forked from luck/tmp_suning_uos_patched
b1cacb6820
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
569 lines
15 KiB
C
569 lines
15 KiB
C
/*
|
|
* 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 <linux/config.h>
|
|
#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);
|
|
extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
|
|
int newtype,
|
|
struct ipv6_opt_hdr __user *newopt,
|
|
int newoptlen);
|
|
|
|
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_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((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);
|
|
}
|
|
|
|
/*
|
|
* 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 __u32 *a1 = token1, *a2 = token2;
|
|
int i;
|
|
|
|
addrlen >>= 2;
|
|
|
|
for (i = 0; i < addrlen; i++) {
|
|
__u32 xb = a1[i] ^ a2[i];
|
|
if (xb) {
|
|
int j = 31;
|
|
|
|
xb = ntohl(xb);
|
|
while ((xb & (1 << j)) == 0)
|
|
j--;
|
|
|
|
return (i * 32 + 31 - j);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
|
|
/*
|
|
* 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);
|
|
|
|
/*
|
|
* 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;
|
|
|
|
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
|
|
|
|
#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 */
|