[PATCH] IPv6 dnat/snat support

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Two patches are attached. They add port based DNAT/SNAT feature for
changing the dest or src MAC address in MAC header of IPv6 packets.

(I couldn't get access to the ebtables cvs web interface, seems the
interface is down, so the patches were generated based on the original
ebtables-v2.0.8-2 and 2.6.18 netfilter.)

Example dnat Usage:=20

1. Port based:
ebtables -t nat -A PREROUTING --in-interface eth0 --protocol IPV6
--ip6-protocol "6" --ip6-destination-port 22 -j dnat --to-destination
00:13:20:F5:F1:28 --log-ip6

2. IP protocol-based:
ebtables -t nat -A PREROUTING --in-interface eth0 --protocol IPV6
--ip6-protocol 58 -j dnat --to-destination 00:13:20:F5:F1:28

3. IPv6:
ebtables -t nat -A PREROUTING --in-interface eth0 --protocol IPV6 -j
dnat --to-destination 00:13:20:F5:F1:28

Similar usage can be applied for snat.=20

Thanks
Kuo

>-----Original Message-----
>From: Bart De Schuymer [mailto:[email protected]]
>Sent: Friday, January 25, 2008 3:23 PM
>To: Tseng, Kuo-Lang
>Cc: [email protected]
>Subject: Re: [Ebtables-devel] IPv6 support in ebtables
>
>Op vr, 25-01-2008 te 14:27 -0800, schreef Tseng, Kuo-Lang:
>> >From: ebtables-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
>> [mailto:ebtables-devel-
>> >[email protected]] On Behalf Of Tseng, Kuo-Lang
>> >Sent: Wednesday, January 23, 2008 4:11 PM
>> >Hi,
>> >
>> >I would like to find out if there is any IPv6 support in ebtables
for
>> >replacing MAC address of the Ethernet header based on TCP or UDP
port
>> id
>> >in IPv6 packets. I would appreciate it if there is anyone on this
list
>> >who knows of any prior work in ebtables to support IPv6.
>> >
>> >One such example usage I am looking for is: TCP Port based DNAT
>> >
>> >Current IPv4 Support:
>> >-p IPv4 -i peth0 --ip-proto 6 --ip-dport 22 -j dnat --to-dst
>> >0:13:20:f5:f1:1f --dnat-target ACCEPT
>> >
>> >Similar support for IPv6 packets I would like to use:
>> >-p IPv6 -i peth0 --ip-proto 6 --ip-dport 22 -j dnat --to-dst
>> >0:13:20:f5:f1:1f --dnat-target ACCEPT
>> >
>>
>> I looked at version v2.0.8-2 of ebtables user space code and bridge
>> netfilter kernel code from 2.6 and realized that v6 support is not
>> there.
>>
>> Does anyone know if anyone is working (or planning) on adding this
>> support?
>>
>> If not, I'd like to add this minimum support into ebtables for dnat
on
>> IPv6 packets and is it fine for me to send a patch for review?
>
>That's fine. I'm not sure what you mean, but dnat on the IPv6 addresses
>of course doesn't belong in ebtables.
>
>cheers,
>Bart
>


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Content-Transfer-Encoding: base64
Content-Description: netfilter-ipv6.patch
Content-Disposition: attachment;
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