Check if attribute handle supports emit before calling

sandeepmistry · rzr · commit e3b21dfe249f · 2021-04-15T10:19:48.000+02:00
Origin: noble#369 Change-Id: Icdc68c129ab7b165f5b30e15812e9d7316346146
diff --git a/lib/hci-socket/gatt.js b/lib/hci-socket/gatt.js
@@ -911,7 +911,9 @@ Gatt.prototype.handleWriteRequestOrCommand = function(request) {
               handleAttribute.emit('subscribe', this._mtu - 3, updateValueCallback);
             }
           } else {
-            handleAttribute.emit('unsubscribe');
+            if (handleAttribute.emit) {
+              handleAttribute.emit('unsubscribe');
+            }
           }
 
           result = ATT_ECODE_SUCCESS;

Original file line number	Diff line number	Diff line change
`@@ -911,7 +911,9 @@ Gatt.prototype.handleWriteRequestOrCommand = function(request) {`
`911`	`911`	`handleAttribute.emit('subscribe', this._mtu - 3, updateValueCallback);`
`912`	`912`	`}`
`913`	`913`	`} else {`
`914`		`- handleAttribute.emit('unsubscribe');`
	`914`	`+ if (handleAttribute.emit) {`
	`915`	`+ handleAttribute.emit('unsubscribe');`
	`916`	`+ }`
`915`	`917`	`}`
`916`	`918`
`917`	`919`	`result = ATT_ECODE_SUCCESS;`