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//
// sender.cpp
// ~~~~~~~~~~
//
// Copyright (c) 2003-2018 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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