[Xorp-hackers] [Xorp-users] Xorp Router with ISP (RP discovery?) - ISP not supporting PIM

[saurabh]

On 05/03/2010 08:27 PM, saurabh wrote:
>   
>> I've certainly thought of doing it, but no one's come forward to fund 
>> the feature, nor has it been part of any official road-map.
>>
>> It is not clear if I'll have to do it for my new gig -- we can get away 
>> without it.
>>   
>>     
> I eager to see it If anyone is developing igmpxproxy mode patch for xorp.
> Many can be benefited form it as it may be the requirement in major
> scenarios
> as very rare ISPs providing PIM access.
>   
Personally I don't want to be funded or to fund.

I have few ideas to take community opinion, weather they are implementable?

If I am going to be, who contribute patch (in C lang , as loadable
kerenl module, as
 current c++ code of xorp may be long path for such editing)

If I would Develop such netfilter module (for sbunet's main RP xorp),
that catches
PIM join messages (and then identify the group address from the PIM join
message's packet)
And send subsequent IGMP group join packet to upstream ISP router.

And All multi-cast traffic then come to local subnet for those group on
which local RP have PIM join :) 

Will xorp able to transmit/forward these multicast traffic to
appropriate grop subscribers , to its further
subnets?

Will this workable as per protocol?
 
          (IGMP) ISP
            |
            |
            X - xorp Router (with small pim-igmp proxy)
            |    (local RP)
            |
       ----------------------------------------
       |                                               |
       Y router(internal)               Z router (internal)

Thanks,
Saurabh