1 /* $OpenBSD: smtpd.h,v 1.684 2024/05/07 12:10:06 op 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 "7.5.0" 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 void *t_handle; 360 struct table_backend *t_backend; 361 }; 362 363 struct table_backend { 364 const char *name; 365 const unsigned int services; 366 int (*config)(struct table *); 367 int (*add)(struct table *, const char *, const char *); 368 void (*dump)(struct table *); 369 int (*open)(struct table *); 370 int (*update)(struct table *); 371 void (*close)(struct table *); 372 int (*lookup)(struct table *, enum table_service, const char *, char **); 373 int (*fetch)(struct table *, enum table_service, char **); 374 }; 375 376 377 enum bounce_type { 378 B_FAILED, 379 B_DELAYED, 380 B_DELIVERED 381 }; 382 383 enum dsn_ret { 384 DSN_RETFULL = 1, 385 DSN_RETHDRS 386 }; 387 388 struct delivery_bounce { 389 enum bounce_type type; 390 time_t delay; 391 time_t ttl; 392 enum dsn_ret dsn_ret; 393 int mta_without_dsn; 394 }; 395 396 enum expand_type { 397 EXPAND_INVALID, 398 EXPAND_USERNAME, 399 EXPAND_FILENAME, 400 EXPAND_FILTER, 401 EXPAND_INCLUDE, 402 EXPAND_ADDRESS, 403 EXPAND_ERROR, 404 }; 405 406 enum filter_phase { 407 FILTER_CONNECT, 408 FILTER_HELO, 409 FILTER_EHLO, 410 FILTER_STARTTLS, 411 FILTER_AUTH, 412 FILTER_MAIL_FROM, 413 FILTER_RCPT_TO, 414 FILTER_DATA, 415 FILTER_DATA_LINE, 416 FILTER_RSET, 417 FILTER_QUIT, 418 FILTER_NOOP, 419 FILTER_HELP, 420 FILTER_WIZ, 421 FILTER_COMMIT, 422 FILTER_PHASES_COUNT /* must be last */ 423 }; 424 425 struct expandnode { 426 RB_ENTRY(expandnode) entry; 427 TAILQ_ENTRY(expandnode) tq_entry; 428 enum expand_type type; 429 int sameuser; 430 int realuser; 431 uid_t realuser_uid; 432 int forwarded; 433 struct rule *rule; 434 struct expandnode *parent; 435 unsigned int depth; 436 union { 437 /* 438 * user field handles both expansion user and system user 439 * so we MUST make it large enough to fit a mailaddr user 440 */ 441 char user[SMTPD_MAXLOCALPARTSIZE]; 442 char buffer[EXPAND_BUFFER]; 443 struct mailaddr mailaddr; 444 } u; 445 char subaddress[SMTPD_SUBADDRESS_SIZE]; 446 }; 447 448 struct expand { 449 RB_HEAD(expandtree, expandnode) tree; 450 TAILQ_HEAD(xnodes, expandnode) *queue; 451 size_t nb_nodes; 452 struct rule *rule; 453 struct expandnode *parent; 454 }; 455 456 struct maddrnode { 457 TAILQ_ENTRY(maddrnode) entries; 458 struct mailaddr mailaddr; 459 }; 460 461 struct maddrmap { 462 TAILQ_HEAD(xmaddr, maddrnode) queue; 463 }; 464 465 #define DSN_SUCCESS 0x01 466 #define DSN_FAILURE 0x02 467 #define DSN_DELAY 0x04 468 #define DSN_NEVER 0x08 469 470 #define DSN_ENVID_LEN 100 471 #define DSN_ORCPT_LEN 500 472 473 #define SMTPD_ENVELOPE_VERSION 3 474 struct envelope { 475 TAILQ_ENTRY(envelope) entry; 476 477 char dispatcher[HOST_NAME_MAX+1]; 478 479 char tag[SMTPD_TAG_SIZE]; 480 481 uint32_t version; 482 uint64_t id; 483 enum envelope_flags flags; 484 485 char smtpname[HOST_NAME_MAX+1]; 486 char helo[HOST_NAME_MAX+1]; 487 char hostname[HOST_NAME_MAX+1]; 488 char username[SMTPD_MAXMAILADDRSIZE]; 489 char errorline[LINE_MAX]; 490 struct sockaddr_storage ss; 491 492 struct mailaddr sender; 493 struct mailaddr rcpt; 494 struct mailaddr dest; 495 496 char mda_user[SMTPD_VUSERNAME_SIZE]; 497 char mda_subaddress[SMTPD_SUBADDRESS_SIZE]; 498 char mda_exec[LINE_MAX]; 499 500 enum delivery_type type; 501 union { 502 struct delivery_bounce bounce; 503 } agent; 504 505 uint16_t retry; 506 time_t creation; 507 time_t ttl; 508 time_t lasttry; 509 time_t nexttry; 510 time_t lastbounce; 511 512 char dsn_orcpt[DSN_ORCPT_LEN+1]; 513 char dsn_envid[DSN_ENVID_LEN+1]; 514 uint8_t dsn_notify; 515 enum dsn_ret dsn_ret; 516 517 uint8_t esc_class; 518 uint8_t esc_code; 519 }; 520 521 struct listener { 522 uint16_t flags; 523 int fd; 524 struct sockaddr_storage ss; 525 in_port_t port; 526 struct timeval timeout; 527 struct event ev; 528 char filter_name[PATH_MAX]; 529 char pki_name[PATH_MAX]; 530 char ca_name[PATH_MAX]; 531 char tag[SMTPD_TAG_SIZE]; 532 char authtable[LINE_MAX]; 533 char hostname[HOST_NAME_MAX+1]; 534 char hostnametable[PATH_MAX]; 535 char sendertable[PATH_MAX]; 536 537 TAILQ_ENTRY(listener) entry; 538 539 int local; /* there must be a better way */ 540 541 char *tls_protocols; 542 char *tls_ciphers; 543 struct tls *tls; 544 struct pki **pki; 545 int pkicount; 546 }; 547 548 struct smtpd { 549 char sc_conffile[PATH_MAX]; 550 size_t sc_maxsize; 551 552 #define SMTPD_OPT_VERBOSE 0x00000001 553 #define SMTPD_OPT_NOACTION 0x00000002 554 uint32_t sc_opts; 555 556 #define SMTPD_EXITING 0x00000001 /* unused */ 557 #define SMTPD_MDA_PAUSED 0x00000002 558 #define SMTPD_MTA_PAUSED 0x00000004 559 #define SMTPD_SMTP_PAUSED 0x00000008 560 #define SMTPD_MDA_BUSY 0x00000010 561 #define SMTPD_MTA_BUSY 0x00000020 562 #define SMTPD_BOUNCE_BUSY 0x00000040 563 #define SMTPD_SMTP_DISABLED 0x00000080 564 uint32_t sc_flags; 565 566 #define QUEUE_COMPRESSION 0x00000001 567 #define QUEUE_ENCRYPTION 0x00000002 568 #define QUEUE_EVPCACHE 0x00000004 569 uint32_t sc_queue_flags; 570 char *sc_queue_key; 571 size_t sc_queue_evpcache_size; 572 573 size_t sc_session_max_rcpt; 574 size_t sc_session_max_mails; 575 576 struct dict *sc_mda_wrappers; 577 size_t sc_mda_max_session; 578 size_t sc_mda_max_user_session; 579 size_t sc_mda_task_hiwat; 580 size_t sc_mda_task_lowat; 581 size_t sc_mda_task_release; 582 583 size_t sc_mta_max_deferred; 584 585 size_t sc_scheduler_max_inflight; 586 size_t sc_scheduler_max_evp_batch_size; 587 size_t sc_scheduler_max_msg_batch_size; 588 size_t sc_scheduler_max_schedule; 589 590 struct dict *sc_filter_processes_dict; 591 592 int sc_ttl; 593 #define MAX_BOUNCE_WARN 4 594 time_t sc_bounce_warn[MAX_BOUNCE_WARN]; 595 char sc_hostname[HOST_NAME_MAX+1]; 596 struct stat_backend *sc_stat; 597 struct compress_backend *sc_comp; 598 599 time_t sc_uptime; 600 601 /* This is a listener for a local socket used by smtp_enqueue(). */ 602 struct listener *sc_sock_listener; 603 604 TAILQ_HEAD(listenerlist, listener) *sc_listeners; 605 606 TAILQ_HEAD(rulelist, rule) *sc_rules; 607 608 609 struct dict *sc_filters_dict; 610 struct dict *sc_dispatchers; 611 struct dispatcher *sc_dispatcher_bounce; 612 613 struct dict *sc_ca_dict; 614 struct dict *sc_pki_dict; 615 struct dict *sc_ssl_dict; 616 617 struct dict *sc_tables_dict; /* keyed lookup */ 618 619 struct dict *sc_limits_dict; 620 621 char *sc_tls_ciphers; 622 623 char *sc_subaddressing_delim; 624 625 char *sc_srs_key; 626 char *sc_srs_key_backup; 627 int sc_srs_ttl; 628 629 char *sc_admd; 630 }; 631 632 #define TRACE_DEBUG 0x0001 633 #define TRACE_IMSG 0x0002 634 #define TRACE_IO 0x0004 635 #define TRACE_SMTP 0x0008 636 #define TRACE_FILTERS 0x0010 637 #define TRACE_MTA 0x0020 638 #define TRACE_BOUNCE 0x0040 639 #define TRACE_SCHEDULER 0x0080 640 #define TRACE_LOOKUP 0x0100 641 #define TRACE_STAT 0x0200 642 #define TRACE_RULES 0x0400 643 #define TRACE_MPROC 0x0800 644 #define TRACE_EXPAND 0x1000 645 #define TRACE_TABLES 0x2000 646 #define TRACE_QUEUE 0x4000 647 648 #define PROFILE_TOSTAT 0x0001 649 #define PROFILE_IMSG 0x0002 650 #define PROFILE_QUEUE 0x0004 651 652 struct forward_req { 653 uint64_t id; 654 uint8_t status; 655 656 char user[SMTPD_VUSERNAME_SIZE]; 657 uid_t uid; 658 gid_t gid; 659 char directory[PATH_MAX]; 660 }; 661 662 struct deliver { 663 char dispatcher[EXPAND_BUFFER]; 664 665 struct mailaddr sender; 666 struct mailaddr rcpt; 667 struct mailaddr dest; 668 669 char mda_subaddress[SMTPD_SUBADDRESS_SIZE]; 670 char mda_exec[LINE_MAX]; 671 672 struct userinfo userinfo; 673 }; 674 675 struct mta_host { 676 SPLAY_ENTRY(mta_host) entry; 677 struct sockaddr *sa; 678 char *ptrname; 679 int refcount; 680 size_t nconn; 681 time_t lastconn; 682 time_t lastptrquery; 683 684 #define HOST_IGNORE 0x01 685 int flags; 686 }; 687 688 struct mta_mx { 689 TAILQ_ENTRY(mta_mx) entry; 690 struct mta_host *host; 691 char *mxname; 692 int preference; 693 }; 694 695 struct mta_domain { 696 SPLAY_ENTRY(mta_domain) entry; 697 char *name; 698 int as_host; 699 TAILQ_HEAD(, mta_mx) mxs; 700 int mxstatus; 701 int refcount; 702 size_t nconn; 703 time_t lastconn; 704 time_t lastmxquery; 705 }; 706 707 struct mta_source { 708 SPLAY_ENTRY(mta_source) entry; 709 struct sockaddr *sa; 710 int refcount; 711 size_t nconn; 712 time_t lastconn; 713 }; 714 715 struct mta_connector { 716 struct mta_source *source; 717 struct mta_relay *relay; 718 719 #define CONNECTOR_ERROR_FAMILY 0x0001 720 #define CONNECTOR_ERROR_SOURCE 0x0002 721 #define CONNECTOR_ERROR_MX 0x0004 722 #define CONNECTOR_ERROR_ROUTE_NET 0x0008 723 #define CONNECTOR_ERROR_ROUTE_SMTP 0x0010 724 #define CONNECTOR_ERROR_ROUTE 0x0018 725 #define CONNECTOR_ERROR_BLOCKED 0x0020 726 #define CONNECTOR_ERROR 0x00ff 727 728 #define CONNECTOR_LIMIT_HOST 0x0100 729 #define CONNECTOR_LIMIT_ROUTE 0x0200 730 #define CONNECTOR_LIMIT_SOURCE 0x0400 731 #define CONNECTOR_LIMIT_RELAY 0x0800 732 #define CONNECTOR_LIMIT_CONN 0x1000 733 #define CONNECTOR_LIMIT_DOMAIN 0x2000 734 #define CONNECTOR_LIMIT 0xff00 735 736 #define CONNECTOR_NEW 0x10000 737 #define CONNECTOR_WAIT 0x20000 738 int flags; 739 740 int refcount; 741 size_t nconn; 742 time_t lastconn; 743 }; 744 745 struct mta_route { 746 SPLAY_ENTRY(mta_route) entry; 747 uint64_t id; 748 struct mta_source *src; 749 struct mta_host *dst; 750 #define ROUTE_NEW 0x01 751 #define ROUTE_RUNQ 0x02 752 #define ROUTE_KEEPALIVE 0x04 753 #define ROUTE_DISABLED 0xf0 754 #define ROUTE_DISABLED_NET 0x10 755 #define ROUTE_DISABLED_SMTP 0x20 756 int flags; 757 int nerror; 758 int penalty; 759 int refcount; 760 size_t nconn; 761 time_t lastconn; 762 time_t lastdisc; 763 time_t lastpenalty; 764 }; 765 766 struct mta_limits { 767 size_t maxconn_per_host; 768 size_t maxconn_per_route; 769 size_t maxconn_per_source; 770 size_t maxconn_per_connector; 771 size_t maxconn_per_relay; 772 size_t maxconn_per_domain; 773 774 time_t conndelay_host; 775 time_t conndelay_route; 776 time_t conndelay_source; 777 time_t conndelay_connector; 778 time_t conndelay_relay; 779 time_t conndelay_domain; 780 781 time_t discdelay_route; 782 783 size_t max_mail_per_session; 784 time_t sessdelay_transaction; 785 time_t sessdelay_keepalive; 786 787 size_t max_failures_per_session; 788 789 int family; 790 791 int task_hiwat; 792 int task_lowat; 793 int task_release; 794 }; 795 796 struct mta_relay { 797 SPLAY_ENTRY(mta_relay) entry; 798 uint64_t id; 799 800 struct dispatcher *dispatcher; 801 struct mta_domain *domain; 802 struct mta_limits *limits; 803 int tls; 804 int flags; 805 char *backupname; 806 int backuppref; 807 char *sourcetable; 808 uint16_t port; 809 char *pki_name; 810 char *ca_name; 811 char *authtable; 812 char *authlabel; 813 char *helotable; 814 char *heloname; 815 char *secret; 816 int srs; 817 818 int state; 819 size_t ntask; 820 TAILQ_HEAD(, mta_task) tasks; 821 822 struct tree connectors; 823 size_t sourceloop; 824 time_t lastsource; 825 time_t nextsource; 826 827 int fail; 828 char *failstr; 829 830 #define RELAY_WAIT_MX 0x01 831 #define RELAY_WAIT_PREFERENCE 0x02 832 #define RELAY_WAIT_SECRET 0x04 833 #define RELAY_WAIT_LIMITS 0x08 834 #define RELAY_WAIT_SOURCE 0x10 835 #define RELAY_WAIT_CONNECTOR 0x20 836 #define RELAY_WAIT_SMARTHOST 0x40 837 #define RELAY_WAITMASK 0x7f 838 int status; 839 840 int refcount; 841 size_t nconn; 842 size_t nconn_ready; 843 time_t lastconn; 844 }; 845 846 struct mta_envelope { 847 TAILQ_ENTRY(mta_envelope) entry; 848 uint64_t id; 849 uint64_t session; 850 time_t creation; 851 char *smtpname; 852 char *dest; 853 char *rcpt; 854 struct mta_task *task; 855 int delivery; 856 857 int ext; 858 char *dsn_orcpt; 859 char dsn_envid[DSN_ENVID_LEN+1]; 860 uint8_t dsn_notify; 861 enum dsn_ret dsn_ret; 862 863 char status[LINE_MAX]; 864 }; 865 866 struct mta_task { 867 TAILQ_ENTRY(mta_task) entry; 868 struct mta_relay *relay; 869 uint32_t msgid; 870 TAILQ_HEAD(, mta_envelope) envelopes; 871 char *sender; 872 }; 873 874 struct passwd; 875 876 struct queue_backend { 877 int (*init)(struct passwd *, int, const char *); 878 }; 879 880 struct compress_backend { 881 size_t (*compress_chunk)(void *, size_t, void *, size_t); 882 size_t (*uncompress_chunk)(void *, size_t, void *, size_t); 883 int (*compress_file)(FILE *, FILE *); 884 int (*uncompress_file)(FILE *, FILE *); 885 }; 886 887 /* auth structures */ 888 enum auth_type { 889 AUTH_BSD, 890 AUTH_PWD, 891 }; 892 893 struct auth_backend { 894 int (*authenticate)(char *, char *); 895 }; 896 897 struct scheduler_backend { 898 int (*init)(const char *); 899 900 int (*insert)(struct scheduler_info *); 901 size_t (*commit)(uint32_t); 902 size_t (*rollback)(uint32_t); 903 904 int (*update)(struct scheduler_info *); 905 int (*delete)(uint64_t); 906 int (*hold)(uint64_t, uint64_t); 907 int (*release)(int, uint64_t, int); 908 909 int (*batch)(int, int*, size_t*, uint64_t*, int*); 910 911 size_t (*messages)(uint32_t, uint32_t *, size_t); 912 size_t (*envelopes)(uint64_t, struct evpstate *, size_t); 913 int (*schedule)(uint64_t); 914 int (*remove)(uint64_t); 915 int (*suspend)(uint64_t); 916 int (*resume)(uint64_t); 917 int (*query)(uint64_t); 918 }; 919 920 enum stat_type { 921 STAT_COUNTER, 922 STAT_TIMESTAMP, 923 STAT_TIMEVAL, 924 STAT_TIMESPEC, 925 }; 926 927 struct stat_value { 928 enum stat_type type; 929 union stat_v { 930 size_t counter; 931 time_t timestamp; 932 struct timeval tv; 933 struct timespec ts; 934 } u; 935 }; 936 937 #define STAT_KEY_SIZE 1024 938 struct stat_kv { 939 void *iter; 940 char key[STAT_KEY_SIZE]; 941 struct stat_value val; 942 }; 943 944 struct stat_backend { 945 void (*init)(void); 946 void (*close)(void); 947 void (*increment)(const char *, size_t); 948 void (*decrement)(const char *, size_t); 949 void (*set)(const char *, const struct stat_value *); 950 int (*iter)(void **, char **, struct stat_value *); 951 }; 952 953 struct stat_digest { 954 time_t startup; 955 time_t timestamp; 956 957 size_t clt_connect; 958 size_t clt_disconnect; 959 960 size_t evp_enqueued; 961 size_t evp_dequeued; 962 963 size_t evp_expired; 964 size_t evp_removed; 965 size_t evp_bounce; 966 967 size_t dlv_ok; 968 size_t dlv_permfail; 969 size_t dlv_tempfail; 970 size_t dlv_loop; 971 }; 972 973 974 struct mproc { 975 pid_t pid; 976 char *name; 977 int proc; 978 void (*handler)(struct mproc *, struct imsg *); 979 struct imsgbuf imsgbuf; 980 981 char *m_buf; 982 size_t m_alloc; 983 size_t m_pos; 984 uint32_t m_type; 985 uint32_t m_peerid; 986 pid_t m_pid; 987 int m_fd; 988 989 int enable; 990 short events; 991 struct event ev; 992 void *data; 993 }; 994 995 struct msg { 996 const uint8_t *pos; 997 const uint8_t *end; 998 }; 999 1000 extern enum smtp_proc_type smtpd_process; 1001 1002 extern int tracing; 1003 extern int foreground_log; 1004 extern int profiling; 1005 1006 extern struct mproc *p_control; 1007 extern struct mproc *p_parent; 1008 extern struct mproc *p_lka; 1009 extern struct mproc *p_queue; 1010 extern struct mproc *p_scheduler; 1011 extern struct mproc *p_dispatcher; 1012 extern struct mproc *p_ca; 1013 1014 extern struct smtpd *env; 1015 extern void (*imsg_callback)(struct mproc *, struct imsg *); 1016 1017 /* inter-process structures */ 1018 1019 struct bounce_req_msg { 1020 uint64_t evpid; 1021 time_t timestamp; 1022 struct delivery_bounce bounce; 1023 }; 1024 1025 enum dns_error { 1026 DNS_OK = 0, 1027 DNS_RETRY, 1028 DNS_EINVAL, 1029 DNS_ENONAME, 1030 DNS_ENOTFOUND, 1031 /* RFC 7505 */ 1032 DNS_NULLMX, 1033 }; 1034 1035 enum lka_resp_status { 1036 LKA_OK, 1037 LKA_TEMPFAIL, 1038 LKA_PERMFAIL 1039 }; 1040 1041 enum filter_type { 1042 FILTER_TYPE_BUILTIN, 1043 FILTER_TYPE_PROC, 1044 FILTER_TYPE_CHAIN, 1045 }; 1046 1047 enum filter_subsystem { 1048 FILTER_SUBSYSTEM_SMTP_IN = 1<<0, 1049 FILTER_SUBSYSTEM_SMTP_OUT = 1<<1, 1050 }; 1051 1052 struct filter_proc { 1053 const char *command; 1054 const char *user; 1055 const char *group; 1056 const char *chroot; 1057 int errfd; 1058 enum filter_subsystem filter_subsystem; 1059 }; 1060 1061 struct filter_config { 1062 char *name; 1063 enum filter_subsystem filter_subsystem; 1064 enum filter_type filter_type; 1065 enum filter_phase phase; 1066 char *reject; 1067 char *disconnect; 1068 char *rewrite; 1069 char *report; 1070 uint8_t junk; 1071 uint8_t bypass; 1072 char *proc; 1073 1074 const char **chain; 1075 size_t chain_size; 1076 struct dict chain_procs; 1077 1078 int8_t not_fcrdns; 1079 int8_t fcrdns; 1080 1081 int8_t not_rdns; 1082 int8_t rdns; 1083 1084 int8_t not_rdns_table; 1085 struct table *rdns_table; 1086 1087 int8_t not_rdns_regex; 1088 struct table *rdns_regex; 1089 1090 int8_t not_src_table; 1091 struct table *src_table; 1092 1093 int8_t not_src_regex; 1094 struct table *src_regex; 1095 1096 int8_t not_helo_table; 1097 struct table *helo_table; 1098 1099 int8_t not_helo_regex; 1100 struct table *helo_regex; 1101 1102 int8_t not_auth; 1103 int8_t auth; 1104 1105 int8_t not_auth_table; 1106 struct table *auth_table; 1107 1108 int8_t not_auth_regex; 1109 struct table *auth_regex; 1110 1111 int8_t not_mail_from_table; 1112 struct table *mail_from_table; 1113 1114 int8_t not_mail_from_regex; 1115 struct table *mail_from_regex; 1116 1117 int8_t not_rcpt_to_table; 1118 struct table *rcpt_to_table; 1119 1120 int8_t not_rcpt_to_regex; 1121 struct table *rcpt_to_regex; 1122 1123 }; 1124 1125 enum filter_status { 1126 FILTER_PROCEED, 1127 FILTER_REWRITE, 1128 FILTER_REJECT, 1129 FILTER_DISCONNECT, 1130 FILTER_JUNK, 1131 }; 1132 1133 enum ca_resp_status { 1134 CA_OK, 1135 CA_FAIL 1136 }; 1137 1138 enum mda_resp_status { 1139 MDA_OK, 1140 MDA_TEMPFAIL, 1141 MDA_PERMFAIL 1142 }; 1143 1144 struct msg_walkinfo { 1145 struct event ev; 1146 uint32_t msgid; 1147 uint32_t peerid; 1148 size_t n_evp; 1149 void *data; 1150 int done; 1151 }; 1152 1153 1154 enum dispatcher_type { 1155 DISPATCHER_LOCAL, 1156 DISPATCHER_REMOTE, 1157 DISPATCHER_BOUNCE, 1158 }; 1159 1160 struct dispatcher_local { 1161 uint8_t is_mbox; /* only for MBOX */ 1162 1163 uint8_t expand_only; 1164 uint8_t forward_only; 1165 1166 char *mda_wrapper; 1167 char *command; 1168 1169 char *table_alias; 1170 char *table_virtual; 1171 char *table_userbase; 1172 1173 char *user; 1174 }; 1175 1176 struct dispatcher_remote { 1177 char *helo; 1178 char *helo_source; 1179 1180 char *source; 1181 1182 struct tls_config *tls_config; 1183 char *ca; 1184 char *pki; 1185 1186 char *mail_from; 1187 1188 char *smarthost; 1189 int smarthost_domain; 1190 1191 char *auth; 1192 int tls_required; 1193 int tls_verify; 1194 char *tls_protocols; 1195 char *tls_ciphers; 1196 1197 int backup; 1198 char *backupmx; 1199 1200 char *filtername; 1201 1202 int srs; 1203 }; 1204 1205 struct dispatcher_bounce { 1206 }; 1207 1208 struct dispatcher { 1209 enum dispatcher_type type; 1210 union dispatcher_agent { 1211 struct dispatcher_local local; 1212 struct dispatcher_remote remote; 1213 struct dispatcher_bounce bounce; 1214 } u; 1215 1216 time_t ttl; 1217 }; 1218 1219 struct rule { 1220 TAILQ_ENTRY(rule) r_entry; 1221 1222 uint8_t reject; 1223 1224 int8_t flag_tag; 1225 int8_t flag_from; 1226 int8_t flag_for; 1227 int8_t flag_from_rdns; 1228 int8_t flag_from_socket; 1229 1230 int8_t flag_tag_regex; 1231 int8_t flag_from_regex; 1232 int8_t flag_for_regex; 1233 1234 int8_t flag_smtp_helo; 1235 int8_t flag_smtp_starttls; 1236 int8_t flag_smtp_auth; 1237 int8_t flag_smtp_mail_from; 1238 int8_t flag_smtp_rcpt_to; 1239 1240 int8_t flag_smtp_helo_regex; 1241 int8_t flag_smtp_starttls_regex; 1242 int8_t flag_smtp_auth_regex; 1243 int8_t flag_smtp_mail_from_regex; 1244 int8_t flag_smtp_rcpt_to_regex; 1245 1246 1247 char *table_tag; 1248 char *table_from; 1249 char *table_for; 1250 1251 char *table_smtp_helo; 1252 char *table_smtp_auth; 1253 char *table_smtp_mail_from; 1254 char *table_smtp_rcpt_to; 1255 1256 char *dispatcher; 1257 }; 1258 1259 1260 /* aliases.c */ 1261 int aliases_get(struct expand *, const char *); 1262 int aliases_virtual_get(struct expand *, const struct mailaddr *); 1263 int alias_parse(struct expandnode *, const char *); 1264 1265 1266 /* auth.c */ 1267 struct auth_backend *auth_backend_lookup(enum auth_type); 1268 1269 1270 /* bounce.c */ 1271 void bounce_add(uint64_t); 1272 void bounce_fd(int); 1273 1274 1275 /* ca.c */ 1276 int ca(void); 1277 int ca_X509_verify(void *, void *, const char *, const char *, const char **); 1278 void ca_imsg(struct mproc *, struct imsg *); 1279 void ca_init(void); 1280 void ca_engine_init(void); 1281 1282 1283 /* compress_backend.c */ 1284 struct compress_backend *compress_backend_lookup(const char *); 1285 size_t compress_chunk(void *, size_t, void *, size_t); 1286 size_t uncompress_chunk(void *, size_t, void *, size_t); 1287 int compress_file(FILE *, FILE *); 1288 int uncompress_file(FILE *, FILE *); 1289 1290 /* config.c */ 1291 #define PURGE_LISTENERS 0x01 1292 #define PURGE_TABLES 0x02 1293 #define PURGE_RULES 0x04 1294 #define PURGE_PKI 0x08 1295 #define PURGE_PKI_KEYS 0x10 1296 #define PURGE_DISPATCHERS 0x20 1297 #define PURGE_EVERYTHING 0xff 1298 struct smtpd *config_default(void); 1299 void purge_config(uint8_t); 1300 void config_process(enum smtp_proc_type); 1301 void config_peer(enum smtp_proc_type); 1302 1303 1304 /* control.c */ 1305 int control(void); 1306 int control_create_socket(void); 1307 1308 1309 /* crypto.c */ 1310 int crypto_setup(const char *, size_t); 1311 int crypto_encrypt_file(FILE *, FILE *); 1312 int crypto_decrypt_file(FILE *, FILE *); 1313 size_t crypto_encrypt_buffer(const char *, size_t, char *, size_t); 1314 size_t crypto_decrypt_buffer(const char *, size_t, char *, size_t); 1315 1316 1317 /* dns.c */ 1318 void dns_imsg(struct mproc *, struct imsg *); 1319 1320 1321 /* enqueue.c */ 1322 int enqueue(int, char **, FILE *); 1323 1324 1325 /* envelope.c */ 1326 void envelope_set_errormsg(struct envelope *, char *, ...) 1327 __attribute__((__format__ (printf, 2, 3))); 1328 void envelope_set_esc_class(struct envelope *, enum enhanced_status_class); 1329 void envelope_set_esc_code(struct envelope *, enum enhanced_status_code); 1330 int envelope_load_buffer(struct envelope *, const char *, size_t); 1331 int envelope_dump_buffer(const struct envelope *, char *, size_t); 1332 1333 1334 /* expand.c */ 1335 int expand_cmp(struct expandnode *, struct expandnode *); 1336 void expand_insert(struct expand *, struct expandnode *); 1337 struct expandnode *expand_lookup(struct expand *, struct expandnode *); 1338 void expand_clear(struct expand *); 1339 void expand_free(struct expand *); 1340 int expand_line(struct expand *, const char *, int); 1341 int expand_to_text(struct expand *, char *, size_t); 1342 RB_PROTOTYPE(expandtree, expandnode, nodes, expand_cmp); 1343 1344 1345 /* forward.c */ 1346 int forwards_get(int, struct expand *); 1347 1348 1349 /* limit.c */ 1350 void limit_mta_set_defaults(struct mta_limits *); 1351 int limit_mta_set(struct mta_limits *, const char*, int64_t); 1352 1353 1354 /* lka.c */ 1355 int lka(void); 1356 1357 1358 /* lka_proc.c */ 1359 int lka_proc_ready(void); 1360 void lka_proc_forked(const char *, uint32_t, int); 1361 void lka_proc_errfd(const char *, int); 1362 struct io *lka_proc_get_io(const char *); 1363 1364 1365 /* lka_report.c */ 1366 void lka_report_init(void); 1367 void lka_report_register_hook(const char *, const char *); 1368 void lka_report_smtp_link_connect(const char *, struct timeval *, uint64_t, const char *, int, 1369 const struct sockaddr_storage *, const struct sockaddr_storage *); 1370 void lka_report_smtp_link_disconnect(const char *, struct timeval *, uint64_t); 1371 void lka_report_smtp_link_greeting(const char *, uint64_t, struct timeval *, 1372 const char *); 1373 void lka_report_smtp_link_identify(const char *, struct timeval *, uint64_t, const char *, const char *); 1374 void lka_report_smtp_link_tls(const char *, struct timeval *, uint64_t, const char *); 1375 void lka_report_smtp_link_auth(const char *, struct timeval *, uint64_t, const char *, const char *); 1376 void lka_report_smtp_tx_reset(const char *, struct timeval *, uint64_t, uint32_t); 1377 void lka_report_smtp_tx_begin(const char *, struct timeval *, uint64_t, uint32_t); 1378 void lka_report_smtp_tx_mail(const char *, struct timeval *, uint64_t, uint32_t, const char *, int); 1379 void lka_report_smtp_tx_rcpt(const char *, struct timeval *, uint64_t, uint32_t, const char *, int); 1380 void lka_report_smtp_tx_envelope(const char *, struct timeval *, uint64_t, uint32_t, uint64_t); 1381 void lka_report_smtp_tx_commit(const char *, struct timeval *, uint64_t, uint32_t, size_t); 1382 void lka_report_smtp_tx_data(const char *, struct timeval *, uint64_t, uint32_t, int); 1383 void lka_report_smtp_tx_rollback(const char *, struct timeval *, uint64_t, uint32_t); 1384 void lka_report_smtp_protocol_client(const char *, struct timeval *, uint64_t, const char *); 1385 void lka_report_smtp_protocol_server(const char *, struct timeval *, uint64_t, const char *); 1386 void lka_report_smtp_filter_response(const char *, struct timeval *, uint64_t, 1387 int, int, const char *); 1388 void lka_report_smtp_timeout(const char *, struct timeval *, uint64_t); 1389 void lka_report_filter_report(uint64_t, const char *, int, const char *, 1390 struct timeval *, const char *); 1391 void lka_report_proc(const char *, const char *); 1392 1393 1394 /* lka_filter.c */ 1395 void lka_filter_init(void); 1396 void lka_filter_register_hook(const char *, const char *); 1397 void lka_filter_ready(void); 1398 int lka_filter_proc_in_session(uint64_t, const char *); 1399 void lka_filter_begin(uint64_t, const char *); 1400 void lka_filter_end(uint64_t); 1401 void lka_filter_protocol(uint64_t, enum filter_phase, const char *); 1402 void lka_filter_data_begin(uint64_t); 1403 void lka_filter_data_end(uint64_t); 1404 int lka_filter_response(uint64_t, const char *, const char *); 1405 1406 1407 /* lka_session.c */ 1408 void lka_session(uint64_t, struct envelope *); 1409 void lka_session_forward_reply(struct forward_req *, int); 1410 1411 1412 /* log.c */ 1413 void vlog(int, const char *, va_list); 1414 void logit(int, const char *, ...) __attribute__((format (printf, 2, 3))); 1415 1416 1417 /* mda.c */ 1418 void mda_postfork(void); 1419 void mda_postprivdrop(void); 1420 void mda_imsg(struct mproc *, struct imsg *); 1421 1422 1423 /* mda_mbox.c */ 1424 void mda_mbox_init(struct deliver *); 1425 void mda_mbox(struct deliver *); 1426 1427 1428 /* mda_unpriv.c */ 1429 void mda_unpriv(struct dispatcher *, struct deliver *, const char *, const char *); 1430 1431 1432 /* mda_variables.c */ 1433 ssize_t mda_expand_format(char *, size_t, const struct deliver *, 1434 const struct userinfo *, const char *); 1435 1436 1437 /* makemap.c */ 1438 int makemap(int, int, char **); 1439 1440 1441 /* mailaddr.c */ 1442 int mailaddr_line(struct maddrmap *, const char *); 1443 void maddrmap_init(struct maddrmap *); 1444 void maddrmap_insert(struct maddrmap *, struct maddrnode *); 1445 void maddrmap_free(struct maddrmap *); 1446 1447 1448 /* mproc.c */ 1449 int mproc_fork(struct mproc *, const char*, char **); 1450 void mproc_init(struct mproc *, int); 1451 void mproc_clear(struct mproc *); 1452 void mproc_enable(struct mproc *); 1453 void mproc_disable(struct mproc *); 1454 void mproc_event_add(struct mproc *); 1455 void m_compose(struct mproc *, uint32_t, uint32_t, pid_t, int, void *, size_t); 1456 void m_composev(struct mproc *, uint32_t, uint32_t, pid_t, int, 1457 const struct iovec *, int); 1458 void m_forward(struct mproc *, struct imsg *); 1459 void m_create(struct mproc *, uint32_t, uint32_t, pid_t, int); 1460 void m_add(struct mproc *, const void *, size_t); 1461 void m_add_int(struct mproc *, int); 1462 void m_add_u32(struct mproc *, uint32_t); 1463 void m_add_size(struct mproc *, size_t); 1464 void m_add_time(struct mproc *, time_t); 1465 void m_add_timeval(struct mproc *, struct timeval *tv); 1466 void m_add_string(struct mproc *, const char *); 1467 void m_add_data(struct mproc *, const void *, size_t); 1468 void m_add_evpid(struct mproc *, uint64_t); 1469 void m_add_msgid(struct mproc *, uint32_t); 1470 void m_add_id(struct mproc *, uint64_t); 1471 void m_add_sockaddr(struct mproc *, const struct sockaddr *); 1472 void m_add_mailaddr(struct mproc *, const struct mailaddr *); 1473 void m_add_envelope(struct mproc *, const struct envelope *); 1474 void m_add_params(struct mproc *, struct dict *); 1475 void m_close(struct mproc *); 1476 void m_flush(struct mproc *); 1477 1478 void m_msg(struct msg *, struct imsg *); 1479 int m_is_eom(struct msg *); 1480 void m_end(struct msg *); 1481 void m_get_int(struct msg *, int *); 1482 void m_get_size(struct msg *, size_t *); 1483 void m_get_u32(struct msg *, uint32_t *); 1484 void m_get_time(struct msg *, time_t *); 1485 void m_get_timeval(struct msg *, struct timeval *); 1486 void m_get_string(struct msg *, const char **); 1487 void m_get_data(struct msg *, const void **, size_t *); 1488 void m_get_evpid(struct msg *, uint64_t *); 1489 void m_get_msgid(struct msg *, uint32_t *); 1490 void m_get_id(struct msg *, uint64_t *); 1491 void m_get_sockaddr(struct msg *, struct sockaddr *); 1492 void m_get_mailaddr(struct msg *, struct mailaddr *); 1493 void m_get_envelope(struct msg *, struct envelope *); 1494 void m_get_params(struct msg *, struct dict *); 1495 void m_clear_params(struct dict *); 1496 1497 1498 /* mta.c */ 1499 void mta_postfork(void); 1500 void mta_postprivdrop(void); 1501 void mta_imsg(struct mproc *, struct imsg *); 1502 void mta_route_ok(struct mta_relay *, struct mta_route *); 1503 void mta_route_error(struct mta_relay *, struct mta_route *); 1504 void mta_route_down(struct mta_relay *, struct mta_route *); 1505 void mta_route_collect(struct mta_relay *, struct mta_route *); 1506 void mta_source_error(struct mta_relay *, struct mta_route *, const char *); 1507 void mta_delivery_log(struct mta_envelope *, const char *, const char *, int, const char *); 1508 void mta_delivery_notify(struct mta_envelope *); 1509 struct mta_task *mta_route_next_task(struct mta_relay *, struct mta_route *); 1510 const char *mta_host_to_text(struct mta_host *); 1511 const char *mta_relay_to_text(struct mta_relay *); 1512 1513 1514 /* mta_session.c */ 1515 void mta_session(struct mta_relay *, struct mta_route *, const char *); 1516 void mta_session_imsg(struct mproc *, struct imsg *); 1517 1518 1519 /* parse.y */ 1520 int parse_config(struct smtpd *, const char *, int); 1521 int cmdline_symset(char *); 1522 1523 1524 /* queue.c */ 1525 int queue(void); 1526 1527 1528 /* queue_backend.c */ 1529 uint32_t queue_generate_msgid(void); 1530 uint64_t queue_generate_evpid(uint32_t); 1531 int queue_init(const char *, int); 1532 int queue_close(void); 1533 int queue_message_create(uint32_t *); 1534 int queue_message_delete(uint32_t); 1535 int queue_message_commit(uint32_t); 1536 int queue_message_fd_r(uint32_t); 1537 int queue_message_fd_rw(uint32_t); 1538 int queue_envelope_create(struct envelope *); 1539 int queue_envelope_delete(uint64_t); 1540 int queue_envelope_load(uint64_t, struct envelope *); 1541 int queue_envelope_update(struct envelope *); 1542 int queue_envelope_walk(struct envelope *); 1543 int queue_message_walk(struct envelope *, uint32_t, int *, void **); 1544 1545 1546 /* report_smtp.c */ 1547 void report_smtp_link_connect(const char *, uint64_t, const char *, int, 1548 const struct sockaddr_storage *, const struct sockaddr_storage *); 1549 void report_smtp_link_disconnect(const char *, uint64_t); 1550 void report_smtp_link_greeting(const char *, uint64_t, const char *); 1551 void report_smtp_link_identify(const char *, uint64_t, const char *, const char *); 1552 void report_smtp_link_tls(const char *, uint64_t, const char *); 1553 void report_smtp_link_auth(const char *, uint64_t, const char *, const char *); 1554 void report_smtp_tx_reset(const char *, uint64_t, uint32_t); 1555 void report_smtp_tx_begin(const char *, uint64_t, uint32_t); 1556 void report_smtp_tx_mail(const char *, uint64_t, uint32_t, const char *, int); 1557 void report_smtp_tx_rcpt(const char *, uint64_t, uint32_t, const char *, int); 1558 void report_smtp_tx_envelope(const char *, uint64_t, uint32_t, uint64_t); 1559 void report_smtp_tx_data(const char *, uint64_t, uint32_t, int); 1560 void report_smtp_tx_commit(const char *, uint64_t, uint32_t, size_t); 1561 void report_smtp_tx_rollback(const char *, uint64_t, uint32_t); 1562 void report_smtp_protocol_client(const char *, uint64_t, const char *); 1563 void report_smtp_protocol_server(const char *, uint64_t, const char *); 1564 void report_smtp_filter_response(const char *, uint64_t, int, int, const char *); 1565 void report_smtp_timeout(const char *, uint64_t); 1566 1567 1568 /* ruleset.c */ 1569 struct rule *ruleset_match(const struct envelope *); 1570 1571 1572 /* scheduler.c */ 1573 int scheduler(void); 1574 1575 1576 /* scheduler_bakend.c */ 1577 struct scheduler_backend *scheduler_backend_lookup(const char *); 1578 void scheduler_info(struct scheduler_info *, struct envelope *); 1579 1580 1581 /* dispatcher.c */ 1582 int dispatcher(void); 1583 void dispatcher_imsg(struct mproc *, struct imsg *); 1584 1585 1586 /* resolver.c */ 1587 void resolver_getaddrinfo(const char *, const char *, const struct addrinfo *, 1588 void(*)(void *, int, struct addrinfo*), void *); 1589 void resolver_getnameinfo(const struct sockaddr *, int, 1590 void(*)(void *, int, const char *, const char *), void *); 1591 void resolver_res_query(const char *, int, int, 1592 void (*cb)(void *, int, int, int, const void *, int), void *); 1593 void resolver_dispatch_request(struct mproc *, struct imsg *); 1594 void resolver_dispatch_result(struct mproc *, struct imsg *); 1595 1596 1597 /* smtp.c */ 1598 void smtp_postfork(void); 1599 void smtp_postprivdrop(void); 1600 void smtp_imsg(struct mproc *, struct imsg *); 1601 void smtp_configure(void); 1602 void smtp_collect(void); 1603 1604 1605 /* smtp_session.c */ 1606 int smtp_session(struct listener *, int, const struct sockaddr_storage *, 1607 const char *, struct io *); 1608 void smtp_session_imsg(struct mproc *, struct imsg *); 1609 1610 1611 /* smtpf_session.c */ 1612 int smtpf_session(struct listener *, int, const struct sockaddr_storage *, 1613 const char *); 1614 void smtpf_session_imsg(struct mproc *, struct imsg *); 1615 1616 1617 /* smtpd.c */ 1618 void imsg_dispatch(struct mproc *, struct imsg *); 1619 const char *proc_name(enum smtp_proc_type); 1620 const char *proc_title(enum smtp_proc_type); 1621 const char *imsg_to_str(int); 1622 void log_imsg(int, int, struct imsg *); 1623 int fork_proc_backend(const char *, const char *, const char *, int); 1624 1625 1626 /* srs.c */ 1627 const char *srs_encode(const char *, const char *); 1628 const char *srs_decode(const char *); 1629 1630 1631 /* stat_backend.c */ 1632 struct stat_backend *stat_backend_lookup(const char *); 1633 void stat_increment(const char *, size_t); 1634 void stat_decrement(const char *, size_t); 1635 void stat_set(const char *, const struct stat_value *); 1636 struct stat_value *stat_counter(size_t); 1637 struct stat_value *stat_timestamp(time_t); 1638 struct stat_value *stat_timeval(struct timeval *); 1639 struct stat_value *stat_timespec(struct timespec *); 1640 1641 1642 /* table.c */ 1643 const char *table_service_name(enum table_service); 1644 int table_service_from_name(const char *); 1645 struct table *table_find(struct smtpd *, const char *); 1646 struct table *table_create(struct smtpd *, const char *, const char *, 1647 const char *); 1648 int table_config(struct table *); 1649 int table_open(struct table *); 1650 int table_update(struct table *); 1651 void table_close(struct table *); 1652 void table_dump(struct table *); 1653 int table_check_use(struct table *, uint32_t, uint32_t); 1654 int table_check_type(struct table *, uint32_t); 1655 int table_check_service(struct table *, uint32_t); 1656 int table_match(struct table *, enum table_service, const char *); 1657 int table_lookup(struct table *, enum table_service, const char *, 1658 union lookup *); 1659 int table_fetch(struct table *, enum table_service, union lookup *); 1660 void table_destroy(struct smtpd *, struct table *); 1661 void table_add(struct table *, const char *, const char *); 1662 int table_domain_match(const char *, const char *); 1663 int table_netaddr_match(const char *, const char *); 1664 int table_mailaddr_match(const char *, const char *); 1665 int table_regex_match(const char *, const char *); 1666 void table_open_all(struct smtpd *); 1667 void table_dump_all(struct smtpd *); 1668 void table_close_all(struct smtpd *); 1669 1670 1671 /* to.c */ 1672 int email_to_mailaddr(struct mailaddr *, char *); 1673 int text_to_netaddr(struct netaddr *, const char *); 1674 int text_to_mailaddr(struct mailaddr *, const char *); 1675 int text_to_relayhost(struct relayhost *, const char *); 1676 int text_to_userinfo(struct userinfo *, const char *); 1677 int text_to_credentials(struct credentials *, const char *); 1678 int text_to_expandnode(struct expandnode *, const char *); 1679 uint64_t text_to_evpid(const char *); 1680 uint32_t text_to_msgid(const char *); 1681 const char *sa_to_text(const struct sockaddr *); 1682 const char *ss_to_text(const struct sockaddr_storage *); 1683 const char *time_to_text(time_t); 1684 const char *duration_to_text(time_t); 1685 const char *rule_to_text(struct rule *); 1686 const char *sockaddr_to_text(const struct sockaddr *); 1687 const char *mailaddr_to_text(const struct mailaddr *); 1688 const char *expandnode_to_text(struct expandnode *); 1689 const char *tls_to_text(struct tls *); 1690 1691 1692 /* util.c */ 1693 typedef struct arglist arglist; 1694 struct arglist { 1695 char **list; 1696 uint num; 1697 uint nalloc; 1698 }; 1699 void addargs(arglist *, char *, ...) 1700 __attribute__((format(printf, 2, 3))); 1701 int bsnprintf(char *, size_t, const char *, ...) 1702 __attribute__((format (printf, 3, 4))); 1703 int safe_fclose(FILE *); 1704 int hostname_match(const char *, const char *); 1705 int mailaddr_match(const struct mailaddr *, const struct mailaddr *); 1706 int valid_localpart(const char *); 1707 int valid_domainpart(const char *); 1708 int valid_domainname(const char *); 1709 int valid_smtp_response(const char *); 1710 int valid_xtext(const char *); 1711 int secure_file(int, char *, char *, uid_t, int); 1712 int lowercase(char *, const char *, size_t); 1713 void xlowercase(char *, const char *, size_t); 1714 int uppercase(char *, const char *, size_t); 1715 uint64_t generate_uid(void); 1716 int availdesc(void); 1717 int ckdir(const char *, mode_t, uid_t, gid_t, int); 1718 int rmtree(char *, int); 1719 int mvpurge(char *, char *); 1720 int mktmpfile(void); 1721 const char *parse_smtp_response(char *, size_t, char **, int *); 1722 int xasprintf(char **, const char *, ...) 1723 __attribute__((__format__ (printf, 2, 3))); 1724 void *xmalloc(size_t); 1725 void *xcalloc(size_t, size_t); 1726 char *xstrdup(const char *); 1727 void *xmemdup(const void *, size_t); 1728 char *strip(char *); 1729 int io_xprint(struct io *, const char *); 1730 int io_xprintf(struct io *, const char *, ...) 1731 __attribute__((__format__ (printf, 2, 3))); 1732 void log_envelope(const struct envelope *, const char *, const char *, 1733 const char *); 1734 int session_socket_error(int); 1735 int getmailname(char *, size_t); 1736 int base64_encode(unsigned char const *, size_t, char *, size_t); 1737 int base64_decode(char const *, unsigned char *, size_t); 1738 int base64_encode_rfc3548(unsigned char const *, size_t, 1739 char *, size_t); 1740 1741 void log_trace_verbose(int); 1742 void log_trace0(const char *, ...) 1743 __attribute__((format (printf, 1, 2))); 1744 #define log_trace(m, ...) do { if (tracing & (m)) log_trace0(__VA_ARGS__); } while (0) 1745 1746 int parse_table_line(FILE *, char **, size_t *, int *, 1747 char **, char **, int *); 1748 1749 /* waitq.c */ 1750 int waitq_wait(void *, void (*)(void *, void *, void *), void *); 1751 void waitq_run(void *, void *); 1752 1753 1754 /* runq.c */ 1755 struct runq; 1756 1757 int runq_init(struct runq **, void (*)(struct runq *, void *)); 1758 int runq_schedule(struct runq *, time_t, void *); 1759 int runq_schedule_at(struct runq *, time_t, void *); 1760 int runq_cancel(struct runq *, void *); 1761 int runq_pending(struct runq *, void *, time_t *); 1762