1*4dc78e53SAndroid Build Coastguard Worker /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2*4dc78e53SAndroid Build Coastguard Worker /* 3*4dc78e53SAndroid Build Coastguard Worker * SR-IPv6 implementation 4*4dc78e53SAndroid Build Coastguard Worker * 5*4dc78e53SAndroid Build Coastguard Worker * Author: 6*4dc78e53SAndroid Build Coastguard Worker * David Lebrun <[email protected]> 7*4dc78e53SAndroid Build Coastguard Worker * 8*4dc78e53SAndroid Build Coastguard Worker * 9*4dc78e53SAndroid Build Coastguard Worker * This program is free software; you can redistribute it and/or 10*4dc78e53SAndroid Build Coastguard Worker * modify it under the terms of the GNU General Public License 11*4dc78e53SAndroid Build Coastguard Worker * as published by the Free Software Foundation; either version 12*4dc78e53SAndroid Build Coastguard Worker * 2 of the License, or (at your option) any later version. 13*4dc78e53SAndroid Build Coastguard Worker */ 14*4dc78e53SAndroid Build Coastguard Worker 15*4dc78e53SAndroid Build Coastguard Worker #ifndef _LINUX_SEG6_H 16*4dc78e53SAndroid Build Coastguard Worker #define _LINUX_SEG6_H 17*4dc78e53SAndroid Build Coastguard Worker 18*4dc78e53SAndroid Build Coastguard Worker #include <linux/types.h> 19*4dc78e53SAndroid Build Coastguard Worker #include <linux/in6.h> /* For struct in6_addr. */ 20*4dc78e53SAndroid Build Coastguard Worker 21*4dc78e53SAndroid Build Coastguard Worker /* 22*4dc78e53SAndroid Build Coastguard Worker * SRH 23*4dc78e53SAndroid Build Coastguard Worker */ 24*4dc78e53SAndroid Build Coastguard Worker struct ipv6_sr_hdr { 25*4dc78e53SAndroid Build Coastguard Worker __u8 nexthdr; 26*4dc78e53SAndroid Build Coastguard Worker __u8 hdrlen; 27*4dc78e53SAndroid Build Coastguard Worker __u8 type; 28*4dc78e53SAndroid Build Coastguard Worker __u8 segments_left; 29*4dc78e53SAndroid Build Coastguard Worker __u8 first_segment; /* Represents the last_entry field of SRH */ 30*4dc78e53SAndroid Build Coastguard Worker __u8 flags; 31*4dc78e53SAndroid Build Coastguard Worker __u16 tag; 32*4dc78e53SAndroid Build Coastguard Worker 33*4dc78e53SAndroid Build Coastguard Worker struct in6_addr segments[]; 34*4dc78e53SAndroid Build Coastguard Worker }; 35*4dc78e53SAndroid Build Coastguard Worker 36*4dc78e53SAndroid Build Coastguard Worker #define SR6_FLAG1_PROTECTED (1 << 6) 37*4dc78e53SAndroid Build Coastguard Worker #define SR6_FLAG1_OAM (1 << 5) 38*4dc78e53SAndroid Build Coastguard Worker #define SR6_FLAG1_ALERT (1 << 4) 39*4dc78e53SAndroid Build Coastguard Worker #define SR6_FLAG1_HMAC (1 << 3) 40*4dc78e53SAndroid Build Coastguard Worker 41*4dc78e53SAndroid Build Coastguard Worker #define SR6_TLV_INGRESS 1 42*4dc78e53SAndroid Build Coastguard Worker #define SR6_TLV_EGRESS 2 43*4dc78e53SAndroid Build Coastguard Worker #define SR6_TLV_OPAQUE 3 44*4dc78e53SAndroid Build Coastguard Worker #define SR6_TLV_PADDING 4 45*4dc78e53SAndroid Build Coastguard Worker #define SR6_TLV_HMAC 5 46*4dc78e53SAndroid Build Coastguard Worker 47*4dc78e53SAndroid Build Coastguard Worker #define sr_has_hmac(srh) ((srh)->flags & SR6_FLAG1_HMAC) 48*4dc78e53SAndroid Build Coastguard Worker 49*4dc78e53SAndroid Build Coastguard Worker struct sr6_tlv { 50*4dc78e53SAndroid Build Coastguard Worker __u8 type; 51*4dc78e53SAndroid Build Coastguard Worker __u8 len; 52*4dc78e53SAndroid Build Coastguard Worker __u8 data[0]; 53*4dc78e53SAndroid Build Coastguard Worker }; 54*4dc78e53SAndroid Build Coastguard Worker 55*4dc78e53SAndroid Build Coastguard Worker #endif 56