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 9 #ifndef lint 10 static char sccsid[] = "@(#)parseaddr.c 6.29 (Berkeley) 03/23/93"; 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 ** copyf -- determines what shall be copied: 34 ** -1 -- don't copy anything. The printname 35 ** (q_paddr) is just addr, and the 36 ** user & host are allocated internally 37 ** to parse. 38 ** 0 -- copy out the parsed user & host, but 39 ** don't copy the printname. 40 ** +1 -- copy everything. 41 ** delim -- the character to terminate the address, passed 42 ** to prescan. 43 ** delimptr -- if non-NULL, set to the location of the 44 ** delim character that was found. 45 ** e -- the envelope that will contain this address. 46 ** 47 ** Returns: 48 ** A pointer to the address descriptor header (`a' if 49 ** `a' is non-NULL). 50 ** NULL on error. 51 ** 52 ** Side Effects: 53 ** none 54 */ 55 56 /* following delimiters are inherent to the internal algorithms */ 57 # define DELIMCHARS "\201()<>,;\\\"\r\n" /* word delimiters */ 58 59 ADDRESS * 60 parseaddr(addr, a, copyf, delim, delimptr, e) 61 char *addr; 62 register ADDRESS *a; 63 int copyf; 64 char delim; 65 char **delimptr; 66 register ENVELOPE *e; 67 { 68 register char **pvp; 69 auto char *delimptrbuf; 70 char pvpbuf[PSBUFSIZE]; 71 extern char **prescan(); 72 extern ADDRESS *buildaddr(); 73 extern bool invalidaddr(); 74 75 /* 76 ** Initialize and prescan address. 77 */ 78 79 e->e_to = addr; 80 if (tTd(20, 1)) 81 printf("\n--parseaddr(%s)\n", addr); 82 83 if (invalidaddr(addr)) 84 { 85 if (tTd(20, 1)) 86 printf("parseaddr-->bad address\n"); 87 return NULL; 88 } 89 90 if (delimptr == NULL) 91 delimptr = &delimptrbuf; 92 93 pvp = prescan(addr, delim, pvpbuf, delimptr); 94 if (pvp == NULL) 95 { 96 if (tTd(20, 1)) 97 printf("parseaddr-->NULL\n"); 98 return (NULL); 99 } 100 101 /* 102 ** Apply rewriting rules. 103 ** Ruleset 0 does basic parsing. It must resolve. 104 */ 105 106 rewrite(pvp, 3); 107 rewrite(pvp, 0); 108 109 /* 110 ** See if we resolved to a real mailer. 111 */ 112 113 if ((pvp[0][0] & 0377) != CANONNET) 114 { 115 setstat(EX_USAGE); 116 syserr("554 cannot resolve name"); 117 return (NULL); 118 } 119 120 /* 121 ** Build canonical address from pvp. 122 */ 123 124 a = buildaddr(pvp, a); 125 if (a == NULL) 126 return (NULL); 127 128 /* 129 ** Make local copies of the host & user and then 130 ** transport them out. 131 */ 132 133 allocaddr(a, copyf, addr, *delimptr); 134 135 /* 136 ** Compute return value. 137 */ 138 139 if (tTd(20, 1)) 140 { 141 printf("parseaddr-->"); 142 printaddr(a, FALSE); 143 } 144 145 return (a); 146 } 147 /* 148 ** INVALIDADDR -- check for address containing meta-characters 149 ** 150 ** Parameters: 151 ** addr -- the address to check. 152 ** 153 ** Returns: 154 ** TRUE -- if the address has any "wierd" characters 155 ** FALSE -- otherwise. 156 */ 157 158 bool 159 invalidaddr(addr) 160 register char *addr; 161 { 162 for (; *addr != '\0'; addr++) 163 { 164 if ((*addr & 0340) != 0200) 165 continue; 166 setstat(EX_USAGE); 167 usrerr("553 Address contained invalid control characters"); 168 return TRUE; 169 } 170 return FALSE; 171 } 172 /* 173 ** ALLOCADDR -- do local allocations of address on demand. 174 ** 175 ** Also lowercases the host name if requested. 176 ** 177 ** Parameters: 178 ** a -- the address to reallocate. 179 ** copyf -- the copy flag (see parseaddr for description). 180 ** paddr -- the printname of the address. 181 ** delimptr -- a pointer to the address delimiter. Must be set. 182 ** 183 ** Returns: 184 ** none. 185 ** 186 ** Side Effects: 187 ** Copies portions of a into local buffers as requested. 188 */ 189 190 allocaddr(a, copyf, paddr, delimptr) 191 register ADDRESS *a; 192 int copyf; 193 char *paddr; 194 char *delimptr; 195 { 196 register MAILER *m = a->q_mailer; 197 198 if (tTd(24, 4)) 199 printf("allocaddr(copyf=%d, paddr=%s)\n", copyf, paddr); 200 201 if (copyf > 0 && paddr != NULL) 202 { 203 char savec = *delimptr; 204 205 *delimptr = '\0'; 206 a->q_paddr = newstr(paddr); 207 *delimptr = savec; 208 } 209 else 210 a->q_paddr = paddr; 211 212 if (a->q_user == NULL) 213 a->q_user = ""; 214 if (a->q_host == NULL) 215 a->q_host = ""; 216 217 if (copyf >= 0) 218 { 219 a->q_host = newstr(a->q_host); 220 if (a->q_user != a->q_paddr) 221 a->q_user = newstr(a->q_user); 222 } 223 224 if (a->q_paddr == NULL) 225 a->q_paddr = a->q_user; 226 } 227 /* 228 ** PRESCAN -- Prescan name and make it canonical 229 ** 230 ** Scans a name and turns it into a set of tokens. This process 231 ** deletes blanks and comments (in parentheses). 232 ** 233 ** This routine knows about quoted strings and angle brackets. 234 ** 235 ** There are certain subtleties to this routine. The one that 236 ** comes to mind now is that backslashes on the ends of names 237 ** are silently stripped off; this is intentional. The problem 238 ** is that some versions of sndmsg (like at LBL) set the kill 239 ** character to something other than @ when reading addresses; 240 ** so people type "csvax.eric\@berkeley" -- which screws up the 241 ** berknet mailer. 242 ** 243 ** Parameters: 244 ** addr -- the name to chomp. 245 ** delim -- the delimiter for the address, normally 246 ** '\0' or ','; \0 is accepted in any case. 247 ** If '\t' then we are reading the .cf file. 248 ** pvpbuf -- place to put the saved text -- note that 249 ** the pointers are static. 250 ** delimptr -- if non-NULL, set to the location of the 251 ** terminating delimiter. 252 ** 253 ** Returns: 254 ** A pointer to a vector of tokens. 255 ** NULL on error. 256 */ 257 258 /* states and character types */ 259 # define OPR 0 /* operator */ 260 # define ATM 1 /* atom */ 261 # define QST 2 /* in quoted string */ 262 # define SPC 3 /* chewing up spaces */ 263 # define ONE 4 /* pick up one character */ 264 265 # define NSTATES 5 /* number of states */ 266 # define TYPE 017 /* mask to select state type */ 267 268 /* meta bits for table */ 269 # define M 020 /* meta character; don't pass through */ 270 # define B 040 /* cause a break */ 271 # define MB M|B /* meta-break */ 272 273 static short StateTab[NSTATES][NSTATES] = 274 { 275 /* oldst chtype> OPR ATM QST SPC ONE */ 276 /*OPR*/ OPR|B, ATM|B, QST|B, SPC|MB, ONE|B, 277 /*ATM*/ OPR|B, ATM, QST|B, SPC|MB, ONE|B, 278 /*QST*/ QST, QST, OPR, QST, QST, 279 /*SPC*/ OPR, ATM, QST, SPC|M, ONE, 280 /*ONE*/ OPR, OPR, OPR, OPR, OPR, 281 }; 282 283 # define NOCHAR -1 /* signal nothing in lookahead token */ 284 285 char ** 286 prescan(addr, delim, pvpbuf, delimptr) 287 char *addr; 288 char delim; 289 char pvpbuf[]; 290 char **delimptr; 291 { 292 register char *p; 293 register char *q; 294 register int c; 295 char **avp; 296 bool bslashmode; 297 int cmntcnt; 298 int anglecnt; 299 char *tok; 300 int state; 301 int newstate; 302 static char *av[MAXATOM+1]; 303 extern int errno; 304 305 /* make sure error messages don't have garbage on them */ 306 errno = 0; 307 308 q = pvpbuf; 309 bslashmode = FALSE; 310 cmntcnt = 0; 311 anglecnt = 0; 312 avp = av; 313 state = ATM; 314 c = NOCHAR; 315 p = addr; 316 if (tTd(22, 11)) 317 { 318 printf("prescan: "); 319 xputs(p); 320 (void) putchar('\n'); 321 } 322 323 do 324 { 325 /* read a token */ 326 tok = q; 327 for (;;) 328 { 329 /* store away any old lookahead character */ 330 if (c != NOCHAR) 331 { 332 /* see if there is room */ 333 if (q >= &pvpbuf[PSBUFSIZE - 5]) 334 { 335 usrerr("553 Address too long"); 336 if (delimptr != NULL) 337 *delimptr = p; 338 return (NULL); 339 } 340 341 /* squirrel it away */ 342 *q++ = c; 343 } 344 345 /* read a new input character */ 346 c = *p++; 347 if (c == '\0') 348 { 349 /* diagnose and patch up bad syntax */ 350 if (state == QST) 351 { 352 usrerr("553 Unbalanced '\"'"); 353 c = '"'; 354 } 355 else if (cmntcnt > 0) 356 { 357 usrerr("553 Unbalanced '('"); 358 c = ')'; 359 } 360 else if (anglecnt > 0) 361 { 362 c = '>'; 363 usrerr("553 Unbalanced '<'"); 364 } 365 else 366 break; 367 368 p--; 369 } 370 else if (c == delim && anglecnt <= 0 && 371 cmntcnt <= 0 && state != QST) 372 break; 373 374 if (tTd(22, 101)) 375 printf("c=%c, s=%d; ", c, state); 376 377 /* chew up special characters */ 378 *q = '\0'; 379 if (bslashmode) 380 { 381 /* kludge \! for naive users */ 382 if (cmntcnt > 0) 383 c = NOCHAR; 384 else if (c != '!') 385 *q++ = '\\'; 386 bslashmode = FALSE; 387 continue; 388 } 389 390 if (c == '\\') 391 { 392 bslashmode = TRUE; 393 c = NOCHAR; 394 continue; 395 } 396 else if (state == QST) 397 { 398 /* do nothing, just avoid next clauses */ 399 } 400 else if (c == '(') 401 { 402 cmntcnt++; 403 c = NOCHAR; 404 } 405 else if (c == ')') 406 { 407 if (cmntcnt <= 0) 408 { 409 usrerr("553 Unbalanced ')'"); 410 if (delimptr != NULL) 411 *delimptr = p; 412 return (NULL); 413 } 414 else 415 cmntcnt--; 416 } 417 else if (cmntcnt > 0) 418 c = NOCHAR; 419 else if (c == '<') 420 anglecnt++; 421 else if (c == '>') 422 { 423 if (anglecnt <= 0) 424 { 425 usrerr("553 Unbalanced '>'"); 426 if (delimptr != NULL) 427 *delimptr = p; 428 return (NULL); 429 } 430 anglecnt--; 431 } 432 else if (delim == ' ' && isascii(c) && isspace(c)) 433 c = ' '; 434 435 if (c == NOCHAR) 436 continue; 437 438 /* see if this is end of input */ 439 if (c == delim && anglecnt <= 0 && state != QST) 440 break; 441 442 newstate = StateTab[state][toktype(c)]; 443 if (tTd(22, 101)) 444 printf("ns=%02o\n", newstate); 445 state = newstate & TYPE; 446 if (bitset(M, newstate)) 447 c = NOCHAR; 448 if (bitset(B, newstate)) 449 break; 450 } 451 452 /* new token */ 453 if (tok != q) 454 { 455 *q++ = '\0'; 456 if (tTd(22, 36)) 457 { 458 printf("tok="); 459 xputs(tok); 460 (void) putchar('\n'); 461 } 462 if (avp >= &av[MAXATOM]) 463 { 464 syserr("553 prescan: too many tokens"); 465 if (delimptr != NULL) 466 *delimptr = p; 467 return (NULL); 468 } 469 *avp++ = tok; 470 } 471 } while (c != '\0' && (c != delim || anglecnt > 0)); 472 *avp = NULL; 473 p--; 474 if (delimptr != NULL) 475 *delimptr = p; 476 if (tTd(22, 12)) 477 { 478 printf("prescan==>"); 479 printav(av); 480 } 481 if (av[0] == NULL) 482 return (NULL); 483 return (av); 484 } 485 /* 486 ** TOKTYPE -- return token type 487 ** 488 ** Parameters: 489 ** c -- the character in question. 490 ** 491 ** Returns: 492 ** Its type. 493 ** 494 ** Side Effects: 495 ** none. 496 */ 497 498 toktype(c) 499 register int c; 500 { 501 static char buf[50]; 502 static bool firstime = TRUE; 503 504 if (firstime) 505 { 506 firstime = FALSE; 507 expand("\201o", buf, &buf[sizeof buf - 1], CurEnv); 508 (void) strcat(buf, DELIMCHARS); 509 } 510 c &= 0377; 511 if (c == MATCHCLASS || c == MATCHREPL || c == MATCHNCLASS) 512 return (ONE); 513 if (c == '"') 514 return (QST); 515 if ((c & 0340) == 0200) 516 return (OPR); 517 if (!isascii(c)) 518 return (ATM); 519 if (isspace(c) || c == ')') 520 return (SPC); 521 if (strchr(buf, c) != NULL) 522 return (OPR); 523 return (ATM); 524 } 525 /* 526 ** REWRITE -- apply rewrite rules to token vector. 527 ** 528 ** This routine is an ordered production system. Each rewrite 529 ** rule has a LHS (called the pattern) and a RHS (called the 530 ** rewrite); 'rwr' points the the current rewrite rule. 531 ** 532 ** For each rewrite rule, 'avp' points the address vector we 533 ** are trying to match against, and 'pvp' points to the pattern. 534 ** If pvp points to a special match value (MATCHZANY, MATCHANY, 535 ** MATCHONE, MATCHCLASS, MATCHNCLASS) then the address in avp 536 ** matched is saved away in the match vector (pointed to by 'mvp'). 537 ** 538 ** When a match between avp & pvp does not match, we try to 539 ** back out. If we back up over MATCHONE, MATCHCLASS, or MATCHNCLASS 540 ** we must also back out the match in mvp. If we reach a 541 ** MATCHANY or MATCHZANY we just extend the match and start 542 ** over again. 543 ** 544 ** When we finally match, we rewrite the address vector 545 ** and try over again. 546 ** 547 ** Parameters: 548 ** pvp -- pointer to token vector. 549 ** 550 ** Returns: 551 ** none. 552 ** 553 ** Side Effects: 554 ** pvp is modified. 555 */ 556 557 struct match 558 { 559 char **first; /* first token matched */ 560 char **last; /* last token matched */ 561 }; 562 563 # define MAXMATCH 9 /* max params per rewrite */ 564 565 566 rewrite(pvp, ruleset) 567 char **pvp; 568 int ruleset; 569 { 570 register char *ap; /* address pointer */ 571 register char *rp; /* rewrite pointer */ 572 register char **avp; /* address vector pointer */ 573 register char **rvp; /* rewrite vector pointer */ 574 register struct match *mlp; /* cur ptr into mlist */ 575 register struct rewrite *rwr; /* pointer to current rewrite rule */ 576 struct match mlist[MAXMATCH]; /* stores match on LHS */ 577 char *npvp[MAXATOM+1]; /* temporary space for rebuild */ 578 579 if (OpMode == MD_TEST || tTd(21, 2)) 580 { 581 printf("rewrite: ruleset %2d input:", ruleset); 582 printav(pvp); 583 } 584 if (ruleset < 0 || ruleset >= MAXRWSETS) 585 { 586 syserr("554 rewrite: illegal ruleset number %d", ruleset); 587 return; 588 } 589 if (pvp == NULL) 590 return; 591 592 /* 593 ** Run through the list of rewrite rules, applying 594 ** any that match. 595 */ 596 597 for (rwr = RewriteRules[ruleset]; rwr != NULL; ) 598 { 599 int loopcount = 0; 600 601 if (tTd(21, 12)) 602 { 603 printf("-----trying rule:"); 604 printav(rwr->r_lhs); 605 } 606 607 /* try to match on this rule */ 608 mlp = mlist; 609 rvp = rwr->r_lhs; 610 avp = pvp; 611 while ((ap = *avp) != NULL || *rvp != NULL) 612 { 613 if (++loopcount > 100) 614 { 615 syserr("554 Infinite loop in ruleset %d", ruleset); 616 printf("workspace: "); 617 printav(pvp); 618 break; 619 } 620 rp = *rvp; 621 if (tTd(21, 35)) 622 { 623 printf("rp="); 624 xputs(rp); 625 printf(", ap="); 626 xputs(ap); 627 printf("\n"); 628 } 629 if (rp == NULL) 630 { 631 /* end-of-pattern before end-of-address */ 632 goto backup; 633 } 634 if (ap == NULL && (*rp & 0377) != MATCHZANY && 635 (*rp & 0377) != CANONHOST) 636 { 637 /* end-of-input */ 638 break; 639 } 640 641 switch (*rp & 0377) 642 { 643 register STAB *s; 644 645 case MATCHCLASS: 646 case MATCHNCLASS: 647 /* match any token in (not in) a class */ 648 s = stab(ap, ST_CLASS, ST_FIND); 649 if (s == NULL || !bitnset(rp[1], s->s_class)) 650 { 651 if ((*rp & 0377) == MATCHCLASS) 652 goto backup; 653 } 654 else if ((*rp & 0377) == MATCHNCLASS) 655 goto backup; 656 657 /* explicit fall-through */ 658 659 case MATCHONE: 660 case MATCHANY: 661 /* match exactly one token */ 662 mlp->first = avp; 663 mlp->last = avp++; 664 mlp++; 665 break; 666 667 case MATCHZANY: 668 /* match zero or more tokens */ 669 mlp->first = avp; 670 mlp->last = avp - 1; 671 mlp++; 672 break; 673 674 case CANONHOST: 675 /* match zero tokens */ 676 break; 677 678 default: 679 /* must have exact match */ 680 if (strcasecmp(rp, ap)) 681 goto backup; 682 avp++; 683 break; 684 } 685 686 /* successful match on this token */ 687 rvp++; 688 continue; 689 690 backup: 691 /* match failed -- back up */ 692 while (--rvp >= rwr->r_lhs) 693 { 694 rp = *rvp; 695 if ((*rp & 0377) == MATCHANY || 696 (*rp & 0377) == MATCHZANY) 697 { 698 /* extend binding and continue */ 699 avp = ++mlp[-1].last; 700 avp++; 701 rvp++; 702 break; 703 } 704 avp--; 705 if ((*rp & 0377) == MATCHONE || 706 (*rp & 0377) == MATCHCLASS || 707 (*rp & 0377) == MATCHNCLASS) 708 { 709 /* back out binding */ 710 mlp--; 711 } 712 } 713 714 if (rvp < rwr->r_lhs) 715 { 716 /* total failure to match */ 717 break; 718 } 719 } 720 721 /* 722 ** See if we successfully matched 723 */ 724 725 if (rvp < rwr->r_lhs || *rvp != NULL) 726 { 727 if (tTd(21, 10)) 728 printf("----- rule fails\n"); 729 rwr = rwr->r_next; 730 continue; 731 } 732 733 rvp = rwr->r_rhs; 734 if (tTd(21, 12)) 735 { 736 printf("-----rule matches:"); 737 printav(rvp); 738 } 739 740 rp = *rvp; 741 if ((*rp & 0377) == CANONUSER) 742 { 743 rvp++; 744 rwr = rwr->r_next; 745 } 746 else if ((*rp & 0377) == CANONHOST) 747 { 748 rvp++; 749 rwr = NULL; 750 } 751 else if ((*rp & 0377) == CANONNET) 752 rwr = NULL; 753 754 /* substitute */ 755 for (avp = npvp; *rvp != NULL; rvp++) 756 { 757 register struct match *m; 758 register char **pp; 759 760 rp = *rvp; 761 if ((*rp & 0377) == MATCHREPL) 762 { 763 /* substitute from LHS */ 764 m = &mlist[rp[1] - '1']; 765 if (m < mlist || m >= mlp) 766 { 767 syserr("554 rewrite: ruleset %d: replacement $%c out of bounds", 768 ruleset, rp[1]); 769 return; 770 } 771 if (tTd(21, 15)) 772 { 773 printf("$%c:", rp[1]); 774 pp = m->first; 775 while (pp <= m->last) 776 { 777 printf(" %x=\"", *pp); 778 (void) fflush(stdout); 779 printf("%s\"", *pp++); 780 } 781 printf("\n"); 782 } 783 pp = m->first; 784 while (pp <= m->last) 785 { 786 if (avp >= &npvp[MAXATOM]) 787 { 788 syserr("554 rewrite: expansion too long"); 789 return; 790 } 791 *avp++ = *pp++; 792 } 793 } 794 else 795 { 796 /* vanilla replacement */ 797 if (avp >= &npvp[MAXATOM]) 798 { 799 toolong: 800 syserr("554 rewrite: expansion too long"); 801 return; 802 } 803 *avp++ = rp; 804 } 805 } 806 *avp++ = NULL; 807 808 /* 809 ** Check for any hostname/keyword lookups. 810 */ 811 812 for (rvp = npvp; *rvp != NULL; rvp++) 813 { 814 char **hbrvp; 815 char **xpvp; 816 int trsize; 817 char *olddelimchar; 818 char *replac; 819 int endtoken; 820 STAB *map; 821 char *mapname; 822 char **key_rvp; 823 char **arg_rvp; 824 char **default_rvp; 825 char buf[MAXNAME + 1]; 826 char *pvpb1[MAXATOM + 1]; 827 char *argvect[10]; 828 char pvpbuf[PSBUFSIZE]; 829 830 if ((**rvp & 0377) != HOSTBEGIN && 831 (**rvp & 0377) != LOOKUPBEGIN) 832 continue; 833 834 /* 835 ** Got a hostname/keyword lookup. 836 ** 837 ** This could be optimized fairly easily. 838 */ 839 840 hbrvp = rvp; 841 if ((**rvp & 0377) == HOSTBEGIN) 842 { 843 endtoken = HOSTEND; 844 mapname = "host"; 845 } 846 else 847 { 848 endtoken = LOOKUPEND; 849 mapname = *++rvp; 850 } 851 map = stab(mapname, ST_MAP, ST_FIND); 852 if (map == NULL) 853 syserr("554 rewrite: map %s not found", mapname); 854 855 /* extract the match part */ 856 key_rvp = ++rvp; 857 default_rvp = NULL; 858 arg_rvp = argvect; 859 xpvp = NULL; 860 replac = pvpbuf; 861 while (*rvp != NULL && (**rvp & 0377) != endtoken) 862 { 863 int nodetype = **rvp & 0377; 864 865 if (nodetype != CANONHOST && nodetype != CANONUSER) 866 { 867 rvp++; 868 continue; 869 } 870 871 *rvp++ = NULL; 872 873 if (xpvp != NULL) 874 { 875 cataddr(xpvp, replac, 876 &pvpbuf[sizeof pvpbuf] - replac, 877 '\0'); 878 *++arg_rvp = replac; 879 replac += strlen(replac) + 1; 880 xpvp = NULL; 881 } 882 switch (nodetype) 883 { 884 case CANONHOST: 885 xpvp = rvp; 886 break; 887 888 case CANONUSER: 889 default_rvp = rvp; 890 break; 891 } 892 } 893 if (*rvp != NULL) 894 *rvp++ = NULL; 895 if (xpvp != NULL) 896 { 897 cataddr(xpvp, replac, 898 &pvpbuf[sizeof pvpbuf] - replac, 899 '\0'); 900 *++arg_rvp = replac; 901 } 902 *++arg_rvp = NULL; 903 904 /* save the remainder of the input string */ 905 trsize = (int) (avp - rvp + 1) * sizeof *rvp; 906 bcopy((char *) rvp, (char *) pvpb1, trsize); 907 908 /* look it up */ 909 cataddr(key_rvp, buf, sizeof buf, '\0'); 910 argvect[0] = buf; 911 if (map != NULL && bitset(MF_VALID, map->s_map.map_flags)) 912 { 913 int bsize = sizeof buf - 1; 914 915 if (map->s_map.map_app != NULL) 916 bsize -= strlen(map->s_map.map_app); 917 if (tTd(60, 1)) 918 printf("map_lookup(%s, %s) => ", 919 mapname, buf); 920 replac = (*map->s_map.map_class->map_lookup)(&map->s_map, 921 buf, sizeof buf - 1, argvect); 922 if (replac != NULL && map->s_map.map_app != NULL) 923 strcat(replac, map->s_map.map_app); 924 if (tTd(60, 1)) 925 printf("%s\n", replac ? replac : "NOT FOUND"); 926 } 927 else 928 replac = NULL; 929 930 /* if no replacement, use default */ 931 if (replac == NULL && default_rvp != NULL) 932 { 933 char buf2[sizeof buf]; 934 935 /* rewrite the default with % translations */ 936 cataddr(default_rvp, buf2, sizeof buf2, '\0'); 937 map_rewrite(buf2, sizeof buf2, buf, sizeof buf, 938 argvect); 939 replac = buf; 940 } 941 942 if (replac == NULL) 943 { 944 xpvp = key_rvp; 945 } 946 else 947 { 948 /* scan the new replacement */ 949 xpvp = prescan(replac, '\0', pvpbuf, NULL); 950 if (xpvp == NULL) 951 { 952 /* prescan already printed error */ 953 return; 954 } 955 } 956 957 /* append it to the token list */ 958 for (avp = hbrvp; *xpvp != NULL; xpvp++) 959 { 960 *avp++ = newstr(*xpvp); 961 if (avp >= &npvp[MAXATOM]) 962 goto toolong; 963 } 964 965 /* restore the old trailing information */ 966 for (xpvp = pvpb1; (*avp++ = *xpvp++) != NULL; ) 967 if (avp >= &npvp[MAXATOM]) 968 goto toolong; 969 970 break; 971 } 972 973 /* 974 ** Check for subroutine calls. 975 */ 976 977 if (*npvp != NULL && (**npvp & 0377) == CALLSUBR) 978 { 979 bcopy((char *) &npvp[2], (char *) pvp, 980 (int) (avp - npvp - 2) * sizeof *avp); 981 if (tTd(21, 3)) 982 printf("-----callsubr %s\n", npvp[1]); 983 rewrite(pvp, atoi(npvp[1])); 984 } 985 else 986 { 987 bcopy((char *) npvp, (char *) pvp, 988 (int) (avp - npvp) * sizeof *avp); 989 } 990 if (tTd(21, 4)) 991 { 992 printf("rewritten as:"); 993 printav(pvp); 994 } 995 } 996 997 if (OpMode == MD_TEST || tTd(21, 2)) 998 { 999 printf("rewrite: ruleset %2d returns:", ruleset); 1000 printav(pvp); 1001 } 1002 } 1003 /* 1004 ** BUILDADDR -- build address from token vector. 1005 ** 1006 ** Parameters: 1007 ** tv -- token vector. 1008 ** a -- pointer to address descriptor to fill. 1009 ** If NULL, one will be allocated. 1010 ** 1011 ** Returns: 1012 ** NULL if there was an error. 1013 ** 'a' otherwise. 1014 ** 1015 ** Side Effects: 1016 ** fills in 'a' 1017 */ 1018 1019 struct errcodes 1020 { 1021 char *ec_name; /* name of error code */ 1022 int ec_code; /* numeric code */ 1023 } ErrorCodes[] = 1024 { 1025 "usage", EX_USAGE, 1026 "nouser", EX_NOUSER, 1027 "nohost", EX_NOHOST, 1028 "unavailable", EX_UNAVAILABLE, 1029 "software", EX_SOFTWARE, 1030 "tempfail", EX_TEMPFAIL, 1031 "protocol", EX_PROTOCOL, 1032 #ifdef EX_CONFIG 1033 "config", EX_CONFIG, 1034 #endif 1035 NULL, EX_UNAVAILABLE, 1036 }; 1037 1038 ADDRESS * 1039 buildaddr(tv, a) 1040 register char **tv; 1041 register ADDRESS *a; 1042 { 1043 struct mailer **mp; 1044 register struct mailer *m; 1045 char *bp; 1046 int spaceleft; 1047 static char buf[MAXNAME]; 1048 1049 if (a == NULL) 1050 a = (ADDRESS *) xalloc(sizeof *a); 1051 bzero((char *) a, sizeof *a); 1052 1053 /* figure out what net/mailer to use */ 1054 if ((**tv & 0377) != CANONNET) 1055 { 1056 syserr("554 buildaddr: no net"); 1057 return (NULL); 1058 } 1059 tv++; 1060 if (strcasecmp(*tv, "error") == 0) 1061 { 1062 if ((**++tv & 0377) == CANONHOST) 1063 { 1064 register struct errcodes *ep; 1065 1066 if (isascii(**++tv) && isdigit(**tv)) 1067 { 1068 setstat(atoi(*tv)); 1069 } 1070 else 1071 { 1072 for (ep = ErrorCodes; ep->ec_name != NULL; ep++) 1073 if (strcasecmp(ep->ec_name, *tv) == 0) 1074 break; 1075 setstat(ep->ec_code); 1076 } 1077 tv++; 1078 } 1079 if ((**tv & 0377) != CANONUSER) 1080 syserr("554 buildaddr: error: no user"); 1081 cataddr(++tv, buf, sizeof buf, ' '); 1082 stripquotes(buf); 1083 usrerr(buf); 1084 return (NULL); 1085 } 1086 1087 for (mp = Mailer; (m = *mp++) != NULL; ) 1088 { 1089 if (strcasecmp(m->m_name, *tv) == 0) 1090 break; 1091 } 1092 if (m == NULL) 1093 { 1094 syserr("554 buildaddr: unknown mailer %s", *tv); 1095 return (NULL); 1096 } 1097 a->q_mailer = m; 1098 1099 /* figure out what host (if any) */ 1100 tv++; 1101 if ((**tv & 0377) == CANONHOST) 1102 { 1103 bp = buf; 1104 spaceleft = sizeof buf - 1; 1105 while (*++tv != NULL && (**tv & 0377) != CANONUSER) 1106 { 1107 int i = strlen(*tv); 1108 1109 if (i > spaceleft) 1110 { 1111 /* out of space for this address */ 1112 if (spaceleft >= 0) 1113 syserr("554 buildaddr: host too long (%.40s...)", 1114 buf); 1115 i = spaceleft; 1116 spaceleft = 0; 1117 } 1118 if (i <= 0) 1119 continue; 1120 bcopy(*tv, bp, i); 1121 bp += i; 1122 spaceleft -= i; 1123 } 1124 *bp = '\0'; 1125 a->q_host = newstr(buf); 1126 } 1127 else 1128 { 1129 if (!bitnset(M_LOCALMAILER, m->m_flags)) 1130 { 1131 syserr("554 buildaddr: no host"); 1132 return (NULL); 1133 } 1134 a->q_host = NULL; 1135 } 1136 1137 /* figure out the user */ 1138 if (*tv == NULL || (**tv & 0377) != CANONUSER) 1139 { 1140 syserr("554 buildaddr: no user"); 1141 return (NULL); 1142 } 1143 tv++; 1144 1145 /* do special mapping for local mailer */ 1146 if (m == LocalMailer && *tv != NULL) 1147 { 1148 register char *p = *tv; 1149 1150 if (*p == '"') 1151 p++; 1152 if (*p == '|') 1153 a->q_mailer = m = ProgMailer; 1154 else if (*p == '/') 1155 a->q_mailer = m = FileMailer; 1156 else if (*p == ':') 1157 { 1158 /* may be :include: */ 1159 cataddr(tv, buf, sizeof buf, '\0'); 1160 stripquotes(buf); 1161 if (strncasecmp(buf, ":include:", 9) == 0) 1162 { 1163 /* if :include:, don't need further rewriting */ 1164 a->q_mailer = m = InclMailer; 1165 a->q_user = &buf[9]; 1166 return (a); 1167 } 1168 } 1169 } 1170 1171 if (m == LocalMailer && *tv != NULL && strcmp(*tv, "@") == 0) 1172 { 1173 tv++; 1174 a->q_flags |= QNOTREMOTE; 1175 } 1176 1177 /* do cleanup of final address */ 1178 rewrite(tv, 4); 1179 1180 /* save the result for the command line/RCPT argument */ 1181 cataddr(tv, buf, sizeof buf, '\0'); 1182 a->q_user = buf; 1183 1184 /* 1185 ** Do mapping to lower case as requested by mailer 1186 */ 1187 1188 if (a->q_host != NULL && !bitnset(M_HST_UPPER, m->m_flags)) 1189 makelower(a->q_host); 1190 if (!bitnset(M_USR_UPPER, m->m_flags)) 1191 makelower(a->q_user); 1192 1193 return (a); 1194 } 1195 /* 1196 ** CATADDR -- concatenate pieces of addresses (putting in <LWSP> subs) 1197 ** 1198 ** Parameters: 1199 ** pvp -- parameter vector to rebuild. 1200 ** buf -- buffer to build the string into. 1201 ** sz -- size of buf. 1202 ** spacesub -- the space separator character; if null, 1203 ** use SpaceSub. 1204 ** 1205 ** Returns: 1206 ** none. 1207 ** 1208 ** Side Effects: 1209 ** Destroys buf. 1210 */ 1211 1212 cataddr(pvp, buf, sz, spacesub) 1213 char **pvp; 1214 char *buf; 1215 register int sz; 1216 char spacesub; 1217 { 1218 bool oatomtok = FALSE; 1219 bool natomtok = FALSE; 1220 register int i; 1221 register char *p; 1222 1223 if (spacesub == '\0') 1224 spacesub = SpaceSub; 1225 1226 if (pvp == NULL) 1227 { 1228 (void) strcpy(buf, ""); 1229 return; 1230 } 1231 p = buf; 1232 sz -= 2; 1233 while (*pvp != NULL && (i = strlen(*pvp)) < sz) 1234 { 1235 natomtok = (toktype(**pvp) == ATM); 1236 if (oatomtok && natomtok) 1237 *p++ = spacesub; 1238 (void) strcpy(p, *pvp); 1239 oatomtok = natomtok; 1240 p += i; 1241 sz -= i + 1; 1242 pvp++; 1243 } 1244 *p = '\0'; 1245 } 1246 /* 1247 ** SAMEADDR -- Determine if two addresses are the same 1248 ** 1249 ** This is not just a straight comparison -- if the mailer doesn't 1250 ** care about the host we just ignore it, etc. 1251 ** 1252 ** Parameters: 1253 ** a, b -- pointers to the internal forms to compare. 1254 ** 1255 ** Returns: 1256 ** TRUE -- they represent the same mailbox. 1257 ** FALSE -- they don't. 1258 ** 1259 ** Side Effects: 1260 ** none. 1261 */ 1262 1263 bool 1264 sameaddr(a, b) 1265 register ADDRESS *a; 1266 register ADDRESS *b; 1267 { 1268 /* if they don't have the same mailer, forget it */ 1269 if (a->q_mailer != b->q_mailer) 1270 return (FALSE); 1271 1272 /* if the user isn't the same, we can drop out */ 1273 if (strcmp(a->q_user, b->q_user) != 0) 1274 return (FALSE); 1275 1276 /* if we have good uids for both but the differ, these are different */ 1277 if (bitset(QGOODUID, a->q_flags & b->q_flags) && a->q_uid != b->q_uid) 1278 return (FALSE); 1279 1280 /* otherwise compare hosts (but be careful for NULL ptrs) */ 1281 if (a->q_host == b->q_host) 1282 { 1283 /* probably both null pointers */ 1284 return (TRUE); 1285 } 1286 if (a->q_host == NULL || b->q_host == NULL) 1287 { 1288 /* only one is a null pointer */ 1289 return (FALSE); 1290 } 1291 if (strcmp(a->q_host, b->q_host) != 0) 1292 return (FALSE); 1293 1294 return (TRUE); 1295 } 1296 /* 1297 ** PRINTADDR -- print address (for debugging) 1298 ** 1299 ** Parameters: 1300 ** a -- the address to print 1301 ** follow -- follow the q_next chain. 1302 ** 1303 ** Returns: 1304 ** none. 1305 ** 1306 ** Side Effects: 1307 ** none. 1308 */ 1309 1310 printaddr(a, follow) 1311 register ADDRESS *a; 1312 bool follow; 1313 { 1314 bool first = TRUE; 1315 register MAILER *m; 1316 MAILER pseudomailer; 1317 1318 while (a != NULL) 1319 { 1320 first = FALSE; 1321 printf("%x=", a); 1322 (void) fflush(stdout); 1323 1324 /* find the mailer -- carefully */ 1325 m = a->q_mailer; 1326 if (m == NULL) 1327 { 1328 m = &pseudomailer; 1329 m->m_mno = -1; 1330 m->m_name = "NULL"; 1331 } 1332 1333 printf("%s:\n\tmailer %d (%s), host `%s', user `%s', ruser `%s'\n", 1334 a->q_paddr, m->m_mno, m->m_name, 1335 a->q_host, a->q_user, a->q_ruser? a->q_ruser: "<null>"); 1336 printf("\tnext=%x, flags=%o, alias %x\n", a->q_next, a->q_flags, 1337 a->q_alias); 1338 printf("\thome=\"%s\", fullname=\"%s\"\n", a->q_home, 1339 a->q_fullname); 1340 1341 if (!follow) 1342 return; 1343 a = a->q_next; 1344 } 1345 if (first) 1346 printf("[NULL]\n"); 1347 } 1348 1349 /* 1350 ** REMOTENAME -- return the name relative to the current mailer 1351 ** 1352 ** Parameters: 1353 ** name -- the name to translate. 1354 ** m -- the mailer that we want to do rewriting relative 1355 ** to. 1356 ** senderaddress -- if set, uses the sender rewriting rules 1357 ** rather than the recipient rewriting rules. 1358 ** header -- set if this address is in the header, rather 1359 ** than an envelope header. 1360 ** canonical -- if set, strip out any comment information, 1361 ** etc. 1362 ** adddomain -- if set, OK to do domain extension. 1363 ** e -- the current envelope. 1364 ** 1365 ** Returns: 1366 ** the text string representing this address relative to 1367 ** the receiving mailer. 1368 ** 1369 ** Side Effects: 1370 ** none. 1371 ** 1372 ** Warnings: 1373 ** The text string returned is tucked away locally; 1374 ** copy it if you intend to save it. 1375 */ 1376 1377 char * 1378 remotename(name, m, senderaddress, header, canonical, adddomain, e) 1379 char *name; 1380 struct mailer *m; 1381 bool senderaddress; 1382 bool header; 1383 bool canonical; 1384 bool adddomain; 1385 register ENVELOPE *e; 1386 { 1387 register char **pvp; 1388 char *fancy; 1389 extern char *macvalue(); 1390 char *oldg = macvalue('g', e); 1391 int rwset; 1392 static char buf[MAXNAME]; 1393 char lbuf[MAXNAME]; 1394 char pvpbuf[PSBUFSIZE]; 1395 extern char **prescan(); 1396 extern char *crackaddr(); 1397 1398 if (tTd(12, 1)) 1399 printf("remotename(%s)\n", name); 1400 1401 /* don't do anything if we are tagging it as special */ 1402 if (senderaddress) 1403 rwset = header ? m->m_sh_rwset : m->m_se_rwset; 1404 else 1405 rwset = header ? m->m_rh_rwset : m->m_re_rwset; 1406 if (rwset < 0) 1407 return (name); 1408 1409 /* 1410 ** Do a heuristic crack of this name to extract any comment info. 1411 ** This will leave the name as a comment and a $g macro. 1412 */ 1413 1414 if (canonical || bitnset(M_NOCOMMENT, m->m_flags)) 1415 fancy = "\201g"; 1416 else 1417 fancy = crackaddr(name); 1418 1419 /* 1420 ** Turn the name into canonical form. 1421 ** Normally this will be RFC 822 style, i.e., "user@domain". 1422 ** If this only resolves to "user", and the "C" flag is 1423 ** specified in the sending mailer, then the sender's 1424 ** domain will be appended. 1425 */ 1426 1427 pvp = prescan(name, '\0', pvpbuf, NULL); 1428 if (pvp == NULL) 1429 return (name); 1430 rewrite(pvp, 3); 1431 if (adddomain && e->e_fromdomain != NULL) 1432 { 1433 /* append from domain to this address */ 1434 register char **pxp = pvp; 1435 1436 /* see if there is an "@domain" in the current name */ 1437 while (*pxp != NULL && strcmp(*pxp, "@") != 0) 1438 pxp++; 1439 if (*pxp == NULL) 1440 { 1441 /* no.... append the "@domain" from the sender */ 1442 register char **qxq = e->e_fromdomain; 1443 1444 while ((*pxp++ = *qxq++) != NULL) 1445 continue; 1446 rewrite(pvp, 3); 1447 } 1448 } 1449 1450 /* 1451 ** Do more specific rewriting. 1452 ** Rewrite using ruleset 1 or 2 depending on whether this is 1453 ** a sender address or not. 1454 ** Then run it through any receiving-mailer-specific rulesets. 1455 */ 1456 1457 if (senderaddress) 1458 rewrite(pvp, 1); 1459 else 1460 rewrite(pvp, 2); 1461 if (rwset > 0) 1462 rewrite(pvp, rwset); 1463 1464 /* 1465 ** Do any final sanitation the address may require. 1466 ** This will normally be used to turn internal forms 1467 ** (e.g., user@host.LOCAL) into external form. This 1468 ** may be used as a default to the above rules. 1469 */ 1470 1471 rewrite(pvp, 4); 1472 1473 /* 1474 ** Now restore the comment information we had at the beginning. 1475 */ 1476 1477 cataddr(pvp, lbuf, sizeof lbuf, '\0'); 1478 define('g', lbuf, e); 1479 expand(fancy, buf, &buf[sizeof buf - 1], e); 1480 define('g', oldg, e); 1481 1482 if (tTd(12, 1)) 1483 printf("remotename => `%s'\n", buf); 1484 return (buf); 1485 } 1486 /* 1487 ** MAPLOCALUSER -- run local username through ruleset 5 for final redirection 1488 ** 1489 ** Parameters: 1490 ** a -- the address to map (but just the user name part). 1491 ** sendq -- the sendq in which to install any replacement 1492 ** addresses. 1493 ** 1494 ** Returns: 1495 ** none. 1496 */ 1497 1498 maplocaluser(a, sendq, e) 1499 register ADDRESS *a; 1500 ADDRESS **sendq; 1501 ENVELOPE *e; 1502 { 1503 register char **pvp; 1504 register ADDRESS *a1 = NULL; 1505 auto char *delimptr; 1506 char pvpbuf[PSBUFSIZE]; 1507 1508 if (tTd(29, 1)) 1509 { 1510 printf("maplocaluser: "); 1511 printaddr(a, FALSE); 1512 } 1513 pvp = prescan(a->q_user, '\0', pvpbuf, &delimptr); 1514 if (pvp == NULL) 1515 return; 1516 1517 rewrite(pvp, 5); 1518 if (pvp[0] == NULL || (pvp[0][0] & 0377) != CANONNET) 1519 return; 1520 1521 /* if non-null, mailer destination specified -- has it changed? */ 1522 a1 = buildaddr(pvp, NULL); 1523 if (a1 == NULL || sameaddr(a, a1)) 1524 return; 1525 1526 /* mark old address as dead; insert new address */ 1527 a->q_flags |= QDONTSEND; 1528 if (tTd(29, 5)) 1529 { 1530 printf("maplocaluser: QDONTSEND "); 1531 printaddr(a, FALSE); 1532 } 1533 a1->q_alias = a; 1534 allocaddr(a1, 1, NULL, delimptr); 1535 (void) recipient(a1, sendq, e); 1536 } 1537