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monero/contrib/epee/include/storages/levin_abstract_invoke2.h

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// 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.
//
#pragma once
#include "portable_storage_template_helper.h"
#include <boost/utility/string_ref.hpp>
#include <boost/utility/value_init.hpp>
#include <functional>
#include "byte_slice.h"
#include "span.h"
#include "net/levin_base.h"
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "net"
namespace
{
template<typename context_t>
void on_levin_traffic(const context_t &context, bool initiator, bool sent, bool error, size_t bytes, const char *category)
{
MCINFO("net.p2p.traffic", context << bytes << " bytes " << (sent ? "sent" : "received") << (error ? "/corrupt" : "")
<< " for category " << category << " initiated by " << (initiator ? "us" : "peer"));
}
template<typename context_t>
void on_levin_traffic(const context_t &context, bool initiator, bool sent, bool error, size_t bytes, int command)
{
char buf[32];
snprintf(buf, sizeof(buf), "command-%u", command);
return on_levin_traffic(context, initiator, sent, error, bytes, buf);
}
static const constexpr epee::serialization::portable_storage::limits_t default_levin_limits = {
8192, // objects
16384, // fields
16384, // strings
};
}
namespace epee
{
namespace net_utils
{
#if 0
template<class t_arg, class t_result, class t_transport>
bool invoke_remote_command2(int command, const t_arg& out_struct, t_result& result_struct, t_transport& transport)
{
if(!transport.is_connected())
return false;
serialization::portable_storage stg;
out_struct.store(stg);
std::string buff_to_send, buff_to_recv;
stg.store_to_binary(buff_to_send);
int res = transport.invoke(command, buff_to_send, buff_to_recv);
if( res <=0 )
{
MERROR("Failed to invoke command " << command << " return code " << res);
return false;
}
serialization::portable_storage stg_ret;
if(!stg_ret.load_from_binary(buff_to_recv, &default_levin_limits))
{
LOG_ERROR("Failed to load_from_binary on command " << command);
return false;
}
return result_struct.load(stg_ret);
}
template<class t_arg, class t_transport>
bool notify_remote_command2(int command, const t_arg& out_struct, t_transport& transport)
{
if(!transport.is_connected())
return false;
serialization::portable_storage stg;
out_struct.store(&stg);
std::string buff_to_send;
stg.store_to_binary(buff_to_send);
int res = transport.notify(command, buff_to_send);
if(res <=0 )
{
LOG_ERROR("Failed to notify command " << command << " return code " << res);
return false;
}
return true;
}
#endif
template<class t_arg, class t_result, class t_transport>
bool invoke_remote_command2(const epee::net_utils::connection_context_base context, int command, const t_arg& out_struct, t_result& result_struct, t_transport& transport)
{
const boost::uuids::uuid &conn_id = context.m_connection_id;
typename serialization::portable_storage stg;
out_struct.store(stg);
byte_slice buff_to_send;
std::string buff_to_recv;
stg.store_to_binary(buff_to_send, 16 * 1024);
on_levin_traffic(context, true, true, false, buff_to_send.size(), command);
int res = transport.invoke(command, boost::string_ref{reinterpret_cast<const char*>(buff_to_send.data()), buff_to_send.size()}, buff_to_recv, conn_id);
if( res <=0 )
{
LOG_PRINT_L1("Failed to invoke command " << command << " return code " << res);
return false;
}
typename serialization::portable_storage stg_ret;
if(!stg_ret.load_from_binary(buff_to_recv, &default_levin_limits))
{
on_levin_traffic(context, true, false, true, buff_to_recv.size(), command);
LOG_ERROR("Failed to load_from_binary on command " << command);
return false;
}
on_levin_traffic(context, true, false, false, buff_to_recv.size(), command);
return result_struct.load(stg_ret);
}
template<class t_result, class t_arg, class callback_t, class t_transport>
bool async_invoke_remote_command2(const epee::net_utils::connection_context_base &context, int command, const t_arg& out_struct, t_transport& transport, const callback_t &cb, size_t inv_timeout = LEVIN_DEFAULT_TIMEOUT_PRECONFIGURED)
{
const boost::uuids::uuid &conn_id = context.m_connection_id;
typename serialization::portable_storage stg;
const_cast<t_arg&>(out_struct).store(stg);//TODO: add true const support to searilzation
byte_slice buff_to_send;
stg.store_to_binary(buff_to_send, 16 * 1024);
on_levin_traffic(context, true, true, false, buff_to_send.size(), command);
int res = transport.invoke_async(command, epee::to_span(buff_to_send), conn_id, [cb, command](int code, const epee::span<const uint8_t> buff, typename t_transport::connection_context& context)->bool
{
t_result result_struct = AUTO_VAL_INIT(result_struct);
if( code <=0 )
{
if (!buff.empty())
on_levin_traffic(context, true, false, true, buff.size(), command);
LOG_PRINT_L1("Failed to invoke command " << command << " return code " << code);
cb(code, result_struct, context);
return false;
}
serialization::portable_storage stg_ret;
if(!stg_ret.load_from_binary(buff, &default_levin_limits))
{
on_levin_traffic(context, true, false, true, buff.size(), command);
LOG_ERROR("Failed to load_from_binary on command " << command);
cb(LEVIN_ERROR_FORMAT, result_struct, context);
return false;
}
if (!result_struct.load(stg_ret))
{
on_levin_traffic(context, true, false, true, buff.size(), command);
LOG_ERROR("Failed to load result struct on command " << command);
cb(LEVIN_ERROR_FORMAT, result_struct, context);
return false;
}
on_levin_traffic(context, true, false, false, buff.size(), command);
cb(code, result_struct, context);
return true;
}, inv_timeout);
if( res <=0 )
{
LOG_PRINT_L1("Failed to invoke command " << command << " return code " << res);
return false;
}
return true;
}
template<class t_arg, class t_transport>
bool notify_remote_command2(const typename t_transport::connection_context &context, int command, const t_arg& out_struct, t_transport& transport)
{
const boost::uuids::uuid &conn_id = context.m_connection_id;
serialization::portable_storage stg;
out_struct.store(stg);
byte_slice buff_to_send;
stg.store_to_binary(buff_to_send);
on_levin_traffic(context, true, true, false, buff_to_send.size(), command);
int res = transport.notify(command, epee::to_span(buff_to_send), conn_id);
if(res <=0 )
{
MERROR("Failed to notify command " << command << " return code " << res);
return false;
}
return true;
}
//----------------------------------------------------------------------------------------------------
//----------------------------------------------------------------------------------------------------
template<class t_owner, class t_in_type, class t_out_type, class t_context, class callback_t>
int buff_to_t_adapter(int command, const epee::span<const uint8_t> in_buff, byte_slice& buff_out, callback_t cb, t_context& context )
{
serialization::portable_storage strg;
if(!strg.load_from_binary(in_buff, &default_levin_limits))
{
on_levin_traffic(context, false, false, true, in_buff.size(), command);
LOG_ERROR("Failed to load_from_binary in command " << command);
return -1;
}
boost::value_initialized<t_in_type> in_struct;
boost::value_initialized<t_out_type> out_struct;
if (!static_cast<t_in_type&>(in_struct).load(strg))
{
on_levin_traffic(context, false, false, true, in_buff.size(), command);
LOG_ERROR("Failed to load in_struct in command " << command);
return -1;
}
on_levin_traffic(context, false, false, false, in_buff.size(), command);
int res = cb(command, static_cast<t_in_type&>(in_struct), static_cast<t_out_type&>(out_struct), context);
serialization::portable_storage strg_out;
static_cast<t_out_type&>(out_struct).store(strg_out);
if(!strg_out.store_to_binary(buff_out, 32 * 1024))
{
LOG_ERROR("Failed to store_to_binary in command" << command);
return -1;
}
on_levin_traffic(context, false, true, false, buff_out.size(), command);
return res;
}
template<class t_owner, class t_in_type, class t_context, class callback_t>
int buff_to_t_adapter(t_owner* powner, int command, const epee::span<const uint8_t> in_buff, callback_t cb, t_context& context)
{
serialization::portable_storage strg;
if(!strg.load_from_binary(in_buff, &default_levin_limits))
{
on_levin_traffic(context, false, false, true, in_buff.size(), command);
LOG_ERROR("Failed to load_from_binary in notify " << command);
return -1;
}
boost::value_initialized<t_in_type> in_struct;
if (!static_cast<t_in_type&>(in_struct).load(strg))
{
on_levin_traffic(context, false, false, true, in_buff.size(), command);
LOG_ERROR("Failed to load in_struct in notify " << command);
return -1;
}
on_levin_traffic(context, false, false, false, in_buff.size(), command);
return cb(command, in_struct, context);
}
#define CHAIN_LEVIN_INVOKE_MAP2(context_type) \
int invoke(int command, const epee::span<const uint8_t> in_buff, epee::byte_slice& buff_out, context_type& context) \
{ \
bool handled = false; \
return handle_invoke_map(false, command, in_buff, buff_out, context, handled); \
}
#define CHAIN_LEVIN_NOTIFY_MAP2(context_type) \
int notify(int command, const epee::span<const uint8_t> in_buff, context_type& context) \
{ \
bool handled = false; epee::byte_slice fake_str; \
return handle_invoke_map(true, command, in_buff, fake_str, context, handled); \
}
#define CHAIN_LEVIN_INVOKE_MAP() \
int invoke(int command, const epee::span<const uint8_t> in_buff, epee::byte_slice& buff_out, epee::net_utils::connection_context_base& context) \
{ \
bool handled = false; \
return handle_invoke_map(false, command, in_buff, buff_out, context, handled); \
}
#define CHAIN_LEVIN_NOTIFY_MAP() \
int notify(int command, const epee::span<const uint8_t> in_buff, epee::net_utils::connection_context_base& context) \
{ \
bool handled = false; std::string fake_str;\
return handle_invoke_map(true, command, in_buff, fake_str, context, handled); \
}
#define CHAIN_LEVIN_NOTIFY_STUB() \
int notify(int command, const epee::span<const uint8_t> in_buff, epee::net_utils::connection_context_base& context) \
{ \
return -1; \
}
#define BEGIN_INVOKE_MAP2(owner_type) \
template <class t_context> int handle_invoke_map(bool is_notify, int command, const epee::span<const uint8_t> in_buff, epee::byte_slice& buff_out, t_context& context, bool& handled) \
{ \
try { \
typedef owner_type internal_owner_type_name;
#define HANDLE_INVOKE2(command_id, func, type_name_in, typename_out) \
if(!is_notify && command_id == command) \
{handled=true;return epee::net_utils::buff_to_t_adapter<internal_owner_type_name, type_name_in, typename_out>(this, command, in_buff, buff_out, std::bind(func, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3, std::placeholders::_4), context);}
#define HANDLE_INVOKE_T2(COMMAND, func) \
if(!is_notify && COMMAND::ID == command) \
{handled=true;return epee::net_utils::buff_to_t_adapter<internal_owner_type_name, typename COMMAND::request, typename COMMAND::response>(command, in_buff, buff_out, std::bind(func, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3, std::placeholders::_4), context);}
#define HANDLE_NOTIFY2(command_id, func, type_name_in) \
if(is_notify && command_id == command) \
{handled=true;return epee::net_utils::buff_to_t_adapter<internal_owner_type_name, type_name_in>(this, command, in_buff, std::bind(func, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3), context);}
#define HANDLE_NOTIFY_T2(NOTIFY, func) \
if(is_notify && NOTIFY::ID == command) \
{handled=true;return epee::net_utils::buff_to_t_adapter<internal_owner_type_name, typename NOTIFY::request>(this, command, in_buff, std::bind(func, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3), context);}
#define CHAIN_INVOKE_MAP2(func) \
{ \
int res = func(is_notify, command, in_buff, buff_out, context, handled); \
if(handled) \
return res; \
}
#define CHAIN_INVOKE_MAP_TO_OBJ2(obj) \
{ \
int res = obj.handle_invoke_map(is_notify, command, in_buff, buff_out, context, handled); \
if(handled) \
return res; \
}
#define CHAIN_INVOKE_MAP_TO_OBJ_FORCE_CONTEXT(obj, context_type) \
{ \
int res = obj.handle_invoke_map(is_notify, command, in_buff, buff_out, static_cast<context_type>(context), handled); \
if(handled) return res; \
}
#define END_INVOKE_MAP2() \
LOG_ERROR("Unknown command:" << command); \
on_levin_traffic(context, false, false, true, in_buff.size(), "invalid-command"); \
return LEVIN_ERROR_CONNECTION_HANDLER_NOT_DEFINED; \
} \
catch (const std::exception &e) { \
MERROR("Error in handle_invoke_map: " << e.what()); \
return LEVIN_ERROR_CONNECTION_TIMEDOUT; /* seems kinda appropriate */ \
} \
}
}
}
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