git.sur5r.net Git - openldap/blob - clients/mail500/main.c

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright (c) 1990 Regents of the University of Michigan.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms are permitted
   7  * provided that this notice is preserved and that due credit is given
   8  * to the University of Michigan at Ann Arbor. The name of the University
   9  * may not be used to endorse or promote products derived from this
  10  * software without specific prior written permission. This software
  11  * is provided ``as is'' without express or implied warranty.
  12  *
  13  * Copyright 1998,1999 The OpenLDAP Foundation
  14  * COPYING RESTRICTIONS APPLY.  See COPYRIGHT File in top level directory
  15  * of this package for details.
  16  */
  17
  18 #include "portable.h"
  19
  20 #include <stdio.h>
  21
  22 #include <ac/stdlib.h>
  23
  24 #include <ac/ctype.h>
  25 #include <ac/param.h>
  26 #include <ac/signal.h>
  27 #include <ac/string.h>
  28 #include <ac/sysexits.h>
  29 #include <ac/syslog.h>
  30 #include <ac/time.h>
  31 #include <ac/unistd.h>
  32 #include <ac/wait.h>
  33
  34 #include <sys/stat.h>
  35
  36 #ifdef HAVE_SYS_RESOURCE_H
  37 #include <sys/resource.h>
  38 #endif
  39
  40 #include <ldap.h>
  41
  42 #include "ldap_defaults.h"
  43
  44 #ifndef MAIL500_BOUNCEFROM
  45 #define MAIL500_BOUNCEFROM "<>"
  46 #endif
  47
  48 #define USER            0x01
  49 #define GROUP_ERRORS    0x02
  50 #define GROUP_REQUEST   0x04
  51 #define GROUP_MEMBERS   0x08
  52 #define GROUP_OWNER     0x10
  53
  54 #define ERROR           "error"
  55 #define ERRORS          "errors"
  56 #define REQUEST         "request"
  57 #define REQUESTS        "requests"
  58 #define MEMBERS         "members"
  59 #define OWNER           "owner"
  60 #define OWNERS          "owners"
  61
  62 LDAP    *ld;
  63 char    *vacationhost = NULL;
  64 char    *errorsfrom = MAIL500_BOUNCEFROM;
  65 char    *mailfrom = NULL;
  66 char    *host = NULL;
  67 char    *ldaphost = NULL;
  68 int     hostlen = 0;
  69 int     debug;
  70
  71 typedef struct errs {
  72         int             e_code;
  73 #define E_USERUNKNOWN           1
  74 #define E_AMBIGUOUS             2
  75 #define E_NOEMAIL               3
  76 #define E_NOREQUEST             4
  77 #define E_NOERRORS              5
  78 #define E_BADMEMBER             6
  79 #define E_JOINMEMBERNOEMAIL     7
  80 #define E_MEMBERNOEMAIL         8
  81 #define E_LOOP                  9
  82 #define E_NOMEMBERS             10
  83 #define E_NOOWNER               11
  84 #define E_GROUPUNKNOWN          12
  85 #define E_NOOWNADDRESS          13
  86         char            *e_addr;
  87         union e_union_u {
  88                 char            *e_u_loop;
  89                 LDAPMessage     *e_u_msg;
  90         } e_union;
  91 #define e_msg   e_union.e_u_msg
  92 #define e_loop  e_union.e_u_loop
  93 } Error;
  94
  95 typedef struct groupto {
  96         char    *g_dn;
  97         char    *g_errorsto;
  98         char    **g_members;
  99         int     g_nmembers;
 100 } Group;
 101
 102 typedef struct baseinfo {
 103         char    *b_url;
 104         int     b_m_entries;
 105         char    b_rdnpref;      /* give rdn's preference when searching? */
 106         int     b_search;       /* ORed with the type of thing the address */
 107                                 /*  looks like (USER, GROUP_ERRORS, etc.)  */
 108                                 /*  to see if this should be searched      */
 109 } Base;
 110
 111 /*
 112  * We should limit the search to objectclass=mailRecipient or
 113  * objectclass=mailGroup.
 114  */
 115
 116 /*
 117 Base    base[] = {
 118         {"dc=StlInter, dc=Net",
 119                 0, 0xff,
 120                 {"mail=%s", "mailAlternateAddress=%s", NULL}},
 121         {NULL}
 122 };
 123 */
 124
 125 Base    **base = NULL;
 126
 127 char    *sendmailargs[] = { MAIL500_SENDMAIL, "-oMrLDAP", "-odi", "-oi", "-f", NULL, NULL };
 128
 129 typedef struct attr_semantics {
 130         char    *as_name;
 131         int     as_m_valued;    /* Is multivalued? */
 132         int     as_priority;    /* Priority level of this attribut type */
 133         int     as_syntax;      /* How to interpret values */
 134         int     as_m_entries;   /* Can resolve to several entries? */
 135         int     as_kind;        /* Recipient, sender, etc. */
 136         char    *as_param;      /* Extra info for filters and things alike */
 137 } AttrSemantics;
 138
 139 #define AS_SYNTAX_UNKNOWN       0
 140 #define AS_SYNTAX_NATIVE_MB     1       /* Unqualified mailbox name */
 141 #define AS_SYNTAX_RFC822        2       /* RFC822 mail address */
 142 #define AS_SYNTAX_HOST          3
 143 #define AS_SYNTAX_DN            4       /* A directory entry */
 144 #define AS_SYNTAX_RFC822_EXT    5
 145 #define AS_SYNTAX_URL           6       /* mailto: or ldap: URL */
 146 #define AS_SYNTAX_BOOL_FILTER   7       /* For joinable, filter in as_param */
 147 #define AS_SYNTAX_PRESENT       8       /* Value irrelevant, only presence is
 148                                          * considered. */
 149
 150 #define AS_KIND_UNKNOWN         0
 151 #define AS_KIND_RECIPIENT       1
 152 #define AS_KIND_ERRORS          2       /* For ErrorsTo and similar */
 153 #define AS_KIND_REQUEST         3
 154 #define AS_KIND_OWNER           4
 155 #define AS_KIND_ROUTE_TO_HOST   5       /* Expand at some other host */
 156 #define AS_KIND_ALLOWED_SENDER  6       /* Can send to group */
 157 #define AS_KIND_MODERATOR       7
 158 #define AS_KIND_ROUTE_TO_ADDR   8       /* Rewrite recipient address as */
 159 #define AS_KIND_OWN_ADDR        9       /* RFC822 name of this entry */
 160
 161 AttrSemantics **attr_semantics = NULL;
 162 int current_priority = 0;
 163
 164 typedef struct subst {
 165         char    sub_char;
 166         char    *sub_value;
 167 } Subst;
 168
 169 char    **groupclasses = NULL;
 170 char    **def_attr = NULL;
 171 char    **mydomains = NULL;             /* FQDNs not to route elsewhere */
 172
 173 static void load_config( char *filespec );
 174 static void split_address( char *address, char **localpart, char **domainpart);
 175 static int entry_engine( LDAPMessage *e, char *dn, char *address, char ***to, int *nto, Group ***togroups, int *ngroups, Error **err, int *nerr, int type );
 176 static void do_address( char *name, char ***to, int *nto, Group ***togroups, int *ngroups, Error **err, int *nerr, int type );
 177 static void send_message( char **to );
 178 static void send_errors( Error *err, int nerr );
 179 static void do_noemail( FILE *fp, Error *err, int namelen );
 180 static void do_ambiguous( FILE *fp, Error *err, int namelen );
 181 static int count_values( char **list );
 182 static void add_to( char ***list, int *nlist, char **new );
 183 static void add_single_to( char ***list, char *new );
 184 static int  isgroup( LDAPMessage *e );
 185 static void add_error( Error **err, int *nerr, int code, char *addr, LDAPMessage *msg );
 186 static void unbind_and_exit( int rc ) LDAP_GCCATTR((noreturn));
 187 static void send_group( Group **group, int ngroup );
 188
 189 static int  connect_to_x500( void );
 190
 191
 192 int
 193 main ( int argc, char **argv )
 194 {
 195         char            *myname;
 196         char            **tolist;
 197         Error           *errlist;
 198         Group           **togroups;
 199         int             numto, ngroups, numerr, nargs;
 200         int             i, j;
 201         char            *conffile = NULL;
 202
 203         if ( (myname = strrchr( argv[0], '/' )) == NULL )
 204                 myname = strdup( argv[0] );
 205         else
 206                 myname = strdup( myname + 1 );
 207
 208 #ifdef SIGPIPE
 209         (void) SIGNAL( SIGPIPE, SIG_IGN );
 210 #endif
 211
 212 #ifdef LOG_MAIL
 213         openlog( myname, OPENLOG_OPTIONS, LOG_MAIL );
 214 #elif LOG_DEBUG
 215         openlog( myname, OPENLOG_OPTIONS );
 216 #endif
 217
 218         while ( (i = getopt( argc, argv, "d:C:f:h:l:m:v:" )) != EOF ) {
 219                 switch( i ) {
 220                 case 'd':       /* turn on debugging */
 221                         debug = atoi( optarg );
 222                         break;
 223
 224                 case 'C':       /* path to configuration file */
 225                         conffile = strdup( optarg );
 226                         break;
 227
 228                 case 'f':       /* who it's from & where errors should go */
 229                         mailfrom = strdup( optarg );
 230                         for ( j = 0; sendmailargs[j] != NULL; j++ ) {
 231                                 if ( strcmp( sendmailargs[j], "-f" ) == 0 ) {
 232                                         sendmailargs[j+1] = mailfrom;
 233                                         break;
 234                                 }
 235                         }
 236                         break;
 237
 238                 case 'h':       /* hostname */
 239                         host = strdup( optarg );
 240                         hostlen = strlen(host);
 241                         break;
 242
 243                 case 'l':       /* ldap host */
 244                         ldaphost = strdup( optarg );
 245                         break;
 246
 247                                 /* mailer-daemon address - who we should */
 248                 case 'm':       /* say errors come from */
 249                         errorsfrom = strdup( optarg );
 250                         break;
 251
 252                 case 'v':       /* vacation host */
 253                         vacationhost = strdup( optarg );
 254                         break;
 255
 256                 default:
 257                         syslog( LOG_ALERT, "unknown option" );
 258                         break;
 259                 }
 260         }
 261
 262         if ( mailfrom == NULL ) {
 263                 syslog( LOG_ALERT, "required argument -f not present" );
 264                 exit( EX_TEMPFAIL );
 265         }
 266         if ( errorsfrom == NULL ) {
 267                 syslog( LOG_ALERT, "required argument -m not present" );
 268                 exit( EX_TEMPFAIL );
 269         }
 270 /*      if ( host == NULL ) { */
 271 /*              syslog( LOG_ALERT, "required argument -h not present" ); */
 272 /*              exit( EX_TEMPFAIL ); */
 273 /*      } */
 274         if ( conffile == NULL ) {
 275                 syslog( LOG_ALERT, "required argument -C not present" );
 276                 exit( EX_TEMPFAIL );
 277         }
 278
 279         load_config( conffile );
 280
 281         if ( connect_to_x500() != 0 )
 282                 exit( EX_TEMPFAIL );
 283
 284         setuid( geteuid() );
 285
 286         if ( debug ) {
 287                 char    buf[1024];
 288                 int     i;
 289
 290                 syslog( LOG_ALERT, "running as %d", geteuid() );
 291                 strcpy( buf, argv[0] );
 292                 for ( i = 1; i < argc; i++ ) {
 293                         strcat( buf, " " );
 294                         strcat( buf, argv[i] );
 295                 }
 296
 297                 syslog( LOG_ALERT, "args: (%s)", buf );
 298         }
 299
 300         tolist = NULL;
 301         numto = 0;
 302         add_to( &tolist, &numto, sendmailargs );
 303         nargs = numto;
 304         ngroups = numerr = 0;
 305         togroups = NULL;
 306         errlist = NULL;
 307         for ( i = optind; i < argc; i++ ) {
 308                 char    *s;
 309                 int     type;
 310                 char    *localpart, *domainpart;
 311                 char    address[1024];
 312
 313 /*  TBC: Make this processing optional */
 314 /*              for ( j = 0; argv[i][j] != '\0'; j++ ) { */
 315 /*                      if ( argv[i][j] == '.' || argv[i][j] == '_' ) */
 316 /*                              argv[i][j] = ' '; */
 317 /*              } */
 318
 319                 type = USER;
 320                 split_address( argv[i], &localpart, &domainpart );
 321                 if ( (s = strrchr( localpart, '-' )) != NULL ) {
 322                         s++;
 323
 324                         if ((strcasecmp(s, ERROR) == 0) ||
 325                                 (strcasecmp(s, ERRORS) == 0)) {
 326                                 type = GROUP_ERRORS;
 327                                 *(--s) = '\0';
 328                         } else if ((strcasecmp(s, REQUEST) == 0) ||
 329                                 (strcasecmp(s, REQUESTS) == 0)) {
 330                                 type = GROUP_REQUEST;
 331                                 *(--s) = '\0';
 332                         } else if ( strcasecmp( s, MEMBERS ) == 0 ) {
 333                                 type = GROUP_MEMBERS;
 334                                 *(--s) = '\0';
 335                         } else if ((strcasecmp(s, OWNER) == 0) ||
 336                                 (strcasecmp(s, OWNERS) == 0)) {
 337                                 type = GROUP_OWNER;
 338                                 *(--s) = '\0';
 339                         }
 340                 }
 341
 342                 if ( domainpart ) {
 343                         sprintf( address, "%s@%s", localpart, domainpart );
 344                         free( localpart );
 345                         free( domainpart );
 346                 } else {
 347                         sprintf( address, "%s@%s", localpart, domainpart );
 348                         free( localpart );
 349                 }
 350                 do_address( address, &tolist, &numto, &togroups, &ngroups,
 351                     &errlist, &numerr, type );
 352         }
 353
 354         /*
 355          * If we have both errors and successful deliveries to make or if
 356          * if there are any groups to deliver to, we basically need to read
 357          * the message twice.  So, we have to put it in a tmp file.
 358          */
 359
 360         if ( numerr > 0 && numto > nargs || ngroups > 0 ) {
 361                 FILE    *fp;
 362                 char    buf[BUFSIZ];
 363
 364                 umask( 077 );
 365                 if ( (fp = tmpfile()) == NULL ) {
 366                         syslog( LOG_ALERT, "could not open tmp file" );
 367                         unbind_and_exit( EX_TEMPFAIL );
 368                 }
 369
 370                 /* copy the message to a temp file */
 371                 while ( fgets( buf, sizeof(buf), stdin ) != NULL ) {
 372                         if ( fputs( buf, fp ) == EOF ) {
 373                                 syslog( LOG_ALERT, "error writing tmpfile" );
 374                                 unbind_and_exit( EX_TEMPFAIL );
 375                         }
 376                 }
 377
 378                 if ( dup2( fileno( fp ), 0 ) == -1 ) {
 379                         syslog( LOG_ALERT, "could not dup2 tmpfile" );
 380                         unbind_and_exit( EX_TEMPFAIL );
 381                 }
 382
 383                 fclose( fp );
 384         }
 385
 386         /* deal with errors */
 387         if ( numerr > 0 ) {
 388                 if ( debug ) {
 389                         syslog( LOG_ALERT, "sending errors" );
 390                 }
 391                 (void) rewind( stdin );
 392                 send_errors( errlist, numerr );
 393         }
 394
 395         (void) ldap_unbind( ld );
 396
 397         /* send to groups with errorsTo */
 398         if ( ngroups > 0 ) {
 399                 if ( debug ) {
 400                         syslog( LOG_ALERT, "sending to groups with errorsto" );
 401                 }
 402                 (void) rewind( stdin );
 403                 send_group( togroups, ngroups );
 404         }
 405
 406         /* send to expanded aliases and groups w/o errorsTo */
 407         if ( numto > nargs ) {
 408                 if ( debug ) {
 409                         syslog( LOG_ALERT, "sending to aliases and groups" );
 410                 }
 411                 (void) rewind( stdin );
 412                 send_message( tolist );
 413         }
 414
 415         return( EX_OK );
 416 }
 417
 418 static char *
 419 get_config_line( FILE *cf, int *lineno)
 420 {
 421         static char     buf[2048];
 422         int             len;
 423         int             pos;
 424         int             room;
 425
 426         pos = 0;
 427         room = sizeof( buf );
 428         while ( fgets( &buf[pos], room, cf ) ) {
 429                 (*lineno)++;
 430                 if ( pos > 0 ) {
 431                         /* Delete whitespace at the beginning of new data */
 432                         if ( isspace( buf[pos] ) ) {
 433                                 char *s, *d;
 434                                 for ( s = buf+pos; isspace(*s); s++ )
 435                                         ;
 436                                 for ( d = buf+pos; *s; s++, d++ ) {
 437                                         *d = *s;
 438                                 }
 439                                 *d = *s;
 440                         }
 441                 }
 442                 len = strlen( buf );
 443                 if ( buf[len-1] != '\n' ) {
 444                         syslog( LOG_ALERT, "Definition too long at line %d",
 445                                 *lineno );
 446                         exit( EX_TEMPFAIL );
 447                 }
 448                 if ( buf[0] == '#' )
 449                         continue;
 450                 if ( strspn( buf, " \t\n" ) == len )
 451                         continue;
 452                 if ( buf[len-2] == '\\' ) {
 453                         pos = len - 2;
 454                         room = sizeof(buf) - pos;
 455                         continue;
 456                 }
 457                 /* We have a real line, we will exit the loop */
 458                 buf[len-1] = '\0';
 459                 return( buf );
 460         }
 461         return( NULL );
 462 }
 463
 464 static void
 465 add_url ( char *url, int rdnpref, int typemask )
 466 {
 467         Base            **list_temp;
 468         int             size;
 469         Base            *b;
 470
 471         b = calloc(1, sizeof(Base));
 472         if ( !b ) {
 473                 syslog( LOG_ALERT, "Out of memory" );
 474                 exit( EX_TEMPFAIL );
 475         }
 476         b->b_url = strdup( url );
 477         b->b_rdnpref = rdnpref;
 478         b->b_search   = typemask;
 479
 480         if ( base == NULL ) {
 481                 base = calloc(2, sizeof(LDAPURLDesc *));
 482                 if ( !base ) {
 483                         syslog( LOG_ALERT, "Out of memory" );
 484                         exit( EX_TEMPFAIL );
 485                 }
 486                 base[0] = b;
 487         } else {
 488                 for ( size = 0; base[size]; size++ )
 489                         ;
 490                 size += 2;
 491                 list_temp = realloc( base, size*sizeof(LDAPURLDesc *) );
 492                 if ( !list_temp ) {
 493                         syslog( LOG_ALERT, "Out of memory" );
 494                         exit( EX_TEMPFAIL );
 495                 }
 496                 base = list_temp;
 497                 base[size-2] = b;
 498                 base[size-1] = NULL;
 499         }
 500 }
 501
 502 static void
 503 add_def_attr( char *s )
 504 {
 505         char *p, *q;
 506
 507         p = s;
 508         while ( *p ) {
 509                 p += strspn( p, "\t," );
 510                 q = strpbrk( p, " \t," );
 511                 if ( q ) {
 512                         *q = '\0';
 513                         add_single_to( &def_attr, p );
 514                 } else {
 515                         add_single_to( &def_attr, p );
 516                         break;
 517                 }
 518                 p = q + 1;
 519         }
 520 }
 521
 522 static void
 523 add_attr_semantics( char *s )
 524 {
 525         char *p, *q;
 526         AttrSemantics *as;
 527
 528         as = calloc( 1, sizeof( AttrSemantics ) );
 529         as->as_priority = current_priority;
 530         p = s;
 531         while ( isspace ( *p ) )
 532                 p++;
 533         q = p;
 534         while ( !isspace ( *q ) && *q != '\0' )
 535                 q++;
 536         *q = '\0';
 537         as->as_name = strdup( p );
 538         p = q + 1;
 539
 540         while ( *p ) {
 541                 while ( isspace ( *p ) )
 542                         p++;
 543                 q = p;
 544                 while ( !isspace ( *q ) && *q != '\0' )
 545                         q++;
 546                 *q = '\0';
 547                 if ( !strcasecmp( p, "multivalued" ) ) {
 548                         as->as_m_valued = 1;
 549                 } else if ( !strcasecmp( p, "multiple-entries" ) ) {
 550                         as->as_m_entries = 1;
 551                 } else if ( !strcasecmp( p, "local-native-mailbox" ) ) {
 552                         as->as_syntax = AS_SYNTAX_NATIVE_MB;
 553                 } else if ( !strcasecmp( p, "rfc822" ) ) {
 554                         as->as_syntax = AS_SYNTAX_RFC822;
 555                 } else if ( !strcasecmp( p, "rfc822-extended" ) ) {
 556                         as->as_syntax = AS_SYNTAX_RFC822_EXT;
 557                 } else if ( !strcasecmp( p, "dn" ) ) {
 558                         as->as_syntax = AS_SYNTAX_DN;
 559                 } else if ( !strcasecmp( p, "url" ) ) {
 560                         as->as_syntax = AS_SYNTAX_URL;
 561                 } else if ( !strncasecmp( p, "search-with-filter=", 19 ) ) {
 562                         as->as_syntax = AS_SYNTAX_BOOL_FILTER;
 563                         q = strchr( p, '=' );
 564                         if ( q ) {
 565                                 p = q + 1;
 566                                 while ( *q && !isspace( *q ) ) {
 567                                         q++;
 568                                 }
 569                                 if ( *q ) {
 570                                         *q = '\0';
 571                                         as->as_param = strdup( p );
 572                                         p = q + 1;
 573                                 } else {
 574                                         as->as_param = strdup( p );
 575                                         p = q;
 576                                 }
 577                         } else {
 578                                 syslog( LOG_ALERT,
 579                                         "Missing filter in %s", s );
 580                                 exit( EX_TEMPFAIL );
 581                         }
 582                 } else if ( !strcasecmp( p, "host" ) ) {
 583                         as->as_kind = AS_SYNTAX_HOST;
 584                 } else if ( !strcasecmp( p, "present" ) ) {
 585                         as->as_kind = AS_SYNTAX_PRESENT;
 586                 } else if ( !strcasecmp( p, "route-to-host" ) ) {
 587                         as->as_kind = AS_KIND_ROUTE_TO_HOST;
 588                 } else if ( !strcasecmp( p, "route-to-address" ) ) {
 589                         as->as_kind = AS_KIND_ROUTE_TO_ADDR;
 590                 } else if ( !strcasecmp( p, "own-address" ) ) {
 591                         as->as_kind = AS_KIND_OWN_ADDR;
 592                 } else if ( !strcasecmp( p, "recipient" ) ) {
 593                         as->as_kind = AS_KIND_RECIPIENT;
 594                 } else if ( !strcasecmp( p, "errors" ) ) {
 595                         as->as_kind = AS_KIND_ERRORS;
 596                 } else if ( !strcasecmp( p, "request" ) ) {
 597                         as->as_kind = AS_KIND_REQUEST;
 598                 } else if ( !strcasecmp( p, "owner" ) ) {
 599                         as->as_kind = AS_KIND_OWNER;
 600                 } else {
 601                         syslog( LOG_ALERT,
 602                                 "Unknown semantics word %s", p );
 603                         exit( EX_TEMPFAIL );
 604                 }
 605                 p = q + 1;
 606         }
 607         if ( attr_semantics == NULL ) {
 608                 attr_semantics = calloc(2, sizeof(AttrSemantics *));
 609                 if ( !attr_semantics ) {
 610                         syslog( LOG_ALERT, "Out of memory" );
 611                         exit( EX_TEMPFAIL );
 612                 }
 613                 attr_semantics[0] = as;
 614         } else {
 615                 int size;
 616                 AttrSemantics **list_temp;
 617                 for ( size = 0; attr_semantics[size]; size++ )
 618                         ;
 619                 size += 2;
 620                 list_temp = realloc( attr_semantics,
 621                                      size*sizeof(AttrSemantics *) );
 622                 if ( !list_temp ) {
 623                         syslog( LOG_ALERT, "Out of memory" );
 624                         exit( EX_TEMPFAIL );
 625                 }
 626                 attr_semantics = list_temp;
 627                 attr_semantics[size-2] = as;
 628                 attr_semantics[size-1] = NULL;
 629         }
 630 }
 631
 632 static void
 633 load_config( char *filespec )
 634 {
 635         FILE            *cf;
 636         char            *line;
 637         int             lineno = 0;
 638         char            *p;
 639         int             rdnpref;
 640         int             typemask;
 641
 642         cf = fopen( filespec, "r" );
 643         if ( !cf ) {
 644                 perror( "Opening config file" );
 645                 exit( EX_TEMPFAIL );
 646         }
 647
 648         while ( ( line = get_config_line( cf,&lineno ) ) ) {
 649                 p = strpbrk( line, " \t" );
 650                 if ( !p ) {
 651                         syslog( LOG_ALERT,
 652                                 "Missing space at line %d", lineno );
 653                         exit( EX_TEMPFAIL );
 654                 }
 655                 if ( !strncmp( line, "search", p-line ) ) {
 656                         p += strspn( p, " \t" );
 657                         /* TBC, get these */
 658                         rdnpref = 0;
 659                         typemask = 0xFF;
 660                         add_url( p, rdnpref, typemask );
 661                 } else if ( !strncmp(line, "attribute", p-line) ) {
 662                         p += strspn(p, " \t");
 663                         add_attr_semantics( p );
 664                 } else if ( !strncmp(line, "default-attributes", p-line) ) {
 665                         p += strspn(p, " \t");
 666                         add_def_attr( p );
 667                 } else if ( !strncmp(line, "group-classes", p-line) ) {
 668                         p += strspn(p, " \t");
 669                         add_single_to( &groupclasses, p );
 670                 } else if ( !strncmp(line, "priority", p-line) ) {
 671                         p += strspn(p, " \t");
 672                         current_priority = atoi(p);
 673                 } else if ( !strncmp(line, "domain", p-line) ) {
 674                         p += strspn(p, " \t");
 675                         add_single_to( &mydomains, p );
 676                 } else {
 677                         syslog( LOG_ALERT,
 678                                 "Unparseable config definition at line %d",
 679                                 lineno );
 680                         exit( EX_TEMPFAIL );
 681                 }
 682         }
 683         fclose( cf );
 684 }
 685
 686 static int
 687 connect_to_x500( void )
 688 {
 689         int opt;
 690
 691         if ( (ld = ldap_init( ldaphost, 0 )) == NULL ) {
 692                 syslog( LOG_ALERT, "ldap_init failed" );
 693                 return( -1 );
 694         }
 695
 696         /*  TBC: Set this only when it makes sense
 697         opt = MAIL500_MAXAMBIGUOUS;
 698         ldap_set_option(ld, LDAP_OPT_SIZELIMIT, &opt);
 699         */
 700         opt = LDAP_DEREF_ALWAYS;
 701         ldap_set_option(ld, LDAP_OPT_DEREF, &opt);
 702
 703         if ( ldap_simple_bind_s( ld, NULL, NULL ) != LDAP_SUCCESS ) {
 704                 syslog( LOG_ALERT, "ldap_simple_bind_s failed" );
 705                 return( -1 );
 706         }
 707
 708         return( 0 );
 709 }
 710
 711 static Group *
 712 new_group( char *dn, Group ***list, int *nlist )
 713 {
 714         int     i;
 715         Group   *this_group;
 716
 717         for ( i = 0; i < *nlist; i++ ) {
 718                 if ( strcmp( dn, (*list)[i]->g_dn ) == 0 ) {
 719                         syslog( LOG_ALERT, "group loop 2 detected (%s)", dn );
 720                         return NULL;
 721                 }
 722         }
 723
 724         this_group = (Group *) malloc( sizeof(Group) );
 725
 726         if ( *nlist == 0 ) {
 727                 *list = (Group **) malloc( sizeof(Group *) );
 728         } else {
 729                 *list = (Group **) realloc( *list, (*nlist + 1) *
 730                     sizeof(Group *) );
 731         }
 732
 733         this_group->g_errorsto = NULL;
 734         this_group->g_members = NULL;
 735         this_group->g_nmembers = 0;
 736         /* save the group's dn so we can check for loops above */
 737         this_group->g_dn = strdup( dn );
 738
 739         (*list)[*nlist] = this_group;
 740         (*nlist)++;
 741
 742         return( this_group );
 743 }
 744
 745 static void
 746 split_address(
 747         char    *address,
 748         char    **localpart,
 749         char    **domainpart
 750 )
 751 {
 752         char            *p;
 753
 754         if ( ( p = strrchr( address, '@' ) ) == NULL ) {
 755                 *localpart = strdup( address );
 756                 *domainpart = NULL;
 757         } else {
 758                 *localpart = malloc( p - address + 1 );
 759                 strncpy( *localpart, address, p - address );
 760                 (*localpart)[p - address] = '\0';
 761                 p++;
 762                 *domainpart = strdup( p );
 763         }
 764 }
 765
 766 static int
 767 dn_search(
 768         char    **dnlist,
 769         char    *address,
 770         char    ***to,
 771         int     *nto,
 772         Group   ***togroups,
 773         int     *ngroups,
 774         Error   **err,
 775         int     *nerr
 776 )
 777 {
 778         int             rc;
 779         int             i;
 780         int             resolved = 0;
 781         LDAPMessage     *res, *e;
 782         struct timeval  timeout;
 783
 784         timeout.tv_sec = MAIL500_TIMEOUT;
 785         timeout.tv_usec = 0;
 786         for ( i = 0; dnlist[i]; i++ ) {
 787                 if ( (rc = ldap_search_st( ld, dnlist[i], LDAP_SCOPE_BASE,
 788                         "(objectclass=*)", def_attr, 0,
 789                          &timeout, &res )) != LDAP_SUCCESS ) {
 790                         if ( rc == LDAP_NO_SUCH_OBJECT ) {
 791                                 add_error( err, nerr, E_BADMEMBER, dnlist[i], NULL );
 792                                 continue;
 793                         } else {
 794                                 syslog( LOG_ALERT, "member search return 0x%x", rc );
 795
 796                                 unbind_and_exit( EX_TEMPFAIL );
 797                         }
 798                 } else {
 799                         if ( (e = ldap_first_entry( ld, res )) == NULL ) {
 800                                 syslog( LOG_ALERT, "member search error parsing entry" );
 801                                 unbind_and_exit( EX_TEMPFAIL );
 802                         }
 803                         if ( entry_engine( e, dnlist[i], address, to, nto,
 804                                            togroups, ngroups, err, nerr,
 805                                            USER | GROUP_MEMBERS ) ) {
 806                                 resolved = 1;
 807                         }
 808                 }
 809         }
 810         return( resolved );
 811 }
 812
 813 static int
 814 search_ldap_url(
 815         char    *url,
 816         Subst   *substs,
 817         char    *address,
 818         int     rdnpref,
 819         int     multi_entry,
 820         char    ***to,
 821         int     *nto,
 822         Group   ***togroups,
 823         int     *ngroups,
 824         Error   **err,
 825         int     *nerr,
 826         int     type
 827 )
 828 {
 829         LDAPURLDesc     *ludp;
 830         char            *p, *s, *d;
 831         int             i;
 832         char            filter[1024];
 833         LDAPMessage     *e, *res;
 834         int             rc;
 835         char            **attrlist;
 836         struct timeval  timeout;
 837         int             match;
 838         int             resolved = 0;
 839         char            *dn;
 840
 841         timeout.tv_sec = MAIL500_TIMEOUT;
 842         timeout.tv_usec = 0;
 843
 844         rc = ldap_url_parse( url, &ludp );
 845         if ( rc ) {
 846                 switch ( rc ) {
 847                 case LDAP_URL_ERR_NOTLDAP:
 848                         syslog( LOG_ALERT,
 849                                 "Not an LDAP URL: %s", url );
 850                         break;
 851                 case LDAP_URL_ERR_BADENCLOSURE:
 852                         syslog( LOG_ALERT,
 853                                 "Bad Enclosure in URL: %s", url );
 854                         break;
 855                 case LDAP_URL_ERR_BADURL:
 856                         syslog( LOG_ALERT,
 857                                 "Bad URL: %s", url );
 858                         break;
 859                 case LDAP_URL_ERR_BADHOST:
 860                         syslog( LOG_ALERT,
 861                                 "Host is invalid in URL: %s", url );
 862                         break;
 863                 case LDAP_URL_ERR_BADATTRS:
 864                         syslog( LOG_ALERT,
 865                                 "Attributes are invalid in URL: %s", url );
 866                         break;
 867                 case LDAP_URL_ERR_BADSCOPE:
 868                         syslog( LOG_ALERT,
 869                                 "Scope is invalid in URL: %s", url );
 870                         break;
 871                 case LDAP_URL_ERR_BADFILTER:
 872                         syslog( LOG_ALERT,
 873                                 "Filter is invalid in URL: %s", url );
 874                         break;
 875                 case LDAP_URL_ERR_BADEXTS:
 876                         syslog( LOG_ALERT,
 877                                 "Extensions are invalid in URL: %s", url );
 878                         break;
 879                 case LDAP_URL_ERR_MEM:
 880                         syslog( LOG_ALERT,
 881                                 "Out of memory parsing URL: %s", url );
 882                         break;
 883                 case LDAP_URL_ERR_PARAM:
 884                         syslog( LOG_ALERT,
 885                                 "bad parameter parsing URL: %s", url );
 886                         break;
 887                 default:
 888                         syslog( LOG_ALERT,
 889                                 "Unknown error %d parsing URL: %s",
 890                                 rc, url );
 891                         break;
 892                 }
 893                 add_error( err, nerr, E_BADMEMBER,
 894                            url, NULL );
 895                 return 0;
 896         }
 897
 898         if ( substs ) {
 899                 for ( s = ludp->lud_filter, d = filter; *s; s++,d++ ) {
 900                         if ( *s == '%' ) {
 901                                 s++;
 902                                 if ( *s == '%' ) {
 903                                         *d = '%';
 904                                         continue;
 905                                 }
 906                                 for ( i = 0; substs[i].sub_char != '\0';
 907                                       i++ ) {
 908                                         if ( *s == substs[i].sub_char ) {
 909                                                 for ( p = substs[i].sub_value;
 910                                                       *p; p++,d++ ) {
 911                                                         *d = *p;
 912                                                 }
 913                                                 d--;
 914                                                 break;
 915                                         }
 916                                 }
 917                                 if ( substs[i].sub_char == '\0' ) {
 918                                         syslog( LOG_ALERT,
 919                                                 "unknown format %c", *s );
 920                                 }
 921                         } else {
 922                                 *d = *s;
 923                         }
 924                 }
 925                 *d = *s;
 926         } else {
 927                 strncpy( filter, ludp->lud_filter, sizeof( filter ) - 1 );
 928                 filter[ sizeof( filter ) - 1 ] = '\0';
 929         }
 930
 931         if ( ludp->lud_attrs ) {
 932                 attrlist = ludp->lud_attrs;
 933         } else {
 934                 attrlist = def_attr;
 935         }
 936         res = NULL;
 937         /* TBC: we don't read the host, dammit */
 938         rc = ldap_search_st( ld, ludp->lud_dn, ludp->lud_scope,
 939                              filter, attrlist, 0,
 940                              &timeout, &res );
 941
 942         /* some other trouble - try again later */
 943         if ( rc != LDAP_SUCCESS &&
 944              rc != LDAP_SIZELIMIT_EXCEEDED ) {
 945                 syslog( LOG_ALERT, "return 0x%x from X.500",
 946                         rc );
 947                 unbind_and_exit( EX_TEMPFAIL );
 948         }
 949
 950         match = ldap_count_entries( ld, res );
 951
 952         /* trouble - try again later */
 953         if ( match == -1 ) {
 954                 syslog( LOG_ALERT, "error parsing result from X.500" );
 955                 unbind_and_exit( EX_TEMPFAIL );
 956         }
 957
 958         if ( match == 1 || multi_entry ) {
 959                 for ( e = ldap_first_entry( ld, res ); e != NULL;
 960                       e = ldap_next_entry( ld, e ) ) {
 961                         dn = ldap_get_dn( ld, e );
 962                         resolved = entry_engine( e, dn, address, to, nto,
 963                                                  togroups, ngroups,
 964                                                  err, nerr, type );
 965                         if ( !resolved ) {
 966                                 add_error( err, nerr, E_NOEMAIL, address, res );
 967                         }
 968                 }
 969                 return ( resolved );
 970         }
 971
 972         /* more than one match - bounce with ambiguous user? */
 973         if ( match > 1 ) {
 974                 LDAPMessage     *next, *tmpres = NULL;
 975                 char            *dn;
 976                 char            **xdn;
 977
 978                 /* not giving rdn preference - bounce with ambiguous user */
 979                 if ( rdnpref == 0 ) {
 980                         add_error( err, nerr, E_AMBIGUOUS, address, res );
 981                         return 0;
 982                 }
 983
 984                 /*
 985                  * giving rdn preference - see if any entries were matched
 986                  * because of their rdn.  If so, collect them to deal with
 987                  * later (== 1 we deliver, > 1 we bounce).
 988                  */
 989
 990                 for ( e = ldap_first_entry( ld, res ); e != NULL; e = next ) {
 991                         next = ldap_next_entry( ld, e );
 992                         dn = ldap_get_dn( ld, e );
 993                         xdn = ldap_explode_dn( dn, 1 );
 994
 995                         /* XXX bad, but how else can we do it? XXX */
 996                         if ( strcasecmp( xdn[0], address ) == 0 ) {
 997                                 ldap_delete_result_entry( &res, e );
 998                                 ldap_add_result_entry( &tmpres, e );
 999                         }
1000
1001                         ldap_value_free( xdn );
1002                         free( dn );
1003                 }
1004
1005                 /* nothing matched by rdn - go ahead and bounce */
1006                 if ( tmpres == NULL ) {
1007                         add_error( err, nerr, E_AMBIGUOUS, address, res );
1008                         return 0;
1009
1010                 /* more than one matched by rdn - bounce with rdn matches */
1011                 } else if ( (match = ldap_count_entries( ld, tmpres )) > 1 ) {
1012                         add_error( err, nerr, E_AMBIGUOUS, address, tmpres );
1013                         return 0;
1014
1015                 /* trouble... */
1016                 } else if ( match < 0 ) {
1017                         syslog( LOG_ALERT, "error parsing result from X.500" );
1018                         unbind_and_exit( EX_TEMPFAIL );
1019                 }
1020
1021                 /* otherwise one matched by rdn - send to it */
1022                 ldap_msgfree( res );
1023                 res = tmpres;
1024
1025                 /* trouble */
1026                 if ( (e = ldap_first_entry( ld, res )) == NULL ) {
1027                         syslog( LOG_ALERT, "error parsing entry from X.500" );
1028                         unbind_and_exit( EX_TEMPFAIL );
1029                 }
1030
1031                 dn = ldap_get_dn( ld, e );
1032
1033                 resolved = entry_engine( e, dn, address, to, nto,
1034                                          togroups, ngroups,
1035                                          err, nerr, type );
1036                 if ( !resolved ) {
1037                         add_error( err, nerr, E_NOEMAIL, address, res );
1038                         /* Don't free res if we passed it to add_error */
1039                 } else {
1040                         ldap_msgfree( res );
1041                 }
1042         }
1043         return( resolved );
1044 }
1045
1046 static int
1047 url_list_search(
1048         char    **urllist,
1049         char    *address,
1050         int     multi_entry,
1051         char    ***to,
1052         int     *nto,
1053         Group   ***togroups,
1054         int     *ngroups,
1055         Error   **err,
1056         int     *nerr,
1057         int     type
1058 )
1059 {
1060         int             i;
1061         int             resolved = 0;
1062
1063         for ( i = 0; urllist[i]; i++ ) {
1064
1065                 if ( !strncasecmp( urllist[i], "mail:", 5 ) ) {
1066                         char    *vals[2];
1067
1068                         vals[0] = urllist[i] + 5;
1069                         vals[1] = NULL;
1070                         add_to( to, nto, vals );
1071                         resolved = 1;
1072
1073                 } else if ( ldap_is_ldap_url( urllist[i] ) ) {
1074
1075                         resolved = search_ldap_url( urllist[i], NULL,
1076                                                     address, 0, multi_entry,
1077                                                     to, nto, togroups, ngroups,
1078                                                     err, nerr, type );
1079                 } else {
1080                         /* Produce some sensible error here */
1081                         resolved = 0;
1082                 }
1083         }
1084         return( resolved );
1085 }
1086
1087 /*
1088  * We should probably take MX records into account to cover all bases,
1089  * but really, routing belongs in the MTA.
1090  */
1091 static int
1092 is_my_domain(
1093         char * domain
1094 )
1095 {
1096         char **d;
1097
1098         if ( d == NULL )
1099                 return 0;
1100         for ( d = mydomains; *d; d++ ) {
1101                 if ( !strcasecmp(*d,domain) ) {
1102                         return 1;
1103                 }
1104         }
1105         return 0;
1106 }
1107
1108 /*
1109  * The entry engine processes an entry.  Normally, each entry will resolve
1110  * to one or more values that will be added to the 'to' argument.  This
1111  * argument needs not be the global 'to' list, it may be the g_to field
1112  * in a group.  Groups have no special treatment, unless they require
1113  * a special sender.
1114  */
1115
1116 static int
1117 entry_engine(
1118         LDAPMessage *e,
1119         char    *dn,
1120         char    *address,
1121         char    ***to,
1122         int     *nto,
1123         Group   ***togroups,
1124         int     *ngroups,
1125         Error   **err,
1126         int     *nerr,
1127         int     type
1128 )
1129 {
1130         char    **vals;
1131         int     i;
1132         int     resolved = 0;
1133         char    ***current_to = to;
1134         int     *current_nto = nto;
1135         Group   *current_group = NULL;
1136         char    buf[1024];
1137         char    *localpart, *domainpart;
1138         Subst   substs[2];
1139         int     cur_priority = 0;
1140         char    *route_to_host = NULL;
1141         char    *route_to_address = NULL;
1142         int     needs_mta_routing = 0;
1143         char    **own_addresses = NULL;
1144         int     own_addresses_total = 0;
1145         char    *nvals[2];
1146
1147         for ( i=0; attr_semantics[i] != NULL; i++ ) {
1148                 AttrSemantics   *as = attr_semantics[i];
1149                 int             nent;
1150                 int             j;
1151
1152                 if ( as->as_priority < cur_priority ) {
1153                         /*
1154                          * We already got higher priority information,
1155                          * so no further work to do, ignore the rest.
1156                          */
1157                         break;
1158                 }
1159                 vals = ldap_get_values( ld, e, as->as_name );
1160                 if ( !vals || vals[0] == NULL ) {
1161                         continue;
1162                 }
1163                 nent = count_values( vals );
1164                 if ( nent > 1 && !as->as_m_valued ) {
1165                         add_error( err, nerr, E_AMBIGUOUS, address, e );
1166                         return( 0 );
1167                 }
1168                 switch ( as->as_kind ) {
1169                 case AS_KIND_RECIPIENT:
1170                         cur_priority = as->as_priority;
1171                         if ( ! ( type & ( USER | GROUP_MEMBERS ) ) )
1172                                 break;
1173                         switch ( as->as_syntax ) {
1174                         case AS_SYNTAX_RFC822:
1175                                 add_to( current_to, current_nto, vals );
1176                                 resolved = 1;
1177                                 break;
1178                         case AS_SYNTAX_RFC822_EXT:
1179                                 add_to( current_to, current_nto, vals );
1180                                 resolved = 1;
1181                                 break;
1182                         case AS_SYNTAX_NATIVE_MB:
1183                                 /* We used to concatenate mailHost if set here */
1184                                 /*
1185                                  * We used to send a copy to the vacation host
1186                                  * if onVacation to uid@vacationhost
1187                                  */
1188                                 add_to( current_to, current_nto, vals );
1189                                 resolved = 1;
1190                                 break;
1191
1192                         case AS_SYNTAX_DN:
1193                                 if ( dn_search( vals, address,
1194                                                 current_to, current_nto,
1195                                                 togroups, ngroups,
1196                                                 err, nerr ) ) {
1197                                         resolved = 1;
1198                                 }
1199                                 break;
1200
1201                         case AS_SYNTAX_URL:
1202                                 if ( url_list_search( vals, address,
1203                                                  as->as_m_entries,
1204                                                  current_to, current_nto,
1205                                                  togroups, ngroups,
1206                                                  err, nerr, type ) ) {
1207                                         resolved = 1;
1208                                 }
1209                                 break;
1210
1211                         case AS_SYNTAX_BOOL_FILTER:
1212                                 if ( strcasecmp( vals[0], "true" ) ) {
1213                                         break;
1214                                 }
1215                                 substs[0].sub_char = 'D';
1216                                 substs[0].sub_value = dn;
1217                                 substs[1].sub_char = '\0';
1218                                 substs[1].sub_value = NULL;
1219                                 if ( url_list_search( vals, address,
1220                                                  as->as_m_entries,
1221                                                  current_to, current_nto,
1222                                                  togroups, ngroups,
1223                                                  err, nerr, type ) ) {
1224                                         resolved = 1;
1225                                 }
1226                                 break;
1227
1228                         default:
1229                                 syslog( LOG_ALERT,
1230                                         "Invalid syntax %d for kind %d",
1231                                         as->as_syntax, as->as_kind );
1232                                 break;
1233                         }
1234                         break;
1235
1236                 case AS_KIND_ERRORS:
1237                         cur_priority = as->as_priority;
1238                         /* This is a group with special processing */
1239                         if ( type & GROUP_ERRORS ) {
1240                                 switch (as->as_kind) {
1241                                 case AS_SYNTAX_RFC822:
1242                                         add_to( current_to, current_nto, vals );
1243                                         resolved = 1;
1244                                         break;
1245                                 case AS_SYNTAX_URL:
1246                                 default:
1247                                         syslog( LOG_ALERT,
1248                                                 "Invalid syntax %d for kind %d",
1249                                                 as->as_syntax, as->as_kind );
1250                                 }
1251                         } else {
1252                                 current_group = new_group( dn, togroups,
1253                                                            ngroups );
1254                                 current_to = &current_group->g_members;
1255                                 current_nto = &current_group->g_nmembers;
1256                                 split_address( address,
1257                                                &localpart, &domainpart );
1258                                 if ( domainpart ) {
1259                                         sprintf( buf, "%s-%s@%s",
1260                                                  localpart, ERRORS,
1261                                                  domainpart );
1262                                         free( localpart );
1263                                         free( domainpart );
1264                                 } else {
1265                                         sprintf( buf, "%s-%s@%s",
1266                                                  localpart, ERRORS,
1267                                                  host );
1268                                         free( localpart );
1269                                 }
1270                                 current_group->g_errorsto = strdup( buf );
1271                         }
1272                         break;
1273
1274                 case AS_KIND_REQUEST:
1275                         cur_priority = as->as_priority;
1276                         /* This is a group with special processing */
1277                         if ( type & GROUP_REQUEST ) {
1278                                 add_to( current_to, current_nto, vals );
1279                                 resolved = 1;
1280                         }
1281                         break;
1282
1283                 case AS_KIND_OWNER:
1284                         cur_priority = as->as_priority;
1285                         /* This is a group with special processing */
1286                         if ( type & GROUP_REQUEST ) {
1287                                 add_to( current_to, current_nto, vals );
1288                                 resolved = 1;
1289                         }
1290                         break;
1291
1292                 case AS_KIND_ROUTE_TO_HOST:
1293                         if ( !is_my_domain( vals[0] ) ) {
1294                                 cur_priority = as->as_priority;
1295                                 if ( as->as_syntax == AS_SYNTAX_PRESENT ) {
1296                                         needs_mta_routing = 1;
1297                                 } else {
1298                                         route_to_host = strdup( vals[0] );
1299                                 }
1300                         }
1301                         break;
1302
1303                 case AS_KIND_ROUTE_TO_ADDR:
1304                         for ( j=0; j<own_addresses_total; j++ ) {
1305                                 if ( strcasecmp( vals[0], own_addresses[j] ) ) {
1306                                         cur_priority = as->as_priority;
1307                                         if ( as->as_syntax == AS_SYNTAX_PRESENT ) {
1308                                                 needs_mta_routing = 1;
1309                                         } else {
1310                                                 route_to_address = strdup( vals[0] );
1311                                         }
1312                                 }
1313                                 break;
1314                         }
1315
1316                 case AS_KIND_OWN_ADDR:
1317                         add_to( &own_addresses, &own_addresses_total, vals );
1318                         cur_priority = as->as_priority;
1319                         break;
1320
1321                 default:
1322                         syslog( LOG_ALERT,
1323                                 "Invalid kind %d", as->as_kind );
1324                         /* Error, TBC */
1325                 }
1326                 ldap_value_free( vals );
1327         }
1328         /*
1329          * Now check if we are dealing with mail routing.  We support
1330          * two modes.
1331          *
1332          * The first mode and by far the most robust method is doing
1333          * routing at the MTA.  In this case, we just checked if the
1334          * routing attributes were present and did not seem like
1335          * pointing to ourselves.  The only thing we have to do here
1336          * is adding to the recipient list any of the RFC822 addresses
1337          * of this entry.  That means we needed to retrieve them from
1338          * the entry itself because we might have arrived here through
1339          * some directory search.  The address received as argument is
1340          * not the address of the entry we are processing, but rather
1341          * the RFC822 address we are expanding now.  Unfortunately,
1342          * this requires an MTA that understands LDAP routing.
1343          * Sendmail 8.10.0 does, if compiled properly.
1344          *
1345          * The second method, that is most emphatically not recommended
1346          * is routing in mail500.  This is going to require using the
1347          * percent hack.  Moreover, this may occasionally loop.
1348          */
1349         if ( needs_mta_routing ) {
1350                 if ( !own_addresses ) {
1351                         add_error( err, nerr, E_NOOWNADDRESS, address, e );
1352                         return( 0 );
1353                 }
1354                 nvals[0] = own_addresses[0];    /* Anyone will do */
1355                 nvals[1] = NULL;
1356                 add_to( current_to, current_nto, nvals );
1357                 resolved = 1;
1358         } else if ( route_to_host ) {
1359                 char *p;
1360                 if ( !route_to_address ) {
1361                         if ( !own_addresses ) {
1362                                 add_error( err, nerr, E_NOOWNADDRESS, address, e );
1363                                 return( 0 );
1364                         }
1365                         route_to_address = strdup( own_addresses[0] );
1366                 }
1367                 /* This makes use of the percent hack, but there's no choice */
1368                 p = strchr( route_to_address, '@' );
1369                 if ( p ) {
1370                         *p = '%';
1371                 }
1372                 sprintf( buf, "%s@%s", route_to_address, route_to_host );
1373                 nvals[0] = buf;
1374                 nvals[1] = NULL;
1375                 add_to( current_to, current_nto, nvals );
1376                 resolved = 1;
1377                 free( route_to_host );
1378                 free( route_to_address );
1379         } else if ( route_to_address ) {
1380                 nvals[0] = route_to_address;
1381                 nvals[1] = NULL;
1382                 add_to( current_to, current_nto, nvals );
1383                 resolved = 1;
1384                 free( route_to_address );
1385         }
1386         if ( own_addresses ) {
1387                 ldap_value_free( own_addresses );
1388         }
1389
1390         return( resolved );
1391 }
1392
1393 static int
1394 search_bases(
1395         char    *filter,
1396         Subst   *substs,
1397         char    *name,
1398         char    ***to,
1399         int     *nto,
1400         Group   ***togroups,
1401         int     *ngroups,
1402         Error   **err,
1403         int     *nerr,
1404         int     type
1405 )
1406 {
1407         int             b, resolved = 0;
1408
1409         for ( b = 0; base[b] != NULL; b++ ) {
1410
1411                 if ( ! (base[b]->b_search & type) ) {
1412                         continue;
1413                 }
1414
1415                 resolved = search_ldap_url( base[b]->b_url, substs, name,
1416                                             base[b]->b_rdnpref,
1417                                             base[b]->b_m_entries,
1418                                             to, nto, togroups, ngroups,
1419                                             err, nerr, type );
1420                 if ( resolved )
1421                         break;
1422         }
1423         return( resolved );
1424 }
1425
1426 static void
1427 do_address(
1428         char    *name,
1429         char    ***to,
1430         int     *nto,
1431         Group   ***togroups,
1432         int     *ngroups,
1433         Error   **err,
1434         int     *nerr,
1435         int     type
1436 )
1437 {
1438         struct timeval  timeout;
1439         char            *localpart, *domainpart;
1440         int             resolved;
1441         Subst   substs[5];
1442
1443         /*
1444          * Look up the name in X.500, add the appropriate addresses found
1445          * to the to list, or to the err list in case of error.  Groups are
1446          * handled by the do_group routine, individuals are handled here.
1447          * When looking up name, we follow the bases hierarchy, looking
1448          * in base[0] first, then base[1], etc.  For each base, there is
1449          * a set of search filters to try, in order.  If something goes
1450          * wrong here trying to contact X.500, we exit with EX_TEMPFAIL.
1451          * If the b_rdnpref flag is set, then we give preference to entries
1452          * that matched name because it's their rdn, otherwise not.
1453          */
1454
1455         split_address( name, &localpart, &domainpart );
1456         timeout.tv_sec = MAIL500_TIMEOUT;
1457         timeout.tv_usec = 0;
1458         substs[0].sub_char = 'm';
1459         substs[0].sub_value = name;
1460         substs[1].sub_char = 'h';
1461         substs[1].sub_value = host;
1462         substs[2].sub_char = 'l';
1463         substs[2].sub_value = localpart;
1464         substs[3].sub_char = 'd';
1465         substs[3].sub_value = domainpart;
1466         substs[4].sub_char = '\0';
1467         substs[4].sub_value = NULL;
1468
1469         resolved = search_bases( NULL, substs, name,
1470                                  to, nto, togroups, ngroups,
1471                                  err, nerr, type );
1472
1473         if ( !resolved ) {
1474                 /* not resolved - bounce with user unknown */
1475                 if ( type == USER ) {
1476                         add_error( err, nerr, E_USERUNKNOWN, name, NULL );
1477                 } else {
1478                         add_error( err, nerr, E_GROUPUNKNOWN, name, NULL );
1479                 }
1480         }
1481 }
1482
1483 static void
1484 send_message( char **to )
1485 {
1486         int     pid;
1487 #ifndef HAVE_WAITPID
1488         WAITSTATUSTYPE  status;
1489 #endif
1490
1491         if ( debug ) {
1492                 char    buf[1024];
1493                 int     i;
1494
1495                 strcpy( buf, to[0] );
1496                 for ( i = 1; to[i] != NULL; i++ ) {
1497                         strcat( buf, " " );
1498                         strcat( buf, to[i] );
1499                 }
1500
1501                 syslog( LOG_ALERT, "send_message execing sendmail: (%s)", buf );
1502         }
1503
1504         /* parent */
1505         if ( (pid = fork()) != 0 ) {
1506 #ifdef HAVE_WAITPID
1507                 waitpid( pid, (int *) NULL, 0 );
1508 #else
1509                 wait4( pid, &status, WAIT_FLAGS, 0 );
1510 #endif
1511         /* child */
1512         } else {
1513                 /* to includes sendmailargs */
1514                 execv( MAIL500_SENDMAIL, to );
1515
1516                 syslog( LOG_ALERT, "execv failed" );
1517
1518                 exit( EX_TEMPFAIL );
1519         }
1520 }
1521
1522 static void
1523 send_group( Group **group, int ngroup )
1524 {
1525         int     i, pid;
1526         char    **argv;
1527         int     argc;
1528         char    *iargv[7];
1529 #ifndef HAVE_WAITPID
1530         WAITSTATUSTYPE  status;
1531 #endif
1532
1533         for ( i = 0; i < ngroup; i++ ) {
1534                 (void) rewind( stdin );
1535
1536                 iargv[0] = MAIL500_SENDMAIL;
1537                 iargv[1] = "-f";
1538                 iargv[2] = group[i]->g_errorsto;
1539                 iargv[3] = "-oMrX.500";
1540                 iargv[4] = "-odi";
1541                 iargv[5] = "-oi";
1542                 iargv[6] = NULL;
1543
1544                 argv = NULL;
1545                 argc = 0;
1546                 add_to( &argv, &argc, iargv );
1547                 add_to( &argv, &argc, group[i]->g_members );
1548
1549                 if ( debug ) {
1550                         char    buf[1024];
1551                         int     i;
1552
1553                         strcpy( buf, argv[0] );
1554                         for ( i = 1; i < argc; i++ ) {
1555                                 strcat( buf, " " );
1556                                 strcat( buf, argv[i] );
1557                         }
1558
1559                         syslog( LOG_ALERT, "execing sendmail: (%s)", buf );
1560                 }
1561
1562                 /* parent */
1563                 if ( (pid = fork()) != 0 ) {
1564 #ifdef HAVE_WAITPID
1565                         waitpid( pid, (int *) NULL, 0 );
1566 #else
1567                         wait4( pid, &status, WAIT_FLAGS, 0 );
1568 #endif
1569                 /* child */
1570                 } else {
1571                         execv( MAIL500_SENDMAIL, argv );
1572
1573                         syslog( LOG_ALERT, "execv failed" );
1574
1575                         exit( EX_TEMPFAIL );
1576                 }
1577         }
1578 }
1579
1580 static void
1581 send_errors( Error *err, int nerr )
1582 {
1583         int     pid, i, namelen;
1584         FILE    *fp;
1585         int     fd[2];
1586         char    *argv[8];
1587         char    buf[1024];
1588 #ifndef HAVE_WAITPID
1589         WAITSTATUSTYPE  status;
1590 #endif
1591
1592         if ( strcmp( MAIL500_BOUNCEFROM, mailfrom ) == 0 ) {
1593             mailfrom = errorsfrom;
1594         }
1595
1596         argv[0] = MAIL500_SENDMAIL;
1597         argv[1] = "-oMrX.500";
1598         argv[2] = "-odi";
1599         argv[3] = "-oi";
1600         argv[4] = "-f";
1601         argv[5] = MAIL500_BOUNCEFROM;
1602         argv[6] = mailfrom;
1603         argv[7] = NULL;
1604
1605         if ( debug ) {
1606                 int     i;
1607
1608                 strcpy( buf, argv[0] );
1609                 for ( i = 1; argv[i] != NULL; i++ ) {
1610                         strcat( buf, " " );
1611                         strcat( buf, argv[i] );
1612                 }
1613
1614                 syslog( LOG_ALERT, "execing sendmail: (%s)", buf );
1615         }
1616
1617         if ( pipe( fd ) == -1 ) {
1618                 syslog( LOG_ALERT, "cannot create pipe" );
1619                 exit( EX_TEMPFAIL );
1620         }
1621
1622         if ( (pid = fork()) != 0 ) {
1623                 if ( (fp = fdopen( fd[1], "w" )) == NULL ) {
1624                         syslog( LOG_ALERT, "cannot fdopen pipe" );
1625                         exit( EX_TEMPFAIL );
1626                 }
1627
1628                 fprintf( fp, "To: %s\n", mailfrom );
1629                 fprintf( fp, "From: %s\n", errorsfrom );
1630                 fprintf( fp, "Subject: undeliverable mail\n" );
1631                 fprintf( fp, "\n" );
1632                 fprintf( fp, "The following errors occurred when trying to deliver the attached mail:\n" );
1633                 for ( i = 0; i < nerr; i++ ) {
1634                         namelen = strlen( err[i].e_addr );
1635                         fprintf( fp, "\n" );
1636
1637                         switch ( err[i].e_code ) {
1638                         case E_USERUNKNOWN:
1639                                 fprintf( fp, "%s: User unknown\n", err[i].e_addr );
1640                                 break;
1641
1642                         case E_GROUPUNKNOWN:
1643                                 fprintf( fp, "%s: Group unknown\n", err[i].e_addr );
1644                                 break;
1645
1646                         case E_BADMEMBER:
1647                                 fprintf( fp, "%s: Group member does not exist\n",
1648                                     err[i].e_addr );
1649                                 fprintf( fp, "This could be because the distinguished name of the person has changed\n" );
1650                                 fprintf( fp, "If this is the case, the problem can be solved by removing and\n" );
1651                                 fprintf( fp, "then re-adding the person to the group.\n" );
1652                                 break;
1653
1654                         case E_NOREQUEST:
1655                                 fprintf( fp, "%s: Group exists but has no request address\n",
1656                                     err[i].e_addr );
1657                                 break;
1658
1659                         case E_NOERRORS:
1660                                 fprintf( fp, "%s: Group exists but has no errors-to address\n",
1661                                     err[i].e_addr );
1662                                 break;
1663
1664                         case E_NOOWNER:
1665                                 fprintf( fp, "%s: Group exists but has no owner\n",
1666                                     err[i].e_addr );
1667                                 break;
1668
1669                         case E_AMBIGUOUS:
1670                                 do_ambiguous( fp, &err[i], namelen );
1671                                 break;
1672
1673                         case E_NOEMAIL:
1674                                 do_noemail( fp, &err[i], namelen );
1675                                 break;
1676
1677                         case E_MEMBERNOEMAIL:
1678                                 fprintf( fp, "%s: Group member exists but does not have an email address\n",
1679                                     err[i].e_addr );
1680                                 break;
1681
1682                         case E_JOINMEMBERNOEMAIL:
1683                                 fprintf( fp, "%s: User has joined group but does not have an email address\n",
1684                                     err[i].e_addr );
1685                                 break;
1686
1687                         case E_LOOP:
1688                                 fprintf( fp, "%s: User has created a mail loop by adding address %s to their X.500 entry\n",
1689                                     err[i].e_addr, err[i].e_loop );
1690                                 break;
1691
1692                         case E_NOMEMBERS:
1693                                 fprintf( fp, "%s: Group has no members\n",
1694                                     err[i].e_addr );
1695                                 break;
1696
1697                         case E_NOOWNADDRESS:
1698                                 fprintf( fp, "%s: Not enough information to perform required routing\n",
1699                                     err[i].e_addr );
1700                                 break;
1701
1702                         default:
1703                                 syslog( LOG_ALERT, "unknown error %d", err[i].e_code );
1704                                 unbind_and_exit( EX_TEMPFAIL );
1705                                 break;
1706                         }
1707                 }
1708
1709                 fprintf( fp, "\n------- The original message sent:\n\n" );
1710
1711                 while ( fgets( buf, sizeof(buf), stdin ) != NULL ) {
1712                         fputs( buf, fp );
1713                 }
1714                 fclose( fp );
1715
1716 #ifdef HAVE_WAITPID
1717                 waitpid( pid, (int *) NULL, 0 );
1718 #else
1719                 wait4( pid, &status, WAIT_FLAGS, 0 );
1720 #endif
1721         } else {
1722                 dup2( fd[0], 0 );
1723
1724                 execv( MAIL500_SENDMAIL, argv );
1725
1726                 syslog( LOG_ALERT, "execv failed" );
1727
1728                 exit( EX_TEMPFAIL );
1729         }
1730 }
1731
1732 static void
1733 do_noemail( FILE *fp, Error *err, int namelen )
1734 {
1735         int             i, last;
1736         char            *dn, *rdn;
1737         char            **ufn, **vals;
1738
1739         fprintf(fp, "%s: User has no email address registered.\n",
1740             err->e_addr );
1741         fprintf( fp, "%*s  Name, title, postal address and phone for '%s':\n\n",
1742             namelen, " ", err->e_addr );
1743
1744         /* name */
1745         dn = ldap_get_dn( ld, err->e_msg );
1746         ufn = ldap_explode_dn( dn, 1 );
1747         rdn = strdup( ufn[0] );
1748         if ( strcasecmp( rdn, err->e_addr ) == 0 ) {
1749                 if ( (vals = ldap_get_values( ld, err->e_msg, "cn" ))
1750                     != NULL ) {
1751                         for ( i = 0; vals[i]; i++ ) {
1752                                 last = strlen( vals[i] ) - 1;
1753                                 if ( isdigit((unsigned char) vals[i][last]) ) {
1754                                         rdn = strdup( vals[i] );
1755                                         break;
1756                                 }
1757                         }
1758
1759                         ldap_value_free( vals );
1760                 }
1761         }
1762         fprintf( fp, "%*s  %s\n", namelen, " ", rdn );
1763         free( dn );
1764         free( rdn );
1765         ldap_value_free( ufn );
1766
1767         /* titles or descriptions */
1768         if ( (vals = ldap_get_values( ld, err->e_msg, "title" )) == NULL &&
1769             (vals = ldap_get_values( ld, err->e_msg, "description" ))
1770             == NULL ) {
1771                 fprintf( fp, "%*s  No title or description registered\n",
1772                     namelen, " " );
1773         } else {
1774                 for ( i = 0; vals[i] != NULL; i++ ) {
1775                         fprintf( fp, "%*s  %s\n", namelen, " ", vals[i] );
1776                 }
1777
1778                 ldap_value_free( vals );
1779         }
1780
1781         /* postal address */
1782         if ( (vals = ldap_get_values( ld, err->e_msg, "postalAddress" ))
1783             == NULL ) {
1784                 fprintf( fp, "%*s  No postal address registered\n", namelen,
1785                     " " );
1786         } else {
1787                 fprintf( fp, "%*s  ", namelen, " " );
1788                 for ( i = 0; vals[0][i] != '\0'; i++ ) {
1789                         if ( vals[0][i] == '$' ) {
1790                                 fprintf( fp, "\n%*s  ", namelen, " " );
1791                                 while ( isspace((unsigned char) vals[0][i+1]) )
1792                                         i++;
1793                         } else {
1794                                 fprintf( fp, "%c", vals[0][i] );
1795                         }
1796                 }
1797                 fprintf( fp, "\n" );
1798
1799                 ldap_value_free( vals );
1800         }
1801
1802         /* telephone number */
1803         if ( (vals = ldap_get_values( ld, err->e_msg, "telephoneNumber" ))
1804             == NULL ) {
1805                 fprintf( fp, "%*s  No phone number registered\n", namelen,
1806                     " " );
1807         } else {
1808                 for ( i = 0; vals[i] != NULL; i++ ) {
1809                         fprintf( fp, "%*s  %s\n", namelen, " ", vals[i] );
1810                 }
1811
1812                 ldap_value_free( vals );
1813         }
1814 }
1815
1816 /* ARGSUSED */
1817 static void
1818 do_ambiguous( FILE *fp, Error *err, int namelen )
1819 {
1820         int             i, last;
1821         char            *dn, *rdn;
1822         char            **ufn, **vals;
1823         LDAPMessage     *e;
1824
1825         i = ldap_result2error( ld, err->e_msg, 0 );
1826
1827         fprintf( fp, "%s: Ambiguous user.  %s%d matches found:\n\n",
1828             err->e_addr, i == LDAP_SIZELIMIT_EXCEEDED ? "First " : "",
1829             ldap_count_entries( ld, err->e_msg ) );
1830
1831         for ( e = ldap_first_entry( ld, err->e_msg ); e != NULL;
1832             e = ldap_next_entry( ld, e ) ) {
1833                 dn = ldap_get_dn( ld, e );
1834                 ufn = ldap_explode_dn( dn, 1 );
1835                 rdn = strdup( ufn[0] );
1836                 if ( strcasecmp( rdn, err->e_addr ) == 0 ) {
1837                         if ( (vals = ldap_get_values( ld, e, "cn" )) != NULL ) {
1838                                 for ( i = 0; vals[i]; i++ ) {
1839                                         last = strlen( vals[i] ) - 1;
1840                                         if (isdigit((unsigned char) vals[i][last])) {
1841                                                 rdn = strdup( vals[i] );
1842                                                 break;
1843                                         }
1844                                 }
1845
1846                                 ldap_value_free( vals );
1847                         }
1848                 }
1849
1850                 /*
1851                 if ( isgroup( e ) ) {
1852                         vals = ldap_get_values( ld, e, "description" );
1853                 } else {
1854                         vals = ldap_get_values( ld, e, "title" );
1855                 }
1856                 */
1857                 vals = ldap_get_values( ld, e, "description" );
1858
1859                 fprintf( fp, "    %-20s %s\n", rdn, vals ? vals[0] : "" );
1860                 for ( i = 1; vals && vals[i] != NULL; i++ ) {
1861                         fprintf( fp, "                         %s\n", vals[i] );
1862                 }
1863
1864                 free( dn );
1865                 free( rdn );
1866                 ldap_value_free( ufn );
1867                 if ( vals != NULL )
1868                         ldap_value_free( vals );
1869         }
1870 }
1871
1872 static int
1873 count_values( char **list )
1874 {
1875         int     i;
1876
1877         for ( i = 0; list && list[i] != NULL; i++ )
1878                 ;       /* NULL */
1879
1880         return( i );
1881 }
1882
1883 static void
1884 add_to( char ***list, int *nlist, char **new )
1885 {
1886         int     i, nnew, oldnlist;
1887
1888         nnew = count_values( new );
1889
1890         oldnlist = *nlist;
1891         if ( *list == NULL || *nlist == 0 ) {
1892                 *list = (char **) malloc( (nnew + 1) * sizeof(char *) );
1893                 *nlist = nnew;
1894         } else {
1895                 *list = (char **) realloc( *list, *nlist * sizeof(char *) +
1896                     nnew * sizeof(char *) + sizeof(char *) );
1897                 *nlist += nnew;
1898         }
1899
1900         for ( i = 0; i < nnew; i++ )
1901                 (*list)[i + oldnlist] = strdup( new[i] );
1902         (*list)[*nlist] = NULL;
1903 }
1904
1905 static void
1906 add_single_to( char ***list, char *new )
1907 {
1908         int     nlist;
1909
1910         if ( *list == NULL ) {
1911                 nlist = 0;
1912                 *list = (char **) malloc( 2 * sizeof(char *) );
1913         } else {
1914                 nlist = count_values( *list );
1915                 *list = (char **) realloc( *list,
1916                                            ( nlist + 2 ) * sizeof(char *) );
1917         }
1918
1919         (*list)[nlist] = strdup( new );
1920         (*list)[nlist+1] = NULL;
1921 }
1922
1923 static int
1924 isgroup( LDAPMessage *e )
1925 {
1926         int     i, j;
1927         char    **oclist;
1928
1929         if ( !groupclasses ) {
1930                 return( 0 );
1931         }
1932
1933         oclist = ldap_get_values( ld, e, "objectClass" );
1934
1935         for ( i = 0; oclist[i] != NULL; i++ ) {
1936                 for ( j = 0; groupclasses[j] != NULL; j++ ) {
1937                         if ( strcasecmp( oclist[i], groupclasses[j] ) == 0 ) {
1938                                 ldap_value_free( oclist );
1939                                 return( 1 );
1940                         }
1941                 }
1942         }
1943         ldap_value_free( oclist );
1944
1945         return( 0 );
1946 }
1947
1948 static void
1949 add_error( Error **err, int *nerr, int code, char *addr, LDAPMessage *msg )
1950 {
1951         if ( *nerr == 0 ) {
1952                 *err = (Error *) malloc( sizeof(Error) );
1953         } else {
1954                 *err = (Error *) realloc( *err, (*nerr + 1) * sizeof(Error) );
1955         }
1956
1957         (*err)[*nerr].e_code = code;
1958         (*err)[*nerr].e_addr = strdup( addr );
1959         (*err)[*nerr].e_msg = msg;
1960         (*nerr)++;
1961 }
1962
1963 static void
1964 unbind_and_exit( int rc )
1965 {
1966         int     i;
1967
1968         if ( (i = ldap_unbind( ld )) != LDAP_SUCCESS )
1969                 syslog( LOG_ALERT, "ldap_unbind failed %d\n", i );
1970
1971         exit( rc );
1972 }