ARM - TCP/IP Networking Suite (UDP-IGMP)

Hi All,

Currently I am working with RL-TCPnet. I'm attempt to build a network by using UDP communication protocol(with broadcast, unicast, and multicast). I had bought a LPC1700 Evaluation Board for testing. And now, i have facing a problem on how to use the IGMP. As what we known, to fully support for IP multicasting, it requires implementation of the IGMP. The creation and maintenance of a “host group” is belongs to a “multicast agent”.

May i know LPC17xx ARM MCU able to act as the “multicast agent”? I have try to understand some functions which is related to UDP and IGMP. For example,init_igmp(), run_igmp_host(), process_igmp(), udp_send(), udp_mcast_ttl, igmp_join(), igmp_leave() and so on. But, i can't get a solid description on the functions usage. Thus, till now i'm still no idea with how to use it to implement a UDP network with broadcast, unicast, and multicast capability.

Any body have idea on how to use UDP and IGMP to implement IP multicasting feature?

Appreciate for yours prompt reply.

Thanks a lot !

Regards,
CS