1 /* 2 * Copyright (c) 1983 Eric P. Allman 3 * Copyright (c) 1988 Regents of the University of California. 4 * All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 */ 8 9 #ifndef lint 10 static char sccsid[] = "@(#)deliver.c 6.17 (Berkeley) 02/18/93"; 11 #endif /* not lint */ 12 13 #include "sendmail.h" 14 #include <sys/signal.h> 15 #include <sys/stat.h> 16 #include <netdb.h> 17 #include <fcntl.h> 18 #include <errno.h> 19 #ifdef NAMED_BIND 20 #include <arpa/nameser.h> 21 #include <resolv.h> 22 #endif 23 24 /* 25 ** DELIVER -- Deliver a message to a list of addresses. 26 ** 27 ** This routine delivers to everyone on the same host as the 28 ** user on the head of the list. It is clever about mailers 29 ** that don't handle multiple users. It is NOT guaranteed 30 ** that it will deliver to all these addresses however -- so 31 ** deliver should be called once for each address on the 32 ** list. 33 ** 34 ** Parameters: 35 ** e -- the envelope to deliver. 36 ** firstto -- head of the address list to deliver to. 37 ** 38 ** Returns: 39 ** zero -- successfully delivered. 40 ** else -- some failure, see ExitStat for more info. 41 ** 42 ** Side Effects: 43 ** The standard input is passed off to someone. 44 */ 45 46 deliver(e, firstto) 47 register ENVELOPE *e; 48 ADDRESS *firstto; 49 { 50 char *host; /* host being sent to */ 51 char *user; /* user being sent to */ 52 char **pvp; 53 register char **mvp; 54 register char *p; 55 register MAILER *m; /* mailer for this recipient */ 56 ADDRESS *ctladdr; 57 register MCI *mci; 58 register ADDRESS *to = firstto; 59 bool clever = FALSE; /* running user smtp to this mailer */ 60 ADDRESS *tochain = NULL; /* chain of users in this mailer call */ 61 int rcode; /* response code */ 62 char *from; /* pointer to from person */ 63 char *firstsig; /* signature of firstto */ 64 char *pv[MAXPV+1]; 65 char tobuf[MAXLINE-50]; /* text line of to people */ 66 char buf[MAXNAME]; 67 char tfrombuf[MAXNAME]; /* translated from person */ 68 char rpathbuf[MAXNAME]; /* translated return path */ 69 extern int checkcompat(); 70 extern ADDRESS *getctladdr(); 71 extern char *remotename(); 72 extern MCI *openmailer(); 73 extern char *hostsignature(); 74 75 errno = 0; 76 if (bitset(QDONTSEND, to->q_flags)) 77 return (0); 78 79 #ifdef NAMED_BIND 80 /* unless interactive, try twice, over a minute */ 81 if (OpMode == MD_DAEMON || OpMode == MD_SMTP) { 82 _res.retrans = 30; 83 _res.retry = 2; 84 } 85 #endif 86 87 m = to->q_mailer; 88 host = to->q_host; 89 90 if (tTd(10, 1)) 91 printf("\n--deliver, mailer=%d, host=`%s', first user=`%s'\n", 92 m->m_mno, host, to->q_user); 93 94 /* 95 ** If this mailer is expensive, and if we don't want to make 96 ** connections now, just mark these addresses and return. 97 ** This is useful if we want to batch connections to 98 ** reduce load. This will cause the messages to be 99 ** queued up, and a daemon will come along to send the 100 ** messages later. 101 ** This should be on a per-mailer basis. 102 */ 103 104 if (NoConnect && !QueueRun && bitnset(M_EXPENSIVE, m->m_flags) && 105 !Verbose) 106 { 107 for (; to != NULL; to = to->q_next) 108 { 109 if (bitset(QDONTSEND, to->q_flags) || to->q_mailer != m) 110 continue; 111 to->q_flags |= QQUEUEUP|QDONTSEND; 112 e->e_to = to->q_paddr; 113 message(Arpa_Info, "queued"); 114 if (LogLevel > 8) 115 logdelivery("queued", e); 116 } 117 e->e_to = NULL; 118 return (0); 119 } 120 121 /* 122 ** Do initial argv setup. 123 ** Insert the mailer name. Notice that $x expansion is 124 ** NOT done on the mailer name. Then, if the mailer has 125 ** a picky -f flag, we insert it as appropriate. This 126 ** code does not check for 'pv' overflow; this places a 127 ** manifest lower limit of 4 for MAXPV. 128 ** The from address rewrite is expected to make 129 ** the address relative to the other end. 130 */ 131 132 /* rewrite from address, using rewriting rules */ 133 (void) strcpy(rpathbuf, remotename(e->e_returnpath, m, TRUE, FALSE, 134 TRUE, e)); 135 if (e->e_returnpath == e->e_sender) 136 { 137 from = rpathbuf; 138 } 139 else 140 { 141 (void) strcpy(tfrombuf, remotename(e->e_sender, m, TRUE, FALSE, 142 TRUE, e)); 143 from = tfrombuf; 144 } 145 146 define('f', e->e_returnpath, e); /* raw return path */ 147 define('<', rpathbuf, e); /* translated return path */ 148 define('g', from, e); /* translated sender */ 149 define('h', host, e); /* to host */ 150 Errors = 0; 151 pvp = pv; 152 *pvp++ = m->m_argv[0]; 153 154 /* insert -f or -r flag as appropriate */ 155 if (FromFlag && (bitnset(M_FOPT, m->m_flags) || bitnset(M_ROPT, m->m_flags))) 156 { 157 if (bitnset(M_FOPT, m->m_flags)) 158 *pvp++ = "-f"; 159 else 160 *pvp++ = "-r"; 161 *pvp++ = newstr(rpathbuf); 162 } 163 164 /* 165 ** Append the other fixed parts of the argv. These run 166 ** up to the first entry containing "$u". There can only 167 ** be one of these, and there are only a few more slots 168 ** in the pv after it. 169 */ 170 171 for (mvp = m->m_argv; (p = *++mvp) != NULL; ) 172 { 173 /* can't use strchr here because of sign extension problems */ 174 while (*p != '\0') 175 { 176 if ((*p++ & 0377) == MACROEXPAND) 177 { 178 if (*p == 'u') 179 break; 180 } 181 } 182 183 if (*p != '\0') 184 break; 185 186 /* this entry is safe -- go ahead and process it */ 187 expand(*mvp, buf, &buf[sizeof buf - 1], e); 188 *pvp++ = newstr(buf); 189 if (pvp >= &pv[MAXPV - 3]) 190 { 191 syserr("Too many parameters to %s before $u", pv[0]); 192 return (-1); 193 } 194 } 195 196 /* 197 ** If we have no substitution for the user name in the argument 198 ** list, we know that we must supply the names otherwise -- and 199 ** SMTP is the answer!! 200 */ 201 202 if (*mvp == NULL) 203 { 204 /* running SMTP */ 205 # ifdef SMTP 206 clever = TRUE; 207 *pvp = NULL; 208 # else /* SMTP */ 209 /* oops! we don't implement SMTP */ 210 syserr("SMTP style mailer"); 211 return (EX_SOFTWARE); 212 # endif /* SMTP */ 213 } 214 215 /* 216 ** At this point *mvp points to the argument with $u. We 217 ** run through our address list and append all the addresses 218 ** we can. If we run out of space, do not fret! We can 219 ** always send another copy later. 220 */ 221 222 tobuf[0] = '\0'; 223 e->e_to = tobuf; 224 ctladdr = NULL; 225 firstsig = hostsignature(firstto->q_mailer, firstto->q_host, e); 226 for (; to != NULL; to = to->q_next) 227 { 228 /* avoid sending multiple recipients to dumb mailers */ 229 if (tobuf[0] != '\0' && !bitnset(M_MUSER, m->m_flags)) 230 break; 231 232 /* if already sent or not for this host, don't send */ 233 if (bitset(QDONTSEND, to->q_flags) || 234 to->q_mailer != firstto->q_mailer || 235 strcmp(hostsignature(to->q_mailer, to->q_host, e), firstsig) != 0) 236 continue; 237 238 /* avoid overflowing tobuf */ 239 if (sizeof tobuf < (strlen(to->q_paddr) + strlen(tobuf) + 2)) 240 break; 241 242 if (tTd(10, 1)) 243 { 244 printf("\nsend to "); 245 printaddr(to, FALSE); 246 } 247 248 /* compute effective uid/gid when sending */ 249 if (to->q_mailer == ProgMailer) 250 ctladdr = getctladdr(to); 251 252 user = to->q_user; 253 e->e_to = to->q_paddr; 254 to->q_flags |= QDONTSEND; 255 if (tTd(10, 5)) 256 { 257 printf("deliver: QDONTSEND "); 258 printaddr(to, FALSE); 259 } 260 261 /* 262 ** Check to see that these people are allowed to 263 ** talk to each other. 264 */ 265 266 if (m->m_maxsize != 0 && e->e_msgsize > m->m_maxsize) 267 { 268 NoReturn = TRUE; 269 usrerr("Message is too large; %ld bytes max", m->m_maxsize); 270 giveresponse(EX_UNAVAILABLE, m, e); 271 continue; 272 } 273 rcode = checkcompat(to, e); 274 if (rcode != EX_OK) 275 { 276 giveresponse(rcode, m, e); 277 continue; 278 } 279 280 /* 281 ** Strip quote bits from names if the mailer is dumb 282 ** about them. 283 */ 284 285 if (bitnset(M_STRIPQ, m->m_flags)) 286 { 287 stripquotes(user); 288 stripquotes(host); 289 } 290 291 /* hack attack -- delivermail compatibility */ 292 if (m == ProgMailer && *user == '|') 293 user++; 294 295 /* 296 ** If an error message has already been given, don't 297 ** bother to send to this address. 298 ** 299 ** >>>>>>>>>> This clause assumes that the local mailer 300 ** >> NOTE >> cannot do any further aliasing; that 301 ** >>>>>>>>>> function is subsumed by sendmail. 302 */ 303 304 if (bitset(QBADADDR|QQUEUEUP, to->q_flags)) 305 continue; 306 307 /* save statistics.... */ 308 markstats(e, to); 309 310 /* 311 ** See if this user name is "special". 312 ** If the user name has a slash in it, assume that this 313 ** is a file -- send it off without further ado. Note 314 ** that this type of addresses is not processed along 315 ** with the others, so we fudge on the To person. 316 */ 317 318 if (m == FileMailer) 319 { 320 rcode = mailfile(user, getctladdr(to), e); 321 giveresponse(rcode, m, e); 322 if (rcode == EX_OK) 323 to->q_flags |= QSENT; 324 continue; 325 } 326 327 /* 328 ** Address is verified -- add this user to mailer 329 ** argv, and add it to the print list of recipients. 330 */ 331 332 /* link together the chain of recipients */ 333 to->q_tchain = tochain; 334 tochain = to; 335 336 /* create list of users for error messages */ 337 (void) strcat(tobuf, ","); 338 (void) strcat(tobuf, to->q_paddr); 339 define('u', user, e); /* to user */ 340 define('z', to->q_home, e); /* user's home */ 341 342 /* 343 ** Expand out this user into argument list. 344 */ 345 346 if (!clever) 347 { 348 expand(*mvp, buf, &buf[sizeof buf - 1], e); 349 *pvp++ = newstr(buf); 350 if (pvp >= &pv[MAXPV - 2]) 351 { 352 /* allow some space for trailing parms */ 353 break; 354 } 355 } 356 } 357 358 /* see if any addresses still exist */ 359 if (tobuf[0] == '\0') 360 { 361 define('g', (char *) NULL, e); 362 define('<', (char *) NULL, e); 363 return (0); 364 } 365 366 /* print out messages as full list */ 367 e->e_to = tobuf + 1; 368 369 /* 370 ** Fill out any parameters after the $u parameter. 371 */ 372 373 while (!clever && *++mvp != NULL) 374 { 375 expand(*mvp, buf, &buf[sizeof buf - 1], e); 376 *pvp++ = newstr(buf); 377 if (pvp >= &pv[MAXPV]) 378 syserr("deliver: pv overflow after $u for %s", pv[0]); 379 } 380 *pvp++ = NULL; 381 382 /* 383 ** Call the mailer. 384 ** The argument vector gets built, pipes 385 ** are created as necessary, and we fork & exec as 386 ** appropriate. 387 ** If we are running SMTP, we just need to clean up. 388 */ 389 390 if (ctladdr == NULL) 391 ctladdr = &e->e_from; 392 #ifdef NAMED_BIND 393 if (ConfigLevel < 2) 394 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 395 #endif 396 mci = openmailer(m, pv, ctladdr, clever, e); 397 if (mci == NULL) 398 { 399 /* catastrophic error */ 400 rcode = EX_OSERR; 401 goto give_up; 402 } 403 else if (mci->mci_state != MCIS_OPEN) 404 { 405 /* couldn't open the mailer */ 406 rcode = mci->mci_exitstat; 407 errno = mci->mci_errno; 408 if (rcode == EX_OK) 409 { 410 /* shouldn't happen */ 411 syserr("deliver: rcode=%d, mci_state=%d, sig=%s", 412 rcode, mci->mci_state, firstsig); 413 rcode = EX_SOFTWARE; 414 } 415 } 416 else if (!clever) 417 { 418 /* 419 ** Format and send message. 420 */ 421 422 putfromline(mci->mci_out, m, e); 423 (*e->e_puthdr)(mci->mci_out, m, e); 424 putline("\n", mci->mci_out, m); 425 (*e->e_putbody)(mci->mci_out, m, e); 426 427 /* get the exit status */ 428 rcode = endmailer(mci, pv[0]); 429 } 430 else 431 #ifdef SMTP 432 { 433 /* 434 ** Send the MAIL FROM: protocol 435 */ 436 437 rcode = smtpmailfrom(m, mci, e); 438 if (rcode == EX_OK) 439 { 440 register char *t = tobuf; 441 register int i; 442 443 /* send the recipient list */ 444 tobuf[0] = '\0'; 445 for (to = tochain; to != NULL; to = to->q_tchain) 446 { 447 e->e_to = to->q_paddr; 448 if ((i = smtprcpt(to, m, mci, e)) != EX_OK) 449 { 450 markfailure(e, to, i); 451 giveresponse(i, m, e); 452 } 453 else 454 { 455 *t++ = ','; 456 for (p = to->q_paddr; *p; *t++ = *p++) 457 continue; 458 } 459 } 460 461 /* now send the data */ 462 if (tobuf[0] == '\0') 463 { 464 e->e_to = NULL; 465 if (bitset(MCIF_CACHED, mci->mci_flags)) 466 smtprset(m, mci, e); 467 } 468 else 469 { 470 e->e_to = tobuf + 1; 471 rcode = smtpdata(m, mci, e); 472 } 473 474 /* now close the connection */ 475 if (!bitset(MCIF_CACHED, mci->mci_flags)) 476 smtpquit(m, mci, e); 477 } 478 } 479 #else /* not SMTP */ 480 { 481 syserr("deliver: need SMTP compiled to use clever mailer"); 482 rcode = EX_CONFIG; 483 goto give_up; 484 } 485 #endif /* SMTP */ 486 #ifdef NAMED_BIND 487 if (ConfigLevel < 2) 488 _res.options |= RES_DEFNAMES | RES_DNSRCH; /* XXX */ 489 #endif 490 491 /* arrange a return receipt if requested */ 492 if (e->e_receiptto != NULL && bitnset(M_LOCAL, m->m_flags)) 493 { 494 e->e_flags |= EF_SENDRECEIPT; 495 /* do we want to send back more info? */ 496 } 497 498 /* 499 ** Do final status disposal. 500 ** We check for something in tobuf for the SMTP case. 501 ** If we got a temporary failure, arrange to queue the 502 ** addressees. 503 */ 504 505 give_up: 506 if (tobuf[0] != '\0') 507 giveresponse(rcode, m, e); 508 for (to = tochain; to != NULL; to = to->q_tchain) 509 { 510 if (rcode != EX_OK) 511 markfailure(e, to, rcode); 512 else 513 { 514 to->q_flags |= QSENT; 515 e->e_nsent++; 516 } 517 } 518 519 /* 520 ** Restore state and return. 521 */ 522 523 errno = 0; 524 define('g', (char *) NULL, e); 525 define('<', (char *) NULL, e); 526 return (rcode); 527 } 528 /* 529 ** MARKFAILURE -- mark a failure on a specific address. 530 ** 531 ** Parameters: 532 ** e -- the envelope we are sending. 533 ** q -- the address to mark. 534 ** rcode -- the code signifying the particular failure. 535 ** 536 ** Returns: 537 ** none. 538 ** 539 ** Side Effects: 540 ** marks the address (and possibly the envelope) with the 541 ** failure so that an error will be returned or 542 ** the message will be queued, as appropriate. 543 */ 544 545 markfailure(e, q, rcode) 546 register ENVELOPE *e; 547 register ADDRESS *q; 548 int rcode; 549 { 550 if (rcode == EX_OK) 551 return; 552 else if (rcode != EX_TEMPFAIL && rcode != EX_IOERR && rcode != EX_OSERR) 553 q->q_flags |= QBADADDR; 554 else if (curtime() > e->e_ctime + TimeOut) 555 { 556 extern char *pintvl(); 557 char buf[MAXLINE]; 558 559 if (!bitset(EF_TIMEOUT, e->e_flags)) 560 { 561 (void) sprintf(buf, "Cannot send message for %s", 562 pintvl(TimeOut, FALSE)); 563 if (e->e_message != NULL) 564 free(e->e_message); 565 e->e_message = newstr(buf); 566 message(Arpa_Info, buf); 567 } 568 q->q_flags |= QBADADDR; 569 e->e_flags |= EF_TIMEOUT; 570 fprintf(e->e_xfp, "421 %s... Message timed out\n", q->q_paddr); 571 } 572 else 573 q->q_flags |= QQUEUEUP; 574 } 575 /* 576 ** DOFORK -- do a fork, retrying a couple of times on failure. 577 ** 578 ** This MUST be a macro, since after a vfork we are running 579 ** two processes on the same stack!!! 580 ** 581 ** Parameters: 582 ** none. 583 ** 584 ** Returns: 585 ** From a macro??? You've got to be kidding! 586 ** 587 ** Side Effects: 588 ** Modifies the ==> LOCAL <== variable 'pid', leaving: 589 ** pid of child in parent, zero in child. 590 ** -1 on unrecoverable error. 591 ** 592 ** Notes: 593 ** I'm awfully sorry this looks so awful. That's 594 ** vfork for you..... 595 */ 596 597 # define NFORKTRIES 5 598 599 # ifndef FORK 600 # define FORK fork 601 # endif 602 603 # define DOFORK(fORKfN) \ 604 {\ 605 register int i;\ 606 \ 607 for (i = NFORKTRIES; --i >= 0; )\ 608 {\ 609 pid = fORKfN();\ 610 if (pid >= 0)\ 611 break;\ 612 if (i > 0)\ 613 sleep((unsigned) NFORKTRIES - i);\ 614 }\ 615 } 616 /* 617 ** DOFORK -- simple fork interface to DOFORK. 618 ** 619 ** Parameters: 620 ** none. 621 ** 622 ** Returns: 623 ** pid of child in parent. 624 ** zero in child. 625 ** -1 on error. 626 ** 627 ** Side Effects: 628 ** returns twice, once in parent and once in child. 629 */ 630 631 dofork() 632 { 633 register int pid; 634 635 DOFORK(fork); 636 return (pid); 637 } 638 /* 639 ** ENDMAILER -- Wait for mailer to terminate. 640 ** 641 ** We should never get fatal errors (e.g., segmentation 642 ** violation), so we report those specially. For other 643 ** errors, we choose a status message (into statmsg), 644 ** and if it represents an error, we print it. 645 ** 646 ** Parameters: 647 ** pid -- pid of mailer. 648 ** name -- name of mailer (for error messages). 649 ** 650 ** Returns: 651 ** exit code of mailer. 652 ** 653 ** Side Effects: 654 ** none. 655 */ 656 657 endmailer(mci, name) 658 register MCI *mci; 659 char *name; 660 { 661 int st; 662 663 /* close any connections */ 664 if (mci->mci_in != NULL) 665 (void) fclose(mci->mci_in); 666 if (mci->mci_out != NULL) 667 (void) fclose(mci->mci_out); 668 mci->mci_in = mci->mci_out = NULL; 669 mci->mci_state = MCIS_CLOSED; 670 671 /* in the IPC case there is nothing to wait for */ 672 if (mci->mci_pid == 0) 673 return (EX_OK); 674 675 /* wait for the mailer process to die and collect status */ 676 st = waitfor(mci->mci_pid); 677 if (st == -1) 678 { 679 syserr("endmailer %s: wait", name); 680 return (EX_SOFTWARE); 681 } 682 683 /* see if it died a horrid death */ 684 if ((st & 0377) != 0) 685 { 686 syserr("mailer %s died with signal %o", name, st); 687 ExitStat = EX_TEMPFAIL; 688 return (EX_TEMPFAIL); 689 } 690 691 /* normal death -- return status */ 692 st = (st >> 8) & 0377; 693 return (st); 694 } 695 /* 696 ** OPENMAILER -- open connection to mailer. 697 ** 698 ** Parameters: 699 ** m -- mailer descriptor. 700 ** pvp -- parameter vector to pass to mailer. 701 ** ctladdr -- controlling address for user. 702 ** clever -- create a full duplex connection. 703 ** 704 ** Returns: 705 ** The mail connection info struct for this connection. 706 ** NULL on failure. 707 ** 708 ** Side Effects: 709 ** creates a mailer in a subprocess. 710 */ 711 712 MCI * 713 openmailer(m, pvp, ctladdr, clever, e) 714 MAILER *m; 715 char **pvp; 716 ADDRESS *ctladdr; 717 bool clever; 718 ENVELOPE *e; 719 { 720 int pid; 721 register MCI *mci; 722 int mpvect[2]; 723 int rpvect[2]; 724 extern FILE *fdopen(); 725 726 if (tTd(11, 1)) 727 { 728 printf("openmailer:"); 729 printav(pvp); 730 } 731 errno = 0; 732 733 CurHostName = m->m_mailer; 734 735 /* 736 ** Deal with the special case of mail handled through an IPC 737 ** connection. 738 ** In this case we don't actually fork. We must be 739 ** running SMTP for this to work. We will return a 740 ** zero pid to indicate that we are running IPC. 741 ** We also handle a debug version that just talks to stdin/out. 742 */ 743 744 /* check for Local Person Communication -- not for mortals!!! */ 745 if (strcmp(m->m_mailer, "[LPC]") == 0) 746 { 747 mci = (MCI *) xalloc(sizeof *mci); 748 bzero((char *) mci, sizeof *mci); 749 mci->mci_in = stdin; 750 mci->mci_out = stdout; 751 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 752 mci->mci_mailer = m; 753 } 754 else if (strcmp(m->m_mailer, "[IPC]") == 0 || 755 strcmp(m->m_mailer, "[TCP]") == 0) 756 { 757 #ifdef DAEMON 758 register int i; 759 register u_short port; 760 char *curhost; 761 extern MCI *mci_get(); 762 extern char *hostsignature(); 763 764 CurHostName = pvp[1]; 765 curhost = hostsignature(m, pvp[1], e); 766 767 if (!clever) 768 syserr("non-clever IPC"); 769 if (pvp[2] != NULL) 770 port = atoi(pvp[2]); 771 else 772 port = 0; 773 while (*curhost != '\0') 774 { 775 register char *p; 776 char hostbuf[MAXNAME]; 777 778 /* pull the next host from the signature */ 779 p = strchr(curhost, ':'); 780 if (p == NULL) 781 p = &curhost[strlen(curhost)]; 782 strncpy(hostbuf, curhost, p - curhost); 783 hostbuf[p - curhost] = '\0'; 784 if (*p != '\0') 785 p++; 786 curhost = p; 787 788 /* see if we already know that this host is fried */ 789 CurHostName = hostbuf; 790 mci = mci_get(hostbuf, m); 791 if (mci->mci_state != MCIS_CLOSED) 792 { 793 if (tTd(11, 1)) 794 { 795 printf("openmailer: "); 796 mci_dump(mci); 797 } 798 CurHostName = mci->mci_host; 799 return mci; 800 } 801 mci->mci_mailer = m; 802 if (mci->mci_exitstat != EX_OK) 803 continue; 804 805 /* try the connection */ 806 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 807 message(Arpa_Info, "Connecting to %s (%s)...", 808 hostbuf, m->m_name); 809 i = makeconnection(hostbuf, port, mci, 810 bitnset(M_SECURE_PORT, m->m_flags)); 811 mci->mci_exitstat = i; 812 mci->mci_errno = errno; 813 if (i == EX_OK) 814 { 815 mci->mci_state = MCIS_OPENING; 816 mci_cache(mci); 817 break; 818 } 819 else if (tTd(11, 1)) 820 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 821 i, errno); 822 823 824 /* enter status of this host */ 825 setstat(i); 826 } 827 mci->mci_pid = 0; 828 #else /* no DAEMON */ 829 syserr("openmailer: no IPC"); 830 if (tTd(11, 1)) 831 printf("openmailer: NULL\n"); 832 return NULL; 833 #endif /* DAEMON */ 834 } 835 else 836 { 837 /* create a pipe to shove the mail through */ 838 if (pipe(mpvect) < 0) 839 { 840 syserr("openmailer: pipe (to mailer)"); 841 if (tTd(11, 1)) 842 printf("openmailer: NULL\n"); 843 return NULL; 844 } 845 846 /* if this mailer speaks smtp, create a return pipe */ 847 if (clever && pipe(rpvect) < 0) 848 { 849 syserr("openmailer: pipe (from mailer)"); 850 (void) close(mpvect[0]); 851 (void) close(mpvect[1]); 852 if (tTd(11, 1)) 853 printf("openmailer: NULL\n"); 854 return NULL; 855 } 856 857 /* 858 ** Actually fork the mailer process. 859 ** DOFORK is clever about retrying. 860 ** 861 ** Dispose of SIGCHLD signal catchers that may be laying 862 ** around so that endmail will get it. 863 */ 864 865 if (e->e_xfp != NULL) 866 (void) fflush(e->e_xfp); /* for debugging */ 867 (void) fflush(stdout); 868 # ifdef SIGCHLD 869 (void) signal(SIGCHLD, SIG_DFL); 870 # endif /* SIGCHLD */ 871 DOFORK(FORK); 872 /* pid is set by DOFORK */ 873 if (pid < 0) 874 { 875 /* failure */ 876 syserr("openmailer: cannot fork"); 877 (void) close(mpvect[0]); 878 (void) close(mpvect[1]); 879 if (clever) 880 { 881 (void) close(rpvect[0]); 882 (void) close(rpvect[1]); 883 } 884 if (tTd(11, 1)) 885 printf("openmailer: NULL\n"); 886 return NULL; 887 } 888 else if (pid == 0) 889 { 890 int i; 891 int saveerrno; 892 char *env[2]; 893 extern int DtableSize; 894 895 /* child -- set up input & exec mailer */ 896 /* make diagnostic output be standard output */ 897 (void) signal(SIGINT, SIG_IGN); 898 (void) signal(SIGHUP, SIG_IGN); 899 (void) signal(SIGTERM, SIG_DFL); 900 901 /* arrange to filter std & diag output of command */ 902 if (clever) 903 { 904 (void) close(rpvect[0]); 905 (void) close(1); 906 (void) dup(rpvect[1]); 907 (void) close(rpvect[1]); 908 } 909 else if (OpMode == MD_SMTP || HoldErrs) 910 { 911 /* put mailer output in transcript */ 912 (void) close(1); 913 (void) dup(fileno(e->e_xfp)); 914 } 915 (void) close(2); 916 (void) dup(1); 917 918 /* arrange to get standard input */ 919 (void) close(mpvect[1]); 920 (void) close(0); 921 if (dup(mpvect[0]) < 0) 922 { 923 syserr("Cannot dup to zero!"); 924 _exit(EX_OSERR); 925 } 926 (void) close(mpvect[0]); 927 if (!bitnset(M_RESTR, m->m_flags)) 928 { 929 if (ctladdr == NULL || ctladdr->q_uid == 0) 930 { 931 (void) setgid(DefGid); 932 #ifndef SYSTEM5 933 (void) initgroups(DefUser, DefGid); 934 #endif 935 (void) setuid(DefUid); 936 } 937 else 938 { 939 (void) setgid(ctladdr->q_gid); 940 #ifndef SYSTEM5 941 (void) initgroups(ctladdr->q_ruser? 942 ctladdr->q_ruser: ctladdr->q_user, 943 ctladdr->q_gid); 944 #endif 945 (void) setuid(ctladdr->q_uid); 946 } 947 } 948 949 /* arrange for all the files to be closed */ 950 for (i = 3; i < DtableSize; i++) 951 { 952 register int j; 953 if ((j = fcntl(i, F_GETFD, 0)) != -1) 954 (void)fcntl(i, F_SETFD, j|1); 955 } 956 957 /* try to execute the mailer */ 958 env[0] = "AGENT=sendmail"; 959 env[1] = NULL; 960 execve(m->m_mailer, pvp, env); 961 saveerrno = errno; 962 syserr("Cannot exec %s", m->m_mailer); 963 if (m == LocalMailer) 964 _exit(EX_TEMPFAIL); 965 switch (saveerrno) 966 { 967 case EIO: 968 case EAGAIN: 969 case ENOMEM: 970 # ifdef EPROCLIM 971 case EPROCLIM: 972 # endif 973 _exit(EX_TEMPFAIL); 974 } 975 _exit(EX_UNAVAILABLE); 976 } 977 978 /* 979 ** Set up return value. 980 */ 981 982 mci = (MCI *) xalloc(sizeof *mci); 983 bzero((char *) mci, sizeof *mci); 984 mci->mci_mailer = m; 985 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 986 mci->mci_pid = pid; 987 (void) close(mpvect[0]); 988 mci->mci_out = fdopen(mpvect[1], "w"); 989 if (clever) 990 { 991 (void) close(rpvect[1]); 992 mci->mci_in = fdopen(rpvect[0], "r"); 993 } 994 else 995 { 996 mci->mci_flags |= MCIF_TEMP; 997 mci->mci_in = NULL; 998 } 999 } 1000 1001 /* 1002 ** If we are in SMTP opening state, send initial protocol. 1003 */ 1004 1005 if (clever && mci->mci_state != MCIS_CLOSED) 1006 { 1007 smtpinit(m, mci, e); 1008 } 1009 if (tTd(11, 1)) 1010 { 1011 printf("openmailer: "); 1012 mci_dump(mci); 1013 } 1014 1015 return mci; 1016 } 1017 /* 1018 ** GIVERESPONSE -- Interpret an error response from a mailer 1019 ** 1020 ** Parameters: 1021 ** stat -- the status code from the mailer (high byte 1022 ** only; core dumps must have been taken care of 1023 ** already). 1024 ** m -- the mailer descriptor for this mailer. 1025 ** 1026 ** Returns: 1027 ** none. 1028 ** 1029 ** Side Effects: 1030 ** Errors may be incremented. 1031 ** ExitStat may be set. 1032 */ 1033 1034 giveresponse(stat, m, e) 1035 int stat; 1036 register MAILER *m; 1037 ENVELOPE *e; 1038 { 1039 register char *statmsg; 1040 extern char *SysExMsg[]; 1041 register int i; 1042 extern int N_SysEx; 1043 #ifdef NAMED_BIND 1044 extern int h_errno; 1045 #endif 1046 char buf[MAXLINE]; 1047 1048 #ifdef lint 1049 if (m == NULL) 1050 return; 1051 #endif lint 1052 1053 /* 1054 ** Compute status message from code. 1055 */ 1056 1057 i = stat - EX__BASE; 1058 if (stat == 0) 1059 statmsg = "250 Sent"; 1060 else if (i < 0 || i > N_SysEx) 1061 { 1062 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1063 stat = EX_UNAVAILABLE; 1064 statmsg = buf; 1065 } 1066 else if (stat == EX_TEMPFAIL) 1067 { 1068 (void) strcpy(buf, SysExMsg[i]); 1069 #ifdef NAMED_BIND 1070 if (h_errno == TRY_AGAIN) 1071 { 1072 extern char *errstring(); 1073 1074 statmsg = errstring(h_errno+MAX_ERRNO); 1075 } 1076 else 1077 #endif 1078 { 1079 if (errno != 0) 1080 { 1081 extern char *errstring(); 1082 1083 statmsg = errstring(errno); 1084 } 1085 else 1086 { 1087 #ifdef SMTP 1088 extern char SmtpError[]; 1089 1090 statmsg = SmtpError; 1091 #else /* SMTP */ 1092 statmsg = NULL; 1093 #endif /* SMTP */ 1094 } 1095 } 1096 if (statmsg != NULL && statmsg[0] != '\0') 1097 { 1098 (void) strcat(buf, ": "); 1099 (void) strcat(buf, statmsg); 1100 } 1101 statmsg = buf; 1102 } 1103 else 1104 { 1105 statmsg = SysExMsg[i]; 1106 } 1107 1108 /* 1109 ** Print the message as appropriate 1110 */ 1111 1112 if (stat == EX_OK || stat == EX_TEMPFAIL) 1113 message(Arpa_Info, &statmsg[4]); 1114 else 1115 { 1116 Errors++; 1117 usrerr(statmsg); 1118 } 1119 1120 /* 1121 ** Final cleanup. 1122 ** Log a record of the transaction. Compute the new 1123 ** ExitStat -- if we already had an error, stick with 1124 ** that. 1125 */ 1126 1127 if (LogLevel > ((stat == EX_TEMPFAIL) ? 8 : (stat == EX_OK) ? 7 : 6)) 1128 logdelivery(&statmsg[4], e); 1129 1130 if (stat != EX_TEMPFAIL) 1131 setstat(stat); 1132 if (stat != EX_OK) 1133 { 1134 if (e->e_message != NULL) 1135 free(e->e_message); 1136 e->e_message = newstr(&statmsg[4]); 1137 } 1138 errno = 0; 1139 #ifdef NAMED_BIND 1140 h_errno = 0; 1141 #endif 1142 } 1143 /* 1144 ** LOGDELIVERY -- log the delivery in the system log 1145 ** 1146 ** Parameters: 1147 ** stat -- the message to print for the status 1148 ** 1149 ** Returns: 1150 ** none 1151 ** 1152 ** Side Effects: 1153 ** none 1154 */ 1155 1156 logdelivery(stat, e) 1157 char *stat; 1158 register ENVELOPE *e; 1159 { 1160 extern char *pintvl(); 1161 1162 # ifdef LOG 1163 syslog(LOG_INFO, "%s: to=%s, delay=%s, stat=%s", e->e_id, 1164 e->e_to, pintvl(curtime() - e->e_ctime, TRUE), stat); 1165 # endif /* LOG */ 1166 } 1167 /* 1168 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 1169 ** 1170 ** This can be made an arbitrary message separator by changing $l 1171 ** 1172 ** One of the ugliest hacks seen by human eyes is contained herein: 1173 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 1174 ** does a well-meaning programmer such as myself have to deal with 1175 ** this kind of antique garbage???? 1176 ** 1177 ** Parameters: 1178 ** fp -- the file to output to. 1179 ** m -- the mailer describing this entry. 1180 ** 1181 ** Returns: 1182 ** none 1183 ** 1184 ** Side Effects: 1185 ** outputs some text to fp. 1186 */ 1187 1188 putfromline(fp, m, e) 1189 register FILE *fp; 1190 register MAILER *m; 1191 ENVELOPE *e; 1192 { 1193 char *template = "\201l\n"; 1194 char buf[MAXLINE]; 1195 1196 if (bitnset(M_NHDR, m->m_flags)) 1197 return; 1198 1199 # ifdef UGLYUUCP 1200 if (bitnset(M_UGLYUUCP, m->m_flags)) 1201 { 1202 char *bang; 1203 char xbuf[MAXLINE]; 1204 1205 expand("\201<", buf, &buf[sizeof buf - 1], e); 1206 bang = strchr(buf, '!'); 1207 if (bang == NULL) 1208 syserr("No ! in UUCP! (%s)", buf); 1209 else 1210 { 1211 *bang++ = '\0'; 1212 (void) sprintf(xbuf, "From %s \201d remote from %s\n", bang, buf); 1213 template = xbuf; 1214 } 1215 } 1216 # endif /* UGLYUUCP */ 1217 expand(template, buf, &buf[sizeof buf - 1], e); 1218 putline(buf, fp, m); 1219 } 1220 /* 1221 ** PUTBODY -- put the body of a message. 1222 ** 1223 ** Parameters: 1224 ** fp -- file to output onto. 1225 ** m -- a mailer descriptor to control output format. 1226 ** e -- the envelope to put out. 1227 ** 1228 ** Returns: 1229 ** none. 1230 ** 1231 ** Side Effects: 1232 ** The message is written onto fp. 1233 */ 1234 1235 putbody(fp, m, e) 1236 FILE *fp; 1237 MAILER *m; 1238 register ENVELOPE *e; 1239 { 1240 char buf[MAXLINE]; 1241 1242 /* 1243 ** Output the body of the message 1244 */ 1245 1246 if (e->e_dfp == NULL) 1247 { 1248 if (e->e_df != NULL) 1249 { 1250 e->e_dfp = fopen(e->e_df, "r"); 1251 if (e->e_dfp == NULL) 1252 syserr("putbody: Cannot open %s for %s from %s", 1253 e->e_df, e->e_to, e->e_from); 1254 } 1255 else 1256 putline("<<< No Message Collected >>>", fp, m); 1257 } 1258 if (e->e_dfp != NULL) 1259 { 1260 rewind(e->e_dfp); 1261 while (!ferror(fp) && fgets(buf, sizeof buf, e->e_dfp) != NULL) 1262 { 1263 if (buf[0] == 'F' && bitnset(M_ESCFROM, m->m_flags) && 1264 strncmp(buf, "From ", 5) == 0) 1265 (void) putc('>', fp); 1266 putline(buf, fp, m); 1267 } 1268 1269 if (ferror(e->e_dfp)) 1270 { 1271 syserr("putbody: read error"); 1272 ExitStat = EX_IOERR; 1273 } 1274 } 1275 1276 (void) fflush(fp); 1277 if (ferror(fp) && errno != EPIPE) 1278 { 1279 syserr("putbody: write error"); 1280 ExitStat = EX_IOERR; 1281 } 1282 errno = 0; 1283 } 1284 /* 1285 ** MAILFILE -- Send a message to a file. 1286 ** 1287 ** If the file has the setuid/setgid bits set, but NO execute 1288 ** bits, sendmail will try to become the owner of that file 1289 ** rather than the real user. Obviously, this only works if 1290 ** sendmail runs as root. 1291 ** 1292 ** This could be done as a subordinate mailer, except that it 1293 ** is used implicitly to save messages in ~/dead.letter. We 1294 ** view this as being sufficiently important as to include it 1295 ** here. For example, if the system is dying, we shouldn't have 1296 ** to create another process plus some pipes to save the message. 1297 ** 1298 ** Parameters: 1299 ** filename -- the name of the file to send to. 1300 ** ctladdr -- the controlling address header -- includes 1301 ** the userid/groupid to be when sending. 1302 ** 1303 ** Returns: 1304 ** The exit code associated with the operation. 1305 ** 1306 ** Side Effects: 1307 ** none. 1308 */ 1309 1310 mailfile(filename, ctladdr, e) 1311 char *filename; 1312 ADDRESS *ctladdr; 1313 register ENVELOPE *e; 1314 { 1315 register FILE *f; 1316 register int pid; 1317 int mode; 1318 1319 /* 1320 ** Fork so we can change permissions here. 1321 ** Note that we MUST use fork, not vfork, because of 1322 ** the complications of calling subroutines, etc. 1323 */ 1324 1325 DOFORK(fork); 1326 1327 if (pid < 0) 1328 return (EX_OSERR); 1329 else if (pid == 0) 1330 { 1331 /* child -- actually write to file */ 1332 struct stat stb; 1333 1334 (void) signal(SIGINT, SIG_DFL); 1335 (void) signal(SIGHUP, SIG_DFL); 1336 (void) signal(SIGTERM, SIG_DFL); 1337 (void) umask(OldUmask); 1338 1339 if (stat(filename, &stb) < 0) 1340 stb.st_mode = 0666; 1341 mode = stb.st_mode; 1342 1343 /* limit the errors to those actually caused in the child */ 1344 errno = 0; 1345 ExitStat = EX_OK; 1346 1347 if (bitset(0111, stb.st_mode)) 1348 exit(EX_CANTCREAT); 1349 if (ctladdr == NULL) 1350 ctladdr = &e->e_from; 1351 else 1352 { 1353 /* ignore setuid and setgid bits */ 1354 mode &= ~(S_ISGID|S_ISUID); 1355 } 1356 1357 /* we have to open the dfile BEFORE setuid */ 1358 if (e->e_dfp == NULL && e->e_df != NULL) 1359 { 1360 e->e_dfp = fopen(e->e_df, "r"); 1361 if (e->e_dfp == NULL) 1362 { 1363 syserr("mailfile: Cannot open %s for %s from %s", 1364 e->e_df, e->e_to, e->e_from); 1365 } 1366 } 1367 1368 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 1369 { 1370 if (ctladdr->q_uid == 0) 1371 { 1372 (void) setgid(DefGid); 1373 #ifndef SYSTEM5 1374 (void) initgroups(DefUser, DefGid); 1375 #endif 1376 } 1377 else 1378 { 1379 (void) setgid(ctladdr->q_gid); 1380 #ifndef SYSTEM5 1381 (void) initgroups(ctladdr->q_ruser ? 1382 ctladdr->q_ruser : ctladdr->q_user, 1383 ctladdr->q_gid); 1384 #endif 1385 } 1386 } 1387 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 1388 { 1389 if (ctladdr->q_uid == 0) 1390 (void) setuid(DefUid); 1391 else 1392 (void) setuid(ctladdr->q_uid); 1393 } 1394 FileName = filename; 1395 LineNumber = 0; 1396 f = dfopen(filename, "a"); 1397 if (f == NULL) 1398 { 1399 message("cannot open"); 1400 exit(EX_CANTCREAT); 1401 } 1402 1403 putfromline(f, ProgMailer, e); 1404 (*e->e_puthdr)(f, ProgMailer, e); 1405 putline("\n", f, ProgMailer); 1406 (*e->e_putbody)(f, ProgMailer, e); 1407 putline("\n", f, ProgMailer); 1408 if (ferror(f)) 1409 { 1410 message("I/O error"); 1411 setstat(EX_IOERR); 1412 } 1413 (void) fclose(f); 1414 (void) fflush(stdout); 1415 1416 /* reset ISUID & ISGID bits for paranoid systems */ 1417 (void) chmod(filename, (int) stb.st_mode); 1418 exit(ExitStat); 1419 /*NOTREACHED*/ 1420 } 1421 else 1422 { 1423 /* parent -- wait for exit status */ 1424 int st; 1425 1426 st = waitfor(pid); 1427 if ((st & 0377) != 0) 1428 return (EX_UNAVAILABLE); 1429 else 1430 return ((st >> 8) & 0377); 1431 /*NOTREACHED*/ 1432 } 1433 } 1434 /* 1435 ** SENDALL -- actually send all the messages. 1436 ** 1437 ** Parameters: 1438 ** e -- the envelope to send. 1439 ** mode -- the delivery mode to use. If SM_DEFAULT, use 1440 ** the current SendMode. 1441 ** 1442 ** Returns: 1443 ** none. 1444 ** 1445 ** Side Effects: 1446 ** Scans the send lists and sends everything it finds. 1447 ** Delivers any appropriate error messages. 1448 ** If we are running in a non-interactive mode, takes the 1449 ** appropriate action. 1450 */ 1451 1452 sendall(e, mode) 1453 ENVELOPE *e; 1454 char mode; 1455 { 1456 register ADDRESS *q; 1457 bool oldverbose; 1458 int pid; 1459 # ifdef LOCKF 1460 struct flock lfd; 1461 # endif 1462 1463 /* determine actual delivery mode */ 1464 if (mode == SM_DEFAULT) 1465 { 1466 extern bool shouldqueue(); 1467 1468 if (shouldqueue(e->e_msgpriority, e->e_ctime)) 1469 mode = SM_QUEUE; 1470 else 1471 mode = SendMode; 1472 } 1473 1474 if (tTd(13, 1)) 1475 { 1476 printf("\nSENDALL: mode %c, sendqueue:\n", mode); 1477 printaddr(e->e_sendqueue, TRUE); 1478 } 1479 1480 /* 1481 ** Do any preprocessing necessary for the mode we are running. 1482 ** Check to make sure the hop count is reasonable. 1483 ** Delete sends to the sender in mailing lists. 1484 */ 1485 1486 CurEnv = e; 1487 1488 if (e->e_hopcount > MaxHopCount) 1489 { 1490 errno = 0; 1491 syserr("sendall: too many hops %d (%d max): from %s, to %s", 1492 e->e_hopcount, MaxHopCount, e->e_from.q_paddr, 1493 e->e_sendqueue->q_paddr); 1494 return; 1495 } 1496 1497 if (!MeToo) 1498 { 1499 extern ADDRESS *recipient(); 1500 1501 e->e_from.q_flags |= QDONTSEND; 1502 if (tTd(13, 5)) 1503 { 1504 printf("sendall: QDONTSEND "); 1505 printaddr(&e->e_from, FALSE); 1506 } 1507 (void) recipient(&e->e_from, &e->e_sendqueue, e); 1508 } 1509 1510 # ifdef QUEUE 1511 if ((mode == SM_QUEUE || mode == SM_FORK || 1512 (mode != SM_VERIFY && SuperSafe)) && 1513 !bitset(EF_INQUEUE, e->e_flags)) 1514 queueup(e, TRUE, mode == SM_QUEUE); 1515 #endif /* QUEUE */ 1516 1517 oldverbose = Verbose; 1518 switch (mode) 1519 { 1520 case SM_VERIFY: 1521 Verbose = TRUE; 1522 break; 1523 1524 case SM_QUEUE: 1525 queueonly: 1526 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 1527 return; 1528 1529 case SM_FORK: 1530 if (e->e_xfp != NULL) 1531 (void) fflush(e->e_xfp); 1532 1533 # ifdef LOCKF 1534 /* 1535 ** Since lockf has the interesting semantic that the 1536 ** lock is lost when we fork, we have to risk losing 1537 ** the lock here by closing before the fork, and then 1538 ** trying to get it back in the child. 1539 */ 1540 1541 if (e->e_lockfp != NULL) 1542 { 1543 (void) fclose(e->e_lockfp); 1544 e->e_lockfp = NULL; 1545 } 1546 # endif /* LOCKF */ 1547 1548 pid = fork(); 1549 if (pid < 0) 1550 { 1551 goto queueonly; 1552 } 1553 else if (pid > 0) 1554 { 1555 /* be sure we leave the temp files to our child */ 1556 e->e_id = e->e_df = NULL; 1557 # ifndef LOCKF 1558 if (e->e_lockfp != NULL) 1559 { 1560 (void) fclose(e->e_lockfp); 1561 e->e_lockfp = NULL; 1562 } 1563 # endif 1564 1565 /* close any random open files in the envelope */ 1566 if (e->e_dfp != NULL) 1567 { 1568 (void) fclose(e->e_dfp); 1569 e->e_dfp = NULL; 1570 } 1571 if (e->e_xfp != NULL) 1572 { 1573 (void) fclose(e->e_xfp); 1574 e->e_xfp = NULL; 1575 } 1576 return; 1577 } 1578 1579 /* double fork to avoid zombies */ 1580 if (fork() > 0) 1581 exit(EX_OK); 1582 1583 /* be sure we are immune from the terminal */ 1584 disconnect(FALSE); 1585 1586 # ifdef LOCKF 1587 /* 1588 ** Now try to get our lock back. 1589 */ 1590 1591 lfd.l_type = F_WRLCK; 1592 lfd.l_whence = lfd.l_start = lfd.l_len = 0; 1593 e->e_lockfp = fopen(queuename(e, 'q'), "r+"); 1594 if (e->e_lockfp == NULL || 1595 fcntl(fileno(e->e_lockfp), F_SETLK, &lfd) < 0) 1596 { 1597 /* oops.... lost it */ 1598 # ifdef LOG 1599 if (LogLevel > 29) 1600 syslog(LOG_NOTICE, "%s: lost lock: %m", 1601 e->e_id); 1602 # endif /* LOG */ 1603 exit(EX_OK); 1604 } 1605 # endif /* LOCKF */ 1606 1607 break; 1608 } 1609 1610 /* 1611 ** Run through the list and send everything. 1612 */ 1613 1614 e->e_nsent = 0; 1615 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1616 { 1617 if (mode == SM_VERIFY) 1618 { 1619 e->e_to = q->q_paddr; 1620 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 1621 message(Arpa_Info, "deliverable"); 1622 } 1623 else if (!bitset(QDONTSEND, q->q_flags)) 1624 { 1625 # ifdef QUEUE 1626 /* 1627 ** Checkpoint the send list every few addresses 1628 */ 1629 1630 if (e->e_nsent >= CheckpointInterval) 1631 { 1632 queueup(e, TRUE, FALSE); 1633 e->e_nsent = 0; 1634 } 1635 # endif /* QUEUE */ 1636 (void) deliver(e, q); 1637 } 1638 } 1639 Verbose = oldverbose; 1640 1641 /* 1642 ** Now run through and check for errors. 1643 */ 1644 1645 if (mode == SM_VERIFY) 1646 return; 1647 1648 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1649 { 1650 register ADDRESS *qq; 1651 1652 if (tTd(13, 3)) 1653 { 1654 printf("Checking "); 1655 printaddr(q, FALSE); 1656 } 1657 1658 /* only send errors if the message failed */ 1659 if (!bitset(QBADADDR, q->q_flags)) 1660 continue; 1661 1662 /* we have an address that failed -- find the parent */ 1663 for (qq = q; qq != NULL; qq = qq->q_alias) 1664 { 1665 char obuf[MAXNAME + 6]; 1666 extern char *aliaslookup(); 1667 1668 /* we can only have owners for local addresses */ 1669 if (!bitnset(M_LOCAL, qq->q_mailer->m_flags)) 1670 continue; 1671 1672 /* see if the owner list exists */ 1673 (void) strcpy(obuf, "owner-"); 1674 if (strncmp(qq->q_user, "owner-", 6) == 0) 1675 (void) strcat(obuf, "owner"); 1676 else 1677 (void) strcat(obuf, qq->q_user); 1678 if (!bitnset(M_USR_UPPER, qq->q_mailer->m_flags)) 1679 makelower(obuf); 1680 if (aliaslookup(obuf) == NULL) 1681 continue; 1682 1683 if (tTd(13, 4)) 1684 printf("Errors to %s\n", obuf); 1685 1686 /* owner list exists -- add it to the error queue */ 1687 sendtolist(obuf, (ADDRESS *) NULL, &e->e_errorqueue, e); 1688 1689 /* and set the return path to point to it */ 1690 e->e_returnpath = newstr(obuf); 1691 1692 ErrorMode = EM_MAIL; 1693 break; 1694 } 1695 1696 /* if we did not find an owner, send to the sender */ 1697 if (qq == NULL && bitset(QBADADDR, q->q_flags)) 1698 sendtolist(e->e_from.q_paddr, qq, &e->e_errorqueue, e); 1699 } 1700 1701 if (mode == SM_FORK) 1702 finis(); 1703 } 1704 /* 1705 ** HOSTSIGNATURE -- return the "signature" for a host. 1706 ** 1707 ** The signature describes how we are going to send this -- it 1708 ** can be just the hostname (for non-Internet hosts) or can be 1709 ** an ordered list of MX hosts. 1710 ** 1711 ** Parameters: 1712 ** m -- the mailer describing this host. 1713 ** host -- the host name. 1714 ** e -- the current envelope. 1715 ** 1716 ** Returns: 1717 ** The signature for this host. 1718 ** 1719 ** Side Effects: 1720 ** Can tweak the symbol table. 1721 */ 1722 1723 char * 1724 hostsignature(m, host, e) 1725 register MAILER *m; 1726 char *host; 1727 ENVELOPE *e; 1728 { 1729 register char *p; 1730 register STAB *s; 1731 int i; 1732 int len; 1733 #ifdef NAMED_BIND 1734 int nmx; 1735 auto int rcode; 1736 char *mxhosts[MAXMXHOSTS + 1]; 1737 static char myhostbuf[MAXNAME]; 1738 #endif 1739 1740 /* 1741 ** Check to see if this uses IPC -- if not, it can't have MX records. 1742 */ 1743 1744 p = m->m_mailer; 1745 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 1746 { 1747 /* just an ordinary mailer */ 1748 return host; 1749 } 1750 1751 /* 1752 ** If it is a numeric address, just return it. 1753 */ 1754 1755 if (host[0] == '[') 1756 return host; 1757 1758 /* 1759 ** Look it up in the symbol table. 1760 */ 1761 1762 s = stab(host, ST_HOSTSIG, ST_ENTER); 1763 if (s->s_hostsig != NULL) 1764 return s->s_hostsig; 1765 1766 /* 1767 ** Not already there -- create a signature. 1768 */ 1769 1770 #ifdef NAMED_BIND 1771 if (myhostbuf[0] == '\0') 1772 expand("\201j", myhostbuf, &myhostbuf[sizeof myhostbuf - 1], e); 1773 1774 nmx = getmxrr(host, mxhosts, myhostbuf, &rcode); 1775 if (nmx <= 0) 1776 { 1777 register MCI *mci; 1778 extern int errno; 1779 extern MCI *mci_get(); 1780 1781 /* update the connection info for this host */ 1782 mci = mci_get(host, m); 1783 mci->mci_exitstat = rcode; 1784 mci->mci_errno = errno; 1785 1786 /* and return the original host name as the signature */ 1787 s->s_hostsig = host; 1788 return host; 1789 } 1790 1791 len = 0; 1792 for (i = 0; i < nmx; i++) 1793 { 1794 len += strlen(mxhosts[i]) + 1; 1795 } 1796 s->s_hostsig = p = xalloc(len); 1797 for (i = 0; i < nmx; i++) 1798 { 1799 if (i != 0) 1800 *p++ = ':'; 1801 strcpy(p, mxhosts[i]); 1802 p += strlen(p); 1803 } 1804 makelower(s->s_hostsig); 1805 #else 1806 /* not using BIND -- the signature is just the host name */ 1807 s->s_hostsig = host; 1808 #endif 1809 if (tTd(17, 1)) 1810 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 1811 return s->s_hostsig; 1812 } 1813