boost-asio

问题 I have no knowledge in node.js . I am sending UDP packets in C++ and I want to show them in node.js . The problem is that both try to occupy the IP/port. Depending on which one I run, the other one fails. How should I fix this problem? main.cpp // g++ main.cpp -o main -std=c++11 -lboost_system -pthread #include <iostream> #include <stdio.h> #include <string> #include <boost/asio.hpp> using boost::asio::ip::udp; int main(int argc, char* argv[]) { const int port=1414; const std::string ip="127

问题 I have a method that gets called via a third party from IO service. My method is supposed to return a boolean. However, I need to post another task to the same IO service, and wait for it to complete before I know the result. How can I return control to the IO loop while I wait for the other task to finish? (I can add multiple threads, but then there could be multiple calls to my methods, and you'd still end up with a deadlock) Call graph before: <thread> io_service third_party my_stuff | | |

问题 I am adapting this example to check if a message has taken too long to receive. read_complete is called, when read_start has finished. However, I have to check, if the received data is complete and interpret it as incomplete, if it is not fully received in a given time. These are my extensions to the code above in code/pseudocode: void read_complete(const boost::system::error_code& error, size_t bytes_transferred) { // the asynchronous read operation has now completed or failed and returned

问题 I have a class called NIUserSession which handles a SSL-encrypted connection with a client. This is it, although I removed everything which is not relevant for my question: typedef boost::asio::ssl::stream<boost::asio::ip::tcp::socket> ssl_socket; class NIUserSession { public: /*....*/ void readUntil(std::string until); /*....*/ private: /*....*/ void readHandler(const boost::system::error_code& error, std::size_t bytes_transferred); ssl_socket socket_; boost::asio::streambuf readBuffer; /*..

问题 I am trying to make a simple UDP client/server test using Boost::asio. I've already read the documentation and the official tutorials, but I still couldn't get it right. My problem is specifically on the client side. Here's what I want the client to do: it has to send a simple datagram to the server running at localhost:12345 and then subsequently listen for the response datagram that the server sends. That's not what I am getting, though. Looks like the client is sending the datagram alright

问题 I have been using the following example posted in this same site. This is my version of it. (Please excuse my lack of experience with C socket programming:) In constructor: server::server(io_service& io_service, const int port) : udpsocket_(io_service, udp::endpoint(udp::v4(), port))) { int sock = udpsocket_.native(); fd_set fdset; FD_ZERO(&fdset); FD_SET(sock, &fdset); int opt = 1; setsockopt(sock, IPPROTO_IP, IP_PKTINFO, &opt, sizeof(opt)); } Where "udpsocket_" is actually a boost asio udp

问题 Is there a way to send a packet to a client knowing the remote_endpoint object where endpoint.address and endpoint.port are used? EDIT : I added the async_write free function but I still don't know how to specify the ip-address or the port for the socket_ to send data_ to (the client). The changes are lines 44-49 to the boost async server example. #include <cstdlib> #include <iostream> #include <boost/bind.hpp> #include <boost/asio.hpp> using boost::asio::ip::tcp; class session { public:

问题 I am tryin to develop ASIO Application and have referred Chat-Server When my CServer Object destructs it causes CSerSessionsManager Object to destruct- which holds shared pointer to all active chat sessions. It causes all active CSerCession Objects to destroy as well. See the Definitions class CServer { CServer(asio::io_service& io_service, const std::string serIdentity, std::string IP, const std::string port); ~CServer(); ..... private: mutable tcp::acceptor acceptor_; // only in the

问题 I'm trying to use a boost::lockfree queue to manage tasks. These tasks retrieve data and would be processed on a worker thread. Once data is retrieved, a signal should be sent to the main thread with the data. The worker thread is spawned at the start of the application and just keeps polling the queue. I'm new to Boost::Asio but from my research, it seems to be the best mechanism for sending signals between threads. I've looked at several examples, in particular: Confused when boost::asio:

问题 Please refer to the ASIO examples at : http://www.boost.org/doc/libs/1_57_0/doc/html/boost_asio/examples/cpp03_examples.html The connection class code is at : http://www.boost.org/doc/libs/1_57_0/doc/html/boost_asio/example/cpp03/http/server/connection.cpp This class has a stop() function which calls stop on socket that has been created corresponding to a connection request to server (from void server::start_accept()) The client code resides at : http://www.boost.org/doc/libs/1_57_0/doc/html