Created
June 4, 2013 23:34
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public static bool IsInSubnet(this IPAddress address, string subnets) | |
{ | |
if (String.IsNullOrEmpty(subnets)) | |
return false; // default allowed or not ? | |
if (address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetworkV6) | |
{ | |
return false; | |
} | |
var subnet_splitted = subnets.Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries); | |
return subnet_splitted.Any(subnet => | |
{ | |
var parts = subnet.Split('/'); | |
var target = IPAddress.Parse(parts[0]); | |
IPAddress mask = new IPAddress(mask32); | |
if (parts.Length > 1) | |
IPAddress.TryParse(parts[1], out mask); | |
IPAddress network1 = address.GetNetworkAddress(mask); | |
IPAddress network2 = target.GetNetworkAddress(mask); | |
return network1.Equals(network2); | |
}); | |
} |
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