| /* |
| * 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) |