mirror of
https://git.openldap.org/openldap/openldap.git
synced 2024-12-27 03:20:22 +08:00
421 lines
9.5 KiB
C
421 lines
9.5 KiB
C
/* $OpenLDAP$ */
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/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
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*
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* Copyright 2000-2008 The OpenLDAP Foundation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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/* ACKNOWLEDGEMENT:
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* This work was initially developed by Pierangelo Masarati for
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* inclusion in OpenLDAP Software.
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*/
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#include <portable.h>
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#include "rewrite-int.h"
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/*
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* Compares two cookies
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*/
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static int
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rewrite_cookie_cmp(
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const void *c1,
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const void *c2
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)
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{
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const struct rewrite_session *s1, *s2;
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s1 = ( const struct rewrite_session * )c1;
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s2 = ( const struct rewrite_session * )c2;
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assert( s1 != NULL );
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assert( s2 != NULL );
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assert( s1->ls_cookie != NULL );
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assert( s2->ls_cookie != NULL );
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return ( ( s1->ls_cookie < s2->ls_cookie ) ? -1 :
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( ( s1->ls_cookie > s2->ls_cookie ) ? 1 : 0 ) );
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}
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/*
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* Duplicate cookies?
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*/
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static int
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rewrite_cookie_dup(
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void *c1,
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void *c2
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)
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{
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struct rewrite_session *s1, *s2;
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s1 = ( struct rewrite_session * )c1;
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s2 = ( struct rewrite_session * )c2;
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assert( s1 != NULL );
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assert( s2 != NULL );
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assert( s1->ls_cookie != NULL );
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assert( s2->ls_cookie != NULL );
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assert( s1->ls_cookie != s2->ls_cookie );
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return ( ( s1->ls_cookie == s2->ls_cookie ) ? -1 : 0 );
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}
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/*
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* Inits a session
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*/
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struct rewrite_session *
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rewrite_session_init(
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struct rewrite_info *info,
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const void *cookie
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)
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{
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struct rewrite_session *session, tmp;
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int rc;
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assert( info != NULL );
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assert( cookie != NULL );
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_wlock( &info->li_cookies_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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tmp.ls_cookie = ( void * )cookie;
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session = ( struct rewrite_session * )avl_find( info->li_cookies,
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( caddr_t )&tmp, rewrite_cookie_cmp );
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if ( session ) {
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session->ls_count++;
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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return session;
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}
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session = calloc( sizeof( struct rewrite_session ), 1 );
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if ( session == NULL ) {
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return NULL;
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}
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session->ls_cookie = ( void * )cookie;
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session->ls_count = 1;
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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if ( ldap_pvt_thread_mutex_init( &session->ls_mutex ) ) {
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free( session );
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return NULL;
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}
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if ( ldap_pvt_thread_rdwr_init( &session->ls_vars_mutex ) ) {
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ldap_pvt_thread_mutex_destroy( &session->ls_mutex );
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free( session );
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return NULL;
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}
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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rc = avl_insert( &info->li_cookies, ( caddr_t )session,
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rewrite_cookie_cmp, rewrite_cookie_dup );
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info->li_num_cookies++;
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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if ( rc != 0 ) {
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_destroy( &session->ls_vars_mutex );
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ldap_pvt_thread_mutex_destroy( &session->ls_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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free( session );
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return NULL;
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}
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return session;
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}
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/*
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* Fetches a session
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*/
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struct rewrite_session *
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rewrite_session_find(
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struct rewrite_info *info,
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const void *cookie
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)
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{
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struct rewrite_session *session, tmp;
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assert( info != NULL );
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assert( cookie != NULL );
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tmp.ls_cookie = ( void * )cookie;
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_rlock( &info->li_cookies_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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session = ( struct rewrite_session * )avl_find( info->li_cookies,
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( caddr_t )&tmp, rewrite_cookie_cmp );
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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if ( session ) {
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ldap_pvt_thread_mutex_lock( &session->ls_mutex );
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}
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ldap_pvt_thread_rdwr_runlock( &info->li_cookies_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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return session;
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}
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/*
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* Returns a session
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*/
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void
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rewrite_session_return(
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struct rewrite_info *info,
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struct rewrite_session *session
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)
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{
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assert( session != NULL );
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ldap_pvt_thread_mutex_unlock( &session->ls_mutex );
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}
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/*
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* Defines and inits a var with session scope
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*/
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int
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rewrite_session_var_set_f(
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struct rewrite_info *info,
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const void *cookie,
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const char *name,
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const char *value,
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int flags
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)
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{
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struct rewrite_session *session;
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struct rewrite_var *var;
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assert( info != NULL );
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assert( cookie != NULL );
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assert( name != NULL );
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assert( value != NULL );
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session = rewrite_session_find( info, cookie );
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if ( session == NULL ) {
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session = rewrite_session_init( info, cookie );
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if ( session == NULL ) {
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return REWRITE_ERR;
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}
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_mutex_lock( &session->ls_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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}
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_wlock( &session->ls_vars_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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var = rewrite_var_find( session->ls_vars, name );
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if ( var != NULL ) {
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assert( var->lv_value.bv_val != NULL );
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(void)rewrite_var_replace( var, value, flags );
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} else {
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var = rewrite_var_insert_f( &session->ls_vars, name, value, flags );
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if ( var == NULL ) {
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_wunlock( &session->ls_vars_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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rewrite_session_return( info, session );
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return REWRITE_ERR;
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}
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}
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_wunlock( &session->ls_vars_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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rewrite_session_return( info, session );
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return REWRITE_SUCCESS;
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}
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/*
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* Gets a var with session scope
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*/
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int
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rewrite_session_var_get(
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struct rewrite_info *info,
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const void *cookie,
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const char *name,
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struct berval *value
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)
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{
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struct rewrite_session *session;
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struct rewrite_var *var;
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assert( info != NULL );
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assert( cookie != NULL );
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assert( name != NULL );
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assert( value != NULL );
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value->bv_val = NULL;
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value->bv_len = 0;
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if ( cookie == NULL ) {
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return REWRITE_ERR;
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}
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session = rewrite_session_find( info, cookie );
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if ( session == NULL ) {
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return REWRITE_ERR;
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}
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_rlock( &session->ls_vars_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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var = rewrite_var_find( session->ls_vars, name );
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if ( var == NULL ) {
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_runlock( &session->ls_vars_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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rewrite_session_return( info, session );
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return REWRITE_ERR;
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} else {
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value->bv_val = strdup( var->lv_value.bv_val );
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value->bv_len = var->lv_value.bv_len;
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}
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_runlock( &session->ls_vars_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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rewrite_session_return( info, session );
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return REWRITE_SUCCESS;
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}
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static void
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rewrite_session_clean( void *v_session )
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{
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struct rewrite_session *session = (struct rewrite_session *)v_session;
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_wlock( &session->ls_vars_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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rewrite_var_delete( session->ls_vars );
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_wunlock( &session->ls_vars_mutex );
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ldap_pvt_thread_rdwr_destroy( &session->ls_vars_mutex );
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ldap_pvt_thread_mutex_unlock( &session->ls_mutex );
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ldap_pvt_thread_mutex_destroy( &session->ls_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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}
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static void
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rewrite_session_free( void *v_session )
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{
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struct rewrite_session *session = (struct rewrite_session *)v_session;
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ldap_pvt_thread_mutex_lock( &session->ls_mutex );
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rewrite_session_clean( v_session );
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free( v_session );
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}
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/*
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* Deletes a session
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*/
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int
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rewrite_session_delete(
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struct rewrite_info *info,
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const void *cookie
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)
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{
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struct rewrite_session *session, tmp = { 0 };
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assert( info != NULL );
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assert( cookie != NULL );
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session = rewrite_session_find( info, cookie );
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if ( session == NULL ) {
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return REWRITE_SUCCESS;
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}
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if ( --session->ls_count > 0 ) {
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rewrite_session_return( info, session );
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return REWRITE_SUCCESS;
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}
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rewrite_session_clean( session );
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_wlock( &info->li_cookies_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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assert( info->li_num_cookies > 0 );
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info->li_num_cookies--;
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/*
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* There is nothing to delete in the return value
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*/
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tmp.ls_cookie = ( void * )cookie;
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avl_delete( &info->li_cookies, ( caddr_t )&tmp, rewrite_cookie_cmp );
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free( session );
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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return REWRITE_SUCCESS;
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}
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/*
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* Destroys the cookie tree
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*/
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int
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rewrite_session_destroy(
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struct rewrite_info *info
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)
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{
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int count;
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assert( info != NULL );
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_wlock( &info->li_cookies_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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/*
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* Should call per-session destruction routine ...
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*/
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count = avl_free( info->li_cookies, rewrite_session_free );
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info->li_cookies = NULL;
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#if 0
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fprintf( stderr, "count = %d; num_cookies = %d\n",
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count, info->li_num_cookies );
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#endif
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assert( count == info->li_num_cookies );
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info->li_num_cookies = 0;
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#ifdef USE_REWRITE_LDAP_PVT_THREADS
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ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
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#endif /* USE_REWRITE_LDAP_PVT_THREADS */
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return REWRITE_SUCCESS;
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}
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