Modules

DFHZBLX

DFHZBLX is a new module which has been created to deal with LU6.2 BIND processing. Part of its function was formerly part of DFHZSCX. It is link-edited with DFHZSCX and is still logically part of it, but it returns directly to VTAM®, not via DFHZSCX.

There is a new part of the module, apart from that which was once contained in DFHZSCX, which deals with generic resource BIND processing. If CICS® is registered as a generic resource and the partner is also a generic resource, DFHZBLX has to decide on the appropriate type of connection. This may be either a generic resource name connection, in which the NETNAME is the partner's generic resource name, or a member name connection, in which the NETNAME is the partner's member name.

DFHZBLX is also responsible for setting the bits in the connection entry which are specific to generic resource.

If CICS is not registered as a generic resource, the generic resource code is not invoked.

DFHZGCH

DFHZGCH is a domain subroutine which is called by DFHEIQSC after one of the following commands.

Its function is to issue the VTAM CHANGE OPTCD=ENDAFFINITY command.

If the affinity is ended successfully,

The VTAM return codes are reflected back to DFHEIQSC.

DFHZGIN

DFHZGIN is a domain subroutine.

In a TOR it is called by DFHCRS when a request has been shipped from a remote system, if a terminal cannot be located.

In an AOR it is called by DFHALP when the schedule of an AID fails because the TOR has gone away.

It has two functions:

  1. INQUIRE_NQN

    A VTAM INQUIRE OPTCD=NQN is issued to find the fully qualified NETNAME of a terminal given the NETNAME as input. The fully qualified NETNAME is required for INQUIRE OPTCD=SESSNAME.

  2. INQUIRE_SESSNAME

    A VTAM INQUIRE OPTCD=SESSNAME is issued to find which member of a generic resource a terminal is logged on to given a fully qualified NETNAME as input.

The following responses are returned to the caller:

For the exception case an exception trace is written and a message in the range DFHZC0182 - DFHZC0185 is output to the CSNE log giving the VTAM return codes.

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