Calculate all network IP adresses from a IP and a netmask

all_network_adresses_from_ip_and_netmask.py

#!/usr/bin/env python3

import struct
import socket


def ip2int(addr):
	return struct.unpack("!I", socket.inet_aton(addr))[0]


def int2ip(addr):
	return socket.inet_ntoa(struct.pack("!I", addr))


def get_ip_list(ip: str, netmask: str):
	i_ip = ip2int(ip)
	i_netmask = ip2int(netmask)

	i_network = i_ip & i_netmask
	i_bcast = i_network | (~ i_netmask & 0x0FFFF)

	ip_list = list()
	for i_ip in range(i_network + 1, i_bcast):
		s_network = int2ip(i_ip)
		ip_list.append(s_network)

	return ip_list


if __name__ == "__main__":
	## Example
	ip = "10.8.9.210"
	netmask = "255.255.255.128"

	ip_list = get_ip_list(ip, netmask)

	for ip in ip_list:
		print(ip)