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Date: Fri, 19 Jun 2009 10:51:59 +0200 From: Tim Schneider <schneid5@...uni-bonn.de> To: netdev <netdev@...r.kernel.org> Subject: Hopcount in Pluggable Congestion Avoidance Module Hey, I am trying to implement a new congestion avoidance module which is optimized for multihop wireless networks. Since I'm new to kernel programming, it took me some time to find out about the pluggable congestion avoidance modules, which seem to be a really great and easy way to implement new algorithms. Unfortunately it is essential for me to have the hopcount of the TCP connection to implement the algorithm properly. As of now, I haven't found a way to get that Information out of the TCP-Socket. I also understand, that the TTL, which is, if I understand correctly, only available at the IP-Layer, does not provide reliable informations about the hopcount, since the TTL is set to 64 as standard, but can be changed by anyone at will. Are there any mechanisms to get the correct hopcount into my module? If not, is there a way to get the TTL of the ACK-Package, when it's received? Thank you for your help. Tim Schneider -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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