Solstice X.25 9.2 Developer's Guide

6.1 Commands and Structures Tables

Table 6-1 summarizes the NLI commands and their corresponding Packet Types and C structures:

Table 6-1 NLI Commands and Structures


NLI Command	X.25 Packet	NLI Structure
`N_Abort`	Abort Indication	`xabortf`
`N_CC`	Call Response/ Confirmation	`xccnff`
`N_CI`	Call Request/ Indication	`xcallf`
`N_DAck`	Data Acknowledgment Request/Indication	`xdatacf`
`N_Data`	Data	`xdataf`
`N_DC`	Clear Confirm	`xdcnff`
`N_DI`	Clear Request/Indication	`xdiscf`
`N_EAck`	Expedited Data Acknowledgement	`xedatacf`
`N_EData`	Expedited Data	`xedataf`
`N_RC`	Reset Response/Confirm	`xrscf`
`N_RI`	Reset Request/Indication	`xrstf`

These commands and structures in do not correspond to X.25 packet types:

Table 6-2 PVC and Listening Commands and Structures


NLI Command	NLI Structure	Description
`N_PVC_ATTACH`	`pvcattf`	Specify X.25 service to use with PVC
`N_PVC_DETACH`	`pvcdetf`	Specify X.25 service to stop using with PVC
`N_Xcanlis`	`xcanlisf`	Cancel listening
`N_Xlisten`	`xlistenf`	Listen for incoming calls

All of the structures listed in Table 6-1 and Table 6-2 are defined in the x25_primitives C union.

In addition to the structures that have a one-to-one mapping with NLI commands, Solstice X.25 provides a number of structures that are used by several of the commands. These are related to addressing and facilities, and are listed in Table 6-3:

Table 6-3 Generic Structures


structure	function
xaddrf	contains addressing information
lsapformat	defines the LSAP
extraformat	defines optional X.25 facilities
qosformat	defines OSI CONS Quality of Service (QOS) parameters