[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 #47 from Daniel Santos <daniel.santos at pobox.com>  2008-07-07 13:51:56 ---
Thanks for the response.  I guess I'm "it" then.  Let me make this really
really simple.  I ran wireshark and went through an area I knew had problems. 
In a one particular 0.499944 second time frame (I presume timing was aimed at
half a second) the lotro client sent 8530 identical UDP packets at 62 bytes
each (19 bytes of actual date, the rest headers).  That's a very short time for
half a MB of data.  But also keep in mind that routers and even the local
machine has to do processing for each packet (probably what kills some routers
with this bug).  Furthermore, I've located evidence
(http://forums.lotro.com/showthread.php?t=79612) that a variation of this bug
has existed for windows users in the past, propping up the supposition that
this is an inherent lotro client bug.

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.  It
may be possible to refine it further by looking for some opcode in the packet. 
I'm wondering if this can actually be done in netfilter, at least as a
temporary solution.  But I barely know where to start in wine.  My hope is that
there is a "hacks" library of some type somewhere to contain hacky work-arounds
for crappy applications like this one to keep them out of everything else.  I
guess I need to start surfing and trolling, err, I mean visiting the wine chat
room :)

If nothing else, I can make a patch for winsock.c that will be for use only for
people running lotro (an ugly idea IMO).


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