1 files changed, 125 insertions, 0 deletions
diff --git a/ipc/glue/Transport_win.cpp b/ipc/glue/Transport_win.cpp
new file mode 100644
index 000000000..28e9026c3
--- /dev/null
+++ b/ipc/glue/Transport_win.cpp
@@ -0,0 +1,125 @@
+/* -*- 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 "base/message_loop.h"
+
+#include "mozilla/ipc/Transport.h"
+#include "mozilla/ipc/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 pipe
+  Transport t(id, Transport::MODE_SERVER, nullptr);
+  HANDLE serverPipe = t.GetServerPipeHandle();
+  if (!serverPipe) {
+    return NS_ERROR_TRANSPORT_INIT;
+  }
+
+  // NB: we create the server pipe immediately, instead of just
+  // grabbing an ID, on purpose.  In the current setup, the client
+  // needs to connect to an existing server pipe, so to prevent race
+  // conditions, we create the server side here. When we send the pipe
+  // to the server, we DuplicateHandle it to the server process to give it
+  // access.
+  HANDLE serverDup;
+  DWORD access = 0;
+  DWORD options = DUPLICATE_SAME_ACCESS;
+  if (!DuplicateHandle(serverPipe, base::GetCurrentProcId(), &serverDup, access, options)) {
+    return NS_ERROR_DUPLICATE_HANDLE;
+  }
+
+  aOne->mPipeName = aTwo->mPipeName = id;
+  aOne->mServerPipeHandle = serverDup;
+  aOne->mDestinationProcessId = aProcIdOne;
+  aTwo->mServerPipeHandle = INVALID_HANDLE_VALUE;
+  aTwo->mDestinationProcessId = 0;
+  return NS_OK;
+}
+
+HANDLE
+TransferHandleToProcess(HANDLE source, base::ProcessId pid)
+{
+  // At this point we're sending the handle to another process.
+
+  if (source == INVALID_HANDLE_VALUE) {
+    return source;
+  }
+  HANDLE handleDup;
+  DWORD access = 0;
+  DWORD options = DUPLICATE_SAME_ACCESS;
+  bool ok = DuplicateHandle(source, pid, &handleDup, access, options);
+  if (!ok) {
+    return nullptr;
+  }
+
+  // Now close our own copy of the handle (we're supposed to be transferring,
+  // not copying).
+  CloseHandle(source);
+
+  return handleDup;
+}
+
+UniquePtr<Transport>
+OpenDescriptor(const TransportDescriptor& aTd, Transport::Mode aMode)
+{
+  if (aTd.mServerPipeHandle != INVALID_HANDLE_VALUE) {
+    MOZ_RELEASE_ASSERT(aTd.mDestinationProcessId == base::GetCurrentProcId());
+  }
+  return MakeUnique<Transport>(aTd.mPipeName, aTd.mServerPipeHandle, aMode, nullptr);
+}
+
+UniquePtr<Transport>
+OpenDescriptor(const FileDescriptor& aFd, Transport::Mode aMode)
+{
+  NS_NOTREACHED("Not implemented!");
+  return nullptr;
+}
+
+TransportDescriptor
+DuplicateDescriptor(const TransportDescriptor& aTd)
+{
+  // We're duplicating this handle in our own process for bookkeeping purposes.
+
+  if (aTd.mServerPipeHandle == INVALID_HANDLE_VALUE) {
+    return aTd;
+  }
+
+  HANDLE serverDup;
+  DWORD access = 0;
+  DWORD options = DUPLICATE_SAME_ACCESS;
+  bool ok = DuplicateHandle(aTd.mServerPipeHandle, base::GetCurrentProcId(),
+                            &serverDup, access, options);
+  if (!ok) {
+    AnnotateSystemError();
+  }
+  MOZ_RELEASE_ASSERT(ok);
+
+  TransportDescriptor desc = aTd;
+  desc.mServerPipeHandle = serverDup;
+  return desc;
+}
+
+void
+CloseDescriptor(const TransportDescriptor& aTd)
+{
+  // We're closing our own local copy of the pipe.
+
+  CloseHandle(aTd.mServerPipeHandle);
+}
+
+} // namespace ipc
+} // namespace mozilla