#include <iostream>
#include <string>
#include "asio.hpp"
#include "boost/bind.hpp"
const short multicast_port = 30001;
class receiver
{
public:
receiver(asio::io_service& io_service,
const asio::ip::address& listen_address,
const asio::ip::address& multicast_address)
: socket_(io_service)
{
asio::ip::udp::endpoint listen_endpoint(
listen_address, multicast_port);
socket_.open(listen_endpoint.protocol());
socket_.set_option(asio::ip::udp::socket::reuse_address(true));
socket_.bind(listen_endpoint);
socket_.set_option(
asio::ip::multicast::join_group(multicast_address));
socket_.async_receive_from(
asio::buffer(data_, max_length), sender_endpoint_,
boost::bind(&receiver::handle_receive_from, this,
asio::placeholders::error,
asio::placeholders::bytes_transferred));
}
void handle_receive_from(const asio::error& error, size_t bytes_recvd)
{
if (!error)
{
std::cout.write(data_, bytes_recvd);
std::cout << std::endl;
socket_.async_receive_from(
asio::buffer(data_, max_length), sender_endpoint_,
boost::bind(&receiver::handle_receive_from, this,
asio::placeholders::error,
asio::placeholders::bytes_transferred));
}
}
private:
asio::ip::udp::socket socket_;
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;
}
asio::io_service io_service;
receiver r(io_service,
asio::ip::address::from_string(argv[1]),
asio::ip::address::from_string(argv[2]));
io_service.run();
}
catch (std::exception& e)
{
std::cerr << "Exception: " << e.what() << "\n";
}
return 0;
}