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Date: Wed, 11 Jan 2006 17:55:06 -0800
From: Julian Elischer <julian@elischer.org>
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To: Dan Joumaa <nessup@gmail.com>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: Telling BSD to stop resetting the connection!
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Dan Joumaa wrote:

> Hello,
>
> I'm trying to code a software gateway with divert sockets. So far 
> basic things are working, but the net stack constantly resets the 
> connection whenever a SYN-ACK is sent to it.
>
> 103   9.443254  192.168.1.6 -> 205.166.76.40 TCP pacmand > https [SYN] 
> Seq=0 Ack=0 Win=2920 Len=0 MSS=536
> 104   9.443364  192.168.1.2 -> 205.166.76.40 TCP pacmand > https [SYN] 
> Seq=0 Ack=0 Win=2920 Len=0 MSS=536
> 105   9.443617  192.168.1.6 -> 205.166.76.40 TCP pacmand > https [SYN] 
> Seq=0 Ack=0 Win=2920 Len=0 MSS=536
> 106   9.443654  192.168.1.2 -> 205.166.76.40 TCP pacmand > https [SYN] 
> Seq=0 Ack=0 Win=2920 Len=0 MSS=536
> 107   9.496102 205.166.76.40 -> 192.168.1.2  TCP https > pacmand [SYN, 
> ACK] Seq=0 Ack=1 Win=1608 Len=0 MSS=1460
> 108   9.496185  192.168.1.2 -> 205.166.76.40 TCP pacmand > https [RST] 
> Seq=1 Ack=341266652 Win=0 Len=0
>
> (192.168.1.1 = next hop, 192.168.1.2 = this computer, 192.168.1.6 = 
> the client)


sounds like the SYN ACK is not getting diverted?

>
> Any ideas on how to stop the net stack from resetting my connections, 
> preferably programmatically?
>
> --ness
>
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