contrib/sendmail-8.14/sendmail/deliver.c

   1 /*
   2  * Copyright (c) 1998-2008 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 #include <sm/time.h>
  16
  17 SM_RCSID("@(#)$Id: deliver.c,v 8.1020 2009/12/18 17:08:01 ca Exp $")
  18
  19 #if HASSETUSERCONTEXT
  20 # include <login_cap.h>
  21 #endif /* HASSETUSERCONTEXT */
  22
  23 #if NETINET || NETINET6
  24 # include <arpa/inet.h>
  25 #endif /* NETINET || NETINET6 */
  26
  27 #if STARTTLS || SASL
  28 # include "sfsasl.h"
  29 #endif /* STARTTLS || SASL */
  30
  31 static int      deliver __P((ENVELOPE *, ADDRESS *));
  32 static void     dup_queue_file __P((ENVELOPE *, ENVELOPE *, int));
  33 static void     mailfiletimeout __P((int));
  34 static void     endwaittimeout __P((int));
  35 static int      parse_hostsignature __P((char *, char **, MAILER *));
  36 static void     sendenvelope __P((ENVELOPE *, int));
  37 static int      coloncmp __P((const char *, const char *));
  38
  39 #if STARTTLS
  40 static int      starttls __P((MAILER *, MCI *, ENVELOPE *));
  41 static int      endtlsclt __P((MCI *));
  42 #endif /* STARTTLS */
  43 # if STARTTLS || SASL
  44 static bool     iscltflgset __P((ENVELOPE *, int));
  45 # endif /* STARTTLS || SASL */
  46
  47 /*
  48 **  SENDALL -- actually send all the messages.
  49 **
  50 **      Parameters:
  51 **              e -- the envelope to send.
  52 **              mode -- the delivery mode to use.  If SM_DEFAULT, use
  53 **                      the current e->e_sendmode.
  54 **
  55 **      Returns:
  56 **              none.
  57 **
  58 **      Side Effects:
  59 **              Scans the send lists and sends everything it finds.
  60 **              Delivers any appropriate error messages.
  61 **              If we are running in a non-interactive mode, takes the
  62 **                      appropriate action.
  63 */
  64
  65 void
  66 sendall(e, mode)
  67         ENVELOPE *e;
  68         int mode;
  69 {
  70         register ADDRESS *q;
  71         char *owner;
  72         int otherowners;
  73         int save_errno;
  74         register ENVELOPE *ee;
  75         ENVELOPE *splitenv = NULL;
  76         int oldverbose = Verbose;
  77         bool somedeliveries = false, expensive = false;
  78         pid_t pid;
  79
  80         /*
  81         **  If this message is to be discarded, don't bother sending
  82         **  the message at all.
  83         */
  84
  85         if (bitset(EF_DISCARD, e->e_flags))
  86         {
  87                 if (tTd(13, 1))
  88                         sm_dprintf("sendall: discarding id %s\n", e->e_id);
  89                 e->e_flags |= EF_CLRQUEUE;
  90                 if (LogLevel > 9)
  91                         logundelrcpts(e, "discarded", 9, true);
  92                 else if (LogLevel > 4)
  93                         sm_syslog(LOG_INFO, e->e_id, "discarded");
  94                 markstats(e, NULL, STATS_REJECT);
  95                 return;
  96         }
  97
  98         /*
  99         **  If we have had global, fatal errors, don't bother sending
 100         **  the message at all if we are in SMTP mode.  Local errors
 101         **  (e.g., a single address failing) will still cause the other
 102         **  addresses to be sent.
 103         */
 104
 105         if (bitset(EF_FATALERRS, e->e_flags) &&
 106             (OpMode == MD_SMTP || OpMode == MD_DAEMON))
 107         {
 108                 e->e_flags |= EF_CLRQUEUE;
 109                 return;
 110         }
 111
 112         /* determine actual delivery mode */
 113         if (mode == SM_DEFAULT)
 114         {
 115                 mode = e->e_sendmode;
 116                 if (mode != SM_VERIFY && mode != SM_DEFER &&
 117                     shouldqueue(e->e_msgpriority, e->e_ctime))
 118                         mode = SM_QUEUE;
 119         }
 120
 121         if (tTd(13, 1))
 122         {
 123                 sm_dprintf("\n===== SENDALL: mode %c, id %s, e_from ",
 124                         mode, e->e_id);
 125                 printaddr(sm_debug_file(), &e->e_from, false);
 126                 sm_dprintf("\te_flags = ");
 127                 printenvflags(e);
 128                 sm_dprintf("sendqueue:\n");
 129                 printaddr(sm_debug_file(), e->e_sendqueue, true);
 130         }
 131
 132         /*
 133         **  Do any preprocessing necessary for the mode we are running.
 134         **      Check to make sure the hop count is reasonable.
 135         **      Delete sends to the sender in mailing lists.
 136         */
 137
 138         CurEnv = e;
 139         if (tTd(62, 1))
 140                 checkfds(NULL);
 141
 142         if (e->e_hopcount > MaxHopCount)
 143         {
 144                 char *recip;
 145
 146                 if (e->e_sendqueue != NULL &&
 147                     e->e_sendqueue->q_paddr != NULL)
 148                         recip = e->e_sendqueue->q_paddr;
 149                 else
 150                         recip = "(nobody)";
 151
 152                 errno = 0;
 153                 queueup(e, WILL_BE_QUEUED(mode), false);
 154                 e->e_flags |= EF_FATALERRS|EF_PM_NOTIFY|EF_CLRQUEUE;
 155                 ExitStat = EX_UNAVAILABLE;
 156                 syserr("554 5.4.6 Too many hops %d (%d max): from %s via %s, to %s",
 157                        e->e_hopcount, MaxHopCount, e->e_from.q_paddr,
 158                        RealHostName == NULL ? "localhost" : RealHostName,
 159                        recip);
 160                 for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 161                 {
 162                         if (QS_IS_DEAD(q->q_state))
 163                                 continue;
 164                         q->q_state = QS_BADADDR;
 165                         q->q_status = "5.4.6";
 166                         q->q_rstatus = "554 5.4.6 Too many hops";
 167                 }
 168                 return;
 169         }
 170
 171         /*
 172         **  Do sender deletion.
 173         **
 174         **      If the sender should be queued up, skip this.
 175         **      This can happen if the name server is hosed when you
 176         **      are trying to send mail.  The result is that the sender
 177         **      is instantiated in the queue as a recipient.
 178         */
 179
 180         if (!bitset(EF_METOO, e->e_flags) &&
 181             !QS_IS_QUEUEUP(e->e_from.q_state))
 182         {
 183                 if (tTd(13, 5))
 184                 {
 185                         sm_dprintf("sendall: QS_SENDER ");
 186                         printaddr(sm_debug_file(), &e->e_from, false);
 187                 }
 188                 e->e_from.q_state = QS_SENDER;
 189                 (void) recipient(&e->e_from, &e->e_sendqueue, 0, e);
 190         }
 191
 192         /*
 193         **  Handle alias owners.
 194         **
 195         **      We scan up the q_alias chain looking for owners.
 196         **      We discard owners that are the same as the return path.
 197         */
 198
 199         for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 200         {
 201                 register struct address *a;
 202
 203                 for (a = q; a != NULL && a->q_owner == NULL; a = a->q_alias)
 204                         continue;
 205                 if (a != NULL)
 206                         q->q_owner = a->q_owner;
 207
 208                 if (q->q_owner != NULL &&
 209                     !QS_IS_DEAD(q->q_state) &&
 210                     strcmp(q->q_owner, e->e_from.q_paddr) == 0)
 211                         q->q_owner = NULL;
 212         }
 213
 214         if (tTd(13, 25))
 215         {
 216                 sm_dprintf("\nAfter first owner pass, sendq =\n");
 217                 printaddr(sm_debug_file(), e->e_sendqueue, true);
 218         }
 219
 220         owner = "";
 221         otherowners = 1;
 222         while (owner != NULL && otherowners > 0)
 223         {
 224                 if (tTd(13, 28))
 225                         sm_dprintf("owner = \"%s\", otherowners = %d\n",
 226                                    owner, otherowners);
 227                 owner = NULL;
 228                 otherowners = bitset(EF_SENDRECEIPT, e->e_flags) ? 1 : 0;
 229
 230                 for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 231                 {
 232                         if (tTd(13, 30))
 233                         {
 234                                 sm_dprintf("Checking ");
 235                                 printaddr(sm_debug_file(), q, false);
 236                         }
 237                         if (QS_IS_DEAD(q->q_state))
 238                         {
 239                                 if (tTd(13, 30))
 240                                         sm_dprintf("    ... QS_IS_DEAD\n");
 241                                 continue;
 242                         }
 243                         if (tTd(13, 29) && !tTd(13, 30))
 244                         {
 245                                 sm_dprintf("Checking ");
 246                                 printaddr(sm_debug_file(), q, false);
 247                         }
 248
 249                         if (q->q_owner != NULL)
 250                         {
 251                                 if (owner == NULL)
 252                                 {
 253                                         if (tTd(13, 40))
 254                                                 sm_dprintf("    ... First owner = \"%s\"\n",
 255                                                            q->q_owner);
 256                                         owner = q->q_owner;
 257                                 }
 258                                 else if (owner != q->q_owner)
 259                                 {
 260                                         if (strcmp(owner, q->q_owner) == 0)
 261                                         {
 262                                                 if (tTd(13, 40))
 263                                                         sm_dprintf("    ... Same owner = \"%s\"\n",
 264                                                                    owner);
 265
 266                                                 /* make future comparisons cheap */
 267                                                 q->q_owner = owner;
 268                                         }
 269                                         else
 270                                         {
 271                                                 if (tTd(13, 40))
 272                                                         sm_dprintf("    ... Another owner \"%s\"\n",
 273                                                                    q->q_owner);
 274                                                 otherowners++;
 275                                         }
 276                                         owner = q->q_owner;
 277                                 }
 278                                 else if (tTd(13, 40))
 279                                         sm_dprintf("    ... Same owner = \"%s\"\n",
 280                                                    owner);
 281                         }
 282                         else
 283                         {
 284                                 if (tTd(13, 40))
 285                                         sm_dprintf("    ... Null owner\n");
 286                                 otherowners++;
 287                         }
 288
 289                         if (QS_IS_BADADDR(q->q_state))
 290                         {
 291                                 if (tTd(13, 30))
 292                                         sm_dprintf("    ... QS_IS_BADADDR\n");
 293                                 continue;
 294                         }
 295
 296                         if (QS_IS_QUEUEUP(q->q_state))
 297                         {
 298                                 MAILER *m = q->q_mailer;
 299
 300                                 /*
 301                                 **  If we have temporary address failures
 302                                 **  (e.g., dns failure) and a fallback MX is
 303                                 **  set, send directly to the fallback MX host.
 304                                 */
 305
 306                                 if (FallbackMX != NULL &&
 307                                     !wordinclass(FallbackMX, 'w') &&
 308                                     mode != SM_VERIFY &&
 309                                     !bitnset(M_NOMX, m->m_flags) &&
 310                                     strcmp(m->m_mailer, "[IPC]") == 0 &&
 311                                     m->m_argv[0] != NULL &&
 312                                     strcmp(m->m_argv[0], "TCP") == 0)
 313                                 {
 314                                         int len;
 315                                         char *p;
 316
 317                                         if (tTd(13, 30))
 318                                                 sm_dprintf("    ... FallbackMX\n");
 319
 320                                         len = strlen(FallbackMX) + 1;
 321                                         p = sm_rpool_malloc_x(e->e_rpool, len);
 322                                         (void) sm_strlcpy(p, FallbackMX, len);
 323                                         q->q_state = QS_OK;
 324                                         q->q_host = p;
 325                                 }
 326                                 else
 327                                 {
 328                                         if (tTd(13, 30))
 329                                                 sm_dprintf("    ... QS_IS_QUEUEUP\n");
 330                                         continue;
 331                                 }
 332                         }
 333
 334                         /*
 335                         **  If this mailer is expensive, and if we don't
 336                         **  want to make connections now, just mark these
 337                         **  addresses and return.  This is useful if we
 338                         **  want to batch connections to reduce load.  This
 339                         **  will cause the messages to be queued up, and a
 340                         **  daemon will come along to send the messages later.
 341                         */
 342
 343                         if (NoConnect && !Verbose &&
 344                             bitnset(M_EXPENSIVE, q->q_mailer->m_flags))
 345                         {
 346                                 if (tTd(13, 30))
 347                                         sm_dprintf("    ... expensive\n");
 348                                 q->q_state = QS_QUEUEUP;
 349                                 expensive = true;
 350                         }
 351                         else if (bitnset(M_HOLD, q->q_mailer->m_flags) &&
 352                                  QueueLimitId == NULL &&
 353                                  QueueLimitSender == NULL &&
 354                                  QueueLimitRecipient == NULL)
 355                         {
 356                                 if (tTd(13, 30))
 357                                         sm_dprintf("    ... hold\n");
 358                                 q->q_state = QS_QUEUEUP;
 359                                 expensive = true;
 360                         }
 361                         else if (QueueMode != QM_QUARANTINE &&
 362                                  e->e_quarmsg != NULL)
 363                         {
 364                                 if (tTd(13, 30))
 365                                         sm_dprintf("    ... quarantine: %s\n",
 366                                                    e->e_quarmsg);
 367                                 q->q_state = QS_QUEUEUP;
 368                                 expensive = true;
 369                         }
 370                         else
 371                         {
 372                                 if (tTd(13, 30))
 373                                         sm_dprintf("    ... deliverable\n");
 374                                 somedeliveries = true;
 375                         }
 376                 }
 377
 378                 if (owner != NULL && otherowners > 0)
 379                 {
 380                         /*
 381                         **  Split this envelope into two.
 382                         */
 383
 384                         ee = (ENVELOPE *) sm_rpool_malloc_x(e->e_rpool,
 385                                                             sizeof(*ee));
 386                         STRUCTCOPY(*e, *ee);
 387                         ee->e_message = NULL;
 388                         ee->e_id = NULL;
 389                         assign_queueid(ee);
 390
 391                         if (tTd(13, 1))
 392                                 sm_dprintf("sendall: split %s into %s, owner = \"%s\", otherowners = %d\n",
 393                                            e->e_id, ee->e_id, owner,
 394                                            otherowners);
 395
 396                         ee->e_header = copyheader(e->e_header, ee->e_rpool);
 397                         ee->e_sendqueue = copyqueue(e->e_sendqueue,
 398                                                     ee->e_rpool);
 399                         ee->e_errorqueue = copyqueue(e->e_errorqueue,
 400                                                      ee->e_rpool);
 401                         ee->e_flags = e->e_flags & ~(EF_INQUEUE|EF_CLRQUEUE|EF_FATALERRS|EF_SENDRECEIPT|EF_RET_PARAM);
 402                         ee->e_flags |= EF_NORECEIPT;
 403                         setsender(owner, ee, NULL, '\0', true);
 404                         if (tTd(13, 5))
 405                         {
 406                                 sm_dprintf("sendall(split): QS_SENDER ");
 407                                 printaddr(sm_debug_file(), &ee->e_from, false);
 408                         }
 409                         ee->e_from.q_state = QS_SENDER;
 410                         ee->e_dfp = NULL;
 411                         ee->e_lockfp = NULL;
 412                         ee->e_xfp = NULL;
 413                         ee->e_qgrp = e->e_qgrp;
 414                         ee->e_qdir = e->e_qdir;
 415                         ee->e_errormode = EM_MAIL;
 416                         ee->e_sibling = splitenv;
 417                         ee->e_statmsg = NULL;
 418                         if (e->e_quarmsg != NULL)
 419                                 ee->e_quarmsg = sm_rpool_strdup_x(ee->e_rpool,
 420                                                                   e->e_quarmsg);
 421                         splitenv = ee;
 422
 423                         for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 424                         {
 425                                 if (q->q_owner == owner)
 426                                 {
 427                                         q->q_state = QS_CLONED;
 428                                         if (tTd(13, 6))
 429                                                 sm_dprintf("\t... stripping %s from original envelope\n",
 430                                                            q->q_paddr);
 431                                 }
 432                         }
 433                         for (q = ee->e_sendqueue; q != NULL; q = q->q_next)
 434                         {
 435                                 if (q->q_owner != owner)
 436                                 {
 437                                         q->q_state = QS_CLONED;
 438                                         if (tTd(13, 6))
 439                                                 sm_dprintf("\t... dropping %s from cloned envelope\n",
 440                                                            q->q_paddr);
 441                                 }
 442                                 else
 443                                 {
 444                                         /* clear DSN parameters */
 445                                         q->q_flags &= ~(QHASNOTIFY|Q_PINGFLAGS);
 446                                         q->q_flags |= DefaultNotify & ~QPINGONSUCCESS;
 447                                         if (tTd(13, 6))
 448                                                 sm_dprintf("\t... moving %s to cloned envelope\n",
 449                                                            q->q_paddr);
 450                                 }
 451                         }
 452
 453                         if (mode != SM_VERIFY && bitset(EF_HAS_DF, e->e_flags))
 454                                 dup_queue_file(e, ee, DATAFL_LETTER);
 455
 456                         /*
 457                         **  Give the split envelope access to the parent
 458                         **  transcript file for errors obtained while
 459                         **  processing the recipients (done before the
 460                         **  envelope splitting).
 461                         */
 462
 463                         if (e->e_xfp != NULL)
 464                                 ee->e_xfp = sm_io_dup(e->e_xfp);
 465
 466                         /* failed to dup e->e_xfp, start a new transcript */
 467                         if (ee->e_xfp == NULL)
 468                                 openxscript(ee);
 469
 470                         if (mode != SM_VERIFY && LogLevel > 4)
 471                                 sm_syslog(LOG_INFO, e->e_id,
 472                                           "%s: clone: owner=%s",
 473                                           ee->e_id, owner);
 474                 }
 475         }
 476
 477         if (owner != NULL)
 478         {
 479                 setsender(owner, e, NULL, '\0', true);
 480                 if (tTd(13, 5))
 481                 {
 482                         sm_dprintf("sendall(owner): QS_SENDER ");
 483                         printaddr(sm_debug_file(), &e->e_from, false);
 484                 }
 485                 e->e_from.q_state = QS_SENDER;
 486                 e->e_errormode = EM_MAIL;
 487                 e->e_flags |= EF_NORECEIPT;
 488                 e->e_flags &= ~EF_FATALERRS;
 489         }
 490
 491         /* if nothing to be delivered, just queue up everything */
 492         if (!somedeliveries && !WILL_BE_QUEUED(mode) &&
 493             mode != SM_VERIFY)
 494         {
 495                 time_t now;
 496
 497                 if (tTd(13, 29))
 498                         sm_dprintf("No deliveries: auto-queueing\n");
 499                 mode = SM_QUEUE;
 500                 now = curtime();
 501
 502                 /* treat this as a delivery in terms of counting tries */
 503                 e->e_dtime = now;
 504                 if (!expensive)
 505                         e->e_ntries++;
 506                 for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 507                 {
 508                         ee->e_dtime = now;
 509                         if (!expensive)
 510                                 ee->e_ntries++;
 511                 }
 512         }
 513
 514         if ((WILL_BE_QUEUED(mode) || mode == SM_FORK ||
 515              (mode != SM_VERIFY &&
 516               (SuperSafe == SAFE_REALLY ||
 517                SuperSafe == SAFE_REALLY_POSTMILTER))) &&
 518             (!bitset(EF_INQUEUE, e->e_flags) || splitenv != NULL))
 519         {
 520                 bool msync;
 521
 522                 /*
 523                 **  Be sure everything is instantiated in the queue.
 524                 **  Split envelopes first in case the machine crashes.
 525                 **  If the original were done first, we may lose
 526                 **  recipients.
 527                 */
 528
 529 #if !HASFLOCK
 530                 msync = false;
 531 #else /* !HASFLOCK */
 532                 msync = mode == SM_FORK;
 533 #endif /* !HASFLOCK */
 534
 535                 for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 536                         queueup(ee, WILL_BE_QUEUED(mode), msync);
 537                 queueup(e, WILL_BE_QUEUED(mode), msync);
 538         }
 539
 540         if (tTd(62, 10))
 541                 checkfds("after envelope splitting");
 542
 543         /*
 544         **  If we belong in background, fork now.
 545         */
 546
 547         if (tTd(13, 20))
 548         {
 549                 sm_dprintf("sendall: final mode = %c\n", mode);
 550                 if (tTd(13, 21))
 551                 {
 552                         sm_dprintf("\n================ Final Send Queue(s) =====================\n");
 553                         sm_dprintf("\n  *** Envelope %s, e_from=%s ***\n",
 554                                    e->e_id, e->e_from.q_paddr);
 555                         printaddr(sm_debug_file(), e->e_sendqueue, true);
 556                         for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 557                         {
 558                                 sm_dprintf("\n  *** Envelope %s, e_from=%s ***\n",
 559                                            ee->e_id, ee->e_from.q_paddr);
 560                                 printaddr(sm_debug_file(), ee->e_sendqueue, true);
 561                         }
 562                         sm_dprintf("==========================================================\n\n");
 563                 }
 564         }
 565         switch (mode)
 566         {
 567           case SM_VERIFY:
 568                 Verbose = 2;
 569                 break;
 570
 571           case SM_QUEUE:
 572           case SM_DEFER:
 573 #if HASFLOCK
 574   queueonly:
 575 #endif /* HASFLOCK */
 576                 if (e->e_nrcpts > 0)
 577                         e->e_flags |= EF_INQUEUE;
 578                 (void) dropenvelope(e, splitenv != NULL, true);
 579                 for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 580                 {
 581                         if (ee->e_nrcpts > 0)
 582                                 ee->e_flags |= EF_INQUEUE;
 583                         (void) dropenvelope(ee, false, true);
 584                 }
 585                 return;
 586
 587           case SM_FORK:
 588                 if (e->e_xfp != NULL)
 589                         (void) sm_io_flush(e->e_xfp, SM_TIME_DEFAULT);
 590
 591 #if !HASFLOCK
 592                 /*
 593                 **  Since fcntl locking has the interesting semantic that
 594                 **  the lock is owned by a process, not by an open file
 595                 **  descriptor, we have to flush this to the queue, and
 596                 **  then restart from scratch in the child.
 597                 */
 598
 599                 {
 600                         /* save id for future use */
 601                         char *qid = e->e_id;
 602
 603                         /* now drop the envelope in the parent */
 604                         e->e_flags |= EF_INQUEUE;
 605                         (void) dropenvelope(e, splitenv != NULL, false);
 606
 607                         /* arrange to reacquire lock after fork */
 608                         e->e_id = qid;
 609                 }
 610
 611                 for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 612                 {
 613                         /* save id for future use */
 614                         char *qid = ee->e_id;
 615
 616                         /* drop envelope in parent */
 617                         ee->e_flags |= EF_INQUEUE;
 618                         (void) dropenvelope(ee, false, false);
 619
 620                         /* and save qid for reacquisition */
 621                         ee->e_id = qid;
 622                 }
 623
 624 #endif /* !HASFLOCK */
 625
 626                 /*
 627                 **  Since the delivery may happen in a child and the parent
 628                 **  does not wait, the parent may close the maps thereby
 629                 **  removing any shared memory used by the map.  Therefore,
 630                 **  close the maps now so the child will dynamically open
 631                 **  them if necessary.
 632                 */
 633
 634                 closemaps(false);
 635
 636                 pid = fork();
 637                 if (pid < 0)
 638                 {
 639                         syserr("deliver: fork 1");
 640 #if HASFLOCK
 641                         goto queueonly;
 642 #else /* HASFLOCK */
 643                         e->e_id = NULL;
 644                         for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 645                                 ee->e_id = NULL;
 646                         return;
 647 #endif /* HASFLOCK */
 648                 }
 649                 else if (pid > 0)
 650                 {
 651 #if HASFLOCK
 652                         /* be sure we leave the temp files to our child */
 653                         /* close any random open files in the envelope */
 654                         closexscript(e);
 655                         if (e->e_dfp != NULL)
 656                                 (void) sm_io_close(e->e_dfp, SM_TIME_DEFAULT);
 657                         e->e_dfp = NULL;
 658                         e->e_flags &= ~EF_HAS_DF;
 659
 660                         /* can't call unlockqueue to avoid unlink of xfp */
 661                         if (e->e_lockfp != NULL)
 662                                 (void) sm_io_close(e->e_lockfp, SM_TIME_DEFAULT);
 663                         else
 664                                 syserr("%s: sendall: null lockfp", e->e_id);
 665                         e->e_lockfp = NULL;
 666 #endif /* HASFLOCK */
 667
 668                         /* make sure the parent doesn't own the envelope */
 669                         e->e_id = NULL;
 670
 671 #if USE_DOUBLE_FORK
 672                         /* catch intermediate zombie */
 673                         (void) waitfor(pid);
 674 #endif /* USE_DOUBLE_FORK */
 675                         return;
 676                 }
 677
 678                 /* Reset global flags */
 679                 RestartRequest = NULL;
 680                 RestartWorkGroup = false;
 681                 ShutdownRequest = NULL;
 682                 PendingSignal = 0;
 683
 684                 /*
 685                 **  Initialize exception stack and default exception
 686                 **  handler for child process.
 687                 */
 688
 689                 sm_exc_newthread(fatal_error);
 690
 691                 /*
 692                 **  Since we have accepted responsbility for the message,
 693                 **  change the SIGTERM handler.  intsig() (the old handler)
 694                 **  would remove the envelope if this was a command line
 695                 **  message submission.
 696                 */
 697
 698                 (void) sm_signal(SIGTERM, SIG_DFL);
 699
 700 #if USE_DOUBLE_FORK
 701                 /* double fork to avoid zombies */
 702                 pid = fork();
 703                 if (pid > 0)
 704                         exit(EX_OK);
 705                 save_errno = errno;
 706 #endif /* USE_DOUBLE_FORK */
 707
 708                 CurrentPid = getpid();
 709
 710                 /* be sure we are immune from the terminal */
 711                 disconnect(2, e);
 712                 clearstats();
 713
 714                 /* prevent parent from waiting if there was an error */
 715                 if (pid < 0)
 716                 {
 717                         errno = save_errno;
 718                         syserr("deliver: fork 2");
 719 #if HASFLOCK
 720                         e->e_flags |= EF_INQUEUE;
 721 #else /* HASFLOCK */
 722                         e->e_id = NULL;
 723 #endif /* HASFLOCK */
 724                         finis(true, true, ExitStat);
 725                 }
 726
 727                 /* be sure to give error messages in child */
 728                 QuickAbort = false;
 729
 730                 /*
 731                 **  Close any cached connections.
 732                 **
 733                 **      We don't send the QUIT protocol because the parent
 734                 **      still knows about the connection.
 735                 **
 736                 **      This should only happen when delivering an error
 737                 **      message.
 738                 */
 739
 740                 mci_flush(false, NULL);
 741
 742 #if HASFLOCK
 743                 break;
 744 #else /* HASFLOCK */
 745
 746                 /*
 747                 **  Now reacquire and run the various queue files.
 748                 */
 749
 750                 for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 751                 {
 752                         ENVELOPE *sibling = ee->e_sibling;
 753
 754                         (void) dowork(ee->e_qgrp, ee->e_qdir, ee->e_id,
 755                                       false, false, ee);
 756                         ee->e_sibling = sibling;
 757                 }
 758                 (void) dowork(e->e_qgrp, e->e_qdir, e->e_id,
 759                               false, false, e);
 760                 finis(true, true, ExitStat);
 761 #endif /* HASFLOCK */
 762         }
 763
 764         sendenvelope(e, mode);
 765         (void) dropenvelope(e, true, true);
 766         for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 767         {
 768                 CurEnv = ee;
 769                 if (mode != SM_VERIFY)
 770                         openxscript(ee);
 771                 sendenvelope(ee, mode);
 772                 (void) dropenvelope(ee, true, true);
 773         }
 774         CurEnv = e;
 775
 776         Verbose = oldverbose;
 777         if (mode == SM_FORK)
 778                 finis(true, true, ExitStat);
 779 }
 780
 781 static void
 782 sendenvelope(e, mode)
 783         register ENVELOPE *e;
 784         int mode;
 785 {
 786         register ADDRESS *q;
 787         bool didany;
 788
 789         if (tTd(13, 10))
 790                 sm_dprintf("sendenvelope(%s) e_flags=0x%lx\n",
 791                            e->e_id == NULL ? "[NOQUEUE]" : e->e_id,
 792                            e->e_flags);
 793         if (LogLevel > 80)
 794                 sm_syslog(LOG_DEBUG, e->e_id,
 795                           "sendenvelope, flags=0x%lx",
 796                           e->e_flags);
 797
 798         /*
 799         **  If we have had global, fatal errors, don't bother sending
 800         **  the message at all if we are in SMTP mode.  Local errors
 801         **  (e.g., a single address failing) will still cause the other
 802         **  addresses to be sent.
 803         */
 804
 805         if (bitset(EF_FATALERRS, e->e_flags) &&
 806             (OpMode == MD_SMTP || OpMode == MD_DAEMON))
 807         {
 808                 e->e_flags |= EF_CLRQUEUE;
 809                 return;
 810         }
 811
 812         /*
 813         **  Don't attempt deliveries if we want to bounce now
 814         **  or if deliver-by time is exceeded.
 815         */
 816
 817         if (!bitset(EF_RESPONSE, e->e_flags) &&
 818             (TimeOuts.to_q_return[e->e_timeoutclass] == NOW ||
 819              (IS_DLVR_RETURN(e) && e->e_deliver_by > 0 &&
 820               curtime() > e->e_ctime + e->e_deliver_by)))
 821                 return;
 822
 823         /*
 824         **  Run through the list and send everything.
 825         **
 826         **      Set EF_GLOBALERRS so that error messages during delivery
 827         **      result in returned mail.
 828         */
 829
 830         e->e_nsent = 0;
 831         e->e_flags |= EF_GLOBALERRS;
 832
 833         macdefine(&e->e_macro, A_PERM, macid("{envid}"), e->e_envid);
 834         macdefine(&e->e_macro, A_PERM, macid("{bodytype}"), e->e_bodytype);
 835         didany = false;
 836
 837         if (!bitset(EF_SPLIT, e->e_flags))
 838         {
 839                 ENVELOPE *oldsib;
 840                 ENVELOPE *ee;
 841
 842                 /*
 843                 **  Save old sibling and set it to NULL to avoid
 844                 **  queueing up the same envelopes again.
 845                 **  This requires that envelopes in that list have
 846                 **  been take care of before (or at some other place).
 847                 */
 848
 849                 oldsib = e->e_sibling;
 850                 e->e_sibling = NULL;
 851                 if (!split_by_recipient(e) &&
 852                     bitset(EF_FATALERRS, e->e_flags))
 853                 {
 854                         if (OpMode == MD_SMTP || OpMode == MD_DAEMON)
 855                                 e->e_flags |= EF_CLRQUEUE;
 856                         return;
 857                 }
 858                 for (ee = e->e_sibling; ee != NULL; ee = ee->e_sibling)
 859                         queueup(ee, false, true);
 860
 861                 /* clean up */
 862                 for (ee = e->e_sibling; ee != NULL; ee = ee->e_sibling)
 863                 {
 864                         /* now unlock the job */
 865                         closexscript(ee);
 866                         unlockqueue(ee);
 867
 868                         /* this envelope is marked unused */
 869                         if (ee->e_dfp != NULL)
 870                         {
 871                                 (void) sm_io_close(ee->e_dfp, SM_TIME_DEFAULT);
 872                                 ee->e_dfp = NULL;
 873                         }
 874                         ee->e_id = NULL;
 875                         ee->e_flags &= ~EF_HAS_DF;
 876                 }
 877                 e->e_sibling = oldsib;
 878         }
 879
 880         /* now run through the queue */
 881         for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 882         {
 883 #if XDEBUG
 884                 char wbuf[MAXNAME + 20];
 885
 886                 (void) sm_snprintf(wbuf, sizeof(wbuf), "sendall(%.*s)",
 887                                    MAXNAME, q->q_paddr);
 888                 checkfd012(wbuf);
 889 #endif /* XDEBUG */
 890                 if (mode == SM_VERIFY)
 891                 {
 892                         e->e_to = q->q_paddr;
 893                         if (QS_IS_SENDABLE(q->q_state))
 894                         {
 895                                 if (q->q_host != NULL && q->q_host[0] != '\0')
 896                                         message("deliverable: mailer %s, host %s, user %s",
 897                                                 q->q_mailer->m_name,
 898                                                 q->q_host,
 899                                                 q->q_user);
 900                                 else
 901                                         message("deliverable: mailer %s, user %s",
 902                                                 q->q_mailer->m_name,
 903                                                 q->q_user);
 904                         }
 905                 }
 906                 else if (QS_IS_OK(q->q_state))
 907                 {
 908                         /*
 909                         **  Checkpoint the send list every few addresses
 910                         */
 911
 912                         if (CheckpointInterval > 0 &&
 913                             e->e_nsent >= CheckpointInterval)
 914                         {
 915                                 queueup(e, false, false);
 916                                 e->e_nsent = 0;
 917                         }
 918                         (void) deliver(e, q);
 919                         didany = true;
 920                 }
 921         }
 922         if (didany)
 923         {
 924                 e->e_dtime = curtime();
 925                 e->e_ntries++;
 926         }
 927
 928 #if XDEBUG
 929         checkfd012("end of sendenvelope");
 930 #endif /* XDEBUG */
 931 }
 932
 933 #if REQUIRES_DIR_FSYNC
 934 /*
 935 **  SYNC_DIR -- fsync a directory based on a filename
 936 **
 937 **      Parameters:
 938 **              filename -- path of file
 939 **              panic -- panic?
 940 **
 941 **      Returns:
 942 **              none
 943 */
 944
 945 void
 946 sync_dir(filename, panic)
 947         char *filename;
 948         bool panic;
 949 {
 950         int dirfd;
 951         char *dirp;
 952         char dir[MAXPATHLEN];
 953
 954         if (!RequiresDirfsync)
 955                 return;
 956
 957         /* filesystems which require the directory be synced */
 958         dirp = strrchr(filename, '/');
 959         if (dirp != NULL)
 960         {
 961                 if (sm_strlcpy(dir, filename, sizeof(dir)) >= sizeof(dir))
 962                         return;
 963                 dir[dirp - filename] = '\0';
 964                 dirp = dir;
 965         }
 966         else
 967                 dirp = ".";
 968         dirfd = open(dirp, O_RDONLY, 0700);
 969         if (tTd(40,32))
 970                 sm_syslog(LOG_INFO, NOQID, "sync_dir: %s: fsync(%d)",
 971                           dirp, dirfd);
 972         if (dirfd >= 0)
 973         {
 974                 if (fsync(dirfd) < 0)
 975                 {
 976                         if (panic)
 977                                 syserr("!sync_dir: cannot fsync directory %s",
 978                                        dirp);
 979                         else if (LogLevel > 1)
 980                                 sm_syslog(LOG_ERR, NOQID,
 981                                           "sync_dir: cannot fsync directory %s: %s",
 982                                           dirp, sm_errstring(errno));
 983                 }
 984                 (void) close(dirfd);
 985         }
 986 }
 987 #endif /* REQUIRES_DIR_FSYNC */
 988 /*
 989 **  DUP_QUEUE_FILE -- duplicate a queue file into a split queue
 990 **
 991 **      Parameters:
 992 **              e -- the existing envelope
 993 **              ee -- the new envelope
 994 **              type -- the queue file type (e.g., DATAFL_LETTER)
 995 **
 996 **      Returns:
 997 **              none
 998 */
 999
1000 static void
1001 dup_queue_file(e, ee, type)
1002         ENVELOPE *e, *ee;
1003         int type;
1004 {
1005         char f1buf[MAXPATHLEN], f2buf[MAXPATHLEN];
1006
1007         ee->e_dfp = NULL;
1008         ee->e_xfp = NULL;
1009
1010         /*
1011         **  Make sure both are in the same directory.
1012         */
1013
1014         (void) sm_strlcpy(f1buf, queuename(e, type), sizeof(f1buf));
1015         (void) sm_strlcpy(f2buf, queuename(ee, type), sizeof(f2buf));
1016
1017         /* Force the df to disk if it's not there yet */
1018         if (type == DATAFL_LETTER && e->e_dfp != NULL &&
1019             sm_io_setinfo(e->e_dfp, SM_BF_COMMIT, NULL) < 0 &&
1020             errno != EINVAL)
1021         {
1022                 syserr("!dup_queue_file: can't commit %s", f1buf);
1023                 /* NOTREACHED */
1024         }
1025
1026         if (link(f1buf, f2buf) < 0)
1027         {
1028                 int save_errno = errno;
1029
1030                 syserr("sendall: link(%s, %s)", f1buf, f2buf);
1031                 if (save_errno == EEXIST)
1032                 {
1033                         if (unlink(f2buf) < 0)
1034                         {
1035                                 syserr("!sendall: unlink(%s): permanent",
1036                                        f2buf);
1037                                 /* NOTREACHED */
1038                         }
1039                         if (link(f1buf, f2buf) < 0)
1040                         {
1041                                 syserr("!sendall: link(%s, %s): permanent",
1042                                        f1buf, f2buf);
1043                                 /* NOTREACHED */
1044                         }
1045                 }
1046         }
1047         SYNC_DIR(f2buf, true);
1048 }
1049 /*
1050 **  DOFORK -- do a fork, retrying a couple of times on failure.
1051 **
1052 **      This MUST be a macro, since after a vfork we are running
1053 **      two processes on the same stack!!!
1054 **
1055 **      Parameters:
1056 **              none.
1057 **
1058 **      Returns:
1059 **              From a macro???  You've got to be kidding!
1060 **
1061 **      Side Effects:
1062 **              Modifies the ==> LOCAL <== variable 'pid', leaving:
1063 **                      pid of child in parent, zero in child.
1064 **                      -1 on unrecoverable error.
1065 **
1066 **      Notes:
1067 **              I'm awfully sorry this looks so awful.  That's
1068 **              vfork for you.....
1069 */
1070
1071 #define NFORKTRIES      5
1072
1073 #ifndef FORK
1074 # define FORK   fork
1075 #endif /* ! FORK */
1076
1077 #define DOFORK(fORKfN) \
1078 {\
1079         register int i;\
1080 \
1081         for (i = NFORKTRIES; --i >= 0; )\
1082         {\
1083                 pid = fORKfN();\
1084                 if (pid >= 0)\
1085                         break;\
1086                 if (i > 0)\
1087                         (void) sleep((unsigned) NFORKTRIES - i);\
1088         }\
1089 }
1090 /*
1091 **  DOFORK -- simple fork interface to DOFORK.
1092 **
1093 **      Parameters:
1094 **              none.
1095 **
1096 **      Returns:
1097 **              pid of child in parent.
1098 **              zero in child.
1099 **              -1 on error.
1100 **
1101 **      Side Effects:
1102 **              returns twice, once in parent and once in child.
1103 */
1104
1105 pid_t
1106 dofork()
1107 {
1108         register pid_t pid = -1;
1109
1110         DOFORK(fork);
1111         return pid;
1112 }
1113
1114 /*
1115 **  COLONCMP -- compare host-signatures up to first ':' or EOS
1116 **
1117 **      This takes two strings which happen to be host-signatures and
1118 **      compares them. If the lowest preference portions of the MX-RR's
1119 **      match (up to ':' or EOS, whichever is first), then we have
1120 **      match. This is used for coattail-piggybacking messages during
1121 **      message delivery.
1122 **      If the signatures are the same up to the first ':' the remainder of
1123 **      the signatures are then compared with a normal strcmp(). This saves
1124 **      re-examining the first part of the signatures.
1125 **
1126 **      Parameters:
1127 **              a - first host-signature
1128 **              b - second host-signature
1129 **
1130 **      Returns:
1131 **              HS_MATCH_NO -- no "match".
1132 **              HS_MATCH_FIRST -- "match" for the first MX preference
1133 **                      (up to the first colon (':')).
1134 **              HS_MATCH_FULL -- match for the entire MX record.
1135 **
1136 **      Side Effects:
1137 **              none.
1138 */
1139
1140 #define HS_MATCH_NO     0
1141 #define HS_MATCH_FIRST  1
1142 #define HS_MATCH_FULL   2
1143
1144 static int
1145 coloncmp(a, b)
1146         register const char *a;
1147         register const char *b;
1148 {
1149         int ret = HS_MATCH_NO;
1150         int braclev = 0;
1151
1152         while (*a == *b++)
1153         {
1154                 /* Need to account for IPv6 bracketed addresses */
1155                 if (*a == '[')
1156                         braclev++;
1157                 else if (*a == ']' && braclev > 0)
1158                         braclev--;
1159                 else if (*a == ':' && braclev <= 0)
1160                 {
1161                         ret = HS_MATCH_FIRST;
1162                         a++;
1163                         break;
1164                 }
1165                 else if (*a == '\0')
1166                         return HS_MATCH_FULL; /* a full match */
1167                 a++;
1168         }
1169         if (ret == HS_MATCH_NO &&
1170             braclev <= 0 &&
1171             ((*a == '\0' && *(b - 1) == ':') ||
1172              (*a == ':' && *(b - 1) == '\0')))
1173                 return HS_MATCH_FIRST;
1174         if (ret == HS_MATCH_FIRST && strcmp(a, b) == 0)
1175                 return HS_MATCH_FULL;
1176
1177         return ret;
1178 }
1179
1180 /*
1181 **  SHOULD_TRY_FBSH -- Should try FallbackSmartHost?
1182 **
1183 **      Parameters:
1184 **              e -- envelope
1185 **              tried_fallbacksmarthost -- has been tried already? (in/out)
1186 **              hostbuf -- buffer for hostname (expand FallbackSmartHost) (out)
1187 **              hbsz -- size of hostbuf
1188 **              status -- current delivery status
1189 **
1190 **      Returns:
1191 **              true iff FallbackSmartHost should be tried.
1192 */
1193
1194 static bool should_try_fbsh __P((ENVELOPE *, bool *, char *, size_t, int));
1195
1196 static bool
1197 should_try_fbsh(e, tried_fallbacksmarthost, hostbuf, hbsz, status)
1198         ENVELOPE *e;
1199         bool *tried_fallbacksmarthost;
1200         char *hostbuf;
1201         size_t hbsz;
1202         int status;
1203 {
1204         /*
1205         **  If the host was not found or a temporary failure occurred
1206         **  and a FallbackSmartHost is defined (and we have not yet
1207         **  tried it), then make one last try with it as the host.
1208         */
1209
1210         if ((status == EX_NOHOST || status == EX_TEMPFAIL) &&
1211             FallbackSmartHost != NULL && !*tried_fallbacksmarthost)
1212         {
1213                 *tried_fallbacksmarthost = true;
1214                 expand(FallbackSmartHost, hostbuf, hbsz, e);
1215                 if (!wordinclass(hostbuf, 'w'))
1216                 {
1217                         if (tTd(11, 1))
1218                                 sm_dprintf("one last try with FallbackSmartHost %s\n",
1219                                            hostbuf);
1220                         return true;
1221                 }
1222         }
1223         return false;
1224 }
1225 /*
1226 **  DELIVER -- Deliver a message to a list of addresses.
1227 **
1228 **      This routine delivers to everyone on the same host as the
1229 **      user on the head of the list.  It is clever about mailers
1230 **      that don't handle multiple users.  It is NOT guaranteed
1231 **      that it will deliver to all these addresses however -- so
1232 **      deliver should be called once for each address on the
1233 **      list.
1234 **      Deliver tries to be as opportunistic as possible about piggybacking
1235 **      messages. Some definitions to make understanding easier follow below.
1236 **      Piggybacking occurs when an existing connection to a mail host can
1237 **      be used to send the same message to more than one recipient at the
1238 **      same time. So "no piggybacking" means one message for one recipient
1239 **      per connection. "Intentional piggybacking" happens when the
1240 **      recipients' host address (not the mail host address) is used to
1241 **      attempt piggybacking. Recipients with the same host address
1242 **      have the same mail host. "Coincidental piggybacking" relies on
1243 **      piggybacking based on all the mail host addresses in the MX-RR. This
1244 **      is "coincidental" in the fact it could not be predicted until the
1245 **      MX Resource Records for the hosts were obtained and examined. For
1246 **      example (preference order and equivalence is important, not values):
1247 **              domain1 IN MX 10 mxhost-A
1248 **                      IN MX 20 mxhost-B
1249 **              domain2 IN MX  4 mxhost-A
1250 **                      IN MX  8 mxhost-B
1251 **      Domain1 and domain2 can piggyback the same message to mxhost-A or
1252 **      mxhost-B (if mxhost-A cannot be reached).
1253 **      "Coattail piggybacking" relaxes the strictness of "coincidental
1254 **      piggybacking" in the hope that most significant (lowest value)
1255 **      MX preference host(s) can create more piggybacking. For example
1256 **      (again, preference order and equivalence is important, not values):
1257 **              domain3 IN MX 100 mxhost-C
1258 **                      IN MX 100 mxhost-D
1259 **                      IN MX 200 mxhost-E
1260 **              domain4 IN MX  50 mxhost-C
1261 **                      IN MX  50 mxhost-D
1262 **                      IN MX  80 mxhost-F
1263 **      A message for domain3 and domain4 can piggyback to mxhost-C if mxhost-C
1264 **      is available. Same with mxhost-D because in both RR's the preference
1265 **      value is the same as mxhost-C, respectively.
1266 **      So deliver attempts coattail piggybacking when possible. If the
1267 **      first MX preference level hosts cannot be used then the piggybacking
1268 **      reverts to coincidental piggybacking. Using the above example you
1269 **      cannot deliver to mxhost-F for domain3 regardless of preference value.
1270 **      ("Coattail" from "riding on the coattails of your predecessor" meaning
1271 **      gaining benefit from a predecessor effort with no or little addition
1272 **      effort. The predecessor here being the preceding MX RR).
1273 **
1274 **      Parameters:
1275 **              e -- the envelope to deliver.
1276 **              firstto -- head of the address list to deliver to.
1277 **
1278 **      Returns:
1279 **              zero -- successfully delivered.
1280 **              else -- some failure, see ExitStat for more info.
1281 **
1282 **      Side Effects:
1283 **              The standard input is passed off to someone.
1284 */
1285
1286 static int
1287 deliver(e, firstto)
1288         register ENVELOPE *e;
1289         ADDRESS *firstto;
1290 {
1291         char *host;                     /* host being sent to */
1292         char *user;                     /* user being sent to */
1293         char **pvp;
1294         register char **mvp;
1295         register char *p;
1296         register MAILER *m;             /* mailer for this recipient */
1297         ADDRESS *volatile ctladdr;
1298 #if HASSETUSERCONTEXT
1299         ADDRESS *volatile contextaddr = NULL;
1300 #endif /* HASSETUSERCONTEXT */
1301         register MCI *volatile mci;
1302         register ADDRESS *SM_NONVOLATILE to = firstto;
1303         volatile bool clever = false;   /* running user smtp to this mailer */
1304         ADDRESS *volatile tochain = NULL; /* users chain in this mailer call */
1305         int rcode;                      /* response code */
1306         SM_NONVOLATILE int lmtp_rcode = EX_OK;
1307         SM_NONVOLATILE int nummxhosts = 0; /* number of MX hosts available */
1308         SM_NONVOLATILE int hostnum = 0; /* current MX host index */
1309         char *firstsig;                 /* signature of firstto */
1310         volatile pid_t pid = -1;
1311         char *volatile curhost;
1312         SM_NONVOLATILE unsigned short port = 0;
1313         SM_NONVOLATILE time_t enough = 0;
1314 #if NETUNIX
1315         char *SM_NONVOLATILE mux_path = NULL;   /* path to UNIX domain socket */
1316 #endif /* NETUNIX */
1317         time_t xstart;
1318         bool suidwarn;
1319         bool anyok;                     /* at least one address was OK */
1320         SM_NONVOLATILE bool goodmxfound = false; /* at least one MX was OK */
1321         bool ovr;
1322         bool quarantine;
1323         int strsize;
1324         int rcptcount;
1325         int ret;
1326         static int tobufsize = 0;
1327         static char *tobuf = NULL;
1328         char *rpath;    /* translated return path */
1329         int mpvect[2];
1330         int rpvect[2];
1331         char *mxhosts[MAXMXHOSTS + 1];
1332         char *pv[MAXPV + 1];
1333         char buf[MAXNAME + 1];
1334         char cbuf[MAXPATHLEN];
1335
1336         errno = 0;
1337         SM_REQUIRE(firstto != NULL);    /* same as to */
1338         if (!QS_IS_OK(to->q_state))
1339                 return 0;
1340
1341         suidwarn = geteuid() == 0;
1342
1343         SM_REQUIRE(e != NULL);
1344         m = to->q_mailer;
1345         host = to->q_host;
1346         CurEnv = e;                     /* just in case */
1347         e->e_statmsg = NULL;
1348         SmtpError[0] = '\0';
1349         xstart = curtime();
1350
1351         if (tTd(10, 1))
1352                 sm_dprintf("\n--deliver, id=%s, mailer=%s, host=`%s', first user=`%s'\n",
1353                         e->e_id, m->m_name, host, to->q_user);
1354         if (tTd(10, 100))
1355                 printopenfds(false);
1356
1357         /*
1358         **  Clear {client_*} macros if this is a bounce message to
1359         **  prevent rejection by check_compat ruleset.
1360         */
1361
1362         if (bitset(EF_RESPONSE, e->e_flags))
1363         {
1364                 macdefine(&e->e_macro, A_PERM, macid("{client_name}"), "");
1365                 macdefine(&e->e_macro, A_PERM, macid("{client_ptr}"), "");
1366                 macdefine(&e->e_macro, A_PERM, macid("{client_addr}"), "");
1367                 macdefine(&e->e_macro, A_PERM, macid("{client_port}"), "");
1368                 macdefine(&e->e_macro, A_PERM, macid("{client_resolve}"), "");
1369         }
1370
1371         SM_TRY
1372         {
1373         ADDRESS *skip_back = NULL;
1374
1375         /*
1376         **  Do initial argv setup.
1377         **      Insert the mailer name.  Notice that $x expansion is
1378         **      NOT done on the mailer name.  Then, if the mailer has
1379         **      a picky -f flag, we insert it as appropriate.  This
1380         **      code does not check for 'pv' overflow; this places a
1381         **      manifest lower limit of 4 for MAXPV.
1382         **              The from address rewrite is expected to make
1383         **              the address relative to the other end.
1384         */
1385
1386         /* rewrite from address, using rewriting rules */
1387         rcode = EX_OK;
1388         SM_ASSERT(e->e_from.q_mailer != NULL);
1389         if (bitnset(M_UDBENVELOPE, e->e_from.q_mailer->m_flags))
1390                 p = e->e_sender;
1391         else
1392                 p = e->e_from.q_paddr;
1393         rpath = remotename(p, m, RF_SENDERADDR|RF_CANONICAL, &rcode, e);
1394         if (strlen(rpath) > MAXNAME)
1395         {
1396                 rpath = shortenstring(rpath, MAXSHORTSTR);
1397
1398                 /* avoid bogus errno */
1399                 errno = 0;
1400                 syserr("remotename: huge return path %s", rpath);
1401         }
1402         rpath = sm_rpool_strdup_x(e->e_rpool, rpath);
1403         macdefine(&e->e_macro, A_PERM, 'g', rpath);
1404         macdefine(&e->e_macro, A_PERM, 'h', host);
1405         Errors = 0;
1406         pvp = pv;
1407         *pvp++ = m->m_argv[0];
1408
1409         /* ignore long term host status information if mailer flag W is set */
1410         if (bitnset(M_NOHOSTSTAT, m->m_flags))
1411                 IgnoreHostStatus = true;
1412
1413         /* insert -f or -r flag as appropriate */
1414         if (FromFlag &&
1415             (bitnset(M_FOPT, m->m_flags) ||
1416              bitnset(M_ROPT, m->m_flags)))
1417         {
1418                 if (bitnset(M_FOPT, m->m_flags))
1419                         *pvp++ = "-f";
1420                 else
1421                         *pvp++ = "-r";
1422                 *pvp++ = rpath;
1423         }
1424
1425         /*
1426         **  Append the other fixed parts of the argv.  These run
1427         **  up to the first entry containing "$u".  There can only
1428         **  be one of these, and there are only a few more slots
1429         **  in the pv after it.
1430         */
1431
1432         for (mvp = m->m_argv; (p = *++mvp) != NULL; )
1433         {
1434                 /* can't use strchr here because of sign extension problems */
1435                 while (*p != '\0')
1436                 {
1437                         if ((*p++ & 0377) == MACROEXPAND)
1438                         {
1439                                 if (*p == 'u')
1440                                         break;
1441                         }
1442                 }
1443
1444                 if (*p != '\0')
1445                         break;
1446
1447                 /* this entry is safe -- go ahead and process it */
1448                 expand(*mvp, buf, sizeof(buf), e);
1449                 *pvp++ = sm_rpool_strdup_x(e->e_rpool, buf);
1450                 if (pvp >= &pv[MAXPV - 3])
1451                 {
1452                         syserr("554 5.3.5 Too many parameters to %s before $u",
1453                                pv[0]);
1454                         rcode = -1;
1455                         goto cleanup;
1456                 }
1457         }
1458
1459         /*
1460         **  If we have no substitution for the user name in the argument
1461         **  list, we know that we must supply the names otherwise -- and
1462         **  SMTP is the answer!!
1463         */
1464
1465         if (*mvp == NULL)
1466         {
1467                 /* running LMTP or SMTP */
1468                 clever = true;
1469                 *pvp = NULL;
1470         }
1471         else if (bitnset(M_LMTP, m->m_flags))
1472         {
1473                 /* not running LMTP */
1474                 sm_syslog(LOG_ERR, NULL,
1475                           "Warning: mailer %s: LMTP flag (F=z) turned off",
1476                           m->m_name);
1477                 clrbitn(M_LMTP, m->m_flags);
1478         }
1479
1480         /*
1481         **  At this point *mvp points to the argument with $u.  We
1482         **  run through our address list and append all the addresses
1483         **  we can.  If we run out of space, do not fret!  We can
1484         **  always send another copy later.
1485         */
1486
1487         e->e_to = NULL;
1488         strsize = 2;
1489         rcptcount = 0;
1490         ctladdr = NULL;
1491         if (firstto->q_signature == NULL)
1492                 firstto->q_signature = hostsignature(firstto->q_mailer,
1493                                                      firstto->q_host);
1494         firstsig = firstto->q_signature;
1495
1496         for (; to != NULL; to = to->q_next)
1497         {
1498                 /* avoid sending multiple recipients to dumb mailers */
1499                 if (tochain != NULL && !bitnset(M_MUSER, m->m_flags))
1500                         break;
1501
1502                 /* if already sent or not for this host, don't send */
1503                 if (!QS_IS_OK(to->q_state)) /* already sent; look at next */
1504                         continue;
1505
1506                 /*
1507                 **  Must be same mailer to keep grouping rcpts.
1508                 **  If mailers don't match: continue; sendqueue is not
1509                 **  sorted by mailers, so don't break;
1510                 */
1511
1512                 if (to->q_mailer != firstto->q_mailer)
1513                         continue;
1514
1515                 if (to->q_signature == NULL) /* for safety */
1516                         to->q_signature = hostsignature(to->q_mailer,
1517                                                         to->q_host);
1518
1519                 /*
1520                 **  This is for coincidental and tailcoat piggybacking messages
1521                 **  to the same mail host. While the signatures are identical
1522                 **  (that's the MX-RR's are identical) we can do coincidental
1523                 **  piggybacking. We try hard for coattail piggybacking
1524                 **  with the same mail host when the next recipient has the
1525                 **  same host at lowest preference. It may be that this
1526                 **  won't work out, so 'skip_back' is maintained if a backup
1527                 **  to coincidental piggybacking or full signature must happen.
1528                 */
1529
1530                 ret = firstto == to ? HS_MATCH_FULL :
1531                                       coloncmp(to->q_signature, firstsig);
1532                 if (ret == HS_MATCH_FULL)
1533                         skip_back = to;
1534                 else if (ret == HS_MATCH_NO)
1535                         break;
1536
1537                 if (!clever)
1538                 {
1539                         /* avoid overflowing tobuf */
1540                         strsize += strlen(to->q_paddr) + 1;
1541                         if (strsize > TOBUFSIZE)
1542                                 break;
1543                 }
1544
1545                 if (++rcptcount > to->q_mailer->m_maxrcpt)
1546                         break;
1547
1548                 if (tTd(10, 1))
1549                 {
1550                         sm_dprintf("\nsend to ");
1551                         printaddr(sm_debug_file(), to, false);
1552                 }
1553
1554                 /* compute effective uid/gid when sending */
1555                 if (bitnset(M_RUNASRCPT, to->q_mailer->m_flags))
1556 # if HASSETUSERCONTEXT
1557                         contextaddr = ctladdr = getctladdr(to);
1558 # else /* HASSETUSERCONTEXT */
1559                         ctladdr = getctladdr(to);
1560 # endif /* HASSETUSERCONTEXT */
1561
1562                 if (tTd(10, 2))
1563                 {
1564                         sm_dprintf("ctladdr=");
1565                         printaddr(sm_debug_file(), ctladdr, false);
1566                 }
1567
1568                 user = to->q_user;
1569                 e->e_to = to->q_paddr;
1570
1571                 /*
1572                 **  Check to see that these people are allowed to
1573                 **  talk to each other.
1574                 **  Check also for overflow of e_msgsize.
1575                 */
1576
1577                 if (m->m_maxsize != 0 &&
1578                     (e->e_msgsize > m->m_maxsize || e->e_msgsize < 0))
1579                 {
1580                         e->e_flags |= EF_NO_BODY_RETN;
1581                         if (bitnset(M_LOCALMAILER, to->q_mailer->m_flags))
1582                                 to->q_status = "5.2.3";
1583                         else
1584                                 to->q_status = "5.3.4";
1585
1586                         /* set to->q_rstatus = NULL; or to the following? */
1587                         usrerrenh(to->q_status,
1588                                   "552 Message is too large; %ld bytes max",
1589                                   m->m_maxsize);
1590                         markfailure(e, to, NULL, EX_UNAVAILABLE, false);
1591                         giveresponse(EX_UNAVAILABLE, to->q_status, m,
1592                                      NULL, ctladdr, xstart, e, to);
1593                         continue;
1594                 }
1595                 SM_SET_H_ERRNO(0);
1596                 ovr = true;
1597
1598                 /* do config file checking of compatibility */
1599                 quarantine = (e->e_quarmsg != NULL);
1600                 rcode = rscheck("check_compat", e->e_from.q_paddr, to->q_paddr,
1601                                 e, RSF_RMCOMM|RSF_COUNT, 3, NULL,
1602                                 e->e_id, NULL);
1603                 if (rcode == EX_OK)
1604                 {
1605                         /* do in-code checking if not discarding */
1606                         if (!bitset(EF_DISCARD, e->e_flags))
1607                         {
1608                                 rcode = checkcompat(to, e);
1609                                 ovr = false;
1610                         }
1611                 }
1612                 if (rcode != EX_OK)
1613                 {
1614                         markfailure(e, to, NULL, rcode, ovr);
1615                         giveresponse(rcode, to->q_status, m,
1616                                      NULL, ctladdr, xstart, e, to);
1617                         continue;
1618                 }
1619                 if (!quarantine && e->e_quarmsg != NULL)
1620                 {
1621                         /*
1622                         **  check_compat or checkcompat() has tried
1623                         **  to quarantine but that isn't supported.
1624                         **  Revert the attempt.
1625                         */
1626
1627                         e->e_quarmsg = NULL;
1628                         macdefine(&e->e_macro, A_PERM,
1629                                   macid("{quarantine}"), "");
1630                 }
1631                 if (bitset(EF_DISCARD, e->e_flags))
1632                 {
1633                         if (tTd(10, 5))
1634                         {
1635                                 sm_dprintf("deliver: discarding recipient ");
1636                                 printaddr(sm_debug_file(), to, false);
1637                         }
1638
1639                         /* pretend the message was sent */
1640                         /* XXX should we log something here? */
1641                         to->q_state = QS_DISCARDED;
1642
1643                         /*
1644                         **  Remove discard bit to prevent discard of
1645                         **  future recipients.  This is safe because the
1646                         **  true "global discard" has been handled before
1647                         **  we get here.
1648                         */
1649
1650                         e->e_flags &= ~EF_DISCARD;
1651                         continue;
1652                 }
1653
1654                 /*
1655                 **  Strip quote bits from names if the mailer is dumb
1656                 **      about them.
1657                 */
1658
1659                 if (bitnset(M_STRIPQ, m->m_flags))
1660                 {
1661                         stripquotes(user);
1662                         stripquotes(host);
1663                 }
1664
1665                 /*
1666                 **  Strip all leading backslashes if requested and the
1667                 **  next character is alphanumerical (the latter can
1668                 **  probably relaxed a bit, see RFC2821).
1669                 */
1670
1671                 if (bitnset(M_STRIPBACKSL, m->m_flags) && user[0] == '\\')
1672                         stripbackslash(user);
1673
1674                 /* hack attack -- delivermail compatibility */
1675                 if (m == ProgMailer && *user == '|')
1676                         user++;
1677
1678                 /*
1679                 **  If an error message has already been given, don't
1680                 **      bother to send to this address.
1681                 **
1682                 **      >>>>>>>>>> This clause assumes that the local mailer
1683                 **      >> NOTE >> cannot do any further aliasing; that
1684                 **      >>>>>>>>>> function is subsumed by sendmail.
1685                 */
1686
1687                 if (!QS_IS_OK(to->q_state))
1688                         continue;
1689
1690                 /*
1691                 **  See if this user name is "special".
1692                 **      If the user name has a slash in it, assume that this
1693                 **      is a file -- send it off without further ado.  Note
1694                 **      that this type of addresses is not processed along
1695                 **      with the others, so we fudge on the To person.
1696                 */
1697
1698                 if (strcmp(m->m_mailer, "[FILE]") == 0)
1699                 {
1700                         macdefine(&e->e_macro, A_PERM, 'u', user);
1701                         p = to->q_home;
1702                         if (p == NULL && ctladdr != NULL)
1703                                 p = ctladdr->q_home;
1704                         macdefine(&e->e_macro, A_PERM, 'z', p);
1705                         expand(m->m_argv[1], buf, sizeof(buf), e);
1706                         if (strlen(buf) > 0)
1707                                 rcode = mailfile(buf, m, ctladdr, SFF_CREAT, e);
1708                         else
1709                         {
1710                                 syserr("empty filename specification for mailer %s",
1711                                        m->m_name);
1712                                 rcode = EX_CONFIG;
1713                         }
1714                         giveresponse(rcode, to->q_status, m, NULL,
1715                                      ctladdr, xstart, e, to);
1716                         markfailure(e, to, NULL, rcode, true);
1717                         e->e_nsent++;
1718                         if (rcode == EX_OK)
1719                         {
1720                                 to->q_state = QS_SENT;
1721                                 if (bitnset(M_LOCALMAILER, m->m_flags) &&
1722                                     bitset(QPINGONSUCCESS, to->q_flags))
1723                                 {
1724                                         to->q_flags |= QDELIVERED;
1725                                         to->q_status = "2.1.5";
1726                                         (void) sm_io_fprintf(e->e_xfp,
1727                                                              SM_TIME_DEFAULT,
1728                                                              "%s... Successfully delivered\n",
1729                                                              to->q_paddr);
1730                                 }
1731                         }
1732                         to->q_statdate = curtime();
1733                         markstats(e, to, STATS_NORMAL);
1734                         continue;
1735                 }
1736
1737                 /*
1738                 **  Address is verified -- add this user to mailer
1739                 **  argv, and add it to the print list of recipients.
1740                 */
1741
1742                 /* link together the chain of recipients */
1743                 to->q_tchain = tochain;
1744                 tochain = to;
1745                 e->e_to = "[CHAIN]";
1746
1747                 macdefine(&e->e_macro, A_PERM, 'u', user);  /* to user */
1748                 p = to->q_home;
1749                 if (p == NULL && ctladdr != NULL)
1750                         p = ctladdr->q_home;
1751                 macdefine(&e->e_macro, A_PERM, 'z', p);  /* user's home */
1752
1753                 /* set the ${dsn_notify} macro if applicable */
1754                 if (bitset(QHASNOTIFY, to->q_flags))
1755                 {
1756                         char notify[MAXLINE];
1757
1758                         notify[0] = '\0';
1759                         if (bitset(QPINGONSUCCESS, to->q_flags))
1760                                 (void) sm_strlcat(notify, "SUCCESS,",
1761                                                   sizeof(notify));
1762                         if (bitset(QPINGONFAILURE, to->q_flags))
1763                                 (void) sm_strlcat(notify, "FAILURE,",
1764                                                   sizeof(notify));
1765                         if (bitset(QPINGONDELAY, to->q_flags))
1766                                 (void) sm_strlcat(notify, "DELAY,",
1767                                                   sizeof(notify));
1768
1769                         /* Set to NEVER or drop trailing comma */
1770                         if (notify[0] == '\0')
1771                                 (void) sm_strlcat(notify, "NEVER",
1772                                                   sizeof(notify));
1773                         else
1774                                 notify[strlen(notify) - 1] = '\0';
1775
1776                         macdefine(&e->e_macro, A_TEMP,
1777                                 macid("{dsn_notify}"), notify);
1778                 }
1779                 else
1780                         macdefine(&e->e_macro, A_PERM,
1781                                 macid("{dsn_notify}"), NULL);
1782
1783                 /*
1784                 **  Expand out this user into argument list.
1785                 */
1786
1787                 if (!clever)
1788                 {
1789                         expand(*mvp, buf, sizeof(buf), e);
1790                         *pvp++ = sm_rpool_strdup_x(e->e_rpool, buf);
1791                         if (pvp >= &pv[MAXPV - 2])
1792                         {
1793                                 /* allow some space for trailing parms */
1794                                 break;
1795                         }
1796                 }
1797         }
1798
1799         /* see if any addresses still exist */
1800         if (tochain == NULL)
1801         {
1802                 rcode = 0;
1803                 goto cleanup;
1804         }
1805
1806         /* print out messages as full list */
1807         strsize = 1;
1808         for (to = tochain; to != NULL; to = to->q_tchain)
1809                 strsize += strlen(to->q_paddr) + 1;
1810         if (strsize < TOBUFSIZE)
1811                 strsize = TOBUFSIZE;
1812         if (strsize > tobufsize)
1813         {
1814                 SM_FREE_CLR(tobuf);
1815                 tobuf = sm_pmalloc_x(strsize);
1816                 tobufsize = strsize;
1817         }
1818         p = tobuf;
1819         *p = '\0';
1820         for (to = tochain; to != NULL; to = to->q_tchain)
1821         {
1822                 (void) sm_strlcpyn(p, tobufsize - (p - tobuf), 2,
1823                                    ",", to->q_paddr);
1824                 p += strlen(p);
1825         }
1826         e->e_to = tobuf + 1;
1827
1828         /*
1829         **  Fill out any parameters after the $u parameter.
1830         */
1831
1832         if (!clever)
1833         {
1834                 while (*++mvp != NULL)
1835                 {
1836                         expand(*mvp, buf, sizeof(buf), e);
1837                         *pvp++ = sm_rpool_strdup_x(e->e_rpool, buf);
1838                         if (pvp >= &pv[MAXPV])
1839                                 syserr("554 5.3.0 deliver: pv overflow after $u for %s",
1840                                        pv[0]);
1841                 }
1842         }
1843         *pvp++ = NULL;
1844
1845         /*
1846         **  Call the mailer.
1847         **      The argument vector gets built, pipes
1848         **      are created as necessary, and we fork & exec as
1849         **      appropriate.
1850         **      If we are running SMTP, we just need to clean up.
1851         */
1852
1853         /* XXX this seems a bit wierd */
1854         if (ctladdr == NULL && m != ProgMailer && m != FileMailer &&
1855             bitset(QGOODUID, e->e_from.q_flags))
1856                 ctladdr = &e->e_from;
1857
1858 #if NAMED_BIND
1859         if (ConfigLevel < 2)
1860                 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH);   /* XXX */
1861 #endif /* NAMED_BIND */
1862
1863         if (tTd(11, 1))
1864         {
1865                 sm_dprintf("openmailer:");
1866                 printav(sm_debug_file(), pv);
1867         }
1868         errno = 0;
1869         SM_SET_H_ERRNO(0);
1870         CurHostName = NULL;
1871
1872         /*
1873         **  Deal with the special case of mail handled through an IPC
1874         **  connection.
1875         **      In this case we don't actually fork.  We must be
1876         **      running SMTP for this to work.  We will return a
1877         **      zero pid to indicate that we are running IPC.
1878         **  We also handle a debug version that just talks to stdin/out.
1879         */
1880
1881         curhost = NULL;
1882         SmtpPhase = NULL;
1883         mci = NULL;
1884
1885 #if XDEBUG
1886         {
1887                 char wbuf[MAXLINE];
1888
1889                 /* make absolutely certain 0, 1, and 2 are in use */
1890                 (void) sm_snprintf(wbuf, sizeof(wbuf), "%s... openmailer(%s)",
1891                                    shortenstring(e->e_to, MAXSHORTSTR),
1892                                    m->m_name);
1893                 checkfd012(wbuf);
1894         }
1895 #endif /* XDEBUG */
1896
1897         /* check for 8-bit available */
1898         if (bitset(EF_HAS8BIT, e->e_flags) &&
1899             bitnset(M_7BITS, m->m_flags) &&
1900             (bitset(EF_DONT_MIME, e->e_flags) ||
1901              !(bitset(MM_MIME8BIT, MimeMode) ||
1902                (bitset(EF_IS_MIME, e->e_flags) &&
1903                 bitset(MM_CVTMIME, MimeMode)))))
1904         {
1905                 e->e_status = "5.6.3";
1906                 usrerrenh(e->e_status,
1907                           "554 Cannot send 8-bit data to 7-bit destination");
1908                 rcode = EX_DATAERR;
1909                 goto give_up;
1910         }
1911
1912         if (tTd(62, 8))
1913                 checkfds("before delivery");
1914
1915         /* check for Local Person Communication -- not for mortals!!! */
1916         if (strcmp(m->m_mailer, "[LPC]") == 0)
1917         {
1918                 if (clever)
1919                 {
1920                         /* flush any expired connections */
1921                         (void) mci_scan(NULL);
1922
1923                         /* try to get a cached connection or just a slot */
1924                         mci = mci_get(m->m_name, m);
1925                         if (mci->mci_host == NULL)
1926                                 mci->mci_host = m->m_name;
1927                         CurHostName = mci->mci_host;
1928                         if (mci->mci_state != MCIS_CLOSED)
1929                         {
1930                                 message("Using cached SMTP/LPC connection for %s...",
1931                                         m->m_name);
1932                                 mci->mci_deliveries++;
1933                                 goto do_transfer;
1934                         }
1935                 }
1936                 else
1937                 {
1938                         mci = mci_new(e->e_rpool);
1939                 }
1940                 mci->mci_in = smioin;
1941                 mci->mci_out = smioout;
1942                 mci->mci_mailer = m;
1943                 mci->mci_host = m->m_name;
1944                 if (clever)
1945                 {
1946                         mci->mci_state = MCIS_OPENING;
1947                         mci_cache(mci);
1948                 }
1949                 else
1950                         mci->mci_state = MCIS_OPEN;
1951         }
1952         else if (strcmp(m->m_mailer, "[IPC]") == 0)
1953         {
1954                 register int i;
1955
1956                 if (pv[0] == NULL || pv[1] == NULL || pv[1][0] == '\0')
1957                 {
1958                         syserr("null destination for %s mailer", m->m_mailer);
1959                         rcode = EX_CONFIG;
1960                         goto give_up;
1961                 }
1962
1963 # if NETUNIX
1964                 if (strcmp(pv[0], "FILE") == 0)
1965                 {
1966                         curhost = CurHostName = "localhost";
1967                         mux_path = pv[1];
1968                 }
1969                 else
1970 # endif /* NETUNIX */
1971                 {
1972                         CurHostName = pv[1];
1973                         curhost = hostsignature(m, pv[1]);
1974                 }
1975
1976                 if (curhost == NULL || curhost[0] == '\0')
1977                 {
1978                         syserr("null host signature for %s", pv[1]);
1979                         rcode = EX_CONFIG;
1980                         goto give_up;
1981                 }
1982
1983                 if (!clever)
1984                 {
1985                         syserr("554 5.3.5 non-clever IPC");
1986                         rcode = EX_CONFIG;
1987                         goto give_up;
1988                 }
1989                 if (pv[2] != NULL
1990 # if NETUNIX
1991                     && mux_path == NULL
1992 # endif /* NETUNIX */
1993                     )
1994                 {
1995                         port = htons((unsigned short) atoi(pv[2]));
1996                         if (port == 0)
1997                         {
1998 # ifdef NO_GETSERVBYNAME
1999                                 syserr("Invalid port number: %s", pv[2]);
2000 # else /* NO_GETSERVBYNAME */
2001                                 struct servent *sp = getservbyname(pv[2], "tcp");
2002
2003                                 if (sp == NULL)
2004                                         syserr("Service %s unknown", pv[2]);
2005                                 else
2006                                         port = sp->s_port;
2007 # endif /* NO_GETSERVBYNAME */
2008                         }
2009                 }
2010
2011                 nummxhosts = parse_hostsignature(curhost, mxhosts, m);
2012                 if (TimeOuts.to_aconnect > 0)
2013                         enough = curtime() + TimeOuts.to_aconnect;
2014 tryhost:
2015                 while (hostnum < nummxhosts)
2016                 {
2017                         char sep = ':';
2018                         char *endp;
2019                         static char hostbuf[MAXNAME + 1];
2020                         bool tried_fallbacksmarthost = false;
2021
2022 # if NETINET6
2023                         if (*mxhosts[hostnum] == '[')
2024                         {
2025                                 endp = strchr(mxhosts[hostnum] + 1, ']');
2026                                 if (endp != NULL)
2027                                         endp = strpbrk(endp + 1, ":,");
2028                         }
2029                         else
2030                                 endp = strpbrk(mxhosts[hostnum], ":,");
2031 # else /* NETINET6 */
2032                         endp = strpbrk(mxhosts[hostnum], ":,");
2033 # endif /* NETINET6 */
2034                         if (endp != NULL)
2035                         {
2036                                 sep = *endp;
2037                                 *endp = '\0';
2038                         }
2039
2040                         if (hostnum == 1 && skip_back != NULL)
2041                         {
2042                                 /*
2043                                 **  Coattail piggybacking is no longer an
2044                                 **  option with the mail host next to be tried
2045                                 **  no longer the lowest MX preference
2046                                 **  (hostnum == 1 meaning we're on the second
2047                                 **  preference). We do not try to coattail
2048                                 **  piggyback more than the first MX preference.
2049                                 **  Revert 'tochain' to last location for
2050                                 **  coincidental piggybacking. This works this
2051                                 **  easily because the q_tchain kept getting
2052                                 **  added to the top of the linked list.
2053                                 */
2054
2055                                 tochain = skip_back;
2056                         }
2057
2058                         if (*mxhosts[hostnum] == '\0')
2059                         {
2060                                 syserr("deliver: null host name in signature");
2061                                 hostnum++;
2062                                 if (endp != NULL)
2063                                         *endp = sep;
2064                                 continue;
2065                         }
2066                         (void) sm_strlcpy(hostbuf, mxhosts[hostnum],
2067                                           sizeof(hostbuf));
2068                         hostnum++;
2069                         if (endp != NULL)
2070                                 *endp = sep;
2071
2072   one_last_try:
2073                         /* see if we already know that this host is fried */
2074                         CurHostName = hostbuf;
2075                         mci = mci_get(hostbuf, m);
2076                         if (mci->mci_state != MCIS_CLOSED)
2077                         {
2078                                 char *type;
2079
2080                                 if (tTd(11, 1))
2081                                 {
2082                                         sm_dprintf("openmailer: ");
2083                                         mci_dump(sm_debug_file(), mci, false);
2084                                 }
2085                                 CurHostName = mci->mci_host;
2086                                 if (bitnset(M_LMTP, m->m_flags))
2087                                         type = "L";
2088                                 else if (bitset(MCIF_ESMTP, mci->mci_flags))
2089                                         type = "ES";
2090                                 else
2091                                         type = "S";
2092                                 message("Using cached %sMTP connection to %s via %s...",
2093                                         type, hostbuf, m->m_name);
2094                                 mci->mci_deliveries++;
2095                                 break;
2096                         }
2097                         mci->mci_mailer = m;
2098                         if (mci->mci_exitstat != EX_OK)
2099                         {
2100                                 if (mci->mci_exitstat == EX_TEMPFAIL)
2101                                         goodmxfound = true;
2102
2103                                 /* Try FallbackSmartHost? */
2104                                 if (should_try_fbsh(e, &tried_fallbacksmarthost,
2105                                                     hostbuf, sizeof(hostbuf),
2106                                                     mci->mci_exitstat))
2107                                         goto one_last_try;
2108
2109                                 continue;
2110                         }
2111
2112                         if (mci_lock_host(mci) != EX_OK)
2113                         {
2114                                 mci_setstat(mci, EX_TEMPFAIL, "4.4.5", NULL);
2115                                 goodmxfound = true;
2116                                 continue;
2117                         }
2118
2119                         /* try the connection */
2120                         sm_setproctitle(true, e, "%s %s: %s",
2121                                         qid_printname(e),
2122                                         hostbuf, "user open");
2123 # if NETUNIX
2124                         if (mux_path != NULL)
2125                         {
2126                                 message("Connecting to %s via %s...",
2127                                         mux_path, m->m_name);
2128                                 i = makeconnection_ds((char *) mux_path, mci);
2129                         }
2130                         else
2131 # endif /* NETUNIX */
2132                         {
2133                                 if (port == 0)
2134                                         message("Connecting to %s via %s...",
2135                                                 hostbuf, m->m_name);
2136                                 else
2137                                         message("Connecting to %s port %d via %s...",
2138                                                 hostbuf, ntohs(port),
2139                                                 m->m_name);
2140                                 i = makeconnection(hostbuf, port, mci, e,
2141                                                    enough);
2142                         }
2143                         mci->mci_errno = errno;
2144                         mci->mci_lastuse = curtime();
2145                         mci->mci_deliveries = 0;
2146                         mci->mci_exitstat = i;
2147 # if NAMED_BIND
2148                         mci->mci_herrno = h_errno;
2149 # endif /* NAMED_BIND */
2150
2151                         /*
2152                         **  Have we tried long enough to get a connection?
2153                         **      If yes, skip to the fallback MX hosts
2154                         **      (if existent).
2155                         */
2156
2157                         if (enough > 0 && mci->mci_lastuse >= enough)
2158                         {
2159                                 int h;
2160 # if NAMED_BIND
2161                                 extern int NumFallbackMXHosts;
2162 # else /* NAMED_BIND */
2163                                 const int NumFallbackMXHosts = 0;
2164 # endif /* NAMED_BIND */
2165
2166                                 if (hostnum < nummxhosts && LogLevel > 9)
2167                                         sm_syslog(LOG_INFO, e->e_id,
2168                                                   "Timeout.to_aconnect occurred before exhausting all addresses");
2169
2170                                 /* turn off timeout if fallback available */
2171                                 if (NumFallbackMXHosts > 0)
2172                                         enough = 0;
2173
2174                                 /* skip to a fallback MX host */
2175                                 h = nummxhosts - NumFallbackMXHosts;
2176                                 if (hostnum < h)
2177                                         hostnum = h;
2178                         }
2179                         if (i == EX_OK)
2180                         {
2181                                 goodmxfound = true;
2182                                 markstats(e, firstto, STATS_CONNECT);
2183                                 mci->mci_state = MCIS_OPENING;
2184                                 mci_cache(mci);
2185                                 if (TrafficLogFile != NULL)
2186                                         (void) sm_io_fprintf(TrafficLogFile,
2187                                                              SM_TIME_DEFAULT,
2188                                                              "%05d === CONNECT %s\n",
2189                                                              (int) CurrentPid,
2190                                                              hostbuf);
2191                                 break;
2192                         }
2193                         else
2194                         {
2195                                 /* Try FallbackSmartHost? */
2196                                 if (should_try_fbsh(e, &tried_fallbacksmarthost,
2197                                                     hostbuf, sizeof(hostbuf), i))
2198                                         goto one_last_try;
2199
2200                                 if (tTd(11, 1))
2201                                         sm_dprintf("openmailer: makeconnection => stat=%d, errno=%d\n",
2202                                                    i, errno);
2203                                 if (i == EX_TEMPFAIL)
2204                                         goodmxfound = true;
2205                                 mci_unlock_host(mci);
2206                         }
2207
2208                         /* enter status of this host */
2209                         setstat(i);
2210
2211                         /* should print some message here for -v mode */
2212                 }
2213                 if (mci == NULL)
2214                 {
2215                         syserr("deliver: no host name");
2216                         rcode = EX_SOFTWARE;
2217                         goto give_up;
2218                 }
2219                 mci->mci_pid = 0;
2220         }
2221         else
2222         {
2223                 /* flush any expired connections */
2224                 (void) mci_scan(NULL);
2225                 mci = NULL;
2226
2227                 if (bitnset(M_LMTP, m->m_flags))
2228                 {
2229                         /* try to get a cached connection */
2230                         mci = mci_get(m->m_name, m);
2231                         if (mci->mci_host == NULL)
2232                                 mci->mci_host = m->m_name;
2233                         CurHostName = mci->mci_host;
2234                         if (mci->mci_state != MCIS_CLOSED)
2235                         {
2236                                 message("Using cached LMTP connection for %s...",
2237                                         m->m_name);
2238                                 mci->mci_deliveries++;
2239                                 goto do_transfer;
2240                         }
2241                 }
2242
2243                 /* announce the connection to verbose listeners */
2244                 if (host == NULL || host[0] == '\0')
2245                         message("Connecting to %s...", m->m_name);
2246                 else
2247                         message("Connecting to %s via %s...", host, m->m_name);
2248                 if (TrafficLogFile != NULL)
2249                 {
2250                         char **av;
2251
2252                         (void) sm_io_fprintf(TrafficLogFile, SM_TIME_DEFAULT,
2253                                              "%05d === EXEC", (int) CurrentPid);
2254                         for (av = pv; *av != NULL; av++)
2255                                 (void) sm_io_fprintf(TrafficLogFile,
2256                                                      SM_TIME_DEFAULT, " %s",
2257                                                      *av);
2258                         (void) sm_io_fprintf(TrafficLogFile, SM_TIME_DEFAULT,
2259                                              "\n");
2260                 }
2261
2262 #if XDEBUG
2263                 checkfd012("before creating mail pipe");
2264 #endif /* XDEBUG */
2265
2266                 /* create a pipe to shove the mail through */
2267                 if (pipe(mpvect) < 0)
2268                 {
2269                         syserr("%s... openmailer(%s): pipe (to mailer)",
2270                                shortenstring(e->e_to, MAXSHORTSTR), m->m_name);
2271                         if (tTd(11, 1))
2272                                 sm_dprintf("openmailer: NULL\n");
2273                         rcode = EX_OSERR;
2274                         goto give_up;
2275                 }
2276
2277 #if XDEBUG
2278                 /* make sure we didn't get one of the standard I/O files */
2279                 if (mpvect[0] < 3 || mpvect[1] < 3)
2280                 {
2281                         syserr("%s... openmailer(%s): bogus mpvect %d %d",
2282                                shortenstring(e->e_to, MAXSHORTSTR), m->m_name,
2283                                mpvect[0], mpvect[1]);
2284                         printopenfds(true);
2285                         if (tTd(11, 1))
2286                                 sm_dprintf("openmailer: NULL\n");
2287                         rcode = EX_OSERR;
2288                         goto give_up;
2289                 }
2290
2291                 /* make sure system call isn't dead meat */
2292                 checkfdopen(mpvect[0], "mpvect[0]");
2293                 checkfdopen(mpvect[1], "mpvect[1]");
2294                 if (mpvect[0] == mpvect[1] ||
2295                     (e->e_lockfp != NULL &&
2296                      (mpvect[0] == sm_io_getinfo(e->e_lockfp, SM_IO_WHAT_FD,
2297                                                  NULL) ||
2298                       mpvect[1] == sm_io_getinfo(e->e_lockfp, SM_IO_WHAT_FD,
2299                                                  NULL))))
2300                 {
2301                         if (e->e_lockfp == NULL)
2302                                 syserr("%s... openmailer(%s): overlapping mpvect %d %d",
2303                                        shortenstring(e->e_to, MAXSHORTSTR),
2304                                        m->m_name, mpvect[0], mpvect[1]);
2305                         else
2306                                 syserr("%s... openmailer(%s): overlapping mpvect %d %d, lockfp = %d",
2307                                        shortenstring(e->e_to, MAXSHORTSTR),
2308                                        m->m_name, mpvect[0], mpvect[1],
2309                                        sm_io_getinfo(e->e_lockfp,
2310                                                      SM_IO_WHAT_FD, NULL));
2311                 }
2312 #endif /* XDEBUG */
2313
2314                 /* create a return pipe */
2315                 if (pipe(rpvect) < 0)
2316                 {
2317                         syserr("%s... openmailer(%s): pipe (from mailer)",
2318                                shortenstring(e->e_to, MAXSHORTSTR),
2319                                m->m_name);
2320                         (void) close(mpvect[0]);
2321                         (void) close(mpvect[1]);
2322                         if (tTd(11, 1))
2323                                 sm_dprintf("openmailer: NULL\n");
2324                         rcode = EX_OSERR;
2325                         goto give_up;
2326                 }
2327 #if XDEBUG
2328                 checkfdopen(rpvect[0], "rpvect[0]");
2329                 checkfdopen(rpvect[1], "rpvect[1]");
2330 #endif /* XDEBUG */
2331
2332                 /*
2333                 **  Actually fork the mailer process.
2334                 **      DOFORK is clever about retrying.
2335                 **
2336                 **      Dispose of SIGCHLD signal catchers that may be laying
2337                 **      around so that endmailer will get it.
2338                 */
2339
2340                 if (e->e_xfp != NULL)   /* for debugging */
2341                         (void) sm_io_flush(e->e_xfp, SM_TIME_DEFAULT);
2342                 (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
2343                 (void) sm_signal(SIGCHLD, SIG_DFL);
2344
2345
2346                 DOFORK(FORK);
2347                 /* pid is set by DOFORK */
2348
2349                 if (pid < 0)
2350                 {
2351                         /* failure */
2352                         syserr("%s... openmailer(%s): cannot fork",
2353                                shortenstring(e->e_to, MAXSHORTSTR), m->m_name);
2354                         (void) close(mpvect[0]);
2355                         (void) close(mpvect[1]);
2356                         (void) close(rpvect[0]);
2357                         (void) close(rpvect[1]);
2358                         if (tTd(11, 1))
2359                                 sm_dprintf("openmailer: NULL\n");
2360                         rcode = EX_OSERR;
2361                         goto give_up;
2362                 }
2363                 else if (pid == 0)
2364                 {
2365                         int save_errno;
2366                         int sff;
2367                         int new_euid = NO_UID;
2368                         int new_ruid = NO_UID;
2369                         int new_gid = NO_GID;
2370                         char *user = NULL;
2371                         struct stat stb;
2372                         extern int DtableSize;
2373
2374                         CurrentPid = getpid();
2375
2376                         /* clear the events to turn off SIGALRMs */
2377                         sm_clear_events();
2378
2379                         /* Reset global flags */
2380                         RestartRequest = NULL;
2381                         RestartWorkGroup = false;
2382                         ShutdownRequest = NULL;
2383                         PendingSignal = 0;
2384
2385                         if (e->e_lockfp != NULL)
2386                                 (void) close(sm_io_getinfo(e->e_lockfp,
2387                                                            SM_IO_WHAT_FD,
2388                                                            NULL));
2389
2390                         /* child -- set up input & exec mailer */
2391                         (void) sm_signal(SIGALRM, sm_signal_noop);
2392                         (void) sm_signal(SIGCHLD, SIG_DFL);
2393                         (void) sm_signal(SIGHUP, SIG_IGN);
2394                         (void) sm_signal(SIGINT, SIG_IGN);
2395                         (void) sm_signal(SIGTERM, SIG_DFL);
2396 # ifdef SIGUSR1
2397                         (void) sm_signal(SIGUSR1, sm_signal_noop);
2398 # endif /* SIGUSR1 */
2399
2400                         if (m != FileMailer || stat(tochain->q_user, &stb) < 0)
2401                                 stb.st_mode = 0;
2402
2403 # if HASSETUSERCONTEXT
2404                         /*
2405                         **  Set user resources.
2406                         */
2407
2408                         if (contextaddr != NULL)
2409                         {
2410                                 int sucflags;
2411                                 struct passwd *pwd;
2412
2413                                 if (contextaddr->q_ruser != NULL)
2414                                         pwd = sm_getpwnam(contextaddr->q_ruser);
2415                                 else
2416                                         pwd = sm_getpwnam(contextaddr->q_user);
2417                                 sucflags = LOGIN_SETRESOURCES|LOGIN_SETPRIORITY;
2418 #ifdef LOGIN_SETMAC
2419                                 sucflags |= LOGIN_SETMAC;
2420 #endif /* LOGIN_SETMAC */
2421                                 if (pwd != NULL &&
2422                                     setusercontext(NULL, pwd, pwd->pw_uid,
2423                                                    sucflags) == -1 &&
2424                                     suidwarn)
2425                                 {
2426                                         syserr("openmailer: setusercontext() failed");
2427                                         exit(EX_TEMPFAIL);
2428                                 }
2429                         }
2430 # endif /* HASSETUSERCONTEXT */
2431
2432 #if HASNICE
2433                         /* tweak niceness */
2434                         if (m->m_nice != 0)
2435                                 (void) nice(m->m_nice);
2436 #endif /* HASNICE */
2437
2438                         /* reset group id */
2439                         if (bitnset(M_SPECIFIC_UID, m->m_flags))
2440                         {
2441                                 if (m->m_gid == NO_GID)
2442                                         new_gid = RunAsGid;
2443                                 else
2444                                         new_gid = m->m_gid;
2445                         }
2446                         else if (bitset(S_ISGID, stb.st_mode))
2447                                 new_gid = stb.st_gid;
2448                         else if (ctladdr != NULL && ctladdr->q_gid != 0)
2449                         {
2450                                 if (!DontInitGroups)
2451                                 {
2452                                         user = ctladdr->q_ruser;
2453                                         if (user == NULL)
2454                                                 user = ctladdr->q_user;
2455
2456                                         if (initgroups(user,
2457                                                        ctladdr->q_gid) == -1
2458                                             && suidwarn)
2459                                         {
2460                                                 syserr("openmailer: initgroups(%s, %d) failed",
2461                                                         user, ctladdr->q_gid);
2462                                                 exit(EX_TEMPFAIL);
2463                                         }
2464                                 }
2465                                 else
2466                                 {
2467                                         GIDSET_T gidset[1];
2468
2469                                         gidset[0] = ctladdr->q_gid;
2470                                         if (setgroups(1, gidset) == -1
2471                                             && suidwarn)
2472                                         {
2473                                                 syserr("openmailer: setgroups() failed");
2474                                                 exit(EX_TEMPFAIL);
2475                                         }
2476                                 }
2477                                 new_gid = ctladdr->q_gid;
2478                         }
2479                         else
2480                         {
2481                                 if (!DontInitGroups)
2482                                 {
2483                                         user = DefUser;
2484                                         if (initgroups(DefUser, DefGid) == -1 &&
2485                                             suidwarn)
2486                                         {
2487                                                 syserr("openmailer: initgroups(%s, %d) failed",
2488                                                        DefUser, DefGid);
2489                                                 exit(EX_TEMPFAIL);
2490                                         }
2491                                 }
2492                                 else
2493                                 {
2494                                         GIDSET_T gidset[1];
2495
2496                                         gidset[0] = DefGid;
2497                                         if (setgroups(1, gidset) == -1
2498                                             && suidwarn)
2499                                         {
2500                                                 syserr("openmailer: setgroups() failed");
2501                                                 exit(EX_TEMPFAIL);
2502                                         }
2503                                 }
2504                                 if (m->m_gid == NO_GID)
2505                                         new_gid = DefGid;
2506                                 else
2507                                         new_gid = m->m_gid;
2508                         }
2509                         if (new_gid != NO_GID)
2510                         {
2511                                 if (RunAsUid != 0 &&
2512                                     bitnset(M_SPECIFIC_UID, m->m_flags) &&
2513                                     new_gid != getgid() &&
2514                                     new_gid != getegid())
2515                                 {
2516                                         /* Only root can change the gid */
2517                                         syserr("openmailer: insufficient privileges to change gid, RunAsUid=%d, new_gid=%d, gid=%d, egid=%d",
2518                                                (int) RunAsUid, (int) new_gid,
2519                                                (int) getgid(), (int) getegid());
2520                                         exit(EX_TEMPFAIL);
2521                                 }
2522
2523                                 if (setgid(new_gid) < 0 && suidwarn)
2524                                 {
2525                                         syserr("openmailer: setgid(%ld) failed",
2526                                                (long) new_gid);
2527                                         exit(EX_TEMPFAIL);
2528                                 }
2529                         }
2530
2531                         /* change root to some "safe" directory */
2532                         if (m->m_rootdir != NULL)
2533                         {
2534                                 expand(m->m_rootdir, cbuf, sizeof(cbuf), e);
2535                                 if (tTd(11, 20))
2536                                         sm_dprintf("openmailer: chroot %s\n",
2537                                                    cbuf);
2538                                 if (chroot(cbuf) < 0)
2539                                 {
2540                                         syserr("openmailer: Cannot chroot(%s)",
2541                                                cbuf);
2542                                         exit(EX_TEMPFAIL);
2543                                 }
2544                                 if (chdir("/") < 0)
2545                                 {
2546                                         syserr("openmailer: cannot chdir(/)");
2547                                         exit(EX_TEMPFAIL);
2548                                 }
2549                         }
2550
2551                         /* reset user id */
2552                         endpwent();
2553                         sm_mbdb_terminate();
2554                         if (bitnset(M_SPECIFIC_UID, m->m_flags))
2555                         {
2556                                 if (m->m_uid == NO_UID)
2557                                         new_euid = RunAsUid;
2558                                 else
2559                                         new_euid = m->m_uid;
2560
2561                                 /*
2562                                 **  Undo the effects of the uid change in main
2563                                 **  for signal handling.  The real uid may
2564                                 **  be used by mailer in adding a "From "
2565                                 **  line.
2566                                 */
2567
2568                                 if (RealUid != 0 && RealUid != getuid())
2569                                 {
2570 # if MAILER_SETUID_METHOD == USE_SETEUID
2571 #  if HASSETREUID
2572                                         if (setreuid(RealUid, geteuid()) < 0)
2573                                         {
2574                                                 syserr("openmailer: setreuid(%d, %d) failed",
2575                                                        (int) RealUid, (int) geteuid());
2576                                                 exit(EX_OSERR);
2577                                         }
2578 #  endif /* HASSETREUID */
2579 # endif /* MAILER_SETUID_METHOD == USE_SETEUID */
2580 # if MAILER_SETUID_METHOD == USE_SETREUID
2581                                         new_ruid = RealUid;
2582 # endif /* MAILER_SETUID_METHOD == USE_SETREUID */
2583                                 }
2584                         }
2585                         else if (bitset(S_ISUID, stb.st_mode))
2586                                 new_ruid = stb.st_uid;
2587                         else if (ctladdr != NULL && ctladdr->q_uid != 0)
2588                                 new_ruid = ctladdr->q_uid;
2589                         else if (m->m_uid != NO_UID)
2590                                 new_ruid = m->m_uid;
2591                         else
2592                                 new_ruid = DefUid;
2593
2594 # if _FFR_USE_SETLOGIN
2595                         /* run disconnected from terminal and set login name */
2596                         if (setsid() >= 0 &&
2597                             ctladdr != NULL && ctladdr->q_uid != 0 &&
2598                             new_euid == ctladdr->q_uid)
2599                         {
2600                                 struct passwd *pwd;
2601
2602                                 pwd = sm_getpwuid(ctladdr->q_uid);
2603                                 if (pwd != NULL && suidwarn)
2604                                         (void) setlogin(pwd->pw_name);
2605                                 endpwent();
2606                         }
2607 # endif /* _FFR_USE_SETLOGIN */
2608
2609                         if (new_euid != NO_UID)
2610                         {
2611                                 if (RunAsUid != 0 && new_euid != RunAsUid)
2612                                 {
2613                                         /* Only root can change the uid */
2614                                         syserr("openmailer: insufficient privileges to change uid, new_euid=%d, RunAsUid=%d",
2615                                                (int) new_euid, (int) RunAsUid);
2616                                         exit(EX_TEMPFAIL);
2617                                 }
2618
2619                                 vendor_set_uid(new_euid);
2620 # if MAILER_SETUID_METHOD == USE_SETEUID
2621                                 if (seteuid(new_euid) < 0 && suidwarn)
2622                                 {
2623                                         syserr("openmailer: seteuid(%ld) failed",
2624                                                (long) new_euid);
2625                                         exit(EX_TEMPFAIL);
2626                                 }
2627 # endif /* MAILER_SETUID_METHOD == USE_SETEUID */
2628 # if MAILER_SETUID_METHOD == USE_SETREUID
2629                                 if (setreuid(new_ruid, new_euid) < 0 && suidwarn)
2630                                 {
2631                                         syserr("openmailer: setreuid(%ld, %ld) failed",
2632                                                (long) new_ruid, (long) new_euid);
2633                                         exit(EX_TEMPFAIL);
2634                                 }
2635 # endif /* MAILER_SETUID_METHOD == USE_SETREUID */
2636 # if MAILER_SETUID_METHOD == USE_SETUID
2637                                 if (new_euid != geteuid() && setuid(new_euid) < 0 && suidwarn)
2638                                 {
2639                                         syserr("openmailer: setuid(%ld) failed",
2640                                                (long) new_euid);
2641                                         exit(EX_TEMPFAIL);
2642                                 }
2643 # endif /* MAILER_SETUID_METHOD == USE_SETUID */
2644                         }
2645                         else if (new_ruid != NO_UID)
2646                         {
2647                                 vendor_set_uid(new_ruid);
2648                                 if (setuid(new_ruid) < 0 && suidwarn)
2649                                 {
2650                                         syserr("openmailer: setuid(%ld) failed",
2651                                                (long) new_ruid);
2652                                         exit(EX_TEMPFAIL);
2653                                 }
2654                         }
2655
2656                         if (tTd(11, 2))
2657                                 sm_dprintf("openmailer: running as r/euid=%d/%d, r/egid=%d/%d\n",
2658                                            (int) getuid(), (int) geteuid(),
2659                                            (int) getgid(), (int) getegid());
2660
2661                         /* move into some "safe" directory */
2662                         if (m->m_execdir != NULL)
2663                         {
2664                                 char *q;
2665
2666                                 for (p = m->m_execdir; p != NULL; p = q)
2667                                 {
2668                                         q = strchr(p, ':');
2669                                         if (q != NULL)
2670                                                 *q = '\0';
2671                                         expand(p, cbuf, sizeof(cbuf), e);
2672                                         if (q != NULL)
2673                                                 *q++ = ':';
2674                                         if (tTd(11, 20))
2675                                                 sm_dprintf("openmailer: trydir %s\n",
2676                                                            cbuf);
2677                                         if (cbuf[0] != '\0' &&
2678                                             chdir(cbuf) >= 0)
2679                                                 break;
2680                                 }
2681                         }
2682
2683                         /* Check safety of program to be run */
2684                         sff = SFF_ROOTOK|SFF_EXECOK;
2685                         if (!bitnset(DBS_RUNWRITABLEPROGRAM,
2686                                      DontBlameSendmail))
2687                                 sff |= SFF_NOGWFILES|SFF_NOWWFILES;
2688                         if (bitnset(DBS_RUNPROGRAMINUNSAFEDIRPATH,
2689                                     DontBlameSendmail))
2690                                 sff |= SFF_NOPATHCHECK;
2691                         else
2692                                 sff |= SFF_SAFEDIRPATH;
2693                         ret = safefile(m->m_mailer, getuid(), getgid(),
2694                                        user, sff, 0, NULL);
2695                         if (ret != 0)
2696                                 sm_syslog(LOG_INFO, e->e_id,
2697                                           "Warning: program %s unsafe: %s",
2698                                           m->m_mailer, sm_errstring(ret));
2699
2700                         /* arrange to filter std & diag output of command */
2701                         (void) close(rpvect[0]);
2702                         if (dup2(rpvect[1], STDOUT_FILENO) < 0)
2703                         {
2704                                 syserr("%s... openmailer(%s): cannot dup pipe %d for stdout",
2705                                        shortenstring(e->e_to, MAXSHORTSTR),
2706                                        m->m_name, rpvect[1]);
2707                                 _exit(EX_OSERR);
2708                         }
2709                         (void) close(rpvect[1]);
2710
2711                         if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0)
2712                         {
2713                                 syserr("%s... openmailer(%s): cannot dup stdout for stderr",
2714                                        shortenstring(e->e_to, MAXSHORTSTR),
2715                                        m->m_name);
2716                                 _exit(EX_OSERR);
2717                         }
2718
2719                         /* arrange to get standard input */
2720                         (void) close(mpvect[1]);
2721                         if (dup2(mpvect[0], STDIN_FILENO) < 0)
2722                         {
2723                                 syserr("%s... openmailer(%s): cannot dup pipe %d for stdin",
2724                                        shortenstring(e->e_to, MAXSHORTSTR),
2725                                        m->m_name, mpvect[0]);
2726                                 _exit(EX_OSERR);
2727                         }
2728                         (void) close(mpvect[0]);
2729
2730                         /* arrange for all the files to be closed */
2731                         sm_close_on_exec(STDERR_FILENO + 1, DtableSize);
2732
2733 # if !_FFR_USE_SETLOGIN
2734                         /* run disconnected from terminal */
2735                         (void) setsid();
2736 # endif /* !_FFR_USE_SETLOGIN */
2737
2738                         /* try to execute the mailer */
2739                         (void) execve(m->m_mailer, (ARGV_T) pv,
2740                                       (ARGV_T) UserEnviron);
2741                         save_errno = errno;
2742                         syserr("Cannot exec %s", m->m_mailer);
2743                         if (bitnset(M_LOCALMAILER, m->m_flags) ||
2744                             transienterror(save_errno))
2745                                 _exit(EX_OSERR);
2746                         _exit(EX_UNAVAILABLE);
2747                 }
2748
2749                 /*
2750                 **  Set up return value.
2751                 */
2752
2753                 if (mci == NULL)
2754                 {
2755                         if (clever)
2756                         {
2757                                 /*
2758                                 **  Allocate from general heap, not
2759                                 **  envelope rpool, because this mci
2760                                 **  is going to be cached.
2761                                 */
2762
2763                                 mci = mci_new(NULL);
2764                         }
2765                         else
2766                         {
2767                                 /*
2768                                 **  Prevent a storage leak by allocating
2769                                 **  this from the envelope rpool.
2770                                 */
2771
2772                                 mci = mci_new(e->e_rpool);
2773                         }
2774                 }
2775                 mci->mci_mailer = m;
2776                 if (clever)
2777                 {
2778                         mci->mci_state = MCIS_OPENING;
2779                         mci_cache(mci);
2780                 }
2781                 else
2782                 {
2783                         mci->mci_state = MCIS_OPEN;
2784                 }
2785                 mci->mci_pid = pid;
2786                 (void) close(mpvect[0]);
2787                 mci->mci_out = sm_io_open(SmFtStdiofd, SM_TIME_DEFAULT,
2788                                           (void *) &(mpvect[1]), SM_IO_WRONLY_B,
2789                                           NULL);
2790                 if (mci->mci_out == NULL)
2791                 {
2792                         syserr("deliver: cannot create mailer output channel, fd=%d",
2793                                mpvect[1]);
2794                         (void) close(mpvect[1]);
2795                         (void) close(rpvect[0]);
2796                         (void) close(rpvect[1]);
2797                         rcode = EX_OSERR;
2798                         goto give_up;
2799                 }
2800
2801                 (void) close(rpvect[1]);
2802                 mci->mci_in = sm_io_open(SmFtStdiofd, SM_TIME_DEFAULT,
2803                                          (void *) &(rpvect[0]), SM_IO_RDONLY_B,
2804                                          NULL);
2805                 if (mci->mci_in == NULL)
2806                 {
2807                         syserr("deliver: cannot create mailer input channel, fd=%d",
2808                                mpvect[1]);
2809                         (void) close(rpvect[0]);
2810                         (void) sm_io_close(mci->mci_out, SM_TIME_DEFAULT);
2811                         mci->mci_out = NULL;
2812                         rcode = EX_OSERR;
2813                         goto give_up;
2814                 }
2815         }
2816
2817         /*
2818         **  If we are in SMTP opening state, send initial protocol.
2819         */
2820
2821         if (bitnset(M_7BITS, m->m_flags) &&
2822             (!clever || mci->mci_state == MCIS_OPENING))
2823                 mci->mci_flags |= MCIF_7BIT;
2824         if (clever && mci->mci_state != MCIS_CLOSED)
2825         {
2826 # if STARTTLS || SASL
2827                 int dotpos;
2828                 char *srvname;
2829                 extern SOCKADDR CurHostAddr;
2830 # endif /* STARTTLS || SASL */
2831
2832 # if SASL
2833 #  define DONE_AUTH(f)          bitset(MCIF_AUTHACT, f)
2834 # endif /* SASL */
2835 # if STARTTLS
2836 #  define DONE_STARTTLS(f)      bitset(MCIF_TLSACT, f)
2837 # endif /* STARTTLS */
2838 # define ONLY_HELO(f)           bitset(MCIF_ONLY_EHLO, f)
2839 # define SET_HELO(f)            f |= MCIF_ONLY_EHLO
2840 # define CLR_HELO(f)            f &= ~MCIF_ONLY_EHLO
2841
2842 # if STARTTLS || SASL
2843                 /* don't use CurHostName, it is changed in many places */
2844                 if (mci->mci_host != NULL)
2845                 {
2846                         srvname = mci->mci_host;
2847                         dotpos = strlen(srvname) - 1;
2848                         if (dotpos >= 0)
2849                         {
2850                                 if (srvname[dotpos] == '.')
2851                                         srvname[dotpos] = '\0';
2852                                 else
2853                                         dotpos = -1;
2854                         }
2855                 }
2856                 else if (mci->mci_mailer != NULL)
2857                 {
2858                         srvname = mci->mci_mailer->m_name;
2859                         dotpos = -1;
2860                 }
2861                 else
2862                 {
2863                         srvname = "local";
2864                         dotpos = -1;
2865                 }
2866
2867                 /* don't set {server_name} to NULL or "": see getauth() */
2868                 macdefine(&mci->mci_macro, A_TEMP, macid("{server_name}"),
2869                           srvname);
2870
2871                 /* CurHostAddr is set by makeconnection() and mci_get() */
2872                 if (CurHostAddr.sa.sa_family != 0)
2873                 {
2874                         macdefine(&mci->mci_macro, A_TEMP,
2875                                   macid("{server_addr}"),
2876                                   anynet_ntoa(&CurHostAddr));
2877                 }
2878                 else if (mci->mci_mailer != NULL)
2879                 {
2880                         /* mailer name is unique, use it as address */
2881                         macdefine(&mci->mci_macro, A_PERM,
2882                                   macid("{server_addr}"),
2883                                   mci->mci_mailer->m_name);
2884                 }
2885                 else
2886                 {
2887                         /* don't set it to NULL or "": see getauth() */
2888                         macdefine(&mci->mci_macro, A_PERM,
2889                                   macid("{server_addr}"), "0");
2890                 }
2891
2892                 /* undo change of srvname (mci->mci_host) */
2893                 if (dotpos >= 0)
2894                         srvname[dotpos] = '.';
2895
2896 reconnect:      /* after switching to an encrypted connection */
2897 # endif /* STARTTLS || SASL */
2898
2899                 /* set the current connection information */
2900                 e->e_mci = mci;
2901 # if SASL
2902                 mci->mci_saslcap = NULL;
2903 # endif /* SASL */
2904                 smtpinit(m, mci, e, ONLY_HELO(mci->mci_flags));
2905                 CLR_HELO(mci->mci_flags);
2906
2907                 if (IS_DLVR_RETURN(e))
2908                 {
2909                         /*
2910                         **  Check whether other side can deliver e-mail
2911                         **  fast enough
2912                         */
2913
2914                         if (!bitset(MCIF_DLVR_BY, mci->mci_flags))
2915                         {
2916                                 e->e_status = "5.4.7";
2917                                 usrerrenh(e->e_status,
2918                                           "554 Server does not support Deliver By");
2919                                 rcode = EX_UNAVAILABLE;
2920                                 goto give_up;
2921                         }
2922                         if (e->e_deliver_by > 0 &&
2923                             e->e_deliver_by - (curtime() - e->e_ctime) <
2924                             mci->mci_min_by)
2925                         {
2926                                 e->e_status = "5.4.7";
2927                                 usrerrenh(e->e_status,
2928                                           "554 Message can't be delivered in time; %ld < %ld",
2929                                           e->e_deliver_by - (curtime() - e->e_ctime),
2930                                           mci->mci_min_by);
2931                                 rcode = EX_UNAVAILABLE;
2932                                 goto give_up;
2933                         }
2934                 }
2935
2936 # if STARTTLS
2937                 /* first TLS then AUTH to provide a security layer */
2938                 if (mci->mci_state != MCIS_CLOSED &&
2939                     !DONE_STARTTLS(mci->mci_flags))
2940                 {
2941                         int olderrors;
2942                         bool usetls;
2943                         bool saveQuickAbort = QuickAbort;
2944                         bool saveSuprErrs = SuprErrs;
2945                         char *host = NULL;
2946
2947                         rcode = EX_OK;
2948                         usetls = bitset(MCIF_TLS, mci->mci_flags);
2949                         if (usetls)
2950                                 usetls = !iscltflgset(e, D_NOTLS);
2951
2952                         host = macvalue(macid("{server_name}"), e);
2953                         if (usetls)
2954                         {
2955                                 olderrors = Errors;
2956                                 QuickAbort = false;
2957                                 SuprErrs = true;
2958                                 if (rscheck("try_tls", host, NULL, e,
2959                                             RSF_RMCOMM, 7, host, NOQID, NULL)
2960                                                                 != EX_OK
2961                                     || Errors > olderrors)
2962                                 {
2963                                         usetls = false;
2964                                 }
2965                                 SuprErrs = saveSuprErrs;
2966                                 QuickAbort = saveQuickAbort;
2967                         }
2968
2969                         if (usetls)
2970                         {
2971                                 if ((rcode = starttls(m, mci, e)) == EX_OK)
2972                                 {
2973                                         /* start again without STARTTLS */
2974                                         mci->mci_flags |= MCIF_TLSACT;
2975                                 }
2976                                 else
2977                                 {
2978                                         char *s;
2979
2980                                         /*
2981                                         **  TLS negotiation failed, what to do?
2982                                         **  fall back to unencrypted connection
2983                                         **  or abort? How to decide?
2984                                         **  set a macro and call a ruleset.
2985                                         */
2986
2987                                         mci->mci_flags &= ~MCIF_TLS;
2988                                         switch (rcode)
2989                                         {
2990                                           case EX_TEMPFAIL:
2991                                                 s = "TEMP";
2992                                                 break;
2993                                           case EX_USAGE:
2994                                                 s = "USAGE";
2995                                                 break;
2996                                           case EX_PROTOCOL:
2997                                                 s = "PROTOCOL";
2998                                                 break;
2999                                           case EX_SOFTWARE:
3000                                                 s = "SOFTWARE";
3001                                                 break;
3002                                           case EX_UNAVAILABLE:
3003                                                 s = "NONE";
3004                                                 break;
3005
3006                                           /* everything else is a failure */
3007                                           default:
3008                                                 s = "FAILURE";
3009                                                 rcode = EX_TEMPFAIL;
3010                                         }
3011                                         macdefine(&e->e_macro, A_PERM,
3012                                                   macid("{verify}"), s);
3013                                 }
3014                         }
3015                         else
3016                                 macdefine(&e->e_macro, A_PERM,
3017                                           macid("{verify}"), "NONE");
3018                         olderrors = Errors;
3019                         QuickAbort = false;
3020                         SuprErrs = true;
3021
3022                         /*
3023                         **  rcode == EX_SOFTWARE is special:
3024                         **  the TLS negotiation failed
3025                         **  we have to drop the connection no matter what
3026                         **  However, we call tls_server to give it the chance
3027                         **  to log the problem and return an appropriate
3028                         **  error code.
3029                         */
3030
3031                         if (rscheck("tls_server",
3032                                     macvalue(macid("{verify}"), e),
3033                                     NULL, e, RSF_RMCOMM|RSF_COUNT, 5,
3034                                     host, NOQID, NULL) != EX_OK ||
3035                             Errors > olderrors ||
3036                             rcode == EX_SOFTWARE)
3037                         {
3038                                 char enhsc[ENHSCLEN];
3039                                 extern char MsgBuf[];
3040
3041                                 if (ISSMTPCODE(MsgBuf) &&
3042                                     extenhsc(MsgBuf + 4, ' ', enhsc) > 0)
3043                                 {
3044                                         p = sm_rpool_strdup_x(e->e_rpool,
3045                                                               MsgBuf);
3046                                 }
3047                                 else
3048                                 {
3049                                         p = "403 4.7.0 server not authenticated.";
3050                                         (void) sm_strlcpy(enhsc, "4.7.0",
3051                                                           sizeof(enhsc));
3052                                 }
3053                                 SuprErrs = saveSuprErrs;
3054                                 QuickAbort = saveQuickAbort;
3055
3056                                 if (rcode == EX_SOFTWARE)
3057                                 {
3058                                         /* drop the connection */
3059                                         mci->mci_state = MCIS_QUITING;
3060                                         if (mci->mci_in != NULL)
3061                                         {
3062                                                 (void) sm_io_close(mci->mci_in,
3063                                                                    SM_TIME_DEFAULT);
3064                                                 mci->mci_in = NULL;
3065                                         }
3066                                         mci->mci_flags &= ~MCIF_TLSACT;
3067                                         (void) endmailer(mci, e, pv);
3068                                 }
3069                                 else
3070                                 {
3071                                         /* abort transfer */
3072                                         smtpquit(m, mci, e);
3073                                 }
3074
3075                                 /* avoid bogus error msg */
3076                                 mci->mci_errno = 0;
3077
3078                                 /* temp or permanent failure? */
3079                                 rcode = (*p == '4') ? EX_TEMPFAIL
3080                                                     : EX_UNAVAILABLE;
3081                                 mci_setstat(mci, rcode, enhsc, p);
3082
3083                                 /*
3084                                 **  hack to get the error message into
3085                                 **  the envelope (done in giveresponse())
3086                                 */
3087
3088                                 (void) sm_strlcpy(SmtpError, p,
3089                                                   sizeof(SmtpError));
3090                         }
3091                         else if (mci->mci_state == MCIS_CLOSED)
3092                         {
3093                                 /* connection close caused by 421 */
3094                                 mci->mci_errno = 0;
3095                                 rcode = EX_TEMPFAIL;
3096                                 mci_setstat(mci, rcode, NULL, "421");
3097                         }
3098                         else
3099                                 rcode = 0;
3100
3101                         QuickAbort = saveQuickAbort;
3102                         SuprErrs = saveSuprErrs;
3103                         if (DONE_STARTTLS(mci->mci_flags) &&
3104                             mci->mci_state != MCIS_CLOSED)
3105                         {
3106                                 SET_HELO(mci->mci_flags);
3107                                 mci->mci_flags &= ~MCIF_EXTENS;
3108                                 goto reconnect;
3109                         }
3110                 }
3111 # endif /* STARTTLS */
3112 # if SASL
3113                 /* if other server supports authentication let's authenticate */
3114                 if (mci->mci_state != MCIS_CLOSED &&
3115                     mci->mci_saslcap != NULL &&
3116                     !DONE_AUTH(mci->mci_flags) && !iscltflgset(e, D_NOAUTH))
3117                 {
3118                         /* Should we require some minimum authentication? */
3119                         if ((ret = smtpauth(m, mci, e)) == EX_OK)
3120                         {
3121                                 int result;
3122                                 sasl_ssf_t *ssf = NULL;
3123
3124                                 /* Get security strength (features) */
3125                                 result = sasl_getprop(mci->mci_conn, SASL_SSF,
3126 # if SASL >= 20000
3127                                                       (const void **) &ssf);
3128 # else /* SASL >= 20000 */
3129                                                       (void **) &ssf);
3130 # endif /* SASL >= 20000 */
3131
3132                                 /* XXX authid? */
3133                                 if (LogLevel > 9)
3134                                         sm_syslog(LOG_INFO, NOQID,
3135                                                   "AUTH=client, relay=%.100s, mech=%.16s, bits=%d",
3136                                                   mci->mci_host,
3137                                                   macvalue(macid("{auth_type}"), e),
3138                                                   result == SASL_OK ? *ssf : 0);
3139
3140                                 /*
3141                                 **  Only switch to encrypted connection
3142                                 **  if a security layer has been negotiated
3143                                 */
3144
3145                                 if (result == SASL_OK && *ssf > 0)
3146                                 {
3147                                         int tmo;
3148
3149                                         /*
3150                                         **  Convert I/O layer to use SASL.
3151                                         **  If the call fails, the connection
3152                                         **  is aborted.
3153                                         */
3154
3155                                         tmo = DATA_PROGRESS_TIMEOUT * 1000;
3156                                         if (sfdcsasl(&mci->mci_in,
3157                                                      &mci->mci_out,
3158                                                      mci->mci_conn, tmo) == 0)
3159                                         {
3160                                                 mci->mci_flags &= ~MCIF_EXTENS;
3161                                                 mci->mci_flags |= MCIF_AUTHACT|
3162                                                                   MCIF_ONLY_EHLO;
3163                                                 goto reconnect;
3164                                         }
3165                                         syserr("AUTH TLS switch failed in client");
3166                                 }
3167                                 /* else? XXX */
3168                                 mci->mci_flags |= MCIF_AUTHACT;
3169
3170                         }
3171                         else if (ret == EX_TEMPFAIL)
3172                         {
3173                                 if (LogLevel > 8)
3174                                         sm_syslog(LOG_ERR, NOQID,
3175                                                   "AUTH=client, relay=%.100s, temporary failure, connection abort",
3176                                                   mci->mci_host);
3177                                 smtpquit(m, mci, e);
3178
3179                                 /* avoid bogus error msg */
3180                                 mci->mci_errno = 0;
3181                                 rcode = EX_TEMPFAIL;
3182                                 mci_setstat(mci, rcode, "4.3.0", p);
3183
3184                                 /*
3185                                 **  hack to get the error message into
3186                                 **  the envelope (done in giveresponse())
3187                                 */
3188
3189                                 (void) sm_strlcpy(SmtpError,
3190                                                   "Temporary AUTH failure",
3191                                                   sizeof(SmtpError));
3192                         }
3193                 }
3194 # endif /* SASL */
3195         }
3196
3197
3198 do_transfer:
3199         /* clear out per-message flags from connection structure */
3200         mci->mci_flags &= ~(MCIF_CVT7TO8|MCIF_CVT8TO7);
3201
3202         if (bitset(EF_HAS8BIT, e->e_flags) &&
3203             !bitset(EF_DONT_MIME, e->e_flags) &&
3204             bitnset(M_7BITS, m->m_flags))
3205                 mci->mci_flags |= MCIF_CVT8TO7;
3206
3207 #if MIME7TO8
3208         if (bitnset(M_MAKE8BIT, m->m_flags) &&
3209             !bitset(MCIF_7BIT, mci->mci_flags) &&
3210             (p = hvalue("Content-Transfer-Encoding", e->e_header)) != NULL &&
3211              (sm_strcasecmp(p, "quoted-printable") == 0 ||
3212               sm_strcasecmp(p, "base64") == 0) &&
3213             (p = hvalue("Content-Type", e->e_header)) != NULL)
3214         {
3215                 /* may want to convert 7 -> 8 */
3216                 /* XXX should really parse it here -- and use a class XXX */
3217                 if (sm_strncasecmp(p, "text/plain", 10) == 0 &&
3218                     (p[10] == '\0' || p[10] == ' ' || p[10] == ';'))
3219                         mci->mci_flags |= MCIF_CVT7TO8;
3220         }
3221 #endif /* MIME7TO8 */
3222
3223         if (tTd(11, 1))
3224         {
3225                 sm_dprintf("openmailer: ");
3226                 mci_dump(sm_debug_file(), mci, false);
3227         }
3228
3229 #if _FFR_CLIENT_SIZE
3230         /*
3231         **  See if we know the maximum size and
3232         **  abort if the message is too big.
3233         **
3234         **  NOTE: _FFR_CLIENT_SIZE is untested.
3235         */
3236
3237         if (bitset(MCIF_SIZE, mci->mci_flags) &&
3238             mci->mci_maxsize > 0 &&
3239             e->e_msgsize > mci->mci_maxsize)
3240         {
3241                 e->e_flags |= EF_NO_BODY_RETN;
3242                 if (bitnset(M_LOCALMAILER, m->m_flags))
3243                         e->e_status = "5.2.3";
3244                 else
3245                         e->e_status = "5.3.4";
3246
3247                 usrerrenh(e->e_status,
3248                           "552 Message is too large; %ld bytes max",
3249                           mci->mci_maxsize);
3250                 rcode = EX_DATAERR;
3251
3252                 /* Need an e_message for error */
3253                 (void) sm_snprintf(SmtpError, sizeof(SmtpError),
3254                                    "Message is too large; %ld bytes max",
3255                                    mci->mci_maxsize);
3256                 goto give_up;
3257         }
3258 #endif /* _FFR_CLIENT_SIZE */
3259
3260         if (mci->mci_state != MCIS_OPEN)
3261         {
3262                 /* couldn't open the mailer */
3263                 rcode = mci->mci_exitstat;
3264                 errno = mci->mci_errno;
3265                 SM_SET_H_ERRNO(mci->mci_herrno);
3266                 if (rcode == EX_OK)
3267                 {
3268                         /* shouldn't happen */
3269                         syserr("554 5.3.5 deliver: mci=%lx rcode=%d errno=%d state=%d sig=%s",
3270                                (unsigned long) mci, rcode, errno,
3271                                mci->mci_state, firstsig);
3272                         mci_dump_all(smioout, true);
3273                         rcode = EX_SOFTWARE;
3274                 }
3275                 else if (nummxhosts > hostnum)
3276                 {
3277                         /* try next MX site */
3278                         goto tryhost;
3279                 }
3280         }
3281         else if (!clever)
3282         {
3283                 bool ok;
3284
3285                 /*
3286                 **  Format and send message.
3287                 */
3288
3289                 rcode = EX_OK;
3290                 errno = 0;
3291                 ok = putfromline(mci, e);
3292                 if (ok)
3293                         ok = (*e->e_puthdr)(mci, e->e_header, e, M87F_OUTER);
3294                 if (ok)
3295                         ok = (*e->e_putbody)(mci, e, NULL);
3296                 if (ok && bitset(MCIF_INLONGLINE, mci->mci_flags))
3297                         ok = putline("", mci);
3298
3299                 /*
3300                 **  Ignore an I/O error that was caused by EPIPE.
3301                 **  Some broken mailers don't read the entire body
3302                 **  but just exit() thus causing an I/O error.
3303                 */
3304
3305                 if (!ok && (sm_io_error(mci->mci_out) && errno == EPIPE))
3306                         ok = true;
3307
3308                 /* (always) get the exit status */
3309                 rcode = endmailer(mci, e, pv);
3310                 if (!ok)
3311                         rcode = EX_TEMPFAIL;
3312                 if (rcode == EX_TEMPFAIL && SmtpError[0] == '\0')
3313                 {
3314                         /*
3315                         **  Need an e_message for mailq display.
3316                         **  We set SmtpError as
3317                         */
3318
3319                         (void) sm_snprintf(SmtpError, sizeof(SmtpError),
3320                                            "%s mailer (%s) exited with EX_TEMPFAIL",
3321                                            m->m_name, m->m_mailer);
3322                 }
3323         }
3324         else
3325         {
3326                 /*
3327                 **  Send the MAIL FROM: protocol
3328                 */
3329
3330                 /* XXX this isn't pipelined... */
3331                 rcode = smtpmailfrom(m, mci, e);
3332                 if (rcode == EX_OK)
3333                 {
3334                         register int i;
3335 # if PIPELINING
3336                         ADDRESS *volatile pchain;
3337 # endif /* PIPELINING */
3338
3339                         /* send the recipient list */
3340                         tobuf[0] = '\0';
3341                         mci->mci_retryrcpt = false;
3342                         mci->mci_tolist = tobuf;
3343 # if PIPELINING
3344                         pchain = NULL;
3345                         mci->mci_nextaddr = NULL;
3346 # endif /* PIPELINING */
3347
3348                         for (to = tochain; to != NULL; to = to->q_tchain)
3349                         {
3350                                 if (!QS_IS_UNMARKED(to->q_state))
3351                                         continue;
3352
3353                                 /* mark recipient state as "ok so far" */
3354                                 to->q_state = QS_OK;
3355                                 e->e_to = to->q_paddr;
3356 # if STARTTLS
3357                                 i = rscheck("tls_rcpt", to->q_user, NULL, e,
3358                                             RSF_RMCOMM|RSF_COUNT, 3,
3359                                             mci->mci_host, e->e_id, NULL);
3360                                 if (i != EX_OK)
3361                                 {
3362                                         markfailure(e, to, mci, i, false);
3363                                         giveresponse(i, to->q_status,  m, mci,
3364                                                      ctladdr, xstart, e, to);
3365                                         if (i == EX_TEMPFAIL)
3366                                         {
3367                                                 mci->mci_retryrcpt = true;
3368                                                 to->q_state = QS_RETRY;
3369                                         }
3370                                         continue;
3371                                 }
3372 # endif /* STARTTLS */
3373
3374                                 i = smtprcpt(to, m, mci, e, ctladdr, xstart);
3375 # if PIPELINING
3376                                 if (i == EX_OK &&
3377                                     bitset(MCIF_PIPELINED, mci->mci_flags))
3378                                 {
3379                                         /*
3380                                         **  Add new element to list of
3381                                         **  recipients for pipelining.
3382                                         */
3383
3384                                         to->q_pchain = NULL;
3385                                         if (mci->mci_nextaddr == NULL)
3386                                                 mci->mci_nextaddr = to;
3387                                         if (pchain == NULL)
3388                                                 pchain = to;
3389                                         else
3390                                         {
3391                                                 pchain->q_pchain = to;
3392                                                 pchain = pchain->q_pchain;
3393                                         }
3394                                 }
3395 # endif /* PIPELINING */
3396                                 if (i != EX_OK)
3397                                 {
3398                                         markfailure(e, to, mci, i, false);
3399                                         giveresponse(i, to->q_status, m, mci,
3400                                                      ctladdr, xstart, e, to);
3401                                         if (i == EX_TEMPFAIL)
3402                                                 to->q_state = QS_RETRY;
3403                                 }
3404                         }
3405
3406                         /* No recipients in list and no missing responses? */
3407                         if (tobuf[0] == '\0'
3408 # if PIPELINING
3409                             && bitset(MCIF_PIPELINED, mci->mci_flags)
3410                             && mci->mci_nextaddr == NULL
3411 # endif /* PIPELINING */
3412                            )
3413                         {
3414                                 rcode = EX_OK;
3415                                 e->e_to = NULL;
3416                                 if (bitset(MCIF_CACHED, mci->mci_flags))
3417                                         smtprset(m, mci, e);
3418                         }
3419                         else
3420                         {
3421                                 e->e_to = tobuf + 1;
3422                                 rcode = smtpdata(m, mci, e, ctladdr, xstart);
3423                         }
3424                 }
3425                 if (rcode == EX_TEMPFAIL && nummxhosts > hostnum)
3426                 {
3427                         /* try next MX site */
3428                         goto tryhost;
3429                 }
3430         }
3431 #if NAMED_BIND
3432         if (ConfigLevel < 2)
3433                 _res.options |= RES_DEFNAMES | RES_DNSRCH;      /* XXX */
3434 #endif /* NAMED_BIND */
3435
3436         if (tTd(62, 1))
3437                 checkfds("after delivery");
3438
3439         /*
3440         **  Do final status disposal.
3441         **      We check for something in tobuf for the SMTP case.
3442         **      If we got a temporary failure, arrange to queue the
3443         **              addressees.
3444         */
3445
3446   give_up:
3447         if (bitnset(M_LMTP, m->m_flags))
3448         {
3449                 lmtp_rcode = rcode;
3450                 tobuf[0] = '\0';
3451                 anyok = false;
3452                 strsize = 0;
3453         }
3454         else
3455                 anyok = rcode == EX_OK;
3456
3457         for (to = tochain; to != NULL; to = to->q_tchain)
3458         {
3459                 /* see if address already marked */
3460                 if (!QS_IS_OK(to->q_state))
3461                         continue;
3462
3463                 /* if running LMTP, get the status for each address */
3464                 if (bitnset(M_LMTP, m->m_flags))
3465                 {
3466                         if (lmtp_rcode == EX_OK)
3467                                 rcode = smtpgetstat(m, mci, e);
3468                         if (rcode == EX_OK)
3469                         {
3470                                 strsize += sm_strlcat2(tobuf + strsize, ",",
3471                                                 to->q_paddr,
3472                                                 tobufsize - strsize);
3473                                 SM_ASSERT(strsize < tobufsize);
3474                                 anyok = true;
3475                         }
3476                         else
3477                         {
3478                                 e->e_to = to->q_paddr;
3479                                 markfailure(e, to, mci, rcode, true);
3480                                 giveresponse(rcode, to->q_status, m, mci,
3481                                              ctladdr, xstart, e, to);
3482                                 e->e_to = tobuf + 1;
3483                                 continue;
3484                         }
3485                 }
3486                 else
3487                 {
3488                         /* mark bad addresses */
3489                         if (rcode != EX_OK)
3490                         {
3491                                 if (goodmxfound && rcode == EX_NOHOST)
3492                                         rcode = EX_TEMPFAIL;
3493                                 markfailure(e, to, mci, rcode, true);
3494                                 continue;
3495                         }
3496                 }
3497
3498                 /* successful delivery */
3499                 to->q_state = QS_SENT;
3500                 to->q_statdate = curtime();
3501                 e->e_nsent++;
3502
3503                 /*
3504                 **  Checkpoint the send list every few addresses
3505                 */
3506
3507                 if (CheckpointInterval > 0 && e->e_nsent >= CheckpointInterval)
3508                 {
3509                         queueup(e, false, false);
3510                         e->e_nsent = 0;
3511                 }
3512
3513                 if (bitnset(M_LOCALMAILER, m->m_flags) &&
3514                     bitset(QPINGONSUCCESS, to->q_flags))
3515                 {
3516                         to->q_flags |= QDELIVERED;
3517                         to->q_status = "2.1.5";
3518                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3519                                              "%s... Successfully delivered\n",
3520                                              to->q_paddr);
3521                 }
3522                 else if (bitset(QPINGONSUCCESS, to->q_flags) &&
3523                          bitset(QPRIMARY, to->q_flags) &&
3524                          !bitset(MCIF_DSN, mci->mci_flags))
3525                 {
3526                         to->q_flags |= QRELAYED;
3527                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3528                                              "%s... relayed; expect no further notifications\n",
3529                                              to->q_paddr);
3530                 }
3531                 else if (IS_DLVR_NOTIFY(e) &&
3532                          !bitset(MCIF_DLVR_BY, mci->mci_flags) &&
3533                          bitset(QPRIMARY, to->q_flags) &&
3534                          (!bitset(QHASNOTIFY, to->q_flags) ||
3535                           bitset(QPINGONSUCCESS, to->q_flags) ||
3536                           bitset(QPINGONFAILURE, to->q_flags) ||
3537                           bitset(QPINGONDELAY, to->q_flags)))
3538                 {
3539                         /* RFC 2852, 4.1.4.2: no NOTIFY, or not NEVER */
3540                         to->q_flags |= QBYNRELAY;
3541                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3542                                              "%s... Deliver-by notify: relayed\n",
3543                                              to->q_paddr);
3544                 }
3545                 else if (IS_DLVR_TRACE(e) &&
3546                          (!bitset(QHASNOTIFY, to->q_flags) ||
3547                           bitset(QPINGONSUCCESS, to->q_flags) ||
3548                           bitset(QPINGONFAILURE, to->q_flags) ||
3549                           bitset(QPINGONDELAY, to->q_flags)) &&
3550                          bitset(QPRIMARY, to->q_flags))
3551                 {
3552                         /* RFC 2852, 4.1.4: no NOTIFY, or not NEVER */
3553                         to->q_flags |= QBYTRACE;
3554                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3555                                              "%s... Deliver-By trace: relayed\n",
3556                                              to->q_paddr);
3557                 }
3558         }
3559
3560         if (bitnset(M_LMTP, m->m_flags))
3561         {
3562                 /*
3563                 **  Global information applies to the last recipient only;
3564                 **  clear it out to avoid bogus errors.
3565                 */
3566
3567                 rcode = EX_OK;
3568                 e->e_statmsg = NULL;
3569
3570                 /* reset the mci state for the next transaction */
3571                 if (mci != NULL &&
3572                     (mci->mci_state == MCIS_MAIL ||
3573                      mci->mci_state == MCIS_RCPT ||
3574                      mci->mci_state == MCIS_DATA))
3575                 {
3576                         mci->mci_state = MCIS_OPEN;
3577                         SmtpPhase = mci->mci_phase = "idle";
3578                         sm_setproctitle(true, e, "%s: %s", CurHostName,
3579                                         mci->mci_phase);
3580                 }
3581         }
3582
3583         if (tobuf[0] != '\0')
3584         {
3585                 giveresponse(rcode, NULL, m, mci, ctladdr, xstart, e, tochain);
3586 #if 0
3587                 /*
3588                 **  This code is disabled for now because I am not
3589                 **  sure that copying status from the first recipient
3590                 **  to all non-status'ed recipients is a good idea.
3591                 */
3592
3593                 if (tochain->q_message != NULL &&
3594                     !bitnset(M_LMTP, m->m_flags) && rcode != EX_OK)
3595                 {
3596                         for (to = tochain->q_tchain; to != NULL;
3597                              to = to->q_tchain)
3598                         {
3599                                 /* see if address already marked */
3600                                 if (QS_IS_QUEUEUP(to->q_state) &&
3601                                     to->q_message == NULL)
3602                                         to->q_message = sm_rpool_strdup_x(e->e_rpool,
3603                                                         tochain->q_message);
3604                         }
3605                 }
3606 #endif /* 0 */
3607         }
3608         if (anyok)
3609                 markstats(e, tochain, STATS_NORMAL);
3610         mci_store_persistent(mci);
3611
3612         /* Some recipients were tempfailed, try them on the next host */
3613         if (mci != NULL && mci->mci_retryrcpt && nummxhosts > hostnum)
3614         {
3615                 /* try next MX site */
3616                 goto tryhost;
3617         }
3618
3619         /* now close the connection */
3620         if (clever && mci != NULL && mci->mci_state != MCIS_CLOSED &&
3621             !bitset(MCIF_CACHED, mci->mci_flags))
3622                 smtpquit(m, mci, e);
3623
3624 cleanup: ;
3625         }
3626         SM_FINALLY
3627         {
3628                 /*
3629                 **  Restore state and return.
3630                 */
3631 #if XDEBUG
3632                 char wbuf[MAXLINE];
3633
3634                 /* make absolutely certain 0, 1, and 2 are in use */
3635                 (void) sm_snprintf(wbuf, sizeof(wbuf),
3636                                    "%s... end of deliver(%s)",
3637                                    e->e_to == NULL ? "NO-TO-LIST"
3638                                                    : shortenstring(e->e_to,
3639                                                                    MAXSHORTSTR),
3640                                   m->m_name);
3641                 checkfd012(wbuf);
3642 #endif /* XDEBUG */
3643
3644                 errno = 0;
3645
3646                 /*
3647                 **  It was originally necessary to set macro 'g' to NULL
3648                 **  because it previously pointed to an auto buffer.
3649                 **  We don't do this any more, so this may be unnecessary.
3650                 */
3651
3652                 macdefine(&e->e_macro, A_PERM, 'g', (char *) NULL);
3653                 e->e_to = NULL;
3654         }
3655         SM_END_TRY
3656         return rcode;
3657 }
3658
3659 /*
3660 **  MARKFAILURE -- mark a failure on a specific address.
3661 **
3662 **      Parameters:
3663 **              e -- the envelope we are sending.
3664 **              q -- the address to mark.
3665 **              mci -- mailer connection information.
3666 **              rcode -- the code signifying the particular failure.
3667 **              ovr -- override an existing code?
3668 **
3669 **      Returns:
3670 **              none.
3671 **
3672 **      Side Effects:
3673 **              marks the address (and possibly the envelope) with the
3674 **                      failure so that an error will be returned or
3675 **                      the message will be queued, as appropriate.
3676 */
3677
3678 void
3679 markfailure(e, q, mci, rcode, ovr)
3680         register ENVELOPE *e;
3681         register ADDRESS *q;
3682         register MCI *mci;
3683         int rcode;
3684         bool ovr;
3685 {
3686         int save_errno = errno;
3687         char *status = NULL;
3688         char *rstatus = NULL;
3689
3690         switch (rcode)
3691         {
3692           case EX_OK:
3693                 break;
3694
3695           case EX_TEMPFAIL:
3696           case EX_IOERR:
3697           case EX_OSERR:
3698                 q->q_state = QS_QUEUEUP;
3699                 break;
3700
3701           default:
3702                 q->q_state = QS_BADADDR;
3703                 break;
3704         }
3705
3706         /* find most specific error code possible */
3707         if (mci != NULL && mci->mci_status != NULL)
3708         {
3709                 status = sm_rpool_strdup_x(e->e_rpool, mci->mci_status);
3710                 if (mci->mci_rstatus != NULL)
3711                         rstatus = sm_rpool_strdup_x(e->e_rpool,
3712                                                     mci->mci_rstatus);
3713                 else
3714                         rstatus = NULL;
3715         }
3716         else if (e->e_status != NULL)
3717         {
3718                 status = e->e_status;
3719                 rstatus = NULL;
3720         }
3721         else
3722         {
3723                 switch (rcode)
3724                 {
3725                   case EX_USAGE:
3726                         status = "5.5.4";
3727                         break;
3728
3729                   case EX_DATAERR:
3730                         status = "5.5.2";
3731                         break;
3732
3733                   case EX_NOUSER:
3734                         status = "5.1.1";
3735                         break;
3736
3737                   case EX_NOHOST:
3738                         status = "5.1.2";
3739                         break;
3740
3741                   case EX_NOINPUT:
3742                   case EX_CANTCREAT:
3743                   case EX_NOPERM:
3744                         status = "5.3.0";
3745                         break;
3746
3747                   case EX_UNAVAILABLE:
3748                   case EX_SOFTWARE:
3749                   case EX_OSFILE:
3750                   case EX_PROTOCOL:
3751                   case EX_CONFIG:
3752                         status = "5.5.0";
3753                         break;
3754
3755                   case EX_OSERR:
3756                   case EX_IOERR:
3757                         status = "4.5.0";
3758                         break;
3759
3760                   case EX_TEMPFAIL:
3761                         status = "4.2.0";
3762                         break;
3763                 }
3764         }
3765
3766         /* new status? */
3767         if (status != NULL && *status != '\0' && (ovr || q->q_status == NULL ||
3768             *q->q_status == '\0' || *q->q_status < *status))
3769         {
3770                 q->q_status = status;
3771                 q->q_rstatus = rstatus;
3772         }
3773         if (rcode != EX_OK && q->q_rstatus == NULL &&
3774             q->q_mailer != NULL && q->q_mailer->m_diagtype != NULL &&
3775             sm_strcasecmp(q->q_mailer->m_diagtype, "X-UNIX") == 0)
3776         {
3777                 char buf[16];
3778
3779                 (void) sm_snprintf(buf, sizeof(buf), "%d", rcode);
3780                 q->q_rstatus = sm_rpool_strdup_x(e->e_rpool, buf);
3781         }
3782
3783         q->q_statdate = curtime();
3784         if (CurHostName != NULL && CurHostName[0] != '\0' &&
3785             mci != NULL && !bitset(M_LOCALMAILER, mci->mci_flags))
3786                 q->q_statmta = sm_rpool_strdup_x(e->e_rpool, CurHostName);
3787
3788         /* restore errno */
3789         errno = save_errno;
3790 }
3791 /*
3792 **  ENDMAILER -- Wait for mailer to terminate.
3793 **
3794 **      We should never get fatal errors (e.g., segmentation
3795 **      violation), so we report those specially.  For other
3796 **      errors, we choose a status message (into statmsg),
3797 **      and if it represents an error, we print it.
3798 **
3799 **      Parameters:
3800 **              mci -- the mailer connection info.
3801 **              e -- the current envelope.
3802 **              pv -- the parameter vector that invoked the mailer
3803 **                      (for error messages).
3804 **
3805 **      Returns:
3806 **              exit code of mailer.
3807 **
3808 **      Side Effects:
3809 **              none.
3810 */
3811
3812 static jmp_buf  EndWaitTimeout;
3813
3814 static void
3815 endwaittimeout(ignore)
3816         int ignore;
3817 {
3818         /*
3819         **  NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
3820         **      ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
3821         **      DOING.
3822         */
3823
3824         errno = ETIMEDOUT;
3825         longjmp(EndWaitTimeout, 1);
3826 }
3827
3828 int
3829 endmailer(mci, e, pv)
3830         register MCI *mci;
3831         register ENVELOPE *e;
3832         char **pv;
3833 {
3834         int st;
3835         int save_errno = errno;
3836         char buf[MAXLINE];
3837         SM_EVENT *ev = NULL;
3838
3839
3840         mci_unlock_host(mci);
3841
3842         /* close output to mailer */
3843         if (mci->mci_out != NULL)
3844         {
3845                 (void) sm_io_close(mci->mci_out, SM_TIME_DEFAULT);
3846                 mci->mci_out = NULL;
3847         }
3848
3849         /* copy any remaining input to transcript */
3850         if (mci->mci_in != NULL && mci->mci_state != MCIS_ERROR &&
3851             e->e_xfp != NULL)
3852         {
3853                 while (sfgets(buf, sizeof(buf), mci->mci_in,
3854                               TimeOuts.to_quit, "Draining Input") != NULL)
3855                         (void) sm_io_fputs(e->e_xfp, SM_TIME_DEFAULT, buf);
3856         }
3857
3858 #if SASL
3859         /* close SASL connection */
3860         if (bitset(MCIF_AUTHACT, mci->mci_flags))
3861         {
3862                 sasl_dispose(&mci->mci_conn);
3863                 mci->mci_flags &= ~MCIF_AUTHACT;
3864         }
3865 #endif /* SASL */
3866
3867 #if STARTTLS
3868         /* shutdown TLS */
3869         (void) endtlsclt(mci);
3870 #endif /* STARTTLS */
3871
3872         /* now close the input */
3873         if (mci->mci_in != NULL)
3874         {
3875                 (void) sm_io_close(mci->mci_in, SM_TIME_DEFAULT);
3876                 mci->mci_in = NULL;
3877         }
3878         mci->mci_state = MCIS_CLOSED;
3879
3880         errno = save_errno;
3881
3882         /* in the IPC case there is nothing to wait for */
3883         if (mci->mci_pid == 0)
3884                 return EX_OK;
3885
3886         /* put a timeout around the wait */
3887         if (mci->mci_mailer->m_wait > 0)
3888         {
3889                 if (setjmp(EndWaitTimeout) == 0)
3890                         ev = sm_setevent(mci->mci_mailer->m_wait,
3891                                          endwaittimeout, 0);
3892                 else
3893                 {
3894                         syserr("endmailer %s: wait timeout (%ld)",
3895                                mci->mci_mailer->m_name,
3896                                (long) mci->mci_mailer->m_wait);
3897                         return EX_TEMPFAIL;
3898                 }
3899         }
3900
3901         /* wait for the mailer process, collect status */
3902         st = waitfor(mci->mci_pid);
3903         save_errno = errno;
3904         if (ev != NULL)
3905                 sm_clrevent(ev);
3906         errno = save_errno;
3907
3908         if (st == -1)
3909         {
3910                 syserr("endmailer %s: wait", mci->mci_mailer->m_name);
3911                 return EX_SOFTWARE;
3912         }
3913
3914         if (WIFEXITED(st))
3915         {
3916                 /* normal death -- return status */
3917                 return (WEXITSTATUS(st));
3918         }
3919
3920         /* it died a horrid death */
3921         syserr("451 4.3.0 mailer %s died with signal %d%s",
3922                 mci->mci_mailer->m_name, WTERMSIG(st),
3923                 WCOREDUMP(st) ? " (core dumped)" :
3924                 (WIFSTOPPED(st) ? " (stopped)" : ""));
3925
3926         /* log the arguments */
3927         if (pv != NULL && e->e_xfp != NULL)
3928         {
3929                 register char **av;
3930
3931                 (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, "Arguments:");
3932                 for (av = pv; *av != NULL; av++)
3933                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, " %s",
3934                                              *av);
3935                 (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, "\n");
3936         }
3937
3938         ExitStat = EX_TEMPFAIL;
3939         return EX_TEMPFAIL;
3940 }
3941 /*
3942 **  GIVERESPONSE -- Interpret an error response from a mailer
3943 **
3944 **      Parameters:
3945 **              status -- the status code from the mailer (high byte
3946 **                      only; core dumps must have been taken care of
3947 **                      already).
3948 **              dsn -- the DSN associated with the address, if any.
3949 **              m -- the mailer info for this mailer.
3950 **              mci -- the mailer connection info -- can be NULL if the
3951 **                      response is given before the connection is made.
3952 **              ctladdr -- the controlling address for the recipient
3953 **                      address(es).
3954 **              xstart -- the transaction start time, for computing
3955 **                      transaction delays.
3956 **              e -- the current envelope.
3957 **              to -- the current recipient (NULL if none).
3958 **
3959 **      Returns:
3960 **              none.
3961 **
3962 **      Side Effects:
3963 **              Errors may be incremented.
3964 **              ExitStat may be set.
3965 */
3966
3967 void
3968 giveresponse(status, dsn, m, mci, ctladdr, xstart, e, to)
3969         int status;
3970         char *dsn;
3971         register MAILER *m;
3972         register MCI *mci;
3973         ADDRESS *ctladdr;
3974         time_t xstart;
3975         ENVELOPE *e;
3976         ADDRESS *to;
3977 {
3978         register const char *statmsg;
3979         int errnum = errno;
3980         int off = 4;
3981         bool usestat = false;
3982         char dsnbuf[ENHSCLEN];
3983         char buf[MAXLINE];
3984         char *exmsg;
3985
3986         if (e == NULL)
3987         {
3988                 syserr("giveresponse: null envelope");
3989                 /* NOTREACHED */
3990                 SM_ASSERT(0);
3991         }
3992
3993         /*
3994         **  Compute status message from code.
3995         */
3996
3997         exmsg = sm_sysexmsg(status);
3998         if (status == 0)
3999         {
4000                 statmsg = "250 2.0.0 Sent";
4001                 if (e->e_statmsg != NULL)
4002                 {
4003                         (void) sm_snprintf(buf, sizeof(buf), "%s (%s)",
4004                                            statmsg,
4005                                            shortenstring(e->e_statmsg, 403));
4006                         statmsg = buf;
4007                 }
4008         }
4009         else if (exmsg == NULL)
4010         {
4011                 (void) sm_snprintf(buf, sizeof(buf),
4012                                    "554 5.3.0 unknown mailer error %d",
4013                                    status);
4014                 status = EX_UNAVAILABLE;
4015                 statmsg = buf;
4016                 usestat = true;
4017         }
4018         else if (status == EX_TEMPFAIL)
4019         {
4020                 char *bp = buf;
4021
4022                 (void) sm_strlcpy(bp, exmsg + 1, SPACELEFT(buf, bp));
4023                 bp += strlen(bp);
4024 #if NAMED_BIND
4025                 if (h_errno == TRY_AGAIN)
4026                         statmsg = sm_errstring(h_errno + E_DNSBASE);
4027                 else
4028 #endif /* NAMED_BIND */
4029                 {
4030                         if (errnum != 0)
4031                                 statmsg = sm_errstring(errnum);
4032                         else
4033                                 statmsg = SmtpError;
4034                 }
4035                 if (statmsg != NULL && statmsg[0] != '\0')
4036                 {
4037                         switch (errnum)
4038                         {
4039 #ifdef ENETDOWN
4040                           case ENETDOWN:        /* Network is down */
4041 #endif /* ENETDOWN */
4042 #ifdef ENETUNREACH
4043                           case ENETUNREACH:     /* Network is unreachable */
4044 #endif /* ENETUNREACH */
4045 #ifdef ENETRESET
4046                           case ENETRESET:       /* Network dropped connection on reset */
4047 #endif /* ENETRESET */
4048 #ifdef ECONNABORTED
4049                           case ECONNABORTED:    /* Software caused connection abort */
4050 #endif /* ECONNABORTED */
4051 #ifdef EHOSTDOWN
4052                           case EHOSTDOWN:       /* Host is down */
4053 #endif /* EHOSTDOWN */
4054 #ifdef EHOSTUNREACH
4055                           case EHOSTUNREACH:    /* No route to host */
4056 #endif /* EHOSTUNREACH */
4057                                 if (mci != NULL && mci->mci_host != NULL)
4058                                 {
4059                                         (void) sm_strlcpyn(bp,
4060                                                            SPACELEFT(buf, bp),
4061                                                            2, ": ",
4062                                                            mci->mci_host);
4063                                         bp += strlen(bp);
4064                                 }
4065                                 break;
4066                         }
4067                         (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ": ",
4068                                            statmsg);
4069                         usestat = true;
4070                 }
4071                 statmsg = buf;
4072         }
4073 #if NAMED_BIND
4074         else if (status == EX_NOHOST && h_errno != 0)
4075         {
4076                 statmsg = sm_errstring(h_errno + E_DNSBASE);
4077                 (void) sm_snprintf(buf, sizeof(buf), "%s (%s)", exmsg + 1,
4078                                    statmsg);
4079                 statmsg = buf;
4080                 usestat = true;
4081         }
4082 #endif /* NAMED_BIND */
4083         else
4084         {
4085                 statmsg = exmsg;
4086                 if (*statmsg++ == ':' && errnum != 0)
4087                 {
4088                         (void) sm_snprintf(buf, sizeof(buf), "%s: %s", statmsg,
4089                                            sm_errstring(errnum));
4090                         statmsg = buf;
4091                         usestat = true;
4092                 }
4093                 else if (bitnset(M_LMTP, m->m_flags) && e->e_statmsg != NULL)
4094                 {
4095                         (void) sm_snprintf(buf, sizeof(buf), "%s (%s)", statmsg,
4096                                            shortenstring(e->e_statmsg, 403));
4097                         statmsg = buf;
4098                         usestat = true;
4099                 }
4100         }
4101
4102         /*
4103         **  Print the message as appropriate
4104         */
4105
4106         if (status == EX_OK || status == EX_TEMPFAIL)
4107         {
4108                 extern char MsgBuf[];
4109
4110                 if ((off = isenhsc(statmsg + 4, ' ')) > 0)
4111                 {
4112                         if (dsn == NULL)
4113                         {
4114                                 (void) sm_snprintf(dsnbuf, sizeof(dsnbuf),
4115                                                    "%.*s", off, statmsg + 4);
4116                                 dsn = dsnbuf;
4117                         }
4118                         off += 5;
4119                 }
4120                 else
4121                 {
4122                         off = 4;
4123                 }
4124                 message("%s", statmsg + off);
4125                 if (status == EX_TEMPFAIL && e->e_xfp != NULL)
4126                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, "%s\n",
4127                                              &MsgBuf[4]);
4128         }
4129         else
4130         {
4131                 char mbuf[ENHSCLEN + 4];
4132
4133                 Errors++;
4134                 if ((off = isenhsc(statmsg + 4, ' ')) > 0 &&
4135                     off < sizeof(mbuf) - 4)
4136                 {
4137                         if (dsn == NULL)
4138                         {
4139                                 (void) sm_snprintf(dsnbuf, sizeof(dsnbuf),
4140                                                    "%.*s", off, statmsg + 4);
4141                                 dsn = dsnbuf;
4142                         }
4143                         off += 5;
4144
4145                         /* copy only part of statmsg to mbuf */
4146                         (void) sm_strlcpy(mbuf, statmsg, off);
4147                         (void) sm_strlcat(mbuf, " %s", sizeof(mbuf));
4148                 }
4149                 else
4150                 {
4151                         dsnbuf[0] = '\0';
4152                         (void) sm_snprintf(mbuf, sizeof(mbuf), "%.3s %%s",
4153                                            statmsg);
4154                         off = 4;
4155                 }
4156                 usrerr(mbuf, &statmsg[off]);
4157         }
4158
4159         /*
4160         **  Final cleanup.
4161         **      Log a record of the transaction.  Compute the new
4162         **      ExitStat -- if we already had an error, stick with
4163         **      that.
4164         */
4165
4166         if (OpMode != MD_VERIFY && !bitset(EF_VRFYONLY, e->e_flags) &&
4167             LogLevel > ((status == EX_TEMPFAIL) ? 8 : (status == EX_OK) ? 7 : 6))
4168                 logdelivery(m, mci, dsn, statmsg + off, ctladdr, xstart, e);
4169
4170         if (tTd(11, 2))
4171                 sm_dprintf("giveresponse: status=%d, dsn=%s, e->e_message=%s, errnum=%d\n",
4172                            status,
4173                            dsn == NULL ? "<NULL>" : dsn,
4174                            e->e_message == NULL ? "<NULL>" : e->e_message,
4175                            errnum);
4176
4177         if (status != EX_TEMPFAIL)
4178                 setstat(status);
4179         if (status != EX_OK && (status != EX_TEMPFAIL || e->e_message == NULL))
4180                 e->e_message = sm_rpool_strdup_x(e->e_rpool, statmsg + off);
4181         if (status != EX_OK && to != NULL && to->q_message == NULL)
4182         {
4183                 if (!usestat && e->e_message != NULL)
4184                         to->q_message = sm_rpool_strdup_x(e->e_rpool,
4185                                                           e->e_message);
4186                 else
4187                         to->q_message = sm_rpool_strdup_x(e->e_rpool,
4188                                                           statmsg + off);
4189         }
4190         errno = 0;
4191         SM_SET_H_ERRNO(0);
4192 }
4193 /*
4194 **  LOGDELIVERY -- log the delivery in the system log
4195 **
4196 **      Care is taken to avoid logging lines that are too long, because
4197 **      some versions of syslog have an unfortunate proclivity for core
4198 **      dumping.  This is a hack, to be sure, that is at best empirical.
4199 **
4200 **      Parameters:
4201 **              m -- the mailer info.  Can be NULL for initial queue.
4202 **              mci -- the mailer connection info -- can be NULL if the
4203 **                      log is occurring when no connection is active.
4204 **              dsn -- the DSN attached to the status.
4205 **              status -- the message to print for the status.
4206 **              ctladdr -- the controlling address for the to list.
4207 **              xstart -- the transaction start time, used for
4208 **                      computing transaction delay.
4209 **              e -- the current envelope.
4210 **
4211 **      Returns:
4212 **              none
4213 **
4214 **      Side Effects:
4215 **              none
4216 */
4217
4218 void
4219 logdelivery(m, mci, dsn, status, ctladdr, xstart, e)
4220         MAILER *m;
4221         register MCI *mci;
4222         char *dsn;
4223         const char *status;
4224         ADDRESS *ctladdr;
4225         time_t xstart;
4226         register ENVELOPE *e;
4227 {
4228         register char *bp;
4229         register char *p;
4230         int l;
4231         time_t now = curtime();
4232         char buf[1024];
4233
4234 #if (SYSLOG_BUFSIZE) >= 256
4235         /* ctladdr: max 106 bytes */
4236         bp = buf;
4237         if (ctladdr != NULL)
4238         {
4239                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", ctladdr=",
4240                                    shortenstring(ctladdr->q_paddr, 83));
4241                 bp += strlen(bp);
4242                 if (bitset(QGOODUID, ctladdr->q_flags))
4243                 {
4244                         (void) sm_snprintf(bp, SPACELEFT(buf, bp), " (%d/%d)",
4245                                            (int) ctladdr->q_uid,
4246                                            (int) ctladdr->q_gid);
4247                         bp += strlen(bp);
4248                 }
4249         }
4250
4251         /* delay & xdelay: max 41 bytes */
4252         (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", delay=",
4253                            pintvl(now - e->e_ctime, true));
4254         bp += strlen(bp);
4255
4256         if (xstart != (time_t) 0)
4257         {
4258                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", xdelay=",
4259                                    pintvl(now - xstart, true));
4260                 bp += strlen(bp);
4261         }
4262
4263         /* mailer: assume about 19 bytes (max 10 byte mailer name) */
4264         if (m != NULL)
4265         {
4266                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", mailer=",
4267                                    m->m_name);
4268                 bp += strlen(bp);
4269         }
4270
4271         /* pri: changes with each delivery attempt */
4272         (void) sm_snprintf(bp, SPACELEFT(buf, bp), ", pri=%ld",
4273                 e->e_msgpriority);
4274         bp += strlen(bp);
4275
4276         /* relay: max 66 bytes for IPv4 addresses */
4277         if (mci != NULL && mci->mci_host != NULL)
4278         {
4279                 extern SOCKADDR CurHostAddr;
4280
4281                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", relay=",
4282                                    shortenstring(mci->mci_host, 40));
4283                 bp += strlen(bp);
4284
4285                 if (CurHostAddr.sa.sa_family != 0)
4286                 {
4287                         (void) sm_snprintf(bp, SPACELEFT(buf, bp), " [%s]",
4288                                            anynet_ntoa(&CurHostAddr));
4289                 }
4290         }
4291         else if (strcmp(status, "quarantined") == 0)
4292         {
4293                 if (e->e_quarmsg != NULL)
4294                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4295                                            ", quarantine=%s",
4296                                            shortenstring(e->e_quarmsg, 40));
4297         }
4298         else if (strcmp(status, "queued") != 0)
4299         {
4300                 p = macvalue('h', e);
4301                 if (p != NULL && p[0] != '\0')
4302                 {
4303                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4304                                            ", relay=%s", shortenstring(p, 40));
4305                 }
4306         }
4307         bp += strlen(bp);
4308
4309         /* dsn */
4310         if (dsn != NULL && *dsn != '\0')
4311         {
4312                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", dsn=",
4313                                    shortenstring(dsn, ENHSCLEN));
4314                 bp += strlen(bp);
4315         }
4316
4317 #if _FFR_LOG_NTRIES
4318         /* ntries */
4319         if (e->e_ntries >= 0)
4320         {
4321                 (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4322                                    ", ntries=%d", e->e_ntries + 1);
4323                 bp += strlen(bp);
4324         }
4325 #endif /* _FFR_LOG_NTRIES */
4326
4327 # define STATLEN                (((SYSLOG_BUFSIZE) - 100) / 4)
4328 # if (STATLEN) < 63
4329 #  undef STATLEN
4330 #  define STATLEN       63
4331 # endif /* (STATLEN) < 63 */
4332 # if (STATLEN) > 203
4333 #  undef STATLEN
4334 #  define STATLEN       203
4335 # endif /* (STATLEN) > 203 */
4336
4337         /* stat: max 210 bytes */
4338         if ((bp - buf) > (sizeof(buf) - ((STATLEN) + 20)))
4339         {
4340                 /* desperation move -- truncate data */
4341                 bp = buf + sizeof(buf) - ((STATLEN) + 17);
4342                 (void) sm_strlcpy(bp, "...", SPACELEFT(buf, bp));
4343                 bp += 3;
4344         }
4345
4346         (void) sm_strlcpy(bp, ", stat=", SPACELEFT(buf, bp));
4347         bp += strlen(bp);
4348
4349         (void) sm_strlcpy(bp, shortenstring(status, STATLEN),
4350                           SPACELEFT(buf, bp));
4351
4352         /* id, to: max 13 + TOBUFSIZE bytes */
4353         l = SYSLOG_BUFSIZE - 100 - strlen(buf);
4354         if (l < 0)
4355                 l = 0;
4356         p = e->e_to == NULL ? "NO-TO-LIST" : e->e_to;
4357         while (strlen(p) >= l)
4358         {
4359                 register char *q;
4360
4361                 for (q = p + l; q > p; q--)
4362                 {
4363                         if (*q == ',')
4364                                 break;
4365                 }
4366                 if (p == q)
4367                         break;
4368                 sm_syslog(LOG_INFO, e->e_id, "to=%.*s [more]%s",
4369                           (int) (++q - p), p, buf);
4370                 p = q;
4371         }
4372         sm_syslog(LOG_INFO, e->e_id, "to=%.*s%s", l, p, buf);
4373
4374 #else /* (SYSLOG_BUFSIZE) >= 256 */
4375
4376         l = SYSLOG_BUFSIZE - 85;
4377         if (l < 0)
4378                 l = 0;
4379         p = e->e_to == NULL ? "NO-TO-LIST" : e->e_to;
4380         while (strlen(p) >= l)
4381         {
4382                 register char *q;
4383
4384                 for (q = p + l; q > p; q--)
4385                 {
4386                         if (*q == ',')
4387                                 break;
4388                 }
4389                 if (p == q)
4390                         break;
4391
4392                 sm_syslog(LOG_INFO, e->e_id, "to=%.*s [more]",
4393                           (int) (++q - p), p);
4394                 p = q;
4395         }
4396         sm_syslog(LOG_INFO, e->e_id, "to=%.*s", l, p);
4397
4398         if (ctladdr != NULL)
4399         {
4400                 bp = buf;
4401                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, "ctladdr=",
4402                                    shortenstring(ctladdr->q_paddr, 83));
4403                 bp += strlen(bp);
4404                 if (bitset(QGOODUID, ctladdr->q_flags))
4405                 {
4406                         (void) sm_snprintf(bp, SPACELEFT(buf, bp), " (%d/%d)",
4407                                            ctladdr->q_uid, ctladdr->q_gid);
4408                         bp += strlen(bp);
4409                 }
4410                 sm_syslog(LOG_INFO, e->e_id, "%s", buf);
4411         }
4412         bp = buf;
4413         (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, "delay=",
4414                            pintvl(now - e->e_ctime, true));
4415         bp += strlen(bp);
4416         if (xstart != (time_t) 0)
4417         {
4418                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", xdelay=",
4419                                    pintvl(now - xstart, true));
4420                 bp += strlen(bp);
4421         }
4422
4423         if (m != NULL)
4424         {
4425                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", mailer=",
4426                                    m->m_name);
4427                 bp += strlen(bp);
4428         }
4429         sm_syslog(LOG_INFO, e->e_id, "%.1000s", buf);
4430
4431         buf[0] = '\0';
4432         bp = buf;
4433         if (mci != NULL && mci->mci_host != NULL)
4434         {
4435                 extern SOCKADDR CurHostAddr;
4436
4437                 (void) sm_snprintf(bp, SPACELEFT(buf, bp), "relay=%.100s",
4438                                    mci->mci_host);
4439                 bp += strlen(bp);
4440
4441                 if (CurHostAddr.sa.sa_family != 0)
4442                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4443                                            " [%.100s]",
4444                                            anynet_ntoa(&CurHostAddr));
4445         }
4446         else if (strcmp(status, "quarantined") == 0)
4447         {
4448                 if (e->e_quarmsg != NULL)
4449                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4450                                            ", quarantine=%.100s",
4451                                            e->e_quarmsg);
4452         }
4453         else if (strcmp(status, "queued") != 0)
4454         {
4455                 p = macvalue('h', e);
4456                 if (p != NULL && p[0] != '\0')
4457                         (void) sm_snprintf(buf, sizeof(buf), "relay=%.100s", p);
4458         }
4459         if (buf[0] != '\0')
4460                 sm_syslog(LOG_INFO, e->e_id, "%.1000s", buf);
4461
4462         sm_syslog(LOG_INFO, e->e_id, "stat=%s", shortenstring(status, 63));
4463 #endif /* (SYSLOG_BUFSIZE) >= 256 */
4464 }
4465 /*
4466 **  PUTFROMLINE -- output a UNIX-style from line (or whatever)
4467 **
4468 **      This can be made an arbitrary message separator by changing $l
4469 **
4470 **      One of the ugliest hacks seen by human eyes is contained herein:
4471 **      UUCP wants those stupid "remote from <host>" lines.  Why oh why
4472 **      does a well-meaning programmer such as myself have to deal with
4473 **      this kind of antique garbage????
4474 **
4475 **      Parameters:
4476 **              mci -- the connection information.
4477 **              e -- the envelope.
4478 **
4479 **      Returns:
4480 **              true iff line was written successfully
4481 **
4482 **      Side Effects:
4483 **              outputs some text to fp.
4484 */
4485
4486 bool
4487 putfromline(mci, e)
4488         register MCI *mci;
4489         ENVELOPE *e;
4490 {
4491         char *template = UnixFromLine;
4492         char buf[MAXLINE];
4493         char xbuf[MAXLINE];
4494
4495         if (bitnset(M_NHDR, mci->mci_mailer->m_flags))
4496                 return true;
4497
4498         mci->mci_flags |= MCIF_INHEADER;
4499
4500         if (bitnset(M_UGLYUUCP, mci->mci_mailer->m_flags))
4501         {
4502                 char *bang;
4503
4504                 expand("\201g", buf, sizeof(buf), e);
4505                 bang = strchr(buf, '!');
4506                 if (bang == NULL)
4507                 {
4508                         char *at;
4509                         char hname[MAXNAME];
4510
4511                         /*
4512                         **  If we can construct a UUCP path, do so
4513                         */
4514
4515                         at = strrchr(buf, '@');
4516                         if (at == NULL)
4517                         {
4518                                 expand("\201k", hname, sizeof(hname), e);
4519                                 at = hname;
4520                         }
4521                         else
4522                                 *at++ = '\0';
4523                         (void) sm_snprintf(xbuf, sizeof(xbuf),
4524                                            "From %.800s  \201d remote from %.100s\n",
4525                                            buf, at);
4526                 }
4527                 else
4528                 {
4529                         *bang++ = '\0';
4530                         (void) sm_snprintf(xbuf, sizeof(xbuf),
4531                                            "From %.800s  \201d remote from %.100s\n",
4532                                            bang, buf);
4533                         template = xbuf;
4534                 }
4535         }
4536         expand(template, buf, sizeof(buf), e);
4537         return putxline(buf, strlen(buf), mci, PXLF_HEADER);
4538 }
4539
4540 /*
4541 **  PUTBODY -- put the body of a message.
4542 **
4543 **      Parameters:
4544 **              mci -- the connection information.
4545 **              e -- the envelope to put out.
4546 **              separator -- if non-NULL, a message separator that must
4547 **                      not be permitted in the resulting message.
4548 **
4549 **      Returns:
4550 **              true iff message was written successfully
4551 **
4552 **      Side Effects:
4553 **              The message is written onto fp.
4554 */
4555
4556 /* values for output state variable */
4557 #define OSTATE_HEAD     0       /* at beginning of line */
4558 #define OSTATE_CR       1       /* read a carriage return */
4559 #define OSTATE_INLINE   2       /* putting rest of line */
4560
4561 bool
4562 putbody(mci, e, separator)
4563         register MCI *mci;
4564         register ENVELOPE *e;
4565         char *separator;
4566 {
4567         bool dead = false;
4568         bool ioerr = false;
4569         int save_errno;
4570         char buf[MAXLINE];
4571 #if MIME8TO7
4572         char *boundaries[MAXMIMENESTING + 1];
4573 #endif /* MIME8TO7 */
4574
4575         /*
4576         **  Output the body of the message
4577         */
4578
4579         if (e->e_dfp == NULL && bitset(EF_HAS_DF, e->e_flags))
4580         {
4581                 char *df = queuename(e, DATAFL_LETTER);
4582
4583                 e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, df,
4584                                       SM_IO_RDONLY_B, NULL);
4585                 if (e->e_dfp == NULL)
4586                 {
4587                         char *msg = "!putbody: Cannot open %s for %s from %s";
4588
4589                         if (errno == ENOENT)
4590                                 msg++;
4591                         syserr(msg, df, e->e_to, e->e_from.q_paddr);
4592                 }
4593
4594         }
4595         if (e->e_dfp == NULL)
4596         {
4597                 if (bitset(MCIF_INHEADER, mci->mci_flags))
4598                 {
4599                         if (!putline("", mci))
4600                                 goto writeerr;
4601                         mci->mci_flags &= ~MCIF_INHEADER;
4602                 }
4603                 if (!putline("<<< No Message Collected >>>", mci))
4604                         goto writeerr;
4605                 goto endofmessage;
4606         }
4607
4608         if (e->e_dfino == (ino_t) 0)
4609         {
4610                 struct stat stbuf;
4611
4612                 if (fstat(sm_io_getinfo(e->e_dfp, SM_IO_WHAT_FD, NULL), &stbuf)
4613                     < 0)
4614                         e->e_dfino = -1;
4615                 else
4616                 {
4617                         e->e_dfdev = stbuf.st_dev;
4618                         e->e_dfino = stbuf.st_ino;
4619                 }
4620         }
4621
4622         /* paranoia: the data file should always be in a rewound state */
4623         (void) bfrewind(e->e_dfp);
4624
4625         /* simulate an I/O timeout when used as source */
4626         if (tTd(84, 101))
4627                 sleep(319);
4628
4629 #if MIME8TO7
4630         if (bitset(MCIF_CVT8TO7, mci->mci_flags))
4631         {
4632                 /*
4633                 **  Do 8 to 7 bit MIME conversion.
4634                 */
4635
4636                 /* make sure it looks like a MIME message */
4637                 if (hvalue("MIME-Version", e->e_header) == NULL &&
4638                     !putline("MIME-Version: 1.0", mci))
4639                         goto writeerr;
4640
4641                 if (hvalue("Content-Type", e->e_header) == NULL)
4642                 {
4643                         (void) sm_snprintf(buf, sizeof(buf),
4644                                            "Content-Type: text/plain; charset=%s",
4645                                            defcharset(e));
4646                         if (!putline(buf, mci))
4647                                 goto writeerr;
4648                 }
4649
4650                 /* now do the hard work */
4651                 boundaries[0] = NULL;
4652                 mci->mci_flags |= MCIF_INHEADER;
4653                 if (mime8to7(mci, e->e_header, e, boundaries, M87F_OUTER, 0) ==
4654                                                                 SM_IO_EOF)
4655                         goto writeerr;
4656         }
4657 # if MIME7TO8
4658         else if (bitset(MCIF_CVT7TO8, mci->mci_flags))
4659         {
4660                 if (!mime7to8(mci, e->e_header, e))
4661                         goto writeerr;
4662         }
4663 # endif /* MIME7TO8 */
4664         else if (MaxMimeHeaderLength > 0 || MaxMimeFieldLength > 0)
4665         {
4666                 bool oldsuprerrs = SuprErrs;
4667
4668                 /* Use mime8to7 to check multipart for MIME header overflows */
4669                 boundaries[0] = NULL;
4670                 mci->mci_flags |= MCIF_INHEADER;
4671
4672                 /*
4673                 **  If EF_DONT_MIME is set, we have a broken MIME message
4674                 **  and don't want to generate a new bounce message whose
4675                 **  body propagates the broken MIME.  We can't just not call
4676                 **  mime8to7() as is done above since we need the security
4677                 **  checks.  The best we can do is suppress the errors.
4678                 */
4679
4680                 if (bitset(EF_DONT_MIME, e->e_flags))
4681                         SuprErrs = true;
4682
4683                 if (mime8to7(mci, e->e_header, e, boundaries,
4684                                 M87F_OUTER|M87F_NO8TO7, 0) == SM_IO_EOF)
4685                         goto writeerr;
4686
4687                 /* restore SuprErrs */
4688                 SuprErrs = oldsuprerrs;
4689         }
4690         else
4691 #endif /* MIME8TO7 */
4692         {
4693                 int ostate;
4694                 register char *bp;
4695                 register char *pbp;
4696                 register int c;
4697                 register char *xp;
4698                 int padc;
4699                 char *buflim;
4700                 int pos = 0;
4701                 char peekbuf[12];
4702
4703                 if (bitset(MCIF_INHEADER, mci->mci_flags))
4704                 {
4705                         if (!putline("", mci))
4706                                 goto writeerr;
4707                         mci->mci_flags &= ~MCIF_INHEADER;
4708                 }
4709
4710                 /* determine end of buffer; allow for short mailer lines */
4711                 buflim = &buf[sizeof(buf) - 1];
4712                 if (mci->mci_mailer->m_linelimit > 0 &&
4713                     mci->mci_mailer->m_linelimit < sizeof(buf) - 1)
4714                         buflim = &buf[mci->mci_mailer->m_linelimit - 1];
4715
4716                 /* copy temp file to output with mapping */
4717                 ostate = OSTATE_HEAD;
4718                 bp = buf;
4719                 pbp = peekbuf;
4720                 while (!sm_io_error(mci->mci_out) && !dead)
4721                 {
4722                         if (pbp > peekbuf)
4723                                 c = *--pbp;
4724                         else if ((c = sm_io_getc(e->e_dfp, SM_TIME_DEFAULT))
4725                                  == SM_IO_EOF)
4726                                 break;
4727                         if (bitset(MCIF_7BIT, mci->mci_flags))
4728                                 c &= 0x7f;
4729                         switch (ostate)
4730                         {
4731                           case OSTATE_HEAD:
4732                                 if (c == '\0' &&
4733                                     bitnset(M_NONULLS,
4734                                             mci->mci_mailer->m_flags))
4735                                         break;
4736                                 if (c != '\r' && c != '\n' && bp < buflim)
4737                                 {
4738                                         *bp++ = c;
4739                                         break;
4740                                 }
4741
4742                                 /* check beginning of line for special cases */
4743                                 *bp = '\0';
4744                                 pos = 0;
4745                                 padc = SM_IO_EOF;
4746                                 if (buf[0] == 'F' &&
4747                                     bitnset(M_ESCFROM, mci->mci_mailer->m_flags)
4748                                     && strncmp(buf, "From ", 5) == 0)
4749                                 {
4750                                         padc = '>';
4751                                 }
4752                                 if (buf[0] == '-' && buf[1] == '-' &&
4753                                     separator != NULL)
4754                                 {
4755                                         /* possible separator */
4756                                         int sl = strlen(separator);
4757
4758                                         if (strncmp(&buf[2], separator, sl)
4759                                             == 0)
4760                                                 padc = ' ';
4761                                 }
4762                                 if (buf[0] == '.' &&
4763                                     bitnset(M_XDOT, mci->mci_mailer->m_flags))
4764                                 {
4765                                         padc = '.';
4766                                 }
4767
4768                                 /* now copy out saved line */
4769                                 if (TrafficLogFile != NULL)
4770                                 {
4771                                         (void) sm_io_fprintf(TrafficLogFile,
4772                                                              SM_TIME_DEFAULT,
4773                                                              "%05d >>> ",
4774                                                              (int) CurrentPid);
4775                                         if (padc != SM_IO_EOF)
4776                                                 (void) sm_io_putc(TrafficLogFile,
4777                                                                   SM_TIME_DEFAULT,
4778                                                                   padc);
4779                                         for (xp = buf; xp < bp; xp++)
4780                                                 (void) sm_io_putc(TrafficLogFile,
4781                                                                   SM_TIME_DEFAULT,
4782                                                                   (unsigned char) *xp);
4783                                         if (c == '\n')
4784                                                 (void) sm_io_fputs(TrafficLogFile,
4785                                                                    SM_TIME_DEFAULT,
4786                                                                    mci->mci_mailer->m_eol);
4787                                 }
4788                                 if (padc != SM_IO_EOF)
4789                                 {
4790                                         if (sm_io_putc(mci->mci_out,
4791                                                        SM_TIME_DEFAULT, padc)
4792                                             == SM_IO_EOF)
4793                                         {
4794                                                 dead = true;
4795                                                 continue;
4796                                         }
4797                                         pos++;
4798                                 }
4799                                 for (xp = buf; xp < bp; xp++)
4800                                 {
4801                                         if (sm_io_putc(mci->mci_out,
4802                                                        SM_TIME_DEFAULT,
4803                                                        (unsigned char) *xp)
4804                                             == SM_IO_EOF)
4805                                         {
4806                                                 dead = true;
4807                                                 break;
4808                                         }
4809                                 }
4810                                 if (dead)
4811                                         continue;
4812                                 if (c == '\n')
4813                                 {
4814                                         if (sm_io_fputs(mci->mci_out,
4815                                                         SM_TIME_DEFAULT,
4816                                                         mci->mci_mailer->m_eol)
4817                                                         == SM_IO_EOF)
4818                                                 break;
4819                                         pos = 0;
4820                                 }
4821                                 else
4822                                 {
4823                                         pos += bp - buf;
4824                                         if (c != '\r')
4825                                         {
4826                                                 SM_ASSERT(pbp < peekbuf +
4827                                                                 sizeof(peekbuf));
4828                                                 *pbp++ = c;
4829                                         }
4830                                 }
4831
4832                                 bp = buf;
4833
4834                                 /* determine next state */
4835                                 if (c == '\n')
4836                                         ostate = OSTATE_HEAD;
4837                                 else if (c == '\r')
4838                                         ostate = OSTATE_CR;
4839                                 else
4840                                         ostate = OSTATE_INLINE;
4841                                 continue;
4842
4843                           case OSTATE_CR:
4844                                 if (c == '\n')
4845                                 {
4846                                         /* got CRLF */
4847                                         if (sm_io_fputs(mci->mci_out,
4848                                                         SM_TIME_DEFAULT,
4849                                                         mci->mci_mailer->m_eol)
4850                                                         == SM_IO_EOF)
4851                                                 continue;
4852
4853                                         if (TrafficLogFile != NULL)
4854                                         {
4855                                                 (void) sm_io_fputs(TrafficLogFile,
4856                                                                    SM_TIME_DEFAULT,
4857                                                                    mci->mci_mailer->m_eol);
4858                                         }
4859                                         pos = 0;
4860                                         ostate = OSTATE_HEAD;
4861                                         continue;
4862                                 }
4863
4864                                 /* had a naked carriage return */
4865                                 SM_ASSERT(pbp < peekbuf + sizeof(peekbuf));
4866                                 *pbp++ = c;
4867                                 c = '\r';
4868                                 ostate = OSTATE_INLINE;
4869                                 goto putch;
4870
4871                           case OSTATE_INLINE:
4872                                 if (c == '\r')
4873                                 {
4874                                         ostate = OSTATE_CR;
4875                                         continue;
4876                                 }
4877                                 if (c == '\0' &&
4878                                     bitnset(M_NONULLS,
4879                                             mci->mci_mailer->m_flags))
4880                                         break;
4881 putch:
4882                                 if (mci->mci_mailer->m_linelimit > 0 &&
4883                                     pos >= mci->mci_mailer->m_linelimit - 1 &&
4884                                     c != '\n')
4885                                 {
4886                                         int d;
4887
4888                                         /* check next character for EOL */
4889                                         if (pbp > peekbuf)
4890                                                 d = *(pbp - 1);
4891                                         else if ((d = sm_io_getc(e->e_dfp,
4892                                                                  SM_TIME_DEFAULT))
4893                                                  != SM_IO_EOF)
4894                                         {
4895                                                 SM_ASSERT(pbp < peekbuf +
4896                                                                 sizeof(peekbuf));
4897                                                 *pbp++ = d;
4898                                         }
4899
4900                                         if (d == '\n' || d == SM_IO_EOF)
4901                                         {
4902                                                 if (TrafficLogFile != NULL)
4903                                                         (void) sm_io_putc(TrafficLogFile,
4904                                                                           SM_TIME_DEFAULT,
4905                                                                           (unsigned char) c);
4906                                                 if (sm_io_putc(mci->mci_out,
4907                                                                SM_TIME_DEFAULT,
4908                                                                (unsigned char) c)
4909                                                                == SM_IO_EOF)
4910                                                 {
4911                                                         dead = true;
4912                                                         continue;
4913                                                 }
4914                                                 pos++;
4915                                                 continue;
4916                                         }
4917
4918                                         if (sm_io_putc(mci->mci_out,
4919                                                        SM_TIME_DEFAULT, '!')
4920                                             == SM_IO_EOF ||
4921                                             sm_io_fputs(mci->mci_out,
4922                                                         SM_TIME_DEFAULT,
4923                                                         mci->mci_mailer->m_eol)
4924                                             == SM_IO_EOF)
4925                                         {
4926                                                 dead = true;
4927                                                 continue;
4928                                         }
4929
4930                                         if (TrafficLogFile != NULL)
4931                                         {
4932                                                 (void) sm_io_fprintf(TrafficLogFile,
4933                                                                      SM_TIME_DEFAULT,
4934                                                                      "!%s",
4935                                                                      mci->mci_mailer->m_eol);
4936                                         }
4937                                         ostate = OSTATE_HEAD;
4938                                         SM_ASSERT(pbp < peekbuf +
4939                                                         sizeof(peekbuf));
4940                                         *pbp++ = c;
4941                                         continue;
4942                                 }
4943                                 if (c == '\n')
4944                                 {
4945                                         if (TrafficLogFile != NULL)
4946                                                 (void) sm_io_fputs(TrafficLogFile,
4947                                                                    SM_TIME_DEFAULT,
4948                                                                    mci->mci_mailer->m_eol);
4949                                         if (sm_io_fputs(mci->mci_out,
4950                                                         SM_TIME_DEFAULT,
4951                                                         mci->mci_mailer->m_eol)
4952                                                         == SM_IO_EOF)
4953                                                 continue;
4954                                         pos = 0;
4955                                         ostate = OSTATE_HEAD;
4956                                 }
4957                                 else
4958                                 {
4959                                         if (TrafficLogFile != NULL)
4960                                                 (void) sm_io_putc(TrafficLogFile,
4961                                                                   SM_TIME_DEFAULT,
4962                                                                   (unsigned char) c);
4963                                         if (sm_io_putc(mci->mci_out,
4964                                                        SM_TIME_DEFAULT,
4965                                                        (unsigned char) c)
4966                                             == SM_IO_EOF)
4967                                         {
4968                                                 dead = true;
4969                                                 continue;
4970                                         }
4971                                         pos++;
4972                                         ostate = OSTATE_INLINE;
4973                                 }
4974                                 break;
4975                         }
4976                 }
4977
4978                 /* make sure we are at the beginning of a line */
4979                 if (bp > buf)
4980                 {
4981                         if (TrafficLogFile != NULL)
4982                         {
4983                                 for (xp = buf; xp < bp; xp++)
4984                                         (void) sm_io_putc(TrafficLogFile,
4985                                                           SM_TIME_DEFAULT,
4986                                                           (unsigned char) *xp);
4987                         }
4988                         for (xp = buf; xp < bp; xp++)
4989                         {
4990                                 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT,
4991                                                (unsigned char) *xp)
4992                                     == SM_IO_EOF)
4993                                 {
4994                                         dead = true;
4995                                         break;
4996                                 }
4997                         }
4998                         pos += bp - buf;
4999                 }
5000                 if (!dead && pos > 0)
5001                 {
5002                         if (TrafficLogFile != NULL)
5003                                 (void) sm_io_fputs(TrafficLogFile,
5004                                                    SM_TIME_DEFAULT,
5005                                                    mci->mci_mailer->m_eol);
5006                         if (sm_io_fputs(mci->mci_out, SM_TIME_DEFAULT,
5007                                            mci->mci_mailer->m_eol) == SM_IO_EOF)
5008                                 goto writeerr;
5009                 }
5010         }
5011
5012         if (sm_io_error(e->e_dfp))
5013         {
5014                 syserr("putbody: %s/%cf%s: read error",
5015                        qid_printqueue(e->e_dfqgrp, e->e_dfqdir),
5016                        DATAFL_LETTER, e->e_id);
5017                 ExitStat = EX_IOERR;
5018                 ioerr = true;
5019         }
5020
5021 endofmessage:
5022         /*
5023         **  Since mailfile() uses e_dfp in a child process,
5024         **  the file offset in the stdio library for the
5025         **  parent process will not agree with the in-kernel
5026         **  file offset since the file descriptor is shared
5027         **  between the processes.  Therefore, it is vital
5028         **  that the file always be rewound.  This forces the
5029         **  kernel offset (lseek) and stdio library (ftell)
5030         **  offset to match.
5031         */
5032
5033         save_errno = errno;
5034         if (e->e_dfp != NULL)
5035                 (void) bfrewind(e->e_dfp);
5036
5037         /* some mailers want extra blank line at end of message */
5038         if (!dead && bitnset(M_BLANKEND, mci->mci_mailer->m_flags) &&
5039             buf[0] != '\0' && buf[0] != '\n')
5040         {
5041                 if (!putline("", mci))
5042                         goto writeerr;
5043         }
5044
5045         if (!dead &&
5046             (sm_io_flush(mci->mci_out, SM_TIME_DEFAULT) == SM_IO_EOF ||
5047              (sm_io_error(mci->mci_out) && errno != EPIPE)))
5048         {
5049                 save_errno = errno;
5050                 syserr("putbody: write error");
5051                 ExitStat = EX_IOERR;
5052                 ioerr = true;
5053         }
5054
5055         errno = save_errno;
5056         return !dead && !ioerr;
5057
5058   writeerr:
5059         return false;
5060 }
5061
5062 /*
5063 **  MAILFILE -- Send a message to a file.
5064 **
5065 **      If the file has the set-user-ID/set-group-ID bits set, but NO
5066 **      execute bits, sendmail will try to become the owner of that file
5067 **      rather than the real user.  Obviously, this only works if
5068 **      sendmail runs as root.
5069 **
5070 **      This could be done as a subordinate mailer, except that it
5071 **      is used implicitly to save messages in ~/dead.letter.  We
5072 **      view this as being sufficiently important as to include it
5073 **      here.  For example, if the system is dying, we shouldn't have
5074 **      to create another process plus some pipes to save the message.
5075 **
5076 **      Parameters:
5077 **              filename -- the name of the file to send to.
5078 **              mailer -- mailer definition for recipient -- if NULL,
5079 **                      use FileMailer.
5080 **              ctladdr -- the controlling address header -- includes
5081 **                      the userid/groupid to be when sending.
5082 **              sfflags -- flags for opening.
5083 **              e -- the current envelope.
5084 **
5085 **      Returns:
5086 **              The exit code associated with the operation.
5087 **
5088 **      Side Effects:
5089 **              none.
5090 */
5091
5092 # define RETURN(st)                     exit(st);
5093
5094 static jmp_buf  CtxMailfileTimeout;
5095
5096 int
5097 mailfile(filename, mailer, ctladdr, sfflags, e)
5098         char *volatile filename;
5099         MAILER *volatile mailer;
5100         ADDRESS *ctladdr;
5101         volatile long sfflags;
5102         register ENVELOPE *e;
5103 {
5104         register SM_FILE_T *f;
5105         register pid_t pid = -1;
5106         volatile int mode;
5107         int len;
5108         off_t curoff;
5109         bool suidwarn = geteuid() == 0;
5110         char *p;
5111         char *volatile realfile;
5112         SM_EVENT *ev;
5113         char buf[MAXPATHLEN];
5114         char targetfile[MAXPATHLEN];
5115
5116         if (tTd(11, 1))
5117         {
5118                 sm_dprintf("mailfile %s\n  ctladdr=", filename);
5119                 printaddr(sm_debug_file(), ctladdr, false);
5120         }
5121
5122         if (mailer == NULL)
5123                 mailer = FileMailer;
5124
5125         if (e->e_xfp != NULL)
5126                 (void) sm_io_flush(e->e_xfp, SM_TIME_DEFAULT);
5127
5128         /*
5129         **  Special case /dev/null.  This allows us to restrict file
5130         **  delivery to regular files only.
5131         */
5132
5133         if (sm_path_isdevnull(filename))
5134                 return EX_OK;
5135
5136         /* check for 8-bit available */
5137         if (bitset(EF_HAS8BIT, e->e_flags) &&
5138             bitnset(M_7BITS, mailer->m_flags) &&
5139             (bitset(EF_DONT_MIME, e->e_flags) ||
5140              !(bitset(MM_MIME8BIT, MimeMode) ||
5141                (bitset(EF_IS_MIME, e->e_flags) &&
5142                 bitset(MM_CVTMIME, MimeMode)))))
5143         {
5144                 e->e_status = "5.6.3";
5145                 usrerrenh(e->e_status,
5146                           "554 Cannot send 8-bit data to 7-bit destination");
5147                 errno = 0;
5148                 return EX_DATAERR;
5149         }
5150
5151         /* Find the actual file */
5152         if (SafeFileEnv != NULL && SafeFileEnv[0] != '\0')
5153         {
5154                 len = strlen(SafeFileEnv);
5155
5156                 if (strncmp(SafeFileEnv, filename, len) == 0)
5157                         filename += len;
5158
5159                 if (len + strlen(filename) + 1 >= sizeof(targetfile))
5160                 {
5161                         syserr("mailfile: filename too long (%s/%s)",
5162                                SafeFileEnv, filename);
5163                         return EX_CANTCREAT;
5164                 }
5165                 (void) sm_strlcpy(targetfile, SafeFileEnv, sizeof(targetfile));
5166                 realfile = targetfile + len;
5167                 if (*filename == '/')
5168                         filename++;
5169                 if (*filename != '\0')
5170                 {
5171                         /* paranoia: trailing / should be removed in readcf */
5172                         if (targetfile[len - 1] != '/')
5173                                 (void) sm_strlcat(targetfile,
5174                                                   "/", sizeof(targetfile));
5175                         (void) sm_strlcat(targetfile, filename,
5176                                           sizeof(targetfile));
5177                 }
5178         }
5179         else if (mailer->m_rootdir != NULL)
5180         {
5181                 expand(mailer->m_rootdir, targetfile, sizeof(targetfile), e);
5182                 len = strlen(targetfile);
5183
5184                 if (strncmp(targetfile, filename, len) == 0)
5185                         filename += len;
5186
5187                 if (len + strlen(filename) + 1 >= sizeof(targetfile))
5188                 {
5189                         syserr("mailfile: filename too long (%s/%s)",
5190                                targetfile, filename);
5191                         return EX_CANTCREAT;
5192                 }
5193                 realfile = targetfile + len;
5194                 if (targetfile[len - 1] != '/')
5195                         (void) sm_strlcat(targetfile, "/", sizeof(targetfile));
5196                 if (*filename == '/')
5197                         (void) sm_strlcat(targetfile, filename + 1,
5198                                           sizeof(targetfile));
5199                 else
5200                         (void) sm_strlcat(targetfile, filename,
5201                                           sizeof(targetfile));
5202         }
5203         else
5204         {
5205                 if (sm_strlcpy(targetfile, filename, sizeof(targetfile)) >=
5206                     sizeof(targetfile))
5207                 {
5208                         syserr("mailfile: filename too long (%s)", filename);
5209                         return EX_CANTCREAT;
5210                 }
5211                 realfile = targetfile;
5212         }
5213
5214         /*
5215         **  Fork so we can change permissions here.
5216         **      Note that we MUST use fork, not vfork, because of
5217         **      the complications of calling subroutines, etc.
5218         */
5219
5220
5221         /*
5222         **  Dispose of SIGCHLD signal catchers that may be laying
5223         **  around so that the waitfor() below will get it.
5224         */
5225
5226         (void) sm_signal(SIGCHLD, SIG_DFL);
5227
5228         DOFORK(fork);
5229
5230         if (pid < 0)
5231                 return EX_OSERR;
5232         else if (pid == 0)
5233         {
5234                 /* child -- actually write to file */
5235                 struct stat stb;
5236                 MCI mcibuf;
5237                 int err;
5238                 volatile int oflags = O_WRONLY|O_APPEND;
5239
5240                 /* Reset global flags */
5241                 RestartRequest = NULL;
5242                 RestartWorkGroup = false;
5243                 ShutdownRequest = NULL;
5244                 PendingSignal = 0;
5245                 CurrentPid = getpid();
5246
5247                 if (e->e_lockfp != NULL)
5248                 {
5249                         int fd;
5250
5251                         fd = sm_io_getinfo(e->e_lockfp, SM_IO_WHAT_FD, NULL);
5252                         /* SM_ASSERT(fd >= 0); */
5253                         if (fd >= 0)
5254                                 (void) close(fd);
5255                 }
5256
5257                 (void) sm_signal(SIGINT, SIG_DFL);
5258                 (void) sm_signal(SIGHUP, SIG_DFL);
5259                 (void) sm_signal(SIGTERM, SIG_DFL);
5260                 (void) umask(OldUmask);
5261                 e->e_to = filename;
5262                 ExitStat = EX_OK;
5263
5264                 if (setjmp(CtxMailfileTimeout) != 0)
5265                 {
5266                         RETURN(EX_TEMPFAIL);
5267                 }
5268
5269                 if (TimeOuts.to_fileopen > 0)
5270                         ev = sm_setevent(TimeOuts.to_fileopen, mailfiletimeout,
5271                                          0);
5272                 else
5273                         ev = NULL;
5274
5275                 /* check file mode to see if set-user-ID */
5276                 if (stat(targetfile, &stb) < 0)
5277                         mode = FileMode;
5278                 else
5279                         mode = stb.st_mode;
5280
5281                 /* limit the errors to those actually caused in the child */
5282                 errno = 0;
5283                 ExitStat = EX_OK;
5284
5285                 /* Allow alias expansions to use the S_IS{U,G}ID bits */
5286                 if ((ctladdr != NULL && !bitset(QALIAS, ctladdr->q_flags)) ||
5287                     bitset(SFF_RUNASREALUID, sfflags))
5288                 {
5289                         /* ignore set-user-ID and set-group-ID bits */
5290                         mode &= ~(S_ISGID|S_ISUID);
5291                         if (tTd(11, 20))
5292                                 sm_dprintf("mailfile: ignoring set-user-ID/set-group-ID bits\n");
5293                 }
5294
5295                 /* we have to open the data file BEFORE setuid() */
5296                 if (e->e_dfp == NULL && bitset(EF_HAS_DF, e->e_flags))
5297                 {
5298                         char *df = queuename(e, DATAFL_LETTER);
5299
5300                         e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, df,
5301                                               SM_IO_RDONLY_B, NULL);
5302                         if (e->e_dfp == NULL)
5303                         {
5304                                 syserr("mailfile: Cannot open %s for %s from %s",
5305                                         df, e->e_to, e->e_from.q_paddr);
5306                         }
5307                 }
5308
5309                 /* select a new user to run as */
5310                 if (!bitset(SFF_RUNASREALUID, sfflags))
5311                 {
5312                         if (bitnset(M_SPECIFIC_UID, mailer->m_flags))
5313                         {
5314                                 RealUserName = NULL;
5315                                 if (mailer->m_uid == NO_UID)
5316                                         RealUid = RunAsUid;
5317                                 else
5318                                         RealUid = mailer->m_uid;
5319                                 if (RunAsUid != 0 && RealUid != RunAsUid)
5320                                 {
5321                                         /* Only root can change the uid */
5322                                         syserr("mailfile: insufficient privileges to change uid, RunAsUid=%d, RealUid=%d",
5323                                                 (int) RunAsUid, (int) RealUid);
5324                                         RETURN(EX_TEMPFAIL);
5325                                 }
5326                         }
5327                         else if (bitset(S_ISUID, mode))
5328                         {
5329                                 RealUserName = NULL;
5330                                 RealUid = stb.st_uid;
5331                         }
5332                         else if (ctladdr != NULL && ctladdr->q_uid != 0)
5333                         {
5334                                 if (ctladdr->q_ruser != NULL)
5335                                         RealUserName = ctladdr->q_ruser;
5336                                 else
5337                                         RealUserName = ctladdr->q_user;
5338                                 RealUid = ctladdr->q_uid;
5339                         }
5340                         else if (mailer != NULL && mailer->m_uid != NO_UID)
5341                         {
5342                                 RealUserName = DefUser;
5343                                 RealUid = mailer->m_uid;
5344                         }
5345                         else
5346                         {
5347                                 RealUserName = DefUser;
5348                                 RealUid = DefUid;
5349                         }
5350
5351                         /* select a new group to run as */
5352                         if (bitnset(M_SPECIFIC_UID, mailer->m_flags))
5353                         {
5354                                 if (mailer->m_gid == NO_GID)
5355                                         RealGid = RunAsGid;
5356                                 else
5357                                         RealGid = mailer->m_gid;
5358                                 if (RunAsUid != 0 &&
5359                                     (RealGid != getgid() ||
5360                                      RealGid != getegid()))
5361                                 {
5362                                         /* Only root can change the gid */
5363                                         syserr("mailfile: insufficient privileges to change gid, RealGid=%d, RunAsUid=%d, gid=%d, egid=%d",
5364                                                (int) RealGid, (int) RunAsUid,
5365                                                (int) getgid(), (int) getegid());
5366                                         RETURN(EX_TEMPFAIL);
5367                                 }
5368                         }
5369                         else if (bitset(S_ISGID, mode))
5370                                 RealGid = stb.st_gid;
5371                         else if (ctladdr != NULL &&
5372                                  ctladdr->q_uid == DefUid &&
5373                                  ctladdr->q_gid == 0)
5374                         {
5375                                 /*
5376                                 **  Special case:  This means it is an
5377                                 **  alias and we should act as DefaultUser.
5378                                 **  See alias()'s comments.
5379                                 */
5380
5381                                 RealGid = DefGid;
5382                                 RealUserName = DefUser;
5383                         }
5384                         else if (ctladdr != NULL && ctladdr->q_uid != 0)
5385                                 RealGid = ctladdr->q_gid;
5386                         else if (mailer != NULL && mailer->m_gid != NO_GID)
5387                                 RealGid = mailer->m_gid;
5388                         else
5389                                 RealGid = DefGid;
5390                 }
5391
5392                 /* last ditch */
5393                 if (!bitset(SFF_ROOTOK, sfflags))
5394                 {
5395                         if (RealUid == 0)
5396                                 RealUid = DefUid;
5397                         if (RealGid == 0)
5398                                 RealGid = DefGid;
5399                 }
5400
5401                 /* set group id list (needs /etc/group access) */
5402                 if (RealUserName != NULL && !DontInitGroups)
5403                 {
5404                         if (initgroups(RealUserName, RealGid) == -1 && suidwarn)
5405                         {
5406                                 syserr("mailfile: initgroups(%s, %d) failed",
5407                                         RealUserName, RealGid);
5408                                 RETURN(EX_TEMPFAIL);
5409                         }
5410                 }
5411                 else
5412                 {
5413                         GIDSET_T gidset[1];
5414
5415                         gidset[0] = RealGid;
5416                         if (setgroups(1, gidset) == -1 && suidwarn)
5417                         {
5418                                 syserr("mailfile: setgroups() failed");
5419                                 RETURN(EX_TEMPFAIL);
5420                         }
5421                 }
5422
5423                 /*
5424                 **  If you have a safe environment, go into it.
5425                 */
5426
5427                 if (realfile != targetfile)
5428                 {
5429                         char save;
5430
5431                         save = *realfile;
5432                         *realfile = '\0';
5433                         if (tTd(11, 20))
5434                                 sm_dprintf("mailfile: chroot %s\n", targetfile);
5435                         if (chroot(targetfile) < 0)
5436                         {
5437                                 syserr("mailfile: Cannot chroot(%s)",
5438                                        targetfile);
5439                                 RETURN(EX_CANTCREAT);
5440                         }
5441                         *realfile = save;
5442                 }
5443
5444                 if (tTd(11, 40))
5445                         sm_dprintf("mailfile: deliver to %s\n", realfile);
5446
5447                 if (chdir("/") < 0)
5448                 {
5449                         syserr("mailfile: cannot chdir(/)");
5450                         RETURN(EX_CANTCREAT);
5451                 }
5452
5453                 /* now reset the group and user ids */
5454                 endpwent();
5455                 sm_mbdb_terminate();
5456                 if (setgid(RealGid) < 0 && suidwarn)
5457                 {
5458                         syserr("mailfile: setgid(%ld) failed", (long) RealGid);
5459                         RETURN(EX_TEMPFAIL);
5460                 }
5461                 vendor_set_uid(RealUid);
5462                 if (setuid(RealUid) < 0 && suidwarn)
5463                 {
5464                         syserr("mailfile: setuid(%ld) failed", (long) RealUid);
5465                         RETURN(EX_TEMPFAIL);
5466                 }
5467
5468                 if (tTd(11, 2))
5469                         sm_dprintf("mailfile: running as r/euid=%d/%d, r/egid=%d/%d\n",
5470                                 (int) getuid(), (int) geteuid(),
5471                                 (int) getgid(), (int) getegid());
5472
5473
5474                 /* move into some "safe" directory */
5475                 if (mailer->m_execdir != NULL)
5476                 {
5477                         char *q;
5478
5479                         for (p = mailer->m_execdir; p != NULL; p = q)
5480                         {
5481                                 q = strchr(p, ':');
5482                                 if (q != NULL)
5483                                         *q = '\0';
5484                                 expand(p, buf, sizeof(buf), e);
5485                                 if (q != NULL)
5486                                         *q++ = ':';
5487                                 if (tTd(11, 20))
5488                                         sm_dprintf("mailfile: trydir %s\n",
5489                                                    buf);
5490                                 if (buf[0] != '\0' && chdir(buf) >= 0)
5491                                         break;
5492                         }
5493                 }
5494
5495                 /*
5496                 **  Recheck the file after we have assumed the ID of the
5497                 **  delivery user to make sure we can deliver to it as
5498                 **  that user.  This is necessary if sendmail is running
5499                 **  as root and the file is on an NFS mount which treats
5500                 **  root as nobody.
5501                 */
5502
5503 #if HASLSTAT
5504                 if (bitnset(DBS_FILEDELIVERYTOSYMLINK, DontBlameSendmail))
5505                         err = stat(realfile, &stb);
5506                 else
5507                         err = lstat(realfile, &stb);
5508 #else /* HASLSTAT */
5509                 err = stat(realfile, &stb);
5510 #endif /* HASLSTAT */
5511
5512                 if (err < 0)
5513                 {
5514                         stb.st_mode = ST_MODE_NOFILE;
5515                         mode = FileMode;
5516                         oflags |= O_CREAT|O_EXCL;
5517                 }
5518                 else if (bitset(S_IXUSR|S_IXGRP|S_IXOTH, mode) ||
5519                          (!bitnset(DBS_FILEDELIVERYTOHARDLINK,
5520                                    DontBlameSendmail) &&
5521                           stb.st_nlink != 1) ||
5522                          (realfile != targetfile && !S_ISREG(mode)))
5523                         exit(EX_CANTCREAT);
5524                 else
5525                         mode = stb.st_mode;
5526
5527                 if (!bitnset(DBS_FILEDELIVERYTOSYMLINK, DontBlameSendmail))
5528                         sfflags |= SFF_NOSLINK;
5529                 if (!bitnset(DBS_FILEDELIVERYTOHARDLINK, DontBlameSendmail))
5530                         sfflags |= SFF_NOHLINK;
5531                 sfflags &= ~SFF_OPENASROOT;
5532                 f = safefopen(realfile, oflags, mode, sfflags);
5533                 if (f == NULL)
5534                 {
5535                         if (transienterror(errno))
5536                         {
5537                                 usrerr("454 4.3.0 cannot open %s: %s",
5538                                        shortenstring(realfile, MAXSHORTSTR),
5539                                        sm_errstring(errno));
5540                                 RETURN(EX_TEMPFAIL);
5541                         }
5542                         else
5543                         {
5544                                 usrerr("554 5.3.0 cannot open %s: %s",
5545                                        shortenstring(realfile, MAXSHORTSTR),
5546                                        sm_errstring(errno));
5547                                 RETURN(EX_CANTCREAT);
5548                         }
5549                 }
5550                 if (filechanged(realfile, sm_io_getinfo(f, SM_IO_WHAT_FD, NULL),
5551                     &stb))
5552                 {
5553                         syserr("554 5.3.0 file changed after open");
5554                         RETURN(EX_CANTCREAT);
5555                 }
5556                 if (fstat(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL), &stb) < 0)
5557                 {
5558                         syserr("554 5.3.0 cannot fstat %s",
5559                                 sm_errstring(errno));
5560                         RETURN(EX_CANTCREAT);
5561                 }
5562
5563                 curoff = stb.st_size;
5564
5565                 if (ev != NULL)
5566                         sm_clrevent(ev);
5567
5568                 memset(&mcibuf, '\0', sizeof(mcibuf));
5569                 mcibuf.mci_mailer = mailer;
5570                 mcibuf.mci_out = f;
5571                 if (bitnset(M_7BITS, mailer->m_flags))
5572                         mcibuf.mci_flags |= MCIF_7BIT;
5573
5574                 /* clear out per-message flags from connection structure */
5575                 mcibuf.mci_flags &= ~(MCIF_CVT7TO8|MCIF_CVT8TO7);
5576
5577                 if (bitset(EF_HAS8BIT, e->e_flags) &&
5578                     !bitset(EF_DONT_MIME, e->e_flags) &&
5579                     bitnset(M_7BITS, mailer->m_flags))
5580                         mcibuf.mci_flags |= MCIF_CVT8TO7;
5581
5582 #if MIME7TO8
5583                 if (bitnset(M_MAKE8BIT, mailer->m_flags) &&
5584                     !bitset(MCIF_7BIT, mcibuf.mci_flags) &&
5585                     (p = hvalue("Content-Transfer-Encoding", e->e_header)) != NULL &&
5586                     (sm_strcasecmp(p, "quoted-printable") == 0 ||
5587                      sm_strcasecmp(p, "base64") == 0) &&
5588                     (p = hvalue("Content-Type", e->e_header)) != NULL)
5589                 {
5590                         /* may want to convert 7 -> 8 */
5591                         /* XXX should really parse it here -- and use a class XXX */
5592                         if (sm_strncasecmp(p, "text/plain", 10) == 0 &&
5593                             (p[10] == '\0' || p[10] == ' ' || p[10] == ';'))
5594                                 mcibuf.mci_flags |= MCIF_CVT7TO8;
5595                 }
5596 #endif /* MIME7TO8 */
5597
5598                 if (!putfromline(&mcibuf, e) ||
5599                     !(*e->e_puthdr)(&mcibuf, e->e_header, e, M87F_OUTER) ||
5600                     !(*e->e_putbody)(&mcibuf, e, NULL) ||
5601                     !putline("\n", &mcibuf) ||
5602                     (sm_io_flush(f, SM_TIME_DEFAULT) != 0 ||
5603                     (SuperSafe != SAFE_NO &&
5604                      fsync(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL)) < 0) ||
5605                     sm_io_error(f)))
5606                 {
5607                         setstat(EX_IOERR);
5608 #if !NOFTRUNCATE
5609                         (void) ftruncate(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL),
5610                                          curoff);
5611 #endif /* !NOFTRUNCATE */
5612                 }
5613
5614                 /* reset ISUID & ISGID bits for paranoid systems */
5615 #if HASFCHMOD
5616                 (void) fchmod(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL),
5617                               (MODE_T) mode);
5618 #else /* HASFCHMOD */
5619                 (void) chmod(filename, (MODE_T) mode);
5620 #endif /* HASFCHMOD */
5621                 if (sm_io_close(f, SM_TIME_DEFAULT) < 0)
5622                         setstat(EX_IOERR);
5623                 (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
5624                 (void) setuid(RealUid);
5625                 exit(ExitStat);
5626                 /* NOTREACHED */
5627         }
5628         else
5629         {
5630                 /* parent -- wait for exit status */
5631                 int st;
5632
5633                 st = waitfor(pid);
5634                 if (st == -1)
5635                 {
5636                         syserr("mailfile: %s: wait", mailer->m_name);
5637                         return EX_SOFTWARE;
5638                 }
5639                 if (WIFEXITED(st))
5640                 {
5641                         errno = 0;
5642                         return (WEXITSTATUS(st));
5643                 }
5644                 else
5645                 {
5646                         syserr("mailfile: %s: child died on signal %d",
5647                                mailer->m_name, st);
5648                         return EX_UNAVAILABLE;
5649                 }
5650                 /* NOTREACHED */
5651         }
5652         return EX_UNAVAILABLE;  /* avoid compiler warning on IRIX */
5653 }
5654
5655 static void
5656 mailfiletimeout(ignore)
5657         int ignore;
5658 {
5659         /*
5660         **  NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
5661         **      ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
5662         **      DOING.
5663         */
5664
5665         errno = ETIMEDOUT;
5666         longjmp(CtxMailfileTimeout, 1);
5667 }
5668 /*
5669 **  HOSTSIGNATURE -- return the "signature" for a host.
5670 **
5671 **      The signature describes how we are going to send this -- it
5672 **      can be just the hostname (for non-Internet hosts) or can be
5673 **      an ordered list of MX hosts.
5674 **
5675 **      Parameters:
5676 **              m -- the mailer describing this host.
5677 **              host -- the host name.
5678 **
5679 **      Returns:
5680 **              The signature for this host.
5681 **
5682 **      Side Effects:
5683 **              Can tweak the symbol table.
5684 */
5685
5686 #define MAXHOSTSIGNATURE        8192    /* max len of hostsignature */
5687
5688 char *
5689 hostsignature(m, host)
5690         register MAILER *m;
5691         char *host;
5692 {
5693         register char *p;
5694         register STAB *s;
5695         time_t now;
5696 #if NAMED_BIND
5697         char sep = ':';
5698         char prevsep = ':';
5699         int i;
5700         int len;
5701         int nmx;
5702         int hl;
5703         char *hp;
5704         char *endp;
5705         int oldoptions = _res.options;
5706         char *mxhosts[MAXMXHOSTS + 1];
5707         unsigned short mxprefs[MAXMXHOSTS + 1];
5708 #endif /* NAMED_BIND */
5709
5710         if (tTd(17, 3))
5711                 sm_dprintf("hostsignature(%s)\n", host);
5712
5713         /*
5714         **  If local delivery (and not remote), just return a constant.
5715         */
5716
5717         if (bitnset(M_LOCALMAILER, m->m_flags) &&
5718             strcmp(m->m_mailer, "[IPC]") != 0 &&
5719             !(m->m_argv[0] != NULL && strcmp(m->m_argv[0], "TCP") == 0))
5720                 return "localhost";
5721
5722         /* an empty host does not have MX records */
5723         if (*host == '\0')
5724                 return "_empty_";
5725
5726         /*
5727         **  Check to see if this uses IPC -- if not, it can't have MX records.
5728         */
5729
5730         if (strcmp(m->m_mailer, "[IPC]") != 0 ||
5731             CurEnv->e_sendmode == SM_DEFER)
5732         {
5733                 /* just an ordinary mailer or deferred mode */
5734                 return host;
5735         }
5736 #if NETUNIX
5737         else if (m->m_argv[0] != NULL &&
5738                  strcmp(m->m_argv[0], "FILE") == 0)
5739         {
5740                 /* rendezvous in the file system, no MX records */
5741                 return host;
5742         }
5743 #endif /* NETUNIX */
5744
5745         /*
5746         **  Look it up in the symbol table.
5747         */
5748
5749         now = curtime();
5750         s = stab(host, ST_HOSTSIG, ST_ENTER);
5751         if (s->s_hostsig.hs_sig != NULL)
5752         {
5753                 if (s->s_hostsig.hs_exp >= now)
5754                 {
5755                         if (tTd(17, 3))
5756                                 sm_dprintf("hostsignature(): stab(%s) found %s\n", host,
5757                                            s->s_hostsig.hs_sig);
5758                         return s->s_hostsig.hs_sig;
5759                 }
5760
5761                 /* signature is expired: clear it */
5762                 sm_free(s->s_hostsig.hs_sig);
5763                 s->s_hostsig.hs_sig = NULL;
5764         }
5765
5766         /* set default TTL */
5767         s->s_hostsig.hs_exp = now + SM_DEFAULT_TTL;
5768
5769         /*
5770         **  Not already there or expired -- create a signature.
5771         */
5772
5773 #if NAMED_BIND
5774         if (ConfigLevel < 2)
5775                 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH);   /* XXX */
5776
5777         for (hp = host; hp != NULL; hp = endp)
5778         {
5779 #if NETINET6
5780                 if (*hp == '[')
5781                 {
5782                         endp = strchr(hp + 1, ']');
5783                         if (endp != NULL)
5784                                 endp = strpbrk(endp + 1, ":,");
5785                 }
5786                 else
5787                         endp = strpbrk(hp, ":,");
5788 #else /* NETINET6 */
5789                 endp = strpbrk(hp, ":,");
5790 #endif /* NETINET6 */
5791                 if (endp != NULL)
5792                 {
5793                         sep = *endp;
5794                         *endp = '\0';
5795                 }
5796
5797                 if (bitnset(M_NOMX, m->m_flags))
5798                 {
5799                         /* skip MX lookups */
5800                         nmx = 1;
5801                         mxhosts[0] = hp;
5802                 }
5803                 else
5804                 {
5805                         auto int rcode;
5806                         int ttl;
5807
5808                         nmx = getmxrr(hp, mxhosts, mxprefs, true, &rcode, true,
5809                                       &ttl);
5810                         if (nmx <= 0)
5811                         {
5812                                 int save_errno;
5813                                 register MCI *mci;
5814
5815                                 /* update the connection info for this host */
5816                                 save_errno = errno;
5817                                 mci = mci_get(hp, m);
5818                                 mci->mci_errno = save_errno;
5819                                 mci->mci_herrno = h_errno;
5820                                 mci->mci_lastuse = now;
5821                                 if (rcode == EX_NOHOST)
5822                                         mci_setstat(mci, rcode, "5.1.2",
5823                                                     "550 Host unknown");
5824                                 else
5825                                         mci_setstat(mci, rcode, NULL, NULL);
5826
5827                                 /* use the original host name as signature */
5828                                 nmx = 1;
5829                                 mxhosts[0] = hp;
5830                         }
5831                         if (tTd(17, 3))
5832                                 sm_dprintf("hostsignature(): getmxrr() returned %d, mxhosts[0]=%s\n",
5833                                            nmx, mxhosts[0]);
5834
5835                         /*
5836                         **  Set new TTL: we use only one!
5837                         **      We could try to use the minimum instead.
5838                         */
5839
5840                         s->s_hostsig.hs_exp = now + SM_MIN(ttl, SM_DEFAULT_TTL);
5841                 }
5842
5843                 len = 0;
5844                 for (i = 0; i < nmx; i++)
5845                         len += strlen(mxhosts[i]) + 1;
5846                 if (s->s_hostsig.hs_sig != NULL)
5847                         len += strlen(s->s_hostsig.hs_sig) + 1;
5848                 if (len < 0 || len >= MAXHOSTSIGNATURE)
5849                 {
5850                         sm_syslog(LOG_WARNING, NOQID, "hostsignature for host '%s' exceeds maxlen (%d): %d",
5851                                   host, MAXHOSTSIGNATURE, len);
5852                         len = MAXHOSTSIGNATURE;
5853                 }
5854                 p = sm_pmalloc_x(len);
5855                 if (s->s_hostsig.hs_sig != NULL)
5856                 {
5857                         (void) sm_strlcpy(p, s->s_hostsig.hs_sig, len);
5858                         sm_free(s->s_hostsig.hs_sig); /* XXX */
5859                         s->s_hostsig.hs_sig = p;
5860                         hl = strlen(p);
5861                         p += hl;
5862                         *p++ = prevsep;
5863                         len -= hl + 1;
5864                 }
5865                 else
5866                         s->s_hostsig.hs_sig = p;
5867                 for (i = 0; i < nmx; i++)
5868                 {
5869                         hl = strlen(mxhosts[i]);
5870                         if (len - 1 < hl || len <= 1)
5871                         {
5872                                 /* force to drop out of outer loop */
5873                                 len = -1;
5874                                 break;
5875                         }
5876                         if (i != 0)
5877                         {
5878                                 if (mxprefs[i] == mxprefs[i - 1])
5879                                         *p++ = ',';
5880                                 else
5881                                         *p++ = ':';
5882                                 len--;
5883                         }
5884                         (void) sm_strlcpy(p, mxhosts[i], len);
5885                         p += hl;
5886                         len -= hl;
5887                 }
5888
5889                 /*
5890                 **  break out of loop if len exceeded MAXHOSTSIGNATURE
5891                 **  because we won't have more space for further hosts
5892                 **  anyway (separated by : in the .cf file).
5893                 */
5894
5895                 if (len < 0)
5896                         break;
5897                 if (endp != NULL)
5898                         *endp++ = sep;
5899                 prevsep = sep;
5900         }
5901         makelower(s->s_hostsig.hs_sig);
5902         if (ConfigLevel < 2)
5903                 _res.options = oldoptions;
5904 #else /* NAMED_BIND */
5905         /* not using BIND -- the signature is just the host name */
5906         /*
5907         **  'host' points to storage that will be freed after we are
5908         **  done processing the current envelope, so we copy it.
5909         */
5910         s->s_hostsig.hs_sig = sm_pstrdup_x(host);
5911 #endif /* NAMED_BIND */
5912         if (tTd(17, 1))
5913                 sm_dprintf("hostsignature(%s) = %s\n", host, s->s_hostsig.hs_sig);
5914         return s->s_hostsig.hs_sig;
5915 }
5916 /*
5917 **  PARSE_HOSTSIGNATURE -- parse the "signature" and return MX host array.
5918 **
5919 **      The signature describes how we are going to send this -- it
5920 **      can be just the hostname (for non-Internet hosts) or can be
5921 **      an ordered list of MX hosts which must be randomized for equal
5922 **      MX preference values.
5923 **
5924 **      Parameters:
5925 **              sig -- the host signature.
5926 **              mxhosts -- array to populate.
5927 **              mailer -- mailer.
5928 **
5929 **      Returns:
5930 **              The number of hosts inserted into mxhosts array.
5931 **
5932 **      Side Effects:
5933 **              Randomizes equal MX preference hosts in mxhosts.
5934 */
5935
5936 static int
5937 parse_hostsignature(sig, mxhosts, mailer)
5938         char *sig;
5939         char **mxhosts;
5940         MAILER *mailer;
5941 {
5942         unsigned short curpref = 0;
5943         int nmx = 0, i, j;      /* NOTE: i, j, and nmx must have same type */
5944         char *hp, *endp;
5945         unsigned short prefer[MAXMXHOSTS];
5946         long rndm[MAXMXHOSTS];
5947
5948         for (hp = sig; hp != NULL; hp = endp)
5949         {
5950                 char sep = ':';
5951
5952 #if NETINET6
5953                 if (*hp == '[')
5954                 {
5955                         endp = strchr(hp + 1, ']');
5956                         if (endp != NULL)
5957                                 endp = strpbrk(endp + 1, ":,");
5958                 }
5959                 else
5960                         endp = strpbrk(hp, ":,");
5961 #else /* NETINET6 */
5962                 endp = strpbrk(hp, ":,");
5963 #endif /* NETINET6 */
5964                 if (endp != NULL)
5965                 {
5966                         sep = *endp;
5967                         *endp = '\0';
5968                 }
5969
5970                 mxhosts[nmx] = hp;
5971                 prefer[nmx] = curpref;
5972                 if (mci_match(hp, mailer))
5973                         rndm[nmx] = 0;
5974                 else
5975                         rndm[nmx] = get_random();
5976
5977                 if (endp != NULL)
5978                 {
5979                         /*
5980                         **  Since we don't have the original MX prefs,
5981                         **  make our own.  If the separator is a ':', that
5982                         **  means the preference for the next host will be
5983                         **  higher than this one, so simply increment curpref.
5984                         */
5985
5986                         if (sep == ':')
5987                                 curpref++;
5988
5989                         *endp++ = sep;
5990                 }
5991                 if (++nmx >= MAXMXHOSTS)
5992                         break;
5993         }
5994
5995         /* sort the records using the random factor for equal preferences */
5996         for (i = 0; i < nmx; i++)
5997         {
5998                 for (j = i + 1; j < nmx; j++)
5999                 {
6000                         /*
6001                         **  List is already sorted by MX preference, only
6002                         **  need to look for equal preference MX records
6003                         */
6004
6005                         if (prefer[i] < prefer[j])
6006                                 break;
6007
6008                         if (prefer[i] > prefer[j] ||
6009                             (prefer[i] == prefer[j] && rndm[i] > rndm[j]))
6010                         {
6011                                 register unsigned short tempp;
6012                                 register long tempr;
6013                                 register char *temp1;
6014
6015                                 tempp = prefer[i];
6016                                 prefer[i] = prefer[j];
6017                                 prefer[j] = tempp;
6018                                 temp1 = mxhosts[i];
6019                                 mxhosts[i] = mxhosts[j];
6020                                 mxhosts[j] = temp1;
6021                                 tempr = rndm[i];
6022                                 rndm[i] = rndm[j];
6023                                 rndm[j] = tempr;
6024                         }
6025                 }
6026         }
6027         return nmx;
6028 }
6029
6030 # if STARTTLS
6031 static SSL_CTX  *clt_ctx = NULL;
6032 static bool     tls_ok_clt = true;
6033
6034 /*
6035 **  SETCLTTLS -- client side TLS: allow/disallow.
6036 **
6037 **      Parameters:
6038 **              tls_ok -- should tls be done?
6039 **
6040 **      Returns:
6041 **              none.
6042 **
6043 **      Side Effects:
6044 **              sets tls_ok_clt (static variable in this module)
6045 */
6046
6047 void
6048 setclttls(tls_ok)
6049         bool tls_ok;
6050 {
6051         tls_ok_clt = tls_ok;
6052         return;
6053 }
6054 /*
6055 **  INITCLTTLS -- initialize client side TLS
6056 **
6057 **      Parameters:
6058 **              tls_ok -- should tls initialization be done?
6059 **
6060 **      Returns:
6061 **              succeeded?
6062 **
6063 **      Side Effects:
6064 **              sets tls_ok_clt (static variable in this module)
6065 */
6066
6067 bool
6068 initclttls(tls_ok)
6069         bool tls_ok;
6070 {
6071         if (!tls_ok_clt)
6072                 return false;
6073         tls_ok_clt = tls_ok;
6074         if (!tls_ok_clt)
6075                 return false;
6076         if (clt_ctx != NULL)
6077                 return true;    /* already done */
6078         tls_ok_clt = inittls(&clt_ctx, TLS_I_CLT, Clt_SSL_Options, false,
6079                              CltCertFile, CltKeyFile,
6080                              CACertPath, CACertFile, DHParams);
6081         return tls_ok_clt;
6082 }
6083
6084 /*
6085 **  STARTTLS -- try to start secure connection (client side)
6086 **
6087 **      Parameters:
6088 **              m -- the mailer.
6089 **              mci -- the mailer connection info.
6090 **              e -- the envelope.
6091 **
6092 **      Returns:
6093 **              success?
6094 **              (maybe this should be some other code than EX_
6095 **              that denotes which stage failed.)
6096 */
6097
6098 static int
6099 starttls(m, mci, e)
6100         MAILER *m;
6101         MCI *mci;
6102         ENVELOPE *e;
6103 {
6104         int smtpresult;
6105         int result = 0;
6106         int rfd, wfd;
6107         SSL *clt_ssl = NULL;
6108         time_t tlsstart;
6109
6110         if (clt_ctx == NULL && !initclttls(true))
6111                 return EX_TEMPFAIL;
6112
6113 # if USE_OPENSSL_ENGINE
6114         if (!SSL_set_engine(NULL))
6115         {
6116                 sm_syslog(LOG_ERR, NOQID,
6117                           "STARTTLS=client, SSL_set_engine=failed");
6118                 return EX_TEMPFAIL;
6119         }
6120 # endif /* USE_OPENSSL_ENGINE */
6121
6122         smtpmessage("STARTTLS", m, mci);
6123
6124         /* get the reply */
6125         smtpresult = reply(m, mci, e, TimeOuts.to_starttls, NULL, NULL,
6126                         XS_STARTTLS);
6127
6128         /* check return code from server */
6129         if (REPLYTYPE(smtpresult) == 4)
6130                 return EX_TEMPFAIL;
6131         if (smtpresult == 501)
6132                 return EX_USAGE;
6133         if (smtpresult == -1)
6134                 return smtpresult;
6135
6136         /* not an expected reply but we have to deal with it */
6137         if (REPLYTYPE(smtpresult) == 5)
6138                 return EX_UNAVAILABLE;
6139         if (smtpresult != 220)
6140                 return EX_PROTOCOL;
6141
6142         if (LogLevel > 13)
6143                 sm_syslog(LOG_INFO, NOQID, "STARTTLS=client, start=ok");
6144
6145         /* start connection */
6146         if ((clt_ssl = SSL_new(clt_ctx)) == NULL)
6147         {
6148                 if (LogLevel > 5)
6149                 {
6150                         sm_syslog(LOG_ERR, NOQID,
6151                                   "STARTTLS=client, error: SSL_new failed");
6152                         if (LogLevel > 9)
6153                                 tlslogerr("client");
6154                 }
6155                 return EX_SOFTWARE;
6156         }
6157
6158         rfd = sm_io_getinfo(mci->mci_in, SM_IO_WHAT_FD, NULL);
6159         wfd = sm_io_getinfo(mci->mci_out, SM_IO_WHAT_FD, NULL);
6160
6161         /* SSL_clear(clt_ssl); ? */
6162         if (rfd < 0 || wfd < 0 ||
6163             (result = SSL_set_rfd(clt_ssl, rfd)) != 1 ||
6164             (result = SSL_set_wfd(clt_ssl, wfd)) != 1)
6165         {
6166                 if (LogLevel > 5)
6167                 {
6168                         sm_syslog(LOG_ERR, NOQID,
6169                                   "STARTTLS=client, error: SSL_set_xfd failed=%d",
6170                                   result);
6171                         if (LogLevel > 9)
6172                                 tlslogerr("client");
6173                 }
6174                 return EX_SOFTWARE;
6175         }
6176         SSL_set_connect_state(clt_ssl);
6177         tlsstart = curtime();
6178
6179 ssl_retry:
6180         if ((result = SSL_connect(clt_ssl)) <= 0)
6181         {
6182                 int i, ssl_err;
6183
6184                 ssl_err = SSL_get_error(clt_ssl, result);
6185                 i = tls_retry(clt_ssl, rfd, wfd, tlsstart,
6186                         TimeOuts.to_starttls, ssl_err, "client");
6187                 if (i > 0)
6188                         goto ssl_retry;
6189
6190                 if (LogLevel > 5)
6191                 {
6192                         sm_syslog(LOG_WARNING, NOQID,
6193                                   "STARTTLS=client, error: connect failed=%d, SSL_error=%d, errno=%d, retry=%d",
6194                                   result, ssl_err, errno, i);
6195                         if (LogLevel > 8)
6196                                 tlslogerr("client");
6197                 }
6198
6199                 SSL_free(clt_ssl);
6200                 clt_ssl = NULL;
6201                 return EX_SOFTWARE;
6202         }
6203         mci->mci_ssl = clt_ssl;
6204         result = tls_get_info(mci->mci_ssl, false, mci->mci_host,
6205                               &mci->mci_macro, true);
6206
6207         /* switch to use TLS... */
6208         if (sfdctls(&mci->mci_in, &mci->mci_out, mci->mci_ssl) == 0)
6209                 return EX_OK;
6210
6211         /* failure */
6212         SSL_free(clt_ssl);
6213         clt_ssl = NULL;
6214         return EX_SOFTWARE;
6215 }
6216 /*
6217 **  ENDTLSCLT -- shutdown secure connection (client side)
6218 **
6219 **      Parameters:
6220 **              mci -- the mailer connection info.
6221 **
6222 **      Returns:
6223 **              success?
6224 */
6225
6226 static int
6227 endtlsclt(mci)
6228         MCI *mci;
6229 {
6230         int r;
6231
6232         if (!bitset(MCIF_TLSACT, mci->mci_flags))
6233                 return EX_OK;
6234         r = endtls(mci->mci_ssl, "client");
6235         mci->mci_flags &= ~MCIF_TLSACT;
6236         return r;
6237 }
6238 # endif /* STARTTLS */
6239 # if STARTTLS || SASL
6240 /*
6241 **  ISCLTFLGSET -- check whether client flag is set.
6242 **
6243 **      Parameters:
6244 **              e -- envelope.
6245 **              flag -- flag to check in {client_flags}
6246 **
6247 **      Returns:
6248 **              true iff flag is set.
6249 */
6250
6251 static bool
6252 iscltflgset(e, flag)
6253         ENVELOPE *e;
6254         int flag;
6255 {
6256         char *p;
6257
6258         p = macvalue(macid("{client_flags}"), e);
6259         if (p == NULL)
6260                 return false;
6261         for (; *p != '\0'; p++)
6262         {
6263                 /* look for just this one flag */
6264                 if (*p == (char) flag)
6265                         return true;
6266         }
6267         return false;
6268 }
6269 # endif /* STARTTLS || SASL */