From 8daa83a594a2e98f39d764422bfbdbc62c9efd44 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 19:20:00 +0200
Subject: Adding upstream version 2:4.20.0+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 source3/registry/reg_cachehook.c | 147 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 147 insertions(+)
 create mode 100644 source3/registry/reg_cachehook.c

(limited to 'source3/registry/reg_cachehook.c')

diff --git a/source3/registry/reg_cachehook.c b/source3/registry/reg_cachehook.c
new file mode 100644
index 0000000..95e77cc
--- /dev/null
+++ b/source3/registry/reg_cachehook.c
@@ -0,0 +1,147 @@
+/* 
+ *  Unix SMB/CIFS implementation.
+ *  Virtual Windows Registry Layer
+ *  Copyright (C) Gerald Carter                     2002.
+ *  Copyright (C) Michael Adam                      2008
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *  
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *  
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Implementation of registry hook cache tree */
+
+#include "includes.h"
+#include "adt_tree.h"
+#include "registry.h"
+#include "reg_cachehook.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_REGISTRY
+
+static struct sorted_tree *cache_tree = NULL;
+extern struct registry_ops regdb_ops;		/* these are the default */
+
+static WERROR keyname_to_path(TALLOC_CTX *mem_ctx, const char *keyname,
+			      char **path)
+{
+	char *tmp_path = NULL;
+
+	if ((keyname == NULL) || (path == NULL)) {
+		return WERR_INVALID_PARAMETER;
+	}
+
+	tmp_path = talloc_asprintf(mem_ctx, "\\%s", keyname);
+	if (tmp_path == NULL) {
+		DEBUG(0, ("talloc_asprintf failed!\n"));
+		return WERR_NOT_ENOUGH_MEMORY;
+	}
+
+	*path = tmp_path;
+
+	return WERR_OK;
+}
+
+/**********************************************************************
+ Initialize the cache tree if it has not been initialized yet.
+ *********************************************************************/
+
+WERROR reghook_cache_init(void)
+{
+	if (cache_tree != NULL) {
+		return WERR_OK;
+	}
+
+	cache_tree = pathtree_init(&regdb_ops);
+	if (cache_tree == NULL) {
+		return WERR_NOT_ENOUGH_MEMORY;
+	}
+	DEBUG(10, ("reghook_cache_init: new tree with default "
+		   "ops %p for key [%s]\n", (void *)&regdb_ops,
+		   KEY_TREE_ROOT));
+	return WERR_OK;
+}
+
+/**********************************************************************
+ Add a new registry hook to the cache.  Note that the keyname
+ is not in the exact format that a struct sorted_tree expects.
+ *********************************************************************/
+
+WERROR reghook_cache_add(const char *keyname, struct registry_ops *ops)
+{
+	WERROR werr;
+	char *key = NULL;
+
+	if ((keyname == NULL) || (ops == NULL)) {
+		return WERR_INVALID_PARAMETER;
+	}
+
+	werr = keyname_to_path(talloc_tos(), keyname, &key);
+	if (!W_ERROR_IS_OK(werr)) {
+		goto done;
+	}
+
+	DEBUG(10, ("reghook_cache_add: Adding ops %p for key [%s]\n",
+		   (void *)ops, key));
+
+	if (!pathtree_add(cache_tree, key, ops))
+		werr = WERR_NOT_ENOUGH_MEMORY;
+	else
+		werr = WERR_OK;
+
+done:
+	TALLOC_FREE(key);
+	return werr;
+}
+
+/**********************************************************************
+ Find a key in the cache.
+ *********************************************************************/
+
+struct registry_ops *reghook_cache_find(const char *keyname)
+{
+	WERROR werr;
+	char *key = NULL;
+	struct registry_ops *ops = NULL;
+
+	if (keyname == NULL) {
+		return NULL;
+	}
+
+	werr = keyname_to_path(talloc_tos(), keyname, &key);
+	if (!W_ERROR_IS_OK(werr)) {
+		goto done;
+	}
+
+	DEBUG(10,("reghook_cache_find: Searching for keyname [%s]\n", key));
+
+	ops = (struct registry_ops *)pathtree_find(cache_tree, key);
+
+	DEBUG(10, ("reghook_cache_find: found ops %p for key [%s]\n",
+		   ops ? (void *)ops : 0, key));
+
+done:
+	TALLOC_FREE(key);
+
+	return ops;
+}
+
+/**********************************************************************
+ Print out the cache tree structure for debugging.
+ *********************************************************************/
+
+void reghook_dump_cache( int debuglevel )
+{
+	DEBUG(debuglevel,("reghook_dump_cache: Starting cache dump now...\n"));
+
+	pathtree_print_keys( cache_tree, debuglevel );
+}
-- 
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