 }
1229
Christopher Fauleta73e59b2016-12-09 17:30:18 +01001230 /* now we'll need a input buffer for the stream */
Willy Tarreau581abd32018-10-25 10:21:41 +02001231 if (!si_alloc_ibuf(si, &(si_strm(si)->buffer_wait)))
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001232 goto end_recv;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001233
Willy Tarreau61d39a02013-07-18 21:49:32 +02001234 /* Important note : if we're called with POLL_IN|POLL_HUP, it means the read polling
1235 * was enabled, which implies that the recv buffer was not full. So we have a guarantee
1236 * that if such an event is not handled above in splice, it will be handled here by
1237 * recv().
1238 */
Olivier Houchardc490efd2018-12-04 15:46:16 +01001239 while ((cs->flags & CS_FL_RCV_MORE) ||
1240 (!(conn->flags & (CO_FL_ERROR | CO_FL_WAIT_ROOM | CO_FL_HANDSHAKE)) &&
1241 (!(cs->flags & (CS_FL_ERROR|CS_FL_EOS))) && !(ic->flags & CF_SHUTR))) {
Christopher Faulet4eb7d742018-10-11 15:29:21 +02001242 /* <max> may be null. This is the mux responsibility to set
1243 * CS_FL_RCV_MORE on the CS if more space is needed.
1244 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001245 max = channel_recv_max(ic);
Christopher Faulet72d91252018-10-17 11:08:23 +02001246 ret = cs->conn->mux->rcv_buf(cs, &ic->buf, max,
1247 flags |
1248 (co_data(ic) ? CO_RFL_BUF_WET : 0) |
1249 ((channel_recv_limit(ic) < b_size(&ic->buf)) ? CO_RFL_KEEP_RSV : 0));
Willy Tarreau674e0ad2018-12-05 13:45:41 +01001250
Olivier Houchardd247be02018-12-06 16:22:29 +01001251 if (cs->flags & CS_FL_WANT_ROOM)
Willy Tarreaudb398432018-11-15 11:08:52 +01001252 si_rx_room_blk(si);
Willy Tarreau6577b482017-12-10 21:19:33 +01001253
Christopher Fauleteffc3752018-10-31 08:53:54 +01001254 if (cs->flags & CS_FL_READ_PARTIAL) {
1255 if (tick_isset(ic->rex))
1256 ic->rex = tick_add_ifset(now_ms, ic->rto);
1257 cs->flags &= ~CS_FL_READ_PARTIAL;
1258 }
1259
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001260 if (ret <= 0) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001261 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001262 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001263
1264 cur_read += ret;
1265
1266 /* if we're allowed to directly forward data, we must update ->o */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001267 if (ic->to_forward && !(ic->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001268 unsigned long fwd = ret;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001269 if (ic->to_forward != CHN_INFINITE_FORWARD) {
1270 if (fwd > ic->to_forward)
1271 fwd = ic->to_forward;
1272 ic->to_forward -= fwd;
Willy Tarreauce323de2012-08-20 21:41:06 +02001273 }
Willy Tarreaubcbd3932018-06-06 07:13:22 +02001274 c_adv(ic, fwd);
Willy Tarreauce323de2012-08-20 21:41:06 +02001275 }
1276
Willy Tarreauafc8a222014-11-28 15:46:27 +01001277 ic->flags |= CF_READ_PARTIAL;
1278 ic->total += ret;
Willy Tarreauce323de2012-08-20 21:41:06 +02001279
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001280 if ((ic->flags & CF_READ_DONTWAIT) || --read_poll <= 0) {
1281 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001282 si_rx_chan_blk(si);
Willy Tarreau62dd6982017-11-18 11:26:20 +01001283 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001284 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001285
1286 /* if too many bytes were missing from last read, it means that
1287 * it's pointless trying to read again because the system does
1288 * not have them in buffers.
1289 */
1290 if (ret < max) {
Willy Tarreauce323de2012-08-20 21:41:06 +02001291 /* if a streamer has read few data, it may be because we
1292 * have exhausted system buffers. It's not worth trying
1293 * again.
1294 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001295 if (ic->flags & CF_STREAMER) {
1296 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001297 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001298 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001299 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001300
1301 /* if we read a large block smaller than what we requested,
1302 * it's almost certain we'll never get anything more.
1303 */
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001304 if (ret >= global.tune.recv_enough) {
1305 /* we're stopped by the channel's policy */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001306 si_rx_chan_blk(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001307 break;
Willy Tarreauf26c26c2018-11-12 16:11:08 +01001308 }
Willy Tarreauce323de2012-08-20 21:41:06 +02001309 }
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001310
1311 /* if we are waiting for more space, don't try to read more data
1312 * right now.
1313 */
Willy Tarreaub26a6f92018-11-14 17:10:36 +01001314 if (si_rx_blocked(si))
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001315 break;
Willy Tarreauce323de2012-08-20 21:41:06 +02001316 } /* while !flags */
1317
Willy Tarreauffb12052018-11-15 16:06:02 +01001318 done_recv:
Willy Tarreauc5890e62014-02-09 17:47:01 +01001319 if (cur_read) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001320 if ((ic->flags & (CF_STREAMER | CF_STREAMER_FAST)) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001321 (cur_read <= ic->buf.size / 2)) {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001322 ic->xfer_large = 0;
1323 ic->xfer_small++;
1324 if (ic->xfer_small >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001325 /* we have read less than half of the buffer in
1326 * one pass, and this happened at least 3 times.
1327 * This is definitely not a streamer.
1328 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001329 ic->flags &= ~(CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001330 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001331 else if (ic->xfer_small >= 2) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001332 /* if the buffer has been at least half full twice,
1333 * we receive faster than we send, so at least it
1334 * is not a "fast streamer".
1335 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001336 ic->flags &= ~CF_STREAMER_FAST;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001337 }
1338 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001339 else if (!(ic->flags & CF_STREAMER_FAST) &&
Willy Tarreauc9fa0482018-07-10 17:43:27 +02001340 (cur_read >= ic->buf.size - global.tune.maxrewrite)) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001341 /* we read a full buffer at once */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001342 ic->xfer_small = 0;
1343 ic->xfer_large++;
1344 if (ic->xfer_large >= 3) {
Willy Tarreauc5890e62014-02-09 17:47:01 +01001345 /* we call this buffer a fast streamer if it manages
1346 * to be filled in one call 3 consecutive times.
1347 */
Willy Tarreauafc8a222014-11-28 15:46:27 +01001348 ic->flags |= (CF_STREAMER | CF_STREAMER_FAST);
Willy Tarreauc5890e62014-02-09 17:47:01 +01001349 }
1350 }
1351 else {
Willy Tarreauafc8a222014-11-28 15:46:27 +01001352 ic->xfer_small = 0;
1353 ic->xfer_large = 0;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001354 }
Willy Tarreauafc8a222014-11-28 15:46:27 +01001355 ic->last_read = now_ms;
Willy Tarreauc5890e62014-02-09 17:47:01 +01001356 }
1357
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001358 end_recv:
Willy Tarreau4ff3b892017-10-16 15:17:17 +02001359 if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001360 return 1;
Willy Tarreau10fc09e2014-11-25 19:46:36 +01001361
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001362 if (cs->flags & CS_FL_EOS)
Willy Tarreauce323de2012-08-20 21:41:06 +02001363 /* connection closed */
1364 goto out_shutdown_r;
1365
Willy Tarreau32742fd2018-11-14 14:07:59 +01001366 /* Subscribe to receive events if we're blocking on I/O */
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001367 if (!si_rx_blocked(si)) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +01001368 conn->mux->subscribe(cs, SUB_RETRY_RECV, &si->wait_event);
Willy Tarreaudd5621a2018-11-15 16:55:14 +01001369 si_rx_endp_done(si);
1370 } else {
1371 si_rx_endp_more(si);
1372 }
Olivier Houchardf6535282018-08-31 17:29:12 +02001373
Willy Tarreau32742fd2018-11-14 14:07:59 +01001374 return (cur_read != 0) || si_rx_blocked(si);
Willy Tarreauce323de2012-08-20 21:41:06 +02001375
1376 out_shutdown_r:
Olivier Houchardfd0c2dc2018-12-13 15:38:16 +01001377 if (conn->flags & CO_FL_CONNECTED) {
1378 /* we received a shutdown */
1379 ic->flags |= CF_READ_NULL;
1380 if (ic->flags & CF_AUTO_CLOSE)
1381 channel_shutw_now(ic);
Willy Tarreau14bfe9a2018-12-19 15:19:27 +01001382 stream_int_read0(si);
Olivier Houchardfd0c2dc2018-12-13 15:38:16 +01001383 }
Olivier Houchardc2aa7112018-09-11 18:27:21 +02001384 return 1;
Willy Tarreauce323de2012-08-20 21:41:06 +02001385}
1386
1387/*
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001388 * This function propagates a null read received on a socket-based connection.
1389 * It updates the stream interface. If the stream interface has SI_FL_NOHALF,
Willy Tarreau11405122015-03-12 22:32:27 +01001390 * the close is also forwarded to the write side as an abort.
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001391 */
Willy Tarreau14bfe9a2018-12-19 15:19:27 +01001392static void stream_int_read0(struct stream_interface *si)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001393{
Olivier Houchard9aaf7782017-09-13 18:30:23 +02001394 struct conn_stream *cs = __objt_cs(si->end);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001395 struct channel *ic = si_ic(si);
1396 struct channel *oc = si_oc(si);
Willy Tarreaub363a1f2013-10-01 10:45:07 +02001397
Willy Tarreauabb5d422018-11-14 16:58:52 +01001398 si_rx_shut_blk(si);
Willy Tarreauafc8a222014-11-28 15:46:27 +01001399 ic->flags &= ~CF_SHUTR_NOW;
1400 if (ic->flags & CF_SHUTR)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001401 return;
Willy Tarreauafc8a222014-11-28 15:46:27 +01001402 ic->flags |= CF_SHUTR;
1403 ic->rex = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001404
1405 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1406 return;
1407
Willy Tarreauafc8a222014-11-28 15:46:27 +01001408 if (oc->flags & CF_SHUTW)
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001409 goto do_close;
1410
1411 if (si->flags & SI_FL_NOHALF) {
1412 /* we want to immediately forward this close to the write side */
Willy Tarreau87b09662015-04-03 00:22:06 +02001413 /* force flag on ssl to keep stream in cache */
Willy Tarreauecdb3fe2017-10-05 15:25:48 +02001414 cs_shutw(cs, CS_SHW_SILENT);
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001415 goto do_close;
1416 }
1417
1418 /* otherwise that's just a normal read shutdown */
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001419 return;
1420
1421 do_close:
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001422 /* OK we completely close the socket here just as if we went through si_shut[rw]() */
Willy Tarreaua553ae92017-10-05 18:52:17 +02001423 cs_close(cs);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001424
Willy Tarreauafc8a222014-11-28 15:46:27 +01001425 oc->flags &= ~CF_SHUTW_NOW;
1426 oc->flags |= CF_SHUTW;
1427 oc->wex = TICK_ETERNITY;
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001428
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001429 si_done_get(si);
Willy Tarreauf9fbfe82012-11-21 21:51:53 +01001430
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001431 si->state = SI_ST_DIS;
1432 si->exp = TICK_ETERNITY;
Willy Tarreau9bf9c142012-08-20 15:38:41 +02001433 return;
1434}
1435
Willy Tarreau651e1822015-09-23 20:06:13 +02001436/* Callback to be used by applet handlers upon completion. It updates the stream
1437 * (which may or may not take this opportunity to try to forward data), then
Emeric Brun2802b072017-06-30 14:11:56 +02001438 * may re-enable the applet's based on the channels and stream interface's final
Willy Tarreau651e1822015-09-23 20:06:13 +02001439 * states.
1440 */
Willy Tarreauaa977ba2015-09-25 11:45:06 +02001441void si_applet_wake_cb(struct stream_interface *si)
Willy Tarreaue5f86492015-04-19 15:16:35 +02001442{
Willy Tarreaueca572f2015-09-25 19:11:55 +02001443 struct channel *ic = si_ic(si);
1444
1445 /* If the applet wants to write and the channel is closed, it's a
1446 * broken pipe and it must be reported.
1447 */
Willy Tarreau05b9b642018-11-14 13:43:35 +01001448 if (!(si->flags & SI_FL_RX_WAIT_EP) && (ic->flags & CF_SHUTR))
Willy Tarreaueca572f2015-09-25 19:11:55 +02001449 si->flags |= SI_FL_ERR;
1450
Willy Tarreau186dcdd2018-11-16 16:18:34 +01001451 /* automatically mark the applet having data available if it reported
1452 * begin blocked by the channel.
1453 */
1454 if (si_rx_blocked(si))
1455 si_rx_endp_more(si);
1456
Willy Tarreau651e1822015-09-23 20:06:13 +02001457 /* update the stream-int, channels, and possibly wake the stream up */
1458 stream_int_notify(si);
Willy Tarreaue5f86492015-04-19 15:16:35 +02001459
Willy Tarreau32742fd2018-11-14 14:07:59 +01001460 /* stream_int_notify may have passed through chk_snd and released some
1461 * RXBLK flags. Process_stream will consider those flags to wake up the
1462 * appctx but in the case the task is not in runqueue we may have to
1463 * wakeup the appctx immediately.
Emeric Brun2802b072017-06-30 14:11:56 +02001464 */
Willy Tarreaud0d40eb2018-11-09 14:56:01 +01001465 if (!task_in_rq(si_task(si)) &&
Willy Tarreau32742fd2018-11-14 14:07:59 +01001466 ((si_rx_endp_ready(si) && !si_rx_blocked(si)) ||
1467 (si_tx_endp_ready(si) && !si_tx_blocked(si))))
Willy Tarreau563cc372015-04-19 18:13:56 +02001468 appctx_wakeup(si_appctx(si));
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001469}
1470
1471/*
1472 * This function performs a shutdown-read on a stream interface attached to an
1473 * applet in a connected or init state (it does nothing for other states). It
1474 * either shuts the read side or marks itself as closed. The buffer flags are
1475 * updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
1476 * we also forward the close to the write side. The owner task is woken up if
1477 * it exists.
1478 */
1479static void stream_int_shutr_applet(struct stream_interface *si)
1480{
1481 struct channel *ic = si_ic(si);
1482
Willy Tarreauabb5d422018-11-14 16:58:52 +01001483 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001484 ic->flags &= ~CF_SHUTR_NOW;
1485 if (ic->flags & CF_SHUTR)
1486 return;
1487 ic->flags |= CF_SHUTR;
1488 ic->rex = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001489
Willy Tarreau828824a2015-04-19 17:20:03 +02001490 /* Note: on shutr, we don't call the applet */
1491
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001492 if (si->state != SI_ST_EST && si->state != SI_ST_CON)
1493 return;
1494
1495 if (si_oc(si)->flags & CF_SHUTW) {
Willy Tarreau958f0742015-09-25 20:24:26 +02001496 si_applet_release(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001497 si->state = SI_ST_DIS;
1498 si->exp = TICK_ETERNITY;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001499 }
1500 else if (si->flags & SI_FL_NOHALF) {
1501 /* we want to immediately forward this close to the write side */
1502 return stream_int_shutw_applet(si);
1503 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001504}
1505
1506/*
1507 * This function performs a shutdown-write on a stream interface attached to an
1508 * applet in a connected or init state (it does nothing for other states). It
1509 * either shuts the write side or marks itself as closed. The buffer flags are
1510 * updated to reflect the new state. It does also close everything if the SI
1511 * was marked as being in error state. The owner task is woken up if it exists.
1512 */
1513static void stream_int_shutw_applet(struct stream_interface *si)
1514{
1515 struct channel *ic = si_ic(si);
1516 struct channel *oc = si_oc(si);
1517
1518 oc->flags &= ~CF_SHUTW_NOW;
1519 if (oc->flags & CF_SHUTW)
1520 return;
1521 oc->flags |= CF_SHUTW;
1522 oc->wex = TICK_ETERNITY;
Willy Tarreau43e69dc2018-11-06 19:23:03 +01001523 si_done_get(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001524
Hongbo Longe39683c2017-03-10 18:41:51 +01001525 if (tick_isset(si->hcto)) {
1526 ic->rto = si->hcto;
1527 ic->rex = tick_add(now_ms, ic->rto);
1528 }
1529
Willy Tarreau828824a2015-04-19 17:20:03 +02001530 /* on shutw we always wake the applet up */
1531 appctx_wakeup(si_appctx(si));
1532
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001533 switch (si->state) {
1534 case SI_ST_EST:
1535 /* we have to shut before closing, otherwise some short messages
1536 * may never leave the system, especially when there are remaining
1537 * unread data in the socket input buffer, or when nolinger is set.
1538 * However, if SI_FL_NOLINGER is explicitly set, we know there is
1539 * no risk so we close both sides immediately.
1540 */
1541 if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
1542 !(ic->flags & (CF_SHUTR|CF_DONT_READ)))
1543 return;
1544
1545 /* fall through */
1546 case SI_ST_CON:
1547 case SI_ST_CER:
1548 case SI_ST_QUE:
1549 case SI_ST_TAR:
1550 /* Note that none of these states may happen with applets */
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001551 si_applet_release(si);
Willy Tarreau958f0742015-09-25 20:24:26 +02001552 si->state = SI_ST_DIS;
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001553 default:
Willy Tarreauabb5d422018-11-14 16:58:52 +01001554 si->flags &= ~SI_FL_NOLINGER;
1555 si_rx_shut_blk(si);
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001556 ic->flags &= ~CF_SHUTR_NOW;
1557 ic->flags |= CF_SHUTR;
1558 ic->rex = TICK_ETERNITY;
1559 si->exp = TICK_ETERNITY;
1560 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001561}
1562
1563/* chk_rcv function for applets */
1564static void stream_int_chk_rcv_applet(struct stream_interface *si)
1565{
1566 struct channel *ic = si_ic(si);
1567
1568 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1569 __FUNCTION__,
1570 si, si->state, ic->flags, si_oc(si)->flags);
1571
Christopher Fauletb3e0de42018-10-11 13:54:13 +02001572 if (!ic->pipe) {
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001573 /* (re)start reading */
Willy Tarreau828824a2015-04-19 17:20:03 +02001574 appctx_wakeup(si_appctx(si));
Thierry FOURNIER5bc2cbf2015-09-04 18:40:36 +02001575 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001576}
1577
1578/* chk_snd function for applets */
1579static void stream_int_chk_snd_applet(struct stream_interface *si)
1580{
1581 struct channel *oc = si_oc(si);
1582
1583 DPRINTF(stderr, "%s: si=%p, si->state=%d ic->flags=%08x oc->flags=%08x\n",
1584 __FUNCTION__,
1585 si, si->state, si_ic(si)->flags, oc->flags);
1586
1587 if (unlikely(si->state != SI_ST_EST || (oc->flags & CF_SHUTW)))
1588 return;
1589
Willy Tarreau828824a2015-04-19 17:20:03 +02001590 /* we only wake the applet up if it was waiting for some data */
1591
1592 if (!(si->flags & SI_FL_WAIT_DATA))
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001593 return;
1594
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001595 if (!tick_isset(oc->wex))
1596 oc->wex = tick_add_ifset(now_ms, oc->wto);
1597
Willy Tarreau828824a2015-04-19 17:20:03 +02001598 if (!channel_is_empty(oc)) {
1599 /* (re)start sending */
1600 appctx_wakeup(si_appctx(si));
1601 }
Willy Tarreaud45b9f82015-04-13 16:30:14 +02001602}
1603
Willy Tarreaudded32d2008-11-30 19:48:07 +01001604/*
Willy Tarreaucff64112008-11-03 06:26:53 +01001605 * Local variables:
1606 * c-indent-level: 8
1607 * c-basic-offset: 8
1608 * End:
1609 */