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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 11:11:40 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 11:11:40 +0000
commit7731832751ab9f3c6ddeb66f186d3d7fa1934a6d (patch)
treee91015872543a59be2aad26c2fea02e41b57005d /libraries/librewrite/session.c
parentInitial commit. (diff)
downloadopenldap-7731832751ab9f3c6ddeb66f186d3d7fa1934a6d.tar.xz
openldap-7731832751ab9f3c6ddeb66f186d3d7fa1934a6d.zip
Adding upstream version 2.4.57+dfsg.upstream/2.4.57+dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'libraries/librewrite/session.c')
-rw-r--r--libraries/librewrite/session.c423
1 files changed, 423 insertions, 0 deletions
diff --git a/libraries/librewrite/session.c b/libraries/librewrite/session.c
new file mode 100644
index 0000000..6e2e048
--- /dev/null
+++ b/libraries/librewrite/session.c
@@ -0,0 +1,423 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2000-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* ACKNOWLEDGEMENT:
+ * This work was initially developed by Pierangelo Masarati for
+ * inclusion in OpenLDAP Software.
+ */
+
+#include <portable.h>
+
+#include "rewrite-int.h"
+
+/*
+ * Compares two cookies
+ */
+static int
+rewrite_cookie_cmp(
+ const void *c1,
+ const void *c2
+)
+{
+ const struct rewrite_session *s1, *s2;
+
+ s1 = ( const struct rewrite_session * )c1;
+ s2 = ( const struct rewrite_session * )c2;
+
+ assert( s1 != NULL );
+ assert( s2 != NULL );
+ assert( s1->ls_cookie != NULL );
+ assert( s2->ls_cookie != NULL );
+
+ return ( ( s1->ls_cookie < s2->ls_cookie ) ? -1 :
+ ( ( s1->ls_cookie > s2->ls_cookie ) ? 1 : 0 ) );
+}
+
+/*
+ * Duplicate cookies?
+ */
+static int
+rewrite_cookie_dup(
+ void *c1,
+ void *c2
+)
+{
+ struct rewrite_session *s1, *s2;
+
+ s1 = ( struct rewrite_session * )c1;
+ s2 = ( struct rewrite_session * )c2;
+
+ assert( s1 != NULL );
+ assert( s2 != NULL );
+ assert( s1->ls_cookie != NULL );
+ assert( s2->ls_cookie != NULL );
+
+ assert( s1->ls_cookie != s2->ls_cookie );
+
+ return ( ( s1->ls_cookie == s2->ls_cookie ) ? -1 : 0 );
+}
+
+/*
+ * Inits a session
+ */
+struct rewrite_session *
+rewrite_session_init(
+ struct rewrite_info *info,
+ const void *cookie
+)
+{
+ struct rewrite_session *session, tmp;
+ int rc;
+
+ assert( info != NULL );
+ assert( cookie != NULL );
+
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_wlock( &info->li_cookies_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+
+ tmp.ls_cookie = ( void * )cookie;
+ session = ( struct rewrite_session * )avl_find( info->li_cookies,
+ ( caddr_t )&tmp, rewrite_cookie_cmp );
+ if ( session ) {
+ session->ls_count++;
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+ return session;
+ }
+
+ session = calloc( sizeof( struct rewrite_session ), 1 );
+ if ( session == NULL ) {
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+ return NULL;
+ }
+ session->ls_cookie = ( void * )cookie;
+ session->ls_count = 1;
+
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ if ( ldap_pvt_thread_mutex_init( &session->ls_mutex ) ) {
+ free( session );
+ ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
+ return NULL;
+ }
+ if ( ldap_pvt_thread_rdwr_init( &session->ls_vars_mutex ) ) {
+ ldap_pvt_thread_mutex_destroy( &session->ls_mutex );
+ free( session );
+ ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
+ return NULL;
+ }
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+
+ rc = avl_insert( &info->li_cookies, ( caddr_t )session,
+ rewrite_cookie_cmp, rewrite_cookie_dup );
+ info->li_num_cookies++;
+
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+
+ if ( rc != 0 ) {
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_destroy( &session->ls_vars_mutex );
+ ldap_pvt_thread_mutex_destroy( &session->ls_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+
+ free( session );
+ return NULL;
+ }
+
+ return session;
+}
+
+/*
+ * Fetches a session
+ */
+struct rewrite_session *
+rewrite_session_find(
+ struct rewrite_info *info,
+ const void *cookie
+)
+{
+ struct rewrite_session *session, tmp;
+
+ assert( info != NULL );
+ assert( cookie != NULL );
+
+ tmp.ls_cookie = ( void * )cookie;
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_rlock( &info->li_cookies_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+ session = ( struct rewrite_session * )avl_find( info->li_cookies,
+ ( caddr_t )&tmp, rewrite_cookie_cmp );
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ if ( session ) {
+ ldap_pvt_thread_mutex_lock( &session->ls_mutex );
+ session->ls_count++;
+ }
+ ldap_pvt_thread_rdwr_runlock( &info->li_cookies_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+
+ return session;
+}
+
+/*
+ * Returns a session
+ */
+void
+rewrite_session_return(
+ struct rewrite_info *info,
+ struct rewrite_session *session
+)
+{
+ assert( session != NULL );
+ session->ls_count--;
+ ldap_pvt_thread_mutex_unlock( &session->ls_mutex );
+}
+
+/*
+ * Defines and inits a var with session scope
+ */
+int
+rewrite_session_var_set_f(
+ struct rewrite_info *info,
+ const void *cookie,
+ const char *name,
+ const char *value,
+ int flags
+)
+{
+ struct rewrite_session *session;
+ struct rewrite_var *var;
+
+ assert( info != NULL );
+ assert( cookie != NULL );
+ assert( name != NULL );
+ assert( value != NULL );
+
+ session = rewrite_session_find( info, cookie );
+ if ( session == NULL ) {
+ session = rewrite_session_init( info, cookie );
+ if ( session == NULL ) {
+ return REWRITE_ERR;
+ }
+
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_mutex_lock( &session->ls_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+ }
+
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_wlock( &session->ls_vars_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+
+ var = rewrite_var_find( session->ls_vars, name );
+ if ( var != NULL ) {
+ assert( var->lv_value.bv_val != NULL );
+
+ (void)rewrite_var_replace( var, value, flags );
+
+ } else {
+ var = rewrite_var_insert_f( &session->ls_vars, name, value, flags );
+ if ( var == NULL ) {
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_wunlock( &session->ls_vars_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+ rewrite_session_return( info, session );
+ return REWRITE_ERR;
+ }
+ }
+
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_wunlock( &session->ls_vars_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+
+ rewrite_session_return( info, session );
+
+ return REWRITE_SUCCESS;
+}
+
+/*
+ * Gets a var with session scope
+ */
+int
+rewrite_session_var_get(
+ struct rewrite_info *info,
+ const void *cookie,
+ const char *name,
+ struct berval *value
+)
+{
+ struct rewrite_session *session;
+ struct rewrite_var *var;
+ int rc = REWRITE_SUCCESS;
+
+ assert( info != NULL );
+ assert( cookie != NULL );
+ assert( name != NULL );
+ assert( value != NULL );
+
+ value->bv_val = NULL;
+ value->bv_len = 0;
+
+ if ( cookie == NULL ) {
+ return REWRITE_ERR;
+ }
+
+ session = rewrite_session_find( info, cookie );
+ if ( session == NULL ) {
+ return REWRITE_ERR;
+ }
+
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_rlock( &session->ls_vars_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+
+ var = rewrite_var_find( session->ls_vars, name );
+ if ( var != NULL ) {
+ value->bv_val = strdup( var->lv_value.bv_val );
+ value->bv_len = var->lv_value.bv_len;
+ }
+
+ if ( var == NULL || value->bv_val == NULL ) {
+ rc = REWRITE_ERR;
+ }
+
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_runlock( &session->ls_vars_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+
+ rewrite_session_return( info, session );
+
+ return rc;
+}
+
+static void
+rewrite_session_clean( void *v_session )
+{
+ struct rewrite_session *session = (struct rewrite_session *)v_session;
+
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_wlock( &session->ls_vars_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+
+ rewrite_var_delete( session->ls_vars );
+
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_wunlock( &session->ls_vars_mutex );
+ ldap_pvt_thread_rdwr_destroy( &session->ls_vars_mutex );
+ ldap_pvt_thread_mutex_unlock( &session->ls_mutex );
+ ldap_pvt_thread_mutex_destroy( &session->ls_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+}
+
+static void
+rewrite_session_free( void *v_session )
+{
+ struct rewrite_session *session = (struct rewrite_session *)v_session;
+
+ ldap_pvt_thread_mutex_lock( &session->ls_mutex );
+ rewrite_session_clean( v_session );
+ free( v_session );
+}
+
+/*
+ * Deletes a session
+ */
+int
+rewrite_session_delete(
+ struct rewrite_info *info,
+ const void *cookie
+)
+{
+ struct rewrite_session *session, tmp = { 0 };
+
+ assert( info != NULL );
+ assert( cookie != NULL );
+
+ session = rewrite_session_find( info, cookie );
+
+ if ( session == NULL ) {
+ return REWRITE_SUCCESS;
+ }
+
+ if ( --session->ls_count > 0 ) {
+ rewrite_session_return( info, session );
+ return REWRITE_SUCCESS;
+ }
+
+ rewrite_session_clean( session );
+
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_wlock( &info->li_cookies_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+
+ assert( info->li_num_cookies > 0 );
+ info->li_num_cookies--;
+
+ /*
+ * There is nothing to delete in the return value
+ */
+ tmp.ls_cookie = ( void * )cookie;
+ avl_delete( &info->li_cookies, ( caddr_t )&tmp, rewrite_cookie_cmp );
+
+ free( session );
+
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+
+ return REWRITE_SUCCESS;
+}
+
+/*
+ * Destroys the cookie tree
+ */
+int
+rewrite_session_destroy(
+ struct rewrite_info *info
+)
+{
+ int count;
+
+ assert( info != NULL );
+
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_wlock( &info->li_cookies_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+
+ /*
+ * Should call per-session destruction routine ...
+ */
+
+ count = avl_free( info->li_cookies, rewrite_session_free );
+ info->li_cookies = NULL;
+
+#if 0
+ fprintf( stderr, "count = %d; num_cookies = %d\n",
+ count, info->li_num_cookies );
+#endif
+
+ assert( count == info->li_num_cookies );
+ info->li_num_cookies = 0;
+
+#ifdef USE_REWRITE_LDAP_PVT_THREADS
+ ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
+#endif /* USE_REWRITE_LDAP_PVT_THREADS */
+
+ return REWRITE_SUCCESS;
+}
+