1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
3 * SR-IPv6 implementation
6 * David Lebrun <david.lebrun@uclouvain.be>
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
15 #ifndef _UAPI_LINUX_SEG6_H
16 #define _UAPI_LINUX_SEG6_H
18 #include <linux/types.h>
19 #include <linux/in6.h> /* For struct in6_addr. */
29 __u8 first_segment; /* Represents the last_entry field of SRH */
33 struct in6_addr segments[];
36 #define SR6_FLAG1_PROTECTED (1 << 6)
37 #define SR6_FLAG1_OAM (1 << 5)
38 #define SR6_FLAG1_ALERT (1 << 4)
39 #define SR6_FLAG1_HMAC (1 << 3)
41 #define SR6_TLV_INGRESS 1
42 #define SR6_TLV_EGRESS 2
43 #define SR6_TLV_OPAQUE 3
44 #define SR6_TLV_PADDING 4
45 #define SR6_TLV_HMAC 5
47 #define sr_has_hmac(srh) ((srh)->flags & SR6_FLAG1_HMAC)