diff options
Diffstat (limited to 'include/net/ip6_route.h')
| -rw-r--r-- | include/net/ip6_route.h | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h new file mode 100644 index 00000000..5e91b72f --- /dev/null +++ b/include/net/ip6_route.h @@ -0,0 +1,193 @@ +#ifndef _NET_IP6_ROUTE_H +#define _NET_IP6_ROUTE_H + +#define IP6_RT_PRIO_USER 1024 +#define IP6_RT_PRIO_ADDRCONF 256 + +struct route_info { + __u8 type; + __u8 length; + __u8 prefix_len; +#if defined(__BIG_ENDIAN_BITFIELD) + __u8 reserved_h:3, + route_pref:2, + reserved_l:3; +#elif defined(__LITTLE_ENDIAN_BITFIELD) + __u8 reserved_l:3, + route_pref:2, + reserved_h:3; +#endif + __be32 lifetime; + __u8 prefix[0]; /* 0,8 or 16 */ +}; + +#include <net/flow.h> +#include <net/ip6_fib.h> +#include <net/sock.h> +#include <linux/ip.h> +#include <linux/ipv6.h> + +#define RT6_LOOKUP_F_IFACE 0x00000001 +#define RT6_LOOKUP_F_REACHABLE 0x00000002 +#define RT6_LOOKUP_F_HAS_SADDR 0x00000004 +#define RT6_LOOKUP_F_SRCPREF_TMP 0x00000008 +#define RT6_LOOKUP_F_SRCPREF_PUBLIC 0x00000010 +#define RT6_LOOKUP_F_SRCPREF_COA 0x00000020 + +/* + * rt6_srcprefs2flags() and rt6_flags2srcprefs() translate + * between IPV6_ADDR_PREFERENCES socket option values + * IPV6_PREFER_SRC_TMP = 0x1 + * IPV6_PREFER_SRC_PUBLIC = 0x2 + * IPV6_PREFER_SRC_COA = 0x4 + * and above RT6_LOOKUP_F_SRCPREF_xxx flags. + */ +static inline int rt6_srcprefs2flags(unsigned int srcprefs) +{ + /* No need to bitmask because srcprefs have only 3 bits. */ + return srcprefs << 3; +} + +static inline unsigned int rt6_flags2srcprefs(int flags) +{ + return (flags >> 3) & 7; +} + +extern void rt6_bind_peer(struct rt6_info *rt, + int create); + +static inline struct inet_peer *rt6_get_peer(struct rt6_info *rt) +{ + if (rt->rt6i_peer) + return rt->rt6i_peer; + + rt6_bind_peer(rt, 0); + return rt->rt6i_peer; +} + +extern void ip6_route_input(struct sk_buff *skb); + +extern struct dst_entry * ip6_route_output(struct net *net, + const struct sock *sk, + struct flowi6 *fl6); + +extern int ip6_route_init(void); +extern void ip6_route_cleanup(void); + +extern int ipv6_route_ioctl(struct net *net, + unsigned int cmd, + void __user *arg); + +extern int ip6_route_add(struct fib6_config *cfg); +extern int ip6_ins_rt(struct rt6_info *); +extern int ip6_del_rt(struct rt6_info *); + +extern int ip6_route_get_saddr(struct net *net, + struct rt6_info *rt, + const struct in6_addr *daddr, + unsigned int prefs, + struct in6_addr *saddr); + +extern struct rt6_info *rt6_lookup(struct net *net, + const struct in6_addr *daddr, + const struct in6_addr *saddr, + int oif, int flags); + +extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev, + struct neighbour *neigh, + const struct in6_addr *addr); +extern int icmp6_dst_gc(void); + +extern void fib6_force_start_gc(struct net *net); + +extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, + const struct in6_addr *addr, + int anycast); + +extern int ip6_dst_hoplimit(struct dst_entry *dst); + +/* + * support functions for ND + * + */ +extern struct rt6_info * rt6_get_dflt_router(const struct in6_addr *addr, + struct net_device *dev); +extern struct rt6_info * rt6_add_dflt_router(const struct in6_addr *gwaddr, + struct net_device *dev, + unsigned int pref); + +extern void rt6_purge_dflt_routers(struct net *net); + +extern int rt6_route_rcv(struct net_device *dev, + u8 *opt, int len, + const struct in6_addr *gwaddr); + +extern void rt6_redirect(const struct in6_addr *dest, + const struct in6_addr *src, + const struct in6_addr *saddr, + struct neighbour *neigh, + u8 *lladdr, + int on_link); + +extern void rt6_pmtu_discovery(const struct in6_addr *daddr, + const struct in6_addr *saddr, + struct net_device *dev, + u32 pmtu); + +struct netlink_callback; + +struct rt6_rtnl_dump_arg { + struct sk_buff *skb; + struct netlink_callback *cb; + struct net *net; +}; + +extern int rt6_dump_route(struct rt6_info *rt, void *p_arg); +extern void rt6_ifdown(struct net *net, struct net_device *dev); +extern void rt6_mtu_change(struct net_device *dev, unsigned mtu); +extern void rt6_remove_prefsrc(struct inet6_ifaddr *ifp); + + +/* + * Store a destination cache entry in a socket + */ +static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst, + struct in6_addr *daddr, struct in6_addr *saddr) +{ + struct ipv6_pinfo *np = inet6_sk(sk); + struct rt6_info *rt = (struct rt6_info *) dst; + + sk_setup_caps(sk, dst); + np->daddr_cache = daddr; +#ifdef CONFIG_IPV6_SUBTREES + np->saddr_cache = saddr; +#endif + np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0; +} + +static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst, + struct in6_addr *daddr, struct in6_addr *saddr) +{ + spin_lock(&sk->sk_dst_lock); + __ip6_dst_store(sk, dst, daddr, saddr); + spin_unlock(&sk->sk_dst_lock); +} + +static inline int ipv6_unicast_destination(struct sk_buff *skb) +{ + struct rt6_info *rt = (struct rt6_info *) skb_dst(skb); + + return rt->rt6i_flags & RTF_LOCAL; +} + +int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *)); + +static inline int ip6_skb_dst_mtu(struct sk_buff *skb) +{ + struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL; + + return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ? + skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb)); +} + +#endif |