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diff --git a/wifi/1.0-legacy/hidl_struct_util.h b/wifi/1.0-legacy/hidl_struct_util.h
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+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef HIDL_STRUCT_UTIL_H_
+#define HIDL_STRUCT_UTIL_H_
+
+#include <vector>
+
+#include <android/hardware/wifi/1.0/IWifiChip.h>
+#include <android/hardware/wifi/1.0/types.h>
+#include <android/hardware/wifi/1.2/IWifiChipEventCallback.h>
+#include <android/hardware/wifi/1.2/types.h>
+#include <android/hardware/wifi/1.3/IWifiChip.h>
+#include <android/hardware/wifi/1.3/types.h>
+
+#include "wifi_legacy_hal.h"
+
+/**
+ * This file contains a bunch of functions to convert structs from the legacy
+ * HAL to HIDL and vice versa.
+ * TODO(b/32093047): Add unit tests for these conversion methods in the VTS test
+ * suite.
+ */
+namespace android {
+namespace hardware {
+namespace wifi {
+namespace V1_3 {
+namespace implementation {
+namespace hidl_struct_util {
+using namespace android::hardware::wifi::V1_0;
+
+// Chip conversion methods.
+bool convertLegacyFeaturesToHidlChipCapabilities(
+    uint32_t legacy_feature_set, uint32_t legacy_logger_feature_set,
+    uint32_t* hidl_caps);
+bool convertLegacyDebugRingBufferStatusToHidl(
+    const legacy_hal::wifi_ring_buffer_status& legacy_status,
+    WifiDebugRingBufferStatus* hidl_status);
+bool convertLegacyVectorOfDebugRingBufferStatusToHidl(
+    const std::vector<legacy_hal::wifi_ring_buffer_status>& legacy_status_vec,
+    std::vector<WifiDebugRingBufferStatus>* hidl_status_vec);
+bool convertLegacyWakeReasonStatsToHidl(
+    const legacy_hal::WakeReasonStats& legacy_stats,
+    WifiDebugHostWakeReasonStats* hidl_stats);
+legacy_hal::wifi_power_scenario convertHidlTxPowerScenarioToLegacy(
+    V1_1::IWifiChip::TxPowerScenario hidl_scenario);
+legacy_hal::wifi_latency_mode convertHidlLatencyModeToLegacy(
+    V1_3::IWifiChip::LatencyMode hidl_latency_mode);
+legacy_hal::wifi_power_scenario convertHidlTxPowerScenarioToLegacy_1_2(
+    V1_2::IWifiChip::TxPowerScenario hidl_scenario);
+bool convertLegacyWifiMacInfosToHidl(
+    const std::vector<legacy_hal::WifiMacInfo>& legacy_mac_infos,
+    std::vector<V1_2::IWifiChipEventCallback::RadioModeInfo>*
+        hidl_radio_mode_infos);
+
+// STA iface conversion methods.
+bool convertLegacyFeaturesToHidlStaCapabilities(
+    uint32_t legacy_feature_set, uint32_t legacy_logger_feature_set,
+    uint32_t* hidl_caps);
+bool convertLegacyApfCapabilitiesToHidl(
+    const legacy_hal::PacketFilterCapabilities& legacy_caps,
+    StaApfPacketFilterCapabilities* hidl_caps);
+bool convertLegacyGscanCapabilitiesToHidl(
+    const legacy_hal::wifi_gscan_capabilities& legacy_caps,
+    StaBackgroundScanCapabilities* hidl_caps);
+legacy_hal::wifi_band convertHidlWifiBandToLegacy(WifiBand band);
+bool convertHidlGscanParamsToLegacy(
+    const StaBackgroundScanParameters& hidl_scan_params,
+    legacy_hal::wifi_scan_cmd_params* legacy_scan_params);
+// |has_ie_data| indicates whether or not the wifi_scan_result includes 802.11
+// Information Elements (IEs)
+bool convertLegacyGscanResultToHidl(
+    const legacy_hal::wifi_scan_result& legacy_scan_result, bool has_ie_data,
+    StaScanResult* hidl_scan_result);
+// |cached_results| is assumed to not include IEs.
+bool convertLegacyVectorOfCachedGscanResultsToHidl(
+    const std::vector<legacy_hal::wifi_cached_scan_results>&
+        legacy_cached_scan_results,
+    std::vector<StaScanData>* hidl_scan_datas);
+bool convertLegacyLinkLayerStatsToHidl(
+    const legacy_hal::LinkLayerStats& legacy_stats,
+    V1_3::StaLinkLayerStats* hidl_stats);
+bool convertLegacyRoamingCapabilitiesToHidl(
+    const legacy_hal::wifi_roaming_capabilities& legacy_caps,
+    StaRoamingCapabilities* hidl_caps);
+bool convertHidlRoamingConfigToLegacy(
+    const StaRoamingConfig& hidl_config,
+    legacy_hal::wifi_roaming_config* legacy_config);
+legacy_hal::fw_roaming_state_t convertHidlRoamingStateToLegacy(
+    StaRoamingState state);
+bool convertLegacyVectorOfDebugTxPacketFateToHidl(
+    const std::vector<legacy_hal::wifi_tx_report>& legacy_fates,
+    std::vector<WifiDebugTxPacketFateReport>* hidl_fates);
+bool convertLegacyVectorOfDebugRxPacketFateToHidl(
+    const std::vector<legacy_hal::wifi_rx_report>& legacy_fates,
+    std::vector<WifiDebugRxPacketFateReport>* hidl_fates);
+
+// NAN iface conversion methods.
+void convertToWifiNanStatus(legacy_hal::NanStatusType type, const char* str,
+                            size_t max_len, WifiNanStatus* wifiNanStatus);
+bool convertHidlNanEnableRequestToLegacy(
+    const NanEnableRequest& hidl_request,
+    legacy_hal::NanEnableRequest* legacy_request);
+bool convertHidlNanConfigRequestToLegacy(
+    const NanConfigRequest& hidl_request,
+    legacy_hal::NanConfigRequest* legacy_request);
+bool convertHidlNanEnableRequest_1_2ToLegacy(
+    const NanEnableRequest& hidl_request1,
+    const V1_2::NanConfigRequestSupplemental& hidl_request2,
+    legacy_hal::NanEnableRequest* legacy_request);
+bool convertHidlNanConfigRequest_1_2ToLegacy(
+    const NanConfigRequest& hidl_request1,
+    const V1_2::NanConfigRequestSupplemental& hidl_request2,
+    legacy_hal::NanConfigRequest* legacy_request);
+bool convertHidlNanPublishRequestToLegacy(
+    const NanPublishRequest& hidl_request,
+    legacy_hal::NanPublishRequest* legacy_request);
+bool convertHidlNanSubscribeRequestToLegacy(
+    const NanSubscribeRequest& hidl_request,
+    legacy_hal::NanSubscribeRequest* legacy_request);
+bool convertHidlNanTransmitFollowupRequestToLegacy(
+    const NanTransmitFollowupRequest& hidl_request,
+    legacy_hal::NanTransmitFollowupRequest* legacy_request);
+bool convertHidlNanDataPathInitiatorRequestToLegacy(
+    const NanInitiateDataPathRequest& hidl_request,
+    legacy_hal::NanDataPathInitiatorRequest* legacy_request);
+bool convertHidlNanDataPathIndicationResponseToLegacy(
+    const NanRespondToDataPathIndicationRequest& hidl_response,
+    legacy_hal::NanDataPathIndicationResponse* legacy_response);
+bool convertLegacyNanResponseHeaderToHidl(
+    const legacy_hal::NanResponseMsg& legacy_response,
+    WifiNanStatus* wifiNanStatus);
+bool convertLegacyNanCapabilitiesResponseToHidl(
+    const legacy_hal::NanCapabilities& legacy_response,
+    NanCapabilities* hidl_response);
+bool convertLegacyNanMatchIndToHidl(const legacy_hal::NanMatchInd& legacy_ind,
+                                    NanMatchInd* hidl_ind);
+bool convertLegacyNanFollowupIndToHidl(
+    const legacy_hal::NanFollowupInd& legacy_ind,
+    NanFollowupReceivedInd* hidl_ind);
+bool convertLegacyNanDataPathRequestIndToHidl(
+    const legacy_hal::NanDataPathRequestInd& legacy_ind,
+    NanDataPathRequestInd* hidl_ind);
+bool convertLegacyNanDataPathConfirmIndToHidl(
+    const legacy_hal::NanDataPathConfirmInd& legacy_ind,
+    V1_2::NanDataPathConfirmInd* hidl_ind);
+bool convertLegacyNanDataPathScheduleUpdateIndToHidl(
+    const legacy_hal::NanDataPathScheduleUpdateInd& legacy_ind,
+    V1_2::NanDataPathScheduleUpdateInd* hidl_ind);
+
+// RTT controller conversion methods.
+bool convertHidlVectorOfRttConfigToLegacy(
+    const std::vector<RttConfig>& hidl_configs,
+    std::vector<legacy_hal::wifi_rtt_config>* legacy_configs);
+bool convertHidlRttLciInformationToLegacy(
+    const RttLciInformation& hidl_info,
+    legacy_hal::wifi_lci_information* legacy_info);
+bool convertHidlRttLcrInformationToLegacy(
+    const RttLcrInformation& hidl_info,
+    legacy_hal::wifi_lcr_information* legacy_info);
+bool convertHidlRttResponderToLegacy(
+    const RttResponder& hidl_responder,
+    legacy_hal::wifi_rtt_responder* legacy_responder);
+bool convertHidlWifiChannelInfoToLegacy(
+    const WifiChannelInfo& hidl_info,
+    legacy_hal::wifi_channel_info* legacy_info);
+bool convertLegacyRttResponderToHidl(
+    const legacy_hal::wifi_rtt_responder& legacy_responder,
+    RttResponder* hidl_responder);
+bool convertLegacyRttCapabilitiesToHidl(
+    const legacy_hal::wifi_rtt_capabilities& legacy_capabilities,
+    RttCapabilities* hidl_capabilities);
+bool convertLegacyVectorOfRttResultToHidl(
+    const std::vector<const legacy_hal::wifi_rtt_result*>& legacy_results,
+    std::vector<RttResult>* hidl_results);
+}  // namespace hidl_struct_util
+}  // namespace implementation
+}  // namespace V1_3
+}  // namespace wifi
+}  // namespace hardware
+}  // namespace android
+
+#endif  // HIDL_STRUCT_UTIL_H_