I am trying to learn Rust programming language. Here is a small project that sniffs the ports of a given host. I want to give some info what is port, tcp and host.

port: a number that is used to identify a specific process to which an incoming network message is to be forwarded to.

tcp: a protocol that is used to establish a connection between two hosts.

host: a computer that is connected to a network.

Port sniffing is a technique that is used to scan the ports of a host. It is used to find out which ports are open and which are closed. It is also used to find out which services are running on a host.

The program sends a TCP SYN packet to the host and waits for a response. If the port is open, the host will send a TCP SYN/ACK packet. If the port is closed, the host will send a TCP RST packet. ....

Diagram:

• unwrap: unwrap is used to get the value of a Result. If the Result is an Err, unwrap will panic. it is good if you dont want to handle the error.
• move: simply move ownership into a closure.
• match: works like switch case in other languages.
• drop: dispose of a value.
• &'static str: a string that lives for the entire duration of the program.
• io::stdout().flush(): flushes the buffer of the stdout.
• thread::spawn: spawns a new thread.
• afunc()?: the ? means that if the result of afunc() is an Err, the whole function will return the Err value.

cargo run -- -j <threads> <ipaddr>

cargo run -- -j 10000 192.168.1.1

....
Open ports: (4 total)
53
80
52869
443

cargo build

cargo run

Licensed under the MIT license. See the LICENSE file for details.