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