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 8.59 (Berkeley) 08/20/94 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 8.59 08/20/94"; 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 256 possible bits, or 32 8-bit bytes. 69 */ 70 71 #define BITMAPBYTES 32 /* 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 0x0001 /* don't send to this address */ 118 # define QBADADDR 0x0002 /* this address is verified bad */ 119 # define QGOODUID 0x0004 /* the q_uid q_gid fields are good */ 120 # define QPRIMARY 0x0008 /* set from argv */ 121 # define QQUEUEUP 0x0010 /* queue for later transmission */ 122 # define QSENT 0x0020 /* has been successfully delivered */ 123 # define QNOTREMOTE 0x0040 /* not an address for remote forwarding */ 124 # define QSELFREF 0x0080 /* this address references itself */ 125 # define QVERIFIED 0x0100 /* verified, but not expanded */ 126 # define QREPORT 0x0200 /* report this address in return message */ 127 # define QBOGUSSHELL 0x0400 /* this entry has an invalid shell listed */ 128 # define QUNSAFEADDR 0x0800 /* address aquired through an unsafe path */ 129 130 # define NULLADDR ((ADDRESS *) NULL) 131 /* 132 ** Mailer definition structure. 133 ** Every mailer known to the system is declared in this 134 ** structure. It defines the pathname of the mailer, some 135 ** flags associated with it, and the argument vector to 136 ** pass to it. The flags are defined in conf.c 137 ** 138 ** The argument vector is expanded before actual use. All 139 ** words except the first are passed through the macro 140 ** processor. 141 */ 142 143 struct mailer 144 { 145 char *m_name; /* symbolic name of this mailer */ 146 char *m_mailer; /* pathname of the mailer to use */ 147 BITMAP m_flags; /* status flags, see below */ 148 short m_mno; /* mailer number internally */ 149 char **m_argv; /* template argument vector */ 150 short m_sh_rwset; /* rewrite set: sender header addresses */ 151 short m_se_rwset; /* rewrite set: sender envelope addresses */ 152 short m_rh_rwset; /* rewrite set: recipient header addresses */ 153 short m_re_rwset; /* rewrite set: recipient envelope addresses */ 154 char *m_eol; /* end of line string */ 155 long m_maxsize; /* size limit on message to this mailer */ 156 int m_linelimit; /* max # characters per line */ 157 char *m_execdir; /* directory to chdir to before execv */ 158 uid_t m_uid; /* UID to run as */ 159 gid_t m_gid; /* GID to run as */ 160 }; 161 162 typedef struct mailer MAILER; 163 164 /* bits for m_flags */ 165 # define M_ESMTP 'a' /* run Extended SMTP protocol */ 166 # define M_ALIASABLE 'A' /* user can be LHS of an alias */ 167 # define M_BLANKEND 'b' /* ensure blank line at end of message */ 168 # define M_NOCOMMENT 'c' /* don't include comment part of address */ 169 # define M_CANONICAL 'C' /* make addresses canonical "u@dom" */ 170 # define M_NOBRACKET 'd' /* never angle bracket envelope route-addrs */ 171 /* 'D' /* CF: include Date: */ 172 # define M_EXPENSIVE 'e' /* it costs to use this mailer.... */ 173 # define M_ESCFROM 'E' /* escape From lines to >From */ 174 # define M_FOPT 'f' /* mailer takes picky -f flag */ 175 /* 'F' /* CF: include From: or Resent-From: */ 176 # define M_NO_NULL_FROM 'g' /* sender of errors should be $g */ 177 # define M_HST_UPPER 'h' /* preserve host case distinction */ 178 # define M_PREHEAD 'H' /* MAIL11V3: preview headers */ 179 # define M_INTERNAL 'I' /* SMTP to another sendmail site */ 180 # define M_NOLOOPCHECK 'k' /* don't check for loops in HELO command */ 181 # define M_LOCALMAILER 'l' /* delivery is to this host */ 182 # define M_LIMITS 'L' /* must enforce SMTP line limits */ 183 # define M_MUSER 'm' /* can handle multiple users at once */ 184 /* 'M' /* CF: include Message-Id: */ 185 # define M_NHDR 'n' /* don't insert From line */ 186 # define M_MANYSTATUS 'N' /* MAIL11V3: DATA returns multi-status */ 187 # define M_RUNASRCPT 'o' /* always run mailer as recipient */ 188 # define M_FROMPATH 'p' /* use reverse-path in MAIL FROM: */ 189 /* 'P' /* CF: include Return-Path: */ 190 # define M_ROPT 'r' /* mailer takes picky -r flag */ 191 # define M_SECURE_PORT 'R' /* try to send on a reserved TCP port */ 192 # define M_STRIPQ 's' /* strip quote chars from user/host */ 193 # define M_SPECIFIC_UID 'S' /* run as specific uid/gid */ 194 # define M_USR_UPPER 'u' /* preserve user case distinction */ 195 # define M_UGLYUUCP 'U' /* this wants an ugly UUCP from line */ 196 /* 'V' /* UIUC: !-relativize all addresses */ 197 # define M_HASPWENT 'w' /* check for /etc/passwd entry */ 198 /* 'x' /* CF: include Full-Name: */ 199 # define M_XDOT 'X' /* use hidden-dot algorithm */ 200 # define M_TRYRULESET5 '5' /* use ruleset 5 after local aliasing */ 201 # define M_7BITS '7' /* use 7-bit path */ 202 # define M_CHECKINCLUDE ':' /* check for :include: files */ 203 # define M_CHECKPROG '|' /* check for |program addresses */ 204 # define M_CHECKFILE '/' /* check for /file addresses */ 205 # define M_CHECKUDB '@' /* user can be user database key */ 206 207 EXTERN MAILER *Mailer[MAXMAILERS+1]; 208 209 EXTERN MAILER *LocalMailer; /* ptr to local mailer */ 210 EXTERN MAILER *ProgMailer; /* ptr to program mailer */ 211 EXTERN MAILER *FileMailer; /* ptr to *file* mailer */ 212 EXTERN MAILER *InclMailer; /* ptr to *include* mailer */ 213 /* 214 ** Header structure. 215 ** This structure is used internally to store header items. 216 */ 217 218 struct header 219 { 220 char *h_field; /* the name of the field */ 221 char *h_value; /* the value of that field */ 222 struct header *h_link; /* the next header */ 223 u_short h_flags; /* status bits, see below */ 224 BITMAP h_mflags; /* m_flags bits needed */ 225 }; 226 227 typedef struct header HDR; 228 229 /* 230 ** Header information structure. 231 ** Defined in conf.c, this struct declares the header fields 232 ** that have some magic meaning. 233 */ 234 235 struct hdrinfo 236 { 237 char *hi_field; /* the name of the field */ 238 u_short hi_flags; /* status bits, see below */ 239 }; 240 241 extern struct hdrinfo HdrInfo[]; 242 243 /* bits for h_flags and hi_flags */ 244 # define H_EOH 0x0001 /* this field terminates header */ 245 # define H_RCPT 0x0002 /* contains recipient addresses */ 246 # define H_DEFAULT 0x0004 /* if another value is found, drop this */ 247 # define H_RESENT 0x0008 /* this address is a "Resent-..." address */ 248 # define H_CHECK 0x0010 /* check h_mflags against m_flags */ 249 # define H_ACHECK 0x0020 /* ditto, but always (not just default) */ 250 # define H_FORCE 0x0040 /* force this field, even if default */ 251 # define H_TRACE 0x0080 /* this field contains trace information */ 252 # define H_FROM 0x0100 /* this is a from-type field */ 253 # define H_VALID 0x0200 /* this field has a validated value */ 254 # define H_RECEIPTTO 0x0400 /* this field has return receipt info */ 255 # define H_ERRORSTO 0x0800 /* this field has error address info */ 256 # define H_CTE 0x1000 /* this field is a content-transfer-encoding */ 257 /* 258 ** Information about currently open connections to mailers, or to 259 ** hosts that we have looked up recently. 260 */ 261 262 # define MCI struct mailer_con_info 263 264 MCI 265 { 266 short mci_flags; /* flag bits, see below */ 267 short mci_errno; /* error number on last connection */ 268 short mci_herrno; /* h_errno from last DNS lookup */ 269 short mci_exitstat; /* exit status from last connection */ 270 short mci_state; /* SMTP state */ 271 long mci_maxsize; /* max size this server will accept */ 272 FILE *mci_in; /* input side of connection */ 273 FILE *mci_out; /* output side of connection */ 274 int mci_pid; /* process id of subordinate proc */ 275 char *mci_phase; /* SMTP phase string */ 276 struct mailer *mci_mailer; /* ptr to the mailer for this conn */ 277 char *mci_host; /* host name */ 278 time_t mci_lastuse; /* last usage time */ 279 }; 280 281 282 /* flag bits */ 283 #define MCIF_VALID 0x0001 /* this entry is valid */ 284 #define MCIF_TEMP 0x0002 /* don't cache this connection */ 285 #define MCIF_CACHED 0x0004 /* currently in open cache */ 286 #define MCIF_ESMTP 0x0008 /* this host speaks ESMTP */ 287 #define MCIF_EXPN 0x0010 /* EXPN command supported */ 288 #define MCIF_SIZE 0x0020 /* SIZE option supported */ 289 #define MCIF_8BITMIME 0x0040 /* BODY=8BITMIME supported */ 290 #define MCIF_7BIT 0x0080 /* strip this message to 7 bits */ 291 #define MCIF_MULTSTAT 0x0100 /* MAIL11V3: handles MULT status */ 292 #define MCIF_INHEADER 0x0200 /* currently outputing header */ 293 #define MCIF_CVT8TO7 0x0400 /* convert from 8 to 7 bits */ 294 295 /* states */ 296 #define MCIS_CLOSED 0 /* no traffic on this connection */ 297 #define MCIS_OPENING 1 /* sending initial protocol */ 298 #define MCIS_OPEN 2 /* open, initial protocol sent */ 299 #define MCIS_ACTIVE 3 /* message being sent */ 300 #define MCIS_QUITING 4 /* running quit protocol */ 301 #define MCIS_SSD 5 /* service shutting down */ 302 #define MCIS_ERROR 6 /* I/O error on connection */ 303 /* 304 ** Envelope structure. 305 ** This structure defines the message itself. There is usually 306 ** only one of these -- for the message that we originally read 307 ** and which is our primary interest -- but other envelopes can 308 ** be generated during processing. For example, error messages 309 ** will have their own envelope. 310 */ 311 312 # define ENVELOPE struct envelope 313 314 ENVELOPE 315 { 316 HDR *e_header; /* head of header list */ 317 long e_msgpriority; /* adjusted priority of this message */ 318 time_t e_ctime; /* time message appeared in the queue */ 319 char *e_to; /* the target person */ 320 char *e_receiptto; /* return receipt address */ 321 ADDRESS e_from; /* the person it is from */ 322 char *e_sender; /* e_from.q_paddr w comments stripped */ 323 char **e_fromdomain; /* the domain part of the sender */ 324 ADDRESS *e_sendqueue; /* list of message recipients */ 325 ADDRESS *e_errorqueue; /* the queue for error responses */ 326 long e_msgsize; /* size of the message in bytes */ 327 long e_flags; /* flags, see below */ 328 int e_nrcpts; /* number of recipients */ 329 short e_class; /* msg class (priority, junk, etc.) */ 330 short e_hopcount; /* number of times processed */ 331 short e_nsent; /* number of sends since checkpoint */ 332 short e_sendmode; /* message send mode */ 333 short e_errormode; /* error return mode */ 334 int (*e_puthdr)__P((MCI *, HDR *, ENVELOPE *)); 335 /* function to put header of message */ 336 int (*e_putbody)__P((MCI *, ENVELOPE *, char *)); 337 /* function to put body of message */ 338 struct envelope *e_parent; /* the message this one encloses */ 339 struct envelope *e_sibling; /* the next envelope of interest */ 340 char *e_bodytype; /* type of message body */ 341 char *e_df; /* location of temp file */ 342 FILE *e_dfp; /* temporary file */ 343 char *e_id; /* code for this entry in queue */ 344 FILE *e_xfp; /* transcript file */ 345 FILE *e_lockfp; /* the lock file for this message */ 346 char *e_message; /* error message */ 347 char *e_statmsg; /* stat msg (changes per delivery) */ 348 char *e_msgboundary; /* MIME-style message part boundary */ 349 char *e_origrcpt; /* original recipient (one only) */ 350 time_t e_dtime; /* time of last delivery attempt */ 351 int e_ntries; /* number of delivery attempts */ 352 dev_t e_dfdev; /* df file's device, for crash recov */ 353 ino_t e_dfino; /* df file's ino, for crash recovery */ 354 char *e_macro[128]; /* macro definitions */ 355 }; 356 357 /* values for e_flags */ 358 #define EF_OLDSTYLE 0x0000001 /* use spaces (not commas) in hdrs */ 359 #define EF_INQUEUE 0x0000002 /* this message is fully queued */ 360 #define EF_NORETURN 0x0000004 /* don't return the message on error */ 361 #define EF_CLRQUEUE 0x0000008 /* disk copy is no longer needed */ 362 #define EF_SENDRECEIPT 0x0000010 /* send a return receipt */ 363 #define EF_FATALERRS 0x0000020 /* fatal errors occured */ 364 #define EF_KEEPQUEUE 0x0000040 /* keep queue files always */ 365 #define EF_RESPONSE 0x0000080 /* this is an error or return receipt */ 366 #define EF_RESENT 0x0000100 /* this message is being forwarded */ 367 #define EF_VRFYONLY 0x0000200 /* verify only (don't expand aliases) */ 368 #define EF_WARNING 0x0000400 /* warning message has been sent */ 369 #define EF_QUEUERUN 0x0000800 /* this envelope is from queue */ 370 #define EF_GLOBALERRS 0x0001000 /* treat errors as global */ 371 #define EF_PM_NOTIFY 0x0002000 /* send return mail to postmaster */ 372 #define EF_METOO 0x0004000 /* send to me too */ 373 #define EF_LOGSENDER 0x0008000 /* need to log the sender */ 374 #define EF_NORECEIPT 0x0010000 /* suppress all return-receipts */ 375 #define EF_HAS8BIT 0x0020000 /* at least one 8-bit char in body */ 376 #define EF_NL_NOT_EOL 0x0040000 /* don't accept raw NL as EOLine */ 377 #define EF_CRLF_NOT_EOL 0x0080000 /* don't accept CR-LF as EOLine */ 378 379 EXTERN ENVELOPE *CurEnv; /* envelope currently being processed */ 380 /* 381 ** Message priority classes. 382 ** 383 ** The message class is read directly from the Priority: header 384 ** field in the message. 385 ** 386 ** CurEnv->e_msgpriority is the number of bytes in the message plus 387 ** the creation time (so that jobs ``tend'' to be ordered correctly), 388 ** adjusted by the message class, the number of recipients, and the 389 ** amount of time the message has been sitting around. This number 390 ** is used to order the queue. Higher values mean LOWER priority. 391 ** 392 ** Each priority class point is worth WkClassFact priority points; 393 ** each recipient is worth WkRecipFact priority points. Each time 394 ** we reprocess a message the priority is adjusted by WkTimeFact. 395 ** WkTimeFact should normally decrease the priority so that jobs 396 ** that have historically failed will be run later; thanks go to 397 ** Jay Lepreau at Utah for pointing out the error in my thinking. 398 ** 399 ** The "class" is this number, unadjusted by the age or size of 400 ** this message. Classes with negative representations will have 401 ** error messages thrown away if they are not local. 402 */ 403 404 struct priority 405 { 406 char *pri_name; /* external name of priority */ 407 int pri_val; /* internal value for same */ 408 }; 409 410 EXTERN struct priority Priorities[MAXPRIORITIES]; 411 EXTERN int NumPriorities; /* pointer into Priorities */ 412 /* 413 ** Rewrite rules. 414 */ 415 416 struct rewrite 417 { 418 char **r_lhs; /* pattern match */ 419 char **r_rhs; /* substitution value */ 420 struct rewrite *r_next;/* next in chain */ 421 }; 422 423 EXTERN struct rewrite *RewriteRules[MAXRWSETS]; 424 425 /* 426 ** Special characters in rewriting rules. 427 ** These are used internally only. 428 ** The COND* rules are actually used in macros rather than in 429 ** rewriting rules, but are given here because they 430 ** cannot conflict. 431 */ 432 433 /* left hand side items */ 434 # define MATCHZANY 0220 /* match zero or more tokens */ 435 # define MATCHANY 0221 /* match one or more tokens */ 436 # define MATCHONE 0222 /* match exactly one token */ 437 # define MATCHCLASS 0223 /* match one token in a class */ 438 # define MATCHNCLASS 0224 /* match anything not in class */ 439 # define MATCHREPL 0225 /* replacement on RHS for above */ 440 441 /* right hand side items */ 442 # define CANONNET 0226 /* canonical net, next token */ 443 # define CANONHOST 0227 /* canonical host, next token */ 444 # define CANONUSER 0230 /* canonical user, next N tokens */ 445 # define CALLSUBR 0231 /* call another rewriting set */ 446 447 /* conditionals in macros */ 448 # define CONDIF 0232 /* conditional if-then */ 449 # define CONDELSE 0233 /* conditional else */ 450 # define CONDFI 0234 /* conditional fi */ 451 452 /* bracket characters for host name lookup */ 453 # define HOSTBEGIN 0235 /* hostname lookup begin */ 454 # define HOSTEND 0236 /* hostname lookup end */ 455 456 /* bracket characters for generalized lookup */ 457 # define LOOKUPBEGIN 0205 /* generalized lookup begin */ 458 # define LOOKUPEND 0206 /* generalized lookup end */ 459 460 /* macro substitution character */ 461 # define MACROEXPAND 0201 /* macro expansion */ 462 # define MACRODEXPAND 0202 /* deferred macro expansion */ 463 464 /* to make the code clearer */ 465 # define MATCHZERO CANONHOST 466 467 /* external <==> internal mapping table */ 468 struct metamac 469 { 470 char metaname; /* external code (after $) */ 471 u_char metaval; /* internal code (as above) */ 472 }; 473 /* 474 ** Name canonification short circuit. 475 ** 476 ** If the name server for a host is down, the process of trying to 477 ** canonify the name can hang. This is similar to (but alas, not 478 ** identical to) looking up the name for delivery. This stab type 479 ** caches the result of the name server lookup so we don't hang 480 ** multiple times. 481 */ 482 483 #define NAMECANON struct _namecanon 484 485 NAMECANON 486 { 487 short nc_errno; /* cached errno */ 488 short nc_herrno; /* cached h_errno */ 489 short nc_stat; /* cached exit status code */ 490 short nc_flags; /* flag bits */ 491 char *nc_cname; /* the canonical name */ 492 }; 493 494 /* values for nc_flags */ 495 #define NCF_VALID 0x0001 /* entry valid */ 496 /* 497 ** Mapping functions 498 ** 499 ** These allow arbitrary mappings in the config file. The idea 500 ** (albeit not the implementation) comes from IDA sendmail. 501 */ 502 503 # define MAPCLASS struct _mapclass 504 # define MAP struct _map 505 506 507 /* 508 ** An actual map. 509 */ 510 511 MAP 512 { 513 MAPCLASS *map_class; /* the class of this map */ 514 char *map_mname; /* name of this map */ 515 int map_mflags; /* flags, see below */ 516 char *map_file; /* the (nominal) filename */ 517 ARBPTR_T map_db1; /* the open database ptr */ 518 ARBPTR_T map_db2; /* an "extra" database pointer */ 519 char *map_app; /* to append to successful matches */ 520 char *map_domain; /* the (nominal) NIS domain */ 521 char *map_rebuild; /* program to run to do auto-rebuild */ 522 time_t map_mtime; /* last database modification time */ 523 }; 524 525 /* bit values for map_flags */ 526 # define MF_VALID 0x0001 /* this entry is valid */ 527 # define MF_INCLNULL 0x0002 /* include null byte in key */ 528 # define MF_OPTIONAL 0x0004 /* don't complain if map not found */ 529 # define MF_NOFOLDCASE 0x0008 /* don't fold case in keys */ 530 # define MF_MATCHONLY 0x0010 /* don't use the map value */ 531 # define MF_OPEN 0x0020 /* this entry is open */ 532 # define MF_WRITABLE 0x0040 /* open for writing */ 533 # define MF_ALIAS 0x0080 /* this is an alias file */ 534 # define MF_TRY0NULL 0x0100 /* try with no null byte */ 535 # define MF_TRY1NULL 0x0200 /* try with the null byte */ 536 # define MF_LOCKED 0x0400 /* this map is currently locked */ 537 # define MF_ALIASWAIT 0x0800 /* alias map in aliaswait state */ 538 # define MF_IMPL_HASH 0x1000 /* implicit: underlying hash database */ 539 # define MF_IMPL_NDBM 0x2000 /* implicit: underlying NDBM database */ 540 # define MF_UNSAFEDB 0x4000 /* this map is world writable */ 541 542 543 /* 544 ** The class of a map -- essentially the functions to call 545 */ 546 547 MAPCLASS 548 { 549 char *map_cname; /* name of this map class */ 550 char *map_ext; /* extension for database file */ 551 short map_cflags; /* flag bits, see below */ 552 bool (*map_parse)__P((MAP *, char *)); 553 /* argument parsing function */ 554 char *(*map_lookup)__P((MAP *, char *, char **, int *)); 555 /* lookup function */ 556 void (*map_store)__P((MAP *, char *, char *)); 557 /* store function */ 558 bool (*map_open)__P((MAP *, int)); 559 /* open function */ 560 void (*map_close)__P((MAP *)); 561 /* close function */ 562 }; 563 564 /* bit values for map_cflags */ 565 #define MCF_ALIASOK 0x0001 /* can be used for aliases */ 566 #define MCF_ALIASONLY 0x0002 /* usable only for aliases */ 567 #define MCF_REBUILDABLE 0x0004 /* can rebuild alias files */ 568 /* 569 ** Symbol table definitions 570 */ 571 572 struct symtab 573 { 574 char *s_name; /* name to be entered */ 575 char s_type; /* general type (see below) */ 576 struct symtab *s_next; /* pointer to next in chain */ 577 union 578 { 579 BITMAP sv_class; /* bit-map of word classes */ 580 ADDRESS *sv_addr; /* pointer to address header */ 581 MAILER *sv_mailer; /* pointer to mailer */ 582 char *sv_alias; /* alias */ 583 MAPCLASS sv_mapclass; /* mapping function class */ 584 MAP sv_map; /* mapping function */ 585 char *sv_hostsig; /* host signature */ 586 MCI sv_mci; /* mailer connection info */ 587 NAMECANON sv_namecanon; /* canonical name cache */ 588 } s_value; 589 }; 590 591 typedef struct symtab STAB; 592 593 /* symbol types */ 594 # define ST_UNDEF 0 /* undefined type */ 595 # define ST_CLASS 1 /* class map */ 596 # define ST_ADDRESS 2 /* an address in parsed format */ 597 # define ST_MAILER 3 /* a mailer header */ 598 # define ST_ALIAS 4 /* an alias */ 599 # define ST_MAPCLASS 5 /* mapping function class */ 600 # define ST_MAP 6 /* mapping function */ 601 # define ST_HOSTSIG 7 /* host signature */ 602 # define ST_NAMECANON 8 /* cached canonical name */ 603 # define ST_MCI 16 /* mailer connection info (offset) */ 604 605 # define s_class s_value.sv_class 606 # define s_address s_value.sv_addr 607 # define s_mailer s_value.sv_mailer 608 # define s_alias s_value.sv_alias 609 # define s_mci s_value.sv_mci 610 # define s_mapclass s_value.sv_mapclass 611 # define s_hostsig s_value.sv_hostsig 612 # define s_map s_value.sv_map 613 # define s_namecanon s_value.sv_namecanon 614 615 extern STAB *stab __P((char *, int, int)); 616 extern void stabapply __P((void (*)(STAB *, int), int)); 617 618 /* opcodes to stab */ 619 # define ST_FIND 0 /* find entry */ 620 # define ST_ENTER 1 /* enter if not there */ 621 /* 622 ** STRUCT EVENT -- event queue. 623 ** 624 ** Maintained in sorted order. 625 ** 626 ** We store the pid of the process that set this event to insure 627 ** that when we fork we will not take events intended for the parent. 628 */ 629 630 struct event 631 { 632 time_t ev_time; /* time of the function call */ 633 int (*ev_func)__P((int)); 634 /* function to call */ 635 int ev_arg; /* argument to ev_func */ 636 int ev_pid; /* pid that set this event */ 637 struct event *ev_link; /* link to next item */ 638 }; 639 640 typedef struct event EVENT; 641 642 EXTERN EVENT *EventQueue; /* head of event queue */ 643 /* 644 ** Operation, send, error, and MIME modes 645 ** 646 ** The operation mode describes the basic operation of sendmail. 647 ** This can be set from the command line, and is "send mail" by 648 ** default. 649 ** 650 ** The send mode tells how to send mail. It can be set in the 651 ** configuration file. It's setting determines how quickly the 652 ** mail will be delivered versus the load on your system. If the 653 ** -v (verbose) flag is given, it will be forced to SM_DELIVER 654 ** mode. 655 ** 656 ** The error mode tells how to return errors. 657 */ 658 659 EXTERN char OpMode; /* operation mode, see below */ 660 661 #define MD_DELIVER 'm' /* be a mail sender */ 662 #define MD_SMTP 's' /* run SMTP on standard input */ 663 #define MD_ARPAFTP 'a' /* obsolete ARPANET mode (Grey Book) */ 664 #define MD_DAEMON 'd' /* run as a daemon */ 665 #define MD_VERIFY 'v' /* verify: don't collect or deliver */ 666 #define MD_TEST 't' /* test mode: resolve addrs only */ 667 #define MD_INITALIAS 'i' /* initialize alias database */ 668 #define MD_PRINT 'p' /* print the queue */ 669 #define MD_FREEZE 'z' /* freeze the configuration file */ 670 671 672 /* values for e_sendmode -- send modes */ 673 #define SM_DELIVER 'i' /* interactive delivery */ 674 #define SM_QUICKD 'j' /* deliver w/o queueing */ 675 #define SM_FORK 'b' /* deliver in background */ 676 #define SM_QUEUE 'q' /* queue, don't deliver */ 677 #define SM_VERIFY 'v' /* verify only (used internally) */ 678 679 /* used only as a parameter to sendall */ 680 #define SM_DEFAULT '\0' /* unspecified, use SendMode */ 681 682 683 /* values for e_errormode -- error handling modes */ 684 #define EM_PRINT 'p' /* print errors */ 685 #define EM_MAIL 'm' /* mail back errors */ 686 #define EM_WRITE 'w' /* write back errors */ 687 #define EM_BERKNET 'e' /* special berknet processing */ 688 #define EM_QUIET 'q' /* don't print messages (stat only) */ 689 690 691 /* MIME processing mode */ 692 EXTERN int MimeMode; 693 694 /* bit values for MimeMode */ 695 #define MM_CVTMIME 0x0001 /* convert 8 to 7 bit MIME */ 696 #define MM_PASS8BIT 0x0002 /* just send 8 bit data blind */ 697 #define MM_MIME8BIT 0x0004 /* convert 8-bit data to MIME */ 698 /* 699 ** Additional definitions 700 */ 701 702 703 /* 704 ** Privacy flags 705 ** These are bit values for the PrivacyFlags word. 706 */ 707 708 #define PRIV_PUBLIC 0 /* what have I got to hide? */ 709 #define PRIV_NEEDMAILHELO 0x0001 /* insist on HELO for MAIL, at least */ 710 #define PRIV_NEEDEXPNHELO 0x0002 /* insist on HELO for EXPN */ 711 #define PRIV_NEEDVRFYHELO 0x0004 /* insist on HELO for VRFY */ 712 #define PRIV_NOEXPN 0x0008 /* disallow EXPN command entirely */ 713 #define PRIV_NOVRFY 0x0010 /* disallow VRFY command entirely */ 714 #define PRIV_AUTHWARNINGS 0x0020 /* flag possible authorization probs */ 715 #define PRIV_NORECEIPTS 0x0040 /* disallow return receipts */ 716 #define PRIV_RESTRICTMAILQ 0x1000 /* restrict mailq command */ 717 #define PRIV_RESTRICTQRUN 0x2000 /* restrict queue run */ 718 #define PRIV_GOAWAY 0x0fff /* don't give no info, anyway, anyhow */ 719 720 /* struct defining such things */ 721 struct prival 722 { 723 char *pv_name; /* name of privacy flag */ 724 int pv_flag; /* numeric level */ 725 }; 726 727 728 /* 729 ** Flags passed to remotename, parseaddr, allocaddr, and buildaddr. 730 */ 731 732 #define RF_SENDERADDR 0x001 /* this is a sender address */ 733 #define RF_HEADERADDR 0x002 /* this is a header address */ 734 #define RF_CANONICAL 0x004 /* strip comment information */ 735 #define RF_ADDDOMAIN 0x008 /* OK to do domain extension */ 736 #define RF_COPYPARSE 0x010 /* copy parsed user & host */ 737 #define RF_COPYPADDR 0x020 /* copy print address */ 738 #define RF_COPYALL (RF_COPYPARSE|RF_COPYPADDR) 739 #define RF_COPYNONE 0 740 741 742 /* 743 ** Flags passed to safefile. 744 */ 745 746 #define SFF_ANYFILE 0 /* no special restrictions */ 747 #define SFF_MUSTOWN 0x0001 /* user must own this file */ 748 #define SFF_NOSLINK 0x0002 /* file cannot be a symbolic link */ 749 #define SFF_ROOTOK 0x0004 /* ok for root to own this file */ 750 751 752 /* 753 ** Regular UNIX sockaddrs are too small to handle ISO addresses, so 754 ** we are forced to declare a supertype here. 755 */ 756 757 union bigsockaddr 758 { 759 struct sockaddr sa; /* general version */ 760 #ifdef NETUNIX 761 struct sockaddr_un sunix; /* UNIX family */ 762 #endif 763 #ifdef NETINET 764 struct sockaddr_in sin; /* INET family */ 765 #endif 766 #ifdef NETISO 767 struct sockaddr_iso siso; /* ISO family */ 768 #endif 769 #ifdef NETNS 770 struct sockaddr_ns sns; /* XNS family */ 771 #endif 772 #ifdef NETX25 773 struct sockaddr_x25 sx25; /* X.25 family */ 774 #endif 775 }; 776 777 #define SOCKADDR union bigsockaddr 778 /* 779 ** Global variables. 780 */ 781 782 EXTERN bool FromFlag; /* if set, "From" person is explicit */ 783 EXTERN bool MeToo; /* send to the sender also */ 784 EXTERN bool IgnrDot; /* don't let dot end messages */ 785 EXTERN bool SaveFrom; /* save leading "From" lines */ 786 EXTERN bool Verbose; /* set if blow-by-blow desired */ 787 EXTERN bool GrabTo; /* if set, get recipients from msg */ 788 EXTERN bool SuprErrs; /* set if we are suppressing errors */ 789 EXTERN bool HoldErrs; /* only output errors to transcript */ 790 EXTERN bool NoConnect; /* don't connect to non-local mailers */ 791 EXTERN bool SuperSafe; /* be extra careful, even if expensive */ 792 EXTERN bool ForkQueueRuns; /* fork for each job when running the queue */ 793 EXTERN bool AutoRebuild; /* auto-rebuild the alias database as needed */ 794 EXTERN bool CheckAliases; /* parse addresses during newaliases */ 795 EXTERN bool NoAlias; /* suppress aliasing */ 796 EXTERN bool UseNameServer; /* use internet domain name server */ 797 EXTERN bool SevenBitInput; /* force 7-bit data on input */ 798 EXTERN bool HasEightBits; /* has at least one eight bit input byte */ 799 EXTERN time_t SafeAlias; /* interval to wait until @:@ in alias file */ 800 EXTERN FILE *InChannel; /* input connection */ 801 EXTERN FILE *OutChannel; /* output connection */ 802 EXTERN uid_t RealUid; /* when Daemon, real uid of caller */ 803 EXTERN gid_t RealGid; /* when Daemon, real gid of caller */ 804 EXTERN uid_t DefUid; /* default uid to run as */ 805 EXTERN gid_t DefGid; /* default gid to run as */ 806 EXTERN char *DefUser; /* default user to run as (from DefUid) */ 807 EXTERN int OldUmask; /* umask when sendmail starts up */ 808 EXTERN int Errors; /* set if errors (local to single pass) */ 809 EXTERN int ExitStat; /* exit status code */ 810 EXTERN int AliasLevel; /* depth of aliasing */ 811 EXTERN int LineNumber; /* line number in current input */ 812 EXTERN int LogLevel; /* level of logging to perform */ 813 EXTERN int FileMode; /* mode on files */ 814 EXTERN int QueueLA; /* load average starting forced queueing */ 815 EXTERN int RefuseLA; /* load average refusing connections are */ 816 EXTERN int CurrentLA; /* current load average */ 817 EXTERN long QueueFactor; /* slope of queue function */ 818 EXTERN time_t QueueIntvl; /* intervals between running the queue */ 819 EXTERN char *HelpFile; /* location of SMTP help file */ 820 EXTERN char *ErrMsgFile; /* file to prepend to all error messages */ 821 EXTERN char *StatFile; /* location of statistics summary */ 822 EXTERN char *QueueDir; /* location of queue directory */ 823 EXTERN char *FileName; /* name to print on error messages */ 824 EXTERN char *SmtpPhase; /* current phase in SMTP processing */ 825 EXTERN char *MyHostName; /* name of this host for SMTP messages */ 826 EXTERN char *RealHostName; /* name of host we are talking to */ 827 EXTERN SOCKADDR RealHostAddr; /* address of host we are talking to */ 828 EXTERN char *CurHostName; /* current host we are dealing with */ 829 EXTERN jmp_buf TopFrame; /* branch-to-top-of-loop-on-error frame */ 830 EXTERN bool QuickAbort; /* .... but only if we want a quick abort */ 831 EXTERN bool LogUsrErrs; /* syslog user errors (e.g., SMTP RCPT cmd) */ 832 EXTERN bool SendMIMEErrors; /* send error messages in MIME format */ 833 EXTERN bool MatchGecos; /* look for user names in gecos field */ 834 EXTERN bool UseErrorsTo; /* use Errors-To: header (back compat) */ 835 EXTERN bool TryNullMXList; /* if we are the best MX, try host directly */ 836 EXTERN bool InChild; /* true if running in an SMTP subprocess */ 837 EXTERN bool DisConnected; /* running with OutChannel redirected to xf */ 838 EXTERN char SpaceSub; /* substitution for <lwsp> */ 839 EXTERN int PrivacyFlags; /* privacy flags */ 840 EXTERN char *ConfFile; /* location of configuration file [conf.c] */ 841 extern char *PidFile; /* location of proc id file [conf.c] */ 842 extern ADDRESS NullAddress; /* a null (template) address [main.c] */ 843 EXTERN long WkClassFact; /* multiplier for message class -> priority */ 844 EXTERN long WkRecipFact; /* multiplier for # of recipients -> priority */ 845 EXTERN long WkTimeFact; /* priority offset each time this job is run */ 846 EXTERN char *UdbSpec; /* user database source spec */ 847 EXTERN int MaxHopCount; /* max # of hops until bounce */ 848 EXTERN int ConfigLevel; /* config file level */ 849 EXTERN char *TimeZoneSpec; /* override time zone specification */ 850 EXTERN char *ForwardPath; /* path to search for .forward files */ 851 EXTERN long MinBlocksFree; /* min # of blocks free on queue fs */ 852 EXTERN char *FallBackMX; /* fall back MX host */ 853 EXTERN long MaxMessageSize; /* advertised max size we will accept */ 854 EXTERN time_t MaxHostStatAge; /* max age of cached host status info */ 855 EXTERN time_t MinQueueAge; /* min delivery interval */ 856 EXTERN int DeliveryNiceness; /* how nice to be during delivery */ 857 EXTERN char *PostMasterCopy; /* address to get errs cc's */ 858 EXTERN int CheckpointInterval; /* queue file checkpoint interval */ 859 EXTERN bool DontPruneRoutes; /* don't prune source routes */ 860 EXTERN bool BrokenSmtpPeers; /* peers can't handle 2-line greeting */ 861 EXTERN bool SortQueueByHost; /* order queue by host name first */ 862 EXTERN int MaxMciCache; /* maximum entries in MCI cache */ 863 EXTERN time_t MciCacheTimeout; /* maximum idle time on connections */ 864 EXTERN char *QueueLimitRecipient; /* limit queue runs to this recipient */ 865 EXTERN char *QueueLimitSender; /* limit queue runs to this sender */ 866 EXTERN char *QueueLimitId; /* limit queue runs to this id */ 867 EXTERN FILE *TrafficLogFile; /* file in which to log all traffic */ 868 extern int errno; 869 870 871 /* 872 ** Timeouts 873 ** 874 ** Indicated values are the MINIMUM per RFC 1123 section 5.3.2. 875 */ 876 877 EXTERN struct 878 { 879 /* RFC 1123-specified timeouts [minimum value] */ 880 time_t to_initial; /* initial greeting timeout [5m] */ 881 time_t to_mail; /* MAIL command [5m] */ 882 time_t to_rcpt; /* RCPT command [5m] */ 883 time_t to_datainit; /* DATA initiation [2m] */ 884 time_t to_datablock; /* DATA block [3m] */ 885 time_t to_datafinal; /* DATA completion [10m] */ 886 time_t to_nextcommand; /* next command [5m] */ 887 /* following timeouts are not mentioned in RFC 1123 */ 888 time_t to_rset; /* RSET command */ 889 time_t to_helo; /* HELO command */ 890 time_t to_quit; /* QUIT command */ 891 time_t to_miscshort; /* misc short commands (NOOP, VERB, etc) */ 892 time_t to_ident; /* IDENT protocol requests */ 893 time_t to_fileopen; /* opening :include: and .forward files */ 894 /* following are per message */ 895 time_t to_q_return; /* queue return timeout */ 896 time_t to_q_warning; /* queue warning timeout */ 897 } TimeOuts; 898 899 900 /* 901 ** Trace information 902 */ 903 904 /* trace vector and macros for debugging flags */ 905 EXTERN u_char tTdvect[100]; 906 # define tTd(flag, level) (tTdvect[flag] >= level) 907 # define tTdlevel(flag) (tTdvect[flag]) 908 /* 909 ** Miscellaneous information. 910 */ 911 912 913 914 /* 915 ** Some in-line functions 916 */ 917 918 /* set exit status */ 919 #define setstat(s) { \ 920 if (ExitStat == EX_OK || ExitStat == EX_TEMPFAIL) \ 921 ExitStat = s; \ 922 } 923 924 /* make a copy of a string */ 925 #define newstr(s) strcpy(xalloc(strlen(s) + 1), s) 926 927 #define STRUCTCOPY(s, d) d = s 928 929 930 /* 931 ** Declarations of useful functions 932 */ 933 934 extern ADDRESS *parseaddr __P((char *, ADDRESS *, int, int, char **, ENVELOPE *)); 935 extern char *xalloc __P((int)); 936 extern bool sameaddr __P((ADDRESS *, ADDRESS *)); 937 extern FILE *dfopen __P((char *, int, int)); 938 extern EVENT *setevent __P((time_t, int(*)(), int)); 939 extern char *sfgets __P((char *, int, FILE *, time_t, char *)); 940 extern char *queuename __P((ENVELOPE *, int)); 941 extern time_t curtime __P(()); 942 extern bool transienterror __P((int)); 943 extern const char *errstring __P((int)); 944 extern void expand __P((char *, char *, char *, ENVELOPE *)); 945 extern void define __P((int, char *, ENVELOPE *)); 946 extern char *macvalue __P((int, ENVELOPE *)); 947 extern char **prescan __P((char *, int, char[], int, char **)); 948 extern int rewrite __P((char **, int, int, ENVELOPE *)); 949 extern char *fgetfolded __P((char *, int, FILE *)); 950 extern ADDRESS *recipient __P((ADDRESS *, ADDRESS **, ENVELOPE *)); 951 extern ENVELOPE *newenvelope __P((ENVELOPE *, ENVELOPE *)); 952 extern void dropenvelope __P((ENVELOPE *)); 953 extern void clearenvelope __P((ENVELOPE *, int)); 954 extern char *username __P(()); 955 extern MCI *mci_get __P((char *, MAILER *)); 956 extern char *pintvl __P((time_t, int)); 957 extern char *map_rewrite __P((MAP *, char *, int, char **)); 958 extern ADDRESS *getctladdr __P((ADDRESS *)); 959 extern char *anynet_ntoa __P((SOCKADDR *)); 960 extern char *remotename __P((char *, MAILER *, int, int *, ENVELOPE *)); 961 extern bool shouldqueue __P((long, time_t)); 962 extern bool lockfile __P((int, char *, char *, int)); 963 extern char *hostsignature __P((MAILER *, char *, ENVELOPE *)); 964 extern void openxscript __P((ENVELOPE *)); 965 extern void closexscript __P((ENVELOPE *)); 966 extern sigfunc_t setsignal __P((int, sigfunc_t)); 967 extern char *shortenstring __P((char *, int)); 968 extern bool usershellok __P((char *)); 969 extern void commaize __P((HDR *, char *, int, MCI *, ENVELOPE *)); 970 extern char *hvalue __P((char *, HDR *)); 971 972 /* ellipsis is a different case though */ 973 #ifdef __STDC__ 974 extern void auth_warning(ENVELOPE *, const char *, ...); 975 extern void syserr(const char *, ...); 976 extern void usrerr(const char *, ...); 977 extern void message(const char *, ...); 978 extern void nmessage(const char *, ...); 979 #else 980 extern void auth_warning(); 981 extern void syserr(); 982 extern void usrerr(); 983 extern void message(); 984 extern void nmessage(); 985 #endif 986