#include <boost/asio.hpp>
#include <iostream>
#include <cstdlib>
#include <exception>

using namespace std;
using boost::asio::ip::tcp;

char* cmdname;

void usage() {
   cerr << "Usage: " << cmdname << " server port" << endl;
   exit(1);
}

int main(int argc, char* argv[]) {
   // process command line arguments
   cmdname = *argv++; --argc;
   if (argc != 2) usage();
   std::string server(argv[0]);
   std::string port(argv[1]);

   // connect to given server
   boost::asio::io_service io_service;
   tcp::resolver resolver(io_service);
   tcp::resolver::query query(server, port);
   tcp::socket socket(io_service);
   tcp::resolver::iterator end;
   bool opened = false;
   for (tcp::resolver::iterator it = resolver.resolve(query);
	 it != end; ++it) {
      boost::system::error_code error;
      socket.connect(*it, error);
      if (!error) {
	 opened = true; break;
      }
      socket.close();
   }
   if (!opened) {
      cerr << cmdname << ": cannot connect to " << server << " "
	 << port << endl;
      exit(1);
   }

   try {
      // read input (under the assumption that we get just one packet)
      boost::array<char, 128> timebuf;
      size_t nbytes = socket.read_some(boost::asio::buffer(timebuf));
      std::cout.write(timebuf.data(), nbytes);
   } catch (std::exception& e) {
      cout << cmdname << ": server failure: " << e.what() << endl;
      exit(1);
   }
}