From e5e4ee6260e7b98d6c836e681dd253e9ca01c8d1 Mon Sep 17 00:00:00 2001
From: Przemek Zygmunt <p.zygmunt@acsoftware.pl>
Date: Wed, 27 Jan 2021 21:34:43 +0100
Subject: [PATCH] When a stream socket peer has performed an orderly shutdown,
 the return value will be 0 (the traditional end-of-file return).

---
 src/mqtt_pal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mqtt_pal.c b/src/mqtt_pal.c
index 759a0f7..9b9f69f 100644
--- a/src/mqtt_pal.c
+++ b/src/mqtt_pal.c
@@ -332,7 +332,7 @@ ssize_t mqtt_pal_recvall(mqtt_pal_socket_handle fd, void* buf, size_t bufsz, int
             /* successfully read bytes from the socket */
             buf += rv;
             bufsz -= rv;
-        } else if (rv < 0 && errno != EAGAIN && errno != EWOULDBLOCK) {
+        } else if (rv == 0 || (rv < 0 && errno != EAGAIN && errno != EWOULDBLOCK)) {
             /* an error occurred that wasn't "nothing to read". */
             return MQTT_ERROR_SOCKET_ERROR;
         }