Access to DNS takes place using the software package openNet Server V21.0, which contains SOCKETS(BS2000) V21.1, using the ported program GETDNS (see the “BCAM Volume 1/2” manual).
SOCKETS(BS2000) V21.1 contains its own copy of the GETDNS and is therefore independent from the GETDNS program needed for the name resolution for BCAM.
If DNS does not provide any corresponding information for the DNS information function which is called, an attempt is made to obtain this information from the BCAM transport system.
It is possible to reverse the order of the DNS resolution so that the information from the BCAM transport system is determined first. This can be configured with the option SO_RESOLVE_BCAM (see "getsockopt(), setsockopt() - get and set socket options").
This applies both for implementing host names and for the FQDN (Fully Qualified Domain Name).
Certain settings are to be configured via the configuration file SYSDAT.SOCKETS.nnn.RESOLV.CONF. nnn is the SOCKETS version, the current one being 211. A list of all available options can also be found in the manual “BCAM Volume 1/2”.