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 #include <linux/seg6.h> /* For struct ipv6_sr_hdr. */ 18 19 enum { 20 SEG6_IPTUNNEL_UNSPEC, 21 SEG6_IPTUNNEL_SRH, 22 __SEG6_IPTUNNEL_MAX, 23 }; 24 #define SEG6_IPTUNNEL_MAX (__SEG6_IPTUNNEL_MAX - 1) 25 26 struct seg6_iptunnel_encap { 27 int mode; 28 struct ipv6_sr_hdr srh[0]; 29 }; 30 31 #define SEG6_IPTUN_ENCAP_SIZE(x) ((sizeof(*x)) + (((x)->srh->hdrlen + 1) << 3)) 32 33 enum { 34 SEG6_IPTUN_MODE_INLINE, 35 SEG6_IPTUN_MODE_ENCAP, 36 }; 37 38 #ifdef __KERNEL__ 39 40 static inline size_t seg6_lwt_headroom(struct seg6_iptunnel_encap *tuninfo) 41 { 42 int encap = (tuninfo->mode == SEG6_IPTUN_MODE_ENCAP); 43 44 return ((tuninfo->srh->hdrlen + 1) << 3) + 45 (encap * sizeof(struct ipv6hdr)); 46 } 47 48 #endif 49 50 #endif 51