git.sur5r.net Git - openldap/blob - servers/slapd/back-ldap/suffixmassage.c

   1 /* suffixmassage.c - massages ldap backend dns */
   2 /* $OpenLDAP$ */
   3
   4 /*
   5  * Copyright 1999, Howard Chu, All rights reserved. <hyc@highlandsun.com>
   6  * Copyright 2000, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
   7  *
   8  * Module back-ldap, originally developed by Howard Chu
   9  *
  10  * has been modified by Pierangelo Masarati. The original copyright
  11  * notice has been maintained.
  12  *
  13  * Permission is granted to anyone to use this software for any purpose
  14  * on any computer system, and to alter it and redistribute it, subject
  15  * to the following restrictions:
  16  *
  17  * 1. The author is not responsible for the consequences of use of this
  18  *    software, no matter how awful, even if they arise from flaws in it.
  19  *
  20  * 2. The origin of this software must not be misrepresented, either by
  21  *    explicit claim or by omission.  Since few users ever read sources,
  22  *    credits should appear in the documentation.
  23  *
  24  * 3. Altered versions must be plainly marked as such, and must not be
  25  *    misrepresented as being the original software.  Since few users
  26  *    ever read sources, credits should appear in the documentation.
  27  *
  28  * 4. This notice may not be removed or altered.
  29  */
  30
  31 #include "portable.h"
  32
  33 #include <stdio.h>
  34
  35 #include <ac/socket.h>
  36
  37 #include "slap.h"
  38 #include "back-ldap.h"
  39
  40 #ifdef ENABLE_REWRITE
  41 int
  42 ldap_back_dn_massage(
  43         dncookie *dc,
  44         struct berval *dn,
  45         struct berval *res
  46 )
  47 {
  48         int rc = 0;
  49
  50         switch (rewrite_session( dc->rwmap->rwm_rw, dc->ctx, (dn->bv_len ? dn->bv_val : ""), dc->conn,
  51                                 &res->bv_val )) {
  52         case REWRITE_REGEXEC_OK:
  53                 if ( res->bv_val != NULL ) {
  54                         res->bv_len = strlen( res->bv_val );
  55                 } else {
  56                         *res = *dn;
  57                 }
  58 #ifdef NEW_LOGGING
  59                 LDAP_LOG( BACK_LDAP, DETAIL1,
  60                         "[rw] %s: \"%s\" -> \"%s\"\n", dc->ctx, dn->bv_val, res->bv_val );
  61 #else /* !NEW_LOGGING */
  62                 Debug( LDAP_DEBUG_ARGS,
  63                         "[rw] %s: \"%s\" -> \"%s\"\n", dc->ctx, dn->bv_val, res->bv_val );
  64 #endif /* !NEW_LOGGING */
  65                 rc = LDAP_SUCCESS;
  66                 break;
  67
  68         case REWRITE_REGEXEC_UNWILLING:
  69                 if ( dc->rs ) {
  70                         dc->rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
  71                         dc->rs->sr_text = "Operation not allowed";
  72                 }
  73                 rc = LDAP_UNWILLING_TO_PERFORM;
  74                 break;
  75
  76         case REWRITE_REGEXEC_ERR:
  77                 if ( dc->rs ) {
  78                         dc->rs->sr_err = LDAP_OTHER;
  79                         dc->rs->sr_text = "Rewrite error";
  80                 }
  81                 rc = LDAP_OTHER;
  82                 break;
  83         }
  84         return rc;
  85 }
  86
  87 #else
  88 /*
  89  * ldap_back_dn_massage
  90  *
  91  * Aliases the suffix; based on suffix_alias (servers/slapd/suffixalias.c).
  92  */
  93 int
  94 ldap_back_dn_massage(
  95         dncookie *dc,
  96         struct berval *odn,
  97         struct berval *res
  98 )
  99 {
 100         int     i, src, dst;
 101         struct berval pretty = {0,NULL}, *dn = odn;
 102
 103         assert( res );
 104
 105         if ( dn == NULL ) {
 106                 res->bv_val = NULL;
 107                 res->bv_len = 0;
 108                 return 0;
 109         }
 110         if ( dc->rwmap == NULL || dc->rwmap->rwm_suffix_massage == NULL ) {
 111                 *res = *dn;
 112                 return 0;
 113         }
 114
 115         if ( dc->tofrom ) {
 116                 src = 0 + dc->normalized;
 117                 dst = 2 + dc->normalized;
 118         } else {
 119                 src = 2 + dc->normalized;
 120                 dst = 0 + dc->normalized;
 121                 /* DN from remote server may be in arbitrary form.
 122                  * Pretty it so we can parse reliably.
 123                  */
 124                 dnPretty2( NULL, dn, &pretty, NULL );
 125                 if (pretty.bv_val) dn = &pretty;
 126         }
 127
 128         for ( i = 0;
 129                 dc->rwmap->rwm_suffix_massage[i].bv_val != NULL;
 130                 i += 4 ) {
 131                 int aliasLength = dc->rwmap->rwm_suffix_massage[i+src].bv_len;
 132                 int diff = dn->bv_len - aliasLength;
 133
 134                 if ( diff < 0 ) {
 135                         /* alias is longer than dn */
 136                         continue;
 137                 } else if ( diff > 0 && ( !DN_SEPARATOR(dn->bv_val[diff-1]))) {
 138                         /* boundary is not at a DN separator */
 139                         continue;
 140                         /* At a DN Separator */
 141                 }
 142
 143                 if ( !strcmp( dc->rwmap->rwm_suffix_massage[i+src].bv_val, &dn->bv_val[diff] ) ) {
 144                         res->bv_len = diff + dc->rwmap->rwm_suffix_massage[i+dst].bv_len;
 145                         res->bv_val = ch_malloc( res->bv_len + 1 );
 146                         strncpy( res->bv_val, dn->bv_val, diff );
 147                         strcpy( &res->bv_val[diff], dc->rwmap->rwm_suffix_massage[i+dst].bv_val );
 148 #ifdef NEW_LOGGING
 149                         LDAP_LOG ( BACK_LDAP, ARGS,
 150                                 "ldap_back_dn_massage: converted \"%s\" to \"%s\"\n",
 151                                 dn->bv_val, res->bv_val, 0 );
 152 #else
 153                         Debug( LDAP_DEBUG_ARGS,
 154                                 "ldap_back_dn_massage:"
 155                                 " converted \"%s\" to \"%s\"\n",
 156                                 dn->bv_val, res->bv_val, 0 );
 157 #endif
 158                         break;
 159                 }
 160         }
 161         if (pretty.bv_val) {
 162                 ch_free(pretty.bv_val);
 163                 dn = odn;
 164         }
 165         /* Nothing matched, just return the original DN */
 166         if (res->bv_val == NULL) {
 167                 *res = *dn;
 168         }
 169
 170         return 0;
 171 }
 172 #endif /* !ENABLE_REWRITE */