From dc1b6d0436964d2ef32aedd4ab9266b2873a45d7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=B6ren=20Tempel?= <tempel@uni-bremen.de>
Date: Tue, 30 Nov 2021 01:12:40 +0100
Subject: [PATCH] sock_dns: include string.h for strlen(3) function prototype

Needed by the following code in `dns.c`:

https://github.com/RIOT-OS/RIOT/blob/e8cbc6da85c2f5c39f2f970e058ff7747bcd2ad2/sys/net/application_layer/sock_dns/dns.c#L39-L41

The include was probably wrongfully removed by accident in
e8cbc6da85c2f5c39f2f970e058ff7747bcd2ad2 (CC: @miri64).
---
 sys/net/application_layer/sock_dns/dns.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/net/application_layer/sock_dns/dns.c b/sys/net/application_layer/sock_dns/dns.c
index 3a8fa6ea3d..664e52af75 100644
--- a/sys/net/application_layer/sock_dns/dns.c
+++ b/sys/net/application_layer/sock_dns/dns.c
@@ -16,6 +16,7 @@
  */
 
 #include <errno.h>
+#include <string.h>
 
 #include "net/dns.h"
 #include "net/dns/msg.h"