/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #include <unistd.h> #include <string> #include "base/eintr_wrapper.h" #include "mozilla/ipc/Transport.h" #include "mozilla/ipc/FileDescriptor.h" #include "ProtocolUtils.h" using namespace std; using base::ProcessHandle; namespace mozilla { namespace ipc { nsresult CreateTransport(base::ProcessId aProcIdOne, TransportDescriptor* aOne, TransportDescriptor* aTwo) { wstring id = IPC::Channel::GenerateVerifiedChannelID(std::wstring()); // Use MODE_SERVER to force creation of the socketpair Transport t(id, Transport::MODE_SERVER, nullptr); int fd1 = t.GetFileDescriptor(); int fd2, dontcare; t.GetClientFileDescriptorMapping(&fd2, &dontcare); if (fd1 < 0 || fd2 < 0) { return NS_ERROR_TRANSPORT_INIT; } // The Transport closes these fds when it goes out of scope, so we // dup them here fd1 = dup(fd1); if (fd1 < 0) { AnnotateCrashReportWithErrno("IpcCreateTransportDupErrno", errno); } fd2 = dup(fd2); if (fd2 < 0) { AnnotateCrashReportWithErrno("IpcCreateTransportDupErrno", errno); } if (fd1 < 0 || fd2 < 0) { HANDLE_EINTR(close(fd1)); HANDLE_EINTR(close(fd2)); return NS_ERROR_DUPLICATE_HANDLE; } aOne->mFd = base::FileDescriptor(fd1, true/*close after sending*/); aTwo->mFd = base::FileDescriptor(fd2, true/*close after sending*/); return NS_OK; } UniquePtr<Transport> OpenDescriptor(const TransportDescriptor& aTd, Transport::Mode aMode) { return MakeUnique<Transport>(aTd.mFd.fd, aMode, nullptr); } UniquePtr<Transport> OpenDescriptor(const FileDescriptor& aFd, Transport::Mode aMode) { auto rawFD = aFd.ClonePlatformHandle(); return MakeUnique<Transport>(rawFD.release(), aMode, nullptr); } TransportDescriptor DuplicateDescriptor(const TransportDescriptor& aTd) { TransportDescriptor result = aTd; result.mFd.fd = dup(aTd.mFd.fd); if (result.mFd.fd == -1) { AnnotateSystemError(); } MOZ_RELEASE_ASSERT(result.mFd.fd != -1, "DuplicateDescriptor failed"); return result; } void CloseDescriptor(const TransportDescriptor& aTd) { close(aTd.mFd.fd); } } // namespace ipc } // namespace mozilla