Chapter 4. IEEE 802.3 Wired Network Manipulation with Perl
In this chapter, we will write our own packet capturing and network manipulation tools using Perl programming. Up to this point, we have already written packet sniffing programs that disassemble packets to analyze their layers. We have also learned how to create Pcap syntax filters to capture only specific packets that meet our needs. The first section of this chapter is on packet capturing and takes us further into packet analysis and filtering. The second section, in which we learn more about network traffic manipulation, combines our passive packet sniffing with a more active approach. Finally, the last section brings the two together into a single Perl program.