git.sur5r.net Git - openldap/blob - servers/slapd/referral.c

   1 /* referral.c - muck with referrals */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2001 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11
  12 #include <ac/socket.h>
  13 #include <ac/errno.h>
  14 #include <ac/signal.h>
  15 #include <ac/string.h>
  16 #include <ac/ctype.h>
  17 #include <ac/time.h>
  18 #include <ac/unistd.h>
  19
  20 #include <ldap_pvt.h>
  21
  22 #include "slap.h"
  23
  24 /*
  25  * This routine generates the DN appropriate to return in
  26  * an LDAP referral.
  27  */
  28 static char * referral_dn_muck(
  29         const char * refDN,
  30         const char * baseDN,
  31         const char * targetDN )
  32 {
  33         char *tmp;
  34         char *nrefDN = NULL;
  35         char *nbaseDN = NULL;
  36         char *ntargetDN = NULL;
  37
  38         if( !baseDN ) {
  39                 /* no base, return target */
  40                 return targetDN ? ch_strdup( targetDN ) : NULL;
  41         }
  42
  43         if( refDN ) {
  44                 nrefDN = dn_validate( tmp = ch_strdup( refDN ) );
  45                 if( !nrefDN ) {
  46                         /* Invalid refDN */
  47                         ch_free( tmp );
  48                         return NULL;
  49                 }
  50         }
  51
  52         if( !targetDN ) {
  53                 /* continuation reference
  54                  *      if refDN present return refDN
  55                  *  else return baseDN
  56                  */
  57                 return nrefDN ? nrefDN : ch_strdup( baseDN );
  58         }
  59
  60         ntargetDN = dn_validate( tmp = ch_strdup( targetDN ) );
  61         if( !ntargetDN ) {
  62                 ch_free( tmp );
  63                 ch_free( nrefDN );
  64                 return NULL;
  65         }
  66
  67         if( nrefDN ) {
  68                 nbaseDN = dn_validate( tmp = ch_strdup( baseDN ) );
  69                 if( !nbaseDN ) {
  70                         /* Invalid baseDN */
  71                         ch_free( ntargetDN );
  72                         ch_free( nrefDN );
  73                         ch_free( tmp );
  74                         return NULL;
  75                 }
  76
  77                 if( strcasecmp( nbaseDN, nrefDN ) == 0 ) {
  78                         ch_free( nrefDN );
  79                         ch_free( nbaseDN );
  80                         return ntargetDN;
  81                 }
  82
  83                 {
  84                         /*
  85                          * FIXME: string based mucking
  86                          */
  87                         char *muck;
  88                         size_t reflen, baselen, targetlen, mucklen;
  89
  90                         reflen = strlen( nrefDN );
  91                         baselen = strlen( nbaseDN );
  92                         targetlen = strlen( ntargetDN );
  93
  94                         if( targetlen < baselen ) {
  95                                 ch_free( nrefDN );
  96                                 ch_free( nbaseDN );
  97                                 return ntargetDN;
  98                         }
  99
 100                         if( strcasecmp( &ntargetDN[targetlen-baselen], nbaseDN ) ) {
 101                                 /* target not subordinate to base */
 102                                 ch_free( nrefDN );
 103                                 ch_free( nbaseDN );
 104                                 return ntargetDN;
 105                         }
 106
 107                         mucklen = targetlen + reflen - baselen;
 108                         muck = ch_malloc( 1 + mucklen );
 109
 110                         strncpy( muck, ntargetDN, targetlen-baselen );
 111                         strcpy( &muck[targetlen-baselen], nrefDN );
 112
 113                         ch_free( nrefDN );
 114                         ch_free( nbaseDN );
 115                         ch_free( ntargetDN );
 116
 117                         return muck;
 118                 }
 119         }
 120
 121         return ntargetDN;
 122 }
 123
 124
 125 /* validate URL for global referral use
 126  *   LDAP URLs must not have:
 127  *     DN, attrs, scope, nor filter
 128  *   Any non-LDAP URL is okay
 129  *
 130  *   XXYYZ: should return an error string
 131  */
 132 int validate_global_referral( const char *url )
 133 {
 134         int rc;
 135         LDAPURLDesc *lurl;
 136
 137         rc = ldap_url_parse_ext( url, &lurl );
 138
 139         switch( rc ) {
 140         case LDAP_URL_SUCCESS:
 141                 break;
 142
 143         case LDAP_URL_ERR_BADSCHEME:
 144                 /* not LDAP hence valid */
 145                 return 0;
 146
 147         default:
 148                 /* other error, bail */
 149 #ifdef NEW_LOGGING
 150                 LDAP_LOG(( "config", LDAP_LEVEL_CRIT,
 151                         "referral: invalid URL (%s): %s (%d)\n",
 152                         url, "" /* ldap_url_error2str(rc) */, rc ));
 153 #else
 154                 Debug( LDAP_DEBUG_ANY,
 155                         "referral: invalid URL (%s): %s (%d)\n",
 156                         url, "" /* ldap_url_error2str(rc) */, rc );
 157 #endif
 158                 return 1;
 159         }
 160
 161         rc = 0;
 162
 163         if( lurl->lud_dn && *lurl->lud_dn ) {
 164 #ifdef NEW_LOGGING
 165                 LDAP_LOG(( "config", LDAP_LEVEL_CRIT,
 166                         "referral: URL (%s): contains DN\n",
 167                         url ));
 168 #else
 169                 Debug( LDAP_DEBUG_ANY,
 170                         "referral: URL (%s): contains DN\n",
 171                         url, 0, 0 );
 172 #endif
 173                 rc = 1;
 174
 175         } else if( lurl->lud_attrs ) {
 176 #ifdef NEW_LOGGING
 177                 LDAP_LOG(( "config", LDAP_LEVEL_CRIT,
 178                         "referral: URL (%s): requests attributes\n",
 179                         url ));
 180 #else
 181                 Debug( LDAP_DEBUG_ANY,
 182                         "referral: URL (%s): requests attributes\n",
 183                         url, 0, 0 );
 184 #endif
 185                 rc = 1;
 186
 187         } else if( lurl->lud_scope != LDAP_SCOPE_DEFAULT ) {
 188 #ifdef NEW_LOGGING
 189                 LDAP_LOG(( "config", LDAP_LEVEL_CRIT,
 190                         "referral: URL (%s): contains explicit scope\n",
 191                         url ));
 192 #else
 193                 Debug( LDAP_DEBUG_ANY,
 194                         "referral: URL (%s): contains explicit scope\n",
 195                         url, 0, 0 );
 196 #endif
 197                 rc = 1;
 198
 199         } else if( lurl->lud_filter ) {
 200 #ifdef NEW_LOGGING
 201                 LDAP_LOG(( "config", LDAP_LEVEL_CRIT,
 202                         "referral: URL (%s): contains explicit filter\n",
 203                         url ));
 204 #else
 205                 Debug( LDAP_DEBUG_ANY,
 206                         "referral: URL (%s): contains explicit filter\n",
 207                         url, 0, 0 );
 208 #endif
 209                 rc = 1;
 210         }
 211
 212         ldap_free_urldesc( lurl );
 213         return rc;
 214 }
 215
 216 BVarray referral_rewrite(
 217         BVarray in,
 218         struct berval *base,
 219         struct berval *target,
 220         int scope )
 221 {
 222         int i;
 223         BVarray refs;
 224         struct berval *iv, *jv;
 225
 226         if( in == NULL ) return NULL;
 227
 228         for( i=0; in[i].bv_val != NULL ; i++ ) {
 229                 /* just count them */
 230         }
 231
 232         if( i < 1 ) return NULL;
 233
 234         refs = ch_malloc( (i+1) * sizeof( struct berval ) );
 235
 236         for( iv=in,jv=refs; iv->bv_val != NULL ; iv++ ) {
 237                 LDAPURLDesc *url;
 238                 int rc = ldap_url_parse_ext( iv->bv_val, &url );
 239
 240                 if( rc == LDAP_URL_ERR_BADSCHEME ) {
 241                         ber_dupbv( jv++, iv );
 242                         continue;
 243
 244                 } else if( rc != LDAP_URL_SUCCESS ) {
 245                         continue;
 246                 }
 247
 248                 {
 249                         char *dn = url->lud_dn;
 250                         url->lud_dn = referral_dn_muck(
 251                                 ( dn && *dn ) ? dn : NULL,
 252                                 base ? base->bv_val : NULL,
 253                                 target ? target->bv_val : NULL );
 254
 255                         ldap_memfree( dn );
 256                 }
 257
 258                 if( url->lud_scope == LDAP_SCOPE_DEFAULT ) {
 259                         url->lud_scope = scope;
 260                 }
 261
 262                 jv->bv_val = ldap_url_desc2str( url );
 263                 jv->bv_len = strlen( jv->bv_val );
 264
 265                 ldap_free_urldesc( url );
 266                 jv++;
 267         }
 268
 269         if( jv == refs ) {
 270                 ch_free( refs );
 271                 refs = NULL;
 272
 273         } else {
 274                 jv->bv_val = NULL;
 275         }
 276
 277         return refs;
 278 }
 279
 280
 281 BVarray get_entry_referrals(
 282         Backend *be,
 283         Connection *conn,
 284         Operation *op,
 285         Entry *e )
 286 {
 287         Attribute *attr;
 288         BVarray refs;
 289         unsigned i;
 290         struct berval *iv, *jv;
 291
 292         AttributeDescription *ad_ref = slap_schema.si_ad_ref;
 293
 294         attr = attr_find( e->e_attrs, ad_ref );
 295
 296         if( attr == NULL ) return NULL;
 297
 298         for( i=0; attr->a_vals[i].bv_val != NULL; i++ ) {
 299                 /* count references */
 300         }
 301
 302         if( i < 1 ) return NULL;
 303
 304         refs = ch_malloc( (i + 1) * sizeof(struct berval));
 305
 306         for( iv=attr->a_vals, jv=refs; iv->bv_val != NULL; iv++ ) {
 307                 unsigned k;
 308                 ber_dupbv( jv, iv );
 309
 310                 /* trim the label */
 311                 for( k=0; k<jv->bv_len; k++ ) {
 312                         if( isspace(jv->bv_val[k]) ) {
 313                                 jv->bv_val[k] = '\0';
 314                                 jv->bv_len = k;
 315                                 break;
 316                         }
 317                 }
 318
 319                 if(     jv->bv_len > 0 ) {
 320                         jv++;
 321                 } else {
 322                         free( jv->bv_val );
 323                 }
 324         }
 325
 326         if( jv == refs ) {
 327                 free( refs );
 328                 refs = NULL;
 329
 330         } else {
 331                 jv->bv_val = NULL;
 332         }
 333
 334         /* we should check that a referral value exists... */
 335         return refs;
 336 }
 337