Question

我正在尝试使用相同问题的答案来禁用Nagle算法：ASIO ip::tcp::iostream and TCP_NODELAY：

    boost::asio::ip::tcp::iostream socketStream;
    const boost::asio::ip::tcp::no_delay option( true );
    socketStream.rdbuf()->set_option( option );
    boost::asio::io_service io_service;
    tcp::endpoint endpoint (tcp::v4 (), 6666);
    tcp::acceptor acceptor (io_service, endpoint);

    std::cout << "Waiting for connection.." << std::endl;
    acceptor.accept (*socketStream.rdbuf ());
    std::cout << "Connected!" << std::endl;

并且在运行代码时出现此错误：

set_option: Bad file descriptor

我该如何解决这个问题？

Answer 1

在您设置选项的情况下，流仍然无效（未打开）。

等待套接字打开，然后再设置选项：

<强> Live On Coliru

#include <boost/asio.hpp>
#include <iostream>

static boost::asio::ip::tcp::no_delay const no_delay_option (true);

int main() {
    using boost::asio::ip::tcp;

    tcp::iostream socketStream;


    boost::asio::io_service io_service;

    tcp::endpoint endpoint (tcp::v4(), 6666);
    tcp::acceptor acceptor (io_service, endpoint);

    std::cout << "Waiting for connection.." << std::endl;
    acceptor.accept (*socketStream.rdbuf ());
    socketStream.rdbuf()->set_option(no_delay_option);

    std::cout << "Connected!" << std::endl;
    std::cout << socketStream.rdbuf() << "\n";
}

（我们使用netcat将main.cpp发送到端口6666）

iostream和No_delay选项

1 个答案: