change C program to send diffrent UDP packet

I have a small C program that is compiled in? Linux? that send an SNMP request to a host. I would like to change the SNMP and send a sip packet instead. and parse? the? results. Thats it. A? knowledge of C and sockets is? required. IT is already created so this will require minimum? recreation? of code.? ## Deliverables I want to software to send the sip packet just like the script doe sand get a response just like the script does just parse the results? differently. A way to choose what the outgoing packet will be would be most helpful.