monero/contrib/epee/include/net/levin_base.h
moneromooo-monero 7dbf76d0da
Fix an object lifetime bug in net load tests
The commands handler must not be destroyed before the config
object, or we'll be accessing freed memory.

An earlier attempt at using boost::shared_ptr to control object
lifetime turned out to be very invasive, though would be a
better solution in theory.
2017-10-09 16:46:42 +01:00

126 lines
4.2 KiB
C++

// 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_BASE_H_
#define _LEVIN_BASE_H_
#include "net_utils_base.h"
#define LEVIN_SIGNATURE 0x0101010101012101LL //Bender's nightmare
namespace epee
{
namespace levin
{
#pragma pack(push)
#pragma pack(1)
struct bucket_head
{
uint64_t m_signature;
uint64_t m_cb;
bool m_have_to_return_data;
uint32_t m_command;
int32_t m_return_code;
uint32_t m_reservedA; //probably some flags in future
uint32_t m_reservedB; //probably some check sum in future
};
#pragma pack(pop)
#pragma pack(push)
#pragma pack(1)
struct bucket_head2
{
uint64_t m_signature;
uint64_t m_cb;
bool m_have_to_return_data;
uint32_t m_command;
int32_t m_return_code;
uint32_t m_flags;
uint32_t m_protocol_version;
};
#pragma pack(pop)
#define LEVIN_DEFAULT_TIMEOUT_PRECONFIGURED 0
#define LEVIN_DEFAULT_MAX_PACKET_SIZE 100000000 //100MB by default
#define LEVIN_PACKET_REQUEST 0x00000001
#define LEVIN_PACKET_RESPONSE 0x00000002
#define LEVIN_PROTOCOL_VER_0 0
#define LEVIN_PROTOCOL_VER_1 1
template<class t_connection_context = net_utils::connection_context_base>
struct levin_commands_handler
{
virtual int invoke(int command, const std::string& in_buff, std::string& buff_out, t_connection_context& context)=0;
virtual int notify(int command, const std::string& in_buff, t_connection_context& context)=0;
virtual void callback(t_connection_context& context){};
virtual void on_connection_new(t_connection_context& context){};
virtual void on_connection_close(t_connection_context& context){};
virtual ~levin_commands_handler(){}
};
#define LEVIN_OK 0
#define LEVIN_ERROR_CONNECTION -1
#define LEVIN_ERROR_CONNECTION_NOT_FOUND -2
#define LEVIN_ERROR_CONNECTION_DESTROYED -3
#define LEVIN_ERROR_CONNECTION_TIMEDOUT -4
#define LEVIN_ERROR_CONNECTION_NO_DUPLEX_PROTOCOL -5
#define LEVIN_ERROR_CONNECTION_HANDLER_NOT_DEFINED -6
#define LEVIN_ERROR_FORMAT -7
#define DESCRIBE_RET_CODE(code) case code: return #code;
inline
const char* get_err_descr(int err)
{
switch(err)
{
DESCRIBE_RET_CODE(LEVIN_OK);
DESCRIBE_RET_CODE(LEVIN_ERROR_CONNECTION);
DESCRIBE_RET_CODE(LEVIN_ERROR_CONNECTION_NOT_FOUND);
DESCRIBE_RET_CODE(LEVIN_ERROR_CONNECTION_DESTROYED);
DESCRIBE_RET_CODE(LEVIN_ERROR_CONNECTION_TIMEDOUT);
DESCRIBE_RET_CODE(LEVIN_ERROR_CONNECTION_NO_DUPLEX_PROTOCOL);
DESCRIBE_RET_CODE(LEVIN_ERROR_CONNECTION_HANDLER_NOT_DEFINED);
DESCRIBE_RET_CODE(LEVIN_ERROR_FORMAT);
default:
return "unknown code";
}
}
}
}
#endif //_LEVIN_BASE_H_