1 /* $OpenBSD: smtpd.h,v 1.688 2024/09/03 12:07:40 gilles Exp $ */ 2 3 /* 4 * Copyright (c) 2008 Gilles Chehade <gilles@poolp.org> 5 * Copyright (c) 2008 Pierre-Yves Ritschard <pyr@openbsd.org> 6 * Copyright (c) 2012 Eric Faurot <eric@openbsd.org> 7 * 8 * Permission to use, copy, modify, and distribute this software for any 9 * purpose with or without fee is hereby granted, provided that the above 10 * copyright notice and this permission notice appear in all copies. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 */ 20 21 #ifndef nitems 22 #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0])) 23 #endif 24 25 #include <sys/queue.h> 26 #include <sys/tree.h> 27 #include <sys/socket.h> 28 #include <sys/time.h> 29 30 #include <event.h> 31 #include <imsg.h> 32 #include <limits.h> 33 #include <netdb.h> 34 #include <stdio.h> 35 36 #include "smtpd-defines.h" 37 #include "smtpd-api.h" 38 #include "ioev.h" 39 40 #define CHECK_IMSG_DATA_SIZE(imsg, expected_sz) do { \ 41 if ((imsg)->hdr.len - IMSG_HEADER_SIZE != (expected_sz)) \ 42 fatalx("smtpd: imsg %d: data size expected %zd got %zd",\ 43 (imsg)->hdr.type, \ 44 (expected_sz), (imsg)->hdr.len - IMSG_HEADER_SIZE); \ 45 } while (0) 46 47 #define CONF_FILE "/etc/mail/smtpd.conf" 48 #define MAILNAME_FILE "/etc/mail/mailname" 49 50 #define MAX_HOPS_COUNT 100 51 #define DEFAULT_MAX_BODY_SIZE (35*1024*1024) 52 53 #define EXPAND_BUFFER 1024 54 55 #define SMTPD_QUEUE_EXPIRY (4 * 24 * 60 * 60) 56 #define SMTPD_SOCKET "/var/run/smtpd.sock" 57 #define SMTPD_NAME "OpenSMTPD" 58 #define SMTPD_VERSION "7.6.0" 59 #define SMTPD_SESSION_TIMEOUT 300 60 #define SMTPD_BACKLOG 5 61 62 #define PATH_SMTPCTL "/usr/sbin/smtpctl" 63 64 #define PATH_OFFLINE "/offline" 65 #define PATH_PURGE "/purge" 66 #define PATH_TEMPORARY "/temporary" 67 68 #define PATH_LIBEXEC "/usr/local/libexec/smtpd" 69 70 71 /* 72 * RFC 5322 defines these characters as valid, some of them are 73 * potentially dangerous and need to be escaped. 74 */ 75 #define MAILADDR_ALLOWED "!#$%&'*/?^`{|}~+-=_" 76 #define MAILADDR_ESCAPE "!#$%&'*?`{|}~" 77 78 79 #define F_STARTTLS 0x01 80 #define F_SMTPS 0x02 81 #define F_SSL (F_STARTTLS | F_SMTPS) 82 #define F_AUTH 0x08 83 #define F_STARTTLS_REQUIRE 0x20 84 #define F_AUTH_REQUIRE 0x40 85 #define F_MASK_SOURCE 0x100 86 #define F_TLS_VERIFY 0x200 87 #define F_EXT_DSN 0x400 88 #define F_RECEIVEDAUTH 0x800 89 #define F_MASQUERADE 0x1000 90 #define F_FILTERED 0x2000 91 #define F_PROXY 0x4000 92 93 #define RELAY_TLS_OPPORTUNISTIC 0 94 #define RELAY_TLS_STARTTLS 1 95 #define RELAY_TLS_SMTPS 2 96 #define RELAY_TLS_NO 3 97 98 #define RELAY_AUTH 0x08 99 #define RELAY_LMTP 0x80 100 101 #define MTA_EXT_DSN 0x400 102 103 104 #define P_SENDMAIL 0 105 #define P_NEWALIASES 1 106 #define P_MAKEMAP 2 107 108 struct userinfo { 109 char username[SMTPD_VUSERNAME_SIZE]; 110 char directory[PATH_MAX]; 111 uid_t uid; 112 gid_t gid; 113 }; 114 115 struct netaddr { 116 struct sockaddr_storage ss; 117 int bits; 118 }; 119 120 struct relayhost { 121 uint16_t flags; 122 int tls; 123 char hostname[HOST_NAME_MAX+1]; 124 uint16_t port; 125 char authlabel[PATH_MAX]; 126 }; 127 128 struct credentials { 129 char username[LINE_MAX]; 130 char password[LINE_MAX]; 131 }; 132 133 struct destination { 134 char name[HOST_NAME_MAX+1]; 135 }; 136 137 struct source { 138 struct sockaddr_storage addr; 139 }; 140 141 struct addrname { 142 struct sockaddr_storage addr; 143 char name[HOST_NAME_MAX+1]; 144 }; 145 146 union lookup { 147 struct expand *expand; 148 struct credentials creds; 149 struct netaddr netaddr; 150 struct source source; 151 struct destination domain; 152 struct userinfo userinfo; 153 struct mailaddr mailaddr; 154 struct addrname addrname; 155 struct maddrmap *maddrmap; 156 char relayhost[LINE_MAX]; 157 }; 158 159 /* 160 * Bump IMSG_VERSION whenever a change is made to enum imsg_type. 161 * This will ensure that we can never use a wrong version of smtpctl with smtpd. 162 */ 163 #define IMSG_VERSION 16 164 165 enum imsg_type { 166 IMSG_NONE, 167 168 IMSG_CTL_OK, 169 IMSG_CTL_FAIL, 170 171 IMSG_CTL_GET_DIGEST, 172 IMSG_CTL_GET_STATS, 173 IMSG_CTL_LIST_MESSAGES, 174 IMSG_CTL_LIST_ENVELOPES, 175 IMSG_CTL_MTA_SHOW_HOSTS, 176 IMSG_CTL_MTA_SHOW_RELAYS, 177 IMSG_CTL_MTA_SHOW_ROUTES, 178 IMSG_CTL_MTA_SHOW_HOSTSTATS, 179 IMSG_CTL_MTA_BLOCK, 180 IMSG_CTL_MTA_UNBLOCK, 181 IMSG_CTL_MTA_SHOW_BLOCK, 182 IMSG_CTL_PAUSE_EVP, 183 IMSG_CTL_PAUSE_MDA, 184 IMSG_CTL_PAUSE_MTA, 185 IMSG_CTL_PAUSE_SMTP, 186 IMSG_CTL_PROFILE, 187 IMSG_CTL_PROFILE_DISABLE, 188 IMSG_CTL_PROFILE_ENABLE, 189 IMSG_CTL_RESUME_EVP, 190 IMSG_CTL_RESUME_MDA, 191 IMSG_CTL_RESUME_MTA, 192 IMSG_CTL_RESUME_SMTP, 193 IMSG_CTL_RESUME_ROUTE, 194 IMSG_CTL_REMOVE, 195 IMSG_CTL_SCHEDULE, 196 IMSG_CTL_SHOW_STATUS, 197 IMSG_CTL_TRACE_DISABLE, 198 IMSG_CTL_TRACE_ENABLE, 199 IMSG_CTL_UPDATE_TABLE, 200 IMSG_CTL_VERBOSE, 201 IMSG_CTL_DISCOVER_EVPID, 202 IMSG_CTL_DISCOVER_MSGID, 203 204 IMSG_CTL_SMTP_SESSION, 205 206 IMSG_GETADDRINFO, 207 IMSG_GETADDRINFO_END, 208 IMSG_GETNAMEINFO, 209 IMSG_RES_QUERY, 210 211 IMSG_SETUP_KEY, 212 IMSG_SETUP_PEER, 213 IMSG_SETUP_DONE, 214 215 IMSG_CONF_START, 216 IMSG_CONF_END, 217 218 IMSG_STAT_INCREMENT, 219 IMSG_STAT_DECREMENT, 220 IMSG_STAT_SET, 221 222 IMSG_LKA_AUTHENTICATE, 223 IMSG_LKA_OPEN_FORWARD, 224 IMSG_LKA_ENVELOPE_SUBMIT, 225 IMSG_LKA_ENVELOPE_COMMIT, 226 227 IMSG_QUEUE_DELIVER, 228 IMSG_QUEUE_DELIVERY_OK, 229 IMSG_QUEUE_DELIVERY_TEMPFAIL, 230 IMSG_QUEUE_DELIVERY_PERMFAIL, 231 IMSG_QUEUE_DELIVERY_LOOP, 232 IMSG_QUEUE_DISCOVER_EVPID, 233 IMSG_QUEUE_DISCOVER_MSGID, 234 IMSG_QUEUE_ENVELOPE_ACK, 235 IMSG_QUEUE_ENVELOPE_COMMIT, 236 IMSG_QUEUE_ENVELOPE_REMOVE, 237 IMSG_QUEUE_ENVELOPE_SCHEDULE, 238 IMSG_QUEUE_ENVELOPE_SUBMIT, 239 IMSG_QUEUE_HOLDQ_HOLD, 240 IMSG_QUEUE_HOLDQ_RELEASE, 241 IMSG_QUEUE_MESSAGE_COMMIT, 242 IMSG_QUEUE_MESSAGE_ROLLBACK, 243 IMSG_QUEUE_SMTP_SESSION, 244 IMSG_QUEUE_TRANSFER, 245 246 IMSG_MDA_DELIVERY_OK, 247 IMSG_MDA_DELIVERY_TEMPFAIL, 248 IMSG_MDA_DELIVERY_PERMFAIL, 249 IMSG_MDA_DELIVERY_LOOP, 250 IMSG_MDA_DELIVERY_HOLD, 251 IMSG_MDA_DONE, 252 IMSG_MDA_FORK, 253 IMSG_MDA_HOLDQ_RELEASE, 254 IMSG_MDA_LOOKUP_USERINFO, 255 IMSG_MDA_KILL, 256 IMSG_MDA_OPEN_MESSAGE, 257 258 IMSG_MTA_DELIVERY_OK, 259 IMSG_MTA_DELIVERY_TEMPFAIL, 260 IMSG_MTA_DELIVERY_PERMFAIL, 261 IMSG_MTA_DELIVERY_LOOP, 262 IMSG_MTA_DELIVERY_HOLD, 263 IMSG_MTA_DNS_HOST, 264 IMSG_MTA_DNS_HOST_END, 265 IMSG_MTA_DNS_MX, 266 IMSG_MTA_DNS_MX_PREFERENCE, 267 IMSG_MTA_HOLDQ_RELEASE, 268 IMSG_MTA_LOOKUP_CREDENTIALS, 269 IMSG_MTA_LOOKUP_SOURCE, 270 IMSG_MTA_LOOKUP_HELO, 271 IMSG_MTA_LOOKUP_SMARTHOST, 272 IMSG_MTA_OPEN_MESSAGE, 273 IMSG_MTA_SCHEDULE, 274 275 IMSG_SCHED_ENVELOPE_BOUNCE, 276 IMSG_SCHED_ENVELOPE_DELIVER, 277 IMSG_SCHED_ENVELOPE_EXPIRE, 278 IMSG_SCHED_ENVELOPE_INJECT, 279 IMSG_SCHED_ENVELOPE_REMOVE, 280 IMSG_SCHED_ENVELOPE_TRANSFER, 281 282 IMSG_SMTP_AUTHENTICATE, 283 IMSG_SMTP_MESSAGE_COMMIT, 284 IMSG_SMTP_MESSAGE_CREATE, 285 IMSG_SMTP_MESSAGE_ROLLBACK, 286 IMSG_SMTP_MESSAGE_OPEN, 287 IMSG_SMTP_CHECK_SENDER, 288 IMSG_SMTP_EXPAND_RCPT, 289 IMSG_SMTP_LOOKUP_HELO, 290 291 IMSG_SMTP_REQ_CONNECT, 292 IMSG_SMTP_REQ_HELO, 293 IMSG_SMTP_REQ_MAIL, 294 IMSG_SMTP_REQ_RCPT, 295 IMSG_SMTP_REQ_DATA, 296 IMSG_SMTP_REQ_EOM, 297 IMSG_SMTP_EVENT_RSET, 298 IMSG_SMTP_EVENT_COMMIT, 299 IMSG_SMTP_EVENT_ROLLBACK, 300 IMSG_SMTP_EVENT_DISCONNECT, 301 302 IMSG_LKA_PROCESSOR_FORK, 303 IMSG_LKA_PROCESSOR_ERRFD, 304 305 IMSG_REPORT_SMTP_LINK_CONNECT, 306 IMSG_REPORT_SMTP_LINK_DISCONNECT, 307 IMSG_REPORT_SMTP_LINK_GREETING, 308 IMSG_REPORT_SMTP_LINK_IDENTIFY, 309 IMSG_REPORT_SMTP_LINK_TLS, 310 IMSG_REPORT_SMTP_LINK_AUTH, 311 IMSG_REPORT_SMTP_TX_RESET, 312 IMSG_REPORT_SMTP_TX_BEGIN, 313 IMSG_REPORT_SMTP_TX_MAIL, 314 IMSG_REPORT_SMTP_TX_RCPT, 315 IMSG_REPORT_SMTP_TX_ENVELOPE, 316 IMSG_REPORT_SMTP_TX_DATA, 317 IMSG_REPORT_SMTP_TX_COMMIT, 318 IMSG_REPORT_SMTP_TX_ROLLBACK, 319 IMSG_REPORT_SMTP_PROTOCOL_CLIENT, 320 IMSG_REPORT_SMTP_PROTOCOL_SERVER, 321 IMSG_REPORT_SMTP_FILTER_RESPONSE, 322 IMSG_REPORT_SMTP_TIMEOUT, 323 324 IMSG_FILTER_SMTP_BEGIN, 325 IMSG_FILTER_SMTP_END, 326 IMSG_FILTER_SMTP_PROTOCOL, 327 IMSG_FILTER_SMTP_DATA_BEGIN, 328 IMSG_FILTER_SMTP_DATA_END, 329 330 IMSG_CA_RSA_PRIVENC, 331 IMSG_CA_RSA_PRIVDEC, 332 IMSG_CA_ECDSA_SIGN, 333 }; 334 335 enum smtp_proc_type { 336 PROC_PARENT = 0, 337 PROC_LKA, 338 PROC_QUEUE, 339 PROC_CONTROL, 340 PROC_SCHEDULER, 341 PROC_DISPATCHER, 342 PROC_CA, 343 PROC_PROCESSOR, 344 PROC_CLIENT, 345 }; 346 347 enum table_type { 348 T_NONE = 0, 349 T_DYNAMIC = 0x01, /* table with external source */ 350 T_LIST = 0x02, /* table holding a list */ 351 T_HASH = 0x04, /* table holding a hash table */ 352 }; 353 354 struct table { 355 char t_name[LINE_MAX]; 356 enum table_type t_type; 357 char t_config[PATH_MAX]; 358 359 unsigned int t_services; 360 void *t_handle; 361 struct table_backend *t_backend; 362 }; 363 364 struct table_backend { 365 const char *name; 366 const unsigned int services; 367 int (*config)(struct table *); 368 int (*add)(struct table *, const char *, const char *); 369 void (*dump)(struct table *); 370 int (*open)(struct table *); 371 int (*update)(struct table *); 372 void (*close)(struct table *); 373 int (*lookup)(struct table *, enum table_service, const char *, char **); 374 int (*fetch)(struct table *, enum table_service, char **); 375 }; 376 377 378 enum bounce_type { 379 B_FAILED, 380 B_DELAYED, 381 B_DELIVERED 382 }; 383 384 enum dsn_ret { 385 DSN_RETFULL = 1, 386 DSN_RETHDRS 387 }; 388 389 struct delivery_bounce { 390 enum bounce_type type; 391 time_t delay; 392 time_t ttl; 393 enum dsn_ret dsn_ret; 394 int mta_without_dsn; 395 }; 396 397 enum expand_type { 398 EXPAND_INVALID, 399 EXPAND_USERNAME, 400 EXPAND_FILENAME, 401 EXPAND_FILTER, 402 EXPAND_INCLUDE, 403 EXPAND_ADDRESS, 404 EXPAND_ERROR, 405 }; 406 407 enum filter_phase { 408 FILTER_CONNECT, 409 FILTER_HELO, 410 FILTER_EHLO, 411 FILTER_STARTTLS, 412 FILTER_AUTH, 413 FILTER_MAIL_FROM, 414 FILTER_RCPT_TO, 415 FILTER_DATA, 416 FILTER_DATA_LINE, 417 FILTER_RSET, 418 FILTER_QUIT, 419 FILTER_NOOP, 420 FILTER_HELP, 421 FILTER_WIZ, 422 FILTER_COMMIT, 423 FILTER_PHASES_COUNT /* must be last */ 424 }; 425 426 struct expandnode { 427 RB_ENTRY(expandnode) entry; 428 TAILQ_ENTRY(expandnode) tq_entry; 429 enum expand_type type; 430 int sameuser; 431 int realuser; 432 uid_t realuser_uid; 433 int forwarded; 434 struct rule *rule; 435 struct expandnode *parent; 436 unsigned int depth; 437 union { 438 /* 439 * user field handles both expansion user and system user 440 * so we MUST make it large enough to fit a mailaddr user 441 */ 442 char user[SMTPD_MAXLOCALPARTSIZE]; 443 char buffer[EXPAND_BUFFER]; 444 struct mailaddr mailaddr; 445 } u; 446 char subaddress[SMTPD_SUBADDRESS_SIZE]; 447 }; 448 449 struct expand { 450 RB_HEAD(expandtree, expandnode) tree; 451 TAILQ_HEAD(xnodes, expandnode) *queue; 452 size_t nb_nodes; 453 struct rule *rule; 454 struct expandnode *parent; 455 }; 456 457 struct maddrnode { 458 TAILQ_ENTRY(maddrnode) entries; 459 struct mailaddr mailaddr; 460 }; 461 462 struct maddrmap { 463 TAILQ_HEAD(xmaddr, maddrnode) queue; 464 }; 465 466 #define DSN_SUCCESS 0x01 467 #define DSN_FAILURE 0x02 468 #define DSN_DELAY 0x04 469 #define DSN_NEVER 0x08 470 471 #define DSN_ENVID_LEN 100 472 #define DSN_ORCPT_LEN 500 473 474 #define SMTPD_ENVELOPE_VERSION 3 475 struct envelope { 476 TAILQ_ENTRY(envelope) entry; 477 478 char dispatcher[HOST_NAME_MAX+1]; 479 480 char tag[SMTPD_TAG_SIZE]; 481 482 uint32_t version; 483 uint64_t id; 484 enum envelope_flags flags; 485 486 char smtpname[HOST_NAME_MAX+1]; 487 char helo[HOST_NAME_MAX+1]; 488 char hostname[HOST_NAME_MAX+1]; 489 char username[SMTPD_MAXMAILADDRSIZE]; 490 char errorline[LINE_MAX]; 491 struct sockaddr_storage ss; 492 493 struct mailaddr sender; 494 struct mailaddr rcpt; 495 struct mailaddr dest; 496 497 char mda_user[SMTPD_VUSERNAME_SIZE]; 498 char mda_subaddress[SMTPD_SUBADDRESS_SIZE]; 499 char mda_exec[LINE_MAX]; 500 501 enum delivery_type type; 502 union { 503 struct delivery_bounce bounce; 504 } agent; 505 506 uint16_t retry; 507 time_t creation; 508 time_t ttl; 509 time_t lasttry; 510 time_t nexttry; 511 time_t lastbounce; 512 513 char dsn_orcpt[DSN_ORCPT_LEN+1]; 514 char dsn_envid[DSN_ENVID_LEN+1]; 515 uint8_t dsn_notify; 516 enum dsn_ret dsn_ret; 517 518 uint8_t esc_class; 519 uint8_t esc_code; 520 }; 521 522 struct listener { 523 uint16_t flags; 524 int fd; 525 struct sockaddr_storage ss; 526 in_port_t port; 527 struct timeval timeout; 528 struct event ev; 529 char filter_name[PATH_MAX]; 530 char pki_name[PATH_MAX]; 531 char ca_name[PATH_MAX]; 532 char tag[SMTPD_TAG_SIZE]; 533 char authtable[LINE_MAX]; 534 char hostname[HOST_NAME_MAX+1]; 535 char hostnametable[PATH_MAX]; 536 char sendertable[PATH_MAX]; 537 538 TAILQ_ENTRY(listener) entry; 539 540 int local; /* there must be a better way */ 541 542 char *tls_protocols; 543 char *tls_ciphers; 544 struct tls *tls; 545 struct pki **pki; 546 int pkicount; 547 }; 548 549 struct smtpd { 550 char sc_conffile[PATH_MAX]; 551 size_t sc_maxsize; 552 553 #define SMTPD_OPT_VERBOSE 0x00000001 554 #define SMTPD_OPT_NOACTION 0x00000002 555 uint32_t sc_opts; 556 557 #define SMTPD_EXITING 0x00000001 /* unused */ 558 #define SMTPD_MDA_PAUSED 0x00000002 559 #define SMTPD_MTA_PAUSED 0x00000004 560 #define SMTPD_SMTP_PAUSED 0x00000008 561 #define SMTPD_MDA_BUSY 0x00000010 562 #define SMTPD_MTA_BUSY 0x00000020 563 #define SMTPD_BOUNCE_BUSY 0x00000040 564 #define SMTPD_SMTP_DISABLED 0x00000080 565 uint32_t sc_flags; 566 567 #define QUEUE_COMPRESSION 0x00000001 568 #define QUEUE_ENCRYPTION 0x00000002 569 #define QUEUE_EVPCACHE 0x00000004 570 uint32_t sc_queue_flags; 571 char *sc_queue_key; 572 size_t sc_queue_evpcache_size; 573 574 size_t sc_session_max_rcpt; 575 size_t sc_session_max_mails; 576 577 struct dict *sc_mda_wrappers; 578 size_t sc_mda_max_session; 579 size_t sc_mda_max_user_session; 580 size_t sc_mda_task_hiwat; 581 size_t sc_mda_task_lowat; 582 size_t sc_mda_task_release; 583 584 size_t sc_mta_max_deferred; 585 586 size_t sc_scheduler_max_inflight; 587 size_t sc_scheduler_max_evp_batch_size; 588 size_t sc_scheduler_max_msg_batch_size; 589 size_t sc_scheduler_max_schedule; 590 591 struct dict *sc_filter_processes_dict; 592 593 int sc_ttl; 594 #define MAX_BOUNCE_WARN 4 595 time_t sc_bounce_warn[MAX_BOUNCE_WARN]; 596 char sc_hostname[HOST_NAME_MAX+1]; 597 struct stat_backend *sc_stat; 598 struct compress_backend *sc_comp; 599 600 time_t sc_uptime; 601 602 /* This is a listener for a local socket used by smtp_enqueue(). */ 603 struct listener *sc_sock_listener; 604 605 TAILQ_HEAD(listenerlist, listener) *sc_listeners; 606 607 TAILQ_HEAD(rulelist, rule) *sc_rules; 608 609 610 struct dict *sc_filters_dict; 611 struct dict *sc_dispatchers; 612 struct dispatcher *sc_dispatcher_bounce; 613 614 struct dict *sc_ca_dict; 615 struct dict *sc_pki_dict; 616 struct dict *sc_ssl_dict; 617 618 struct dict *sc_tables_dict; /* keyed lookup */ 619 620 struct dict *sc_limits_dict; 621 622 char *sc_tls_ciphers; 623 624 char *sc_subaddressing_delim; 625 626 char *sc_srs_key; 627 char *sc_srs_key_backup; 628 int sc_srs_ttl; 629 630 char *sc_admd; 631 }; 632 633 #define TRACE_DEBUG 0x0001 634 #define TRACE_IMSG 0x0002 635 #define TRACE_IO 0x0004 636 #define TRACE_SMTP 0x0008 637 #define TRACE_FILTERS 0x0010 638 #define TRACE_MTA 0x0020 639 #define TRACE_BOUNCE 0x0040 640 #define TRACE_SCHEDULER 0x0080 641 #define TRACE_LOOKUP 0x0100 642 #define TRACE_STAT 0x0200 643 #define TRACE_RULES 0x0400 644 #define TRACE_MPROC 0x0800 645 #define TRACE_EXPAND 0x1000 646 #define TRACE_TABLES 0x2000 647 #define TRACE_QUEUE 0x4000 648 649 #define PROFILE_TOSTAT 0x0001 650 #define PROFILE_IMSG 0x0002 651 #define PROFILE_QUEUE 0x0004 652 653 struct forward_req { 654 uint64_t id; 655 uint8_t status; 656 657 char user[SMTPD_VUSERNAME_SIZE]; 658 uid_t uid; 659 gid_t gid; 660 char directory[PATH_MAX]; 661 }; 662 663 struct deliver { 664 char dispatcher[EXPAND_BUFFER]; 665 666 struct mailaddr sender; 667 struct mailaddr rcpt; 668 struct mailaddr dest; 669 670 char mda_subaddress[SMTPD_SUBADDRESS_SIZE]; 671 char mda_exec[LINE_MAX]; 672 673 struct userinfo userinfo; 674 }; 675 676 struct mta_host { 677 SPLAY_ENTRY(mta_host) entry; 678 struct sockaddr *sa; 679 char *ptrname; 680 int refcount; 681 size_t nconn; 682 time_t lastconn; 683 time_t lastptrquery; 684 685 #define HOST_IGNORE 0x01 686 int flags; 687 }; 688 689 struct mta_mx { 690 TAILQ_ENTRY(mta_mx) entry; 691 struct mta_host *host; 692 char *mxname; 693 int preference; 694 }; 695 696 struct mta_domain { 697 SPLAY_ENTRY(mta_domain) entry; 698 char *name; 699 int as_host; 700 TAILQ_HEAD(, mta_mx) mxs; 701 int mxstatus; 702 int refcount; 703 size_t nconn; 704 time_t lastconn; 705 time_t lastmxquery; 706 }; 707 708 struct mta_source { 709 SPLAY_ENTRY(mta_source) entry; 710 struct sockaddr *sa; 711 int refcount; 712 size_t nconn; 713 time_t lastconn; 714 }; 715 716 struct mta_connector { 717 struct mta_source *source; 718 struct mta_relay *relay; 719 720 #define CONNECTOR_ERROR_FAMILY 0x0001 721 #define CONNECTOR_ERROR_SOURCE 0x0002 722 #define CONNECTOR_ERROR_MX 0x0004 723 #define CONNECTOR_ERROR_ROUTE_NET 0x0008 724 #define CONNECTOR_ERROR_ROUTE_SMTP 0x0010 725 #define CONNECTOR_ERROR_ROUTE 0x0018 726 #define CONNECTOR_ERROR_BLOCKED 0x0020 727 #define CONNECTOR_ERROR 0x00ff 728 729 #define CONNECTOR_LIMIT_HOST 0x0100 730 #define CONNECTOR_LIMIT_ROUTE 0x0200 731 #define CONNECTOR_LIMIT_SOURCE 0x0400 732 #define CONNECTOR_LIMIT_RELAY 0x0800 733 #define CONNECTOR_LIMIT_CONN 0x1000 734 #define CONNECTOR_LIMIT_DOMAIN 0x2000 735 #define CONNECTOR_LIMIT 0xff00 736 737 #define CONNECTOR_NEW 0x10000 738 #define CONNECTOR_WAIT 0x20000 739 int flags; 740 741 int refcount; 742 size_t nconn; 743 time_t lastconn; 744 }; 745 746 struct mta_route { 747 SPLAY_ENTRY(mta_route) entry; 748 uint64_t id; 749 struct mta_source *src; 750 struct mta_host *dst; 751 #define ROUTE_NEW 0x01 752 #define ROUTE_RUNQ 0x02 753 #define ROUTE_KEEPALIVE 0x04 754 #define ROUTE_DISABLED 0xf0 755 #define ROUTE_DISABLED_NET 0x10 756 #define ROUTE_DISABLED_SMTP 0x20 757 int flags; 758 int nerror; 759 int penalty; 760 int refcount; 761 size_t nconn; 762 time_t lastconn; 763 time_t lastdisc; 764 time_t lastpenalty; 765 }; 766 767 struct mta_limits { 768 size_t maxconn_per_host; 769 size_t maxconn_per_route; 770 size_t maxconn_per_source; 771 size_t maxconn_per_connector; 772 size_t maxconn_per_relay; 773 size_t maxconn_per_domain; 774 775 time_t conndelay_host; 776 time_t conndelay_route; 777 time_t conndelay_source; 778 time_t conndelay_connector; 779 time_t conndelay_relay; 780 time_t conndelay_domain; 781 782 time_t discdelay_route; 783 784 size_t max_mail_per_session; 785 time_t sessdelay_transaction; 786 time_t sessdelay_keepalive; 787 788 size_t max_failures_per_session; 789 790 int family; 791 792 int task_hiwat; 793 int task_lowat; 794 int task_release; 795 }; 796 797 struct mta_relay { 798 SPLAY_ENTRY(mta_relay) entry; 799 uint64_t id; 800 801 struct dispatcher *dispatcher; 802 struct mta_domain *domain; 803 struct mta_limits *limits; 804 int tls; 805 int flags; 806 char *backupname; 807 int backuppref; 808 char *sourcetable; 809 uint16_t port; 810 char *pki_name; 811 char *ca_name; 812 char *authtable; 813 char *authlabel; 814 char *helotable; 815 char *heloname; 816 char *secret; 817 int srs; 818 819 int state; 820 size_t ntask; 821 TAILQ_HEAD(, mta_task) tasks; 822 823 struct tree connectors; 824 size_t sourceloop; 825 time_t lastsource; 826 time_t nextsource; 827 828 int fail; 829 char *failstr; 830 831 #define RELAY_WAIT_MX 0x01 832 #define RELAY_WAIT_PREFERENCE 0x02 833 #define RELAY_WAIT_SECRET 0x04 834 #define RELAY_WAIT_LIMITS 0x08 835 #define RELAY_WAIT_SOURCE 0x10 836 #define RELAY_WAIT_CONNECTOR 0x20 837 #define RELAY_WAIT_SMARTHOST 0x40 838 #define RELAY_WAITMASK 0x7f 839 int status; 840 841 int refcount; 842 size_t nconn; 843 size_t nconn_ready; 844 time_t lastconn; 845 }; 846 847 struct mta_envelope { 848 TAILQ_ENTRY(mta_envelope) entry; 849 uint64_t id; 850 uint64_t session; 851 time_t creation; 852 char *smtpname; 853 char *dest; 854 char *rcpt; 855 struct mta_task *task; 856 int delivery; 857 858 int ext; 859 char *dsn_orcpt; 860 char dsn_envid[DSN_ENVID_LEN+1]; 861 uint8_t dsn_notify; 862 enum dsn_ret dsn_ret; 863 864 char status[LINE_MAX]; 865 }; 866 867 struct mta_task { 868 TAILQ_ENTRY(mta_task) entry; 869 struct mta_relay *relay; 870 uint32_t msgid; 871 TAILQ_HEAD(, mta_envelope) envelopes; 872 char *sender; 873 }; 874 875 struct passwd; 876 877 struct queue_backend { 878 int (*init)(struct passwd *, int, const char *); 879 }; 880 881 struct compress_backend { 882 size_t (*compress_chunk)(void *, size_t, void *, size_t); 883 size_t (*uncompress_chunk)(void *, size_t, void *, size_t); 884 int (*compress_file)(FILE *, FILE *); 885 int (*uncompress_file)(FILE *, FILE *); 886 }; 887 888 /* auth structures */ 889 enum auth_type { 890 AUTH_BSD, 891 AUTH_PWD, 892 }; 893 894 struct auth_backend { 895 int (*authenticate)(char *, char *); 896 }; 897 898 struct scheduler_backend { 899 int (*init)(const char *); 900 901 int (*insert)(struct scheduler_info *); 902 size_t (*commit)(uint32_t); 903 size_t (*rollback)(uint32_t); 904 905 int (*update)(struct scheduler_info *); 906 int (*delete)(uint64_t); 907 int (*hold)(uint64_t, uint64_t); 908 int (*release)(int, uint64_t, int); 909 910 int (*batch)(int, int*, size_t*, uint64_t*, int*); 911 912 size_t (*messages)(uint32_t, uint32_t *, size_t); 913 size_t (*envelopes)(uint64_t, struct evpstate *, size_t); 914 int (*schedule)(uint64_t); 915 int (*remove)(uint64_t); 916 int (*suspend)(uint64_t); 917 int (*resume)(uint64_t); 918 int (*query)(uint64_t); 919 }; 920 921 enum stat_type { 922 STAT_COUNTER, 923 STAT_TIMESTAMP, 924 STAT_TIMEVAL, 925 STAT_TIMESPEC, 926 }; 927 928 struct stat_value { 929 enum stat_type type; 930 union stat_v { 931 size_t counter; 932 time_t timestamp; 933 struct timeval tv; 934 struct timespec ts; 935 } u; 936 }; 937 938 #define STAT_KEY_SIZE 1024 939 struct stat_kv { 940 void *iter; 941 char key[STAT_KEY_SIZE]; 942 struct stat_value val; 943 }; 944 945 struct stat_backend { 946 void (*init)(void); 947 void (*close)(void); 948 void (*increment)(const char *, size_t); 949 void (*decrement)(const char *, size_t); 950 void (*set)(const char *, const struct stat_value *); 951 int (*iter)(void **, char **, struct stat_value *); 952 }; 953 954 struct stat_digest { 955 time_t startup; 956 time_t timestamp; 957 958 size_t clt_connect; 959 size_t clt_disconnect; 960 961 size_t evp_enqueued; 962 size_t evp_dequeued; 963 964 size_t evp_expired; 965 size_t evp_removed; 966 size_t evp_bounce; 967 968 size_t dlv_ok; 969 size_t dlv_permfail; 970 size_t dlv_tempfail; 971 size_t dlv_loop; 972 }; 973 974 975 struct mproc { 976 pid_t pid; 977 char *name; 978 int proc; 979 void (*handler)(struct mproc *, struct imsg *); 980 struct imsgbuf imsgbuf; 981 982 char *m_buf; 983 size_t m_alloc; 984 size_t m_pos; 985 uint32_t m_type; 986 uint32_t m_peerid; 987 pid_t m_pid; 988 int m_fd; 989 990 int enable; 991 short events; 992 struct event ev; 993 void *data; 994 }; 995 996 struct msg { 997 const uint8_t *pos; 998 const uint8_t *end; 999 }; 1000 1001 extern enum smtp_proc_type smtpd_process; 1002 1003 extern int tracing; 1004 extern int foreground_log; 1005 extern int profiling; 1006 1007 extern struct mproc *p_control; 1008 extern struct mproc *p_parent; 1009 extern struct mproc *p_lka; 1010 extern struct mproc *p_queue; 1011 extern struct mproc *p_scheduler; 1012 extern struct mproc *p_dispatcher; 1013 extern struct mproc *p_ca; 1014 1015 extern struct smtpd *env; 1016 extern void (*imsg_callback)(struct mproc *, struct imsg *); 1017 1018 /* inter-process structures */ 1019 1020 struct bounce_req_msg { 1021 uint64_t evpid; 1022 time_t timestamp; 1023 struct delivery_bounce bounce; 1024 }; 1025 1026 enum dns_error { 1027 DNS_OK = 0, 1028 DNS_RETRY, 1029 DNS_EINVAL, 1030 DNS_ENONAME, 1031 DNS_ENOTFOUND, 1032 /* RFC 7505 */ 1033 DNS_NULLMX, 1034 }; 1035 1036 enum lka_resp_status { 1037 LKA_OK, 1038 LKA_TEMPFAIL, 1039 LKA_PERMFAIL 1040 }; 1041 1042 enum filter_type { 1043 FILTER_TYPE_BUILTIN, 1044 FILTER_TYPE_PROC, 1045 FILTER_TYPE_CHAIN, 1046 }; 1047 1048 enum filter_subsystem { 1049 FILTER_SUBSYSTEM_SMTP_IN = 1<<0, 1050 FILTER_SUBSYSTEM_SMTP_OUT = 1<<1, 1051 }; 1052 1053 struct filter_proc { 1054 const char *command; 1055 const char *user; 1056 const char *group; 1057 const char *chroot; 1058 int errfd; 1059 enum filter_subsystem filter_subsystem; 1060 }; 1061 1062 struct filter_config { 1063 char *name; 1064 enum filter_subsystem filter_subsystem; 1065 enum filter_type filter_type; 1066 enum filter_phase phase; 1067 char *reject; 1068 char *disconnect; 1069 char *rewrite; 1070 char *report; 1071 uint8_t junk; 1072 uint8_t bypass; 1073 char *proc; 1074 1075 const char **chain; 1076 size_t chain_size; 1077 struct dict chain_procs; 1078 1079 int8_t not_fcrdns; 1080 int8_t fcrdns; 1081 1082 int8_t not_rdns; 1083 int8_t rdns; 1084 1085 int8_t not_rdns_table; 1086 struct table *rdns_table; 1087 1088 int8_t not_rdns_regex; 1089 struct table *rdns_regex; 1090 1091 int8_t not_src_table; 1092 struct table *src_table; 1093 1094 int8_t not_src_regex; 1095 struct table *src_regex; 1096 1097 int8_t not_helo_table; 1098 struct table *helo_table; 1099 1100 int8_t not_helo_regex; 1101 struct table *helo_regex; 1102 1103 int8_t not_auth; 1104 int8_t auth; 1105 1106 int8_t not_auth_table; 1107 struct table *auth_table; 1108 1109 int8_t not_auth_regex; 1110 struct table *auth_regex; 1111 1112 int8_t not_mail_from_table; 1113 struct table *mail_from_table; 1114 1115 int8_t not_mail_from_regex; 1116 struct table *mail_from_regex; 1117 1118 int8_t not_rcpt_to_table; 1119 struct table *rcpt_to_table; 1120 1121 int8_t not_rcpt_to_regex; 1122 struct table *rcpt_to_regex; 1123 1124 }; 1125 1126 enum filter_status { 1127 FILTER_PROCEED, 1128 FILTER_REPORT, 1129 FILTER_REWRITE, 1130 FILTER_REJECT, 1131 FILTER_DISCONNECT, 1132 FILTER_JUNK, 1133 }; 1134 1135 enum ca_resp_status { 1136 CA_OK, 1137 CA_FAIL 1138 }; 1139 1140 enum mda_resp_status { 1141 MDA_OK, 1142 MDA_TEMPFAIL, 1143 MDA_PERMFAIL 1144 }; 1145 1146 struct msg_walkinfo { 1147 struct event ev; 1148 uint32_t msgid; 1149 uint32_t peerid; 1150 size_t n_evp; 1151 void *data; 1152 int done; 1153 }; 1154 1155 1156 enum dispatcher_type { 1157 DISPATCHER_LOCAL, 1158 DISPATCHER_REMOTE, 1159 DISPATCHER_BOUNCE, 1160 }; 1161 1162 struct dispatcher_local { 1163 uint8_t is_mbox; /* only for MBOX */ 1164 1165 uint8_t expand_only; 1166 uint8_t forward_only; 1167 1168 char *mda_wrapper; 1169 char *command; 1170 1171 char *table_alias; 1172 char *table_virtual; 1173 char *table_userbase; 1174 1175 char *user; 1176 }; 1177 1178 struct dispatcher_remote { 1179 char *helo; 1180 char *helo_source; 1181 1182 char *source; 1183 1184 struct tls_config *tls_config; 1185 char *ca; 1186 char *pki; 1187 1188 char *mail_from; 1189 1190 char *smarthost; 1191 int smarthost_domain; 1192 1193 char *auth; 1194 int tls_required; 1195 int tls_verify; 1196 char *tls_protocols; 1197 char *tls_ciphers; 1198 1199 int backup; 1200 char *backupmx; 1201 1202 char *filtername; 1203 1204 int srs; 1205 }; 1206 1207 struct dispatcher_bounce { 1208 }; 1209 1210 struct dispatcher { 1211 enum dispatcher_type type; 1212 union dispatcher_agent { 1213 struct dispatcher_local local; 1214 struct dispatcher_remote remote; 1215 struct dispatcher_bounce bounce; 1216 } u; 1217 1218 time_t ttl; 1219 }; 1220 1221 struct rule { 1222 TAILQ_ENTRY(rule) r_entry; 1223 1224 uint8_t reject; 1225 1226 int8_t flag_tag; 1227 int8_t flag_from; 1228 int8_t flag_for; 1229 int8_t flag_from_rdns; 1230 int8_t flag_from_socket; 1231 1232 int8_t flag_tag_regex; 1233 int8_t flag_from_regex; 1234 int8_t flag_for_regex; 1235 1236 int8_t flag_smtp_helo; 1237 int8_t flag_smtp_starttls; 1238 int8_t flag_smtp_auth; 1239 int8_t flag_smtp_mail_from; 1240 int8_t flag_smtp_rcpt_to; 1241 1242 int8_t flag_smtp_helo_regex; 1243 int8_t flag_smtp_starttls_regex; 1244 int8_t flag_smtp_auth_regex; 1245 int8_t flag_smtp_mail_from_regex; 1246 int8_t flag_smtp_rcpt_to_regex; 1247 1248 1249 char *table_tag; 1250 char *table_from; 1251 char *table_for; 1252 1253 char *table_smtp_helo; 1254 char *table_smtp_auth; 1255 char *table_smtp_mail_from; 1256 char *table_smtp_rcpt_to; 1257 1258 char *dispatcher; 1259 }; 1260 1261 1262 /* aliases.c */ 1263 int aliases_get(struct expand *, const char *); 1264 int aliases_virtual_get(struct expand *, const struct mailaddr *); 1265 1266 1267 /* bounce.c */ 1268 void bounce_add(uint64_t); 1269 void bounce_fd(int); 1270 1271 1272 /* ca.c */ 1273 int ca(void); 1274 int ca_X509_verify(void *, void *, const char *, const char *, const char **); 1275 void ca_imsg(struct mproc *, struct imsg *); 1276 void ca_init(void); 1277 void ca_engine_init(void); 1278 1279 1280 /* compress_backend.c */ 1281 struct compress_backend *compress_backend_lookup(const char *); 1282 size_t compress_chunk(void *, size_t, void *, size_t); 1283 size_t uncompress_chunk(void *, size_t, void *, size_t); 1284 int compress_file(FILE *, FILE *); 1285 int uncompress_file(FILE *, FILE *); 1286 1287 /* config.c */ 1288 #define PURGE_LISTENERS 0x01 1289 #define PURGE_TABLES 0x02 1290 #define PURGE_RULES 0x04 1291 #define PURGE_PKI 0x08 1292 #define PURGE_PKI_KEYS 0x10 1293 #define PURGE_DISPATCHERS 0x20 1294 #define PURGE_EVERYTHING 0xff 1295 struct smtpd *config_default(void); 1296 void purge_config(uint8_t); 1297 void config_process(enum smtp_proc_type); 1298 void config_peer(enum smtp_proc_type); 1299 1300 1301 /* control.c */ 1302 int control(void); 1303 int control_create_socket(void); 1304 1305 1306 /* crypto.c */ 1307 int crypto_setup(const char *, size_t); 1308 int crypto_encrypt_file(FILE *, FILE *); 1309 int crypto_decrypt_file(FILE *, FILE *); 1310 size_t crypto_encrypt_buffer(const char *, size_t, char *, size_t); 1311 size_t crypto_decrypt_buffer(const char *, size_t, char *, size_t); 1312 1313 1314 /* dns.c */ 1315 void dns_imsg(struct mproc *, struct imsg *); 1316 1317 1318 /* enqueue.c */ 1319 int enqueue(int, char **, FILE *); 1320 1321 1322 /* envelope.c */ 1323 void envelope_set_errormsg(struct envelope *, char *, ...) 1324 __attribute__((__format__ (printf, 2, 3))); 1325 void envelope_set_esc_class(struct envelope *, enum enhanced_status_class); 1326 void envelope_set_esc_code(struct envelope *, enum enhanced_status_code); 1327 int envelope_load_buffer(struct envelope *, const char *, size_t); 1328 int envelope_dump_buffer(const struct envelope *, char *, size_t); 1329 1330 1331 /* expand.c */ 1332 int expand_cmp(struct expandnode *, struct expandnode *); 1333 void expand_insert(struct expand *, struct expandnode *); 1334 struct expandnode *expand_lookup(struct expand *, struct expandnode *); 1335 void expand_clear(struct expand *); 1336 void expand_free(struct expand *); 1337 int expand_line(struct expand *, const char *, int); 1338 int expand_to_text(struct expand *, char *, size_t); 1339 RB_PROTOTYPE(expandtree, expandnode, nodes, expand_cmp); 1340 1341 1342 /* forward.c */ 1343 int forwards_get(int, struct expand *); 1344 1345 1346 /* limit.c */ 1347 void limit_mta_set_defaults(struct mta_limits *); 1348 int limit_mta_set(struct mta_limits *, const char*, int64_t); 1349 1350 1351 /* lka.c */ 1352 int lka(void); 1353 1354 1355 /* lka_proc.c */ 1356 int lka_proc_ready(void); 1357 void lka_proc_forked(const char *, uint32_t, int); 1358 void lka_proc_errfd(const char *, int); 1359 struct io *lka_proc_get_io(const char *); 1360 1361 1362 /* lka_report.c */ 1363 void lka_report_init(void); 1364 void lka_report_register_hook(const char *, const char *); 1365 void lka_report_smtp_link_connect(const char *, struct timeval *, uint64_t, const char *, int, 1366 const struct sockaddr_storage *, const struct sockaddr_storage *); 1367 void lka_report_smtp_link_disconnect(const char *, struct timeval *, uint64_t); 1368 void lka_report_smtp_link_greeting(const char *, uint64_t, struct timeval *, 1369 const char *); 1370 void lka_report_smtp_link_identify(const char *, struct timeval *, uint64_t, const char *, const char *); 1371 void lka_report_smtp_link_tls(const char *, struct timeval *, uint64_t, const char *); 1372 void lka_report_smtp_link_auth(const char *, struct timeval *, uint64_t, const char *, const char *); 1373 void lka_report_smtp_tx_reset(const char *, struct timeval *, uint64_t, uint32_t); 1374 void lka_report_smtp_tx_begin(const char *, struct timeval *, uint64_t, uint32_t); 1375 void lka_report_smtp_tx_mail(const char *, struct timeval *, uint64_t, uint32_t, const char *, int); 1376 void lka_report_smtp_tx_rcpt(const char *, struct timeval *, uint64_t, uint32_t, const char *, int); 1377 void lka_report_smtp_tx_envelope(const char *, struct timeval *, uint64_t, uint32_t, uint64_t); 1378 void lka_report_smtp_tx_commit(const char *, struct timeval *, uint64_t, uint32_t, size_t); 1379 void lka_report_smtp_tx_data(const char *, struct timeval *, uint64_t, uint32_t, int); 1380 void lka_report_smtp_tx_rollback(const char *, struct timeval *, uint64_t, uint32_t); 1381 void lka_report_smtp_protocol_client(const char *, struct timeval *, uint64_t, const char *); 1382 void lka_report_smtp_protocol_server(const char *, struct timeval *, uint64_t, const char *); 1383 void lka_report_smtp_filter_response(const char *, struct timeval *, uint64_t, 1384 int, int, const char *); 1385 void lka_report_smtp_timeout(const char *, struct timeval *, uint64_t); 1386 void lka_report_filter_report(uint64_t, const char *, int, const char *, 1387 struct timeval *, const char *); 1388 void lka_report_proc(const char *, const char *); 1389 1390 1391 /* lka_filter.c */ 1392 void lka_filter_init(void); 1393 void lka_filter_register_hook(const char *, const char *); 1394 void lka_filter_ready(void); 1395 int lka_filter_proc_in_session(uint64_t, const char *); 1396 void lka_filter_begin(uint64_t, const char *); 1397 void lka_filter_end(uint64_t); 1398 void lka_filter_protocol(uint64_t, enum filter_phase, const char *); 1399 void lka_filter_data_begin(uint64_t); 1400 void lka_filter_data_end(uint64_t); 1401 1402 1403 /* lka_session.c */ 1404 void lka_session(uint64_t, struct envelope *); 1405 void lka_session_forward_reply(struct forward_req *, int); 1406 1407 1408 /* log.c */ 1409 void vlog(int, const char *, va_list); 1410 void logit(int, const char *, ...) __attribute__((format (printf, 2, 3))); 1411 1412 1413 /* mda.c */ 1414 void mda_postfork(void); 1415 void mda_postprivdrop(void); 1416 void mda_imsg(struct mproc *, struct imsg *); 1417 1418 1419 /* mda_mbox.c */ 1420 void mda_mbox_init(struct deliver *); 1421 void mda_mbox(struct deliver *); 1422 1423 1424 /* mda_unpriv.c */ 1425 void mda_unpriv(struct dispatcher *, struct deliver *, const char *, const char *); 1426 1427 1428 /* mda_variables.c */ 1429 ssize_t mda_expand_format(char *, size_t, const struct deliver *, 1430 const struct userinfo *, const char *); 1431 1432 1433 /* makemap.c */ 1434 int makemap(int, int, char **); 1435 1436 1437 /* mailaddr.c */ 1438 int mailaddr_line(struct maddrmap *, const char *); 1439 void maddrmap_init(struct maddrmap *); 1440 void maddrmap_insert(struct maddrmap *, struct maddrnode *); 1441 void maddrmap_free(struct maddrmap *); 1442 1443 1444 /* mproc.c */ 1445 int mproc_fork(struct mproc *, const char*, char **); 1446 void mproc_init(struct mproc *, int); 1447 void mproc_clear(struct mproc *); 1448 void mproc_enable(struct mproc *); 1449 void mproc_disable(struct mproc *); 1450 void mproc_event_add(struct mproc *); 1451 void m_compose(struct mproc *, uint32_t, uint32_t, pid_t, int, void *, size_t); 1452 void m_composev(struct mproc *, uint32_t, uint32_t, pid_t, int, 1453 const struct iovec *, int); 1454 void m_forward(struct mproc *, struct imsg *); 1455 void m_create(struct mproc *, uint32_t, uint32_t, pid_t, int); 1456 void m_add(struct mproc *, const void *, size_t); 1457 void m_add_int(struct mproc *, int); 1458 void m_add_u32(struct mproc *, uint32_t); 1459 void m_add_size(struct mproc *, size_t); 1460 void m_add_time(struct mproc *, time_t); 1461 void m_add_timeval(struct mproc *, struct timeval *tv); 1462 void m_add_string(struct mproc *, const char *); 1463 void m_add_data(struct mproc *, const void *, size_t); 1464 void m_add_evpid(struct mproc *, uint64_t); 1465 void m_add_msgid(struct mproc *, uint32_t); 1466 void m_add_id(struct mproc *, uint64_t); 1467 void m_add_sockaddr(struct mproc *, const struct sockaddr *); 1468 void m_add_mailaddr(struct mproc *, const struct mailaddr *); 1469 void m_add_envelope(struct mproc *, const struct envelope *); 1470 void m_add_params(struct mproc *, struct dict *); 1471 void m_close(struct mproc *); 1472 void m_flush(struct mproc *); 1473 1474 void m_msg(struct msg *, struct imsg *); 1475 int m_is_eom(struct msg *); 1476 void m_end(struct msg *); 1477 void m_get_int(struct msg *, int *); 1478 void m_get_size(struct msg *, size_t *); 1479 void m_get_u32(struct msg *, uint32_t *); 1480 void m_get_time(struct msg *, time_t *); 1481 void m_get_timeval(struct msg *, struct timeval *); 1482 void m_get_string(struct msg *, const char **); 1483 void m_get_data(struct msg *, const void **, size_t *); 1484 void m_get_evpid(struct msg *, uint64_t *); 1485 void m_get_msgid(struct msg *, uint32_t *); 1486 void m_get_id(struct msg *, uint64_t *); 1487 void m_get_sockaddr(struct msg *, struct sockaddr *); 1488 void m_get_mailaddr(struct msg *, struct mailaddr *); 1489 void m_get_envelope(struct msg *, struct envelope *); 1490 void m_get_params(struct msg *, struct dict *); 1491 void m_clear_params(struct dict *); 1492 1493 1494 /* mta.c */ 1495 void mta_postfork(void); 1496 void mta_postprivdrop(void); 1497 void mta_imsg(struct mproc *, struct imsg *); 1498 void mta_route_ok(struct mta_relay *, struct mta_route *); 1499 void mta_route_error(struct mta_relay *, struct mta_route *); 1500 void mta_route_down(struct mta_relay *, struct mta_route *); 1501 void mta_route_collect(struct mta_relay *, struct mta_route *); 1502 void mta_source_error(struct mta_relay *, struct mta_route *, const char *); 1503 void mta_delivery_log(struct mta_envelope *, const char *, const char *, int, const char *); 1504 void mta_delivery_notify(struct mta_envelope *); 1505 struct mta_task *mta_route_next_task(struct mta_relay *, struct mta_route *); 1506 const char *mta_host_to_text(struct mta_host *); 1507 const char *mta_relay_to_text(struct mta_relay *); 1508 1509 1510 /* mta_session.c */ 1511 void mta_session(struct mta_relay *, struct mta_route *, const char *); 1512 void mta_session_imsg(struct mproc *, struct imsg *); 1513 1514 1515 /* parse.y */ 1516 int parse_config(struct smtpd *, const char *, int); 1517 int cmdline_symset(char *); 1518 1519 1520 /* queue.c */ 1521 int queue(void); 1522 1523 1524 /* queue_backend.c */ 1525 uint32_t queue_generate_msgid(void); 1526 uint64_t queue_generate_evpid(uint32_t); 1527 int queue_init(const char *, int); 1528 int queue_close(void); 1529 int queue_message_create(uint32_t *); 1530 int queue_message_delete(uint32_t); 1531 int queue_message_commit(uint32_t); 1532 int queue_message_fd_r(uint32_t); 1533 int queue_message_fd_rw(uint32_t); 1534 int queue_envelope_create(struct envelope *); 1535 int queue_envelope_delete(uint64_t); 1536 int queue_envelope_load(uint64_t, struct envelope *); 1537 int queue_envelope_update(struct envelope *); 1538 int queue_envelope_walk(struct envelope *); 1539 int queue_message_walk(struct envelope *, uint32_t, int *, void **); 1540 1541 1542 /* report_smtp.c */ 1543 void report_smtp_link_connect(const char *, uint64_t, const char *, int, 1544 const struct sockaddr_storage *, const struct sockaddr_storage *); 1545 void report_smtp_link_disconnect(const char *, uint64_t); 1546 void report_smtp_link_greeting(const char *, uint64_t, const char *); 1547 void report_smtp_link_identify(const char *, uint64_t, const char *, const char *); 1548 void report_smtp_link_tls(const char *, uint64_t, const char *); 1549 void report_smtp_link_auth(const char *, uint64_t, const char *, const char *); 1550 void report_smtp_tx_reset(const char *, uint64_t, uint32_t); 1551 void report_smtp_tx_begin(const char *, uint64_t, uint32_t); 1552 void report_smtp_tx_mail(const char *, uint64_t, uint32_t, const char *, int); 1553 void report_smtp_tx_rcpt(const char *, uint64_t, uint32_t, const char *, int); 1554 void report_smtp_tx_envelope(const char *, uint64_t, uint32_t, uint64_t); 1555 void report_smtp_tx_data(const char *, uint64_t, uint32_t, int); 1556 void report_smtp_tx_commit(const char *, uint64_t, uint32_t, size_t); 1557 void report_smtp_tx_rollback(const char *, uint64_t, uint32_t); 1558 void report_smtp_protocol_client(const char *, uint64_t, const char *); 1559 void report_smtp_protocol_server(const char *, uint64_t, const char *); 1560 void report_smtp_filter_response(const char *, uint64_t, int, int, const char *); 1561 void report_smtp_timeout(const char *, uint64_t); 1562 1563 1564 /* ruleset.c */ 1565 struct rule *ruleset_match(const struct envelope *); 1566 1567 1568 /* scheduler.c */ 1569 int scheduler(void); 1570 1571 1572 /* scheduler_bakend.c */ 1573 struct scheduler_backend *scheduler_backend_lookup(const char *); 1574 void scheduler_info(struct scheduler_info *, struct envelope *); 1575 1576 1577 /* dispatcher.c */ 1578 int dispatcher(void); 1579 void dispatcher_imsg(struct mproc *, struct imsg *); 1580 1581 1582 /* resolver.c */ 1583 void resolver_getaddrinfo(const char *, const char *, const struct addrinfo *, 1584 void(*)(void *, int, struct addrinfo*), void *); 1585 void resolver_getnameinfo(const struct sockaddr *, int, 1586 void(*)(void *, int, const char *, const char *), void *); 1587 void resolver_res_query(const char *, int, int, 1588 void (*cb)(void *, int, int, int, const void *, int), void *); 1589 void resolver_dispatch_request(struct mproc *, struct imsg *); 1590 void resolver_dispatch_result(struct mproc *, struct imsg *); 1591 1592 1593 /* smtp.c */ 1594 void smtp_postfork(void); 1595 void smtp_postprivdrop(void); 1596 void smtp_imsg(struct mproc *, struct imsg *); 1597 void smtp_configure(void); 1598 void smtp_collect(void); 1599 1600 1601 /* smtp_session.c */ 1602 int smtp_session(struct listener *, int, const struct sockaddr_storage *, 1603 const char *, struct io *); 1604 void smtp_session_imsg(struct mproc *, struct imsg *); 1605 1606 1607 /* smtpd.c */ 1608 void imsg_dispatch(struct mproc *, struct imsg *); 1609 const char *proc_name(enum smtp_proc_type); 1610 const char *proc_title(enum smtp_proc_type); 1611 const char *imsg_to_str(int); 1612 void log_imsg(int, int, struct imsg *); 1613 int fork_proc_backend(const char *, const char *, const char *, int); 1614 1615 1616 /* srs.c */ 1617 const char *srs_encode(const char *, const char *); 1618 const char *srs_decode(const char *); 1619 1620 1621 /* stat_backend.c */ 1622 struct stat_backend *stat_backend_lookup(const char *); 1623 void stat_increment(const char *, size_t); 1624 void stat_decrement(const char *, size_t); 1625 void stat_set(const char *, const struct stat_value *); 1626 struct stat_value *stat_counter(size_t); 1627 struct stat_value *stat_timestamp(time_t); 1628 struct stat_value *stat_timeval(struct timeval *); 1629 struct stat_value *stat_timespec(struct timespec *); 1630 1631 1632 /* table.c */ 1633 const char *table_service_name(enum table_service); 1634 int table_service_from_name(const char *); 1635 struct table *table_find(struct smtpd *, const char *); 1636 struct table *table_create(struct smtpd *, const char *, const char *, 1637 const char *); 1638 int table_config(struct table *); 1639 int table_open(struct table *); 1640 int table_update(struct table *); 1641 void table_close(struct table *); 1642 void table_dump(struct table *); 1643 int table_check_use(struct table *, uint32_t, uint32_t); 1644 int table_check_type(struct table *, uint32_t); 1645 int table_check_service(struct table *, uint32_t); 1646 int table_match(struct table *, enum table_service, const char *); 1647 int table_lookup(struct table *, enum table_service, const char *, 1648 union lookup *); 1649 int table_fetch(struct table *, enum table_service, union lookup *); 1650 void table_destroy(struct smtpd *, struct table *); 1651 void table_add(struct table *, const char *, const char *); 1652 int table_domain_match(const char *, const char *); 1653 int table_netaddr_match(const char *, const char *); 1654 int table_mailaddr_match(const char *, const char *); 1655 int table_regex_match(const char *, const char *); 1656 void table_open_all(struct smtpd *); 1657 void table_dump_all(struct smtpd *); 1658 void table_close_all(struct smtpd *); 1659 1660 1661 /* to.c */ 1662 int text_to_netaddr(struct netaddr *, const char *); 1663 int text_to_mailaddr(struct mailaddr *, const char *); 1664 int text_to_relayhost(struct relayhost *, const char *); 1665 int text_to_userinfo(struct userinfo *, const char *); 1666 int text_to_credentials(struct credentials *, const char *); 1667 int text_to_expandnode(struct expandnode *, const char *); 1668 uint64_t text_to_evpid(const char *); 1669 uint32_t text_to_msgid(const char *); 1670 const char *sa_to_text(const struct sockaddr *); 1671 const char *ss_to_text(const struct sockaddr_storage *); 1672 const char *time_to_text(time_t); 1673 const char *duration_to_text(time_t); 1674 const char *rule_to_text(struct rule *); 1675 const char *sockaddr_to_text(const struct sockaddr *); 1676 const char *mailaddr_to_text(const struct mailaddr *); 1677 const char *expandnode_to_text(struct expandnode *); 1678 const char *tls_to_text(struct tls *); 1679 1680 1681 /* util.c */ 1682 typedef struct arglist arglist; 1683 struct arglist { 1684 char **list; 1685 uint num; 1686 uint nalloc; 1687 }; 1688 void addargs(arglist *, char *, ...) 1689 __attribute__((format(printf, 2, 3))); 1690 int bsnprintf(char *, size_t, const char *, ...) 1691 __attribute__((format (printf, 3, 4))); 1692 int safe_fclose(FILE *); 1693 int hostname_match(const char *, const char *); 1694 int mailaddr_match(const struct mailaddr *, const struct mailaddr *); 1695 int valid_localpart(const char *); 1696 int valid_domainpart(const char *); 1697 int valid_domainname(const char *); 1698 int valid_smtp_response(const char *); 1699 int valid_xtext(const char *); 1700 int secure_file(int, char *, char *, uid_t, int); 1701 int lowercase(char *, const char *, size_t); 1702 void xlowercase(char *, const char *, size_t); 1703 int uppercase(char *, const char *, size_t); 1704 uint64_t generate_uid(void); 1705 int ckdir(const char *, mode_t, uid_t, gid_t, int); 1706 int rmtree(char *, int); 1707 int mvpurge(char *, char *); 1708 int mktmpfile(void); 1709 const char *parse_smtp_response(char *, size_t, char **, int *); 1710 int xasprintf(char **, const char *, ...) 1711 __attribute__((__format__ (printf, 2, 3))); 1712 void *xmalloc(size_t); 1713 void *xcalloc(size_t, size_t); 1714 char *xstrdup(const char *); 1715 void *xmemdup(const void *, size_t); 1716 char *strip(char *); 1717 int io_xprint(struct io *, const char *); 1718 int io_xprintf(struct io *, const char *, ...) 1719 __attribute__((__format__ (printf, 2, 3))); 1720 int session_socket_error(int); 1721 int getmailname(char *, size_t); 1722 int base64_encode(unsigned char const *, size_t, char *, size_t); 1723 int base64_decode(char const *, unsigned char *, size_t); 1724 int base64_encode_rfc3548(unsigned char const *, size_t, 1725 char *, size_t); 1726 1727 void log_trace_verbose(int); 1728 void log_trace0(const char *, ...) 1729 __attribute__((format (printf, 1, 2))); 1730 #define log_trace(m, ...) do { if (tracing & (m)) log_trace0(__VA_ARGS__); } while (0) 1731 1732 int parse_table_line(FILE *, char **, size_t *, int *, 1733 char **, char **, int *); 1734 1735 /* waitq.c */ 1736 int waitq_wait(void *, void (*)(void *, void *, void *), void *); 1737 void waitq_run(void *, void *); 1738 1739 1740 /* runq.c */ 1741 struct runq; 1742 1743 int runq_init(struct runq **, void (*)(struct runq *, void *)); 1744 int runq_schedule(struct runq *, time_t, void *); 1745 int runq_schedule_at(struct runq *, time_t, void *); 1746 int runq_cancel(struct runq *, void *); 1747 int runq_pending(struct runq *, void *, time_t *); 1748