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[] = "@(#)deliver.c 8.89 (Berkeley) 07/23/94"; 11 #endif /* not lint */ 12 13 #include "sendmail.h" 14 #include <netdb.h> 15 #include <errno.h> 16 #if NAMED_BIND 17 #include <resolv.h> 18 19 extern int h_errno; 20 #endif 21 22 extern char SmtpError[]; 23 24 /* 25 ** SENDALL -- actually send all the messages. 26 ** 27 ** Parameters: 28 ** e -- the envelope to send. 29 ** mode -- the delivery mode to use. If SM_DEFAULT, use 30 ** the current e->e_sendmode. 31 ** 32 ** Returns: 33 ** none. 34 ** 35 ** Side Effects: 36 ** Scans the send lists and sends everything it finds. 37 ** Delivers any appropriate error messages. 38 ** If we are running in a non-interactive mode, takes the 39 ** appropriate action. 40 */ 41 42 sendall(e, mode) 43 ENVELOPE *e; 44 char mode; 45 { 46 register ADDRESS *q; 47 char *owner; 48 int otherowners; 49 register ENVELOPE *ee; 50 ENVELOPE *splitenv = NULL; 51 bool announcequeueup; 52 53 /* 54 ** If we have had global, fatal errors, don't bother sending 55 ** the message at all if we are in SMTP mode. Local errors 56 ** (e.g., a single address failing) will still cause the other 57 ** addresses to be sent. 58 */ 59 60 if (bitset(EF_FATALERRS, e->e_flags) && 61 (OpMode == MD_SMTP || OpMode == MD_DAEMON)) 62 { 63 e->e_flags |= EF_CLRQUEUE; 64 return; 65 } 66 67 /* determine actual delivery mode */ 68 CurrentLA = getla(); 69 if (mode == SM_DEFAULT) 70 { 71 mode = e->e_sendmode; 72 if (mode != SM_VERIFY && 73 shouldqueue(e->e_msgpriority, e->e_ctime)) 74 mode = SM_QUEUE; 75 announcequeueup = mode == SM_QUEUE; 76 } 77 else 78 announcequeueup = FALSE; 79 80 if (tTd(13, 1)) 81 { 82 printf("\n===== SENDALL: mode %c, id %s, e_from ", 83 mode, e->e_id); 84 printaddr(&e->e_from, FALSE); 85 printf("sendqueue:\n"); 86 printaddr(e->e_sendqueue, TRUE); 87 } 88 89 /* 90 ** Do any preprocessing necessary for the mode we are running. 91 ** Check to make sure the hop count is reasonable. 92 ** Delete sends to the sender in mailing lists. 93 */ 94 95 CurEnv = e; 96 97 if (e->e_hopcount > MaxHopCount) 98 { 99 errno = 0; 100 e->e_flags |= EF_FATALERRS|EF_PM_NOTIFY|EF_CLRQUEUE; 101 syserr("554 too many hops %d (%d max): from %s via %s, to %s", 102 e->e_hopcount, MaxHopCount, e->e_from.q_paddr, 103 RealHostName == NULL ? "localhost" : RealHostName, 104 e->e_sendqueue->q_paddr); 105 return; 106 } 107 108 /* 109 ** Do sender deletion. 110 ** 111 ** If the sender has the QQUEUEUP flag set, skip this. 112 ** This can happen if the name server is hosed when you 113 ** are trying to send mail. The result is that the sender 114 ** is instantiated in the queue as a recipient. 115 */ 116 117 if (!bitset(EF_METOO, e->e_flags) && 118 !bitset(QQUEUEUP, e->e_from.q_flags)) 119 { 120 if (tTd(13, 5)) 121 { 122 printf("sendall: QDONTSEND "); 123 printaddr(&e->e_from, FALSE); 124 } 125 e->e_from.q_flags |= QDONTSEND; 126 (void) recipient(&e->e_from, &e->e_sendqueue, e); 127 } 128 129 /* 130 ** Handle alias owners. 131 ** 132 ** We scan up the q_alias chain looking for owners. 133 ** We discard owners that are the same as the return path. 134 */ 135 136 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 137 { 138 register struct address *a; 139 140 for (a = q; a != NULL && a->q_owner == NULL; a = a->q_alias) 141 continue; 142 if (a != NULL) 143 q->q_owner = a->q_owner; 144 145 if (q->q_owner != NULL && 146 !bitset(QDONTSEND, q->q_flags) && 147 strcmp(q->q_owner, e->e_from.q_paddr) == 0) 148 q->q_owner = NULL; 149 } 150 151 owner = ""; 152 otherowners = 1; 153 while (owner != NULL && otherowners > 0) 154 { 155 owner = NULL; 156 otherowners = 0; 157 158 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 159 { 160 if (bitset(QDONTSEND, q->q_flags)) 161 continue; 162 163 if (q->q_owner != NULL) 164 { 165 if (owner == NULL) 166 owner = q->q_owner; 167 else if (owner != q->q_owner) 168 { 169 if (strcmp(owner, q->q_owner) == 0) 170 { 171 /* make future comparisons cheap */ 172 q->q_owner = owner; 173 } 174 else 175 { 176 otherowners++; 177 } 178 owner = q->q_owner; 179 } 180 } 181 else 182 { 183 otherowners++; 184 } 185 } 186 187 if (owner != NULL && otherowners > 0) 188 { 189 extern HDR *copyheader(); 190 extern ADDRESS *copyqueue(); 191 192 /* 193 ** Split this envelope into two. 194 */ 195 196 ee = (ENVELOPE *) xalloc(sizeof(ENVELOPE)); 197 *ee = *e; 198 ee->e_id = NULL; 199 (void) queuename(ee, '\0'); 200 201 if (tTd(13, 1)) 202 printf("sendall: split %s into %s\n", 203 e->e_id, ee->e_id); 204 205 ee->e_header = copyheader(e->e_header); 206 ee->e_sendqueue = copyqueue(e->e_sendqueue); 207 ee->e_errorqueue = copyqueue(e->e_errorqueue); 208 ee->e_flags = e->e_flags & ~(EF_INQUEUE|EF_CLRQUEUE|EF_FATALERRS|EF_SENDRECEIPT); 209 ee->e_flags |= EF_NORECEIPT; 210 setsender(owner, ee, NULL, TRUE); 211 if (tTd(13, 5)) 212 { 213 printf("sendall(split): QDONTSEND "); 214 printaddr(&ee->e_from, FALSE); 215 } 216 ee->e_from.q_flags |= QDONTSEND; 217 ee->e_dfp = NULL; 218 ee->e_xfp = NULL; 219 ee->e_df = NULL; 220 ee->e_errormode = EM_MAIL; 221 ee->e_sibling = splitenv; 222 splitenv = ee; 223 224 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 225 if (q->q_owner == owner) 226 { 227 q->q_flags |= QDONTSEND; 228 q->q_flags &= ~QQUEUEUP; 229 } 230 for (q = ee->e_sendqueue; q != NULL; q = q->q_next) 231 if (q->q_owner != owner) 232 { 233 q->q_flags |= QDONTSEND; 234 q->q_flags &= ~QQUEUEUP; 235 } 236 237 if (e->e_df != NULL && mode != SM_VERIFY) 238 { 239 ee->e_dfp = NULL; 240 ee->e_df = queuename(ee, 'd'); 241 ee->e_df = newstr(ee->e_df); 242 if (link(e->e_df, ee->e_df) < 0) 243 { 244 syserr("sendall: link(%s, %s)", 245 e->e_df, ee->e_df); 246 } 247 } 248 #ifdef LOG 249 if (LogLevel > 4) 250 syslog(LOG_INFO, "%s: clone %s, owner=%s", 251 ee->e_id, e->e_id, owner); 252 #endif 253 } 254 } 255 256 if (owner != NULL) 257 { 258 setsender(owner, e, NULL, TRUE); 259 if (tTd(13, 5)) 260 { 261 printf("sendall(owner): QDONTSEND "); 262 printaddr(&e->e_from, FALSE); 263 } 264 e->e_from.q_flags |= QDONTSEND; 265 e->e_errormode = EM_MAIL; 266 e->e_flags |= EF_NORECEIPT; 267 } 268 269 # ifdef QUEUE 270 if ((mode == SM_QUEUE || mode == SM_FORK || 271 (mode != SM_VERIFY && SuperSafe)) && 272 !bitset(EF_INQUEUE, e->e_flags)) 273 { 274 /* be sure everything is instantiated in the queue */ 275 queueup(e, TRUE, announcequeueup); 276 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 277 queueup(ee, TRUE, announcequeueup); 278 } 279 #endif /* QUEUE */ 280 281 if (splitenv != NULL) 282 { 283 if (tTd(13, 1)) 284 { 285 printf("\nsendall: Split queue; remaining queue:\n"); 286 printaddr(e->e_sendqueue, TRUE); 287 } 288 289 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 290 { 291 CurEnv = ee; 292 if (mode != SM_VERIFY) 293 openxscript(ee); 294 sendenvelope(ee, mode); 295 dropenvelope(ee); 296 } 297 298 CurEnv = e; 299 } 300 sendenvelope(e, mode); 301 } 302 303 sendenvelope(e, mode) 304 register ENVELOPE *e; 305 char mode; 306 { 307 bool oldverbose; 308 int pid; 309 register ADDRESS *q; 310 char *qf; 311 char *id; 312 313 /* 314 ** If we have had global, fatal errors, don't bother sending 315 ** the message at all if we are in SMTP mode. Local errors 316 ** (e.g., a single address failing) will still cause the other 317 ** addresses to be sent. 318 */ 319 320 if (bitset(EF_FATALERRS, e->e_flags) && 321 (OpMode == MD_SMTP || OpMode == MD_DAEMON)) 322 { 323 e->e_flags |= EF_CLRQUEUE; 324 return; 325 } 326 327 oldverbose = Verbose; 328 switch (mode) 329 { 330 case SM_VERIFY: 331 Verbose = TRUE; 332 break; 333 334 case SM_QUEUE: 335 queueonly: 336 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 337 return; 338 339 case SM_FORK: 340 if (e->e_xfp != NULL) 341 (void) fflush(e->e_xfp); 342 343 # if !HASFLOCK 344 /* 345 ** Since fcntl locking has the interesting semantic that 346 ** the lock is owned by a process, not by an open file 347 ** descriptor, we have to flush this to the queue, and 348 ** then restart from scratch in the child. 349 */ 350 351 /* save id for future use */ 352 id = e->e_id; 353 354 /* now drop the envelope in the parent */ 355 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 356 dropenvelope(e); 357 358 /* and reacquire in the child */ 359 (void) dowork(id, TRUE, FALSE, e); 360 361 return; 362 363 # else /* HASFLOCK */ 364 365 pid = fork(); 366 if (pid < 0) 367 { 368 goto queueonly; 369 } 370 else if (pid > 0) 371 { 372 /* be sure we leave the temp files to our child */ 373 /* can't call unlockqueue to avoid unlink of xfp */ 374 if (e->e_lockfp != NULL) 375 (void) xfclose(e->e_lockfp, "sendenvelope", "lockfp"); 376 e->e_lockfp = NULL; 377 378 /* close any random open files in the envelope */ 379 closexscript(e); 380 if (e->e_dfp != NULL) 381 (void) xfclose(e->e_dfp, "sendenvelope", e->e_df); 382 e->e_dfp = NULL; 383 e->e_id = e->e_df = NULL; 384 385 /* catch intermediate zombie */ 386 (void) waitfor(pid); 387 return; 388 } 389 390 /* double fork to avoid zombies */ 391 pid = fork(); 392 if (pid > 0) 393 exit(EX_OK); 394 395 /* be sure we are immune from the terminal */ 396 disconnect(1, e); 397 398 /* prevent parent from waiting if there was an error */ 399 if (pid < 0) 400 { 401 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 402 finis(); 403 } 404 405 /* 406 ** Close any cached connections. 407 ** 408 ** We don't send the QUIT protocol because the parent 409 ** still knows about the connection. 410 ** 411 ** This should only happen when delivering an error 412 ** message. 413 */ 414 415 mci_flush(FALSE, NULL); 416 417 # endif /* HASFLOCK */ 418 419 break; 420 } 421 422 /* 423 ** Run through the list and send everything. 424 ** 425 ** Set EF_GLOBALERRS so that error messages during delivery 426 ** result in returned mail. 427 */ 428 429 e->e_nsent = 0; 430 e->e_flags |= EF_GLOBALERRS; 431 432 /* now run through the queue */ 433 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 434 { 435 #ifdef XDEBUG 436 char wbuf[MAXNAME + 20]; 437 438 (void) sprintf(wbuf, "sendall(%s)", q->q_paddr); 439 checkfd012(wbuf); 440 #endif 441 if (mode == SM_VERIFY) 442 { 443 e->e_to = q->q_paddr; 444 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 445 { 446 if (q->q_host != NULL && q->q_host[0] != '\0') 447 message("deliverable: mailer %s, host %s, user %s", 448 q->q_mailer->m_name, 449 q->q_host, 450 q->q_user); 451 else 452 message("deliverable: mailer %s, user %s", 453 q->q_mailer->m_name, 454 q->q_user); 455 } 456 } 457 else if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 458 { 459 # ifdef QUEUE 460 /* 461 ** Checkpoint the send list every few addresses 462 */ 463 464 if (e->e_nsent >= CheckpointInterval) 465 { 466 queueup(e, TRUE, FALSE); 467 e->e_nsent = 0; 468 } 469 # endif /* QUEUE */ 470 (void) deliver(e, q); 471 } 472 } 473 Verbose = oldverbose; 474 475 #ifdef XDEBUG 476 checkfd012("end of sendenvelope"); 477 #endif 478 479 if (mode == SM_FORK) 480 finis(); 481 } 482 /* 483 ** DOFORK -- do a fork, retrying a couple of times on failure. 484 ** 485 ** This MUST be a macro, since after a vfork we are running 486 ** two processes on the same stack!!! 487 ** 488 ** Parameters: 489 ** none. 490 ** 491 ** Returns: 492 ** From a macro??? You've got to be kidding! 493 ** 494 ** Side Effects: 495 ** Modifies the ==> LOCAL <== variable 'pid', leaving: 496 ** pid of child in parent, zero in child. 497 ** -1 on unrecoverable error. 498 ** 499 ** Notes: 500 ** I'm awfully sorry this looks so awful. That's 501 ** vfork for you..... 502 */ 503 504 # define NFORKTRIES 5 505 506 # ifndef FORK 507 # define FORK fork 508 # endif 509 510 # define DOFORK(fORKfN) \ 511 {\ 512 register int i;\ 513 \ 514 for (i = NFORKTRIES; --i >= 0; )\ 515 {\ 516 pid = fORKfN();\ 517 if (pid >= 0)\ 518 break;\ 519 if (i > 0)\ 520 sleep((unsigned) NFORKTRIES - i);\ 521 }\ 522 } 523 /* 524 ** DOFORK -- simple fork interface to DOFORK. 525 ** 526 ** Parameters: 527 ** none. 528 ** 529 ** Returns: 530 ** pid of child in parent. 531 ** zero in child. 532 ** -1 on error. 533 ** 534 ** Side Effects: 535 ** returns twice, once in parent and once in child. 536 */ 537 538 dofork() 539 { 540 register int pid; 541 542 DOFORK(fork); 543 return (pid); 544 } 545 /* 546 ** DELIVER -- Deliver a message to a list of addresses. 547 ** 548 ** This routine delivers to everyone on the same host as the 549 ** user on the head of the list. It is clever about mailers 550 ** that don't handle multiple users. It is NOT guaranteed 551 ** that it will deliver to all these addresses however -- so 552 ** deliver should be called once for each address on the 553 ** list. 554 ** 555 ** Parameters: 556 ** e -- the envelope to deliver. 557 ** firstto -- head of the address list to deliver to. 558 ** 559 ** Returns: 560 ** zero -- successfully delivered. 561 ** else -- some failure, see ExitStat for more info. 562 ** 563 ** Side Effects: 564 ** The standard input is passed off to someone. 565 */ 566 567 deliver(e, firstto) 568 register ENVELOPE *e; 569 ADDRESS *firstto; 570 { 571 char *host; /* host being sent to */ 572 char *user; /* user being sent to */ 573 char **pvp; 574 register char **mvp; 575 register char *p; 576 register MAILER *m; /* mailer for this recipient */ 577 ADDRESS *ctladdr; 578 register MCI *mci; 579 register ADDRESS *to = firstto; 580 bool clever = FALSE; /* running user smtp to this mailer */ 581 ADDRESS *tochain = NULL; /* chain of users in this mailer call */ 582 int rcode; /* response code */ 583 char *firstsig; /* signature of firstto */ 584 int pid; 585 char *curhost; 586 int mpvect[2]; 587 int rpvect[2]; 588 char *pv[MAXPV+1]; 589 char tobuf[TOBUFSIZE]; /* text line of to people */ 590 char buf[MAXNAME]; 591 char rpathbuf[MAXNAME]; /* translated return path */ 592 extern int checkcompat(); 593 594 errno = 0; 595 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags)) 596 return (0); 597 598 #if NAMED_BIND 599 /* unless interactive, try twice, over a minute */ 600 if (OpMode == MD_DAEMON || OpMode == MD_SMTP) 601 { 602 _res.retrans = 30; 603 _res.retry = 2; 604 } 605 #endif 606 607 m = to->q_mailer; 608 host = to->q_host; 609 CurEnv = e; /* just in case */ 610 e->e_statmsg = NULL; 611 SmtpError[0] = '\0'; 612 613 if (tTd(10, 1)) 614 printf("\n--deliver, id=%s, mailer=%s, host=`%s', first user=`%s'\n", 615 e->e_id, m->m_name, host, to->q_user); 616 if (tTd(10, 100)) 617 printopenfds(FALSE); 618 619 /* 620 ** If this mailer is expensive, and if we don't want to make 621 ** connections now, just mark these addresses and return. 622 ** This is useful if we want to batch connections to 623 ** reduce load. This will cause the messages to be 624 ** queued up, and a daemon will come along to send the 625 ** messages later. 626 ** This should be on a per-mailer basis. 627 */ 628 629 if (NoConnect && bitnset(M_EXPENSIVE, m->m_flags) && !Verbose) 630 { 631 for (; to != NULL; to = to->q_next) 632 { 633 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 634 to->q_mailer != m) 635 continue; 636 to->q_flags |= QQUEUEUP; 637 e->e_to = to->q_paddr; 638 message("queued"); 639 if (LogLevel > 8) 640 logdelivery(m, NULL, "queued", NULL, e); 641 } 642 e->e_to = NULL; 643 return (0); 644 } 645 646 /* 647 ** Do initial argv setup. 648 ** Insert the mailer name. Notice that $x expansion is 649 ** NOT done on the mailer name. Then, if the mailer has 650 ** a picky -f flag, we insert it as appropriate. This 651 ** code does not check for 'pv' overflow; this places a 652 ** manifest lower limit of 4 for MAXPV. 653 ** The from address rewrite is expected to make 654 ** the address relative to the other end. 655 */ 656 657 /* rewrite from address, using rewriting rules */ 658 rcode = EX_OK; 659 (void) strcpy(rpathbuf, remotename(e->e_from.q_paddr, m, 660 RF_SENDERADDR|RF_CANONICAL, 661 &rcode, e)); 662 define('g', rpathbuf, e); /* translated return path */ 663 define('h', host, e); /* to host */ 664 Errors = 0; 665 pvp = pv; 666 *pvp++ = m->m_argv[0]; 667 668 /* insert -f or -r flag as appropriate */ 669 if (FromFlag && (bitnset(M_FOPT, m->m_flags) || bitnset(M_ROPT, m->m_flags))) 670 { 671 if (bitnset(M_FOPT, m->m_flags)) 672 *pvp++ = "-f"; 673 else 674 *pvp++ = "-r"; 675 *pvp++ = newstr(rpathbuf); 676 } 677 678 /* 679 ** Append the other fixed parts of the argv. These run 680 ** up to the first entry containing "$u". There can only 681 ** be one of these, and there are only a few more slots 682 ** in the pv after it. 683 */ 684 685 for (mvp = m->m_argv; (p = *++mvp) != NULL; ) 686 { 687 /* can't use strchr here because of sign extension problems */ 688 while (*p != '\0') 689 { 690 if ((*p++ & 0377) == MACROEXPAND) 691 { 692 if (*p == 'u') 693 break; 694 } 695 } 696 697 if (*p != '\0') 698 break; 699 700 /* this entry is safe -- go ahead and process it */ 701 expand(*mvp, buf, &buf[sizeof buf - 1], e); 702 *pvp++ = newstr(buf); 703 if (pvp >= &pv[MAXPV - 3]) 704 { 705 syserr("554 Too many parameters to %s before $u", pv[0]); 706 return (-1); 707 } 708 } 709 710 /* 711 ** If we have no substitution for the user name in the argument 712 ** list, we know that we must supply the names otherwise -- and 713 ** SMTP is the answer!! 714 */ 715 716 if (*mvp == NULL) 717 { 718 /* running SMTP */ 719 # ifdef SMTP 720 clever = TRUE; 721 *pvp = NULL; 722 # else /* SMTP */ 723 /* oops! we don't implement SMTP */ 724 syserr("554 SMTP style mailer not implemented"); 725 return (EX_SOFTWARE); 726 # endif /* SMTP */ 727 } 728 729 /* 730 ** At this point *mvp points to the argument with $u. We 731 ** run through our address list and append all the addresses 732 ** we can. If we run out of space, do not fret! We can 733 ** always send another copy later. 734 */ 735 736 tobuf[0] = '\0'; 737 e->e_to = tobuf; 738 ctladdr = NULL; 739 firstsig = hostsignature(firstto->q_mailer, firstto->q_host, e); 740 for (; to != NULL; to = to->q_next) 741 { 742 /* avoid sending multiple recipients to dumb mailers */ 743 if (tobuf[0] != '\0' && !bitnset(M_MUSER, m->m_flags)) 744 break; 745 746 /* if already sent or not for this host, don't send */ 747 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 748 to->q_mailer != firstto->q_mailer || 749 strcmp(hostsignature(to->q_mailer, to->q_host, e), firstsig) != 0) 750 continue; 751 752 /* avoid overflowing tobuf */ 753 if (sizeof tobuf < (strlen(to->q_paddr) + strlen(tobuf) + 2)) 754 break; 755 756 if (tTd(10, 1)) 757 { 758 printf("\nsend to "); 759 printaddr(to, FALSE); 760 } 761 762 /* compute effective uid/gid when sending */ 763 if (bitnset(M_RUNASRCPT, to->q_mailer->m_flags)) 764 ctladdr = getctladdr(to); 765 766 user = to->q_user; 767 e->e_to = to->q_paddr; 768 if (tTd(10, 5)) 769 { 770 printf("deliver: QDONTSEND "); 771 printaddr(to, FALSE); 772 } 773 to->q_flags |= QDONTSEND; 774 775 /* 776 ** Check to see that these people are allowed to 777 ** talk to each other. 778 */ 779 780 if (m->m_maxsize != 0 && e->e_msgsize > m->m_maxsize) 781 { 782 e->e_flags |= EF_NORETURN; 783 usrerr("552 Message is too large; %ld bytes max", m->m_maxsize); 784 giveresponse(EX_UNAVAILABLE, m, NULL, ctladdr, e); 785 continue; 786 } 787 #if NAMED_BIND 788 h_errno = 0; 789 #endif 790 rcode = checkcompat(to, e); 791 if (rcode != EX_OK) 792 { 793 markfailure(e, to, rcode); 794 giveresponse(rcode, m, NULL, ctladdr, e); 795 continue; 796 } 797 798 /* 799 ** Strip quote bits from names if the mailer is dumb 800 ** about them. 801 */ 802 803 if (bitnset(M_STRIPQ, m->m_flags)) 804 { 805 stripquotes(user); 806 stripquotes(host); 807 } 808 809 /* hack attack -- delivermail compatibility */ 810 if (m == ProgMailer && *user == '|') 811 user++; 812 813 /* 814 ** If an error message has already been given, don't 815 ** bother to send to this address. 816 ** 817 ** >>>>>>>>>> This clause assumes that the local mailer 818 ** >> NOTE >> cannot do any further aliasing; that 819 ** >>>>>>>>>> function is subsumed by sendmail. 820 */ 821 822 if (bitset(QBADADDR|QQUEUEUP, to->q_flags)) 823 continue; 824 825 /* save statistics.... */ 826 markstats(e, to); 827 828 /* 829 ** See if this user name is "special". 830 ** If the user name has a slash in it, assume that this 831 ** is a file -- send it off without further ado. Note 832 ** that this type of addresses is not processed along 833 ** with the others, so we fudge on the To person. 834 */ 835 836 if (m == FileMailer) 837 { 838 rcode = mailfile(user, ctladdr, e); 839 giveresponse(rcode, m, NULL, ctladdr, e); 840 if (rcode == EX_OK) 841 to->q_flags |= QSENT; 842 continue; 843 } 844 845 /* 846 ** Address is verified -- add this user to mailer 847 ** argv, and add it to the print list of recipients. 848 */ 849 850 /* link together the chain of recipients */ 851 to->q_tchain = tochain; 852 tochain = to; 853 854 /* create list of users for error messages */ 855 (void) strcat(tobuf, ","); 856 (void) strcat(tobuf, to->q_paddr); 857 define('u', user, e); /* to user */ 858 p = to->q_home; 859 if (p == NULL && ctladdr != NULL) 860 p = ctladdr->q_home; 861 define('z', p, e); /* user's home */ 862 863 /* 864 ** Expand out this user into argument list. 865 */ 866 867 if (!clever) 868 { 869 expand(*mvp, buf, &buf[sizeof buf - 1], e); 870 *pvp++ = newstr(buf); 871 if (pvp >= &pv[MAXPV - 2]) 872 { 873 /* allow some space for trailing parms */ 874 break; 875 } 876 } 877 } 878 879 /* see if any addresses still exist */ 880 if (tobuf[0] == '\0') 881 { 882 define('g', (char *) NULL, e); 883 return (0); 884 } 885 886 /* print out messages as full list */ 887 e->e_to = tobuf + 1; 888 889 /* 890 ** Fill out any parameters after the $u parameter. 891 */ 892 893 while (!clever && *++mvp != NULL) 894 { 895 expand(*mvp, buf, &buf[sizeof buf - 1], e); 896 *pvp++ = newstr(buf); 897 if (pvp >= &pv[MAXPV]) 898 syserr("554 deliver: pv overflow after $u for %s", pv[0]); 899 } 900 *pvp++ = NULL; 901 902 /* 903 ** Call the mailer. 904 ** The argument vector gets built, pipes 905 ** are created as necessary, and we fork & exec as 906 ** appropriate. 907 ** If we are running SMTP, we just need to clean up. 908 */ 909 910 /*XXX this seems a bit wierd */ 911 if (ctladdr == NULL && m != ProgMailer && 912 bitset(QGOODUID, e->e_from.q_flags)) 913 ctladdr = &e->e_from; 914 915 #if NAMED_BIND 916 if (ConfigLevel < 2) 917 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 918 #endif 919 920 if (tTd(11, 1)) 921 { 922 printf("openmailer:"); 923 printav(pv); 924 } 925 errno = 0; 926 #if NAMED_BIND 927 h_errno = 0; 928 #endif 929 930 CurHostName = m->m_mailer; 931 932 /* 933 ** Deal with the special case of mail handled through an IPC 934 ** connection. 935 ** In this case we don't actually fork. We must be 936 ** running SMTP for this to work. We will return a 937 ** zero pid to indicate that we are running IPC. 938 ** We also handle a debug version that just talks to stdin/out. 939 */ 940 941 curhost = NULL; 942 SmtpPhase = NULL; 943 mci = NULL; 944 945 #ifdef XDEBUG 946 { 947 char wbuf[MAXLINE]; 948 949 /* make absolutely certain 0, 1, and 2 are in use */ 950 sprintf(wbuf, "%s... openmailer(%s)", e->e_to, m->m_name); 951 checkfd012(wbuf); 952 } 953 #endif 954 955 /* check for 8-bit available */ 956 if (bitset(EF_HAS8BIT, e->e_flags) && 957 bitnset(M_7BITS, m->m_flags) && 958 !bitset(MM_MIME8BIT, MimeMode)) 959 { 960 usrerr("554 Cannot send 8-bit data to 7-bit destination"); 961 rcode = EX_DATAERR; 962 goto give_up; 963 } 964 965 /* check for Local Person Communication -- not for mortals!!! */ 966 if (strcmp(m->m_mailer, "[LPC]") == 0) 967 { 968 mci = (MCI *) xalloc(sizeof *mci); 969 bzero((char *) mci, sizeof *mci); 970 mci->mci_in = stdin; 971 mci->mci_out = stdout; 972 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 973 mci->mci_mailer = m; 974 } 975 else if (strcmp(m->m_mailer, "[IPC]") == 0 || 976 strcmp(m->m_mailer, "[TCP]") == 0) 977 { 978 #ifdef DAEMON 979 register int i; 980 register u_short port; 981 982 if (pv[0] == NULL || pv[1] == NULL || pv[1][0] == '\0') 983 { 984 syserr("null host name for %s mailer", m->m_mailer); 985 rcode = EX_CONFIG; 986 goto give_up; 987 } 988 989 CurHostName = pv[1]; 990 curhost = hostsignature(m, pv[1], e); 991 992 if (curhost == NULL || curhost[0] == '\0') 993 { 994 syserr("null host signature for %s", pv[1]); 995 rcode = EX_CONFIG; 996 goto give_up; 997 } 998 999 if (!clever) 1000 { 1001 syserr("554 non-clever IPC"); 1002 rcode = EX_CONFIG; 1003 goto give_up; 1004 } 1005 if (pv[2] != NULL) 1006 port = atoi(pv[2]); 1007 else 1008 port = 0; 1009 tryhost: 1010 while (*curhost != '\0') 1011 { 1012 register char *p; 1013 static char hostbuf[MAXNAME]; 1014 1015 /* pull the next host from the signature */ 1016 p = strchr(curhost, ':'); 1017 if (p == NULL) 1018 p = &curhost[strlen(curhost)]; 1019 if (p == curhost) 1020 { 1021 syserr("deliver: null host name in signature"); 1022 curhost++; 1023 continue; 1024 } 1025 strncpy(hostbuf, curhost, p - curhost); 1026 hostbuf[p - curhost] = '\0'; 1027 if (*p != '\0') 1028 p++; 1029 curhost = p; 1030 1031 /* see if we already know that this host is fried */ 1032 CurHostName = hostbuf; 1033 mci = mci_get(hostbuf, m); 1034 if (mci->mci_state != MCIS_CLOSED) 1035 { 1036 if (tTd(11, 1)) 1037 { 1038 printf("openmailer: "); 1039 mci_dump(mci, FALSE); 1040 } 1041 CurHostName = mci->mci_host; 1042 break; 1043 } 1044 mci->mci_mailer = m; 1045 if (mci->mci_exitstat != EX_OK) 1046 continue; 1047 1048 /* try the connection */ 1049 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 1050 message("Connecting to %s (%s)...", 1051 hostbuf, m->m_name); 1052 i = makeconnection(hostbuf, port, mci, 1053 bitnset(M_SECURE_PORT, m->m_flags)); 1054 mci->mci_exitstat = i; 1055 mci->mci_errno = errno; 1056 #if NAMED_BIND 1057 mci->mci_herrno = h_errno; 1058 #endif 1059 if (i == EX_OK) 1060 { 1061 mci->mci_state = MCIS_OPENING; 1062 mci_cache(mci); 1063 if (TrafficLogFile != NULL) 1064 fprintf(TrafficLogFile, "%05d == CONNECT %s\n", 1065 getpid(), hostbuf); 1066 break; 1067 } 1068 else if (tTd(11, 1)) 1069 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 1070 i, errno); 1071 1072 /* enter status of this host */ 1073 setstat(i); 1074 1075 /* should print some message here for -v mode */ 1076 } 1077 if (mci == NULL) 1078 { 1079 syserr("deliver: no host name"); 1080 rcode = EX_OSERR; 1081 goto give_up; 1082 } 1083 mci->mci_pid = 0; 1084 #else /* no DAEMON */ 1085 syserr("554 openmailer: no IPC"); 1086 if (tTd(11, 1)) 1087 printf("openmailer: NULL\n"); 1088 rcode = EX_UNAVAILABLE; 1089 goto give_up; 1090 #endif /* DAEMON */ 1091 } 1092 else 1093 { 1094 if (TrafficLogFile != NULL) 1095 { 1096 char **av; 1097 1098 fprintf(TrafficLogFile, "%05d === EXEC", getpid()); 1099 for (av = pv; *av != NULL; av++) 1100 fprintf(TrafficLogFile, " %s", *av); 1101 fprintf(TrafficLogFile, "\n"); 1102 } 1103 1104 /* create a pipe to shove the mail through */ 1105 if (pipe(mpvect) < 0) 1106 { 1107 syserr("%s... openmailer(%s): pipe (to mailer)", 1108 e->e_to, m->m_name); 1109 if (tTd(11, 1)) 1110 printf("openmailer: NULL\n"); 1111 rcode = EX_OSERR; 1112 goto give_up; 1113 } 1114 1115 /* if this mailer speaks smtp, create a return pipe */ 1116 if (clever && pipe(rpvect) < 0) 1117 { 1118 syserr("%s... openmailer(%s): pipe (from mailer)", 1119 e->e_to, m->m_name); 1120 (void) close(mpvect[0]); 1121 (void) close(mpvect[1]); 1122 if (tTd(11, 1)) 1123 printf("openmailer: NULL\n"); 1124 rcode = EX_OSERR; 1125 goto give_up; 1126 } 1127 1128 /* 1129 ** Actually fork the mailer process. 1130 ** DOFORK is clever about retrying. 1131 ** 1132 ** Dispose of SIGCHLD signal catchers that may be laying 1133 ** around so that endmail will get it. 1134 */ 1135 1136 if (e->e_xfp != NULL) 1137 (void) fflush(e->e_xfp); /* for debugging */ 1138 (void) fflush(stdout); 1139 # ifdef SIGCHLD 1140 (void) setsignal(SIGCHLD, SIG_DFL); 1141 # endif /* SIGCHLD */ 1142 DOFORK(FORK); 1143 /* pid is set by DOFORK */ 1144 if (pid < 0) 1145 { 1146 /* failure */ 1147 syserr("%s... openmailer(%s): cannot fork", 1148 e->e_to, m->m_name); 1149 (void) close(mpvect[0]); 1150 (void) close(mpvect[1]); 1151 if (clever) 1152 { 1153 (void) close(rpvect[0]); 1154 (void) close(rpvect[1]); 1155 } 1156 if (tTd(11, 1)) 1157 printf("openmailer: NULL\n"); 1158 rcode = EX_OSERR; 1159 goto give_up; 1160 } 1161 else if (pid == 0) 1162 { 1163 int i; 1164 int saveerrno; 1165 char **ep; 1166 char *env[MAXUSERENVIRON]; 1167 extern char **environ; 1168 extern int DtableSize; 1169 1170 /* child -- set up input & exec mailer */ 1171 (void) setsignal(SIGINT, SIG_IGN); 1172 (void) setsignal(SIGHUP, SIG_IGN); 1173 (void) setsignal(SIGTERM, SIG_DFL); 1174 1175 /* reset user and group */ 1176 if (!bitnset(M_RESTR, m->m_flags)) 1177 { 1178 if (ctladdr == NULL || ctladdr->q_uid == 0) 1179 { 1180 (void) initgroups(DefUser, DefGid); 1181 (void) setgid(DefGid); 1182 (void) setuid(DefUid); 1183 } 1184 else 1185 { 1186 (void) initgroups(ctladdr->q_ruser? 1187 ctladdr->q_ruser: ctladdr->q_user, 1188 ctladdr->q_gid); 1189 (void) setgid(ctladdr->q_gid); 1190 (void) setuid(ctladdr->q_uid); 1191 } 1192 } 1193 1194 if (tTd(11, 2)) 1195 printf("openmailer: running as r/euid=%d/%d\n", 1196 getuid(), geteuid()); 1197 1198 /* move into some "safe" directory */ 1199 if (m->m_execdir != NULL) 1200 { 1201 char *p, *q; 1202 char buf[MAXLINE]; 1203 1204 for (p = m->m_execdir; p != NULL; p = q) 1205 { 1206 q = strchr(p, ':'); 1207 if (q != NULL) 1208 *q = '\0'; 1209 expand(p, buf, &buf[sizeof buf] - 1, e); 1210 if (q != NULL) 1211 *q++ = ':'; 1212 if (tTd(11, 20)) 1213 printf("openmailer: trydir %s\n", 1214 buf); 1215 if (buf[0] != '\0' && chdir(buf) >= 0) 1216 break; 1217 } 1218 } 1219 1220 /* arrange to filter std & diag output of command */ 1221 if (clever) 1222 { 1223 (void) close(rpvect[0]); 1224 if (dup2(rpvect[1], STDOUT_FILENO) < 0) 1225 { 1226 syserr("%s... openmailer(%s): cannot dup pipe %d for stdout", 1227 e->e_to, m->m_name, rpvect[1]); 1228 _exit(EX_OSERR); 1229 } 1230 (void) close(rpvect[1]); 1231 } 1232 else if (OpMode == MD_SMTP || OpMode == MD_DAEMON || 1233 HoldErrs || DisConnected) 1234 { 1235 /* put mailer output in transcript */ 1236 if (dup2(fileno(e->e_xfp), STDOUT_FILENO) < 0) 1237 { 1238 syserr("%s... openmailer(%s): cannot dup xscript %d for stdout", 1239 e->e_to, m->m_name, 1240 fileno(e->e_xfp)); 1241 _exit(EX_OSERR); 1242 } 1243 } 1244 if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0) 1245 { 1246 syserr("%s... openmailer(%s): cannot dup stdout for stderr", 1247 e->e_to, m->m_name); 1248 _exit(EX_OSERR); 1249 } 1250 1251 /* arrange to get standard input */ 1252 (void) close(mpvect[1]); 1253 if (dup2(mpvect[0], STDIN_FILENO) < 0) 1254 { 1255 syserr("%s... openmailer(%s): cannot dup pipe %d for stdin", 1256 e->e_to, m->m_name, mpvect[0]); 1257 _exit(EX_OSERR); 1258 } 1259 (void) close(mpvect[0]); 1260 1261 /* arrange for all the files to be closed */ 1262 for (i = 3; i < DtableSize; i++) 1263 { 1264 register int j; 1265 1266 if ((j = fcntl(i, F_GETFD, 0)) != -1) 1267 (void) fcntl(i, F_SETFD, j | 1); 1268 } 1269 1270 /* 1271 ** Set up the mailer environment 1272 ** TZ is timezone information. 1273 ** SYSTYPE is Apollo software sys type (required). 1274 ** ISP is Apollo hardware system type (required). 1275 */ 1276 1277 i = 0; 1278 env[i++] = "AGENT=sendmail"; 1279 for (ep = environ; *ep != NULL; ep++) 1280 { 1281 if (strncmp(*ep, "TZ=", 3) == 0 || 1282 strncmp(*ep, "ISP=", 4) == 0 || 1283 strncmp(*ep, "SYSTYPE=", 8) == 0) 1284 env[i++] = *ep; 1285 } 1286 env[i++] = NULL; 1287 1288 /* run disconnected from terminal */ 1289 (void) setsid(); 1290 1291 /* try to execute the mailer */ 1292 execve(m->m_mailer, pv, env); 1293 saveerrno = errno; 1294 syserr("Cannot exec %s", m->m_mailer); 1295 if (bitnset(M_LOCALMAILER, m->m_flags) || 1296 transienterror(saveerrno)) 1297 _exit(EX_OSERR); 1298 _exit(EX_UNAVAILABLE); 1299 } 1300 1301 /* 1302 ** Set up return value. 1303 */ 1304 1305 mci = (MCI *) xalloc(sizeof *mci); 1306 bzero((char *) mci, sizeof *mci); 1307 mci->mci_mailer = m; 1308 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 1309 mci->mci_pid = pid; 1310 (void) close(mpvect[0]); 1311 mci->mci_out = fdopen(mpvect[1], "w"); 1312 if (mci->mci_out == NULL) 1313 { 1314 syserr("deliver: cannot create mailer output channel, fd=%d", 1315 mpvect[1]); 1316 (void) close(mpvect[1]); 1317 if (clever) 1318 { 1319 (void) close(rpvect[0]); 1320 (void) close(rpvect[1]); 1321 } 1322 rcode = EX_OSERR; 1323 goto give_up; 1324 } 1325 if (clever) 1326 { 1327 (void) close(rpvect[1]); 1328 mci->mci_in = fdopen(rpvect[0], "r"); 1329 if (mci->mci_in == NULL) 1330 { 1331 syserr("deliver: cannot create mailer input channel, fd=%d", 1332 mpvect[1]); 1333 (void) close(rpvect[0]); 1334 fclose(mci->mci_out); 1335 mci->mci_out = NULL; 1336 rcode = EX_OSERR; 1337 goto give_up; 1338 } 1339 } 1340 else 1341 { 1342 mci->mci_flags |= MCIF_TEMP; 1343 mci->mci_in = NULL; 1344 } 1345 } 1346 1347 if (bitset(EF_HAS8BIT, e->e_flags) && bitnset(M_7BITS, m->m_flags)) 1348 mci->mci_flags |= MCIF_CVT8TO7; 1349 1350 /* 1351 ** If we are in SMTP opening state, send initial protocol. 1352 */ 1353 1354 if (clever && mci->mci_state != MCIS_CLOSED) 1355 { 1356 smtpinit(m, mci, e); 1357 } 1358 if (tTd(11, 1)) 1359 { 1360 printf("openmailer: "); 1361 mci_dump(mci, FALSE); 1362 } 1363 1364 if (mci->mci_state != MCIS_OPEN) 1365 { 1366 /* couldn't open the mailer */ 1367 rcode = mci->mci_exitstat; 1368 errno = mci->mci_errno; 1369 #if NAMED_BIND 1370 h_errno = mci->mci_herrno; 1371 #endif 1372 if (rcode == EX_OK) 1373 { 1374 /* shouldn't happen */ 1375 syserr("554 deliver: rcode=%d, mci_state=%d, sig=%s", 1376 rcode, mci->mci_state, firstsig); 1377 rcode = EX_SOFTWARE; 1378 } 1379 else if (rcode == EX_TEMPFAIL && curhost != NULL && *curhost != '\0') 1380 { 1381 /* try next MX site */ 1382 goto tryhost; 1383 } 1384 } 1385 else if (!clever) 1386 { 1387 /* 1388 ** Format and send message. 1389 */ 1390 1391 putfromline(mci, e); 1392 (*e->e_puthdr)(mci, e->e_header, e); 1393 (*e->e_putbody)(mci, e, NULL); 1394 1395 /* get the exit status */ 1396 rcode = endmailer(mci, e, pv); 1397 } 1398 else 1399 #ifdef SMTP 1400 { 1401 /* 1402 ** Send the MAIL FROM: protocol 1403 */ 1404 1405 rcode = smtpmailfrom(m, mci, e); 1406 if (rcode == EX_OK) 1407 { 1408 register char *t = tobuf; 1409 register int i; 1410 1411 /* send the recipient list */ 1412 tobuf[0] = '\0'; 1413 for (to = tochain; to != NULL; to = to->q_tchain) 1414 { 1415 e->e_to = to->q_paddr; 1416 if ((i = smtprcpt(to, m, mci, e)) != EX_OK) 1417 { 1418 markfailure(e, to, i); 1419 giveresponse(i, m, mci, ctladdr, e); 1420 } 1421 else 1422 { 1423 *t++ = ','; 1424 for (p = to->q_paddr; *p; *t++ = *p++) 1425 continue; 1426 *t = '\0'; 1427 } 1428 } 1429 1430 /* now send the data */ 1431 if (tobuf[0] == '\0') 1432 { 1433 rcode = EX_OK; 1434 e->e_to = NULL; 1435 if (bitset(MCIF_CACHED, mci->mci_flags)) 1436 smtprset(m, mci, e); 1437 } 1438 else 1439 { 1440 e->e_to = tobuf + 1; 1441 rcode = smtpdata(m, mci, e); 1442 } 1443 1444 /* now close the connection */ 1445 if (!bitset(MCIF_CACHED, mci->mci_flags)) 1446 smtpquit(m, mci, e); 1447 } 1448 if (rcode != EX_OK && curhost != NULL && *curhost != '\0') 1449 { 1450 /* try next MX site */ 1451 goto tryhost; 1452 } 1453 } 1454 #else /* not SMTP */ 1455 { 1456 syserr("554 deliver: need SMTP compiled to use clever mailer"); 1457 rcode = EX_CONFIG; 1458 goto give_up; 1459 } 1460 #endif /* SMTP */ 1461 #if NAMED_BIND 1462 if (ConfigLevel < 2) 1463 _res.options |= RES_DEFNAMES | RES_DNSRCH; /* XXX */ 1464 #endif 1465 1466 /* arrange a return receipt if requested */ 1467 if (rcode == EX_OK && e->e_receiptto != NULL && 1468 bitnset(M_LOCALMAILER, m->m_flags)) 1469 { 1470 e->e_flags |= EF_SENDRECEIPT; 1471 /* do we want to send back more info? */ 1472 } 1473 1474 /* 1475 ** Do final status disposal. 1476 ** We check for something in tobuf for the SMTP case. 1477 ** If we got a temporary failure, arrange to queue the 1478 ** addressees. 1479 */ 1480 1481 give_up: 1482 if (tobuf[0] != '\0') 1483 giveresponse(rcode, m, mci, ctladdr, e); 1484 for (to = tochain; to != NULL; to = to->q_tchain) 1485 { 1486 if (rcode != EX_OK) 1487 markfailure(e, to, rcode); 1488 else 1489 { 1490 to->q_flags |= QSENT; 1491 e->e_nsent++; 1492 if (e->e_receiptto != NULL && 1493 bitnset(M_LOCALMAILER, m->m_flags)) 1494 { 1495 fprintf(e->e_xfp, "%s... Successfully delivered\n", 1496 to->q_paddr); 1497 } 1498 } 1499 } 1500 1501 /* 1502 ** Restore state and return. 1503 */ 1504 1505 #ifdef XDEBUG 1506 { 1507 char wbuf[MAXLINE]; 1508 1509 /* make absolutely certain 0, 1, and 2 are in use */ 1510 sprintf(wbuf, "%s... end of deliver(%s)", 1511 e->e_to == NULL ? "NO-TO-LIST" : e->e_to, 1512 m->m_name); 1513 checkfd012(wbuf); 1514 } 1515 #endif 1516 1517 errno = 0; 1518 define('g', (char *) NULL, e); 1519 return (rcode); 1520 } 1521 /* 1522 ** MARKFAILURE -- mark a failure on a specific address. 1523 ** 1524 ** Parameters: 1525 ** e -- the envelope we are sending. 1526 ** q -- the address to mark. 1527 ** rcode -- the code signifying the particular failure. 1528 ** 1529 ** Returns: 1530 ** none. 1531 ** 1532 ** Side Effects: 1533 ** marks the address (and possibly the envelope) with the 1534 ** failure so that an error will be returned or 1535 ** the message will be queued, as appropriate. 1536 */ 1537 1538 markfailure(e, q, rcode) 1539 register ENVELOPE *e; 1540 register ADDRESS *q; 1541 int rcode; 1542 { 1543 char buf[MAXLINE]; 1544 1545 switch (rcode) 1546 { 1547 case EX_OK: 1548 break; 1549 1550 case EX_TEMPFAIL: 1551 case EX_IOERR: 1552 case EX_OSERR: 1553 q->q_flags |= QQUEUEUP; 1554 break; 1555 1556 default: 1557 q->q_flags |= QBADADDR; 1558 break; 1559 } 1560 } 1561 /* 1562 ** ENDMAILER -- Wait for mailer to terminate. 1563 ** 1564 ** We should never get fatal errors (e.g., segmentation 1565 ** violation), so we report those specially. For other 1566 ** errors, we choose a status message (into statmsg), 1567 ** and if it represents an error, we print it. 1568 ** 1569 ** Parameters: 1570 ** pid -- pid of mailer. 1571 ** e -- the current envelope. 1572 ** pv -- the parameter vector that invoked the mailer 1573 ** (for error messages). 1574 ** 1575 ** Returns: 1576 ** exit code of mailer. 1577 ** 1578 ** Side Effects: 1579 ** none. 1580 */ 1581 1582 endmailer(mci, e, pv) 1583 register MCI *mci; 1584 register ENVELOPE *e; 1585 char **pv; 1586 { 1587 int st; 1588 1589 /* close any connections */ 1590 if (mci->mci_in != NULL) 1591 (void) xfclose(mci->mci_in, mci->mci_mailer->m_name, "mci_in"); 1592 if (mci->mci_out != NULL) 1593 (void) xfclose(mci->mci_out, mci->mci_mailer->m_name, "mci_out"); 1594 mci->mci_in = mci->mci_out = NULL; 1595 mci->mci_state = MCIS_CLOSED; 1596 1597 /* in the IPC case there is nothing to wait for */ 1598 if (mci->mci_pid == 0) 1599 return (EX_OK); 1600 1601 /* wait for the mailer process to die and collect status */ 1602 st = waitfor(mci->mci_pid); 1603 if (st == -1) 1604 { 1605 syserr("endmailer %s: wait", pv[0]); 1606 return (EX_SOFTWARE); 1607 } 1608 1609 if (WIFEXITED(st)) 1610 { 1611 /* normal death -- return status */ 1612 return (WEXITSTATUS(st)); 1613 } 1614 1615 /* it died a horrid death */ 1616 syserr("451 mailer %s died with signal %o", 1617 mci->mci_mailer->m_name, st); 1618 1619 /* log the arguments */ 1620 if (pv != NULL && e->e_xfp != NULL) 1621 { 1622 register char **av; 1623 1624 fprintf(e->e_xfp, "Arguments:"); 1625 for (av = pv; *av != NULL; av++) 1626 fprintf(e->e_xfp, " %s", *av); 1627 fprintf(e->e_xfp, "\n"); 1628 } 1629 1630 ExitStat = EX_TEMPFAIL; 1631 return (EX_TEMPFAIL); 1632 } 1633 /* 1634 ** GIVERESPONSE -- Interpret an error response from a mailer 1635 ** 1636 ** Parameters: 1637 ** stat -- the status code from the mailer (high byte 1638 ** only; core dumps must have been taken care of 1639 ** already). 1640 ** m -- the mailer info for this mailer. 1641 ** mci -- the mailer connection info -- can be NULL if the 1642 ** response is given before the connection is made. 1643 ** ctladdr -- the controlling address for the recipient 1644 ** address(es). 1645 ** e -- the current envelope. 1646 ** 1647 ** Returns: 1648 ** none. 1649 ** 1650 ** Side Effects: 1651 ** Errors may be incremented. 1652 ** ExitStat may be set. 1653 */ 1654 1655 giveresponse(stat, m, mci, ctladdr, e) 1656 int stat; 1657 register MAILER *m; 1658 register MCI *mci; 1659 ADDRESS *ctladdr; 1660 ENVELOPE *e; 1661 { 1662 register const char *statmsg; 1663 extern char *SysExMsg[]; 1664 register int i; 1665 extern int N_SysEx; 1666 char buf[MAXLINE]; 1667 1668 /* 1669 ** Compute status message from code. 1670 */ 1671 1672 i = stat - EX__BASE; 1673 if (stat == 0) 1674 { 1675 statmsg = "250 Sent"; 1676 if (e->e_statmsg != NULL) 1677 { 1678 (void) sprintf(buf, "%s (%s)", statmsg, e->e_statmsg); 1679 statmsg = buf; 1680 } 1681 } 1682 else if (i < 0 || i > N_SysEx) 1683 { 1684 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1685 stat = EX_UNAVAILABLE; 1686 statmsg = buf; 1687 } 1688 else if (stat == EX_TEMPFAIL) 1689 { 1690 (void) strcpy(buf, SysExMsg[i] + 1); 1691 #if NAMED_BIND 1692 if (h_errno == TRY_AGAIN) 1693 statmsg = errstring(h_errno+E_DNSBASE); 1694 else 1695 #endif 1696 { 1697 if (errno != 0) 1698 statmsg = errstring(errno); 1699 else 1700 { 1701 #ifdef SMTP 1702 statmsg = SmtpError; 1703 #else /* SMTP */ 1704 statmsg = NULL; 1705 #endif /* SMTP */ 1706 } 1707 } 1708 if (statmsg != NULL && statmsg[0] != '\0') 1709 { 1710 (void) strcat(buf, ": "); 1711 (void) strcat(buf, statmsg); 1712 } 1713 statmsg = buf; 1714 } 1715 #if NAMED_BIND 1716 else if (stat == EX_NOHOST && h_errno != 0) 1717 { 1718 statmsg = errstring(h_errno + E_DNSBASE); 1719 (void) sprintf(buf, "%s (%s)", SysExMsg[i] + 1, statmsg); 1720 statmsg = buf; 1721 } 1722 #endif 1723 else 1724 { 1725 statmsg = SysExMsg[i]; 1726 if (*statmsg++ == ':') 1727 { 1728 (void) sprintf(buf, "%s: %s", statmsg, errstring(errno)); 1729 statmsg = buf; 1730 } 1731 } 1732 1733 /* 1734 ** Print the message as appropriate 1735 */ 1736 1737 if (stat == EX_OK || stat == EX_TEMPFAIL) 1738 { 1739 extern char MsgBuf[]; 1740 1741 message("%s", &statmsg[4]); 1742 if (stat == EX_TEMPFAIL && e->e_xfp != NULL) 1743 fprintf(e->e_xfp, "%s\n", &MsgBuf[4]); 1744 } 1745 else 1746 { 1747 char mbuf[8]; 1748 1749 Errors++; 1750 sprintf(mbuf, "%.3s %%s", statmsg); 1751 usrerr(mbuf, &statmsg[4]); 1752 } 1753 1754 /* 1755 ** Final cleanup. 1756 ** Log a record of the transaction. Compute the new 1757 ** ExitStat -- if we already had an error, stick with 1758 ** that. 1759 */ 1760 1761 if (LogLevel > ((stat == EX_TEMPFAIL) ? 8 : (stat == EX_OK) ? 7 : 6)) 1762 logdelivery(m, mci, &statmsg[4], ctladdr, e); 1763 1764 if (tTd(11, 2)) 1765 printf("giveresponse: stat=%d, e->e_message=%s\n", 1766 stat, e->e_message); 1767 1768 if (stat != EX_TEMPFAIL) 1769 setstat(stat); 1770 if (stat != EX_OK && (stat != EX_TEMPFAIL || e->e_message == NULL)) 1771 { 1772 if (e->e_message != NULL) 1773 free(e->e_message); 1774 e->e_message = newstr(&statmsg[4]); 1775 } 1776 errno = 0; 1777 #if NAMED_BIND 1778 h_errno = 0; 1779 #endif 1780 } 1781 /* 1782 ** LOGDELIVERY -- log the delivery in the system log 1783 ** 1784 ** Care is taken to avoid logging lines that are too long, because 1785 ** some versions of syslog have an unfortunate proclivity for core 1786 ** dumping. This is a hack, to be sure, that is at best empirical. 1787 ** 1788 ** Parameters: 1789 ** m -- the mailer info. Can be NULL for initial queue. 1790 ** mci -- the mailer connection info -- can be NULL if the 1791 ** log is occuring when no connection is active. 1792 ** stat -- the message to print for the status. 1793 ** ctladdr -- the controlling address for the to list. 1794 ** e -- the current envelope. 1795 ** 1796 ** Returns: 1797 ** none 1798 ** 1799 ** Side Effects: 1800 ** none 1801 */ 1802 1803 logdelivery(m, mci, stat, ctladdr, e) 1804 MAILER *m; 1805 register MCI *mci; 1806 char *stat; 1807 ADDRESS *ctladdr; 1808 register ENVELOPE *e; 1809 { 1810 # ifdef LOG 1811 register char *bp; 1812 register char *p; 1813 int l; 1814 char buf[512]; 1815 1816 # if (SYSLOG_BUFSIZE) >= 256 1817 bp = buf; 1818 if (ctladdr != NULL) 1819 { 1820 strcpy(bp, ", ctladdr="); 1821 strcat(bp, shortenstring(ctladdr->q_paddr, 83)); 1822 bp += strlen(bp); 1823 if (bitset(QGOODUID, ctladdr->q_flags)) 1824 { 1825 (void) sprintf(bp, " (%d/%d)", 1826 ctladdr->q_uid, ctladdr->q_gid); 1827 bp += strlen(bp); 1828 } 1829 } 1830 1831 (void) sprintf(bp, ", delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 1832 bp += strlen(bp); 1833 1834 if (m != NULL) 1835 { 1836 (void) strcpy(bp, ", mailer="); 1837 (void) strcat(bp, m->m_name); 1838 bp += strlen(bp); 1839 } 1840 1841 if (mci != NULL && mci->mci_host != NULL) 1842 { 1843 # ifdef DAEMON 1844 extern SOCKADDR CurHostAddr; 1845 # endif 1846 1847 (void) strcpy(bp, ", relay="); 1848 (void) strcat(bp, mci->mci_host); 1849 1850 # ifdef DAEMON 1851 (void) strcat(bp, " ["); 1852 (void) strcat(bp, anynet_ntoa(&CurHostAddr)); 1853 (void) strcat(bp, "]"); 1854 # endif 1855 } 1856 else if (strcmp(stat, "queued") != 0) 1857 { 1858 char *p = macvalue('h', e); 1859 1860 if (p != NULL && p[0] != '\0') 1861 { 1862 (void) strcpy(bp, ", relay="); 1863 (void) strcat(bp, p); 1864 } 1865 } 1866 bp += strlen(bp); 1867 1868 #define STATLEN (((SYSLOG_BUFSIZE) - 100) / 4) 1869 #if (STATLEN) < 63 1870 # undef STATLEN 1871 # define STATLEN 63 1872 #endif 1873 #if (STATLEN) > 203 1874 # undef STATLEN 1875 # define STATLEN 203 1876 #endif 1877 1878 if ((bp - buf) > (sizeof buf - ((STATLEN) + 20))) 1879 { 1880 /* desperation move -- truncate data */ 1881 bp = buf + sizeof buf - ((STATLEN) + 17); 1882 strcpy(bp, "..."); 1883 bp += 3; 1884 } 1885 1886 (void) strcpy(bp, ", stat="); 1887 bp += strlen(bp); 1888 1889 (void) strcpy(bp, shortenstring(stat, (STATLEN))); 1890 1891 l = SYSLOG_BUFSIZE - 100 - strlen(buf); 1892 p = e->e_to; 1893 while (strlen(p) >= l) 1894 { 1895 register char *q = strchr(p + l, ','); 1896 1897 if (q == NULL) 1898 break; 1899 syslog(LOG_INFO, "%s: to=%.*s [more]%s", 1900 e->e_id, ++q - p, p, buf); 1901 p = q; 1902 } 1903 syslog(LOG_INFO, "%s: to=%s%s", e->e_id, p, buf); 1904 1905 # else /* we have a very short log buffer size */ 1906 1907 l = SYSLOG_BUFSIZE - 85; 1908 p = e->e_to; 1909 while (strlen(p) >= l) 1910 { 1911 register char *q = strchr(p + l, ','); 1912 1913 if (q == NULL) 1914 break; 1915 syslog(LOG_INFO, "%s: to=%.*s [more]", 1916 e->e_id, ++q - p, p); 1917 p = q; 1918 } 1919 syslog(LOG_INFO, "%s: to=%s", e->e_id, p); 1920 1921 if (ctladdr != NULL) 1922 { 1923 bp = buf; 1924 strcpy(buf, "ctladdr="); 1925 bp += strlen(buf); 1926 strcpy(bp, shortenstring(ctladdr->q_paddr, 83)); 1927 bp += strlen(buf); 1928 if (bitset(QGOODUID, ctladdr->q_flags)) 1929 { 1930 (void) sprintf(bp, " (%d/%d)", 1931 ctladdr->q_uid, ctladdr->q_gid); 1932 bp += strlen(bp); 1933 } 1934 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 1935 } 1936 bp = buf; 1937 sprintf(bp, "delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 1938 bp += strlen(bp); 1939 1940 if (m != NULL) 1941 { 1942 sprintf(bp, ", mailer=%s", m->m_name); 1943 bp += strlen(bp); 1944 } 1945 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 1946 1947 buf[0] = '\0'; 1948 if (mci != NULL && mci->mci_host != NULL) 1949 { 1950 # ifdef DAEMON 1951 extern SOCKADDR CurHostAddr; 1952 # endif 1953 1954 sprintf(buf, "relay=%s", mci->mci_host); 1955 1956 # ifdef DAEMON 1957 (void) strcat(buf, " ["); 1958 (void) strcat(buf, anynet_ntoa(&CurHostAddr)); 1959 (void) strcat(buf, "]"); 1960 # endif 1961 } 1962 else if (strcmp(stat, "queued") != 0) 1963 { 1964 char *p = macvalue('h', e); 1965 1966 if (p != NULL && p[0] != '\0') 1967 sprintf(buf, "relay=%s", p); 1968 } 1969 if (buf[0] != '\0') 1970 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 1971 1972 syslog(LOG_INFO, "%s: stat=%s", e->e_id, shortenstring(stat, 63)); 1973 # endif /* short log buffer */ 1974 # endif /* LOG */ 1975 } 1976 /* 1977 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 1978 ** 1979 ** This can be made an arbitrary message separator by changing $l 1980 ** 1981 ** One of the ugliest hacks seen by human eyes is contained herein: 1982 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 1983 ** does a well-meaning programmer such as myself have to deal with 1984 ** this kind of antique garbage???? 1985 ** 1986 ** Parameters: 1987 ** mci -- the connection information. 1988 ** e -- the envelope. 1989 ** 1990 ** Returns: 1991 ** none 1992 ** 1993 ** Side Effects: 1994 ** outputs some text to fp. 1995 */ 1996 1997 putfromline(mci, e) 1998 register MCI *mci; 1999 ENVELOPE *e; 2000 { 2001 char *template = "\201l\n"; 2002 char buf[MAXLINE]; 2003 2004 if (bitnset(M_NHDR, mci->mci_mailer->m_flags)) 2005 return; 2006 2007 # ifdef UGLYUUCP 2008 if (bitnset(M_UGLYUUCP, mci->mci_mailer->m_flags)) 2009 { 2010 char *bang; 2011 char xbuf[MAXLINE]; 2012 2013 expand("\201g", buf, &buf[sizeof buf - 1], e); 2014 bang = strchr(buf, '!'); 2015 if (bang == NULL) 2016 { 2017 errno = 0; 2018 syserr("554 No ! in UUCP From address! (%s given)", buf); 2019 } 2020 else 2021 { 2022 *bang++ = '\0'; 2023 (void) sprintf(xbuf, "From %s \201d remote from %s\n", bang, buf); 2024 template = xbuf; 2025 } 2026 } 2027 # endif /* UGLYUUCP */ 2028 expand(template, buf, &buf[sizeof buf - 1], e); 2029 putline(buf, mci); 2030 } 2031 /* 2032 ** PUTBODY -- put the body of a message. 2033 ** 2034 ** Parameters: 2035 ** mci -- the connection information. 2036 ** e -- the envelope to put out. 2037 ** separator -- if non-NULL, a message separator that must 2038 ** not be permitted in the resulting message. 2039 ** 2040 ** Returns: 2041 ** none. 2042 ** 2043 ** Side Effects: 2044 ** The message is written onto fp. 2045 */ 2046 2047 putbody(mci, e, separator) 2048 register MCI *mci; 2049 register ENVELOPE *e; 2050 char *separator; 2051 { 2052 char buf[MAXLINE]; 2053 2054 /* 2055 ** Output the body of the message 2056 */ 2057 2058 if (e->e_dfp == NULL) 2059 { 2060 if (e->e_df != NULL) 2061 { 2062 e->e_dfp = fopen(e->e_df, "r"); 2063 if (e->e_dfp == NULL) 2064 syserr("putbody: Cannot open %s for %s from %s", 2065 e->e_df, e->e_to, e->e_from.q_paddr); 2066 } 2067 else 2068 { 2069 if (bitset(MCIF_INHEADER, mci->mci_flags)) 2070 { 2071 putline("", mci); 2072 mci->mci_flags &= ~MCIF_INHEADER; 2073 } 2074 putline("<<< No Message Collected >>>", mci); 2075 } 2076 } 2077 if (e->e_dfp != NULL) 2078 { 2079 rewind(e->e_dfp); 2080 2081 if (bitset(MCIF_CVT8TO7, mci->mci_flags)) 2082 { 2083 /* do 8 to 7 bit MIME conversion */ 2084 if (hvalue("MIME-Version", e->e_header) == NULL) 2085 putline("MIME-Version: 1.0", mci); 2086 mime8to7(mci, e->e_header, e, NULL); 2087 } 2088 else 2089 { 2090 /* we can pass it through unmodified */ 2091 if (bitset(MCIF_INHEADER, mci->mci_flags)) 2092 { 2093 putline("", mci); 2094 mci->mci_flags &= ~MCIF_INHEADER; 2095 } 2096 while (!ferror(mci->mci_out) && 2097 fgets(buf, sizeof buf, e->e_dfp) != NULL) 2098 { 2099 if (buf[0] == 'F' && 2100 bitnset(M_ESCFROM, mci->mci_mailer->m_flags) && 2101 strncmp(buf, "From ", 5) == 0) 2102 (void) putc('>', mci->mci_out); 2103 if (buf[0] == '-' && buf[1] == '-' && 2104 separator != NULL) 2105 { 2106 /* possible separator */ 2107 int sl = strlen(separator); 2108 2109 if (strncmp(&buf[2], separator, sl) == 0) 2110 (void) putc(' ', mci->mci_out); 2111 } 2112 putline(buf, mci); 2113 } 2114 } 2115 2116 if (ferror(e->e_dfp)) 2117 { 2118 syserr("putbody: %s: read error", e->e_df); 2119 ExitStat = EX_IOERR; 2120 } 2121 } 2122 2123 /* some mailers want extra blank line at end of message */ 2124 if (bitnset(M_BLANKEND, mci->mci_mailer->m_flags) && 2125 buf[0] != '\0' && buf[0] != '\n') 2126 putline("", mci); 2127 2128 (void) fflush(mci->mci_out); 2129 if (ferror(mci->mci_out) && errno != EPIPE) 2130 { 2131 syserr("putbody: write error"); 2132 ExitStat = EX_IOERR; 2133 } 2134 errno = 0; 2135 } 2136 /* 2137 ** MAILFILE -- Send a message to a file. 2138 ** 2139 ** If the file has the setuid/setgid bits set, but NO execute 2140 ** bits, sendmail will try to become the owner of that file 2141 ** rather than the real user. Obviously, this only works if 2142 ** sendmail runs as root. 2143 ** 2144 ** This could be done as a subordinate mailer, except that it 2145 ** is used implicitly to save messages in ~/dead.letter. We 2146 ** view this as being sufficiently important as to include it 2147 ** here. For example, if the system is dying, we shouldn't have 2148 ** to create another process plus some pipes to save the message. 2149 ** 2150 ** Parameters: 2151 ** filename -- the name of the file to send to. 2152 ** ctladdr -- the controlling address header -- includes 2153 ** the userid/groupid to be when sending. 2154 ** 2155 ** Returns: 2156 ** The exit code associated with the operation. 2157 ** 2158 ** Side Effects: 2159 ** none. 2160 */ 2161 2162 mailfile(filename, ctladdr, e) 2163 char *filename; 2164 ADDRESS *ctladdr; 2165 register ENVELOPE *e; 2166 { 2167 register FILE *f; 2168 register int pid; 2169 int mode; 2170 2171 if (tTd(11, 1)) 2172 { 2173 printf("mailfile %s\n ctladdr=", filename); 2174 printaddr(ctladdr, FALSE); 2175 } 2176 2177 if (e->e_xfp != NULL) 2178 fflush(e->e_xfp); 2179 2180 /* 2181 ** Fork so we can change permissions here. 2182 ** Note that we MUST use fork, not vfork, because of 2183 ** the complications of calling subroutines, etc. 2184 */ 2185 2186 DOFORK(fork); 2187 2188 if (pid < 0) 2189 return (EX_OSERR); 2190 else if (pid == 0) 2191 { 2192 /* child -- actually write to file */ 2193 struct stat stb; 2194 MCI mcibuf; 2195 2196 (void) setsignal(SIGINT, SIG_DFL); 2197 (void) setsignal(SIGHUP, SIG_DFL); 2198 (void) setsignal(SIGTERM, SIG_DFL); 2199 (void) umask(OldUmask); 2200 2201 if (stat(filename, &stb) < 0) 2202 stb.st_mode = FileMode; 2203 mode = stb.st_mode; 2204 2205 /* limit the errors to those actually caused in the child */ 2206 errno = 0; 2207 ExitStat = EX_OK; 2208 2209 if (bitset(0111, stb.st_mode)) 2210 exit(EX_CANTCREAT); 2211 if (ctladdr != NULL) 2212 { 2213 /* ignore setuid and setgid bits */ 2214 mode &= ~(S_ISGID|S_ISUID); 2215 } 2216 2217 /* we have to open the dfile BEFORE setuid */ 2218 if (e->e_dfp == NULL && e->e_df != NULL) 2219 { 2220 e->e_dfp = fopen(e->e_df, "r"); 2221 if (e->e_dfp == NULL) 2222 { 2223 syserr("mailfile: Cannot open %s for %s from %s", 2224 e->e_df, e->e_to, e->e_from.q_paddr); 2225 } 2226 } 2227 2228 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 2229 { 2230 if (ctladdr == NULL || ctladdr->q_uid == 0) 2231 { 2232 (void) initgroups(DefUser, DefGid); 2233 } 2234 else 2235 { 2236 (void) initgroups(ctladdr->q_ruser ? 2237 ctladdr->q_ruser : ctladdr->q_user, 2238 ctladdr->q_gid); 2239 } 2240 } 2241 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 2242 { 2243 if (ctladdr == NULL || ctladdr->q_uid == 0) 2244 (void) setuid(DefUid); 2245 else 2246 (void) setuid(ctladdr->q_uid); 2247 } 2248 FileName = filename; 2249 LineNumber = 0; 2250 f = dfopen(filename, O_WRONLY|O_CREAT|O_APPEND, FileMode); 2251 if (f == NULL) 2252 { 2253 message("554 cannot open: %s", errstring(errno)); 2254 exit(EX_CANTCREAT); 2255 } 2256 2257 bzero(&mcibuf, sizeof mcibuf); 2258 mcibuf.mci_mailer = FileMailer; 2259 mcibuf.mci_out = f; 2260 if (bitnset(M_7BITS, FileMailer->m_flags)) 2261 mcibuf.mci_flags |= MCIF_7BIT; 2262 2263 putfromline(&mcibuf, e); 2264 (*e->e_puthdr)(&mcibuf, e->e_header, e); 2265 (*e->e_putbody)(&mcibuf, e, NULL); 2266 putline("\n", &mcibuf); 2267 if (ferror(f)) 2268 { 2269 message("451 I/O error: %s", errstring(errno)); 2270 setstat(EX_IOERR); 2271 } 2272 (void) xfclose(f, "mailfile", filename); 2273 (void) fflush(stdout); 2274 2275 /* reset ISUID & ISGID bits for paranoid systems */ 2276 (void) chmod(filename, (int) stb.st_mode); 2277 exit(ExitStat); 2278 /*NOTREACHED*/ 2279 } 2280 else 2281 { 2282 /* parent -- wait for exit status */ 2283 int st; 2284 2285 st = waitfor(pid); 2286 if (WIFEXITED(st)) 2287 return (WEXITSTATUS(st)); 2288 else 2289 { 2290 syserr("child died on signal %d", st); 2291 return (EX_UNAVAILABLE); 2292 } 2293 /*NOTREACHED*/ 2294 } 2295 } 2296 /* 2297 ** HOSTSIGNATURE -- return the "signature" for a host. 2298 ** 2299 ** The signature describes how we are going to send this -- it 2300 ** can be just the hostname (for non-Internet hosts) or can be 2301 ** an ordered list of MX hosts. 2302 ** 2303 ** Parameters: 2304 ** m -- the mailer describing this host. 2305 ** host -- the host name. 2306 ** e -- the current envelope. 2307 ** 2308 ** Returns: 2309 ** The signature for this host. 2310 ** 2311 ** Side Effects: 2312 ** Can tweak the symbol table. 2313 */ 2314 2315 char * 2316 hostsignature(m, host, e) 2317 register MAILER *m; 2318 char *host; 2319 ENVELOPE *e; 2320 { 2321 register char *p; 2322 register STAB *s; 2323 int i; 2324 int len; 2325 #if NAMED_BIND 2326 int nmx; 2327 auto int rcode; 2328 char *hp; 2329 char *endp; 2330 int oldoptions; 2331 char *mxhosts[MAXMXHOSTS + 1]; 2332 #endif 2333 2334 /* 2335 ** Check to see if this uses IPC -- if not, it can't have MX records. 2336 */ 2337 2338 p = m->m_mailer; 2339 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 2340 { 2341 /* just an ordinary mailer */ 2342 return host; 2343 } 2344 2345 /* 2346 ** Look it up in the symbol table. 2347 */ 2348 2349 s = stab(host, ST_HOSTSIG, ST_ENTER); 2350 if (s->s_hostsig != NULL) 2351 return s->s_hostsig; 2352 2353 /* 2354 ** Not already there -- create a signature. 2355 */ 2356 2357 #if NAMED_BIND 2358 if (ConfigLevel < 2) 2359 { 2360 oldoptions = _res.options; 2361 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 2362 } 2363 2364 for (hp = host; hp != NULL; hp = endp) 2365 { 2366 endp = strchr(hp, ':'); 2367 if (endp != NULL) 2368 *endp = '\0'; 2369 2370 nmx = getmxrr(hp, mxhosts, TRUE, &rcode); 2371 2372 if (nmx <= 0) 2373 { 2374 register MCI *mci; 2375 2376 /* update the connection info for this host */ 2377 mci = mci_get(hp, m); 2378 mci->mci_exitstat = rcode; 2379 mci->mci_errno = errno; 2380 #if NAMED_BIND 2381 mci->mci_herrno = h_errno; 2382 #endif 2383 2384 /* and return the original host name as the signature */ 2385 nmx = 1; 2386 mxhosts[0] = hp; 2387 } 2388 2389 len = 0; 2390 for (i = 0; i < nmx; i++) 2391 { 2392 len += strlen(mxhosts[i]) + 1; 2393 } 2394 if (s->s_hostsig != NULL) 2395 len += strlen(s->s_hostsig) + 1; 2396 p = xalloc(len); 2397 if (s->s_hostsig != NULL) 2398 { 2399 (void) strcpy(p, s->s_hostsig); 2400 free(s->s_hostsig); 2401 s->s_hostsig = p; 2402 p += strlen(p); 2403 *p++ = ':'; 2404 } 2405 else 2406 s->s_hostsig = p; 2407 for (i = 0; i < nmx; i++) 2408 { 2409 if (i != 0) 2410 *p++ = ':'; 2411 strcpy(p, mxhosts[i]); 2412 p += strlen(p); 2413 } 2414 if (endp != NULL) 2415 *endp++ = ':'; 2416 } 2417 makelower(s->s_hostsig); 2418 if (ConfigLevel < 2) 2419 _res.options = oldoptions; 2420 #else 2421 /* not using BIND -- the signature is just the host name */ 2422 s->s_hostsig = host; 2423 #endif 2424 if (tTd(17, 1)) 2425 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 2426 return s->s_hostsig; 2427 } 2428