Android 12 WiFi 连接流程
packages/apps/Settings/src/com/android/settings/wifi/WifiSettings.java
packages/modules/Wifi/framework/java/android/net/wifi/WifiManager.java
packages/modules/Wifi/service/java/com/android/server/wifi/WifiServiceImpl.java
packages/modules/Wifi/service/java/com/android/server/wifi/ConnectHelper.java
packages/modules/Wifi/service/java/com/android/server/wifi/ConcreteClientModeManager.java
packages/modules/Wifi/service/java/com/android/server/wifi/ClientModeImpl.java
packages/modules/Wifi/service/java/com/android/server/wifi/WifiNative.java
packages/modules/Wifi/service/java/com/android/server/wifi/SupplicantStaIfaceHal.java
packages/modules/Wifi/service/java/com/android/server/wifi/SupplicantStaNetworkHal.java
WifiSettings.java =>onSubmit(WifiDialog2 dialog):
-if (dialogMode == WifiConfigUiBase2.MODE_MODIFY)
--if (config == null)
Toast.makeText(getContext(), R.string.wifi_failed_save_message,Toast.LENGTH_SHORT).show();//config为null，弹出Toast
--else
mWifiManager.save(config, mSaveListener);//修改信息后，将信息进行保存
-else if (dialogMode == WifiConfigUiBase2.MODE_CONNECT || (dialogMode == WifiConfigUiBase2.MODE_VIEW && wifiEntry.canConnect()))
--if (config == null)
connect(wifiEntry, false /* editIfNoConfig */,false /* fullScreenEdit*/);
--else
mWifiManager.connect(config, new WifiConnectActionListener());//调用connect进行连接
-->WifiManager.java=>connect(@NonNull WifiConfiguration config, @Nullable ActionListener listener):connectInternal(config, WifiConfiguration.INVALID_NETWORK_ID, listener);
->connectInternal(@Nullable WifiConfiguration config, int networkId,@Nullable ActionListener listener):mService.connect(config, networkId, listenerProxy);
------>WifiServiceImpl.java=> connect(WifiConfiguration config, int netId, @Nullable IActionListener callback):
-mMakeBeforeBreakManager.stopAllSecondaryTransientClientModeManagers(() ->mConnectHelper.connectToNetwork(result, wrapper, uid));
-------->ConnectHelper.java=>connectToNetwork(@NonNull NetworkUpdateResult result,@NonNull ActionListenerWrapper wrapper,int callingUid):
-connectToNetwork(mActiveModeWarden.getPrimaryClientModeManager(), result, wrapper, callingUid);//mActiveModeWarden.getPrimaryClientModeManager()状态机获取当前状态
->connectToNetwork(@NonNull ClientModeManager clientModeManager,@NonNull NetworkUpdateResult result,@NonNull ActionListenerWrapper wrapper,int callingUid):
-mWifiConfigManager.updateBeforeConnect(netId, callingUid);
-clientModeManager.connectNetwork(result, wrapper, callingUid);//此时状态机应在ConnectModeState
---------->ConcreteClientModeManager.java=>connectNetwork(NetworkUpdateResult result, ActionListenerWrapper wrapper,int callingUid):-getClientMode().connectNetwork(result, wrapper, callingUid);
->getClientMode():
-if (mClientModeImpl != null)
return mClientModeImpl;//此时应在ClientModeImpl
-if (mScanOnlyModeImpl != null)
return mScanOnlyModeImpl;
return mDefaultClientModeManager
------------>ClientModeImpl.java=>connectNetwork(NetworkUpdateResult result, ActionListenerWrapper wrapper,int callingUid):
-Message message =obtainMessage(CMD_CONNECT_NETWORK, new ConnectNetworkMessage(result, wrapper));//将CMD_CONNECT_NETWORK加入到消息队列
-sendMessage(message);
->ClientModeImpl$ConnectableState->processMessage(Message message):
-case CMD_CONNECT_NETWORK:
-connectToUserSelectNetwork(netId, message.sendingUid, result.hasCredentialChanged());
-cnm.listener.sendSuccess();
->connectToUserSelectNetwork(int netId, int uid, boolean forceReconnect):
-startConnectToNetwork(netId, uid, SUPPLICANT_BSSID_ANY);
->startConnectToNetwork(int networkId, int uid, String bssid):sendMessage(CMD_START_CONNECT, networkId, uid, bssid);//发送CMD_START_CONNECT消息
->ClientModeImpl$ConnectableState->processMessage(Message message):
-case CMD_START_CONNECT:
-mLastScanRssi = mWifiConfigManager.findScanRssi(netId,
-mWifiHealthMonitor.getScanRssiValidTimeMs());
-mWifiScoreCard.noteConnectionAttempt(mWifiInfo, mLastScanRssi, config.SSID);
-mWifiBlocklistMonitor.setAllowlistSsids(config.SSID, Collections.emptyList());
-mWifiBlocklistMonitor.updateFirmwareRoamingConfiguration(Set.of(config.SSID));
-updateWifiConfigOnStartConnection(config, bssid);
-reportConnectionAttemptStart(config, mTargetBssid,WifiMetricsProto.ConnectionEvent.ROAM_UNRELATED);
-String currentMacAddress = mWifiNative.getMacAddress(mInterfaceName);//从底层获取MAC地址
-mWifiInfo.setMacAddress(currentMacAddress);//设置MAC地址
-mTargetWifiConfiguration = config;
-mNetworkNotFoundEventCount = 0;
-if (config.isFilsSha256Enabled() || config.isFilsSha384Enabled())
boolean isIpClientStarted = startIpClient(config, true);
-if (isIpClientStarted)
mIpClientWithPreConnection = true;
break;
-connectToNetwork(config);//连接
->connectToNetwork(WifiConfiguration config):
-if ((config != null) && mWifiNative.connectToNetwork(mInterfaceName, config))
-transitionTo(mL2ConnectingState);
-else
-stopIpClient();
-------------->WifiNative.java=>connectToNetwork(@NonNull String ifaceName, WifiConfiguration configuration):
-mWifiCondManager.abortScan(ifaceName);
-return mSupplicantStaIfaceHal.connectToNetwork(ifaceName, configuration);
---------------->SupplicantStaIfaceHal.java=> connectToNetwork(@NonNull String ifaceName, @NonNull WifiConfiguration config):
-Pair pair = addNetworkAndSaveConfig(ifaceName, config);
-->PairaddNetworkAndSaveConfig(@NonNull String ifaceName, WifiConfiguration config):
-SupplicantStaNetworkHal network = addNetwork(ifaceName);
-->SupplicantStaNetworkHal addNetwork(@NonNull String ifaceName):
-ISupplicantStaIface iface = checkSupplicantStaIfaceAndLogFailure(ifaceName, methodStr);
-iface.addNetwork((SupplicantStatus status,ISupplicantNetwork network) -> {
if (checkStatusAndLogFailure(status, methodStr)) {
newNetwork.value = network;
}
});//通过HIDL进入Supplicant
-networkHandle.select()
------------------>SupplicantStaNetworkHal.java=>select():
-SupplicantStatus status = mISupplicantStaNetwork.select(); addNetwork:
external/wpa_supplicant_8/wpa_supplicant/hidl/1.4/sta_iface.cpp
external/wpa_supplicant_8/wpa_supplicant/wpa_supplicant.c
external/wpa_supplicant_8/wpa_supplicant/config.c
external/wpa_supplicant_8/wpa_supplicant/notify.c
external/wpa_supplicant_8/wpa_supplicant/hidl/1.4/hidl.cpp
wpa_supplicant_add_network->wpa_config_add_network & wpas_notify_network_added->wpas_hidl_register_network
sta_iface.cpp=> StaIface::addNetworkInternal() =>struct wpa_ssid *ssid = wpa_supplicant_add_network(wpa_s);
-->wpa_supplicant.c=>struct wpa_ssid * wpa_supplicant_add_network(struct wpa_supplicant *wpa_s)
=>ssid = wpa_config_add_network(wpa_s->conf);
=>wpas_notify_network_added(wpa_s, ssid);
---->config.c=>struct wpa_ssid * wpa_config_add_network(struct wpa_config *config) =>wpa_config_update_prio_list(config);
==>int wpa_config_update_prio_list(struct wpa_config *config) =>wpa_config_add_prio_network(config, ssid)
==>int wpa_config_add_prio_network(struct wpa_config *config,struct wpa_ssid *ssid)
---->notify.c=>void wpas_notify_network_added(struct wpa_supplicant *wpa_s,struct wpa_ssid *ssid)
=>if (!ssid->p2p_group && wpa_s->global->p2p_group_formation != wpa_s)
wpas_dbus_register_network(wpa_s, ssid);
#ifdef CONFIG_HIDL
wpas_hidl_register_network(wpa_s, ssid);
#endif
------>hidl.cpp=>int wpas_hidl_register_network(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
=>return hidl_manager->registerNetwork(wpa_s, ssid);select:
external/wpa_supplicant_8/wpa_supplicant/hidl/1.4/sta_network.cpp
external/wpa_supplicant_8/wpa_supplicant/wpa_supplicant.c
/external/wpa_supplicant_8/wpa_supplicant/events.c
external/wpa_supplicant_8/src/rsn_supp/wpa.c
select->selectInternal->wpa_supplicant_select_network->wpa_supplicant_fast_associate->wpas_select_network_from_last_scan->wpa_supplicant_pick_network->wpa_supplicant_select_bss->wpa_supplicant_connect->wpa_supplicant_associate->wpas_start_assoc_cb->wpa_sm_set_assoc_wpa_ie
sta_network.cpp=>Return StaNetwork::select(select_cb _hidl_cb)
return validateAndCall(this, SupplicantStatusCode::FAILURE_NETWORK_INVALID,&StaNetwork::selectInternal, _hidl_cb);
=>SupplicantStatus StaNetwork::selectInternal()
wpa_supplicant_select_network(wpa_s, wpa_ssid);
-->wpa_supplicant.c=>void wpa_supplicant_select_network(struct wpa_supplicant *wpa_s,struct wpa_ssid *ssid)
wpa_supplicant_fast_associate(wpa_s)
---->events.c=>int wpa_supplicant_fast_associate(struct wpa_supplicant *wpa_s)
return wpas_select_network_from_last_scan(wpa_s, 0, 1);
=>static int wpas_select_network_from_last_scan(struct wpa_supplicant *wpa_s,int new_scan, int own_request)
selected = wpa_supplicant_pick_network(wpa_s, &ssid);
wpa_supplicant_connect(wpa_s, selected, ssid)
=>struct wpa_bss * wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,struct wpa_ssid **selected_ssid)
if (next_ssid && next_ssid->priority == wpa_s->conf->pssid[prio]->priority) {
selected = wpa_supplicant_select_bss(wpa_s, next_ssid, selected_ssid, 1);
if (selected)
break;
}
selected = wpa_supplicant_select_bss(wpa_s, wpa_s->conf->pssid[prio],selected_ssid, 0);
if (selected)
break;
=>static struct wpa_bss *wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s,struct wpa_ssid *group,struct wpa_ssid **selected_ssid,int only_first_ssid)
ssid = wpa_scan_res_match(wpa_s, i, bss, group,only_first_ssid, 0)
=>int wpa_supplicant_connect(struct wpa_supplicant *wpa_s,struct wpa_bss *selected,struct wpa_ssid *ssid)
wpa_supplicant_associate(wpa_s, selected, ssid);
------>wpa_supplicant.c=>void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,struct wpa_bss *bss, struct wpa_ssid *ssid)
radio_add_work(wpa_s, bss ? bss->freq : 0, "connect", 1,wpas_start_assoc_cb, cwork)
=>static void wpas_start_assoc_cb(struct wpa_radio_work *work, int deinit)
wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
-------->wpa.c=>int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)