Mercurial > hg > nginx-quic
annotate src/core/ngx_connection.h @ 8456:c72d8839f427
Mail: fixed SMTP pipelining to send the response immediately.
Previously, if there were some pipelined SMTP data in the buffer when
a proxied connection with the backend was established, nginx called
ngx_mail_proxy_handler() to send these data, and not tried to send the
response to the last command. In most cases, this response was later sent
along with the response to the pipelined command, but if for some reason
client decides to wait for the response before finishing the next command
this might result in a connection hang.
Fix is to always call ngx_mail_proxy_handler() to send the response, and
additionally post an event to send the pipelined data if needed.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Wed, 19 May 2021 03:13:12 +0300 |
parents | fdc3d40979b0 |
children | 7f95010f10b7 ec2e6893caaa |
rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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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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100
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12 #include <ngx_config.h> |
92
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13 #include <ngx_core.h> |
103
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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; | |
103
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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; | |
103
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25 |
543 | 26 int type; |
563 | 27 |
543 | 28 int backlog; |
563 | 29 int rcvbuf; |
30 int sndbuf; | |
4323
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Added the "so_keepalive=" parameter to the "listen" directive.
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31 #if (NGX_HAVE_KEEPALIVE_TUNABLE) |
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Added the "so_keepalive=" parameter to the "listen" directive.
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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 |
103
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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 */ | |
103
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41 |
543 | 42 ngx_log_t log; |
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43 ngx_log_t *logp; |
103
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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 | |
49 ngx_listening_t *previous; | |
50 ngx_connection_t *connection; | |
103
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51 |
7286 | 52 ngx_rbtree_t rbtree; |
53 ngx_rbtree_node_t sentinel; | |
54 | |
6153
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The "reuseport" option of the "listen" directive.
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55 ngx_uint_t worker; |
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56 |
543 | 57 unsigned open:1; |
58 unsigned remain:1; | |
59 unsigned ignore:1; | |
109
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60 |
543 | 61 unsigned bound:1; /* already bound */ |
62 unsigned inherited:1; /* inherited from previous process */ | |
63 unsigned nonblocking_accept:1; | |
563 | 64 unsigned listen:1; |
543 | 65 unsigned nonblocking:1; |
66 unsigned shared:1; /* shared between threads or processes */ | |
67 unsigned addr_ntop:1; | |
6436 | 68 unsigned wildcard:1; |
523 | 69 |
6719
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Modules compatibility: removed unneeded IPV6_V6ONLY checks.
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70 #if (NGX_HAVE_INET6) |
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Core: ipv6only is now on by default.
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71 unsigned ipv6only:1; |
2562 | 72 #endif |
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73 unsigned reuseport:1; |
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74 unsigned add_reuseport:1; |
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75 unsigned keepalive:2; |
2562 | 76 |
543 | 77 unsigned deferred_accept:1; |
78 unsigned delete_deferred:1; | |
79 unsigned add_deferred:1; | |
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80 #if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER) |
543 | 81 char *accept_filter; |
523 | 82 #endif |
3676 | 83 #if (NGX_HAVE_SETFIB) |
84 int setfib; | |
85 #endif | |
419
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86 |
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Added support for TCP_FASTOPEN supported in Linux >= 3.7.1.
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87 #if (NGX_HAVE_TCP_FASTOPEN) |
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88 int fastopen; |
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89 #endif |
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90 |
543 | 91 }; |
92
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92 |
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93 |
256
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94 typedef enum { |
6474 | 95 NGX_ERROR_ALERT = 0, |
96 NGX_ERROR_ERR, | |
97 NGX_ERROR_INFO, | |
98 NGX_ERROR_IGNORE_ECONNRESET, | |
99 NGX_ERROR_IGNORE_EINVAL | |
256
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100 } ngx_connection_log_error_e; |
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101 |
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102 |
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103 typedef enum { |
6474 | 104 NGX_TCP_NODELAY_UNSET = 0, |
105 NGX_TCP_NODELAY_SET, | |
106 NGX_TCP_NODELAY_DISABLED | |
483 | 107 } ngx_connection_tcp_nodelay_e; |
108 | |
109 | |
110 typedef enum { | |
6474 | 111 NGX_TCP_NOPUSH_UNSET = 0, |
112 NGX_TCP_NOPUSH_SET, | |
113 NGX_TCP_NOPUSH_DISABLED | |
344
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114 } ngx_connection_tcp_nopush_e; |
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115 |
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116 |
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117 #define NGX_LOWLEVEL_BUFFERED 0x0f |
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118 #define NGX_SSL_BUFFERED 0x01 |
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The HTTP/2 implementation (RFC 7240, 7241).
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119 #define NGX_HTTP_V2_BUFFERED 0x02 |
597 | 120 |
121 | |
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122 struct ngx_connection_s { |
396
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123 void *data; |
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124 ngx_event_t *read; |
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125 ngx_event_t *write; |
103
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126 |
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127 ngx_socket_t fd; |
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128 |
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129 ngx_recv_pt recv; |
539 | 130 ngx_send_pt send; |
577 | 131 ngx_recv_chain_pt recv_chain; |
396
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132 ngx_send_chain_pt send_chain; |
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133 |
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134 ngx_listening_t *listening; |
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135 |
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136 off_t sent; |
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137 |
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138 ngx_log_t *log; |
57
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139 |
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140 ngx_pool_t *pool; |
103
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141 |
6436 | 142 int type; |
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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Core: moved PROXY protocol fields out of ngx_connection_t.
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148 ngx_proxy_protocol_t *proxy_protocol; |
5605
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Added server-side support for PROXY protocol v1 (ticket #355).
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149 |
6735
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Modules compatibility: compatibility with NGX_HTTP_SSL.
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150 #if (NGX_SSL || NGX_COMPAT) |
547 | 151 ngx_ssl_connection_t *ssl; |
392
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152 #endif |
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153 |
7286 | 154 ngx_udp_connection_t *udp; |
155 | |
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156 struct sockaddr *local_sockaddr; |
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Core: keep the length of the local sockaddr.
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157 socklen_t local_socklen; |
103
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158 |
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159 ngx_buf_t *buffer; |
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160 |
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reuse keepalive connections if there are no free worker connections
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161 ngx_queue_t queue; |
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162 |
495 | 163 ngx_atomic_uint_t number; |
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164 |
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Introduced the "keepalive_time" directive.
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165 ngx_msec_t start_time; |
2888 | 166 ngx_uint_t requests; |
167 | |
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168 unsigned buffered:8; |
597 | 169 |
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170 unsigned log_error:3; /* ngx_connection_log_error_e */ |
256
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171 |
396
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172 unsigned timedout:1; |
583 | 173 unsigned error:1; |
174 unsigned destroyed:1; | |
452 | 175 |
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176 unsigned idle:1; |
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177 unsigned reusable:1; |
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178 unsigned close:1; |
6436 | 179 unsigned shared:1; |
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180 |
452 | 181 unsigned sendfile:1; |
182 unsigned sndlowat:1; | |
483 | 183 unsigned tcp_nodelay:2; /* ngx_connection_tcp_nodelay_e */ |
184 unsigned tcp_nopush:2; /* ngx_connection_tcp_nopush_e */ | |
452 | 185 |
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SPDY: body filter was replaced by c->send_chain() function.
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186 unsigned need_last_buf:1; |
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187 |
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Modules compatibility: compatibility with NGX_HAVE_FILE_AIO.
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188 #if (NGX_HAVE_AIO_SENDFILE || NGX_COMPAT) |
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Allowed up to two EBUSY errors from sendfile().
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189 unsigned busy_count:2; |
3065 | 190 #endif |
191 | |
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Modules compatibility: compatibility with NGX_THREADS.
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192 #if (NGX_THREADS || NGX_COMPAT) |
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Added support for offloading Linux sendfile() in thread pools.
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193 ngx_thread_task_t *sendfile_task; |
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194 #endif |
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195 }; |
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196 |
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197 |
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Core: the ngx_set_connection_log() macro.
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198 #define ngx_set_connection_log(c, l) \ |
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199 \ |
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200 c->log->file = l->file; \ |
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Core: the ngx_set_connection_log() macro.
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201 c->log->next = l->next; \ |
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202 c->log->writer = l->writer; \ |
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203 c->log->wdata = l->wdata; \ |
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204 if (!(c->log->log_level & NGX_LOG_DEBUG_CONNECTION)) { \ |
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205 c->log->log_level = l->log_level; \ |
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206 } |
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207 |
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208 |
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Belatedly changed the ngx_create_listening() prototype.
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209 ngx_listening_t *ngx_create_listening(ngx_conf_t *cf, struct sockaddr *sockaddr, |
2806 | 210 socklen_t socklen); |
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Events: moved sockets cloning to ngx_event_init_conf().
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211 ngx_int_t ngx_clone_listening(ngx_cycle_t *cycle, ngx_listening_t *ls); |
219
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212 ngx_int_t ngx_set_inherited_sockets(ngx_cycle_t *cycle); |
218
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213 ngx_int_t ngx_open_listening_sockets(ngx_cycle_t *cycle); |
2802 | 214 void ngx_configure_listening_sockets(ngx_cycle_t *cycle); |
218
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215 void ngx_close_listening_sockets(ngx_cycle_t *cycle); |
417
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216 void ngx_close_connection(ngx_connection_t *c); |
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Core: idle connections now closed only once on exiting.
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217 void ngx_close_idle_connections(ngx_cycle_t *cycle); |
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ngx_connection_local_sockaddr()
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218 ngx_int_t ngx_connection_local_sockaddr(ngx_connection_t *c, ngx_str_t *s, |
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ngx_connection_local_sockaddr()
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219 ngx_uint_t port); |
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Introduced ngx_tcp_nodelay().
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220 ngx_int_t ngx_tcp_nodelay(ngx_connection_t *c); |
253
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221 ngx_int_t ngx_connection_error(ngx_connection_t *c, ngx_err_t err, char *text); |
218
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222 |
543 | 223 ngx_connection_t *ngx_get_connection(ngx_socket_t s, ngx_log_t *log); |
224 void ngx_free_connection(ngx_connection_t *c); | |
91
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225 |
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226 void ngx_reusable_connection(ngx_connection_t *c, ngx_uint_t reusable); |
91
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227 |
0
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228 #endif /* _NGX_CONNECTION_H_INCLUDED_ */ |