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 8struct 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 * rt6_srcprefs2flags() and rt6_flags2srcprefs() translate 42 * between IPV6_ADDR_PREFERENCES socket option values 43 * IPV6_PREFER_SRC_TMP = 0x1 44 * IPV6_PREFER_SRC_PUBLIC = 0x2 45 * IPV6_PREFER_SRC_COA = 0x4 46 * and above RT6_LOOKUP_F_SRCPREF_xxx flags. 47 */ 48static inline int rt6_srcprefs2flags(unsigned int srcprefs) 49{ 50 /* No need to bitmask because srcprefs have only 3 bits. */ 51 return srcprefs << 3; 52} 53 54static inline unsigned int rt6_flags2srcprefs(int flags) 55{ 56 return (flags >> 3) & 7; 57} 58 59extern void ip6_route_input(struct sk_buff *skb); 60 61extern struct dst_entry * ip6_route_output(struct net *net, 62 struct sock *sk, 63 struct flowi *fl); 64 65extern int ip6_route_init(void); 66extern void ip6_route_cleanup(void); 67 68extern int ipv6_route_ioctl(struct net *net, 69 unsigned int cmd, 70 void __user *arg); 71 72extern int ip6_route_add(struct fib6_config *cfg); 73extern int ip6_ins_rt(struct rt6_info *); 74extern int ip6_del_rt(struct rt6_info *); 75 76extern struct rt6_info *rt6_lookup(struct net *net, 77 const struct in6_addr *daddr, 78 const struct in6_addr *saddr, 79 int oif, int flags); 80 81extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev, 82 struct neighbour *neigh, 83 const struct in6_addr *addr); 84extern int icmp6_dst_gc(void); 85 86extern void fib6_force_start_gc(struct net *net); 87 88extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, 89 const struct in6_addr *addr, 90 int anycast); 91 92extern int ip6_dst_hoplimit(struct dst_entry *dst); 93 94/* 95 * support functions for ND 96 * 97 */ 98extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr, 99 struct net_device *dev); 100extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr, 101 struct net_device *dev, 102 unsigned int pref); 103 104extern void rt6_purge_dflt_routers(struct net *net); 105 106extern int rt6_route_rcv(struct net_device *dev, 107 u8 *opt, int len, 108 struct in6_addr *gwaddr); 109 110extern void rt6_redirect(struct in6_addr *dest, 111 struct in6_addr *src, 112 struct in6_addr *saddr, 113 struct neighbour *neigh, 114 u8 *lladdr, 115 int on_link); 116 117extern void rt6_pmtu_discovery(struct in6_addr *daddr, 118 struct in6_addr *saddr, 119 struct net_device *dev, 120 u32 pmtu); 121 122struct netlink_callback; 123 124struct rt6_rtnl_dump_arg { 125 struct sk_buff *skb; 126 struct netlink_callback *cb; 127 struct net *net; 128}; 129 130extern int rt6_dump_route(struct rt6_info *rt, void *p_arg); 131extern void rt6_ifdown(struct net *net, struct net_device *dev); 132extern void rt6_mtu_change(struct net_device *dev, unsigned mtu); 133 134 135/* 136 * Store a destination cache entry in a socket 137 */ 138static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst, 139 struct in6_addr *daddr, struct in6_addr *saddr) 140{ 141 struct ipv6_pinfo *np = inet6_sk(sk); 142 struct rt6_info *rt = (struct rt6_info *) dst; 143 144 sk_setup_caps(sk, dst); 145 np->daddr_cache = daddr; 146#ifdef CONFIG_IPV6_SUBTREES 147 np->saddr_cache = saddr; 148#endif 149 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0; 150} 151 152static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst, 153 struct in6_addr *daddr, struct in6_addr *saddr) 154{ 155 spin_lock(&sk->sk_dst_lock); 156 __ip6_dst_store(sk, dst, daddr, saddr); 157 spin_unlock(&sk->sk_dst_lock); 158} 159 160static inline int ipv6_unicast_destination(struct sk_buff *skb) 161{ 162 struct rt6_info *rt = (struct rt6_info *) skb_dst(skb); 163 164 return rt->rt6i_flags & RTF_LOCAL; 165} 166 167#endif 168#endif 169