Berkeley Packet Filter (BPF): Packet Capture and Filtering in C
· 32 min read
Be conservative in what you do, be liberal in what you accept from others. - RFC 793
Preamble: From Telecommunication to Packet Filtering
Throughout the course of humanity, we have witnessed various forms of communication. We use language to communicate on a daily basis. Writing letters is also a form of communication, albeit a form which has slow transmission and reception time. Then came the era of telecommunication. Through the use of electronic and electrical means, we soon came to the realization that communication can be instantaneous. This, I believe, is one of the greatest achievement for mankind. This really made the world feel like a small village. The Internet is the closest to the anywhere door we know from Doraemon.