read_rules.cs

using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace simplePackageFilter
{
    public class Rules
    {

        public string[] accepted_ports = File.ReadAllLines("../../input_data/whitelist_ports_src.txt");
        public string[] accepted_sources = File.ReadAllLines("../../input_data/whitelist_src.txt");
        public string[] accepted_destinations = File.ReadAllLines("../../input_data/whitelist_dest.txt");
        public string[] blacklisted_destinations = File.ReadAllLines("../../input_data/blacklist.txt");

        //public int[] Ip_str_to_int_array(string ip)
        //{
        //    int[] ip_array = new int[4];
        //    ip_array = ip.Split('.').Select(Int32.Parse).ToArray();
        //    return ip_array;
        //}

        private (byte[], byte[]) Ip_str_to_byte_array(string ip)
        {
            string[] ip_array = new string[2];
            int[] low = new int[4];
            int[] high = new int[4];
            byte[] byte_low = new byte[4];
            byte[] byte_high = new byte[4];

            // Splits 'x.x.x.x-y.y.y.y' in two
            ip_array = ip.Split('-');
            // Splits both strings by '.' into lists, converts to int
            low = ip_array[0].Split('.').Select(Int32.Parse).ToArray();
            high = ip_array[1].Split('.').Select(Int32.Parse).ToArray();
            // Converts low/high (lists) into byte arrays
            byte_low  = low.Select(i => (byte) i).ToArray();
            byte_high = high.Select(i => (byte) i).ToArray();

            return (byte_low, byte_high);
        }

        public (byte[], byte[]) Get_sources(int x)
        {
            return (Ip_str_to_byte_array(this.accepted_sources[x]));
        }

        public (byte[], byte[]) Get_destination(int x)
        {
            return (Ip_str_to_byte_array(this.accepted_destinations[x]));
        }

        public (byte[], byte[]) Get_blacklisted_destinations(int x)
        {
            return (Ip_str_to_byte_array(this.blacklisted_destinations[x]));
        }

    }
}