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| author |   Simon Wunderlich <sw@simonwunderlich.de> | 2014-03-03 17:23:11 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-03-04 13:51:06 -0500 |
| commit | f3baa393ffc9a7aefc0bf767729382085e81f606 (patch) | |
| tree | 6bf5a38a317f5f8a0f9253b347e97d26ede4e92c /include/uapi/linux/mpls.h | |
| parent | if_ether.h: add IEEE 802.21 Ethertype (diff) | |
| download | linux-dev-f3baa393ffc9a7aefc0bf767729382085e81f606.tar.xz linux-dev-f3baa393ffc9a7aefc0bf767729382085e81f606.zip | |
UAPI: add MPLS label stack definition
Labels for the Multiprotocol Label Switching are defined in RFC 3032
which was superseded by RFC 5462. Add the definition to UAPI and a stub
header for include/linux.
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi/linux/mpls.h')
| -rw-r--r-- | include/uapi/linux/mpls.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/uapi/linux/mpls.h b/include/uapi/linux/mpls.h new file mode 100644 index 000000000000..bc9abfe88c9a --- /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 { + __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 */ |