diff --git a/wifi/1.4/Android.bp b/wifi/1.4/Android.bp
index aba8b44..e197859 100644
--- a/wifi/1.4/Android.bp
+++ b/wifi/1.4/Android.bp
@@ -7,8 +7,12 @@
         enabled: true,
     },
     srcs: [
+        "types.hal",
         "IWifi.hal",
         "IWifiApIface.hal",
+        "IWifiChip.hal",
+        "IWifiRttController.hal",
+        "IWifiRttControllerEventCallback.hal",
     ],
     interfaces: [
         "android.hardware.wifi@1.0",
diff --git a/wifi/1.4/IWifiApIface.hal b/wifi/1.4/IWifiApIface.hal
index af88afb..80c576d 100644
--- a/wifi/1.4/IWifiApIface.hal
+++ b/wifi/1.4/IWifiApIface.hal
@@ -49,5 +49,5 @@
      *         |WifiStatusCode.ERROR_UNKNOWN|
      * @return mac factory MAC address of the interface
      */
-     getFactoryMacAddress() generates (WifiStatus status, MacAddress mac);
+    getFactoryMacAddress() generates (WifiStatus status, MacAddress mac);
 };
diff --git a/wifi/1.4/IWifiChip.hal b/wifi/1.4/IWifiChip.hal
new file mode 100644
index 0000000..d269427
--- /dev/null
+++ b/wifi/1.4/IWifiChip.hal
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2019 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.
+ */
+
+package android.hardware.wifi@1.4;
+
+import @1.0::WifiStatus;
+import @1.0::IWifiIface;
+import @1.3::IWifiChip;
+import IWifiRttController;
+
+/**
+ * Interface that represents a chip that must be configured as a single unit.
+ */
+interface IWifiChip extends @1.3::IWifiChip {
+    /**
+     * Create a RTTController instance.
+     *
+     * RTT controller can be either:
+     * a) Bound to a specific iface by passing in the corresponding |IWifiIface|
+     * object in |iface| param, OR
+     * b) Let the implementation decide the iface to use for RTT operations by
+     * passing null in |iface| param.
+     *
+     * @param boundIface HIDL interface object representing the iface if
+     *        the responder must be bound to a specific iface, null otherwise.
+     * @return status WifiStatus of the operation.
+     *         Possible status codes:
+     *         |WifiStatusCode.SUCCESS|,
+     *         |WifiStatusCode.ERROR_WIFI_CHIP_INVALID|
+     */
+    createRttController_1_4(IWifiIface boundIface)
+        generates (WifiStatus status, IWifiRttController rtt);
+};
diff --git a/wifi/1.4/IWifiRttController.hal b/wifi/1.4/IWifiRttController.hal
new file mode 100644
index 0000000..5c71975
--- /dev/null
+++ b/wifi/1.4/IWifiRttController.hal
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2019 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.
+ */
+
+package android.hardware.wifi@1.4;
+
+import @1.0::IWifiRttController;
+import @1.0::CommandId;
+import @1.0::WifiChannelInfo;
+import @1.0::WifiStatus;
+import IWifiRttControllerEventCallback;
+
+/**
+ * Interface used to perform RTT(Round trip time) operations.
+ */
+interface IWifiRttController extends @1.0::IWifiRttController {
+    /**
+     * Requests notifications of significant events on this rtt controller.
+     * Multiple calls to this must register multiple callbacks each of which must
+     * receive all events.
+     *
+     * @param callback An instance of the |IWifiRttControllerEventCallback| HIDL
+     *        interface object.
+     * @return status WifiStatus of the operation.
+     *         Possible status codes:
+     *         |WifiStatusCode.SUCCESS|,
+     *         |WifiStatusCode.ERROR_WIFI_IFACE_INVALID|
+     */
+    registerEventCallback_1_4(IWifiRttControllerEventCallback callback)
+        generates (WifiStatus status);
+
+    /**
+     * API to request RTT measurement.
+     *
+     * @param cmdId command Id to use for this invocation.
+     * @param rttConfigs Vector of |RttConfig| parameters.
+     * @return status WifiStatus of the operation.
+     *         Possible status codes:
+     *         |WifiStatusCode.SUCCESS|,
+     *         |WifiStatusCode.ERROR_WIFI_RTT_CONTROLLER_INVALID|,
+     *         |WifiStatusCode.ERROR_INVALID_ARGS|,
+     *         |WifiStatusCode.ERROR_NOT_AVAILABLE|,
+     *         |WifiStatusCode.ERROR_UNKNOWN|
+     */
+    rangeRequest_1_4(CommandId cmdId, vec<RttConfig> rttConfigs) generates (WifiStatus status);
+
+    /**
+     * RTT capabilities of the device.
+     *
+     * @return status WifiStatus of the operation.
+     *         Possible status codes:
+     *         |WifiStatusCode.SUCCESS|,
+     *         |WifiStatusCode.ERROR_WIFI_RTT_CONTROLLER_INVALID|,
+     *         |WifiStatusCode.ERROR_UNKNOWN|
+     * @return capabilities Instance of |RttCapabilities|.
+     */
+    getCapabilities_1_4() generates (WifiStatus status, RttCapabilities capabilities);
+
+    /**
+     * Get RTT responder information e.g. WiFi channel to enable responder on.
+     *
+     * @return status WifiStatus of the operation.
+     *         Possible status codes:
+     *         |WifiStatusCode.SUCCESS|,
+     *         |WifiStatusCode.ERROR_WIFI_RTT_CONTROLLER_INVALID|,
+     *         |WifiStatusCode.ERROR_NOT_AVAILABLE|,
+     *         |WifiStatusCode.ERROR_UNKNOWN|
+     * @return info Instance of |RttResponderInfo|.
+     */
+    getResponderInfo_1_4() generates (WifiStatus status, RttResponder info);
+
+    /**
+     * Enable RTT responder mode.
+     *
+     * @param cmdId command Id to use for this invocation.
+     * @parm channelHint Hint of the channel information where RTT responder must
+     *       be enabled on.
+     * @param maxDurationInSeconds Timeout of responder mode.
+     * @param info Instance of |RttResponderInfo|.
+     * @return status WifiStatus of the operation.
+     *         Possible status codes:
+     *         |WifiStatusCode.SUCCESS|,
+     *         |WifiStatusCode.ERROR_WIFI_RTT_CONTROLLER_INVALID|,
+     *         |WifiStatusCode.ERROR_INVALID_ARGS|,
+     *         |WifiStatusCode.ERROR_NOT_AVAILABLE|,
+     *         |WifiStatusCode.ERROR_UNKNOWN|
+     */
+    enableResponder_1_4(CommandId cmdId, WifiChannelInfo channelHint,
+        uint32_t maxDurationInSeconds, RttResponder info) generates (WifiStatus status);
+};
diff --git a/wifi/1.4/IWifiRttControllerEventCallback.hal b/wifi/1.4/IWifiRttControllerEventCallback.hal
new file mode 100644
index 0000000..75de3d4
--- /dev/null
+++ b/wifi/1.4/IWifiRttControllerEventCallback.hal
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2019 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.
+ */
+
+package android.hardware.wifi@1.4;
+
+import @1.0::IWifiRttControllerEventCallback;
+import @1.0::CommandId;
+
+/**
+ * RTT Response and Event Callbacks.
+ */
+interface IWifiRttControllerEventCallback extends @1.0::IWifiRttControllerEventCallback {
+    /*
+     * Invoked when an RTT result is available.
+     *
+     * @param cmdId command Id corresponding to the original request.
+     * @param results Vector of |RttResult| instances.
+     */
+    oneway onResults_1_4(CommandId cmdId, vec<RttResult> results);
+};
diff --git a/wifi/1.4/default/hidl_struct_util.cpp b/wifi/1.4/default/hidl_struct_util.cpp
index 47713cd..61f311e 100644
--- a/wifi/1.4/default/hidl_struct_util.cpp
+++ b/wifi/1.4/default/hidl_struct_util.cpp
@@ -2279,6 +2279,8 @@
             return legacy_hal::WIFI_RTT_PREAMBLE_HT;
         case RttPreamble::VHT:
             return legacy_hal::WIFI_RTT_PREAMBLE_VHT;
+        case RttPreamble::HE:
+            return legacy_hal::WIFI_RTT_PREAMBLE_HE;
     };
     CHECK(false);
 }
@@ -2291,6 +2293,8 @@
             return RttPreamble::HT;
         case legacy_hal::WIFI_RTT_PREAMBLE_VHT:
             return RttPreamble::VHT;
+        case legacy_hal::WIFI_RTT_PREAMBLE_HE:
+            return RttPreamble::HE;
     };
     CHECK(false) << "Unknown legacy type: " << type;
 }
@@ -2354,6 +2358,8 @@
             return WifiRatePreamble::HT;
         case 3:
             return WifiRatePreamble::VHT;
+        case 4:
+            return WifiRatePreamble::HE;
         default:
             return WifiRatePreamble::RESERVED;
     };
@@ -2579,9 +2585,10 @@
     hidl_capabilities->responderSupported =
         legacy_capabilities.responder_supported;
     hidl_capabilities->preambleSupport = 0;
-    for (const auto flag : {legacy_hal::WIFI_RTT_PREAMBLE_LEGACY,
-                            legacy_hal::WIFI_RTT_PREAMBLE_HT,
-                            legacy_hal::WIFI_RTT_PREAMBLE_VHT}) {
+    for (const auto flag :
+         {legacy_hal::WIFI_RTT_PREAMBLE_LEGACY,
+          legacy_hal::WIFI_RTT_PREAMBLE_HT, legacy_hal::WIFI_RTT_PREAMBLE_VHT,
+          legacy_hal::WIFI_RTT_PREAMBLE_HE}) {
         if (legacy_capabilities.preamble_support & flag) {
             hidl_capabilities->preambleSupport |=
                 static_cast<std::underlying_type<RttPreamble>::type>(
diff --git a/wifi/1.4/default/hidl_struct_util.h b/wifi/1.4/default/hidl_struct_util.h
index c9f1c26..a99c1ac 100644
--- a/wifi/1.4/default/hidl_struct_util.h
+++ b/wifi/1.4/default/hidl_struct_util.h
@@ -25,6 +25,7 @@
 #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 <android/hardware/wifi/1.4/types.h>
 
 #include "wifi_legacy_hal.h"
 
diff --git a/wifi/1.4/default/tests/wifi_chip_unit_tests.cpp b/wifi/1.4/default/tests/wifi_chip_unit_tests.cpp
index b0357ba..90e81e1 100644
--- a/wifi/1.4/default/tests/wifi_chip_unit_tests.cpp
+++ b/wifi/1.4/default/tests/wifi_chip_unit_tests.cpp
@@ -252,7 +252,7 @@
 
     bool createRttController() {
         bool success = false;
-        chip_->createRttController(
+        chip_->createRttController_1_4(
             NULL, [&success](const WifiStatus& status,
                              const sp<IWifiRttController>& rtt) {
                 if (WifiStatusCode::SUCCESS == status.code) {
@@ -750,7 +750,7 @@
 
     // Create RTT controller
     sp<IWifiRttController> rtt_controller;
-    chip_->createRttController(
+    chip_->createRttController_1_4(
         NULL, [&rtt_controller](const WifiStatus& status,
                                 const sp<IWifiRttController>& rtt) {
             if (WifiStatusCode::SUCCESS == status.code) {
diff --git a/wifi/1.4/default/wifi_chip.cpp b/wifi/1.4/default/wifi_chip.cpp
index 408096f..7685ac6 100644
--- a/wifi/1.4/default/wifi_chip.cpp
+++ b/wifi/1.4/default/wifi_chip.cpp
@@ -620,6 +620,14 @@
     return Void();
 }
 
+Return<void> WifiChip::createRttController_1_4(
+    const sp<IWifiIface>& bound_iface,
+    createRttController_1_4_cb hidl_status_cb) {
+    return validateAndCall(this, WifiStatusCode::ERROR_WIFI_CHIP_INVALID,
+                           &WifiChip::createRttControllerInternal_1_4,
+                           hidl_status_cb, bound_iface);
+}
+
 void WifiChip::invalidateAndRemoveAllIfaces() {
     invalidateAndClearAll(ap_ifaces_);
     invalidateAndClearAll(nan_ifaces_);
@@ -669,30 +677,6 @@
     return {createWifiStatus(WifiStatusCode::ERROR_NOT_SUPPORTED), 0};
 }
 
-std::pair<WifiStatus, uint32_t> WifiChip::getCapabilitiesInternal_1_3() {
-    legacy_hal::wifi_error legacy_status;
-    uint32_t legacy_feature_set;
-    uint32_t legacy_logger_feature_set;
-    const auto ifname = getFirstActiveWlanIfaceName();
-    std::tie(legacy_status, legacy_feature_set) =
-        legacy_hal_.lock()->getSupportedFeatureSet(ifname);
-    if (legacy_status != legacy_hal::WIFI_SUCCESS) {
-        return {createWifiStatusFromLegacyError(legacy_status), 0};
-    }
-    std::tie(legacy_status, legacy_logger_feature_set) =
-        legacy_hal_.lock()->getLoggerSupportedFeatureSet(ifname);
-    if (legacy_status != legacy_hal::WIFI_SUCCESS) {
-        // some devices don't support querying logger feature set
-        legacy_logger_feature_set = 0;
-    }
-    uint32_t hidl_caps;
-    if (!hidl_struct_util::convertLegacyFeaturesToHidlChipCapabilities(
-            legacy_feature_set, legacy_logger_feature_set, &hidl_caps)) {
-        return {createWifiStatus(WifiStatusCode::ERROR_UNKNOWN), 0};
-    }
-    return {createWifiStatus(WifiStatusCode::SUCCESS), hidl_caps};
-}
-
 std::pair<WifiStatus, std::vector<IWifiChip::ChipMode>>
 WifiChip::getAvailableModesInternal() {
     return {createWifiStatus(WifiStatusCode::SUCCESS), modes_};
@@ -996,18 +980,10 @@
     return createWifiStatus(WifiStatusCode::SUCCESS);
 }
 
-std::pair<WifiStatus, sp<IWifiRttController>>
-WifiChip::createRttControllerInternal(const sp<IWifiIface>& bound_iface) {
-    if (sta_ifaces_.size() == 0 &&
-        !canCurrentModeSupportIfaceOfType(IfaceType::STA)) {
-        LOG(ERROR) << "createRttControllerInternal: Chip cannot support STAs "
-                      "(and RTT by extension)";
-        return {createWifiStatus(WifiStatusCode::ERROR_NOT_AVAILABLE), {}};
-    }
-    sp<WifiRttController> rtt = new WifiRttController(
-        getFirstActiveWlanIfaceName(), bound_iface, legacy_hal_);
-    rtt_controllers_.emplace_back(rtt);
-    return {createWifiStatus(WifiStatusCode::SUCCESS), rtt};
+std::pair<WifiStatus, sp<V1_0::IWifiRttController>>
+WifiChip::createRttControllerInternal(const sp<IWifiIface>& /*bound_iface*/) {
+    LOG(ERROR) << "createRttController is not supported on this HAL";
+    return {createWifiStatus(WifiStatusCode::ERROR_NOT_AVAILABLE), {}};
 }
 
 std::pair<WifiStatus, std::vector<WifiDebugRingBufferStatus>>
@@ -1158,6 +1134,45 @@
     return createWifiStatusFromLegacyError(legacy_status);
 }
 
+std::pair<WifiStatus, uint32_t> WifiChip::getCapabilitiesInternal_1_3() {
+    legacy_hal::wifi_error legacy_status;
+    uint32_t legacy_feature_set;
+    uint32_t legacy_logger_feature_set;
+    const auto ifname = getFirstActiveWlanIfaceName();
+    std::tie(legacy_status, legacy_feature_set) =
+        legacy_hal_.lock()->getSupportedFeatureSet(ifname);
+    if (legacy_status != legacy_hal::WIFI_SUCCESS) {
+        return {createWifiStatusFromLegacyError(legacy_status), 0};
+    }
+    std::tie(legacy_status, legacy_logger_feature_set) =
+        legacy_hal_.lock()->getLoggerSupportedFeatureSet(ifname);
+    if (legacy_status != legacy_hal::WIFI_SUCCESS) {
+        // some devices don't support querying logger feature set
+        legacy_logger_feature_set = 0;
+    }
+    uint32_t hidl_caps;
+    if (!hidl_struct_util::convertLegacyFeaturesToHidlChipCapabilities(
+            legacy_feature_set, legacy_logger_feature_set, &hidl_caps)) {
+        return {createWifiStatus(WifiStatusCode::ERROR_UNKNOWN), 0};
+    }
+    return {createWifiStatus(WifiStatusCode::SUCCESS), hidl_caps};
+}
+
+std::pair<WifiStatus, sp<IWifiRttController>>
+WifiChip::createRttControllerInternal_1_4(const sp<IWifiIface>& bound_iface) {
+    if (sta_ifaces_.size() == 0 &&
+        !canCurrentModeSupportIfaceOfType(IfaceType::STA)) {
+        LOG(ERROR)
+            << "createRttControllerInternal_1_4: Chip cannot support STAs "
+               "(and RTT by extension)";
+        return {createWifiStatus(WifiStatusCode::ERROR_NOT_AVAILABLE), {}};
+    }
+    sp<WifiRttController> rtt = new WifiRttController(
+        getFirstActiveWlanIfaceName(), bound_iface, legacy_hal_);
+    rtt_controllers_.emplace_back(rtt);
+    return {createWifiStatus(WifiStatusCode::SUCCESS), rtt};
+}
+
 WifiStatus WifiChip::handleChipConfiguration(
     /* NONNULL */ std::unique_lock<std::recursive_mutex>* lock,
     ChipModeId mode_id) {
diff --git a/wifi/1.4/default/wifi_chip.h b/wifi/1.4/default/wifi_chip.h
index 0d7061c..3bf1847 100644
--- a/wifi/1.4/default/wifi_chip.h
+++ b/wifi/1.4/default/wifi_chip.h
@@ -21,7 +21,8 @@
 #include <map>
 
 #include <android-base/macros.h>
-#include <android/hardware/wifi/1.3/IWifiChip.h>
+#include <android/hardware/wifi/1.4/IWifiChip.h>
+#include <android/hardware/wifi/1.4/IWifiRttController.h>
 
 #include "hidl_callback_util.h"
 #include "ringbuffer.h"
@@ -46,7 +47,7 @@
  * Since there is only a single chip instance used today, there is no
  * identifying handle information stored here.
  */
-class WifiChip : public V1_3::IWifiChip {
+class WifiChip : public V1_4::IWifiChip {
    public:
     WifiChip(
         ChipId chip_id,
@@ -152,6 +153,9 @@
         getCapabilities_cb hidl_status_cb) override;
     Return<void> debug(const hidl_handle& handle,
                        const hidl_vec<hidl_string>& options) override;
+    Return<void> createRttController_1_4(
+        const sp<IWifiIface>& bound_iface,
+        createRttController_1_4_cb hidl_status_cb) override;
 
    private:
     void invalidateAndRemoveAllIfaces();
@@ -195,8 +199,8 @@
     std::pair<WifiStatus, sp<IWifiStaIface>> getStaIfaceInternal(
         const std::string& ifname);
     WifiStatus removeStaIfaceInternal(const std::string& ifname);
-    std::pair<WifiStatus, sp<IWifiRttController>> createRttControllerInternal(
-        const sp<IWifiIface>& bound_iface);
+    std::pair<WifiStatus, sp<V1_0::IWifiRttController>>
+    createRttControllerInternal(const sp<IWifiIface>& bound_iface);
     std::pair<WifiStatus, std::vector<WifiDebugRingBufferStatus>>
     getDebugRingBuffersStatusInternal();
     WifiStatus startLoggingToDebugRingBufferInternal(
@@ -217,6 +221,8 @@
         const sp<V1_2::IWifiChipEventCallback>& event_callback);
     WifiStatus selectTxPowerScenarioInternal_1_2(TxPowerScenario scenario);
     std::pair<WifiStatus, uint32_t> getCapabilitiesInternal_1_3();
+    std::pair<WifiStatus, sp<IWifiRttController>>
+    createRttControllerInternal_1_4(const sp<IWifiIface>& bound_iface);
     WifiStatus handleChipConfiguration(
         std::unique_lock<std::recursive_mutex>* lock, ChipModeId mode_id);
     WifiStatus registerDebugRingBufferCallback();
diff --git a/wifi/1.4/default/wifi_rtt_controller.cpp b/wifi/1.4/default/wifi_rtt_controller.cpp
index d50c7cf..594a116 100644
--- a/wifi/1.4/default/wifi_rtt_controller.cpp
+++ b/wifi/1.4/default/wifi_rtt_controller.cpp
@@ -58,7 +58,7 @@
 }
 
 Return<void> WifiRttController::registerEventCallback(
-    const sp<IWifiRttControllerEventCallback>& callback,
+    const sp<V1_0::IWifiRttControllerEventCallback>& callback,
     registerEventCallback_cb hidl_status_cb) {
     return validateAndCall(this,
                            WifiStatusCode::ERROR_WIFI_RTT_CONTROLLER_INVALID,
@@ -67,7 +67,7 @@
 }
 
 Return<void> WifiRttController::rangeRequest(
-    uint32_t cmd_id, const hidl_vec<RttConfig>& rtt_configs,
+    uint32_t cmd_id, const hidl_vec<V1_0::RttConfig>& rtt_configs,
     rangeRequest_cb hidl_status_cb) {
     return validateAndCall(this,
                            WifiStatusCode::ERROR_WIFI_RTT_CONTROLLER_INVALID,
@@ -115,7 +115,7 @@
 
 Return<void> WifiRttController::enableResponder(
     uint32_t cmd_id, const WifiChannelInfo& channel_hint,
-    uint32_t max_duration_seconds, const RttResponder& info,
+    uint32_t max_duration_seconds, const V1_0::RttResponder& info,
     enableResponder_cb hidl_status_cb) {
     return validateAndCall(
         this, WifiStatusCode::ERROR_WIFI_RTT_CONTROLLER_INVALID,
@@ -130,49 +130,64 @@
         &WifiRttController::disableResponderInternal, hidl_status_cb, cmd_id);
 }
 
+Return<void> WifiRttController::registerEventCallback_1_4(
+    const sp<IWifiRttControllerEventCallback>& callback,
+    registerEventCallback_1_4_cb hidl_status_cb) {
+    return validateAndCall(
+        this, WifiStatusCode::ERROR_WIFI_RTT_CONTROLLER_INVALID,
+        &WifiRttController::registerEventCallbackInternal_1_4, hidl_status_cb,
+        callback);
+}
+
+Return<void> WifiRttController::rangeRequest_1_4(
+    uint32_t cmd_id, const hidl_vec<RttConfig>& rtt_configs,
+    rangeRequest_1_4_cb hidl_status_cb) {
+    return validateAndCall(this,
+                           WifiStatusCode::ERROR_WIFI_RTT_CONTROLLER_INVALID,
+                           &WifiRttController::rangeRequestInternal_1_4,
+                           hidl_status_cb, cmd_id, rtt_configs);
+}
+
+Return<void> WifiRttController::getCapabilities_1_4(
+    getCapabilities_1_4_cb hidl_status_cb) {
+    return validateAndCall(
+        this, WifiStatusCode::ERROR_WIFI_RTT_CONTROLLER_INVALID,
+        &WifiRttController::getCapabilitiesInternal_1_4, hidl_status_cb);
+}
+
+Return<void> WifiRttController::getResponderInfo_1_4(
+    getResponderInfo_1_4_cb hidl_status_cb) {
+    return validateAndCall(
+        this, WifiStatusCode::ERROR_WIFI_RTT_CONTROLLER_INVALID,
+        &WifiRttController::getResponderInfoInternal_1_4, hidl_status_cb);
+}
+
+Return<void> WifiRttController::enableResponder_1_4(
+    uint32_t cmd_id, const WifiChannelInfo& channel_hint,
+    uint32_t max_duration_seconds, const RttResponder& info,
+    enableResponder_1_4_cb hidl_status_cb) {
+    return validateAndCall(
+        this, WifiStatusCode::ERROR_WIFI_RTT_CONTROLLER_INVALID,
+        &WifiRttController::enableResponderInternal_1_4, hidl_status_cb, cmd_id,
+        channel_hint, max_duration_seconds, info);
+}
+
 std::pair<WifiStatus, sp<IWifiIface>>
 WifiRttController::getBoundIfaceInternal() {
     return {createWifiStatus(WifiStatusCode::SUCCESS), bound_iface_};
 }
 
 WifiStatus WifiRttController::registerEventCallbackInternal(
-    const sp<IWifiRttControllerEventCallback>& callback) {
-    // TODO(b/31632518): remove the callback when the client is destroyed
-    event_callbacks_.emplace_back(callback);
-    return createWifiStatus(WifiStatusCode::SUCCESS);
+    const sp<V1_0::IWifiRttControllerEventCallback>& /* callback */) {
+    // Deprecated support for this api
+    return createWifiStatus(WifiStatusCode::ERROR_NOT_SUPPORTED);
 }
 
 WifiStatus WifiRttController::rangeRequestInternal(
-    uint32_t cmd_id, const std::vector<RttConfig>& rtt_configs) {
-    std::vector<legacy_hal::wifi_rtt_config> legacy_configs;
-    if (!hidl_struct_util::convertHidlVectorOfRttConfigToLegacy(
-            rtt_configs, &legacy_configs)) {
-        return createWifiStatus(WifiStatusCode::ERROR_INVALID_ARGS);
-    }
-    android::wp<WifiRttController> weak_ptr_this(this);
-    const auto& on_results_callback =
-        [weak_ptr_this](
-            legacy_hal::wifi_request_id id,
-            const std::vector<const legacy_hal::wifi_rtt_result*>& results) {
-            const auto shared_ptr_this = weak_ptr_this.promote();
-            if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
-                LOG(ERROR) << "Callback invoked on an invalid object";
-                return;
-            }
-            std::vector<RttResult> hidl_results;
-            if (!hidl_struct_util::convertLegacyVectorOfRttResultToHidl(
-                    results, &hidl_results)) {
-                LOG(ERROR) << "Failed to convert rtt results to HIDL structs";
-                return;
-            }
-            for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
-                callback->onResults(id, hidl_results);
-            }
-        };
-    legacy_hal::wifi_error legacy_status =
-        legacy_hal_.lock()->startRttRangeRequest(
-            ifname_, cmd_id, legacy_configs, on_results_callback);
-    return createWifiStatusFromLegacyError(legacy_status);
+    uint32_t /* cmd_id */,
+    const std::vector<V1_0::RttConfig>& /* rtt_configs */) {
+    // Deprecated support for this api
+    return createWifiStatus(WifiStatusCode::ERROR_NOT_SUPPORTED);
 }
 
 WifiStatus WifiRttController::rangeCancelInternal(
@@ -187,21 +202,10 @@
     return createWifiStatusFromLegacyError(legacy_status);
 }
 
-std::pair<WifiStatus, RttCapabilities>
+std::pair<WifiStatus, V1_0::RttCapabilities>
 WifiRttController::getCapabilitiesInternal() {
-    legacy_hal::wifi_error legacy_status;
-    legacy_hal::wifi_rtt_capabilities legacy_caps;
-    std::tie(legacy_status, legacy_caps) =
-        legacy_hal_.lock()->getRttCapabilities(ifname_);
-    if (legacy_status != legacy_hal::WIFI_SUCCESS) {
-        return {createWifiStatusFromLegacyError(legacy_status), {}};
-    }
-    RttCapabilities hidl_caps;
-    if (!hidl_struct_util::convertLegacyRttCapabilitiesToHidl(legacy_caps,
-                                                              &hidl_caps)) {
-        return {createWifiStatus(WifiStatusCode::ERROR_UNKNOWN), {}};
-    }
-    return {createWifiStatus(WifiStatusCode::SUCCESS), hidl_caps};
+    // Deprecated support for this api
+    return {createWifiStatus(WifiStatusCode::ERROR_NOT_SUPPORTED), {}};
 }
 
 WifiStatus WifiRttController::setLciInternal(uint32_t cmd_id,
@@ -228,8 +232,84 @@
     return createWifiStatusFromLegacyError(legacy_status);
 }
 
-std::pair<WifiStatus, RttResponder>
+std::pair<WifiStatus, V1_0::RttResponder>
 WifiRttController::getResponderInfoInternal() {
+    // Deprecated support for this api
+    return {createWifiStatus(WifiStatusCode::ERROR_NOT_SUPPORTED), {}};
+}
+
+WifiStatus WifiRttController::enableResponderInternal(
+    uint32_t /* cmd_id */, const WifiChannelInfo& /* channel_hint */,
+    uint32_t /* max_duration_seconds */, const V1_0::RttResponder& /* info */) {
+    // Deprecated support for this api
+    return {createWifiStatus(WifiStatusCode::ERROR_NOT_SUPPORTED)};
+}
+
+WifiStatus WifiRttController::disableResponderInternal(uint32_t cmd_id) {
+    legacy_hal::wifi_error legacy_status =
+        legacy_hal_.lock()->disableRttResponder(ifname_, cmd_id);
+    return createWifiStatusFromLegacyError(legacy_status);
+}
+
+WifiStatus WifiRttController::registerEventCallbackInternal_1_4(
+    const sp<IWifiRttControllerEventCallback>& callback) {
+    // TODO(b/31632518): remove the callback when the client is destroyed
+    event_callbacks_.emplace_back(callback);
+    return createWifiStatus(WifiStatusCode::SUCCESS);
+}
+
+WifiStatus WifiRttController::rangeRequestInternal_1_4(
+    uint32_t cmd_id, const std::vector<RttConfig>& rtt_configs) {
+    std::vector<legacy_hal::wifi_rtt_config> legacy_configs;
+    if (!hidl_struct_util::convertHidlVectorOfRttConfigToLegacy(
+            rtt_configs, &legacy_configs)) {
+        return createWifiStatus(WifiStatusCode::ERROR_INVALID_ARGS);
+    }
+    android::wp<WifiRttController> weak_ptr_this(this);
+    const auto& on_results_callback =
+        [weak_ptr_this](
+            legacy_hal::wifi_request_id id,
+            const std::vector<const legacy_hal::wifi_rtt_result*>& results) {
+            const auto shared_ptr_this = weak_ptr_this.promote();
+            if (!shared_ptr_this.get() || !shared_ptr_this->isValid()) {
+                LOG(ERROR) << "Callback invoked on an invalid object";
+                return;
+            }
+            std::vector<RttResult> hidl_results;
+            if (!hidl_struct_util::convertLegacyVectorOfRttResultToHidl(
+                    results, &hidl_results)) {
+                LOG(ERROR) << "Failed to convert rtt results to HIDL structs";
+                return;
+            }
+            for (const auto& callback : shared_ptr_this->getEventCallbacks()) {
+                callback->onResults_1_4(id, hidl_results);
+            }
+        };
+    legacy_hal::wifi_error legacy_status =
+        legacy_hal_.lock()->startRttRangeRequest(
+            ifname_, cmd_id, legacy_configs, on_results_callback);
+    return createWifiStatusFromLegacyError(legacy_status);
+}
+
+std::pair<WifiStatus, RttCapabilities>
+WifiRttController::getCapabilitiesInternal_1_4() {
+    legacy_hal::wifi_error legacy_status;
+    legacy_hal::wifi_rtt_capabilities legacy_caps;
+    std::tie(legacy_status, legacy_caps) =
+        legacy_hal_.lock()->getRttCapabilities(ifname_);
+    if (legacy_status != legacy_hal::WIFI_SUCCESS) {
+        return {createWifiStatusFromLegacyError(legacy_status), {}};
+    }
+    RttCapabilities hidl_caps;
+    if (!hidl_struct_util::convertLegacyRttCapabilitiesToHidl(legacy_caps,
+                                                              &hidl_caps)) {
+        return {createWifiStatus(WifiStatusCode::ERROR_UNKNOWN), {}};
+    }
+    return {createWifiStatus(WifiStatusCode::SUCCESS), hidl_caps};
+}
+
+std::pair<WifiStatus, RttResponder>
+WifiRttController::getResponderInfoInternal_1_4() {
     legacy_hal::wifi_error legacy_status;
     legacy_hal::wifi_rtt_responder legacy_responder;
     std::tie(legacy_status, legacy_responder) =
@@ -245,7 +325,7 @@
     return {createWifiStatus(WifiStatusCode::SUCCESS), hidl_responder};
 }
 
-WifiStatus WifiRttController::enableResponderInternal(
+WifiStatus WifiRttController::enableResponderInternal_1_4(
     uint32_t cmd_id, const WifiChannelInfo& channel_hint,
     uint32_t max_duration_seconds, const RttResponder& info) {
     legacy_hal::wifi_channel_info legacy_channel_info;
@@ -264,12 +344,6 @@
             legacy_responder);
     return createWifiStatusFromLegacyError(legacy_status);
 }
-
-WifiStatus WifiRttController::disableResponderInternal(uint32_t cmd_id) {
-    legacy_hal::wifi_error legacy_status =
-        legacy_hal_.lock()->disableRttResponder(ifname_, cmd_id);
-    return createWifiStatusFromLegacyError(legacy_status);
-}
 }  // namespace implementation
 }  // namespace V1_4
 }  // namespace wifi
diff --git a/wifi/1.4/default/wifi_rtt_controller.h b/wifi/1.4/default/wifi_rtt_controller.h
index 1415ff7..1f12555 100644
--- a/wifi/1.4/default/wifi_rtt_controller.h
+++ b/wifi/1.4/default/wifi_rtt_controller.h
@@ -19,8 +19,8 @@
 
 #include <android-base/macros.h>
 #include <android/hardware/wifi/1.0/IWifiIface.h>
-#include <android/hardware/wifi/1.0/IWifiRttController.h>
-#include <android/hardware/wifi/1.0/IWifiRttControllerEventCallback.h>
+#include <android/hardware/wifi/1.4/IWifiRttController.h>
+#include <android/hardware/wifi/1.4/IWifiRttControllerEventCallback.h>
 
 #include "wifi_legacy_hal.h"
 
@@ -33,7 +33,7 @@
 /**
  * HIDL interface object used to control all RTT operations.
  */
-class WifiRttController : public V1_0::IWifiRttController {
+class WifiRttController : public V1_4::IWifiRttController {
    public:
     WifiRttController(
         const std::string& iface_name, const sp<IWifiIface>& bound_iface,
@@ -47,10 +47,10 @@
     // HIDL methods exposed.
     Return<void> getBoundIface(getBoundIface_cb hidl_status_cb) override;
     Return<void> registerEventCallback(
-        const sp<IWifiRttControllerEventCallback>& callback,
+        const sp<V1_0::IWifiRttControllerEventCallback>& callback,
         registerEventCallback_cb hidl_status_cb) override;
     Return<void> rangeRequest(uint32_t cmd_id,
-                              const hidl_vec<RttConfig>& rtt_configs,
+                              const hidl_vec<V1_0::RttConfig>& rtt_configs,
                               rangeRequest_cb hidl_status_cb) override;
     Return<void> rangeCancel(uint32_t cmd_id,
                              const hidl_vec<hidl_array<uint8_t, 6>>& addrs,
@@ -64,29 +64,53 @@
     Return<void> enableResponder(uint32_t cmd_id,
                                  const WifiChannelInfo& channel_hint,
                                  uint32_t max_duration_seconds,
-                                 const RttResponder& info,
+                                 const V1_0::RttResponder& info,
                                  enableResponder_cb hidl_status_cb) override;
     Return<void> disableResponder(uint32_t cmd_id,
                                   disableResponder_cb hidl_status_cb) override;
+    Return<void> registerEventCallback_1_4(
+        const sp<IWifiRttControllerEventCallback>& callback,
+        registerEventCallback_1_4_cb hidl_status_cb) override;
+    Return<void> rangeRequest_1_4(uint32_t cmd_id,
+                                  const hidl_vec<RttConfig>& rtt_configs,
+                                  rangeRequest_1_4_cb hidl_status_cb) override;
+    Return<void> getCapabilities_1_4(
+        getCapabilities_1_4_cb hidl_status_cb) override;
+    Return<void> getResponderInfo_1_4(
+        getResponderInfo_1_4_cb hidl_status_cb) override;
+    Return<void> enableResponder_1_4(
+        uint32_t cmd_id, const WifiChannelInfo& channel_hint,
+        uint32_t max_duration_seconds, const RttResponder& info,
+        enableResponder_1_4_cb hidl_status_cb) override;
 
    private:
     // Corresponding worker functions for the HIDL methods.
     std::pair<WifiStatus, sp<IWifiIface>> getBoundIfaceInternal();
     WifiStatus registerEventCallbackInternal(
-        const sp<IWifiRttControllerEventCallback>& callback);
-    WifiStatus rangeRequestInternal(uint32_t cmd_id,
-                                    const std::vector<RttConfig>& rtt_configs);
+        const sp<V1_0::IWifiRttControllerEventCallback>& callback);
+    WifiStatus rangeRequestInternal(
+        uint32_t cmd_id, const std::vector<V1_0::RttConfig>& rtt_configs);
     WifiStatus rangeCancelInternal(
         uint32_t cmd_id, const std::vector<hidl_array<uint8_t, 6>>& addrs);
-    std::pair<WifiStatus, RttCapabilities> getCapabilitiesInternal();
+    std::pair<WifiStatus, V1_0::RttCapabilities> getCapabilitiesInternal();
     WifiStatus setLciInternal(uint32_t cmd_id, const RttLciInformation& lci);
     WifiStatus setLcrInternal(uint32_t cmd_id, const RttLcrInformation& lcr);
-    std::pair<WifiStatus, RttResponder> getResponderInfoInternal();
+    std::pair<WifiStatus, V1_0::RttResponder> getResponderInfoInternal();
     WifiStatus enableResponderInternal(uint32_t cmd_id,
                                        const WifiChannelInfo& channel_hint,
                                        uint32_t max_duration_seconds,
-                                       const RttResponder& info);
+                                       const V1_0::RttResponder& info);
     WifiStatus disableResponderInternal(uint32_t cmd_id);
+    WifiStatus registerEventCallbackInternal_1_4(
+        const sp<IWifiRttControllerEventCallback>& callback);
+    WifiStatus rangeRequestInternal_1_4(
+        uint32_t cmd_id, const std::vector<RttConfig>& rtt_configs);
+    std::pair<WifiStatus, RttCapabilities> getCapabilitiesInternal_1_4();
+    std::pair<WifiStatus, RttResponder> getResponderInfoInternal_1_4();
+    WifiStatus enableResponderInternal_1_4(uint32_t cmd_id,
+                                           const WifiChannelInfo& channel_hint,
+                                           uint32_t max_duration_seconds,
+                                           const RttResponder& info);
 
     std::string ifname_;
     sp<IWifiIface> bound_iface_;
diff --git a/wifi/1.4/default/wifi_status_util.h b/wifi/1.4/default/wifi_status_util.h
index 41bcfaf..3ff58f0 100644
--- a/wifi/1.4/default/wifi_status_util.h
+++ b/wifi/1.4/default/wifi_status_util.h
@@ -17,7 +17,7 @@
 #ifndef WIFI_STATUS_UTIL_H_
 #define WIFI_STATUS_UTIL_H_
 
-#include <android/hardware/wifi/1.0/IWifi.h>
+#include <android/hardware/wifi/1.4/IWifi.h>
 
 #include "wifi_legacy_hal.h"
 
diff --git a/wifi/1.4/types.hal b/wifi/1.4/types.hal
new file mode 100644
index 0000000..232e26f
--- /dev/null
+++ b/wifi/1.4/types.hal
@@ -0,0 +1,380 @@
+/*
+ * Copyright 2019 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.
+ */
+
+package android.hardware.wifi@1.4;
+
+import @1.0::MacAddress;
+import @1.0::Rssi;
+import @1.0::RttBw;
+import @1.0::RttConfig;
+import @1.0::RttPeerType;
+import @1.0::RttPreamble;
+import @1.0::RttStatus;
+import @1.0::RttType;
+import @1.0::TimeSpanInPs;
+import @1.0::TimeStampInUs;
+import @1.0::WifiChannelInfo;
+import @1.0::WifiChannelWidthInMhz;
+import @1.0::WifiInformationElement;
+import @1.0::WifiRateNss;
+import @1.0::WifiRatePreamble;
+
+/**
+ * Wifi Rate Preamble
+ */
+enum WifiRatePreamble : @1.0::WifiRatePreamble {
+    /**
+     * Preamble type for 11ax
+     */
+    HE = 5,
+};
+
+/**
+ * RTT Measurement Preamble.
+ */
+enum RttPreamble : @1.0::RttPreamble {
+    /**
+     * Preamble type for 11ax
+     */
+    HE = 0x8,
+};
+
+/**
+ * RTT configuration.
+ */
+struct RttConfig {
+    /**
+     * Peer device mac address.
+     */
+    MacAddress addr;
+
+    /**
+     * 1-sided or 2-sided RTT.
+     */
+    RttType type;
+
+    /**
+     * Optional - peer device hint (STA, P2P, AP).
+     */
+    RttPeerType peer;
+
+    /**
+     * Required for STA-AP mode, optional for P2P, NBD etc.
+     */
+    WifiChannelInfo channel;
+
+    /**
+     * Time interval between bursts (units: 100 ms).
+     * Applies to 1-sided and 2-sided RTT multi-burst requests.
+     * Range: 0-31, 0: no preference by initiator (2-sided RTT).
+     */
+    uint32_t burstPeriod;
+
+    /**
+     * Total number of RTT bursts to be executed. It will be
+     * specified in the same way as the parameter "Number of
+     * Burst Exponent" found in the FTM frame format. It
+     * applies to both: 1-sided RTT and 2-sided RTT. Valid
+     * values are 0 to 15 as defined in 802.11mc std.
+     * 0 means single shot
+     * The implication of this parameter on the maximum
+     * number of RTT results is the following:
+     * for 1-sided RTT: max num of RTT results = (2^num_burst)*(num_frames_per_burst)
+     * for 2-sided RTT: max num of RTT results = (2^num_burst)*(num_frames_per_burst - 1)
+     */
+    uint32_t numBurst;
+
+    /**
+     * Num of frames per burst.
+     * Minimum value = 1, Maximum value = 31
+     * For 2-sided this equals the number of FTM frames
+     * to be attempted in a single burst. This also
+     * equals the number of FTM frames that the
+     * initiator will request that the responder send
+     * in a single frame.
+     */
+    uint32_t numFramesPerBurst;
+
+    /**
+     * Number of retries for a failed RTT frame.
+     * Applies to 1-sided RTT only. Minimum value = 0, Maximum value = 3
+     */
+    uint32_t numRetriesPerRttFrame;
+
+    /**
+     * Following fields are only valid for 2-side RTT.
+     *
+     *
+     * Maximum number of retries that the initiator can
+     * retry an FTMR frame.
+     * Minimum value = 0, Maximum value = 3
+     */
+    uint32_t numRetriesPerFtmr;
+
+    /**
+     * Whether to request location civic info or not.
+     */
+    bool mustRequestLci;
+
+    /**
+     * Whether to request location civic records or not.
+     */
+    bool mustRequestLcr;
+
+    /**
+     * Applies to 1-sided and 2-sided RTT. Valid values will
+     * be 2-11 and 15 as specified by the 802.11mc std for
+     * the FTM parameter burst duration. In a multi-burst
+     * request, if responder overrides with larger value,
+     * the initiator will return failure. In a single-burst
+     * request if responder overrides with larger value,
+     * the initiator will sent TMR_STOP to terminate RTT
+     * at the end of the burst_duration it requested.
+     */
+    uint32_t burstDuration;
+
+    /**
+     * RTT preamble to be used in the RTT frames.
+     */
+    RttPreamble preamble;
+
+    /**
+     * RTT BW to be used in the RTT frames.
+     */
+    RttBw bw;
+};
+
+/**
+ * RTT Capabilities.
+ */
+struct RttCapabilities {
+    /**
+     * if 1-sided rtt data collection is supported.
+     */
+    bool rttOneSidedSupported;
+
+    /**
+     * if ftm rtt data collection is supported.
+     */
+    bool rttFtmSupported;
+
+    /**
+     * if initiator supports LCI request. Applies to 2-sided RTT.
+     */
+    bool lciSupported;
+
+    /**
+     * if initiator supports LCR request. Applies to 2-sided RTT.
+     */
+    bool lcrSupported;
+
+    /**
+     * if 11mc responder mode is supported.
+     */
+    bool responderSupported;
+
+    /**
+     * Bit mask indicates what preamble is supported by initiator.
+     * Combination of |RttPreamble| values.
+     */
+    bitfield<RttPreamble> preambleSupport;
+
+    /**
+     * Bit mask indicates what BW is supported by initiator.
+     * Combination of |RttBw| values.
+     */
+    bitfield<RttBw> bwSupport;
+
+    /**
+     * Draft 11mc spec version supported by chip.
+     * For instance, version 4.0 must be 40 and version 4.3 must be 43 etc.
+     */
+    uint8_t mcVersion;
+};
+
+/**
+ * RTT Responder information
+ */
+struct RttResponder {
+    WifiChannelInfo channel;
+
+    RttPreamble preamble;
+};
+
+/**
+ * Wifi rate info.
+ */
+struct WifiRateInfo {
+    /**
+     * Preamble used for RTT measurements.
+     */
+    WifiRatePreamble preamble;
+
+    /**
+     * Number of spatial streams.
+     */
+    WifiRateNss nss;
+
+    /**
+     * Bandwidth of channel.
+     */
+    WifiChannelWidthInMhz bw;
+
+    /**
+     * OFDM/CCK rate code would be as per ieee std in the units of 0.5mbps.
+     * HT/VHT/HE it would be mcs index.
+     */
+    uint8_t rateMcsIdx;
+
+    /**
+     * Bitrate in units of 100 Kbps.
+     */
+    uint32_t bitRateInKbps;
+};
+
+/**
+ * RTT results.
+ */
+struct RttResult {
+    /**
+     * Peer device mac address.
+     */
+    MacAddress addr;
+
+    /**
+     * Burst number in a multi-burst request.
+     */
+    uint32_t burstNum;
+
+    /**
+     * Total RTT measurement frames attempted.
+     */
+    uint32_t measurementNumber;
+
+    /**
+     * Total successful RTT measurement frames.
+     */
+    uint32_t successNumber;
+
+    /**
+     * Maximum number of "FTM frames per burst" supported by
+     * the responder STA. Applies to 2-sided RTT only.
+     * If reponder overrides with larger value:
+     * - for single-burst request initiator will truncate the
+     * larger value and send a TMR_STOP after receiving as
+     * many frames as originally requested.
+     * - for multi-burst request, initiator will return
+     * failure right away.
+     */
+    uint8_t numberPerBurstPeer;
+
+    /**
+     * Ranging status.
+     */
+    RttStatus status;
+
+    /**
+     * When status == RTT_STATUS_FAIL_BUSY_TRY_LATER,
+     * this will be the time provided by the responder as to
+     * when the request can be tried again. Applies to 2-sided
+     * RTT only. In sec, 1-31sec.
+     */
+    uint8_t retryAfterDuration;
+
+    /**
+     * RTT type.
+     */
+    RttType type;
+
+    /**
+     * Average rssi in 0.5 dB steps e.g. 143 implies -71.5 dB.
+     */
+    Rssi rssi;
+
+    /**
+     * Rssi spread in 0.5 dB steps e.g. 5 implies 2.5 dB spread (optional).
+     */
+    Rssi rssiSpread;
+
+    /**
+     * 1-sided RTT: TX rate of RTT frame.
+     * 2-sided RTT: TX rate of initiator's Ack in response to FTM frame.
+     */
+    WifiRateInfo txRate;
+
+    /**
+     * 1-sided RTT: TX rate of Ack from other side.
+     * 2-sided RTT: TX rate of FTM frame coming from responder.
+     */
+    WifiRateInfo rxRate;
+
+    /**
+     * Round trip time in picoseconds
+     */
+    TimeSpanInPs rtt;
+
+    /**
+     * Rtt standard deviation in picoseconds.
+     */
+    TimeSpanInPs rttSd;
+
+    /**
+     * Difference between max and min rtt times recorded in picoseconds.
+     */
+    TimeSpanInPs rttSpread;
+
+    /**
+     * Distance in mm (optional).
+     */
+    int32_t distanceInMm;
+
+    /**
+     * Standard deviation in mm (optional).
+     */
+    int32_t distanceSdInMm;
+
+    /**
+     * Difference between max and min distance recorded in mm (optional).
+     */
+    int32_t distanceSpreadInMm;
+
+    /**
+     * Time of the measurement (in microseconds since boot).
+     */
+    TimeStampInUs timeStampInUs;
+
+    /**
+     * in ms, actual time taken by the FW to finish one burst
+     * measurement. Applies to 1-sided and 2-sided RTT.
+     */
+    uint32_t burstDurationInMs;
+
+    /**
+     * Number of bursts allowed by the responder. Applies
+     * to 2-sided RTT only.
+     */
+    uint32_t negotiatedBurstNum;
+
+    /**
+     * for 11mc only.
+     */
+    WifiInformationElement lci;
+
+    /**
+     * for 11mc only.
+     */
+    WifiInformationElement lcr;
+};