Android Wifi小记 (2)

Hostapd ACS 开关控制

    public HostapdHal(Context context) {
        mEnableAcs = context.getResources().getBoolean(R.bool.config_wifi_softap_acs_supported);
        mEnableIeee80211AC =
                context.getResources().getBoolean(R.bool.config_wifi_softap_ieee80211ac_supported);
    }

采用了overlay，覆盖了aosp中设置的值。

// aosp
./frameworks/base/core/res/res/values/config.xml:    <bool translatable="false" name="config_wifi_softap_acs_supported">false</bool>
./frameworks/base/core/res/res/values/symbols.xml:  <java-symbol type="bool" name="config_wifi_softap_acs_supported" />

// overlay
./device/qcom/common/device/overlay/frameworks/base/core/res/res/values/config.xml:   <bool translatable="false" name="config_wifi_softap_acs_supported">true</bool>
./device/qcom/common/automotive/device/overlay/frameworks/base/core/res/res/values/config.xml:   <bool translatable="false" name="config_wifi_softap_acs_supported">true</bool>
./vendor/qcom/proprietary/resource-overlay/common/Frameworks/res/values/config.xml:   <bool translatable="false" name="config_wifi_softap_acs_supported">true</bool>

其中device, automotive 代表手机和车机平台。选择哪个是根据宏定义TARGET_BOARD_AUTO决定的。

//file path: device/qcom/common/base.mk
# enable overlays to use our version of
# source/resources etc.
ifneq ($(strip $(TARGET_BOARD_AUTO)),true)
DEVICE_PACKAGE_OVERLAYS += device/qcom/common/device/overlay
PRODUCT_PACKAGE_OVERLAYS += device/qcom/common/product/overlay
else
DEVICE_PACKAGE_OVERLAYS += device/qcom/common/automotive/device/overlay
PRODUCT_PACKAGE_OVERLAYS += device/qcom/common/automotive/product/overlay
endif
endif

//file path device/qcom/msmnile_gvmq/msmnile_gvmq.mk
TARGET_BOARD_AUTO := true

---

hotspot 开关流程

两个步骤。

• 1 hotspot 开关不是直接操作WifiManage的 startSoftAp()打开的。
• 2 ap 相关的设置是通过WifiManage 更新的。不是随着startSoftAp传进的。

//Setting WifiTetherSettings.java 
    @Override
    public void onTetherConfigUpdated() {
        final WifiConfiguration config = buildNewConfig();
        mPasswordPreferenceController.updateVisibility(config.getAuthType());

        /**
         * if soft AP is stopped, bring up
         * else restart with new config
         * TODO: update config on a running access point when framework support is added
         */
        if (mWifiManager.getWifiApState() == WifiManager.WIFI_AP_STATE_ENABLED) {
            Log.d("TetheringSettings",
                    "Wifi AP config changed while enabled, stop and restart");
            mRestartWifiApAfterConfigChange = true;
            mSwitchBarController.stopTether();
        }
        mWifiManager.setWifiApConfiguration(config);
    }

//system_server WifiServiceImpl.java 需要权限
	private boolean checkNetworkSettingsPermission(int pid, int uid) {
        return mContext.checkPermission(android.Manifest.permission.NETWORK_SETTINGS, pid, uid)
                == PackageManager.PERMISSION_GRANTED;
    }
	


//Setting  WifiTetherSwitchBarController.java
    void stopTether() {
        mSwitchBar.setEnabled(false);
        mConnectivityManager.stopTethering(TETHERING_WIFI);
    }

    void startTether() {
        mSwitchBar.setEnabled(false);
        mConnectivityManager.startTethering(TETHERING_WIFI, true /* showProvisioningUi */,
                mOnStartTetheringCallback, new Handler(Looper.getMainLooper()));
    }

---

Wifi WireShare 标签

帧类型	过滤器语法
Management frame	wlan.fc.type == 0
Control frame	wlan.fc.type == 1
Data frame	wlan.fc.type == 2
Association request	wlan.fc.type_subtype == 0x00
Association response	wlan.fc.type_subtype == 0x01
Reassociation request	wlan.fc.type_subtype == 0x02
Reassociation response	wlan.fc.type_subtype == 0x03
Probe request	wlan.fc.type_subtype == 0x04
Probe response	wlan.fc.type_subtype == 0x05
Beacon	wlan.fc.type_subtype == 0x08
Disassociate	wlan.fc.type_subtype == 0x0A
Authentication	wlan.fc.type_subtype == 0x0B
Deauthentication	wlan.fc.type_subtype == 0x0C
Action frame	wlan.fc.type_subtype == 0x0D
Block ACK requests	wlan.fc.type_subtype == 0x18
Block ACK	wlan.fc.type_subtype == 0x19
Power save poll	wlan.fc.type_subtype == 0x1A
Request to send	wlan.fc.type_subtype == 0x1B
Clear to send	wlan.fc.type_subtype == 0x1C
ACK	wlan.fc.type_subtype == 0x1D
Contention free period end	wlan.fc.type_subtype == 0x1E
NULL data	wlan.fc.type_subtype == 0x24
QoS data	wlan.fc.type_subtype == 0x28
Null QoS data	wlan.fc.type_subtype == 0x2C

本文地址：https://blog.csdn.net/github_33381613/article/details/108737015