C＃UDP服务器客户端未接收彼此的消息？

Question

因此，对于我的UDP C＃聊天应用程序，我有一个服务器程序，该程序旨在通过侦听客户端将其发送到端口8001上，当它从客户端接收ACKNOLWEDEND时，它应该将消息发送回到客户。但是，尽管客户端和服务器都说他们正在互相收听，但服务器始终立即报告它将消息发送到IP地址0.0.0.0，因此它们不链接，以下是client和Server的代码：服务器

： ：

const int listenPort = 8001;


    bool done = false;
UdpClient listener = new UdpClient(listenPort);


try
    {
    while (!done)
    {

string text_to_send = satt.Text;
    if (text_to_send.Length == 0)
    {
    done = true;
    }
    else
    {
    byte[] send_buffer = Encoding.ASCII.GetBytes(text_to_send);





try
{

string IPAddress1 = "";
IPHostEntry Host = default(IPHostEntry);
string Hostname = null;
Hostname = System.Environment.MachineName;
Host = Dns.GetHostEntry(Hostname);
foreach (IPAddress IP in Host.AddressList)
{
if (IP.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
IPAddress1 = Convert.ToString(IP);
}
else

{
IPEndPoint groupEP = new IPEndPoint(IPAddress.Any, listenPort);
string data_recieved;
byte[] recieve_byte_array;
try
{
while (!done)
{
Console.WriteLine("Looking for attack buddies " + groupEP);
recieve_byte_array = listener.Receive(ref groupEP);
Console.WriteLine("New buddy found at + " + groupEP.ToString());
data_recieved = Encoding.ASCII.GetString(recieve_byte_array, 0, recieve_byte_array.Length);
Console.WriteLine(data_recieved);
}
}

catch (Exception n)
                                    {
                                        Console.WriteLine("Attack information could not be sent. Please make sure your buddies are reachable" + n.ToString());
}
}
}
}
catch (Exception j)
{
Console.WriteLine("Please make sure all needed information is filled out");
}

客户端：

const int listenPort = 8001;


            bool done = false;
            UdpClient listener = new UdpClient(listenPort);
            IPEndPoint groupEP = new IPEndPoint(IPAddress.Any, listenPort);
            string data_recieved;
            string searchcount_sent = searchcount.ToString();
            byte[] send_byte_array;
            byte[] recieve_byte_array;
            try
            {
                while (!done)


                {
           string IPAddress1 = "";
           IPHostEntry Host = default(IPHostEntry);
           string Hostname = null;
           Hostname = System.Environment.MachineName;
           Host = Dns.GetHostEntry(Hostname);
           foreach (IPAddress IP in Host.AddressList)
           {
           if (IP.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
            {
             IPAddress1 = Convert.ToString(IP);
              }
              }
            string text_to_send = "Request to connect from: " + IPAddress1;
            if (text_to_send.Length == 0)
            {
            done = true;
             }
            else

            {
                       
          MessageBox.Show("Now listening on port 8001.");
          Socket sending_socket = new Socket(AddressFamily.InterNetwork,       SocketType.Dgram, ProtocolType.Udp);
          IPAddress send_to_address = IPAddress.Parse(RecieveIP.Text);
           IPEndPoint sending_end_point = new IPEndPoint(send_to_address, 8001);
   Console.WriteLine("Now sending out packet to be acknolwedged by lead computer.");

            byte[] send_buffer = Encoding.ASCII.GetBytes(text_to_send);
    Console.WriteLine("Listening for the attack information on port " + listenPort);
    recieve_byte_array = listener.Receive(ref groupEP);
    data_recieved = Encoding.ASCII.GetString(recieve_byte_array, 0, recieve_byte_array.Length);


    try
    {
    sending_socket.SendTo(send_buffer, sending_end_point);
     }
    catch (Exception send_exception)
      {

     Console.WriteLine("Exception {0}", send_exception);
       }
     MessageBox.Show("Listening for attack information.");

两台计算机正在通过ARP-A相互发现。所以想知道为什么他们不会收到彼此的消息？谢谢。