1 /* 2 * Copyright (c) 1983 Eric P. Allman 3 * Copyright (c) 1988, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 * 8 * @(#)sendmail.h 8.3 (Berkeley) 07/13/93 9 */ 10 11 /* 12 ** SENDMAIL.H -- Global definitions for sendmail. 13 */ 14 15 # ifdef _DEFINE 16 # define EXTERN 17 # ifndef lint 18 static char SmailSccsId[] = "@(#)sendmail.h 8.3 07/13/93"; 19 # endif 20 # else /* _DEFINE */ 21 # define EXTERN extern 22 # endif /* _DEFINE */ 23 24 # include <unistd.h> 25 # include <stddef.h> 26 # include <stdlib.h> 27 # include <stdio.h> 28 # include <ctype.h> 29 # include <setjmp.h> 30 # include <sysexits.h> 31 # include <string.h> 32 # include <time.h> 33 # include <errno.h> 34 35 # include "conf.h" 36 # include "useful.h" 37 38 # ifdef LOG 39 # include <syslog.h> 40 # endif /* LOG */ 41 42 # ifdef DAEMON 43 # include <sys/socket.h> 44 # endif 45 # ifdef NETINET 46 # include <netinet/in.h> 47 # endif 48 # ifdef NETISO 49 # include <netiso/iso.h> 50 # endif 51 # ifdef NETNS 52 # include <netns/ns.h> 53 # endif 54 # ifdef NETX25 55 # include <netccitt/x25.h> 56 # endif 57 58 59 60 61 /* 62 ** Data structure for bit maps. 63 ** 64 ** Each bit in this map can be referenced by an ascii character. 65 ** This is 128 possible bits, or 12 8-bit bytes. 66 */ 67 68 #define BITMAPBYTES 16 /* number of bytes in a bit map */ 69 #define BYTEBITS 8 /* number of bits in a byte */ 70 71 /* internal macros */ 72 #define _BITWORD(bit) (bit / (BYTEBITS * sizeof (int))) 73 #define _BITBIT(bit) (1 << (bit % (BYTEBITS * sizeof (int)))) 74 75 typedef int BITMAP[BITMAPBYTES / sizeof (int)]; 76 77 /* test bit number N */ 78 #define bitnset(bit, map) ((map)[_BITWORD(bit)] & _BITBIT(bit)) 79 80 /* set bit number N */ 81 #define setbitn(bit, map) (map)[_BITWORD(bit)] |= _BITBIT(bit) 82 83 /* clear bit number N */ 84 #define clrbitn(bit, map) (map)[_BITWORD(bit)] &= ~_BITBIT(bit) 85 86 /* clear an entire bit map */ 87 #define clrbitmap(map) bzero((char *) map, BITMAPBYTES) 88 /* 89 ** Address structure. 90 ** Addresses are stored internally in this structure. 91 */ 92 93 struct address 94 { 95 char *q_paddr; /* the printname for the address */ 96 char *q_user; /* user name */ 97 char *q_ruser; /* real user name, or NULL if q_user */ 98 char *q_host; /* host name */ 99 struct mailer *q_mailer; /* mailer to use */ 100 u_short q_flags; /* status flags, see below */ 101 uid_t q_uid; /* user-id of receiver (if known) */ 102 gid_t q_gid; /* group-id of receiver (if known) */ 103 char *q_home; /* home dir (local mailer only) */ 104 char *q_fullname; /* full name if known */ 105 struct address *q_next; /* chain */ 106 struct address *q_alias; /* address this results from */ 107 char *q_owner; /* owner of q_alias */ 108 struct address *q_tchain; /* temporary use chain */ 109 time_t q_timeout; /* timeout for this address */ 110 }; 111 112 typedef struct address ADDRESS; 113 114 # define QDONTSEND 000001 /* don't send to this address */ 115 # define QBADADDR 000002 /* this address is verified bad */ 116 # define QGOODUID 000004 /* the q_uid q_gid fields are good */ 117 # define QPRIMARY 000010 /* set from argv */ 118 # define QQUEUEUP 000020 /* queue for later transmission */ 119 # define QSENT 000040 /* has been successfully delivered */ 120 # define QNOTREMOTE 000100 /* not an address for remote forwarding */ 121 # define QSELFREF 000200 /* this address references itself */ 122 # define QVERIFIED 000400 /* verified, but not expanded */ 123 # define QREPORT 001000 /* report this address in return message */ 124 /* 125 ** Mailer definition structure. 126 ** Every mailer known to the system is declared in this 127 ** structure. It defines the pathname of the mailer, some 128 ** flags associated with it, and the argument vector to 129 ** pass to it. The flags are defined in conf.c 130 ** 131 ** The argument vector is expanded before actual use. All 132 ** words except the first are passed through the macro 133 ** processor. 134 */ 135 136 struct mailer 137 { 138 char *m_name; /* symbolic name of this mailer */ 139 char *m_mailer; /* pathname of the mailer to use */ 140 BITMAP m_flags; /* status flags, see below */ 141 short m_mno; /* mailer number internally */ 142 char **m_argv; /* template argument vector */ 143 short m_sh_rwset; /* rewrite set: sender header addresses */ 144 short m_se_rwset; /* rewrite set: sender envelope addresses */ 145 short m_rh_rwset; /* rewrite set: recipient header addresses */ 146 short m_re_rwset; /* rewrite set: recipient envelope addresses */ 147 char *m_eol; /* end of line string */ 148 long m_maxsize; /* size limit on message to this mailer */ 149 int m_linelimit; /* max # characters per line */ 150 char *m_execdir; /* directory to chdir to before execv */ 151 }; 152 153 typedef struct mailer MAILER; 154 155 /* bits for m_flags */ 156 # define M_ESMTP 'a' /* run Extended SMTP protocol */ 157 # define M_BLANKEND 'b' /* ensure blank line at end of message */ 158 # define M_NOCOMMENT 'c' /* don't include comment part of address */ 159 # define M_CANONICAL 'C' /* make addresses canonical "u@dom" */ 160 /* 'D' /* CF: include Date: */ 161 # define M_EXPENSIVE 'e' /* it costs to use this mailer.... */ 162 # define M_ESCFROM 'E' /* escape From lines to >From */ 163 # define M_FOPT 'f' /* mailer takes picky -f flag */ 164 /* 'F' /* CF: include From: or Resent-From: */ 165 # define M_NO_NULL_FROM 'g' /* sender of errors should be $g */ 166 # define M_HST_UPPER 'h' /* preserve host case distinction */ 167 /* 'H' /* UIUC: MAIL11V3: preview headers */ 168 # define M_INTERNAL 'I' /* SMTP to another sendmail site */ 169 # define M_LOCALMAILER 'l' /* delivery is to this host */ 170 # define M_LIMITS 'L' /* must enforce SMTP line limits */ 171 # define M_MUSER 'm' /* can handle multiple users at once */ 172 /* 'M' /* CF: include Message-Id: */ 173 # define M_NHDR 'n' /* don't insert From line */ 174 /* 'N' /* UIUC: MAIL11V3: DATA returns multi-status */ 175 # define M_FROMPATH 'p' /* use reverse-path in MAIL FROM: */ 176 /* 'P' /* CF: include Return-Path: */ 177 # define M_ROPT 'r' /* mailer takes picky -r flag */ 178 # define M_SECURE_PORT 'R' /* try to send on a reserved TCP port */ 179 # define M_STRIPQ 's' /* strip quote chars from user/host */ 180 # define M_RESTR 'S' /* must be daemon to execute */ 181 # define M_USR_UPPER 'u' /* preserve user case distinction */ 182 # define M_UGLYUUCP 'U' /* this wants an ugly UUCP from line */ 183 /* 'V' /* UIUC: !-relativize all addresses */ 184 /* 'x' /* CF: include Full-Name: */ 185 # define M_XDOT 'X' /* use hidden-dot algorithm */ 186 # define M_7BITS '7' /* use 7-bit path */ 187 188 EXTERN MAILER *Mailer[MAXMAILERS+1]; 189 190 EXTERN MAILER *LocalMailer; /* ptr to local mailer */ 191 EXTERN MAILER *ProgMailer; /* ptr to program mailer */ 192 EXTERN MAILER *FileMailer; /* ptr to *file* mailer */ 193 EXTERN MAILER *InclMailer; /* ptr to *include* mailer */ 194 /* 195 ** Header structure. 196 ** This structure is used internally to store header items. 197 */ 198 199 struct header 200 { 201 char *h_field; /* the name of the field */ 202 char *h_value; /* the value of that field */ 203 struct header *h_link; /* the next header */ 204 u_short h_flags; /* status bits, see below */ 205 BITMAP h_mflags; /* m_flags bits needed */ 206 }; 207 208 typedef struct header HDR; 209 210 /* 211 ** Header information structure. 212 ** Defined in conf.c, this struct declares the header fields 213 ** that have some magic meaning. 214 */ 215 216 struct hdrinfo 217 { 218 char *hi_field; /* the name of the field */ 219 u_short hi_flags; /* status bits, see below */ 220 }; 221 222 extern struct hdrinfo HdrInfo[]; 223 224 /* bits for h_flags and hi_flags */ 225 # define H_EOH 00001 /* this field terminates header */ 226 # define H_RCPT 00002 /* contains recipient addresses */ 227 # define H_DEFAULT 00004 /* if another value is found, drop this */ 228 # define H_RESENT 00010 /* this address is a "Resent-..." address */ 229 # define H_CHECK 00020 /* check h_mflags against m_flags */ 230 # define H_ACHECK 00040 /* ditto, but always (not just default) */ 231 # define H_FORCE 00100 /* force this field, even if default */ 232 # define H_TRACE 00200 /* this field contains trace information */ 233 # define H_FROM 00400 /* this is a from-type field */ 234 # define H_VALID 01000 /* this field has a validated value */ 235 # define H_RECEIPTTO 02000 /* this field has return receipt info */ 236 # define H_ERRORSTO 04000 /* this field has error address info */ 237 /* 238 ** Envelope structure. 239 ** This structure defines the message itself. There is usually 240 ** only one of these -- for the message that we originally read 241 ** and which is our primary interest -- but other envelopes can 242 ** be generated during processing. For example, error messages 243 ** will have their own envelope. 244 */ 245 246 # define ENVELOPE struct envelope 247 248 ENVELOPE 249 { 250 HDR *e_header; /* head of header list */ 251 long e_msgpriority; /* adjusted priority of this message */ 252 time_t e_ctime; /* time message appeared in the queue */ 253 char *e_to; /* the target person */ 254 char *e_receiptto; /* return receipt address */ 255 ADDRESS e_from; /* the person it is from */ 256 char *e_sender; /* e_from.q_paddr w comments stripped */ 257 char **e_fromdomain; /* the domain part of the sender */ 258 ADDRESS *e_sendqueue; /* list of message recipients */ 259 ADDRESS *e_errorqueue; /* the queue for error responses */ 260 long e_msgsize; /* size of the message in bytes */ 261 int e_nrcpts; /* number of recipients */ 262 short e_class; /* msg class (priority, junk, etc.) */ 263 short e_flags; /* flags, see below */ 264 short e_hopcount; /* number of times processed */ 265 short e_nsent; /* number of sends since checkpoint */ 266 short e_sendmode; /* message send mode */ 267 short e_errormode; /* error return mode */ 268 int (*e_puthdr)__P((FILE *, MAILER *, ENVELOPE *)); 269 /* function to put header of message */ 270 int (*e_putbody)__P((FILE *, MAILER *, ENVELOPE *, char *)); 271 /* function to put body of message */ 272 struct envelope *e_parent; /* the message this one encloses */ 273 struct envelope *e_sibling; /* the next envelope of interest */ 274 char *e_bodytype; /* type of message body */ 275 char *e_df; /* location of temp file */ 276 FILE *e_dfp; /* temporary file */ 277 char *e_id; /* code for this entry in queue */ 278 FILE *e_xfp; /* transcript file */ 279 FILE *e_lockfp; /* the lock file for this message */ 280 char *e_message; /* error message */ 281 char *e_statmsg; /* stat msg (changes per delivery) */ 282 char *e_msgboundary; /* MIME-style message part boundary */ 283 char *e_macro[128]; /* macro definitions */ 284 }; 285 286 /* values for e_flags */ 287 #define EF_OLDSTYLE 000001 /* use spaces (not commas) in hdrs */ 288 #define EF_INQUEUE 000002 /* this message is fully queued */ 289 #define EF_TIMEOUT 000004 /* this message is too old */ 290 #define EF_CLRQUEUE 000010 /* disk copy is no longer needed */ 291 #define EF_SENDRECEIPT 000020 /* send a return receipt */ 292 #define EF_FATALERRS 000040 /* fatal errors occured */ 293 #define EF_KEEPQUEUE 000100 /* keep queue files always */ 294 #define EF_RESPONSE 000200 /* this is an error or return receipt */ 295 #define EF_RESENT 000400 /* this message is being forwarded */ 296 #define EF_VRFYONLY 001000 /* verify only (don't expand aliases) */ 297 #define EF_WARNING 002000 /* warning message has been sent */ 298 #define EF_QUEUERUN 004000 /* this envelope is from queue */ 299 300 EXTERN ENVELOPE *CurEnv; /* envelope currently being processed */ 301 /* 302 ** Message priority classes. 303 ** 304 ** The message class is read directly from the Priority: header 305 ** field in the message. 306 ** 307 ** CurEnv->e_msgpriority is the number of bytes in the message plus 308 ** the creation time (so that jobs ``tend'' to be ordered correctly), 309 ** adjusted by the message class, the number of recipients, and the 310 ** amount of time the message has been sitting around. This number 311 ** is used to order the queue. Higher values mean LOWER priority. 312 ** 313 ** Each priority class point is worth WkClassFact priority points; 314 ** each recipient is worth WkRecipFact priority points. Each time 315 ** we reprocess a message the priority is adjusted by WkTimeFact. 316 ** WkTimeFact should normally decrease the priority so that jobs 317 ** that have historically failed will be run later; thanks go to 318 ** Jay Lepreau at Utah for pointing out the error in my thinking. 319 ** 320 ** The "class" is this number, unadjusted by the age or size of 321 ** this message. Classes with negative representations will have 322 ** error messages thrown away if they are not local. 323 */ 324 325 struct priority 326 { 327 char *pri_name; /* external name of priority */ 328 int pri_val; /* internal value for same */ 329 }; 330 331 EXTERN struct priority Priorities[MAXPRIORITIES]; 332 EXTERN int NumPriorities; /* pointer into Priorities */ 333 /* 334 ** Rewrite rules. 335 */ 336 337 struct rewrite 338 { 339 char **r_lhs; /* pattern match */ 340 char **r_rhs; /* substitution value */ 341 struct rewrite *r_next;/* next in chain */ 342 }; 343 344 EXTERN struct rewrite *RewriteRules[MAXRWSETS]; 345 346 /* 347 ** Special characters in rewriting rules. 348 ** These are used internally only. 349 ** The COND* rules are actually used in macros rather than in 350 ** rewriting rules, but are given here because they 351 ** cannot conflict. 352 */ 353 354 /* left hand side items */ 355 # define MATCHZANY 0220 /* match zero or more tokens */ 356 # define MATCHANY 0221 /* match one or more tokens */ 357 # define MATCHONE 0222 /* match exactly one token */ 358 # define MATCHCLASS 0223 /* match one token in a class */ 359 # define MATCHNCLASS 0224 /* match anything not in class */ 360 # define MATCHREPL 0225 /* replacement on RHS for above */ 361 362 /* right hand side items */ 363 # define CANONNET 0226 /* canonical net, next token */ 364 # define CANONHOST 0227 /* canonical host, next token */ 365 # define CANONUSER 0230 /* canonical user, next N tokens */ 366 # define CALLSUBR 0231 /* call another rewriting set */ 367 368 /* conditionals in macros */ 369 # define CONDIF 0232 /* conditional if-then */ 370 # define CONDELSE 0233 /* conditional else */ 371 # define CONDFI 0234 /* conditional fi */ 372 373 /* bracket characters for host name lookup */ 374 # define HOSTBEGIN 0235 /* hostname lookup begin */ 375 # define HOSTEND 0236 /* hostname lookup end */ 376 377 /* bracket characters for generalized lookup */ 378 # define LOOKUPBEGIN 0205 /* generalized lookup begin */ 379 # define LOOKUPEND 0206 /* generalized lookup end */ 380 381 /* macro substitution character */ 382 # define MACROEXPAND 0201 /* macro expansion */ 383 # define MACRODEXPAND 0202 /* deferred macro expansion */ 384 385 /* to make the code clearer */ 386 # define MATCHZERO CANONHOST 387 388 /* external <==> internal mapping table */ 389 struct metamac 390 { 391 char metaname; /* external code (after $) */ 392 char metaval; /* internal code (as above) */ 393 }; 394 /* 395 ** Information about currently open connections to mailers, or to 396 ** hosts that we have looked up recently. 397 */ 398 399 # define MCI struct mailer_con_info 400 401 MCI 402 { 403 short mci_flags; /* flag bits, see below */ 404 short mci_errno; /* error number on last connection */ 405 short mci_herrno; /* h_errno from last DNS lookup */ 406 short mci_exitstat; /* exit status from last connection */ 407 short mci_state; /* SMTP state */ 408 long mci_maxsize; /* max size this server will accept */ 409 FILE *mci_in; /* input side of connection */ 410 FILE *mci_out; /* output side of connection */ 411 int mci_pid; /* process id of subordinate proc */ 412 char *mci_phase; /* SMTP phase string */ 413 struct mailer *mci_mailer; /* ptr to the mailer for this conn */ 414 char *mci_host; /* host name */ 415 time_t mci_lastuse; /* last usage time */ 416 }; 417 418 419 /* flag bits */ 420 #define MCIF_VALID 000001 /* this entry is valid */ 421 #define MCIF_TEMP 000002 /* don't cache this connection */ 422 #define MCIF_CACHED 000004 /* currently in open cache */ 423 #define MCIF_ESMTP 000010 /* this host speaks ESMTP */ 424 #define MCIF_EXPN 000020 /* EXPN command supported */ 425 #define MCIF_SIZE 000040 /* SIZE option supported */ 426 #define MCIF_8BITMIME 000100 /* BODY=8BITMIME supported */ 427 428 /* states */ 429 #define MCIS_CLOSED 0 /* no traffic on this connection */ 430 #define MCIS_OPENING 1 /* sending initial protocol */ 431 #define MCIS_OPEN 2 /* open, initial protocol sent */ 432 #define MCIS_ACTIVE 3 /* message being sent */ 433 #define MCIS_QUITING 4 /* running quit protocol */ 434 #define MCIS_SSD 5 /* service shutting down */ 435 #define MCIS_ERROR 6 /* I/O error on connection */ 436 /* 437 ** Name canonification short circuit. 438 ** 439 ** If the name server for a host is down, the process of trying to 440 ** canonify the name can hang. This is similar to (but alas, not 441 ** identical to) looking up the name for delivery. This stab type 442 ** caches the result of the name server lookup so we don't hang 443 ** multiple times. 444 */ 445 446 #define NAMECANON struct _namecanon 447 448 NAMECANON 449 { 450 short nc_errno; /* cached errno */ 451 short nc_herrno; /* cached h_errno */ 452 short nc_stat; /* cached exit status code */ 453 short nc_flags; /* flag bits */ 454 char *nc_cname; /* the canonical name */ 455 }; 456 457 /* values for nc_flags */ 458 #define NCF_VALID 0x0001 /* entry valid */ 459 /* 460 ** Mapping functions 461 ** 462 ** These allow arbitrary mappings in the config file. The idea 463 ** (albeit not the implementation) comes from IDA sendmail. 464 */ 465 466 # define MAPCLASS struct _mapclass 467 # define MAP struct _map 468 469 470 /* 471 ** An actual map. 472 */ 473 474 MAP 475 { 476 MAPCLASS *map_class; /* the class of this map */ 477 char *map_mname; /* name of this map */ 478 int map_mflags; /* flags, see below */ 479 char *map_file; /* the (nominal) filename */ 480 void *map_db1; /* the open database ptr */ 481 void *map_db2; /* an "extra" database pointer */ 482 char *map_app; /* to append to successful matches */ 483 char *map_domain; /* the (nominal) NIS domain */ 484 char *map_rebuild; /* program to run to do auto-rebuild */ 485 }; 486 487 /* bit values for map_flags */ 488 # define MF_VALID 0x0001 /* this entry is valid */ 489 # define MF_INCLNULL 0x0002 /* include null byte in key */ 490 # define MF_OPTIONAL 0x0004 /* don't complain if map not found */ 491 # define MF_NOFOLDCASE 0x0008 /* don't fold case in keys */ 492 # define MF_MATCHONLY 0x0010 /* don't use the map value */ 493 # define MF_OPEN 0x0020 /* this entry is open */ 494 # define MF_WRITABLE 0x0040 /* open for writing */ 495 # define MF_ALIAS 0x0080 /* this is an alias file */ 496 # define MF_TRY0NULL 0x0100 /* try with no null byte */ 497 # define MF_TRY1NULL 0x0200 /* try with the null byte */ 498 # define MF_IMPL_HASH 0x1000 /* implicit: underlying hash database */ 499 # define MF_IMPL_NDBM 0x2000 /* implicit: underlying NDBM database */ 500 501 502 /* 503 ** The class of a map -- essentially the functions to call 504 */ 505 506 MAPCLASS 507 { 508 char *map_cname; /* name of this map class */ 509 char *map_ext; /* extension for database file */ 510 short map_cflags; /* flag bits, see below */ 511 bool (*map_parse)__P((MAP *, char *)); 512 /* argument parsing function */ 513 char *(*map_lookup)__P((MAP *, char *, char **, int *)); 514 /* lookup function */ 515 void (*map_store)__P((MAP *, char *, char *)); 516 /* store function */ 517 bool (*map_open)__P((MAP *, int)); 518 /* open function */ 519 void (*map_close)__P((MAP *)); 520 /* close function */ 521 }; 522 523 /* bit values for map_cflags */ 524 #define MCF_ALIASOK 0x0001 /* can be used for aliases */ 525 #define MCF_ALIASONLY 0x0002 /* usable only for aliases */ 526 #define MCF_REBUILDABLE 0x0004 /* can rebuild alias files */ 527 /* 528 ** Symbol table definitions 529 */ 530 531 struct symtab 532 { 533 char *s_name; /* name to be entered */ 534 char s_type; /* general type (see below) */ 535 struct symtab *s_next; /* pointer to next in chain */ 536 union 537 { 538 BITMAP sv_class; /* bit-map of word classes */ 539 ADDRESS *sv_addr; /* pointer to address header */ 540 MAILER *sv_mailer; /* pointer to mailer */ 541 char *sv_alias; /* alias */ 542 MAPCLASS sv_mapclass; /* mapping function class */ 543 MAP sv_map; /* mapping function */ 544 char *sv_hostsig; /* host signature */ 545 MCI sv_mci; /* mailer connection info */ 546 NAMECANON sv_namecanon; /* canonical name cache */ 547 } s_value; 548 }; 549 550 typedef struct symtab STAB; 551 552 /* symbol types */ 553 # define ST_UNDEF 0 /* undefined type */ 554 # define ST_CLASS 1 /* class map */ 555 # define ST_ADDRESS 2 /* an address in parsed format */ 556 # define ST_MAILER 3 /* a mailer header */ 557 # define ST_ALIAS 4 /* an alias */ 558 # define ST_MAPCLASS 5 /* mapping function class */ 559 # define ST_MAP 6 /* mapping function */ 560 # define ST_HOSTSIG 7 /* host signature */ 561 # define ST_NAMECANON 8 /* cached canonical name */ 562 # define ST_MCI 16 /* mailer connection info (offset) */ 563 564 # define s_class s_value.sv_class 565 # define s_address s_value.sv_addr 566 # define s_mailer s_value.sv_mailer 567 # define s_alias s_value.sv_alias 568 # define s_mci s_value.sv_mci 569 # define s_mapclass s_value.sv_mapclass 570 # define s_hostsig s_value.sv_hostsig 571 # define s_map s_value.sv_map 572 # define s_namecanon s_value.sv_namecanon 573 574 extern STAB *stab __P((char *, int, int)); 575 extern void stabapply __P((void (*)(STAB *, int), int)); 576 577 /* opcodes to stab */ 578 # define ST_FIND 0 /* find entry */ 579 # define ST_ENTER 1 /* enter if not there */ 580 /* 581 ** STRUCT EVENT -- event queue. 582 ** 583 ** Maintained in sorted order. 584 ** 585 ** We store the pid of the process that set this event to insure 586 ** that when we fork we will not take events intended for the parent. 587 */ 588 589 struct event 590 { 591 time_t ev_time; /* time of the function call */ 592 int (*ev_func)__P((int)); 593 /* function to call */ 594 int ev_arg; /* argument to ev_func */ 595 int ev_pid; /* pid that set this event */ 596 struct event *ev_link; /* link to next item */ 597 }; 598 599 typedef struct event EVENT; 600 601 EXTERN EVENT *EventQueue; /* head of event queue */ 602 /* 603 ** Operation, send, and error modes 604 ** 605 ** The operation mode describes the basic operation of sendmail. 606 ** This can be set from the command line, and is "send mail" by 607 ** default. 608 ** 609 ** The send mode tells how to send mail. It can be set in the 610 ** configuration file. It's setting determines how quickly the 611 ** mail will be delivered versus the load on your system. If the 612 ** -v (verbose) flag is given, it will be forced to SM_DELIVER 613 ** mode. 614 ** 615 ** The error mode tells how to return errors. 616 */ 617 618 EXTERN char OpMode; /* operation mode, see below */ 619 620 #define MD_DELIVER 'm' /* be a mail sender */ 621 #define MD_SMTP 's' /* run SMTP on standard input */ 622 #define MD_DAEMON 'd' /* run as a daemon */ 623 #define MD_VERIFY 'v' /* verify: don't collect or deliver */ 624 #define MD_TEST 't' /* test mode: resolve addrs only */ 625 #define MD_INITALIAS 'i' /* initialize alias database */ 626 #define MD_PRINT 'p' /* print the queue */ 627 #define MD_FREEZE 'z' /* freeze the configuration file */ 628 629 630 /* values for e_sendmode -- send modes */ 631 #define SM_DELIVER 'i' /* interactive delivery */ 632 #define SM_QUICKD 'j' /* deliver w/o queueing */ 633 #define SM_FORK 'b' /* deliver in background */ 634 #define SM_QUEUE 'q' /* queue, don't deliver */ 635 #define SM_VERIFY 'v' /* verify only (used internally) */ 636 637 /* used only as a parameter to sendall */ 638 #define SM_DEFAULT '\0' /* unspecified, use SendMode */ 639 640 641 /* values for e_errormode -- error handling modes */ 642 #define EM_PRINT 'p' /* print errors */ 643 #define EM_MAIL 'm' /* mail back errors */ 644 #define EM_WRITE 'w' /* write back errors */ 645 #define EM_BERKNET 'e' /* special berknet processing */ 646 #define EM_QUIET 'q' /* don't print messages (stat only) */ 647 /* 648 ** Additional definitions 649 */ 650 651 652 /* Offset used to ensure that name server error * codes are unique */ 653 #define MAX_ERRNO 100 654 655 656 /* 657 ** Privacy flags 658 ** These are bit values for the PrivacyFlags word. 659 */ 660 661 #define PRIV_PUBLIC 0 /* what have I got to hide? */ 662 #define PRIV_NEEDMAILHELO 00001 /* insist on HELO for MAIL, at least */ 663 #define PRIV_NEEDEXPNHELO 00002 /* insist on HELO for EXPN */ 664 #define PRIV_NEEDVRFYHELO 00004 /* insist on HELO for VRFY */ 665 #define PRIV_NOEXPN 00010 /* disallow EXPN command entirely */ 666 #define PRIV_NOVRFY 00020 /* disallow VRFY command entirely */ 667 #define PRIV_AUTHWARNINGS 00040 /* flag possible authorization probs */ 668 #define PRIV_RESTRMAILQ 01000 /* restrict mailq command */ 669 #define PRIV_GOAWAY 00777 /* don't give no info, anyway, anyhow */ 670 671 /* struct defining such things */ 672 struct prival 673 { 674 char *pv_name; /* name of privacy flag */ 675 int pv_flag; /* numeric level */ 676 }; 677 678 679 /* 680 ** Flags passed to remotename 681 */ 682 683 #define RF_SENDERADDR 0001 /* this is a sender address */ 684 #define RF_HEADERADDR 0002 /* this is a header address */ 685 #define RF_CANONICAL 0004 /* strip comment information */ 686 #define RF_ADDDOMAIN 0010 /* OK to do domain extension */ 687 688 689 /* 690 ** Regular UNIX sockaddrs are too small to handle ISO addresses, so 691 ** we are forced to declare a supertype here. 692 */ 693 694 union bigsockaddr 695 { 696 struct sockaddr sa; /* general version */ 697 #ifdef NETINET 698 struct sockaddr_in sin; /* INET family */ 699 #endif 700 #ifdef NETISO 701 struct sockaddr_iso siso; /* ISO family */ 702 #endif 703 #ifdef NETNS 704 struct sockaddr_ns sns; /* XNS family */ 705 #endif 706 #ifdef NETX25 707 struct sockaddr_x25 sx25; /* X.25 family */ 708 #endif 709 }; 710 711 #define SOCKADDR union bigsockaddr 712 713 /* 714 ** Global variables. 715 */ 716 717 EXTERN bool FromFlag; /* if set, "From" person is explicit */ 718 EXTERN bool MeToo; /* send to the sender also */ 719 EXTERN bool IgnrDot; /* don't let dot end messages */ 720 EXTERN bool SaveFrom; /* save leading "From" lines */ 721 EXTERN bool Verbose; /* set if blow-by-blow desired */ 722 EXTERN bool GrabTo; /* if set, get recipients from msg */ 723 EXTERN bool NoReturn; /* don't return letter to sender */ 724 EXTERN bool SuprErrs; /* set if we are suppressing errors */ 725 EXTERN bool HoldErrs; /* only output errors to transcript */ 726 EXTERN bool NoConnect; /* don't connect to non-local mailers */ 727 EXTERN bool SuperSafe; /* be extra careful, even if expensive */ 728 EXTERN bool ForkQueueRuns; /* fork for each job when running the queue */ 729 EXTERN bool AutoRebuild; /* auto-rebuild the alias database as needed */ 730 EXTERN bool CheckAliases; /* parse addresses during newaliases */ 731 EXTERN bool NoAlias; /* suppress aliasing */ 732 EXTERN bool UseNameServer; /* use internet domain name server */ 733 EXTERN bool SevenBit; /* force 7-bit data */ 734 EXTERN int SafeAlias; /* minutes to wait until @:@ in alias file */ 735 EXTERN FILE *InChannel; /* input connection */ 736 EXTERN FILE *OutChannel; /* output connection */ 737 EXTERN uid_t RealUid; /* when Daemon, real uid of caller */ 738 EXTERN gid_t RealGid; /* when Daemon, real gid of caller */ 739 EXTERN uid_t DefUid; /* default uid to run as */ 740 EXTERN gid_t DefGid; /* default gid to run as */ 741 EXTERN char *DefUser; /* default user to run as (from DefUid) */ 742 EXTERN int OldUmask; /* umask when sendmail starts up */ 743 EXTERN int Errors; /* set if errors (local to single pass) */ 744 EXTERN int ExitStat; /* exit status code */ 745 EXTERN int AliasLevel; /* depth of aliasing */ 746 EXTERN int LineNumber; /* line number in current input */ 747 EXTERN int LogLevel; /* level of logging to perform */ 748 EXTERN int FileMode; /* mode on files */ 749 EXTERN int QueueLA; /* load average starting forced queueing */ 750 EXTERN int RefuseLA; /* load average refusing connections are */ 751 EXTERN int CurrentLA; /* current load average */ 752 EXTERN long QueueFactor; /* slope of queue function */ 753 EXTERN time_t QueueIntvl; /* intervals between running the queue */ 754 EXTERN char *HelpFile; /* location of SMTP help file */ 755 EXTERN char *ErrMsgFile; /* file to prepend to all error messages */ 756 EXTERN char *StatFile; /* location of statistics summary */ 757 EXTERN char *QueueDir; /* location of queue directory */ 758 EXTERN char *FileName; /* name to print on error messages */ 759 EXTERN char *SmtpPhase; /* current phase in SMTP processing */ 760 EXTERN char *MyHostName; /* name of this host for SMTP messages */ 761 EXTERN char *RealHostName; /* name of host we are talking to */ 762 EXTERN SOCKADDR RealHostAddr; /* address of host we are talking to */ 763 EXTERN char *CurHostName; /* current host we are dealing with */ 764 EXTERN jmp_buf TopFrame; /* branch-to-top-of-loop-on-error frame */ 765 EXTERN bool QuickAbort; /* .... but only if we want a quick abort */ 766 EXTERN bool LogUsrErrs; /* syslog user errors (e.g., SMTP RCPT cmd) */ 767 EXTERN bool SendMIMEErrors; /* send error messages in MIME format */ 768 EXTERN bool MatchGecos; /* look for user names in gecos field */ 769 EXTERN bool UseErrorsTo; /* use Errors-To: header (back compat) */ 770 EXTERN char SpaceSub; /* substitution for <lwsp> */ 771 EXTERN int PrivacyFlags; /* privacy flags */ 772 extern char *ConfFile; /* location of configuration file [conf.c] */ 773 extern char *FreezeFile; /* location of frozen memory image [conf.c] */ 774 extern char *PidFile; /* location of proc id file [conf.c] */ 775 extern ADDRESS NullAddress; /* a null (template) address [main.c] */ 776 EXTERN long WkClassFact; /* multiplier for message class -> priority */ 777 EXTERN long WkRecipFact; /* multiplier for # of recipients -> priority */ 778 EXTERN long WkTimeFact; /* priority offset each time this job is run */ 779 EXTERN char *UdbSpec; /* user database source spec */ 780 EXTERN int MaxHopCount; /* max # of hops until bounce */ 781 EXTERN int ConfigLevel; /* config file level */ 782 EXTERN char *TimeZoneSpec; /* override time zone specification */ 783 EXTERN char *ForwardPath; /* path to search for .forward files */ 784 EXTERN long MinBlocksFree; /* min # of blocks free on queue fs */ 785 EXTERN char *FallBackMX; /* fall back MX host */ 786 EXTERN long MaxMessageSize; /* advertised max size we will accept */ 787 EXTERN char *PostMasterCopy; /* address to get errs cc's */ 788 EXTERN int CheckpointInterval; /* queue file checkpoint interval */ 789 EXTERN bool DontPruneRoutes; /* don't prune source routes */ 790 EXTERN int MaxMciCache; /* maximum entries in MCI cache */ 791 EXTERN time_t MciCacheTimeout; /* maximum idle time on connections */ 792 EXTERN char *QueueLimitRecipient; /* limit queue runs to this recipient */ 793 EXTERN char *QueueLimitSender; /* limit queue runs to this sender */ 794 EXTERN char *QueueLimitId; /* limit queue runs to this id */ 795 EXTERN FILE *TrafficLogFile; /* file in which to log all traffic */ 796 797 798 /* 799 ** Timeouts 800 ** 801 ** Indicated values are the MINIMUM per RFC 1123 section 5.3.2. 802 */ 803 804 EXTERN struct 805 { 806 time_t to_initial; /* initial greeting timeout [5m] */ 807 time_t to_mail; /* MAIL command [5m] */ 808 time_t to_rcpt; /* RCPT command [5m] */ 809 time_t to_datainit; /* DATA initiation [2m] */ 810 time_t to_datablock; /* DATA block [3m] */ 811 time_t to_datafinal; /* DATA completion [10m] */ 812 time_t to_nextcommand; /* next command [5m] */ 813 /* following timeouts are not mentioned in RFC 1123 */ 814 time_t to_rset; /* RSET command */ 815 time_t to_helo; /* HELO command */ 816 time_t to_quit; /* QUIT command */ 817 time_t to_miscshort; /* misc short commands (NOOP, VERB, etc) */ 818 /* following are per message */ 819 time_t to_q_return; /* queue return timeout */ 820 time_t to_q_warning; /* queue warning timeout */ 821 } TimeOuts; 822 823 824 /* 825 ** Trace information 826 */ 827 828 /* trace vector and macros for debugging flags */ 829 EXTERN u_char tTdvect[100]; 830 # define tTd(flag, level) (tTdvect[flag] >= level) 831 # define tTdlevel(flag) (tTdvect[flag]) 832 /* 833 ** Miscellaneous information. 834 */ 835 836 837 838 /* 839 ** Some in-line functions 840 */ 841 842 /* set exit status */ 843 #define setstat(s) { \ 844 if (ExitStat == EX_OK || ExitStat == EX_TEMPFAIL) \ 845 ExitStat = s; \ 846 } 847 848 /* make a copy of a string */ 849 #define newstr(s) strcpy(xalloc(strlen(s) + 1), s) 850 851 #define STRUCTCOPY(s, d) d = s 852 853 854 /* 855 ** Declarations of useful functions 856 */ 857 858 extern ADDRESS *parseaddr __P((char *, ADDRESS *, int, int, char **, ENVELOPE *)); 859 extern char *xalloc __P((int)); 860 extern bool sameaddr __P((ADDRESS *, ADDRESS *)); 861 extern FILE *dfopen __P((char *, int, int)); 862 extern EVENT *setevent __P((time_t, int(*)(), int)); 863 extern char *sfgets __P((char *, int, FILE *, time_t, char *)); 864 extern char *queuename __P((ENVELOPE *, int)); 865 extern time_t curtime __P(()); 866 extern bool transienterror __P((int)); 867 extern const char *errstring __P((int)); 868 extern void expand __P((char *, char *, char *, ENVELOPE *)); 869 extern void define __P((int, char *, ENVELOPE *)); 870 extern char *macvalue __P((int, ENVELOPE *)); 871 extern char **prescan __P((char *, int, char[], char **)); 872 extern char *fgetfolded __P((char *, int, FILE *)); 873 extern ADDRESS *recipient __P((ADDRESS *, ADDRESS **, ENVELOPE *)); 874 extern ENVELOPE *newenvelope __P((ENVELOPE *, ENVELOPE *)); 875 extern void dropenvelope __P((ENVELOPE *)); 876 extern void clearenvelope __P((ENVELOPE *, int)); 877 extern char *username __P(()); 878 extern MCI *mci_get __P((char *, MAILER *)); 879 extern char *pintvl __P((time_t, int)); 880 extern char *map_rewrite __P((MAP *, char *, int, char **)); 881 extern ADDRESS *getctladdr __P((ADDRESS *)); 882 extern char *anynet_ntoa __P((SOCKADDR *)); 883 extern char *remotename __P((char *, MAILER *, int, int *, ENVELOPE *)); 884 extern bool shouldqueue __P((long, time_t)); 885 extern bool lockfile __P((int, char *, int)); 886 extern char *hostsignature __P((MAILER *, char *, ENVELOPE *)); 887 extern void openxscript __P((ENVELOPE *)); 888 extern void closexscript __P((ENVELOPE *)); 889 890 /* ellipsis is a different case though */ 891 #ifdef __STDC__ 892 extern void auth_warning(ENVELOPE *, const char *, ...); 893 extern void syserr(const char *, ...); 894 extern void usrerr(const char *, ...); 895 extern void message(const char *, ...); 896 extern void nmessage(const char *, ...); 897 #else 898 extern void auth_warning(); 899 extern void syserr(); 900 extern void usrerr(); 901 extern void message(); 902 extern void nmessage(); 903 #endif 904