Re: [PATCH 2/3] netfilter: xtables: add PKTTYPE target

[Patrick McHardy <kaber@trash.net>]

Pablo Neira Ayuso wrote:
> This patch adds the PKTTYPE target which can be used to mangle the
> skbuff packet type field. This target is useful in conjunction with
> the arptables mcmangle target to TCP working again when a
> multicast hardware address is used. An example of its use:
> 
> iptables -I PREROUTING ! -s 224.0.0.0/4 -t mangle \
> 	-j PKTTYPE --to-pkt-type unicast
> 
> Given the following arptables rule-set:
> 
> arptables -I OUTPUT -o eth0 -j mcmangle --h-length 6
> 	\ --mc-mangle-mac 01:00:5e:00:01:01 --mc-mangle-dev eth0
> arptables -I INPUT --h-length 6 --destination-mac 01:00:5e:00:01:01
> 	\ -j mangle --mangle-mac-d 00:zz:yy:xx:5a:27
> 
> See arptables mcmangle target for further information.

That one refers to this patch :) So you're actually communicating
using TCP and multicast? Why don't you use UDP, which works fine
using multicast without pkttype mangling?