From c5f632382f0fcd85889c22d974394bf1c4b05ff3 Mon Sep 17 00:00:00 2001
From: david <david@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Mon, 12 Nov 2012 19:34:23 +0000
Subject: [PATCH] Show an error instead of silently falling back to AF_INET6.

---
 ncat/ncat_main.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ncat/ncat_main.c b/ncat/ncat_main.c
index b99f81dac..df3b7e847 100644
--- a/ncat/ncat_main.c
+++ b/ncat/ncat_main.c
@@ -642,9 +642,13 @@ int main(int argc, char *argv[])
     if (targetss.storage.ss_family == AF_INET)
         targetss.in.sin_port = htons(o.portno);
 #ifdef HAVE_IPV6
-    else
+    else if (targetss.storage.ss_family == AF_INET6)
         targetss.in6.sin6_port = htons(o.portno);
 #endif
+    else if (targetss.storage.ss_family == AF_UNSPEC)
+	; /* Leave unspecified. */
+    else
+	bye("Unknown address family %d.", targetss.storage.ss_family);
 
     if (srcport != -1) {
         if (o.listen) {