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/*
* Copyright 2013 Google Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/*
* Author: ncardwell@google.com (Neal Cardwell)
*
* Our own IPv6 header declarations, so we have something that's
* portable and somewhat more readable than a typical system header
* file.
*/
#ifndef __IPV6_HEADERS_H__
#define __IPV6_HEADERS_H__
#include "types.h"
#include <netinet/in.h>
struct ipv6 {
#if __BYTE_ORDER == __LITTLE_ENDIAN
__u8 traffic_class_hi:4,
version:4;
__u8 flow_label_hi:4,
traffic_class_lo:4;
__u16 flow_label_lo;
#elif __BYTE_ORDER == __BIG_ENDIAN
__u8 version:4,
traffic_class_hi:4;
__u8 traffic_class_lo:4,
flow_label_hi:4;
__u16 flow_label_lo;
#else
# error "Please fix endianness defines"
#endif
__be16 payload_len;
__u8 next_header;
__u8 hop_limit;
struct in6_addr src_ip;
struct in6_addr dst_ip;
};
#ifdef linux
#define IPV6_HOPLIMIT 52
#define IPV6_TCLASS 67
#endif /* linux */
static inline u8 ipv6_tos_byte(const struct ipv6 *ipv6)
{
return (ipv6->traffic_class_hi << 4) | ipv6->traffic_class_lo;
}
static inline u32 ipv6_flow_label(const struct ipv6 *ipv6)
{
return (ntohs(ipv6->flow_label_lo)) | (ipv6->flow_label_hi << 16);
}
static inline u8 ipv6_hoplimit_byte(const struct ipv6 *ipv6)
{
return ipv6->hop_limit;
}
/* The following struct declaration is needed for the IPv6 ioctls
* SIOCSIFADDR and SIOCDIFADDR that add and delete IPv6 addresses from
* a network interface. We have to declare our own version here
* because this struct is only available in /usr/include/linux/ipv6.h,
* but that .h file has kernel IPv6 declarations that conflict with
* standard user-space IPv6 declarations.
*/
struct in6_ifreq {
struct in6_addr ifr6_addr;
__u32 ifr6_prefixlen;
int ifr6_ifindex;
};
#endif /* __IPV6_HEADERS_H__ */
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