contrib/sendmail/src/deliver.c

   1 /*
   2  * Copyright (c) 1998-2010, 2012 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 8.1028 2013/01/02 18:57:42 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 #  include <openssl/err.h>
  41 static int      starttls __P((MAILER *, MCI *, ENVELOPE *));
  42 static int      endtlsclt __P((MCI *));
  43 #endif /* STARTTLS */
  44 # if STARTTLS || SASL
  45 static bool     iscltflgset __P((ENVELOPE *, int));
  46 # endif /* STARTTLS || SASL */
  47
  48 /*
  49 **  SENDALL -- actually send all the messages.
  50 **
  51 **      Parameters:
  52 **              e -- the envelope to send.
  53 **              mode -- the delivery mode to use.  If SM_DEFAULT, use
  54 **                      the current e->e_sendmode.
  55 **
  56 **      Returns:
  57 **              none.
  58 **
  59 **      Side Effects:
  60 **              Scans the send lists and sends everything it finds.
  61 **              Delivers any appropriate error messages.
  62 **              If we are running in a non-interactive mode, takes the
  63 **                      appropriate action.
  64 */
  65
  66 void
  67 sendall(e, mode)
  68         ENVELOPE *e;
  69         int mode;
  70 {
  71         register ADDRESS *q;
  72         char *owner;
  73         int otherowners;
  74         int save_errno;
  75         register ENVELOPE *ee;
  76         ENVELOPE *splitenv = NULL;
  77         int oldverbose = Verbose;
  78         bool somedeliveries = false, expensive = false;
  79         pid_t pid;
  80
  81         /*
  82         **  If this message is to be discarded, don't bother sending
  83         **  the message at all.
  84         */
  85
  86         if (bitset(EF_DISCARD, e->e_flags))
  87         {
  88                 if (tTd(13, 1))
  89                         sm_dprintf("sendall: discarding id %s\n", e->e_id);
  90                 e->e_flags |= EF_CLRQUEUE;
  91                 if (LogLevel > 9)
  92                         logundelrcpts(e, "discarded", 9, true);
  93                 else if (LogLevel > 4)
  94                         sm_syslog(LOG_INFO, e->e_id, "discarded");
  95                 markstats(e, NULL, STATS_REJECT);
  96                 return;
  97         }
  98
  99         /*
 100         **  If we have had global, fatal errors, don't bother sending
 101         **  the message at all if we are in SMTP mode.  Local errors
 102         **  (e.g., a single address failing) will still cause the other
 103         **  addresses to be sent.
 104         */
 105
 106         if (bitset(EF_FATALERRS, e->e_flags) &&
 107             (OpMode == MD_SMTP || OpMode == MD_DAEMON))
 108         {
 109                 e->e_flags |= EF_CLRQUEUE;
 110                 return;
 111         }
 112
 113         /* determine actual delivery mode */
 114         if (mode == SM_DEFAULT)
 115         {
 116                 mode = e->e_sendmode;
 117                 if (mode != SM_VERIFY && mode != SM_DEFER &&
 118                     shouldqueue(e->e_msgpriority, e->e_ctime))
 119                         mode = SM_QUEUE;
 120         }
 121
 122         if (tTd(13, 1))
 123         {
 124                 sm_dprintf("\n===== SENDALL: mode %c, id %s, e_from ",
 125                         mode, e->e_id);
 126                 printaddr(sm_debug_file(), &e->e_from, false);
 127                 sm_dprintf("\te_flags = ");
 128                 printenvflags(e);
 129                 sm_dprintf("sendqueue:\n");
 130                 printaddr(sm_debug_file(), e->e_sendqueue, true);
 131         }
 132
 133         /*
 134         **  Do any preprocessing necessary for the mode we are running.
 135         **      Check to make sure the hop count is reasonable.
 136         **      Delete sends to the sender in mailing lists.
 137         */
 138
 139         CurEnv = e;
 140         if (tTd(62, 1))
 141                 checkfds(NULL);
 142
 143         if (e->e_hopcount > MaxHopCount)
 144         {
 145                 char *recip;
 146
 147                 if (e->e_sendqueue != NULL &&
 148                     e->e_sendqueue->q_paddr != NULL)
 149                         recip = e->e_sendqueue->q_paddr;
 150                 else
 151                         recip = "(nobody)";
 152
 153                 errno = 0;
 154                 queueup(e, WILL_BE_QUEUED(mode), false);
 155                 e->e_flags |= EF_FATALERRS|EF_PM_NOTIFY|EF_CLRQUEUE;
 156                 ExitStat = EX_UNAVAILABLE;
 157                 syserr("554 5.4.6 Too many hops %d (%d max): from %s via %s, to %s",
 158                        e->e_hopcount, MaxHopCount, e->e_from.q_paddr,
 159                        RealHostName == NULL ? "localhost" : RealHostName,
 160                        recip);
 161                 for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 162                 {
 163                         if (QS_IS_DEAD(q->q_state))
 164                                 continue;
 165                         q->q_state = QS_BADADDR;
 166                         q->q_status = "5.4.6";
 167                         q->q_rstatus = "554 5.4.6 Too many hops";
 168                 }
 169                 return;
 170         }
 171
 172         /*
 173         **  Do sender deletion.
 174         **
 175         **      If the sender should be queued up, skip this.
 176         **      This can happen if the name server is hosed when you
 177         **      are trying to send mail.  The result is that the sender
 178         **      is instantiated in the queue as a recipient.
 179         */
 180
 181         if (!bitset(EF_METOO, e->e_flags) &&
 182             !QS_IS_QUEUEUP(e->e_from.q_state))
 183         {
 184                 if (tTd(13, 5))
 185                 {
 186                         sm_dprintf("sendall: QS_SENDER ");
 187                         printaddr(sm_debug_file(), &e->e_from, false);
 188                 }
 189                 e->e_from.q_state = QS_SENDER;
 190                 (void) recipient(&e->e_from, &e->e_sendqueue, 0, e);
 191         }
 192
 193         /*
 194         **  Handle alias owners.
 195         **
 196         **      We scan up the q_alias chain looking for owners.
 197         **      We discard owners that are the same as the return path.
 198         */
 199
 200         for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 201         {
 202                 register struct address *a;
 203
 204                 for (a = q; a != NULL && a->q_owner == NULL; a = a->q_alias)
 205                         continue;
 206                 if (a != NULL)
 207                         q->q_owner = a->q_owner;
 208
 209                 if (q->q_owner != NULL &&
 210                     !QS_IS_DEAD(q->q_state) &&
 211                     strcmp(q->q_owner, e->e_from.q_paddr) == 0)
 212                         q->q_owner = NULL;
 213         }
 214
 215         if (tTd(13, 25))
 216         {
 217                 sm_dprintf("\nAfter first owner pass, sendq =\n");
 218                 printaddr(sm_debug_file(), e->e_sendqueue, true);
 219         }
 220
 221         owner = "";
 222         otherowners = 1;
 223         while (owner != NULL && otherowners > 0)
 224         {
 225                 if (tTd(13, 28))
 226                         sm_dprintf("owner = \"%s\", otherowners = %d\n",
 227                                    owner, otherowners);
 228                 owner = NULL;
 229                 otherowners = bitset(EF_SENDRECEIPT, e->e_flags) ? 1 : 0;
 230
 231                 for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 232                 {
 233                         if (tTd(13, 30))
 234                         {
 235                                 sm_dprintf("Checking ");
 236                                 printaddr(sm_debug_file(), q, false);
 237                         }
 238                         if (QS_IS_DEAD(q->q_state))
 239                         {
 240                                 if (tTd(13, 30))
 241                                         sm_dprintf("    ... QS_IS_DEAD\n");
 242                                 continue;
 243                         }
 244                         if (tTd(13, 29) && !tTd(13, 30))
 245                         {
 246                                 sm_dprintf("Checking ");
 247                                 printaddr(sm_debug_file(), q, false);
 248                         }
 249
 250                         if (q->q_owner != NULL)
 251                         {
 252                                 if (owner == NULL)
 253                                 {
 254                                         if (tTd(13, 40))
 255                                                 sm_dprintf("    ... First owner = \"%s\"\n",
 256                                                            q->q_owner);
 257                                         owner = q->q_owner;
 258                                 }
 259                                 else if (owner != q->q_owner)
 260                                 {
 261                                         if (strcmp(owner, q->q_owner) == 0)
 262                                         {
 263                                                 if (tTd(13, 40))
 264                                                         sm_dprintf("    ... Same owner = \"%s\"\n",
 265                                                                    owner);
 266
 267                                                 /* make future comparisons cheap */
 268                                                 q->q_owner = owner;
 269                                         }
 270                                         else
 271                                         {
 272                                                 if (tTd(13, 40))
 273                                                         sm_dprintf("    ... Another owner \"%s\"\n",
 274                                                                    q->q_owner);
 275                                                 otherowners++;
 276                                         }
 277                                         owner = q->q_owner;
 278                                 }
 279                                 else if (tTd(13, 40))
 280                                         sm_dprintf("    ... Same owner = \"%s\"\n",
 281                                                    owner);
 282                         }
 283                         else
 284                         {
 285                                 if (tTd(13, 40))
 286                                         sm_dprintf("    ... Null owner\n");
 287                                 otherowners++;
 288                         }
 289
 290                         if (QS_IS_BADADDR(q->q_state))
 291                         {
 292                                 if (tTd(13, 30))
 293                                         sm_dprintf("    ... QS_IS_BADADDR\n");
 294                                 continue;
 295                         }
 296
 297                         if (QS_IS_QUEUEUP(q->q_state))
 298                         {
 299                                 MAILER *m = q->q_mailer;
 300
 301                                 /*
 302                                 **  If we have temporary address failures
 303                                 **  (e.g., dns failure) and a fallback MX is
 304                                 **  set, send directly to the fallback MX host.
 305                                 */
 306
 307                                 if (FallbackMX != NULL &&
 308                                     !wordinclass(FallbackMX, 'w') &&
 309                                     mode != SM_VERIFY &&
 310                                     !bitnset(M_NOMX, m->m_flags) &&
 311                                     strcmp(m->m_mailer, "[IPC]") == 0 &&
 312                                     m->m_argv[0] != NULL &&
 313                                     strcmp(m->m_argv[0], "TCP") == 0)
 314                                 {
 315                                         int len;
 316                                         char *p;
 317
 318                                         if (tTd(13, 30))
 319                                                 sm_dprintf("    ... FallbackMX\n");
 320
 321                                         len = strlen(FallbackMX) + 1;
 322                                         p = sm_rpool_malloc_x(e->e_rpool, len);
 323                                         (void) sm_strlcpy(p, FallbackMX, len);
 324                                         q->q_state = QS_OK;
 325                                         q->q_host = p;
 326                                 }
 327                                 else
 328                                 {
 329                                         if (tTd(13, 30))
 330                                                 sm_dprintf("    ... QS_IS_QUEUEUP\n");
 331                                         continue;
 332                                 }
 333                         }
 334
 335                         /*
 336                         **  If this mailer is expensive, and if we don't
 337                         **  want to make connections now, just mark these
 338                         **  addresses and return.  This is useful if we
 339                         **  want to batch connections to reduce load.  This
 340                         **  will cause the messages to be queued up, and a
 341                         **  daemon will come along to send the messages later.
 342                         */
 343
 344                         if (NoConnect && !Verbose &&
 345                             bitnset(M_EXPENSIVE, q->q_mailer->m_flags))
 346                         {
 347                                 if (tTd(13, 30))
 348                                         sm_dprintf("    ... expensive\n");
 349                                 q->q_state = QS_QUEUEUP;
 350                                 expensive = true;
 351                         }
 352                         else if (bitnset(M_HOLD, q->q_mailer->m_flags) &&
 353                                  QueueLimitId == NULL &&
 354                                  QueueLimitSender == NULL &&
 355                                  QueueLimitRecipient == NULL)
 356                         {
 357                                 if (tTd(13, 30))
 358                                         sm_dprintf("    ... hold\n");
 359                                 q->q_state = QS_QUEUEUP;
 360                                 expensive = true;
 361                         }
 362                         else if (QueueMode != QM_QUARANTINE &&
 363                                  e->e_quarmsg != NULL)
 364                         {
 365                                 if (tTd(13, 30))
 366                                         sm_dprintf("    ... quarantine: %s\n",
 367                                                    e->e_quarmsg);
 368                                 q->q_state = QS_QUEUEUP;
 369                                 expensive = true;
 370                         }
 371                         else
 372                         {
 373                                 if (tTd(13, 30))
 374                                         sm_dprintf("    ... deliverable\n");
 375                                 somedeliveries = true;
 376                         }
 377                 }
 378
 379                 if (owner != NULL && otherowners > 0)
 380                 {
 381                         /*
 382                         **  Split this envelope into two.
 383                         */
 384
 385                         ee = (ENVELOPE *) sm_rpool_malloc_x(e->e_rpool,
 386                                                             sizeof(*ee));
 387                         STRUCTCOPY(*e, *ee);
 388                         ee->e_message = NULL;
 389                         ee->e_id = NULL;
 390                         assign_queueid(ee);
 391
 392                         if (tTd(13, 1))
 393                                 sm_dprintf("sendall: split %s into %s, owner = \"%s\", otherowners = %d\n",
 394                                            e->e_id, ee->e_id, owner,
 395                                            otherowners);
 396
 397                         ee->e_header = copyheader(e->e_header, ee->e_rpool);
 398                         ee->e_sendqueue = copyqueue(e->e_sendqueue,
 399                                                     ee->e_rpool);
 400                         ee->e_errorqueue = copyqueue(e->e_errorqueue,
 401                                                      ee->e_rpool);
 402                         ee->e_flags = e->e_flags & ~(EF_INQUEUE|EF_CLRQUEUE|EF_FATALERRS|EF_SENDRECEIPT|EF_RET_PARAM);
 403                         ee->e_flags |= EF_NORECEIPT;
 404                         setsender(owner, ee, NULL, '\0', true);
 405                         if (tTd(13, 5))
 406                         {
 407                                 sm_dprintf("sendall(split): QS_SENDER ");
 408                                 printaddr(sm_debug_file(), &ee->e_from, false);
 409                         }
 410                         ee->e_from.q_state = QS_SENDER;
 411                         ee->e_dfp = NULL;
 412                         ee->e_lockfp = NULL;
 413                         ee->e_xfp = NULL;
 414                         ee->e_qgrp = e->e_qgrp;
 415                         ee->e_qdir = e->e_qdir;
 416                         ee->e_errormode = EM_MAIL;
 417                         ee->e_sibling = splitenv;
 418                         ee->e_statmsg = NULL;
 419                         if (e->e_quarmsg != NULL)
 420                                 ee->e_quarmsg = sm_rpool_strdup_x(ee->e_rpool,
 421                                                                   e->e_quarmsg);
 422                         splitenv = ee;
 423
 424                         for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 425                         {
 426                                 if (q->q_owner == owner)
 427                                 {
 428                                         q->q_state = QS_CLONED;
 429                                         if (tTd(13, 6))
 430                                                 sm_dprintf("\t... stripping %s from original envelope\n",
 431                                                            q->q_paddr);
 432                                 }
 433                         }
 434                         for (q = ee->e_sendqueue; q != NULL; q = q->q_next)
 435                         {
 436                                 if (q->q_owner != owner)
 437                                 {
 438                                         q->q_state = QS_CLONED;
 439                                         if (tTd(13, 6))
 440                                                 sm_dprintf("\t... dropping %s from cloned envelope\n",
 441                                                            q->q_paddr);
 442                                 }
 443                                 else
 444                                 {
 445                                         /* clear DSN parameters */
 446                                         q->q_flags &= ~(QHASNOTIFY|Q_PINGFLAGS);
 447                                         q->q_flags |= DefaultNotify & ~QPINGONSUCCESS;
 448                                         if (tTd(13, 6))
 449                                                 sm_dprintf("\t... moving %s to cloned envelope\n",
 450                                                            q->q_paddr);
 451                                 }
 452                         }
 453
 454                         if (mode != SM_VERIFY && bitset(EF_HAS_DF, e->e_flags))
 455                                 dup_queue_file(e, ee, DATAFL_LETTER);
 456
 457                         /*
 458                         **  Give the split envelope access to the parent
 459                         **  transcript file for errors obtained while
 460                         **  processing the recipients (done before the
 461                         **  envelope splitting).
 462                         */
 463
 464                         if (e->e_xfp != NULL)
 465                                 ee->e_xfp = sm_io_dup(e->e_xfp);
 466
 467                         /* failed to dup e->e_xfp, start a new transcript */
 468                         if (ee->e_xfp == NULL)
 469                                 openxscript(ee);
 470
 471                         if (mode != SM_VERIFY && LogLevel > 4)
 472                                 sm_syslog(LOG_INFO, e->e_id,
 473                                           "%s: clone: owner=%s",
 474                                           ee->e_id, owner);
 475                 }
 476         }
 477
 478         if (owner != NULL)
 479         {
 480                 setsender(owner, e, NULL, '\0', true);
 481                 if (tTd(13, 5))
 482                 {
 483                         sm_dprintf("sendall(owner): QS_SENDER ");
 484                         printaddr(sm_debug_file(), &e->e_from, false);
 485                 }
 486                 e->e_from.q_state = QS_SENDER;
 487                 e->e_errormode = EM_MAIL;
 488                 e->e_flags |= EF_NORECEIPT;
 489                 e->e_flags &= ~EF_FATALERRS;
 490         }
 491
 492         /* if nothing to be delivered, just queue up everything */
 493         if (!somedeliveries && !WILL_BE_QUEUED(mode) &&
 494             mode != SM_VERIFY)
 495         {
 496                 time_t now;
 497
 498                 if (tTd(13, 29))
 499                         sm_dprintf("No deliveries: auto-queueing\n");
 500                 mode = SM_QUEUE;
 501                 now = curtime();
 502
 503                 /* treat this as a delivery in terms of counting tries */
 504                 e->e_dtime = now;
 505                 if (!expensive)
 506                         e->e_ntries++;
 507                 for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 508                 {
 509                         ee->e_dtime = now;
 510                         if (!expensive)
 511                                 ee->e_ntries++;
 512                 }
 513         }
 514
 515         if ((WILL_BE_QUEUED(mode) || mode == SM_FORK ||
 516              (mode != SM_VERIFY &&
 517               (SuperSafe == SAFE_REALLY ||
 518                SuperSafe == SAFE_REALLY_POSTMILTER))) &&
 519             (!bitset(EF_INQUEUE, e->e_flags) || splitenv != NULL))
 520         {
 521                 bool msync;
 522
 523                 /*
 524                 **  Be sure everything is instantiated in the queue.
 525                 **  Split envelopes first in case the machine crashes.
 526                 **  If the original were done first, we may lose
 527                 **  recipients.
 528                 */
 529
 530 #if !HASFLOCK
 531                 msync = false;
 532 #else /* !HASFLOCK */
 533                 msync = mode == SM_FORK;
 534 #endif /* !HASFLOCK */
 535
 536                 for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 537                         queueup(ee, WILL_BE_QUEUED(mode), msync);
 538                 queueup(e, WILL_BE_QUEUED(mode), msync);
 539         }
 540
 541         if (tTd(62, 10))
 542                 checkfds("after envelope splitting");
 543
 544         /*
 545         **  If we belong in background, fork now.
 546         */
 547
 548         if (tTd(13, 20))
 549         {
 550                 sm_dprintf("sendall: final mode = %c\n", mode);
 551                 if (tTd(13, 21))
 552                 {
 553                         sm_dprintf("\n================ Final Send Queue(s) =====================\n");
 554                         sm_dprintf("\n  *** Envelope %s, e_from=%s ***\n",
 555                                    e->e_id, e->e_from.q_paddr);
 556                         printaddr(sm_debug_file(), e->e_sendqueue, true);
 557                         for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 558                         {
 559                                 sm_dprintf("\n  *** Envelope %s, e_from=%s ***\n",
 560                                            ee->e_id, ee->e_from.q_paddr);
 561                                 printaddr(sm_debug_file(), ee->e_sendqueue, true);
 562                         }
 563                         sm_dprintf("==========================================================\n\n");
 564                 }
 565         }
 566         switch (mode)
 567         {
 568           case SM_VERIFY:
 569                 Verbose = 2;
 570                 break;
 571
 572           case SM_QUEUE:
 573           case SM_DEFER:
 574 #if HASFLOCK
 575   queueonly:
 576 #endif /* HASFLOCK */
 577                 if (e->e_nrcpts > 0)
 578                         e->e_flags |= EF_INQUEUE;
 579                 (void) dropenvelope(e, splitenv != NULL, true);
 580                 for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 581                 {
 582                         if (ee->e_nrcpts > 0)
 583                                 ee->e_flags |= EF_INQUEUE;
 584                         (void) dropenvelope(ee, false, true);
 585                 }
 586                 return;
 587
 588           case SM_FORK:
 589                 if (e->e_xfp != NULL)
 590                         (void) sm_io_flush(e->e_xfp, SM_TIME_DEFAULT);
 591
 592 #if !HASFLOCK
 593                 /*
 594                 **  Since fcntl locking has the interesting semantic that
 595                 **  the lock is owned by a process, not by an open file
 596                 **  descriptor, we have to flush this to the queue, and
 597                 **  then restart from scratch in the child.
 598                 */
 599
 600                 {
 601                         /* save id for future use */
 602                         char *qid = e->e_id;
 603
 604                         /* now drop the envelope in the parent */
 605                         e->e_flags |= EF_INQUEUE;
 606                         (void) dropenvelope(e, splitenv != NULL, false);
 607
 608                         /* arrange to reacquire lock after fork */
 609                         e->e_id = qid;
 610                 }
 611
 612                 for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 613                 {
 614                         /* save id for future use */
 615                         char *qid = ee->e_id;
 616
 617                         /* drop envelope in parent */
 618                         ee->e_flags |= EF_INQUEUE;
 619                         (void) dropenvelope(ee, false, false);
 620
 621                         /* and save qid for reacquisition */
 622                         ee->e_id = qid;
 623                 }
 624
 625 #endif /* !HASFLOCK */
 626
 627                 /*
 628                 **  Since the delivery may happen in a child and the parent
 629                 **  does not wait, the parent may close the maps thereby
 630                 **  removing any shared memory used by the map.  Therefore,
 631                 **  close the maps now so the child will dynamically open
 632                 **  them if necessary.
 633                 */
 634
 635                 closemaps(false);
 636
 637                 pid = fork();
 638                 if (pid < 0)
 639                 {
 640                         syserr("deliver: fork 1");
 641 #if HASFLOCK
 642                         goto queueonly;
 643 #else /* HASFLOCK */
 644                         e->e_id = NULL;
 645                         for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 646                                 ee->e_id = NULL;
 647                         return;
 648 #endif /* HASFLOCK */
 649                 }
 650                 else if (pid > 0)
 651                 {
 652 #if HASFLOCK
 653                         /* be sure we leave the temp files to our child */
 654                         /* close any random open files in the envelope */
 655                         closexscript(e);
 656                         if (e->e_dfp != NULL)
 657                                 (void) sm_io_close(e->e_dfp, SM_TIME_DEFAULT);
 658                         e->e_dfp = NULL;
 659                         e->e_flags &= ~EF_HAS_DF;
 660
 661                         /* can't call unlockqueue to avoid unlink of xfp */
 662                         if (e->e_lockfp != NULL)
 663                                 (void) sm_io_close(e->e_lockfp, SM_TIME_DEFAULT);
 664                         else
 665                                 syserr("%s: sendall: null lockfp", e->e_id);
 666                         e->e_lockfp = NULL;
 667 #endif /* HASFLOCK */
 668
 669                         /* make sure the parent doesn't own the envelope */
 670                         e->e_id = NULL;
 671
 672 #if USE_DOUBLE_FORK
 673                         /* catch intermediate zombie */
 674                         (void) waitfor(pid);
 675 #endif /* USE_DOUBLE_FORK */
 676                         return;
 677                 }
 678
 679                 /* Reset global flags */
 680                 RestartRequest = NULL;
 681                 RestartWorkGroup = false;
 682                 ShutdownRequest = NULL;
 683                 PendingSignal = 0;
 684
 685                 /*
 686                 **  Initialize exception stack and default exception
 687                 **  handler for child process.
 688                 */
 689
 690                 sm_exc_newthread(fatal_error);
 691
 692                 /*
 693                 **  Since we have accepted responsbility for the message,
 694                 **  change the SIGTERM handler.  intsig() (the old handler)
 695                 **  would remove the envelope if this was a command line
 696                 **  message submission.
 697                 */
 698
 699                 (void) sm_signal(SIGTERM, SIG_DFL);
 700
 701 #if USE_DOUBLE_FORK
 702                 /* double fork to avoid zombies */
 703                 pid = fork();
 704                 if (pid > 0)
 705                         exit(EX_OK);
 706                 save_errno = errno;
 707 #endif /* USE_DOUBLE_FORK */
 708
 709                 CurrentPid = getpid();
 710
 711                 /* be sure we are immune from the terminal */
 712                 disconnect(2, e);
 713                 clearstats();
 714
 715                 /* prevent parent from waiting if there was an error */
 716                 if (pid < 0)
 717                 {
 718                         errno = save_errno;
 719                         syserr("deliver: fork 2");
 720 #if HASFLOCK
 721                         e->e_flags |= EF_INQUEUE;
 722 #else /* HASFLOCK */
 723                         e->e_id = NULL;
 724 #endif /* HASFLOCK */
 725                         finis(true, true, ExitStat);
 726                 }
 727
 728                 /* be sure to give error messages in child */
 729                 QuickAbort = false;
 730
 731                 /*
 732                 **  Close any cached connections.
 733                 **
 734                 **      We don't send the QUIT protocol because the parent
 735                 **      still knows about the connection.
 736                 **
 737                 **      This should only happen when delivering an error
 738                 **      message.
 739                 */
 740
 741                 mci_flush(false, NULL);
 742
 743 #if HASFLOCK
 744                 break;
 745 #else /* HASFLOCK */
 746
 747                 /*
 748                 **  Now reacquire and run the various queue files.
 749                 */
 750
 751                 for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 752                 {
 753                         ENVELOPE *sibling = ee->e_sibling;
 754
 755                         (void) dowork(ee->e_qgrp, ee->e_qdir, ee->e_id,
 756                                       false, false, ee);
 757                         ee->e_sibling = sibling;
 758                 }
 759                 (void) dowork(e->e_qgrp, e->e_qdir, e->e_id,
 760                               false, false, e);
 761                 finis(true, true, ExitStat);
 762 #endif /* HASFLOCK */
 763         }
 764
 765         sendenvelope(e, mode);
 766         (void) dropenvelope(e, true, true);
 767         for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 768         {
 769                 CurEnv = ee;
 770                 if (mode != SM_VERIFY)
 771                         openxscript(ee);
 772                 sendenvelope(ee, mode);
 773                 (void) dropenvelope(ee, true, true);
 774         }
 775         CurEnv = e;
 776
 777         Verbose = oldverbose;
 778         if (mode == SM_FORK)
 779                 finis(true, true, ExitStat);
 780 }
 781
 782 static void
 783 sendenvelope(e, mode)
 784         register ENVELOPE *e;
 785         int mode;
 786 {
 787         register ADDRESS *q;
 788         bool didany;
 789
 790         if (tTd(13, 10))
 791                 sm_dprintf("sendenvelope(%s) e_flags=0x%lx\n",
 792                            e->e_id == NULL ? "[NOQUEUE]" : e->e_id,
 793                            e->e_flags);
 794         if (LogLevel > 80)
 795                 sm_syslog(LOG_DEBUG, e->e_id,
 796                           "sendenvelope, flags=0x%lx",
 797                           e->e_flags);
 798
 799         /*
 800         **  If we have had global, fatal errors, don't bother sending
 801         **  the message at all if we are in SMTP mode.  Local errors
 802         **  (e.g., a single address failing) will still cause the other
 803         **  addresses to be sent.
 804         */
 805
 806         if (bitset(EF_FATALERRS, e->e_flags) &&
 807             (OpMode == MD_SMTP || OpMode == MD_DAEMON))
 808         {
 809                 e->e_flags |= EF_CLRQUEUE;
 810                 return;
 811         }
 812
 813         /*
 814         **  Don't attempt deliveries if we want to bounce now
 815         **  or if deliver-by time is exceeded.
 816         */
 817
 818         if (!bitset(EF_RESPONSE, e->e_flags) &&
 819             (TimeOuts.to_q_return[e->e_timeoutclass] == NOW ||
 820              (IS_DLVR_RETURN(e) && e->e_deliver_by > 0 &&
 821               curtime() > e->e_ctime + e->e_deliver_by)))
 822                 return;
 823
 824         /*
 825         **  Run through the list and send everything.
 826         **
 827         **      Set EF_GLOBALERRS so that error messages during delivery
 828         **      result in returned mail.
 829         */
 830
 831         e->e_nsent = 0;
 832         e->e_flags |= EF_GLOBALERRS;
 833
 834         macdefine(&e->e_macro, A_PERM, macid("{envid}"), e->e_envid);
 835         macdefine(&e->e_macro, A_PERM, macid("{bodytype}"), e->e_bodytype);
 836         didany = false;
 837
 838         if (!bitset(EF_SPLIT, e->e_flags))
 839         {
 840                 ENVELOPE *oldsib;
 841                 ENVELOPE *ee;
 842
 843                 /*
 844                 **  Save old sibling and set it to NULL to avoid
 845                 **  queueing up the same envelopes again.
 846                 **  This requires that envelopes in that list have
 847                 **  been take care of before (or at some other place).
 848                 */
 849
 850                 oldsib = e->e_sibling;
 851                 e->e_sibling = NULL;
 852                 if (!split_by_recipient(e) &&
 853                     bitset(EF_FATALERRS, e->e_flags))
 854                 {
 855                         if (OpMode == MD_SMTP || OpMode == MD_DAEMON)
 856                                 e->e_flags |= EF_CLRQUEUE;
 857                         return;
 858                 }
 859                 for (ee = e->e_sibling; ee != NULL; ee = ee->e_sibling)
 860                         queueup(ee, false, true);
 861
 862                 /* clean up */
 863                 for (ee = e->e_sibling; ee != NULL; ee = ee->e_sibling)
 864                 {
 865                         /* now unlock the job */
 866                         closexscript(ee);
 867                         unlockqueue(ee);
 868
 869                         /* this envelope is marked unused */
 870                         if (ee->e_dfp != NULL)
 871                         {
 872                                 (void) sm_io_close(ee->e_dfp, SM_TIME_DEFAULT);
 873                                 ee->e_dfp = NULL;
 874                         }
 875                         ee->e_id = NULL;
 876                         ee->e_flags &= ~EF_HAS_DF;
 877                 }
 878                 e->e_sibling = oldsib;
 879         }
 880
 881         /* now run through the queue */
 882         for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 883         {
 884 #if XDEBUG
 885                 char wbuf[MAXNAME + 20];
 886
 887                 (void) sm_snprintf(wbuf, sizeof(wbuf), "sendall(%.*s)",
 888                                    MAXNAME, q->q_paddr);
 889                 checkfd012(wbuf);
 890 #endif /* XDEBUG */
 891                 if (mode == SM_VERIFY)
 892                 {
 893                         e->e_to = q->q_paddr;
 894                         if (QS_IS_SENDABLE(q->q_state))
 895                         {
 896                                 if (q->q_host != NULL && q->q_host[0] != '\0')
 897                                         message("deliverable: mailer %s, host %s, user %s",
 898                                                 q->q_mailer->m_name,
 899                                                 q->q_host,
 900                                                 q->q_user);
 901                                 else
 902                                         message("deliverable: mailer %s, user %s",
 903                                                 q->q_mailer->m_name,
 904                                                 q->q_user);
 905                         }
 906                 }
 907                 else if (QS_IS_OK(q->q_state))
 908                 {
 909                         /*
 910                         **  Checkpoint the send list every few addresses
 911                         */
 912
 913                         if (CheckpointInterval > 0 &&
 914                             e->e_nsent >= CheckpointInterval)
 915                         {
 916                                 queueup(e, false, false);
 917                                 e->e_nsent = 0;
 918                         }
 919                         (void) deliver(e, q);
 920                         didany = true;
 921                 }
 922         }
 923         if (didany)
 924         {
 925                 e->e_dtime = curtime();
 926                 e->e_ntries++;
 927         }
 928
 929 #if XDEBUG
 930         checkfd012("end of sendenvelope");
 931 #endif /* XDEBUG */
 932 }
 933
 934 #if REQUIRES_DIR_FSYNC
 935 /*
 936 **  SYNC_DIR -- fsync a directory based on a filename
 937 **
 938 **      Parameters:
 939 **              filename -- path of file
 940 **              panic -- panic?
 941 **
 942 **      Returns:
 943 **              none
 944 */
 945
 946 void
 947 sync_dir(filename, panic)
 948         char *filename;
 949         bool panic;
 950 {
 951         int dirfd;
 952         char *dirp;
 953         char dir[MAXPATHLEN];
 954
 955         if (!RequiresDirfsync)
 956                 return;
 957
 958         /* filesystems which require the directory be synced */
 959         dirp = strrchr(filename, '/');
 960         if (dirp != NULL)
 961         {
 962                 if (sm_strlcpy(dir, filename, sizeof(dir)) >= sizeof(dir))
 963                         return;
 964                 dir[dirp - filename] = '\0';
 965                 dirp = dir;
 966         }
 967         else
 968                 dirp = ".";
 969         dirfd = open(dirp, O_RDONLY, 0700);
 970         if (tTd(40,32))
 971                 sm_syslog(LOG_INFO, NOQID, "sync_dir: %s: fsync(%d)",
 972                           dirp, dirfd);
 973         if (dirfd >= 0)
 974         {
 975                 if (fsync(dirfd) < 0)
 976                 {
 977                         if (panic)
 978                                 syserr("!sync_dir: cannot fsync directory %s",
 979                                        dirp);
 980                         else if (LogLevel > 1)
 981                                 sm_syslog(LOG_ERR, NOQID,
 982                                           "sync_dir: cannot fsync directory %s: %s",
 983                                           dirp, sm_errstring(errno));
 984                 }
 985                 (void) close(dirfd);
 986         }
 987 }
 988 #endif /* REQUIRES_DIR_FSYNC */
 989 /*
 990 **  DUP_QUEUE_FILE -- duplicate a queue file into a split queue
 991 **
 992 **      Parameters:
 993 **              e -- the existing envelope
 994 **              ee -- the new envelope
 995 **              type -- the queue file type (e.g., DATAFL_LETTER)
 996 **
 997 **      Returns:
 998 **              none
 999 */
1000
1001 static void
1002 dup_queue_file(e, ee, type)
1003         ENVELOPE *e, *ee;
1004         int type;
1005 {
1006         char f1buf[MAXPATHLEN], f2buf[MAXPATHLEN];
1007
1008         ee->e_dfp = NULL;
1009         ee->e_xfp = NULL;
1010
1011         /*
1012         **  Make sure both are in the same directory.
1013         */
1014
1015         (void) sm_strlcpy(f1buf, queuename(e, type), sizeof(f1buf));
1016         (void) sm_strlcpy(f2buf, queuename(ee, type), sizeof(f2buf));
1017
1018         /* Force the df to disk if it's not there yet */
1019         if (type == DATAFL_LETTER && e->e_dfp != NULL &&
1020             sm_io_setinfo(e->e_dfp, SM_BF_COMMIT, NULL) < 0 &&
1021             errno != EINVAL)
1022         {
1023                 syserr("!dup_queue_file: can't commit %s", f1buf);
1024                 /* NOTREACHED */
1025         }
1026
1027         if (link(f1buf, f2buf) < 0)
1028         {
1029                 int save_errno = errno;
1030
1031                 syserr("sendall: link(%s, %s)", f1buf, f2buf);
1032                 if (save_errno == EEXIST)
1033                 {
1034                         if (unlink(f2buf) < 0)
1035                         {
1036                                 syserr("!sendall: unlink(%s): permanent",
1037                                        f2buf);
1038                                 /* NOTREACHED */
1039                         }
1040                         if (link(f1buf, f2buf) < 0)
1041                         {
1042                                 syserr("!sendall: link(%s, %s): permanent",
1043                                        f1buf, f2buf);
1044                                 /* NOTREACHED */
1045                         }
1046                 }
1047         }
1048         SYNC_DIR(f2buf, true);
1049 }
1050 /*
1051 **  DOFORK -- do a fork, retrying a couple of times on failure.
1052 **
1053 **      This MUST be a macro, since after a vfork we are running
1054 **      two processes on the same stack!!!
1055 **
1056 **      Parameters:
1057 **              none.
1058 **
1059 **      Returns:
1060 **              From a macro???  You've got to be kidding!
1061 **
1062 **      Side Effects:
1063 **              Modifies the ==> LOCAL <== variable 'pid', leaving:
1064 **                      pid of child in parent, zero in child.
1065 **                      -1 on unrecoverable error.
1066 **
1067 **      Notes:
1068 **              I'm awfully sorry this looks so awful.  That's
1069 **              vfork for you.....
1070 */
1071
1072 #define NFORKTRIES      5
1073
1074 #ifndef FORK
1075 # define FORK   fork
1076 #endif /* ! FORK */
1077
1078 #define DOFORK(fORKfN) \
1079 {\
1080         register int i;\
1081 \
1082         for (i = NFORKTRIES; --i >= 0; )\
1083         {\
1084                 pid = fORKfN();\
1085                 if (pid >= 0)\
1086                         break;\
1087                 if (i > 0)\
1088                         (void) sleep((unsigned) NFORKTRIES - i);\
1089         }\
1090 }
1091 /*
1092 **  DOFORK -- simple fork interface to DOFORK.
1093 **
1094 **      Parameters:
1095 **              none.
1096 **
1097 **      Returns:
1098 **              pid of child in parent.
1099 **              zero in child.
1100 **              -1 on error.
1101 **
1102 **      Side Effects:
1103 **              returns twice, once in parent and once in child.
1104 */
1105
1106 pid_t
1107 dofork()
1108 {
1109         register pid_t pid = -1;
1110
1111         DOFORK(fork);
1112         return pid;
1113 }
1114
1115 /*
1116 **  COLONCMP -- compare host-signatures up to first ':' or EOS
1117 **
1118 **      This takes two strings which happen to be host-signatures and
1119 **      compares them. If the lowest preference portions of the MX-RR's
1120 **      match (up to ':' or EOS, whichever is first), then we have
1121 **      match. This is used for coattail-piggybacking messages during
1122 **      message delivery.
1123 **      If the signatures are the same up to the first ':' the remainder of
1124 **      the signatures are then compared with a normal strcmp(). This saves
1125 **      re-examining the first part of the signatures.
1126 **
1127 **      Parameters:
1128 **              a - first host-signature
1129 **              b - second host-signature
1130 **
1131 **      Returns:
1132 **              HS_MATCH_NO -- no "match".
1133 **              HS_MATCH_FIRST -- "match" for the first MX preference
1134 **                      (up to the first colon (':')).
1135 **              HS_MATCH_FULL -- match for the entire MX record.
1136 **
1137 **      Side Effects:
1138 **              none.
1139 */
1140
1141 #define HS_MATCH_NO     0
1142 #define HS_MATCH_FIRST  1
1143 #define HS_MATCH_FULL   2
1144
1145 static int
1146 coloncmp(a, b)
1147         register const char *a;
1148         register const char *b;
1149 {
1150         int ret = HS_MATCH_NO;
1151         int braclev = 0;
1152
1153         while (*a == *b++)
1154         {
1155                 /* Need to account for IPv6 bracketed addresses */
1156                 if (*a == '[')
1157                         braclev++;
1158                 else if (*a == ']' && braclev > 0)
1159                         braclev--;
1160                 else if (*a == ':' && braclev <= 0)
1161                 {
1162                         ret = HS_MATCH_FIRST;
1163                         a++;
1164                         break;
1165                 }
1166                 else if (*a == '\0')
1167                         return HS_MATCH_FULL; /* a full match */
1168                 a++;
1169         }
1170         if (ret == HS_MATCH_NO &&
1171             braclev <= 0 &&
1172             ((*a == '\0' && *(b - 1) == ':') ||
1173              (*a == ':' && *(b - 1) == '\0')))
1174                 return HS_MATCH_FIRST;
1175         if (ret == HS_MATCH_FIRST && strcmp(a, b) == 0)
1176                 return HS_MATCH_FULL;
1177
1178         return ret;
1179 }
1180
1181 /*
1182 **  SHOULD_TRY_FBSH -- Should try FallbackSmartHost?
1183 **
1184 **      Parameters:
1185 **              e -- envelope
1186 **              tried_fallbacksmarthost -- has been tried already? (in/out)
1187 **              hostbuf -- buffer for hostname (expand FallbackSmartHost) (out)
1188 **              hbsz -- size of hostbuf
1189 **              status -- current delivery status
1190 **
1191 **      Returns:
1192 **              true iff FallbackSmartHost should be tried.
1193 */
1194
1195 static bool should_try_fbsh __P((ENVELOPE *, bool *, char *, size_t, int));
1196
1197 static bool
1198 should_try_fbsh(e, tried_fallbacksmarthost, hostbuf, hbsz, status)
1199         ENVELOPE *e;
1200         bool *tried_fallbacksmarthost;
1201         char *hostbuf;
1202         size_t hbsz;
1203         int status;
1204 {
1205         /*
1206         **  If the host was not found or a temporary failure occurred
1207         **  and a FallbackSmartHost is defined (and we have not yet
1208         **  tried it), then make one last try with it as the host.
1209         */
1210
1211         if ((status == EX_NOHOST || status == EX_TEMPFAIL) &&
1212             FallbackSmartHost != NULL && !*tried_fallbacksmarthost)
1213         {
1214                 *tried_fallbacksmarthost = true;
1215                 expand(FallbackSmartHost, hostbuf, hbsz, e);
1216                 if (!wordinclass(hostbuf, 'w'))
1217                 {
1218                         if (tTd(11, 1))
1219                                 sm_dprintf("one last try with FallbackSmartHost %s\n",
1220                                            hostbuf);
1221                         return true;
1222                 }
1223         }
1224         return false;
1225 }
1226 /*
1227 **  DELIVER -- Deliver a message to a list of addresses.
1228 **
1229 **      This routine delivers to everyone on the same host as the
1230 **      user on the head of the list.  It is clever about mailers
1231 **      that don't handle multiple users.  It is NOT guaranteed
1232 **      that it will deliver to all these addresses however -- so
1233 **      deliver should be called once for each address on the
1234 **      list.
1235 **      Deliver tries to be as opportunistic as possible about piggybacking
1236 **      messages. Some definitions to make understanding easier follow below.
1237 **      Piggybacking occurs when an existing connection to a mail host can
1238 **      be used to send the same message to more than one recipient at the
1239 **      same time. So "no piggybacking" means one message for one recipient
1240 **      per connection. "Intentional piggybacking" happens when the
1241 **      recipients' host address (not the mail host address) is used to
1242 **      attempt piggybacking. Recipients with the same host address
1243 **      have the same mail host. "Coincidental piggybacking" relies on
1244 **      piggybacking based on all the mail host addresses in the MX-RR. This
1245 **      is "coincidental" in the fact it could not be predicted until the
1246 **      MX Resource Records for the hosts were obtained and examined. For
1247 **      example (preference order and equivalence is important, not values):
1248 **              domain1 IN MX 10 mxhost-A
1249 **                      IN MX 20 mxhost-B
1250 **              domain2 IN MX  4 mxhost-A
1251 **                      IN MX  8 mxhost-B
1252 **      Domain1 and domain2 can piggyback the same message to mxhost-A or
1253 **      mxhost-B (if mxhost-A cannot be reached).
1254 **      "Coattail piggybacking" relaxes the strictness of "coincidental
1255 **      piggybacking" in the hope that most significant (lowest value)
1256 **      MX preference host(s) can create more piggybacking. For example
1257 **      (again, preference order and equivalence is important, not values):
1258 **              domain3 IN MX 100 mxhost-C
1259 **                      IN MX 100 mxhost-D
1260 **                      IN MX 200 mxhost-E
1261 **              domain4 IN MX  50 mxhost-C
1262 **                      IN MX  50 mxhost-D
1263 **                      IN MX  80 mxhost-F
1264 **      A message for domain3 and domain4 can piggyback to mxhost-C if mxhost-C
1265 **      is available. Same with mxhost-D because in both RR's the preference
1266 **      value is the same as mxhost-C, respectively.
1267 **      So deliver attempts coattail piggybacking when possible. If the
1268 **      first MX preference level hosts cannot be used then the piggybacking
1269 **      reverts to coincidental piggybacking. Using the above example you
1270 **      cannot deliver to mxhost-F for domain3 regardless of preference value.
1271 **      ("Coattail" from "riding on the coattails of your predecessor" meaning
1272 **      gaining benefit from a predecessor effort with no or little addition
1273 **      effort. The predecessor here being the preceding MX RR).
1274 **
1275 **      Parameters:
1276 **              e -- the envelope to deliver.
1277 **              firstto -- head of the address list to deliver to.
1278 **
1279 **      Returns:
1280 **              zero -- successfully delivered.
1281 **              else -- some failure, see ExitStat for more info.
1282 **
1283 **      Side Effects:
1284 **              The standard input is passed off to someone.
1285 */
1286
1287 static int
1288 deliver(e, firstto)
1289         register ENVELOPE *e;
1290         ADDRESS *firstto;
1291 {
1292         char *host;                     /* host being sent to */
1293         char *user;                     /* user being sent to */
1294         char **pvp;
1295         register char **mvp;
1296         register char *p;
1297         register MAILER *m;             /* mailer for this recipient */
1298         ADDRESS *volatile ctladdr;
1299 #if HASSETUSERCONTEXT
1300         ADDRESS *volatile contextaddr = NULL;
1301 #endif /* HASSETUSERCONTEXT */
1302         register MCI *volatile mci;
1303         register ADDRESS *SM_NONVOLATILE to = firstto;
1304         volatile bool clever = false;   /* running user smtp to this mailer */
1305         ADDRESS *volatile tochain = NULL; /* users chain in this mailer call */
1306         int rcode;                      /* response code */
1307         SM_NONVOLATILE int lmtp_rcode = EX_OK;
1308         SM_NONVOLATILE int nummxhosts = 0; /* number of MX hosts available */
1309         SM_NONVOLATILE int hostnum = 0; /* current MX host index */
1310         char *firstsig;                 /* signature of firstto */
1311         volatile pid_t pid = -1;
1312         char *volatile curhost;
1313         SM_NONVOLATILE unsigned short port = 0;
1314         SM_NONVOLATILE time_t enough = 0;
1315 #if NETUNIX
1316         char *SM_NONVOLATILE mux_path = NULL;   /* path to UNIX domain socket */
1317 #endif /* NETUNIX */
1318         time_t xstart;
1319         bool suidwarn;
1320         bool anyok;                     /* at least one address was OK */
1321         SM_NONVOLATILE bool goodmxfound = false; /* at least one MX was OK */
1322         bool ovr;
1323         bool quarantine;
1324         int strsize;
1325         int rcptcount;
1326         int ret;
1327         static int tobufsize = 0;
1328         static char *tobuf = NULL;
1329         char *rpath;    /* translated return path */
1330         int mpvect[2];
1331         int rpvect[2];
1332         char *mxhosts[MAXMXHOSTS + 1];
1333         char *pv[MAXPV + 1];
1334         char buf[MAXNAME + 1];
1335         char cbuf[MAXPATHLEN];
1336
1337         errno = 0;
1338         SM_REQUIRE(firstto != NULL);    /* same as to */
1339         if (!QS_IS_OK(to->q_state))
1340                 return 0;
1341
1342         suidwarn = geteuid() == 0;
1343
1344         SM_REQUIRE(e != NULL);
1345         m = to->q_mailer;
1346         host = to->q_host;
1347         CurEnv = e;                     /* just in case */
1348         e->e_statmsg = NULL;
1349         SmtpError[0] = '\0';
1350         xstart = curtime();
1351
1352         if (tTd(10, 1))
1353                 sm_dprintf("\n--deliver, id=%s, mailer=%s, host=`%s', first user=`%s'\n",
1354                         e->e_id, m->m_name, host, to->q_user);
1355         if (tTd(10, 100))
1356                 printopenfds(false);
1357
1358         /*
1359         **  Clear {client_*} macros if this is a bounce message to
1360         **  prevent rejection by check_compat ruleset.
1361         */
1362
1363         if (bitset(EF_RESPONSE, e->e_flags))
1364         {
1365                 macdefine(&e->e_macro, A_PERM, macid("{client_name}"), "");
1366                 macdefine(&e->e_macro, A_PERM, macid("{client_ptr}"), "");
1367                 macdefine(&e->e_macro, A_PERM, macid("{client_addr}"), "");
1368                 macdefine(&e->e_macro, A_PERM, macid("{client_port}"), "");
1369                 macdefine(&e->e_macro, A_PERM, macid("{client_resolve}"), "");
1370         }
1371
1372         SM_TRY
1373         {
1374         ADDRESS *skip_back = NULL;
1375
1376         /*
1377         **  Do initial argv setup.
1378         **      Insert the mailer name.  Notice that $x expansion is
1379         **      NOT done on the mailer name.  Then, if the mailer has
1380         **      a picky -f flag, we insert it as appropriate.  This
1381         **      code does not check for 'pv' overflow; this places a
1382         **      manifest lower limit of 4 for MAXPV.
1383         **              The from address rewrite is expected to make
1384         **              the address relative to the other end.
1385         */
1386
1387         /* rewrite from address, using rewriting rules */
1388         rcode = EX_OK;
1389         SM_ASSERT(e->e_from.q_mailer != NULL);
1390         if (bitnset(M_UDBENVELOPE, e->e_from.q_mailer->m_flags))
1391                 p = e->e_sender;
1392         else
1393                 p = e->e_from.q_paddr;
1394         rpath = remotename(p, m, RF_SENDERADDR|RF_CANONICAL, &rcode, e);
1395         if (strlen(rpath) > MAXNAME)
1396         {
1397                 rpath = shortenstring(rpath, MAXSHORTSTR);
1398
1399                 /* avoid bogus errno */
1400                 errno = 0;
1401                 syserr("remotename: huge return path %s", rpath);
1402         }
1403         rpath = sm_rpool_strdup_x(e->e_rpool, rpath);
1404         macdefine(&e->e_macro, A_PERM, 'g', rpath);
1405         macdefine(&e->e_macro, A_PERM, 'h', host);
1406         Errors = 0;
1407         pvp = pv;
1408         *pvp++ = m->m_argv[0];
1409
1410         /* ignore long term host status information if mailer flag W is set */
1411         if (bitnset(M_NOHOSTSTAT, m->m_flags))
1412                 IgnoreHostStatus = true;
1413
1414         /* insert -f or -r flag as appropriate */
1415         if (FromFlag &&
1416             (bitnset(M_FOPT, m->m_flags) ||
1417              bitnset(M_ROPT, m->m_flags)))
1418         {
1419                 if (bitnset(M_FOPT, m->m_flags))
1420                         *pvp++ = "-f";
1421                 else
1422                         *pvp++ = "-r";
1423                 *pvp++ = rpath;
1424         }
1425
1426         /*
1427         **  Append the other fixed parts of the argv.  These run
1428         **  up to the first entry containing "$u".  There can only
1429         **  be one of these, and there are only a few more slots
1430         **  in the pv after it.
1431         */
1432
1433         for (mvp = m->m_argv; (p = *++mvp) != NULL; )
1434         {
1435                 /* can't use strchr here because of sign extension problems */
1436                 while (*p != '\0')
1437                 {
1438                         if ((*p++ & 0377) == MACROEXPAND)
1439                         {
1440                                 if (*p == 'u')
1441                                         break;
1442                         }
1443                 }
1444
1445                 if (*p != '\0')
1446                         break;
1447
1448                 /* this entry is safe -- go ahead and process it */
1449                 expand(*mvp, buf, sizeof(buf), e);
1450                 *pvp++ = sm_rpool_strdup_x(e->e_rpool, buf);
1451                 if (pvp >= &pv[MAXPV - 3])
1452                 {
1453                         syserr("554 5.3.5 Too many parameters to %s before $u",
1454                                pv[0]);
1455                         rcode = -1;
1456                         goto cleanup;
1457                 }
1458         }
1459
1460         /*
1461         **  If we have no substitution for the user name in the argument
1462         **  list, we know that we must supply the names otherwise -- and
1463         **  SMTP is the answer!!
1464         */
1465
1466         if (*mvp == NULL)
1467         {
1468                 /* running LMTP or SMTP */
1469                 clever = true;
1470                 *pvp = NULL;
1471         }
1472         else if (bitnset(M_LMTP, m->m_flags))
1473         {
1474                 /* not running LMTP */
1475                 sm_syslog(LOG_ERR, NULL,
1476                           "Warning: mailer %s: LMTP flag (F=z) turned off",
1477                           m->m_name);
1478                 clrbitn(M_LMTP, m->m_flags);
1479         }
1480
1481         /*
1482         **  At this point *mvp points to the argument with $u.  We
1483         **  run through our address list and append all the addresses
1484         **  we can.  If we run out of space, do not fret!  We can
1485         **  always send another copy later.
1486         */
1487
1488         e->e_to = NULL;
1489         strsize = 2;
1490         rcptcount = 0;
1491         ctladdr = NULL;
1492         if (firstto->q_signature == NULL)
1493                 firstto->q_signature = hostsignature(firstto->q_mailer,
1494                                                      firstto->q_host);
1495         firstsig = firstto->q_signature;
1496
1497         for (; to != NULL; to = to->q_next)
1498         {
1499                 /* avoid sending multiple recipients to dumb mailers */
1500                 if (tochain != NULL && !bitnset(M_MUSER, m->m_flags))
1501                         break;
1502
1503                 /* if already sent or not for this host, don't send */
1504                 if (!QS_IS_OK(to->q_state)) /* already sent; look at next */
1505                         continue;
1506
1507                 /*
1508                 **  Must be same mailer to keep grouping rcpts.
1509                 **  If mailers don't match: continue; sendqueue is not
1510                 **  sorted by mailers, so don't break;
1511                 */
1512
1513                 if (to->q_mailer != firstto->q_mailer)
1514                         continue;
1515
1516                 if (to->q_signature == NULL) /* for safety */
1517                         to->q_signature = hostsignature(to->q_mailer,
1518                                                         to->q_host);
1519
1520                 /*
1521                 **  This is for coincidental and tailcoat piggybacking messages
1522                 **  to the same mail host. While the signatures are identical
1523                 **  (that's the MX-RR's are identical) we can do coincidental
1524                 **  piggybacking. We try hard for coattail piggybacking
1525                 **  with the same mail host when the next recipient has the
1526                 **  same host at lowest preference. It may be that this
1527                 **  won't work out, so 'skip_back' is maintained if a backup
1528                 **  to coincidental piggybacking or full signature must happen.
1529                 */
1530
1531                 ret = firstto == to ? HS_MATCH_FULL :
1532                                       coloncmp(to->q_signature, firstsig);
1533                 if (ret == HS_MATCH_FULL)
1534                         skip_back = to;
1535                 else if (ret == HS_MATCH_NO)
1536                         break;
1537
1538                 if (!clever)
1539                 {
1540                         /* avoid overflowing tobuf */
1541                         strsize += strlen(to->q_paddr) + 1;
1542                         if (strsize > TOBUFSIZE)
1543                                 break;
1544                 }
1545
1546                 if (++rcptcount > to->q_mailer->m_maxrcpt)
1547                         break;
1548
1549                 if (tTd(10, 1))
1550                 {
1551                         sm_dprintf("\nsend to ");
1552                         printaddr(sm_debug_file(), to, false);
1553                 }
1554
1555                 /* compute effective uid/gid when sending */
1556                 if (bitnset(M_RUNASRCPT, to->q_mailer->m_flags))
1557 # if HASSETUSERCONTEXT
1558                         contextaddr = ctladdr = getctladdr(to);
1559 # else /* HASSETUSERCONTEXT */
1560                         ctladdr = getctladdr(to);
1561 # endif /* HASSETUSERCONTEXT */
1562
1563                 if (tTd(10, 2))
1564                 {
1565                         sm_dprintf("ctladdr=");
1566                         printaddr(sm_debug_file(), ctladdr, false);
1567                 }
1568
1569                 user = to->q_user;
1570                 e->e_to = to->q_paddr;
1571
1572                 /*
1573                 **  Check to see that these people are allowed to
1574                 **  talk to each other.
1575                 **  Check also for overflow of e_msgsize.
1576                 */
1577
1578                 if (m->m_maxsize != 0 &&
1579                     (e->e_msgsize > m->m_maxsize || e->e_msgsize < 0))
1580                 {
1581                         e->e_flags |= EF_NO_BODY_RETN;
1582                         if (bitnset(M_LOCALMAILER, to->q_mailer->m_flags))
1583                                 to->q_status = "5.2.3";
1584                         else
1585                                 to->q_status = "5.3.4";
1586
1587                         /* set to->q_rstatus = NULL; or to the following? */
1588                         usrerrenh(to->q_status,
1589                                   "552 Message is too large; %ld bytes max",
1590                                   m->m_maxsize);
1591                         markfailure(e, to, NULL, EX_UNAVAILABLE, false);
1592                         giveresponse(EX_UNAVAILABLE, to->q_status, m,
1593                                      NULL, ctladdr, xstart, e, to);
1594                         continue;
1595                 }
1596                 SM_SET_H_ERRNO(0);
1597                 ovr = true;
1598
1599                 /* do config file checking of compatibility */
1600                 quarantine = (e->e_quarmsg != NULL);
1601                 rcode = rscheck("check_compat", e->e_from.q_paddr, to->q_paddr,
1602                                 e, RSF_RMCOMM|RSF_COUNT, 3, NULL,
1603                                 e->e_id, NULL);
1604                 if (rcode == EX_OK)
1605                 {
1606                         /* do in-code checking if not discarding */
1607                         if (!bitset(EF_DISCARD, e->e_flags))
1608                         {
1609                                 rcode = checkcompat(to, e);
1610                                 ovr = false;
1611                         }
1612                 }
1613                 if (rcode != EX_OK)
1614                 {
1615                         markfailure(e, to, NULL, rcode, ovr);
1616                         giveresponse(rcode, to->q_status, m,
1617                                      NULL, ctladdr, xstart, e, to);
1618                         continue;
1619                 }
1620                 if (!quarantine && e->e_quarmsg != NULL)
1621                 {
1622                         /*
1623                         **  check_compat or checkcompat() has tried
1624                         **  to quarantine but that isn't supported.
1625                         **  Revert the attempt.
1626                         */
1627
1628                         e->e_quarmsg = NULL;
1629                         macdefine(&e->e_macro, A_PERM,
1630                                   macid("{quarantine}"), "");
1631                 }
1632                 if (bitset(EF_DISCARD, e->e_flags))
1633                 {
1634                         if (tTd(10, 5))
1635                         {
1636                                 sm_dprintf("deliver: discarding recipient ");
1637                                 printaddr(sm_debug_file(), to, false);
1638                         }
1639
1640                         /* pretend the message was sent */
1641                         /* XXX should we log something here? */
1642                         to->q_state = QS_DISCARDED;
1643
1644                         /*
1645                         **  Remove discard bit to prevent discard of
1646                         **  future recipients.  This is safe because the
1647                         **  true "global discard" has been handled before
1648                         **  we get here.
1649                         */
1650
1651                         e->e_flags &= ~EF_DISCARD;
1652                         continue;
1653                 }
1654
1655                 /*
1656                 **  Strip quote bits from names if the mailer is dumb
1657                 **      about them.
1658                 */
1659
1660                 if (bitnset(M_STRIPQ, m->m_flags))
1661                 {
1662                         stripquotes(user);
1663                         stripquotes(host);
1664                 }
1665
1666                 /*
1667                 **  Strip all leading backslashes if requested and the
1668                 **  next character is alphanumerical (the latter can
1669                 **  probably relaxed a bit, see RFC2821).
1670                 */
1671
1672                 if (bitnset(M_STRIPBACKSL, m->m_flags) && user[0] == '\\')
1673                         stripbackslash(user);
1674
1675                 /* hack attack -- delivermail compatibility */
1676                 if (m == ProgMailer && *user == '|')
1677                         user++;
1678
1679                 /*
1680                 **  If an error message has already been given, don't
1681                 **      bother to send to this address.
1682                 **
1683                 **      >>>>>>>>>> This clause assumes that the local mailer
1684                 **      >> NOTE >> cannot do any further aliasing; that
1685                 **      >>>>>>>>>> function is subsumed by sendmail.
1686                 */
1687
1688                 if (!QS_IS_OK(to->q_state))
1689                         continue;
1690
1691                 /*
1692                 **  See if this user name is "special".
1693                 **      If the user name has a slash in it, assume that this
1694                 **      is a file -- send it off without further ado.  Note
1695                 **      that this type of addresses is not processed along
1696                 **      with the others, so we fudge on the To person.
1697                 */
1698
1699                 if (strcmp(m->m_mailer, "[FILE]") == 0)
1700                 {
1701                         macdefine(&e->e_macro, A_PERM, 'u', user);
1702                         p = to->q_home;
1703                         if (p == NULL && ctladdr != NULL)
1704                                 p = ctladdr->q_home;
1705                         macdefine(&e->e_macro, A_PERM, 'z', p);
1706                         expand(m->m_argv[1], buf, sizeof(buf), e);
1707                         if (strlen(buf) > 0)
1708                                 rcode = mailfile(buf, m, ctladdr, SFF_CREAT, e);
1709                         else
1710                         {
1711                                 syserr("empty filename specification for mailer %s",
1712                                        m->m_name);
1713                                 rcode = EX_CONFIG;
1714                         }
1715                         giveresponse(rcode, to->q_status, m, NULL,
1716                                      ctladdr, xstart, e, to);
1717                         markfailure(e, to, NULL, rcode, true);
1718                         e->e_nsent++;
1719                         if (rcode == EX_OK)
1720                         {
1721                                 to->q_state = QS_SENT;
1722                                 if (bitnset(M_LOCALMAILER, m->m_flags) &&
1723                                     bitset(QPINGONSUCCESS, to->q_flags))
1724                                 {
1725                                         to->q_flags |= QDELIVERED;
1726                                         to->q_status = "2.1.5";
1727                                         (void) sm_io_fprintf(e->e_xfp,
1728                                                              SM_TIME_DEFAULT,
1729                                                              "%s... Successfully delivered\n",
1730                                                              to->q_paddr);
1731                                 }
1732                         }
1733                         to->q_statdate = curtime();
1734                         markstats(e, to, STATS_NORMAL);
1735                         continue;
1736                 }
1737
1738                 /*
1739                 **  Address is verified -- add this user to mailer
1740                 **  argv, and add it to the print list of recipients.
1741                 */
1742
1743                 /* link together the chain of recipients */
1744                 to->q_tchain = tochain;
1745                 tochain = to;
1746                 e->e_to = "[CHAIN]";
1747
1748                 macdefine(&e->e_macro, A_PERM, 'u', user);  /* to user */
1749                 p = to->q_home;
1750                 if (p == NULL && ctladdr != NULL)
1751                         p = ctladdr->q_home;
1752                 macdefine(&e->e_macro, A_PERM, 'z', p);  /* user's home */
1753
1754                 /* set the ${dsn_notify} macro if applicable */
1755                 if (bitset(QHASNOTIFY, to->q_flags))
1756                 {
1757                         char notify[MAXLINE];
1758
1759                         notify[0] = '\0';
1760                         if (bitset(QPINGONSUCCESS, to->q_flags))
1761                                 (void) sm_strlcat(notify, "SUCCESS,",
1762                                                   sizeof(notify));
1763                         if (bitset(QPINGONFAILURE, to->q_flags))
1764                                 (void) sm_strlcat(notify, "FAILURE,",
1765                                                   sizeof(notify));
1766                         if (bitset(QPINGONDELAY, to->q_flags))
1767                                 (void) sm_strlcat(notify, "DELAY,",
1768                                                   sizeof(notify));
1769
1770                         /* Set to NEVER or drop trailing comma */
1771                         if (notify[0] == '\0')
1772                                 (void) sm_strlcat(notify, "NEVER",
1773                                                   sizeof(notify));
1774                         else
1775                                 notify[strlen(notify) - 1] = '\0';
1776
1777                         macdefine(&e->e_macro, A_TEMP,
1778                                 macid("{dsn_notify}"), notify);
1779                 }
1780                 else
1781                         macdefine(&e->e_macro, A_PERM,
1782                                 macid("{dsn_notify}"), NULL);
1783
1784                 /*
1785                 **  Expand out this user into argument list.
1786                 */
1787
1788                 if (!clever)
1789                 {
1790                         expand(*mvp, buf, sizeof(buf), e);
1791                         *pvp++ = sm_rpool_strdup_x(e->e_rpool, buf);
1792                         if (pvp >= &pv[MAXPV - 2])
1793                         {
1794                                 /* allow some space for trailing parms */
1795                                 break;
1796                         }
1797                 }
1798         }
1799
1800         /* see if any addresses still exist */
1801         if (tochain == NULL)
1802         {
1803                 rcode = 0;
1804                 goto cleanup;
1805         }
1806
1807         /* print out messages as full list */
1808         strsize = 1;
1809         for (to = tochain; to != NULL; to = to->q_tchain)
1810                 strsize += strlen(to->q_paddr) + 1;
1811         if (strsize < TOBUFSIZE)
1812                 strsize = TOBUFSIZE;
1813         if (strsize > tobufsize)
1814         {
1815                 SM_FREE_CLR(tobuf);
1816                 tobuf = sm_pmalloc_x(strsize);
1817                 tobufsize = strsize;
1818         }
1819         p = tobuf;
1820         *p = '\0';
1821         for (to = tochain; to != NULL; to = to->q_tchain)
1822         {
1823                 (void) sm_strlcpyn(p, tobufsize - (p - tobuf), 2,
1824                                    ",", to->q_paddr);
1825                 p += strlen(p);
1826         }
1827         e->e_to = tobuf + 1;
1828
1829         /*
1830         **  Fill out any parameters after the $u parameter.
1831         */
1832
1833         if (!clever)
1834         {
1835                 while (*++mvp != NULL)
1836                 {
1837                         expand(*mvp, buf, sizeof(buf), e);
1838                         *pvp++ = sm_rpool_strdup_x(e->e_rpool, buf);
1839                         if (pvp >= &pv[MAXPV])
1840                                 syserr("554 5.3.0 deliver: pv overflow after $u for %s",
1841                                        pv[0]);
1842                 }
1843         }
1844         *pvp++ = NULL;
1845
1846         /*
1847         **  Call the mailer.
1848         **      The argument vector gets built, pipes
1849         **      are created as necessary, and we fork & exec as
1850         **      appropriate.
1851         **      If we are running SMTP, we just need to clean up.
1852         */
1853
1854         /* XXX this seems a bit weird */
1855         if (ctladdr == NULL && m != ProgMailer && m != FileMailer &&
1856             bitset(QGOODUID, e->e_from.q_flags))
1857                 ctladdr = &e->e_from;
1858
1859 #if NAMED_BIND
1860         if (ConfigLevel < 2)
1861                 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH);   /* XXX */
1862 #endif /* NAMED_BIND */
1863
1864         if (tTd(11, 1))
1865         {
1866                 sm_dprintf("openmailer:");
1867                 printav(sm_debug_file(), pv);
1868         }
1869         errno = 0;
1870         SM_SET_H_ERRNO(0);
1871         CurHostName = NULL;
1872
1873         /*
1874         **  Deal with the special case of mail handled through an IPC
1875         **  connection.
1876         **      In this case we don't actually fork.  We must be
1877         **      running SMTP for this to work.  We will return a
1878         **      zero pid to indicate that we are running IPC.
1879         **  We also handle a debug version that just talks to stdin/out.
1880         */
1881
1882         curhost = NULL;
1883         SmtpPhase = NULL;
1884         mci = NULL;
1885
1886 #if XDEBUG
1887         {
1888                 char wbuf[MAXLINE];
1889
1890                 /* make absolutely certain 0, 1, and 2 are in use */
1891                 (void) sm_snprintf(wbuf, sizeof(wbuf), "%s... openmailer(%s)",
1892                                    shortenstring(e->e_to, MAXSHORTSTR),
1893                                    m->m_name);
1894                 checkfd012(wbuf);
1895         }
1896 #endif /* XDEBUG */
1897
1898         /* check for 8-bit available */
1899         if (bitset(EF_HAS8BIT, e->e_flags) &&
1900             bitnset(M_7BITS, m->m_flags) &&
1901             (bitset(EF_DONT_MIME, e->e_flags) ||
1902              !(bitset(MM_MIME8BIT, MimeMode) ||
1903                (bitset(EF_IS_MIME, e->e_flags) &&
1904                 bitset(MM_CVTMIME, MimeMode)))))
1905         {
1906                 e->e_status = "5.6.3";
1907                 usrerrenh(e->e_status,
1908                           "554 Cannot send 8-bit data to 7-bit destination");
1909                 rcode = EX_DATAERR;
1910                 goto give_up;
1911         }
1912
1913         if (tTd(62, 8))
1914                 checkfds("before delivery");
1915
1916         /* check for Local Person Communication -- not for mortals!!! */
1917         if (strcmp(m->m_mailer, "[LPC]") == 0)
1918         {
1919                 if (clever)
1920                 {
1921                         /* flush any expired connections */
1922                         (void) mci_scan(NULL);
1923
1924                         /* try to get a cached connection or just a slot */
1925                         mci = mci_get(m->m_name, m);
1926                         if (mci->mci_host == NULL)
1927                                 mci->mci_host = m->m_name;
1928                         CurHostName = mci->mci_host;
1929                         if (mci->mci_state != MCIS_CLOSED)
1930                         {
1931                                 message("Using cached SMTP/LPC connection for %s...",
1932                                         m->m_name);
1933                                 mci->mci_deliveries++;
1934                                 goto do_transfer;
1935                         }
1936                 }
1937                 else
1938                 {
1939                         mci = mci_new(e->e_rpool);
1940                 }
1941                 mci->mci_in = smioin;
1942                 mci->mci_out = smioout;
1943                 mci->mci_mailer = m;
1944                 mci->mci_host = m->m_name;
1945                 if (clever)
1946                 {
1947                         mci->mci_state = MCIS_OPENING;
1948                         mci_cache(mci);
1949                 }
1950                 else
1951                         mci->mci_state = MCIS_OPEN;
1952         }
1953         else if (strcmp(m->m_mailer, "[IPC]") == 0)
1954         {
1955                 register int i;
1956
1957                 if (pv[0] == NULL || pv[1] == NULL || pv[1][0] == '\0')
1958                 {
1959                         syserr("null destination for %s mailer", m->m_mailer);
1960                         rcode = EX_CONFIG;
1961                         goto give_up;
1962                 }
1963
1964 # if NETUNIX
1965                 if (strcmp(pv[0], "FILE") == 0)
1966                 {
1967                         curhost = CurHostName = "localhost";
1968                         mux_path = pv[1];
1969                 }
1970                 else
1971 # endif /* NETUNIX */
1972                 {
1973                         CurHostName = pv[1];
1974                         curhost = hostsignature(m, pv[1]);
1975                 }
1976
1977                 if (curhost == NULL || curhost[0] == '\0')
1978                 {
1979                         syserr("null host signature for %s", pv[1]);
1980                         rcode = EX_CONFIG;
1981                         goto give_up;
1982                 }
1983
1984                 if (!clever)
1985                 {
1986                         syserr("554 5.3.5 non-clever IPC");
1987                         rcode = EX_CONFIG;
1988                         goto give_up;
1989                 }
1990                 if (pv[2] != NULL
1991 # if NETUNIX
1992                     && mux_path == NULL
1993 # endif /* NETUNIX */
1994                     )
1995                 {
1996                         port = htons((unsigned short) atoi(pv[2]));
1997                         if (port == 0)
1998                         {
1999 # ifdef NO_GETSERVBYNAME
2000                                 syserr("Invalid port number: %s", pv[2]);
2001 # else /* NO_GETSERVBYNAME */
2002                                 struct servent *sp = getservbyname(pv[2], "tcp");
2003
2004                                 if (sp == NULL)
2005                                         syserr("Service %s unknown", pv[2]);
2006                                 else
2007                                         port = sp->s_port;
2008 # endif /* NO_GETSERVBYNAME */
2009                         }
2010                 }
2011
2012                 nummxhosts = parse_hostsignature(curhost, mxhosts, m);
2013                 if (TimeOuts.to_aconnect > 0)
2014                         enough = curtime() + TimeOuts.to_aconnect;
2015 tryhost:
2016                 while (hostnum < nummxhosts)
2017                 {
2018                         char sep = ':';
2019                         char *endp;
2020                         static char hostbuf[MAXNAME + 1];
2021                         bool tried_fallbacksmarthost = false;
2022
2023 # if NETINET6
2024                         if (*mxhosts[hostnum] == '[')
2025                         {
2026                                 endp = strchr(mxhosts[hostnum] + 1, ']');
2027                                 if (endp != NULL)
2028                                         endp = strpbrk(endp + 1, ":,");
2029                         }
2030                         else
2031                                 endp = strpbrk(mxhosts[hostnum], ":,");
2032 # else /* NETINET6 */
2033                         endp = strpbrk(mxhosts[hostnum], ":,");
2034 # endif /* NETINET6 */
2035                         if (endp != NULL)
2036                         {
2037                                 sep = *endp;
2038                                 *endp = '\0';
2039                         }
2040
2041                         if (hostnum == 1 && skip_back != NULL)
2042                         {
2043                                 /*
2044                                 **  Coattail piggybacking is no longer an
2045                                 **  option with the mail host next to be tried
2046                                 **  no longer the lowest MX preference
2047                                 **  (hostnum == 1 meaning we're on the second
2048                                 **  preference). We do not try to coattail
2049                                 **  piggyback more than the first MX preference.
2050                                 **  Revert 'tochain' to last location for
2051                                 **  coincidental piggybacking. This works this
2052                                 **  easily because the q_tchain kept getting
2053                                 **  added to the top of the linked list.
2054                                 */
2055
2056                                 tochain = skip_back;
2057                         }
2058
2059                         if (*mxhosts[hostnum] == '\0')
2060                         {
2061                                 syserr("deliver: null host name in signature");
2062                                 hostnum++;
2063                                 if (endp != NULL)
2064                                         *endp = sep;
2065                                 continue;
2066                         }
2067                         (void) sm_strlcpy(hostbuf, mxhosts[hostnum],
2068                                           sizeof(hostbuf));
2069                         hostnum++;
2070                         if (endp != NULL)
2071                                 *endp = sep;
2072
2073   one_last_try:
2074                         /* see if we already know that this host is fried */
2075                         CurHostName = hostbuf;
2076                         mci = mci_get(hostbuf, m);
2077                         if (mci->mci_state != MCIS_CLOSED)
2078                         {
2079                                 char *type;
2080
2081                                 if (tTd(11, 1))
2082                                 {
2083                                         sm_dprintf("openmailer: ");
2084                                         mci_dump(sm_debug_file(), mci, false);
2085                                 }
2086                                 CurHostName = mci->mci_host;
2087                                 if (bitnset(M_LMTP, m->m_flags))
2088                                         type = "L";
2089                                 else if (bitset(MCIF_ESMTP, mci->mci_flags))
2090                                         type = "ES";
2091                                 else
2092                                         type = "S";
2093                                 message("Using cached %sMTP connection to %s via %s...",
2094                                         type, hostbuf, m->m_name);
2095                                 mci->mci_deliveries++;
2096                                 break;
2097                         }
2098                         mci->mci_mailer = m;
2099                         if (mci->mci_exitstat != EX_OK)
2100                         {
2101                                 if (mci->mci_exitstat == EX_TEMPFAIL)
2102                                         goodmxfound = true;
2103
2104                                 /* Try FallbackSmartHost? */
2105                                 if (should_try_fbsh(e, &tried_fallbacksmarthost,
2106                                                     hostbuf, sizeof(hostbuf),
2107                                                     mci->mci_exitstat))
2108                                         goto one_last_try;
2109
2110                                 continue;
2111                         }
2112
2113                         if (mci_lock_host(mci) != EX_OK)
2114                         {
2115                                 mci_setstat(mci, EX_TEMPFAIL, "4.4.5", NULL);
2116                                 goodmxfound = true;
2117                                 continue;
2118                         }
2119
2120                         /* try the connection */
2121                         sm_setproctitle(true, e, "%s %s: %s",
2122                                         qid_printname(e),
2123                                         hostbuf, "user open");
2124 # if NETUNIX
2125                         if (mux_path != NULL)
2126                         {
2127                                 message("Connecting to %s via %s...",
2128                                         mux_path, m->m_name);
2129                                 i = makeconnection_ds((char *) mux_path, mci);
2130                         }
2131                         else
2132 # endif /* NETUNIX */
2133                         {
2134                                 if (port == 0)
2135                                         message("Connecting to %s via %s...",
2136                                                 hostbuf, m->m_name);
2137                                 else
2138                                         message("Connecting to %s port %d via %s...",
2139                                                 hostbuf, ntohs(port),
2140                                                 m->m_name);
2141                                 i = makeconnection(hostbuf, port, mci, e,
2142                                                    enough);
2143                         }
2144                         mci->mci_errno = errno;
2145                         mci->mci_lastuse = curtime();
2146                         mci->mci_deliveries = 0;
2147                         mci->mci_exitstat = i;
2148                         mci_clr_extensions(mci);
2149 # if NAMED_BIND
2150                         mci->mci_herrno = h_errno;
2151 # endif /* NAMED_BIND */
2152
2153                         /*
2154                         **  Have we tried long enough to get a connection?
2155                         **      If yes, skip to the fallback MX hosts
2156                         **      (if existent).
2157                         */
2158
2159                         if (enough > 0 && mci->mci_lastuse >= enough)
2160                         {
2161                                 int h;
2162 # if NAMED_BIND
2163                                 extern int NumFallbackMXHosts;
2164 # else /* NAMED_BIND */
2165                                 const int NumFallbackMXHosts = 0;
2166 # endif /* NAMED_BIND */
2167
2168                                 if (hostnum < nummxhosts && LogLevel > 9)
2169                                         sm_syslog(LOG_INFO, e->e_id,
2170                                                   "Timeout.to_aconnect occurred before exhausting all addresses");
2171
2172                                 /* turn off timeout if fallback available */
2173                                 if (NumFallbackMXHosts > 0)
2174                                         enough = 0;
2175
2176                                 /* skip to a fallback MX host */
2177                                 h = nummxhosts - NumFallbackMXHosts;
2178                                 if (hostnum < h)
2179                                         hostnum = h;
2180                         }
2181                         if (i == EX_OK)
2182                         {
2183                                 goodmxfound = true;
2184                                 markstats(e, firstto, STATS_CONNECT);
2185                                 mci->mci_state = MCIS_OPENING;
2186                                 mci_cache(mci);
2187                                 if (TrafficLogFile != NULL)
2188                                         (void) sm_io_fprintf(TrafficLogFile,
2189                                                              SM_TIME_DEFAULT,
2190                                                              "%05d === CONNECT %s\n",
2191                                                              (int) CurrentPid,
2192                                                              hostbuf);
2193                                 break;
2194                         }
2195                         else
2196                         {
2197                                 /* Try FallbackSmartHost? */
2198                                 if (should_try_fbsh(e, &tried_fallbacksmarthost,
2199                                                     hostbuf, sizeof(hostbuf), i))
2200                                         goto one_last_try;
2201
2202                                 if (tTd(11, 1))
2203                                         sm_dprintf("openmailer: makeconnection => stat=%d, errno=%d\n",
2204                                                    i, errno);
2205                                 if (i == EX_TEMPFAIL)
2206                                         goodmxfound = true;
2207                                 mci_unlock_host(mci);
2208                         }
2209
2210                         /* enter status of this host */
2211                         setstat(i);
2212
2213                         /* should print some message here for -v mode */
2214                 }
2215                 if (mci == NULL)
2216                 {
2217                         syserr("deliver: no host name");
2218                         rcode = EX_SOFTWARE;
2219                         goto give_up;
2220                 }
2221                 mci->mci_pid = 0;
2222         }
2223         else
2224         {
2225                 /* flush any expired connections */
2226                 (void) mci_scan(NULL);
2227                 mci = NULL;
2228
2229                 if (bitnset(M_LMTP, m->m_flags))
2230                 {
2231                         /* try to get a cached connection */
2232                         mci = mci_get(m->m_name, m);
2233                         if (mci->mci_host == NULL)
2234                                 mci->mci_host = m->m_name;
2235                         CurHostName = mci->mci_host;
2236                         if (mci->mci_state != MCIS_CLOSED)
2237                         {
2238                                 message("Using cached LMTP connection for %s...",
2239                                         m->m_name);
2240                                 mci->mci_deliveries++;
2241                                 goto do_transfer;
2242                         }
2243                 }
2244
2245                 /* announce the connection to verbose listeners */
2246                 if (host == NULL || host[0] == '\0')
2247                         message("Connecting to %s...", m->m_name);
2248                 else
2249                         message("Connecting to %s via %s...", host, m->m_name);
2250                 if (TrafficLogFile != NULL)
2251                 {
2252                         char **av;
2253
2254                         (void) sm_io_fprintf(TrafficLogFile, SM_TIME_DEFAULT,
2255                                              "%05d === EXEC", (int) CurrentPid);
2256                         for (av = pv; *av != NULL; av++)
2257                                 (void) sm_io_fprintf(TrafficLogFile,
2258                                                      SM_TIME_DEFAULT, " %s",
2259                                                      *av);
2260                         (void) sm_io_fprintf(TrafficLogFile, SM_TIME_DEFAULT,
2261                                              "\n");
2262                 }
2263
2264 #if XDEBUG
2265                 checkfd012("before creating mail pipe");
2266 #endif /* XDEBUG */
2267
2268                 /* create a pipe to shove the mail through */
2269                 if (pipe(mpvect) < 0)
2270                 {
2271                         syserr("%s... openmailer(%s): pipe (to mailer)",
2272                                shortenstring(e->e_to, MAXSHORTSTR), m->m_name);
2273                         if (tTd(11, 1))
2274                                 sm_dprintf("openmailer: NULL\n");
2275                         rcode = EX_OSERR;
2276                         goto give_up;
2277                 }
2278
2279 #if XDEBUG
2280                 /* make sure we didn't get one of the standard I/O files */
2281                 if (mpvect[0] < 3 || mpvect[1] < 3)
2282                 {
2283                         syserr("%s... openmailer(%s): bogus mpvect %d %d",
2284                                shortenstring(e->e_to, MAXSHORTSTR), m->m_name,
2285                                mpvect[0], mpvect[1]);
2286                         printopenfds(true);
2287                         if (tTd(11, 1))
2288                                 sm_dprintf("openmailer: NULL\n");
2289                         rcode = EX_OSERR;
2290                         goto give_up;
2291                 }
2292
2293                 /* make sure system call isn't dead meat */
2294                 checkfdopen(mpvect[0], "mpvect[0]");
2295                 checkfdopen(mpvect[1], "mpvect[1]");
2296                 if (mpvect[0] == mpvect[1] ||
2297                     (e->e_lockfp != NULL &&
2298                      (mpvect[0] == sm_io_getinfo(e->e_lockfp, SM_IO_WHAT_FD,
2299                                                  NULL) ||
2300                       mpvect[1] == sm_io_getinfo(e->e_lockfp, SM_IO_WHAT_FD,
2301                                                  NULL))))
2302                 {
2303                         if (e->e_lockfp == NULL)
2304                                 syserr("%s... openmailer(%s): overlapping mpvect %d %d",
2305                                        shortenstring(e->e_to, MAXSHORTSTR),
2306                                        m->m_name, mpvect[0], mpvect[1]);
2307                         else
2308                                 syserr("%s... openmailer(%s): overlapping mpvect %d %d, lockfp = %d",
2309                                        shortenstring(e->e_to, MAXSHORTSTR),
2310                                        m->m_name, mpvect[0], mpvect[1],
2311                                        sm_io_getinfo(e->e_lockfp,
2312                                                      SM_IO_WHAT_FD, NULL));
2313                 }
2314 #endif /* XDEBUG */
2315
2316                 /* create a return pipe */
2317                 if (pipe(rpvect) < 0)
2318                 {
2319                         syserr("%s... openmailer(%s): pipe (from mailer)",
2320                                shortenstring(e->e_to, MAXSHORTSTR),
2321                                m->m_name);
2322                         (void) close(mpvect[0]);
2323                         (void) close(mpvect[1]);
2324                         if (tTd(11, 1))
2325                                 sm_dprintf("openmailer: NULL\n");
2326                         rcode = EX_OSERR;
2327                         goto give_up;
2328                 }
2329 #if XDEBUG
2330                 checkfdopen(rpvect[0], "rpvect[0]");
2331                 checkfdopen(rpvect[1], "rpvect[1]");
2332 #endif /* XDEBUG */
2333
2334                 /*
2335                 **  Actually fork the mailer process.
2336                 **      DOFORK is clever about retrying.
2337                 **
2338                 **      Dispose of SIGCHLD signal catchers that may be laying
2339                 **      around so that endmailer will get it.
2340                 */
2341
2342                 if (e->e_xfp != NULL)   /* for debugging */
2343                         (void) sm_io_flush(e->e_xfp, SM_TIME_DEFAULT);
2344                 (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
2345                 (void) sm_signal(SIGCHLD, SIG_DFL);
2346
2347
2348                 DOFORK(FORK);
2349                 /* pid is set by DOFORK */
2350
2351                 if (pid < 0)
2352                 {
2353                         /* failure */
2354                         syserr("%s... openmailer(%s): cannot fork",
2355                                shortenstring(e->e_to, MAXSHORTSTR), m->m_name);
2356                         (void) close(mpvect[0]);
2357                         (void) close(mpvect[1]);
2358                         (void) close(rpvect[0]);
2359                         (void) close(rpvect[1]);
2360                         if (tTd(11, 1))
2361                                 sm_dprintf("openmailer: NULL\n");
2362                         rcode = EX_OSERR;
2363                         goto give_up;
2364                 }
2365                 else if (pid == 0)
2366                 {
2367                         int save_errno;
2368                         int sff;
2369                         int new_euid = NO_UID;
2370                         int new_ruid = NO_UID;
2371                         int new_gid = NO_GID;
2372                         char *user = NULL;
2373                         struct stat stb;
2374                         extern int DtableSize;
2375
2376                         CurrentPid = getpid();
2377
2378                         /* clear the events to turn off SIGALRMs */
2379                         sm_clear_events();
2380
2381                         /* Reset global flags */
2382                         RestartRequest = NULL;
2383                         RestartWorkGroup = false;
2384                         ShutdownRequest = NULL;
2385                         PendingSignal = 0;
2386
2387                         if (e->e_lockfp != NULL)
2388                                 (void) close(sm_io_getinfo(e->e_lockfp,
2389                                                            SM_IO_WHAT_FD,
2390                                                            NULL));
2391
2392                         /* child -- set up input & exec mailer */
2393                         (void) sm_signal(SIGALRM, sm_signal_noop);
2394                         (void) sm_signal(SIGCHLD, SIG_DFL);
2395                         (void) sm_signal(SIGHUP, SIG_IGN);
2396                         (void) sm_signal(SIGINT, SIG_IGN);
2397                         (void) sm_signal(SIGTERM, SIG_DFL);
2398 # ifdef SIGUSR1
2399                         (void) sm_signal(SIGUSR1, sm_signal_noop);
2400 # endif /* SIGUSR1 */
2401
2402                         if (m != FileMailer || stat(tochain->q_user, &stb) < 0)
2403                                 stb.st_mode = 0;
2404
2405 # if HASSETUSERCONTEXT
2406                         /*
2407                         **  Set user resources.
2408                         */
2409
2410                         if (contextaddr != NULL)
2411                         {
2412                                 int sucflags;
2413                                 struct passwd *pwd;
2414
2415                                 if (contextaddr->q_ruser != NULL)
2416                                         pwd = sm_getpwnam(contextaddr->q_ruser);
2417                                 else
2418                                         pwd = sm_getpwnam(contextaddr->q_user);
2419                                 sucflags = LOGIN_SETRESOURCES|LOGIN_SETPRIORITY;
2420 #ifdef LOGIN_SETCPUMASK
2421                                 sucflags |= LOGIN_SETCPUMASK;
2422 #endif /* LOGIN_SETCPUMASK */
2423 #ifdef LOGIN_SETLOGINCLASS
2424                                 sucflags |= LOGIN_SETLOGINCLASS;
2425 #endif /* LOGIN_SETLOGINCLASS */
2426 #ifdef LOGIN_SETMAC
2427                                 sucflags |= LOGIN_SETMAC;
2428 #endif /* LOGIN_SETMAC */
2429                                 if (pwd != NULL &&
2430                                     setusercontext(NULL, pwd, pwd->pw_uid,
2431                                                    sucflags) == -1 &&
2432                                     suidwarn)
2433                                 {
2434                                         syserr("openmailer: setusercontext() failed");
2435                                         exit(EX_TEMPFAIL);
2436                                 }
2437                         }
2438 # endif /* HASSETUSERCONTEXT */
2439
2440 #if HASNICE
2441                         /* tweak niceness */
2442                         if (m->m_nice != 0)
2443                                 (void) nice(m->m_nice);
2444 #endif /* HASNICE */
2445
2446                         /* reset group id */
2447                         if (bitnset(M_SPECIFIC_UID, m->m_flags))
2448                         {
2449                                 if (m->m_gid == NO_GID)
2450                                         new_gid = RunAsGid;
2451                                 else
2452                                         new_gid = m->m_gid;
2453                         }
2454                         else if (bitset(S_ISGID, stb.st_mode))
2455                                 new_gid = stb.st_gid;
2456                         else if (ctladdr != NULL && ctladdr->q_gid != 0)
2457                         {
2458                                 if (!DontInitGroups)
2459                                 {
2460                                         user = ctladdr->q_ruser;
2461                                         if (user == NULL)
2462                                                 user = ctladdr->q_user;
2463
2464                                         if (initgroups(user,
2465                                                        ctladdr->q_gid) == -1
2466                                             && suidwarn)
2467                                         {
2468                                                 syserr("openmailer: initgroups(%s, %d) failed",
2469                                                         user, ctladdr->q_gid);
2470                                                 exit(EX_TEMPFAIL);
2471                                         }
2472                                 }
2473                                 else
2474                                 {
2475                                         GIDSET_T gidset[1];
2476
2477                                         gidset[0] = ctladdr->q_gid;
2478                                         if (setgroups(1, gidset) == -1
2479                                             && suidwarn)
2480                                         {
2481                                                 syserr("openmailer: setgroups() failed");
2482                                                 exit(EX_TEMPFAIL);
2483                                         }
2484                                 }
2485                                 new_gid = ctladdr->q_gid;
2486                         }
2487                         else
2488                         {
2489                                 if (!DontInitGroups)
2490                                 {
2491                                         user = DefUser;
2492                                         if (initgroups(DefUser, DefGid) == -1 &&
2493                                             suidwarn)
2494                                         {
2495                                                 syserr("openmailer: initgroups(%s, %d) failed",
2496                                                        DefUser, DefGid);
2497                                                 exit(EX_TEMPFAIL);
2498                                         }
2499                                 }
2500                                 else
2501                                 {
2502                                         GIDSET_T gidset[1];
2503
2504                                         gidset[0] = DefGid;
2505                                         if (setgroups(1, gidset) == -1
2506                                             && suidwarn)
2507                                         {
2508                                                 syserr("openmailer: setgroups() failed");
2509                                                 exit(EX_TEMPFAIL);
2510                                         }
2511                                 }
2512                                 if (m->m_gid == NO_GID)
2513                                         new_gid = DefGid;
2514                                 else
2515                                         new_gid = m->m_gid;
2516                         }
2517                         if (new_gid != NO_GID)
2518                         {
2519                                 if (RunAsUid != 0 &&
2520                                     bitnset(M_SPECIFIC_UID, m->m_flags) &&
2521                                     new_gid != getgid() &&
2522                                     new_gid != getegid())
2523                                 {
2524                                         /* Only root can change the gid */
2525                                         syserr("openmailer: insufficient privileges to change gid, RunAsUid=%d, new_gid=%d, gid=%d, egid=%d",
2526                                                (int) RunAsUid, (int) new_gid,
2527                                                (int) getgid(), (int) getegid());
2528                                         exit(EX_TEMPFAIL);
2529                                 }
2530
2531                                 if (setgid(new_gid) < 0 && suidwarn)
2532                                 {
2533                                         syserr("openmailer: setgid(%ld) failed",
2534                                                (long) new_gid);
2535                                         exit(EX_TEMPFAIL);
2536                                 }
2537                         }
2538
2539                         /* change root to some "safe" directory */
2540                         if (m->m_rootdir != NULL)
2541                         {
2542                                 expand(m->m_rootdir, cbuf, sizeof(cbuf), e);
2543                                 if (tTd(11, 20))
2544                                         sm_dprintf("openmailer: chroot %s\n",
2545                                                    cbuf);
2546                                 if (chroot(cbuf) < 0)
2547                                 {
2548                                         syserr("openmailer: Cannot chroot(%s)",
2549                                                cbuf);
2550                                         exit(EX_TEMPFAIL);
2551                                 }
2552                                 if (chdir("/") < 0)
2553                                 {
2554                                         syserr("openmailer: cannot chdir(/)");
2555                                         exit(EX_TEMPFAIL);
2556                                 }
2557                         }
2558
2559                         /* reset user id */
2560                         endpwent();
2561                         sm_mbdb_terminate();
2562                         if (bitnset(M_SPECIFIC_UID, m->m_flags))
2563                         {
2564                                 if (m->m_uid == NO_UID)
2565                                         new_euid = RunAsUid;
2566                                 else
2567                                         new_euid = m->m_uid;
2568
2569                                 /*
2570                                 **  Undo the effects of the uid change in main
2571                                 **  for signal handling.  The real uid may
2572                                 **  be used by mailer in adding a "From "
2573                                 **  line.
2574                                 */
2575
2576                                 if (RealUid != 0 && RealUid != getuid())
2577                                 {
2578 # if MAILER_SETUID_METHOD == USE_SETEUID
2579 #  if HASSETREUID
2580                                         if (setreuid(RealUid, geteuid()) < 0)
2581                                         {
2582                                                 syserr("openmailer: setreuid(%d, %d) failed",
2583                                                        (int) RealUid, (int) geteuid());
2584                                                 exit(EX_OSERR);
2585                                         }
2586 #  endif /* HASSETREUID */
2587 # endif /* MAILER_SETUID_METHOD == USE_SETEUID */
2588 # if MAILER_SETUID_METHOD == USE_SETREUID
2589                                         new_ruid = RealUid;
2590 # endif /* MAILER_SETUID_METHOD == USE_SETREUID */
2591                                 }
2592                         }
2593                         else if (bitset(S_ISUID, stb.st_mode))
2594                                 new_ruid = stb.st_uid;
2595                         else if (ctladdr != NULL && ctladdr->q_uid != 0)
2596                                 new_ruid = ctladdr->q_uid;
2597                         else if (m->m_uid != NO_UID)
2598                                 new_ruid = m->m_uid;
2599                         else
2600                                 new_ruid = DefUid;
2601
2602 # if _FFR_USE_SETLOGIN
2603                         /* run disconnected from terminal and set login name */
2604                         if (setsid() >= 0 &&
2605                             ctladdr != NULL && ctladdr->q_uid != 0 &&
2606                             new_euid == ctladdr->q_uid)
2607                         {
2608                                 struct passwd *pwd;
2609
2610                                 pwd = sm_getpwuid(ctladdr->q_uid);
2611                                 if (pwd != NULL && suidwarn)
2612                                         (void) setlogin(pwd->pw_name);
2613                                 endpwent();
2614                         }
2615 # endif /* _FFR_USE_SETLOGIN */
2616
2617                         if (new_euid != NO_UID)
2618                         {
2619                                 if (RunAsUid != 0 && new_euid != RunAsUid)
2620                                 {
2621                                         /* Only root can change the uid */
2622                                         syserr("openmailer: insufficient privileges to change uid, new_euid=%d, RunAsUid=%d",
2623                                                (int) new_euid, (int) RunAsUid);
2624                                         exit(EX_TEMPFAIL);
2625                                 }
2626
2627                                 vendor_set_uid(new_euid);
2628 # if MAILER_SETUID_METHOD == USE_SETEUID
2629                                 if (seteuid(new_euid) < 0 && suidwarn)
2630                                 {
2631                                         syserr("openmailer: seteuid(%ld) failed",
2632                                                (long) new_euid);
2633                                         exit(EX_TEMPFAIL);
2634                                 }
2635 # endif /* MAILER_SETUID_METHOD == USE_SETEUID */
2636 # if MAILER_SETUID_METHOD == USE_SETREUID
2637                                 if (setreuid(new_ruid, new_euid) < 0 && suidwarn)
2638                                 {
2639                                         syserr("openmailer: setreuid(%ld, %ld) failed",
2640                                                (long) new_ruid, (long) new_euid);
2641                                         exit(EX_TEMPFAIL);
2642                                 }
2643 # endif /* MAILER_SETUID_METHOD == USE_SETREUID */
2644 # if MAILER_SETUID_METHOD == USE_SETUID
2645                                 if (new_euid != geteuid() && setuid(new_euid) < 0 && suidwarn)
2646                                 {
2647                                         syserr("openmailer: setuid(%ld) failed",
2648                                                (long) new_euid);
2649                                         exit(EX_TEMPFAIL);
2650                                 }
2651 # endif /* MAILER_SETUID_METHOD == USE_SETUID */
2652                         }
2653                         else if (new_ruid != NO_UID)
2654                         {
2655                                 vendor_set_uid(new_ruid);
2656                                 if (setuid(new_ruid) < 0 && suidwarn)
2657                                 {
2658                                         syserr("openmailer: setuid(%ld) failed",
2659                                                (long) new_ruid);
2660                                         exit(EX_TEMPFAIL);
2661                                 }
2662                         }
2663
2664                         if (tTd(11, 2))
2665                                 sm_dprintf("openmailer: running as r/euid=%d/%d, r/egid=%d/%d\n",
2666                                            (int) getuid(), (int) geteuid(),
2667                                            (int) getgid(), (int) getegid());
2668
2669                         /* move into some "safe" directory */
2670                         if (m->m_execdir != NULL)
2671                         {
2672                                 char *q;
2673
2674                                 for (p = m->m_execdir; p != NULL; p = q)
2675                                 {
2676                                         q = strchr(p, ':');
2677                                         if (q != NULL)
2678                                                 *q = '\0';
2679                                         expand(p, cbuf, sizeof(cbuf), e);
2680                                         if (q != NULL)
2681                                                 *q++ = ':';
2682                                         if (tTd(11, 20))
2683                                                 sm_dprintf("openmailer: trydir %s\n",
2684                                                            cbuf);
2685                                         if (cbuf[0] != '\0' &&
2686                                             chdir(cbuf) >= 0)
2687                                                 break;
2688                                 }
2689                         }
2690
2691                         /* Check safety of program to be run */
2692                         sff = SFF_ROOTOK|SFF_EXECOK;
2693                         if (!bitnset(DBS_RUNWRITABLEPROGRAM,
2694                                      DontBlameSendmail))
2695                                 sff |= SFF_NOGWFILES|SFF_NOWWFILES;
2696                         if (bitnset(DBS_RUNPROGRAMINUNSAFEDIRPATH,
2697                                     DontBlameSendmail))
2698                                 sff |= SFF_NOPATHCHECK;
2699                         else
2700                                 sff |= SFF_SAFEDIRPATH;
2701                         ret = safefile(m->m_mailer, getuid(), getgid(),
2702                                        user, sff, 0, NULL);
2703                         if (ret != 0)
2704                                 sm_syslog(LOG_INFO, e->e_id,
2705                                           "Warning: program %s unsafe: %s",
2706                                           m->m_mailer, sm_errstring(ret));
2707
2708                         /* arrange to filter std & diag output of command */
2709                         (void) close(rpvect[0]);
2710                         if (dup2(rpvect[1], STDOUT_FILENO) < 0)
2711                         {
2712                                 syserr("%s... openmailer(%s): cannot dup pipe %d for stdout",
2713                                        shortenstring(e->e_to, MAXSHORTSTR),
2714                                        m->m_name, rpvect[1]);
2715                                 _exit(EX_OSERR);
2716                         }
2717                         (void) close(rpvect[1]);
2718
2719                         if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0)
2720                         {
2721                                 syserr("%s... openmailer(%s): cannot dup stdout for stderr",
2722                                        shortenstring(e->e_to, MAXSHORTSTR),
2723                                        m->m_name);
2724                                 _exit(EX_OSERR);
2725                         }
2726
2727                         /* arrange to get standard input */
2728                         (void) close(mpvect[1]);
2729                         if (dup2(mpvect[0], STDIN_FILENO) < 0)
2730                         {
2731                                 syserr("%s... openmailer(%s): cannot dup pipe %d for stdin",
2732                                        shortenstring(e->e_to, MAXSHORTSTR),
2733                                        m->m_name, mpvect[0]);
2734                                 _exit(EX_OSERR);
2735                         }
2736                         (void) close(mpvect[0]);
2737
2738                         /* arrange for all the files to be closed */
2739                         sm_close_on_exec(STDERR_FILENO + 1, DtableSize);
2740
2741 # if !_FFR_USE_SETLOGIN
2742                         /* run disconnected from terminal */
2743                         (void) setsid();
2744 # endif /* !_FFR_USE_SETLOGIN */
2745
2746                         /* try to execute the mailer */
2747                         (void) execve(m->m_mailer, (ARGV_T) pv,
2748                                       (ARGV_T) UserEnviron);
2749                         save_errno = errno;
2750                         syserr("Cannot exec %s", m->m_mailer);
2751                         if (bitnset(M_LOCALMAILER, m->m_flags) ||
2752                             transienterror(save_errno))
2753                                 _exit(EX_OSERR);
2754                         _exit(EX_UNAVAILABLE);
2755                 }
2756
2757                 /*
2758                 **  Set up return value.
2759                 */
2760
2761                 if (mci == NULL)
2762                 {
2763                         if (clever)
2764                         {
2765                                 /*
2766                                 **  Allocate from general heap, not
2767                                 **  envelope rpool, because this mci
2768                                 **  is going to be cached.
2769                                 */
2770
2771                                 mci = mci_new(NULL);
2772                         }
2773                         else
2774                         {
2775                                 /*
2776                                 **  Prevent a storage leak by allocating
2777                                 **  this from the envelope rpool.
2778                                 */
2779
2780                                 mci = mci_new(e->e_rpool);
2781                         }
2782                 }
2783                 mci->mci_mailer = m;
2784                 if (clever)
2785                 {
2786                         mci->mci_state = MCIS_OPENING;
2787                         mci_cache(mci);
2788                 }
2789                 else
2790                 {
2791                         mci->mci_state = MCIS_OPEN;
2792                 }
2793                 mci->mci_pid = pid;
2794                 (void) close(mpvect[0]);
2795                 mci->mci_out = sm_io_open(SmFtStdiofd, SM_TIME_DEFAULT,
2796                                           (void *) &(mpvect[1]), SM_IO_WRONLY_B,
2797                                           NULL);
2798                 if (mci->mci_out == NULL)
2799                 {
2800                         syserr("deliver: cannot create mailer output channel, fd=%d",
2801                                mpvect[1]);
2802                         (void) close(mpvect[1]);
2803                         (void) close(rpvect[0]);
2804                         (void) close(rpvect[1]);
2805                         rcode = EX_OSERR;
2806                         goto give_up;
2807                 }
2808
2809                 (void) close(rpvect[1]);
2810                 mci->mci_in = sm_io_open(SmFtStdiofd, SM_TIME_DEFAULT,
2811                                          (void *) &(rpvect[0]), SM_IO_RDONLY_B,
2812                                          NULL);
2813                 if (mci->mci_in == NULL)
2814                 {
2815                         syserr("deliver: cannot create mailer input channel, fd=%d",
2816                                mpvect[1]);
2817                         (void) close(rpvect[0]);
2818                         (void) sm_io_close(mci->mci_out, SM_TIME_DEFAULT);
2819                         mci->mci_out = NULL;
2820                         rcode = EX_OSERR;
2821                         goto give_up;
2822                 }
2823         }
2824
2825         /*
2826         **  If we are in SMTP opening state, send initial protocol.
2827         */
2828
2829         if (bitnset(M_7BITS, m->m_flags) &&
2830             (!clever || mci->mci_state == MCIS_OPENING))
2831                 mci->mci_flags |= MCIF_7BIT;
2832         if (clever && mci->mci_state != MCIS_CLOSED)
2833         {
2834 # if STARTTLS || SASL
2835                 int dotpos;
2836                 char *srvname;
2837                 extern SOCKADDR CurHostAddr;
2838 # endif /* STARTTLS || SASL */
2839
2840 # if SASL
2841 #  define DONE_AUTH(f)          bitset(MCIF_AUTHACT, f)
2842 # endif /* SASL */
2843 # if STARTTLS
2844 #  define DONE_STARTTLS(f)      bitset(MCIF_TLSACT, f)
2845 # endif /* STARTTLS */
2846 # define ONLY_HELO(f)           bitset(MCIF_ONLY_EHLO, f)
2847 # define SET_HELO(f)            f |= MCIF_ONLY_EHLO
2848 # define CLR_HELO(f)            f &= ~MCIF_ONLY_EHLO
2849
2850 # if STARTTLS || SASL
2851                 /* don't use CurHostName, it is changed in many places */
2852                 if (mci->mci_host != NULL)
2853                 {
2854                         srvname = mci->mci_host;
2855                         dotpos = strlen(srvname) - 1;
2856                         if (dotpos >= 0)
2857                         {
2858                                 if (srvname[dotpos] == '.')
2859                                         srvname[dotpos] = '\0';
2860                                 else
2861                                         dotpos = -1;
2862                         }
2863                 }
2864                 else if (mci->mci_mailer != NULL)
2865                 {
2866                         srvname = mci->mci_mailer->m_name;
2867                         dotpos = -1;
2868                 }
2869                 else
2870                 {
2871                         srvname = "local";
2872                         dotpos = -1;
2873                 }
2874
2875                 /* don't set {server_name} to NULL or "": see getauth() */
2876                 macdefine(&mci->mci_macro, A_TEMP, macid("{server_name}"),
2877                           srvname);
2878
2879                 /* CurHostAddr is set by makeconnection() and mci_get() */
2880                 if (CurHostAddr.sa.sa_family != 0)
2881                 {
2882                         macdefine(&mci->mci_macro, A_TEMP,
2883                                   macid("{server_addr}"),
2884                                   anynet_ntoa(&CurHostAddr));
2885                 }
2886                 else if (mci->mci_mailer != NULL)
2887                 {
2888                         /* mailer name is unique, use it as address */
2889                         macdefine(&mci->mci_macro, A_PERM,
2890                                   macid("{server_addr}"),
2891                                   mci->mci_mailer->m_name);
2892                 }
2893                 else
2894                 {
2895                         /* don't set it to NULL or "": see getauth() */
2896                         macdefine(&mci->mci_macro, A_PERM,
2897                                   macid("{server_addr}"), "0");
2898                 }
2899
2900                 /* undo change of srvname (mci->mci_host) */
2901                 if (dotpos >= 0)
2902                         srvname[dotpos] = '.';
2903
2904 reconnect:      /* after switching to an encrypted connection */
2905 # endif /* STARTTLS || SASL */
2906
2907                 /* set the current connection information */
2908                 e->e_mci = mci;
2909 # if SASL
2910                 mci->mci_saslcap = NULL;
2911 # endif /* SASL */
2912                 smtpinit(m, mci, e, ONLY_HELO(mci->mci_flags));
2913                 CLR_HELO(mci->mci_flags);
2914
2915                 if (IS_DLVR_RETURN(e))
2916                 {
2917                         /*
2918                         **  Check whether other side can deliver e-mail
2919                         **  fast enough
2920                         */
2921
2922                         if (!bitset(MCIF_DLVR_BY, mci->mci_flags))
2923                         {
2924                                 e->e_status = "5.4.7";
2925                                 usrerrenh(e->e_status,
2926                                           "554 Server does not support Deliver By");
2927                                 rcode = EX_UNAVAILABLE;
2928                                 goto give_up;
2929                         }
2930                         if (e->e_deliver_by > 0 &&
2931                             e->e_deliver_by - (curtime() - e->e_ctime) <
2932                             mci->mci_min_by)
2933                         {
2934                                 e->e_status = "5.4.7";
2935                                 usrerrenh(e->e_status,
2936                                           "554 Message can't be delivered in time; %ld < %ld",
2937                                           e->e_deliver_by - (curtime() - e->e_ctime),
2938                                           mci->mci_min_by);
2939                                 rcode = EX_UNAVAILABLE;
2940                                 goto give_up;
2941                         }
2942                 }
2943
2944 # if STARTTLS
2945                 /* first TLS then AUTH to provide a security layer */
2946                 if (mci->mci_state != MCIS_CLOSED &&
2947                     !DONE_STARTTLS(mci->mci_flags))
2948                 {
2949                         int olderrors;
2950                         bool usetls;
2951                         bool saveQuickAbort = QuickAbort;
2952                         bool saveSuprErrs = SuprErrs;
2953                         char *host = NULL;
2954
2955                         rcode = EX_OK;
2956                         usetls = bitset(MCIF_TLS, mci->mci_flags);
2957                         if (usetls)
2958                                 usetls = !iscltflgset(e, D_NOTLS);
2959
2960                         host = macvalue(macid("{server_name}"), e);
2961                         if (usetls)
2962                         {
2963                                 olderrors = Errors;
2964                                 QuickAbort = false;
2965                                 SuprErrs = true;
2966                                 if (rscheck("try_tls", host, NULL, e,
2967                                             RSF_RMCOMM, 7, host, NOQID, NULL)
2968                                                                 != EX_OK
2969                                     || Errors > olderrors)
2970                                 {
2971                                         usetls = false;
2972                                 }
2973                                 SuprErrs = saveSuprErrs;
2974                                 QuickAbort = saveQuickAbort;
2975                         }
2976
2977                         if (usetls)
2978                         {
2979                                 if ((rcode = starttls(m, mci, e)) == EX_OK)
2980                                 {
2981                                         /* start again without STARTTLS */
2982                                         mci->mci_flags |= MCIF_TLSACT;
2983                                 }
2984                                 else
2985                                 {
2986                                         char *s;
2987
2988                                         /*
2989                                         **  TLS negotiation failed, what to do?
2990                                         **  fall back to unencrypted connection
2991                                         **  or abort? How to decide?
2992                                         **  set a macro and call a ruleset.
2993                                         */
2994
2995                                         mci->mci_flags &= ~MCIF_TLS;
2996                                         switch (rcode)
2997                                         {
2998                                           case EX_TEMPFAIL:
2999                                                 s = "TEMP";
3000                                                 break;
3001                                           case EX_USAGE:
3002                                                 s = "USAGE";
3003                                                 break;
3004                                           case EX_PROTOCOL:
3005                                                 s = "PROTOCOL";
3006                                                 break;
3007                                           case EX_SOFTWARE:
3008                                                 s = "SOFTWARE";
3009                                                 break;
3010                                           case EX_UNAVAILABLE:
3011                                                 s = "NONE";
3012                                                 break;
3013
3014                                           /* everything else is a failure */
3015                                           default:
3016                                                 s = "FAILURE";
3017                                                 rcode = EX_TEMPFAIL;
3018                                         }
3019                                         macdefine(&e->e_macro, A_PERM,
3020                                                   macid("{verify}"), s);
3021                                 }
3022                         }
3023                         else
3024                                 macdefine(&e->e_macro, A_PERM,
3025                                           macid("{verify}"), "NONE");
3026                         olderrors = Errors;
3027                         QuickAbort = false;
3028                         SuprErrs = true;
3029
3030                         /*
3031                         **  rcode == EX_SOFTWARE is special:
3032                         **  the TLS negotiation failed
3033                         **  we have to drop the connection no matter what
3034                         **  However, we call tls_server to give it the chance
3035                         **  to log the problem and return an appropriate
3036                         **  error code.
3037                         */
3038
3039                         if (rscheck("tls_server",
3040                                     macvalue(macid("{verify}"), e),
3041                                     NULL, e, RSF_RMCOMM|RSF_COUNT, 5,
3042                                     host, NOQID, NULL) != EX_OK ||
3043                             Errors > olderrors ||
3044                             rcode == EX_SOFTWARE)
3045                         {
3046                                 char enhsc[ENHSCLEN];
3047                                 extern char MsgBuf[];
3048
3049                                 if (ISSMTPCODE(MsgBuf) &&
3050                                     extenhsc(MsgBuf + 4, ' ', enhsc) > 0)
3051                                 {
3052                                         p = sm_rpool_strdup_x(e->e_rpool,
3053                                                               MsgBuf);
3054                                 }
3055                                 else
3056                                 {
3057                                         p = "403 4.7.0 server not authenticated.";
3058                                         (void) sm_strlcpy(enhsc, "4.7.0",
3059                                                           sizeof(enhsc));
3060                                 }
3061                                 SuprErrs = saveSuprErrs;
3062                                 QuickAbort = saveQuickAbort;
3063
3064                                 if (rcode == EX_SOFTWARE)
3065                                 {
3066                                         /* drop the connection */
3067                                         mci->mci_state = MCIS_QUITING;
3068                                         if (mci->mci_in != NULL)
3069                                         {
3070                                                 (void) sm_io_close(mci->mci_in,
3071                                                                    SM_TIME_DEFAULT);
3072                                                 mci->mci_in = NULL;
3073                                         }
3074                                         mci->mci_flags &= ~MCIF_TLSACT;
3075                                         (void) endmailer(mci, e, pv);
3076                                 }
3077                                 else
3078                                 {
3079                                         /* abort transfer */
3080                                         smtpquit(m, mci, e);
3081                                 }
3082
3083                                 /* avoid bogus error msg */
3084                                 mci->mci_errno = 0;
3085
3086                                 /* temp or permanent failure? */
3087                                 rcode = (*p == '4') ? EX_TEMPFAIL
3088                                                     : EX_UNAVAILABLE;
3089                                 mci_setstat(mci, rcode, enhsc, p);
3090
3091                                 /*
3092                                 **  hack to get the error message into
3093                                 **  the envelope (done in giveresponse())
3094                                 */
3095
3096                                 (void) sm_strlcpy(SmtpError, p,
3097                                                   sizeof(SmtpError));
3098                         }
3099                         else if (mci->mci_state == MCIS_CLOSED)
3100                         {
3101                                 /* connection close caused by 421 */
3102                                 mci->mci_errno = 0;
3103                                 rcode = EX_TEMPFAIL;
3104                                 mci_setstat(mci, rcode, NULL, "421");
3105                         }
3106                         else
3107                                 rcode = 0;
3108
3109                         QuickAbort = saveQuickAbort;
3110                         SuprErrs = saveSuprErrs;
3111                         if (DONE_STARTTLS(mci->mci_flags) &&
3112                             mci->mci_state != MCIS_CLOSED)
3113                         {
3114                                 SET_HELO(mci->mci_flags);
3115                                 mci_clr_extensions(mci);
3116                                 goto reconnect;
3117                         }
3118                 }
3119 # endif /* STARTTLS */
3120 # if SASL
3121                 /* if other server supports authentication let's authenticate */
3122                 if (mci->mci_state != MCIS_CLOSED &&
3123                     mci->mci_saslcap != NULL &&
3124                     !DONE_AUTH(mci->mci_flags) && !iscltflgset(e, D_NOAUTH))
3125                 {
3126                         /* Should we require some minimum authentication? */
3127                         if ((ret = smtpauth(m, mci, e)) == EX_OK)
3128                         {
3129                                 int result;
3130                                 sasl_ssf_t *ssf = NULL;
3131
3132                                 /* Get security strength (features) */
3133                                 result = sasl_getprop(mci->mci_conn, SASL_SSF,
3134 # if SASL >= 20000
3135                                                       (const void **) &ssf);
3136 # else /* SASL >= 20000 */
3137                                                       (void **) &ssf);
3138 # endif /* SASL >= 20000 */
3139
3140                                 /* XXX authid? */
3141                                 if (LogLevel > 9)
3142                                         sm_syslog(LOG_INFO, NOQID,
3143                                                   "AUTH=client, relay=%.100s, mech=%.16s, bits=%d",
3144                                                   mci->mci_host,
3145                                                   macvalue(macid("{auth_type}"), e),
3146                                                   result == SASL_OK ? *ssf : 0);
3147
3148                                 /*
3149                                 **  Only switch to encrypted connection
3150                                 **  if a security layer has been negotiated
3151                                 */
3152
3153                                 if (result == SASL_OK && *ssf > 0)
3154                                 {
3155                                         int tmo;
3156
3157                                         /*
3158                                         **  Convert I/O layer to use SASL.
3159                                         **  If the call fails, the connection
3160                                         **  is aborted.
3161                                         */
3162
3163                                         tmo = DATA_PROGRESS_TIMEOUT * 1000;
3164                                         if (sfdcsasl(&mci->mci_in,
3165                                                      &mci->mci_out,
3166                                                      mci->mci_conn, tmo) == 0)
3167                                         {
3168                                                 mci_clr_extensions(mci);
3169                                                 mci->mci_flags |= MCIF_AUTHACT|
3170                                                                   MCIF_ONLY_EHLO;
3171                                                 goto reconnect;
3172                                         }
3173                                         syserr("AUTH TLS switch failed in client");
3174                                 }
3175                                 /* else? XXX */
3176                                 mci->mci_flags |= MCIF_AUTHACT;
3177
3178                         }
3179                         else if (ret == EX_TEMPFAIL)
3180                         {
3181                                 if (LogLevel > 8)
3182                                         sm_syslog(LOG_ERR, NOQID,
3183                                                   "AUTH=client, relay=%.100s, temporary failure, connection abort",
3184                                                   mci->mci_host);
3185                                 smtpquit(m, mci, e);
3186
3187                                 /* avoid bogus error msg */
3188                                 mci->mci_errno = 0;
3189                                 rcode = EX_TEMPFAIL;
3190                                 mci_setstat(mci, rcode, "4.3.0", p);
3191
3192                                 /*
3193                                 **  hack to get the error message into
3194                                 **  the envelope (done in giveresponse())
3195                                 */
3196
3197                                 (void) sm_strlcpy(SmtpError,
3198                                                   "Temporary AUTH failure",
3199                                                   sizeof(SmtpError));
3200                         }
3201                 }
3202 # endif /* SASL */
3203         }
3204
3205
3206 do_transfer:
3207         /* clear out per-message flags from connection structure */
3208         mci->mci_flags &= ~(MCIF_CVT7TO8|MCIF_CVT8TO7);
3209
3210         if (bitset(EF_HAS8BIT, e->e_flags) &&
3211             !bitset(EF_DONT_MIME, e->e_flags) &&
3212             bitnset(M_7BITS, m->m_flags))
3213                 mci->mci_flags |= MCIF_CVT8TO7;
3214
3215 #if MIME7TO8
3216         if (bitnset(M_MAKE8BIT, m->m_flags) &&
3217             !bitset(MCIF_7BIT, mci->mci_flags) &&
3218             (p = hvalue("Content-Transfer-Encoding", e->e_header)) != NULL &&
3219              (sm_strcasecmp(p, "quoted-printable") == 0 ||
3220               sm_strcasecmp(p, "base64") == 0) &&
3221             (p = hvalue("Content-Type", e->e_header)) != NULL)
3222         {
3223                 /* may want to convert 7 -> 8 */
3224                 /* XXX should really parse it here -- and use a class XXX */
3225                 if (sm_strncasecmp(p, "text/plain", 10) == 0 &&
3226                     (p[10] == '\0' || p[10] == ' ' || p[10] == ';'))
3227                         mci->mci_flags |= MCIF_CVT7TO8;
3228         }
3229 #endif /* MIME7TO8 */
3230
3231         if (tTd(11, 1))
3232         {
3233                 sm_dprintf("openmailer: ");
3234                 mci_dump(sm_debug_file(), mci, false);
3235         }
3236
3237 #if _FFR_CLIENT_SIZE
3238         /*
3239         **  See if we know the maximum size and
3240         **  abort if the message is too big.
3241         **
3242         **  NOTE: _FFR_CLIENT_SIZE is untested.
3243         */
3244
3245         if (bitset(MCIF_SIZE, mci->mci_flags) &&
3246             mci->mci_maxsize > 0 &&
3247             e->e_msgsize > mci->mci_maxsize)
3248         {
3249                 e->e_flags |= EF_NO_BODY_RETN;
3250                 if (bitnset(M_LOCALMAILER, m->m_flags))
3251                         e->e_status = "5.2.3";
3252                 else
3253                         e->e_status = "5.3.4";
3254
3255                 usrerrenh(e->e_status,
3256                           "552 Message is too large; %ld bytes max",
3257                           mci->mci_maxsize);
3258                 rcode = EX_DATAERR;
3259
3260                 /* Need an e_message for error */
3261                 (void) sm_snprintf(SmtpError, sizeof(SmtpError),
3262                                    "Message is too large; %ld bytes max",
3263                                    mci->mci_maxsize);
3264                 goto give_up;
3265         }
3266 #endif /* _FFR_CLIENT_SIZE */
3267
3268         if (mci->mci_state != MCIS_OPEN)
3269         {
3270                 /* couldn't open the mailer */
3271                 rcode = mci->mci_exitstat;
3272                 errno = mci->mci_errno;
3273                 SM_SET_H_ERRNO(mci->mci_herrno);
3274                 if (rcode == EX_OK)
3275                 {
3276                         /* shouldn't happen */
3277                         syserr("554 5.3.5 deliver: mci=%lx rcode=%d errno=%d state=%d sig=%s",
3278                                (unsigned long) mci, rcode, errno,
3279                                mci->mci_state, firstsig);
3280                         mci_dump_all(smioout, true);
3281                         rcode = EX_SOFTWARE;
3282                 }
3283                 else if (nummxhosts > hostnum)
3284                 {
3285                         /* try next MX site */
3286                         goto tryhost;
3287                 }
3288         }
3289         else if (!clever)
3290         {
3291                 bool ok;
3292
3293                 /*
3294                 **  Format and send message.
3295                 */
3296
3297                 rcode = EX_OK;
3298                 errno = 0;
3299                 ok = putfromline(mci, e);
3300                 if (ok)
3301                         ok = (*e->e_puthdr)(mci, e->e_header, e, M87F_OUTER);
3302                 if (ok)
3303                         ok = (*e->e_putbody)(mci, e, NULL);
3304                 if (ok && bitset(MCIF_INLONGLINE, mci->mci_flags))
3305                         ok = putline("", mci);
3306
3307                 /*
3308                 **  Ignore an I/O error that was caused by EPIPE.
3309                 **  Some broken mailers don't read the entire body
3310                 **  but just exit() thus causing an I/O error.
3311                 */
3312
3313                 if (!ok && (sm_io_error(mci->mci_out) && errno == EPIPE))
3314                         ok = true;
3315
3316                 /* (always) get the exit status */
3317                 rcode = endmailer(mci, e, pv);
3318                 if (!ok)
3319                         rcode = EX_TEMPFAIL;
3320                 if (rcode == EX_TEMPFAIL && SmtpError[0] == '\0')
3321                 {
3322                         /*
3323                         **  Need an e_message for mailq display.
3324                         **  We set SmtpError as
3325                         */
3326
3327                         (void) sm_snprintf(SmtpError, sizeof(SmtpError),
3328                                            "%s mailer (%s) exited with EX_TEMPFAIL",
3329                                            m->m_name, m->m_mailer);
3330                 }
3331         }
3332         else
3333         {
3334                 /*
3335                 **  Send the MAIL FROM: protocol
3336                 */
3337
3338                 /* XXX this isn't pipelined... */
3339                 rcode = smtpmailfrom(m, mci, e);
3340                 if (rcode == EX_OK)
3341                 {
3342                         register int i;
3343 # if PIPELINING
3344                         ADDRESS *volatile pchain;
3345 # endif /* PIPELINING */
3346
3347                         /* send the recipient list */
3348                         tobuf[0] = '\0';
3349                         mci->mci_retryrcpt = false;
3350                         mci->mci_tolist = tobuf;
3351 # if PIPELINING
3352                         pchain = NULL;
3353                         mci->mci_nextaddr = NULL;
3354 # endif /* PIPELINING */
3355
3356                         for (to = tochain; to != NULL; to = to->q_tchain)
3357                         {
3358                                 if (!QS_IS_UNMARKED(to->q_state))
3359                                         continue;
3360
3361                                 /* mark recipient state as "ok so far" */
3362                                 to->q_state = QS_OK;
3363                                 e->e_to = to->q_paddr;
3364 # if STARTTLS
3365                                 i = rscheck("tls_rcpt", to->q_user, NULL, e,
3366                                             RSF_RMCOMM|RSF_COUNT, 3,
3367                                             mci->mci_host, e->e_id, NULL);
3368                                 if (i != EX_OK)
3369                                 {
3370                                         markfailure(e, to, mci, i, false);
3371                                         giveresponse(i, to->q_status,  m, mci,
3372                                                      ctladdr, xstart, e, to);
3373                                         if (i == EX_TEMPFAIL)
3374                                         {
3375                                                 mci->mci_retryrcpt = true;
3376                                                 to->q_state = QS_RETRY;
3377                                         }
3378                                         continue;
3379                                 }
3380 # endif /* STARTTLS */
3381
3382                                 i = smtprcpt(to, m, mci, e, ctladdr, xstart);
3383 # if PIPELINING
3384                                 if (i == EX_OK &&
3385                                     bitset(MCIF_PIPELINED, mci->mci_flags))
3386                                 {
3387                                         /*
3388                                         **  Add new element to list of
3389                                         **  recipients for pipelining.
3390                                         */
3391
3392                                         to->q_pchain = NULL;
3393                                         if (mci->mci_nextaddr == NULL)
3394                                                 mci->mci_nextaddr = to;
3395                                         if (pchain == NULL)
3396                                                 pchain = to;
3397                                         else
3398                                         {
3399                                                 pchain->q_pchain = to;
3400                                                 pchain = pchain->q_pchain;
3401                                         }
3402                                 }
3403 # endif /* PIPELINING */
3404                                 if (i != EX_OK)
3405                                 {
3406                                         markfailure(e, to, mci, i, false);
3407                                         giveresponse(i, to->q_status, m, mci,
3408                                                      ctladdr, xstart, e, to);
3409                                         if (i == EX_TEMPFAIL)
3410                                                 to->q_state = QS_RETRY;
3411                                 }
3412                         }
3413
3414                         /* No recipients in list and no missing responses? */
3415                         if (tobuf[0] == '\0'
3416 # if PIPELINING
3417                             && bitset(MCIF_PIPELINED, mci->mci_flags)
3418                             && mci->mci_nextaddr == NULL
3419 # endif /* PIPELINING */
3420                            )
3421                         {
3422                                 rcode = EX_OK;
3423                                 e->e_to = NULL;
3424                                 if (bitset(MCIF_CACHED, mci->mci_flags))
3425                                         smtprset(m, mci, e);
3426                         }
3427                         else
3428                         {
3429                                 e->e_to = tobuf + 1;
3430                                 rcode = smtpdata(m, mci, e, ctladdr, xstart);
3431                         }
3432                 }
3433                 if (rcode == EX_TEMPFAIL && nummxhosts > hostnum)
3434                 {
3435                         /* try next MX site */
3436                         goto tryhost;
3437                 }
3438         }
3439 #if NAMED_BIND
3440         if (ConfigLevel < 2)
3441                 _res.options |= RES_DEFNAMES | RES_DNSRCH;      /* XXX */
3442 #endif /* NAMED_BIND */
3443
3444         if (tTd(62, 1))
3445                 checkfds("after delivery");
3446
3447         /*
3448         **  Do final status disposal.
3449         **      We check for something in tobuf for the SMTP case.
3450         **      If we got a temporary failure, arrange to queue the
3451         **              addressees.
3452         */
3453
3454   give_up:
3455         if (bitnset(M_LMTP, m->m_flags))
3456         {
3457                 lmtp_rcode = rcode;
3458                 tobuf[0] = '\0';
3459                 anyok = false;
3460                 strsize = 0;
3461         }
3462         else
3463                 anyok = rcode == EX_OK;
3464
3465         for (to = tochain; to != NULL; to = to->q_tchain)
3466         {
3467                 /* see if address already marked */
3468                 if (!QS_IS_OK(to->q_state))
3469                         continue;
3470
3471                 /* if running LMTP, get the status for each address */
3472                 if (bitnset(M_LMTP, m->m_flags))
3473                 {
3474                         if (lmtp_rcode == EX_OK)
3475                                 rcode = smtpgetstat(m, mci, e);
3476                         if (rcode == EX_OK)
3477                         {
3478                                 strsize += sm_strlcat2(tobuf + strsize, ",",
3479                                                 to->q_paddr,
3480                                                 tobufsize - strsize);
3481                                 SM_ASSERT(strsize < tobufsize);
3482                                 anyok = true;
3483                         }
3484                         else
3485                         {
3486                                 e->e_to = to->q_paddr;
3487                                 markfailure(e, to, mci, rcode, true);
3488                                 giveresponse(rcode, to->q_status, m, mci,
3489                                              ctladdr, xstart, e, to);
3490                                 e->e_to = tobuf + 1;
3491                                 continue;
3492                         }
3493                 }
3494                 else
3495                 {
3496                         /* mark bad addresses */
3497                         if (rcode != EX_OK)
3498                         {
3499                                 if (goodmxfound && rcode == EX_NOHOST)
3500                                         rcode = EX_TEMPFAIL;
3501                                 markfailure(e, to, mci, rcode, true);
3502                                 continue;
3503                         }
3504                 }
3505
3506                 /* successful delivery */
3507                 to->q_state = QS_SENT;
3508                 to->q_statdate = curtime();
3509                 e->e_nsent++;
3510
3511                 /*
3512                 **  Checkpoint the send list every few addresses
3513                 */
3514
3515                 if (CheckpointInterval > 0 && e->e_nsent >= CheckpointInterval)
3516                 {
3517                         queueup(e, false, false);
3518                         e->e_nsent = 0;
3519                 }
3520
3521                 if (bitnset(M_LOCALMAILER, m->m_flags) &&
3522                     bitset(QPINGONSUCCESS, to->q_flags))
3523                 {
3524                         to->q_flags |= QDELIVERED;
3525                         to->q_status = "2.1.5";
3526                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3527                                              "%s... Successfully delivered\n",
3528                                              to->q_paddr);
3529                 }
3530                 else if (bitset(QPINGONSUCCESS, to->q_flags) &&
3531                          bitset(QPRIMARY, to->q_flags) &&
3532                          !bitset(MCIF_DSN, mci->mci_flags))
3533                 {
3534                         to->q_flags |= QRELAYED;
3535                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3536                                              "%s... relayed; expect no further notifications\n",
3537                                              to->q_paddr);
3538                 }
3539                 else if (IS_DLVR_NOTIFY(e) &&
3540                          !bitset(MCIF_DLVR_BY, mci->mci_flags) &&
3541                          bitset(QPRIMARY, to->q_flags) &&
3542                          (!bitset(QHASNOTIFY, to->q_flags) ||
3543                           bitset(QPINGONSUCCESS, to->q_flags) ||
3544                           bitset(QPINGONFAILURE, to->q_flags) ||
3545                           bitset(QPINGONDELAY, to->q_flags)))
3546                 {
3547                         /* RFC 2852, 4.1.4.2: no NOTIFY, or not NEVER */
3548                         to->q_flags |= QBYNRELAY;
3549                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3550                                              "%s... Deliver-by notify: relayed\n",
3551                                              to->q_paddr);
3552                 }
3553                 else if (IS_DLVR_TRACE(e) &&
3554                          (!bitset(QHASNOTIFY, to->q_flags) ||
3555                           bitset(QPINGONSUCCESS, to->q_flags) ||
3556                           bitset(QPINGONFAILURE, to->q_flags) ||
3557                           bitset(QPINGONDELAY, to->q_flags)) &&
3558                          bitset(QPRIMARY, to->q_flags))
3559                 {
3560                         /* RFC 2852, 4.1.4: no NOTIFY, or not NEVER */
3561                         to->q_flags |= QBYTRACE;
3562                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3563                                              "%s... Deliver-By trace: relayed\n",
3564                                              to->q_paddr);
3565                 }
3566         }
3567
3568         if (bitnset(M_LMTP, m->m_flags))
3569         {
3570                 /*
3571                 **  Global information applies to the last recipient only;
3572                 **  clear it out to avoid bogus errors.
3573                 */
3574
3575                 rcode = EX_OK;
3576                 e->e_statmsg = NULL;
3577
3578                 /* reset the mci state for the next transaction */
3579                 if (mci != NULL &&
3580                     (mci->mci_state == MCIS_MAIL ||
3581                      mci->mci_state == MCIS_RCPT ||
3582                      mci->mci_state == MCIS_DATA))
3583                 {
3584                         mci->mci_state = MCIS_OPEN;
3585                         SmtpPhase = mci->mci_phase = "idle";
3586                         sm_setproctitle(true, e, "%s: %s", CurHostName,
3587                                         mci->mci_phase);
3588                 }
3589         }
3590
3591         if (tobuf[0] != '\0')
3592         {
3593                 giveresponse(rcode, NULL, m, mci, ctladdr, xstart, e, tochain);
3594 #if 0
3595                 /*
3596                 **  This code is disabled for now because I am not
3597                 **  sure that copying status from the first recipient
3598                 **  to all non-status'ed recipients is a good idea.
3599                 */
3600
3601                 if (tochain->q_message != NULL &&
3602                     !bitnset(M_LMTP, m->m_flags) && rcode != EX_OK)
3603                 {
3604                         for (to = tochain->q_tchain; to != NULL;
3605                              to = to->q_tchain)
3606                         {
3607                                 /* see if address already marked */
3608                                 if (QS_IS_QUEUEUP(to->q_state) &&
3609                                     to->q_message == NULL)
3610                                         to->q_message = sm_rpool_strdup_x(e->e_rpool,
3611                                                         tochain->q_message);
3612                         }
3613                 }
3614 #endif /* 0 */
3615         }
3616         if (anyok)
3617                 markstats(e, tochain, STATS_NORMAL);
3618         mci_store_persistent(mci);
3619
3620         /* Some recipients were tempfailed, try them on the next host */
3621         if (mci != NULL && mci->mci_retryrcpt && nummxhosts > hostnum)
3622         {
3623                 /* try next MX site */
3624                 goto tryhost;
3625         }
3626
3627         /* now close the connection */
3628         if (clever && mci != NULL && mci->mci_state != MCIS_CLOSED &&
3629             !bitset(MCIF_CACHED, mci->mci_flags))
3630                 smtpquit(m, mci, e);
3631
3632 cleanup: ;
3633         }
3634         SM_FINALLY
3635         {
3636                 /*
3637                 **  Restore state and return.
3638                 */
3639 #if XDEBUG
3640                 char wbuf[MAXLINE];
3641
3642                 /* make absolutely certain 0, 1, and 2 are in use */
3643                 (void) sm_snprintf(wbuf, sizeof(wbuf),
3644                                    "%s... end of deliver(%s)",
3645                                    e->e_to == NULL ? "NO-TO-LIST"
3646                                                    : shortenstring(e->e_to,
3647                                                                    MAXSHORTSTR),
3648                                   m->m_name);
3649                 checkfd012(wbuf);
3650 #endif /* XDEBUG */
3651
3652                 errno = 0;
3653
3654                 /*
3655                 **  It was originally necessary to set macro 'g' to NULL
3656                 **  because it previously pointed to an auto buffer.
3657                 **  We don't do this any more, so this may be unnecessary.
3658                 */
3659
3660                 macdefine(&e->e_macro, A_PERM, 'g', (char *) NULL);
3661                 e->e_to = NULL;
3662         }
3663         SM_END_TRY
3664         return rcode;
3665 }
3666
3667 /*
3668 **  MARKFAILURE -- mark a failure on a specific address.
3669 **
3670 **      Parameters:
3671 **              e -- the envelope we are sending.
3672 **              q -- the address to mark.
3673 **              mci -- mailer connection information.
3674 **              rcode -- the code signifying the particular failure.
3675 **              ovr -- override an existing code?
3676 **
3677 **      Returns:
3678 **              none.
3679 **
3680 **      Side Effects:
3681 **              marks the address (and possibly the envelope) with the
3682 **                      failure so that an error will be returned or
3683 **                      the message will be queued, as appropriate.
3684 */
3685
3686 void
3687 markfailure(e, q, mci, rcode, ovr)
3688         register ENVELOPE *e;
3689         register ADDRESS *q;
3690         register MCI *mci;
3691         int rcode;
3692         bool ovr;
3693 {
3694         int save_errno = errno;
3695         char *status = NULL;
3696         char *rstatus = NULL;
3697
3698         switch (rcode)
3699         {
3700           case EX_OK:
3701                 break;
3702
3703           case EX_TEMPFAIL:
3704           case EX_IOERR:
3705           case EX_OSERR:
3706                 q->q_state = QS_QUEUEUP;
3707                 break;
3708
3709           default:
3710                 q->q_state = QS_BADADDR;
3711                 break;
3712         }
3713
3714         /* find most specific error code possible */
3715         if (mci != NULL && mci->mci_status != NULL)
3716         {
3717                 status = sm_rpool_strdup_x(e->e_rpool, mci->mci_status);
3718                 if (mci->mci_rstatus != NULL)
3719                         rstatus = sm_rpool_strdup_x(e->e_rpool,
3720                                                     mci->mci_rstatus);
3721                 else
3722                         rstatus = NULL;
3723         }
3724         else if (e->e_status != NULL)
3725         {
3726                 status = e->e_status;
3727                 rstatus = NULL;
3728         }
3729         else
3730         {
3731                 switch (rcode)
3732                 {
3733                   case EX_USAGE:
3734                         status = "5.5.4";
3735                         break;
3736
3737                   case EX_DATAERR:
3738                         status = "5.5.2";
3739                         break;
3740
3741                   case EX_NOUSER:
3742                         status = "5.1.1";
3743                         break;
3744
3745                   case EX_NOHOST:
3746                         status = "5.1.2";
3747                         break;
3748
3749                   case EX_NOINPUT:
3750                   case EX_CANTCREAT:
3751                   case EX_NOPERM:
3752                         status = "5.3.0";
3753                         break;
3754
3755                   case EX_UNAVAILABLE:
3756                   case EX_SOFTWARE:
3757                   case EX_OSFILE:
3758                   case EX_PROTOCOL:
3759                   case EX_CONFIG:
3760                         status = "5.5.0";
3761                         break;
3762
3763                   case EX_OSERR:
3764                   case EX_IOERR:
3765                         status = "4.5.0";
3766                         break;
3767
3768                   case EX_TEMPFAIL:
3769                         status = "4.2.0";
3770                         break;
3771                 }
3772         }
3773
3774         /* new status? */
3775         if (status != NULL && *status != '\0' && (ovr || q->q_status == NULL ||
3776             *q->q_status == '\0' || *q->q_status < *status))
3777         {
3778                 q->q_status = status;
3779                 q->q_rstatus = rstatus;
3780         }
3781         if (rcode != EX_OK && q->q_rstatus == NULL &&
3782             q->q_mailer != NULL && q->q_mailer->m_diagtype != NULL &&
3783             sm_strcasecmp(q->q_mailer->m_diagtype, "X-UNIX") == 0)
3784         {
3785                 char buf[16];
3786
3787                 (void) sm_snprintf(buf, sizeof(buf), "%d", rcode);
3788                 q->q_rstatus = sm_rpool_strdup_x(e->e_rpool, buf);
3789         }
3790
3791         q->q_statdate = curtime();
3792         if (CurHostName != NULL && CurHostName[0] != '\0' &&
3793             mci != NULL && !bitset(M_LOCALMAILER, mci->mci_flags))
3794                 q->q_statmta = sm_rpool_strdup_x(e->e_rpool, CurHostName);
3795
3796         /* restore errno */
3797         errno = save_errno;
3798 }
3799 /*
3800 **  ENDMAILER -- Wait for mailer to terminate.
3801 **
3802 **      We should never get fatal errors (e.g., segmentation
3803 **      violation), so we report those specially.  For other
3804 **      errors, we choose a status message (into statmsg),
3805 **      and if it represents an error, we print it.
3806 **
3807 **      Parameters:
3808 **              mci -- the mailer connection info.
3809 **              e -- the current envelope.
3810 **              pv -- the parameter vector that invoked the mailer
3811 **                      (for error messages).
3812 **
3813 **      Returns:
3814 **              exit code of mailer.
3815 **
3816 **      Side Effects:
3817 **              none.
3818 */
3819
3820 static jmp_buf  EndWaitTimeout;
3821
3822 static void
3823 endwaittimeout(ignore)
3824         int ignore;
3825 {
3826         /*
3827         **  NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
3828         **      ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
3829         **      DOING.
3830         */
3831
3832         errno = ETIMEDOUT;
3833         longjmp(EndWaitTimeout, 1);
3834 }
3835
3836 int
3837 endmailer(mci, e, pv)
3838         register MCI *mci;
3839         register ENVELOPE *e;
3840         char **pv;
3841 {
3842         int st;
3843         int save_errno = errno;
3844         char buf[MAXLINE];
3845         SM_EVENT *ev = NULL;
3846
3847
3848         mci_unlock_host(mci);
3849
3850         /* close output to mailer */
3851         if (mci->mci_out != NULL)
3852         {
3853                 (void) sm_io_close(mci->mci_out, SM_TIME_DEFAULT);
3854                 mci->mci_out = NULL;
3855         }
3856
3857         /* copy any remaining input to transcript */
3858         if (mci->mci_in != NULL && mci->mci_state != MCIS_ERROR &&
3859             e->e_xfp != NULL)
3860         {
3861                 while (sfgets(buf, sizeof(buf), mci->mci_in,
3862                               TimeOuts.to_quit, "Draining Input") != NULL)
3863                         (void) sm_io_fputs(e->e_xfp, SM_TIME_DEFAULT, buf);
3864         }
3865
3866 #if SASL
3867         /* close SASL connection */
3868         if (bitset(MCIF_AUTHACT, mci->mci_flags))
3869         {
3870                 sasl_dispose(&mci->mci_conn);
3871                 mci->mci_flags &= ~MCIF_AUTHACT;
3872         }
3873 #endif /* SASL */
3874
3875 #if STARTTLS
3876         /* shutdown TLS */
3877         (void) endtlsclt(mci);
3878 #endif /* STARTTLS */
3879
3880         /* now close the input */
3881         if (mci->mci_in != NULL)
3882         {
3883                 (void) sm_io_close(mci->mci_in, SM_TIME_DEFAULT);
3884                 mci->mci_in = NULL;
3885         }
3886         mci->mci_state = MCIS_CLOSED;
3887
3888         errno = save_errno;
3889
3890         /* in the IPC case there is nothing to wait for */
3891         if (mci->mci_pid == 0)
3892                 return EX_OK;
3893
3894         /* put a timeout around the wait */
3895         if (mci->mci_mailer->m_wait > 0)
3896         {
3897                 if (setjmp(EndWaitTimeout) == 0)
3898                         ev = sm_setevent(mci->mci_mailer->m_wait,
3899                                          endwaittimeout, 0);
3900                 else
3901                 {
3902                         syserr("endmailer %s: wait timeout (%ld)",
3903                                mci->mci_mailer->m_name,
3904                                (long) mci->mci_mailer->m_wait);
3905                         return EX_TEMPFAIL;
3906                 }
3907         }
3908
3909         /* wait for the mailer process, collect status */
3910         st = waitfor(mci->mci_pid);
3911         save_errno = errno;
3912         if (ev != NULL)
3913                 sm_clrevent(ev);
3914         errno = save_errno;
3915
3916         if (st == -1)
3917         {
3918                 syserr("endmailer %s: wait", mci->mci_mailer->m_name);
3919                 return EX_SOFTWARE;
3920         }
3921
3922         if (WIFEXITED(st))
3923         {
3924                 /* normal death -- return status */
3925                 return (WEXITSTATUS(st));
3926         }
3927
3928         /* it died a horrid death */
3929         syserr("451 4.3.0 mailer %s died with signal %d%s",
3930                 mci->mci_mailer->m_name, WTERMSIG(st),
3931                 WCOREDUMP(st) ? " (core dumped)" :
3932                 (WIFSTOPPED(st) ? " (stopped)" : ""));
3933
3934         /* log the arguments */
3935         if (pv != NULL && e->e_xfp != NULL)
3936         {
3937                 register char **av;
3938
3939                 (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, "Arguments:");
3940                 for (av = pv; *av != NULL; av++)
3941                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, " %s",
3942                                              *av);
3943                 (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, "\n");
3944         }
3945
3946         ExitStat = EX_TEMPFAIL;
3947         return EX_TEMPFAIL;
3948 }
3949 /*
3950 **  GIVERESPONSE -- Interpret an error response from a mailer
3951 **
3952 **      Parameters:
3953 **              status -- the status code from the mailer (high byte
3954 **                      only; core dumps must have been taken care of
3955 **                      already).
3956 **              dsn -- the DSN associated with the address, if any.
3957 **              m -- the mailer info for this mailer.
3958 **              mci -- the mailer connection info -- can be NULL if the
3959 **                      response is given before the connection is made.
3960 **              ctladdr -- the controlling address for the recipient
3961 **                      address(es).
3962 **              xstart -- the transaction start time, for computing
3963 **                      transaction delays.
3964 **              e -- the current envelope.
3965 **              to -- the current recipient (NULL if none).
3966 **
3967 **      Returns:
3968 **              none.
3969 **
3970 **      Side Effects:
3971 **              Errors may be incremented.
3972 **              ExitStat may be set.
3973 */
3974
3975 void
3976 giveresponse(status, dsn, m, mci, ctladdr, xstart, e, to)
3977         int status;
3978         char *dsn;
3979         register MAILER *m;
3980         register MCI *mci;
3981         ADDRESS *ctladdr;
3982         time_t xstart;
3983         ENVELOPE *e;
3984         ADDRESS *to;
3985 {
3986         register const char *statmsg;
3987         int errnum = errno;
3988         int off = 4;
3989         bool usestat = false;
3990         char dsnbuf[ENHSCLEN];
3991         char buf[MAXLINE];
3992         char *exmsg;
3993
3994         if (e == NULL)
3995         {
3996                 syserr("giveresponse: null envelope");
3997                 /* NOTREACHED */
3998                 SM_ASSERT(0);
3999         }
4000
4001         /*
4002         **  Compute status message from code.
4003         */
4004
4005         exmsg = sm_sysexmsg(status);
4006         if (status == 0)
4007         {
4008                 statmsg = "250 2.0.0 Sent";
4009                 if (e->e_statmsg != NULL)
4010                 {
4011                         (void) sm_snprintf(buf, sizeof(buf), "%s (%s)",
4012                                            statmsg,
4013                                            shortenstring(e->e_statmsg, 403));
4014                         statmsg = buf;
4015                 }
4016         }
4017         else if (exmsg == NULL)
4018         {
4019                 (void) sm_snprintf(buf, sizeof(buf),
4020                                    "554 5.3.0 unknown mailer error %d",
4021                                    status);
4022                 status = EX_UNAVAILABLE;
4023                 statmsg = buf;
4024                 usestat = true;
4025         }
4026         else if (status == EX_TEMPFAIL)
4027         {
4028                 char *bp = buf;
4029
4030                 (void) sm_strlcpy(bp, exmsg + 1, SPACELEFT(buf, bp));
4031                 bp += strlen(bp);
4032 #if NAMED_BIND
4033                 if (h_errno == TRY_AGAIN)
4034                         statmsg = sm_errstring(h_errno + E_DNSBASE);
4035                 else
4036 #endif /* NAMED_BIND */
4037                 {
4038                         if (errnum != 0)
4039                                 statmsg = sm_errstring(errnum);
4040                         else
4041                                 statmsg = SmtpError;
4042                 }
4043                 if (statmsg != NULL && statmsg[0] != '\0')
4044                 {
4045                         switch (errnum)
4046                         {
4047 #ifdef ENETDOWN
4048                           case ENETDOWN:        /* Network is down */
4049 #endif /* ENETDOWN */
4050 #ifdef ENETUNREACH
4051                           case ENETUNREACH:     /* Network is unreachable */
4052 #endif /* ENETUNREACH */
4053 #ifdef ENETRESET
4054                           case ENETRESET:       /* Network dropped connection on reset */
4055 #endif /* ENETRESET */
4056 #ifdef ECONNABORTED
4057                           case ECONNABORTED:    /* Software caused connection abort */
4058 #endif /* ECONNABORTED */
4059 #ifdef EHOSTDOWN
4060                           case EHOSTDOWN:       /* Host is down */
4061 #endif /* EHOSTDOWN */
4062 #ifdef EHOSTUNREACH
4063                           case EHOSTUNREACH:    /* No route to host */
4064 #endif /* EHOSTUNREACH */
4065                                 if (mci != NULL && mci->mci_host != NULL)
4066                                 {
4067                                         (void) sm_strlcpyn(bp,
4068                                                            SPACELEFT(buf, bp),
4069                                                            2, ": ",
4070                                                            mci->mci_host);
4071                                         bp += strlen(bp);
4072                                 }
4073                                 break;
4074                         }
4075                         (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ": ",
4076                                            statmsg);
4077                         usestat = true;
4078                 }
4079                 statmsg = buf;
4080         }
4081 #if NAMED_BIND
4082         else if (status == EX_NOHOST && h_errno != 0)
4083         {
4084                 statmsg = sm_errstring(h_errno + E_DNSBASE);
4085                 (void) sm_snprintf(buf, sizeof(buf), "%s (%s)", exmsg + 1,
4086                                    statmsg);
4087                 statmsg = buf;
4088                 usestat = true;
4089         }
4090 #endif /* NAMED_BIND */
4091         else
4092         {
4093                 statmsg = exmsg;
4094                 if (*statmsg++ == ':' && errnum != 0)
4095                 {
4096                         (void) sm_snprintf(buf, sizeof(buf), "%s: %s", statmsg,
4097                                            sm_errstring(errnum));
4098                         statmsg = buf;
4099                         usestat = true;
4100                 }
4101                 else if (bitnset(M_LMTP, m->m_flags) && e->e_statmsg != NULL)
4102                 {
4103                         (void) sm_snprintf(buf, sizeof(buf), "%s (%s)", statmsg,
4104                                            shortenstring(e->e_statmsg, 403));
4105                         statmsg = buf;
4106                         usestat = true;
4107                 }
4108         }
4109
4110         /*
4111         **  Print the message as appropriate
4112         */
4113
4114         if (status == EX_OK || status == EX_TEMPFAIL)
4115         {
4116                 extern char MsgBuf[];
4117
4118                 if ((off = isenhsc(statmsg + 4, ' ')) > 0)
4119                 {
4120                         if (dsn == NULL)
4121                         {
4122                                 (void) sm_snprintf(dsnbuf, sizeof(dsnbuf),
4123                                                    "%.*s", off, statmsg + 4);
4124                                 dsn = dsnbuf;
4125                         }
4126                         off += 5;
4127                 }
4128                 else
4129                 {
4130                         off = 4;
4131                 }
4132                 message("%s", statmsg + off);
4133                 if (status == EX_TEMPFAIL && e->e_xfp != NULL)
4134                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, "%s\n",
4135                                              &MsgBuf[4]);
4136         }
4137         else
4138         {
4139                 char mbuf[ENHSCLEN + 4];
4140
4141                 Errors++;
4142                 if ((off = isenhsc(statmsg + 4, ' ')) > 0 &&
4143                     off < sizeof(mbuf) - 4)
4144                 {
4145                         if (dsn == NULL)
4146                         {
4147                                 (void) sm_snprintf(dsnbuf, sizeof(dsnbuf),
4148                                                    "%.*s", off, statmsg + 4);
4149                                 dsn = dsnbuf;
4150                         }
4151                         off += 5;
4152
4153                         /* copy only part of statmsg to mbuf */
4154                         (void) sm_strlcpy(mbuf, statmsg, off);
4155                         (void) sm_strlcat(mbuf, " %s", sizeof(mbuf));
4156                 }
4157                 else
4158                 {
4159                         dsnbuf[0] = '\0';
4160                         (void) sm_snprintf(mbuf, sizeof(mbuf), "%.3s %%s",
4161                                            statmsg);
4162                         off = 4;
4163                 }
4164                 usrerr(mbuf, &statmsg[off]);
4165         }
4166
4167         /*
4168         **  Final cleanup.
4169         **      Log a record of the transaction.  Compute the new
4170         **      ExitStat -- if we already had an error, stick with
4171         **      that.
4172         */
4173
4174         if (OpMode != MD_VERIFY && !bitset(EF_VRFYONLY, e->e_flags) &&
4175             LogLevel > ((status == EX_TEMPFAIL) ? 8 : (status == EX_OK) ? 7 : 6))
4176                 logdelivery(m, mci, dsn, statmsg + off, ctladdr, xstart, e);
4177
4178         if (tTd(11, 2))
4179                 sm_dprintf("giveresponse: status=%d, dsn=%s, e->e_message=%s, errnum=%d\n",
4180                            status,
4181                            dsn == NULL ? "<NULL>" : dsn,
4182                            e->e_message == NULL ? "<NULL>" : e->e_message,
4183                            errnum);
4184
4185         if (status != EX_TEMPFAIL)
4186                 setstat(status);
4187         if (status != EX_OK && (status != EX_TEMPFAIL || e->e_message == NULL))
4188                 e->e_message = sm_rpool_strdup_x(e->e_rpool, statmsg + off);
4189         if (status != EX_OK && to != NULL && to->q_message == NULL)
4190         {
4191                 if (!usestat && e->e_message != NULL)
4192                         to->q_message = sm_rpool_strdup_x(e->e_rpool,
4193                                                           e->e_message);
4194                 else
4195                         to->q_message = sm_rpool_strdup_x(e->e_rpool,
4196                                                           statmsg + off);
4197         }
4198         errno = 0;
4199         SM_SET_H_ERRNO(0);
4200 }
4201 /*
4202 **  LOGDELIVERY -- log the delivery in the system log
4203 **
4204 **      Care is taken to avoid logging lines that are too long, because
4205 **      some versions of syslog have an unfortunate proclivity for core
4206 **      dumping.  This is a hack, to be sure, that is at best empirical.
4207 **
4208 **      Parameters:
4209 **              m -- the mailer info.  Can be NULL for initial queue.
4210 **              mci -- the mailer connection info -- can be NULL if the
4211 **                      log is occurring when no connection is active.
4212 **              dsn -- the DSN attached to the status.
4213 **              status -- the message to print for the status.
4214 **              ctladdr -- the controlling address for the to list.
4215 **              xstart -- the transaction start time, used for
4216 **                      computing transaction delay.
4217 **              e -- the current envelope.
4218 **
4219 **      Returns:
4220 **              none
4221 **
4222 **      Side Effects:
4223 **              none
4224 */
4225
4226 void
4227 logdelivery(m, mci, dsn, status, ctladdr, xstart, e)
4228         MAILER *m;
4229         register MCI *mci;
4230         char *dsn;
4231         const char *status;
4232         ADDRESS *ctladdr;
4233         time_t xstart;
4234         register ENVELOPE *e;
4235 {
4236         register char *bp;
4237         register char *p;
4238         int l;
4239         time_t now = curtime();
4240         char buf[1024];
4241
4242 #if (SYSLOG_BUFSIZE) >= 256
4243         /* ctladdr: max 106 bytes */
4244         bp = buf;
4245         if (ctladdr != NULL)
4246         {
4247                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", ctladdr=",
4248                                    shortenstring(ctladdr->q_paddr, 83));
4249                 bp += strlen(bp);
4250                 if (bitset(QGOODUID, ctladdr->q_flags))
4251                 {
4252                         (void) sm_snprintf(bp, SPACELEFT(buf, bp), " (%d/%d)",
4253                                            (int) ctladdr->q_uid,
4254                                            (int) ctladdr->q_gid);
4255                         bp += strlen(bp);
4256                 }
4257         }
4258
4259         /* delay & xdelay: max 41 bytes */
4260         (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", delay=",
4261                            pintvl(now - e->e_ctime, true));
4262         bp += strlen(bp);
4263
4264         if (xstart != (time_t) 0)
4265         {
4266                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", xdelay=",
4267                                    pintvl(now - xstart, true));
4268                 bp += strlen(bp);
4269         }
4270
4271         /* mailer: assume about 19 bytes (max 10 byte mailer name) */
4272         if (m != NULL)
4273         {
4274                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", mailer=",
4275                                    m->m_name);
4276                 bp += strlen(bp);
4277         }
4278
4279         /* pri: changes with each delivery attempt */
4280         (void) sm_snprintf(bp, SPACELEFT(buf, bp), ", pri=%ld",
4281                 PRT_NONNEGL(e->e_msgpriority));
4282         bp += strlen(bp);
4283
4284         /* relay: max 66 bytes for IPv4 addresses */
4285         if (mci != NULL && mci->mci_host != NULL)
4286         {
4287                 extern SOCKADDR CurHostAddr;
4288
4289                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", relay=",
4290                                    shortenstring(mci->mci_host, 40));
4291                 bp += strlen(bp);
4292
4293                 if (CurHostAddr.sa.sa_family != 0)
4294                 {
4295                         (void) sm_snprintf(bp, SPACELEFT(buf, bp), " [%s]",
4296                                            anynet_ntoa(&CurHostAddr));
4297                 }
4298         }
4299         else if (strcmp(status, "quarantined") == 0)
4300         {
4301                 if (e->e_quarmsg != NULL)
4302                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4303                                            ", quarantine=%s",
4304                                            shortenstring(e->e_quarmsg, 40));
4305         }
4306         else if (strcmp(status, "queued") != 0)
4307         {
4308                 p = macvalue('h', e);
4309                 if (p != NULL && p[0] != '\0')
4310                 {
4311                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4312                                            ", relay=%s", shortenstring(p, 40));
4313                 }
4314         }
4315         bp += strlen(bp);
4316
4317         /* dsn */
4318         if (dsn != NULL && *dsn != '\0')
4319         {
4320                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", dsn=",
4321                                    shortenstring(dsn, ENHSCLEN));
4322                 bp += strlen(bp);
4323         }
4324
4325 #if _FFR_LOG_NTRIES
4326         /* ntries */
4327         if (e->e_ntries >= 0)
4328         {
4329                 (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4330                                    ", ntries=%d", e->e_ntries + 1);
4331                 bp += strlen(bp);
4332         }
4333 #endif /* _FFR_LOG_NTRIES */
4334
4335 # define STATLEN                (((SYSLOG_BUFSIZE) - 100) / 4)
4336 # if (STATLEN) < 63
4337 #  undef STATLEN
4338 #  define STATLEN       63
4339 # endif /* (STATLEN) < 63 */
4340 # if (STATLEN) > 203
4341 #  undef STATLEN
4342 #  define STATLEN       203
4343 # endif /* (STATLEN) > 203 */
4344
4345         /* stat: max 210 bytes */
4346         if ((bp - buf) > (sizeof(buf) - ((STATLEN) + 20)))
4347         {
4348                 /* desperation move -- truncate data */
4349                 bp = buf + sizeof(buf) - ((STATLEN) + 17);
4350                 (void) sm_strlcpy(bp, "...", SPACELEFT(buf, bp));
4351                 bp += 3;
4352         }
4353
4354         (void) sm_strlcpy(bp, ", stat=", SPACELEFT(buf, bp));
4355         bp += strlen(bp);
4356
4357         (void) sm_strlcpy(bp, shortenstring(status, STATLEN),
4358                           SPACELEFT(buf, bp));
4359
4360         /* id, to: max 13 + TOBUFSIZE bytes */
4361         l = SYSLOG_BUFSIZE - 100 - strlen(buf);
4362         if (l < 0)
4363                 l = 0;
4364         p = e->e_to == NULL ? "NO-TO-LIST" : e->e_to;
4365         while (strlen(p) >= l)
4366         {
4367                 register char *q;
4368
4369                 for (q = p + l; q > p; q--)
4370                 {
4371                         if (*q == ',')
4372                                 break;
4373                 }
4374                 if (p == q)
4375                         break;
4376                 sm_syslog(LOG_INFO, e->e_id, "to=%.*s [more]%s",
4377                           (int) (++q - p), p, buf);
4378                 p = q;
4379         }
4380         sm_syslog(LOG_INFO, e->e_id, "to=%.*s%s", l, p, buf);
4381
4382 #else /* (SYSLOG_BUFSIZE) >= 256 */
4383
4384         l = SYSLOG_BUFSIZE - 85;
4385         if (l < 0)
4386                 l = 0;
4387         p = e->e_to == NULL ? "NO-TO-LIST" : e->e_to;
4388         while (strlen(p) >= l)
4389         {
4390                 register char *q;
4391
4392                 for (q = p + l; q > p; q--)
4393                 {
4394                         if (*q == ',')
4395                                 break;
4396                 }
4397                 if (p == q)
4398                         break;
4399
4400                 sm_syslog(LOG_INFO, e->e_id, "to=%.*s [more]",
4401                           (int) (++q - p), p);
4402                 p = q;
4403         }
4404         sm_syslog(LOG_INFO, e->e_id, "to=%.*s", l, p);
4405
4406         if (ctladdr != NULL)
4407         {
4408                 bp = buf;
4409                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, "ctladdr=",
4410                                    shortenstring(ctladdr->q_paddr, 83));
4411                 bp += strlen(bp);
4412                 if (bitset(QGOODUID, ctladdr->q_flags))
4413                 {
4414                         (void) sm_snprintf(bp, SPACELEFT(buf, bp), " (%d/%d)",
4415                                            ctladdr->q_uid, ctladdr->q_gid);
4416                         bp += strlen(bp);
4417                 }
4418                 sm_syslog(LOG_INFO, e->e_id, "%s", buf);
4419         }
4420         bp = buf;
4421         (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, "delay=",
4422                            pintvl(now - e->e_ctime, true));
4423         bp += strlen(bp);
4424         if (xstart != (time_t) 0)
4425         {
4426                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", xdelay=",
4427                                    pintvl(now - xstart, true));
4428                 bp += strlen(bp);
4429         }
4430
4431         if (m != NULL)
4432         {
4433                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", mailer=",
4434                                    m->m_name);
4435                 bp += strlen(bp);
4436         }
4437         sm_syslog(LOG_INFO, e->e_id, "%.1000s", buf);
4438
4439         buf[0] = '\0';
4440         bp = buf;
4441         if (mci != NULL && mci->mci_host != NULL)
4442         {
4443                 extern SOCKADDR CurHostAddr;
4444
4445                 (void) sm_snprintf(bp, SPACELEFT(buf, bp), "relay=%.100s",
4446                                    mci->mci_host);
4447                 bp += strlen(bp);
4448
4449                 if (CurHostAddr.sa.sa_family != 0)
4450                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4451                                            " [%.100s]",
4452                                            anynet_ntoa(&CurHostAddr));
4453         }
4454         else if (strcmp(status, "quarantined") == 0)
4455         {
4456                 if (e->e_quarmsg != NULL)
4457                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4458                                            ", quarantine=%.100s",
4459                                            e->e_quarmsg);
4460         }
4461         else if (strcmp(status, "queued") != 0)
4462         {
4463                 p = macvalue('h', e);
4464                 if (p != NULL && p[0] != '\0')
4465                         (void) sm_snprintf(buf, sizeof(buf), "relay=%.100s", p);
4466         }
4467         if (buf[0] != '\0')
4468                 sm_syslog(LOG_INFO, e->e_id, "%.1000s", buf);
4469
4470         sm_syslog(LOG_INFO, e->e_id, "stat=%s", shortenstring(status, 63));
4471 #endif /* (SYSLOG_BUFSIZE) >= 256 */
4472 }
4473 /*
4474 **  PUTFROMLINE -- output a UNIX-style from line (or whatever)
4475 **
4476 **      This can be made an arbitrary message separator by changing $l
4477 **
4478 **      One of the ugliest hacks seen by human eyes is contained herein:
4479 **      UUCP wants those stupid "remote from <host>" lines.  Why oh why
4480 **      does a well-meaning programmer such as myself have to deal with
4481 **      this kind of antique garbage????
4482 **
4483 **      Parameters:
4484 **              mci -- the connection information.
4485 **              e -- the envelope.
4486 **
4487 **      Returns:
4488 **              true iff line was written successfully
4489 **
4490 **      Side Effects:
4491 **              outputs some text to fp.
4492 */
4493
4494 bool
4495 putfromline(mci, e)
4496         register MCI *mci;
4497         ENVELOPE *e;
4498 {
4499         char *template = UnixFromLine;
4500         char buf[MAXLINE];
4501         char xbuf[MAXLINE];
4502
4503         if (bitnset(M_NHDR, mci->mci_mailer->m_flags))
4504                 return true;
4505
4506         mci->mci_flags |= MCIF_INHEADER;
4507
4508         if (bitnset(M_UGLYUUCP, mci->mci_mailer->m_flags))
4509         {
4510                 char *bang;
4511
4512                 expand("\201g", buf, sizeof(buf), e);
4513                 bang = strchr(buf, '!');
4514                 if (bang == NULL)
4515                 {
4516                         char *at;
4517                         char hname[MAXNAME];
4518
4519                         /*
4520                         **  If we can construct a UUCP path, do so
4521                         */
4522
4523                         at = strrchr(buf, '@');
4524                         if (at == NULL)
4525                         {
4526                                 expand("\201k", hname, sizeof(hname), e);
4527                                 at = hname;
4528                         }
4529                         else
4530                                 *at++ = '\0';
4531                         (void) sm_snprintf(xbuf, sizeof(xbuf),
4532                                            "From %.800s  \201d remote from %.100s\n",
4533                                            buf, at);
4534                 }
4535                 else
4536                 {
4537                         *bang++ = '\0';
4538                         (void) sm_snprintf(xbuf, sizeof(xbuf),
4539                                            "From %.800s  \201d remote from %.100s\n",
4540                                            bang, buf);
4541                         template = xbuf;
4542                 }
4543         }
4544         expand(template, buf, sizeof(buf), e);
4545         return putxline(buf, strlen(buf), mci, PXLF_HEADER);
4546 }
4547
4548 /*
4549 **  PUTBODY -- put the body of a message.
4550 **
4551 **      Parameters:
4552 **              mci -- the connection information.
4553 **              e -- the envelope to put out.
4554 **              separator -- if non-NULL, a message separator that must
4555 **                      not be permitted in the resulting message.
4556 **
4557 **      Returns:
4558 **              true iff message was written successfully
4559 **
4560 **      Side Effects:
4561 **              The message is written onto fp.
4562 */
4563
4564 /* values for output state variable */
4565 #define OSTATE_HEAD     0       /* at beginning of line */
4566 #define OSTATE_CR       1       /* read a carriage return */
4567 #define OSTATE_INLINE   2       /* putting rest of line */
4568
4569 bool
4570 putbody(mci, e, separator)
4571         register MCI *mci;
4572         register ENVELOPE *e;
4573         char *separator;
4574 {
4575         bool dead = false;
4576         bool ioerr = false;
4577         int save_errno;
4578         char buf[MAXLINE];
4579 #if MIME8TO7
4580         char *boundaries[MAXMIMENESTING + 1];
4581 #endif /* MIME8TO7 */
4582
4583         /*
4584         **  Output the body of the message
4585         */
4586
4587         if (e->e_dfp == NULL && bitset(EF_HAS_DF, e->e_flags))
4588         {
4589                 char *df = queuename(e, DATAFL_LETTER);
4590
4591                 e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, df,
4592                                       SM_IO_RDONLY_B, NULL);
4593                 if (e->e_dfp == NULL)
4594                 {
4595                         char *msg = "!putbody: Cannot open %s for %s from %s";
4596
4597                         if (errno == ENOENT)
4598                                 msg++;
4599                         syserr(msg, df, e->e_to, e->e_from.q_paddr);
4600                 }
4601
4602         }
4603         if (e->e_dfp == NULL)
4604         {
4605                 if (bitset(MCIF_INHEADER, mci->mci_flags))
4606                 {
4607                         if (!putline("", mci))
4608                                 goto writeerr;
4609                         mci->mci_flags &= ~MCIF_INHEADER;
4610                 }
4611                 if (!putline("<<< No Message Collected >>>", mci))
4612                         goto writeerr;
4613                 goto endofmessage;
4614         }
4615
4616         if (e->e_dfino == (ino_t) 0)
4617         {
4618                 struct stat stbuf;
4619
4620                 if (fstat(sm_io_getinfo(e->e_dfp, SM_IO_WHAT_FD, NULL), &stbuf)
4621                     < 0)
4622                         e->e_dfino = -1;
4623                 else
4624                 {
4625                         e->e_dfdev = stbuf.st_dev;
4626                         e->e_dfino = stbuf.st_ino;
4627                 }
4628         }
4629
4630         /* paranoia: the data file should always be in a rewound state */
4631         (void) bfrewind(e->e_dfp);
4632
4633         /* simulate an I/O timeout when used as source */
4634         if (tTd(84, 101))
4635                 sleep(319);
4636
4637 #if MIME8TO7
4638         if (bitset(MCIF_CVT8TO7, mci->mci_flags))
4639         {
4640                 /*
4641                 **  Do 8 to 7 bit MIME conversion.
4642                 */
4643
4644                 /* make sure it looks like a MIME message */
4645                 if (hvalue("MIME-Version", e->e_header) == NULL &&
4646                     !putline("MIME-Version: 1.0", mci))
4647                         goto writeerr;
4648
4649                 if (hvalue("Content-Type", e->e_header) == NULL)
4650                 {
4651                         (void) sm_snprintf(buf, sizeof(buf),
4652                                            "Content-Type: text/plain; charset=%s",
4653                                            defcharset(e));
4654                         if (!putline(buf, mci))
4655                                 goto writeerr;
4656                 }
4657
4658                 /* now do the hard work */
4659                 boundaries[0] = NULL;
4660                 mci->mci_flags |= MCIF_INHEADER;
4661                 if (mime8to7(mci, e->e_header, e, boundaries, M87F_OUTER, 0) ==
4662                                                                 SM_IO_EOF)
4663                         goto writeerr;
4664         }
4665 # if MIME7TO8
4666         else if (bitset(MCIF_CVT7TO8, mci->mci_flags))
4667         {
4668                 if (!mime7to8(mci, e->e_header, e))
4669                         goto writeerr;
4670         }
4671 # endif /* MIME7TO8 */
4672         else if (MaxMimeHeaderLength > 0 || MaxMimeFieldLength > 0)
4673         {
4674                 bool oldsuprerrs = SuprErrs;
4675
4676                 /* Use mime8to7 to check multipart for MIME header overflows */
4677                 boundaries[0] = NULL;
4678                 mci->mci_flags |= MCIF_INHEADER;
4679
4680                 /*
4681                 **  If EF_DONT_MIME is set, we have a broken MIME message
4682                 **  and don't want to generate a new bounce message whose
4683                 **  body propagates the broken MIME.  We can't just not call
4684                 **  mime8to7() as is done above since we need the security
4685                 **  checks.  The best we can do is suppress the errors.
4686                 */
4687
4688                 if (bitset(EF_DONT_MIME, e->e_flags))
4689                         SuprErrs = true;
4690
4691                 if (mime8to7(mci, e->e_header, e, boundaries,
4692                                 M87F_OUTER|M87F_NO8TO7, 0) == SM_IO_EOF)
4693                         goto writeerr;
4694
4695                 /* restore SuprErrs */
4696                 SuprErrs = oldsuprerrs;
4697         }
4698         else
4699 #endif /* MIME8TO7 */
4700         {
4701                 int ostate;
4702                 register char *bp;
4703                 register char *pbp;
4704                 register int c;
4705                 register char *xp;
4706                 int padc;
4707                 char *buflim;
4708                 int pos = 0;
4709                 char peekbuf[12];
4710
4711                 if (bitset(MCIF_INHEADER, mci->mci_flags))
4712                 {
4713                         if (!putline("", mci))
4714                                 goto writeerr;
4715                         mci->mci_flags &= ~MCIF_INHEADER;
4716                 }
4717
4718                 /* determine end of buffer; allow for short mailer lines */
4719                 buflim = &buf[sizeof(buf) - 1];
4720                 if (mci->mci_mailer->m_linelimit > 0 &&
4721                     mci->mci_mailer->m_linelimit < sizeof(buf) - 1)
4722                         buflim = &buf[mci->mci_mailer->m_linelimit - 1];
4723
4724                 /* copy temp file to output with mapping */
4725                 ostate = OSTATE_HEAD;
4726                 bp = buf;
4727                 pbp = peekbuf;
4728                 while (!sm_io_error(mci->mci_out) && !dead)
4729                 {
4730                         if (pbp > peekbuf)
4731                                 c = *--pbp;
4732                         else if ((c = sm_io_getc(e->e_dfp, SM_TIME_DEFAULT))
4733                                  == SM_IO_EOF)
4734                                 break;
4735                         if (bitset(MCIF_7BIT, mci->mci_flags))
4736                                 c &= 0x7f;
4737                         switch (ostate)
4738                         {
4739                           case OSTATE_HEAD:
4740                                 if (c == '\0' &&
4741                                     bitnset(M_NONULLS,
4742                                             mci->mci_mailer->m_flags))
4743                                         break;
4744                                 if (c != '\r' && c != '\n' && bp < buflim)
4745                                 {
4746                                         *bp++ = c;
4747                                         break;
4748                                 }
4749
4750                                 /* check beginning of line for special cases */
4751                                 *bp = '\0';
4752                                 pos = 0;
4753                                 padc = SM_IO_EOF;
4754                                 if (buf[0] == 'F' &&
4755                                     bitnset(M_ESCFROM, mci->mci_mailer->m_flags)
4756                                     && strncmp(buf, "From ", 5) == 0)
4757                                 {
4758                                         padc = '>';
4759                                 }
4760                                 if (buf[0] == '-' && buf[1] == '-' &&
4761                                     separator != NULL)
4762                                 {
4763                                         /* possible separator */
4764                                         int sl = strlen(separator);
4765
4766                                         if (strncmp(&buf[2], separator, sl)
4767                                             == 0)
4768                                                 padc = ' ';
4769                                 }
4770                                 if (buf[0] == '.' &&
4771                                     bitnset(M_XDOT, mci->mci_mailer->m_flags))
4772                                 {
4773                                         padc = '.';
4774                                 }
4775
4776                                 /* now copy out saved line */
4777                                 if (TrafficLogFile != NULL)
4778                                 {
4779                                         (void) sm_io_fprintf(TrafficLogFile,
4780                                                              SM_TIME_DEFAULT,
4781                                                              "%05d >>> ",
4782                                                              (int) CurrentPid);
4783                                         if (padc != SM_IO_EOF)
4784                                                 (void) sm_io_putc(TrafficLogFile,
4785                                                                   SM_TIME_DEFAULT,
4786                                                                   padc);
4787                                         for (xp = buf; xp < bp; xp++)
4788                                                 (void) sm_io_putc(TrafficLogFile,
4789                                                                   SM_TIME_DEFAULT,
4790                                                                   (unsigned char) *xp);
4791                                         if (c == '\n')
4792                                                 (void) sm_io_fputs(TrafficLogFile,
4793                                                                    SM_TIME_DEFAULT,
4794                                                                    mci->mci_mailer->m_eol);
4795                                 }
4796                                 if (padc != SM_IO_EOF)
4797                                 {
4798                                         if (sm_io_putc(mci->mci_out,
4799                                                        SM_TIME_DEFAULT, padc)
4800                                             == SM_IO_EOF)
4801                                         {
4802                                                 dead = true;
4803                                                 continue;
4804                                         }
4805                                         pos++;
4806                                 }
4807                                 for (xp = buf; xp < bp; xp++)
4808                                 {
4809                                         if (sm_io_putc(mci->mci_out,
4810                                                        SM_TIME_DEFAULT,
4811                                                        (unsigned char) *xp)
4812                                             == SM_IO_EOF)
4813                                         {
4814                                                 dead = true;
4815                                                 break;
4816                                         }
4817                                 }
4818                                 if (dead)
4819                                         continue;
4820                                 if (c == '\n')
4821                                 {
4822                                         if (sm_io_fputs(mci->mci_out,
4823                                                         SM_TIME_DEFAULT,
4824                                                         mci->mci_mailer->m_eol)
4825                                                         == SM_IO_EOF)
4826                                                 break;
4827                                         pos = 0;
4828                                 }
4829                                 else
4830                                 {
4831                                         pos += bp - buf;
4832                                         if (c != '\r')
4833                                         {
4834                                                 SM_ASSERT(pbp < peekbuf +
4835                                                                 sizeof(peekbuf));
4836                                                 *pbp++ = c;
4837                                         }
4838                                 }
4839
4840                                 bp = buf;
4841
4842                                 /* determine next state */
4843                                 if (c == '\n')
4844                                         ostate = OSTATE_HEAD;
4845                                 else if (c == '\r')
4846                                         ostate = OSTATE_CR;
4847                                 else
4848                                         ostate = OSTATE_INLINE;
4849                                 continue;
4850
4851                           case OSTATE_CR:
4852                                 if (c == '\n')
4853                                 {
4854                                         /* got CRLF */
4855                                         if (sm_io_fputs(mci->mci_out,
4856                                                         SM_TIME_DEFAULT,
4857                                                         mci->mci_mailer->m_eol)
4858                                                         == SM_IO_EOF)
4859                                                 continue;
4860
4861                                         if (TrafficLogFile != NULL)
4862                                         {
4863                                                 (void) sm_io_fputs(TrafficLogFile,
4864                                                                    SM_TIME_DEFAULT,
4865                                                                    mci->mci_mailer->m_eol);
4866                                         }
4867                                         pos = 0;
4868                                         ostate = OSTATE_HEAD;
4869                                         continue;
4870                                 }
4871
4872                                 /* had a naked carriage return */
4873                                 SM_ASSERT(pbp < peekbuf + sizeof(peekbuf));
4874                                 *pbp++ = c;
4875                                 c = '\r';
4876                                 ostate = OSTATE_INLINE;
4877                                 goto putch;
4878
4879                           case OSTATE_INLINE:
4880                                 if (c == '\r')
4881                                 {
4882                                         ostate = OSTATE_CR;
4883                                         continue;
4884                                 }
4885                                 if (c == '\0' &&
4886                                     bitnset(M_NONULLS,
4887                                             mci->mci_mailer->m_flags))
4888                                         break;
4889 putch:
4890                                 if (mci->mci_mailer->m_linelimit > 0 &&
4891                                     pos >= mci->mci_mailer->m_linelimit - 1 &&
4892                                     c != '\n')
4893                                 {
4894                                         int d;
4895
4896                                         /* check next character for EOL */
4897                                         if (pbp > peekbuf)
4898                                                 d = *(pbp - 1);
4899                                         else if ((d = sm_io_getc(e->e_dfp,
4900                                                                  SM_TIME_DEFAULT))
4901                                                  != SM_IO_EOF)
4902                                         {
4903                                                 SM_ASSERT(pbp < peekbuf +
4904                                                                 sizeof(peekbuf));
4905                                                 *pbp++ = d;
4906                                         }
4907
4908                                         if (d == '\n' || d == SM_IO_EOF)
4909                                         {
4910                                                 if (TrafficLogFile != NULL)
4911                                                         (void) sm_io_putc(TrafficLogFile,
4912                                                                           SM_TIME_DEFAULT,
4913                                                                           (unsigned char) c);
4914                                                 if (sm_io_putc(mci->mci_out,
4915                                                                SM_TIME_DEFAULT,
4916                                                                (unsigned char) c)
4917                                                                == SM_IO_EOF)
4918                                                 {
4919                                                         dead = true;
4920                                                         continue;
4921                                                 }
4922                                                 pos++;
4923                                                 continue;
4924                                         }
4925
4926                                         if (sm_io_putc(mci->mci_out,
4927                                                        SM_TIME_DEFAULT, '!')
4928                                             == SM_IO_EOF ||
4929                                             sm_io_fputs(mci->mci_out,
4930                                                         SM_TIME_DEFAULT,
4931                                                         mci->mci_mailer->m_eol)
4932                                             == SM_IO_EOF)
4933                                         {
4934                                                 dead = true;
4935                                                 continue;
4936                                         }
4937
4938                                         if (TrafficLogFile != NULL)
4939                                         {
4940                                                 (void) sm_io_fprintf(TrafficLogFile,
4941                                                                      SM_TIME_DEFAULT,
4942                                                                      "!%s",
4943                                                                      mci->mci_mailer->m_eol);
4944                                         }
4945                                         ostate = OSTATE_HEAD;
4946                                         SM_ASSERT(pbp < peekbuf +
4947                                                         sizeof(peekbuf));
4948                                         *pbp++ = c;
4949                                         continue;
4950                                 }
4951                                 if (c == '\n')
4952                                 {
4953                                         if (TrafficLogFile != NULL)
4954                                                 (void) sm_io_fputs(TrafficLogFile,
4955                                                                    SM_TIME_DEFAULT,
4956                                                                    mci->mci_mailer->m_eol);
4957                                         if (sm_io_fputs(mci->mci_out,
4958                                                         SM_TIME_DEFAULT,
4959                                                         mci->mci_mailer->m_eol)
4960                                                         == SM_IO_EOF)
4961                                                 continue;
4962                                         pos = 0;
4963                                         ostate = OSTATE_HEAD;
4964                                 }
4965                                 else
4966                                 {
4967                                         if (TrafficLogFile != NULL)
4968                                                 (void) sm_io_putc(TrafficLogFile,
4969                                                                   SM_TIME_DEFAULT,
4970                                                                   (unsigned char) c);
4971                                         if (sm_io_putc(mci->mci_out,
4972                                                        SM_TIME_DEFAULT,
4973                                                        (unsigned char) c)
4974                                             == SM_IO_EOF)
4975                                         {
4976                                                 dead = true;
4977                                                 continue;
4978                                         }
4979                                         pos++;
4980                                         ostate = OSTATE_INLINE;
4981                                 }
4982                                 break;
4983                         }
4984                 }
4985
4986                 /* make sure we are at the beginning of a line */
4987                 if (bp > buf)
4988                 {
4989                         if (TrafficLogFile != NULL)
4990                         {
4991                                 for (xp = buf; xp < bp; xp++)
4992                                         (void) sm_io_putc(TrafficLogFile,
4993                                                           SM_TIME_DEFAULT,
4994                                                           (unsigned char) *xp);
4995                         }
4996                         for (xp = buf; xp < bp; xp++)
4997                         {
4998                                 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT,
4999                                                (unsigned char) *xp)
5000                                     == SM_IO_EOF)
5001                                 {
5002                                         dead = true;
5003                                         break;
5004                                 }
5005                         }
5006                         pos += bp - buf;
5007                 }
5008                 if (!dead && pos > 0)
5009                 {
5010                         if (TrafficLogFile != NULL)
5011                                 (void) sm_io_fputs(TrafficLogFile,
5012                                                    SM_TIME_DEFAULT,
5013                                                    mci->mci_mailer->m_eol);
5014                         if (sm_io_fputs(mci->mci_out, SM_TIME_DEFAULT,
5015                                            mci->mci_mailer->m_eol) == SM_IO_EOF)
5016                                 goto writeerr;
5017                 }
5018         }
5019
5020         if (sm_io_error(e->e_dfp))
5021         {
5022                 syserr("putbody: %s/%cf%s: read error",
5023                        qid_printqueue(e->e_dfqgrp, e->e_dfqdir),
5024                        DATAFL_LETTER, e->e_id);
5025                 ExitStat = EX_IOERR;
5026                 ioerr = true;
5027         }
5028
5029 endofmessage:
5030         /*
5031         **  Since mailfile() uses e_dfp in a child process,
5032         **  the file offset in the stdio library for the
5033         **  parent process will not agree with the in-kernel
5034         **  file offset since the file descriptor is shared
5035         **  between the processes.  Therefore, it is vital
5036         **  that the file always be rewound.  This forces the
5037         **  kernel offset (lseek) and stdio library (ftell)
5038         **  offset to match.
5039         */
5040
5041         save_errno = errno;
5042         if (e->e_dfp != NULL)
5043                 (void) bfrewind(e->e_dfp);
5044
5045         /* some mailers want extra blank line at end of message */
5046         if (!dead && bitnset(M_BLANKEND, mci->mci_mailer->m_flags) &&
5047             buf[0] != '\0' && buf[0] != '\n')
5048         {
5049                 if (!putline("", mci))
5050                         goto writeerr;
5051         }
5052
5053         if (!dead &&
5054             (sm_io_flush(mci->mci_out, SM_TIME_DEFAULT) == SM_IO_EOF ||
5055              (sm_io_error(mci->mci_out) && errno != EPIPE)))
5056         {
5057                 save_errno = errno;
5058                 syserr("putbody: write error");
5059                 ExitStat = EX_IOERR;
5060                 ioerr = true;
5061         }
5062
5063         errno = save_errno;
5064         return !dead && !ioerr;
5065
5066   writeerr:
5067         return false;
5068 }
5069
5070 /*
5071 **  MAILFILE -- Send a message to a file.
5072 **
5073 **      If the file has the set-user-ID/set-group-ID bits set, but NO
5074 **      execute bits, sendmail will try to become the owner of that file
5075 **      rather than the real user.  Obviously, this only works if
5076 **      sendmail runs as root.
5077 **
5078 **      This could be done as a subordinate mailer, except that it
5079 **      is used implicitly to save messages in ~/dead.letter.  We
5080 **      view this as being sufficiently important as to include it
5081 **      here.  For example, if the system is dying, we shouldn't have
5082 **      to create another process plus some pipes to save the message.
5083 **
5084 **      Parameters:
5085 **              filename -- the name of the file to send to.
5086 **              mailer -- mailer definition for recipient -- if NULL,
5087 **                      use FileMailer.
5088 **              ctladdr -- the controlling address header -- includes
5089 **                      the userid/groupid to be when sending.
5090 **              sfflags -- flags for opening.
5091 **              e -- the current envelope.
5092 **
5093 **      Returns:
5094 **              The exit code associated with the operation.
5095 **
5096 **      Side Effects:
5097 **              none.
5098 */
5099
5100 # define RETURN(st)                     exit(st);
5101
5102 static jmp_buf  CtxMailfileTimeout;
5103
5104 int
5105 mailfile(filename, mailer, ctladdr, sfflags, e)
5106         char *volatile filename;
5107         MAILER *volatile mailer;
5108         ADDRESS *ctladdr;
5109         volatile long sfflags;
5110         register ENVELOPE *e;
5111 {
5112         register SM_FILE_T *f;
5113         register pid_t pid = -1;
5114         volatile int mode;
5115         int len;
5116         off_t curoff;
5117         bool suidwarn = geteuid() == 0;
5118         char *p;
5119         char *volatile realfile;
5120         SM_EVENT *ev;
5121         char buf[MAXPATHLEN];
5122         char targetfile[MAXPATHLEN];
5123
5124         if (tTd(11, 1))
5125         {
5126                 sm_dprintf("mailfile %s\n  ctladdr=", filename);
5127                 printaddr(sm_debug_file(), ctladdr, false);
5128         }
5129
5130         if (mailer == NULL)
5131                 mailer = FileMailer;
5132
5133         if (e->e_xfp != NULL)
5134                 (void) sm_io_flush(e->e_xfp, SM_TIME_DEFAULT);
5135
5136         /*
5137         **  Special case /dev/null.  This allows us to restrict file
5138         **  delivery to regular files only.
5139         */
5140
5141         if (sm_path_isdevnull(filename))
5142                 return EX_OK;
5143
5144         /* check for 8-bit available */
5145         if (bitset(EF_HAS8BIT, e->e_flags) &&
5146             bitnset(M_7BITS, mailer->m_flags) &&
5147             (bitset(EF_DONT_MIME, e->e_flags) ||
5148              !(bitset(MM_MIME8BIT, MimeMode) ||
5149                (bitset(EF_IS_MIME, e->e_flags) &&
5150                 bitset(MM_CVTMIME, MimeMode)))))
5151         {
5152                 e->e_status = "5.6.3";
5153                 usrerrenh(e->e_status,
5154                           "554 Cannot send 8-bit data to 7-bit destination");
5155                 errno = 0;
5156                 return EX_DATAERR;
5157         }
5158
5159         /* Find the actual file */
5160         if (SafeFileEnv != NULL && SafeFileEnv[0] != '\0')
5161         {
5162                 len = strlen(SafeFileEnv);
5163
5164                 if (strncmp(SafeFileEnv, filename, len) == 0)
5165                         filename += len;
5166
5167                 if (len + strlen(filename) + 1 >= sizeof(targetfile))
5168                 {
5169                         syserr("mailfile: filename too long (%s/%s)",
5170                                SafeFileEnv, filename);
5171                         return EX_CANTCREAT;
5172                 }
5173                 (void) sm_strlcpy(targetfile, SafeFileEnv, sizeof(targetfile));
5174                 realfile = targetfile + len;
5175                 if (*filename == '/')
5176                         filename++;
5177                 if (*filename != '\0')
5178                 {
5179                         /* paranoia: trailing / should be removed in readcf */
5180                         if (targetfile[len - 1] != '/')
5181                                 (void) sm_strlcat(targetfile,
5182                                                   "/", sizeof(targetfile));
5183                         (void) sm_strlcat(targetfile, filename,
5184                                           sizeof(targetfile));
5185                 }
5186         }
5187         else if (mailer->m_rootdir != NULL)
5188         {
5189                 expand(mailer->m_rootdir, targetfile, sizeof(targetfile), e);
5190                 len = strlen(targetfile);
5191
5192                 if (strncmp(targetfile, filename, len) == 0)
5193                         filename += len;
5194
5195                 if (len + strlen(filename) + 1 >= sizeof(targetfile))
5196                 {
5197                         syserr("mailfile: filename too long (%s/%s)",
5198                                targetfile, filename);
5199                         return EX_CANTCREAT;
5200                 }
5201                 realfile = targetfile + len;
5202                 if (targetfile[len - 1] != '/')
5203                         (void) sm_strlcat(targetfile, "/", sizeof(targetfile));
5204                 if (*filename == '/')
5205                         (void) sm_strlcat(targetfile, filename + 1,
5206                                           sizeof(targetfile));
5207                 else
5208                         (void) sm_strlcat(targetfile, filename,
5209                                           sizeof(targetfile));
5210         }
5211         else
5212         {
5213                 if (sm_strlcpy(targetfile, filename, sizeof(targetfile)) >=
5214                     sizeof(targetfile))
5215                 {
5216                         syserr("mailfile: filename too long (%s)", filename);
5217                         return EX_CANTCREAT;
5218                 }
5219                 realfile = targetfile;
5220         }
5221
5222         /*
5223         **  Fork so we can change permissions here.
5224         **      Note that we MUST use fork, not vfork, because of
5225         **      the complications of calling subroutines, etc.
5226         */
5227
5228
5229         /*
5230         **  Dispose of SIGCHLD signal catchers that may be laying
5231         **  around so that the waitfor() below will get it.
5232         */
5233
5234         (void) sm_signal(SIGCHLD, SIG_DFL);
5235
5236         DOFORK(fork);
5237
5238         if (pid < 0)
5239                 return EX_OSERR;
5240         else if (pid == 0)
5241         {
5242                 /* child -- actually write to file */
5243                 struct stat stb;
5244                 MCI mcibuf;
5245                 int err;
5246                 volatile int oflags = O_WRONLY|O_APPEND;
5247
5248                 /* Reset global flags */
5249                 RestartRequest = NULL;
5250                 RestartWorkGroup = false;
5251                 ShutdownRequest = NULL;
5252                 PendingSignal = 0;
5253                 CurrentPid = getpid();
5254
5255                 if (e->e_lockfp != NULL)
5256                 {
5257                         int fd;
5258
5259                         fd = sm_io_getinfo(e->e_lockfp, SM_IO_WHAT_FD, NULL);
5260                         /* SM_ASSERT(fd >= 0); */
5261                         if (fd >= 0)
5262                                 (void) close(fd);
5263                 }
5264
5265                 (void) sm_signal(SIGINT, SIG_DFL);
5266                 (void) sm_signal(SIGHUP, SIG_DFL);
5267                 (void) sm_signal(SIGTERM, SIG_DFL);
5268                 (void) umask(OldUmask);
5269                 e->e_to = filename;
5270                 ExitStat = EX_OK;
5271
5272                 if (setjmp(CtxMailfileTimeout) != 0)
5273                 {
5274                         RETURN(EX_TEMPFAIL);
5275                 }
5276
5277                 if (TimeOuts.to_fileopen > 0)
5278                         ev = sm_setevent(TimeOuts.to_fileopen, mailfiletimeout,
5279                                          0);
5280                 else
5281                         ev = NULL;
5282
5283                 /* check file mode to see if set-user-ID */
5284                 if (stat(targetfile, &stb) < 0)
5285                         mode = FileMode;
5286                 else
5287                         mode = stb.st_mode;
5288
5289                 /* limit the errors to those actually caused in the child */
5290                 errno = 0;
5291                 ExitStat = EX_OK;
5292
5293                 /* Allow alias expansions to use the S_IS{U,G}ID bits */
5294                 if ((ctladdr != NULL && !bitset(QALIAS, ctladdr->q_flags)) ||
5295                     bitset(SFF_RUNASREALUID, sfflags))
5296                 {
5297                         /* ignore set-user-ID and set-group-ID bits */
5298                         mode &= ~(S_ISGID|S_ISUID);
5299                         if (tTd(11, 20))
5300                                 sm_dprintf("mailfile: ignoring set-user-ID/set-group-ID bits\n");
5301                 }
5302
5303                 /* we have to open the data file BEFORE setuid() */
5304                 if (e->e_dfp == NULL && bitset(EF_HAS_DF, e->e_flags))
5305                 {
5306                         char *df = queuename(e, DATAFL_LETTER);
5307
5308                         e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, df,
5309                                               SM_IO_RDONLY_B, NULL);
5310                         if (e->e_dfp == NULL)
5311                         {
5312                                 syserr("mailfile: Cannot open %s for %s from %s",
5313                                         df, e->e_to, e->e_from.q_paddr);
5314                         }
5315                 }
5316
5317                 /* select a new user to run as */
5318                 if (!bitset(SFF_RUNASREALUID, sfflags))
5319                 {
5320                         if (bitnset(M_SPECIFIC_UID, mailer->m_flags))
5321                         {
5322                                 RealUserName = NULL;
5323                                 if (mailer->m_uid == NO_UID)
5324                                         RealUid = RunAsUid;
5325                                 else
5326                                         RealUid = mailer->m_uid;
5327                                 if (RunAsUid != 0 && RealUid != RunAsUid)
5328                                 {
5329                                         /* Only root can change the uid */
5330                                         syserr("mailfile: insufficient privileges to change uid, RunAsUid=%d, RealUid=%d",
5331                                                 (int) RunAsUid, (int) RealUid);
5332                                         RETURN(EX_TEMPFAIL);
5333                                 }
5334                         }
5335                         else if (bitset(S_ISUID, mode))
5336                         {
5337                                 RealUserName = NULL;
5338                                 RealUid = stb.st_uid;
5339                         }
5340                         else if (ctladdr != NULL && ctladdr->q_uid != 0)
5341                         {
5342                                 if (ctladdr->q_ruser != NULL)
5343                                         RealUserName = ctladdr->q_ruser;
5344                                 else
5345                                         RealUserName = ctladdr->q_user;
5346                                 RealUid = ctladdr->q_uid;
5347                         }
5348                         else if (mailer != NULL && mailer->m_uid != NO_UID)
5349                         {
5350                                 RealUserName = DefUser;
5351                                 RealUid = mailer->m_uid;
5352                         }
5353                         else
5354                         {
5355                                 RealUserName = DefUser;
5356                                 RealUid = DefUid;
5357                         }
5358
5359                         /* select a new group to run as */
5360                         if (bitnset(M_SPECIFIC_UID, mailer->m_flags))
5361                         {
5362                                 if (mailer->m_gid == NO_GID)
5363                                         RealGid = RunAsGid;
5364                                 else
5365                                         RealGid = mailer->m_gid;
5366                                 if (RunAsUid != 0 &&
5367                                     (RealGid != getgid() ||
5368                                      RealGid != getegid()))
5369                                 {
5370                                         /* Only root can change the gid */
5371                                         syserr("mailfile: insufficient privileges to change gid, RealGid=%d, RunAsUid=%d, gid=%d, egid=%d",
5372                                                (int) RealGid, (int) RunAsUid,
5373                                                (int) getgid(), (int) getegid());
5374                                         RETURN(EX_TEMPFAIL);
5375                                 }
5376                         }
5377                         else if (bitset(S_ISGID, mode))
5378                                 RealGid = stb.st_gid;
5379                         else if (ctladdr != NULL &&
5380                                  ctladdr->q_uid == DefUid &&
5381                                  ctladdr->q_gid == 0)
5382                         {
5383                                 /*
5384                                 **  Special case:  This means it is an
5385                                 **  alias and we should act as DefaultUser.
5386                                 **  See alias()'s comments.
5387                                 */
5388
5389                                 RealGid = DefGid;
5390                                 RealUserName = DefUser;
5391                         }
5392                         else if (ctladdr != NULL && ctladdr->q_uid != 0)
5393                                 RealGid = ctladdr->q_gid;
5394                         else if (mailer != NULL && mailer->m_gid != NO_GID)
5395                                 RealGid = mailer->m_gid;
5396                         else
5397                                 RealGid = DefGid;
5398                 }
5399
5400                 /* last ditch */
5401                 if (!bitset(SFF_ROOTOK, sfflags))
5402                 {
5403                         if (RealUid == 0)
5404                                 RealUid = DefUid;
5405                         if (RealGid == 0)
5406                                 RealGid = DefGid;
5407                 }
5408
5409                 /* set group id list (needs /etc/group access) */
5410                 if (RealUserName != NULL && !DontInitGroups)
5411                 {
5412                         if (initgroups(RealUserName, RealGid) == -1 && suidwarn)
5413                         {
5414                                 syserr("mailfile: initgroups(%s, %d) failed",
5415                                         RealUserName, RealGid);
5416                                 RETURN(EX_TEMPFAIL);
5417                         }
5418                 }
5419                 else
5420                 {
5421                         GIDSET_T gidset[1];
5422
5423                         gidset[0] = RealGid;
5424                         if (setgroups(1, gidset) == -1 && suidwarn)
5425                         {
5426                                 syserr("mailfile: setgroups() failed");
5427                                 RETURN(EX_TEMPFAIL);
5428                         }
5429                 }
5430
5431                 /*
5432                 **  If you have a safe environment, go into it.
5433                 */
5434
5435                 if (realfile != targetfile)
5436                 {
5437                         char save;
5438
5439                         save = *realfile;
5440                         *realfile = '\0';
5441                         if (tTd(11, 20))
5442                                 sm_dprintf("mailfile: chroot %s\n", targetfile);
5443                         if (chroot(targetfile) < 0)
5444                         {
5445                                 syserr("mailfile: Cannot chroot(%s)",
5446                                        targetfile);
5447                                 RETURN(EX_CANTCREAT);
5448                         }
5449                         *realfile = save;
5450                 }
5451
5452                 if (tTd(11, 40))
5453                         sm_dprintf("mailfile: deliver to %s\n", realfile);
5454
5455                 if (chdir("/") < 0)
5456                 {
5457                         syserr("mailfile: cannot chdir(/)");
5458                         RETURN(EX_CANTCREAT);
5459                 }
5460
5461                 /* now reset the group and user ids */
5462                 endpwent();
5463                 sm_mbdb_terminate();
5464                 if (setgid(RealGid) < 0 && suidwarn)
5465                 {
5466                         syserr("mailfile: setgid(%ld) failed", (long) RealGid);
5467                         RETURN(EX_TEMPFAIL);
5468                 }
5469                 vendor_set_uid(RealUid);
5470                 if (setuid(RealUid) < 0 && suidwarn)
5471                 {
5472                         syserr("mailfile: setuid(%ld) failed", (long) RealUid);
5473                         RETURN(EX_TEMPFAIL);
5474                 }
5475
5476                 if (tTd(11, 2))
5477                         sm_dprintf("mailfile: running as r/euid=%d/%d, r/egid=%d/%d\n",
5478                                 (int) getuid(), (int) geteuid(),
5479                                 (int) getgid(), (int) getegid());
5480
5481
5482                 /* move into some "safe" directory */
5483                 if (mailer->m_execdir != NULL)
5484                 {
5485                         char *q;
5486
5487                         for (p = mailer->m_execdir; p != NULL; p = q)
5488                         {
5489                                 q = strchr(p, ':');
5490                                 if (q != NULL)
5491                                         *q = '\0';
5492                                 expand(p, buf, sizeof(buf), e);
5493                                 if (q != NULL)
5494                                         *q++ = ':';
5495                                 if (tTd(11, 20))
5496                                         sm_dprintf("mailfile: trydir %s\n",
5497                                                    buf);
5498                                 if (buf[0] != '\0' && chdir(buf) >= 0)
5499                                         break;
5500                         }
5501                 }
5502
5503                 /*
5504                 **  Recheck the file after we have assumed the ID of the
5505                 **  delivery user to make sure we can deliver to it as
5506                 **  that user.  This is necessary if sendmail is running
5507                 **  as root and the file is on an NFS mount which treats
5508                 **  root as nobody.
5509                 */
5510
5511 #if HASLSTAT
5512                 if (bitnset(DBS_FILEDELIVERYTOSYMLINK, DontBlameSendmail))
5513                         err = stat(realfile, &stb);
5514                 else
5515                         err = lstat(realfile, &stb);
5516 #else /* HASLSTAT */
5517                 err = stat(realfile, &stb);
5518 #endif /* HASLSTAT */
5519
5520                 if (err < 0)
5521                 {
5522                         stb.st_mode = ST_MODE_NOFILE;
5523                         mode = FileMode;
5524                         oflags |= O_CREAT|O_EXCL;
5525                 }
5526                 else if (bitset(S_IXUSR|S_IXGRP|S_IXOTH, mode) ||
5527                          (!bitnset(DBS_FILEDELIVERYTOHARDLINK,
5528                                    DontBlameSendmail) &&
5529                           stb.st_nlink != 1) ||
5530                          (realfile != targetfile && !S_ISREG(mode)))
5531                         exit(EX_CANTCREAT);
5532                 else
5533                         mode = stb.st_mode;
5534
5535                 if (!bitnset(DBS_FILEDELIVERYTOSYMLINK, DontBlameSendmail))
5536                         sfflags |= SFF_NOSLINK;
5537                 if (!bitnset(DBS_FILEDELIVERYTOHARDLINK, DontBlameSendmail))
5538                         sfflags |= SFF_NOHLINK;
5539                 sfflags &= ~SFF_OPENASROOT;
5540                 f = safefopen(realfile, oflags, mode, sfflags);
5541                 if (f == NULL)
5542                 {
5543                         if (transienterror(errno))
5544                         {
5545                                 usrerr("454 4.3.0 cannot open %s: %s",
5546                                        shortenstring(realfile, MAXSHORTSTR),
5547                                        sm_errstring(errno));
5548                                 RETURN(EX_TEMPFAIL);
5549                         }
5550                         else
5551                         {
5552                                 usrerr("554 5.3.0 cannot open %s: %s",
5553                                        shortenstring(realfile, MAXSHORTSTR),
5554                                        sm_errstring(errno));
5555                                 RETURN(EX_CANTCREAT);
5556                         }
5557                 }
5558                 if (filechanged(realfile, sm_io_getinfo(f, SM_IO_WHAT_FD, NULL),
5559                     &stb))
5560                 {
5561                         syserr("554 5.3.0 file changed after open");
5562                         RETURN(EX_CANTCREAT);
5563                 }
5564                 if (fstat(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL), &stb) < 0)
5565                 {
5566                         syserr("554 5.3.0 cannot fstat %s",
5567                                 sm_errstring(errno));
5568                         RETURN(EX_CANTCREAT);
5569                 }
5570
5571                 curoff = stb.st_size;
5572
5573                 if (ev != NULL)
5574                         sm_clrevent(ev);
5575
5576                 memset(&mcibuf, '\0', sizeof(mcibuf));
5577                 mcibuf.mci_mailer = mailer;
5578                 mcibuf.mci_out = f;
5579                 if (bitnset(M_7BITS, mailer->m_flags))
5580                         mcibuf.mci_flags |= MCIF_7BIT;
5581
5582                 /* clear out per-message flags from connection structure */
5583                 mcibuf.mci_flags &= ~(MCIF_CVT7TO8|MCIF_CVT8TO7);
5584
5585                 if (bitset(EF_HAS8BIT, e->e_flags) &&
5586                     !bitset(EF_DONT_MIME, e->e_flags) &&
5587                     bitnset(M_7BITS, mailer->m_flags))
5588                         mcibuf.mci_flags |= MCIF_CVT8TO7;
5589
5590 #if MIME7TO8
5591                 if (bitnset(M_MAKE8BIT, mailer->m_flags) &&
5592                     !bitset(MCIF_7BIT, mcibuf.mci_flags) &&
5593                     (p = hvalue("Content-Transfer-Encoding", e->e_header)) != NULL &&
5594                     (sm_strcasecmp(p, "quoted-printable") == 0 ||
5595                      sm_strcasecmp(p, "base64") == 0) &&
5596                     (p = hvalue("Content-Type", e->e_header)) != NULL)
5597                 {
5598                         /* may want to convert 7 -> 8 */
5599                         /* XXX should really parse it here -- and use a class XXX */
5600                         if (sm_strncasecmp(p, "text/plain", 10) == 0 &&
5601                             (p[10] == '\0' || p[10] == ' ' || p[10] == ';'))
5602                                 mcibuf.mci_flags |= MCIF_CVT7TO8;
5603                 }
5604 #endif /* MIME7TO8 */
5605
5606                 if (!putfromline(&mcibuf, e) ||
5607                     !(*e->e_puthdr)(&mcibuf, e->e_header, e, M87F_OUTER) ||
5608                     !(*e->e_putbody)(&mcibuf, e, NULL) ||
5609                     !putline("\n", &mcibuf) ||
5610                     (sm_io_flush(f, SM_TIME_DEFAULT) != 0 ||
5611                     (SuperSafe != SAFE_NO &&
5612                      fsync(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL)) < 0) ||
5613                     sm_io_error(f)))
5614                 {
5615                         setstat(EX_IOERR);
5616 #if !NOFTRUNCATE
5617                         (void) ftruncate(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL),
5618                                          curoff);
5619 #endif /* !NOFTRUNCATE */
5620                 }
5621
5622                 /* reset ISUID & ISGID bits for paranoid systems */
5623 #if HASFCHMOD
5624                 (void) fchmod(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL),
5625                               (MODE_T) mode);
5626 #else /* HASFCHMOD */
5627                 (void) chmod(filename, (MODE_T) mode);
5628 #endif /* HASFCHMOD */
5629                 if (sm_io_close(f, SM_TIME_DEFAULT) < 0)
5630                         setstat(EX_IOERR);
5631                 (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
5632                 (void) setuid(RealUid);
5633                 exit(ExitStat);
5634                 /* NOTREACHED */
5635         }
5636         else
5637         {
5638                 /* parent -- wait for exit status */
5639                 int st;
5640
5641                 st = waitfor(pid);
5642                 if (st == -1)
5643                 {
5644                         syserr("mailfile: %s: wait", mailer->m_name);
5645                         return EX_SOFTWARE;
5646                 }
5647                 if (WIFEXITED(st))
5648                 {
5649                         errno = 0;
5650                         return (WEXITSTATUS(st));
5651                 }
5652                 else
5653                 {
5654                         syserr("mailfile: %s: child died on signal %d",
5655                                mailer->m_name, st);
5656                         return EX_UNAVAILABLE;
5657                 }
5658                 /* NOTREACHED */
5659         }
5660         return EX_UNAVAILABLE;  /* avoid compiler warning on IRIX */
5661 }
5662
5663 static void
5664 mailfiletimeout(ignore)
5665         int ignore;
5666 {
5667         /*
5668         **  NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
5669         **      ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
5670         **      DOING.
5671         */
5672
5673         errno = ETIMEDOUT;
5674         longjmp(CtxMailfileTimeout, 1);
5675 }
5676 /*
5677 **  HOSTSIGNATURE -- return the "signature" for a host.
5678 **
5679 **      The signature describes how we are going to send this -- it
5680 **      can be just the hostname (for non-Internet hosts) or can be
5681 **      an ordered list of MX hosts.
5682 **
5683 **      Parameters:
5684 **              m -- the mailer describing this host.
5685 **              host -- the host name.
5686 **
5687 **      Returns:
5688 **              The signature for this host.
5689 **
5690 **      Side Effects:
5691 **              Can tweak the symbol table.
5692 */
5693
5694 #define MAXHOSTSIGNATURE        8192    /* max len of hostsignature */
5695
5696 char *
5697 hostsignature(m, host)
5698         register MAILER *m;
5699         char *host;
5700 {
5701         register char *p;
5702         register STAB *s;
5703         time_t now;
5704 #if NAMED_BIND
5705         char sep = ':';
5706         char prevsep = ':';
5707         int i;
5708         int len;
5709         int nmx;
5710         int hl;
5711         char *hp;
5712         char *endp;
5713         int oldoptions = _res.options;
5714         char *mxhosts[MAXMXHOSTS + 1];
5715         unsigned short mxprefs[MAXMXHOSTS + 1];
5716 #endif /* NAMED_BIND */
5717
5718         if (tTd(17, 3))
5719                 sm_dprintf("hostsignature(%s)\n", host);
5720
5721         /*
5722         **  If local delivery (and not remote), just return a constant.
5723         */
5724
5725         if (bitnset(M_LOCALMAILER, m->m_flags) &&
5726             strcmp(m->m_mailer, "[IPC]") != 0 &&
5727             !(m->m_argv[0] != NULL && strcmp(m->m_argv[0], "TCP") == 0))
5728                 return "localhost";
5729
5730         /* an empty host does not have MX records */
5731         if (*host == '\0')
5732                 return "_empty_";
5733
5734         /*
5735         **  Check to see if this uses IPC -- if not, it can't have MX records.
5736         */
5737
5738         if (strcmp(m->m_mailer, "[IPC]") != 0 ||
5739             CurEnv->e_sendmode == SM_DEFER)
5740         {
5741                 /* just an ordinary mailer or deferred mode */
5742                 return host;
5743         }
5744 #if NETUNIX
5745         else if (m->m_argv[0] != NULL &&
5746                  strcmp(m->m_argv[0], "FILE") == 0)
5747         {
5748                 /* rendezvous in the file system, no MX records */
5749                 return host;
5750         }
5751 #endif /* NETUNIX */
5752
5753         /*
5754         **  Look it up in the symbol table.
5755         */
5756
5757         now = curtime();
5758         s = stab(host, ST_HOSTSIG, ST_ENTER);
5759         if (s->s_hostsig.hs_sig != NULL)
5760         {
5761                 if (s->s_hostsig.hs_exp >= now)
5762                 {
5763                         if (tTd(17, 3))
5764                                 sm_dprintf("hostsignature(): stab(%s) found %s\n", host,
5765                                            s->s_hostsig.hs_sig);
5766                         return s->s_hostsig.hs_sig;
5767                 }
5768
5769                 /* signature is expired: clear it */
5770                 sm_free(s->s_hostsig.hs_sig);
5771                 s->s_hostsig.hs_sig = NULL;
5772         }
5773
5774         /* set default TTL */
5775         s->s_hostsig.hs_exp = now + SM_DEFAULT_TTL;
5776
5777         /*
5778         **  Not already there or expired -- create a signature.
5779         */
5780
5781 #if NAMED_BIND
5782         if (ConfigLevel < 2)
5783                 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH);   /* XXX */
5784
5785         for (hp = host; hp != NULL; hp = endp)
5786         {
5787 #if NETINET6
5788                 if (*hp == '[')
5789                 {
5790                         endp = strchr(hp + 1, ']');
5791                         if (endp != NULL)
5792                                 endp = strpbrk(endp + 1, ":,");
5793                 }
5794                 else
5795                         endp = strpbrk(hp, ":,");
5796 #else /* NETINET6 */
5797                 endp = strpbrk(hp, ":,");
5798 #endif /* NETINET6 */
5799                 if (endp != NULL)
5800                 {
5801                         sep = *endp;
5802                         *endp = '\0';
5803                 }
5804
5805                 if (bitnset(M_NOMX, m->m_flags))
5806                 {
5807                         /* skip MX lookups */
5808                         nmx = 1;
5809                         mxhosts[0] = hp;
5810                 }
5811                 else
5812                 {
5813                         auto int rcode;
5814                         int ttl;
5815
5816                         nmx = getmxrr(hp, mxhosts, mxprefs, true, &rcode, true,
5817                                       &ttl);
5818                         if (nmx <= 0)
5819                         {
5820                                 int save_errno;
5821                                 register MCI *mci;
5822
5823                                 /* update the connection info for this host */
5824                                 save_errno = errno;
5825                                 mci = mci_get(hp, m);
5826                                 mci->mci_errno = save_errno;
5827                                 mci->mci_herrno = h_errno;
5828                                 mci->mci_lastuse = now;
5829                                 if (rcode == EX_NOHOST)
5830                                         mci_setstat(mci, rcode, "5.1.2",
5831                                                     "550 Host unknown");
5832                                 else
5833                                         mci_setstat(mci, rcode, NULL, NULL);
5834
5835                                 /* use the original host name as signature */
5836                                 nmx = 1;
5837                                 mxhosts[0] = hp;
5838                         }
5839                         if (tTd(17, 3))
5840                                 sm_dprintf("hostsignature(): getmxrr() returned %d, mxhosts[0]=%s\n",
5841                                            nmx, mxhosts[0]);
5842
5843                         /*
5844                         **  Set new TTL: we use only one!
5845                         **      We could try to use the minimum instead.
5846                         */
5847
5848                         s->s_hostsig.hs_exp = now + SM_MIN(ttl, SM_DEFAULT_TTL);
5849                 }
5850
5851                 len = 0;
5852                 for (i = 0; i < nmx; i++)
5853                         len += strlen(mxhosts[i]) + 1;
5854                 if (s->s_hostsig.hs_sig != NULL)
5855                         len += strlen(s->s_hostsig.hs_sig) + 1;
5856                 if (len < 0 || len >= MAXHOSTSIGNATURE)
5857                 {
5858                         sm_syslog(LOG_WARNING, NOQID, "hostsignature for host '%s' exceeds maxlen (%d): %d",
5859                                   host, MAXHOSTSIGNATURE, len);
5860                         len = MAXHOSTSIGNATURE;
5861                 }
5862                 p = sm_pmalloc_x(len);
5863                 if (s->s_hostsig.hs_sig != NULL)
5864                 {
5865                         (void) sm_strlcpy(p, s->s_hostsig.hs_sig, len);
5866                         sm_free(s->s_hostsig.hs_sig); /* XXX */
5867                         s->s_hostsig.hs_sig = p;
5868                         hl = strlen(p);
5869                         p += hl;
5870                         *p++ = prevsep;
5871                         len -= hl + 1;
5872                 }
5873                 else
5874                         s->s_hostsig.hs_sig = p;
5875                 for (i = 0; i < nmx; i++)
5876                 {
5877                         hl = strlen(mxhosts[i]);
5878                         if (len - 1 < hl || len <= 1)
5879                         {
5880                                 /* force to drop out of outer loop */
5881                                 len = -1;
5882                                 break;
5883                         }
5884                         if (i != 0)
5885                         {
5886                                 if (mxprefs[i] == mxprefs[i - 1])
5887                                         *p++ = ',';
5888                                 else
5889                                         *p++ = ':';
5890                                 len--;
5891                         }
5892                         (void) sm_strlcpy(p, mxhosts[i], len);
5893                         p += hl;
5894                         len -= hl;
5895                 }
5896
5897                 /*
5898                 **  break out of loop if len exceeded MAXHOSTSIGNATURE
5899                 **  because we won't have more space for further hosts
5900                 **  anyway (separated by : in the .cf file).
5901                 */
5902
5903                 if (len < 0)
5904                         break;
5905                 if (endp != NULL)
5906                         *endp++ = sep;
5907                 prevsep = sep;
5908         }
5909         makelower(s->s_hostsig.hs_sig);
5910         if (ConfigLevel < 2)
5911                 _res.options = oldoptions;
5912 #else /* NAMED_BIND */
5913         /* not using BIND -- the signature is just the host name */
5914         /*
5915         **  'host' points to storage that will be freed after we are
5916         **  done processing the current envelope, so we copy it.
5917         */
5918         s->s_hostsig.hs_sig = sm_pstrdup_x(host);
5919 #endif /* NAMED_BIND */
5920         if (tTd(17, 1))
5921                 sm_dprintf("hostsignature(%s) = %s\n", host, s->s_hostsig.hs_sig);
5922         return s->s_hostsig.hs_sig;
5923 }
5924 /*
5925 **  PARSE_HOSTSIGNATURE -- parse the "signature" and return MX host array.
5926 **
5927 **      The signature describes how we are going to send this -- it
5928 **      can be just the hostname (for non-Internet hosts) or can be
5929 **      an ordered list of MX hosts which must be randomized for equal
5930 **      MX preference values.
5931 **
5932 **      Parameters:
5933 **              sig -- the host signature.
5934 **              mxhosts -- array to populate.
5935 **              mailer -- mailer.
5936 **
5937 **      Returns:
5938 **              The number of hosts inserted into mxhosts array.
5939 **
5940 **      Side Effects:
5941 **              Randomizes equal MX preference hosts in mxhosts.
5942 */
5943
5944 static int
5945 parse_hostsignature(sig, mxhosts, mailer)
5946         char *sig;
5947         char **mxhosts;
5948         MAILER *mailer;
5949 {
5950         unsigned short curpref = 0;
5951         int nmx = 0, i, j;      /* NOTE: i, j, and nmx must have same type */
5952         char *hp, *endp;
5953         unsigned short prefer[MAXMXHOSTS];
5954         long rndm[MAXMXHOSTS];
5955
5956         for (hp = sig; hp != NULL; hp = endp)
5957         {
5958                 char sep = ':';
5959
5960 #if NETINET6
5961                 if (*hp == '[')
5962                 {
5963                         endp = strchr(hp + 1, ']');
5964                         if (endp != NULL)
5965                                 endp = strpbrk(endp + 1, ":,");
5966                 }
5967                 else
5968                         endp = strpbrk(hp, ":,");
5969 #else /* NETINET6 */
5970                 endp = strpbrk(hp, ":,");
5971 #endif /* NETINET6 */
5972                 if (endp != NULL)
5973                 {
5974                         sep = *endp;
5975                         *endp = '\0';
5976                 }
5977
5978                 mxhosts[nmx] = hp;
5979                 prefer[nmx] = curpref;
5980                 if (mci_match(hp, mailer))
5981                         rndm[nmx] = 0;
5982                 else
5983                         rndm[nmx] = get_random();
5984
5985                 if (endp != NULL)
5986                 {
5987                         /*
5988                         **  Since we don't have the original MX prefs,
5989                         **  make our own.  If the separator is a ':', that
5990                         **  means the preference for the next host will be
5991                         **  higher than this one, so simply increment curpref.
5992                         */
5993
5994                         if (sep == ':')
5995                                 curpref++;
5996
5997                         *endp++ = sep;
5998                 }
5999                 if (++nmx >= MAXMXHOSTS)
6000                         break;
6001         }
6002
6003         /* sort the records using the random factor for equal preferences */
6004         for (i = 0; i < nmx; i++)
6005         {
6006                 for (j = i + 1; j < nmx; j++)
6007                 {
6008                         /*
6009                         **  List is already sorted by MX preference, only
6010                         **  need to look for equal preference MX records
6011                         */
6012
6013                         if (prefer[i] < prefer[j])
6014                                 break;
6015
6016                         if (prefer[i] > prefer[j] ||
6017                             (prefer[i] == prefer[j] && rndm[i] > rndm[j]))
6018                         {
6019                                 register unsigned short tempp;
6020                                 register long tempr;
6021                                 register char *temp1;
6022
6023                                 tempp = prefer[i];
6024                                 prefer[i] = prefer[j];
6025                                 prefer[j] = tempp;
6026                                 temp1 = mxhosts[i];
6027                                 mxhosts[i] = mxhosts[j];
6028                                 mxhosts[j] = temp1;
6029                                 tempr = rndm[i];
6030                                 rndm[i] = rndm[j];
6031                                 rndm[j] = tempr;
6032                         }
6033                 }
6034         }
6035         return nmx;
6036 }
6037
6038 # if STARTTLS
6039 static SSL_CTX  *clt_ctx = NULL;
6040 static bool     tls_ok_clt = true;
6041
6042 /*
6043 **  SETCLTTLS -- client side TLS: allow/disallow.
6044 **
6045 **      Parameters:
6046 **              tls_ok -- should tls be done?
6047 **
6048 **      Returns:
6049 **              none.
6050 **
6051 **      Side Effects:
6052 **              sets tls_ok_clt (static variable in this module)
6053 */
6054
6055 void
6056 setclttls(tls_ok)
6057         bool tls_ok;
6058 {
6059         tls_ok_clt = tls_ok;
6060         return;
6061 }
6062 /*
6063 **  INITCLTTLS -- initialize client side TLS
6064 **
6065 **      Parameters:
6066 **              tls_ok -- should tls initialization be done?
6067 **
6068 **      Returns:
6069 **              succeeded?
6070 **
6071 **      Side Effects:
6072 **              sets tls_ok_clt (static variable in this module)
6073 */
6074
6075 bool
6076 initclttls(tls_ok)
6077         bool tls_ok;
6078 {
6079         if (!tls_ok_clt)
6080                 return false;
6081         tls_ok_clt = tls_ok;
6082         if (!tls_ok_clt)
6083                 return false;
6084         if (clt_ctx != NULL)
6085                 return true;    /* already done */
6086         tls_ok_clt = inittls(&clt_ctx, TLS_I_CLT, Clt_SSL_Options, false,
6087                              CltCertFile, CltKeyFile,
6088                              CACertPath, CACertFile, DHParams);
6089         return tls_ok_clt;
6090 }
6091
6092 /*
6093 **  STARTTLS -- try to start secure connection (client side)
6094 **
6095 **      Parameters:
6096 **              m -- the mailer.
6097 **              mci -- the mailer connection info.
6098 **              e -- the envelope.
6099 **
6100 **      Returns:
6101 **              success?
6102 **              (maybe this should be some other code than EX_
6103 **              that denotes which stage failed.)
6104 */
6105
6106 static int
6107 starttls(m, mci, e)
6108         MAILER *m;
6109         MCI *mci;
6110         ENVELOPE *e;
6111 {
6112         int smtpresult;
6113         int result = 0;
6114         int rfd, wfd;
6115         SSL *clt_ssl = NULL;
6116         time_t tlsstart;
6117
6118         if (clt_ctx == NULL && !initclttls(true))
6119                 return EX_TEMPFAIL;
6120
6121 # if USE_OPENSSL_ENGINE
6122         if (!SSLEngineInitialized && !SSL_set_engine(NULL))
6123         {
6124                 sm_syslog(LOG_ERR, NOQID,
6125                           "STARTTLS=client, SSL_set_engine=failed");
6126                 return EX_TEMPFAIL;
6127         }
6128         SSLEngineInitialized = true;
6129 # endif /* USE_OPENSSL_ENGINE */
6130
6131         smtpmessage("STARTTLS", m, mci);
6132
6133         /* get the reply */
6134         smtpresult = reply(m, mci, e, TimeOuts.to_starttls, NULL, NULL,
6135                         XS_STARTTLS);
6136
6137         /* check return code from server */
6138         if (REPLYTYPE(smtpresult) == 4)
6139                 return EX_TEMPFAIL;
6140         if (smtpresult == 501)
6141                 return EX_USAGE;
6142         if (smtpresult == -1)
6143                 return smtpresult;
6144
6145         /* not an expected reply but we have to deal with it */
6146         if (REPLYTYPE(smtpresult) == 5)
6147                 return EX_UNAVAILABLE;
6148         if (smtpresult != 220)
6149                 return EX_PROTOCOL;
6150
6151         if (LogLevel > 13)
6152                 sm_syslog(LOG_INFO, NOQID, "STARTTLS=client, start=ok");
6153
6154         /* start connection */
6155         if ((clt_ssl = SSL_new(clt_ctx)) == NULL)
6156         {
6157                 if (LogLevel > 5)
6158                 {
6159                         sm_syslog(LOG_ERR, NOQID,
6160                                   "STARTTLS=client, error: SSL_new failed");
6161                         if (LogLevel > 9)
6162                                 tlslogerr(LOG_WARNING, "client");
6163                 }
6164                 return EX_SOFTWARE;
6165         }
6166
6167         rfd = sm_io_getinfo(mci->mci_in, SM_IO_WHAT_FD, NULL);
6168         wfd = sm_io_getinfo(mci->mci_out, SM_IO_WHAT_FD, NULL);
6169
6170         /* SSL_clear(clt_ssl); ? */
6171         if (rfd < 0 || wfd < 0 ||
6172             (result = SSL_set_rfd(clt_ssl, rfd)) != 1 ||
6173             (result = SSL_set_wfd(clt_ssl, wfd)) != 1)
6174         {
6175                 if (LogLevel > 5)
6176                 {
6177                         sm_syslog(LOG_ERR, NOQID,
6178                                   "STARTTLS=client, error: SSL_set_xfd failed=%d",
6179                                   result);
6180                         if (LogLevel > 9)
6181                                 tlslogerr(LOG_WARNING, "client");
6182                 }
6183                 return EX_SOFTWARE;
6184         }
6185         SSL_set_connect_state(clt_ssl);
6186         tlsstart = curtime();
6187
6188 ssl_retry:
6189         if ((result = SSL_connect(clt_ssl)) <= 0)
6190         {
6191                 int i, ssl_err;
6192
6193                 ssl_err = SSL_get_error(clt_ssl, result);
6194                 i = tls_retry(clt_ssl, rfd, wfd, tlsstart,
6195                         TimeOuts.to_starttls, ssl_err, "client");
6196                 if (i > 0)
6197                         goto ssl_retry;
6198
6199                 if (LogLevel > 5)
6200                 {
6201                         unsigned long l;
6202                         const char *sr;
6203
6204                         l = ERR_peek_error();
6205                         sr = ERR_reason_error_string(l);
6206                         sm_syslog(LOG_WARNING, NOQID,
6207                                   "STARTTLS=client, error: connect failed=%d, reason=%s, SSL_error=%d, errno=%d, retry=%d",
6208                                   result, sr == NULL ? "unknown" : sr, ssl_err,
6209                                   errno, i);
6210                         if (LogLevel > 9)
6211                                 tlslogerr(LOG_WARNING, "client");
6212                 }
6213
6214                 SSL_free(clt_ssl);
6215                 clt_ssl = NULL;
6216                 return EX_SOFTWARE;
6217         }
6218         mci->mci_ssl = clt_ssl;
6219         result = tls_get_info(mci->mci_ssl, false, mci->mci_host,
6220                               &mci->mci_macro, true);
6221
6222         /* switch to use TLS... */
6223         if (sfdctls(&mci->mci_in, &mci->mci_out, mci->mci_ssl) == 0)
6224                 return EX_OK;
6225
6226         /* failure */
6227         SSL_free(clt_ssl);
6228         clt_ssl = NULL;
6229         return EX_SOFTWARE;
6230 }
6231 /*
6232 **  ENDTLSCLT -- shutdown secure connection (client side)
6233 **
6234 **      Parameters:
6235 **              mci -- the mailer connection info.
6236 **
6237 **      Returns:
6238 **              success?
6239 */
6240
6241 static int
6242 endtlsclt(mci)
6243         MCI *mci;
6244 {
6245         int r;
6246
6247         if (!bitset(MCIF_TLSACT, mci->mci_flags))
6248                 return EX_OK;
6249         r = endtls(mci->mci_ssl, "client");
6250         mci->mci_flags &= ~MCIF_TLSACT;
6251         return r;
6252 }
6253 # endif /* STARTTLS */
6254 # if STARTTLS || SASL
6255 /*
6256 **  ISCLTFLGSET -- check whether client flag is set.
6257 **
6258 **      Parameters:
6259 **              e -- envelope.
6260 **              flag -- flag to check in {client_flags}
6261 **
6262 **      Returns:
6263 **              true iff flag is set.
6264 */
6265
6266 static bool
6267 iscltflgset(e, flag)
6268         ENVELOPE *e;
6269         int flag;
6270 {
6271         char *p;
6272
6273         p = macvalue(macid("{client_flags}"), e);
6274         if (p == NULL)
6275                 return false;
6276         for (; *p != '\0'; p++)
6277         {
6278                 /* look for just this one flag */
6279                 if (*p == (char) flag)
6280                         return true;
6281         }
6282         return false;
6283 }
6284 # endif /* STARTTLS || SASL */