text: // Copyright (c) 2006-2008 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 "sandbox/src/sync_dispatcher.h"
  
  #include "base/logging.h"
  #include "sandbox/src/crosscall_client.h"
  #include "sandbox/src/interception.h"
  #include "sandbox/src/ipc_tags.h"
  #include "sandbox/src/policy_broker.h"
  #include "sandbox/src/policy_params.h"
  #include "sandbox/src/sandbox.h"
  #include "sandbox/src/sync_interception.h"
  #include "sandbox/src/sync_policy.h"
  
  namespace sandbox {
  
  SyncDispatcher::SyncDispatcher(PolicyBase* policy_base)
      : policy_base_(policy_base) {
    static const IPCCall create_params = {
      {IPC_CREATEEVENT_TAG, WCHAR_TYPE, ULONG_TYPE, ULONG_TYPE},
      reinterpret_cast<CallbackGeneric>(&SyncDispatcher::CreateEvent)
    };
  
    static const IPCCall open_params = {
      {IPC_OPENEVENT_TAG, WCHAR_TYPE, ULONG_TYPE, ULONG_TYPE},
      reinterpret_cast<CallbackGeneric>(&SyncDispatcher::OpenEvent)
    };
  
    ipc_calls_.push_back(create_params);
    ipc_calls_.push_back(open_params);
  }
  
  bool SyncDispatcher::SetupService(InterceptionManager* manager,
                                    int service) {
    if (IPC_CREATEEVENT_TAG == service)
        return INTERCEPT_EAT(manager, L"kernel32.dll", CreateEventW,
                             L"_TargetCreateEventW@20");
  
    if (IPC_OPENEVENT_TAG == service)
      return INTERCEPT_EAT(manager, L"kernel32.dll", OpenEventW,
                           L"_TargetOpenEventW@16");
  
    return false;
  }
  
  bool SyncDispatcher::CreateEvent(IPCInfo* ipc, std::wstring* name,
                                   DWORD manual_reset, DWORD initial_state) {
    const wchar_t* event_name = name->c_str();
    CountedParameterSet<NameBased> params;
    params[NameBased::NAME] = ParamPickerMake(event_name);
  
    EvalResult result = policy_base_->EvalPolicy(IPC_CREATEEVENT_TAG,
                                                 params.GetBase());
    HANDLE handle = NULL;
    DWORD ret = SyncPolicy::CreateEventAction(result, *ipc->client_info, *name,
                                              manual_reset, initial_state,
                                              &handle);
    // Return operation status on the IPC.
    ipc->return_info.win32_result = ret;
    ipc->return_info.handle = handle;
    return true;
  }
  
  bool SyncDispatcher::OpenEvent(IPCInfo* ipc, std::wstring* name,
                                 DWORD desired_access, DWORD inherit_handle) {
    const wchar_t* event_name = name->c_str();
  
    CountedParameterSet<OpenEventParams> params;
    params[OpenEventParams::NAME] = ParamPickerMake(event_name);
    params[OpenEventParams::ACCESS] = ParamPickerMake(desired_access);
  
    EvalResult result = policy_base_->EvalPolicy(IPC_OPENEVENT_TAG,
                                                 params.GetBase());
    HANDLE handle = NULL;
    DWORD ret = SyncPolicy::OpenEventAction(result, *ipc->client_info, *name,
                                            desired_access, inherit_handle,
                                            &handle);
    // Return operation status on the IPC.
    ipc->return_info.win32_result = ret;
    ipc->return_info.handle = handle;
    return true;
  }
  
  }  // namespace sandbox
  
  