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