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 6.16 (Berkeley) 02/16/93"; 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 while ((p = strchr(p, '\001')) != NULL) 174 if (*++p == 'u') 175 break; 176 if (p != NULL) 177 break; 178 179 /* this entry is safe -- go ahead and process it */ 180 expand(*mvp, buf, &buf[sizeof buf - 1], e); 181 *pvp++ = newstr(buf); 182 if (pvp >= &pv[MAXPV - 3]) 183 { 184 syserr("Too many parameters to %s before $u", pv[0]); 185 return (-1); 186 } 187 } 188 189 /* 190 ** If we have no substitution for the user name in the argument 191 ** list, we know that we must supply the names otherwise -- and 192 ** SMTP is the answer!! 193 */ 194 195 if (*mvp == NULL) 196 { 197 /* running SMTP */ 198 # ifdef SMTP 199 clever = TRUE; 200 *pvp = NULL; 201 # else /* SMTP */ 202 /* oops! we don't implement SMTP */ 203 syserr("SMTP style mailer"); 204 return (EX_SOFTWARE); 205 # endif /* SMTP */ 206 } 207 208 /* 209 ** At this point *mvp points to the argument with $u. We 210 ** run through our address list and append all the addresses 211 ** we can. If we run out of space, do not fret! We can 212 ** always send another copy later. 213 */ 214 215 tobuf[0] = '\0'; 216 e->e_to = tobuf; 217 ctladdr = NULL; 218 firstsig = hostsignature(firstto->q_mailer, firstto->q_host, e); 219 for (; to != NULL; to = to->q_next) 220 { 221 /* avoid sending multiple recipients to dumb mailers */ 222 if (tobuf[0] != '\0' && !bitnset(M_MUSER, m->m_flags)) 223 break; 224 225 /* if already sent or not for this host, don't send */ 226 if (bitset(QDONTSEND, to->q_flags) || 227 to->q_mailer != firstto->q_mailer || 228 strcmp(hostsignature(to->q_mailer, to->q_host, e), firstsig) != 0) 229 continue; 230 231 /* avoid overflowing tobuf */ 232 if (sizeof tobuf < (strlen(to->q_paddr) + strlen(tobuf) + 2)) 233 break; 234 235 if (tTd(10, 1)) 236 { 237 printf("\nsend to "); 238 printaddr(to, FALSE); 239 } 240 241 /* compute effective uid/gid when sending */ 242 if (to->q_mailer == ProgMailer) 243 ctladdr = getctladdr(to); 244 245 user = to->q_user; 246 e->e_to = to->q_paddr; 247 to->q_flags |= QDONTSEND; 248 if (tTd(10, 5)) 249 { 250 printf("deliver: QDONTSEND "); 251 printaddr(to, FALSE); 252 } 253 254 /* 255 ** Check to see that these people are allowed to 256 ** talk to each other. 257 */ 258 259 if (m->m_maxsize != 0 && e->e_msgsize > m->m_maxsize) 260 { 261 NoReturn = TRUE; 262 usrerr("Message is too large; %ld bytes max", m->m_maxsize); 263 giveresponse(EX_UNAVAILABLE, m, e); 264 continue; 265 } 266 rcode = checkcompat(to, e); 267 if (rcode != EX_OK) 268 { 269 giveresponse(rcode, m, e); 270 continue; 271 } 272 273 /* 274 ** Strip quote bits from names if the mailer is dumb 275 ** about them. 276 */ 277 278 if (bitnset(M_STRIPQ, m->m_flags)) 279 { 280 stripquotes(user); 281 stripquotes(host); 282 } 283 284 /* hack attack -- delivermail compatibility */ 285 if (m == ProgMailer && *user == '|') 286 user++; 287 288 /* 289 ** If an error message has already been given, don't 290 ** bother to send to this address. 291 ** 292 ** >>>>>>>>>> This clause assumes that the local mailer 293 ** >> NOTE >> cannot do any further aliasing; that 294 ** >>>>>>>>>> function is subsumed by sendmail. 295 */ 296 297 if (bitset(QBADADDR|QQUEUEUP, to->q_flags)) 298 continue; 299 300 /* save statistics.... */ 301 markstats(e, to); 302 303 /* 304 ** See if this user name is "special". 305 ** If the user name has a slash in it, assume that this 306 ** is a file -- send it off without further ado. Note 307 ** that this type of addresses is not processed along 308 ** with the others, so we fudge on the To person. 309 */ 310 311 if (m == FileMailer) 312 { 313 rcode = mailfile(user, getctladdr(to), e); 314 giveresponse(rcode, m, e); 315 if (rcode == EX_OK) 316 to->q_flags |= QSENT; 317 continue; 318 } 319 320 /* 321 ** Address is verified -- add this user to mailer 322 ** argv, and add it to the print list of recipients. 323 */ 324 325 /* link together the chain of recipients */ 326 to->q_tchain = tochain; 327 tochain = to; 328 329 /* create list of users for error messages */ 330 (void) strcat(tobuf, ","); 331 (void) strcat(tobuf, to->q_paddr); 332 define('u', user, e); /* to user */ 333 define('z', to->q_home, e); /* user's home */ 334 335 /* 336 ** Expand out this user into argument list. 337 */ 338 339 if (!clever) 340 { 341 expand(*mvp, buf, &buf[sizeof buf - 1], e); 342 *pvp++ = newstr(buf); 343 if (pvp >= &pv[MAXPV - 2]) 344 { 345 /* allow some space for trailing parms */ 346 break; 347 } 348 } 349 } 350 351 /* see if any addresses still exist */ 352 if (tobuf[0] == '\0') 353 { 354 define('g', (char *) NULL, e); 355 define('<', (char *) NULL, e); 356 return (0); 357 } 358 359 /* print out messages as full list */ 360 e->e_to = tobuf + 1; 361 362 /* 363 ** Fill out any parameters after the $u parameter. 364 */ 365 366 while (!clever && *++mvp != NULL) 367 { 368 expand(*mvp, buf, &buf[sizeof buf - 1], e); 369 *pvp++ = newstr(buf); 370 if (pvp >= &pv[MAXPV]) 371 syserr("deliver: pv overflow after $u for %s", pv[0]); 372 } 373 *pvp++ = NULL; 374 375 /* 376 ** Call the mailer. 377 ** The argument vector gets built, pipes 378 ** are created as necessary, and we fork & exec as 379 ** appropriate. 380 ** If we are running SMTP, we just need to clean up. 381 */ 382 383 if (ctladdr == NULL) 384 ctladdr = &e->e_from; 385 #ifdef NAMED_BIND 386 if (ConfigLevel < 2) 387 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 388 #endif 389 mci = openmailer(m, pv, ctladdr, clever, e); 390 if (mci == NULL) 391 { 392 /* catastrophic error */ 393 rcode = EX_OSERR; 394 goto give_up; 395 } 396 else if (mci->mci_state != MCIS_OPEN) 397 { 398 /* couldn't open the mailer */ 399 rcode = mci->mci_exitstat; 400 errno = mci->mci_errno; 401 if (rcode == EX_OK) 402 { 403 /* shouldn't happen */ 404 syserr("deliver: rcode=%d, mci_state=%d, sig=%s", 405 rcode, mci->mci_state, firstsig); 406 rcode = EX_SOFTWARE; 407 } 408 } 409 else if (!clever) 410 { 411 /* 412 ** Format and send message. 413 */ 414 415 putfromline(mci->mci_out, m, e); 416 (*e->e_puthdr)(mci->mci_out, m, e); 417 putline("\n", mci->mci_out, m); 418 (*e->e_putbody)(mci->mci_out, m, e); 419 420 /* get the exit status */ 421 rcode = endmailer(mci, pv[0]); 422 } 423 else 424 #ifdef SMTP 425 { 426 /* 427 ** Send the MAIL FROM: protocol 428 */ 429 430 rcode = smtpmailfrom(m, mci, e); 431 if (rcode == EX_OK) 432 { 433 register char *t = tobuf; 434 register int i; 435 436 /* send the recipient list */ 437 tobuf[0] = '\0'; 438 for (to = tochain; to != NULL; to = to->q_tchain) 439 { 440 e->e_to = to->q_paddr; 441 if ((i = smtprcpt(to, m, mci, e)) != EX_OK) 442 { 443 markfailure(e, to, i); 444 giveresponse(i, m, e); 445 } 446 else 447 { 448 *t++ = ','; 449 for (p = to->q_paddr; *p; *t++ = *p++) 450 continue; 451 } 452 } 453 454 /* now send the data */ 455 if (tobuf[0] == '\0') 456 { 457 e->e_to = NULL; 458 if (bitset(MCIF_CACHED, mci->mci_flags)) 459 smtprset(m, mci, e); 460 } 461 else 462 { 463 e->e_to = tobuf + 1; 464 rcode = smtpdata(m, mci, e); 465 } 466 467 /* now close the connection */ 468 if (!bitset(MCIF_CACHED, mci->mci_flags)) 469 smtpquit(m, mci, e); 470 } 471 } 472 #else /* not SMTP */ 473 { 474 syserr("deliver: need SMTP compiled to use clever mailer"); 475 rcode = EX_CONFIG; 476 goto give_up; 477 } 478 #endif /* SMTP */ 479 #ifdef NAMED_BIND 480 if (ConfigLevel < 2) 481 _res.options |= RES_DEFNAMES | RES_DNSRCH; /* XXX */ 482 #endif 483 484 /* arrange a return receipt if requested */ 485 if (e->e_receiptto != NULL && bitnset(M_LOCAL, m->m_flags)) 486 { 487 e->e_flags |= EF_SENDRECEIPT; 488 /* do we want to send back more info? */ 489 } 490 491 /* 492 ** Do final status disposal. 493 ** We check for something in tobuf for the SMTP case. 494 ** If we got a temporary failure, arrange to queue the 495 ** addressees. 496 */ 497 498 give_up: 499 if (tobuf[0] != '\0') 500 giveresponse(rcode, m, e); 501 for (to = tochain; to != NULL; to = to->q_tchain) 502 { 503 if (rcode != EX_OK) 504 markfailure(e, to, rcode); 505 else 506 { 507 to->q_flags |= QSENT; 508 e->e_nsent++; 509 } 510 } 511 512 /* 513 ** Restore state and return. 514 */ 515 516 errno = 0; 517 define('g', (char *) NULL, e); 518 define('<', (char *) NULL, e); 519 return (rcode); 520 } 521 /* 522 ** MARKFAILURE -- mark a failure on a specific address. 523 ** 524 ** Parameters: 525 ** e -- the envelope we are sending. 526 ** q -- the address to mark. 527 ** rcode -- the code signifying the particular failure. 528 ** 529 ** Returns: 530 ** none. 531 ** 532 ** Side Effects: 533 ** marks the address (and possibly the envelope) with the 534 ** failure so that an error will be returned or 535 ** the message will be queued, as appropriate. 536 */ 537 538 markfailure(e, q, rcode) 539 register ENVELOPE *e; 540 register ADDRESS *q; 541 int rcode; 542 { 543 if (rcode == EX_OK) 544 return; 545 else if (rcode != EX_TEMPFAIL && rcode != EX_IOERR && rcode != EX_OSERR) 546 q->q_flags |= QBADADDR; 547 else if (curtime() > e->e_ctime + TimeOut) 548 { 549 extern char *pintvl(); 550 char buf[MAXLINE]; 551 552 if (!bitset(EF_TIMEOUT, e->e_flags)) 553 { 554 (void) sprintf(buf, "Cannot send message for %s", 555 pintvl(TimeOut, FALSE)); 556 if (e->e_message != NULL) 557 free(e->e_message); 558 e->e_message = newstr(buf); 559 message(Arpa_Info, buf); 560 } 561 q->q_flags |= QBADADDR; 562 e->e_flags |= EF_TIMEOUT; 563 fprintf(e->e_xfp, "421 %s... Message timed out\n", q->q_paddr); 564 } 565 else 566 q->q_flags |= QQUEUEUP; 567 } 568 /* 569 ** DOFORK -- do a fork, retrying a couple of times on failure. 570 ** 571 ** This MUST be a macro, since after a vfork we are running 572 ** two processes on the same stack!!! 573 ** 574 ** Parameters: 575 ** none. 576 ** 577 ** Returns: 578 ** From a macro??? You've got to be kidding! 579 ** 580 ** Side Effects: 581 ** Modifies the ==> LOCAL <== variable 'pid', leaving: 582 ** pid of child in parent, zero in child. 583 ** -1 on unrecoverable error. 584 ** 585 ** Notes: 586 ** I'm awfully sorry this looks so awful. That's 587 ** vfork for you..... 588 */ 589 590 # define NFORKTRIES 5 591 592 # ifndef FORK 593 # define FORK fork 594 # endif 595 596 # define DOFORK(fORKfN) \ 597 {\ 598 register int i;\ 599 \ 600 for (i = NFORKTRIES; --i >= 0; )\ 601 {\ 602 pid = fORKfN();\ 603 if (pid >= 0)\ 604 break;\ 605 if (i > 0)\ 606 sleep((unsigned) NFORKTRIES - i);\ 607 }\ 608 } 609 /* 610 ** DOFORK -- simple fork interface to DOFORK. 611 ** 612 ** Parameters: 613 ** none. 614 ** 615 ** Returns: 616 ** pid of child in parent. 617 ** zero in child. 618 ** -1 on error. 619 ** 620 ** Side Effects: 621 ** returns twice, once in parent and once in child. 622 */ 623 624 dofork() 625 { 626 register int pid; 627 628 DOFORK(fork); 629 return (pid); 630 } 631 /* 632 ** ENDMAILER -- Wait for mailer to terminate. 633 ** 634 ** We should never get fatal errors (e.g., segmentation 635 ** violation), so we report those specially. For other 636 ** errors, we choose a status message (into statmsg), 637 ** and if it represents an error, we print it. 638 ** 639 ** Parameters: 640 ** pid -- pid of mailer. 641 ** name -- name of mailer (for error messages). 642 ** 643 ** Returns: 644 ** exit code of mailer. 645 ** 646 ** Side Effects: 647 ** none. 648 */ 649 650 endmailer(mci, name) 651 register MCI *mci; 652 char *name; 653 { 654 int st; 655 656 /* close any connections */ 657 if (mci->mci_in != NULL) 658 (void) fclose(mci->mci_in); 659 if (mci->mci_out != NULL) 660 (void) fclose(mci->mci_out); 661 mci->mci_in = mci->mci_out = NULL; 662 mci->mci_state = MCIS_CLOSED; 663 664 /* in the IPC case there is nothing to wait for */ 665 if (mci->mci_pid == 0) 666 return (EX_OK); 667 668 /* wait for the mailer process to die and collect status */ 669 st = waitfor(mci->mci_pid); 670 if (st == -1) 671 { 672 syserr("endmailer %s: wait", name); 673 return (EX_SOFTWARE); 674 } 675 676 /* see if it died a horrid death */ 677 if ((st & 0377) != 0) 678 { 679 syserr("mailer %s died with signal %o", name, st); 680 ExitStat = EX_TEMPFAIL; 681 return (EX_TEMPFAIL); 682 } 683 684 /* normal death -- return status */ 685 st = (st >> 8) & 0377; 686 return (st); 687 } 688 /* 689 ** OPENMAILER -- open connection to mailer. 690 ** 691 ** Parameters: 692 ** m -- mailer descriptor. 693 ** pvp -- parameter vector to pass to mailer. 694 ** ctladdr -- controlling address for user. 695 ** clever -- create a full duplex connection. 696 ** 697 ** Returns: 698 ** The mail connection info struct for this connection. 699 ** NULL on failure. 700 ** 701 ** Side Effects: 702 ** creates a mailer in a subprocess. 703 */ 704 705 MCI * 706 openmailer(m, pvp, ctladdr, clever, e) 707 MAILER *m; 708 char **pvp; 709 ADDRESS *ctladdr; 710 bool clever; 711 ENVELOPE *e; 712 { 713 int pid; 714 register MCI *mci; 715 int mpvect[2]; 716 int rpvect[2]; 717 extern FILE *fdopen(); 718 719 if (tTd(11, 1)) 720 { 721 printf("openmailer:"); 722 printav(pvp); 723 } 724 errno = 0; 725 726 CurHostName = m->m_mailer; 727 728 /* 729 ** Deal with the special case of mail handled through an IPC 730 ** connection. 731 ** In this case we don't actually fork. We must be 732 ** running SMTP for this to work. We will return a 733 ** zero pid to indicate that we are running IPC. 734 ** We also handle a debug version that just talks to stdin/out. 735 */ 736 737 /* check for Local Person Communication -- not for mortals!!! */ 738 if (strcmp(m->m_mailer, "[LPC]") == 0) 739 { 740 mci = (MCI *) xalloc(sizeof *mci); 741 bzero((char *) mci, sizeof *mci); 742 mci->mci_in = stdin; 743 mci->mci_out = stdout; 744 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 745 mci->mci_mailer = m; 746 } 747 else if (strcmp(m->m_mailer, "[IPC]") == 0 || 748 strcmp(m->m_mailer, "[TCP]") == 0) 749 { 750 #ifdef DAEMON 751 register int i; 752 register u_short port; 753 char *curhost; 754 extern MCI *mci_get(); 755 extern char *hostsignature(); 756 757 CurHostName = pvp[1]; 758 curhost = hostsignature(m, pvp[1], e); 759 760 if (!clever) 761 syserr("non-clever IPC"); 762 if (pvp[2] != NULL) 763 port = atoi(pvp[2]); 764 else 765 port = 0; 766 while (*curhost != '\0') 767 { 768 register char *p; 769 char hostbuf[MAXNAME]; 770 771 /* pull the next host from the signature */ 772 p = strchr(curhost, ':'); 773 if (p == NULL) 774 p = &curhost[strlen(curhost)]; 775 strncpy(hostbuf, curhost, p - curhost); 776 hostbuf[p - curhost] = '\0'; 777 if (*p != '\0') 778 p++; 779 curhost = p; 780 781 /* see if we already know that this host is fried */ 782 CurHostName = hostbuf; 783 mci = mci_get(hostbuf, m); 784 if (mci->mci_state != MCIS_CLOSED) 785 { 786 if (tTd(11, 1)) 787 { 788 printf("openmailer: "); 789 mci_dump(mci); 790 } 791 CurHostName = mci->mci_host; 792 return mci; 793 } 794 mci->mci_mailer = m; 795 if (mci->mci_exitstat != EX_OK) 796 continue; 797 798 /* try the connection */ 799 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 800 message(Arpa_Info, "Connecting to %s (%s)...", 801 hostbuf, m->m_name); 802 i = makeconnection(hostbuf, port, mci, 803 bitnset(M_SECURE_PORT, m->m_flags)); 804 mci->mci_exitstat = i; 805 mci->mci_errno = errno; 806 if (i == EX_OK) 807 { 808 mci->mci_state = MCIS_OPENING; 809 mci_cache(mci); 810 break; 811 } 812 else if (tTd(11, 1)) 813 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 814 i, errno); 815 816 817 /* enter status of this host */ 818 setstat(i); 819 } 820 mci->mci_pid = 0; 821 #else /* no DAEMON */ 822 syserr("openmailer: no IPC"); 823 if (tTd(11, 1)) 824 printf("openmailer: NULL\n"); 825 return NULL; 826 #endif /* DAEMON */ 827 } 828 else 829 { 830 /* create a pipe to shove the mail through */ 831 if (pipe(mpvect) < 0) 832 { 833 syserr("openmailer: pipe (to mailer)"); 834 if (tTd(11, 1)) 835 printf("openmailer: NULL\n"); 836 return NULL; 837 } 838 839 /* if this mailer speaks smtp, create a return pipe */ 840 if (clever && pipe(rpvect) < 0) 841 { 842 syserr("openmailer: pipe (from mailer)"); 843 (void) close(mpvect[0]); 844 (void) close(mpvect[1]); 845 if (tTd(11, 1)) 846 printf("openmailer: NULL\n"); 847 return NULL; 848 } 849 850 /* 851 ** Actually fork the mailer process. 852 ** DOFORK is clever about retrying. 853 ** 854 ** Dispose of SIGCHLD signal catchers that may be laying 855 ** around so that endmail will get it. 856 */ 857 858 if (e->e_xfp != NULL) 859 (void) fflush(e->e_xfp); /* for debugging */ 860 (void) fflush(stdout); 861 # ifdef SIGCHLD 862 (void) signal(SIGCHLD, SIG_DFL); 863 # endif /* SIGCHLD */ 864 DOFORK(FORK); 865 /* pid is set by DOFORK */ 866 if (pid < 0) 867 { 868 /* failure */ 869 syserr("openmailer: cannot fork"); 870 (void) close(mpvect[0]); 871 (void) close(mpvect[1]); 872 if (clever) 873 { 874 (void) close(rpvect[0]); 875 (void) close(rpvect[1]); 876 } 877 if (tTd(11, 1)) 878 printf("openmailer: NULL\n"); 879 return NULL; 880 } 881 else if (pid == 0) 882 { 883 int i; 884 int saveerrno; 885 char *env[2]; 886 extern int DtableSize; 887 888 /* child -- set up input & exec mailer */ 889 /* make diagnostic output be standard output */ 890 (void) signal(SIGINT, SIG_IGN); 891 (void) signal(SIGHUP, SIG_IGN); 892 (void) signal(SIGTERM, SIG_DFL); 893 894 /* arrange to filter std & diag output of command */ 895 if (clever) 896 { 897 (void) close(rpvect[0]); 898 (void) close(1); 899 (void) dup(rpvect[1]); 900 (void) close(rpvect[1]); 901 } 902 else if (OpMode == MD_SMTP || HoldErrs) 903 { 904 /* put mailer output in transcript */ 905 (void) close(1); 906 (void) dup(fileno(e->e_xfp)); 907 } 908 (void) close(2); 909 (void) dup(1); 910 911 /* arrange to get standard input */ 912 (void) close(mpvect[1]); 913 (void) close(0); 914 if (dup(mpvect[0]) < 0) 915 { 916 syserr("Cannot dup to zero!"); 917 _exit(EX_OSERR); 918 } 919 (void) close(mpvect[0]); 920 if (!bitnset(M_RESTR, m->m_flags)) 921 { 922 if (ctladdr == NULL || ctladdr->q_uid == 0) 923 { 924 (void) setgid(DefGid); 925 #ifndef SYSTEM5 926 (void) initgroups(DefUser, DefGid); 927 #endif 928 (void) setuid(DefUid); 929 } 930 else 931 { 932 (void) setgid(ctladdr->q_gid); 933 #ifndef SYSTEM5 934 (void) initgroups(ctladdr->q_ruser? 935 ctladdr->q_ruser: ctladdr->q_user, 936 ctladdr->q_gid); 937 #endif 938 (void) setuid(ctladdr->q_uid); 939 } 940 } 941 942 /* arrange for all the files to be closed */ 943 for (i = 3; i < DtableSize; i++) 944 { 945 register int j; 946 if ((j = fcntl(i, F_GETFD, 0)) != -1) 947 (void)fcntl(i, F_SETFD, j|1); 948 } 949 950 /* try to execute the mailer */ 951 env[0] = "AGENT=sendmail"; 952 env[1] = NULL; 953 execve(m->m_mailer, pvp, env); 954 saveerrno = errno; 955 syserr("Cannot exec %s", m->m_mailer); 956 if (m == LocalMailer) 957 _exit(EX_TEMPFAIL); 958 switch (saveerrno) 959 { 960 case EIO: 961 case EAGAIN: 962 case ENOMEM: 963 # ifdef EPROCLIM 964 case EPROCLIM: 965 # endif 966 _exit(EX_TEMPFAIL); 967 } 968 _exit(EX_UNAVAILABLE); 969 } 970 971 /* 972 ** Set up return value. 973 */ 974 975 mci = (MCI *) xalloc(sizeof *mci); 976 bzero((char *) mci, sizeof *mci); 977 mci->mci_mailer = m; 978 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 979 mci->mci_pid = pid; 980 (void) close(mpvect[0]); 981 mci->mci_out = fdopen(mpvect[1], "w"); 982 if (clever) 983 { 984 (void) close(rpvect[1]); 985 mci->mci_in = fdopen(rpvect[0], "r"); 986 } 987 else 988 { 989 mci->mci_flags |= MCIF_TEMP; 990 mci->mci_in = NULL; 991 } 992 } 993 994 /* 995 ** If we are in SMTP opening state, send initial protocol. 996 */ 997 998 if (clever && mci->mci_state != MCIS_CLOSED) 999 { 1000 smtpinit(m, mci, e); 1001 } 1002 if (tTd(11, 1)) 1003 { 1004 printf("openmailer: "); 1005 mci_dump(mci); 1006 } 1007 1008 return mci; 1009 } 1010 /* 1011 ** GIVERESPONSE -- Interpret an error response from a mailer 1012 ** 1013 ** Parameters: 1014 ** stat -- the status code from the mailer (high byte 1015 ** only; core dumps must have been taken care of 1016 ** already). 1017 ** m -- the mailer descriptor for this mailer. 1018 ** 1019 ** Returns: 1020 ** none. 1021 ** 1022 ** Side Effects: 1023 ** Errors may be incremented. 1024 ** ExitStat may be set. 1025 */ 1026 1027 giveresponse(stat, m, e) 1028 int stat; 1029 register MAILER *m; 1030 ENVELOPE *e; 1031 { 1032 register char *statmsg; 1033 extern char *SysExMsg[]; 1034 register int i; 1035 extern int N_SysEx; 1036 #ifdef NAMED_BIND 1037 extern int h_errno; 1038 #endif 1039 char buf[MAXLINE]; 1040 1041 #ifdef lint 1042 if (m == NULL) 1043 return; 1044 #endif lint 1045 1046 /* 1047 ** Compute status message from code. 1048 */ 1049 1050 i = stat - EX__BASE; 1051 if (stat == 0) 1052 statmsg = "250 Sent"; 1053 else if (i < 0 || i > N_SysEx) 1054 { 1055 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1056 stat = EX_UNAVAILABLE; 1057 statmsg = buf; 1058 } 1059 else if (stat == EX_TEMPFAIL) 1060 { 1061 (void) strcpy(buf, SysExMsg[i]); 1062 #ifdef NAMED_BIND 1063 if (h_errno == TRY_AGAIN) 1064 { 1065 extern char *errstring(); 1066 1067 statmsg = errstring(h_errno+MAX_ERRNO); 1068 } 1069 else 1070 #endif 1071 { 1072 if (errno != 0) 1073 { 1074 extern char *errstring(); 1075 1076 statmsg = errstring(errno); 1077 } 1078 else 1079 { 1080 #ifdef SMTP 1081 extern char SmtpError[]; 1082 1083 statmsg = SmtpError; 1084 #else /* SMTP */ 1085 statmsg = NULL; 1086 #endif /* SMTP */ 1087 } 1088 } 1089 if (statmsg != NULL && statmsg[0] != '\0') 1090 { 1091 (void) strcat(buf, ": "); 1092 (void) strcat(buf, statmsg); 1093 } 1094 statmsg = buf; 1095 } 1096 else 1097 { 1098 statmsg = SysExMsg[i]; 1099 } 1100 1101 /* 1102 ** Print the message as appropriate 1103 */ 1104 1105 if (stat == EX_OK || stat == EX_TEMPFAIL) 1106 message(Arpa_Info, &statmsg[4]); 1107 else 1108 { 1109 Errors++; 1110 usrerr(statmsg); 1111 } 1112 1113 /* 1114 ** Final cleanup. 1115 ** Log a record of the transaction. Compute the new 1116 ** ExitStat -- if we already had an error, stick with 1117 ** that. 1118 */ 1119 1120 if (LogLevel > ((stat == EX_TEMPFAIL) ? 8 : (stat == EX_OK) ? 7 : 6)) 1121 logdelivery(&statmsg[4], e); 1122 1123 if (stat != EX_TEMPFAIL) 1124 setstat(stat); 1125 if (stat != EX_OK) 1126 { 1127 if (e->e_message != NULL) 1128 free(e->e_message); 1129 e->e_message = newstr(&statmsg[4]); 1130 } 1131 errno = 0; 1132 #ifdef NAMED_BIND 1133 h_errno = 0; 1134 #endif 1135 } 1136 /* 1137 ** LOGDELIVERY -- log the delivery in the system log 1138 ** 1139 ** Parameters: 1140 ** stat -- the message to print for the status 1141 ** 1142 ** Returns: 1143 ** none 1144 ** 1145 ** Side Effects: 1146 ** none 1147 */ 1148 1149 logdelivery(stat, e) 1150 char *stat; 1151 register ENVELOPE *e; 1152 { 1153 extern char *pintvl(); 1154 1155 # ifdef LOG 1156 syslog(LOG_INFO, "%s: to=%s, delay=%s, stat=%s", e->e_id, 1157 e->e_to, pintvl(curtime() - e->e_ctime, TRUE), stat); 1158 # endif /* LOG */ 1159 } 1160 /* 1161 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 1162 ** 1163 ** This can be made an arbitrary message separator by changing $l 1164 ** 1165 ** One of the ugliest hacks seen by human eyes is contained herein: 1166 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 1167 ** does a well-meaning programmer such as myself have to deal with 1168 ** this kind of antique garbage???? 1169 ** 1170 ** Parameters: 1171 ** fp -- the file to output to. 1172 ** m -- the mailer describing this entry. 1173 ** 1174 ** Returns: 1175 ** none 1176 ** 1177 ** Side Effects: 1178 ** outputs some text to fp. 1179 */ 1180 1181 putfromline(fp, m, e) 1182 register FILE *fp; 1183 register MAILER *m; 1184 ENVELOPE *e; 1185 { 1186 char *template = "\001l\n"; 1187 char buf[MAXLINE]; 1188 1189 if (bitnset(M_NHDR, m->m_flags)) 1190 return; 1191 1192 # ifdef UGLYUUCP 1193 if (bitnset(M_UGLYUUCP, m->m_flags)) 1194 { 1195 char *bang; 1196 char xbuf[MAXLINE]; 1197 1198 expand("\001<", buf, &buf[sizeof buf - 1], e); 1199 bang = strchr(buf, '!'); 1200 if (bang == NULL) 1201 syserr("No ! in UUCP! (%s)", buf); 1202 else 1203 { 1204 *bang++ = '\0'; 1205 (void) sprintf(xbuf, "From %s \001d remote from %s\n", bang, buf); 1206 template = xbuf; 1207 } 1208 } 1209 # endif /* UGLYUUCP */ 1210 expand(template, buf, &buf[sizeof buf - 1], e); 1211 putline(buf, fp, m); 1212 } 1213 /* 1214 ** PUTBODY -- put the body of a message. 1215 ** 1216 ** Parameters: 1217 ** fp -- file to output onto. 1218 ** m -- a mailer descriptor to control output format. 1219 ** e -- the envelope to put out. 1220 ** 1221 ** Returns: 1222 ** none. 1223 ** 1224 ** Side Effects: 1225 ** The message is written onto fp. 1226 */ 1227 1228 putbody(fp, m, e) 1229 FILE *fp; 1230 MAILER *m; 1231 register ENVELOPE *e; 1232 { 1233 char buf[MAXLINE]; 1234 1235 /* 1236 ** Output the body of the message 1237 */ 1238 1239 if (e->e_dfp == NULL) 1240 { 1241 if (e->e_df != NULL) 1242 { 1243 e->e_dfp = fopen(e->e_df, "r"); 1244 if (e->e_dfp == NULL) 1245 syserr("putbody: Cannot open %s for %s from %s", 1246 e->e_df, e->e_to, e->e_from); 1247 } 1248 else 1249 putline("<<< No Message Collected >>>", fp, m); 1250 } 1251 if (e->e_dfp != NULL) 1252 { 1253 rewind(e->e_dfp); 1254 while (!ferror(fp) && fgets(buf, sizeof buf, e->e_dfp) != NULL) 1255 { 1256 if (buf[0] == 'F' && bitnset(M_ESCFROM, m->m_flags) && 1257 strncmp(buf, "From ", 5) == 0) 1258 (void) putc('>', fp); 1259 putline(buf, fp, m); 1260 } 1261 1262 if (ferror(e->e_dfp)) 1263 { 1264 syserr("putbody: read error"); 1265 ExitStat = EX_IOERR; 1266 } 1267 } 1268 1269 (void) fflush(fp); 1270 if (ferror(fp) && errno != EPIPE) 1271 { 1272 syserr("putbody: write error"); 1273 ExitStat = EX_IOERR; 1274 } 1275 errno = 0; 1276 } 1277 /* 1278 ** MAILFILE -- Send a message to a file. 1279 ** 1280 ** If the file has the setuid/setgid bits set, but NO execute 1281 ** bits, sendmail will try to become the owner of that file 1282 ** rather than the real user. Obviously, this only works if 1283 ** sendmail runs as root. 1284 ** 1285 ** This could be done as a subordinate mailer, except that it 1286 ** is used implicitly to save messages in ~/dead.letter. We 1287 ** view this as being sufficiently important as to include it 1288 ** here. For example, if the system is dying, we shouldn't have 1289 ** to create another process plus some pipes to save the message. 1290 ** 1291 ** Parameters: 1292 ** filename -- the name of the file to send to. 1293 ** ctladdr -- the controlling address header -- includes 1294 ** the userid/groupid to be when sending. 1295 ** 1296 ** Returns: 1297 ** The exit code associated with the operation. 1298 ** 1299 ** Side Effects: 1300 ** none. 1301 */ 1302 1303 mailfile(filename, ctladdr, e) 1304 char *filename; 1305 ADDRESS *ctladdr; 1306 register ENVELOPE *e; 1307 { 1308 register FILE *f; 1309 register int pid; 1310 int mode; 1311 1312 /* 1313 ** Fork so we can change permissions here. 1314 ** Note that we MUST use fork, not vfork, because of 1315 ** the complications of calling subroutines, etc. 1316 */ 1317 1318 DOFORK(fork); 1319 1320 if (pid < 0) 1321 return (EX_OSERR); 1322 else if (pid == 0) 1323 { 1324 /* child -- actually write to file */ 1325 struct stat stb; 1326 1327 (void) signal(SIGINT, SIG_DFL); 1328 (void) signal(SIGHUP, SIG_DFL); 1329 (void) signal(SIGTERM, SIG_DFL); 1330 (void) umask(OldUmask); 1331 1332 if (stat(filename, &stb) < 0) 1333 stb.st_mode = 0666; 1334 mode = stb.st_mode; 1335 1336 /* limit the errors to those actually caused in the child */ 1337 errno = 0; 1338 ExitStat = EX_OK; 1339 1340 if (bitset(0111, stb.st_mode)) 1341 exit(EX_CANTCREAT); 1342 if (ctladdr == NULL) 1343 ctladdr = &e->e_from; 1344 else 1345 { 1346 /* ignore setuid and setgid bits */ 1347 mode &= ~(S_ISGID|S_ISUID); 1348 } 1349 1350 /* we have to open the dfile BEFORE setuid */ 1351 if (e->e_dfp == NULL && e->e_df != NULL) 1352 { 1353 e->e_dfp = fopen(e->e_df, "r"); 1354 if (e->e_dfp == NULL) 1355 { 1356 syserr("mailfile: Cannot open %s for %s from %s", 1357 e->e_df, e->e_to, e->e_from); 1358 } 1359 } 1360 1361 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 1362 { 1363 if (ctladdr->q_uid == 0) 1364 { 1365 (void) setgid(DefGid); 1366 #ifndef SYSTEM5 1367 (void) initgroups(DefUser, DefGid); 1368 #endif 1369 } 1370 else 1371 { 1372 (void) setgid(ctladdr->q_gid); 1373 #ifndef SYSTEM5 1374 (void) initgroups(ctladdr->q_ruser ? 1375 ctladdr->q_ruser : ctladdr->q_user, 1376 ctladdr->q_gid); 1377 #endif 1378 } 1379 } 1380 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 1381 { 1382 if (ctladdr->q_uid == 0) 1383 (void) setuid(DefUid); 1384 else 1385 (void) setuid(ctladdr->q_uid); 1386 } 1387 FileName = filename; 1388 LineNumber = 0; 1389 f = dfopen(filename, "a"); 1390 if (f == NULL) 1391 { 1392 message("cannot open"); 1393 exit(EX_CANTCREAT); 1394 } 1395 1396 putfromline(f, ProgMailer, e); 1397 (*e->e_puthdr)(f, ProgMailer, e); 1398 putline("\n", f, ProgMailer); 1399 (*e->e_putbody)(f, ProgMailer, e); 1400 putline("\n", f, ProgMailer); 1401 if (ferror(f)) 1402 { 1403 message("I/O error"); 1404 setstat(EX_IOERR); 1405 } 1406 (void) fclose(f); 1407 (void) fflush(stdout); 1408 1409 /* reset ISUID & ISGID bits for paranoid systems */ 1410 (void) chmod(filename, (int) stb.st_mode); 1411 exit(ExitStat); 1412 /*NOTREACHED*/ 1413 } 1414 else 1415 { 1416 /* parent -- wait for exit status */ 1417 int st; 1418 1419 st = waitfor(pid); 1420 if ((st & 0377) != 0) 1421 return (EX_UNAVAILABLE); 1422 else 1423 return ((st >> 8) & 0377); 1424 /*NOTREACHED*/ 1425 } 1426 } 1427 /* 1428 ** SENDALL -- actually send all the messages. 1429 ** 1430 ** Parameters: 1431 ** e -- the envelope to send. 1432 ** mode -- the delivery mode to use. If SM_DEFAULT, use 1433 ** the current SendMode. 1434 ** 1435 ** Returns: 1436 ** none. 1437 ** 1438 ** Side Effects: 1439 ** Scans the send lists and sends everything it finds. 1440 ** Delivers any appropriate error messages. 1441 ** If we are running in a non-interactive mode, takes the 1442 ** appropriate action. 1443 */ 1444 1445 sendall(e, mode) 1446 ENVELOPE *e; 1447 char mode; 1448 { 1449 register ADDRESS *q; 1450 bool oldverbose; 1451 int pid; 1452 # ifdef LOCKF 1453 struct flock lfd; 1454 # endif 1455 1456 /* determine actual delivery mode */ 1457 if (mode == SM_DEFAULT) 1458 { 1459 extern bool shouldqueue(); 1460 1461 if (shouldqueue(e->e_msgpriority, e->e_ctime)) 1462 mode = SM_QUEUE; 1463 else 1464 mode = SendMode; 1465 } 1466 1467 if (tTd(13, 1)) 1468 { 1469 printf("\nSENDALL: mode %c, sendqueue:\n", mode); 1470 printaddr(e->e_sendqueue, TRUE); 1471 } 1472 1473 /* 1474 ** Do any preprocessing necessary for the mode we are running. 1475 ** Check to make sure the hop count is reasonable. 1476 ** Delete sends to the sender in mailing lists. 1477 */ 1478 1479 CurEnv = e; 1480 1481 if (e->e_hopcount > MaxHopCount) 1482 { 1483 errno = 0; 1484 syserr("sendall: too many hops %d (%d max): from %s, to %s", 1485 e->e_hopcount, MaxHopCount, e->e_from.q_paddr, 1486 e->e_sendqueue->q_paddr); 1487 return; 1488 } 1489 1490 if (!MeToo) 1491 { 1492 extern ADDRESS *recipient(); 1493 1494 e->e_from.q_flags |= QDONTSEND; 1495 if (tTd(13, 5)) 1496 { 1497 printf("sendall: QDONTSEND "); 1498 printaddr(&e->e_from, FALSE); 1499 } 1500 (void) recipient(&e->e_from, &e->e_sendqueue, e); 1501 } 1502 1503 # ifdef QUEUE 1504 if ((mode == SM_QUEUE || mode == SM_FORK || 1505 (mode != SM_VERIFY && SuperSafe)) && 1506 !bitset(EF_INQUEUE, e->e_flags)) 1507 queueup(e, TRUE, mode == SM_QUEUE); 1508 #endif /* QUEUE */ 1509 1510 oldverbose = Verbose; 1511 switch (mode) 1512 { 1513 case SM_VERIFY: 1514 Verbose = TRUE; 1515 break; 1516 1517 case SM_QUEUE: 1518 queueonly: 1519 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 1520 return; 1521 1522 case SM_FORK: 1523 if (e->e_xfp != NULL) 1524 (void) fflush(e->e_xfp); 1525 1526 # ifdef LOCKF 1527 /* 1528 ** Since lockf has the interesting semantic that the 1529 ** lock is lost when we fork, we have to risk losing 1530 ** the lock here by closing before the fork, and then 1531 ** trying to get it back in the child. 1532 */ 1533 1534 if (e->e_lockfp != NULL) 1535 { 1536 (void) fclose(e->e_lockfp); 1537 e->e_lockfp = NULL; 1538 } 1539 # endif /* LOCKF */ 1540 1541 pid = fork(); 1542 if (pid < 0) 1543 { 1544 goto queueonly; 1545 } 1546 else if (pid > 0) 1547 { 1548 /* be sure we leave the temp files to our child */ 1549 e->e_id = e->e_df = NULL; 1550 # ifndef LOCKF 1551 if (e->e_lockfp != NULL) 1552 { 1553 (void) fclose(e->e_lockfp); 1554 e->e_lockfp = NULL; 1555 } 1556 # endif 1557 1558 /* close any random open files in the envelope */ 1559 if (e->e_dfp != NULL) 1560 { 1561 (void) fclose(e->e_dfp); 1562 e->e_dfp = NULL; 1563 } 1564 if (e->e_xfp != NULL) 1565 { 1566 (void) fclose(e->e_xfp); 1567 e->e_xfp = NULL; 1568 } 1569 return; 1570 } 1571 1572 /* double fork to avoid zombies */ 1573 if (fork() > 0) 1574 exit(EX_OK); 1575 1576 /* be sure we are immune from the terminal */ 1577 disconnect(FALSE); 1578 1579 # ifdef LOCKF 1580 /* 1581 ** Now try to get our lock back. 1582 */ 1583 1584 lfd.l_type = F_WRLCK; 1585 lfd.l_whence = lfd.l_start = lfd.l_len = 0; 1586 e->e_lockfp = fopen(queuename(e, 'q'), "r+"); 1587 if (e->e_lockfp == NULL || 1588 fcntl(fileno(e->e_lockfp), F_SETLK, &lfd) < 0) 1589 { 1590 /* oops.... lost it */ 1591 # ifdef LOG 1592 if (LogLevel > 29) 1593 syslog(LOG_NOTICE, "%s: lost lock: %m", 1594 e->e_id); 1595 # endif /* LOG */ 1596 exit(EX_OK); 1597 } 1598 # endif /* LOCKF */ 1599 1600 break; 1601 } 1602 1603 /* 1604 ** Run through the list and send everything. 1605 */ 1606 1607 e->e_nsent = 0; 1608 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1609 { 1610 if (mode == SM_VERIFY) 1611 { 1612 e->e_to = q->q_paddr; 1613 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 1614 message(Arpa_Info, "deliverable"); 1615 } 1616 else if (!bitset(QDONTSEND, q->q_flags)) 1617 { 1618 # ifdef QUEUE 1619 /* 1620 ** Checkpoint the send list every few addresses 1621 */ 1622 1623 if (e->e_nsent >= CheckpointInterval) 1624 { 1625 queueup(e, TRUE, FALSE); 1626 e->e_nsent = 0; 1627 } 1628 # endif /* QUEUE */ 1629 (void) deliver(e, q); 1630 } 1631 } 1632 Verbose = oldverbose; 1633 1634 /* 1635 ** Now run through and check for errors. 1636 */ 1637 1638 if (mode == SM_VERIFY) 1639 return; 1640 1641 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1642 { 1643 register ADDRESS *qq; 1644 1645 if (tTd(13, 3)) 1646 { 1647 printf("Checking "); 1648 printaddr(q, FALSE); 1649 } 1650 1651 /* only send errors if the message failed */ 1652 if (!bitset(QBADADDR, q->q_flags)) 1653 continue; 1654 1655 /* we have an address that failed -- find the parent */ 1656 for (qq = q; qq != NULL; qq = qq->q_alias) 1657 { 1658 char obuf[MAXNAME + 6]; 1659 extern char *aliaslookup(); 1660 1661 /* we can only have owners for local addresses */ 1662 if (!bitnset(M_LOCAL, qq->q_mailer->m_flags)) 1663 continue; 1664 1665 /* see if the owner list exists */ 1666 (void) strcpy(obuf, "owner-"); 1667 if (strncmp(qq->q_user, "owner-", 6) == 0) 1668 (void) strcat(obuf, "owner"); 1669 else 1670 (void) strcat(obuf, qq->q_user); 1671 if (!bitnset(M_USR_UPPER, qq->q_mailer->m_flags)) 1672 makelower(obuf); 1673 if (aliaslookup(obuf) == NULL) 1674 continue; 1675 1676 if (tTd(13, 4)) 1677 printf("Errors to %s\n", obuf); 1678 1679 /* owner list exists -- add it to the error queue */ 1680 sendtolist(obuf, (ADDRESS *) NULL, &e->e_errorqueue, e); 1681 1682 /* and set the return path to point to it */ 1683 e->e_returnpath = newstr(obuf); 1684 1685 ErrorMode = EM_MAIL; 1686 break; 1687 } 1688 1689 /* if we did not find an owner, send to the sender */ 1690 if (qq == NULL && bitset(QBADADDR, q->q_flags)) 1691 sendtolist(e->e_from.q_paddr, qq, &e->e_errorqueue, e); 1692 } 1693 1694 if (mode == SM_FORK) 1695 finis(); 1696 } 1697 /* 1698 ** HOSTSIGNATURE -- return the "signature" for a host. 1699 ** 1700 ** The signature describes how we are going to send this -- it 1701 ** can be just the hostname (for non-Internet hosts) or can be 1702 ** an ordered list of MX hosts. 1703 ** 1704 ** Parameters: 1705 ** m -- the mailer describing this host. 1706 ** host -- the host name. 1707 ** e -- the current envelope. 1708 ** 1709 ** Returns: 1710 ** The signature for this host. 1711 ** 1712 ** Side Effects: 1713 ** Can tweak the symbol table. 1714 */ 1715 1716 char * 1717 hostsignature(m, host, e) 1718 register MAILER *m; 1719 char *host; 1720 ENVELOPE *e; 1721 { 1722 register char *p; 1723 register STAB *s; 1724 int i; 1725 int len; 1726 #ifdef NAMED_BIND 1727 int nmx; 1728 auto int rcode; 1729 char *mxhosts[MAXMXHOSTS + 1]; 1730 static char myhostbuf[MAXNAME]; 1731 #endif 1732 1733 /* 1734 ** Check to see if this uses IPC -- if not, it can't have MX records. 1735 */ 1736 1737 p = m->m_mailer; 1738 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 1739 { 1740 /* just an ordinary mailer */ 1741 return host; 1742 } 1743 1744 /* 1745 ** If it is a numeric address, just return it. 1746 */ 1747 1748 if (host[0] == '[') 1749 return host; 1750 1751 /* 1752 ** Look it up in the symbol table. 1753 */ 1754 1755 s = stab(host, ST_HOSTSIG, ST_ENTER); 1756 if (s->s_hostsig != NULL) 1757 return s->s_hostsig; 1758 1759 /* 1760 ** Not already there -- create a signature. 1761 */ 1762 1763 #ifdef NAMED_BIND 1764 if (myhostbuf[0] == '\0') 1765 expand("\001j", myhostbuf, &myhostbuf[sizeof myhostbuf - 1], e); 1766 1767 nmx = getmxrr(host, mxhosts, myhostbuf, &rcode); 1768 if (nmx <= 0) 1769 { 1770 register MCI *mci; 1771 extern int errno; 1772 extern MCI *mci_get(); 1773 1774 /* update the connection info for this host */ 1775 mci = mci_get(host, m); 1776 mci->mci_exitstat = rcode; 1777 mci->mci_errno = errno; 1778 1779 /* and return the original host name as the signature */ 1780 s->s_hostsig = host; 1781 return host; 1782 } 1783 1784 len = 0; 1785 for (i = 0; i < nmx; i++) 1786 { 1787 len += strlen(mxhosts[i]) + 1; 1788 } 1789 s->s_hostsig = p = xalloc(len); 1790 for (i = 0; i < nmx; i++) 1791 { 1792 if (i != 0) 1793 *p++ = ':'; 1794 strcpy(p, mxhosts[i]); 1795 p += strlen(p); 1796 } 1797 makelower(s->s_hostsig); 1798 #else 1799 /* not using BIND -- the signature is just the host name */ 1800 s->s_hostsig = host; 1801 #endif 1802 if (tTd(17, 1)) 1803 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 1804 return s->s_hostsig; 1805 } 1806