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 #pragma ident "%Z%%M% %I% %E% SMI" 15 16 #include <sendmail.h> 17 18 SM_RCSID("@(#)$Id: collect.c,v 8.280 2006/11/29 00:20:40 ca Exp $") 19 20 static void eatfrom __P((char *volatile, ENVELOPE *)); 21 static void collect_doheader __P((ENVELOPE *)); 22 static SM_FILE_T *collect_dfopen __P((ENVELOPE *)); 23 static SM_FILE_T *collect_eoh __P((ENVELOPE *, int, int)); 24 25 /* 26 ** COLLECT_EOH -- end-of-header processing in collect() 27 ** 28 ** Called by collect() when it encounters the blank line 29 ** separating the header from the message body, or when it 30 ** encounters EOF in a message that contains only a header. 31 ** 32 ** Parameters: 33 ** e -- envelope 34 ** numhdrs -- number of headers 35 ** hdrslen -- length of headers 36 ** 37 ** Results: 38 ** NULL, or handle to open data file 39 ** 40 ** Side Effects: 41 ** end-of-header check ruleset is invoked. 42 ** envelope state is updated. 43 ** headers may be added and deleted. 44 ** selects the queue. 45 ** opens the data file. 46 */ 47 48 static SM_FILE_T * 49 collect_eoh(e, numhdrs, hdrslen) 50 ENVELOPE *e; 51 int numhdrs; 52 int hdrslen; 53 { 54 char hnum[16]; 55 char hsize[16]; 56 57 /* call the end-of-header check ruleset */ 58 (void) sm_snprintf(hnum, sizeof(hnum), "%d", numhdrs); 59 (void) sm_snprintf(hsize, sizeof(hsize), "%d", hdrslen); 60 if (tTd(30, 10)) 61 sm_dprintf("collect: rscheck(\"check_eoh\", \"%s $| %s\")\n", 62 hnum, hsize); 63 (void) rscheck("check_eoh", hnum, hsize, e, RSF_UNSTRUCTURED|RSF_COUNT, 64 3, NULL, e->e_id, NULL); 65 66 /* 67 ** Process the header, 68 ** select the queue, open the data file. 69 */ 70 71 collect_doheader(e); 72 return collect_dfopen(e); 73 } 74 75 /* 76 ** COLLECT_DOHEADER -- process header in collect() 77 ** 78 ** Called by collect() after it has finished parsing the header, 79 ** but before it selects the queue and creates the data file. 80 ** The results of processing the header will affect queue selection. 81 ** 82 ** Parameters: 83 ** e -- envelope 84 ** 85 ** Results: 86 ** none. 87 ** 88 ** Side Effects: 89 ** envelope state is updated. 90 ** headers may be added and deleted. 91 */ 92 93 static void 94 collect_doheader(e) 95 ENVELOPE *e; 96 { 97 /* 98 ** Find out some information from the headers. 99 ** Examples are who is the from person & the date. 100 */ 101 102 eatheader(e, true, false); 103 104 if (GrabTo && e->e_sendqueue == NULL) 105 usrerr("No recipient addresses found in header"); 106 107 /* 108 ** If we have a Return-Receipt-To:, turn it into a DSN. 109 */ 110 111 if (RrtImpliesDsn && hvalue("return-receipt-to", e->e_header) != NULL) 112 { 113 ADDRESS *q; 114 115 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 116 if (!bitset(QHASNOTIFY, q->q_flags)) 117 q->q_flags |= QHASNOTIFY|QPINGONSUCCESS; 118 } 119 120 /* 121 ** Add an appropriate recipient line if we have none. 122 */ 123 124 if (hvalue("to", e->e_header) != NULL || 125 hvalue("cc", e->e_header) != NULL || 126 hvalue("apparently-to", e->e_header) != NULL) 127 { 128 /* have a valid recipient header -- delete Bcc: headers */ 129 e->e_flags |= EF_DELETE_BCC; 130 } 131 else if (hvalue("bcc", e->e_header) == NULL) 132 { 133 /* no valid recipient headers */ 134 register ADDRESS *q; 135 char *hdr = NULL; 136 137 /* create a recipient field */ 138 switch (NoRecipientAction) 139 { 140 case NRA_ADD_APPARENTLY_TO: 141 hdr = "Apparently-To"; 142 break; 143 144 case NRA_ADD_TO: 145 hdr = "To"; 146 break; 147 148 case NRA_ADD_BCC: 149 addheader("Bcc", " ", 0, e, true); 150 break; 151 152 case NRA_ADD_TO_UNDISCLOSED: 153 addheader("To", "undisclosed-recipients:;", 0, e, true); 154 break; 155 } 156 157 if (hdr != NULL) 158 { 159 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 160 { 161 if (q->q_alias != NULL) 162 continue; 163 if (tTd(30, 3)) 164 sm_dprintf("Adding %s: %s\n", 165 hdr, q->q_paddr); 166 addheader(hdr, q->q_paddr, 0, e, true); 167 } 168 } 169 } 170 } 171 172 /* 173 ** COLLECT_DFOPEN -- open the message data file 174 ** 175 ** Called by collect() after it has finished processing the header. 176 ** Queue selection occurs at this point, possibly based on the 177 ** envelope's recipient list and on header information. 178 ** 179 ** Parameters: 180 ** e -- envelope 181 ** 182 ** Results: 183 ** NULL, or a pointer to an open data file, 184 ** into which the message body will be written by collect(). 185 ** 186 ** Side Effects: 187 ** Calls syserr, sets EF_FATALERRS and returns NULL 188 ** if there is insufficient disk space. 189 ** Aborts process if data file could not be opened. 190 ** Otherwise, the queue is selected, 191 ** e->e_{dfino,dfdev,msgsize,flags} are updated, 192 ** and a pointer to an open data file is returned. 193 */ 194 195 static SM_FILE_T * 196 collect_dfopen(e) 197 ENVELOPE *e; 198 { 199 MODE_T oldumask = 0; 200 int dfd; 201 struct stat stbuf; 202 SM_FILE_T *df; 203 char *dfname; 204 205 if (!setnewqueue(e)) 206 return NULL; 207 208 dfname = queuename(e, DATAFL_LETTER); 209 if (bitset(S_IWGRP, QueueFileMode)) 210 oldumask = umask(002); 211 df = bfopen(dfname, QueueFileMode, DataFileBufferSize, 212 SFF_OPENASROOT); 213 if (bitset(S_IWGRP, QueueFileMode)) 214 (void) umask(oldumask); 215 if (df == NULL) 216 { 217 syserr("@Cannot create %s", dfname); 218 e->e_flags |= EF_NO_BODY_RETN; 219 flush_errors(true); 220 finis(false, true, ExitStat); 221 /* NOTREACHED */ 222 } 223 dfd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL); 224 if (dfd < 0 || fstat(dfd, &stbuf) < 0) 225 e->e_dfino = -1; 226 else 227 { 228 e->e_dfdev = stbuf.st_dev; 229 e->e_dfino = stbuf.st_ino; 230 } 231 e->e_flags |= EF_HAS_DF; 232 return df; 233 } 234 235 /* 236 ** COLLECT -- read & parse message header & make temp file. 237 ** 238 ** Creates a temporary file name and copies the standard 239 ** input to that file. Leading UNIX-style "From" lines are 240 ** stripped off (after important information is extracted). 241 ** 242 ** Parameters: 243 ** fp -- file to read. 244 ** smtpmode -- if set, we are running SMTP: give an RFC821 245 ** style message to say we are ready to collect 246 ** input, and never ignore a single dot to mean 247 ** end of message. 248 ** hdrp -- the location to stash the header. 249 ** e -- the current envelope. 250 ** rsetsize -- reset e_msgsize? 251 ** 252 ** Returns: 253 ** none. 254 ** 255 ** Side Effects: 256 ** If successful, 257 ** - Data file is created and filled, and e->e_dfp is set. 258 ** - The from person may be set. 259 ** If the "enough disk space" check fails, 260 ** - syserr is called. 261 ** - e->e_dfp is NULL. 262 ** - e->e_flags & EF_FATALERRS is set. 263 ** - collect() returns. 264 ** If data file cannot be created, the process is terminated. 265 */ 266 267 /* values for input state machine */ 268 #define IS_NORM 0 /* middle of line */ 269 #define IS_BOL 1 /* beginning of line */ 270 #define IS_DOT 2 /* read a dot at beginning of line */ 271 #define IS_DOTCR 3 /* read ".\r" at beginning of line */ 272 #define IS_CR 4 /* read a carriage return */ 273 274 /* values for message state machine */ 275 #define MS_UFROM 0 /* reading Unix from line */ 276 #define MS_HEADER 1 /* reading message header */ 277 #define MS_BODY 2 /* reading message body */ 278 #define MS_DISCARD 3 /* discarding rest of message */ 279 280 void 281 collect(fp, smtpmode, hdrp, e, rsetsize) 282 SM_FILE_T *fp; 283 bool smtpmode; 284 HDR **hdrp; 285 register ENVELOPE *e; 286 bool rsetsize; 287 { 288 register SM_FILE_T *df; 289 bool ignrdot; 290 int dbto; 291 register char *bp; 292 int c; 293 bool inputerr; 294 bool headeronly; 295 char *buf; 296 int buflen; 297 int istate; 298 int mstate; 299 int hdrslen; 300 int numhdrs; 301 int afd; 302 unsigned char *pbp; 303 unsigned char peekbuf[8]; 304 char bufbuf[MAXLINE]; 305 306 df = NULL; 307 ignrdot = smtpmode ? false : IgnrDot; 308 309 /* timeout for I/O functions is in milliseconds */ 310 dbto = smtpmode ? ((int) TimeOuts.to_datablock * 1000) 311 : SM_TIME_FOREVER; 312 sm_io_setinfo(fp, SM_IO_WHAT_TIMEOUT, &dbto); 313 c = SM_IO_EOF; 314 inputerr = false; 315 headeronly = hdrp != NULL; 316 hdrslen = 0; 317 numhdrs = 0; 318 HasEightBits = false; 319 buf = bp = bufbuf; 320 buflen = sizeof(bufbuf); 321 pbp = peekbuf; 322 istate = IS_BOL; 323 mstate = SaveFrom ? MS_HEADER : MS_UFROM; 324 325 /* 326 ** Tell ARPANET to go ahead. 327 */ 328 329 if (smtpmode) 330 message("354 Enter mail, end with \".\" on a line by itself"); 331 332 /* simulate an I/O timeout when used as sink */ 333 if (tTd(83, 101)) 334 sleep(319); 335 336 if (tTd(30, 2)) 337 sm_dprintf("collect\n"); 338 339 /* 340 ** Read the message. 341 ** 342 ** This is done using two interleaved state machines. 343 ** The input state machine is looking for things like 344 ** hidden dots; the message state machine is handling 345 ** the larger picture (e.g., header versus body). 346 */ 347 348 if (rsetsize) 349 e->e_msgsize = 0; 350 for (;;) 351 { 352 if (tTd(30, 35)) 353 sm_dprintf("top, istate=%d, mstate=%d\n", istate, 354 mstate); 355 for (;;) 356 { 357 if (pbp > peekbuf) 358 c = *--pbp; 359 else 360 { 361 while (!sm_io_eof(fp) && !sm_io_error(fp)) 362 { 363 errno = 0; 364 c = sm_io_getc(fp, SM_TIME_DEFAULT); 365 if (c == SM_IO_EOF && errno == EINTR) 366 { 367 /* Interrupted, retry */ 368 sm_io_clearerr(fp); 369 continue; 370 } 371 372 /* timeout? */ 373 if (c == SM_IO_EOF && errno == EAGAIN 374 && smtpmode) 375 { 376 /* 377 ** Override e_message in 378 ** usrerr() as this is the 379 ** reason for failure that 380 ** should be logged for 381 ** undelivered recipients. 382 */ 383 384 e->e_message = NULL; 385 errno = 0; 386 inputerr = true; 387 goto readabort; 388 } 389 break; 390 } 391 if (TrafficLogFile != NULL && !headeronly) 392 { 393 if (istate == IS_BOL) 394 (void) sm_io_fprintf(TrafficLogFile, 395 SM_TIME_DEFAULT, 396 "%05d <<< ", 397 (int) CurrentPid); 398 if (c == SM_IO_EOF) 399 (void) sm_io_fprintf(TrafficLogFile, 400 SM_TIME_DEFAULT, 401 "[EOF]\n"); 402 else 403 (void) sm_io_putc(TrafficLogFile, 404 SM_TIME_DEFAULT, 405 c); 406 } 407 if (c == SM_IO_EOF) 408 goto readerr; 409 if (SevenBitInput) 410 c &= 0x7f; 411 else 412 HasEightBits |= bitset(0x80, c); 413 } 414 if (tTd(30, 94)) 415 sm_dprintf("istate=%d, c=%c (0x%x)\n", 416 istate, (char) c, c); 417 switch (istate) 418 { 419 case IS_BOL: 420 if (c == '.') 421 { 422 istate = IS_DOT; 423 continue; 424 } 425 break; 426 427 case IS_DOT: 428 if (c == '\n' && !ignrdot && 429 !bitset(EF_NL_NOT_EOL, e->e_flags)) 430 goto readerr; 431 else if (c == '\r' && 432 !bitset(EF_CRLF_NOT_EOL, e->e_flags)) 433 { 434 istate = IS_DOTCR; 435 continue; 436 } 437 else if (ignrdot || 438 (c != '.' && 439 OpMode != MD_SMTP && 440 OpMode != MD_DAEMON && 441 OpMode != MD_ARPAFTP)) 442 443 { 444 SM_ASSERT(pbp < peekbuf + 445 sizeof(peekbuf)); 446 *pbp++ = c; 447 c = '.'; 448 } 449 break; 450 451 case IS_DOTCR: 452 if (c == '\n' && !ignrdot) 453 goto readerr; 454 else 455 { 456 /* push back the ".\rx" */ 457 SM_ASSERT(pbp < peekbuf + 458 sizeof(peekbuf)); 459 *pbp++ = c; 460 if (OpMode != MD_SMTP && 461 OpMode != MD_DAEMON && 462 OpMode != MD_ARPAFTP) 463 { 464 SM_ASSERT(pbp < peekbuf + 465 sizeof(peekbuf)); 466 *pbp++ = '\r'; 467 c = '.'; 468 } 469 else 470 c = '\r'; 471 } 472 break; 473 474 case IS_CR: 475 if (c == '\n') 476 istate = IS_BOL; 477 else 478 { 479 (void) sm_io_ungetc(fp, SM_TIME_DEFAULT, 480 c); 481 c = '\r'; 482 istate = IS_NORM; 483 } 484 goto bufferchar; 485 } 486 487 if (c == '\r' && !bitset(EF_CRLF_NOT_EOL, e->e_flags)) 488 { 489 istate = IS_CR; 490 continue; 491 } 492 else if (c == '\n' && !bitset(EF_NL_NOT_EOL, 493 e->e_flags)) 494 istate = IS_BOL; 495 else 496 istate = IS_NORM; 497 498 bufferchar: 499 if (!headeronly) 500 { 501 /* no overflow? */ 502 if (e->e_msgsize >= 0) 503 { 504 e->e_msgsize++; 505 if (MaxMessageSize > 0 && 506 !bitset(EF_TOOBIG, e->e_flags) && 507 e->e_msgsize > MaxMessageSize) 508 e->e_flags |= EF_TOOBIG; 509 } 510 } 511 switch (mstate) 512 { 513 case MS_BODY: 514 /* just put the character out */ 515 if (!bitset(EF_TOOBIG, e->e_flags)) 516 (void) sm_io_putc(df, SM_TIME_DEFAULT, 517 c); 518 519 /* FALLTHROUGH */ 520 521 case MS_DISCARD: 522 continue; 523 } 524 525 SM_ASSERT(mstate == MS_UFROM || mstate == MS_HEADER); 526 527 /* header -- buffer up */ 528 if (bp >= &buf[buflen - 2]) 529 { 530 char *obuf; 531 532 /* out of space for header */ 533 obuf = buf; 534 if (buflen < MEMCHUNKSIZE) 535 buflen *= 2; 536 else 537 buflen += MEMCHUNKSIZE; 538 if (buflen <= 0) 539 { 540 sm_syslog(LOG_NOTICE, e->e_id, 541 "header overflow from %s during message collect", 542 CURHOSTNAME); 543 errno = 0; 544 e->e_flags |= EF_CLRQUEUE; 545 e->e_status = "5.6.0"; 546 usrerrenh(e->e_status, 547 "552 Headers too large"); 548 goto discard; 549 } 550 buf = xalloc(buflen); 551 memmove(buf, obuf, bp - obuf); 552 bp = &buf[bp - obuf]; 553 if (obuf != bufbuf) 554 sm_free(obuf); /* XXX */ 555 } 556 557 if (c != '\0') 558 { 559 *bp++ = c; 560 ++hdrslen; 561 if (!headeronly && 562 MaxHeadersLength > 0 && 563 hdrslen > MaxHeadersLength) 564 { 565 sm_syslog(LOG_NOTICE, e->e_id, 566 "headers too large (%d max) from %s during message collect", 567 MaxHeadersLength, 568 CURHOSTNAME); 569 errno = 0; 570 e->e_flags |= EF_CLRQUEUE; 571 e->e_status = "5.6.0"; 572 usrerrenh(e->e_status, 573 "552 Headers too large (%d max)", 574 MaxHeadersLength); 575 discard: 576 mstate = MS_DISCARD; 577 } 578 } 579 if (istate == IS_BOL) 580 break; 581 } 582 *bp = '\0'; 583 584 nextstate: 585 if (tTd(30, 35)) 586 sm_dprintf("nextstate, istate=%d, mstate=%d, line=\"%s\"\n", 587 istate, mstate, buf); 588 switch (mstate) 589 { 590 case MS_UFROM: 591 mstate = MS_HEADER; 592 #ifndef NOTUNIX 593 if (strncmp(buf, "From ", 5) == 0) 594 { 595 bp = buf; 596 eatfrom(buf, e); 597 continue; 598 } 599 #endif /* ! NOTUNIX */ 600 /* FALLTHROUGH */ 601 602 case MS_HEADER: 603 if (!isheader(buf)) 604 { 605 mstate = MS_BODY; 606 goto nextstate; 607 } 608 609 /* check for possible continuation line */ 610 do 611 { 612 sm_io_clearerr(fp); 613 errno = 0; 614 c = sm_io_getc(fp, SM_TIME_DEFAULT); 615 616 /* timeout? */ 617 if (c == SM_IO_EOF && errno == EAGAIN 618 && smtpmode) 619 { 620 /* 621 ** Override e_message in 622 ** usrerr() as this is the 623 ** reason for failure that 624 ** should be logged for 625 ** undelivered recipients. 626 */ 627 628 e->e_message = NULL; 629 errno = 0; 630 inputerr = true; 631 goto readabort; 632 } 633 } while (c == SM_IO_EOF && errno == EINTR); 634 if (c != SM_IO_EOF) 635 (void) sm_io_ungetc(fp, SM_TIME_DEFAULT, c); 636 if (c == ' ' || c == '\t') 637 { 638 /* yep -- defer this */ 639 continue; 640 } 641 642 SM_ASSERT(bp > buf); 643 644 /* guaranteed by isheader(buf) */ 645 SM_ASSERT(*(bp - 1) != '\n' || bp > buf + 1); 646 647 /* trim off trailing CRLF or NL */ 648 if (*--bp != '\n' || *--bp != '\r') 649 bp++; 650 *bp = '\0'; 651 652 if (bitset(H_EOH, chompheader(buf, 653 CHHDR_CHECK | CHHDR_USER, 654 hdrp, e))) 655 { 656 mstate = MS_BODY; 657 goto nextstate; 658 } 659 numhdrs++; 660 break; 661 662 case MS_BODY: 663 if (tTd(30, 1)) 664 sm_dprintf("EOH\n"); 665 666 if (headeronly) 667 goto readerr; 668 669 df = collect_eoh(e, numhdrs, hdrslen); 670 if (df == NULL) 671 e->e_flags |= EF_TOOBIG; 672 673 bp = buf; 674 675 /* toss blank line */ 676 if ((!bitset(EF_CRLF_NOT_EOL, e->e_flags) && 677 bp[0] == '\r' && bp[1] == '\n') || 678 (!bitset(EF_NL_NOT_EOL, e->e_flags) && 679 bp[0] == '\n')) 680 { 681 break; 682 } 683 684 /* if not a blank separator, write it out */ 685 if (!bitset(EF_TOOBIG, e->e_flags)) 686 { 687 while (*bp != '\0') 688 (void) sm_io_putc(df, SM_TIME_DEFAULT, 689 *bp++); 690 } 691 break; 692 } 693 bp = buf; 694 } 695 696 readerr: 697 if ((sm_io_eof(fp) && smtpmode) || sm_io_error(fp)) 698 { 699 const char *errmsg; 700 701 if (sm_io_eof(fp)) 702 errmsg = "unexpected close"; 703 else 704 errmsg = sm_errstring(errno); 705 if (tTd(30, 1)) 706 sm_dprintf("collect: premature EOM: %s\n", errmsg); 707 if (LogLevel > 1) 708 sm_syslog(LOG_WARNING, e->e_id, 709 "collect: premature EOM: %s", errmsg); 710 inputerr = true; 711 } 712 713 if (headeronly) 714 return; 715 716 if (mstate != MS_BODY) 717 { 718 /* no body or discard, so we never opened the data file */ 719 SM_ASSERT(df == NULL); 720 df = collect_eoh(e, numhdrs, hdrslen); 721 } 722 723 if (df == NULL) 724 { 725 /* skip next few clauses */ 726 /* EMPTY */ 727 } 728 else if (sm_io_flush(df, SM_TIME_DEFAULT) != 0 || sm_io_error(df)) 729 { 730 dferror(df, "sm_io_flush||sm_io_error", e); 731 flush_errors(true); 732 finis(true, true, ExitStat); 733 /* NOTREACHED */ 734 } 735 else if (SuperSafe == SAFE_NO || 736 SuperSafe == SAFE_INTERACTIVE || 737 (SuperSafe == SAFE_REALLY_POSTMILTER && smtpmode)) 738 { 739 /* skip next few clauses */ 740 /* EMPTY */ 741 /* Note: updfs() is not called in this case! */ 742 } 743 else if (sm_io_setinfo(df, SM_BF_COMMIT, NULL) < 0 && errno != EINVAL) 744 { 745 int save_errno = errno; 746 747 if (save_errno == EEXIST) 748 { 749 char *dfile; 750 struct stat st; 751 int dfd; 752 753 dfile = queuename(e, DATAFL_LETTER); 754 if (stat(dfile, &st) < 0) 755 st.st_size = -1; 756 errno = EEXIST; 757 syserr("@collect: bfcommit(%s): already on disk, size=%ld", 758 dfile, (long) st.st_size); 759 dfd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL); 760 if (dfd >= 0) 761 dumpfd(dfd, true, true); 762 } 763 errno = save_errno; 764 dferror(df, "bfcommit", e); 765 flush_errors(true); 766 finis(save_errno != EEXIST, true, ExitStat); 767 } 768 else if ((afd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL)) < 0) 769 { 770 dferror(df, "sm_io_getinfo", e); 771 flush_errors(true); 772 finis(true, true, ExitStat); 773 /* NOTREACHED */ 774 } 775 else if (fsync(afd) < 0) 776 { 777 dferror(df, "fsync", e); 778 flush_errors(true); 779 finis(true, true, ExitStat); 780 /* NOTREACHED */ 781 } 782 else if (sm_io_close(df, SM_TIME_DEFAULT) < 0) 783 { 784 dferror(df, "sm_io_close", e); 785 flush_errors(true); 786 finis(true, true, ExitStat); 787 /* NOTREACHED */ 788 } 789 else 790 { 791 /* everything is happily flushed to disk */ 792 df = NULL; 793 794 /* remove from available space in filesystem */ 795 updfs(e, 0, 1, "collect"); 796 } 797 798 /* An EOF when running SMTP is an error */ 799 readabort: 800 if (inputerr && (OpMode == MD_SMTP || OpMode == MD_DAEMON)) 801 { 802 char *host; 803 char *problem; 804 ADDRESS *q; 805 806 host = RealHostName; 807 if (host == NULL) 808 host = "localhost"; 809 810 if (sm_io_eof(fp)) 811 problem = "unexpected close"; 812 else if (sm_io_error(fp)) 813 problem = "I/O error"; 814 else 815 problem = "read timeout"; 816 if (LogLevel > 0 && sm_io_eof(fp)) 817 sm_syslog(LOG_NOTICE, e->e_id, 818 "collect: %s on connection from %.100s, sender=%s", 819 problem, host, 820 shortenstring(e->e_from.q_paddr, MAXSHORTSTR)); 821 if (sm_io_eof(fp)) 822 usrerr("421 4.4.1 collect: %s on connection from %s, from=%s", 823 problem, host, 824 shortenstring(e->e_from.q_paddr, MAXSHORTSTR)); 825 else 826 syserr("421 4.4.1 collect: %s on connection from %s, from=%s", 827 problem, host, 828 shortenstring(e->e_from.q_paddr, MAXSHORTSTR)); 829 flush_errors(true); 830 831 /* don't return an error indication */ 832 e->e_to = NULL; 833 e->e_flags &= ~EF_FATALERRS; 834 e->e_flags |= EF_CLRQUEUE; 835 836 /* Don't send any message notification to sender */ 837 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 838 { 839 if (QS_IS_DEAD(q->q_state)) 840 continue; 841 q->q_state = QS_FATALERR; 842 } 843 844 (void) sm_io_close(df, SM_TIME_DEFAULT); 845 df = NULL; 846 finis(true, true, ExitStat); 847 /* NOTREACHED */ 848 } 849 850 /* Log collection information. */ 851 if (bitset(EF_LOGSENDER, e->e_flags) && LogLevel > 4) 852 { 853 logsender(e, e->e_msgid); 854 e->e_flags &= ~EF_LOGSENDER; 855 } 856 857 /* check for message too large */ 858 if (bitset(EF_TOOBIG, e->e_flags)) 859 { 860 e->e_flags |= EF_NO_BODY_RETN|EF_CLRQUEUE; 861 if (!bitset(EF_FATALERRS, e->e_flags)) 862 { 863 e->e_status = "5.2.3"; 864 usrerrenh(e->e_status, 865 "552 Message exceeds maximum fixed size (%ld)", 866 MaxMessageSize); 867 if (LogLevel > 6) 868 sm_syslog(LOG_NOTICE, e->e_id, 869 "message size (%ld) exceeds maximum (%ld)", 870 e->e_msgsize, MaxMessageSize); 871 } 872 } 873 874 /* check for illegal 8-bit data */ 875 if (HasEightBits) 876 { 877 e->e_flags |= EF_HAS8BIT; 878 if (!bitset(MM_PASS8BIT|MM_MIME8BIT, MimeMode) && 879 !bitset(EF_IS_MIME, e->e_flags)) 880 { 881 e->e_status = "5.6.1"; 882 usrerrenh(e->e_status, "554 Eight bit data not allowed"); 883 } 884 } 885 else 886 { 887 /* if it claimed to be 8 bits, well, it lied.... */ 888 if (e->e_bodytype != NULL && 889 sm_strcasecmp(e->e_bodytype, "8BITMIME") == 0) 890 e->e_bodytype = "7BIT"; 891 } 892 893 if (SuperSafe == SAFE_REALLY && !bitset(EF_FATALERRS, e->e_flags)) 894 { 895 char *dfname = queuename(e, DATAFL_LETTER); 896 if ((e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, dfname, 897 SM_IO_RDONLY_B, NULL)) == NULL) 898 { 899 /* we haven't acked receipt yet, so just chuck this */ 900 syserr("@Cannot reopen %s", dfname); 901 finis(true, true, ExitStat); 902 /* NOTREACHED */ 903 } 904 } 905 else 906 e->e_dfp = df; 907 908 /* collect statistics */ 909 if (OpMode != MD_VERIFY) 910 { 911 /* 912 ** Recalculate e_msgpriority, it is done at in eatheader() 913 ** which is called (in 8.12) after the header is collected, 914 ** hence e_msgsize is (most likely) incorrect. 915 */ 916 917 e->e_msgpriority = e->e_msgsize 918 - e->e_class * WkClassFact 919 + e->e_nrcpts * WkRecipFact; 920 markstats(e, (ADDRESS *) NULL, STATS_NORMAL); 921 } 922 } 923 924 /* 925 ** DFERROR -- signal error on writing the data file. 926 ** 927 ** Called by collect(). Collect() always terminates the process 928 ** immediately after calling dferror(), which means that the SMTP 929 ** session will be terminated, which means that any error message 930 ** issued by dferror must be a 421 error, as per RFC 821. 931 ** 932 ** Parameters: 933 ** df -- the file pointer for the data file. 934 ** msg -- detailed message. 935 ** e -- the current envelope. 936 ** 937 ** Returns: 938 ** none. 939 ** 940 ** Side Effects: 941 ** Gives an error message. 942 ** Arranges for following output to go elsewhere. 943 */ 944 945 void 946 dferror(df, msg, e) 947 SM_FILE_T *volatile df; 948 char *msg; 949 register ENVELOPE *e; 950 { 951 char *dfname; 952 953 dfname = queuename(e, DATAFL_LETTER); 954 setstat(EX_IOERR); 955 if (errno == ENOSPC) 956 { 957 #if STAT64 > 0 958 struct stat64 st; 959 #else /* STAT64 > 0 */ 960 struct stat st; 961 #endif /* STAT64 > 0 */ 962 long avail; 963 long bsize; 964 965 e->e_flags |= EF_NO_BODY_RETN; 966 967 if ( 968 #if STAT64 > 0 969 fstat64(sm_io_getinfo(df, SM_IO_WHAT_FD, NULL), &st) 970 #else /* STAT64 > 0 */ 971 fstat(sm_io_getinfo(df, SM_IO_WHAT_FD, NULL), &st) 972 #endif /* STAT64 > 0 */ 973 < 0) 974 st.st_size = 0; 975 (void) sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, dfname, 976 SM_IO_WRONLY_B, NULL, df); 977 if (st.st_size <= 0) 978 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 979 "\n*** Mail could not be accepted"); 980 else 981 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 982 "\n*** Mail of at least %llu bytes could not be accepted\n", 983 (ULONGLONG_T) st.st_size); 984 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 985 "*** at %s due to lack of disk space for temp file.\n", 986 MyHostName); 987 avail = freediskspace(qid_printqueue(e->e_qgrp, e->e_qdir), 988 &bsize); 989 if (avail > 0) 990 { 991 if (bsize > 1024) 992 avail *= bsize / 1024; 993 else if (bsize < 1024) 994 avail /= 1024 / bsize; 995 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 996 "*** Currently, %ld kilobytes are available for mail temp files.\n", 997 avail); 998 } 999 #if 0 1000 /* Wrong response code; should be 421. */ 1001 e->e_status = "4.3.1"; 1002 usrerrenh(e->e_status, "452 Out of disk space for temp file"); 1003 #else /* 0 */ 1004 syserr("421 4.3.1 Out of disk space for temp file"); 1005 #endif /* 0 */ 1006 } 1007 else 1008 syserr("421 4.3.0 collect: Cannot write %s (%s, uid=%d, gid=%d)", 1009 dfname, msg, (int) geteuid(), (int) getegid()); 1010 if (sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, SM_PATH_DEVNULL, 1011 SM_IO_WRONLY, NULL, df) == NULL) 1012 sm_syslog(LOG_ERR, e->e_id, 1013 "dferror: sm_io_reopen(\"/dev/null\") failed: %s", 1014 sm_errstring(errno)); 1015 } 1016 /* 1017 ** EATFROM -- chew up a UNIX style from line and process 1018 ** 1019 ** This does indeed make some assumptions about the format 1020 ** of UNIX messages. 1021 ** 1022 ** Parameters: 1023 ** fm -- the from line. 1024 ** e -- envelope 1025 ** 1026 ** Returns: 1027 ** none. 1028 ** 1029 ** Side Effects: 1030 ** extracts what information it can from the header, 1031 ** such as the date. 1032 */ 1033 1034 #ifndef NOTUNIX 1035 1036 static char *DowList[] = 1037 { 1038 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL 1039 }; 1040 1041 static char *MonthList[] = 1042 { 1043 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 1044 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", 1045 NULL 1046 }; 1047 1048 static void 1049 eatfrom(fm, e) 1050 char *volatile fm; 1051 register ENVELOPE *e; 1052 { 1053 register char *p; 1054 register char **dt; 1055 1056 if (tTd(30, 2)) 1057 sm_dprintf("eatfrom(%s)\n", fm); 1058 1059 /* find the date part */ 1060 p = fm; 1061 while (*p != '\0') 1062 { 1063 /* skip a word */ 1064 while (*p != '\0' && *p != ' ') 1065 p++; 1066 while (*p == ' ') 1067 p++; 1068 if (strlen(p) < 17) 1069 { 1070 /* no room for the date */ 1071 return; 1072 } 1073 if (!(isascii(*p) && isupper(*p)) || 1074 p[3] != ' ' || p[13] != ':' || p[16] != ':') 1075 continue; 1076 1077 /* we have a possible date */ 1078 for (dt = DowList; *dt != NULL; dt++) 1079 if (strncmp(*dt, p, 3) == 0) 1080 break; 1081 if (*dt == NULL) 1082 continue; 1083 1084 for (dt = MonthList; *dt != NULL; dt++) 1085 { 1086 if (strncmp(*dt, &p[4], 3) == 0) 1087 break; 1088 } 1089 if (*dt != NULL) 1090 break; 1091 } 1092 1093 if (*p != '\0') 1094 { 1095 char *q, buf[25]; 1096 1097 /* we have found a date */ 1098 (void) sm_strlcpy(buf, p, sizeof(buf)); 1099 q = arpadate(buf); 1100 macdefine(&e->e_macro, A_TEMP, 'a', q); 1101 } 1102 } 1103 #endif /* ! NOTUNIX */ 1104