This commit was generated by cvs2svn to compensate for changes in r30,

which included commits to RCS files with non-trunk default branches.
(This used to be commit 3a69cffb062d4f1238b8cae10481c1f2ea4d3d8b)

1 files changed, 207 insertions, 0 deletions

diff --git a/source4/smbwrapper/smbw_cache.c b/source4/smbwrapper/smbw_cache.c
new file mode 100644
index 0000000000..fcb0eda805
--- /dev/null
+++ b/source4/smbwrapper/smbw_cache.c
@@ -0,0 +1,207 @@
+/* 
+   Unix SMB/CIFS implementation.
+   SMB wrapper directory functions
+   Copyright (C) Tim Potter 2000
+   
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+/* We cache lists of workgroups, lists of servers in workgroups, and lists
+   of shares exported by servers. */
+
+#define CACHE_TIMEOUT 30
+
+struct name_list {
+	struct name_list *prev, *next;
+	char *name;
+	uint32 stype;
+	char *comment;
+};
+
+struct cached_names {
+	struct cached_names *prev, *next;
+	char *key;
+	struct name_list *name_list;
+	time_t cache_timeout;
+	int result;
+};
+
+static struct cached_names *cached_names = NULL;
+
+/* Find a list of cached name for a workgroup, server or share list */
+
+static struct cached_names *find_cached_names(char *key)
+{
+	struct cached_names *tmp;
+
+	for (tmp = cached_names; tmp; tmp = tmp->next) {
+		if (strequal(tmp->key, key)) {
+			return tmp;
+		}
+	}
+
+	return NULL;
+}
+
+/* Add a name to a list stored in the state variable */
+
+static void add_cached_names(const char *name, uint32 stype, 
+			     const char *comment, void *state)
+{
+	struct name_list **name_list = (struct name_list **)state;
+	struct name_list *new_name;
+
+	new_name = (struct name_list *)malloc(sizeof(struct name_list));
+	if (!new_name) return;
+
+	ZERO_STRUCTP(new_name);
+
+	new_name->name = strdup(name);
+	new_name->stype = stype;
+	new_name->comment = strdup(comment);
+
+	DLIST_ADD(*name_list, new_name);
+}
+
+static void free_name_list(struct name_list *name_list)
+{
+	struct name_list *tmp = name_list;
+
+	while(tmp) {
+		struct name_list *next;
+
+		next = tmp->next;
+
+		SAFE_FREE(tmp->name);
+		SAFE_FREE(tmp->comment);
+		SAFE_FREE(tmp);
+		
+		tmp = next;
+	}
+}
+
+/* Wrapper for NetServerEnum function */
+
+BOOL smbw_NetServerEnum(struct cli_state *cli, char *workgroup, uint32 stype,
+			void (*fn)(const char *, uint32, const char *, void *),
+			void *state)
+{
+	struct cached_names *names;
+	struct name_list *tmp;
+	time_t now = time(NULL);
+	char key[PATH_MAX];
+	BOOL result = True;
+
+	slprintf(key, PATH_MAX - 1, "%s/%s#%s", cli->desthost, 
+		 workgroup, (stype == SV_TYPE_DOMAIN_ENUM ? "DOM" : "SRV"));
+
+	names = find_cached_names(key);
+
+	if (names == NULL || (now - names->cache_timeout) > CACHE_TIMEOUT) {
+		struct cached_names *new_names = NULL;
+
+		/* No names cached for this workgroup */
+
+		if (names == NULL) {
+			new_names = (struct cached_names *)
+				malloc(sizeof(struct cached_names));
+
+			ZERO_STRUCTP(new_names);
+			DLIST_ADD(cached_names, new_names);
+
+		} else {
+
+			/* Dispose of out of date name list */
+
+			free_name_list(names->name_list);
+			names->name_list = NULL;
+
+			new_names = names;
+		}		
+
+		result = cli_NetServerEnum(cli, workgroup, stype, 
+					   add_cached_names, 
+					   &new_names->name_list);
+					   
+		new_names->cache_timeout = now;
+		new_names->result = result;
+		new_names->key = strdup(key);
+
+		names = new_names;
+	}
+
+	/* Return names by running callback function. */
+
+	for (tmp = names->name_list; tmp; tmp = tmp->next)
+		fn(tmp->name, stype, tmp->comment, state);
+	
+	return names->result;
+}
+
+/* Wrapper for RNetShareEnum function */
+
+int smbw_RNetShareEnum(struct cli_state *cli, 
+		       void (*fn)(const char *, uint32, const char *, void *), 
+		       void *state)
+{
+	struct cached_names *names;
+	struct name_list *tmp;
+	time_t now = time(NULL);
+	char key[PATH_MAX];
+
+	slprintf(key, PATH_MAX - 1, "SHARE/%s", cli->desthost);
+
+	names = find_cached_names(key);
+
+	if (names == NULL || (now - names->cache_timeout) > CACHE_TIMEOUT) {
+		struct cached_names *new_names = NULL;
+
+		/* No names cached for this server */
+
+		if (names == NULL) {
+			new_names = (struct cached_names *)
+				malloc(sizeof(struct cached_names));
+
+			ZERO_STRUCTP(new_names);
+			DLIST_ADD(cached_names, new_names);
+
+		} else {
+
+			/* Dispose of out of date name list */
+
+			free_name_list(names->name_list);
+			names->name_list = NULL;
+
+			new_names = names;
+		}
+
+		new_names->result = cli_RNetShareEnum(cli, add_cached_names, 
+						      &new_names->name_list);
+		
+		new_names->cache_timeout = now;
+		new_names->key = strdup(key);
+
+		names = new_names;
+	}
+
+	/* Return names by running callback function. */
+
+	for (tmp = names->name_list; tmp; tmp = tmp->next)
+		fn(tmp->name, tmp->stype, tmp->comment, state);
+	
+	return names->result;
+}