1 /* 2 * Copyright (c) 1983 Eric P. Allman 3 * Copyright (c) 1988 Regents of the University of California. 4 * All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 * 8 * @(#)sendmail.h 6.49 (Berkeley) 04/26/93 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 6.49 04/26/93"; 19 # endif 20 # else /* _DEFINE */ 21 # define EXTERN extern 22 # endif /* _DEFINE */ 23 24 # include <unistd.h> 25 # include <stddef.h> 26 # include <stdlib.h> 27 # include <stdio.h> 28 # include <ctype.h> 29 # include <setjmp.h> 30 # include <sysexits.h> 31 # include <string.h> 32 # include <time.h> 33 # include <errno.h> 34 35 # include "conf.h" 36 # include "useful.h" 37 38 # ifdef LOG 39 # include <syslog.h> 40 # endif /* LOG */ 41 42 # ifdef DAEMON 43 # include <sys/socket.h> 44 # endif 45 # ifdef NETINET 46 # include <netinet/in.h> 47 # endif 48 # ifdef NETISO 49 # include <netiso/iso.h> 50 # endif 51 # ifdef NETNS 52 # include <netns/ns.h> 53 # endif 54 # ifdef NETX25 55 # include <netccitt/x25.h> 56 # endif 57 58 59 60 61 /* 62 ** Data structure for bit maps. 63 ** 64 ** Each bit in this map can be referenced by an ascii character. 65 ** This is 128 possible bits, or 12 8-bit bytes. 66 */ 67 68 #define BITMAPBYTES 16 /* number of bytes in a bit map */ 69 #define BYTEBITS 8 /* number of bits in a byte */ 70 71 /* internal macros */ 72 #define _BITWORD(bit) (bit / (BYTEBITS * sizeof (int))) 73 #define _BITBIT(bit) (1 << (bit % (BYTEBITS * sizeof (int)))) 74 75 typedef int BITMAP[BITMAPBYTES / sizeof (int)]; 76 77 /* test bit number N */ 78 #define bitnset(bit, map) ((map)[_BITWORD(bit)] & _BITBIT(bit)) 79 80 /* set bit number N */ 81 #define setbitn(bit, map) (map)[_BITWORD(bit)] |= _BITBIT(bit) 82 83 /* clear bit number N */ 84 #define clrbitn(bit, map) (map)[_BITWORD(bit)] &= ~_BITBIT(bit) 85 86 /* clear an entire bit map */ 87 #define clrbitmap(map) bzero((char *) map, BITMAPBYTES) 88 /* 89 ** Address structure. 90 ** Addresses are stored internally in this structure. 91 */ 92 93 struct address 94 { 95 char *q_paddr; /* the printname for the address */ 96 char *q_user; /* user name */ 97 char *q_ruser; /* real user name, or NULL if q_user */ 98 char *q_host; /* host name */ 99 struct mailer *q_mailer; /* mailer to use */ 100 u_short q_flags; /* status flags, see below */ 101 uid_t q_uid; /* user-id of receiver (if known) */ 102 gid_t q_gid; /* group-id of receiver (if known) */ 103 char *q_home; /* home dir (local mailer only) */ 104 char *q_fullname; /* full name if known */ 105 struct address *q_next; /* chain */ 106 struct address *q_alias; /* address this results from */ 107 char *q_owner; /* owner of q_alias */ 108 struct address *q_tchain; /* temporary use chain */ 109 time_t q_timeout; /* timeout for this address */ 110 }; 111 112 typedef struct address ADDRESS; 113 114 # define QDONTSEND 000001 /* don't send to this address */ 115 # define QBADADDR 000002 /* this address is verified bad */ 116 # define QGOODUID 000004 /* the q_uid q_gid fields are good */ 117 # define QPRIMARY 000010 /* set from argv */ 118 # define QQUEUEUP 000020 /* queue for later transmission */ 119 # define QSENT 000040 /* has been successfully delivered */ 120 # define QNOTREMOTE 000100 /* not an address for remote forwarding */ 121 # define QSELFREF 000200 /* this address references itself */ 122 # define QVERIFIED 000400 /* verified, but not expanded */ 123 /* 124 ** Mailer definition structure. 125 ** Every mailer known to the system is declared in this 126 ** structure. It defines the pathname of the mailer, some 127 ** flags associated with it, and the argument vector to 128 ** pass to it. The flags are defined in conf.c 129 ** 130 ** The argument vector is expanded before actual use. All 131 ** words except the first are passed through the macro 132 ** processor. 133 */ 134 135 struct mailer 136 { 137 char *m_name; /* symbolic name of this mailer */ 138 char *m_mailer; /* pathname of the mailer to use */ 139 BITMAP m_flags; /* status flags, see below */ 140 short m_mno; /* mailer number internally */ 141 char **m_argv; /* template argument vector */ 142 short m_sh_rwset; /* rewrite set: sender header addresses */ 143 short m_se_rwset; /* rewrite set: sender envelope addresses */ 144 short m_rh_rwset; /* rewrite set: recipient header addresses */ 145 short m_re_rwset; /* rewrite set: recipient envelope addresses */ 146 char *m_eol; /* end of line string */ 147 long m_maxsize; /* size limit on message to this mailer */ 148 int m_linelimit; /* max # characters per line */ 149 char *m_execdir; /* directory to chdir to before execv */ 150 }; 151 152 typedef struct mailer MAILER; 153 154 /* bits for m_flags */ 155 # define M_NOCOMMENT 'c' /* don't include comment part of address */ 156 # define M_CANONICAL 'C' /* make addresses canonical "u@dom" */ 157 /* 'D' /* CF: include Date: */ 158 # define M_EXPENSIVE 'e' /* it costs to use this mailer.... */ 159 # define M_ESCFROM 'E' /* escape From lines to >From */ 160 # define M_FOPT 'f' /* mailer takes picky -f flag */ 161 /* 'F' /* CF: include From: or Resent-From: */ 162 # define M_HST_UPPER 'h' /* preserve host case distinction */ 163 /* 'H' /* UIUC: MAIL11V3: preview headers */ 164 # define M_INTERNAL 'I' /* SMTP to another sendmail site */ 165 # define M_LOCALMAILER 'l' /* delivery is to this host */ 166 # define M_LIMITS 'L' /* must enforce SMTP line limits */ 167 # define M_MUSER 'm' /* can handle multiple users at once */ 168 /* 'M' /* CF: include Message-Id: */ 169 # define M_NHDR 'n' /* don't insert From line */ 170 /* 'N' /* UIUC: MAIL11V3: DATA returns multi-status */ 171 # define M_FROMPATH 'p' /* use reverse-path in MAIL FROM: */ 172 /* 'P' /* CF: include Return-Path: */ 173 # define M_ROPT 'r' /* mailer takes picky -r flag */ 174 # define M_SECURE_PORT 'R' /* try to send on a reserved TCP port */ 175 # define M_STRIPQ 's' /* strip quote chars from user/host */ 176 # define M_RESTR 'S' /* must be daemon to execute */ 177 # define M_USR_UPPER 'u' /* preserve user case distinction */ 178 # define M_UGLYUUCP 'U' /* this wants an ugly UUCP from line */ 179 /* 'V' /* UIUC: !-relativize all addresses */ 180 # define M_XDOT 'X' /* use hidden-dot algorithm */ 181 # define M_7BITS '7' /* use 7-bit path */ 182 183 EXTERN MAILER *Mailer[MAXMAILERS+1]; 184 185 EXTERN MAILER *LocalMailer; /* ptr to local mailer */ 186 EXTERN MAILER *ProgMailer; /* ptr to program mailer */ 187 EXTERN MAILER *FileMailer; /* ptr to *file* mailer */ 188 EXTERN MAILER *InclMailer; /* ptr to *include* mailer */ 189 /* 190 ** Header structure. 191 ** This structure is used internally to store header items. 192 */ 193 194 struct header 195 { 196 char *h_field; /* the name of the field */ 197 char *h_value; /* the value of that field */ 198 struct header *h_link; /* the next header */ 199 u_short h_flags; /* status bits, see below */ 200 BITMAP h_mflags; /* m_flags bits needed */ 201 }; 202 203 typedef struct header HDR; 204 205 /* 206 ** Header information structure. 207 ** Defined in conf.c, this struct declares the header fields 208 ** that have some magic meaning. 209 */ 210 211 struct hdrinfo 212 { 213 char *hi_field; /* the name of the field */ 214 u_short hi_flags; /* status bits, see below */ 215 }; 216 217 extern struct hdrinfo HdrInfo[]; 218 219 /* bits for h_flags and hi_flags */ 220 # define H_EOH 00001 /* this field terminates header */ 221 # define H_RCPT 00002 /* contains recipient addresses */ 222 # define H_DEFAULT 00004 /* if another value is found, drop this */ 223 # define H_RESENT 00010 /* this address is a "Resent-..." address */ 224 # define H_CHECK 00020 /* check h_mflags against m_flags */ 225 # define H_ACHECK 00040 /* ditto, but always (not just default) */ 226 # define H_FORCE 00100 /* force this field, even if default */ 227 # define H_TRACE 00200 /* this field contains trace information */ 228 # define H_FROM 00400 /* this is a from-type field */ 229 # define H_VALID 01000 /* this field has a validated value */ 230 # define H_RECEIPTTO 02000 /* this field has return receipt info */ 231 # define H_ERRORSTO 04000 /* this field has error address info */ 232 /* 233 ** Envelope structure. 234 ** This structure defines the message itself. There is usually 235 ** only one of these -- for the message that we originally read 236 ** and which is our primary interest -- but other envelopes can 237 ** be generated during processing. For example, error messages 238 ** will have their own envelope. 239 */ 240 241 # define ENVELOPE struct envelope 242 243 ENVELOPE 244 { 245 HDR *e_header; /* head of header list */ 246 long e_msgpriority; /* adjusted priority of this message */ 247 time_t e_ctime; /* time message appeared in the queue */ 248 char *e_to; /* the target person */ 249 char *e_receiptto; /* return receipt address */ 250 ADDRESS e_from; /* the person it is from */ 251 char *e_sender; /* e_from.q_paddr w comments stripped */ 252 char **e_fromdomain; /* the domain part of the sender */ 253 ADDRESS *e_sendqueue; /* list of message recipients */ 254 ADDRESS *e_errorqueue; /* the queue for error responses */ 255 long e_msgsize; /* size of the message in bytes */ 256 int e_nrcpts; /* number of recipients */ 257 short e_class; /* msg class (priority, junk, etc.) */ 258 short e_flags; /* flags, see below */ 259 short e_hopcount; /* number of times processed */ 260 short e_nsent; /* number of sends since checkpoint */ 261 short e_sendmode; /* message send mode */ 262 short e_errormode; /* error return mode */ 263 int (*e_puthdr)__P((FILE *, MAILER *, ENVELOPE *)); 264 /* function to put header of message */ 265 int (*e_putbody)__P((FILE *, MAILER *, ENVELOPE *)); 266 /* function to put body of message */ 267 struct envelope *e_parent; /* the message this one encloses */ 268 struct envelope *e_sibling; /* the next envelope of interest */ 269 char *e_bodytype; /* type of message body */ 270 char *e_df; /* location of temp file */ 271 FILE *e_dfp; /* temporary file */ 272 char *e_id; /* code for this entry in queue */ 273 FILE *e_xfp; /* transcript file */ 274 FILE *e_lockfp; /* the lock file for this message */ 275 char *e_message; /* error message */ 276 char *e_statmsg; /* stat msg (changes per delivery) */ 277 char *e_macro[128]; /* macro definitions */ 278 }; 279 280 /* values for e_flags */ 281 #define EF_OLDSTYLE 000001 /* use spaces (not commas) in hdrs */ 282 #define EF_INQUEUE 000002 /* this message is fully queued */ 283 #define EF_TIMEOUT 000004 /* this message is too old */ 284 #define EF_CLRQUEUE 000010 /* disk copy is no longer needed */ 285 #define EF_SENDRECEIPT 000020 /* send a return receipt */ 286 #define EF_FATALERRS 000040 /* fatal errors occured */ 287 #define EF_KEEPQUEUE 000100 /* keep queue files always */ 288 #define EF_RESPONSE 000200 /* this is an error or return receipt */ 289 #define EF_RESENT 000400 /* this message is being forwarded */ 290 #define EF_VRFYONLY 001000 /* verify only (don't expand aliases) */ 291 #define EF_WARNING 002000 /* warning message has been sent */ 292 #define EF_QUEUERUN 004000 /* this envelope is from queue */ 293 294 EXTERN ENVELOPE *CurEnv; /* envelope currently being processed */ 295 /* 296 ** Message priority classes. 297 ** 298 ** The message class is read directly from the Priority: header 299 ** field in the message. 300 ** 301 ** CurEnv->e_msgpriority is the number of bytes in the message plus 302 ** the creation time (so that jobs ``tend'' to be ordered correctly), 303 ** adjusted by the message class, the number of recipients, and the 304 ** amount of time the message has been sitting around. This number 305 ** is used to order the queue. Higher values mean LOWER priority. 306 ** 307 ** Each priority class point is worth WkClassFact priority points; 308 ** each recipient is worth WkRecipFact priority points. Each time 309 ** we reprocess a message the priority is adjusted by WkTimeFact. 310 ** WkTimeFact should normally decrease the priority so that jobs 311 ** that have historically failed will be run later; thanks go to 312 ** Jay Lepreau at Utah for pointing out the error in my thinking. 313 ** 314 ** The "class" is this number, unadjusted by the age or size of 315 ** this message. Classes with negative representations will have 316 ** error messages thrown away if they are not local. 317 */ 318 319 struct priority 320 { 321 char *pri_name; /* external name of priority */ 322 int pri_val; /* internal value for same */ 323 }; 324 325 EXTERN struct priority Priorities[MAXPRIORITIES]; 326 EXTERN int NumPriorities; /* pointer into Priorities */ 327 /* 328 ** Rewrite rules. 329 */ 330 331 struct rewrite 332 { 333 char **r_lhs; /* pattern match */ 334 char **r_rhs; /* substitution value */ 335 struct rewrite *r_next;/* next in chain */ 336 }; 337 338 EXTERN struct rewrite *RewriteRules[MAXRWSETS]; 339 340 /* 341 ** Special characters in rewriting rules. 342 ** These are used internally only. 343 ** The COND* rules are actually used in macros rather than in 344 ** rewriting rules, but are given here because they 345 ** cannot conflict. 346 */ 347 348 /* left hand side items */ 349 # define MATCHZANY 0220 /* match zero or more tokens */ 350 # define MATCHANY 0221 /* match one or more tokens */ 351 # define MATCHONE 0222 /* match exactly one token */ 352 # define MATCHCLASS 0223 /* match one token in a class */ 353 # define MATCHNCLASS 0224 /* match anything not in class */ 354 # define MATCHREPL 0225 /* replacement on RHS for above */ 355 356 /* right hand side items */ 357 # define CANONNET 0226 /* canonical net, next token */ 358 # define CANONHOST 0227 /* canonical host, next token */ 359 # define CANONUSER 0230 /* canonical user, next N tokens */ 360 # define CALLSUBR 0231 /* call another rewriting set */ 361 362 /* conditionals in macros */ 363 # define CONDIF 0232 /* conditional if-then */ 364 # define CONDELSE 0233 /* conditional else */ 365 # define CONDFI 0234 /* conditional fi */ 366 367 /* bracket characters for host name lookup */ 368 # define HOSTBEGIN 0235 /* hostname lookup begin */ 369 # define HOSTEND 0236 /* hostname lookup end */ 370 371 /* bracket characters for generalized lookup */ 372 # define LOOKUPBEGIN 0205 /* generalized lookup begin */ 373 # define LOOKUPEND 0206 /* generalized lookup end */ 374 375 /* macro substitution character */ 376 # define MACROEXPAND 0201 /* macro expansion */ 377 # define MACRODEXPAND 0202 /* deferred macro expansion */ 378 379 /* to make the code clearer */ 380 # define MATCHZERO CANONHOST 381 382 /* external <==> internal mapping table */ 383 struct metamac 384 { 385 char metaname; /* external code (after $) */ 386 char metaval; /* internal code (as above) */ 387 }; 388 /* 389 ** Information about currently open connections to mailers, or to 390 ** hosts that we have looked up recently. 391 */ 392 393 # define MCI struct mailer_con_info 394 395 MCI 396 { 397 short mci_flags; /* flag bits, see below */ 398 short mci_errno; /* error number on last connection */ 399 short mci_exitstat; /* exit status from last connection */ 400 short mci_state; /* SMTP state */ 401 short mci_options; /* ESMTP options */ 402 long mci_maxsize; /* max size this server will accept */ 403 FILE *mci_in; /* input side of connection */ 404 FILE *mci_out; /* output side of connection */ 405 int mci_pid; /* process id of subordinate proc */ 406 char *mci_phase; /* SMTP phase string */ 407 struct mailer *mci_mailer; /* ptr to the mailer for this conn */ 408 char *mci_host; /* host name */ 409 time_t mci_lastuse; /* last usage time */ 410 }; 411 412 413 /* flag bits */ 414 #define MCIF_VALID 00001 /* this entry is valid */ 415 #define MCIF_TEMP 00002 /* don't cache this connection */ 416 #define MCIF_CACHED 00004 /* currently in open cache */ 417 418 /* states */ 419 #define MCIS_CLOSED 0 /* no traffic on this connection */ 420 #define MCIS_OPENING 1 /* sending initial protocol */ 421 #define MCIS_OPEN 2 /* open, initial protocol sent */ 422 #define MCIS_ACTIVE 3 /* message being sent */ 423 #define MCIS_QUITING 4 /* running quit protocol */ 424 #define MCIS_SSD 5 /* service shutting down */ 425 #define MCIS_ERROR 6 /* I/O error on connection */ 426 427 /* options bits */ 428 #define MCIO_EXPN 0x0001 /* EXPN command supported */ 429 #define MCIO_SIZE 0x0002 /* SIZE option supported */ 430 /* 431 ** Mapping functions 432 ** 433 ** These allow arbitrary mappings in the config file. The idea 434 ** (albeit not the implementation) comes from IDA sendmail. 435 */ 436 437 # define MAPCLASS struct _mapclass 438 # define MAP struct _map 439 440 441 /* 442 ** An actual map. 443 */ 444 445 MAP 446 { 447 MAPCLASS *map_class; /* the class of this map */ 448 int map_flags; /* flags, see below */ 449 char *map_file; /* the (nominal) filename */ 450 void *map_db; /* the open database ptr */ 451 char *map_app; /* to append to successful matches */ 452 char *map_domain; /* the (nominal) NIS domain */ 453 char *map_rebuild; /* program to run to do auto-rebuild */ 454 char **map_deplist; /* dependency list */ 455 }; 456 457 /* bit values for map_flags */ 458 # define MF_VALID 00001 /* this entry is valid */ 459 # define MF_INCLNULL 00002 /* include null byte in key */ 460 # define MF_OPTIONAL 00004 /* don't complain if map not found */ 461 # define MF_NOFOLDCASE 00010 /* don't fold case in keys */ 462 # define MF_MATCHONLY 00020 /* don't use the map value */ 463 464 465 /* 466 ** The class of a map -- essentially the functions to call 467 */ 468 469 MAPCLASS 470 { 471 bool (*map_init)__P((MAP *, char *, char *)); 472 /* initialization function */ 473 char *(*map_lookup)__P((MAP *, char *, int, char **, int *)); 474 /* lookup function */ 475 }; 476 /* 477 ** Symbol table definitions 478 */ 479 480 struct symtab 481 { 482 char *s_name; /* name to be entered */ 483 char s_type; /* general type (see below) */ 484 struct symtab *s_next; /* pointer to next in chain */ 485 union 486 { 487 BITMAP sv_class; /* bit-map of word classes */ 488 ADDRESS *sv_addr; /* pointer to address header */ 489 MAILER *sv_mailer; /* pointer to mailer */ 490 char *sv_alias; /* alias */ 491 MAPCLASS sv_mapclass; /* mapping function class */ 492 MAP sv_map; /* mapping function */ 493 char *sv_hostsig; /* host signature */ 494 MCI sv_mci; /* mailer connection info */ 495 } s_value; 496 }; 497 498 typedef struct symtab STAB; 499 500 /* symbol types */ 501 # define ST_UNDEF 0 /* undefined type */ 502 # define ST_CLASS 1 /* class map */ 503 # define ST_ADDRESS 2 /* an address in parsed format */ 504 # define ST_MAILER 3 /* a mailer header */ 505 # define ST_ALIAS 4 /* an alias */ 506 # define ST_MAPCLASS 5 /* mapping function class */ 507 # define ST_MAP 6 /* mapping function */ 508 # define ST_HOSTSIG 7 /* host signature */ 509 # define ST_MCI 16 /* mailer connection info (offset) */ 510 511 # define s_class s_value.sv_class 512 # define s_address s_value.sv_addr 513 # define s_mailer s_value.sv_mailer 514 # define s_alias s_value.sv_alias 515 # define s_mci s_value.sv_mci 516 # define s_mapclass s_value.sv_mapclass 517 # define s_hostsig s_value.sv_hostsig 518 # define s_map s_value.sv_map 519 520 extern STAB *stab(); 521 522 /* opcodes to stab */ 523 # define ST_FIND 0 /* find entry */ 524 # define ST_ENTER 1 /* enter if not there */ 525 /* 526 ** STRUCT EVENT -- event queue. 527 ** 528 ** Maintained in sorted order. 529 ** 530 ** We store the pid of the process that set this event to insure 531 ** that when we fork we will not take events intended for the parent. 532 */ 533 534 struct event 535 { 536 time_t ev_time; /* time of the function call */ 537 int (*ev_func)__P((int)); 538 /* function to call */ 539 int ev_arg; /* argument to ev_func */ 540 int ev_pid; /* pid that set this event */ 541 struct event *ev_link; /* link to next item */ 542 }; 543 544 typedef struct event EVENT; 545 546 EXTERN EVENT *EventQueue; /* head of event queue */ 547 /* 548 ** Operation, send, and error modes 549 ** 550 ** The operation mode describes the basic operation of sendmail. 551 ** This can be set from the command line, and is "send mail" by 552 ** default. 553 ** 554 ** The send mode tells how to send mail. It can be set in the 555 ** configuration file. It's setting determines how quickly the 556 ** mail will be delivered versus the load on your system. If the 557 ** -v (verbose) flag is given, it will be forced to SM_DELIVER 558 ** mode. 559 ** 560 ** The error mode tells how to return errors. 561 */ 562 563 EXTERN char OpMode; /* operation mode, see below */ 564 565 #define MD_DELIVER 'm' /* be a mail sender */ 566 #define MD_SMTP 's' /* run SMTP on standard input */ 567 #define MD_DAEMON 'd' /* run as a daemon */ 568 #define MD_VERIFY 'v' /* verify: don't collect or deliver */ 569 #define MD_TEST 't' /* test mode: resolve addrs only */ 570 #define MD_INITALIAS 'i' /* initialize alias database */ 571 #define MD_PRINT 'p' /* print the queue */ 572 #define MD_FREEZE 'z' /* freeze the configuration file */ 573 574 575 /* values for e_sendmode -- send modes */ 576 #define SM_DELIVER 'i' /* interactive delivery */ 577 #define SM_QUICKD 'j' /* deliver w/o queueing */ 578 #define SM_FORK 'b' /* deliver in background */ 579 #define SM_QUEUE 'q' /* queue, don't deliver */ 580 #define SM_VERIFY 'v' /* verify only (used internally) */ 581 582 /* used only as a parameter to sendall */ 583 #define SM_DEFAULT '\0' /* unspecified, use SendMode */ 584 585 586 /* values for e_errormode -- error handling modes */ 587 #define EM_PRINT 'p' /* print errors */ 588 #define EM_MAIL 'm' /* mail back errors */ 589 #define EM_WRITE 'w' /* write back errors */ 590 #define EM_BERKNET 'e' /* special berknet processing */ 591 #define EM_QUIET 'q' /* don't print messages (stat only) */ 592 /* 593 ** Additional definitions 594 */ 595 596 597 /* Offset used to ensure that name server error * codes are unique */ 598 #define MAX_ERRNO 100 599 600 601 /* 602 ** Privacy flags 603 ** These are bit values for the PrivacyFlags word. 604 */ 605 606 #define PRIV_PUBLIC 0 /* what have I got to hide? */ 607 #define PRIV_NEEDMAILHELO 00001 /* insist on HELO for MAIL, at least */ 608 #define PRIV_NEEDEXPNHELO 00002 /* insist on HELO for EXPN */ 609 #define PRIV_NEEDVRFYHELO 00004 /* insist on HELO for VRFY */ 610 #define PRIV_NOEXPN 00010 /* disallow EXPN command entirely */ 611 #define PRIV_NOVRFY 00020 /* disallow VRFY command entirely */ 612 #define PRIV_AUTHWARNINGS 00040 /* flag possible authorization probs */ 613 #define PRIV_RESTRMAILQ 01000 /* restrict mailq command */ 614 #define PRIV_GOAWAY 00777 /* don't give no info, anyway, anyhow */ 615 616 /* struct defining such things */ 617 struct prival 618 { 619 char *pv_name; /* name of privacy flag */ 620 int pv_flag; /* numeric level */ 621 }; 622 623 624 /* 625 ** Flags passed to remotename 626 */ 627 628 #define RF_SENDERADDR 0001 /* this is a sender address */ 629 #define RF_HEADERADDR 0002 /* this is a header address */ 630 #define RF_CANONICAL 0004 /* strip comment information */ 631 #define RF_ADDDOMAIN 0010 /* OK to do domain extension */ 632 633 634 /* 635 ** Regular UNIX sockaddrs are too small to handle ISO addresses, so 636 ** we are forced to declare a supertype here. 637 */ 638 639 union bigsockaddr 640 { 641 struct sockaddr sa; /* general version */ 642 #ifdef NETINET 643 struct sockaddr_in sin; /* INET family */ 644 #endif 645 #ifdef NETISO 646 struct sockaddr_iso siso; /* ISO family */ 647 #endif 648 #ifdef NETNS 649 struct sockaddr_ns sns; /* XNS family */ 650 #endif 651 #ifdef NETX25 652 struct sockaddr_x25 sx25; /* X.25 family */ 653 #endif 654 }; 655 656 #define SOCKADDR union bigsockaddr 657 658 /* 659 ** Global variables. 660 */ 661 662 EXTERN bool FromFlag; /* if set, "From" person is explicit */ 663 EXTERN bool NoAlias; /* if set, don't do any aliasing */ 664 EXTERN bool MeToo; /* send to the sender also */ 665 EXTERN bool IgnrDot; /* don't let dot end messages */ 666 EXTERN bool SaveFrom; /* save leading "From" lines */ 667 EXTERN bool Verbose; /* set if blow-by-blow desired */ 668 EXTERN bool GrabTo; /* if set, get recipients from msg */ 669 EXTERN bool NoReturn; /* don't return letter to sender */ 670 EXTERN bool SuprErrs; /* set if we are suppressing errors */ 671 EXTERN bool HoldErrs; /* only output errors to transcript */ 672 EXTERN bool NoConnect; /* don't connect to non-local mailers */ 673 EXTERN bool SuperSafe; /* be extra careful, even if expensive */ 674 EXTERN bool ForkQueueRuns; /* fork for each job when running the queue */ 675 EXTERN bool AutoRebuild; /* auto-rebuild the alias database as needed */ 676 EXTERN bool CheckAliases; /* parse addresses during newaliases */ 677 EXTERN bool UseNameServer; /* use internet domain name server */ 678 EXTERN bool EightBit; /* try to preserve 8-bit data */ 679 EXTERN int SafeAlias; /* minutes to wait until @:@ in alias file */ 680 EXTERN FILE *InChannel; /* input connection */ 681 EXTERN FILE *OutChannel; /* output connection */ 682 EXTERN uid_t RealUid; /* when Daemon, real uid of caller */ 683 EXTERN gid_t RealGid; /* when Daemon, real gid of caller */ 684 EXTERN uid_t DefUid; /* default uid to run as */ 685 EXTERN gid_t DefGid; /* default gid to run as */ 686 EXTERN char *DefUser; /* default user to run as (from DefUid) */ 687 EXTERN int OldUmask; /* umask when sendmail starts up */ 688 EXTERN int Errors; /* set if errors (local to single pass) */ 689 EXTERN int ExitStat; /* exit status code */ 690 EXTERN int AliasLevel; /* depth of aliasing */ 691 EXTERN int LineNumber; /* line number in current input */ 692 EXTERN int LogLevel; /* level of logging to perform */ 693 EXTERN int FileMode; /* mode on files */ 694 EXTERN int QueueLA; /* load average starting forced queueing */ 695 EXTERN int RefuseLA; /* load average refusing connections are */ 696 EXTERN int CurrentLA; /* current load average */ 697 EXTERN long QueueFactor; /* slope of queue function */ 698 EXTERN time_t QueueIntvl; /* intervals between running the queue */ 699 EXTERN char *AliasFile; /* location of alias file */ 700 EXTERN char *HelpFile; /* location of SMTP help file */ 701 EXTERN char *ErrMsgFile; /* file to prepend to all error messages */ 702 EXTERN char *StatFile; /* location of statistics summary */ 703 EXTERN char *QueueDir; /* location of queue directory */ 704 EXTERN char *FileName; /* name to print on error messages */ 705 EXTERN char *SmtpPhase; /* current phase in SMTP processing */ 706 EXTERN char *MyHostName; /* name of this host for SMTP messages */ 707 EXTERN char *RealHostName; /* name of host we are talking to */ 708 EXTERN SOCKADDR RealHostAddr; /* address of host we are talking to */ 709 EXTERN char *CurHostName; /* current host we are dealing with */ 710 EXTERN jmp_buf TopFrame; /* branch-to-top-of-loop-on-error frame */ 711 EXTERN bool QuickAbort; /* .... but only if we want a quick abort */ 712 EXTERN bool LogUsrErrs; /* syslog user errors (e.g., SMTP RCPT cmd) */ 713 EXTERN int PrivacyFlags; /* privacy flags */ 714 extern char *ConfFile; /* location of configuration file [conf.c] */ 715 extern char *FreezeFile; /* location of frozen memory image [conf.c] */ 716 extern char *PidFile; /* location of proc id file [conf.c] */ 717 extern ADDRESS NullAddress; /* a null (template) address [main.c] */ 718 EXTERN char SpaceSub; /* substitution for <lwsp> */ 719 EXTERN long WkClassFact; /* multiplier for message class -> priority */ 720 EXTERN long WkRecipFact; /* multiplier for # of recipients -> priority */ 721 EXTERN long WkTimeFact; /* priority offset each time this job is run */ 722 EXTERN char *PostMasterCopy; /* address to get errs cc's */ 723 EXTERN int CheckpointInterval; /* queue file checkpoint interval */ 724 EXTERN char *UdbSpec; /* user database source spec */ 725 EXTERN int MaxHopCount; /* max # of hops until bounce */ 726 EXTERN int ConfigLevel; /* config file level */ 727 EXTERN char *TimeZoneSpec; /* override time zone specification */ 728 EXTERN bool MatchGecos; /* look for user names in gecos field */ 729 EXTERN bool DontPruneRoutes; /* don't prune source routes */ 730 EXTERN int MaxMciCache; /* maximum entries in MCI cache */ 731 EXTERN time_t MciCacheTimeout; /* maximum idle time on connections */ 732 EXTERN char *ForwardPath; /* path to search for .forward files */ 733 EXTERN long MinBlocksFree; /* min # of blocks free on queue fs */ 734 EXTERN char *QueueLimitRecipient; /* limit queue runs to this recipient */ 735 EXTERN char *QueueLimitSender; /* limit queue runs to this sender */ 736 EXTERN char *QueueLimitId; /* limit queue runs to this id */ 737 EXTERN char *FallBackMX; /* fall back MX host */ 738 EXTERN long MaxMessageSize; /* advertised max size we will accept */ 739 740 741 /* 742 ** Timeouts 743 ** 744 ** Indicated values are the MINIMUM per RFC 1123 section 5.3.2. 745 */ 746 747 EXTERN struct 748 { 749 time_t to_initial; /* initial greeting timeout [5m] */ 750 time_t to_mail; /* MAIL command [5m] */ 751 time_t to_rcpt; /* RCPT command [5m] */ 752 time_t to_datainit; /* DATA initiation [2m] */ 753 time_t to_datablock; /* DATA block [3m] */ 754 time_t to_datafinal; /* DATA completion [10m] */ 755 time_t to_nextcommand; /* next command [5m] */ 756 /* following timeouts are not mentioned in RFC 1123 */ 757 time_t to_rset; /* RSET command */ 758 time_t to_helo; /* HELO command */ 759 time_t to_quit; /* QUIT command */ 760 time_t to_miscshort; /* misc short commands (NOOP, VERB, etc) */ 761 /* following are per message */ 762 time_t to_q_return; /* queue return timeout */ 763 time_t to_q_warning; /* queue warning timeout */ 764 } TimeOuts; 765 766 767 /* 768 ** Trace information 769 */ 770 771 /* trace vector and macros for debugging flags */ 772 EXTERN u_char tTdvect[100]; 773 # define tTd(flag, level) (tTdvect[flag] >= level) 774 # define tTdlevel(flag) (tTdvect[flag]) 775 /* 776 ** Miscellaneous information. 777 */ 778 779 780 781 /* 782 ** Some in-line functions 783 */ 784 785 /* set exit status */ 786 #define setstat(s) { \ 787 if (ExitStat == EX_OK || ExitStat == EX_TEMPFAIL) \ 788 ExitStat = s; \ 789 } 790 791 /* make a copy of a string */ 792 #define newstr(s) strcpy(xalloc(strlen(s) + 1), s) 793 794 #define STRUCTCOPY(s, d) d = s 795 796 797 /* 798 ** Declarations of useful functions 799 */ 800 801 extern ADDRESS *parseaddr __P((char *, ADDRESS *, int, char, char **, ENVELOPE *)); 802 extern char *xalloc __P((int)); 803 extern bool sameaddr __P((ADDRESS *, ADDRESS *)); 804 extern FILE *dfopen __P((char *, char *)); 805 extern EVENT *setevent __P((time_t, int(*)(), int)); 806 extern char *sfgets __P((char *, int, FILE *, time_t)); 807 extern char *queuename __P((ENVELOPE *, char)); 808 extern time_t curtime __P(()); 809 extern bool transienterror __P((int)); 810 extern char *errstring __P((int)); 811 812 /* ellipsis is a different case though */ 813 #ifdef __STDC__ 814 extern void auth_warning(ENVELOPE *, char *, ...); 815 extern void syserr(char *, ...); 816 extern void usrerr(char *, ...); 817 extern void message(char *, ...); 818 extern void nmessage(char *, ...); 819 #else 820 extern void auth_warning(); 821 extern void syserr(); 822 extern void usrerr(); 823 extern void message(); 824 extern void nmessage(); 825 #endif 826