On 12.06.2012 16:02, Michael Tuexen wrote:
Author: tuexen
Date: Tue Jun 12 14:02:38 2012
New Revision: 236959
URL: http://svn.freebsd.org/changeset/base/236959
Log:
Add a IP_RECVTOS socket option to receive for received UDP/IPv4
packets a cmsg of type IP_RECVTOS which contains the TOS byte.
Much like IP_RECVTTL does for TTL. This allows to implement a
protocol on top of UDP and implementing ECN.
You may want to consider to alias IP_RECVTOS with IP_TOS as it is
done with IP_SENDSRCADDR+IP_RECVDSTADDR to allow for simpler replying
of received UDP packets. That way IP_RECVTOS has the same ip socket
option number and it can be used for direct TOS reflection.
--
Andre
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