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 void ip6_route_input(struct sk_buff *skb); 47 48 extern struct dst_entry * ip6_route_output(struct sock *sk, 49 struct flowi *fl); 50 51 extern int ip6_route_init(void); 52 extern void ip6_route_cleanup(void); 53 54 extern int ipv6_route_ioctl(unsigned int cmd, void __user *arg); 55 56 extern int ip6_route_add(struct fib6_config *cfg); 57 extern int ip6_ins_rt(struct rt6_info *); 58 extern int ip6_del_rt(struct rt6_info *); 59 60 extern int ip6_rt_addr_add(struct in6_addr *addr, 61 struct net_device *dev, 62 int anycast); 63 64 extern int ip6_rt_addr_del(struct in6_addr *addr, 65 struct net_device *dev); 66 67 extern void rt6_sndmsg(int type, struct in6_addr *dst, 68 struct in6_addr *src, 69 struct in6_addr *gw, 70 struct net_device *dev, 71 int dstlen, int srclen, 72 int metric, __u32 flags); 73 74 extern struct rt6_info *rt6_lookup(struct in6_addr *daddr, 75 struct in6_addr *saddr, 76 int oif, int flags); 77 78 extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev, 79 struct neighbour *neigh, 80 struct in6_addr *addr, 81 int (*output)(struct sk_buff *)); 82 extern int ndisc_dst_gc(int *more); 83 extern void fib6_force_start_gc(void); 84 85 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, 86 const struct in6_addr *addr, 87 int anycast); 88 89 /* 90 * support functions for ND 91 * 92 */ 93 extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr, 94 struct net_device *dev); 95 extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr, 96 struct net_device *dev, 97 unsigned int pref); 98 99 extern void rt6_purge_dflt_routers(void); 100 101 extern int rt6_route_rcv(struct net_device *dev, 102 u8 *opt, int len, 103 struct in6_addr *gwaddr); 104 105 extern void rt6_redirect(struct in6_addr *dest, 106 struct in6_addr *src, 107 struct in6_addr *saddr, 108 struct neighbour *neigh, 109 u8 *lladdr, 110 int on_link); 111 112 extern void rt6_pmtu_discovery(struct in6_addr *daddr, 113 struct in6_addr *saddr, 114 struct net_device *dev, 115 u32 pmtu); 116 117 struct netlink_callback; 118 119 struct rt6_rtnl_dump_arg 120 { 121 struct sk_buff *skb; 122 struct netlink_callback *cb; 123 }; 124 125 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg); 126 extern void rt6_ifdown(struct net_device *dev); 127 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu); 128 129 extern rwlock_t rt6_lock; 130 131 /* 132 * Store a destination cache entry in a socket 133 */ 134 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst, 135 struct in6_addr *daddr, struct in6_addr *saddr) 136 { 137 struct ipv6_pinfo *np = inet6_sk(sk); 138 struct rt6_info *rt = (struct rt6_info *) dst; 139 140 sk_setup_caps(sk, dst); 141 np->daddr_cache = daddr; 142 #ifdef CONFIG_IPV6_SUBTREES 143 np->saddr_cache = saddr; 144 #endif 145 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0; 146 } 147 148 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst, 149 struct in6_addr *daddr, struct in6_addr *saddr) 150 { 151 write_lock(&sk->sk_dst_lock); 152 __ip6_dst_store(sk, dst, daddr, saddr); 153 write_unlock(&sk->sk_dst_lock); 154 } 155 156 static inline int ipv6_unicast_destination(struct sk_buff *skb) 157 { 158 struct rt6_info *rt = (struct rt6_info *) skb->dst; 159 160 return rt->rt6i_flags & RTF_LOCAL; 161 } 162 163 #endif 164 #endif 165