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cache subnet results

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This commit is contained in:
Luke Pulverenti 2017-10-27 00:14:45 -04:00
parent 902101355a
commit 44a270fa6f
1 changed files with 37 additions and 39 deletions
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72
Emby.Server.Implementations/Networking/NetworkManager.cs
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@ -120,6 +120,36 @@ namespace Emby.Server.Implementations.Networking
endpoint.StartsWith("169.", StringComparison.OrdinalIgnoreCase) endpoint.StartsWith("169.", StringComparison.OrdinalIgnoreCase)
) )
{ {
var subnets = GetSubnets(endpointFirstPart);
foreach (var subnet_Match in subnets)
{
//Logger.Debug("subnet_Match:" + subnet_Match);
if (endpoint.StartsWith(subnet_Match + ".", StringComparison.OrdinalIgnoreCase))
{
return true;
}
}
}
return false;
}
private Dictionary<string, List<string>> _subnetLookup = new Dictionary<string, List<string>>(StringComparer.Ordinal);
private List<string> GetSubnets(string endpointFirstPart)
{
List<string> subnets;
lock (_subnetLookup)
{
if (_subnetLookup.TryGetValue(endpointFirstPart, out subnets))
{
return subnets;
}
subnets = new List<string>();
foreach (NetworkInterface adapter in NetworkInterface.GetAllNetworkInterfaces()) foreach (NetworkInterface adapter in NetworkInterface.GetAllNetworkInterfaces())
{ {
foreach (UnicastIPAddressInformation unicastIPAddressInformation in adapter.GetIPProperties().UnicastAddresses) foreach (UnicastIPAddressInformation unicastIPAddressInformation in adapter.GetIPProperties().UnicastAddresses)
@ -135,51 +165,19 @@ namespace Emby.Server.Implementations.Networking
var subnet_Match = String.Join(".", unicastIPAddressInformation.Address.ToString().Split('.').Take(subnet_Test).ToArray()); var subnet_Match = String.Join(".", unicastIPAddressInformation.Address.ToString().Split('.').Take(subnet_Test).ToArray());
if (endpoint.StartsWith(subnet_Match + ".", StringComparison.OrdinalIgnoreCase)) // TODO: Is this check necessary?
if (adapter.OperationalStatus == OperationalStatus.Up)
{ {
return true; subnets.Add(subnet_Match);
}
} }
} }
} }
} }
return false; _subnetLookup[endpointFirstPart] = subnets;
}
private Dictionary<string, string> _subnetLookup = new Dictionary<string, string>(StringComparer.Ordinal); return subnets;
private string GetSubnet(string endpointFirstPart)
{
string subnet_Match = "";
lock (_subnetLookup)
{
if (_subnetLookup.TryGetValue(endpointFirstPart, out subnet_Match))
{
return subnet_Match;
} }
foreach (NetworkInterface adapter in NetworkInterface.GetAllNetworkInterfaces())
foreach (UnicastIPAddressInformation unicastIPAddressInformation in adapter.GetIPProperties().UnicastAddresses)
if (unicastIPAddressInformation.Address.AddressFamily == AddressFamily.InterNetwork && endpointFirstPart == unicastIPAddressInformation.Address.ToString().Split('.')[0])
{
int subnet_Test = 0;
foreach (string part in unicastIPAddressInformation.IPv4Mask.ToString().Split('.'))
{
if (part.Equals("0")) break;
subnet_Test++;
}
subnet_Match = String.Join(".", unicastIPAddressInformation.Address.ToString().Split('.').Take(subnet_Test).ToArray());
}
if (!string.IsNullOrWhiteSpace(subnet_Match))
{
_subnetLookup[endpointFirstPart] = subnet_Match;
}
}
return subnet_Match;
} }
private bool Is172AddressPrivate(string endpoint) private bool Is172AddressPrivate(string endpoint)