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/*
Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "digester.h"
#include "io_context.h"
#include <boost/asio.hpp>
#include <boost/scoped_ptr.hpp>
/** @class Socket
* @brief A class to wrap a boost::asio::ip::tcp::socket with some things
* that are useful for DCP-o-matic.
*
* This class wraps some things that I could not work out how to do easily with boost;
* most notably, sync read/write calls with timeouts.
*/
class Socket
{
public:
explicit Socket (int timeout = 30);
Socket (Socket const&) = delete;
Socket& operator= (Socket const&) = delete;
/** @return Our underlying socket */
boost::asio::ip::tcp::socket& socket () {
return _socket;
}
void set_send_buffer_size (int size);
void connect(std::string host_name, int port);
void connect(boost::asio::ip::address address, int port);
void write (uint32_t n);
void write (uint8_t const * data, int size);
void write(std::string const& str);
void read (uint8_t* data, int size);
uint32_t read_uint32 ();
void set_deadline_from_now(int seconds);
void run();
void close();
bool is_open() const {
return _socket.is_open();
}
class ReadDigestScope
{
public:
ReadDigestScope (std::shared_ptr<Socket> socket);
bool check ();
private:
std::weak_ptr<Socket> _socket;
};
/** After one of these is created everything that is sent from the socket will be
* added to a digest. When the DigestScope is destroyed the digest will be sent
* from the socket.
*/
class WriteDigestScope
{
public:
WriteDigestScope (std::shared_ptr<Socket> socket);
~WriteDigestScope ();
private:
std::weak_ptr<Socket> _socket;
};
private:
friend class DigestScope;
void check ();
void start_read_digest ();
bool check_read_digest ();
void start_write_digest ();
void finish_write_digest ();
void connect(boost::asio::ip::tcp::endpoint endpoint);
#ifdef DCPOMATIC_HAVE_BOOST_ASIO_IP_BASIC_RESOLVER_RESULTS
void connect(boost::asio::ip::basic_resolver_results<boost::asio::ip::tcp> endpoints);
#endif
dcpomatic::io_context _io_context;
boost::asio::deadline_timer _deadline;
boost::asio::ip::tcp::socket _socket;
int _timeout;
boost::scoped_ptr<Digester> _read_digester;
boost::scoped_ptr<Digester> _write_digester;
boost::optional<int> _send_buffer_size;
};
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