简易asio tcp server

#include <iostream>
#include "boost/asio.hpp"
using namespace std;
using namespace boost::asio;
io_service G_IOS;

int main() {
  ip::tcp::endpoint ep(ip::tcp::v4(), 2110);
  ip::tcp::acceptor acceptor(G_IOS, ep);
  while (true) {
    ip::tcp::socket sock(G_IOS);
        acceptor.accept(sock);
        cout << "client addr = " << sock.remote_endpoint().address() << endl;
        sock.write_some(buffer("hello asio"));
  }

  return 0;
}