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/*
* anytun
*
* The secure anycast tunneling protocol (satp) defines a protocol used
* for communication between any combination of unicast and anycast
* tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
* mode and allows tunneling of every ETHER TYPE protocol (e.g.
* ethernet, ip, arp ...). satp directly includes cryptography and
* message authentication based on the methodes used by SRTP. It is
* intended to deliver a generic, scaleable and secure solution for
* tunneling and relaying of packets of any protocol.
*
*
* Copyright (C) 2007-2008 Othmar Gsenger, Erwin Nindl,
* Christian Pointner <satp@wirdorange.org>
*
* This file is part of Anytun.
*
* Anytun is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* Anytun is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with anytun. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _RESOLVER_H_
#define _RESOLVER_H_
#include <queue>
#include <boost/asio.hpp>
#include <boost/function.hpp>
#include "threadUtils.hpp"
template<class Proto>
class ResolveHandler
{
public:
ResolveHandler(const std::string& addr, const std::string& port, boost::function<void (boost::asio::ip::basic_endpoint<Proto>)> const& onResolve);
void operator()(const boost::system::error_code& e, const boost::asio::ip::basic_resolver_iterator<Proto>);
private:
std::string addr_;
std::string port_;
boost::function<void (boost::asio::ip::basic_endpoint<Proto>)> callback_;
};
typedef ResolveHandler<boost::asio::ip::udp> UdpResolveHandler;
typedef ResolveHandler<boost::asio::ip::tcp> TcpResolveHandler;
class Resolver
{
public:
static Resolver& instance();
void init();
void run();
void resolveUdp(const std::string& addr, const std::string& port, boost::function<void (boost::asio::ip::udp::endpoint)> const& onResolve);
void resolveTcp(const std::string& addr, const std::string& port, boost::function<void (boost::asio::ip::tcp::endpoint)> const& onResolve);
private:
Resolver();
~Resolver();
Resolver(const Resolver &r);
void operator=(const Resolver &r);
static Resolver* inst;
static ::Mutex instMutex;
class instanceCleaner {
public: ~instanceCleaner() {
if(Resolver::inst != 0)
delete Resolver::inst;
}
};
friend class instanceCleaner;
boost::asio::io_service io_service_;
boost::asio::ip::udp::resolver udp_resolver_;
boost::asio::ip::tcp::resolver tcp_resolver_;
boost::thread* thread_;
};
extern Resolver& gResolver;
#endif
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