1 /* 2 * Copyright (c) 1998-2004 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 8.254 2004/04/05 18:41:38 ca Exp $") 17 18 static void collecttimeout __P((time_t)); 19 static void eatfrom __P((char *volatile, ENVELOPE *)); 20 static void collect_doheader __P((ENVELOPE *)); 21 static SM_FILE_T *collect_dfopen __P((ENVELOPE *)); 22 static SM_FILE_T *collect_eoh __P((ENVELOPE *, int, int)); 23 24 /* 25 ** COLLECT_EOH -- end-of-header processing in collect() 26 ** 27 ** Called by collect() when it encounters the blank line 28 ** separating the header from the message body, or when it 29 ** encounters EOF in a message that contains only a header. 30 ** 31 ** Parameters: 32 ** e -- envelope 33 ** numhdrs -- number of headers 34 ** hdrslen -- length of headers 35 ** 36 ** Results: 37 ** NULL, or handle to open data file 38 ** 39 ** Side Effects: 40 ** end-of-header check ruleset is invoked. 41 ** envelope state is updated. 42 ** headers may be added and deleted. 43 ** selects the queue. 44 ** opens the data file. 45 */ 46 47 static SM_FILE_T * 48 collect_eoh(e, numhdrs, hdrslen) 49 ENVELOPE *e; 50 int numhdrs; 51 int hdrslen; 52 { 53 char hnum[16]; 54 char hsize[16]; 55 56 /* call the end-of-header check ruleset */ 57 (void) sm_snprintf(hnum, sizeof hnum, "%d", numhdrs); 58 (void) sm_snprintf(hsize, sizeof hsize, "%d", hdrslen); 59 if (tTd(30, 10)) 60 sm_dprintf("collect: rscheck(\"check_eoh\", \"%s $| %s\")\n", 61 hnum, hsize); 62 (void) rscheck("check_eoh", hnum, hsize, e, RSF_UNSTRUCTURED|RSF_COUNT, 63 3, NULL, e->e_id); 64 65 /* 66 ** Process the header, 67 ** select the queue, open the data file. 68 */ 69 70 collect_doheader(e); 71 return collect_dfopen(e); 72 } 73 74 /* 75 ** COLLECT_DOHEADER -- process header in collect() 76 ** 77 ** Called by collect() after it has finished parsing the header, 78 ** but before it selects the queue and creates the data file. 79 ** The results of processing the header will affect queue selection. 80 ** 81 ** Parameters: 82 ** e -- envelope 83 ** 84 ** Results: 85 ** none. 86 ** 87 ** Side Effects: 88 ** envelope state is updated. 89 ** headers may be added and deleted. 90 */ 91 92 static void 93 collect_doheader(e) 94 ENVELOPE *e; 95 { 96 /* 97 ** Find out some information from the headers. 98 ** Examples are who is the from person & the date. 99 */ 100 101 eatheader(e, true, false); 102 103 if (GrabTo && e->e_sendqueue == NULL) 104 usrerr("No recipient addresses found in header"); 105 106 /* 107 ** If we have a Return-Receipt-To:, turn it into a DSN. 108 */ 109 110 if (RrtImpliesDsn && hvalue("return-receipt-to", e->e_header) != NULL) 111 { 112 ADDRESS *q; 113 114 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 115 if (!bitset(QHASNOTIFY, q->q_flags)) 116 q->q_flags |= QHASNOTIFY|QPINGONSUCCESS; 117 } 118 119 /* 120 ** Add an appropriate recipient line if we have none. 121 */ 122 123 if (hvalue("to", e->e_header) != NULL || 124 hvalue("cc", e->e_header) != NULL || 125 hvalue("apparently-to", e->e_header) != NULL) 126 { 127 /* have a valid recipient header -- delete Bcc: headers */ 128 e->e_flags |= EF_DELETE_BCC; 129 } 130 else if (hvalue("bcc", e->e_header) == NULL) 131 { 132 /* no valid recipient headers */ 133 register ADDRESS *q; 134 char *hdr = NULL; 135 136 /* create a recipient field */ 137 switch (NoRecipientAction) 138 { 139 case NRA_ADD_APPARENTLY_TO: 140 hdr = "Apparently-To"; 141 break; 142 143 case NRA_ADD_TO: 144 hdr = "To"; 145 break; 146 147 case NRA_ADD_BCC: 148 addheader("Bcc", " ", 0, e); 149 break; 150 151 case NRA_ADD_TO_UNDISCLOSED: 152 addheader("To", "undisclosed-recipients:;", 0, e); 153 break; 154 } 155 156 if (hdr != NULL) 157 { 158 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 159 { 160 if (q->q_alias != NULL) 161 continue; 162 if (tTd(30, 3)) 163 sm_dprintf("Adding %s: %s\n", 164 hdr, q->q_paddr); 165 addheader(hdr, q->q_paddr, 0, e); 166 } 167 } 168 } 169 } 170 171 /* 172 ** COLLECT_DFOPEN -- open the message data file 173 ** 174 ** Called by collect() after it has finished processing the header. 175 ** Queue selection occurs at this point, possibly based on the 176 ** envelope's recipient list and on header information. 177 ** 178 ** Parameters: 179 ** e -- envelope 180 ** 181 ** Results: 182 ** NULL, or a pointer to an open data file, 183 ** into which the message body will be written by collect(). 184 ** 185 ** Side Effects: 186 ** Calls syserr, sets EF_FATALERRS and returns NULL 187 ** if there is insufficient disk space. 188 ** Aborts process if data file could not be opened. 189 ** Otherwise, the queue is selected, 190 ** e->e_{dfino,dfdev,msgsize,flags} are updated, 191 ** and a pointer to an open data file is returned. 192 */ 193 194 static SM_FILE_T * 195 collect_dfopen(e) 196 ENVELOPE *e; 197 { 198 MODE_T oldumask = 0; 199 int dfd; 200 struct stat stbuf; 201 SM_FILE_T *df; 202 char *dfname; 203 204 if (!setnewqueue(e)) 205 return NULL; 206 207 dfname = queuename(e, DATAFL_LETTER); 208 if (bitset(S_IWGRP, QueueFileMode)) 209 oldumask = umask(002); 210 df = bfopen(dfname, QueueFileMode, DataFileBufferSize, 211 SFF_OPENASROOT); 212 if (bitset(S_IWGRP, QueueFileMode)) 213 (void) umask(oldumask); 214 if (df == NULL) 215 { 216 syserr("@Cannot create %s", dfname); 217 e->e_flags |= EF_NO_BODY_RETN; 218 flush_errors(true); 219 finis(false, true, ExitStat); 220 /* NOTREACHED */ 221 } 222 dfd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL); 223 if (dfd < 0 || fstat(dfd, &stbuf) < 0) 224 e->e_dfino = -1; 225 else 226 { 227 e->e_dfdev = stbuf.st_dev; 228 e->e_dfino = stbuf.st_ino; 229 } 230 e->e_flags |= EF_HAS_DF; 231 return df; 232 } 233 234 /* 235 ** COLLECT -- read & parse message header & make temp file. 236 ** 237 ** Creates a temporary file name and copies the standard 238 ** input to that file. Leading UNIX-style "From" lines are 239 ** stripped off (after important information is extracted). 240 ** 241 ** Parameters: 242 ** fp -- file to read. 243 ** smtpmode -- if set, we are running SMTP: give an RFC821 244 ** style message to say we are ready to collect 245 ** input, and never ignore a single dot to mean 246 ** end of message. 247 ** hdrp -- the location to stash the header. 248 ** e -- the current envelope. 249 ** rsetsize -- reset e_msgsize? 250 ** 251 ** Returns: 252 ** none. 253 ** 254 ** Side Effects: 255 ** If successful, 256 ** - Data file is created and filled, and e->e_dfp is set. 257 ** - The from person may be set. 258 ** If the "enough disk space" check fails, 259 ** - syserr is called. 260 ** - e->e_dfp is NULL. 261 ** - e->e_flags & EF_FATALERRS is set. 262 ** - collect() returns. 263 ** If data file cannot be created, the process is terminated. 264 */ 265 266 static jmp_buf CtxCollectTimeout; 267 static bool volatile CollectProgress; 268 static SM_EVENT *volatile CollectTimeout = NULL; 269 270 /* values for input state machine */ 271 #define IS_NORM 0 /* middle of line */ 272 #define IS_BOL 1 /* beginning of line */ 273 #define IS_DOT 2 /* read a dot at beginning of line */ 274 #define IS_DOTCR 3 /* read ".\r" at beginning of line */ 275 #define IS_CR 4 /* read a carriage return */ 276 277 /* values for message state machine */ 278 #define MS_UFROM 0 /* reading Unix from line */ 279 #define MS_HEADER 1 /* reading message header */ 280 #define MS_BODY 2 /* reading message body */ 281 #define MS_DISCARD 3 /* discarding rest of message */ 282 283 void 284 collect(fp, smtpmode, hdrp, e, rsetsize) 285 SM_FILE_T *fp; 286 bool smtpmode; 287 HDR **hdrp; 288 register ENVELOPE *e; 289 bool rsetsize; 290 { 291 register SM_FILE_T *volatile df; 292 volatile bool ignrdot; 293 volatile time_t dbto; 294 register char *volatile bp; 295 volatile int c; 296 volatile bool inputerr; 297 bool headeronly; 298 char *volatile buf; 299 volatile int buflen; 300 volatile int istate; 301 volatile int mstate; 302 volatile int hdrslen; 303 volatile int numhdrs; 304 volatile int afd; 305 unsigned char *volatile pbp; 306 unsigned char peekbuf[8]; 307 char bufbuf[MAXLINE]; 308 309 df = NULL; 310 ignrdot = smtpmode ? false : IgnrDot; 311 dbto = smtpmode ? TimeOuts.to_datablock : 0; 312 c = SM_IO_EOF; 313 inputerr = false; 314 headeronly = hdrp != NULL; 315 hdrslen = 0; 316 numhdrs = 0; 317 HasEightBits = false; 318 buf = bp = bufbuf; 319 buflen = sizeof bufbuf; 320 pbp = peekbuf; 321 istate = IS_BOL; 322 mstate = SaveFrom ? MS_HEADER : MS_UFROM; 323 CollectProgress = false; 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 if (tTd(30, 2)) 333 sm_dprintf("collect\n"); 334 335 /* 336 ** Read the message. 337 ** 338 ** This is done using two interleaved state machines. 339 ** The input state machine is looking for things like 340 ** hidden dots; the message state machine is handling 341 ** the larger picture (e.g., header versus body). 342 */ 343 344 if (dbto != 0) 345 { 346 /* handle possible input timeout */ 347 if (setjmp(CtxCollectTimeout) != 0) 348 { 349 if (LogLevel > 2) 350 sm_syslog(LOG_NOTICE, e->e_id, 351 "timeout waiting for input from %s during message collect", 352 CURHOSTNAME); 353 errno = 0; 354 if (smtpmode) 355 { 356 /* 357 ** Override e_message in usrerr() as this 358 ** is the reason for failure that should 359 ** be logged for undelivered recipients. 360 */ 361 362 e->e_message = NULL; 363 } 364 usrerr("451 4.4.1 timeout waiting for input during message collect"); 365 goto readerr; 366 } 367 CollectTimeout = sm_setevent(dbto, collecttimeout, dbto); 368 } 369 370 if (rsetsize) 371 e->e_msgsize = 0; 372 for (;;) 373 { 374 if (tTd(30, 35)) 375 sm_dprintf("top, istate=%d, mstate=%d\n", istate, 376 mstate); 377 for (;;) 378 { 379 if (pbp > peekbuf) 380 c = *--pbp; 381 else 382 { 383 while (!sm_io_eof(fp) && !sm_io_error(fp)) 384 { 385 errno = 0; 386 c = sm_io_getc(fp, SM_TIME_DEFAULT); 387 if (c == SM_IO_EOF && errno == EINTR) 388 { 389 /* Interrupted, retry */ 390 sm_io_clearerr(fp); 391 continue; 392 } 393 break; 394 } 395 CollectProgress = true; 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 (c == SM_IO_EOF) 413 goto readerr; 414 if (SevenBitInput) 415 c &= 0x7f; 416 else 417 HasEightBits |= bitset(0x80, c); 418 } 419 if (tTd(30, 94)) 420 sm_dprintf("istate=%d, c=%c (0x%x)\n", 421 istate, (char) c, c); 422 switch (istate) 423 { 424 case IS_BOL: 425 if (c == '.') 426 { 427 istate = IS_DOT; 428 continue; 429 } 430 break; 431 432 case IS_DOT: 433 if (c == '\n' && !ignrdot && 434 !bitset(EF_NL_NOT_EOL, e->e_flags)) 435 goto readerr; 436 else if (c == '\r' && 437 !bitset(EF_CRLF_NOT_EOL, e->e_flags)) 438 { 439 istate = IS_DOTCR; 440 continue; 441 } 442 else if (ignrdot || 443 (c != '.' && 444 OpMode != MD_SMTP && 445 OpMode != MD_DAEMON && 446 OpMode != MD_ARPAFTP)) 447 448 { 449 SM_ASSERT(pbp < peekbuf + sizeof(peekbuf)); 450 *pbp++ = c; 451 c = '.'; 452 } 453 break; 454 455 case IS_DOTCR: 456 if (c == '\n' && !ignrdot) 457 goto readerr; 458 else 459 { 460 /* push back the ".\rx" */ 461 SM_ASSERT(pbp < peekbuf + sizeof(peekbuf)); 462 *pbp++ = c; 463 if (OpMode != MD_SMTP && 464 OpMode != MD_DAEMON && 465 OpMode != MD_ARPAFTP) 466 { 467 SM_ASSERT(pbp < peekbuf + 468 sizeof(peekbuf)); 469 *pbp++ = '\r'; 470 c = '.'; 471 } 472 else 473 c = '\r'; 474 } 475 break; 476 477 case IS_CR: 478 if (c == '\n') 479 istate = IS_BOL; 480 else 481 { 482 (void) sm_io_ungetc(fp, SM_TIME_DEFAULT, 483 c); 484 c = '\r'; 485 istate = IS_NORM; 486 } 487 goto bufferchar; 488 } 489 490 if (c == '\r' && !bitset(EF_CRLF_NOT_EOL, e->e_flags)) 491 { 492 istate = IS_CR; 493 continue; 494 } 495 else if (c == '\n' && !bitset(EF_NL_NOT_EOL, 496 e->e_flags)) 497 istate = IS_BOL; 498 else 499 istate = IS_NORM; 500 501 bufferchar: 502 if (!headeronly) 503 { 504 /* no overflow? */ 505 if (e->e_msgsize >= 0) 506 { 507 e->e_msgsize++; 508 if (MaxMessageSize > 0 && 509 !bitset(EF_TOOBIG, e->e_flags) && 510 e->e_msgsize > MaxMessageSize) 511 e->e_flags |= EF_TOOBIG; 512 } 513 } 514 switch (mstate) 515 { 516 case MS_BODY: 517 /* just put the character out */ 518 if (!bitset(EF_TOOBIG, e->e_flags)) 519 (void) sm_io_putc(df, SM_TIME_DEFAULT, 520 c); 521 522 /* FALLTHROUGH */ 523 524 case MS_DISCARD: 525 continue; 526 } 527 528 /* header -- buffer up */ 529 if (bp >= &buf[buflen - 2]) 530 { 531 char *obuf; 532 533 if (mstate != MS_HEADER) 534 break; 535 536 /* out of space for header */ 537 obuf = buf; 538 if (buflen < MEMCHUNKSIZE) 539 buflen *= 2; 540 else 541 buflen += MEMCHUNKSIZE; 542 buf = xalloc(buflen); 543 memmove(buf, obuf, bp - obuf); 544 bp = &buf[bp - obuf]; 545 if (obuf != bufbuf) 546 sm_free(obuf); /* XXX */ 547 } 548 549 /* 550 ** XXX Notice: the logic here is broken. 551 ** An input to sendmail that doesn't contain a 552 ** header but starts immediately with the body whose 553 ** first line contain characters which match the 554 ** following "if" will cause problems: those 555 ** characters will NOT appear in the output... 556 ** Do we care? 557 */ 558 559 if (c >= 0200 && c <= 0237) 560 { 561 #if 0 /* causes complaints -- figure out something for 8.n+1 */ 562 usrerr("Illegal character 0x%x in header", c); 563 #else /* 0 */ 564 /* EMPTY */ 565 #endif /* 0 */ 566 } 567 else if (c != '\0') 568 { 569 *bp++ = c; 570 ++hdrslen; 571 if (!headeronly && 572 MaxHeadersLength > 0 && 573 hdrslen > MaxHeadersLength) 574 { 575 sm_syslog(LOG_NOTICE, e->e_id, 576 "headers too large (%d max) from %s during message collect", 577 MaxHeadersLength, 578 CURHOSTNAME); 579 errno = 0; 580 e->e_flags |= EF_CLRQUEUE; 581 e->e_status = "5.6.0"; 582 usrerrenh(e->e_status, 583 "552 Headers too large (%d max)", 584 MaxHeadersLength); 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 } while (c == SM_IO_EOF && errno == EINTR); 625 if (c != SM_IO_EOF) 626 (void) sm_io_ungetc(fp, SM_TIME_DEFAULT, c); 627 if (c == ' ' || c == '\t') 628 { 629 /* yep -- defer this */ 630 continue; 631 } 632 633 /* trim off trailing CRLF or NL */ 634 SM_ASSERT(bp > buf); 635 if (*--bp != '\n' || *--bp != '\r') 636 bp++; 637 *bp = '\0'; 638 639 if (bitset(H_EOH, chompheader(buf, 640 CHHDR_CHECK | CHHDR_USER, 641 hdrp, e))) 642 { 643 mstate = MS_BODY; 644 goto nextstate; 645 } 646 numhdrs++; 647 break; 648 649 case MS_BODY: 650 if (tTd(30, 1)) 651 sm_dprintf("EOH\n"); 652 653 if (headeronly) 654 goto readerr; 655 656 df = collect_eoh(e, numhdrs, hdrslen); 657 if (df == NULL) 658 e->e_flags |= EF_TOOBIG; 659 660 bp = buf; 661 662 /* toss blank line */ 663 if ((!bitset(EF_CRLF_NOT_EOL, e->e_flags) && 664 bp[0] == '\r' && bp[1] == '\n') || 665 (!bitset(EF_NL_NOT_EOL, e->e_flags) && 666 bp[0] == '\n')) 667 { 668 break; 669 } 670 671 /* if not a blank separator, write it out */ 672 if (!bitset(EF_TOOBIG, e->e_flags)) 673 { 674 while (*bp != '\0') 675 (void) sm_io_putc(df, SM_TIME_DEFAULT, 676 *bp++); 677 } 678 break; 679 } 680 bp = buf; 681 } 682 683 readerr: 684 if ((sm_io_eof(fp) && smtpmode) || sm_io_error(fp)) 685 { 686 const char *errmsg; 687 688 if (sm_io_eof(fp)) 689 errmsg = "unexpected close"; 690 else 691 errmsg = sm_errstring(errno); 692 if (tTd(30, 1)) 693 sm_dprintf("collect: premature EOM: %s\n", errmsg); 694 if (LogLevel > 1) 695 sm_syslog(LOG_WARNING, e->e_id, 696 "collect: premature EOM: %s", errmsg); 697 inputerr = true; 698 } 699 700 /* reset global timer */ 701 if (CollectTimeout != NULL) 702 sm_clrevent(CollectTimeout); 703 704 if (headeronly) 705 return; 706 707 if (mstate != MS_BODY) 708 { 709 /* no body or discard, so we never opened the data file */ 710 SM_ASSERT(df == NULL); 711 df = collect_eoh(e, numhdrs, hdrslen); 712 } 713 714 if (df == NULL) 715 { 716 /* skip next few clauses */ 717 /* EMPTY */ 718 } 719 else if (sm_io_flush(df, SM_TIME_DEFAULT) != 0 || sm_io_error(df)) 720 { 721 dferror(df, "sm_io_flush||sm_io_error", e); 722 flush_errors(true); 723 finis(true, true, ExitStat); 724 /* NOTREACHED */ 725 } 726 else if (SuperSafe == SAFE_NO || 727 SuperSafe == SAFE_INTERACTIVE || 728 (SuperSafe == SAFE_REALLY_POSTMILTER && smtpmode)) 729 { 730 /* skip next few clauses */ 731 /* EMPTY */ 732 } 733 else if (sm_io_setinfo(df, SM_BF_COMMIT, NULL) < 0 && errno != EINVAL) 734 { 735 int save_errno = errno; 736 737 if (save_errno == EEXIST) 738 { 739 char *dfile; 740 struct stat st; 741 int dfd; 742 743 dfile = queuename(e, DATAFL_LETTER); 744 if (stat(dfile, &st) < 0) 745 st.st_size = -1; 746 errno = EEXIST; 747 syserr("@collect: bfcommit(%s): already on disk, size=%ld", 748 dfile, (long) st.st_size); 749 dfd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL); 750 if (dfd >= 0) 751 dumpfd(dfd, true, true); 752 } 753 errno = save_errno; 754 dferror(df, "bfcommit", e); 755 flush_errors(true); 756 finis(save_errno != EEXIST, true, ExitStat); 757 } 758 else if ((afd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL)) < 0) 759 { 760 dferror(df, "sm_io_getinfo", e); 761 flush_errors(true); 762 finis(true, true, ExitStat); 763 /* NOTREACHED */ 764 } 765 else if (fsync(afd) < 0) 766 { 767 dferror(df, "fsync", e); 768 flush_errors(true); 769 finis(true, true, ExitStat); 770 /* NOTREACHED */ 771 } 772 else if (sm_io_close(df, SM_TIME_DEFAULT) < 0) 773 { 774 dferror(df, "sm_io_close", e); 775 flush_errors(true); 776 finis(true, true, ExitStat); 777 /* NOTREACHED */ 778 } 779 else 780 { 781 /* everything is happily flushed to disk */ 782 df = NULL; 783 784 /* remove from available space in filesystem */ 785 updfs(e, false, true); 786 } 787 788 /* An EOF when running SMTP is an error */ 789 if (inputerr && (OpMode == MD_SMTP || OpMode == MD_DAEMON)) 790 { 791 char *host; 792 char *problem; 793 ADDRESS *q; 794 795 host = RealHostName; 796 if (host == NULL) 797 host = "localhost"; 798 799 if (sm_io_eof(fp)) 800 problem = "unexpected close"; 801 else if (sm_io_error(fp)) 802 problem = "I/O error"; 803 else 804 problem = "read timeout"; 805 if (LogLevel > 0 && sm_io_eof(fp)) 806 sm_syslog(LOG_NOTICE, e->e_id, 807 "collect: %s on connection from %.100s, sender=%s", 808 problem, host, 809 shortenstring(e->e_from.q_paddr, MAXSHORTSTR)); 810 if (sm_io_eof(fp)) 811 usrerr("451 4.4.1 collect: %s on connection from %s, from=%s", 812 problem, host, 813 shortenstring(e->e_from.q_paddr, MAXSHORTSTR)); 814 else 815 syserr("451 4.4.1 collect: %s on connection from %s, from=%s", 816 problem, host, 817 shortenstring(e->e_from.q_paddr, MAXSHORTSTR)); 818 819 /* don't return an error indication */ 820 e->e_to = NULL; 821 e->e_flags &= ~EF_FATALERRS; 822 e->e_flags |= EF_CLRQUEUE; 823 824 /* Don't send any message notification to sender */ 825 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 826 { 827 if (QS_IS_DEAD(q->q_state)) 828 continue; 829 q->q_state = QS_FATALERR; 830 } 831 832 finis(true, true, ExitStat); 833 /* NOTREACHED */ 834 } 835 836 /* Log collection information. */ 837 if (bitset(EF_LOGSENDER, e->e_flags) && LogLevel > 4) 838 { 839 logsender(e, e->e_msgid); 840 e->e_flags &= ~EF_LOGSENDER; 841 } 842 843 /* check for message too large */ 844 if (bitset(EF_TOOBIG, e->e_flags)) 845 { 846 e->e_flags |= EF_NO_BODY_RETN|EF_CLRQUEUE; 847 if (!bitset(EF_FATALERRS, e->e_flags)) 848 { 849 e->e_status = "5.2.3"; 850 usrerrenh(e->e_status, 851 "552 Message exceeds maximum fixed size (%ld)", 852 MaxMessageSize); 853 if (LogLevel > 6) 854 sm_syslog(LOG_NOTICE, e->e_id, 855 "message size (%ld) exceeds maximum (%ld)", 856 e->e_msgsize, MaxMessageSize); 857 } 858 } 859 860 /* check for illegal 8-bit data */ 861 if (HasEightBits) 862 { 863 e->e_flags |= EF_HAS8BIT; 864 if (!bitset(MM_PASS8BIT|MM_MIME8BIT, MimeMode) && 865 !bitset(EF_IS_MIME, e->e_flags)) 866 { 867 e->e_status = "5.6.1"; 868 usrerrenh(e->e_status, "554 Eight bit data not allowed"); 869 } 870 } 871 else 872 { 873 /* if it claimed to be 8 bits, well, it lied.... */ 874 if (e->e_bodytype != NULL && 875 sm_strcasecmp(e->e_bodytype, "8BITMIME") == 0) 876 e->e_bodytype = "7BIT"; 877 } 878 879 if (SuperSafe == SAFE_REALLY && !bitset(EF_FATALERRS, e->e_flags)) 880 { 881 char *dfname = queuename(e, DATAFL_LETTER); 882 if ((e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, dfname, 883 SM_IO_RDONLY_B, NULL)) == NULL) 884 { 885 /* we haven't acked receipt yet, so just chuck this */ 886 syserr("@Cannot reopen %s", dfname); 887 finis(true, true, ExitStat); 888 /* NOTREACHED */ 889 } 890 } 891 else 892 e->e_dfp = df; 893 894 /* collect statistics */ 895 if (OpMode != MD_VERIFY) 896 { 897 /* 898 ** Recalculate e_msgpriority, it is done at in eatheader() 899 ** which is called (in 8.12) after the header is collected, 900 ** hence e_msgsize is (most likely) incorrect. 901 */ 902 903 e->e_msgpriority = e->e_msgsize 904 - e->e_class * WkClassFact 905 + e->e_nrcpts * WkRecipFact; 906 markstats(e, (ADDRESS *) NULL, STATS_NORMAL); 907 } 908 } 909 910 static void 911 collecttimeout(timeout) 912 time_t timeout; 913 { 914 int save_errno = errno; 915 916 /* 917 ** NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER. DO NOT ADD 918 ** ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE 919 ** DOING. 920 */ 921 922 if (CollectProgress) 923 { 924 /* reset the timeout */ 925 CollectTimeout = sm_sigsafe_setevent(timeout, collecttimeout, 926 timeout); 927 CollectProgress = false; 928 } 929 else 930 { 931 /* event is done */ 932 CollectTimeout = NULL; 933 } 934 935 /* if no progress was made or problem resetting event, die now */ 936 if (CollectTimeout == NULL) 937 { 938 errno = ETIMEDOUT; 939 longjmp(CtxCollectTimeout, 1); 940 } 941 errno = save_errno; 942 } 943 /* 944 ** DFERROR -- signal error on writing the data file. 945 ** 946 ** Called by collect(). Collect() always terminates the process 947 ** immediately after calling dferror(), which means that the SMTP 948 ** session will be terminated, which means that any error message 949 ** issued by dferror must be a 421 error, as per RFC 821. 950 ** 951 ** Parameters: 952 ** df -- the file pointer for the data file. 953 ** msg -- detailed message. 954 ** e -- the current envelope. 955 ** 956 ** Returns: 957 ** none. 958 ** 959 ** Side Effects: 960 ** Gives an error message. 961 ** Arranges for following output to go elsewhere. 962 */ 963 964 void 965 dferror(df, msg, e) 966 SM_FILE_T *volatile df; 967 char *msg; 968 register ENVELOPE *e; 969 { 970 char *dfname; 971 972 dfname = queuename(e, DATAFL_LETTER); 973 setstat(EX_IOERR); 974 if (errno == ENOSPC) 975 { 976 #if STAT64 > 0 977 struct stat64 st; 978 #else /* STAT64 > 0 */ 979 struct stat st; 980 #endif /* STAT64 > 0 */ 981 long avail; 982 long bsize; 983 984 e->e_flags |= EF_NO_BODY_RETN; 985 986 if ( 987 #if STAT64 > 0 988 fstat64(sm_io_getinfo(df, SM_IO_WHAT_FD, NULL), &st) 989 #else /* STAT64 > 0 */ 990 fstat(sm_io_getinfo(df, SM_IO_WHAT_FD, NULL), &st) 991 #endif /* STAT64 > 0 */ 992 < 0) 993 st.st_size = 0; 994 (void) sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, dfname, 995 SM_IO_WRONLY_B, NULL, df); 996 if (st.st_size <= 0) 997 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 998 "\n*** Mail could not be accepted"); 999 else 1000 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 1001 "\n*** Mail of at least %llu bytes could not be accepted\n", 1002 (ULONGLONG_T) st.st_size); 1003 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 1004 "*** at %s due to lack of disk space for temp file.\n", 1005 MyHostName); 1006 avail = freediskspace(qid_printqueue(e->e_qgrp, e->e_qdir), 1007 &bsize); 1008 if (avail > 0) 1009 { 1010 if (bsize > 1024) 1011 avail *= bsize / 1024; 1012 else if (bsize < 1024) 1013 avail /= 1024 / bsize; 1014 (void) sm_io_fprintf(df, SM_TIME_DEFAULT, 1015 "*** Currently, %ld kilobytes are available for mail temp files.\n", 1016 avail); 1017 } 1018 #if 0 1019 /* Wrong response code; should be 421. */ 1020 e->e_status = "4.3.1"; 1021 usrerrenh(e->e_status, "452 Out of disk space for temp file"); 1022 #else /* 0 */ 1023 syserr("421 4.3.1 Out of disk space for temp file"); 1024 #endif /* 0 */ 1025 } 1026 else 1027 syserr("421 4.3.0 collect: Cannot write %s (%s, uid=%d, gid=%d)", 1028 dfname, msg, (int) geteuid(), (int) getegid()); 1029 if (sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, SM_PATH_DEVNULL, 1030 SM_IO_WRONLY, NULL, df) == NULL) 1031 sm_syslog(LOG_ERR, e->e_id, 1032 "dferror: sm_io_reopen(\"/dev/null\") failed: %s", 1033 sm_errstring(errno)); 1034 } 1035 /* 1036 ** EATFROM -- chew up a UNIX style from line and process 1037 ** 1038 ** This does indeed make some assumptions about the format 1039 ** of UNIX messages. 1040 ** 1041 ** Parameters: 1042 ** fm -- the from line. 1043 ** e -- envelope 1044 ** 1045 ** Returns: 1046 ** none. 1047 ** 1048 ** Side Effects: 1049 ** extracts what information it can from the header, 1050 ** such as the date. 1051 */ 1052 1053 #ifndef NOTUNIX 1054 1055 static char *DowList[] = 1056 { 1057 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL 1058 }; 1059 1060 static char *MonthList[] = 1061 { 1062 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 1063 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", 1064 NULL 1065 }; 1066 1067 static void 1068 eatfrom(fm, e) 1069 char *volatile fm; 1070 register ENVELOPE *e; 1071 { 1072 register char *p; 1073 register char **dt; 1074 1075 if (tTd(30, 2)) 1076 sm_dprintf("eatfrom(%s)\n", fm); 1077 1078 /* find the date part */ 1079 p = fm; 1080 while (*p != '\0') 1081 { 1082 /* skip a word */ 1083 while (*p != '\0' && *p != ' ') 1084 p++; 1085 while (*p == ' ') 1086 p++; 1087 if (strlen(p) < 17) 1088 { 1089 /* no room for the date */ 1090 return; 1091 } 1092 if (!(isascii(*p) && isupper(*p)) || 1093 p[3] != ' ' || p[13] != ':' || p[16] != ':') 1094 continue; 1095 1096 /* we have a possible date */ 1097 for (dt = DowList; *dt != NULL; dt++) 1098 if (strncmp(*dt, p, 3) == 0) 1099 break; 1100 if (*dt == NULL) 1101 continue; 1102 1103 for (dt = MonthList; *dt != NULL; dt++) 1104 { 1105 if (strncmp(*dt, &p[4], 3) == 0) 1106 break; 1107 } 1108 if (*dt != NULL) 1109 break; 1110 } 1111 1112 if (*p != '\0') 1113 { 1114 char *q, buf[25]; 1115 1116 /* we have found a date */ 1117 (void) sm_strlcpy(buf, p, sizeof(buf)); 1118 q = arpadate(buf); 1119 macdefine(&e->e_macro, A_TEMP, 'a', q); 1120 } 1121 } 1122 #endif /* ! NOTUNIX */ 1123