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由 David Ahern 提交于
The router discovery code has a FIB entry and wants to validate the gateway has a neighbor entry. Refactor the existing dst_neigh_lookup for IPv6 and create a new function that takes the gateway and device and returns a neighbor entry. Use the new function in ndisc_router_discovery to validate the gateway. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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