ipv6: Introduce rt6_nexthop() to select nexthop address.
For RTF_GATEWAY route, return rt->rt6i_gateway. Otherwise, return 2nd argument (destination address). This will be used by following patches which remove rt->n dependency patches in ip6_dst_lookup_tail() and ip6_finish_output2(). Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -23,6 +23,7 @@ struct route_info {
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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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@ -194,4 +195,11 @@ static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
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skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));
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}
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static inline struct in6_addr *rt6_nexthop(struct rt6_info *rt, struct in6_addr *dest)
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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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return dest;
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}
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#endif
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