From ba61480df52e3d79349492a589a5bd999cd8ccbd Mon Sep 17 00:00:00 2001
From: Paul Sokolovsky <pfalcon@users.sourceforge.net>
Date: Thu, 28 Apr 2016 17:29:11 +0300
Subject: [PATCH] extmod/modussl: SSL_OK from ssl_read() means "no user data so
 far".

SSL_OK is numeric 0, and it's *not* an EOF. So, should keep reading.
---
 extmod/modussl.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/extmod/modussl.c b/extmod/modussl.c
index b697bbdd66..51f4fead81 100644
--- a/extmod/modussl.c
+++ b/extmod/modussl.c
@@ -87,6 +87,11 @@ STATIC mp_uint_t socket_read(mp_obj_t o_in, void *buf, mp_uint_t size, int *errc
 
     while (o->bytes_left == 0) {
         mp_int_t r = ssl_read(o->ssl_sock, &o->buf);
+        if (r == SSL_OK) {
+            // SSL_OK from ssl_read() means "everything is ok, but there's
+            // not user data yet. So, we just keep reading.
+            continue;
+        }
         if (r < 0) {
             if (r == SSL_CLOSE_NOTIFY || r == SSL_ERROR_CONN_LOST) {
                 // EOF