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234 lines
6.5 KiB
234 lines
6.5 KiB
#ifndef _NET_IP6_ROUTE_H |
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#define _NET_IP6_ROUTE_H |
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struct route_info { |
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__u8 type; |
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__u8 length; |
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__u8 prefix_len; |
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#if defined(__BIG_ENDIAN_BITFIELD) |
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__u8 reserved_h:3, |
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route_pref:2, |
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reserved_l:3; |
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#elif defined(__LITTLE_ENDIAN_BITFIELD) |
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__u8 reserved_l:3, |
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route_pref:2, |
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reserved_h:3; |
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#endif |
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__be32 lifetime; |
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__u8 prefix[0]; /* 0,8 or 16 */ |
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}; |
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#include <net/addrconf.h> |
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#include <net/flow.h> |
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#include <net/ip6_fib.h> |
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#include <net/sock.h> |
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#include <linux/ip.h> |
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#include <linux/ipv6.h> |
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#include <linux/route.h> |
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#define RT6_LOOKUP_F_IFACE 0x00000001 |
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#define RT6_LOOKUP_F_REACHABLE 0x00000002 |
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#define RT6_LOOKUP_F_HAS_SADDR 0x00000004 |
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#define RT6_LOOKUP_F_SRCPREF_TMP 0x00000008 |
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#define RT6_LOOKUP_F_SRCPREF_PUBLIC 0x00000010 |
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#define RT6_LOOKUP_F_SRCPREF_COA 0x00000020 |
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#define RT6_LOOKUP_F_IGNORE_LINKSTATE 0x00000040 |
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/* We do not (yet ?) support IPv6 jumbograms (RFC 2675) |
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* Unlike IPv4, hdr->seg_len doesn't include the IPv6 header |
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*/ |
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#define IP6_MAX_MTU (0xFFFF + sizeof(struct ipv6hdr)) |
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/* |
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* rt6_srcprefs2flags() and rt6_flags2srcprefs() translate |
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* between IPV6_ADDR_PREFERENCES socket option values |
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* IPV6_PREFER_SRC_TMP = 0x1 |
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* IPV6_PREFER_SRC_PUBLIC = 0x2 |
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* IPV6_PREFER_SRC_COA = 0x4 |
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* and above RT6_LOOKUP_F_SRCPREF_xxx flags. |
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*/ |
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static inline int rt6_srcprefs2flags(unsigned int srcprefs) |
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{ |
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/* No need to bitmask because srcprefs have only 3 bits. */ |
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return srcprefs << 3; |
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} |
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static inline unsigned int rt6_flags2srcprefs(int flags) |
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{ |
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return (flags >> 3) & 7; |
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} |
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static inline bool rt6_need_strict(const struct in6_addr *daddr) |
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{ |
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return ipv6_addr_type(daddr) & |
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(IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK); |
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} |
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void ip6_route_input(struct sk_buff *skb); |
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struct dst_entry *ip6_route_input_lookup(struct net *net, |
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struct net_device *dev, |
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struct flowi6 *fl6, int flags); |
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struct dst_entry *ip6_route_output_flags(struct net *net, const struct sock *sk, |
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struct flowi6 *fl6, int flags); |
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static inline struct dst_entry *ip6_route_output(struct net *net, |
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const struct sock *sk, |
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struct flowi6 *fl6) |
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{ |
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return ip6_route_output_flags(net, sk, fl6, 0); |
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} |
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struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6, |
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int flags); |
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struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table, |
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int ifindex, struct flowi6 *fl6, int flags); |
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int ip6_route_init(void); |
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void ip6_route_cleanup(void); |
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int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg); |
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int ip6_route_add(struct fib6_config *cfg); |
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int ip6_ins_rt(struct rt6_info *); |
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int ip6_del_rt(struct rt6_info *); |
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static inline int ip6_route_get_saddr(struct net *net, struct rt6_info *rt, |
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const struct in6_addr *daddr, |
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unsigned int prefs, |
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struct in6_addr *saddr) |
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{ |
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struct inet6_dev *idev = |
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rt ? ip6_dst_idev((struct dst_entry *)rt) : NULL; |
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int err = 0; |
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if (rt && rt->rt6i_prefsrc.plen) |
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*saddr = rt->rt6i_prefsrc.addr; |
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else |
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err = ipv6_dev_get_saddr(net, idev ? idev->dev : NULL, |
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daddr, prefs, saddr); |
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return err; |
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} |
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struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr, |
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const struct in6_addr *saddr, int oif, int flags); |
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struct dst_entry *icmp6_dst_alloc(struct net_device *dev, struct flowi6 *fl6); |
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int icmp6_dst_gc(void); |
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void fib6_force_start_gc(struct net *net); |
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struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, |
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const struct in6_addr *addr, bool anycast); |
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struct rt6_info *ip6_dst_alloc(struct net *net, struct net_device *dev, |
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int flags); |
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/* |
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* support functions for ND |
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* |
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*/ |
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struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr, |
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struct net_device *dev); |
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struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr, |
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struct net_device *dev, unsigned int pref); |
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void rt6_purge_dflt_routers(struct net *net); |
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int rt6_route_rcv(struct net_device *dev, u8 *opt, int len, |
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const struct in6_addr *gwaddr); |
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void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu, int oif, |
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u32 mark); |
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void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu); |
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void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark); |
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void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif, |
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u32 mark); |
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void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk); |
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struct netlink_callback; |
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struct rt6_rtnl_dump_arg { |
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struct sk_buff *skb; |
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struct netlink_callback *cb; |
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struct net *net; |
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}; |
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int rt6_dump_route(struct rt6_info *rt, void *p_arg); |
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void rt6_ifdown(struct net *net, struct net_device *dev); |
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void rt6_mtu_change(struct net_device *dev, unsigned int mtu); |
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void rt6_remove_prefsrc(struct inet6_ifaddr *ifp); |
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void rt6_clean_tohost(struct net *net, struct in6_addr *gateway); |
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/* |
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* Store a destination cache entry in a socket |
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*/ |
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static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst, |
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const struct in6_addr *daddr, |
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const struct in6_addr *saddr) |
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{ |
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struct ipv6_pinfo *np = inet6_sk(sk); |
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np->dst_cookie = rt6_get_cookie((struct rt6_info *)dst); |
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sk_setup_caps(sk, dst); |
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np->daddr_cache = daddr; |
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#ifdef CONFIG_IPV6_SUBTREES |
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np->saddr_cache = saddr; |
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#endif |
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} |
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static inline bool ipv6_unicast_destination(const struct sk_buff *skb) |
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{ |
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struct rt6_info *rt = (struct rt6_info *) skb_dst(skb); |
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return rt->rt6i_flags & RTF_LOCAL; |
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} |
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static inline bool ipv6_anycast_destination(const struct dst_entry *dst, |
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const struct in6_addr *daddr) |
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{ |
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struct rt6_info *rt = (struct rt6_info *)dst; |
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return rt->rt6i_flags & RTF_ANYCAST || |
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(rt->rt6i_dst.plen != 128 && |
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ipv6_addr_equal(&rt->rt6i_dst.addr, daddr)); |
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} |
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int ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb, |
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int (*output)(struct net *, struct sock *, struct sk_buff *)); |
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static inline int ip6_skb_dst_mtu(struct sk_buff *skb) |
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{ |
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struct ipv6_pinfo *np = skb->sk && !dev_recursion_level() ? |
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inet6_sk(skb->sk) : NULL; |
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return (np && np->pmtudisc >= IPV6_PMTUDISC_PROBE) ? |
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skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb)); |
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} |
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static inline bool ip6_sk_accept_pmtu(const struct sock *sk) |
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{ |
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return inet6_sk(sk)->pmtudisc != IPV6_PMTUDISC_INTERFACE && |
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inet6_sk(sk)->pmtudisc != IPV6_PMTUDISC_OMIT; |
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} |
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static inline bool ip6_sk_ignore_df(const struct sock *sk) |
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{ |
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return inet6_sk(sk)->pmtudisc < IPV6_PMTUDISC_DO || |
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inet6_sk(sk)->pmtudisc == IPV6_PMTUDISC_OMIT; |
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} |
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static inline struct in6_addr *rt6_nexthop(struct rt6_info *rt, |
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struct in6_addr *daddr) |
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{ |
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if (rt->rt6i_flags & RTF_GATEWAY) |
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return &rt->rt6i_gateway; |
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else if (unlikely(rt->rt6i_flags & RTF_CACHE)) |
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return &rt->rt6i_dst.addr; |
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else |
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return daddr; |
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} |
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#endif
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