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Date:      Fri, 21 Apr 2006 13:48:22 +0800
From:      "ShouYan Mao" <symao@juniper.net>
To:        "Amit Mondal" <amit.freebsd@gmail.com>, <freebsd-net@freebsd.org>
Subject:   RE: freeBSD /ipfw/ divert socket
Message-ID:  <322CBDC9307AE449B2BBDA9BF40792EF02DD8B@emailcnrd1.jnpr.net>

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No, if no application is reading from divert socket, kernel will drop =
it!
A divert socket is like a hole in the net system.

Best Regards
Shouyan

-----Original Message-----
From: owner-freebsd-net@freebsd.org =
[mailto:owner-freebsd-net@freebsd.org] On Behalf Of Amit Mondal
Sent: 2006=C4=EA4=D4=C221=C8=D5 13:44
To: freebsd-net@freebsd.org
Subject: freeBSD /ipfw/ divert socket

Hi All,

I need a little help with FreeBSD Kernel stuff. I wanna use Divert =
Socket to
sniff IP packet in FreeBSD.
For that I have compiled the kernel with options IPDIVERT and everything =
is
ok.

Now, when I am not really sniffing and re-injecting the packet back to =
the
network stack, it is basically dropping all the packets. But I want it
pass-through it, when no application is reading at divert socket. My
question is, HOW CAN I MAKE IT PASS-THROUGH? IF NO APPLICATION IS =
READING
FROM DIVERT SOCKET, IT SHOULD WORK AS IF THERE IS NO DIVERT SOCKET.

Thanks in adavnce

Rgds
Amit




On 4/6/06, Amit Mondal <amit.freebsd@gmail.com> wrote:
>
> Hi All,
> I am a newbie to freeBSD. I am trying to modify freeBSD tcp for some
> security ehancement. Could anyone pls point me to how/where to start =
or any
> suitable material/tutorial to start with.
>
> Thanks in advance
> Amit
>
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