tests: net: dns-sd: Fix undefined behavior reported by UBSAN

htons() takes uint16_t as argument. Add the 'u' suffix to the
TTL constants to ensure the correct unsigned type is used and to avoid
undefined behavior if these functions are implemented as macros using
bit shifts.

Signed-off-by: Tim Pambor <[email protected]>

Author: tpambor

subsys/net/lib/dns/dns_sd.h

@@ -18,11 +18,11 @@
 #include "dns_pack.h"
 
 /* TODO: Move these into Kconfig */
-#define DNS_SD_PTR_TTL 4500
-#define DNS_SD_TXT_TTL 4500
-#define DNS_SD_SRV_TTL 120
-#define DNS_SD_A_TTL 120
-#define DNS_SD_AAAA_TTL 120
+#define DNS_SD_PTR_TTL 4500u
+#define DNS_SD_TXT_TTL 4500u
+#define DNS_SD_SRV_TTL 120u
+#define DNS_SD_A_TTL 120u
+#define DNS_SD_AAAA_TTL 120u
 
 #define DNS_SD_PTR_MASK (NS_CMPRSFLGS << 8)