[deliverable/linux.git] / include / net / ipv6.h

/*
 *	Linux INET6 implementation
 *
 *	Authors:
 *	Pedro Roque		<roque@di.fc.ul.pt>
 *
 *	$Id: ipv6.h,v 1.1 2002/05/20 15:13:07 jgrimm Exp $
 *
 *	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.
 */

#ifndef _NET_IPV6_H
#define _NET_IPV6_H

#include <linux/ipv6.h>
#include <linux/hardirq.h>
#include <net/if_inet6.h>
#include <net/ndisc.h>
#include <net/flow.h>
#include <net/snmp.h>

#define SIN6_LEN_RFC2133	24

#define IPV6_MAXPLEN		65535

/*
 *	NextHeader field of IPv6 header
 */

#define NEXTHDR_HOP		0	/* Hop-by-hop option header. */
#define NEXTHDR_TCP		6	/* TCP segment. */
#define NEXTHDR_UDP		17	/* UDP message. */
#define NEXTHDR_IPV6		41	/* IPv6 in IPv6 */
#define NEXTHDR_ROUTING		43	/* Routing header. */
#define NEXTHDR_FRAGMENT	44	/* Fragmentation/reassembly header. */
#define NEXTHDR_ESP		50	/* Encapsulating security payload. */
#define NEXTHDR_AUTH		51	/* Authentication header. */
#define NEXTHDR_ICMP		58	/* ICMP for IPv6. */
#define NEXTHDR_NONE		59	/* No next header */
#define NEXTHDR_DEST		60	/* Destination options header. */
#define NEXTHDR_MOBILITY	135	/* Mobility header. */

#define NEXTHDR_MAX		255


#define IPV6_DEFAULT_HOPLIMIT   64
#define IPV6_DEFAULT_MCASTHOPS	1

/*
 *	Addr type
 *	
 *	type	-	unicast | multicast
 *	scope	-	local	| site	    | global
 *	v4	-	compat
 *	v4mapped
 *	any
 *	loopback
 */

#define IPV6_ADDR_ANY		0x0000U

#define IPV6_ADDR_UNICAST      	0x0001U	
#define IPV6_ADDR_MULTICAST    	0x0002U	

#define IPV6_ADDR_LOOPBACK	0x0010U
#define IPV6_ADDR_LINKLOCAL	0x0020U
#define IPV6_ADDR_SITELOCAL	0x0040U

#define IPV6_ADDR_COMPATv4	0x0080U

#define IPV6_ADDR_SCOPE_MASK	0x00f0U

#define IPV6_ADDR_MAPPED	0x1000U
#define IPV6_ADDR_RESERVED	0x2000U	/* reserved address space */

/*
 *	Addr scopes
 */
#ifdef __KERNEL__
#define IPV6_ADDR_MC_SCOPE(a)	\
	((a)->s6_addr[1] & 0x0f)	/* nonstandard */
#define __IPV6_ADDR_SCOPE_INVALID	-1
#endif
#define IPV6_ADDR_SCOPE_NODELOCAL	0x01
#define IPV6_ADDR_SCOPE_LINKLOCAL	0x02
#define IPV6_ADDR_SCOPE_SITELOCAL	0x05
#define IPV6_ADDR_SCOPE_ORGLOCAL	0x08
#define IPV6_ADDR_SCOPE_GLOBAL		0x0e

/*
 *	fragmentation header
 */

struct frag_hdr {
	__u8	nexthdr;
	__u8	reserved;
	__be16	frag_off;
	__be32	identification;
};

#define	IP6_MF	0x0001

#ifdef __KERNEL__

#include <net/sock.h>

/* sysctls */
extern int sysctl_mld_max_msf;
extern struct ctl_path net_ipv6_ctl_path[];

#define _DEVINC(statname, modifier, idev, field)			\
({									\
	struct inet6_dev *_idev = (idev);				\
	if (likely(_idev != NULL))					\
		SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
	SNMP_INC_STATS##modifier(statname##_statistics, (field));	\
})

#define _DEVADD(statname, modifier, idev, field, val)			\
({									\
	struct inet6_dev *_idev = (idev);				\
	if (likely(_idev != NULL))					\
		SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
	SNMP_ADD_STATS##modifier(statname##_statistics, (field), (val));\
})

/* MIBs */
DECLARE_SNMP_STAT(struct ipstats_mib, ipv6_statistics);

#define IP6_INC_STATS(idev,field)	_DEVINC(ipv6, , idev, field)
#define IP6_INC_STATS_BH(idev,field)	_DEVINC(ipv6, _BH, idev, field)
#define IP6_INC_STATS_USER(idev,field)	_DEVINC(ipv6, _USER, idev, field)
#define IP6_ADD_STATS_BH(idev,field,val) _DEVADD(ipv6, _BH, idev, field, val)

DECLARE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics);
DECLARE_SNMP_STAT(struct icmpv6msg_mib, icmpv6msg_statistics);

#define ICMP6_INC_STATS(idev, field)	_DEVINC(icmpv6, , idev, field)
#define ICMP6_INC_STATS_BH(idev, field)	_DEVINC(icmpv6, _BH, idev, field)
#define ICMP6_INC_STATS_USER(idev, field) _DEVINC(icmpv6, _USER, idev, field)

#define ICMP6MSGOUT_INC_STATS(idev, field) \
	_DEVINC(icmpv6msg, , idev, field +256)
#define ICMP6MSGOUT_INC_STATS_BH(idev, field) \
	_DEVINC(icmpv6msg, _BH, idev, field +256)
#define ICMP6MSGOUT_INC_STATS_USER(idev, field) \
	_DEVINC(icmpv6msg, _USER, idev, field +256)
#define ICMP6MSGIN_INC_STATS(idev, field) \
	 _DEVINC(icmpv6msg, , idev, field)
#define ICMP6MSGIN_INC_STATS_BH(idev, field) \
	_DEVINC(icmpv6msg, _BH, idev, field)
#define ICMP6MSGIN_INC_STATS_USER(idev, field) \
	_DEVINC(icmpv6msg, _USER, idev, field)

struct ip6_ra_chain
{
	struct ip6_ra_chain	*next;
	struct sock		*sk;
	int			sel;
	void			(*destructor)(struct sock *);
};

extern struct ip6_ra_chain	*ip6_ra_chain;
extern rwlock_t ip6_ra_lock;

/*
   This structure is prepared by protocol, when parsing
   ancillary data and passed to IPv6.
 */

struct ipv6_txoptions
{
	/* Length of this structure */
	int			tot_len;

	/* length of extension headers   */

	__u16			opt_flen;	/* after fragment hdr */
	__u16			opt_nflen;	/* before fragment hdr */

	struct ipv6_opt_hdr	*hopopt;
	struct ipv6_opt_hdr	*dst0opt;
	struct ipv6_rt_hdr	*srcrt;	/* Routing Header */
	struct ipv6_opt_hdr	*dst1opt;

	/* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
};

struct ip6_flowlabel
{
	struct ip6_flowlabel	*next;
	__be32			label;
	atomic_t		users;
	struct in6_addr		dst;
	struct ipv6_txoptions	*opt;
	unsigned long		linger;
	u8			share;
	u32			owner;
	unsigned long		lastuse;
	unsigned long		expires;
	struct net		*fl_net;
};

#define IPV6_FLOWINFO_MASK	__constant_htonl(0x0FFFFFFF)
#define IPV6_FLOWLABEL_MASK	__constant_htonl(0x000FFFFF)

struct ipv6_fl_socklist
{
	struct ipv6_fl_socklist	*next;
	struct ip6_flowlabel	*fl;
};

extern struct ip6_flowlabel	*fl6_sock_lookup(struct sock *sk, __be32 label);
extern struct ipv6_txoptions	*fl6_merge_options(struct ipv6_txoptions * opt_space,
						   struct ip6_flowlabel * fl,
						   struct ipv6_txoptions * fopt);
extern void			fl6_free_socklist(struct sock *sk);
extern int			ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
extern int			ip6_flowlabel_init(void);
extern void			ip6_flowlabel_cleanup(void);

static inline void fl6_sock_release(struct ip6_flowlabel *fl)
{
	if (fl)
		atomic_dec(&fl->users);
}

extern int 			ip6_ra_control(struct sock *sk, int sel,
					       void (*destructor)(struct sock *));


extern int			ipv6_parse_hopopts(struct sk_buff *skb);

extern struct ipv6_txoptions *  ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
extern struct ipv6_txoptions *	ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
						   int newtype,
						   struct ipv6_opt_hdr __user *newopt,
						   int newoptlen);
struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
					  struct ipv6_txoptions *opt);

extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);

int ip6_frag_nqueues(struct net *net);
int ip6_frag_mem(struct net *net);

#define IPV6_FRAG_TIMEOUT	(60*HZ)		/* 60 seconds */

extern int __ipv6_addr_type(const struct in6_addr *addr);
static inline int ipv6_addr_type(const struct in6_addr *addr)
{
	return __ipv6_addr_type(addr) & 0xffff;
}

static inline int ipv6_addr_scope(const struct in6_addr *addr)
{
	return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
}

static inline int __ipv6_addr_src_scope(int type)
{
	return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
}

static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
{
	return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
}

static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
{
	return memcmp(a1, a2, sizeof(struct in6_addr));
}

static inline int
ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
		     const struct in6_addr *a2)
{
	return (!!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
		   ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
		   ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
		   ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])));
}

static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
{
	memcpy(a1, a2, sizeof(struct in6_addr));
}

static inline void ipv6_addr_prefix(struct in6_addr *pfx, 
				    const struct in6_addr *addr,
				    int plen)
{
	/* caller must guarantee 0 <= plen <= 128 */
	int o = plen >> 3,
	    b = plen & 0x7;

	memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
	memcpy(pfx->s6_addr, addr, o);
	if (b != 0)
		pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
}

static inline void ipv6_addr_set(struct in6_addr *addr, 
				     __be32 w1, __be32 w2,
				     __be32 w3, __be32 w4)
{
	addr->s6_addr32[0] = w1;
	addr->s6_addr32[1] = w2;
	addr->s6_addr32[2] = w3;
	addr->s6_addr32[3] = w4;
}

static inline int ipv6_addr_equal(const struct in6_addr *a1,
				  const struct in6_addr *a2)
{
	return (((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
		 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
		 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
		 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0);
}

static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
				      unsigned int prefixlen)
{
	unsigned pdw, pbi;

	/* check complete u32 in prefix */
	pdw = prefixlen >> 5;
	if (pdw && memcmp(a1, a2, pdw << 2))
		return 0;

	/* check incomplete u32 in prefix */
	pbi = prefixlen & 0x1f;
	if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
		return 0;

	return 1;
}

static inline int ipv6_prefix_equal(const struct in6_addr *a1,
				    const struct in6_addr *a2,
				    unsigned int prefixlen)
{
	return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
				   prefixlen);
}

struct inet_frag_queue;

struct ip6_create_arg {
	__be32 id;
	struct in6_addr *src;
	struct in6_addr *dst;
};

void ip6_frag_init(struct inet_frag_queue *q, void *a);
int ip6_frag_match(struct inet_frag_queue *q, void *a);

static inline int ipv6_addr_any(const struct in6_addr *a)
{
	return ((a->s6_addr32[0] | a->s6_addr32[1] | 
		 a->s6_addr32[2] | a->s6_addr32[3] ) == 0); 
}

static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
{
	return ((a->s6_addr32[0] | a->s6_addr32[1] |
		 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0);
}

/*
 * Check for a RFC 4843 ORCHID address
 * (Overlay Routable Cryptographic Hash Identifiers)
 */
static inline int ipv6_addr_orchid(const struct in6_addr *a)
{
	return ((a->s6_addr32[0] & htonl(0xfffffff0))
		== htonl(0x20010010));
}

static inline void ipv6_addr_set_v4mapped(const __be32 addr,
					  struct in6_addr *v4mapped)
{
	ipv6_addr_set(v4mapped,
			0, 0,
			htonl(0x0000FFFF),
			addr);
}

/*
 * find the first different bit between two addresses
 * length of address must be a multiple of 32bits
 */
static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
{
	const __be32 *a1 = token1, *a2 = token2;
	int i;

	addrlen >>= 2;

	for (i = 0; i < addrlen; i++) {
		__be32 xb = a1[i] ^ a2[i];
		if (xb)
			return i * 32 + 32 - fls(ntohl(xb));
	}

	/*
	 *	we should *never* get to this point since that 
	 *	would mean the addrs are equal
	 *
	 *	However, we do get to it 8) And exacly, when
	 *	addresses are equal 8)
	 *
	 *	ip route add 1111::/128 via ...
	 *	ip route add 1111::/64 via ...
	 *	and we are here.
	 *
	 *	Ideally, this function should stop comparison
	 *	at prefix length. It does not, but it is still OK,
	 *	if returned value is greater than prefix length.
	 *					--ANK (980803)
	 */
	return (addrlen << 5);
}

static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
{
	return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
}

/*
 *	Prototypes exported by ipv6
 */

/*
 *	rcv function (called from netdevice level)
 */

extern int			ipv6_rcv(struct sk_buff *skb, 
					 struct net_device *dev, 
					 struct packet_type *pt,
					 struct net_device *orig_dev);

extern int			ip6_rcv_finish(struct sk_buff *skb);

/*
 *	upper-layer output functions
 */
extern int			ip6_xmit(struct sock *sk,
					 struct sk_buff *skb,
					 struct flowi *fl,
					 struct ipv6_txoptions *opt,
					 int ipfragok);

extern int			ip6_nd_hdr(struct sock *sk,
					   struct sk_buff *skb,
					   struct net_device *dev,
					   const struct in6_addr *saddr,
					   const struct in6_addr *daddr,
					   int proto, int len);

extern int			ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);

extern int			ip6_append_data(struct sock *sk,
						int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
		    				void *from,
						int length,
						int transhdrlen,
		      				int hlimit,
		      				int tclass,
						struct ipv6_txoptions *opt,
						struct flowi *fl,
						struct rt6_info *rt,
						unsigned int flags);

extern int			ip6_push_pending_frames(struct sock *sk);

extern void			ip6_flush_pending_frames(struct sock *sk);

extern int			ip6_dst_lookup(struct sock *sk,
					       struct dst_entry **dst,
					       struct flowi *fl);
extern int			ip6_dst_blackhole(struct sock *sk,
						  struct dst_entry **dst,
						  struct flowi *fl);
extern int			ip6_sk_dst_lookup(struct sock *sk,
						  struct dst_entry **dst,
						  struct flowi *fl);

/*
 *	skb processing functions
 */

extern int			ip6_output(struct sk_buff *skb);
extern int			ip6_forward(struct sk_buff *skb);
extern int			ip6_input(struct sk_buff *skb);
extern int			ip6_mc_input(struct sk_buff *skb);

extern int			__ip6_local_out(struct sk_buff *skb);
extern int			ip6_local_out(struct sk_buff *skb);

/*
 *	Extension header (options) processing
 */

extern void 			ipv6_push_nfrag_opts(struct sk_buff *skb,
						     struct ipv6_txoptions *opt,
						     u8 *proto,
						     struct in6_addr **daddr_p);
extern void			ipv6_push_frag_opts(struct sk_buff *skb,
						    struct ipv6_txoptions *opt,
						    u8 *proto);

extern int			ipv6_skip_exthdr(const struct sk_buff *, int start,
					         u8 *nexthdrp);

extern int 			ipv6_ext_hdr(u8 nexthdr);

extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);

/*
 *	socket options (ipv6_sockglue.c)
 */

extern int			ipv6_setsockopt(struct sock *sk, int level, 
						int optname,
						char __user *optval, 
						int optlen);
extern int			ipv6_getsockopt(struct sock *sk, int level, 
						int optname,
						char __user *optval, 
						int __user *optlen);
extern int			compat_ipv6_setsockopt(struct sock *sk,
						int level,
						int optname,
						char __user *optval,
						int optlen);
extern int			compat_ipv6_getsockopt(struct sock *sk,
						int level,
						int optname,
						char __user *optval,
						int __user *optlen);

extern int			ip6_datagram_connect(struct sock *sk, 
						     struct sockaddr *addr, int addr_len);

extern int 			ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
extern void			ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
						u32 info, u8 *payload);
extern void			ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);

extern int inet6_release(struct socket *sock);
extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr, 
		      int addr_len);
extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
			 int *uaddr_len, int peer);
extern int inet6_ioctl(struct socket *sock, unsigned int cmd, 
		       unsigned long arg);

extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
			      struct sock *sk);

/*
 * reassembly.c
 */
extern const struct proto_ops inet6_stream_ops;
extern const struct proto_ops inet6_dgram_ops;

struct group_source_req;
struct group_filter;

extern int ip6_mc_source(int add, int omode, struct sock *sk,
			 struct group_source_req *pgsr);
extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
			 struct group_filter __user *optval,
			 int __user *optlen);

#ifdef CONFIG_PROC_FS
extern int  ac6_proc_init(struct net *net);
extern void ac6_proc_exit(struct net *net);
extern int  raw6_proc_init(void);
extern void raw6_proc_exit(void);
extern int  tcp6_proc_init(struct net *net);
extern void tcp6_proc_exit(struct net *net);
extern int  udp6_proc_init(struct net *net);
extern void udp6_proc_exit(struct net *net);
extern int  udplite6_proc_init(void);
extern void udplite6_proc_exit(void);
extern int  ipv6_misc_proc_init(void);
extern void ipv6_misc_proc_exit(void);
extern int snmp6_register_dev(struct inet6_dev *idev);
extern int snmp6_unregister_dev(struct inet6_dev *idev);

#else
static inline int ac6_proc_init(struct net *net) { return 0; }
static inline void ac6_proc_exit(struct net *net) { }
static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
#endif

#ifdef CONFIG_SYSCTL
extern ctl_table ipv6_route_table_template[];
extern ctl_table ipv6_icmp_table_template[];

extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
extern int ipv6_sysctl_register(void);
extern void ipv6_sysctl_unregister(void);
#endif

#endif /* __KERNEL__ */
#endif /* _NET_IPV6_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Linux INET6 implementation
	3	*
	4	* Authors:
	5	* Pedro Roque <roque@di.fc.ul.pt>
	6	*
	7	* $Id: ipv6.h,v 1.1 2002/05/20 15:13:07 jgrimm Exp $
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License
	11	* as published by the Free Software Foundation; either version
	12	* 2 of the License, or (at your option) any later version.
	13	*/
	14
	15	#ifndef _NET_IPV6_H
	16	#define _NET_IPV6_H
	17
	18	#include <linux/ipv6.h>
	19	#include <linux/hardirq.h>
20283d84	20	#include <net/if_inet6.h>
1da177e4 LT	21	#include <net/ndisc.h>
	22	#include <net/flow.h>
	23	#include <net/snmp.h>
	24
	25	#define SIN6_LEN_RFC2133 24
	26
	27	#define IPV6_MAXPLEN 65535
	28
	29	/*
	30	* NextHeader field of IPv6 header
	31	*/
	32
	33	#define NEXTHDR_HOP 0 /* Hop-by-hop option header. */
	34	#define NEXTHDR_TCP 6 /* TCP segment. */
	35	#define NEXTHDR_UDP 17 /* UDP message. */
	36	#define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */
	37	#define NEXTHDR_ROUTING 43 /* Routing header. */
	38	#define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */
	39	#define NEXTHDR_ESP 50 /* Encapsulating security payload. */
	40	#define NEXTHDR_AUTH 51 /* Authentication header. */
	41	#define NEXTHDR_ICMP 58 /* ICMP for IPv6. */
	42	#define NEXTHDR_NONE 59 /* No next header */
	43	#define NEXTHDR_DEST 60 /* Destination options header. */
2b741653	44	#define NEXTHDR_MOBILITY 135 /* Mobility header. */
1da177e4 LT	45
	46	#define NEXTHDR_MAX 255
	47
	48
	49
	50	#define IPV6_DEFAULT_HOPLIMIT 64
	51	#define IPV6_DEFAULT_MCASTHOPS 1
	52
	53	/*
	54	* Addr type
	55	*
	56	* type - unicast \| multicast
	57	* scope - local \| site \| global
	58	* v4 - compat
	59	* v4mapped
	60	* any
	61	* loopback
	62	*/
	63
	64	#define IPV6_ADDR_ANY 0x0000U
	65
	66	#define IPV6_ADDR_UNICAST 0x0001U
	67	#define IPV6_ADDR_MULTICAST 0x0002U
	68
	69	#define IPV6_ADDR_LOOPBACK 0x0010U
	70	#define IPV6_ADDR_LINKLOCAL 0x0020U
	71	#define IPV6_ADDR_SITELOCAL 0x0040U
	72
	73	#define IPV6_ADDR_COMPATv4 0x0080U
	74
	75	#define IPV6_ADDR_SCOPE_MASK 0x00f0U
	76
	77	#define IPV6_ADDR_MAPPED 0x1000U
	78	#define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */
	79
	80	/*
	81	* Addr scopes
	82	*/
	83	#ifdef __KERNEL__
	84	#define IPV6_ADDR_MC_SCOPE(a) \
	85	((a)->s6_addr[1] & 0x0f) /* nonstandard */
	86	#define __IPV6_ADDR_SCOPE_INVALID -1
	87	#endif
	88	#define IPV6_ADDR_SCOPE_NODELOCAL 0x01
	89	#define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
	90	#define IPV6_ADDR_SCOPE_SITELOCAL 0x05
	91	#define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
	92	#define IPV6_ADDR_SCOPE_GLOBAL 0x0e
	93
	94	/*
	95	* fragmentation header
	96	*/
	97
	98	struct frag_hdr {
44473a6b AV	99	__u8 nexthdr;
	100	__u8 reserved;
	101	__be16 frag_off;
	102	__be32 identification;
1da177e4 LT	103	};
	104
	105	#define IP6_MF 0x0001
	106
	107	#ifdef __KERNEL__
	108
	109	#include <net/sock.h>
	110
	111	/* sysctls */
1da177e4	112	extern int sysctl_mld_max_msf;
3d7cc2ba PE	113	extern struct ctl_path net_ipv6_ctl_path[];
3d7cc2ba PE	114
14878f75 DS	115	#define _DEVINC(statname, modifier, idev, field) \
14878f75 DS	116	({ \
a11d206d YH	117	struct inet6_dev *_idev = (idev); \
a11d206d YH	118	if (likely(_idev != NULL)) \
14878f75 DS	119	SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
14878f75 DS	120	SNMP_INC_STATS##modifier(statname##_statistics, (field)); \
a11d206d	121	})
14878f75	122
8e7999c4 PE	123	#define _DEVADD(statname, modifier, idev, field, val) \
	124	({ \
	125	struct inet6_dev *_idev = (idev); \
	126	if (likely(_idev != NULL)) \
	127	SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
	128	SNMP_ADD_STATS##modifier(statname##_statistics, (field), (val));\
	129	})
	130
14878f75 DS	131	/* MIBs */
	132	DECLARE_SNMP_STAT(struct ipstats_mib, ipv6_statistics);
	133
	134	#define IP6_INC_STATS(idev,field) _DEVINC(ipv6, , idev, field)
	135	#define IP6_INC_STATS_BH(idev,field) _DEVINC(ipv6, _BH, idev, field)
	136	#define IP6_INC_STATS_USER(idev,field) _DEVINC(ipv6, _USER, idev, field)
8e7999c4	137	#define IP6_ADD_STATS_BH(idev,field,val) _DEVADD(ipv6, _BH, idev, field, val)
14878f75	138
1da177e4	139	DECLARE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics);
14878f75 DS	140	DECLARE_SNMP_STAT(struct icmpv6msg_mib, icmpv6msg_statistics);
	141
	142	#define ICMP6_INC_STATS(idev, field) _DEVINC(icmpv6, , idev, field)
	143	#define ICMP6_INC_STATS_BH(idev, field) _DEVINC(icmpv6, _BH, idev, field)
	144	#define ICMP6_INC_STATS_USER(idev, field) _DEVINC(icmpv6, _USER, idev, field)
	145
14878f75 DS	146	#define ICMP6MSGOUT_INC_STATS(idev, field) \
	147	_DEVINC(icmpv6msg, , idev, field +256)
	148	#define ICMP6MSGOUT_INC_STATS_BH(idev, field) \
	149	_DEVINC(icmpv6msg, _BH, idev, field +256)
	150	#define ICMP6MSGOUT_INC_STATS_USER(idev, field) \
	151	_DEVINC(icmpv6msg, _USER, idev, field +256)
	152	#define ICMP6MSGIN_INC_STATS(idev, field) \
	153	_DEVINC(icmpv6msg, , idev, field)
	154	#define ICMP6MSGIN_INC_STATS_BH(idev, field) \
	155	_DEVINC(icmpv6msg, _BH, idev, field)
	156	#define ICMP6MSGIN_INC_STATS_USER(idev, field) \
	157	_DEVINC(icmpv6msg, _USER, idev, field)
	158
1da177e4 LT	159	struct ip6_ra_chain
	160	{
	161	struct ip6_ra_chain *next;
	162	struct sock *sk;
	163	int sel;
	164	void (destructor)(struct sock );
	165	};
	166
	167	extern struct ip6_ra_chain *ip6_ra_chain;
	168	extern rwlock_t ip6_ra_lock;
	169
	170	/*
	171	This structure is prepared by protocol, when parsing
	172	ancillary data and passed to IPv6.
	173	*/
	174
	175	struct ipv6_txoptions
	176	{
	177	/* Length of this structure */
	178	int tot_len;
	179
	180	/* length of extension headers */
	181
	182	__u16 opt_flen; /* after fragment hdr */
	183	__u16 opt_nflen; /* before fragment hdr */
	184
	185	struct ipv6_opt_hdr *hopopt;
	186	struct ipv6_opt_hdr *dst0opt;
	187	struct ipv6_rt_hdr srcrt; / Routing Header */
1da177e4 LT	188	struct ipv6_opt_hdr *dst1opt;
	189
	190	/* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
	191	};
	192
	193	struct ip6_flowlabel
	194	{
	195	struct ip6_flowlabel *next;
90bcaf7b	196	__be32 label;
db3459d1	197	atomic_t users;
1da177e4 LT	198	struct in6_addr dst;
1da177e4 LT	199	struct ipv6_txoptions *opt;
1da177e4 LT	200	unsigned long linger;
	201	u8 share;
	202	u32 owner;
	203	unsigned long lastuse;
	204	unsigned long expires;
60e8fbc4	205	struct net *fl_net;
1da177e4 LT	206	};
	207
	208	#define IPV6_FLOWINFO_MASK __constant_htonl(0x0FFFFFFF)
	209	#define IPV6_FLOWLABEL_MASK __constant_htonl(0x000FFFFF)
	210
	211	struct ipv6_fl_socklist
	212	{
	213	struct ipv6_fl_socklist *next;
	214	struct ip6_flowlabel *fl;
	215	};
	216
90bcaf7b	217	extern struct ip6_flowlabel fl6_sock_lookup(struct sock sk, __be32 label);
1da177e4 LT	218	extern struct ipv6_txoptions fl6_merge_options(struct ipv6_txoptions opt_space,
	219	struct ip6_flowlabel * fl,
	220	struct ipv6_txoptions * fopt);
	221	extern void fl6_free_socklist(struct sock *sk);
	222	extern int ipv6_flowlabel_opt(struct sock sk, char __user optval, int optlen);
0a3e78ac	223	extern int ip6_flowlabel_init(void);
1da177e4 LT	224	extern void ip6_flowlabel_cleanup(void);
	225
	226	static inline void fl6_sock_release(struct ip6_flowlabel *fl)
	227	{
	228	if (fl)
	229	atomic_dec(&fl->users);
	230	}
	231
	232	extern int ip6_ra_control(struct sock *sk, int sel,
	233	void (destructor)(struct sock ));
	234
	235
e5bbef20	236	extern int ipv6_parse_hopopts(struct sk_buff *skb);
1da177e4 LT	237
1da177e4 LT	238	extern struct ipv6_txoptions * ipv6_dup_options(struct sock sk, struct ipv6_txoptions opt);
333fad53 YH	239	extern struct ipv6_txoptions * ipv6_renew_options(struct sock sk, struct ipv6_txoptions opt,
	240	int newtype,
	241	struct ipv6_opt_hdr __user *newopt,
	242	int newoptlen);
df9890c3 YH	243	struct ipv6_txoptions ipv6_fixup_options(struct ipv6_txoptions opt_space,
df9890c3 YH	244	struct ipv6_txoptions *opt);
1da177e4	245
399c07de ACM	246	extern int ipv6_opt_accepted(struct sock sk, struct sk_buff skb);
399c07de ACM	247
e5a2bb84	248	int ip6_frag_nqueues(struct net *net);
6ddc0822	249	int ip6_frag_mem(struct net *net);
1da177e4 LT	250
	251	#define IPV6_FRAG_TIMEOUT (60HZ) / 60 seconds */
	252
b1cacb68 YH	253	extern int __ipv6_addr_type(const struct in6_addr *addr);
	254	static inline int ipv6_addr_type(const struct in6_addr *addr)
	255	{
	256	return __ipv6_addr_type(addr) & 0xffff;
	257	}
1da177e4 LT	258
	259	static inline int ipv6_addr_scope(const struct in6_addr *addr)
	260	{
b1cacb68 YH	261	return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
	262	}
	263
	264	static inline int __ipv6_addr_src_scope(int type)
	265	{
	266	return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
	267	}
	268
	269	static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
	270	{
	271	return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
1da177e4 LT	272	}
	273
	274	static inline int ipv6_addr_cmp(const struct in6_addr a1, const struct in6_addr a2)
	275	{
db3459d1	276	return memcmp(a1, a2, sizeof(struct in6_addr));
1da177e4 LT	277	}
1da177e4 LT	278
f2ffd9ee PM	279	static inline int
	280	ipv6_masked_addr_cmp(const struct in6_addr a1, const struct in6_addr m,
	281	const struct in6_addr *a2)
	282	{
fed85383 YH	283	return (!!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) \|
	284	((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) \|
	285	((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) \|
	286	((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])));
f2ffd9ee PM	287	}
f2ffd9ee PM	288
1da177e4 LT	289	static inline void ipv6_addr_copy(struct in6_addr a1, const struct in6_addr a2)
1da177e4 LT	290	{
db3459d1	291	memcpy(a1, a2, sizeof(struct in6_addr));
1da177e4 LT	292	}
	293
	294	static inline void ipv6_addr_prefix(struct in6_addr *pfx,
	295	const struct in6_addr *addr,
	296	int plen)
	297	{
	298	/* caller must guarantee 0 <= plen <= 128 */
	299	int o = plen >> 3,
	300	b = plen & 0x7;
	301
db3459d1	302	memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
1da177e4	303	memcpy(pfx->s6_addr, addr, o);
db3459d1	304	if (b != 0)
1da177e4	305	pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
1da177e4 LT	306	}
1da177e4 LT	307
1da177e4	308	static inline void ipv6_addr_set(struct in6_addr *addr,
48818f82 AV	309	__be32 w1, __be32 w2,
48818f82 AV	310	__be32 w3, __be32 w4)
1da177e4 LT	311	{
	312	addr->s6_addr32[0] = w1;
	313	addr->s6_addr32[1] = w2;
	314	addr->s6_addr32[2] = w3;
	315	addr->s6_addr32[3] = w4;
	316	}
1da177e4 LT	317
	318	static inline int ipv6_addr_equal(const struct in6_addr *a1,
	319	const struct in6_addr *a2)
	320	{
fed85383 YH	321	return (((a1->s6_addr32[0] ^ a2->s6_addr32[0]) \|
	322	(a1->s6_addr32[1] ^ a2->s6_addr32[1]) \|
	323	(a1->s6_addr32[2] ^ a2->s6_addr32[2]) \|
	324	(a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0);
1da177e4 LT	325	}
1da177e4 LT	326
48818f82	327	static inline int __ipv6_prefix_equal(const __be32 a1, const __be32 a2,
1da177e4 LT	328	unsigned int prefixlen)
	329	{
	330	unsigned pdw, pbi;
	331
	332	/* check complete u32 in prefix */
	333	pdw = prefixlen >> 5;
	334	if (pdw && memcmp(a1, a2, pdw << 2))
	335	return 0;
	336
	337	/* check incomplete u32 in prefix */
	338	pbi = prefixlen & 0x1f;
	339	if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
	340	return 0;
	341
	342	return 1;
	343	}
	344
	345	static inline int ipv6_prefix_equal(const struct in6_addr *a1,
	346	const struct in6_addr *a2,
	347	unsigned int prefixlen)
	348	{
	349	return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
	350	prefixlen);
	351	}
	352
2588fe1d	353	struct inet_frag_queue;
2588fe1d	354
c6fda282 PE	355	struct ip6_create_arg {
	356	__be32 id;
	357	struct in6_addr *src;
	358	struct in6_addr *dst;
	359	};
	360
	361	void ip6_frag_init(struct inet_frag_queue q, void a);
abd6523d	362	int ip6_frag_match(struct inet_frag_queue q, void a);
c6fda282	363
1da177e4 LT	364	static inline int ipv6_addr_any(const struct in6_addr *a)
	365	{
	366	return ((a->s6_addr32[0] \| a->s6_addr32[1] \|
	367	a->s6_addr32[2] \| a->s6_addr32[3] ) == 0);
	368	}
	369
e773e4fa BH	370	static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
e773e4fa BH	371	{
fed85383 YH	372	return ((a->s6_addr32[0] \| a->s6_addr32[1] \|
fed85383 YH	373	(a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0);
e773e4fa BH	374	}
e773e4fa BH	375
99cd07a5 JMT	376	/*
	377	* Check for a RFC 4843 ORCHID address
	378	* (Overlay Routable Cryptographic Hash Identifiers)
	379	*/
	380	static inline int ipv6_addr_orchid(const struct in6_addr *a)
	381	{
	382	return ((a->s6_addr32[0] & htonl(0xfffffff0))
	383	== htonl(0x20010010));
	384	}
	385
f15364bd AC	386	static inline void ipv6_addr_set_v4mapped(const __be32 addr,
	387	struct in6_addr *v4mapped)
	388	{
	389	ipv6_addr_set(v4mapped,
	390	0, 0,
	391	htonl(0x0000FFFF),
	392	addr);
	393	}
	394
971f359d YH	395	/*
	396	* find the first different bit between two addresses
	397	* length of address must be a multiple of 32bits
	398	*/
	399	static inline int __ipv6_addr_diff(const void token1, const void token2, int addrlen)
	400	{
ef296f56	401	const __be32 a1 = token1, a2 = token2;
971f359d YH	402	int i;
	403
	404	addrlen >>= 2;
	405
	406	for (i = 0; i < addrlen; i++) {
ef296f56 AV	407	__be32 xb = a1[i] ^ a2[i];
	408	if (xb)
	409	return i * 32 + 32 - fls(ntohl(xb));
971f359d YH	410	}
	411
	412	/*
	413	* we should never get to this point since that
	414	* would mean the addrs are equal
	415	*
	416	* However, we do get to it 8) And exacly, when
	417	* addresses are equal 8)
	418	*
	419	* ip route add 1111::/128 via ...
	420	* ip route add 1111::/64 via ...
	421	* and we are here.
	422	*
	423	* Ideally, this function should stop comparison
	424	* at prefix length. It does not, but it is still OK,
	425	* if returned value is greater than prefix length.
	426	* --ANK (980803)
	427	*/
	428	return (addrlen << 5);
	429	}
	430
	431	static inline int ipv6_addr_diff(const struct in6_addr a1, const struct in6_addr a2)
	432	{
	433	return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
	434	}
	435
1da177e4 LT	436	/*
	437	* Prototypes exported by ipv6
	438	*/
	439
	440	/*
	441	* rcv function (called from netdevice level)
	442	*/
	443
	444	extern int ipv6_rcv(struct sk_buff *skb,
	445	struct net_device *dev,
f2ccd8fa DM	446	struct packet_type *pt,
f2ccd8fa DM	447	struct net_device *orig_dev);
1da177e4	448
b05e1066 PM	449	extern int ip6_rcv_finish(struct sk_buff *skb);
b05e1066 PM	450
1da177e4 LT	451	/*
	452	* upper-layer output functions
	453	*/
	454	extern int ip6_xmit(struct sock *sk,
	455	struct sk_buff *skb,
	456	struct flowi *fl,
	457	struct ipv6_txoptions *opt,
	458	int ipfragok);
	459
	460	extern int ip6_nd_hdr(struct sock *sk,
	461	struct sk_buff *skb,
	462	struct net_device *dev,
9acd9f3a YH	463	const struct in6_addr *saddr,
9acd9f3a YH	464	const struct in6_addr *daddr,
1da177e4 LT	465	int proto, int len);
	466
	467	extern int ip6_find_1stfragopt(struct sk_buff skb, u8 *nexthdr);
	468
	469	extern int ip6_append_data(struct sock *sk,
	470	int getfrag(void from, char to, int offset, int len, int odd, struct sk_buff *skb),
	471	void *from,
	472	int length,
	473	int transhdrlen,
	474	int hlimit,
41a1f8ea	475	int tclass,
1da177e4 LT	476	struct ipv6_txoptions *opt,
	477	struct flowi *fl,
	478	struct rt6_info *rt,
	479	unsigned int flags);
	480
	481	extern int ip6_push_pending_frames(struct sock *sk);
	482
	483	extern void ip6_flush_pending_frames(struct sock *sk);
	484
	485	extern int ip6_dst_lookup(struct sock *sk,
	486	struct dst_entry **dst,
	487	struct flowi *fl);
14e50e57 DM	488	extern int ip6_dst_blackhole(struct sock *sk,
	489	struct dst_entry **dst,
	490	struct flowi *fl);
497c615a HX	491	extern int ip6_sk_dst_lookup(struct sock *sk,
	492	struct dst_entry **dst,
	493	struct flowi *fl);
1da177e4 LT	494
	495	/*
	496	* skb processing functions
	497	*/
	498
	499	extern int ip6_output(struct sk_buff *skb);
	500	extern int ip6_forward(struct sk_buff *skb);
	501	extern int ip6_input(struct sk_buff *skb);
	502	extern int ip6_mc_input(struct sk_buff *skb);
	503
ef76bc23 HX	504	extern int __ip6_local_out(struct sk_buff *skb);
	505	extern int ip6_local_out(struct sk_buff *skb);
	506
1da177e4 LT	507	/*
	508	* Extension header (options) processing
	509	*/
	510
1da177e4 LT	511	extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
	512	struct ipv6_txoptions *opt,
	513	u8 *proto,
	514	struct in6_addr **daddr_p);
	515	extern void ipv6_push_frag_opts(struct sk_buff *skb,
	516	struct ipv6_txoptions *opt,
	517	u8 *proto);
	518
	519	extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
0d3d077c	520	u8 *nexthdrp);
1da177e4 LT	521
	522	extern int ipv6_ext_hdr(u8 nexthdr);
	523
c61a4043 MN	524	extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
c61a4043 MN	525
1da177e4 LT	526	/*
	527	* socket options (ipv6_sockglue.c)
	528	*/
	529
	530	extern int ipv6_setsockopt(struct sock *sk, int level,
	531	int optname,
	532	char __user *optval,
	533	int optlen);
	534	extern int ipv6_getsockopt(struct sock *sk, int level,
	535	int optname,
	536	char __user *optval,
	537	int __user *optlen);
3fdadf7d DM	538	extern int compat_ipv6_setsockopt(struct sock *sk,
	539	int level,
	540	int optname,
	541	char __user *optval,
	542	int optlen);
	543	extern int compat_ipv6_getsockopt(struct sock *sk,
	544	int level,
	545	int optname,
	546	char __user *optval,
	547	int __user *optlen);
1da177e4	548
1da177e4 LT	549	extern int ip6_datagram_connect(struct sock *sk,
	550	struct sockaddr *addr, int addr_len);
	551
	552	extern int ipv6_recv_error(struct sock sk, struct msghdr msg, int len);
e69a4adc	553	extern void ipv6_icmp_error(struct sock sk, struct sk_buff skb, int err, __be16 port,
1da177e4 LT	554	u32 info, u8 *payload);
	555	extern void ipv6_local_error(struct sock sk, int err, struct flowi fl, u32 info);
	556
	557	extern int inet6_release(struct socket *sock);
	558	extern int inet6_bind(struct socket sock, struct sockaddr uaddr,
	559	int addr_len);
	560	extern int inet6_getname(struct socket sock, struct sockaddr uaddr,
	561	int *uaddr_len, int peer);
	562	extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
	563	unsigned long arg);
	564
d8313f5c ACM	565	extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
	566	struct sock *sk);
	567
1da177e4 LT	568	/*
	569	* reassembly.c
	570	*/
90ddc4f0 ED	571	extern const struct proto_ops inet6_stream_ops;
90ddc4f0 ED	572	extern const struct proto_ops inet6_dgram_ops;
20380731	573
14c85021 ACM	574	struct group_source_req;
	575	struct group_filter;
	576
20380731 ACM	577	extern int ip6_mc_source(int add, int omode, struct sock *sk,
	578	struct group_source_req *pgsr);
	579	extern int ip6_mc_msfilter(struct sock sk, struct group_filter gsf);
	580	extern int ip6_mc_msfget(struct sock sk, struct group_filter gsf,
	581	struct group_filter __user *optval,
	582	int __user *optlen);
	583
	584	#ifdef CONFIG_PROC_FS
6ab57e7e DL	585	extern int ac6_proc_init(struct net *net);
6ab57e7e DL	586	extern void ac6_proc_exit(struct net *net);
20380731 ACM	587	extern int raw6_proc_init(void);
20380731 ACM	588	extern void raw6_proc_exit(void);
6f8b13bc DL	589	extern int tcp6_proc_init(struct net *net);
6f8b13bc DL	590	extern void tcp6_proc_exit(struct net *net);
0c96d8c5 DL	591	extern int udp6_proc_init(struct net *net);
0c96d8c5 DL	592	extern void udp6_proc_exit(struct net *net);
ba4e58ec GR	593	extern int udplite6_proc_init(void);
ba4e58ec GR	594	extern void udplite6_proc_exit(void);
20380731 ACM	595	extern int ipv6_misc_proc_init(void);
20380731 ACM	596	extern void ipv6_misc_proc_exit(void);
7f7d9a6b HX	597	extern int snmp6_register_dev(struct inet6_dev *idev);
7f7d9a6b HX	598	extern int snmp6_unregister_dev(struct inet6_dev *idev);
20380731	599
7f7d9a6b	600	#else
6ab57e7e DL	601	static inline int ac6_proc_init(struct net *net) { return 0; }
	602	static inline void ac6_proc_exit(struct net *net) { }
	603	static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
	604	static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
20380731	605	#endif
1da177e4	606
20380731	607	#ifdef CONFIG_SYSCTL
760f2d01 DL	608	extern ctl_table ipv6_route_table_template[];
760f2d01 DL	609	extern ctl_table ipv6_icmp_table_template[];
1da177e4	610
6de1a910 DL	611	extern struct ctl_table ipv6_icmp_sysctl_init(struct net net);
6de1a910 DL	612	extern struct ctl_table ipv6_route_sysctl_init(struct net net);
291480c0	613	extern int ipv6_sysctl_register(void);
20380731 ACM	614	extern void ipv6_sysctl_unregister(void);
20380731 ACM	615	#endif
1da177e4	616
20380731 ACM	617	#endif /* __KERNEL__ */
20380731 ACM	618	#endif /* _NET_IPV6_H */