HalTool: Move haltool out of libwifi-system

HalTool is used mainly by test tools and needs to link against
libwifi-hal. So, move this out of libwifi-system to libwifi-hal.
The libwifi-hal folder will get moved out to hardware/interfaces soon.

Bug: 34457880
Test: Compiles & device boots up.
Change-Id: I00ce0ed2c271e8c4e1295d004d0b7479365cb8d7

3 files changed, 619 insertions, 1 deletions

diff --git a/libwifi_hal/Android.mk b/libwifi_hal/Android.mk
index 5fba6ac7f..3199fd58d 100644
--- a/libwifi_hal/Android.mk
+++ b/libwifi_hal/Android.mk
@@ -113,7 +113,8 @@ LOCAL_SHARED_LIBRARIES := \
     libnl \
     libutils
 LOCAL_SRC_FILES := \
-    driver_tool.cpp
+    driver_tool.cpp \
+    hal_tool.cpp
 LOCAL_WHOLE_STATIC_LIBRARIES := $(LIB_WIFI_HAL) libwifi-hal-common
 include $(BUILD_SHARED_LIBRARY)
 
diff --git a/libwifi_hal/hal_tool.cpp b/libwifi_hal/hal_tool.cpp
new file mode 100644
index 000000000..76b57aaa2
--- /dev/null
+++ b/libwifi_hal/hal_tool.cpp
@@ -0,0 +1,578 @@
+/*
+ * 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.
+ */
+
+#include "wifi_hal/hal_tool.h"
+
+#include <android-base/logging.h>
+
+namespace android {
+namespace wifi_system {
+namespace {
+
+wifi_error wifi_initialize_stub(wifi_handle* handle) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+void wifi_cleanup_stub(wifi_handle handle, wifi_cleaned_up_handler handler) {}
+
+void wifi_event_loop_stub(wifi_handle handle) {}
+
+void wifi_get_error_info_stub(wifi_error err, const char** msg) { *msg = NULL; }
+
+wifi_error wifi_get_supported_feature_set_stub(wifi_interface_handle handle,
+                                               feature_set* set) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_get_concurrency_matrix_stub(wifi_interface_handle handle,
+                                            int max_size, feature_set* matrix,
+                                            int* size) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_set_scanning_mac_oui_stub(wifi_interface_handle handle,
+                                          unsigned char* oui_data) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+/* List of all supported channels, including 5GHz channels */
+wifi_error wifi_get_supported_channels_stub(wifi_handle handle, int* size,
+                                            wifi_channel* list) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+/* Enhanced power reporting */
+wifi_error wifi_is_epr_supported_stub(wifi_handle handle) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+/* multiple interface support */
+wifi_error wifi_get_ifaces_stub(wifi_handle handle, int* num_ifaces,
+                                wifi_interface_handle** ifaces) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_get_iface_name_stub(wifi_interface_handle iface, char* name,
+                                    size_t size) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_set_iface_event_handler_stub(wifi_request_id id,
+                                             wifi_interface_handle iface,
+                                             wifi_event_handler eh) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_reset_iface_event_handler_stub(wifi_request_id id,
+                                               wifi_interface_handle iface) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_start_gscan_stub(wifi_request_id id,
+                                 wifi_interface_handle iface,
+                                 wifi_scan_cmd_params params,
+                                 wifi_scan_result_handler handler) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_stop_gscan_stub(wifi_request_id id,
+                                wifi_interface_handle iface) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_get_cached_gscan_results_stub(wifi_interface_handle iface,
+                                              byte flush, int max,
+                                              wifi_cached_scan_results* results,
+                                              int* num) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_set_bssid_hotlist_stub(wifi_request_id id,
+                                       wifi_interface_handle iface,
+                                       wifi_bssid_hotlist_params params,
+                                       wifi_hotlist_ap_found_handler handler) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_reset_bssid_hotlist_stub(wifi_request_id id,
+                                         wifi_interface_handle iface) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_set_significant_change_handler_stub(
+    wifi_request_id id, wifi_interface_handle iface,
+    wifi_significant_change_params params,
+    wifi_significant_change_handler handler) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_reset_significant_change_handler_stub(
+    wifi_request_id id, wifi_interface_handle iface) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_get_gscan_capabilities_stub(
+    wifi_interface_handle handle, wifi_gscan_capabilities* capabilities) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_set_link_stats_stub(wifi_interface_handle iface,
+                                    wifi_link_layer_params params) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_get_link_stats_stub(wifi_request_id id,
+                                    wifi_interface_handle iface,
+                                    wifi_stats_result_handler handler) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_clear_link_stats_stub(wifi_interface_handle iface,
+                                      u32 stats_clear_req_mask,
+                                      u32* stats_clear_rsp_mask, u8 stop_req,
+                                      u8* stop_rsp) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+wifi_error wifi_get_valid_channels_stub(wifi_interface_handle handle, int band,
+                                        int max_channels,
+                                        wifi_channel* channels,
+                                        int* num_channels) {
+  return WIFI_ERROR_UNINITIALIZED;
+}
+
+/* API to request RTT measurement */
+wifi_error wifi_rtt_range_request_stub(wifi_request_id id,
+                                       wifi_interface_handle iface,
+                                       unsigned num_rtt_config,
+                                       wifi_rtt_config rtt_config[],
+                                       wifi_rtt_event_handler handler) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+/* API to cancel RTT measurements */
+wifi_error wifi_rtt_range_cancel_stub(wifi_request_id id,
+                                      wifi_interface_handle iface,
+                                      unsigned num_devices, mac_addr addr[]) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+/* API to get RTT capability */
+wifi_error wifi_get_rtt_capabilities_stub(wifi_interface_handle iface,
+                                          wifi_rtt_capabilities* capabilities) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+/* API to enable RTT responder role */
+wifi_error wifi_enable_responder_stub(wifi_request_id id,
+                                      wifi_interface_handle iface,
+                                      wifi_channel_info channel_hint,
+                                      unsigned max_duration_seconds,
+                                      wifi_channel_info* channel_used) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+/* API to disable RTT responder role */
+wifi_error wifi_disable_responder_stub(wifi_request_id id,
+                                       wifi_interface_handle iface) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+/* API to get available channel for RTT responder role */
+wifi_error wifi_rtt_get_available_channel_stub(wifi_interface_handle iface,
+                                               wifi_channel_info* channel) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_set_nodfs_flag_stub(wifi_interface_handle iface, u32 nodfs) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_start_logging_stub(wifi_interface_handle iface,
+                                   u32 verbose_level, u32 flags,
+                                   u32 max_interval_sec, u32 min_data_size,
+                                   char* buffer_name) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_set_epno_list_stub(int id, wifi_interface_info* iface,
+                                   const wifi_epno_params* params,
+                                   wifi_epno_handler handler) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_reset_epno_list_stub(int id, wifi_interface_info* iface) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_set_country_code_stub(wifi_interface_handle iface,
+                                      const char* code) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_get_firmware_memory_dump_stub(
+    wifi_interface_handle iface, wifi_firmware_memory_dump_handler handler) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_set_log_handler_stub(wifi_request_id id,
+                                     wifi_interface_handle iface,
+                                     wifi_ring_buffer_data_handler handler) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_reset_log_handler_stub(wifi_request_id id,
+                                       wifi_interface_handle iface) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_set_alert_handler_stub(wifi_request_id id,
+                                       wifi_interface_handle iface,
+                                       wifi_alert_handler handler) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_reset_alert_handler_stub(wifi_request_id id,
+                                         wifi_interface_handle iface) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_get_firmware_version_stub(wifi_interface_handle iface,
+                                          char* buffer, int buffer_size) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_get_ring_buffers_status_stub(wifi_interface_handle iface,
+                                             u32* num_rings,
+                                             wifi_ring_buffer_status* status) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_get_logger_supported_feature_set_stub(
+    wifi_interface_handle iface, unsigned int* support) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_get_ring_data_stub(wifi_interface_handle iface,
+                                   char* ring_name) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_get_driver_version_stub(wifi_interface_handle iface,
+                                        char* buffer, int buffer_size) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_enable_tdls_stub(wifi_interface_handle iface, mac_addr addr,
+                                 wifi_tdls_params* params,
+                                 wifi_tdls_handler handler) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_disable_tdls_stub(wifi_interface_handle iface, mac_addr addr) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_get_tdls_status_stub(wifi_interface_handle iface, mac_addr addr,
+                                     wifi_tdls_status* status) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_get_tdls_capabilities_stub(
+    wifi_interface_handle iface, wifi_tdls_capabilities* capabilities) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_start_sending_offloaded_packet_stub(
+    wifi_request_id id, wifi_interface_handle iface, u8* ip_packet,
+    u16 ip_packet_len, u8* src_mac_addr, u8* dst_mac_addr, u32 period_msec) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_stop_sending_offloaded_packet_stub(
+    wifi_request_id id, wifi_interface_handle iface) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_get_wake_reason_stats_stub(
+    wifi_interface_handle iface,
+    WLAN_DRIVER_WAKE_REASON_CNT* wifi_wake_reason_cnt) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_configure_nd_offload_stub(wifi_interface_handle iface,
+                                          u8 enable) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_get_driver_memory_dump_stub(
+    wifi_interface_handle iface, wifi_driver_memory_dump_callbacks callbacks) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_start_pkt_fate_monitoring_stub(wifi_interface_handle iface) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_get_tx_pkt_fates_stub(wifi_interface_handle handle,
+                                      wifi_tx_report* tx_report_bufs,
+                                      size_t n_requested_fates,
+                                      size_t* n_provided_fates) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_get_rx_pkt_fates_stub(wifi_interface_handle handle,
+                                      wifi_rx_report* rx_report_bufs,
+                                      size_t n_requested_fates,
+                                      size_t* n_provided_fates) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+wifi_error wifi_nan_enable_request_stub(transaction_id id,
+                                        wifi_interface_handle iface,
+                                        NanEnableRequest* msg) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_disable_request_stub(transaction_id id,
+                                         wifi_interface_handle iface) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_publish_request_stub(transaction_id id,
+                                         wifi_interface_handle iface,
+                                         NanPublishRequest* msg) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_publish_cancel_request_stub(transaction_id id,
+                                                wifi_interface_handle iface,
+                                                NanPublishCancelRequest* msg) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_subscribe_request_stub(transaction_id id,
+                                           wifi_interface_handle iface,
+                                           NanSubscribeRequest* msg) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_subscribe_cancel_request_stub(
+    transaction_id id, wifi_interface_handle iface,
+    NanSubscribeCancelRequest* msg) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_transmit_followup_request_stub(
+    transaction_id id, wifi_interface_handle iface,
+    NanTransmitFollowupRequest* msg) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_stats_request_stub(transaction_id id,
+                                       wifi_interface_handle iface,
+                                       NanStatsRequest* msg) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_config_request_stub(transaction_id id,
+                                        wifi_interface_handle iface,
+                                        NanConfigRequest* msg) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_tca_request_stub(transaction_id id,
+                                     wifi_interface_handle iface,
+                                     NanTCARequest* msg) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_beacon_sdf_payload_request_stub(
+    transaction_id id, wifi_interface_handle iface,
+    NanBeaconSdfPayloadRequest* msg) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_register_handler_stub(wifi_interface_handle iface,
+                                          NanCallbackHandler handlers) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_get_version_stub(wifi_handle handle, NanVersion* version) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_get_capabilities_stub(transaction_id id,
+                                          wifi_interface_handle iface) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_data_interface_create_stub(transaction_id id,
+                                               wifi_interface_handle iface,
+                                               char* iface_name) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_data_interface_delete_stub(transaction_id id,
+                                               wifi_interface_handle iface,
+                                               char* iface_name) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_data_request_initiator_stub(
+    transaction_id id, wifi_interface_handle iface,
+    NanDataPathInitiatorRequest* msg) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_data_indication_response_stub(
+    transaction_id id, wifi_interface_handle iface,
+    NanDataPathIndicationResponse* msg) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_nan_data_end_stub(transaction_id id,
+                                  wifi_interface_handle iface,
+                                  NanDataPathEndRequest* msg) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_get_packet_filter_capabilities_stub(
+    wifi_interface_handle handle, u32* version, u32* max_len) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+wifi_error wifi_set_packet_filter_stub(wifi_interface_handle handle,
+                                       const u8* program, u32 len) {
+  return WIFI_ERROR_NOT_SUPPORTED;
+}
+
+bool init_wifi_stub_hal_func_table(wifi_hal_fn* hal_fn) {
+  if (hal_fn == NULL) {
+    return false;
+  }
+  hal_fn->wifi_initialize = wifi_initialize_stub;
+  hal_fn->wifi_cleanup = wifi_cleanup_stub;
+  hal_fn->wifi_event_loop = wifi_event_loop_stub;
+  hal_fn->wifi_get_error_info = wifi_get_error_info_stub;
+  hal_fn->wifi_get_supported_feature_set = wifi_get_supported_feature_set_stub;
+  hal_fn->wifi_get_concurrency_matrix = wifi_get_concurrency_matrix_stub;
+  hal_fn->wifi_set_scanning_mac_oui = wifi_set_scanning_mac_oui_stub;
+  hal_fn->wifi_get_supported_channels = wifi_get_supported_channels_stub;
+  hal_fn->wifi_is_epr_supported = wifi_is_epr_supported_stub;
+  hal_fn->wifi_get_ifaces = wifi_get_ifaces_stub;
+  hal_fn->wifi_get_iface_name = wifi_get_iface_name_stub;
+  hal_fn->wifi_reset_iface_event_handler = wifi_reset_iface_event_handler_stub;
+  hal_fn->wifi_start_gscan = wifi_start_gscan_stub;
+  hal_fn->wifi_stop_gscan = wifi_stop_gscan_stub;
+  hal_fn->wifi_get_cached_gscan_results = wifi_get_cached_gscan_results_stub;
+  hal_fn->wifi_set_bssid_hotlist = wifi_set_bssid_hotlist_stub;
+  hal_fn->wifi_reset_bssid_hotlist = wifi_reset_bssid_hotlist_stub;
+  hal_fn->wifi_set_significant_change_handler =
+      wifi_set_significant_change_handler_stub;
+  hal_fn->wifi_reset_significant_change_handler =
+      wifi_reset_significant_change_handler_stub;
+  hal_fn->wifi_get_gscan_capabilities = wifi_get_gscan_capabilities_stub;
+  hal_fn->wifi_set_link_stats = wifi_set_link_stats_stub;
+  hal_fn->wifi_get_link_stats = wifi_get_link_stats_stub;
+  hal_fn->wifi_clear_link_stats = wifi_clear_link_stats_stub;
+  hal_fn->wifi_get_valid_channels = wifi_get_valid_channels_stub;
+  hal_fn->wifi_rtt_range_request = wifi_rtt_range_request_stub;
+  hal_fn->wifi_rtt_range_cancel = wifi_rtt_range_cancel_stub;
+  hal_fn->wifi_get_rtt_capabilities = wifi_get_rtt_capabilities_stub;
+  hal_fn->wifi_start_logging = wifi_start_logging_stub;
+  hal_fn->wifi_set_epno_list = wifi_set_epno_list_stub;
+  hal_fn->wifi_set_country_code = wifi_set_country_code_stub;
+  hal_fn->wifi_enable_tdls = wifi_enable_tdls_stub;
+  hal_fn->wifi_disable_tdls = wifi_disable_tdls_stub;
+  hal_fn->wifi_get_tdls_status = wifi_get_tdls_status_stub;
+  hal_fn->wifi_get_tdls_capabilities = wifi_get_tdls_capabilities_stub;
+  hal_fn->wifi_set_nodfs_flag = wifi_set_nodfs_flag_stub;
+  hal_fn->wifi_get_firmware_memory_dump = wifi_get_firmware_memory_dump_stub;
+  hal_fn->wifi_set_log_handler = wifi_set_log_handler_stub;
+  hal_fn->wifi_reset_log_handler = wifi_reset_log_handler_stub;
+  hal_fn->wifi_set_alert_handler = wifi_set_alert_handler_stub;
+  hal_fn->wifi_reset_alert_handler = wifi_reset_alert_handler_stub;
+  hal_fn->wifi_get_firmware_version = wifi_get_firmware_version_stub;
+  hal_fn->wifi_get_ring_buffers_status = wifi_get_ring_buffers_status_stub;
+  hal_fn->wifi_get_logger_supported_feature_set =
+      wifi_get_logger_supported_feature_set_stub;
+  hal_fn->wifi_get_ring_data = wifi_get_ring_data_stub;
+  hal_fn->wifi_get_driver_version = wifi_get_driver_version_stub;
+  hal_fn->wifi_start_sending_offloaded_packet =
+      wifi_start_sending_offloaded_packet_stub;
+  hal_fn->wifi_stop_sending_offloaded_packet =
+      wifi_stop_sending_offloaded_packet_stub;
+  hal_fn->wifi_get_wake_reason_stats = wifi_get_wake_reason_stats_stub;
+  hal_fn->wifi_configure_nd_offload = wifi_configure_nd_offload_stub;
+  hal_fn->wifi_get_driver_memory_dump = wifi_get_driver_memory_dump_stub;
+  hal_fn->wifi_start_pkt_fate_monitoring = wifi_start_pkt_fate_monitoring_stub;
+  hal_fn->wifi_get_tx_pkt_fates = wifi_get_tx_pkt_fates_stub;
+  hal_fn->wifi_get_rx_pkt_fates = wifi_get_rx_pkt_fates_stub;
+  hal_fn->wifi_nan_enable_request = wifi_nan_enable_request_stub;
+  hal_fn->wifi_nan_disable_request = wifi_nan_disable_request_stub;
+  hal_fn->wifi_nan_publish_request = wifi_nan_publish_request_stub;
+  hal_fn->wifi_nan_publish_cancel_request =
+      wifi_nan_publish_cancel_request_stub;
+  hal_fn->wifi_nan_subscribe_request = wifi_nan_subscribe_request_stub;
+  hal_fn->wifi_nan_subscribe_cancel_request =
+      wifi_nan_subscribe_cancel_request_stub;
+  hal_fn->wifi_nan_transmit_followup_request =
+      wifi_nan_transmit_followup_request_stub;
+  hal_fn->wifi_nan_stats_request = wifi_nan_stats_request_stub;
+  hal_fn->wifi_nan_config_request = wifi_nan_config_request_stub;
+  hal_fn->wifi_nan_tca_request = wifi_nan_tca_request_stub;
+  hal_fn->wifi_nan_beacon_sdf_payload_request =
+      wifi_nan_beacon_sdf_payload_request_stub;
+  hal_fn->wifi_nan_register_handler = wifi_nan_register_handler_stub;
+  hal_fn->wifi_nan_get_version = wifi_nan_get_version_stub;
+  hal_fn->wifi_nan_get_capabilities = wifi_nan_get_capabilities_stub;
+  hal_fn->wifi_nan_data_interface_create = wifi_nan_data_interface_create_stub;
+  hal_fn->wifi_nan_data_interface_delete = wifi_nan_data_interface_delete_stub;
+  hal_fn->wifi_nan_data_request_initiator =
+      wifi_nan_data_request_initiator_stub;
+  hal_fn->wifi_nan_data_indication_response =
+      wifi_nan_data_indication_response_stub;
+  hal_fn->wifi_nan_data_end = wifi_nan_data_end_stub;
+  hal_fn->wifi_get_packet_filter_capabilities =
+      wifi_get_packet_filter_capabilities_stub;
+  hal_fn->wifi_set_packet_filter = wifi_set_packet_filter_stub;
+
+  return true;
+}
+
+}  // namespace
+
+bool HalTool::InitFunctionTable(wifi_hal_fn* hal_fn) {
+  if (!init_wifi_stub_hal_func_table(hal_fn)) {
+    LOG(ERROR) << "Can not initialize the basic function pointer table";
+    return false;
+  }
+
+  if (init_wifi_vendor_hal_func_table(hal_fn) != WIFI_SUCCESS) {
+    LOG(ERROR) << "Can not initialize the vendor function pointer table";
+    return false;
+  }
+
+  return true;
+}
+
+bool HalTool::CanGetValidChannels(wifi_hal_fn* hal_fn) {
+  return hal_fn &&
+         (hal_fn->wifi_get_valid_channels != wifi_get_valid_channels_stub);
+}
+
+}  // namespace wifi_system
+}  // namespace android
diff --git a/libwifi_hal/include/wifi_hal/hal_tool.h b/libwifi_hal/include/wifi_hal/hal_tool.h
new file mode 100644
index 000000000..b25893e15
--- /dev/null
+++ b/libwifi_hal/include/wifi_hal/hal_tool.h
@@ -0,0 +1,39 @@
+/*
+ * 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 ANDROID_WIFI_SYSTEM_HAL_TOOL_H
+#define ANDROID_WIFI_SYSTEM_HAL_TOOL_H
+
+#include <hardware_legacy/wifi_hal.h>
+
+namespace android {
+namespace wifi_system {
+
+// Utilities for interacting with the HAL.
+class HalTool {
+ public:
+  HalTool() = default;
+  virtual ~HalTool() = default;
+
+  virtual bool InitFunctionTable(wifi_hal_fn* hal_fn);
+
+  virtual bool CanGetValidChannels(wifi_hal_fn* hal_fn);
+};  // class HalTool
+
+}  // namespace wifi_system
+}  // namespace android
+
+#endif  // ANDROID_WIFI_SYSTEM_HAL_TOOL_H