/* * Copyright (C) 2010 Apple Inc. All rights reserved. * Copyright (C) 2017 Konstantin Tokarev <annulen@yandex.ru> * Copyright (C) 2017 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 "Attachment.h" #include "Decoder.h" #include "Encoder.h" // FIXME: This code is duplicated with SharedMemory::Handle implementation for Win namespace IPC { void Attachment::encode(Encoder& encoder) const { // Hand off ownership of our HANDLE to the receiving process. It will close it for us. // FIXME: If the receiving process crashes before it receives the memory, the memory will be // leaked. See <http://webkit.org/b/47502>. encoder << reinterpret_cast<uint64_t>(m_handle); // Send along our PID so that the receiving process can duplicate the HANDLE for its own use. encoder << static_cast<uint32_t>(::GetCurrentProcessId()); } static bool getDuplicatedHandle(HANDLE sourceHandle, DWORD sourcePID, HANDLE& duplicatedHandle) { duplicatedHandle = 0; if (!sourceHandle) return true; HANDLE sourceProcess = ::OpenProcess(PROCESS_DUP_HANDLE, FALSE, sourcePID); if (!sourceProcess) return false; // Copy the handle into our process and close the handle that the sending process created for us. BOOL success = ::DuplicateHandle(sourceProcess, sourceHandle, ::GetCurrentProcess(), &duplicatedHandle, 0, FALSE, DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE); ASSERT_WITH_MESSAGE(success, "::DuplicateHandle failed with error %lu", ::GetLastError()); ::CloseHandle(sourceProcess); return success; } bool Attachment::decode(Decoder& decoder, Attachment& attachment) { ASSERT_ARG(attachment, !attachment.m_handle); uint64_t sourceHandle; if (!decoder.decode(sourceHandle)) return false; uint32_t sourcePID; if (!decoder.decode(sourcePID)) return false; HANDLE duplicatedHandle; if (!getDuplicatedHandle(reinterpret_cast<HANDLE>(sourceHandle), sourcePID, duplicatedHandle)) return false; attachment.m_handle = duplicatedHandle; return true; } } // namespace IPC