boost-asio

问题 When I use spawn to start a new stackfull coroutine in a coroutine, valgrind says a lot of using uninitialised value(valgrind output). Then I use io_service.post to invoke a handler,and start a new stackfull coroutine in it, every thing seems fine. I have searched and read some documents, but can't find something about how to create a new stackfull coroutine safely in a stackfull coroutine. Here is the code: #include <iostream> #include <boost/asio.hpp> #include <boost/asio/spawn.hpp>

问题 I have a C++ boost client that does a blocking connect and processes the message once it receives a response. I am facing a strange issue. tcp::resolver::query query(tcp::v6(), this->host, port,tcp::resolver::query::v4_mapped); iterator = resolver.resolve(query); socket = new tcp::socket(io_service); socket->connect(*iterator); I tried to connect to a machine that was not reachable by ping6 (but was IPV6 enabled). Still, I didn't get any error while trying to resolve the query in line-2. As a

问题 Here's the code I use: class Server { ..... void Server::accepted() { std::cout << "Accepted!" << std::endl; boost::array<char, 1> buf; boost::asio::async_read(socket, boost::asio::buffer(buf), boost::bind(&Server::handleRead, this, buf, boost::asio::placeholders::error)); } void Server::handleRead(boost::array<char, 1> buf, const boost::system::error_code& error) { if(!error) { std::cout << "Message: " << buf.data() << std::endl; } else { std::cout << "Error occurred." << std::endl; } } ....

问题 Consider an echo server implemented using Boost.asio. Read events from connected clients result in blocks of data being placed on to an arrival event queue. A pool of threads works through these events - for each event, a thread takes the data in the event and echos it back to the connected client. As shown in the diagram above, there could be multiple events in the event queue all from a single client. In order to ensure that these events for a given client are executed and delivered in

问题 I need to communicate with a different device in a private network over UDP. I am new to using boost, but based on what I searched online and also the tutorials on Boost website, I came up with below code.. I am currently trying to send and receive data from my own device. Just to unit test and finalize the code. Question: I am unable to receive any message. What am I missing? #include <iostream> #include <cstdio> #include <cstdlib> #include <string> #include "boost/asio.hpp" #include <thread

问题 Boost asio specifically allows multiple threads to call the run() method on an io_service. This seems like a great way to create a multithreaded UDP server. However, I've hit a snag that I'm struggling to get an answer to. Looking at a typical async_receive_from call: m_socket->async_receive_from( boost::asio::buffer(m_recv_buffer), m_remote_endpoint, boost::bind( &udp_server::handle_receive, this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred)); The remote

问题 The boost docs say that cancelled async connect, send and receive finish immediately, and the handlers for cancelled operations will be passed the boost::asio::error::operation_aborted error. I would like to find out if the cancelled handler gets to run (and see the operation_aborted error) before other (non-cancelled, and newly scheduled) completion handlers run. Here is the timeline that concerns me: acceptHandler and readHandler are running on the same event loop and the same thread. time

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 6 years ago . 2nd update : Now the server says: "Ready to start TLS", how to modify my code to perform this TLS negotiation? I am trying to use boost asio to send an email from one account to another, but failing. #include <istream> #include <ostream> #include <string> #include <boost/asio.hpp>

问题 I have an UDP socket that will receive some packets, of potentially different sizes, and I handle this asynchronously: socket.async_receive_from(boost::asio::buffer(buffer, 65536), senderEndpoint, handler); The problem here is that to handle the different sizes I have a big buffer, something that could be addressed with variable size buffers. To my understanding, when using async_receive_from , the handler is called with only one packet at a time, because the packet boundaries are preserved

问题 I thought I had found the answer in the following example, but not quite. boost::asio::ip::udp::socket socket(io_service); ... boost::asio::ip::address_v4 local_interface = boost::asio::ip::address_v4::from_string("1.2.3.4"); boost::asio::ip::multicast::outbound_interface option(local_interface); socket.set_option(option); How do I map eth0 to the appropriate outbound_interface option? 回答1: The following code works fine on Windows and Mac OS X: const ip::udp::resolver::query queryIF( ip::udp: