Cast: Allow extension to control wifi options on windows

net/base/net_util_win.h

Index: net/base/net_util_win.h
diff --git a/net/base/net_util_win.h b/net/base/net_util_win.h
new file mode 100644
index 0000000000000000000000000000000000000000..afa888b1320cf25b96be6555cc10acd9196aaa65
--- /dev/null
+++ b/net/base/net_util_win.h
@@ -0,0 +1,85 @@
+// Copyright (c) 2014 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.
+
+#ifndef NET_BASE_NET_UTIL_WIN_H_
+#define NET_BASE_NET_UTIL_WIN_H_
+
+// This file is only used to expose some of the internals
+// of net_util_win.cc to tests.
+
+#include <wlanapi.h>
+
+#include "base/win/scoped_handle.h"
+#include "net/base/net_export.h"
+
+namespace net {
+namespace internal {
+
+struct NET_EXPORT WlanApi {
+  typedef DWORD (WINAPI *WlanOpenHandleFunc)(
+      DWORD, VOID*, DWORD*, HANDLE*);
+  typedef DWORD (WINAPI *WlanEnumInterfacesFunc)(
+      HANDLE, VOID*, WLAN_INTERFACE_INFO_LIST**);
+  typedef DWORD (WINAPI *WlanQueryInterfaceFunc)(
+      HANDLE, const GUID*, WLAN_INTF_OPCODE, VOID*, DWORD*, VOID**,
+      WLAN_OPCODE_VALUE_TYPE*);
+  typedef DWORD (WINAPI *WlanSetInterfaceFunc)(
+      HANDLE, const GUID*, WLAN_INTF_OPCODE, DWORD, const VOID*, VOID*);
+  typedef VOID (WINAPI *WlanFreeMemoryFunc)(VOID*);
+  typedef DWORD (WINAPI *WlanCloseHandleFunc)(HANDLE, VOID*);
+
+  WlanApi();
+  static WlanApi& GetInstance();
+
+  template <typename T>
+  DWORD OpenHandle(DWORD client_version, DWORD* cur_version, T* handle) const {
+    HANDLE temp_handle;
+    DWORD result = open_handle_func(client_version, NULL, cur_version,
+                                    &temp_handle);
+    if (result != ERROR_SUCCESS)
+      return result;
+    handle->Set(temp_handle);
+    return ERROR_SUCCESS;
+  }
+
+  HMODULE module;
+  WlanOpenHandleFunc open_handle_func;
+  WlanEnumInterfacesFunc enum_interfaces_func;
+  WlanQueryInterfaceFunc query_interface_func;
+  WlanSetInterfaceFunc set_interface_func;
+  WlanFreeMemoryFunc free_memory_func;
+  WlanCloseHandleFunc close_handle_func;
+  bool initialized;
+};
+
+struct WlanApiHandleTraits {
+  typedef HANDLE Handle;
+
+  static bool CloseHandle(HANDLE handle) {
+    return WlanApi::GetInstance().close_handle_func(handle, NULL) ==
+        ERROR_SUCCESS;
+  }
+  static bool IsHandleValid(HANDLE handle) {
+    return base::win::HandleTraits::IsHandleValid(handle);
+  }
+  static HANDLE NullHandle() {
+    return base::win::HandleTraits::NullHandle();
+  }
+};
+
+typedef base::win::GenericScopedHandle<
+  WlanApiHandleTraits,
+  base::win::DummyVerifierTraits> WlanHandle;
+
+struct WlanApiDeleter {
+  inline void operator()(void* ptr) const {
+    WlanApi::GetInstance().free_memory_func(ptr);
+  }
+};
+
+}  // namespace internal
+
+}  // namespace net
+
+#endif   // NET_BASE_NET_UTIL_WIN_H_