Sample code of flooding network with raw socket - http://www.lainoox.com/c-syn-flood-raw-socket/

C99 socket programming - http://gustedt.wordpress.com/2011/10/24/socket-programming-and-c99/

How to Perform Packet Sniffing Using Libpcap with C Example Code - http://www.thegeekstuff.com/2012/10/packet-sniffing-using-libpcap/