为什么会为 TcpClient(IPEndPoint) 而不是 TcpClient(String, Int32) 抛出正在使用的套接字异常？

Question

为什么 TcpClient(IPEndPoint) but not TcpClient(String, Int32) 会抛出套接字正在使用异常？

我的代码中有一个我使用的侦听器（ip 是 ::1，端口是 12345）

listener = new TcpListener(ip, port); //create listener
listener.Start(); //start listener
//now code will wait at the while loop until someone connects.
while (listener.Pending()) { System.Threading.Thread.Sleep(1000); } //check for pending connections every second.
client = listener.AcceptTcpClient(); //when incoming connection is found accept it.

注意代码在Task listenerTask = Task.Run(() =>{});

中

在另一个任务中我有以下内容

//client = new TcpClient(new IPEndPoint(ip, port)); //does not work
client = new TcpClient("localhost", port); //localhost resolves to ::1

所以怎么回事？有什么不同？我对 localhost 解析为 ::1 的看法是错误的吗？如果它不能解决那个问题，那么我的程序如何才能自行回显？

在此期间我会尝试获取更多信息。

异常详情：

System.Net.Sockets.SocketException was unhandled
ErrorCode=10048
HResult=-2147467259
Message=Only one usage of each socket address (protocol/network address/port) is normally permitted
NativeErrorCode=10048
Source=System
StackTrace:
     at System.Net.Sockets.Socket.DoBind(EndPoint endPointSnapshot, SocketAddress socketAddress)
     at System.Net.Sockets.Socket.Bind(EndPoint localEP)
     at System.Net.Sockets.TcpClient..ctor(IPEndPoint localEP)
     at ConsoleApplication1.Program.Connector(IPAddress[] ips, Int32 port)

Answer 1

我的代码为：

client = new TcpClient(new IPEndPoint(ip, port));

将本地端口与本地IP地址绑定，供以后使用。

一旦知道这一点，我就能够将我的代码更改为以下内容，并且它按照我的预期工作：

client = new TcpClient(new IPEndPoint(localIp, localPort)); //sets up how we are going to be connecting.
client.Connect(remoteIp, remotePort); //does the real connecting.

来源：https://msdn.microsoft.com/en-us/library/system.net.sockets.tcpclient%28v=vs.110%29.aspx

为什么会为 TcpClient(IPEndPoint) 而不是 TcpClient(String, Int32) 抛出正在使用的套接字异常？

Why would a socket in use exception be thrown for TcpClient(IPEndPoint) but not TcpClient(String, Int32)?

.net

c#

network-programming

localhost

windows-10