Messages in this thread |  | | Date | Sun, 3 Sep 2000 19:42:53 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: zero-copy TCP |
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On Sun, 3 Sep 2000, Andi Kleen wrote:
> You can already cause incorrect checksums on the wire just by passing > a partly unmapped address (the zero-the-rest exception handler in > csum_copy_generic in i386 forgets to add in the carry) > > I do not believe it is a big deal, packets with bad checksum are not > really a problem (you can usually do other better DoS that do not need > it)
i think it's a quality of implementation issue. The csum_copy_generic thing is a bug. Allowing incorrect checksums to be sent out would be a design bug. I think some RFCs do even forbid the sending of incorrect packets?
Ingo
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