dns_server: fix ptr issue.

src/dns_server.c

@@ -4270,7 +4270,7 @@ static int _dns_server_ip_is_subnet(unsigned char *addr, int mask, unsigned char
  return 0;
 }
 
-static int _dns_server_process_private_ptr(unsigned char *addr, int addr_len)
+static int _dns_server_is_private_address(unsigned char *addr, int addr_len)
 {
  if (addr_len == 4) {
  if (addr[0] == 10 || (addr[0] == 172 && addr[1] >= 16 && addr[1] <= 31) || (addr[0] == 192 && addr[1] == 168)) {
@@ -4297,7 +4297,12 @@ static int _dns_server_process_local_ptr(struct dns_request *request)
  int found = 0;
 
  if (_dns_server_parser_addr_from_apra(request->domain, ptr_addr, &ptr_addr_len, sizeof(ptr_addr)) != 0) {
- return -1;
+ /* Determine if the smartdns service is in effect. */
+ if (strncasecmp(request->domain, "smartdns", sizeof("smartdns")) != 0) {
+ return -1;
+ }
+ found = 1;
+ goto out;
  }
 
  if (getifaddrs(&ifaddr) == -1) {
@@ -4335,17 +4340,12 @@ static int _dns_server_process_local_ptr(struct dns_request *request)
  found = 1;
  }
 
- /* Determine if the smartdns service is in effect. */
- if (found == 0 && strncasecmp(request->domain, "smartdns", sizeof("smartdns")) == 0) {
- found = 1;
- }
-
- if (found == 0 && _dns_server_process_private_ptr(ptr_addr, ptr_addr_len) == 0) {
+ if (found == 0 && _dns_server_is_private_address(ptr_addr, ptr_addr_len) == 0) {
  request->has_soa = 1;
  _dns_server_setup_soa(request);
  goto clear;
  }
-
+out:
  if (found == 0) {
  goto errout;
  }