98 lines
2.6 KiB
C
98 lines
2.6 KiB
C
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// Copyright (c) 2012-2015, The CryptoNote developers, The Bytecoin developers
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//
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// This file is part of Bytecoin.
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//
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// Bytecoin is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Bytecoin is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with Bytecoin. If not, see <http://www.gnu.org/licenses/>.
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#pragma once
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#include "misc_log_ex.h"
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#include "storages/portable_storage.h"
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#include "storages/portable_storage_from_bin.h"
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#include "storages/portable_storage_to_bin.h"
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namespace System {
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class TcpConnection;
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}
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namespace CryptoNote {
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enum class LevinError: int32_t {
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OK = 0,
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ERROR_CONNECTION = -1,
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ERROR_CONNECTION_NOT_FOUND = -2,
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ERROR_CONNECTION_DESTROYED = -3,
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ERROR_CONNECTION_TIMEDOUT = -4,
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ERROR_CONNECTION_NO_DUPLEX_PROTOCOL = -5,
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ERROR_CONNECTION_HANDLER_NOT_DEFINED = -6,
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ERROR_FORMAT = -7,
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};
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class LevinProtocol {
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public:
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LevinProtocol(System::TcpConnection& connection);
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template <typename Req, typename Resp>
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void invoke(uint32_t command, const Req& req, Resp& resp, bool readResponse = true) {
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decode(sendBuf(command, encode(req), true, readResponse), resp);
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}
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template <typename Req>
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void notify(uint32_t command, const Req& req, int) {
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sendBuf(command, encode(req), false, false);
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}
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struct Command {
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uint32_t command;
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bool isNotify;
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bool isResponse;
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std::string buf;
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bool needReply() const {
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return !(isNotify || isResponse);
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}
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};
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bool readCommand(Command& cmd);
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std::string sendBuf(uint32_t command, const std::string& out, bool needResponse, bool readResponse = false);
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void sendReply(uint32_t command, const std::string& out, int32_t returnCode);
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template <typename T>
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static bool decode(const std::string& buf, T& value) {
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epee::serialization::portable_storage stg;
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if (!stg.load_from_binary(buf)) {
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return false;
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}
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return value.load(stg);
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}
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template <typename T>
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static std::string encode(const T& value) {
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std::string buf;
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epee::serialization::portable_storage stg;
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value.store(stg);
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stg.store_to_binary(buf);
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return buf;
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}
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private:
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bool readStrict(void* ptr, size_t size);
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System::TcpConnection& m_conn;
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};
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}
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