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