1 files changed, 97 insertions, 0 deletions
diff --git a/source3/smbd/connection.c b/source3/smbd/connection.c
new file mode 100644
index 0000000..8dea205
--- /dev/null
+++ b/source3/smbd/connection.c
@@ -0,0 +1,97 @@
+/* 
+   Unix SMB/CIFS implementation.
+   connection claim routines
+   Copyright (C) Andrew Tridgell 1998
+
+   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/>.
+*/
+
+#include "includes.h"
+#include "smbd/smbd.h"
+#include "smbd/globals.h"
+#include "dbwrap/dbwrap.h"
+#include "auth.h"
+#include "../lib/tsocket/tsocket.h"
+#include "messages.h"
+
+struct count_stat {
+	int curr_connections;
+	const char *name;
+	bool verify;
+};
+
+/****************************************************************************
+ Count the entries belonging to a service in the connection db.
+****************************************************************************/
+
+static int count_fn(struct smbXsrv_tcon_global0 *tcon,
+		    void *udp)
+{
+	struct count_stat *cs = (struct count_stat *)udp;
+
+	if (cs->verify && !process_exists(tcon->server_id)) {
+		return 0;
+	}
+
+	if (strequal(tcon->share_name, cs->name)) {
+		cs->curr_connections++;
+	}
+
+	return 0;
+}
+
+/****************************************************************************
+ Claim an entry in the connections database.
+****************************************************************************/
+
+int count_current_connections(const char *sharename, bool verify)
+{
+	struct count_stat cs;
+	NTSTATUS status;
+
+	cs.curr_connections = 0;
+	cs.name = sharename;
+	cs.verify = verify;
+
+	/*
+	 * This has a race condition, but locking the chain before hand is worse
+	 * as it leads to deadlock.
+	 */
+
+	status = smbXsrv_tcon_global_traverse(count_fn, &cs);
+
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0,("count_current_connections: traverse of "
+			 "smbXsrv_tcon_global.tdb failed - %s\n",
+			 nt_errstr(status)));
+		return 0;
+	}
+
+	return cs.curr_connections;
+}
+
+bool connections_snum_used(struct smbd_server_connection *unused, int snum)
+{
+	const struct loadparm_substitution *lp_sub =
+		loadparm_s3_global_substitution();
+	int active;
+
+	active = count_current_connections(lp_servicename(talloc_tos(), lp_sub, snum),
+					   true);
+	if (active > 0) {
+		return true;
+	}
+
+	return false;
+}