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//
// System.Net.SocketPermissionAttribute.cs
//
// Author:
// Lawrence Pit (loz@cable.a2000.nl)
//
using System;
using System.Security;
using System.Security.Permissions;
namespace System.Net
{
[AttributeUsage (AttributeTargets.Assembly
| AttributeTargets.Class
| AttributeTargets.Struct
| AttributeTargets.Constructor
| AttributeTargets.Method)
]
[Serializable]
public sealed class SocketPermissionAttribute : CodeAccessSecurityAttribute
{
// Fields
string m_access;
string m_host;
string m_port;
string m_transport;
// Constructors
public SocketPermissionAttribute (SecurityAction action) : base (action)
{
}
// Properties
public string Access {
get { return m_access; }
set {
if (m_access != null)
throw new ArgumentException ("The parameter 'Access' can be set only once.");
if (value == null)
throw new ArgumentException ("The parameter 'Access' cannot be null.");
m_access = value;
}
}
public string Host {
get { return m_host; }
set {
if (m_host != null)
throw new ArgumentException ("The parameter 'Host' can be set only once.");
if (value == null)
throw new ArgumentException ("The parameter 'Host' cannot be null.");
m_host = value;
}
}
public string Port {
get { return m_port; }
set {
if (m_port != null)
throw new ArgumentException ("The parameter 'Port' can be set only once.");
if (value == null)
throw new ArgumentException ("The parameter 'Port' cannot be null.");
m_port = value;
}
}
public string Transport {
get { return m_transport; }
set {
if (m_transport != null)
throw new ArgumentException ("The parameter 'Transport' can be set only once.");
if (value == null)
throw new ArgumentException ("The parameter 'Transport' cannot be null.");
m_transport = value;
}
}
// Methods
public override IPermission CreatePermission () {
if (this.Unrestricted)
return new SocketPermission (PermissionState.Unrestricted);
if (m_access == null)
throw new ArgumentException ("The value for 'Access' must be specified.");
if (m_host == null)
throw new ArgumentException ("The value for 'Host' must be specified.");
if (m_port == null)
throw new ArgumentException ("The value for 'Port' must be specified.");
if (m_transport == null)
throw new ArgumentException ("The value for 'Transport' must be specified.");
NetworkAccess access;
TransportType transport;
int port = SocketPermission.AllPorts;
if (String.Compare (m_access, "Connect", true) == 0)
access = NetworkAccess.Connect;
else if (String.Compare (m_access, "Accept", true) == 0)
access = NetworkAccess.Accept;
else
throw new ArgumentException ("The parameter value 'Access=" + m_access + "' is invalid.");
if (String.Compare (m_port, "All", true) != 0) {
try {
port = Int32.Parse (m_port);
} catch (Exception) {
throw new ArgumentException ("The parameter value 'Port=" + port + "' is invalid.");
}
// test whether port number is valid..
new IPEndPoint (1, port);
}
try {
transport = (TransportType) Enum.Parse (typeof (TransportType), m_transport, true);
} catch (Exception) {
throw new ArgumentException ("The parameter value 'Transport=" + m_transport + "' is invalid.");
}
SocketPermission perm = new SocketPermission (PermissionState.None);
perm.AddPermission (access, transport, m_host, port);
return perm;
}
}
}
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