properly handling the shutdown when multiple ones go on EAGAIN back to

back.

src/internal.c

@@ -25063,6 +25063,19 @@ static int SendAlert_ex(WOLFSSL* ssl, int severity, int type)
         }
     #endif
 
+    /*
+     * We check if we are trying to send a
+     * CLOSE_NOTIFY alert
+     * */
+    if (type == 0) {
+        if (!ssl->options.sentNotify) {
+            ssl->options.sentNotify = 1;
+        }  else {
+            /* CLOSE_NOTIFY already sent */
+            return 0;
+        }
+    }
+
     ssl->buffers.outputBuffer.length += sendSz;
 
     ret = SendBuffered(ssl);