contrib/sendmail/src/collect.c

   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 8.273 2006/03/31 18:51:47 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);
  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);
 148                         break;
 149
 150                   case NRA_ADD_TO_UNDISCLOSED:
 151                         addheader("To", "undisclosed-recipients:;", 0, e);
 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);
 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                         /*
 556                         **  XXX Notice: the logic here is broken.
 557                         **  An input to sendmail that doesn't contain a
 558                         **  header but starts immediately with the body whose
 559                         **  first line contain characters which match the
 560                         **  following "if" will cause problems: those
 561                         **  characters will NOT appear in the output...
 562                         **  Do we care?
 563                         */
 564
 565                         if (c >= 0200 && c <= 0237)
 566                         {
 567 #if 0   /* causes complaints -- figure out something for 8.n+1 */
 568                                 usrerr("Illegal character 0x%x in header", c);
 569 #else /* 0 */
 570                                 /* EMPTY */
 571 #endif /* 0 */
 572                         }
 573                         else if (c != '\0')
 574                         {
 575                                 *bp++ = c;
 576                                 ++hdrslen;
 577                                 if (!headeronly &&
 578                                     MaxHeadersLength > 0 &&
 579                                     hdrslen > MaxHeadersLength)
 580                                 {
 581                                         sm_syslog(LOG_NOTICE, e->e_id,
 582                                                   "headers too large (%d max) from %s during message collect",
 583                                                   MaxHeadersLength,
 584                                                   CURHOSTNAME);
 585                                         errno = 0;
 586                                         e->e_flags |= EF_CLRQUEUE;
 587                                         e->e_status = "5.6.0";
 588                                         usrerrenh(e->e_status,
 589                                                   "552 Headers too large (%d max)",
 590                                                   MaxHeadersLength);
 591   discard:
 592                                         mstate = MS_DISCARD;
 593                                 }
 594                         }
 595                         if (istate == IS_BOL)
 596                                 break;
 597                 }
 598                 *bp = '\0';
 599
 600 nextstate:
 601                 if (tTd(30, 35))
 602                         sm_dprintf("nextstate, istate=%d, mstate=%d, line = \"%s\"\n",
 603                                 istate, mstate, buf);
 604                 switch (mstate)
 605                 {
 606                   case MS_UFROM:
 607                         mstate = MS_HEADER;
 608 #ifndef NOTUNIX
 609                         if (strncmp(buf, "From ", 5) == 0)
 610                         {
 611                                 bp = buf;
 612                                 eatfrom(buf, e);
 613                                 continue;
 614                         }
 615 #endif /* ! NOTUNIX */
 616                         /* FALLTHROUGH */
 617
 618                   case MS_HEADER:
 619                         if (!isheader(buf))
 620                         {
 621                                 mstate = MS_BODY;
 622                                 goto nextstate;
 623                         }
 624
 625                         /* check for possible continuation line */
 626                         do
 627                         {
 628                                 sm_io_clearerr(fp);
 629                                 errno = 0;
 630                                 c = sm_io_getc(fp, SM_TIME_DEFAULT);
 631
 632                                 /* timeout? */
 633                                 if (c == SM_IO_EOF && errno == EAGAIN
 634                                     && smtpmode)
 635                                 {
 636                                         /*
 637                                         **  Override e_message in
 638                                         **  usrerr() as this is the
 639                                         **  reason for failure that
 640                                         **  should be logged for
 641                                         **  undelivered recipients.
 642                                         */
 643
 644                                         e->e_message = NULL;
 645                                         errno = 0;
 646                                         inputerr = true;
 647                                         goto readabort;
 648                                 }
 649                         } while (c == SM_IO_EOF && errno == EINTR);
 650                         if (c != SM_IO_EOF)
 651                                 (void) sm_io_ungetc(fp, SM_TIME_DEFAULT, c);
 652                         if (c == ' ' || c == '\t')
 653                         {
 654                                 /* yep -- defer this */
 655                                 continue;
 656                         }
 657
 658                         SM_ASSERT(bp > buf);
 659
 660                         /* guaranteed by isheader(buf) */
 661                         SM_ASSERT(*(bp - 1) != '\n' || bp > buf + 1);
 662
 663                         /* trim off trailing CRLF or NL */
 664                         if (*--bp != '\n' || *--bp != '\r')
 665                                 bp++;
 666                         *bp = '\0';
 667
 668                         if (bitset(H_EOH, chompheader(buf,
 669                                                       CHHDR_CHECK | CHHDR_USER,
 670                                                       hdrp, e)))
 671                         {
 672                                 mstate = MS_BODY;
 673                                 goto nextstate;
 674                         }
 675                         numhdrs++;
 676                         break;
 677
 678                   case MS_BODY:
 679                         if (tTd(30, 1))
 680                                 sm_dprintf("EOH\n");
 681
 682                         if (headeronly)
 683                                 goto readerr;
 684
 685                         df = collect_eoh(e, numhdrs, hdrslen);
 686                         if (df == NULL)
 687                                 e->e_flags |= EF_TOOBIG;
 688
 689                         bp = buf;
 690
 691                         /* toss blank line */
 692                         if ((!bitset(EF_CRLF_NOT_EOL, e->e_flags) &&
 693                                 bp[0] == '\r' && bp[1] == '\n') ||
 694                             (!bitset(EF_NL_NOT_EOL, e->e_flags) &&
 695                                 bp[0] == '\n'))
 696                         {
 697                                 break;
 698                         }
 699
 700                         /* if not a blank separator, write it out */
 701                         if (!bitset(EF_TOOBIG, e->e_flags))
 702                         {
 703                                 while (*bp != '\0')
 704                                         (void) sm_io_putc(df, SM_TIME_DEFAULT,
 705                                                           *bp++);
 706                         }
 707                         break;
 708                 }
 709                 bp = buf;
 710         }
 711
 712 readerr:
 713         if ((sm_io_eof(fp) && smtpmode) || sm_io_error(fp))
 714         {
 715                 const char *errmsg;
 716
 717                 if (sm_io_eof(fp))
 718                         errmsg = "unexpected close";
 719                 else
 720                         errmsg = sm_errstring(errno);
 721                 if (tTd(30, 1))
 722                         sm_dprintf("collect: premature EOM: %s\n", errmsg);
 723                 if (LogLevel > 1)
 724                         sm_syslog(LOG_WARNING, e->e_id,
 725                                 "collect: premature EOM: %s", errmsg);
 726                 inputerr = true;
 727         }
 728
 729         if (headeronly)
 730                 return;
 731
 732         if (mstate != MS_BODY)
 733         {
 734                 /* no body or discard, so we never opened the data file */
 735                 SM_ASSERT(df == NULL);
 736                 df = collect_eoh(e, numhdrs, hdrslen);
 737         }
 738
 739         if (df == NULL)
 740         {
 741                 /* skip next few clauses */
 742                 /* EMPTY */
 743         }
 744         else if (sm_io_flush(df, SM_TIME_DEFAULT) != 0 || sm_io_error(df))
 745         {
 746                 dferror(df, "sm_io_flush||sm_io_error", e);
 747                 flush_errors(true);
 748                 finis(true, true, ExitStat);
 749                 /* NOTREACHED */
 750         }
 751         else if (SuperSafe == SAFE_NO ||
 752                  SuperSafe == SAFE_INTERACTIVE ||
 753                  (SuperSafe == SAFE_REALLY_POSTMILTER && smtpmode))
 754         {
 755                 /* skip next few clauses */
 756                 /* EMPTY */
 757                 /* Note: updfs() is not called in this case! */
 758         }
 759         else if (sm_io_setinfo(df, SM_BF_COMMIT, NULL) < 0 && errno != EINVAL)
 760         {
 761                 int save_errno = errno;
 762
 763                 if (save_errno == EEXIST)
 764                 {
 765                         char *dfile;
 766                         struct stat st;
 767                         int dfd;
 768
 769                         dfile = queuename(e, DATAFL_LETTER);
 770                         if (stat(dfile, &st) < 0)
 771                                 st.st_size = -1;
 772                         errno = EEXIST;
 773                         syserr("@collect: bfcommit(%s): already on disk, size=%ld",
 774                                dfile, (long) st.st_size);
 775                         dfd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL);
 776                         if (dfd >= 0)
 777                                 dumpfd(dfd, true, true);
 778                 }
 779                 errno = save_errno;
 780                 dferror(df, "bfcommit", e);
 781                 flush_errors(true);
 782                 finis(save_errno != EEXIST, true, ExitStat);
 783         }
 784         else if ((afd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL)) < 0)
 785         {
 786                 dferror(df, "sm_io_getinfo", e);
 787                 flush_errors(true);
 788                 finis(true, true, ExitStat);
 789                 /* NOTREACHED */
 790         }
 791         else if (fsync(afd) < 0)
 792         {
 793                 dferror(df, "fsync", e);
 794                 flush_errors(true);
 795                 finis(true, true, ExitStat);
 796                 /* NOTREACHED */
 797         }
 798         else if (sm_io_close(df, SM_TIME_DEFAULT) < 0)
 799         {
 800                 dferror(df, "sm_io_close", e);
 801                 flush_errors(true);
 802                 finis(true, true, ExitStat);
 803                 /* NOTREACHED */
 804         }
 805         else
 806         {
 807                 /* everything is happily flushed to disk */
 808                 df = NULL;
 809
 810                 /* remove from available space in filesystem */
 811                 updfs(e, 0, 1, "collect");
 812         }
 813
 814         /* An EOF when running SMTP is an error */
 815   readabort:
 816         if (inputerr && (OpMode == MD_SMTP || OpMode == MD_DAEMON))
 817         {
 818                 char *host;
 819                 char *problem;
 820                 ADDRESS *q;
 821
 822                 host = RealHostName;
 823                 if (host == NULL)
 824                         host = "localhost";
 825
 826                 if (sm_io_eof(fp))
 827                         problem = "unexpected close";
 828                 else if (sm_io_error(fp))
 829                         problem = "I/O error";
 830                 else
 831                         problem = "read timeout";
 832                 if (LogLevel > 0 && sm_io_eof(fp))
 833                         sm_syslog(LOG_NOTICE, e->e_id,
 834                                 "collect: %s on connection from %.100s, sender=%s",
 835                                 problem, host,
 836                                 shortenstring(e->e_from.q_paddr, MAXSHORTSTR));
 837                 if (sm_io_eof(fp))
 838                         usrerr("421 4.4.1 collect: %s on connection from %s, from=%s",
 839                                 problem, host,
 840                                 shortenstring(e->e_from.q_paddr, MAXSHORTSTR));
 841                 else
 842                         syserr("421 4.4.1 collect: %s on connection from %s, from=%s",
 843                                 problem, host,
 844                                 shortenstring(e->e_from.q_paddr, MAXSHORTSTR));
 845                 flush_errors(true);
 846
 847                 /* don't return an error indication */
 848                 e->e_to = NULL;
 849                 e->e_flags &= ~EF_FATALERRS;
 850                 e->e_flags |= EF_CLRQUEUE;
 851
 852                 /* Don't send any message notification to sender */
 853                 for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 854                 {
 855                         if (QS_IS_DEAD(q->q_state))
 856                                 continue;
 857                         q->q_state = QS_FATALERR;
 858                 }
 859
 860                 (void) sm_io_close(df, SM_TIME_DEFAULT);
 861                 df = NULL;
 862                 finis(true, true, ExitStat);
 863                 /* NOTREACHED */
 864         }
 865
 866         /* Log collection information. */
 867         if (bitset(EF_LOGSENDER, e->e_flags) && LogLevel > 4)
 868         {
 869                 logsender(e, e->e_msgid);
 870                 e->e_flags &= ~EF_LOGSENDER;
 871         }
 872
 873         /* check for message too large */
 874         if (bitset(EF_TOOBIG, e->e_flags))
 875         {
 876                 e->e_flags |= EF_NO_BODY_RETN|EF_CLRQUEUE;
 877                 if (!bitset(EF_FATALERRS, e->e_flags))
 878                 {
 879                         e->e_status = "5.2.3";
 880                         usrerrenh(e->e_status,
 881                                 "552 Message exceeds maximum fixed size (%ld)",
 882                                 MaxMessageSize);
 883                         if (LogLevel > 6)
 884                                 sm_syslog(LOG_NOTICE, e->e_id,
 885                                         "message size (%ld) exceeds maximum (%ld)",
 886                                         e->e_msgsize, MaxMessageSize);
 887                 }
 888         }
 889
 890         /* check for illegal 8-bit data */
 891         if (HasEightBits)
 892         {
 893                 e->e_flags |= EF_HAS8BIT;
 894                 if (!bitset(MM_PASS8BIT|MM_MIME8BIT, MimeMode) &&
 895                     !bitset(EF_IS_MIME, e->e_flags))
 896                 {
 897                         e->e_status = "5.6.1";
 898                         usrerrenh(e->e_status, "554 Eight bit data not allowed");
 899                 }
 900         }
 901         else
 902         {
 903                 /* if it claimed to be 8 bits, well, it lied.... */
 904                 if (e->e_bodytype != NULL &&
 905                     sm_strcasecmp(e->e_bodytype, "8BITMIME") == 0)
 906                         e->e_bodytype = "7BIT";
 907         }
 908
 909         if (SuperSafe == SAFE_REALLY && !bitset(EF_FATALERRS, e->e_flags))
 910         {
 911                 char *dfname = queuename(e, DATAFL_LETTER);
 912                 if ((e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, dfname,
 913                                            SM_IO_RDONLY_B, NULL)) == NULL)
 914                 {
 915                         /* we haven't acked receipt yet, so just chuck this */
 916                         syserr("@Cannot reopen %s", dfname);
 917                         finis(true, true, ExitStat);
 918                         /* NOTREACHED */
 919                 }
 920         }
 921         else
 922                 e->e_dfp = df;
 923
 924         /* collect statistics */
 925         if (OpMode != MD_VERIFY)
 926         {
 927                 /*
 928                 **  Recalculate e_msgpriority, it is done at in eatheader()
 929                 **  which is called (in 8.12) after the header is collected,
 930                 **  hence e_msgsize is (most likely) incorrect.
 931                 */
 932
 933                 e->e_msgpriority = e->e_msgsize
 934                                  - e->e_class * WkClassFact
 935                                  + e->e_nrcpts * WkRecipFact;
 936                 markstats(e, (ADDRESS *) NULL, STATS_NORMAL);
 937         }
 938 }
 939
 940 /*
 941 **  DFERROR -- signal error on writing the data file.
 942 **
 943 **      Called by collect().  Collect() always terminates the process
 944 **      immediately after calling dferror(), which means that the SMTP
 945 **      session will be terminated, which means that any error message
 946 **      issued by dferror must be a 421 error, as per RFC 821.
 947 **
 948 **      Parameters:
 949 **              df -- the file pointer for the data file.
 950 **              msg -- detailed message.
 951 **              e -- the current envelope.
 952 **
 953 **      Returns:
 954 **              none.
 955 **
 956 **      Side Effects:
 957 **              Gives an error message.
 958 **              Arranges for following output to go elsewhere.
 959 */
 960
 961 void
 962 dferror(df, msg, e)
 963         SM_FILE_T *volatile df;
 964         char *msg;
 965         register ENVELOPE *e;
 966 {
 967         char *dfname;
 968
 969         dfname = queuename(e, DATAFL_LETTER);
 970         setstat(EX_IOERR);
 971         if (errno == ENOSPC)
 972         {
 973 #if STAT64 > 0
 974                 struct stat64 st;
 975 #else /* STAT64 > 0 */
 976                 struct stat st;
 977 #endif /* STAT64 > 0 */
 978                 long avail;
 979                 long bsize;
 980
 981                 e->e_flags |= EF_NO_BODY_RETN;
 982
 983                 if (
 984 #if STAT64 > 0
 985                     fstat64(sm_io_getinfo(df, SM_IO_WHAT_FD, NULL), &st)
 986 #else /* STAT64 > 0 */
 987                     fstat(sm_io_getinfo(df, SM_IO_WHAT_FD, NULL), &st)
 988 #endif /* STAT64 > 0 */
 989                     < 0)
 990                   st.st_size = 0;
 991                 (void) sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, dfname,
 992                                     SM_IO_WRONLY_B, NULL, df);
 993                 if (st.st_size <= 0)
 994                         (void) sm_io_fprintf(df, SM_TIME_DEFAULT,
 995                                 "\n*** Mail could not be accepted");
 996                 else
 997                         (void) sm_io_fprintf(df, SM_TIME_DEFAULT,
 998                                 "\n*** Mail of at least %llu bytes could not be accepted\n",
 999                                 (ULONGLONG_T) st.st_size);
1000                 (void) sm_io_fprintf(df, SM_TIME_DEFAULT,
1001                         "*** at %s due to lack of disk space for temp file.\n",
1002                         MyHostName);
1003                 avail = freediskspace(qid_printqueue(e->e_qgrp, e->e_qdir),
1004                                       &bsize);
1005                 if (avail > 0)
1006                 {
1007                         if (bsize > 1024)
1008                                 avail *= bsize / 1024;
1009                         else if (bsize < 1024)
1010                                 avail /= 1024 / bsize;
1011                         (void) sm_io_fprintf(df, SM_TIME_DEFAULT,
1012                                 "*** Currently, %ld kilobytes are available for mail temp files.\n",
1013                                 avail);
1014                 }
1015 #if 0
1016                 /* Wrong response code; should be 421. */
1017                 e->e_status = "4.3.1";
1018                 usrerrenh(e->e_status, "452 Out of disk space for temp file");
1019 #else /* 0 */
1020                 syserr("421 4.3.1 Out of disk space for temp file");
1021 #endif /* 0 */
1022         }
1023         else
1024                 syserr("421 4.3.0 collect: Cannot write %s (%s, uid=%d, gid=%d)",
1025                         dfname, msg, (int) geteuid(), (int) getegid());
1026         if (sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, SM_PATH_DEVNULL,
1027                          SM_IO_WRONLY, NULL, df) == NULL)
1028                 sm_syslog(LOG_ERR, e->e_id,
1029                           "dferror: sm_io_reopen(\"/dev/null\") failed: %s",
1030                           sm_errstring(errno));
1031 }
1032 /*
1033 **  EATFROM -- chew up a UNIX style from line and process
1034 **
1035 **      This does indeed make some assumptions about the format
1036 **      of UNIX messages.
1037 **
1038 **      Parameters:
1039 **              fm -- the from line.
1040 **              e -- envelope
1041 **
1042 **      Returns:
1043 **              none.
1044 **
1045 **      Side Effects:
1046 **              extracts what information it can from the header,
1047 **              such as the date.
1048 */
1049
1050 #ifndef NOTUNIX
1051
1052 static char     *DowList[] =
1053 {
1054         "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL
1055 };
1056
1057 static char     *MonthList[] =
1058 {
1059         "Jan", "Feb", "Mar", "Apr", "May", "Jun",
1060         "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
1061         NULL
1062 };
1063
1064 static void
1065 eatfrom(fm, e)
1066         char *volatile fm;
1067         register ENVELOPE *e;
1068 {
1069         register char *p;
1070         register char **dt;
1071
1072         if (tTd(30, 2))
1073                 sm_dprintf("eatfrom(%s)\n", fm);
1074
1075         /* find the date part */
1076         p = fm;
1077         while (*p != '\0')
1078         {
1079                 /* skip a word */
1080                 while (*p != '\0' && *p != ' ')
1081                         p++;
1082                 while (*p == ' ')
1083                         p++;
1084                 if (strlen(p) < 17)
1085                 {
1086                         /* no room for the date */
1087                         return;
1088                 }
1089                 if (!(isascii(*p) && isupper(*p)) ||
1090                     p[3] != ' ' || p[13] != ':' || p[16] != ':')
1091                         continue;
1092
1093                 /* we have a possible date */
1094                 for (dt = DowList; *dt != NULL; dt++)
1095                         if (strncmp(*dt, p, 3) == 0)
1096                                 break;
1097                 if (*dt == NULL)
1098                         continue;
1099
1100                 for (dt = MonthList; *dt != NULL; dt++)
1101                 {
1102                         if (strncmp(*dt, &p[4], 3) == 0)
1103                                 break;
1104                 }
1105                 if (*dt != NULL)
1106                         break;
1107         }
1108
1109         if (*p != '\0')
1110         {
1111                 char *q, buf[25];
1112
1113                 /* we have found a date */
1114                 (void) sm_strlcpy(buf, p, sizeof(buf));
1115                 q = arpadate(buf);
1116                 macdefine(&e->e_macro, A_TEMP, 'a', q);
1117         }
1118 }
1119 #endif /* ! NOTUNIX */