1 #ifndef _NET_IP6_ROUTE_H 2 #define _NET_IP6_ROUTE_H 3 4 #define IP6_RT_PRIO_USER 1024 5 #define IP6_RT_PRIO_ADDRCONF 256 6 #define IP6_RT_PRIO_KERN 512 7 8 struct route_info { 9 __u8 type; 10 __u8 length; 11 __u8 prefix_len; 12 #if defined(__BIG_ENDIAN_BITFIELD) 13 __u8 reserved_h:3, 14 route_pref:2, 15 reserved_l:3; 16 #elif defined(__LITTLE_ENDIAN_BITFIELD) 17 __u8 reserved_l:3, 18 route_pref:2, 19 reserved_h:3; 20 #endif 21 __be32 lifetime; 22 __u8 prefix[0]; /* 0,8 or 16 */ 23 }; 24 25 #ifdef __KERNEL__ 26 27 #include <net/flow.h> 28 #include <net/ip6_fib.h> 29 #include <net/sock.h> 30 #include <linux/ip.h> 31 #include <linux/ipv6.h> 32 33 #define RT6_LOOKUP_F_IFACE 0x00000001 34 #define RT6_LOOKUP_F_REACHABLE 0x00000002 35 #define RT6_LOOKUP_F_HAS_SADDR 0x00000004 36 #define RT6_LOOKUP_F_SRCPREF_TMP 0x00000008 37 #define RT6_LOOKUP_F_SRCPREF_PUBLIC 0x00000010 38 #define RT6_LOOKUP_F_SRCPREF_COA 0x00000020 39 40 41 extern void ip6_route_input(struct sk_buff *skb); 42 43 extern struct dst_entry * ip6_route_output(struct net *net, 44 struct sock *sk, 45 struct flowi *fl); 46 47 extern int ip6_route_init(void); 48 extern void ip6_route_cleanup(void); 49 50 extern int ipv6_route_ioctl(struct net *net, 51 unsigned int cmd, 52 void __user *arg); 53 54 extern int ip6_route_add(struct fib6_config *cfg); 55 extern int ip6_ins_rt(struct rt6_info *); 56 extern int ip6_del_rt(struct rt6_info *); 57 58 extern struct rt6_info *rt6_lookup(struct net *net, 59 const struct in6_addr *daddr, 60 const struct in6_addr *saddr, 61 int oif, int flags); 62 63 extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev, 64 struct neighbour *neigh, 65 const struct in6_addr *addr); 66 extern int icmp6_dst_gc(void); 67 68 extern void fib6_force_start_gc(struct net *net); 69 70 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, 71 const struct in6_addr *addr, 72 int anycast); 73 74 extern int ip6_dst_hoplimit(struct dst_entry *dst); 75 76 /* 77 * support functions for ND 78 * 79 */ 80 extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr, 81 struct net_device *dev); 82 extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr, 83 struct net_device *dev, 84 unsigned int pref); 85 86 extern void rt6_purge_dflt_routers(struct net *net); 87 88 extern int rt6_route_rcv(struct net_device *dev, 89 u8 *opt, int len, 90 struct in6_addr *gwaddr); 91 92 extern void rt6_redirect(struct in6_addr *dest, 93 struct in6_addr *src, 94 struct in6_addr *saddr, 95 struct neighbour *neigh, 96 u8 *lladdr, 97 int on_link); 98 99 extern void rt6_pmtu_discovery(struct in6_addr *daddr, 100 struct in6_addr *saddr, 101 struct net_device *dev, 102 u32 pmtu); 103 104 struct netlink_callback; 105 106 struct rt6_rtnl_dump_arg 107 { 108 struct sk_buff *skb; 109 struct netlink_callback *cb; 110 struct net *net; 111 }; 112 113 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg); 114 extern void rt6_ifdown(struct net *net, struct net_device *dev); 115 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu); 116 117 118 /* 119 * Store a destination cache entry in a socket 120 */ 121 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst, 122 struct in6_addr *daddr, struct in6_addr *saddr) 123 { 124 struct ipv6_pinfo *np = inet6_sk(sk); 125 struct rt6_info *rt = (struct rt6_info *) dst; 126 127 sk_setup_caps(sk, dst); 128 np->daddr_cache = daddr; 129 #ifdef CONFIG_IPV6_SUBTREES 130 np->saddr_cache = saddr; 131 #endif 132 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0; 133 } 134 135 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst, 136 struct in6_addr *daddr, struct in6_addr *saddr) 137 { 138 write_lock(&sk->sk_dst_lock); 139 __ip6_dst_store(sk, dst, daddr, saddr); 140 write_unlock(&sk->sk_dst_lock); 141 } 142 143 static inline int ipv6_unicast_destination(struct sk_buff *skb) 144 { 145 struct rt6_info *rt = (struct rt6_info *) skb_dst(skb); 146 147 return rt->rt6i_flags & RTF_LOCAL; 148 } 149 150 #endif 151 #endif 152