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-rw-r--r--vnet/vnet/mpls-gre/packet.h49
1 files changed, 49 insertions, 0 deletions
diff --git a/vnet/vnet/mpls-gre/packet.h b/vnet/vnet/mpls-gre/packet.h
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index 00000000000..baa01818f09
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+++ b/vnet/vnet/mpls-gre/packet.h
@@ -0,0 +1,49 @@
+#ifndef included_vnet_mpls_packet_h
+#define included_vnet_mpls_packet_h
+
+/*
+ * MPLS packet format
+ *
+ * Copyright (c) 2012 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.
+ */
+
+typedef struct {
+ /* Label: top 20 bits [in network byte order] */
+ /* Experimental: 3 bits ... */
+ /* S (bottom of label stack): 1 bit */
+ /* TTL: 8 bits */
+ u32 label_exp_s_ttl;
+} mpls_unicast_header_t;
+
+static inline u32 vnet_mpls_uc_get_label (u32 label_exp_s_ttl)
+{
+ return (label_exp_s_ttl>>12);
+}
+
+static inline u32 vnet_mpls_uc_get_exp (u32 label_exp_s_ttl)
+{
+ return ((label_exp_s_ttl>>9) & 0x7);
+}
+
+static inline u32 vnet_mpls_uc_get_s (u32 label_exp_s_ttl)
+{
+ return ((label_exp_s_ttl>>8) & 0x1);
+}
+
+static inline u32 vnet_mpls_uc_get_ttl (u32 label_exp_s_ttl)
+{
+ return (label_exp_s_ttl & 0xff);
+}
+
+#endif /* included_vnet_mpls_packet_h */