Controlling Windows Firewall in C# for Windows 7 and Xp Sp3
I here have a code working perfect in Windows 7 i took help from this post....
The problem comes when that same code in compiled on Win Xp Sp3 PC. Its does not comile... says interface missing (error) ....
I cant seem to figure out. I have added reference again to hnetcfg.dll (COM APi reference) for windows xp (in windows 7 i have to add nother dll "FirewallAPi.dll") to project
using NATUPNPLib;
using NETCONLib;
using NetFwTypeLib;
But still the interfaces and other classes are not visible to VS
pardon for posting the whole code
Classes
Firewall manager
using System;
using System.Collections;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using NATUPNPLib;
using NETCONLib;
using NetFwTypeLib;
namespace WindowsFirewallManager
{
/// Allows basic access to the windows firewall API.
/// This can be used to add an exception to the windows firewall
/// exceptions list
public class FirewallHelper
{
#region Variables
/// Hooray! Singleton access.
private static FirewallHelper instance;
/// Interface to the firewall manager COM object
private INetFwMgr fireWallManager = null;
#endregion
#region Properties
/// Singleton access to the firewallhelper object.
/// Threadsafe.
public static FirewallHelper Instance
{
get
{
lock (typeof (FirewallHelper))
{
return instance ?? (instance = new FirewallHelper());
}
}
}
#endregion
#region Constructivat0r
/// Private Constructor.
/// If this fails, HasFirewall will return false
private FirewallHelper()
{
// Get the type of HNetCfg.FwMgr, or null if an error occurred
Type fwMgrType = Type.GetTypeFromProgID("HNetCfg.FwMgr", false);
// Assume failed.
fireWallManager = null;
if (fwMgrType != null)
{
try
{
fireWallManager =
(INetFwMgr) Activator.CreateInstance(fwMgrType);
}
// In all other circumnstances, fireWallManager is null.
catch (ArgumentException)
{
}
catch (NotSupportedException)
{
}
catch (TargetInvocationException)
{
}
catch (MissingMethodException)
{
}
catch (MethodAccessException)
{
}
catch (MemberAccessException)
{
}
catch (InvalidComObjectException)
{
}
catch (COMException)
{
}
catch (TypeLoadException)
{
}
}
}
#endregion
#region Helper Methods
/// Gets whether or not the firewall is installed on this computer.
public bool IsFirewallInstalled
{
get
{
return fireWallManager != null &&
fireWallManager.LocalPolicy != null &&
fireWallManager.LocalPolicy.CurrentProfile != null;
}
}
/// Returns whether or not the firewall is enabled.
/// If the firewall is not installed, this returns false.
public bool IsFirewallEnabled
{
get
{
return IsFirewallInstalled &&
fireWallManager.LocalPolicy.CurrentProfile.
FirewallEnabled;
}
}
/// Returns whether or not the firewall allows Application "Exceptions".
/// If the firewall is not installed, this returns false.
///
///
/// Added to allow access to this method
public bool AppAuthorizationsAllowed
{
get
{
return IsFirewallInstalled &&
!fireWallManager.LocalPolicy.CurrentProfile.
ExceptionsNotAllowed;
}
}
/// Adds an application to the list of authorized applications.
/// If the application is already authorized, does nothing.
///
///
/// The full path to the application executable. This cannot
/// be blank, and cannot be a relative path.
///
///
/// This is the name of the application, purely for display
/// puposes in the Microsoft Security Center.
///
///
/// When applicationFullPath is null OR
/// When appName is null.
///
///
/// When applicationFullPath is blank OR
/// When appName is blank OR
/// applicationFullPath contains invalid path characters OR
/// applicationFullPath is not an absolute path
///
///
/// If the firewall is not installed OR
/// If the firewall does not allow specific application 'exceptions' OR
/// Due to an exception in COM this method could not create the
/// necessary COM types
///
///
/// If no file exists at the given applicationFullPath
public void GrantAuthorization(string applicationFullPath,
string appName,
NET_FW_SCOPE_ scope,
NET_FW_IP_VERSION_ ipVersion)
{
#region Parameter checking
if (applicationFullPath == null)
throw new ArgumentNullException("applicationFullPath");
if (appName == null)
throw new ArgumentNullException("appName");
if (applicationFullPath.Trim().Length == 0)
throw new ArgumentException(
"applicationFullPath must not be blank");
if (applicationFullPath.Trim().Length == 0)
throw new ArgumentException("appName must not be blank");
if (applicationFullPath.IndexOfAny(Path.InvalidPathChars) >= 0)
throw new ArgumentException(
"applicationFullPath must not contain invalid path characters");
if (!Path.IsPathRooted(applicationFullPath))
throw new ArgumentException(
"applicationFullPath is not an absolute path");
if (!File.Exists(applicationFullPath))
throw new FileNotFoundException("File does not exist",
applicationFullPath);
// State checking
if (!IsFirewallInstalled)
throw new FirewallHelperException(
"Cannot grant authorization: Firewall is not installed.");
if (!AppAuthorizationsAllowed)
throw new FirewallHelperException(
"Application exemptions are not allowed.");
#endregion
if (!HasAuthorization(applicationFullPath))
{
// Get the type of HNetCfg.FwMgr, or null if an error occurred
Type authAppType =
Type.GetTypeFromProgID("HNetCfg.FwAuthorizedApplication",
false);
// Assume failed.
INetFwAuthorizedApplication appInfo = null;
if (authAppType != null)
{
try
{
appInfo =
(INetFwAuthorizedApplication)
Activator.CreateInstance(authAppType);
}
// In all other circumnstances, appInfo is null.
catch (ArgumentException)
{
}
catch (NotSupportedException)
{
}
catch (TargetInvocationException)
{
}
catch (MissingMethodException)
{
}
catch (MethodAccessException)
{
}
catch (MemberAccessException)
{
}
catch (InvalidComObjectException)
{
}
catch (COMException)
{
}
catch (TypeLoadException)
{
}
}
if (appInfo == null)
throw new FirewallHelperException(
"Could not grant authorization: can't create INetFwAuthorizedApplication instance.");
appInfo.Name = appName;
appInfo.ProcessImageFileName = applicationFullPath;
appInfo.Scope = scope;
appInfo.IpVersion = ipVersion;
appInfo.Enabled = true;
// ...
// Use defaults for other properties of the AuthorizedApplication COM object
// Authorize this application
fireWallManager.LocalPolicy.CurrentProfile.
AuthorizedApplications.Add(appInfo);
}
// otherwise it already has authorization so do nothing
}
/// Removes an application to the list of authorized applications.
/// Note that the specified application must exist or a FileNotFound
/// exception will be thrown.
/// If the specified application exists but does not current have
/// authorization, this method will do nothing.
///
///
/// The full path to the application executable. This cannot
/// be blank, and cannot be a relative path.
///
///
/// When applicationFullPath is null
///
///
/// When applicationFullPath is blank OR
/// applicationFullPath contains invalid path characters OR
/// applicationFullPath is not an absolute path
///
///
/// If the firewall is not installed.
///
///
/// If the specified application does not exist.
public void RemoveAuthorization(string applicationFullPath)
{
#region Parameter checking
if (applicationFullPath == null)
throw new ArgumentNullException("applicationFullPath");
if (applicationFullPath.Trim().Length == 0)
throw new ArgumentException(
"applicationFullPath must not be blank");
if (applicationFullPath.IndexOfAny(Path.InvalidPathChars) >= 0)
throw new ArgumentException(
"applicationFullPath must not contain invalid path characters");
if (!Path.IsPathRooted(applicationFullPath))
throw new ArgumentException(
"applicationFullPath is not an absolute path");
if (!File.Exists(applicationFullPath))
throw new FileNotFoundException("File does not exist",
applicationFullPath);
// State checking
if (!IsFirewallInstalled)
throw new FirewallHelperException(
"Cannot remove authorization: Firewall is not installed.");
#endregion
if (HasAuthorization(applicationFullPath))
{
// Remove Authorization for this application
fireWallManager.LocalPolicy.CurrentProfile.
AuthorizedApplications.Remove(applicationFullPath);
}
// otherwise it does not have authorization so do nothing
}
/// Returns whether an application is in the list of authorized applications.
/// Note if the file does not exist, this throws a FileNotFound exception.
///
///
/// The full path to the application executable. This cannot
/// be blank, and cannot be a relative path.
///
///
/// The full path to the application executable. This cannot
/// be blank, and cannot be a relative path.
///
///
/// When applicationFullPath is null
///
///
/// When applicationFullPath is blank OR
/// applicationFullPath contains invalid path characters OR
/// applicationFullPath is not an absolute path
///
///
/// If the firewall is not installed.
///
///
/// If the specified application does not exist.
public bool HasAuthorization(string applicationFullPath)
{
#region Parameter checking
if (applicationFullPath == null)
throw new ArgumentNullException("applicationFullPath");
if (applicationFullPath.Trim().Length == 0)
throw new ArgumentException(
"applicationFullPath must not be blank");
if (applicationFullPath.IndexOfAny(Path.InvalidPathChars) >= 0)
throw new ArgumentException(
"applicationFullPath must not contain invalid path characters");
if (!Path.IsPathRooted(applicationFullPath))
throw new ArgumentException(
"applicationFullPath is not an absolute path");
if (!File.Exists(applicationFullPath))
throw new FileNotFoundException("File does not exist.",
applicationFullPath);
// State checking
if (!IsFirewallInstalled)
throw new FirewallHelperException(
"Cannot remove authorization: Firewall is not installed.");
#endregion
// Locate Authorization for this application
return
GetAuthorizedAppPaths().Cast<string>().Any(
appName =>
appName.ToLower() == applicationFullPath.ToLower());
// Failed to locate the given app.
}
/// Retrieves a collection of paths to applications that are authorized.
///
///
///
/// If the Firewall is not installed.
public ICollection GetAuthorizedAppPaths()
{
// State checking
if (!IsFirewallInstalled)
throw new FirewallHelperException(
"Cannot remove authorization: Firewall is not installed.");
ArrayList list = new ArrayList();
// Collect the paths of all authorized applications
foreach (
INetFwAuthorizedApplication app in
fireWallManager.LocalPolicy.CurrentProfile.
AuthorizedApplications)
list.Add(app.ProcessImageFileName);
return list;
}
#endregion
}
}
Exception
using System;
namespace WindowsFirewallManager
{
///
/// Describes a FirewallHelperException.
///
public class FirewallHelperException : Exception
{
///
/// Construct a new FirewallHelperException
///
///
public FirewallHelperException(string message)
: base(message)
{ }
}
}
How can i make the FirewallManager Compatibel with both OS Versions or anyother way if possible
thanks for the help....
Answer
It is explicitly mentioned in the Remarks section of the MSDN article for INetFwMgr:
Windows Vista: Windows Vista users must use applications developed in Windows Vista for all methods and properties of this interface.
Which is a somewhat crummy way to say that the INetFwMgr interface implementation was replaced in Vista. It got a new IID so if you built your program on a machine that runs Vista or higher then your program will fall over on XP. You'll need to create a special build of your program for XP users. You'll need to do so by using the type library that's embedded in the XP version of c:\windows\system32\firewallapi.dll. Get the interop library by running tlbimp.exe on that DLL. Having a machine or VM that boots XP will of course be a good way to get a copy of that DLL and to test your build.