接收对UDP广播(C#)的答复
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我正在尝试发送udp广播,并使用c#接收答案。虽然发送广播的效果很好,但是我在C#中没有收到任何答案。但是当我看一下wireshark时,我可以看到已经发送了一个答案:
从192.168.0.141发送到192.168.0.255
从192.168.0.105发送到255.255.255.255(这就是答案)
Wireshark日志:
1 0.000000 192.168.0.141 192.168.0.255 UDP Source port: 55487 Destination port: 17784
2 0.000851 192.168.0.105 255.255.255.255 UDP Source port: 17784 Destination port: 55487
那就是我的C#代码:
private static byte[] SendBuffer = new byte[] { 1, 2, 3 };
public static void SendAndReceiveBroadcast( byte[] data, IPEndPoint broadcastEndpoint )
{
using( Socket broadcastSocket = new Socket( AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp ) )
{
broadcastSocket.SetSocketOption( SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1 );
broadcastSocket.SendTo( data, broadcastEndpoint );
receivePort = broadcastSocket.LocalEndPoint.ToString().Split( \':\' )[1];
Console.WriteLine( \"Sent {0} from Port {1}\", CollectionsHelper.ItemsToString( data, \"{0:X2}\" ), broadcastSocket.LocalEndPoint.ToString() );
broadcastSocket.Close();
}
using( Socket receiveSocket = new Socket( AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp ) )
{
IPEndPoint broadcastAddress = new IPEndPoint( IPAddress.Any, Convert.ToInt32( receivePort ) );
UdpClient udpClient = new UdpClient();
udpClient.Client.SetSocketOption( SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true );
udpClient.Client.Bind( broadcastAddress );
IPEndPoint remoteIP = new IPEndPoint( IPAddress.Any, Convert.ToInt32( receivePort ) );
byte[] answer = udpClient.Receive( ref remoteIP );
}
}
调用udpClient.Receive时程序停止。有人可以帮我吗? :)
没有找到相关结果
已邀请:
2 个回复
温拎凯玛
。
表示TCP。 如果我没记错的话,广播消息不会排队。广播之前叫
,之后叫
。
嗜蒂谷尘旱