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/*
* Linux INET6 implementation
*
* Authors:
* Pedro Roque <roque@di.fc.ul.pt>
*
* $Id: ipv6.h,v 1.12 1998/07/15 05:05:02 davem 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 <asm/hardirq.h>
#include <net/ndisc.h>
#include <net/flow.h>
/*
* 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 | anycast
* 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_ANYCAST 0x0004U
#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 */
/*
* fragmentation header
*/
struct frag_hdr {
unsigned char nexthdr;
unsigned char reserved;
unsigned short frag_off;
__u32 identification;
};
#ifdef __KERNEL__
#include <net/sock.h>
extern struct ipv6_mib ipv6_statistics;
struct ipv6_frag {
__u16 offset;
__u16 len;
struct sk_buff *skb;
struct frag_hdr *fhdr;
struct ipv6_frag *next;
};
/*
* Equivalent of ipv4 struct ipq
*/
struct frag_queue {
struct frag_queue *next;
struct frag_queue *prev;
__u32 id; /* fragment id */
struct in6_addr saddr;
struct in6_addr daddr;
struct timer_list timer; /* expire timer */
struct ipv6_frag *fragments;
struct device *dev;
__u8 last_in; /* has last segment arrived? */
__u8 nexthdr;
__u8 *nhptr;
};
struct ipv6_tlvtype
{
u8 type;
u8 len;
};
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 int ip6_ra_control(struct sock *sk, int sel,
void (*destructor)(struct sock *));
extern int ip6_call_ra_chain(struct sk_buff *skb, int sel);
extern int ip6_dstopt_unknown(struct sk_buff *skb,
struct ipv6_tlvtype *hdr);
extern int ipv6_routing_header(struct sk_buff **skb,
struct device *dev,
__u8 *nhptr,
struct ipv6_options *opt);
extern int ipv6_reassembly(struct sk_buff **skb,
struct device *dev,
__u8 *nhptr,
struct ipv6_options *opt);
#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(struct in6_addr *addr);
extern __inline__ int ipv6_addr_scope(struct in6_addr *addr)
{
return ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
}
extern __inline__ int ipv6_addr_cmp(struct in6_addr *a1, struct in6_addr *a2)
{
return memcmp((void *) a1, (void *) a2, sizeof(struct in6_addr));
}
extern __inline__ void ipv6_addr_copy(struct in6_addr *a1, struct in6_addr *a2)
{
memcpy((void *) a1, (void *) a2, sizeof(struct in6_addr));
}
#ifndef __HAVE_ARCH_ADDR_SET
extern __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
extern __inline__ int ipv6_addr_any(struct in6_addr *a)
{
return ((a->s6_addr32[0] | a->s6_addr32[1] |
a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
}
extern __inline__ int gfp_any(void)
{
int pri = GFP_KERNEL;
if (in_interrupt())
pri = GFP_ATOMIC;
return pri;
}
/*
* Prototypes exported by ipv6
*/
/*
* rcv function (called from netdevice level)
*/
extern int ipv6_rcv(struct sk_buff *skb,
struct 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_options *opt);
extern int ip6_nd_hdr(struct sock *sk,
struct sk_buff *skb,
struct device *dev,
struct in6_addr *saddr,
struct in6_addr *daddr,
int proto, int len);
extern int ip6_build_xmit(struct sock *sk,
inet_getfrag_t getfrag,
const void *data,
struct flowi *fl,
unsigned length,
struct ipv6_options *opt,
int hlimit, int flags);
/*
* 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 int ipv6opt_bld_rthdr(struct sk_buff *skb,
struct ipv6_options *opt,
struct in6_addr *addr,
int proto);
extern int ipv6opt_srcrt_co(struct sockaddr_in6 *sin6,
int len,
struct ipv6_options *opt);
extern int ipv6opt_srcrt_cl(struct sockaddr_in6 *sin6,
int num_addrs,
struct ipv6_options *opt);
extern int ipv6opt_srt_tosin(struct ipv6_options *opt,
struct sockaddr_in6 *sin6,
int len);
extern void ipv6opt_free(struct ipv6_options *opt);
extern struct ipv6_opt_hdr * ipv6_skip_exthdr(struct ipv6_opt_hdr *hdr,
u8 *nexthdrp, int len);
/*
* socket options (ipv6_sockglue.c)
*/
extern int ipv6_setsockopt(struct sock *sk, int level,
int optname, char *optval,
int optlen);
extern int ipv6_getsockopt(struct sock *sk, int level,
int optname, char *optval,
int *optlen);
extern void ipv6_packet_init(void);
extern void ipv6_netdev_notif_init(void);
extern void ipv6_packet_cleanup(void);
extern void ipv6_netdev_notif_cleanup(void);
#endif /* __KERNEL__ */
#endif /* _NET_IPV6_H */
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