| 1 | /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
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| 2 | /* |
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| 3 | * SR-IPv6 implementation |
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| 4 | * |
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| 5 | * Author: |
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| 6 | * David Lebrun <david.lebrun@uclouvain.be> |
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| 7 | * |
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| 8 | * |
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| 9 | * This program is free software; you can redistribute it and/or |
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| 10 | * modify it under the terms of the GNU General Public License |
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| 11 | * as published by the Free Software Foundation; either version |
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| 12 | * 2 of the License, or (at your option) any later version. |
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| 13 | */ |
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| 14 | |
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| 15 | #ifndef _UAPI_LINUX_SEG6_H |
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| 16 | #define _UAPI_LINUX_SEG6_H |
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| 17 | |
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| 18 | #include <linux/types.h> |
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| 19 | #include <linux/in6.h> /* For struct in6_addr. */ |
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| 20 | |
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| 21 | /* |
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| 22 | * SRH |
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| 23 | */ |
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| 24 | struct ipv6_sr_hdr { |
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| 25 | __u8 nexthdr; |
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| 26 | __u8 hdrlen; |
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| 27 | __u8 type; |
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| 28 | __u8 segments_left; |
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| 29 | __u8 first_segment; /* Represents the last_entry field of SRH */ |
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| 30 | __u8 flags; |
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| 31 | __u16 tag; |
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| 32 | |
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| 33 | struct in6_addr segments[]; |
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| 34 | }; |
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| 35 | |
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| 36 | #define SR6_FLAG1_PROTECTED (1 << 6) |
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| 37 | #define SR6_FLAG1_OAM (1 << 5) |
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| 38 | #define SR6_FLAG1_ALERT (1 << 4) |
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| 39 | #define SR6_FLAG1_HMAC (1 << 3) |
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| 40 | |
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| 41 | #define SR6_TLV_INGRESS 1 |
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| 42 | #define SR6_TLV_EGRESS 2 |
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| 43 | #define SR6_TLV_OPAQUE 3 |
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| 44 | #define SR6_TLV_PADDING 4 |
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| 45 | #define SR6_TLV_HMAC 5 |
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| 46 | |
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| 47 | #define sr_has_hmac(srh) ((srh)->flags & SR6_FLAG1_HMAC) |
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| 48 | |
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| 49 | struct sr6_tlv { |
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| 50 | __u8 type; |
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| 51 | __u8 len; |
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| 52 | __u8 data[0]; |
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| 53 | }; |
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| 54 | |
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| 55 | #endif |
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| 56 | |
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