#include <cstdlib>
#include <iostream>
#include <boost/bind.hpp>
#include "asio.hpp"
#include "asio/ssl.hpp"
typedef asio::ssl::stream<asio::ip::tcp::socket> ssl_socket;
class session
{
public:
session(asio::io_service& io_service, asio::ssl::context& context)
: socket_(io_service, context)
{
}
ssl_socket::lowest_layer_type& socket()
{
return socket_.lowest_layer();
}
void start()
{
socket_.async_handshake(asio::ssl::stream_base::server,
boost::bind(&session::handle_handshake, this,
asio::placeholders::error));
}
void handle_handshake(const asio::error& error)
{
if (!error)
{
socket_.async_read_some(asio::buffer(data_, max_length),
boost::bind(&session::handle_read, this,
asio::placeholders::error,
asio::placeholders::bytes_transferred));
}
else
{
delete this;
}
}
void handle_read(const asio::error& error, size_t bytes_transferred)
{
if (!error)
{
asio::async_write(socket_,
asio::buffer(data_, bytes_transferred),
boost::bind(&session::handle_write, this,
asio::placeholders::error));
}
else
{
delete this;
}
}
void handle_write(const asio::error& error)
{
if (!error)
{
socket_.async_read_some(asio::buffer(data_, max_length),
boost::bind(&session::handle_read, this,
asio::placeholders::error,
asio::placeholders::bytes_transferred));
}
else
{
delete this;
}
}
private:
ssl_socket socket_;
enum { max_length = 1024 };
char data_[max_length];
};
class server
{
public:
server(asio::io_service& io_service, unsigned short port)
: io_service_(io_service),
acceptor_(io_service,
asio::ip::tcp::endpoint(asio::ip::tcp::v4(), port)),
context_(io_service, asio::ssl::context::sslv23)
{
context_.set_options(
asio::ssl::context::default_workarounds
| asio::ssl::context::no_sslv2
| asio::ssl::context::single_dh_use);
context_.use_certificate_chain_file("server.pem");
context_.use_private_key_file("server.pem", asio::ssl::context::pem);
context_.use_tmp_dh_file("dh512.pem");
session* new_session = new session(io_service_, context_);
acceptor_.async_accept(new_session->socket(),
boost::bind(&server::handle_accept, this, new_session,
asio::placeholders::error));
}
void handle_accept(session* new_session, const asio::error& error)
{
if (!error)
{
new_session->start();
new_session = new session(io_service_, context_);
acceptor_.async_accept(new_session->socket(),
boost::bind(&server::handle_accept, this, new_session,
asio::placeholders::error));
}
else
{
delete new_session;
}
}
private:
asio::io_service& io_service_;
asio::ip::tcp::acceptor acceptor_;
asio::ssl::context context_;
};
int main(int argc, char* argv[])
{
try
{
if (argc != 2)
{
std::cerr << "Usage: server <port>\n";
return 1;
}
asio::io_service io_service;
using namespace std;
server s(io_service, atoi(argv[1]));
io_service.run();
}
catch (asio::error& e)
{
std::cerr << e << "\n";
}
catch (std::exception& e)
{
std::cerr << "Exception: " << e.what() << "\n";
}
return 0;
}