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  1. #1
    Join Date
    Jun 2010

    Message broadcasting over internet


    I'm screwed up in a problem from last 2 days. Can any one come up with a solution for me?
    My problem is

    I have a server application which has to boadcast messages over internet. My client program need to trace those messages. Its only one way.

    Currently i'm using below code at server to broad cast
    void brodcast()
    Socket sock = new Socket(AddressFamily.Unspecified, SocketType.Dgram,
    IPEndPoint iep1 = new IPEndPoint(IPAddress.Broadcast, 9050);
    string hostname = Dns.GetHostName();
    byte[] data = Encoding.ASCII.GetBytes(hostname);
    SocketOptionName.Broadcast, 1);
    sock.SendTo(data, iep1);

    Below code at client
    void listenTobroadcast()
    string mcastGroup = "";
    string port = "5000";
    Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

    IPEndPoint ipep = new IPEndPoint(IPAddress.Any, int.Parse(port));

    s.SetSocketOption(SocketOptionLevel.Udp, SocketOptionName.NoDelay, 1);

    s.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, 1);


    s.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive, 0);

    IPAddress ip = IPAddress.Parse(mcastGroup);

    s.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, IPAddress.Broadcast);

    while (true)
    byte[] b = new byte[5000];
    Console.WriteLine("Waiting for data..");
    string str = System.Text.Encoding.ASCII.GetString(b, 0, b.Length);
    Console.WriteLine(str.Replace('\0', ' ').Trim());


    application work fine within the network. But i wanted this to work over internet any system running client application need to receive the message.

    Advanced thanks for help. Waiting for early reply

  2. #2

    Re: Message broadcasting over internet

    UDP Multicasting must be enabled on every single router that the messages are trying to cross, which makes UDP multicasting pretty much useless except for Peer Networks.

  3. #3
    Join Date
    Jun 2010

    Re: Message broadcasting over internet

    Hi Matthew

    Thank you for your reply.

    So you think i can't complete my requirement. Can you suggest me any other way to do the things
    Last edited by nmkishan22; June 24th, 2010 at 04:14 AM.

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