From fff23dac944879df6e15c65ca99a28d0e72e2000 Mon Sep 17 00:00:00 2001
From: "Earle F. Philhower, III" <earlephilhower@yahoo.com>
Date: Tue, 22 May 2018 07:39:00 -0700
Subject: [PATCH] Report connected when any bytes are available

The SSL pipeline is multi-stage, and the TCP connection can go down
even though there is still data waiting to be decrypted or in the
decryption buffer.

Explicitly check that there if there can be any data made available
to the app, and if so report that we are still connected().  When
there is no data and there is no TCP connection, report disconnected.

Fixes #4738
---
 libraries/ESP8266WiFi/src/WiFiClientSecureBearSSL.cpp | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/libraries/ESP8266WiFi/src/WiFiClientSecureBearSSL.cpp b/libraries/ESP8266WiFi/src/WiFiClientSecureBearSSL.cpp
index e94ad63579..5e641a678e 100644
--- a/libraries/ESP8266WiFi/src/WiFiClientSecureBearSSL.cpp
+++ b/libraries/ESP8266WiFi/src/WiFiClientSecureBearSSL.cpp
@@ -228,10 +228,8 @@ bool WiFiClientSecure::_clientConnected() {
 }
 
 uint8_t WiFiClientSecure::connected() {
-  if (_recvapp_len) {
-    return true;
-  }
-  if (_client && _client->state() == ESTABLISHED && _handshake_done) {
+  if (WiFiClient::connected() || available() ||
+      (_clientConnected() && _handshake_done)) {
     return true;
   }
   return false;