smtpd.h revision 1.250
1/* $OpenBSD: smtpd.h,v 1.250 2011/11/14 19:23:41 chl Exp $ */ 2 3/* 4 * Copyright (c) 2008 Gilles Chehade <gilles@openbsd.org> 5 * Copyright (c) 2008 Pierre-Yves Ritschard <pyr@openbsd.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20#ifndef nitems 21#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0])) 22#endif 23 24#include "filter.h" 25 26#define IMSG_SIZE_CHECK(p) do { \ 27 if (IMSG_DATA_SIZE(&imsg) != sizeof(*p)) \ 28 fatalx("bad length imsg received"); \ 29 } while (0) 30#define IMSG_DATA_SIZE(imsg) ((imsg)->hdr.len - IMSG_HEADER_SIZE) 31 32 33#define CONF_FILE "/etc/mail/smtpd.conf" 34#define MAX_LISTEN 16 35#define PROC_COUNT 9 36#define MAX_NAME_SIZE 64 37 38#define MAX_HOPS_COUNT 100 39 40#define MAX_TAG_SIZE 32 41/* SYNC WITH filter.h */ 42//#define MAX_LINE_SIZE 1024 43//#define MAX_LOCALPART_SIZE 128 44//#define MAX_DOMAINPART_SIZE MAXHOSTNAMELEN 45 46/* return and forward path size */ 47#define MAX_FILTER_NAME 32 48#define MAX_PATH_SIZE 256 49#define MAX_RULEBUFFER_LEN 256 50 51#define SMTPD_QUEUE_INTERVAL (15 * 60) 52#define SMTPD_QUEUE_MAXINTERVAL (4 * 60 * 60) 53#define SMTPD_QUEUE_EXPIRY (4 * 24 * 60 * 60) 54#define SMTPD_USER "_smtpd" 55#define SMTPD_FILTER_USER "_smtpmfa" 56#define SMTPD_SOCKET "/var/run/smtpd.sock" 57#define SMTPD_BANNER "220 %s ESMTP OpenSMTPD" 58#define SMTPD_SESSION_TIMEOUT 300 59#define SMTPD_BACKLOG 5 60 61#define PATH_MAILLOCAL "/usr/libexec/mail.local" 62#define PATH_SMTPCTL "/usr/sbin/smtpctl" 63 64#define DIRHASH_BUCKETS 4096 65 66#define PATH_SPOOL "/var/spool/smtpd" 67 68#define PATH_ENQUEUE "/enqueue" 69#define PATH_INCOMING "/incoming" 70#define PATH_QUEUE "/queue" 71#define PATH_PURGE "/purge" 72#define PATH_CORRUPT "/corrupt" 73 74#define PATH_MESSAGE "/message" 75#define PATH_ENVELOPES "/envelopes" 76 77#define PATH_OFFLINE "/offline" 78#define PATH_BOUNCE "/bounce" 79 80/* number of MX records to lookup */ 81#define MAX_MX_COUNT 10 82 83/* max response delay under flood conditions */ 84#define MAX_RESPONSE_DELAY 60 85 86/* how many responses per state are undelayed */ 87#define FAST_RESPONSES 2 88 89/* max len of any smtp line */ 90#define SMTP_LINE_MAX 1024 91 92#define F_STARTTLS 0x01 93#define F_SMTPS 0x02 94#define F_AUTH 0x04 95#define F_SSL (F_SMTPS|F_STARTTLS) 96 97#define F_SCERT 0x01 98#define F_CCERT 0x02 99 100#define ADVERTISE_TLS(s) \ 101 ((s)->s_l->flags & F_STARTTLS && !((s)->s_flags & F_SECURE)) 102 103#define ADVERTISE_AUTH(s) \ 104 ((s)->s_l->flags & F_AUTH && (s)->s_flags & F_SECURE && \ 105 !((s)->s_flags & F_AUTHENTICATED)) 106 107 108 109typedef u_int32_t objid_t; 110 111struct netaddr { 112 struct sockaddr_storage ss; 113 int bits; 114}; 115 116struct relayhost { 117 u_int8_t flags; 118 char hostname[MAXHOSTNAMELEN]; 119 u_int16_t port; 120 char cert[PATH_MAX]; 121 char authmap[MAX_PATH_SIZE]; 122}; 123 124enum imsg_type { 125 IMSG_NONE, 126 IMSG_CTL_OK, /* answer to smtpctl requests */ 127 IMSG_CTL_FAIL, 128 IMSG_CTL_SHUTDOWN, 129 IMSG_CTL_VERBOSE, 130 IMSG_CONF_START, 131 IMSG_CONF_SSL, 132 IMSG_CONF_LISTENER, 133 IMSG_CONF_MAP, 134 IMSG_CONF_MAP_CONTENT, 135 IMSG_CONF_RULE, 136 IMSG_CONF_RULE_SOURCE, 137 IMSG_CONF_FILTER, 138 IMSG_CONF_END, 139 IMSG_CONF_RELOAD, 140 IMSG_LKA_MAIL, 141 IMSG_LKA_RCPT, 142 IMSG_LKA_SECRET, 143 IMSG_LKA_RULEMATCH, 144 IMSG_MDA_SESS_NEW, 145 IMSG_MDA_DONE, 146 147 IMSG_MFA_HELO, 148 IMSG_MFA_MAIL, 149 IMSG_MFA_RCPT, 150 IMSG_MFA_DATALINE, 151 152 IMSG_QUEUE_CREATE_MESSAGE, 153 IMSG_QUEUE_SUBMIT_ENVELOPE, 154 IMSG_QUEUE_COMMIT_ENVELOPES, 155 IMSG_QUEUE_REMOVE_MESSAGE, 156 IMSG_QUEUE_COMMIT_MESSAGE, 157 IMSG_QUEUE_TEMPFAIL, 158 IMSG_QUEUE_PAUSE_MDA, 159 IMSG_QUEUE_PAUSE_MTA, 160 IMSG_QUEUE_RESUME_MDA, 161 IMSG_QUEUE_RESUME_MTA, 162 163 IMSG_QUEUE_MESSAGE_UPDATE, 164 IMSG_QUEUE_MESSAGE_FD, 165 IMSG_QUEUE_MESSAGE_FILE, 166 IMSG_QUEUE_SCHEDULE, 167 IMSG_QUEUE_REMOVE, 168 169 IMSG_RUNNER_REMOVE, 170 IMSG_RUNNER_SCHEDULE, 171 172 IMSG_BATCH_CREATE, 173 IMSG_BATCH_APPEND, 174 IMSG_BATCH_CLOSE, 175 IMSG_BATCH_DONE, 176 177 IMSG_PARENT_FORWARD_OPEN, 178 IMSG_PARENT_FORK_MDA, 179 180 IMSG_PARENT_AUTHENTICATE, 181 IMSG_PARENT_SEND_CONFIG, 182 183 IMSG_STATS, 184 IMSG_SMTP_ENQUEUE, 185 IMSG_SMTP_PAUSE, 186 IMSG_SMTP_RESUME, 187 188 IMSG_DNS_HOST, 189 IMSG_DNS_HOST_END, 190 IMSG_DNS_MX, 191 IMSG_DNS_PTR 192}; 193 194enum blockmodes { 195 BM_NORMAL, 196 BM_NONBLOCK 197}; 198 199struct imsgev { 200 struct imsgbuf ibuf; 201 void (*handler)(int, short, void *); 202 struct event ev; 203 void *data; 204 int proc; 205 short events; 206}; 207 208struct ctl_conn { 209 TAILQ_ENTRY(ctl_conn) entry; 210 u_int8_t flags; 211#define CTL_CONN_NOTIFY 0x01 212 struct imsgev iev; 213}; 214TAILQ_HEAD(ctl_connlist, ctl_conn); 215 216struct ctl_id { 217 objid_t id; 218 char name[MAX_NAME_SIZE]; 219}; 220 221enum smtp_proc_type { 222 PROC_PARENT = 0, 223 PROC_SMTP, 224 PROC_MFA, 225 PROC_LKA, 226 PROC_QUEUE, 227 PROC_MDA, 228 PROC_MTA, 229 PROC_CONTROL, 230 PROC_RUNNER, 231} smtpd_process; 232 233struct peer { 234 enum smtp_proc_type id; 235 void (*cb)(int, short, void *); 236}; 237 238enum map_type { 239 T_SINGLE, 240 T_LIST, 241 T_HASH 242}; 243 244enum map_src { 245 S_NONE, 246 S_DYN, 247 S_DNS, 248 S_PLAIN, 249 S_DB, 250 S_EXT 251}; 252 253enum map_kind { 254 K_NONE, 255 K_ALIAS, 256 K_VIRTUAL, 257 K_SECRET 258}; 259 260enum mapel_type { 261 ME_STRING, 262 ME_NET, 263 ME_NETMASK 264}; 265 266struct mapel { 267 TAILQ_ENTRY(mapel) me_entry; 268 union mapel_data { 269 char med_string[MAX_LINE_SIZE]; 270 struct netaddr med_addr; 271 } me_key; 272 union mapel_data me_val; 273}; 274 275struct map { 276 TAILQ_ENTRY(map) m_entry; 277#define F_USED 0x01 278#define F_DYNAMIC 0x02 279 u_int8_t m_flags; 280 char m_name[MAX_LINE_SIZE]; 281 objid_t m_id; 282 enum map_type m_type; 283 enum mapel_type m_eltype; 284 enum map_src m_src; 285 char m_config[MAXPATHLEN]; 286 TAILQ_HEAD(mapel_list, mapel) m_contents; 287}; 288 289 290struct map_backend { 291 void *(*open)(char *); 292 void (*close)(void *); 293 void *(*lookup)(void *, char *, enum map_kind); 294}; 295 296 297enum cond_type { 298 C_ALL, 299 C_NET, 300 C_DOM, 301 C_VDOM 302}; 303 304struct cond { 305 TAILQ_ENTRY(cond) c_entry; 306 objid_t c_map; 307 enum cond_type c_type; 308}; 309 310enum action_type { 311 A_INVALID, 312 A_RELAY, 313 A_RELAYVIA, 314 A_MAILDIR, 315 A_MBOX, 316 A_FILENAME, 317 A_EXT 318}; 319 320#define IS_MAILBOX(x) ((x).r_action == A_MAILDIR || (x).r_action == A_MBOX || (x).r_action == A_FILENAME) 321#define IS_RELAY(x) ((x).r_action == A_RELAY || (x).r_action == A_RELAYVIA) 322#define IS_EXT(x) ((x).r_action == A_EXT) 323 324struct rule { 325 TAILQ_ENTRY(rule) r_entry; 326 char r_tag[MAX_TAG_SIZE]; 327 int r_accept; 328 struct map *r_sources; 329 struct cond r_condition; 330 enum action_type r_action; 331 union rule_dest { 332 char buffer[MAX_RULEBUFFER_LEN]; 333 struct relayhost relayhost; 334 } r_value; 335 336 char *r_user; 337 struct mailaddr *r_as; 338 objid_t r_amap; 339 time_t r_qexpire; 340}; 341 342struct mailaddr { 343 char user[MAX_LOCALPART_SIZE]; 344 char domain[MAX_DOMAINPART_SIZE]; 345}; 346 347enum delivery_type { 348 D_INVALID = 0, 349 D_MDA, 350 D_MTA, 351 D_BOUNCE 352}; 353 354enum delivery_status { 355 DS_PERMFAILURE = 0x2, 356 DS_TEMPFAILURE = 0x4, 357 DS_REJECTED = 0x8, 358 DS_ACCEPTED = 0x10 359}; 360 361enum delivery_flags { 362 DF_AUTHENTICATED = 0x1, 363 DF_ENQUEUED = 0x2, 364 DF_BOUNCE = 0x4, 365 DF_INTERNAL = 0x8 /* internal expansion forward */ 366}; 367 368union delivery_data { 369 char user[MAXLOGNAME]; 370 char buffer[MAX_RULEBUFFER_LEN]; 371 struct mailaddr mailaddr; 372}; 373 374struct delivery_mda { 375 enum action_type method; 376 union delivery_data to; 377 char as_user[MAXLOGNAME]; 378}; 379 380struct delivery_mta { 381 struct relayhost relay; 382}; 383 384enum expand_type { 385 EXPAND_INVALID, 386 EXPAND_USERNAME, 387 EXPAND_FILENAME, 388 EXPAND_FILTER, 389 EXPAND_INCLUDE, 390 EXPAND_ADDRESS 391}; 392 393enum expand_flags { 394 F_EXPAND_NONE, 395 F_EXPAND_DONE 396}; 397 398struct expandnode { 399 RB_ENTRY(expandnode) entry; 400 size_t refcnt; 401 enum expand_flags flags; 402 enum expand_type type; 403 char as_user[MAXLOGNAME]; 404 union delivery_data u; 405}; 406 407RB_HEAD(expandtree, expandnode); 408 409#define SMTPD_ENVELOPE_VERSION 1 410struct envelope { 411 TAILQ_ENTRY(envelope) entry; 412 413 char tag[MAX_TAG_SIZE]; 414 struct rule rule; 415 416 u_int64_t session_id; 417 u_int64_t batch_id; 418 419// struct delivery delivery; 420 421 u_int32_t version; 422 u_int64_t id; 423 enum delivery_type type; 424 425 char helo[MAXHOSTNAMELEN]; 426 char hostname[MAXHOSTNAMELEN]; 427 char errorline[MAX_LINE_SIZE + 1]; 428 struct sockaddr_storage ss; 429 430 struct mailaddr sender; 431 struct mailaddr rcpt; 432 struct mailaddr dest; 433 434 union delivery_method { 435 struct delivery_mda mda; 436 struct delivery_mta mta; 437 } agent; 438 439 time_t creation; 440 time_t lasttry; 441 time_t expire; 442 u_int8_t retry; 443 enum delivery_flags flags; 444 enum delivery_status status; 445 446}; 447TAILQ_HEAD(deliverylist, envelope); 448 449 450enum child_type { 451 CHILD_INVALID, 452 CHILD_DAEMON, 453 CHILD_MDA, 454 CHILD_ENQUEUE_OFFLINE, 455}; 456 457struct child { 458 SPLAY_ENTRY(child) entry; 459 pid_t pid; 460 enum child_type type; 461 enum smtp_proc_type title; 462 int mda_out; 463 u_int32_t mda_id; 464}; 465 466enum session_state { 467 S_INVALID = 0, 468 S_INIT, 469 S_GREETED, 470 S_TLS, 471 S_AUTH_INIT, 472 S_AUTH_USERNAME, 473 S_AUTH_PASSWORD, 474 S_AUTH_FINALIZE, 475 S_HELO, 476 S_MAIL_MFA, 477 S_MAIL_QUEUE, 478 S_MAIL, 479 S_RCPT_MFA, 480 S_RCPT, 481 S_DATA, 482 S_DATA_QUEUE, 483 S_DATACONTENT, 484 S_DONE, 485 S_QUIT 486}; 487#define STATE_COUNT 18 488 489struct ssl { 490 SPLAY_ENTRY(ssl) ssl_nodes; 491 char ssl_name[PATH_MAX]; 492 char *ssl_cert; 493 off_t ssl_cert_len; 494 char *ssl_key; 495 off_t ssl_key_len; 496 char *ssl_dhparams; 497 off_t ssl_dhparams_len; 498 u_int8_t flags; 499}; 500 501struct listener { 502 u_int8_t flags; 503 int fd; 504 struct sockaddr_storage ss; 505 in_port_t port; 506 struct timeval timeout; 507 struct event ev; 508 char ssl_cert_name[PATH_MAX]; 509 struct ssl *ssl; 510 void *ssl_ctx; 511 char tag[MAX_TAG_SIZE]; 512 TAILQ_ENTRY(listener) entry; 513}; 514 515struct auth { 516 u_int64_t id; 517 char user[MAXLOGNAME]; 518 char pass[MAX_LINE_SIZE + 1]; 519 int success; 520}; 521 522enum session_flags { 523 F_EHLO = 0x1, 524 F_QUIT = 0x2, 525 F_8BITMIME = 0x4, 526 F_SECURE = 0x8, 527 F_AUTHENTICATED = 0x10, 528 F_PEERHASTLS = 0x20, 529 F_PEERHASAUTH = 0x40, 530 F_WRITEONLY = 0x80 531}; 532 533struct session { 534 SPLAY_ENTRY(session) s_nodes; 535 u_int64_t s_id; 536 537 enum session_flags s_flags; 538 enum session_state s_state; 539 int s_fd; 540 struct sockaddr_storage s_ss; 541 char s_hostname[MAXHOSTNAMELEN]; 542 struct event s_ev; 543 struct bufferevent *s_bev; 544 struct listener *s_l; 545 void *s_ssl; 546 u_char *s_buf; 547 int s_buflen; 548 struct timeval s_tv; 549 struct envelope s_msg; 550 short s_nresp[STATE_COUNT]; 551 size_t rcptcount; 552 long s_datalen; 553 554 struct auth s_auth; 555 556 FILE *datafp; 557 int mboxfd; 558 int messagefd; 559}; 560 561 562/* ram-queue structures */ 563struct ramqueue_host { 564 RB_ENTRY(ramqueue_host) hosttree_entry; 565 TAILQ_HEAD(,ramqueue_batch) batch_queue; 566 u_int64_t h_id; 567 char hostname[MAXHOSTNAMELEN]; 568}; 569struct ramqueue_batch { 570 TAILQ_ENTRY(ramqueue_batch) batch_entry; 571 TAILQ_HEAD(,ramqueue_envelope) envelope_queue; 572 enum delivery_type type; 573 u_int64_t h_id; 574 u_int64_t b_id; 575 u_int32_t msgid; 576 struct relayhost relay; 577}; 578struct ramqueue_envelope { 579 TAILQ_ENTRY(ramqueue_envelope) queue_entry; 580 TAILQ_ENTRY(ramqueue_envelope) batchqueue_entry; 581 RB_ENTRY(ramqueue_envelope) evptree_entry; 582 struct ramqueue_batch *rq_batch; 583 struct ramqueue_message *rq_msg; 584 struct ramqueue_host *rq_host; 585 u_int64_t evpid; 586 time_t sched; 587}; 588struct ramqueue_message { 589 RB_ENTRY(ramqueue_message) msgtree_entry; 590 RB_HEAD(evptree, ramqueue_envelope) evptree; 591 u_int32_t msgid; 592}; 593struct ramqueue { 594 struct ramqueue_envelope *current_evp; 595 RB_HEAD(hosttree, ramqueue_host) hosttree; 596 RB_HEAD(msgtree, ramqueue_message) msgtree; 597 TAILQ_HEAD(,ramqueue_envelope) queue; 598}; 599 600 601struct smtpd { 602 char sc_conffile[MAXPATHLEN]; 603 size_t sc_maxsize; 604 605#define SMTPD_OPT_VERBOSE 0x00000001 606#define SMTPD_OPT_NOACTION 0x00000002 607 u_int32_t sc_opts; 608#define SMTPD_CONFIGURING 0x00000001 609#define SMTPD_EXITING 0x00000002 610#define SMTPD_MDA_PAUSED 0x00000004 611#define SMTPD_MTA_PAUSED 0x00000008 612#define SMTPD_SMTP_PAUSED 0x00000010 613 u_int32_t sc_flags; 614 struct timeval sc_qintval; 615 int sc_qexpire; 616 u_int32_t sc_maxconn; 617 struct event sc_ev; 618 int *sc_pipes[PROC_COUNT] 619 [PROC_COUNT]; 620 struct imsgev *sc_ievs[PROC_COUNT]; 621 int sc_instances[PROC_COUNT]; 622 int sc_instance; 623 char *sc_title[PROC_COUNT]; 624 struct passwd *sc_pw; 625 char sc_hostname[MAXHOSTNAMELEN]; 626 struct ramqueue sc_rqueue; 627 struct queue_backend *sc_queue; 628 629 TAILQ_HEAD(filterlist, filter) *sc_filters; 630 631 TAILQ_HEAD(listenerlist, listener) *sc_listeners; 632 TAILQ_HEAD(maplist, map) *sc_maps, *sc_maps_reload; 633 TAILQ_HEAD(rulelist, rule) *sc_rules, *sc_rules_reload; 634 SPLAY_HEAD(sessiontree, session) sc_sessions; 635 SPLAY_HEAD(ssltree, ssl) *sc_ssl; 636 SPLAY_HEAD(childtree, child) children; 637 SPLAY_HEAD(lkatree, lka_session) lka_sessions; 638 SPLAY_HEAD(mfatree, mfa_session) mfa_sessions; 639 SPLAY_HEAD(mtatree, mta_session) mta_sessions; 640 LIST_HEAD(mdalist, mda_session) mda_sessions; 641 642 struct stats *stats; 643 u_int64_t filtermask; 644}; 645 646#define TRACE_VERBOSE 0x01 647#define TRACE_IMSG 0x02 648 649enum { 650 STATS_SMTP_SESSION = 0, 651 STATS_SMTP_SESSION_INET4, 652 STATS_SMTP_SESSION_INET6, 653 STATS_SMTP_SMTPS, 654 STATS_SMTP_STARTTLS, 655 656 STATS_MTA_SESSION, 657 658 STATS_MDA_SESSION, 659 660 STATS_CONTROL_SESSION, 661 662 STATS_LKA_SESSION, 663 STATS_LKA_SESSION_MX, 664 STATS_LKA_SESSION_HOST, 665 STATS_LKA_SESSION_CNAME, 666 STATS_LKA_FAILURE, 667 668 STATS_RUNNER, 669 STATS_RUNNER_BOUNCES, 670 671 STATS_QUEUE_LOCAL, 672 STATS_QUEUE_REMOTE, 673 674 STATS_RAMQUEUE_ENVELOPE, 675 STATS_RAMQUEUE_MESSAGE, 676 STATS_RAMQUEUE_BATCH, 677 STATS_RAMQUEUE_HOST, 678 679 STATS_MAX, 680}; 681 682#define STAT_COUNT 0 683#define STAT_ACTIVE 1 684#define STAT_MAXACTIVE 2 685 686struct stat_counter { 687 size_t count; 688 size_t active; 689 size_t maxactive; 690}; 691 692struct s_parent { 693 time_t start; 694}; 695 696struct s_session { 697 size_t read_error; 698 size_t read_timeout; 699 size_t read_eof; 700 size_t write_error; 701 size_t write_timeout; 702 size_t write_eof; 703 size_t toofast; 704 size_t tempfail; 705 size_t linetoolong; 706 size_t delays; 707}; 708 709struct stats { 710 struct s_parent parent; 711 struct s_session mta; 712 struct s_session smtp; 713 714 struct stat_counter counters[STATS_MAX]; 715}; 716 717struct reload { 718 int fd; 719 int ret; 720}; 721 722struct submit_status { 723 u_int64_t id; 724 int code; 725 union submit_path { 726 struct mailaddr maddr; 727 u_int32_t msgid; 728 u_int64_t evpid; 729 char errormsg[MAX_LINE_SIZE + 1]; 730 char dataline[MAX_LINE_SIZE + 1]; 731 } u; 732 enum delivery_flags flags; 733 struct sockaddr_storage ss; 734 struct envelope envelope; 735}; 736 737struct forward_req { 738 u_int64_t id; 739 u_int8_t status; 740 char as_user[MAXLOGNAME]; 741 struct envelope envelope; 742}; 743 744enum dns_status { 745 DNS_OK = 0, 746 DNS_RETRY, 747 DNS_EINVAL, 748 DNS_ENONAME, 749 DNS_ENOTFOUND, 750}; 751 752struct dns { 753 u_int64_t id; 754 char host[MAXHOSTNAMELEN]; 755 int port; 756 int error; 757 int type; 758 struct imsgev *asker; 759 struct sockaddr_storage ss; 760 struct dns *next; 761}; 762 763struct secret { 764 u_int64_t id; 765 char mapname[MAX_PATH_SIZE]; 766 char host[MAXHOSTNAMELEN]; 767 char secret[MAX_LINE_SIZE]; 768}; 769 770struct mda_session { 771 LIST_ENTRY(mda_session) entry; 772 struct envelope msg; 773 struct msgbuf w; 774 struct event ev; 775 u_int32_t id; 776 FILE *datafp; 777}; 778 779struct deliver { 780 char to[PATH_MAX]; 781 char user[MAXLOGNAME]; 782 short mode; 783}; 784 785struct rulematch { 786 u_int64_t id; 787 struct submit_status ss; 788}; 789 790enum lka_session_flags { 791 F_ERROR = 0x1 792}; 793 794struct lka_session { 795 SPLAY_ENTRY(lka_session) nodes; 796 u_int64_t id; 797 798 struct deliverylist deliverylist; 799 struct expandtree expandtree; 800 801 u_int8_t iterations; 802 u_int32_t pending; 803 enum lka_session_flags flags; 804 struct submit_status ss; 805}; 806 807struct filter { 808 TAILQ_ENTRY(filter) f_entry; 809 pid_t pid; 810 struct event ev; 811 struct imsgbuf *ibuf; 812 char name[MAX_FILTER_NAME]; 813 char path[MAXPATHLEN]; 814}; 815 816struct mfa_session { 817 SPLAY_ENTRY(mfa_session) nodes; 818 u_int64_t id; 819 820 enum session_state state; 821 struct submit_status ss; 822 struct filter *filter; 823 struct filter_msg fm; 824}; 825 826enum mta_state { 827 MTA_INVALID_STATE, 828 MTA_INIT, 829 MTA_SECRET, 830 MTA_DATA, 831 MTA_MX, 832 MTA_CONNECT, 833 MTA_PTR, 834 MTA_PROTOCOL, 835 MTA_DONE 836}; 837 838/* mta session flags */ 839#define MTA_FORCE_ANYSSL 0x01 840#define MTA_FORCE_SMTPS 0x02 841#define MTA_ALLOW_PLAIN 0x04 842#define MTA_USE_AUTH 0x08 843#define MTA_FORCE_MX 0x10 844 845struct mta_relay { 846 TAILQ_ENTRY(mta_relay) entry; 847 struct sockaddr_storage sa; 848 char fqdn[MAXHOSTNAMELEN]; 849 int used; 850}; 851 852struct mta_session { 853 SPLAY_ENTRY(mta_session) entry; 854 u_int64_t id; 855 enum mta_state state; 856 char *host; 857 int port; 858 int flags; 859 TAILQ_HEAD(,envelope) recipients; 860 TAILQ_HEAD(,mta_relay) relays; 861 char *authmap; 862 char *secret; 863 int fd; 864 FILE *datafp; 865 struct event ev; 866 char *cert; 867 void *pcb; 868 struct ramqueue_batch *batch; 869}; 870 871 872/* maps return structures */ 873struct map_secret { 874 char username[MAX_LINE_SIZE]; 875 char password[MAX_LINE_SIZE]; 876}; 877 878struct map_alias { 879 size_t nbnodes; 880 struct expandtree expandtree; 881}; 882 883struct map_virtual { 884 size_t nbnodes; 885 struct expandtree expandtree; 886}; 887 888 889/* queue structures */ 890enum queue_type { 891 QT_INVALID=0, 892 QT_FS 893}; 894 895enum queue_kind { 896 Q_INVALID=0, 897 Q_ENQUEUE, 898 Q_INCOMING, 899 Q_QUEUE, 900 Q_PURGE, 901 Q_OFFLINE, 902 Q_BOUNCE, 903 Q_CORRUPT 904}; 905 906enum queue_op { 907 QOP_INVALID=0, 908 QOP_CREATE, 909 QOP_DELETE, 910 QOP_UPDATE, 911 QOP_COMMIT, 912 QOP_LOAD, 913 QOP_FD_R, 914 QOP_FD_RW, 915 QOP_PURGE, 916 QOP_CORRUPT, 917}; 918 919struct queue_backend { 920 enum queue_type type; 921 int (*init)(void); 922 int (*message)(enum queue_kind, enum queue_op, u_int32_t *); 923 int (*envelope)(enum queue_kind, enum queue_op, struct envelope *); 924}; 925 926 927/* auth structures */ 928enum auth_type { 929 AUTH_INVALID=0, 930 AUTH_BSD, 931 AUTH_GETPWNAM, 932}; 933 934struct auth_backend { 935 enum auth_type type; 936 int (*authenticate)(char *, char *); 937}; 938 939 940/* user structures */ 941enum user_type { 942 USER_INVALID=0, 943 USER_GETPWNAM, 944}; 945 946#define MAXPASSWORDLEN 128 947struct user { 948 char username[MAXLOGNAME]; 949 char directory[MAXPATHLEN]; 950 char password[MAXPASSWORDLEN]; 951 uid_t uid; 952 gid_t gid; 953}; 954 955struct user_backend { 956 enum user_type type; 957 int (*getbyname)(struct user *, char *); 958 int (*getbyuid)(struct user *, uid_t); 959}; 960 961 962extern struct smtpd *env; 963extern void (*imsg_callback)(struct imsgev *, struct imsg *); 964 965 966/* aliases.c */ 967int aliases_exist(objid_t, char *); 968int aliases_get(objid_t, struct expandtree *, char *); 969int aliases_vdomain_exists(objid_t, char *); 970int aliases_virtual_exist(objid_t, struct mailaddr *); 971int aliases_virtual_get(objid_t, struct expandtree *, struct mailaddr *); 972int alias_parse(struct expandnode *, char *); 973 974 975/* auth_backend.c */ 976struct auth_backend *auth_backend_lookup(enum auth_type); 977 978 979/* bounce.c */ 980int bounce_session(int, struct envelope *); 981int bounce_session_switch(FILE *, enum session_state *, char *, struct envelope *); 982void bounce_event(int, short, void *); 983 984 985/* config.c */ 986#define PURGE_LISTENERS 0x01 987#define PURGE_MAPS 0x02 988#define PURGE_RULES 0x04 989#define PURGE_SSL 0x08 990#define PURGE_EVERYTHING 0xff 991void purge_config(u_int8_t); 992void unconfigure(void); 993void configure(void); 994void init_pipes(void); 995void config_pipes(struct peer *, u_int); 996void config_peers(struct peer *, u_int); 997 998 999/* control.c */ 1000pid_t control(void); 1001void session_socket_blockmode(int, enum blockmodes); 1002void session_socket_no_linger(int); 1003int session_socket_error(int); 1004 1005 1006/* dns.c */ 1007void dns_query_host(char *, int, u_int64_t); 1008void dns_query_mx(char *, int, u_int64_t); 1009void dns_query_ptr(struct sockaddr_storage *, u_int64_t); 1010void dns_async(struct imsgev *, int, struct dns *); 1011 1012 1013/* enqueue.c */ 1014int enqueue(int, char **); 1015int enqueue_offline(int, char **); 1016 1017 1018/* expand.c */ 1019int expand_cmp(struct expandnode *, struct expandnode *); 1020void expandtree_increment_node(struct expandtree *, struct expandnode *); 1021void expandtree_decrement_node(struct expandtree *, struct expandnode *); 1022void expandtree_remove_node(struct expandtree *, struct expandnode *); 1023struct expandnode *expandtree_lookup(struct expandtree *, struct expandnode *); 1024void expandtree_free_nodes(struct expandtree *); 1025RB_PROTOTYPE(expandtree, expandnode, nodes, expand_cmp); 1026 1027 1028/* forward.c */ 1029int forwards_get(int, struct expandtree *, char *); 1030 1031 1032/* lka.c */ 1033pid_t lka(void); 1034int lka_session_cmp(struct lka_session *, struct lka_session *); 1035SPLAY_PROTOTYPE(lkatree, lka_session, nodes, lka_session_cmp); 1036 1037/* lka_session.c */ 1038struct lka_session *lka_session_init(struct submit_status *); 1039void lka_session_fail(struct lka_session *); 1040void lka_session_destroy(struct lka_session *); 1041 1042 1043/* map.c */ 1044void *map_lookup(objid_t, char *, enum map_kind); 1045struct map *map_find(objid_t); 1046struct map *map_findbyname(const char *); 1047 1048 1049/* mda.c */ 1050pid_t mda(void); 1051 1052 1053/* mfa.c */ 1054pid_t mfa(void); 1055int mfa_session_cmp(struct mfa_session *, struct mfa_session *); 1056SPLAY_PROTOTYPE(mfatree, mfa_session, nodes, mfa_session_cmp); 1057 1058/* mta.c */ 1059pid_t mta(void); 1060int mta_session_cmp(struct mta_session *, struct mta_session *); 1061SPLAY_PROTOTYPE(mtatree, mta_session, entry, mta_session_cmp); 1062 1063 1064/* parse.y */ 1065int parse_config(struct smtpd *, const char *, int); 1066int cmdline_symset(char *); 1067 1068 1069/* queue.c */ 1070pid_t queue(void); 1071void queue_submit_envelope(struct envelope *); 1072void queue_commit_envelopes(struct envelope *); 1073 1074 1075/* queue_backend.c */ 1076struct queue_backend *queue_backend_lookup(enum queue_type); 1077int queue_message_create(enum queue_kind, u_int32_t *); 1078int queue_message_delete(enum queue_kind, u_int32_t); 1079int queue_message_commit(enum queue_kind, u_int32_t); 1080int queue_message_fd_r(enum queue_kind, u_int32_t); 1081int queue_message_fd_rw(enum queue_kind, u_int32_t); 1082int queue_message_purge(enum queue_kind, u_int32_t); 1083int queue_message_corrupt(enum queue_kind, u_int32_t); 1084int queue_envelope_create(enum queue_kind, struct envelope *); 1085int queue_envelope_delete(enum queue_kind, struct envelope *); 1086int queue_envelope_load(enum queue_kind, u_int64_t, struct envelope *); 1087int queue_envelope_update(enum queue_kind, struct envelope *); 1088 1089 1090/* queue_shared.c */ 1091void queue_message_update(struct envelope *); 1092struct qwalk *qwalk_new(char *); 1093int qwalk(struct qwalk *, char *); 1094void qwalk_close(struct qwalk *); 1095int bounce_record_message(struct envelope *, struct envelope *); 1096void show_queue(char *, int); 1097 1098 1099/* ramqueue.c */ 1100void ramqueue_init(struct ramqueue *); 1101int ramqueue_load(struct ramqueue *, time_t *); 1102int ramqueue_load_offline(struct ramqueue *); 1103int ramqueue_host_cmp(struct ramqueue_host *, struct ramqueue_host *); 1104int ramqueue_msg_cmp(struct ramqueue_message *, struct ramqueue_message *); 1105int ramqueue_evp_cmp(struct ramqueue_envelope *, struct ramqueue_envelope *); 1106int ramqueue_is_empty(struct ramqueue *); 1107int ramqueue_is_empty(struct ramqueue *); 1108int ramqueue_batch_is_empty(struct ramqueue_batch *); 1109int ramqueue_host_is_empty(struct ramqueue_host *); 1110void ramqueue_remove_batch(struct ramqueue_host *, struct ramqueue_batch *); 1111void ramqueue_remove_host(struct ramqueue *, struct ramqueue_host *); 1112struct ramqueue_envelope *ramqueue_envelope_by_id(struct ramqueue *, u_int64_t); 1113struct ramqueue_envelope *ramqueue_first_envelope(struct ramqueue *); 1114struct ramqueue_envelope *ramqueue_next_envelope(struct ramqueue *); 1115struct ramqueue_envelope *ramqueue_batch_first_envelope(struct ramqueue_batch *); 1116void ramqueue_insert(struct ramqueue *, struct envelope *, time_t); 1117int ramqueue_message_is_empty(struct ramqueue_message *); 1118void ramqueue_remove_message(struct ramqueue *, struct ramqueue_message *); 1119 1120struct ramqueue_host *ramqueue_lookup_host(struct ramqueue *, char *); 1121struct ramqueue_message *ramqueue_lookup_message(struct ramqueue *, u_int32_t); 1122struct ramqueue_envelope *ramqueue_lookup_envelope(struct ramqueue *, u_int64_t); 1123 1124void ramqueue_schedule(struct ramqueue *, u_int64_t); 1125void ramqueue_schedule_envelope(struct ramqueue *, struct ramqueue_envelope *); 1126 1127void ramqueue_remove_envelope(struct ramqueue *, struct ramqueue_envelope *); 1128 1129 1130RB_PROTOTYPE(hosttree, ramqueue_host, hosttree_entry, ramqueue_host_cmp); 1131RB_PROTOTYPE(msgtree, ramqueue_message, msg_entry, ramqueue_msg_cmp); 1132RB_PROTOTYPE(evptree, ramqueue_envelope, evp_entry, ramqueue_evp_cmp); 1133 1134 1135/* runner.c */ 1136pid_t runner(void); 1137void message_reset_flags(struct envelope *); 1138void runner_schedule(struct ramqueue *, u_int64_t); 1139void runner_remove(struct ramqueue *, u_int64_t); 1140void runner_remove_envelope(struct ramqueue *, struct ramqueue_envelope *); 1141 1142 1143/* smtp.c */ 1144pid_t smtp(void); 1145void smtp_resume(void); 1146 1147 1148/* smtp_session.c */ 1149void session_init(struct listener *, struct session *); 1150int session_cmp(struct session *, struct session *); 1151void session_pickup(struct session *, struct submit_status *); 1152void session_destroy(struct session *); 1153void session_respond(struct session *, char *, ...) 1154 __attribute__ ((format (printf, 2, 3))); 1155void session_bufferevent_new(struct session *); 1156SPLAY_PROTOTYPE(sessiontree, session, s_nodes, session_cmp); 1157 1158 1159/* smtpd.c */ 1160int child_cmp(struct child *, struct child *); 1161void imsg_event_add(struct imsgev *); 1162void imsg_compose_event(struct imsgev *, u_int16_t, u_int32_t, pid_t, 1163 int, void *, u_int16_t); 1164void imsg_dispatch(int, short, void *); 1165const char * proc_to_str(int); 1166const char * imsg_to_str(int); 1167SPLAY_PROTOTYPE(childtree, child, entry, child_cmp); 1168 1169 1170/* ssl.c */ 1171void ssl_init(void); 1172void ssl_transaction(struct session *); 1173void ssl_session_init(struct session *); 1174void ssl_session_destroy(struct session *); 1175int ssl_load_certfile(const char *, u_int8_t); 1176void ssl_setup(struct listener *); 1177int ssl_cmp(struct ssl *, struct ssl *); 1178SPLAY_PROTOTYPE(ssltree, ssl, ssl_nodes, ssl_cmp); 1179 1180 1181/* ssl_privsep.c */ 1182int ssl_ctx_use_private_key(void *, char *, off_t); 1183int ssl_ctx_use_certificate_chain(void *, char *, off_t); 1184 1185/* stats.c */ 1186void stat_init(struct stat_counter *, int); 1187size_t stat_get(int, int); 1188size_t stat_increment(int); 1189size_t stat_decrement(int); 1190 1191 1192/* user_backend.c */ 1193struct user_backend *user_backend_lookup(enum user_type); 1194 1195 1196/* util.c */ 1197typedef struct arglist arglist; 1198struct arglist { 1199 char **list; 1200 u_int num; 1201 u_int nalloc; 1202}; 1203void addargs(arglist *, char *, ...) 1204 __attribute__((format(printf, 2, 3))); 1205int bsnprintf(char *, size_t, const char *, ...) 1206 __attribute__ ((format (printf, 3, 4))); 1207int safe_fclose(FILE *); 1208int hostname_match(char *, char *); 1209int email_to_mailaddr(struct mailaddr *, char *); 1210int valid_localpart(char *); 1211int valid_domainpart(char *); 1212char *ss_to_text(struct sockaddr_storage *); 1213int valid_message_id(char *); 1214int valid_message_uid(char *); 1215char *time_to_text(time_t); 1216int secure_file(int, char *, char *, uid_t, int); 1217void lowercase(char *, char *, size_t); 1218void envelope_set_errormsg(struct envelope *, char *, ...); 1219char *envelope_get_errormsg(struct envelope *); 1220void sa_set_port(struct sockaddr *, int); 1221u_int64_t generate_uid(void); 1222void fdlimit(double); 1223int availdesc(void); 1224u_int32_t msgid_generate(void); 1225u_int64_t evpid_generate(u_int32_t); 1226u_int32_t evpid_to_msgid(u_int64_t); 1227u_int64_t msgid_to_evpid(u_int32_t); 1228u_int32_t filename_to_msgid(char *); 1229u_int64_t filename_to_evpid(char *); 1230void log_imsg(int, int, struct imsg*); 1231int ckdir(const char *, mode_t, uid_t, gid_t, int); 1232