1 /* 2 * Copyright (c) 1998-2006, 2008 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 8.286 2013/03/15 17:54:12 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 #if _FFR_REJECT_NUL_BYTE 304 bool hasNUL; /* has at least one NUL input byte */ 305 #endif /* _FFR_REJECT_NUL_BYTE */ 306 307 df = NULL; 308 ignrdot = smtpmode ? false : IgnrDot; 309 310 /* timeout for I/O functions is in milliseconds */ 311 dbto = smtpmode ? ((int) TimeOuts.to_datablock * 1000) 312 : SM_TIME_FOREVER; 313 sm_io_setinfo(fp, SM_IO_WHAT_TIMEOUT, &dbto); 314 set_tls_rd_tmo(TimeOuts.to_datablock); 315 c = SM_IO_EOF; 316 inputerr = false; 317 headeronly = hdrp != NULL; 318 hdrslen = 0; 319 numhdrs = 0; 320 HasEightBits = false; 321 #if _FFR_REJECT_NUL_BYTE 322 hasNUL = false; 323 #endif /* _FFR_REJECT_NUL_BYTE */ 324 buf = bp = bufbuf; 325 buflen = sizeof(bufbuf); 326 pbp = peekbuf; 327 istate = IS_BOL; 328 mstate = SaveFrom ? MS_HEADER : MS_UFROM; 329 330 /* 331 ** Tell ARPANET to go ahead. 332 */ 333 334 if (smtpmode) 335 message("354 Enter mail, end with \".\" on a line by itself"); 336 337 /* simulate an I/O timeout when used as sink */ 338 if (tTd(83, 101)) 339 sleep(319); 340 341 if (tTd(30, 2)) 342 sm_dprintf("collect\n"); 343 344 /* 345 ** Read the message. 346 ** 347 ** This is done using two interleaved state machines. 348 ** The input state machine is looking for things like 349 ** hidden dots; the message state machine is handling 350 ** the larger picture (e.g., header versus body). 351 */ 352 353 if (rsetsize) 354 e->e_msgsize = 0; 355 for (;;) 356 { 357 if (tTd(30, 35)) 358 sm_dprintf("top, istate=%d, mstate=%d\n", istate, 359 mstate); 360 for (;;) 361 { 362 if (pbp > peekbuf) 363 c = *--pbp; 364 else 365 { 366 while (!sm_io_eof(fp) && !sm_io_error(fp)) 367 { 368 errno = 0; 369 c = sm_io_getc(fp, SM_TIME_DEFAULT); 370 if (c == SM_IO_EOF && errno == EINTR) 371 { 372 /* Interrupted, retry */ 373 sm_io_clearerr(fp); 374 continue; 375 } 376 377 /* timeout? */ 378 if (c == SM_IO_EOF && errno == EAGAIN 379 && smtpmode) 380 { 381 /* 382 ** Override e_message in 383 ** usrerr() as this is the 384 ** reason for failure that 385 ** should be logged for 386 ** undelivered recipients. 387 */ 388 389 e->e_message = NULL; 390 errno = 0; 391 inputerr = true; 392 goto readabort; 393 } 394 break; 395 } 396 if (TrafficLogFile != NULL && !headeronly) 397 { 398 if (istate == IS_BOL) 399 (void) sm_io_fprintf(TrafficLogFile, 400 SM_TIME_DEFAULT, 401 "%05d <<< ", 402 (int) CurrentPid); 403 if (c == SM_IO_EOF) 404 (void) sm_io_fprintf(TrafficLogFile, 405 SM_TIME_DEFAULT, 406 "[EOF]\n"); 407 else 408 (void) sm_io_putc(TrafficLogFile, 409 SM_TIME_DEFAULT, 410 c); 411 } 412 #if _FFR_REJECT_NUL_BYTE 413 if (c == '\0') 414 hasNUL = true; 415 #endif /* _FFR_REJECT_NUL_BYTE */ 416 if (c == SM_IO_EOF) 417 goto readerr; 418 if (SevenBitInput) 419 c &= 0x7f; 420 else 421 HasEightBits |= bitset(0x80, c); 422 } 423 if (tTd(30, 94)) 424 sm_dprintf("istate=%d, c=%c (0x%x)\n", 425 istate, (char) c, c); 426 switch (istate) 427 { 428 case IS_BOL: 429 if (c == '.') 430 { 431 istate = IS_DOT; 432 continue; 433 } 434 break; 435 436 case IS_DOT: 437 if (c == '\n' && !ignrdot && 438 !bitset(EF_NL_NOT_EOL, e->e_flags)) 439 goto readerr; 440 else if (c == '\r' && 441 !bitset(EF_CRLF_NOT_EOL, e->e_flags)) 442 { 443 istate = IS_DOTCR; 444 continue; 445 } 446 else if (ignrdot || 447 (c != '.' && 448 OpMode != MD_SMTP && 449 OpMode != MD_DAEMON && 450 OpMode != MD_ARPAFTP)) 451 452 { 453 SM_ASSERT(pbp < peekbuf + 454 sizeof(peekbuf)); 455 *pbp++ = c; 456 c = '.'; 457 } 458 break; 459 460 case IS_DOTCR: 461 if (c == '\n' && !ignrdot) 462 goto readerr; 463 else 464 { 465 /* push back the ".\rx" */ 466 SM_ASSERT(pbp < peekbuf + 467 sizeof(peekbuf)); 468 *pbp++ = c; 469 if (OpMode != MD_SMTP && 470 OpMode != MD_DAEMON && 471 OpMode != MD_ARPAFTP) 472 { 473 SM_ASSERT(pbp < peekbuf + 474 sizeof(peekbuf)); 475 *pbp++ = '\r'; 476 c = '.'; 477 } 478 else 479 c = '\r'; 480 } 481 break; 482 483 case IS_CR: 484 if (c == '\n') 485 istate = IS_BOL; 486 else 487 { 488 (void) sm_io_ungetc(fp, SM_TIME_DEFAULT, 489 c); 490 c = '\r'; 491 istate = IS_NORM; 492 } 493 goto bufferchar; 494 } 495 496 if (c == '\r' && !bitset(EF_CRLF_NOT_EOL, e->e_flags)) 497 { 498 istate = IS_CR; 499 continue; 500 } 501 else if (c == '\n' && !bitset(EF_NL_NOT_EOL, 502 e->e_flags)) 503 istate = IS_BOL; 504 else 505 istate = IS_NORM; 506 507 bufferchar: 508 if (!headeronly) 509 { 510 /* no overflow? */ 511 if (e->e_msgsize >= 0) 512 { 513 e->e_msgsize++; 514 if (MaxMessageSize > 0 && 515 !bitset(EF_TOOBIG, e->e_flags) && 516 e->e_msgsize > MaxMessageSize) 517 e->e_flags |= EF_TOOBIG; 518 } 519 } 520 switch (mstate) 521 { 522 case MS_BODY: 523 /* just put the character out */ 524 if (!bitset(EF_TOOBIG, e->e_flags)) 525 (void) sm_io_putc(df, SM_TIME_DEFAULT, 526 c); 527 528 /* FALLTHROUGH */ 529 530 case MS_DISCARD: 531 continue; 532 } 533 534 SM_ASSERT(mstate == MS_UFROM || mstate == MS_HEADER); 535 536 /* header -- buffer up */ 537 if (bp >= &buf[buflen - 2]) 538 { 539 char *obuf; 540 541 /* out of space for header */ 542 obuf = buf; 543 if (buflen < MEMCHUNKSIZE) 544 buflen *= 2; 545 else 546 buflen += MEMCHUNKSIZE; 547 if (buflen <= 0) 548 { 549 sm_syslog(LOG_NOTICE, e->e_id, 550 "header overflow from %s during message collect", 551 CURHOSTNAME); 552 errno = 0; 553 e->e_flags |= EF_CLRQUEUE; 554 e->e_status = "5.6.0"; 555 usrerrenh(e->e_status, 556 "552 Headers too large"); 557 goto discard; 558 } 559 buf = xalloc(buflen); 560 memmove(buf, obuf, bp - obuf); 561 bp = &buf[bp - obuf]; 562 if (obuf != bufbuf) 563 sm_free(obuf); /* XXX */ 564 } 565 566 if (c != '\0') 567 { 568 *bp++ = c; 569 ++hdrslen; 570 if (!headeronly && 571 MaxHeadersLength > 0 && 572 hdrslen > MaxHeadersLength) 573 { 574 sm_syslog(LOG_NOTICE, e->e_id, 575 "headers too large (%d max) from %s during message collect", 576 MaxHeadersLength, 577 CURHOSTNAME); 578 errno = 0; 579 e->e_flags |= EF_CLRQUEUE; 580 e->e_status = "5.6.0"; 581 usrerrenh(e->e_status, 582 "552 Headers too large (%d max)", 583 MaxHeadersLength); 584 discard: 585 mstate = MS_DISCARD; 586 } 587 } 588 if (istate == IS_BOL) 589 break; 590 } 591 *bp = '\0'; 592 593 nextstate: 594 if (tTd(30, 35)) 595 sm_dprintf("nextstate, istate=%d, mstate=%d, line=\"%s\"\n", 596 istate, mstate, buf); 597 switch (mstate) 598 { 599 case MS_UFROM: 600 mstate = MS_HEADER; 601 #ifndef NOTUNIX 602 if (strncmp(buf, "From ", 5) == 0) 603 { 604 bp = buf; 605 eatfrom(buf, e); 606 continue; 607 } 608 #endif /* ! NOTUNIX */ 609 /* FALLTHROUGH */ 610 611 case MS_HEADER: 612 if (!isheader(buf)) 613 { 614 mstate = MS_BODY; 615 goto nextstate; 616 } 617 618 /* check for possible continuation line */ 619 do 620 { 621 sm_io_clearerr(fp); 622 errno = 0; 623 c = sm_io_getc(fp, SM_TIME_DEFAULT); 624 625 /* timeout? */ 626 if (c == SM_IO_EOF && errno == EAGAIN 627 && smtpmode) 628 { 629 /* 630 ** Override e_message in 631 ** usrerr() as this is the 632 ** reason for failure that 633 ** should be logged for 634 ** undelivered recipients. 635 */ 636 637 e->e_message = NULL; 638 errno = 0; 639 inputerr = true; 640 goto readabort; 641 } 642 } while (c == SM_IO_EOF && errno == EINTR); 643 if (c != SM_IO_EOF) 644 (void) sm_io_ungetc(fp, SM_TIME_DEFAULT, c); 645 if (c == ' ' || c == '\t') 646 { 647 /* yep -- defer this */ 648 continue; 649 } 650 651 SM_ASSERT(bp > buf); 652 653 /* guaranteed by isheader(buf) */ 654 SM_ASSERT(*(bp - 1) != '\n' || bp > buf + 1); 655 656 /* trim off trailing CRLF or NL */ 657 if (*--bp != '\n' || *--bp != '\r') 658 bp++; 659 *bp = '\0'; 660 661 if (bitset(H_EOH, chompheader(buf, 662 CHHDR_CHECK | CHHDR_USER, 663 hdrp, e))) 664 { 665 mstate = MS_BODY; 666 goto nextstate; 667 } 668 numhdrs++; 669 break; 670 671 case MS_BODY: 672 if (tTd(30, 1)) 673 sm_dprintf("EOH\n"); 674 675 if (headeronly) 676 goto readerr; 677 678 df = collect_eoh(e, numhdrs, hdrslen); 679 if (df == NULL) 680 e->e_flags |= EF_TOOBIG; 681 682 bp = buf; 683 684 /* toss blank line */ 685 if ((!bitset(EF_CRLF_NOT_EOL, e->e_flags) && 686 bp[0] == '\r' && bp[1] == '\n') || 687 (!bitset(EF_NL_NOT_EOL, e->e_flags) && 688 bp[0] == '\n')) 689 { 690 break; 691 } 692 693 /* if not a blank separator, write it out */ 694 if (!bitset(EF_TOOBIG, e->e_flags)) 695 { 696 while (*bp != '\0') 697 (void) sm_io_putc(df, SM_TIME_DEFAULT, 698 *bp++); 699 } 700 break; 701 } 702 bp = buf; 703 } 704 705 readerr: 706 if ((sm_io_eof(fp) && smtpmode) || sm_io_error(fp)) 707 { 708 const char *errmsg; 709 710 if (sm_io_eof(fp)) 711 errmsg = "unexpected close"; 712 else 713 errmsg = sm_errstring(errno); 714 if (tTd(30, 1)) 715 sm_dprintf("collect: premature EOM: %s\n", errmsg); 716 if (LogLevel > 1) 717 sm_syslog(LOG_WARNING, e->e_id, 718 "collect: premature EOM: %s", errmsg); 719 inputerr = true; 720 } 721 722 if (headeronly) 723 return; 724 725 if (mstate != MS_BODY) 726 { 727 /* no body or discard, so we never opened the data file */ 728 SM_ASSERT(df == NULL); 729 df = collect_eoh(e, numhdrs, hdrslen); 730 } 731 732 if (df == NULL) 733 { 734 /* skip next few clauses */ 735 /* EMPTY */ 736 } 737 else if (sm_io_flush(df, SM_TIME_DEFAULT) != 0 || sm_io_error(df)) 738 { 739 dferror(df, "sm_io_flush||sm_io_error", e); 740 flush_errors(true); 741 finis(true, true, ExitStat); 742 /* NOTREACHED */ 743 } 744 else if (SuperSafe == SAFE_NO || 745 SuperSafe == SAFE_INTERACTIVE || 746 (SuperSafe == SAFE_REALLY_POSTMILTER && smtpmode)) 747 { 748 /* skip next few clauses */ 749 /* EMPTY */ 750 /* Note: updfs() is not called in this case! */ 751 } 752 else if (sm_io_setinfo(df, SM_BF_COMMIT, NULL) < 0 && errno != EINVAL) 753 { 754 int save_errno = errno; 755 756 if (save_errno == EEXIST) 757 { 758 char *dfile; 759 struct stat st; 760 int dfd; 761 762 dfile = queuename(e, DATAFL_LETTER); 763 if (stat(dfile, &st) < 0) 764 st.st_size = -1; 765 errno = EEXIST; 766 syserr("@collect: bfcommit(%s): already on disk, size=%ld", 767 dfile, (long) st.st_size); 768 dfd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL); 769 if (dfd >= 0) 770 dumpfd(dfd, true, true); 771 } 772 errno = save_errno; 773 dferror(df, "bfcommit", e); 774 flush_errors(true); 775 finis(save_errno != EEXIST, true, ExitStat); 776 } 777 else if ((afd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL)) < 0) 778 { 779 dferror(df, "sm_io_getinfo", e); 780 flush_errors(true); 781 finis(true, true, ExitStat); 782 /* NOTREACHED */ 783 } 784 else if (fsync(afd) < 0) 785 { 786 dferror(df, "fsync", e); 787 flush_errors(true); 788 finis(true, true, ExitStat); 789 /* NOTREACHED */ 790 } 791 else if (sm_io_close(df, SM_TIME_DEFAULT) < 0) 792 { 793 dferror(df, "sm_io_close", e); 794 flush_errors(true); 795 finis(true, true, ExitStat); 796 /* NOTREACHED */ 797 } 798 else 799 { 800 /* everything is happily flushed to disk */ 801 df = NULL; 802 803 /* remove from available space in filesystem */ 804 updfs(e, 0, 1, "collect"); 805 } 806 807 /* An EOF when running SMTP is an error */ 808 readabort: 809 if (inputerr && (OpMode == MD_SMTP || OpMode == MD_DAEMON)) 810 { 811 char *host; 812 char *problem; 813 ADDRESS *q; 814 815 host = RealHostName; 816 if (host == NULL) 817 host = "localhost"; 818 819 if (sm_io_eof(fp)) 820 problem = "unexpected close"; 821 else if (sm_io_error(fp)) 822 problem = "I/O error"; 823 else 824 problem = "read timeout"; 825 if (LogLevel > 0 && sm_io_eof(fp)) 826 sm_syslog(LOG_NOTICE, e->e_id, 827 "collect: %s on connection from %.100s, sender=%s", 828 problem, host, 829 shortenstring(e->e_from.q_paddr, MAXSHORTSTR)); 830 if (sm_io_eof(fp)) 831 usrerr("421 4.4.1 collect: %s on connection from %s, from=%s", 832 problem, host, 833 shortenstring(e->e_from.q_paddr, MAXSHORTSTR)); 834 else 835 syserr("421 4.4.1 collect: %s on connection from %s, from=%s", 836 problem, host, 837 shortenstring(e->e_from.q_paddr, MAXSHORTSTR)); 838 flush_errors(true); 839 840 /* don't return an error indication */ 841 e->e_to = NULL; 842 e->e_flags &= ~EF_FATALERRS; 843 e->e_flags |= EF_CLRQUEUE; 844 845 /* Don't send any message notification to sender */ 846 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 847 { 848 if (QS_IS_DEAD(q->q_state)) 849 continue; 850 q->q_state = QS_FATALERR; 851 } 852 853 (void) sm_io_close(df, SM_TIME_DEFAULT); 854 df = NULL; 855 finis(true, true, ExitStat); 856 /* NOTREACHED */ 857 } 858 859 /* Log collection information. */ 860 if (tTd(92, 2)) 861 sm_dprintf("collect: e_id=%s, EF_LOGSENDER=%d, LogLevel=%d\n", 862 e->e_id, bitset(EF_LOGSENDER, e->e_flags), LogLevel); 863 if (bitset(EF_LOGSENDER, e->e_flags) && LogLevel > 4) 864 { 865 logsender(e, e->e_msgid); 866 e->e_flags &= ~EF_LOGSENDER; 867 } 868 869 /* check for message too large */ 870 if (bitset(EF_TOOBIG, e->e_flags)) 871 { 872 e->e_flags |= EF_NO_BODY_RETN|EF_CLRQUEUE; 873 if (!bitset(EF_FATALERRS, e->e_flags)) 874 { 875 e->e_status = "5.2.3"; 876 usrerrenh(e->e_status, 877 "552 Message exceeds maximum fixed size (%ld)", 878 MaxMessageSize); 879 if (LogLevel > 6) 880 sm_syslog(LOG_NOTICE, e->e_id, 881 "message size (%ld) exceeds maximum (%ld)", 882 PRT_NONNEGL(e->e_msgsize), 883 MaxMessageSize); 884 } 885 } 886 887 /* check for illegal 8-bit data */ 888 if (HasEightBits) 889 { 890 e->e_flags |= EF_HAS8BIT; 891 if (!bitset(MM_PASS8BIT|MM_MIME8BIT, MimeMode) && 892 !bitset(EF_IS_MIME, e->e_flags)) 893 { 894 e->e_status = "5.6.1"; 895 usrerrenh(e->e_status, "554 Eight bit data not allowed"); 896 } 897 } 898 else 899 { 900 /* if it claimed to be 8 bits, well, it lied.... */ 901 if (e->e_bodytype != NULL && 902 sm_strcasecmp(e->e_bodytype, "8BITMIME") == 0) 903 e->e_bodytype = "7BIT"; 904 } 905 906 #if _FFR_REJECT_NUL_BYTE 907 if (hasNUL && RejectNUL) 908 { 909 e->e_status = "5.6.1"; 910 usrerrenh(e->e_status, "554 NUL byte not allowed"); 911 } 912 #endif /* _FFR_REJECT_NUL_BYTE */ 913 914 if (SuperSafe == SAFE_REALLY && !bitset(EF_FATALERRS, e->e_flags)) 915 { 916 char *dfname = queuename(e, DATAFL_LETTER); 917 if ((e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, dfname, 918 SM_IO_RDONLY_B, NULL)) == NULL) 919 { 920 /* we haven't acked receipt yet, so just chuck this */ 921 syserr("@Cannot reopen %s", dfname); 922 finis(true, true, ExitStat); 923 /* NOTREACHED */ 924 } 925 } 926 else 927 e->e_dfp = df; 928 929 /* collect statistics */ 930 if (OpMode != MD_VERIFY) 931 { 932 /* 933 ** Recalculate e_msgpriority, it is done at in eatheader() 934 ** which is called (in 8.12) after the header is collected, 935 ** hence e_msgsize is (most likely) incorrect. 936 */ 937 938 e->e_msgpriority = e->e_msgsize 939 - e->e_class * WkClassFact 940 + e->e_nrcpts * WkRecipFact; 941 markstats(e, (ADDRESS *) NULL, STATS_NORMAL); 942 } 943 } 944 945 /* 946 ** DFERROR -- signal error on writing the data file. 947 ** 948 ** Called by collect(). Collect() always terminates the process 949 ** immediately after calling dferror(), which means that the SMTP 950 ** session will be terminated, which means that any error message 951 ** issued by dferror must be a 421 error, as per RFC 821. 952 ** 953 ** Parameters: 954 ** df -- the file pointer for the data file. 955 ** msg -- detailed message. 956 ** e -- the current envelope. 957 ** 958 ** Returns: 959 ** none. 960 ** 961 ** Side Effects: 962 ** Gives an error message. 963 ** Arranges for following output to go elsewhere. 964 */ 965 966 void 967 dferror(df, msg, e) 968 SM_FILE_T *volatile df; 969 char *msg; 970 register ENVELOPE *e; 971 { 972 char *dfname; 973 974 dfname = queuename(e, DATAFL_LETTER); 975 setstat(EX_IOERR); 976 if (errno == ENOSPC) 977 { 978 #if STAT64 > 0 979 struct stat64 st; 980 #else /* STAT64 > 0 */ 981 struct stat st; 982 #endif /* STAT64 > 0 */ 983 long avail; 984 long bsize; 985 986 e->e_flags |= EF_NO_BODY_RETN; 987 988 if ( 989 #if STAT64 > 0 990 fstat64(sm_io_getinfo(df, SM_IO_WHAT_FD, NULL), &st) 991 #else /* STAT64 > 0 */ 992 fstat(sm_io_getinfo(df, SM_IO_WHAT_FD, NULL), &st) 993 #endif /* STAT64 > 0 */ 994 < 0) 995 st.st_size = 0; 996 (void) sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, dfname, 997 SM_IO_WRONLY_B, NULL, df); 998 if (st.st_size <= 0) 999 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 1000 "\n*** Mail could not be accepted"); 1001 else 1002 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 1003 "\n*** Mail of at least %llu bytes could not be accepted\n", 1004 (ULONGLONG_T) st.st_size); 1005 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 1006 "*** at %s due to lack of disk space for temp file.\n", 1007 MyHostName); 1008 avail = freediskspace(qid_printqueue(e->e_qgrp, e->e_qdir), 1009 &bsize); 1010 if (avail > 0) 1011 { 1012 if (bsize > 1024) 1013 avail *= bsize / 1024; 1014 else if (bsize < 1024) 1015 avail /= 1024 / bsize; 1016 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 1017 "*** Currently, %ld kilobytes are available for mail temp files.\n", 1018 avail); 1019 } 1020 #if 0 1021 /* Wrong response code; should be 421. */ 1022 e->e_status = "4.3.1"; 1023 usrerrenh(e->e_status, "452 Out of disk space for temp file"); 1024 #else /* 0 */ 1025 syserr("421 4.3.1 Out of disk space for temp file"); 1026 #endif /* 0 */ 1027 } 1028 else 1029 syserr("421 4.3.0 collect: Cannot write %s (%s, uid=%d, gid=%d)", 1030 dfname, msg, (int) geteuid(), (int) getegid()); 1031 if (sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, SM_PATH_DEVNULL, 1032 SM_IO_WRONLY, NULL, df) == NULL) 1033 sm_syslog(LOG_ERR, e->e_id, 1034 "dferror: sm_io_reopen(\"/dev/null\") failed: %s", 1035 sm_errstring(errno)); 1036 } 1037 /* 1038 ** EATFROM -- chew up a UNIX style from line and process 1039 ** 1040 ** This does indeed make some assumptions about the format 1041 ** of UNIX messages. 1042 ** 1043 ** Parameters: 1044 ** fm -- the from line. 1045 ** e -- envelope 1046 ** 1047 ** Returns: 1048 ** none. 1049 ** 1050 ** Side Effects: 1051 ** extracts what information it can from the header, 1052 ** such as the date. 1053 */ 1054 1055 #ifndef NOTUNIX 1056 1057 static char *DowList[] = 1058 { 1059 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL 1060 }; 1061 1062 static char *MonthList[] = 1063 { 1064 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 1065 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", 1066 NULL 1067 }; 1068 1069 static void 1070 eatfrom(fm, e) 1071 char *volatile fm; 1072 register ENVELOPE *e; 1073 { 1074 register char *p; 1075 register char **dt; 1076 1077 if (tTd(30, 2)) 1078 sm_dprintf("eatfrom(%s)\n", fm); 1079 1080 /* find the date part */ 1081 p = fm; 1082 while (*p != '\0') 1083 { 1084 /* skip a word */ 1085 while (*p != '\0' && *p != ' ') 1086 p++; 1087 while (*p == ' ') 1088 p++; 1089 if (strlen(p) < 17) 1090 { 1091 /* no room for the date */ 1092 return; 1093 } 1094 if (!(isascii(*p) && isupper(*p)) || 1095 p[3] != ' ' || p[13] != ':' || p[16] != ':') 1096 continue; 1097 1098 /* we have a possible date */ 1099 for (dt = DowList; *dt != NULL; dt++) 1100 if (strncmp(*dt, p, 3) == 0) 1101 break; 1102 if (*dt == NULL) 1103 continue; 1104 1105 for (dt = MonthList; *dt != NULL; dt++) 1106 { 1107 if (strncmp(*dt, &p[4], 3) == 0) 1108 break; 1109 } 1110 if (*dt != NULL) 1111 break; 1112 } 1113 1114 if (*p != '\0') 1115 { 1116 char *q, buf[25]; 1117 1118 /* we have found a date */ 1119 (void) sm_strlcpy(buf, p, sizeof(buf)); 1120 q = arpadate(buf); 1121 macdefine(&e->e_macro, A_TEMP, 'a', q); 1122 } 1123 } 1124 #endif /* ! NOTUNIX */ 1125