133 lines
5.4 KiB
C#
133 lines
5.4 KiB
C#
//
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// Authors:
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// Alan McGovern alan.mcgovern@gmail.com
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//
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// Copyright (C) 2006 Alan McGovern
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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.Diagnostics;
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using System.Xml;
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using System.Net;
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using System.IO;
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using System.Text;
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using System.Globalization;
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namespace Mono.Nat.Upnp
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{
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internal abstract class MessageBase
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{
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internal static readonly CultureInfo Culture = CultureInfo.InvariantCulture;
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protected UpnpNatDevice device;
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protected MessageBase(UpnpNatDevice device)
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{
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this.device = device;
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}
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protected WebRequest CreateRequest(string upnpMethod, string methodParameters, out byte[] body)
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{
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string ss = "http://" + this.device.HostEndPoint.ToString() + this.device.ControlUrl;
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NatUtility.Log("Initiating request to: {0}", ss);
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Uri location = new Uri(ss);
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HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(location);
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req.KeepAlive = false;
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req.Method = "POST";
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req.ContentType = "text/xml; charset=\"utf-8\"";
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req.Headers.Add("SOAPACTION", "\"" + device.ServiceType + "#" + upnpMethod + "\"");
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string bodyString = "<s:Envelope "
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+ "xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\" "
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+ "s:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">"
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+ "<s:Body>"
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+ "<u:" + upnpMethod + " "
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+ "xmlns:u=\"" + device.ServiceType + "\">"
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+ methodParameters
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+ "</u:" + upnpMethod + ">"
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+ "</s:Body>"
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+ "</s:Envelope>\r\n\r\n";
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body = System.Text.Encoding.UTF8.GetBytes(bodyString);
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return req;
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}
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public static MessageBase Decode(UpnpNatDevice device, string message)
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{
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XmlNode node;
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XmlDocument doc = new XmlDocument();
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doc.LoadXml(message);
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XmlNamespaceManager nsm = new XmlNamespaceManager(doc.NameTable);
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// Error messages should be found under this namespace
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nsm.AddNamespace("errorNs", "urn:schemas-upnp-org:control-1-0");
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nsm.AddNamespace("responseNs", device.ServiceType);
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// Check to see if we have a fault code message.
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if ((node = doc.SelectSingleNode("//errorNs:UPnPError", nsm)) != null) {
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string errorCode = node["errorCode"] != null ? node["errorCode"].InnerText : "";
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string errorDescription = node["errorDescription"] != null ? node["errorDescription"].InnerText : "";
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return new ErrorMessage(Convert.ToInt32(errorCode, CultureInfo.InvariantCulture), errorDescription);
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}
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if ((doc.SelectSingleNode("//responseNs:AddPortMappingResponse", nsm)) != null)
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return new CreatePortMappingResponseMessage();
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if ((doc.SelectSingleNode("//responseNs:DeletePortMappingResponse", nsm)) != null)
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return new DeletePortMapResponseMessage();
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if ((node = doc.SelectSingleNode("//responseNs:GetExternalIPAddressResponse", nsm)) != null) {
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string newExternalIPAddress = node["NewExternalIPAddress"] != null ? node["NewExternalIPAddress"].InnerText : "";
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return new GetExternalIPAddressResponseMessage(newExternalIPAddress);
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}
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if ((node = doc.SelectSingleNode("//responseNs:GetGenericPortMappingEntryResponse", nsm)) != null)
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return new GetGenericPortMappingEntryResponseMessage(node, true);
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if ((node = doc.SelectSingleNode("//responseNs:GetSpecificPortMappingEntryResponse", nsm)) != null)
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return new GetGenericPortMappingEntryResponseMessage(node, false);
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NatUtility.Log("Unknown message returned. Please send me back the following XML:");
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NatUtility.Log(message);
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return null;
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}
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public abstract WebRequest Encode(out byte[] body);
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internal static void WriteFullElement(XmlWriter writer, string element, string value)
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{
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writer.WriteStartElement(element);
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writer.WriteString(value);
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writer.WriteEndElement();
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}
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internal static XmlWriter CreateWriter(StringBuilder sb)
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{
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XmlWriterSettings settings = new XmlWriterSettings();
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settings.ConformanceLevel = ConformanceLevel.Fragment;
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return XmlWriter.Create(sb, settings);
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}
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}
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}
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