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- //
- // sender.cpp
- // ~~~~~~~~~~
- //
- // Copyright (c) 2003-2019 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 <sstream>
- #include <string>
- #include <boost/asio.hpp>
- constexpr short multicast_port = 30001;
- constexpr int max_message_count = 10;
- class sender
- {
- public:
- sender(boost::asio::io_context& io_context,
- const boost::asio::ip::address& multicast_address)
- : endpoint_(multicast_address, multicast_port),
- socket_(io_context, endpoint_.protocol()),
- timer_(io_context),
- message_count_(0)
- {
- do_send();
- }
- private:
- void do_send()
- {
- std::ostringstream os;
- os << "Message " << message_count_++;
- message_ = os.str();
- socket_.async_send_to(
- boost::asio::buffer(message_), endpoint_,
- [this](boost::system::error_code ec, std::size_t /*length*/)
- {
- if (!ec && message_count_ < max_message_count)
- do_timeout();
- });
- }
- void do_timeout()
- {
- timer_.expires_after(std::chrono::seconds(1));
- timer_.async_wait(
- [this](boost::system::error_code ec)
- {
- if (!ec)
- do_send();
- });
- }
- private:
- boost::asio::ip::udp::endpoint endpoint_;
- boost::asio::ip::udp::socket socket_;
- boost::asio::steady_timer timer_;
- int message_count_;
- std::string message_;
- };
- int main(int argc, char* argv[])
- {
- try
- {
- if (argc != 2)
- {
- std::cerr << "Usage: sender <multicast_address>\n";
- std::cerr << " For IPv4, try:\n";
- std::cerr << " sender 239.255.0.1\n";
- std::cerr << " For IPv6, try:\n";
- std::cerr << " sender ff31::8000:1234\n";
- return 1;
- }
- boost::asio::io_context io_context;
- sender s(io_context, boost::asio::ip::make_address(argv[1]));
- io_context.run();
- }
- catch (std::exception& e)
- {
- std::cerr << "Exception: " << e.what() << "\n";
- }
- return 0;
- }
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