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This indication is generated when another NOF application or a SNAP-IX administration tool makes a change to the SNA network file sna.net. The target for this verb, identified by the target_handle parameter on the REGISTER_INDICATION_SINK verb that registers to receive this indication, must be the sna.net file.
No specific VCB structure is associated with this indication. To register for SNA network indications, the application specifies the value AP_SNA_NET_INDICATION as the indication_opcode parameter on REGISTER_INDICATION_SINK. When a change is made to the SNA network file, SNAP-IX then reports this to the application's callback routine by sending a copy of the VCB from the NOF verb (ADD_BACKUP or DELETE_BACKUP) that made the change.
To enable the application to distinguish between SNA network indications and asynchronous responses to its own NOF verbs issued to the SNA network file, SNAP-IX changes the primary_rc parameter in the VCB for an indication. The value AP_INDICATION identifies a VCB associated with an SNA network file indication; the value AP_OK, or any other value, indicates an asynchronous response to one of the application's own NOF verbs.
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