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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "mojo/edk/system/master_impl.h"
#include "base/containers/hash_tables.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/rand_util.h"
#include "mojo/edk/embedder/embedder.h"
#if defined(OS_WIN)
base::LazyInstance<base::hash_map<uint64_t, HANDLE>>::Leaky
g_token_map = LAZY_INSTANCE_INITIALIZER;
#endif
namespace mojo {
namespace edk {
MasterImpl::MasterImpl(base::ProcessId slave_pid)
#if defined(OS_WIN)
: slave_process_(
base::Process::OpenWithAccess(slave_pid, PROCESS_DUP_HANDLE))
#endif
{
#if defined(OS_WIN)
DCHECK(slave_process_.IsValid());
#endif
}
MasterImpl::~MasterImpl() {
}
void MasterImpl::HandleToToken(ScopedHandle platform_handle,
const HandleToTokenCallback& callback) {
#if defined(OS_WIN)
ScopedPlatformHandle sender_handle;
MojoResult unwrap_result = PassWrappedPlatformHandle(
platform_handle.get().value(), &sender_handle);
if (unwrap_result != MOJO_RESULT_OK) {
DLOG(WARNING) << "HandleToToken couldn't unwrap platform handle.";
callback.Run(unwrap_result, 0);
return;
}
HANDLE master_handle = NULL;
BOOL dup_result =
DuplicateHandle(slave_process_.Handle(), sender_handle.release().handle,
base::GetCurrentProcessHandle(), &master_handle, 0,
FALSE, DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE);
if (!dup_result) {
DLOG(WARNING) << "HandleToToken couldn't duplicate slave handle.";
callback.Run(MOJO_RESULT_INVALID_ARGUMENT, 0);
return;
}
uint64_t token = base::RandUint64();
g_token_map.Get()[token] = master_handle;
callback.Run(MOJO_RESULT_OK, token);
#else
NOTREACHED();
#endif
}
void MasterImpl::TokenToHandle(uint64_t token,
const TokenToHandleCallback& callback) {
#if defined(OS_WIN)
auto it = g_token_map.Get().find(token);
if (it == g_token_map.Get().end()) {
DLOG(WARNING) << "TokenToHandle didn't find token.";
callback.Run(MOJO_RESULT_INVALID_ARGUMENT, ScopedHandle());
return;
}
HANDLE slave_handle = NULL;
BOOL dup_result =
DuplicateHandle(base::GetCurrentProcessHandle(), it->second,
slave_process_.Handle(), &slave_handle, 0,
FALSE, DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE);
if (!dup_result) {
DLOG(WARNING) << "TokenToHandle couldn't duplicate slave handle.";
callback.Run(MOJO_RESULT_INTERNAL, ScopedHandle());
return;
}
ScopedPlatformHandle platform_handle;
platform_handle.reset(PlatformHandle(slave_handle));
MojoHandle handle;
MojoResult wrap_result = CreatePlatformHandleWrapper(
platform_handle.Pass(), &handle);
if (wrap_result != MOJO_RESULT_OK) {
DLOG(WARNING) << "TokenToHandle couldn't unwrap platform handle.";
callback.Run(wrap_result, ScopedHandle());
return;
}
callback.Run(MOJO_RESULT_OK, ScopedHandle(Handle(handle)));
g_token_map.Get().erase(it);
#else
NOTREACHED();
#endif
}
} // namespace edk
} // namespace mojo
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