include/linux/ipv6.h - maze/linux - Git at Google

 #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;
 	__s32		force_mld_version;
 #ifdef CONFIG_IPV6_PRIVACY
 	__s32		use_tempaddr;
 	__s32		temp_valid_lft;
 	__s32		temp_prefered_lft;
 	__s32		regen_max_retry;
 	__s32		max_desync_factor;
 #endif
 	__s32		max_addresses;
 	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,
 	DEVCONF_USE_TEMPADDR,
 	DEVCONF_TEMP_VALID_LFT,
 	DEVCONF_TEMP_PREFERED_LFT,
 	DEVCONF_REGEN_MAX_RETRY,
 	DEVCONF_MAX_DESYNC_FACTOR,
 	DEVCONF_MAX_ADDRESSES,
 	DEVCONF_FORCE_MLD_VERSION,
 	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			dst0;
 	__u16			srcrt;
 	__u16			dst1;
 };

 #define IP6CB(skb)	((struct inet6_skb_parm*)((skb)->cb))

 struct tcp6_request_sock {
 	struct tcp_request_sock	req;
 	struct in6_addr		loc_addr;
 	struct in6_addr		rmt_addr;
 	struct sk_buff		*pktopts;
 	int			iif;
 };

 static inline struct tcp6_request_sock *tcp6_rsk(const struct request_sock *sk)
 {
 	return (struct tcp6_request_sock *)sk;
 }

 /**
  * struct ipv6_pinfo - ipv6 private area
  *
  * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
  * this _must_ be the last member, so that inet6_sk_generic
  * is able to calculate its offset from the base struct sock
  * by using the struct proto->slab_obj_size member. -acme
  */
 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;
 	__s16			hop_limit;
 	__s16			mcast_hops;
 	int			mcast_oif;

 	/* pktoption flags */
 	union {
 		struct {
 			__u8	srcrt:2,
 			        rxinfo:1,
 				rxhlim:1,
 				hopopts:1,
 				dstopts:1,
                                 rxflow:1;
 		} bits;
 		__u8		all;
 	} rxopt;

 	/* sockopt flags */
 	__u8			mc_loop:1,
 	                        recverr:1,
 	                        sndflow:1,
 				pmtudisc:2,
 				ipv6only:1;

 	__u32			dst_cookie;

 	struct ipv6_mc_socklist	*ipv6_mc_list;
 	struct ipv6_ac_socklist	*ipv6_ac_list;
 	struct ipv6_fl_socklist *ipv6_fl_list;

 	struct ipv6_txoptions	*opt;
 	struct sk_buff		*pktoptions;
 	struct {
 		struct ipv6_txoptions *opt;
 		struct rt6_info	*rt;
 		int hop_limit;
 	} cork;
 };

 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
 struct raw6_sock {
 	/* inet_sock has to be the first member of raw6_sock */
 	struct inet_sock	inet;
 	__u32			checksum;	/* perform checksum */
 	__u32			offset;		/* checksum offset  */
 	struct icmp6_filter	filter;
 	/* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
 	struct ipv6_pinfo	inet6;
 };

 struct udp6_sock {
 	struct udp_sock	  udp;
 	/* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
 	struct ipv6_pinfo inet6;
 };

 struct tcp6_sock {
 	struct tcp_sock	  tcp;
 	/* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
 	struct ipv6_pinfo inet6;
 };

 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
 {
 	return inet_sk(__sk)->pinet6;
 }

 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
 {
 	return (struct raw6_sock *)sk;
 }

 static inline void inet_sk_copy_descendant(struct sock *sk_to,
 					   const struct sock *sk_from)
 {
 	int ancestor_size = sizeof(struct inet_sock);

 	if (sk_from->sk_family == PF_INET6)
 		ancestor_size += sizeof(struct ipv6_pinfo);

 	__inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
 }

 #define __ipv6_only_sock(sk)	(inet6_sk(sk)->ipv6only)
 #define ipv6_only_sock(sk)	((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))

 #include <linux/tcp.h>

 struct tcp6_timewait_sock {
 	struct tcp_timewait_sock tw_v6_sk;
 	struct in6_addr		 tw_v6_daddr;
 	struct in6_addr		 tw_v6_rcv_saddr;
 };

 static inline struct tcp6_timewait_sock *tcp6_twsk(const struct sock *sk)
 {
 	return (struct tcp6_timewait_sock *)sk;
 }

 static inline struct in6_addr *__tcp_v6_rcv_saddr(const struct sock *sk)
 {
 	return likely(sk->sk_state != TCP_TIME_WAIT) ?
 		&inet6_sk(sk)->rcv_saddr : &tcp6_twsk(sk)->tw_v6_rcv_saddr;
 }

 static inline struct in6_addr *tcp_v6_rcv_saddr(const struct sock *sk)
 {
 	return sk->sk_family == AF_INET6 ? __tcp_v6_rcv_saddr(sk) : NULL;
 }

 static inline int tcp_twsk_ipv6only(const struct sock *sk)
 {
 	return inet_twsk(sk)->tw_ipv6only;
 }

 static inline int tcp_v6_ipv6only(const struct sock *sk)
 {
 	return likely(sk->sk_state != TCP_TIME_WAIT) ?
 		ipv6_only_sock(sk) : tcp_twsk_ipv6only(sk);
 }
 #else
 #define __ipv6_only_sock(sk)	0
 #define ipv6_only_sock(sk)	0

 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
 {
 	return NULL;
 }

 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
 {
 	return NULL;
 }

 #define __tcp_v6_rcv_saddr(__sk)	NULL
 #define tcp_v6_rcv_saddr(__sk)		NULL
 #define tcp_twsk_ipv6only(__sk)		0
 #define tcp_v6_ipv6only(__sk)		0
 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */

 #define INET6_MATCH(__sk, __saddr, __daddr, __ports, __dif)	   \
 	(((*((__u32 *)&(inet_sk(__sk)->dport))) == (__ports))  	&& \
 	 ((__sk)->sk_family		== AF_INET6)		&& \
 	 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr))	&& \
 	 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr))	&& \
 	 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))

 #endif /* __KERNEL__ */

 #endif /* _IPV6_H */
	#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;
	__s32 force_mld_version;
	#ifdef CONFIG_IPV6_PRIVACY
	__s32 use_tempaddr;
	__s32 temp_valid_lft;
	__s32 temp_prefered_lft;
	__s32 regen_max_retry;
	__s32 max_desync_factor;
	#endif
	__s32 max_addresses;
	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,
	DEVCONF_USE_TEMPADDR,
	DEVCONF_TEMP_VALID_LFT,
	DEVCONF_TEMP_PREFERED_LFT,
	DEVCONF_REGEN_MAX_RETRY,
	DEVCONF_MAX_DESYNC_FACTOR,
	DEVCONF_MAX_ADDRESSES,
	DEVCONF_FORCE_MLD_VERSION,
	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 dst0;
	__u16 srcrt;
	__u16 dst1;
	};

	#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))

	struct tcp6_request_sock {
	struct tcp_request_sock req;
	struct in6_addr loc_addr;
	struct in6_addr rmt_addr;
	struct sk_buff *pktopts;
	int iif;
	};

	static inline struct tcp6_request_sock tcp6_rsk(const struct request_sock sk)
	{
	return (struct tcp6_request_sock *)sk;
	}

	/**
	* struct ipv6_pinfo - ipv6 private area
	*
	* In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
	* this _must_ be the last member, so that inet6_sk_generic
	* is able to calculate its offset from the base struct sock
	* by using the struct proto->slab_obj_size member. -acme
	*/
	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;
	__s16 hop_limit;
	__s16 mcast_hops;
	int mcast_oif;

	/* pktoption flags */
	union {
	struct {
	__u8 srcrt:2,
	rxinfo:1,
	rxhlim:1,
	hopopts:1,
	dstopts:1,
	rxflow:1;
	} bits;
	__u8 all;
	} rxopt;

	/* sockopt flags */
	__u8 mc_loop:1,
	recverr:1,
	sndflow:1,
	pmtudisc:2,
	ipv6only:1;

	__u32 dst_cookie;

	struct ipv6_mc_socklist *ipv6_mc_list;
	struct ipv6_ac_socklist *ipv6_ac_list;
	struct ipv6_fl_socklist *ipv6_fl_list;

	struct ipv6_txoptions *opt;
	struct sk_buff *pktoptions;
	struct {
	struct ipv6_txoptions *opt;
	struct rt6_info *rt;
	int hop_limit;
	} cork;
	};

	/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
	struct raw6_sock {
	/* inet_sock has to be the first member of raw6_sock */
	struct inet_sock inet;
	__u32 checksum; /* perform checksum */
	__u32 offset; /* checksum offset */
	struct icmp6_filter filter;
	/* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
	struct ipv6_pinfo inet6;
	};

	struct udp6_sock {
	struct udp_sock udp;
	/* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
	struct ipv6_pinfo inet6;
	};

	struct tcp6_sock {
	struct tcp_sock tcp;
	/* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
	struct ipv6_pinfo inet6;
	};

	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	{
	return inet_sk(__sk)->pinet6;
	}

	static inline struct raw6_sock raw6_sk(const struct sock sk)
	{
	return (struct raw6_sock *)sk;
	}

	static inline void inet_sk_copy_descendant(struct sock *sk_to,
	const struct sock *sk_from)
	{
	int ancestor_size = sizeof(struct inet_sock);

	if (sk_from->sk_family == PF_INET6)
	ancestor_size += sizeof(struct ipv6_pinfo);

	__inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
	}

	#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
	#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))

	#include <linux/tcp.h>

	struct tcp6_timewait_sock {
	struct tcp_timewait_sock tw_v6_sk;
	struct in6_addr tw_v6_daddr;
	struct in6_addr tw_v6_rcv_saddr;
	};

	static inline struct tcp6_timewait_sock tcp6_twsk(const struct sock sk)
	{
	return (struct tcp6_timewait_sock *)sk;
	}

	static inline struct in6_addr __tcp_v6_rcv_saddr(const struct sock sk)
	{
	return likely(sk->sk_state != TCP_TIME_WAIT) ?
	&inet6_sk(sk)->rcv_saddr : &tcp6_twsk(sk)->tw_v6_rcv_saddr;
	}

	static inline struct in6_addr tcp_v6_rcv_saddr(const struct sock sk)
	{
	return sk->sk_family == AF_INET6 ? __tcp_v6_rcv_saddr(sk) : NULL;
	}

	static inline int tcp_twsk_ipv6only(const struct sock *sk)
	{
	return inet_twsk(sk)->tw_ipv6only;
	}

	static inline int tcp_v6_ipv6only(const struct sock *sk)
	{
	return likely(sk->sk_state != TCP_TIME_WAIT) ?
	ipv6_only_sock(sk) : tcp_twsk_ipv6only(sk);
	}
	#else
	#define __ipv6_only_sock(sk) 0
	#define ipv6_only_sock(sk) 0

	static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
	{
	return NULL;
	}

	static inline struct raw6_sock raw6_sk(const struct sock sk)
	{
	return NULL;
	}

	#define __tcp_v6_rcv_saddr(__sk) NULL
	#define tcp_v6_rcv_saddr(__sk) NULL
	#define tcp_twsk_ipv6only(__sk) 0
	#define tcp_v6_ipv6only(__sk) 0
	#endif /* defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE) */

	#define INET6_MATCH(__sk, __saddr, __daddr, __ports, __dif) \
	(((((__u32 )&(inet_sk(__sk)->dport))) == (__ports)) && \
	((__sk)->sk_family == AF_INET6) && \
	ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
	ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
	(!((__sk)->sk_bound_dev_if) \|\| ((__sk)->sk_bound_dev_if == (__dif))))

	#endif /* __KERNEL__ */

	#endif /* _IPV6_H */