1 #ifndef _NET_IP6_ROUTE_H 2 #define _NET_IP6_ROUTE_H 3 4 #define IP6_RT_PRIO_FW 16 5 #define IP6_RT_PRIO_USER 1024 6 #define IP6_RT_PRIO_ADDRCONF 256 7 #define IP6_RT_PRIO_KERN 512 8 #define IP6_RT_FLOW_MASK 0x00ff 9 10 struct route_info { 11 __u8 type; 12 __u8 length; 13 __u8 prefix_len; 14 #if defined(__BIG_ENDIAN_BITFIELD) 15 __u8 reserved_h:3, 16 route_pref:2, 17 reserved_l:3; 18 #elif defined(__LITTLE_ENDIAN_BITFIELD) 19 __u8 reserved_l:3, 20 route_pref:2, 21 reserved_h:3; 22 #endif 23 __be32 lifetime; 24 __u8 prefix[0]; /* 0,8 or 16 */ 25 }; 26 27 #ifdef __KERNEL__ 28 29 #include <net/flow.h> 30 #include <net/ip6_fib.h> 31 #include <net/sock.h> 32 #include <linux/ip.h> 33 #include <linux/ipv6.h> 34 35 #define RT6_LOOKUP_F_IFACE 0x1 36 #define RT6_LOOKUP_F_REACHABLE 0x2 37 #define RT6_LOOKUP_F_HAS_SADDR 0x4 38 39 extern struct rt6_info ip6_null_entry; 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 int ip6_rt_gc_interval; 47 48 extern void ip6_route_input(struct sk_buff *skb); 49 50 extern struct dst_entry * ip6_route_output(struct sock *sk, 51 struct flowi *fl); 52 53 extern void ip6_route_init(void); 54 extern void ip6_route_cleanup(void); 55 56 extern int ipv6_route_ioctl(unsigned int cmd, void __user *arg); 57 58 extern int ip6_route_add(struct fib6_config *cfg); 59 extern int ip6_ins_rt(struct rt6_info *); 60 extern int ip6_del_rt(struct rt6_info *); 61 62 extern int ip6_rt_addr_add(struct in6_addr *addr, 63 struct net_device *dev, 64 int anycast); 65 66 extern int ip6_rt_addr_del(struct in6_addr *addr, 67 struct net_device *dev); 68 69 extern void rt6_sndmsg(int type, struct in6_addr *dst, 70 struct in6_addr *src, 71 struct in6_addr *gw, 72 struct net_device *dev, 73 int dstlen, int srclen, 74 int metric, __u32 flags); 75 76 extern struct rt6_info *rt6_lookup(struct in6_addr *daddr, 77 struct in6_addr *saddr, 78 int oif, int flags); 79 80 extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev, 81 struct neighbour *neigh, 82 struct in6_addr *addr, 83 int (*output)(struct sk_buff *)); 84 extern int ndisc_dst_gc(int *more); 85 extern void fib6_force_start_gc(void); 86 87 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, 88 const struct in6_addr *addr, 89 int anycast); 90 91 /* 92 * support functions for ND 93 * 94 */ 95 extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr, 96 struct net_device *dev); 97 extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr, 98 struct net_device *dev, 99 unsigned int pref); 100 101 extern void rt6_purge_dflt_routers(void); 102 103 extern int rt6_route_rcv(struct net_device *dev, 104 u8 *opt, int len, 105 struct in6_addr *gwaddr); 106 107 extern void rt6_redirect(struct in6_addr *dest, 108 struct in6_addr *src, 109 struct in6_addr *saddr, 110 struct neighbour *neigh, 111 u8 *lladdr, 112 int on_link); 113 114 extern void rt6_pmtu_discovery(struct in6_addr *daddr, 115 struct in6_addr *saddr, 116 struct net_device *dev, 117 u32 pmtu); 118 119 struct netlink_callback; 120 121 struct rt6_rtnl_dump_arg 122 { 123 struct sk_buff *skb; 124 struct netlink_callback *cb; 125 }; 126 127 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg); 128 extern void rt6_ifdown(struct net_device *dev); 129 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu); 130 131 extern rwlock_t rt6_lock; 132 133 /* 134 * Store a destination cache entry in a socket 135 */ 136 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst, 137 struct in6_addr *daddr, struct in6_addr *saddr) 138 { 139 struct ipv6_pinfo *np = inet6_sk(sk); 140 struct rt6_info *rt = (struct rt6_info *) dst; 141 142 sk_setup_caps(sk, dst); 143 np->daddr_cache = daddr; 144 #ifdef CONFIG_IPV6_SUBTREES 145 np->saddr_cache = saddr; 146 #endif 147 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0; 148 } 149 150 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst, 151 struct in6_addr *daddr, struct in6_addr *saddr) 152 { 153 write_lock(&sk->sk_dst_lock); 154 __ip6_dst_store(sk, dst, daddr, saddr); 155 write_unlock(&sk->sk_dst_lock); 156 } 157 158 static inline int ipv6_unicast_destination(struct sk_buff *skb) 159 { 160 struct rt6_info *rt = (struct rt6_info *) skb->dst; 161 162 return rt->rt6i_flags & RTF_LOCAL; 163 } 164 165 #endif 166 #endif 167