Bluetooth: Do not accept SCO without any active listener.

 - Some HS re-connect SCO after call disconnect.
   do not accept such incoming connection SCO connection
   requests.
 - Check for valid SCO listener before accepting incoming
   SCO connection requests.

Change-Id: Iab5853382413467dfc7514587f50894fe11c9633
CRs-Fixed: 754738

1 files changed, 20 insertions, 1 deletions

diff --git a/src/com/android/bluetooth/hfp/HeadsetStateMachine.java b/src/com/android/bluetooth/hfp/HeadsetStateMachine.java
index f3bcea996..798aa1e58 100644
--- a/src/com/android/bluetooth/hfp/HeadsetStateMachine.java
+++ b/src/com/android/bluetooth/hfp/HeadsetStateMachine.java
@@ -1218,6 +1218,12 @@ final class HeadsetStateMachine extends StateMachine {
 
             switch (state) {
                 case HeadsetHalConstants.AUDIO_STATE_CONNECTED:
+                    if (!isScoAcceptable()) {
+                        Log.e(TAG,"Audio Connected without any listener");
+                        disconnectAudioNative(getByteAddress(device));
+                        break;
+                    }
+
                     // TODO(BT) should I save the state for next broadcast as the prevState?
                     mAudioState = BluetoothHeadset.STATE_AUDIO_CONNECTED;
                     setAudioParameters(device); /*Set proper Audio Paramters.*/
@@ -2191,6 +2197,11 @@ final class HeadsetStateMachine extends StateMachine {
 
             switch (state) {
                 case HeadsetHalConstants.AUDIO_STATE_CONNECTED:
+                    if (!isScoAcceptable()) {
+                        Log.e(TAG,"Audio Connected without any listener");
+                        disconnectAudioNative(getByteAddress(device));
+                        break;
+                    }
                     mAudioState = BluetoothHeadset.STATE_AUDIO_CONNECTED;
                     setAudioParameters(device); /* Set proper Audio Parameters. */
                     mAudioManager.setBluetoothScoOn(true);
@@ -3047,7 +3058,7 @@ final class HeadsetStateMachine extends StateMachine {
                 removeMessages(DIALING_OUT_TIMEOUT);
             } else if (callState.mCallState ==
                 HeadsetHalConstants.CALL_STATE_ACTIVE || callState.mCallState
-                == HeadsetHalConstants.CALL_STATE_IDLE) {				
+                == HeadsetHalConstants.CALL_STATE_IDLE) {
                 mDialingOut = false;
             } 
         }
@@ -3657,6 +3668,14 @@ final class HeadsetStateMachine extends StateMachine {
                 (mPhoneState.getCallState() != HeadsetHalConstants.CALL_STATE_IDLE));
     }
 
+    // Accept incoming SCO only when there is active call, VR activated,
+    // active VOIP call and Incoming call with inband ringtone supported
+    private boolean isScoAcceptable() {
+        return (((mPhoneState.getCallState() == HeadsetHalConstants.CALL_STATE_INCOMING) &&
+                ((mLocalBrsf & BRSF_AG_IN_BAND_RING) != 0)) || mVoiceRecognitionStarted ||
+                 isInCall());
+    }
+
     boolean isConnected() {
         IState currentState = getCurrentState();
         return (currentState == mConnected || currentState == mAudioOn);