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 #ifdef CONFIG_IPV6_MULTIPLE_TABLES 42 extern struct rt6_info *ip6_prohibit_entry; 43 extern struct rt6_info *ip6_blk_hole_entry; 44 #endif 45 46 extern void ip6_route_input(struct sk_buff *skb); 47 48 extern struct dst_entry * ip6_route_output(struct net *net, 49 struct sock *sk, 50 struct flowi *fl); 51 52 extern int ip6_route_init(void); 53 extern void ip6_route_cleanup(void); 54 55 extern int ipv6_route_ioctl(struct net *net, 56 unsigned int cmd, 57 void __user *arg); 58 59 extern int ip6_route_add(struct fib6_config *cfg); 60 extern int ip6_ins_rt(struct rt6_info *); 61 extern int ip6_del_rt(struct rt6_info *); 62 63 extern struct rt6_info *rt6_lookup(struct net *net, 64 const struct in6_addr *daddr, 65 const struct in6_addr *saddr, 66 int oif, int flags); 67 68 extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev, 69 struct neighbour *neigh, 70 const struct in6_addr *addr); 71 extern int icmp6_dst_gc(int *more); 72 73 extern void fib6_force_start_gc(struct net *net); 74 75 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, 76 const struct in6_addr *addr, 77 int anycast); 78 79 extern int ip6_dst_hoplimit(struct dst_entry *dst); 80 81 /* 82 * support functions for ND 83 * 84 */ 85 extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr, 86 struct net_device *dev); 87 extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr, 88 struct net_device *dev, 89 unsigned int pref); 90 91 extern void rt6_purge_dflt_routers(struct net *net); 92 93 extern int rt6_route_rcv(struct net_device *dev, 94 u8 *opt, int len, 95 struct in6_addr *gwaddr); 96 97 extern void rt6_redirect(struct in6_addr *dest, 98 struct in6_addr *src, 99 struct in6_addr *saddr, 100 struct neighbour *neigh, 101 u8 *lladdr, 102 int on_link); 103 104 extern void rt6_pmtu_discovery(struct in6_addr *daddr, 105 struct in6_addr *saddr, 106 struct net_device *dev, 107 u32 pmtu); 108 109 struct netlink_callback; 110 111 struct rt6_rtnl_dump_arg 112 { 113 struct sk_buff *skb; 114 struct netlink_callback *cb; 115 }; 116 117 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg); 118 extern void rt6_ifdown(struct net *net, struct net_device *dev); 119 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu); 120 121 extern rwlock_t rt6_lock; 122 123 /* 124 * Store a destination cache entry in a socket 125 */ 126 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst, 127 struct in6_addr *daddr, struct in6_addr *saddr) 128 { 129 struct ipv6_pinfo *np = inet6_sk(sk); 130 struct rt6_info *rt = (struct rt6_info *) dst; 131 132 sk_setup_caps(sk, dst); 133 np->daddr_cache = daddr; 134 #ifdef CONFIG_IPV6_SUBTREES 135 np->saddr_cache = saddr; 136 #endif 137 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0; 138 } 139 140 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst, 141 struct in6_addr *daddr, struct in6_addr *saddr) 142 { 143 write_lock(&sk->sk_dst_lock); 144 __ip6_dst_store(sk, dst, daddr, saddr); 145 write_unlock(&sk->sk_dst_lock); 146 } 147 148 static inline int ipv6_unicast_destination(struct sk_buff *skb) 149 { 150 struct rt6_info *rt = (struct rt6_info *) skb->dst; 151 152 return rt->rt6i_flags & RTF_LOCAL; 153 } 154 155 #endif 156 #endif 157