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/signal.h>
  26 #include <ac/string.h>
  27 #include <ac/sysexits.h>
  28 #include <ac/syslog.h>
  29 #include <ac/time.h>
  30 #include <ac/unistd.h>
  31 #include <ac/wait.h>
  32
  33 #include <sys/stat.h>
  34
  35 #ifdef HAVE_SYS_PARAM_H
  36 #include <sys/param.h>
  37 #endif
  38
  39 #ifdef HAVE_SYS_RESOURCE_H
  40 #include <sys/resource.h>
  41 #endif
  42
  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 ) LDAP_GCCATTR((noreturn));
 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                 p = strpbrk( line, " \t" );
 641                 if ( !p ) {
 642                         syslog( LOG_ALERT,
 643                                 "Missing space at line %d", lineno );
 644                         exit( EX_TEMPFAIL );
 645                 }
 646                 if ( !strncmp( line, "search", p-line ) ) {
 647                         p += strspn( p, " \t" );
 648                         /* TBC, get these */
 649                         rdnpref = 0;
 650                         typemask = 0xFF;
 651                         add_url( p, rdnpref, typemask );
 652                 } else if ( !strncmp(line, "attribute", p-line) ) {
 653                         p += strspn(p, " \t");
 654                         add_attr_semantics( p );
 655                 } else if ( !strncmp(line, "default-attributes", p-line) ) {
 656                         p += strspn(p, " \t");
 657                         add_def_attr( p );
 658                 } else if ( !strncmp(line, "group-classes", p-line) ) {
 659                         p += strspn(p, " \t");
 660                         add_single_to( &groupclasses, p );
 661                 } else {
 662                         syslog( LOG_ALERT,
 663                                 "Unparseable config definition at line %d",
 664                                 lineno );
 665                         exit( EX_TEMPFAIL );
 666                 }
 667         }
 668         fclose( cf );
 669 }
 670
 671 static int
 672 connect_to_x500( void )
 673 {
 674         int opt;
 675
 676         if ( (ld = ldap_init( ldaphost, 0 )) == NULL ) {
 677                 syslog( LOG_ALERT, "ldap_init failed" );
 678                 return( -1 );
 679         }
 680
 681         /*  TBC: Set this only when it makes sense
 682         opt = MAIL500_MAXAMBIGUOUS;
 683         ldap_set_option(ld, LDAP_OPT_SIZELIMIT, &opt);
 684         */
 685         opt = LDAP_DEREF_ALWAYS;
 686         ldap_set_option(ld, LDAP_OPT_DEREF, &opt);
 687
 688         if ( ldap_simple_bind_s( ld, NULL, NULL ) != LDAP_SUCCESS ) {
 689                 syslog( LOG_ALERT, "ldap_simple_bind_s failed" );
 690                 return( -1 );
 691         }
 692
 693         return( 0 );
 694 }
 695
 696 static Group *
 697 new_group( char *dn, Group **list, int *nlist )
 698 {
 699         int     i;
 700         Group   *this_group;
 701
 702         for ( i = 0; i < *nlist; i++ ) {
 703                 if ( strcmp( dn, (*list)[i].g_dn ) == 0 ) {
 704                         syslog( LOG_ALERT, "group loop 2 detected (%s)", dn );
 705                         return NULL;
 706                 }
 707         }
 708
 709         if ( *nlist == 0 ) {
 710                 *list = (Group *) malloc( sizeof(Group) );
 711         } else {
 712                 *list = (Group *) realloc( *list, (*nlist + 1) *
 713                     sizeof(Group) );
 714         }
 715
 716         this_group = *list;
 717
 718         (*list)[*nlist].g_errorsto = NULL;
 719         (*list)[*nlist].g_members = NULL;
 720         (*list)[*nlist].g_nmembers = 0;
 721         /* save the group's dn so we can check for loops above */
 722         (*list)[*nlist].g_dn = strdup( dn );
 723
 724         (*nlist)++;
 725
 726         return( this_group );
 727 }
 728
 729 static void
 730 split_address(
 731         char    *address,
 732         char    **localpart,
 733         char    **domainpart
 734 )
 735 {
 736         char            *p;
 737
 738         if ( ( p = strrchr( address, '@' ) ) == NULL ) {
 739                 *localpart = strdup( address );
 740                 *domainpart = NULL;
 741         } else {
 742                 *localpart = malloc( p - address + 1 );
 743                 strncpy( *localpart, address, p - address );
 744                 (*localpart)[p - address] = '\0';
 745                 p++;
 746                 *domainpart = strdup( p );
 747         }
 748 }
 749
 750 static int
 751 dn_search(
 752         char    **dnlist,
 753         char    *address,
 754         char    ***to,
 755         int     *nto,
 756         Group   **togroups,
 757         int     *ngroups,
 758         Error   **err,
 759         int     *nerr
 760 )
 761 {
 762         int             rc;
 763         int             i;
 764         int             resolved = 0;
 765         LDAPMessage     *res, *e;
 766         struct timeval  timeout;
 767
 768         timeout.tv_sec = MAIL500_TIMEOUT;
 769         timeout.tv_usec = 0;
 770         for ( i = 0; dnlist[i]; i++ ) {
 771                 if ( (rc = ldap_search_st( ld, dnlist[i], LDAP_SCOPE_BASE,
 772                         "(objectclass=*)", def_attr, 0,
 773                          &timeout, &res )) != LDAP_SUCCESS ) {
 774                         if ( rc == LDAP_NO_SUCH_OBJECT ) {
 775                                 add_error( err, nerr, E_BADMEMBER, dnlist[i], NULL );
 776                                 continue;
 777                         } else {
 778                                 syslog( LOG_ALERT, "member search return 0x%x", rc );
 779
 780                                 unbind_and_exit( EX_TEMPFAIL );
 781                         }
 782                 } else {
 783                         if ( (e = ldap_first_entry( ld, res )) == NULL ) {
 784                                 syslog( LOG_ALERT, "member search error parsing entry" );
 785                                 unbind_and_exit( EX_TEMPFAIL );
 786                         }
 787                         if ( entry_engine( e, dnlist[i], address, to, nto,
 788                                            togroups, ngroups, err, nerr,
 789                                            USER | GROUP_MEMBERS ) ) {
 790                                 resolved = 1;
 791                         }
 792                 }
 793         }
 794         return( resolved );
 795 }
 796
 797 static int
 798 search_ldap_url(
 799         char    *url,
 800         Subst   *substs,
 801         char    *address,
 802         int     rdnpref,
 803         int     multi_entry,
 804         char    ***to,
 805         int     *nto,
 806         Group   **togroups,
 807         int     *ngroups,
 808         Error   **err,
 809         int     *nerr,
 810         int     type
 811 )
 812 {
 813         LDAPURLDesc     *ludp;
 814         char            *p, *s, *d;
 815         int             i;
 816         char            filter[1024];
 817         char            realfilter[1024];
 818         LDAPMessage     *e, *res;
 819         int             rc;
 820         char            **attrlist;
 821         struct timeval  timeout;
 822         int             match;
 823         int             resolved = 0;
 824         char            *dn;
 825
 826         timeout.tv_sec = MAIL500_TIMEOUT;
 827         timeout.tv_usec = 0;
 828
 829         rc = ldap_url_parse( url, &ludp );
 830         if ( rc ) {
 831                 switch ( rc ) {
 832                 case LDAP_URL_ERR_NOTLDAP:
 833                         syslog( LOG_ALERT,
 834                                 "Not an LDAP URL: %s", url );
 835                         break;
 836                 case LDAP_URL_ERR_BADENCLOSURE:
 837                         syslog( LOG_ALERT,
 838                                 "Bad Enclosure in URL: %s", url );
 839                         break;
 840                 case LDAP_URL_ERR_BADURL:
 841                         syslog( LOG_ALERT,
 842                                 "Bad URL: %s", url );
 843                         break;
 844                 case LDAP_URL_ERR_BADHOST:
 845                         syslog( LOG_ALERT,
 846                                 "Host is invalid in URL: %s", url );
 847                         break;
 848                 case LDAP_URL_ERR_BADATTRS:
 849                         syslog( LOG_ALERT,
 850                                 "Attributes are invalid in URL: %s", url );
 851                         break;
 852                 case LDAP_URL_ERR_BADSCOPE:
 853                         syslog( LOG_ALERT,
 854                                 "Scope is invalid in URL: %s", url );
 855                         break;
 856                 case LDAP_URL_ERR_BADFILTER:
 857                         syslog( LOG_ALERT,
 858                                 "Filter is invalid in URL: %s", url );
 859                         break;
 860                 case LDAP_URL_ERR_BADEXTS:
 861                         syslog( LOG_ALERT,
 862                                 "Extensions are invalid in URL: %s", url );
 863                         break;
 864                 case LDAP_URL_ERR_MEM:
 865                         syslog( LOG_ALERT,
 866                                 "Out of memory parsing URL: %s", url );
 867                         break;
 868                 case LDAP_URL_ERR_PARAM:
 869                         syslog( LOG_ALERT,
 870                                 "bad parameter parsing URL: %s", url );
 871                         break;
 872                 default:
 873                         syslog( LOG_ALERT,
 874                                 "Unknown error %d parsing URL: %s",
 875                                 rc, url );
 876                         break;
 877                 }
 878                 add_error( err, nerr, E_BADMEMBER,
 879                            url, NULL );
 880                 return 0;
 881         }
 882
 883         if ( substs ) {
 884                 for ( s = ludp->lud_filter, d = filter; *s; s++,d++ ) {
 885                         if ( *s == '%' ) {
 886                                 s++;
 887                                 if ( *s == '%' ) {
 888                                         *d = '%';
 889                                         continue;
 890                                 }
 891                                 for ( i = 0; substs[i].sub_char != '\0';
 892                                       i++ ) {
 893                                         if ( *s == substs[i].sub_char ) {
 894                                                 for ( p = substs[i].sub_value;
 895                                                       *p; p++,d++ ) {
 896                                                         *d = *p;
 897                                                 }
 898                                                 d--;
 899                                                 break;
 900                                         }
 901                                 }
 902                                 if ( substs[i].sub_char == '\0' ) {
 903                                         syslog( LOG_ALERT,
 904                                                 "unknown format %c", *s );
 905                                 }
 906                         } else {
 907                                 *d = *s;
 908                         }
 909                 }
 910                 *d = *s;
 911         } else {
 912                 strncpy( filter, ludp->lud_filter, sizeof( filter ) - 1 );
 913                 filter[ sizeof( filter ) - 1 ] = '\0';
 914         }
 915
 916         for ( s = filter, d = realfilter; *s; s++, d++ ) {
 917                 if ( *s == '*' ) {
 918                         *d++ = '\\';
 919                 }
 920                 *d = *s;
 921         }
 922         *d = '\0';
 923
 924         if ( ludp->lud_attrs ) {
 925                 attrlist = ludp->lud_attrs;
 926         } else {
 927                 attrlist = def_attr;
 928         }
 929         res = NULL;
 930         /* TBC: we don't read the host, dammit */
 931         rc = ldap_search_st( ld, ludp->lud_dn, ludp->lud_scope,
 932                              realfilter, attrlist, 0,
 933                              &timeout, &res );
 934
 935         /* some other trouble - try again later */
 936         if ( rc != LDAP_SUCCESS &&
 937              rc != LDAP_SIZELIMIT_EXCEEDED ) {
 938                 syslog( LOG_ALERT, "return 0x%x from X.500",
 939                         rc );
 940                 unbind_and_exit( EX_TEMPFAIL );
 941         }
 942
 943         match = ldap_count_entries( ld, res );
 944
 945         /* trouble - try again later */
 946         if ( match == -1 ) {
 947                 syslog( LOG_ALERT, "error parsing result from X.500" );
 948                 unbind_and_exit( EX_TEMPFAIL );
 949         }
 950
 951         if ( match == 1 || multi_entry ) {
 952                 for ( e = ldap_first_entry( ld, res ); e != NULL;
 953                       e = ldap_next_entry( ld, e ) ) {
 954                         dn = ldap_get_dn( ld, e );
 955                         resolved = entry_engine( e, dn, address, to, nto,
 956                                                  togroups, ngroups,
 957                                                  err, nerr, type );
 958                         if ( !resolved ) {
 959                                 add_error( err, nerr, E_NOEMAIL, address, res );
 960                         }
 961                 }
 962                 return ( resolved );
 963         }
 964
 965         /* more than one match - bounce with ambiguous user? */
 966         if ( match > 1 ) {
 967                 LDAPMessage     *next, *tmpres = NULL;
 968                 char            *dn;
 969                 char            **xdn;
 970
 971                 /* not giving rdn preference - bounce with ambiguous user */
 972                 if ( rdnpref == 0 ) {
 973                         add_error( err, nerr, E_AMBIGUOUS, address, res );
 974                         return 0;
 975                 }
 976
 977                 /*
 978                  * giving rdn preference - see if any entries were matched
 979                  * because of their rdn.  If so, collect them to deal with
 980                  * later (== 1 we deliver, > 1 we bounce).
 981                  */
 982
 983                 for ( e = ldap_first_entry( ld, res ); e != NULL; e = next ) {
 984                         next = ldap_next_entry( ld, e );
 985                         dn = ldap_get_dn( ld, e );
 986                         xdn = ldap_explode_dn( dn, 1 );
 987
 988                         /* XXX bad, but how else can we do it? XXX */
 989                         if ( strcasecmp( xdn[0], address ) == 0 ) {
 990                                 ldap_delete_result_entry( &res, e );
 991                                 ldap_add_result_entry( &tmpres, e );
 992                         }
 993
 994                         ldap_value_free( xdn );
 995                         free( dn );
 996                 }
 997
 998                 /* nothing matched by rdn - go ahead and bounce */
 999                 if ( tmpres == NULL ) {
1000                         add_error( err, nerr, E_AMBIGUOUS, address, res );
1001                         return 0;
1002
1003                 /* more than one matched by rdn - bounce with rdn matches */
1004                 } else if ( (match = ldap_count_entries( ld, tmpres )) > 1 ) {
1005                         add_error( err, nerr, E_AMBIGUOUS, address, tmpres );
1006                         return 0;
1007
1008                 /* trouble... */
1009                 } else if ( match < 0 ) {
1010                         syslog( LOG_ALERT, "error parsing result from X.500" );
1011                         unbind_and_exit( EX_TEMPFAIL );
1012                 }
1013
1014                 /* otherwise one matched by rdn - send to it */
1015                 ldap_msgfree( res );
1016                 res = tmpres;
1017
1018                 /* trouble */
1019                 if ( (e = ldap_first_entry( ld, res )) == NULL ) {
1020                         syslog( LOG_ALERT, "error parsing entry from X.500" );
1021                         unbind_and_exit( EX_TEMPFAIL );
1022                 }
1023
1024                 dn = ldap_get_dn( ld, e );
1025
1026                 resolved = entry_engine( e, dn, address, to, nto,
1027                                          togroups, ngroups,
1028                                          err, nerr, type );
1029                 if ( !resolved ) {
1030                         add_error( err, nerr, E_NOEMAIL, address, res );
1031                         /* Don't free res if we passed it to add_error */
1032                 } else {
1033                         ldap_msgfree( res );
1034                 }
1035         }
1036         return( resolved );
1037 }
1038
1039 static int
1040 url_list_search(
1041         char    **urllist,
1042         char    *address,
1043         int     multi_entry,
1044         char    ***to,
1045         int     *nto,
1046         Group   **togroups,
1047         int     *ngroups,
1048         Error   **err,
1049         int     *nerr,
1050         int     type
1051 )
1052 {
1053         int             i;
1054         int             resolved = 0;
1055
1056         for ( i = 0; urllist[i]; i++ ) {
1057
1058                 if ( !strncasecmp( urllist[i], "mail:", 5 ) ) {
1059                         char    *vals[2];
1060
1061                         vals[0] = urllist[i] + 5;
1062                         vals[1] = NULL;
1063                         add_to( to, nto, vals );
1064                         resolved = 1;
1065
1066                 } else if ( ldap_is_ldap_url( urllist[i] ) ) {
1067
1068                         resolved = search_ldap_url( urllist[i], NULL,
1069                                                     address, 0, multi_entry,
1070                                                     to, nto, togroups, ngroups,
1071                                                     err, nerr, type );
1072                 } else {
1073                         /* Produce some sensible error here */
1074                         resolved = 0;
1075                 }
1076         }
1077         return( resolved );
1078 }
1079
1080 /*
1081  * The entry engine processes an entry.  Normally, each entry will resolve
1082  * to one or more values that will be added to the 'to' argument.  This
1083  * argument needs not be the global 'to' list, it may be the g_to field
1084  * in a group.  Groups have no special treatment, unless they require
1085  * a special sender.
1086  */
1087
1088 static int
1089 entry_engine(
1090         LDAPMessage *e,
1091         char    *dn,
1092         char    *address,
1093         char    ***to,
1094         int     *nto,
1095         Group   **togroups,
1096         int     *ngroups,
1097         Error   **err,
1098         int     *nerr,
1099         int     type
1100 )
1101 {
1102         char    **vals;
1103         int     i;
1104         int     resolved = 0;
1105         char    ***current_to = to;
1106         int     *current_nto = nto;
1107         Group   *current_group = NULL;
1108         char    buf[1024];
1109         char    *localpart, *domainpart;
1110         Subst   substs[2];
1111
1112         for ( i=0; attr_semantics[i] != NULL; i++ ) {
1113                 AttrSemantics   *as = attr_semantics[i];
1114                 int             nent;
1115
1116                 vals = ldap_get_values( ld, e, as->as_name );
1117                 if ( !vals || vals[0] == NULL ) {
1118                         continue;
1119                 }
1120                 nent = count_values( vals );
1121                 if ( nent > 1 && !as->as_m_valued ) {
1122                         add_error( err, nerr, E_AMBIGUOUS, address, e );
1123                         return( 0 );
1124                 }
1125                 switch ( as->as_kind ) {
1126                 case AS_KIND_RECIPIENT:
1127                         if ( ! ( type & ( USER | GROUP_MEMBERS ) ) )
1128                                 break;
1129                         switch ( as->as_syntax ) {
1130                         case AS_SYNTAX_RFC822:
1131                                 add_to( current_to, current_nto, vals );
1132                                 resolved = 1;
1133                                 break;
1134                         case AS_SYNTAX_RFC822_EXT:
1135                                 add_to( current_to, current_nto, vals );
1136                                 resolved = 1;
1137                                 break;
1138                         case AS_SYNTAX_NATIVE_MB:
1139                                 /* We used to concatenate mailHost if set here */
1140                                 /*
1141                                  * We used to send a copy to the vacation host
1142                                  * if onVacation to uid@vacationhost
1143                                  */
1144                                 add_to( current_to, current_nto, vals );
1145                                 resolved = 1;
1146                                 break;
1147
1148                         case AS_SYNTAX_DN:
1149                                 if ( dn_search( vals, address,
1150                                                 current_to, current_nto,
1151                                                 togroups, ngroups,
1152                                                 err, nerr ) ) {
1153                                         resolved = 1;
1154                                 }
1155                                 break;
1156
1157                         case AS_SYNTAX_URL:
1158                                 if ( url_list_search( vals, address,
1159                                                  as->as_m_entries,
1160                                                  current_to, current_nto,
1161                                                  togroups, ngroups,
1162                                                  err, nerr, type ) ) {
1163                                         resolved = 1;
1164                                 }
1165                                 break;
1166
1167                         case AS_SYNTAX_BOOL_FILTER:
1168                                 if ( strcasecmp( vals[0], "true" ) ) {
1169                                         break;
1170                                 }
1171                                 substs[0].sub_char = 'D';
1172                                 substs[0].sub_value = dn;
1173                                 substs[1].sub_char = '\0';
1174                                 substs[1].sub_value = NULL;
1175                                 if ( url_list_search( vals, address,
1176                                                  as->as_m_entries,
1177                                                  current_to, current_nto,
1178                                                  togroups, ngroups,
1179                                                  err, nerr, type ) ) {
1180                                         resolved = 1;
1181                                 }
1182                                 break;
1183
1184                         default:
1185                                 syslog( LOG_ALERT,
1186                                         "Invalid syntax %d for kind %d",
1187                                         as->as_syntax, as->as_kind );
1188                                 break;
1189                         }
1190                         break;
1191
1192                 case AS_KIND_ERRORS:
1193                         /* This is a group with special processing */
1194                         if ( type & GROUP_ERRORS ) {
1195                                 switch (as->as_kind) {
1196                                 case AS_SYNTAX_RFC822:
1197                                         add_to( current_to, current_nto, vals );
1198                                         resolved = 1;
1199                                         break;
1200                                 case AS_SYNTAX_URL:
1201                                 default:
1202                                         syslog( LOG_ALERT,
1203                                                 "Invalid syntax %d for kind %d",
1204                                                 as->as_syntax, as->as_kind );
1205                                 }
1206                         } else {
1207                                 current_group = new_group( dn, togroups,
1208                                                            ngroups );
1209                                 current_to = &current_group->g_members;
1210                                 current_nto = &current_group->g_nmembers;
1211                                 split_address( address,
1212                                                &localpart, &domainpart );
1213                                 if ( domainpart ) {
1214                                         sprintf( buf, "%s-%s@%s",
1215                                                  localpart, ERRORS,
1216                                                  domainpart );
1217                                         free( localpart );
1218                                         free( domainpart );
1219                                 } else {
1220                                         sprintf( buf, "%s-%s@%s",
1221                                                  localpart, ERRORS,
1222                                                  host );
1223                                         free( localpart );
1224                                 }
1225                                 current_group->g_errorsto = strdup( buf );
1226                         }
1227                         break;
1228
1229                 case AS_KIND_REQUEST:
1230                         /* This is a group with special processing */
1231                         if ( type & GROUP_REQUEST ) {
1232                                 add_to( current_to, current_nto, vals );
1233                                 resolved = 1;
1234                         }
1235                         break;
1236
1237                 case AS_KIND_OWNER:
1238                         /* This is a group with special processing */
1239                         if ( type & GROUP_REQUEST ) {
1240                                 add_to( current_to, current_nto, vals );
1241                                 resolved = 1;
1242                         }
1243                         break;
1244
1245                 default:
1246                         syslog( LOG_ALERT,
1247                                 "Invalid kind %d", as->as_kind );
1248                         /* Error, TBC */
1249                 }
1250                 ldap_value_free( vals );
1251                 if ( as->as_final ) {
1252                         return( resolved );
1253                 }
1254         }
1255         return( resolved );
1256 }
1257
1258 static int
1259 search_bases(
1260         char    *filter,
1261         Subst   *substs,
1262         char    *name,
1263         char    ***to,
1264         int     *nto,
1265         Group   **togroups,
1266         int     *ngroups,
1267         Error   **err,
1268         int     *nerr,
1269         int     type
1270 )
1271 {
1272         int             b, resolved = 0;
1273
1274         for ( b = 0; base[b] != NULL; b++ ) {
1275
1276                 if ( ! (base[b]->b_search & type) ) {
1277                         continue;
1278                 }
1279
1280                 resolved = search_ldap_url( base[b]->b_url, substs, name,
1281                                             base[b]->b_rdnpref,
1282                                             base[b]->b_m_entries,
1283                                             to, nto, togroups, ngroups,
1284                                             err, nerr, type );
1285                 if ( resolved )
1286                         break;
1287         }
1288         return( resolved );
1289 }
1290
1291 static void
1292 do_address(
1293         char    *name,
1294         char    ***to,
1295         int     *nto,
1296         Group   **togroups,
1297         int     *ngroups,
1298         Error   **err,
1299         int     *nerr,
1300         int     type
1301 )
1302 {
1303         struct timeval  timeout;
1304         char            *localpart, *domainpart;
1305         int             resolved;
1306         Subst   substs[5];
1307
1308         /*
1309          * Look up the name in X.500, add the appropriate addresses found
1310          * to the to list, or to the err list in case of error.  Groups are
1311          * handled by the do_group routine, individuals are handled here.
1312          * When looking up name, we follow the bases hierarchy, looking
1313          * in base[0] first, then base[1], etc.  For each base, there is
1314          * a set of search filters to try, in order.  If something goes
1315          * wrong here trying to contact X.500, we exit with EX_TEMPFAIL.
1316          * If the b_rdnpref flag is set, then we give preference to entries
1317          * that matched name because it's their rdn, otherwise not.
1318          */
1319
1320         split_address( name, &localpart, &domainpart );
1321         timeout.tv_sec = MAIL500_TIMEOUT;
1322         timeout.tv_usec = 0;
1323         substs[0].sub_char = 'm';
1324         substs[0].sub_value = name;
1325         substs[1].sub_char = 'h';
1326         substs[1].sub_value = host;
1327         substs[2].sub_char = 'l';
1328         substs[2].sub_value = localpart;
1329         substs[3].sub_char = 'd';
1330         substs[3].sub_value = domainpart;
1331         substs[4].sub_char = '\0';
1332         substs[4].sub_value = NULL;
1333
1334         resolved = search_bases( NULL, substs, name,
1335                                  to, nto, togroups, ngroups,
1336                                  err, nerr, type );
1337
1338         if ( !resolved ) {
1339                 /* not resolved - bounce with user unknown */
1340                 if ( type == USER ) {
1341                         add_error( err, nerr, E_USERUNKNOWN, name, NULL );
1342                 } else {
1343                         add_error( err, nerr, E_GROUPUNKNOWN, name, NULL );
1344                 }
1345         }
1346 }
1347
1348 static void
1349 send_message( char **to )
1350 {
1351         int     pid;
1352 #ifndef HAVE_WAITPID
1353         WAITSTATUSTYPE  status;
1354 #endif
1355
1356         if ( debug ) {
1357                 char    buf[1024];
1358                 int     i;
1359
1360                 strcpy( buf, to[0] );
1361                 for ( i = 1; to[i] != NULL; i++ ) {
1362                         strcat( buf, " " );
1363                         strcat( buf, to[i] );
1364                 }
1365
1366                 syslog( LOG_ALERT, "send_message execing sendmail: (%s)", buf );
1367         }
1368
1369         /* parent */
1370         if ( (pid = fork()) != 0 ) {
1371 #ifdef HAVE_WAITPID
1372                 waitpid( pid, (int *) NULL, 0 );
1373 #else
1374                 wait4( pid, &status, WAIT_FLAGS, 0 );
1375 #endif
1376         /* child */
1377         } else {
1378                 /* to includes sendmailargs */
1379                 execv( MAIL500_SENDMAIL, to );
1380
1381                 syslog( LOG_ALERT, "execv failed" );
1382
1383                 exit( EX_TEMPFAIL );
1384         }
1385 }
1386
1387 static void
1388 send_group( Group *group, int ngroup )
1389 {
1390         int     i, pid;
1391         char    **argv;
1392         int     argc;
1393         char    *iargv[7];
1394 #ifndef HAVE_WAITPID
1395         WAITSTATUSTYPE  status;
1396 #endif
1397
1398         for ( i = 0; i < ngroup; i++ ) {
1399                 (void) rewind( stdin );
1400
1401                 iargv[0] = MAIL500_SENDMAIL;
1402                 iargv[1] = "-f";
1403                 iargv[2] = group[i].g_errorsto;
1404                 iargv[3] = "-oMrX.500";
1405                 iargv[4] = "-odi";
1406                 iargv[5] = "-oi";
1407                 iargv[6] = NULL;
1408
1409                 argv = NULL;
1410                 argc = 0;
1411                 add_to( &argv, &argc, iargv );
1412                 add_to( &argv, &argc, group[i].g_members );
1413
1414                 if ( debug ) {
1415                         char    buf[1024];
1416                         int     i;
1417
1418                         strcpy( buf, argv[0] );
1419                         for ( i = 1; i < argc; i++ ) {
1420                                 strcat( buf, " " );
1421                                 strcat( buf, argv[i] );
1422                         }
1423
1424                         syslog( LOG_ALERT, "execing sendmail: (%s)", buf );
1425                 }
1426
1427                 /* parent */
1428                 if ( (pid = fork()) != 0 ) {
1429 #ifdef HAVE_WAITPID
1430                         waitpid( pid, (int *) NULL, 0 );
1431 #else
1432                         wait4( pid, &status, WAIT_FLAGS, 0 );
1433 #endif
1434                 /* child */
1435                 } else {
1436                         execv( MAIL500_SENDMAIL, argv );
1437
1438                         syslog( LOG_ALERT, "execv failed" );
1439
1440                         exit( EX_TEMPFAIL );
1441                 }
1442         }
1443 }
1444
1445 static void
1446 send_errors( Error *err, int nerr )
1447 {
1448         int     pid, i, namelen;
1449         FILE    *fp;
1450         int     fd[2];
1451         char    *argv[8];
1452         char    buf[1024];
1453 #ifndef HAVE_WAITPID
1454         WAITSTATUSTYPE  status;
1455 #endif
1456
1457         if ( strcmp( MAIL500_BOUNCEFROM, mailfrom ) == 0 ) {
1458             mailfrom = errorsfrom;
1459         }
1460
1461         argv[0] = MAIL500_SENDMAIL;
1462         argv[1] = "-oMrX.500";
1463         argv[2] = "-odi";
1464         argv[3] = "-oi";
1465         argv[4] = "-f";
1466         argv[5] = MAIL500_BOUNCEFROM;
1467         argv[6] = mailfrom;
1468         argv[7] = NULL;
1469
1470         if ( debug ) {
1471                 int     i;
1472
1473                 strcpy( buf, argv[0] );
1474                 for ( i = 1; argv[i] != NULL; i++ ) {
1475                         strcat( buf, " " );
1476                         strcat( buf, argv[i] );
1477                 }
1478
1479                 syslog( LOG_ALERT, "execing sendmail: (%s)", buf );
1480         }
1481
1482         if ( pipe( fd ) == -1 ) {
1483                 syslog( LOG_ALERT, "cannot create pipe" );
1484                 exit( EX_TEMPFAIL );
1485         }
1486
1487         if ( (pid = fork()) != 0 ) {
1488                 if ( (fp = fdopen( fd[1], "w" )) == NULL ) {
1489                         syslog( LOG_ALERT, "cannot fdopen pipe" );
1490                         exit( EX_TEMPFAIL );
1491                 }
1492
1493                 fprintf( fp, "To: %s\n", mailfrom );
1494                 fprintf( fp, "From: %s\n", errorsfrom );
1495                 fprintf( fp, "Subject: undeliverable mail\n" );
1496                 fprintf( fp, "\n" );
1497                 fprintf( fp, "The following errors occurred when trying to deliver the attached mail:\n" );
1498                 for ( i = 0; i < nerr; i++ ) {
1499                         namelen = strlen( err[i].e_addr );
1500                         fprintf( fp, "\n" );
1501
1502                         switch ( err[i].e_code ) {
1503                         case E_USERUNKNOWN:
1504                                 fprintf( fp, "%s: User unknown\n", err[i].e_addr );
1505                                 break;
1506
1507                         case E_GROUPUNKNOWN:
1508                                 fprintf( fp, "%s: Group unknown\n", err[i].e_addr );
1509                                 break;
1510
1511                         case E_BADMEMBER:
1512                                 fprintf( fp, "%s: Group member does not exist\n",
1513                                     err[i].e_addr );
1514                                 fprintf( fp, "This could be because the distinguished name of the person has changed\n" );
1515                                 fprintf( fp, "If this is the case, the problem can be solved by removing and\n" );
1516                                 fprintf( fp, "then re-adding the person to the group.\n" );
1517                                 break;
1518
1519                         case E_NOREQUEST:
1520                                 fprintf( fp, "%s: Group exists but has no request address\n",
1521                                     err[i].e_addr );
1522                                 break;
1523
1524                         case E_NOERRORS:
1525                                 fprintf( fp, "%s: Group exists but has no errors-to address\n",
1526                                     err[i].e_addr );
1527                                 break;
1528
1529                         case E_NOOWNER:
1530                                 fprintf( fp, "%s: Group exists but has no owner\n",
1531                                     err[i].e_addr );
1532                                 break;
1533
1534                         case E_AMBIGUOUS:
1535                                 do_ambiguous( fp, &err[i], namelen );
1536                                 break;
1537
1538                         case E_NOEMAIL:
1539                                 do_noemail( fp, &err[i], namelen );
1540                                 break;
1541
1542                         case E_MEMBERNOEMAIL:
1543                                 fprintf( fp, "%s: Group member exists but does not have an email address\n",
1544                                     err[i].e_addr );
1545                                 break;
1546
1547                         case E_JOINMEMBERNOEMAIL:
1548                                 fprintf( fp, "%s: User has joined group but does not have an email address\n",
1549                                     err[i].e_addr );
1550                                 break;
1551
1552                         case E_LOOP:
1553                                 fprintf( fp, "%s: User has created a mail loop by adding address %s to their X.500 entry\n",
1554                                     err[i].e_addr, err[i].e_loop );
1555                                 break;
1556
1557                         case E_NOMEMBERS:
1558                                 fprintf( fp, "%s: Group has no members\n",
1559                                     err[i].e_addr );
1560                                 break;
1561
1562                         default:
1563                                 syslog( LOG_ALERT, "unknown error %d", err[i].e_code );
1564                                 unbind_and_exit( EX_TEMPFAIL );
1565                                 break;
1566                         }
1567                 }
1568
1569                 fprintf( fp, "\n------- The original message sent:\n\n" );
1570
1571                 while ( fgets( buf, sizeof(buf), stdin ) != NULL ) {
1572                         fputs( buf, fp );
1573                 }
1574                 fclose( fp );
1575
1576 #ifdef HAVE_WAITPID
1577                 waitpid( pid, (int *) NULL, 0 );
1578 #else
1579                 wait4( pid, &status, WAIT_FLAGS, 0 );
1580 #endif
1581         } else {
1582                 dup2( fd[0], 0 );
1583
1584                 execv( MAIL500_SENDMAIL, argv );
1585
1586                 syslog( LOG_ALERT, "execv failed" );
1587
1588                 exit( EX_TEMPFAIL );
1589         }
1590 }
1591
1592 static void
1593 do_noemail( FILE *fp, Error *err, int namelen )
1594 {
1595         int             i, last;
1596         char            *dn, *rdn;
1597         char            **ufn, **vals;
1598
1599         fprintf(fp, "%s: User has no email address registered.\n",
1600             err->e_addr );
1601         fprintf( fp, "%*s  Name, title, postal address and phone for '%s':\n\n",
1602             namelen, " ", err->e_addr );
1603
1604         /* name */
1605         dn = ldap_get_dn( ld, err->e_msg );
1606         ufn = ldap_explode_dn( dn, 1 );
1607         rdn = strdup( ufn[0] );
1608         if ( strcasecmp( rdn, err->e_addr ) == 0 ) {
1609                 if ( (vals = ldap_get_values( ld, err->e_msg, "cn" ))
1610                     != NULL ) {
1611                         for ( i = 0; vals[i]; i++ ) {
1612                                 last = strlen( vals[i] ) - 1;
1613                                 if ( isdigit((unsigned char) vals[i][last]) ) {
1614                                         rdn = strdup( vals[i] );
1615                                         break;
1616                                 }
1617                         }
1618
1619                         ldap_value_free( vals );
1620                 }
1621         }
1622         fprintf( fp, "%*s  %s\n", namelen, " ", rdn );
1623         free( dn );
1624         free( rdn );
1625         ldap_value_free( ufn );
1626
1627         /* titles or descriptions */
1628         if ( (vals = ldap_get_values( ld, err->e_msg, "title" )) == NULL &&
1629             (vals = ldap_get_values( ld, err->e_msg, "description" ))
1630             == NULL ) {
1631                 fprintf( fp, "%*s  No title or description registered\n",
1632                     namelen, " " );
1633         } else {
1634                 for ( i = 0; vals[i] != NULL; i++ ) {
1635                         fprintf( fp, "%*s  %s\n", namelen, " ", vals[i] );
1636                 }
1637
1638                 ldap_value_free( vals );
1639         }
1640
1641         /* postal address */
1642         if ( (vals = ldap_get_values( ld, err->e_msg, "postalAddress" ))
1643             == NULL ) {
1644                 fprintf( fp, "%*s  No postal address registered\n", namelen,
1645                     " " );
1646         } else {
1647                 fprintf( fp, "%*s  ", namelen, " " );
1648                 for ( i = 0; vals[0][i] != '\0'; i++ ) {
1649                         if ( vals[0][i] == '$' ) {
1650                                 fprintf( fp, "\n%*s  ", namelen, " " );
1651                                 while ( isspace((unsigned char) vals[0][i+1]) )
1652                                         i++;
1653                         } else {
1654                                 fprintf( fp, "%c", vals[0][i] );
1655                         }
1656                 }
1657                 fprintf( fp, "\n" );
1658
1659                 ldap_value_free( vals );
1660         }
1661
1662         /* telephone number */
1663         if ( (vals = ldap_get_values( ld, err->e_msg, "telephoneNumber" ))
1664             == NULL ) {
1665                 fprintf( fp, "%*s  No phone number registered\n", namelen,
1666                     " " );
1667         } else {
1668                 for ( i = 0; vals[i] != NULL; i++ ) {
1669                         fprintf( fp, "%*s  %s\n", namelen, " ", vals[i] );
1670                 }
1671
1672                 ldap_value_free( vals );
1673         }
1674 }
1675
1676 /* ARGSUSED */
1677 static void
1678 do_ambiguous( FILE *fp, Error *err, int namelen )
1679 {
1680         int             i, last;
1681         char            *dn, *rdn;
1682         char            **ufn, **vals;
1683         LDAPMessage     *e;
1684
1685         i = ldap_result2error( ld, err->e_msg, 0 );
1686
1687         fprintf( fp, "%s: Ambiguous user.  %s%d matches found:\n\n",
1688             err->e_addr, i == LDAP_SIZELIMIT_EXCEEDED ? "First " : "",
1689             ldap_count_entries( ld, err->e_msg ) );
1690
1691         for ( e = ldap_first_entry( ld, err->e_msg ); e != NULL;
1692             e = ldap_next_entry( ld, e ) ) {
1693                 dn = ldap_get_dn( ld, e );
1694                 ufn = ldap_explode_dn( dn, 1 );
1695                 rdn = strdup( ufn[0] );
1696                 if ( strcasecmp( rdn, err->e_addr ) == 0 ) {
1697                         if ( (vals = ldap_get_values( ld, e, "cn" )) != NULL ) {
1698                                 for ( i = 0; vals[i]; i++ ) {
1699                                         last = strlen( vals[i] ) - 1;
1700                                         if (isdigit((unsigned char) vals[i][last])) {
1701                                                 rdn = strdup( vals[i] );
1702                                                 break;
1703                                         }
1704                                 }
1705
1706                                 ldap_value_free( vals );
1707                         }
1708                 }
1709
1710                 /*
1711                 if ( isgroup( e ) ) {
1712                         vals = ldap_get_values( ld, e, "description" );
1713                 } else {
1714                         vals = ldap_get_values( ld, e, "title" );
1715                 }
1716                 */
1717                 vals = ldap_get_values( ld, e, "description" );
1718
1719                 fprintf( fp, "    %-20s %s\n", rdn, vals ? vals[0] : "" );
1720                 for ( i = 1; vals && vals[i] != NULL; i++ ) {
1721                         fprintf( fp, "                         %s\n", vals[i] );
1722                 }
1723
1724                 free( dn );
1725                 free( rdn );
1726                 ldap_value_free( ufn );
1727                 if ( vals != NULL )
1728                         ldap_value_free( vals );
1729         }
1730 }
1731
1732 static int
1733 count_values( char **list )
1734 {
1735         int     i;
1736
1737         for ( i = 0; list && list[i] != NULL; i++ )
1738                 ;       /* NULL */
1739
1740         return( i );
1741 }
1742
1743 static void
1744 add_to( char ***list, int *nlist, char **new )
1745 {
1746         int     i, nnew, oldnlist;
1747
1748         nnew = count_values( new );
1749
1750         oldnlist = *nlist;
1751         if ( *list == NULL || *nlist == 0 ) {
1752                 *list = (char **) malloc( (nnew + 1) * sizeof(char *) );
1753                 *nlist = nnew;
1754         } else {
1755                 *list = (char **) realloc( *list, *nlist * sizeof(char *) +
1756                     nnew * sizeof(char *) + sizeof(char *) );
1757                 *nlist += nnew;
1758         }
1759
1760         for ( i = 0; i < nnew; i++ )
1761                 (*list)[i + oldnlist] = strdup( new[i] );
1762         (*list)[*nlist] = NULL;
1763 }
1764
1765 static void
1766 add_single_to( char ***list, char *new )
1767 {
1768         int     nlist;
1769
1770         if ( *list == NULL ) {
1771                 nlist = 0;
1772                 *list = (char **) malloc( 2 * sizeof(char *) );
1773         } else {
1774                 nlist = count_values( *list );
1775                 *list = (char **) realloc( *list,
1776                                            ( nlist + 2 ) * sizeof(char *) );
1777         }
1778
1779         (*list)[nlist] = strdup( new );
1780         (*list)[nlist+1] = NULL;
1781 }
1782
1783 static int
1784 isgroup( LDAPMessage *e )
1785 {
1786         int     i, j;
1787         char    **oclist;
1788
1789         if ( !groupclasses ) {
1790                 return( 0 );
1791         }
1792
1793         oclist = ldap_get_values( ld, e, "objectClass" );
1794
1795         for ( i = 0; oclist[i] != NULL; i++ ) {
1796                 for ( j = 0; groupclasses[j] != NULL; j++ ) {
1797                         if ( strcasecmp( oclist[i], groupclasses[j] ) == 0 ) {
1798                                 ldap_value_free( oclist );
1799                                 return( 1 );
1800                         }
1801                 }
1802         }
1803         ldap_value_free( oclist );
1804
1805         return( 0 );
1806 }
1807
1808 static void
1809 add_error( Error **err, int *nerr, int code, char *addr, LDAPMessage *msg )
1810 {
1811         if ( *nerr == 0 ) {
1812                 *err = (Error *) malloc( sizeof(Error) );
1813         } else {
1814                 *err = (Error *) realloc( *err, (*nerr + 1) * sizeof(Error) );
1815         }
1816
1817         (*err)[*nerr].e_code = code;
1818         (*err)[*nerr].e_addr = strdup( addr );
1819         (*err)[*nerr].e_msg = msg;
1820         (*nerr)++;
1821 }
1822
1823 static void
1824 unbind_and_exit( int rc )
1825 {
1826         int     i;
1827
1828         if ( (i = ldap_unbind( ld )) != LDAP_SUCCESS )
1829                 syslog( LOG_ALERT, "ldap_unbind failed %d\n", i );
1830
1831         exit( rc );
1832 }