Mercurial > hg > nginx-mail
annotate src/mail/ngx_mail_proxy_module.c @ 407:fa809001e681
Merge with nginx 0.6.6.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Thu, 02 Aug 2007 23:38:26 +0000 |
| parents | 481e8f936572 f7cd062ee035 |
| children | 52b28d322d76 |
| 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 = { | |
| 81 NULL, /* create main configuration */ | |
| 82 NULL, /* init main configuration */ | |
| 83 | |
| 84 ngx_mail_proxy_create_conf, /* create server configuration */ | |
| 85 ngx_mail_proxy_merge_conf /* merge server configuration */ | |
| 86 }; | |
| 87 | |
| 88 | |
| 89 ngx_module_t ngx_mail_proxy_module = { | |
| 90 NGX_MODULE_V1, | |
| 91 &ngx_mail_proxy_module_ctx, /* module context */ | |
| 92 ngx_mail_proxy_commands, /* module directives */ | |
| 93 NGX_MAIL_MODULE, /* module type */ | |
| 94 NULL, /* init master */ | |
| 95 NULL, /* init module */ | |
| 96 NULL, /* init process */ | |
| 97 NULL, /* init thread */ | |
| 98 NULL, /* exit thread */ | |
| 99 NULL, /* exit process */ | |
| 100 NULL, /* exit master */ | |
| 101 NGX_MODULE_V1_PADDING | |
| 102 }; | |
| 103 | |
| 104 | |
|
400
f1e2fab7a46c
Mail: smtp proxy without authentication.
Maxim Dounin <mdounin@mdounin.ru>
parents:
296
diff
changeset
|
105 static u_char smtp_auth_ok[] = "235 2.0.0 OK" CRLF; |
|
f1e2fab7a46c
Mail: smtp proxy without authentication.
Maxim Dounin <mdounin@mdounin.ru>
parents:
296
diff
changeset
|
106 static u_char smtp_ok[] = "250 2.0.0 OK" CRLF; |
| 290 | 107 |
| 108 | |
| 109 void | |
| 110 ngx_mail_proxy_init(ngx_mail_session_t *s, ngx_peer_addr_t *peer) | |
| 111 { | |
| 112 int keepalive; | |
| 113 ngx_int_t rc; | |
| 114 ngx_mail_proxy_ctx_t *p; | |
| 115 ngx_mail_proxy_conf_t *pcf; | |
| 116 ngx_mail_core_srv_conf_t *cscf; | |
| 117 | |
| 118 s->connection->log->action = "connecting to upstream"; | |
| 119 | |
| 120 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| 121 | |
| 122 if (cscf->so_keepalive) { | |
| 123 keepalive = 1; | |
| 124 | |
| 125 if (setsockopt(s->connection->fd, SOL_SOCKET, SO_KEEPALIVE, | |
| 126 (const void *) &keepalive, sizeof(int)) | |
| 127 == -1) | |
| 128 { | |
| 129 ngx_log_error(NGX_LOG_ALERT, s->connection->log, ngx_socket_errno, | |
| 130 "setsockopt(SO_KEEPALIVE) failed"); | |
| 131 } | |
| 132 } | |
| 133 | |
| 134 p = ngx_pcalloc(s->connection->pool, sizeof(ngx_mail_proxy_ctx_t)); | |
| 135 if (p == NULL) { | |
| 136 ngx_mail_session_internal_server_error(s); | |
| 137 return; | |
| 138 } | |
| 139 | |
| 140 s->proxy = p; | |
| 141 | |
| 142 p->upstream.sockaddr = peer->sockaddr; | |
| 143 p->upstream.socklen = peer->socklen; | |
| 144 p->upstream.name = &peer->name; | |
| 145 p->upstream.get = ngx_event_get_peer; | |
| 146 p->upstream.log = s->connection->log; | |
| 147 p->upstream.log_error = NGX_ERROR_ERR; | |
| 148 | |
| 149 rc = ngx_event_connect_peer(&p->upstream); | |
| 150 | |
| 151 if (rc == NGX_ERROR || rc == NGX_BUSY || rc == NGX_DECLINED) { | |
| 152 ngx_mail_proxy_internal_server_error(s); | |
| 153 return; | |
| 154 } | |
| 155 | |
| 156 ngx_add_timer(p->upstream.connection->read, cscf->timeout); | |
| 157 | |
| 158 p->upstream.connection->data = s; | |
| 159 p->upstream.connection->pool = s->connection->pool; | |
| 160 | |
| 161 s->connection->read->handler = ngx_mail_proxy_block_read; | |
| 162 p->upstream.connection->write->handler = ngx_mail_proxy_dummy_handler; | |
| 163 | |
| 164 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 165 | |
| 166 s->proxy->buffer = ngx_create_temp_buf(s->connection->pool, | |
| 167 pcf->buffer_size); | |
| 168 if (s->proxy->buffer == NULL) { | |
| 169 ngx_mail_proxy_internal_server_error(s); | |
| 170 return; | |
| 171 } | |
| 172 | |
| 173 switch (s->protocol) { | |
| 174 | |
| 175 case NGX_MAIL_POP3_PROTOCOL: | |
| 176 p->upstream.connection->read->handler = ngx_mail_proxy_pop3_handler; | |
| 177 s->mail_state = ngx_pop3_start; | |
| 178 break; | |
| 179 | |
| 180 case NGX_MAIL_IMAP_PROTOCOL: | |
| 181 p->upstream.connection->read->handler = ngx_mail_proxy_imap_handler; | |
| 182 s->mail_state = ngx_imap_start; | |
| 183 break; | |
| 184 | |
| 185 default: /* NGX_MAIL_SMTP_PROTOCOL */ | |
| 186 p->upstream.connection->read->handler = ngx_mail_proxy_smtp_handler; | |
| 187 s->mail_state = ngx_smtp_start; | |
| 188 break; | |
| 189 } | |
| 190 } | |
| 191 | |
| 192 | |
| 193 static void | |
| 194 ngx_mail_proxy_block_read(ngx_event_t *rev) | |
| 195 { | |
| 196 ngx_connection_t *c; | |
| 197 ngx_mail_session_t *s; | |
| 198 | |
| 199 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy block read"); | |
| 200 | |
| 201 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) { | |
| 202 c = rev->data; | |
| 203 s = c->data; | |
| 204 | |
| 205 ngx_mail_proxy_close_session(s); | |
| 206 } | |
| 207 } | |
| 208 | |
| 209 | |
| 210 static void | |
| 211 ngx_mail_proxy_pop3_handler(ngx_event_t *rev) | |
| 212 { | |
| 213 u_char *p; | |
| 214 ngx_int_t rc; | |
| 215 ngx_str_t line; | |
| 216 ngx_connection_t *c; | |
| 217 ngx_mail_session_t *s; | |
| 218 ngx_mail_proxy_conf_t *pcf; | |
| 219 | |
| 220 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, | |
| 221 "mail proxy pop3 auth handler"); | |
| 222 | |
| 223 c = rev->data; | |
| 224 s = c->data; | |
| 225 | |
| 226 if (rev->timedout) { | |
| 227 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, | |
| 228 "upstream timed out"); | |
| 229 c->timedout = 1; | |
| 230 ngx_mail_proxy_internal_server_error(s); | |
| 231 return; | |
| 232 } | |
| 233 | |
| 234 rc = ngx_mail_proxy_read_response(s, 0); | |
| 235 | |
| 236 if (rc == NGX_AGAIN) { | |
| 237 return; | |
| 238 } | |
| 239 | |
| 240 if (rc == NGX_ERROR) { | |
| 241 ngx_mail_proxy_upstream_error(s); | |
| 242 return; | |
| 243 } | |
| 244 | |
| 245 switch (s->mail_state) { | |
| 246 | |
| 247 case ngx_pop3_start: | |
| 248 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send user"); | |
| 249 | |
| 250 s->connection->log->action = "sending user name to upstream"; | |
| 251 | |
| 252 line.len = sizeof("USER ") - 1 + s->login.len + 2; | |
| 253 line.data = ngx_palloc(c->pool, line.len); | |
| 254 if (line.data == NULL) { | |
| 255 ngx_mail_proxy_internal_server_error(s); | |
| 256 return; | |
| 257 } | |
| 258 | |
| 259 p = ngx_cpymem(line.data, "USER ", sizeof("USER ") - 1); | |
| 260 p = ngx_cpymem(p, s->login.data, s->login.len); | |
| 261 *p++ = CR; *p = LF; | |
| 262 | |
| 263 s->mail_state = ngx_pop3_user; | |
| 264 break; | |
| 265 | |
| 266 case ngx_pop3_user: | |
| 267 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send pass"); | |
| 268 | |
| 269 s->connection->log->action = "sending password to upstream"; | |
| 270 | |
| 271 line.len = sizeof("PASS ") - 1 + s->passwd.len + 2; | |
| 272 line.data = ngx_palloc(c->pool, line.len); | |
| 273 if (line.data == NULL) { | |
| 274 ngx_mail_proxy_internal_server_error(s); | |
| 275 return; | |
| 276 } | |
| 277 | |
| 278 p = ngx_cpymem(line.data, "PASS ", sizeof("PASS ") - 1); | |
| 279 p = ngx_cpymem(p, s->passwd.data, s->passwd.len); | |
| 280 *p++ = CR; *p = LF; | |
| 281 | |
| 282 s->mail_state = ngx_pop3_passwd; | |
| 283 break; | |
| 284 | |
| 285 case ngx_pop3_passwd: | |
| 286 s->connection->read->handler = ngx_mail_proxy_handler; | |
| 287 s->connection->write->handler = ngx_mail_proxy_handler; | |
| 288 rev->handler = ngx_mail_proxy_handler; | |
| 289 c->write->handler = ngx_mail_proxy_handler; | |
| 290 | |
| 291 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 292 ngx_add_timer(s->connection->read, pcf->timeout); | |
| 293 ngx_del_timer(c->read); | |
| 294 | |
| 295 c->log->action = NULL; | |
| 296 ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in"); | |
| 297 | |
| 298 ngx_mail_proxy_handler(s->connection->write); | |
| 299 | |
| 300 return; | |
| 301 | |
| 302 default: | |
| 303 #if (NGX_SUPPRESS_WARN) | |
| 304 line.len = 0; | |
| 305 line.data = NULL; | |
| 306 #endif | |
| 307 break; | |
| 308 } | |
| 309 | |
| 310 if (c->send(c, line.data, line.len) < (ssize_t) line.len) { | |
| 311 /* | |
| 312 * we treat the incomplete sending as NGX_ERROR | |
| 313 * because it is very strange here | |
| 314 */ | |
| 315 ngx_mail_proxy_internal_server_error(s); | |
| 316 return; | |
| 317 } | |
| 318 | |
| 319 s->proxy->buffer->pos = s->proxy->buffer->start; | |
| 320 s->proxy->buffer->last = s->proxy->buffer->start; | |
| 321 } | |
| 322 | |
| 323 | |
| 324 static void | |
| 325 ngx_mail_proxy_imap_handler(ngx_event_t *rev) | |
| 326 { | |
| 327 u_char *p; | |
| 328 ngx_int_t rc; | |
| 329 ngx_str_t line; | |
| 330 ngx_connection_t *c; | |
| 331 ngx_mail_session_t *s; | |
| 332 ngx_mail_proxy_conf_t *pcf; | |
| 333 | |
| 334 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, | |
| 335 "mail proxy imap auth handler"); | |
| 336 | |
| 337 c = rev->data; | |
| 338 s = c->data; | |
| 339 | |
| 340 if (rev->timedout) { | |
| 341 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, | |
| 342 "upstream timed out"); | |
| 343 c->timedout = 1; | |
| 344 ngx_mail_proxy_internal_server_error(s); | |
| 345 return; | |
| 346 } | |
| 347 | |
| 348 rc = ngx_mail_proxy_read_response(s, s->mail_state); | |
| 349 | |
| 350 if (rc == NGX_AGAIN) { | |
| 351 return; | |
| 352 } | |
| 353 | |
| 354 if (rc == NGX_ERROR) { | |
| 355 ngx_mail_proxy_upstream_error(s); | |
| 356 return; | |
| 357 } | |
| 358 | |
| 359 switch (s->mail_state) { | |
| 360 | |
| 361 case ngx_imap_start: | |
| 362 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, | |
| 363 "mail proxy send login"); | |
| 364 | |
| 365 s->connection->log->action = "sending LOGIN command to upstream"; | |
| 366 | |
| 367 line.len = s->tag.len + sizeof("LOGIN ") - 1 | |
| 368 + 1 + NGX_SIZE_T_LEN + 1 + 2; | |
| 369 line.data = ngx_palloc(c->pool, line.len); | |
| 370 if (line.data == NULL) { | |
| 371 ngx_mail_proxy_internal_server_error(s); | |
| 372 return; | |
| 373 } | |
| 374 | |
| 375 line.len = ngx_sprintf(line.data, "%VLOGIN {%uz}" CRLF, | |
| 376 &s->tag, s->login.len) | |
| 377 - line.data; | |
| 378 | |
| 379 s->mail_state = ngx_imap_login; | |
| 380 break; | |
| 381 | |
| 382 case ngx_imap_login: | |
| 383 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send user"); | |
| 384 | |
| 385 s->connection->log->action = "sending user name to upstream"; | |
| 386 | |
| 387 line.len = s->login.len + 1 + 1 + NGX_SIZE_T_LEN + 1 + 2; | |
| 388 line.data = ngx_palloc(c->pool, line.len); | |
| 389 if (line.data == NULL) { | |
| 390 ngx_mail_proxy_internal_server_error(s); | |
| 391 return; | |
| 392 } | |
| 393 | |
| 394 line.len = ngx_sprintf(line.data, "%V {%uz}" CRLF, | |
| 395 &s->login, s->passwd.len) | |
| 396 - line.data; | |
| 397 | |
| 398 s->mail_state = ngx_imap_user; | |
| 399 break; | |
| 400 | |
| 401 case ngx_imap_user: | |
| 402 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, | |
| 403 "mail proxy send passwd"); | |
| 404 | |
| 405 s->connection->log->action = "sending password to upstream"; | |
| 406 | |
| 407 line.len = s->passwd.len + 2; | |
| 408 line.data = ngx_palloc(c->pool, line.len); | |
| 409 if (line.data == NULL) { | |
| 410 ngx_mail_proxy_internal_server_error(s); | |
| 411 return; | |
| 412 } | |
| 413 | |
| 414 p = ngx_cpymem(line.data, s->passwd.data, s->passwd.len); | |
| 415 *p++ = CR; *p = LF; | |
| 416 | |
| 417 s->mail_state = ngx_imap_passwd; | |
| 418 break; | |
| 419 | |
| 420 case ngx_imap_passwd: | |
| 421 s->connection->read->handler = ngx_mail_proxy_handler; | |
| 422 s->connection->write->handler = ngx_mail_proxy_handler; | |
| 423 rev->handler = ngx_mail_proxy_handler; | |
| 424 c->write->handler = ngx_mail_proxy_handler; | |
| 425 | |
| 426 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 427 ngx_add_timer(s->connection->read, pcf->timeout); | |
| 428 ngx_del_timer(c->read); | |
| 429 | |
| 430 c->log->action = NULL; | |
| 431 ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in"); | |
| 432 | |
| 433 ngx_mail_proxy_handler(s->connection->write); | |
| 434 | |
| 435 return; | |
| 436 | |
| 437 default: | |
| 438 #if (NGX_SUPPRESS_WARN) | |
| 439 line.len = 0; | |
| 440 line.data = NULL; | |
| 441 #endif | |
| 442 break; | |
| 443 } | |
| 444 | |
| 445 if (c->send(c, line.data, line.len) < (ssize_t) line.len) { | |
| 446 /* | |
| 447 * we treat the incomplete sending as NGX_ERROR | |
| 448 * because it is very strange here | |
| 449 */ | |
| 450 ngx_mail_proxy_internal_server_error(s); | |
| 451 return; | |
| 452 } | |
| 453 | |
| 454 s->proxy->buffer->pos = s->proxy->buffer->start; | |
| 455 s->proxy->buffer->last = s->proxy->buffer->start; | |
| 456 } | |
| 457 | |
| 458 | |
| 459 static void | |
| 460 ngx_mail_proxy_smtp_handler(ngx_event_t *rev) | |
| 461 { | |
| 462 u_char *p; | |
| 463 ngx_int_t rc; | |
| 464 ngx_str_t line; | |
| 465 ngx_connection_t *c; | |
| 466 ngx_mail_session_t *s; | |
| 467 ngx_mail_proxy_conf_t *pcf; | |
| 468 ngx_mail_core_srv_conf_t *cscf; | |
| 469 | |
| 470 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, | |
| 471 "mail proxy smtp auth handler"); | |
| 472 | |
| 473 c = rev->data; | |
| 474 s = c->data; | |
| 475 | |
| 476 if (rev->timedout) { | |
| 477 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, | |
| 478 "upstream timed out"); | |
| 479 c->timedout = 1; | |
| 480 ngx_mail_proxy_internal_server_error(s); | |
| 481 return; | |
| 482 } | |
| 483 | |
| 484 rc = ngx_mail_proxy_read_response(s, s->mail_state); | |
| 485 | |
| 486 if (rc == NGX_AGAIN) { | |
| 487 return; | |
| 488 } | |
| 489 | |
| 490 if (rc == NGX_ERROR) { | |
| 491 ngx_mail_proxy_upstream_error(s); | |
| 492 return; | |
| 493 } | |
| 494 | |
| 495 switch (s->mail_state) { | |
| 496 | |
| 497 case ngx_smtp_start: | |
| 498 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send ehlo"); | |
| 499 | |
| 500 s->connection->log->action = "sending HELO/EHLO to upstream"; | |
| 501 | |
| 502 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| 503 | |
| 504 line.len = sizeof("HELO ") - 1 + cscf->server_name.len + 2; | |
| 505 line.data = ngx_palloc(c->pool, line.len); | |
| 506 if (line.data == NULL) { | |
| 507 ngx_mail_proxy_internal_server_error(s); | |
| 508 return; | |
| 509 } | |
| 510 | |
| 511 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 512 | |
| 513 p = ngx_cpymem(line.data, | |
| 514 ((s->esmtp || pcf->xclient) ? "EHLO " : "HELO "), | |
| 515 sizeof("HELO ") - 1); | |
| 516 | |
| 517 p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len); | |
| 518 *p++ = CR; *p = LF; | |
| 519 | |
|
400
f1e2fab7a46c
Mail: smtp proxy without authentication.
Maxim Dounin <mdounin@mdounin.ru>
parents:
296
diff
changeset
|
520 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
|
521 s->auth_method == NGX_MAIL_AUTH_NONE ? |
|
400
f1e2fab7a46c
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522 ngx_smtp_helo_from : ngx_smtp_helo; |
| 290 | 523 |
| 524 break; | |
| 525 | |
|
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526 case ngx_smtp_helo_xclient: |
| 290 | 527 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, |
| 528 "mail proxy send xclient"); | |
| 529 | |
| 530 s->connection->log->action = "sending XCLIENT to upstream"; | |
| 531 | |
| 532 line.len = sizeof("XCLIENT PROTO=SMTP HELO= ADDR= LOGIN= " | |
| 533 "NAME=[UNAVAILABLE]" CRLF) - 1 | |
| 534 + s->esmtp + s->smtp_helo.len | |
| 535 + s->connection->addr_text.len + s->login.len; | |
| 536 | |
| 537 line.data = ngx_palloc(c->pool, line.len); | |
| 538 if (line.data == NULL) { | |
| 539 ngx_mail_proxy_internal_server_error(s); | |
| 540 return; | |
| 541 } | |
| 542 | |
|
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543 line.len = ngx_sprintf(line.data, |
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544 "XCLIENT PROTO=%sSMTP%s%V ADDR=%V%s%V " |
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545 "NAME=[UNAVAILABLE]" CRLF, |
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546 (s->esmtp ? "E" : ""), |
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547 (s->smtp_helo.len ? " HELO=" : ""), &s->smtp_helo, |
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548 &s->connection->addr_text, |
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549 (s->login.len ? " LOGIN=" : ""), &s->login) |
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550 - line.data; |
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551 |
|
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552 s->mail_state = s->auth_method == NGX_MAIL_AUTH_NONE ? |
|
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553 ngx_smtp_xclient_from : ngx_smtp_xclient; |
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554 |
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555 break; |
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556 |
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557 case ngx_smtp_helo_from: |
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558 case ngx_smtp_xclient_from: |
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559 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, |
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560 "mail proxy send mail from"); |
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561 |
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562 s->connection->log->action = "sending MAIL FROM to upstream"; |
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563 |
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564 line.len = s->smtp_from.len + sizeof(CRLF) - 1; |
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565 line.data = ngx_palloc(c->pool, line.len); |
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566 if (line.data == NULL) { |
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567 ngx_mail_proxy_internal_server_error(s); |
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568 return; |
| 290 | 569 } |
| 570 | |
|
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571 p = ngx_cpymem(line.data, s->smtp_from.data, s->smtp_from.len); |
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572 *p++ = CR; *p = LF; |
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573 |
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574 s->mail_state = ngx_smtp_from; |
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575 |
| 290 | 576 break; |
| 577 | |
|
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578 case ngx_smtp_from: |
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579 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, |
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580 "mail proxy send rcpt to"); |
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581 |
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582 s->connection->log->action = "sending RCPT TO to upstream"; |
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583 |
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584 line.len = s->smtp_to.len + sizeof(CRLF) - 1; |
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585 line.data = ngx_palloc(c->pool, line.len); |
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586 if (line.data == NULL) { |
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587 ngx_mail_proxy_internal_server_error(s); |
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588 return; |
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589 } |
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590 |
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591 p = ngx_cpymem(line.data, s->smtp_to.data, s->smtp_to.len); |
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592 *p++ = CR; *p = LF; |
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593 |
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594 s->mail_state = ngx_smtp_to; |
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595 |
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596 break; |
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597 |
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598 case ngx_smtp_helo: |
| 290 | 599 case ngx_smtp_xclient: |
|
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600 case ngx_smtp_to: |
| 290 | 601 |
|
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602 if (s->auth_method == NGX_MAIL_AUTH_NONE) { |
|
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603 ngx_memcpy(s->proxy->buffer->start, smtp_ok, sizeof(smtp_ok) - 1); |
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604 s->proxy->buffer->last = s->proxy->buffer->start |
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605 + sizeof(smtp_ok) - 1; |
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606 } else { |
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607 ngx_memcpy(s->proxy->buffer->start, smtp_auth_ok, |
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608 sizeof(smtp_auth_ok) - 1); |
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609 s->proxy->buffer->last = s->proxy->buffer->start |
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610 + sizeof(smtp_auth_ok) - 1; |
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611 } |
| 290 | 612 |
| 613 s->proxy->buffer->pos = s->proxy->buffer->start; | |
| 614 | |
| 615 s->connection->read->handler = ngx_mail_proxy_handler; | |
| 616 s->connection->write->handler = ngx_mail_proxy_handler; | |
| 617 rev->handler = ngx_mail_proxy_handler; | |
| 618 c->write->handler = ngx_mail_proxy_handler; | |
| 619 | |
| 620 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 621 ngx_add_timer(s->connection->read, pcf->timeout); | |
| 622 ngx_del_timer(c->read); | |
| 623 | |
| 624 c->log->action = NULL; | |
| 625 ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in"); | |
| 626 | |
| 627 ngx_mail_proxy_handler(s->connection->write); | |
| 628 | |
| 629 return; | |
| 630 | |
| 631 default: | |
| 632 #if (NGX_SUPPRESS_WARN) | |
| 633 line.len = 0; | |
| 634 line.data = NULL; | |
| 635 #endif | |
| 636 break; | |
| 637 } | |
| 638 | |
| 639 if (c->send(c, line.data, line.len) < (ssize_t) line.len) { | |
| 640 /* | |
| 641 * we treat the incomplete sending as NGX_ERROR | |
| 642 * because it is very strange here | |
| 643 */ | |
| 644 ngx_mail_proxy_internal_server_error(s); | |
| 645 return; | |
| 646 } | |
| 647 | |
| 648 s->proxy->buffer->pos = s->proxy->buffer->start; | |
| 649 s->proxy->buffer->last = s->proxy->buffer->start; | |
| 650 } | |
| 651 | |
| 652 | |
| 653 static void | |
| 654 ngx_mail_proxy_dummy_handler(ngx_event_t *wev) | |
| 655 { | |
| 656 ngx_connection_t *c; | |
| 657 ngx_mail_session_t *s; | |
| 658 | |
| 659 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, wev->log, 0, "mail proxy dummy handler"); | |
| 660 | |
| 661 if (ngx_handle_write_event(wev, 0) == NGX_ERROR) { | |
| 662 c = wev->data; | |
| 663 s = c->data; | |
| 664 | |
| 665 ngx_mail_proxy_close_session(s); | |
| 666 } | |
| 667 } | |
| 668 | |
| 669 | |
| 670 static ngx_int_t | |
| 671 ngx_mail_proxy_read_response(ngx_mail_session_t *s, ngx_uint_t state) | |
| 672 { | |
| 673 u_char *p; | |
| 674 ssize_t n; | |
| 675 ngx_buf_t *b; | |
| 676 ngx_mail_proxy_conf_t *pcf; | |
| 677 | |
| 678 s->connection->log->action = "reading response from upstream"; | |
| 679 | |
| 680 b = s->proxy->buffer; | |
| 681 | |
| 682 n = s->proxy->upstream.connection->recv(s->proxy->upstream.connection, | |
| 683 b->last, b->end - b->last); | |
| 684 | |
| 685 if (n == NGX_ERROR || n == 0) { | |
| 686 return NGX_ERROR; | |
| 687 } | |
| 688 | |
| 689 if (n == NGX_AGAIN) { | |
| 690 return NGX_AGAIN; | |
| 691 } | |
| 692 | |
| 693 b->last += n; | |
| 694 | |
| 695 if (b->last - b->pos < 5) { | |
| 696 return NGX_AGAIN; | |
| 697 } | |
| 698 | |
| 699 if (*(b->last - 2) != CR || *(b->last - 1) != LF) { | |
| 700 if (b->last == b->end) { | |
| 701 *(b->last - 1) = '\0'; | |
| 702 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0, | |
| 703 "upstream sent too long response line: \"%s\"", | |
| 704 b->pos); | |
| 705 return NGX_ERROR; | |
| 706 } | |
| 707 | |
| 708 return NGX_AGAIN; | |
| 709 } | |
| 710 | |
| 711 p = b->pos; | |
| 712 | |
| 713 switch (s->protocol) { | |
| 714 | |
| 715 case NGX_MAIL_POP3_PROTOCOL: | |
| 716 if (p[0] == '+' && p[1] == 'O' && p[2] == 'K') { | |
| 717 return NGX_OK; | |
| 718 } | |
| 719 break; | |
| 720 | |
| 721 case NGX_MAIL_IMAP_PROTOCOL: | |
| 722 switch (state) { | |
| 723 | |
| 724 case ngx_imap_start: | |
| 725 if (p[0] == '*' && p[1] == ' ' && p[2] == 'O' && p[3] == 'K') { | |
| 726 return NGX_OK; | |
| 727 } | |
| 728 break; | |
| 729 | |
| 730 case ngx_imap_login: | |
| 731 case ngx_imap_user: | |
| 732 if (p[0] == '+') { | |
| 733 return NGX_OK; | |
| 734 } | |
| 735 break; | |
| 736 | |
| 737 case ngx_imap_passwd: | |
| 738 if (ngx_strncmp(p, s->tag.data, s->tag.len) == 0) { | |
| 739 p += s->tag.len; | |
| 740 if (p[0] == 'O' && p[1] == 'K') { | |
| 741 return NGX_OK; | |
| 742 } | |
| 743 } | |
| 744 break; | |
| 745 } | |
| 746 | |
| 747 break; | |
| 748 | |
| 749 default: /* NGX_MAIL_SMTP_PROTOCOL */ | |
| 750 switch (state) { | |
| 751 | |
| 752 case ngx_smtp_helo: | |
|
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753 case ngx_smtp_helo_from: |
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754 case ngx_smtp_helo_xclient: |
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755 case ngx_smtp_from: |
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756 case ngx_smtp_to: |
| 296 | 757 if (p[0] == '2' && p[1] == '5' && p[2] == '0') { |
| 758 return NGX_OK; | |
| 759 } | |
| 760 break; | |
| 290 | 761 |
| 762 case ngx_smtp_start: | |
|
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763 if (p[0] == '2' && p[1] == '2' && p[2] == '0') { |
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764 return NGX_OK; |
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765 } |
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766 break; |
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767 |
| 290 | 768 case ngx_smtp_xclient: |
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769 case ngx_smtp_xclient_from: |
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770 if (p[0] == '2' && (p[1] == '2' || p[1] == '5') && p[2] == '0') { |
| 296 | 771 return NGX_OK; |
| 772 } | |
| 773 break; | |
| 290 | 774 } |
| 775 | |
| 296 | 776 break; |
| 290 | 777 } |
| 778 | |
| 779 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 780 | |
| 781 if (pcf->pass_error_message == 0) { | |
| 782 *(b->last - 2) = '\0'; | |
| 783 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0, | |
| 784 "upstream sent invalid response: \"%s\"", p); | |
| 785 return NGX_ERROR; | |
| 786 } | |
| 787 | |
| 788 s->out.len = b->last - p - 2; | |
| 789 s->out.data = p; | |
| 790 | |
| 791 ngx_log_error(NGX_LOG_INFO, s->connection->log, 0, | |
| 792 "upstream sent invalid response: \"%V\"", &s->out); | |
| 793 | |
| 794 s->out.len = b->last - b->pos; | |
| 795 s->out.data = b->pos; | |
| 796 | |
| 797 return NGX_ERROR; | |
| 798 } | |
| 799 | |
| 800 | |
| 801 static void | |
| 802 ngx_mail_proxy_handler(ngx_event_t *ev) | |
| 803 { | |
| 804 char *action, *recv_action, *send_action; | |
| 805 size_t size; | |
| 806 ssize_t n; | |
| 807 ngx_buf_t *b; | |
| 808 ngx_uint_t do_write; | |
| 809 ngx_connection_t *c, *src, *dst; | |
| 810 ngx_mail_session_t *s; | |
| 811 ngx_mail_proxy_conf_t *pcf; | |
| 812 | |
| 813 c = ev->data; | |
| 814 s = c->data; | |
| 815 | |
| 816 if (ev->timedout) { | |
| 817 c->log->action = "proxying"; | |
| 818 | |
| 819 if (c == s->connection) { | |
| 820 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, | |
| 821 "client timed out"); | |
| 822 c->timedout = 1; | |
| 823 | |
| 824 } else { | |
| 825 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, | |
| 826 "upstream timed out"); | |
| 827 } | |
| 828 | |
| 829 ngx_mail_proxy_close_session(s); | |
| 830 return; | |
| 831 } | |
| 832 | |
| 833 if (c == s->connection) { | |
| 834 if (ev->write) { | |
| 835 recv_action = "proxying and reading from upstream"; | |
| 836 send_action = "proxying and sending to client"; | |
| 837 src = s->proxy->upstream.connection; | |
| 838 dst = c; | |
| 839 b = s->proxy->buffer; | |
| 840 | |
| 841 } else { | |
| 842 recv_action = "proxying and reading from client"; | |
| 843 send_action = "proxying and sending to upstream"; | |
| 844 src = c; | |
| 845 dst = s->proxy->upstream.connection; | |
| 846 b = s->buffer; | |
| 847 } | |
| 848 | |
| 849 } else { | |
| 850 if (ev->write) { | |
| 851 recv_action = "proxying and reading from client"; | |
| 852 send_action = "proxying and sending to upstream"; | |
| 853 src = s->connection; | |
| 854 dst = c; | |
| 855 b = s->buffer; | |
| 856 | |
| 857 } else { | |
| 858 recv_action = "proxying and reading from upstream"; | |
| 859 send_action = "proxying and sending to client"; | |
| 860 src = c; | |
| 861 dst = s->connection; | |
| 862 b = s->proxy->buffer; | |
| 863 } | |
| 864 } | |
| 865 | |
| 866 do_write = ev->write ? 1 : 0; | |
| 867 | |
| 868 ngx_log_debug3(NGX_LOG_DEBUG_MAIL, ev->log, 0, | |
| 869 "mail proxy handler: %d, #%d > #%d", | |
| 870 do_write, src->fd, dst->fd); | |
| 871 | |
| 872 for ( ;; ) { | |
| 873 | |
| 874 if (do_write) { | |
| 875 | |
| 876 size = b->last - b->pos; | |
| 877 | |
| 878 if (size && dst->write->ready) { | |
| 879 c->log->action = send_action; | |
| 880 | |
| 881 n = dst->send(dst, b->pos, size); | |
| 882 | |
| 883 if (n == NGX_ERROR) { | |
| 884 ngx_mail_proxy_close_session(s); | |
| 885 return; | |
| 886 } | |
| 887 | |
| 888 if (n > 0) { | |
| 889 b->pos += n; | |
| 890 | |
| 891 if (b->pos == b->last) { | |
| 892 b->pos = b->start; | |
| 893 b->last = b->start; | |
| 894 } | |
| 895 } | |
| 896 } | |
| 897 } | |
| 898 | |
| 899 size = b->end - b->last; | |
| 900 | |
| 901 if (size && src->read->ready) { | |
| 902 c->log->action = recv_action; | |
| 903 | |
| 904 n = src->recv(src, b->last, size); | |
| 905 | |
| 906 if (n == NGX_AGAIN || n == 0) { | |
| 907 break; | |
| 908 } | |
| 909 | |
| 910 if (n > 0) { | |
| 911 do_write = 1; | |
| 912 b->last += n; | |
| 913 | |
| 914 continue; | |
| 915 } | |
| 916 | |
| 917 if (n == NGX_ERROR) { | |
| 918 src->read->eof = 1; | |
| 919 } | |
| 920 } | |
| 921 | |
| 922 break; | |
| 923 } | |
| 924 | |
| 925 c->log->action = "proxying"; | |
| 926 | |
| 324 | 927 if ((s->connection->read->eof && s->buffer->pos == s->buffer->last) |
| 928 || (s->proxy->upstream.connection->read->eof | |
| 929 && s->proxy->buffer->pos == s->proxy->buffer->last) | |
| 930 || (s->connection->read->eof | |
| 931 && s->proxy->upstream.connection->read->eof)) | |
| 290 | 932 { |
| 933 action = c->log->action; | |
| 934 c->log->action = NULL; | |
| 935 ngx_log_error(NGX_LOG_INFO, c->log, 0, "proxied session done"); | |
| 936 c->log->action = action; | |
| 937 | |
| 938 ngx_mail_proxy_close_session(s); | |
| 939 return; | |
| 940 } | |
| 941 | |
| 942 if (ngx_handle_write_event(dst->write, 0) == NGX_ERROR) { | |
| 943 ngx_mail_proxy_close_session(s); | |
| 944 return; | |
| 945 } | |
| 946 | |
| 947 if (ngx_handle_read_event(dst->read, 0) == NGX_ERROR) { | |
| 948 ngx_mail_proxy_close_session(s); | |
| 949 return; | |
| 950 } | |
| 951 | |
| 952 if (ngx_handle_write_event(src->write, 0) == NGX_ERROR) { | |
| 953 ngx_mail_proxy_close_session(s); | |
| 954 return; | |
| 955 } | |
| 956 | |
| 957 if (ngx_handle_read_event(src->read, 0) == NGX_ERROR) { | |
| 958 ngx_mail_proxy_close_session(s); | |
| 959 return; | |
| 960 } | |
| 961 | |
| 962 if (c == s->connection) { | |
| 963 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 964 ngx_add_timer(c->read, pcf->timeout); | |
| 965 } | |
| 966 } | |
| 967 | |
| 968 | |
| 969 static void | |
| 970 ngx_mail_proxy_upstream_error(ngx_mail_session_t *s) | |
| 971 { | |
| 972 if (s->proxy->upstream.connection) { | |
| 973 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0, | |
| 974 "close mail proxy connection: %d", | |
| 975 s->proxy->upstream.connection->fd); | |
| 976 | |
| 977 ngx_close_connection(s->proxy->upstream.connection); | |
| 978 } | |
| 979 | |
| 980 if (s->out.len == 0) { | |
| 981 ngx_mail_session_internal_server_error(s); | |
| 982 return; | |
| 983 } | |
| 984 | |
| 985 s->quit = 1; | |
| 986 ngx_mail_send(s->connection->write); | |
| 987 } | |
| 988 | |
| 989 | |
| 990 static void | |
| 991 ngx_mail_proxy_internal_server_error(ngx_mail_session_t *s) | |
| 992 { | |
| 993 if (s->proxy->upstream.connection) { | |
| 994 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0, | |
| 995 "close mail proxy connection: %d", | |
| 996 s->proxy->upstream.connection->fd); | |
| 997 | |
| 998 ngx_close_connection(s->proxy->upstream.connection); | |
| 999 } | |
| 1000 | |
| 1001 ngx_mail_session_internal_server_error(s); | |
| 1002 } | |
| 1003 | |
| 1004 | |
| 1005 static void | |
| 1006 ngx_mail_proxy_close_session(ngx_mail_session_t *s) | |
| 1007 { | |
| 1008 if (s->proxy->upstream.connection) { | |
| 1009 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0, | |
| 1010 "close mail proxy connection: %d", | |
| 1011 s->proxy->upstream.connection->fd); | |
| 1012 | |
| 1013 ngx_close_connection(s->proxy->upstream.connection); | |
| 1014 } | |
| 1015 | |
| 1016 ngx_mail_close_connection(s->connection); | |
| 1017 } | |
| 1018 | |
| 1019 | |
| 1020 static void * | |
| 1021 ngx_mail_proxy_create_conf(ngx_conf_t *cf) | |
| 1022 { | |
| 1023 ngx_mail_proxy_conf_t *pcf; | |
| 1024 | |
| 1025 pcf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_proxy_conf_t)); | |
| 1026 if (pcf == NULL) { | |
| 1027 return NGX_CONF_ERROR; | |
| 1028 } | |
| 1029 | |
| 1030 pcf->enable = NGX_CONF_UNSET; | |
| 1031 pcf->pass_error_message = NGX_CONF_UNSET; | |
| 1032 pcf->xclient = NGX_CONF_UNSET; | |
| 1033 pcf->buffer_size = NGX_CONF_UNSET_SIZE; | |
| 1034 pcf->timeout = NGX_CONF_UNSET_MSEC; | |
| 1035 | |
| 1036 return pcf; | |
| 1037 } | |
| 1038 | |
| 1039 | |
| 1040 static char * | |
| 1041 ngx_mail_proxy_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 1042 { | |
| 1043 ngx_mail_proxy_conf_t *prev = parent; | |
| 1044 ngx_mail_proxy_conf_t *conf = child; | |
| 1045 | |
| 1046 ngx_conf_merge_value(conf->enable, prev->enable, 0); | |
| 1047 ngx_conf_merge_value(conf->pass_error_message, prev->pass_error_message, 0); | |
| 1048 ngx_conf_merge_value(conf->xclient, prev->xclient, 1); | |
| 1049 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size, | |
| 1050 (size_t) ngx_pagesize); | |
| 1051 ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 24 * 60 * 60000); | |
| 1052 | |
| 1053 return NGX_CONF_OK; | |
| 1054 } |