| // |
| // receiver.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 <iostream> |
| #include <string> |
| #include <boost/asio.hpp> |
| #include "boost/bind.hpp" |
| |
| const short multicast_port = 30001; |
| |
| class receiver |
| { |
| public: |
| receiver(boost::asio::io_service& io_service, |
| const boost::asio::ip::address& listen_address, |
| const boost::asio::ip::address& multicast_address) |
| : socket_(io_service) |
| { |
| // Create the socket so that multiple may be bound to the same address. |
| boost::asio::ip::udp::endpoint listen_endpoint( |
| listen_address, multicast_port); |
| socket_.open(listen_endpoint.protocol()); |
| socket_.set_option(boost::asio::ip::udp::socket::reuse_address(true)); |
| socket_.bind(listen_endpoint); |
| |
| // Join the multicast group. |
| socket_.set_option( |
| boost::asio::ip::multicast::join_group(multicast_address)); |
| |
| socket_.async_receive_from( |
| boost::asio::buffer(data_, max_length), sender_endpoint_, |
| boost::bind(&receiver::handle_receive_from, this, |
| boost::asio::placeholders::error, |
| boost::asio::placeholders::bytes_transferred)); |
| } |
| |
| void handle_receive_from(const boost::system::error_code& error, |
| size_t bytes_recvd) |
| { |
| if (!error) |
| { |
| std::cout.write(data_, bytes_recvd); |
| std::cout << std::endl; |
| |
| socket_.async_receive_from( |
| boost::asio::buffer(data_, max_length), sender_endpoint_, |
| boost::bind(&receiver::handle_receive_from, this, |
| boost::asio::placeholders::error, |
| boost::asio::placeholders::bytes_transferred)); |
| } |
| } |
| |
| private: |
| boost::asio::ip::udp::socket socket_; |
| boost::asio::ip::udp::endpoint sender_endpoint_; |
| enum { max_length = 1024 }; |
| char data_[max_length]; |
| }; |
| |
| int main(int argc, char* argv[]) |
| { |
| try |
| { |
| if (argc != 3) |
| { |
| std::cerr << "Usage: receiver <listen_address> <multicast_address>\n"; |
| std::cerr << " For IPv4, try:\n"; |
| std::cerr << " receiver 0.0.0.0 239.255.0.1\n"; |
| std::cerr << " For IPv6, try:\n"; |
| std::cerr << " receiver 0::0 ff31::8000:1234\n"; |
| return 1; |
| } |
| |
| boost::asio::io_service io_service; |
| receiver r(io_service, |
| boost::asio::ip::address::from_string(argv[1]), |
| boost::asio::ip::address::from_string(argv[2])); |
| io_service.run(); |
| } |
| catch (std::exception& e) |
| { |
| std::cerr << "Exception: " << e.what() << "\n"; |
| } |
| |
| return 0; |
| } |