From c7c39964885b5dd0c2757040647547f5bd05965d Mon Sep 17 00:00:00 2001
From: Christoph Baechler <cbaechler@gmail.com>
Date: Mon, 6 Nov 2023 10:50:33 +0100
Subject: [PATCH] dns: Fix fallback server init config with preferred IP4

2.1.3-esp: 5aab73d7 dns: fix init with only ipv4 enabled
2.1.3-esp: f7922143 feat(lwip):add fall back dns config in menuconfig
---
 src/core/dns.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/core/dns.c b/src/core/dns.c
index 68355487..4401318c 100644
--- a/src/core/dns.c
+++ b/src/core/dns.c
@@ -328,7 +328,9 @@ dns_init(void)
   /* initialize fallback dns DNS server address */
   ip_addr_t dnsserver;
   FALLBACK_DNS_SERVER_ADDRESS(&dnsserver);
+#if LWIP_IPV4 && LWIP_IPV6 && ESP_LWIP_FALLBACK_DNS_PREFER_IPV4
   dnsserver.type = IPADDR_TYPE_V4;
+#endif
   dns_setserver(DNS_FALLBACK_SERVER_INDEX, &dnsserver);
 #endif /* FALLBACK_DNS_SERVER_ADDRESS */