SNAX/APN Application Programming Manual

The SNALU Interface

SNAX/APN Application Programming Manual—420111-001

4-13

SNALU Application Initiates Session with Remote

SLU

Whichever method is used to specify the SLU name in the BIND request, the SLU name

must match the name configured on the VTAM system of the LU accepting the BIND

request for the BIND to succeed.

Response Formats

A SNALU application accepts responses from the SLU in the read portion of a

WRITEREAD call.

Table 4-2 shows how a positive response to a BIND request appears in the application’s

buffer.

For positive responses, the SNALU application need examine only the RTI control bit;

however, you may also want to check the request code and sequence number to verify

which request is being responded to.

Table 4-3 shows how a negative response to a BIND request appears in the application’s

buffer.

Table 4-2. Positive Response to BIND Request

Byte Description

0-8 SNAX header

(0-1) X’0100’ TC indicators field: EFI=1

(2-3) X’0000’ Status codes field

(4-5) Sequence number field (whatever was in the sequence number field

of the request that is being responded to)

(6-8) X’EB8000’ RU category: session control

RH indicators: RRI=1, FI=1, DR1I=1

9 request code (X’31’ for BIND)

Table 4-3. Negative Response to BIND Request (page 1 of 2)