Socket.NoDelay 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，该值指定流 Socket 是否正在使用 Nagle 算法。

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

public bool NoDelay { get; set; }

member this.NoDelay : bool with get, set

Public Property NoDelay As Boolean

属性值

Boolean

如果 Socket 使用 Nagle 算法，则为 false；否则为 true。 默认值为 false。

例外

SocketException

尝试访问 Socket 时出错。

ObjectDisposedException

Socket 已关闭。

示例

下面的代码示例演示如何使用 NoDelay 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

Nagle 算法旨在减少网络流量，方法是使套接字缓冲小数据包，然后在某些情况下将它们合并并发送到一个数据包中。 TCP 数据包由 40 个字节的标头加上要发送的数据组成。 使用 TCP 发送小数据包时，TCP 标头导致的开销可能会成为网络流量的重要组成部分。 在负载较重的网络上，此开销导致的拥塞可能会导致数据丢失和重新传输，以及拥塞导致的传播时间过长。 如果连接上以前传输的任何数据未确认，则 Nagle 算法会阻止从用户收到新的传出数据时发送新的 TCP 段。

大多数网络应用程序应使用 Nagle 算法。

在用户数据报协议 (UDP) 套接字上设置此属性将不起作用。