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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /ipc/glue/Transport_win.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'ipc/glue/Transport_win.cpp')
-rw-r--r--ipc/glue/Transport_win.cpp125
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
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+++ b/ipc/glue/Transport_win.cpp
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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 "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