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ipv6: Handle all fib6_nh in a nexthop in rt6_do_redirect 

Use nexthop_for_each_fib6_nh and fib6_nh_find_match to find the
fib6_nh in a nexthop that correlates to the device and gateway
in the rt6_info.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2019-06-08 14:53:30 -07:00 committed by David S. Miller
parent c55c89884d
commit 49d5b8ef20
1 changed files with 19 additions and 1 deletions
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18
net/ipv6/route.c
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@ -3899,7 +3899,25 @@ static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_bu
if (!res.f6i)
goto out;
if (res.f6i->nh) {
struct fib6_nh_match_arg arg = {
.dev = dst->dev,
.gw = &rt->rt6i_gateway,
};
nexthop_for_each_fib6_nh(res.f6i->nh,
fib6_nh_find_match, &arg);
/* fib6_info uses a nexthop that does not have fib6_nh
* using the dst->dev. Should be impossible
*/
if (!arg.match)
goto out;
res.nh = arg.match;
} else {
res.nh = res.f6i->fib6_nh;
}
res.fib6_flags = res.f6i->fib6_flags;
res.fib6_type = res.f6i->fib6_type;
nrt = ip6_rt_cache_alloc(&res, &msg->dest, NULL);