HP-UX SNAplus2 R7 NOF Programmer's Guide

Introduction to the NOF API
SNAplus2 Resources
Figure 1–1 SNAplus2 Components
LU Services
Communications with
host and peer computers
User space
Kernel
SDLC Token Ring
LU 0
LU 1,2,3
LU 6.2
3270
emulation
program
LUA
Application
HLLAPI
Application
APPC
Application
CPI-C
Application
RCF
Local node
The local node, including its associated connectivity resources (DLCs, ports and LSs), is implemented as STREAMS
components in the kernel of the HP-UX system.
The 3270 emulation program, RJE workstation, APPC transaction programs, CPI-C applications, LUA applications,
and the Remote Command Facility (RCF) are user-space programs. SNAplus2 supports multiple copies of the 3270
emulation program, and multiple APPC TPs, CPI-C applications, and LUA applications, running concurrently.
1.3 SNAplus2 Resources
The resources of the SNAplus2 system can be divided into two types:
Node resources
Define the communications capabilities of a particular APPN node:
• Connectivity resources:
• DLCs
• Ports
• Link stations
• Connection networks
44