/* * Linux INET6 implementation * * Authors: * Pedro Roque * * $Id: ipv6.h,v 1.6 1997/04/01 02:22:58 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 #include #include #include /* * 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 extern struct ipv6_mib ipv6_statistics; struct ipv6_config { int forwarding; int hop_limit; int accept_ra; int accept_redirects; int nd_max_mcast_solicit; int nd_max_ucast_solicit; int nd_retrans_time; int nd_base_reachable_time; int nd_delay_probe_time; int autoconf; int dad_transmits; int rtr_solicits; int rtr_solicit_interval; int rtr_solicit_delay; int rt_cache_timeout; int rt_gc_period; }; extern struct ipv6_config ipv6_config; 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 timer_list timer; /* expire timer */ struct ipv6_frag *fragments; struct device *dev; __u8 last_in; /* has last segment arrived? */ __u8 nexthdr; __u8 *nhptr; }; 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 short length, struct ipv6_options *opt, int hlimit, int flags); /* * skb processing functions */ 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); /* * 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_init(void); extern void ipv6_cleanup(void); #endif #endif