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

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