From fef0d9818a52c2e8331590a18a49cdd3fa64ae81 Mon Sep 17 00:00:00 2001
From: Paul Sokolovsky <pfalcon@users.sourceforge.net>
Date: Thu, 14 Apr 2016 00:58:51 +0300
Subject: [PATCH] extmod/modlwip: lwip_tcp_receive(): Properly handle EOF for
 non-blocking sock.

---
 extmod/modlwip.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/extmod/modlwip.c b/extmod/modlwip.c
index 1ebcd8923c..441fd8cec9 100644
--- a/extmod/modlwip.c
+++ b/extmod/modlwip.c
@@ -451,6 +451,9 @@ STATIC mp_uint_t lwip_tcp_receive(lwip_socket_obj_t *socket, byte *buf, mp_uint_
 
         // Non-blocking socket
         if (socket->timeout == 0) {
+            if (socket->state == STATE_PEER_CLOSED) {
+                return 0;
+            }
             *_errno = EAGAIN;
             return -1;
         }