[net-next-2.6.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_ipv6_bindv6only;
extern int sysctl_mld_max_msf;

#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 ICMP6_INC_STATS_OFFSET_BH(idev, field, offset)	({			\
	struct inet6_dev *_idev = idev;						\
	__typeof__(offset) _offset = (offset);					\
	if (likely(_idev != NULL))						\
		SNMP_INC_STATS_OFFSET_BH(_idev->stats.icmpv6, field, _offset);	\
	SNMP_INC_STATS_OFFSET_BH(icmpv6_statistics, field, _offset);    	\
})

#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)

DECLARE_SNMP_STAT(struct udp_mib, udp_stats_in6);
DECLARE_SNMP_STAT(struct udp_mib, udplite_stats_in6);
#define UDP6_INC_STATS_BH(field, is_udplite) 			      do  {  \
	if (is_udplite) SNMP_INC_STATS_BH(udplite_stats_in6, field);         \
	else		SNMP_INC_STATS_BH(udp_stats_in6, field);    } while(0)
#define UDP6_INC_STATS_USER(field, is_udplite)			       do {    \
	if (is_udplite) SNMP_INC_STATS_USER(udplite_stats_in6, field);         \
	else		SNMP_INC_STATS_USER(udp_stats_in6, field);    } while(0)

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;
};

#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 void			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(void);
int ip6_frag_mem(void);

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

/*
 *	Function prototype for build_xmit
 */

typedef int		(*inet_getfrag_t) (const void *data,
					   struct in6_addr *addr,
					   char *,
					   unsigned int, unsigned int);

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)
{
	unsigned int i;

	for (i = 0; i < 4; i++)
		if ((a1->s6_addr32[i] ^ a2->s6_addr32[i]) & m->s6_addr32[i])
			return 1;
	return 0;
}

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]);
}

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;
int ip6_frag_equal(struct inet_frag_queue *q1, struct inet_frag_queue *q2);

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]) == 0 &&
		 a->s6_addr32[2] == htonl(0x0000ffff));
}

/*
 * 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,
					   struct in6_addr *saddr,
					   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);

/*
 *	Extension header (options) processing
 */

extern u8 *			ipv6_build_nfrag_opts(struct sk_buff *skb,
						      u8 *prev_hdr,
						      struct ipv6_txoptions *opt,
						      struct in6_addr *daddr,
						      u32 jumbolen);
extern u8 *			ipv6_build_frag_opts(struct sk_buff *skb,
						     u8 *prev_hdr,
						     struct ipv6_txoptions *opt);
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 void			ipv6_packet_init(void);

extern void			ipv6_packet_cleanup(void);

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
 */
struct inet_frags_ctl;
extern struct inet_frags_ctl ip6_frags_ctl;

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(void);
extern void ac6_proc_exit(void);
extern int  raw6_proc_init(void);
extern void raw6_proc_exit(void);
extern int  tcp6_proc_init(void);
extern void tcp6_proc_exit(void);
extern int  udp6_proc_init(void);
extern void udp6_proc_exit(void);
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);

extern struct rt6_statistics rt6_stats;
#else
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[];
extern ctl_table ipv6_icmp_table[];

extern void 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 */
	112	extern int sysctl_ipv6_bindv6only;
	113	extern int sysctl_mld_max_msf;
	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
1da177e4 LT	146	#define ICMP6_INC_STATS_OFFSET_BH(idev, field, offset) ({ \
	147	struct inet6_dev *_idev = idev; \
	148	__typeof__(offset) _offset = (offset); \
	149	if (likely(_idev != NULL)) \
	150	SNMP_INC_STATS_OFFSET_BH(_idev->stats.icmpv6, field, _offset); \
	151	SNMP_INC_STATS_OFFSET_BH(icmpv6_statistics, field, _offset); \
	152	})
14878f75 DS	153
	154	#define ICMP6MSGOUT_INC_STATS(idev, field) \
	155	_DEVINC(icmpv6msg, , idev, field +256)
	156	#define ICMP6MSGOUT_INC_STATS_BH(idev, field) \
	157	_DEVINC(icmpv6msg, _BH, idev, field +256)
	158	#define ICMP6MSGOUT_INC_STATS_USER(idev, field) \
	159	_DEVINC(icmpv6msg, _USER, idev, field +256)
	160	#define ICMP6MSGIN_INC_STATS(idev, field) \
	161	_DEVINC(icmpv6msg, , idev, field)
	162	#define ICMP6MSGIN_INC_STATS_BH(idev, field) \
	163	_DEVINC(icmpv6msg, _BH, idev, field)
	164	#define ICMP6MSGIN_INC_STATS_USER(idev, field) \
	165	_DEVINC(icmpv6msg, _USER, idev, field)
	166
1da177e4	167	DECLARE_SNMP_STAT(struct udp_mib, udp_stats_in6);
ba4e58ec GR	168	DECLARE_SNMP_STAT(struct udp_mib, udplite_stats_in6);
	169	#define UDP6_INC_STATS_BH(field, is_udplite) do { \
	170	if (is_udplite) SNMP_INC_STATS_BH(udplite_stats_in6, field); \
	171	else SNMP_INC_STATS_BH(udp_stats_in6, field); } while(0)
	172	#define UDP6_INC_STATS_USER(field, is_udplite) do { \
	173	if (is_udplite) SNMP_INC_STATS_USER(udplite_stats_in6, field); \
	174	else SNMP_INC_STATS_USER(udp_stats_in6, field); } while(0)
1da177e4	175
1da177e4 LT	176	struct ip6_ra_chain
	177	{
	178	struct ip6_ra_chain *next;
	179	struct sock *sk;
	180	int sel;
	181	void (destructor)(struct sock );
	182	};
	183
	184	extern struct ip6_ra_chain *ip6_ra_chain;
	185	extern rwlock_t ip6_ra_lock;
	186
	187	/*
	188	This structure is prepared by protocol, when parsing
	189	ancillary data and passed to IPv6.
	190	*/
	191
	192	struct ipv6_txoptions
	193	{
	194	/* Length of this structure */
	195	int tot_len;
	196
	197	/* length of extension headers */
	198
	199	__u16 opt_flen; /* after fragment hdr */
	200	__u16 opt_nflen; /* before fragment hdr */
	201
	202	struct ipv6_opt_hdr *hopopt;
	203	struct ipv6_opt_hdr *dst0opt;
	204	struct ipv6_rt_hdr srcrt; / Routing Header */
1da177e4 LT	205	struct ipv6_opt_hdr *dst1opt;
	206
	207	/* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
	208	};
	209
	210	struct ip6_flowlabel
	211	{
	212	struct ip6_flowlabel *next;
90bcaf7b	213	__be32 label;
db3459d1	214	atomic_t users;
1da177e4 LT	215	struct in6_addr dst;
1da177e4 LT	216	struct ipv6_txoptions *opt;
1da177e4 LT	217	unsigned long linger;
	218	u8 share;
	219	u32 owner;
	220	unsigned long lastuse;
	221	unsigned long expires;
	222	};
	223
	224	#define IPV6_FLOWINFO_MASK __constant_htonl(0x0FFFFFFF)
	225	#define IPV6_FLOWLABEL_MASK __constant_htonl(0x000FFFFF)
	226
	227	struct ipv6_fl_socklist
	228	{
	229	struct ipv6_fl_socklist *next;
	230	struct ip6_flowlabel *fl;
	231	};
	232
90bcaf7b	233	extern struct ip6_flowlabel fl6_sock_lookup(struct sock sk, __be32 label);
1da177e4 LT	234	extern struct ipv6_txoptions fl6_merge_options(struct ipv6_txoptions opt_space,
	235	struct ip6_flowlabel * fl,
	236	struct ipv6_txoptions * fopt);
	237	extern void fl6_free_socklist(struct sock *sk);
	238	extern int ipv6_flowlabel_opt(struct sock sk, char __user optval, int optlen);
	239	extern void ip6_flowlabel_init(void);
	240	extern void ip6_flowlabel_cleanup(void);
	241
	242	static inline void fl6_sock_release(struct ip6_flowlabel *fl)
	243	{
	244	if (fl)
	245	atomic_dec(&fl->users);
	246	}
	247
	248	extern int ip6_ra_control(struct sock *sk, int sel,
	249	void (destructor)(struct sock ));
	250
	251
e5bbef20	252	extern int ipv6_parse_hopopts(struct sk_buff *skb);
1da177e4 LT	253
1da177e4 LT	254	extern struct ipv6_txoptions * ipv6_dup_options(struct sock sk, struct ipv6_txoptions opt);
333fad53 YH	255	extern struct ipv6_txoptions * ipv6_renew_options(struct sock sk, struct ipv6_txoptions opt,
	256	int newtype,
	257	struct ipv6_opt_hdr __user *newopt,
	258	int newoptlen);
df9890c3 YH	259	struct ipv6_txoptions ipv6_fixup_options(struct ipv6_txoptions opt_space,
df9890c3 YH	260	struct ipv6_txoptions *opt);
1da177e4	261
399c07de ACM	262	extern int ipv6_opt_accepted(struct sock sk, struct sk_buff skb);
399c07de ACM	263
7eb95156 PE	264	int ip6_frag_nqueues(void);
7eb95156 PE	265	int ip6_frag_mem(void);
1da177e4 LT	266
	267	#define IPV6_FRAG_TIMEOUT (60HZ) / 60 seconds */
	268
	269	/*
	270	* Function prototype for build_xmit
	271	*/
	272
	273	typedef int (inet_getfrag_t) (const void data,
	274	struct in6_addr *addr,
	275	char *,
	276	unsigned int, unsigned int);
	277
b1cacb68 YH	278	extern int __ipv6_addr_type(const struct in6_addr *addr);
	279	static inline int ipv6_addr_type(const struct in6_addr *addr)
	280	{
	281	return __ipv6_addr_type(addr) & 0xffff;
	282	}
1da177e4 LT	283
	284	static inline int ipv6_addr_scope(const struct in6_addr *addr)
	285	{
b1cacb68 YH	286	return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
	287	}
	288
	289	static inline int __ipv6_addr_src_scope(int type)
	290	{
	291	return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
	292	}
	293
	294	static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
	295	{
	296	return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
1da177e4 LT	297	}
	298
	299	static inline int ipv6_addr_cmp(const struct in6_addr a1, const struct in6_addr a2)
	300	{
db3459d1	301	return memcmp(a1, a2, sizeof(struct in6_addr));
1da177e4 LT	302	}
1da177e4 LT	303
f2ffd9ee PM	304	static inline int
	305	ipv6_masked_addr_cmp(const struct in6_addr a1, const struct in6_addr m,
	306	const struct in6_addr *a2)
	307	{
	308	unsigned int i;
	309
	310	for (i = 0; i < 4; i++)
	311	if ((a1->s6_addr32[i] ^ a2->s6_addr32[i]) & m->s6_addr32[i])
	312	return 1;
	313	return 0;
	314	}
	315
1da177e4 LT	316	static inline void ipv6_addr_copy(struct in6_addr a1, const struct in6_addr a2)
1da177e4 LT	317	{
db3459d1	318	memcpy(a1, a2, sizeof(struct in6_addr));
1da177e4 LT	319	}
	320
	321	static inline void ipv6_addr_prefix(struct in6_addr *pfx,
	322	const struct in6_addr *addr,
	323	int plen)
	324	{
	325	/* caller must guarantee 0 <= plen <= 128 */
	326	int o = plen >> 3,
	327	b = plen & 0x7;
	328
db3459d1	329	memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
1da177e4	330	memcpy(pfx->s6_addr, addr, o);
db3459d1	331	if (b != 0)
1da177e4	332	pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
1da177e4 LT	333	}
1da177e4 LT	334
1da177e4	335	static inline void ipv6_addr_set(struct in6_addr *addr,
48818f82 AV	336	__be32 w1, __be32 w2,
48818f82 AV	337	__be32 w3, __be32 w4)
1da177e4 LT	338	{
	339	addr->s6_addr32[0] = w1;
	340	addr->s6_addr32[1] = w2;
	341	addr->s6_addr32[2] = w3;
	342	addr->s6_addr32[3] = w4;
	343	}
1da177e4 LT	344
	345	static inline int ipv6_addr_equal(const struct in6_addr *a1,
	346	const struct in6_addr *a2)
	347	{
	348	return (a1->s6_addr32[0] == a2->s6_addr32[0] &&
	349	a1->s6_addr32[1] == a2->s6_addr32[1] &&
	350	a1->s6_addr32[2] == a2->s6_addr32[2] &&
	351	a1->s6_addr32[3] == a2->s6_addr32[3]);
	352	}
	353
48818f82	354	static inline int __ipv6_prefix_equal(const __be32 a1, const __be32 a2,
1da177e4 LT	355	unsigned int prefixlen)
	356	{
	357	unsigned pdw, pbi;
	358
	359	/* check complete u32 in prefix */
	360	pdw = prefixlen >> 5;
	361	if (pdw && memcmp(a1, a2, pdw << 2))
	362	return 0;
	363
	364	/* check incomplete u32 in prefix */
	365	pbi = prefixlen & 0x1f;
	366	if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
	367	return 0;
	368
	369	return 1;
	370	}
	371
	372	static inline int ipv6_prefix_equal(const struct in6_addr *a1,
	373	const struct in6_addr *a2,
	374	unsigned int prefixlen)
	375	{
	376	return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
	377	prefixlen);
	378	}
	379
2588fe1d PE	380	struct inet_frag_queue;
	381	int ip6_frag_equal(struct inet_frag_queue q1, struct inet_frag_queue q2);
	382
1da177e4 LT	383	static inline int ipv6_addr_any(const struct in6_addr *a)
	384	{
	385	return ((a->s6_addr32[0] \| a->s6_addr32[1] \|
	386	a->s6_addr32[2] \| a->s6_addr32[3] ) == 0);
	387	}
	388
e773e4fa BH	389	static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
	390	{
	391	return ((a->s6_addr32[0] \| a->s6_addr32[1]) == 0 &&
	392	a->s6_addr32[2] == htonl(0x0000ffff));
	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,
	463	struct in6_addr *saddr,
	464	struct in6_addr *daddr,
	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
	504	/*
	505	* Extension header (options) processing
	506	*/
	507
	508	extern u8 * ipv6_build_nfrag_opts(struct sk_buff *skb,
	509	u8 *prev_hdr,
	510	struct ipv6_txoptions *opt,
	511	struct in6_addr *daddr,
	512	u32 jumbolen);
	513	extern u8 * ipv6_build_frag_opts(struct sk_buff *skb,
	514	u8 *prev_hdr,
	515	struct ipv6_txoptions *opt);
	516	extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
	517	struct ipv6_txoptions *opt,
	518	u8 *proto,
	519	struct in6_addr **daddr_p);
	520	extern void ipv6_push_frag_opts(struct sk_buff *skb,
	521	struct ipv6_txoptions *opt,
	522	u8 *proto);
	523
	524	extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
0d3d077c	525	u8 *nexthdrp);
1da177e4 LT	526
	527	extern int ipv6_ext_hdr(u8 nexthdr);
	528
c61a4043 MN	529	extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
c61a4043 MN	530
1da177e4 LT	531	/*
	532	* socket options (ipv6_sockglue.c)
	533	*/
	534
	535	extern int ipv6_setsockopt(struct sock *sk, int level,
	536	int optname,
	537	char __user *optval,
	538	int optlen);
	539	extern int ipv6_getsockopt(struct sock *sk, int level,
	540	int optname,
	541	char __user *optval,
	542	int __user *optlen);
3fdadf7d DM	543	extern int compat_ipv6_setsockopt(struct sock *sk,
	544	int level,
	545	int optname,
	546	char __user *optval,
	547	int optlen);
	548	extern int compat_ipv6_getsockopt(struct sock *sk,
	549	int level,
	550	int optname,
	551	char __user *optval,
	552	int __user *optlen);
1da177e4 LT	553
	554	extern void ipv6_packet_init(void);
	555
	556	extern void ipv6_packet_cleanup(void);
	557
	558	extern int ip6_datagram_connect(struct sock *sk,
	559	struct sockaddr *addr, int addr_len);
	560
	561	extern int ipv6_recv_error(struct sock sk, struct msghdr msg, int len);
e69a4adc	562	extern void ipv6_icmp_error(struct sock sk, struct sk_buff skb, int err, __be16 port,
1da177e4 LT	563	u32 info, u8 *payload);
	564	extern void ipv6_local_error(struct sock sk, int err, struct flowi fl, u32 info);
	565
	566	extern int inet6_release(struct socket *sock);
	567	extern int inet6_bind(struct socket sock, struct sockaddr uaddr,
	568	int addr_len);
	569	extern int inet6_getname(struct socket sock, struct sockaddr uaddr,
	570	int *uaddr_len, int peer);
	571	extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
	572	unsigned long arg);
	573
d8313f5c ACM	574	extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
	575	struct sock *sk);
	576
1da177e4 LT	577	/*
	578	* reassembly.c
	579	*/
04128f23 PE	580	struct inet_frags_ctl;
04128f23 PE	581	extern struct inet_frags_ctl ip6_frags_ctl;
1da177e4	582
90ddc4f0 ED	583	extern const struct proto_ops inet6_stream_ops;
90ddc4f0 ED	584	extern const struct proto_ops inet6_dgram_ops;
20380731	585
14c85021 ACM	586	struct group_source_req;
	587	struct group_filter;
	588
20380731 ACM	589	extern int ip6_mc_source(int add, int omode, struct sock *sk,
	590	struct group_source_req *pgsr);
	591	extern int ip6_mc_msfilter(struct sock sk, struct group_filter gsf);
	592	extern int ip6_mc_msfget(struct sock sk, struct group_filter gsf,
	593	struct group_filter __user *optval,
	594	int __user *optlen);
	595
	596	#ifdef CONFIG_PROC_FS
	597	extern int ac6_proc_init(void);
	598	extern void ac6_proc_exit(void);
	599	extern int raw6_proc_init(void);
	600	extern void raw6_proc_exit(void);
	601	extern int tcp6_proc_init(void);
	602	extern void tcp6_proc_exit(void);
	603	extern int udp6_proc_init(void);
	604	extern void udp6_proc_exit(void);
ba4e58ec GR	605	extern int udplite6_proc_init(void);
ba4e58ec GR	606	extern void udplite6_proc_exit(void);
20380731 ACM	607	extern int ipv6_misc_proc_init(void);
20380731 ACM	608	extern void ipv6_misc_proc_exit(void);
7f7d9a6b HX	609	extern int snmp6_register_dev(struct inet6_dev *idev);
7f7d9a6b HX	610	extern int snmp6_unregister_dev(struct inet6_dev *idev);
20380731 ACM	611
20380731 ACM	612	extern struct rt6_statistics rt6_stats;
7f7d9a6b HX	613	#else
	614	static inline int snmp6_register_dev(struct inet6_dev *idev)
	615	{
	616	return 0;
	617	}
	618
	619	static inline int snmp6_unregister_dev(struct inet6_dev *idev)
	620	{
	621	return 0;
	622	}
20380731	623	#endif
1da177e4	624
20380731 ACM	625	#ifdef CONFIG_SYSCTL
	626	extern ctl_table ipv6_route_table[];
	627	extern ctl_table ipv6_icmp_table[];
1da177e4	628
20380731 ACM	629	extern void ipv6_sysctl_register(void);
	630	extern void ipv6_sysctl_unregister(void);
	631	#endif
1da177e4	632
20380731 ACM	633	#endif /* __KERNEL__ */
20380731 ACM	634	#endif /* _NET_IPV6_H */