Created
July 26, 2016 05:23
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#include <ctime> | |
#include <iostream> | |
#include <string> | |
#include <boost/array.hpp> | |
#include <boost/bind.hpp> | |
#include <boost/shared_ptr.hpp> | |
#include <boost/asio.hpp> | |
using boost::asio::ip::udp; | |
std::string make_daytime_string() | |
{ | |
using namespace std; // For time_t, time and ctime; | |
time_t now = time(0); | |
return ctime(&now); | |
} | |
class udp_server | |
{ | |
public: | |
udp_server(boost::asio::io_service& io_service) | |
: socket_(io_service, udp::endpoint(udp::v4(), 13)) | |
{ | |
start_receive(); | |
} | |
private: | |
void start_receive() | |
{ | |
socket_.async_receive_from( | |
boost::asio::buffer(recv_buffer_), remote_endpoint_, | |
boost::bind(&udp_server::handle_receive, this, | |
boost::asio::placeholders::error, | |
boost::asio::placeholders::bytes_transferred)); | |
} | |
void handle_receive(const boost::system::error_code& error, | |
std::size_t /*bytes_transferred*/) | |
{ | |
if (!error || error == boost::asio::error::message_size) | |
{ | |
boost::shared_ptr<std::string> message( | |
new std::string(make_daytime_string())); | |
socket_.async_send_to(boost::asio::buffer(*message), remote_endpoint_, | |
boost::bind(&udp_server::handle_send, this, message, | |
boost::asio::placeholders::error, | |
boost::asio::placeholders::bytes_transferred)); | |
start_receive(); | |
} | |
} | |
void handle_send(boost::shared_ptr<std::string> /*message*/, | |
const boost::system::error_code& /*error*/, | |
std::size_t /*bytes_transferred*/) | |
{ | |
} | |
udp::socket socket_; | |
udp::endpoint remote_endpoint_; | |
boost::array<char, 1> recv_buffer_; | |
}; | |
int main() | |
{ | |
try | |
{ | |
boost::asio::io_service io_service; | |
udp_server server(io_service); | |
io_service.run(); | |
} | |
catch (std::exception& e) | |
{ | |
std::cerr << e.what() << std::endl; | |
} | |
return 0; | |
} |
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