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#ifndef _IPV6_H
#define _IPV6_H
#include <linux/config.h>
#include <linux/in6.h>
#include <asm/byteorder.h>
/* The latest drafts declared increase in minimal mtu up to 1280. */
#define IPV6_MIN_MTU 1280
/*
* 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
};
struct ipv6_auth_hdr {
__u8 nexthdr;
__u8 hdrlen; /* This one is measured in 32 bit units! */
__u16 reserved;
__u32 spi;
__u32 seq_no; /* Sequence number */
__u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */
};
struct ipv6_esp_hdr {
__u32 spi;
__u32 seq_no; /* Sequence number */
__u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */
};
struct ipv6_comp_hdr {
__u8 nexthdr;
__u8 flags;
__u16 cpi;
};
/*
* IPv6 fixed header
*
* BEWARE, it is incorrect. The first 4 bits of flow_lbl
* are glued to priority now, forming "class".
*/
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;
};
/*
* This structure contains configuration options per IPv6 link.
*/
struct ipv6_devconf {
__s32 forwarding;
__s32 hop_limit;
__s32 mtu6;
__s32 accept_ra;
__s32 accept_redirects;
__s32 autoconf;
__s32 dad_transmits;
__s32 rtr_solicits;
__s32 rtr_solicit_interval;
__s32 rtr_solicit_delay;
#ifdef CONFIG_IPV6_PRIVACY
__s32 use_tempaddr;
__s32 temp_valid_lft;
__s32 temp_prefered_lft;
__s32 regen_max_retry;
__s32 max_desync_factor;
#endif
void *sysctl;
};
/* index values for the variables in ipv6_devconf */
enum {
DEVCONF_FORWARDING = 0,
DEVCONF_HOPLIMIT,
DEVCONF_MTU6,
DEVCONF_ACCEPT_RA,
DEVCONF_ACCEPT_REDIRECTS,
DEVCONF_AUTOCONF,
DEVCONF_DAD_TRANSMITS,
DEVCONF_RTR_SOLICITS,
DEVCONF_RTR_SOLICIT_INTERVAL,
DEVCONF_RTR_SOLICIT_DELAY,
#ifdef CONFIG_IPV6_PRIVACY
DEVCONF_USE_TEMPADDR,
DEVCONF_TEMP_VALID_LFT,
DEVCONF_TEMP_PREFERED_LFT,
DEVCONF_REGEN_MAX_RETRY,
DEVCONF_MAX_DESYNC_FACTOR,
#endif
DEVCONF_MAX
};
#ifdef __KERNEL__
#include <linux/in6.h> /* struct sockaddr_in6 */
#include <linux/icmpv6.h>
#include <net/if_inet6.h> /* struct ipv6_mc_socklist */
#include <linux/tcp.h>
#include <linux/udp.h>
/*
This structure contains results of exthdrs parsing
as offsets from skb->nh.
*/
struct inet6_skb_parm
{
int iif;
__u16 ra;
__u16 hop;
__u16 auth;
__u16 dst0;
__u16 srcrt;
__u16 dst1;
};
struct ipv6_pinfo {
struct in6_addr saddr;
struct in6_addr rcv_saddr;
struct in6_addr daddr;
struct in6_addr *daddr_cache;
__u32 flow_label;
__u32 frag_size;
int hop_limit;
int mcast_hops;
int mcast_oif;
/* pktoption flags */
union {
struct {
__u8 srcrt:2,
rxinfo:1,
rxhlim:1,
hopopts:1,
dstopts:1,
authhdr:1,
rxflow:1;
} bits;
__u8 all;
} rxopt;
/* sockopt flags */
__u8 mc_loop:1,
recverr:1,
sndflow:1,
pmtudisc:2,
ipv6only:1;
struct ipv6_mc_socklist *ipv6_mc_list;
struct ipv6_ac_socklist *ipv6_ac_list;
struct ipv6_fl_socklist *ipv6_fl_list;
__u32 dst_cookie;
struct ipv6_txoptions *opt;
struct sk_buff *pktoptions;
struct {
struct ipv6_txoptions *opt;
struct rt6_info *rt;
int hop_limit;
} cork;
};
struct raw6_opt {
__u32 checksum; /* perform checksum */
__u32 offset; /* checksum offset */
struct icmp6_filter filter;
};
/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
struct raw6_sock {
struct sock sk;
struct ipv6_pinfo *pinet6;
struct inet_opt inet;
struct raw6_opt raw6;
struct ipv6_pinfo inet6;
};
struct udp6_sock {
struct sock sk;
struct ipv6_pinfo *pinet6;
struct inet_opt inet;
struct udp_opt udp;
struct ipv6_pinfo inet6;
};
struct tcp6_sock {
struct sock sk;
struct ipv6_pinfo *pinet6;
struct inet_opt inet;
struct tcp_opt tcp;
struct ipv6_pinfo inet6;
};
#define inet6_sk(__sk) ((struct raw6_sock *)__sk)->pinet6
#define raw6_sk(__sk) (&((struct raw6_sock *)__sk)->raw6)
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
#else
#define __ipv6_only_sock(sk) 0
#define ipv6_only_sock(sk) 0
#endif
#endif
#endif