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Willy Tarreau59f98392012-07-06 14:13:49 +02001/*
2 * include/proto/connection.h
3 * This file contains connection function prototypes
4 *
5 * Copyright (C) 2000-2012 Willy Tarreau - w@1wt.eu
6 *
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 */
21
22#ifndef _PROTO_CONNECTION_H
23#define _PROTO_CONNECTION_H
24
25#include <common/config.h>
Willy Tarreau2386be62017-09-21 19:40:52 +020026#include <common/ist.h>
Willy Tarreauf2943dc2012-10-26 20:10:28 +020027#include <common/memory.h>
Willy Tarreau59f98392012-07-06 14:13:49 +020028#include <types/connection.h>
Willy Tarreaud1d54542012-09-12 22:58:11 +020029#include <types/listener.h>
Willy Tarreau2b199c92012-11-23 17:32:21 +010030#include <proto/fd.h>
Willy Tarreau3fdb3662012-11-12 00:42:33 +010031#include <proto/obj_type.h>
Olivier Houchard351411f2018-12-27 17:20:54 +010032#include <proto/session.h>
Olivier Houchard6ff20392018-07-17 18:46:31 +020033#include <proto/task.h>
Willy Tarreau59f98392012-07-06 14:13:49 +020034
Willy Tarreaubafbe012017-11-24 17:34:44 +010035extern struct pool_head *pool_head_connection;
36extern struct pool_head *pool_head_connstream;
Willy Tarreau13e14102016-12-22 20:25:26 +010037extern struct xprt_ops *registered_xprt[XPRT_ENTRIES];
Christopher Faulet32f61c02018-04-10 14:33:41 +020038extern struct mux_proto_list mux_proto_list;
Willy Tarreauf2943dc2012-10-26 20:10:28 +020039
Willy Tarreau59f98392012-07-06 14:13:49 +020040/* I/O callback for fd-based connections. It calls the read/write handlers
Willy Tarreau7a798e52016-04-14 11:13:20 +020041 * provided by the connection's sock_ops.
Willy Tarreau59f98392012-07-06 14:13:49 +020042 */
Willy Tarreau7a798e52016-04-14 11:13:20 +020043void conn_fd_handler(int fd);
Willy Tarreau59f98392012-07-06 14:13:49 +020044
Willy Tarreau22cda212012-08-31 17:43:29 +020045/* receive a PROXY protocol header over a connection */
46int conn_recv_proxy(struct connection *conn, int flag);
David Safb76832014-05-08 23:42:08 -040047int make_proxy_line(char *buf, int buf_len, struct server *srv, struct connection *remote);
48int make_proxy_line_v1(char *buf, int buf_len, struct sockaddr_storage *src, struct sockaddr_storage *dst);
49int make_proxy_line_v2(char *buf, int buf_len, struct server *srv, struct connection *remote);
Willy Tarreau22cda212012-08-31 17:43:29 +020050
Olivier Houcharde179d0e2019-03-21 18:27:17 +010051int conn_subscribe(struct connection *conn, void *xprt_ctx, int event_type, void *param);
52int conn_unsubscribe(struct connection *conn, void *xprt_ctx, int event_type, void *param);
Olivier Houchard83a0cd82018-09-28 17:57:58 +020053
Bertrand Jacquin93b227d2016-06-04 15:11:10 +010054/* receive a NetScaler Client IP insertion header over a connection */
55int conn_recv_netscaler_cip(struct connection *conn, int flag);
56
Willy Tarreauff3e6482015-03-12 23:56:52 +010057/* raw send() directly on the socket */
58int conn_sock_send(struct connection *conn, const void *buf, int len, int flags);
59
Willy Tarreaud85c4852015-03-13 00:40:28 +010060/* drains any pending bytes from the socket */
61int conn_sock_drain(struct connection *conn);
62
Willy Tarreaud02cdd22013-12-15 10:23:20 +010063/* returns true is the transport layer is ready */
Willy Tarreauaad69382014-01-23 14:21:42 +010064static inline int conn_xprt_ready(const struct connection *conn)
Willy Tarreaud02cdd22013-12-15 10:23:20 +010065{
Willy Tarreauaad69382014-01-23 14:21:42 +010066 return (conn->flags & CO_FL_XPRT_READY);
Willy Tarreaud02cdd22013-12-15 10:23:20 +010067}
68
69/* returns true is the control layer is ready */
Willy Tarreau3c728722014-01-23 13:50:42 +010070static inline int conn_ctrl_ready(const struct connection *conn)
Willy Tarreaud02cdd22013-12-15 10:23:20 +010071{
72 return (conn->flags & CO_FL_CTRL_READY);
73}
74
Willy Tarreauf79c8172013-10-21 16:30:56 +020075/* Calls the init() function of the transport layer if any and if not done yet,
76 * and sets the CO_FL_XPRT_READY flag to indicate it was properly initialized.
Willy Tarreauf7bc57c2012-10-03 00:19:48 +020077 * Returns <0 in case of error.
Willy Tarreau15678ef2012-08-31 13:54:11 +020078 */
Willy Tarreauf7bc57c2012-10-03 00:19:48 +020079static inline int conn_xprt_init(struct connection *conn)
Willy Tarreau15678ef2012-08-31 13:54:11 +020080{
Willy Tarreauf79c8172013-10-21 16:30:56 +020081 int ret = 0;
82
Willy Tarreauaad69382014-01-23 14:21:42 +010083 if (!conn_xprt_ready(conn) && conn->xprt && conn->xprt->init)
Olivier Houcharde179d0e2019-03-21 18:27:17 +010084 ret = conn->xprt->init(conn, &conn->xprt_ctx);
Willy Tarreauf79c8172013-10-21 16:30:56 +020085
86 if (ret >= 0)
87 conn->flags |= CO_FL_XPRT_READY;
88
89 return ret;
Willy Tarreau15678ef2012-08-31 13:54:11 +020090}
91
Willy Tarreauf79c8172013-10-21 16:30:56 +020092/* Calls the close() function of the transport layer if any and if not done
93 * yet, and clears the CO_FL_XPRT_READY flag. However this is not done if the
94 * CO_FL_XPRT_TRACKED flag is set, which allows logs to take data from the
95 * transport layer very late if needed.
Willy Tarreau6c03a642012-10-12 17:00:05 +020096 */
Willy Tarreauf7bc57c2012-10-03 00:19:48 +020097static inline void conn_xprt_close(struct connection *conn)
Willy Tarreau8b117082012-08-06 15:06:49 +020098{
Willy Tarreauf79c8172013-10-21 16:30:56 +020099 if ((conn->flags & (CO_FL_XPRT_READY|CO_FL_XPRT_TRACKED)) == CO_FL_XPRT_READY) {
Willy Tarreauaad69382014-01-23 14:21:42 +0100100 if (conn->xprt->close)
Olivier Houcharde179d0e2019-03-21 18:27:17 +0100101 conn->xprt->close(conn, conn->xprt_ctx);
Willy Tarreauf79c8172013-10-21 16:30:56 +0200102 conn->flags &= ~CO_FL_XPRT_READY;
103 }
104}
105
106/* Initializes the connection's control layer which essentially consists in
107 * registering the file descriptor for polling and setting the CO_FL_CTRL_READY
Willy Tarreau3c728722014-01-23 13:50:42 +0100108 * flag. The caller is responsible for ensuring that the control layer is
109 * already assigned to the connection prior to the call.
Willy Tarreauf79c8172013-10-21 16:30:56 +0200110 */
111static inline void conn_ctrl_init(struct connection *conn)
112{
Willy Tarreau3c728722014-01-23 13:50:42 +0100113 if (!conn_ctrl_ready(conn)) {
Willy Tarreau585744b2017-08-24 14:31:19 +0200114 int fd = conn->handle.fd;
Willy Tarreauf79c8172013-10-21 16:30:56 +0200115
Willy Tarreaua9786b62018-01-25 07:22:13 +0100116 fd_insert(fd, conn, conn_fd_handler, tid_bit);
Willy Tarreauf817e9f2014-01-10 16:58:45 +0100117 /* mark the fd as ready so as not to needlessly poll at the beginning */
118 fd_may_recv(fd);
119 fd_may_send(fd);
Willy Tarreauf79c8172013-10-21 16:30:56 +0200120 conn->flags |= CO_FL_CTRL_READY;
Willy Tarreau6c03a642012-10-12 17:00:05 +0200121 }
Willy Tarreau8b117082012-08-06 15:06:49 +0200122}
123
Willy Tarreauf79c8172013-10-21 16:30:56 +0200124/* Deletes the FD if the transport layer is already gone. Once done,
125 * it then removes the CO_FL_CTRL_READY flag.
126 */
127static inline void conn_ctrl_close(struct connection *conn)
128{
129 if ((conn->flags & (CO_FL_XPRT_READY|CO_FL_CTRL_READY)) == CO_FL_CTRL_READY) {
Willy Tarreau585744b2017-08-24 14:31:19 +0200130 fd_delete(conn->handle.fd);
Willy Tarreau6a0a80a2017-10-05 17:43:39 +0200131 conn->handle.fd = DEAD_FD_MAGIC;
Willy Tarreauf79c8172013-10-21 16:30:56 +0200132 conn->flags &= ~CO_FL_CTRL_READY;
133 }
134}
135
Willy Tarreau2b199c92012-11-23 17:32:21 +0100136/* If the connection still has a transport layer, then call its close() function
137 * if any, and delete the file descriptor if a control layer is set. This is
138 * used to close everything at once and atomically. However this is not done if
139 * the CO_FL_XPRT_TRACKED flag is set, which allows logs to take data from the
140 * transport layer very late if needed.
141 */
142static inline void conn_full_close(struct connection *conn)
143{
Willy Tarreauf79c8172013-10-21 16:30:56 +0200144 conn_xprt_close(conn);
145 conn_ctrl_close(conn);
146}
147
Willy Tarreaudc42acd2017-10-05 18:09:20 +0200148/* stop tracking a connection, allowing conn_full_close() to always
149 * succeed.
150 */
151static inline void conn_stop_tracking(struct connection *conn)
152{
153 conn->flags &= ~CO_FL_XPRT_TRACKED;
154}
155
Willy Tarreaue9dfa792012-09-01 17:26:16 +0200156/* Update polling on connection <c>'s file descriptor depending on its current
157 * state as reported in the connection's CO_FL_CURR_* flags, reports of EAGAIN
158 * in CO_FL_WAIT_*, and the sock layer expectations indicated by CO_FL_SOCK_*.
159 * The connection flags are updated with the new flags at the end of the
Willy Tarreau0ffde2c2012-10-04 22:21:15 +0200160 * operation. Polling is totally disabled if an error was reported.
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200161 */
Willy Tarreaue9dfa792012-09-01 17:26:16 +0200162void conn_update_sock_polling(struct connection *c);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200163
Willy Tarreaue9dfa792012-09-01 17:26:16 +0200164/* Update polling on connection <c>'s file descriptor depending on its current
165 * state as reported in the connection's CO_FL_CURR_* flags, reports of EAGAIN
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200166 * in CO_FL_WAIT_*, and the upper layer expectations indicated by CO_FL_XPRT_*.
Willy Tarreaue9dfa792012-09-01 17:26:16 +0200167 * The connection flags are updated with the new flags at the end of the
Willy Tarreau0ffde2c2012-10-04 22:21:15 +0200168 * operation. Polling is totally disabled if an error was reported.
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200169 */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200170void conn_update_xprt_polling(struct connection *c);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200171
Willy Tarreau7d281492012-12-16 19:19:13 +0100172/* Refresh the connection's polling flags from its file descriptor status.
Willy Tarreau916e12d2017-10-25 09:22:43 +0200173 * This should be called at the beginning of a connection handler. It does
174 * nothing if CO_FL_WILL_UPDATE is present, indicating that an upper caller
175 * has already done it.
Willy Tarreau7d281492012-12-16 19:19:13 +0100176 */
177static inline void conn_refresh_polling_flags(struct connection *conn)
178{
Willy Tarreau916e12d2017-10-25 09:22:43 +0200179 if (conn_ctrl_ready(conn) && !(conn->flags & CO_FL_WILL_UPDATE)) {
Willy Tarreaubc97cc42017-10-25 10:28:45 +0200180 unsigned int flags = conn->flags;
Willy Tarreau7d281492012-12-16 19:19:13 +0100181
Willy Tarreaubc97cc42017-10-25 10:28:45 +0200182 flags &= ~(CO_FL_CURR_RD_ENA | CO_FL_CURR_WR_ENA | CO_FL_WAIT_ROOM);
Willy Tarreau585744b2017-08-24 14:31:19 +0200183 if (fd_recv_active(conn->handle.fd))
Willy Tarreau7d281492012-12-16 19:19:13 +0100184 flags |= CO_FL_CURR_RD_ENA;
Willy Tarreau585744b2017-08-24 14:31:19 +0200185 if (fd_send_active(conn->handle.fd))
Willy Tarreau7d281492012-12-16 19:19:13 +0100186 flags |= CO_FL_CURR_WR_ENA;
187 conn->flags = flags;
188 }
189}
190
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200191/* inspects c->flags and returns non-zero if XPRT ENA changes from the CURR ENA
Willy Tarreauc8dd77f2012-11-05 17:52:26 +0100192 * or if the WAIT flags are set with their respective ENA flags. Additionally,
Willy Tarreau0ffde2c2012-10-04 22:21:15 +0200193 * non-zero is also returned if an error was reported on the connection. This
194 * function is used quite often and is inlined. In order to proceed optimally
195 * with very little code and CPU cycles, the bits are arranged so that a change
Willy Tarreauc8dd77f2012-11-05 17:52:26 +0100196 * can be detected by a few left shifts, a xor, and a mask. These operations
197 * detect when W&D are both enabled for either direction, when C&D differ for
198 * either direction and when Error is set. The trick consists in first keeping
199 * only the bits we're interested in, since they don't collide when shifted,
200 * and to perform the AND at the end. In practice, the compiler is able to
201 * replace the last AND with a TEST in boolean conditions. This results in
202 * checks that are done in 4-6 cycles and less than 30 bytes.
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200203 */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200204static inline unsigned int conn_xprt_polling_changes(const struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200205{
Willy Tarreauc8dd77f2012-11-05 17:52:26 +0100206 unsigned int f = c->flags;
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200207 f &= CO_FL_XPRT_WR_ENA | CO_FL_XPRT_RD_ENA | CO_FL_CURR_WR_ENA |
Willy Tarreau310987a2014-01-22 19:46:33 +0100208 CO_FL_CURR_RD_ENA | CO_FL_ERROR;
Willy Tarreauc8dd77f2012-11-05 17:52:26 +0100209
Willy Tarreau310987a2014-01-22 19:46:33 +0100210 f = (f ^ (f << 1)) & (CO_FL_CURR_WR_ENA|CO_FL_CURR_RD_ENA); /* test C ^ D */
211 return f & (CO_FL_CURR_WR_ENA | CO_FL_CURR_RD_ENA | CO_FL_ERROR);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200212}
213
Willy Tarreaue9dfa792012-09-01 17:26:16 +0200214/* inspects c->flags and returns non-zero if SOCK ENA changes from the CURR ENA
Willy Tarreauc8dd77f2012-11-05 17:52:26 +0100215 * or if the WAIT flags are set with their respective ENA flags. Additionally,
Willy Tarreau0ffde2c2012-10-04 22:21:15 +0200216 * non-zero is also returned if an error was reported on the connection. This
217 * function is used quite often and is inlined. In order to proceed optimally
218 * with very little code and CPU cycles, the bits are arranged so that a change
Willy Tarreauc8dd77f2012-11-05 17:52:26 +0100219 * can be detected by a few left shifts, a xor, and a mask. These operations
220 * detect when W&S are both enabled for either direction, when C&S differ for
221 * either direction and when Error is set. The trick consists in first keeping
222 * only the bits we're interested in, since they don't collide when shifted,
223 * and to perform the AND at the end. In practice, the compiler is able to
224 * replace the last AND with a TEST in boolean conditions. This results in
225 * checks that are done in 4-6 cycles and less than 30 bytes.
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200226 */
227static inline unsigned int conn_sock_polling_changes(const struct connection *c)
228{
Willy Tarreauc8dd77f2012-11-05 17:52:26 +0100229 unsigned int f = c->flags;
230 f &= CO_FL_SOCK_WR_ENA | CO_FL_SOCK_RD_ENA | CO_FL_CURR_WR_ENA |
Willy Tarreau310987a2014-01-22 19:46:33 +0100231 CO_FL_CURR_RD_ENA | CO_FL_ERROR;
Willy Tarreauc8dd77f2012-11-05 17:52:26 +0100232
Willy Tarreau310987a2014-01-22 19:46:33 +0100233 f = (f ^ (f << 2)) & (CO_FL_CURR_WR_ENA|CO_FL_CURR_RD_ENA); /* test C ^ S */
234 return f & (CO_FL_CURR_WR_ENA | CO_FL_CURR_RD_ENA | CO_FL_ERROR);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200235}
236
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200237/* Automatically updates polling on connection <c> depending on the XPRT flags
Willy Tarreau916e12d2017-10-25 09:22:43 +0200238 * if no handshake is in progress. It does nothing if CO_FL_WILL_UPDATE is
239 * present, indicating that an upper caller is going to do it again later.
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200240 */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200241static inline void conn_cond_update_xprt_polling(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200242{
Willy Tarreau916e12d2017-10-25 09:22:43 +0200243 if (!(c->flags & CO_FL_WILL_UPDATE))
244 if (!(c->flags & CO_FL_POLL_SOCK) && conn_xprt_polling_changes(c))
245 conn_update_xprt_polling(c);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200246}
247
248/* Automatically updates polling on connection <c> depending on the SOCK flags
Willy Tarreau916e12d2017-10-25 09:22:43 +0200249 * if a handshake is in progress. It does nothing if CO_FL_WILL_UPDATE is
250 * present, indicating that an upper caller is going to do it again later.
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200251 */
252static inline void conn_cond_update_sock_polling(struct connection *c)
253{
Willy Tarreau916e12d2017-10-25 09:22:43 +0200254 if (!(c->flags & CO_FL_WILL_UPDATE))
255 if ((c->flags & CO_FL_POLL_SOCK) && conn_sock_polling_changes(c))
256 conn_update_sock_polling(c);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200257}
258
Willy Tarreau36fb02c2012-11-24 11:09:07 +0100259/* Stop all polling on the fd. This might be used when an error is encountered
Willy Tarreau916e12d2017-10-25 09:22:43 +0200260 * for example. It does not propage the change to the fd layer if
261 * CO_FL_WILL_UPDATE is present, indicating that an upper caller is going to do
262 * it later.
Willy Tarreau36fb02c2012-11-24 11:09:07 +0100263 */
264static inline void conn_stop_polling(struct connection *c)
265{
266 c->flags &= ~(CO_FL_CURR_RD_ENA | CO_FL_CURR_WR_ENA |
267 CO_FL_SOCK_RD_ENA | CO_FL_SOCK_WR_ENA |
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200268 CO_FL_XPRT_RD_ENA | CO_FL_XPRT_WR_ENA);
Willy Tarreau916e12d2017-10-25 09:22:43 +0200269 if (!(c->flags & CO_FL_WILL_UPDATE) && conn_ctrl_ready(c))
Willy Tarreau585744b2017-08-24 14:31:19 +0200270 fd_stop_both(c->handle.fd);
Willy Tarreau36fb02c2012-11-24 11:09:07 +0100271}
272
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200273/* Automatically update polling on connection <c> depending on the XPRT and
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200274 * SOCK flags, and on whether a handshake is in progress or not. This may be
275 * called at any moment when there is a doubt about the effectiveness of the
276 * polling state, for instance when entering or leaving the handshake state.
Willy Tarreau916e12d2017-10-25 09:22:43 +0200277 * It does nothing if CO_FL_WILL_UPDATE is present, indicating that an upper
278 * caller is going to do it again later.
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200279 */
280static inline void conn_cond_update_polling(struct connection *c)
281{
Willy Tarreau36fb02c2012-11-24 11:09:07 +0100282 if (unlikely(c->flags & CO_FL_ERROR))
283 conn_stop_polling(c);
Willy Tarreau916e12d2017-10-25 09:22:43 +0200284 else if (!(c->flags & CO_FL_WILL_UPDATE)) {
285 if (!(c->flags & CO_FL_POLL_SOCK) && conn_xprt_polling_changes(c))
286 conn_update_xprt_polling(c);
287 else if ((c->flags & CO_FL_POLL_SOCK) && conn_sock_polling_changes(c))
288 conn_update_sock_polling(c);
289 }
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200290}
291
292/***** Event manipulation primitives for use by DATA I/O callbacks *****/
293/* The __conn_* versions do not propagate to lower layers and are only meant
294 * to be used by handlers called by the connection handler. The other ones
295 * may be used anywhere.
296 */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200297static inline void __conn_xprt_want_recv(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200298{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200299 c->flags |= CO_FL_XPRT_RD_ENA;
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200300}
301
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200302static inline void __conn_xprt_stop_recv(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200303{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200304 c->flags &= ~CO_FL_XPRT_RD_ENA;
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200305}
306
Willy Tarreau796c5b72016-11-29 21:47:02 +0100307/* this one is used only to stop speculative recv(). It doesn't stop it if the
308 * fd is already polled in order to avoid expensive polling status changes.
309 * Since it might require the upper layer to re-enable reading, we'll return 1
310 * if we've really stopped something otherwise zero.
311 */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200312static inline int __conn_xprt_done_recv(struct connection *c)
Willy Tarreau796c5b72016-11-29 21:47:02 +0100313{
Willy Tarreau585744b2017-08-24 14:31:19 +0200314 if (!conn_ctrl_ready(c) || !fd_recv_polled(c->handle.fd)) {
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200315 c->flags &= ~CO_FL_XPRT_RD_ENA;
Willy Tarreau796c5b72016-11-29 21:47:02 +0100316 return 1;
317 }
318 return 0;
319}
320
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200321static inline void __conn_xprt_want_send(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200322{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200323 c->flags |= CO_FL_XPRT_WR_ENA;
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200324}
325
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200326static inline void __conn_xprt_stop_send(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200327{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200328 c->flags &= ~CO_FL_XPRT_WR_ENA;
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200329}
330
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200331static inline void __conn_xprt_stop_both(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200332{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200333 c->flags &= ~(CO_FL_XPRT_WR_ENA | CO_FL_XPRT_RD_ENA);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200334}
335
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200336static inline void conn_xprt_want_recv(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200337{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200338 __conn_xprt_want_recv(c);
339 conn_cond_update_xprt_polling(c);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200340}
341
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200342static inline void conn_xprt_stop_recv(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200343{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200344 __conn_xprt_stop_recv(c);
345 conn_cond_update_xprt_polling(c);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200346}
347
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200348static inline void conn_xprt_want_send(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200349{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200350 __conn_xprt_want_send(c);
351 conn_cond_update_xprt_polling(c);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200352}
353
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200354static inline void conn_xprt_stop_send(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200355{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200356 __conn_xprt_stop_send(c);
357 conn_cond_update_xprt_polling(c);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200358}
359
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200360static inline void conn_xprt_stop_both(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200361{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200362 __conn_xprt_stop_both(c);
363 conn_cond_update_xprt_polling(c);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200364}
365
366/***** Event manipulation primitives for use by handshake I/O callbacks *****/
367/* The __conn_* versions do not propagate to lower layers and are only meant
368 * to be used by handlers called by the connection handler. The other ones
369 * may be used anywhere.
370 */
371static inline void __conn_sock_want_recv(struct connection *c)
372{
373 c->flags |= CO_FL_SOCK_RD_ENA;
374}
375
376static inline void __conn_sock_stop_recv(struct connection *c)
377{
378 c->flags &= ~CO_FL_SOCK_RD_ENA;
379}
380
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200381static inline void __conn_sock_want_send(struct connection *c)
382{
383 c->flags |= CO_FL_SOCK_WR_ENA;
384}
385
386static inline void __conn_sock_stop_send(struct connection *c)
387{
388 c->flags &= ~CO_FL_SOCK_WR_ENA;
389}
390
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200391static inline void __conn_sock_stop_both(struct connection *c)
392{
393 c->flags &= ~(CO_FL_SOCK_WR_ENA | CO_FL_SOCK_RD_ENA);
394}
395
396static inline void conn_sock_want_recv(struct connection *c)
397{
398 __conn_sock_want_recv(c);
399 conn_cond_update_sock_polling(c);
400}
401
402static inline void conn_sock_stop_recv(struct connection *c)
403{
404 __conn_sock_stop_recv(c);
405 conn_cond_update_sock_polling(c);
406}
407
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200408static inline void conn_sock_want_send(struct connection *c)
409{
410 __conn_sock_want_send(c);
411 conn_cond_update_sock_polling(c);
412}
413
414static inline void conn_sock_stop_send(struct connection *c)
415{
416 __conn_sock_stop_send(c);
417 conn_cond_update_sock_polling(c);
418}
419
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200420static inline void conn_sock_stop_both(struct connection *c)
421{
422 __conn_sock_stop_both(c);
423 conn_cond_update_sock_polling(c);
424}
Willy Tarreau8b117082012-08-06 15:06:49 +0200425
Willy Tarreau7b271b22017-10-25 09:59:22 +0200426/* read shutdown, called from the rcv_buf/rcv_pipe handlers when
427 * detecting an end of connection.
428 */
Willy Tarreau3af56a92012-08-20 16:55:48 +0200429static inline void conn_sock_read0(struct connection *c)
430{
431 c->flags |= CO_FL_SOCK_RD_SH;
432 __conn_sock_stop_recv(c);
Willy Tarreauad38ace2013-12-15 14:19:38 +0100433 /* we don't risk keeping ports unusable if we found the
434 * zero from the other side.
435 */
Willy Tarreau3c728722014-01-23 13:50:42 +0100436 if (conn_ctrl_ready(c))
Willy Tarreau585744b2017-08-24 14:31:19 +0200437 fdtab[c->handle.fd].linger_risk = 0;
Willy Tarreau3af56a92012-08-20 16:55:48 +0200438}
439
Willy Tarreau7b271b22017-10-25 09:59:22 +0200440/* write shutdown, indication that the upper layer is not willing to send
Willy Tarreaua48c1412017-12-22 18:46:33 +0100441 * anything anymore and wants to close after pending data are sent. The
442 * <clean> argument will allow not to perform the socket layer shutdown if
443 * equal to 0.
Willy Tarreau7b271b22017-10-25 09:59:22 +0200444 */
Willy Tarreaua48c1412017-12-22 18:46:33 +0100445static inline void conn_sock_shutw(struct connection *c, int clean)
Willy Tarreau3af56a92012-08-20 16:55:48 +0200446{
447 c->flags |= CO_FL_SOCK_WR_SH;
Willy Tarreau7b271b22017-10-25 09:59:22 +0200448 conn_refresh_polling_flags(c);
Willy Tarreau3af56a92012-08-20 16:55:48 +0200449 __conn_sock_stop_send(c);
Willy Tarreau7b271b22017-10-25 09:59:22 +0200450 conn_cond_update_sock_polling(c);
451
Willy Tarreaua48c1412017-12-22 18:46:33 +0100452 /* don't perform a clean shutdown if we're going to reset or
453 * if the shutr was already received.
454 */
455 if (conn_ctrl_ready(c) && !(c->flags & CO_FL_SOCK_RD_SH) && clean)
Willy Tarreau585744b2017-08-24 14:31:19 +0200456 shutdown(c->handle.fd, SHUT_WR);
Willy Tarreau3af56a92012-08-20 16:55:48 +0200457}
458
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200459static inline void conn_xprt_shutw(struct connection *c)
Willy Tarreau3af56a92012-08-20 16:55:48 +0200460{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200461 __conn_xprt_stop_send(c);
Willy Tarreau729c69f2015-03-12 22:51:10 +0100462
463 /* clean data-layer shutdown */
464 if (c->xprt && c->xprt->shutw)
Olivier Houcharde179d0e2019-03-21 18:27:17 +0100465 c->xprt->shutw(c, c->xprt_ctx, 1);
Willy Tarreau729c69f2015-03-12 22:51:10 +0100466}
467
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200468static inline void conn_xprt_shutw_hard(struct connection *c)
Willy Tarreau729c69f2015-03-12 22:51:10 +0100469{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200470 __conn_xprt_stop_send(c);
Willy Tarreau729c69f2015-03-12 22:51:10 +0100471
472 /* unclean data-layer shutdown */
473 if (c->xprt && c->xprt->shutw)
Olivier Houcharde179d0e2019-03-21 18:27:17 +0100474 c->xprt->shutw(c, c->xprt_ctx, 0);
Willy Tarreau3af56a92012-08-20 16:55:48 +0200475}
476
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200477/* shut read */
478static inline void cs_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200479{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200480
481 /* clean data-layer shutdown */
482 if (cs->conn->mux && cs->conn->mux->shutr)
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200483 cs->conn->mux->shutr(cs, mode);
484 cs->flags |= (mode == CS_SHR_DRAIN) ? CS_FL_SHRD : CS_FL_SHRR;
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200485}
486
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200487/* shut write */
488static inline void cs_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200489{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200490
491 /* clean data-layer shutdown */
492 if (cs->conn->mux && cs->conn->mux->shutw)
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200493 cs->conn->mux->shutw(cs, mode);
494 cs->flags |= (mode == CS_SHW_NORMAL) ? CS_FL_SHWN : CS_FL_SHWS;
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200495}
496
Willy Tarreau6978db32017-10-05 18:19:43 +0200497/* completely close a conn_stream (but do not detach it) */
498static inline void cs_close(struct conn_stream *cs)
499{
500 cs_shutw(cs, CS_SHW_SILENT);
501 cs_shutr(cs, CS_SHR_RESET);
502 cs->flags = CS_FL_NONE;
503}
504
Willy Tarreaue9f43012018-12-19 17:59:30 +0100505/* sets CS_FL_ERROR or CS_FL_ERR_PENDING on the cs */
506static inline void cs_set_error(struct conn_stream *cs)
507{
508 if (cs->flags & CS_FL_EOS)
509 cs->flags |= CS_FL_ERROR;
510 else
511 cs->flags |= CS_FL_REOS | CS_FL_ERR_PENDING;
512}
513
Willy Tarreau3af56a92012-08-20 16:55:48 +0200514/* detect sock->data read0 transition */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200515static inline int conn_xprt_read0_pending(struct connection *c)
Willy Tarreau3af56a92012-08-20 16:55:48 +0200516{
Willy Tarreau54e917c2017-08-30 07:35:35 +0200517 return (c->flags & CO_FL_SOCK_RD_SH) != 0;
Willy Tarreau3af56a92012-08-20 16:55:48 +0200518}
519
Willy Tarreau910c6aa2013-10-24 15:08:37 +0200520/* prepares a connection to work with protocol <proto> and transport <xprt>.
Willy Tarreau53a47662017-08-28 10:53:00 +0200521 * The transport's is initialized as well, and the mux and its context are
Willy Tarreaube373152018-09-06 11:45:30 +0200522 * cleared. The target is not reinitialized and it is recommended that it is
523 * set prior to calling this function so that the function may make use of it
524 * in the future to refine the mux choice if needed.
Willy Tarreau910c6aa2013-10-24 15:08:37 +0200525 */
526static inline void conn_prepare(struct connection *conn, const struct protocol *proto, const struct xprt_ops *xprt)
527{
528 conn->ctrl = proto;
529 conn->xprt = xprt;
Willy Tarreau53a47662017-08-28 10:53:00 +0200530 conn->mux = NULL;
Willy Tarreau910c6aa2013-10-24 15:08:37 +0200531 conn->xprt_ctx = NULL;
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100532 conn->ctx = NULL;
Willy Tarreau910c6aa2013-10-24 15:08:37 +0200533}
534
Willy Tarreau63dd75d2017-10-08 15:16:00 +0200535/*
536 * Initializes all required fields for a new conn_strema.
537 */
538static inline void cs_init(struct conn_stream *cs, struct connection *conn)
539{
540 cs->obj_type = OBJ_TYPE_CS;
541 cs->flags = CS_FL_NONE;
542 cs->conn = conn;
543}
544
Willy Tarreaud0155772013-10-14 17:10:08 +0200545/* Initializes all required fields for a new connection. Note that it does the
546 * minimum acceptable initialization for a connection that already exists and
547 * is about to be reused. It also leaves the addresses untouched, which makes
548 * it usable across connection retries to reset a connection to a known state.
549 */
550static inline void conn_init(struct connection *conn)
551{
552 conn->obj_type = OBJ_TYPE_CONN;
553 conn->flags = CO_FL_NONE;
Willy Tarreau53a47662017-08-28 10:53:00 +0200554 conn->mux = NULL;
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100555 conn->ctx = NULL;
Willy Tarreaud0155772013-10-14 17:10:08 +0200556 conn->owner = NULL;
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200557 conn->send_proxy_ofs = 0;
Willy Tarreau585744b2017-08-24 14:31:19 +0200558 conn->handle.fd = DEAD_FD_MAGIC;
Willy Tarreaud0155772013-10-14 17:10:08 +0200559 conn->err_code = CO_ER_NONE;
560 conn->target = NULL;
Willy Tarreau8e3c6ce2017-08-28 15:46:01 +0200561 conn->xprt_done_cb = NULL;
Willy Tarreau436d3332017-10-08 11:16:46 +0200562 conn->destroy_cb = NULL;
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100563 conn->proxy_netns = NULL;
Willy Tarreaud75d40e2015-08-04 17:25:58 +0200564 LIST_INIT(&conn->list);
Olivier Houchard131fd892018-11-13 16:44:31 +0100565 LIST_INIT(&conn->session_list);
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200566 conn->send_wait = NULL;
567 conn->recv_wait = NULL;
Olivier Houchard006e3102018-12-10 18:30:32 +0100568 conn->idle_time = 0;
Willy Tarreaud0155772013-10-14 17:10:08 +0200569}
570
Willy Tarreau8e3c6ce2017-08-28 15:46:01 +0200571/* sets <owner> as the connection's owner */
Willy Tarreau436d3332017-10-08 11:16:46 +0200572static inline void conn_set_owner(struct connection *conn, void *owner, void (*cb)(struct connection *))
Willy Tarreau8e3c6ce2017-08-28 15:46:01 +0200573{
574 conn->owner = owner;
Willy Tarreau436d3332017-10-08 11:16:46 +0200575 conn->destroy_cb = cb;
Willy Tarreau8e3c6ce2017-08-28 15:46:01 +0200576}
577
578/* registers <cb> as a callback to notify for transport's readiness or failure */
579static inline void conn_set_xprt_done_cb(struct connection *conn, int (*cb)(struct connection *))
580{
581 conn->xprt_done_cb = cb;
582}
583
584/* unregisters the callback to notify for transport's readiness or failure */
585static inline void conn_clear_xprt_done_cb(struct connection *conn)
586{
587 conn->xprt_done_cb = NULL;
588}
589
Willy Tarreaub97f3b12013-10-20 22:56:45 +0200590/* Tries to allocate a new connection and initialized its main fields. The
591 * connection is returned on success, NULL on failure. The connection must
Willy Tarreaubafbe012017-11-24 17:34:44 +0100592 * be released using pool_free() or conn_free().
Willy Tarreaub97f3b12013-10-20 22:56:45 +0200593 */
594static inline struct connection *conn_new()
595{
596 struct connection *conn;
597
Willy Tarreaubafbe012017-11-24 17:34:44 +0100598 conn = pool_alloc(pool_head_connection);
Willy Tarreaub97f3b12013-10-20 22:56:45 +0200599 if (likely(conn != NULL))
600 conn_init(conn);
601 return conn;
602}
603
Willy Tarreau5e1cc5e2018-03-02 10:43:58 +0100604/* Releases a conn_stream previously allocated by cs_new(), as well as any
605 * buffer it would still hold.
606 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200607static inline void cs_free(struct conn_stream *cs)
608{
Willy Tarreau5e1cc5e2018-03-02 10:43:58 +0100609
Willy Tarreaubafbe012017-11-24 17:34:44 +0100610 pool_free(pool_head_connstream, cs);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200611}
612
613/* Tries to allocate a new conn_stream and initialize its main fields. If
614 * <conn> is NULL, then a new connection is allocated on the fly, initialized,
615 * and assigned to cs->conn ; this connection will then have to be released
Willy Tarreaubafbe012017-11-24 17:34:44 +0100616 * using pool_free() or conn_free(). The conn_stream is initialized and added
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200617 * to the mux's stream list on success, then returned. On failure, nothing is
618 * allocated and NULL is returned.
Willy Tarreau63dd75d2017-10-08 15:16:00 +0200619 */
620static inline struct conn_stream *cs_new(struct connection *conn)
621{
622 struct conn_stream *cs;
623
Willy Tarreaubafbe012017-11-24 17:34:44 +0100624 cs = pool_alloc(pool_head_connstream);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200625 if (!likely(cs))
626 return NULL;
Willy Tarreau63dd75d2017-10-08 15:16:00 +0200627
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200628 if (!conn) {
629 conn = conn_new();
630 if (!likely(conn)) {
631 cs_free(cs);
632 return NULL;
633 }
634 conn_init(conn);
635 }
636
637 cs_init(cs, conn);
638 return cs;
Willy Tarreau63dd75d2017-10-08 15:16:00 +0200639}
640
Willy Tarreaufafd3982018-11-18 21:29:20 +0100641/* Retrieves any valid conn_stream from this connection, preferably the first
642 * valid one. The purpose is to be able to figure one other end of a private
643 * connection for purposes like source binding or proxy protocol header
644 * emission. In such cases, any conn_stream is expected to be valid so the
645 * mux is encouraged to return the first one it finds. If the connection has
646 * no mux or the mux has no get_first_cs() method or the mux has no valid
647 * conn_stream, NULL is returned. The output pointer is purposely marked
648 * const to discourage the caller from modifying anything there.
649 */
650static inline const struct conn_stream *cs_get_first(const struct connection *conn)
651{
652 if (!conn || !conn->mux || !conn->mux->get_first_cs)
653 return NULL;
654 return conn->mux->get_first_cs(conn);
655}
656
Olivier Houchard1fddc9b2018-10-21 00:32:01 +0200657static inline void conn_force_unsubscribe(struct connection *conn)
Willy Tarreaub97f3b12013-10-20 22:56:45 +0200658{
Olivier Houchard1fddc9b2018-10-21 00:32:01 +0200659 if (conn->recv_wait) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100660 conn->recv_wait->events &= ~SUB_RETRY_RECV;
Olivier Houchard1fddc9b2018-10-21 00:32:01 +0200661 conn->recv_wait = NULL;
662 }
663 if (conn->send_wait) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100664 conn->send_wait->events &= ~SUB_RETRY_SEND;
Olivier Houchard1fddc9b2018-10-21 00:32:01 +0200665 conn->send_wait = NULL;
666 }
667
668}
669
670/* Releases a connection previously allocated by conn_new() */
671static inline void conn_free(struct connection *conn)
672{
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100673 /* Remove ourself from the session's connections list, if any. */
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +0100674 if (!LIST_ISEMPTY(&conn->session_list)) {
675 struct session *sess = conn->owner;
Olivier Houcharda2dbeb22018-12-28 18:50:57 +0100676 if (conn->flags & CO_FL_SESS_IDLE)
677 sess->idle_conns--;
Olivier Houchard351411f2018-12-27 17:20:54 +0100678 session_unown_conn(sess, conn);
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +0100679 }
Willy Tarreau94031d32018-12-19 14:36:29 +0100680
681 /* By convention we always place a NULL where the ctx points to if the
682 * mux is null. It may have been used to store the connection as a
683 * stream_interface's end point for example.
Olivier Houchard201b9f42018-11-21 00:16:29 +0100684 */
Willy Tarreau94031d32018-12-19 14:36:29 +0100685 if (conn->ctx != NULL && conn->mux == NULL)
686 *(void **)conn->ctx = NULL;
Olivier Houchard201b9f42018-11-21 00:16:29 +0100687
Olivier Houchard006e3102018-12-10 18:30:32 +0100688 /* The connection is currently in the server's idle list, so tell it
689 * there's one less connection available in that list.
690 */
691 if (conn->idle_time > 0) {
692 struct server *srv = __objt_server(conn->target);
Olivier Houchard237985b2019-03-13 18:52:21 +0100693 _HA_ATOMIC_SUB(&srv->curr_idle_conns, 1);
Olivier Houchardf1314812019-02-18 16:41:17 +0100694 srv->curr_idle_thr[tid]--;
Olivier Houchard006e3102018-12-10 18:30:32 +0100695 }
Olivier Houchard201b9f42018-11-21 00:16:29 +0100696
Olivier Houchard1fddc9b2018-10-21 00:32:01 +0200697 conn_force_unsubscribe(conn);
Olivier Houchard7f1bc312019-01-22 16:11:03 +0100698 LIST_DEL_LOCKED(&conn->list);
Willy Tarreaubafbe012017-11-24 17:34:44 +0100699 pool_free(pool_head_connection, conn);
Willy Tarreaub97f3b12013-10-20 22:56:45 +0200700}
701
Olivier Houchard7c6f8b12018-11-13 16:48:36 +0100702/* Release a conn_stream */
Willy Tarreau63dd75d2017-10-08 15:16:00 +0200703static inline void cs_destroy(struct conn_stream *cs)
704{
Olivier Houchard302f9ef2018-04-13 15:50:27 +0200705 if (cs->conn->mux)
706 cs->conn->mux->detach(cs);
707 else {
708 /* It's too early to have a mux, let's just destroy
709 * the connection
710 */
711 struct connection *conn = cs->conn;
712
713 conn_stop_tracking(conn);
714 conn_full_close(conn);
715 if (conn->destroy_cb)
716 conn->destroy_cb(conn);
717 conn_free(conn);
718 }
Willy Tarreau63dd75d2017-10-08 15:16:00 +0200719 cs_free(cs);
720}
721
Olivier Houcharde2b40b92017-09-13 18:30:23 +0200722/* Returns the conn from a cs. If cs is NULL, returns NULL */
723static inline struct connection *cs_conn(const struct conn_stream *cs)
724{
725 return cs ? cs->conn : NULL;
726}
Willy Tarreaub97f3b12013-10-20 22:56:45 +0200727
Willy Tarreau986a9d22012-08-30 21:11:38 +0200728/* Retrieves the connection's source address */
729static inline void conn_get_from_addr(struct connection *conn)
730{
731 if (conn->flags & CO_FL_ADDR_FROM_SET)
732 return;
733
Willy Tarreau3c728722014-01-23 13:50:42 +0100734 if (!conn_ctrl_ready(conn) || !conn->ctrl->get_src)
Willy Tarreau986a9d22012-08-30 21:11:38 +0200735 return;
736
Willy Tarreau585744b2017-08-24 14:31:19 +0200737 if (conn->ctrl->get_src(conn->handle.fd, (struct sockaddr *)&conn->addr.from,
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100738 sizeof(conn->addr.from),
739 obj_type(conn->target) != OBJ_TYPE_LISTENER) == -1)
Willy Tarreau986a9d22012-08-30 21:11:38 +0200740 return;
741 conn->flags |= CO_FL_ADDR_FROM_SET;
742}
743
744/* Retrieves the connection's original destination address */
745static inline void conn_get_to_addr(struct connection *conn)
746{
747 if (conn->flags & CO_FL_ADDR_TO_SET)
748 return;
749
Willy Tarreau3c728722014-01-23 13:50:42 +0100750 if (!conn_ctrl_ready(conn) || !conn->ctrl->get_dst)
Willy Tarreau986a9d22012-08-30 21:11:38 +0200751 return;
752
Willy Tarreau585744b2017-08-24 14:31:19 +0200753 if (conn->ctrl->get_dst(conn->handle.fd, (struct sockaddr *)&conn->addr.to,
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100754 sizeof(conn->addr.to),
755 obj_type(conn->target) != OBJ_TYPE_LISTENER) == -1)
Willy Tarreau986a9d22012-08-30 21:11:38 +0200756 return;
757 conn->flags |= CO_FL_ADDR_TO_SET;
758}
759
Willy Tarreau1a18b542018-12-11 16:37:42 +0100760/* Sets the TOS header in IPv4 and the traffic class header in IPv6 packets
761 * (as per RFC3260 #4 and BCP37 #4.2 and #5.2). The connection is tested and if
762 * it is null, nothing is done.
763 */
764static inline void conn_set_tos(const struct connection *conn, int tos)
765{
766 if (!conn || !conn_ctrl_ready(conn))
767 return;
768
769#ifdef IP_TOS
770 if (conn->addr.from.ss_family == AF_INET)
771 setsockopt(conn->handle.fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
772#endif
773#ifdef IPV6_TCLASS
774 if (conn->addr.from.ss_family == AF_INET6) {
775 if (IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)&conn->addr.from)->sin6_addr))
776 /* v4-mapped addresses need IP_TOS */
777 setsockopt(conn->handle.fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
778 else
779 setsockopt(conn->handle.fd, IPPROTO_IPV6, IPV6_TCLASS, &tos, sizeof(tos));
780 }
781#endif
782}
783
784/* Sets the netfilter mark on the connection's socket. The connection is tested
785 * and if it is null, nothing is done.
786 */
787static inline void conn_set_mark(const struct connection *conn, int mark)
788{
789 if (!conn || !conn_ctrl_ready(conn))
790 return;
791
792#ifdef SO_MARK
793 setsockopt(conn->handle.fd, SOL_SOCKET, SO_MARK, &mark, sizeof(mark));
794#endif
795}
796
797/* Sets adjust the TCP quick-ack feature on the connection's socket. The
798 * connection is tested and if it is null, nothing is done.
799 */
800static inline void conn_set_quickack(const struct connection *conn, int value)
801{
802 if (!conn || !conn_ctrl_ready(conn))
803 return;
804
805#ifdef TCP_QUICKACK
806 setsockopt(conn->handle.fd, IPPROTO_TCP, TCP_QUICKACK, &value, sizeof(value));
807#endif
808}
809
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200810/* Attaches a conn_stream to a data layer and sets the relevant callbacks */
811static inline void cs_attach(struct conn_stream *cs, void *data, const struct data_cb *data_cb)
Willy Tarreaudda5e7c2012-09-24 17:15:42 +0200812{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200813 cs->data_cb = data_cb;
814 cs->data = data;
Willy Tarreaubd99aab2012-10-02 20:57:19 +0200815}
816
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200817static inline struct wait_event *wl_set_waitcb(struct wait_event *wl, struct task *(*cb)(struct task *, void *, unsigned short), void *ctx)
Willy Tarreau83188852018-07-18 08:18:20 +0200818{
819 if (!wl->task->process) {
820 wl->task->process = cb;
821 wl->task->context = ctx;
822 }
823 return wl;
824}
825
Willy Tarreau53a47662017-08-28 10:53:00 +0200826/* Installs the connection's mux layer for upper context <ctx>.
827 * Returns < 0 on error.
828 */
Willy Tarreau175a2bb2018-09-12 12:02:05 +0200829static inline int conn_install_mux(struct connection *conn, const struct mux_ops *mux,
Olivier Houchardf502aca2018-12-14 19:42:40 +0100830 void *ctx, struct proxy *prx, struct session *sess)
Willy Tarreau53a47662017-08-28 10:53:00 +0200831{
Willy Tarreau762475e2019-01-10 10:33:32 +0100832 int ret;
833
Willy Tarreau53a47662017-08-28 10:53:00 +0200834 conn->mux = mux;
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100835 conn->ctx = ctx;
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200836 ret = mux->init ? mux->init(conn, prx, sess, &BUF_NULL) : 0;
Willy Tarreau762475e2019-01-10 10:33:32 +0100837 if (ret < 0) {
838 conn->mux = NULL;
839 conn->ctx = NULL;
840 }
841 return ret;
Willy Tarreau53a47662017-08-28 10:53:00 +0200842}
843
Willy Tarreau0af29122012-12-03 15:35:00 +0100844/* returns a human-readable error code for conn->err_code, or NULL if the code
845 * is unknown.
846 */
847static inline const char *conn_err_code_str(struct connection *c)
848{
849 switch (c->err_code) {
850 case CO_ER_NONE: return "Success";
Willy Tarreau45b34e82014-01-24 16:06:50 +0100851
852 case CO_ER_CONF_FDLIM: return "Reached configured maxconn value";
853 case CO_ER_PROC_FDLIM: return "Too many sockets on the process";
854 case CO_ER_SYS_FDLIM: return "Too many sockets on the system";
855 case CO_ER_SYS_MEMLIM: return "Out of system buffers";
856 case CO_ER_NOPROTO: return "Protocol or address family not supported";
857 case CO_ER_SOCK_ERR: return "General socket error";
858 case CO_ER_PORT_RANGE: return "Source port range exhausted";
859 case CO_ER_CANT_BIND: return "Can't bind to source address";
860 case CO_ER_FREE_PORTS: return "Out of local source ports on the system";
861 case CO_ER_ADDR_INUSE: return "Local source address already in use";
862
Willy Tarreau8e3bf692012-12-03 15:41:18 +0100863 case CO_ER_PRX_EMPTY: return "Connection closed while waiting for PROXY protocol header";
864 case CO_ER_PRX_ABORT: return "Connection error while waiting for PROXY protocol header";
Willy Tarreau0af29122012-12-03 15:35:00 +0100865 case CO_ER_PRX_TIMEOUT: return "Timeout while waiting for PROXY protocol header";
Willy Tarreau8e3bf692012-12-03 15:41:18 +0100866 case CO_ER_PRX_TRUNCATED: return "Truncated PROXY protocol header received";
867 case CO_ER_PRX_NOT_HDR: return "Received something which does not look like a PROXY protocol header";
868 case CO_ER_PRX_BAD_HDR: return "Received an invalid PROXY protocol header";
869 case CO_ER_PRX_BAD_PROTO: return "Received an unhandled protocol in the PROXY protocol header";
Bertrand Jacquin93b227d2016-06-04 15:11:10 +0100870
871 case CO_ER_CIP_EMPTY: return "Connection closed while waiting for NetScaler Client IP header";
872 case CO_ER_CIP_ABORT: return "Connection error while waiting for NetScaler Client IP header";
873 case CO_ER_CIP_TRUNCATED: return "Truncated NetScaler Client IP header received";
874 case CO_ER_CIP_BAD_MAGIC: return "Received an invalid NetScaler Client IP magic number";
875 case CO_ER_CIP_BAD_PROTO: return "Received an unhandled protocol in the NetScaler Client IP header";
876
Willy Tarreau20879a02012-12-03 16:32:10 +0100877 case CO_ER_SSL_EMPTY: return "Connection closed during SSL handshake";
878 case CO_ER_SSL_ABORT: return "Connection error during SSL handshake";
Willy Tarreau0af29122012-12-03 15:35:00 +0100879 case CO_ER_SSL_TIMEOUT: return "Timeout during SSL handshake";
Willy Tarreau20879a02012-12-03 16:32:10 +0100880 case CO_ER_SSL_TOO_MANY: return "Too many SSL connections";
881 case CO_ER_SSL_NO_MEM: return "Out of memory when initializing an SSL connection";
882 case CO_ER_SSL_RENEG: return "Rejected a client-initiated SSL renegociation attempt";
883 case CO_ER_SSL_CA_FAIL: return "SSL client CA chain cannot be verified";
884 case CO_ER_SSL_CRT_FAIL: return "SSL client certificate not trusted";
Willy Tarreau71d058c2017-07-26 20:09:56 +0200885 case CO_ER_SSL_MISMATCH: return "Server presented an SSL certificate different from the configured one";
886 case CO_ER_SSL_MISMATCH_SNI: return "Server presented an SSL certificate different from the expected one";
Willy Tarreau20879a02012-12-03 16:32:10 +0100887 case CO_ER_SSL_HANDSHAKE: return "SSL handshake failure";
Willy Tarreaub3966372014-04-25 18:54:29 +0200888 case CO_ER_SSL_HANDSHAKE_HB: return "SSL handshake failure after heartbeat";
Willy Tarreauf51c6982014-04-25 20:02:39 +0200889 case CO_ER_SSL_KILLED_HB: return "Stopped a TLSv1 heartbeat attack (CVE-2014-0160)";
Willy Tarreau830bf612013-12-01 20:29:58 +0100890 case CO_ER_SSL_NO_TARGET: return "Attempt to use SSL on an unknown target (internal error)";
Willy Tarreau0af29122012-12-03 15:35:00 +0100891 }
892 return NULL;
893}
894
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100895static inline const char *conn_get_ctrl_name(const struct connection *conn)
896{
Willy Tarreau5e6a5b32019-04-25 18:35:49 +0200897 if (!conn || !conn_ctrl_ready(conn))
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100898 return "NONE";
899 return conn->ctrl->name;
900}
901
902static inline const char *conn_get_xprt_name(const struct connection *conn)
903{
Willy Tarreau5e6a5b32019-04-25 18:35:49 +0200904 if (!conn || !conn_xprt_ready(conn))
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100905 return "NONE";
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +0100906 return conn->xprt->name;
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100907}
908
Willy Tarreau53a47662017-08-28 10:53:00 +0200909static inline const char *conn_get_mux_name(const struct connection *conn)
910{
Willy Tarreau5e6a5b32019-04-25 18:35:49 +0200911 if (!conn || !conn->mux)
Willy Tarreau53a47662017-08-28 10:53:00 +0200912 return "NONE";
913 return conn->mux->name;
914}
915
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200916static inline const char *cs_get_data_name(const struct conn_stream *cs)
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100917{
Willy Tarreau5e6a5b32019-04-25 18:35:49 +0200918 if (!cs || !cs->data_cb)
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100919 return "NONE";
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200920 return cs->data_cb->name;
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100921}
922
Willy Tarreau13e14102016-12-22 20:25:26 +0100923/* registers pointer to transport layer <id> (XPRT_*) */
924static inline void xprt_register(int id, struct xprt_ops *xprt)
925{
926 if (id >= XPRT_ENTRIES)
927 return;
928 registered_xprt[id] = xprt;
929}
930
931/* returns pointer to transport layer <id> (XPRT_*) or NULL if not registered */
932static inline struct xprt_ops *xprt_get(int id)
933{
934 if (id >= XPRT_ENTRIES)
935 return NULL;
936 return registered_xprt[id];
937}
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100938
Willy Tarreaua9c17412016-12-04 18:42:09 +0100939static inline int conn_get_alpn(const struct connection *conn, const char **str, int *len)
940{
941 if (!conn_xprt_ready(conn) || !conn->xprt->get_alpn)
942 return 0;
Olivier Houcharde179d0e2019-03-21 18:27:17 +0100943 return conn->xprt->get_alpn(conn, conn->xprt_ctx, str, len);
Willy Tarreaua9c17412016-12-04 18:42:09 +0100944}
945
Christopher Faulet32f61c02018-04-10 14:33:41 +0200946/* registers proto mux list <list>. Modifies the list element! */
947static inline void register_mux_proto(struct mux_proto_list *list)
Willy Tarreau2386be62017-09-21 19:40:52 +0200948{
Christopher Faulet32f61c02018-04-10 14:33:41 +0200949 LIST_ADDQ(&mux_proto_list.list, &list->list);
Willy Tarreau2386be62017-09-21 19:40:52 +0200950}
951
Christopher Faulet32f61c02018-04-10 14:33:41 +0200952/* unregisters proto mux list <list> */
953static inline void unregister_mux_proto(struct mux_proto_list *list)
Willy Tarreau2386be62017-09-21 19:40:52 +0200954{
955 LIST_DEL(&list->list);
956 LIST_INIT(&list->list);
957}
958
Christopher Faulete15c6c42018-08-08 10:21:56 +0200959static inline struct mux_proto_list *get_mux_proto(const struct ist proto)
Christopher Faulet98d9fe22018-04-10 14:37:32 +0200960{
961 struct mux_proto_list *item;
Christopher Faulet98d9fe22018-04-10 14:37:32 +0200962
963 list_for_each_entry(item, &mux_proto_list.list, list) {
964 if (isteq(proto, item->token))
965 return item;
966 }
967 return NULL;
968}
969
970/* Lists the known proto mux on <out> */
971static inline void list_mux_proto(FILE *out)
972{
973 struct mux_proto_list *item;
974 struct ist proto;
975 char *mode, *side;
976
Christopher Faulet9c9ef032018-08-08 10:25:57 +0200977 fprintf(out, "Available multiplexer protocols :\n"
Willy Tarreaud3c49d12018-11-30 16:52:32 +0100978 "(protocols marked as <default> cannot be specified using 'proto' keyword)\n");
Christopher Faulet98d9fe22018-04-10 14:37:32 +0200979 list_for_each_entry(item, &mux_proto_list.list, list) {
980 proto = item->token;
981
982 if (item->mode == PROTO_MODE_ANY)
983 mode = "TCP|HTTP";
984 else if (item->mode == PROTO_MODE_TCP)
985 mode = "TCP";
986 else if (item->mode == PROTO_MODE_HTTP)
987 mode = "HTTP";
Willy Tarreaud3c49d12018-11-30 16:52:32 +0100988 else if (item->mode == PROTO_MODE_HTX)
989 mode = "HTX";
990 else if (item->mode == (PROTO_MODE_HTTP | PROTO_MODE_HTX))
991 mode = "HTTP|HTX";
Christopher Faulet98d9fe22018-04-10 14:37:32 +0200992 else
993 mode = "NONE";
994
995 if (item->side == PROTO_SIDE_BOTH)
996 side = "FE|BE";
997 else if (item->side == PROTO_SIDE_FE)
998 side = "FE";
999 else if (item->side == PROTO_SIDE_BE)
1000 side = "BE";
1001 else
1002 side = "NONE";
1003
1004 fprintf(out, " %15s : mode=%-10s side=%s\n",
Christopher Faulet9c9ef032018-08-08 10:25:57 +02001005 (proto.len ? proto.ptr : "<default>"), mode, side);
Christopher Faulet98d9fe22018-04-10 14:37:32 +02001006 }
1007}
1008
Willy Tarreau5fc311c2018-12-02 13:04:43 +01001009/* returns the first mux entry in the list matching the exact same <mux_proto>
1010 * and compatible with the <proto_side> (FE or BE) and the <proto_mode> (TCP or
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001011 * HTTP). <mux_proto> can be empty. Will fall back to the first compatible mux
1012 * with exactly the same <proto_mode> or with an empty name. May return
1013 * null if the code improperly registered the default mux to use as a fallback.
Willy Tarreau2386be62017-09-21 19:40:52 +02001014 */
Willy Tarreau5fc311c2018-12-02 13:04:43 +01001015static inline const struct mux_proto_list *conn_get_best_mux_entry(
1016 const struct ist mux_proto,
1017 int proto_side, int proto_mode)
Willy Tarreau2386be62017-09-21 19:40:52 +02001018{
Christopher Faulet32f61c02018-04-10 14:33:41 +02001019 struct mux_proto_list *item;
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001020 struct mux_proto_list *fallback = NULL;
Willy Tarreau2386be62017-09-21 19:40:52 +02001021
Christopher Faulet32f61c02018-04-10 14:33:41 +02001022 list_for_each_entry(item, &mux_proto_list.list, list) {
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001023 if (!(item->side & proto_side) || !(item->mode & proto_mode))
Willy Tarreau2386be62017-09-21 19:40:52 +02001024 continue;
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001025 if (istlen(mux_proto) && isteq(mux_proto, item->token))
Willy Tarreau5fc311c2018-12-02 13:04:43 +01001026 return item;
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001027 else if (!istlen(item->token)) {
1028 if (!fallback || (item->mode == proto_mode && fallback->mode != proto_mode))
1029 fallback = item;
1030 }
Willy Tarreau2386be62017-09-21 19:40:52 +02001031 }
Willy Tarreau5fc311c2018-12-02 13:04:43 +01001032 return fallback;
1033
1034}
1035
1036/* returns the first mux in the list matching the exact same <mux_proto> and
1037 * compatible with the <proto_side> (FE or BE) and the <proto_mode> (TCP or
1038 * HTTP). <mux_proto> can be empty. Will fall back to the first compatible mux
1039 * with exactly the same <proto_mode> or with an empty name. May return
1040 * null if the code improperly registered the default mux to use as a fallback.
1041 */
1042static inline const struct mux_ops *conn_get_best_mux(struct connection *conn,
1043 const struct ist mux_proto,
1044 int proto_side, int proto_mode)
1045{
1046 const struct mux_proto_list *item;
1047
1048 item = conn_get_best_mux_entry(mux_proto, proto_side, proto_mode);
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001049
Willy Tarreau5fc311c2018-12-02 13:04:43 +01001050 return item ? item->mux : NULL;
Willy Tarreau2386be62017-09-21 19:40:52 +02001051}
1052
Willy Tarreau57f81852018-09-06 14:52:21 +02001053/* returns 0 if the connection is valid and is a frontend connection, otherwise
1054 * returns 1 indicating it's a backend connection. And uninitialized connection
1055 * also returns 1 to better handle the usage in the middle of initialization.
1056 */
1057static inline int conn_is_back(const struct connection *conn)
1058{
1059 return !objt_listener(conn->target);
1060}
1061
Willy Tarreau6ac98ac2018-09-06 11:48:44 +02001062/* returns a pointer to the proxy associated with this connection. For a front
1063 * connection it returns a pointer to the frontend ; for a back connection, it
1064 * returns a pointer to the backend.
1065 */
1066static inline struct proxy *conn_get_proxy(const struct connection *conn)
1067{
1068 struct listener *l;
1069 struct server *s;
1070
1071 /* check if it's a frontend connection */
1072 l = objt_listener(conn->target);
1073 if (l)
1074 return l->bind_conf->frontend;
1075
1076 /* check if it's a backend connection */
1077 s = objt_server(conn->target);
1078 if (s)
1079 return s->proxy;
1080
1081 return objt_proxy(conn->target);
1082}
1083
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001084/* installs the best mux for incoming connection <conn> using the upper context
1085 * <ctx>. If the mux protocol is forced, we use it to find the best
1086 * mux. Otherwise we use the ALPN name, if any. Returns < 0 on error.
Willy Tarreau2386be62017-09-21 19:40:52 +02001087 */
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001088static inline int conn_install_mux_fe(struct connection *conn, void *ctx)
Willy Tarreau2386be62017-09-21 19:40:52 +02001089{
Willy Tarreau55e0da62018-09-20 11:26:52 +02001090 struct bind_conf *bind_conf = __objt_listener(conn->target)->bind_conf;
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001091 const struct mux_ops *mux_ops;
Willy Tarreau2386be62017-09-21 19:40:52 +02001092
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001093 if (bind_conf->mux_proto)
1094 mux_ops = bind_conf->mux_proto->mux;
1095 else {
1096 struct ist mux_proto;
1097 const char *alpn_str = NULL;
1098 int alpn_len = 0;
Willy Tarreau68ad3a42018-10-22 11:49:15 +02001099 int mode;
1100
Christopher Fauletc1918d12019-04-24 15:01:22 +02001101 if (bind_conf->frontend->mode == PR_MODE_HTTP)
1102 mode = ((bind_conf->frontend->options2 & PR_O2_USE_HTX) ? PROTO_MODE_HTX : PROTO_MODE_HTTP);
Willy Tarreau68ad3a42018-10-22 11:49:15 +02001103 else
Christopher Fauletc1918d12019-04-24 15:01:22 +02001104 mode = PROTO_MODE_TCP;
Willy Tarreau2386be62017-09-21 19:40:52 +02001105
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001106 conn_get_alpn(conn, &alpn_str, &alpn_len);
1107 mux_proto = ist2(alpn_str, alpn_len);
1108 mux_ops = conn_get_best_mux(conn, mux_proto, PROTO_SIDE_FE, mode);
1109 if (!mux_ops)
1110 return -1;
1111 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01001112 return conn_install_mux(conn, mux_ops, ctx, bind_conf->frontend, conn->owner);
Willy Tarreau2386be62017-09-21 19:40:52 +02001113}
1114
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001115/* installs the best mux for outgoing connection <conn> using the upper context
1116 * <ctx>. If the mux protocol is forced, we use it to find the best mux. Returns
Willy Tarreau2e0b2b52017-09-15 06:59:55 +02001117 * < 0 on error.
Willy Tarreau2386be62017-09-21 19:40:52 +02001118 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01001119static inline int conn_install_mux_be(struct connection *conn, void *ctx, struct session *sess)
Willy Tarreau2386be62017-09-21 19:40:52 +02001120{
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001121 struct server *srv = objt_server(conn->target);
Willy Tarreau287527a2018-08-08 18:40:44 +02001122 struct proxy *prx = objt_proxy(conn->target);
Willy Tarreau2386be62017-09-21 19:40:52 +02001123 const struct mux_ops *mux_ops;
1124
Willy Tarreau287527a2018-08-08 18:40:44 +02001125 if (srv)
1126 prx = srv->proxy;
1127
1128 if (!prx) // target must be either proxy or server
1129 return -1;
1130
1131 if (srv && srv->mux_proto)
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001132 mux_ops = srv->mux_proto->mux;
1133 else {
Olivier Houchard201b9f42018-11-21 00:16:29 +01001134 struct ist mux_proto;
1135 const char *alpn_str = NULL;
1136 int alpn_len = 0;
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001137 int mode;
1138
Christopher Fauletc1918d12019-04-24 15:01:22 +02001139 if (prx->mode == PR_MODE_HTTP)
1140 mode = ((prx->options2 & PR_O2_USE_HTX) ? PROTO_MODE_HTX : PROTO_MODE_HTTP);
Willy Tarreau68ad3a42018-10-22 11:49:15 +02001141 else
Christopher Fauletc1918d12019-04-24 15:01:22 +02001142 mode = PROTO_MODE_TCP;
Willy Tarreau68ad3a42018-10-22 11:49:15 +02001143
Olivier Houchard201b9f42018-11-21 00:16:29 +01001144 conn_get_alpn(conn, &alpn_str, &alpn_len);
1145 mux_proto = ist2(alpn_str, alpn_len);
1146
1147 mux_ops = conn_get_best_mux(conn, mux_proto, PROTO_SIDE_BE, mode);
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001148 if (!mux_ops)
1149 return -1;
1150 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01001151 return conn_install_mux(conn, mux_ops, ctx, prx, sess);
Willy Tarreau2386be62017-09-21 19:40:52 +02001152}
1153
Christopher Fauletc0016d82019-04-08 10:42:41 +02001154static inline int conn_upgrade_mux_fe(struct connection *conn, void *ctx, struct buffer *buf,
1155 struct ist mux_proto, int mode)
1156{
1157 struct bind_conf *bind_conf = __objt_listener(conn->target)->bind_conf;
1158 const struct mux_ops *old_mux, *new_mux;
1159 void *old_mux_ctx;
1160 const char *alpn_str = NULL;
1161 int alpn_len = 0;
1162
1163 if (!mux_proto.len) {
1164 conn_get_alpn(conn, &alpn_str, &alpn_len);
1165 mux_proto = ist2(alpn_str, alpn_len);
1166 }
1167 new_mux = conn_get_best_mux(conn, mux_proto, PROTO_SIDE_FE, mode);
1168 old_mux = conn->mux;
1169
1170 /* No mux found */
1171 if (!new_mux)
1172 return -1;
1173
1174 /* Same mux, nothing to do */
1175 if (old_mux == new_mux)
1176 return 0;
1177
1178 old_mux_ctx = conn->ctx;
1179 conn->mux = new_mux;
1180 conn->ctx = ctx;
1181 conn_force_unsubscribe(conn);
1182 if (new_mux->init(conn, bind_conf->frontend, conn->owner, buf) == -1) {
1183 /* The mux upgrade failed, so restore the old mux */
1184 conn->ctx = old_mux_ctx;
1185 conn->mux = old_mux;
1186 return -1;
1187 }
1188
1189 /* The mux was upgraded, destroy the old one */
1190 *buf = BUF_NULL;
1191 old_mux->destroy(old_mux_ctx);
1192 return 0;
1193}
1194
Willy Tarreau59f98392012-07-06 14:13:49 +02001195#endif /* _PROTO_CONNECTION_H */
1196
1197/*
1198 * Local variables:
1199 * c-indent-level: 8
1200 * c-basic-offset: 8
1201 * End:
1202 */