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_IPTUNNEL_H 15 #define _UAPI_LINUX_SEG6_IPTUNNEL_H 16 17 enum { 18 SEG6_IPTUNNEL_UNSPEC, 19 SEG6_IPTUNNEL_SRH, 20 __SEG6_IPTUNNEL_MAX, 21 }; 22 #define SEG6_IPTUNNEL_MAX (__SEG6_IPTUNNEL_MAX - 1) 23 24 struct seg6_iptunnel_encap { 25 int mode; 26 struct ipv6_sr_hdr srh[0]; 27 }; 28 29 #define SEG6_IPTUN_ENCAP_SIZE(x) ((sizeof(*x)) + (((x)->srh->hdrlen + 1) << 3)) 30 31 enum { 32 SEG6_IPTUN_MODE_INLINE, 33 SEG6_IPTUN_MODE_ENCAP, 34 }; 35 36 #ifdef __KERNEL__ 37 38 static inline size_t seg6_lwt_headroom(struct seg6_iptunnel_encap *tuninfo) 39 { 40 int encap = (tuninfo->mode == SEG6_IPTUN_MODE_ENCAP); 41 42 return ((tuninfo->srh->hdrlen + 1) << 3) + 43 (encap * sizeof(struct ipv6hdr)); 44 } 45 46 #endif 47 48 #endif 49