diff options
Diffstat (limited to 'include/net/ip6_route.h')
| -rw-r--r-- | include/net/ip6_route.h | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h new file mode 100644 index 000000000..5e192068e --- /dev/null +++ b/include/net/ip6_route.h @@ -0,0 +1,202 @@ +#ifndef _NET_IP6_ROUTE_H +#define _NET_IP6_ROUTE_H + +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> +#include <linux/route.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 + +/* We do not (yet ?) support IPv6 jumbograms (RFC 2675) + * Unlike IPv4, hdr->seg_len doesn't include the IPv6 header + */ +#define IP6_MAX_MTU (0xFFFF + sizeof(struct ipv6hdr)) + +/* + * 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; +} + +static inline bool rt6_need_strict(const struct in6_addr *daddr) +{ + return ipv6_addr_type(daddr) & + (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK); +} + +void ip6_route_input(struct sk_buff *skb); + +struct dst_entry *ip6_route_output(struct net *net, const struct sock *sk, + struct flowi6 *fl6); +struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6, + int flags); + +int ip6_route_init(void); +void ip6_route_cleanup(void); + +int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg); + +int ip6_route_add(struct fib6_config *cfg); +int ip6_ins_rt(struct rt6_info *); +int ip6_del_rt(struct rt6_info *); + +int ip6_route_get_saddr(struct net *net, struct rt6_info *rt, + const struct in6_addr *daddr, unsigned int prefs, + struct in6_addr *saddr); + +struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr, + const struct in6_addr *saddr, int oif, int flags); + +struct dst_entry *icmp6_dst_alloc(struct net_device *dev, struct flowi6 *fl6); +int icmp6_dst_gc(void); + +void fib6_force_start_gc(struct net *net); + +struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, + const struct in6_addr *addr, bool anycast); + +/* + * support functions for ND + * + */ +struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr, + struct net_device *dev); +struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr, + struct net_device *dev, unsigned int pref); + +void rt6_purge_dflt_routers(struct net *net); + +int rt6_route_rcv(struct net_device *dev, u8 *opt, int len, + const struct in6_addr *gwaddr); + +void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu, int oif, + u32 mark); +void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu); +void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark); +void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif, + u32 mark); +void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk); + +struct netlink_callback; + +struct rt6_rtnl_dump_arg { + struct sk_buff *skb; + struct netlink_callback *cb; + struct net *net; +}; + +int rt6_dump_route(struct rt6_info *rt, void *p_arg); +void rt6_ifdown(struct net *net, struct net_device *dev); +void rt6_mtu_change(struct net_device *dev, unsigned int mtu); +void rt6_remove_prefsrc(struct inet6_ifaddr *ifp); +void rt6_clean_tohost(struct net *net, struct in6_addr *gateway); + + +/* + * Store a destination cache entry in a socket + */ +static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst, + const struct in6_addr *daddr, + const 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 bool ipv6_unicast_destination(const struct sk_buff *skb) +{ + struct rt6_info *rt = (struct rt6_info *) skb_dst(skb); + + return rt->rt6i_flags & RTF_LOCAL; +} + +static inline bool ipv6_anycast_destination(const struct sk_buff *skb) +{ + struct rt6_info *rt = (struct rt6_info *) skb_dst(skb); + + return rt->rt6i_flags & RTF_ANYCAST; +} + +int ip6_fragment(struct sock *sk, struct sk_buff *skb, + int (*output)(struct sock *, struct sk_buff *)); + +static inline int ip6_skb_dst_mtu(struct sk_buff *skb) +{ + struct ipv6_pinfo *np = skb->sk && !dev_recursion_level() ? + inet6_sk(skb->sk) : NULL; + + return (np && np->pmtudisc >= IPV6_PMTUDISC_PROBE) ? + skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb)); +} + +static inline bool ip6_sk_accept_pmtu(const struct sock *sk) +{ + return inet6_sk(sk)->pmtudisc != IPV6_PMTUDISC_INTERFACE && + inet6_sk(sk)->pmtudisc != IPV6_PMTUDISC_OMIT; +} + +static inline bool ip6_sk_ignore_df(const struct sock *sk) +{ + return inet6_sk(sk)->pmtudisc < IPV6_PMTUDISC_DO || + inet6_sk(sk)->pmtudisc == IPV6_PMTUDISC_OMIT; +} + +static inline struct in6_addr *rt6_nexthop(struct rt6_info *rt) +{ + return &rt->rt6i_gateway; +} + +#endif |