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[] = "@(#)headers.c 8.55 (Berkeley) 04/09/95"; 11 #endif /* not lint */ 12 13 # include <errno.h> 14 # include "sendmail.h" 15 16 /* 17 ** CHOMPHEADER -- process and save a header line. 18 ** 19 ** Called by collect and by readcf to deal with header lines. 20 ** 21 ** Parameters: 22 ** line -- header as a text line. 23 ** def -- if set, this is a default value. 24 ** hdrp -- a pointer to the place to save the header. 25 ** e -- the envelope including this header. 26 ** 27 ** Returns: 28 ** flags for this header. 29 ** 30 ** Side Effects: 31 ** The header is saved on the header list. 32 ** Contents of 'line' are destroyed. 33 */ 34 35 chompheader(line, def, hdrp, e) 36 char *line; 37 bool def; 38 HDR **hdrp; 39 register ENVELOPE *e; 40 { 41 register char *p; 42 register HDR *h; 43 HDR **hp; 44 char *fname; 45 char *fvalue; 46 struct hdrinfo *hi; 47 bool cond = FALSE; 48 bool headeronly; 49 BITMAP mopts; 50 char buf[MAXNAME + 1]; 51 52 if (tTd(31, 6)) 53 printf("chompheader: %s\n", line); 54 55 headeronly = hdrp != NULL; 56 if (!headeronly) 57 hdrp = &e->e_header; 58 59 /* strip off options */ 60 clrbitmap(mopts); 61 p = line; 62 if (*p == '?') 63 { 64 /* have some */ 65 register char *q = strchr(p + 1, *p); 66 67 if (q != NULL) 68 { 69 *q++ = '\0'; 70 while (*++p != '\0') 71 setbitn(*p, mopts); 72 p = q; 73 } 74 else 75 syserr("553 header syntax error, line \"%s\"", line); 76 cond = TRUE; 77 } 78 79 /* find canonical name */ 80 fname = p; 81 while (isascii(*p) && isgraph(*p) && *p != ':') 82 p++; 83 fvalue = p; 84 while (isascii(*p) && isspace(*p)) 85 p++; 86 if (*p++ != ':' || fname == fvalue) 87 { 88 syserr("553 header syntax error, line \"%s\"", line); 89 return (0); 90 } 91 *fvalue = '\0'; 92 fvalue = p; 93 94 /* strip field value on front */ 95 if (*fvalue == ' ') 96 fvalue++; 97 98 /* see if it is a known type */ 99 for (hi = HdrInfo; hi->hi_field != NULL; hi++) 100 { 101 if (strcasecmp(hi->hi_field, fname) == 0) 102 break; 103 } 104 105 if (tTd(31, 9)) 106 { 107 if (hi->hi_field == NULL) 108 printf("no header match\n"); 109 else 110 printf("header match, hi_flags=%x\n", hi->hi_flags); 111 } 112 113 /* see if this is a resent message */ 114 if (!def && !headeronly && bitset(H_RESENT, hi->hi_flags)) 115 e->e_flags |= EF_RESENT; 116 117 /* if this is an Errors-To: header keep track of it now */ 118 if (UseErrorsTo && !def && !headeronly && 119 bitset(H_ERRORSTO, hi->hi_flags)) 120 (void) sendtolist(fvalue, NULLADDR, &e->e_errorqueue, 0, e); 121 122 /* if this means "end of header" quit now */ 123 if (bitset(H_EOH, hi->hi_flags)) 124 return (hi->hi_flags); 125 126 /* 127 ** Drop explicit From: if same as what we would generate. 128 ** This is to make MH (which doesn't always give a full name) 129 ** insert the full name information in all circumstances. 130 */ 131 132 p = "resent-from"; 133 if (!bitset(EF_RESENT, e->e_flags)) 134 p += 7; 135 if (!def && !headeronly && !bitset(EF_QUEUERUN, e->e_flags) && 136 strcasecmp(fname, p) == 0) 137 { 138 if (tTd(31, 2)) 139 { 140 printf("comparing header from (%s) against default (%s or %s)\n", 141 fvalue, e->e_from.q_paddr, e->e_from.q_user); 142 } 143 if (e->e_from.q_paddr != NULL && 144 (strcmp(fvalue, e->e_from.q_paddr) == 0 || 145 strcmp(fvalue, e->e_from.q_user) == 0)) 146 return (hi->hi_flags); 147 #ifdef MAYBENEXTRELEASE /* XXX UNTESTED XXX UNTESTED XXX UNTESTED XXX */ 148 #ifdef USERDB 149 else 150 { 151 auto ADDRESS a; 152 char *fancy; 153 bool oldSuprErrs = SuprErrs; 154 extern char *crackaddr(); 155 extern char *udbsender(); 156 157 /* 158 ** Try doing USERDB rewriting even on fully commented 159 ** names; this saves the "comment" information (such 160 ** as full name) and rewrites the electronic part. 161 ** 162 ** XXX This code doesn't belong here -- parsing should 163 ** XXX not be done during collect() phase because 164 ** XXX error messages can confuse the SMTP phase. 165 ** XXX Setting SuprErrs is a crude hack around this 166 ** XXX problem. 167 */ 168 169 if (OpMode == MD_SMTP || OpMode == MD_ARPAFTP) 170 SuprErrs = TRUE; 171 fancy = crackaddr(fvalue); 172 if (parseaddr(fvalue, &a, RF_COPYNONE, '\0', NULL, e) != NULL && 173 bitnset(M_CHECKUDB, a.q_mailer->m_flags) && 174 (p = udbsender(a.q_user)) != NULL) 175 { 176 char *oldg = macvalue('g', e); 177 178 define('g', p, e); 179 expand(fancy, buf, sizeof buf, e); 180 define('g', oldg, e); 181 fvalue = buf; 182 } 183 SuprErrs = oldSuprErrs; 184 } 185 #endif 186 #endif 187 } 188 189 /* delete default value for this header */ 190 for (hp = hdrp; (h = *hp) != NULL; hp = &h->h_link) 191 { 192 if (strcasecmp(fname, h->h_field) == 0 && 193 bitset(H_DEFAULT, h->h_flags) && 194 !bitset(H_FORCE, h->h_flags)) 195 h->h_value = NULL; 196 } 197 198 /* create a new node */ 199 h = (HDR *) xalloc(sizeof *h); 200 h->h_field = newstr(fname); 201 h->h_value = newstr(fvalue); 202 h->h_link = NULL; 203 bcopy((char *) mopts, (char *) h->h_mflags, sizeof mopts); 204 *hp = h; 205 h->h_flags = hi->hi_flags; 206 if (def) 207 h->h_flags |= H_DEFAULT; 208 if (cond) 209 h->h_flags |= H_CHECK; 210 211 /* hack to see if this is a new format message */ 212 if (!def && !headeronly && bitset(H_RCPT|H_FROM, h->h_flags) && 213 (strchr(fvalue, ',') != NULL || strchr(fvalue, '(') != NULL || 214 strchr(fvalue, '<') != NULL || strchr(fvalue, ';') != NULL)) 215 { 216 e->e_flags &= ~EF_OLDSTYLE; 217 } 218 219 return (h->h_flags); 220 } 221 /* 222 ** ADDHEADER -- add a header entry to the end of the queue. 223 ** 224 ** This bypasses the special checking of chompheader. 225 ** 226 ** Parameters: 227 ** field -- the name of the header field. 228 ** value -- the value of the field. 229 ** hp -- an indirect pointer to the header structure list. 230 ** 231 ** Returns: 232 ** none. 233 ** 234 ** Side Effects: 235 ** adds the field on the list of headers for this envelope. 236 */ 237 238 addheader(field, value, hdrlist) 239 char *field; 240 char *value; 241 HDR **hdrlist; 242 { 243 register HDR *h; 244 register struct hdrinfo *hi; 245 HDR **hp; 246 247 /* find info struct */ 248 for (hi = HdrInfo; hi->hi_field != NULL; hi++) 249 { 250 if (strcasecmp(field, hi->hi_field) == 0) 251 break; 252 } 253 254 /* find current place in list -- keep back pointer? */ 255 for (hp = hdrlist; (h = *hp) != NULL; hp = &h->h_link) 256 { 257 if (strcasecmp(field, h->h_field) == 0) 258 break; 259 } 260 261 /* allocate space for new header */ 262 h = (HDR *) xalloc(sizeof *h); 263 h->h_field = field; 264 h->h_value = newstr(value); 265 h->h_link = *hp; 266 h->h_flags = hi->hi_flags | H_DEFAULT; 267 clrbitmap(h->h_mflags); 268 *hp = h; 269 } 270 /* 271 ** HVALUE -- return value of a header. 272 ** 273 ** Only "real" fields (i.e., ones that have not been supplied 274 ** as a default) are used. 275 ** 276 ** Parameters: 277 ** field -- the field name. 278 ** header -- the header list. 279 ** 280 ** Returns: 281 ** pointer to the value part. 282 ** NULL if not found. 283 ** 284 ** Side Effects: 285 ** none. 286 */ 287 288 char * 289 hvalue(field, header) 290 char *field; 291 HDR *header; 292 { 293 register HDR *h; 294 295 for (h = header; h != NULL; h = h->h_link) 296 { 297 if (!bitset(H_DEFAULT, h->h_flags) && 298 strcasecmp(h->h_field, field) == 0) 299 return (h->h_value); 300 } 301 return (NULL); 302 } 303 /* 304 ** ISHEADER -- predicate telling if argument is a header. 305 ** 306 ** A line is a header if it has a single word followed by 307 ** optional white space followed by a colon. 308 ** 309 ** Header fields beginning with two dashes, although technically 310 ** permitted by RFC822, are automatically rejected in order 311 ** to make MIME work out. Without this we could have a technically 312 ** legal header such as ``--"foo:bar"'' that would also be a legal 313 ** MIME separator. 314 ** 315 ** Parameters: 316 ** h -- string to check for possible headerness. 317 ** 318 ** Returns: 319 ** TRUE if h is a header. 320 ** FALSE otherwise. 321 ** 322 ** Side Effects: 323 ** none. 324 */ 325 326 bool 327 isheader(h) 328 char *h; 329 { 330 register char *s = h; 331 332 if (s[0] == '-' && s[1] == '-') 333 return FALSE; 334 335 while (*s > ' ' && *s != ':' && *s != '\0') 336 s++; 337 338 if (h == s) 339 return FALSE; 340 341 /* following technically violates RFC822 */ 342 while (isascii(*s) && isspace(*s)) 343 s++; 344 345 return (*s == ':'); 346 } 347 /* 348 ** EATHEADER -- run through the stored header and extract info. 349 ** 350 ** Parameters: 351 ** e -- the envelope to process. 352 ** full -- if set, do full processing (e.g., compute 353 ** message priority). 354 ** 355 ** Returns: 356 ** none. 357 ** 358 ** Side Effects: 359 ** Sets a bunch of global variables from information 360 ** in the collected header. 361 ** Aborts the message if the hop count is exceeded. 362 */ 363 364 eatheader(e, full) 365 register ENVELOPE *e; 366 bool full; 367 { 368 register HDR *h; 369 register char *p; 370 int hopcnt = 0; 371 char *msgid; 372 char buf[MAXLINE]; 373 374 /* 375 ** Set up macros for possible expansion in headers. 376 */ 377 378 define('f', e->e_sender, e); 379 define('g', e->e_sender, e); 380 if (e->e_origrcpt != NULL && *e->e_origrcpt != '\0') 381 define('u', e->e_origrcpt, e); 382 else 383 define('u', NULL, e); 384 385 /* full name of from person */ 386 p = hvalue("full-name", e->e_header); 387 if (p != NULL) 388 define('x', p, e); 389 390 if (tTd(32, 1)) 391 printf("----- collected header -----\n"); 392 msgid = "<none>"; 393 for (h = e->e_header; h != NULL; h = h->h_link) 394 { 395 if (h->h_value == NULL) 396 { 397 if (tTd(32, 1)) 398 printf("%s: <NULL>\n", h->h_field); 399 continue; 400 } 401 402 /* do early binding */ 403 if (bitset(H_DEFAULT, h->h_flags)) 404 { 405 expand(h->h_value, buf, sizeof buf, e); 406 if (buf[0] != '\0') 407 { 408 h->h_value = newstr(buf); 409 h->h_flags &= ~H_DEFAULT; 410 } 411 } 412 413 if (tTd(32, 1)) 414 { 415 printf("%s: ", h->h_field); 416 xputs(h->h_value); 417 printf("\n"); 418 } 419 420 /* count the number of times it has been processed */ 421 if (bitset(H_TRACE, h->h_flags)) 422 hopcnt++; 423 424 /* send to this person if we so desire */ 425 if (GrabTo && bitset(H_RCPT, h->h_flags) && 426 !bitset(H_DEFAULT, h->h_flags) && 427 (!bitset(EF_RESENT, e->e_flags) || bitset(H_RESENT, h->h_flags))) 428 { 429 int saveflags = e->e_flags; 430 431 (void) sendtolist(h->h_value, NULLADDR, 432 &e->e_sendqueue, 0, e); 433 434 /* delete fatal errors generated by this address */ 435 if (!GrabTo && !bitset(EF_FATALERRS, saveflags)) 436 e->e_flags &= ~EF_FATALERRS; 437 } 438 439 /* save the message-id for logging */ 440 if (full && strcasecmp(h->h_field, "message-id") == 0) 441 { 442 msgid = h->h_value; 443 while (isascii(*msgid) && isspace(*msgid)) 444 msgid++; 445 } 446 447 /* see if this is a return-receipt header */ 448 if (bitset(H_RECEIPTTO, h->h_flags)) 449 e->e_receiptto = h->h_value; 450 } 451 if (tTd(32, 1)) 452 printf("----------------------------\n"); 453 454 /* if we are just verifying (that is, sendmail -t -bv), drop out now */ 455 if (OpMode == MD_VERIFY) 456 return; 457 458 /* store hop count */ 459 if (hopcnt > e->e_hopcount) 460 e->e_hopcount = hopcnt; 461 462 /* message priority */ 463 p = hvalue("precedence", e->e_header); 464 if (p != NULL) 465 e->e_class = priencode(p); 466 if (full) 467 { 468 e->e_msgpriority = e->e_msgsize 469 - e->e_class * WkClassFact 470 + e->e_nrcpts * WkRecipFact; 471 if (e->e_class < 0) 472 e->e_timeoutclass = TOC_NONURGENT; 473 else if (e->e_class > 0) 474 e->e_timeoutclass = TOC_URGENT; 475 } 476 477 /* message timeout priority */ 478 p = hvalue("priority", e->e_header); 479 if (full && p != NULL) 480 { 481 /* (this should be in the configuration file) */ 482 if (strcasecmp(p, "urgent")) 483 e->e_timeoutclass = TOC_URGENT; 484 else if (strcasecmp(p, "normal")) 485 e->e_timeoutclass = TOC_NORMAL; 486 else if (strcasecmp(p, "non-urgent")) 487 e->e_timeoutclass = TOC_NONURGENT; 488 } 489 490 /* date message originated */ 491 p = hvalue("posted-date", e->e_header); 492 if (p == NULL) 493 p = hvalue("date", e->e_header); 494 if (p != NULL) 495 define('a', p, e); 496 497 /* 498 ** From person in antiquated ARPANET mode 499 ** required by UK Grey Book e-mail gateways (sigh) 500 */ 501 502 if (OpMode == MD_ARPAFTP) 503 { 504 register struct hdrinfo *hi; 505 506 for (hi = HdrInfo; hi->hi_field != NULL; hi++) 507 { 508 if (bitset(H_FROM, hi->hi_flags) && 509 (!bitset(H_RESENT, hi->hi_flags) || 510 bitset(EF_RESENT, e->e_flags)) && 511 (p = hvalue(hi->hi_field, e->e_header)) != NULL) 512 break; 513 } 514 if (hi->hi_field != NULL) 515 { 516 if (tTd(32, 2)) 517 printf("eatheader: setsender(*%s == %s)\n", 518 hi->hi_field, p); 519 setsender(p, e, NULL, TRUE); 520 } 521 } 522 523 /* 524 ** Log collection information. 525 */ 526 527 # ifdef LOG 528 if (bitset(EF_LOGSENDER, e->e_flags) && LogLevel > 4) 529 logsender(e, msgid); 530 # endif /* LOG */ 531 e->e_flags &= ~EF_LOGSENDER; 532 } 533 /* 534 ** LOGSENDER -- log sender information 535 ** 536 ** Parameters: 537 ** e -- the envelope to log 538 ** msgid -- the message id 539 ** 540 ** Returns: 541 ** none 542 */ 543 544 logsender(e, msgid) 545 register ENVELOPE *e; 546 char *msgid; 547 { 548 # ifdef LOG 549 char *name; 550 register char *sbp; 551 register char *p; 552 int l; 553 char hbuf[MAXNAME + 1]; 554 char sbuf[MAXLINE + 1]; 555 char mbuf[MAXNAME + 1]; 556 557 /* don't allow newlines in the message-id */ 558 if (msgid != NULL) 559 { 560 l = strlen(msgid); 561 if (l > sizeof mbuf - 1) 562 l = sizeof mbuf - 1; 563 bcopy(msgid, mbuf, l); 564 mbuf[l] = '\0'; 565 p = mbuf; 566 while ((p = strchr(p, '\n')) != NULL) 567 *p++ = ' '; 568 } 569 570 if (bitset(EF_RESPONSE, e->e_flags)) 571 name = "[RESPONSE]"; 572 else if ((name = macvalue('_', e)) != NULL) 573 ; 574 else if (RealHostName == NULL) 575 name = "localhost"; 576 else if (RealHostName[0] == '[') 577 name = RealHostName; 578 else 579 { 580 name = hbuf; 581 (void) sprintf(hbuf, "%.80s", RealHostName); 582 if (RealHostAddr.sa.sa_family != 0) 583 { 584 p = &hbuf[strlen(hbuf)]; 585 (void) sprintf(p, " (%s)", 586 anynet_ntoa(&RealHostAddr)); 587 } 588 } 589 590 /* some versions of syslog only take 5 printf args */ 591 # if (SYSLOG_BUFSIZE) >= 256 592 sbp = sbuf; 593 sprintf(sbp, "from=%.200s, size=%ld, class=%d, pri=%ld, nrcpts=%d", 594 e->e_from.q_paddr == NULL ? "<NONE>" : e->e_from.q_paddr, 595 e->e_msgsize, e->e_class, e->e_msgpriority, e->e_nrcpts); 596 sbp += strlen(sbp); 597 if (msgid != NULL) 598 { 599 sprintf(sbp, ", msgid=%.100s", mbuf); 600 sbp += strlen(sbp); 601 } 602 if (e->e_bodytype != NULL) 603 { 604 (void) sprintf(sbp, ", bodytype=%.20s", e->e_bodytype); 605 sbp += strlen(sbp); 606 } 607 p = macvalue('r', e); 608 if (p != NULL) 609 (void) sprintf(sbp, ", proto=%.20s", p); 610 syslog(LOG_INFO, "%s: %s, relay=%s", 611 e->e_id, sbuf, name); 612 613 # else /* short syslog buffer */ 614 615 syslog(LOG_INFO, "%s: from=%s", 616 e->e_id, e->e_from.q_paddr == NULL ? "<NONE>" : 617 shortenstring(e->e_from.q_paddr, 83)); 618 syslog(LOG_INFO, "%s: size=%ld, class=%ld, pri=%ld, nrcpts=%d", 619 e->e_id, e->e_msgsize, e->e_class, 620 e->e_msgpriority, e->e_nrcpts); 621 if (msgid != NULL) 622 syslog(LOG_INFO, "%s: msgid=%s", e->e_id, mbuf); 623 sbp = sbuf; 624 sprintf(sbp, "%s:", e->e_id); 625 sbp += strlen(sbp); 626 if (e->e_bodytype != NULL) 627 { 628 sprintf(sbp, " bodytype=%s,", e->e_bodytype); 629 sbp += strlen(sbp); 630 } 631 p = macvalue('r', e); 632 if (p != NULL) 633 { 634 sprintf(sbp, " proto=%s,", p); 635 sbp += strlen(sbp); 636 } 637 syslog(LOG_INFO, "%s relay=%s", sbuf, name); 638 # endif 639 # endif 640 } 641 /* 642 ** PRIENCODE -- encode external priority names into internal values. 643 ** 644 ** Parameters: 645 ** p -- priority in ascii. 646 ** 647 ** Returns: 648 ** priority as a numeric level. 649 ** 650 ** Side Effects: 651 ** none. 652 */ 653 654 priencode(p) 655 char *p; 656 { 657 register int i; 658 659 for (i = 0; i < NumPriorities; i++) 660 { 661 if (!strcasecmp(p, Priorities[i].pri_name)) 662 return (Priorities[i].pri_val); 663 } 664 665 /* unknown priority */ 666 return (0); 667 } 668 /* 669 ** CRACKADDR -- parse an address and turn it into a macro 670 ** 671 ** This doesn't actually parse the address -- it just extracts 672 ** it and replaces it with "$g". The parse is totally ad hoc 673 ** and isn't even guaranteed to leave something syntactically 674 ** identical to what it started with. However, it does leave 675 ** something semantically identical. 676 ** 677 ** This algorithm has been cleaned up to handle a wider range 678 ** of cases -- notably quoted and backslash escaped strings. 679 ** This modification makes it substantially better at preserving 680 ** the original syntax. 681 ** 682 ** Parameters: 683 ** addr -- the address to be cracked. 684 ** 685 ** Returns: 686 ** a pointer to the new version. 687 ** 688 ** Side Effects: 689 ** none. 690 ** 691 ** Warning: 692 ** The return value is saved in local storage and should 693 ** be copied if it is to be reused. 694 */ 695 696 char * 697 crackaddr(addr) 698 register char *addr; 699 { 700 register char *p; 701 register char c; 702 int cmtlev; 703 int realcmtlev; 704 int anglelev, realanglelev; 705 int copylev; 706 bool qmode; 707 bool realqmode; 708 bool skipping; 709 bool putgmac = FALSE; 710 bool quoteit = FALSE; 711 bool gotangle = FALSE; 712 bool gotcolon = FALSE; 713 register char *bp; 714 char *buflim; 715 char *bufhead; 716 char *addrhead; 717 static char buf[MAXNAME + 1]; 718 719 if (tTd(33, 1)) 720 printf("crackaddr(%s)\n", addr); 721 722 /* strip leading spaces */ 723 while (*addr != '\0' && isascii(*addr) && isspace(*addr)) 724 addr++; 725 726 /* 727 ** Start by assuming we have no angle brackets. This will be 728 ** adjusted later if we find them. 729 */ 730 731 bp = bufhead = buf; 732 buflim = &buf[sizeof buf - 5]; 733 p = addrhead = addr; 734 copylev = anglelev = realanglelev = cmtlev = realcmtlev = 0; 735 qmode = realqmode = FALSE; 736 737 while ((c = *p++) != '\0') 738 { 739 /* 740 ** If the buffer is overful, go into a special "skipping" 741 ** mode that tries to keep legal syntax but doesn't actually 742 ** output things. 743 */ 744 745 skipping = bp >= buflim; 746 747 if (copylev > 0 && !skipping) 748 *bp++ = c; 749 750 /* check for backslash escapes */ 751 if (c == '\\') 752 { 753 /* arrange to quote the address */ 754 if (cmtlev <= 0 && !qmode) 755 quoteit = TRUE; 756 757 if ((c = *p++) == '\0') 758 { 759 /* too far */ 760 p--; 761 goto putg; 762 } 763 if (copylev > 0 && !skipping) 764 *bp++ = c; 765 goto putg; 766 } 767 768 /* check for quoted strings */ 769 if (c == '"' && cmtlev <= 0) 770 { 771 qmode = !qmode; 772 if (copylev > 0 && !skipping) 773 realqmode = !realqmode; 774 continue; 775 } 776 if (qmode) 777 goto putg; 778 779 /* check for comments */ 780 if (c == '(') 781 { 782 cmtlev++; 783 784 /* allow space for closing paren */ 785 if (!skipping) 786 { 787 buflim--; 788 realcmtlev++; 789 if (copylev++ <= 0) 790 { 791 *bp++ = ' '; 792 *bp++ = c; 793 } 794 } 795 } 796 if (cmtlev > 0) 797 { 798 if (c == ')') 799 { 800 cmtlev--; 801 copylev--; 802 if (!skipping) 803 { 804 realcmtlev--; 805 buflim++; 806 } 807 } 808 continue; 809 } 810 else if (c == ')') 811 { 812 /* syntax error: unmatched ) */ 813 if (copylev > 0 && !skipping) 814 bp--; 815 } 816 817 /* check for group: list; syntax */ 818 if (c == ':' && anglelev <= 0 && !gotcolon && *p != ':' && 819 !ColonOkInAddr) 820 { 821 register char *q; 822 823 gotcolon = TRUE; 824 825 /* consider white space part of the group: part */ 826 while (isascii(*p) && isspace(*p)) 827 p++; 828 bp = bufhead; 829 for (q = addrhead; q < p; ) 830 { 831 c = *q++; 832 if (bp < buflim) 833 { 834 *bp++ = c; 835 } 836 } 837 copylev = 0; 838 putgmac = FALSE; 839 bufhead = bp; 840 addrhead = p; 841 continue; 842 } 843 844 if (c == ';' && copylev <= 0 && !ColonOkInAddr) 845 { 846 register char *q = p; 847 848 if (bp < buflim) 849 *bp++ = c; 850 } 851 852 /* check for characters that may have to be quoted */ 853 if (strchr(".'@,;:\\()[]", c) != NULL) 854 { 855 /* 856 ** If these occur as the phrase part of a <> 857 ** construct, but are not inside of () or already 858 ** quoted, they will have to be quoted. Note that 859 ** now (but don't actually do the quoting). 860 */ 861 862 if (cmtlev <= 0 && !qmode) 863 quoteit = TRUE; 864 } 865 866 /* check for angle brackets */ 867 if (c == '<') 868 { 869 register char *q; 870 871 /* assume first of two angles is bogus */ 872 if (gotangle) 873 quoteit = TRUE; 874 gotangle = TRUE; 875 876 /* oops -- have to change our mind */ 877 anglelev = 1; 878 if (!skipping) 879 realanglelev = 1; 880 881 bp = bufhead; 882 if (quoteit) 883 { 884 *bp++ = '"'; 885 886 /* back up over the '<' and any spaces */ 887 --p; 888 while (isascii(*--p) && isspace(*p)) 889 continue; 890 p++; 891 } 892 for (q = addrhead; q < p; ) 893 { 894 c = *q++; 895 if (bp < buflim) 896 { 897 if (quoteit && c == '"') 898 *bp++ = '\\'; 899 *bp++ = c; 900 } 901 } 902 if (quoteit) 903 { 904 if (bp == &buf[1]) 905 bp--; 906 else 907 *bp++ = '"'; 908 while ((c = *p++) != '<') 909 { 910 if (bp < buflim) 911 *bp++ = c; 912 } 913 *bp++ = c; 914 } 915 copylev = 0; 916 putgmac = quoteit = FALSE; 917 continue; 918 } 919 920 if (c == '>') 921 { 922 if (anglelev > 0) 923 { 924 anglelev--; 925 if (!skipping) 926 { 927 realanglelev--; 928 buflim++; 929 } 930 } 931 else if (!skipping) 932 { 933 /* syntax error: unmatched > */ 934 if (copylev > 0) 935 bp--; 936 quoteit = TRUE; 937 continue; 938 } 939 if (copylev++ <= 0) 940 *bp++ = c; 941 continue; 942 } 943 944 /* must be a real address character */ 945 putg: 946 if (copylev <= 0 && !putgmac) 947 { 948 *bp++ = MACROEXPAND; 949 *bp++ = 'g'; 950 putgmac = TRUE; 951 } 952 } 953 954 /* repair any syntactic damage */ 955 if (realqmode) 956 *bp++ = '"'; 957 while (realcmtlev-- > 0) 958 *bp++ = ')'; 959 while (realanglelev-- > 0) 960 *bp++ = '>'; 961 *bp++ = '\0'; 962 963 if (tTd(33, 1)) 964 printf("crackaddr=>`%s'\n", buf); 965 966 return (buf); 967 } 968 /* 969 ** PUTHEADER -- put the header part of a message from the in-core copy 970 ** 971 ** Parameters: 972 ** mci -- the connection information. 973 ** h -- the header to put. 974 ** e -- envelope to use. 975 ** 976 ** Returns: 977 ** none. 978 ** 979 ** Side Effects: 980 ** none. 981 */ 982 983 /* 984 * Macro for fast max (not available in e.g. DG/UX, 386/ix). 985 */ 986 #ifndef MAX 987 # define MAX(a,b) (((a)>(b))?(a):(b)) 988 #endif 989 990 putheader(mci, h, e) 991 register MCI *mci; 992 register HDR *h; 993 register ENVELOPE *e; 994 { 995 char buf[MAX(MAXLINE,BUFSIZ)]; 996 char obuf[MAXLINE]; 997 998 if (tTd(34, 1)) 999 printf("--- putheader, mailer = %s ---\n", 1000 mci->mci_mailer->m_name); 1001 1002 mci->mci_flags |= MCIF_INHEADER; 1003 for (; h != NULL; h = h->h_link) 1004 { 1005 register char *p; 1006 extern bool bitintersect(); 1007 1008 if (tTd(34, 11)) 1009 { 1010 printf(" %s: ", h->h_field); 1011 xputs(h->h_value); 1012 } 1013 1014 if (bitset(H_CHECK|H_ACHECK, h->h_flags) && 1015 !bitintersect(h->h_mflags, mci->mci_mailer->m_flags)) 1016 { 1017 if (tTd(34, 11)) 1018 printf(" (skipped)\n"); 1019 continue; 1020 } 1021 1022 /* handle Resent-... headers specially */ 1023 if (bitset(H_RESENT, h->h_flags) && !bitset(EF_RESENT, e->e_flags)) 1024 { 1025 if (tTd(34, 11)) 1026 printf(" (skipped (resent))\n"); 1027 continue; 1028 } 1029 1030 /* suppress return receipts if requested */ 1031 if (bitset(H_RECEIPTTO, h->h_flags) && 1032 bitset(EF_NORECEIPT, e->e_flags)) 1033 { 1034 if (tTd(34, 11)) 1035 printf(" (skipped (receipt))\n"); 1036 continue; 1037 } 1038 1039 /* suppress Content-Transfer-Encoding: if we are MIMEing */ 1040 if (bitset(H_CTE, h->h_flags) && 1041 bitset(MCIF_CVT8TO7, mci->mci_flags)) 1042 { 1043 if (tTd(34, 11)) 1044 printf(" (skipped (content-transfer-encoding))\n"); 1045 continue; 1046 } 1047 1048 /* macro expand value if generated internally */ 1049 p = h->h_value; 1050 if (bitset(H_DEFAULT, h->h_flags)) 1051 { 1052 expand(p, buf, sizeof buf, e); 1053 p = buf; 1054 if (p == NULL || *p == '\0') 1055 { 1056 if (tTd(34, 11)) 1057 printf(" (skipped -- null value)\n"); 1058 continue; 1059 } 1060 } 1061 1062 if (tTd(34, 11)) 1063 printf("\n"); 1064 1065 if (bitset(H_STRIPVAL, h->h_flags)) 1066 { 1067 /* empty field */ 1068 (void) sprintf(obuf, "%s:", h->h_field); 1069 putline(obuf, mci); 1070 } 1071 else if (bitset(H_FROM|H_RCPT, h->h_flags)) 1072 { 1073 /* address field */ 1074 bool oldstyle = bitset(EF_OLDSTYLE, e->e_flags); 1075 1076 if (bitset(H_FROM, h->h_flags)) 1077 oldstyle = FALSE; 1078 commaize(h, p, oldstyle, mci, e); 1079 } 1080 else 1081 { 1082 /* vanilla header line */ 1083 register char *nlp; 1084 1085 (void) sprintf(obuf, "%s: ", h->h_field); 1086 while ((nlp = strchr(p, '\n')) != NULL) 1087 { 1088 *nlp = '\0'; 1089 (void) strcat(obuf, p); 1090 *nlp = '\n'; 1091 putline(obuf, mci); 1092 p = ++nlp; 1093 obuf[0] = '\0'; 1094 } 1095 (void) strcat(obuf, p); 1096 putline(obuf, mci); 1097 } 1098 } 1099 1100 /* 1101 ** If we are converting this to a MIME message, add the 1102 ** MIME headers. 1103 */ 1104 1105 if (bitset(MM_MIME8BIT, MimeMode) && 1106 bitset(EF_HAS8BIT, e->e_flags) && 1107 !bitnset(M_8BITS, mci->mci_mailer->m_flags) && 1108 !bitset(MCIF_CVT8TO7, mci->mci_flags)) 1109 { 1110 if (hvalue("MIME-Version", e->e_header) == NULL) 1111 putline("MIME-Version: 1.0", mci); 1112 if (hvalue("Content-Type", e->e_header) == NULL) 1113 { 1114 sprintf(obuf, "Content-Type: text/plain; charset=%s", 1115 defcharset(e)); 1116 putline(obuf, mci); 1117 } 1118 if (hvalue("Content-Transfer-Encoding", e->e_header) == NULL) 1119 putline("Content-Transfer-Encoding: 8bit", mci); 1120 } 1121 } 1122 /* 1123 ** COMMAIZE -- output a header field, making a comma-translated list. 1124 ** 1125 ** Parameters: 1126 ** h -- the header field to output. 1127 ** p -- the value to put in it. 1128 ** oldstyle -- TRUE if this is an old style header. 1129 ** mci -- the connection information. 1130 ** e -- the envelope containing the message. 1131 ** 1132 ** Returns: 1133 ** none. 1134 ** 1135 ** Side Effects: 1136 ** outputs "p" to file "fp". 1137 */ 1138 1139 void 1140 commaize(h, p, oldstyle, mci, e) 1141 register HDR *h; 1142 register char *p; 1143 bool oldstyle; 1144 register MCI *mci; 1145 register ENVELOPE *e; 1146 { 1147 register char *obp; 1148 int opos; 1149 int omax; 1150 bool firstone = TRUE; 1151 char obuf[MAXLINE + 3]; 1152 1153 /* 1154 ** Output the address list translated by the 1155 ** mailer and with commas. 1156 */ 1157 1158 if (tTd(14, 2)) 1159 printf("commaize(%s: %s)\n", h->h_field, p); 1160 1161 obp = obuf; 1162 (void) sprintf(obp, "%s: ", h->h_field); 1163 opos = strlen(h->h_field) + 2; 1164 obp += opos; 1165 omax = mci->mci_mailer->m_linelimit - 2; 1166 if (omax < 0 || omax > 78) 1167 omax = 78; 1168 1169 /* 1170 ** Run through the list of values. 1171 */ 1172 1173 while (*p != '\0') 1174 { 1175 register char *name; 1176 register int c; 1177 char savechar; 1178 int flags; 1179 auto int stat; 1180 1181 /* 1182 ** Find the end of the name. New style names 1183 ** end with a comma, old style names end with 1184 ** a space character. However, spaces do not 1185 ** necessarily delimit an old-style name -- at 1186 ** signs mean keep going. 1187 */ 1188 1189 /* find end of name */ 1190 while ((isascii(*p) && isspace(*p)) || *p == ',') 1191 p++; 1192 name = p; 1193 for (;;) 1194 { 1195 auto char *oldp; 1196 char pvpbuf[PSBUFSIZE]; 1197 1198 (void) prescan(p, oldstyle ? ' ' : ',', pvpbuf, 1199 sizeof pvpbuf, &oldp, NULL); 1200 p = oldp; 1201 1202 /* look to see if we have an at sign */ 1203 while (*p != '\0' && isascii(*p) && isspace(*p)) 1204 p++; 1205 1206 if (*p != '@') 1207 { 1208 p = oldp; 1209 break; 1210 } 1211 p += *p == '@' ? 1 : 2; 1212 while (*p != '\0' && isascii(*p) && isspace(*p)) 1213 p++; 1214 } 1215 /* at the end of one complete name */ 1216 1217 /* strip off trailing white space */ 1218 while (p >= name && 1219 ((isascii(*p) && isspace(*p)) || *p == ',' || *p == '\0')) 1220 p--; 1221 if (++p == name) 1222 continue; 1223 savechar = *p; 1224 *p = '\0'; 1225 1226 /* translate the name to be relative */ 1227 flags = RF_HEADERADDR|RF_ADDDOMAIN; 1228 if (bitset(H_FROM, h->h_flags)) 1229 flags |= RF_SENDERADDR; 1230 #ifdef USERDB 1231 else if (e->e_from.q_mailer != NULL && 1232 bitnset(M_UDBRECIPIENT, e->e_from.q_mailer->m_flags)) 1233 { 1234 extern char *udbsender(); 1235 1236 name = udbsender(name); 1237 } 1238 #endif 1239 stat = EX_OK; 1240 name = remotename(name, mci->mci_mailer, flags, &stat, e); 1241 if (*name == '\0') 1242 { 1243 *p = savechar; 1244 continue; 1245 } 1246 1247 /* output the name with nice formatting */ 1248 opos += strlen(name); 1249 if (!firstone) 1250 opos += 2; 1251 if (opos > omax && !firstone) 1252 { 1253 (void) strcpy(obp, ",\n"); 1254 putline(obuf, mci); 1255 obp = obuf; 1256 (void) strcpy(obp, " "); 1257 opos = strlen(obp); 1258 obp += opos; 1259 opos += strlen(name); 1260 } 1261 else if (!firstone) 1262 { 1263 (void) strcpy(obp, ", "); 1264 obp += 2; 1265 } 1266 1267 while ((c = *name++) != '\0' && obp < &obuf[MAXLINE]) 1268 *obp++ = c; 1269 firstone = FALSE; 1270 *p = savechar; 1271 } 1272 (void) strcpy(obp, "\n"); 1273 putline(obuf, mci); 1274 } 1275 /* 1276 ** COPYHEADER -- copy header list 1277 ** 1278 ** This routine is the equivalent of newstr for header lists 1279 ** 1280 ** Parameters: 1281 ** header -- list of header structures to copy. 1282 ** 1283 ** Returns: 1284 ** a copy of 'header'. 1285 ** 1286 ** Side Effects: 1287 ** none. 1288 */ 1289 1290 HDR * 1291 copyheader(header) 1292 register HDR *header; 1293 { 1294 register HDR *newhdr; 1295 HDR *ret; 1296 register HDR **tail = &ret; 1297 1298 while (header != NULL) 1299 { 1300 newhdr = (HDR *) xalloc(sizeof(HDR)); 1301 STRUCTCOPY(*header, *newhdr); 1302 *tail = newhdr; 1303 tail = &newhdr->h_link; 1304 header = header->h_link; 1305 } 1306 *tail = NULL; 1307 1308 return ret; 1309 } 1310