git.sur5r.net Git - openldap/blob - servers/slapd/back-sql/api.c

   1 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   2  *
   3  * Copyright 1999-2005 The OpenLDAP Foundation.
   4  * Portions Copyright 1999 Dmitry Kovalev.
   5  * Portions Copyright 2004 Pierangelo Masarati.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* ACKNOWLEDGEMENTS:
  17  * This work was initially developed by Dmitry Kovalev for inclusion
  18  * by OpenLDAP Software.  Additional significant contributors include
  19  * Pierangelo Masarati.
  20  */
  21
  22 #include "portable.h"
  23
  24 #include <stdio.h>
  25 #include <sys/types.h>
  26 #include "ac/string.h"
  27
  28 #include "slap.h"
  29 #include "proto-sql.h"
  30
  31 static backsql_api *backsqlapi;
  32
  33 int
  34 backsql_api_config( backsql_info *bi, const char *name )
  35 {
  36         backsql_api     *ba;
  37
  38         assert( bi );
  39         assert( name );
  40
  41         for ( ba = backsqlapi; ba; ba = ba->ba_next ) {
  42                 if ( strcasecmp( name, ba->ba_name ) == 0 ) {
  43                         backsql_api     *ba2;
  44
  45                         ba2 = ch_malloc( sizeof( backsql_api ) );
  46                         *ba2 = *ba;
  47                         ba2->ba_next = bi->sql_api;
  48                         bi->sql_api = ba2;
  49                         return 0;
  50                 }
  51         }
  52
  53         return 1;
  54 }
  55
  56 int
  57 backsql_api_register( backsql_api *ba )
  58 {
  59         backsql_api     *ba2;
  60
  61         assert( ba );
  62
  63         if ( ba->ba_name == NULL ) {
  64                 fprintf( stderr, "API module has no name\n" );
  65                 exit(EXIT_FAILURE);
  66         }
  67
  68         for ( ba2 = backsqlapi; ba2; ba2 = ba2->ba_next ) {
  69                 if ( strcasecmp( ba->ba_name, ba2->ba_name ) == 0 ) {
  70                         fprintf( stderr, "API module \"%s\" already defined\n", ba->ba_name );
  71                         exit( EXIT_FAILURE );
  72                 }
  73         }
  74
  75         ba->ba_next = backsqlapi;
  76         backsqlapi = ba;
  77
  78         return 0;
  79 }
  80
  81 int
  82 backsql_api_dn2odbc( Operation *op, SlapReply *rs, struct berval *dn )
  83 {
  84         backsql_info    *bi = (backsql_info *)op->o_bd->be_private;
  85         backsql_api     *ba;
  86         int             rc;
  87         struct berval   bv;
  88
  89         ba = bi->sql_api;
  90
  91         if ( ba == NULL ) {
  92                 return 0;
  93         }
  94
  95         ber_dupbv( &bv, dn );
  96
  97         for ( ; ba; ba = ba->ba_next ) {
  98                 if ( ba->ba_dn2odbc ) {
  99                         /*
 100                          * The dn2odbc() helper is supposed to rewrite
 101                          * the contents of bv, freeing the original value
 102                          * with ch_free() if required and replacing it
 103                          * with a newly allocated one using ch_malloc()
 104                          * or companion functions.
 105                          *
 106                          * NOTE: it is supposed to __always__ free
 107                          * the value of bv in case of error, and reset
 108                          * it with BER_BVZERO() .
 109                          */
 110                         rc = ( *ba->ba_dn2odbc )( op, rs, &bv );
 111
 112                         if ( rc ) {
 113                                 /* in case of error, dn2odbc() must cleanup */
 114                                 assert( BER_BVISNULL( &bv ) );
 115
 116                                 return rc;
 117                         }
 118                 }
 119         }
 120
 121         assert( !BER_BVISNULL( &bv ) );
 122
 123         *dn = bv;
 124
 125         return 0;
 126 }
 127
 128 int
 129 backsql_api_odbc2dn( Operation *op, SlapReply *rs, struct berval *dn )
 130 {
 131         backsql_info    *bi = (backsql_info *)op->o_bd->be_private;
 132         backsql_api     *ba;
 133         int             rc;
 134         struct berval   bv;
 135
 136         ba = bi->sql_api;
 137
 138         if ( ba == NULL ) {
 139                 return 0;
 140         }
 141
 142         ber_dupbv( &bv, dn );
 143
 144         for ( ; ba; ba = ba->ba_next ) {
 145                 if ( ba->ba_dn2odbc ) {
 146                         rc = ( *ba->ba_odbc2dn )( op, rs, &bv );
 147                         /*
 148                          * The odbc2dn() helper is supposed to rewrite
 149                          * the contents of bv, freeing the original value
 150                          * with ch_free() if required and replacing it
 151                          * with a newly allocated one using ch_malloc()
 152                          * or companion functions.
 153                          *
 154                          * NOTE: it is supposed to __always__ free
 155                          * the value of bv in case of error, and reset
 156                          * it with BER_BVZERO() .
 157                          */
 158                         if ( rc ) {
 159                                 /* in case of error, odbc2dn() must cleanup */
 160                                 assert( BER_BVISNULL( &bv ) );
 161
 162                                 return rc;
 163                         }
 164                 }
 165         }
 166
 167         assert( !BER_BVISNULL( &bv ) );
 168
 169         *dn = bv;
 170
 171         return 0;
 172 }
 173