| // |
| // blocking_udp_echo_server.cpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2010 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| // |
| |
| #include <cstdlib> |
| #include <iostream> |
| #include <boost/asio.hpp> |
| |
| using boost::asio::ip::udp; |
| |
| enum { max_length = 1024 }; |
| |
| void server(boost::asio::io_service& io_service, short port) |
| { |
| udp::socket sock(io_service, udp::endpoint(udp::v4(), port)); |
| for (;;) |
| { |
| char data[max_length]; |
| udp::endpoint sender_endpoint; |
| size_t length = sock.receive_from( |
| boost::asio::buffer(data, max_length), sender_endpoint); |
| sock.send_to(boost::asio::buffer(data, length), sender_endpoint); |
| } |
| } |
| |
| int main(int argc, char* argv[]) |
| { |
| try |
| { |
| if (argc != 2) |
| { |
| std::cerr << "Usage: blocking_udp_echo_server <port>\n"; |
| return 1; |
| } |
| |
| boost::asio::io_service io_service; |
| |
| using namespace std; // For atoi. |
| server(io_service, atoi(argv[1])); |
| } |
| catch (std::exception& e) |
| { |
| std::cerr << "Exception: " << e.what() << "\n"; |
| } |
| |
| return 0; |
| } |