/* * Copyright (C) 2019 Sony Interactive Entertainment Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS CONTRIBUTORS * 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. */ #include "config.h" #include "RemoteInspectorMessageParser.h" #include <wtf/ByteOrder.h> #if ENABLE(REMOTE_INSPECTOR) namespace Inspector { /* | <--- one message for send / didReceiveData ---> | +--------------+----------------------------------+-------------- | size | data | (next message) | 4byte (NBO) | variable length | +--------------+----------------------------------+-------------- | <------------ size ------------> | */ MessageParser::MessageParser(Function<void(Vector<uint8_t>&&)>&& listener) : m_listener(WTFMove(listener)) { } Vector<uint8_t> MessageParser::createMessage(const uint8_t* data, size_t size) { if (!data || !size || size > UINT_MAX) return Vector<uint8_t>(); auto messageBuffer = Vector<uint8_t>(size + sizeof(uint32_t)); uint32_t uintSize = static_cast<uint32_t>(size); uint32_t nboSize = htonl(uintSize); memcpy(&messageBuffer[0], &nboSize, sizeof(uint32_t)); memcpy(&messageBuffer[sizeof(uint32_t)], data, uintSize); return messageBuffer; } void MessageParser::pushReceivedData(const uint8_t* data, size_t size) { if (!data || !size || !m_listener) return; m_buffer.reserveCapacity(m_buffer.size() + size); m_buffer.append(data, size); if (!parse()) clearReceivedData(); } void MessageParser::clearReceivedData() { m_buffer.clear(); } bool MessageParser::parse() { while (!m_buffer.isEmpty()) { if (m_buffer.size() < sizeof(uint32_t)) { // Wait for more data. return true; } uint32_t dataSize = 0; memcpy(&dataSize, &m_buffer[0], sizeof(uint32_t)); dataSize = ntohl(dataSize); if (!dataSize) { LOG_ERROR("Message Parser received an invalid message size"); return false; } size_t messageSize = (sizeof(uint32_t) + dataSize); if (m_buffer.size() < messageSize) { // Wait for more data. return true; } // FIXME: This should avoid re-creating a new data Vector. auto dataBuffer = Vector<uint8_t>(dataSize); memcpy(&dataBuffer[0], &m_buffer[sizeof(uint32_t)], dataSize); m_listener(WTFMove(dataBuffer)); m_buffer.remove(0, messageSize); } return true; } } // namespace Inspector #endif // ENABLE(REMOTE_INSPECTOR)