android wifi framework与wpa_supplicant的交互
android frmework直接与wpa_supplicant进行交互，使用aidl或者hidl
二、事件
framework注册事件的地方：
packages/modules/Wifi/service/java/com/android/server/wifi/SupplicantStaIfaceCallbackImpl.java
class SupplicantStaIfaceCallbackImpl extends ISupplicantStaIfaceCallback.Stub {
public void onStateChanged(int newState, byte bssid, int id, ArrayList<Byte> ssid..);
public void onDisconnected(byte[/* 6 */] bssid, boolean locallyGenerated, int reasonCode);
private void handleAssocRejectEvent(AssocRejectEventInfo assocRejectInfo)
}
注册此事件的地方
packages/modules/Wifi/service/java/com/android/server/wifi/SupplicantStaIfaceHal.java
这儿还需要进一步看是调用的哪个？这儿有v1、v2等
private boolean trySetupStaIfaceV1_4(String ifaceName,ISupplicantStaIface iface) {
SupplicantStaIfaceHalCallbackV1_4 callbackV14 =
new SupplicantStaIfaceHalCallbackV1_4(ifaceName);
if (!registerCallbackV1_4(getStaIfaceMockableV1_4(iface), callbackV14)) {
throw new RemoteException("Init StaIface V1_4 failed.");
}
/* keep this in a store to avoid recycling by garbage collector. */
mISupplicantStaIfaceCallbacks.put(ifaceName, callbackV14);
return true;
}
setupIface->setupStaIface->vendor_setupIface(new SupplicantStaIfaceHalCallback)
setupStaIface->trySetupStaIfaceV1_1->trySetupStaIfaceV1_2->....
hidl定义callback和接口的地方
hardware/interfaces/wifi/supplicant/1.0/ISupplicantStaIfaceCallback.hal
ISupplicantStaIfaceCallback在v1.1里有onDisconnected回调，后续的v1.2->v1.3->v1.4 的ISupplicantCallback.hal 都继承前面的版本
zheli
这里还有连接wifi失败时的ReasonCode、StatusCode、还有连接State
ReasonCode常见的有：
DEAUTH_LEAVING = 3、UNSPECIFIED = 1、INVALID_IE = 13、STA_LEAVING = 36、TIMEOUT = 39
State常见的有：
DISCONNECTED = 0、AUTHENTICATING = 4等
hardware/interfaces/wifi/supplicant/1.0/ISupplicantIface.hal
ISupplicantIface.hal 里有listNetworks、addNetwork接口
hardware/interfaces/wifi/supplicant/1.0/ISupplicantStaIface.hal
ISupplicantStaIface.hal里有定义接口
registerCallback(ISupplicantStaIfaceCallback callback)、reassociate、disconnect、setPowerSave、getMacAddress、setBtCoexistenceMode、setCountryCode等
hardware/interfaces/wifi/supplicant/1.0/ISupplicantCallback.hal
ISupplicantCallback.hal里有onInterfaceCreated、onInterfaceRemoved接口
wpa_supplicant接口事件注册的地方
以连接失败为例：
external/wpa_supplicant_8/wpa_supplicant/hidl/1.4/hidl_manager.h
这里include了很多hidl生成的.h文件，可以在out目录下查看
hidl_manager.h
#include <android/hardware/wifi/supplicant/1.0/ISupplicantCallback.h>
#include <android/hardware/wifi/supplicant/1.0/ISupplicantP2pIfaceCallback.h>
#include <android/hardware/wifi/supplicant/1.0/ISupplicantP2pNetworkCallback.h>
#include <android/hardware/wifi/supplicant/1.4/ISupplicantStaIfaceCallback.h>
#include <android/hardware/wifi/supplicant/1.0/ISupplicantStaNetworkCallback.h>
#include <android/hardware/wifi/supplicant/1.4/ISupplicantStaNetworkCallback.h>
在out目录下类似：
./soong/.intermediates/hardware/interfaces/wifi/supplicant/1.4/
android.hardware.wifi.supplicant@1.4_genc++_headers/gen/android/hardware/wifi/、supplicant/1.4/ISupplicantStaIfaceCallback.h
external/wpa_supplicant_8/wpa_supplicant/hidl/1.4/hidl_manager.cpp
void HidlManager::notifyDisconnectReason(struct wpa_supplicant *wpa_s) {
callWithEachStaIfaceCallback(
&ISupplicantStaIfaceCallback::onDisconnected, wpa_s->disconnect_reason);
}
如果连接密码失败，可以看下大致的如下路径 ：
events.wpa_supplicant_event_disassoc_finish (wpa_supplicant/events.c)
notify.wpas_notify_disconnect_reason-> (wpa_supplicant/notify.c)
hidl.wpas_hidl_notify_disconnect_reason-> （wpa_supplicant/hidl/1.4/hidl.cpp）
hidl_manager->notifyDisconnectReason
events.c
static void wpa_supplicant_event_disassoc_finish () {
if (could_be_psk_mismatch(wpa_s, reason_code, locally_generated)) {
wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - ""pre-shared key may be incorrect");
wpas_auth_failed(wpa_s, "WRONG_KEY");
wpas_notify_disconnect_reason(wpa_s);
}
}
原文地址：https://blog.csdn.net/yudelian/article/details/145141374
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