1 /* 2 * Copyright (c) 1998-2006 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 #include <sendmail.h> 15 16 SM_RCSID("@(#)$Id: collect.c,v 8.280 2006/11/29 00:20:40 ca Exp $") 17 18 static void eatfrom __P((char *volatile, ENVELOPE *)); 19 static void collect_doheader __P((ENVELOPE *)); 20 static SM_FILE_T *collect_dfopen __P((ENVELOPE *)); 21 static SM_FILE_T *collect_eoh __P((ENVELOPE *, int, int)); 22 23 /* 24 ** COLLECT_EOH -- end-of-header processing in collect() 25 ** 26 ** Called by collect() when it encounters the blank line 27 ** separating the header from the message body, or when it 28 ** encounters EOF in a message that contains only a header. 29 ** 30 ** Parameters: 31 ** e -- envelope 32 ** numhdrs -- number of headers 33 ** hdrslen -- length of headers 34 ** 35 ** Results: 36 ** NULL, or handle to open data file 37 ** 38 ** Side Effects: 39 ** end-of-header check ruleset is invoked. 40 ** envelope state is updated. 41 ** headers may be added and deleted. 42 ** selects the queue. 43 ** opens the data file. 44 */ 45 46 static SM_FILE_T * 47 collect_eoh(e, numhdrs, hdrslen) 48 ENVELOPE *e; 49 int numhdrs; 50 int hdrslen; 51 { 52 char hnum[16]; 53 char hsize[16]; 54 55 /* call the end-of-header check ruleset */ 56 (void) sm_snprintf(hnum, sizeof(hnum), "%d", numhdrs); 57 (void) sm_snprintf(hsize, sizeof(hsize), "%d", hdrslen); 58 if (tTd(30, 10)) 59 sm_dprintf("collect: rscheck(\"check_eoh\", \"%s $| %s\")\n", 60 hnum, hsize); 61 (void) rscheck("check_eoh", hnum, hsize, e, RSF_UNSTRUCTURED|RSF_COUNT, 62 3, NULL, e->e_id, NULL); 63 64 /* 65 ** Process the header, 66 ** select the queue, open the data file. 67 */ 68 69 collect_doheader(e); 70 return collect_dfopen(e); 71 } 72 73 /* 74 ** COLLECT_DOHEADER -- process header in collect() 75 ** 76 ** Called by collect() after it has finished parsing the header, 77 ** but before it selects the queue and creates the data file. 78 ** The results of processing the header will affect queue selection. 79 ** 80 ** Parameters: 81 ** e -- envelope 82 ** 83 ** Results: 84 ** none. 85 ** 86 ** Side Effects: 87 ** envelope state is updated. 88 ** headers may be added and deleted. 89 */ 90 91 static void 92 collect_doheader(e) 93 ENVELOPE *e; 94 { 95 /* 96 ** Find out some information from the headers. 97 ** Examples are who is the from person & the date. 98 */ 99 100 eatheader(e, true, false); 101 102 if (GrabTo && e->e_sendqueue == NULL) 103 usrerr("No recipient addresses found in header"); 104 105 /* 106 ** If we have a Return-Receipt-To:, turn it into a DSN. 107 */ 108 109 if (RrtImpliesDsn && hvalue("return-receipt-to", e->e_header) != NULL) 110 { 111 ADDRESS *q; 112 113 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 114 if (!bitset(QHASNOTIFY, q->q_flags)) 115 q->q_flags |= QHASNOTIFY|QPINGONSUCCESS; 116 } 117 118 /* 119 ** Add an appropriate recipient line if we have none. 120 */ 121 122 if (hvalue("to", e->e_header) != NULL || 123 hvalue("cc", e->e_header) != NULL || 124 hvalue("apparently-to", e->e_header) != NULL) 125 { 126 /* have a valid recipient header -- delete Bcc: headers */ 127 e->e_flags |= EF_DELETE_BCC; 128 } 129 else if (hvalue("bcc", e->e_header) == NULL) 130 { 131 /* no valid recipient headers */ 132 register ADDRESS *q; 133 char *hdr = NULL; 134 135 /* create a recipient field */ 136 switch (NoRecipientAction) 137 { 138 case NRA_ADD_APPARENTLY_TO: 139 hdr = "Apparently-To"; 140 break; 141 142 case NRA_ADD_TO: 143 hdr = "To"; 144 break; 145 146 case NRA_ADD_BCC: 147 addheader("Bcc", " ", 0, e, true); 148 break; 149 150 case NRA_ADD_TO_UNDISCLOSED: 151 addheader("To", "undisclosed-recipients:;", 0, e, true); 152 break; 153 } 154 155 if (hdr != NULL) 156 { 157 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 158 { 159 if (q->q_alias != NULL) 160 continue; 161 if (tTd(30, 3)) 162 sm_dprintf("Adding %s: %s\n", 163 hdr, q->q_paddr); 164 addheader(hdr, q->q_paddr, 0, e, true); 165 } 166 } 167 } 168 } 169 170 /* 171 ** COLLECT_DFOPEN -- open the message data file 172 ** 173 ** Called by collect() after it has finished processing the header. 174 ** Queue selection occurs at this point, possibly based on the 175 ** envelope's recipient list and on header information. 176 ** 177 ** Parameters: 178 ** e -- envelope 179 ** 180 ** Results: 181 ** NULL, or a pointer to an open data file, 182 ** into which the message body will be written by collect(). 183 ** 184 ** Side Effects: 185 ** Calls syserr, sets EF_FATALERRS and returns NULL 186 ** if there is insufficient disk space. 187 ** Aborts process if data file could not be opened. 188 ** Otherwise, the queue is selected, 189 ** e->e_{dfino,dfdev,msgsize,flags} are updated, 190 ** and a pointer to an open data file is returned. 191 */ 192 193 static SM_FILE_T * 194 collect_dfopen(e) 195 ENVELOPE *e; 196 { 197 MODE_T oldumask = 0; 198 int dfd; 199 struct stat stbuf; 200 SM_FILE_T *df; 201 char *dfname; 202 203 if (!setnewqueue(e)) 204 return NULL; 205 206 dfname = queuename(e, DATAFL_LETTER); 207 if (bitset(S_IWGRP, QueueFileMode)) 208 oldumask = umask(002); 209 df = bfopen(dfname, QueueFileMode, DataFileBufferSize, 210 SFF_OPENASROOT); 211 if (bitset(S_IWGRP, QueueFileMode)) 212 (void) umask(oldumask); 213 if (df == NULL) 214 { 215 syserr("@Cannot create %s", dfname); 216 e->e_flags |= EF_NO_BODY_RETN; 217 flush_errors(true); 218 finis(false, true, ExitStat); 219 /* NOTREACHED */ 220 } 221 dfd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL); 222 if (dfd < 0 || fstat(dfd, &stbuf) < 0) 223 e->e_dfino = -1; 224 else 225 { 226 e->e_dfdev = stbuf.st_dev; 227 e->e_dfino = stbuf.st_ino; 228 } 229 e->e_flags |= EF_HAS_DF; 230 return df; 231 } 232 233 /* 234 ** COLLECT -- read & parse message header & make temp file. 235 ** 236 ** Creates a temporary file name and copies the standard 237 ** input to that file. Leading UNIX-style "From" lines are 238 ** stripped off (after important information is extracted). 239 ** 240 ** Parameters: 241 ** fp -- file to read. 242 ** smtpmode -- if set, we are running SMTP: give an RFC821 243 ** style message to say we are ready to collect 244 ** input, and never ignore a single dot to mean 245 ** end of message. 246 ** hdrp -- the location to stash the header. 247 ** e -- the current envelope. 248 ** rsetsize -- reset e_msgsize? 249 ** 250 ** Returns: 251 ** none. 252 ** 253 ** Side Effects: 254 ** If successful, 255 ** - Data file is created and filled, and e->e_dfp is set. 256 ** - The from person may be set. 257 ** If the "enough disk space" check fails, 258 ** - syserr is called. 259 ** - e->e_dfp is NULL. 260 ** - e->e_flags & EF_FATALERRS is set. 261 ** - collect() returns. 262 ** If data file cannot be created, the process is terminated. 263 */ 264 265 /* values for input state machine */ 266 #define IS_NORM 0 /* middle of line */ 267 #define IS_BOL 1 /* beginning of line */ 268 #define IS_DOT 2 /* read a dot at beginning of line */ 269 #define IS_DOTCR 3 /* read ".\r" at beginning of line */ 270 #define IS_CR 4 /* read a carriage return */ 271 272 /* values for message state machine */ 273 #define MS_UFROM 0 /* reading Unix from line */ 274 #define MS_HEADER 1 /* reading message header */ 275 #define MS_BODY 2 /* reading message body */ 276 #define MS_DISCARD 3 /* discarding rest of message */ 277 278 void 279 collect(fp, smtpmode, hdrp, e, rsetsize) 280 SM_FILE_T *fp; 281 bool smtpmode; 282 HDR **hdrp; 283 register ENVELOPE *e; 284 bool rsetsize; 285 { 286 register SM_FILE_T *df; 287 bool ignrdot; 288 int dbto; 289 register char *bp; 290 int c; 291 bool inputerr; 292 bool headeronly; 293 char *buf; 294 int buflen; 295 int istate; 296 int mstate; 297 int hdrslen; 298 int numhdrs; 299 int afd; 300 unsigned char *pbp; 301 unsigned char peekbuf[8]; 302 char bufbuf[MAXLINE]; 303 304 df = NULL; 305 ignrdot = smtpmode ? false : IgnrDot; 306 307 /* timeout for I/O functions is in milliseconds */ 308 dbto = smtpmode ? ((int) TimeOuts.to_datablock * 1000) 309 : SM_TIME_FOREVER; 310 sm_io_setinfo(fp, SM_IO_WHAT_TIMEOUT, &dbto); 311 c = SM_IO_EOF; 312 inputerr = false; 313 headeronly = hdrp != NULL; 314 hdrslen = 0; 315 numhdrs = 0; 316 HasEightBits = false; 317 buf = bp = bufbuf; 318 buflen = sizeof(bufbuf); 319 pbp = peekbuf; 320 istate = IS_BOL; 321 mstate = SaveFrom ? MS_HEADER : MS_UFROM; 322 323 /* 324 ** Tell ARPANET to go ahead. 325 */ 326 327 if (smtpmode) 328 message("354 Enter mail, end with \".\" on a line by itself"); 329 330 /* simulate an I/O timeout when used as sink */ 331 if (tTd(83, 101)) 332 sleep(319); 333 334 if (tTd(30, 2)) 335 sm_dprintf("collect\n"); 336 337 /* 338 ** Read the message. 339 ** 340 ** This is done using two interleaved state machines. 341 ** The input state machine is looking for things like 342 ** hidden dots; the message state machine is handling 343 ** the larger picture (e.g., header versus body). 344 */ 345 346 if (rsetsize) 347 e->e_msgsize = 0; 348 for (;;) 349 { 350 if (tTd(30, 35)) 351 sm_dprintf("top, istate=%d, mstate=%d\n", istate, 352 mstate); 353 for (;;) 354 { 355 if (pbp > peekbuf) 356 c = *--pbp; 357 else 358 { 359 while (!sm_io_eof(fp) && !sm_io_error(fp)) 360 { 361 errno = 0; 362 c = sm_io_getc(fp, SM_TIME_DEFAULT); 363 if (c == SM_IO_EOF && errno == EINTR) 364 { 365 /* Interrupted, retry */ 366 sm_io_clearerr(fp); 367 continue; 368 } 369 370 /* timeout? */ 371 if (c == SM_IO_EOF && errno == EAGAIN 372 && smtpmode) 373 { 374 /* 375 ** Override e_message in 376 ** usrerr() as this is the 377 ** reason for failure that 378 ** should be logged for 379 ** undelivered recipients. 380 */ 381 382 e->e_message = NULL; 383 errno = 0; 384 inputerr = true; 385 goto readabort; 386 } 387 break; 388 } 389 if (TrafficLogFile != NULL && !headeronly) 390 { 391 if (istate == IS_BOL) 392 (void) sm_io_fprintf(TrafficLogFile, 393 SM_TIME_DEFAULT, 394 "%05d <<< ", 395 (int) CurrentPid); 396 if (c == SM_IO_EOF) 397 (void) sm_io_fprintf(TrafficLogFile, 398 SM_TIME_DEFAULT, 399 "[EOF]\n"); 400 else 401 (void) sm_io_putc(TrafficLogFile, 402 SM_TIME_DEFAULT, 403 c); 404 } 405 if (c == SM_IO_EOF) 406 goto readerr; 407 if (SevenBitInput) 408 c &= 0x7f; 409 else 410 HasEightBits |= bitset(0x80, c); 411 } 412 if (tTd(30, 94)) 413 sm_dprintf("istate=%d, c=%c (0x%x)\n", 414 istate, (char) c, c); 415 switch (istate) 416 { 417 case IS_BOL: 418 if (c == '.') 419 { 420 istate = IS_DOT; 421 continue; 422 } 423 break; 424 425 case IS_DOT: 426 if (c == '\n' && !ignrdot && 427 !bitset(EF_NL_NOT_EOL, e->e_flags)) 428 goto readerr; 429 else if (c == '\r' && 430 !bitset(EF_CRLF_NOT_EOL, e->e_flags)) 431 { 432 istate = IS_DOTCR; 433 continue; 434 } 435 else if (ignrdot || 436 (c != '.' && 437 OpMode != MD_SMTP && 438 OpMode != MD_DAEMON && 439 OpMode != MD_ARPAFTP)) 440 441 { 442 SM_ASSERT(pbp < peekbuf + 443 sizeof(peekbuf)); 444 *pbp++ = c; 445 c = '.'; 446 } 447 break; 448 449 case IS_DOTCR: 450 if (c == '\n' && !ignrdot) 451 goto readerr; 452 else 453 { 454 /* push back the ".\rx" */ 455 SM_ASSERT(pbp < peekbuf + 456 sizeof(peekbuf)); 457 *pbp++ = c; 458 if (OpMode != MD_SMTP && 459 OpMode != MD_DAEMON && 460 OpMode != MD_ARPAFTP) 461 { 462 SM_ASSERT(pbp < peekbuf + 463 sizeof(peekbuf)); 464 *pbp++ = '\r'; 465 c = '.'; 466 } 467 else 468 c = '\r'; 469 } 470 break; 471 472 case IS_CR: 473 if (c == '\n') 474 istate = IS_BOL; 475 else 476 { 477 (void) sm_io_ungetc(fp, SM_TIME_DEFAULT, 478 c); 479 c = '\r'; 480 istate = IS_NORM; 481 } 482 goto bufferchar; 483 } 484 485 if (c == '\r' && !bitset(EF_CRLF_NOT_EOL, e->e_flags)) 486 { 487 istate = IS_CR; 488 continue; 489 } 490 else if (c == '\n' && !bitset(EF_NL_NOT_EOL, 491 e->e_flags)) 492 istate = IS_BOL; 493 else 494 istate = IS_NORM; 495 496 bufferchar: 497 if (!headeronly) 498 { 499 /* no overflow? */ 500 if (e->e_msgsize >= 0) 501 { 502 e->e_msgsize++; 503 if (MaxMessageSize > 0 && 504 !bitset(EF_TOOBIG, e->e_flags) && 505 e->e_msgsize > MaxMessageSize) 506 e->e_flags |= EF_TOOBIG; 507 } 508 } 509 switch (mstate) 510 { 511 case MS_BODY: 512 /* just put the character out */ 513 if (!bitset(EF_TOOBIG, e->e_flags)) 514 (void) sm_io_putc(df, SM_TIME_DEFAULT, 515 c); 516 517 /* FALLTHROUGH */ 518 519 case MS_DISCARD: 520 continue; 521 } 522 523 SM_ASSERT(mstate == MS_UFROM || mstate == MS_HEADER); 524 525 /* header -- buffer up */ 526 if (bp >= &buf[buflen - 2]) 527 { 528 char *obuf; 529 530 /* out of space for header */ 531 obuf = buf; 532 if (buflen < MEMCHUNKSIZE) 533 buflen *= 2; 534 else 535 buflen += MEMCHUNKSIZE; 536 if (buflen <= 0) 537 { 538 sm_syslog(LOG_NOTICE, e->e_id, 539 "header overflow from %s during message collect", 540 CURHOSTNAME); 541 errno = 0; 542 e->e_flags |= EF_CLRQUEUE; 543 e->e_status = "5.6.0"; 544 usrerrenh(e->e_status, 545 "552 Headers too large"); 546 goto discard; 547 } 548 buf = xalloc(buflen); 549 memmove(buf, obuf, bp - obuf); 550 bp = &buf[bp - obuf]; 551 if (obuf != bufbuf) 552 sm_free(obuf); /* XXX */ 553 } 554 555 if (c != '\0') 556 { 557 *bp++ = c; 558 ++hdrslen; 559 if (!headeronly && 560 MaxHeadersLength > 0 && 561 hdrslen > MaxHeadersLength) 562 { 563 sm_syslog(LOG_NOTICE, e->e_id, 564 "headers too large (%d max) from %s during message collect", 565 MaxHeadersLength, 566 CURHOSTNAME); 567 errno = 0; 568 e->e_flags |= EF_CLRQUEUE; 569 e->e_status = "5.6.0"; 570 usrerrenh(e->e_status, 571 "552 Headers too large (%d max)", 572 MaxHeadersLength); 573 discard: 574 mstate = MS_DISCARD; 575 } 576 } 577 if (istate == IS_BOL) 578 break; 579 } 580 *bp = '\0'; 581 582 nextstate: 583 if (tTd(30, 35)) 584 sm_dprintf("nextstate, istate=%d, mstate=%d, line=\"%s\"\n", 585 istate, mstate, buf); 586 switch (mstate) 587 { 588 case MS_UFROM: 589 mstate = MS_HEADER; 590 #ifndef NOTUNIX 591 if (strncmp(buf, "From ", 5) == 0) 592 { 593 bp = buf; 594 eatfrom(buf, e); 595 continue; 596 } 597 #endif /* ! NOTUNIX */ 598 /* FALLTHROUGH */ 599 600 case MS_HEADER: 601 if (!isheader(buf)) 602 { 603 mstate = MS_BODY; 604 goto nextstate; 605 } 606 607 /* check for possible continuation line */ 608 do 609 { 610 sm_io_clearerr(fp); 611 errno = 0; 612 c = sm_io_getc(fp, SM_TIME_DEFAULT); 613 614 /* timeout? */ 615 if (c == SM_IO_EOF && errno == EAGAIN 616 && smtpmode) 617 { 618 /* 619 ** Override e_message in 620 ** usrerr() as this is the 621 ** reason for failure that 622 ** should be logged for 623 ** undelivered recipients. 624 */ 625 626 e->e_message = NULL; 627 errno = 0; 628 inputerr = true; 629 goto readabort; 630 } 631 } while (c == SM_IO_EOF && errno == EINTR); 632 if (c != SM_IO_EOF) 633 (void) sm_io_ungetc(fp, SM_TIME_DEFAULT, c); 634 if (c == ' ' || c == '\t') 635 { 636 /* yep -- defer this */ 637 continue; 638 } 639 640 SM_ASSERT(bp > buf); 641 642 /* guaranteed by isheader(buf) */ 643 SM_ASSERT(*(bp - 1) != '\n' || bp > buf + 1); 644 645 /* trim off trailing CRLF or NL */ 646 if (*--bp != '\n' || *--bp != '\r') 647 bp++; 648 *bp = '\0'; 649 650 if (bitset(H_EOH, chompheader(buf, 651 CHHDR_CHECK | CHHDR_USER, 652 hdrp, e))) 653 { 654 mstate = MS_BODY; 655 goto nextstate; 656 } 657 numhdrs++; 658 break; 659 660 case MS_BODY: 661 if (tTd(30, 1)) 662 sm_dprintf("EOH\n"); 663 664 if (headeronly) 665 goto readerr; 666 667 df = collect_eoh(e, numhdrs, hdrslen); 668 if (df == NULL) 669 e->e_flags |= EF_TOOBIG; 670 671 bp = buf; 672 673 /* toss blank line */ 674 if ((!bitset(EF_CRLF_NOT_EOL, e->e_flags) && 675 bp[0] == '\r' && bp[1] == '\n') || 676 (!bitset(EF_NL_NOT_EOL, e->e_flags) && 677 bp[0] == '\n')) 678 { 679 break; 680 } 681 682 /* if not a blank separator, write it out */ 683 if (!bitset(EF_TOOBIG, e->e_flags)) 684 { 685 while (*bp != '\0') 686 (void) sm_io_putc(df, SM_TIME_DEFAULT, 687 *bp++); 688 } 689 break; 690 } 691 bp = buf; 692 } 693 694 readerr: 695 if ((sm_io_eof(fp) && smtpmode) || sm_io_error(fp)) 696 { 697 const char *errmsg; 698 699 if (sm_io_eof(fp)) 700 errmsg = "unexpected close"; 701 else 702 errmsg = sm_errstring(errno); 703 if (tTd(30, 1)) 704 sm_dprintf("collect: premature EOM: %s\n", errmsg); 705 if (LogLevel > 1) 706 sm_syslog(LOG_WARNING, e->e_id, 707 "collect: premature EOM: %s", errmsg); 708 inputerr = true; 709 } 710 711 if (headeronly) 712 return; 713 714 if (mstate != MS_BODY) 715 { 716 /* no body or discard, so we never opened the data file */ 717 SM_ASSERT(df == NULL); 718 df = collect_eoh(e, numhdrs, hdrslen); 719 } 720 721 if (df == NULL) 722 { 723 /* skip next few clauses */ 724 /* EMPTY */ 725 } 726 else if (sm_io_flush(df, SM_TIME_DEFAULT) != 0 || sm_io_error(df)) 727 { 728 dferror(df, "sm_io_flush||sm_io_error", e); 729 flush_errors(true); 730 finis(true, true, ExitStat); 731 /* NOTREACHED */ 732 } 733 else if (SuperSafe == SAFE_NO || 734 SuperSafe == SAFE_INTERACTIVE || 735 (SuperSafe == SAFE_REALLY_POSTMILTER && smtpmode)) 736 { 737 /* skip next few clauses */ 738 /* EMPTY */ 739 /* Note: updfs() is not called in this case! */ 740 } 741 else if (sm_io_setinfo(df, SM_BF_COMMIT, NULL) < 0 && errno != EINVAL) 742 { 743 int save_errno = errno; 744 745 if (save_errno == EEXIST) 746 { 747 char *dfile; 748 struct stat st; 749 int dfd; 750 751 dfile = queuename(e, DATAFL_LETTER); 752 if (stat(dfile, &st) < 0) 753 st.st_size = -1; 754 errno = EEXIST; 755 syserr("@collect: bfcommit(%s): already on disk, size=%ld", 756 dfile, (long) st.st_size); 757 dfd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL); 758 if (dfd >= 0) 759 dumpfd(dfd, true, true); 760 } 761 errno = save_errno; 762 dferror(df, "bfcommit", e); 763 flush_errors(true); 764 finis(save_errno != EEXIST, true, ExitStat); 765 } 766 else if ((afd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL)) < 0) 767 { 768 dferror(df, "sm_io_getinfo", e); 769 flush_errors(true); 770 finis(true, true, ExitStat); 771 /* NOTREACHED */ 772 } 773 else if (fsync(afd) < 0) 774 { 775 dferror(df, "fsync", e); 776 flush_errors(true); 777 finis(true, true, ExitStat); 778 /* NOTREACHED */ 779 } 780 else if (sm_io_close(df, SM_TIME_DEFAULT) < 0) 781 { 782 dferror(df, "sm_io_close", e); 783 flush_errors(true); 784 finis(true, true, ExitStat); 785 /* NOTREACHED */ 786 } 787 else 788 { 789 /* everything is happily flushed to disk */ 790 df = NULL; 791 792 /* remove from available space in filesystem */ 793 updfs(e, 0, 1, "collect"); 794 } 795 796 /* An EOF when running SMTP is an error */ 797 readabort: 798 if (inputerr && (OpMode == MD_SMTP || OpMode == MD_DAEMON)) 799 { 800 char *host; 801 char *problem; 802 ADDRESS *q; 803 804 host = RealHostName; 805 if (host == NULL) 806 host = "localhost"; 807 808 if (sm_io_eof(fp)) 809 problem = "unexpected close"; 810 else if (sm_io_error(fp)) 811 problem = "I/O error"; 812 else 813 problem = "read timeout"; 814 if (LogLevel > 0 && sm_io_eof(fp)) 815 sm_syslog(LOG_NOTICE, e->e_id, 816 "collect: %s on connection from %.100s, sender=%s", 817 problem, host, 818 shortenstring(e->e_from.q_paddr, MAXSHORTSTR)); 819 if (sm_io_eof(fp)) 820 usrerr("421 4.4.1 collect: %s on connection from %s, from=%s", 821 problem, host, 822 shortenstring(e->e_from.q_paddr, MAXSHORTSTR)); 823 else 824 syserr("421 4.4.1 collect: %s on connection from %s, from=%s", 825 problem, host, 826 shortenstring(e->e_from.q_paddr, MAXSHORTSTR)); 827 flush_errors(true); 828 829 /* don't return an error indication */ 830 e->e_to = NULL; 831 e->e_flags &= ~EF_FATALERRS; 832 e->e_flags |= EF_CLRQUEUE; 833 834 /* Don't send any message notification to sender */ 835 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 836 { 837 if (QS_IS_DEAD(q->q_state)) 838 continue; 839 q->q_state = QS_FATALERR; 840 } 841 842 (void) sm_io_close(df, SM_TIME_DEFAULT); 843 df = NULL; 844 finis(true, true, ExitStat); 845 /* NOTREACHED */ 846 } 847 848 /* Log collection information. */ 849 if (bitset(EF_LOGSENDER, e->e_flags) && LogLevel > 4) 850 { 851 logsender(e, e->e_msgid); 852 e->e_flags &= ~EF_LOGSENDER; 853 } 854 855 /* check for message too large */ 856 if (bitset(EF_TOOBIG, e->e_flags)) 857 { 858 e->e_flags |= EF_NO_BODY_RETN|EF_CLRQUEUE; 859 if (!bitset(EF_FATALERRS, e->e_flags)) 860 { 861 e->e_status = "5.2.3"; 862 usrerrenh(e->e_status, 863 "552 Message exceeds maximum fixed size (%ld)", 864 MaxMessageSize); 865 if (LogLevel > 6) 866 sm_syslog(LOG_NOTICE, e->e_id, 867 "message size (%ld) exceeds maximum (%ld)", 868 e->e_msgsize, MaxMessageSize); 869 } 870 } 871 872 /* check for illegal 8-bit data */ 873 if (HasEightBits) 874 { 875 e->e_flags |= EF_HAS8BIT; 876 if (!bitset(MM_PASS8BIT|MM_MIME8BIT, MimeMode) && 877 !bitset(EF_IS_MIME, e->e_flags)) 878 { 879 e->e_status = "5.6.1"; 880 usrerrenh(e->e_status, "554 Eight bit data not allowed"); 881 } 882 } 883 else 884 { 885 /* if it claimed to be 8 bits, well, it lied.... */ 886 if (e->e_bodytype != NULL && 887 sm_strcasecmp(e->e_bodytype, "8BITMIME") == 0) 888 e->e_bodytype = "7BIT"; 889 } 890 891 if (SuperSafe == SAFE_REALLY && !bitset(EF_FATALERRS, e->e_flags)) 892 { 893 char *dfname = queuename(e, DATAFL_LETTER); 894 if ((e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, dfname, 895 SM_IO_RDONLY_B, NULL)) == NULL) 896 { 897 /* we haven't acked receipt yet, so just chuck this */ 898 syserr("@Cannot reopen %s", dfname); 899 finis(true, true, ExitStat); 900 /* NOTREACHED */ 901 } 902 } 903 else 904 e->e_dfp = df; 905 906 /* collect statistics */ 907 if (OpMode != MD_VERIFY) 908 { 909 /* 910 ** Recalculate e_msgpriority, it is done at in eatheader() 911 ** which is called (in 8.12) after the header is collected, 912 ** hence e_msgsize is (most likely) incorrect. 913 */ 914 915 e->e_msgpriority = e->e_msgsize 916 - e->e_class * WkClassFact 917 + e->e_nrcpts * WkRecipFact; 918 markstats(e, (ADDRESS *) NULL, STATS_NORMAL); 919 } 920 } 921 922 /* 923 ** DFERROR -- signal error on writing the data file. 924 ** 925 ** Called by collect(). Collect() always terminates the process 926 ** immediately after calling dferror(), which means that the SMTP 927 ** session will be terminated, which means that any error message 928 ** issued by dferror must be a 421 error, as per RFC 821. 929 ** 930 ** Parameters: 931 ** df -- the file pointer for the data file. 932 ** msg -- detailed message. 933 ** e -- the current envelope. 934 ** 935 ** Returns: 936 ** none. 937 ** 938 ** Side Effects: 939 ** Gives an error message. 940 ** Arranges for following output to go elsewhere. 941 */ 942 943 void 944 dferror(df, msg, e) 945 SM_FILE_T *volatile df; 946 char *msg; 947 register ENVELOPE *e; 948 { 949 char *dfname; 950 951 dfname = queuename(e, DATAFL_LETTER); 952 setstat(EX_IOERR); 953 if (errno == ENOSPC) 954 { 955 #if STAT64 > 0 956 struct stat64 st; 957 #else /* STAT64 > 0 */ 958 struct stat st; 959 #endif /* STAT64 > 0 */ 960 long avail; 961 long bsize; 962 963 e->e_flags |= EF_NO_BODY_RETN; 964 965 if ( 966 #if STAT64 > 0 967 fstat64(sm_io_getinfo(df, SM_IO_WHAT_FD, NULL), &st) 968 #else /* STAT64 > 0 */ 969 fstat(sm_io_getinfo(df, SM_IO_WHAT_FD, NULL), &st) 970 #endif /* STAT64 > 0 */ 971 < 0) 972 st.st_size = 0; 973 (void) sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, dfname, 974 SM_IO_WRONLY_B, NULL, df); 975 if (st.st_size <= 0) 976 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 977 "\n*** Mail could not be accepted"); 978 else 979 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 980 "\n*** Mail of at least %llu bytes could not be accepted\n", 981 (ULONGLONG_T) st.st_size); 982 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 983 "*** at %s due to lack of disk space for temp file.\n", 984 MyHostName); 985 avail = freediskspace(qid_printqueue(e->e_qgrp, e->e_qdir), 986 &bsize); 987 if (avail > 0) 988 { 989 if (bsize > 1024) 990 avail *= bsize / 1024; 991 else if (bsize < 1024) 992 avail /= 1024 / bsize; 993 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 994 "*** Currently, %ld kilobytes are available for mail temp files.\n", 995 avail); 996 } 997 #if 0 998 /* Wrong response code; should be 421. */ 999 e->e_status = "4.3.1"; 1000 usrerrenh(e->e_status, "452 Out of disk space for temp file"); 1001 #else /* 0 */ 1002 syserr("421 4.3.1 Out of disk space for temp file"); 1003 #endif /* 0 */ 1004 } 1005 else 1006 syserr("421 4.3.0 collect: Cannot write %s (%s, uid=%d, gid=%d)", 1007 dfname, msg, (int) geteuid(), (int) getegid()); 1008 if (sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, SM_PATH_DEVNULL, 1009 SM_IO_WRONLY, NULL, df) == NULL) 1010 sm_syslog(LOG_ERR, e->e_id, 1011 "dferror: sm_io_reopen(\"/dev/null\") failed: %s", 1012 sm_errstring(errno)); 1013 } 1014 /* 1015 ** EATFROM -- chew up a UNIX style from line and process 1016 ** 1017 ** This does indeed make some assumptions about the format 1018 ** of UNIX messages. 1019 ** 1020 ** Parameters: 1021 ** fm -- the from line. 1022 ** e -- envelope 1023 ** 1024 ** Returns: 1025 ** none. 1026 ** 1027 ** Side Effects: 1028 ** extracts what information it can from the header, 1029 ** such as the date. 1030 */ 1031 1032 #ifndef NOTUNIX 1033 1034 static char *DowList[] = 1035 { 1036 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL 1037 }; 1038 1039 static char *MonthList[] = 1040 { 1041 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 1042 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", 1043 NULL 1044 }; 1045 1046 static void 1047 eatfrom(fm, e) 1048 char *volatile fm; 1049 register ENVELOPE *e; 1050 { 1051 register char *p; 1052 register char **dt; 1053 1054 if (tTd(30, 2)) 1055 sm_dprintf("eatfrom(%s)\n", fm); 1056 1057 /* find the date part */ 1058 p = fm; 1059 while (*p != '\0') 1060 { 1061 /* skip a word */ 1062 while (*p != '\0' && *p != ' ') 1063 p++; 1064 while (*p == ' ') 1065 p++; 1066 if (strlen(p) < 17) 1067 { 1068 /* no room for the date */ 1069 return; 1070 } 1071 if (!(isascii(*p) && isupper(*p)) || 1072 p[3] != ' ' || p[13] != ':' || p[16] != ':') 1073 continue; 1074 1075 /* we have a possible date */ 1076 for (dt = DowList; *dt != NULL; dt++) 1077 if (strncmp(*dt, p, 3) == 0) 1078 break; 1079 if (*dt == NULL) 1080 continue; 1081 1082 for (dt = MonthList; *dt != NULL; dt++) 1083 { 1084 if (strncmp(*dt, &p[4], 3) == 0) 1085 break; 1086 } 1087 if (*dt != NULL) 1088 break; 1089 } 1090 1091 if (*p != '\0') 1092 { 1093 char *q, buf[25]; 1094 1095 /* we have found a date */ 1096 (void) sm_strlcpy(buf, p, sizeof(buf)); 1097 q = arpadate(buf); 1098 macdefine(&e->e_macro, A_TEMP, 'a', q); 1099 } 1100 } 1101 #endif /* ! NOTUNIX */ 1102