56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/*
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* SR-IPv6 implementation
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*
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* Author:
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* David Lebrun <david.lebrun@uclouvain.be>
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _LINUX_SEG6_H
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#define _LINUX_SEG6_H
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#include <linux/types.h>
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#include <linux/in6.h> /* For struct in6_addr. */
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/*
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* SRH
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*/
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struct ipv6_sr_hdr {
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__u8 nexthdr;
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__u8 hdrlen;
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__u8 type;
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__u8 segments_left;
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__u8 first_segment; /* Represents the last_entry field of SRH */
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__u8 flags;
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__u16 tag;
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struct in6_addr segments[0];
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};
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#define SR6_FLAG1_PROTECTED (1 << 6)
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#define SR6_FLAG1_OAM (1 << 5)
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#define SR6_FLAG1_ALERT (1 << 4)
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#define SR6_FLAG1_HMAC (1 << 3)
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#define SR6_TLV_INGRESS 1
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#define SR6_TLV_EGRESS 2
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#define SR6_TLV_OPAQUE 3
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#define SR6_TLV_PADDING 4
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#define SR6_TLV_HMAC 5
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#define sr_has_hmac(srh) ((srh)->flags & SR6_FLAG1_HMAC)
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struct sr6_tlv {
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__u8 type;
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__u8 len;
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__u8 data[0];
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};
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#endif
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