Send frequency changed event to framework

When supplicant receives the channel change event
(NL80211_CMD_CH_SWITCH_NOTIFY) from driver, send
the new operating frequency information to framework.

Bug: 202758240
Test: Manually triggered channel switch through hostapd command
    and verified the new frequency in p2p group info logs
Change-Id: I05f10077ac497b934eb2c0560e179cdf4ed1497f

wpa_supplicant/aidl/aidl.cpp

@@ -921,3 +921,18 @@ void wpas_aidl_notify_network_not_found(struct wpa_supplicant *wpa_s)
 
 	aidl_manager->notifyNetworkNotFound(wpa_s);
 }
+
+void wpas_aidl_notify_bss_freq_changed(struct wpa_supplicant *wpa_s)
+{
+	if (!wpa_s)
+		return;
+
+	AidlManager *aidl_manager = AidlManager::getInstance();
+	if (!aidl_manager)
+		return;
+
+	wpa_printf(MSG_DEBUG, "Notify %s frequency changed to %d",
+	    wpa_s->ifname, wpa_s->assoc_freq);
+
+	aidl_manager->notifyBssFreqChanged(wpa_s);
+}

wpa_supplicant/aidl/aidl.h

@@ -126,6 +126,7 @@ extern "C"
 	void wpas_aidl_notify_transition_disable(
 		struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid, u8 bitmap);
 	void wpas_aidl_notify_network_not_found(struct wpa_supplicant *wpa_s);
+	void wpas_aidl_notify_bss_freq_changed(struct wpa_supplicant *wpa_s);
 #else   // CONFIG_CTRL_IFACE_AIDL
 static inline int wpas_aidl_register_interface(struct wpa_supplicant *wpa_s)
 {
@@ -277,6 +278,8 @@ static void wpas_aidl_notify_transition_disable(struct wpa_supplicant *wpa_s,
 {}
 static void wpas_aidl_notify_network_not_found(struct wpa_supplicant *wpa_s)
 {}
+void wpas_aidl_notify_bss_freq_changed(struct wpa_supplicant *wpa_s)
+{}
 #endif  // CONFIG_CTRL_IFACE_AIDL
 
 #ifdef _cplusplus

wpa_supplicant/aidl/aidl_manager.cpp

@@ -1892,6 +1892,29 @@ void AidlManager::notifyNetworkNotFound(struct wpa_supplicant *wpa_s)
 	callWithEachStaIfaceCallback(misc_utils::charBufToString(wpa_s->ifname), func);
 }
 
+void AidlManager::notifyBssFreqChanged(struct wpa_supplicant *wpa_group_s)
+{
+	if (!wpa_group_s || !wpa_group_s->parent)
+		return;
+
+	// For group notifications, need to use the parent iface for callbacks.
+	struct wpa_supplicant *wpa_s = getTargetP2pIfaceForGroup(wpa_group_s);
+	if (!wpa_s) {
+		wpa_printf(MSG_INFO, "Drop BSS frequency changed event");
+		return;
+	}
+
+	uint32_t aidl_freq = wpa_group_s->current_bss
+				? wpa_group_s->current_bss->freq
+				: wpa_group_s->assoc_freq;
+
+	const std::function<
+		ndk::ScopedAStatus(std::shared_ptr<ISupplicantP2pIfaceCallback>)>
+		func = std::bind(&ISupplicantP2pIfaceCallback::onGroupFrequencyChanged,
+		std::placeholders::_1, misc_utils::charBufToString(wpa_group_s->ifname), aidl_freq);
+	callWithEachP2pIfaceCallback(misc_utils::charBufToString(wpa_s->ifname), func);
+}
+
 /**
  * Retrieve the |ISupplicantP2pIface| aidl object reference using the provided
  * ifname.

wpa_supplicant/aidl/aidl_manager.h

@@ -143,6 +143,7 @@ public:
 			struct wpa_ssid *ssid,
 			u8 bitmap);
 	void notifyNetworkNotFound(struct wpa_supplicant *wpa_s);
+	void notifyBssFreqChanged(struct wpa_supplicant *wpa_s);
 
 	// Methods called from aidl objects.
 	void notifyExtRadioWorkStart(struct wpa_supplicant *wpa_s, uint32_t id);

wpa_supplicant/notify.c

@@ -467,6 +467,8 @@ void wpas_notify_bss_freq_changed(struct wpa_supplicant *wpa_s,
 		return;
 
 	wpas_dbus_bss_signal_prop_changed(wpa_s, WPAS_DBUS_BSS_PROP_FREQ, id);
+
+	wpas_aidl_notify_bss_freq_changed(wpa_s);
 }