[net-next 2/3] UAPI: add MPLS label stack definition
From: Simon Wunderlich <hidden>
Date: 2014-02-12 10:53:05
Also in:
linux-wireless
Subsystem:
the rest · Maintainer:
Linus Torvalds
Labels for the Multiprotocol Label Switching are defined in RFC 3032 which was superseded by RFC 5462. Add the definition to UAPI. Signed-off-by: Simon Wunderlich <redacted> Signed-off-by: Mathias Kretschmer <redacted> --- include/uapi/linux/mpls.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 include/uapi/linux/mpls.h
diff --git a/include/uapi/linux/mpls.h b/include/uapi/linux/mpls.h
new file mode 100644
index 0000000..15c8260
--- /dev/null
+++ b/include/uapi/linux/mpls.h@@ -0,0 +1,34 @@ +#ifndef _UAPI_MPLS_H +#define _UAPI_MPLS_H + +#include <linux/types.h> +#include <asm/byteorder.h> + +/* 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 + */ + +struct mpls_label_stack { + __be32 entry; +}; + +#define MPLS_LS_LABEL_MASK 0xFFFFF000 +#define MPLS_LS_LABEL_SHIFT 12 +#define MPLS_LS_TC_MASK 0x00000E00 +#define MPLS_LS_TC_SHIFT 9 +#define MPLS_LS_S_MASK 0x00000100 +#define MPLS_LS_S_SHIFT 8 +#define MPLS_LS_TTL_MASK 0x000000FF +#define MPLS_LS_TTL_SHIFT 0 + +#endif /* _UAPI_MPLS_H */
--
1.7.10.4
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