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ipv6: Introduce rt6_nexthop() to select nexthop address.

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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>
This commit is contained in:
YOSHIFUJI Hideaki / 吉藤英明 2013-01-17 12:53:48 +00:00 committed by David S. Miller
parent 2152caea71
commit 9bb5a14813
1 changed files with 8 additions and 0 deletions
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8
include/net/ip6_route.h
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@ -23,6 +23,7 @@ struct route_info {
#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
@ -194,4 +195,11 @@ static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));
}
static inline struct in6_addr *rt6_nexthop(struct rt6_info *rt, struct in6_addr *dest)
{
if (rt->rt6i_flags & RTF_GATEWAY)
return &rt->rt6i_gateway;
return dest;
}
#endif