forked from Minki/linux
ad0081e43a
This patch modifies IPsec6 to fragment IPv6 packets that are locally generated as needed. This version of the patch only fragments in tunnel mode, so that fragment headers will not be obscured by ESP in transport mode. Signed-off-by: David L Stevens <dlstevens@us.ibm.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
179 lines
4.6 KiB
C
179 lines
4.6 KiB
C
#ifndef _NET_IP6_ROUTE_H
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#define _NET_IP6_ROUTE_H
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#define IP6_RT_PRIO_USER 1024
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#define IP6_RT_PRIO_ADDRCONF 256
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#define IP6_RT_PRIO_KERN 512
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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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#ifdef __KERNEL__
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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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#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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/*
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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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extern void ip6_route_input(struct sk_buff *skb);
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extern struct dst_entry * ip6_route_output(struct net *net,
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struct sock *sk,
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struct flowi *fl);
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extern int ip6_route_init(void);
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extern void ip6_route_cleanup(void);
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extern int ipv6_route_ioctl(struct net *net,
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unsigned int cmd,
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void __user *arg);
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extern int ip6_route_add(struct fib6_config *cfg);
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extern int ip6_ins_rt(struct rt6_info *);
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extern int ip6_del_rt(struct rt6_info *);
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extern struct rt6_info *rt6_lookup(struct net *net,
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const struct in6_addr *daddr,
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const struct in6_addr *saddr,
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int oif, int flags);
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extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
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struct neighbour *neigh,
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const struct in6_addr *addr);
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extern int icmp6_dst_gc(void);
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extern void fib6_force_start_gc(struct net *net);
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extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
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const struct in6_addr *addr,
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int anycast);
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extern int ip6_dst_hoplimit(struct dst_entry *dst);
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/*
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* support functions for ND
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*
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*/
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extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr,
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struct net_device *dev);
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extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr,
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struct net_device *dev,
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unsigned int pref);
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extern void rt6_purge_dflt_routers(struct net *net);
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extern int rt6_route_rcv(struct net_device *dev,
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u8 *opt, int len,
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struct in6_addr *gwaddr);
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extern void rt6_redirect(struct in6_addr *dest,
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struct in6_addr *src,
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struct in6_addr *saddr,
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struct neighbour *neigh,
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u8 *lladdr,
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int on_link);
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extern void rt6_pmtu_discovery(struct in6_addr *daddr,
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struct in6_addr *saddr,
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struct net_device *dev,
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u32 pmtu);
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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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extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
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extern void rt6_ifdown(struct net *net, struct net_device *dev);
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extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
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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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struct in6_addr *daddr, struct in6_addr *saddr)
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{
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struct ipv6_pinfo *np = inet6_sk(sk);
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struct rt6_info *rt = (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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np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
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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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struct in6_addr *daddr, struct in6_addr *saddr)
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{
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spin_lock(&sk->sk_dst_lock);
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__ip6_dst_store(sk, dst, daddr, saddr);
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spin_unlock(&sk->sk_dst_lock);
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}
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static inline int ipv6_unicast_destination(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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int ip6_fragment(struct sk_buff *skb, int (*output)(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 ? 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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#endif
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#endif
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