diff --git a/wifi/1.0/default/hidl_struct_util.cpp b/wifi/1.0/default/hidl_struct_util.cpp
index 9e23d556c9..28ad6c3088 100644
--- a/wifi/1.0/default/hidl_struct_util.cpp
+++ b/wifi/1.0/default/hidl_struct_util.cpp
@@ -917,6 +917,7 @@ 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->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";
@@ -995,6 +996,7 @@ 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->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";
@@ -1081,6 +1083,7 @@ bool convertHidlNanTransmitFollowupRequestToLegacy(
   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->recv_indication_cfg = hidl_request.disableFollowupResultIndication ? 0x1 : 0x0;
 
   return true;
@@ -1272,6 +1275,7 @@ 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->maxVsaDataLen = legacy_response.max_vsa_data_len;
   hidl_response->maxNdiInterfaces = legacy_response.max_ndi_interfaces;
   hidl_response->maxNdpSessions = legacy_response.max_ndp_sessions;
@@ -1296,6 +1300,7 @@ 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->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;
diff --git a/wifi/1.0/types.hal b/wifi/1.0/types.hal
index d47f800590..dd098204f2 100644
--- a/wifi/1.0/types.hal
+++ b/wifi/1.0/types.hal
@@ -933,6 +933,13 @@ struct NanDiscoveryCommonConfig {
    * NAN Spec: Service Descriptor Attribute (SDA) / Service Info
    */
   vec<uint8_t> serviceSpecificInfo;
+  /**
+   * Arbitrary information communicated in discovery packets - there is no semantic meaning to these
+   * bytes. They are passed-through from publisher to subscriber as-is with no parsing.
+   * Max length: |NanCapabilities.maxExtendedServiceSpecificInfoLen|.
+   * Spec: Service Descriptor Extension Attribute (SDEA) / Service Info
+   */
+  vec<uint8_t> extendedServiceSpecificInfo;
   /**
    * Ordered sequence of <length, value> pairs (|length| uses 1 byte and contains the number of
    * bytes in the |value| field) which specify further match criteria (beyond the service name).
@@ -1123,6 +1130,13 @@ struct NanTransmitFollowupRequest {
    * NAN Spec: Service Descriptor Attribute (SDA) / Service Info
    */
   vec<uint8_t> serviceSpecificInfo;
+  /**
+   * Arbitrary information communicated in discovery packets - there is no semantic meaning to these
+   * bytes. They are passed-through from publisher to subscriber as-is with no parsing.
+   * Max length: |NanCapabilities.maxExtendedServiceSpecificInfoLen|.
+   * Spec: Service Descriptor Extension Attribute (SDEA) / Service Info
+   */
+  vec<uint8_t> extendedServiceSpecificInfo;
   /**
    * Disable |IWifiNanIfaceEventCallback.eventTransmitFollowup| - i.e. do not get indication on
    * whether the follow-up was transmitted and received successfully.
@@ -1258,6 +1272,10 @@ struct NanCapabilities {
    * Maximum length (in bytes) of the service specific info field.
    */
   uint32_t maxServiceSpecificInfoLen;
+  /**
+   * Maximum length (in bytes) of the extended service specific info field.
+   */
+  uint32_t maxExtendedServiceSpecificInfoLen;
   /**
    * Maximum length (in bytes) of vendor-specific (VSA) data.
    */
@@ -1314,6 +1332,13 @@ struct NanMatchInd {
    * NAN Spec: Service Descriptor Attribute (SDA) / Service Info
    */
   vec<uint8_t> serviceSpecificInfo;
+  /**
+   * Arbitrary information communicated in discovery packets - there is no semantic meaning to these
+   * bytes. They are passed-through from publisher to subscriber as-is with no parsing.
+   * Max length: |NanCapabilities.maxExtendedServiceSpecificInfoLen|.
+   * Spec: Service Descriptor Extension Attribute (SDEA) / Service Info
+   */
+  vec<uint8_t> extendedServiceSpecificInfo;
   /**
    * The match filter from the discovery packet (publish or subscribe) which caused service
    * discovery. Matches the peer's |NanDiscoveryCommonConfig.txMatchFilter|.
@@ -1412,6 +1437,13 @@ struct NanFollowupReceivedInd {
    * NAN Spec: Service Descriptor Attribute (SDA) / Service Info
    */
   vec<uint8_t> serviceSpecificInfo;
+  /**
+   * Arbitrary information communicated in discovery packets - there is no semantic meaning to these
+   * bytes. They are passed-through from publisher to subscriber as-is with no parsing.
+   * Max length: |NanCapabilities.maxExtendedServiceSpecificInfoLen|.
+   * Spec: Service Descriptor Extension Attribute (SDEA) / Service Info
+   */
+  vec<uint8_t> extendedServiceSpecificInfo;
 };
 
 /**