From 096478dce19731ffe6fbba61dfad2fea4b57b37e Mon Sep 17 00:00:00 2001
From: Thomas Bernard <miniupnp@free.fr>
Date: Tue, 14 Nov 2023 21:15:58 +0100
Subject: [PATCH] fix getifaddr() error case

see #670
---
 miniupnpd/getifaddr.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/miniupnpd/getifaddr.c b/miniupnpd/getifaddr.c
index f7268ab..b6eaee1 100644
--- a/miniupnpd/getifaddr.c
+++ b/miniupnpd/getifaddr.c
@@ -2,7 +2,7 @@
 /* vim: tabstop=4 shiftwidth=4 noexpandtab
  * MiniUPnP project
  * http://miniupnp.free.fr/ or https://miniupnp.tuxfamily.org/
- * (c) 2006-2022 Thomas Bernard
+ * (c) 2006-2023 Thomas Bernard
  * This software is subject to the conditions detailed
  * in the LICENCE file provided within the distribution */
 
@@ -148,6 +148,12 @@ getifaddr(const char * ifname, char * buf, int len,
 		if(addr) *addr = ((struct sockaddr_in *)candidate->ifa_addr)->sin_addr;
 		if(mask) *mask = ((struct sockaddr_in *)candidate->ifa_netmask)->sin_addr;
 	}
+	else
+	{
+		syslog(LOG_WARNING, "no AF_INET address found for %s", ifname);
+		freeifaddrs(ifap);
+		return -1;
+	}
 	freeifaddrs(ifap);
 #endif
 	return 0;