contrib/sendmail-8.14/sendmail/deliver.c

   1 /*
   2  * Copyright (c) 1998-2007 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 8.1012 2007/03/29 21:20:15 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-queuing\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                 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                         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                         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                         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         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                 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) > MAXSHORTSTR)
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 negotation 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 negotation 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
3297                 /*
3298                 **  Ignore an I/O error that was caused by EPIPE.
3299                 **  Some broken mailers don't read the entire body
3300                 **  but just exit() thus causing an I/O error.
3301                 */
3302
3303                 if (!ok && (sm_io_error(mci->mci_out) && errno == EPIPE))
3304                         ok = true;
3305
3306                 /* (always) get the exit status */
3307                 rcode = endmailer(mci, e, pv);
3308                 if (!ok)
3309                         rcode = EX_TEMPFAIL;
3310                 if (rcode == EX_TEMPFAIL && SmtpError[0] == '\0')
3311                 {
3312                         /*
3313                         **  Need an e_message for mailq display.
3314                         **  We set SmtpError as
3315                         */
3316
3317                         (void) sm_snprintf(SmtpError, sizeof(SmtpError),
3318                                            "%s mailer (%s) exited with EX_TEMPFAIL",
3319                                            m->m_name, m->m_mailer);
3320                 }
3321         }
3322         else
3323         {
3324                 /*
3325                 **  Send the MAIL FROM: protocol
3326                 */
3327
3328                 /* XXX this isn't pipelined... */
3329                 rcode = smtpmailfrom(m, mci, e);
3330                 if (rcode == EX_OK)
3331                 {
3332                         register int i;
3333 # if PIPELINING
3334                         ADDRESS *volatile pchain;
3335 # endif /* PIPELINING */
3336
3337                         /* send the recipient list */
3338                         tobuf[0] = '\0';
3339                         mci->mci_retryrcpt = false;
3340                         mci->mci_tolist = tobuf;
3341 # if PIPELINING
3342                         pchain = NULL;
3343                         mci->mci_nextaddr = NULL;
3344 # endif /* PIPELINING */
3345
3346                         for (to = tochain; to != NULL; to = to->q_tchain)
3347                         {
3348                                 if (!QS_IS_UNMARKED(to->q_state))
3349                                         continue;
3350
3351                                 /* mark recipient state as "ok so far" */
3352                                 to->q_state = QS_OK;
3353                                 e->e_to = to->q_paddr;
3354 # if STARTTLS
3355                                 i = rscheck("tls_rcpt", to->q_user, NULL, e,
3356                                             RSF_RMCOMM|RSF_COUNT, 3,
3357                                             mci->mci_host, e->e_id, NULL);
3358                                 if (i != EX_OK)
3359                                 {
3360                                         markfailure(e, to, mci, i, false);
3361                                         giveresponse(i, to->q_status,  m, mci,
3362                                                      ctladdr, xstart, e, to);
3363                                         if (i == EX_TEMPFAIL)
3364                                         {
3365                                                 mci->mci_retryrcpt = true;
3366                                                 to->q_state = QS_RETRY;
3367                                         }
3368                                         continue;
3369                                 }
3370 # endif /* STARTTLS */
3371
3372                                 i = smtprcpt(to, m, mci, e, ctladdr, xstart);
3373 # if PIPELINING
3374                                 if (i == EX_OK &&
3375                                     bitset(MCIF_PIPELINED, mci->mci_flags))
3376                                 {
3377                                         /*
3378                                         **  Add new element to list of
3379                                         **  recipients for pipelining.
3380                                         */
3381
3382                                         to->q_pchain = NULL;
3383                                         if (mci->mci_nextaddr == NULL)
3384                                                 mci->mci_nextaddr = to;
3385                                         if (pchain == NULL)
3386                                                 pchain = to;
3387                                         else
3388                                         {
3389                                                 pchain->q_pchain = to;
3390                                                 pchain = pchain->q_pchain;
3391                                         }
3392                                 }
3393 # endif /* PIPELINING */
3394                                 if (i != EX_OK)
3395                                 {
3396                                         markfailure(e, to, mci, i, false);
3397                                         giveresponse(i, to->q_status, m, mci,
3398                                                      ctladdr, xstart, e, to);
3399                                         if (i == EX_TEMPFAIL)
3400                                                 to->q_state = QS_RETRY;
3401                                 }
3402                         }
3403
3404                         /* No recipients in list and no missing responses? */
3405                         if (tobuf[0] == '\0'
3406 # if PIPELINING
3407                             && mci->mci_nextaddr == NULL
3408 # endif /* PIPELINING */
3409                            )
3410                         {
3411                                 rcode = EX_OK;
3412                                 e->e_to = NULL;
3413                                 if (bitset(MCIF_CACHED, mci->mci_flags))
3414                                         smtprset(m, mci, e);
3415                         }
3416                         else
3417                         {
3418                                 e->e_to = tobuf + 1;
3419                                 rcode = smtpdata(m, mci, e, ctladdr, xstart);
3420                         }
3421                 }
3422                 if (rcode == EX_TEMPFAIL && nummxhosts > hostnum)
3423                 {
3424                         /* try next MX site */
3425                         goto tryhost;
3426                 }
3427         }
3428 #if NAMED_BIND
3429         if (ConfigLevel < 2)
3430                 _res.options |= RES_DEFNAMES | RES_DNSRCH;      /* XXX */
3431 #endif /* NAMED_BIND */
3432
3433         if (tTd(62, 1))
3434                 checkfds("after delivery");
3435
3436         /*
3437         **  Do final status disposal.
3438         **      We check for something in tobuf for the SMTP case.
3439         **      If we got a temporary failure, arrange to queue the
3440         **              addressees.
3441         */
3442
3443   give_up:
3444         if (bitnset(M_LMTP, m->m_flags))
3445         {
3446                 lmtp_rcode = rcode;
3447                 tobuf[0] = '\0';
3448                 anyok = false;
3449                 strsize = 0;
3450         }
3451         else
3452                 anyok = rcode == EX_OK;
3453
3454         for (to = tochain; to != NULL; to = to->q_tchain)
3455         {
3456                 /* see if address already marked */
3457                 if (!QS_IS_OK(to->q_state))
3458                         continue;
3459
3460                 /* if running LMTP, get the status for each address */
3461                 if (bitnset(M_LMTP, m->m_flags))
3462                 {
3463                         if (lmtp_rcode == EX_OK)
3464                                 rcode = smtpgetstat(m, mci, e);
3465                         if (rcode == EX_OK)
3466                         {
3467                                 strsize += sm_strlcat2(tobuf + strsize, ",",
3468                                                 to->q_paddr,
3469                                                 tobufsize - strsize);
3470                                 SM_ASSERT(strsize < tobufsize);
3471                                 anyok = true;
3472                         }
3473                         else
3474                         {
3475                                 e->e_to = to->q_paddr;
3476                                 markfailure(e, to, mci, rcode, true);
3477                                 giveresponse(rcode, to->q_status, m, mci,
3478                                              ctladdr, xstart, e, to);
3479                                 e->e_to = tobuf + 1;
3480                                 continue;
3481                         }
3482                 }
3483                 else
3484                 {
3485                         /* mark bad addresses */
3486                         if (rcode != EX_OK)
3487                         {
3488                                 if (goodmxfound && rcode == EX_NOHOST)
3489                                         rcode = EX_TEMPFAIL;
3490                                 markfailure(e, to, mci, rcode, true);
3491                                 continue;
3492                         }
3493                 }
3494
3495                 /* successful delivery */
3496                 to->q_state = QS_SENT;
3497                 to->q_statdate = curtime();
3498                 e->e_nsent++;
3499
3500                 /*
3501                 **  Checkpoint the send list every few addresses
3502                 */
3503
3504                 if (CheckpointInterval > 0 && e->e_nsent >= CheckpointInterval)
3505                 {
3506                         queueup(e, false, false);
3507                         e->e_nsent = 0;
3508                 }
3509
3510                 if (bitnset(M_LOCALMAILER, m->m_flags) &&
3511                     bitset(QPINGONSUCCESS, to->q_flags))
3512                 {
3513                         to->q_flags |= QDELIVERED;
3514                         to->q_status = "2.1.5";
3515                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3516                                              "%s... Successfully delivered\n",
3517                                              to->q_paddr);
3518                 }
3519                 else if (bitset(QPINGONSUCCESS, to->q_flags) &&
3520                          bitset(QPRIMARY, to->q_flags) &&
3521                          !bitset(MCIF_DSN, mci->mci_flags))
3522                 {
3523                         to->q_flags |= QRELAYED;
3524                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3525                                              "%s... relayed; expect no further notifications\n",
3526                                              to->q_paddr);
3527                 }
3528                 else if (IS_DLVR_NOTIFY(e) &&
3529                          !bitset(MCIF_DLVR_BY, mci->mci_flags) &&
3530                          bitset(QPRIMARY, to->q_flags) &&
3531                          (!bitset(QHASNOTIFY, to->q_flags) ||
3532                           bitset(QPINGONSUCCESS, to->q_flags) ||
3533                           bitset(QPINGONFAILURE, to->q_flags) ||
3534                           bitset(QPINGONDELAY, to->q_flags)))
3535                 {
3536                         /* RFC 2852, 4.1.4.2: no NOTIFY, or not NEVER */
3537                         to->q_flags |= QBYNRELAY;
3538                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3539                                              "%s... Deliver-by notify: relayed\n",
3540                                              to->q_paddr);
3541                 }
3542                 else if (IS_DLVR_TRACE(e) &&
3543                          (!bitset(QHASNOTIFY, to->q_flags) ||
3544                           bitset(QPINGONSUCCESS, to->q_flags) ||
3545                           bitset(QPINGONFAILURE, to->q_flags) ||
3546                           bitset(QPINGONDELAY, to->q_flags)) &&
3547                          bitset(QPRIMARY, to->q_flags))
3548                 {
3549                         /* RFC 2852, 4.1.4: no NOTIFY, or not NEVER */
3550                         to->q_flags |= QBYTRACE;
3551                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3552                                              "%s... Deliver-By trace: relayed\n",
3553                                              to->q_paddr);
3554                 }
3555         }
3556
3557         if (bitnset(M_LMTP, m->m_flags))
3558         {
3559                 /*
3560                 **  Global information applies to the last recipient only;
3561                 **  clear it out to avoid bogus errors.
3562                 */
3563
3564                 rcode = EX_OK;
3565                 e->e_statmsg = NULL;
3566
3567                 /* reset the mci state for the next transaction */
3568                 if (mci != NULL &&
3569                     (mci->mci_state == MCIS_MAIL ||
3570                      mci->mci_state == MCIS_RCPT ||
3571                      mci->mci_state == MCIS_DATA))
3572                 {
3573                         mci->mci_state = MCIS_OPEN;
3574                         SmtpPhase = mci->mci_phase = "idle";
3575                         sm_setproctitle(true, e, "%s: %s", CurHostName,
3576                                         mci->mci_phase);
3577                 }
3578         }
3579
3580         if (tobuf[0] != '\0')
3581         {
3582                 giveresponse(rcode, NULL, m, mci, ctladdr, xstart, e, tochain);
3583 #if 0
3584                 /*
3585                 **  This code is disabled for now because I am not
3586                 **  sure that copying status from the first recipient
3587                 **  to all non-status'ed recipients is a good idea.
3588                 */
3589
3590                 if (tochain->q_message != NULL &&
3591                     !bitnset(M_LMTP, m->m_flags) && rcode != EX_OK)
3592                 {
3593                         for (to = tochain->q_tchain; to != NULL;
3594                              to = to->q_tchain)
3595                         {
3596                                 /* see if address already marked */
3597                                 if (QS_IS_QUEUEUP(to->q_state) &&
3598                                     to->q_message == NULL)
3599                                         to->q_message = sm_rpool_strdup_x(e->e_rpool,
3600                                                         tochain->q_message);
3601                         }
3602                 }
3603 #endif /* 0 */
3604         }
3605         if (anyok)
3606                 markstats(e, tochain, STATS_NORMAL);
3607         mci_store_persistent(mci);
3608
3609         /* Some recipients were tempfailed, try them on the next host */
3610         if (mci != NULL && mci->mci_retryrcpt && nummxhosts > hostnum)
3611         {
3612                 /* try next MX site */
3613                 goto tryhost;
3614         }
3615
3616         /* now close the connection */
3617         if (clever && mci != NULL && mci->mci_state != MCIS_CLOSED &&
3618             !bitset(MCIF_CACHED, mci->mci_flags))
3619                 smtpquit(m, mci, e);
3620
3621 cleanup: ;
3622         }
3623         SM_FINALLY
3624         {
3625                 /*
3626                 **  Restore state and return.
3627                 */
3628 #if XDEBUG
3629                 char wbuf[MAXLINE];
3630
3631                 /* make absolutely certain 0, 1, and 2 are in use */
3632                 (void) sm_snprintf(wbuf, sizeof(wbuf),
3633                                    "%s... end of deliver(%s)",
3634                                    e->e_to == NULL ? "NO-TO-LIST"
3635                                                    : shortenstring(e->e_to,
3636                                                                    MAXSHORTSTR),
3637                                   m->m_name);
3638                 checkfd012(wbuf);
3639 #endif /* XDEBUG */
3640
3641                 errno = 0;
3642
3643                 /*
3644                 **  It was originally necessary to set macro 'g' to NULL
3645                 **  because it previously pointed to an auto buffer.
3646                 **  We don't do this any more, so this may be unnecessary.
3647                 */
3648
3649                 macdefine(&e->e_macro, A_PERM, 'g', (char *) NULL);
3650                 e->e_to = NULL;
3651         }
3652         SM_END_TRY
3653         return rcode;
3654 }
3655
3656 /*
3657 **  MARKFAILURE -- mark a failure on a specific address.
3658 **
3659 **      Parameters:
3660 **              e -- the envelope we are sending.
3661 **              q -- the address to mark.
3662 **              mci -- mailer connection information.
3663 **              rcode -- the code signifying the particular failure.
3664 **              ovr -- override an existing code?
3665 **
3666 **      Returns:
3667 **              none.
3668 **
3669 **      Side Effects:
3670 **              marks the address (and possibly the envelope) with the
3671 **                      failure so that an error will be returned or
3672 **                      the message will be queued, as appropriate.
3673 */
3674
3675 void
3676 markfailure(e, q, mci, rcode, ovr)
3677         register ENVELOPE *e;
3678         register ADDRESS *q;
3679         register MCI *mci;
3680         int rcode;
3681         bool ovr;
3682 {
3683         int save_errno = errno;
3684         char *status = NULL;
3685         char *rstatus = NULL;
3686
3687         switch (rcode)
3688         {
3689           case EX_OK:
3690                 break;
3691
3692           case EX_TEMPFAIL:
3693           case EX_IOERR:
3694           case EX_OSERR:
3695                 q->q_state = QS_QUEUEUP;
3696                 break;
3697
3698           default:
3699                 q->q_state = QS_BADADDR;
3700                 break;
3701         }
3702
3703         /* find most specific error code possible */
3704         if (mci != NULL && mci->mci_status != NULL)
3705         {
3706                 status = sm_rpool_strdup_x(e->e_rpool, mci->mci_status);
3707                 if (mci->mci_rstatus != NULL)
3708                         rstatus = sm_rpool_strdup_x(e->e_rpool,
3709                                                     mci->mci_rstatus);
3710                 else
3711                         rstatus = NULL;
3712         }
3713         else if (e->e_status != NULL)
3714         {
3715                 status = e->e_status;
3716                 rstatus = NULL;
3717         }
3718         else
3719         {
3720                 switch (rcode)
3721                 {
3722                   case EX_USAGE:
3723                         status = "5.5.4";
3724                         break;
3725
3726                   case EX_DATAERR:
3727                         status = "5.5.2";
3728                         break;
3729
3730                   case EX_NOUSER:
3731                         status = "5.1.1";
3732                         break;
3733
3734                   case EX_NOHOST:
3735                         status = "5.1.2";
3736                         break;
3737
3738                   case EX_NOINPUT:
3739                   case EX_CANTCREAT:
3740                   case EX_NOPERM:
3741                         status = "5.3.0";
3742                         break;
3743
3744                   case EX_UNAVAILABLE:
3745                   case EX_SOFTWARE:
3746                   case EX_OSFILE:
3747                   case EX_PROTOCOL:
3748                   case EX_CONFIG:
3749                         status = "5.5.0";
3750                         break;
3751
3752                   case EX_OSERR:
3753                   case EX_IOERR:
3754                         status = "4.5.0";
3755                         break;
3756
3757                   case EX_TEMPFAIL:
3758                         status = "4.2.0";
3759                         break;
3760                 }
3761         }
3762
3763         /* new status? */
3764         if (status != NULL && *status != '\0' && (ovr || q->q_status == NULL ||
3765             *q->q_status == '\0' || *q->q_status < *status))
3766         {
3767                 q->q_status = status;
3768                 q->q_rstatus = rstatus;
3769         }
3770         if (rcode != EX_OK && q->q_rstatus == NULL &&
3771             q->q_mailer != NULL && q->q_mailer->m_diagtype != NULL &&
3772             sm_strcasecmp(q->q_mailer->m_diagtype, "X-UNIX") == 0)
3773         {
3774                 char buf[16];
3775
3776                 (void) sm_snprintf(buf, sizeof(buf), "%d", rcode);
3777                 q->q_rstatus = sm_rpool_strdup_x(e->e_rpool, buf);
3778         }
3779
3780         q->q_statdate = curtime();
3781         if (CurHostName != NULL && CurHostName[0] != '\0' &&
3782             mci != NULL && !bitset(M_LOCALMAILER, mci->mci_flags))
3783                 q->q_statmta = sm_rpool_strdup_x(e->e_rpool, CurHostName);
3784
3785         /* restore errno */
3786         errno = save_errno;
3787 }
3788 /*
3789 **  ENDMAILER -- Wait for mailer to terminate.
3790 **
3791 **      We should never get fatal errors (e.g., segmentation
3792 **      violation), so we report those specially.  For other
3793 **      errors, we choose a status message (into statmsg),
3794 **      and if it represents an error, we print it.
3795 **
3796 **      Parameters:
3797 **              mci -- the mailer connection info.
3798 **              e -- the current envelope.
3799 **              pv -- the parameter vector that invoked the mailer
3800 **                      (for error messages).
3801 **
3802 **      Returns:
3803 **              exit code of mailer.
3804 **
3805 **      Side Effects:
3806 **              none.
3807 */
3808
3809 static jmp_buf  EndWaitTimeout;
3810
3811 static void
3812 endwaittimeout(ignore)
3813         int ignore;
3814 {
3815         /*
3816         **  NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
3817         **      ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
3818         **      DOING.
3819         */
3820
3821         errno = ETIMEDOUT;
3822         longjmp(EndWaitTimeout, 1);
3823 }
3824
3825 int
3826 endmailer(mci, e, pv)
3827         register MCI *mci;
3828         register ENVELOPE *e;
3829         char **pv;
3830 {
3831         int st;
3832         int save_errno = errno;
3833         char buf[MAXLINE];
3834         SM_EVENT *ev = NULL;
3835
3836
3837         mci_unlock_host(mci);
3838
3839         /* close output to mailer */
3840         if (mci->mci_out != NULL)
3841         {
3842                 (void) sm_io_close(mci->mci_out, SM_TIME_DEFAULT);
3843                 mci->mci_out = NULL;
3844         }
3845
3846         /* copy any remaining input to transcript */
3847         if (mci->mci_in != NULL && mci->mci_state != MCIS_ERROR &&
3848             e->e_xfp != NULL)
3849         {
3850                 while (sfgets(buf, sizeof(buf), mci->mci_in,
3851                               TimeOuts.to_quit, "Draining Input") != NULL)
3852                         (void) sm_io_fputs(e->e_xfp, SM_TIME_DEFAULT, buf);
3853         }
3854
3855 #if SASL
3856         /* close SASL connection */
3857         if (bitset(MCIF_AUTHACT, mci->mci_flags))
3858         {
3859                 sasl_dispose(&mci->mci_conn);
3860                 mci->mci_flags &= ~MCIF_AUTHACT;
3861         }
3862 #endif /* SASL */
3863
3864 #if STARTTLS
3865         /* shutdown TLS */
3866         (void) endtlsclt(mci);
3867 #endif /* STARTTLS */
3868
3869         /* now close the input */
3870         if (mci->mci_in != NULL)
3871         {
3872                 (void) sm_io_close(mci->mci_in, SM_TIME_DEFAULT);
3873                 mci->mci_in = NULL;
3874         }
3875         mci->mci_state = MCIS_CLOSED;
3876
3877         errno = save_errno;
3878
3879         /* in the IPC case there is nothing to wait for */
3880         if (mci->mci_pid == 0)
3881                 return EX_OK;
3882
3883         /* put a timeout around the wait */
3884         if (mci->mci_mailer->m_wait > 0)
3885         {
3886                 if (setjmp(EndWaitTimeout) == 0)
3887                         ev = sm_setevent(mci->mci_mailer->m_wait,
3888                                          endwaittimeout, 0);
3889                 else
3890                 {
3891                         syserr("endmailer %s: wait timeout (%ld)",
3892                                mci->mci_mailer->m_name,
3893                                (long) mci->mci_mailer->m_wait);
3894                         return EX_TEMPFAIL;
3895                 }
3896         }
3897
3898         /* wait for the mailer process, collect status */
3899         st = waitfor(mci->mci_pid);
3900         save_errno = errno;
3901         if (ev != NULL)
3902                 sm_clrevent(ev);
3903         errno = save_errno;
3904
3905         if (st == -1)
3906         {
3907                 syserr("endmailer %s: wait", mci->mci_mailer->m_name);
3908                 return EX_SOFTWARE;
3909         }
3910
3911         if (WIFEXITED(st))
3912         {
3913                 /* normal death -- return status */
3914                 return (WEXITSTATUS(st));
3915         }
3916
3917         /* it died a horrid death */
3918         syserr("451 4.3.0 mailer %s died with signal %d%s",
3919                 mci->mci_mailer->m_name, WTERMSIG(st),
3920                 WCOREDUMP(st) ? " (core dumped)" :
3921                 (WIFSTOPPED(st) ? " (stopped)" : ""));
3922
3923         /* log the arguments */
3924         if (pv != NULL && e->e_xfp != NULL)
3925         {
3926                 register char **av;
3927
3928                 (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, "Arguments:");
3929                 for (av = pv; *av != NULL; av++)
3930                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, " %s",
3931                                              *av);
3932                 (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, "\n");
3933         }
3934
3935         ExitStat = EX_TEMPFAIL;
3936         return EX_TEMPFAIL;
3937 }
3938 /*
3939 **  GIVERESPONSE -- Interpret an error response from a mailer
3940 **
3941 **      Parameters:
3942 **              status -- the status code from the mailer (high byte
3943 **                      only; core dumps must have been taken care of
3944 **                      already).
3945 **              dsn -- the DSN associated with the address, if any.
3946 **              m -- the mailer info for this mailer.
3947 **              mci -- the mailer connection info -- can be NULL if the
3948 **                      response is given before the connection is made.
3949 **              ctladdr -- the controlling address for the recipient
3950 **                      address(es).
3951 **              xstart -- the transaction start time, for computing
3952 **                      transaction delays.
3953 **              e -- the current envelope.
3954 **              to -- the current recipient (NULL if none).
3955 **
3956 **      Returns:
3957 **              none.
3958 **
3959 **      Side Effects:
3960 **              Errors may be incremented.
3961 **              ExitStat may be set.
3962 */
3963
3964 void
3965 giveresponse(status, dsn, m, mci, ctladdr, xstart, e, to)
3966         int status;
3967         char *dsn;
3968         register MAILER *m;
3969         register MCI *mci;
3970         ADDRESS *ctladdr;
3971         time_t xstart;
3972         ENVELOPE *e;
3973         ADDRESS *to;
3974 {
3975         register const char *statmsg;
3976         int errnum = errno;
3977         int off = 4;
3978         bool usestat = false;
3979         char dsnbuf[ENHSCLEN];
3980         char buf[MAXLINE];
3981         char *exmsg;
3982
3983         if (e == NULL)
3984         {
3985                 syserr("giveresponse: null envelope");
3986                 /* NOTREACHED */
3987                 SM_ASSERT(0);
3988         }
3989
3990         /*
3991         **  Compute status message from code.
3992         */
3993
3994         exmsg = sm_sysexmsg(status);
3995         if (status == 0)
3996         {
3997                 statmsg = "250 2.0.0 Sent";
3998                 if (e->e_statmsg != NULL)
3999                 {
4000                         (void) sm_snprintf(buf, sizeof(buf), "%s (%s)",
4001                                            statmsg,
4002                                            shortenstring(e->e_statmsg, 403));
4003                         statmsg = buf;
4004                 }
4005         }
4006         else if (exmsg == NULL)
4007         {
4008                 (void) sm_snprintf(buf, sizeof(buf),
4009                                    "554 5.3.0 unknown mailer error %d",
4010                                    status);
4011                 status = EX_UNAVAILABLE;
4012                 statmsg = buf;
4013                 usestat = true;
4014         }
4015         else if (status == EX_TEMPFAIL)
4016         {
4017                 char *bp = buf;
4018
4019                 (void) sm_strlcpy(bp, exmsg + 1, SPACELEFT(buf, bp));
4020                 bp += strlen(bp);
4021 #if NAMED_BIND
4022                 if (h_errno == TRY_AGAIN)
4023                         statmsg = sm_errstring(h_errno + E_DNSBASE);
4024                 else
4025 #endif /* NAMED_BIND */
4026                 {
4027                         if (errnum != 0)
4028                                 statmsg = sm_errstring(errnum);
4029                         else
4030                                 statmsg = SmtpError;
4031                 }
4032                 if (statmsg != NULL && statmsg[0] != '\0')
4033                 {
4034                         switch (errnum)
4035                         {
4036 #ifdef ENETDOWN
4037                           case ENETDOWN:        /* Network is down */
4038 #endif /* ENETDOWN */
4039 #ifdef ENETUNREACH
4040                           case ENETUNREACH:     /* Network is unreachable */
4041 #endif /* ENETUNREACH */
4042 #ifdef ENETRESET
4043                           case ENETRESET:       /* Network dropped connection on reset */
4044 #endif /* ENETRESET */
4045 #ifdef ECONNABORTED
4046                           case ECONNABORTED:    /* Software caused connection abort */
4047 #endif /* ECONNABORTED */
4048 #ifdef EHOSTDOWN
4049                           case EHOSTDOWN:       /* Host is down */
4050 #endif /* EHOSTDOWN */
4051 #ifdef EHOSTUNREACH
4052                           case EHOSTUNREACH:    /* No route to host */
4053 #endif /* EHOSTUNREACH */
4054                                 if (mci != NULL && mci->mci_host != NULL)
4055                                 {
4056                                         (void) sm_strlcpyn(bp,
4057                                                            SPACELEFT(buf, bp),
4058                                                            2, ": ",
4059                                                            mci->mci_host);
4060                                         bp += strlen(bp);
4061                                 }
4062                                 break;
4063                         }
4064                         (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ": ",
4065                                            statmsg);
4066                         usestat = true;
4067                 }
4068                 statmsg = buf;
4069         }
4070 #if NAMED_BIND
4071         else if (status == EX_NOHOST && h_errno != 0)
4072         {
4073                 statmsg = sm_errstring(h_errno + E_DNSBASE);
4074                 (void) sm_snprintf(buf, sizeof(buf), "%s (%s)", exmsg + 1,
4075                                    statmsg);
4076                 statmsg = buf;
4077                 usestat = true;
4078         }
4079 #endif /* NAMED_BIND */
4080         else
4081         {
4082                 statmsg = exmsg;
4083                 if (*statmsg++ == ':' && errnum != 0)
4084                 {
4085                         (void) sm_snprintf(buf, sizeof(buf), "%s: %s", statmsg,
4086                                            sm_errstring(errnum));
4087                         statmsg = buf;
4088                         usestat = true;
4089                 }
4090                 else if (bitnset(M_LMTP, m->m_flags) && e->e_statmsg != NULL)
4091                 {
4092                         (void) sm_snprintf(buf, sizeof(buf), "%s (%s)", statmsg,
4093                                            shortenstring(e->e_statmsg, 403));
4094                         statmsg = buf;
4095                         usestat = true;
4096                 }
4097         }
4098
4099         /*
4100         **  Print the message as appropriate
4101         */
4102
4103         if (status == EX_OK || status == EX_TEMPFAIL)
4104         {
4105                 extern char MsgBuf[];
4106
4107                 if ((off = isenhsc(statmsg + 4, ' ')) > 0)
4108                 {
4109                         if (dsn == NULL)
4110                         {
4111                                 (void) sm_snprintf(dsnbuf, sizeof(dsnbuf),
4112                                                    "%.*s", off, statmsg + 4);
4113                                 dsn = dsnbuf;
4114                         }
4115                         off += 5;
4116                 }
4117                 else
4118                 {
4119                         off = 4;
4120                 }
4121                 message("%s", statmsg + off);
4122                 if (status == EX_TEMPFAIL && e->e_xfp != NULL)
4123                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, "%s\n",
4124                                              &MsgBuf[4]);
4125         }
4126         else
4127         {
4128                 char mbuf[ENHSCLEN + 4];
4129
4130                 Errors++;
4131                 if ((off = isenhsc(statmsg + 4, ' ')) > 0 &&
4132                     off < sizeof(mbuf) - 4)
4133                 {
4134                         if (dsn == NULL)
4135                         {
4136                                 (void) sm_snprintf(dsnbuf, sizeof(dsnbuf),
4137                                                    "%.*s", off, statmsg + 4);
4138                                 dsn = dsnbuf;
4139                         }
4140                         off += 5;
4141
4142                         /* copy only part of statmsg to mbuf */
4143                         (void) sm_strlcpy(mbuf, statmsg, off);
4144                         (void) sm_strlcat(mbuf, " %s", sizeof(mbuf));
4145                 }
4146                 else
4147                 {
4148                         dsnbuf[0] = '\0';
4149                         (void) sm_snprintf(mbuf, sizeof(mbuf), "%.3s %%s",
4150                                            statmsg);
4151                         off = 4;
4152                 }
4153                 usrerr(mbuf, &statmsg[off]);
4154         }
4155
4156         /*
4157         **  Final cleanup.
4158         **      Log a record of the transaction.  Compute the new
4159         **      ExitStat -- if we already had an error, stick with
4160         **      that.
4161         */
4162
4163         if (OpMode != MD_VERIFY && !bitset(EF_VRFYONLY, e->e_flags) &&
4164             LogLevel > ((status == EX_TEMPFAIL) ? 8 : (status == EX_OK) ? 7 : 6))
4165                 logdelivery(m, mci, dsn, statmsg + off, ctladdr, xstart, e);
4166
4167         if (tTd(11, 2))
4168                 sm_dprintf("giveresponse: status=%d, dsn=%s, e->e_message=%s, errnum=%d\n",
4169                            status,
4170                            dsn == NULL ? "<NULL>" : dsn,
4171                            e->e_message == NULL ? "<NULL>" : e->e_message,
4172                            errnum);
4173
4174         if (status != EX_TEMPFAIL)
4175                 setstat(status);
4176         if (status != EX_OK && (status != EX_TEMPFAIL || e->e_message == NULL))
4177                 e->e_message = sm_rpool_strdup_x(e->e_rpool, statmsg + off);
4178         if (status != EX_OK && to != NULL && to->q_message == NULL)
4179         {
4180                 if (!usestat && e->e_message != NULL)
4181                         to->q_message = sm_rpool_strdup_x(e->e_rpool,
4182                                                           e->e_message);
4183                 else
4184                         to->q_message = sm_rpool_strdup_x(e->e_rpool,
4185                                                           statmsg + off);
4186         }
4187         errno = 0;
4188         SM_SET_H_ERRNO(0);
4189 }
4190 /*
4191 **  LOGDELIVERY -- log the delivery in the system log
4192 **
4193 **      Care is taken to avoid logging lines that are too long, because
4194 **      some versions of syslog have an unfortunate proclivity for core
4195 **      dumping.  This is a hack, to be sure, that is at best empirical.
4196 **
4197 **      Parameters:
4198 **              m -- the mailer info.  Can be NULL for initial queue.
4199 **              mci -- the mailer connection info -- can be NULL if the
4200 **                      log is occurring when no connection is active.
4201 **              dsn -- the DSN attached to the status.
4202 **              status -- the message to print for the status.
4203 **              ctladdr -- the controlling address for the to list.
4204 **              xstart -- the transaction start time, used for
4205 **                      computing transaction delay.
4206 **              e -- the current envelope.
4207 **
4208 **      Returns:
4209 **              none
4210 **
4211 **      Side Effects:
4212 **              none
4213 */
4214
4215 void
4216 logdelivery(m, mci, dsn, status, ctladdr, xstart, e)
4217         MAILER *m;
4218         register MCI *mci;
4219         char *dsn;
4220         const char *status;
4221         ADDRESS *ctladdr;
4222         time_t xstart;
4223         register ENVELOPE *e;
4224 {
4225         register char *bp;
4226         register char *p;
4227         int l;
4228         time_t now = curtime();
4229         char buf[1024];
4230
4231 #if (SYSLOG_BUFSIZE) >= 256
4232         /* ctladdr: max 106 bytes */
4233         bp = buf;
4234         if (ctladdr != NULL)
4235         {
4236                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", ctladdr=",
4237                                    shortenstring(ctladdr->q_paddr, 83));
4238                 bp += strlen(bp);
4239                 if (bitset(QGOODUID, ctladdr->q_flags))
4240                 {
4241                         (void) sm_snprintf(bp, SPACELEFT(buf, bp), " (%d/%d)",
4242                                            (int) ctladdr->q_uid,
4243                                            (int) ctladdr->q_gid);
4244                         bp += strlen(bp);
4245                 }
4246         }
4247
4248         /* delay & xdelay: max 41 bytes */
4249         (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", delay=",
4250                            pintvl(now - e->e_ctime, true));
4251         bp += strlen(bp);
4252
4253         if (xstart != (time_t) 0)
4254         {
4255                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", xdelay=",
4256                                    pintvl(now - xstart, true));
4257                 bp += strlen(bp);
4258         }
4259
4260         /* mailer: assume about 19 bytes (max 10 byte mailer name) */
4261         if (m != NULL)
4262         {
4263                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", mailer=",
4264                                    m->m_name);
4265                 bp += strlen(bp);
4266         }
4267
4268         /* pri: changes with each delivery attempt */
4269         (void) sm_snprintf(bp, SPACELEFT(buf, bp), ", pri=%ld",
4270                 e->e_msgpriority);
4271         bp += strlen(bp);
4272
4273         /* relay: max 66 bytes for IPv4 addresses */
4274         if (mci != NULL && mci->mci_host != NULL)
4275         {
4276                 extern SOCKADDR CurHostAddr;
4277
4278                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", relay=",
4279                                    shortenstring(mci->mci_host, 40));
4280                 bp += strlen(bp);
4281
4282                 if (CurHostAddr.sa.sa_family != 0)
4283                 {
4284                         (void) sm_snprintf(bp, SPACELEFT(buf, bp), " [%s]",
4285                                            anynet_ntoa(&CurHostAddr));
4286                 }
4287         }
4288         else if (strcmp(status, "quarantined") == 0)
4289         {
4290                 if (e->e_quarmsg != NULL)
4291                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4292                                            ", quarantine=%s",
4293                                            shortenstring(e->e_quarmsg, 40));
4294         }
4295         else if (strcmp(status, "queued") != 0)
4296         {
4297                 p = macvalue('h', e);
4298                 if (p != NULL && p[0] != '\0')
4299                 {
4300                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4301                                            ", relay=%s", shortenstring(p, 40));
4302                 }
4303         }
4304         bp += strlen(bp);
4305
4306         /* dsn */
4307         if (dsn != NULL && *dsn != '\0')
4308         {
4309                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", dsn=",
4310                                    shortenstring(dsn, ENHSCLEN));
4311                 bp += strlen(bp);
4312         }
4313
4314 #if _FFR_LOG_NTRIES
4315         /* ntries */
4316         if (e->e_ntries >= 0)
4317         {
4318                 (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4319                                    ", ntries=%d", e->e_ntries + 1);
4320                 bp += strlen(bp);
4321         }
4322 #endif /* _FFR_LOG_NTRIES */
4323
4324 # define STATLEN                (((SYSLOG_BUFSIZE) - 100) / 4)
4325 # if (STATLEN) < 63
4326 #  undef STATLEN
4327 #  define STATLEN       63
4328 # endif /* (STATLEN) < 63 */
4329 # if (STATLEN) > 203
4330 #  undef STATLEN
4331 #  define STATLEN       203
4332 # endif /* (STATLEN) > 203 */
4333
4334         /* stat: max 210 bytes */
4335         if ((bp - buf) > (sizeof(buf) - ((STATLEN) + 20)))
4336         {
4337                 /* desperation move -- truncate data */
4338                 bp = buf + sizeof(buf) - ((STATLEN) + 17);
4339                 (void) sm_strlcpy(bp, "...", SPACELEFT(buf, bp));
4340                 bp += 3;
4341         }
4342
4343         (void) sm_strlcpy(bp, ", stat=", SPACELEFT(buf, bp));
4344         bp += strlen(bp);
4345
4346         (void) sm_strlcpy(bp, shortenstring(status, STATLEN),
4347                           SPACELEFT(buf, bp));
4348
4349         /* id, to: max 13 + TOBUFSIZE bytes */
4350         l = SYSLOG_BUFSIZE - 100 - strlen(buf);
4351         if (l < 0)
4352                 l = 0;
4353         p = e->e_to == NULL ? "NO-TO-LIST" : e->e_to;
4354         while (strlen(p) >= l)
4355         {
4356                 register char *q;
4357
4358                 for (q = p + l; q > p; q--)
4359                 {
4360                         if (*q == ',')
4361                                 break;
4362                 }
4363                 if (p == q)
4364                         break;
4365                 sm_syslog(LOG_INFO, e->e_id, "to=%.*s [more]%s",
4366                           (int) (++q - p), p, buf);
4367                 p = q;
4368         }
4369         sm_syslog(LOG_INFO, e->e_id, "to=%.*s%s", l, p, buf);
4370
4371 #else /* (SYSLOG_BUFSIZE) >= 256 */
4372
4373         l = SYSLOG_BUFSIZE - 85;
4374         if (l < 0)
4375                 l = 0;
4376         p = e->e_to == NULL ? "NO-TO-LIST" : e->e_to;
4377         while (strlen(p) >= l)
4378         {
4379                 register char *q;
4380
4381                 for (q = p + l; q > p; q--)
4382                 {
4383                         if (*q == ',')
4384                                 break;
4385                 }
4386                 if (p == q)
4387                         break;
4388
4389                 sm_syslog(LOG_INFO, e->e_id, "to=%.*s [more]",
4390                           (int) (++q - p), p);
4391                 p = q;
4392         }
4393         sm_syslog(LOG_INFO, e->e_id, "to=%.*s", l, p);
4394
4395         if (ctladdr != NULL)
4396         {
4397                 bp = buf;
4398                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, "ctladdr=",
4399                                    shortenstring(ctladdr->q_paddr, 83));
4400                 bp += strlen(bp);
4401                 if (bitset(QGOODUID, ctladdr->q_flags))
4402                 {
4403                         (void) sm_snprintf(bp, SPACELEFT(buf, bp), " (%d/%d)",
4404                                            ctladdr->q_uid, ctladdr->q_gid);
4405                         bp += strlen(bp);
4406                 }
4407                 sm_syslog(LOG_INFO, e->e_id, "%s", buf);
4408         }
4409         bp = buf;
4410         (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, "delay=",
4411                            pintvl(now - e->e_ctime, true));
4412         bp += strlen(bp);
4413         if (xstart != (time_t) 0)
4414         {
4415                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", xdelay=",
4416                                    pintvl(now - xstart, true));
4417                 bp += strlen(bp);
4418         }
4419
4420         if (m != NULL)
4421         {
4422                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", mailer=",
4423                                    m->m_name);
4424                 bp += strlen(bp);
4425         }
4426         sm_syslog(LOG_INFO, e->e_id, "%.1000s", buf);
4427
4428         buf[0] = '\0';
4429         bp = buf;
4430         if (mci != NULL && mci->mci_host != NULL)
4431         {
4432                 extern SOCKADDR CurHostAddr;
4433
4434                 (void) sm_snprintf(bp, SPACELEFT(buf, bp), "relay=%.100s",
4435                                    mci->mci_host);
4436                 bp += strlen(bp);
4437
4438                 if (CurHostAddr.sa.sa_family != 0)
4439                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4440                                            " [%.100s]",
4441                                            anynet_ntoa(&CurHostAddr));
4442         }
4443         else if (strcmp(status, "quarantined") == 0)
4444         {
4445                 if (e->e_quarmsg != NULL)
4446                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4447                                            ", quarantine=%.100s",
4448                                            e->e_quarmsg);
4449         }
4450         else if (strcmp(status, "queued") != 0)
4451         {
4452                 p = macvalue('h', e);
4453                 if (p != NULL && p[0] != '\0')
4454                         (void) sm_snprintf(buf, sizeof(buf), "relay=%.100s", p);
4455         }
4456         if (buf[0] != '\0')
4457                 sm_syslog(LOG_INFO, e->e_id, "%.1000s", buf);
4458
4459         sm_syslog(LOG_INFO, e->e_id, "stat=%s", shortenstring(status, 63));
4460 #endif /* (SYSLOG_BUFSIZE) >= 256 */
4461 }
4462 /*
4463 **  PUTFROMLINE -- output a UNIX-style from line (or whatever)
4464 **
4465 **      This can be made an arbitrary message separator by changing $l
4466 **
4467 **      One of the ugliest hacks seen by human eyes is contained herein:
4468 **      UUCP wants those stupid "remote from <host>" lines.  Why oh why
4469 **      does a well-meaning programmer such as myself have to deal with
4470 **      this kind of antique garbage????
4471 **
4472 **      Parameters:
4473 **              mci -- the connection information.
4474 **              e -- the envelope.
4475 **
4476 **      Returns:
4477 **              true iff line was written successfully
4478 **
4479 **      Side Effects:
4480 **              outputs some text to fp.
4481 */
4482
4483 bool
4484 putfromline(mci, e)
4485         register MCI *mci;
4486         ENVELOPE *e;
4487 {
4488         char *template = UnixFromLine;
4489         char buf[MAXLINE];
4490         char xbuf[MAXLINE];
4491
4492         if (bitnset(M_NHDR, mci->mci_mailer->m_flags))
4493                 return true;
4494
4495         mci->mci_flags |= MCIF_INHEADER;
4496
4497         if (bitnset(M_UGLYUUCP, mci->mci_mailer->m_flags))
4498         {
4499                 char *bang;
4500
4501                 expand("\201g", buf, sizeof(buf), e);
4502                 bang = strchr(buf, '!');
4503                 if (bang == NULL)
4504                 {
4505                         char *at;
4506                         char hname[MAXNAME];
4507
4508                         /*
4509                         **  If we can construct a UUCP path, do so
4510                         */
4511
4512                         at = strrchr(buf, '@');
4513                         if (at == NULL)
4514                         {
4515                                 expand("\201k", hname, sizeof(hname), e);
4516                                 at = hname;
4517                         }
4518                         else
4519                                 *at++ = '\0';
4520                         (void) sm_snprintf(xbuf, sizeof(xbuf),
4521                                            "From %.800s  \201d remote from %.100s\n",
4522                                            buf, at);
4523                 }
4524                 else
4525                 {
4526                         *bang++ = '\0';
4527                         (void) sm_snprintf(xbuf, sizeof(xbuf),
4528                                            "From %.800s  \201d remote from %.100s\n",
4529                                            bang, buf);
4530                         template = xbuf;
4531                 }
4532         }
4533         expand(template, buf, sizeof(buf), e);
4534         return putxline(buf, strlen(buf), mci, PXLF_HEADER);
4535 }
4536
4537 /*
4538 **  PUTBODY -- put the body of a message.
4539 **
4540 **      Parameters:
4541 **              mci -- the connection information.
4542 **              e -- the envelope to put out.
4543 **              separator -- if non-NULL, a message separator that must
4544 **                      not be permitted in the resulting message.
4545 **
4546 **      Returns:
4547 **              true iff message was written successfully
4548 **
4549 **      Side Effects:
4550 **              The message is written onto fp.
4551 */
4552
4553 /* values for output state variable */
4554 #define OSTATE_HEAD     0       /* at beginning of line */
4555 #define OSTATE_CR       1       /* read a carriage return */
4556 #define OSTATE_INLINE   2       /* putting rest of line */
4557
4558 bool
4559 putbody(mci, e, separator)
4560         register MCI *mci;
4561         register ENVELOPE *e;
4562         char *separator;
4563 {
4564         bool dead = false;
4565         bool ioerr = false;
4566         int save_errno;
4567         char buf[MAXLINE];
4568 #if MIME8TO7
4569         char *boundaries[MAXMIMENESTING + 1];
4570 #endif /* MIME8TO7 */
4571
4572         /*
4573         **  Output the body of the message
4574         */
4575
4576         if (e->e_dfp == NULL && bitset(EF_HAS_DF, e->e_flags))
4577         {
4578                 char *df = queuename(e, DATAFL_LETTER);
4579
4580                 e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, df,
4581                                       SM_IO_RDONLY_B, NULL);
4582                 if (e->e_dfp == NULL)
4583                 {
4584                         char *msg = "!putbody: Cannot open %s for %s from %s";
4585
4586                         if (errno == ENOENT)
4587                                 msg++;
4588                         syserr(msg, df, e->e_to, e->e_from.q_paddr);
4589                 }
4590
4591         }
4592         if (e->e_dfp == NULL)
4593         {
4594                 if (bitset(MCIF_INHEADER, mci->mci_flags))
4595                 {
4596                         if (!putline("", mci))
4597                                 goto writeerr;
4598                         mci->mci_flags &= ~MCIF_INHEADER;
4599                 }
4600                 if (!putline("<<< No Message Collected >>>", mci))
4601                         goto writeerr;
4602                 goto endofmessage;
4603         }
4604
4605         if (e->e_dfino == (ino_t) 0)
4606         {
4607                 struct stat stbuf;
4608
4609                 if (fstat(sm_io_getinfo(e->e_dfp, SM_IO_WHAT_FD, NULL), &stbuf)
4610                     < 0)
4611                         e->e_dfino = -1;
4612                 else
4613                 {
4614                         e->e_dfdev = stbuf.st_dev;
4615                         e->e_dfino = stbuf.st_ino;
4616                 }
4617         }
4618
4619         /* paranoia: the data file should always be in a rewound state */
4620         (void) bfrewind(e->e_dfp);
4621
4622         /* simulate an I/O timeout when used as source */
4623         if (tTd(84, 101))
4624                 sleep(319);
4625
4626 #if MIME8TO7
4627         if (bitset(MCIF_CVT8TO7, mci->mci_flags))
4628         {
4629                 /*
4630                 **  Do 8 to 7 bit MIME conversion.
4631                 */
4632
4633                 /* make sure it looks like a MIME message */
4634                 if (hvalue("MIME-Version", e->e_header) == NULL &&
4635                     !putline("MIME-Version: 1.0", mci))
4636                         goto writeerr;
4637
4638                 if (hvalue("Content-Type", e->e_header) == NULL)
4639                 {
4640                         (void) sm_snprintf(buf, sizeof(buf),
4641                                            "Content-Type: text/plain; charset=%s",
4642                                            defcharset(e));
4643                         if (!putline(buf, mci))
4644                                 goto writeerr;
4645                 }
4646
4647                 /* now do the hard work */
4648                 boundaries[0] = NULL;
4649                 mci->mci_flags |= MCIF_INHEADER;
4650                 if (mime8to7(mci, e->e_header, e, boundaries, M87F_OUTER, 0) ==
4651                                                                 SM_IO_EOF)
4652                         goto writeerr;
4653         }
4654 # if MIME7TO8
4655         else if (bitset(MCIF_CVT7TO8, mci->mci_flags))
4656         {
4657                 if (!mime7to8(mci, e->e_header, e))
4658                         goto writeerr;
4659         }
4660 # endif /* MIME7TO8 */
4661         else if (MaxMimeHeaderLength > 0 || MaxMimeFieldLength > 0)
4662         {
4663                 bool oldsuprerrs = SuprErrs;
4664
4665                 /* Use mime8to7 to check multipart for MIME header overflows */
4666                 boundaries[0] = NULL;
4667                 mci->mci_flags |= MCIF_INHEADER;
4668
4669                 /*
4670                 **  If EF_DONT_MIME is set, we have a broken MIME message
4671                 **  and don't want to generate a new bounce message whose
4672                 **  body propagates the broken MIME.  We can't just not call
4673                 **  mime8to7() as is done above since we need the security
4674                 **  checks.  The best we can do is suppress the errors.
4675                 */
4676
4677                 if (bitset(EF_DONT_MIME, e->e_flags))
4678                         SuprErrs = true;
4679
4680                 if (mime8to7(mci, e->e_header, e, boundaries,
4681                                 M87F_OUTER|M87F_NO8TO7, 0) == SM_IO_EOF)
4682                         goto writeerr;
4683
4684                 /* restore SuprErrs */
4685                 SuprErrs = oldsuprerrs;
4686         }
4687         else
4688 #endif /* MIME8TO7 */
4689         {
4690                 int ostate;
4691                 register char *bp;
4692                 register char *pbp;
4693                 register int c;
4694                 register char *xp;
4695                 int padc;
4696                 char *buflim;
4697                 int pos = 0;
4698                 char peekbuf[12];
4699
4700                 if (bitset(MCIF_INHEADER, mci->mci_flags))
4701                 {
4702                         if (!putline("", mci))
4703                                 goto writeerr;
4704                         mci->mci_flags &= ~MCIF_INHEADER;
4705                 }
4706
4707                 /* determine end of buffer; allow for short mailer lines */
4708                 buflim = &buf[sizeof(buf) - 1];
4709                 if (mci->mci_mailer->m_linelimit > 0 &&
4710                     mci->mci_mailer->m_linelimit < sizeof(buf) - 1)
4711                         buflim = &buf[mci->mci_mailer->m_linelimit - 1];
4712
4713                 /* copy temp file to output with mapping */
4714                 ostate = OSTATE_HEAD;
4715                 bp = buf;
4716                 pbp = peekbuf;
4717                 while (!sm_io_error(mci->mci_out) && !dead)
4718                 {
4719                         if (pbp > peekbuf)
4720                                 c = *--pbp;
4721                         else if ((c = sm_io_getc(e->e_dfp, SM_TIME_DEFAULT))
4722                                  == SM_IO_EOF)
4723                                 break;
4724                         if (bitset(MCIF_7BIT, mci->mci_flags))
4725                                 c &= 0x7f;
4726                         switch (ostate)
4727                         {
4728                           case OSTATE_HEAD:
4729                                 if (c == '\0' &&
4730                                     bitnset(M_NONULLS,
4731                                             mci->mci_mailer->m_flags))
4732                                         break;
4733                                 if (c != '\r' && c != '\n' && bp < buflim)
4734                                 {
4735                                         *bp++ = c;
4736                                         break;
4737                                 }
4738
4739                                 /* check beginning of line for special cases */
4740                                 *bp = '\0';
4741                                 pos = 0;
4742                                 padc = SM_IO_EOF;
4743                                 if (buf[0] == 'F' &&
4744                                     bitnset(M_ESCFROM, mci->mci_mailer->m_flags)
4745                                     && strncmp(buf, "From ", 5) == 0)
4746                                 {
4747                                         padc = '>';
4748                                 }
4749                                 if (buf[0] == '-' && buf[1] == '-' &&
4750                                     separator != NULL)
4751                                 {
4752                                         /* possible separator */
4753                                         int sl = strlen(separator);
4754
4755                                         if (strncmp(&buf[2], separator, sl)
4756                                             == 0)
4757                                                 padc = ' ';
4758                                 }
4759                                 if (buf[0] == '.' &&
4760                                     bitnset(M_XDOT, mci->mci_mailer->m_flags))
4761                                 {
4762                                         padc = '.';
4763                                 }
4764
4765                                 /* now copy out saved line */
4766                                 if (TrafficLogFile != NULL)
4767                                 {
4768                                         (void) sm_io_fprintf(TrafficLogFile,
4769                                                              SM_TIME_DEFAULT,
4770                                                              "%05d >>> ",
4771                                                              (int) CurrentPid);
4772                                         if (padc != SM_IO_EOF)
4773                                                 (void) sm_io_putc(TrafficLogFile,
4774                                                                   SM_TIME_DEFAULT,
4775                                                                   padc);
4776                                         for (xp = buf; xp < bp; xp++)
4777                                                 (void) sm_io_putc(TrafficLogFile,
4778                                                                   SM_TIME_DEFAULT,
4779                                                                   (unsigned char) *xp);
4780                                         if (c == '\n')
4781                                                 (void) sm_io_fputs(TrafficLogFile,
4782                                                                    SM_TIME_DEFAULT,
4783                                                                    mci->mci_mailer->m_eol);
4784                                 }
4785                                 if (padc != SM_IO_EOF)
4786                                 {
4787                                         if (sm_io_putc(mci->mci_out,
4788                                                        SM_TIME_DEFAULT, padc)
4789                                             == SM_IO_EOF)
4790                                         {
4791                                                 dead = true;
4792                                                 continue;
4793                                         }
4794                                         pos++;
4795                                 }
4796                                 for (xp = buf; xp < bp; xp++)
4797                                 {
4798                                         if (sm_io_putc(mci->mci_out,
4799                                                        SM_TIME_DEFAULT,
4800                                                        (unsigned char) *xp)
4801                                             == SM_IO_EOF)
4802                                         {
4803                                                 dead = true;
4804                                                 break;
4805                                         }
4806                                 }
4807                                 if (dead)
4808                                         continue;
4809                                 if (c == '\n')
4810                                 {
4811                                         if (sm_io_fputs(mci->mci_out,
4812                                                         SM_TIME_DEFAULT,
4813                                                         mci->mci_mailer->m_eol)
4814                                                         == SM_IO_EOF)
4815                                                 break;
4816                                         pos = 0;
4817                                 }
4818                                 else
4819                                 {
4820                                         pos += bp - buf;
4821                                         if (c != '\r')
4822                                         {
4823                                                 SM_ASSERT(pbp < peekbuf +
4824                                                                 sizeof(peekbuf));
4825                                                 *pbp++ = c;
4826                                         }
4827                                 }
4828
4829                                 bp = buf;
4830
4831                                 /* determine next state */
4832                                 if (c == '\n')
4833                                         ostate = OSTATE_HEAD;
4834                                 else if (c == '\r')
4835                                         ostate = OSTATE_CR;
4836                                 else
4837                                         ostate = OSTATE_INLINE;
4838                                 continue;
4839
4840                           case OSTATE_CR:
4841                                 if (c == '\n')
4842                                 {
4843                                         /* got CRLF */
4844                                         if (sm_io_fputs(mci->mci_out,
4845                                                         SM_TIME_DEFAULT,
4846                                                         mci->mci_mailer->m_eol)
4847                                                         == SM_IO_EOF)
4848                                                 continue;
4849
4850                                         if (TrafficLogFile != NULL)
4851                                         {
4852                                                 (void) sm_io_fputs(TrafficLogFile,
4853                                                                    SM_TIME_DEFAULT,
4854                                                                    mci->mci_mailer->m_eol);
4855                                         }
4856                                         pos = 0;
4857                                         ostate = OSTATE_HEAD;
4858                                         continue;
4859                                 }
4860
4861                                 /* had a naked carriage return */
4862                                 SM_ASSERT(pbp < peekbuf + sizeof(peekbuf));
4863                                 *pbp++ = c;
4864                                 c = '\r';
4865                                 ostate = OSTATE_INLINE;
4866                                 goto putch;
4867
4868                           case OSTATE_INLINE:
4869                                 if (c == '\r')
4870                                 {
4871                                         ostate = OSTATE_CR;
4872                                         continue;
4873                                 }
4874                                 if (c == '\0' &&
4875                                     bitnset(M_NONULLS,
4876                                             mci->mci_mailer->m_flags))
4877                                         break;
4878 putch:
4879                                 if (mci->mci_mailer->m_linelimit > 0 &&
4880                                     pos >= mci->mci_mailer->m_linelimit - 1 &&
4881                                     c != '\n')
4882                                 {
4883                                         int d;
4884
4885                                         /* check next character for EOL */
4886                                         if (pbp > peekbuf)
4887                                                 d = *(pbp - 1);
4888                                         else if ((d = sm_io_getc(e->e_dfp,
4889                                                                  SM_TIME_DEFAULT))
4890                                                  != SM_IO_EOF)
4891                                         {
4892                                                 SM_ASSERT(pbp < peekbuf +
4893                                                                 sizeof(peekbuf));
4894                                                 *pbp++ = d;
4895                                         }
4896
4897                                         if (d == '\n' || d == SM_IO_EOF)
4898                                         {
4899                                                 if (TrafficLogFile != NULL)
4900                                                         (void) sm_io_putc(TrafficLogFile,
4901                                                                           SM_TIME_DEFAULT,
4902                                                                           (unsigned char) c);
4903                                                 if (sm_io_putc(mci->mci_out,
4904                                                                SM_TIME_DEFAULT,
4905                                                                (unsigned char) c)
4906                                                                == SM_IO_EOF)
4907                                                 {
4908                                                         dead = true;
4909                                                         continue;
4910                                                 }
4911                                                 pos++;
4912                                                 continue;
4913                                         }
4914
4915                                         if (sm_io_putc(mci->mci_out,
4916                                                        SM_TIME_DEFAULT, '!')
4917                                             == SM_IO_EOF ||
4918                                             sm_io_fputs(mci->mci_out,
4919                                                         SM_TIME_DEFAULT,
4920                                                         mci->mci_mailer->m_eol)
4921                                             == SM_IO_EOF)
4922                                         {
4923                                                 dead = true;
4924                                                 continue;
4925                                         }
4926
4927                                         if (TrafficLogFile != NULL)
4928                                         {
4929                                                 (void) sm_io_fprintf(TrafficLogFile,
4930                                                                      SM_TIME_DEFAULT,
4931                                                                      "!%s",
4932                                                                      mci->mci_mailer->m_eol);
4933                                         }
4934                                         ostate = OSTATE_HEAD;
4935                                         SM_ASSERT(pbp < peekbuf +
4936                                                         sizeof(peekbuf));
4937                                         *pbp++ = c;
4938                                         continue;
4939                                 }
4940                                 if (c == '\n')
4941                                 {
4942                                         if (TrafficLogFile != NULL)
4943                                                 (void) sm_io_fputs(TrafficLogFile,
4944                                                                    SM_TIME_DEFAULT,
4945                                                                    mci->mci_mailer->m_eol);
4946                                         if (sm_io_fputs(mci->mci_out,
4947                                                         SM_TIME_DEFAULT,
4948                                                         mci->mci_mailer->m_eol)
4949                                                         == SM_IO_EOF)
4950                                                 continue;
4951                                         pos = 0;
4952                                         ostate = OSTATE_HEAD;
4953                                 }
4954                                 else
4955                                 {
4956                                         if (TrafficLogFile != NULL)
4957                                                 (void) sm_io_putc(TrafficLogFile,
4958                                                                   SM_TIME_DEFAULT,
4959                                                                   (unsigned char) c);
4960                                         if (sm_io_putc(mci->mci_out,
4961                                                        SM_TIME_DEFAULT,
4962                                                        (unsigned char) c)
4963                                             == SM_IO_EOF)
4964                                         {
4965                                                 dead = true;
4966                                                 continue;
4967                                         }
4968                                         pos++;
4969                                         ostate = OSTATE_INLINE;
4970                                 }
4971                                 break;
4972                         }
4973                 }
4974
4975                 /* make sure we are at the beginning of a line */
4976                 if (bp > buf)
4977                 {
4978                         if (TrafficLogFile != NULL)
4979                         {
4980                                 for (xp = buf; xp < bp; xp++)
4981                                         (void) sm_io_putc(TrafficLogFile,
4982                                                           SM_TIME_DEFAULT,
4983                                                           (unsigned char) *xp);
4984                         }
4985                         for (xp = buf; xp < bp; xp++)
4986                         {
4987                                 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT,
4988                                                (unsigned char) *xp)
4989                                     == SM_IO_EOF)
4990                                 {
4991                                         dead = true;
4992                                         break;
4993                                 }
4994                         }
4995                         pos += bp - buf;
4996                 }
4997                 if (!dead && pos > 0)
4998                 {
4999                         if (TrafficLogFile != NULL)
5000                                 (void) sm_io_fputs(TrafficLogFile,
5001                                                    SM_TIME_DEFAULT,
5002                                                    mci->mci_mailer->m_eol);
5003                         if (sm_io_fputs(mci->mci_out, SM_TIME_DEFAULT,
5004                                            mci->mci_mailer->m_eol) == SM_IO_EOF)
5005                                 goto writeerr;
5006                 }
5007         }
5008
5009         if (sm_io_error(e->e_dfp))
5010         {
5011                 syserr("putbody: %s/%cf%s: read error",
5012                        qid_printqueue(e->e_dfqgrp, e->e_dfqdir),
5013                        DATAFL_LETTER, e->e_id);
5014                 ExitStat = EX_IOERR;
5015                 ioerr = true;
5016         }
5017
5018 endofmessage:
5019         /*
5020         **  Since mailfile() uses e_dfp in a child process,
5021         **  the file offset in the stdio library for the
5022         **  parent process will not agree with the in-kernel
5023         **  file offset since the file descriptor is shared
5024         **  between the processes.  Therefore, it is vital
5025         **  that the file always be rewound.  This forces the
5026         **  kernel offset (lseek) and stdio library (ftell)
5027         **  offset to match.
5028         */
5029
5030         save_errno = errno;
5031         if (e->e_dfp != NULL)
5032                 (void) bfrewind(e->e_dfp);
5033
5034         /* some mailers want extra blank line at end of message */
5035         if (!dead && bitnset(M_BLANKEND, mci->mci_mailer->m_flags) &&
5036             buf[0] != '\0' && buf[0] != '\n')
5037         {
5038                 if (!putline("", mci))
5039                         goto writeerr;
5040         }
5041
5042         if (!dead &&
5043             (sm_io_flush(mci->mci_out, SM_TIME_DEFAULT) == SM_IO_EOF ||
5044              (sm_io_error(mci->mci_out) && errno != EPIPE)))
5045         {
5046                 save_errno = errno;
5047                 syserr("putbody: write error");
5048                 ExitStat = EX_IOERR;
5049                 ioerr = true;
5050         }
5051
5052         errno = save_errno;
5053         return !dead && !ioerr;
5054
5055   writeerr:
5056         return false;
5057 }
5058
5059 /*
5060 **  MAILFILE -- Send a message to a file.
5061 **
5062 **      If the file has the set-user-ID/set-group-ID bits set, but NO
5063 **      execute bits, sendmail will try to become the owner of that file
5064 **      rather than the real user.  Obviously, this only works if
5065 **      sendmail runs as root.
5066 **
5067 **      This could be done as a subordinate mailer, except that it
5068 **      is used implicitly to save messages in ~/dead.letter.  We
5069 **      view this as being sufficiently important as to include it
5070 **      here.  For example, if the system is dying, we shouldn't have
5071 **      to create another process plus some pipes to save the message.
5072 **
5073 **      Parameters:
5074 **              filename -- the name of the file to send to.
5075 **              mailer -- mailer definition for recipient -- if NULL,
5076 **                      use FileMailer.
5077 **              ctladdr -- the controlling address header -- includes
5078 **                      the userid/groupid to be when sending.
5079 **              sfflags -- flags for opening.
5080 **              e -- the current envelope.
5081 **
5082 **      Returns:
5083 **              The exit code associated with the operation.
5084 **
5085 **      Side Effects:
5086 **              none.
5087 */
5088
5089 # define RETURN(st)                     exit(st);
5090
5091 static jmp_buf  CtxMailfileTimeout;
5092
5093 int
5094 mailfile(filename, mailer, ctladdr, sfflags, e)
5095         char *volatile filename;
5096         MAILER *volatile mailer;
5097         ADDRESS *ctladdr;
5098         volatile long sfflags;
5099         register ENVELOPE *e;
5100 {
5101         register SM_FILE_T *f;
5102         register pid_t pid = -1;
5103         volatile int mode;
5104         int len;
5105         off_t curoff;
5106         bool suidwarn = geteuid() == 0;
5107         char *p;
5108         char *volatile realfile;
5109         SM_EVENT *ev;
5110         char buf[MAXPATHLEN];
5111         char targetfile[MAXPATHLEN];
5112
5113         if (tTd(11, 1))
5114         {
5115                 sm_dprintf("mailfile %s\n  ctladdr=", filename);
5116                 printaddr(sm_debug_file(), ctladdr, false);
5117         }
5118
5119         if (mailer == NULL)
5120                 mailer = FileMailer;
5121
5122         if (e->e_xfp != NULL)
5123                 (void) sm_io_flush(e->e_xfp, SM_TIME_DEFAULT);
5124
5125         /*
5126         **  Special case /dev/null.  This allows us to restrict file
5127         **  delivery to regular files only.
5128         */
5129
5130         if (sm_path_isdevnull(filename))
5131                 return EX_OK;
5132
5133         /* check for 8-bit available */
5134         if (bitset(EF_HAS8BIT, e->e_flags) &&
5135             bitnset(M_7BITS, mailer->m_flags) &&
5136             (bitset(EF_DONT_MIME, e->e_flags) ||
5137              !(bitset(MM_MIME8BIT, MimeMode) ||
5138                (bitset(EF_IS_MIME, e->e_flags) &&
5139                 bitset(MM_CVTMIME, MimeMode)))))
5140         {
5141                 e->e_status = "5.6.3";
5142                 usrerrenh(e->e_status,
5143                           "554 Cannot send 8-bit data to 7-bit destination");
5144                 errno = 0;
5145                 return EX_DATAERR;
5146         }
5147
5148         /* Find the actual file */
5149         if (SafeFileEnv != NULL && SafeFileEnv[0] != '\0')
5150         {
5151                 len = strlen(SafeFileEnv);
5152
5153                 if (strncmp(SafeFileEnv, filename, len) == 0)
5154                         filename += len;
5155
5156                 if (len + strlen(filename) + 1 >= sizeof(targetfile))
5157                 {
5158                         syserr("mailfile: filename too long (%s/%s)",
5159                                SafeFileEnv, filename);
5160                         return EX_CANTCREAT;
5161                 }
5162                 (void) sm_strlcpy(targetfile, SafeFileEnv, sizeof(targetfile));
5163                 realfile = targetfile + len;
5164                 if (*filename == '/')
5165                         filename++;
5166                 if (*filename != '\0')
5167                 {
5168                         /* paranoia: trailing / should be removed in readcf */
5169                         if (targetfile[len - 1] != '/')
5170                                 (void) sm_strlcat(targetfile,
5171                                                   "/", sizeof(targetfile));
5172                         (void) sm_strlcat(targetfile, filename,
5173                                           sizeof(targetfile));
5174                 }
5175         }
5176         else if (mailer->m_rootdir != NULL)
5177         {
5178                 expand(mailer->m_rootdir, targetfile, sizeof(targetfile), e);
5179                 len = strlen(targetfile);
5180
5181                 if (strncmp(targetfile, filename, len) == 0)
5182                         filename += len;
5183
5184                 if (len + strlen(filename) + 1 >= sizeof(targetfile))
5185                 {
5186                         syserr("mailfile: filename too long (%s/%s)",
5187                                targetfile, filename);
5188                         return EX_CANTCREAT;
5189                 }
5190                 realfile = targetfile + len;
5191                 if (targetfile[len - 1] != '/')
5192                         (void) sm_strlcat(targetfile, "/", sizeof(targetfile));
5193                 if (*filename == '/')
5194                         (void) sm_strlcat(targetfile, filename + 1,
5195                                           sizeof(targetfile));
5196                 else
5197                         (void) sm_strlcat(targetfile, filename,
5198                                           sizeof(targetfile));
5199         }
5200         else
5201         {
5202                 if (sm_strlcpy(targetfile, filename, sizeof(targetfile)) >=
5203                     sizeof(targetfile))
5204                 {
5205                         syserr("mailfile: filename too long (%s)", filename);
5206                         return EX_CANTCREAT;
5207                 }
5208                 realfile = targetfile;
5209         }
5210
5211         /*
5212         **  Fork so we can change permissions here.
5213         **      Note that we MUST use fork, not vfork, because of
5214         **      the complications of calling subroutines, etc.
5215         */
5216
5217
5218         /*
5219         **  Dispose of SIGCHLD signal catchers that may be laying
5220         **  around so that the waitfor() below will get it.
5221         */
5222
5223         (void) sm_signal(SIGCHLD, SIG_DFL);
5224
5225         DOFORK(fork);
5226
5227         if (pid < 0)
5228                 return EX_OSERR;
5229         else if (pid == 0)
5230         {
5231                 /* child -- actually write to file */
5232                 struct stat stb;
5233                 MCI mcibuf;
5234                 int err;
5235                 volatile int oflags = O_WRONLY|O_APPEND;
5236
5237                 /* Reset global flags */
5238                 RestartRequest = NULL;
5239                 RestartWorkGroup = false;
5240                 ShutdownRequest = NULL;
5241                 PendingSignal = 0;
5242                 CurrentPid = getpid();
5243
5244                 if (e->e_lockfp != NULL)
5245                 {
5246                         int fd;
5247
5248                         fd = sm_io_getinfo(e->e_lockfp, SM_IO_WHAT_FD, NULL);
5249                         /* SM_ASSERT(fd >= 0); */
5250                         if (fd >= 0)
5251                                 (void) close(fd);
5252                 }
5253
5254                 (void) sm_signal(SIGINT, SIG_DFL);
5255                 (void) sm_signal(SIGHUP, SIG_DFL);
5256                 (void) sm_signal(SIGTERM, SIG_DFL);
5257                 (void) umask(OldUmask);
5258                 e->e_to = filename;
5259                 ExitStat = EX_OK;
5260
5261                 if (setjmp(CtxMailfileTimeout) != 0)
5262                 {
5263                         RETURN(EX_TEMPFAIL);
5264                 }
5265
5266                 if (TimeOuts.to_fileopen > 0)
5267                         ev = sm_setevent(TimeOuts.to_fileopen, mailfiletimeout,
5268                                          0);
5269                 else
5270                         ev = NULL;
5271
5272                 /* check file mode to see if set-user-ID */
5273                 if (stat(targetfile, &stb) < 0)
5274                         mode = FileMode;
5275                 else
5276                         mode = stb.st_mode;
5277
5278                 /* limit the errors to those actually caused in the child */
5279                 errno = 0;
5280                 ExitStat = EX_OK;
5281
5282                 /* Allow alias expansions to use the S_IS{U,G}ID bits */
5283                 if ((ctladdr != NULL && !bitset(QALIAS, ctladdr->q_flags)) ||
5284                     bitset(SFF_RUNASREALUID, sfflags))
5285                 {
5286                         /* ignore set-user-ID and set-group-ID bits */
5287                         mode &= ~(S_ISGID|S_ISUID);
5288                         if (tTd(11, 20))
5289                                 sm_dprintf("mailfile: ignoring set-user-ID/set-group-ID bits\n");
5290                 }
5291
5292                 /* we have to open the data file BEFORE setuid() */
5293                 if (e->e_dfp == NULL && bitset(EF_HAS_DF, e->e_flags))
5294                 {
5295                         char *df = queuename(e, DATAFL_LETTER);
5296
5297                         e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, df,
5298                                               SM_IO_RDONLY_B, NULL);
5299                         if (e->e_dfp == NULL)
5300                         {
5301                                 syserr("mailfile: Cannot open %s for %s from %s",
5302                                         df, e->e_to, e->e_from.q_paddr);
5303                         }
5304                 }
5305
5306                 /* select a new user to run as */
5307                 if (!bitset(SFF_RUNASREALUID, sfflags))
5308                 {
5309                         if (bitnset(M_SPECIFIC_UID, mailer->m_flags))
5310                         {
5311                                 RealUserName = NULL;
5312                                 if (mailer->m_uid == NO_UID)
5313                                         RealUid = RunAsUid;
5314                                 else
5315                                         RealUid = mailer->m_uid;
5316                                 if (RunAsUid != 0 && RealUid != RunAsUid)
5317                                 {
5318                                         /* Only root can change the uid */
5319                                         syserr("mailfile: insufficient privileges to change uid, RunAsUid=%d, RealUid=%d",
5320                                                 (int) RunAsUid, (int) RealUid);
5321                                         RETURN(EX_TEMPFAIL);
5322                                 }
5323                         }
5324                         else if (bitset(S_ISUID, mode))
5325                         {
5326                                 RealUserName = NULL;
5327                                 RealUid = stb.st_uid;
5328                         }
5329                         else if (ctladdr != NULL && ctladdr->q_uid != 0)
5330                         {
5331                                 if (ctladdr->q_ruser != NULL)
5332                                         RealUserName = ctladdr->q_ruser;
5333                                 else
5334                                         RealUserName = ctladdr->q_user;
5335                                 RealUid = ctladdr->q_uid;
5336                         }
5337                         else if (mailer != NULL && mailer->m_uid != NO_UID)
5338                         {
5339                                 RealUserName = DefUser;
5340                                 RealUid = mailer->m_uid;
5341                         }
5342                         else
5343                         {
5344                                 RealUserName = DefUser;
5345                                 RealUid = DefUid;
5346                         }
5347
5348                         /* select a new group to run as */
5349                         if (bitnset(M_SPECIFIC_UID, mailer->m_flags))
5350                         {
5351                                 if (mailer->m_gid == NO_GID)
5352                                         RealGid = RunAsGid;
5353                                 else
5354                                         RealGid = mailer->m_gid;
5355                                 if (RunAsUid != 0 &&
5356                                     (RealGid != getgid() ||
5357                                      RealGid != getegid()))
5358                                 {
5359                                         /* Only root can change the gid */
5360                                         syserr("mailfile: insufficient privileges to change gid, RealGid=%d, RunAsUid=%d, gid=%d, egid=%d",
5361                                                (int) RealGid, (int) RunAsUid,
5362                                                (int) getgid(), (int) getegid());
5363                                         RETURN(EX_TEMPFAIL);
5364                                 }
5365                         }
5366                         else if (bitset(S_ISGID, mode))
5367                                 RealGid = stb.st_gid;
5368                         else if (ctladdr != NULL &&
5369                                  ctladdr->q_uid == DefUid &&
5370                                  ctladdr->q_gid == 0)
5371                         {
5372                                 /*
5373                                 **  Special case:  This means it is an
5374                                 **  alias and we should act as DefaultUser.
5375                                 **  See alias()'s comments.
5376                                 */
5377
5378                                 RealGid = DefGid;
5379                                 RealUserName = DefUser;
5380                         }
5381                         else if (ctladdr != NULL && ctladdr->q_uid != 0)
5382                                 RealGid = ctladdr->q_gid;
5383                         else if (mailer != NULL && mailer->m_gid != NO_GID)
5384                                 RealGid = mailer->m_gid;
5385                         else
5386                                 RealGid = DefGid;
5387                 }
5388
5389                 /* last ditch */
5390                 if (!bitset(SFF_ROOTOK, sfflags))
5391                 {
5392                         if (RealUid == 0)
5393                                 RealUid = DefUid;
5394                         if (RealGid == 0)
5395                                 RealGid = DefGid;
5396                 }
5397
5398                 /* set group id list (needs /etc/group access) */
5399                 if (RealUserName != NULL && !DontInitGroups)
5400                 {
5401                         if (initgroups(RealUserName, RealGid) == -1 && suidwarn)
5402                         {
5403                                 syserr("mailfile: initgroups(%s, %d) failed",
5404                                         RealUserName, RealGid);
5405                                 RETURN(EX_TEMPFAIL);
5406                         }
5407                 }
5408                 else
5409                 {
5410                         GIDSET_T gidset[1];
5411
5412                         gidset[0] = RealGid;
5413                         if (setgroups(1, gidset) == -1 && suidwarn)
5414                         {
5415                                 syserr("mailfile: setgroups() failed");
5416                                 RETURN(EX_TEMPFAIL);
5417                         }
5418                 }
5419
5420                 /*
5421                 **  If you have a safe environment, go into it.
5422                 */
5423
5424                 if (realfile != targetfile)
5425                 {
5426                         char save;
5427
5428                         save = *realfile;
5429                         *realfile = '\0';
5430                         if (tTd(11, 20))
5431                                 sm_dprintf("mailfile: chroot %s\n", targetfile);
5432                         if (chroot(targetfile) < 0)
5433                         {
5434                                 syserr("mailfile: Cannot chroot(%s)",
5435                                        targetfile);
5436                                 RETURN(EX_CANTCREAT);
5437                         }
5438                         *realfile = save;
5439                 }
5440
5441                 if (tTd(11, 40))
5442                         sm_dprintf("mailfile: deliver to %s\n", realfile);
5443
5444                 if (chdir("/") < 0)
5445                 {
5446                         syserr("mailfile: cannot chdir(/)");
5447                         RETURN(EX_CANTCREAT);
5448                 }
5449
5450                 /* now reset the group and user ids */
5451                 endpwent();
5452                 sm_mbdb_terminate();
5453                 if (setgid(RealGid) < 0 && suidwarn)
5454                 {
5455                         syserr("mailfile: setgid(%ld) failed", (long) RealGid);
5456                         RETURN(EX_TEMPFAIL);
5457                 }
5458                 vendor_set_uid(RealUid);
5459                 if (setuid(RealUid) < 0 && suidwarn)
5460                 {
5461                         syserr("mailfile: setuid(%ld) failed", (long) RealUid);
5462                         RETURN(EX_TEMPFAIL);
5463                 }
5464
5465                 if (tTd(11, 2))
5466                         sm_dprintf("mailfile: running as r/euid=%d/%d, r/egid=%d/%d\n",
5467                                 (int) getuid(), (int) geteuid(),
5468                                 (int) getgid(), (int) getegid());
5469
5470
5471                 /* move into some "safe" directory */
5472                 if (mailer->m_execdir != NULL)
5473                 {
5474                         char *q;
5475
5476                         for (p = mailer->m_execdir; p != NULL; p = q)
5477                         {
5478                                 q = strchr(p, ':');
5479                                 if (q != NULL)
5480                                         *q = '\0';
5481                                 expand(p, buf, sizeof(buf), e);
5482                                 if (q != NULL)
5483                                         *q++ = ':';
5484                                 if (tTd(11, 20))
5485                                         sm_dprintf("mailfile: trydir %s\n",
5486                                                    buf);
5487                                 if (buf[0] != '\0' && chdir(buf) >= 0)
5488                                         break;
5489                         }
5490                 }
5491
5492                 /*
5493                 **  Recheck the file after we have assumed the ID of the
5494                 **  delivery user to make sure we can deliver to it as
5495                 **  that user.  This is necessary if sendmail is running
5496                 **  as root and the file is on an NFS mount which treats
5497                 **  root as nobody.
5498                 */
5499
5500 #if HASLSTAT
5501                 if (bitnset(DBS_FILEDELIVERYTOSYMLINK, DontBlameSendmail))
5502                         err = stat(realfile, &stb);
5503                 else
5504                         err = lstat(realfile, &stb);
5505 #else /* HASLSTAT */
5506                 err = stat(realfile, &stb);
5507 #endif /* HASLSTAT */
5508
5509                 if (err < 0)
5510                 {
5511                         stb.st_mode = ST_MODE_NOFILE;
5512                         mode = FileMode;
5513                         oflags |= O_CREAT|O_EXCL;
5514                 }
5515                 else if (bitset(S_IXUSR|S_IXGRP|S_IXOTH, mode) ||
5516                          (!bitnset(DBS_FILEDELIVERYTOHARDLINK,
5517                                    DontBlameSendmail) &&
5518                           stb.st_nlink != 1) ||
5519                          (realfile != targetfile && !S_ISREG(mode)))
5520                         exit(EX_CANTCREAT);
5521                 else
5522                         mode = stb.st_mode;
5523
5524                 if (!bitnset(DBS_FILEDELIVERYTOSYMLINK, DontBlameSendmail))
5525                         sfflags |= SFF_NOSLINK;
5526                 if (!bitnset(DBS_FILEDELIVERYTOHARDLINK, DontBlameSendmail))
5527                         sfflags |= SFF_NOHLINK;
5528                 sfflags &= ~SFF_OPENASROOT;
5529                 f = safefopen(realfile, oflags, mode, sfflags);
5530                 if (f == NULL)
5531                 {
5532                         if (transienterror(errno))
5533                         {
5534                                 usrerr("454 4.3.0 cannot open %s: %s",
5535                                        shortenstring(realfile, MAXSHORTSTR),
5536                                        sm_errstring(errno));
5537                                 RETURN(EX_TEMPFAIL);
5538                         }
5539                         else
5540                         {
5541                                 usrerr("554 5.3.0 cannot open %s: %s",
5542                                        shortenstring(realfile, MAXSHORTSTR),
5543                                        sm_errstring(errno));
5544                                 RETURN(EX_CANTCREAT);
5545                         }
5546                 }
5547                 if (filechanged(realfile, sm_io_getinfo(f, SM_IO_WHAT_FD, NULL),
5548                     &stb))
5549                 {
5550                         syserr("554 5.3.0 file changed after open");
5551                         RETURN(EX_CANTCREAT);
5552                 }
5553                 if (fstat(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL), &stb) < 0)
5554                 {
5555                         syserr("554 5.3.0 cannot fstat %s",
5556                                 sm_errstring(errno));
5557                         RETURN(EX_CANTCREAT);
5558                 }
5559
5560                 curoff = stb.st_size;
5561
5562                 if (ev != NULL)
5563                         sm_clrevent(ev);
5564
5565                 memset(&mcibuf, '\0', sizeof(mcibuf));
5566                 mcibuf.mci_mailer = mailer;
5567                 mcibuf.mci_out = f;
5568                 if (bitnset(M_7BITS, mailer->m_flags))
5569                         mcibuf.mci_flags |= MCIF_7BIT;
5570
5571                 /* clear out per-message flags from connection structure */
5572                 mcibuf.mci_flags &= ~(MCIF_CVT7TO8|MCIF_CVT8TO7);
5573
5574                 if (bitset(EF_HAS8BIT, e->e_flags) &&
5575                     !bitset(EF_DONT_MIME, e->e_flags) &&
5576                     bitnset(M_7BITS, mailer->m_flags))
5577                         mcibuf.mci_flags |= MCIF_CVT8TO7;
5578
5579 #if MIME7TO8
5580                 if (bitnset(M_MAKE8BIT, mailer->m_flags) &&
5581                     !bitset(MCIF_7BIT, mcibuf.mci_flags) &&
5582                     (p = hvalue("Content-Transfer-Encoding", e->e_header)) != NULL &&
5583                     (sm_strcasecmp(p, "quoted-printable") == 0 ||
5584                      sm_strcasecmp(p, "base64") == 0) &&
5585                     (p = hvalue("Content-Type", e->e_header)) != NULL)
5586                 {
5587                         /* may want to convert 7 -> 8 */
5588                         /* XXX should really parse it here -- and use a class XXX */
5589                         if (sm_strncasecmp(p, "text/plain", 10) == 0 &&
5590                             (p[10] == '\0' || p[10] == ' ' || p[10] == ';'))
5591                                 mcibuf.mci_flags |= MCIF_CVT7TO8;
5592                 }
5593 #endif /* MIME7TO8 */
5594
5595                 if (!putfromline(&mcibuf, e) ||
5596                     !(*e->e_puthdr)(&mcibuf, e->e_header, e, M87F_OUTER) ||
5597                     !(*e->e_putbody)(&mcibuf, e, NULL) ||
5598                     !putline("\n", &mcibuf) ||
5599                     (sm_io_flush(f, SM_TIME_DEFAULT) != 0 ||
5600                     (SuperSafe != SAFE_NO &&
5601                      fsync(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL)) < 0) ||
5602                     sm_io_error(f)))
5603                 {
5604                         setstat(EX_IOERR);
5605 #if !NOFTRUNCATE
5606                         (void) ftruncate(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL),
5607                                          curoff);
5608 #endif /* !NOFTRUNCATE */
5609                 }
5610
5611                 /* reset ISUID & ISGID bits for paranoid systems */
5612 #if HASFCHMOD
5613                 (void) fchmod(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL),
5614                               (MODE_T) mode);
5615 #else /* HASFCHMOD */
5616                 (void) chmod(filename, (MODE_T) mode);
5617 #endif /* HASFCHMOD */
5618                 if (sm_io_close(f, SM_TIME_DEFAULT) < 0)
5619                         setstat(EX_IOERR);
5620                 (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
5621                 (void) setuid(RealUid);
5622                 exit(ExitStat);
5623                 /* NOTREACHED */
5624         }
5625         else
5626         {
5627                 /* parent -- wait for exit status */
5628                 int st;
5629
5630                 st = waitfor(pid);
5631                 if (st == -1)
5632                 {
5633                         syserr("mailfile: %s: wait", mailer->m_name);
5634                         return EX_SOFTWARE;
5635                 }
5636                 if (WIFEXITED(st))
5637                 {
5638                         errno = 0;
5639                         return (WEXITSTATUS(st));
5640                 }
5641                 else
5642                 {
5643                         syserr("mailfile: %s: child died on signal %d",
5644                                mailer->m_name, st);
5645                         return EX_UNAVAILABLE;
5646                 }
5647                 /* NOTREACHED */
5648         }
5649         return EX_UNAVAILABLE;  /* avoid compiler warning on IRIX */
5650 }
5651
5652 static void
5653 mailfiletimeout(ignore)
5654         int ignore;
5655 {
5656         /*
5657         **  NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
5658         **      ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
5659         **      DOING.
5660         */
5661
5662         errno = ETIMEDOUT;
5663         longjmp(CtxMailfileTimeout, 1);
5664 }
5665 /*
5666 **  HOSTSIGNATURE -- return the "signature" for a host.
5667 **
5668 **      The signature describes how we are going to send this -- it
5669 **      can be just the hostname (for non-Internet hosts) or can be
5670 **      an ordered list of MX hosts.
5671 **
5672 **      Parameters:
5673 **              m -- the mailer describing this host.
5674 **              host -- the host name.
5675 **
5676 **      Returns:
5677 **              The signature for this host.
5678 **
5679 **      Side Effects:
5680 **              Can tweak the symbol table.
5681 */
5682
5683 #define MAXHOSTSIGNATURE        8192    /* max len of hostsignature */
5684
5685 char *
5686 hostsignature(m, host)
5687         register MAILER *m;
5688         char *host;
5689 {
5690         register char *p;
5691         register STAB *s;
5692         time_t now;
5693 #if NAMED_BIND
5694         char sep = ':';
5695         char prevsep = ':';
5696         int i;
5697         int len;
5698         int nmx;
5699         int hl;
5700         char *hp;
5701         char *endp;
5702         int oldoptions = _res.options;
5703         char *mxhosts[MAXMXHOSTS + 1];
5704         unsigned short mxprefs[MAXMXHOSTS + 1];
5705 #endif /* NAMED_BIND */
5706
5707         if (tTd(17, 3))
5708                 sm_dprintf("hostsignature(%s)\n", host);
5709
5710         /*
5711         **  If local delivery (and not remote), just return a constant.
5712         */
5713
5714         if (bitnset(M_LOCALMAILER, m->m_flags) &&
5715             strcmp(m->m_mailer, "[IPC]") != 0 &&
5716             !(m->m_argv[0] != NULL && strcmp(m->m_argv[0], "TCP") == 0))
5717                 return "localhost";
5718
5719         /* an empty host does not have MX records */
5720         if (*host == '\0')
5721                 return "_empty_";
5722
5723         /*
5724         **  Check to see if this uses IPC -- if not, it can't have MX records.
5725         */
5726
5727         if (strcmp(m->m_mailer, "[IPC]") != 0 ||
5728             CurEnv->e_sendmode == SM_DEFER)
5729         {
5730                 /* just an ordinary mailer or deferred mode */
5731                 return host;
5732         }
5733 #if NETUNIX
5734         else if (m->m_argv[0] != NULL &&
5735                  strcmp(m->m_argv[0], "FILE") == 0)
5736         {
5737                 /* rendezvous in the file system, no MX records */
5738                 return host;
5739         }
5740 #endif /* NETUNIX */
5741
5742         /*
5743         **  Look it up in the symbol table.
5744         */
5745
5746         now = curtime();
5747         s = stab(host, ST_HOSTSIG, ST_ENTER);
5748         if (s->s_hostsig.hs_sig != NULL)
5749         {
5750                 if (s->s_hostsig.hs_exp >= now)
5751                 {
5752                         if (tTd(17, 3))
5753                                 sm_dprintf("hostsignature(): stab(%s) found %s\n", host,
5754                                            s->s_hostsig.hs_sig);
5755                         return s->s_hostsig.hs_sig;
5756                 }
5757
5758                 /* signature is expired: clear it */
5759                 sm_free(s->s_hostsig.hs_sig);
5760                 s->s_hostsig.hs_sig = NULL;
5761         }
5762
5763         /* set default TTL */
5764         s->s_hostsig.hs_exp = now + SM_DEFAULT_TTL;
5765
5766         /*
5767         **  Not already there or expired -- create a signature.
5768         */
5769
5770 #if NAMED_BIND
5771         if (ConfigLevel < 2)
5772                 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH);   /* XXX */
5773
5774         for (hp = host; hp != NULL; hp = endp)
5775         {
5776 #if NETINET6
5777                 if (*hp == '[')
5778                 {
5779                         endp = strchr(hp + 1, ']');
5780                         if (endp != NULL)
5781                                 endp = strpbrk(endp + 1, ":,");
5782                 }
5783                 else
5784                         endp = strpbrk(hp, ":,");
5785 #else /* NETINET6 */
5786                 endp = strpbrk(hp, ":,");
5787 #endif /* NETINET6 */
5788                 if (endp != NULL)
5789                 {
5790                         sep = *endp;
5791                         *endp = '\0';
5792                 }
5793
5794                 if (bitnset(M_NOMX, m->m_flags))
5795                 {
5796                         /* skip MX lookups */
5797                         nmx = 1;
5798                         mxhosts[0] = hp;
5799                 }
5800                 else
5801                 {
5802                         auto int rcode;
5803                         int ttl;
5804
5805                         nmx = getmxrr(hp, mxhosts, mxprefs, true, &rcode, true,
5806                                       &ttl);
5807                         if (nmx <= 0)
5808                         {
5809                                 int save_errno;
5810                                 register MCI *mci;
5811
5812                                 /* update the connection info for this host */
5813                                 save_errno = errno;
5814                                 mci = mci_get(hp, m);
5815                                 mci->mci_errno = save_errno;
5816                                 mci->mci_herrno = h_errno;
5817                                 mci->mci_lastuse = now;
5818                                 if (rcode == EX_NOHOST)
5819                                         mci_setstat(mci, rcode, "5.1.2",
5820                                                     "550 Host unknown");
5821                                 else
5822                                         mci_setstat(mci, rcode, NULL, NULL);
5823
5824                                 /* use the original host name as signature */
5825                                 nmx = 1;
5826                                 mxhosts[0] = hp;
5827                         }
5828                         if (tTd(17, 3))
5829                                 sm_dprintf("hostsignature(): getmxrr() returned %d, mxhosts[0]=%s\n",
5830                                            nmx, mxhosts[0]);
5831
5832                         /*
5833                         **  Set new TTL: we use only one!
5834                         **      We could try to use the minimum instead.
5835                         */
5836
5837                         s->s_hostsig.hs_exp = now + SM_MIN(ttl, SM_DEFAULT_TTL);
5838                 }
5839
5840                 len = 0;
5841                 for (i = 0; i < nmx; i++)
5842                         len += strlen(mxhosts[i]) + 1;
5843                 if (s->s_hostsig.hs_sig != NULL)
5844                         len += strlen(s->s_hostsig.hs_sig) + 1;
5845                 if (len < 0 || len >= MAXHOSTSIGNATURE)
5846                 {
5847                         sm_syslog(LOG_WARNING, NOQID, "hostsignature for host '%s' exceeds maxlen (%d): %d",
5848                                   host, MAXHOSTSIGNATURE, len);
5849                         len = MAXHOSTSIGNATURE;
5850                 }
5851                 p = sm_pmalloc_x(len);
5852                 if (s->s_hostsig.hs_sig != NULL)
5853                 {
5854                         (void) sm_strlcpy(p, s->s_hostsig.hs_sig, len);
5855                         sm_free(s->s_hostsig.hs_sig); /* XXX */
5856                         s->s_hostsig.hs_sig = p;
5857                         hl = strlen(p);
5858                         p += hl;
5859                         *p++ = prevsep;
5860                         len -= hl + 1;
5861                 }
5862                 else
5863                         s->s_hostsig.hs_sig = p;
5864                 for (i = 0; i < nmx; i++)
5865                 {
5866                         hl = strlen(mxhosts[i]);
5867                         if (len - 1 < hl || len <= 1)
5868                         {
5869                                 /* force to drop out of outer loop */
5870                                 len = -1;
5871                                 break;
5872                         }
5873                         if (i != 0)
5874                         {
5875                                 if (mxprefs[i] == mxprefs[i - 1])
5876                                         *p++ = ',';
5877                                 else
5878                                         *p++ = ':';
5879                                 len--;
5880                         }
5881                         (void) sm_strlcpy(p, mxhosts[i], len);
5882                         p += hl;
5883                         len -= hl;
5884                 }
5885
5886                 /*
5887                 **  break out of loop if len exceeded MAXHOSTSIGNATURE
5888                 **  because we won't have more space for further hosts
5889                 **  anyway (separated by : in the .cf file).
5890                 */
5891
5892                 if (len < 0)
5893                         break;
5894                 if (endp != NULL)
5895                         *endp++ = sep;
5896                 prevsep = sep;
5897         }
5898         makelower(s->s_hostsig.hs_sig);
5899         if (ConfigLevel < 2)
5900                 _res.options = oldoptions;
5901 #else /* NAMED_BIND */
5902         /* not using BIND -- the signature is just the host name */
5903         /*
5904         **  'host' points to storage that will be freed after we are
5905         **  done processing the current envelope, so we copy it.
5906         */
5907         s->s_hostsig.hs_sig = sm_pstrdup_x(host);
5908 #endif /* NAMED_BIND */
5909         if (tTd(17, 1))
5910                 sm_dprintf("hostsignature(%s) = %s\n", host, s->s_hostsig.hs_sig);
5911         return s->s_hostsig.hs_sig;
5912 }
5913 /*
5914 **  PARSE_HOSTSIGNATURE -- parse the "signature" and return MX host array.
5915 **
5916 **      The signature describes how we are going to send this -- it
5917 **      can be just the hostname (for non-Internet hosts) or can be
5918 **      an ordered list of MX hosts which must be randomized for equal
5919 **      MX preference values.
5920 **
5921 **      Parameters:
5922 **              sig -- the host signature.
5923 **              mxhosts -- array to populate.
5924 **              mailer -- mailer.
5925 **
5926 **      Returns:
5927 **              The number of hosts inserted into mxhosts array.
5928 **
5929 **      Side Effects:
5930 **              Randomizes equal MX preference hosts in mxhosts.
5931 */
5932
5933 static int
5934 parse_hostsignature(sig, mxhosts, mailer)
5935         char *sig;
5936         char **mxhosts;
5937         MAILER *mailer;
5938 {
5939         unsigned short curpref = 0;
5940         int nmx = 0, i, j;      /* NOTE: i, j, and nmx must have same type */
5941         char *hp, *endp;
5942         unsigned short prefer[MAXMXHOSTS];
5943         long rndm[MAXMXHOSTS];
5944
5945         for (hp = sig; hp != NULL; hp = endp)
5946         {
5947                 char sep = ':';
5948
5949 #if NETINET6
5950                 if (*hp == '[')
5951                 {
5952                         endp = strchr(hp + 1, ']');
5953                         if (endp != NULL)
5954                                 endp = strpbrk(endp + 1, ":,");
5955                 }
5956                 else
5957                         endp = strpbrk(hp, ":,");
5958 #else /* NETINET6 */
5959                 endp = strpbrk(hp, ":,");
5960 #endif /* NETINET6 */
5961                 if (endp != NULL)
5962                 {
5963                         sep = *endp;
5964                         *endp = '\0';
5965                 }
5966
5967                 mxhosts[nmx] = hp;
5968                 prefer[nmx] = curpref;
5969                 if (mci_match(hp, mailer))
5970                         rndm[nmx] = 0;
5971                 else
5972                         rndm[nmx] = get_random();
5973
5974                 if (endp != NULL)
5975                 {
5976                         /*
5977                         **  Since we don't have the original MX prefs,
5978                         **  make our own.  If the separator is a ':', that
5979                         **  means the preference for the next host will be
5980                         **  higher than this one, so simply increment curpref.
5981                         */
5982
5983                         if (sep == ':')
5984                                 curpref++;
5985
5986                         *endp++ = sep;
5987                 }
5988                 if (++nmx >= MAXMXHOSTS)
5989                         break;
5990         }
5991
5992         /* sort the records using the random factor for equal preferences */
5993         for (i = 0; i < nmx; i++)
5994         {
5995                 for (j = i + 1; j < nmx; j++)
5996                 {
5997                         /*
5998                         **  List is already sorted by MX preference, only
5999                         **  need to look for equal preference MX records
6000                         */
6001
6002                         if (prefer[i] < prefer[j])
6003                                 break;
6004
6005                         if (prefer[i] > prefer[j] ||
6006                             (prefer[i] == prefer[j] && rndm[i] > rndm[j]))
6007                         {
6008                                 register unsigned short tempp;
6009                                 register long tempr;
6010                                 register char *temp1;
6011
6012                                 tempp = prefer[i];
6013                                 prefer[i] = prefer[j];
6014                                 prefer[j] = tempp;
6015                                 temp1 = mxhosts[i];
6016                                 mxhosts[i] = mxhosts[j];
6017                                 mxhosts[j] = temp1;
6018                                 tempr = rndm[i];
6019                                 rndm[i] = rndm[j];
6020                                 rndm[j] = tempr;
6021                         }
6022                 }
6023         }
6024         return nmx;
6025 }
6026
6027 # if STARTTLS
6028 static SSL_CTX  *clt_ctx = NULL;
6029 static bool     tls_ok_clt = true;
6030
6031 /*
6032 **  SETCLTTLS -- client side TLS: allow/disallow.
6033 **
6034 **      Parameters:
6035 **              tls_ok -- should tls be done?
6036 **
6037 **      Returns:
6038 **              none.
6039 **
6040 **      Side Effects:
6041 **              sets tls_ok_clt (static variable in this module)
6042 */
6043
6044 void
6045 setclttls(tls_ok)
6046         bool tls_ok;
6047 {
6048         tls_ok_clt = tls_ok;
6049         return;
6050 }
6051 /*
6052 **  INITCLTTLS -- initialize client side TLS
6053 **
6054 **      Parameters:
6055 **              tls_ok -- should tls initialization be done?
6056 **
6057 **      Returns:
6058 **              succeeded?
6059 **
6060 **      Side Effects:
6061 **              sets tls_ok_clt (static variable in this module)
6062 */
6063
6064 bool
6065 initclttls(tls_ok)
6066         bool tls_ok;
6067 {
6068         if (!tls_ok_clt)
6069                 return false;
6070         tls_ok_clt = tls_ok;
6071         if (!tls_ok_clt)
6072                 return false;
6073         if (clt_ctx != NULL)
6074                 return true;    /* already done */
6075         tls_ok_clt = inittls(&clt_ctx, TLS_I_CLT, false, CltCertFile,
6076                              CltKeyFile, CACertPath, CACertFile, DHParams);
6077         return tls_ok_clt;
6078 }
6079
6080 /*
6081 **  STARTTLS -- try to start secure connection (client side)
6082 **
6083 **      Parameters:
6084 **              m -- the mailer.
6085 **              mci -- the mailer connection info.
6086 **              e -- the envelope.
6087 **
6088 **      Returns:
6089 **              success?
6090 **              (maybe this should be some other code than EX_
6091 **              that denotes which stage failed.)
6092 */
6093
6094 static int
6095 starttls(m, mci, e)
6096         MAILER *m;
6097         MCI *mci;
6098         ENVELOPE *e;
6099 {
6100         int smtpresult;
6101         int result = 0;
6102         int rfd, wfd;
6103         SSL *clt_ssl = NULL;
6104         time_t tlsstart;
6105
6106         if (clt_ctx == NULL && !initclttls(true))
6107                 return EX_TEMPFAIL;
6108         smtpmessage("STARTTLS", m, mci);
6109
6110         /* get the reply */
6111         smtpresult = reply(m, mci, e, TimeOuts.to_starttls, NULL, NULL,
6112                         XS_STARTTLS);
6113
6114         /* check return code from server */
6115         if (REPLYTYPE(smtpresult) == 4)
6116                 return EX_TEMPFAIL;
6117         if (smtpresult == 501)
6118                 return EX_USAGE;
6119         if (smtpresult == -1)
6120                 return smtpresult;
6121
6122         /* not an expected reply but we have to deal with it */
6123         if (REPLYTYPE(smtpresult) == 5)
6124                 return EX_UNAVAILABLE;
6125         if (smtpresult != 220)
6126                 return EX_PROTOCOL;
6127
6128         if (LogLevel > 13)
6129                 sm_syslog(LOG_INFO, NOQID, "STARTTLS=client, start=ok");
6130
6131         /* start connection */
6132         if ((clt_ssl = SSL_new(clt_ctx)) == NULL)
6133         {
6134                 if (LogLevel > 5)
6135                 {
6136                         sm_syslog(LOG_ERR, NOQID,
6137                                   "STARTTLS=client, error: SSL_new failed");
6138                         if (LogLevel > 9)
6139                                 tlslogerr("client");
6140                 }
6141                 return EX_SOFTWARE;
6142         }
6143
6144         rfd = sm_io_getinfo(mci->mci_in, SM_IO_WHAT_FD, NULL);
6145         wfd = sm_io_getinfo(mci->mci_out, SM_IO_WHAT_FD, NULL);
6146
6147         /* SSL_clear(clt_ssl); ? */
6148         if (rfd < 0 || wfd < 0 ||
6149             (result = SSL_set_rfd(clt_ssl, rfd)) != 1 ||
6150             (result = SSL_set_wfd(clt_ssl, wfd)) != 1)
6151         {
6152                 if (LogLevel > 5)
6153                 {
6154                         sm_syslog(LOG_ERR, NOQID,
6155                                   "STARTTLS=client, error: SSL_set_xfd failed=%d",
6156                                   result);
6157                         if (LogLevel > 9)
6158                                 tlslogerr("client");
6159                 }
6160                 return EX_SOFTWARE;
6161         }
6162         SSL_set_connect_state(clt_ssl);
6163         tlsstart = curtime();
6164
6165 ssl_retry:
6166         if ((result = SSL_connect(clt_ssl)) <= 0)
6167         {
6168                 int i, ssl_err;
6169
6170                 ssl_err = SSL_get_error(clt_ssl, result);
6171                 i = tls_retry(clt_ssl, rfd, wfd, tlsstart,
6172                         TimeOuts.to_starttls, ssl_err, "client");
6173                 if (i > 0)
6174                         goto ssl_retry;
6175
6176                 if (LogLevel > 5)
6177                 {
6178                         sm_syslog(LOG_WARNING, NOQID,
6179                                   "STARTTLS=client, error: connect failed=%d, SSL_error=%d, errno=%d, retry=%d",
6180                                   result, ssl_err, errno, i);
6181                         if (LogLevel > 8)
6182                                 tlslogerr("client");
6183                 }
6184
6185                 SSL_free(clt_ssl);
6186                 clt_ssl = NULL;
6187                 return EX_SOFTWARE;
6188         }
6189         mci->mci_ssl = clt_ssl;
6190         result = tls_get_info(mci->mci_ssl, false, mci->mci_host,
6191                               &mci->mci_macro, true);
6192
6193         /* switch to use TLS... */
6194         if (sfdctls(&mci->mci_in, &mci->mci_out, mci->mci_ssl) == 0)
6195                 return EX_OK;
6196
6197         /* failure */
6198         SSL_free(clt_ssl);
6199         clt_ssl = NULL;
6200         return EX_SOFTWARE;
6201 }
6202 /*
6203 **  ENDTLSCLT -- shutdown secure connection (client side)
6204 **
6205 **      Parameters:
6206 **              mci -- the mailer connection info.
6207 **
6208 **      Returns:
6209 **              success?
6210 */
6211
6212 static int
6213 endtlsclt(mci)
6214         MCI *mci;
6215 {
6216         int r;
6217
6218         if (!bitset(MCIF_TLSACT, mci->mci_flags))
6219                 return EX_OK;
6220         r = endtls(mci->mci_ssl, "client");
6221         mci->mci_flags &= ~MCIF_TLSACT;
6222         return r;
6223 }
6224 # endif /* STARTTLS */
6225 # if STARTTLS || SASL
6226 /*
6227 **  ISCLTFLGSET -- check whether client flag is set.
6228 **
6229 **      Parameters:
6230 **              e -- envelope.
6231 **              flag -- flag to check in {client_flags}
6232 **
6233 **      Returns:
6234 **              true iff flag is set.
6235 */
6236
6237 static bool
6238 iscltflgset(e, flag)
6239         ENVELOPE *e;
6240         int flag;
6241 {
6242         char *p;
6243
6244         p = macvalue(macid("{client_flags}"), e);
6245         if (p == NULL)
6246                 return false;
6247         for (; *p != '\0'; p++)
6248         {
6249                 /* look for just this one flag */
6250                 if (*p == (char) flag)
6251                         return true;
6252         }
6253         return false;
6254 }
6255 # endif /* STARTTLS || SASL */