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Hi,
Two options you can consider is writing a netfilter module with code to map
the bits to daddr or write it in userspace and use IPQueue (if your traffic
is low)
I am not sure if you can achive this with existing modules.
On 8/31/05, kavitha <fd99127@xxxxxxxxx> wrote:
>
> Hi,
>
> We are trying to modify the TCP protocol a little but so that when a
> packet arrives at a router, it would be possible to read a particular field
> (lets say options or the reserved field) of the packet(that would give the
> actual path that the packet needs to take) and populate the destination ip
> address of that packet with the new ipadress read from this reserved field.
> I know that using dnat you can change the destination ipaddress of the
> packet but in my problem, I would not knwo the destination ipaddress prior
> (it would be dynamic) and it would change with every packet - so I would not
> be able to use a static ip address in the iptables rule. So I wanted to know
> if there is anyt way to get around this , or if iptables would not provide a
> solution to thsi problem at all . I knwo this can be done using raw sockets
> but adding a single line (as in iptables) seems to be a better proposition
> than writing pages of code. Basically, I want to know if there is a way to
> dynamically conf
> igure
> the destination ipaddress that a packet is being routed to by mapping
> certain other bits of the same packet coming in.
>
> It would really help if someoen can provide some information in this
> regard. Any pointers too would really be useful.I looked at the man pages
> and searched the internet but was not able to come across any rela examples
> where such a thing may have been used.
>
> Thanks for your time! Please let me know if you need more clarifications!
> Kavitha
>
>
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