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https://git.openldap.org/openldap/openldap.git
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115408986c
- re-style according to the style giudelines for better readability - updated to recent frontend/backend API changes - fixed a few quirks about normalization - "optimized" a few memory allocation/string handling functions - fixed a few quirks about add/modify (still have to look ad modrdn) todo: - there is still something broken (at least with PostgreSQL and IBM db2, the two RDBMS O have at hand) when adding - move everything to struct bervals and try to save a few strlen - try some LDAP/SQL syntax relation to use appropriate value bind if possible - ...
455 lines
12 KiB
C
455 lines
12 KiB
C
/*
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* Copyright 1999, Dmitry Kovalev <mit@openldap.org>, All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted only
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* as authorized by the OpenLDAP Public License. A copy of this
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* license is available at http://www.OpenLDAP.org/license.html or
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* in file LICENSE in the top-level directory of the distribution.
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*/
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#include "portable.h"
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#ifdef SLAPD_SQL
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#include <stdio.h>
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#include "ac/string.h"
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#include <sys/types.h>
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#include "ldap_pvt.h"
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#include "slap.h"
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#include "back-sql.h"
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#include "sql-types.h"
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#include "sql-wrap.h"
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#include "schema-map.h"
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#define MAX_ATTR_LEN 16384
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typedef struct backsql_conn {
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int ldap_cid;
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SQLHDBC dbh;
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} backsql_db_conn;
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int backsql_dummy( void *, void * );
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void
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backsql_PrintErrors( SQLHENV henv, SQLHDBC hdbc, SQLHSTMT sth, int rc )
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{
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SQLCHAR msg[SQL_MAX_MESSAGE_LENGTH]; /* msg. buffer */
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SQLCHAR state[SQL_SQLSTATE_SIZE]; /* statement buf. */
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SDWORD iSqlCode; /* return code */
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SWORD len = SQL_MAX_MESSAGE_LENGTH - 1; /* return length */
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Debug( LDAP_DEBUG_TRACE, "Return code: %d\n", rc, 0, 0 );
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rc = SQLError( henv, hdbc, sth, state, &iSqlCode, msg,
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SQL_MAX_MESSAGE_LENGTH - 1, &len );
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for ( ; BACKSQL_SUCCESS( rc ); ) {
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Debug( LDAP_DEBUG_TRACE, "Native error code: %d\n",
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(int)iSqlCode, 0, 0 );
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Debug( LDAP_DEBUG_TRACE, "SQL engine state: %s\n",
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state, 0, 0 );
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Debug( LDAP_DEBUG_TRACE, "Message: %s\n", msg, 0, 0 );
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rc = SQLError( henv, hdbc, sth, state, &iSqlCode, msg,
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SQL_MAX_MESSAGE_LENGTH - 1, &len );
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}
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}
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RETCODE
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backsql_Prepare( SQLHDBC dbh, SQLHSTMT *sth, char *query, int timeout )
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{
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RETCODE rc;
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char drv_name[ 30 ];
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SWORD len;
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rc = SQLAllocStmt( dbh, sth );
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if ( rc != SQL_SUCCESS ) {
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return rc;
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}
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#if 0
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Debug( LDAP_DEBUG_TRACE, "==>_SQLPrepare()\n", 0, 0, 0 );
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#endif
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SQLGetInfo( dbh, SQL_DRIVER_NAME, drv_name, 30, &len );
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#if 0
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Debug( LDAP_DEBUG_TRACE, "_SQLPrepare(): driver name='%s'\n",
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drv_name, 0, 0 );
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#endif
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if ( !strncmp( ldap_pvt_str2upper( drv_name ), "SQLSRV32.DLL", 30 ) ) {
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/*
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* stupid default result set in MS SQL Server
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* does not support multiple active statements
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* on the same connection -- so we are trying
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* to make it not to use default result set...
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*/
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Debug( LDAP_DEBUG_TRACE, "_SQLprepare(): "
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"enabling MS SQL Server default result "
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"set workaround\n", 0, 0, 0 );
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rc = SQLSetStmtOption( *sth, SQL_CONCURRENCY,
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SQL_CONCUR_ROWVER );
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if ( rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO ) {
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Debug( LDAP_DEBUG_TRACE, "_SQLPrepare(): "
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"SQLSetStmtOption(SQL_CONCURRENCY,SQL_CONCUR_ROWVER) failed:\n",
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0, 0, 0 );
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backsql_PrintErrors( SQL_NULL_HENV, dbh, *sth, rc );
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}
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}
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if ( timeout > 0 ) {
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Debug( LDAP_DEBUG_TRACE, "_SQLprepare(): "
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"setting query timeout to %d sec.\n",
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timeout, 0, 0 );
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rc = SQLSetStmtOption( *sth, SQL_QUERY_TIMEOUT, timeout );
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if ( rc != SQL_SUCCESS ) {
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backsql_PrintErrors( SQL_NULL_HENV, dbh, *sth, rc );
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}
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}
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#if 0
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Debug( LDAP_DEBUG_TRACE, "<==_SQLPrepare() calling SQLPrepare()\n",
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0, 0, 0 );
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#endif
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return SQLPrepare( *sth, query, SQL_NTS );
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}
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#if 0
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RETCODE
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backsql_BindParamStr( SQLHSTMT sth, int par_ind, char *str, int maxlen )
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{
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RETCODE rc;
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rc = SQLBindParameter( sth, (SQLUSMALLINT)par_ind, SQL_PARAM_INPUT,
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SQL_C_CHAR, SQL_VARCHAR,
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(SQLUINTEGER)maxlen, 0, (SQLPOINTER)str,
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(SQLUINTEGER)maxlen, NULL );
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return rc;
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}
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RETCODE
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backsql_BindParamID( SQLHSTMT sth, int par_ind, unsigned long *id )
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{
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return SQLBindParameter( sth, (SQLUSMALLINT)par_ind,
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SQL_PARAM_INPUT, SQL_C_ULONG, SQL_INTEGER,
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0, 0, (SQLPOINTER)id, 0, (SQLINTEGER*)NULL );
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}
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#endif
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RETCODE
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backsql_BindRowAsStrings( SQLHSTMT sth, BACKSQL_ROW_NTS *row )
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{
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RETCODE rc;
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SQLCHAR colname[ 64 ];
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SQLSMALLINT name_len, col_type, col_scale, col_null;
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UDWORD col_prec;
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int i;
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if ( row == NULL ) {
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return SQL_ERROR;
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}
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#if 0
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Debug( LDAP_DEBUG_TRACE, "==> backsql_BindRowAsStrings()\n", 0, 0, 0 );
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#endif
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rc = SQLNumResultCols( sth, &row->ncols );
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if ( rc != SQL_SUCCESS ) {
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#if 0
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Debug( LDAP_DEBUG_TRACE, "_SQLBindRowAsStrings(): "
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"SQLNumResultCols() failed:\n", 0, 0, 0 );
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#endif
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backsql_PrintErrors( SQL_NULL_HENV, SQL_NULL_HDBC, sth, rc );
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} else {
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#if 0
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Debug( LDAP_DEBUG_TRACE, "backsql_BindRowAsStrings: "
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"ncols=%d\n", (int)row->ncols, 0, 0 );
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#endif
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row->col_names = (char **)ch_calloc( row->ncols,
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sizeof( char * ) );
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row->cols = (char **)ch_calloc( row->ncols, sizeof( char * ) );
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row->col_prec = (UDWORD *)ch_calloc( row->ncols,
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sizeof( UDWORD ) );
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row->is_null = (SQLINTEGER *)ch_calloc( row->ncols,
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sizeof( SQLINTEGER ) );
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for ( i = 1; i <= row->ncols; i++ ) {
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rc = SQLDescribeCol( sth, (SQLSMALLINT)i, &colname[ 0 ],
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(SQLUINTEGER)sizeof( colname ) - 1,
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&name_len, &col_type,
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&col_prec, &col_scale, &col_null );
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row->col_names[ i - 1 ] = ch_strdup( colname );
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#if 0
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Debug( LDAP_DEBUG_TRACE, "backsql_BindRowAsStrings: "
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"col_name=%s, col_prec[%d]=%d\n",
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colname, (int)i, (int)col_prec );
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#endif
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if ( col_type == SQL_LONGVARCHAR
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|| col_type == SQL_LONGVARBINARY) {
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#if 0
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row->cols[ i - 1 ] = NULL;
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row->col_prec[ i - 1 ] = -1;
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/*
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* such fields must be handled
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* in some other way since they return 2G
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* as their precision (at least it does so
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* with MS SQL Server w/native driver)
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* for now, we just set fixed precision
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* for such fields - dirty hack, but...
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* no time to deal with SQLGetData()
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*/
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#endif
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col_prec = MAX_ATTR_LEN;
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row->cols[ i - 1 ] = (char *)ch_calloc( col_prec + 1, sizeof( char ) );
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row->col_prec[ i - 1 ] = col_prec;
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rc = SQLBindCol( sth, (SQLUSMALLINT)i,
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SQL_C_CHAR,
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(SQLPOINTER)row->cols[ i - 1 ],
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col_prec + 1,
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&row->is_null[ i - 1 ] );
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} else {
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row->cols[ i - 1 ] = (char *)ch_calloc( col_prec + 1, sizeof( char ) );
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row->col_prec[ i - 1 ] = col_prec;
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rc = SQLBindCol( sth, (SQLUSMALLINT)i,
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SQL_C_CHAR,
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(SQLPOINTER)row->cols[ i - 1 ],
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col_prec + 1,
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&row->is_null[ i - 1 ] );
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}
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}
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}
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#if 0
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Debug( LDAP_DEBUG_TRACE, "<== backsql_BindRowAsStrings()\n", 0, 0, 0 );
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#endif
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return rc;
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}
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RETCODE
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backsql_FreeRow( BACKSQL_ROW_NTS *row )
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{
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int i;
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if ( row->cols == NULL ) {
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return SQL_ERROR;
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}
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for ( i = 0; i < row->ncols; i++ ) {
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/*
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* FIXME: we need to free the col_names as well, don't we?
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*/
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free( row->cols[ i ] );
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}
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free( row->col_names );
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free( row->col_prec );
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free( row->cols );
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free( row->is_null );
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return SQL_SUCCESS;
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}
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int
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backsql_cmp_connid( backsql_db_conn *c1, backsql_db_conn *c2 )
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{
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if ( c1->ldap_cid > c2->ldap_cid ) {
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return 1;
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}
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if ( c1->ldap_cid < c2->ldap_cid ) {
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return -1;
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}
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return 0;
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}
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int
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backsql_close_db_conn( backsql_db_conn *conn )
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{
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Debug( LDAP_DEBUG_TRACE, "==>backsql_close_db_conn()\n", 0, 0, 0 );
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/* TimesTen */
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SQLTransact( SQL_NULL_HENV, conn->dbh, SQL_COMMIT );
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SQLDisconnect( conn->dbh );
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SQLFreeConnect( conn->dbh );
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Debug( LDAP_DEBUG_TRACE, "<==backsql_close_db_conn()\n", 0, 0, 0 );
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return 1;
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}
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int
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backsql_init_db_env( backsql_info *si )
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{
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RETCODE rc;
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Debug( LDAP_DEBUG_TRACE, "==>backsql_init_db_env()\n", 0, 0, 0 );
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rc = SQLAllocEnv( &si->db_env );
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if ( rc != SQL_SUCCESS ) {
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Debug( LDAP_DEBUG_TRACE, "init_db_env: SQLAllocEnv failed:\n",
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0, 0, 0 );
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backsql_PrintErrors( SQL_NULL_HENV, SQL_NULL_HDBC,
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SQL_NULL_HENV, rc );
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}
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Debug( LDAP_DEBUG_TRACE, "<==backsql_init_db_env()\n", 0, 0, 0 );
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return SQL_SUCCESS;
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}
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int
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backsql_free_db_env( backsql_info *si )
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{
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Debug( LDAP_DEBUG_TRACE, "==>backsql_free_db_env()\n", 0, 0, 0 );
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#if 0
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Debug( LDAP_DEBUG_TRACE, "free_db_env(): delete AVL tree here!!!\n",
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0, 0, 0 );
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#endif
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/*
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* stop, if frontend waits for all threads to shutdown
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* before calling this -- then what are we going to delete??
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* everything is already deleted...
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*/
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Debug( LDAP_DEBUG_TRACE, "<==backsql_free_db_env()\n", 0, 0, 0 );
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return SQL_SUCCESS;
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}
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backsql_db_conn *
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backsql_open_db_conn( backsql_info *si, int ldap_cid )
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{
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/* TimesTen */
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char DBMSName[ 32 ];
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backsql_db_conn *dbc;
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int rc;
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Debug( LDAP_DEBUG_TRACE, "==>backsql_open_db_conn()\n", 0, 0, 0 );
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dbc = (backsql_db_conn *)ch_calloc( 1, sizeof( backsql_db_conn ) );
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dbc->ldap_cid = ldap_cid;
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rc = SQLAllocConnect( si->db_env, &dbc->dbh );
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if (!BACKSQL_SUCCESS( rc ) ) {
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Debug( LDAP_DEBUG_TRACE, "backsql_open_db_conn: "
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"SQLAllocConnect() failed:\n", 0, 0, 0 );
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backsql_PrintErrors( si->db_env, SQL_NULL_HDBC,
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SQL_NULL_HENV, rc );
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return NULL;
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}
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rc = SQLConnect( dbc->dbh, si->dbname, SQL_NTS, si->dbuser,
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SQL_NTS, si->dbpasswd, SQL_NTS );
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if ( rc != SQL_SUCCESS ) {
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Debug( LDAP_DEBUG_TRACE, "backsql_open_db_conn: "
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"SQLConnect() to database '%s' as user '%s' "
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"%s:\n", si->dbname, si->dbuser,
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rc == SQL_SUCCESS_WITH_INFO ?
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"succeeded with info" : "failed" );
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backsql_PrintErrors( si->db_env, dbc->dbh, SQL_NULL_HENV, rc );
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if ( rc != SQL_SUCCESS_WITH_INFO ) {
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return NULL;
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}
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}
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/*
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* TimesTen : Turn off autocommit. We must explicitly
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* commit any transactions.
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*/
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SQLSetConnectOption( dbc->dbh, SQL_AUTOCOMMIT, SQL_AUTOCOMMIT_OFF );
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/*
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* See if this connection is to TimesTen. If it is,
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* remember that fact for later use.
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*/
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si->isTimesTen = 0; /* Assume until proven otherwise */
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DBMSName[ 0 ] = '\0';
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rc = SQLGetInfo( dbc->dbh, SQL_DBMS_NAME, (PTR)&DBMSName,
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sizeof( DBMSName ), NULL );
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if ( rc == SQL_SUCCESS ) {
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if ( strcmp( DBMSName, "TimesTen" ) == 0 ||
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strcmp( DBMSName, "Front-Tier" ) == 0 ) {
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Debug( LDAP_DEBUG_TRACE, "backsql_open_db_conn: "
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"TimesTen database!\n", 0, 0, 0 );
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si->isTimesTen = 1;
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}
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} else {
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Debug( LDAP_DEBUG_TRACE, "backsql_open_db_conn: "
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"SQLGetInfo() failed:\n", 0, 0, 0 );
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backsql_PrintErrors( si->db_env, dbc->dbh, SQL_NULL_HENV, rc );
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}
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/* end TimesTen */
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Debug( LDAP_DEBUG_TRACE, "backsql_open_db_conn(): "
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"connected, adding to tree\n", 0, 0, 0 );
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ldap_pvt_thread_mutex_lock( &si->dbconn_mutex );
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avl_insert( &si->db_conns, dbc, (AVL_CMP)backsql_cmp_connid,
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backsql_dummy );
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ldap_pvt_thread_mutex_unlock( &si->dbconn_mutex );
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Debug( LDAP_DEBUG_TRACE, "<==backsql_open_db_conn()\n", 0, 0, 0 );
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return dbc;
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}
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int
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backsql_free_db_conn( Backend *be, Connection *ldapc )
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{
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backsql_info *si = (backsql_info *)be->be_private;
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backsql_db_conn tmp, *conn;
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Debug( LDAP_DEBUG_TRACE, "==>backsql_free_db_conn()\n", 0, 0, 0 );
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tmp.ldap_cid = ldapc->c_connid;
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ldap_pvt_thread_mutex_lock( &si->dbconn_mutex );
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conn = (backsql_db_conn *)avl_delete( &si->db_conns, &tmp,
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(AVL_CMP)backsql_cmp_connid );
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ldap_pvt_thread_mutex_unlock( &si->dbconn_mutex );
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/*
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* we have one thread per connection, as I understand -- so we can
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* get this out of critical section
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*/
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if ( conn != NULL ) {
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Debug( LDAP_DEBUG_TRACE, "backsql_free_db_conn(): "
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"closing db connection\n", 0, 0, 0 );
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backsql_close_db_conn( conn );
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}
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Debug( LDAP_DEBUG_TRACE, "<==backsql_free_db_conn()\n", 0, 0, 0 );
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return SQL_SUCCESS;
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}
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SQLHDBC
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backsql_get_db_conn( Backend *be, Connection *ldapc )
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{
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backsql_info *si = (backsql_info *)be->be_private;
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backsql_db_conn *dbc;
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backsql_db_conn tmp;
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Debug( LDAP_DEBUG_TRACE, "==>backsql_get_db_conn()\n", 0, 0, 0 );
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tmp.ldap_cid = ldapc->c_connid;
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/*
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* we have one thread per connection, as I understand --
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* so we do not need locking here
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*/
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dbc = (backsql_db_conn *)avl_find( si->db_conns, &tmp,
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(AVL_CMP)backsql_cmp_connid );
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if ( !dbc ) {
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dbc = backsql_open_db_conn( si, ldapc->c_connid );
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}
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if ( !dbc ) {
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Debug( LDAP_DEBUG_TRACE, "backsql_get_db_conn(): "
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"could not get connection handle -- returning NULL\n",
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0, 0, 0 );
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return SQL_NULL_HDBC;
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}
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ldap_pvt_thread_mutex_lock( &si->schema_mutex );
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if ( !si->schema_loaded ) {
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Debug( LDAP_DEBUG_TRACE, "backsql_get_db_conn(): "
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"first call -- reading schema map\n", 0, 0, 0 );
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backsql_load_schema_map( si, dbc->dbh );
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}
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ldap_pvt_thread_mutex_unlock( &si->schema_mutex );
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Debug( LDAP_DEBUG_TRACE, "<==backsql_get_db_conn()\n", 0, 0, 0 );
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return dbc->dbh;
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}
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#endif /* SLAPD_SQL */
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