Mercurial > hg > nginx-mail
annotate src/mail/ngx_mail_proxy_module.c @ 434:375518f786db
Mail: don't drop connection when RCPT TO fails.
Always pass reply for RCPT TO back to client and establish proxied
connection. There is no real reason to close connection here.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Wed, 10 Sep 2008 21:27:57 +0400 |
| parents | cd9cb7a3ff9e |
| children | 9b19e26b2660 |
| rev | line source |
|---|---|
| 290 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 */ | |
| 5 | |
| 6 | |
| 7 #include <ngx_config.h> | |
| 8 #include <ngx_core.h> | |
| 9 #include <ngx_event.h> | |
| 10 #include <ngx_event_connect.h> | |
| 11 #include <ngx_mail.h> | |
| 12 | |
| 13 | |
| 14 typedef struct { | |
| 15 ngx_flag_t enable; | |
| 16 ngx_flag_t pass_error_message; | |
| 17 ngx_flag_t xclient; | |
| 18 size_t buffer_size; | |
| 19 ngx_msec_t timeout; | |
| 20 } ngx_mail_proxy_conf_t; | |
| 21 | |
| 22 | |
| 23 static void ngx_mail_proxy_block_read(ngx_event_t *rev); | |
| 24 static void ngx_mail_proxy_pop3_handler(ngx_event_t *rev); | |
| 25 static void ngx_mail_proxy_imap_handler(ngx_event_t *rev); | |
| 26 static void ngx_mail_proxy_smtp_handler(ngx_event_t *rev); | |
| 27 static void ngx_mail_proxy_dummy_handler(ngx_event_t *ev); | |
| 28 static ngx_int_t ngx_mail_proxy_read_response(ngx_mail_session_t *s, | |
| 29 ngx_uint_t state); | |
| 30 static void ngx_mail_proxy_handler(ngx_event_t *ev); | |
| 31 static void ngx_mail_proxy_upstream_error(ngx_mail_session_t *s); | |
| 32 static void ngx_mail_proxy_internal_server_error(ngx_mail_session_t *s); | |
| 33 static void ngx_mail_proxy_close_session(ngx_mail_session_t *s); | |
| 34 static void *ngx_mail_proxy_create_conf(ngx_conf_t *cf); | |
| 35 static char *ngx_mail_proxy_merge_conf(ngx_conf_t *cf, void *parent, | |
| 36 void *child); | |
| 37 | |
| 38 | |
| 39 static ngx_command_t ngx_mail_proxy_commands[] = { | |
| 40 | |
| 41 { ngx_string("proxy"), | |
| 42 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG, | |
| 43 ngx_conf_set_flag_slot, | |
| 44 NGX_MAIL_SRV_CONF_OFFSET, | |
| 45 offsetof(ngx_mail_proxy_conf_t, enable), | |
| 46 NULL }, | |
| 47 | |
| 48 { ngx_string("proxy_buffer"), | |
| 49 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, | |
| 50 ngx_conf_set_size_slot, | |
| 51 NGX_MAIL_SRV_CONF_OFFSET, | |
| 52 offsetof(ngx_mail_proxy_conf_t, buffer_size), | |
| 53 NULL }, | |
| 54 | |
| 55 { ngx_string("proxy_timeout"), | |
| 56 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, | |
| 57 ngx_conf_set_msec_slot, | |
| 58 NGX_MAIL_SRV_CONF_OFFSET, | |
| 59 offsetof(ngx_mail_proxy_conf_t, timeout), | |
| 60 NULL }, | |
| 61 | |
| 62 { ngx_string("proxy_pass_error_message"), | |
| 63 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, | |
| 64 ngx_conf_set_flag_slot, | |
| 65 NGX_MAIL_SRV_CONF_OFFSET, | |
| 66 offsetof(ngx_mail_proxy_conf_t, pass_error_message), | |
| 67 NULL }, | |
| 68 | |
| 69 { ngx_string("xclient"), | |
| 70 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG, | |
| 71 ngx_conf_set_flag_slot, | |
| 72 NGX_MAIL_SRV_CONF_OFFSET, | |
| 73 offsetof(ngx_mail_proxy_conf_t, xclient), | |
| 74 NULL }, | |
| 75 | |
| 76 ngx_null_command | |
| 77 }; | |
| 78 | |
| 79 | |
| 80 static ngx_mail_module_t ngx_mail_proxy_module_ctx = { | |
| 336 | 81 NULL, /* protocol */ |
| 82 | |
| 290 | 83 NULL, /* create main configuration */ |
| 84 NULL, /* init main configuration */ | |
| 85 | |
| 86 ngx_mail_proxy_create_conf, /* create server configuration */ | |
| 87 ngx_mail_proxy_merge_conf /* merge server configuration */ | |
| 88 }; | |
| 89 | |
| 90 | |
| 91 ngx_module_t ngx_mail_proxy_module = { | |
| 92 NGX_MODULE_V1, | |
| 93 &ngx_mail_proxy_module_ctx, /* module context */ | |
| 94 ngx_mail_proxy_commands, /* module directives */ | |
| 95 NGX_MAIL_MODULE, /* module type */ | |
| 96 NULL, /* init master */ | |
| 97 NULL, /* init module */ | |
| 98 NULL, /* init process */ | |
| 99 NULL, /* init thread */ | |
| 100 NULL, /* exit thread */ | |
| 101 NULL, /* exit process */ | |
| 102 NULL, /* exit master */ | |
| 103 NGX_MODULE_V1_PADDING | |
| 104 }; | |
| 105 | |
| 106 | |
|
434
375518f786db
Mail: don't drop connection when RCPT TO fails.
Maxim Dounin <mdounin@mdounin.ru>
parents:
410
diff
changeset
|
107 static u_char smtp_ok[] = "235 2.0.0 OK" CRLF; |
| 290 | 108 |
| 109 | |
| 110 void | |
| 111 ngx_mail_proxy_init(ngx_mail_session_t *s, ngx_peer_addr_t *peer) | |
| 112 { | |
| 113 int keepalive; | |
| 114 ngx_int_t rc; | |
| 115 ngx_mail_proxy_ctx_t *p; | |
| 116 ngx_mail_proxy_conf_t *pcf; | |
| 117 ngx_mail_core_srv_conf_t *cscf; | |
| 118 | |
| 119 s->connection->log->action = "connecting to upstream"; | |
| 120 | |
| 121 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| 122 | |
| 123 if (cscf->so_keepalive) { | |
| 124 keepalive = 1; | |
| 125 | |
| 126 if (setsockopt(s->connection->fd, SOL_SOCKET, SO_KEEPALIVE, | |
| 127 (const void *) &keepalive, sizeof(int)) | |
| 128 == -1) | |
| 129 { | |
| 130 ngx_log_error(NGX_LOG_ALERT, s->connection->log, ngx_socket_errno, | |
| 131 "setsockopt(SO_KEEPALIVE) failed"); | |
| 132 } | |
| 133 } | |
| 134 | |
| 135 p = ngx_pcalloc(s->connection->pool, sizeof(ngx_mail_proxy_ctx_t)); | |
| 136 if (p == NULL) { | |
| 137 ngx_mail_session_internal_server_error(s); | |
| 138 return; | |
| 139 } | |
| 140 | |
| 141 s->proxy = p; | |
| 142 | |
| 143 p->upstream.sockaddr = peer->sockaddr; | |
| 144 p->upstream.socklen = peer->socklen; | |
| 145 p->upstream.name = &peer->name; | |
| 146 p->upstream.get = ngx_event_get_peer; | |
| 147 p->upstream.log = s->connection->log; | |
| 148 p->upstream.log_error = NGX_ERROR_ERR; | |
| 149 | |
| 150 rc = ngx_event_connect_peer(&p->upstream); | |
| 151 | |
| 152 if (rc == NGX_ERROR || rc == NGX_BUSY || rc == NGX_DECLINED) { | |
| 153 ngx_mail_proxy_internal_server_error(s); | |
| 154 return; | |
| 155 } | |
| 156 | |
| 157 ngx_add_timer(p->upstream.connection->read, cscf->timeout); | |
| 158 | |
| 159 p->upstream.connection->data = s; | |
| 160 p->upstream.connection->pool = s->connection->pool; | |
| 161 | |
| 162 s->connection->read->handler = ngx_mail_proxy_block_read; | |
| 163 p->upstream.connection->write->handler = ngx_mail_proxy_dummy_handler; | |
| 164 | |
| 165 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 166 | |
| 167 s->proxy->buffer = ngx_create_temp_buf(s->connection->pool, | |
| 168 pcf->buffer_size); | |
| 169 if (s->proxy->buffer == NULL) { | |
| 170 ngx_mail_proxy_internal_server_error(s); | |
| 171 return; | |
| 172 } | |
| 173 | |
| 372 | 174 s->out.len = 0; |
| 175 | |
| 290 | 176 switch (s->protocol) { |
| 177 | |
| 178 case NGX_MAIL_POP3_PROTOCOL: | |
| 179 p->upstream.connection->read->handler = ngx_mail_proxy_pop3_handler; | |
| 180 s->mail_state = ngx_pop3_start; | |
| 181 break; | |
| 182 | |
| 183 case NGX_MAIL_IMAP_PROTOCOL: | |
| 184 p->upstream.connection->read->handler = ngx_mail_proxy_imap_handler; | |
| 185 s->mail_state = ngx_imap_start; | |
| 186 break; | |
| 187 | |
| 188 default: /* NGX_MAIL_SMTP_PROTOCOL */ | |
| 189 p->upstream.connection->read->handler = ngx_mail_proxy_smtp_handler; | |
| 190 s->mail_state = ngx_smtp_start; | |
| 191 break; | |
| 192 } | |
| 193 } | |
| 194 | |
| 195 | |
| 196 static void | |
| 197 ngx_mail_proxy_block_read(ngx_event_t *rev) | |
| 198 { | |
| 199 ngx_connection_t *c; | |
| 200 ngx_mail_session_t *s; | |
| 201 | |
| 202 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy block read"); | |
| 203 | |
| 204 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) { | |
| 205 c = rev->data; | |
| 206 s = c->data; | |
| 207 | |
| 208 ngx_mail_proxy_close_session(s); | |
| 209 } | |
| 210 } | |
| 211 | |
| 212 | |
| 213 static void | |
| 214 ngx_mail_proxy_pop3_handler(ngx_event_t *rev) | |
| 215 { | |
| 216 u_char *p; | |
| 217 ngx_int_t rc; | |
| 218 ngx_str_t line; | |
| 219 ngx_connection_t *c; | |
| 220 ngx_mail_session_t *s; | |
| 221 ngx_mail_proxy_conf_t *pcf; | |
| 222 | |
| 223 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, | |
| 224 "mail proxy pop3 auth handler"); | |
| 225 | |
| 226 c = rev->data; | |
| 227 s = c->data; | |
| 228 | |
| 229 if (rev->timedout) { | |
| 230 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, | |
| 231 "upstream timed out"); | |
| 232 c->timedout = 1; | |
| 233 ngx_mail_proxy_internal_server_error(s); | |
| 234 return; | |
| 235 } | |
| 236 | |
| 237 rc = ngx_mail_proxy_read_response(s, 0); | |
| 238 | |
| 239 if (rc == NGX_AGAIN) { | |
| 240 return; | |
| 241 } | |
| 242 | |
| 243 if (rc == NGX_ERROR) { | |
| 244 ngx_mail_proxy_upstream_error(s); | |
| 245 return; | |
| 246 } | |
| 247 | |
| 248 switch (s->mail_state) { | |
| 249 | |
| 250 case ngx_pop3_start: | |
| 251 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send user"); | |
| 252 | |
| 253 s->connection->log->action = "sending user name to upstream"; | |
| 254 | |
| 255 line.len = sizeof("USER ") - 1 + s->login.len + 2; | |
| 382 | 256 line.data = ngx_pnalloc(c->pool, line.len); |
| 290 | 257 if (line.data == NULL) { |
| 258 ngx_mail_proxy_internal_server_error(s); | |
| 259 return; | |
| 260 } | |
| 261 | |
| 262 p = ngx_cpymem(line.data, "USER ", sizeof("USER ") - 1); | |
| 263 p = ngx_cpymem(p, s->login.data, s->login.len); | |
| 264 *p++ = CR; *p = LF; | |
| 265 | |
| 266 s->mail_state = ngx_pop3_user; | |
| 267 break; | |
| 268 | |
| 269 case ngx_pop3_user: | |
| 270 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send pass"); | |
| 271 | |
| 272 s->connection->log->action = "sending password to upstream"; | |
| 273 | |
| 274 line.len = sizeof("PASS ") - 1 + s->passwd.len + 2; | |
| 382 | 275 line.data = ngx_pnalloc(c->pool, line.len); |
| 290 | 276 if (line.data == NULL) { |
| 277 ngx_mail_proxy_internal_server_error(s); | |
| 278 return; | |
| 279 } | |
| 280 | |
| 281 p = ngx_cpymem(line.data, "PASS ", sizeof("PASS ") - 1); | |
| 282 p = ngx_cpymem(p, s->passwd.data, s->passwd.len); | |
| 283 *p++ = CR; *p = LF; | |
| 284 | |
| 285 s->mail_state = ngx_pop3_passwd; | |
| 286 break; | |
| 287 | |
| 288 case ngx_pop3_passwd: | |
| 289 s->connection->read->handler = ngx_mail_proxy_handler; | |
| 290 s->connection->write->handler = ngx_mail_proxy_handler; | |
| 291 rev->handler = ngx_mail_proxy_handler; | |
| 292 c->write->handler = ngx_mail_proxy_handler; | |
| 293 | |
| 294 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 295 ngx_add_timer(s->connection->read, pcf->timeout); | |
| 296 ngx_del_timer(c->read); | |
| 297 | |
| 298 c->log->action = NULL; | |
| 299 ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in"); | |
| 300 | |
| 301 ngx_mail_proxy_handler(s->connection->write); | |
| 302 | |
| 303 return; | |
| 304 | |
| 305 default: | |
| 306 #if (NGX_SUPPRESS_WARN) | |
| 307 line.len = 0; | |
| 308 line.data = NULL; | |
| 309 #endif | |
| 310 break; | |
| 311 } | |
| 312 | |
| 313 if (c->send(c, line.data, line.len) < (ssize_t) line.len) { | |
| 314 /* | |
| 315 * we treat the incomplete sending as NGX_ERROR | |
| 316 * because it is very strange here | |
| 317 */ | |
| 318 ngx_mail_proxy_internal_server_error(s); | |
| 319 return; | |
| 320 } | |
| 321 | |
| 322 s->proxy->buffer->pos = s->proxy->buffer->start; | |
| 323 s->proxy->buffer->last = s->proxy->buffer->start; | |
| 324 } | |
| 325 | |
| 326 | |
| 327 static void | |
| 328 ngx_mail_proxy_imap_handler(ngx_event_t *rev) | |
| 329 { | |
| 330 u_char *p; | |
| 331 ngx_int_t rc; | |
| 332 ngx_str_t line; | |
| 333 ngx_connection_t *c; | |
| 334 ngx_mail_session_t *s; | |
| 335 ngx_mail_proxy_conf_t *pcf; | |
| 336 | |
| 337 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, | |
| 338 "mail proxy imap auth handler"); | |
| 339 | |
| 340 c = rev->data; | |
| 341 s = c->data; | |
| 342 | |
| 343 if (rev->timedout) { | |
| 344 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, | |
| 345 "upstream timed out"); | |
| 346 c->timedout = 1; | |
| 347 ngx_mail_proxy_internal_server_error(s); | |
| 348 return; | |
| 349 } | |
| 350 | |
| 351 rc = ngx_mail_proxy_read_response(s, s->mail_state); | |
| 352 | |
| 353 if (rc == NGX_AGAIN) { | |
| 354 return; | |
| 355 } | |
| 356 | |
| 357 if (rc == NGX_ERROR) { | |
| 358 ngx_mail_proxy_upstream_error(s); | |
| 359 return; | |
| 360 } | |
| 361 | |
| 362 switch (s->mail_state) { | |
| 363 | |
| 364 case ngx_imap_start: | |
| 365 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, | |
| 366 "mail proxy send login"); | |
| 367 | |
| 368 s->connection->log->action = "sending LOGIN command to upstream"; | |
| 369 | |
| 370 line.len = s->tag.len + sizeof("LOGIN ") - 1 | |
| 371 + 1 + NGX_SIZE_T_LEN + 1 + 2; | |
| 382 | 372 line.data = ngx_pnalloc(c->pool, line.len); |
| 290 | 373 if (line.data == NULL) { |
| 374 ngx_mail_proxy_internal_server_error(s); | |
| 375 return; | |
| 376 } | |
| 377 | |
| 378 line.len = ngx_sprintf(line.data, "%VLOGIN {%uz}" CRLF, | |
| 379 &s->tag, s->login.len) | |
| 380 - line.data; | |
| 381 | |
| 382 s->mail_state = ngx_imap_login; | |
| 383 break; | |
| 384 | |
| 385 case ngx_imap_login: | |
| 386 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send user"); | |
| 387 | |
| 388 s->connection->log->action = "sending user name to upstream"; | |
| 389 | |
| 390 line.len = s->login.len + 1 + 1 + NGX_SIZE_T_LEN + 1 + 2; | |
| 382 | 391 line.data = ngx_pnalloc(c->pool, line.len); |
| 290 | 392 if (line.data == NULL) { |
| 393 ngx_mail_proxy_internal_server_error(s); | |
| 394 return; | |
| 395 } | |
| 396 | |
| 397 line.len = ngx_sprintf(line.data, "%V {%uz}" CRLF, | |
| 398 &s->login, s->passwd.len) | |
| 399 - line.data; | |
| 400 | |
| 401 s->mail_state = ngx_imap_user; | |
| 402 break; | |
| 403 | |
| 404 case ngx_imap_user: | |
| 405 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, | |
| 406 "mail proxy send passwd"); | |
| 407 | |
| 408 s->connection->log->action = "sending password to upstream"; | |
| 409 | |
| 410 line.len = s->passwd.len + 2; | |
| 382 | 411 line.data = ngx_pnalloc(c->pool, line.len); |
| 290 | 412 if (line.data == NULL) { |
| 413 ngx_mail_proxy_internal_server_error(s); | |
| 414 return; | |
| 415 } | |
| 416 | |
| 417 p = ngx_cpymem(line.data, s->passwd.data, s->passwd.len); | |
| 418 *p++ = CR; *p = LF; | |
| 419 | |
| 420 s->mail_state = ngx_imap_passwd; | |
| 421 break; | |
| 422 | |
| 423 case ngx_imap_passwd: | |
| 424 s->connection->read->handler = ngx_mail_proxy_handler; | |
| 425 s->connection->write->handler = ngx_mail_proxy_handler; | |
| 426 rev->handler = ngx_mail_proxy_handler; | |
| 427 c->write->handler = ngx_mail_proxy_handler; | |
| 428 | |
| 429 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 430 ngx_add_timer(s->connection->read, pcf->timeout); | |
| 431 ngx_del_timer(c->read); | |
| 432 | |
| 433 c->log->action = NULL; | |
| 434 ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in"); | |
| 435 | |
| 436 ngx_mail_proxy_handler(s->connection->write); | |
| 437 | |
| 438 return; | |
| 439 | |
| 440 default: | |
| 441 #if (NGX_SUPPRESS_WARN) | |
| 442 line.len = 0; | |
| 443 line.data = NULL; | |
| 444 #endif | |
| 445 break; | |
| 446 } | |
| 447 | |
| 448 if (c->send(c, line.data, line.len) < (ssize_t) line.len) { | |
| 449 /* | |
| 450 * we treat the incomplete sending as NGX_ERROR | |
| 451 * because it is very strange here | |
| 452 */ | |
| 453 ngx_mail_proxy_internal_server_error(s); | |
| 454 return; | |
| 455 } | |
| 456 | |
| 457 s->proxy->buffer->pos = s->proxy->buffer->start; | |
| 458 s->proxy->buffer->last = s->proxy->buffer->start; | |
| 459 } | |
| 460 | |
| 461 | |
| 462 static void | |
| 463 ngx_mail_proxy_smtp_handler(ngx_event_t *rev) | |
| 464 { | |
| 465 u_char *p; | |
| 466 ngx_int_t rc; | |
| 467 ngx_str_t line; | |
| 468 ngx_connection_t *c; | |
| 469 ngx_mail_session_t *s; | |
| 470 ngx_mail_proxy_conf_t *pcf; | |
| 471 ngx_mail_core_srv_conf_t *cscf; | |
| 472 | |
| 473 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, | |
| 474 "mail proxy smtp auth handler"); | |
| 475 | |
| 476 c = rev->data; | |
| 477 s = c->data; | |
| 478 | |
| 479 if (rev->timedout) { | |
| 480 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, | |
| 481 "upstream timed out"); | |
| 482 c->timedout = 1; | |
| 483 ngx_mail_proxy_internal_server_error(s); | |
| 484 return; | |
| 485 } | |
| 486 | |
| 487 rc = ngx_mail_proxy_read_response(s, s->mail_state); | |
| 488 | |
| 489 if (rc == NGX_AGAIN) { | |
| 490 return; | |
| 491 } | |
| 492 | |
| 493 if (rc == NGX_ERROR) { | |
| 494 ngx_mail_proxy_upstream_error(s); | |
| 495 return; | |
| 496 } | |
| 497 | |
| 498 switch (s->mail_state) { | |
| 499 | |
| 500 case ngx_smtp_start: | |
| 501 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send ehlo"); | |
| 502 | |
| 503 s->connection->log->action = "sending HELO/EHLO to upstream"; | |
| 504 | |
| 505 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| 506 | |
| 507 line.len = sizeof("HELO ") - 1 + cscf->server_name.len + 2; | |
| 382 | 508 line.data = ngx_pnalloc(c->pool, line.len); |
| 290 | 509 if (line.data == NULL) { |
| 510 ngx_mail_proxy_internal_server_error(s); | |
| 511 return; | |
| 512 } | |
| 513 | |
| 514 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 515 | |
| 516 p = ngx_cpymem(line.data, | |
| 517 ((s->esmtp || pcf->xclient) ? "EHLO " : "HELO "), | |
| 518 sizeof("HELO ") - 1); | |
| 519 | |
| 520 p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len); | |
| 521 *p++ = CR; *p = LF; | |
| 522 | |
|
400
f1e2fab7a46c
Mail: smtp proxy without authentication.
Maxim Dounin <mdounin@mdounin.ru>
parents:
296
diff
changeset
|
523 s->mail_state = pcf->xclient ? ngx_smtp_helo_xclient : |
|
404
481e8f936572
Mail: rename "unauth" to "none".
Maxim Dounin <mdounin@mdounin.ru>
parents:
400
diff
changeset
|
524 s->auth_method == NGX_MAIL_AUTH_NONE ? |
|
400
f1e2fab7a46c
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525 ngx_smtp_helo_from : ngx_smtp_helo; |
| 290 | 526 |
| 527 break; | |
| 528 | |
|
400
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529 case ngx_smtp_helo_xclient: |
| 290 | 530 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, |
| 531 "mail proxy send xclient"); | |
| 532 | |
| 533 s->connection->log->action = "sending XCLIENT to upstream"; | |
| 534 | |
| 366 | 535 line.len = sizeof("XCLIENT PROTO=SMTP HELO= ADDR= LOGIN= NAME=" |
| 536 CRLF) - 1 | |
| 290 | 537 + s->esmtp + s->smtp_helo.len |
| 366 | 538 + s->connection->addr_text.len + s->login.len + s->host.len; |
| 290 | 539 |
| 382 | 540 line.data = ngx_pnalloc(c->pool, line.len); |
| 290 | 541 if (line.data == NULL) { |
| 542 ngx_mail_proxy_internal_server_error(s); | |
| 543 return; | |
| 544 } | |
| 545 | |
|
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546 line.len = ngx_sprintf(line.data, |
|
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547 "XCLIENT PROTO=%sSMTP%s%V ADDR=%V%s%V " |
| 410 | 548 "NAME=%V" CRLF, |
|
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549 (s->esmtp ? "E" : ""), |
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550 (s->smtp_helo.len ? " HELO=" : ""), &s->smtp_helo, |
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551 &s->connection->addr_text, |
| 410 | 552 (s->login.len ? " LOGIN=" : ""), &s->login, &s->host) |
|
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553 - line.data; |
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554 |
|
404
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555 s->mail_state = s->auth_method == NGX_MAIL_AUTH_NONE ? |
|
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556 ngx_smtp_xclient_from : ngx_smtp_xclient; |
|
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557 |
|
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558 break; |
|
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559 |
|
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560 case ngx_smtp_helo_from: |
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561 case ngx_smtp_xclient_from: |
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562 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, |
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563 "mail proxy send mail from"); |
|
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564 |
|
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565 s->connection->log->action = "sending MAIL FROM to upstream"; |
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566 |
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567 line.len = s->smtp_from.len + sizeof(CRLF) - 1; |
| 410 | 568 line.data = ngx_pnalloc(c->pool, line.len); |
|
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569 if (line.data == NULL) { |
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570 ngx_mail_proxy_internal_server_error(s); |
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571 return; |
| 290 | 572 } |
| 573 | |
|
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574 p = ngx_cpymem(line.data, s->smtp_from.data, s->smtp_from.len); |
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575 *p++ = CR; *p = LF; |
|
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576 |
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577 s->mail_state = ngx_smtp_from; |
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578 |
| 290 | 579 break; |
| 580 | |
|
400
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581 case ngx_smtp_from: |
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582 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, |
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583 "mail proxy send rcpt to"); |
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584 |
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585 s->connection->log->action = "sending RCPT TO to upstream"; |
|
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586 |
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587 line.len = s->smtp_to.len + sizeof(CRLF) - 1; |
| 410 | 588 line.data = ngx_pnalloc(c->pool, line.len); |
|
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589 if (line.data == NULL) { |
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590 ngx_mail_proxy_internal_server_error(s); |
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591 return; |
|
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592 } |
|
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|
593 |
|
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594 p = ngx_cpymem(line.data, s->smtp_to.data, s->smtp_to.len); |
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595 *p++ = CR; *p = LF; |
|
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|
596 |
|
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597 s->mail_state = ngx_smtp_to; |
|
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|
598 |
|
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599 break; |
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|
600 |
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601 case ngx_smtp_helo: |
| 290 | 602 case ngx_smtp_xclient: |
|
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|
603 case ngx_smtp_to: |
| 290 | 604 |
|
434
375518f786db
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|
605 if (s->auth_method != NGX_MAIL_AUTH_NONE) { |
|
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diff
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|
606 ngx_memcpy(s->proxy->buffer->start, smtp_ok, |
|
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|
607 sizeof(smtp_ok) - 1); |
|
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608 s->proxy->buffer->last = s->proxy->buffer->start |
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609 + sizeof(smtp_ok) - 1; |
|
434
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|
610 s->proxy->buffer->pos = s->proxy->buffer->start; |
|
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611 } |
| 290 | 612 |
| 613 | |
| 614 s->connection->read->handler = ngx_mail_proxy_handler; | |
| 615 s->connection->write->handler = ngx_mail_proxy_handler; | |
| 616 rev->handler = ngx_mail_proxy_handler; | |
| 617 c->write->handler = ngx_mail_proxy_handler; | |
| 618 | |
| 619 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 620 ngx_add_timer(s->connection->read, pcf->timeout); | |
| 621 ngx_del_timer(c->read); | |
| 622 | |
| 623 c->log->action = NULL; | |
| 624 ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in"); | |
| 625 | |
| 626 ngx_mail_proxy_handler(s->connection->write); | |
| 627 | |
| 628 return; | |
| 629 | |
| 630 default: | |
| 631 #if (NGX_SUPPRESS_WARN) | |
| 632 line.len = 0; | |
| 633 line.data = NULL; | |
| 634 #endif | |
| 635 break; | |
| 636 } | |
| 637 | |
| 638 if (c->send(c, line.data, line.len) < (ssize_t) line.len) { | |
| 639 /* | |
| 640 * we treat the incomplete sending as NGX_ERROR | |
| 641 * because it is very strange here | |
| 642 */ | |
| 643 ngx_mail_proxy_internal_server_error(s); | |
| 644 return; | |
| 645 } | |
| 646 | |
| 647 s->proxy->buffer->pos = s->proxy->buffer->start; | |
| 648 s->proxy->buffer->last = s->proxy->buffer->start; | |
| 649 } | |
| 650 | |
| 651 | |
| 652 static void | |
| 653 ngx_mail_proxy_dummy_handler(ngx_event_t *wev) | |
| 654 { | |
| 655 ngx_connection_t *c; | |
| 656 ngx_mail_session_t *s; | |
| 657 | |
| 658 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, wev->log, 0, "mail proxy dummy handler"); | |
| 659 | |
| 660 if (ngx_handle_write_event(wev, 0) == NGX_ERROR) { | |
| 661 c = wev->data; | |
| 662 s = c->data; | |
| 663 | |
| 664 ngx_mail_proxy_close_session(s); | |
| 665 } | |
| 666 } | |
| 667 | |
| 668 | |
| 669 static ngx_int_t | |
| 670 ngx_mail_proxy_read_response(ngx_mail_session_t *s, ngx_uint_t state) | |
| 671 { | |
| 672 u_char *p; | |
| 673 ssize_t n; | |
| 674 ngx_buf_t *b; | |
| 675 ngx_mail_proxy_conf_t *pcf; | |
| 676 | |
| 677 s->connection->log->action = "reading response from upstream"; | |
| 678 | |
| 679 b = s->proxy->buffer; | |
| 680 | |
| 681 n = s->proxy->upstream.connection->recv(s->proxy->upstream.connection, | |
| 682 b->last, b->end - b->last); | |
| 683 | |
| 684 if (n == NGX_ERROR || n == 0) { | |
| 685 return NGX_ERROR; | |
| 686 } | |
| 687 | |
| 688 if (n == NGX_AGAIN) { | |
| 689 return NGX_AGAIN; | |
| 690 } | |
| 691 | |
| 692 b->last += n; | |
| 693 | |
| 694 if (b->last - b->pos < 5) { | |
| 695 return NGX_AGAIN; | |
| 696 } | |
| 697 | |
| 698 if (*(b->last - 2) != CR || *(b->last - 1) != LF) { | |
| 699 if (b->last == b->end) { | |
| 700 *(b->last - 1) = '\0'; | |
| 701 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0, | |
| 702 "upstream sent too long response line: \"%s\"", | |
| 703 b->pos); | |
| 704 return NGX_ERROR; | |
| 705 } | |
| 706 | |
| 707 return NGX_AGAIN; | |
| 708 } | |
| 709 | |
| 710 p = b->pos; | |
| 711 | |
| 712 switch (s->protocol) { | |
| 713 | |
| 714 case NGX_MAIL_POP3_PROTOCOL: | |
| 715 if (p[0] == '+' && p[1] == 'O' && p[2] == 'K') { | |
| 716 return NGX_OK; | |
| 717 } | |
| 718 break; | |
| 719 | |
| 720 case NGX_MAIL_IMAP_PROTOCOL: | |
| 721 switch (state) { | |
| 722 | |
| 723 case ngx_imap_start: | |
| 724 if (p[0] == '*' && p[1] == ' ' && p[2] == 'O' && p[3] == 'K') { | |
| 725 return NGX_OK; | |
| 726 } | |
| 727 break; | |
| 728 | |
| 729 case ngx_imap_login: | |
| 730 case ngx_imap_user: | |
| 731 if (p[0] == '+') { | |
| 732 return NGX_OK; | |
| 733 } | |
| 734 break; | |
| 735 | |
| 736 case ngx_imap_passwd: | |
| 737 if (ngx_strncmp(p, s->tag.data, s->tag.len) == 0) { | |
| 738 p += s->tag.len; | |
| 739 if (p[0] == 'O' && p[1] == 'K') { | |
| 740 return NGX_OK; | |
| 741 } | |
| 742 } | |
| 743 break; | |
| 744 } | |
| 745 | |
| 746 break; | |
| 747 | |
| 748 default: /* NGX_MAIL_SMTP_PROTOCOL */ | |
| 749 switch (state) { | |
| 750 | |
|
434
375518f786db
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|
751 case ngx_smtp_to: |
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|
752 return NGX_OK; |
|
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410
diff
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|
753 |
| 290 | 754 case ngx_smtp_helo: |
|
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755 case ngx_smtp_helo_from: |
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756 case ngx_smtp_helo_xclient: |
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757 case ngx_smtp_from: |
| 296 | 758 if (p[0] == '2' && p[1] == '5' && p[2] == '0') { |
| 759 return NGX_OK; | |
| 760 } | |
| 761 break; | |
| 290 | 762 |
| 763 case ngx_smtp_start: | |
|
400
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764 if (p[0] == '2' && p[1] == '2' && p[2] == '0') { |
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765 return NGX_OK; |
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766 } |
|
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767 break; |
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|
768 |
| 290 | 769 case ngx_smtp_xclient: |
|
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770 case ngx_smtp_xclient_from: |
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771 if (p[0] == '2' && (p[1] == '2' || p[1] == '5') && p[2] == '0') { |
| 296 | 772 return NGX_OK; |
| 773 } | |
| 774 break; | |
| 290 | 775 } |
| 776 | |
| 296 | 777 break; |
| 290 | 778 } |
| 779 | |
| 780 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 781 | |
| 782 if (pcf->pass_error_message == 0) { | |
| 783 *(b->last - 2) = '\0'; | |
| 784 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0, | |
| 785 "upstream sent invalid response: \"%s\"", p); | |
| 786 return NGX_ERROR; | |
| 787 } | |
| 788 | |
| 789 s->out.len = b->last - p - 2; | |
| 790 s->out.data = p; | |
| 791 | |
| 792 ngx_log_error(NGX_LOG_INFO, s->connection->log, 0, | |
| 793 "upstream sent invalid response: \"%V\"", &s->out); | |
| 794 | |
| 795 s->out.len = b->last - b->pos; | |
| 796 s->out.data = b->pos; | |
| 797 | |
| 798 return NGX_ERROR; | |
| 799 } | |
| 800 | |
| 801 | |
| 802 static void | |
| 803 ngx_mail_proxy_handler(ngx_event_t *ev) | |
| 804 { | |
| 805 char *action, *recv_action, *send_action; | |
| 806 size_t size; | |
| 807 ssize_t n; | |
| 808 ngx_buf_t *b; | |
| 809 ngx_uint_t do_write; | |
| 810 ngx_connection_t *c, *src, *dst; | |
| 811 ngx_mail_session_t *s; | |
| 812 ngx_mail_proxy_conf_t *pcf; | |
| 813 | |
| 814 c = ev->data; | |
| 815 s = c->data; | |
| 816 | |
| 817 if (ev->timedout) { | |
| 818 c->log->action = "proxying"; | |
| 819 | |
| 820 if (c == s->connection) { | |
| 821 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, | |
| 822 "client timed out"); | |
| 823 c->timedout = 1; | |
| 824 | |
| 825 } else { | |
| 826 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, | |
| 827 "upstream timed out"); | |
| 828 } | |
| 829 | |
| 830 ngx_mail_proxy_close_session(s); | |
| 831 return; | |
| 832 } | |
| 833 | |
| 834 if (c == s->connection) { | |
| 835 if (ev->write) { | |
| 836 recv_action = "proxying and reading from upstream"; | |
| 837 send_action = "proxying and sending to client"; | |
| 838 src = s->proxy->upstream.connection; | |
| 839 dst = c; | |
| 840 b = s->proxy->buffer; | |
| 841 | |
| 842 } else { | |
| 843 recv_action = "proxying and reading from client"; | |
| 844 send_action = "proxying and sending to upstream"; | |
| 845 src = c; | |
| 846 dst = s->proxy->upstream.connection; | |
| 847 b = s->buffer; | |
| 848 } | |
| 849 | |
| 850 } else { | |
| 851 if (ev->write) { | |
| 852 recv_action = "proxying and reading from client"; | |
| 853 send_action = "proxying and sending to upstream"; | |
| 854 src = s->connection; | |
| 855 dst = c; | |
| 856 b = s->buffer; | |
| 857 | |
| 858 } else { | |
| 859 recv_action = "proxying and reading from upstream"; | |
| 860 send_action = "proxying and sending to client"; | |
| 861 src = c; | |
| 862 dst = s->connection; | |
| 863 b = s->proxy->buffer; | |
| 864 } | |
| 865 } | |
| 866 | |
| 867 do_write = ev->write ? 1 : 0; | |
| 868 | |
| 869 ngx_log_debug3(NGX_LOG_DEBUG_MAIL, ev->log, 0, | |
| 870 "mail proxy handler: %d, #%d > #%d", | |
| 871 do_write, src->fd, dst->fd); | |
| 872 | |
| 873 for ( ;; ) { | |
| 874 | |
| 875 if (do_write) { | |
| 876 | |
| 877 size = b->last - b->pos; | |
| 878 | |
| 879 if (size && dst->write->ready) { | |
| 880 c->log->action = send_action; | |
| 881 | |
| 882 n = dst->send(dst, b->pos, size); | |
| 883 | |
| 884 if (n == NGX_ERROR) { | |
| 885 ngx_mail_proxy_close_session(s); | |
| 886 return; | |
| 887 } | |
| 888 | |
| 889 if (n > 0) { | |
| 890 b->pos += n; | |
| 891 | |
| 892 if (b->pos == b->last) { | |
| 893 b->pos = b->start; | |
| 894 b->last = b->start; | |
| 895 } | |
| 896 } | |
| 897 } | |
| 898 } | |
| 899 | |
| 900 size = b->end - b->last; | |
| 901 | |
| 902 if (size && src->read->ready) { | |
| 903 c->log->action = recv_action; | |
| 904 | |
| 905 n = src->recv(src, b->last, size); | |
| 906 | |
| 907 if (n == NGX_AGAIN || n == 0) { | |
| 908 break; | |
| 909 } | |
| 910 | |
| 911 if (n > 0) { | |
| 912 do_write = 1; | |
| 913 b->last += n; | |
| 914 | |
| 915 continue; | |
| 916 } | |
| 917 | |
| 918 if (n == NGX_ERROR) { | |
| 919 src->read->eof = 1; | |
| 920 } | |
| 921 } | |
| 922 | |
| 923 break; | |
| 924 } | |
| 925 | |
| 926 c->log->action = "proxying"; | |
| 927 | |
| 324 | 928 if ((s->connection->read->eof && s->buffer->pos == s->buffer->last) |
| 929 || (s->proxy->upstream.connection->read->eof | |
| 930 && s->proxy->buffer->pos == s->proxy->buffer->last) | |
| 931 || (s->connection->read->eof | |
| 932 && s->proxy->upstream.connection->read->eof)) | |
| 290 | 933 { |
| 934 action = c->log->action; | |
| 935 c->log->action = NULL; | |
| 936 ngx_log_error(NGX_LOG_INFO, c->log, 0, "proxied session done"); | |
| 937 c->log->action = action; | |
| 938 | |
| 939 ngx_mail_proxy_close_session(s); | |
| 940 return; | |
| 941 } | |
| 942 | |
| 943 if (ngx_handle_write_event(dst->write, 0) == NGX_ERROR) { | |
| 944 ngx_mail_proxy_close_session(s); | |
| 945 return; | |
| 946 } | |
| 947 | |
| 948 if (ngx_handle_read_event(dst->read, 0) == NGX_ERROR) { | |
| 949 ngx_mail_proxy_close_session(s); | |
| 950 return; | |
| 951 } | |
| 952 | |
| 953 if (ngx_handle_write_event(src->write, 0) == NGX_ERROR) { | |
| 954 ngx_mail_proxy_close_session(s); | |
| 955 return; | |
| 956 } | |
| 957 | |
| 958 if (ngx_handle_read_event(src->read, 0) == NGX_ERROR) { | |
| 959 ngx_mail_proxy_close_session(s); | |
| 960 return; | |
| 961 } | |
| 962 | |
| 963 if (c == s->connection) { | |
| 964 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 965 ngx_add_timer(c->read, pcf->timeout); | |
| 966 } | |
| 967 } | |
| 968 | |
| 969 | |
| 970 static void | |
| 971 ngx_mail_proxy_upstream_error(ngx_mail_session_t *s) | |
| 972 { | |
| 973 if (s->proxy->upstream.connection) { | |
| 974 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0, | |
| 975 "close mail proxy connection: %d", | |
| 976 s->proxy->upstream.connection->fd); | |
| 977 | |
| 978 ngx_close_connection(s->proxy->upstream.connection); | |
| 979 } | |
| 980 | |
| 981 if (s->out.len == 0) { | |
| 982 ngx_mail_session_internal_server_error(s); | |
| 983 return; | |
| 984 } | |
| 985 | |
| 986 s->quit = 1; | |
| 987 ngx_mail_send(s->connection->write); | |
| 988 } | |
| 989 | |
| 990 | |
| 991 static void | |
| 992 ngx_mail_proxy_internal_server_error(ngx_mail_session_t *s) | |
| 993 { | |
| 994 if (s->proxy->upstream.connection) { | |
| 995 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0, | |
| 996 "close mail proxy connection: %d", | |
| 997 s->proxy->upstream.connection->fd); | |
| 998 | |
| 999 ngx_close_connection(s->proxy->upstream.connection); | |
| 1000 } | |
| 1001 | |
| 1002 ngx_mail_session_internal_server_error(s); | |
| 1003 } | |
| 1004 | |
| 1005 | |
| 1006 static void | |
| 1007 ngx_mail_proxy_close_session(ngx_mail_session_t *s) | |
| 1008 { | |
| 1009 if (s->proxy->upstream.connection) { | |
| 1010 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0, | |
| 1011 "close mail proxy connection: %d", | |
| 1012 s->proxy->upstream.connection->fd); | |
| 1013 | |
| 1014 ngx_close_connection(s->proxy->upstream.connection); | |
| 1015 } | |
| 1016 | |
| 1017 ngx_mail_close_connection(s->connection); | |
| 1018 } | |
| 1019 | |
| 1020 | |
| 1021 static void * | |
| 1022 ngx_mail_proxy_create_conf(ngx_conf_t *cf) | |
| 1023 { | |
| 1024 ngx_mail_proxy_conf_t *pcf; | |
| 1025 | |
| 1026 pcf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_proxy_conf_t)); | |
| 1027 if (pcf == NULL) { | |
| 1028 return NGX_CONF_ERROR; | |
| 1029 } | |
| 1030 | |
| 1031 pcf->enable = NGX_CONF_UNSET; | |
| 1032 pcf->pass_error_message = NGX_CONF_UNSET; | |
| 1033 pcf->xclient = NGX_CONF_UNSET; | |
| 1034 pcf->buffer_size = NGX_CONF_UNSET_SIZE; | |
| 1035 pcf->timeout = NGX_CONF_UNSET_MSEC; | |
| 1036 | |
| 1037 return pcf; | |
| 1038 } | |
| 1039 | |
| 1040 | |
| 1041 static char * | |
| 1042 ngx_mail_proxy_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 1043 { | |
| 1044 ngx_mail_proxy_conf_t *prev = parent; | |
| 1045 ngx_mail_proxy_conf_t *conf = child; | |
| 1046 | |
| 1047 ngx_conf_merge_value(conf->enable, prev->enable, 0); | |
| 1048 ngx_conf_merge_value(conf->pass_error_message, prev->pass_error_message, 0); | |
| 1049 ngx_conf_merge_value(conf->xclient, prev->xclient, 1); | |
| 1050 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size, | |
| 1051 (size_t) ngx_pagesize); | |
| 1052 ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 24 * 60 * 60000); | |
| 1053 | |
| 1054 return NGX_CONF_OK; | |
| 1055 } |