1 files changed, 83 insertions, 0 deletions
diff --git a/Mono.Nat/Upnp/Upnp.cs b/Mono.Nat/Upnp/Upnp.cs
new file mode 100644
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+++ b/Mono.Nat/Upnp/Upnp.cs
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+//
+// 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.Linq;
+using System.Net;
+using System.Text;
+
+namespace Mono.Nat.Upnp
+{
+    internal class Upnp
+    {
+        public UpnpNatDevice Handle(IPAddress localAddress, byte[] response, IPEndPoint endpoint)
+        {
+            // Convert it to a string for easy parsing
+            string dataString = null;
+
+
+            string urn;
+            dataString = Encoding.UTF8.GetString(response);
+
+            if (NatUtility.Verbose)
+                NatUtility.Log("UPnP Response: {0}", dataString);
+
+            /* For UPnP Port Mapping we need ot find either WANPPPConnection or WANIPConnection. 
+                Any other device type is no good to us for this purpose. See the IGP overview paper 
+                page 5 for an overview of device types and their hierarchy.
+                http://upnp.org/specs/gw/UPnP-gw-InternetGatewayDevice-v1-Device.pdf */
+
+            /* TODO: Currently we are assuming version 1 of the protocol. We should figure out which
+                version it is and apply the correct URN. */
+
+            /* Some routers don't correctly implement the version ID on the URN, so we only search for the type
+                prefix. */
+
+            string log = "UPnP Response: Router advertised a '{0}' service";
+            StringComparison c = StringComparison.OrdinalIgnoreCase;
+            if (dataString.IndexOf("urn:schemas-upnp-org:service:WANIPConnection:", c) != -1)
+            {
+                urn = "urn:schemas-upnp-org:service:WANIPConnection:1";
+                NatUtility.Log(log, "urn:schemas-upnp-org:service:WANIPConnection:1");
+            }
+            else if (dataString.IndexOf("urn:schemas-upnp-org:service:WANPPPConnection:", c) != -1)
+            {
+                urn = "urn:schemas-upnp-org:service:WANPPPConnection:1";
+                NatUtility.Log(log, "urn:schemas-upnp-org:service:WANPPPConnection:");
+            }
+            else
+                throw new NotSupportedException("Received non-supported device type");
+
+            // We have an internet gateway device now
+            return new UpnpNatDevice(localAddress, dataString, urn);
+        }
+    }
+}