On Wed, 23 Sep 2015 07:17:53 -0500, Eric W. Biederman wrote: > Assuming the transport is UDP then it would be a UDP socket. That > socket will have all of the information needed to construct the outer > header as the receive path of that socket removes the outer header. > > I admit you can't use the cached dst. It is the wrong on that socket. > > My point is that if we have the UDP socket and we have the sk we have > all of the information we need to compute the reverse dst.
That (single) UDP socket may represent many tunnels with different parameters. Knowing the socket is still not enough to construct the data. The only place where the needed data is stored is routing table which won't help us much for ARP, and the metadata dst attached to the incoming skb. Jiri -- Jiri Benc -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
