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38 lines
1.1 KiB
Diff
38 lines
1.1 KiB
Diff
--- /dev/null
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+++ b/include/uapi/linux/mpls.h
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@@ -0,0 +1,34 @@
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+#ifndef _UAPI_MPLS_H
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+#define _UAPI_MPLS_H
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+
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+#include <linux/types.h>
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+#include <asm/byteorder.h>
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+
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+/* Reference: RFC 5462, RFC 3032
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+ *
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+ * 0 1 2 3
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+ * 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
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+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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+ * | Label | TC |S| TTL |
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+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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+ *
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+ * Label: Label Value, 20 bits
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+ * TC: Traffic Class field, 3 bits
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+ * S: Bottom of Stack, 1 bit
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+ * TTL: Time to Live, 8 bits
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+ */
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+
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+struct mpls_label {
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+ __be32 entry;
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+};
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+
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+#define MPLS_LS_LABEL_MASK 0xFFFFF000
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+#define MPLS_LS_LABEL_SHIFT 12
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+#define MPLS_LS_TC_MASK 0x00000E00
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+#define MPLS_LS_TC_SHIFT 9
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+#define MPLS_LS_S_MASK 0x00000100
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+#define MPLS_LS_S_SHIFT 8
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+#define MPLS_LS_TTL_MASK 0x000000FF
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+#define MPLS_LS_TTL_SHIFT 0
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+
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+#endif /* _UAPI_MPLS_H */
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