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dns_gethostbyname: return error code if no valid server is set instead of calling the 'found' callback in this case (fixes bug #46887)

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sg 2016-03-07 19:47:39 +01:00
parent 80cc988f2f
commit 5cf802eda0
1 changed files with 5 additions and 0 deletions
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5
src/core/dns.c
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@ -1474,6 +1474,11 @@ dns_gethostbyname_addrtype(const char *hostname, ip_addr_t *addr, dns_found_call
LWIP_UNUSED_ARG(dns_addrtype);
#endif /* LWIP_IPV4 && LWIP_IPV6 */
/* prevent calling found callback if no server is set, return error instead */
if (ip_addr_isany_val(dns_servers[0])) {
return ERR_VAL;
}
/* queue query with specified callback */
return dns_enqueue(hostname, hostnamelen, found, callback_arg LWIP_DNS_ADDRTYPE_ARG(dns_addrtype));
}