Mercurial > hg > nginx
annotate src/stream/ngx_stream_handler.c @ 6674:38143d1abdec
Stream: the $status variable.
The stream session status is one of the following:
200 - normal completion
403 - access forbidden
500 - internal server error
502 - bad gateway
503 - limit conn
| author | Roman Arutyunyan <arut@nginx.com> |
|---|---|
| date | Thu, 11 Aug 2016 20:22:23 +0300 |
| parents | 164a0824ce20 |
| children | 0125b151c9a5 |
| 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 | |
|
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14 static void ngx_stream_close_connection(ngx_connection_t *c); |
| 6115 | 15 static u_char *ngx_stream_log_error(ngx_log_t *log, u_char *buf, size_t len); |
| 16 static void ngx_stream_init_session(ngx_connection_t *c); | |
| 17 | |
| 18 #if (NGX_STREAM_SSL) | |
| 19 static void ngx_stream_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c); | |
| 20 static void ngx_stream_ssl_handshake_handler(ngx_connection_t *c); | |
| 21 #endif | |
| 22 | |
| 23 | |
| 24 void | |
| 25 ngx_stream_init_connection(ngx_connection_t *c) | |
| 26 { | |
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27 int tcp_nodelay; |
| 6175 | 28 u_char text[NGX_SOCKADDR_STRLEN]; |
| 29 size_t len; | |
| 30 ngx_int_t rc; | |
| 31 ngx_uint_t i; | |
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32 ngx_time_t *tp; |
| 6175 | 33 struct sockaddr *sa; |
| 34 ngx_stream_port_t *port; | |
| 35 struct sockaddr_in *sin; | |
| 36 ngx_stream_in_addr_t *addr; | |
| 37 ngx_stream_session_t *s; | |
| 38 ngx_stream_addr_conf_t *addr_conf; | |
| 6115 | 39 #if (NGX_HAVE_INET6) |
| 6175 | 40 struct sockaddr_in6 *sin6; |
| 41 ngx_stream_in6_addr_t *addr6; | |
| 6115 | 42 #endif |
| 6175 | 43 ngx_stream_core_srv_conf_t *cscf; |
| 44 ngx_stream_core_main_conf_t *cmcf; | |
| 6115 | 45 |
| 46 /* find the server configuration for the address:port */ | |
| 47 | |
| 48 port = c->listening->servers; | |
| 49 | |
| 50 if (port->naddrs > 1) { | |
| 51 | |
| 52 /* | |
| 53 * There are several addresses on this port and one of them | |
| 54 * is the "*:port" wildcard so getsockname() is needed to determine | |
| 55 * the server address. | |
| 56 * | |
| 6436 | 57 * AcceptEx() and recvmsg() already gave this address. |
| 6115 | 58 */ |
| 59 | |
| 60 if (ngx_connection_local_sockaddr(c, NULL, 0) != NGX_OK) { | |
| 61 ngx_stream_close_connection(c); | |
| 62 return; | |
| 63 } | |
| 64 | |
| 65 sa = c->local_sockaddr; | |
| 66 | |
| 67 switch (sa->sa_family) { | |
| 68 | |
| 69 #if (NGX_HAVE_INET6) | |
| 70 case AF_INET6: | |
| 71 sin6 = (struct sockaddr_in6 *) sa; | |
| 72 | |
| 73 addr6 = port->addrs; | |
| 74 | |
| 75 /* the last address is "*" */ | |
| 76 | |
| 77 for (i = 0; i < port->naddrs - 1; i++) { | |
| 78 if (ngx_memcmp(&addr6[i].addr6, &sin6->sin6_addr, 16) == 0) { | |
| 79 break; | |
| 80 } | |
| 81 } | |
| 82 | |
| 83 addr_conf = &addr6[i].conf; | |
| 84 | |
| 85 break; | |
| 86 #endif | |
| 87 | |
| 88 default: /* AF_INET */ | |
| 89 sin = (struct sockaddr_in *) sa; | |
| 90 | |
| 91 addr = port->addrs; | |
| 92 | |
| 93 /* the last address is "*" */ | |
| 94 | |
| 95 for (i = 0; i < port->naddrs - 1; i++) { | |
| 96 if (addr[i].addr == sin->sin_addr.s_addr) { | |
| 97 break; | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 addr_conf = &addr[i].conf; | |
| 102 | |
| 103 break; | |
| 104 } | |
| 105 | |
| 106 } else { | |
| 107 switch (c->local_sockaddr->sa_family) { | |
| 108 | |
| 109 #if (NGX_HAVE_INET6) | |
| 110 case AF_INET6: | |
| 111 addr6 = port->addrs; | |
| 112 addr_conf = &addr6[0].conf; | |
| 113 break; | |
| 114 #endif | |
| 115 | |
| 116 default: /* AF_INET */ | |
| 117 addr = port->addrs; | |
| 118 addr_conf = &addr[0].conf; | |
| 119 break; | |
| 120 } | |
| 121 } | |
| 122 | |
| 123 s = ngx_pcalloc(c->pool, sizeof(ngx_stream_session_t)); | |
| 124 if (s == NULL) { | |
| 125 ngx_stream_close_connection(c); | |
| 126 return; | |
| 127 } | |
| 128 | |
| 129 s->signature = NGX_STREAM_MODULE; | |
| 130 s->main_conf = addr_conf->ctx->main_conf; | |
| 131 s->srv_conf = addr_conf->ctx->srv_conf; | |
| 132 | |
| 133 s->connection = c; | |
| 134 c->data = s; | |
| 135 | |
| 136 cscf = ngx_stream_get_module_srv_conf(s, ngx_stream_core_module); | |
| 137 | |
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138 ngx_set_connection_log(c, cscf->error_log); |
| 6115 | 139 |
| 140 len = ngx_sock_ntop(c->sockaddr, c->socklen, text, NGX_SOCKADDR_STRLEN, 1); | |
| 141 | |
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142 ngx_log_error(NGX_LOG_INFO, c->log, 0, "*%uA %sclient %*s connected to %V", |
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143 c->number, c->type == SOCK_DGRAM ? "udp " : "", |
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144 len, text, &addr_conf->addr_text); |
| 6115 | 145 |
| 146 c->log->connection = c->number; | |
| 147 c->log->handler = ngx_stream_log_error; | |
| 148 c->log->data = s; | |
| 149 c->log->action = "initializing connection"; | |
| 150 c->log_error = NGX_ERROR_INFO; | |
| 151 | |
| 6175 | 152 cmcf = ngx_stream_get_module_main_conf(s, ngx_stream_core_module); |
| 153 | |
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154 s->variables = ngx_pcalloc(s->connection->pool, |
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155 cmcf->variables.nelts |
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156 * sizeof(ngx_stream_variable_value_t)); |
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157 |
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158 if (s->variables == NULL) { |
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159 ngx_stream_close_connection(c); |
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160 return; |
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161 } |
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162 |
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163 tp = ngx_timeofday(); |
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164 s->start_sec = tp->sec; |
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165 s->start_msec = tp->msec; |
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166 |
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167 if (cmcf->limit_conn_handler) { |
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168 rc = cmcf->limit_conn_handler(s); |
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169 |
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170 if (rc == NGX_ERROR) { |
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171 ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR); |
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172 return; |
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173 } |
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174 |
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175 if (rc == NGX_ABORT) { |
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176 ngx_stream_finalize_session(s, NGX_STREAM_SERVICE_UNAVAILABLE); |
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177 return; |
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178 } |
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179 } |
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180 |
| 6175 | 181 if (cmcf->access_handler) { |
| 182 rc = cmcf->access_handler(s); | |
| 183 | |
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184 if (rc == NGX_ERROR) { |
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185 ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR); |
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186 return; |
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187 } |
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188 |
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189 if (rc == NGX_ABORT) { |
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190 ngx_stream_finalize_session(s, NGX_STREAM_FORBIDDEN); |
| 6175 | 191 return; |
| 192 } | |
| 193 } | |
| 194 | |
| 6436 | 195 if (c->type == SOCK_STREAM |
| 196 && cscf->tcp_nodelay | |
| 197 && c->tcp_nodelay == NGX_TCP_NODELAY_UNSET) | |
| 198 { | |
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199 ngx_log_debug0(NGX_LOG_DEBUG_STREAM, c->log, 0, "tcp_nodelay"); |
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200 |
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201 tcp_nodelay = 1; |
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202 |
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203 if (setsockopt(c->fd, IPPROTO_TCP, TCP_NODELAY, |
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204 (const void *) &tcp_nodelay, sizeof(int)) == -1) |
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205 { |
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206 ngx_connection_error(c, ngx_socket_errno, |
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207 "setsockopt(TCP_NODELAY) failed"); |
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208 ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR); |
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209 return; |
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210 } |
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211 |
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212 c->tcp_nodelay = NGX_TCP_NODELAY_SET; |
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213 } |
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214 |
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215 |
| 6115 | 216 #if (NGX_STREAM_SSL) |
| 217 { | |
| 218 ngx_stream_ssl_conf_t *sslcf; | |
| 219 | |
| 220 sslcf = ngx_stream_get_module_srv_conf(s, ngx_stream_ssl_module); | |
| 221 | |
| 222 if (addr_conf->ssl) { | |
| 223 c->log->action = "SSL handshaking"; | |
| 224 | |
| 225 if (sslcf->ssl.ctx == NULL) { | |
| 226 ngx_log_error(NGX_LOG_ERR, c->log, 0, | |
| 227 "no \"ssl_certificate\" is defined " | |
| 228 "in server listening on SSL port"); | |
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229 ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR); |
| 6115 | 230 return; |
| 231 } | |
| 232 | |
| 233 ngx_stream_ssl_init_connection(&sslcf->ssl, c); | |
| 234 return; | |
| 235 } | |
| 236 } | |
| 237 #endif | |
| 238 | |
| 239 ngx_stream_init_session(c); | |
| 240 } | |
| 241 | |
| 242 | |
| 243 static void | |
| 244 ngx_stream_init_session(ngx_connection_t *c) | |
| 245 { | |
| 246 ngx_stream_session_t *s; | |
| 247 ngx_stream_core_srv_conf_t *cscf; | |
| 248 | |
| 249 s = c->data; | |
| 250 c->log->action = "handling client connection"; | |
| 251 | |
| 252 cscf = ngx_stream_get_module_srv_conf(s, ngx_stream_core_module); | |
| 253 | |
| 254 s->ctx = ngx_pcalloc(c->pool, sizeof(void *) * ngx_stream_max_module); | |
| 255 if (s->ctx == NULL) { | |
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256 ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR); |
| 6115 | 257 return; |
| 258 } | |
| 259 | |
| 260 cscf->handler(s); | |
| 261 } | |
| 262 | |
| 263 | |
| 264 #if (NGX_STREAM_SSL) | |
| 265 | |
| 266 static void | |
| 267 ngx_stream_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c) | |
| 268 { | |
| 269 ngx_stream_session_t *s; | |
| 270 ngx_stream_ssl_conf_t *sslcf; | |
| 271 | |
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272 s = c->data; |
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273 |
| 6115 | 274 if (ngx_ssl_create_connection(ssl, c, 0) == NGX_ERROR) { |
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275 ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR); |
| 6115 | 276 return; |
| 277 } | |
| 278 | |
| 279 if (ngx_ssl_handshake(c) == NGX_AGAIN) { | |
| 280 sslcf = ngx_stream_get_module_srv_conf(s, ngx_stream_ssl_module); | |
| 281 | |
| 282 ngx_add_timer(c->read, sslcf->handshake_timeout); | |
| 283 | |
| 284 c->ssl->handler = ngx_stream_ssl_handshake_handler; | |
| 285 | |
| 286 return; | |
| 287 } | |
| 288 | |
| 289 ngx_stream_ssl_handshake_handler(c); | |
| 290 } | |
| 291 | |
| 292 | |
| 293 static void | |
| 294 ngx_stream_ssl_handshake_handler(ngx_connection_t *c) | |
| 295 { | |
| 296 if (!c->ssl->handshaked) { | |
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297 ngx_stream_finalize_session(c->data, NGX_STREAM_INTERNAL_SERVER_ERROR); |
| 6115 | 298 return; |
| 299 } | |
| 300 | |
| 301 if (c->read->timer_set) { | |
| 302 ngx_del_timer(c->read); | |
| 303 } | |
| 304 | |
| 305 ngx_stream_init_session(c); | |
| 306 } | |
| 307 | |
| 308 #endif | |
| 309 | |
| 310 | |
| 311 void | |
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312 ngx_stream_finalize_session(ngx_stream_session_t *s, ngx_uint_t rc) |
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313 { |
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314 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, |
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315 "finalize stream session: %i", rc); |
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316 |
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317 s->status = rc; |
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318 |
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319 ngx_stream_close_connection(s->connection); |
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320 } |
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321 |
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322 |
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323 static void |
| 6115 | 324 ngx_stream_close_connection(ngx_connection_t *c) |
| 325 { | |
| 326 ngx_pool_t *pool; | |
| 327 | |
| 328 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0, | |
| 329 "close stream connection: %d", c->fd); | |
| 330 | |
| 331 #if (NGX_STREAM_SSL) | |
| 332 | |
| 333 if (c->ssl) { | |
| 334 if (ngx_ssl_shutdown(c) == NGX_AGAIN) { | |
| 335 c->ssl->handler = ngx_stream_close_connection; | |
| 336 return; | |
| 337 } | |
| 338 } | |
| 339 | |
| 340 #endif | |
| 341 | |
| 342 #if (NGX_STAT_STUB) | |
| 343 (void) ngx_atomic_fetch_add(ngx_stat_active, -1); | |
| 344 #endif | |
| 345 | |
| 346 pool = c->pool; | |
| 347 | |
| 348 ngx_close_connection(c); | |
| 349 | |
| 350 ngx_destroy_pool(pool); | |
| 351 } | |
| 352 | |
| 353 | |
| 354 static u_char * | |
| 355 ngx_stream_log_error(ngx_log_t *log, u_char *buf, size_t len) | |
| 356 { | |
| 357 u_char *p; | |
| 358 ngx_stream_session_t *s; | |
| 359 | |
| 360 if (log->action) { | |
| 361 p = ngx_snprintf(buf, len, " while %s", log->action); | |
| 362 len -= p - buf; | |
| 363 buf = p; | |
| 364 } | |
| 365 | |
| 366 s = log->data; | |
| 367 | |
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368 p = ngx_snprintf(buf, len, ", %sclient: %V, server: %V", |
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369 s->connection->type == SOCK_DGRAM ? "udp " : "", |
| 6115 | 370 &s->connection->addr_text, |
| 371 &s->connection->listening->addr_text); | |
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372 len -= p - buf; |
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373 buf = p; |
| 6115 | 374 |
| 375 if (s->log_handler) { | |
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376 p = s->log_handler(log, buf, len); |
| 6115 | 377 } |
| 378 | |
| 379 return p; | |
| 380 } |