1 /* 2 * Copyright (c) 1998-2003, 2006 Sendmail, Inc. and its suppliers. 3 * All rights reserved. 4 * Copyright (c) 1983, 1995-1997 Eric P. Allman. All rights reserved. 5 * Copyright (c) 1988, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * By using this file, you agree to the terms and conditions set 9 * forth in the LICENSE file which can be found at the top level of 10 * the sendmail distribution. 11 * 12 */ 13 14 #pragma ident "%Z%%M% %I% %E% SMI" 15 16 #include <sendmail.h> 17 18 SM_RCSID("@(#)$Id: savemail.c,v 8.313 2006/11/29 00:20:41 ca Exp $") 19 20 static bool errbody __P((MCI *, ENVELOPE *, char *)); 21 static bool pruneroute __P((char *)); 22 23 /* 24 ** SAVEMAIL -- Save mail on error 25 ** 26 ** If mailing back errors, mail it back to the originator 27 ** together with an error message; otherwise, just put it in 28 ** dead.letter in the user's home directory (if he exists on 29 ** this machine). 30 ** 31 ** Parameters: 32 ** e -- the envelope containing the message in error. 33 ** sendbody -- if true, also send back the body of the 34 ** message; otherwise just send the header. 35 ** 36 ** Returns: 37 ** true if savemail panic'ed, (i.e., the data file should 38 ** be preserved by dropenvelope()) 39 ** 40 ** Side Effects: 41 ** Saves the letter, by writing or mailing it back to the 42 ** sender, or by putting it in dead.letter in her home 43 ** directory. 44 */ 45 46 /* defines for state machine */ 47 #define ESM_REPORT 0 /* report to sender's terminal */ 48 #define ESM_MAIL 1 /* mail back to sender */ 49 #define ESM_QUIET 2 /* mail has already been returned */ 50 #define ESM_DEADLETTER 3 /* save in ~/dead.letter */ 51 #define ESM_POSTMASTER 4 /* return to postmaster */ 52 #define ESM_DEADLETTERDROP 5 /* save in DeadLetterDrop */ 53 #define ESM_PANIC 6 /* call loseqfile() */ 54 #define ESM_DONE 7 /* message is successfully delivered */ 55 56 bool 57 savemail(e, sendbody) 58 register ENVELOPE *e; 59 bool sendbody; 60 { 61 register SM_FILE_T *fp; 62 bool panic = false; 63 int state; 64 auto ADDRESS *q = NULL; 65 register char *p; 66 MCI mcibuf; 67 int flags; 68 long sff; 69 char buf[MAXLINE + 1]; 70 char dlbuf[MAXPATHLEN]; 71 SM_MBDB_T user; 72 73 74 if (tTd(6, 1)) 75 { 76 sm_dprintf("\nsavemail, errormode = %c, id = %s, ExitStat = %d\n e_from=", 77 e->e_errormode, e->e_id == NULL ? "NONE" : e->e_id, 78 ExitStat); 79 printaddr(sm_debug_file(), &e->e_from, false); 80 } 81 82 if (e->e_id == NULL) 83 { 84 /* can't return a message with no id */ 85 return panic; 86 } 87 88 /* 89 ** In the unhappy event we don't know who to return the mail 90 ** to, make someone up. 91 */ 92 93 if (e->e_from.q_paddr == NULL) 94 { 95 e->e_sender = "Postmaster"; 96 if (parseaddr(e->e_sender, &e->e_from, 97 RF_COPYPARSE|RF_SENDERADDR, 98 '\0', NULL, e, false) == NULL) 99 { 100 syserr("553 5.3.5 Cannot parse Postmaster!"); 101 finis(true, true, EX_SOFTWARE); 102 } 103 } 104 e->e_to = NULL; 105 106 /* 107 ** Basic state machine. 108 ** 109 ** This machine runs through the following states: 110 ** 111 ** ESM_QUIET Errors have already been printed iff the 112 ** sender is local. 113 ** ESM_REPORT Report directly to the sender's terminal. 114 ** ESM_MAIL Mail response to the sender. 115 ** ESM_DEADLETTER Save response in ~/dead.letter. 116 ** ESM_POSTMASTER Mail response to the postmaster. 117 ** ESM_DEADLETTERDROP 118 ** If DeadLetterDrop set, save it there. 119 ** ESM_PANIC Save response anywhere possible. 120 */ 121 122 /* determine starting state */ 123 switch (e->e_errormode) 124 { 125 case EM_WRITE: 126 state = ESM_REPORT; 127 break; 128 129 case EM_BERKNET: 130 case EM_MAIL: 131 state = ESM_MAIL; 132 break; 133 134 case EM_PRINT: 135 case '\0': 136 state = ESM_QUIET; 137 break; 138 139 case EM_QUIET: 140 /* no need to return anything at all */ 141 return panic; 142 143 default: 144 syserr("554 5.3.0 savemail: bogus errormode x%x", 145 e->e_errormode); 146 state = ESM_MAIL; 147 break; 148 } 149 150 /* if this is already an error response, send to postmaster */ 151 if (bitset(EF_RESPONSE, e->e_flags)) 152 { 153 if (e->e_parent != NULL && 154 bitset(EF_RESPONSE, e->e_parent->e_flags)) 155 { 156 /* got an error sending a response -- can it */ 157 return panic; 158 } 159 state = ESM_POSTMASTER; 160 } 161 162 while (state != ESM_DONE) 163 { 164 if (tTd(6, 5)) 165 sm_dprintf(" state %d\n", state); 166 167 switch (state) 168 { 169 case ESM_QUIET: 170 if (bitnset(M_LOCALMAILER, e->e_from.q_mailer->m_flags)) 171 state = ESM_DEADLETTER; 172 else 173 state = ESM_MAIL; 174 break; 175 176 case ESM_REPORT: 177 178 /* 179 ** If the user is still logged in on the same terminal, 180 ** then write the error messages back to hir (sic). 181 */ 182 183 #if USE_TTYPATH 184 p = ttypath(); 185 #else /* USE_TTYPATH */ 186 p = NULL; 187 #endif /* USE_TTYPATH */ 188 189 if (p == NULL || sm_io_reopen(SmFtStdio, 190 SM_TIME_DEFAULT, 191 p, SM_IO_WRONLY, NULL, 192 smioout) == NULL) 193 { 194 state = ESM_MAIL; 195 break; 196 } 197 198 expand("\201n", buf, sizeof(buf), e); 199 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, 200 "\r\nMessage from %s...\r\n", buf); 201 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, 202 "Errors occurred while sending mail.\r\n"); 203 if (e->e_xfp != NULL) 204 { 205 (void) bfrewind(e->e_xfp); 206 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, 207 "Transcript follows:\r\n"); 208 while (sm_io_fgets(e->e_xfp, SM_TIME_DEFAULT, 209 buf, sizeof(buf)) != NULL && 210 !sm_io_error(smioout)) 211 (void) sm_io_fputs(smioout, 212 SM_TIME_DEFAULT, 213 buf); 214 } 215 else 216 { 217 syserr("Cannot open %s", 218 queuename(e, XSCRPT_LETTER)); 219 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, 220 "Transcript of session is unavailable.\r\n"); 221 } 222 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, 223 "Original message will be saved in dead.letter.\r\n"); 224 state = ESM_DEADLETTER; 225 break; 226 227 case ESM_MAIL: 228 /* 229 ** If mailing back, do it. 230 ** Throw away all further output. Don't alias, 231 ** since this could cause loops, e.g., if joe 232 ** mails to joe@x, and for some reason the network 233 ** for @x is down, then the response gets sent to 234 ** joe@x, which gives a response, etc. Also force 235 ** the mail to be delivered even if a version of 236 ** it has already been sent to the sender. 237 ** 238 ** If this is a configuration or local software 239 ** error, send to the local postmaster as well, 240 ** since the originator can't do anything 241 ** about it anyway. Note that this is a full 242 ** copy of the message (intentionally) so that 243 ** the Postmaster can forward things along. 244 */ 245 246 if (ExitStat == EX_CONFIG || ExitStat == EX_SOFTWARE) 247 { 248 (void) sendtolist("postmaster", NULLADDR, 249 &e->e_errorqueue, 0, e); 250 } 251 if (!emptyaddr(&e->e_from)) 252 { 253 char from[TOBUFSIZE]; 254 255 if (sm_strlcpy(from, e->e_from.q_paddr, 256 sizeof(from)) >= sizeof(from)) 257 { 258 state = ESM_POSTMASTER; 259 break; 260 } 261 262 if (!DontPruneRoutes) 263 (void) pruneroute(from); 264 265 (void) sendtolist(from, NULLADDR, 266 &e->e_errorqueue, 0, e); 267 } 268 269 /* 270 ** Deliver a non-delivery report to the 271 ** Postmaster-designate (not necessarily 272 ** Postmaster). This does not include the 273 ** body of the message, for privacy reasons. 274 ** You really shouldn't need this. 275 */ 276 277 e->e_flags |= EF_PM_NOTIFY; 278 279 /* check to see if there are any good addresses */ 280 for (q = e->e_errorqueue; q != NULL; q = q->q_next) 281 { 282 if (QS_IS_SENDABLE(q->q_state)) 283 break; 284 } 285 if (q == NULL) 286 { 287 /* this is an error-error */ 288 state = ESM_POSTMASTER; 289 break; 290 } 291 if (returntosender(e->e_message, e->e_errorqueue, 292 sendbody ? RTSF_SEND_BODY 293 : RTSF_NO_BODY, 294 e) == 0) 295 { 296 state = ESM_DONE; 297 break; 298 } 299 300 /* didn't work -- return to postmaster */ 301 state = ESM_POSTMASTER; 302 break; 303 304 case ESM_POSTMASTER: 305 /* 306 ** Similar to previous case, but to system postmaster. 307 */ 308 309 q = NULL; 310 expand(DoubleBounceAddr, buf, sizeof(buf), e); 311 312 /* 313 ** Just drop it on the floor if DoubleBounceAddr 314 ** expands to an empty string. 315 */ 316 317 if (*buf == '\0') 318 { 319 state = ESM_DONE; 320 break; 321 } 322 if (sendtolist(buf, NULLADDR, &q, 0, e) <= 0) 323 { 324 syserr("553 5.3.0 cannot parse %s!", buf); 325 ExitStat = EX_SOFTWARE; 326 state = ESM_DEADLETTERDROP; 327 break; 328 } 329 flags = RTSF_PM_BOUNCE; 330 if (sendbody) 331 flags |= RTSF_SEND_BODY; 332 if (returntosender(e->e_message, q, flags, e) == 0) 333 { 334 state = ESM_DONE; 335 break; 336 } 337 338 /* didn't work -- last resort */ 339 state = ESM_DEADLETTERDROP; 340 break; 341 342 case ESM_DEADLETTER: 343 /* 344 ** Save the message in dead.letter. 345 ** If we weren't mailing back, and the user is 346 ** local, we should save the message in 347 ** ~/dead.letter so that the poor person doesn't 348 ** have to type it over again -- and we all know 349 ** what poor typists UNIX users are. 350 */ 351 352 p = NULL; 353 if (bitnset(M_HASPWENT, e->e_from.q_mailer->m_flags)) 354 { 355 if (e->e_from.q_home != NULL) 356 p = e->e_from.q_home; 357 else if (sm_mbdb_lookup(e->e_from.q_user, &user) 358 == EX_OK && 359 *user.mbdb_homedir != '\0') 360 p = user.mbdb_homedir; 361 } 362 if (p == NULL || e->e_dfp == NULL) 363 { 364 /* no local directory or no data file */ 365 state = ESM_MAIL; 366 break; 367 } 368 369 /* we have a home directory; write dead.letter */ 370 macdefine(&e->e_macro, A_TEMP, 'z', p); 371 372 /* get the sender for the UnixFromLine */ 373 p = macvalue('g', e); 374 macdefine(&e->e_macro, A_PERM, 'g', e->e_sender); 375 376 expand("\201z/dead.letter", dlbuf, sizeof(dlbuf), e); 377 sff = SFF_CREAT|SFF_REGONLY|SFF_RUNASREALUID; 378 if (RealUid == 0) 379 sff |= SFF_ROOTOK; 380 e->e_to = dlbuf; 381 if (writable(dlbuf, NULL, sff) && 382 mailfile(dlbuf, FileMailer, NULL, sff, e) == EX_OK) 383 { 384 int oldverb = Verbose; 385 386 if (OpMode != MD_DAEMON && OpMode != MD_SMTP) 387 Verbose = 1; 388 if (Verbose > 0) 389 message("Saved message in %s", dlbuf); 390 Verbose = oldverb; 391 macdefine(&e->e_macro, A_PERM, 'g', p); 392 state = ESM_DONE; 393 break; 394 } 395 macdefine(&e->e_macro, A_PERM, 'g', p); 396 state = ESM_MAIL; 397 break; 398 399 case ESM_DEADLETTERDROP: 400 /* 401 ** Log the mail in DeadLetterDrop file. 402 */ 403 404 if (e->e_class < 0) 405 { 406 state = ESM_DONE; 407 break; 408 } 409 410 if ((SafeFileEnv != NULL && SafeFileEnv[0] != '\0') || 411 DeadLetterDrop == NULL || 412 DeadLetterDrop[0] == '\0') 413 { 414 state = ESM_PANIC; 415 break; 416 } 417 418 sff = SFF_CREAT|SFF_REGONLY|SFF_ROOTOK|SFF_OPENASROOT|SFF_MUSTOWN; 419 if (!writable(DeadLetterDrop, NULL, sff) || 420 (fp = safefopen(DeadLetterDrop, O_WRONLY|O_APPEND, 421 FileMode, sff)) == NULL) 422 { 423 state = ESM_PANIC; 424 break; 425 } 426 427 memset(&mcibuf, '\0', sizeof(mcibuf)); 428 mcibuf.mci_out = fp; 429 mcibuf.mci_mailer = FileMailer; 430 if (bitnset(M_7BITS, FileMailer->m_flags)) 431 mcibuf.mci_flags |= MCIF_7BIT; 432 433 /* get the sender for the UnixFromLine */ 434 p = macvalue('g', e); 435 macdefine(&e->e_macro, A_PERM, 'g', e->e_sender); 436 437 if (!putfromline(&mcibuf, e) || 438 !(*e->e_puthdr)(&mcibuf, e->e_header, e, 439 M87F_OUTER) || 440 !(*e->e_putbody)(&mcibuf, e, NULL) || 441 !putline("\n", &mcibuf) || 442 sm_io_flush(fp, SM_TIME_DEFAULT) == SM_IO_EOF || 443 sm_io_error(fp) || 444 sm_io_close(fp, SM_TIME_DEFAULT) < 0) 445 state = ESM_PANIC; 446 else 447 { 448 int oldverb = Verbose; 449 450 if (OpMode != MD_DAEMON && OpMode != MD_SMTP) 451 Verbose = 1; 452 if (Verbose > 0) 453 message("Saved message in %s", 454 DeadLetterDrop); 455 Verbose = oldverb; 456 if (LogLevel > 3) 457 sm_syslog(LOG_NOTICE, e->e_id, 458 "Saved message in %s", 459 DeadLetterDrop); 460 state = ESM_DONE; 461 } 462 macdefine(&e->e_macro, A_PERM, 'g', p); 463 break; 464 465 default: 466 syserr("554 5.3.5 savemail: unknown state %d", state); 467 /* FALLTHROUGH */ 468 469 case ESM_PANIC: 470 /* leave the locked queue & transcript files around */ 471 loseqfile(e, "savemail panic"); 472 panic = true; 473 errno = 0; 474 syserr("554 savemail: cannot save rejected email anywhere"); 475 state = ESM_DONE; 476 break; 477 } 478 } 479 return panic; 480 } 481 /* 482 ** RETURNTOSENDER -- return a message to the sender with an error. 483 ** 484 ** Parameters: 485 ** msg -- the explanatory message. 486 ** returnq -- the queue of people to send the message to. 487 ** flags -- flags tweaking the operation: 488 ** RTSF_SENDBODY -- include body of message (otherwise 489 ** just send the header). 490 ** RTSF_PMBOUNCE -- this is a postmaster bounce. 491 ** e -- the current envelope. 492 ** 493 ** Returns: 494 ** zero -- if everything went ok. 495 ** else -- some error. 496 ** 497 ** Side Effects: 498 ** Returns the current message to the sender via mail. 499 */ 500 501 #define MAXRETURNS 6 /* max depth of returning messages */ 502 #define ERRORFUDGE 1024 /* nominal size of error message text */ 503 504 int 505 returntosender(msg, returnq, flags, e) 506 char *msg; 507 ADDRESS *returnq; 508 int flags; 509 register ENVELOPE *e; 510 { 511 register ENVELOPE *ee; 512 ENVELOPE *oldcur = CurEnv; 513 ENVELOPE errenvelope; 514 static int returndepth = 0; 515 register ADDRESS *q; 516 char *p; 517 char buf[MAXNAME + 1]; 518 519 if (returnq == NULL) 520 return -1; 521 522 if (msg == NULL) 523 msg = "Unable to deliver mail"; 524 525 if (tTd(6, 1)) 526 { 527 sm_dprintf("\n*** Return To Sender: msg=\"%s\", depth=%d, e=%p, returnq=", 528 msg, returndepth, e); 529 printaddr(sm_debug_file(), returnq, true); 530 if (tTd(6, 20)) 531 { 532 sm_dprintf("Sendq="); 533 printaddr(sm_debug_file(), e->e_sendqueue, true); 534 } 535 } 536 537 if (++returndepth >= MAXRETURNS) 538 { 539 if (returndepth != MAXRETURNS) 540 syserr("554 5.3.0 returntosender: infinite recursion on %s", 541 returnq->q_paddr); 542 /* don't "unrecurse" and fake a clean exit */ 543 /* returndepth--; */ 544 return 0; 545 } 546 547 macdefine(&e->e_macro, A_PERM, 'g', e->e_sender); 548 macdefine(&e->e_macro, A_PERM, 'u', NULL); 549 550 /* initialize error envelope */ 551 ee = newenvelope(&errenvelope, e, sm_rpool_new_x(NULL)); 552 macdefine(&ee->e_macro, A_PERM, 'a', "\201b"); 553 macdefine(&ee->e_macro, A_PERM, 'r', ""); 554 macdefine(&ee->e_macro, A_PERM, 's', "localhost"); 555 macdefine(&ee->e_macro, A_PERM, '_', "localhost"); 556 clrsessenvelope(ee); 557 558 ee->e_puthdr = putheader; 559 ee->e_putbody = errbody; 560 ee->e_flags |= EF_RESPONSE|EF_METOO; 561 if (!bitset(EF_OLDSTYLE, e->e_flags)) 562 ee->e_flags &= ~EF_OLDSTYLE; 563 if (bitset(EF_DONT_MIME, e->e_flags)) 564 { 565 ee->e_flags |= EF_DONT_MIME; 566 567 /* 568 ** If we can't convert to MIME and we don't pass 569 ** 8-bit, we can't send the body. 570 */ 571 572 if (bitset(EF_HAS8BIT, e->e_flags) && 573 !bitset(MM_PASS8BIT, MimeMode)) 574 flags &= ~RTSF_SEND_BODY; 575 } 576 577 ee->e_sendqueue = returnq; 578 ee->e_msgsize = 0; 579 if (bitset(RTSF_SEND_BODY, flags) && 580 !bitset(PRIV_NOBODYRETN, PrivacyFlags)) 581 ee->e_msgsize = ERRORFUDGE + e->e_msgsize; 582 else 583 ee->e_flags |= EF_NO_BODY_RETN; 584 585 if (!setnewqueue(ee)) 586 { 587 syserr("554 5.3.0 returntosender: cannot select queue for %s", 588 returnq->q_paddr); 589 ExitStat = EX_UNAVAILABLE; 590 returndepth--; 591 return -1; 592 } 593 initsys(ee); 594 595 #if NAMED_BIND 596 _res.retry = TimeOuts.res_retry[RES_TO_FIRST]; 597 _res.retrans = TimeOuts.res_retrans[RES_TO_FIRST]; 598 #endif /* NAMED_BIND */ 599 for (q = returnq; q != NULL; q = q->q_next) 600 { 601 if (QS_IS_BADADDR(q->q_state)) 602 continue; 603 604 q->q_flags &= ~(QHASNOTIFY|Q_PINGFLAGS); 605 q->q_flags |= QPINGONFAILURE; 606 607 if (!QS_IS_DEAD(q->q_state)) 608 ee->e_nrcpts++; 609 610 if (q->q_alias == NULL) 611 addheader("To", q->q_paddr, 0, ee, true); 612 } 613 614 if (LogLevel > 5) 615 { 616 if (bitset(EF_RESPONSE, e->e_flags)) 617 p = "return to sender"; 618 else if (bitset(EF_WARNING, e->e_flags)) 619 p = "sender notify"; 620 else if (bitset(RTSF_PM_BOUNCE, flags)) 621 p = "postmaster notify"; 622 else 623 p = "DSN"; 624 sm_syslog(LOG_INFO, e->e_id, "%s: %s: %s", 625 ee->e_id, p, shortenstring(msg, MAXSHORTSTR)); 626 } 627 628 if (SendMIMEErrors) 629 { 630 addheader("MIME-Version", "1.0", 0, ee, true); 631 (void) sm_snprintf(buf, sizeof(buf), "%s.%ld/%.100s", 632 ee->e_id, (long)curtime(), MyHostName); 633 ee->e_msgboundary = sm_rpool_strdup_x(ee->e_rpool, buf); 634 (void) sm_snprintf(buf, sizeof(buf), 635 #if DSN 636 "multipart/report; report-type=delivery-status;\n\tboundary=\"%s\"", 637 #else /* DSN */ 638 "multipart/mixed; boundary=\"%s\"", 639 #endif /* DSN */ 640 ee->e_msgboundary); 641 addheader("Content-Type", buf, 0, ee, true); 642 643 p = hvalue("Content-Transfer-Encoding", e->e_header); 644 if (p != NULL && sm_strcasecmp(p, "binary") != 0) 645 p = NULL; 646 if (p == NULL && bitset(EF_HAS8BIT, e->e_flags)) 647 p = "8bit"; 648 if (p != NULL) 649 addheader("Content-Transfer-Encoding", p, 0, ee, true); 650 } 651 if (strncmp(msg, "Warning:", 8) == 0) 652 { 653 addheader("Subject", msg, 0, ee, true); 654 p = "warning-timeout"; 655 } 656 else if (strncmp(msg, "Postmaster warning:", 19) == 0) 657 { 658 addheader("Subject", msg, 0, ee, true); 659 p = "postmaster-warning"; 660 } 661 else if (strcmp(msg, "Return receipt") == 0) 662 { 663 addheader("Subject", msg, 0, ee, true); 664 p = "return-receipt"; 665 } 666 else if (bitset(RTSF_PM_BOUNCE, flags)) 667 { 668 (void) sm_snprintf(buf, sizeof(buf), 669 "Postmaster notify: see transcript for details"); 670 addheader("Subject", buf, 0, ee, true); 671 p = "postmaster-notification"; 672 } 673 else 674 { 675 (void) sm_snprintf(buf, sizeof(buf), 676 "Returned mail: see transcript for details"); 677 addheader("Subject", buf, 0, ee, true); 678 p = "failure"; 679 } 680 (void) sm_snprintf(buf, sizeof(buf), "auto-generated (%s)", p); 681 addheader("Auto-Submitted", buf, 0, ee, true); 682 683 /* fake up an address header for the from person */ 684 expand("\201n", buf, sizeof(buf), e); 685 if (parseaddr(buf, &ee->e_from, 686 RF_COPYALL|RF_SENDERADDR, '\0', NULL, e, false) == NULL) 687 { 688 syserr("553 5.3.5 Can't parse myself!"); 689 ExitStat = EX_SOFTWARE; 690 returndepth--; 691 return -1; 692 } 693 ee->e_from.q_flags &= ~(QHASNOTIFY|Q_PINGFLAGS); 694 ee->e_from.q_flags |= QPINGONFAILURE; 695 ee->e_sender = ee->e_from.q_paddr; 696 697 /* push state into submessage */ 698 CurEnv = ee; 699 macdefine(&ee->e_macro, A_PERM, 'f', "\201n"); 700 macdefine(&ee->e_macro, A_PERM, 'x', "Mail Delivery Subsystem"); 701 eatheader(ee, true, true); 702 703 /* mark statistics */ 704 markstats(ee, NULLADDR, STATS_NORMAL); 705 706 /* actually deliver the error message */ 707 sendall(ee, SM_DELIVER); 708 709 /* restore state */ 710 dropenvelope(ee, true, false); 711 sm_rpool_free(ee->e_rpool); 712 CurEnv = oldcur; 713 returndepth--; 714 715 /* check for delivery errors */ 716 if (ee->e_parent == NULL || 717 !bitset(EF_RESPONSE, ee->e_parent->e_flags)) 718 return 0; 719 for (q = ee->e_sendqueue; q != NULL; q = q->q_next) 720 { 721 if (QS_IS_ATTEMPTED(q->q_state)) 722 return 0; 723 } 724 return -1; 725 } 726 /* 727 ** ERRBODY -- output the body of an error message. 728 ** 729 ** Typically this is a copy of the transcript plus a copy of the 730 ** original offending message. 731 ** 732 ** Parameters: 733 ** mci -- the mailer connection information. 734 ** e -- the envelope we are working in. 735 ** separator -- any possible MIME separator (unused). 736 ** 737 ** Returns: 738 ** true iff body was written successfully 739 ** 740 ** Side Effects: 741 ** Outputs the body of an error message. 742 */ 743 744 /* ARGSUSED2 */ 745 static bool 746 errbody(mci, e, separator) 747 register MCI *mci; 748 register ENVELOPE *e; 749 char *separator; 750 { 751 bool printheader; 752 bool sendbody; 753 bool pm_notify; 754 int save_errno; 755 register SM_FILE_T *xfile; 756 char *p; 757 register ADDRESS *q = NULL; 758 char actual[MAXLINE]; 759 char buf[MAXLINE]; 760 761 if (bitset(MCIF_INHEADER, mci->mci_flags)) 762 { 763 if (!putline("", mci)) 764 goto writeerr; 765 mci->mci_flags &= ~MCIF_INHEADER; 766 } 767 if (e->e_parent == NULL) 768 { 769 syserr("errbody: null parent"); 770 if (!putline(" ----- Original message lost -----\n", mci)) 771 goto writeerr; 772 return true; 773 } 774 775 /* 776 ** Output MIME header. 777 */ 778 779 if (e->e_msgboundary != NULL) 780 { 781 (void) sm_strlcpyn(buf, sizeof(buf), 2, "--", e->e_msgboundary); 782 if (!putline("This is a MIME-encapsulated message", mci) || 783 !putline("", mci) || 784 !putline(buf, mci) || 785 !putline("", mci)) 786 goto writeerr; 787 } 788 789 /* 790 ** Output introductory information. 791 */ 792 793 pm_notify = false; 794 p = hvalue("subject", e->e_header); 795 if (p != NULL && strncmp(p, "Postmaster ", 11) == 0) 796 pm_notify = true; 797 else 798 { 799 for (q = e->e_parent->e_sendqueue; q != NULL; q = q->q_next) 800 { 801 if (QS_IS_BADADDR(q->q_state)) 802 break; 803 } 804 } 805 if (!pm_notify && q == NULL && 806 !bitset(EF_FATALERRS|EF_SENDRECEIPT, e->e_parent->e_flags)) 807 { 808 if (!putline(" **********************************************", 809 mci) || 810 !putline(" ** THIS IS A WARNING MESSAGE ONLY **", 811 mci) || 812 !putline(" ** YOU DO NOT NEED TO RESEND YOUR MESSAGE **", 813 mci) || 814 !putline(" **********************************************", 815 mci) || 816 !putline("", mci)) 817 goto writeerr; 818 } 819 (void) sm_snprintf(buf, sizeof(buf), 820 "The original message was received at %s", 821 arpadate(ctime(&e->e_parent->e_ctime))); 822 if (!putline(buf, mci)) 823 goto writeerr; 824 expand("from \201_", buf, sizeof(buf), e->e_parent); 825 if (!putline(buf, mci)) 826 goto writeerr; 827 828 /* include id in postmaster copies */ 829 if (pm_notify && e->e_parent->e_id != NULL) 830 { 831 (void) sm_strlcpyn(buf, sizeof(buf), 2, "with id ", 832 e->e_parent->e_id); 833 if (!putline(buf, mci)) 834 goto writeerr; 835 } 836 if (!putline("", mci)) 837 goto writeerr; 838 839 /* 840 ** Output error message header (if specified and available). 841 */ 842 843 if (ErrMsgFile != NULL && 844 !bitset(EF_SENDRECEIPT, e->e_parent->e_flags)) 845 { 846 if (*ErrMsgFile == '/') 847 { 848 long sff = SFF_ROOTOK|SFF_REGONLY; 849 850 if (DontLockReadFiles) 851 sff |= SFF_NOLOCK; 852 if (!bitnset(DBS_ERRORHEADERINUNSAFEDIRPATH, 853 DontBlameSendmail)) 854 sff |= SFF_SAFEDIRPATH; 855 xfile = safefopen(ErrMsgFile, O_RDONLY, 0444, sff); 856 if (xfile != NULL) 857 { 858 while (sm_io_fgets(xfile, SM_TIME_DEFAULT, buf, 859 sizeof(buf)) != NULL) 860 { 861 int lbs; 862 bool putok; 863 char *lbp; 864 865 lbs = sizeof(buf); 866 lbp = translate_dollars(buf, buf, &lbs); 867 expand(lbp, lbp, lbs, e); 868 putok = putline(lbp, mci); 869 if (lbp != buf) 870 sm_free(lbp); 871 if (!putok) 872 goto writeerr; 873 } 874 (void) sm_io_close(xfile, SM_TIME_DEFAULT); 875 if (!putline("\n", mci)) 876 goto writeerr; 877 } 878 } 879 else 880 { 881 expand(ErrMsgFile, buf, sizeof(buf), e); 882 if (!putline(buf, mci) || !putline("", mci)) 883 goto writeerr; 884 } 885 } 886 887 /* 888 ** Output message introduction 889 */ 890 891 /* permanent fatal errors */ 892 printheader = true; 893 for (q = e->e_parent->e_sendqueue; q != NULL; q = q->q_next) 894 { 895 if (!QS_IS_BADADDR(q->q_state) || 896 !bitset(QPINGONFAILURE, q->q_flags)) 897 continue; 898 899 if (printheader) 900 { 901 if (!putline(" ----- The following addresses had permanent fatal errors -----", 902 mci)) 903 goto writeerr; 904 printheader = false; 905 } 906 907 (void) sm_strlcpy(buf, shortenstring(q->q_paddr, MAXSHORTSTR), 908 sizeof(buf)); 909 if (!putline(buf, mci)) 910 goto writeerr; 911 if (q->q_rstatus != NULL) 912 { 913 (void) sm_snprintf(buf, sizeof(buf), 914 " (reason: %s)", 915 shortenstring(exitstat(q->q_rstatus), 916 MAXSHORTSTR)); 917 if (!putline(buf, mci)) 918 goto writeerr; 919 } 920 if (q->q_alias != NULL) 921 { 922 (void) sm_snprintf(buf, sizeof(buf), 923 " (expanded from: %s)", 924 shortenstring(q->q_alias->q_paddr, 925 MAXSHORTSTR)); 926 if (!putline(buf, mci)) 927 goto writeerr; 928 } 929 } 930 if (!printheader && !putline("", mci)) 931 goto writeerr; 932 933 /* transient non-fatal errors */ 934 printheader = true; 935 for (q = e->e_parent->e_sendqueue; q != NULL; q = q->q_next) 936 { 937 if (QS_IS_BADADDR(q->q_state) || 938 !bitset(QPRIMARY, q->q_flags) || 939 !bitset(QBYNDELAY, q->q_flags) || 940 !bitset(QDELAYED, q->q_flags)) 941 continue; 942 943 if (printheader) 944 { 945 if (!putline(" ----- The following addresses had transient non-fatal errors -----", 946 mci)) 947 goto writeerr; 948 printheader = false; 949 } 950 951 (void) sm_strlcpy(buf, shortenstring(q->q_paddr, MAXSHORTSTR), 952 sizeof(buf)); 953 if (!putline(buf, mci)) 954 goto writeerr; 955 if (q->q_alias != NULL) 956 { 957 (void) sm_snprintf(buf, sizeof(buf), 958 " (expanded from: %s)", 959 shortenstring(q->q_alias->q_paddr, 960 MAXSHORTSTR)); 961 if (!putline(buf, mci)) 962 goto writeerr; 963 } 964 } 965 if (!printheader && !putline("", mci)) 966 goto writeerr; 967 968 /* successful delivery notifications */ 969 printheader = true; 970 for (q = e->e_parent->e_sendqueue; q != NULL; q = q->q_next) 971 { 972 if (QS_IS_BADADDR(q->q_state) || 973 !bitset(QPRIMARY, q->q_flags) || 974 bitset(QBYNDELAY, q->q_flags) || 975 bitset(QDELAYED, q->q_flags)) 976 continue; 977 else if (bitset(QBYNRELAY, q->q_flags)) 978 p = "Deliver-By notify: relayed"; 979 else if (bitset(QBYTRACE, q->q_flags)) 980 p = "Deliver-By trace: relayed"; 981 else if (!bitset(QPINGONSUCCESS, q->q_flags)) 982 continue; 983 else if (bitset(QRELAYED, q->q_flags)) 984 p = "relayed to non-DSN-aware mailer"; 985 else if (bitset(QDELIVERED, q->q_flags)) 986 { 987 if (bitset(QEXPANDED, q->q_flags)) 988 p = "successfully delivered to mailing list"; 989 else 990 p = "successfully delivered to mailbox"; 991 } 992 else if (bitset(QEXPANDED, q->q_flags)) 993 p = "expanded by alias"; 994 else 995 continue; 996 997 if (printheader) 998 { 999 if (!putline(" ----- The following addresses had successful delivery notifications -----", 1000 mci)) 1001 goto writeerr; 1002 printheader = false; 1003 } 1004 1005 (void) sm_snprintf(buf, sizeof(buf), "%s (%s)", 1006 shortenstring(q->q_paddr, MAXSHORTSTR), p); 1007 if (!putline(buf, mci)) 1008 goto writeerr; 1009 if (q->q_alias != NULL) 1010 { 1011 (void) sm_snprintf(buf, sizeof(buf), 1012 " (expanded from: %s)", 1013 shortenstring(q->q_alias->q_paddr, 1014 MAXSHORTSTR)); 1015 if (!putline(buf, mci)) 1016 goto writeerr; 1017 } 1018 } 1019 if (!printheader && !putline("", mci)) 1020 goto writeerr; 1021 1022 /* 1023 ** Output transcript of errors 1024 */ 1025 1026 (void) sm_io_flush(smioout, SM_TIME_DEFAULT); 1027 if (e->e_parent->e_xfp == NULL) 1028 { 1029 if (!putline(" ----- Transcript of session is unavailable -----\n", 1030 mci)) 1031 goto writeerr; 1032 } 1033 else 1034 { 1035 printheader = true; 1036 (void) bfrewind(e->e_parent->e_xfp); 1037 if (e->e_xfp != NULL) 1038 (void) sm_io_flush(e->e_xfp, SM_TIME_DEFAULT); 1039 while (sm_io_fgets(e->e_parent->e_xfp, SM_TIME_DEFAULT, buf, 1040 sizeof(buf)) != NULL) 1041 { 1042 if (printheader && !putline(" ----- Transcript of session follows -----\n", 1043 mci)) 1044 goto writeerr; 1045 printheader = false; 1046 if (!putline(buf, mci)) 1047 goto writeerr; 1048 } 1049 } 1050 errno = 0; 1051 1052 #if DSN 1053 /* 1054 ** Output machine-readable version. 1055 */ 1056 1057 if (e->e_msgboundary != NULL) 1058 { 1059 (void) sm_strlcpyn(buf, sizeof(buf), 2, "--", e->e_msgboundary); 1060 if (!putline("", mci) || 1061 !putline(buf, mci) || 1062 !putline("Content-Type: message/delivery-status", mci) || 1063 !putline("", mci)) 1064 goto writeerr; 1065 1066 /* 1067 ** Output per-message information. 1068 */ 1069 1070 /* original envelope id from MAIL FROM: line */ 1071 if (e->e_parent->e_envid != NULL) 1072 { 1073 (void) sm_snprintf(buf, sizeof(buf), 1074 "Original-Envelope-Id: %.800s", 1075 xuntextify(e->e_parent->e_envid)); 1076 if (!putline(buf, mci)) 1077 goto writeerr; 1078 } 1079 1080 /* Reporting-MTA: is us (required) */ 1081 (void) sm_snprintf(buf, sizeof(buf), 1082 "Reporting-MTA: dns; %.800s", MyHostName); 1083 if (!putline(buf, mci)) 1084 goto writeerr; 1085 1086 /* DSN-Gateway: not relevant since we are not translating */ 1087 1088 /* Received-From-MTA: shows where we got this message from */ 1089 if (RealHostName != NULL) 1090 { 1091 /* XXX use $s for type? */ 1092 if (e->e_parent->e_from.q_mailer == NULL || 1093 (p = e->e_parent->e_from.q_mailer->m_mtatype) == NULL) 1094 p = "dns"; 1095 (void) sm_snprintf(buf, sizeof(buf), 1096 "Received-From-MTA: %s; %.800s", 1097 p, RealHostName); 1098 if (!putline(buf, mci)) 1099 goto writeerr; 1100 } 1101 1102 /* Arrival-Date: -- when it arrived here */ 1103 (void) sm_strlcpyn(buf, sizeof(buf), 2, "Arrival-Date: ", 1104 arpadate(ctime(&e->e_parent->e_ctime))); 1105 if (!putline(buf, mci)) 1106 goto writeerr; 1107 1108 /* Deliver-By-Date: -- when it should have been delivered */ 1109 if (IS_DLVR_BY(e->e_parent)) 1110 { 1111 time_t dbyd; 1112 1113 dbyd = e->e_parent->e_ctime + e->e_parent->e_deliver_by; 1114 (void) sm_strlcpyn(buf, sizeof(buf), 2, 1115 "Deliver-By-Date: ", 1116 arpadate(ctime(&dbyd))); 1117 if (!putline(buf, mci)) 1118 goto writeerr; 1119 } 1120 1121 /* 1122 ** Output per-address information. 1123 */ 1124 1125 for (q = e->e_parent->e_sendqueue; q != NULL; q = q->q_next) 1126 { 1127 char *action; 1128 1129 if (QS_IS_BADADDR(q->q_state)) 1130 { 1131 /* RFC 1891, 6.2.6 (b) */ 1132 if (bitset(QHASNOTIFY, q->q_flags) && 1133 !bitset(QPINGONFAILURE, q->q_flags)) 1134 continue; 1135 action = "failed"; 1136 } 1137 else if (!bitset(QPRIMARY, q->q_flags)) 1138 continue; 1139 else if (bitset(QDELIVERED, q->q_flags)) 1140 { 1141 if (bitset(QEXPANDED, q->q_flags)) 1142 action = "delivered (to mailing list)"; 1143 else 1144 action = "delivered (to mailbox)"; 1145 } 1146 else if (bitset(QRELAYED, q->q_flags)) 1147 action = "relayed (to non-DSN-aware mailer)"; 1148 else if (bitset(QEXPANDED, q->q_flags)) 1149 action = "expanded (to multi-recipient alias)"; 1150 else if (bitset(QDELAYED, q->q_flags)) 1151 action = "delayed"; 1152 else if (bitset(QBYTRACE, q->q_flags)) 1153 action = "relayed (Deliver-By trace mode)"; 1154 else if (bitset(QBYNDELAY, q->q_flags)) 1155 action = "delayed (Deliver-By notify mode)"; 1156 else if (bitset(QBYNRELAY, q->q_flags)) 1157 action = "relayed (Deliver-By notify mode)"; 1158 else 1159 continue; 1160 1161 if (!putline("", mci)) 1162 goto writeerr; 1163 1164 /* Original-Recipient: -- passed from on high */ 1165 if (q->q_orcpt != NULL) 1166 { 1167 (void) sm_snprintf(buf, sizeof(buf), 1168 "Original-Recipient: %.800s", 1169 q->q_orcpt); 1170 if (!putline(buf, mci)) 1171 goto writeerr; 1172 } 1173 1174 /* Figure out actual recipient */ 1175 actual[0] = '\0'; 1176 if (q->q_user[0] != '\0') 1177 { 1178 if (q->q_mailer != NULL && 1179 q->q_mailer->m_addrtype != NULL) 1180 p = q->q_mailer->m_addrtype; 1181 else 1182 p = "rfc822"; 1183 1184 if (sm_strcasecmp(p, "rfc822") == 0 && 1185 strchr(q->q_user, '@') == NULL) 1186 { 1187 (void) sm_snprintf(actual, 1188 sizeof(actual), 1189 "%s; %.700s@%.100s", 1190 p, q->q_user, 1191 MyHostName); 1192 } 1193 else 1194 { 1195 (void) sm_snprintf(actual, 1196 sizeof(actual), 1197 "%s; %.800s", 1198 p, q->q_user); 1199 } 1200 } 1201 1202 /* Final-Recipient: -- the name from the RCPT command */ 1203 if (q->q_finalrcpt == NULL) 1204 { 1205 /* should never happen */ 1206 sm_syslog(LOG_ERR, e->e_id, 1207 "returntosender: q_finalrcpt is NULL"); 1208 1209 /* try to fall back to the actual recipient */ 1210 if (actual[0] != '\0') 1211 q->q_finalrcpt = sm_rpool_strdup_x(e->e_rpool, 1212 actual); 1213 } 1214 1215 if (q->q_finalrcpt != NULL) 1216 { 1217 (void) sm_snprintf(buf, sizeof(buf), 1218 "Final-Recipient: %s", 1219 q->q_finalrcpt); 1220 if (!putline(buf, mci)) 1221 goto writeerr; 1222 } 1223 1224 /* X-Actual-Recipient: -- the real problem address */ 1225 if (actual[0] != '\0' && 1226 q->q_finalrcpt != NULL && 1227 !bitset(PRIV_NOACTUALRECIPIENT, PrivacyFlags) && 1228 strcmp(actual, q->q_finalrcpt) != 0) 1229 { 1230 (void) sm_snprintf(buf, sizeof(buf), 1231 "X-Actual-Recipient: %s", 1232 actual); 1233 if (!putline(buf, mci)) 1234 goto writeerr; 1235 } 1236 1237 /* Action: -- what happened? */ 1238 (void) sm_strlcpyn(buf, sizeof(buf), 2, "Action: ", 1239 action); 1240 if (!putline(buf, mci)) 1241 goto writeerr; 1242 1243 /* Status: -- what _really_ happened? */ 1244 if (q->q_status != NULL) 1245 p = q->q_status; 1246 else if (QS_IS_BADADDR(q->q_state)) 1247 p = "5.0.0"; 1248 else if (QS_IS_QUEUEUP(q->q_state)) 1249 p = "4.0.0"; 1250 else 1251 p = "2.0.0"; 1252 (void) sm_strlcpyn(buf, sizeof(buf), 2, "Status: ", p); 1253 if (!putline(buf, mci)) 1254 goto writeerr; 1255 1256 /* Remote-MTA: -- who was I talking to? */ 1257 if (q->q_statmta != NULL) 1258 { 1259 if (q->q_mailer == NULL || 1260 (p = q->q_mailer->m_mtatype) == NULL) 1261 p = "dns"; 1262 (void) sm_snprintf(buf, sizeof(buf), 1263 "Remote-MTA: %s; %.800s", 1264 p, q->q_statmta); 1265 p = &buf[strlen(buf) - 1]; 1266 if (*p == '.') 1267 *p = '\0'; 1268 if (!putline(buf, mci)) 1269 goto writeerr; 1270 } 1271 1272 /* Diagnostic-Code: -- actual result from other end */ 1273 if (q->q_rstatus != NULL) 1274 { 1275 if (q->q_mailer == NULL || 1276 (p = q->q_mailer->m_diagtype) == NULL) 1277 p = "smtp"; 1278 (void) sm_snprintf(buf, sizeof(buf), 1279 "Diagnostic-Code: %s; %.800s", 1280 p, q->q_rstatus); 1281 if (!putline(buf, mci)) 1282 goto writeerr; 1283 } 1284 1285 /* Last-Attempt-Date: -- fine granularity */ 1286 if (q->q_statdate == (time_t) 0L) 1287 q->q_statdate = curtime(); 1288 (void) sm_strlcpyn(buf, sizeof(buf), 2, 1289 "Last-Attempt-Date: ", 1290 arpadate(ctime(&q->q_statdate))); 1291 if (!putline(buf, mci)) 1292 goto writeerr; 1293 1294 /* Will-Retry-Until: -- for delayed messages only */ 1295 if (QS_IS_QUEUEUP(q->q_state)) 1296 { 1297 time_t xdate; 1298 1299 xdate = e->e_parent->e_ctime + 1300 TimeOuts.to_q_return[e->e_parent->e_timeoutclass]; 1301 (void) sm_strlcpyn(buf, sizeof(buf), 2, 1302 "Will-Retry-Until: ", 1303 arpadate(ctime(&xdate))); 1304 if (!putline(buf, mci)) 1305 goto writeerr; 1306 } 1307 } 1308 } 1309 #endif /* DSN */ 1310 1311 /* 1312 ** Output text of original message 1313 */ 1314 1315 if (!putline("", mci)) 1316 goto writeerr; 1317 if (bitset(EF_HAS_DF, e->e_parent->e_flags)) 1318 { 1319 sendbody = !bitset(EF_NO_BODY_RETN, e->e_parent->e_flags) && 1320 !bitset(EF_NO_BODY_RETN, e->e_flags); 1321 1322 if (e->e_msgboundary == NULL) 1323 { 1324 if (!putline( 1325 sendbody 1326 ? " ----- Original message follows -----\n" 1327 : " ----- Message header follows -----\n", 1328 mci)) 1329 { 1330 goto writeerr; 1331 } 1332 } 1333 else 1334 { 1335 (void) sm_strlcpyn(buf, sizeof(buf), 2, "--", 1336 e->e_msgboundary); 1337 1338 if (!putline(buf, mci)) 1339 goto writeerr; 1340 (void) sm_strlcpyn(buf, sizeof(buf), 2, "Content-Type: ", 1341 sendbody ? "message/rfc822" 1342 : "text/rfc822-headers"); 1343 if (!putline(buf, mci)) 1344 goto writeerr; 1345 1346 p = hvalue("Content-Transfer-Encoding", 1347 e->e_parent->e_header); 1348 if (p != NULL && sm_strcasecmp(p, "binary") != 0) 1349 p = NULL; 1350 if (p == NULL && 1351 bitset(EF_HAS8BIT, e->e_parent->e_flags)) 1352 p = "8bit"; 1353 if (p != NULL) 1354 { 1355 (void) sm_snprintf(buf, sizeof(buf), 1356 "Content-Transfer-Encoding: %s", 1357 p); 1358 if (!putline(buf, mci)) 1359 goto writeerr; 1360 } 1361 } 1362 if (!putline("", mci)) 1363 goto writeerr; 1364 save_errno = errno; 1365 if (!putheader(mci, e->e_parent->e_header, e->e_parent, 1366 M87F_OUTER)) 1367 goto writeerr; 1368 errno = save_errno; 1369 if (sendbody) 1370 { 1371 if (!putbody(mci, e->e_parent, e->e_msgboundary)) 1372 goto writeerr; 1373 } 1374 else if (e->e_msgboundary == NULL) 1375 { 1376 if (!putline("", mci) || 1377 !putline(" ----- Message body suppressed -----", 1378 mci)) 1379 { 1380 goto writeerr; 1381 } 1382 } 1383 } 1384 else if (e->e_msgboundary == NULL) 1385 { 1386 if (!putline(" ----- No message was collected -----\n", mci)) 1387 goto writeerr; 1388 } 1389 1390 if (e->e_msgboundary != NULL) 1391 { 1392 (void) sm_strlcpyn(buf, sizeof(buf), 3, "--", e->e_msgboundary, 1393 "--"); 1394 if (!putline("", mci) || !putline(buf, mci)) 1395 goto writeerr; 1396 } 1397 if (!putline("", mci) || 1398 sm_io_flush(mci->mci_out, SM_TIME_DEFAULT) == SM_IO_EOF) 1399 goto writeerr; 1400 1401 /* 1402 ** Cleanup and exit 1403 */ 1404 1405 if (errno != 0) 1406 { 1407 writeerr: 1408 syserr("errbody: I/O error"); 1409 return false; 1410 } 1411 return true; 1412 } 1413 1414 /* 1415 ** SMTPTODSN -- convert SMTP to DSN status code 1416 ** 1417 ** Parameters: 1418 ** smtpstat -- the smtp status code (e.g., 550). 1419 ** 1420 ** Returns: 1421 ** The DSN version of the status code. 1422 ** 1423 ** Storage Management: 1424 ** smtptodsn() returns a pointer to a character string literal, 1425 ** which will remain valid forever, and thus does not need to 1426 ** be copied. Current code relies on this property. 1427 */ 1428 1429 char * 1430 smtptodsn(smtpstat) 1431 int smtpstat; 1432 { 1433 if (smtpstat < 0) 1434 return "4.4.2"; 1435 1436 switch (smtpstat) 1437 { 1438 case 450: /* Req mail action not taken: mailbox unavailable */ 1439 return "4.2.0"; 1440 1441 case 451: /* Req action aborted: local error in processing */ 1442 return "4.3.0"; 1443 1444 case 452: /* Req action not taken: insufficient sys storage */ 1445 return "4.3.1"; 1446 1447 case 500: /* Syntax error, command unrecognized */ 1448 return "5.5.2"; 1449 1450 case 501: /* Syntax error in parameters or arguments */ 1451 return "5.5.4"; 1452 1453 case 502: /* Command not implemented */ 1454 return "5.5.1"; 1455 1456 case 503: /* Bad sequence of commands */ 1457 return "5.5.1"; 1458 1459 case 504: /* Command parameter not implemented */ 1460 return "5.5.4"; 1461 1462 case 550: /* Req mail action not taken: mailbox unavailable */ 1463 return "5.2.0"; 1464 1465 case 551: /* User not local; please try <...> */ 1466 return "5.1.6"; 1467 1468 case 552: /* Req mail action aborted: exceeded storage alloc */ 1469 return "5.2.2"; 1470 1471 case 553: /* Req action not taken: mailbox name not allowed */ 1472 return "5.1.0"; 1473 1474 case 554: /* Transaction failed */ 1475 return "5.0.0"; 1476 } 1477 1478 if (REPLYTYPE(smtpstat) == 2) 1479 return "2.0.0"; 1480 if (REPLYTYPE(smtpstat) == 4) 1481 return "4.0.0"; 1482 return "5.0.0"; 1483 } 1484 /* 1485 ** XTEXTIFY -- take regular text and turn it into DSN-style xtext 1486 ** 1487 ** Parameters: 1488 ** t -- the text to convert. 1489 ** taboo -- additional characters that must be encoded. 1490 ** 1491 ** Returns: 1492 ** The xtext-ified version of the same string. 1493 */ 1494 1495 char * 1496 xtextify(t, taboo) 1497 register char *t; 1498 char *taboo; 1499 { 1500 register char *p; 1501 int l; 1502 int nbogus; 1503 static char *bp = NULL; 1504 static int bplen = 0; 1505 1506 if (taboo == NULL) 1507 taboo = ""; 1508 1509 /* figure out how long this xtext will have to be */ 1510 nbogus = l = 0; 1511 for (p = t; *p != '\0'; p++) 1512 { 1513 register int c = (*p & 0xff); 1514 1515 /* ASCII dependence here -- this is the way the spec words it */ 1516 if (c < '!' || c > '~' || c == '+' || c == '\\' || c == '(' || 1517 strchr(taboo, c) != NULL) 1518 nbogus++; 1519 l++; 1520 } 1521 if (nbogus < 0) 1522 { 1523 /* since nbogus is ssize_t and wrapped, 2 * size_t would wrap */ 1524 syserr("!xtextify string too long"); 1525 } 1526 if (nbogus == 0) 1527 return t; 1528 l += nbogus * 2 + 1; 1529 1530 /* now allocate space if necessary for the new string */ 1531 if (l > bplen) 1532 { 1533 if (bp != NULL) 1534 sm_free(bp); /* XXX */ 1535 bp = sm_pmalloc_x(l); 1536 bplen = l; 1537 } 1538 1539 /* ok, copy the text with byte expansion */ 1540 for (p = bp; *t != '\0'; ) 1541 { 1542 register int c = (*t++ & 0xff); 1543 1544 /* ASCII dependence here -- this is the way the spec words it */ 1545 if (c < '!' || c > '~' || c == '+' || c == '\\' || c == '(' || 1546 strchr(taboo, c) != NULL) 1547 { 1548 *p++ = '+'; 1549 *p++ = "0123456789ABCDEF"[c >> 4]; 1550 *p++ = "0123456789ABCDEF"[c & 0xf]; 1551 } 1552 else 1553 *p++ = c; 1554 } 1555 *p = '\0'; 1556 return bp; 1557 } 1558 /* 1559 ** XUNTEXTIFY -- take xtext and turn it into plain text 1560 ** 1561 ** Parameters: 1562 ** t -- the xtextified text. 1563 ** 1564 ** Returns: 1565 ** The decoded text. No attempt is made to deal with 1566 ** null strings in the resulting text. 1567 */ 1568 1569 char * 1570 xuntextify(t) 1571 register char *t; 1572 { 1573 register char *p; 1574 int l; 1575 static char *bp = NULL; 1576 static int bplen = 0; 1577 1578 /* heuristic -- if no plus sign, just return the input */ 1579 if (strchr(t, '+') == NULL) 1580 return t; 1581 1582 /* xtext is always longer than decoded text */ 1583 l = strlen(t); 1584 if (l > bplen) 1585 { 1586 if (bp != NULL) 1587 sm_free(bp); /* XXX */ 1588 bp = xalloc(l); 1589 bplen = l; 1590 } 1591 1592 /* ok, copy the text with byte compression */ 1593 for (p = bp; *t != '\0'; t++) 1594 { 1595 register int c = *t & 0xff; 1596 1597 if (c != '+') 1598 { 1599 *p++ = c; 1600 continue; 1601 } 1602 1603 c = *++t & 0xff; 1604 if (!isascii(c) || !isxdigit(c)) 1605 { 1606 /* error -- first digit is not hex */ 1607 usrerr("bogus xtext: +%c", c); 1608 t--; 1609 continue; 1610 } 1611 if (isdigit(c)) 1612 c -= '0'; 1613 else if (isupper(c)) 1614 c -= 'A' - 10; 1615 else 1616 c -= 'a' - 10; 1617 *p = c << 4; 1618 1619 c = *++t & 0xff; 1620 if (!isascii(c) || !isxdigit(c)) 1621 { 1622 /* error -- second digit is not hex */ 1623 usrerr("bogus xtext: +%x%c", *p >> 4, c); 1624 t--; 1625 continue; 1626 } 1627 if (isdigit(c)) 1628 c -= '0'; 1629 else if (isupper(c)) 1630 c -= 'A' - 10; 1631 else 1632 c -= 'a' - 10; 1633 *p++ |= c; 1634 } 1635 *p = '\0'; 1636 return bp; 1637 } 1638 /* 1639 ** XTEXTOK -- check if a string is legal xtext 1640 ** 1641 ** Xtext is used in Delivery Status Notifications. The spec was 1642 ** taken from RFC 1891, ``SMTP Service Extension for Delivery 1643 ** Status Notifications''. 1644 ** 1645 ** Parameters: 1646 ** s -- the string to check. 1647 ** 1648 ** Returns: 1649 ** true -- if 's' is legal xtext. 1650 ** false -- if it has any illegal characters in it. 1651 */ 1652 1653 bool 1654 xtextok(s) 1655 char *s; 1656 { 1657 int c; 1658 1659 while ((c = *s++) != '\0') 1660 { 1661 if (c == '+') 1662 { 1663 c = *s++; 1664 if (!isascii(c) || !isxdigit(c)) 1665 return false; 1666 c = *s++; 1667 if (!isascii(c) || !isxdigit(c)) 1668 return false; 1669 } 1670 else if (c < '!' || c > '~' || c == '=') 1671 return false; 1672 } 1673 return true; 1674 } 1675 /* 1676 ** PRUNEROUTE -- prune an RFC-822 source route 1677 ** 1678 ** Trims down a source route to the last internet-registered hop. 1679 ** This is encouraged by RFC 1123 section 5.3.3. 1680 ** 1681 ** Parameters: 1682 ** addr -- the address 1683 ** 1684 ** Returns: 1685 ** true -- address was modified 1686 ** false -- address could not be pruned 1687 ** 1688 ** Side Effects: 1689 ** modifies addr in-place 1690 */ 1691 1692 static bool 1693 pruneroute(addr) 1694 char *addr; 1695 { 1696 #if NAMED_BIND 1697 char *start, *at, *comma; 1698 char c; 1699 int braclev; 1700 int rcode; 1701 int i; 1702 char hostbuf[BUFSIZ]; 1703 char *mxhosts[MAXMXHOSTS + 1]; 1704 1705 /* check to see if this is really a route-addr */ 1706 if (*addr != '<' || addr[1] != '@' || addr[strlen(addr) - 1] != '>') 1707 return false; 1708 1709 /* 1710 ** Can't simply find the first ':' is the address might be in the 1711 ** form: "<@[IPv6:::1]:user@host>" and the first ':' in inside 1712 ** the IPv6 address. 1713 */ 1714 1715 start = addr; 1716 braclev = 0; 1717 while (*start != '\0') 1718 { 1719 if (*start == ':' && braclev <= 0) 1720 break; 1721 else if (*start == '[') 1722 braclev++; 1723 else if (*start == ']' && braclev > 0) 1724 braclev--; 1725 start++; 1726 } 1727 if (braclev > 0 || *start != ':') 1728 return false; 1729 1730 at = strrchr(addr, '@'); 1731 if (at == NULL || at < start) 1732 return false; 1733 1734 /* slice off the angle brackets */ 1735 i = strlen(at + 1); 1736 if (i >= sizeof(hostbuf)) 1737 return false; 1738 (void) sm_strlcpy(hostbuf, at + 1, sizeof(hostbuf)); 1739 hostbuf[i - 1] = '\0'; 1740 1741 while (start != NULL) 1742 { 1743 if (getmxrr(hostbuf, mxhosts, NULL, false, 1744 &rcode, true, NULL) > 0) 1745 { 1746 (void) sm_strlcpy(addr + 1, start + 1, 1747 strlen(addr) - 1); 1748 return true; 1749 } 1750 c = *start; 1751 *start = '\0'; 1752 comma = strrchr(addr, ','); 1753 if (comma != NULL && comma[1] == '@' && 1754 strlen(comma + 2) < sizeof(hostbuf)) 1755 (void) sm_strlcpy(hostbuf, comma + 2, sizeof(hostbuf)); 1756 else 1757 comma = NULL; 1758 *start = c; 1759 start = comma; 1760 } 1761 #endif /* NAMED_BIND */ 1762 return false; 1763 } 1764