89 lines
2.2 KiB
C++
89 lines
2.2 KiB
C++
//
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// receiver.cpp
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// ~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include <array>
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#include <iostream>
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#include <string>
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#include <boost/asio.hpp>
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constexpr short multicast_port = 30001;
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class receiver
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{
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public:
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receiver(boost::asio::io_context& io_context,
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const boost::asio::ip::address& listen_address,
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const boost::asio::ip::address& multicast_address)
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: socket_(io_context)
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{
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// Create the socket so that multiple may be bound to the same address.
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boost::asio::ip::udp::endpoint listen_endpoint(
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listen_address, multicast_port);
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socket_.open(listen_endpoint.protocol());
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socket_.set_option(boost::asio::ip::udp::socket::reuse_address(true));
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socket_.bind(listen_endpoint);
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// Join the multicast group.
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socket_.set_option(
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boost::asio::ip::multicast::join_group(multicast_address));
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do_receive();
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}
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private:
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void do_receive()
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{
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socket_.async_receive_from(
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boost::asio::buffer(data_), sender_endpoint_,
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[this](boost::system::error_code ec, std::size_t length)
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{
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if (!ec)
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{
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std::cout.write(data_.data(), length);
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std::cout << std::endl;
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do_receive();
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}
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});
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}
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boost::asio::ip::udp::socket socket_;
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boost::asio::ip::udp::endpoint sender_endpoint_;
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std::array<char, 1024> data_;
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};
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int main(int argc, char* argv[])
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{
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try
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{
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if (argc != 3)
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{
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std::cerr << "Usage: receiver <listen_address> <multicast_address>\n";
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std::cerr << " For IPv4, try:\n";
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std::cerr << " receiver 0.0.0.0 239.255.0.1\n";
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std::cerr << " For IPv6, try:\n";
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std::cerr << " receiver 0::0 ff31::8000:1234\n";
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return 1;
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}
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boost::asio::io_context io_context;
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receiver r(io_context,
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boost::asio::ip::make_address(argv[1]),
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boost::asio::ip::make_address(argv[2]));
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io_context.run();
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}
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catch (std::exception& e)
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{
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std::cerr << "Exception: " << e.what() << "\n";
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}
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return 0;
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}
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