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 8.71 (Berkeley) 11/19/94 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 8.71 11/19/94"; 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_long 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 char *q_orcpt; /* ORCPT parameter from RCPT TO: line */ 113 char *q_status; /* status code & message for DSNs */ 114 time_t q_statdate; /* date of status message */ 115 char *q_statmta; /* MTA generating this message */ 116 }; 117 118 typedef struct address ADDRESS; 119 120 # define QDONTSEND 0x00000001 /* don't send to this address */ 121 # define QBADADDR 0x00000002 /* this address is verified bad */ 122 # define QGOODUID 0x00000004 /* the q_uid q_gid fields are good */ 123 # define QPRIMARY 0x00000008 /* set from argv */ 124 # define QQUEUEUP 0x00000010 /* queue for later transmission */ 125 # define QSENT 0x00000020 /* has been successfully delivered */ 126 # define QNOTREMOTE 0x00000040 /* address not for remote forwarding */ 127 # define QSELFREF 0x00000080 /* this address references itself */ 128 # define QVERIFIED 0x00000100 /* verified, but not expanded */ 129 # define QREPORT 0x00000200 /* report this addr in return message */ 130 # define QBOGUSSHELL 0x00000400 /* user has no valid shell listed */ 131 # define QUNSAFEADDR 0x00000800 /* address aquired via unsafe path */ 132 # define QPINGONSUCCESS 0x00001000 /* give return on successful delivery */ 133 # define QPINGONFAILURE 0x00002000 /* give return on failure */ 134 # define QPINGONDELAY 0x00004000 /* give return on message delay */ 135 # define QHASRETPARAM 0x00008000 /* RCPT command had RET argument */ 136 # define QNOBODYRETURN 0x00010000 /* don't return message body */ 137 # define QRELAYED 0x00020000 /* relayed to non-DSN aware mailer */ 138 139 # define NULLADDR ((ADDRESS *) NULL) 140 /* 141 ** Mailer definition structure. 142 ** Every mailer known to the system is declared in this 143 ** structure. It defines the pathname of the mailer, some 144 ** flags associated with it, and the argument vector to 145 ** pass to it. The flags are defined in conf.c 146 ** 147 ** The argument vector is expanded before actual use. All 148 ** words except the first are passed through the macro 149 ** processor. 150 */ 151 152 struct mailer 153 { 154 char *m_name; /* symbolic name of this mailer */ 155 char *m_mailer; /* pathname of the mailer to use */ 156 BITMAP m_flags; /* status flags, see below */ 157 short m_mno; /* mailer number internally */ 158 char **m_argv; /* template argument vector */ 159 short m_sh_rwset; /* rewrite set: sender header addresses */ 160 short m_se_rwset; /* rewrite set: sender envelope addresses */ 161 short m_rh_rwset; /* rewrite set: recipient header addresses */ 162 short m_re_rwset; /* rewrite set: recipient envelope addresses */ 163 char *m_eol; /* end of line string */ 164 long m_maxsize; /* size limit on message to this mailer */ 165 int m_linelimit; /* max # characters per line */ 166 char *m_execdir; /* directory to chdir to before execv */ 167 uid_t m_uid; /* UID to run as */ 168 gid_t m_gid; /* GID to run as */ 169 char *m_defcharset; /* default character set */ 170 }; 171 172 typedef struct mailer MAILER; 173 174 /* bits for m_flags */ 175 # define M_ESMTP 'a' /* run Extended SMTP protocol */ 176 # define M_ALIASABLE 'A' /* user can be LHS of an alias */ 177 # define M_BLANKEND 'b' /* ensure blank line at end of message */ 178 # define M_NOCOMMENT 'c' /* don't include comment part of address */ 179 # define M_CANONICAL 'C' /* make addresses canonical "u@dom" */ 180 # define M_NOBRACKET 'd' /* never angle bracket envelope route-addrs */ 181 /* 'D' /* CF: include Date: */ 182 # define M_EXPENSIVE 'e' /* it costs to use this mailer.... */ 183 # define M_ESCFROM 'E' /* escape From lines to >From */ 184 # define M_FOPT 'f' /* mailer takes picky -f flag */ 185 /* 'F' /* CF: include From: or Resent-From: */ 186 # define M_NO_NULL_FROM 'g' /* sender of errors should be $g */ 187 # define M_HST_UPPER 'h' /* preserve host case distinction */ 188 # define M_PREHEAD 'H' /* MAIL11V3: preview headers */ 189 # define M_UDBENVELOPE 'i' /* do udbsender rewriting on envelope */ 190 # define M_INTERNAL 'I' /* SMTP to another sendmail site */ 191 # define M_NOLOOPCHECK 'k' /* don't check for loops in HELO command */ 192 # define M_LOCALMAILER 'l' /* delivery is to this host */ 193 # define M_LIMITS 'L' /* must enforce SMTP line limits */ 194 # define M_MUSER 'm' /* can handle multiple users at once */ 195 /* 'M' /* CF: include Message-Id: */ 196 # define M_NHDR 'n' /* don't insert From line */ 197 # define M_MANYSTATUS 'N' /* MAIL11V3: DATA returns multi-status */ 198 # define M_RUNASRCPT 'o' /* always run mailer as recipient */ 199 # define M_FROMPATH 'p' /* use reverse-path in MAIL FROM: */ 200 /* 'P' /* CF: include Return-Path: */ 201 # define M_ROPT 'r' /* mailer takes picky -r flag */ 202 # define M_SECURE_PORT 'R' /* try to send on a reserved TCP port */ 203 # define M_STRIPQ 's' /* strip quote chars from user/host */ 204 # define M_SPECIFIC_UID 'S' /* run as specific uid/gid */ 205 # define M_USR_UPPER 'u' /* preserve user case distinction */ 206 # define M_UGLYUUCP 'U' /* this wants an ugly UUCP from line */ 207 /* 'V' /* UIUC: !-relativize all addresses */ 208 # define M_HASPWENT 'w' /* check for /etc/passwd entry */ 209 /* 'x' /* CF: include Full-Name: */ 210 # define M_XDOT 'X' /* use hidden-dot algorithm */ 211 # define M_TRYRULESET5 '5' /* use ruleset 5 after local aliasing */ 212 # define M_7BITS '7' /* use 7-bit path */ 213 # define M_8BITS '8' /* force "just send 8" behaviour */ 214 # define M_CHECKINCLUDE ':' /* check for :include: files */ 215 # define M_CHECKPROG '|' /* check for |program addresses */ 216 # define M_CHECKFILE '/' /* check for /file addresses */ 217 # define M_CHECKUDB '@' /* user can be user database key */ 218 219 EXTERN MAILER *Mailer[MAXMAILERS+1]; 220 221 EXTERN MAILER *LocalMailer; /* ptr to local mailer */ 222 EXTERN MAILER *ProgMailer; /* ptr to program mailer */ 223 EXTERN MAILER *FileMailer; /* ptr to *file* mailer */ 224 EXTERN MAILER *InclMailer; /* ptr to *include* mailer */ 225 /* 226 ** Header structure. 227 ** This structure is used internally to store header items. 228 */ 229 230 struct header 231 { 232 char *h_field; /* the name of the field */ 233 char *h_value; /* the value of that field */ 234 struct header *h_link; /* the next header */ 235 u_short h_flags; /* status bits, see below */ 236 BITMAP h_mflags; /* m_flags bits needed */ 237 }; 238 239 typedef struct header HDR; 240 241 /* 242 ** Header information structure. 243 ** Defined in conf.c, this struct declares the header fields 244 ** that have some magic meaning. 245 */ 246 247 struct hdrinfo 248 { 249 char *hi_field; /* the name of the field */ 250 u_short hi_flags; /* status bits, see below */ 251 }; 252 253 extern struct hdrinfo HdrInfo[]; 254 255 /* bits for h_flags and hi_flags */ 256 # define H_EOH 0x0001 /* this field terminates header */ 257 # define H_RCPT 0x0002 /* contains recipient addresses */ 258 # define H_DEFAULT 0x0004 /* if another value is found, drop this */ 259 # define H_RESENT 0x0008 /* this address is a "Resent-..." address */ 260 # define H_CHECK 0x0010 /* check h_mflags against m_flags */ 261 # define H_ACHECK 0x0020 /* ditto, but always (not just default) */ 262 # define H_FORCE 0x0040 /* force this field, even if default */ 263 # define H_TRACE 0x0080 /* this field contains trace information */ 264 # define H_FROM 0x0100 /* this is a from-type field */ 265 # define H_VALID 0x0200 /* this field has a validated value */ 266 # define H_RECEIPTTO 0x0400 /* this field has return receipt info */ 267 # define H_ERRORSTO 0x0800 /* this field has error address info */ 268 # define H_CTE 0x1000 /* this field is a content-transfer-encoding */ 269 # define H_CTYPE 0x2000 /* this is a content-type field */ 270 /* 271 ** Information about currently open connections to mailers, or to 272 ** hosts that we have looked up recently. 273 */ 274 275 # define MCI struct mailer_con_info 276 277 MCI 278 { 279 short mci_flags; /* flag bits, see below */ 280 short mci_errno; /* error number on last connection */ 281 short mci_herrno; /* h_errno from last DNS lookup */ 282 short mci_exitstat; /* exit status from last connection */ 283 short mci_state; /* SMTP state */ 284 long mci_maxsize; /* max size this server will accept */ 285 FILE *mci_in; /* input side of connection */ 286 FILE *mci_out; /* output side of connection */ 287 int mci_pid; /* process id of subordinate proc */ 288 char *mci_phase; /* SMTP phase string */ 289 struct mailer *mci_mailer; /* ptr to the mailer for this conn */ 290 char *mci_host; /* host name */ 291 time_t mci_lastuse; /* last usage time */ 292 }; 293 294 295 /* flag bits */ 296 #define MCIF_VALID 0x0001 /* this entry is valid */ 297 #define MCIF_TEMP 0x0002 /* don't cache this connection */ 298 #define MCIF_CACHED 0x0004 /* currently in open cache */ 299 #define MCIF_ESMTP 0x0008 /* this host speaks ESMTP */ 300 #define MCIF_EXPN 0x0010 /* EXPN command supported */ 301 #define MCIF_SIZE 0x0020 /* SIZE option supported */ 302 #define MCIF_8BITMIME 0x0040 /* BODY=8BITMIME supported */ 303 #define MCIF_7BIT 0x0080 /* strip this message to 7 bits */ 304 #define MCIF_MULTSTAT 0x0100 /* MAIL11V3: handles MULT status */ 305 #define MCIF_INHEADER 0x0200 /* currently outputing header */ 306 #define MCIF_CVT8TO7 0x0400 /* convert from 8 to 7 bits */ 307 #define MCIF_DSN 0x0800 /* DSN extension supported */ 308 309 /* states */ 310 #define MCIS_CLOSED 0 /* no traffic on this connection */ 311 #define MCIS_OPENING 1 /* sending initial protocol */ 312 #define MCIS_OPEN 2 /* open, initial protocol sent */ 313 #define MCIS_ACTIVE 3 /* message being sent */ 314 #define MCIS_QUITING 4 /* running quit protocol */ 315 #define MCIS_SSD 5 /* service shutting down */ 316 #define MCIS_ERROR 6 /* I/O error on connection */ 317 /* 318 ** Envelope structure. 319 ** This structure defines the message itself. There is usually 320 ** only one of these -- for the message that we originally read 321 ** and which is our primary interest -- but other envelopes can 322 ** be generated during processing. For example, error messages 323 ** will have their own envelope. 324 */ 325 326 # define ENVELOPE struct envelope 327 328 ENVELOPE 329 { 330 HDR *e_header; /* head of header list */ 331 long e_msgpriority; /* adjusted priority of this message */ 332 time_t e_ctime; /* time message appeared in the queue */ 333 char *e_to; /* the target person */ 334 char *e_receiptto; /* return receipt address */ 335 ADDRESS e_from; /* the person it is from */ 336 char *e_sender; /* e_from.q_paddr w comments stripped */ 337 char **e_fromdomain; /* the domain part of the sender */ 338 ADDRESS *e_sendqueue; /* list of message recipients */ 339 ADDRESS *e_errorqueue; /* the queue for error responses */ 340 long e_msgsize; /* size of the message in bytes */ 341 long e_flags; /* flags, see below */ 342 int e_nrcpts; /* number of recipients */ 343 short e_class; /* msg class (priority, junk, etc.) */ 344 short e_hopcount; /* number of times processed */ 345 short e_nsent; /* number of sends since checkpoint */ 346 short e_sendmode; /* message send mode */ 347 short e_errormode; /* error return mode */ 348 short e_timeoutclass; /* message timeout class */ 349 int (*e_puthdr)__P((MCI *, HDR *, ENVELOPE *, int)); 350 /* function to put header of message */ 351 int (*e_putbody)__P((MCI *, ENVELOPE *, char *, int)); 352 /* function to put body of message */ 353 struct envelope *e_parent; /* the message this one encloses */ 354 struct envelope *e_sibling; /* the next envelope of interest */ 355 char *e_bodytype; /* type of message body */ 356 char *e_df; /* location of temp file */ 357 FILE *e_dfp; /* temporary file */ 358 char *e_id; /* code for this entry in queue */ 359 FILE *e_xfp; /* transcript file */ 360 FILE *e_lockfp; /* the lock file for this message */ 361 char *e_message; /* error message */ 362 char *e_statmsg; /* stat msg (changes per delivery) */ 363 char *e_msgboundary; /* MIME-style message part boundary */ 364 char *e_origrcpt; /* original recipient (one only) */ 365 char *e_envid; /* envelope id from MAIL FROM: line */ 366 time_t e_dtime; /* time of last delivery attempt */ 367 int e_ntries; /* number of delivery attempts */ 368 dev_t e_dfdev; /* df file's device, for crash recov */ 369 ino_t e_dfino; /* df file's ino, for crash recovery */ 370 char *e_macro[256]; /* macro definitions */ 371 }; 372 373 /* values for e_flags */ 374 #define EF_OLDSTYLE 0x0000001 /* use spaces (not commas) in hdrs */ 375 #define EF_INQUEUE 0x0000002 /* this message is fully queued */ 376 #define EF_NORETURN 0x0000004 /* don't return the message on error */ 377 #define EF_CLRQUEUE 0x0000008 /* disk copy is no longer needed */ 378 #define EF_SENDRECEIPT 0x0000010 /* send a return receipt */ 379 #define EF_FATALERRS 0x0000020 /* fatal errors occured */ 380 #define EF_KEEPQUEUE 0x0000040 /* keep queue files always */ 381 #define EF_RESPONSE 0x0000080 /* this is an error or return receipt */ 382 #define EF_RESENT 0x0000100 /* this message is being forwarded */ 383 #define EF_VRFYONLY 0x0000200 /* verify only (don't expand aliases) */ 384 #define EF_WARNING 0x0000400 /* warning message has been sent */ 385 #define EF_QUEUERUN 0x0000800 /* this envelope is from queue */ 386 #define EF_GLOBALERRS 0x0001000 /* treat errors as global */ 387 #define EF_PM_NOTIFY 0x0002000 /* send return mail to postmaster */ 388 #define EF_METOO 0x0004000 /* send to me too */ 389 #define EF_LOGSENDER 0x0008000 /* need to log the sender */ 390 #define EF_NORECEIPT 0x0010000 /* suppress all return-receipts */ 391 #define EF_HAS8BIT 0x0020000 /* at least one 8-bit char in body */ 392 #define EF_NL_NOT_EOL 0x0040000 /* don't accept raw NL as EOLine */ 393 #define EF_CRLF_NOT_EOL 0x0080000 /* don't accept CR-LF as EOLine */ 394 395 EXTERN ENVELOPE *CurEnv; /* envelope currently being processed */ 396 /* 397 ** Message priority classes. 398 ** 399 ** The message class is read directly from the Priority: header 400 ** field in the message. 401 ** 402 ** CurEnv->e_msgpriority is the number of bytes in the message plus 403 ** the creation time (so that jobs ``tend'' to be ordered correctly), 404 ** adjusted by the message class, the number of recipients, and the 405 ** amount of time the message has been sitting around. This number 406 ** is used to order the queue. Higher values mean LOWER priority. 407 ** 408 ** Each priority class point is worth WkClassFact priority points; 409 ** each recipient is worth WkRecipFact priority points. Each time 410 ** we reprocess a message the priority is adjusted by WkTimeFact. 411 ** WkTimeFact should normally decrease the priority so that jobs 412 ** that have historically failed will be run later; thanks go to 413 ** Jay Lepreau at Utah for pointing out the error in my thinking. 414 ** 415 ** The "class" is this number, unadjusted by the age or size of 416 ** this message. Classes with negative representations will have 417 ** error messages thrown away if they are not local. 418 */ 419 420 struct priority 421 { 422 char *pri_name; /* external name of priority */ 423 int pri_val; /* internal value for same */ 424 }; 425 426 EXTERN struct priority Priorities[MAXPRIORITIES]; 427 EXTERN int NumPriorities; /* pointer into Priorities */ 428 /* 429 ** Rewrite rules. 430 */ 431 432 struct rewrite 433 { 434 char **r_lhs; /* pattern match */ 435 char **r_rhs; /* substitution value */ 436 struct rewrite *r_next;/* next in chain */ 437 }; 438 439 EXTERN struct rewrite *RewriteRules[MAXRWSETS]; 440 441 /* 442 ** Special characters in rewriting rules. 443 ** These are used internally only. 444 ** The COND* rules are actually used in macros rather than in 445 ** rewriting rules, but are given here because they 446 ** cannot conflict. 447 */ 448 449 /* left hand side items */ 450 # define MATCHZANY 0220 /* match zero or more tokens */ 451 # define MATCHANY 0221 /* match one or more tokens */ 452 # define MATCHONE 0222 /* match exactly one token */ 453 # define MATCHCLASS 0223 /* match one token in a class */ 454 # define MATCHNCLASS 0224 /* match anything not in class */ 455 # define MATCHREPL 0225 /* replacement on RHS for above */ 456 457 /* right hand side items */ 458 # define CANONNET 0226 /* canonical net, next token */ 459 # define CANONHOST 0227 /* canonical host, next token */ 460 # define CANONUSER 0230 /* canonical user, next N tokens */ 461 # define CALLSUBR 0231 /* call another rewriting set */ 462 463 /* conditionals in macros */ 464 # define CONDIF 0232 /* conditional if-then */ 465 # define CONDELSE 0233 /* conditional else */ 466 # define CONDFI 0234 /* conditional fi */ 467 468 /* bracket characters for host name lookup */ 469 # define HOSTBEGIN 0235 /* hostname lookup begin */ 470 # define HOSTEND 0236 /* hostname lookup end */ 471 472 /* bracket characters for generalized lookup */ 473 # define LOOKUPBEGIN 0205 /* generalized lookup begin */ 474 # define LOOKUPEND 0206 /* generalized lookup end */ 475 476 /* macro substitution character */ 477 # define MACROEXPAND 0201 /* macro expansion */ 478 # define MACRODEXPAND 0202 /* deferred macro expansion */ 479 480 /* to make the code clearer */ 481 # define MATCHZERO CANONHOST 482 483 /* external <==> internal mapping table */ 484 struct metamac 485 { 486 char metaname; /* external code (after $) */ 487 u_char metaval; /* internal code (as above) */ 488 }; 489 /* 490 ** Name canonification short circuit. 491 ** 492 ** If the name server for a host is down, the process of trying to 493 ** canonify the name can hang. This is similar to (but alas, not 494 ** identical to) looking up the name for delivery. This stab type 495 ** caches the result of the name server lookup so we don't hang 496 ** multiple times. 497 */ 498 499 #define NAMECANON struct _namecanon 500 501 NAMECANON 502 { 503 short nc_errno; /* cached errno */ 504 short nc_herrno; /* cached h_errno */ 505 short nc_stat; /* cached exit status code */ 506 short nc_flags; /* flag bits */ 507 char *nc_cname; /* the canonical name */ 508 }; 509 510 /* values for nc_flags */ 511 #define NCF_VALID 0x0001 /* entry valid */ 512 /* 513 ** Mapping functions 514 ** 515 ** These allow arbitrary mappings in the config file. The idea 516 ** (albeit not the implementation) comes from IDA sendmail. 517 */ 518 519 # define MAPCLASS struct _mapclass 520 # define MAP struct _map 521 # define MAXMAPACTIONS 3 /* size of map_actions array */ 522 523 524 /* 525 ** An actual map. 526 */ 527 528 MAP 529 { 530 MAPCLASS *map_class; /* the class of this map */ 531 char *map_mname; /* name of this map */ 532 int map_mflags; /* flags, see below */ 533 char *map_file; /* the (nominal) filename */ 534 ARBPTR_T map_db1; /* the open database ptr */ 535 ARBPTR_T map_db2; /* an "extra" database pointer */ 536 char *map_keycolnm; /* key column name */ 537 char *map_valcolnm; /* value column name */ 538 u_char map_keycolno; /* key column number */ 539 u_char map_valcolno; /* value column number */ 540 char map_coldelim; /* column delimiter */ 541 char *map_app; /* to append to successful matches */ 542 char *map_domain; /* the (nominal) NIS domain */ 543 char *map_rebuild; /* program to run to do auto-rebuild */ 544 time_t map_mtime; /* last database modification time */ 545 MAP *map_stack[MAXMAPSTACK]; /* list for stacked maps */ 546 short map_return[MAXMAPACTIONS]; /* return bitmaps for stacked maps */ 547 }; 548 549 /* bit values for map_flags */ 550 # define MF_VALID 0x0001 /* this entry is valid */ 551 # define MF_INCLNULL 0x0002 /* include null byte in key */ 552 # define MF_OPTIONAL 0x0004 /* don't complain if map not found */ 553 # define MF_NOFOLDCASE 0x0008 /* don't fold case in keys */ 554 # define MF_MATCHONLY 0x0010 /* don't use the map value */ 555 # define MF_OPEN 0x0020 /* this entry is open */ 556 # define MF_WRITABLE 0x0040 /* open for writing */ 557 # define MF_ALIAS 0x0080 /* this is an alias file */ 558 # define MF_TRY0NULL 0x0100 /* try with no null byte */ 559 # define MF_TRY1NULL 0x0200 /* try with the null byte */ 560 # define MF_LOCKED 0x0400 /* this map is currently locked */ 561 # define MF_ALIASWAIT 0x0800 /* alias map in aliaswait state */ 562 # define MF_IMPL_HASH 0x1000 /* implicit: underlying hash database */ 563 # define MF_IMPL_NDBM 0x2000 /* implicit: underlying NDBM database */ 564 # define MF_UNSAFEDB 0x4000 /* this map is world writable */ 565 566 /* indices for map_actions */ 567 # define MA_NOTFOUND 0 /* member map returned "not found" */ 568 # define MA_UNAVAIL 1 /* member map is not available */ 569 # define MA_TRYAGAIN 2 /* member map returns temp failure */ 570 571 /* 572 ** The class of a map -- essentially the functions to call 573 */ 574 575 MAPCLASS 576 { 577 char *map_cname; /* name of this map class */ 578 char *map_ext; /* extension for database file */ 579 short map_cflags; /* flag bits, see below */ 580 bool (*map_parse)__P((MAP *, char *)); 581 /* argument parsing function */ 582 char *(*map_lookup)__P((MAP *, char *, char **, int *)); 583 /* lookup function */ 584 void (*map_store)__P((MAP *, char *, char *)); 585 /* store function */ 586 bool (*map_open)__P((MAP *, int)); 587 /* open function */ 588 void (*map_close)__P((MAP *)); 589 /* close function */ 590 }; 591 592 /* bit values for map_cflags */ 593 #define MCF_ALIASOK 0x0001 /* can be used for aliases */ 594 #define MCF_ALIASONLY 0x0002 /* usable only for aliases */ 595 #define MCF_REBUILDABLE 0x0004 /* can rebuild alias files */ 596 #define MCF_OPTFILE 0x0008 /* file name is optional */ 597 /* 598 ** Symbol table definitions 599 */ 600 601 struct symtab 602 { 603 char *s_name; /* name to be entered */ 604 char s_type; /* general type (see below) */ 605 struct symtab *s_next; /* pointer to next in chain */ 606 union 607 { 608 BITMAP sv_class; /* bit-map of word classes */ 609 ADDRESS *sv_addr; /* pointer to address header */ 610 MAILER *sv_mailer; /* pointer to mailer */ 611 char *sv_alias; /* alias */ 612 MAPCLASS sv_mapclass; /* mapping function class */ 613 MAP sv_map; /* mapping function */ 614 char *sv_hostsig; /* host signature */ 615 MCI sv_mci; /* mailer connection info */ 616 NAMECANON sv_namecanon; /* canonical name cache */ 617 int sv_macro; /* macro name => id mapping */ 618 } s_value; 619 }; 620 621 typedef struct symtab STAB; 622 623 /* symbol types */ 624 # define ST_UNDEF 0 /* undefined type */ 625 # define ST_CLASS 1 /* class map */ 626 # define ST_ADDRESS 2 /* an address in parsed format */ 627 # define ST_MAILER 3 /* a mailer header */ 628 # define ST_ALIAS 4 /* an alias */ 629 # define ST_MAPCLASS 5 /* mapping function class */ 630 # define ST_MAP 6 /* mapping function */ 631 # define ST_HOSTSIG 7 /* host signature */ 632 # define ST_NAMECANON 8 /* cached canonical name */ 633 # define ST_MACRO 9 /* macro name to id mapping */ 634 # define ST_MCI 16 /* mailer connection info (offset) */ 635 636 # define s_class s_value.sv_class 637 # define s_address s_value.sv_addr 638 # define s_mailer s_value.sv_mailer 639 # define s_alias s_value.sv_alias 640 # define s_mci s_value.sv_mci 641 # define s_mapclass s_value.sv_mapclass 642 # define s_hostsig s_value.sv_hostsig 643 # define s_map s_value.sv_map 644 # define s_namecanon s_value.sv_namecanon 645 # define s_macro s_value.sv_macro 646 647 extern STAB *stab __P((char *, int, int)); 648 extern void stabapply __P((void (*)(STAB *, int), int)); 649 650 /* opcodes to stab */ 651 # define ST_FIND 0 /* find entry */ 652 # define ST_ENTER 1 /* enter if not there */ 653 /* 654 ** STRUCT EVENT -- event queue. 655 ** 656 ** Maintained in sorted order. 657 ** 658 ** We store the pid of the process that set this event to insure 659 ** that when we fork we will not take events intended for the parent. 660 */ 661 662 struct event 663 { 664 time_t ev_time; /* time of the function call */ 665 int (*ev_func)__P((int)); 666 /* function to call */ 667 int ev_arg; /* argument to ev_func */ 668 int ev_pid; /* pid that set this event */ 669 struct event *ev_link; /* link to next item */ 670 }; 671 672 typedef struct event EVENT; 673 674 EXTERN EVENT *EventQueue; /* head of event queue */ 675 /* 676 ** Operation, send, error, and MIME modes 677 ** 678 ** The operation mode describes the basic operation of sendmail. 679 ** This can be set from the command line, and is "send mail" by 680 ** default. 681 ** 682 ** The send mode tells how to send mail. It can be set in the 683 ** configuration file. It's setting determines how quickly the 684 ** mail will be delivered versus the load on your system. If the 685 ** -v (verbose) flag is given, it will be forced to SM_DELIVER 686 ** mode. 687 ** 688 ** The error mode tells how to return errors. 689 */ 690 691 EXTERN char OpMode; /* operation mode, see below */ 692 693 #define MD_DELIVER 'm' /* be a mail sender */ 694 #define MD_SMTP 's' /* run SMTP on standard input */ 695 #define MD_ARPAFTP 'a' /* obsolete ARPANET mode (Grey Book) */ 696 #define MD_DAEMON 'd' /* run as a daemon */ 697 #define MD_VERIFY 'v' /* verify: don't collect or deliver */ 698 #define MD_TEST 't' /* test mode: resolve addrs only */ 699 #define MD_INITALIAS 'i' /* initialize alias database */ 700 #define MD_PRINT 'p' /* print the queue */ 701 #define MD_FREEZE 'z' /* freeze the configuration file */ 702 703 704 /* values for e_sendmode -- send modes */ 705 #define SM_DELIVER 'i' /* interactive delivery */ 706 #define SM_QUICKD 'j' /* deliver w/o queueing */ 707 #define SM_FORK 'b' /* deliver in background */ 708 #define SM_QUEUE 'q' /* queue, don't deliver */ 709 #define SM_VERIFY 'v' /* verify only (used internally) */ 710 711 /* used only as a parameter to sendall */ 712 #define SM_DEFAULT '\0' /* unspecified, use SendMode */ 713 714 715 /* values for e_errormode -- error handling modes */ 716 #define EM_PRINT 'p' /* print errors */ 717 #define EM_MAIL 'm' /* mail back errors */ 718 #define EM_WRITE 'w' /* write back errors */ 719 #define EM_BERKNET 'e' /* special berknet processing */ 720 #define EM_QUIET 'q' /* don't print messages (stat only) */ 721 722 723 /* MIME processing mode */ 724 EXTERN int MimeMode; 725 726 /* bit values for MimeMode */ 727 #define MM_CVTMIME 0x0001 /* convert 8 to 7 bit MIME */ 728 #define MM_PASS8BIT 0x0002 /* just send 8 bit data blind */ 729 #define MM_MIME8BIT 0x0004 /* convert 8-bit data to MIME */ 730 /* 731 ** Additional definitions 732 */ 733 734 735 /* 736 ** Privacy flags 737 ** These are bit values for the PrivacyFlags word. 738 */ 739 740 #define PRIV_PUBLIC 0 /* what have I got to hide? */ 741 #define PRIV_NEEDMAILHELO 0x0001 /* insist on HELO for MAIL, at least */ 742 #define PRIV_NEEDEXPNHELO 0x0002 /* insist on HELO for EXPN */ 743 #define PRIV_NEEDVRFYHELO 0x0004 /* insist on HELO for VRFY */ 744 #define PRIV_NOEXPN 0x0008 /* disallow EXPN command entirely */ 745 #define PRIV_NOVRFY 0x0010 /* disallow VRFY command entirely */ 746 #define PRIV_AUTHWARNINGS 0x0020 /* flag possible authorization probs */ 747 #define PRIV_NORECEIPTS 0x0040 /* disallow return receipts */ 748 #define PRIV_RESTRICTMAILQ 0x1000 /* restrict mailq command */ 749 #define PRIV_RESTRICTQRUN 0x2000 /* restrict queue run */ 750 #define PRIV_GOAWAY 0x0fff /* don't give no info, anyway, anyhow */ 751 752 /* struct defining such things */ 753 struct prival 754 { 755 char *pv_name; /* name of privacy flag */ 756 int pv_flag; /* numeric level */ 757 }; 758 759 760 /* 761 ** Flags passed to remotename, parseaddr, allocaddr, and buildaddr. 762 */ 763 764 #define RF_SENDERADDR 0x001 /* this is a sender address */ 765 #define RF_HEADERADDR 0x002 /* this is a header address */ 766 #define RF_CANONICAL 0x004 /* strip comment information */ 767 #define RF_ADDDOMAIN 0x008 /* OK to do domain extension */ 768 #define RF_COPYPARSE 0x010 /* copy parsed user & host */ 769 #define RF_COPYPADDR 0x020 /* copy print address */ 770 #define RF_COPYALL (RF_COPYPARSE|RF_COPYPADDR) 771 #define RF_COPYNONE 0 772 773 774 /* 775 ** Flags passed to safefile. 776 */ 777 778 #define SFF_ANYFILE 0 /* no special restrictions */ 779 #define SFF_MUSTOWN 0x0001 /* user must own this file */ 780 #define SFF_NOSLINK 0x0002 /* file cannot be a symbolic link */ 781 #define SFF_ROOTOK 0x0004 /* ok for root to own this file */ 782 783 784 /* 785 ** Flags passed to putheader and putbody. 786 */ 787 788 #define PF_NOBODYPART 0x0001 /* don't send the body part */ 789 790 791 /* 792 ** Regular UNIX sockaddrs are too small to handle ISO addresses, so 793 ** we are forced to declare a supertype here. 794 */ 795 796 union bigsockaddr 797 { 798 struct sockaddr sa; /* general version */ 799 #ifdef NETUNIX 800 struct sockaddr_un sunix; /* UNIX family */ 801 #endif 802 #ifdef NETINET 803 struct sockaddr_in sin; /* INET family */ 804 #endif 805 #ifdef NETISO 806 struct sockaddr_iso siso; /* ISO family */ 807 #endif 808 #ifdef NETNS 809 struct sockaddr_ns sns; /* XNS family */ 810 #endif 811 #ifdef NETX25 812 struct sockaddr_x25 sx25; /* X.25 family */ 813 #endif 814 }; 815 816 #define SOCKADDR union bigsockaddr 817 818 819 /* 820 ** Vendor codes 821 ** 822 ** Vendors can customize sendmail to add special behaviour, 823 ** generally for back compatibility. Ideally, this should 824 ** be set up in the .cf file using the "V" command. However, 825 ** it's quite reasonable for some vendors to want the default 826 ** be their old version; this can be set using 827 ** -DVENDOR_DEFAULT=VENDOR_xxx 828 ** in the Makefile. 829 ** 830 ** Vendors should apply to sendmail@CS.Berkeley.EDU for 831 ** unique vendor codes. 832 */ 833 834 #define VENDOR_BERKELEY 1 /* Berkeley-native configuration file */ 835 #define VENDOR_SUN 2 /* Sun-native configuration file */ 836 837 EXTERN int VendorCode; /* vendor-specific operation enhancements */ 838 /* 839 ** Global variables. 840 */ 841 842 EXTERN bool FromFlag; /* if set, "From" person is explicit */ 843 EXTERN bool MeToo; /* send to the sender also */ 844 EXTERN bool IgnrDot; /* don't let dot end messages */ 845 EXTERN bool SaveFrom; /* save leading "From" lines */ 846 EXTERN bool Verbose; /* set if blow-by-blow desired */ 847 EXTERN bool GrabTo; /* if set, get recipients from msg */ 848 EXTERN bool SuprErrs; /* set if we are suppressing errors */ 849 EXTERN bool HoldErrs; /* only output errors to transcript */ 850 EXTERN bool NoConnect; /* don't connect to non-local mailers */ 851 EXTERN bool SuperSafe; /* be extra careful, even if expensive */ 852 EXTERN bool ForkQueueRuns; /* fork for each job when running the queue */ 853 EXTERN bool AutoRebuild; /* auto-rebuild the alias database as needed */ 854 EXTERN bool CheckAliases; /* parse addresses during newaliases */ 855 EXTERN bool NoAlias; /* suppress aliasing */ 856 EXTERN bool UseNameServer; /* using DNS -- interpret h_errno & MX RRs */ 857 EXTERN bool SevenBitInput; /* force 7-bit data on input */ 858 EXTERN bool HasEightBits; /* has at least one eight bit input byte */ 859 EXTERN time_t SafeAlias; /* interval to wait until @:@ in alias file */ 860 EXTERN FILE *InChannel; /* input connection */ 861 EXTERN FILE *OutChannel; /* output connection */ 862 EXTERN uid_t RealUid; /* when Daemon, real uid of caller */ 863 EXTERN gid_t RealGid; /* when Daemon, real gid of caller */ 864 EXTERN uid_t DefUid; /* default uid to run as */ 865 EXTERN gid_t DefGid; /* default gid to run as */ 866 EXTERN char *DefUser; /* default user to run as (from DefUid) */ 867 EXTERN int OldUmask; /* umask when sendmail starts up */ 868 EXTERN int Errors; /* set if errors (local to single pass) */ 869 EXTERN int ExitStat; /* exit status code */ 870 EXTERN int AliasLevel; /* depth of aliasing */ 871 EXTERN int LineNumber; /* line number in current input */ 872 EXTERN int LogLevel; /* level of logging to perform */ 873 EXTERN int FileMode; /* mode on files */ 874 EXTERN int QueueLA; /* load average starting forced queueing */ 875 EXTERN int RefuseLA; /* load average refusing connections are */ 876 EXTERN int CurrentLA; /* current load average */ 877 EXTERN long QueueFactor; /* slope of queue function */ 878 EXTERN time_t QueueIntvl; /* intervals between running the queue */ 879 EXTERN char *HelpFile; /* location of SMTP help file */ 880 EXTERN char *ErrMsgFile; /* file to prepend to all error messages */ 881 EXTERN char *StatFile; /* location of statistics summary */ 882 EXTERN char *QueueDir; /* location of queue directory */ 883 EXTERN char *FileName; /* name to print on error messages */ 884 EXTERN char *SmtpPhase; /* current phase in SMTP processing */ 885 EXTERN char *MyHostName; /* name of this host for SMTP messages */ 886 EXTERN char *RealHostName; /* name of host we are talking to */ 887 EXTERN SOCKADDR RealHostAddr; /* address of host we are talking to */ 888 EXTERN char *CurHostName; /* current host we are dealing with */ 889 EXTERN jmp_buf TopFrame; /* branch-to-top-of-loop-on-error frame */ 890 EXTERN bool QuickAbort; /* .... but only if we want a quick abort */ 891 EXTERN bool LogUsrErrs; /* syslog user errors (e.g., SMTP RCPT cmd) */ 892 EXTERN bool SendMIMEErrors; /* send error messages in MIME format */ 893 EXTERN bool MatchGecos; /* look for user names in gecos field */ 894 EXTERN bool UseErrorsTo; /* use Errors-To: header (back compat) */ 895 EXTERN bool TryNullMXList; /* if we are the best MX, try host directly */ 896 EXTERN bool InChild; /* true if running in an SMTP subprocess */ 897 EXTERN bool DisConnected; /* running with OutChannel redirected to xf */ 898 EXTERN char SpaceSub; /* substitution for <lwsp> */ 899 EXTERN int PrivacyFlags; /* privacy flags */ 900 EXTERN char *ConfFile; /* location of configuration file [conf.c] */ 901 extern char *PidFile; /* location of proc id file [conf.c] */ 902 extern ADDRESS NullAddress; /* a null (template) address [main.c] */ 903 EXTERN long WkClassFact; /* multiplier for message class -> priority */ 904 EXTERN long WkRecipFact; /* multiplier for # of recipients -> priority */ 905 EXTERN long WkTimeFact; /* priority offset each time this job is run */ 906 EXTERN char *UdbSpec; /* user database source spec */ 907 EXTERN int MaxHopCount; /* max # of hops until bounce */ 908 EXTERN int ConfigLevel; /* config file level */ 909 EXTERN char *TimeZoneSpec; /* override time zone specification */ 910 EXTERN char *ForwardPath; /* path to search for .forward files */ 911 EXTERN long MinBlocksFree; /* min # of blocks free on queue fs */ 912 EXTERN char *FallBackMX; /* fall back MX host */ 913 EXTERN long MaxMessageSize; /* advertised max size we will accept */ 914 EXTERN time_t MaxHostStatAge; /* max age of cached host status info */ 915 EXTERN time_t MinQueueAge; /* min delivery interval */ 916 EXTERN char *ServiceSwitchFile; /* backup service switch */ 917 EXTERN char *DefaultCharSet; /* default character set for MIME */ 918 EXTERN int DeliveryNiceness; /* how nice to be during delivery */ 919 EXTERN char *PostMasterCopy; /* address to get errs cc's */ 920 EXTERN int CheckpointInterval; /* queue file checkpoint interval */ 921 EXTERN bool DontPruneRoutes; /* don't prune source routes */ 922 EXTERN bool BrokenSmtpPeers; /* peers can't handle 2-line greeting */ 923 EXTERN bool SortQueueByHost; /* order queue by host name first */ 924 EXTERN int MaxMciCache; /* maximum entries in MCI cache */ 925 EXTERN time_t MciCacheTimeout; /* maximum idle time on connections */ 926 EXTERN char *QueueLimitRecipient; /* limit queue runs to this recipient */ 927 EXTERN char *QueueLimitSender; /* limit queue runs to this sender */ 928 EXTERN char *QueueLimitId; /* limit queue runs to this id */ 929 EXTERN FILE *TrafficLogFile; /* file in which to log all traffic */ 930 extern int errno; 931 932 933 /* 934 ** Timeouts 935 ** 936 ** Indicated values are the MINIMUM per RFC 1123 section 5.3.2. 937 */ 938 939 EXTERN struct 940 { 941 /* RFC 1123-specified timeouts [minimum value] */ 942 time_t to_initial; /* initial greeting timeout [5m] */ 943 time_t to_mail; /* MAIL command [5m] */ 944 time_t to_rcpt; /* RCPT command [5m] */ 945 time_t to_datainit; /* DATA initiation [2m] */ 946 time_t to_datablock; /* DATA block [3m] */ 947 time_t to_datafinal; /* DATA completion [10m] */ 948 time_t to_nextcommand; /* next command [5m] */ 949 /* following timeouts are not mentioned in RFC 1123 */ 950 time_t to_rset; /* RSET command */ 951 time_t to_helo; /* HELO command */ 952 time_t to_quit; /* QUIT command */ 953 time_t to_miscshort; /* misc short commands (NOOP, VERB, etc) */ 954 time_t to_ident; /* IDENT protocol requests */ 955 time_t to_fileopen; /* opening :include: and .forward files */ 956 /* following are per message */ 957 time_t to_q_return[MAXTOCLASS]; /* queue return timeouts */ 958 time_t to_q_warning[MAXTOCLASS]; /* queue warning timeouts */ 959 } TimeOuts; 960 961 /* timeout classes for return and warning timeouts */ 962 # define TOC_NORMAL 0 /* normal delivery */ 963 # define TOC_URGENT 1 /* urgent delivery */ 964 # define TOC_NONURGENT 2 /* non-urgent delivery */ 965 966 967 /* 968 ** Trace information 969 */ 970 971 /* trace vector and macros for debugging flags */ 972 EXTERN u_char tTdvect[100]; 973 # define tTd(flag, level) (tTdvect[flag] >= level) 974 # define tTdlevel(flag) (tTdvect[flag]) 975 /* 976 ** Miscellaneous information. 977 */ 978 979 980 981 /* 982 ** Some in-line functions 983 */ 984 985 /* set exit status */ 986 #define setstat(s) { \ 987 if (ExitStat == EX_OK || ExitStat == EX_TEMPFAIL) \ 988 ExitStat = s; \ 989 } 990 991 /* make a copy of a string */ 992 #define newstr(s) strcpy(xalloc(strlen(s) + 1), s) 993 994 #define STRUCTCOPY(s, d) d = s 995 996 997 /* 998 ** Declarations of useful functions 999 */ 1000 1001 extern ADDRESS *parseaddr __P((char *, ADDRESS *, int, int, char **, ENVELOPE *)); 1002 extern char *xalloc __P((int)); 1003 extern bool sameaddr __P((ADDRESS *, ADDRESS *)); 1004 extern FILE *dfopen __P((char *, int, int)); 1005 extern EVENT *setevent __P((time_t, int(*)(), int)); 1006 extern char *sfgets __P((char *, int, FILE *, time_t, char *)); 1007 extern char *queuename __P((ENVELOPE *, int)); 1008 extern time_t curtime __P(()); 1009 extern bool transienterror __P((int)); 1010 extern const char *errstring __P((int)); 1011 extern void expand __P((char *, char *, char *, ENVELOPE *)); 1012 extern void define __P((int, char *, ENVELOPE *)); 1013 extern char *macvalue __P((int, ENVELOPE *)); 1014 extern char *macname __P((int)); 1015 extern int macid __P((char *, char **)); 1016 extern char **prescan __P((char *, int, char[], int, char **)); 1017 extern int rewrite __P((char **, int, int, ENVELOPE *)); 1018 extern char *fgetfolded __P((char *, int, FILE *)); 1019 extern ADDRESS *recipient __P((ADDRESS *, ADDRESS **, ENVELOPE *)); 1020 extern ENVELOPE *newenvelope __P((ENVELOPE *, ENVELOPE *)); 1021 extern void dropenvelope __P((ENVELOPE *)); 1022 extern void clearenvelope __P((ENVELOPE *, int)); 1023 extern char *username __P(()); 1024 extern MCI *mci_get __P((char *, MAILER *)); 1025 extern char *pintvl __P((time_t, int)); 1026 extern char *map_rewrite __P((MAP *, char *, int, char **)); 1027 extern ADDRESS *getctladdr __P((ADDRESS *)); 1028 extern char *anynet_ntoa __P((SOCKADDR *)); 1029 extern char *remotename __P((char *, MAILER *, int, int *, ENVELOPE *)); 1030 extern bool shouldqueue __P((long, time_t)); 1031 extern bool lockfile __P((int, char *, char *, int)); 1032 extern char *hostsignature __P((MAILER *, char *, ENVELOPE *)); 1033 extern void openxscript __P((ENVELOPE *)); 1034 extern void closexscript __P((ENVELOPE *)); 1035 extern sigfunc_t setsignal __P((int, sigfunc_t)); 1036 extern char *shortenstring __P((char *, int)); 1037 extern bool usershellok __P((char *)); 1038 extern void commaize __P((HDR *, char *, int, MCI *, ENVELOPE *)); 1039 extern char *hvalue __P((char *, HDR *)); 1040 extern char *defcharset __P((ENVELOPE *)); 1041 1042 /* ellipsis is a different case though */ 1043 #ifdef __STDC__ 1044 extern void auth_warning(ENVELOPE *, const char *, ...); 1045 extern void syserr(const char *, ...); 1046 extern void usrerr(const char *, ...); 1047 extern void message(const char *, ...); 1048 extern void nmessage(const char *, ...); 1049 #else 1050 extern void auth_warning(); 1051 extern void syserr(); 1052 extern void usrerr(); 1053 extern void message(); 1054 extern void nmessage(); 1055 #endif 1056