Several functions and a new pseudo-variable class were added to ipops module, allowing to do operations with DNS directly from configuration file.
One functionality is related to matching an IP address to a hostname. The hostname is resolved via a DNS query and then the IP is matched against the result set. There are two versions of this function, one using the system resolver and the other using the internal dns resolver, see:
Another enhancement is the possibility to store the result of a system dns query in a variable container and access the values from the config file – the function for the query is dns_query(hostname, pvid):