[Click] Anyone have a simple stateless TCP responder?

[Nicholas Weaver]

On Thu, Jun 02, 2005 at 11:43:38AM +0200, Beyers Cronje composed:
> Hi Nicholas,
> 
> I've got a small element that provides valid ACKs on packets coming in through it's input 0. It ACKs every second packet || packets with PUSH bit set. Not exactly what you are looking for, but should be very easy to add SYN processing ie through input 1 and have a template pre-build HTTP response/redirect packet.
> 
> Let me know.

Thanks.  What would be the copyright on the element?

> Beyers
> 
> 
> -----Original Message-----
> From: click-bounces at amsterdam.lcs.mit.edu on behalf of Nicholas Weaver
> Sent: Thu 6/2/2005 12:45 AM
> To: click at amsterdam.lcs.mit.edu
> Subject: [Click] Anyone have a simple stateless TCP responder?
>  
> 
> Does anyone have a simple stateless TCP responder element?
> 
> Namely, it accepts a SYN.  It generates a corresponding SYN-ACK, a
> spew of data packets (without waiting for the ACK from the SYN-ACK),
> and the FIN?
> 
> I want an element which can give an HTTP redirect or error message
> when I'm blocking an IP, rather than just dropping on the floor, and
> I'd (ideally) want it to be stateless.  If it doesn't work 100% of teh
> time due to dropped packets, no big deal, the connections it is used
> on are for ones which are explicitly being dropped by a security
> module.
> 
> Thanks.
> 
> -- 
> Nicholas C. Weaver                               nweaver at icsi.berkeley.edu
>      This message has been ROT-13 encrypted twice for higher security.
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> 
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-- 
Nicholas C. Weaver                               nweaver at icsi.berkeley.edu
     This message has been ROT-13 encrypted twice for higher security.