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Willy Tarreaucff64112008-11-03 06:26:53 +01001/*
Willy Tarreau8e89b842009-10-18 23:56:35 +02002 * include/proto/stream_interface.h
3 * This file contains stream_interface function prototypes
4 *
Willy Tarreau2bb4a962014-11-28 11:11:05 +01005 * Copyright (C) 2000-2014 Willy Tarreau - w@1wt.eu
Willy Tarreau8e89b842009-10-18 23:56:35 +02006 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation, version 2.1
10 * exclusively.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
Willy Tarreaucff64112008-11-03 06:26:53 +010021
22#ifndef _PROTO_STREAM_INTERFACE_H
23#define _PROTO_STREAM_INTERFACE_H
24
25#include <stdlib.h>
26
27#include <common/config.h>
Willy Tarreau323a2d92015-08-04 19:00:17 +020028#include <types/server.h>
Willy Tarreau87b09662015-04-03 00:22:06 +020029#include <types/stream.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010030#include <types/stream_interface.h>
Willy Tarreau8a8d83b2015-04-13 13:24:54 +020031#include <proto/applet.h>
Willy Tarreau14f8e862012-08-30 22:23:13 +020032#include <proto/channel.h>
Willy Tarreauf9dabec2012-08-17 17:33:53 +020033#include <proto/connection.h>
Willy Tarreaucff64112008-11-03 06:26:53 +010034
35
36/* main event functions used to move data between sockets and buffers */
Willy Tarreau269358d2009-09-20 20:14:49 +020037int stream_int_check_timeouts(struct stream_interface *si);
Willy Tarreaucff64112008-11-03 06:26:53 +010038void stream_int_report_error(struct stream_interface *si);
Willy Tarreau83061a82018-07-13 11:56:34 +020039void stream_int_retnclose(struct stream_interface *si,
40 const struct buffer *msg);
Willy Tarreau2c6be842012-07-06 17:12:34 +020041int conn_si_send_proxy(struct connection *conn, unsigned int flag);
Willy Tarreau9bf9c142012-08-20 15:38:41 +020042void stream_sock_read0(struct stream_interface *si);
Willy Tarreaucff64112008-11-03 06:26:53 +010043
Willy Tarreauc5788912012-08-24 18:12:41 +020044extern struct si_ops si_embedded_ops;
Willy Tarreauc5788912012-08-24 18:12:41 +020045extern struct si_ops si_conn_ops;
Willy Tarreaud45b9f82015-04-13 16:30:14 +020046extern struct si_ops si_applet_ops;
Willy Tarreau74beec32012-10-03 00:41:04 +020047extern struct data_cb si_conn_cb;
Willy Tarreau27375622013-12-17 00:00:28 +010048extern struct data_cb si_idle_conn_cb;
Willy Tarreau5c979a92012-05-07 17:15:39 +020049
Willy Tarreau30576452015-04-13 13:50:30 +020050struct appctx *stream_int_register_handler(struct stream_interface *si, struct applet *app);
Willy Tarreauaa977ba2015-09-25 11:45:06 +020051void si_applet_wake_cb(struct stream_interface *si);
Willy Tarreau25f13102015-09-24 11:32:22 +020052void stream_int_update(struct stream_interface *si);
Willy Tarreaucbc32602015-09-25 11:01:42 +020053void stream_int_update_conn(struct stream_interface *si);
54void stream_int_update_applet(struct stream_interface *si);
Willy Tarreau615f28b2015-09-23 18:40:09 +020055void stream_int_notify(struct stream_interface *si);
Olivier Houchard0e367bb2018-09-14 19:41:13 +020056int si_cs_recv(struct conn_stream *cs);
57int si_cs_send(struct conn_stream *cs);
Olivier Houchard91894cb2018-08-02 18:06:28 +020058struct task *si_cs_io_cb(struct task *t, void *ctx, unsigned short state);
Willy Tarreaufb90d942009-09-05 20:57:35 +020059
Willy Tarreau2bb4a962014-11-28 11:11:05 +010060/* returns the channel which receives data from this stream interface (input channel) */
61static inline struct channel *si_ic(struct stream_interface *si)
62{
Willy Tarreau0b2fb7f2014-11-28 11:50:38 +010063 if (si->flags & SI_FL_ISBACK)
Willy Tarreau87b09662015-04-03 00:22:06 +020064 return &LIST_ELEM(si, struct stream *, si[1])->res;
Willy Tarreau0b2fb7f2014-11-28 11:50:38 +010065 else
Willy Tarreau87b09662015-04-03 00:22:06 +020066 return &LIST_ELEM(si, struct stream *, si[0])->req;
Willy Tarreau2bb4a962014-11-28 11:11:05 +010067}
68
69/* returns the channel which feeds data to this stream interface (output channel) */
70static inline struct channel *si_oc(struct stream_interface *si)
71{
Willy Tarreau0b2fb7f2014-11-28 11:50:38 +010072 if (si->flags & SI_FL_ISBACK)
Willy Tarreau87b09662015-04-03 00:22:06 +020073 return &LIST_ELEM(si, struct stream *, si[1])->req;
Willy Tarreau0b2fb7f2014-11-28 11:50:38 +010074 else
Willy Tarreau87b09662015-04-03 00:22:06 +020075 return &LIST_ELEM(si, struct stream *, si[0])->res;
Willy Tarreau2bb4a962014-11-28 11:11:05 +010076}
77
Willy Tarreau4e4292b2014-11-28 12:18:45 +010078/* returns the buffer which receives data from this stream interface (input channel's buffer) */
79static inline struct buffer *si_ib(struct stream_interface *si)
80{
Willy Tarreauc9fa0482018-07-10 17:43:27 +020081 return &si_ic(si)->buf;
Willy Tarreau4e4292b2014-11-28 12:18:45 +010082}
83
84/* returns the buffer which feeds data to this stream interface (output channel's buffer) */
85static inline struct buffer *si_ob(struct stream_interface *si)
86{
Willy Tarreauc9fa0482018-07-10 17:43:27 +020087 return &si_oc(si)->buf;
Willy Tarreau4e4292b2014-11-28 12:18:45 +010088}
89
Willy Tarreau87b09662015-04-03 00:22:06 +020090/* returns the stream associated to a stream interface */
91static inline struct stream *si_strm(struct stream_interface *si)
Willy Tarreauaefd7902014-11-28 12:03:32 +010092{
93 if (si->flags & SI_FL_ISBACK)
Willy Tarreau87b09662015-04-03 00:22:06 +020094 return LIST_ELEM(si, struct stream *, si[1]);
Willy Tarreauaefd7902014-11-28 12:03:32 +010095 else
Willy Tarreau87b09662015-04-03 00:22:06 +020096 return LIST_ELEM(si, struct stream *, si[0]);
Willy Tarreauaefd7902014-11-28 12:03:32 +010097}
98
Willy Tarreau07373b82014-11-28 12:08:47 +010099/* returns the task associated to this stream interface */
100static inline struct task *si_task(struct stream_interface *si)
101{
102 if (si->flags & SI_FL_ISBACK)
Willy Tarreau87b09662015-04-03 00:22:06 +0200103 return LIST_ELEM(si, struct stream *, si[1])->task;
Willy Tarreau07373b82014-11-28 12:08:47 +0100104 else
Willy Tarreau87b09662015-04-03 00:22:06 +0200105 return LIST_ELEM(si, struct stream *, si[0])->task;
Willy Tarreau07373b82014-11-28 12:08:47 +0100106}
107
Willy Tarreau50fe03b2014-11-28 13:59:31 +0100108/* returns the stream interface on the other side. Used during forwarding. */
109static inline struct stream_interface *si_opposite(struct stream_interface *si)
110{
111 if (si->flags & SI_FL_ISBACK)
Willy Tarreau87b09662015-04-03 00:22:06 +0200112 return &LIST_ELEM(si, struct stream *, si[1])->si[0];
Willy Tarreau50fe03b2014-11-28 13:59:31 +0100113 else
Willy Tarreau87b09662015-04-03 00:22:06 +0200114 return &LIST_ELEM(si, struct stream *, si[0])->si[1];
Willy Tarreau50fe03b2014-11-28 13:59:31 +0100115}
116
Willy Tarreau3ed35ef2013-10-24 11:51:38 +0200117/* initializes a stream interface in the SI_ST_INI state. It's detached from
Willy Tarreau819d3322014-11-28 12:12:34 +0100118 * any endpoint and only keeps its side which is expected to have already been
119 * set.
Willy Tarreau3ed35ef2013-10-24 11:51:38 +0200120 */
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200121static inline int si_reset(struct stream_interface *si)
Willy Tarreau3ed35ef2013-10-24 11:51:38 +0200122{
Willy Tarreau3ed35ef2013-10-24 11:51:38 +0200123 si->err_type = SI_ET_NONE;
124 si->conn_retries = 0; /* used for logging too */
Willy Tarreau3ed35ef2013-10-24 11:51:38 +0200125 si->exp = TICK_ETERNITY;
Willy Tarreaua5f5d8d2014-11-28 11:26:07 +0100126 si->flags &= SI_FL_ISBACK;
Willy Tarreau3ed35ef2013-10-24 11:51:38 +0200127 si->end = NULL;
128 si->state = si->prev_state = SI_ST_INI;
Willy Tarreau7365dad2015-04-20 01:03:17 +0200129 si->ops = &si_embedded_ops;
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200130 si->wait_event.task = tasklet_new();
131 if (!si->wait_event.task)
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200132 return -1;
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200133 si->wait_event.task->process = si_cs_io_cb;
134 si->wait_event.task->context = si;
135 si->wait_event.wait_reason = 0;
Olivier Houchard8f0b4c62018-08-02 18:21:38 +0200136 return 0;
Willy Tarreau3ed35ef2013-10-24 11:51:38 +0200137}
138
139/* sets the current and previous state of a stream interface to <state>. This
140 * is mainly used to create one in the established state on incoming
141 * conncetions.
142 */
143static inline void si_set_state(struct stream_interface *si, int state)
144{
145 si->state = si->prev_state = state;
146}
147
Willy Tarreau41b09f42015-08-04 20:44:05 +0200148/* only detaches the endpoint from the SI, which means that it's set to
149 * NULL and that ->ops is mapped to si_embedded_ops. The previous endpoint
150 * is returned.
151 */
152static inline enum obj_type *si_detach_endpoint(struct stream_interface *si)
153{
154 enum obj_type *prev = si->end;
155
156 si->end = NULL;
157 si->ops = &si_embedded_ops;
158 return prev;
159}
160
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100161/* Release the endpoint if it's a connection or an applet, then nullify it.
162 * Note: released connections are closed then freed.
163 */
Willy Tarreau32e3c6a2013-10-11 19:34:20 +0200164static inline void si_release_endpoint(struct stream_interface *si)
Willy Tarreau372d6702013-09-29 17:19:56 +0200165{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200166 struct conn_stream *cs;
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100167 struct appctx *appctx;
Willy Tarreau32e3c6a2013-10-11 19:34:20 +0200168
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100169 if (!si->end)
170 return;
171
Olivier Houchard4fdec7a2018-10-11 17:09:14 +0200172 if ((cs = objt_cs(si->end))) {
173 if (si->wait_event.wait_reason != 0)
174 cs->conn->mux->unsubscribe(cs, si->wait_event.wait_reason,
175 &si->wait_event);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200176 cs_destroy(cs);
Olivier Houchard4fdec7a2018-10-11 17:09:14 +0200177 }
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100178 else if ((appctx = objt_appctx(si->end))) {
Willy Tarreau958f0742015-09-25 20:24:26 +0200179 if (appctx->applet->release && si->state < SI_ST_DIS)
Willy Tarreau00a37f02015-04-13 12:05:19 +0200180 appctx->applet->release(appctx);
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100181 appctx_free(appctx); /* we share the connection pool */
182 }
Willy Tarreau41b09f42015-08-04 20:44:05 +0200183 si_detach_endpoint(si);
Willy Tarreau372d6702013-09-29 17:19:56 +0200184}
185
Willy Tarreau4320eaa2015-08-05 11:08:30 +0200186/* Turn an existing connection endpoint of stream interface <si> to idle mode,
187 * which means that the connection will be polled for incoming events and might
188 * be killed by the underlying I/O handler. If <pool> is not null, the
189 * connection will also be added at the head of this list. This connection
190 * remains assigned to the stream interface it is currently attached to.
Willy Tarreau27375622013-12-17 00:00:28 +0100191 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200192static inline void si_idle_cs(struct stream_interface *si, struct list *pool)
Willy Tarreau27375622013-12-17 00:00:28 +0100193{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200194 struct conn_stream *cs = __objt_cs(si->end);
195 struct connection *conn = cs->conn;
Willy Tarreau27375622013-12-17 00:00:28 +0100196
Olivier Houchard1fddc9b2018-10-21 00:32:01 +0200197 conn_force_unsubscribe(conn);
Willy Tarreau323a2d92015-08-04 19:00:17 +0200198 if (pool)
199 LIST_ADD(pool, &conn->list);
200
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200201 cs_attach(cs, si, &si_idle_conn_cb);
202 cs_want_recv(cs);
Willy Tarreau27375622013-12-17 00:00:28 +0100203}
204
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200205/* Attach conn_stream <cs> to the stream interface <si>. The stream interface
Willy Tarreau2a6e8802013-10-24 15:50:53 +0200206 * is configured to work with a connection and the connection it configured
207 * with a stream interface data layer.
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200208 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200209static inline void si_attach_cs(struct stream_interface *si, struct conn_stream *cs)
Willy Tarreaubd99aab2012-10-02 20:57:19 +0200210{
211 si->ops = &si_conn_ops;
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200212 si->end = &cs->obj_type;
213 cs_attach(cs, si, &si_conn_cb);
Willy Tarreaubd99aab2012-10-02 20:57:19 +0200214}
215
Willy Tarreaud02cdd22013-12-15 10:23:20 +0100216/* Returns true if a connection is attached to the stream interface <si> and
217 * if this connection is ready.
218 */
219static inline int si_conn_ready(struct stream_interface *si)
220{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200221 struct connection *conn = cs_conn(objt_cs(si->end));
Willy Tarreaud02cdd22013-12-15 10:23:20 +0100222
223 return conn && conn_ctrl_ready(conn) && conn_xprt_ready(conn);
224}
225
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100226/* Attach appctx <appctx> to the stream interface <si>. The stream interface
Willy Tarreaua7513f52015-04-05 00:15:26 +0200227 * is configured to work with an applet context.
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100228 */
229static inline void si_attach_appctx(struct stream_interface *si, struct appctx *appctx)
Willy Tarreauc5788912012-08-24 18:12:41 +0200230{
Willy Tarreaud45b9f82015-04-13 16:30:14 +0200231 si->ops = &si_applet_ops;
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100232 si->end = &appctx->obj_type;
Willy Tarreau19c81612015-04-13 11:48:16 +0200233 appctx->owner = si;
Willy Tarreauc5788912012-08-24 18:12:41 +0200234}
235
Willy Tarreau4ae49232018-09-20 11:08:47 +0200236/* returns a pointer to the appctx being run in the SI, which must be valid */
Willy Tarreau7b4b4992013-12-01 09:15:12 +0100237static inline struct appctx *si_appctx(struct stream_interface *si)
238{
Willy Tarreau4ae49232018-09-20 11:08:47 +0200239 return __objt_appctx(si->end);
Willy Tarreau7b4b4992013-12-01 09:15:12 +0100240}
241
Willy Tarreau4a59f2f2013-10-24 20:10:45 +0200242/* call the applet's release function if any. Needs to be called upon close() */
243static inline void si_applet_release(struct stream_interface *si)
244{
Willy Tarreau00a37f02015-04-13 12:05:19 +0200245 struct appctx *appctx;
Willy Tarreau4a59f2f2013-10-24 20:10:45 +0200246
Willy Tarreau4ae49232018-09-20 11:08:47 +0200247 appctx = objt_appctx(si->end);
Willy Tarreau958f0742015-09-25 20:24:26 +0200248 if (appctx && appctx->applet->release && si->state < SI_ST_DIS)
Willy Tarreau00a37f02015-04-13 12:05:19 +0200249 appctx->applet->release(appctx);
Willy Tarreau4a59f2f2013-10-24 20:10:45 +0200250}
251
Willy Tarreaueb406dc2015-04-21 18:44:02 +0200252/* let an applet indicate that it wants to put some data into the input buffer */
253static inline void si_applet_want_put(struct stream_interface *si)
254{
255 si->flags |= SI_FL_WANT_PUT;
256}
257
258/* let an applet indicate that it wanted to put some data into the input buffer
259 * but it couldn't.
260 */
261static inline void si_applet_cant_put(struct stream_interface *si)
262{
263 si->flags |= SI_FL_WANT_PUT | SI_FL_WAIT_ROOM;
264}
265
266/* let an applet indicate that it doesn't want to put data into the input buffer */
267static inline void si_applet_stop_put(struct stream_interface *si)
268{
269 si->flags &= ~SI_FL_WANT_PUT;
270}
271
272/* let an applet indicate that it wants to get some data from the output buffer */
273static inline void si_applet_want_get(struct stream_interface *si)
274{
275 si->flags |= SI_FL_WANT_GET;
276}
277
278/* let an applet indicate that it wanted to get some data from the output buffer
279 * but it couldn't.
280 */
281static inline void si_applet_cant_get(struct stream_interface *si)
282{
283 si->flags |= SI_FL_WANT_GET | SI_FL_WAIT_DATA;
284}
285
286/* let an applet indicate that it doesn't want to get data from the input buffer */
287static inline void si_applet_stop_get(struct stream_interface *si)
288{
289 si->flags &= ~SI_FL_WANT_GET;
290}
291
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200292/* Try to allocate a new conn_stream and assign it to the interface. If
Willy Tarreau973a5422015-08-05 21:47:23 +0200293 * an endpoint was previously allocated, it is released first. The newly
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200294 * allocated conn_stream is initialized, assigned to the stream interface,
Willy Tarreau973a5422015-08-05 21:47:23 +0200295 * and returned.
Willy Tarreau9471b8c2013-12-15 13:31:35 +0100296 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200297static inline struct conn_stream *si_alloc_cs(struct stream_interface *si, struct connection *conn)
Willy Tarreau32e3c6a2013-10-11 19:34:20 +0200298{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200299 struct conn_stream *cs;
Willy Tarreau32e3c6a2013-10-11 19:34:20 +0200300
Willy Tarreau973a5422015-08-05 21:47:23 +0200301 si_release_endpoint(si);
Willy Tarreau32e3c6a2013-10-11 19:34:20 +0200302
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200303 cs = cs_new(conn);
304 if (cs)
305 si_attach_cs(si, cs);
Willy Tarreau32e3c6a2013-10-11 19:34:20 +0200306
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200307 return cs;
Willy Tarreau32e3c6a2013-10-11 19:34:20 +0200308}
309
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100310/* Release the interface's existing endpoint (connection or appctx) and
311 * allocate then initialize a new appctx which is assigned to the interface
Willy Tarreaua7513f52015-04-05 00:15:26 +0200312 * and returned. NULL may be returned upon memory shortage. Applet <applet>
313 * is assigned to the appctx, but it may be NULL.
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100314 */
Willy Tarreau30576452015-04-13 13:50:30 +0200315static inline struct appctx *si_alloc_appctx(struct stream_interface *si, struct applet *applet)
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100316{
317 struct appctx *appctx;
318
319 si_release_endpoint(si);
Emeric Brun1138fd02017-06-19 12:38:55 +0200320 appctx = appctx_new(applet, tid_bit);
Willy Tarreau10d81b82018-05-31 14:44:25 +0200321 if (appctx) {
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100322 si_attach_appctx(si, appctx);
Willy Tarreau10d81b82018-05-31 14:44:25 +0200323 appctx->t->nice = si_strm(si)->task->nice;
324 }
Willy Tarreau0a23bcb2013-12-01 11:31:38 +0100325
326 return appctx;
327}
328
Willy Tarreau73b013b2012-05-21 16:31:45 +0200329/* Sends a shutr to the connection using the data layer */
330static inline void si_shutr(struct stream_interface *si)
331{
Willy Tarreau6fe15412013-09-29 15:16:03 +0200332 si->ops->shutr(si);
Willy Tarreau73b013b2012-05-21 16:31:45 +0200333}
334
335/* Sends a shutw to the connection using the data layer */
336static inline void si_shutw(struct stream_interface *si)
337{
Willy Tarreau6fe15412013-09-29 15:16:03 +0200338 si->ops->shutw(si);
Willy Tarreau73b013b2012-05-21 16:31:45 +0200339}
340
Willy Tarreau5d5b2fe2015-09-25 10:59:38 +0200341/* Updates the stream interface and timers, then updates the data layer below */
Willy Tarreau73b013b2012-05-21 16:31:45 +0200342static inline void si_update(struct stream_interface *si)
343{
Willy Tarreau5d5b2fe2015-09-25 10:59:38 +0200344 stream_int_update(si);
Willy Tarreau33552032015-09-24 18:05:45 +0200345 if (si->ops->update)
346 si->ops->update(si);
Willy Tarreau73b013b2012-05-21 16:31:45 +0200347}
348
349/* Calls chk_rcv on the connection using the data layer */
350static inline void si_chk_rcv(struct stream_interface *si)
351{
Willy Tarreauc5788912012-08-24 18:12:41 +0200352 si->ops->chk_rcv(si);
Willy Tarreau73b013b2012-05-21 16:31:45 +0200353}
354
355/* Calls chk_snd on the connection using the data layer */
356static inline void si_chk_snd(struct stream_interface *si)
357{
Willy Tarreauc5788912012-08-24 18:12:41 +0200358 si->ops->chk_snd(si);
Willy Tarreau73b013b2012-05-21 16:31:45 +0200359}
360
361/* Calls chk_snd on the connection using the ctrl layer */
362static inline int si_connect(struct stream_interface *si)
363{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200364 struct conn_stream *cs = objt_cs(si->end);
365 struct connection *conn = cs_conn(cs);
Willy Tarreaue7dff022015-04-03 01:14:29 +0200366 int ret = SF_ERR_NONE;
Willy Tarreau14f8e862012-08-30 22:23:13 +0200367
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200368 if (unlikely(!conn || !conn->ctrl || !conn->ctrl->connect))
Willy Tarreaue7dff022015-04-03 01:14:29 +0200369 return SF_ERR_INTERNAL;
Willy Tarreau14f8e862012-08-30 22:23:13 +0200370
Willy Tarreaub490b4e2013-12-15 16:20:50 +0100371 if (!conn_ctrl_ready(conn) || !conn_xprt_ready(conn)) {
Willy Tarreau2bb4a962014-11-28 11:11:05 +0100372 ret = conn->ctrl->connect(conn, !channel_is_empty(si_oc(si)), 0);
Willy Tarreaue7dff022015-04-03 01:14:29 +0200373 if (ret != SF_ERR_NONE)
Willy Tarreaub490b4e2013-12-15 16:20:50 +0100374 return ret;
Willy Tarreau9e5a3aa2013-12-31 23:32:12 +0100375
Willy Tarreau9e5a3aa2013-12-31 23:32:12 +0100376 /* we're in the process of establishing a connection */
377 si->state = SI_ST_CON;
Willy Tarreaub490b4e2013-12-15 16:20:50 +0100378 }
Christopher Fauletc34d19f2015-12-23 09:33:35 +0100379 else {
380 /* reuse the existing connection */
381 if (!channel_is_empty(si_oc(si))) {
382 /* we'll have to send a request there. */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200383 cs_want_send(cs);
Christopher Fauletc34d19f2015-12-23 09:33:35 +0100384 }
Willy Tarreau9e5a3aa2013-12-31 23:32:12 +0100385
386 /* the connection is established */
387 si->state = SI_ST_EST;
Willy Tarreaub490b4e2013-12-15 16:20:50 +0100388 }
Willy Tarreau14f8e862012-08-30 22:23:13 +0200389
390 /* needs src ip/port for logging */
391 if (si->flags & SI_FL_SRC_ADDR)
Willy Tarreaub363a1f2013-10-01 10:45:07 +0200392 conn_get_from_addr(conn);
Willy Tarreau14f8e862012-08-30 22:23:13 +0200393
Willy Tarreau14f8e862012-08-30 22:23:13 +0200394 return ret;
Willy Tarreau73b013b2012-05-21 16:31:45 +0200395}
Willy Tarreau59b94792012-05-11 16:16:40 +0200396
Willy Tarreau55e4ecd2012-12-08 17:48:47 +0100397/* for debugging, reports the stream interface state name */
398static inline const char *si_state_str(int state)
399{
400 switch (state) {
401 case SI_ST_INI: return "INI";
402 case SI_ST_REQ: return "REQ";
403 case SI_ST_QUE: return "QUE";
404 case SI_ST_TAR: return "TAR";
405 case SI_ST_ASS: return "ASS";
406 case SI_ST_CON: return "CON";
407 case SI_ST_CER: return "CER";
408 case SI_ST_EST: return "EST";
409 case SI_ST_DIS: return "DIS";
410 case SI_ST_CLO: return "CLO";
411 default: return "???";
412 }
413}
414
Willy Tarreaucff64112008-11-03 06:26:53 +0100415#endif /* _PROTO_STREAM_INTERFACE_H */
416
417/*
418 * Local variables:
419 * c-indent-level: 8
420 * c-basic-offset: 8
421 * End:
422 */