bugfix: fix some bugs

src/dns_client.c

@@ -615,7 +615,7 @@ static struct dns_server_group *_dns_client_get_dnsserver_group(const char *grou
  goto use_default;
  } else {
  if (list_empty(&group->head)) {
- tlog(TLOG_INFO, "group %s not exist, use default group.", group_name);
+ tlog(TLOG_DEBUG, "group %s not exist, use default group.", group_name);
  goto use_default;
  }
  }

src/dns_server.c

@@ -3209,7 +3209,7 @@ static struct dns_client_rules *_dns_server_get_client_rules_by_mac(uint8_t *net
 
  item = _dns_server_neighbor_cache_get_item(netaddr, netaddr_len);
  if (_dns_server_neighbor_cache_is_valid(item) == 0) {
- if (item->has_mac) {
+ if (item->has_mac == 0) {
  return NULL;
  }
  group_mac = dns_server_rule_group_mac_get(item->mac);

src/lib/conf.c

@@ -417,7 +417,8 @@ static int load_conf_file(const char *file, struct config_item *items, conf_erro
 
  line_len = 0;
  is_last_line_wrap = 0;
-
+ key[0] = '\0';
+ value[0] = '\0';
  filed_num = sscanf(line, "%63s %8191[^\r\n]s", key, value);
  if (filed_num <= 0) {
  continue;

src/tlog.c

@@ -459,7 +459,6 @@ static int _tlog_root_log_buffer(char *buff, int maxlen, void *userptr, const ch
  if (len + 1 < maxlen - 1) {
  *(buff + len) = '\0';
  len++;
- log_len++;
  }
  log_head->len = log_len;
  }