84 lines
3.4 KiB
C#
84 lines
3.4 KiB
C#
//
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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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// Nicholas Terry <nick.i.terry@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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// Copyright (C) 2014 Nicholas Terry
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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.Collections.Generic;
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using System.Linq;
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using System.Net;
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using System.Text;
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namespace Mono.Nat.Upnp
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{
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internal class Upnp
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{
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public UpnpNatDevice Handle(IPAddress localAddress, byte[] response, IPEndPoint endpoint)
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{
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// Convert it to a string for easy parsing
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string dataString = null;
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string urn;
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dataString = Encoding.UTF8.GetString(response);
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if (NatUtility.Verbose)
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NatUtility.Log("UPnP Response: {0}", dataString);
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/* For UPnP Port Mapping we need ot find either WANPPPConnection or WANIPConnection.
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Any other device type is no good to us for this purpose. See the IGP overview paper
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page 5 for an overview of device types and their hierarchy.
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http://upnp.org/specs/gw/UPnP-gw-InternetGatewayDevice-v1-Device.pdf */
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/* TODO: Currently we are assuming version 1 of the protocol. We should figure out which
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version it is and apply the correct URN. */
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/* Some routers don't correctly implement the version ID on the URN, so we only search for the type
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prefix. */
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string log = "UPnP Response: Router advertised a '{0}' service";
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StringComparison c = StringComparison.OrdinalIgnoreCase;
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if (dataString.IndexOf("urn:schemas-upnp-org:service:WANIPConnection:", c) != -1)
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{
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urn = "urn:schemas-upnp-org:service:WANIPConnection:1";
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NatUtility.Log(log, "urn:schemas-upnp-org:service:WANIPConnection:1");
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}
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else if (dataString.IndexOf("urn:schemas-upnp-org:service:WANPPPConnection:", c) != -1)
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{
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urn = "urn:schemas-upnp-org:service:WANPPPConnection:1";
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NatUtility.Log(log, "urn:schemas-upnp-org:service:WANPPPConnection:");
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}
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else
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throw new NotSupportedException("Received non-supported device type");
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// We have an internet gateway device now
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return new UpnpNatDevice(localAddress, dataString, urn);
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}
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}
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}
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