// 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 _LEVIN_CP_SERVER_H_
#define _LEVIN_CP_SERVER_H_
#include <winsock2.h>
#include <rpc.h>
#include <string>
#include <map>
#include <boost/shared_ptr.hpp>
#include "misc_log_ex.h"
//#include "threads_helper.h"
#include "syncobj.h"
#define ENABLE_PROFILING
#include "profile_tools.h"
#include "net_utils_base.h"
#include "pragma_comp_defs.h"
#define LEVIN_DEFAULT_DATA_BUFF_SIZE 2000
namespace epee
{
namespace net_utils
{
template<class TProtocol>
class cp_server_impl//: public abstract_handler
{
public:
cp_server_impl(/*abstract_handler* phandler = NULL*/);
virtual ~cp_server_impl();
bool init_server(int port_no);
bool deinit_server();
bool run_server(int threads_count = 0);
bool send_stop_signal();
bool is_stop_signal();
virtual bool on_net_idle(){return true;}
size_t get_active_connections_num();
typename TProtocol::config_type& get_config_object(){return m_config;}
private:
enum overlapped_operation_type
{
op_type_recv,
op_type_send,
op_type_stop
};
struct io_data_base
{
OVERLAPPED m_overlapped;
WSABUF DataBuf;
overlapped_operation_type m_op_type;
DWORD TotalBuffBytes;
volatile LONG m_is_in_use;
char Buffer[1];
};
PRAGMA_WARNING_PUSH
PRAGMA_WARNING_DISABLE_VS(4355)
template<class TProtocol>
struct connection: public net_utils::i_service_endpoint
{
connection(typename TProtocol::config_type& ref_config):m_sock(INVALID_SOCKET), m_tprotocol_handler(this, ref_config, context), m_psend_data(NULL), m_precv_data(NULL), m_asked_to_shutdown(0), m_connection_shutwoned(0)
{
}
//connection():m_sock(INVALID_SOCKET), m_tprotocol_handler(this, m_dummy_config, context), m_psend_data(NULL), m_precv_data(NULL), m_asked_to_shutdown(0), m_connection_shutwoned(0)
//{
//}
connection<TProtocol>& operator=(const connection<TProtocol>& obj)
{
return *this;
}
bool init_buffers()
{
m_psend_data = (io_data_base*)new char[sizeof(io_data_base) + LEVIN_DEFAULT_DATA_BUFF_SIZE-1];
m_psend_data->TotalBuffBytes = LEVIN_DEFAULT_DATA_BUFF_SIZE;
m_precv_data = (io_data_base*)new char[sizeof(io_data_base) + LEVIN_DEFAULT_DATA_BUFF_SIZE-1];
m_precv_data->TotalBuffBytes = LEVIN_DEFAULT_DATA_BUFF_SIZE;
return true;
}
bool query_shutdown()
{
if(!::InterlockedCompareExchange(&m_asked_to_shutdown, 1, 0))
{
m_psend_data->m_op_type = op_type_stop;
::PostQueuedCompletionStatus(m_completion_port, 0, (ULONG_PTR)this, &m_psend_data->m_overlapped);
}
return true;
}
//bool set_config(typename TProtocol::config_type& config)
//{
// this->~connection();
// new(this) connection<TProtocol>(config);
// return true;
//}
~connection()
{
if(m_psend_data)
delete m_psend_data;
if(m_precv_data)
delete m_precv_data;
}
virtual bool handle_send(const void* ptr, size_t cb)
{
PROFILE_FUNC("[handle_send]");
if(m_psend_data->TotalBuffBytes < cb)
resize_send_buff((DWORD)cb);
ZeroMemory(&m_psend_data->m_overlapped, sizeof(OVERLAPPED));
m_psend_data->DataBuf.len = (u_long)cb;//m_psend_data->TotalBuffBytes;
m_psend_data->DataBuf.buf = m_psend_data->Buffer;
memcpy(m_psend_data->DataBuf.buf, ptr, cb);
m_psend_data->m_op_type = op_type_send;
InterlockedExchange(&m_psend_data->m_is_in_use, 1);
DWORD bytes_sent = 0;
DWORD flags = 0;
int res = 0;
{
PROFILE_FUNC("[handle_send] ::WSASend");
res = ::WSASend(m_sock, &(m_psend_data->DataBuf), 1, &bytes_sent, flags, &(m_psend_data->m_overlapped), NULL);
}
if(res == SOCKET_ERROR )
{
int err = ::WSAGetLastError();
if(WSA_IO_PENDING == err )
return true;
}
LOG_ERROR("BIG FAIL: WSASend error code not correct, res=" << res << " last_err=" << err);
::InterlockedExchange(&m_psend_data->m_is_in_use, 0);
query_shutdown();
//closesocket(m_psend_data);
return false;
}else if(0 == res)
{
::InterlockedExchange(&m_psend_data->m_is_in_use, 0);
if(!bytes_sent || bytes_sent != cb)
{
int err = ::WSAGetLastError();
LOG_ERROR("BIG FAIL: WSASend immediatly complete? but bad results, res=" << res << " last_err=" << err);
query_shutdown();
return false;
}else
{
return true;
}
}
return true;
}
bool resize_send_buff(DWORD new_size)
{
if(m_psend_data->TotalBuffBytes >= new_size)
return true;
delete m_psend_data;
m_psend_data = (io_data_base*)new char[sizeof(io_data_base) + new_size-1];
m_psend_data->TotalBuffBytes = new_size;
LOG_PRINT("Connection buffer resized up to " << new_size, LOG_LEVEL_3);
return true;
}
SOCKET m_sock;
net_utils::connection_context_base context;
TProtocol m_tprotocol_handler;
typename TProtocol::config_type m_dummy_config;
io_data_base* m_precv_data;
io_data_base* m_psend_data;
HANDLE m_completion_port;
volatile LONG m_asked_to_shutdown;
volatile LONG m_connection_shutwoned;
};
PRAGMA_WARNING_POP
bool worker_thread_member();
static unsigned CALLBACK worker_thread(void* param);
bool add_new_connection(SOCKET new_sock, long ip_from, int port_from);
bool shutdown_connection(connection<TProtocol>* pconn);
typedef std::map<SOCKET, boost::shared_ptr<connection<TProtocol> > > connections_container;
SOCKET m_listen_socket;
HANDLE m_completion_port;
connections_container m_connections;
critical_section m_connections_lock;
int m_port;
volatile LONG m_stop;
//abstract_handler* m_phandler;
bool m_initialized;
volatile LONG m_worker_thread_counter;
typename TProtocol::config_type m_config;
};
}
}
#include "abstract_tcp_server_cp.inl"
#endif //_LEVIN_SERVER_H_
