Click here to Skip to main content
Click here to Skip to main content
Articles » Languages » C# » General » Downloads
 
Add your own
alternative version

Using OpenTK/OpenAL to Develop Cross Platform DIS VOIP Application

, 15 Mar 2010
Application allows voice communications (VOIP) utilizing the Distributed Interactive Simulation protocol (IEEE 1278.1)
MonoDISRadioTransmitter_SourceCode.zip
MonoDISRadioTransmitter
AudioIN
bin
Properties
StyleCop.Cache
AudioOUT
bin
Properties
DISNET
bin
DataStreams
DISPDU
Enumerations
Properties
Utilities
OpenDISRadioTransmitterExample
AudioCodecs
bin
OpenDISRadioTransmitter.csproj.user
OpenTK
OpenTK.Compatibility.dll
OpenTK.dll
OpenTK.GLControl.dll
Properties
Settings.settings
StyleCop.Cache
OpenDISRadioTransmitterSolution.suo
RadioFeatureSelection
bin
Properties
Sockets
bin
Properties
// Copyright (c) 2010, Peter Smith
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, 
// are permitted provided that the following conditions are met:
//
// Redistributions of source code must retain the above copyright notice, this list 
// of conditions and the following disclaimer. 
//
// Redistributions in binary form must reproduce the above copyright notice, this 
// list of conditions and the following disclaimer in the documentation and/or 
// other materials provided with the distribution. 
//
// Neither the name of the  Author nor the names of its contributors may be used to 
// endorse or promote products derived from this software without specific prior 
// written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
// IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 
// OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 
// OF THE POSSIBILITY OF SUCH DAMAGE.

namespace SocketCommunications
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Net;
    using System.Net.Sockets;
    using System.Text;
    using System.Threading;
    using System.Net.NetworkInformation;

    public static class SocketHelper
    {
        #region Fields

        // Signals when the resolve has finished.
        private static ManualResetEvent GetHostEntryFinished = new ManualResetEvent(false);
        static IPHostEntry resolvedIPs;

        private static List<IPAddressInfo> ipAddressesAvailable = null;
        #endregion Fields

        #region Methods

        // Determine the Internet Protocol (IP) addresses for
        // this host asynchronously.
        private static void DoGetHostEntryAsync(string hostname)
        {
            GetHostEntryFinished.Reset();
            //BroadCastSend ioContext = null;

            IPStateObject ioContext = null;

            try
            {
                ioContext = new IPStateObject();
                ioContext.host = hostname;

                Dns.BeginGetHostEntry(ioContext.host, new AsyncCallback(GetHostEntryCallback), ioContext);

                // Wait here until the resolve completes (the callback calls .Set())
                GetHostEntryFinished.WaitOne();

                resolvedIPs = ioContext.ipHostEntry;
            }
            catch (Exception ex)
            {
                string error = ex.ToString();
            }

            foreach (IPAddress ip in ioContext.ipHostEntry.AddressList)
            {
                IPAddressInfo ipAddressInfo = new IPAddressInfo();
                ipAddressInfo.IPAddress = ip;
                ipAddressInfo.SubNetMask = null;
                ipAddressInfo.BroadCastAddress = CalculateBroadCastAddress(ip, null);

                ipAddressesAvailable.Add(ipAddressInfo);
            }
        }

        // Record the IPs in the state object for later use.
        private static void GetHostEntryCallback(IAsyncResult ar)
        {
            //BroadCastSend ioContext = (BroadCastSend)ar.AsyncState;

            IPStateObject ioContext = (IPStateObject)ar.AsyncState;

            //ioContext.IPs = Dns.EndGetHostEntry(ar);
            ioContext.ipHostEntry = Dns.EndGetHostEntry(ar);
            GetHostEntryFinished.Set();
        }

        private static void GetIPNetworkInformation(bool Include_IPV4, bool Include_IPV6)
        {
            foreach (NetworkInterface networkInterface in NetworkInterface.GetAllNetworkInterfaces())
                if (networkInterface.OperationalStatus == OperationalStatus.Up)
                {
                    IPInterfaceProperties ipInterface = networkInterface.GetIPProperties();
                    foreach (UnicastIPAddressInformation unicastAddress in ipInterface.UnicastAddresses)
                    {
                        IPAddressInfo ipAddressInfo = new IPAddressInfo();
                        switch (unicastAddress.Address.AddressFamily)
                        {
                            case AddressFamily.InterNetwork:
                                if (Include_IPV4)
                                {
                                    ipAddressInfo.IPAddress = unicastAddress.Address;
                                    ipAddressInfo.SubNetMask = unicastAddress.IPv4Mask;
                                    ipAddressInfo.BroadCastAddress = CalculateBroadCastAddress(unicastAddress.Address, unicastAddress.IPv4Mask);
                                }
                                break;
                            case AddressFamily.InterNetworkV6:
                                if (Include_IPV6)
                                {
                                    ipAddressInfo.IPAddress = unicastAddress.Address;
                                    ipAddressInfo.SubNetMask = null;
                                    ipAddressInfo.BroadCastAddress = null;
                                }
                                break;
                            default:
                                break;
                        }

                        if (ipAddressInfo.IPAddress != null)
                            ipAddressesAvailable.Add(ipAddressInfo);
                    }
                }   
        }

        public static IPAddress CalculateBroadCastAddress(IPAddress ipAddress, IPAddress ipNetMask)
        {
            if (ipNetMask == null)
            {
                return CalculateClassABC_BroadCastAddress(ipAddress);
            }

            string[] strCurrentIP = ipAddress.ToString().Split('.');
            string[] strIPNetMask = ipNetMask.ToString().Split('.');

            int[] arBroadCast = new int[4];

            for (int i = 0; i < 4; i++)
            {
                int nrBCOct = int.Parse(strCurrentIP[i]) | (int.Parse(strIPNetMask[i]) ^ 255);
                arBroadCast[i] = nrBCOct;
            }
            return IPAddress.Parse(arBroadCast[0] + "." + arBroadCast[1] + "." + arBroadCast[2] + "." + arBroadCast[3]);
        }

        private static IPAddress CalculateClassABC_BroadCastAddress(IPAddress ipAddress)
        {
            string[] octets = ipAddress.ToString().Split('.');
            byte b = byte.Parse(octets[0]);

            //Class C or above
            if (b >= 192)
                return IPAddress.Parse(octets[0] + "." + octets[1] + "." + octets[2]  + ".255");

            //Class B
            if (b >= 128)
                return IPAddress.Parse(octets[0] + "." + octets[1] + ".255.255");
            //Class A (== 0)
            return IPAddress.Parse(octets[0] + ".255.255.255");
        }

        public static List<IPAddressInfo> IPAddressesAvailable
        {
            get
            {
                if (ipAddressesAvailable == null)
                {
                    //GetIPNetworkInformation is not implemented completely on Mono therefore this
                    //workaround.  This will not figure out broadcast based upon subnet
                    Type t = Type.GetType("Mono.Runtime");

                    ipAddressesAvailable = new List<IPAddressInfo>();

                    if (t != null)
                    {

                        DoGetHostEntryAsync(Dns.GetHostName());
                    }
                    else
                    {
                        GetIPNetworkInformation(true, false);
                    }
                }

                return ipAddressesAvailable;
            }
        }

        #endregion Methods

        #region Nested Types

        public class IPStateObject
        {
            #region Fields

            public string host;
            public IPHostEntry ipHostEntry;

            #endregion Fields
        }

        #endregion Nested Types
    }
}

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

This article, along with any associated source code and files, is licensed under The BSD License

Share

About the Author

pesmith
Software Developer
United States United States
No Biography provided

| Advertise | Privacy | Mobile
Web04 | 2.8.140821.2 | Last Updated 15 Mar 2010
Article Copyright 2010 by pesmith
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid