我正在使用 system.Net.Socket 从服务器向客户端发送和接收消息。但是当多个服务器广播消息然后接收器程序突然关闭时遇到问题。
我的广播服务器代码如下..
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
public class Broadcst
{
public static void Main()
{
Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
IPEndPoint iep1 = new IPEndPoint(IPAddress.Broadcast, 9050);
IPEndPoint iep2 = new IPEndPoint(IPAddress.Parse("192.168.1.255"), 9050);
string hostname = Dns.GetHostName();
byte[] data = Encoding.ASCII.GetBytes(hostname);
sock.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1);
sock.SendTo(data, iep1);
sock.SendTo(data, iep2);
sock.Close();
}
}
我的接收方代码如下所示...
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
public class RecvBroadcst
{
public static void Main()
{
Socket sock = new Socket(AddressFamily.InterNetwork,
SocketType.Dgram, ProtocolType.Udp);
While(true){
IPEndPoint iep = new IPEndPoint(IPAddress.Any, 9050);
sock.Bind(iep);
EndPoint ep = (EndPoint)iep;
Console.WriteLine("Ready to receive...");
byte[] data = new byte[1024];
int recv = sock.ReceiveFrom(data, ref ep);
string stringData = Encoding.ASCII.GetString(data, 0, recv);
Console.WriteLine("received: {0} from: {1}",
stringData, ep.ToString());
data = new byte[1024];
recv = sock.ReceiveFrom(data, ref ep);
stringData = Encoding.ASCII.GetString(data, 0, recv);
Console.WriteLine("received: {0} from: {1}",
stringData, ep.ToString());
}
sock.Close();
}
}
那么当有多个服务器广播时,客户端如何接收多个广播消息呢?
当我再次从服务器发送消息时,它会抛出错误,例如“每个套接字地址(协议/网络地址/端口)通常只允许使用一次”