public static List<Network> LoadFromFile(string filename)
{
List<Network> networks = new List<Network>();
StreamReader reader;
string pattern;
string line;
int lineNumber = 1;
Match match;
IPAddress ipAddress;
string subnet;
Network network;
reader = File.OpenText(filename);
//string pattern = @"(?:(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.)(?:(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.)(?:(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.)(?:(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))/(?:([1-2][0-9]|3[0-2]|[0-9]))";
pattern = @"((?<ip>((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)))/(?<subnet>([1-2][0-9]|3[0-2]|[0-9])))";
while (!reader.EndOfStream) {
line = reader.ReadLine();
if (line.Contains("subnet")) continue;
match = Regex.Match(line, pattern);
if (match.Success) {
ipAddress = IPAddress.Parse(match.Groups["ip"].Value);
subnet = match.Groups["subnet"].Value;
network = new Network(ipAddress, subnet);
try {
networks.Add(network);
}
catch {
#if DEBUG
Console.WriteLine("{0} is a duplicate. Line {1}", match.Groups["ip"].Value, lineNumber);
#endif
}
}
#if DEBUG
else {
Console.WriteLine("Skipping line {0}", lineNumber);
}
#endif
lineNumber++;
}
#if DEBUG
Console.WriteLine("Last Line {0}", lineNumber);
#endif
reader.Close();
return networks;
}
public bool Overlap(Network network)
{
if (network.LastHostValue < NetworkValue) return false;
if (network.NetworkValue < NetworkValue && NetworkValue < network.LastHostValue) return true;
if (network.NetworkValue < NetworkValue && LastHostValue < network.LastHostValue) return true;
if (NetworkValue < network.NetworkValue && network.LastHostValue < LastHostValue) return true;
if (network.NetworkValue < LastHostValue && LastHostValue < network.LastHostValue) return true;
if (LastHostValue < network.NetworkValue) return false;
return true;
}