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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
Alexander Liu2a54bb72019-05-22 19:44:48 +080063/* scoks4 proxy handshake */
64int conn_send_socks4_proxy_request(struct connection *conn);
65int conn_recv_socks4_proxy_response(struct connection *conn);
66
Willy Tarreaud02cdd22013-12-15 10:23:20 +010067/* returns true is the transport layer is ready */
Willy Tarreauaad69382014-01-23 14:21:42 +010068static inline int conn_xprt_ready(const struct connection *conn)
Willy Tarreaud02cdd22013-12-15 10:23:20 +010069{
Willy Tarreauaad69382014-01-23 14:21:42 +010070 return (conn->flags & CO_FL_XPRT_READY);
Willy Tarreaud02cdd22013-12-15 10:23:20 +010071}
72
73/* returns true is the control layer is ready */
Willy Tarreau3c728722014-01-23 13:50:42 +010074static inline int conn_ctrl_ready(const struct connection *conn)
Willy Tarreaud02cdd22013-12-15 10:23:20 +010075{
76 return (conn->flags & CO_FL_CTRL_READY);
77}
78
Willy Tarreauf79c8172013-10-21 16:30:56 +020079/* Calls the init() function of the transport layer if any and if not done yet,
80 * and sets the CO_FL_XPRT_READY flag to indicate it was properly initialized.
Willy Tarreauf7bc57c2012-10-03 00:19:48 +020081 * Returns <0 in case of error.
Willy Tarreau15678ef2012-08-31 13:54:11 +020082 */
Willy Tarreauf7bc57c2012-10-03 00:19:48 +020083static inline int conn_xprt_init(struct connection *conn)
Willy Tarreau15678ef2012-08-31 13:54:11 +020084{
Willy Tarreauf79c8172013-10-21 16:30:56 +020085 int ret = 0;
86
Willy Tarreauaad69382014-01-23 14:21:42 +010087 if (!conn_xprt_ready(conn) && conn->xprt && conn->xprt->init)
Olivier Houcharde179d0e2019-03-21 18:27:17 +010088 ret = conn->xprt->init(conn, &conn->xprt_ctx);
Willy Tarreauf79c8172013-10-21 16:30:56 +020089
90 if (ret >= 0)
91 conn->flags |= CO_FL_XPRT_READY;
92
93 return ret;
Willy Tarreau15678ef2012-08-31 13:54:11 +020094}
95
Willy Tarreauf79c8172013-10-21 16:30:56 +020096/* Calls the close() function of the transport layer if any and if not done
97 * yet, and clears the CO_FL_XPRT_READY flag. However this is not done if the
98 * CO_FL_XPRT_TRACKED flag is set, which allows logs to take data from the
99 * transport layer very late if needed.
Willy Tarreau6c03a642012-10-12 17:00:05 +0200100 */
Willy Tarreauf7bc57c2012-10-03 00:19:48 +0200101static inline void conn_xprt_close(struct connection *conn)
Willy Tarreau8b117082012-08-06 15:06:49 +0200102{
Willy Tarreauf79c8172013-10-21 16:30:56 +0200103 if ((conn->flags & (CO_FL_XPRT_READY|CO_FL_XPRT_TRACKED)) == CO_FL_XPRT_READY) {
Willy Tarreauaad69382014-01-23 14:21:42 +0100104 if (conn->xprt->close)
Olivier Houcharde179d0e2019-03-21 18:27:17 +0100105 conn->xprt->close(conn, conn->xprt_ctx);
Olivier Houchard478281f2019-05-13 19:10:46 +0200106 conn->xprt_ctx = NULL;
Willy Tarreauf79c8172013-10-21 16:30:56 +0200107 conn->flags &= ~CO_FL_XPRT_READY;
108 }
109}
110
111/* Initializes the connection's control layer which essentially consists in
112 * registering the file descriptor for polling and setting the CO_FL_CTRL_READY
Willy Tarreau3c728722014-01-23 13:50:42 +0100113 * flag. The caller is responsible for ensuring that the control layer is
114 * already assigned to the connection prior to the call.
Willy Tarreauf79c8172013-10-21 16:30:56 +0200115 */
116static inline void conn_ctrl_init(struct connection *conn)
117{
Willy Tarreau3c728722014-01-23 13:50:42 +0100118 if (!conn_ctrl_ready(conn)) {
Willy Tarreau585744b2017-08-24 14:31:19 +0200119 int fd = conn->handle.fd;
Willy Tarreauf79c8172013-10-21 16:30:56 +0200120
Willy Tarreaua9786b62018-01-25 07:22:13 +0100121 fd_insert(fd, conn, conn_fd_handler, tid_bit);
Willy Tarreauf817e9f2014-01-10 16:58:45 +0100122 /* mark the fd as ready so as not to needlessly poll at the beginning */
123 fd_may_recv(fd);
124 fd_may_send(fd);
Willy Tarreauf79c8172013-10-21 16:30:56 +0200125 conn->flags |= CO_FL_CTRL_READY;
Willy Tarreau6c03a642012-10-12 17:00:05 +0200126 }
Willy Tarreau8b117082012-08-06 15:06:49 +0200127}
128
Willy Tarreauf79c8172013-10-21 16:30:56 +0200129/* Deletes the FD if the transport layer is already gone. Once done,
130 * it then removes the CO_FL_CTRL_READY flag.
131 */
132static inline void conn_ctrl_close(struct connection *conn)
133{
134 if ((conn->flags & (CO_FL_XPRT_READY|CO_FL_CTRL_READY)) == CO_FL_CTRL_READY) {
Willy Tarreau585744b2017-08-24 14:31:19 +0200135 fd_delete(conn->handle.fd);
Willy Tarreau6a0a80a2017-10-05 17:43:39 +0200136 conn->handle.fd = DEAD_FD_MAGIC;
Willy Tarreauf79c8172013-10-21 16:30:56 +0200137 conn->flags &= ~CO_FL_CTRL_READY;
138 }
139}
140
Willy Tarreau2b199c92012-11-23 17:32:21 +0100141/* If the connection still has a transport layer, then call its close() function
142 * if any, and delete the file descriptor if a control layer is set. This is
143 * used to close everything at once and atomically. However this is not done if
144 * the CO_FL_XPRT_TRACKED flag is set, which allows logs to take data from the
145 * transport layer very late if needed.
146 */
147static inline void conn_full_close(struct connection *conn)
148{
Willy Tarreauf79c8172013-10-21 16:30:56 +0200149 conn_xprt_close(conn);
150 conn_ctrl_close(conn);
151}
152
Willy Tarreaudc42acd2017-10-05 18:09:20 +0200153/* stop tracking a connection, allowing conn_full_close() to always
154 * succeed.
155 */
156static inline void conn_stop_tracking(struct connection *conn)
157{
158 conn->flags &= ~CO_FL_XPRT_TRACKED;
159}
160
Willy Tarreaue9dfa792012-09-01 17:26:16 +0200161/* Update polling on connection <c>'s file descriptor depending on its current
162 * state as reported in the connection's CO_FL_CURR_* flags, reports of EAGAIN
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200163 * in CO_FL_WAIT_*, and the upper layer expectations indicated by CO_FL_XPRT_*.
Willy Tarreaue9dfa792012-09-01 17:26:16 +0200164 * The connection flags are updated with the new flags at the end of the
Willy Tarreau0ffde2c2012-10-04 22:21:15 +0200165 * operation. Polling is totally disabled if an error was reported.
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200166 */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200167void conn_update_xprt_polling(struct connection *c);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200168
Willy Tarreau7d281492012-12-16 19:19:13 +0100169/* Refresh the connection's polling flags from its file descriptor status.
Willy Tarreau916e12d2017-10-25 09:22:43 +0200170 * This should be called at the beginning of a connection handler. It does
171 * nothing if CO_FL_WILL_UPDATE is present, indicating that an upper caller
172 * has already done it.
Willy Tarreau7d281492012-12-16 19:19:13 +0100173 */
174static inline void conn_refresh_polling_flags(struct connection *conn)
175{
Willy Tarreau916e12d2017-10-25 09:22:43 +0200176 if (conn_ctrl_ready(conn) && !(conn->flags & CO_FL_WILL_UPDATE)) {
Willy Tarreaubc97cc42017-10-25 10:28:45 +0200177 unsigned int flags = conn->flags;
Willy Tarreau7d281492012-12-16 19:19:13 +0100178
Willy Tarreaubc97cc42017-10-25 10:28:45 +0200179 flags &= ~(CO_FL_CURR_RD_ENA | CO_FL_CURR_WR_ENA | CO_FL_WAIT_ROOM);
Willy Tarreau585744b2017-08-24 14:31:19 +0200180 if (fd_recv_active(conn->handle.fd))
Willy Tarreau7d281492012-12-16 19:19:13 +0100181 flags |= CO_FL_CURR_RD_ENA;
Willy Tarreau585744b2017-08-24 14:31:19 +0200182 if (fd_send_active(conn->handle.fd))
Willy Tarreau7d281492012-12-16 19:19:13 +0100183 flags |= CO_FL_CURR_WR_ENA;
184 conn->flags = flags;
185 }
186}
187
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200188/* inspects c->flags and returns non-zero if XPRT ENA changes from the CURR ENA
Willy Tarreauc8dd77f2012-11-05 17:52:26 +0100189 * or if the WAIT flags are set with their respective ENA flags. Additionally,
Willy Tarreau0ffde2c2012-10-04 22:21:15 +0200190 * non-zero is also returned if an error was reported on the connection. This
191 * function is used quite often and is inlined. In order to proceed optimally
192 * with very little code and CPU cycles, the bits are arranged so that a change
Willy Tarreauc8dd77f2012-11-05 17:52:26 +0100193 * can be detected by a few left shifts, a xor, and a mask. These operations
194 * detect when W&D are both enabled for either direction, when C&D differ for
195 * either direction and when Error is set. The trick consists in first keeping
196 * only the bits we're interested in, since they don't collide when shifted,
197 * and to perform the AND at the end. In practice, the compiler is able to
198 * replace the last AND with a TEST in boolean conditions. This results in
199 * checks that are done in 4-6 cycles and less than 30 bytes.
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200200 */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200201static inline unsigned int conn_xprt_polling_changes(const struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200202{
Willy Tarreauc8dd77f2012-11-05 17:52:26 +0100203 unsigned int f = c->flags;
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200204 f &= CO_FL_XPRT_WR_ENA | CO_FL_XPRT_RD_ENA | CO_FL_CURR_WR_ENA |
Willy Tarreau310987a2014-01-22 19:46:33 +0100205 CO_FL_CURR_RD_ENA | CO_FL_ERROR;
Willy Tarreauc8dd77f2012-11-05 17:52:26 +0100206
Willy Tarreau310987a2014-01-22 19:46:33 +0100207 f = (f ^ (f << 1)) & (CO_FL_CURR_WR_ENA|CO_FL_CURR_RD_ENA); /* test C ^ D */
208 return f & (CO_FL_CURR_WR_ENA | CO_FL_CURR_RD_ENA | CO_FL_ERROR);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200209}
210
Olivier Houchard03abf2d2019-05-28 10:12:02 +0200211/* Automatically updates polling on connection <c> depending on the XPRT flags.
212 * It does nothing if CO_FL_WILL_UPDATE is present, indicating that an upper
213 * caller is going to do it again later.
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200214 */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200215static inline void conn_cond_update_xprt_polling(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200216{
Willy Tarreau916e12d2017-10-25 09:22:43 +0200217 if (!(c->flags & CO_FL_WILL_UPDATE))
Olivier Houchard03abf2d2019-05-28 10:12:02 +0200218 if (conn_xprt_polling_changes(c))
Willy Tarreau916e12d2017-10-25 09:22:43 +0200219 conn_update_xprt_polling(c);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200220}
221
Willy Tarreau36fb02c2012-11-24 11:09:07 +0100222/* Stop all polling on the fd. This might be used when an error is encountered
Willy Tarreau916e12d2017-10-25 09:22:43 +0200223 * for example. It does not propage the change to the fd layer if
224 * CO_FL_WILL_UPDATE is present, indicating that an upper caller is going to do
225 * it later.
Willy Tarreau36fb02c2012-11-24 11:09:07 +0100226 */
227static inline void conn_stop_polling(struct connection *c)
228{
229 c->flags &= ~(CO_FL_CURR_RD_ENA | CO_FL_CURR_WR_ENA |
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200230 CO_FL_XPRT_RD_ENA | CO_FL_XPRT_WR_ENA);
Willy Tarreau916e12d2017-10-25 09:22:43 +0200231 if (!(c->flags & CO_FL_WILL_UPDATE) && conn_ctrl_ready(c))
Willy Tarreau585744b2017-08-24 14:31:19 +0200232 fd_stop_both(c->handle.fd);
Willy Tarreau36fb02c2012-11-24 11:09:07 +0100233}
234
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200235/* Automatically update polling on connection <c> depending on the XPRT and
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200236 * SOCK flags, and on whether a handshake is in progress or not. This may be
237 * called at any moment when there is a doubt about the effectiveness of the
238 * polling state, for instance when entering or leaving the handshake state.
Willy Tarreau916e12d2017-10-25 09:22:43 +0200239 * It does nothing if CO_FL_WILL_UPDATE is present, indicating that an upper
240 * caller is going to do it again later.
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200241 */
242static inline void conn_cond_update_polling(struct connection *c)
243{
Willy Tarreau36fb02c2012-11-24 11:09:07 +0100244 if (unlikely(c->flags & CO_FL_ERROR))
245 conn_stop_polling(c);
Willy Tarreau916e12d2017-10-25 09:22:43 +0200246 else if (!(c->flags & CO_FL_WILL_UPDATE)) {
Olivier Houchard03abf2d2019-05-28 10:12:02 +0200247 if (conn_xprt_polling_changes(c))
Willy Tarreau916e12d2017-10-25 09:22:43 +0200248 conn_update_xprt_polling(c);
Willy Tarreau916e12d2017-10-25 09:22:43 +0200249 }
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200250}
251
252/***** Event manipulation primitives for use by DATA I/O callbacks *****/
253/* The __conn_* versions do not propagate to lower layers and are only meant
254 * to be used by handlers called by the connection handler. The other ones
255 * may be used anywhere.
256 */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200257static inline void __conn_xprt_want_recv(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200258{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200259 c->flags |= CO_FL_XPRT_RD_ENA;
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200260}
261
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200262static inline void __conn_xprt_stop_recv(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200263{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200264 c->flags &= ~CO_FL_XPRT_RD_ENA;
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200265}
266
Willy Tarreau796c5b72016-11-29 21:47:02 +0100267/* this one is used only to stop speculative recv(). It doesn't stop it if the
268 * fd is already polled in order to avoid expensive polling status changes.
269 * Since it might require the upper layer to re-enable reading, we'll return 1
270 * if we've really stopped something otherwise zero.
271 */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200272static inline int __conn_xprt_done_recv(struct connection *c)
Willy Tarreau796c5b72016-11-29 21:47:02 +0100273{
Willy Tarreau585744b2017-08-24 14:31:19 +0200274 if (!conn_ctrl_ready(c) || !fd_recv_polled(c->handle.fd)) {
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200275 c->flags &= ~CO_FL_XPRT_RD_ENA;
Willy Tarreau796c5b72016-11-29 21:47:02 +0100276 return 1;
277 }
278 return 0;
279}
280
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200281static inline void __conn_xprt_want_send(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200282{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200283 c->flags |= CO_FL_XPRT_WR_ENA;
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200284}
285
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200286static inline void __conn_xprt_stop_send(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200287{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200288 c->flags &= ~CO_FL_XPRT_WR_ENA;
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200289}
290
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200291static inline void __conn_xprt_stop_both(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200292{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200293 c->flags &= ~(CO_FL_XPRT_WR_ENA | CO_FL_XPRT_RD_ENA);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200294}
295
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200296static inline void conn_xprt_want_recv(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200297{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200298 __conn_xprt_want_recv(c);
299 conn_cond_update_xprt_polling(c);
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 __conn_xprt_stop_recv(c);
305 conn_cond_update_xprt_polling(c);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200306}
307
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200308static inline void conn_xprt_want_send(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200309{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200310 __conn_xprt_want_send(c);
311 conn_cond_update_xprt_polling(c);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200312}
313
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200314static inline void conn_xprt_stop_send(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200315{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200316 __conn_xprt_stop_send(c);
317 conn_cond_update_xprt_polling(c);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200318}
319
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200320static inline void conn_xprt_stop_both(struct connection *c)
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200321{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200322 __conn_xprt_stop_both(c);
323 conn_cond_update_xprt_polling(c);
Willy Tarreaub5e2cbd2012-08-17 11:55:04 +0200324}
325
Willy Tarreau7b271b22017-10-25 09:59:22 +0200326/* read shutdown, called from the rcv_buf/rcv_pipe handlers when
327 * detecting an end of connection.
328 */
Willy Tarreau3af56a92012-08-20 16:55:48 +0200329static inline void conn_sock_read0(struct connection *c)
330{
331 c->flags |= CO_FL_SOCK_RD_SH;
Olivier Houchard03abf2d2019-05-28 10:12:02 +0200332 __conn_xprt_stop_recv(c);
Willy Tarreauad38ace2013-12-15 14:19:38 +0100333 /* we don't risk keeping ports unusable if we found the
334 * zero from the other side.
335 */
Willy Tarreau3c728722014-01-23 13:50:42 +0100336 if (conn_ctrl_ready(c))
Willy Tarreau585744b2017-08-24 14:31:19 +0200337 fdtab[c->handle.fd].linger_risk = 0;
Willy Tarreau3af56a92012-08-20 16:55:48 +0200338}
339
Willy Tarreau7b271b22017-10-25 09:59:22 +0200340/* write shutdown, indication that the upper layer is not willing to send
Willy Tarreaua48c1412017-12-22 18:46:33 +0100341 * anything anymore and wants to close after pending data are sent. The
342 * <clean> argument will allow not to perform the socket layer shutdown if
343 * equal to 0.
Willy Tarreau7b271b22017-10-25 09:59:22 +0200344 */
Willy Tarreaua48c1412017-12-22 18:46:33 +0100345static inline void conn_sock_shutw(struct connection *c, int clean)
Willy Tarreau3af56a92012-08-20 16:55:48 +0200346{
347 c->flags |= CO_FL_SOCK_WR_SH;
Willy Tarreau7b271b22017-10-25 09:59:22 +0200348 conn_refresh_polling_flags(c);
Olivier Houchard03abf2d2019-05-28 10:12:02 +0200349 __conn_xprt_stop_send(c);
350 conn_cond_update_xprt_polling(c);
Willy Tarreau7b271b22017-10-25 09:59:22 +0200351
Willy Tarreaua48c1412017-12-22 18:46:33 +0100352 /* don't perform a clean shutdown if we're going to reset or
353 * if the shutr was already received.
354 */
Olivier Houchardfe4abe62019-06-14 15:26:06 +0200355 if (conn_ctrl_ready(c) && !(c->flags & CO_FL_SOCK_RD_SH) && clean &&
356 !fdtab[c->handle.fd].linger_risk)
Willy Tarreau585744b2017-08-24 14:31:19 +0200357 shutdown(c->handle.fd, SHUT_WR);
Willy Tarreau3af56a92012-08-20 16:55:48 +0200358}
359
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200360static inline void conn_xprt_shutw(struct connection *c)
Willy Tarreau3af56a92012-08-20 16:55:48 +0200361{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200362 __conn_xprt_stop_send(c);
Willy Tarreau729c69f2015-03-12 22:51:10 +0100363
364 /* clean data-layer shutdown */
365 if (c->xprt && c->xprt->shutw)
Olivier Houcharde179d0e2019-03-21 18:27:17 +0100366 c->xprt->shutw(c, c->xprt_ctx, 1);
Willy Tarreau729c69f2015-03-12 22:51:10 +0100367}
368
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200369static inline void conn_xprt_shutw_hard(struct connection *c)
Willy Tarreau729c69f2015-03-12 22:51:10 +0100370{
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200371 __conn_xprt_stop_send(c);
Willy Tarreau729c69f2015-03-12 22:51:10 +0100372
373 /* unclean data-layer shutdown */
374 if (c->xprt && c->xprt->shutw)
Olivier Houcharde179d0e2019-03-21 18:27:17 +0100375 c->xprt->shutw(c, c->xprt_ctx, 0);
Willy Tarreau3af56a92012-08-20 16:55:48 +0200376}
377
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200378/* shut read */
379static inline void cs_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200380{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200381
382 /* clean data-layer shutdown */
383 if (cs->conn->mux && cs->conn->mux->shutr)
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200384 cs->conn->mux->shutr(cs, mode);
385 cs->flags |= (mode == CS_SHR_DRAIN) ? CS_FL_SHRD : CS_FL_SHRR;
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200386}
387
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200388/* shut write */
389static inline void cs_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200390{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200391
392 /* clean data-layer shutdown */
393 if (cs->conn->mux && cs->conn->mux->shutw)
Willy Tarreauecdb3fe2017-10-05 15:25:48 +0200394 cs->conn->mux->shutw(cs, mode);
395 cs->flags |= (mode == CS_SHW_NORMAL) ? CS_FL_SHWN : CS_FL_SHWS;
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200396}
397
Willy Tarreau6978db32017-10-05 18:19:43 +0200398/* completely close a conn_stream (but do not detach it) */
399static inline void cs_close(struct conn_stream *cs)
400{
401 cs_shutw(cs, CS_SHW_SILENT);
402 cs_shutr(cs, CS_SHR_RESET);
403 cs->flags = CS_FL_NONE;
404}
405
Willy Tarreaue9f43012018-12-19 17:59:30 +0100406/* sets CS_FL_ERROR or CS_FL_ERR_PENDING on the cs */
407static inline void cs_set_error(struct conn_stream *cs)
408{
409 if (cs->flags & CS_FL_EOS)
410 cs->flags |= CS_FL_ERROR;
411 else
Willy Tarreau7bb39d72019-06-03 14:23:33 +0200412 cs->flags |= CS_FL_ERR_PENDING;
Willy Tarreaue9f43012018-12-19 17:59:30 +0100413}
414
Willy Tarreau3af56a92012-08-20 16:55:48 +0200415/* detect sock->data read0 transition */
Olivier Houchard1a0545f2017-09-13 18:30:23 +0200416static inline int conn_xprt_read0_pending(struct connection *c)
Willy Tarreau3af56a92012-08-20 16:55:48 +0200417{
Willy Tarreau54e917c2017-08-30 07:35:35 +0200418 return (c->flags & CO_FL_SOCK_RD_SH) != 0;
Willy Tarreau3af56a92012-08-20 16:55:48 +0200419}
420
Willy Tarreau910c6aa2013-10-24 15:08:37 +0200421/* prepares a connection to work with protocol <proto> and transport <xprt>.
Willy Tarreau53a47662017-08-28 10:53:00 +0200422 * The transport's is initialized as well, and the mux and its context are
Willy Tarreaube373152018-09-06 11:45:30 +0200423 * cleared. The target is not reinitialized and it is recommended that it is
424 * set prior to calling this function so that the function may make use of it
425 * in the future to refine the mux choice if needed.
Willy Tarreau910c6aa2013-10-24 15:08:37 +0200426 */
427static inline void conn_prepare(struct connection *conn, const struct protocol *proto, const struct xprt_ops *xprt)
428{
429 conn->ctrl = proto;
430 conn->xprt = xprt;
Willy Tarreau53a47662017-08-28 10:53:00 +0200431 conn->mux = NULL;
Willy Tarreau910c6aa2013-10-24 15:08:37 +0200432 conn->xprt_ctx = NULL;
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100433 conn->ctx = NULL;
Willy Tarreau910c6aa2013-10-24 15:08:37 +0200434}
435
Willy Tarreau63dd75d2017-10-08 15:16:00 +0200436/*
437 * Initializes all required fields for a new conn_strema.
438 */
439static inline void cs_init(struct conn_stream *cs, struct connection *conn)
440{
441 cs->obj_type = OBJ_TYPE_CS;
442 cs->flags = CS_FL_NONE;
443 cs->conn = conn;
444}
445
Willy Tarreaud0155772013-10-14 17:10:08 +0200446/* Initializes all required fields for a new connection. Note that it does the
447 * minimum acceptable initialization for a connection that already exists and
448 * is about to be reused. It also leaves the addresses untouched, which makes
449 * it usable across connection retries to reset a connection to a known state.
450 */
451static inline void conn_init(struct connection *conn)
452{
453 conn->obj_type = OBJ_TYPE_CONN;
454 conn->flags = CO_FL_NONE;
Willy Tarreau53a47662017-08-28 10:53:00 +0200455 conn->mux = NULL;
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100456 conn->ctx = NULL;
Willy Tarreaud0155772013-10-14 17:10:08 +0200457 conn->owner = NULL;
Willy Tarreaub8020ce2013-10-24 21:10:08 +0200458 conn->send_proxy_ofs = 0;
Willy Tarreau585744b2017-08-24 14:31:19 +0200459 conn->handle.fd = DEAD_FD_MAGIC;
Willy Tarreaud0155772013-10-14 17:10:08 +0200460 conn->err_code = CO_ER_NONE;
461 conn->target = NULL;
Willy Tarreau8e3c6ce2017-08-28 15:46:01 +0200462 conn->xprt_done_cb = NULL;
Willy Tarreau436d3332017-10-08 11:16:46 +0200463 conn->destroy_cb = NULL;
KOVACS Krisztianb3e54fe2014-11-17 15:11:45 +0100464 conn->proxy_netns = NULL;
Willy Tarreaud75d40e2015-08-04 17:25:58 +0200465 LIST_INIT(&conn->list);
Olivier Houchard131fd892018-11-13 16:44:31 +0100466 LIST_INIT(&conn->session_list);
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200467 conn->send_wait = NULL;
468 conn->recv_wait = NULL;
Olivier Houchard006e3102018-12-10 18:30:32 +0100469 conn->idle_time = 0;
Willy Tarreaud0155772013-10-14 17:10:08 +0200470}
471
Willy Tarreau8e3c6ce2017-08-28 15:46:01 +0200472/* sets <owner> as the connection's owner */
Willy Tarreau436d3332017-10-08 11:16:46 +0200473static inline void conn_set_owner(struct connection *conn, void *owner, void (*cb)(struct connection *))
Willy Tarreau8e3c6ce2017-08-28 15:46:01 +0200474{
475 conn->owner = owner;
Willy Tarreau436d3332017-10-08 11:16:46 +0200476 conn->destroy_cb = cb;
Willy Tarreau8e3c6ce2017-08-28 15:46:01 +0200477}
478
479/* registers <cb> as a callback to notify for transport's readiness or failure */
480static inline void conn_set_xprt_done_cb(struct connection *conn, int (*cb)(struct connection *))
481{
482 conn->xprt_done_cb = cb;
483}
484
485/* unregisters the callback to notify for transport's readiness or failure */
486static inline void conn_clear_xprt_done_cb(struct connection *conn)
487{
488 conn->xprt_done_cb = NULL;
489}
490
Willy Tarreaub97f3b12013-10-20 22:56:45 +0200491/* Tries to allocate a new connection and initialized its main fields. The
492 * connection is returned on success, NULL on failure. The connection must
Willy Tarreaubafbe012017-11-24 17:34:44 +0100493 * be released using pool_free() or conn_free().
Willy Tarreaub97f3b12013-10-20 22:56:45 +0200494 */
495static inline struct connection *conn_new()
496{
497 struct connection *conn;
498
Willy Tarreaubafbe012017-11-24 17:34:44 +0100499 conn = pool_alloc(pool_head_connection);
Willy Tarreaub97f3b12013-10-20 22:56:45 +0200500 if (likely(conn != NULL))
501 conn_init(conn);
502 return conn;
503}
504
Willy Tarreau5e1cc5e2018-03-02 10:43:58 +0100505/* Releases a conn_stream previously allocated by cs_new(), as well as any
506 * buffer it would still hold.
507 */
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200508static inline void cs_free(struct conn_stream *cs)
509{
Willy Tarreau5e1cc5e2018-03-02 10:43:58 +0100510
Willy Tarreaubafbe012017-11-24 17:34:44 +0100511 pool_free(pool_head_connstream, cs);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200512}
513
514/* Tries to allocate a new conn_stream and initialize its main fields. If
515 * <conn> is NULL, then a new connection is allocated on the fly, initialized,
516 * and assigned to cs->conn ; this connection will then have to be released
Willy Tarreaubafbe012017-11-24 17:34:44 +0100517 * using pool_free() or conn_free(). The conn_stream is initialized and added
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200518 * to the mux's stream list on success, then returned. On failure, nothing is
519 * allocated and NULL is returned.
Willy Tarreau63dd75d2017-10-08 15:16:00 +0200520 */
521static inline struct conn_stream *cs_new(struct connection *conn)
522{
523 struct conn_stream *cs;
524
Willy Tarreaubafbe012017-11-24 17:34:44 +0100525 cs = pool_alloc(pool_head_connstream);
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200526 if (!likely(cs))
527 return NULL;
Willy Tarreau63dd75d2017-10-08 15:16:00 +0200528
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200529 if (!conn) {
530 conn = conn_new();
531 if (!likely(conn)) {
532 cs_free(cs);
533 return NULL;
534 }
535 conn_init(conn);
536 }
537
538 cs_init(cs, conn);
539 return cs;
Willy Tarreau63dd75d2017-10-08 15:16:00 +0200540}
541
Willy Tarreaufafd3982018-11-18 21:29:20 +0100542/* Retrieves any valid conn_stream from this connection, preferably the first
543 * valid one. The purpose is to be able to figure one other end of a private
544 * connection for purposes like source binding or proxy protocol header
545 * emission. In such cases, any conn_stream is expected to be valid so the
546 * mux is encouraged to return the first one it finds. If the connection has
547 * no mux or the mux has no get_first_cs() method or the mux has no valid
548 * conn_stream, NULL is returned. The output pointer is purposely marked
549 * const to discourage the caller from modifying anything there.
550 */
551static inline const struct conn_stream *cs_get_first(const struct connection *conn)
552{
553 if (!conn || !conn->mux || !conn->mux->get_first_cs)
554 return NULL;
555 return conn->mux->get_first_cs(conn);
556}
557
Olivier Houchard1fddc9b2018-10-21 00:32:01 +0200558static inline void conn_force_unsubscribe(struct connection *conn)
Willy Tarreaub97f3b12013-10-20 22:56:45 +0200559{
Olivier Houchard1fddc9b2018-10-21 00:32:01 +0200560 if (conn->recv_wait) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100561 conn->recv_wait->events &= ~SUB_RETRY_RECV;
Olivier Houchard1fddc9b2018-10-21 00:32:01 +0200562 conn->recv_wait = NULL;
563 }
564 if (conn->send_wait) {
Willy Tarreau4f6516d2018-12-19 13:59:17 +0100565 conn->send_wait->events &= ~SUB_RETRY_SEND;
Olivier Houchard1fddc9b2018-10-21 00:32:01 +0200566 conn->send_wait = NULL;
567 }
568
569}
570
571/* Releases a connection previously allocated by conn_new() */
572static inline void conn_free(struct connection *conn)
573{
Olivier Houchard00cf70f2018-11-30 17:24:55 +0100574 /* Remove ourself from the session's connections list, if any. */
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +0100575 if (!LIST_ISEMPTY(&conn->session_list)) {
576 struct session *sess = conn->owner;
Olivier Houcharda2dbeb22018-12-28 18:50:57 +0100577 if (conn->flags & CO_FL_SESS_IDLE)
578 sess->idle_conns--;
Olivier Houchard351411f2018-12-27 17:20:54 +0100579 session_unown_conn(sess, conn);
Olivier Houcharda4d4fdf2018-12-14 19:27:06 +0100580 }
Willy Tarreau94031d32018-12-19 14:36:29 +0100581
582 /* By convention we always place a NULL where the ctx points to if the
583 * mux is null. It may have been used to store the connection as a
584 * stream_interface's end point for example.
Olivier Houchard201b9f42018-11-21 00:16:29 +0100585 */
Willy Tarreau94031d32018-12-19 14:36:29 +0100586 if (conn->ctx != NULL && conn->mux == NULL)
587 *(void **)conn->ctx = NULL;
Olivier Houchard201b9f42018-11-21 00:16:29 +0100588
Olivier Houchard006e3102018-12-10 18:30:32 +0100589 /* The connection is currently in the server's idle list, so tell it
590 * there's one less connection available in that list.
591 */
592 if (conn->idle_time > 0) {
593 struct server *srv = __objt_server(conn->target);
Olivier Houchard237985b2019-03-13 18:52:21 +0100594 _HA_ATOMIC_SUB(&srv->curr_idle_conns, 1);
Olivier Houchardf1314812019-02-18 16:41:17 +0100595 srv->curr_idle_thr[tid]--;
Olivier Houchard006e3102018-12-10 18:30:32 +0100596 }
Olivier Houchard201b9f42018-11-21 00:16:29 +0100597
Olivier Houchard1fddc9b2018-10-21 00:32:01 +0200598 conn_force_unsubscribe(conn);
Olivier Houchard7f1bc312019-01-22 16:11:03 +0100599 LIST_DEL_LOCKED(&conn->list);
Willy Tarreaubafbe012017-11-24 17:34:44 +0100600 pool_free(pool_head_connection, conn);
Willy Tarreaub97f3b12013-10-20 22:56:45 +0200601}
602
Olivier Houchard7c6f8b12018-11-13 16:48:36 +0100603/* Release a conn_stream */
Willy Tarreau63dd75d2017-10-08 15:16:00 +0200604static inline void cs_destroy(struct conn_stream *cs)
605{
Olivier Houchard302f9ef2018-04-13 15:50:27 +0200606 if (cs->conn->mux)
607 cs->conn->mux->detach(cs);
608 else {
609 /* It's too early to have a mux, let's just destroy
610 * the connection
611 */
612 struct connection *conn = cs->conn;
613
614 conn_stop_tracking(conn);
615 conn_full_close(conn);
616 if (conn->destroy_cb)
617 conn->destroy_cb(conn);
618 conn_free(conn);
619 }
Willy Tarreau63dd75d2017-10-08 15:16:00 +0200620 cs_free(cs);
621}
622
Olivier Houcharde2b40b92017-09-13 18:30:23 +0200623/* Returns the conn from a cs. If cs is NULL, returns NULL */
624static inline struct connection *cs_conn(const struct conn_stream *cs)
625{
626 return cs ? cs->conn : NULL;
627}
Willy Tarreaub97f3b12013-10-20 22:56:45 +0200628
Willy Tarreau986a9d22012-08-30 21:11:38 +0200629/* Retrieves the connection's source address */
630static inline void conn_get_from_addr(struct connection *conn)
631{
632 if (conn->flags & CO_FL_ADDR_FROM_SET)
633 return;
634
Willy Tarreau3c728722014-01-23 13:50:42 +0100635 if (!conn_ctrl_ready(conn) || !conn->ctrl->get_src)
Willy Tarreau986a9d22012-08-30 21:11:38 +0200636 return;
637
Willy Tarreau585744b2017-08-24 14:31:19 +0200638 if (conn->ctrl->get_src(conn->handle.fd, (struct sockaddr *)&conn->addr.from,
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100639 sizeof(conn->addr.from),
640 obj_type(conn->target) != OBJ_TYPE_LISTENER) == -1)
Willy Tarreau986a9d22012-08-30 21:11:38 +0200641 return;
642 conn->flags |= CO_FL_ADDR_FROM_SET;
643}
644
645/* Retrieves the connection's original destination address */
646static inline void conn_get_to_addr(struct connection *conn)
647{
648 if (conn->flags & CO_FL_ADDR_TO_SET)
649 return;
650
Willy Tarreau3c728722014-01-23 13:50:42 +0100651 if (!conn_ctrl_ready(conn) || !conn->ctrl->get_dst)
Willy Tarreau986a9d22012-08-30 21:11:38 +0200652 return;
653
Willy Tarreau585744b2017-08-24 14:31:19 +0200654 if (conn->ctrl->get_dst(conn->handle.fd, (struct sockaddr *)&conn->addr.to,
Willy Tarreau3fdb3662012-11-12 00:42:33 +0100655 sizeof(conn->addr.to),
656 obj_type(conn->target) != OBJ_TYPE_LISTENER) == -1)
Willy Tarreau986a9d22012-08-30 21:11:38 +0200657 return;
658 conn->flags |= CO_FL_ADDR_TO_SET;
659}
660
Willy Tarreau1a18b542018-12-11 16:37:42 +0100661/* Sets the TOS header in IPv4 and the traffic class header in IPv6 packets
662 * (as per RFC3260 #4 and BCP37 #4.2 and #5.2). The connection is tested and if
663 * it is null, nothing is done.
664 */
665static inline void conn_set_tos(const struct connection *conn, int tos)
666{
667 if (!conn || !conn_ctrl_ready(conn))
668 return;
669
670#ifdef IP_TOS
671 if (conn->addr.from.ss_family == AF_INET)
672 setsockopt(conn->handle.fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
673#endif
674#ifdef IPV6_TCLASS
675 if (conn->addr.from.ss_family == AF_INET6) {
676 if (IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)&conn->addr.from)->sin6_addr))
677 /* v4-mapped addresses need IP_TOS */
678 setsockopt(conn->handle.fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
679 else
680 setsockopt(conn->handle.fd, IPPROTO_IPV6, IPV6_TCLASS, &tos, sizeof(tos));
681 }
682#endif
683}
684
685/* Sets the netfilter mark on the connection's socket. The connection is tested
686 * and if it is null, nothing is done.
687 */
688static inline void conn_set_mark(const struct connection *conn, int mark)
689{
690 if (!conn || !conn_ctrl_ready(conn))
691 return;
692
693#ifdef SO_MARK
694 setsockopt(conn->handle.fd, SOL_SOCKET, SO_MARK, &mark, sizeof(mark));
695#endif
696}
697
698/* Sets adjust the TCP quick-ack feature on the connection's socket. The
699 * connection is tested and if it is null, nothing is done.
700 */
701static inline void conn_set_quickack(const struct connection *conn, int value)
702{
703 if (!conn || !conn_ctrl_ready(conn))
704 return;
705
706#ifdef TCP_QUICKACK
707 setsockopt(conn->handle.fd, IPPROTO_TCP, TCP_QUICKACK, &value, sizeof(value));
708#endif
709}
710
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200711/* Attaches a conn_stream to a data layer and sets the relevant callbacks */
712static inline void cs_attach(struct conn_stream *cs, void *data, const struct data_cb *data_cb)
Willy Tarreaudda5e7c2012-09-24 17:15:42 +0200713{
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200714 cs->data_cb = data_cb;
715 cs->data = data;
Willy Tarreaubd99aab2012-10-02 20:57:19 +0200716}
717
Olivier Houchardfa8aa862018-10-10 18:25:41 +0200718static 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 +0200719{
Willy Tarreau3c39a7d2019-06-14 14:42:29 +0200720 if (!wl->tasklet->process) {
721 wl->tasklet->process = cb;
722 wl->tasklet->context = ctx;
Willy Tarreau83188852018-07-18 08:18:20 +0200723 }
724 return wl;
725}
726
Willy Tarreau53a47662017-08-28 10:53:00 +0200727/* Installs the connection's mux layer for upper context <ctx>.
728 * Returns < 0 on error.
729 */
Willy Tarreau175a2bb2018-09-12 12:02:05 +0200730static inline int conn_install_mux(struct connection *conn, const struct mux_ops *mux,
Olivier Houchardf502aca2018-12-14 19:42:40 +0100731 void *ctx, struct proxy *prx, struct session *sess)
Willy Tarreau53a47662017-08-28 10:53:00 +0200732{
Willy Tarreau762475e2019-01-10 10:33:32 +0100733 int ret;
734
Willy Tarreau53a47662017-08-28 10:53:00 +0200735 conn->mux = mux;
Willy Tarreau3d2ee552018-12-19 14:12:10 +0100736 conn->ctx = ctx;
Christopher Faulet51f73eb2019-04-08 11:22:47 +0200737 ret = mux->init ? mux->init(conn, prx, sess, &BUF_NULL) : 0;
Willy Tarreau762475e2019-01-10 10:33:32 +0100738 if (ret < 0) {
739 conn->mux = NULL;
740 conn->ctx = NULL;
741 }
742 return ret;
Willy Tarreau53a47662017-08-28 10:53:00 +0200743}
744
Willy Tarreau0af29122012-12-03 15:35:00 +0100745/* returns a human-readable error code for conn->err_code, or NULL if the code
746 * is unknown.
747 */
748static inline const char *conn_err_code_str(struct connection *c)
749{
750 switch (c->err_code) {
751 case CO_ER_NONE: return "Success";
Willy Tarreau45b34e82014-01-24 16:06:50 +0100752
753 case CO_ER_CONF_FDLIM: return "Reached configured maxconn value";
754 case CO_ER_PROC_FDLIM: return "Too many sockets on the process";
755 case CO_ER_SYS_FDLIM: return "Too many sockets on the system";
756 case CO_ER_SYS_MEMLIM: return "Out of system buffers";
757 case CO_ER_NOPROTO: return "Protocol or address family not supported";
758 case CO_ER_SOCK_ERR: return "General socket error";
759 case CO_ER_PORT_RANGE: return "Source port range exhausted";
760 case CO_ER_CANT_BIND: return "Can't bind to source address";
761 case CO_ER_FREE_PORTS: return "Out of local source ports on the system";
762 case CO_ER_ADDR_INUSE: return "Local source address already in use";
763
Willy Tarreau8e3bf692012-12-03 15:41:18 +0100764 case CO_ER_PRX_EMPTY: return "Connection closed while waiting for PROXY protocol header";
765 case CO_ER_PRX_ABORT: return "Connection error while waiting for PROXY protocol header";
Willy Tarreau0af29122012-12-03 15:35:00 +0100766 case CO_ER_PRX_TIMEOUT: return "Timeout while waiting for PROXY protocol header";
Willy Tarreau8e3bf692012-12-03 15:41:18 +0100767 case CO_ER_PRX_TRUNCATED: return "Truncated PROXY protocol header received";
768 case CO_ER_PRX_NOT_HDR: return "Received something which does not look like a PROXY protocol header";
769 case CO_ER_PRX_BAD_HDR: return "Received an invalid PROXY protocol header";
770 case CO_ER_PRX_BAD_PROTO: return "Received an unhandled protocol in the PROXY protocol header";
Bertrand Jacquin93b227d2016-06-04 15:11:10 +0100771
772 case CO_ER_CIP_EMPTY: return "Connection closed while waiting for NetScaler Client IP header";
773 case CO_ER_CIP_ABORT: return "Connection error while waiting for NetScaler Client IP header";
774 case CO_ER_CIP_TRUNCATED: return "Truncated NetScaler Client IP header received";
775 case CO_ER_CIP_BAD_MAGIC: return "Received an invalid NetScaler Client IP magic number";
776 case CO_ER_CIP_BAD_PROTO: return "Received an unhandled protocol in the NetScaler Client IP header";
777
Willy Tarreau20879a02012-12-03 16:32:10 +0100778 case CO_ER_SSL_EMPTY: return "Connection closed during SSL handshake";
779 case CO_ER_SSL_ABORT: return "Connection error during SSL handshake";
Willy Tarreau0af29122012-12-03 15:35:00 +0100780 case CO_ER_SSL_TIMEOUT: return "Timeout during SSL handshake";
Willy Tarreau20879a02012-12-03 16:32:10 +0100781 case CO_ER_SSL_TOO_MANY: return "Too many SSL connections";
782 case CO_ER_SSL_NO_MEM: return "Out of memory when initializing an SSL connection";
783 case CO_ER_SSL_RENEG: return "Rejected a client-initiated SSL renegociation attempt";
784 case CO_ER_SSL_CA_FAIL: return "SSL client CA chain cannot be verified";
785 case CO_ER_SSL_CRT_FAIL: return "SSL client certificate not trusted";
Willy Tarreau71d058c2017-07-26 20:09:56 +0200786 case CO_ER_SSL_MISMATCH: return "Server presented an SSL certificate different from the configured one";
787 case CO_ER_SSL_MISMATCH_SNI: return "Server presented an SSL certificate different from the expected one";
Willy Tarreau20879a02012-12-03 16:32:10 +0100788 case CO_ER_SSL_HANDSHAKE: return "SSL handshake failure";
Willy Tarreaub3966372014-04-25 18:54:29 +0200789 case CO_ER_SSL_HANDSHAKE_HB: return "SSL handshake failure after heartbeat";
Willy Tarreauf51c6982014-04-25 20:02:39 +0200790 case CO_ER_SSL_KILLED_HB: return "Stopped a TLSv1 heartbeat attack (CVE-2014-0160)";
Willy Tarreau830bf612013-12-01 20:29:58 +0100791 case CO_ER_SSL_NO_TARGET: return "Attempt to use SSL on an unknown target (internal error)";
Alexander Liu2a54bb72019-05-22 19:44:48 +0800792
793 case CO_ER_SOCKS4_SEND: return "SOCKS4 Proxy write error during handshake";
794 case CO_ER_SOCKS4_RECV: return "SOCKS4 Proxy read error during handshake";
795 case CO_ER_SOCKS4_DENY: return "SOCKS4 Proxy deny the request";
796 case CO_ER_SOCKS4_ABORT: return "SOCKS4 Proxy handshake aborted by server";
Willy Tarreau0af29122012-12-03 15:35:00 +0100797 }
798 return NULL;
799}
800
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100801static inline const char *conn_get_ctrl_name(const struct connection *conn)
802{
Willy Tarreau5e6a5b32019-04-25 18:35:49 +0200803 if (!conn || !conn_ctrl_ready(conn))
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100804 return "NONE";
805 return conn->ctrl->name;
806}
807
808static inline const char *conn_get_xprt_name(const struct connection *conn)
809{
Willy Tarreau5e6a5b32019-04-25 18:35:49 +0200810 if (!conn || !conn_xprt_ready(conn))
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100811 return "NONE";
Willy Tarreau8e0bb0a2016-11-24 16:58:12 +0100812 return conn->xprt->name;
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100813}
814
Willy Tarreau53a47662017-08-28 10:53:00 +0200815static inline const char *conn_get_mux_name(const struct connection *conn)
816{
Willy Tarreau5e6a5b32019-04-25 18:35:49 +0200817 if (!conn || !conn->mux)
Willy Tarreau53a47662017-08-28 10:53:00 +0200818 return "NONE";
819 return conn->mux->name;
820}
821
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200822static inline const char *cs_get_data_name(const struct conn_stream *cs)
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100823{
Willy Tarreau5e6a5b32019-04-25 18:35:49 +0200824 if (!cs || !cs->data_cb)
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100825 return "NONE";
Olivier Houchard9aaf7782017-09-13 18:30:23 +0200826 return cs->data_cb->name;
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100827}
828
Willy Tarreau13e14102016-12-22 20:25:26 +0100829/* registers pointer to transport layer <id> (XPRT_*) */
830static inline void xprt_register(int id, struct xprt_ops *xprt)
831{
832 if (id >= XPRT_ENTRIES)
833 return;
834 registered_xprt[id] = xprt;
835}
836
837/* returns pointer to transport layer <id> (XPRT_*) or NULL if not registered */
838static inline struct xprt_ops *xprt_get(int id)
839{
840 if (id >= XPRT_ENTRIES)
841 return NULL;
842 return registered_xprt[id];
843}
Willy Tarreau2dc770c2016-11-23 18:00:08 +0100844
Olivier Houchardfe50bfb2019-05-27 12:09:19 +0200845/* Try to add a handshake pseudo-XPRT. If the connection's first XPRT is
846 * raw_sock, then just use the new XPRT as the connection XPRT, otherwise
847 * call the xprt's add_xprt() method.
848 * Returns 0 on success, or non-zero on failure.
849 */
850static inline int xprt_add_hs(struct connection *conn)
851{
852 void *xprt_ctx = NULL;
853 const struct xprt_ops *ops = xprt_get(XPRT_HANDSHAKE);
854 void *nextxprt_ctx = NULL;
855 const struct xprt_ops *nextxprt_ops = NULL;
856
857 if (conn->flags & CO_FL_ERROR)
858 return -1;
859 if (ops->init(conn, &xprt_ctx) < 0)
860 return -1;
861 if (conn->xprt == xprt_get(XPRT_RAW)) {
862 nextxprt_ctx = conn->xprt_ctx;
863 nextxprt_ops = conn->xprt;
864 conn->xprt_ctx = xprt_ctx;
865 conn->xprt = ops;
866 } else {
867 if (conn->xprt->add_xprt(conn, conn->xprt_ctx, xprt_ctx, ops,
868 &nextxprt_ctx, &nextxprt_ops) != 0) {
869 ops->close(conn, xprt_ctx);
870 return -1;
871 }
872 }
873 if (ops->add_xprt(conn, xprt_ctx, nextxprt_ctx, nextxprt_ops, NULL, NULL) != 0) {
874 ops->close(conn, xprt_ctx);
875 return -1;
876 }
877 return 0;
878}
879
Willy Tarreaua9c17412016-12-04 18:42:09 +0100880static inline int conn_get_alpn(const struct connection *conn, const char **str, int *len)
881{
882 if (!conn_xprt_ready(conn) || !conn->xprt->get_alpn)
883 return 0;
Olivier Houcharde179d0e2019-03-21 18:27:17 +0100884 return conn->xprt->get_alpn(conn, conn->xprt_ctx, str, len);
Willy Tarreaua9c17412016-12-04 18:42:09 +0100885}
886
Christopher Faulet32f61c02018-04-10 14:33:41 +0200887/* registers proto mux list <list>. Modifies the list element! */
888static inline void register_mux_proto(struct mux_proto_list *list)
Willy Tarreau2386be62017-09-21 19:40:52 +0200889{
Christopher Faulet32f61c02018-04-10 14:33:41 +0200890 LIST_ADDQ(&mux_proto_list.list, &list->list);
Willy Tarreau2386be62017-09-21 19:40:52 +0200891}
892
Christopher Faulet32f61c02018-04-10 14:33:41 +0200893/* unregisters proto mux list <list> */
894static inline void unregister_mux_proto(struct mux_proto_list *list)
Willy Tarreau2386be62017-09-21 19:40:52 +0200895{
896 LIST_DEL(&list->list);
897 LIST_INIT(&list->list);
898}
899
Christopher Faulete15c6c42018-08-08 10:21:56 +0200900static inline struct mux_proto_list *get_mux_proto(const struct ist proto)
Christopher Faulet98d9fe22018-04-10 14:37:32 +0200901{
902 struct mux_proto_list *item;
Christopher Faulet98d9fe22018-04-10 14:37:32 +0200903
904 list_for_each_entry(item, &mux_proto_list.list, list) {
905 if (isteq(proto, item->token))
906 return item;
907 }
908 return NULL;
909}
910
911/* Lists the known proto mux on <out> */
912static inline void list_mux_proto(FILE *out)
913{
914 struct mux_proto_list *item;
915 struct ist proto;
916 char *mode, *side;
917
Christopher Faulet9c9ef032018-08-08 10:25:57 +0200918 fprintf(out, "Available multiplexer protocols :\n"
Willy Tarreaud3c49d12018-11-30 16:52:32 +0100919 "(protocols marked as <default> cannot be specified using 'proto' keyword)\n");
Christopher Faulet98d9fe22018-04-10 14:37:32 +0200920 list_for_each_entry(item, &mux_proto_list.list, list) {
921 proto = item->token;
922
923 if (item->mode == PROTO_MODE_ANY)
924 mode = "TCP|HTTP";
925 else if (item->mode == PROTO_MODE_TCP)
926 mode = "TCP";
927 else if (item->mode == PROTO_MODE_HTTP)
928 mode = "HTTP";
Willy Tarreaud3c49d12018-11-30 16:52:32 +0100929 else if (item->mode == PROTO_MODE_HTX)
930 mode = "HTX";
931 else if (item->mode == (PROTO_MODE_HTTP | PROTO_MODE_HTX))
932 mode = "HTTP|HTX";
Christopher Faulet98d9fe22018-04-10 14:37:32 +0200933 else
934 mode = "NONE";
935
936 if (item->side == PROTO_SIDE_BOTH)
937 side = "FE|BE";
938 else if (item->side == PROTO_SIDE_FE)
939 side = "FE";
940 else if (item->side == PROTO_SIDE_BE)
941 side = "BE";
942 else
943 side = "NONE";
944
Willy Tarreauca2a3cc2019-05-22 11:44:03 +0200945 fprintf(out, " %15s : mode=%-10s side=%-8s mux=%s\n",
946 (proto.len ? proto.ptr : "<default>"), mode, side, item->mux->name);
Christopher Faulet98d9fe22018-04-10 14:37:32 +0200947 }
948}
949
Willy Tarreau5fc311c2018-12-02 13:04:43 +0100950/* returns the first mux entry in the list matching the exact same <mux_proto>
951 * and compatible with the <proto_side> (FE or BE) and the <proto_mode> (TCP or
Christopher Faulet7ce0c892018-04-10 15:01:45 +0200952 * HTTP). <mux_proto> can be empty. Will fall back to the first compatible mux
953 * with exactly the same <proto_mode> or with an empty name. May return
954 * null if the code improperly registered the default mux to use as a fallback.
Willy Tarreau2386be62017-09-21 19:40:52 +0200955 */
Willy Tarreau5fc311c2018-12-02 13:04:43 +0100956static inline const struct mux_proto_list *conn_get_best_mux_entry(
957 const struct ist mux_proto,
958 int proto_side, int proto_mode)
Willy Tarreau2386be62017-09-21 19:40:52 +0200959{
Christopher Faulet32f61c02018-04-10 14:33:41 +0200960 struct mux_proto_list *item;
Christopher Faulet7ce0c892018-04-10 15:01:45 +0200961 struct mux_proto_list *fallback = NULL;
Willy Tarreau2386be62017-09-21 19:40:52 +0200962
Christopher Faulet32f61c02018-04-10 14:33:41 +0200963 list_for_each_entry(item, &mux_proto_list.list, list) {
Christopher Faulet7ce0c892018-04-10 15:01:45 +0200964 if (!(item->side & proto_side) || !(item->mode & proto_mode))
Willy Tarreau2386be62017-09-21 19:40:52 +0200965 continue;
Christopher Faulet7ce0c892018-04-10 15:01:45 +0200966 if (istlen(mux_proto) && isteq(mux_proto, item->token))
Willy Tarreau5fc311c2018-12-02 13:04:43 +0100967 return item;
Christopher Faulet7ce0c892018-04-10 15:01:45 +0200968 else if (!istlen(item->token)) {
969 if (!fallback || (item->mode == proto_mode && fallback->mode != proto_mode))
970 fallback = item;
971 }
Willy Tarreau2386be62017-09-21 19:40:52 +0200972 }
Willy Tarreau5fc311c2018-12-02 13:04:43 +0100973 return fallback;
974
975}
976
977/* returns the first mux in the list matching the exact same <mux_proto> and
978 * compatible with the <proto_side> (FE or BE) and the <proto_mode> (TCP or
979 * HTTP). <mux_proto> can be empty. Will fall back to the first compatible mux
980 * with exactly the same <proto_mode> or with an empty name. May return
981 * null if the code improperly registered the default mux to use as a fallback.
982 */
983static inline const struct mux_ops *conn_get_best_mux(struct connection *conn,
984 const struct ist mux_proto,
985 int proto_side, int proto_mode)
986{
987 const struct mux_proto_list *item;
988
989 item = conn_get_best_mux_entry(mux_proto, proto_side, proto_mode);
Christopher Faulet7ce0c892018-04-10 15:01:45 +0200990
Willy Tarreau5fc311c2018-12-02 13:04:43 +0100991 return item ? item->mux : NULL;
Willy Tarreau2386be62017-09-21 19:40:52 +0200992}
993
Willy Tarreau57f81852018-09-06 14:52:21 +0200994/* returns 0 if the connection is valid and is a frontend connection, otherwise
995 * returns 1 indicating it's a backend connection. And uninitialized connection
996 * also returns 1 to better handle the usage in the middle of initialization.
997 */
998static inline int conn_is_back(const struct connection *conn)
999{
1000 return !objt_listener(conn->target);
1001}
1002
Willy Tarreau6ac98ac2018-09-06 11:48:44 +02001003/* returns a pointer to the proxy associated with this connection. For a front
1004 * connection it returns a pointer to the frontend ; for a back connection, it
1005 * returns a pointer to the backend.
1006 */
1007static inline struct proxy *conn_get_proxy(const struct connection *conn)
1008{
1009 struct listener *l;
1010 struct server *s;
1011
1012 /* check if it's a frontend connection */
1013 l = objt_listener(conn->target);
1014 if (l)
1015 return l->bind_conf->frontend;
1016
1017 /* check if it's a backend connection */
1018 s = objt_server(conn->target);
1019 if (s)
1020 return s->proxy;
1021
1022 return objt_proxy(conn->target);
1023}
1024
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001025/* installs the best mux for incoming connection <conn> using the upper context
1026 * <ctx>. If the mux protocol is forced, we use it to find the best
1027 * mux. Otherwise we use the ALPN name, if any. Returns < 0 on error.
Willy Tarreau2386be62017-09-21 19:40:52 +02001028 */
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001029static inline int conn_install_mux_fe(struct connection *conn, void *ctx)
Willy Tarreau2386be62017-09-21 19:40:52 +02001030{
Willy Tarreau55e0da62018-09-20 11:26:52 +02001031 struct bind_conf *bind_conf = __objt_listener(conn->target)->bind_conf;
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001032 const struct mux_ops *mux_ops;
Willy Tarreau2386be62017-09-21 19:40:52 +02001033
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001034 if (bind_conf->mux_proto)
1035 mux_ops = bind_conf->mux_proto->mux;
1036 else {
1037 struct ist mux_proto;
1038 const char *alpn_str = NULL;
1039 int alpn_len = 0;
Willy Tarreau68ad3a42018-10-22 11:49:15 +02001040 int mode;
1041
Christopher Fauletc1918d12019-04-24 15:01:22 +02001042 if (bind_conf->frontend->mode == PR_MODE_HTTP)
1043 mode = ((bind_conf->frontend->options2 & PR_O2_USE_HTX) ? PROTO_MODE_HTX : PROTO_MODE_HTTP);
Willy Tarreau68ad3a42018-10-22 11:49:15 +02001044 else
Christopher Fauletc1918d12019-04-24 15:01:22 +02001045 mode = PROTO_MODE_TCP;
Willy Tarreau2386be62017-09-21 19:40:52 +02001046
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001047 conn_get_alpn(conn, &alpn_str, &alpn_len);
1048 mux_proto = ist2(alpn_str, alpn_len);
1049 mux_ops = conn_get_best_mux(conn, mux_proto, PROTO_SIDE_FE, mode);
1050 if (!mux_ops)
1051 return -1;
1052 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01001053 return conn_install_mux(conn, mux_ops, ctx, bind_conf->frontend, conn->owner);
Willy Tarreau2386be62017-09-21 19:40:52 +02001054}
1055
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001056/* installs the best mux for outgoing connection <conn> using the upper context
1057 * <ctx>. If the mux protocol is forced, we use it to find the best mux. Returns
Willy Tarreau2e0b2b52017-09-15 06:59:55 +02001058 * < 0 on error.
Willy Tarreau2386be62017-09-21 19:40:52 +02001059 */
Olivier Houchardf502aca2018-12-14 19:42:40 +01001060static inline int conn_install_mux_be(struct connection *conn, void *ctx, struct session *sess)
Willy Tarreau2386be62017-09-21 19:40:52 +02001061{
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001062 struct server *srv = objt_server(conn->target);
Willy Tarreau287527a2018-08-08 18:40:44 +02001063 struct proxy *prx = objt_proxy(conn->target);
Willy Tarreau2386be62017-09-21 19:40:52 +02001064 const struct mux_ops *mux_ops;
1065
Willy Tarreau287527a2018-08-08 18:40:44 +02001066 if (srv)
1067 prx = srv->proxy;
1068
1069 if (!prx) // target must be either proxy or server
1070 return -1;
1071
1072 if (srv && srv->mux_proto)
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001073 mux_ops = srv->mux_proto->mux;
1074 else {
Olivier Houchard201b9f42018-11-21 00:16:29 +01001075 struct ist mux_proto;
1076 const char *alpn_str = NULL;
1077 int alpn_len = 0;
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001078 int mode;
1079
Christopher Fauletc1918d12019-04-24 15:01:22 +02001080 if (prx->mode == PR_MODE_HTTP)
1081 mode = ((prx->options2 & PR_O2_USE_HTX) ? PROTO_MODE_HTX : PROTO_MODE_HTTP);
Willy Tarreau68ad3a42018-10-22 11:49:15 +02001082 else
Christopher Fauletc1918d12019-04-24 15:01:22 +02001083 mode = PROTO_MODE_TCP;
Willy Tarreau68ad3a42018-10-22 11:49:15 +02001084
Olivier Houchard201b9f42018-11-21 00:16:29 +01001085 conn_get_alpn(conn, &alpn_str, &alpn_len);
1086 mux_proto = ist2(alpn_str, alpn_len);
1087
1088 mux_ops = conn_get_best_mux(conn, mux_proto, PROTO_SIDE_BE, mode);
Christopher Faulet7ce0c892018-04-10 15:01:45 +02001089 if (!mux_ops)
1090 return -1;
1091 }
Olivier Houchardf502aca2018-12-14 19:42:40 +01001092 return conn_install_mux(conn, mux_ops, ctx, prx, sess);
Willy Tarreau2386be62017-09-21 19:40:52 +02001093}
1094
Christopher Fauletc0016d82019-04-08 10:42:41 +02001095static inline int conn_upgrade_mux_fe(struct connection *conn, void *ctx, struct buffer *buf,
1096 struct ist mux_proto, int mode)
1097{
1098 struct bind_conf *bind_conf = __objt_listener(conn->target)->bind_conf;
1099 const struct mux_ops *old_mux, *new_mux;
1100 void *old_mux_ctx;
1101 const char *alpn_str = NULL;
1102 int alpn_len = 0;
1103
1104 if (!mux_proto.len) {
1105 conn_get_alpn(conn, &alpn_str, &alpn_len);
1106 mux_proto = ist2(alpn_str, alpn_len);
1107 }
1108 new_mux = conn_get_best_mux(conn, mux_proto, PROTO_SIDE_FE, mode);
1109 old_mux = conn->mux;
1110
1111 /* No mux found */
1112 if (!new_mux)
1113 return -1;
1114
1115 /* Same mux, nothing to do */
1116 if (old_mux == new_mux)
1117 return 0;
1118
1119 old_mux_ctx = conn->ctx;
1120 conn->mux = new_mux;
1121 conn->ctx = ctx;
1122 conn_force_unsubscribe(conn);
1123 if (new_mux->init(conn, bind_conf->frontend, conn->owner, buf) == -1) {
1124 /* The mux upgrade failed, so restore the old mux */
1125 conn->ctx = old_mux_ctx;
1126 conn->mux = old_mux;
1127 return -1;
1128 }
1129
1130 /* The mux was upgraded, destroy the old one */
1131 *buf = BUF_NULL;
1132 old_mux->destroy(old_mux_ctx);
1133 return 0;
1134}
1135
Willy Tarreau59f98392012-07-06 14:13:49 +02001136#endif /* _PROTO_CONNECTION_H */
1137
1138/*
1139 * Local variables:
1140 * c-indent-level: 8
1141 * c-basic-offset: 8
1142 * End:
1143 */