Question about multicast forwarding

[dave jones]

Hi,

I have the following networks:

 -----------------------------------------------
     |                          |
     |                          |
   iptv device (172.16.113.2) FreeBSD (re0:172.16.113.8)
                                |     (re1:172.16.112.2)
                                |
                               PCs

The iptv device which sends to multicast 224.0.3.2, I want my PCs to
receive multicast packets and let clients watch TV.
Should I use net/mrouted or use pf can do that?
Would anyone tell me how to do? Thanks.

Cheers,
Dave.