From 118eb0a68ce3250aa4528e6086b2bd0567e7638c Mon Sep 17 00:00:00 2001
From: LemonBoy <thatlemon@gmail.com>
Date: Wed, 27 Jan 2016 15:54:29 +0100
Subject: [PATCH] Call getnameinfo with NI_NAMEREQD flag.

This way net_gethostbyaddr will fail when the system is unable to
resolve the address to a valid host name.
Without this flag in case of failure the function would return the ip
address instead of failing.
---
 src/core/network.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/core/network.c b/src/core/network.c
index 28189661..8abc1ba1 100644
--- a/src/core/network.c
+++ b/src/core/network.c
@@ -447,8 +447,10 @@ int net_gethostbyaddr(IPADDR *ip, char **name)
 	sin_set_ip(&so, ip);
 
 	/* save error to host_error for later use */
-        host_error = getnameinfo((struct sockaddr *) &so, sizeof(so),
-                                 hostname, sizeof(hostname), NULL, 0, 0);
+        host_error = getnameinfo((struct sockaddr *)&so, sizeof(so),
+				 hostname, sizeof(hostname),
+				 NULL, 0,
+				 NI_NAMEREQD);
         if (host_error != 0)
                 return host_error;