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651 lines
23 KiB
651 lines
23 KiB
//
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// Authors:
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// Alan McGovern alan.mcgovern@gmail.com
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// Ben Motmans <ben.motmans@gmail.com>
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//
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// Copyright (C) 2006 Alan McGovern
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// Copyright (C) 2007 Ben Motmans
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.IO;
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using System.Net;
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using System.Xml;
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using System.Text;
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using System.Diagnostics;
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using MediaBrowser.Controller.Dlna;
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namespace Mono.Nat.Upnp
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{
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public sealed class UpnpNatDevice : AbstractNatDevice, IEquatable<UpnpNatDevice>
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{
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private EndPoint hostEndPoint;
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private IPAddress localAddress;
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private string serviceDescriptionUrl;
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private string controlUrl;
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private string serviceType;
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public override IPAddress LocalAddress
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{
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get { return localAddress; }
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}
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/// <summary>
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/// The callback to invoke when we are finished setting up the device
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/// </summary>
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private NatDeviceCallback callback;
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internal UpnpNatDevice(IPAddress localAddress, UpnpDeviceInfo deviceInfo, IPEndPoint hostEndPoint, string serviceType)
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{
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this.LastSeen = DateTime.Now;
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this.localAddress = localAddress;
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// Split the string at the "location" section so i can extract the ipaddress and service description url
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string locationDetails = deviceInfo.Location.ToString();
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this.serviceType = serviceType;
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// Make sure we have no excess whitespace
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locationDetails = locationDetails.Trim();
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// FIXME: Is this reliable enough. What if we get a hostname as opposed to a proper http address
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// Are we going to get addresses with the "http://" attached?
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if (locationDetails.StartsWith("http://", StringComparison.InvariantCultureIgnoreCase))
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{
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NatUtility.Log("Found device at: {0}", locationDetails);
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// This bit strings out the "http://" from the string
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locationDetails = locationDetails.Substring(7);
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this.hostEndPoint = hostEndPoint;
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NatUtility.Log("Parsed device as: {0}", this.hostEndPoint.ToString());
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// The service description URL is the remainder of the "locationDetails" string. The bit that was originally after the ip
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// and port information
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this.serviceDescriptionUrl = locationDetails.Substring(locationDetails.IndexOf('/'));
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}
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else
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{
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NatUtility.Log("Couldn't decode address. Please send following string to the developer: ");
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}
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}
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internal UpnpNatDevice (IPAddress localAddress, string deviceDetails, string serviceType)
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{
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this.LastSeen = DateTime.Now;
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this.localAddress = localAddress;
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// Split the string at the "location" section so i can extract the ipaddress and service description url
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string locationDetails = deviceDetails.Substring(deviceDetails.IndexOf("Location", StringComparison.InvariantCultureIgnoreCase) + 9).Split('\r')[0];
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this.serviceType = serviceType;
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// Make sure we have no excess whitespace
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locationDetails = locationDetails.Trim();
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// FIXME: Is this reliable enough. What if we get a hostname as opposed to a proper http address
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// Are we going to get addresses with the "http://" attached?
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if (locationDetails.StartsWith("http://", StringComparison.InvariantCultureIgnoreCase))
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{
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NatUtility.Log("Found device at: {0}", locationDetails);
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// This bit strings out the "http://" from the string
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locationDetails = locationDetails.Substring(7);
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// We then split off the end of the string to get something like: 192.168.0.3:241 in our string
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string hostAddressAndPort = locationDetails.Remove(locationDetails.IndexOf('/'));
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// From this we parse out the IP address and Port
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if (hostAddressAndPort.IndexOf(':') > 0)
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{
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this.hostEndPoint = new IPEndPoint(IPAddress.Parse(hostAddressAndPort.Remove(hostAddressAndPort.IndexOf(':'))),
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Convert.ToUInt16(hostAddressAndPort.Substring(hostAddressAndPort.IndexOf(':') + 1), System.Globalization.CultureInfo.InvariantCulture));
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}
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else
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{
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// there is no port specified, use default port (80)
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this.hostEndPoint = new IPEndPoint(IPAddress.Parse(hostAddressAndPort), 80);
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}
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NatUtility.Log("Parsed device as: {0}", this.hostEndPoint.ToString());
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// The service description URL is the remainder of the "locationDetails" string. The bit that was originally after the ip
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// and port information
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this.serviceDescriptionUrl = locationDetails.Substring(locationDetails.IndexOf('/'));
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}
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else
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{
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Trace.WriteLine("Couldn't decode address. Please send following string to the developer: ");
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Trace.WriteLine(deviceDetails);
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}
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}
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/// <summary>
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/// The EndPoint that the device is at
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/// </summary>
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internal EndPoint HostEndPoint
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{
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get { return this.hostEndPoint; }
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}
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/// <summary>
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/// The relative url of the xml file that describes the list of services is at
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/// </summary>
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internal string ServiceDescriptionUrl
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{
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get { return this.serviceDescriptionUrl; }
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}
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/// <summary>
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/// The relative url that we can use to control the port forwarding
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/// </summary>
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internal string ControlUrl
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{
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get { return this.controlUrl; }
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}
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/// <summary>
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/// The service type we're using on the device
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/// </summary>
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public string ServiceType
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{
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get { return serviceType; }
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}
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/// <summary>
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/// Begins an async call to get the external ip address of the router
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/// </summary>
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public override IAsyncResult BeginGetExternalIP(AsyncCallback callback, object asyncState)
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{
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// Create the port map message
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GetExternalIPAddressMessage message = new GetExternalIPAddressMessage(this);
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return BeginMessageInternal(message, callback, asyncState, EndGetExternalIPInternal);
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}
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/// <summary>
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/// Maps the specified port to this computer
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/// </summary>
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public override IAsyncResult BeginCreatePortMap(Mapping mapping, AsyncCallback callback, object asyncState)
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{
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CreatePortMappingMessage message = new CreatePortMappingMessage(mapping, localAddress, this);
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return BeginMessageInternal(message, callback, asyncState, EndCreatePortMapInternal);
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}
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/// <summary>
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/// Removes a port mapping from this computer
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/// </summary>
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public override IAsyncResult BeginDeletePortMap(Mapping mapping, AsyncCallback callback, object asyncState)
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{
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DeletePortMappingMessage message = new DeletePortMappingMessage(mapping, this);
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return BeginMessageInternal(message, callback, asyncState, EndDeletePortMapInternal);
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}
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public override IAsyncResult BeginGetAllMappings(AsyncCallback callback, object asyncState)
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{
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GetGenericPortMappingEntry message = new GetGenericPortMappingEntry(0, this);
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return BeginMessageInternal(message, callback, asyncState, EndGetAllMappingsInternal);
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}
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public override IAsyncResult BeginGetSpecificMapping (Protocol protocol, int port, AsyncCallback callback, object asyncState)
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{
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GetSpecificPortMappingEntryMessage message = new GetSpecificPortMappingEntryMessage(protocol, port, this);
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return this.BeginMessageInternal(message, callback, asyncState, new AsyncCallback(this.EndGetSpecificMappingInternal));
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="result"></param>
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public override void EndCreatePortMap(IAsyncResult result)
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{
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if (result == null) throw new ArgumentNullException("result");
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PortMapAsyncResult mappingResult = result as PortMapAsyncResult;
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if (mappingResult == null)
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throw new ArgumentException("Invalid AsyncResult", "result");
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// Check if we need to wait for the operation to finish
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if (!result.IsCompleted)
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result.AsyncWaitHandle.WaitOne();
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// If we have a saved exception, it means something went wrong during the mapping
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// so we just rethrow the exception and let the user figure out what they should do.
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if (mappingResult.SavedMessage is ErrorMessage)
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{
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ErrorMessage msg = mappingResult.SavedMessage as ErrorMessage;
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throw new MappingException(msg.ErrorCode, msg.Description);
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}
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//return result.AsyncState as Mapping;
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="result"></param>
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public override void EndDeletePortMap(IAsyncResult result)
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{
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if (result == null)
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throw new ArgumentNullException("result");
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PortMapAsyncResult mappingResult = result as PortMapAsyncResult;
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if (mappingResult == null)
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throw new ArgumentException("Invalid AsyncResult", "result");
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// Check if we need to wait for the operation to finish
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if (!mappingResult.IsCompleted)
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mappingResult.AsyncWaitHandle.WaitOne();
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// If we have a saved exception, it means something went wrong during the mapping
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// so we just rethrow the exception and let the user figure out what they should do.
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if (mappingResult.SavedMessage is ErrorMessage)
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{
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ErrorMessage msg = mappingResult.SavedMessage as ErrorMessage;
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throw new MappingException(msg.ErrorCode, msg.Description);
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}
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// If all goes well, we just return
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//return true;
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}
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public override Mapping[] EndGetAllMappings(IAsyncResult result)
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{
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if (result == null)
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throw new ArgumentNullException("result");
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GetAllMappingsAsyncResult mappingResult = result as GetAllMappingsAsyncResult;
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if (mappingResult == null)
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throw new ArgumentException("Invalid AsyncResult", "result");
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if (!mappingResult.IsCompleted)
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mappingResult.AsyncWaitHandle.WaitOne();
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if (mappingResult.SavedMessage is ErrorMessage)
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{
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ErrorMessage msg = mappingResult.SavedMessage as ErrorMessage;
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if (msg.ErrorCode != 713)
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throw new MappingException(msg.ErrorCode, msg.Description);
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}
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return mappingResult.Mappings.ToArray();
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}
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/// <summary>
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/// Ends an async request to get the external ip address of the router
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/// </summary>
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public override IPAddress EndGetExternalIP(IAsyncResult result)
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{
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if (result == null) throw new ArgumentNullException("result");
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PortMapAsyncResult mappingResult = result as PortMapAsyncResult;
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if (mappingResult == null)
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throw new ArgumentException("Invalid AsyncResult", "result");
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if (!result.IsCompleted)
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result.AsyncWaitHandle.WaitOne();
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if (mappingResult.SavedMessage is ErrorMessage)
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{
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ErrorMessage msg = mappingResult.SavedMessage as ErrorMessage;
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throw new MappingException(msg.ErrorCode, msg.Description);
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}
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if (mappingResult.SavedMessage == null)
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return null;
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else
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return ((GetExternalIPAddressResponseMessage)mappingResult.SavedMessage).ExternalIPAddress;
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}
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public override Mapping EndGetSpecificMapping(IAsyncResult result)
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{
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if (result == null)
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throw new ArgumentNullException("result");
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GetAllMappingsAsyncResult mappingResult = result as GetAllMappingsAsyncResult;
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if (mappingResult == null)
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throw new ArgumentException("Invalid AsyncResult", "result");
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if (!mappingResult.IsCompleted)
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mappingResult.AsyncWaitHandle.WaitOne();
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if (mappingResult.SavedMessage is ErrorMessage)
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{
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ErrorMessage message = mappingResult.SavedMessage as ErrorMessage;
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if (message.ErrorCode != 0x2ca)
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{
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throw new MappingException(message.ErrorCode, message.Description);
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}
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}
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if (mappingResult.Mappings.Count == 0)
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return new Mapping (Protocol.Tcp, -1, -1);
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return mappingResult.Mappings[0];
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}
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public override bool Equals(object obj)
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{
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UpnpNatDevice device = obj as UpnpNatDevice;
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return (device == null) ? false : this.Equals((device));
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}
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public bool Equals(UpnpNatDevice other)
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{
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return (other == null) ? false : (this.hostEndPoint.Equals(other.hostEndPoint)
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//&& this.controlUrl == other.controlUrl
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&& this.serviceDescriptionUrl == other.serviceDescriptionUrl);
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}
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public override int GetHashCode()
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{
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return (this.hostEndPoint.GetHashCode() ^ this.controlUrl.GetHashCode() ^ this.serviceDescriptionUrl.GetHashCode());
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}
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private IAsyncResult BeginMessageInternal(MessageBase message, AsyncCallback storedCallback, object asyncState, AsyncCallback callback)
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{
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byte[] body;
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WebRequest request = message.Encode(out body);
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PortMapAsyncResult mappingResult = PortMapAsyncResult.Create(message, request, storedCallback, asyncState);
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if (body.Length > 0)
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{
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request.ContentLength = body.Length;
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request.BeginGetRequestStream(delegate(IAsyncResult result) {
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try
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{
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Stream s = request.EndGetRequestStream(result);
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s.Write(body, 0, body.Length);
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request.BeginGetResponse(callback, mappingResult);
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}
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catch (Exception ex)
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{
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mappingResult.Complete(ex);
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}
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}, null);
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}
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else
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{
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request.BeginGetResponse(callback, mappingResult);
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}
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return mappingResult;
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}
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private void CompleteMessage(IAsyncResult result)
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{
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PortMapAsyncResult mappingResult = result.AsyncState as PortMapAsyncResult;
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mappingResult.CompletedSynchronously = result.CompletedSynchronously;
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mappingResult.Complete();
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}
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private MessageBase DecodeMessageFromResponse(Stream s, long length)
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{
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StringBuilder data = new StringBuilder();
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int bytesRead = 0;
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int totalBytesRead = 0;
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byte[] buffer = new byte[10240];
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// Read out the content of the message, hopefully picking everything up in the case where we have no contentlength
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if (length != -1)
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{
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while (totalBytesRead < length)
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{
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bytesRead = s.Read(buffer, 0, buffer.Length);
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data.Append(Encoding.UTF8.GetString(buffer, 0, bytesRead));
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totalBytesRead += bytesRead;
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}
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}
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else
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{
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while ((bytesRead = s.Read(buffer, 0, buffer.Length)) != 0)
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data.Append(Encoding.UTF8.GetString(buffer, 0, bytesRead));
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}
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// Once we have our content, we need to see what kind of message it is. It'll either a an error
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// or a response based on the action we performed.
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return MessageBase.Decode(this, data.ToString());
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}
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private void EndCreatePortMapInternal(IAsyncResult result)
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{
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EndMessageInternal(result);
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CompleteMessage(result);
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}
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private void EndMessageInternal(IAsyncResult result)
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{
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HttpWebResponse response = null;
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PortMapAsyncResult mappingResult = result.AsyncState as PortMapAsyncResult;
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try
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{
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try
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{
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response = (HttpWebResponse)mappingResult.Request.EndGetResponse(result);
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}
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catch (WebException ex)
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{
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// Even if the request "failed" i want to continue on to read out the response from the router
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response = ex.Response as HttpWebResponse;
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if (response == null)
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mappingResult.SavedMessage = new ErrorMessage((int)ex.Status, ex.Message);
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}
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if (response != null)
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mappingResult.SavedMessage = DecodeMessageFromResponse(response.GetResponseStream(), response.ContentLength);
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}
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finally
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{
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if (response != null)
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response.Close();
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}
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}
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private void EndDeletePortMapInternal(IAsyncResult result)
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{
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EndMessageInternal(result);
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CompleteMessage(result);
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}
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private void EndGetAllMappingsInternal(IAsyncResult result)
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{
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EndMessageInternal(result);
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GetAllMappingsAsyncResult mappingResult = result.AsyncState as GetAllMappingsAsyncResult;
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GetGenericPortMappingEntryResponseMessage message = mappingResult.SavedMessage as GetGenericPortMappingEntryResponseMessage;
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if (message != null)
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{
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Mapping mapping = new Mapping (message.Protocol, message.InternalPort, message.ExternalPort, message.LeaseDuration);
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mapping.Description = message.PortMappingDescription;
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mappingResult.Mappings.Add(mapping);
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GetGenericPortMappingEntry next = new GetGenericPortMappingEntry(mappingResult.Mappings.Count, this);
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// It's ok to do this synchronously because we should already be on anther thread
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// and this won't block the user.
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byte[] body;
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WebRequest request = next.Encode(out body);
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if (body.Length > 0)
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{
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request.ContentLength = body.Length;
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request.GetRequestStream().Write(body, 0, body.Length);
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}
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mappingResult.Request = request;
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request.BeginGetResponse(EndGetAllMappingsInternal, mappingResult);
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return;
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}
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CompleteMessage(result);
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}
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private void EndGetExternalIPInternal(IAsyncResult result)
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{
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EndMessageInternal(result);
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CompleteMessage(result);
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}
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private void EndGetSpecificMappingInternal(IAsyncResult result)
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{
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EndMessageInternal(result);
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GetAllMappingsAsyncResult mappingResult = result.AsyncState as GetAllMappingsAsyncResult;
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GetGenericPortMappingEntryResponseMessage message = mappingResult.SavedMessage as GetGenericPortMappingEntryResponseMessage;
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if (message != null) {
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Mapping mapping = new Mapping(mappingResult.SpecificMapping.Protocol, message.InternalPort, mappingResult.SpecificMapping.PublicPort, message.LeaseDuration);
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mapping.Description = mappingResult.SpecificMapping.Description;
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mappingResult.Mappings.Add(mapping);
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}
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CompleteMessage(result);
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}
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internal void GetServicesList(NatDeviceCallback callback)
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{
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// Save the callback so i can use it again later when i've finished parsing the services available
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this.callback = callback;
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// Create a HTTPWebRequest to download the list of services the device offers
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byte[] body;
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WebRequest request = new GetServicesMessage(this.serviceDescriptionUrl, this.hostEndPoint).Encode(out body);
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if (body.Length > 0)
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NatUtility.Log("Error: Services Message contained a body");
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request.BeginGetResponse(this.ServicesReceived, request);
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}
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private void ServicesReceived(IAsyncResult result)
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{
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HttpWebResponse response = null;
|
|
try
|
|
{
|
|
int abortCount = 0;
|
|
int bytesRead = 0;
|
|
byte[] buffer = new byte[10240];
|
|
StringBuilder servicesXml = new StringBuilder();
|
|
XmlDocument xmldoc = new XmlDocument();
|
|
HttpWebRequest request = result.AsyncState as HttpWebRequest;
|
|
response = request.EndGetResponse(result) as HttpWebResponse;
|
|
Stream s = response.GetResponseStream();
|
|
|
|
if (response.StatusCode != HttpStatusCode.OK) {
|
|
NatUtility.Log("{0}: Couldn't get services list: {1}", HostEndPoint, response.StatusCode);
|
|
return; // FIXME: This the best thing to do??
|
|
}
|
|
|
|
while (true)
|
|
{
|
|
bytesRead = s.Read(buffer, 0, buffer.Length);
|
|
servicesXml.Append(Encoding.UTF8.GetString(buffer, 0, bytesRead));
|
|
try
|
|
{
|
|
xmldoc.LoadXml(servicesXml.ToString());
|
|
response.Close();
|
|
break;
|
|
}
|
|
catch (XmlException)
|
|
{
|
|
// If we can't receive the entire XML within 500ms, then drop the connection
|
|
// Unfortunately not all routers supply a valid ContentLength (mine doesn't)
|
|
// so this hack is needed to keep testing our recieved data until it gets successfully
|
|
// parsed by the xmldoc. Without this, the code will never pick up my router.
|
|
if (abortCount++ > 50)
|
|
{
|
|
response.Close();
|
|
return;
|
|
}
|
|
NatUtility.Log("{0}: Couldn't parse services list", HostEndPoint);
|
|
System.Threading.Thread.Sleep(10);
|
|
}
|
|
}
|
|
|
|
NatUtility.Log("{0}: Parsed services list", HostEndPoint);
|
|
XmlNamespaceManager ns = new XmlNamespaceManager(xmldoc.NameTable);
|
|
ns.AddNamespace("ns", "urn:schemas-upnp-org:device-1-0");
|
|
XmlNodeList nodes = xmldoc.SelectNodes("//*/ns:serviceList", ns);
|
|
|
|
foreach (XmlNode node in nodes)
|
|
{
|
|
//Go through each service there
|
|
foreach (XmlNode service in node.ChildNodes)
|
|
{
|
|
//If the service is a WANIPConnection, then we have what we want
|
|
string type = service["serviceType"].InnerText;
|
|
NatUtility.Log("{0}: Found service: {1}", HostEndPoint, type);
|
|
StringComparison c = StringComparison.OrdinalIgnoreCase;
|
|
// TODO: Add support for version 2 of UPnP.
|
|
if (type.Equals("urn:schemas-upnp-org:service:WANPPPConnection:1", c) ||
|
|
type.Equals("urn:schemas-upnp-org:service:WANIPConnection:1", c))
|
|
{
|
|
this.controlUrl = service["controlURL"].InnerText;
|
|
NatUtility.Log("{0}: Found upnp service at: {1}", HostEndPoint, controlUrl);
|
|
try
|
|
{
|
|
Uri u = new Uri(controlUrl);
|
|
if (u.IsAbsoluteUri)
|
|
{
|
|
EndPoint old = hostEndPoint;
|
|
this.hostEndPoint = new IPEndPoint(IPAddress.Parse(u.Host), u.Port);
|
|
NatUtility.Log("{0}: Absolute URI detected. Host address is now: {1}", old, HostEndPoint);
|
|
this.controlUrl = controlUrl.Substring(u.GetLeftPart(UriPartial.Authority).Length);
|
|
NatUtility.Log("{0}: New control url: {1}", HostEndPoint, controlUrl);
|
|
}
|
|
}
|
|
catch
|
|
{
|
|
NatUtility.Log("{0}: Assuming control Uri is relative: {1}", HostEndPoint, controlUrl);
|
|
}
|
|
NatUtility.Log("{0}: Handshake Complete", HostEndPoint);
|
|
this.callback(this);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
//If we get here, it means that we didn't get WANIPConnection service, which means no uPnP forwarding
|
|
//So we don't invoke the callback, so this device is never added to our lists
|
|
}
|
|
catch (WebException ex)
|
|
{
|
|
// Just drop the connection, FIXME: Should i retry?
|
|
NatUtility.Log("{0}: Device denied the connection attempt: {1}", HostEndPoint, ex);
|
|
}
|
|
finally
|
|
{
|
|
if (response != null)
|
|
response.Close();
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Overridden.
|
|
/// </summary>
|
|
/// <returns></returns>
|
|
public override string ToString( )
|
|
{
|
|
//GetExternalIP is blocking and can throw exceptions, can't use it here.
|
|
return String.Format(
|
|
"UpnpNatDevice - EndPoint: {0}, External IP: {1}, Control Url: {2}, Service Description Url: {3}, Service Type: {4}, Last Seen: {5}",
|
|
this.hostEndPoint, "Manually Check" /*this.GetExternalIP()*/, this.controlUrl, this.serviceDescriptionUrl, this.serviceType, this.LastSeen);
|
|
}
|
|
}
|
|
} |