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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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
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