1 /* 2 * SR-IPv6 implementation 3 * 4 * Author: 5 * David Lebrun <[email protected]> 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 #include <linux/types.h> 18 19 /* 20 * SRH 21 */ 22 struct ipv6_sr_hdr { 23 __u8 nexthdr; 24 __u8 hdrlen; 25 __u8 type; 26 __u8 segments_left; 27 __u8 first_segment; 28 __u8 flags; 29 __u16 reserved; 30 31 struct in6_addr segments[0]; 32 }; 33 34 #define SR6_FLAG1_PROTECTED (1 << 6) 35 #define SR6_FLAG1_OAM (1 << 5) 36 #define SR6_FLAG1_ALERT (1 << 4) 37 #define SR6_FLAG1_HMAC (1 << 3) 38 39 #define SR6_TLV_INGRESS 1 40 #define SR6_TLV_EGRESS 2 41 #define SR6_TLV_OPAQUE 3 42 #define SR6_TLV_PADDING 4 43 #define SR6_TLV_HMAC 5 44 45 #define sr_has_hmac(srh) ((srh)->flags & SR6_FLAG1_HMAC) 46 47 struct sr6_tlv { 48 __u8 type; 49 __u8 len; 50 __u8 data[0]; 51 }; 52 53 #endif 54