Check the WiFiDirect support with Win32 API

Close the WiFi Handle after open it

PiperOrigin-RevId: 469602395

internal/platform/implementation/wifi.h

@@ -59,6 +59,7 @@ enum class WifiBandType {
 struct WifiCapability {
   bool supports_5_ghz = false;
   bool supports_6_ghz = false;
+  bool support_wifi_direct = false;
 };
 
 // Native WiFi's information parameters

internal/platform/implementation/windows/BUILD

@@ -127,7 +127,9 @@ cc_library(
         "wifi_lan_socket.cc",
         "wifi_medium.cc",
     ],
-    copts = ["-Ithird_party/nearby/internal/platform/implementation/windows/generated -Ithird_party/nearby/internal/platform/implementation/windows/json"],
+    # This is the temporary solution to solve compilation error of Win32 WFDxxx() related API.
+    # WFD API is only support after _WIN32_WINNT_WIN8, but the current lexan _WIN32_WINNT is set to _WIN32_WINNT_WIN7
+    copts = ["-Ithird_party/nearby/internal/platform/implementation/windows/generated -Ithird_party/nearby/internal/platform/implementation/windows/json -D_WIN32_WINNT=_WIN32_WINNT_WIN10 -DWINVER=_WIN32_WINNT_WIN10"],
     defines = ["_SILENCE_CLANG_COROUTINE_MESSAGE"],
     visibility = [
         "//location/nearby:__subpackages__",

internal/platform/implementation/windows/wifi_hotspot.h

@@ -15,6 +15,10 @@
 #ifndef PLATFORM_IMPL_WINDOWS_WIFI_HOTSPOT_H_
 #define PLATFORM_IMPL_WINDOWS_WIFI_HOTSPOT_H_
 
+// Windows headers
+#include <windows.h>
+#include <wlanapi.h>
+
 // Standard C/C++ headers
 #include <functional>
 #include <optional>

internal/platform/implementation/windows/wifi_hotspot_medium.cc

@@ -38,10 +38,20 @@ WifiHotspotMedium::~WifiHotspotMedium() {
 }
 
 bool WifiHotspotMedium::IsInterfaceValid() const {
-  // Windows 10 starts to support WiFi direct feature, so don't need to check
-  // feature by OS due to targeting OS version is at leat Windows 10.
-  NEARBY_LOGS(ERROR) << "WiFi hotspot: valid interface found.";
-  return true;
+  HANDLE wifi_direct_handle = NULL;
+  DWORD negotiated_version = 0;
+  DWORD result = 0;
+
+  result =
+      WFDOpenHandle(WFD_API_VERSION, &negotiated_version, &wifi_direct_handle);
+  if (result == ERROR_SUCCESS) {
+    NEARBY_LOGS(INFO) << "WiFi can support Hotspot";
+    WFDCloseHandle(wifi_direct_handle);
+    return true;
+  }
+
+  NEARBY_LOGS(ERROR) << "WiFi can't support Hotspot";
+  return false;
 }
 
 std::unique_ptr<api::WifiHotspotSocket> WifiHotspotMedium::ConnectToService(

internal/platform/implementation/windows/wifi_medium.cc

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// #include <cstddef>
 #include "absl/strings/str_format.h"
 #include "internal/platform/implementation/windows/wifi.h"
 #include "internal/platform/implementation/windows/utils.h"
@@ -76,6 +77,7 @@ void WifiMedium::InitCapability() {
   }
   if (!p_intf_list) {
     NEARBY_LOGS(INFO) << "WlanEnumInterfaces failed with error: ";
+    WlanCloseHandle(client_handle, NULL);
     return;
   }
   wifi_interface_valid_ = true;
@@ -87,6 +89,7 @@ void WifiMedium::InitCapability() {
       NEARBY_LOGS(INFO) << "Get Capability failed";
       WlanFreeMemory(p_intf_list);
       p_intf_list = NULL;
+      WlanCloseHandle(client_handle, NULL);
       return;
     }
 
@@ -100,6 +103,7 @@ void WifiMedium::InitCapability() {
   p_intf_capability = NULL;
   WlanFreeMemory(p_intf_list);
   p_intf_list = NULL;
+  WlanCloseHandle(client_handle, NULL);
 }
 
 api::WifiInformation& WifiMedium::GetInformation() {
@@ -125,6 +129,7 @@ api::WifiInformation& WifiMedium::GetInformation() {
   }
   if (!p_intf_list) {
     NEARBY_LOGS(INFO) << "WlanEnumInterfaces failed with error: ";
+    WlanCloseHandle(client_handle, NULL);
     return wifi_information_;
   }
 
@@ -159,6 +164,7 @@ api::WifiInformation& WifiMedium::GetInformation() {
         NEARBY_LOGS(INFO) << "WlanQueryInterface error = " << result;
         WlanFreeMemory(p_intf_list);
         p_intf_list = NULL;
+        WlanCloseHandle(client_handle, NULL);
         return wifi_information_;
       }
 
@@ -188,6 +194,7 @@ api::WifiInformation& WifiMedium::GetInformation() {
   p_connect_info = NULL;
   WlanFreeMemory(p_intf_list);
   p_intf_list = NULL;
+  WlanCloseHandle(client_handle, NULL);
 
   wifi_information_.ip_address_dot_decimal = GetIpAddress();
   wifi_information_.ip_address_4_bytes = ipaddr_dotdecimal_to_4bytes_string(