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