r22761: This introduces lib/conn_tdb.c with two main functions: connections_traverse

and connections_forall. This centralizes all the routines that did individual
tdb_open("connections.tdb") and direct tdb_traverse.

Volker
(This used to be commit e43e94cda1ad8876b3cb5d1129080b57fa6ec214)

1 files changed, 109 insertions, 0 deletions

diff --git a/source3/lib/conn_tdb.c b/source3/lib/conn_tdb.c
new file mode 100644
index 0000000000..e6f491bbfb
--- /dev/null
+++ b/source3/lib/conn_tdb.c
@@ -0,0 +1,109 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Low-level connections.tdb access functions
+   Copyright (C) Volker Lendecke 2007
+   
+   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"
+
+TDB_CONTEXT *conn_tdb_ctx(BOOL rw)
+{
+	static TDB_CONTEXT *tdb;
+
+	if (tdb != NULL) {
+		return tdb;
+	}
+
+	if (rw) {
+		tdb = tdb_open_log(lock_path("connections.tdb"), 0,
+				   TDB_CLEAR_IF_FIRST|TDB_DEFAULT, 
+				   O_RDWR | O_CREAT, 0644);
+	}
+	else {
+		tdb = tdb_open_log(lock_path("connections.tdb"), 0,
+				   TDB_DEFAULT, O_RDONLY, 0);
+	}
+
+	if (tdb == NULL) {
+		DEBUG(0, ("Could not open connections.tdb: %s\n",
+			  strerror(errno)));
+	}
+
+	return tdb;
+}
+
+struct conn_traverse_state {
+	int (*fn)(TDB_CONTEXT *tdb,
+		  const struct connections_key *key,
+		  const struct connections_data *data,
+		  void *private_data);
+	void *private_data;
+};
+
+static int conn_traverse_fn(TDB_CONTEXT *tdb, TDB_DATA key,
+			    TDB_DATA data, void *private_data)
+{
+	struct conn_traverse_state *state =
+		(struct conn_traverse_state *)private_data;
+
+	if ((key.dsize != sizeof(struct connections_key))
+	    || (data.dsize != sizeof(struct connections_data))) {
+		return 0;
+	}
+
+	return state->fn(
+		tdb, (const struct connections_key *)key.dptr,
+		(const struct connections_data *)data.dptr,
+		state->private_data);
+}
+
+int connections_traverse(int (*fn)(TDB_CONTEXT *tdb, TDB_DATA key,
+				   TDB_DATA data, void *private_data),
+			 void *private_data)
+{
+	TDB_CONTEXT *tdb = conn_tdb_ctx(True);
+
+	if (tdb == NULL) {
+		DEBUG(5, ("Could not open connections.tdb r/w, trying r/o\n"));
+		tdb = conn_tdb_ctx(False);
+	}
+
+	if (tdb == NULL) {
+		return -1;
+	}
+
+	return tdb_traverse(tdb, fn, private_data);
+}
+
+int connections_forall(int (*fn)(TDB_CONTEXT *tdb,
+				 const struct connections_key *key,
+				 const struct connections_data *data,
+				 void *private_data),
+		       void *private_data)
+{
+	struct conn_traverse_state state;
+
+	state.fn = fn;
+	state.private_data = private_data;
+
+	return connections_traverse(conn_traverse_fn, (void *)&state);
+}
+
+BOOL connections_init(BOOL rw)
+{
+	return (conn_tdb_ctx(rw) != NULL);
+}