/* * 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__ #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)extern atomic_t inet6_sock_nr; 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); 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_SETstatic 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, struct packet_type *pt); /* * 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, 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, u8 *nexthdrp); 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; #endif /* __KERNEL__ */#endif /* _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/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__
#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)
extern atomic_t inet6_sock_nr;
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);
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,
struct packet_type *pt);
/*
* 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,
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,
u8 *nexthdrp);
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;
#endif /* __KERNEL__ */
#endif /* _NET_IPV6_H */