// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the Andrey N. Sabelnikov nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
#ifndef _ABSTRACT_TCP_SERVER2_H_
#define _ABSTRACT_TCP_SERVER2_H_
#include <boost/asio.hpp>
#include <string>
#include <vector>
#include <boost/noncopyable.hpp>
#include <boost/shared_ptr.hpp>
#include <atomic>
#include <boost/asio.hpp>
#include <boost/array.hpp>
#include <boost/noncopyable.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <boost/interprocess/detail/atomic.hpp>
#include <boost/thread/thread.hpp>
#include "net_utils_base.h"
#include "syncobj.h"
#define ABSTRACT_SERVER_SEND_QUE_MAX_COUNT 1000
namespace epee
{
namespace net_utils
{
struct i_connection_filter
{
virtual bool is_remote_ip_allowed(uint32_t adress)=0;
protected:
virtual ~i_connection_filter(){}
};
/************************************************************************/
/* */
/************************************************************************/
/// Represents a single connection from a client.
template<class t_protocol_handler>
class connection
: public boost::enable_shared_from_this<connection<t_protocol_handler> >,
private boost::noncopyable,
public i_service_endpoint
{
public:
typedef typename t_protocol_handler::connection_context t_connection_context;
/// Construct a connection with the given io_service.
explicit connection(boost::asio::io_service& io_service,
typename t_protocol_handler::config_type& config, volatile uint32_t& sock_count, i_connection_filter * &pfilter);
virtual ~connection();
/// Get the socket associated with the connection.
boost::asio::ip::tcp::socket& socket();
/// Start the first asynchronous operation for the connection.
bool start(bool is_income, bool is_multithreaded);
void get_context(t_connection_context& context_){context_ = context;}
void call_back_starter();
private:
//----------------- i_service_endpoint ---------------------
virtual bool do_send(const void* ptr, size_t cb);
virtual bool close();
virtual bool call_run_once_service_io();
virtual bool request_callback();
virtual boost::asio::io_service& get_io_service();
virtual bool add_ref();
virtual bool release();
//------------------------------------------------------
boost::shared_ptr<connection<t_protocol_handler> > safe_shared_from_this();
bool shutdown();
/// Handle completion of a read operation.
void handle_read(const boost::system::error_code& e,
std::size_t bytes_transferred);
/// Handle completion of a write operation.
void handle_write(const boost::system::error_code& e, size_t cb);
/// Strand to ensure the connection's handlers are not called concurrently.
boost::asio::io_service::strand strand_;
/// Socket for the connection.
boost::asio::ip::tcp::socket socket_;
/// Buffer for incoming data.
boost::array<char, 8192> buffer_;
t_connection_context context;
volatile uint32_t m_want_close_connection;
std::atomic<bool> m_was_shutdown;
critical_section m_send_que_lock;
std::list<std::string> m_send_que;
volatile uint32_t& m_ref_sockets_count;
i_connection_filter* &m_pfilter;
volatile bool m_is_multithreaded;
//this should be the last one, because it could be wait on destructor, while other activities possible on other threads
t_protocol_handler m_protocol_handler;
//typename t_protocol_handler::config_type m_dummy_config;
std::list<boost::shared_ptr<connection<t_protocol_handler> > > m_self_refs; // add_ref/release support
critical_section m_self_refs_lock;
};
/************************************************************************/
/* */
/************************************************************************/
template<class t_protocol_handler>
class boosted_tcp_server
: private boost::noncopyable
{
public:
typedef boost::shared_ptr<connection<t_protocol_handler> > connection_ptr;
typedef typename t_protocol_handler::connection_context t_connection_context;
/// Construct the server to listen on the specified TCP address and port, and
/// serve up files from the given directory.
boosted_tcp_server();
explicit boosted_tcp_server(boost::asio::io_service& external_io_service);
~boosted_tcp_server();
bool init_server(uint32_t port, const std::string address = "0.0.0.0");
bool init_server(const std::string port, const std::string& address = "0.0.0.0");
/// Run the server's io_service loop.
bool run_server(size_t threads_count, bool wait = true, const boost::thread::attributes& attrs = boost::thread::attributes());
/// wait for service workers stop
bool timed_wait_server_stop(uint64_t wait_mseconds);
/// Stop the server.
void send_stop_signal();
bool is_stop_signal_sent();
void set_threads_prefix(const std::string& prefix_name);
bool deinit_server(){return true;}
size_t get_threads_count(){return m_threads_count;}
void set_connection_filter(i_connection_filter* pfilter);
bool connect(const std::string& adr, const std::string& port, uint32_t conn_timeot, t_connection_context& cn, const std::string& bind_ip = "0.0.0.0");
template<class t_callback>
bool connect_async(const std::string& adr, const std::string& port, uint32_t conn_timeot, t_callback cb, const std::string& bind_ip = "0.0.0.0");
typename t_protocol_handler::config_type& get_config_object(){return m_config;}
int get_binded_port(){return m_port;}
boost::asio::io_service& get_io_service(){return io_service_;}
struct idle_callback_conext_base
{
virtual ~idle_callback_conext_base(){}
virtual bool call_handler(){return true;}
idle_callback_conext_base(boost::asio::io_service& io_serice):
m_timer(io_serice)
{}
boost::asio::deadline_timer m_timer;
uint64_t m_period;
};
template <class t_handler>
struct idle_callback_conext: public idle_callback_conext_base
{
idle_callback_conext(boost::asio::io_service& io_serice, t_handler& h, uint64_t period):
idle_callback_conext_base(io_serice),
m_handler(h)
{this->m_period = period;}
t_handler m_handler;
virtual bool call_handler()
{
return m_handler();
}
};
template<class t_handler>
bool add_idle_handler(t_handler t_callback, uint64_t timeout_ms)
{
boost::shared_ptr<idle_callback_conext_base> ptr(new idle_callback_conext<t_handler>(io_service_, t_callback, timeout_ms));
//needed call handler here ?...
ptr->m_timer.expires_from_now(boost::posix_time::milliseconds(ptr->m_period));
ptr->m_timer.async_wait(boost::bind(&boosted_tcp_server<t_protocol_handler>::global_timer_handler, this, ptr));
return true;
}
bool global_timer_handler(/*const boost::system::error_code& err, */boost::shared_ptr<idle_callback_conext_base> ptr)
{
//if handler return false - he don't want to be called anymore
if(!ptr->call_handler())
return true;
ptr->m_timer.expires_from_now(boost::posix_time::milliseconds(ptr->m_period));
ptr->m_timer.async_wait(boost::bind(&boosted_tcp_server<t_protocol_handler>::global_timer_handler, this, ptr));
return true;
}
template<class t_handler>
bool async_call(t_handler t_callback)
{
io_service_.post(t_callback);
return true;
}
protected:
typename t_protocol_handler::config_type m_config;
private:
/// Run the server's io_service loop.
bool worker_thread();
/// Handle completion of an asynchronous accept operation.
void handle_accept(const boost::system::error_code& e);
bool is_thread_worker();
/// The io_service used to perform asynchronous operations.
std::unique_ptr<boost::asio::io_service> m_io_service_local_instance;
boost::asio::io_service& io_service_;
/// Acceptor used to listen for incoming connections.
boost::asio::ip::tcp::acceptor acceptor_;
/// The next connection to be accepted.
connection_ptr new_connection_;
std::atomic<bool> m_stop_signal_sent;
uint32_t m_port;
volatile uint32_t m_sockets_count;
std::string m_address;
std::string m_thread_name_prefix;
size_t m_threads_count;
i_connection_filter* m_pfilter;
std::vector<boost::shared_ptr<boost::thread> > m_threads;
boost::thread::id m_main_thread_id;
critical_section m_threads_lock;
volatile uint32_t m_thread_index;
};
}
}
#include "abstract_tcp_server2.inl"
#endif
