[Bug 12302] Lord of the Rings: Shadows of Angmar unplayable due to high lag

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=12302





--- Comment #48 from Mikko Korkalo <mikko at korkalo.fi>  2008-07-07 20:44:10 ---
(In reply to comment #47)
> I propose a very simple hack that detects when the same packet is being sent
> within a 1 second time frame that will simply drop the additional packets.

This could work. I guess it would be easiest to write this as a netfilter match
module. For example:
iptables -A FORWARD -s 1.2.3.4 -p udp -m multiport --dports x,y,z -m length
--length 1:100 -m filterdupes -j DROP

Since the packets are so small, I guess checksumming them by CPU wouldn't be a
problem. Another method could be to always cache the last packet, and once a
new packet is queued, do a byte by byte comparision (probably faster than
checksumming?).

Sounds doable, assuming that the additional scanning won't cause too much CPU
load. I would start off by fetching and modifying source code for some simple
match module, such as "length".


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