1 files changed, 33 insertions, 0 deletions
diff --git a/vnet/vnet/l2tp/packet.h b/vnet/vnet/l2tp/packet.h
new file mode 100644
index 00000000000..88acba41d4b
--- /dev/null
+++ b/vnet/vnet/l2tp/packet.h
@@ -0,0 +1,33 @@
+/*
+ * packet.h : L2TPv3 packet header format
+ *
+ * Copyright (c) 2013 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __included_l2tp_packet_h__
+#define __included_l2tp_packet_h__
+
+/* 
+ * See RFC4719 for packet format.
+ * Note: the l2_specific_sublayer is present in current Linux l2tpv3
+ * tunnels. It is not present in IOS XR l2tpv3 tunnels.
+ * The Linux implementation is almost certainly wrong.
+ */
+typedef CLIB_PACKED(struct {
+    u32 session_id;
+    u64 cookie;
+    u32 l2_specific_sublayer;   /* set to 0 (if present) */
+}) l2tpv3_header_t;
+
+#endif /* __included_l2tp_packet_h__ */