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

   1 /* referral.c - muck with referrals */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2002 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/string.h>
  15 #include <ac/ctype.h>
  16 #include <ac/time.h>
  17 #include <ac/unistd.h>
  18
  19 #include <ldap_pvt.h>
  20
  21 #include "slap.h"
  22
  23 /*
  24  * This routine generates the DN appropriate to return in
  25  * an LDAP referral.
  26  */
  27 static char * referral_dn_muck(
  28         const char * refDN,
  29         const char * baseDN,
  30         const char * targetDN )
  31 {
  32         int rc;
  33         struct berval bvin;
  34         struct berval nrefDN = { 0, NULL };
  35         struct berval nbaseDN = { 0, NULL };
  36         struct berval ntargetDN = { 0, NULL };
  37
  38         if( !baseDN ) {
  39                 /* no base, return target */
  40                 return targetDN ? ch_strdup( targetDN ) : NULL;
  41         }
  42
  43         if( refDN ) {
  44                 bvin.bv_val = (char *)refDN;
  45                 bvin.bv_len = strlen( refDN );
  46
  47                 rc = dnPretty2( NULL, &bvin, &nrefDN );
  48                 if( rc != LDAP_SUCCESS ) {
  49                         /* Invalid refDN */
  50                         return NULL;
  51                 }
  52         }
  53
  54         if( !targetDN ) {
  55                 /* continuation reference
  56                  *      if refDN present return refDN
  57                  *  else return baseDN
  58                  */
  59                 return nrefDN.bv_len ? nrefDN.bv_val : ch_strdup( baseDN );
  60         }
  61
  62         bvin.bv_val = (char *)targetDN;
  63         bvin.bv_len = strlen( targetDN );
  64
  65         rc = dnPretty2( NULL, &bvin, &ntargetDN );
  66         if( rc != LDAP_SUCCESS ) {
  67                 /* Invalid targetDN */
  68                 ch_free( nrefDN.bv_val );
  69                 return NULL;
  70         }
  71
  72         if( nrefDN.bv_len ) {
  73                 bvin.bv_val = (char *)baseDN;
  74                 bvin.bv_len = strlen( baseDN );
  75
  76                 rc = dnPretty2( NULL, &bvin, &nbaseDN );
  77                 if( rc != LDAP_SUCCESS ) {
  78                         /* Invalid baseDN */
  79                         ch_free( nrefDN.bv_val );
  80                         ch_free( ntargetDN.bv_val );
  81                         return NULL;
  82                 }
  83
  84                 if( dn_match( &nbaseDN, &nrefDN ) == 0 ) {
  85                         ch_free( nrefDN.bv_val );
  86                         ch_free( nbaseDN.bv_val );
  87                         return ntargetDN.bv_val;
  88                 }
  89
  90                 {
  91                         struct berval muck;
  92
  93                         if( ntargetDN.bv_len < nbaseDN.bv_len ) {
  94                                 ch_free( nrefDN.bv_val );
  95                                 ch_free( nbaseDN.bv_val );
  96                                 return ntargetDN.bv_val;
  97                         }
  98
  99                         rc = strcasecmp(
 100                                 &ntargetDN.bv_val[ntargetDN.bv_len-nbaseDN.bv_len],
 101                                 nbaseDN.bv_val );
 102                         if( rc ) {
 103                                 /* target not subordinate to base */
 104                                 ch_free( nrefDN.bv_val );
 105                                 ch_free( nbaseDN.bv_val );
 106                                 return ntargetDN.bv_val;
 107                         }
 108
 109                         muck.bv_len = ntargetDN.bv_len + nrefDN.bv_len - nbaseDN.bv_len;
 110                         muck.bv_val = ch_malloc( muck.bv_len + 1 );
 111
 112                         strncpy( muck.bv_val, ntargetDN.bv_val,
 113                                 ntargetDN.bv_len-nbaseDN.bv_len );
 114                         strcpy( &muck.bv_val[ntargetDN.bv_len-nbaseDN.bv_len],
 115                                 nrefDN.bv_val );
 116
 117                         ch_free( nrefDN.bv_val );
 118                         ch_free( nbaseDN.bv_val );
 119                         ch_free( ntargetDN.bv_val );
 120
 121                         return muck.bv_val;
 122                 }
 123         }
 124
 125         ch_free( nrefDN.bv_val );
 126         return ntargetDN.bv_val;
 127 }
 128
 129
 130 /* validate URL for global referral use
 131  *   LDAP URLs must not have:
 132  *     DN, attrs, scope, nor filter
 133  *   Any non-LDAP URL is okay
 134  *
 135  *   XXYYZ: should return an error string
 136  */
 137 int validate_global_referral( const char *url )
 138 {
 139         int rc;
 140         LDAPURLDesc *lurl;
 141
 142         rc = ldap_url_parse_ext( url, &lurl );
 143
 144         switch( rc ) {
 145         case LDAP_URL_SUCCESS:
 146                 break;
 147
 148         case LDAP_URL_ERR_BADSCHEME:
 149                 /* not LDAP hence valid */
 150                 return 0;
 151
 152         default:
 153                 /* other error, bail */
 154 #ifdef NEW_LOGGING
 155                 LDAP_LOG( CONFIG, CRIT,
 156                         "referral: invalid URL (%s): %s (%d)\n",
 157                         url, "" /* ldap_url_error2str(rc) */, rc );
 158 #else
 159                 Debug( LDAP_DEBUG_ANY,
 160                         "referral: invalid URL (%s): %s (%d)\n",
 161                         url, "" /* ldap_url_error2str(rc) */, rc );
 162 #endif
 163                 return 1;
 164         }
 165
 166         rc = 0;
 167
 168         if( lurl->lud_dn && *lurl->lud_dn ) {
 169 #ifdef NEW_LOGGING
 170                 LDAP_LOG( CONFIG, CRIT, "referral: URL (%s): contains DN\n", url, 0, 0 );
 171 #else
 172                 Debug( LDAP_DEBUG_ANY,
 173                         "referral: URL (%s): contains DN\n",
 174                         url, 0, 0 );
 175 #endif
 176                 rc = 1;
 177
 178         } else if( lurl->lud_attrs ) {
 179 #ifdef NEW_LOGGING
 180                 LDAP_LOG( CONFIG, CRIT,
 181                         "referral: URL (%s): requests attributes\n", url, 0, 0 );
 182 #else
 183                 Debug( LDAP_DEBUG_ANY,
 184                         "referral: URL (%s): requests attributes\n",
 185                         url, 0, 0 );
 186 #endif
 187                 rc = 1;
 188
 189         } else if( lurl->lud_scope != LDAP_SCOPE_DEFAULT ) {
 190 #ifdef NEW_LOGGING
 191                 LDAP_LOG( CONFIG, CRIT,
 192                         "referral: URL (%s): contains explicit scope\n", url, 0, 0 );
 193 #else
 194                 Debug( LDAP_DEBUG_ANY,
 195                         "referral: URL (%s): contains explicit scope\n",
 196                         url, 0, 0 );
 197 #endif
 198                 rc = 1;
 199
 200         } else if( lurl->lud_filter ) {
 201 #ifdef NEW_LOGGING
 202                 LDAP_LOG( CONFIG, CRIT,
 203                         "referral: URL (%s): contains explicit filter\n", url, 0, 0 );
 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 BerVarray referral_rewrite(
 217         BerVarray in,
 218         struct berval *base,
 219         struct berval *target,
 220         int scope )
 221 {
 222         int i;
 223         BerVarray 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 BerVarray get_entry_referrals(
 282         Backend *be,
 283         Connection *conn,
 284         Operation *op,
 285         Entry *e )
 286 {
 287         Attribute *attr;
 288         BerVarray 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( (unsigned char) 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