contrib/sendmail-8.14/sendmail/parseaddr.c

   1 /*
   2  * Copyright (c) 1998-2006 Sendmail, Inc. and its suppliers.
   3  *      All rights reserved.
   4  * Copyright (c) 1983, 1995-1997 Eric P. Allman.  All rights reserved.
   5  * Copyright (c) 1988, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * By using this file, you agree to the terms and conditions set
   9  * forth in the LICENSE file which can be found at the top level of
  10  * the sendmail distribution.
  11  *
  12  */
  13
  14 #include <sendmail.h>
  15
  16 SM_RCSID("@(#)$Id: parseaddr.c,v 8.400 2006/12/21 00:24:06 ca Exp $")
  17
  18 #include <sm/sendmail.h>
  19 #include "map.h"
  20
  21 static void     allocaddr __P((ADDRESS *, int, char *, ENVELOPE *));
  22 static int      callsubr __P((char**, int, ENVELOPE *));
  23 static char     *map_lookup __P((STAB *, char *, char **, int *, ENVELOPE *));
  24 static ADDRESS  *buildaddr __P((char **, ADDRESS *, int, ENVELOPE *));
  25 static bool     hasctrlchar __P((register char *, bool, bool));
  26
  27 /* replacement for illegal characters in addresses */
  28 #define BAD_CHAR_REPLACEMENT    '?'
  29
  30 /*
  31 **  PARSEADDR -- Parse an address
  32 **
  33 **      Parses an address and breaks it up into three parts: a
  34 **      net to transmit the message on, the host to transmit it
  35 **      to, and a user on that host.  These are loaded into an
  36 **      ADDRESS header with the values squirreled away if necessary.
  37 **      The "user" part may not be a real user; the process may
  38 **      just reoccur on that machine.  For example, on a machine
  39 **      with an arpanet connection, the address
  40 **              csvax.bill@berkeley
  41 **      will break up to a "user" of 'csvax.bill' and a host
  42 **      of 'berkeley' -- to be transmitted over the arpanet.
  43 **
  44 **      Parameters:
  45 **              addr -- the address to parse.
  46 **              a -- a pointer to the address descriptor buffer.
  47 **                      If NULL, an address will be created.
  48 **              flags -- describe detail for parsing.  See RF_ definitions
  49 **                      in sendmail.h.
  50 **              delim -- the character to terminate the address, passed
  51 **                      to prescan.
  52 **              delimptr -- if non-NULL, set to the location of the
  53 **                      delim character that was found.
  54 **              e -- the envelope that will contain this address.
  55 **              isrcpt -- true if the address denotes a recipient; false
  56 **                      indicates a sender.
  57 **
  58 **      Returns:
  59 **              A pointer to the address descriptor header (`a' if
  60 **                      `a' is non-NULL).
  61 **              NULL on error.
  62 **
  63 **      Side Effects:
  64 **              e->e_to = addr
  65 */
  66
  67 /* following delimiters are inherent to the internal algorithms */
  68 #define DELIMCHARS      "()<>,;\r\n"    /* default word delimiters */
  69
  70 ADDRESS *
  71 parseaddr(addr, a, flags, delim, delimptr, e, isrcpt)
  72         char *addr;
  73         register ADDRESS *a;
  74         int flags;
  75         int delim;
  76         char **delimptr;
  77         register ENVELOPE *e;
  78         bool isrcpt;
  79 {
  80         char **pvp;
  81         auto char *delimptrbuf;
  82         bool qup;
  83         char pvpbuf[PSBUFSIZE];
  84
  85         /*
  86         **  Initialize and prescan address.
  87         */
  88
  89         e->e_to = addr;
  90         if (tTd(20, 1))
  91                 sm_dprintf("\n--parseaddr(%s)\n", addr);
  92
  93         if (delimptr == NULL)
  94                 delimptr = &delimptrbuf;
  95
  96         pvp = prescan(addr, delim, pvpbuf, sizeof(pvpbuf), delimptr,
  97                         ExtTokenTab, false);
  98         if (pvp == NULL)
  99         {
 100                 if (tTd(20, 1))
 101                         sm_dprintf("parseaddr-->NULL\n");
 102                 return NULL;
 103         }
 104
 105         if (invalidaddr(addr, delim == '\0' ? NULL : *delimptr, isrcpt))
 106         {
 107                 if (tTd(20, 1))
 108                         sm_dprintf("parseaddr-->bad address\n");
 109                 return NULL;
 110         }
 111
 112         /*
 113         **  Save addr if we are going to have to.
 114         **
 115         **      We have to do this early because there is a chance that
 116         **      the map lookups in the rewriting rules could clobber
 117         **      static memory somewhere.
 118         */
 119
 120         if (bitset(RF_COPYPADDR, flags) && addr != NULL)
 121         {
 122                 char savec = **delimptr;
 123
 124                 if (savec != '\0')
 125                         **delimptr = '\0';
 126                 e->e_to = addr = sm_rpool_strdup_x(e->e_rpool, addr);
 127                 if (savec != '\0')
 128                         **delimptr = savec;
 129         }
 130
 131         /*
 132         **  Apply rewriting rules.
 133         **      Ruleset 0 does basic parsing.  It must resolve.
 134         */
 135
 136         qup = false;
 137         if (REWRITE(pvp, 3, e) == EX_TEMPFAIL)
 138                 qup = true;
 139         if (REWRITE(pvp, 0, e) == EX_TEMPFAIL)
 140                 qup = true;
 141
 142         /*
 143         **  Build canonical address from pvp.
 144         */
 145
 146         a = buildaddr(pvp, a, flags, e);
 147
 148         if (hasctrlchar(a->q_user, isrcpt, true))
 149         {
 150                 if (tTd(20, 1))
 151                         sm_dprintf("parseaddr-->bad q_user\n");
 152
 153                 /*
 154                 **  Just mark the address as bad so DSNs work.
 155                 **  hasctrlchar() has to make sure that the address
 156                 **  has been sanitized, e.g., shortened.
 157                 */
 158
 159                 a->q_state = QS_BADADDR;
 160         }
 161
 162         /*
 163         **  Make local copies of the host & user and then
 164         **  transport them out.
 165         */
 166
 167         allocaddr(a, flags, addr, e);
 168         if (QS_IS_BADADDR(a->q_state))
 169         {
 170                 /* weed out bad characters in the printable address too */
 171                 (void) hasctrlchar(a->q_paddr, isrcpt, false);
 172                 return a;
 173         }
 174
 175         /*
 176         **  Select a queue directory for recipient addresses.
 177         **      This is done here and in split_across_queue_groups(),
 178         **      but the latter applies to addresses after aliasing,
 179         **      and only if splitting is done.
 180         */
 181
 182         if ((a->q_qgrp == NOAQGRP || a->q_qgrp == ENVQGRP) &&
 183             !bitset(RF_SENDERADDR|RF_HEADERADDR|RF_RM_ADDR, flags) &&
 184             OpMode != MD_INITALIAS)
 185         {
 186                 int r;
 187
 188                 /* call ruleset which should return a queue group name */
 189                 r = rscap(RS_QUEUEGROUP, a->q_user, NULL, e, &pvp, pvpbuf,
 190                           sizeof(pvpbuf));
 191                 if (r == EX_OK &&
 192                     pvp != NULL && pvp[0] != NULL &&
 193                     (pvp[0][0] & 0377) == CANONNET &&
 194                     pvp[1] != NULL && pvp[1][0] != '\0')
 195                 {
 196                         r = name2qid(pvp[1]);
 197                         if (r == NOQGRP && LogLevel > 10)
 198                                 sm_syslog(LOG_INFO, NOQID,
 199                                         "can't find queue group name %s, selection ignored",
 200                                         pvp[1]);
 201                         if (tTd(20, 4) && r != NOQGRP)
 202                                 sm_syslog(LOG_INFO, NOQID,
 203                                         "queue group name %s -> %d",
 204                                         pvp[1], r);
 205                         a->q_qgrp = r == NOQGRP ? ENVQGRP : r;
 206                 }
 207         }
 208
 209         /*
 210         **  If there was a parsing failure, mark it for queueing.
 211         */
 212
 213         if (qup && OpMode != MD_INITALIAS)
 214         {
 215                 char *msg = "Transient parse error -- message queued for future delivery";
 216
 217                 if (e->e_sendmode == SM_DEFER)
 218                         msg = "Deferring message until queue run";
 219                 if (tTd(20, 1))
 220                         sm_dprintf("parseaddr: queuing message\n");
 221                 message(msg);
 222                 if (e->e_message == NULL && e->e_sendmode != SM_DEFER)
 223                         e->e_message = sm_rpool_strdup_x(e->e_rpool, msg);
 224                 a->q_state = QS_QUEUEUP;
 225                 a->q_status = "4.4.3";
 226         }
 227
 228         /*
 229         **  Compute return value.
 230         */
 231
 232         if (tTd(20, 1))
 233         {
 234                 sm_dprintf("parseaddr-->");
 235                 printaddr(sm_debug_file(), a, false);
 236         }
 237
 238         return a;
 239 }
 240 /*
 241 **  INVALIDADDR -- check for address containing characters used for macros
 242 **
 243 **      Parameters:
 244 **              addr -- the address to check.
 245 **              delimptr -- if non-NULL: end of address to check, i.e.,
 246 **                      a pointer in the address string.
 247 **              isrcpt -- true iff the address is for a recipient.
 248 **
 249 **      Returns:
 250 **              true -- if the address has characters that are reservered
 251 **                      for macros or is too long.
 252 **              false -- otherwise.
 253 */
 254
 255 bool
 256 invalidaddr(addr, delimptr, isrcpt)
 257         register char *addr;
 258         char *delimptr;
 259         bool isrcpt;
 260 {
 261         bool result = false;
 262         char savedelim = '\0';
 263         char *b = addr;
 264         int len = 0;
 265
 266         if (delimptr != NULL)
 267         {
 268                 /* delimptr points to the end of the address to test */
 269                 savedelim = *delimptr;
 270                 if (savedelim != '\0')  /* if that isn't '\0' already: */
 271                         *delimptr = '\0';       /* set it */
 272         }
 273         for (; *addr != '\0'; addr++)
 274         {
 275                 if (!EightBitAddrOK && (*addr & 0340) == 0200)
 276                 {
 277                         setstat(EX_USAGE);
 278                         result = true;
 279                         *addr = BAD_CHAR_REPLACEMENT;
 280                 }
 281                 if (++len > MAXNAME - 1)
 282                 {
 283                         char saved = *addr;
 284
 285                         *addr = '\0';
 286                         usrerr("553 5.1.0 Address \"%s\" too long (%d bytes max)",
 287                                b, MAXNAME - 1);
 288                         *addr = saved;
 289                         result = true;
 290                         goto delim;
 291                 }
 292         }
 293         if (result)
 294         {
 295                 if (isrcpt)
 296                         usrerr("501 5.1.3 8-bit character in mailbox address \"%s\"",
 297                                b);
 298                 else
 299                         usrerr("501 5.1.7 8-bit character in mailbox address \"%s\"",
 300                                b);
 301         }
 302 delim:
 303         if (delimptr != NULL && savedelim != '\0')
 304                 *delimptr = savedelim;  /* restore old character at delimptr */
 305         return result;
 306 }
 307 /*
 308 **  HASCTRLCHAR -- check for address containing meta-characters
 309 **
 310 **  Checks that the address contains no meta-characters, and contains
 311 **  no "non-printable" characters unless they are quoted or escaped.
 312 **  Quoted or escaped characters are literals.
 313 **
 314 **      Parameters:
 315 **              addr -- the address to check.
 316 **              isrcpt -- true if the address is for a recipient; false
 317 **                      indicates a from.
 318 **              complain -- true if an error should issued if the address
 319 **                      is invalid and should be "repaired".
 320 **
 321 **      Returns:
 322 **              true -- if the address has any "wierd" characters or
 323 **                      non-printable characters or if a quote is unbalanced.
 324 **              false -- otherwise.
 325 */
 326
 327 static bool
 328 hasctrlchar(addr, isrcpt, complain)
 329         register char *addr;
 330         bool isrcpt, complain;
 331 {
 332         bool quoted = false;
 333         int len = 0;
 334         char *result = NULL;
 335         char *b = addr;
 336
 337         if (addr == NULL)
 338                 return false;
 339         for (; *addr != '\0'; addr++)
 340         {
 341                 if (++len > MAXNAME - 1)
 342                 {
 343                         if (complain)
 344                         {
 345                                 (void) shorten_rfc822_string(b, MAXNAME - 1);
 346                                 usrerr("553 5.1.0 Address \"%s\" too long (%d bytes max)",
 347                                        b, MAXNAME - 1);
 348                                 return true;
 349                         }
 350                         result = "too long";
 351                 }
 352                 if (!EightBitAddrOK && !quoted && (*addr < 32 || *addr == 127))
 353                 {
 354                         result = "non-printable character";
 355                         *addr = BAD_CHAR_REPLACEMENT;
 356                         continue;
 357                 }
 358                 if (*addr == '"')
 359                         quoted = !quoted;
 360                 else if (*addr == '\\')
 361                 {
 362                         /* XXX Generic problem: no '\0' in strings. */
 363                         if (*++addr == '\0')
 364                         {
 365                                 result = "trailing \\ character";
 366                                 *--addr = BAD_CHAR_REPLACEMENT;
 367                                 break;
 368                         }
 369                 }
 370                 if (!EightBitAddrOK && (*addr & 0340) == 0200)
 371                 {
 372                         setstat(EX_USAGE);
 373                         result = "8-bit character";
 374                         *addr = BAD_CHAR_REPLACEMENT;
 375                         continue;
 376                 }
 377         }
 378         if (quoted)
 379                 result = "unbalanced quote"; /* unbalanced quote */
 380         if (result != NULL && complain)
 381         {
 382                 if (isrcpt)
 383                         usrerr("501 5.1.3 Syntax error in mailbox address \"%s\" (%s)",
 384                                b, result);
 385                 else
 386                         usrerr("501 5.1.7 Syntax error in mailbox address \"%s\" (%s)",
 387                                b, result);
 388         }
 389         return result != NULL;
 390 }
 391 /*
 392 **  ALLOCADDR -- do local allocations of address on demand.
 393 **
 394 **      Also lowercases the host name if requested.
 395 **
 396 **      Parameters:
 397 **              a -- the address to reallocate.
 398 **              flags -- the copy flag (see RF_ definitions in sendmail.h
 399 **                      for a description).
 400 **              paddr -- the printname of the address.
 401 **              e -- envelope
 402 **
 403 **      Returns:
 404 **              none.
 405 **
 406 **      Side Effects:
 407 **              Copies portions of a into local buffers as requested.
 408 */
 409
 410 static void
 411 allocaddr(a, flags, paddr, e)
 412         register ADDRESS *a;
 413         int flags;
 414         char *paddr;
 415         ENVELOPE *e;
 416 {
 417         if (tTd(24, 4))
 418                 sm_dprintf("allocaddr(flags=%x, paddr=%s)\n", flags, paddr);
 419
 420         a->q_paddr = paddr;
 421
 422         if (a->q_user == NULL)
 423                 a->q_user = "";
 424         if (a->q_host == NULL)
 425                 a->q_host = "";
 426
 427         if (bitset(RF_COPYPARSE, flags))
 428         {
 429                 a->q_host = sm_rpool_strdup_x(e->e_rpool, a->q_host);
 430                 if (a->q_user != a->q_paddr)
 431                         a->q_user = sm_rpool_strdup_x(e->e_rpool, a->q_user);
 432         }
 433
 434         if (a->q_paddr == NULL)
 435                 a->q_paddr = sm_rpool_strdup_x(e->e_rpool, a->q_user);
 436         a->q_qgrp = NOAQGRP;
 437 }
 438
 439 /*
 440 **  PRESCAN -- Prescan name and make it canonical
 441 **
 442 **      Scans a name and turns it into a set of tokens.  This process
 443 **      deletes blanks and comments (in parentheses) (if the token type
 444 **      for left paren is SPC).
 445 **
 446 **      This routine knows about quoted strings and angle brackets.
 447 **
 448 **      There are certain subtleties to this routine.  The one that
 449 **      comes to mind now is that backslashes on the ends of names
 450 **      are silently stripped off; this is intentional.  The problem
 451 **      is that some versions of sndmsg (like at LBL) set the kill
 452 **      character to something other than @ when reading addresses;
 453 **      so people type "csvax.eric\@berkeley" -- which screws up the
 454 **      berknet mailer.
 455 **
 456 **      Parameters:
 457 **              addr -- the name to chomp.
 458 **              delim -- the delimiter for the address, normally
 459 **                      '\0' or ','; \0 is accepted in any case.
 460 **                      If '\t' then we are reading the .cf file.
 461 **              pvpbuf -- place to put the saved text -- note that
 462 **                      the pointers are static.
 463 **              pvpbsize -- size of pvpbuf.
 464 **              delimptr -- if non-NULL, set to the location of the
 465 **                      terminating delimiter.
 466 **              toktab -- if set, a token table to use for parsing.
 467 **                      If NULL, use the default table.
 468 **              ignore -- if true, ignore unbalanced addresses
 469 **
 470 **      Returns:
 471 **              A pointer to a vector of tokens.
 472 **              NULL on error.
 473 */
 474
 475 /* states and character types */
 476 #define OPR             0       /* operator */
 477 #define ATM             1       /* atom */
 478 #define QST             2       /* in quoted string */
 479 #define SPC             3       /* chewing up spaces */
 480 #define ONE             4       /* pick up one character */
 481 #define ILL             5       /* illegal character */
 482
 483 #define NSTATES 6       /* number of states */
 484 #define TYPE            017     /* mask to select state type */
 485
 486 /* meta bits for table */
 487 #define M               020     /* meta character; don't pass through */
 488 #define B               040     /* cause a break */
 489 #define MB              M|B     /* meta-break */
 490
 491 static short StateTab[NSTATES][NSTATES] =
 492 {
 493    /*   oldst   chtype> OPR     ATM     QST     SPC     ONE     ILL     */
 494         /*OPR*/ {       OPR|B,  ATM|B,  QST|B,  SPC|MB, ONE|B,  ILL|MB  },
 495         /*ATM*/ {       OPR|B,  ATM,    QST|B,  SPC|MB, ONE|B,  ILL|MB  },
 496         /*QST*/ {       QST,    QST,    OPR,    QST,    QST,    QST     },
 497         /*SPC*/ {       OPR,    ATM,    QST,    SPC|M,  ONE,    ILL|MB  },
 498         /*ONE*/ {       OPR,    OPR,    OPR,    OPR,    OPR,    ILL|MB  },
 499         /*ILL*/ {       OPR|B,  ATM|B,  QST|B,  SPC|MB, ONE|B,  ILL|M   }
 500 };
 501
 502 /* these all get modified with the OperatorChars */
 503
 504 /* token type table for external strings */
 505 unsigned char   ExtTokenTab[256] =
 506 {
 507     /*  nul soh stx etx eot enq ack bel  bs  ht  nl  vt  np  cr  so  si   */
 508         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,SPC,SPC,SPC,SPC,SPC,ATM,ATM,
 509     /*  dle dc1 dc2 dc3 dc4 nak syn etb  can em  sub esc fs  gs  rs  us   */
 510         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 511     /*  sp  !   "   #   $   %   &   '    (   )   *   +   ,   -   .   /    */
 512         SPC,ATM,QST,ATM,ATM,ATM,ATM,ATM, SPC,SPC,ATM,ATM,ATM,ATM,ATM,ATM,
 513     /*  0   1   2   3   4   5   6   7    8   9   :   ;   <   =   >   ?    */
 514         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 515     /*  @   A   B   C   D   E   F   G    H   I   J   K   L   M   N   O    */
 516         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 517     /*  P   Q   R   S   T   U   V   W    X   Y   Z   [   \   ]   ^   _    */
 518         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 519     /*  `   a   b   c   d   e   f   g    h   i   j   k   l   m   n   o    */
 520         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 521     /*  p   q   r   s   t   u   v   w    x   y   z   {   |   }   ~   del  */
 522         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 523
 524     /*  nul soh stx etx eot enq ack bel  bs  ht  nl  vt  np  cr  so  si   */
 525         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 526     /*  dle dc1 dc2 dc3 dc4 nak syn etb  can em  sub esc fs  gs  rs  us   */
 527         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 528     /*  sp  !   "   #   $   %   &   '    (   )   *   +   ,   -   .   /    */
 529         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 530     /*  0   1   2   3   4   5   6   7    8   9   :   ;   <   =   >   ?    */
 531         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 532     /*  @   A   B   C   D   E   F   G    H   I   J   K   L   M   N   O    */
 533         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 534     /*  P   Q   R   S   T   U   V   W    X   Y   Z   [   \   ]   ^   _    */
 535         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 536     /*  `   a   b   c   d   e   f   g    h   i   j   k   l   m   n   o    */
 537         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 538     /*  p   q   r   s   t   u   v   w    x   y   z   {   |   }   ~   del  */
 539         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM
 540 };
 541
 542 /* token type table for internal strings */
 543 unsigned char   IntTokenTab[256] =
 544 {
 545     /*  nul soh stx etx eot enq ack bel  bs  ht  nl  vt  np  cr  so  si   */
 546         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,SPC,SPC,SPC,SPC,SPC,ATM,ATM,
 547     /*  dle dc1 dc2 dc3 dc4 nak syn etb  can em  sub esc fs  gs  rs  us   */
 548         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 549     /*  sp  !   "   #   $   %   &   '    (   )   *   +   ,   -   .   /    */
 550         SPC,ATM,QST,ATM,ATM,ATM,ATM,ATM, SPC,SPC,ATM,ATM,ATM,ATM,ATM,ATM,
 551     /*  0   1   2   3   4   5   6   7    8   9   :   ;   <   =   >   ?    */
 552         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 553     /*  @   A   B   C   D   E   F   G    H   I   J   K   L   M   N   O    */
 554         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 555     /*  P   Q   R   S   T   U   V   W    X   Y   Z   [   \   ]   ^   _    */
 556         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 557     /*  `   a   b   c   d   e   f   g    h   i   j   k   l   m   n   o    */
 558         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 559     /*  p   q   r   s   t   u   v   w    x   y   z   {   |   }   ~   del  */
 560         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 561
 562     /*  nul soh stx etx eot enq ack bel  bs  ht  nl  vt  np  cr  so  si   */
 563         OPR,OPR,ONE,OPR,OPR,OPR,OPR,OPR, OPR,OPR,OPR,OPR,OPR,OPR,OPR,OPR,
 564     /*  dle dc1 dc2 dc3 dc4 nak syn etb  can em  sub esc fs  gs  rs  us   */
 565         OPR,OPR,OPR,ONE,ONE,ONE,OPR,OPR, OPR,OPR,OPR,OPR,OPR,OPR,OPR,OPR,
 566     /*  sp  !   "   #   $   %   &   '    (   )   *   +   ,   -   .   /    */
 567         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 568     /*  0   1   2   3   4   5   6   7    8   9   :   ;   <   =   >   ?    */
 569         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 570     /*  @   A   B   C   D   E   F   G    H   I   J   K   L   M   N   O    */
 571         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 572     /*  P   Q   R   S   T   U   V   W    X   Y   Z   [   \   ]   ^   _    */
 573         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 574     /*  `   a   b   c   d   e   f   g    h   i   j   k   l   m   n   o    */
 575         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 576     /*  p   q   r   s   t   u   v   w    x   y   z   {   |   }   ~   del  */
 577         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ONE
 578 };
 579
 580 /* token type table for MIME parsing */
 581 unsigned char   MimeTokenTab[256] =
 582 {
 583     /*  nul soh stx etx eot enq ack bel  bs  ht  nl  vt  np  cr  so  si   */
 584         ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL, ILL,SPC,SPC,SPC,SPC,SPC,ILL,ILL,
 585     /*  dle dc1 dc2 dc3 dc4 nak syn etb  can em  sub esc fs  gs  rs  us   */
 586         ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL, ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL,
 587     /*  sp  !   "   #   $   %   &   '    (   )   *   +   ,   -   .   /    */
 588         SPC,ATM,QST,ATM,ATM,ATM,ATM,ATM, SPC,SPC,ATM,ATM,OPR,ATM,ATM,OPR,
 589     /*  0   1   2   3   4   5   6   7    8   9   :   ;   <   =   >   ?    */
 590         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,OPR,OPR,OPR,OPR,OPR,OPR,
 591     /*  @   A   B   C   D   E   F   G    H   I   J   K   L   M   N   O    */
 592         OPR,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 593     /*  P   Q   R   S   T   U   V   W    X   Y   Z   [   \   ]   ^   _    */
 594         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,OPR,OPR,OPR,ATM,ATM,
 595     /*  `   a   b   c   d   e   f   g    h   i   j   k   l   m   n   o    */
 596         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 597     /*  p   q   r   s   t   u   v   w    x   y   z   {   |   }   ~   del  */
 598         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 599
 600     /*  nul soh stx etx eot enq ack bel  bs  ht  nl  vt  np  cr  so  si   */
 601         ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL, ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL,
 602     /*  dle dc1 dc2 dc3 dc4 nak syn etb  can em  sub esc fs  gs  rs  us   */
 603         ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL, ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL,
 604     /*  sp  !   "   #   $   %   &   '    (   )   *   +   ,   -   .   /    */
 605         ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL, ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL,
 606     /*  0   1   2   3   4   5   6   7    8   9   :   ;   <   =   >   ?    */
 607         ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL, ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL,
 608     /*  @   A   B   C   D   E   F   G    H   I   J   K   L   M   N   O    */
 609         ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL, ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL,
 610     /*  P   Q   R   S   T   U   V   W    X   Y   Z   [   \   ]   ^   _    */
 611         ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL, ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL,
 612     /*  `   a   b   c   d   e   f   g    h   i   j   k   l   m   n   o    */
 613         ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL, ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL,
 614     /*  p   q   r   s   t   u   v   w    x   y   z   {   |   }   ~   del  */
 615         ILL,ILL,ILL,ILL,ILL,ILL,ILL,ILL, ILL,ILL,ILL,ILL,ILL,ILL,ILL,ONE
 616 };
 617
 618 /* token type table: don't strip comments */
 619 unsigned char   TokTypeNoC[256] =
 620 {
 621     /*  nul soh stx etx eot enq ack bel  bs  ht  nl  vt  np  cr  so  si   */
 622         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,SPC,SPC,SPC,SPC,SPC,ATM,ATM,
 623     /*  dle dc1 dc2 dc3 dc4 nak syn etb  can em  sub esc fs  gs  rs  us   */
 624         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 625     /*  sp  !   "   #   $   %   &   '    (   )   *   +   ,   -   .   /    */
 626         SPC,ATM,QST,ATM,ATM,ATM,ATM,ATM, OPR,OPR,ATM,ATM,ATM,ATM,ATM,ATM,
 627     /*  0   1   2   3   4   5   6   7    8   9   :   ;   <   =   >   ?    */
 628         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 629     /*  @   A   B   C   D   E   F   G    H   I   J   K   L   M   N   O    */
 630         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 631     /*  P   Q   R   S   T   U   V   W    X   Y   Z   [   \   ]   ^   _    */
 632         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 633     /*  `   a   b   c   d   e   f   g    h   i   j   k   l   m   n   o    */
 634         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 635     /*  p   q   r   s   t   u   v   w    x   y   z   {   |   }   ~   del  */
 636         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 637
 638     /*  nul soh stx etx eot enq ack bel  bs  ht  nl  vt  np  cr  so  si   */
 639         OPR,OPR,ONE,OPR,OPR,OPR,OPR,OPR, OPR,OPR,OPR,OPR,OPR,OPR,OPR,OPR,
 640     /*  dle dc1 dc2 dc3 dc4 nak syn etb  can em  sub esc fs  gs  rs  us   */
 641         OPR,OPR,OPR,ONE,ONE,ONE,OPR,OPR, OPR,OPR,OPR,OPR,OPR,OPR,OPR,OPR,
 642     /*  sp  !   "   #   $   %   &   '    (   )   *   +   ,   -   .   /    */
 643         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 644     /*  0   1   2   3   4   5   6   7    8   9   :   ;   <   =   >   ?    */
 645         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 646     /*  @   A   B   C   D   E   F   G    H   I   J   K   L   M   N   O    */
 647         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 648     /*  P   Q   R   S   T   U   V   W    X   Y   Z   [   \   ]   ^   _    */
 649         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 650     /*  `   a   b   c   d   e   f   g    h   i   j   k   l   m   n   o    */
 651         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM,
 652     /*  p   q   r   s   t   u   v   w    x   y   z   {   |   }   ~   del  */
 653         ATM,ATM,ATM,ATM,ATM,ATM,ATM,ATM, ATM,ATM,ATM,ATM,ATM,ATM,ATM,ONE
 654 };
 655
 656
 657 #define NOCHAR          (-1)    /* signal nothing in lookahead token */
 658
 659 char **
 660 prescan(addr, delim, pvpbuf, pvpbsize, delimptr, toktab, ignore)
 661         char *addr;
 662         int delim;
 663         char pvpbuf[];
 664         int pvpbsize;
 665         char **delimptr;
 666         unsigned char *toktab;
 667         bool ignore;
 668 {
 669         register char *p;
 670         register char *q;
 671         register int c;
 672         char **avp;
 673         bool bslashmode;
 674         bool route_syntax;
 675         int cmntcnt;
 676         int anglecnt;
 677         char *tok;
 678         int state;
 679         int newstate;
 680         char *saveto = CurEnv->e_to;
 681         static char *av[MAXATOM + 1];
 682         static bool firsttime = true;
 683
 684         if (firsttime)
 685         {
 686                 /* initialize the token type table */
 687                 char obuf[50];
 688
 689                 firsttime = false;
 690                 if (OperatorChars == NULL)
 691                 {
 692                         if (ConfigLevel < 7)
 693                                 OperatorChars = macvalue('o', CurEnv);
 694                         if (OperatorChars == NULL)
 695                                 OperatorChars = ".:@[]";
 696                 }
 697                 expand(OperatorChars, obuf, sizeof(obuf) - sizeof(DELIMCHARS),
 698                        CurEnv);
 699                 (void) sm_strlcat(obuf, DELIMCHARS, sizeof(obuf));
 700                 for (p = obuf; *p != '\0'; p++)
 701                 {
 702                         if (IntTokenTab[*p & 0xff] == ATM)
 703                                 IntTokenTab[*p & 0xff] = OPR;
 704                         if (ExtTokenTab[*p & 0xff] == ATM)
 705                                 ExtTokenTab[*p & 0xff] = OPR;
 706                         if (TokTypeNoC[*p & 0xff] == ATM)
 707                                 TokTypeNoC[*p & 0xff] = OPR;
 708                 }
 709         }
 710         if (toktab == NULL)
 711                 toktab = ExtTokenTab;
 712
 713         /* make sure error messages don't have garbage on them */
 714         errno = 0;
 715
 716         q = pvpbuf;
 717         bslashmode = false;
 718         route_syntax = false;
 719         cmntcnt = 0;
 720         anglecnt = 0;
 721         avp = av;
 722         state = ATM;
 723         c = NOCHAR;
 724         p = addr;
 725         CurEnv->e_to = p;
 726         if (tTd(22, 11))
 727         {
 728                 sm_dprintf("prescan: ");
 729                 xputs(sm_debug_file(), p);
 730                 sm_dprintf("\n");
 731         }
 732
 733         do
 734         {
 735                 /* read a token */
 736                 tok = q;
 737                 for (;;)
 738                 {
 739                         /* store away any old lookahead character */
 740                         if (c != NOCHAR && !bslashmode)
 741                         {
 742                                 /* see if there is room */
 743                                 if (q >= &pvpbuf[pvpbsize - 5])
 744                                 {
 745         addrtoolong:
 746                                         usrerr("553 5.1.1 Address too long");
 747                                         if (strlen(addr) > MAXNAME)
 748                                                 addr[MAXNAME] = '\0';
 749         returnnull:
 750                                         if (delimptr != NULL)
 751                                         {
 752                                                 if (p > addr)
 753                                                         --p;
 754                                                 *delimptr = p;
 755                                         }
 756                                         CurEnv->e_to = saveto;
 757                                         return NULL;
 758                                 }
 759
 760                                 /* squirrel it away */
 761 #if !ALLOW_255
 762                                 if ((char) c == (char) -1 && !tTd(82, 101) &&
 763                                     !EightBitAddrOK)
 764                                         c &= 0x7f;
 765 #endif /* !ALLOW_255 */
 766                                 *q++ = c;
 767                         }
 768
 769                         /* read a new input character */
 770                         c = (*p++) & 0x00ff;
 771                         if (c == '\0')
 772                         {
 773                                 /* diagnose and patch up bad syntax */
 774                                 if (ignore)
 775                                         break;
 776                                 else if (state == QST)
 777                                 {
 778                                         usrerr("553 Unbalanced '\"'");
 779                                         c = '"';
 780                                 }
 781                                 else if (cmntcnt > 0)
 782                                 {
 783                                         usrerr("553 Unbalanced '('");
 784                                         c = ')';
 785                                 }
 786                                 else if (anglecnt > 0)
 787                                 {
 788                                         c = '>';
 789                                         usrerr("553 Unbalanced '<'");
 790                                 }
 791                                 else
 792                                         break;
 793
 794                                 p--;
 795                         }
 796                         else if (c == delim && cmntcnt <= 0 && state != QST)
 797                         {
 798                                 if (anglecnt <= 0)
 799                                         break;
 800
 801                                 /* special case for better error management */
 802                                 if (delim == ',' && !route_syntax && !ignore)
 803                                 {
 804                                         usrerr("553 Unbalanced '<'");
 805                                         c = '>';
 806                                         p--;
 807                                 }
 808                         }
 809
 810                         if (tTd(22, 101))
 811                                 sm_dprintf("c=%c, s=%d; ", c, state);
 812
 813                         /* chew up special characters */
 814                         *q = '\0';
 815                         if (bslashmode)
 816                         {
 817                                 bslashmode = false;
 818
 819                                 /* kludge \! for naive users */
 820                                 if (cmntcnt > 0)
 821                                 {
 822                                         c = NOCHAR;
 823                                         continue;
 824                                 }
 825                                 else if (c != '!' || state == QST)
 826                                 {
 827                                         /* see if there is room */
 828                                         if (q >= &pvpbuf[pvpbsize - 5])
 829                                                 goto addrtoolong;
 830                                         *q++ = '\\';
 831                                         continue;
 832                                 }
 833                         }
 834
 835                         if (c == '\\')
 836                         {
 837                                 bslashmode = true;
 838                         }
 839                         else if (state == QST)
 840                         {
 841                                 /* EMPTY */
 842                                 /* do nothing, just avoid next clauses */
 843                         }
 844                         else if (c == '(' && toktab['('] == SPC)
 845                         {
 846                                 cmntcnt++;
 847                                 c = NOCHAR;
 848                         }
 849                         else if (c == ')' && toktab['('] == SPC)
 850                         {
 851                                 if (cmntcnt <= 0)
 852                                 {
 853                                         if (!ignore)
 854                                         {
 855                                                 usrerr("553 Unbalanced ')'");
 856                                                 c = NOCHAR;
 857                                         }
 858                                 }
 859                                 else
 860                                         cmntcnt--;
 861                         }
 862                         else if (cmntcnt > 0)
 863                         {
 864                                 c = NOCHAR;
 865                         }
 866                         else if (c == '<')
 867                         {
 868                                 char *ptr = p;
 869
 870                                 anglecnt++;
 871                                 while (isascii(*ptr) && isspace(*ptr))
 872                                         ptr++;
 873                                 if (*ptr == '@')
 874                                         route_syntax = true;
 875                         }
 876                         else if (c == '>')
 877                         {
 878                                 if (anglecnt <= 0)
 879                                 {
 880                                         if (!ignore)
 881                                         {
 882                                                 usrerr("553 Unbalanced '>'");
 883                                                 c = NOCHAR;
 884                                         }
 885                                 }
 886                                 else
 887                                         anglecnt--;
 888                                 route_syntax = false;
 889                         }
 890                         else if (delim == ' ' && isascii(c) && isspace(c))
 891                                 c = ' ';
 892
 893                         if (c == NOCHAR)
 894                                 continue;
 895
 896                         /* see if this is end of input */
 897                         if (c == delim && anglecnt <= 0 && state != QST)
 898                                 break;
 899
 900                         newstate = StateTab[state][toktab[c & 0xff]];
 901                         if (tTd(22, 101))
 902                                 sm_dprintf("ns=%02o\n", newstate);
 903                         state = newstate & TYPE;
 904                         if (state == ILL)
 905                         {
 906                                 if (isascii(c) && isprint(c))
 907                                         usrerr("553 Illegal character %c", c);
 908                                 else
 909                                         usrerr("553 Illegal character 0x%02x",
 910                                                c & 0x0ff);
 911                         }
 912                         if (bitset(M, newstate))
 913                                 c = NOCHAR;
 914                         if (bitset(B, newstate))
 915                                 break;
 916                 }
 917
 918                 /* new token */
 919                 if (tok != q)
 920                 {
 921                         /* see if there is room */
 922                         if (q >= &pvpbuf[pvpbsize - 5])
 923                                 goto addrtoolong;
 924                         *q++ = '\0';
 925                         if (tTd(22, 36))
 926                         {
 927                                 sm_dprintf("tok=");
 928                                 xputs(sm_debug_file(), tok);
 929                                 sm_dprintf("\n");
 930                         }
 931                         if (avp >= &av[MAXATOM])
 932                         {
 933                                 usrerr("553 5.1.0 prescan: too many tokens");
 934                                 goto returnnull;
 935                         }
 936                         if (q - tok > MAXNAME)
 937                         {
 938                                 usrerr("553 5.1.0 prescan: token too long");
 939                                 goto returnnull;
 940                         }
 941                         *avp++ = tok;
 942                 }
 943         } while (c != '\0' && (c != delim || anglecnt > 0));
 944         *avp = NULL;
 945         if (delimptr != NULL)
 946         {
 947                 if (p > addr)
 948                         p--;
 949                 *delimptr = p;
 950         }
 951         if (tTd(22, 12))
 952         {
 953                 sm_dprintf("prescan==>");
 954                 printav(sm_debug_file(), av);
 955         }
 956         CurEnv->e_to = saveto;
 957         if (av[0] == NULL)
 958         {
 959                 if (tTd(22, 1))
 960                         sm_dprintf("prescan: null leading token\n");
 961                 return NULL;
 962         }
 963         return av;
 964 }
 965 /*
 966 **  REWRITE -- apply rewrite rules to token vector.
 967 **
 968 **      This routine is an ordered production system.  Each rewrite
 969 **      rule has a LHS (called the pattern) and a RHS (called the
 970 **      rewrite); 'rwr' points the the current rewrite rule.
 971 **
 972 **      For each rewrite rule, 'avp' points the address vector we
 973 **      are trying to match against, and 'pvp' points to the pattern.
 974 **      If pvp points to a special match value (MATCHZANY, MATCHANY,
 975 **      MATCHONE, MATCHCLASS, MATCHNCLASS) then the address in avp
 976 **      matched is saved away in the match vector (pointed to by 'mvp').
 977 **
 978 **      When a match between avp & pvp does not match, we try to
 979 **      back out.  If we back up over MATCHONE, MATCHCLASS, or MATCHNCLASS
 980 **      we must also back out the match in mvp.  If we reach a
 981 **      MATCHANY or MATCHZANY we just extend the match and start
 982 **      over again.
 983 **
 984 **      When we finally match, we rewrite the address vector
 985 **      and try over again.
 986 **
 987 **      Parameters:
 988 **              pvp -- pointer to token vector.
 989 **              ruleset -- the ruleset to use for rewriting.
 990 **              reclevel -- recursion level (to catch loops).
 991 **              e -- the current envelope.
 992 **              maxatom -- maximum length of buffer (usually MAXATOM)
 993 **
 994 **      Returns:
 995 **              A status code.  If EX_TEMPFAIL, higher level code should
 996 **                      attempt recovery.
 997 **
 998 **      Side Effects:
 999 **              pvp is modified.
1000 */
1001
1002 struct match
1003 {
1004         char    **match_first;          /* first token matched */
1005         char    **match_last;           /* last token matched */
1006         char    **match_pattern;        /* pointer to pattern */
1007 };
1008
1009 int
1010 rewrite(pvp, ruleset, reclevel, e, maxatom)
1011         char **pvp;
1012         int ruleset;
1013         int reclevel;
1014         register ENVELOPE *e;
1015         int maxatom;
1016 {
1017         register char *ap;              /* address pointer */
1018         register char *rp;              /* rewrite pointer */
1019         register char *rulename;        /* ruleset name */
1020         register char *prefix;
1021         register char **avp;            /* address vector pointer */
1022         register char **rvp;            /* rewrite vector pointer */
1023         register struct match *mlp;     /* cur ptr into mlist */
1024         register struct rewrite *rwr;   /* pointer to current rewrite rule */
1025         int ruleno;                     /* current rule number */
1026         int rstat = EX_OK;              /* return status */
1027         int loopcount;
1028         struct match mlist[MAXMATCH];   /* stores match on LHS */
1029         char *npvp[MAXATOM + 1];        /* temporary space for rebuild */
1030         char buf[MAXLINE];
1031         char name[6];
1032
1033         /*
1034         **  mlp will not exceed mlist[] because readcf enforces
1035         **      the upper limit of entries when reading rulesets.
1036         */
1037
1038         if (ruleset < 0 || ruleset >= MAXRWSETS)
1039         {
1040                 syserr("554 5.3.5 rewrite: illegal ruleset number %d", ruleset);
1041                 return EX_CONFIG;
1042         }
1043         rulename = RuleSetNames[ruleset];
1044         if (rulename == NULL)
1045         {
1046                 (void) sm_snprintf(name, sizeof(name), "%d", ruleset);
1047                 rulename = name;
1048         }
1049         if (OpMode == MD_TEST)
1050                 prefix = "";
1051         else
1052                 prefix = "rewrite: ruleset ";
1053         if (OpMode == MD_TEST)
1054         {
1055                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
1056                                      "%s%-16.16s   input:", prefix, rulename);
1057                 printav(smioout, pvp);
1058         }
1059         else if (tTd(21, 1))
1060         {
1061                 sm_dprintf("%s%-16.16s   input:", prefix, rulename);
1062                 printav(sm_debug_file(), pvp);
1063         }
1064         if (reclevel++ > MaxRuleRecursion)
1065         {
1066                 syserr("rewrite: excessive recursion (max %d), ruleset %s",
1067                         MaxRuleRecursion, rulename);
1068                 return EX_CONFIG;
1069         }
1070         if (pvp == NULL)
1071                 return EX_USAGE;
1072         if (maxatom <= 0)
1073                 return EX_USAGE;
1074
1075         /*
1076         **  Run through the list of rewrite rules, applying
1077         **      any that match.
1078         */
1079
1080         ruleno = 1;
1081         loopcount = 0;
1082         for (rwr = RewriteRules[ruleset]; rwr != NULL; )
1083         {
1084                 int status;
1085
1086                 /* if already canonical, quit now */
1087                 if (pvp[0] != NULL && (pvp[0][0] & 0377) == CANONNET)
1088                         break;
1089
1090                 if (tTd(21, 12))
1091                 {
1092                         if (tTd(21, 15))
1093                                 sm_dprintf("-----trying rule (line %d):",
1094                                        rwr->r_line);
1095                         else
1096                                 sm_dprintf("-----trying rule:");
1097                         printav(sm_debug_file(), rwr->r_lhs);
1098                 }
1099
1100                 /* try to match on this rule */
1101                 mlp = mlist;
1102                 rvp = rwr->r_lhs;
1103                 avp = pvp;
1104                 if (++loopcount > 100)
1105                 {
1106                         syserr("554 5.3.5 Infinite loop in ruleset %s, rule %d",
1107                                 rulename, ruleno);
1108                         if (tTd(21, 1))
1109                         {
1110                                 sm_dprintf("workspace: ");
1111                                 printav(sm_debug_file(), pvp);
1112                         }
1113                         break;
1114                 }
1115
1116                 while ((ap = *avp) != NULL || *rvp != NULL)
1117                 {
1118                         rp = *rvp;
1119                         if (tTd(21, 35))
1120                         {
1121                                 sm_dprintf("ADVANCE rp=");
1122                                 xputs(sm_debug_file(), rp);
1123                                 sm_dprintf(", ap=");
1124                                 xputs(sm_debug_file(), ap);
1125                                 sm_dprintf("\n");
1126                         }
1127                         if (rp == NULL)
1128                         {
1129                                 /* end-of-pattern before end-of-address */
1130                                 goto backup;
1131                         }
1132                         if (ap == NULL &&
1133                             (rp[0] & 0377) != MATCHZANY &&
1134                             (rp[0] & 0377) != MATCHZERO)
1135                         {
1136                                 /* end-of-input with patterns left */
1137                                 goto backup;
1138                         }
1139
1140                         switch (rp[0] & 0377)
1141                         {
1142                           case MATCHCLASS:
1143                                 /* match any phrase in a class */
1144                                 mlp->match_pattern = rvp;
1145                                 mlp->match_first = avp;
1146         extendclass:
1147                                 ap = *avp;
1148                                 if (ap == NULL)
1149                                         goto backup;
1150                                 mlp->match_last = avp++;
1151                                 cataddr(mlp->match_first, mlp->match_last,
1152                                         buf, sizeof(buf), '\0', true);
1153                                 if (!wordinclass(buf, rp[1]))
1154                                 {
1155                                         if (tTd(21, 36))
1156                                         {
1157                                                 sm_dprintf("EXTEND  rp=");
1158                                                 xputs(sm_debug_file(), rp);
1159                                                 sm_dprintf(", ap=");
1160                                                 xputs(sm_debug_file(), ap);
1161                                                 sm_dprintf("\n");
1162                                         }
1163                                         goto extendclass;
1164                                 }
1165                                 if (tTd(21, 36))
1166                                         sm_dprintf("CLMATCH\n");
1167                                 mlp++;
1168                                 break;
1169
1170                           case MATCHNCLASS:
1171                                 /* match any token not in a class */
1172                                 if (wordinclass(ap, rp[1]))
1173                                         goto backup;
1174
1175                                 /* FALLTHROUGH */
1176
1177                           case MATCHONE:
1178                           case MATCHANY:
1179                                 /* match exactly one token */
1180                                 mlp->match_pattern = rvp;
1181                                 mlp->match_first = avp;
1182                                 mlp->match_last = avp++;
1183                                 mlp++;
1184                                 break;
1185
1186                           case MATCHZANY:
1187                                 /* match zero or more tokens */
1188                                 mlp->match_pattern = rvp;
1189                                 mlp->match_first = avp;
1190                                 mlp->match_last = avp - 1;
1191                                 mlp++;
1192                                 break;
1193
1194                           case MATCHZERO:
1195                                 /* match zero tokens */
1196                                 break;
1197
1198                           case MACRODEXPAND:
1199                                 /*
1200                                 **  Match against run-time macro.
1201                                 **  This algorithm is broken for the
1202                                 **  general case (no recursive macros,
1203                                 **  improper tokenization) but should
1204                                 **  work for the usual cases.
1205                                 */
1206
1207                                 ap = macvalue(rp[1], e);
1208                                 mlp->match_first = avp;
1209                                 if (tTd(21, 2))
1210                                         sm_dprintf("rewrite: LHS $&{%s} => \"%s\"\n",
1211                                                 macname(rp[1]),
1212                                                 ap == NULL ? "(NULL)" : ap);
1213
1214                                 if (ap == NULL)
1215                                         break;
1216                                 while (*ap != '\0')
1217                                 {
1218                                         if (*avp == NULL ||
1219                                             sm_strncasecmp(ap, *avp,
1220                                                            strlen(*avp)) != 0)
1221                                         {
1222                                                 /* no match */
1223                                                 avp = mlp->match_first;
1224                                                 goto backup;
1225                                         }
1226                                         ap += strlen(*avp++);
1227                                 }
1228
1229                                 /* match */
1230                                 break;
1231
1232                           default:
1233                                 /* must have exact match */
1234                                 if (sm_strcasecmp(rp, ap))
1235                                         goto backup;
1236                                 avp++;
1237                                 break;
1238                         }
1239
1240                         /* successful match on this token */
1241                         rvp++;
1242                         continue;
1243
1244           backup:
1245                         /* match failed -- back up */
1246                         while (--mlp >= mlist)
1247                         {
1248                                 rvp = mlp->match_pattern;
1249                                 rp = *rvp;
1250                                 avp = mlp->match_last + 1;
1251                                 ap = *avp;
1252
1253                                 if (tTd(21, 36))
1254                                 {
1255                                         sm_dprintf("BACKUP  rp=");
1256                                         xputs(sm_debug_file(), rp);
1257                                         sm_dprintf(", ap=");
1258                                         xputs(sm_debug_file(), ap);
1259                                         sm_dprintf("\n");
1260                                 }
1261
1262                                 if (ap == NULL)
1263                                 {
1264                                         /* run off the end -- back up again */
1265                                         continue;
1266                                 }
1267
1268                                 if ((rp[0] & 0377) == MATCHANY ||
1269                                     (rp[0] & 0377) == MATCHZANY)
1270                                 {
1271                                         /* extend binding and continue */
1272                                         mlp->match_last = avp++;
1273                                         rvp++;
1274                                         mlp++;
1275                                         break;
1276                                 }
1277                                 if ((rp[0] & 0377) == MATCHCLASS)
1278                                 {
1279                                         /* extend binding and try again */
1280                                         mlp->match_last = avp;
1281                                         goto extendclass;
1282                                 }
1283                         }
1284
1285                         if (mlp < mlist)
1286                         {
1287                                 /* total failure to match */
1288                                 break;
1289                         }
1290                 }
1291
1292                 /*
1293                 **  See if we successfully matched
1294                 */
1295
1296                 if (mlp < mlist || *rvp != NULL)
1297                 {
1298                         if (tTd(21, 10))
1299                                 sm_dprintf("----- rule fails\n");
1300                         rwr = rwr->r_next;
1301                         ruleno++;
1302                         loopcount = 0;
1303                         continue;
1304                 }
1305
1306                 rvp = rwr->r_rhs;
1307                 if (tTd(21, 12))
1308                 {
1309                         sm_dprintf("-----rule matches:");
1310                         printav(sm_debug_file(), rvp);
1311                 }
1312
1313                 rp = *rvp;
1314                 if (rp != NULL)
1315                 {
1316                         if ((rp[0] & 0377) == CANONUSER)
1317                         {
1318                                 rvp++;
1319                                 rwr = rwr->r_next;
1320                                 ruleno++;
1321                                 loopcount = 0;
1322                         }
1323                         else if ((rp[0] & 0377) == CANONHOST)
1324                         {
1325                                 rvp++;
1326                                 rwr = NULL;
1327                         }
1328                 }
1329
1330                 /* substitute */
1331                 for (avp = npvp; *rvp != NULL; rvp++)
1332                 {
1333                         register struct match *m;
1334                         register char **pp;
1335
1336                         rp = *rvp;
1337                         if ((rp[0] & 0377) == MATCHREPL)
1338                         {
1339                                 /* substitute from LHS */
1340                                 m = &mlist[rp[1] - '1'];
1341                                 if (m < mlist || m >= mlp)
1342                                 {
1343                                         syserr("554 5.3.5 rewrite: ruleset %s: replacement $%c out of bounds",
1344                                                 rulename, rp[1]);
1345                                         return EX_CONFIG;
1346                                 }
1347                                 if (tTd(21, 15))
1348                                 {
1349                                         sm_dprintf("$%c:", rp[1]);
1350                                         pp = m->match_first;
1351                                         while (pp <= m->match_last)
1352                                         {
1353                                                 sm_dprintf(" %p=\"", *pp);
1354                                                 sm_dflush();
1355                                                 sm_dprintf("%s\"", *pp++);
1356                                         }
1357                                         sm_dprintf("\n");
1358                                 }
1359                                 pp = m->match_first;
1360                                 while (pp <= m->match_last)
1361                                 {
1362                                         if (avp >= &npvp[maxatom])
1363                                                 goto toolong;
1364                                         *avp++ = *pp++;
1365                                 }
1366                         }
1367                         else
1368                         {
1369                                 /* some sort of replacement */
1370                                 if (avp >= &npvp[maxatom])
1371                                 {
1372         toolong:
1373                                         syserr("554 5.3.0 rewrite: expansion too long");
1374                                         if (LogLevel > 9)
1375                                                 sm_syslog(LOG_ERR, e->e_id,
1376                                                         "rewrite: expansion too long, ruleset=%s, ruleno=%d",
1377                                                         rulename, ruleno);
1378                                         return EX_DATAERR;
1379                                 }
1380                                 if ((rp[0] & 0377) != MACRODEXPAND)
1381                                 {
1382                                         /* vanilla replacement from RHS */
1383                                         *avp++ = rp;
1384                                 }
1385                                 else
1386                                 {
1387                                         /* $&{x} replacement */
1388                                         char *mval = macvalue(rp[1], e);
1389                                         char **xpvp;
1390                                         size_t trsize = 0;
1391                                         static size_t pvpb1_size = 0;
1392                                         static char **pvpb1 = NULL;
1393                                         char pvpbuf[PSBUFSIZE];
1394
1395                                         if (tTd(21, 2))
1396                                                 sm_dprintf("rewrite: RHS $&{%s} => \"%s\"\n",
1397                                                         macname(rp[1]),
1398                                                         mval == NULL ? "(NULL)" : mval);
1399                                         if (mval == NULL || *mval == '\0')
1400                                                 continue;
1401
1402                                         /* save the remainder of the input */
1403                                         for (xpvp = pvp; *xpvp != NULL; xpvp++)
1404                                                 trsize += sizeof(*xpvp);
1405                                         if (trsize > pvpb1_size)
1406                                         {
1407                                                 if (pvpb1 != NULL)
1408                                                         sm_free(pvpb1);
1409                                                 pvpb1 = (char **)
1410                                                         sm_pmalloc_x(trsize);
1411                                                 pvpb1_size = trsize;
1412                                         }
1413
1414                                         memmove((char *) pvpb1,
1415                                                 (char *) pvp,
1416                                                 trsize);
1417
1418                                         /* scan the new replacement */
1419                                         xpvp = prescan(mval, '\0', pvpbuf,
1420                                                        sizeof(pvpbuf), NULL,
1421                                                        NULL, false);
1422                                         if (xpvp == NULL)
1423                                         {
1424                                                 /* prescan pre-printed error */
1425                                                 return EX_DATAERR;
1426                                         }
1427
1428                                         /* insert it into the output stream */
1429                                         while (*xpvp != NULL)
1430                                         {
1431                                                 if (tTd(21, 19))
1432                                                         sm_dprintf(" ... %s\n",
1433                                                                 *xpvp);
1434                                                 *avp++ = sm_rpool_strdup_x(
1435                                                         e->e_rpool, *xpvp);
1436                                                 if (avp >= &npvp[maxatom])
1437                                                         goto toolong;
1438                                                 xpvp++;
1439                                         }
1440                                         if (tTd(21, 19))
1441                                                 sm_dprintf(" ... DONE\n");
1442
1443                                         /* restore the old trailing input */
1444                                         memmove((char *) pvp,
1445                                                 (char *) pvpb1,
1446                                                 trsize);
1447                                 }
1448                         }
1449                 }
1450                 *avp++ = NULL;
1451
1452                 /*
1453                 **  Check for any hostname/keyword lookups.
1454                 */
1455
1456                 for (rvp = npvp; *rvp != NULL; rvp++)
1457                 {
1458                         char **hbrvp;
1459                         char **xpvp;
1460                         size_t trsize;
1461                         char *replac;
1462                         int endtoken;
1463                         STAB *map;
1464                         char *mapname;
1465                         char **key_rvp;
1466                         char **arg_rvp;
1467                         char **default_rvp;
1468                         char cbuf[MAXKEY];
1469                         char *pvpb1[MAXATOM + 1];
1470                         char *argvect[MAX_MAP_ARGS];
1471                         char pvpbuf[PSBUFSIZE];
1472                         char *nullpvp[1];
1473
1474                         hbrvp = rvp;
1475                         if ((rvp[0][0] & 0377) == HOSTBEGIN)
1476                         {
1477                                 endtoken = HOSTEND;
1478                                 mapname = "host";
1479                         }
1480                         else if ((rvp[0][0] & 0377) == LOOKUPBEGIN)
1481                         {
1482                                 endtoken = LOOKUPEND;
1483                                 mapname = *++rvp;
1484                                 if (mapname == NULL)
1485                                 {
1486                                         syserr("554 5.3.0 rewrite: missing mapname");
1487                                         /* NOTREACHED */
1488                                         SM_ASSERT(0);
1489                                 }
1490                         }
1491                         else
1492                                 continue;
1493
1494                         /*
1495                         **  Got a hostname/keyword lookup.
1496                         **
1497                         **      This could be optimized fairly easily.
1498                         */
1499
1500                         map = stab(mapname, ST_MAP, ST_FIND);
1501                         if (map == NULL)
1502                                 syserr("554 5.3.0 rewrite: map %s not found",
1503                                         mapname);
1504
1505                         /* extract the match part */
1506                         key_rvp = ++rvp;
1507                         if (key_rvp == NULL)
1508                         {
1509                                 syserr("554 5.3.0 rewrite: missing key for map %s",
1510                                         mapname);
1511                                 /* NOTREACHED */
1512                                 SM_ASSERT(0);
1513                         }
1514                         default_rvp = NULL;
1515                         arg_rvp = argvect;
1516                         xpvp = NULL;
1517                         replac = pvpbuf;
1518                         while (*rvp != NULL && ((rvp[0][0] & 0377) != endtoken))
1519                         {
1520                                 int nodetype = rvp[0][0] & 0377;
1521
1522                                 if (nodetype != CANONHOST &&
1523                                     nodetype != CANONUSER)
1524                                 {
1525                                         rvp++;
1526                                         continue;
1527                                 }
1528
1529                                 *rvp++ = NULL;
1530
1531                                 if (xpvp != NULL)
1532                                 {
1533                                         cataddr(xpvp, NULL, replac,
1534                                                 &pvpbuf[sizeof(pvpbuf)] - replac,
1535                                                 '\0', false);
1536                                         if (arg_rvp <
1537                                             &argvect[MAX_MAP_ARGS - 1])
1538                                                 *++arg_rvp = replac;
1539                                         replac += strlen(replac) + 1;
1540                                         xpvp = NULL;
1541                                 }
1542                                 switch (nodetype)
1543                                 {
1544                                   case CANONHOST:
1545                                         xpvp = rvp;
1546                                         break;
1547
1548                                   case CANONUSER:
1549                                         default_rvp = rvp;
1550                                         break;
1551                                 }
1552                         }
1553                         if (*rvp != NULL)
1554                                 *rvp++ = NULL;
1555                         if (xpvp != NULL)
1556                         {
1557                                 cataddr(xpvp, NULL, replac,
1558                                         &pvpbuf[sizeof(pvpbuf)] - replac,
1559                                         '\0', false);
1560                                 if (arg_rvp < &argvect[MAX_MAP_ARGS - 1])
1561                                         *++arg_rvp = replac;
1562                         }
1563                         if (arg_rvp >= &argvect[MAX_MAP_ARGS - 1])
1564                                 argvect[MAX_MAP_ARGS - 1] = NULL;
1565                         else
1566                                 *++arg_rvp = NULL;
1567
1568                         /* save the remainder of the input string */
1569                         trsize = (avp - rvp + 1) * sizeof(*rvp);
1570                         memmove((char *) pvpb1, (char *) rvp, trsize);
1571
1572                         /* look it up */
1573                         cataddr(key_rvp, NULL, cbuf, sizeof(cbuf),
1574                                 map == NULL ? '\0' : map->s_map.map_spacesub,
1575                                 true);
1576                         argvect[0] = cbuf;
1577                         replac = map_lookup(map, cbuf, argvect, &rstat, e);
1578
1579                         /* if no replacement, use default */
1580                         if (replac == NULL && default_rvp != NULL)
1581                         {
1582                                 /* create the default */
1583                                 cataddr(default_rvp, NULL, cbuf, sizeof(cbuf),
1584                                         '\0', false);
1585                                 replac = cbuf;
1586                         }
1587
1588                         if (replac == NULL)
1589                         {
1590                                 xpvp = key_rvp;
1591                         }
1592                         else if (*replac == '\0')
1593                         {
1594                                 /* null replacement */
1595                                 nullpvp[0] = NULL;
1596                                 xpvp = nullpvp;
1597                         }
1598                         else
1599                         {
1600                                 /* scan the new replacement */
1601                                 xpvp = prescan(replac, '\0', pvpbuf,
1602                                                sizeof(pvpbuf), NULL, NULL,
1603                                                false);
1604                                 if (xpvp == NULL)
1605                                 {
1606                                         /* prescan already printed error */
1607                                         return EX_DATAERR;
1608                                 }
1609                         }
1610
1611                         /* append it to the token list */
1612                         for (avp = hbrvp; *xpvp != NULL; xpvp++)
1613                         {
1614                                 *avp++ = sm_rpool_strdup_x(e->e_rpool, *xpvp);
1615                                 if (avp >= &npvp[maxatom])
1616                                         goto toolong;
1617                         }
1618
1619                         /* restore the old trailing information */
1620                         rvp = avp - 1;
1621                         for (xpvp = pvpb1; (*avp++ = *xpvp++) != NULL; )
1622                                 if (avp >= &npvp[maxatom])
1623                                         goto toolong;
1624                 }
1625
1626                 /*
1627                 **  Check for subroutine calls.
1628                 */
1629
1630                 status = callsubr(npvp, reclevel, e);
1631                 if (rstat == EX_OK || status == EX_TEMPFAIL)
1632                         rstat = status;
1633
1634                 /* copy vector back into original space. */
1635                 for (avp = npvp; *avp++ != NULL;)
1636                         continue;
1637                 memmove((char *) pvp, (char *) npvp,
1638                       (int) (avp - npvp) * sizeof(*avp));
1639
1640                 if (tTd(21, 4))
1641                 {
1642                         sm_dprintf("rewritten as:");
1643                         printav(sm_debug_file(), pvp);
1644                 }
1645         }
1646
1647         if (OpMode == MD_TEST)
1648         {
1649                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
1650                                      "%s%-16.16s returns:", prefix, rulename);
1651                 printav(smioout, pvp);
1652         }
1653         else if (tTd(21, 1))
1654         {
1655                 sm_dprintf("%s%-16.16s returns:", prefix, rulename);
1656                 printav(sm_debug_file(), pvp);
1657         }
1658         return rstat;
1659 }
1660 /*
1661 **  CALLSUBR -- call subroutines in rewrite vector
1662 **
1663 **      Parameters:
1664 **              pvp -- pointer to token vector.
1665 **              reclevel -- the current recursion level.
1666 **              e -- the current envelope.
1667 **
1668 **      Returns:
1669 **              The status from the subroutine call.
1670 **
1671 **      Side Effects:
1672 **              pvp is modified.
1673 */
1674
1675 static int
1676 callsubr(pvp, reclevel, e)
1677         char **pvp;
1678         int reclevel;
1679         ENVELOPE *e;
1680 {
1681         char **avp;
1682         register int i;
1683         int subr, j;
1684         int nsubr;
1685         int status;
1686         int rstat = EX_OK;
1687 #define MAX_SUBR        16
1688         int subrnumber[MAX_SUBR];
1689         int subrindex[MAX_SUBR];
1690
1691         nsubr = 0;
1692
1693         /*
1694         **  Look for subroutine calls in pvp, collect them into subr*[]
1695         **  We will perform the calls in the next loop, because we will
1696         **  call the "last" subroutine first to avoid recursive calls
1697         **  and too much copying.
1698         */
1699
1700         for (avp = pvp, j = 0; *avp != NULL; avp++, j++)
1701         {
1702                 if ((avp[0][0] & 0377) == CALLSUBR && avp[1] != NULL)
1703                 {
1704                         stripquotes(avp[1]);
1705                         subr = strtorwset(avp[1], NULL, ST_FIND);
1706                         if (subr < 0)
1707                         {
1708                                 syserr("554 5.3.5 Unknown ruleset %s", avp[1]);
1709                                 return EX_CONFIG;
1710                         }
1711
1712                         /*
1713                         **  XXX instead of doing this we could optimize
1714                         **  the rules after reading them: just remove
1715                         **  calls to empty rulesets
1716                         */
1717
1718                         /* subroutine is an empty ruleset?  don't call it */
1719                         if (RewriteRules[subr] == NULL)
1720                         {
1721                                 if (tTd(21, 3))
1722                                         sm_dprintf("-----skip subr %s (%d)\n",
1723                                                 avp[1], subr);
1724                                 for (i = 2; avp[i] != NULL; i++)
1725                                         avp[i - 2] = avp[i];
1726                                 avp[i - 2] = NULL;
1727                                 continue;
1728                         }
1729                         if (++nsubr >= MAX_SUBR)
1730                         {
1731                                 syserr("554 5.3.0 Too many subroutine calls (%d max)",
1732                                         MAX_SUBR);
1733                                 return EX_CONFIG;
1734                         }
1735                         subrnumber[nsubr] = subr;
1736                         subrindex[nsubr] = j;
1737                 }
1738         }
1739
1740         /*
1741         **  Perform the actual subroutines calls, "last" one first, i.e.,
1742         **  go from the right to the left through all calls,
1743         **  do the rewriting in place.
1744         */
1745
1746         for (; nsubr > 0; nsubr--)
1747         {
1748                 subr = subrnumber[nsubr];
1749                 avp = pvp + subrindex[nsubr];
1750
1751                 /* remove the subroutine call and name */
1752                 for (i = 2; avp[i] != NULL; i++)
1753                         avp[i - 2] = avp[i];
1754                 avp[i - 2] = NULL;
1755
1756                 /*
1757                 **  Now we need to call the ruleset specified for
1758                 **  the subroutine. We can do this in place since
1759                 **  we call the "last" subroutine first.
1760                 */
1761
1762                 status = rewrite(avp, subr, reclevel, e,
1763                                 MAXATOM - subrindex[nsubr]);
1764                 if (status != EX_OK && status != EX_TEMPFAIL)
1765                         return status;
1766                 if (rstat == EX_OK || status == EX_TEMPFAIL)
1767                         rstat = status;
1768         }
1769         return rstat;
1770 }
1771 /*
1772 **  MAP_LOOKUP -- do lookup in map
1773 **
1774 **      Parameters:
1775 **              smap -- the map to use for the lookup.
1776 **              key -- the key to look up.
1777 **              argvect -- arguments to pass to the map lookup.
1778 **              pstat -- a pointer to an integer in which to store the
1779 **                      status from the lookup.
1780 **              e -- the current envelope.
1781 **
1782 **      Returns:
1783 **              The result of the lookup.
1784 **              NULL -- if there was no data for the given key.
1785 */
1786
1787 static char *
1788 map_lookup(smap, key, argvect, pstat, e)
1789         STAB *smap;
1790         char key[];
1791         char **argvect;
1792         int *pstat;
1793         ENVELOPE *e;
1794 {
1795         auto int status = EX_OK;
1796         MAP *map;
1797         char *replac;
1798
1799         if (smap == NULL)
1800                 return NULL;
1801
1802         map = &smap->s_map;
1803         DYNOPENMAP(map);
1804
1805         if (e->e_sendmode == SM_DEFER &&
1806             bitset(MF_DEFER, map->map_mflags))
1807         {
1808                 /* don't do any map lookups */
1809                 if (tTd(60, 1))
1810                         sm_dprintf("map_lookup(%s, %s) => DEFERRED\n",
1811                                 smap->s_name, key);
1812                 *pstat = EX_TEMPFAIL;
1813                 return NULL;
1814         }
1815
1816         if (!bitset(MF_KEEPQUOTES, map->map_mflags))
1817                 stripquotes(key);
1818
1819         if (tTd(60, 1))
1820         {
1821                 sm_dprintf("map_lookup(%s, ", smap->s_name);
1822                 xputs(sm_debug_file(), key);
1823                 if (tTd(60, 5))
1824                 {
1825                         int i;
1826
1827                         for (i = 0; argvect[i] != NULL; i++)
1828                                 sm_dprintf(", %%%d=%s", i, argvect[i]);
1829                 }
1830                 sm_dprintf(") => ");
1831         }
1832         replac = (*map->map_class->map_lookup)(map, key, argvect, &status);
1833         if (tTd(60, 1))
1834                 sm_dprintf("%s (%d)\n",
1835                         replac != NULL ? replac : "NOT FOUND",
1836                         status);
1837
1838         /* should recover if status == EX_TEMPFAIL */
1839         if (status == EX_TEMPFAIL && !bitset(MF_NODEFER, map->map_mflags))
1840         {
1841                 *pstat = EX_TEMPFAIL;
1842                 if (tTd(60, 1))
1843                         sm_dprintf("map_lookup(%s, %s) tempfail: errno=%d\n",
1844                                 smap->s_name, key, errno);
1845                 if (e->e_message == NULL)
1846                 {
1847                         char mbuf[320];
1848
1849                         (void) sm_snprintf(mbuf, sizeof(mbuf),
1850                                 "%.80s map: lookup (%s): deferred",
1851                                 smap->s_name,
1852                                 shortenstring(key, MAXSHORTSTR));
1853                         e->e_message = sm_rpool_strdup_x(e->e_rpool, mbuf);
1854                 }
1855         }
1856         if (status == EX_TEMPFAIL && map->map_tapp != NULL)
1857         {
1858                 size_t i = strlen(key) + strlen(map->map_tapp) + 1;
1859                 static char *rwbuf = NULL;
1860                 static size_t rwbuflen = 0;
1861
1862                 if (i > rwbuflen)
1863                 {
1864                         if (rwbuf != NULL)
1865                                 sm_free(rwbuf);
1866                         rwbuflen = i;
1867                         rwbuf = (char *) sm_pmalloc_x(rwbuflen);
1868                 }
1869                 (void) sm_strlcpyn(rwbuf, rwbuflen, 2, key, map->map_tapp);
1870                 if (tTd(60, 4))
1871                         sm_dprintf("map_lookup tempfail: returning \"%s\"\n",
1872                                 rwbuf);
1873                 return rwbuf;
1874         }
1875         return replac;
1876 }
1877 /*
1878 **  INITERRMAILERS -- initialize error and discard mailers
1879 **
1880 **      Parameters:
1881 **              none.
1882 **
1883 **      Returns:
1884 **              none.
1885 **
1886 **      Side Effects:
1887 **              initializes error and discard mailers.
1888 */
1889
1890 static MAILER discardmailer;
1891 static MAILER errormailer;
1892 static char *discardargv[] = { "DISCARD", NULL };
1893 static char *errorargv[] = { "ERROR", NULL };
1894
1895 void
1896 initerrmailers()
1897 {
1898         if (discardmailer.m_name == NULL)
1899         {
1900                 /* initialize the discard mailer */
1901                 discardmailer.m_name = "*discard*";
1902                 discardmailer.m_mailer = "DISCARD";
1903                 discardmailer.m_argv = discardargv;
1904         }
1905         if (errormailer.m_name == NULL)
1906         {
1907                 /* initialize the bogus mailer */
1908                 errormailer.m_name = "*error*";
1909                 errormailer.m_mailer = "ERROR";
1910                 errormailer.m_argv = errorargv;
1911         }
1912 }
1913 /*
1914 **  BUILDADDR -- build address from token vector.
1915 **
1916 **      Parameters:
1917 **              tv -- token vector.
1918 **              a -- pointer to address descriptor to fill.
1919 **                      If NULL, one will be allocated.
1920 **              flags -- info regarding whether this is a sender or
1921 **                      a recipient.
1922 **              e -- the current envelope.
1923 **
1924 **      Returns:
1925 **              NULL if there was an error.
1926 **              'a' otherwise.
1927 **
1928 **      Side Effects:
1929 **              fills in 'a'
1930 */
1931
1932 static struct errcodes
1933 {
1934         char    *ec_name;               /* name of error code */
1935         int     ec_code;                /* numeric code */
1936 } ErrorCodes[] =
1937 {
1938         { "usage",              EX_USAGE        },
1939         { "nouser",             EX_NOUSER       },
1940         { "nohost",             EX_NOHOST       },
1941         { "unavailable",        EX_UNAVAILABLE  },
1942         { "software",           EX_SOFTWARE     },
1943         { "tempfail",           EX_TEMPFAIL     },
1944         { "protocol",           EX_PROTOCOL     },
1945         { "config",             EX_CONFIG       },
1946         { NULL,                 EX_UNAVAILABLE  }
1947 };
1948
1949 static ADDRESS *
1950 buildaddr(tv, a, flags, e)
1951         register char **tv;
1952         register ADDRESS *a;
1953         int flags;
1954         register ENVELOPE *e;
1955 {
1956         bool tempfail = false;
1957         int maxatom;
1958         struct mailer **mp;
1959         register struct mailer *m;
1960         register char *p;
1961         char *mname;
1962         char **hostp;
1963         char hbuf[MAXNAME + 1];
1964         static char ubuf[MAXNAME + 2];
1965
1966         if (tTd(24, 5))
1967         {
1968                 sm_dprintf("buildaddr, flags=%x, tv=", flags);
1969                 printav(sm_debug_file(), tv);
1970         }
1971
1972         maxatom = MAXATOM;
1973         if (a == NULL)
1974                 a = (ADDRESS *) sm_rpool_malloc_x(e->e_rpool, sizeof(*a));
1975         memset((char *) a, '\0', sizeof(*a));
1976         hbuf[0] = '\0';
1977
1978         /* set up default error return flags */
1979         a->q_flags |= DefaultNotify;
1980
1981         /* figure out what net/mailer to use */
1982         if (*tv == NULL || (**tv & 0377) != CANONNET)
1983         {
1984                 syserr("554 5.3.5 buildaddr: no mailer in parsed address");
1985 badaddr:
1986                 /*
1987                 **  ExitStat may have been set by an earlier map open
1988                 **  failure (to a permanent error (EX_OSERR) in syserr())
1989                 **  so we also need to check if this particular $#error
1990                 **  return wanted a 4XX failure.
1991                 **
1992                 **  XXX the real fix is probably to set ExitStat correctly,
1993                 **  i.e., to EX_TEMPFAIL if the map open is just a temporary
1994                 **  error.
1995                 */
1996
1997                 if (ExitStat == EX_TEMPFAIL || tempfail)
1998                         a->q_state = QS_QUEUEUP;
1999                 else
2000                 {
2001                         a->q_state = QS_BADADDR;
2002                         a->q_mailer = &errormailer;
2003                 }
2004                 return a;
2005         }
2006         mname = *++tv;
2007         --maxatom;
2008
2009         /* extract host and user portions */
2010         if (*++tv != NULL && (**tv & 0377) == CANONHOST)
2011         {
2012                 hostp = ++tv;
2013                 --maxatom;
2014         }
2015         else
2016                 hostp = NULL;
2017         --maxatom;
2018         while (*tv != NULL && (**tv & 0377) != CANONUSER)
2019         {
2020                 tv++;
2021                 --maxatom;
2022         }
2023         if (*tv == NULL)
2024         {
2025                 syserr("554 5.3.5 buildaddr: no user");
2026                 goto badaddr;
2027         }
2028         if (tv == hostp)
2029                 hostp = NULL;
2030         else if (hostp != NULL)
2031                 cataddr(hostp, tv - 1, hbuf, sizeof(hbuf), '\0', false);
2032         cataddr(++tv, NULL, ubuf, sizeof(ubuf), ' ', false);
2033         --maxatom;
2034
2035         /* save away the host name */
2036         if (sm_strcasecmp(mname, "error") == 0)
2037         {
2038                 /* Set up triplet for use by -bv */
2039                 a->q_mailer = &errormailer;
2040                 a->q_user = sm_rpool_strdup_x(e->e_rpool, ubuf);
2041                 /* XXX wrong place? */
2042
2043                 if (hostp != NULL)
2044                 {
2045                         register struct errcodes *ep;
2046
2047                         a->q_host = sm_rpool_strdup_x(e->e_rpool, hbuf);
2048                         if (strchr(hbuf, '.') != NULL)
2049                         {
2050                                 a->q_status = sm_rpool_strdup_x(e->e_rpool,
2051                                                                 hbuf);
2052                                 setstat(dsntoexitstat(hbuf));
2053                         }
2054                         else if (isascii(hbuf[0]) && isdigit(hbuf[0]))
2055                         {
2056                                 setstat(atoi(hbuf));
2057                         }
2058                         else
2059                         {
2060                                 for (ep = ErrorCodes; ep->ec_name != NULL; ep++)
2061                                         if (sm_strcasecmp(ep->ec_name, hbuf) == 0)
2062                                                 break;
2063                                 setstat(ep->ec_code);
2064                         }
2065                 }
2066                 else
2067                 {
2068                         a->q_host = NULL;
2069                         setstat(EX_UNAVAILABLE);
2070                 }
2071                 stripquotes(ubuf);
2072                 if (ISSMTPCODE(ubuf) && ubuf[3] == ' ')
2073                 {
2074                         char fmt[16];
2075                         int off;
2076
2077                         if ((off = isenhsc(ubuf + 4, ' ')) > 0)
2078                         {
2079                                 ubuf[off + 4] = '\0';
2080                                 off += 5;
2081                         }
2082                         else
2083                         {
2084                                 off = 4;
2085                                 ubuf[3] = '\0';
2086                         }
2087                         (void) sm_strlcpyn(fmt, sizeof(fmt), 2, ubuf, " %s");
2088                         if (off > 4)
2089                                 usrerr(fmt, ubuf + off);
2090                         else if (isenhsc(hbuf, '\0') > 0)
2091                                 usrerrenh(hbuf, fmt, ubuf + off);
2092                         else
2093                                 usrerr(fmt, ubuf + off);
2094                         /* XXX ubuf[off - 1] = ' '; */
2095                         if (ubuf[0] == '4')
2096                                 tempfail = true;
2097                 }
2098                 else
2099                 {
2100                         usrerr("553 5.3.0 %s", ubuf);
2101                 }
2102                 goto badaddr;
2103         }
2104
2105         for (mp = Mailer; (m = *mp++) != NULL; )
2106         {
2107                 if (sm_strcasecmp(m->m_name, mname) == 0)
2108                         break;
2109         }
2110         if (m == NULL)
2111         {
2112                 syserr("554 5.3.5 buildaddr: unknown mailer %s", mname);
2113                 goto badaddr;
2114         }
2115         a->q_mailer = m;
2116
2117         /* figure out what host (if any) */
2118         if (hostp == NULL)
2119         {
2120                 if (!bitnset(M_LOCALMAILER, m->m_flags))
2121                 {
2122                         syserr("554 5.3.5 buildaddr: no host");
2123                         goto badaddr;
2124                 }
2125                 a->q_host = NULL;
2126         }
2127         else
2128                 a->q_host = sm_rpool_strdup_x(e->e_rpool, hbuf);
2129
2130         /* figure out the user */
2131         p = ubuf;
2132         if (bitnset(M_CHECKUDB, m->m_flags) && *p == '@')
2133         {
2134                 p++;
2135                 tv++;
2136                 --maxatom;
2137                 a->q_flags |= QNOTREMOTE;
2138         }
2139
2140         /* do special mapping for local mailer */
2141         if (*p == '"')
2142                 p++;
2143         if (*p == '|' && bitnset(M_CHECKPROG, m->m_flags))
2144                 a->q_mailer = m = ProgMailer;
2145         else if (*p == '/' && bitnset(M_CHECKFILE, m->m_flags))
2146                 a->q_mailer = m = FileMailer;
2147         else if (*p == ':' && bitnset(M_CHECKINCLUDE, m->m_flags))
2148         {
2149                 /* may be :include: */
2150                 stripquotes(ubuf);
2151                 if (sm_strncasecmp(ubuf, ":include:", 9) == 0)
2152                 {
2153                         /* if :include:, don't need further rewriting */
2154                         a->q_mailer = m = InclMailer;
2155                         a->q_user = sm_rpool_strdup_x(e->e_rpool, &ubuf[9]);
2156                         return a;
2157                 }
2158         }
2159
2160         /* rewrite according recipient mailer rewriting rules */
2161         macdefine(&e->e_macro, A_PERM, 'h', a->q_host);
2162
2163         if (ConfigLevel >= 10 ||
2164             !bitset(RF_SENDERADDR|RF_HEADERADDR, flags))
2165         {
2166                 /* sender addresses done later */
2167                 (void) rewrite(tv, 2, 0, e, maxatom);
2168                 if (m->m_re_rwset > 0)
2169                        (void) rewrite(tv, m->m_re_rwset, 0, e, maxatom);
2170         }
2171         (void) rewrite(tv, 4, 0, e, maxatom);
2172
2173         /* save the result for the command line/RCPT argument */
2174         cataddr(tv, NULL, ubuf, sizeof(ubuf), '\0', true);
2175         a->q_user = sm_rpool_strdup_x(e->e_rpool, ubuf);
2176
2177         /*
2178         **  Do mapping to lower case as requested by mailer
2179         */
2180
2181         if (a->q_host != NULL && !bitnset(M_HST_UPPER, m->m_flags))
2182                 makelower(a->q_host);
2183         if (!bitnset(M_USR_UPPER, m->m_flags))
2184                 makelower(a->q_user);
2185
2186         if (tTd(24, 6))
2187         {
2188                 sm_dprintf("buildaddr => ");
2189                 printaddr(sm_debug_file(), a, false);
2190         }
2191         return a;
2192 }
2193
2194 /*
2195 **  CATADDR -- concatenate pieces of addresses (putting in <LWSP> subs)
2196 **
2197 **      Parameters:
2198 **              pvp -- parameter vector to rebuild.
2199 **              evp -- last parameter to include.  Can be NULL to
2200 **                      use entire pvp.
2201 **              buf -- buffer to build the string into.
2202 **              sz -- size of buf.
2203 **              spacesub -- the space separator character; if '\0',
2204 **                      use SpaceSub.
2205 **              external -- convert to external form?
2206 **                      (no metacharacters; METAQUOTEs removed, see below)
2207 **
2208 **      Returns:
2209 **              none.
2210 **
2211 **      Side Effects:
2212 **              Destroys buf.
2213 **
2214 **      Notes:
2215 **      There are two formats for strings: internal and external.
2216 **      The external format is just an eight-bit clean string (no
2217 **      null bytes, everything else OK).  The internal format can
2218 **      include sendmail metacharacters.  The special character
2219 **      METAQUOTE essentially quotes the character following, stripping
2220 **      it of all special semantics.
2221 **
2222 **      The cataddr routine needs to be aware of whether it is producing
2223 **      an internal or external form as output (it only takes internal
2224 **      form as input).
2225 **
2226 **      The parseaddr routine has a similar issue on input, but that
2227 **      is flagged on the basis of which token table is passed in.
2228 */
2229
2230 void
2231 cataddr(pvp, evp, buf, sz, spacesub, external)
2232         char **pvp;
2233         char **evp;
2234         char *buf;
2235         register int sz;
2236         int spacesub;
2237         bool external;
2238 {
2239         bool oatomtok, natomtok;
2240         char *p;
2241
2242         oatomtok = natomtok = false;
2243         if (tTd(59, 14))
2244         {
2245                 sm_dprintf("cataddr(%d) <==", external);
2246                 printav(sm_debug_file(), pvp);
2247         }
2248
2249         if (sz <= 0)
2250                 return;
2251
2252         if (spacesub == '\0')
2253                 spacesub = SpaceSub;
2254
2255         if (pvp == NULL)
2256         {
2257                 *buf = '\0';
2258                 return;
2259         }
2260         p = buf;
2261         sz -= 2;
2262         while (*pvp != NULL && sz > 0)
2263         {
2264                 char *q;
2265
2266                 natomtok = (ExtTokenTab[**pvp & 0xff] == ATM);
2267                 if (oatomtok && natomtok)
2268                 {
2269                         *p++ = spacesub;
2270                         if (--sz <= 0)
2271                                 break;
2272                 }
2273                 for (q = *pvp; *q != '\0'; )
2274                 {
2275                         int c;
2276
2277                         if (--sz <= 0)
2278                                 break;
2279                         *p++ = c = *q++;
2280
2281                         /*
2282                         **  If the current character (c) is METAQUOTE and we
2283                         **  want the "external" form and the next character
2284                         **  is not NUL, then overwrite METAQUOTE with that
2285                         **  character (i.e., METAQUOTE ch is changed to
2286                         **  ch).  p[-1] is used because p is advanced (above).
2287                         */
2288
2289                         if ((c & 0377) == METAQUOTE && external && *q != '\0')
2290                                 p[-1] = *q++;
2291                 }
2292                 if (sz <= 0)
2293                         break;
2294                 oatomtok = natomtok;
2295                 if (pvp++ == evp)
2296                         break;
2297         }
2298
2299 #if 0
2300         /*
2301         **  Silently truncate long strings: even though this doesn't
2302         **  seem like a good idea it is necessary because header checks
2303         **  send the whole header value to rscheck() and hence rewrite().
2304         **  The latter however sometimes uses a "short" buffer (e.g.,
2305         **  cbuf[MAXNAME + 1]) to call cataddr() which then triggers this
2306         **  error function.  One possible fix to the problem is to pass
2307         **  flags to rscheck() and rewrite() to distinguish the various
2308         **  calls and only trigger the error if necessary.  For now just
2309         **  undo the change from 8.13.0.
2310         */
2311
2312         if (sz <= 0)
2313                 usrerr("cataddr: string too long");
2314 #endif
2315         *p = '\0';
2316
2317         if (tTd(59, 14))
2318                 sm_dprintf("  cataddr => %s\n", str2prt(buf));
2319 }
2320
2321 /*
2322 **  SAMEADDR -- Determine if two addresses are the same
2323 **
2324 **      This is not just a straight comparison -- if the mailer doesn't
2325 **      care about the host we just ignore it, etc.
2326 **
2327 **      Parameters:
2328 **              a, b -- pointers to the internal forms to compare.
2329 **
2330 **      Returns:
2331 **              true -- they represent the same mailbox.
2332 **              false -- they don't.
2333 **
2334 **      Side Effects:
2335 **              none.
2336 */
2337
2338 bool
2339 sameaddr(a, b)
2340         register ADDRESS *a;
2341         register ADDRESS *b;
2342 {
2343         register ADDRESS *ca, *cb;
2344
2345         /* if they don't have the same mailer, forget it */
2346         if (a->q_mailer != b->q_mailer)
2347                 return false;
2348
2349         /* if the user isn't the same, we can drop out */
2350         if (strcmp(a->q_user, b->q_user) != 0)
2351                 return false;
2352
2353         /* if we have good uids for both but they differ, these are different */
2354         if (a->q_mailer == ProgMailer)
2355         {
2356                 ca = getctladdr(a);
2357                 cb = getctladdr(b);
2358                 if (ca != NULL && cb != NULL &&
2359                     bitset(QGOODUID, ca->q_flags & cb->q_flags) &&
2360                     ca->q_uid != cb->q_uid)
2361                         return false;
2362         }
2363
2364         /* otherwise compare hosts (but be careful for NULL ptrs) */
2365         if (a->q_host == b->q_host)
2366         {
2367                 /* probably both null pointers */
2368                 return true;
2369         }
2370         if (a->q_host == NULL || b->q_host == NULL)
2371         {
2372                 /* only one is a null pointer */
2373                 return false;
2374         }
2375         if (strcmp(a->q_host, b->q_host) != 0)
2376                 return false;
2377
2378         return true;
2379 }
2380 /*
2381 **  PRINTADDR -- print address (for debugging)
2382 **
2383 **      Parameters:
2384 **              a -- the address to print
2385 **              follow -- follow the q_next chain.
2386 **
2387 **      Returns:
2388 **              none.
2389 **
2390 **      Side Effects:
2391 **              none.
2392 */
2393
2394 struct qflags
2395 {
2396         char            *qf_name;
2397         unsigned long   qf_bit;
2398 };
2399
2400 static struct qflags    AddressFlags[] =
2401 {
2402         { "QGOODUID",           QGOODUID        },
2403         { "QPRIMARY",           QPRIMARY        },
2404         { "QNOTREMOTE",         QNOTREMOTE      },
2405         { "QSELFREF",           QSELFREF        },
2406         { "QBOGUSSHELL",        QBOGUSSHELL     },
2407         { "QUNSAFEADDR",        QUNSAFEADDR     },
2408         { "QPINGONSUCCESS",     QPINGONSUCCESS  },
2409         { "QPINGONFAILURE",     QPINGONFAILURE  },
2410         { "QPINGONDELAY",       QPINGONDELAY    },
2411         { "QHASNOTIFY",         QHASNOTIFY      },
2412         { "QRELAYED",           QRELAYED        },
2413         { "QEXPANDED",          QEXPANDED       },
2414         { "QDELIVERED",         QDELIVERED      },
2415         { "QDELAYED",           QDELAYED        },
2416         { "QTHISPASS",          QTHISPASS       },
2417         { "QRCPTOK",            QRCPTOK         },
2418         { NULL,                 0               }
2419 };
2420
2421 void
2422 printaddr(fp, a, follow)
2423         SM_FILE_T *fp;
2424         register ADDRESS *a;
2425         bool follow;
2426 {
2427         register MAILER *m;
2428         MAILER pseudomailer;
2429         register struct qflags *qfp;
2430         bool firstone;
2431
2432         if (a == NULL)
2433         {
2434                 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, "[NULL]\n");
2435                 return;
2436         }
2437
2438         while (a != NULL)
2439         {
2440                 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, "%p=", a);
2441                 (void) sm_io_flush(fp, SM_TIME_DEFAULT);
2442
2443                 /* find the mailer -- carefully */
2444                 m = a->q_mailer;
2445                 if (m == NULL)
2446                 {
2447                         m = &pseudomailer;
2448                         m->m_mno = -1;
2449                         m->m_name = "NULL";
2450                 }
2451
2452                 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2453                                      "%s:\n\tmailer %d (%s), host `%s'\n",
2454                                      a->q_paddr == NULL ? "<null>" : a->q_paddr,
2455                                      m->m_mno, m->m_name,
2456                                      a->q_host == NULL ? "<null>" : a->q_host);
2457                 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2458                                      "\tuser `%s', ruser `%s'\n",
2459                                      a->q_user,
2460                                      a->q_ruser == NULL ? "<null>" : a->q_ruser);
2461                 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, "\tstate=");
2462                 switch (a->q_state)
2463                 {
2464                   case QS_OK:
2465                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, "OK");
2466                         break;
2467
2468                   case QS_DONTSEND:
2469                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2470                                              "DONTSEND");
2471                         break;
2472
2473                   case QS_BADADDR:
2474                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2475                                              "BADADDR");
2476                         break;
2477
2478                   case QS_QUEUEUP:
2479                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2480                                              "QUEUEUP");
2481                         break;
2482
2483                   case QS_RETRY:
2484                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, "RETRY");
2485                         break;
2486
2487                   case QS_SENT:
2488                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, "SENT");
2489                         break;
2490
2491                   case QS_VERIFIED:
2492                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2493                                              "VERIFIED");
2494                         break;
2495
2496                   case QS_EXPANDED:
2497                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2498                                              "EXPANDED");
2499                         break;
2500
2501                   case QS_SENDER:
2502                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2503                                              "SENDER");
2504                         break;
2505
2506                   case QS_CLONED:
2507                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2508                                              "CLONED");
2509                         break;
2510
2511                   case QS_DISCARDED:
2512                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2513                                              "DISCARDED");
2514                         break;
2515
2516                   case QS_REPLACED:
2517                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2518                                              "REPLACED");
2519                         break;
2520
2521                   case QS_REMOVED:
2522                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2523                                              "REMOVED");
2524                         break;
2525
2526                   case QS_DUPLICATE:
2527                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2528                                              "DUPLICATE");
2529                         break;
2530
2531                   case QS_INCLUDED:
2532                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2533                                              "INCLUDED");
2534                         break;
2535
2536                   default:
2537                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2538                                              "%d", a->q_state);
2539                         break;
2540                 }
2541                 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2542                                      ", next=%p, alias %p, uid %d, gid %d\n",
2543                                      a->q_next, a->q_alias,
2544                                      (int) a->q_uid, (int) a->q_gid);
2545                 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, "\tflags=%lx<",
2546                                      a->q_flags);
2547                 firstone = true;
2548                 for (qfp = AddressFlags; qfp->qf_name != NULL; qfp++)
2549                 {
2550                         if (!bitset(qfp->qf_bit, a->q_flags))
2551                                 continue;
2552                         if (!firstone)
2553                                 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2554                                                      ",");
2555                         firstone = false;
2556                         (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, "%s",
2557                                              qfp->qf_name);
2558                 }
2559                 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, ">\n");
2560                 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2561                                      "\towner=%s, home=\"%s\", fullname=\"%s\"\n",
2562                                      a->q_owner == NULL ? "(none)" : a->q_owner,
2563                                      a->q_home == NULL ? "(none)" : a->q_home,
2564                                      a->q_fullname == NULL ? "(none)" : a->q_fullname);
2565                 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2566                                      "\torcpt=\"%s\", statmta=%s, status=%s\n",
2567                                      a->q_orcpt == NULL ? "(none)" : a->q_orcpt,
2568                                      a->q_statmta == NULL ? "(none)" : a->q_statmta,
2569                                      a->q_status == NULL ? "(none)" : a->q_status);
2570                 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2571                                      "\tfinalrcpt=\"%s\"\n",
2572                                      a->q_finalrcpt == NULL ? "(none)" : a->q_finalrcpt);
2573                 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2574                                      "\trstatus=\"%s\"\n",
2575                                      a->q_rstatus == NULL ? "(none)" : a->q_rstatus);
2576                 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
2577                                      "\tstatdate=%s\n",
2578                                      a->q_statdate == 0 ? "(none)" : ctime(&a->q_statdate));
2579
2580                 if (!follow)
2581                         return;
2582                 a = a->q_next;
2583         }
2584 }
2585 /*
2586 **  EMPTYADDR -- return true if this address is empty (``<>'')
2587 **
2588 **      Parameters:
2589 **              a -- pointer to the address
2590 **
2591 **      Returns:
2592 **              true -- if this address is "empty" (i.e., no one should
2593 **                      ever generate replies to it.
2594 **              false -- if it is a "regular" (read: replyable) address.
2595 */
2596
2597 bool
2598 emptyaddr(a)
2599         register ADDRESS *a;
2600 {
2601         return a->q_paddr == NULL || strcmp(a->q_paddr, "<>") == 0 ||
2602                a->q_user == NULL || strcmp(a->q_user, "<>") == 0;
2603 }
2604 /*
2605 **  REMOTENAME -- return the name relative to the current mailer
2606 **
2607 **      Parameters:
2608 **              name -- the name to translate.
2609 **              m -- the mailer that we want to do rewriting relative to.
2610 **              flags -- fine tune operations.
2611 **              pstat -- pointer to status word.
2612 **              e -- the current envelope.
2613 **
2614 **      Returns:
2615 **              the text string representing this address relative to
2616 **                      the receiving mailer.
2617 **
2618 **      Side Effects:
2619 **              none.
2620 **
2621 **      Warnings:
2622 **              The text string returned is tucked away locally;
2623 **                      copy it if you intend to save it.
2624 */
2625
2626 char *
2627 remotename(name, m, flags, pstat, e)
2628         char *name;
2629         struct mailer *m;
2630         int flags;
2631         int *pstat;
2632         register ENVELOPE *e;
2633 {
2634         register char **pvp;
2635         char *SM_NONVOLATILE fancy;
2636         char *oldg;
2637         int rwset;
2638         static char buf[MAXNAME + 1];
2639         char lbuf[MAXNAME + 1];
2640         char pvpbuf[PSBUFSIZE];
2641         char addrtype[4];
2642
2643         if (tTd(12, 1))
2644         {
2645                 sm_dprintf("remotename(");
2646                 xputs(sm_debug_file(), name);
2647                 sm_dprintf(")\n");
2648         }
2649
2650         /* don't do anything if we are tagging it as special */
2651         if (bitset(RF_SENDERADDR, flags))
2652         {
2653                 rwset = bitset(RF_HEADERADDR, flags) ? m->m_sh_rwset
2654                                                      : m->m_se_rwset;
2655                 addrtype[2] = 's';
2656         }
2657         else
2658         {
2659                 rwset = bitset(RF_HEADERADDR, flags) ? m->m_rh_rwset
2660                                                      : m->m_re_rwset;
2661                 addrtype[2] = 'r';
2662         }
2663         if (rwset < 0)
2664                 return name;
2665         addrtype[1] = ' ';
2666         addrtype[3] = '\0';
2667         addrtype[0] = bitset(RF_HEADERADDR, flags) ? 'h' : 'e';
2668         macdefine(&e->e_macro, A_TEMP, macid("{addr_type}"), addrtype);
2669
2670         /*
2671         **  Do a heuristic crack of this name to extract any comment info.
2672         **      This will leave the name as a comment and a $g macro.
2673         */
2674
2675         if (bitset(RF_CANONICAL, flags) || bitnset(M_NOCOMMENT, m->m_flags))
2676                 fancy = "\201g";
2677         else
2678                 fancy = crackaddr(name, e);
2679
2680         /*
2681         **  Turn the name into canonical form.
2682         **      Normally this will be RFC 822 style, i.e., "user@domain".
2683         **      If this only resolves to "user", and the "C" flag is
2684         **      specified in the sending mailer, then the sender's
2685         **      domain will be appended.
2686         */
2687
2688         pvp = prescan(name, '\0', pvpbuf, sizeof(pvpbuf), NULL, NULL, false);
2689         if (pvp == NULL)
2690                 return name;
2691         if (REWRITE(pvp, 3, e) == EX_TEMPFAIL)
2692                 *pstat = EX_TEMPFAIL;
2693         if (bitset(RF_ADDDOMAIN, flags) && e->e_fromdomain != NULL)
2694         {
2695                 /* append from domain to this address */
2696                 register char **pxp = pvp;
2697                 int l = MAXATOM;        /* size of buffer for pvp */
2698
2699                 /* see if there is an "@domain" in the current name */
2700                 while (*pxp != NULL && strcmp(*pxp, "@") != 0)
2701                 {
2702                         pxp++;
2703                         --l;
2704                 }
2705                 if (*pxp == NULL)
2706                 {
2707                         /* no.... append the "@domain" from the sender */
2708                         register char **qxq = e->e_fromdomain;
2709
2710                         while ((*pxp++ = *qxq++) != NULL)
2711                         {
2712                                 if (--l <= 0)
2713                                 {
2714                                         *--pxp = NULL;
2715                                         usrerr("553 5.1.0 remotename: too many tokens");
2716                                         *pstat = EX_UNAVAILABLE;
2717                                         break;
2718                                 }
2719                         }
2720                         if (REWRITE(pvp, 3, e) == EX_TEMPFAIL)
2721                                 *pstat = EX_TEMPFAIL;
2722                 }
2723         }
2724
2725         /*
2726         **  Do more specific rewriting.
2727         **      Rewrite using ruleset 1 or 2 depending on whether this is
2728         **              a sender address or not.
2729         **      Then run it through any receiving-mailer-specific rulesets.
2730         */
2731
2732         if (bitset(RF_SENDERADDR, flags))
2733         {
2734                 if (REWRITE(pvp, 1, e) == EX_TEMPFAIL)
2735                         *pstat = EX_TEMPFAIL;
2736         }
2737         else
2738         {
2739                 if (REWRITE(pvp, 2, e) == EX_TEMPFAIL)
2740                         *pstat = EX_TEMPFAIL;
2741         }
2742         if (rwset > 0)
2743         {
2744                 if (REWRITE(pvp, rwset, e) == EX_TEMPFAIL)
2745                         *pstat = EX_TEMPFAIL;
2746         }
2747
2748         /*
2749         **  Do any final sanitation the address may require.
2750         **      This will normally be used to turn internal forms
2751         **      (e.g., user@host.LOCAL) into external form.  This
2752         **      may be used as a default to the above rules.
2753         */
2754
2755         if (REWRITE(pvp, 4, e) == EX_TEMPFAIL)
2756                 *pstat = EX_TEMPFAIL;
2757
2758         /*
2759         **  Now restore the comment information we had at the beginning.
2760         */
2761
2762         cataddr(pvp, NULL, lbuf, sizeof(lbuf), '\0', false);
2763         oldg = macget(&e->e_macro, 'g');
2764         macset(&e->e_macro, 'g', lbuf);
2765
2766         SM_TRY
2767                 /* need to make sure route-addrs have <angle brackets> */
2768                 if (bitset(RF_CANONICAL, flags) && lbuf[0] == '@')
2769                         expand("<\201g>", buf, sizeof(buf), e);
2770                 else
2771                         expand(fancy, buf, sizeof(buf), e);
2772         SM_FINALLY
2773                 macset(&e->e_macro, 'g', oldg);
2774         SM_END_TRY
2775
2776         if (tTd(12, 1))
2777         {
2778                 sm_dprintf("remotename => `");
2779                 xputs(sm_debug_file(), buf);
2780                 sm_dprintf("'\n");
2781         }
2782         return buf;
2783 }
2784 /*
2785 **  MAPLOCALUSER -- run local username through ruleset 5 for final redirection
2786 **
2787 **      Parameters:
2788 **              a -- the address to map (but just the user name part).
2789 **              sendq -- the sendq in which to install any replacement
2790 **                      addresses.
2791 **              aliaslevel -- the alias nesting depth.
2792 **              e -- the envelope.
2793 **
2794 **      Returns:
2795 **              none.
2796 */
2797
2798 #define Q_COPYFLAGS     (QPRIMARY|QBOGUSSHELL|QUNSAFEADDR|\
2799                          Q_PINGFLAGS|QHASNOTIFY|\
2800                          QRELAYED|QEXPANDED|QDELIVERED|QDELAYED|\
2801                          QBYTRACE|QBYNDELAY|QBYNRELAY)
2802
2803 void
2804 maplocaluser(a, sendq, aliaslevel, e)
2805         register ADDRESS *a;
2806         ADDRESS **sendq;
2807         int aliaslevel;
2808         ENVELOPE *e;
2809 {
2810         register char **pvp;
2811         register ADDRESS *SM_NONVOLATILE a1 = NULL;
2812         char pvpbuf[PSBUFSIZE];
2813
2814         if (tTd(29, 1))
2815         {
2816                 sm_dprintf("maplocaluser: ");
2817                 printaddr(sm_debug_file(), a, false);
2818         }
2819         pvp = prescan(a->q_user, '\0', pvpbuf, sizeof(pvpbuf), NULL, NULL,
2820                         false);
2821         if (pvp == NULL)
2822         {
2823                 if (tTd(29, 9))
2824                         sm_dprintf("maplocaluser: cannot prescan %s\n",
2825                                 a->q_user);
2826                 return;
2827         }
2828
2829         macdefine(&e->e_macro, A_PERM, 'h', a->q_host);
2830         macdefine(&e->e_macro, A_PERM, 'u', a->q_user);
2831         macdefine(&e->e_macro, A_PERM, 'z', a->q_home);
2832
2833         macdefine(&e->e_macro, A_PERM, macid("{addr_type}"), "e r");
2834         if (REWRITE(pvp, 5, e) == EX_TEMPFAIL)
2835         {
2836                 if (tTd(29, 9))
2837                         sm_dprintf("maplocaluser: rewrite tempfail\n");
2838                 a->q_state = QS_QUEUEUP;
2839                 a->q_status = "4.4.3";
2840                 return;
2841         }
2842         if (pvp[0] == NULL || (pvp[0][0] & 0377) != CANONNET)
2843         {
2844                 if (tTd(29, 9))
2845                         sm_dprintf("maplocaluser: doesn't resolve\n");
2846                 return;
2847         }
2848
2849         SM_TRY
2850                 a1 = buildaddr(pvp, NULL, 0, e);
2851         SM_EXCEPT(exc, "E:mta.quickabort")
2852
2853                 /*
2854                 **  mark address as bad, S5 returned an error
2855                 **      and we gave that back to the SMTP client.
2856                 */
2857
2858                 a->q_state = QS_DONTSEND;
2859                 sm_exc_raisenew_x(&EtypeQuickAbort, 2);
2860         SM_END_TRY
2861
2862         /* if non-null, mailer destination specified -- has it changed? */
2863         if (a1 == NULL || sameaddr(a, a1))
2864         {
2865                 if (tTd(29, 9))
2866                         sm_dprintf("maplocaluser: address unchanged\n");
2867                 return;
2868         }
2869
2870         /* make new address take on flags and print attributes of old */
2871         a1->q_flags &= ~Q_COPYFLAGS;
2872         a1->q_flags |= a->q_flags & Q_COPYFLAGS;
2873         a1->q_paddr = sm_rpool_strdup_x(e->e_rpool, a->q_paddr);
2874         a1->q_finalrcpt = a->q_finalrcpt;
2875         a1->q_orcpt = a->q_orcpt;
2876
2877         /* mark old address as dead; insert new address */
2878         a->q_state = QS_REPLACED;
2879         if (tTd(29, 5))
2880         {
2881                 sm_dprintf("maplocaluser: QS_REPLACED ");
2882                 printaddr(sm_debug_file(), a, false);
2883         }
2884         a1->q_alias = a;
2885         allocaddr(a1, RF_COPYALL, sm_rpool_strdup_x(e->e_rpool, a->q_paddr), e);
2886         (void) recipient(a1, sendq, aliaslevel, e);
2887 }
2888 /*
2889 **  DEQUOTE_INIT -- initialize dequote map
2890 **
2891 **      Parameters:
2892 **              map -- the internal map structure.
2893 **              args -- arguments.
2894 **
2895 **      Returns:
2896 **              true.
2897 */
2898
2899 bool
2900 dequote_init(map, args)
2901         MAP *map;
2902         char *args;
2903 {
2904         register char *p = args;
2905
2906         /* there is no check whether there is really an argument */
2907         map->map_mflags |= MF_KEEPQUOTES;
2908         for (;;)
2909         {
2910                 while (isascii(*p) && isspace(*p))
2911                         p++;
2912                 if (*p != '-')
2913                         break;
2914                 switch (*++p)
2915                 {
2916                   case 'a':
2917                         map->map_app = ++p;
2918                         break;
2919
2920                   case 'D':
2921                         map->map_mflags |= MF_DEFER;
2922                         break;
2923
2924                   case 'S':
2925                   case 's':
2926                         map->map_spacesub = *++p;
2927                         break;
2928                 }
2929                 while (*p != '\0' && !(isascii(*p) && isspace(*p)))
2930                         p++;
2931                 if (*p != '\0')
2932                         *p = '\0';
2933         }
2934         if (map->map_app != NULL)
2935                 map->map_app = newstr(map->map_app);
2936
2937         return true;
2938 }
2939 /*
2940 **  DEQUOTE_MAP -- unquote an address
2941 **
2942 **      Parameters:
2943 **              map -- the internal map structure (ignored).
2944 **              name -- the name to dequote.
2945 **              av -- arguments (ignored).
2946 **              statp -- pointer to status out-parameter.
2947 **
2948 **      Returns:
2949 **              NULL -- if there were no quotes, or if the resulting
2950 **                      unquoted buffer would not be acceptable to prescan.
2951 **              else -- The dequoted buffer.
2952 */
2953
2954 /* ARGSUSED2 */
2955 char *
2956 dequote_map(map, name, av, statp)
2957         MAP *map;
2958         char *name;
2959         char **av;
2960         int *statp;
2961 {
2962         register char *p;
2963         register char *q;
2964         register char c;
2965         int anglecnt = 0;
2966         int cmntcnt = 0;
2967         int quotecnt = 0;
2968         int spacecnt = 0;
2969         bool quotemode = false;
2970         bool bslashmode = false;
2971         char spacesub = map->map_spacesub;
2972
2973         for (p = q = name; (c = *p++) != '\0'; )
2974         {
2975                 if (bslashmode)
2976                 {
2977                         bslashmode = false;
2978                         *q++ = c;
2979                         continue;
2980                 }
2981
2982                 if (c == ' ' && spacesub != '\0')
2983                         c = spacesub;
2984
2985                 switch (c)
2986                 {
2987                   case '\\':
2988                         bslashmode = true;
2989                         break;
2990
2991                   case '(':
2992                         cmntcnt++;
2993                         break;
2994
2995                   case ')':
2996                         if (cmntcnt-- <= 0)
2997                                 return NULL;
2998                         break;
2999
3000                   case ' ':
3001                   case '\t':
3002                         spacecnt++;
3003                         break;
3004                 }
3005
3006                 if (cmntcnt > 0)
3007                 {
3008                         *q++ = c;
3009                         continue;
3010                 }
3011
3012                 switch (c)
3013                 {
3014                   case '"':
3015                         quotemode = !quotemode;
3016                         quotecnt++;
3017                         continue;
3018
3019                   case '<':
3020                         anglecnt++;
3021                         break;
3022
3023                   case '>':
3024                         if (anglecnt-- <= 0)
3025                                 return NULL;
3026                         break;
3027                 }
3028                 *q++ = c;
3029         }
3030
3031         if (anglecnt != 0 || cmntcnt != 0 || bslashmode ||
3032             quotemode || quotecnt <= 0 || spacecnt != 0)
3033                 return NULL;
3034         *q++ = '\0';
3035         return map_rewrite(map, name, strlen(name), NULL);
3036 }
3037 /*
3038 **  RSCHECK -- check string(s) for validity using rewriting sets
3039 **
3040 **      Parameters:
3041 **              rwset -- the rewriting set to use.
3042 **              p1 -- the first string to check.
3043 **              p2 -- the second string to check -- may be null.
3044 **              e -- the current envelope.
3045 **              flags -- control some behavior, see RSF_ in sendmail.h
3046 **              logl -- logging level.
3047 **              host -- NULL or relay host.
3048 **              logid -- id for sm_syslog.
3049 **              addr -- if not NULL and ruleset returns $#error:
3050 **                              store mailer triple here.
3051 **
3052 **      Returns:
3053 **              EX_OK -- if the rwset doesn't resolve to $#error
3054 **              else -- the failure status (message printed)
3055 */
3056
3057 int
3058 rscheck(rwset, p1, p2, e, flags, logl, host, logid, addr)
3059         char *rwset;
3060         char *p1;
3061         char *p2;
3062         ENVELOPE *e;
3063         int flags;
3064         int logl;
3065         char *host;
3066         char *logid;
3067         ADDRESS *addr;
3068 {
3069         char *volatile buf;
3070         size_t bufsize;
3071         int saveexitstat;
3072         int volatile rstat = EX_OK;
3073         char **pvp;
3074         int rsno;
3075         bool volatile discard = false;
3076         bool saveQuickAbort = QuickAbort;
3077         bool saveSuprErrs = SuprErrs;
3078         bool quarantine = false;
3079         char ubuf[BUFSIZ * 2];
3080         char buf0[MAXLINE];
3081         char pvpbuf[PSBUFSIZE];
3082         extern char MsgBuf[];
3083
3084         if (tTd(48, 2))
3085                 sm_dprintf("rscheck(%s, %s, %s)\n", rwset, p1,
3086                         p2 == NULL ? "(NULL)" : p2);
3087
3088         rsno = strtorwset(rwset, NULL, ST_FIND);
3089         if (rsno < 0)
3090                 return EX_OK;
3091
3092         if (p2 != NULL)
3093         {
3094                 bufsize = strlen(p1) + strlen(p2) + 2;
3095                 if (bufsize > sizeof(buf0))
3096                         buf = sm_malloc_x(bufsize);
3097                 else
3098                 {
3099                         buf = buf0;
3100                         bufsize = sizeof(buf0);
3101                 }
3102                 (void) sm_snprintf(buf, bufsize, "%s%c%s", p1, CONDELSE, p2);
3103         }
3104         else
3105         {
3106                 bufsize = strlen(p1) + 1;
3107                 if (bufsize > sizeof(buf0))
3108                         buf = sm_malloc_x(bufsize);
3109                 else
3110                 {
3111                         buf = buf0;
3112                         bufsize = sizeof(buf0);
3113                 }
3114                 (void) sm_strlcpy(buf, p1, bufsize);
3115         }
3116         SM_TRY
3117         {
3118                 SuprErrs = true;
3119                 QuickAbort = false;
3120                 pvp = prescan(buf, '\0', pvpbuf, sizeof(pvpbuf), NULL,
3121                               bitset(RSF_RMCOMM, flags) ?
3122                                         IntTokenTab : TokTypeNoC,
3123                               bitset(RSF_RMCOMM, flags) ? false : true);
3124                 SuprErrs = saveSuprErrs;
3125                 if (pvp == NULL)
3126                 {
3127                         if (tTd(48, 2))
3128                                 sm_dprintf("rscheck: cannot prescan input\n");
3129         /*
3130                         syserr("rscheck: cannot prescan input: \"%s\"",
3131                                 shortenstring(buf, MAXSHORTSTR));
3132                         rstat = EX_DATAERR;
3133         */
3134                         goto finis;
3135                 }
3136                 if (bitset(RSF_UNSTRUCTURED, flags))
3137                         SuprErrs = true;
3138                 (void) REWRITE(pvp, rsno, e);
3139                 if (bitset(RSF_UNSTRUCTURED, flags))
3140                         SuprErrs = saveSuprErrs;
3141                 if (pvp[0] == NULL || (pvp[0][0] & 0377) != CANONNET ||
3142                     pvp[1] == NULL || (strcmp(pvp[1], "error") != 0 &&
3143                                        strcmp(pvp[1], "discard") != 0))
3144                 {
3145                         goto finis;
3146                 }
3147
3148                 if (strcmp(pvp[1], "discard") == 0)
3149                 {
3150                         if (tTd(48, 2))
3151                                 sm_dprintf("rscheck: discard mailer selected\n");
3152                         e->e_flags |= EF_DISCARD;
3153                         discard = true;
3154                 }
3155                 else if (strcmp(pvp[1], "error") == 0 &&
3156                          pvp[2] != NULL && (pvp[2][0] & 0377) == CANONHOST &&
3157                          pvp[3] != NULL && strcmp(pvp[3], "quarantine") == 0)
3158                 {
3159                         if (pvp[4] == NULL ||
3160                             (pvp[4][0] & 0377) != CANONUSER ||
3161                             pvp[5] == NULL)
3162                                 e->e_quarmsg = sm_rpool_strdup_x(e->e_rpool,
3163                                                                  rwset);
3164                         else
3165                         {
3166                                 cataddr(&(pvp[5]), NULL, ubuf,
3167                                         sizeof(ubuf), ' ', true);
3168                                 e->e_quarmsg = sm_rpool_strdup_x(e->e_rpool,
3169                                                                  ubuf);
3170                         }
3171                         macdefine(&e->e_macro, A_PERM,
3172                                   macid("{quarantine}"), e->e_quarmsg);
3173                         quarantine = true;
3174                 }
3175                 else
3176                 {
3177                         auto ADDRESS a1;
3178                         int savelogusrerrs = LogUsrErrs;
3179                         static bool logged = false;
3180
3181                         /* got an error -- process it */
3182                         saveexitstat = ExitStat;
3183                         LogUsrErrs = false;
3184                         (void) buildaddr(pvp, &a1, 0, e);
3185                         if (addr != NULL)
3186                         {
3187                                 addr->q_mailer = a1.q_mailer;
3188                                 addr->q_user = a1.q_user;
3189                                 addr->q_host = a1.q_host;
3190                         }
3191                         LogUsrErrs = savelogusrerrs;
3192                         rstat = ExitStat;
3193                         ExitStat = saveexitstat;
3194                         if (!logged)
3195                         {
3196                                 if (bitset(RSF_COUNT, flags))
3197                                         markstats(e, &a1, STATS_REJECT);
3198                                 logged = true;
3199                         }
3200                 }
3201
3202                 if (LogLevel > logl)
3203                 {
3204                         char *relay;
3205                         char *p;
3206                         char lbuf[MAXLINE];
3207
3208                         p = lbuf;
3209                         if (p2 != NULL)
3210                         {
3211                                 (void) sm_snprintf(p, SPACELEFT(lbuf, p),
3212                                         ", arg2=%s",
3213                                         p2);
3214                                 p += strlen(p);
3215                         }
3216
3217                         if (host != NULL)
3218                                 relay = host;
3219                         else
3220                                 relay = macvalue('_', e);
3221                         if (relay != NULL)
3222                         {
3223                                 (void) sm_snprintf(p, SPACELEFT(lbuf, p),
3224                                         ", relay=%s", relay);
3225                                 p += strlen(p);
3226                         }
3227                         *p = '\0';
3228                         if (discard)
3229                                 sm_syslog(LOG_NOTICE, logid,
3230                                           "ruleset=%s, arg1=%s%s, discard",
3231                                           rwset, p1, lbuf);
3232                         else if (quarantine)
3233                                 sm_syslog(LOG_NOTICE, logid,
3234                                           "ruleset=%s, arg1=%s%s, quarantine=%s",
3235                                           rwset, p1, lbuf, ubuf);
3236                         else
3237                                 sm_syslog(LOG_NOTICE, logid,
3238                                           "ruleset=%s, arg1=%s%s, reject=%s",
3239                                           rwset, p1, lbuf, MsgBuf);
3240                 }
3241
3242          finis: ;
3243         }
3244         SM_FINALLY
3245         {
3246                 /* clean up */
3247                 if (buf != buf0)
3248                         sm_free(buf);
3249                 QuickAbort = saveQuickAbort;
3250         }
3251         SM_END_TRY
3252
3253         setstat(rstat);
3254
3255         /* rulesets don't set errno */
3256         errno = 0;
3257         if (rstat != EX_OK && QuickAbort)
3258                 sm_exc_raisenew_x(&EtypeQuickAbort, 2);
3259         return rstat;
3260 }
3261 /*
3262 **  RSCAP -- call rewriting set to return capabilities
3263 **
3264 **      Parameters:
3265 **              rwset -- the rewriting set to use.
3266 **              p1 -- the first string to check.
3267 **              p2 -- the second string to check -- may be null.
3268 **              e -- the current envelope.
3269 **              pvp -- pointer to token vector.
3270 **              pvpbuf -- buffer space.
3271 **              size -- size of buffer space.
3272 **
3273 **      Returns:
3274 **              EX_UNAVAILABLE -- ruleset doesn't exist.
3275 **              EX_DATAERR -- prescan() failed.
3276 **              EX_OK -- rewrite() was successful.
3277 **              else -- return status from rewrite().
3278 */
3279
3280 int
3281 rscap(rwset, p1, p2, e, pvp, pvpbuf, size)
3282         char *rwset;
3283         char *p1;
3284         char *p2;
3285         ENVELOPE *e;
3286         char ***pvp;
3287         char *pvpbuf;
3288         int size;
3289 {
3290         char *volatile buf;
3291         size_t bufsize;
3292         int volatile rstat = EX_OK;
3293         int rsno;
3294         bool saveQuickAbort = QuickAbort;
3295         bool saveSuprErrs = SuprErrs;
3296         char buf0[MAXLINE];
3297         extern char MsgBuf[];
3298
3299         if (tTd(48, 2))
3300                 sm_dprintf("rscap(%s, %s, %s)\n", rwset, p1,
3301                         p2 == NULL ? "(NULL)" : p2);
3302
3303         SM_REQUIRE(pvp != NULL);
3304         rsno = strtorwset(rwset, NULL, ST_FIND);
3305         if (rsno < 0)
3306                 return EX_UNAVAILABLE;
3307
3308         if (p2 != NULL)
3309         {
3310                 bufsize = strlen(p1) + strlen(p2) + 2;
3311                 if (bufsize > sizeof(buf0))
3312                         buf = sm_malloc_x(bufsize);
3313                 else
3314                 {
3315                         buf = buf0;
3316                         bufsize = sizeof(buf0);
3317                 }
3318                 (void) sm_snprintf(buf, bufsize, "%s%c%s", p1, CONDELSE, p2);
3319         }
3320         else
3321         {
3322                 bufsize = strlen(p1) + 1;
3323                 if (bufsize > sizeof(buf0))
3324                         buf = sm_malloc_x(bufsize);
3325                 else
3326                 {
3327                         buf = buf0;
3328                         bufsize = sizeof(buf0);
3329                 }
3330                 (void) sm_strlcpy(buf, p1, bufsize);
3331         }
3332         SM_TRY
3333         {
3334                 SuprErrs = true;
3335                 QuickAbort = false;
3336                 *pvp = prescan(buf, '\0', pvpbuf, size, NULL, IntTokenTab,
3337                                 false);
3338                 if (*pvp != NULL)
3339                         rstat = rewrite(*pvp, rsno, 0, e, size);
3340                 else
3341                 {
3342                         if (tTd(48, 2))
3343                                 sm_dprintf("rscap: cannot prescan input\n");
3344                         rstat = EX_DATAERR;
3345                 }
3346         }
3347         SM_FINALLY
3348         {
3349                 /* clean up */
3350                 if (buf != buf0)
3351                         sm_free(buf);
3352                 SuprErrs = saveSuprErrs;
3353                 QuickAbort = saveQuickAbort;
3354
3355                 /* prevent information leak, this may contain rewrite error */
3356                 MsgBuf[0] = '\0';
3357         }
3358         SM_END_TRY
3359         return rstat;
3360 }