WifiMonitor的事件发放

Wifi框架中WifiMonitor负责上报wpa_supplicant的消息给WifiStateMachine,WifiNative负责将WifiStateMachine的消息下发给wpa_supplicant执行.

本文先来简单介绍WifiMonitor如何处理事件以及怎么分发事件。(未完待续)

(1)

WifiStateMachineInitialState状态收到CMD_START_SUPPLICANT消息时候

if (mWifiNative.startSupplicant(mP2pSupported)) {
    setWifiState(WIFI_STATE_ENABLING);
    if (DBG) log("Supplicant start successful");
    mWifiMonitor.startMonitoring(mInterfaceName);
transitionTo(mSupplicantStartingState);
} else {……}

(2)

startMonitoring这是一个同步函数

(3)

关注ensureConnectedLocked函数

(4)

一个跟踪的线程类MonitorThread

private class MonitorThread extends Thread {
        private final LocalLog mLocalLog = mWifiNative.getLocalLog();

        public MonitorThread() {
            super("WifiMonitor");
        }

        public void run() {
            if (DBG) {
                Log.d(TAG, "MonitorThread start with mConnected=" + mConnected);
            }
            //noinspection InfiniteLoopStatement
            for (;;) {
                if (!mConnected) {
                    if (DBG) Log.d(TAG, "MonitorThread exit because mConnected is false");
                    break;
                }
                String eventStr = mWifiNative.waitForEvent();

                // Skip logging the common but mostly uninteresting events
                if (!eventStr.contains(BSS_ADDED_STR) && !eventStr.contains(BSS_REMOVED_STR)) {
                    if (DBG) Log.d(TAG, "Event [" + eventStr + "]");
                    mLocalLog.log("Event [" + eventStr + "]");
                }

                if (dispatchEvent(eventStr)) {
                    if (DBG) Log.d(TAG, "Disconnecting from the supplicant, no more events");
                    break;
                }
            }
        }
}

(5)

然后事件被dispatchEvent函数分发。

ispatchEvent函数有两个,一个是一个参数,一个是两个参数的。

1 private boolean dispatchEvent(String eventStr, String iface)
2 private synchronized boolean dispatchEvent(String eventStr)

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原文地址:https://www.cnblogs.com/claruarius/p/6379891.html