我进入了UDP,并决定为练习做一个小聊天。 我遇到了一个问题,我无法弄清楚自己。c#udp广播包没有收到
我创建了两个C#控制台程序这是完全一样的(只是端口不同)
我发送一个UDP广播包,然后希望得到它的第二个控制台程序。发生什么事是我发送广播的节目接收它而另一节目则不收。反过来也是如此。
我已经关闭了防火墙 - >不会改变任何东西。
我发布你的整个代码,我希望你们可以帮助我,我真的很喜欢继续前进!非常感谢!
class Program
{
const int PORT = 10101;
private static readonly UdpClient udpclient = new UdpClient(PORT);
static void Main(string[] args)
{
Console.ForegroundColor = ConsoleColor.Red;
udpclient.EnableBroadcast = true;
//bool for calling async receiver just once
bool receiving = false;
Console.WriteLine("Chat 2");
//to keep while loop running --> change later
bool keepchatting = true;
#region keepchating loop
while (keepchatting)
{
if (!receiving)
{
startlistening();
}
receiving = true;
newmessage();
}
}
#endregion
//new message --> call sendmessage to broadcast text via UDP
public static void newmessage()
{
string msg;
msg = Console.ReadLine();
byte[] message = Encoding.ASCII.GetBytes(msg);
sendmessage(message);
}
//Broadcast text via UDP
public static void sendmessage(byte[] tosend)
{
UdpClient client = new UdpClient();
client.EnableBroadcast = true;
IPEndPoint ip = new IPEndPoint(IPAddress.Parse("255.255.255.255"), PORT);
client.Send(tosend, tosend.Length, ip);
client.Close();
Console.WriteLine("Sent!");
}
static IAsyncResult ar = null;
//Setup Async Receive Method
public static void startlistening()
{
ar = udpclient.BeginReceive(RecievedMessage, new object());
}
//Message
public static void RecievedMessage(IAsyncResult ar)
{
IPEndPoint ip = new IPEndPoint(IPAddress.Any, PORT);
byte[] bytes = udpclient.EndReceive(ar, ref ip);
string msg = Encoding.ASCII.GetString(bytes);
Console.WriteLine("Received: " + msg);
startlistening();
}
}
尝试使用多播IP 224-239进行广播。 braodcast IP 255.255.255.255是为某些协议保留的。我从来没有能够得到它的工作。 – jdweng