Date: Mon, 9 Dec 2013 09:36:55 +0200 From: Sami Halabi <sodynet1@gmail.com> To: Julian Elischer <julian@freebsd.org> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, Victor Gamov <vit@euro-comm.net> Subject: Re: Netgraph ng_patch and ng_input: where to find packets? Message-ID: <CAEW%2BogYbzXfN=JB7ozYC686iR6vbNMwehVJ7vcJUT60cfNUkJw@mail.gmail.com> In-Reply-To: <52A493F1.6040700@freebsd.org> References: <ED66CBAA-575E-4823-9AEE-4A44FEF6AB01@euro-comm.net> <5293E3E7.6090604@freebsd.org> <B2B699D8-0BD8-451F-8685-C7B8C56AA7F0@euro-comm.net> <F39CFDF7-0772-488D-9DB9-350AEC495884@euro-comm.net> <CAEW%2BogZNpqzxAYMArqa8jkb=O1OipKo9jYQ90iZq=0pxqPY=TQ@mail.gmail.com> <52A493F1.6040700@freebsd.org>
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Hi,
Actually following the ng_patch the following worked for me (using 9.2-R
-amd64):
kldload ng_patch
kldload ng_ipfw
/usr/sbin/ngctl -f- << SEQ
mkpeer ipfw: patch 300 in
name ipfw:300 src_dst_chg
msg src_dst_chg: setconfig { count=3D2 csum_flags=3D1 ops=
=3D[
\
{ mode=3D1 value=3D0xc0a8e609 length=3D4 offset=3D=
12 } \
{ mode=3D1 value=3D0xc0a8e680 length=3D4 offset=3D=
16 } ] }
SEQ
/sbin/ipfw add 600 netgraph 300 log ip from any to 239.0.0.19 dst-port 1234
in via vlan999
Sami
On Sun, Dec 8, 2013 at 5:44 PM, Julian Elischer <julian@freebsd.org> wrote:
> On 12/8/13, 6:43 PM, Sami Halabi wrote:
>
>> Hi Gamov,
>> Have got this to work?
>> If so would share configurations?
>>
>> Thanks in advance,
>> Sami
>> =D7=91=D7=AA=D7=90=D7=A8=D7=99=D7=9A 29 =D7=91=D7=A0=D7=95=D7=91 2013 19=
:28, "Victor Gamov" <vit@euro-comm.net> =D7=9B=D7=AA=D7=91:
>>
>>
>>
> if not then the way to track it it to put a breakpoint on the netgraph
> node that handles the packet and just single step through until you see
> where the packet goes..
> kdb would give you a decent idea but a second machine (or a virtual
> machine) with kgdb would really show you what's going on.
>
>
>
--=20
Sami Halabi
Information Systems Engineer
NMS Projects Expert
FreeBSD SysAdmin Expert
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