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/*
* 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/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_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 {
unsigned char nexthdr ;
unsigned char reserved ;
unsigned short frag_off ;
__u32 identification ;
} ;
# define IP6_MF 0x0001
# ifdef __KERNEL__
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# include <linux/config.h>
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# include <net/sock.h>
/* sysctls */
extern int sysctl_ipv6_bindv6only ;
extern int sysctl_mld_max_msf ;
/* MIBs */
DECLARE_SNMP_STAT ( struct ipstats_mib , ipv6_statistics ) ;
# define IP6_INC_STATS(field) SNMP_INC_STATS(ipv6_statistics, field)
# define IP6_INC_STATS_BH(field) SNMP_INC_STATS_BH(ipv6_statistics, field)
# define IP6_INC_STATS_USER(field) SNMP_INC_STATS_USER(ipv6_statistics, field)
DECLARE_SNMP_STAT ( struct icmpv6_mib , icmpv6_statistics ) ;
# define ICMP6_INC_STATS(idev, field) ({ \
struct inet6_dev * _idev = ( idev ) ; \
if ( likely ( _idev ! = NULL ) ) \
SNMP_INC_STATS ( idev - > stats . icmpv6 , field ) ; \
SNMP_INC_STATS ( icmpv6_statistics , field ) ; \
} )
# define ICMP6_INC_STATS_BH(idev, field) ({ \
struct inet6_dev * _idev = ( idev ) ; \
if ( likely ( _idev ! = NULL ) ) \
SNMP_INC_STATS_BH ( ( _idev ) - > stats . icmpv6 , field ) ; \
SNMP_INC_STATS_BH ( icmpv6_statistics , field ) ; \
} )
# define ICMP6_INC_STATS_USER(idev, field) ({ \
struct inet6_dev * _idev = ( idev ) ; \
if ( likely ( _idev ! = NULL ) ) \
SNMP_INC_STATS_USER ( _idev - > stats . icmpv6 , field ) ; \
SNMP_INC_STATS_USER ( icmpv6_statistics , 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 ) ; \
} )
DECLARE_SNMP_STAT ( struct udp_mib , udp_stats_in6 ) ;
# define UDP6_INC_STATS(field) SNMP_INC_STATS(udp_stats_in6, field)
# define UDP6_INC_STATS_BH(field) SNMP_INC_STATS_BH(udp_stats_in6, field)
# define UDP6_INC_STATS_USER(field) SNMP_INC_STATS_USER(udp_stats_in6, field)
int snmp6_register_dev ( struct inet6_dev * idev ) ;
int snmp6_unregister_dev ( struct inet6_dev * idev ) ;
int snmp6_alloc_dev ( struct inet6_dev * idev ) ;
int snmp6_free_dev ( struct inet6_dev * idev ) ;
int snmp6_mib_init ( void * ptr [ 2 ] , size_t mibsize , size_t mibalign ) ;
void snmp6_mib_free ( void * ptr [ 2 ] ) ;
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 ;
u32 label ;
struct in6_addr dst ;
struct ipv6_txoptions * opt ;
atomic_t users ;
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 , u32 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 , int ) ;
extern struct ipv6_txoptions * ipv6_dup_options ( struct sock * sk , struct ipv6_txoptions * opt ) ;
[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).
Support several new socket options / ancillary data:
IPV6_RECVPKTINFO, IPV6_PKTINFO,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
IPV6_RECVRTHDR, IPV6_RTHDR,
IPV6_RECVHOPOPTS, IPV6_HOPOPTS
Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2005-09-08 04:59:17 +04:00
extern struct ipv6_txoptions * ipv6_renew_options ( struct sock * sk , struct ipv6_txoptions * opt ,
int newtype ,
struct ipv6_opt_hdr __user * newopt ,
int newoptlen ) ;
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extern int ip6_frag_nqueues ;
extern atomic_t ip6_frag_mem ;
# 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_scope ( const struct in6_addr * addr )
{
return ipv6_addr_type ( addr ) & IPV6_ADDR_SCOPE_MASK ;
}
static inline int ipv6_addr_cmp ( const struct in6_addr * a1 , const struct in6_addr * a2 )
{
return memcmp ( ( const void * ) a1 , ( const void * ) a2 , sizeof ( struct in6_addr ) ) ;
}
static inline void ipv6_addr_copy ( struct in6_addr * a1 , const struct in6_addr * a2 )
{
memcpy ( ( void * ) a1 , ( const void * ) 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 ;
memcpy ( pfx - > s6_addr , addr , o ) ;
if ( b ! = 0 ) {
pfx - > s6_addr [ o ] = addr - > s6_addr [ o ] & ( 0xff00 > > b ) ;
o + + ;
}
if ( o < 16 )
memset ( pfx - > s6_addr + o , 0 , 16 - o ) ;
}
# ifndef __HAVE_ARCH_ADDR_SET
static inline void ipv6_addr_set ( struct in6_addr * addr ,
__u32 w1 , __u32 w2 ,
__u32 w3 , __u32 w4 )
{
addr - > s6_addr32 [ 0 ] = w1 ;
addr - > s6_addr32 [ 1 ] = w2 ;
addr - > s6_addr32 [ 2 ] = w3 ;
addr - > s6_addr32 [ 3 ] = w4 ;
}
# endif
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 u32 * a1 , const u32 * 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 ) ;
}
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 ) ;
}
/*
* Prototypes exported by ipv6
*/
/*
* rcv function ( called from netdevice level )
*/
extern int ipv6_rcv ( struct sk_buff * skb ,
struct net_device * dev ,
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struct packet_type * pt ,
struct net_device * orig_dev ) ;
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/*
* 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 ,
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int tclass ,
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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 ) ;
/*
* 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 ,
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u8 * nexthdrp ) ;
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extern int ipv6_ext_hdr ( u8 nexthdr ) ;
extern struct ipv6_txoptions * ipv6_invert_rthdr ( struct sock * sk ,
struct ipv6_rt_hdr * hdr ) ;
/*
* 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 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 , u16 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 ) ;
/*
* reassembly . c
*/
extern int sysctl_ip6frag_high_thresh ;
extern int sysctl_ip6frag_low_thresh ;
extern int sysctl_ip6frag_time ;
extern int sysctl_ip6frag_secret_interval ;
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extern struct proto_ops inet6_stream_ops ;
extern struct proto_ops inet6_dgram_ops ;
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 ipv6_misc_proc_init ( void ) ;
extern void ipv6_misc_proc_exit ( void ) ;
extern struct rt6_statistics rt6_stats ;
# endif
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# ifdef CONFIG_SYSCTL
extern ctl_table ipv6_route_table [ ] ;
extern ctl_table ipv6_icmp_table [ ] ;
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extern void ipv6_sysctl_register ( void ) ;
extern void ipv6_sysctl_unregister ( void ) ;
# endif
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# endif /* __KERNEL__ */
# endif /* _NET_IPV6_H */