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298 lines
13 KiB
C++
298 lines
13 KiB
C++
// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the Andrey N. Sabelnikov nor the
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// names of its contributors may be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#pragma once
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#include "portable_storage_template_helper.h"
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#include <boost/utility/string_ref.hpp>
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#include <boost/utility/value_init.hpp>
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#include <functional>
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#include "byte_slice.h"
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#include "span.h"
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#include "net/levin_base.h"
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#undef MONERO_DEFAULT_LOG_CATEGORY
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#define MONERO_DEFAULT_LOG_CATEGORY "net"
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template<typename context_t>
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void on_levin_traffic(const context_t &context, bool initiator, bool sent, bool error, size_t bytes, const char *category);
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template<typename context_t>
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void on_levin_traffic(const context_t &context, bool initiator, bool sent, bool error, size_t bytes, int command);
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namespace
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{
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static const constexpr epee::serialization::portable_storage::limits_t default_levin_limits = {
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8192, // objects
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16384, // fields
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16384, // strings
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};
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}
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namespace epee
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{
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namespace net_utils
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{
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template<class t_arg, class t_result, class t_transport>
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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)
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{
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const boost::uuids::uuid &conn_id = context.m_connection_id;
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typename serialization::portable_storage stg;
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out_struct.store(stg);
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levin::message_writer to_send{16 * 1024};
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std::string buff_to_recv;
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stg.store_to_binary(to_send.buffer);
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int res = transport.invoke(command, std::move(to_send), buff_to_recv, conn_id);
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if( res <=0 )
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{
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LOG_PRINT_L1("Failed to invoke command " << command << " return code " << res);
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return false;
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}
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typename serialization::portable_storage stg_ret;
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if(!stg_ret.load_from_binary(buff_to_recv, &default_levin_limits))
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{
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on_levin_traffic(context, true, false, true, buff_to_recv.size(), command);
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LOG_ERROR("Failed to load_from_binary on command " << command);
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return false;
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}
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on_levin_traffic(context, true, false, false, buff_to_recv.size(), command);
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return result_struct.load(stg_ret);
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}
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template<class t_result, class t_arg, class callback_t, class t_transport>
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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)
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{
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const boost::uuids::uuid &conn_id = context.m_connection_id;
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typename serialization::portable_storage stg;
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const_cast<t_arg&>(out_struct).store(stg);//TODO: add true const support to searilzation
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levin::message_writer to_send{16 * 1024};
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stg.store_to_binary(to_send.buffer);
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int res = transport.invoke_async(command, std::move(to_send), conn_id, [cb, command](int code, const epee::span<const uint8_t> buff, typename t_transport::connection_context& context)->bool
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{
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t_result result_struct = AUTO_VAL_INIT(result_struct);
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if( code <=0 )
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{
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if (!buff.empty())
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on_levin_traffic(context, true, false, true, buff.size(), command);
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LOG_PRINT_L1("Failed to invoke command " << command << " return code " << code);
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cb(code, result_struct, context);
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return false;
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}
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serialization::portable_storage stg_ret;
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if(!stg_ret.load_from_binary(buff, &default_levin_limits))
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{
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on_levin_traffic(context, true, false, true, buff.size(), command);
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LOG_ERROR("Failed to load_from_binary on command " << command);
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cb(LEVIN_ERROR_FORMAT, result_struct, context);
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return false;
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}
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if (!result_struct.load(stg_ret))
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{
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on_levin_traffic(context, true, false, true, buff.size(), command);
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LOG_ERROR("Failed to load result struct on command " << command);
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cb(LEVIN_ERROR_FORMAT, result_struct, context);
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return false;
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}
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on_levin_traffic(context, true, false, false, buff.size(), command);
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cb(code, result_struct, context);
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return true;
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}, inv_timeout);
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if( res <=0 )
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{
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LOG_PRINT_L1("Failed to invoke command " << command << " return code " << res);
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return false;
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}
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return true;
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}
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template<class t_arg, class t_transport>
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bool notify_remote_command2(const typename t_transport::connection_context &context, int command, const t_arg& out_struct, t_transport& transport)
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{
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const boost::uuids::uuid &conn_id = context.m_connection_id;
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serialization::portable_storage stg;
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out_struct.store(stg);
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levin::message_writer to_send;
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stg.store_to_binary(to_send.buffer);
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int res = transport.send(to_send.finalize_notify(command), conn_id);
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if(res <=0 )
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{
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MERROR("Failed to notify command " << command << " return code " << res);
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return false;
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}
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return true;
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}
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//----------------------------------------------------------------------------------------------------
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//----------------------------------------------------------------------------------------------------
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template<class t_owner, class t_in_type, class t_out_type, class t_context, class callback_t>
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int buff_to_t_adapter(int command, const epee::span<const uint8_t> in_buff, byte_stream& buff_out, callback_t cb, t_context& context )
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{
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serialization::portable_storage strg;
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if(!strg.load_from_binary(in_buff, &default_levin_limits))
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{
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on_levin_traffic(context, false, false, true, in_buff.size(), command);
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LOG_ERROR("Failed to load_from_binary in command " << command);
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return -1;
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}
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boost::value_initialized<t_in_type> in_struct;
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boost::value_initialized<t_out_type> out_struct;
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if (!static_cast<t_in_type&>(in_struct).load(strg))
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{
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on_levin_traffic(context, false, false, true, in_buff.size(), command);
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LOG_ERROR("Failed to load in_struct in command " << command);
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return -1;
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}
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on_levin_traffic(context, false, false, false, in_buff.size(), command);
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int res = cb(command, static_cast<t_in_type&>(in_struct), static_cast<t_out_type&>(out_struct), context);
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serialization::portable_storage strg_out;
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static_cast<t_out_type&>(out_struct).store(strg_out);
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if(!strg_out.store_to_binary(buff_out))
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{
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LOG_ERROR("Failed to store_to_binary in command" << command);
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return -1;
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}
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return res;
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}
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template<class t_owner, class t_in_type, class t_context, class callback_t>
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int buff_to_t_adapter(t_owner* powner, int command, const epee::span<const uint8_t> in_buff, callback_t cb, t_context& context)
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{
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serialization::portable_storage strg;
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if(!strg.load_from_binary(in_buff, &default_levin_limits))
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{
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on_levin_traffic(context, false, false, true, in_buff.size(), command);
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LOG_ERROR("Failed to load_from_binary in notify " << command);
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return -1;
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}
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boost::value_initialized<t_in_type> in_struct;
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if (!static_cast<t_in_type&>(in_struct).load(strg))
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{
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on_levin_traffic(context, false, false, true, in_buff.size(), command);
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LOG_ERROR("Failed to load in_struct in notify " << command);
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return -1;
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}
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on_levin_traffic(context, false, false, false, in_buff.size(), command);
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return cb(command, in_struct, context);
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}
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#define CHAIN_LEVIN_INVOKE_MAP2(context_type) \
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int invoke(int command, const epee::span<const uint8_t> in_buff, epee::byte_stream& buff_out, context_type& context) \
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{ \
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bool handled = false; \
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return handle_invoke_map(false, command, in_buff, buff_out, context, handled); \
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}
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#define CHAIN_LEVIN_NOTIFY_MAP2(context_type) \
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int notify(int command, const epee::span<const uint8_t> in_buff, context_type& context) \
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{ \
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bool handled = false; epee::byte_stream fake_str; \
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return handle_invoke_map(true, command, in_buff, fake_str, context, handled); \
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}
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#define CHAIN_LEVIN_INVOKE_MAP() \
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int invoke(int command, const epee::span<const uint8_t> in_buff, epee::byte_stream& buff_out, epee::net_utils::connection_context_base& context) \
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{ \
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bool handled = false; \
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return handle_invoke_map(false, command, in_buff, buff_out, context, handled); \
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}
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#define CHAIN_LEVIN_NOTIFY_MAP() \
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int notify(int command, const epee::span<const uint8_t> in_buff, epee::net_utils::connection_context_base& context) \
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{ \
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bool handled = false; std::string fake_str;\
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return handle_invoke_map(true, command, in_buff, fake_str, context, handled); \
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}
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#define CHAIN_LEVIN_NOTIFY_STUB() \
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int notify(int command, const epee::span<const uint8_t> in_buff, epee::net_utils::connection_context_base& context) \
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{ \
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return -1; \
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}
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#define BEGIN_INVOKE_MAP2(owner_type) \
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template <class t_context> int handle_invoke_map(bool is_notify, int command, const epee::span<const uint8_t> in_buff, epee::byte_stream& buff_out, t_context& context, bool& handled) \
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{ \
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try { \
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typedef owner_type internal_owner_type_name;
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#define HANDLE_INVOKE2(command_id, func, type_name_in, typename_out) \
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if(!is_notify && command_id == command) \
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{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);}
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#define HANDLE_INVOKE_T2(COMMAND, func) \
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if(!is_notify && COMMAND::ID == command) \
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{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);}
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#define HANDLE_NOTIFY2(command_id, func, type_name_in) \
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if(is_notify && command_id == command) \
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{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);}
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#define HANDLE_NOTIFY_T2(NOTIFY, func) \
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if(is_notify && NOTIFY::ID == command) \
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{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);}
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#define CHAIN_INVOKE_MAP2(func) \
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{ \
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int res = func(is_notify, command, in_buff, buff_out, context, handled); \
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if(handled) \
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return res; \
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}
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#define CHAIN_INVOKE_MAP_TO_OBJ2(obj) \
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{ \
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int res = obj.handle_invoke_map(is_notify, command, in_buff, buff_out, context, handled); \
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if(handled) \
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return res; \
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}
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#define CHAIN_INVOKE_MAP_TO_OBJ_FORCE_CONTEXT(obj, context_type) \
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{ \
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int res = obj.handle_invoke_map(is_notify, command, in_buff, buff_out, static_cast<context_type>(context), handled); \
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if(handled) return res; \
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}
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#define END_INVOKE_MAP2() \
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LOG_ERROR("Unknown command:" << command); \
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on_levin_traffic(context, false, false, true, in_buff.size(), "invalid-command"); \
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return LEVIN_ERROR_CONNECTION_HANDLER_NOT_DEFINED; \
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} \
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catch (const std::exception &e) { \
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MERROR("Error in handle_invoke_map: " << e.what()); \
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return LEVIN_ERROR_CONNECTION_TIMEDOUT; /* seems kinda appropriate */ \
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} \
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}
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}
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}
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