messaging: Define a binary format for message headers

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>

1 files changed, 41 insertions, 0 deletions

diff --git a/source3/lib/messages_util.c b/source3/lib/messages_util.c
new file mode 100644
index 0000000000..24c364c145
--- /dev/null
+++ b/source3/lib/messages_util.c
@@ -0,0 +1,41 @@
+/*
+ * Unix SMB/CIFS implementation.
+ * Samba internal messaging functions
+ * Copyright (C) 2013 by Volker Lendecke
+ *
+ * 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 "replace.h"
+#include "lib/util/samba_util.h"
+#include "librpc/gen_ndr/server_id.h"
+#include "lib/util/byteorder.h"
+#include "messages_util.h"
+
+void message_hdr_put(uint8_t buf[MESSAGE_HDR_LENGTH], uint32_t msg_type,
+		     struct server_id src, struct server_id dst)
+{
+	server_id_put(buf, dst);
+	server_id_put(buf + 24, src);
+	SIVAL(buf, 48, msg_type);
+}
+
+void message_hdr_get(uint32_t *msg_type, struct server_id *src,
+		     struct server_id *dst,
+		     const uint8_t buf[MESSAGE_HDR_LENGTH])
+{
+	server_id_get(dst, buf);
+	server_id_get(src, buf + 24);
+	*msg_type = IVAL(buf, 48);
+}