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SocketPermission.IsUnrestricted Method

Checks the overall permission state of the object.

Namespace:  System.Net
Assembly:  System (in System.dll)

public bool IsUnrestricted()

Return Value

Type: System.Boolean
true if the SocketPermission instance is created with the Unrestricted value from PermissionState; otherwise, false.

Implements

IUnrestrictedPermission.IsUnrestricted()

The following example checks the IsUnrestricted property to determine if the specified SocketPermission has any restrictions.

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Collections;
using System.Security;
using System.Security.Permissions;

public class DateClient {

	private Socket serverSocket;
	private Encoding asciiEncoding; 
	private IPAddress serverAddress;

	private int serverPort;

	// The constructor takes the address and port of the remote server. 
	public DateClient(IPAddress serverIpAddress, int port) {
		serverAddress = serverIpAddress;
		serverPort = port;
		serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
		asciiEncoding = Encoding.ASCII;
	}

	// Print a security element and all its children, in a depth-first manner. 
	private void PrintSecurityElement(SecurityElement securityElementObj, int depth) {

		Console.WriteLine("Depth    : {0}", depth);
		Console.WriteLine("Tag      : {0}", securityElementObj.Tag);
		Console.WriteLine("Text     : {0}", securityElementObj.Text);
		if(securityElementObj.Children != null)
			Console.WriteLine("Children : {0}", securityElementObj.Children.Count);

		if(securityElementObj.Attributes != null) {
			IEnumerator attributeEnumerator = securityElementObj.Attributes.GetEnumerator();
			while(attributeEnumerator.MoveNext())
			Console.WriteLine("Attribute - \"{0}\" , Value - \"{1}\"", ((IDictionaryEnumerator)attributeEnumerator).Key, 
																	((IDictionaryEnumerator)attributeEnumerator).Value); 
		}

		Console.WriteLine("");

		if(securityElementObj.Children != null) {
			depth += 1;
			for(int i = 0; i < securityElementObj.Children.Count; i++) 
				PrintSecurityElement((SecurityElement)(securityElementObj.Children[i]), depth);
		}
	}

	public String GetDate() 
	{

		SocketPermission socketPermission1 = new SocketPermission(PermissionState.Unrestricted);

		// Create a 'SocketPermission' object for two ip addresses.
		SocketPermission socketPermission2 = new SocketPermission(PermissionState.None);
		SecurityElement securityElement4 = socketPermission2.ToXml();
      // 'SocketPermission' object for 'Connect' permission
		SecurityElement securityElement1 = new SecurityElement("ConnectAccess");
      // Format to specify ip address are <ip-address>#<port>#<transport-type> 
		// First 'SocketPermission' ip-address is '192.168.144.238' for 'All' transport types and for 'All' ports for the ip-address.
		SecurityElement securityElement2 = new SecurityElement("URI", "192.168.144.238#-1#3");
      // Second 'SocketPermission' ip-address is '192.168.144.240' for 'All' transport types and for 'All' ports for the ip-address.
		SecurityElement securityElement3 = new SecurityElement("URI", "192.168.144.240#-1#3");
		securityElement1.AddChild(securityElement2);
		securityElement1.AddChild(securityElement3);
		securityElement4.AddChild(securityElement1);
		
	   // Obtain a 'SocketPermission' object using 'FromXml' method.	
		socketPermission2.FromXml(securityElement4);

		// Create another 'SocketPermission' object with two ip addresses. 
      // First 'SocketPermission' ip-address is '192.168.144.238' for 'All' transport types and for 'All' ports for the ip-address.
		SocketPermission socketPermission3 = 
						new SocketPermission(NetworkAccess.Connect,
											 TransportType.All,
											 "192.168.144.238",
											 SocketPermission.AllPorts);

      // Second 'SocketPermission' ip-address is '192.168.144.239' for 'All' transport types and for 'All' ports for the ip-address.
		socketPermission3.AddPermission(NetworkAccess.Connect,
									   TransportType.All,
									   "192.168.144.239",
									   SocketPermission.AllPorts);

		Console.WriteLine("\nChecks the Socket permissions using IsUnrestricted method : ");
		if(socketPermission1.IsUnrestricted())
			Console.WriteLine("Socket permission is unrestricted");
		else
			Console.WriteLine("Socket permission is restricted");

		Console.WriteLine();

		Console.WriteLine("Display result of ConnectList property : \n");
		IEnumerator enumerator = socketPermission3.ConnectList;
		while(enumerator.MoveNext()) {
			Console.WriteLine("The hostname is       : {0}", ((EndpointPermission)enumerator.Current).Hostname);
			Console.WriteLine("The port is           : {0}", ((EndpointPermission)enumerator.Current).Port);
			Console.WriteLine("The Transport type is : {0}", ((EndpointPermission)enumerator.Current).Transport);
		}
		Console.WriteLine("");

		Console.WriteLine("Display Security Elements :\n ");
		PrintSecurityElement(socketPermission2.ToXml(), 0);

		// Get a 'SocketPermission' object which is a union of two other 'SocketPermission' objects.
		socketPermission1 = (SocketPermission)socketPermission3.Union(socketPermission2);

		// Demand that the calling method have the socket permission.
		socketPermission1.Demand();

		// Get the current date from the remote date server. 
		try {
			int bytesReceived;		
			byte[] getByte = new byte[100];
			serverSocket.Connect(new IPEndPoint( serverAddress, serverPort));
			bytesReceived = serverSocket.Receive( getByte, getByte.Length, 0 );
			return asciiEncoding.GetString( getByte, 0, bytesReceived );
		}
		catch(Exception e)
		{
			Console.WriteLine("\nException raised : {0}", e.Message);
			return "";
		}
	}
};
SocketPermission* socketPermission1 = new SocketPermission(PermissionState::Unrestricted);

// Create a 'SocketPermission' Object* for two ip addresses.
SocketPermission* socketPermission2 = new SocketPermission(PermissionState::None);
SecurityElement*  securityElement4 = socketPermission2->ToXml();
// 'SocketPermission' Object* for 'Connect' permission
SecurityElement* securityElement1 = new SecurityElement(S"ConnectAccess");
// Format to specify ip address are <ip-address>#<port>#<transport-type>
// First 'SocketPermission' ip-address is '192.168.144.238' for 'All' transport types and for 'All' ports for the ip-address.
SecurityElement* securityElement2 = new SecurityElement(S"URI", S"192.168.144.238#-1#3");
// Second 'SocketPermission' ip-address is '192.168.144.240' for 'All' transport types and for 'All' ports for the ip-address.
SecurityElement* securityElement3 = new SecurityElement(S"URI", S"192.168.144.240#-1#3");
securityElement1->AddChild(securityElement2);
securityElement1->AddChild(securityElement3);
securityElement4->AddChild(securityElement1);

// Obtain a 'SocketPermission' Object* using 'FromXml' method.
socketPermission2->FromXml(securityElement4);

// Create another 'SocketPermission' Object* with two ip addresses.
// First 'SocketPermission' ip-address is '192.168.144.238' for 'All' transport types and for 'All' ports for the ip-address.
SocketPermission* socketPermission3 = new SocketPermission(NetworkAccess::Connect,
   TransportType::All,
   S"192.168.144.238",
   SocketPermission::AllPorts);

// Second 'SocketPermission' ip-address is '192.168.144.239' for 'All' transport types and for 'All' ports for the ip-address.
socketPermission3->AddPermission(NetworkAccess::Connect,
   TransportType::All,
   S"192.168.144.239",
   SocketPermission::AllPorts);

Console::WriteLine(S"\nChecks the Socket permissions using IsUnrestricted method : ");
if (socketPermission1->IsUnrestricted())
   Console::WriteLine(S"Socket permission is unrestricted");
else
   Console::WriteLine(S"Socket permission is restricted");

Console::WriteLine();

Console::WriteLine(S"Display result of ConnectList property : \n");
IEnumerator* enumerator = socketPermission3->ConnectList;
while(enumerator->MoveNext())
{
   Console::WriteLine(S"The hostname is       : {0}", dynamic_cast<EndpointPermission*>(enumerator->Current)->Hostname);
   Console::WriteLine(S"The port is           : {0}",__box( dynamic_cast<EndpointPermission*>(enumerator->Current)->Port));
   Console::WriteLine(S"The Transport type is : {0}",__box( dynamic_cast<EndpointPermission*>(enumerator->Current)->Transport));
}
Console::WriteLine(S"");

Console::WriteLine(S"Display Security Elements :\n ");
PrintSecurityElement(socketPermission2->ToXml(), 0);

// Get a 'SocketPermission' Object* which is a union of two other 'SocketPermission' objects.
socketPermission1 = dynamic_cast<SocketPermission*>(socketPermission3->Union(socketPermission2));

// Demand that the calling method have the socket permission.
socketPermission1->Demand();

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

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