diff --git a/wifi/1.0/default/hidl_struct_util.cpp b/wifi/1.0/default/hidl_struct_util.cpp
index 0bf0d323c4..7dbc8ebbed 100644
--- a/wifi/1.0/default/hidl_struct_util.cpp
+++ b/wifi/1.0/default/hidl_struct_util.cpp
@@ -917,7 +917,15 @@ bool convertHidlNanPublishRequestToLegacy(
   memcpy(legacy_request->service_specific_info,
         hidl_request.baseConfigs.serviceSpecificInfo.data(),
         legacy_request->service_specific_info_len);
-  // TODO: b/35193423 add support for extended service specific info
+  legacy_request->sdea_service_specific_info_len =
+        hidl_request.baseConfigs.extendedServiceSpecificInfo.size();
+  if (legacy_request->sdea_service_specific_info_len > NAN_MAX_SDEA_SERVICE_SPECIFIC_INFO_LEN) {
+    LOG(ERROR) << "convertHidlNanPublishRequestToLegacy: sdea_service_specific_info_len too large";
+    return false;
+  }
+  memcpy(legacy_request->sdea_service_specific_info,
+        hidl_request.baseConfigs.extendedServiceSpecificInfo.data(),
+        legacy_request->sdea_service_specific_info_len);
   legacy_request->rx_match_filter_len = hidl_request.baseConfigs.rxMatchFilter.size();
   if (legacy_request->rx_match_filter_len > NAN_MAX_MATCH_FILTER_LEN) {
     LOG(ERROR) << "convertHidlNanPublishRequestToLegacy: rx_match_filter_len too large";
@@ -999,7 +1007,16 @@ bool convertHidlNanSubscribeRequestToLegacy(
   memcpy(legacy_request->service_specific_info,
         hidl_request.baseConfigs.serviceSpecificInfo.data(),
         legacy_request->service_specific_info_len);
-  // TODO: b/35193423 add support for extended service specific info
+  legacy_request->sdea_service_specific_info_len =
+        hidl_request.baseConfigs.extendedServiceSpecificInfo.size();
+  if (legacy_request->sdea_service_specific_info_len > NAN_MAX_SDEA_SERVICE_SPECIFIC_INFO_LEN) {
+    LOG(ERROR) <<
+        "convertHidlNanSubscribeRequestToLegacy: sdea_service_specific_info_len too large";
+    return false;
+  }
+  memcpy(legacy_request->sdea_service_specific_info,
+        hidl_request.baseConfigs.extendedServiceSpecificInfo.data(),
+        legacy_request->sdea_service_specific_info_len);
   legacy_request->rx_match_filter_len = hidl_request.baseConfigs.rxMatchFilter.size();
   if (legacy_request->rx_match_filter_len > NAN_MAX_MATCH_FILTER_LEN) {
     LOG(ERROR) << "convertHidlNanSubscribeRequestToLegacy: rx_match_filter_len too large";
@@ -1083,13 +1100,22 @@ bool convertHidlNanTransmitFollowupRequestToLegacy(
         legacy_hal::NAN_TRANSMIT_IN_DW : legacy_hal::NAN_TRANSMIT_IN_FAW;
   legacy_request->service_specific_info_len = hidl_request.serviceSpecificInfo.size();
   if (legacy_request->service_specific_info_len > NAN_MAX_SERVICE_SPECIFIC_INFO_LEN) {
-    LOG(ERROR) << "convertHidlNanTransmitFollowupRequestToLegacy: service_specific_info_len too large";
+    LOG(ERROR) <<
+        "convertHidlNanTransmitFollowupRequestToLegacy: service_specific_info_len too large";
     return false;
   }
   memcpy(legacy_request->service_specific_info,
         hidl_request.serviceSpecificInfo.data(),
         legacy_request->service_specific_info_len);
-  // TODO: b/35193423 add support for extended service specific info
+  legacy_request->sdea_service_specific_info_len = hidl_request.extendedServiceSpecificInfo.size();
+  if (legacy_request->sdea_service_specific_info_len > NAN_MAX_SDEA_SERVICE_SPECIFIC_INFO_LEN) {
+    LOG(ERROR) <<
+        "convertHidlNanTransmitFollowupRequestToLegacy: sdea_service_specific_info_len too large";
+    return false;
+  }
+  memcpy(legacy_request->sdea_service_specific_info,
+        hidl_request.extendedServiceSpecificInfo.data(),
+        legacy_request->sdea_service_specific_info_len);
   legacy_request->recv_indication_cfg = hidl_request.disableFollowupResultIndication ? 0x1 : 0x0;
 
   return true;
@@ -1279,8 +1305,8 @@ bool convertLegacyNanCapabilitiesResponseToHidl(
   hidl_response->maxMatchFilterLen = legacy_response.max_match_filter_len;
   hidl_response->maxTotalMatchFilterLen = legacy_response.max_total_match_filter_len;
   hidl_response->maxServiceSpecificInfoLen = legacy_response.max_service_specific_info_len;
-  // TODO: b/35193423 add support for extended service specific info
-  hidl_response->maxExtendedServiceSpecificInfoLen = 0;
+  hidl_response->maxExtendedServiceSpecificInfoLen =
+    legacy_response.max_sdea_service_specific_info_len;
   hidl_response->maxNdiInterfaces = legacy_response.max_ndi_interfaces;
   hidl_response->maxNdpSessions = legacy_response.max_ndp_sessions;
   hidl_response->maxAppInfoLen = legacy_response.max_app_info_len;
@@ -1303,7 +1329,9 @@ bool convertLegacyNanMatchIndToHidl(
   hidl_ind->addr = hidl_array<uint8_t, 6>(legacy_ind.addr);
   hidl_ind->serviceSpecificInfo = std::vector<uint8_t>(legacy_ind.service_specific_info,
         legacy_ind.service_specific_info + legacy_ind.service_specific_info_len);
-  // TODO: b/35193423 add support for extended service specific info
+  hidl_ind->extendedServiceSpecificInfo = std::vector<uint8_t>(
+        legacy_ind.sdea_service_specific_info,
+        legacy_ind.sdea_service_specific_info + legacy_ind.sdea_service_specific_info_len);
   hidl_ind->matchFilter = std::vector<uint8_t>(legacy_ind.sdf_match_filter,
         legacy_ind.sdf_match_filter + legacy_ind.sdf_match_filter_len);
   hidl_ind->matchOccuredInBeaconFlag = legacy_ind.match_occured_flag == 1;
@@ -1333,6 +1361,9 @@ bool convertLegacyNanFollowupIndToHidl(
   hidl_ind->receivedInFaw = legacy_ind.dw_or_faw == 1;
   hidl_ind->serviceSpecificInfo = std::vector<uint8_t>(legacy_ind.service_specific_info,
         legacy_ind.service_specific_info + legacy_ind.service_specific_info_len);
+  hidl_ind->extendedServiceSpecificInfo = std::vector<uint8_t>(
+        legacy_ind.sdea_service_specific_info,
+        legacy_ind.sdea_service_specific_info + legacy_ind.sdea_service_specific_info_len);
 
   return true;
 }