Send data from computer to de2-115

hi

I can send udp packet from de2-115 to computer. and I want to sen data from computer to de2-115. Can any one help me?

I use this design example.

ftp://ftp.altera.com/up/pub/altera_material/14.1/tutorials/de2-115/using_triple_speed_ethernet.zip

Thanks a lot