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 3.81 08/23/82"; 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 "useful.h" 20 21 # ifdef LOG 22 # include <syslog.h> 23 # endif LOG 24 /* 25 ** Configuration constants. 26 ** There shouldn't be much need to change these.... 27 */ 28 29 # define MAXLINE 256 /* max line length */ 30 # define MAXNAME 128 /* max length of a name */ 31 # define MAXFIELD 2500 /* max total length of a hdr field */ 32 # define MAXPV 40 /* max # of parms to mailers */ 33 # define MAXHOP 30 /* max value of HopCount */ 34 # define MAXATOM 100 /* max atoms per address */ 35 # define MAXMAILERS 10 /* maximum mailers known to system */ 36 # define SPACESUB ('.'|0200) /* substitution for <lwsp> */ 37 /* 38 ** Address structure. 39 ** Addresses are stored internally in this structure. 40 */ 41 42 struct address 43 { 44 char *q_paddr; /* the printname for the address */ 45 char *q_user; /* user name */ 46 char *q_host; /* host name */ 47 struct mailer *q_mailer; /* mailer to use */ 48 short q_rmailer; /* real mailer (before mapping) */ 49 u_short q_flags; /* status flags, see below */ 50 short q_uid; /* user-id of receiver (if known) */ 51 short q_gid; /* group-id of receiver (if known) */ 52 char *q_home; /* home dir (local mailer only) */ 53 char *q_fullname; /* full name if known */ 54 struct address *q_next; /* chain */ 55 struct address *q_alias; /* address this results from */ 56 struct address *q_tchain; /* temporary use chain */ 57 time_t q_timeout; /* timeout for this address */ 58 }; 59 60 typedef struct address ADDRESS; 61 62 # define QDONTSEND 000001 /* don't send to this address */ 63 # define QBADADDR 000002 /* this address is verified bad */ 64 # define QGOODUID 000004 /* the q_uid q_gid fields are good */ 65 # define QPRIMARY 000010 /* set from argv */ 66 # define QQUEUEUP 000020 /* queue for later transmission */ 67 /* 68 ** Mailer definition structure. 69 ** Every mailer known to the system is declared in this 70 ** structure. It defines the pathname of the mailer, some 71 ** flags associated with it, and the argument vector to 72 ** pass to it. The flags are defined in conf.c 73 ** 74 ** The argument vector is expanded before actual use. All 75 ** words except the first are passed through the macro 76 ** processor. 77 */ 78 79 struct mailer 80 { 81 char *m_name; /* symbolic name of this mailer */ 82 char *m_mailer; /* pathname of the mailer to use */ 83 u_long m_flags; /* status flags, see below */ 84 short m_badstat; /* the status code to use on unknown error */ 85 short m_mno; /* mailer number internally */ 86 char *m_from; /* pattern for From: header */ 87 char **m_argv; /* template argument vector */ 88 }; 89 90 typedef struct mailer MAILER; 91 92 /* bits for m_flags */ 93 # define M_FOPT 000000001L /* mailer takes picky -f flag */ 94 # define M_ROPT 000000002L /* mailer takes picky -r flag */ 95 # define M_QUIET 000000004L /* don't print error on bad status */ 96 # define M_RESTR 000000010L /* must be daemon to execute */ 97 # define M_NHDR 000000020L /* don't insert From line */ 98 # define M_LOCAL 000000040L /* delivery is to this host */ 99 # define M_STRIPQ 000000100L /* strip quote chars from user/host */ 100 # define M_MUSER 000000200L /* can handle multiple users at once */ 101 # define M_NEEDFROM 000000400L /* need arpa-style From: line */ 102 # define M_NEEDDATE 000001000L /* need arpa-style Date: line */ 103 # define M_MSGID 000002000L /* need Message-Id: field */ 104 # define M_RELRCPT 000004000L /* make recipient addresses relative */ 105 # define M_USR_UPPER 000010000L /* preserve user case distinction */ 106 # define M_HST_UPPER 000020000L /* preserve host case distinction */ 107 # define M_FULLNAME 000040000L /* want Full-Name field */ 108 # define M_UGLYUUCP 000100000L /* this wants an ugly UUCP from line */ 109 # define M_EXPENSIVE 000200000L /* it costs to use this mailer.... */ 110 # define M_FULLSMTP 000400000L /* must run full SMTP, inc. limits */ 111 112 # define M_ARPAFMT (M_NEEDDATE|M_NEEDFROM|M_MSGID) 113 114 EXTERN MAILER *Mailer[MAXMAILERS+1]; 115 116 EXTERN MAILER *LocalMailer; /* ptr to local mailer */ 117 EXTERN MAILER *ProgMailer; /* ptr to program mailer */ 118 /* 119 ** Header structure. 120 ** This structure is used internally to store header items. 121 */ 122 123 struct header 124 { 125 char *h_field; /* the name of the field */ 126 char *h_value; /* the value of that field */ 127 struct header *h_link; /* the next header */ 128 u_short h_flags; /* status bits, see below */ 129 u_long h_mflags; /* m_flags bits needed */ 130 }; 131 132 typedef struct header HDR; 133 134 /* 135 ** Header information structure. 136 ** Defined in conf.c, this struct declares the header fields 137 ** that have some magic meaning. 138 */ 139 140 struct hdrinfo 141 { 142 char *hi_field; /* the name of the field */ 143 u_short hi_flags; /* status bits, see below */ 144 u_short hi_mflags; /* m_flags needed for this field */ 145 }; 146 147 extern struct hdrinfo HdrInfo[]; 148 149 /* bits for h_flags and hi_flags */ 150 # define H_EOH 00001 /* this field terminates header */ 151 # define H_RCPT 00002 /* contains recipient addresses */ 152 # define H_DEFAULT 00004 /* if another value is found, drop this */ 153 # define H_USED 00010 /* indicates that this has been output */ 154 # define H_CHECK 00020 /* check h_mflags against m_flags */ 155 # define H_ACHECK 00040 /* ditto, but always (not just default) */ 156 # define H_FORCE 00100 /* force this field, even if default */ 157 # define H_ADDR 00200 /* this field contains addresses */ 158 # define H_FROM 00400 /* this is a from-type field */ 159 /* 160 ** Envelope structure. 161 ** This structure defines the message itself. There is usually 162 ** only one of these -- for the message that we originally read 163 ** and which is our primary interest -- but other envelopes can 164 ** be generated during processing. For example, error messages 165 ** will have their own envelope. 166 */ 167 168 struct envelope 169 { 170 HDR *e_header; /* head of header list */ 171 long e_msgpriority; /* adjusted priority of this message */ 172 time_t e_ctime; /* time message appeared in the queue */ 173 bool e_queueup; /* queue this message */ 174 bool e_dontqueue; /* override queueing */ 175 bool e_oldstyle; /* use spaces (not commas) in hdrs */ 176 bool e_retreceipt; /* give a return receipt */ 177 bool e_sendreceipt; /* actually send a receipt back */ 178 char *e_origfrom; /* the From: line first read */ 179 char *e_to; /* the target person */ 180 ADDRESS e_from; /* the person it is from */ 181 ADDRESS *e_sendqueue; /* list of message recipients */ 182 ADDRESS *e_errorqueue; /* the queue for error responses */ 183 long e_msgsize; /* size of the message in bytes */ 184 short e_class; /* msg class (priority, junk, etc.) */ 185 int (*e_puthdr)(); /* function to put header of message */ 186 int (*e_putbody)(); /* function to put body of message */ 187 struct envelope *e_parent; /* the message this one encloses */ 188 char *e_df; /* location of temp file */ 189 char *e_qf; /* queue control file */ 190 char *e_id; /* code for this entry in queue */ 191 char *e_macro[128]; /* macro definitions */ 192 }; 193 194 typedef struct envelope ENVELOPE; 195 196 EXTERN ENVELOPE *CurEnv; /* envelope currently being processed */ 197 /* 198 ** Work queue. 199 */ 200 201 struct work 202 { 203 char *w_name; /* name of control file */ 204 long w_pri; /* priority of message, see below */ 205 struct work *w_next; /* next in queue */ 206 }; 207 208 typedef struct work WORK; 209 210 EXTERN WORK *WorkQ; /* queue of things to be done */ 211 212 213 /* 214 ** Message priorities. 215 ** Priorities > 0 should be preemptive. 216 ** 217 ** CurEnv->e_msgpriority is the number of bytes in the message adjusted 218 ** by the message priority and the amount of time the message 219 ** has been sitting around. Each priority point is worth 220 ** WKPRIFACT bytes of message, and each time we reprocess a 221 ** message the size gets reduced by WKTIMEFACT. 222 ** 223 ** The "class" is this number, unadjusted by the age or size of 224 ** this message. Classes with negative representations will have 225 ** error messages thrown away if they are not local. 226 */ 227 228 # define PRI_ALERT 50 229 # define PRI_QUICK 30 230 # define PRI_FIRSTCL 10 231 # define PRI_NORMAL 0 232 # define PRI_SECONDCL -10 233 # define PRI_THIRDCL -40 234 # define PRI_JUNK -100 235 236 # define WKPRIFACT 1800 /* bytes each pri point is worth */ 237 # define WKTIMEFACT 400 /* bytes each time unit is worth */ 238 /* 239 ** Rewrite rules. 240 */ 241 242 struct rewrite 243 { 244 char **r_lhs; /* pattern match */ 245 char **r_rhs; /* substitution value */ 246 struct rewrite *r_next;/* next in chain */ 247 }; 248 249 extern struct rewrite *RewriteRules[]; 250 251 # define MATCHANY '\020' /* match one or more tokens */ 252 # define MATCHONE '\021' /* match exactly one token */ 253 # define MATCHCLASS '\022' /* match one token in a class */ 254 # define MATCHREPL '\023' /* replacement on RHS for above */ 255 256 # define CANONNET '\025' /* canonical net, next token */ 257 # define CANONHOST '\026' /* canonical host, next token */ 258 # define CANONUSER '\027' /* canonical user, next N tokens */ 259 260 # define CONDIF '\030' /* conditional if-then */ 261 # define CONDELSE '\031' /* conditional else */ 262 # define CONDFI '\032' /* conditional fi */ 263 /* 264 ** Symbol table definitions 265 */ 266 267 struct symtab 268 { 269 char *s_name; /* name to be entered */ 270 char s_type; /* general type (see below) */ 271 struct symtab *s_next; /* pointer to next in chain */ 272 union 273 { 274 long sv_class; /* bit-map of word classes */ 275 ADDRESS *sv_addr; /* pointer to address header */ 276 MAILER *sv_mailer; /* pointer to mailer */ 277 char *sv_alias; /* alias */ 278 } s_value; 279 }; 280 281 typedef struct symtab STAB; 282 283 /* symbol types */ 284 # define ST_UNDEF 0 /* undefined type */ 285 # define ST_CLASS 1 /* class map */ 286 # define ST_ADDRESS 2 /* an address in parsed format */ 287 # define ST_MAILER 3 /* a mailer header */ 288 # define ST_ALIAS 4 /* an alias */ 289 290 # define s_class s_value.sv_class 291 # define s_address s_value.sv_addr 292 # define s_mailer s_value.sv_mailer 293 # define s_alias s_value.sv_alias 294 295 extern STAB *stab(); 296 297 /* opcodes to stab */ 298 # define ST_FIND 0 /* find entry */ 299 # define ST_ENTER 1 /* enter if not there */ 300 /* 301 ** STRUCT EVENT -- event queue. 302 ** 303 ** Maintained in sorted order. 304 */ 305 306 struct event 307 { 308 time_t ev_time; /* time of the function call */ 309 int (*ev_func)(); /* function to call */ 310 int ev_arg; /* argument to ev_func */ 311 struct event *ev_link; /* link to next item */ 312 }; 313 314 typedef struct event EVENT; 315 316 EXTERN EVENT *EventQueue; /* head of event queue */ 317 /* 318 ** Statistics structure. 319 */ 320 321 struct statistics 322 { 323 time_t stat_itime; /* file initialization time */ 324 short stat_size; /* size of this structure */ 325 long stat_nf[MAXMAILERS]; /* # msgs from each mailer */ 326 long stat_bf[MAXMAILERS]; /* kbytes from each mailer */ 327 long stat_nt[MAXMAILERS]; /* # msgs to each mailer */ 328 long stat_bt[MAXMAILERS]; /* kbytes to each mailer */ 329 }; 330 331 EXTERN struct statistics Stat; 332 extern long kbytes(); /* for _bf, _bt */ 333 /* 334 ** Operation modes 335 ** The default operation mode can be safely changed (except 336 ** that the default cannot be MD_DAEMON). 337 */ 338 339 EXTERN char Mode; /* operation mode, see below */ 340 341 #define MD_DELIVER 'a' /* collect and deliver */ 342 #define MD_FORK 'f' /* verify & fork before delivery */ 343 #define MD_QUEUE 'q' /* collect & queue, don't deliver */ 344 #define MD_DAEMON 'd' /* run as a daemon */ 345 #define MD_VERIFY 'v' /* verify: don't collect or deliver */ 346 347 #define MD_DEFAULT MD_DELIVER /* default operation mode */ 348 /* 349 ** Global variables. 350 */ 351 352 EXTERN bool FromFlag; /* if set, "From" person is explicit */ 353 EXTERN bool MailBack; /* mail back response on error */ 354 EXTERN bool BerkNet; /* called from BerkNet */ 355 EXTERN bool WriteBack; /* write back response on error */ 356 EXTERN bool NoAlias; /* if set, don't do any aliasing */ 357 EXTERN bool ForceMail; /* if set, mail even if already got a copy */ 358 EXTERN bool MeToo; /* send to the sender also */ 359 EXTERN bool IgnrDot; /* don't let dot end messages */ 360 EXTERN bool SaveFrom; /* save leading "From" lines */ 361 EXTERN bool Verbose; /* set if blow-by-blow desired */ 362 EXTERN bool GrabTo; /* if set, get recipients from msg */ 363 EXTERN bool DontSend; /* mark recipients as QDONTSEND */ 364 EXTERN bool NoReturn; /* don't return letter to sender */ 365 EXTERN bool Smtp; /* using SMTP over connection */ 366 EXTERN bool SuprErrs; /* set if we are suppressing errors */ 367 EXTERN bool QueueRun; /* currently running message from the queue */ 368 EXTERN bool HoldErrs; /* only output errors to transcript */ 369 EXTERN bool ArpaMode; /* set if running arpanet protocol */ 370 EXTERN bool NoConnect; /* don't connect to non-local mailers */ 371 EXTERN bool FatalErrors; /* set if fatal errors during processing */ 372 extern time_t TimeOut; /* time until timeout [conf.c] */ 373 EXTERN FILE *InChannel; /* input connection */ 374 EXTERN FILE *OutChannel; /* output connection */ 375 EXTERN FILE *TempFile; /* mail temp file */ 376 EXTERN FILE *Xscript; /* mail transcript file */ 377 EXTERN int RealUid; /* when Daemon, real uid of caller */ 378 EXTERN int RealGid; /* when Daemon, real gid of caller */ 379 extern int DefUid; /* default uid to run as [conf.c] */ 380 extern int DefGid; /* default gid to run as [conf.c] */ 381 EXTERN int OldUmask; /* umask when sendmail starts up */ 382 EXTERN int Errors; /* set if errors (local to single pass) */ 383 EXTERN int ExitStat; /* exit status code */ 384 EXTERN int HopCount; /* hop count */ 385 EXTERN int AliasLevel; /* depth of aliasing */ 386 EXTERN int MotherPid; /* proc id of parent process */ 387 EXTERN time_t QueueIntvl; /* intervals between running the queue */ 388 EXTERN char *HostName; /* name of this host for SMTP messages */ 389 EXTERN char *Transcript; /* the transcript file name */ 390 extern char *XcriptFile; /* template for Transcript [conf.c] */ 391 extern char *AliasFile; /* location of alias file [conf.c] */ 392 extern char *ConfFile; /* location of configuration file [conf.c] */ 393 extern char *StatFile; /* location of statistics summary [conf.c] */ 394 extern char *QueueDir; /* location of queue directory [conf.c] */ 395 extern char Arpa_Info[]; /* the reply code for Arpanet info [conf.c] */ 396 EXTERN time_t CurTime; /* time of this message */ 397 EXTERN jmp_buf TopFrame; /* branch-to-top-of-loop-on-error frame */ 398 EXTERN bool QuickAbort; /* .... but only if we want a quick abort */ 399 extern int ReadTimeout; /* timeout on reads [conf.c] */ 400 extern int LogLevel; /* level of logging to perform [conf.c] */ 401 /* 402 ** Trace information 403 */ 404 405 /* trace vector and macros for debugging flags */ 406 EXTERN u_char tTdvect[100]; 407 # define tTd(flag, level) (tTdvect[flag] >= level) 408 # define tTdlevel(flag) (tTdvect[flag]) 409 /* 410 ** Miscellaneous information. 411 */ 412 413 # include <sysexits.h> 414 415 # define setstat(s) { if (ExitStat == EX_OK) ExitStat = s; } 416 417 418 /* useful functions */ 419 420 extern char *newstr(); 421 extern ADDRESS *parse(); 422 extern char *xalloc(); 423 extern bool sameaddr(); 424 extern FILE *dfopen(); 425 extern EVENT *setevent(); 426 extern char *sfgets(); 427 extern char *queuename(); 428