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Diffstat (limited to 'Mono.Nat/Pmp/PmpSearcher.cs')
| -rw-r--r-- | Mono.Nat/Pmp/PmpSearcher.cs | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/Mono.Nat/Pmp/PmpSearcher.cs b/Mono.Nat/Pmp/PmpSearcher.cs deleted file mode 100644 index 46c2e9d80..000000000 --- a/Mono.Nat/Pmp/PmpSearcher.cs +++ /dev/null @@ -1,235 +0,0 @@ -// -// Authors: -// Alan McGovern alan.mcgovern@gmail.com -// Ben Motmans <ben.motmans@gmail.com> -// Nicholas Terry <nick.i.terry@gmail.com> -// -// Copyright (C) 2006 Alan McGovern -// Copyright (C) 2007 Ben Motmans -// Copyright (C) 2014 Nicholas Terry -// -// Permission is hereby granted, free of charge, to any person obtaining -// a copy of this software and associated documentation files (the -// "Software"), to deal in the Software without restriction, including -// without limitation the rights to use, copy, modify, merge, publish, -// distribute, sublicense, and/or sell copies of the Software, and to -// permit persons to whom the Software is furnished to do so, subject to -// the following conditions: -// -// The above copyright notice and this permission notice shall be -// included in all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, -// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND -// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE -// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION -// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. -// - - -using System; -using System.Collections.Generic; -using System.Text; -using System.Net; -using Mono.Nat.Pmp; -using System.Net.NetworkInformation; -using System.Net.Sockets; -using System.Threading.Tasks; -using Microsoft.Extensions.Logging; -using System.Linq; - -namespace Mono.Nat -{ - internal class PmpSearcher : ISearcher, IDisposable - { - private ILogger _logger; - - private int timeout = 250; - private DateTime nextSearch; - public event EventHandler<DeviceEventArgs> DeviceFound; - - public PmpSearcher(ILogger logger) - { - _logger = logger; - - CreateSocketsAndAddGateways(); - } - - public void Dispose() - { - var list = sockets.ToList(); - sockets.Clear(); - - foreach (var s in list) - { - using (s) - { - s.Close(); - } - } - } - - private List<UdpClient> sockets; - private Dictionary<UdpClient, List<IPEndPoint>> gatewayLists; - - private void CreateSocketsAndAddGateways() - { - sockets = new List<UdpClient>(); - gatewayLists = new Dictionary<UdpClient, List<IPEndPoint>>(); - - try - { - foreach (var n in NetworkInterface.GetAllNetworkInterfaces()) - { - if (n.OperationalStatus != OperationalStatus.Up && n.OperationalStatus != OperationalStatus.Unknown) - continue; - IPInterfaceProperties properties = n.GetIPProperties(); - var gatewayList = new List<IPEndPoint>(); - - foreach (GatewayIPAddressInformation gateway in properties.GatewayAddresses) - { - if (gateway.Address.AddressFamily == AddressFamily.InterNetwork) - { - gatewayList.Add(new IPEndPoint(gateway.Address, PmpConstants.ServerPort)); - } - } - if (gatewayList.Count == 0) - { - /* Mono on OSX doesn't give any gateway addresses, so check DNS entries */ - foreach (var gw2 in properties.DnsAddresses) - { - if (gw2.AddressFamily == AddressFamily.InterNetwork) - { - gatewayList.Add(new IPEndPoint(gw2, PmpConstants.ServerPort)); - } - } - foreach (UnicastIPAddressInformation unicast in properties.UnicastAddresses) - { - if (/*unicast.DuplicateAddressDetectionState == DuplicateAddressDetectionState.Preferred - && unicast.AddressPreferredLifetime != UInt32.MaxValue - && */unicast.Address.AddressFamily == AddressFamily.InterNetwork) - { - var bytes = unicast.Address.GetAddressBytes(); - bytes[3] = 1; - gatewayList.Add(new IPEndPoint(new IPAddress(bytes), PmpConstants.ServerPort)); - } - } - } - - if (gatewayList.Count > 0) - { - foreach (var address in properties.UnicastAddresses) - { - if (address.Address.AddressFamily == AddressFamily.InterNetwork) - { - UdpClient client; - - try - { - client = new UdpClient(new IPEndPoint(address.Address, 0)); - } - catch (SocketException) - { - continue; // Move on to the next address. - } - - gatewayLists.Add(client, gatewayList); - sockets.Add(client); - } - } - } - } - } - catch (Exception) - { - // NAT-PMP does not use multicast, so there isn't really a good fallback. - } - } - - public async void Search() - { - foreach (UdpClient s in sockets) - { - try - { - await Search(s).ConfigureAwait(false); - } - catch - { - // Ignore any search errors - } - } - } - - async Task Search(UdpClient client) - { - // Sort out the time for the next search first. The spec says the - // timeout should double after each attempt. Once it reaches 64 seconds - // (and that attempt fails), assume no devices available - nextSearch = DateTime.Now.AddMilliseconds(timeout); - timeout *= 2; - - // We've tried 9 times as per spec, try searching again in 5 minutes - if (timeout == 128 * 1000) - { - timeout = 250; - nextSearch = DateTime.Now.AddMinutes(10); - return; - } - - // The nat-pmp search message. Must be sent to GatewayIP:53531 - byte[] buffer = new byte[] { PmpConstants.Version, PmpConstants.OperationCode }; - foreach (IPEndPoint gatewayEndpoint in gatewayLists[client]) - { - await client.SendAsync(buffer, buffer.Length, gatewayEndpoint).ConfigureAwait(false); - } - } - - bool IsSearchAddress(IPAddress address) - { - foreach (var gatewayList in gatewayLists.Values) - foreach (var gatewayEndpoint in gatewayList) - if (gatewayEndpoint.Address.Equals(address)) - return true; - return false; - } - - public void Handle(IPAddress localAddress, byte[] response, IPEndPoint endpoint) - { - if (!IsSearchAddress(endpoint.Address)) - return; - if (response.Length != 12) - return; - if (response[0] != PmpConstants.Version) - return; - if (response[1] != PmpConstants.ServerNoop) - return; - int errorcode = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(response, 2)); - if (errorcode != 0) - _logger.LogDebug("Non zero error: {0}", errorcode); - - var publicIp = new IPAddress(new byte[] { response[8], response[9], response[10], response[11] }); - nextSearch = DateTime.Now.AddMinutes(5); - timeout = 250; - - OnDeviceFound(new DeviceEventArgs(new PmpNatDevice(endpoint.Address, publicIp, _logger))); - } - - public DateTime NextSearch - { - get { return nextSearch; } - } - private void OnDeviceFound(DeviceEventArgs args) - { - if (DeviceFound != null) - DeviceFound(this, args); - } - - public NatProtocol Protocol - { - get { return NatProtocol.Pmp; } - } - } -} |