From f6539449c5332b9fb79a7dff844ef5b006445f56 Mon Sep 17 00:00:00 2001
From: Miroslav Lichvar <mlichvar@redhat.com>
Date: Wed, 4 Oct 2017 11:03:11 +0200
Subject: [PATCH] nameserv: set hints for getaddrinfo() according to -4/-6
 option

Avoid sending unnecessary DNS requests when the -4/-6 option is
specified.
---
 nameserv.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/nameserv.c b/nameserv.c
index b5899e7..1cb9608 100644
--- a/nameserv.c
+++ b/nameserv.c
@@ -53,7 +53,19 @@ DNS_Name2IPAddress(const char *name, IPAddr *ip_addrs, int max_addrs)
   max_addrs = MIN(max_addrs, DNS_MAX_ADDRESSES);
 
   memset(&hints, 0, sizeof (hints));
-  hints.ai_family = AF_UNSPEC;
+
+  switch (address_family) {
+    case IPADDR_INET4:
+      hints.ai_family = AF_INET;
+      break;
+#ifdef FEAT_IPV6
+    case IPADDR_INET6:
+      hints.ai_family = AF_INET6;
+      break;
+#endif
+    default:
+      hints.ai_family = AF_UNSPEC;
+  }
   hints.ai_socktype = SOCK_STREAM;
 
   result = getaddrinfo(name, NULL, &hints, &res);