Mercurial > hg > nginx-mail
annotate src/mail/ngx_mail_proxy_module.c @ 410:cd9cb7a3ff9e
Merge with nginx 0.7.8.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Mon, 11 Aug 2008 22:07:06 +0400 |
| parents | 52b28d322d76 984bb0b1399b |
| children | 375518f786db |
| 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 | |
|
400
f1e2fab7a46c
Mail: smtp proxy without authentication.
Maxim Dounin <mdounin@mdounin.ru>
parents:
296
diff
changeset
|
107 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
|
108 static u_char smtp_ok[] = "250 2.0.0 OK" CRLF; |
| 290 | 109 |
| 110 | |
| 111 void | |
| 112 ngx_mail_proxy_init(ngx_mail_session_t *s, ngx_peer_addr_t *peer) | |
| 113 { | |
| 114 int keepalive; | |
| 115 ngx_int_t rc; | |
| 116 ngx_mail_proxy_ctx_t *p; | |
| 117 ngx_mail_proxy_conf_t *pcf; | |
| 118 ngx_mail_core_srv_conf_t *cscf; | |
| 119 | |
| 120 s->connection->log->action = "connecting to upstream"; | |
| 121 | |
| 122 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| 123 | |
| 124 if (cscf->so_keepalive) { | |
| 125 keepalive = 1; | |
| 126 | |
| 127 if (setsockopt(s->connection->fd, SOL_SOCKET, SO_KEEPALIVE, | |
| 128 (const void *) &keepalive, sizeof(int)) | |
| 129 == -1) | |
| 130 { | |
| 131 ngx_log_error(NGX_LOG_ALERT, s->connection->log, ngx_socket_errno, | |
| 132 "setsockopt(SO_KEEPALIVE) failed"); | |
| 133 } | |
| 134 } | |
| 135 | |
| 136 p = ngx_pcalloc(s->connection->pool, sizeof(ngx_mail_proxy_ctx_t)); | |
| 137 if (p == NULL) { | |
| 138 ngx_mail_session_internal_server_error(s); | |
| 139 return; | |
| 140 } | |
| 141 | |
| 142 s->proxy = p; | |
| 143 | |
| 144 p->upstream.sockaddr = peer->sockaddr; | |
| 145 p->upstream.socklen = peer->socklen; | |
| 146 p->upstream.name = &peer->name; | |
| 147 p->upstream.get = ngx_event_get_peer; | |
| 148 p->upstream.log = s->connection->log; | |
| 149 p->upstream.log_error = NGX_ERROR_ERR; | |
| 150 | |
| 151 rc = ngx_event_connect_peer(&p->upstream); | |
| 152 | |
| 153 if (rc == NGX_ERROR || rc == NGX_BUSY || rc == NGX_DECLINED) { | |
| 154 ngx_mail_proxy_internal_server_error(s); | |
| 155 return; | |
| 156 } | |
| 157 | |
| 158 ngx_add_timer(p->upstream.connection->read, cscf->timeout); | |
| 159 | |
| 160 p->upstream.connection->data = s; | |
| 161 p->upstream.connection->pool = s->connection->pool; | |
| 162 | |
| 163 s->connection->read->handler = ngx_mail_proxy_block_read; | |
| 164 p->upstream.connection->write->handler = ngx_mail_proxy_dummy_handler; | |
| 165 | |
| 166 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 167 | |
| 168 s->proxy->buffer = ngx_create_temp_buf(s->connection->pool, | |
| 169 pcf->buffer_size); | |
| 170 if (s->proxy->buffer == NULL) { | |
| 171 ngx_mail_proxy_internal_server_error(s); | |
| 172 return; | |
| 173 } | |
| 174 | |
| 372 | 175 s->out.len = 0; |
| 176 | |
| 290 | 177 switch (s->protocol) { |
| 178 | |
| 179 case NGX_MAIL_POP3_PROTOCOL: | |
| 180 p->upstream.connection->read->handler = ngx_mail_proxy_pop3_handler; | |
| 181 s->mail_state = ngx_pop3_start; | |
| 182 break; | |
| 183 | |
| 184 case NGX_MAIL_IMAP_PROTOCOL: | |
| 185 p->upstream.connection->read->handler = ngx_mail_proxy_imap_handler; | |
| 186 s->mail_state = ngx_imap_start; | |
| 187 break; | |
| 188 | |
| 189 default: /* NGX_MAIL_SMTP_PROTOCOL */ | |
| 190 p->upstream.connection->read->handler = ngx_mail_proxy_smtp_handler; | |
| 191 s->mail_state = ngx_smtp_start; | |
| 192 break; | |
| 193 } | |
| 194 } | |
| 195 | |
| 196 | |
| 197 static void | |
| 198 ngx_mail_proxy_block_read(ngx_event_t *rev) | |
| 199 { | |
| 200 ngx_connection_t *c; | |
| 201 ngx_mail_session_t *s; | |
| 202 | |
| 203 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy block read"); | |
| 204 | |
| 205 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) { | |
| 206 c = rev->data; | |
| 207 s = c->data; | |
| 208 | |
| 209 ngx_mail_proxy_close_session(s); | |
| 210 } | |
| 211 } | |
| 212 | |
| 213 | |
| 214 static void | |
| 215 ngx_mail_proxy_pop3_handler(ngx_event_t *rev) | |
| 216 { | |
| 217 u_char *p; | |
| 218 ngx_int_t rc; | |
| 219 ngx_str_t line; | |
| 220 ngx_connection_t *c; | |
| 221 ngx_mail_session_t *s; | |
| 222 ngx_mail_proxy_conf_t *pcf; | |
| 223 | |
| 224 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, | |
| 225 "mail proxy pop3 auth handler"); | |
| 226 | |
| 227 c = rev->data; | |
| 228 s = c->data; | |
| 229 | |
| 230 if (rev->timedout) { | |
| 231 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, | |
| 232 "upstream timed out"); | |
| 233 c->timedout = 1; | |
| 234 ngx_mail_proxy_internal_server_error(s); | |
| 235 return; | |
| 236 } | |
| 237 | |
| 238 rc = ngx_mail_proxy_read_response(s, 0); | |
| 239 | |
| 240 if (rc == NGX_AGAIN) { | |
| 241 return; | |
| 242 } | |
| 243 | |
| 244 if (rc == NGX_ERROR) { | |
| 245 ngx_mail_proxy_upstream_error(s); | |
| 246 return; | |
| 247 } | |
| 248 | |
| 249 switch (s->mail_state) { | |
| 250 | |
| 251 case ngx_pop3_start: | |
| 252 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send user"); | |
| 253 | |
| 254 s->connection->log->action = "sending user name to upstream"; | |
| 255 | |
| 256 line.len = sizeof("USER ") - 1 + s->login.len + 2; | |
| 382 | 257 line.data = ngx_pnalloc(c->pool, line.len); |
| 290 | 258 if (line.data == NULL) { |
| 259 ngx_mail_proxy_internal_server_error(s); | |
| 260 return; | |
| 261 } | |
| 262 | |
| 263 p = ngx_cpymem(line.data, "USER ", sizeof("USER ") - 1); | |
| 264 p = ngx_cpymem(p, s->login.data, s->login.len); | |
| 265 *p++ = CR; *p = LF; | |
| 266 | |
| 267 s->mail_state = ngx_pop3_user; | |
| 268 break; | |
| 269 | |
| 270 case ngx_pop3_user: | |
| 271 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send pass"); | |
| 272 | |
| 273 s->connection->log->action = "sending password to upstream"; | |
| 274 | |
| 275 line.len = sizeof("PASS ") - 1 + s->passwd.len + 2; | |
| 382 | 276 line.data = ngx_pnalloc(c->pool, line.len); |
| 290 | 277 if (line.data == NULL) { |
| 278 ngx_mail_proxy_internal_server_error(s); | |
| 279 return; | |
| 280 } | |
| 281 | |
| 282 p = ngx_cpymem(line.data, "PASS ", sizeof("PASS ") - 1); | |
| 283 p = ngx_cpymem(p, s->passwd.data, s->passwd.len); | |
| 284 *p++ = CR; *p = LF; | |
| 285 | |
| 286 s->mail_state = ngx_pop3_passwd; | |
| 287 break; | |
| 288 | |
| 289 case ngx_pop3_passwd: | |
| 290 s->connection->read->handler = ngx_mail_proxy_handler; | |
| 291 s->connection->write->handler = ngx_mail_proxy_handler; | |
| 292 rev->handler = ngx_mail_proxy_handler; | |
| 293 c->write->handler = ngx_mail_proxy_handler; | |
| 294 | |
| 295 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 296 ngx_add_timer(s->connection->read, pcf->timeout); | |
| 297 ngx_del_timer(c->read); | |
| 298 | |
| 299 c->log->action = NULL; | |
| 300 ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in"); | |
| 301 | |
| 302 ngx_mail_proxy_handler(s->connection->write); | |
| 303 | |
| 304 return; | |
| 305 | |
| 306 default: | |
| 307 #if (NGX_SUPPRESS_WARN) | |
| 308 line.len = 0; | |
| 309 line.data = NULL; | |
| 310 #endif | |
| 311 break; | |
| 312 } | |
| 313 | |
| 314 if (c->send(c, line.data, line.len) < (ssize_t) line.len) { | |
| 315 /* | |
| 316 * we treat the incomplete sending as NGX_ERROR | |
| 317 * because it is very strange here | |
| 318 */ | |
| 319 ngx_mail_proxy_internal_server_error(s); | |
| 320 return; | |
| 321 } | |
| 322 | |
| 323 s->proxy->buffer->pos = s->proxy->buffer->start; | |
| 324 s->proxy->buffer->last = s->proxy->buffer->start; | |
| 325 } | |
| 326 | |
| 327 | |
| 328 static void | |
| 329 ngx_mail_proxy_imap_handler(ngx_event_t *rev) | |
| 330 { | |
| 331 u_char *p; | |
| 332 ngx_int_t rc; | |
| 333 ngx_str_t line; | |
| 334 ngx_connection_t *c; | |
| 335 ngx_mail_session_t *s; | |
| 336 ngx_mail_proxy_conf_t *pcf; | |
| 337 | |
| 338 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, | |
| 339 "mail proxy imap auth handler"); | |
| 340 | |
| 341 c = rev->data; | |
| 342 s = c->data; | |
| 343 | |
| 344 if (rev->timedout) { | |
| 345 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, | |
| 346 "upstream timed out"); | |
| 347 c->timedout = 1; | |
| 348 ngx_mail_proxy_internal_server_error(s); | |
| 349 return; | |
| 350 } | |
| 351 | |
| 352 rc = ngx_mail_proxy_read_response(s, s->mail_state); | |
| 353 | |
| 354 if (rc == NGX_AGAIN) { | |
| 355 return; | |
| 356 } | |
| 357 | |
| 358 if (rc == NGX_ERROR) { | |
| 359 ngx_mail_proxy_upstream_error(s); | |
| 360 return; | |
| 361 } | |
| 362 | |
| 363 switch (s->mail_state) { | |
| 364 | |
| 365 case ngx_imap_start: | |
| 366 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, | |
| 367 "mail proxy send login"); | |
| 368 | |
| 369 s->connection->log->action = "sending LOGIN command to upstream"; | |
| 370 | |
| 371 line.len = s->tag.len + sizeof("LOGIN ") - 1 | |
| 372 + 1 + NGX_SIZE_T_LEN + 1 + 2; | |
| 382 | 373 line.data = ngx_pnalloc(c->pool, line.len); |
| 290 | 374 if (line.data == NULL) { |
| 375 ngx_mail_proxy_internal_server_error(s); | |
| 376 return; | |
| 377 } | |
| 378 | |
| 379 line.len = ngx_sprintf(line.data, "%VLOGIN {%uz}" CRLF, | |
| 380 &s->tag, s->login.len) | |
| 381 - line.data; | |
| 382 | |
| 383 s->mail_state = ngx_imap_login; | |
| 384 break; | |
| 385 | |
| 386 case ngx_imap_login: | |
| 387 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send user"); | |
| 388 | |
| 389 s->connection->log->action = "sending user name to upstream"; | |
| 390 | |
| 391 line.len = s->login.len + 1 + 1 + NGX_SIZE_T_LEN + 1 + 2; | |
| 382 | 392 line.data = ngx_pnalloc(c->pool, line.len); |
| 290 | 393 if (line.data == NULL) { |
| 394 ngx_mail_proxy_internal_server_error(s); | |
| 395 return; | |
| 396 } | |
| 397 | |
| 398 line.len = ngx_sprintf(line.data, "%V {%uz}" CRLF, | |
| 399 &s->login, s->passwd.len) | |
| 400 - line.data; | |
| 401 | |
| 402 s->mail_state = ngx_imap_user; | |
| 403 break; | |
| 404 | |
| 405 case ngx_imap_user: | |
| 406 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, | |
| 407 "mail proxy send passwd"); | |
| 408 | |
| 409 s->connection->log->action = "sending password to upstream"; | |
| 410 | |
| 411 line.len = s->passwd.len + 2; | |
| 382 | 412 line.data = ngx_pnalloc(c->pool, line.len); |
| 290 | 413 if (line.data == NULL) { |
| 414 ngx_mail_proxy_internal_server_error(s); | |
| 415 return; | |
| 416 } | |
| 417 | |
| 418 p = ngx_cpymem(line.data, s->passwd.data, s->passwd.len); | |
| 419 *p++ = CR; *p = LF; | |
| 420 | |
| 421 s->mail_state = ngx_imap_passwd; | |
| 422 break; | |
| 423 | |
| 424 case ngx_imap_passwd: | |
| 425 s->connection->read->handler = ngx_mail_proxy_handler; | |
| 426 s->connection->write->handler = ngx_mail_proxy_handler; | |
| 427 rev->handler = ngx_mail_proxy_handler; | |
| 428 c->write->handler = ngx_mail_proxy_handler; | |
| 429 | |
| 430 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 431 ngx_add_timer(s->connection->read, pcf->timeout); | |
| 432 ngx_del_timer(c->read); | |
| 433 | |
| 434 c->log->action = NULL; | |
| 435 ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in"); | |
| 436 | |
| 437 ngx_mail_proxy_handler(s->connection->write); | |
| 438 | |
| 439 return; | |
| 440 | |
| 441 default: | |
| 442 #if (NGX_SUPPRESS_WARN) | |
| 443 line.len = 0; | |
| 444 line.data = NULL; | |
| 445 #endif | |
| 446 break; | |
| 447 } | |
| 448 | |
| 449 if (c->send(c, line.data, line.len) < (ssize_t) line.len) { | |
| 450 /* | |
| 451 * we treat the incomplete sending as NGX_ERROR | |
| 452 * because it is very strange here | |
| 453 */ | |
| 454 ngx_mail_proxy_internal_server_error(s); | |
| 455 return; | |
| 456 } | |
| 457 | |
| 458 s->proxy->buffer->pos = s->proxy->buffer->start; | |
| 459 s->proxy->buffer->last = s->proxy->buffer->start; | |
| 460 } | |
| 461 | |
| 462 | |
| 463 static void | |
| 464 ngx_mail_proxy_smtp_handler(ngx_event_t *rev) | |
| 465 { | |
| 466 u_char *p; | |
| 467 ngx_int_t rc; | |
| 468 ngx_str_t line; | |
| 469 ngx_connection_t *c; | |
| 470 ngx_mail_session_t *s; | |
| 471 ngx_mail_proxy_conf_t *pcf; | |
| 472 ngx_mail_core_srv_conf_t *cscf; | |
| 473 | |
| 474 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, | |
| 475 "mail proxy smtp auth handler"); | |
| 476 | |
| 477 c = rev->data; | |
| 478 s = c->data; | |
| 479 | |
| 480 if (rev->timedout) { | |
| 481 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, | |
| 482 "upstream timed out"); | |
| 483 c->timedout = 1; | |
| 484 ngx_mail_proxy_internal_server_error(s); | |
| 485 return; | |
| 486 } | |
| 487 | |
| 488 rc = ngx_mail_proxy_read_response(s, s->mail_state); | |
| 489 | |
| 490 if (rc == NGX_AGAIN) { | |
| 491 return; | |
| 492 } | |
| 493 | |
| 494 if (rc == NGX_ERROR) { | |
| 495 ngx_mail_proxy_upstream_error(s); | |
| 496 return; | |
| 497 } | |
| 498 | |
| 499 switch (s->mail_state) { | |
| 500 | |
| 501 case ngx_smtp_start: | |
| 502 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send ehlo"); | |
| 503 | |
| 504 s->connection->log->action = "sending HELO/EHLO to upstream"; | |
| 505 | |
| 506 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| 507 | |
| 508 line.len = sizeof("HELO ") - 1 + cscf->server_name.len + 2; | |
| 382 | 509 line.data = ngx_pnalloc(c->pool, line.len); |
| 290 | 510 if (line.data == NULL) { |
| 511 ngx_mail_proxy_internal_server_error(s); | |
| 512 return; | |
| 513 } | |
| 514 | |
| 515 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 516 | |
| 517 p = ngx_cpymem(line.data, | |
| 518 ((s->esmtp || pcf->xclient) ? "EHLO " : "HELO "), | |
| 519 sizeof("HELO ") - 1); | |
| 520 | |
| 521 p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len); | |
| 522 *p++ = CR; *p = LF; | |
| 523 | |
|
400
f1e2fab7a46c
Mail: smtp proxy without authentication.
Maxim Dounin <mdounin@mdounin.ru>
parents:
296
diff
changeset
|
524 s->mail_state = pcf->xclient ? ngx_smtp_helo_xclient : |
|
404
481e8f936572
Mail: rename "unauth" to "none".
Maxim Dounin <mdounin@mdounin.ru>
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525 s->auth_method == NGX_MAIL_AUTH_NONE ? |
|
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526 ngx_smtp_helo_from : ngx_smtp_helo; |
| 290 | 527 |
| 528 break; | |
| 529 | |
|
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530 case ngx_smtp_helo_xclient: |
| 290 | 531 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, |
| 532 "mail proxy send xclient"); | |
| 533 | |
| 534 s->connection->log->action = "sending XCLIENT to upstream"; | |
| 535 | |
| 366 | 536 line.len = sizeof("XCLIENT PROTO=SMTP HELO= ADDR= LOGIN= NAME=" |
| 537 CRLF) - 1 | |
| 290 | 538 + s->esmtp + s->smtp_helo.len |
| 366 | 539 + s->connection->addr_text.len + s->login.len + s->host.len; |
| 290 | 540 |
| 382 | 541 line.data = ngx_pnalloc(c->pool, line.len); |
| 290 | 542 if (line.data == NULL) { |
| 543 ngx_mail_proxy_internal_server_error(s); | |
| 544 return; | |
| 545 } | |
| 546 | |
|
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547 line.len = ngx_sprintf(line.data, |
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548 "XCLIENT PROTO=%sSMTP%s%V ADDR=%V%s%V " |
| 410 | 549 "NAME=%V" CRLF, |
|
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550 (s->esmtp ? "E" : ""), |
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551 (s->smtp_helo.len ? " HELO=" : ""), &s->smtp_helo, |
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552 &s->connection->addr_text, |
| 410 | 553 (s->login.len ? " LOGIN=" : ""), &s->login, &s->host) |
|
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554 - line.data; |
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555 |
|
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556 s->mail_state = s->auth_method == NGX_MAIL_AUTH_NONE ? |
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557 ngx_smtp_xclient_from : ngx_smtp_xclient; |
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558 |
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559 break; |
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560 |
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561 case ngx_smtp_helo_from: |
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562 case ngx_smtp_xclient_from: |
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563 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, |
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564 "mail proxy send mail from"); |
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565 |
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566 s->connection->log->action = "sending MAIL FROM to upstream"; |
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567 |
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568 line.len = s->smtp_from.len + sizeof(CRLF) - 1; |
| 410 | 569 line.data = ngx_pnalloc(c->pool, line.len); |
|
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570 if (line.data == NULL) { |
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571 ngx_mail_proxy_internal_server_error(s); |
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572 return; |
| 290 | 573 } |
| 574 | |
|
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575 p = ngx_cpymem(line.data, s->smtp_from.data, s->smtp_from.len); |
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576 *p++ = CR; *p = LF; |
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577 |
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578 s->mail_state = ngx_smtp_from; |
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579 |
| 290 | 580 break; |
| 581 | |
|
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582 case ngx_smtp_from: |
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583 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, |
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584 "mail proxy send rcpt to"); |
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585 |
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586 s->connection->log->action = "sending RCPT TO to upstream"; |
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587 |
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588 line.len = s->smtp_to.len + sizeof(CRLF) - 1; |
| 410 | 589 line.data = ngx_pnalloc(c->pool, line.len); |
|
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590 if (line.data == NULL) { |
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591 ngx_mail_proxy_internal_server_error(s); |
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592 return; |
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593 } |
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594 |
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595 p = ngx_cpymem(line.data, s->smtp_to.data, s->smtp_to.len); |
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596 *p++ = CR; *p = LF; |
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597 |
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598 s->mail_state = ngx_smtp_to; |
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599 |
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600 break; |
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601 |
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602 case ngx_smtp_helo: |
| 290 | 603 case ngx_smtp_xclient: |
|
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604 case ngx_smtp_to: |
| 290 | 605 |
|
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606 if (s->auth_method == NGX_MAIL_AUTH_NONE) { |
|
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607 ngx_memcpy(s->proxy->buffer->start, smtp_ok, 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; |
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610 } else { |
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611 ngx_memcpy(s->proxy->buffer->start, smtp_auth_ok, |
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612 sizeof(smtp_auth_ok) - 1); |
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613 s->proxy->buffer->last = s->proxy->buffer->start |
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614 + sizeof(smtp_auth_ok) - 1; |
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615 } |
| 290 | 616 |
| 617 s->proxy->buffer->pos = s->proxy->buffer->start; | |
| 618 | |
| 619 s->connection->read->handler = ngx_mail_proxy_handler; | |
| 620 s->connection->write->handler = ngx_mail_proxy_handler; | |
| 621 rev->handler = ngx_mail_proxy_handler; | |
| 622 c->write->handler = ngx_mail_proxy_handler; | |
| 623 | |
| 624 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 625 ngx_add_timer(s->connection->read, pcf->timeout); | |
| 626 ngx_del_timer(c->read); | |
| 627 | |
| 628 c->log->action = NULL; | |
| 629 ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in"); | |
| 630 | |
| 631 ngx_mail_proxy_handler(s->connection->write); | |
| 632 | |
| 633 return; | |
| 634 | |
| 635 default: | |
| 636 #if (NGX_SUPPRESS_WARN) | |
| 637 line.len = 0; | |
| 638 line.data = NULL; | |
| 639 #endif | |
| 640 break; | |
| 641 } | |
| 642 | |
| 643 if (c->send(c, line.data, line.len) < (ssize_t) line.len) { | |
| 644 /* | |
| 645 * we treat the incomplete sending as NGX_ERROR | |
| 646 * because it is very strange here | |
| 647 */ | |
| 648 ngx_mail_proxy_internal_server_error(s); | |
| 649 return; | |
| 650 } | |
| 651 | |
| 652 s->proxy->buffer->pos = s->proxy->buffer->start; | |
| 653 s->proxy->buffer->last = s->proxy->buffer->start; | |
| 654 } | |
| 655 | |
| 656 | |
| 657 static void | |
| 658 ngx_mail_proxy_dummy_handler(ngx_event_t *wev) | |
| 659 { | |
| 660 ngx_connection_t *c; | |
| 661 ngx_mail_session_t *s; | |
| 662 | |
| 663 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, wev->log, 0, "mail proxy dummy handler"); | |
| 664 | |
| 665 if (ngx_handle_write_event(wev, 0) == NGX_ERROR) { | |
| 666 c = wev->data; | |
| 667 s = c->data; | |
| 668 | |
| 669 ngx_mail_proxy_close_session(s); | |
| 670 } | |
| 671 } | |
| 672 | |
| 673 | |
| 674 static ngx_int_t | |
| 675 ngx_mail_proxy_read_response(ngx_mail_session_t *s, ngx_uint_t state) | |
| 676 { | |
| 677 u_char *p; | |
| 678 ssize_t n; | |
| 679 ngx_buf_t *b; | |
| 680 ngx_mail_proxy_conf_t *pcf; | |
| 681 | |
| 682 s->connection->log->action = "reading response from upstream"; | |
| 683 | |
| 684 b = s->proxy->buffer; | |
| 685 | |
| 686 n = s->proxy->upstream.connection->recv(s->proxy->upstream.connection, | |
| 687 b->last, b->end - b->last); | |
| 688 | |
| 689 if (n == NGX_ERROR || n == 0) { | |
| 690 return NGX_ERROR; | |
| 691 } | |
| 692 | |
| 693 if (n == NGX_AGAIN) { | |
| 694 return NGX_AGAIN; | |
| 695 } | |
| 696 | |
| 697 b->last += n; | |
| 698 | |
| 699 if (b->last - b->pos < 5) { | |
| 700 return NGX_AGAIN; | |
| 701 } | |
| 702 | |
| 703 if (*(b->last - 2) != CR || *(b->last - 1) != LF) { | |
| 704 if (b->last == b->end) { | |
| 705 *(b->last - 1) = '\0'; | |
| 706 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0, | |
| 707 "upstream sent too long response line: \"%s\"", | |
| 708 b->pos); | |
| 709 return NGX_ERROR; | |
| 710 } | |
| 711 | |
| 712 return NGX_AGAIN; | |
| 713 } | |
| 714 | |
| 715 p = b->pos; | |
| 716 | |
| 717 switch (s->protocol) { | |
| 718 | |
| 719 case NGX_MAIL_POP3_PROTOCOL: | |
| 720 if (p[0] == '+' && p[1] == 'O' && p[2] == 'K') { | |
| 721 return NGX_OK; | |
| 722 } | |
| 723 break; | |
| 724 | |
| 725 case NGX_MAIL_IMAP_PROTOCOL: | |
| 726 switch (state) { | |
| 727 | |
| 728 case ngx_imap_start: | |
| 729 if (p[0] == '*' && p[1] == ' ' && p[2] == 'O' && p[3] == 'K') { | |
| 730 return NGX_OK; | |
| 731 } | |
| 732 break; | |
| 733 | |
| 734 case ngx_imap_login: | |
| 735 case ngx_imap_user: | |
| 736 if (p[0] == '+') { | |
| 737 return NGX_OK; | |
| 738 } | |
| 739 break; | |
| 740 | |
| 741 case ngx_imap_passwd: | |
| 742 if (ngx_strncmp(p, s->tag.data, s->tag.len) == 0) { | |
| 743 p += s->tag.len; | |
| 744 if (p[0] == 'O' && p[1] == 'K') { | |
| 745 return NGX_OK; | |
| 746 } | |
| 747 } | |
| 748 break; | |
| 749 } | |
| 750 | |
| 751 break; | |
| 752 | |
| 753 default: /* NGX_MAIL_SMTP_PROTOCOL */ | |
| 754 switch (state) { | |
| 755 | |
| 756 case ngx_smtp_helo: | |
|
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757 case ngx_smtp_helo_from: |
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758 case ngx_smtp_helo_xclient: |
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759 case ngx_smtp_from: |
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760 case ngx_smtp_to: |
| 296 | 761 if (p[0] == '2' && p[1] == '5' && p[2] == '0') { |
| 762 return NGX_OK; | |
| 763 } | |
| 764 break; | |
| 290 | 765 |
| 766 case ngx_smtp_start: | |
|
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767 if (p[0] == '2' && p[1] == '2' && p[2] == '0') { |
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768 return NGX_OK; |
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769 } |
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770 break; |
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771 |
| 290 | 772 case ngx_smtp_xclient: |
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773 case ngx_smtp_xclient_from: |
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774 if (p[0] == '2' && (p[1] == '2' || p[1] == '5') && p[2] == '0') { |
| 296 | 775 return NGX_OK; |
| 776 } | |
| 777 break; | |
| 290 | 778 } |
| 779 | |
| 296 | 780 break; |
| 290 | 781 } |
| 782 | |
| 783 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 784 | |
| 785 if (pcf->pass_error_message == 0) { | |
| 786 *(b->last - 2) = '\0'; | |
| 787 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0, | |
| 788 "upstream sent invalid response: \"%s\"", p); | |
| 789 return NGX_ERROR; | |
| 790 } | |
| 791 | |
| 792 s->out.len = b->last - p - 2; | |
| 793 s->out.data = p; | |
| 794 | |
| 795 ngx_log_error(NGX_LOG_INFO, s->connection->log, 0, | |
| 796 "upstream sent invalid response: \"%V\"", &s->out); | |
| 797 | |
| 798 s->out.len = b->last - b->pos; | |
| 799 s->out.data = b->pos; | |
| 800 | |
| 801 return NGX_ERROR; | |
| 802 } | |
| 803 | |
| 804 | |
| 805 static void | |
| 806 ngx_mail_proxy_handler(ngx_event_t *ev) | |
| 807 { | |
| 808 char *action, *recv_action, *send_action; | |
| 809 size_t size; | |
| 810 ssize_t n; | |
| 811 ngx_buf_t *b; | |
| 812 ngx_uint_t do_write; | |
| 813 ngx_connection_t *c, *src, *dst; | |
| 814 ngx_mail_session_t *s; | |
| 815 ngx_mail_proxy_conf_t *pcf; | |
| 816 | |
| 817 c = ev->data; | |
| 818 s = c->data; | |
| 819 | |
| 820 if (ev->timedout) { | |
| 821 c->log->action = "proxying"; | |
| 822 | |
| 823 if (c == s->connection) { | |
| 824 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, | |
| 825 "client timed out"); | |
| 826 c->timedout = 1; | |
| 827 | |
| 828 } else { | |
| 829 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, | |
| 830 "upstream timed out"); | |
| 831 } | |
| 832 | |
| 833 ngx_mail_proxy_close_session(s); | |
| 834 return; | |
| 835 } | |
| 836 | |
| 837 if (c == s->connection) { | |
| 838 if (ev->write) { | |
| 839 recv_action = "proxying and reading from upstream"; | |
| 840 send_action = "proxying and sending to client"; | |
| 841 src = s->proxy->upstream.connection; | |
| 842 dst = c; | |
| 843 b = s->proxy->buffer; | |
| 844 | |
| 845 } else { | |
| 846 recv_action = "proxying and reading from client"; | |
| 847 send_action = "proxying and sending to upstream"; | |
| 848 src = c; | |
| 849 dst = s->proxy->upstream.connection; | |
| 850 b = s->buffer; | |
| 851 } | |
| 852 | |
| 853 } else { | |
| 854 if (ev->write) { | |
| 855 recv_action = "proxying and reading from client"; | |
| 856 send_action = "proxying and sending to upstream"; | |
| 857 src = s->connection; | |
| 858 dst = c; | |
| 859 b = s->buffer; | |
| 860 | |
| 861 } else { | |
| 862 recv_action = "proxying and reading from upstream"; | |
| 863 send_action = "proxying and sending to client"; | |
| 864 src = c; | |
| 865 dst = s->connection; | |
| 866 b = s->proxy->buffer; | |
| 867 } | |
| 868 } | |
| 869 | |
| 870 do_write = ev->write ? 1 : 0; | |
| 871 | |
| 872 ngx_log_debug3(NGX_LOG_DEBUG_MAIL, ev->log, 0, | |
| 873 "mail proxy handler: %d, #%d > #%d", | |
| 874 do_write, src->fd, dst->fd); | |
| 875 | |
| 876 for ( ;; ) { | |
| 877 | |
| 878 if (do_write) { | |
| 879 | |
| 880 size = b->last - b->pos; | |
| 881 | |
| 882 if (size && dst->write->ready) { | |
| 883 c->log->action = send_action; | |
| 884 | |
| 885 n = dst->send(dst, b->pos, size); | |
| 886 | |
| 887 if (n == NGX_ERROR) { | |
| 888 ngx_mail_proxy_close_session(s); | |
| 889 return; | |
| 890 } | |
| 891 | |
| 892 if (n > 0) { | |
| 893 b->pos += n; | |
| 894 | |
| 895 if (b->pos == b->last) { | |
| 896 b->pos = b->start; | |
| 897 b->last = b->start; | |
| 898 } | |
| 899 } | |
| 900 } | |
| 901 } | |
| 902 | |
| 903 size = b->end - b->last; | |
| 904 | |
| 905 if (size && src->read->ready) { | |
| 906 c->log->action = recv_action; | |
| 907 | |
| 908 n = src->recv(src, b->last, size); | |
| 909 | |
| 910 if (n == NGX_AGAIN || n == 0) { | |
| 911 break; | |
| 912 } | |
| 913 | |
| 914 if (n > 0) { | |
| 915 do_write = 1; | |
| 916 b->last += n; | |
| 917 | |
| 918 continue; | |
| 919 } | |
| 920 | |
| 921 if (n == NGX_ERROR) { | |
| 922 src->read->eof = 1; | |
| 923 } | |
| 924 } | |
| 925 | |
| 926 break; | |
| 927 } | |
| 928 | |
| 929 c->log->action = "proxying"; | |
| 930 | |
| 324 | 931 if ((s->connection->read->eof && s->buffer->pos == s->buffer->last) |
| 932 || (s->proxy->upstream.connection->read->eof | |
| 933 && s->proxy->buffer->pos == s->proxy->buffer->last) | |
| 934 || (s->connection->read->eof | |
| 935 && s->proxy->upstream.connection->read->eof)) | |
| 290 | 936 { |
| 937 action = c->log->action; | |
| 938 c->log->action = NULL; | |
| 939 ngx_log_error(NGX_LOG_INFO, c->log, 0, "proxied session done"); | |
| 940 c->log->action = action; | |
| 941 | |
| 942 ngx_mail_proxy_close_session(s); | |
| 943 return; | |
| 944 } | |
| 945 | |
| 946 if (ngx_handle_write_event(dst->write, 0) == NGX_ERROR) { | |
| 947 ngx_mail_proxy_close_session(s); | |
| 948 return; | |
| 949 } | |
| 950 | |
| 951 if (ngx_handle_read_event(dst->read, 0) == NGX_ERROR) { | |
| 952 ngx_mail_proxy_close_session(s); | |
| 953 return; | |
| 954 } | |
| 955 | |
| 956 if (ngx_handle_write_event(src->write, 0) == NGX_ERROR) { | |
| 957 ngx_mail_proxy_close_session(s); | |
| 958 return; | |
| 959 } | |
| 960 | |
| 961 if (ngx_handle_read_event(src->read, 0) == NGX_ERROR) { | |
| 962 ngx_mail_proxy_close_session(s); | |
| 963 return; | |
| 964 } | |
| 965 | |
| 966 if (c == s->connection) { | |
| 967 pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module); | |
| 968 ngx_add_timer(c->read, pcf->timeout); | |
| 969 } | |
| 970 } | |
| 971 | |
| 972 | |
| 973 static void | |
| 974 ngx_mail_proxy_upstream_error(ngx_mail_session_t *s) | |
| 975 { | |
| 976 if (s->proxy->upstream.connection) { | |
| 977 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0, | |
| 978 "close mail proxy connection: %d", | |
| 979 s->proxy->upstream.connection->fd); | |
| 980 | |
| 981 ngx_close_connection(s->proxy->upstream.connection); | |
| 982 } | |
| 983 | |
| 984 if (s->out.len == 0) { | |
| 985 ngx_mail_session_internal_server_error(s); | |
| 986 return; | |
| 987 } | |
| 988 | |
| 989 s->quit = 1; | |
| 990 ngx_mail_send(s->connection->write); | |
| 991 } | |
| 992 | |
| 993 | |
| 994 static void | |
| 995 ngx_mail_proxy_internal_server_error(ngx_mail_session_t *s) | |
| 996 { | |
| 997 if (s->proxy->upstream.connection) { | |
| 998 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0, | |
| 999 "close mail proxy connection: %d", | |
| 1000 s->proxy->upstream.connection->fd); | |
| 1001 | |
| 1002 ngx_close_connection(s->proxy->upstream.connection); | |
| 1003 } | |
| 1004 | |
| 1005 ngx_mail_session_internal_server_error(s); | |
| 1006 } | |
| 1007 | |
| 1008 | |
| 1009 static void | |
| 1010 ngx_mail_proxy_close_session(ngx_mail_session_t *s) | |
| 1011 { | |
| 1012 if (s->proxy->upstream.connection) { | |
| 1013 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0, | |
| 1014 "close mail proxy connection: %d", | |
| 1015 s->proxy->upstream.connection->fd); | |
| 1016 | |
| 1017 ngx_close_connection(s->proxy->upstream.connection); | |
| 1018 } | |
| 1019 | |
| 1020 ngx_mail_close_connection(s->connection); | |
| 1021 } | |
| 1022 | |
| 1023 | |
| 1024 static void * | |
| 1025 ngx_mail_proxy_create_conf(ngx_conf_t *cf) | |
| 1026 { | |
| 1027 ngx_mail_proxy_conf_t *pcf; | |
| 1028 | |
| 1029 pcf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_proxy_conf_t)); | |
| 1030 if (pcf == NULL) { | |
| 1031 return NGX_CONF_ERROR; | |
| 1032 } | |
| 1033 | |
| 1034 pcf->enable = NGX_CONF_UNSET; | |
| 1035 pcf->pass_error_message = NGX_CONF_UNSET; | |
| 1036 pcf->xclient = NGX_CONF_UNSET; | |
| 1037 pcf->buffer_size = NGX_CONF_UNSET_SIZE; | |
| 1038 pcf->timeout = NGX_CONF_UNSET_MSEC; | |
| 1039 | |
| 1040 return pcf; | |
| 1041 } | |
| 1042 | |
| 1043 | |
| 1044 static char * | |
| 1045 ngx_mail_proxy_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 1046 { | |
| 1047 ngx_mail_proxy_conf_t *prev = parent; | |
| 1048 ngx_mail_proxy_conf_t *conf = child; | |
| 1049 | |
| 1050 ngx_conf_merge_value(conf->enable, prev->enable, 0); | |
| 1051 ngx_conf_merge_value(conf->pass_error_message, prev->pass_error_message, 0); | |
| 1052 ngx_conf_merge_value(conf->xclient, prev->xclient, 1); | |
| 1053 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size, | |
| 1054 (size_t) ngx_pagesize); | |
| 1055 ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 24 * 60 * 60000); | |
| 1056 | |
| 1057 return NGX_CONF_OK; | |
| 1058 } |