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