1 /* 2 ** SENDMAIL.H -- Global definitions for sendmail. 3 */ 4 5 6 7 # ifdef _DEFINE 8 # define EXTERN 9 # ifndef lint 10 static char SmailSccsId[] = "@(#)sendmail.h 4.8 08/11/84"; 11 # endif lint 12 # else _DEFINE 13 # define EXTERN extern 14 # endif _DEFINE 15 16 # include <stdio.h> 17 # include <ctype.h> 18 # include <setjmp.h> 19 # include "conf.h" 20 # include "useful.h" 21 22 # ifdef LOG 23 # include <syslog.h> 24 # endif LOG 25 26 27 # define PSBUFSIZE (MAXNAME + MAXATOM) /* size of prescan buffer */ 28 29 30 /* 31 ** Data structure for bit maps. 32 ** 33 ** Each bit in this map can be referenced by an ascii character. 34 ** This is 128 possible bits, or 12 8-bit bytes. 35 */ 36 37 #define BITMAPBYTES 16 /* number of bytes in a bit map */ 38 #define BYTEBITS 8 /* number of bits in a byte */ 39 40 /* internal macros */ 41 #define _BITWORD(bit) (bit / (BYTEBITS * sizeof (int))) 42 #define _BITBIT(bit) (1 << (bit % (BYTEBITS * sizeof (int)))) 43 44 typedef int BITMAP[BITMAPBYTES / sizeof (int)]; 45 46 /* test bit number N */ 47 #define bitnset(bit, map) ((map)[_BITWORD(bit)] & _BITBIT(bit)) 48 49 /* set bit number N */ 50 #define setbitn(bit, map) (map)[_BITWORD(bit)] |= _BITBIT(bit) 51 52 /* clear bit number N */ 53 #define clrbitn(bit, map) (map)[_BITWORD(bit)] &= ~_BITBIT(bit) 54 55 /* clear an entire bit map */ 56 #define clrbitmap(map) bzero((char *) map, BITMAPBYTES) 57 /* 58 ** Address structure. 59 ** Addresses are stored internally in this structure. 60 */ 61 62 struct address 63 { 64 char *q_paddr; /* the printname for the address */ 65 char *q_user; /* user name */ 66 char *q_host; /* host name */ 67 struct mailer *q_mailer; /* mailer to use */ 68 u_short q_flags; /* status flags, see below */ 69 short q_uid; /* user-id of receiver (if known) */ 70 short q_gid; /* group-id of receiver (if known) */ 71 char *q_home; /* home dir (local mailer only) */ 72 char *q_fullname; /* full name if known */ 73 struct address *q_next; /* chain */ 74 struct address *q_alias; /* address this results from */ 75 struct address *q_tchain; /* temporary use chain */ 76 time_t q_timeout; /* timeout for this address */ 77 }; 78 79 typedef struct address ADDRESS; 80 81 # define QDONTSEND 000001 /* don't send to this address */ 82 # define QBADADDR 000002 /* this address is verified bad */ 83 # define QGOODUID 000004 /* the q_uid q_gid fields are good */ 84 # define QPRIMARY 000010 /* set from argv */ 85 # define QQUEUEUP 000020 /* queue for later transmission */ 86 /* 87 ** Mailer definition structure. 88 ** Every mailer known to the system is declared in this 89 ** structure. It defines the pathname of the mailer, some 90 ** flags associated with it, and the argument vector to 91 ** pass to it. The flags are defined in conf.c 92 ** 93 ** The argument vector is expanded before actual use. All 94 ** words except the first are passed through the macro 95 ** processor. 96 */ 97 98 struct mailer 99 { 100 char *m_name; /* symbolic name of this mailer */ 101 char *m_mailer; /* pathname of the mailer to use */ 102 BITMAP m_flags; /* status flags, see below */ 103 short m_mno; /* mailer number internally */ 104 char **m_argv; /* template argument vector */ 105 short m_s_rwset; /* rewriting set for sender addresses */ 106 short m_r_rwset; /* rewriting set for recipient addresses */ 107 char *m_eol; /* end of line string */ 108 long m_maxsize; /* size limit on message to this mailer */ 109 }; 110 111 typedef struct mailer MAILER; 112 113 /* bits for m_flags */ 114 # define M_CANONICAL 'C' /* make addresses canonical "u@dom" */ 115 # define M_EXPENSIVE 'e' /* it costs to use this mailer.... */ 116 # define M_ESCFROM 'E' /* escape From lines to >From */ 117 # define M_FOPT 'f' /* mailer takes picky -f flag */ 118 # define M_HST_UPPER 'h' /* preserve host case distinction */ 119 # define M_INTERNAL 'I' /* SMTP to another sendmail site */ 120 # define M_LOCAL 'l' /* delivery is to this host */ 121 # define M_LIMITS 'L' /* must enforce SMTP line limits */ 122 # define M_MUSER 'm' /* can handle multiple users at once */ 123 # define M_NHDR 'n' /* don't insert From line */ 124 # define M_FROMPATH 'p' /* use reverse-path in MAIL FROM: */ 125 # define M_ROPT 'r' /* mailer takes picky -r flag */ 126 # define M_STRIPQ 's' /* strip quote chars from user/host */ 127 # define M_RESTR 'S' /* must be daemon to execute */ 128 # define M_USR_UPPER 'u' /* preserve user case distinction */ 129 # define M_UGLYUUCP 'U' /* this wants an ugly UUCP from line */ 130 # define M_XDOT 'X' /* use hidden-dot algorithm */ 131 132 EXTERN MAILER *Mailer[MAXMAILERS+1]; 133 134 EXTERN MAILER *LocalMailer; /* ptr to local mailer */ 135 EXTERN MAILER *ProgMailer; /* ptr to program mailer */ 136 /* 137 ** Header structure. 138 ** This structure is used internally to store header items. 139 */ 140 141 struct header 142 { 143 char *h_field; /* the name of the field */ 144 char *h_value; /* the value of that field */ 145 struct header *h_link; /* the next header */ 146 u_short h_flags; /* status bits, see below */ 147 BITMAP h_mflags; /* m_flags bits needed */ 148 }; 149 150 typedef struct header HDR; 151 152 /* 153 ** Header information structure. 154 ** Defined in conf.c, this struct declares the header fields 155 ** that have some magic meaning. 156 */ 157 158 struct hdrinfo 159 { 160 char *hi_field; /* the name of the field */ 161 u_short hi_flags; /* status bits, see below */ 162 }; 163 164 extern struct hdrinfo HdrInfo[]; 165 166 /* bits for h_flags and hi_flags */ 167 # define H_EOH 00001 /* this field terminates header */ 168 # define H_RCPT 00002 /* contains recipient addresses */ 169 # define H_DEFAULT 00004 /* if another value is found, drop this */ 170 # define H_RESENT 00010 /* this address is a "Resent-..." address */ 171 # define H_CHECK 00020 /* check h_mflags against m_flags */ 172 # define H_ACHECK 00040 /* ditto, but always (not just default) */ 173 # define H_FORCE 00100 /* force this field, even if default */ 174 # define H_TRACE 00200 /* this field contains trace information */ 175 # define H_FROM 00400 /* this is a from-type field */ 176 /* 177 ** Envelope structure. 178 ** This structure defines the message itself. There is usually 179 ** only one of these -- for the message that we originally read 180 ** and which is our primary interest -- but other envelopes can 181 ** be generated during processing. For example, error messages 182 ** will have their own envelope. 183 */ 184 185 struct envelope 186 { 187 HDR *e_header; /* head of header list */ 188 long e_msgpriority; /* adjusted priority of this message */ 189 time_t e_ctime; /* time message appeared in the queue */ 190 char *e_to; /* the target person */ 191 char *e_receiptto; /* return receipt address */ 192 ADDRESS e_from; /* the person it is from */ 193 char **e_fromdomain; /* the domain part of the sender */ 194 ADDRESS *e_sendqueue; /* list of message recipients */ 195 ADDRESS *e_errorqueue; /* the queue for error responses */ 196 long e_msgsize; /* size of the message in bytes */ 197 short e_class; /* msg class (priority, junk, etc.) */ 198 short e_flags; /* flags, see below */ 199 short e_hopcount; /* number of times processed */ 200 int (*e_puthdr)(); /* function to put header of message */ 201 int (*e_putbody)(); /* function to put body of message */ 202 struct envelope *e_parent; /* the message this one encloses */ 203 struct envelope *e_sibling; /* the next envelope of interest */ 204 char *e_df; /* location of temp file */ 205 FILE *e_dfp; /* temporary file */ 206 char *e_id; /* code for this entry in queue */ 207 FILE *e_xfp; /* transcript file */ 208 char *e_message; /* error message */ 209 char *e_macro[128]; /* macro definitions */ 210 }; 211 212 typedef struct envelope ENVELOPE; 213 214 /* values for e_flags */ 215 #define EF_OLDSTYLE 000001 /* use spaces (not commas) in hdrs */ 216 #define EF_INQUEUE 000002 /* this message is fully queued */ 217 #define EF_TIMEOUT 000004 /* this message is too old */ 218 #define EF_CLRQUEUE 000010 /* disk copy is no longer needed */ 219 #define EF_SENDRECEIPT 000020 /* send a return receipt */ 220 #define EF_FATALERRS 000040 /* fatal errors occured */ 221 #define EF_KEEPQUEUE 000100 /* keep queue files always */ 222 #define EF_RESPONSE 000200 /* this is an error or return receipt */ 223 #define EF_RESENT 000400 /* this message is being forwarded */ 224 225 EXTERN ENVELOPE *CurEnv; /* envelope currently being processed */ 226 /* 227 ** Message priorities. 228 ** Priorities > 0 should be preemptive. 229 ** 230 ** CurEnv->e_msgpriority is the number of bytes in the message adjusted 231 ** by the message priority and the amount of time the message 232 ** has been sitting around. Each priority point is worth 233 ** WKPRIFACT bytes of message, and each time we reprocess a 234 ** message the size gets reduced by WKTIMEFACT. 235 ** 236 ** WKTIMEFACT is negative since jobs that fail once have a high 237 ** probability of failing again. Making it negative tends to force 238 ** them to the back rather than the front of the queue, where they 239 ** only clog things. Thanks go to Jay Lepreau at Utah for pointing 240 ** out the error in my thinking. 241 ** 242 ** The "class" is this number, unadjusted by the age or size of 243 ** this message. Classes with negative representations will have 244 ** error messages thrown away if they are not local. 245 */ 246 247 struct priority 248 { 249 char *pri_name; /* external name of priority */ 250 int pri_val; /* internal value for same */ 251 }; 252 253 EXTERN struct priority Priorities[MAXPRIORITIES]; 254 EXTERN int NumPriorities; /* pointer into Priorities */ 255 256 # define WKPRIFACT 1800 /* bytes each pri point is worth */ 257 # define WKTIMEFACT (-600) /* bytes each reprocessing is worth */ 258 /* 259 ** Rewrite rules. 260 */ 261 262 struct rewrite 263 { 264 char **r_lhs; /* pattern match */ 265 char **r_rhs; /* substitution value */ 266 struct rewrite *r_next;/* next in chain */ 267 }; 268 269 EXTERN struct rewrite *RewriteRules[MAXRWSETS]; 270 271 /* 272 ** Special characters in rewriting rules. 273 ** These are used internally only. 274 ** The COND* rules are actually used in macros rather than in 275 ** rewriting rules, but are given here because they 276 ** cannot conflict. 277 */ 278 279 /* left hand side items */ 280 # define MATCHZANY '\020' /* match zero or more tokens */ 281 # define MATCHANY '\021' /* match one or more tokens */ 282 # define MATCHONE '\022' /* match exactly one token */ 283 # define MATCHCLASS '\023' /* match one token in a class */ 284 # define MATCHNCLASS '\024' /* match anything not in class */ 285 # define MATCHREPL '\025' /* replacement on RHS for above */ 286 287 /* right hand side items */ 288 # define CANONNET '\026' /* canonical net, next token */ 289 # define CANONHOST '\027' /* canonical host, next token */ 290 # define CANONUSER '\030' /* canonical user, next N tokens */ 291 # define CALLSUBR '\031' /* call another rewriting set */ 292 293 /* conditionals in macros */ 294 # define CONDIF '\032' /* conditional if-then */ 295 # define CONDELSE '\033' /* conditional else */ 296 # define CONDFI '\034' /* conditional fi */ 297 298 /* bracket characters for host name lookup */ 299 # define HOSTBEGIN '\035' /* hostname lookup begin */ 300 # define HOSTEND '\036' /* hostname lookup end */ 301 302 /* \001 is also reserved as the macro expansion character */ 303 /* 304 ** Symbol table definitions 305 */ 306 307 struct symtab 308 { 309 char *s_name; /* name to be entered */ 310 char s_type; /* general type (see below) */ 311 struct symtab *s_next; /* pointer to next in chain */ 312 union 313 { 314 BITMAP sv_class; /* bit-map of word classes */ 315 ADDRESS *sv_addr; /* pointer to address header */ 316 MAILER *sv_mailer; /* pointer to mailer */ 317 char *sv_alias; /* alias */ 318 } s_value; 319 }; 320 321 typedef struct symtab STAB; 322 323 /* symbol types */ 324 # define ST_UNDEF 0 /* undefined type */ 325 # define ST_CLASS 1 /* class map */ 326 # define ST_ADDRESS 2 /* an address in parsed format */ 327 # define ST_MAILER 3 /* a mailer header */ 328 # define ST_ALIAS 4 /* an alias */ 329 330 # define s_class s_value.sv_class 331 # define s_address s_value.sv_addr 332 # define s_mailer s_value.sv_mailer 333 # define s_alias s_value.sv_alias 334 335 extern STAB *stab(); 336 337 /* opcodes to stab */ 338 # define ST_FIND 0 /* find entry */ 339 # define ST_ENTER 1 /* enter if not there */ 340 /* 341 ** STRUCT EVENT -- event queue. 342 ** 343 ** Maintained in sorted order. 344 ** 345 ** We store the pid of the process that set this event to insure 346 ** that when we fork we will not take events intended for the parent. 347 */ 348 349 struct event 350 { 351 time_t ev_time; /* time of the function call */ 352 int (*ev_func)(); /* function to call */ 353 int ev_arg; /* argument to ev_func */ 354 int ev_pid; /* pid that set this event */ 355 struct event *ev_link; /* link to next item */ 356 }; 357 358 typedef struct event EVENT; 359 360 EXTERN EVENT *EventQueue; /* head of event queue */ 361 /* 362 ** Operation, send, and error modes 363 ** 364 ** The operation mode describes the basic operation of sendmail. 365 ** This can be set from the command line, and is "send mail" by 366 ** default. 367 ** 368 ** The send mode tells how to send mail. It can be set in the 369 ** configuration file. It's setting determines how quickly the 370 ** mail will be delivered versus the load on your system. If the 371 ** -v (verbose) flag is given, it will be forced to SM_DELIVER 372 ** mode. 373 ** 374 ** The error mode tells how to return errors. 375 */ 376 377 EXTERN char OpMode; /* operation mode, see below */ 378 379 #define MD_DELIVER 'm' /* be a mail sender */ 380 #define MD_ARPAFTP 'a' /* old-style arpanet protocols */ 381 #define MD_SMTP 's' /* run SMTP on standard input */ 382 #define MD_DAEMON 'd' /* run as a daemon */ 383 #define MD_VERIFY 'v' /* verify: don't collect or deliver */ 384 #define MD_TEST 't' /* test mode: resolve addrs only */ 385 #define MD_INITALIAS 'i' /* initialize alias database */ 386 #define MD_PRINT 'p' /* print the queue */ 387 #define MD_FREEZE 'z' /* freeze the configuration file */ 388 389 390 EXTERN char SendMode; /* send mode, see below */ 391 392 #define SM_DELIVER 'i' /* interactive delivery */ 393 #define SM_QUICKD 'j' /* deliver w/o queueing */ 394 #define SM_FORK 'b' /* deliver in background */ 395 #define SM_QUEUE 'q' /* queue, don't deliver */ 396 #define SM_VERIFY 'v' /* verify only (used internally) */ 397 398 /* used only as a parameter to sendall */ 399 #define SM_DEFAULT '\0' /* unspecified, use SendMode */ 400 401 402 EXTERN char ErrorMode; /* error mode, see below */ 403 404 #define EM_PRINT 'p' /* print errors */ 405 #define EM_MAIL 'm' /* mail back errors */ 406 #define EM_WRITE 'w' /* write back errors */ 407 #define EM_BERKNET 'e' /* special berknet processing */ 408 #define EM_QUIET 'q' /* don't print messages (stat only) */ 409 /* 410 ** Global variables. 411 */ 412 413 EXTERN bool FromFlag; /* if set, "From" person is explicit */ 414 EXTERN bool NoAlias; /* if set, don't do any aliasing */ 415 EXTERN bool ForceMail; /* if set, mail even if already got a copy */ 416 EXTERN bool MeToo; /* send to the sender also */ 417 EXTERN bool IgnrDot; /* don't let dot end messages */ 418 EXTERN bool SaveFrom; /* save leading "From" lines */ 419 EXTERN bool Verbose; /* set if blow-by-blow desired */ 420 EXTERN bool GrabTo; /* if set, get recipients from msg */ 421 EXTERN bool NoReturn; /* don't return letter to sender */ 422 EXTERN bool SuprErrs; /* set if we are suppressing errors */ 423 EXTERN bool QueueRun; /* currently running message from the queue */ 424 EXTERN bool HoldErrs; /* only output errors to transcript */ 425 EXTERN bool NoConnect; /* don't connect to non-local mailers */ 426 EXTERN bool SuperSafe; /* be extra careful, even if expensive */ 427 EXTERN bool SafeAlias; /* alias file must have "@:@" to be complete */ 428 EXTERN bool AutoRebuild; /* auto-rebuild the alias database as needed */ 429 EXTERN time_t TimeOut; /* time until timeout */ 430 EXTERN FILE *InChannel; /* input connection */ 431 EXTERN FILE *OutChannel; /* output connection */ 432 EXTERN int RealUid; /* when Daemon, real uid of caller */ 433 EXTERN int RealGid; /* when Daemon, real gid of caller */ 434 EXTERN int DefUid; /* default uid to run as */ 435 EXTERN int DefGid; /* default gid to run as */ 436 EXTERN int OldUmask; /* umask when sendmail starts up */ 437 EXTERN int Errors; /* set if errors (local to single pass) */ 438 EXTERN int ExitStat; /* exit status code */ 439 EXTERN int AliasLevel; /* depth of aliasing */ 440 EXTERN int MotherPid; /* proc id of parent process */ 441 EXTERN int LineNumber; /* line number in current input */ 442 EXTERN time_t ReadTimeout; /* timeout on reads */ 443 EXTERN int LogLevel; /* level of logging to perform */ 444 EXTERN int FileMode; /* mode on files */ 445 EXTERN time_t QueueIntvl; /* intervals between running the queue */ 446 EXTERN char *HostName; /* name of this host for SMTP messages */ 447 EXTERN char *AliasFile; /* location of alias file */ 448 EXTERN char *HelpFile; /* location of SMTP help file */ 449 EXTERN char *StatFile; /* location of statistics summary */ 450 EXTERN char *QueueDir; /* location of queue directory */ 451 EXTERN char *FileName; /* name to print on error messages */ 452 EXTERN char *TrustedUsers[MAXTRUST+1]; /* list of trusted users */ 453 EXTERN jmp_buf TopFrame; /* branch-to-top-of-loop-on-error frame */ 454 EXTERN bool QuickAbort; /* .... but only if we want a quick abort */ 455 extern char *ConfFile; /* location of configuration file [conf.c] */ 456 extern char *FreezeFile; /* location of frozen memory image [conf.c] */ 457 extern char Arpa_Info[]; /* the reply code for Arpanet info [conf.c] */ 458 extern char SpaceSub; /* substitution for <lwsp> [conf.c] */ 459 /* 460 ** Trace information 461 */ 462 463 /* trace vector and macros for debugging flags */ 464 EXTERN u_char tTdvect[100]; 465 # define tTd(flag, level) (tTdvect[flag] >= level) 466 # define tTdlevel(flag) (tTdvect[flag]) 467 /* 468 ** Miscellaneous information. 469 */ 470 471 # include <sysexits.h> 472 473 474 /* 475 ** Some in-line functions 476 */ 477 478 /* set exit status */ 479 #define setstat(s) { \ 480 if (ExitStat == EX_OK || ExitStat == EX_TEMPFAIL) \ 481 ExitStat = s; \ 482 } 483 484 /* make a copy of a string */ 485 #define newstr(s) strcpy(xalloc(strlen(s) + 1), s) 486 487 488 /* 489 ** Declarations of useful functions 490 */ 491 492 extern ADDRESS *parseaddr(); 493 extern char *xalloc(); 494 extern bool sameaddr(); 495 extern FILE *dfopen(); 496 extern EVENT *setevent(); 497 extern char *sfgets(); 498 extern char *queuename(); 499 extern time_t curtime(); 500