contrib/sendmail/src/collect.c

   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 */