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From: Henrik Nordstrom <henrik@henriknordstrom.net>
To: Luis Campo Giralte <lcg223@tid.es>
Cc: netfilter-devel@lists.netfilter.org
Subject: Re: Change Packet Payload
Date: Fri, 09 Feb 2007 10:48:36 +0100	[thread overview]
Message-ID: <1171014516.19283.41.camel@henriknordstrom.net> (raw)
In-Reply-To: <1171013512.18531.5.camel@localhost>

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fre 2007-02-09 klockan 10:31 +0100 skrev Eric Leblond:
> Hi,
> 
> Le vendredi 09 février 2007 à 10:10 +0100, Luis Campo Giralte a écrit :
> > Hi every one!
> > im using libnetfilter_queue lib, its posible to change any value of the
> > packet, source address, icmp types, payload chars, or any data of the
> > packet received on the Handler (nfq_create_queue(h,0,&MyHandler,NULL))
> > and send it again with the correct checksum?
> 
> Yes, but you have to compute the checksum yourself.

And also make sure conntrack isn't loaded as it does not expect QUEUE to
rewrite things.. unless you QUEUE in the raw table PREROUTING before
conntrack is invoked..

Regards
Henrik

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  reply	other threads:[~2007-02-09  9:48 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-09  9:10 Change Packet Payload Luis Campo Giralte
2007-02-09  9:31 ` Eric Leblond
2007-02-09  9:48   ` Henrik Nordstrom [this message]
2007-02-13 22:10   ` Pablo Neira Ayuso
2007-02-14  9:39     ` Sebastien Tricaud
2007-02-14  9:47     ` Sebastien Tricaud
2007-02-14  9:52       ` Patrick McHardy
2007-02-14  9:55         ` Sebastien Tricaud
2007-02-14 10:05           ` Sebastien Tricaud
2007-02-14 10:09             ` Patrick McHardy
2007-02-15  0:36               ` Pablo Neira Ayuso
2007-02-15 14:45                 ` Sebastien Tricaud
2007-02-16 13:11                   ` Sebastien Tricaud

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