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 9 #ifndef lint 10 static char sccsid[] = "@(#)parseaddr.c 8.24 (Berkeley) 12/11/93"; 11 #endif /* not lint */ 12 13 # include "sendmail.h" 14 15 /* 16 ** PARSEADDR -- Parse an address 17 ** 18 ** Parses an address and breaks it up into three parts: a 19 ** net to transmit the message on, the host to transmit it 20 ** to, and a user on that host. These are loaded into an 21 ** ADDRESS header with the values squirreled away if necessary. 22 ** The "user" part may not be a real user; the process may 23 ** just reoccur on that machine. For example, on a machine 24 ** with an arpanet connection, the address 25 ** csvax.bill@berkeley 26 ** will break up to a "user" of 'csvax.bill' and a host 27 ** of 'berkeley' -- to be transmitted over the arpanet. 28 ** 29 ** Parameters: 30 ** addr -- the address to parse. 31 ** a -- a pointer to the address descriptor buffer. 32 ** If NULL, a header will be created. 33 ** flags -- describe detail for parsing. See RF_ definitions 34 ** in sendmail.h. 35 ** delim -- the character to terminate the address, passed 36 ** to prescan. 37 ** delimptr -- if non-NULL, set to the location of the 38 ** delim character that was found. 39 ** e -- the envelope that will contain this address. 40 ** 41 ** Returns: 42 ** A pointer to the address descriptor header (`a' if 43 ** `a' is non-NULL). 44 ** NULL on error. 45 ** 46 ** Side Effects: 47 ** none 48 */ 49 50 /* following delimiters are inherent to the internal algorithms */ 51 # define DELIMCHARS "()<>,;\r\n" /* default word delimiters */ 52 53 ADDRESS * 54 parseaddr(addr, a, flags, delim, delimptr, e) 55 char *addr; 56 register ADDRESS *a; 57 int flags; 58 int delim; 59 char **delimptr; 60 register ENVELOPE *e; 61 { 62 register char **pvp; 63 auto char *delimptrbuf; 64 bool queueup; 65 char pvpbuf[PSBUFSIZE]; 66 extern ADDRESS *buildaddr(); 67 extern bool invalidaddr(); 68 69 /* 70 ** Initialize and prescan address. 71 */ 72 73 e->e_to = addr; 74 if (tTd(20, 1)) 75 printf("\n--parseaddr(%s)\n", addr); 76 77 if (delimptr == NULL) 78 delimptr = &delimptrbuf; 79 80 pvp = prescan(addr, delim, pvpbuf, sizeof pvpbuf, delimptr); 81 if (pvp == NULL) 82 { 83 if (tTd(20, 1)) 84 printf("parseaddr-->NULL\n"); 85 return (NULL); 86 } 87 88 if (invalidaddr(addr, delim == '\0' ? NULL : *delimptr)) 89 { 90 if (tTd(20, 1)) 91 printf("parseaddr-->bad address\n"); 92 return NULL; 93 } 94 95 /* 96 ** Save addr if we are going to have to. 97 ** 98 ** We have to do this early because there is a chance that 99 ** the map lookups in the rewriting rules could clobber 100 ** static memory somewhere. 101 */ 102 103 if (bitset(RF_COPYPADDR, flags) && addr != NULL) 104 { 105 char savec = **delimptr; 106 107 if (savec != '\0') 108 **delimptr = '\0'; 109 addr = newstr(addr); 110 if (savec != '\0') 111 **delimptr = savec; 112 } 113 114 /* 115 ** Apply rewriting rules. 116 ** Ruleset 0 does basic parsing. It must resolve. 117 */ 118 119 queueup = FALSE; 120 if (rewrite(pvp, 3, 0, e) == EX_TEMPFAIL) 121 queueup = TRUE; 122 if (rewrite(pvp, 0, 0, e) == EX_TEMPFAIL) 123 queueup = TRUE; 124 125 126 /* 127 ** Build canonical address from pvp. 128 */ 129 130 a = buildaddr(pvp, a, flags, e); 131 132 /* 133 ** Make local copies of the host & user and then 134 ** transport them out. 135 */ 136 137 allocaddr(a, flags, addr); 138 if (bitset(QBADADDR, a->q_flags)) 139 return a; 140 141 /* 142 ** If there was a parsing failure, mark it for queueing. 143 */ 144 145 if (queueup) 146 { 147 char *msg = "Transient parse error -- message queued for future delivery"; 148 149 if (tTd(20, 1)) 150 printf("parseaddr: queuing message\n"); 151 message(msg); 152 if (e->e_message == NULL) 153 e->e_message = newstr(msg); 154 a->q_flags |= QQUEUEUP; 155 } 156 157 /* 158 ** Compute return value. 159 */ 160 161 if (tTd(20, 1)) 162 { 163 printf("parseaddr-->"); 164 printaddr(a, FALSE); 165 } 166 167 return (a); 168 } 169 /* 170 ** INVALIDADDR -- check for address containing meta-characters 171 ** 172 ** Parameters: 173 ** addr -- the address to check. 174 ** 175 ** Returns: 176 ** TRUE -- if the address has any "wierd" characters 177 ** FALSE -- otherwise. 178 */ 179 180 bool 181 invalidaddr(addr, delimptr) 182 register char *addr; 183 char *delimptr; 184 { 185 char savedelim; 186 187 if (delimptr != NULL) 188 { 189 savedelim = *delimptr; 190 if (savedelim != '\0') 191 *delimptr = '\0'; 192 } 193 #if 0 194 /* for testing.... */ 195 if (strcmp(addr, "INvalidADDR") == 0) 196 { 197 usrerr("553 INvalid ADDRess"); 198 goto addrfailure; 199 } 200 #endif 201 for (; *addr != '\0'; addr++) 202 { 203 if ((*addr & 0340) == 0200) 204 break; 205 } 206 if (*addr == '\0') 207 { 208 if (savedelim != '\0' && delimptr != NULL) 209 *delimptr = savedelim; 210 return FALSE; 211 } 212 setstat(EX_USAGE); 213 usrerr("553 Address contained invalid control characters"); 214 addrfailure: 215 if (savedelim != '\0' && delimptr != NULL) 216 *delimptr = savedelim; 217 return TRUE; 218 } 219 /* 220 ** ALLOCADDR -- do local allocations of address on demand. 221 ** 222 ** Also lowercases the host name if requested. 223 ** 224 ** Parameters: 225 ** a -- the address to reallocate. 226 ** flags -- the copy flag (see RF_ definitions in sendmail.h 227 ** for a description). 228 ** paddr -- the printname of the address. 229 ** 230 ** Returns: 231 ** none. 232 ** 233 ** Side Effects: 234 ** Copies portions of a into local buffers as requested. 235 */ 236 237 allocaddr(a, flags, paddr) 238 register ADDRESS *a; 239 int flags; 240 char *paddr; 241 { 242 if (tTd(24, 4)) 243 printf("allocaddr(flags=%o, paddr=%s)\n", flags, paddr); 244 245 a->q_paddr = paddr; 246 247 if (a->q_user == NULL) 248 a->q_user = ""; 249 if (a->q_host == NULL) 250 a->q_host = ""; 251 252 if (bitset(RF_COPYPARSE, flags)) 253 { 254 a->q_host = newstr(a->q_host); 255 if (a->q_user != a->q_paddr) 256 a->q_user = newstr(a->q_user); 257 } 258 259 if (a->q_paddr == NULL) 260 a->q_paddr = a->q_user; 261 } 262 /* 263 ** PRESCAN -- Prescan name and make it canonical 264 ** 265 ** Scans a name and turns it into a set of tokens. This process 266 ** deletes blanks and comments (in parentheses). 267 ** 268 ** This routine knows about quoted strings and angle brackets. 269 ** 270 ** There are certain subtleties to this routine. The one that 271 ** comes to mind now is that backslashes on the ends of names 272 ** are silently stripped off; this is intentional. The problem 273 ** is that some versions of sndmsg (like at LBL) set the kill 274 ** character to something other than @ when reading addresses; 275 ** so people type "csvax.eric\@berkeley" -- which screws up the 276 ** berknet mailer. 277 ** 278 ** Parameters: 279 ** addr -- the name to chomp. 280 ** delim -- the delimiter for the address, normally 281 ** '\0' or ','; \0 is accepted in any case. 282 ** If '\t' then we are reading the .cf file. 283 ** pvpbuf -- place to put the saved text -- note that 284 ** the pointers are static. 285 ** pvpbsize -- size of pvpbuf. 286 ** delimptr -- if non-NULL, set to the location of the 287 ** terminating delimiter. 288 ** 289 ** Returns: 290 ** A pointer to a vector of tokens. 291 ** NULL on error. 292 */ 293 294 /* states and character types */ 295 # define OPR 0 /* operator */ 296 # define ATM 1 /* atom */ 297 # define QST 2 /* in quoted string */ 298 # define SPC 3 /* chewing up spaces */ 299 # define ONE 4 /* pick up one character */ 300 301 # define NSTATES 5 /* number of states */ 302 # define TYPE 017 /* mask to select state type */ 303 304 /* meta bits for table */ 305 # define M 020 /* meta character; don't pass through */ 306 # define B 040 /* cause a break */ 307 # define MB M|B /* meta-break */ 308 309 static short StateTab[NSTATES][NSTATES] = 310 { 311 /* oldst chtype> OPR ATM QST SPC ONE */ 312 /*OPR*/ OPR|B, ATM|B, QST|B, SPC|MB, ONE|B, 313 /*ATM*/ OPR|B, ATM, QST|B, SPC|MB, ONE|B, 314 /*QST*/ QST, QST, OPR, QST, QST, 315 /*SPC*/ OPR, ATM, QST, SPC|M, ONE, 316 /*ONE*/ OPR, OPR, OPR, OPR, OPR, 317 }; 318 319 /* token type table -- it gets modified with $o characters */ 320 static TokTypeTab[256] = 321 { 322 ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,SPC,SPC,SPC,SPC,SPC,ATM,ATM, 323 ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, 324 SPC,ATM,QST,ATM,ATM,ATM,ATM,ATM,ATM,SPC,ATM,ATM,ATM,ATM,ATM,ATM, 325 ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, 326 ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, 327 ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, 328 ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, 329 ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, 330 OPR,OPR,ONE,OPR,OPR,OPR,OPR,OPR,OPR,OPR,OPR,OPR,OPR,OPR,OPR,OPR, 331 OPR,OPR,OPR,ONE,ONE,ONE,OPR,OPR,OPR,OPR,OPR,OPR,OPR,OPR,OPR,OPR, 332 ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, 333 ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, 334 ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, 335 ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, 336 ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, 337 ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, 338 }; 339 340 #define toktype(c) ((int) TokTypeTab[(c) & 0xff]) 341 342 343 # define NOCHAR -1 /* signal nothing in lookahead token */ 344 345 char ** 346 prescan(addr, delim, pvpbuf, pvpbsize, delimptr) 347 char *addr; 348 char delim; 349 char pvpbuf[]; 350 char **delimptr; 351 { 352 register char *p; 353 register char *q; 354 register int c; 355 char **avp; 356 bool bslashmode; 357 int cmntcnt; 358 int anglecnt; 359 char *tok; 360 int state; 361 int newstate; 362 char *saveto = CurEnv->e_to; 363 static char *av[MAXATOM+1]; 364 static char firsttime = TRUE; 365 extern int errno; 366 367 if (firsttime) 368 { 369 /* initialize the token type table */ 370 char obuf[50]; 371 372 firsttime = FALSE; 373 expand("\201o", obuf, &obuf[sizeof obuf - sizeof DELIMCHARS], CurEnv); 374 strcat(obuf, DELIMCHARS); 375 for (p = obuf; *p != '\0'; p++) 376 { 377 if (TokTypeTab[*p & 0xff] == ATM) 378 TokTypeTab[*p & 0xff] = OPR; 379 } 380 } 381 382 /* make sure error messages don't have garbage on them */ 383 errno = 0; 384 385 q = pvpbuf; 386 bslashmode = FALSE; 387 cmntcnt = 0; 388 anglecnt = 0; 389 avp = av; 390 state = ATM; 391 c = NOCHAR; 392 p = addr; 393 CurEnv->e_to = p; 394 if (tTd(22, 11)) 395 { 396 printf("prescan: "); 397 xputs(p); 398 (void) putchar('\n'); 399 } 400 401 do 402 { 403 /* read a token */ 404 tok = q; 405 for (;;) 406 { 407 /* store away any old lookahead character */ 408 if (c != NOCHAR && !bslashmode) 409 { 410 /* see if there is room */ 411 if (q >= &pvpbuf[pvpbsize - 5]) 412 { 413 usrerr("553 Address too long"); 414 returnnull: 415 if (delimptr != NULL) 416 *delimptr = p; 417 CurEnv->e_to = saveto; 418 return (NULL); 419 } 420 421 /* squirrel it away */ 422 *q++ = c; 423 } 424 425 /* read a new input character */ 426 c = *p++; 427 if (c == '\0') 428 { 429 /* diagnose and patch up bad syntax */ 430 if (state == QST) 431 { 432 usrerr("653 Unbalanced '\"'"); 433 c = '"'; 434 } 435 else if (cmntcnt > 0) 436 { 437 usrerr("653 Unbalanced '('"); 438 c = ')'; 439 } 440 else if (anglecnt > 0) 441 { 442 c = '>'; 443 usrerr("653 Unbalanced '<'"); 444 } 445 else 446 break; 447 448 p--; 449 } 450 else if (c == delim && anglecnt <= 0 && 451 cmntcnt <= 0 && state != QST) 452 break; 453 454 if (tTd(22, 101)) 455 printf("c=%c, s=%d; ", c, state); 456 457 /* chew up special characters */ 458 *q = '\0'; 459 if (bslashmode) 460 { 461 bslashmode = FALSE; 462 463 /* kludge \! for naive users */ 464 if (cmntcnt > 0) 465 { 466 c = NOCHAR; 467 continue; 468 } 469 else if (c != '!' || state == QST) 470 { 471 *q++ = '\\'; 472 continue; 473 } 474 } 475 476 if (c == '\\') 477 { 478 bslashmode = TRUE; 479 } 480 else if (state == QST) 481 { 482 /* do nothing, just avoid next clauses */ 483 } 484 else if (c == '(') 485 { 486 cmntcnt++; 487 c = NOCHAR; 488 } 489 else if (c == ')') 490 { 491 if (cmntcnt <= 0) 492 { 493 usrerr("653 Unbalanced ')'"); 494 c = NOCHAR; 495 } 496 else 497 cmntcnt--; 498 } 499 else if (cmntcnt > 0) 500 c = NOCHAR; 501 else if (c == '<') 502 anglecnt++; 503 else if (c == '>') 504 { 505 if (anglecnt <= 0) 506 { 507 usrerr("653 Unbalanced '>'"); 508 c = NOCHAR; 509 } 510 else 511 anglecnt--; 512 } 513 else if (delim == ' ' && isascii(c) && isspace(c)) 514 c = ' '; 515 516 if (c == NOCHAR) 517 continue; 518 519 /* see if this is end of input */ 520 if (c == delim && anglecnt <= 0 && state != QST) 521 break; 522 523 newstate = StateTab[state][toktype(c)]; 524 if (tTd(22, 101)) 525 printf("ns=%02o\n", newstate); 526 state = newstate & TYPE; 527 if (bitset(M, newstate)) 528 c = NOCHAR; 529 if (bitset(B, newstate)) 530 break; 531 } 532 533 /* new token */ 534 if (tok != q) 535 { 536 *q++ = '\0'; 537 if (tTd(22, 36)) 538 { 539 printf("tok="); 540 xputs(tok); 541 (void) putchar('\n'); 542 } 543 if (avp >= &av[MAXATOM]) 544 { 545 syserr("553 prescan: too many tokens"); 546 goto returnnull; 547 } 548 if (q - tok > MAXNAME) 549 { 550 syserr("553 prescan: token too long"); 551 goto returnnull; 552 } 553 *avp++ = tok; 554 } 555 } while (c != '\0' && (c != delim || anglecnt > 0)); 556 *avp = NULL; 557 p--; 558 if (delimptr != NULL) 559 *delimptr = p; 560 if (tTd(22, 12)) 561 { 562 printf("prescan==>"); 563 printav(av); 564 } 565 CurEnv->e_to = saveto; 566 if (av[0] == NULL) 567 { 568 if (tTd(22, 1)) 569 printf("prescan: null leading token\n"); 570 return (NULL); 571 } 572 return (av); 573 } 574 /* 575 ** REWRITE -- apply rewrite rules to token vector. 576 ** 577 ** This routine is an ordered production system. Each rewrite 578 ** rule has a LHS (called the pattern) and a RHS (called the 579 ** rewrite); 'rwr' points the the current rewrite rule. 580 ** 581 ** For each rewrite rule, 'avp' points the address vector we 582 ** are trying to match against, and 'pvp' points to the pattern. 583 ** If pvp points to a special match value (MATCHZANY, MATCHANY, 584 ** MATCHONE, MATCHCLASS, MATCHNCLASS) then the address in avp 585 ** matched is saved away in the match vector (pointed to by 'mvp'). 586 ** 587 ** When a match between avp & pvp does not match, we try to 588 ** back out. If we back up over MATCHONE, MATCHCLASS, or MATCHNCLASS 589 ** we must also back out the match in mvp. If we reach a 590 ** MATCHANY or MATCHZANY we just extend the match and start 591 ** over again. 592 ** 593 ** When we finally match, we rewrite the address vector 594 ** and try over again. 595 ** 596 ** Parameters: 597 ** pvp -- pointer to token vector. 598 ** ruleset -- the ruleset to use for rewriting. 599 ** reclevel -- recursion level (to catch loops). 600 ** e -- the current envelope. 601 ** 602 ** Returns: 603 ** A status code. If EX_TEMPFAIL, higher level code should 604 ** attempt recovery. 605 ** 606 ** Side Effects: 607 ** pvp is modified. 608 */ 609 610 struct match 611 { 612 char **first; /* first token matched */ 613 char **last; /* last token matched */ 614 char **pattern; /* pointer to pattern */ 615 }; 616 617 # define MAXMATCH 9 /* max params per rewrite */ 618 619 620 int 621 rewrite(pvp, ruleset, reclevel, e) 622 char **pvp; 623 int ruleset; 624 int reclevel; 625 register ENVELOPE *e; 626 { 627 register char *ap; /* address pointer */ 628 register char *rp; /* rewrite pointer */ 629 register char **avp; /* address vector pointer */ 630 register char **rvp; /* rewrite vector pointer */ 631 register struct match *mlp; /* cur ptr into mlist */ 632 register struct rewrite *rwr; /* pointer to current rewrite rule */ 633 int ruleno; /* current rule number */ 634 int rstat = EX_OK; /* return status */ 635 int loopcount; 636 struct match mlist[MAXMATCH]; /* stores match on LHS */ 637 char *npvp[MAXATOM+1]; /* temporary space for rebuild */ 638 639 if (OpMode == MD_TEST || tTd(21, 2)) 640 { 641 printf("rewrite: ruleset %2d input:", ruleset); 642 printav(pvp); 643 } 644 if (ruleset < 0 || ruleset >= MAXRWSETS) 645 { 646 syserr("554 rewrite: illegal ruleset number %d", ruleset); 647 return EX_CONFIG; 648 } 649 if (reclevel++ > 50) 650 { 651 syserr("rewrite: infinite recursion, ruleset %d", ruleset); 652 return EX_CONFIG; 653 } 654 if (pvp == NULL) 655 return EX_USAGE; 656 657 /* 658 ** Run through the list of rewrite rules, applying 659 ** any that match. 660 */ 661 662 ruleno = 1; 663 loopcount = 0; 664 for (rwr = RewriteRules[ruleset]; rwr != NULL; ) 665 { 666 if (tTd(21, 12)) 667 { 668 printf("-----trying rule:"); 669 printav(rwr->r_lhs); 670 } 671 672 /* try to match on this rule */ 673 mlp = mlist; 674 rvp = rwr->r_lhs; 675 avp = pvp; 676 if (++loopcount > 100) 677 { 678 syserr("554 Infinite loop in ruleset %d, rule %d", 679 ruleset, ruleno); 680 if (tTd(21, 1)) 681 { 682 printf("workspace: "); 683 printav(pvp); 684 } 685 break; 686 } 687 688 while ((ap = *avp) != NULL || *rvp != NULL) 689 { 690 rp = *rvp; 691 if (tTd(21, 35)) 692 { 693 printf("ADVANCE rp="); 694 xputs(rp); 695 printf(", ap="); 696 xputs(ap); 697 printf("\n"); 698 } 699 if (rp == NULL) 700 { 701 /* end-of-pattern before end-of-address */ 702 goto backup; 703 } 704 if (ap == NULL && (*rp & 0377) != MATCHZANY && 705 (*rp & 0377) != MATCHZERO) 706 { 707 /* end-of-input with patterns left */ 708 goto backup; 709 } 710 711 switch (*rp & 0377) 712 { 713 register STAB *s; 714 char buf[MAXLINE]; 715 716 case MATCHCLASS: 717 /* match any phrase in a class */ 718 mlp->pattern = rvp; 719 mlp->first = avp; 720 extendclass: 721 ap = *avp; 722 if (ap == NULL) 723 goto backup; 724 mlp->last = avp++; 725 cataddr(mlp->first, mlp->last, buf, sizeof buf, '\0'); 726 s = stab(buf, ST_CLASS, ST_FIND); 727 if (s == NULL || !bitnset(rp[1], s->s_class)) 728 { 729 if (tTd(21, 36)) 730 { 731 printf("EXTEND rp="); 732 xputs(rp); 733 printf(", ap="); 734 xputs(ap); 735 printf("\n"); 736 } 737 goto extendclass; 738 } 739 if (tTd(21, 36)) 740 printf("CLMATCH\n"); 741 mlp++; 742 break; 743 744 case MATCHNCLASS: 745 /* match any token not in a class */ 746 s = stab(ap, ST_CLASS, ST_FIND); 747 if (s != NULL && bitnset(rp[1], s->s_class)) 748 goto backup; 749 750 /* fall through */ 751 752 case MATCHONE: 753 case MATCHANY: 754 /* match exactly one token */ 755 mlp->pattern = rvp; 756 mlp->first = avp; 757 mlp->last = avp++; 758 mlp++; 759 break; 760 761 case MATCHZANY: 762 /* match zero or more tokens */ 763 mlp->pattern = rvp; 764 mlp->first = avp; 765 mlp->last = avp - 1; 766 mlp++; 767 break; 768 769 case MATCHZERO: 770 /* match zero tokens */ 771 break; 772 773 case MACRODEXPAND: 774 /* 775 ** Match against run-time macro. 776 ** This algorithm is broken for the 777 ** general case (no recursive macros, 778 ** improper tokenization) but should 779 ** work for the usual cases. 780 */ 781 782 ap = macvalue(rp[1], e); 783 mlp->first = avp; 784 if (tTd(21, 2)) 785 printf("rewrite: LHS $&%c => \"%s\"\n", 786 rp[1], 787 ap == NULL ? "(NULL)" : ap); 788 789 if (ap == NULL) 790 break; 791 while (*ap != '\0') 792 { 793 if (*avp == NULL || 794 strncasecmp(ap, *avp, strlen(*avp)) != 0) 795 { 796 /* no match */ 797 avp = mlp->first; 798 goto backup; 799 } 800 ap += strlen(*avp++); 801 } 802 803 /* match */ 804 break; 805 806 default: 807 /* must have exact match */ 808 if (strcasecmp(rp, ap)) 809 goto backup; 810 avp++; 811 break; 812 } 813 814 /* successful match on this token */ 815 rvp++; 816 continue; 817 818 backup: 819 /* match failed -- back up */ 820 while (--mlp >= mlist) 821 { 822 rvp = mlp->pattern; 823 rp = *rvp; 824 avp = mlp->last + 1; 825 ap = *avp; 826 827 if (tTd(21, 36)) 828 { 829 printf("BACKUP rp="); 830 xputs(rp); 831 printf(", ap="); 832 xputs(ap); 833 printf("\n"); 834 } 835 836 if (ap == NULL) 837 { 838 /* run off the end -- back up again */ 839 continue; 840 } 841 if ((*rp & 0377) == MATCHANY || 842 (*rp & 0377) == MATCHZANY) 843 { 844 /* extend binding and continue */ 845 mlp->last = avp++; 846 rvp++; 847 mlp++; 848 break; 849 } 850 if ((*rp & 0377) == MATCHCLASS) 851 { 852 /* extend binding and try again */ 853 mlp->last = avp; 854 goto extendclass; 855 } 856 } 857 858 if (mlp < mlist) 859 { 860 /* total failure to match */ 861 break; 862 } 863 } 864 865 /* 866 ** See if we successfully matched 867 */ 868 869 if (mlp < mlist || *rvp != NULL) 870 { 871 if (tTd(21, 10)) 872 printf("----- rule fails\n"); 873 rwr = rwr->r_next; 874 ruleno++; 875 loopcount = 0; 876 continue; 877 } 878 879 rvp = rwr->r_rhs; 880 if (tTd(21, 12)) 881 { 882 printf("-----rule matches:"); 883 printav(rvp); 884 } 885 886 rp = *rvp; 887 if ((*rp & 0377) == CANONUSER) 888 { 889 rvp++; 890 rwr = rwr->r_next; 891 ruleno++; 892 loopcount = 0; 893 } 894 else if ((*rp & 0377) == CANONHOST) 895 { 896 rvp++; 897 rwr = NULL; 898 } 899 else if ((*rp & 0377) == CANONNET) 900 rwr = NULL; 901 902 /* substitute */ 903 for (avp = npvp; *rvp != NULL; rvp++) 904 { 905 register struct match *m; 906 register char **pp; 907 908 rp = *rvp; 909 if ((*rp & 0377) == MATCHREPL) 910 { 911 /* substitute from LHS */ 912 m = &mlist[rp[1] - '1']; 913 if (m < mlist || m >= mlp) 914 { 915 syserr("554 rewrite: ruleset %d: replacement $%c out of bounds", 916 ruleset, rp[1]); 917 return EX_CONFIG; 918 } 919 if (tTd(21, 15)) 920 { 921 printf("$%c:", rp[1]); 922 pp = m->first; 923 while (pp <= m->last) 924 { 925 printf(" %x=\"", *pp); 926 (void) fflush(stdout); 927 printf("%s\"", *pp++); 928 } 929 printf("\n"); 930 } 931 pp = m->first; 932 while (pp <= m->last) 933 { 934 if (avp >= &npvp[MAXATOM]) 935 { 936 syserr("554 rewrite: expansion too long"); 937 return EX_DATAERR; 938 } 939 *avp++ = *pp++; 940 } 941 } 942 else 943 { 944 /* vanilla replacement */ 945 if (avp >= &npvp[MAXATOM]) 946 { 947 toolong: 948 syserr("554 rewrite: expansion too long"); 949 return EX_DATAERR; 950 } 951 if ((*rp & 0377) != MACRODEXPAND) 952 *avp++ = rp; 953 else 954 { 955 *avp = macvalue(rp[1], e); 956 if (tTd(21, 2)) 957 printf("rewrite: RHS $&%c => \"%s\"\n", 958 rp[1], 959 *avp == NULL ? "(NULL)" : *avp); 960 if (*avp != NULL) 961 avp++; 962 } 963 } 964 } 965 *avp++ = NULL; 966 967 /* 968 ** Check for any hostname/keyword lookups. 969 */ 970 971 for (rvp = npvp; *rvp != NULL; rvp++) 972 { 973 char **hbrvp; 974 char **xpvp; 975 int trsize; 976 char *replac; 977 int endtoken; 978 STAB *map; 979 char *mapname; 980 char **key_rvp; 981 char **arg_rvp; 982 char **default_rvp; 983 char buf[MAXNAME + 1]; 984 char *pvpb1[MAXATOM + 1]; 985 char *argvect[10]; 986 char pvpbuf[PSBUFSIZE]; 987 char *nullpvp[1]; 988 989 if ((**rvp & 0377) != HOSTBEGIN && 990 (**rvp & 0377) != LOOKUPBEGIN) 991 continue; 992 993 /* 994 ** Got a hostname/keyword lookup. 995 ** 996 ** This could be optimized fairly easily. 997 */ 998 999 hbrvp = rvp; 1000 if ((**rvp & 0377) == HOSTBEGIN) 1001 { 1002 endtoken = HOSTEND; 1003 mapname = "host"; 1004 } 1005 else 1006 { 1007 endtoken = LOOKUPEND; 1008 mapname = *++rvp; 1009 } 1010 map = stab(mapname, ST_MAP, ST_FIND); 1011 if (map == NULL) 1012 syserr("554 rewrite: map %s not found", mapname); 1013 1014 /* extract the match part */ 1015 key_rvp = ++rvp; 1016 default_rvp = NULL; 1017 arg_rvp = argvect; 1018 xpvp = NULL; 1019 replac = pvpbuf; 1020 while (*rvp != NULL && (**rvp & 0377) != endtoken) 1021 { 1022 int nodetype = **rvp & 0377; 1023 1024 if (nodetype != CANONHOST && nodetype != CANONUSER) 1025 { 1026 rvp++; 1027 continue; 1028 } 1029 1030 *rvp++ = NULL; 1031 1032 if (xpvp != NULL) 1033 { 1034 cataddr(xpvp, NULL, replac, 1035 &pvpbuf[sizeof pvpbuf] - replac, 1036 '\0'); 1037 *++arg_rvp = replac; 1038 replac += strlen(replac) + 1; 1039 xpvp = NULL; 1040 } 1041 switch (nodetype) 1042 { 1043 case CANONHOST: 1044 xpvp = rvp; 1045 break; 1046 1047 case CANONUSER: 1048 default_rvp = rvp; 1049 break; 1050 } 1051 } 1052 if (*rvp != NULL) 1053 *rvp++ = NULL; 1054 if (xpvp != NULL) 1055 { 1056 cataddr(xpvp, NULL, replac, 1057 &pvpbuf[sizeof pvpbuf] - replac, 1058 '\0'); 1059 *++arg_rvp = replac; 1060 } 1061 *++arg_rvp = NULL; 1062 1063 /* save the remainder of the input string */ 1064 trsize = (int) (avp - rvp + 1) * sizeof *rvp; 1065 bcopy((char *) rvp, (char *) pvpb1, trsize); 1066 1067 /* look it up */ 1068 cataddr(key_rvp, NULL, buf, sizeof buf, '\0'); 1069 argvect[0] = buf; 1070 if (map != NULL && bitset(MF_OPEN, map->s_map.map_mflags)) 1071 { 1072 auto int stat = EX_OK; 1073 1074 /* XXX should try to auto-open the map here */ 1075 1076 if (tTd(60, 1)) 1077 printf("map_lookup(%s, %s) => ", 1078 mapname, buf); 1079 replac = (*map->s_map.map_class->map_lookup)(&map->s_map, 1080 buf, argvect, &stat); 1081 if (tTd(60, 1)) 1082 printf("%s (%d)\n", 1083 replac ? replac : "NOT FOUND", 1084 stat); 1085 1086 /* should recover if stat == EX_TEMPFAIL */ 1087 if (stat == EX_TEMPFAIL) 1088 rstat = stat; 1089 } 1090 else 1091 replac = NULL; 1092 1093 /* if no replacement, use default */ 1094 if (replac == NULL && default_rvp != NULL) 1095 { 1096 /* create the default */ 1097 cataddr(default_rvp, NULL, buf, sizeof buf, '\0'); 1098 replac = buf; 1099 } 1100 1101 if (replac == NULL) 1102 { 1103 xpvp = key_rvp; 1104 } 1105 else if (*replac == '\0') 1106 { 1107 /* null replacement */ 1108 nullpvp[0] = NULL; 1109 xpvp = nullpvp; 1110 } 1111 else 1112 { 1113 /* scan the new replacement */ 1114 xpvp = prescan(replac, '\0', pvpbuf, 1115 sizeof pvpbuf, NULL); 1116 if (xpvp == NULL) 1117 { 1118 /* prescan already printed error */ 1119 return EX_DATAERR; 1120 } 1121 } 1122 1123 /* append it to the token list */ 1124 for (avp = hbrvp; *xpvp != NULL; xpvp++) 1125 { 1126 *avp++ = newstr(*xpvp); 1127 if (avp >= &npvp[MAXATOM]) 1128 goto toolong; 1129 } 1130 1131 /* restore the old trailing information */ 1132 for (xpvp = pvpb1; (*avp++ = *xpvp++) != NULL; ) 1133 if (avp >= &npvp[MAXATOM]) 1134 goto toolong; 1135 1136 break; 1137 } 1138 1139 /* 1140 ** Check for subroutine calls. 1141 */ 1142 1143 if (*npvp != NULL && (**npvp & 0377) == CALLSUBR) 1144 { 1145 int stat; 1146 1147 bcopy((char *) &npvp[2], (char *) pvp, 1148 (int) (avp - npvp - 2) * sizeof *avp); 1149 if (tTd(21, 3)) 1150 printf("-----callsubr %s\n", npvp[1]); 1151 stat = rewrite(pvp, atoi(npvp[1]), reclevel, e); 1152 if (rstat == EX_OK || stat == EX_TEMPFAIL) 1153 rstat = stat; 1154 if (*pvp != NULL && (**pvp & 0377) == CANONNET) 1155 rwr = NULL; 1156 } 1157 else 1158 { 1159 bcopy((char *) npvp, (char *) pvp, 1160 (int) (avp - npvp) * sizeof *avp); 1161 } 1162 if (tTd(21, 4)) 1163 { 1164 printf("rewritten as:"); 1165 printav(pvp); 1166 } 1167 } 1168 1169 if (OpMode == MD_TEST || tTd(21, 2)) 1170 { 1171 printf("rewrite: ruleset %2d returns:", ruleset); 1172 printav(pvp); 1173 } 1174 1175 return rstat; 1176 } 1177 /* 1178 ** BUILDADDR -- build address from token vector. 1179 ** 1180 ** Parameters: 1181 ** tv -- token vector. 1182 ** a -- pointer to address descriptor to fill. 1183 ** If NULL, one will be allocated. 1184 ** flags -- info regarding whether this is a sender or 1185 ** a recipient. 1186 ** e -- the current envelope. 1187 ** 1188 ** Returns: 1189 ** NULL if there was an error. 1190 ** 'a' otherwise. 1191 ** 1192 ** Side Effects: 1193 ** fills in 'a' 1194 */ 1195 1196 struct errcodes 1197 { 1198 char *ec_name; /* name of error code */ 1199 int ec_code; /* numeric code */ 1200 } ErrorCodes[] = 1201 { 1202 "usage", EX_USAGE, 1203 "nouser", EX_NOUSER, 1204 "nohost", EX_NOHOST, 1205 "unavailable", EX_UNAVAILABLE, 1206 "software", EX_SOFTWARE, 1207 "tempfail", EX_TEMPFAIL, 1208 "protocol", EX_PROTOCOL, 1209 #ifdef EX_CONFIG 1210 "config", EX_CONFIG, 1211 #endif 1212 NULL, EX_UNAVAILABLE, 1213 }; 1214 1215 ADDRESS * 1216 buildaddr(tv, a, flags, e) 1217 register char **tv; 1218 register ADDRESS *a; 1219 int flags; 1220 register ENVELOPE *e; 1221 { 1222 struct mailer **mp; 1223 register struct mailer *m; 1224 char *bp; 1225 int spaceleft; 1226 static MAILER errormailer; 1227 static char *errorargv[] = { "ERROR", NULL }; 1228 static char buf[MAXNAME]; 1229 1230 if (tTd(24, 5)) 1231 { 1232 printf("buildaddr, flags=%o, tv=", flags); 1233 printav(tv); 1234 } 1235 1236 if (a == NULL) 1237 a = (ADDRESS *) xalloc(sizeof *a); 1238 bzero((char *) a, sizeof *a); 1239 1240 /* figure out what net/mailer to use */ 1241 if (*tv == NULL || (**tv & 0377) != CANONNET) 1242 { 1243 syserr("554 buildaddr: no net"); 1244 badaddr: 1245 a->q_flags |= QBADADDR; 1246 a->q_mailer = &errormailer; 1247 if (errormailer.m_name == NULL) 1248 { 1249 /* initialize the bogus mailer */ 1250 errormailer.m_name = "*error*"; 1251 errormailer.m_mailer = "ERROR"; 1252 errormailer.m_argv = errorargv; 1253 } 1254 return a; 1255 } 1256 tv++; 1257 if (strcasecmp(*tv, "error") == 0) 1258 { 1259 if ((**++tv & 0377) == CANONHOST) 1260 { 1261 register struct errcodes *ep; 1262 1263 if (isascii(**++tv) && isdigit(**tv)) 1264 { 1265 setstat(atoi(*tv)); 1266 } 1267 else 1268 { 1269 for (ep = ErrorCodes; ep->ec_name != NULL; ep++) 1270 if (strcasecmp(ep->ec_name, *tv) == 0) 1271 break; 1272 setstat(ep->ec_code); 1273 } 1274 tv++; 1275 } 1276 else 1277 setstat(EX_UNAVAILABLE); 1278 if ((**tv & 0377) != CANONUSER) 1279 syserr("554 buildaddr: error: no user"); 1280 cataddr(++tv, NULL, buf, sizeof buf, ' '); 1281 stripquotes(buf); 1282 if (isascii(buf[0]) && isdigit(buf[0]) && 1283 isascii(buf[1]) && isdigit(buf[1]) && 1284 isascii(buf[2]) && isdigit(buf[2]) && 1285 buf[3] == ' ') 1286 { 1287 char fmt[10]; 1288 1289 strncpy(fmt, buf, 3); 1290 strcpy(&fmt[3], " %s"); 1291 usrerr(fmt, buf + 4); 1292 } 1293 else 1294 { 1295 usrerr("%s", buf); 1296 } 1297 goto badaddr; 1298 } 1299 1300 for (mp = Mailer; (m = *mp++) != NULL; ) 1301 { 1302 if (strcasecmp(m->m_name, *tv) == 0) 1303 break; 1304 } 1305 if (m == NULL) 1306 { 1307 syserr("554 buildaddr: unknown mailer %s", *tv); 1308 goto badaddr; 1309 } 1310 a->q_mailer = m; 1311 1312 /* figure out what host (if any) */ 1313 tv++; 1314 if ((**tv & 0377) == CANONHOST) 1315 { 1316 bp = buf; 1317 spaceleft = sizeof buf - 1; 1318 while (*++tv != NULL && (**tv & 0377) != CANONUSER) 1319 { 1320 int i = strlen(*tv); 1321 1322 if (i > spaceleft) 1323 { 1324 /* out of space for this address */ 1325 if (spaceleft >= 0) 1326 syserr("554 buildaddr: host too long (%.40s...)", 1327 buf); 1328 i = spaceleft; 1329 spaceleft = 0; 1330 } 1331 if (i <= 0) 1332 continue; 1333 bcopy(*tv, bp, i); 1334 bp += i; 1335 spaceleft -= i; 1336 } 1337 *bp = '\0'; 1338 a->q_host = newstr(buf); 1339 } 1340 else 1341 { 1342 if (!bitnset(M_LOCALMAILER, m->m_flags)) 1343 { 1344 syserr("554 buildaddr: no host"); 1345 goto badaddr; 1346 } 1347 a->q_host = NULL; 1348 } 1349 1350 /* figure out the user */ 1351 if (*tv == NULL || (**tv & 0377) != CANONUSER) 1352 { 1353 syserr("554 buildaddr: no user"); 1354 goto badaddr; 1355 } 1356 tv++; 1357 1358 /* do special mapping for local mailer */ 1359 if (m == LocalMailer && *tv != NULL) 1360 { 1361 register char *p = *tv; 1362 1363 if (*p == '"') 1364 p++; 1365 if (*p == '|') 1366 a->q_mailer = m = ProgMailer; 1367 else if (*p == '/') 1368 a->q_mailer = m = FileMailer; 1369 else if (*p == ':') 1370 { 1371 /* may be :include: */ 1372 cataddr(tv, NULL, buf, sizeof buf, '\0'); 1373 stripquotes(buf); 1374 if (strncasecmp(buf, ":include:", 9) == 0) 1375 { 1376 /* if :include:, don't need further rewriting */ 1377 a->q_mailer = m = InclMailer; 1378 a->q_user = &buf[9]; 1379 return (a); 1380 } 1381 } 1382 } 1383 1384 if (m == LocalMailer && *tv != NULL && strcmp(*tv, "@") == 0) 1385 { 1386 tv++; 1387 a->q_flags |= QNOTREMOTE; 1388 } 1389 1390 /* rewrite according recipient mailer rewriting rules */ 1391 define('h', a->q_host, e); 1392 if (!bitset(RF_SENDERADDR|RF_HEADERADDR, flags)) 1393 { 1394 /* sender addresses done later */ 1395 (void) rewrite(tv, 2, 0, e); 1396 if (m->m_re_rwset > 0) 1397 (void) rewrite(tv, m->m_re_rwset, 0, e); 1398 } 1399 (void) rewrite(tv, 4, 0, e); 1400 1401 /* save the result for the command line/RCPT argument */ 1402 cataddr(tv, NULL, buf, sizeof buf, '\0'); 1403 a->q_user = buf; 1404 1405 /* 1406 ** Do mapping to lower case as requested by mailer 1407 */ 1408 1409 if (a->q_host != NULL && !bitnset(M_HST_UPPER, m->m_flags)) 1410 makelower(a->q_host); 1411 if (!bitnset(M_USR_UPPER, m->m_flags)) 1412 makelower(a->q_user); 1413 1414 return (a); 1415 } 1416 /* 1417 ** CATADDR -- concatenate pieces of addresses (putting in <LWSP> subs) 1418 ** 1419 ** Parameters: 1420 ** pvp -- parameter vector to rebuild. 1421 ** evp -- last parameter to include. Can be NULL to 1422 ** use entire pvp. 1423 ** buf -- buffer to build the string into. 1424 ** sz -- size of buf. 1425 ** spacesub -- the space separator character; if null, 1426 ** use SpaceSub. 1427 ** 1428 ** Returns: 1429 ** none. 1430 ** 1431 ** Side Effects: 1432 ** Destroys buf. 1433 */ 1434 1435 cataddr(pvp, evp, buf, sz, spacesub) 1436 char **pvp; 1437 char **evp; 1438 char *buf; 1439 register int sz; 1440 char spacesub; 1441 { 1442 bool oatomtok = FALSE; 1443 bool natomtok = FALSE; 1444 register int i; 1445 register char *p; 1446 1447 if (spacesub == '\0') 1448 spacesub = SpaceSub; 1449 1450 if (pvp == NULL) 1451 { 1452 (void) strcpy(buf, ""); 1453 return; 1454 } 1455 p = buf; 1456 sz -= 2; 1457 while (*pvp != NULL && (i = strlen(*pvp)) < sz) 1458 { 1459 natomtok = (toktype(**pvp) == ATM); 1460 if (oatomtok && natomtok) 1461 *p++ = spacesub; 1462 (void) strcpy(p, *pvp); 1463 oatomtok = natomtok; 1464 p += i; 1465 sz -= i + 1; 1466 if (pvp++ == evp) 1467 break; 1468 } 1469 *p = '\0'; 1470 } 1471 /* 1472 ** SAMEADDR -- Determine if two addresses are the same 1473 ** 1474 ** This is not just a straight comparison -- if the mailer doesn't 1475 ** care about the host we just ignore it, etc. 1476 ** 1477 ** Parameters: 1478 ** a, b -- pointers to the internal forms to compare. 1479 ** 1480 ** Returns: 1481 ** TRUE -- they represent the same mailbox. 1482 ** FALSE -- they don't. 1483 ** 1484 ** Side Effects: 1485 ** none. 1486 */ 1487 1488 bool 1489 sameaddr(a, b) 1490 register ADDRESS *a; 1491 register ADDRESS *b; 1492 { 1493 /* if they don't have the same mailer, forget it */ 1494 if (a->q_mailer != b->q_mailer) 1495 return (FALSE); 1496 1497 /* if the user isn't the same, we can drop out */ 1498 if (strcmp(a->q_user, b->q_user) != 0) 1499 return (FALSE); 1500 1501 /* if we have good uids for both but the differ, these are different */ 1502 if (bitset(QGOODUID, a->q_flags & b->q_flags) && a->q_uid != b->q_uid) 1503 return (FALSE); 1504 1505 /* otherwise compare hosts (but be careful for NULL ptrs) */ 1506 if (a->q_host == b->q_host) 1507 { 1508 /* probably both null pointers */ 1509 return (TRUE); 1510 } 1511 if (a->q_host == NULL || b->q_host == NULL) 1512 { 1513 /* only one is a null pointer */ 1514 return (FALSE); 1515 } 1516 if (strcmp(a->q_host, b->q_host) != 0) 1517 return (FALSE); 1518 1519 return (TRUE); 1520 } 1521 /* 1522 ** PRINTADDR -- print address (for debugging) 1523 ** 1524 ** Parameters: 1525 ** a -- the address to print 1526 ** follow -- follow the q_next chain. 1527 ** 1528 ** Returns: 1529 ** none. 1530 ** 1531 ** Side Effects: 1532 ** none. 1533 */ 1534 1535 printaddr(a, follow) 1536 register ADDRESS *a; 1537 bool follow; 1538 { 1539 bool first = TRUE; 1540 register MAILER *m; 1541 MAILER pseudomailer; 1542 1543 while (a != NULL) 1544 { 1545 first = FALSE; 1546 printf("%x=", a); 1547 (void) fflush(stdout); 1548 1549 /* find the mailer -- carefully */ 1550 m = a->q_mailer; 1551 if (m == NULL) 1552 { 1553 m = &pseudomailer; 1554 m->m_mno = -1; 1555 m->m_name = "NULL"; 1556 } 1557 1558 printf("%s:\n\tmailer %d (%s), host `%s', user `%s', ruser `%s'\n", 1559 a->q_paddr, m->m_mno, m->m_name, 1560 a->q_host, a->q_user, 1561 a->q_ruser ? a->q_ruser : "<null>"); 1562 printf("\tnext=%x, flags=%o, alias %x, uid %d, gid %d\n", 1563 a->q_next, a->q_flags, a->q_alias, a->q_uid, a->q_gid); 1564 printf("\towner=%s, home=\"%s\", fullname=\"%s\"\n", 1565 a->q_owner == NULL ? "(none)" : a->q_owner, 1566 a->q_home == NULL ? "(none)" : a->q_home, 1567 a->q_fullname == NULL ? "(none)" : a->q_fullname); 1568 1569 if (!follow) 1570 return; 1571 a = a->q_next; 1572 } 1573 if (first) 1574 printf("[NULL]\n"); 1575 } 1576 1577 /* 1578 ** REMOTENAME -- return the name relative to the current mailer 1579 ** 1580 ** Parameters: 1581 ** name -- the name to translate. 1582 ** m -- the mailer that we want to do rewriting relative 1583 ** to. 1584 ** flags -- fine tune operations. 1585 ** pstat -- pointer to status word. 1586 ** e -- the current envelope. 1587 ** 1588 ** Returns: 1589 ** the text string representing this address relative to 1590 ** the receiving mailer. 1591 ** 1592 ** Side Effects: 1593 ** none. 1594 ** 1595 ** Warnings: 1596 ** The text string returned is tucked away locally; 1597 ** copy it if you intend to save it. 1598 */ 1599 1600 char * 1601 remotename(name, m, flags, pstat, e) 1602 char *name; 1603 struct mailer *m; 1604 int flags; 1605 int *pstat; 1606 register ENVELOPE *e; 1607 { 1608 register char **pvp; 1609 char *fancy; 1610 char *oldg = macvalue('g', e); 1611 int rwset; 1612 static char buf[MAXNAME]; 1613 char lbuf[MAXNAME]; 1614 char pvpbuf[PSBUFSIZE]; 1615 extern char *crackaddr(); 1616 1617 if (tTd(12, 1)) 1618 printf("remotename(%s)\n", name); 1619 1620 /* don't do anything if we are tagging it as special */ 1621 if (bitset(RF_SENDERADDR, flags)) 1622 rwset = bitset(RF_HEADERADDR, flags) ? m->m_sh_rwset 1623 : m->m_se_rwset; 1624 else 1625 rwset = bitset(RF_HEADERADDR, flags) ? m->m_rh_rwset 1626 : m->m_re_rwset; 1627 if (rwset < 0) 1628 return (name); 1629 1630 /* 1631 ** Do a heuristic crack of this name to extract any comment info. 1632 ** This will leave the name as a comment and a $g macro. 1633 */ 1634 1635 if (bitset(RF_CANONICAL, flags) || bitnset(M_NOCOMMENT, m->m_flags)) 1636 fancy = "\201g"; 1637 else 1638 fancy = crackaddr(name); 1639 1640 /* 1641 ** Turn the name into canonical form. 1642 ** Normally this will be RFC 822 style, i.e., "user@domain". 1643 ** If this only resolves to "user", and the "C" flag is 1644 ** specified in the sending mailer, then the sender's 1645 ** domain will be appended. 1646 */ 1647 1648 pvp = prescan(name, '\0', pvpbuf, sizeof pvpbuf, NULL); 1649 if (pvp == NULL) 1650 return (name); 1651 if (rewrite(pvp, 3, 0, e) == EX_TEMPFAIL) 1652 *pstat = EX_TEMPFAIL; 1653 if (bitset(RF_ADDDOMAIN, flags) && e->e_fromdomain != NULL) 1654 { 1655 /* append from domain to this address */ 1656 register char **pxp = pvp; 1657 1658 /* see if there is an "@domain" in the current name */ 1659 while (*pxp != NULL && strcmp(*pxp, "@") != 0) 1660 pxp++; 1661 if (*pxp == NULL) 1662 { 1663 /* no.... append the "@domain" from the sender */ 1664 register char **qxq = e->e_fromdomain; 1665 1666 while ((*pxp++ = *qxq++) != NULL) 1667 continue; 1668 if (rewrite(pvp, 3, 0, e) == EX_TEMPFAIL) 1669 *pstat = EX_TEMPFAIL; 1670 } 1671 } 1672 1673 /* 1674 ** Do more specific rewriting. 1675 ** Rewrite using ruleset 1 or 2 depending on whether this is 1676 ** a sender address or not. 1677 ** Then run it through any receiving-mailer-specific rulesets. 1678 */ 1679 1680 if (bitset(RF_SENDERADDR, flags)) 1681 { 1682 if (rewrite(pvp, 1, 0, e) == EX_TEMPFAIL) 1683 *pstat = EX_TEMPFAIL; 1684 } 1685 else 1686 { 1687 if (rewrite(pvp, 2, 0, e) == EX_TEMPFAIL) 1688 *pstat = EX_TEMPFAIL; 1689 } 1690 if (rwset > 0) 1691 { 1692 if (rewrite(pvp, rwset, 0, e) == EX_TEMPFAIL) 1693 *pstat = EX_TEMPFAIL; 1694 } 1695 1696 /* 1697 ** Do any final sanitation the address may require. 1698 ** This will normally be used to turn internal forms 1699 ** (e.g., user@host.LOCAL) into external form. This 1700 ** may be used as a default to the above rules. 1701 */ 1702 1703 if (rewrite(pvp, 4, 0, e) == EX_TEMPFAIL) 1704 *pstat = EX_TEMPFAIL; 1705 1706 /* 1707 ** Now restore the comment information we had at the beginning. 1708 */ 1709 1710 cataddr(pvp, NULL, lbuf, sizeof lbuf, '\0'); 1711 define('g', lbuf, e); 1712 expand(fancy, buf, &buf[sizeof buf - 1], e); 1713 define('g', oldg, e); 1714 1715 if (tTd(12, 1)) 1716 printf("remotename => `%s'\n", buf); 1717 return (buf); 1718 } 1719 /* 1720 ** MAPLOCALUSER -- run local username through ruleset 5 for final redirection 1721 ** 1722 ** Parameters: 1723 ** a -- the address to map (but just the user name part). 1724 ** sendq -- the sendq in which to install any replacement 1725 ** addresses. 1726 ** 1727 ** Returns: 1728 ** none. 1729 */ 1730 1731 maplocaluser(a, sendq, e) 1732 register ADDRESS *a; 1733 ADDRESS **sendq; 1734 ENVELOPE *e; 1735 { 1736 register char **pvp; 1737 register ADDRESS *a1 = NULL; 1738 auto char *delimptr; 1739 char pvpbuf[PSBUFSIZE]; 1740 1741 if (tTd(29, 1)) 1742 { 1743 printf("maplocaluser: "); 1744 printaddr(a, FALSE); 1745 } 1746 pvp = prescan(a->q_user, '\0', pvpbuf, sizeof pvpbuf, &delimptr); 1747 if (pvp == NULL) 1748 return; 1749 1750 (void) rewrite(pvp, 5, 0, e); 1751 if (pvp[0] == NULL || (pvp[0][0] & 0377) != CANONNET) 1752 return; 1753 1754 /* if non-null, mailer destination specified -- has it changed? */ 1755 a1 = buildaddr(pvp, NULL, 0, e); 1756 if (a1 == NULL || sameaddr(a, a1)) 1757 return; 1758 1759 /* mark old address as dead; insert new address */ 1760 a->q_flags |= QDONTSEND; 1761 if (tTd(29, 5)) 1762 { 1763 printf("maplocaluser: QDONTSEND "); 1764 printaddr(a, FALSE); 1765 } 1766 a1->q_alias = a; 1767 allocaddr(a1, RF_COPYALL, NULL); 1768 (void) recipient(a1, sendq, e); 1769 } 1770 /* 1771 ** DEQUOTE_INIT -- initialize dequote map 1772 ** 1773 ** This is a no-op. 1774 ** 1775 ** Parameters: 1776 ** map -- the internal map structure. 1777 ** args -- arguments. 1778 ** 1779 ** Returns: 1780 ** TRUE. 1781 */ 1782 1783 bool 1784 dequote_init(map, args) 1785 MAP *map; 1786 char *args; 1787 { 1788 register char *p = args; 1789 1790 for (;;) 1791 { 1792 while (isascii(*p) && isspace(*p)) 1793 p++; 1794 if (*p != '-') 1795 break; 1796 switch (*++p) 1797 { 1798 case 'a': 1799 map->map_app = ++p; 1800 break; 1801 } 1802 while (*p != '\0' && !(isascii(*p) && isspace(*p))) 1803 p++; 1804 if (*p != '\0') 1805 *p = '\0'; 1806 } 1807 if (map->map_app != NULL) 1808 map->map_app = newstr(map->map_app); 1809 1810 return TRUE; 1811 } 1812 /* 1813 ** DEQUOTE_MAP -- unquote an address 1814 ** 1815 ** Parameters: 1816 ** map -- the internal map structure (ignored). 1817 ** name -- the name to dequote. 1818 ** av -- arguments (ignored). 1819 ** statp -- pointer to status out-parameter. 1820 ** 1821 ** Returns: 1822 ** NULL -- if there were no quotes, or if the resulting 1823 ** unquoted buffer would not be acceptable to prescan. 1824 ** else -- The dequoted buffer. 1825 */ 1826 1827 char * 1828 dequote_map(map, name, av, statp) 1829 MAP *map; 1830 char *name; 1831 char **av; 1832 int *statp; 1833 { 1834 register char *p; 1835 register char *q; 1836 register char c; 1837 int anglecnt; 1838 int cmntcnt; 1839 int quotecnt; 1840 int spacecnt; 1841 bool quotemode; 1842 bool bslashmode; 1843 1844 anglecnt = 0; 1845 cmntcnt = 0; 1846 quotecnt = 0; 1847 spacecnt = 0; 1848 quotemode = FALSE; 1849 bslashmode = FALSE; 1850 1851 for (p = q = name; (c = *p++) != '\0'; ) 1852 { 1853 if (bslashmode) 1854 { 1855 bslashmode = FALSE; 1856 *q++ = c; 1857 continue; 1858 } 1859 1860 switch (c) 1861 { 1862 case '\\': 1863 bslashmode = TRUE; 1864 break; 1865 1866 case '(': 1867 cmntcnt++; 1868 break; 1869 1870 case ')': 1871 if (cmntcnt-- <= 0) 1872 return NULL; 1873 break; 1874 1875 case ' ': 1876 spacecnt++; 1877 break; 1878 } 1879 1880 if (cmntcnt > 0) 1881 { 1882 *q++ = c; 1883 continue; 1884 } 1885 1886 switch (c) 1887 { 1888 case '"': 1889 quotemode = !quotemode; 1890 quotecnt++; 1891 continue; 1892 1893 case '<': 1894 anglecnt++; 1895 break; 1896 1897 case '>': 1898 if (anglecnt-- <= 0) 1899 return NULL; 1900 break; 1901 } 1902 *q++ = c; 1903 } 1904 1905 if (anglecnt != 0 || cmntcnt != 0 || bslashmode || 1906 quotemode || quotecnt <= 0 || spacecnt != 0) 1907 return NULL; 1908 *q++ = '\0'; 1909 return name; 1910 } 1911