Control Wi-Fi hotspot as client by flag

PiperOrigin-RevId: 663862186

connections/implementation/base_pcp_handler.cc

@@ -72,6 +72,7 @@
 #include "internal/platform/feature_flags.h"
 #include "internal/platform/future.h"
 #include "internal/platform/implementation/system_clock.h"
+#include "internal/platform/implementation/wifi.h"
 #include "internal/platform/logging.h"
 #include "internal/platform/mutex_lock.h"
 #include "internal/platform/prng.h"
@@ -777,6 +778,14 @@ ConnectionInfo BasePcpHandler::FillConnectionInfo(
   }
   connection_info.supported_mediums =
       GetSupportedConnectionMediumsByPriority(connection_options);
+
+  if (!NearbyFlags::GetInstance().GetBoolFlag(
+          config_package_nearby::nearby_connections_feature::
+              kEnableWifiHotspotClient)) {
+    // Remove Wi-Fi Hotspot if WiFi LAN is available.
+    StripOutWifiHotspotMedium(connection_info);
+  }
+
   connection_info.keep_alive_interval_millis =
       connection_options.keep_alive_interval_millis;
   connection_info.keep_alive_timeout_millis =
@@ -1239,6 +1248,25 @@ mediums::WebrtcPeerId BasePcpHandler::CreatePeerIdFromAdvertisement(
   return mediums::WebrtcPeerId::FromSeed(ByteArray(std::move(seed)));
 }
 
+void BasePcpHandler::StripOutWifiHotspotMedium(
+    ConnectionInfo& connection_info) {
+  bool has_wifi_lan = false;
+  for (auto medium : connection_info.supported_mediums) {
+    if (medium == location::nearby::proto::connections::WIFI_LAN) {
+      has_wifi_lan = true;
+      break;
+    }
+  }
+
+  if (has_wifi_lan) {
+    connection_info.supported_mediums.erase(
+        std::remove(connection_info.supported_mediums.begin(),
+                    connection_info.supported_mediums.end(),
+                    Medium::WIFI_HOTSPOT),
+        connection_info.supported_mediums.end());
+  }
+}
+
 bool BasePcpHandler::HasOutgoingConnections(ClientProxy* client) const {
   for (const auto& item : pending_connections_) {
     auto& connection = item.second;

connections/implementation/base_pcp_handler.h

@@ -410,6 +410,8 @@ class BasePcpHandler : public PcpHandler,
     return &serial_executor_;
   }
 
+  void StripOutWifiHotspotMedium(ConnectionInfo& connection_info);
+
   // Test only.
   int GetEndpointLostByMediumAlarmsCount() RUN_ON_PCP_HANDLER_THREAD() {
     return endpoint_lost_by_medium_alarms_.size();

connections/implementation/flags/nearby_connections_feature_flags.h

@@ -78,6 +78,10 @@ constexpr auto kDisableBluetoothClassicScanning =
 constexpr auto kEnableInstantOnLost =
     flags::Flag<bool>(kConfigPackage, "45642180", false);
 
+// When true, enable Wi-Fi Hotspot client.
+constexpr auto kEnableWifiHotspotClient =
+    flags::Flag<bool>(kConfigPackage, "45648734", true);
+
 }  // namespace nearby_connections_feature
 }  // namespace config_package_nearby
 }  // namespace connections