Practicing Rust.
Exercise after Watching Tensor Programming's Rustlang Project: Port Sniffer CLI video tutorial:
Source: https://www.youtube.com/watch?v=-Jp7sabBCp4&index=16&list=PLJbE2Yu2zumDF6BX6_RdPisRVHgzV02NW
Original implementation: https://github.com/tensor-programming/Rust_Port_Sniffer
structopt
crate https://docs.rs/structopt/0.2.5/structopt/channels
(rust by example) https://rustbyexample.com/std_misc/channels.html