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 8.34 (Berkeley) 12/11/93 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 8.34 12/11/93"; 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 NETUNIX 46 # include <sys/un.h> 47 # endif 48 # ifdef NETINET 49 # include <netinet/in.h> 50 # endif 51 # ifdef NETISO 52 # include <netiso/iso.h> 53 # endif 54 # ifdef NETNS 55 # include <netns/ns.h> 56 # endif 57 # ifdef NETX25 58 # include <netccitt/x25.h> 59 # endif 60 61 62 63 64 /* 65 ** Data structure for bit maps. 66 ** 67 ** Each bit in this map can be referenced by an ascii character. 68 ** This is 128 possible bits, or 12 8-bit bytes. 69 */ 70 71 #define BITMAPBYTES 16 /* number of bytes in a bit map */ 72 #define BYTEBITS 8 /* number of bits in a byte */ 73 74 /* internal macros */ 75 #define _BITWORD(bit) (bit / (BYTEBITS * sizeof (int))) 76 #define _BITBIT(bit) (1 << (bit % (BYTEBITS * sizeof (int)))) 77 78 typedef int BITMAP[BITMAPBYTES / sizeof (int)]; 79 80 /* test bit number N */ 81 #define bitnset(bit, map) ((map)[_BITWORD(bit)] & _BITBIT(bit)) 82 83 /* set bit number N */ 84 #define setbitn(bit, map) (map)[_BITWORD(bit)] |= _BITBIT(bit) 85 86 /* clear bit number N */ 87 #define clrbitn(bit, map) (map)[_BITWORD(bit)] &= ~_BITBIT(bit) 88 89 /* clear an entire bit map */ 90 #define clrbitmap(map) bzero((char *) map, BITMAPBYTES) 91 /* 92 ** Address structure. 93 ** Addresses are stored internally in this structure. 94 */ 95 96 struct address 97 { 98 char *q_paddr; /* the printname for the address */ 99 char *q_user; /* user name */ 100 char *q_ruser; /* real user name, or NULL if q_user */ 101 char *q_host; /* host name */ 102 struct mailer *q_mailer; /* mailer to use */ 103 u_short q_flags; /* status flags, see below */ 104 uid_t q_uid; /* user-id of receiver (if known) */ 105 gid_t q_gid; /* group-id of receiver (if known) */ 106 char *q_home; /* home dir (local mailer only) */ 107 char *q_fullname; /* full name if known */ 108 struct address *q_next; /* chain */ 109 struct address *q_alias; /* address this results from */ 110 char *q_owner; /* owner of q_alias */ 111 struct address *q_tchain; /* temporary use chain */ 112 time_t q_timeout; /* timeout for this address */ 113 }; 114 115 typedef struct address ADDRESS; 116 117 # define QDONTSEND 000001 /* don't send to this address */ 118 # define QBADADDR 000002 /* this address is verified bad */ 119 # define QGOODUID 000004 /* the q_uid q_gid fields are good */ 120 # define QPRIMARY 000010 /* set from argv */ 121 # define QQUEUEUP 000020 /* queue for later transmission */ 122 # define QSENT 000040 /* has been successfully delivered */ 123 # define QNOTREMOTE 000100 /* not an address for remote forwarding */ 124 # define QSELFREF 000200 /* this address references itself */ 125 # define QVERIFIED 000400 /* verified, but not expanded */ 126 # define QREPORT 001000 /* report this address in return message */ 127 128 # define NULLADDR ((ADDRESS *) NULL) 129 /* 130 ** Mailer definition structure. 131 ** Every mailer known to the system is declared in this 132 ** structure. It defines the pathname of the mailer, some 133 ** flags associated with it, and the argument vector to 134 ** pass to it. The flags are defined in conf.c 135 ** 136 ** The argument vector is expanded before actual use. All 137 ** words except the first are passed through the macro 138 ** processor. 139 */ 140 141 struct mailer 142 { 143 char *m_name; /* symbolic name of this mailer */ 144 char *m_mailer; /* pathname of the mailer to use */ 145 BITMAP m_flags; /* status flags, see below */ 146 short m_mno; /* mailer number internally */ 147 char **m_argv; /* template argument vector */ 148 short m_sh_rwset; /* rewrite set: sender header addresses */ 149 short m_se_rwset; /* rewrite set: sender envelope addresses */ 150 short m_rh_rwset; /* rewrite set: recipient header addresses */ 151 short m_re_rwset; /* rewrite set: recipient envelope addresses */ 152 char *m_eol; /* end of line string */ 153 long m_maxsize; /* size limit on message to this mailer */ 154 int m_linelimit; /* max # characters per line */ 155 char *m_execdir; /* directory to chdir to before execv */ 156 }; 157 158 typedef struct mailer MAILER; 159 160 /* bits for m_flags */ 161 # define M_ESMTP 'a' /* run Extended SMTP protocol */ 162 # define M_BLANKEND 'b' /* ensure blank line at end of message */ 163 # define M_NOCOMMENT 'c' /* don't include comment part of address */ 164 # define M_CANONICAL 'C' /* make addresses canonical "u@dom" */ 165 /* 'D' /* CF: include Date: */ 166 # define M_EXPENSIVE 'e' /* it costs to use this mailer.... */ 167 # define M_ESCFROM 'E' /* escape From lines to >From */ 168 # define M_FOPT 'f' /* mailer takes picky -f flag */ 169 /* 'F' /* CF: include From: or Resent-From: */ 170 # define M_NO_NULL_FROM 'g' /* sender of errors should be $g */ 171 # define M_HST_UPPER 'h' /* preserve host case distinction */ 172 # define M_PREHEAD 'H' /* MAIL11V3: preview headers */ 173 # define M_INTERNAL 'I' /* SMTP to another sendmail site */ 174 # define M_LOCALMAILER 'l' /* delivery is to this host */ 175 # define M_LIMITS 'L' /* must enforce SMTP line limits */ 176 # define M_MUSER 'm' /* can handle multiple users at once */ 177 /* 'M' /* CF: include Message-Id: */ 178 # define M_NHDR 'n' /* don't insert From line */ 179 # define M_MANYSTATUS 'N' /* MAIL11V3: DATA returns multi-status */ 180 # define M_FROMPATH 'p' /* use reverse-path in MAIL FROM: */ 181 /* 'P' /* CF: include Return-Path: */ 182 # define M_ROPT 'r' /* mailer takes picky -r flag */ 183 # define M_SECURE_PORT 'R' /* try to send on a reserved TCP port */ 184 # define M_STRIPQ 's' /* strip quote chars from user/host */ 185 # define M_RESTR 'S' /* must be daemon to execute */ 186 # define M_USR_UPPER 'u' /* preserve user case distinction */ 187 # define M_UGLYUUCP 'U' /* this wants an ugly UUCP from line */ 188 /* 'V' /* UIUC: !-relativize all addresses */ 189 /* 'x' /* CF: include Full-Name: */ 190 # define M_XDOT 'X' /* use hidden-dot algorithm */ 191 # define M_7BITS '7' /* use 7-bit path */ 192 193 EXTERN MAILER *Mailer[MAXMAILERS+1]; 194 195 EXTERN MAILER *LocalMailer; /* ptr to local mailer */ 196 EXTERN MAILER *ProgMailer; /* ptr to program mailer */ 197 EXTERN MAILER *FileMailer; /* ptr to *file* mailer */ 198 EXTERN MAILER *InclMailer; /* ptr to *include* mailer */ 199 /* 200 ** Header structure. 201 ** This structure is used internally to store header items. 202 */ 203 204 struct header 205 { 206 char *h_field; /* the name of the field */ 207 char *h_value; /* the value of that field */ 208 struct header *h_link; /* the next header */ 209 u_short h_flags; /* status bits, see below */ 210 BITMAP h_mflags; /* m_flags bits needed */ 211 }; 212 213 typedef struct header HDR; 214 215 /* 216 ** Header information structure. 217 ** Defined in conf.c, this struct declares the header fields 218 ** that have some magic meaning. 219 */ 220 221 struct hdrinfo 222 { 223 char *hi_field; /* the name of the field */ 224 u_short hi_flags; /* status bits, see below */ 225 }; 226 227 extern struct hdrinfo HdrInfo[]; 228 229 /* bits for h_flags and hi_flags */ 230 # define H_EOH 00001 /* this field terminates header */ 231 # define H_RCPT 00002 /* contains recipient addresses */ 232 # define H_DEFAULT 00004 /* if another value is found, drop this */ 233 # define H_RESENT 00010 /* this address is a "Resent-..." address */ 234 # define H_CHECK 00020 /* check h_mflags against m_flags */ 235 # define H_ACHECK 00040 /* ditto, but always (not just default) */ 236 # define H_FORCE 00100 /* force this field, even if default */ 237 # define H_TRACE 00200 /* this field contains trace information */ 238 # define H_FROM 00400 /* this is a from-type field */ 239 # define H_VALID 01000 /* this field has a validated value */ 240 # define H_RECEIPTTO 02000 /* this field has return receipt info */ 241 # define H_ERRORSTO 04000 /* this field has error address info */ 242 /* 243 ** Envelope structure. 244 ** This structure defines the message itself. There is usually 245 ** only one of these -- for the message that we originally read 246 ** and which is our primary interest -- but other envelopes can 247 ** be generated during processing. For example, error messages 248 ** will have their own envelope. 249 */ 250 251 # define ENVELOPE struct envelope 252 253 ENVELOPE 254 { 255 HDR *e_header; /* head of header list */ 256 long e_msgpriority; /* adjusted priority of this message */ 257 time_t e_ctime; /* time message appeared in the queue */ 258 char *e_to; /* the target person */ 259 char *e_receiptto; /* return receipt address */ 260 ADDRESS e_from; /* the person it is from */ 261 char *e_sender; /* e_from.q_paddr w comments stripped */ 262 char **e_fromdomain; /* the domain part of the sender */ 263 ADDRESS *e_sendqueue; /* list of message recipients */ 264 ADDRESS *e_errorqueue; /* the queue for error responses */ 265 long e_msgsize; /* size of the message in bytes */ 266 long e_flags; /* flags, see below */ 267 int e_nrcpts; /* number of recipients */ 268 short e_class; /* msg class (priority, junk, etc.) */ 269 short e_hopcount; /* number of times processed */ 270 short e_nsent; /* number of sends since checkpoint */ 271 short e_sendmode; /* message send mode */ 272 short e_errormode; /* error return mode */ 273 int (*e_puthdr)__P((FILE *, MAILER *, ENVELOPE *)); 274 /* function to put header of message */ 275 int (*e_putbody)__P((FILE *, MAILER *, ENVELOPE *, char *)); 276 /* function to put body of message */ 277 struct envelope *e_parent; /* the message this one encloses */ 278 struct envelope *e_sibling; /* the next envelope of interest */ 279 char *e_bodytype; /* type of message body */ 280 char *e_df; /* location of temp file */ 281 FILE *e_dfp; /* temporary file */ 282 char *e_id; /* code for this entry in queue */ 283 FILE *e_xfp; /* transcript file */ 284 FILE *e_lockfp; /* the lock file for this message */ 285 char *e_message; /* error message */ 286 char *e_statmsg; /* stat msg (changes per delivery) */ 287 char *e_msgboundary; /* MIME-style message part boundary */ 288 char *e_origrcpt; /* original recipient (one only) */ 289 char *e_macro[128]; /* macro definitions */ 290 }; 291 292 /* values for e_flags */ 293 #define EF_OLDSTYLE 0x0000001 /* use spaces (not commas) in hdrs */ 294 #define EF_INQUEUE 0x0000002 /* this message is fully queued */ 295 #define EF_CLRQUEUE 0x0000008 /* disk copy is no longer needed */ 296 #define EF_SENDRECEIPT 0x0000010 /* send a return receipt */ 297 #define EF_FATALERRS 0x0000020 /* fatal errors occured */ 298 #define EF_KEEPQUEUE 0x0000040 /* keep queue files always */ 299 #define EF_RESPONSE 0x0000080 /* this is an error or return receipt */ 300 #define EF_RESENT 0x0000100 /* this message is being forwarded */ 301 #define EF_VRFYONLY 0x0000200 /* verify only (don't expand aliases) */ 302 #define EF_WARNING 0x0000400 /* warning message has been sent */ 303 #define EF_QUEUERUN 0x0000800 /* this envelope is from queue */ 304 #define EF_GLOBALERRS 0x0001000 /* treat errors as global */ 305 #define EF_PM_NOTIFY 0x0002000 /* send return mail to postmaster */ 306 #define EF_METOO 0x0004000 /* send to me too */ 307 #define EF_LOGSENDER 0x0008000 /* need to log the sender */ 308 309 EXTERN ENVELOPE *CurEnv; /* envelope currently being processed */ 310 /* 311 ** Message priority classes. 312 ** 313 ** The message class is read directly from the Priority: header 314 ** field in the message. 315 ** 316 ** CurEnv->e_msgpriority is the number of bytes in the message plus 317 ** the creation time (so that jobs ``tend'' to be ordered correctly), 318 ** adjusted by the message class, the number of recipients, and the 319 ** amount of time the message has been sitting around. This number 320 ** is used to order the queue. Higher values mean LOWER priority. 321 ** 322 ** Each priority class point is worth WkClassFact priority points; 323 ** each recipient is worth WkRecipFact priority points. Each time 324 ** we reprocess a message the priority is adjusted by WkTimeFact. 325 ** WkTimeFact should normally decrease the priority so that jobs 326 ** that have historically failed will be run later; thanks go to 327 ** Jay Lepreau at Utah for pointing out the error in my thinking. 328 ** 329 ** The "class" is this number, unadjusted by the age or size of 330 ** this message. Classes with negative representations will have 331 ** error messages thrown away if they are not local. 332 */ 333 334 struct priority 335 { 336 char *pri_name; /* external name of priority */ 337 int pri_val; /* internal value for same */ 338 }; 339 340 EXTERN struct priority Priorities[MAXPRIORITIES]; 341 EXTERN int NumPriorities; /* pointer into Priorities */ 342 /* 343 ** Rewrite rules. 344 */ 345 346 struct rewrite 347 { 348 char **r_lhs; /* pattern match */ 349 char **r_rhs; /* substitution value */ 350 struct rewrite *r_next;/* next in chain */ 351 }; 352 353 EXTERN struct rewrite *RewriteRules[MAXRWSETS]; 354 355 /* 356 ** Special characters in rewriting rules. 357 ** These are used internally only. 358 ** The COND* rules are actually used in macros rather than in 359 ** rewriting rules, but are given here because they 360 ** cannot conflict. 361 */ 362 363 /* left hand side items */ 364 # define MATCHZANY 0220 /* match zero or more tokens */ 365 # define MATCHANY 0221 /* match one or more tokens */ 366 # define MATCHONE 0222 /* match exactly one token */ 367 # define MATCHCLASS 0223 /* match one token in a class */ 368 # define MATCHNCLASS 0224 /* match anything not in class */ 369 # define MATCHREPL 0225 /* replacement on RHS for above */ 370 371 /* right hand side items */ 372 # define CANONNET 0226 /* canonical net, next token */ 373 # define CANONHOST 0227 /* canonical host, next token */ 374 # define CANONUSER 0230 /* canonical user, next N tokens */ 375 # define CALLSUBR 0231 /* call another rewriting set */ 376 377 /* conditionals in macros */ 378 # define CONDIF 0232 /* conditional if-then */ 379 # define CONDELSE 0233 /* conditional else */ 380 # define CONDFI 0234 /* conditional fi */ 381 382 /* bracket characters for host name lookup */ 383 # define HOSTBEGIN 0235 /* hostname lookup begin */ 384 # define HOSTEND 0236 /* hostname lookup end */ 385 386 /* bracket characters for generalized lookup */ 387 # define LOOKUPBEGIN 0205 /* generalized lookup begin */ 388 # define LOOKUPEND 0206 /* generalized lookup end */ 389 390 /* macro substitution character */ 391 # define MACROEXPAND 0201 /* macro expansion */ 392 # define MACRODEXPAND 0202 /* deferred macro expansion */ 393 394 /* to make the code clearer */ 395 # define MATCHZERO CANONHOST 396 397 /* external <==> internal mapping table */ 398 struct metamac 399 { 400 char metaname; /* external code (after $) */ 401 u_char metaval; /* internal code (as above) */ 402 }; 403 /* 404 ** Information about currently open connections to mailers, or to 405 ** hosts that we have looked up recently. 406 */ 407 408 # define MCI struct mailer_con_info 409 410 MCI 411 { 412 short mci_flags; /* flag bits, see below */ 413 short mci_errno; /* error number on last connection */ 414 short mci_herrno; /* h_errno from last DNS lookup */ 415 short mci_exitstat; /* exit status from last connection */ 416 short mci_state; /* SMTP state */ 417 long mci_maxsize; /* max size this server will accept */ 418 FILE *mci_in; /* input side of connection */ 419 FILE *mci_out; /* output side of connection */ 420 int mci_pid; /* process id of subordinate proc */ 421 char *mci_phase; /* SMTP phase string */ 422 struct mailer *mci_mailer; /* ptr to the mailer for this conn */ 423 char *mci_host; /* host name */ 424 time_t mci_lastuse; /* last usage time */ 425 }; 426 427 428 /* flag bits */ 429 #define MCIF_VALID 000001 /* this entry is valid */ 430 #define MCIF_TEMP 000002 /* don't cache this connection */ 431 #define MCIF_CACHED 000004 /* currently in open cache */ 432 #define MCIF_ESMTP 000010 /* this host speaks ESMTP */ 433 #define MCIF_EXPN 000020 /* EXPN command supported */ 434 #define MCIF_SIZE 000040 /* SIZE option supported */ 435 #define MCIF_8BITMIME 000100 /* BODY=8BITMIME supported */ 436 #define MCIF_MULTSTAT 000200 /* MAIL11V3: handles MULT status */ 437 438 /* states */ 439 #define MCIS_CLOSED 0 /* no traffic on this connection */ 440 #define MCIS_OPENING 1 /* sending initial protocol */ 441 #define MCIS_OPEN 2 /* open, initial protocol sent */ 442 #define MCIS_ACTIVE 3 /* message being sent */ 443 #define MCIS_QUITING 4 /* running quit protocol */ 444 #define MCIS_SSD 5 /* service shutting down */ 445 #define MCIS_ERROR 6 /* I/O error on connection */ 446 /* 447 ** Name canonification short circuit. 448 ** 449 ** If the name server for a host is down, the process of trying to 450 ** canonify the name can hang. This is similar to (but alas, not 451 ** identical to) looking up the name for delivery. This stab type 452 ** caches the result of the name server lookup so we don't hang 453 ** multiple times. 454 */ 455 456 #define NAMECANON struct _namecanon 457 458 NAMECANON 459 { 460 short nc_errno; /* cached errno */ 461 short nc_herrno; /* cached h_errno */ 462 short nc_stat; /* cached exit status code */ 463 short nc_flags; /* flag bits */ 464 char *nc_cname; /* the canonical name */ 465 }; 466 467 /* values for nc_flags */ 468 #define NCF_VALID 0x0001 /* entry valid */ 469 /* 470 ** Mapping functions 471 ** 472 ** These allow arbitrary mappings in the config file. The idea 473 ** (albeit not the implementation) comes from IDA sendmail. 474 */ 475 476 # define MAPCLASS struct _mapclass 477 # define MAP struct _map 478 479 480 /* 481 ** An actual map. 482 */ 483 484 MAP 485 { 486 MAPCLASS *map_class; /* the class of this map */ 487 char *map_mname; /* name of this map */ 488 int map_mflags; /* flags, see below */ 489 char *map_file; /* the (nominal) filename */ 490 ARBPTR_T map_db1; /* the open database ptr */ 491 ARBPTR_T map_db2; /* an "extra" database pointer */ 492 char *map_app; /* to append to successful matches */ 493 char *map_domain; /* the (nominal) NIS domain */ 494 char *map_rebuild; /* program to run to do auto-rebuild */ 495 time_t map_mtime; /* last database modification time */ 496 }; 497 498 /* bit values for map_flags */ 499 # define MF_VALID 0x0001 /* this entry is valid */ 500 # define MF_INCLNULL 0x0002 /* include null byte in key */ 501 # define MF_OPTIONAL 0x0004 /* don't complain if map not found */ 502 # define MF_NOFOLDCASE 0x0008 /* don't fold case in keys */ 503 # define MF_MATCHONLY 0x0010 /* don't use the map value */ 504 # define MF_OPEN 0x0020 /* this entry is open */ 505 # define MF_WRITABLE 0x0040 /* open for writing */ 506 # define MF_ALIAS 0x0080 /* this is an alias file */ 507 # define MF_TRY0NULL 0x0100 /* try with no null byte */ 508 # define MF_TRY1NULL 0x0200 /* try with the null byte */ 509 # define MF_LOCKED 0x0400 /* this map is currently locked */ 510 # define MF_ALIASWAIT 0x0800 /* alias map in aliaswait state */ 511 # define MF_IMPL_HASH 0x1000 /* implicit: underlying hash database */ 512 # define MF_IMPL_NDBM 0x2000 /* implicit: underlying NDBM database */ 513 514 515 /* 516 ** The class of a map -- essentially the functions to call 517 */ 518 519 MAPCLASS 520 { 521 char *map_cname; /* name of this map class */ 522 char *map_ext; /* extension for database file */ 523 short map_cflags; /* flag bits, see below */ 524 bool (*map_parse)__P((MAP *, char *)); 525 /* argument parsing function */ 526 char *(*map_lookup)__P((MAP *, char *, char **, int *)); 527 /* lookup function */ 528 void (*map_store)__P((MAP *, char *, char *)); 529 /* store function */ 530 bool (*map_open)__P((MAP *, int)); 531 /* open function */ 532 void (*map_close)__P((MAP *)); 533 /* close function */ 534 }; 535 536 /* bit values for map_cflags */ 537 #define MCF_ALIASOK 0x0001 /* can be used for aliases */ 538 #define MCF_ALIASONLY 0x0002 /* usable only for aliases */ 539 #define MCF_REBUILDABLE 0x0004 /* can rebuild alias files */ 540 /* 541 ** Symbol table definitions 542 */ 543 544 struct symtab 545 { 546 char *s_name; /* name to be entered */ 547 char s_type; /* general type (see below) */ 548 struct symtab *s_next; /* pointer to next in chain */ 549 union 550 { 551 BITMAP sv_class; /* bit-map of word classes */ 552 ADDRESS *sv_addr; /* pointer to address header */ 553 MAILER *sv_mailer; /* pointer to mailer */ 554 char *sv_alias; /* alias */ 555 MAPCLASS sv_mapclass; /* mapping function class */ 556 MAP sv_map; /* mapping function */ 557 char *sv_hostsig; /* host signature */ 558 MCI sv_mci; /* mailer connection info */ 559 NAMECANON sv_namecanon; /* canonical name cache */ 560 } s_value; 561 }; 562 563 typedef struct symtab STAB; 564 565 /* symbol types */ 566 # define ST_UNDEF 0 /* undefined type */ 567 # define ST_CLASS 1 /* class map */ 568 # define ST_ADDRESS 2 /* an address in parsed format */ 569 # define ST_MAILER 3 /* a mailer header */ 570 # define ST_ALIAS 4 /* an alias */ 571 # define ST_MAPCLASS 5 /* mapping function class */ 572 # define ST_MAP 6 /* mapping function */ 573 # define ST_HOSTSIG 7 /* host signature */ 574 # define ST_NAMECANON 8 /* cached canonical name */ 575 # define ST_MCI 16 /* mailer connection info (offset) */ 576 577 # define s_class s_value.sv_class 578 # define s_address s_value.sv_addr 579 # define s_mailer s_value.sv_mailer 580 # define s_alias s_value.sv_alias 581 # define s_mci s_value.sv_mci 582 # define s_mapclass s_value.sv_mapclass 583 # define s_hostsig s_value.sv_hostsig 584 # define s_map s_value.sv_map 585 # define s_namecanon s_value.sv_namecanon 586 587 extern STAB *stab __P((char *, int, int)); 588 extern void stabapply __P((void (*)(STAB *, int), int)); 589 590 /* opcodes to stab */ 591 # define ST_FIND 0 /* find entry */ 592 # define ST_ENTER 1 /* enter if not there */ 593 /* 594 ** STRUCT EVENT -- event queue. 595 ** 596 ** Maintained in sorted order. 597 ** 598 ** We store the pid of the process that set this event to insure 599 ** that when we fork we will not take events intended for the parent. 600 */ 601 602 struct event 603 { 604 time_t ev_time; /* time of the function call */ 605 int (*ev_func)__P((int)); 606 /* function to call */ 607 int ev_arg; /* argument to ev_func */ 608 int ev_pid; /* pid that set this event */ 609 struct event *ev_link; /* link to next item */ 610 }; 611 612 typedef struct event EVENT; 613 614 EXTERN EVENT *EventQueue; /* head of event queue */ 615 /* 616 ** Operation, send, and error modes 617 ** 618 ** The operation mode describes the basic operation of sendmail. 619 ** This can be set from the command line, and is "send mail" by 620 ** default. 621 ** 622 ** The send mode tells how to send mail. It can be set in the 623 ** configuration file. It's setting determines how quickly the 624 ** mail will be delivered versus the load on your system. If the 625 ** -v (verbose) flag is given, it will be forced to SM_DELIVER 626 ** mode. 627 ** 628 ** The error mode tells how to return errors. 629 */ 630 631 EXTERN char OpMode; /* operation mode, see below */ 632 633 #define MD_DELIVER 'm' /* be a mail sender */ 634 #define MD_SMTP 's' /* run SMTP on standard input */ 635 #define MD_DAEMON 'd' /* run as a daemon */ 636 #define MD_VERIFY 'v' /* verify: don't collect or deliver */ 637 #define MD_TEST 't' /* test mode: resolve addrs only */ 638 #define MD_INITALIAS 'i' /* initialize alias database */ 639 #define MD_PRINT 'p' /* print the queue */ 640 #define MD_FREEZE 'z' /* freeze the configuration file */ 641 642 643 /* values for e_sendmode -- send modes */ 644 #define SM_DELIVER 'i' /* interactive delivery */ 645 #define SM_QUICKD 'j' /* deliver w/o queueing */ 646 #define SM_FORK 'b' /* deliver in background */ 647 #define SM_QUEUE 'q' /* queue, don't deliver */ 648 #define SM_VERIFY 'v' /* verify only (used internally) */ 649 650 /* used only as a parameter to sendall */ 651 #define SM_DEFAULT '\0' /* unspecified, use SendMode */ 652 653 654 /* values for e_errormode -- error handling modes */ 655 #define EM_PRINT 'p' /* print errors */ 656 #define EM_MAIL 'm' /* mail back errors */ 657 #define EM_WRITE 'w' /* write back errors */ 658 #define EM_BERKNET 'e' /* special berknet processing */ 659 #define EM_QUIET 'q' /* don't print messages (stat only) */ 660 /* 661 ** Additional definitions 662 */ 663 664 665 /* 666 ** Privacy flags 667 ** These are bit values for the PrivacyFlags word. 668 */ 669 670 #define PRIV_PUBLIC 0 /* what have I got to hide? */ 671 #define PRIV_NEEDMAILHELO 00001 /* insist on HELO for MAIL, at least */ 672 #define PRIV_NEEDEXPNHELO 00002 /* insist on HELO for EXPN */ 673 #define PRIV_NEEDVRFYHELO 00004 /* insist on HELO for VRFY */ 674 #define PRIV_NOEXPN 00010 /* disallow EXPN command entirely */ 675 #define PRIV_NOVRFY 00020 /* disallow VRFY command entirely */ 676 #define PRIV_AUTHWARNINGS 00040 /* flag possible authorization probs */ 677 #define PRIV_RESTRICTMAILQ 01000 /* restrict mailq command */ 678 #define PRIV_RESTRICTQRUN 02000 /* restrict queue run */ 679 #define PRIV_GOAWAY 00777 /* don't give no info, anyway, anyhow */ 680 681 /* struct defining such things */ 682 struct prival 683 { 684 char *pv_name; /* name of privacy flag */ 685 int pv_flag; /* numeric level */ 686 }; 687 688 689 /* 690 ** Flags passed to remotename, parseaddr, allocaddr, and buildaddr. 691 */ 692 693 #define RF_SENDERADDR 0001 /* this is a sender address */ 694 #define RF_HEADERADDR 0002 /* this is a header address */ 695 #define RF_CANONICAL 0004 /* strip comment information */ 696 #define RF_ADDDOMAIN 0010 /* OK to do domain extension */ 697 #define RF_COPYPARSE 0020 /* copy parsed user & host */ 698 #define RF_COPYPADDR 0040 /* copy print address */ 699 #define RF_COPYALL (RF_COPYPARSE|RF_COPYPADDR) 700 #define RF_COPYNONE 0 701 702 703 /* 704 ** Flags passed to safefile. 705 */ 706 707 #define SFF_ANYFILE 0 /* no special restrictions */ 708 #define SFF_MUSTOWN 0x0001 /* user must own this file */ 709 #define SFF_NOSLINK 0x0002 /* file cannot be a symbolic link */ 710 711 712 /* 713 ** Regular UNIX sockaddrs are too small to handle ISO addresses, so 714 ** we are forced to declare a supertype here. 715 */ 716 717 union bigsockaddr 718 { 719 struct sockaddr sa; /* general version */ 720 #ifdef NETUNIX 721 struct sockaddr_un sunix; /* UNIX family */ 722 #endif 723 #ifdef NETINET 724 struct sockaddr_in sin; /* INET family */ 725 #endif 726 #ifdef NETISO 727 struct sockaddr_iso siso; /* ISO family */ 728 #endif 729 #ifdef NETNS 730 struct sockaddr_ns sns; /* XNS family */ 731 #endif 732 #ifdef NETX25 733 struct sockaddr_x25 sx25; /* X.25 family */ 734 #endif 735 }; 736 737 #define SOCKADDR union bigsockaddr 738 /* 739 ** Global variables. 740 */ 741 742 EXTERN bool FromFlag; /* if set, "From" person is explicit */ 743 EXTERN bool MeToo; /* send to the sender also */ 744 EXTERN bool IgnrDot; /* don't let dot end messages */ 745 EXTERN bool SaveFrom; /* save leading "From" lines */ 746 EXTERN bool Verbose; /* set if blow-by-blow desired */ 747 EXTERN bool GrabTo; /* if set, get recipients from msg */ 748 EXTERN bool NoReturn; /* don't return letter to sender */ 749 EXTERN bool SuprErrs; /* set if we are suppressing errors */ 750 EXTERN bool HoldErrs; /* only output errors to transcript */ 751 EXTERN bool NoConnect; /* don't connect to non-local mailers */ 752 EXTERN bool SuperSafe; /* be extra careful, even if expensive */ 753 EXTERN bool ForkQueueRuns; /* fork for each job when running the queue */ 754 EXTERN bool AutoRebuild; /* auto-rebuild the alias database as needed */ 755 EXTERN bool CheckAliases; /* parse addresses during newaliases */ 756 EXTERN bool NoAlias; /* suppress aliasing */ 757 EXTERN bool UseNameServer; /* use internet domain name server */ 758 EXTERN bool SevenBit; /* force 7-bit data */ 759 EXTERN time_t SafeAlias; /* interval to wait until @:@ in alias file */ 760 EXTERN FILE *InChannel; /* input connection */ 761 EXTERN FILE *OutChannel; /* output connection */ 762 EXTERN uid_t RealUid; /* when Daemon, real uid of caller */ 763 EXTERN gid_t RealGid; /* when Daemon, real gid of caller */ 764 EXTERN uid_t DefUid; /* default uid to run as */ 765 EXTERN gid_t DefGid; /* default gid to run as */ 766 EXTERN char *DefUser; /* default user to run as (from DefUid) */ 767 EXTERN int OldUmask; /* umask when sendmail starts up */ 768 EXTERN int Errors; /* set if errors (local to single pass) */ 769 EXTERN int ExitStat; /* exit status code */ 770 EXTERN int AliasLevel; /* depth of aliasing */ 771 EXTERN int LineNumber; /* line number in current input */ 772 EXTERN int LogLevel; /* level of logging to perform */ 773 EXTERN int FileMode; /* mode on files */ 774 EXTERN int QueueLA; /* load average starting forced queueing */ 775 EXTERN int RefuseLA; /* load average refusing connections are */ 776 EXTERN int CurrentLA; /* current load average */ 777 EXTERN long QueueFactor; /* slope of queue function */ 778 EXTERN time_t QueueIntvl; /* intervals between running the queue */ 779 EXTERN char *HelpFile; /* location of SMTP help file */ 780 EXTERN char *ErrMsgFile; /* file to prepend to all error messages */ 781 EXTERN char *StatFile; /* location of statistics summary */ 782 EXTERN char *QueueDir; /* location of queue directory */ 783 EXTERN char *FileName; /* name to print on error messages */ 784 EXTERN char *SmtpPhase; /* current phase in SMTP processing */ 785 EXTERN char *MyHostName; /* name of this host for SMTP messages */ 786 EXTERN char *RealHostName; /* name of host we are talking to */ 787 EXTERN SOCKADDR RealHostAddr; /* address of host we are talking to */ 788 EXTERN char *CurHostName; /* current host we are dealing with */ 789 EXTERN jmp_buf TopFrame; /* branch-to-top-of-loop-on-error frame */ 790 EXTERN bool QuickAbort; /* .... but only if we want a quick abort */ 791 EXTERN bool LogUsrErrs; /* syslog user errors (e.g., SMTP RCPT cmd) */ 792 EXTERN bool SendMIMEErrors; /* send error messages in MIME format */ 793 EXTERN bool MatchGecos; /* look for user names in gecos field */ 794 EXTERN bool UseErrorsTo; /* use Errors-To: header (back compat) */ 795 EXTERN bool TryNullMXList; /* if we are the best MX, try host directly */ 796 extern bool CheckLoopBack; /* check for loopback on HELO packet */ 797 EXTERN bool InChild; /* true if running in an SMTP subprocess */ 798 EXTERN char SpaceSub; /* substitution for <lwsp> */ 799 EXTERN int PrivacyFlags; /* privacy flags */ 800 EXTERN char *ConfFile; /* location of configuration file [conf.c] */ 801 extern char *PidFile; /* location of proc id file [conf.c] */ 802 extern ADDRESS NullAddress; /* a null (template) address [main.c] */ 803 EXTERN long WkClassFact; /* multiplier for message class -> priority */ 804 EXTERN long WkRecipFact; /* multiplier for # of recipients -> priority */ 805 EXTERN long WkTimeFact; /* priority offset each time this job is run */ 806 EXTERN char *UdbSpec; /* user database source spec */ 807 EXTERN int MaxHopCount; /* max # of hops until bounce */ 808 EXTERN int ConfigLevel; /* config file level */ 809 EXTERN char *TimeZoneSpec; /* override time zone specification */ 810 EXTERN char *ForwardPath; /* path to search for .forward files */ 811 EXTERN long MinBlocksFree; /* min # of blocks free on queue fs */ 812 EXTERN char *FallBackMX; /* fall back MX host */ 813 EXTERN long MaxMessageSize; /* advertised max size we will accept */ 814 EXTERN char *PostMasterCopy; /* address to get errs cc's */ 815 EXTERN int CheckpointInterval; /* queue file checkpoint interval */ 816 EXTERN bool DontPruneRoutes; /* don't prune source routes */ 817 extern bool BrokenSmtpPeers; /* peers can't handle 2-line greeting */ 818 EXTERN int MaxMciCache; /* maximum entries in MCI cache */ 819 EXTERN time_t MciCacheTimeout; /* maximum idle time on connections */ 820 EXTERN char *QueueLimitRecipient; /* limit queue runs to this recipient */ 821 EXTERN char *QueueLimitSender; /* limit queue runs to this sender */ 822 EXTERN char *QueueLimitId; /* limit queue runs to this id */ 823 EXTERN FILE *TrafficLogFile; /* file in which to log all traffic */ 824 extern int errno; 825 826 827 /* 828 ** Timeouts 829 ** 830 ** Indicated values are the MINIMUM per RFC 1123 section 5.3.2. 831 */ 832 833 EXTERN struct 834 { 835 /* RFC 1123-specified timeouts [minimum value] */ 836 time_t to_initial; /* initial greeting timeout [5m] */ 837 time_t to_mail; /* MAIL command [5m] */ 838 time_t to_rcpt; /* RCPT command [5m] */ 839 time_t to_datainit; /* DATA initiation [2m] */ 840 time_t to_datablock; /* DATA block [3m] */ 841 time_t to_datafinal; /* DATA completion [10m] */ 842 time_t to_nextcommand; /* next command [5m] */ 843 /* following timeouts are not mentioned in RFC 1123 */ 844 time_t to_rset; /* RSET command */ 845 time_t to_helo; /* HELO command */ 846 time_t to_quit; /* QUIT command */ 847 time_t to_miscshort; /* misc short commands (NOOP, VERB, etc) */ 848 time_t to_ident; /* IDENT protocol requests */ 849 /* following are per message */ 850 time_t to_q_return; /* queue return timeout */ 851 time_t to_q_warning; /* queue warning timeout */ 852 } TimeOuts; 853 854 855 /* 856 ** Trace information 857 */ 858 859 /* trace vector and macros for debugging flags */ 860 EXTERN u_char tTdvect[100]; 861 # define tTd(flag, level) (tTdvect[flag] >= level) 862 # define tTdlevel(flag) (tTdvect[flag]) 863 /* 864 ** Miscellaneous information. 865 */ 866 867 868 869 /* 870 ** Some in-line functions 871 */ 872 873 /* set exit status */ 874 #define setstat(s) { \ 875 if (ExitStat == EX_OK || ExitStat == EX_TEMPFAIL) \ 876 ExitStat = s; \ 877 } 878 879 /* make a copy of a string */ 880 #define newstr(s) strcpy(xalloc(strlen(s) + 1), s) 881 882 #define STRUCTCOPY(s, d) d = s 883 884 885 /* 886 ** Declarations of useful functions 887 */ 888 889 extern ADDRESS *parseaddr __P((char *, ADDRESS *, int, int, char **, ENVELOPE *)); 890 extern char *xalloc __P((int)); 891 extern bool sameaddr __P((ADDRESS *, ADDRESS *)); 892 extern FILE *dfopen __P((char *, int, int)); 893 extern EVENT *setevent __P((time_t, int(*)(), int)); 894 extern char *sfgets __P((char *, int, FILE *, time_t, char *)); 895 extern char *queuename __P((ENVELOPE *, int)); 896 extern time_t curtime __P(()); 897 extern bool transienterror __P((int)); 898 extern const char *errstring __P((int)); 899 extern void expand __P((char *, char *, char *, ENVELOPE *)); 900 extern void define __P((int, char *, ENVELOPE *)); 901 extern char *macvalue __P((int, ENVELOPE *)); 902 extern char **prescan __P((char *, int, char[], int, char **)); 903 extern int rewrite __P((char **, int, int, ENVELOPE *)); 904 extern char *fgetfolded __P((char *, int, FILE *)); 905 extern ADDRESS *recipient __P((ADDRESS *, ADDRESS **, ENVELOPE *)); 906 extern ENVELOPE *newenvelope __P((ENVELOPE *, ENVELOPE *)); 907 extern void dropenvelope __P((ENVELOPE *)); 908 extern void clearenvelope __P((ENVELOPE *, int)); 909 extern char *username __P(()); 910 extern MCI *mci_get __P((char *, MAILER *)); 911 extern char *pintvl __P((time_t, int)); 912 extern char *map_rewrite __P((MAP *, char *, int, char **)); 913 extern ADDRESS *getctladdr __P((ADDRESS *)); 914 extern char *anynet_ntoa __P((SOCKADDR *)); 915 extern char *remotename __P((char *, MAILER *, int, int *, ENVELOPE *)); 916 extern bool shouldqueue __P((long, time_t)); 917 extern bool lockfile __P((int, char *, char *, int)); 918 extern char *hostsignature __P((MAILER *, char *, ENVELOPE *)); 919 extern void openxscript __P((ENVELOPE *)); 920 extern void closexscript __P((ENVELOPE *)); 921 extern sigfunc_t setsignal __P((int, sigfunc_t)); 922 extern char *shortenstring __P((char *, int)); 923 924 /* ellipsis is a different case though */ 925 #ifdef __STDC__ 926 extern void auth_warning(ENVELOPE *, const char *, ...); 927 extern void syserr(const char *, ...); 928 extern void usrerr(const char *, ...); 929 extern void message(const char *, ...); 930 extern void nmessage(const char *, ...); 931 #else 932 extern void auth_warning(); 933 extern void syserr(); 934 extern void usrerr(); 935 extern void message(); 936 extern void nmessage(); 937 #endif 938