Midi to ethernet broadcast program

I require a program which will run on Mac OS X 10.4 and 10.5 universal that will send a packet to the network (as broadcast or a specific ip) which contains midi information. I have a C program what will do networks packets, this is easy but I don't understand midi enough to send some midi packets. ## Deliverables the following must be configurable some how ( in code is fine if it's c) but must be on a form for a cocoa app. IP addresss to send packet (must be able to handle broadcast) Various ids for midi like control channel and value.