Mercurial > hg > nginx
annotate src/stream/ngx_stream_handler.c @ 6197:0dcef374b8bb
Stream: connection limiting module.
stream {
limit_conn_zone $binary_remote_addr zone=perip:1m;
limit_conn_log_level error;
server {
...
limit_conn perip 1;
}
}
| author | Vladimir Homutov <vl@nginx.com> |
|---|---|
| date | Thu, 18 Jun 2015 14:17:30 +0300 |
| parents | 8807a2369b1a |
| children | 7565e056fad6 |
| rev | line source |
|---|---|
| 6115 | 1 |
| 2 /* | |
| 3 * Copyright (C) Roman Arutyunyan | |
| 4 * Copyright (C) Nginx, Inc. | |
| 5 */ | |
| 6 | |
| 7 | |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
| 10 #include <ngx_event.h> | |
| 11 #include <ngx_stream.h> | |
| 12 | |
| 13 | |
| 14 static u_char *ngx_stream_log_error(ngx_log_t *log, u_char *buf, size_t len); | |
| 15 static void ngx_stream_init_session(ngx_connection_t *c); | |
| 16 | |
| 17 #if (NGX_STREAM_SSL) | |
| 18 static void ngx_stream_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c); | |
| 19 static void ngx_stream_ssl_handshake_handler(ngx_connection_t *c); | |
| 20 #endif | |
| 21 | |
| 22 | |
| 23 void | |
| 24 ngx_stream_init_connection(ngx_connection_t *c) | |
| 25 { | |
| 6175 | 26 u_char text[NGX_SOCKADDR_STRLEN]; |
| 27 size_t len; | |
| 28 ngx_int_t rc; | |
| 29 ngx_uint_t i; | |
| 30 struct sockaddr *sa; | |
| 31 ngx_stream_port_t *port; | |
| 32 struct sockaddr_in *sin; | |
| 33 ngx_stream_in_addr_t *addr; | |
| 34 ngx_stream_session_t *s; | |
| 35 ngx_stream_addr_conf_t *addr_conf; | |
| 6115 | 36 #if (NGX_HAVE_INET6) |
| 6175 | 37 struct sockaddr_in6 *sin6; |
| 38 ngx_stream_in6_addr_t *addr6; | |
| 6115 | 39 #endif |
| 6175 | 40 ngx_stream_core_srv_conf_t *cscf; |
| 41 ngx_stream_core_main_conf_t *cmcf; | |
| 6115 | 42 |
| 43 /* find the server configuration for the address:port */ | |
| 44 | |
| 45 port = c->listening->servers; | |
| 46 | |
| 47 if (port->naddrs > 1) { | |
| 48 | |
| 49 /* | |
| 50 * There are several addresses on this port and one of them | |
| 51 * is the "*:port" wildcard so getsockname() is needed to determine | |
| 52 * the server address. | |
| 53 * | |
| 54 * AcceptEx() already gave this address. | |
| 55 */ | |
| 56 | |
| 57 if (ngx_connection_local_sockaddr(c, NULL, 0) != NGX_OK) { | |
| 58 ngx_stream_close_connection(c); | |
| 59 return; | |
| 60 } | |
| 61 | |
| 62 sa = c->local_sockaddr; | |
| 63 | |
| 64 switch (sa->sa_family) { | |
| 65 | |
| 66 #if (NGX_HAVE_INET6) | |
| 67 case AF_INET6: | |
| 68 sin6 = (struct sockaddr_in6 *) sa; | |
| 69 | |
| 70 addr6 = port->addrs; | |
| 71 | |
| 72 /* the last address is "*" */ | |
| 73 | |
| 74 for (i = 0; i < port->naddrs - 1; i++) { | |
| 75 if (ngx_memcmp(&addr6[i].addr6, &sin6->sin6_addr, 16) == 0) { | |
| 76 break; | |
| 77 } | |
| 78 } | |
| 79 | |
| 80 addr_conf = &addr6[i].conf; | |
| 81 | |
| 82 break; | |
| 83 #endif | |
| 84 | |
| 85 default: /* AF_INET */ | |
| 86 sin = (struct sockaddr_in *) sa; | |
| 87 | |
| 88 addr = port->addrs; | |
| 89 | |
| 90 /* the last address is "*" */ | |
| 91 | |
| 92 for (i = 0; i < port->naddrs - 1; i++) { | |
| 93 if (addr[i].addr == sin->sin_addr.s_addr) { | |
| 94 break; | |
| 95 } | |
| 96 } | |
| 97 | |
| 98 addr_conf = &addr[i].conf; | |
| 99 | |
| 100 break; | |
| 101 } | |
| 102 | |
| 103 } else { | |
| 104 switch (c->local_sockaddr->sa_family) { | |
| 105 | |
| 106 #if (NGX_HAVE_INET6) | |
| 107 case AF_INET6: | |
| 108 addr6 = port->addrs; | |
| 109 addr_conf = &addr6[0].conf; | |
| 110 break; | |
| 111 #endif | |
| 112 | |
| 113 default: /* AF_INET */ | |
| 114 addr = port->addrs; | |
| 115 addr_conf = &addr[0].conf; | |
| 116 break; | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 s = ngx_pcalloc(c->pool, sizeof(ngx_stream_session_t)); | |
| 121 if (s == NULL) { | |
| 122 ngx_stream_close_connection(c); | |
| 123 return; | |
| 124 } | |
| 125 | |
| 126 s->signature = NGX_STREAM_MODULE; | |
| 127 s->main_conf = addr_conf->ctx->main_conf; | |
| 128 s->srv_conf = addr_conf->ctx->srv_conf; | |
| 129 | |
| 130 s->connection = c; | |
| 131 c->data = s; | |
| 132 | |
| 133 cscf = ngx_stream_get_module_srv_conf(s, ngx_stream_core_module); | |
| 134 | |
|
6129
187aa751ad62
Core: the ngx_set_connection_log() macro.
Vladimir Homutov <vl@nginx.com>
parents:
6115
diff
changeset
|
135 ngx_set_connection_log(c, cscf->error_log); |
| 6115 | 136 |
| 137 len = ngx_sock_ntop(c->sockaddr, c->socklen, text, NGX_SOCKADDR_STRLEN, 1); | |
| 138 | |
| 139 ngx_log_error(NGX_LOG_INFO, c->log, 0, "*%uA client %*s connected to %V", | |
| 140 c->number, len, text, &addr_conf->addr_text); | |
| 141 | |
| 142 c->log->connection = c->number; | |
| 143 c->log->handler = ngx_stream_log_error; | |
| 144 c->log->data = s; | |
| 145 c->log->action = "initializing connection"; | |
| 146 c->log_error = NGX_ERROR_INFO; | |
| 147 | |
| 6175 | 148 cmcf = ngx_stream_get_module_main_conf(s, ngx_stream_core_module); |
| 149 | |
|
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Stream: connection limiting module.
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parents:
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diff
changeset
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150 if (cmcf->limit_conn_handler) { |
|
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Stream: connection limiting module.
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parents:
6175
diff
changeset
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151 rc = cmcf->limit_conn_handler(s); |
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parents:
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152 |
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153 if (rc != NGX_DECLINED) { |
|
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
6175
diff
changeset
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154 ngx_stream_close_connection(c); |
|
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Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
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155 return; |
|
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Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
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156 } |
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0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
6175
diff
changeset
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157 } |
|
0dcef374b8bb
Stream: connection limiting module.
Vladimir Homutov <vl@nginx.com>
parents:
6175
diff
changeset
|
158 |
| 6175 | 159 if (cmcf->access_handler) { |
| 160 rc = cmcf->access_handler(s); | |
| 161 | |
| 162 if (rc != NGX_OK && rc != NGX_DECLINED) { | |
| 163 ngx_stream_close_connection(c); | |
| 164 return; | |
| 165 } | |
| 166 } | |
| 167 | |
| 6115 | 168 #if (NGX_STREAM_SSL) |
| 169 { | |
| 170 ngx_stream_ssl_conf_t *sslcf; | |
| 171 | |
| 172 sslcf = ngx_stream_get_module_srv_conf(s, ngx_stream_ssl_module); | |
| 173 | |
| 174 if (addr_conf->ssl) { | |
| 175 c->log->action = "SSL handshaking"; | |
| 176 | |
| 177 if (sslcf->ssl.ctx == NULL) { | |
| 178 ngx_log_error(NGX_LOG_ERR, c->log, 0, | |
| 179 "no \"ssl_certificate\" is defined " | |
| 180 "in server listening on SSL port"); | |
| 181 ngx_stream_close_connection(c); | |
| 182 return; | |
| 183 } | |
| 184 | |
| 185 ngx_stream_ssl_init_connection(&sslcf->ssl, c); | |
| 186 return; | |
| 187 } | |
| 188 } | |
| 189 #endif | |
| 190 | |
| 191 ngx_stream_init_session(c); | |
| 192 } | |
| 193 | |
| 194 | |
| 195 static void | |
| 196 ngx_stream_init_session(ngx_connection_t *c) | |
| 197 { | |
| 198 ngx_stream_session_t *s; | |
| 199 ngx_stream_core_srv_conf_t *cscf; | |
| 200 | |
| 201 s = c->data; | |
| 202 c->log->action = "handling client connection"; | |
| 203 | |
| 204 cscf = ngx_stream_get_module_srv_conf(s, ngx_stream_core_module); | |
| 205 | |
| 206 s->ctx = ngx_pcalloc(c->pool, sizeof(void *) * ngx_stream_max_module); | |
| 207 if (s->ctx == NULL) { | |
| 208 ngx_stream_close_connection(c); | |
| 209 return; | |
| 210 } | |
| 211 | |
| 212 cscf->handler(s); | |
| 213 } | |
| 214 | |
| 215 | |
| 216 #if (NGX_STREAM_SSL) | |
| 217 | |
| 218 static void | |
| 219 ngx_stream_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c) | |
| 220 { | |
| 221 ngx_stream_session_t *s; | |
| 222 ngx_stream_ssl_conf_t *sslcf; | |
| 223 | |
| 224 if (ngx_ssl_create_connection(ssl, c, 0) == NGX_ERROR) { | |
| 225 ngx_stream_close_connection(c); | |
| 226 return; | |
| 227 } | |
| 228 | |
| 229 if (ngx_ssl_handshake(c) == NGX_AGAIN) { | |
| 230 | |
| 231 s = c->data; | |
| 232 | |
| 233 sslcf = ngx_stream_get_module_srv_conf(s, ngx_stream_ssl_module); | |
| 234 | |
| 235 ngx_add_timer(c->read, sslcf->handshake_timeout); | |
| 236 | |
| 237 c->ssl->handler = ngx_stream_ssl_handshake_handler; | |
| 238 | |
| 239 return; | |
| 240 } | |
| 241 | |
| 242 ngx_stream_ssl_handshake_handler(c); | |
| 243 } | |
| 244 | |
| 245 | |
| 246 static void | |
| 247 ngx_stream_ssl_handshake_handler(ngx_connection_t *c) | |
| 248 { | |
| 249 if (!c->ssl->handshaked) { | |
| 250 ngx_stream_close_connection(c); | |
| 251 return; | |
| 252 } | |
| 253 | |
| 254 if (c->read->timer_set) { | |
| 255 ngx_del_timer(c->read); | |
| 256 } | |
| 257 | |
| 258 ngx_stream_init_session(c); | |
| 259 } | |
| 260 | |
| 261 #endif | |
| 262 | |
| 263 | |
| 264 void | |
| 265 ngx_stream_close_connection(ngx_connection_t *c) | |
| 266 { | |
| 267 ngx_pool_t *pool; | |
| 268 | |
| 269 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0, | |
| 270 "close stream connection: %d", c->fd); | |
| 271 | |
| 272 #if (NGX_STREAM_SSL) | |
| 273 | |
| 274 if (c->ssl) { | |
| 275 if (ngx_ssl_shutdown(c) == NGX_AGAIN) { | |
| 276 c->ssl->handler = ngx_stream_close_connection; | |
| 277 return; | |
| 278 } | |
| 279 } | |
| 280 | |
| 281 #endif | |
| 282 | |
| 283 #if (NGX_STAT_STUB) | |
| 284 (void) ngx_atomic_fetch_add(ngx_stat_active, -1); | |
| 285 #endif | |
| 286 | |
| 287 pool = c->pool; | |
| 288 | |
| 289 ngx_close_connection(c); | |
| 290 | |
| 291 ngx_destroy_pool(pool); | |
| 292 } | |
| 293 | |
| 294 | |
| 295 static u_char * | |
| 296 ngx_stream_log_error(ngx_log_t *log, u_char *buf, size_t len) | |
| 297 { | |
| 298 u_char *p; | |
| 299 ngx_stream_session_t *s; | |
| 300 | |
| 301 if (log->action) { | |
| 302 p = ngx_snprintf(buf, len, " while %s", log->action); | |
| 303 len -= p - buf; | |
| 304 buf = p; | |
| 305 } | |
| 306 | |
| 307 s = log->data; | |
| 308 | |
| 309 p = ngx_snprintf(buf, len, ", client: %V, server: %V", | |
| 310 &s->connection->addr_text, | |
| 311 &s->connection->listening->addr_text); | |
| 312 | |
| 313 if (s->log_handler) { | |
| 314 return s->log_handler(log, p, len); | |
| 315 } | |
| 316 | |
| 317 return p; | |
| 318 } |