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#ifndef _IPV6_H
#define _IPV6_H
#include <linux/in6.h>
#include <asm/byteorder.h>
/*
* Advanced API
* source interface/address selection, source routing, etc...
* *under construction*
*/
struct in6_pktinfo {
struct in6_addr ipi6_addr;
int ipi6_ifindex;
};
struct in6_ifreq {
struct in6_addr ifr6_addr;
__u32 ifr6_prefixlen;
int ifr6_ifindex;
};
#define IPV6_SRCRT_STRICT 0x01 /* this hop must be a neighbor */
#define IPV6_SRCRT_TYPE_0 0 /* IPv6 type 0 Routing Header */
/*
* routing header
*/
struct ipv6_rt_hdr {
__u8 nexthdr;
__u8 hdrlen;
__u8 type;
__u8 segments_left;
/*
* type specific data
* variable length field
*/
};
struct ipv6_opt_hdr {
__u8 nexthdr;
__u8 hdrlen;
/*
* TLV encoded option data follows.
*/
};
#define ipv6_destopt_hdr ipv6_opt_hdr
#define ipv6_hopopt_hdr ipv6_opt_hdr
#ifdef __KERNEL__
#define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
#endif
/*
* routing header type 0 (used in cmsghdr struct)
*/
struct rt0_hdr {
struct ipv6_rt_hdr rt_hdr;
__u32 bitmap; /* strict/loose bit map */
struct in6_addr addr[0];
#define rt0_type rt_hdr.type;
};
#ifdef __KERNEL__
/*
* IPv6 fixed header
*/
struct ipv6hdr {
#if defined(__LITTLE_ENDIAN_BITFIELD)
__u8 priority:4,
version:4;
#elif defined(__BIG_ENDIAN_BITFIELD)
__u8 version:4,
priority:4;
#else
#error "Please fix <asm/byteorder.h>"
#endif
__u8 flow_lbl[3];
__u16 payload_len;
__u8 nexthdr;
__u8 hop_limit;
struct in6_addr saddr;
struct in6_addr daddr;
};
/*
* The length of this struct cannot be greater than the length of
* the proto_priv field in a sk_buff which is currently
* defined to be 16 bytes.
* Pointers take upto 8 bytes (sizeof(void *) is 8 on the alpha).
*/
struct ipv6_options
{
/* length of extension headers */
__u16 opt_flen; /* after fragment hdr */
__u16 opt_nflen; /* before fragment hdr */
/*
* protocol options
* usually carried in IPv6 extension headers
*/
struct ipv6_rt_hdr *srcrt; /* Routing Header */
};
#endif
#endif
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