diff --git a/wifi/1.0/default/hidl_struct_util.cpp b/wifi/1.0/default/hidl_struct_util.cpp
index b4dcc0a..234f526 100644
--- a/wifi/1.0/default/hidl_struct_util.cpp
+++ b/wifi/1.0/default/hidl_struct_util.cpp
@@ -251,6 +251,487 @@
   hidl_stats->timeStampInMs = uptimeMillis();
   return true;
 }
+
+legacy_hal::NanPublishType convertHidlNanPublishTypeToLegacy(
+    NanPublishType type) {
+  switch (type) {
+    case NanPublishType::UNSOLICITED:
+      return legacy_hal::NAN_PUBLISH_TYPE_UNSOLICITED;
+    case NanPublishType::SOLICITED:
+      return legacy_hal::NAN_PUBLISH_TYPE_SOLICITED;
+    case NanPublishType::UNSOLICITED_SOLICITED:
+      return legacy_hal::NAN_PUBLISH_TYPE_UNSOLICITED_SOLICITED;
+  };
+}
+
+legacy_hal::NanTxType convertHidlNanTxTypeToLegacy(NanTxType type) {
+  switch (type) {
+    case NanTxType::BROADCAST:
+      return legacy_hal::NAN_TX_TYPE_BROADCAST;
+    case NanTxType::UNICAST:
+      return legacy_hal::NAN_TX_TYPE_UNICAST;
+  };
+}
+
+legacy_hal::NanMatchAlg convertHidlNanMatchAlgToLegacy(NanMatchAlg type) {
+  switch (type) {
+    case NanMatchAlg::MATCH_ONCE:
+      return legacy_hal::NAN_MATCH_ALG_MATCH_ONCE;
+    case NanMatchAlg::MATCH_CONTINUOUS:
+      return legacy_hal::NAN_MATCH_ALG_MATCH_CONTINUOUS;
+    case NanMatchAlg::MATCH_NEVER:
+      return legacy_hal::NAN_MATCH_ALG_MATCH_NEVER;
+  };
+}
+
+legacy_hal::NanSubscribeType convertHidlNanSubscribeTypeToLegacy(
+    NanSubscribeType type) {
+  switch (type) {
+    case NanSubscribeType::ACTIVE:
+      return legacy_hal::NAN_SUBSCRIBE_TYPE_ACTIVE;
+    case NanSubscribeType::PASSIVE:
+      return legacy_hal::NAN_SUBSCRIBE_TYPE_PASSIVE;
+  };
+}
+
+legacy_hal::NanSRFType convertHidlNanSrfTypeToLegacy(NanSrfType type) {
+  switch (type) {
+    case NanSrfType::BLOOM_FILTER:
+      return legacy_hal::NAN_SRF_ATTR_BLOOM_FILTER;
+    case NanSrfType::PARTIAL_MAC_ADDR:
+      return legacy_hal::NAN_SRF_ATTR_PARTIAL_MAC_ADDR;
+  };
+}
+
+legacy_hal::NanSRFIncludeType convertHidlNanSrfIncludeTypeToLegacy(
+    NanSrfIncludeType type) {
+  switch (type) {
+    case NanSrfIncludeType::DO_NOT_RESPOND:
+      return legacy_hal::NAN_SRF_INCLUDE_DO_NOT_RESPOND;
+    case NanSrfIncludeType::RESPOND:
+      return legacy_hal::NAN_SRF_INCLUDE_RESPOND;
+  };
+}
+
+NanStatusType convertLegacyNanStatusTypeToHidl(
+    legacy_hal::NanStatusType /* type */) {
+  // TODO: The |NanStatusType| has changed in legacy HAL and no longer in sync
+  // with the HIDL interface.
+  return NanStatusType::SUCCESS;
+}
+
+NanResponseType convertLegacyNanResponseTypeToHidl(
+    legacy_hal::NanResponseType type) {
+  switch (type) {
+    case legacy_hal::NAN_RESPONSE_ENABLED:
+      return NanResponseType::ENABLED;
+    case legacy_hal::NAN_RESPONSE_DISABLED:
+      return NanResponseType::DISABLED;
+    case legacy_hal::NAN_RESPONSE_PUBLISH:
+      return NanResponseType::PUBLISH;
+    case legacy_hal::NAN_RESPONSE_PUBLISH_CANCEL:
+      return NanResponseType::PUBLISH_CANCEL;
+    case legacy_hal::NAN_RESPONSE_TRANSMIT_FOLLOWUP:
+      return NanResponseType::TRANSMIT_FOLLOWUP;
+    case legacy_hal::NAN_RESPONSE_SUBSCRIBE:
+      return NanResponseType::SUBSCRIBE;
+    case legacy_hal::NAN_RESPONSE_SUBSCRIBE_CANCEL:
+      return NanResponseType::SUBSCRIBE_CANCEL;
+    case legacy_hal::NAN_RESPONSE_STATS:
+      // Not present in HIDL. Is going to be deprecated in legacy HAL as well.
+      CHECK(0);
+    case legacy_hal::NAN_RESPONSE_CONFIG:
+      return NanResponseType::CONFIG;
+    case legacy_hal::NAN_RESPONSE_TCA:
+      // Not present in HIDL. Is going to be deprecated in legacy HAL as well.
+      CHECK(0);
+    case legacy_hal::NAN_RESPONSE_ERROR:
+      return NanResponseType::ERROR;
+    case legacy_hal::NAN_RESPONSE_BEACON_SDF_PAYLOAD:
+      return NanResponseType::BEACON_SDF_PAYLOAD;
+    case legacy_hal::NAN_GET_CAPABILITIES:
+      return NanResponseType::GET_CAPABILITIES;
+    case legacy_hal::NAN_DP_INTERFACE_CREATE:
+      return NanResponseType::DP_INTERFACE_CREATE;
+    case legacy_hal::NAN_DP_INTERFACE_DELETE:
+      return NanResponseType::DP_INTERFACE_DELETE;
+    case legacy_hal::NAN_DP_INITIATOR_RESPONSE:
+      return NanResponseType::DP_INITIATOR_RESPONSE;
+    case legacy_hal::NAN_DP_RESPONDER_RESPONSE:
+      return NanResponseType::DP_RESPONDER_RESPONSE;
+    case legacy_hal::NAN_DP_END:
+      return NanResponseType::DP_END;
+  };
+}
+
+bool convertHidlNanEnableRequestToLegacy(
+    const NanEnableRequest& hidl_request,
+    legacy_hal::NanEnableRequest* legacy_request) {
+  if (!legacy_request) {
+    return false;
+  }
+  legacy_request->master_pref = hidl_request.masterPref;
+  legacy_request->cluster_low = hidl_request.clusterLow;
+  legacy_request->cluster_high = hidl_request.clusterHigh;
+  legacy_request->config_support_5g = hidl_request.validSupport5gVal;
+  legacy_request->support_5g_val = hidl_request.support5gVal;
+  legacy_request->config_sid_beacon = hidl_request.validSidBeaconVal;
+  legacy_request->sid_beacon_val = hidl_request.sidBeaconVal;
+  legacy_request->config_2dot4g_rssi_close =
+      hidl_request.valid2dot4gRssiCloseVal;
+  legacy_request->rssi_close_2dot4g_val = hidl_request.rssiClose2dot4gVal;
+  legacy_request->config_2dot4g_rssi_middle =
+      hidl_request.valid2dot4gRssiMiddleVal;
+  legacy_request->rssi_middle_2dot4g_val = hidl_request.rssiMiddle2dot4gVal;
+  legacy_request->config_2dot4g_rssi_proximity =
+      hidl_request.valid2dot4gRssiProximityVal;
+  legacy_request->rssi_proximity_2dot4g_val =
+      hidl_request.rssiProximity2dot4gVal;
+  legacy_request->config_hop_count_limit = hidl_request.validHopCountLimitVal;
+  legacy_request->hop_count_limit_val = hidl_request.hopCountLimitVal;
+  legacy_request->config_2dot4g_support = hidl_request.valid2dot4gSupportVal;
+  legacy_request->support_2dot4g_val = hidl_request.support2dot4gVal;
+  legacy_request->config_2dot4g_beacons = hidl_request.valid2dot4gBeaconsVal;
+  legacy_request->beacon_2dot4g_val = hidl_request.beacon2dot4gVal;
+  legacy_request->config_2dot4g_sdf = hidl_request.valid2dot4gSdfVal;
+  legacy_request->sdf_2dot4g_val = hidl_request.sdf2dot4gVal;
+  legacy_request->config_5g_beacons = hidl_request.valid5gBeaconsVal;
+  legacy_request->beacon_5g_val = hidl_request.beacon5gVal;
+  legacy_request->config_5g_sdf = hidl_request.valid5gSdfVal;
+  legacy_request->sdf_5g_val = hidl_request.sdf5gVal;
+  legacy_request->config_5g_rssi_close = hidl_request.valid5gRssiCloseVal;
+  legacy_request->rssi_close_5g_val = hidl_request.rssiClose5gVal;
+  legacy_request->config_5g_rssi_middle = hidl_request.valid5gRssiMiddleVal;
+  legacy_request->rssi_middle_5g_val = hidl_request.rssiMiddle5gVal;
+  legacy_request->config_5g_rssi_close_proximity =
+      hidl_request.valid5gRssiCloseProximityVal;
+  legacy_request->rssi_close_proximity_5g_val =
+      hidl_request.rssiCloseProximity5gVal;
+  legacy_request->config_rssi_window_size = hidl_request.validRssiWindowSizeVal;
+  legacy_request->rssi_window_size_val = hidl_request.rssiWindowSizeVal;
+  legacy_request->config_oui = hidl_request.validOuiVal;
+  legacy_request->oui_val = hidl_request.ouiVal;
+  legacy_request->config_intf_addr = hidl_request.validIntfAddrVal;
+  CHECK(hidl_request.intfAddrVal.size() ==
+        sizeof(legacy_request->intf_addr_val));
+  memcpy(legacy_request->intf_addr_val,
+         hidl_request.intfAddrVal.data(),
+         hidl_request.intfAddrVal.size());
+  legacy_request->config_cluster_attribute_val =
+      hidl_request.configClusterAttributeVal;
+  legacy_request->config_scan_params = hidl_request.validScanParamsVal;
+  if (hidl_request.scanParamsVal.dwellTime.size() >
+      sizeof(legacy_request->scan_params_val.dwell_time)) {
+    return false;
+  }
+  memcpy(legacy_request->scan_params_val.dwell_time,
+         hidl_request.scanParamsVal.dwellTime.data(),
+         hidl_request.scanParamsVal.dwellTime.size());
+  if (hidl_request.scanParamsVal.scanPeriod.size() >
+      sizeof(legacy_request->scan_params_val.scan_period)) {
+    return false;
+  }
+  memcpy(legacy_request->scan_params_val.scan_period,
+         hidl_request.scanParamsVal.scanPeriod.data(),
+         hidl_request.scanParamsVal.scanPeriod.size());
+  legacy_request->config_random_factor_force =
+      hidl_request.validRandomFactorForceVal;
+  legacy_request->random_factor_force_val = hidl_request.randomFactorForceVal;
+  legacy_request->config_hop_count_force = hidl_request.validHopCountLimitVal;
+  legacy_request->hop_count_force_val = hidl_request.hopCountLimitVal;
+  legacy_request->config_24g_channel = hidl_request.valid24gChannelVal;
+  legacy_request->channel_24g_val = hidl_request.channel24gVal;
+  legacy_request->config_5g_channel = hidl_request.valid5gChannelVal;
+  legacy_request->channel_5g_val = hidl_request.channel5gVal;
+  return true;
+}
+
+bool convertHidlNanPublishRequestToLegacy(
+    const NanPublishRequest& hidl_request,
+    legacy_hal::NanPublishRequest* legacy_request) {
+  if (!legacy_request) {
+    return false;
+  }
+  legacy_request->publish_id = hidl_request.publishId;
+  legacy_request->ttl = hidl_request.ttl;
+  legacy_request->period = hidl_request.period;
+  legacy_request->publish_type =
+      convertHidlNanPublishTypeToLegacy(hidl_request.publishType);
+  legacy_request->tx_type = convertHidlNanTxTypeToLegacy(hidl_request.txType);
+  legacy_request->publish_count = hidl_request.publishCount;
+  if (hidl_request.serviceName.size() > sizeof(legacy_request->service_name)) {
+    return false;
+  }
+  legacy_request->service_name_len = hidl_request.serviceName.size();
+  memcpy(legacy_request->service_name,
+         hidl_request.serviceName.c_str(),
+         hidl_request.serviceName.size());
+  legacy_request->publish_match_indicator =
+      convertHidlNanMatchAlgToLegacy(hidl_request.publishMatchIndicator);
+  if (hidl_request.serviceSpecificInfo.size() >
+      sizeof(legacy_request->service_specific_info)) {
+    return false;
+  }
+  legacy_request->service_specific_info_len =
+      hidl_request.serviceSpecificInfo.size();
+  memcpy(legacy_request->service_specific_info,
+         hidl_request.serviceSpecificInfo.data(),
+         hidl_request.serviceSpecificInfo.size());
+  if (hidl_request.rxMatchFilter.size() >
+      sizeof(legacy_request->rx_match_filter)) {
+    return false;
+  }
+  legacy_request->rx_match_filter_len = hidl_request.rxMatchFilter.size();
+  memcpy(legacy_request->rx_match_filter,
+         hidl_request.rxMatchFilter.data(),
+         hidl_request.rxMatchFilter.size());
+  if (hidl_request.txMatchFilter.size() >
+      sizeof(legacy_request->tx_match_filter)) {
+    return false;
+  }
+  legacy_request->tx_match_filter_len = hidl_request.txMatchFilter.size();
+  memcpy(legacy_request->tx_match_filter,
+         hidl_request.txMatchFilter.data(),
+         hidl_request.txMatchFilter.size());
+  legacy_request->rssi_threshold_flag = hidl_request.useRssiThreshold;
+  legacy_request->connmap = hidl_request.connmap;
+  legacy_request->recv_indication_cfg = hidl_request.recvIndicationCfg;
+  return true;
+}
+
+bool convertHidlNanPublishCancelRequestToLegacy(
+    const NanPublishCancelRequest& hidl_request,
+    legacy_hal::NanPublishCancelRequest* legacy_request) {
+  legacy_request->publish_id = hidl_request.publishId;
+  return true;
+}
+
+bool convertHidlNanSubscribeRequestToLegacy(
+    const NanSubscribeRequest& hidl_request,
+    legacy_hal::NanSubscribeRequest* legacy_request) {
+  if (!legacy_request) {
+    return false;
+  }
+  legacy_request->subscribe_id = hidl_request.subscribeId;
+  legacy_request->ttl = hidl_request.ttl;
+  legacy_request->period = hidl_request.period;
+  legacy_request->subscribe_type =
+      convertHidlNanSubscribeTypeToLegacy(hidl_request.subscribeType);
+  legacy_request->serviceResponseFilter =
+      convertHidlNanSrfTypeToLegacy(hidl_request.serviceResponseFilter);
+  legacy_request->serviceResponseInclude =
+      convertHidlNanSrfIncludeTypeToLegacy(hidl_request.serviceResponseInclude);
+  legacy_request->useServiceResponseFilter =
+      hidl_request.shouldUseServiceResponseFilter
+          ? legacy_hal::NAN_USE_SRF
+          : legacy_hal::NAN_DO_NOT_USE_SRF;
+  legacy_request->ssiRequiredForMatchIndication =
+      hidl_request.isSsiRequiredForMatchIndication
+          ? legacy_hal::NAN_SSI_REQUIRED_IN_MATCH_IND
+          : legacy_hal::NAN_SSI_NOT_REQUIRED_IN_MATCH_IND;
+  legacy_request->subscribe_match_indicator =
+      convertHidlNanMatchAlgToLegacy(hidl_request.subscribeMatchIndicator);
+  legacy_request->subscribe_count = hidl_request.subscribeCount;
+  if (hidl_request.serviceName.size() > sizeof(legacy_request->service_name)) {
+    return false;
+  }
+  legacy_request->service_name_len = hidl_request.serviceName.size();
+  memcpy(legacy_request->service_name,
+         hidl_request.serviceName.c_str(),
+         hidl_request.serviceName.size());
+  if (hidl_request.serviceSpecificInfo.size() >
+      sizeof(legacy_request->service_specific_info)) {
+    return false;
+  }
+  legacy_request->service_specific_info_len =
+      hidl_request.serviceSpecificInfo.size();
+  memcpy(legacy_request->service_specific_info,
+         hidl_request.serviceSpecificInfo.data(),
+         hidl_request.serviceSpecificInfo.size());
+  if (hidl_request.rxMatchFilter.size() >
+      sizeof(legacy_request->rx_match_filter)) {
+    return false;
+  }
+  legacy_request->rx_match_filter_len = hidl_request.rxMatchFilter.size();
+  memcpy(legacy_request->rx_match_filter,
+         hidl_request.rxMatchFilter.data(),
+         hidl_request.rxMatchFilter.size());
+  if (hidl_request.txMatchFilter.size() >
+      sizeof(legacy_request->tx_match_filter)) {
+    return false;
+  }
+  legacy_request->tx_match_filter_len = hidl_request.txMatchFilter.size();
+  memcpy(legacy_request->tx_match_filter,
+         hidl_request.txMatchFilter.data(),
+         hidl_request.txMatchFilter.size());
+  legacy_request->rssi_threshold_flag = hidl_request.useRssiThreshold;
+  legacy_request->connmap = hidl_request.connmap;
+  if (hidl_request.intfAddr.size() > NAN_MAX_SUBSCRIBE_MAX_ADDRESS) {
+    return false;
+  }
+  legacy_request->num_intf_addr_present = hidl_request.intfAddr.size();
+  for (uint32_t i = 0; i < hidl_request.intfAddr.size(); i++) {
+    CHECK(hidl_request.intfAddr[i].size() ==
+          sizeof(legacy_request->intf_addr[i]));
+    memcpy(legacy_request->intf_addr[i],
+           hidl_request.intfAddr[i].data(),
+           hidl_request.intfAddr[i].size());
+  }
+  legacy_request->recv_indication_cfg = hidl_request.recvIndicationCfg;
+  return true;
+}
+
+bool convertHidlNanSubscribeCancelRequestToLegacy(
+    const NanSubscribeCancelRequest& /* hidl_request */,
+    legacy_hal::NanSubscribeCancelRequest* /* legacy_request */) {
+  return false;
+}
+
+bool convertHidlNanTransmitFollowupRequestToLegacy(
+    const NanTransmitFollowupRequest& /* hidl_request */,
+    legacy_hal::NanTransmitFollowupRequest* /* legacy_request */) {
+  return false;
+}
+
+bool convertHidlNanConfigRequestToLegacy(
+    const NanConfigRequest& /* hidl_request */,
+    legacy_hal::NanConfigRequest* /* legacy_request */) {
+  return false;
+}
+
+bool convertHidlNanBeaconSdfPayloadRequestToLegacy(
+    const NanBeaconSdfPayloadRequest& /* hidl_request */,
+    legacy_hal::NanBeaconSdfPayloadRequest* /* legacy_request */) {
+  return false;
+}
+
+bool convertHidlNanDataPathInitiatorRequestToLegacy(
+    const NanDataPathInitiatorRequest& /* hidl_request */,
+    legacy_hal::NanDataPathInitiatorRequest* /* legacy_request */) {
+  return false;
+}
+
+bool convertHidlNanDataPathIndicationResponseToLegacy(
+    const NanDataPathIndicationResponse& /* hidl_response */,
+    legacy_hal::NanDataPathIndicationResponse* /* legacy_response */) {
+  return false;
+}
+
+bool convertHidlNanDataPathEndRequestToLegacy(
+    const NanDataPathEndRequest& /* hidl_request */,
+    legacy_hal::NanDataPathEndRequest* /* legacy_request */) {
+  return false;
+}
+
+bool convertLegacyNanResponseHeaderToHidl(
+    const legacy_hal::NanResponseMsg& legacy_response,
+    NanResponseMsgHeader* hidl_response) {
+  if (!hidl_response) {
+    return false;
+  }
+  hidl_response->status =
+      convertLegacyNanStatusTypeToHidl(legacy_response.status);
+  hidl_response->value = legacy_response.value;
+  hidl_response->responseType =
+      convertLegacyNanResponseTypeToHidl(legacy_response.response_type);
+  return true;
+}
+
+bool convertLegacyNanPublishResponseToHidl(
+    const legacy_hal::NanPublishResponse& /* legacy_response */,
+    NanPublishResponse* /* hidl_response */) {
+  return false;
+}
+
+bool convertLegacyNanSubscribeResponseToHidl(
+    const legacy_hal::NanSubscribeResponse& /* legacy_response */,
+    NanSubscribeResponse* /* hidl_response */) {
+  return false;
+}
+
+bool convertLegacyNanDataPathResponseToHidl(
+    const legacy_hal::NanDataPathRequestResponse& /* legacy_response */,
+    NanDataPathResponse* /* hidl_response */) {
+  return false;
+}
+
+bool convertLegacyNanCapabilitiesResponseToHidl(
+    const legacy_hal::NanCapabilities& /* legacy_response */,
+    NanCapabilitiesResponse* /* hidl_response */) {
+  return false;
+}
+
+bool convertLegacyNanPublishTerminatedIndToHidl(
+    const legacy_hal::NanPublishTerminatedInd& /* legacy_ind */,
+    NanPublishTerminatedInd* /* hidl_ind */) {
+  return false;
+}
+
+bool convertLegacyNanMatchIndToHidl(
+    const legacy_hal::NanMatchInd& /* legacy_ind */,
+    NanMatchInd* /* hidl_ind */) {
+  return false;
+}
+
+bool convertLegacyNanMatchExpiredIndToHidl(
+    const legacy_hal::NanMatchExpiredInd& /* legacy_ind */,
+    NanMatchExpiredInd* /* hidl_ind */) {
+  return false;
+}
+
+bool convertLegacyNanSubscribeTerminatedIndToHidl(
+    const legacy_hal::NanSubscribeTerminatedInd& /* legacy_ind */,
+    NanSubscribeTerminatedInd* /* hidl_ind */) {
+  return false;
+}
+
+bool convertLegacyNanFollowupIndToHidl(
+    const legacy_hal::NanFollowupInd& /* legacy_ind */,
+    NanFollowupInd* /* hidl_ind */) {
+  return false;
+}
+
+bool convertLegacyNanDiscEngEventIndToHidl(
+    const legacy_hal::NanDiscEngEventInd& /* legacy_ind */,
+    NanDiscEngEventInd* /* hidl_ind */) {
+  return false;
+}
+
+bool convertLegacyNanDisabledIndToHidl(
+    const legacy_hal::NanDisabledInd& /* legacy_ind */,
+    NanDisabledInd* /* hidl_ind */) {
+  return false;
+}
+
+bool convertLegacyNanBeaconSdfPayloadIndToHidl(
+    const legacy_hal::NanBeaconSdfPayloadInd& /* legacy_ind */,
+    NanBeaconSdfPayloadInd* /* hidl_ind */) {
+  return false;
+}
+
+bool convertLegacyNanDataPathRequestIndToHidl(
+    const legacy_hal::NanDataPathRequestInd& /* legacy_ind */,
+    NanDataPathRequestInd* /* hidl_ind */) {
+  return false;
+}
+
+bool convertLegacyNanDataPathConfirmIndToHidl(
+    const legacy_hal::NanDataPathConfirmInd& /* legacy_ind */,
+    NanDataPathConfirmInd* /* hidl_ind */) {
+  return false;
+}
+
+bool convertLegacyNanDataPathEndIndToHidl(
+    const legacy_hal::NanDataPathEndInd& /* legacy_ind */,
+    NanDataPathEndInd* /* hidl_ind */) {
+  return false;
+}
+
+bool convertLegacyNanTransmitFollowupIndToHidl(
+    const legacy_hal::NanTransmitFollowupInd& /* legacy_ind */,
+    NanTransmitFollowupInd* /* hidl_ind */) {
+  return false;
+}
 }  // namespace hidl_struct_util
 }  // namespace implementation
 }  // namespace V1_0
diff --git a/wifi/1.0/default/hidl_struct_util.h b/wifi/1.0/default/hidl_struct_util.h
index 6c91e03..ae1cf70 100644
--- a/wifi/1.0/default/hidl_struct_util.h
+++ b/wifi/1.0/default/hidl_struct_util.h
@@ -36,7 +36,7 @@
 namespace implementation {
 namespace hidl_struct_util {
 
-// Convert hidl gscan params to legacy gscan params.
+// STA iface conversion methods.
 bool convertHidlScanParamsToLegacy(
     const StaBackgroundScanParameters& hidl_scan_params,
     legacy_hal::wifi_scan_cmd_params* legacy_scan_params);
@@ -59,6 +59,89 @@
 bool convertLegacyLinkLayerStatsToHidl(
     const legacy_hal::LinkLayerStats& legacy_stats,
     StaLinkLayerStats* hidl_stats);
+
+// NAN iface conversion methods.
+bool convertHidlNanEnableRequestToLegacy(
+    const NanEnableRequest& hidl_request,
+    legacy_hal::NanEnableRequest* legacy_request);
+bool convertHidlNanPublishRequestToLegacy(
+    const NanPublishRequest& hidl_request,
+    legacy_hal::NanPublishRequest* legacy_request);
+bool convertHidlNanPublishCancelRequestToLegacy(
+    const NanPublishCancelRequest& hidl_request,
+    legacy_hal::NanPublishCancelRequest* legacy_request);
+bool convertHidlNanSubscribeRequestToLegacy(
+    const NanSubscribeRequest& hidl_request,
+    legacy_hal::NanSubscribeRequest* legacy_request);
+bool convertHidlNanSubscribeCancelRequestToLegacy(
+    const NanSubscribeCancelRequest& hidl_request,
+    legacy_hal::NanSubscribeCancelRequest* legacy_request);
+bool convertHidlNanTransmitFollowupRequestToLegacy(
+    const NanTransmitFollowupRequest& hidl_request,
+    legacy_hal::NanTransmitFollowupRequest* legacy_request);
+bool convertHidlNanConfigRequestToLegacy(
+    const NanConfigRequest& hidl_request,
+    legacy_hal::NanConfigRequest* legacy_request);
+bool convertHidlNanBeaconSdfPayloadRequestToLegacy(
+    const NanBeaconSdfPayloadRequest& hidl_request,
+    legacy_hal::NanBeaconSdfPayloadRequest* legacy_request);
+bool convertHidlNanDataPathInitiatorRequestToLegacy(
+    const NanDataPathInitiatorRequest& hidl_request,
+    legacy_hal::NanDataPathInitiatorRequest* legacy_request);
+bool convertHidlNanDataPathIndicationResponseToLegacy(
+    const NanDataPathIndicationResponse& hidl_response,
+    legacy_hal::NanDataPathIndicationResponse* legacy_response);
+bool convertHidlNanDataPathEndRequestToLegacy(
+    const NanDataPathEndRequest& hidl_request,
+    legacy_hal::NanDataPathEndRequest* legacy_request);
+bool convertLegacyNanResponseHeaderToHidl(
+    const legacy_hal::NanResponseMsg& legacy_response,
+    NanResponseMsgHeader* hidl_response);
+bool convertLegacyNanPublishResponseToHidl(
+    const legacy_hal::NanPublishResponse& legacy_response,
+    NanPublishResponse* hidl_response);
+bool convertLegacyNanSubscribeResponseToHidl(
+    const legacy_hal::NanSubscribeResponse& legacy_response,
+    NanSubscribeResponse* hidl_response);
+bool convertLegacyNanDataPathResponseToHidl(
+    const legacy_hal::NanDataPathRequestResponse& legacy_response,
+    NanDataPathResponse* hidl_response);
+bool convertLegacyNanCapabilitiesResponseToHidl(
+    const legacy_hal::NanCapabilities& legacy_response,
+    NanCapabilitiesResponse* hidl_response);
+bool convertLegacyNanPublishTerminatedIndToHidl(
+    const legacy_hal::NanPublishTerminatedInd& legacy_ind,
+    NanPublishTerminatedInd* hidl_ind);
+bool convertLegacyNanMatchIndToHidl(const legacy_hal::NanMatchInd& legacy_ind,
+                                    NanMatchInd* hidl_ind);
+bool convertLegacyNanMatchExpiredIndToHidl(
+    const legacy_hal::NanMatchExpiredInd& legacy_ind,
+    NanMatchExpiredInd* hidl_ind);
+bool convertLegacyNanSubscribeTerminatedIndToHidl(
+    const legacy_hal::NanSubscribeTerminatedInd& legacy_ind,
+    NanSubscribeTerminatedInd* hidl_ind);
+bool convertLegacyNanFollowupIndToHidl(
+    const legacy_hal::NanFollowupInd& legacy_ind, NanFollowupInd* hidl_ind);
+bool convertLegacyNanDiscEngEventIndToHidl(
+    const legacy_hal::NanDiscEngEventInd& legacy_ind,
+    NanDiscEngEventInd* hidl_ind);
+bool convertLegacyNanDisabledIndToHidl(
+    const legacy_hal::NanDisabledInd& legacy_ind, NanDisabledInd* hidl_ind);
+bool convertLegacyNanBeaconSdfPayloadIndToHidl(
+    const legacy_hal::NanBeaconSdfPayloadInd& legacy_ind,
+    NanBeaconSdfPayloadInd* hidl_ind);
+bool convertLegacyNanDataPathRequestIndToHidl(
+    const legacy_hal::NanDataPathRequestInd& legacy_ind,
+    NanDataPathRequestInd* hidl_ind);
+bool convertLegacyNanDataPathConfirmIndToHidl(
+    const legacy_hal::NanDataPathConfirmInd& legacy_ind,
+    NanDataPathConfirmInd* hidl_ind);
+bool convertLegacyNanDataPathEndIndToHidl(
+    const legacy_hal::NanDataPathEndInd& legacy_ind,
+    NanDataPathEndInd* hidl_ind);
+bool convertLegacyNanTransmitFollowupIndToHidl(
+    const legacy_hal::NanTransmitFollowupInd& legacy_ind,
+    NanTransmitFollowupInd* hidl_ind);
 }  // namespace hidl_struct_util
 }  // namespace implementation
 }  // namespace V1_0
diff --git a/wifi/1.0/default/wifi_nan_iface.cpp b/wifi/1.0/default/wifi_nan_iface.cpp
index 48e75a5..a897520 100644
--- a/wifi/1.0/default/wifi_nan_iface.cpp
+++ b/wifi/1.0/default/wifi_nan_iface.cpp
@@ -17,6 +17,7 @@
 #include <android-base/logging.h>
 
 #include "hidl_return_util.h"
+#include "hidl_struct_util.h"
 #include "wifi_nan_iface.h"
 #include "wifi_status_util.h"
 
@@ -30,7 +31,47 @@
 WifiNanIface::WifiNanIface(
     const std::string& ifname,
     const std::weak_ptr<legacy_hal::WifiLegacyHal> legacy_hal)
-    : ifname_(ifname), legacy_hal_(legacy_hal), is_valid_(true) {}
+    : ifname_(ifname), legacy_hal_(legacy_hal), is_valid_(true) {
+  // Register all the callbacks here. these should be valid for the lifetime
+  // of the object. Whenever the mode changes legacy HAL will remove
+  // all of these callbacks.
+  legacy_hal::NanCallbackHandlers callback_handlers;
+
+  // Callback for response.
+  callback_handlers.on_notify_response = [&](
+      legacy_hal::transaction_id id, const legacy_hal::NanResponseMsg& msg) {
+    NanResponseMsgHeader hidl_header;
+    if (!hidl_struct_util::convertLegacyNanResponseHeaderToHidl(msg,
+                                                                &hidl_header)) {
+      LOG(ERROR) << "Failed to convert nan response header";
+      return;
+    }
+    // TODO: This is a union in the legacy HAL. Need to convert to appropriate
+    // callback based on type.
+    // Assuming |NanPublishResponseMsg| type here.
+    NanPublishResponse hidl_body;
+    if (!hidl_struct_util::convertLegacyNanPublishResponseToHidl(
+            msg.body.publish_response, &hidl_body)) {
+      LOG(ERROR) << "Failed to convert nan publish response";
+      return;
+    }
+    NanPublishResponseMsg hidl_msg;
+    hidl_msg.header = hidl_header;
+    hidl_msg.body = hidl_body;
+    for (const auto& callback : event_callbacks_) {
+      if (!callback->notifyPublishResponse(id, hidl_msg).getStatus().isOk()) {
+        LOG(ERROR) << "Failed to invoke the callback";
+      }
+    }
+  };
+  // TODO: Register the remaining callbacks.
+  legacy_hal::wifi_error legacy_status =
+      legacy_hal_.lock()->nanRegisterCallbackHandlers(callback_handlers);
+  if (legacy_status != legacy_hal::WIFI_SUCCESS) {
+    LOG(ERROR) << "Failed to register nan callbacks. Invalidating object";
+    invalidate();
+  }
+}
 
 void WifiNanIface::invalidate() {
   legacy_hal_.reset();
@@ -258,33 +299,60 @@
   return createWifiStatus(WifiStatusCode::SUCCESS);
 }
 
-WifiStatus WifiNanIface::enableRequestInternal(
-    uint32_t /* cmd_id */, const NanEnableRequest& /* msg */) {
-  // TODO implement
-  return createWifiStatus(WifiStatusCode::SUCCESS);
+WifiStatus WifiNanIface::enableRequestInternal(uint32_t cmd_id,
+                                               const NanEnableRequest& msg) {
+  legacy_hal::NanEnableRequest legacy_msg;
+  if (!hidl_struct_util::convertHidlNanEnableRequestToLegacy(msg,
+                                                             &legacy_msg)) {
+    return createWifiStatus(WifiStatusCode::ERROR_INVALID_ARGS);
+  }
+  legacy_hal::wifi_error legacy_status =
+      legacy_hal_.lock()->nanEnableRequest(cmd_id, legacy_msg);
+  return createWifiStatusFromLegacyError(legacy_status);
 }
 
-WifiStatus WifiNanIface::disableRequestInternal(uint32_t /* cmd_id */) {
-  // TODO implement
-  return createWifiStatus(WifiStatusCode::SUCCESS);
+WifiStatus WifiNanIface::disableRequestInternal(uint32_t cmd_id) {
+  legacy_hal::wifi_error legacy_status =
+      legacy_hal_.lock()->nanDisableRequest(cmd_id);
+  return createWifiStatusFromLegacyError(legacy_status);
 }
 
-WifiStatus WifiNanIface::publishRequestInternal(
-    uint32_t /* cmd_id */, const NanPublishRequest& /* msg */) {
-  // TODO implement
-  return createWifiStatus(WifiStatusCode::SUCCESS);
+WifiStatus WifiNanIface::publishRequestInternal(uint32_t cmd_id,
+                                                const NanPublishRequest& msg) {
+  legacy_hal::NanPublishRequest legacy_msg;
+  if (!hidl_struct_util::convertHidlNanPublishRequestToLegacy(msg,
+                                                              &legacy_msg)) {
+    return createWifiStatus(WifiStatusCode::ERROR_INVALID_ARGS);
+  }
+  legacy_hal::wifi_error legacy_status =
+      legacy_hal_.lock()->nanPublishRequest(cmd_id, legacy_msg);
+  return createWifiStatusFromLegacyError(legacy_status);
 }
 
 WifiStatus WifiNanIface::publishCancelRequestInternal(
-    uint32_t /* cmd_id */, const NanPublishCancelRequest& /* msg */) {
-  // TODO implement
-  return createWifiStatus(WifiStatusCode::SUCCESS);
+    uint32_t cmd_id, const NanPublishCancelRequest& msg) {
+  legacy_hal::NanPublishCancelRequest legacy_msg;
+  if (!hidl_struct_util::convertHidlNanPublishCancelRequestToLegacy(
+          msg, &legacy_msg)) {
+    return createWifiStatus(WifiStatusCode::ERROR_INVALID_ARGS);
+  }
+  legacy_hal::wifi_error legacy_status =
+      legacy_hal_.lock()->nanPublishCancelRequest(cmd_id, legacy_msg);
+  return createWifiStatusFromLegacyError(legacy_status);
 }
+
 WifiStatus WifiNanIface::subscribeRequestInternal(
-    uint32_t /* cmd_id */, const NanSubscribeRequest& /* msg */) {
-  // TODO implement
-  return createWifiStatus(WifiStatusCode::SUCCESS);
+    uint32_t cmd_id, const NanSubscribeRequest& msg) {
+  legacy_hal::NanSubscribeRequest legacy_msg;
+  if (!hidl_struct_util::convertHidlNanSubscribeRequestToLegacy(msg,
+                                                                &legacy_msg)) {
+    return createWifiStatus(WifiStatusCode::ERROR_INVALID_ARGS);
+  }
+  legacy_hal::wifi_error legacy_status =
+      legacy_hal_.lock()->nanSubscribeRequest(cmd_id, legacy_msg);
+  return createWifiStatusFromLegacyError(legacy_status);
 }
+
 WifiStatus WifiNanIface::subscribeCancelRequestInternal(
     uint32_t /* cmd_id */, const NanSubscribeCancelRequest& /* msg */) {
   // TODO implement