| 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 | * 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 | */ |
| 48 | static 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 | |
| 54 | static inline unsigned int rt6_flags2srcprefs(int flags) |
| 55 | { |
| 56 | return (flags >> 3) & 7; |
| 57 | } |
| 58 | |
| 59 | extern void ip6_route_input(struct sk_buff *skb); |
| 60 | |
| 61 | extern struct dst_entry * ip6_route_output(struct net *net, |
| 62 | struct sock *sk, |
| 63 | struct flowi *fl); |
| 64 | |
| 65 | extern int ip6_route_init(void); |
| 66 | extern void ip6_route_cleanup(void); |
| 67 | |
| 68 | extern int ipv6_route_ioctl(struct net *net, |
| 69 | unsigned int cmd, |
| 70 | void __user *arg); |
| 71 | |
| 72 | extern int ip6_route_add(struct fib6_config *cfg); |
| 73 | extern int ip6_ins_rt(struct rt6_info *); |
| 74 | extern int ip6_del_rt(struct rt6_info *); |
| 75 | |
| 76 | extern 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 | |
| 81 | extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev, |
| 82 | struct neighbour *neigh, |
| 83 | const struct in6_addr *addr); |
| 84 | extern int icmp6_dst_gc(void); |
| 85 | |
| 86 | extern void fib6_force_start_gc(struct net *net); |
| 87 | |
| 88 | extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, |
| 89 | const struct in6_addr *addr, |
| 90 | int anycast); |
| 91 | |
| 92 | extern int ip6_dst_hoplimit(struct dst_entry *dst); |
| 93 | |
| 94 | /* |
| 95 | * support functions for ND |
| 96 | * |
| 97 | */ |
| 98 | extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr, |
| 99 | struct net_device *dev); |
| 100 | extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr, |
| 101 | struct net_device *dev, |
| 102 | unsigned int pref); |
| 103 | |
| 104 | extern void rt6_purge_dflt_routers(struct net *net); |
| 105 | |
| 106 | extern int rt6_route_rcv(struct net_device *dev, |
| 107 | u8 *opt, int len, |
| 108 | struct in6_addr *gwaddr); |
| 109 | |
| 110 | extern 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 | |
| 117 | extern void rt6_pmtu_discovery(struct in6_addr *daddr, |
| 118 | struct in6_addr *saddr, |
| 119 | struct net_device *dev, |
| 120 | u32 pmtu); |
| 121 | |
| 122 | struct netlink_callback; |
| 123 | |
| 124 | struct rt6_rtnl_dump_arg { |
| 125 | struct sk_buff *skb; |
| 126 | struct netlink_callback *cb; |
| 127 | struct net *net; |
| 128 | }; |
| 129 | |
| 130 | extern int rt6_dump_route(struct rt6_info *rt, void *p_arg); |
| 131 | extern void rt6_ifdown(struct net *net, struct net_device *dev); |
| 132 | extern void rt6_mtu_change(struct net_device *dev, unsigned mtu); |
| 133 | |
| 134 | |
| 135 | /* |
| 136 | * Store a destination cache entry in a socket |
| 137 | */ |
| 138 | static 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 | |
| 152 | static 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 | |
| 160 | static 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 | int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *)); |
| 168 | |
| 169 | static inline int ip6_skb_dst_mtu(struct sk_buff *skb) |
| 170 | { |
| 171 | struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL; |
| 172 | |
| 173 | return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ? |
| 174 | skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb)); |
| 175 | } |
| 176 | |
| 177 | #endif |
| 178 | #endif |