open_source / socket-cpp

  #include <iostream>
  #include <thread>
  #include "sockpp/udp_socket.h"
  #include "sockpp/udp6_socket.h"
  #include "sockpp/version.h"
  
  using namespace std;
  
  // --------------------------------------------------------------------------
  // The thread function. This is run in a separate thread for each socket.
  // Ownership of the socket object is transferred to the thread, so when this
  // function exits, the socket is automatically closed.
  
  template <typename UDPSOCK>
  void run_echo(UDPSOCK sock)
  {
  	ssize_t n;
  	char buf[512];
  
  	// Each UDP socket type knows its address type as `addr_t`
  	typename UDPSOCK::addr_t srcAddr;
  
  	// Read some data, also getting the address of the sender,
  	// then just send it back.
  	while ((n = sock.recv_from(buf, sizeof(buf), &srcAddr)) > 0)
  		sock.send_to(buf, n, srcAddr);
  }
  
  // --------------------------------------------------------------------------
  // The main thread creates the two UDP sockets (one each for IPv4 and IPv6),
  // and then starts them running the echo function each in a separate thread.
  
  int main(int argc, char* argv[])
  {
  	cout << "Sample UDP echo server for 'sockpp' "

  		<< osdev::components::socket-cpp::SOCKPP_VERSION << '\n' << endl;

  
  	in_port_t port = (argc > 1) ? atoi(argv[1]) : 12345;
  

  	osdev::components::socket-cpp::socket_initializer sockInit;

  	osdev::components::socket-cpp::udp_socket	udpsock;

  	if (!udpsock) {
  		cerr << "Error creating the UDP v4 socket: " << udpsock.last_error_str() << endl;
  		return 1;
  	}
  

  	if (!udpsock.bind(osdev::components::socket-cpp::inet_address("localhost", port))) {

  		cerr << "Error binding the UDP v4 socket: " << udpsock.last_error_str() << endl;
  		return 1;
  	}
  

  	osdev::components::socket-cpp::udp6_socket	udp6sock;

  	if (!udp6sock) {
  		cerr << "Error creating the UDP v6 socket: " << udp6sock.last_error_str() << endl;
  		return 1;
  	}
  

  	if (!udp6sock.bind(osdev::components::socket-cpp::inet6_address("localhost", port))) {

  		cerr << "Error binding the UDP v6 socket: " << udp6sock.last_error_str() << endl;
  		return 1;
  	}
  
  	// Spin up a thread to run the IPv4 socket.

  	thread thr(run_echo<osdev::components::socket-cpp::udp_socket>, std::move(udpsock));

  	thr.detach();
  
  	// Run the IPv6 socket in this thread. (Call doesn't return)
  	run_echo(std::move(udp6sock));
  	return 0;
  }