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NetworkBlock.cs
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129 lines (110 loc) · 3.84 KB
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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using log4net;
using L2dotNET.DataContracts;
using L2dotNET.Models;
using L2dotNET.Utility;
namespace L2dotNET.Network
{
class NetworkBlock
{
private static readonly ILog Log = LogManager.GetLogger(typeof(NetworkBlock));
private static volatile NetworkBlock _instance;
private static readonly object SyncRoot = new object();
public static NetworkBlock Instance
{
get
{
if (_instance != null)
return _instance;
lock (SyncRoot)
{
if (_instance == null)
_instance = new NetworkBlock();
}
return _instance;
}
}
protected List<NetworkBlockModel> Blocks = new List<NetworkBlockModel>();
public void Initialize()
{
using (StreamReader reader = new StreamReader(new FileInfo(@"sq\blocks.txt").FullName))
{
while (!reader.EndOfStream)
{
string line = reader.ReadLine() ?? string.Empty;
if (line.Length == 0)
continue;
if (line.StartsWithIgnoreCase("//"))
continue;
if (line.StartsWithIgnoreCase("d"))
{
NetworkBlockModel nbModel = new NetworkBlockModel
{
DirectIp = line.Split(' ')[1],
Permanent = line.Split(' ')[2].EqualsIgnoreCase("0")
};
Blocks.Add(nbModel);
}
else
{
if (!line.StartsWithIgnoreCase("m"))
continue;
NetworkBlockModel nbModel = new NetworkBlockModel
{
Mask = line.Split(' ')[1],
Permanent = line.Split(' ')[2].EqualsIgnoreCase("0")
};
Blocks.Add(nbModel);
}
}
}
Log.Info($"NetworkBlock: {Blocks.Count} blocks.");
}
public bool Allowed(string ip)
{
if (Blocks.Count == 0)
return true;
foreach (NetworkBlockModel nbi in Blocks)
{
if (nbi.DirectIp?.Equals(ip) ?? false)
{
if (nbi.Permanent)
return false;
if (nbi.TimeEnd.CompareTo(DateTime.Now) == 1)
return false;
}
if (nbi.Mask == null)
continue;
string[] a = ip.Split('.'),
b = nbi.Mask.Split('.');
bool[] d = new bool[4];
for (int c = 0; c < 4; c++)
{
d[c] = false;
if (b[c] == "*")
d[c] = true;
else
{
if (b[c] == a[c])
d[c] = true;
else
{
if (!b[c].Contains("/"))
continue;
short n = short.Parse(b[c].Split('/')[0]),
x = short.Parse(b[c].Split('/')[1]);
short t = short.Parse(a[c]);
d[c] = (t >= n) && (t <= x);
}
}
}
if (d.Any(u => u))
return false;
}
return true;
}
}
}