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/* -*- 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/Endpoint.h"
#include "mozilla/ipc/Transport.h"
#include "mozilla/ipc/FileDescriptor.h"
#include "mozilla/ipc/ProtocolUtils.h"
using base::ProcessHandle;
namespace mozilla {
namespace ipc {
nsresult CreateTransport(TransportDescriptor* aOne, TransportDescriptor* aTwo) {
auto id = IPC::Channel::GenerateVerifiedChannelID();
// 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(
CrashReporter::Annotation::IpcCreateTransportDupErrno, errno);
}
fd2 = dup(fd2);
if (fd2 < 0) {
AnnotateCrashReportWithErrno(
CrashReporter::Annotation::IpcCreateTransportDupErrno, errno);
}
if (fd1 < 0 || fd2 < 0) {
IGNORE_EINTR(close(fd1));
IGNORE_EINTR(close(fd2));
return NS_ERROR_DUPLICATE_HANDLE;
}
aOne->mFd = fd1;
aTwo->mFd = fd2;
return NS_OK;
}
UniquePtr<Transport> OpenDescriptor(const TransportDescriptor& aTd,
Transport::Mode aMode) {
return MakeUnique<Transport>(aTd.mFd, aMode, nullptr);
}
TransportDescriptor DuplicateDescriptor(const TransportDescriptor& aTd) {
TransportDescriptor result = aTd;
result.mFd = dup(aTd.mFd);
if (result.mFd == -1) {
AnnotateSystemError();
}
MOZ_RELEASE_ASSERT(result.mFd != -1, "DuplicateDescriptor failed");
return result;
}
void CloseDescriptor(const TransportDescriptor& aTd) { close(aTd.mFd); }
} // namespace ipc
} // namespace mozilla