我进入UDP并决定只是为了练习而进行一次小聊天。 我遇到了一个问题,我自己无法弄明白。
我创建了两个完全相同的c#控制台程序(Just Port不同)
我发送UDP广播包,然后想要在第二个控制台程序上接收它。我发送广播的程序接收到它而其他程序没有接收到会发生什么。反过来也是如此。
我已经关闭了防火墙 - >不改变任何东西。
我发给你整个代码,我希望你们能帮助我,我真的很想继续前进!非常感谢你!
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();
}
}
答案 0 :(得分:1)
我只更改了代码的两个部分,在每个客户端上设置另一个客户端的远程端口号,试试这个:
在一位客户上:
const int PORT = 10101;
const int PORT_Remote = 10102;
IPEndPoint ip = new IPEndPoint(IPAddress.Parse("255.255.255.255"), PORT_Remote);
在另一个客户端:
const int PORT = 10102;
const int PORT_Remote = 10101;
IPEndPoint ip = new IPEndPoint(IPAddress.Parse("255.255.255.255"), PORT_Remote);
答案 1 :(得分:0)
我最近写了一个应用程序,我在笔记本电脑上的两个应用程序之间来回发送套接字消息。我使用127.0.0.1(本地主机的默认IP地址)作为IP地址。你能试试吗?