/*
    Myrtille: A native HTML4/5 Remote Desktop Protocol client.

    Copyright(c) 2014-2021 Cedric Coste

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

using System;
using System.Diagnostics;
using NetFwTypeLib;

namespace Myrtille.Helpers
{
    public static class FirewallHelper
    {
        public static void OpenFirewallPort(int port, string description)
        {
            try
            {
                // firewall manager
                var TicfMgr = Type.GetTypeFromProgID("HNetCfg.FwMgr");
                var icfMgr = (INetFwMgr)Activator.CreateInstance(TicfMgr);

                // open port
                var TportClass = Type.GetTypeFromProgID("HNetCfg.FWOpenPort");
                var portClass = (INetFwOpenPort)Activator.CreateInstance(TportClass);

                // current profile
                var profile = icfMgr.LocalPolicy.CurrentProfile;

                // set properties
                portClass.Scope = NET_FW_SCOPE_.NET_FW_SCOPE_ALL;
                portClass.Protocol = NET_FW_IP_PROTOCOL_.NET_FW_IP_PROTOCOL_TCP;
                portClass.Port = port;
                portClass.Name = description;
                portClass.Enabled = true;

                // add the port to the ICF permissions list
                profile.GloballyOpenPorts.Add(portClass);
            }
            catch (Exception exc)
            {
                Trace.TraceError("Failed to open firewall port ({0})", exc);
            }
        }

        public static void CloseFirewallPort(int port)
        {
            try
            {
                // firewall manager
                var TicfMgr = Type.GetTypeFromProgID("HNetCfg.FwMgr");
                var icfMgr = (INetFwMgr)Activator.CreateInstance(TicfMgr);

                // current profile
                var profile = icfMgr.LocalPolicy.CurrentProfile;

                // add the port to the ICF permissions list
                profile.GloballyOpenPorts.Remove(port, NET_FW_IP_PROTOCOL_.NET_FW_IP_PROTOCOL_TCP);
            }
            catch (Exception exc)
            {
                Trace.TraceError("Failed to remove firewall port ({0})", exc);
            }
        }
    }
}