Socket.ExclusiveAddressUse 属性

定义

命名空间:

System.Net.Sockets

程序集:

System.Net.Sockets.dll

Source:

Socket.cs

获取或设置 Boolean 值，该值指定 Socket 是否仅允许一个进程绑定到端口。

public:
 property bool ExclusiveAddressUse { bool get(); void set(bool value); };

public bool ExclusiveAddressUse { get; set; }

member this.ExclusiveAddressUse : bool with get, set

Public Property ExclusiveAddressUse As Boolean

属性值

Boolean

如果 Socket 仅允许一个套接字绑定到特定端口，则为 true；否则为 false。 对于 Windows Server 2003 和 Windows XP Service Pack 2，对于所有其他版本，false默认值true为 。

例外

SocketException

尝试访问套接字时出错。

ObjectDisposedException

Socket 已关闭。

InvalidOperationException

已为此 Bind(EndPoint) 调用了 Socket。

示例

下面的代码示例演示如何使用 ExclusiveAddressUse 属性。

static void ConfigureTcpSocket(Socket^ tcpSocket)
{
     
    // Don't allow another socket to bind to this port.
    tcpSocket->ExclusiveAddressUse = true;
     
    // The socket will linger for 10 seconds after
    // Socket.Close is called.
    tcpSocket->LingerState = gcnew LingerOption(true, 10);
     
    // Disable the Nagle Algorithm for this tcp socket.
    tcpSocket->NoDelay = true;
     
    // Set the receive buffer size to 8k
    tcpSocket->ReceiveBufferSize = 8192;
     
    // Set the timeout for synchronous receive methods to
    // 1 second (1000 milliseconds.)
    tcpSocket->ReceiveTimeout = 1000;
     
    // Set the send buffer size to 8k.
    tcpSocket->SendBufferSize = 8192;
     
    // Set the timeout for synchronous send methods
    // to 1 second (1000 milliseconds.)
    tcpSocket->SendTimeout = 1000;
     
    // Set the Time To Live (TTL) to 42 router hops.
    tcpSocket->Ttl = 42;
    Console::WriteLine("Tcp Socket configured:");
    Console::WriteLine("  ExclusiveAddressUse {0}", 
        tcpSocket->ExclusiveAddressUse);
    Console::WriteLine("  LingerState {0}, {1}", 
        tcpSocket->LingerState->Enabled,
        tcpSocket->LingerState->LingerTime);
    Console::WriteLine("  NoDelay {0}",
        tcpSocket->NoDelay);
    Console::WriteLine("  ReceiveBufferSize {0}", 
        tcpSocket->ReceiveBufferSize);
    Console::WriteLine("  ReceiveTimeout {0}",
        tcpSocket->ReceiveTimeout);
    Console::WriteLine("  SendBufferSize {0}",
        tcpSocket->SendBufferSize);
    Console::WriteLine("  SendTimeout {0}",
        tcpSocket->SendTimeout);
    Console::WriteLine("  Ttl {0}",
        tcpSocket->Ttl);
    Console::WriteLine("  IsBound {0}",
        tcpSocket->IsBound);
    Console::WriteLine("");
}

static void ConfigureTcpSocket(Socket tcpSocket)
{
    // Don't allow another socket to bind to this port.
    tcpSocket.ExclusiveAddressUse = true;

    // The socket will linger for 10 seconds after
    // Socket.Close is called.
    tcpSocket.LingerState = new LingerOption (true, 10);

    // Disable the Nagle Algorithm for this tcp socket.
    tcpSocket.NoDelay = true;

    // Set the receive buffer size to 8k
    tcpSocket.ReceiveBufferSize = 8192;

    // Set the timeout for synchronous receive methods to
    // 1 second (1000 milliseconds.)
    tcpSocket.ReceiveTimeout = 1000;

    // Set the send buffer size to 8k.
    tcpSocket.SendBufferSize = 8192;

    // Set the timeout for synchronous send methods
    // to 1 second (1000 milliseconds.)
    tcpSocket.SendTimeout = 1000;

    // Set the Time To Live (TTL) to 42 router hops.
    tcpSocket.Ttl = 42;

    Console.WriteLine("Tcp Socket configured:");

    Console.WriteLine($"  ExclusiveAddressUse {tcpSocket.ExclusiveAddressUse}");

    Console.WriteLine($"  LingerState {tcpSocket.LingerState.Enabled}, {tcpSocket.LingerState.LingerTime}");

    Console.WriteLine($"  NoDelay {tcpSocket.NoDelay}");

    Console.WriteLine($"  ReceiveBufferSize {tcpSocket.ReceiveBufferSize}");

    Console.WriteLine($"  ReceiveTimeout {tcpSocket.ReceiveTimeout}");

    Console.WriteLine($"  SendBufferSize {tcpSocket.SendBufferSize}");

    Console.WriteLine($"  SendTimeout {tcpSocket.SendTimeout}");

    Console.WriteLine($"  Ttl {tcpSocket.Ttl}");

    Console.WriteLine($"  IsBound {tcpSocket.IsBound}");

    Console.WriteLine("");
}

注解

如果 ExclusiveAddressUse 为 false，则多个套接字可以使用 Bind 方法绑定到特定端口;但是，只有一个套接字可以对发送到该端口的网络流量执行操作。 如果多个套接字尝试使用 Bind(EndPoint) 方法绑定到特定端口，则具有更具体 IP 地址的套接字将处理发送到该端口的网络流量。

如果 ExclusiveAddressUse 为 true，则首次使用 Bind 方法尝试绑定到特定端口，而不考虑 Internet 协议 (IP) 地址，都将成功;后续使用 Bind 方法尝试绑定到该端口的所有操作都将失败，直到原始绑定套接字被销毁为止。

必须在调用 之前 Bind 设置此属性;否则 InvalidOperationException 将引发 。