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Stopping async_connect


Stopping async_connect

By : user2948243
Date : November 14 2020, 04:48 PM
should help you out There's nothing elementary wrong with the code, and it does exactly what you desire on my Linux box:
code :
TCP Connection in progress
Connection not established...
Trying to close socket...
TCP Connection failed

real    0m3.003s
user    0m0.002s
sys 0m0.000s
void stop()
{
    m_socket->cancel();
    m_socket->close();
}
void HandleWait(const boost::system::error_code& error)
{
    if (error && error != boost::asio::error::operation_aborted)
    {
        std::cout << "Connection not established..." << std::endl;
        std::cout << "Trying to close socket..."     << std::endl;
        stop();
        return;
    }
}


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Asio::async_connect and io_service.run don't compile

Asio::async_connect and io_service.run don't compile


By : Jake Smith
Date : March 29 2020, 07:55 AM
Hope that helps I am learning to use Boost ASIO. Here is my code adapted from the Boost doc's chat example. , Since your cb has signature
code :
void AsioCommunicationService::handle_connect(const boost::system::error_code& error)
tcp::endpoint endpoint = *endpoint_iterator;
socket_.async_connect(endpoint,
    boost::bind(&AsioCommunicationService::handle_connect, this,
    boost::asio::placeholders::error, ++endpoint_iterator));
boost::bind(&AsioCommunicationService::handle_connect, this,
        boost::asio::placeholders::error));
using boost::async_connect issues

using boost::async_connect issues


By : Crimz_27
Date : March 29 2020, 07:55 AM
This might help you If you use std::bind you also need to use the std::placeholders. The asio placeholders work only with boost::bind.
So this should fix it:
code :
auto f = std::bind(&Irc::connect_handler, this, std::placeholders::_1, std::placeholders::_2);
Is async_connect really asynchronous under GNU/Linux?

Is async_connect really asynchronous under GNU/Linux?


By : Charles Comer
Date : March 29 2020, 07:55 AM
will be helpful for those in need A weird thing about boost.asio -- not unique to it, but generally different from OS-specific asynchronous networking frameworks -- is that it does not rely on auxiliary threads. That has a number of important consequences, which can be boiled down to this: boost.asio is NOT for doing things in the background. Rather, it is for doing multiple things in the foreground.
io_service::run() is the "hub" of boost.asio, and a single-threaded program using boost.asio should expect to spend most of its time waiting inside io_service::run(), or executing a completion handler called by it. Depending on the OS-specific internal implementation, it might or might not be possible to have particular asynchronous operations running before that function gets called, which is why calling it is basically the first thing you do once you've kicked off your initial asynchronous requests.
async_connect successfull if server is not running

async_connect successfull if server is not running


By : joaquimamado
Date : March 29 2020, 07:55 AM
will help you I am trying to check whether boost::asio::async_connect was successfull, but I do not get an error, even if the server is not startet. How do I check for success correctly? Thank you! , You have an acceptor bound to the port:
code :
... acceptor(io_service, boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), 12121)) ...
How to use boost::aio::async_connect with lambda

How to use boost::aio::async_connect with lambda


By : user2816049
Date : March 29 2020, 07:55 AM
Does that help You call async_connect with pair of iterators, so your lambda should meet iterator connect handler requirements. As second parameter you have to pass connected endpoint.
code :
boost::asio::async_connect(ws->next_layer().next_layer(),
    results.begin(),
    results.end(),
        [&, sp](  boost::system::error_code ec,
                  boost::asio::ip::tcp::resolver::iterator it) 
           {
           if (ec) {
               return;
           }
           //...
void on_connect(){}

boost::asio::async_connect(ws->next_layer().next_layer(),
        results.begin(), results.end(), std::bind(on_connect)); // compiles fine
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