Socket.Ttl 属性

public:
 property short Ttl { short get(); void set(short value); };

public short Ttl { get; set; }

member this.Ttl : int16 with get, set

Public Property Ttl As Short

属性值

TTL 值。

例外

示例

下面的代码示例演示如何使用 Ttl 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 = 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

TTL 值指示在路由器放弃数据包之前数据包可以遍历的最大路由器数，并且 Internet 控制消息协议 (ICMP) “超出 TTL”错误消息返回到发送方。

TTL 值可以设置为 0 到 255 的值。 如果未设置此属性，则套接字的默认 TTL 值为 32。

如果在传输控制协议 (TCP) 套接字上设置此属性，TCP/IP 堆栈会忽略使用套接字建立成功的连接。

如果收到 ， SocketException请使用 SocketException.ErrorCode 属性获取特定的错误代码。 获取此代码后，请参阅 Windows 套接字版本 2 API 错误代码 文档，了解错误的详细说明。