1.文件路径

/hardware/interfaces/wifi/1.0/IWifi.hal

/** Copyright 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.*/package android.hardware.wifi@1.0;import IWifiChip;
import IWifiEventCallback;/*** This is the root of the HAL module and is the interface returned when* loading an implementation of the Wi-Fi HAL. There must be at most one* module loaded in the system.*/
interface IWifi {/*** Requests notifications of significant events for the HAL. Multiple calls to* this must register multiple callbacks each of which must receive all* events. |IWifiEventCallback| object registration must be independent of the* state of the rest of the HAL and must persist though stops/starts. These* objects must be deleted when the corresponding client process is dead.** @param callback An instance of the |IWifiEventCallback| HIDL interface*        object.* @return status WifiStatus of the operation.*         Possible status codes:*         |WifiStatusCode.SUCCESS|,*         |WifiStatusCode.UNKNOWN|*/@entry@callflow(next={"*"})registerEventCallback(IWifiEventCallback callback)generates (WifiStatus status);/*** Get the current state of the HAL.** @return started true if started, false otherwise.*/isStarted() generates (bool started);/*** Perform any setup that is required to make use of the module. If the module* is already started then this must be a noop.* Must trigger |IWifiEventCallback.onStart| on success.** @return status WifiStatus of the operation.*         Possible status codes:*         |WifiStatusCode.SUCCESS|,*         |WifiStatusCode.NOT_AVAILABLE|,*         |WifiStatusCode.UNKNOWN|*/@entry@callflow(next={"registerEventCallback", "start", "stop", "getChip"})start() generates (WifiStatus status);/*** Tear down any state, ongoing commands, etc. If the module is already* stopped then this must be a noop. If the HAL is already stopped or it* succeeds then onStop must be called. After calling this all IWifiChip* objects will be considered invalid.* Must trigger |IWifiEventCallback.onStop| on success.* Must trigger |IWifiEventCallback.onFailure| on failure.** Calling stop then start is a valid way of resetting state in the HAL,* driver, firmware.** @return status WifiStatus of the operation.*         Possible status codes:*         |WifiStatusCode.SUCCESS|,*         |WifiStatusCode.NOT_STARTED|,*         |WifiStatusCode.UNKNOWN|*/@exit@callflow(next={"registerEventCallback", "start", "stop"})stop() generates (WifiStatus status);/*** Retrieve the list of all chip Id's on the device.* The corresponding |IWifiChip| object for any chip can be* retrieved using |getChip| method.** @return status WifiStatus of the operation.*         Possible status codes:*         |WifiStatusCode.SUCCESS|,*         |WifiStatusCode.NOT_STARTED|,*         |WifiStatusCode.UNKNOWN|* @return chipIds List of all chip Id's on the device.*/@callflow(next={"*"})getChipIds() generates (WifiStatus status, vec<ChipId> chipIds);/*** Gets a HIDL interface object for the chip corresponding to the* provided chipId.** @return status WifiStatus of the operation.*         Possible status codes:*         |WifiStatusCode.SUCCESS|,*         |WifiStatusCode.NOT_STARTED|,*         |WifiStatusCode.UNKNOWN|* @return chip HIDL interface object representing the chip.*/@callflow(next={"*"})getChip(ChipId chipId) generates (WifiStatus status, IWifiChip chip);
};

看起来也挺简单的，就是定义了一些未实现的接口，和接口定义差不多。

2.对应Android.bp文件

// This file is autogenerated by hidl-gen. Do not edit manually.filegroup {name: "android.hardware.wifi@1.0_hal",srcs: ["types.hal","IWifi.hal","IWifiApIface.hal","IWifiChip.hal","IWifiChipEventCallback.hal","IWifiEventCallback.hal","IWifiIface.hal","IWifiNanIface.hal","IWifiNanIfaceEventCallback.hal","IWifiP2pIface.hal","IWifiRttController.hal","IWifiRttControllerEventCallback.hal","IWifiStaIface.hal","IWifiStaIfaceEventCallback.hal",],
}genrule {name: "android.hardware.wifi@1.0_genc++",tools: ["hidl-gen"],cmd: "$(location hidl-gen) -o $(genDir) -Lc++-sources -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.wifi@1.0",srcs: [":android.hardware.wifi@1.0_hal",],out: ["android/hardware/wifi/1.0/types.cpp","android/hardware/wifi/1.0/WifiAll.cpp","android/hardware/wifi/1.0/WifiApIfaceAll.cpp","android/hardware/wifi/1.0/WifiChipAll.cpp","android/hardware/wifi/1.0/WifiChipEventCallbackAll.cpp","android/hardware/wifi/1.0/WifiEventCallbackAll.cpp","android/hardware/wifi/1.0/WifiIfaceAll.cpp","android/hardware/wifi/1.0/WifiNanIfaceAll.cpp","android/hardware/wifi/1.0/WifiNanIfaceEventCallbackAll.cpp","android/hardware/wifi/1.0/WifiP2pIfaceAll.cpp","android/hardware/wifi/1.0/WifiRttControllerAll.cpp","android/hardware/wifi/1.0/WifiRttControllerEventCallbackAll.cpp","android/hardware/wifi/1.0/WifiStaIfaceAll.cpp","android/hardware/wifi/1.0/WifiStaIfaceEventCallbackAll.cpp",],
}genrule {name: "android.hardware.wifi@1.0_genc++_headers",tools: ["hidl-gen"],cmd: "$(location hidl-gen) -o $(genDir) -Lc++-headers -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.wifi@1.0",srcs: [":android.hardware.wifi@1.0_hal",],out: ["android/hardware/wifi/1.0/types.h","android/hardware/wifi/1.0/hwtypes.h","android/hardware/wifi/1.0/IWifi.h","android/hardware/wifi/1.0/IHwWifi.h","android/hardware/wifi/1.0/BnHwWifi.h","android/hardware/wifi/1.0/BpHwWifi.h","android/hardware/wifi/1.0/BsWifi.h","android/hardware/wifi/1.0/IWifiApIface.h","android/hardware/wifi/1.0/IHwWifiApIface.h","android/hardware/wifi/1.0/BnHwWifiApIface.h","android/hardware/wifi/1.0/BpHwWifiApIface.h","android/hardware/wifi/1.0/BsWifiApIface.h","android/hardware/wifi/1.0/IWifiChip.h","android/hardware/wifi/1.0/IHwWifiChip.h","android/hardware/wifi/1.0/BnHwWifiChip.h","android/hardware/wifi/1.0/BpHwWifiChip.h","android/hardware/wifi/1.0/BsWifiChip.h","android/hardware/wifi/1.0/IWifiChipEventCallback.h","android/hardware/wifi/1.0/IHwWifiChipEventCallback.h","android/hardware/wifi/1.0/BnHwWifiChipEventCallback.h","android/hardware/wifi/1.0/BpHwWifiChipEventCallback.h","android/hardware/wifi/1.0/BsWifiChipEventCallback.h","android/hardware/wifi/1.0/IWifiEventCallback.h","android/hardware/wifi/1.0/IHwWifiEventCallback.h","android/hardware/wifi/1.0/BnHwWifiEventCallback.h","android/hardware/wifi/1.0/BpHwWifiEventCallback.h","android/hardware/wifi/1.0/BsWifiEventCallback.h","android/hardware/wifi/1.0/IWifiIface.h","android/hardware/wifi/1.0/IHwWifiIface.h","android/hardware/wifi/1.0/BnHwWifiIface.h","android/hardware/wifi/1.0/BpHwWifiIface.h","android/hardware/wifi/1.0/BsWifiIface.h","android/hardware/wifi/1.0/IWifiNanIface.h","android/hardware/wifi/1.0/IHwWifiNanIface.h","android/hardware/wifi/1.0/BnHwWifiNanIface.h","android/hardware/wifi/1.0/BpHwWifiNanIface.h","android/hardware/wifi/1.0/BsWifiNanIface.h","android/hardware/wifi/1.0/IWifiNanIfaceEventCallback.h","android/hardware/wifi/1.0/IHwWifiNanIfaceEventCallback.h","android/hardware/wifi/1.0/BnHwWifiNanIfaceEventCallback.h","android/hardware/wifi/1.0/BpHwWifiNanIfaceEventCallback.h","android/hardware/wifi/1.0/BsWifiNanIfaceEventCallback.h","android/hardware/wifi/1.0/IWifiP2pIface.h","android/hardware/wifi/1.0/IHwWifiP2pIface.h","android/hardware/wifi/1.0/BnHwWifiP2pIface.h","android/hardware/wifi/1.0/BpHwWifiP2pIface.h","android/hardware/wifi/1.0/BsWifiP2pIface.h","android/hardware/wifi/1.0/IWifiRttController.h","android/hardware/wifi/1.0/IHwWifiRttController.h","android/hardware/wifi/1.0/BnHwWifiRttController.h","android/hardware/wifi/1.0/BpHwWifiRttController.h","android/hardware/wifi/1.0/BsWifiRttController.h","android/hardware/wifi/1.0/IWifiRttControllerEventCallback.h","android/hardware/wifi/1.0/IHwWifiRttControllerEventCallback.h","android/hardware/wifi/1.0/BnHwWifiRttControllerEventCallback.h","android/hardware/wifi/1.0/BpHwWifiRttControllerEventCallback.h","android/hardware/wifi/1.0/BsWifiRttControllerEventCallback.h","android/hardware/wifi/1.0/IWifiStaIface.h","android/hardware/wifi/1.0/IHwWifiStaIface.h","android/hardware/wifi/1.0/BnHwWifiStaIface.h","android/hardware/wifi/1.0/BpHwWifiStaIface.h","android/hardware/wifi/1.0/BsWifiStaIface.h","android/hardware/wifi/1.0/IWifiStaIfaceEventCallback.h","android/hardware/wifi/1.0/IHwWifiStaIfaceEventCallback.h","android/hardware/wifi/1.0/BnHwWifiStaIfaceEventCallback.h","android/hardware/wifi/1.0/BpHwWifiStaIfaceEventCallback.h","android/hardware/wifi/1.0/BsWifiStaIfaceEventCallback.h",],
}cc_library {name: "android.hardware.wifi@1.0",defaults: ["hidl-module-defaults"],generated_sources: ["android.hardware.wifi@1.0_genc++"],generated_headers: ["android.hardware.wifi@1.0_genc++_headers"],export_generated_headers: ["android.hardware.wifi@1.0_genc++_headers"],vendor_available: true,vndk: {enabled: true,},shared_libs: ["libhidlbase","libhidltransport","libhwbinder","liblog","libutils","libcutils",],export_shared_lib_headers: ["libhidlbase","libhidltransport","libhwbinder","libutils",],
}

简单地看下这个Android.bp文件：

filegroup-"android.hardware.wifi@1.0_hal"：包含了该目录下所有的hal文件

genrule-"android.hardware.wifi@1.0_genc++"：使用上面的filegroup作为src编译出对应的cpp文件

genrule-"android.hardware.wifi@1.0_genc++_headers"：使用上面的filegroup作为src编译出对应的.h文件

之后下面的抬头“android.hardware.wifi@1.0”经常看到，调用到wifi hal的都会声明到这个。

cc_library {name: "android.hardware.wifi@1.0",defaults: ["hidl-module-defaults"],generated_sources: ["android.hardware.wifi@1.0_genc++"],generated_headers: ["android.hardware.wifi@1.0_genc++_headers"],export_generated_headers: ["android.hardware.wifi@1.0_genc++_headers"],vendor_available: true,vndk: {enabled: true,},shared_libs: ["libhidlbase","libhidltransport","libhwbinder","liblog","libutils","libcutils",],export_shared_lib_headers: ["libhidlbase","libhidltransport","libhwbinder","libutils",],
}

2.1 hidl-gen

注意到Android.bp文件中有如下命令是可以生成对应资源的，试一试。

cmd: "$(location hidl-gen) -o $(genDir) -Lc++-headers -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.wifi@1.0"

先期准备

1)source build/envsetup.sh2)lunch3)make hidl-gen -j4//[100% 460/460] Install: out/host/linux-x86/bin/hidl-gen

2.1.1 生成c++-sources

cmd: "$(location hidl-gen) -o $(genDir) -Lc++-sources -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.wifi@1.0"

2.1.2 生成c++-headers

cmd: "$(location hidl-gen) -o $(genDir) -Lc++-headers -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.wifi@1.0"

2.1.3 生成Android.bp

cmd: "$(location hidl-gen) -o $(genDir) -Landroidbp -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.wifi@1.0"

生成的Android.bp文件是和之前一摸一样的。

2.1.4 生成Android.mk

2.1.5 生成androidbp-impl

hidl-gen -o ./test_hidl_wifi/ -Landroidbp-impl -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.wifi@1.0

cc_library_shared {name: "android.hardware.wifi@1.0-impl",relative_install_path: "hw",proprietary: true,srcs: ["Wifi.cpp","WifiApIface.cpp","WifiChip.cpp","WifiChipEventCallback.cpp","WifiEventCallback.cpp","WifiIface.cpp","WifiNanIface.cpp","WifiNanIfaceEventCallback.cpp","WifiP2pIface.cpp","WifiRttController.cpp","WifiRttControllerEventCallback.cpp","WifiStaIface.cpp","WifiStaIfaceEventCallback.cpp",],shared_libs: ["libhidlbase","libhidltransport","libutils","android.hardware.wifi@1.0",],
}

2.1.6 生成c++-impl

生成HIDL的默认实现。

看下Wifi.h和Wifi.cpp

#ifndef ANDROID_HARDWARE_WIFI_V1_0_WIFI_H
#define ANDROID_HARDWARE_WIFI_V1_0_WIFI_H#include <android/hardware/wifi/1.0/IWifi.h>
#include <hidl/MQDescriptor.h>
#include <hidl/Status.h>namespace android {
namespace hardware {
namespace wifi {
namespace V1_0 {
namespace implementation {using ::android::hardware::hidl_array;
using ::android::hardware::hidl_memory;
using ::android::hardware::hidl_string;
using ::android::hardware::hidl_vec;
using ::android::hardware::Return;
using ::android::hardware::Void;
using ::android::sp;struct Wifi : public IWifi {// Methods from IWifi follow.Return<void> registerEventCallback(const sp<IWifiEventCallback>& callback, registerEventCallback_cb _hidl_cb) override;Return<bool> isStarted() override;Return<void> start(start_cb _hidl_cb) override;Return<void> stop(stop_cb _hidl_cb) override;Return<void> getChipIds(getChipIds_cb _hidl_cb) override;Return<void> getChip(uint32_t chipId, getChip_cb _hidl_cb) override;// Methods from ::android::hidl::base::V1_0::IBase follow.};// FIXME: most likely delete, this is only for passthrough implementations
// extern "C" IWifi* HIDL_FETCH_IWifi(const char* name);}  // namespace implementation
}  // namespace V1_0
}  // namespace wifi
}  // namespace hardware
}  // namespace android#endif  // ANDROID_HARDWARE_WIFI_V1_0_WIFI_H

#include "Wifi.h"namespace android {
namespace hardware {
namespace wifi {
namespace V1_0 {
namespace implementation {// Methods from IWifi follow.
Return<void> Wifi::registerEventCallback(const sp<IWifiEventCallback>& callback, registerEventCallback_cb _hidl_cb) {// TODO implementreturn Void();
}Return<bool> Wifi::isStarted() {// TODO implementreturn bool {};
}Return<void> Wifi::start(start_cb _hidl_cb) {// TODO implementreturn Void();
}Return<void> Wifi::stop(stop_cb _hidl_cb) {// TODO implementreturn Void();
}Return<void> Wifi::getChipIds(getChipIds_cb _hidl_cb) {// TODO implementreturn Void();
}Return<void> Wifi::getChip(uint32_t chipId, getChip_cb _hidl_cb) {// TODO implementreturn Void();
}// Methods from ::android::hidl::base::V1_0::IBase follow.//IWifi* HIDL_FETCH_IWifi(const char* /* name */) {
//    return new Wifi();
//}}  // namespace implementation
}  // namespace V1_0
}  // namespace wifi
}  // namespace hardware
}  // namespace android

都是空实现，结合hidl是framework和vendor的桥梁，所以实现应该是由vendor实现的?1.1的wifi hal版本中有默认的实现。

/** 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 <android-base/logging.h>#include "hidl_return_util.h"
#include "wifi.h"
#include "wifi_status_util.h"namespace {
// Chip ID to use for the only supported chip.
static constexpr android::hardware::wifi::V1_0::ChipId kChipId = 0;
}  // namespacenamespace android {
namespace hardware {
namespace wifi {
namespace V1_1 {
namespace implementation {
using hidl_return_util::validateAndCall;
using hidl_return_util::validateAndCallWithLock;Wifi::Wifi(): legacy_hal_(new legacy_hal::WifiLegacyHal()),mode_controller_(new mode_controller::WifiModeController()),run_state_(RunState::STOPPED) {}bool Wifi::isValid() {// This object is always valid.return true;
}Return<void> Wifi::registerEventCallback(const sp<IWifiEventCallback>& event_callback,registerEventCallback_cb hidl_status_cb) {return validateAndCall(this,WifiStatusCode::ERROR_UNKNOWN,&Wifi::registerEventCallbackInternal,hidl_status_cb,event_callback);
}Return<bool> Wifi::isStarted() {return run_state_ != RunState::STOPPED;
}Return<void> Wifi::start(start_cb hidl_status_cb) {return validateAndCall(this,WifiStatusCode::ERROR_UNKNOWN,&Wifi::startInternal,hidl_status_cb);
}Return<void> Wifi::stop(stop_cb hidl_status_cb) {return validateAndCallWithLock(this, WifiStatusCode::ERROR_UNKNOWN,&Wifi::stopInternal, hidl_status_cb);
}Return<void> Wifi::getChipIds(getChipIds_cb hidl_status_cb) {return validateAndCall(this,WifiStatusCode::ERROR_UNKNOWN,&Wifi::getChipIdsInternal,hidl_status_cb);
}Return<void> Wifi::getChip(ChipId chip_id, getChip_cb hidl_status_cb) {return validateAndCall(this,WifiStatusCode::ERROR_UNKNOWN,&Wifi::getChipInternal,hidl_status_cb,chip_id);
}WifiStatus Wifi::registerEventCallbackInternal(const sp<IWifiEventCallback>& event_callback) {if (!event_cb_handler_.addCallback(event_callback)) {return createWifiStatus(WifiStatusCode::ERROR_UNKNOWN);}return createWifiStatus(WifiStatusCode::SUCCESS);
}WifiStatus Wifi::startInternal() {if (run_state_ == RunState::STARTED) {return createWifiStatus(WifiStatusCode::SUCCESS);} else if (run_state_ == RunState::STOPPING) {return createWifiStatus(WifiStatusCode::ERROR_NOT_AVAILABLE,"HAL is stopping");}WifiStatus wifi_status = initializeLegacyHal();if (wifi_status.code == WifiStatusCode::SUCCESS) {// Create the chip instance once the HAL is started.chip_ = new WifiChip(kChipId, legacy_hal_, mode_controller_);run_state_ = RunState::STARTED;for (const auto& callback : event_cb_handler_.getCallbacks()) {if (!callback->onStart().isOk()) {LOG(ERROR) << "Failed to invoke onStart callback";};}LOG(INFO) << "Wifi HAL started";} else {for (const auto& callback : event_cb_handler_.getCallbacks()) {if (!callback->onFailure(wifi_status).isOk()) {LOG(ERROR) << "Failed to invoke onFailure callback";}}LOG(ERROR) << "Wifi HAL start failed";}return wifi_status;
}WifiStatus Wifi::stopInternal(/* NONNULL */ std::unique_lock<std::recursive_mutex>* lock) {if (run_state_ == RunState::STOPPED) {return createWifiStatus(WifiStatusCode::SUCCESS);} else if (run_state_ == RunState::STOPPING) {return createWifiStatus(WifiStatusCode::ERROR_NOT_AVAILABLE,"HAL is stopping");}// Clear the chip object and its child objects since the HAL is now// stopped.if (chip_.get()) {chip_->invalidate();chip_.clear();}WifiStatus wifi_status = stopLegacyHalAndDeinitializeModeController(lock);if (wifi_status.code == WifiStatusCode::SUCCESS) {for (const auto& callback : event_cb_handler_.getCallbacks()) {if (!callback->onStop().isOk()) {LOG(ERROR) << "Failed to invoke onStop callback";};}LOG(INFO) << "Wifi HAL stopped";} else {for (const auto& callback : event_cb_handler_.getCallbacks()) {if (!callback->onFailure(wifi_status).isOk()) {LOG(ERROR) << "Failed to invoke onFailure callback";}}LOG(ERROR) << "Wifi HAL stop failed";}return wifi_status;
}std::pair<WifiStatus, std::vector<ChipId>> Wifi::getChipIdsInternal() {std::vector<ChipId> chip_ids;if (chip_.get()) {chip_ids.emplace_back(kChipId);}return {createWifiStatus(WifiStatusCode::SUCCESS), std::move(chip_ids)};
}std::pair<WifiStatus, sp<IWifiChip>> Wifi::getChipInternal(ChipId chip_id) {if (!chip_.get()) {return {createWifiStatus(WifiStatusCode::ERROR_NOT_STARTED), nullptr};}if (chip_id != kChipId) {return {createWifiStatus(WifiStatusCode::ERROR_INVALID_ARGS), nullptr};}return {createWifiStatus(WifiStatusCode::SUCCESS), chip_};
}WifiStatus Wifi::initializeLegacyHal() {legacy_hal::wifi_error legacy_status = legacy_hal_->initialize();if (legacy_status != legacy_hal::WIFI_SUCCESS) {LOG(ERROR) << "Failed to initialize legacy HAL: "<< legacyErrorToString(legacy_status);return createWifiStatusFromLegacyError(legacy_status);}return createWifiStatus(WifiStatusCode::SUCCESS);
}WifiStatus Wifi::stopLegacyHalAndDeinitializeModeController(/* NONNULL */ std::unique_lock<std::recursive_mutex>* lock) {run_state_ = RunState::STOPPING;legacy_hal::wifi_error legacy_status =legacy_hal_->stop(lock, [&]() { run_state_ = RunState::STOPPED; });if (legacy_status != legacy_hal::WIFI_SUCCESS) {LOG(ERROR) << "Failed to stop legacy HAL: "<< legacyErrorToString(legacy_status);return createWifiStatusFromLegacyError(legacy_status);}if (!mode_controller_->deinitialize()) {LOG(ERROR) << "Failed to deinitialize firmware mode controller";return createWifiStatus(WifiStatusCode::ERROR_UNKNOWN);}return createWifiStatus(WifiStatusCode::SUCCESS);
}
}  // namespace implementation
}  // namespace V1_1
}  // namespace wifi
}  // namespace hardware
}  // namespace android

2.1.7 生成hash

/aosp/android_aosp/hardware/interfaces$ vim current.txt

默认与WiFi相关的hash如下所示：

b9be36719a8ad534000a51ea07be91be94c405bf1e038ae825acf65087ffd378 android.hardware.wifi@1.0::IWifi
ee0224ee18813506d9d6f13d8c8e4679f053c290a443a52a7c52a5d3c852262b android.hardware.wifi@1.0::IWifiApIface
f3eecc489deb4c74892f59eb7adb769063bd5c354ac132b626a5f42b363d36bc android.hardware.wifi@1.0::IWifiChip
a1b988377645a58e5e2542ca2bad4e17c21a4a389213d05de2f0e32d57b7d339 android.hardware.wifi@1.0::IWifiChipEventCallback
5ed6760ce77e84bc6c49d1acb3f7d8117c9176b3f06514bc44ad3af84c80dcfe android.hardware.wifi@1.0::IWifiEventCallback
6b9ad43a5efbe6ca214f751e22ce43cf5cd4d5d5f2cba80f24ccd3755a72401c android.hardware.wifi@1.0::IWifiIface
ba5aa74f1ba714f0093864227923492808795bda6199c4ea0891322d27f8c931 android.hardware.wifi@1.0::IWifiNanIface
325c94f3e1a565b56bbc74faddbd0ba7cb824f263dccf9dfff2daf62b86ed774 android.hardware.wifi@1.0::IWifiNanIfaceEventCallback
c2c3f0372b41780fb6dfe83c022296806c2024d7046682fd201de5aa9b791c7a android.hardware.wifi@1.0::IWifiP2pIface
766e9765f5c9c759b2a763c2288353fb5deff3389c2cc28f81d79c939704ce8b android.hardware.wifi@1.0::IWifiRttController
72ab6f3e120cbf07aa6f8e87ca89112bdeb36b7fbb96bce5af3712323ab8b8e6 android.hardware.wifi@1.0::IWifiRttControllerEventCallback
3b8093d39ef1e10e43c5538afbf5ff6e39b8d8168ebbe1998d993e89e25f14a5 android.hardware.wifi@1.0::IWifiStaIface
7fbfc551c3e23c8b4398c3e16e452b516457e6921424a53474cbf373ca306fa9 android.hardware.wifi@1.0::IWifiStaIfaceEventCallback
e20d5132d6d23e072c15de065b5e2aa13ff965031246a2c82581732bae56bf6d android.hardware.wifi@1.0::types
f7e55c08187d8c855068a1ee3d0c8daeee7570292d96509c21a8756d4f5cfb9b android.hardware.wifi.supplicant@1.0::ISupplicant
56b5c7267cb3d3337f44eb8b0b38ff4c6260dcc70e07687fcab94b1ccea8d159 android.hardware.wifi.supplicant@1.0::ISupplicantCallback
35ba7bcdf18f24a866a7e5429548f06768bb20a257f75b10a397c4d825ef8438 android.hardware.wifi.supplicant@1.0::ISupplicantIface
cda01008c06922fa37c1213e9bb831a109b3174532805616fb7161edc403866f android.hardware.wifi.supplicant@1.0::ISupplicantNetwork
4907410338c5e8dbeec4b5edc2608ea323f5561945f8810af81810c47b019184 android.hardware.wifi.supplicant@1.0::ISupplicantP2pIface
8b63f5efa2e3be3a7cb8a428760d82285a4ab79bcbdea6ef90aa547555e582d4 android.hardware.wifi.supplicant@1.0::ISupplicantP2pIfaceCallback
56128f74560571b6777d59453f35c6b35693ee377e2a23c807708906928f09de android.hardware.wifi.supplicant@1.0::ISupplicantP2pNetwork
2067c22197bca9743dab66a6f561a8a8375c67b4f76aed05f776839499bd4c8f android.hardware.wifi.supplicant@1.0::ISupplicantP2pNetworkCallback
7752e1de93aaf5fed37011c219ac247069f6af320b0810daa98510584a10e7b4 android.hardware.wifi.supplicant@1.0::ISupplicantStaIface
d781c8d7e7b3fe5cca8cf6e1d8806e770982ae5358c7816ed51b0f0ec272e70d android.hardware.wifi.supplicant@1.0::ISupplicantStaIfaceCallback
b12ef0bdd8a4d247a8a6e960b227ed32383f2b0241f55d67fcea6eff6a6737fa android.hardware.wifi.supplicant@1.0::ISupplicantStaNetwork
d8f0877ae1d321c1d884c7631dfe36cab0ec8a4b2863d4b687f85d3549a63bcc android.hardware.wifi.supplicant@1.0::ISupplicantStaNetworkCallback
fe3c3c2f572b72f15f8594c538b0577bd5c28722c31879cfe6231330cddb6747 android.hardware.wifi.supplicant@1.0::types

试下如何生成：

对比下hidl-gen生成的和原来的IWifi是否一样：

原来：

b9be36719a8ad534000a51ea07be91be94c405bf1e038ae825acf65087ffd378 android.hardware.wifi@1.0::IWifi

现在：

b9be36719a8ad534000a51ea07be91be94c405bf1e038ae825acf65087ffd378 android.hardware.wifi@1.0::IWifi

啊哈，一样的，没毛病。

也可以加::制定具体hidl接口生成hash

3. 注册服务

1.1/default/service.cpp

/** 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 <android-base/logging.h>
#include <hidl/HidlTransportSupport.h>
#include <utils/Looper.h>
#include <utils/StrongPointer.h>#include "wifi.h"using android::hardware::configureRpcThreadpool;
using android::hardware::joinRpcThreadpool;int main(int /*argc*/, char** argv) {android::base::InitLogging(argv,android::base::LogdLogger(android::base::SYSTEM));LOG(INFO) << "Wifi Hal is booting up...";configureRpcThreadpool(1, true /* callerWillJoin */);// Setup hwbinder serviceandroid::sp<android::hardware::wifi::V1_1::IWifi> service =new android::hardware::wifi::V1_1::implementation::Wifi();CHECK_EQ(service->registerAsService(), android::NO_ERROR)<< "Failed to register wifi HAL";joinRpcThreadpool();LOG(INFO) << "Wifi Hal is terminating...";return 0;
}

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（八十一）探索hidl-gen使用及IWifi.hal 实现