datapath-windows: Support for OVS_KEY_ATTR_MPLS attribute

[cascardo/ovs.git] / datapath-windows / ovsext / Mpls.h

diff --git a/datapath-windows/ovsext/Mpls.h b/datapath-windows/ovsext/Mpls.h
new file mode 100644 (file)
index 0000000..6e53e46
--- /dev/null
+++ b/datapath-windows/ovsext/Mpls.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2015 Cloudbase Solutions Srl
+ *
+ * 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 __MPLS_H_
+#define __MPLS_H_ 1
+
+#include "precomp.h"
+#include "Ethernet.h"
+
+/*
+ * MPLS definitions
+ */
+#define FLOW_MAX_MPLS_LABELS    3
+
+#define MPLS_HLEN               4
+#define MPLS_BOS_MASK           0x00000100
+
+/* Reference: RFC 5462, RFC 3032
+ *
+ *  0                   1                   2                   3
+ *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                Label                  | TC  |S|       TTL     |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ *     Label:  Label Value, 20 bits
+ *     TC:     Traffic Class field, 3 bits
+ *     S:      Bottom of Stack, 1 bit
+ *     TTL:    Time to Live, 8 bits
+ */
+
+typedef struct MPLSHdr {
+    ovs_be32 lse;
+} MPLSHdr;
+
+__inline BOOLEAN
+OvsEthertypeIsMpls(ovs_be16 ethertype)
+{
+    return ethertype == htons(ETH_TYPE_MPLS) ||
+           ethertype == htons(ETH_TYPE_MPLS_MCAST);
+}
+
+#endif /* __MPLS_H_ */