From: Stephan von Krawczynski <skraw@ithnet.com>
To: linux-kernel@vger.kernel.org
Subject: How to find the correct source address to a destination in a kernel driver?
Date: Fri, 17 Oct 2014 10:08:01 +0200 [thread overview]
Message-ID: <20141017100801.f1c310de.skraw@ithnet.com> (raw)
Hello all,
in former kernels with routing cache things were easy. We just used :
rt = ip_route_output_key(XXX)
src = rt->rt_src;
Now if there is no routing cache, we tried this:
rt = ip_route_output_key(XXX)
src = inet_select_addr(rt->dst.dev, dst, RT_SCOPE_UNIVERSE);
Unfortunately this does not work with interfaces having multiple ip addresses
and the routing in question is not over the first configured ip.
How do I get the correct src for all possible cases?
--
Regards,
Stephan
reply other threads:[~2014-10-17 8:14 UTC|newest]
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