Mercurial > hg > nginx
annotate src/core/ngx_connection.h @ 6153:4f6efabcb09b
The "reuseport" option of the "listen" directive.
When configured, an individual listen socket on a given address is
created for each worker process. This allows to reduce in-kernel lock
contention on configurations with high accept rates, resulting in better
performance. As of now it works on Linux and DragonFly BSD.
Note that on Linux incoming connection requests are currently tied up
to a specific listen socket, and if some sockets are closed, connection
requests will be reset, see https://lwn.net/Articles/542629/. With
nginx, this may happen if the number of worker processes is reduced.
There is no such problem on DragonFly BSD.
Based on previous work by Sepherosa Ziehau and Yingqi Lu.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Wed, 20 May 2015 15:51:56 +0300 |
| parents | 187aa751ad62 |
| children | 5e6142609e48 |
| rev | line source |
|---|---|
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2 /* |
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3 * Copyright (C) Igor Sysoev |
| 4412 | 4 * Copyright (C) Nginx, Inc. |
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5 */ |
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8 #ifndef _NGX_CONNECTION_H_INCLUDED_ |
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9 #define _NGX_CONNECTION_H_INCLUDED_ |
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12 #include <ngx_config.h> |
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13 #include <ngx_core.h> |
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14 |
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15 |
| 543 | 16 typedef struct ngx_listening_s ngx_listening_t; |
| 17 | |
| 18 struct ngx_listening_s { | |
| 19 ngx_socket_t fd; | |
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20 |
| 543 | 21 struct sockaddr *sockaddr; |
| 22 socklen_t socklen; /* size of sockaddr */ | |
| 23 size_t addr_text_max_len; | |
| 24 ngx_str_t addr_text; | |
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25 |
| 543 | 26 int type; |
| 563 | 27 |
| 543 | 28 int backlog; |
| 563 | 29 int rcvbuf; |
| 30 int sndbuf; | |
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31 #if (NGX_HAVE_KEEPALIVE_TUNABLE) |
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32 int keepidle; |
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33 int keepintvl; |
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34 int keepcnt; |
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35 #endif |
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36 |
| 543 | 37 /* handler of accepted connection */ |
| 547 | 38 ngx_connection_handler_pt handler; |
| 543 | 39 |
| 40 void *servers; /* array of ngx_http_in_addr_t, for example */ | |
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41 |
| 543 | 42 ngx_log_t log; |
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43 ngx_log_t *logp; |
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44 |
| 543 | 45 size_t pool_size; |
| 46 /* should be here because of the AcceptEx() preread */ | |
| 47 size_t post_accept_buffer_size; | |
| 48 /* should be here because of the deferred accept */ | |
| 557 | 49 ngx_msec_t post_accept_timeout; |
| 543 | 50 |
| 51 ngx_listening_t *previous; | |
| 52 ngx_connection_t *connection; | |
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53 |
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54 ngx_uint_t worker; |
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55 |
| 543 | 56 unsigned open:1; |
| 57 unsigned remain:1; | |
| 58 unsigned ignore:1; | |
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59 |
| 543 | 60 unsigned bound:1; /* already bound */ |
| 61 unsigned inherited:1; /* inherited from previous process */ | |
| 62 unsigned nonblocking_accept:1; | |
| 563 | 63 unsigned listen:1; |
| 543 | 64 unsigned nonblocking:1; |
| 65 unsigned shared:1; /* shared between threads or processes */ | |
| 66 unsigned addr_ntop:1; | |
| 523 | 67 |
| 2562 | 68 #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY) |
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69 unsigned ipv6only:1; |
| 2562 | 70 #endif |
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71 #if (NGX_HAVE_REUSEPORT) |
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72 unsigned reuseport:1; |
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73 unsigned add_reuseport:1; |
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74 #endif |
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75 unsigned keepalive:2; |
| 2562 | 76 |
| 469 | 77 #if (NGX_HAVE_DEFERRED_ACCEPT) |
| 543 | 78 unsigned deferred_accept:1; |
| 79 unsigned delete_deferred:1; | |
| 80 unsigned add_deferred:1; | |
| 523 | 81 #ifdef SO_ACCEPTFILTER |
| 543 | 82 char *accept_filter; |
| 523 | 83 #endif |
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84 #endif |
| 3676 | 85 #if (NGX_HAVE_SETFIB) |
| 86 int setfib; | |
| 87 #endif | |
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88 |
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89 #if (NGX_HAVE_TCP_FASTOPEN) |
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90 int fastopen; |
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91 #endif |
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92 |
| 543 | 93 }; |
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94 |
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95 |
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96 typedef enum { |
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97 NGX_ERROR_ALERT = 0, |
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98 NGX_ERROR_ERR, |
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99 NGX_ERROR_INFO, |
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100 NGX_ERROR_IGNORE_ECONNRESET, |
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101 NGX_ERROR_IGNORE_EINVAL |
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102 } ngx_connection_log_error_e; |
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103 |
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104 |
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105 typedef enum { |
| 483 | 106 NGX_TCP_NODELAY_UNSET = 0, |
| 107 NGX_TCP_NODELAY_SET, | |
| 108 NGX_TCP_NODELAY_DISABLED | |
| 109 } ngx_connection_tcp_nodelay_e; | |
| 110 | |
| 111 | |
| 112 typedef enum { | |
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113 NGX_TCP_NOPUSH_UNSET = 0, |
| 483 | 114 NGX_TCP_NOPUSH_SET, |
| 115 NGX_TCP_NOPUSH_DISABLED | |
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116 } ngx_connection_tcp_nopush_e; |
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117 |
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118 |
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119 #define NGX_LOWLEVEL_BUFFERED 0x0f |
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120 #define NGX_SSL_BUFFERED 0x01 |
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121 #define NGX_SPDY_BUFFERED 0x02 |
| 597 | 122 |
| 123 | |
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124 struct ngx_connection_s { |
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125 void *data; |
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126 ngx_event_t *read; |
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127 ngx_event_t *write; |
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128 |
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129 ngx_socket_t fd; |
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130 |
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131 ngx_recv_pt recv; |
| 539 | 132 ngx_send_pt send; |
| 577 | 133 ngx_recv_chain_pt recv_chain; |
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134 ngx_send_chain_pt send_chain; |
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135 |
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136 ngx_listening_t *listening; |
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137 |
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138 off_t sent; |
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140 ngx_log_t *log; |
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141 |
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142 ngx_pool_t *pool; |
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143 |
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144 struct sockaddr *sockaddr; |
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145 socklen_t socklen; |
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146 ngx_str_t addr_text; |
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147 |
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148 ngx_str_t proxy_protocol_addr; |
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149 |
| 577 | 150 #if (NGX_SSL) |
| 547 | 151 ngx_ssl_connection_t *ssl; |
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152 #endif |
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153 |
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154 struct sockaddr *local_sockaddr; |
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Core: keep the length of the local sockaddr.
Ruslan Ermilov <ru@nginx.com>
parents:
5456
diff
changeset
|
155 socklen_t local_socklen; |
|
103
6dfda4cf5200
nginx-0.0.1-2003-06-11-19:28:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
101
diff
changeset
|
156 |
|
396
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
393
diff
changeset
|
157 ngx_buf_t *buffer; |
|
8
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
158 |
|
3880
e3cb8e27e413
reuse keepalive connections if there are no free worker connections
Igor Sysoev <igor@sysoev.ru>
parents:
3676
diff
changeset
|
159 ngx_queue_t queue; |
|
e3cb8e27e413
reuse keepalive connections if there are no free worker connections
Igor Sysoev <igor@sysoev.ru>
parents:
3676
diff
changeset
|
160 |
| 495 | 161 ngx_atomic_uint_t number; |
|
26
53cb81681040
nginx-0.0.1-2002-12-15-09:25:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
24
diff
changeset
|
162 |
| 2888 | 163 ngx_uint_t requests; |
| 164 | |
|
829
362d156f0278
high level HTTP buffered flags should be on per-subrequest basis,
Igor Sysoev <igor@sysoev.ru>
parents:
641
diff
changeset
|
165 unsigned buffered:8; |
| 597 | 166 |
|
2560
a7443674e429
ignore EINVAL from setsockopt() on Solaris
Igor Sysoev <igor@sysoev.ru>
parents:
2512
diff
changeset
|
167 unsigned log_error:3; /* ngx_connection_log_error_e */ |
|
256
8e39cab6abd5
nginx-0.0.2-2004-02-10-19:23:38 import
Igor Sysoev <igor@sysoev.ru>
parents:
253
diff
changeset
|
168 |
|
396
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
393
diff
changeset
|
169 unsigned unexpected_eof:1; |
|
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
393
diff
changeset
|
170 unsigned timedout:1; |
| 583 | 171 unsigned error:1; |
| 172 unsigned destroyed:1; | |
| 452 | 173 |
|
1135
03f1133f24e8
close keep-alive connections in the shuting down processes
Igor Sysoev <igor@sysoev.ru>
parents:
829
diff
changeset
|
174 unsigned idle:1; |
|
3880
e3cb8e27e413
reuse keepalive connections if there are no free worker connections
Igor Sysoev <igor@sysoev.ru>
parents:
3676
diff
changeset
|
175 unsigned reusable:1; |
|
1135
03f1133f24e8
close keep-alive connections in the shuting down processes
Igor Sysoev <igor@sysoev.ru>
parents:
829
diff
changeset
|
176 unsigned close:1; |
|
03f1133f24e8
close keep-alive connections in the shuting down processes
Igor Sysoev <igor@sysoev.ru>
parents:
829
diff
changeset
|
177 |
| 452 | 178 unsigned sendfile:1; |
| 179 unsigned sndlowat:1; | |
| 483 | 180 unsigned tcp_nodelay:2; /* ngx_connection_tcp_nodelay_e */ |
| 181 unsigned tcp_nopush:2; /* ngx_connection_tcp_nopush_e */ | |
| 452 | 182 |
|
5513
311803b21504
SPDY: body filter was replaced by c->send_chain() function.
Valentin Bartenev <vbart@nginx.com>
parents:
5498
diff
changeset
|
183 unsigned need_last_buf:1; |
|
311803b21504
SPDY: body filter was replaced by c->send_chain() function.
Valentin Bartenev <vbart@nginx.com>
parents:
5498
diff
changeset
|
184 |
| 469 | 185 #if (NGX_HAVE_IOCP) |
|
396
6f3b20c1ac50
nginx-0.0.7-2004-07-18-23:11:20 import
Igor Sysoev <igor@sysoev.ru>
parents:
393
diff
changeset
|
186 unsigned accept_context_updated:1; |
|
103
6dfda4cf5200
nginx-0.0.1-2003-06-11-19:28:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
101
diff
changeset
|
187 #endif |
|
370
54f76b0b8dca
nginx-0.0.7-2004-06-27-22:01:57 import
Igor Sysoev <igor@sysoev.ru>
parents:
356
diff
changeset
|
188 |
| 3065 | 189 #if (NGX_HAVE_AIO_SENDFILE) |
|
5498
d39a69427056
Allowed up to two EBUSY errors from sendfile().
Maxim Dounin <mdounin@mdounin.ru>
parents:
5463
diff
changeset
|
190 unsigned busy_count:2; |
| 3065 | 191 #endif |
| 192 | |
|
6023
b550563ef96e
Added support for offloading Linux sendfile() in thread pools.
Valentin Bartenev <vbart@nginx.com>
parents:
6016
diff
changeset
|
193 #if (NGX_THREADS) |
|
b550563ef96e
Added support for offloading Linux sendfile() in thread pools.
Valentin Bartenev <vbart@nginx.com>
parents:
6016
diff
changeset
|
194 ngx_thread_task_t *sendfile_task; |
|
b550563ef96e
Added support for offloading Linux sendfile() in thread pools.
Valentin Bartenev <vbart@nginx.com>
parents:
6016
diff
changeset
|
195 #endif |
|
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
196 }; |
|
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
197 |
|
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
198 |
|
6129
187aa751ad62
Core: the ngx_set_connection_log() macro.
Vladimir Homutov <vl@nginx.com>
parents:
6031
diff
changeset
|
199 #define ngx_set_connection_log(c, l) \ |
|
187aa751ad62
Core: the ngx_set_connection_log() macro.
Vladimir Homutov <vl@nginx.com>
parents:
6031
diff
changeset
|
200 \ |
|
187aa751ad62
Core: the ngx_set_connection_log() macro.
Vladimir Homutov <vl@nginx.com>
parents:
6031
diff
changeset
|
201 c->log->file = l->file; \ |
|
187aa751ad62
Core: the ngx_set_connection_log() macro.
Vladimir Homutov <vl@nginx.com>
parents:
6031
diff
changeset
|
202 c->log->next = l->next; \ |
|
187aa751ad62
Core: the ngx_set_connection_log() macro.
Vladimir Homutov <vl@nginx.com>
parents:
6031
diff
changeset
|
203 c->log->writer = l->writer; \ |
|
187aa751ad62
Core: the ngx_set_connection_log() macro.
Vladimir Homutov <vl@nginx.com>
parents:
6031
diff
changeset
|
204 c->log->wdata = l->wdata; \ |
|
187aa751ad62
Core: the ngx_set_connection_log() macro.
Vladimir Homutov <vl@nginx.com>
parents:
6031
diff
changeset
|
205 if (!(c->log->log_level & NGX_LOG_DEBUG_CONNECTION)) { \ |
|
187aa751ad62
Core: the ngx_set_connection_log() macro.
Vladimir Homutov <vl@nginx.com>
parents:
6031
diff
changeset
|
206 c->log->log_level = l->log_level; \ |
|
187aa751ad62
Core: the ngx_set_connection_log() macro.
Vladimir Homutov <vl@nginx.com>
parents:
6031
diff
changeset
|
207 } |
|
187aa751ad62
Core: the ngx_set_connection_log() macro.
Vladimir Homutov <vl@nginx.com>
parents:
6031
diff
changeset
|
208 |
|
187aa751ad62
Core: the ngx_set_connection_log() macro.
Vladimir Homutov <vl@nginx.com>
parents:
6031
diff
changeset
|
209 |
| 2806 | 210 ngx_listening_t *ngx_create_listening(ngx_conf_t *cf, void *sockaddr, |
| 211 socklen_t socklen); | |
|
6153
4f6efabcb09b
The "reuseport" option of the "listen" directive.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6129
diff
changeset
|
212 ngx_int_t ngx_clone_listening(ngx_conf_t *cf, ngx_listening_t *ls); |
|
219
f57597ec5249
nginx-0.0.1-2004-01-06-19:49:34 import
Igor Sysoev <igor@sysoev.ru>
parents:
218
diff
changeset
|
213 ngx_int_t ngx_set_inherited_sockets(ngx_cycle_t *cycle); |
|
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
216
diff
changeset
|
214 ngx_int_t ngx_open_listening_sockets(ngx_cycle_t *cycle); |
| 2802 | 215 void ngx_configure_listening_sockets(ngx_cycle_t *cycle); |
|
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
216
diff
changeset
|
216 void ngx_close_listening_sockets(ngx_cycle_t *cycle); |
|
417
0526206251f6
nginx-0.0.10-2004-09-07-19:29:22 import
Igor Sysoev <igor@sysoev.ru>
parents:
399
diff
changeset
|
217 void ngx_close_connection(ngx_connection_t *c); |
|
2854
d788477f5a67
ngx_connection_local_sockaddr()
Igor Sysoev <igor@sysoev.ru>
parents:
2806
diff
changeset
|
218 ngx_int_t ngx_connection_local_sockaddr(ngx_connection_t *c, ngx_str_t *s, |
|
d788477f5a67
ngx_connection_local_sockaddr()
Igor Sysoev <igor@sysoev.ru>
parents:
2806
diff
changeset
|
219 ngx_uint_t port); |
|
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
219
diff
changeset
|
220 ngx_int_t ngx_connection_error(ngx_connection_t *c, ngx_err_t err, char *text); |
|
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
216
diff
changeset
|
221 |
| 543 | 222 ngx_connection_t *ngx_get_connection(ngx_socket_t s, ngx_log_t *log); |
| 223 void ngx_free_connection(ngx_connection_t *c); | |
|
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
87
diff
changeset
|
224 |
|
3880
e3cb8e27e413
reuse keepalive connections if there are no free worker connections
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parents:
3676
diff
changeset
|
225 void ngx_reusable_connection(ngx_connection_t *c, ngx_uint_t reusable); |
|
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
87
diff
changeset
|
226 |
|
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
227 #endif /* _NGX_CONNECTION_H_INCLUDED_ */ |