1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linu 1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2 /* 2 /*
3 * SR-IPv6 implementation 3 * SR-IPv6 implementation
4 * 4 *
5 * Author: 5 * Author:
6 * David Lebrun <david.lebrun@uclouvain.be> 6 * David Lebrun <david.lebrun@uclouvain.be>
7 * 7 *
8 * 8 *
9 * This program is free software; you can red 9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU G 10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foun 11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) 12 * 2 of the License, or (at your option) any later version.
13 */ 13 */
14 14
15 #ifndef _UAPI_LINUX_SEG6_H 15 #ifndef _UAPI_LINUX_SEG6_H
16 #define _UAPI_LINUX_SEG6_H 16 #define _UAPI_LINUX_SEG6_H
17 17
18 #include <linux/types.h> 18 #include <linux/types.h>
19 #include <linux/in6.h> /* For struct 19 #include <linux/in6.h> /* For struct in6_addr. */
20 20
21 /* 21 /*
22 * SRH 22 * SRH
23 */ 23 */
24 struct ipv6_sr_hdr { 24 struct ipv6_sr_hdr {
25 __u8 nexthdr; 25 __u8 nexthdr;
26 __u8 hdrlen; 26 __u8 hdrlen;
27 __u8 type; 27 __u8 type;
28 __u8 segments_left; 28 __u8 segments_left;
29 __u8 first_segment; /* Represents t 29 __u8 first_segment; /* Represents the last_entry field of SRH */
30 __u8 flags; 30 __u8 flags;
31 __u16 tag; 31 __u16 tag;
32 32
33 struct in6_addr segments[]; 33 struct in6_addr segments[];
34 }; 34 };
35 35
36 #define SR6_FLAG1_PROTECTED (1 << 6) 36 #define SR6_FLAG1_PROTECTED (1 << 6)
37 #define SR6_FLAG1_OAM (1 << 5) 37 #define SR6_FLAG1_OAM (1 << 5)
38 #define SR6_FLAG1_ALERT (1 << 4) 38 #define SR6_FLAG1_ALERT (1 << 4)
39 #define SR6_FLAG1_HMAC (1 << 3) 39 #define SR6_FLAG1_HMAC (1 << 3)
40 40
41 #define SR6_TLV_INGRESS 1 41 #define SR6_TLV_INGRESS 1
42 #define SR6_TLV_EGRESS 2 42 #define SR6_TLV_EGRESS 2
43 #define SR6_TLV_OPAQUE 3 43 #define SR6_TLV_OPAQUE 3
44 #define SR6_TLV_PADDING 4 44 #define SR6_TLV_PADDING 4
45 #define SR6_TLV_HMAC 5 45 #define SR6_TLV_HMAC 5
46 46
47 #define sr_has_hmac(srh) ((srh)->flags & SR6_F 47 #define sr_has_hmac(srh) ((srh)->flags & SR6_FLAG1_HMAC)
48 48
49 struct sr6_tlv { 49 struct sr6_tlv {
50 __u8 type; 50 __u8 type;
51 __u8 len; 51 __u8 len;
52 __u8 data[]; 52 __u8 data[];
53 }; 53 };
54 54
55 #endif 55 #endif
56 56
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