1 /* 2 * Copyright (c) 1983, 1995 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 8.67 (Berkeley) 05/28/95"; 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 int 36 chompheader(line, def, hdrp, e) 37 char *line; 38 bool def; 39 HDR **hdrp; 40 register ENVELOPE *e; 41 { 42 register char *p; 43 register HDR *h; 44 HDR **hp; 45 char *fname; 46 char *fvalue; 47 struct hdrinfo *hi; 48 bool cond = FALSE; 49 bool headeronly; 50 BITMAP mopts; 51 char buf[MAXNAME + 1]; 52 53 if (tTd(31, 6)) 54 { 55 printf("chompheader: "); 56 xputs(line); 57 printf("\n"); 58 } 59 60 headeronly = hdrp != NULL; 61 if (!headeronly) 62 hdrp = &e->e_header; 63 64 /* strip off options */ 65 clrbitmap(mopts); 66 p = line; 67 if (*p == '?') 68 { 69 /* have some */ 70 register char *q = strchr(p + 1, *p); 71 72 if (q != NULL) 73 { 74 *q++ = '\0'; 75 while (*++p != '\0') 76 setbitn(*p, mopts); 77 p = q; 78 } 79 else 80 syserr("553 header syntax error, line \"%s\"", line); 81 cond = TRUE; 82 } 83 84 /* find canonical name */ 85 fname = p; 86 while (isascii(*p) && isgraph(*p) && *p != ':') 87 p++; 88 fvalue = p; 89 while (isascii(*p) && isspace(*p)) 90 p++; 91 if (*p++ != ':' || fname == fvalue) 92 { 93 syserr("553 header syntax error, line \"%s\"", line); 94 return (0); 95 } 96 *fvalue = '\0'; 97 fvalue = p; 98 99 /* strip field value on front */ 100 if (*fvalue == ' ') 101 fvalue++; 102 103 /* see if it is a known type */ 104 for (hi = HdrInfo; hi->hi_field != NULL; hi++) 105 { 106 if (strcasecmp(hi->hi_field, fname) == 0) 107 break; 108 } 109 110 if (tTd(31, 9)) 111 { 112 if (hi->hi_field == NULL) 113 printf("no header match\n"); 114 else 115 printf("header match, hi_flags=%x\n", hi->hi_flags); 116 } 117 118 /* see if this is a resent message */ 119 if (!def && !headeronly && bitset(H_RESENT, hi->hi_flags)) 120 e->e_flags |= EF_RESENT; 121 122 /* if this is an Errors-To: header keep track of it now */ 123 if (UseErrorsTo && !def && !headeronly && 124 bitset(H_ERRORSTO, hi->hi_flags)) 125 (void) sendtolist(fvalue, NULLADDR, &e->e_errorqueue, 0, e); 126 127 /* if this means "end of header" quit now */ 128 if (bitset(H_EOH, hi->hi_flags)) 129 return (hi->hi_flags); 130 131 /* 132 ** Drop explicit From: if same as what we would generate. 133 ** This is to make MH (which doesn't always give a full name) 134 ** insert the full name information in all circumstances. 135 */ 136 137 p = "resent-from"; 138 if (!bitset(EF_RESENT, e->e_flags)) 139 p += 7; 140 if (!def && !headeronly && !bitset(EF_QUEUERUN, e->e_flags) && 141 strcasecmp(fname, p) == 0) 142 { 143 if (tTd(31, 2)) 144 { 145 printf("comparing header from (%s) against default (%s or %s)\n", 146 fvalue, e->e_from.q_paddr, e->e_from.q_user); 147 } 148 if (e->e_from.q_paddr != NULL && 149 (strcmp(fvalue, e->e_from.q_paddr) == 0 || 150 strcmp(fvalue, e->e_from.q_user) == 0)) 151 return (hi->hi_flags); 152 #ifdef MAYBENEXTRELEASE /* XXX UNTESTED XXX UNTESTED XXX UNTESTED XXX */ 153 #if USERDB 154 else 155 { 156 auto ADDRESS a; 157 char *fancy; 158 bool oldSuprErrs = SuprErrs; 159 extern char *crackaddr(); 160 extern char *udbsender(); 161 162 /* 163 ** Try doing USERDB rewriting even on fully commented 164 ** names; this saves the "comment" information (such 165 ** as full name) and rewrites the electronic part. 166 ** 167 ** XXX This code doesn't belong here -- parsing should 168 ** XXX not be done during collect() phase because 169 ** XXX error messages can confuse the SMTP phase. 170 ** XXX Setting SuprErrs is a crude hack around this 171 ** XXX problem. 172 */ 173 174 if (OpMode == MD_SMTP || OpMode == MD_ARPAFTP) 175 SuprErrs = TRUE; 176 fancy = crackaddr(fvalue); 177 if (parseaddr(fvalue, &a, RF_COPYNONE, '\0', NULL, e) != NULL && 178 bitnset(M_CHECKUDB, a.q_mailer->m_flags) && 179 (p = udbsender(a.q_user)) != NULL) 180 { 181 char *oldg = macvalue('g', e); 182 183 define('g', p, e); 184 expand(fancy, buf, sizeof buf, e); 185 define('g', oldg, e); 186 fvalue = buf; 187 } 188 SuprErrs = oldSuprErrs; 189 } 190 #endif 191 #endif 192 } 193 194 /* delete default value for this header */ 195 for (hp = hdrp; (h = *hp) != NULL; hp = &h->h_link) 196 { 197 if (strcasecmp(fname, h->h_field) == 0 && 198 bitset(H_DEFAULT, h->h_flags) && 199 !bitset(H_FORCE, h->h_flags)) 200 { 201 h->h_value = NULL; 202 if (!cond) 203 { 204 /* copy conditions from default case */ 205 bcopy((char *)h->h_mflags, (char *)mopts, 206 sizeof mopts); 207 } 208 } 209 } 210 211 /* create a new node */ 212 h = (HDR *) xalloc(sizeof *h); 213 h->h_field = newstr(fname); 214 h->h_value = newstr(fvalue); 215 h->h_link = NULL; 216 bcopy((char *) mopts, (char *) h->h_mflags, sizeof mopts); 217 *hp = h; 218 h->h_flags = hi->hi_flags; 219 if (def) 220 h->h_flags |= H_DEFAULT; 221 if (cond) 222 h->h_flags |= H_CHECK; 223 224 /* hack to see if this is a new format message */ 225 if (!def && !headeronly && bitset(H_RCPT|H_FROM, h->h_flags) && 226 (strchr(fvalue, ',') != NULL || strchr(fvalue, '(') != NULL || 227 strchr(fvalue, '<') != NULL || strchr(fvalue, ';') != NULL)) 228 { 229 e->e_flags &= ~EF_OLDSTYLE; 230 } 231 232 return (h->h_flags); 233 } 234 /* 235 ** ADDHEADER -- add a header entry to the end of the queue. 236 ** 237 ** This bypasses the special checking of chompheader. 238 ** 239 ** Parameters: 240 ** field -- the name of the header field. 241 ** value -- the value of the field. 242 ** hp -- an indirect pointer to the header structure list. 243 ** 244 ** Returns: 245 ** none. 246 ** 247 ** Side Effects: 248 ** adds the field on the list of headers for this envelope. 249 */ 250 251 void 252 addheader(field, value, hdrlist) 253 char *field; 254 char *value; 255 HDR **hdrlist; 256 { 257 register HDR *h; 258 register struct hdrinfo *hi; 259 HDR **hp; 260 261 /* find info struct */ 262 for (hi = HdrInfo; hi->hi_field != NULL; hi++) 263 { 264 if (strcasecmp(field, hi->hi_field) == 0) 265 break; 266 } 267 268 /* find current place in list -- keep back pointer? */ 269 for (hp = hdrlist; (h = *hp) != NULL; hp = &h->h_link) 270 { 271 if (strcasecmp(field, h->h_field) == 0) 272 break; 273 } 274 275 /* allocate space for new header */ 276 h = (HDR *) xalloc(sizeof *h); 277 h->h_field = field; 278 h->h_value = newstr(value); 279 h->h_link = *hp; 280 h->h_flags = hi->hi_flags | H_DEFAULT; 281 clrbitmap(h->h_mflags); 282 *hp = h; 283 } 284 /* 285 ** HVALUE -- return value of a header. 286 ** 287 ** Only "real" fields (i.e., ones that have not been supplied 288 ** as a default) are used. 289 ** 290 ** Parameters: 291 ** field -- the field name. 292 ** header -- the header list. 293 ** 294 ** Returns: 295 ** pointer to the value part. 296 ** NULL if not found. 297 ** 298 ** Side Effects: 299 ** none. 300 */ 301 302 char * 303 hvalue(field, header) 304 char *field; 305 HDR *header; 306 { 307 register HDR *h; 308 309 for (h = header; h != NULL; h = h->h_link) 310 { 311 if (!bitset(H_DEFAULT, h->h_flags) && 312 strcasecmp(h->h_field, field) == 0) 313 return (h->h_value); 314 } 315 return (NULL); 316 } 317 /* 318 ** ISHEADER -- predicate telling if argument is a header. 319 ** 320 ** A line is a header if it has a single word followed by 321 ** optional white space followed by a colon. 322 ** 323 ** Header fields beginning with two dashes, although technically 324 ** permitted by RFC822, are automatically rejected in order 325 ** to make MIME work out. Without this we could have a technically 326 ** legal header such as ``--"foo:bar"'' that would also be a legal 327 ** MIME separator. 328 ** 329 ** Parameters: 330 ** h -- string to check for possible headerness. 331 ** 332 ** Returns: 333 ** TRUE if h is a header. 334 ** FALSE otherwise. 335 ** 336 ** Side Effects: 337 ** none. 338 */ 339 340 bool 341 isheader(h) 342 char *h; 343 { 344 register char *s = h; 345 346 if (s[0] == '-' && s[1] == '-') 347 return FALSE; 348 349 while (*s > ' ' && *s != ':' && *s != '\0') 350 s++; 351 352 if (h == s) 353 return FALSE; 354 355 /* following technically violates RFC822 */ 356 while (isascii(*s) && isspace(*s)) 357 s++; 358 359 return (*s == ':'); 360 } 361 /* 362 ** EATHEADER -- run through the stored header and extract info. 363 ** 364 ** Parameters: 365 ** e -- the envelope to process. 366 ** full -- if set, do full processing (e.g., compute 367 ** message priority). This should not be set 368 ** when reading a queue file because some info 369 ** needed to compute the priority is wrong. 370 ** 371 ** Returns: 372 ** none. 373 ** 374 ** Side Effects: 375 ** Sets a bunch of global variables from information 376 ** in the collected header. 377 ** Aborts the message if the hop count is exceeded. 378 */ 379 380 void 381 eatheader(e, full) 382 register ENVELOPE *e; 383 bool full; 384 { 385 register HDR *h; 386 register char *p; 387 int hopcnt = 0; 388 char *msgid; 389 char buf[MAXLINE]; 390 391 /* 392 ** Set up macros for possible expansion in headers. 393 */ 394 395 define('f', e->e_sender, e); 396 define('g', e->e_sender, e); 397 if (e->e_origrcpt != NULL && *e->e_origrcpt != '\0') 398 define('u', e->e_origrcpt, e); 399 else 400 define('u', NULL, e); 401 402 /* full name of from person */ 403 p = hvalue("full-name", e->e_header); 404 if (p != NULL) 405 define('x', p, e); 406 407 if (tTd(32, 1)) 408 printf("----- collected header -----\n"); 409 msgid = NULL; 410 for (h = e->e_header; h != NULL; h = h->h_link) 411 { 412 if (h->h_value == NULL) 413 { 414 if (tTd(32, 1)) 415 printf("%s: <NULL>\n", h->h_field); 416 continue; 417 } 418 419 /* do early binding */ 420 if (bitset(H_DEFAULT, h->h_flags)) 421 { 422 expand(h->h_value, buf, sizeof buf, e); 423 if (buf[0] != '\0') 424 { 425 h->h_value = newstr(buf); 426 h->h_flags &= ~H_DEFAULT; 427 } 428 } 429 430 if (tTd(32, 1)) 431 { 432 printf("%s: ", h->h_field); 433 xputs(h->h_value); 434 printf("\n"); 435 } 436 437 /* count the number of times it has been processed */ 438 if (bitset(H_TRACE, h->h_flags)) 439 hopcnt++; 440 441 /* send to this person if we so desire */ 442 if (GrabTo && bitset(H_RCPT, h->h_flags) && 443 !bitset(H_DEFAULT, h->h_flags) && 444 (!bitset(EF_RESENT, e->e_flags) || bitset(H_RESENT, h->h_flags))) 445 { 446 int saveflags = e->e_flags; 447 448 (void) sendtolist(h->h_value, NULLADDR, 449 &e->e_sendqueue, 0, e); 450 451 /* delete fatal errors generated by this address */ 452 if (!GrabTo && !bitset(EF_FATALERRS, saveflags)) 453 e->e_flags &= ~EF_FATALERRS; 454 } 455 456 /* save the message-id for logging */ 457 if (strcasecmp(h->h_field, "message-id") == 0) 458 { 459 msgid = h->h_value; 460 while (isascii(*msgid) && isspace(*msgid)) 461 msgid++; 462 } 463 464 /* see if this is a return-receipt header */ 465 if (bitset(H_RECEIPTTO, h->h_flags)) 466 e->e_receiptto = h->h_value; 467 } 468 if (tTd(32, 1)) 469 printf("----------------------------\n"); 470 471 /* if we are just verifying (that is, sendmail -t -bv), drop out now */ 472 if (OpMode == MD_VERIFY) 473 return; 474 475 /* store hop count */ 476 if (hopcnt > e->e_hopcount) 477 e->e_hopcount = hopcnt; 478 479 /* message priority */ 480 p = hvalue("precedence", e->e_header); 481 if (p != NULL) 482 e->e_class = priencode(p); 483 if (e->e_class < 0) 484 e->e_timeoutclass = TOC_NONURGENT; 485 else if (e->e_class > 0) 486 e->e_timeoutclass = TOC_URGENT; 487 if (full) 488 { 489 e->e_msgpriority = e->e_msgsize 490 - e->e_class * WkClassFact 491 + e->e_nrcpts * WkRecipFact; 492 } 493 494 /* message timeout priority */ 495 p = hvalue("priority", e->e_header); 496 if (p != NULL) 497 { 498 /* (this should be in the configuration file) */ 499 if (strcasecmp(p, "urgent")) 500 e->e_timeoutclass = TOC_URGENT; 501 else if (strcasecmp(p, "normal")) 502 e->e_timeoutclass = TOC_NORMAL; 503 else if (strcasecmp(p, "non-urgent")) 504 e->e_timeoutclass = TOC_NONURGENT; 505 } 506 507 /* date message originated */ 508 p = hvalue("posted-date", e->e_header); 509 if (p == NULL) 510 p = hvalue("date", e->e_header); 511 if (p != NULL) 512 define('a', p, e); 513 514 /* check to see if this is a MIME message */ 515 if ((e->e_bodytype != NULL && 516 strcasecmp(e->e_bodytype, "8BITMIME") == 0) || 517 hvalue("MIME-Version", e->e_header) != NULL) 518 { 519 e->e_flags |= EF_IS_MIME; 520 if (HasEightBits) 521 e->e_bodytype = "8BITMIME"; 522 } 523 524 /* 525 ** From person in antiquated ARPANET mode 526 ** required by UK Grey Book e-mail gateways (sigh) 527 */ 528 529 if (OpMode == MD_ARPAFTP) 530 { 531 register struct hdrinfo *hi; 532 533 for (hi = HdrInfo; hi->hi_field != NULL; hi++) 534 { 535 if (bitset(H_FROM, hi->hi_flags) && 536 (!bitset(H_RESENT, hi->hi_flags) || 537 bitset(EF_RESENT, e->e_flags)) && 538 (p = hvalue(hi->hi_field, e->e_header)) != NULL) 539 break; 540 } 541 if (hi->hi_field != NULL) 542 { 543 if (tTd(32, 2)) 544 printf("eatheader: setsender(*%s == %s)\n", 545 hi->hi_field, p); 546 setsender(p, e, NULL, TRUE); 547 } 548 } 549 550 /* 551 ** Log collection information. 552 */ 553 554 # ifdef LOG 555 if (bitset(EF_LOGSENDER, e->e_flags) && LogLevel > 4) 556 logsender(e, msgid); 557 # endif /* LOG */ 558 e->e_flags &= ~EF_LOGSENDER; 559 } 560 /* 561 ** LOGSENDER -- log sender information 562 ** 563 ** Parameters: 564 ** e -- the envelope to log 565 ** msgid -- the message id 566 ** 567 ** Returns: 568 ** none 569 */ 570 571 void 572 logsender(e, msgid) 573 register ENVELOPE *e; 574 char *msgid; 575 { 576 # ifdef LOG 577 char *name; 578 register char *sbp; 579 register char *p; 580 int l; 581 char hbuf[MAXNAME + 1]; 582 char sbuf[MAXLINE + 1]; 583 char mbuf[MAXNAME + 1]; 584 585 /* don't allow newlines in the message-id */ 586 if (msgid != NULL) 587 { 588 l = strlen(msgid); 589 if (l > sizeof mbuf - 1) 590 l = sizeof mbuf - 1; 591 bcopy(msgid, mbuf, l); 592 mbuf[l] = '\0'; 593 p = mbuf; 594 while ((p = strchr(p, '\n')) != NULL) 595 *p++ = ' '; 596 } 597 598 if (bitset(EF_RESPONSE, e->e_flags)) 599 name = "[RESPONSE]"; 600 else if ((name = macvalue('_', e)) != NULL) 601 ; 602 else if (RealHostName == NULL) 603 name = "localhost"; 604 else if (RealHostName[0] == '[') 605 name = RealHostName; 606 else 607 { 608 name = hbuf; 609 (void) sprintf(hbuf, "%.80s", RealHostName); 610 if (RealHostAddr.sa.sa_family != 0) 611 { 612 p = &hbuf[strlen(hbuf)]; 613 (void) sprintf(p, " (%s)", 614 anynet_ntoa(&RealHostAddr)); 615 } 616 } 617 618 /* some versions of syslog only take 5 printf args */ 619 # if (SYSLOG_BUFSIZE) >= 256 620 sbp = sbuf; 621 sprintf(sbp, "from=%.200s, size=%ld, class=%d, pri=%ld, nrcpts=%d", 622 e->e_from.q_paddr == NULL ? "<NONE>" : e->e_from.q_paddr, 623 e->e_msgsize, e->e_class, e->e_msgpriority, e->e_nrcpts); 624 sbp += strlen(sbp); 625 if (msgid != NULL) 626 { 627 sprintf(sbp, ", msgid=%.100s", mbuf); 628 sbp += strlen(sbp); 629 } 630 if (e->e_bodytype != NULL) 631 { 632 (void) sprintf(sbp, ", bodytype=%.20s", e->e_bodytype); 633 sbp += strlen(sbp); 634 } 635 p = macvalue('r', e); 636 if (p != NULL) 637 (void) sprintf(sbp, ", proto=%.20s", p); 638 syslog(LOG_INFO, "%s: %s, relay=%s", 639 e->e_id, sbuf, name); 640 641 # else /* short syslog buffer */ 642 643 syslog(LOG_INFO, "%s: from=%s", 644 e->e_id, e->e_from.q_paddr == NULL ? "<NONE>" : 645 shortenstring(e->e_from.q_paddr, 83)); 646 syslog(LOG_INFO, "%s: size=%ld, class=%ld, pri=%ld, nrcpts=%d", 647 e->e_id, e->e_msgsize, e->e_class, 648 e->e_msgpriority, e->e_nrcpts); 649 if (msgid != NULL) 650 syslog(LOG_INFO, "%s: msgid=%s", e->e_id, mbuf); 651 sbp = sbuf; 652 sprintf(sbp, "%s:", e->e_id); 653 sbp += strlen(sbp); 654 if (e->e_bodytype != NULL) 655 { 656 sprintf(sbp, " bodytype=%s,", e->e_bodytype); 657 sbp += strlen(sbp); 658 } 659 p = macvalue('r', e); 660 if (p != NULL) 661 { 662 sprintf(sbp, " proto=%s,", p); 663 sbp += strlen(sbp); 664 } 665 syslog(LOG_INFO, "%s relay=%s", sbuf, name); 666 # endif 667 # endif 668 } 669 /* 670 ** PRIENCODE -- encode external priority names into internal values. 671 ** 672 ** Parameters: 673 ** p -- priority in ascii. 674 ** 675 ** Returns: 676 ** priority as a numeric level. 677 ** 678 ** Side Effects: 679 ** none. 680 */ 681 682 int 683 priencode(p) 684 char *p; 685 { 686 register int i; 687 688 for (i = 0; i < NumPriorities; i++) 689 { 690 if (!strcasecmp(p, Priorities[i].pri_name)) 691 return (Priorities[i].pri_val); 692 } 693 694 /* unknown priority */ 695 return (0); 696 } 697 /* 698 ** CRACKADDR -- parse an address and turn it into a macro 699 ** 700 ** This doesn't actually parse the address -- it just extracts 701 ** it and replaces it with "$g". The parse is totally ad hoc 702 ** and isn't even guaranteed to leave something syntactically 703 ** identical to what it started with. However, it does leave 704 ** something semantically identical. 705 ** 706 ** This algorithm has been cleaned up to handle a wider range 707 ** of cases -- notably quoted and backslash escaped strings. 708 ** This modification makes it substantially better at preserving 709 ** the original syntax. 710 ** 711 ** Parameters: 712 ** addr -- the address to be cracked. 713 ** 714 ** Returns: 715 ** a pointer to the new version. 716 ** 717 ** Side Effects: 718 ** none. 719 ** 720 ** Warning: 721 ** The return value is saved in local storage and should 722 ** be copied if it is to be reused. 723 */ 724 725 char * 726 crackaddr(addr) 727 register char *addr; 728 { 729 register char *p; 730 register char c; 731 int cmtlev; 732 int realcmtlev; 733 int anglelev, realanglelev; 734 int copylev; 735 bool qmode; 736 bool realqmode; 737 bool skipping; 738 bool putgmac = FALSE; 739 bool quoteit = FALSE; 740 bool gotangle = FALSE; 741 bool gotcolon = FALSE; 742 register char *bp; 743 char *buflim; 744 char *bufhead; 745 char *addrhead; 746 static char buf[MAXNAME + 1]; 747 748 if (tTd(33, 1)) 749 printf("crackaddr(%s)\n", addr); 750 751 /* strip leading spaces */ 752 while (*addr != '\0' && isascii(*addr) && isspace(*addr)) 753 addr++; 754 755 /* 756 ** Start by assuming we have no angle brackets. This will be 757 ** adjusted later if we find them. 758 */ 759 760 bp = bufhead = buf; 761 buflim = &buf[sizeof buf - 5]; 762 p = addrhead = addr; 763 copylev = anglelev = realanglelev = cmtlev = realcmtlev = 0; 764 qmode = realqmode = FALSE; 765 766 while ((c = *p++) != '\0') 767 { 768 /* 769 ** If the buffer is overful, go into a special "skipping" 770 ** mode that tries to keep legal syntax but doesn't actually 771 ** output things. 772 */ 773 774 skipping = bp >= buflim; 775 776 if (copylev > 0 && !skipping) 777 *bp++ = c; 778 779 /* check for backslash escapes */ 780 if (c == '\\') 781 { 782 /* arrange to quote the address */ 783 if (cmtlev <= 0 && !qmode) 784 quoteit = TRUE; 785 786 if ((c = *p++) == '\0') 787 { 788 /* too far */ 789 p--; 790 goto putg; 791 } 792 if (copylev > 0 && !skipping) 793 *bp++ = c; 794 goto putg; 795 } 796 797 /* check for quoted strings */ 798 if (c == '"' && cmtlev <= 0) 799 { 800 qmode = !qmode; 801 if (copylev > 0 && !skipping) 802 realqmode = !realqmode; 803 continue; 804 } 805 if (qmode) 806 goto putg; 807 808 /* check for comments */ 809 if (c == '(') 810 { 811 cmtlev++; 812 813 /* allow space for closing paren */ 814 if (!skipping) 815 { 816 buflim--; 817 realcmtlev++; 818 if (copylev++ <= 0) 819 { 820 *bp++ = ' '; 821 *bp++ = c; 822 } 823 } 824 } 825 if (cmtlev > 0) 826 { 827 if (c == ')') 828 { 829 cmtlev--; 830 copylev--; 831 if (!skipping) 832 { 833 realcmtlev--; 834 buflim++; 835 } 836 } 837 continue; 838 } 839 else if (c == ')') 840 { 841 /* syntax error: unmatched ) */ 842 if (copylev > 0 && !skipping) 843 bp--; 844 } 845 846 /* check for group: list; syntax */ 847 if (c == ':' && anglelev <= 0 && !gotcolon && !ColonOkInAddr) 848 { 849 register char *q; 850 851 if (*p == ':') 852 { 853 /* special case -- :: syntax */ 854 if (cmtlev <= 0 && !qmode) 855 quoteit = TRUE; 856 if (copylev > 0 && !skipping) 857 { 858 *bp++ = c; 859 *bp++ = c; 860 } 861 p++; 862 goto putg; 863 } 864 865 gotcolon = TRUE; 866 867 bp = bufhead; 868 if (quoteit) 869 { 870 *bp++ = '"'; 871 872 /* back up over the ':' and any spaces */ 873 --p; 874 while (isascii(*--p) && isspace(*p)) 875 continue; 876 p++; 877 } 878 for (q = addrhead; q < p; ) 879 { 880 c = *q++; 881 if (bp < buflim) 882 { 883 if (quoteit && c == '"') 884 *bp++ = '\\'; 885 *bp++ = c; 886 } 887 } 888 if (quoteit) 889 { 890 if (bp == &bufhead[1]) 891 bp--; 892 else 893 *bp++ = '"'; 894 while ((c = *p++) != ':') 895 { 896 if (bp < buflim) 897 *bp++ = c; 898 } 899 *bp++ = c; 900 } 901 902 /* any trailing white space is part of group: */ 903 while (isascii(*p) && isspace(*p) && bp < buflim) 904 *bp++ = *p++; 905 copylev = 0; 906 putgmac = quoteit = FALSE; 907 bufhead = bp; 908 addrhead = p; 909 continue; 910 } 911 912 if (c == ';' && copylev <= 0 && !ColonOkInAddr) 913 { 914 if (bp < buflim) 915 *bp++ = c; 916 } 917 918 /* check for characters that may have to be quoted */ 919 if (strchr(".'@,;:\\()[]", c) != NULL) 920 { 921 /* 922 ** If these occur as the phrase part of a <> 923 ** construct, but are not inside of () or already 924 ** quoted, they will have to be quoted. Note that 925 ** now (but don't actually do the quoting). 926 */ 927 928 if (cmtlev <= 0 && !qmode) 929 quoteit = TRUE; 930 } 931 932 /* check for angle brackets */ 933 if (c == '<') 934 { 935 register char *q; 936 937 /* assume first of two angles is bogus */ 938 if (gotangle) 939 quoteit = TRUE; 940 gotangle = TRUE; 941 942 /* oops -- have to change our mind */ 943 anglelev = 1; 944 if (!skipping) 945 realanglelev = 1; 946 947 bp = bufhead; 948 if (quoteit) 949 { 950 *bp++ = '"'; 951 952 /* back up over the '<' and any spaces */ 953 --p; 954 while (isascii(*--p) && isspace(*p)) 955 continue; 956 p++; 957 } 958 for (q = addrhead; q < p; ) 959 { 960 c = *q++; 961 if (bp < buflim) 962 { 963 if (quoteit && c == '"') 964 *bp++ = '\\'; 965 *bp++ = c; 966 } 967 } 968 if (quoteit) 969 { 970 if (bp == &buf[1]) 971 bp--; 972 else 973 *bp++ = '"'; 974 while ((c = *p++) != '<') 975 { 976 if (bp < buflim) 977 *bp++ = c; 978 } 979 *bp++ = c; 980 } 981 copylev = 0; 982 putgmac = quoteit = FALSE; 983 continue; 984 } 985 986 if (c == '>') 987 { 988 if (anglelev > 0) 989 { 990 anglelev--; 991 if (!skipping) 992 { 993 realanglelev--; 994 buflim++; 995 } 996 } 997 else if (!skipping) 998 { 999 /* syntax error: unmatched > */ 1000 if (copylev > 0) 1001 bp--; 1002 quoteit = TRUE; 1003 continue; 1004 } 1005 if (copylev++ <= 0) 1006 *bp++ = c; 1007 continue; 1008 } 1009 1010 /* must be a real address character */ 1011 putg: 1012 if (copylev <= 0 && !putgmac) 1013 { 1014 *bp++ = MACROEXPAND; 1015 *bp++ = 'g'; 1016 putgmac = TRUE; 1017 } 1018 } 1019 1020 /* repair any syntactic damage */ 1021 if (realqmode) 1022 *bp++ = '"'; 1023 while (realcmtlev-- > 0) 1024 *bp++ = ')'; 1025 while (realanglelev-- > 0) 1026 *bp++ = '>'; 1027 *bp++ = '\0'; 1028 1029 if (tTd(33, 1)) 1030 printf("crackaddr=>`%s'\n", buf); 1031 1032 return (buf); 1033 } 1034 /* 1035 ** PUTHEADER -- put the header part of a message from the in-core copy 1036 ** 1037 ** Parameters: 1038 ** mci -- the connection information. 1039 ** h -- the header to put. 1040 ** e -- envelope to use. 1041 ** 1042 ** Returns: 1043 ** none. 1044 ** 1045 ** Side Effects: 1046 ** none. 1047 */ 1048 1049 /* 1050 * Macro for fast max (not available in e.g. DG/UX, 386/ix). 1051 */ 1052 #ifndef MAX 1053 # define MAX(a,b) (((a)>(b))?(a):(b)) 1054 #endif 1055 1056 void 1057 putheader(mci, h, e) 1058 register MCI *mci; 1059 register HDR *h; 1060 register ENVELOPE *e; 1061 { 1062 char buf[MAX(MAXLINE,BUFSIZ)]; 1063 char obuf[MAXLINE]; 1064 1065 if (tTd(34, 1)) 1066 printf("--- putheader, mailer = %s ---\n", 1067 mci->mci_mailer->m_name); 1068 1069 mci->mci_flags |= MCIF_INHEADER; 1070 for (; h != NULL; h = h->h_link) 1071 { 1072 register char *p = h->h_value; 1073 extern bool bitintersect(); 1074 1075 if (tTd(34, 11)) 1076 { 1077 printf(" %s: ", h->h_field); 1078 xputs(p); 1079 } 1080 1081 /* suppress Content-Transfer-Encoding: if we are MIMEing */ 1082 if (bitset(H_CTE, h->h_flags) && 1083 bitset(MCIF_CVT8TO7|MCIF_INMIME, mci->mci_flags)) 1084 { 1085 if (tTd(34, 11)) 1086 printf(" (skipped (content-transfer-encoding))\n"); 1087 continue; 1088 } 1089 1090 if (bitset(MCIF_INMIME, mci->mci_flags)) 1091 goto vanilla; 1092 1093 if (bitset(H_CHECK|H_ACHECK, h->h_flags) && 1094 !bitintersect(h->h_mflags, mci->mci_mailer->m_flags)) 1095 { 1096 if (tTd(34, 11)) 1097 printf(" (skipped)\n"); 1098 continue; 1099 } 1100 1101 /* handle Resent-... headers specially */ 1102 if (bitset(H_RESENT, h->h_flags) && !bitset(EF_RESENT, e->e_flags)) 1103 { 1104 if (tTd(34, 11)) 1105 printf(" (skipped (resent))\n"); 1106 continue; 1107 } 1108 1109 /* suppress return receipts if requested */ 1110 if (bitset(H_RECEIPTTO, h->h_flags) && 1111 bitset(EF_NORECEIPT, e->e_flags)) 1112 { 1113 if (tTd(34, 11)) 1114 printf(" (skipped (receipt))\n"); 1115 continue; 1116 } 1117 1118 /* macro expand value if generated internally */ 1119 if (bitset(H_DEFAULT, h->h_flags)) 1120 { 1121 expand(p, buf, sizeof buf, e); 1122 p = buf; 1123 if (p == NULL || *p == '\0') 1124 { 1125 if (tTd(34, 11)) 1126 printf(" (skipped -- null value)\n"); 1127 continue; 1128 } 1129 } 1130 1131 if (tTd(34, 11)) 1132 printf("\n"); 1133 1134 if (bitset(H_STRIPVAL, h->h_flags)) 1135 { 1136 /* empty field */ 1137 (void) sprintf(obuf, "%s:", h->h_field); 1138 putline(obuf, mci); 1139 } 1140 else if (bitset(H_FROM|H_RCPT, h->h_flags)) 1141 { 1142 /* address field */ 1143 bool oldstyle = bitset(EF_OLDSTYLE, e->e_flags); 1144 1145 if (bitset(H_FROM, h->h_flags)) 1146 oldstyle = FALSE; 1147 commaize(h, p, oldstyle, mci, e); 1148 } 1149 else 1150 { 1151 /* vanilla header line */ 1152 register char *nlp; 1153 1154 vanilla: 1155 (void) sprintf(obuf, "%s: ", h->h_field); 1156 while ((nlp = strchr(p, '\n')) != NULL) 1157 { 1158 *nlp = '\0'; 1159 (void) strcat(obuf, p); 1160 *nlp = '\n'; 1161 putline(obuf, mci); 1162 p = ++nlp; 1163 obuf[0] = '\0'; 1164 } 1165 (void) strcat(obuf, p); 1166 putline(obuf, mci); 1167 } 1168 } 1169 1170 /* 1171 ** If we are converting this to a MIME message, add the 1172 ** MIME headers. 1173 */ 1174 1175 #if MIME8TO7 1176 if (bitset(MM_MIME8BIT, MimeMode) && 1177 bitset(EF_HAS8BIT, e->e_flags) && 1178 !bitnset(M_8BITS, mci->mci_mailer->m_flags) && 1179 !bitset(MCIF_CVT8TO7, mci->mci_flags)) 1180 { 1181 if (hvalue("MIME-Version", e->e_header) == NULL) 1182 putline("MIME-Version: 1.0", mci); 1183 if (hvalue("Content-Type", e->e_header) == NULL) 1184 { 1185 sprintf(obuf, "Content-Type: text/plain; charset=%s", 1186 defcharset(e)); 1187 putline(obuf, mci); 1188 } 1189 if (hvalue("Content-Transfer-Encoding", e->e_header) == NULL) 1190 putline("Content-Transfer-Encoding: 8bit", mci); 1191 } 1192 #endif 1193 } 1194 /* 1195 ** COMMAIZE -- output a header field, making a comma-translated list. 1196 ** 1197 ** Parameters: 1198 ** h -- the header field to output. 1199 ** p -- the value to put in it. 1200 ** oldstyle -- TRUE if this is an old style header. 1201 ** mci -- the connection information. 1202 ** e -- the envelope containing the message. 1203 ** 1204 ** Returns: 1205 ** none. 1206 ** 1207 ** Side Effects: 1208 ** outputs "p" to file "fp". 1209 */ 1210 1211 void 1212 commaize(h, p, oldstyle, mci, e) 1213 register HDR *h; 1214 register char *p; 1215 bool oldstyle; 1216 register MCI *mci; 1217 register ENVELOPE *e; 1218 { 1219 register char *obp; 1220 int opos; 1221 int omax; 1222 bool firstone = TRUE; 1223 char obuf[MAXLINE + 3]; 1224 1225 /* 1226 ** Output the address list translated by the 1227 ** mailer and with commas. 1228 */ 1229 1230 if (tTd(14, 2)) 1231 printf("commaize(%s: %s)\n", h->h_field, p); 1232 1233 obp = obuf; 1234 (void) sprintf(obp, "%s: ", h->h_field); 1235 opos = strlen(h->h_field) + 2; 1236 obp += opos; 1237 omax = mci->mci_mailer->m_linelimit - 2; 1238 if (omax < 0 || omax > 78) 1239 omax = 78; 1240 1241 /* 1242 ** Run through the list of values. 1243 */ 1244 1245 while (*p != '\0') 1246 { 1247 register char *name; 1248 register int c; 1249 char savechar; 1250 int flags; 1251 auto int stat; 1252 1253 /* 1254 ** Find the end of the name. New style names 1255 ** end with a comma, old style names end with 1256 ** a space character. However, spaces do not 1257 ** necessarily delimit an old-style name -- at 1258 ** signs mean keep going. 1259 */ 1260 1261 /* find end of name */ 1262 while ((isascii(*p) && isspace(*p)) || *p == ',') 1263 p++; 1264 name = p; 1265 for (;;) 1266 { 1267 auto char *oldp; 1268 char pvpbuf[PSBUFSIZE]; 1269 1270 (void) prescan(p, oldstyle ? ' ' : ',', pvpbuf, 1271 sizeof pvpbuf, &oldp, NULL); 1272 p = oldp; 1273 1274 /* look to see if we have an at sign */ 1275 while (*p != '\0' && isascii(*p) && isspace(*p)) 1276 p++; 1277 1278 if (*p != '@') 1279 { 1280 p = oldp; 1281 break; 1282 } 1283 p += *p == '@' ? 1 : 2; 1284 while (*p != '\0' && isascii(*p) && isspace(*p)) 1285 p++; 1286 } 1287 /* at the end of one complete name */ 1288 1289 /* strip off trailing white space */ 1290 while (p >= name && 1291 ((isascii(*p) && isspace(*p)) || *p == ',' || *p == '\0')) 1292 p--; 1293 if (++p == name) 1294 continue; 1295 savechar = *p; 1296 *p = '\0'; 1297 1298 /* translate the name to be relative */ 1299 flags = RF_HEADERADDR|RF_ADDDOMAIN; 1300 if (bitset(H_FROM, h->h_flags)) 1301 flags |= RF_SENDERADDR; 1302 #if USERDB 1303 else if (e->e_from.q_mailer != NULL && 1304 bitnset(M_UDBRECIPIENT, e->e_from.q_mailer->m_flags)) 1305 { 1306 extern char *udbsender(); 1307 1308 name = udbsender(name); 1309 } 1310 #endif 1311 stat = EX_OK; 1312 name = remotename(name, mci->mci_mailer, flags, &stat, e); 1313 if (*name == '\0') 1314 { 1315 *p = savechar; 1316 continue; 1317 } 1318 1319 /* output the name with nice formatting */ 1320 opos += strlen(name); 1321 if (!firstone) 1322 opos += 2; 1323 if (opos > omax && !firstone) 1324 { 1325 (void) strcpy(obp, ",\n"); 1326 putline(obuf, mci); 1327 obp = obuf; 1328 (void) strcpy(obp, " "); 1329 opos = strlen(obp); 1330 obp += opos; 1331 opos += strlen(name); 1332 } 1333 else if (!firstone) 1334 { 1335 (void) strcpy(obp, ", "); 1336 obp += 2; 1337 } 1338 1339 while ((c = *name++) != '\0' && obp < &obuf[MAXLINE]) 1340 *obp++ = c; 1341 firstone = FALSE; 1342 *p = savechar; 1343 } 1344 (void) strcpy(obp, "\n"); 1345 putline(obuf, mci); 1346 } 1347 /* 1348 ** COPYHEADER -- copy header list 1349 ** 1350 ** This routine is the equivalent of newstr for header lists 1351 ** 1352 ** Parameters: 1353 ** header -- list of header structures to copy. 1354 ** 1355 ** Returns: 1356 ** a copy of 'header'. 1357 ** 1358 ** Side Effects: 1359 ** none. 1360 */ 1361 1362 HDR * 1363 copyheader(header) 1364 register HDR *header; 1365 { 1366 register HDR *newhdr; 1367 HDR *ret; 1368 register HDR **tail = &ret; 1369 1370 while (header != NULL) 1371 { 1372 newhdr = (HDR *) xalloc(sizeof(HDR)); 1373 STRUCTCOPY(*header, *newhdr); 1374 *tail = newhdr; 1375 tail = &newhdr->h_link; 1376 header = header->h_link; 1377 } 1378 *tail = NULL; 1379 1380 return ret; 1381 } 1382