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f3baa393ff
Labels for the Multiprotocol Label Switching are defined in RFC 3032 which was superseded by RFC 5462.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>
35 lines
993 B
C
35 lines
993 B
C
#ifndef _UAPI_MPLS_H
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#define _UAPI_MPLS_H
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#include <linux/types.h>
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#include <asm/byteorder.h>
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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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struct mpls_label {
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__be32 entry;
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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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#endif /* _UAPI_MPLS_H */
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