Re: replacing tcp fields

From: Karl Williams (karlg3@lycos.com)
Date: Fri Apr 27 2001 - 02:50:09 EST


Thanks for the idea. However, looking over the netfilter information, it seems that I can only specify certain TCP fields to mangle. I don't see where I can manipulate the checksum and/or data fields.
Am I missing something?
 
>You can obviously use Netfilter (netfilter.kernelnotes.org) with queueing
>rules in the OUTPUT chain.
>
>On Thu, 26 Apr 2001, Karl Williams wrote:
>
>> >> I need to replace the data field and the checksum field in a tcp packet with other information (not related to the socket or socket buffer).
>>
>> >Where is the packet originating from? Does it originate from a program on
>> >your computer, or some other machine addressed to your computer, or just
>> >forwarded through your computer?
>>
>> The packet itself is generated on my own machine. I assume it's using the TCP subroutines in the .../net/ipv4 directory.

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